Initial import of modified Linux 2.6.28 tree

Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y

27 files changed, 27950 insertions, 0 deletions

diff --git a/fs/reiserfs/Makefile b/fs/reiserfs/Makefile
new file mode 100644
index 0000000..0eb7ac0
--- /dev/null
+++ b/fs/reiserfs/Makefile
@@ -0,0 +1,36 @@
+#
+# Makefile for the linux reiser-filesystem routines.
+#
+
+obj-$(CONFIG_REISERFS_FS) += reiserfs.o
+
+reiserfs-objs := bitmap.o do_balan.o namei.o inode.o file.o dir.o fix_node.o \
+		 super.o prints.o objectid.o lbalance.o ibalance.o stree.o \
+		 hashes.o tail_conversion.o journal.o resize.o \
+		 item_ops.o ioctl.o procfs.o
+
+ifeq ($(CONFIG_REISERFS_FS_XATTR),y)
+reiserfs-objs += xattr.o xattr_user.o xattr_trusted.o
+endif
+
+ifeq ($(CONFIG_REISERFS_FS_SECURITY),y)
+reiserfs-objs += xattr_security.o
+endif
+
+ifeq ($(CONFIG_REISERFS_FS_POSIX_ACL),y)
+reiserfs-objs += xattr_acl.o
+endif
+
+# gcc -O2 (the kernel default)  is overaggressive on ppc32 when many inline
+# functions are used.  This causes the compiler to advance the stack
+# pointer out of the available stack space, corrupting kernel space,
+# and causing a panic. Since this behavior only affects ppc32, this ifeq
+# will work around it. If any other architecture displays this behavior,
+# add it here.
+ifeq ($(CONFIG_PPC32),y)
+EXTRA_CFLAGS := $(call cc-ifversion, -lt, 0400, -O1)
+endif
+
+TAGS:
+	etags *.c
+
diff --git a/fs/reiserfs/README b/fs/reiserfs/README
new file mode 100644
index 0000000..90e1670
--- /dev/null
+++ b/fs/reiserfs/README
@@ -0,0 +1,161 @@
+[LICENSING] 
+
+ReiserFS is hereby licensed under the GNU General
+Public License version 2.
+
+Source code files that contain the phrase "licensing governed by
+reiserfs/README" are "governed files" throughout this file.  Governed
+files are licensed under the GPL.  The portions of them owned by Hans
+Reiser, or authorized to be licensed by him, have been in the past,
+and likely will be in the future, licensed to other parties under
+other licenses.  If you add your code to governed files, and don't
+want it to be owned by Hans Reiser, put your copyright label on that
+code so the poor blight and his customers can keep things straight.
+All portions of governed files not labeled otherwise are owned by Hans
+Reiser, and by adding your code to it, widely distributing it to
+others or sending us a patch, and leaving the sentence in stating that
+licensing is governed by the statement in this file, you accept this.
+It will be a kindness if you identify whether Hans Reiser is allowed
+to license code labeled as owned by you on your behalf other than
+under the GPL, because he wants to know if it is okay to do so and put
+a check in the mail to you (for non-trivial improvements) when he
+makes his next sale.  He makes no guarantees as to the amount if any,
+though he feels motivated to motivate contributors, and you can surely
+discuss this with him before or after contributing.  You have the
+right to decline to allow him to license your code contribution other
+than under the GPL.
+
+Further licensing options are available for commercial and/or other
+interests directly from Hans Reiser: hans@reiser.to.  If you interpret
+the GPL as not allowing those additional licensing options, you read
+it wrongly, and Richard Stallman agrees with me, when carefully read
+you can see that those restrictions on additional terms do not apply
+to the owner of the copyright, and my interpretation of this shall
+govern for this license.  
+
+Finally, nothing in this license shall be interpreted to allow you to
+fail to fairly credit me, or to remove my credits, without my
+permission, unless you are an end user not redistributing to others.
+If you have doubts about how to properly do that, or about what is
+fair, ask.  (Last I spoke with him Richard was contemplating how best
+to address the fair crediting issue in the next GPL version.)
+
+[END LICENSING]
+
+Reiserfs is a file system based on balanced tree algorithms, which is
+described at http://devlinux.com/namesys.
+
+Stop reading here.  Go there, then return.
+
+Send bug reports to yura@namesys.botik.ru.
+
+mkreiserfs and other utilities are in reiserfs/utils, or wherever your
+Linux provider put them.  There is some disagreement about how useful
+it is for users to get their fsck and mkreiserfs out of sync with the
+version of reiserfs that is in their kernel, with many important
+distributors wanting them out of sync.:-) Please try to remember to
+recompile and reinstall fsck and mkreiserfs with every update of
+reiserfs, this is a common source of confusion.  Note that some of the
+utilities cannot be compiled without accessing the balancing code
+which is in the kernel code, and relocating the utilities may require
+you to specify where that code can be found.
+
+Yes, if you update your reiserfs kernel module you do have to
+recompile your kernel, most of the time.  The errors you get will be
+quite cryptic if your forget to do so.
+
+Real users, as opposed to folks who want to hack and then understand
+what went wrong, will want REISERFS_CHECK off.
+
+Hideous Commercial Pitch: Spread your development costs across other OS
+vendors.  Select from the best in the world, not the best in your
+building, by buying from third party OS component suppliers.  Leverage
+the software component development power of the internet.  Be the most
+aggressive in taking advantage of the commercial possibilities of
+decentralized internet development, and add value through your branded
+integration that you sell as an operating system.  Let your competitors
+be the ones to compete against the entire internet by themselves.  Be
+hip, get with the new economic trend, before your competitors do.  Send
+email to hans@reiser.to.
+
+To understand the code, after reading the website, start reading the
+code by reading reiserfs_fs.h first.
+
+Hans Reiser was the project initiator, primary architect, source of all
+funding for the first 5.5 years, and one of the programmers.  He owns
+the copyright.
+
+Vladimir Saveljev was one of the programmers, and he worked long hours
+writing the cleanest code.  He always made the effort to be the best he
+could be, and to make his code the best that it could be.  What resulted
+was quite remarkable. I don't think that money can ever motivate someone
+to work the way he did, he is one of the most selfless men I know.
+
+Yura helps with benchmarking, coding hashes, and block pre-allocation
+code.
+
+Anatoly Pinchuk is a former member of our team who worked closely with
+Vladimir throughout the project's development.  He wrote a quite
+substantial portion of the total code.  He realized that there was a
+space problem with packing tails of files for files larger than a node
+that start on a node aligned boundary (there are reasons to want to node
+align files), and he invented and implemented indirect items and
+unformatted nodes as the solution.
+
+Konstantin Shvachko, with the help of the Russian version of a VC,
+tried to put me in a position where I was forced into giving control
+of the project to him.  (Fortunately, as the person paying the money
+for all salaries from my dayjob I owned all copyrights, and you can't
+really force takeovers of sole proprietorships.)  This was something
+curious, because he never really understood the value of our project,
+why we should do what we do, or why innovation was possible in
+general, but he was sure that he ought to be controlling it.  Every
+innovation had to be forced past him while he was with us.  He added
+two years to the time required to complete reiserfs, and was a net
+loss for me.  Mikhail Gilula was a brilliant innovator who also left
+in a destructive way that erased the value of his contributions, and
+that he was shown much generosity just makes it more painful.
+
+Grigory Zaigralin was an extremely effective system administrator for
+our group.
+
+Igor Krasheninnikov was wonderful at hardware procurement, repair, and
+network installation.
+
+Jeremy Fitzhardinge wrote the teahash.c code, and he gives credit to a
+textbook he got the algorithm from in the code.  Note that his analysis
+of how we could use the hashing code in making 32 bit NFS cookies work
+was probably more important than the actual algorithm.  Colin Plumb also
+contributed to it.
+
+Chris Mason dived right into our code, and in just a few months produced
+the journaling code that dramatically increased the value of ReiserFS.
+He is just an amazing programmer.
+
+Igor Zagorovsky is writing much of the new item handler and extent code
+for our next major release.
+
+Alexander Zarochentcev (sometimes known as zam, or sasha), wrote the
+resizer, and is hard at work on implementing allocate on flush.  SGI
+implemented allocate on flush before us for XFS, and generously took
+the time to convince me we should do it also.  They are great people,
+and a great company.
+
+Yuri Shevchuk and Nikita Danilov are doing squid cache optimization.
+
+Vitaly Fertman is doing fsck.
+
+Jeff Mahoney, of SuSE, contributed a few cleanup fixes, most notably
+the endian safe patches which allow ReiserFS to run on any platform
+supported by the Linux kernel.
+
+SuSE, IntegratedLinux.com, Ecila, MP3.com, bigstorage.com, and the
+Alpha PC Company made it possible for me to not have a day job
+anymore, and to dramatically increase our staffing.  Ecila funded
+hypertext feature development, MP3.com funded journaling, SuSE funded
+core development, IntegratedLinux.com funded squid web cache
+appliances, bigstorage.com funded HSM, and the alpha PC company funded
+the alpha port.  Many of these tasks were helped by sponsors other
+than the ones just named.  SuSE has helped in much more than just
+funding....
+
diff --git a/fs/reiserfs/bitmap.c b/fs/reiserfs/bitmap.c
new file mode 100644
index 0000000..4646caa
--- /dev/null
+++ b/fs/reiserfs/bitmap.c
@@ -0,0 +1,1295 @@
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ */
+/* Reiserfs block (de)allocator, bitmap-based. */
+
+#include <linux/time.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/errno.h>
+#include <linux/buffer_head.h>
+#include <linux/kernel.h>
+#include <linux/pagemap.h>
+#include <linux/vmalloc.h>
+#include <linux/reiserfs_fs_sb.h>
+#include <linux/reiserfs_fs_i.h>
+#include <linux/quotaops.h>
+
+#define PREALLOCATION_SIZE 9
+
+/* different reiserfs block allocator options */
+
+#define SB_ALLOC_OPTS(s) (REISERFS_SB(s)->s_alloc_options.bits)
+
+#define  _ALLOC_concentrating_formatted_nodes 0
+#define  _ALLOC_displacing_large_files 1
+#define  _ALLOC_displacing_new_packing_localities 2
+#define  _ALLOC_old_hashed_relocation 3
+#define  _ALLOC_new_hashed_relocation 4
+#define  _ALLOC_skip_busy 5
+#define  _ALLOC_displace_based_on_dirid 6
+#define  _ALLOC_hashed_formatted_nodes 7
+#define  _ALLOC_old_way 8
+#define  _ALLOC_hundredth_slices 9
+#define  _ALLOC_dirid_groups 10
+#define  _ALLOC_oid_groups 11
+#define  _ALLOC_packing_groups 12
+
+#define  concentrating_formatted_nodes(s)	test_bit(_ALLOC_concentrating_formatted_nodes, &SB_ALLOC_OPTS(s))
+#define  displacing_large_files(s)		test_bit(_ALLOC_displacing_large_files, &SB_ALLOC_OPTS(s))
+#define  displacing_new_packing_localities(s)	test_bit(_ALLOC_displacing_new_packing_localities, &SB_ALLOC_OPTS(s))
+
+#define SET_OPTION(optname) \
+   do { \
+        reiserfs_warning(s, "reiserfs: option \"%s\" is set", #optname); \
+        set_bit(_ALLOC_ ## optname , &SB_ALLOC_OPTS(s)); \
+    } while(0)
+#define TEST_OPTION(optname, s) \
+    test_bit(_ALLOC_ ## optname , &SB_ALLOC_OPTS(s))
+
+static inline void get_bit_address(struct super_block *s,
+				   b_blocknr_t block,
+				   unsigned int *bmap_nr,
+				   unsigned int *offset)
+{
+	/* It is in the bitmap block number equal to the block
+	 * number divided by the number of bits in a block. */
+	*bmap_nr = block >> (s->s_blocksize_bits + 3);
+	/* Within that bitmap block it is located at bit offset *offset. */
+	*offset = block & ((s->s_blocksize << 3) - 1);
+}
+
+int is_reusable(struct super_block *s, b_blocknr_t block, int bit_value)
+{
+	unsigned int bmap, offset;
+	unsigned int bmap_count = reiserfs_bmap_count(s);
+
+	if (block == 0 || block >= SB_BLOCK_COUNT(s)) {
+		reiserfs_warning(s,
+				 "vs-4010: is_reusable: block number is out of range %lu (%u)",
+				 block, SB_BLOCK_COUNT(s));
+		return 0;
+	}
+
+	get_bit_address(s, block, &bmap, &offset);
+
+	/* Old format filesystem? Unlikely, but the bitmaps are all up front so
+	 * we need to account for it. */
+	if (unlikely(test_bit(REISERFS_OLD_FORMAT,
+			      &(REISERFS_SB(s)->s_properties)))) {
+		b_blocknr_t bmap1 = REISERFS_SB(s)->s_sbh->b_blocknr + 1;
+		if (block >= bmap1 &&
+		    block <= bmap1 + bmap_count) {
+			reiserfs_warning(s, "vs: 4019: is_reusable: "
+					 "bitmap block %lu(%u) can't be freed or reused",
+					 block, bmap_count);
+			return 0;
+		}
+	} else {
+		if (offset == 0) {
+			reiserfs_warning(s, "vs: 4020: is_reusable: "
+					 "bitmap block %lu(%u) can't be freed or reused",
+					 block, bmap_count);
+			return 0;
+		}
+	}
+
+	if (bmap >= bmap_count) {
+		reiserfs_warning(s,
+				 "vs-4030: is_reusable: there is no so many bitmap blocks: "
+				 "block=%lu, bitmap_nr=%u", block, bmap);
+		return 0;
+	}
+
+	if (bit_value == 0 && block == SB_ROOT_BLOCK(s)) {
+		reiserfs_warning(s,
+				 "vs-4050: is_reusable: this is root block (%u), "
+				 "it must be busy", SB_ROOT_BLOCK(s));
+		return 0;
+	}
+
+	return 1;
+}
+
+/* searches in journal structures for a given block number (bmap, off). If block
+   is found in reiserfs journal it suggests next free block candidate to test. */
+static inline int is_block_in_journal(struct super_block *s, unsigned int bmap,
+				      int off, int *next)
+{
+	b_blocknr_t tmp;
+
+	if (reiserfs_in_journal(s, bmap, off, 1, &tmp)) {
+		if (tmp) {	/* hint supplied */
+			*next = tmp;
+			PROC_INFO_INC(s, scan_bitmap.in_journal_hint);
+		} else {
+			(*next) = off + 1;	/* inc offset to avoid looping. */
+			PROC_INFO_INC(s, scan_bitmap.in_journal_nohint);
+		}
+		PROC_INFO_INC(s, scan_bitmap.retry);
+		return 1;
+	}
+	return 0;
+}
+
+/* it searches for a window of zero bits with given minimum and maximum lengths in one bitmap
+ * block; */
+static int scan_bitmap_block(struct reiserfs_transaction_handle *th,
+			     unsigned int bmap_n, int *beg, int boundary,
+			     int min, int max, int unfm)
+{
+	struct super_block *s = th->t_super;
+	struct reiserfs_bitmap_info *bi = &SB_AP_BITMAP(s)[bmap_n];
+	struct buffer_head *bh;
+	int end, next;
+	int org = *beg;
+
+	BUG_ON(!th->t_trans_id);
+
+	RFALSE(bmap_n >= reiserfs_bmap_count(s), "Bitmap %u is out of "
+	       "range (0..%u)", bmap_n, reiserfs_bmap_count(s) - 1);
+	PROC_INFO_INC(s, scan_bitmap.bmap);
+/* this is unclear and lacks comments, explain how journal bitmaps
+   work here for the reader.  Convey a sense of the design here. What
+   is a window? */
+/* - I mean `a window of zero bits' as in description of this function - Zam. */
+
+	if (!bi) {
+		reiserfs_warning(s, "NULL bitmap info pointer for bitmap %d",
+				 bmap_n);
+		return 0;
+	}
+
+	bh = reiserfs_read_bitmap_block(s, bmap_n);
+	if (bh == NULL)
+		return 0;
+
+	while (1) {
+	      cont:
+		if (bi->free_count < min) {
+			brelse(bh);
+			return 0;	// No free blocks in this bitmap
+		}
+
+		/* search for a first zero bit -- beggining of a window */
+		*beg = reiserfs_find_next_zero_le_bit
+		    ((unsigned long *)(bh->b_data), boundary, *beg);
+
+		if (*beg + min > boundary) {	/* search for a zero bit fails or the rest of bitmap block
+						 * cannot contain a zero window of minimum size */
+			brelse(bh);
+			return 0;
+		}
+
+		if (unfm && is_block_in_journal(s, bmap_n, *beg, beg))
+			continue;
+		/* first zero bit found; we check next bits */
+		for (end = *beg + 1;; end++) {
+			if (end >= *beg + max || end >= boundary
+			    || reiserfs_test_le_bit(end, bh->b_data)) {
+				next = end;
+				break;
+			}
+			/* finding the other end of zero bit window requires looking into journal structures (in
+			 * case of searching for free blocks for unformatted nodes) */
+			if (unfm && is_block_in_journal(s, bmap_n, end, &next))
+				break;
+		}
+
+		/* now (*beg) points to beginning of zero bits window,
+		 * (end) points to one bit after the window end */
+		if (end - *beg >= min) {	/* it seems we have found window of proper size */
+			int i;
+			reiserfs_prepare_for_journal(s, bh, 1);
+			/* try to set all blocks used checking are they still free */
+			for (i = *beg; i < end; i++) {
+				/* It seems that we should not check in journal again. */
+				if (reiserfs_test_and_set_le_bit
+				    (i, bh->b_data)) {
+					/* bit was set by another process
+					 * while we slept in prepare_for_journal() */
+					PROC_INFO_INC(s, scan_bitmap.stolen);
+					if (i >= *beg + min) {	/* we can continue with smaller set of allocated blocks,
+								 * if length of this set is more or equal to `min' */
+						end = i;
+						break;
+					}
+					/* otherwise we clear all bit were set ... */
+					while (--i >= *beg)
+						reiserfs_test_and_clear_le_bit
+						    (i, bh->b_data);
+					reiserfs_restore_prepared_buffer(s, bh);
+					*beg = org;
+					/* ... and search again in current block from beginning */
+					goto cont;
+				}
+			}
+			bi->free_count -= (end - *beg);
+			journal_mark_dirty(th, s, bh);
+			brelse(bh);
+
+			/* free block count calculation */
+			reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
+						     1);
+			PUT_SB_FREE_BLOCKS(s, SB_FREE_BLOCKS(s) - (end - *beg));
+			journal_mark_dirty(th, s, SB_BUFFER_WITH_SB(s));
+
+			return end - (*beg);
+		} else {
+			*beg = next;
+		}
+	}
+}
+
+static int bmap_hash_id(struct super_block *s, u32 id)
+{
+	char *hash_in = NULL;
+	unsigned long hash;
+	unsigned bm;
+
+	if (id <= 2) {
+		bm = 1;
+	} else {
+		hash_in = (char *)(&id);
+		hash = keyed_hash(hash_in, 4);
+		bm = hash % reiserfs_bmap_count(s);
+		if (!bm)
+			bm = 1;
+	}
+	/* this can only be true when SB_BMAP_NR = 1 */
+	if (bm >= reiserfs_bmap_count(s))
+		bm = 0;
+	return bm;
+}
+
+/*
+ * hashes the id and then returns > 0 if the block group for the
+ * corresponding hash is full
+ */
+static inline int block_group_used(struct super_block *s, u32 id)
+{
+	int bm = bmap_hash_id(s, id);
+	struct reiserfs_bitmap_info *info = &SB_AP_BITMAP(s)[bm];
+
+	/* If we don't have cached information on this bitmap block, we're
+	 * going to have to load it later anyway. Loading it here allows us
+	 * to make a better decision. This favors long-term performance gain
+	 * with a better on-disk layout vs. a short term gain of skipping the
+	 * read and potentially having a bad placement. */
+	if (info->free_count == UINT_MAX) {
+		struct buffer_head *bh = reiserfs_read_bitmap_block(s, bm);
+		brelse(bh);
+	}
+
+	if (info->free_count > ((s->s_blocksize << 3) * 60 / 100)) {
+		return 0;
+	}
+	return 1;
+}
+
+/*
+ * the packing is returned in disk byte order
+ */
+__le32 reiserfs_choose_packing(struct inode * dir)
+{
+	__le32 packing;
+	if (TEST_OPTION(packing_groups, dir->i_sb)) {
+		u32 parent_dir = le32_to_cpu(INODE_PKEY(dir)->k_dir_id);
+		/*
+		 * some versions of reiserfsck expect packing locality 1 to be
+		 * special
+		 */
+		if (parent_dir == 1 || block_group_used(dir->i_sb, parent_dir))
+			packing = INODE_PKEY(dir)->k_objectid;
+		else
+			packing = INODE_PKEY(dir)->k_dir_id;
+	} else
+		packing = INODE_PKEY(dir)->k_objectid;
+	return packing;
+}
+
+/* Tries to find contiguous zero bit window (given size) in given region of
+ * bitmap and place new blocks there. Returns number of allocated blocks. */
+static int scan_bitmap(struct reiserfs_transaction_handle *th,
+		       b_blocknr_t * start, b_blocknr_t finish,
+		       int min, int max, int unfm, sector_t file_block)
+{
+	int nr_allocated = 0;
+	struct super_block *s = th->t_super;
+	/* find every bm and bmap and bmap_nr in this file, and change them all to bitmap_blocknr
+	 * - Hans, it is not a block number - Zam. */
+
+	unsigned int bm, off;
+	unsigned int end_bm, end_off;
+	unsigned int off_max = s->s_blocksize << 3;
+
+	BUG_ON(!th->t_trans_id);
+
+	PROC_INFO_INC(s, scan_bitmap.call);
+	if (SB_FREE_BLOCKS(s) <= 0)
+		return 0;	// No point in looking for more free blocks
+
+	get_bit_address(s, *start, &bm, &off);
+	get_bit_address(s, finish, &end_bm, &end_off);
+	if (bm > reiserfs_bmap_count(s))
+		return 0;
+	if (end_bm > reiserfs_bmap_count(s))
+		end_bm = reiserfs_bmap_count(s);
+
+	/* When the bitmap is more than 10% free, anyone can allocate.
+	 * When it's less than 10% free, only files that already use the
+	 * bitmap are allowed. Once we pass 80% full, this restriction
+	 * is lifted.
+	 *
+	 * We do this so that files that grow later still have space close to
+	 * their original allocation. This improves locality, and presumably
+	 * performance as a result.
+	 *
+	 * This is only an allocation policy and does not make up for getting a
+	 * bad hint. Decent hinting must be implemented for this to work well.
+	 */
+	if (TEST_OPTION(skip_busy, s)
+	    && SB_FREE_BLOCKS(s) > SB_BLOCK_COUNT(s) / 20) {
+		for (; bm < end_bm; bm++, off = 0) {
+			if ((off && (!unfm || (file_block != 0)))
+			    || SB_AP_BITMAP(s)[bm].free_count >
+			    (s->s_blocksize << 3) / 10)
+				nr_allocated =
+				    scan_bitmap_block(th, bm, &off, off_max,
+						      min, max, unfm);
+			if (nr_allocated)
+				goto ret;
+		}
+		/* we know from above that start is a reasonable number */
+		get_bit_address(s, *start, &bm, &off);
+	}
+
+	for (; bm < end_bm; bm++, off = 0) {
+		nr_allocated =
+		    scan_bitmap_block(th, bm, &off, off_max, min, max, unfm);
+		if (nr_allocated)
+			goto ret;
+	}
+
+	nr_allocated =
+	    scan_bitmap_block(th, bm, &off, end_off + 1, min, max, unfm);
+
+      ret:
+	*start = bm * off_max + off;
+	return nr_allocated;
+
+}
+
+static void _reiserfs_free_block(struct reiserfs_transaction_handle *th,
+				 struct inode *inode, b_blocknr_t block,
+				 int for_unformatted)
+{
+	struct super_block *s = th->t_super;
+	struct reiserfs_super_block *rs;
+	struct buffer_head *sbh, *bmbh;
+	struct reiserfs_bitmap_info *apbi;
+	unsigned int nr, offset;
+
+	BUG_ON(!th->t_trans_id);
+
+	PROC_INFO_INC(s, free_block);
+
+	rs = SB_DISK_SUPER_BLOCK(s);
+	sbh = SB_BUFFER_WITH_SB(s);
+	apbi = SB_AP_BITMAP(s);
+
+	get_bit_address(s, block, &nr, &offset);
+
+	if (nr >= reiserfs_bmap_count(s)) {
+		reiserfs_warning(s, "vs-4075: reiserfs_free_block: "
+				 "block %lu is out of range on %s "
+				 "(nr=%u,max=%u)", block,
+				 reiserfs_bdevname(s), nr,
+				 reiserfs_bmap_count(s));
+		return;
+	}
+
+	bmbh = reiserfs_read_bitmap_block(s, nr);
+	if (!bmbh)
+		return;
+
+	reiserfs_prepare_for_journal(s, bmbh, 1);
+
+	/* clear bit for the given block in bit map */
+	if (!reiserfs_test_and_clear_le_bit(offset, bmbh->b_data)) {
+		reiserfs_warning(s, "vs-4080: reiserfs_free_block: "
+				 "free_block (%s:%lu)[dev:blocknr]: bit already cleared",
+				 reiserfs_bdevname(s), block);
+	}
+	apbi[nr].free_count++;
+	journal_mark_dirty(th, s, bmbh);
+	brelse(bmbh);
+
+	reiserfs_prepare_for_journal(s, sbh, 1);
+	/* update super block */
+	set_sb_free_blocks(rs, sb_free_blocks(rs) + 1);
+
+	journal_mark_dirty(th, s, sbh);
+	if (for_unformatted)
+		DQUOT_FREE_BLOCK_NODIRTY(inode, 1);
+}
+
+void reiserfs_free_block(struct reiserfs_transaction_handle *th,
+			 struct inode *inode, b_blocknr_t block,
+			 int for_unformatted)
+{
+	struct super_block *s = th->t_super;
+	BUG_ON(!th->t_trans_id);
+
+	RFALSE(!s, "vs-4061: trying to free block on nonexistent device");
+	if (!is_reusable(s, block, 1))
+		return;
+
+	if (block > sb_block_count(REISERFS_SB(s)->s_rs)) {
+		reiserfs_panic(th->t_super, "bitmap-4072",
+			       "Trying to free block outside file system "
+			       "boundaries (%lu > %lu)",
+			       block, sb_block_count(REISERFS_SB(s)->s_rs));
+		return;
+	}
+	/* mark it before we clear it, just in case */
+	journal_mark_freed(th, s, block);
+	_reiserfs_free_block(th, inode, block, for_unformatted);
+}
+
+/* preallocated blocks don't need to be run through journal_mark_freed */
+static void reiserfs_free_prealloc_block(struct reiserfs_transaction_handle *th,
+					 struct inode *inode, b_blocknr_t block)
+{
+	BUG_ON(!th->t_trans_id);
+	RFALSE(!th->t_super,
+	       "vs-4060: trying to free block on nonexistent device");
+	if (!is_reusable(th->t_super, block, 1))
+		return;
+	_reiserfs_free_block(th, inode, block, 1);
+}
+
+static void __discard_prealloc(struct reiserfs_transaction_handle *th,
+			       struct reiserfs_inode_info *ei)
+{
+	unsigned long save = ei->i_prealloc_block;
+	int dirty = 0;
+	struct inode *inode = &ei->vfs_inode;
+	BUG_ON(!th->t_trans_id);
+#ifdef CONFIG_REISERFS_CHECK
+	if (ei->i_prealloc_count < 0)
+		reiserfs_warning(th->t_super,
+				 "zam-4001:%s: inode has negative prealloc blocks count.",
+				 __func__);
+#endif
+	while (ei->i_prealloc_count > 0) {
+		reiserfs_free_prealloc_block(th, inode, ei->i_prealloc_block);
+		ei->i_prealloc_block++;
+		ei->i_prealloc_count--;
+		dirty = 1;
+	}
+	if (dirty)
+		reiserfs_update_sd(th, inode);
+	ei->i_prealloc_block = save;
+	list_del_init(&(ei->i_prealloc_list));
+}
+
+/* FIXME: It should be inline function */
+void reiserfs_discard_prealloc(struct reiserfs_transaction_handle *th,
+			       struct inode *inode)
+{
+	struct reiserfs_inode_info *ei = REISERFS_I(inode);
+	BUG_ON(!th->t_trans_id);
+	if (ei->i_prealloc_count)
+		__discard_prealloc(th, ei);
+}
+
+void reiserfs_discard_all_prealloc(struct reiserfs_transaction_handle *th)
+{
+	struct list_head *plist = &SB_JOURNAL(th->t_super)->j_prealloc_list;
+
+	BUG_ON(!th->t_trans_id);
+
+	while (!list_empty(plist)) {
+		struct reiserfs_inode_info *ei;
+		ei = list_entry(plist->next, struct reiserfs_inode_info,
+				i_prealloc_list);
+#ifdef CONFIG_REISERFS_CHECK
+		if (!ei->i_prealloc_count) {
+			reiserfs_warning(th->t_super,
+					 "zam-4001:%s: inode is in prealloc list but has no preallocated blocks.",
+					 __func__);
+		}
+#endif
+		__discard_prealloc(th, ei);
+	}
+}
+
+void reiserfs_init_alloc_options(struct super_block *s)
+{
+	set_bit(_ALLOC_skip_busy, &SB_ALLOC_OPTS(s));
+	set_bit(_ALLOC_dirid_groups, &SB_ALLOC_OPTS(s));
+	set_bit(_ALLOC_packing_groups, &SB_ALLOC_OPTS(s));
+}
+
+/* block allocator related options are parsed here */
+int reiserfs_parse_alloc_options(struct super_block *s, char *options)
+{
+	char *this_char, *value;
+
+	REISERFS_SB(s)->s_alloc_options.bits = 0;	/* clear default settings */
+
+	while ((this_char = strsep(&options, ":")) != NULL) {
+		if ((value = strchr(this_char, '=')) != NULL)
+			*value++ = 0;
+
+		if (!strcmp(this_char, "concentrating_formatted_nodes")) {
+			int temp;
+			SET_OPTION(concentrating_formatted_nodes);
+			temp = (value
+				&& *value) ? simple_strtoul(value, &value,
+							    0) : 10;
+			if (temp <= 0 || temp > 100) {
+				REISERFS_SB(s)->s_alloc_options.border = 10;
+			} else {
+				REISERFS_SB(s)->s_alloc_options.border =
+				    100 / temp;
+			}
+			continue;
+		}
+		if (!strcmp(this_char, "displacing_large_files")) {
+			SET_OPTION(displacing_large_files);
+			REISERFS_SB(s)->s_alloc_options.large_file_size =
+			    (value
+			     && *value) ? simple_strtoul(value, &value, 0) : 16;
+			continue;
+		}
+		if (!strcmp(this_char, "displacing_new_packing_localities")) {
+			SET_OPTION(displacing_new_packing_localities);
+			continue;
+		};
+
+		if (!strcmp(this_char, "old_hashed_relocation")) {
+			SET_OPTION(old_hashed_relocation);
+			continue;
+		}
+
+		if (!strcmp(this_char, "new_hashed_relocation")) {
+			SET_OPTION(new_hashed_relocation);
+			continue;
+		}
+
+		if (!strcmp(this_char, "dirid_groups")) {
+			SET_OPTION(dirid_groups);
+			continue;
+		}
+		if (!strcmp(this_char, "oid_groups")) {
+			SET_OPTION(oid_groups);
+			continue;
+		}
+		if (!strcmp(this_char, "packing_groups")) {
+			SET_OPTION(packing_groups);
+			continue;
+		}
+		if (!strcmp(this_char, "hashed_formatted_nodes")) {
+			SET_OPTION(hashed_formatted_nodes);
+			continue;
+		}
+
+		if (!strcmp(this_char, "skip_busy")) {
+			SET_OPTION(skip_busy);
+			continue;
+		}
+
+		if (!strcmp(this_char, "hundredth_slices")) {
+			SET_OPTION(hundredth_slices);
+			continue;
+		}
+
+		if (!strcmp(this_char, "old_way")) {
+			SET_OPTION(old_way);
+			continue;
+		}
+
+		if (!strcmp(this_char, "displace_based_on_dirid")) {
+			SET_OPTION(displace_based_on_dirid);
+			continue;
+		}
+
+		if (!strcmp(this_char, "preallocmin")) {
+			REISERFS_SB(s)->s_alloc_options.preallocmin =
+			    (value
+			     && *value) ? simple_strtoul(value, &value, 0) : 4;
+			continue;
+		}
+
+		if (!strcmp(this_char, "preallocsize")) {
+			REISERFS_SB(s)->s_alloc_options.preallocsize =
+			    (value
+			     && *value) ? simple_strtoul(value, &value,
+							 0) :
+			    PREALLOCATION_SIZE;
+			continue;
+		}
+
+		reiserfs_warning(s, "zam-4001: %s : unknown option - %s",
+				 __func__, this_char);
+		return 1;
+	}
+
+	reiserfs_warning(s, "allocator options = [%08x]\n", SB_ALLOC_OPTS(s));
+	return 0;
+}
+
+static inline void new_hashed_relocation(reiserfs_blocknr_hint_t * hint)
+{
+	char *hash_in;
+	if (hint->formatted_node) {
+		hash_in = (char *)&hint->key.k_dir_id;
+	} else {
+		if (!hint->inode) {
+			//hint->search_start = hint->beg;
+			hash_in = (char *)&hint->key.k_dir_id;
+		} else
+		    if (TEST_OPTION(displace_based_on_dirid, hint->th->t_super))
+			hash_in = (char *)(&INODE_PKEY(hint->inode)->k_dir_id);
+		else
+			hash_in =
+			    (char *)(&INODE_PKEY(hint->inode)->k_objectid);
+	}
+
+	hint->search_start =
+	    hint->beg + keyed_hash(hash_in, 4) % (hint->end - hint->beg);
+}
+
+/*
+ * Relocation based on dirid, hashing them into a given bitmap block
+ * files. Formatted nodes are unaffected, a separate policy covers them
+ */
+static void dirid_groups(reiserfs_blocknr_hint_t * hint)
+{
+	unsigned long hash;
+	__u32 dirid = 0;
+	int bm = 0;
+	struct super_block *sb = hint->th->t_super;
+	if (hint->inode)
+		dirid = le32_to_cpu(INODE_PKEY(hint->inode)->k_dir_id);
+	else if (hint->formatted_node)
+		dirid = hint->key.k_dir_id;
+
+	if (dirid) {
+		bm = bmap_hash_id(sb, dirid);
+		hash = bm * (sb->s_blocksize << 3);
+		/* give a portion of the block group to metadata */
+		if (hint->inode)
+			hash += sb->s_blocksize / 2;
+		hint->search_start = hash;
+	}
+}
+
+/*
+ * Relocation based on oid, hashing them into a given bitmap block
+ * files. Formatted nodes are unaffected, a separate policy covers them
+ */
+static void oid_groups(reiserfs_blocknr_hint_t * hint)
+{
+	if (hint->inode) {
+		unsigned long hash;
+		__u32 oid;
+		__u32 dirid;
+		int bm;
+
+		dirid = le32_to_cpu(INODE_PKEY(hint->inode)->k_dir_id);
+
+		/* keep the root dir and it's first set of subdirs close to
+		 * the start of the disk
+		 */
+		if (dirid <= 2)
+			hash = (hint->inode->i_sb->s_blocksize << 3);
+		else {
+			oid = le32_to_cpu(INODE_PKEY(hint->inode)->k_objectid);
+			bm = bmap_hash_id(hint->inode->i_sb, oid);
+			hash = bm * (hint->inode->i_sb->s_blocksize << 3);
+		}
+		hint->search_start = hash;
+	}
+}
+
+/* returns 1 if it finds an indirect item and gets valid hint info
+ * from it, otherwise 0
+ */
+static int get_left_neighbor(reiserfs_blocknr_hint_t * hint)
+{
+	struct treepath *path;
+	struct buffer_head *bh;
+	struct item_head *ih;
+	int pos_in_item;
+	__le32 *item;
+	int ret = 0;
+
+	if (!hint->path)	/* reiserfs code can call this function w/o pointer to path
+				 * structure supplied; then we rely on supplied search_start */
+		return 0;
+
+	path = hint->path;
+	bh = get_last_bh(path);
+	RFALSE(!bh, "green-4002: Illegal path specified to get_left_neighbor");
+	ih = get_ih(path);
+	pos_in_item = path->pos_in_item;
+	item = get_item(path);
+
+	hint->search_start = bh->b_blocknr;
+
+	if (!hint->formatted_node && is_indirect_le_ih(ih)) {
+		/* for indirect item: go to left and look for the first non-hole entry
+		   in the indirect item */
+		if (pos_in_item == I_UNFM_NUM(ih))
+			pos_in_item--;
+//          pos_in_item = I_UNFM_NUM (ih) - 1;
+		while (pos_in_item >= 0) {
+			int t = get_block_num(item, pos_in_item);
+			if (t) {
+				hint->search_start = t;
+				ret = 1;
+				break;
+			}
+			pos_in_item--;
+		}
+	}
+
+	/* does result value fit into specified region? */
+	return ret;
+}
+
+/* should be, if formatted node, then try to put on first part of the device
+   specified as number of percent with mount option device, else try to put
+   on last of device.  This is not to say it is good code to do so,
+   but the effect should be measured.  */
+static inline void set_border_in_hint(struct super_block *s,
+				      reiserfs_blocknr_hint_t * hint)
+{
+	b_blocknr_t border =
+	    SB_BLOCK_COUNT(s) / REISERFS_SB(s)->s_alloc_options.border;
+
+	if (hint->formatted_node)
+		hint->end = border - 1;
+	else
+		hint->beg = border;
+}
+
+static inline void displace_large_file(reiserfs_blocknr_hint_t * hint)
+{
+	if (TEST_OPTION(displace_based_on_dirid, hint->th->t_super))
+		hint->search_start =
+		    hint->beg +
+		    keyed_hash((char *)(&INODE_PKEY(hint->inode)->k_dir_id),
+			       4) % (hint->end - hint->beg);
+	else
+		hint->search_start =
+		    hint->beg +
+		    keyed_hash((char *)(&INODE_PKEY(hint->inode)->k_objectid),
+			       4) % (hint->end - hint->beg);
+}
+
+static inline void hash_formatted_node(reiserfs_blocknr_hint_t * hint)
+{
+	char *hash_in;
+
+	if (!hint->inode)
+		hash_in = (char *)&hint->key.k_dir_id;
+	else if (TEST_OPTION(displace_based_on_dirid, hint->th->t_super))
+		hash_in = (char *)(&INODE_PKEY(hint->inode)->k_dir_id);
+	else
+		hash_in = (char *)(&INODE_PKEY(hint->inode)->k_objectid);
+
+	hint->search_start =
+	    hint->beg + keyed_hash(hash_in, 4) % (hint->end - hint->beg);
+}
+
+static inline int
+this_blocknr_allocation_would_make_it_a_large_file(reiserfs_blocknr_hint_t *
+						   hint)
+{
+	return hint->block ==
+	    REISERFS_SB(hint->th->t_super)->s_alloc_options.large_file_size;
+}
+
+#ifdef DISPLACE_NEW_PACKING_LOCALITIES
+static inline void displace_new_packing_locality(reiserfs_blocknr_hint_t * hint)
+{
+	struct in_core_key *key = &hint->key;
+
+	hint->th->displace_new_blocks = 0;
+	hint->search_start =
+	    hint->beg + keyed_hash((char *)(&key->k_objectid),
+				   4) % (hint->end - hint->beg);
+}
+#endif
+
+static inline int old_hashed_relocation(reiserfs_blocknr_hint_t * hint)
+{
+	b_blocknr_t border;
+	u32 hash_in;
+
+	if (hint->formatted_node || hint->inode == NULL) {
+		return 0;
+	}
+
+	hash_in = le32_to_cpu((INODE_PKEY(hint->inode))->k_dir_id);
+	border =
+	    hint->beg + (u32) keyed_hash(((char *)(&hash_in)),
+					 4) % (hint->end - hint->beg - 1);
+	if (border > hint->search_start)
+		hint->search_start = border;
+
+	return 1;
+}
+
+static inline int old_way(reiserfs_blocknr_hint_t * hint)
+{
+	b_blocknr_t border;
+
+	if (hint->formatted_node || hint->inode == NULL) {
+		return 0;
+	}
+
+	border =
+	    hint->beg +
+	    le32_to_cpu(INODE_PKEY(hint->inode)->k_dir_id) % (hint->end -
+							      hint->beg);
+	if (border > hint->search_start)
+		hint->search_start = border;
+
+	return 1;
+}
+
+static inline void hundredth_slices(reiserfs_blocknr_hint_t * hint)
+{
+	struct in_core_key *key = &hint->key;
+	b_blocknr_t slice_start;
+
+	slice_start =
+	    (keyed_hash((char *)(&key->k_dir_id), 4) % 100) * (hint->end / 100);
+	if (slice_start > hint->search_start
+	    || slice_start + (hint->end / 100) <= hint->search_start) {
+		hint->search_start = slice_start;
+	}
+}
+
+static void determine_search_start(reiserfs_blocknr_hint_t * hint,
+				   int amount_needed)
+{
+	struct super_block *s = hint->th->t_super;
+	int unfm_hint;
+
+	hint->beg = 0;
+	hint->end = SB_BLOCK_COUNT(s) - 1;
+
+	/* This is former border algorithm. Now with tunable border offset */
+	if (concentrating_formatted_nodes(s))
+		set_border_in_hint(s, hint);
+
+#ifdef DISPLACE_NEW_PACKING_LOCALITIES
+	/* whenever we create a new directory, we displace it.  At first we will
+	   hash for location, later we might look for a moderately empty place for
+	   it */
+	if (displacing_new_packing_localities(s)
+	    && hint->th->displace_new_blocks) {
+		displace_new_packing_locality(hint);
+
+		/* we do not continue determine_search_start,
+		 * if new packing locality is being displaced */
+		return;
+	}
+#endif
+
+	/* all persons should feel encouraged to add more special cases here and
+	 * test them */
+
+	if (displacing_large_files(s) && !hint->formatted_node
+	    && this_blocknr_allocation_would_make_it_a_large_file(hint)) {
+		displace_large_file(hint);
+		return;
+	}
+
+	/* if none of our special cases is relevant, use the left neighbor in the
+	   tree order of the new node we are allocating for */
+	if (hint->formatted_node && TEST_OPTION(hashed_formatted_nodes, s)) {
+		hash_formatted_node(hint);
+		return;
+	}
+
+	unfm_hint = get_left_neighbor(hint);
+
+	/* Mimic old block allocator behaviour, that is if VFS allowed for preallocation,
+	   new blocks are displaced based on directory ID. Also, if suggested search_start
+	   is less than last preallocated block, we start searching from it, assuming that
+	   HDD dataflow is faster in forward direction */
+	if (TEST_OPTION(old_way, s)) {
+		if (!hint->formatted_node) {
+			if (!reiserfs_hashed_relocation(s))
+				old_way(hint);
+			else if (!reiserfs_no_unhashed_relocation(s))
+				old_hashed_relocation(hint);
+
+			if (hint->inode
+			    && hint->search_start <
+			    REISERFS_I(hint->inode)->i_prealloc_block)
+				hint->search_start =
+				    REISERFS_I(hint->inode)->i_prealloc_block;
+		}
+		return;
+	}
+
+	/* This is an approach proposed by Hans */
+	if (TEST_OPTION(hundredth_slices, s)
+	    && !(displacing_large_files(s) && !hint->formatted_node)) {
+		hundredth_slices(hint);
+		return;
+	}
+
+	/* old_hashed_relocation only works on unformatted */
+	if (!unfm_hint && !hint->formatted_node &&
+	    TEST_OPTION(old_hashed_relocation, s)) {
+		old_hashed_relocation(hint);
+	}
+	/* new_hashed_relocation works with both formatted/unformatted nodes */
+	if ((!unfm_hint || hint->formatted_node) &&
+	    TEST_OPTION(new_hashed_relocation, s)) {
+		new_hashed_relocation(hint);
+	}
+	/* dirid grouping works only on unformatted nodes */
+	if (!unfm_hint && !hint->formatted_node && TEST_OPTION(dirid_groups, s)) {
+		dirid_groups(hint);
+	}
+#ifdef DISPLACE_NEW_PACKING_LOCALITIES
+	if (hint->formatted_node && TEST_OPTION(dirid_groups, s)) {
+		dirid_groups(hint);
+	}
+#endif
+
+	/* oid grouping works only on unformatted nodes */
+	if (!unfm_hint && !hint->formatted_node && TEST_OPTION(oid_groups, s)) {
+		oid_groups(hint);
+	}
+	return;
+}
+
+static int determine_prealloc_size(reiserfs_blocknr_hint_t * hint)
+{
+	/* make minimum size a mount option and benchmark both ways */
+	/* we preallocate blocks only for regular files, specific size */
+	/* benchmark preallocating always and see what happens */
+
+	hint->prealloc_size = 0;
+
+	if (!hint->formatted_node && hint->preallocate) {
+		if (S_ISREG(hint->inode->i_mode)
+		    && hint->inode->i_size >=
+		    REISERFS_SB(hint->th->t_super)->s_alloc_options.
+		    preallocmin * hint->inode->i_sb->s_blocksize)
+			hint->prealloc_size =
+			    REISERFS_SB(hint->th->t_super)->s_alloc_options.
+			    preallocsize - 1;
+	}
+	return CARRY_ON;
+}
+
+/* XXX I know it could be merged with upper-level function;
+   but may be result function would be too complex. */
+static inline int allocate_without_wrapping_disk(reiserfs_blocknr_hint_t * hint,
+						 b_blocknr_t * new_blocknrs,
+						 b_blocknr_t start,
+						 b_blocknr_t finish, int min,
+						 int amount_needed,
+						 int prealloc_size)
+{
+	int rest = amount_needed;
+	int nr_allocated;
+
+	while (rest > 0 && start <= finish) {
+		nr_allocated = scan_bitmap(hint->th, &start, finish, min,
+					   rest + prealloc_size,
+					   !hint->formatted_node, hint->block);
+
+		if (nr_allocated == 0)	/* no new blocks allocated, return */
+			break;
+
+		/* fill free_blocknrs array first */
+		while (rest > 0 && nr_allocated > 0) {
+			*new_blocknrs++ = start++;
+			rest--;
+			nr_allocated--;
+		}
+
+		/* do we have something to fill prealloc. array also ? */
+		if (nr_allocated > 0) {
+			/* it means prealloc_size was greater that 0 and we do preallocation */
+			list_add(&REISERFS_I(hint->inode)->i_prealloc_list,
+				 &SB_JOURNAL(hint->th->t_super)->
+				 j_prealloc_list);
+			REISERFS_I(hint->inode)->i_prealloc_block = start;
+			REISERFS_I(hint->inode)->i_prealloc_count =
+			    nr_allocated;
+			break;
+		}
+	}
+
+	return (amount_needed - rest);
+}
+
+static inline int blocknrs_and_prealloc_arrays_from_search_start
+    (reiserfs_blocknr_hint_t * hint, b_blocknr_t * new_blocknrs,
+     int amount_needed) {
+	struct super_block *s = hint->th->t_super;
+	b_blocknr_t start = hint->search_start;
+	b_blocknr_t finish = SB_BLOCK_COUNT(s) - 1;
+	int passno = 0;
+	int nr_allocated = 0;
+
+	determine_prealloc_size(hint);
+	if (!hint->formatted_node) {
+		int quota_ret;
+#ifdef REISERQUOTA_DEBUG
+		reiserfs_debug(s, REISERFS_DEBUG_CODE,
+			       "reiserquota: allocating %d blocks id=%u",
+			       amount_needed, hint->inode->i_uid);
+#endif
+		quota_ret =
+		    DQUOT_ALLOC_BLOCK_NODIRTY(hint->inode, amount_needed);
+		if (quota_ret)	/* Quota exceeded? */
+			return QUOTA_EXCEEDED;
+		if (hint->preallocate && hint->prealloc_size) {
+#ifdef REISERQUOTA_DEBUG
+			reiserfs_debug(s, REISERFS_DEBUG_CODE,
+				       "reiserquota: allocating (prealloc) %d blocks id=%u",
+				       hint->prealloc_size, hint->inode->i_uid);
+#endif
+			quota_ret =
+			    DQUOT_PREALLOC_BLOCK_NODIRTY(hint->inode,
+							 hint->prealloc_size);
+			if (quota_ret)
+				hint->preallocate = hint->prealloc_size = 0;
+		}
+		/* for unformatted nodes, force large allocations */
+	}
+
+	do {
+		switch (passno++) {
+		case 0:	/* Search from hint->search_start to end of disk */
+			start = hint->search_start;
+			finish = SB_BLOCK_COUNT(s) - 1;
+			break;
+		case 1:	/* Search from hint->beg to hint->search_start */
+			start = hint->beg;
+			finish = hint->search_start;
+			break;
+		case 2:	/* Last chance: Search from 0 to hint->beg */
+			start = 0;
+			finish = hint->beg;
+			break;
+		default:	/* We've tried searching everywhere, not enough space */
+			/* Free the blocks */
+			if (!hint->formatted_node) {
+#ifdef REISERQUOTA_DEBUG
+				reiserfs_debug(s, REISERFS_DEBUG_CODE,
+					       "reiserquota: freeing (nospace) %d blocks id=%u",
+					       amount_needed +
+					       hint->prealloc_size -
+					       nr_allocated,
+					       hint->inode->i_uid);
+#endif
+				DQUOT_FREE_BLOCK_NODIRTY(hint->inode, amount_needed + hint->prealloc_size - nr_allocated);	/* Free not allocated blocks */
+			}
+			while (nr_allocated--)
+				reiserfs_free_block(hint->th, hint->inode,
+						    new_blocknrs[nr_allocated],
+						    !hint->formatted_node);
+
+			return NO_DISK_SPACE;
+		}
+	} while ((nr_allocated += allocate_without_wrapping_disk(hint,
+								 new_blocknrs +
+								 nr_allocated,
+								 start, finish,
+								 1,
+								 amount_needed -
+								 nr_allocated,
+								 hint->
+								 prealloc_size))
+		 < amount_needed);
+	if (!hint->formatted_node &&
+	    amount_needed + hint->prealloc_size >
+	    nr_allocated + REISERFS_I(hint->inode)->i_prealloc_count) {
+		/* Some of preallocation blocks were not allocated */
+#ifdef REISERQUOTA_DEBUG
+		reiserfs_debug(s, REISERFS_DEBUG_CODE,
+			       "reiserquota: freeing (failed prealloc) %d blocks id=%u",
+			       amount_needed + hint->prealloc_size -
+			       nr_allocated -
+			       REISERFS_I(hint->inode)->i_prealloc_count,
+			       hint->inode->i_uid);
+#endif
+		DQUOT_FREE_BLOCK_NODIRTY(hint->inode, amount_needed +
+					 hint->prealloc_size - nr_allocated -
+					 REISERFS_I(hint->inode)->
+					 i_prealloc_count);
+	}
+
+	return CARRY_ON;
+}
+
+/* grab new blocknrs from preallocated list */
+/* return amount still needed after using them */
+static int use_preallocated_list_if_available(reiserfs_blocknr_hint_t * hint,
+					      b_blocknr_t * new_blocknrs,
+					      int amount_needed)
+{
+	struct inode *inode = hint->inode;
+
+	if (REISERFS_I(inode)->i_prealloc_count > 0) {
+		while (amount_needed) {
+
+			*new_blocknrs++ = REISERFS_I(inode)->i_prealloc_block++;
+			REISERFS_I(inode)->i_prealloc_count--;
+
+			amount_needed--;
+
+			if (REISERFS_I(inode)->i_prealloc_count <= 0) {
+				list_del(&REISERFS_I(inode)->i_prealloc_list);
+				break;
+			}
+		}
+	}
+	/* return amount still needed after using preallocated blocks */
+	return amount_needed;
+}
+
+int reiserfs_allocate_blocknrs(reiserfs_blocknr_hint_t * hint, b_blocknr_t * new_blocknrs, int amount_needed, int reserved_by_us	/* Amount of blocks we have
+																	   already reserved */ )
+{
+	int initial_amount_needed = amount_needed;
+	int ret;
+	struct super_block *s = hint->th->t_super;
+
+	/* Check if there is enough space, taking into account reserved space */
+	if (SB_FREE_BLOCKS(s) - REISERFS_SB(s)->reserved_blocks <
+	    amount_needed - reserved_by_us)
+		return NO_DISK_SPACE;
+	/* should this be if !hint->inode &&  hint->preallocate? */
+	/* do you mean hint->formatted_node can be removed ? - Zam */
+	/* hint->formatted_node cannot be removed because we try to access
+	   inode information here, and there is often no inode assotiated with
+	   metadata allocations - green */
+
+	if (!hint->formatted_node && hint->preallocate) {
+		amount_needed = use_preallocated_list_if_available
+		    (hint, new_blocknrs, amount_needed);
+		if (amount_needed == 0)	/* all blocknrs we need we got from
+					   prealloc. list */
+			return CARRY_ON;
+		new_blocknrs += (initial_amount_needed - amount_needed);
+	}
+
+	/* find search start and save it in hint structure */
+	determine_search_start(hint, amount_needed);
+	if (hint->search_start >= SB_BLOCK_COUNT(s))
+		hint->search_start = SB_BLOCK_COUNT(s) - 1;
+
+	/* allocation itself; fill new_blocknrs and preallocation arrays */
+	ret = blocknrs_and_prealloc_arrays_from_search_start
+	    (hint, new_blocknrs, amount_needed);
+
+	/* we used prealloc. list to fill (partially) new_blocknrs array. If final allocation fails we
+	 * need to return blocks back to prealloc. list or just free them. -- Zam (I chose second
+	 * variant) */
+
+	if (ret != CARRY_ON) {
+		while (amount_needed++ < initial_amount_needed) {
+			reiserfs_free_block(hint->th, hint->inode,
+					    *(--new_blocknrs), 1);
+		}
+	}
+	return ret;
+}
+
+void reiserfs_cache_bitmap_metadata(struct super_block *sb,
+                                    struct buffer_head *bh,
+                                    struct reiserfs_bitmap_info *info)
+{
+	unsigned long *cur = (unsigned long *)(bh->b_data + bh->b_size);
+
+	/* The first bit must ALWAYS be 1 */
+	BUG_ON(!reiserfs_test_le_bit(0, (unsigned long *)bh->b_data));
+
+	info->free_count = 0;
+
+	while (--cur >= (unsigned long *)bh->b_data) {
+		int i;
+
+		/* 0 and ~0 are special, we can optimize for them */
+		if (*cur == 0)
+			info->free_count += BITS_PER_LONG;
+		else if (*cur != ~0L)	/* A mix, investigate */
+			for (i = BITS_PER_LONG - 1; i >= 0; i--)
+				if (!reiserfs_test_le_bit(i, cur))
+					info->free_count++;
+	}
+}
+
+struct buffer_head *reiserfs_read_bitmap_block(struct super_block *sb,
+                                               unsigned int bitmap)
+{
+	b_blocknr_t block = (sb->s_blocksize << 3) * bitmap;
+	struct reiserfs_bitmap_info *info = SB_AP_BITMAP(sb) + bitmap;
+	struct buffer_head *bh;
+
+	/* Way old format filesystems had the bitmaps packed up front.
+	 * I doubt there are any of these left, but just in case... */
+	if (unlikely(test_bit(REISERFS_OLD_FORMAT,
+	                      &(REISERFS_SB(sb)->s_properties))))
+		block = REISERFS_SB(sb)->s_sbh->b_blocknr + 1 + bitmap;
+	else if (bitmap == 0)
+		block = (REISERFS_DISK_OFFSET_IN_BYTES >> sb->s_blocksize_bits) + 1;
+
+	bh = sb_bread(sb, block);
+	if (bh == NULL)
+		reiserfs_warning(sb, "sh-2029: %s: bitmap block (#%u) "
+		                 "reading failed", __func__, block);
+	else {
+		if (buffer_locked(bh)) {
+			PROC_INFO_INC(sb, scan_bitmap.wait);
+			__wait_on_buffer(bh);
+		}
+		BUG_ON(!buffer_uptodate(bh));
+		BUG_ON(atomic_read(&bh->b_count) == 0);
+
+		if (info->free_count == UINT_MAX)
+			reiserfs_cache_bitmap_metadata(sb, bh, info);
+	}
+
+	return bh;
+}
+
+int reiserfs_init_bitmap_cache(struct super_block *sb)
+{
+	struct reiserfs_bitmap_info *bitmap;
+	unsigned int bmap_nr = reiserfs_bmap_count(sb);
+
+	bitmap = vmalloc(sizeof(*bitmap) * bmap_nr);
+	if (bitmap == NULL)
+		return -ENOMEM;
+
+	memset(bitmap, 0xff, sizeof(*bitmap) * bmap_nr);
+
+	SB_AP_BITMAP(sb) = bitmap;
+
+	return 0;
+}
+
+void reiserfs_free_bitmap_cache(struct super_block *sb)
+{
+	if (SB_AP_BITMAP(sb)) {
+		vfree(SB_AP_BITMAP(sb));
+		SB_AP_BITMAP(sb) = NULL;
+	}
+}
diff --git a/fs/reiserfs/dir.c b/fs/reiserfs/dir.c
new file mode 100644
index 0000000..e6b03d2
--- /dev/null
+++ b/fs/reiserfs/dir.c
@@ -0,0 +1,302 @@
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ */
+
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/stat.h>
+#include <linux/buffer_head.h>
+#include <asm/uaccess.h>
+
+extern const struct reiserfs_key MIN_KEY;
+
+static int reiserfs_readdir(struct file *, void *, filldir_t);
+static int reiserfs_dir_fsync(struct file *filp, struct dentry *dentry,
+			      int datasync);
+
+const struct file_operations reiserfs_dir_operations = {
+	.read = generic_read_dir,
+	.readdir = reiserfs_readdir,
+	.fsync = reiserfs_dir_fsync,
+	.ioctl = reiserfs_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl = reiserfs_compat_ioctl,
+#endif
+};
+
+static int reiserfs_dir_fsync(struct file *filp, struct dentry *dentry,
+			      int datasync)
+{
+	struct inode *inode = dentry->d_inode;
+	int err;
+	reiserfs_write_lock(inode->i_sb);
+	err = reiserfs_commit_for_inode(inode);
+	reiserfs_write_unlock(inode->i_sb);
+	if (err < 0)
+		return err;
+	return 0;
+}
+
+#define store_ih(where,what) copy_item_head (where, what)
+
+//
+static int reiserfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
+{
+	struct inode *inode = filp->f_path.dentry->d_inode;
+	struct cpu_key pos_key;	/* key of current position in the directory (key of directory entry) */
+	INITIALIZE_PATH(path_to_entry);
+	struct buffer_head *bh;
+	int item_num, entry_num;
+	const struct reiserfs_key *rkey;
+	struct item_head *ih, tmp_ih;
+	int search_res;
+	char *local_buf;
+	loff_t next_pos;
+	char small_buf[32];	/* avoid kmalloc if we can */
+	struct reiserfs_dir_entry de;
+	int ret = 0;
+
+	reiserfs_write_lock(inode->i_sb);
+
+	reiserfs_check_lock_depth(inode->i_sb, "readdir");
+
+	/* form key for search the next directory entry using f_pos field of
+	   file structure */
+	make_cpu_key(&pos_key, inode,
+		     (filp->f_pos) ? (filp->f_pos) : DOT_OFFSET, TYPE_DIRENTRY,
+		     3);
+	next_pos = cpu_key_k_offset(&pos_key);
+
+	/*  reiserfs_warning (inode->i_sb, "reiserfs_readdir 1: f_pos = %Ld", filp->f_pos); */
+
+	path_to_entry.reada = PATH_READA;
+	while (1) {
+	      research:
+		/* search the directory item, containing entry with specified key */
+		search_res =
+		    search_by_entry_key(inode->i_sb, &pos_key, &path_to_entry,
+					&de);
+		if (search_res == IO_ERROR) {
+			// FIXME: we could just skip part of directory which could
+			// not be read
+			ret = -EIO;
+			goto out;
+		}
+		entry_num = de.de_entry_num;
+		bh = de.de_bh;
+		item_num = de.de_item_num;
+		ih = de.de_ih;
+		store_ih(&tmp_ih, ih);
+
+		/* we must have found item, that is item of this directory, */
+		RFALSE(COMP_SHORT_KEYS(&(ih->ih_key), &pos_key),
+		       "vs-9000: found item %h does not match to dir we readdir %K",
+		       ih, &pos_key);
+		RFALSE(item_num > B_NR_ITEMS(bh) - 1,
+		       "vs-9005 item_num == %d, item amount == %d",
+		       item_num, B_NR_ITEMS(bh));
+
+		/* and entry must be not more than number of entries in the item */
+		RFALSE(I_ENTRY_COUNT(ih) < entry_num,
+		       "vs-9010: entry number is too big %d (%d)",
+		       entry_num, I_ENTRY_COUNT(ih));
+
+		if (search_res == POSITION_FOUND
+		    || entry_num < I_ENTRY_COUNT(ih)) {
+			/* go through all entries in the directory item beginning from the entry, that has been found */
+			struct reiserfs_de_head *deh =
+			    B_I_DEH(bh, ih) + entry_num;
+
+			for (; entry_num < I_ENTRY_COUNT(ih);
+			     entry_num++, deh++) {
+				int d_reclen;
+				char *d_name;
+				off_t d_off;
+				ino_t d_ino;
+
+				if (!de_visible(deh))
+					/* it is hidden entry */
+					continue;
+				d_reclen = entry_length(bh, ih, entry_num);
+				d_name = B_I_DEH_ENTRY_FILE_NAME(bh, ih, deh);
+
+				if (d_reclen <= 0 ||
+				    d_name + d_reclen > bh->b_data + bh->b_size) {
+					/* There is corrupted data in entry,
+					 * We'd better stop here */
+					pathrelse(&path_to_entry);
+					ret = -EIO;
+					goto out;
+				}
+
+				if (!d_name[d_reclen - 1])
+					d_reclen = strlen(d_name);
+
+				if (d_reclen >
+				    REISERFS_MAX_NAME(inode->i_sb->
+						      s_blocksize)) {
+					/* too big to send back to VFS */
+					continue;
+				}
+
+				/* Ignore the .reiserfs_priv entry */
+				if (reiserfs_xattrs(inode->i_sb) &&
+				    !old_format_only(inode->i_sb) &&
+				    filp->f_path.dentry == inode->i_sb->s_root &&
+				    REISERFS_SB(inode->i_sb)->priv_root &&
+				    REISERFS_SB(inode->i_sb)->priv_root->d_inode
+				    && deh_objectid(deh) ==
+				    le32_to_cpu(INODE_PKEY
+						(REISERFS_SB(inode->i_sb)->
+						 priv_root->d_inode)->
+						k_objectid)) {
+					continue;
+				}
+
+				d_off = deh_offset(deh);
+				filp->f_pos = d_off;
+				d_ino = deh_objectid(deh);
+				if (d_reclen <= 32) {
+					local_buf = small_buf;
+				} else {
+					local_buf = kmalloc(d_reclen,
+							    GFP_NOFS);
+					if (!local_buf) {
+						pathrelse(&path_to_entry);
+						ret = -ENOMEM;
+						goto out;
+					}
+					if (item_moved(&tmp_ih, &path_to_entry)) {
+						kfree(local_buf);
+						goto research;
+					}
+				}
+				// Note, that we copy name to user space via temporary
+				// buffer (local_buf) because filldir will block if
+				// user space buffer is swapped out. At that time
+				// entry can move to somewhere else
+				memcpy(local_buf, d_name, d_reclen);
+				if (filldir
+				    (dirent, local_buf, d_reclen, d_off, d_ino,
+				     DT_UNKNOWN) < 0) {
+					if (local_buf != small_buf) {
+						kfree(local_buf);
+					}
+					goto end;
+				}
+				if (local_buf != small_buf) {
+					kfree(local_buf);
+				}
+				// next entry should be looked for with such offset
+				next_pos = deh_offset(deh) + 1;
+
+				if (item_moved(&tmp_ih, &path_to_entry)) {
+					goto research;
+				}
+			}	/* for */
+		}
+
+		if (item_num != B_NR_ITEMS(bh) - 1)
+			// end of directory has been reached
+			goto end;
+
+		/* item we went through is last item of node. Using right
+		   delimiting key check is it directory end */
+		rkey = get_rkey(&path_to_entry, inode->i_sb);
+		if (!comp_le_keys(rkey, &MIN_KEY)) {
+			/* set pos_key to key, that is the smallest and greater
+			   that key of the last entry in the item */
+			set_cpu_key_k_offset(&pos_key, next_pos);
+			continue;
+		}
+
+		if (COMP_SHORT_KEYS(rkey, &pos_key)) {
+			// end of directory has been reached
+			goto end;
+		}
+
+		/* directory continues in the right neighboring block */
+		set_cpu_key_k_offset(&pos_key,
+				     le_key_k_offset(KEY_FORMAT_3_5, rkey));
+
+	}			/* while */
+
+      end:
+	filp->f_pos = next_pos;
+	pathrelse(&path_to_entry);
+	reiserfs_check_path(&path_to_entry);
+      out:
+	reiserfs_write_unlock(inode->i_sb);
+	return ret;
+}
+
+/* compose directory item containing "." and ".." entries (entries are
+   not aligned to 4 byte boundary) */
+/* the last four params are LE */
+void make_empty_dir_item_v1(char *body, __le32 dirid, __le32 objid,
+			    __le32 par_dirid, __le32 par_objid)
+{
+	struct reiserfs_de_head *deh;
+
+	memset(body, 0, EMPTY_DIR_SIZE_V1);
+	deh = (struct reiserfs_de_head *)body;
+
+	/* direntry header of "." */
+	put_deh_offset(&(deh[0]), DOT_OFFSET);
+	/* these two are from make_le_item_head, and are are LE */
+	deh[0].deh_dir_id = dirid;
+	deh[0].deh_objectid = objid;
+	deh[0].deh_state = 0;	/* Endian safe if 0 */
+	put_deh_location(&(deh[0]), EMPTY_DIR_SIZE_V1 - strlen("."));
+	mark_de_visible(&(deh[0]));
+
+	/* direntry header of ".." */
+	put_deh_offset(&(deh[1]), DOT_DOT_OFFSET);
+	/* key of ".." for the root directory */
+	/* these two are from the inode, and are are LE */
+	deh[1].deh_dir_id = par_dirid;
+	deh[1].deh_objectid = par_objid;
+	deh[1].deh_state = 0;	/* Endian safe if 0 */
+	put_deh_location(&(deh[1]), deh_location(&(deh[0])) - strlen(".."));
+	mark_de_visible(&(deh[1]));
+
+	/* copy ".." and "." */
+	memcpy(body + deh_location(&(deh[0])), ".", 1);
+	memcpy(body + deh_location(&(deh[1])), "..", 2);
+}
+
+/* compose directory item containing "." and ".." entries */
+void make_empty_dir_item(char *body, __le32 dirid, __le32 objid,
+			 __le32 par_dirid, __le32 par_objid)
+{
+	struct reiserfs_de_head *deh;
+
+	memset(body, 0, EMPTY_DIR_SIZE);
+	deh = (struct reiserfs_de_head *)body;
+
+	/* direntry header of "." */
+	put_deh_offset(&(deh[0]), DOT_OFFSET);
+	/* these two are from make_le_item_head, and are are LE */
+	deh[0].deh_dir_id = dirid;
+	deh[0].deh_objectid = objid;
+	deh[0].deh_state = 0;	/* Endian safe if 0 */
+	put_deh_location(&(deh[0]), EMPTY_DIR_SIZE - ROUND_UP(strlen(".")));
+	mark_de_visible(&(deh[0]));
+
+	/* direntry header of ".." */
+	put_deh_offset(&(deh[1]), DOT_DOT_OFFSET);
+	/* key of ".." for the root directory */
+	/* these two are from the inode, and are are LE */
+	deh[1].deh_dir_id = par_dirid;
+	deh[1].deh_objectid = par_objid;
+	deh[1].deh_state = 0;	/* Endian safe if 0 */
+	put_deh_location(&(deh[1]),
+			 deh_location(&(deh[0])) - ROUND_UP(strlen("..")));
+	mark_de_visible(&(deh[1]));
+
+	/* copy ".." and "." */
+	memcpy(body + deh_location(&(deh[0])), ".", 1);
+	memcpy(body + deh_location(&(deh[1])), "..", 2);
+}
diff --git a/fs/reiserfs/do_balan.c b/fs/reiserfs/do_balan.c
new file mode 100644
index 0000000..2f87f5b
--- /dev/null
+++ b/fs/reiserfs/do_balan.c
@@ -0,0 +1,2137 @@
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ */
+
+/* Now we have all buffers that must be used in balancing of the tree 	*/
+/* Further calculations can not cause schedule(), and thus the buffer 	*/
+/* tree will be stable until the balancing will be finished 		*/
+/* balance the tree according to the analysis made before,		*/
+/* and using buffers obtained after all above.				*/
+
+/**
+ ** balance_leaf_when_delete
+ ** balance_leaf
+ ** do_balance
+ **
+ **/
+
+#include <asm/uaccess.h>
+#include <linux/time.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/buffer_head.h>
+#include <linux/kernel.h>
+
+#ifdef CONFIG_REISERFS_CHECK
+
+struct tree_balance *cur_tb = NULL;	/* detects whether more than one
+					   copy of tb exists as a means
+					   of checking whether schedule
+					   is interrupting do_balance */
+#endif
+
+inline void do_balance_mark_leaf_dirty(struct tree_balance *tb,
+				       struct buffer_head *bh, int flag)
+{
+	journal_mark_dirty(tb->transaction_handle,
+			   tb->transaction_handle->t_super, bh);
+}
+
+#define do_balance_mark_internal_dirty do_balance_mark_leaf_dirty
+#define do_balance_mark_sb_dirty do_balance_mark_leaf_dirty
+
+/* summary: 
+ if deleting something ( tb->insert_size[0] < 0 )
+   return(balance_leaf_when_delete()); (flag d handled here)
+ else
+   if lnum is larger than 0 we put items into the left node
+   if rnum is larger than 0 we put items into the right node
+   if snum1 is larger than 0 we put items into the new node s1
+   if snum2 is larger than 0 we put items into the new node s2 
+Note that all *num* count new items being created.
+
+It would be easier to read balance_leaf() if each of these summary
+lines was a separate procedure rather than being inlined.  I think
+that there are many passages here and in balance_leaf_when_delete() in
+which two calls to one procedure can replace two passages, and it
+might save cache space and improve software maintenance costs to do so.  
+
+Vladimir made the perceptive comment that we should offload most of
+the decision making in this function into fix_nodes/check_balance, and
+then create some sort of structure in tb that says what actions should
+be performed by do_balance.
+
+-Hans */
+
+/* Balance leaf node in case of delete or cut: insert_size[0] < 0
+ *
+ * lnum, rnum can have values >= -1
+ *	-1 means that the neighbor must be joined with S
+ *	 0 means that nothing should be done with the neighbor
+ *	>0 means to shift entirely or partly the specified number of items to the neighbor
+ */
+static int balance_leaf_when_delete(struct tree_balance *tb, int flag)
+{
+	struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
+	int item_pos = PATH_LAST_POSITION(tb->tb_path);
+	int pos_in_item = tb->tb_path->pos_in_item;
+	struct buffer_info bi;
+	int n;
+	struct item_head *ih;
+
+	RFALSE(tb->FR[0] && B_LEVEL(tb->FR[0]) != DISK_LEAF_NODE_LEVEL + 1,
+	       "vs- 12000: level: wrong FR %z", tb->FR[0]);
+	RFALSE(tb->blknum[0] > 1,
+	       "PAP-12005: tb->blknum == %d, can not be > 1", tb->blknum[0]);
+	RFALSE(!tb->blknum[0] && !PATH_H_PPARENT(tb->tb_path, 0),
+	       "PAP-12010: tree can not be empty");
+
+	ih = B_N_PITEM_HEAD(tbS0, item_pos);
+
+	/* Delete or truncate the item */
+
+	switch (flag) {
+	case M_DELETE:		/* delete item in S[0] */
+
+		RFALSE(ih_item_len(ih) + IH_SIZE != -tb->insert_size[0],
+		       "vs-12013: mode Delete, insert size %d, ih to be deleted %h",
+		       -tb->insert_size[0], ih);
+
+		bi.tb = tb;
+		bi.bi_bh = tbS0;
+		bi.bi_parent = PATH_H_PPARENT(tb->tb_path, 0);
+		bi.bi_position = PATH_H_POSITION(tb->tb_path, 1);
+		leaf_delete_items(&bi, 0, item_pos, 1, -1);
+
+		if (!item_pos && tb->CFL[0]) {
+			if (B_NR_ITEMS(tbS0)) {
+				replace_key(tb, tb->CFL[0], tb->lkey[0], tbS0,
+					    0);
+			} else {
+				if (!PATH_H_POSITION(tb->tb_path, 1))
+					replace_key(tb, tb->CFL[0], tb->lkey[0],
+						    PATH_H_PPARENT(tb->tb_path,
+								   0), 0);
+			}
+		}
+
+		RFALSE(!item_pos && !tb->CFL[0],
+		       "PAP-12020: tb->CFL[0]==%p, tb->L[0]==%p", tb->CFL[0],
+		       tb->L[0]);
+
+		break;
+
+	case M_CUT:{		/* cut item in S[0] */
+			bi.tb = tb;
+			bi.bi_bh = tbS0;
+			bi.bi_parent = PATH_H_PPARENT(tb->tb_path, 0);
+			bi.bi_position = PATH_H_POSITION(tb->tb_path, 1);
+			if (is_direntry_le_ih(ih)) {
+
+				/* UFS unlink semantics are such that you can only delete one directory entry at a time. */
+				/* when we cut a directory tb->insert_size[0] means number of entries to be cut (always 1) */
+				tb->insert_size[0] = -1;
+				leaf_cut_from_buffer(&bi, item_pos, pos_in_item,
+						     -tb->insert_size[0]);
+
+				RFALSE(!item_pos && !pos_in_item && !tb->CFL[0],
+				       "PAP-12030: can not change delimiting key. CFL[0]=%p",
+				       tb->CFL[0]);
+
+				if (!item_pos && !pos_in_item && tb->CFL[0]) {
+					replace_key(tb, tb->CFL[0], tb->lkey[0],
+						    tbS0, 0);
+				}
+			} else {
+				leaf_cut_from_buffer(&bi, item_pos, pos_in_item,
+						     -tb->insert_size[0]);
+
+				RFALSE(!ih_item_len(ih),
+				       "PAP-12035: cut must leave non-zero dynamic length of item");
+			}
+			break;
+		}
+
+	default:
+		print_cur_tb("12040");
+		reiserfs_panic(tb->tb_sb,
+			       "PAP-12040: balance_leaf_when_delete: unexpectable mode: %s(%d)",
+			       (flag ==
+				M_PASTE) ? "PASTE" : ((flag ==
+						       M_INSERT) ? "INSERT" :
+						      "UNKNOWN"), flag);
+	}
+
+	/* the rule is that no shifting occurs unless by shifting a node can be freed */
+	n = B_NR_ITEMS(tbS0);
+	if (tb->lnum[0]) {	/* L[0] takes part in balancing */
+		if (tb->lnum[0] == -1) {	/* L[0] must be joined with S[0] */
+			if (tb->rnum[0] == -1) {	/* R[0] must be also joined with S[0] */
+				if (tb->FR[0] == PATH_H_PPARENT(tb->tb_path, 0)) {
+					/* all contents of all the 3 buffers will be in L[0] */
+					if (PATH_H_POSITION(tb->tb_path, 1) == 0
+					    && 1 < B_NR_ITEMS(tb->FR[0]))
+						replace_key(tb, tb->CFL[0],
+							    tb->lkey[0],
+							    tb->FR[0], 1);
+
+					leaf_move_items(LEAF_FROM_S_TO_L, tb, n,
+							-1, NULL);
+					leaf_move_items(LEAF_FROM_R_TO_L, tb,
+							B_NR_ITEMS(tb->R[0]),
+							-1, NULL);
+
+					reiserfs_invalidate_buffer(tb, tbS0);
+					reiserfs_invalidate_buffer(tb,
+								   tb->R[0]);
+
+					return 0;
+				}
+				/* all contents of all the 3 buffers will be in R[0] */
+				leaf_move_items(LEAF_FROM_S_TO_R, tb, n, -1,
+						NULL);
+				leaf_move_items(LEAF_FROM_L_TO_R, tb,
+						B_NR_ITEMS(tb->L[0]), -1, NULL);
+
+				/* right_delimiting_key is correct in R[0] */
+				replace_key(tb, tb->CFR[0], tb->rkey[0],
+					    tb->R[0], 0);
+
+				reiserfs_invalidate_buffer(tb, tbS0);
+				reiserfs_invalidate_buffer(tb, tb->L[0]);
+
+				return -1;
+			}
+
+			RFALSE(tb->rnum[0] != 0,
+			       "PAP-12045: rnum must be 0 (%d)", tb->rnum[0]);
+			/* all contents of L[0] and S[0] will be in L[0] */
+			leaf_shift_left(tb, n, -1);
+
+			reiserfs_invalidate_buffer(tb, tbS0);
+
+			return 0;
+		}
+		/* a part of contents of S[0] will be in L[0] and the rest part of S[0] will be in R[0] */
+
+		RFALSE((tb->lnum[0] + tb->rnum[0] < n) ||
+		       (tb->lnum[0] + tb->rnum[0] > n + 1),
+		       "PAP-12050: rnum(%d) and lnum(%d) and item number(%d) in S[0] are not consistent",
+		       tb->rnum[0], tb->lnum[0], n);
+		RFALSE((tb->lnum[0] + tb->rnum[0] == n) &&
+		       (tb->lbytes != -1 || tb->rbytes != -1),
+		       "PAP-12055: bad rbytes (%d)/lbytes (%d) parameters when items are not split",
+		       tb->rbytes, tb->lbytes);
+		RFALSE((tb->lnum[0] + tb->rnum[0] == n + 1) &&
+		       (tb->lbytes < 1 || tb->rbytes != -1),
+		       "PAP-12060: bad rbytes (%d)/lbytes (%d) parameters when items are split",
+		       tb->rbytes, tb->lbytes);
+
+		leaf_shift_left(tb, tb->lnum[0], tb->lbytes);
+		leaf_shift_right(tb, tb->rnum[0], tb->rbytes);
+
+		reiserfs_invalidate_buffer(tb, tbS0);
+
+		return 0;
+	}
+
+	if (tb->rnum[0] == -1) {
+		/* all contents of R[0] and S[0] will be in R[0] */
+		leaf_shift_right(tb, n, -1);
+		reiserfs_invalidate_buffer(tb, tbS0);
+		return 0;
+	}
+
+	RFALSE(tb->rnum[0],
+	       "PAP-12065: bad rnum parameter must be 0 (%d)", tb->rnum[0]);
+	return 0;
+}
+
+static int balance_leaf(struct tree_balance *tb, struct item_head *ih,	/* item header of inserted item (this is on little endian) */
+			const char *body,	/* body  of inserted item or bytes to paste */
+			int flag,	/* i - insert, d - delete, c - cut, p - paste
+					   (see comment to do_balance) */
+			struct item_head *insert_key,	/* in our processing of one level we sometimes determine what
+							   must be inserted into the next higher level.  This insertion
+							   consists of a key or two keys and their corresponding
+							   pointers */
+			struct buffer_head **insert_ptr	/* inserted node-ptrs for the next level */
+    )
+{
+	struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
+	int item_pos = PATH_LAST_POSITION(tb->tb_path);	/*  index into the array of item headers in S[0] 
+							   of the affected item */
+	struct buffer_info bi;
+	struct buffer_head *S_new[2];	/* new nodes allocated to hold what could not fit into S */
+	int snum[2];		/* number of items that will be placed
+				   into S_new (includes partially shifted
+				   items) */
+	int sbytes[2];		/* if an item is partially shifted into S_new then 
+				   if it is a directory item 
+				   it is the number of entries from the item that are shifted into S_new
+				   else
+				   it is the number of bytes from the item that are shifted into S_new
+				 */
+	int n, i;
+	int ret_val;
+	int pos_in_item;
+	int zeros_num;
+
+	PROC_INFO_INC(tb->tb_sb, balance_at[0]);
+
+	/* Make balance in case insert_size[0] < 0 */
+	if (tb->insert_size[0] < 0)
+		return balance_leaf_when_delete(tb, flag);
+
+	zeros_num = 0;
+	if (flag == M_INSERT && !body)
+		zeros_num = ih_item_len(ih);
+
+	pos_in_item = tb->tb_path->pos_in_item;
+	/* for indirect item pos_in_item is measured in unformatted node
+	   pointers. Recalculate to bytes */
+	if (flag != M_INSERT
+	    && is_indirect_le_ih(B_N_PITEM_HEAD(tbS0, item_pos)))
+		pos_in_item *= UNFM_P_SIZE;
+
+	if (tb->lnum[0] > 0) {
+		/* Shift lnum[0] items from S[0] to the left neighbor L[0] */
+		if (item_pos < tb->lnum[0]) {
+			/* new item or it part falls to L[0], shift it too */
+			n = B_NR_ITEMS(tb->L[0]);
+
+			switch (flag) {
+			case M_INSERT:	/* insert item into L[0] */
+
+				if (item_pos == tb->lnum[0] - 1
+				    && tb->lbytes != -1) {
+					/* part of new item falls into L[0] */
+					int new_item_len;
+					int version;
+
+					ret_val =
+					    leaf_shift_left(tb, tb->lnum[0] - 1,
+							    -1);
+
+					/* Calculate item length to insert to S[0] */
+					new_item_len =
+					    ih_item_len(ih) - tb->lbytes;
+					/* Calculate and check item length to insert to L[0] */
+					put_ih_item_len(ih,
+							ih_item_len(ih) -
+							new_item_len);
+
+					RFALSE(ih_item_len(ih) <= 0,
+					       "PAP-12080: there is nothing to insert into L[0]: ih_item_len=%d",
+					       ih_item_len(ih));
+
+					/* Insert new item into L[0] */
+					bi.tb = tb;
+					bi.bi_bh = tb->L[0];
+					bi.bi_parent = tb->FL[0];
+					bi.bi_position =
+					    get_left_neighbor_position(tb, 0);
+					leaf_insert_into_buf(&bi,
+							     n + item_pos -
+							     ret_val, ih, body,
+							     zeros_num >
+							     ih_item_len(ih) ?
+							     ih_item_len(ih) :
+							     zeros_num);
+
+					version = ih_version(ih);
+
+					/* Calculate key component, item length and body to insert into S[0] */
+					set_le_ih_k_offset(ih,
+							   le_ih_k_offset(ih) +
+							   (tb->
+							    lbytes <<
+							    (is_indirect_le_ih
+							     (ih) ? tb->tb_sb->
+							     s_blocksize_bits -
+							     UNFM_P_SHIFT :
+							     0)));
+
+					put_ih_item_len(ih, new_item_len);
+					if (tb->lbytes > zeros_num) {
+						body +=
+						    (tb->lbytes - zeros_num);
+						zeros_num = 0;
+					} else
+						zeros_num -= tb->lbytes;
+
+					RFALSE(ih_item_len(ih) <= 0,
+					       "PAP-12085: there is nothing to insert into S[0]: ih_item_len=%d",
+					       ih_item_len(ih));
+				} else {
+					/* new item in whole falls into L[0] */
+					/* Shift lnum[0]-1 items to L[0] */
+					ret_val =
+					    leaf_shift_left(tb, tb->lnum[0] - 1,
+							    tb->lbytes);
+					/* Insert new item into L[0] */
+					bi.tb = tb;
+					bi.bi_bh = tb->L[0];
+					bi.bi_parent = tb->FL[0];
+					bi.bi_position =
+					    get_left_neighbor_position(tb, 0);
+					leaf_insert_into_buf(&bi,
+							     n + item_pos -
+							     ret_val, ih, body,
+							     zeros_num);
+					tb->insert_size[0] = 0;
+					zeros_num = 0;
+				}
+				break;
+
+			case M_PASTE:	/* append item in L[0] */
+
+				if (item_pos == tb->lnum[0] - 1
+				    && tb->lbytes != -1) {
+					/* we must shift the part of the appended item */
+					if (is_direntry_le_ih
+					    (B_N_PITEM_HEAD(tbS0, item_pos))) {
+
+						RFALSE(zeros_num,
+						       "PAP-12090: invalid parameter in case of a directory");
+						/* directory item */
+						if (tb->lbytes > pos_in_item) {
+							/* new directory entry falls into L[0] */
+							struct item_head
+							    *pasted;
+							int l_pos_in_item =
+							    pos_in_item;
+
+							/* Shift lnum[0] - 1 items in whole. Shift lbytes - 1 entries from given directory item */
+							ret_val =
+							    leaf_shift_left(tb,
+									    tb->
+									    lnum
+									    [0],
+									    tb->
+									    lbytes
+									    -
+									    1);
+							if (ret_val
+							    && !item_pos) {
+								pasted =
+								    B_N_PITEM_HEAD
+								    (tb->L[0],
+								     B_NR_ITEMS
+								     (tb->
+								      L[0]) -
+								     1);
+								l_pos_in_item +=
+								    I_ENTRY_COUNT
+								    (pasted) -
+								    (tb->
+								     lbytes -
+								     1);
+							}
+
+							/* Append given directory entry to directory item */
+							bi.tb = tb;
+							bi.bi_bh = tb->L[0];
+							bi.bi_parent =
+							    tb->FL[0];
+							bi.bi_position =
+							    get_left_neighbor_position
+							    (tb, 0);
+							leaf_paste_in_buffer
+							    (&bi,
+							     n + item_pos -
+							     ret_val,
+							     l_pos_in_item,
+							     tb->insert_size[0],
+							     body, zeros_num);
+
+							/* previous string prepared space for pasting new entry, following string pastes this entry */
+
+							/* when we have merge directory item, pos_in_item has been changed too */
+
+							/* paste new directory entry. 1 is entry number */
+							leaf_paste_entries(bi.
+									   bi_bh,
+									   n +
+									   item_pos
+									   -
+									   ret_val,
+									   l_pos_in_item,
+									   1,
+									   (struct
+									    reiserfs_de_head
+									    *)
+									   body,
+									   body
+									   +
+									   DEH_SIZE,
+									   tb->
+									   insert_size
+									   [0]
+							    );
+							tb->insert_size[0] = 0;
+						} else {
+							/* new directory item doesn't fall into L[0] */
+							/* Shift lnum[0]-1 items in whole. Shift lbytes directory entries from directory item number lnum[0] */
+							leaf_shift_left(tb,
+									tb->
+									lnum[0],
+									tb->
+									lbytes);
+						}
+						/* Calculate new position to append in item body */
+						pos_in_item -= tb->lbytes;
+					} else {
+						/* regular object */
+						RFALSE(tb->lbytes <= 0,
+						       "PAP-12095: there is nothing to shift to L[0]. lbytes=%d",
+						       tb->lbytes);
+						RFALSE(pos_in_item !=
+						       ih_item_len
+						       (B_N_PITEM_HEAD
+							(tbS0, item_pos)),
+						       "PAP-12100: incorrect position to paste: item_len=%d, pos_in_item=%d",
+						       ih_item_len
+						       (B_N_PITEM_HEAD
+							(tbS0, item_pos)),
+						       pos_in_item);
+
+						if (tb->lbytes >= pos_in_item) {
+							/* appended item will be in L[0] in whole */
+							int l_n;
+
+							/* this bytes number must be appended to the last item of L[h] */
+							l_n =
+							    tb->lbytes -
+							    pos_in_item;
+
+							/* Calculate new insert_size[0] */
+							tb->insert_size[0] -=
+							    l_n;
+
+							RFALSE(tb->
+							       insert_size[0] <=
+							       0,
+							       "PAP-12105: there is nothing to paste into L[0]. insert_size=%d",
+							       tb->
+							       insert_size[0]);
+							ret_val =
+							    leaf_shift_left(tb,
+									    tb->
+									    lnum
+									    [0],
+									    ih_item_len
+									    (B_N_PITEM_HEAD
+									     (tbS0,
+									      item_pos)));
+							/* Append to body of item in L[0] */
+							bi.tb = tb;
+							bi.bi_bh = tb->L[0];
+							bi.bi_parent =
+							    tb->FL[0];
+							bi.bi_position =
+							    get_left_neighbor_position
+							    (tb, 0);
+							leaf_paste_in_buffer
+							    (&bi,
+							     n + item_pos -
+							     ret_val,
+							     ih_item_len
+							     (B_N_PITEM_HEAD
+							      (tb->L[0],
+							       n + item_pos -
+							       ret_val)), l_n,
+							     body,
+							     zeros_num >
+							     l_n ? l_n :
+							     zeros_num);
+							/* 0-th item in S0 can be only of DIRECT type when l_n != 0 */
+							{
+								int version;
+								int temp_l =
+								    l_n;
+
+								RFALSE
+								    (ih_item_len
+								     (B_N_PITEM_HEAD
+								      (tbS0,
+								       0)),
+								     "PAP-12106: item length must be 0");
+								RFALSE
+								    (comp_short_le_keys
+								     (B_N_PKEY
+								      (tbS0, 0),
+								      B_N_PKEY
+								      (tb->L[0],
+								       n +
+								       item_pos
+								       -
+								       ret_val)),
+								     "PAP-12107: items must be of the same file");
+								if (is_indirect_le_ih(B_N_PITEM_HEAD(tb->L[0], n + item_pos - ret_val))) {
+									temp_l =
+									    l_n
+									    <<
+									    (tb->
+									     tb_sb->
+									     s_blocksize_bits
+									     -
+									     UNFM_P_SHIFT);
+								}
+								/* update key of first item in S0 */
+								version =
+								    ih_version
+								    (B_N_PITEM_HEAD
+								     (tbS0, 0));
+								set_le_key_k_offset
+								    (version,
+								     B_N_PKEY
+								     (tbS0, 0),
+								     le_key_k_offset
+								     (version,
+								      B_N_PKEY
+								      (tbS0,
+								       0)) +
+								     temp_l);
+								/* update left delimiting key */
+								set_le_key_k_offset
+								    (version,
+								     B_N_PDELIM_KEY
+								     (tb->
+								      CFL[0],
+								      tb->
+								      lkey[0]),
+								     le_key_k_offset
+								     (version,
+								      B_N_PDELIM_KEY
+								      (tb->
+								       CFL[0],
+								       tb->
+								       lkey[0]))
+								     + temp_l);
+							}
+
+							/* Calculate new body, position in item and insert_size[0] */
+							if (l_n > zeros_num) {
+								body +=
+								    (l_n -
+								     zeros_num);
+								zeros_num = 0;
+							} else
+								zeros_num -=
+								    l_n;
+							pos_in_item = 0;
+
+							RFALSE
+							    (comp_short_le_keys
+							     (B_N_PKEY(tbS0, 0),
+							      B_N_PKEY(tb->L[0],
+								       B_NR_ITEMS
+								       (tb->
+									L[0]) -
+								       1))
+							     ||
+							     !op_is_left_mergeable
+							     (B_N_PKEY(tbS0, 0),
+							      tbS0->b_size)
+							     ||
+							     !op_is_left_mergeable
+							     (B_N_PDELIM_KEY
+							      (tb->CFL[0],
+							       tb->lkey[0]),
+							      tbS0->b_size),
+							     "PAP-12120: item must be merge-able with left neighboring item");
+						} else {	/* only part of the appended item will be in L[0] */
+
+							/* Calculate position in item for append in S[0] */
+							pos_in_item -=
+							    tb->lbytes;
+
+							RFALSE(pos_in_item <= 0,
+							       "PAP-12125: no place for paste. pos_in_item=%d",
+							       pos_in_item);
+
+							/* Shift lnum[0] - 1 items in whole. Shift lbytes - 1 byte from item number lnum[0] */
+							leaf_shift_left(tb,
+									tb->
+									lnum[0],
+									tb->
+									lbytes);
+						}
+					}
+				} else {	/* appended item will be in L[0] in whole */
+
+					struct item_head *pasted;
+
+					if (!item_pos && op_is_left_mergeable(B_N_PKEY(tbS0, 0), tbS0->b_size)) {	/* if we paste into first item of S[0] and it is left mergable */
+						/* then increment pos_in_item by the size of the last item in L[0] */
+						pasted =
+						    B_N_PITEM_HEAD(tb->L[0],
+								   n - 1);
+						if (is_direntry_le_ih(pasted))
+							pos_in_item +=
+							    ih_entry_count
+							    (pasted);
+						else
+							pos_in_item +=
+							    ih_item_len(pasted);
+					}
+
+					/* Shift lnum[0] - 1 items in whole. Shift lbytes - 1 byte from item number lnum[0] */
+					ret_val =
+					    leaf_shift_left(tb, tb->lnum[0],
+							    tb->lbytes);
+					/* Append to body of item in L[0] */
+					bi.tb = tb;
+					bi.bi_bh = tb->L[0];
+					bi.bi_parent = tb->FL[0];
+					bi.bi_position =
+					    get_left_neighbor_position(tb, 0);
+					leaf_paste_in_buffer(&bi,
+							     n + item_pos -
+							     ret_val,
+							     pos_in_item,
+							     tb->insert_size[0],
+							     body, zeros_num);
+
+					/* if appended item is directory, paste entry */
+					pasted =
+					    B_N_PITEM_HEAD(tb->L[0],
+							   n + item_pos -
+							   ret_val);
+					if (is_direntry_le_ih(pasted))
+						leaf_paste_entries(bi.bi_bh,
+								   n +
+								   item_pos -
+								   ret_val,
+								   pos_in_item,
+								   1,
+								   (struct
+								    reiserfs_de_head
+								    *)body,
+								   body +
+								   DEH_SIZE,
+								   tb->
+								   insert_size
+								   [0]
+						    );
+					/* if appended item is indirect item, put unformatted node into un list */
+					if (is_indirect_le_ih(pasted))
+						set_ih_free_space(pasted, 0);
+					tb->insert_size[0] = 0;
+					zeros_num = 0;
+				}
+				break;
+			default:	/* cases d and t */
+				reiserfs_panic(tb->tb_sb,
+					       "PAP-12130: balance_leaf: lnum > 0: unexpectable mode: %s(%d)",
+					       (flag ==
+						M_DELETE) ? "DELETE" : ((flag ==
+									 M_CUT)
+									? "CUT"
+									:
+									"UNKNOWN"),
+					       flag);
+			}
+		} else {
+			/* new item doesn't fall into L[0] */
+			leaf_shift_left(tb, tb->lnum[0], tb->lbytes);
+		}
+	}
+
+	/* tb->lnum[0] > 0 */
+	/* Calculate new item position */
+	item_pos -= (tb->lnum[0] - ((tb->lbytes != -1) ? 1 : 0));
+
+	if (tb->rnum[0] > 0) {
+		/* shift rnum[0] items from S[0] to the right neighbor R[0] */
+		n = B_NR_ITEMS(tbS0);
+		switch (flag) {
+
+		case M_INSERT:	/* insert item */
+			if (n - tb->rnum[0] < item_pos) {	/* new item or its part falls to R[0] */
+				if (item_pos == n - tb->rnum[0] + 1 && tb->rbytes != -1) {	/* part of new item falls into R[0] */
+					loff_t old_key_comp, old_len,
+					    r_zeros_number;
+					const char *r_body;
+					int version;
+					loff_t offset;
+
+					leaf_shift_right(tb, tb->rnum[0] - 1,
+							 -1);
+
+					version = ih_version(ih);
+					/* Remember key component and item length */
+					old_key_comp = le_ih_k_offset(ih);
+					old_len = ih_item_len(ih);
+
+					/* Calculate key component and item length to insert into R[0] */
+					offset =
+					    le_ih_k_offset(ih) +
+					    ((old_len -
+					      tb->
+					      rbytes) << (is_indirect_le_ih(ih)
+							  ? tb->tb_sb->
+							  s_blocksize_bits -
+							  UNFM_P_SHIFT : 0));
+					set_le_ih_k_offset(ih, offset);
+					put_ih_item_len(ih, tb->rbytes);
+					/* Insert part of the item into R[0] */
+					bi.tb = tb;
+					bi.bi_bh = tb->R[0];
+					bi.bi_parent = tb->FR[0];
+					bi.bi_position =
+					    get_right_neighbor_position(tb, 0);
+					if ((old_len - tb->rbytes) > zeros_num) {
+						r_zeros_number = 0;
+						r_body =
+						    body + (old_len -
+							    tb->rbytes) -
+						    zeros_num;
+					} else {
+						r_body = body;
+						r_zeros_number =
+						    zeros_num - (old_len -
+								 tb->rbytes);
+						zeros_num -= r_zeros_number;
+					}
+
+					leaf_insert_into_buf(&bi, 0, ih, r_body,
+							     r_zeros_number);
+
+					/* Replace right delimiting key by first key in R[0] */
+					replace_key(tb, tb->CFR[0], tb->rkey[0],
+						    tb->R[0], 0);
+
+					/* Calculate key component and item length to insert into S[0] */
+					set_le_ih_k_offset(ih, old_key_comp);
+					put_ih_item_len(ih,
+							old_len - tb->rbytes);
+
+					tb->insert_size[0] -= tb->rbytes;
+
+				} else {	/* whole new item falls into R[0] */
+
+					/* Shift rnum[0]-1 items to R[0] */
+					ret_val =
+					    leaf_shift_right(tb,
+							     tb->rnum[0] - 1,
+							     tb->rbytes);
+					/* Insert new item into R[0] */
+					bi.tb = tb;
+					bi.bi_bh = tb->R[0];
+					bi.bi_parent = tb->FR[0];
+					bi.bi_position =
+					    get_right_neighbor_position(tb, 0);
+					leaf_insert_into_buf(&bi,
+							     item_pos - n +
+							     tb->rnum[0] - 1,
+							     ih, body,
+							     zeros_num);
+
+					if (item_pos - n + tb->rnum[0] - 1 == 0) {
+						replace_key(tb, tb->CFR[0],
+							    tb->rkey[0],
+							    tb->R[0], 0);
+
+					}
+					zeros_num = tb->insert_size[0] = 0;
+				}
+			} else {	/* new item or part of it doesn't fall into R[0] */
+
+				leaf_shift_right(tb, tb->rnum[0], tb->rbytes);
+			}
+			break;
+
+		case M_PASTE:	/* append item */
+
+			if (n - tb->rnum[0] <= item_pos) {	/* pasted item or part of it falls to R[0] */
+				if (item_pos == n - tb->rnum[0] && tb->rbytes != -1) {	/* we must shift the part of the appended item */
+					if (is_direntry_le_ih(B_N_PITEM_HEAD(tbS0, item_pos))) {	/* we append to directory item */
+						int entry_count;
+
+						RFALSE(zeros_num,
+						       "PAP-12145: invalid parameter in case of a directory");
+						entry_count =
+						    I_ENTRY_COUNT(B_N_PITEM_HEAD
+								  (tbS0,
+								   item_pos));
+						if (entry_count - tb->rbytes <
+						    pos_in_item)
+							/* new directory entry falls into R[0] */
+						{
+							int paste_entry_position;
+
+							RFALSE(tb->rbytes - 1 >=
+							       entry_count
+							       || !tb->
+							       insert_size[0],
+							       "PAP-12150: no enough of entries to shift to R[0]: rbytes=%d, entry_count=%d",
+							       tb->rbytes,
+							       entry_count);
+							/* Shift rnum[0]-1 items in whole. Shift rbytes-1 directory entries from directory item number rnum[0] */
+							leaf_shift_right(tb,
+									 tb->
+									 rnum
+									 [0],
+									 tb->
+									 rbytes
+									 - 1);
+							/* Paste given directory entry to directory item */
+							paste_entry_position =
+							    pos_in_item -
+							    entry_count +
+							    tb->rbytes - 1;
+							bi.tb = tb;
+							bi.bi_bh = tb->R[0];
+							bi.bi_parent =
+							    tb->FR[0];
+							bi.bi_position =
+							    get_right_neighbor_position
+							    (tb, 0);
+							leaf_paste_in_buffer
+							    (&bi, 0,
+							     paste_entry_position,
+							     tb->insert_size[0],
+							     body, zeros_num);
+							/* paste entry */
+							leaf_paste_entries(bi.
+									   bi_bh,
+									   0,
+									   paste_entry_position,
+									   1,
+									   (struct
+									    reiserfs_de_head
+									    *)
+									   body,
+									   body
+									   +
+									   DEH_SIZE,
+									   tb->
+									   insert_size
+									   [0]
+							    );
+
+							if (paste_entry_position
+							    == 0) {
+								/* change delimiting keys */
+								replace_key(tb,
+									    tb->
+									    CFR
+									    [0],
+									    tb->
+									    rkey
+									    [0],
+									    tb->
+									    R
+									    [0],
+									    0);
+							}
+
+							tb->insert_size[0] = 0;
+							pos_in_item++;
+						} else {	/* new directory entry doesn't fall into R[0] */
+
+							leaf_shift_right(tb,
+									 tb->
+									 rnum
+									 [0],
+									 tb->
+									 rbytes);
+						}
+					} else {	/* regular object */
+
+						int n_shift, n_rem,
+						    r_zeros_number;
+						const char *r_body;
+
+						/* Calculate number of bytes which must be shifted from appended item */
+						if ((n_shift =
+						     tb->rbytes -
+						     tb->insert_size[0]) < 0)
+							n_shift = 0;
+
+						RFALSE(pos_in_item !=
+						       ih_item_len
+						       (B_N_PITEM_HEAD
+							(tbS0, item_pos)),
+						       "PAP-12155: invalid position to paste. ih_item_len=%d, pos_in_item=%d",
+						       pos_in_item,
+						       ih_item_len
+						       (B_N_PITEM_HEAD
+							(tbS0, item_pos)));
+
+						leaf_shift_right(tb,
+								 tb->rnum[0],
+								 n_shift);
+						/* Calculate number of bytes which must remain in body after appending to R[0] */
+						if ((n_rem =
+						     tb->insert_size[0] -
+						     tb->rbytes) < 0)
+							n_rem = 0;
+
+						{
+							int version;
+							unsigned long temp_rem =
+							    n_rem;
+
+							version =
+							    ih_version
+							    (B_N_PITEM_HEAD
+							     (tb->R[0], 0));
+							if (is_indirect_le_key
+							    (version,
+							     B_N_PKEY(tb->R[0],
+								      0))) {
+								temp_rem =
+								    n_rem <<
+								    (tb->tb_sb->
+								     s_blocksize_bits
+								     -
+								     UNFM_P_SHIFT);
+							}
+							set_le_key_k_offset
+							    (version,
+							     B_N_PKEY(tb->R[0],
+								      0),
+							     le_key_k_offset
+							     (version,
+							      B_N_PKEY(tb->R[0],
+								       0)) +
+							     temp_rem);
+							set_le_key_k_offset
+							    (version,
+							     B_N_PDELIM_KEY(tb->
+									    CFR
+									    [0],
+									    tb->
+									    rkey
+									    [0]),
+							     le_key_k_offset
+							     (version,
+							      B_N_PDELIM_KEY
+							      (tb->CFR[0],
+							       tb->rkey[0])) +
+							     temp_rem);
+						}
+/*		  k_offset (B_N_PKEY(tb->R[0],0)) += n_rem;
+		  k_offset (B_N_PDELIM_KEY(tb->CFR[0],tb->rkey[0])) += n_rem;*/
+						do_balance_mark_internal_dirty
+						    (tb, tb->CFR[0], 0);
+
+						/* Append part of body into R[0] */
+						bi.tb = tb;
+						bi.bi_bh = tb->R[0];
+						bi.bi_parent = tb->FR[0];
+						bi.bi_position =
+						    get_right_neighbor_position
+						    (tb, 0);
+						if (n_rem > zeros_num) {
+							r_zeros_number = 0;
+							r_body =
+							    body + n_rem -
+							    zeros_num;
+						} else {
+							r_body = body;
+							r_zeros_number =
+							    zeros_num - n_rem;
+							zeros_num -=
+							    r_zeros_number;
+						}
+
+						leaf_paste_in_buffer(&bi, 0,
+								     n_shift,
+								     tb->
+								     insert_size
+								     [0] -
+								     n_rem,
+								     r_body,
+								     r_zeros_number);
+
+						if (is_indirect_le_ih
+						    (B_N_PITEM_HEAD
+						     (tb->R[0], 0))) {
+#if 0
+							RFALSE(n_rem,
+							       "PAP-12160: paste more than one unformatted node pointer");
+#endif
+							set_ih_free_space
+							    (B_N_PITEM_HEAD
+							     (tb->R[0], 0), 0);
+						}
+						tb->insert_size[0] = n_rem;
+						if (!n_rem)
+							pos_in_item++;
+					}
+				} else {	/* pasted item in whole falls into R[0] */
+
+					struct item_head *pasted;
+
+					ret_val =
+					    leaf_shift_right(tb, tb->rnum[0],
+							     tb->rbytes);
+					/* append item in R[0] */
+					if (pos_in_item >= 0) {
+						bi.tb = tb;
+						bi.bi_bh = tb->R[0];
+						bi.bi_parent = tb->FR[0];
+						bi.bi_position =
+						    get_right_neighbor_position
+						    (tb, 0);
+						leaf_paste_in_buffer(&bi,
+								     item_pos -
+								     n +
+								     tb->
+								     rnum[0],
+								     pos_in_item,
+								     tb->
+								     insert_size
+								     [0], body,
+								     zeros_num);
+					}
+
+					/* paste new entry, if item is directory item */
+					pasted =
+					    B_N_PITEM_HEAD(tb->R[0],
+							   item_pos - n +
+							   tb->rnum[0]);
+					if (is_direntry_le_ih(pasted)
+					    && pos_in_item >= 0) {
+						leaf_paste_entries(bi.bi_bh,
+								   item_pos -
+								   n +
+								   tb->rnum[0],
+								   pos_in_item,
+								   1,
+								   (struct
+								    reiserfs_de_head
+								    *)body,
+								   body +
+								   DEH_SIZE,
+								   tb->
+								   insert_size
+								   [0]
+						    );
+						if (!pos_in_item) {
+
+							RFALSE(item_pos - n +
+							       tb->rnum[0],
+							       "PAP-12165: directory item must be first item of node when pasting is in 0th position");
+
+							/* update delimiting keys */
+							replace_key(tb,
+								    tb->CFR[0],
+								    tb->rkey[0],
+								    tb->R[0],
+								    0);
+						}
+					}
+
+					if (is_indirect_le_ih(pasted))
+						set_ih_free_space(pasted, 0);
+					zeros_num = tb->insert_size[0] = 0;
+				}
+			} else {	/* new item doesn't fall into R[0] */
+
+				leaf_shift_right(tb, tb->rnum[0], tb->rbytes);
+			}
+			break;
+		default:	/* cases d and t */
+			reiserfs_panic(tb->tb_sb,
+				       "PAP-12175: balance_leaf: rnum > 0: unexpectable mode: %s(%d)",
+				       (flag ==
+					M_DELETE) ? "DELETE" : ((flag ==
+								 M_CUT) ? "CUT"
+								: "UNKNOWN"),
+				       flag);
+		}
+
+	}
+
+	/* tb->rnum[0] > 0 */
+	RFALSE(tb->blknum[0] > 3,
+	       "PAP-12180: blknum can not be %d. It must be <= 3",
+	       tb->blknum[0]);
+	RFALSE(tb->blknum[0] < 0,
+	       "PAP-12185: blknum can not be %d. It must be >= 0",
+	       tb->blknum[0]);
+
+	/* if while adding to a node we discover that it is possible to split
+	   it in two, and merge the left part into the left neighbor and the
+	   right part into the right neighbor, eliminating the node */
+	if (tb->blknum[0] == 0) {	/* node S[0] is empty now */
+
+		RFALSE(!tb->lnum[0] || !tb->rnum[0],
+		       "PAP-12190: lnum and rnum must not be zero");
+		/* if insertion was done before 0-th position in R[0], right
+		   delimiting key of the tb->L[0]'s and left delimiting key are
+		   not set correctly */
+		if (tb->CFL[0]) {
+			if (!tb->CFR[0])
+				reiserfs_panic(tb->tb_sb,
+					       "vs-12195: balance_leaf: CFR not initialized");
+			copy_key(B_N_PDELIM_KEY(tb->CFL[0], tb->lkey[0]),
+				 B_N_PDELIM_KEY(tb->CFR[0], tb->rkey[0]));
+			do_balance_mark_internal_dirty(tb, tb->CFL[0], 0);
+		}
+
+		reiserfs_invalidate_buffer(tb, tbS0);
+		return 0;
+	}
+
+	/* Fill new nodes that appear in place of S[0] */
+
+	/* I am told that this copying is because we need an array to enable
+	   the looping code. -Hans */
+	snum[0] = tb->s1num, snum[1] = tb->s2num;
+	sbytes[0] = tb->s1bytes;
+	sbytes[1] = tb->s2bytes;
+	for (i = tb->blknum[0] - 2; i >= 0; i--) {
+
+		RFALSE(!snum[i], "PAP-12200: snum[%d] == %d. Must be > 0", i,
+		       snum[i]);
+
+		/* here we shift from S to S_new nodes */
+
+		S_new[i] = get_FEB(tb);
+
+		/* initialized block type and tree level */
+		set_blkh_level(B_BLK_HEAD(S_new[i]), DISK_LEAF_NODE_LEVEL);
+
+		n = B_NR_ITEMS(tbS0);
+
+		switch (flag) {
+		case M_INSERT:	/* insert item */
+
+			if (n - snum[i] < item_pos) {	/* new item or it's part falls to first new node S_new[i] */
+				if (item_pos == n - snum[i] + 1 && sbytes[i] != -1) {	/* part of new item falls into S_new[i] */
+					int old_key_comp, old_len,
+					    r_zeros_number;
+					const char *r_body;
+					int version;
+
+					/* Move snum[i]-1 items from S[0] to S_new[i] */
+					leaf_move_items(LEAF_FROM_S_TO_SNEW, tb,
+							snum[i] - 1, -1,
+							S_new[i]);
+					/* Remember key component and item length */
+					version = ih_version(ih);
+					old_key_comp = le_ih_k_offset(ih);
+					old_len = ih_item_len(ih);
+
+					/* Calculate key component and item length to insert into S_new[i] */
+					set_le_ih_k_offset(ih,
+							   le_ih_k_offset(ih) +
+							   ((old_len -
+							     sbytes[i]) <<
+							    (is_indirect_le_ih
+							     (ih) ? tb->tb_sb->
+							     s_blocksize_bits -
+							     UNFM_P_SHIFT :
+							     0)));
+
+					put_ih_item_len(ih, sbytes[i]);
+
+					/* Insert part of the item into S_new[i] before 0-th item */
+					bi.tb = tb;
+					bi.bi_bh = S_new[i];
+					bi.bi_parent = NULL;
+					bi.bi_position = 0;
+
+					if ((old_len - sbytes[i]) > zeros_num) {
+						r_zeros_number = 0;
+						r_body =
+						    body + (old_len -
+							    sbytes[i]) -
+						    zeros_num;
+					} else {
+						r_body = body;
+						r_zeros_number =
+						    zeros_num - (old_len -
+								 sbytes[i]);
+						zeros_num -= r_zeros_number;
+					}
+
+					leaf_insert_into_buf(&bi, 0, ih, r_body,
+							     r_zeros_number);
+
+					/* Calculate key component and item length to insert into S[i] */
+					set_le_ih_k_offset(ih, old_key_comp);
+					put_ih_item_len(ih,
+							old_len - sbytes[i]);
+					tb->insert_size[0] -= sbytes[i];
+				} else {	/* whole new item falls into S_new[i] */
+
+					/* Shift snum[0] - 1 items to S_new[i] (sbytes[i] of split item) */
+					leaf_move_items(LEAF_FROM_S_TO_SNEW, tb,
+							snum[i] - 1, sbytes[i],
+							S_new[i]);
+
+					/* Insert new item into S_new[i] */
+					bi.tb = tb;
+					bi.bi_bh = S_new[i];
+					bi.bi_parent = NULL;
+					bi.bi_position = 0;
+					leaf_insert_into_buf(&bi,
+							     item_pos - n +
+							     snum[i] - 1, ih,
+							     body, zeros_num);
+
+					zeros_num = tb->insert_size[0] = 0;
+				}
+			}
+
+			else {	/* new item or it part don't falls into S_new[i] */
+
+				leaf_move_items(LEAF_FROM_S_TO_SNEW, tb,
+						snum[i], sbytes[i], S_new[i]);
+			}
+			break;
+
+		case M_PASTE:	/* append item */
+
+			if (n - snum[i] <= item_pos) {	/* pasted item or part if it falls to S_new[i] */
+				if (item_pos == n - snum[i] && sbytes[i] != -1) {	/* we must shift part of the appended item */
+					struct item_head *aux_ih;
+
+					RFALSE(ih, "PAP-12210: ih must be 0");
+
+					if (is_direntry_le_ih
+					    (aux_ih =
+					     B_N_PITEM_HEAD(tbS0, item_pos))) {
+						/* we append to directory item */
+
+						int entry_count;
+
+						entry_count =
+						    ih_entry_count(aux_ih);
+
+						if (entry_count - sbytes[i] <
+						    pos_in_item
+						    && pos_in_item <=
+						    entry_count) {
+							/* new directory entry falls into S_new[i] */
+
+							RFALSE(!tb->
+							       insert_size[0],
+							       "PAP-12215: insert_size is already 0");
+							RFALSE(sbytes[i] - 1 >=
+							       entry_count,
+							       "PAP-12220: there are no so much entries (%d), only %d",
+							       sbytes[i] - 1,
+							       entry_count);
+
+							/* Shift snum[i]-1 items in whole. Shift sbytes[i] directory entries from directory item number snum[i] */
+							leaf_move_items
+							    (LEAF_FROM_S_TO_SNEW,
+							     tb, snum[i],
+							     sbytes[i] - 1,
+							     S_new[i]);
+							/* Paste given directory entry to directory item */
+							bi.tb = tb;
+							bi.bi_bh = S_new[i];
+							bi.bi_parent = NULL;
+							bi.bi_position = 0;
+							leaf_paste_in_buffer
+							    (&bi, 0,
+							     pos_in_item -
+							     entry_count +
+							     sbytes[i] - 1,
+							     tb->insert_size[0],
+							     body, zeros_num);
+							/* paste new directory entry */
+							leaf_paste_entries(bi.
+									   bi_bh,
+									   0,
+									   pos_in_item
+									   -
+									   entry_count
+									   +
+									   sbytes
+									   [i] -
+									   1, 1,
+									   (struct
+									    reiserfs_de_head
+									    *)
+									   body,
+									   body
+									   +
+									   DEH_SIZE,
+									   tb->
+									   insert_size
+									   [0]
+							    );
+							tb->insert_size[0] = 0;
+							pos_in_item++;
+						} else {	/* new directory entry doesn't fall into S_new[i] */
+							leaf_move_items
+							    (LEAF_FROM_S_TO_SNEW,
+							     tb, snum[i],
+							     sbytes[i],
+							     S_new[i]);
+						}
+					} else {	/* regular object */
+
+						int n_shift, n_rem,
+						    r_zeros_number;
+						const char *r_body;
+
+						RFALSE(pos_in_item !=
+						       ih_item_len
+						       (B_N_PITEM_HEAD
+							(tbS0, item_pos))
+						       || tb->insert_size[0] <=
+						       0,
+						       "PAP-12225: item too short or insert_size <= 0");
+
+						/* Calculate number of bytes which must be shifted from appended item */
+						n_shift =
+						    sbytes[i] -
+						    tb->insert_size[0];
+						if (n_shift < 0)
+							n_shift = 0;
+						leaf_move_items
+						    (LEAF_FROM_S_TO_SNEW, tb,
+						     snum[i], n_shift,
+						     S_new[i]);
+
+						/* Calculate number of bytes which must remain in body after append to S_new[i] */
+						n_rem =
+						    tb->insert_size[0] -
+						    sbytes[i];
+						if (n_rem < 0)
+							n_rem = 0;
+						/* Append part of body into S_new[0] */
+						bi.tb = tb;
+						bi.bi_bh = S_new[i];
+						bi.bi_parent = NULL;
+						bi.bi_position = 0;
+
+						if (n_rem > zeros_num) {
+							r_zeros_number = 0;
+							r_body =
+							    body + n_rem -
+							    zeros_num;
+						} else {
+							r_body = body;
+							r_zeros_number =
+							    zeros_num - n_rem;
+							zeros_num -=
+							    r_zeros_number;
+						}
+
+						leaf_paste_in_buffer(&bi, 0,
+								     n_shift,
+								     tb->
+								     insert_size
+								     [0] -
+								     n_rem,
+								     r_body,
+								     r_zeros_number);
+						{
+							struct item_head *tmp;
+
+							tmp =
+							    B_N_PITEM_HEAD(S_new
+									   [i],
+									   0);
+							if (is_indirect_le_ih
+							    (tmp)) {
+								set_ih_free_space
+								    (tmp, 0);
+								set_le_ih_k_offset
+								    (tmp,
+								     le_ih_k_offset
+								     (tmp) +
+								     (n_rem <<
+								      (tb->
+								       tb_sb->
+								       s_blocksize_bits
+								       -
+								       UNFM_P_SHIFT)));
+							} else {
+								set_le_ih_k_offset
+								    (tmp,
+								     le_ih_k_offset
+								     (tmp) +
+								     n_rem);
+							}
+						}
+
+						tb->insert_size[0] = n_rem;
+						if (!n_rem)
+							pos_in_item++;
+					}
+				} else
+					/* item falls wholly into S_new[i] */
+				{
+					int leaf_mi;
+					struct item_head *pasted;
+
+#ifdef CONFIG_REISERFS_CHECK
+					struct item_head *ih_check =
+					    B_N_PITEM_HEAD(tbS0, item_pos);
+
+					if (!is_direntry_le_ih(ih_check)
+					    && (pos_in_item != ih_item_len(ih_check)
+						|| tb->insert_size[0] <= 0))
+						reiserfs_panic(tb->tb_sb,
+							       "PAP-12235: balance_leaf: pos_in_item must be equal to ih_item_len");
+#endif				/* CONFIG_REISERFS_CHECK */
+
+					leaf_mi =
+					    leaf_move_items(LEAF_FROM_S_TO_SNEW,
+							    tb, snum[i],
+							    sbytes[i],
+							    S_new[i]);
+
+					RFALSE(leaf_mi,
+					       "PAP-12240: unexpected value returned by leaf_move_items (%d)",
+					       leaf_mi);
+
+					/* paste into item */
+					bi.tb = tb;
+					bi.bi_bh = S_new[i];
+					bi.bi_parent = NULL;
+					bi.bi_position = 0;
+					leaf_paste_in_buffer(&bi,
+							     item_pos - n +
+							     snum[i],
+							     pos_in_item,
+							     tb->insert_size[0],
+							     body, zeros_num);
+
+					pasted =
+					    B_N_PITEM_HEAD(S_new[i],
+							   item_pos - n +
+							   snum[i]);
+					if (is_direntry_le_ih(pasted)) {
+						leaf_paste_entries(bi.bi_bh,
+								   item_pos -
+								   n + snum[i],
+								   pos_in_item,
+								   1,
+								   (struct
+								    reiserfs_de_head
+								    *)body,
+								   body +
+								   DEH_SIZE,
+								   tb->
+								   insert_size
+								   [0]
+						    );
+					}
+
+					/* if we paste to indirect item update ih_free_space */
+					if (is_indirect_le_ih(pasted))
+						set_ih_free_space(pasted, 0);
+					zeros_num = tb->insert_size[0] = 0;
+				}
+			}
+
+			else {	/* pasted item doesn't fall into S_new[i] */
+
+				leaf_move_items(LEAF_FROM_S_TO_SNEW, tb,
+						snum[i], sbytes[i], S_new[i]);
+			}
+			break;
+		default:	/* cases d and t */
+			reiserfs_panic(tb->tb_sb,
+				       "PAP-12245: balance_leaf: blknum > 2: unexpectable mode: %s(%d)",
+				       (flag ==
+					M_DELETE) ? "DELETE" : ((flag ==
+								 M_CUT) ? "CUT"
+								: "UNKNOWN"),
+				       flag);
+		}
+
+		memcpy(insert_key + i, B_N_PKEY(S_new[i], 0), KEY_SIZE);
+		insert_ptr[i] = S_new[i];
+
+		RFALSE(!buffer_journaled(S_new[i])
+		       || buffer_journal_dirty(S_new[i])
+		       || buffer_dirty(S_new[i]), "PAP-12247: S_new[%d] : (%b)",
+		       i, S_new[i]);
+	}
+
+	/* if the affected item was not wholly shifted then we perform all necessary operations on that part or whole of the
+	   affected item which remains in S */
+	if (0 <= item_pos && item_pos < tb->s0num) {	/* if we must insert or append into buffer S[0] */
+
+		switch (flag) {
+		case M_INSERT:	/* insert item into S[0] */
+			bi.tb = tb;
+			bi.bi_bh = tbS0;
+			bi.bi_parent = PATH_H_PPARENT(tb->tb_path, 0);
+			bi.bi_position = PATH_H_POSITION(tb->tb_path, 1);
+			leaf_insert_into_buf(&bi, item_pos, ih, body,
+					     zeros_num);
+
+			/* If we insert the first key change the delimiting key */
+			if (item_pos == 0) {
+				if (tb->CFL[0])	/* can be 0 in reiserfsck */
+					replace_key(tb, tb->CFL[0], tb->lkey[0],
+						    tbS0, 0);
+
+			}
+			break;
+
+		case M_PASTE:{	/* append item in S[0] */
+				struct item_head *pasted;
+
+				pasted = B_N_PITEM_HEAD(tbS0, item_pos);
+				/* when directory, may be new entry already pasted */
+				if (is_direntry_le_ih(pasted)) {
+					if (pos_in_item >= 0 &&
+					    pos_in_item <=
+					    ih_entry_count(pasted)) {
+
+						RFALSE(!tb->insert_size[0],
+						       "PAP-12260: insert_size is 0 already");
+
+						/* prepare space */
+						bi.tb = tb;
+						bi.bi_bh = tbS0;
+						bi.bi_parent =
+						    PATH_H_PPARENT(tb->tb_path,
+								   0);
+						bi.bi_position =
+						    PATH_H_POSITION(tb->tb_path,
+								    1);
+						leaf_paste_in_buffer(&bi,
+								     item_pos,
+								     pos_in_item,
+								     tb->
+								     insert_size
+								     [0], body,
+								     zeros_num);
+
+						/* paste entry */
+						leaf_paste_entries(bi.bi_bh,
+								   item_pos,
+								   pos_in_item,
+								   1,
+								   (struct
+								    reiserfs_de_head
+								    *)body,
+								   body +
+								   DEH_SIZE,
+								   tb->
+								   insert_size
+								   [0]
+						    );
+						if (!item_pos && !pos_in_item) {
+							RFALSE(!tb->CFL[0]
+							       || !tb->L[0],
+							       "PAP-12270: CFL[0]/L[0] must be specified");
+							if (tb->CFL[0]) {
+								replace_key(tb,
+									    tb->
+									    CFL
+									    [0],
+									    tb->
+									    lkey
+									    [0],
+									    tbS0,
+									    0);
+
+							}
+						}
+						tb->insert_size[0] = 0;
+					}
+				} else {	/* regular object */
+					if (pos_in_item == ih_item_len(pasted)) {
+
+						RFALSE(tb->insert_size[0] <= 0,
+						       "PAP-12275: insert size must not be %d",
+						       tb->insert_size[0]);
+						bi.tb = tb;
+						bi.bi_bh = tbS0;
+						bi.bi_parent =
+						    PATH_H_PPARENT(tb->tb_path,
+								   0);
+						bi.bi_position =
+						    PATH_H_POSITION(tb->tb_path,
+								    1);
+						leaf_paste_in_buffer(&bi,
+								     item_pos,
+								     pos_in_item,
+								     tb->
+								     insert_size
+								     [0], body,
+								     zeros_num);
+
+						if (is_indirect_le_ih(pasted)) {
+#if 0
+							RFALSE(tb->
+							       insert_size[0] !=
+							       UNFM_P_SIZE,
+							       "PAP-12280: insert_size for indirect item must be %d, not %d",
+							       UNFM_P_SIZE,
+							       tb->
+							       insert_size[0]);
+#endif
+							set_ih_free_space
+							    (pasted, 0);
+						}
+						tb->insert_size[0] = 0;
+					}
+#ifdef CONFIG_REISERFS_CHECK
+					else {
+						if (tb->insert_size[0]) {
+							print_cur_tb("12285");
+							reiserfs_panic(tb->
+								       tb_sb,
+								       "PAP-12285: balance_leaf: insert_size must be 0 (%d)",
+								       tb->
+								       insert_size
+								       [0]);
+						}
+					}
+#endif				/* CONFIG_REISERFS_CHECK */
+
+				}
+			}	/* case M_PASTE: */
+		}
+	}
+#ifdef CONFIG_REISERFS_CHECK
+	if (flag == M_PASTE && tb->insert_size[0]) {
+		print_cur_tb("12290");
+		reiserfs_panic(tb->tb_sb,
+			       "PAP-12290: balance_leaf: insert_size is still not 0 (%d)",
+			       tb->insert_size[0]);
+	}
+#endif				/* CONFIG_REISERFS_CHECK */
+
+	return 0;
+}				/* Leaf level of the tree is balanced (end of balance_leaf) */
+
+/* Make empty node */
+void make_empty_node(struct buffer_info *bi)
+{
+	struct block_head *blkh;
+
+	RFALSE(bi->bi_bh == NULL, "PAP-12295: pointer to the buffer is NULL");
+
+	blkh = B_BLK_HEAD(bi->bi_bh);
+	set_blkh_nr_item(blkh, 0);
+	set_blkh_free_space(blkh, MAX_CHILD_SIZE(bi->bi_bh));
+
+	if (bi->bi_parent)
+		B_N_CHILD(bi->bi_parent, bi->bi_position)->dc_size = 0;	/* Endian safe if 0 */
+}
+
+/* Get first empty buffer */
+struct buffer_head *get_FEB(struct tree_balance *tb)
+{
+	int i;
+	struct buffer_head *first_b;
+	struct buffer_info bi;
+
+	for (i = 0; i < MAX_FEB_SIZE; i++)
+		if (tb->FEB[i] != NULL)
+			break;
+
+	if (i == MAX_FEB_SIZE)
+		reiserfs_panic(tb->tb_sb,
+			       "vs-12300: get_FEB: FEB list is empty");
+
+	bi.tb = tb;
+	bi.bi_bh = first_b = tb->FEB[i];
+	bi.bi_parent = NULL;
+	bi.bi_position = 0;
+	make_empty_node(&bi);
+	set_buffer_uptodate(first_b);
+	tb->FEB[i] = NULL;
+	tb->used[i] = first_b;
+
+	return (first_b);
+}
+
+/* This is now used because reiserfs_free_block has to be able to
+** schedule.
+*/
+static void store_thrown(struct tree_balance *tb, struct buffer_head *bh)
+{
+	int i;
+
+	if (buffer_dirty(bh))
+		reiserfs_warning(tb->tb_sb,
+				 "store_thrown deals with dirty buffer");
+	for (i = 0; i < ARRAY_SIZE(tb->thrown); i++)
+		if (!tb->thrown[i]) {
+			tb->thrown[i] = bh;
+			get_bh(bh);	/* free_thrown puts this */
+			return;
+		}
+	reiserfs_warning(tb->tb_sb, "store_thrown: too many thrown buffers");
+}
+
+static void free_thrown(struct tree_balance *tb)
+{
+	int i;
+	b_blocknr_t blocknr;
+	for (i = 0; i < ARRAY_SIZE(tb->thrown); i++) {
+		if (tb->thrown[i]) {
+			blocknr = tb->thrown[i]->b_blocknr;
+			if (buffer_dirty(tb->thrown[i]))
+				reiserfs_warning(tb->tb_sb,
+						 "free_thrown deals with dirty buffer %d",
+						 blocknr);
+			brelse(tb->thrown[i]);	/* incremented in store_thrown */
+			reiserfs_free_block(tb->transaction_handle, NULL,
+					    blocknr, 0);
+		}
+	}
+}
+
+void reiserfs_invalidate_buffer(struct tree_balance *tb, struct buffer_head *bh)
+{
+	struct block_head *blkh;
+	blkh = B_BLK_HEAD(bh);
+	set_blkh_level(blkh, FREE_LEVEL);
+	set_blkh_nr_item(blkh, 0);
+
+	clear_buffer_dirty(bh);
+	store_thrown(tb, bh);
+}
+
+/* Replace n_dest'th key in buffer dest by n_src'th key of buffer src.*/
+void replace_key(struct tree_balance *tb, struct buffer_head *dest, int n_dest,
+		 struct buffer_head *src, int n_src)
+{
+
+	RFALSE(dest == NULL || src == NULL,
+	       "vs-12305: source or destination buffer is 0 (src=%p, dest=%p)",
+	       src, dest);
+	RFALSE(!B_IS_KEYS_LEVEL(dest),
+	       "vs-12310: invalid level (%z) for destination buffer. dest must be leaf",
+	       dest);
+	RFALSE(n_dest < 0 || n_src < 0,
+	       "vs-12315: src(%d) or dest(%d) key number < 0", n_src, n_dest);
+	RFALSE(n_dest >= B_NR_ITEMS(dest) || n_src >= B_NR_ITEMS(src),
+	       "vs-12320: src(%d(%d)) or dest(%d(%d)) key number is too big",
+	       n_src, B_NR_ITEMS(src), n_dest, B_NR_ITEMS(dest));
+
+	if (B_IS_ITEMS_LEVEL(src))
+		/* source buffer contains leaf node */
+		memcpy(B_N_PDELIM_KEY(dest, n_dest), B_N_PITEM_HEAD(src, n_src),
+		       KEY_SIZE);
+	else
+		memcpy(B_N_PDELIM_KEY(dest, n_dest), B_N_PDELIM_KEY(src, n_src),
+		       KEY_SIZE);
+
+	do_balance_mark_internal_dirty(tb, dest, 0);
+}
+
+int get_left_neighbor_position(struct tree_balance *tb, int h)
+{
+	int Sh_position = PATH_H_POSITION(tb->tb_path, h + 1);
+
+	RFALSE(PATH_H_PPARENT(tb->tb_path, h) == NULL || tb->FL[h] == NULL,
+	       "vs-12325: FL[%d](%p) or F[%d](%p) does not exist",
+	       h, tb->FL[h], h, PATH_H_PPARENT(tb->tb_path, h));
+
+	if (Sh_position == 0)
+		return B_NR_ITEMS(tb->FL[h]);
+	else
+		return Sh_position - 1;
+}
+
+int get_right_neighbor_position(struct tree_balance *tb, int h)
+{
+	int Sh_position = PATH_H_POSITION(tb->tb_path, h + 1);
+
+	RFALSE(PATH_H_PPARENT(tb->tb_path, h) == NULL || tb->FR[h] == NULL,
+	       "vs-12330: F[%d](%p) or FR[%d](%p) does not exist",
+	       h, PATH_H_PPARENT(tb->tb_path, h), h, tb->FR[h]);
+
+	if (Sh_position == B_NR_ITEMS(PATH_H_PPARENT(tb->tb_path, h)))
+		return 0;
+	else
+		return Sh_position + 1;
+}
+
+#ifdef CONFIG_REISERFS_CHECK
+
+int is_reusable(struct super_block *s, b_blocknr_t block, int bit_value);
+static void check_internal_node(struct super_block *s, struct buffer_head *bh,
+				char *mes)
+{
+	struct disk_child *dc;
+	int i;
+
+	RFALSE(!bh, "PAP-12336: bh == 0");
+
+	if (!bh || !B_IS_IN_TREE(bh))
+		return;
+
+	RFALSE(!buffer_dirty(bh) &&
+	       !(buffer_journaled(bh) || buffer_journal_dirty(bh)),
+	       "PAP-12337: buffer (%b) must be dirty", bh);
+	dc = B_N_CHILD(bh, 0);
+
+	for (i = 0; i <= B_NR_ITEMS(bh); i++, dc++) {
+		if (!is_reusable(s, dc_block_number(dc), 1)) {
+			print_cur_tb(mes);
+			reiserfs_panic(s,
+				       "PAP-12338: check_internal_node: invalid child pointer %y in %b",
+				       dc, bh);
+		}
+	}
+}
+
+static int locked_or_not_in_tree(struct buffer_head *bh, char *which)
+{
+	if ((!buffer_journal_prepared(bh) && buffer_locked(bh)) ||
+	    !B_IS_IN_TREE(bh)) {
+		reiserfs_warning(NULL,
+				 "vs-12339: locked_or_not_in_tree: %s (%b)",
+				 which, bh);
+		return 1;
+	}
+	return 0;
+}
+
+static int check_before_balancing(struct tree_balance *tb)
+{
+	int retval = 0;
+
+	if (cur_tb) {
+		reiserfs_panic(tb->tb_sb, "vs-12335: check_before_balancing: "
+			       "suspect that schedule occurred based on cur_tb not being null at this point in code. "
+			       "do_balance cannot properly handle schedule occurring while it runs.");
+	}
+
+	/* double check that buffers that we will modify are unlocked. (fix_nodes should already have
+	   prepped all of these for us). */
+	if (tb->lnum[0]) {
+		retval |= locked_or_not_in_tree(tb->L[0], "L[0]");
+		retval |= locked_or_not_in_tree(tb->FL[0], "FL[0]");
+		retval |= locked_or_not_in_tree(tb->CFL[0], "CFL[0]");
+		check_leaf(tb->L[0]);
+	}
+	if (tb->rnum[0]) {
+		retval |= locked_or_not_in_tree(tb->R[0], "R[0]");
+		retval |= locked_or_not_in_tree(tb->FR[0], "FR[0]");
+		retval |= locked_or_not_in_tree(tb->CFR[0], "CFR[0]");
+		check_leaf(tb->R[0]);
+	}
+	retval |= locked_or_not_in_tree(PATH_PLAST_BUFFER(tb->tb_path), "S[0]");
+	check_leaf(PATH_PLAST_BUFFER(tb->tb_path));
+
+	return retval;
+}
+
+static void check_after_balance_leaf(struct tree_balance *tb)
+{
+	if (tb->lnum[0]) {
+		if (B_FREE_SPACE(tb->L[0]) !=
+		    MAX_CHILD_SIZE(tb->L[0]) -
+		    dc_size(B_N_CHILD
+			    (tb->FL[0], get_left_neighbor_position(tb, 0)))) {
+			print_cur_tb("12221");
+			reiserfs_panic(tb->tb_sb,
+				       "PAP-12355: check_after_balance_leaf: shift to left was incorrect");
+		}
+	}
+	if (tb->rnum[0]) {
+		if (B_FREE_SPACE(tb->R[0]) !=
+		    MAX_CHILD_SIZE(tb->R[0]) -
+		    dc_size(B_N_CHILD
+			    (tb->FR[0], get_right_neighbor_position(tb, 0)))) {
+			print_cur_tb("12222");
+			reiserfs_panic(tb->tb_sb,
+				       "PAP-12360: check_after_balance_leaf: shift to right was incorrect");
+		}
+	}
+	if (PATH_H_PBUFFER(tb->tb_path, 1) &&
+	    (B_FREE_SPACE(PATH_H_PBUFFER(tb->tb_path, 0)) !=
+	     (MAX_CHILD_SIZE(PATH_H_PBUFFER(tb->tb_path, 0)) -
+	      dc_size(B_N_CHILD(PATH_H_PBUFFER(tb->tb_path, 1),
+				PATH_H_POSITION(tb->tb_path, 1)))))) {
+		int left = B_FREE_SPACE(PATH_H_PBUFFER(tb->tb_path, 0));
+		int right = (MAX_CHILD_SIZE(PATH_H_PBUFFER(tb->tb_path, 0)) -
+			     dc_size(B_N_CHILD(PATH_H_PBUFFER(tb->tb_path, 1),
+					       PATH_H_POSITION(tb->tb_path,
+							       1))));
+		print_cur_tb("12223");
+		reiserfs_warning(tb->tb_sb,
+				 "B_FREE_SPACE (PATH_H_PBUFFER(tb->tb_path,0)) = %d; "
+				 "MAX_CHILD_SIZE (%d) - dc_size( %y, %d ) [%d] = %d",
+				 left,
+				 MAX_CHILD_SIZE(PATH_H_PBUFFER(tb->tb_path, 0)),
+				 PATH_H_PBUFFER(tb->tb_path, 1),
+				 PATH_H_POSITION(tb->tb_path, 1),
+				 dc_size(B_N_CHILD
+					 (PATH_H_PBUFFER(tb->tb_path, 1),
+					  PATH_H_POSITION(tb->tb_path, 1))),
+				 right);
+		reiserfs_panic(tb->tb_sb,
+			       "PAP-12365: check_after_balance_leaf: S is incorrect");
+	}
+}
+
+static void check_leaf_level(struct tree_balance *tb)
+{
+	check_leaf(tb->L[0]);
+	check_leaf(tb->R[0]);
+	check_leaf(PATH_PLAST_BUFFER(tb->tb_path));
+}
+
+static void check_internal_levels(struct tree_balance *tb)
+{
+	int h;
+
+	/* check all internal nodes */
+	for (h = 1; tb->insert_size[h]; h++) {
+		check_internal_node(tb->tb_sb, PATH_H_PBUFFER(tb->tb_path, h),
+				    "BAD BUFFER ON PATH");
+		if (tb->lnum[h])
+			check_internal_node(tb->tb_sb, tb->L[h], "BAD L");
+		if (tb->rnum[h])
+			check_internal_node(tb->tb_sb, tb->R[h], "BAD R");
+	}
+
+}
+
+#endif
+
+/* Now we have all of the buffers that must be used in balancing of
+   the tree.  We rely on the assumption that schedule() will not occur
+   while do_balance works. ( Only interrupt handlers are acceptable.)
+   We balance the tree according to the analysis made before this,
+   using buffers already obtained.  For SMP support it will someday be
+   necessary to add ordered locking of tb. */
+
+/* Some interesting rules of balancing:
+
+   we delete a maximum of two nodes per level per balancing: we never
+   delete R, when we delete two of three nodes L, S, R then we move
+   them into R.
+
+   we only delete L if we are deleting two nodes, if we delete only
+   one node we delete S
+
+   if we shift leaves then we shift as much as we can: this is a
+   deliberate policy of extremism in node packing which results in
+   higher average utilization after repeated random balance operations
+   at the cost of more memory copies and more balancing as a result of
+   small insertions to full nodes.
+
+   if we shift internal nodes we try to evenly balance the node
+   utilization, with consequent less balancing at the cost of lower
+   utilization.
+
+   one could argue that the policy for directories in leaves should be
+   that of internal nodes, but we will wait until another day to
+   evaluate this....  It would be nice to someday measure and prove
+   these assumptions as to what is optimal....
+
+*/
+
+static inline void do_balance_starts(struct tree_balance *tb)
+{
+	/* use print_cur_tb() to see initial state of struct
+	   tree_balance */
+
+	/* store_print_tb (tb); */
+
+	/* do not delete, just comment it out */
+/*    print_tb(flag, PATH_LAST_POSITION(tb->tb_path), tb->tb_path->pos_in_item, tb, 
+	     "check");*/
+	RFALSE(check_before_balancing(tb), "PAP-12340: locked buffers in TB");
+#ifdef CONFIG_REISERFS_CHECK
+	cur_tb = tb;
+#endif
+}
+
+static inline void do_balance_completed(struct tree_balance *tb)
+{
+
+#ifdef CONFIG_REISERFS_CHECK
+	check_leaf_level(tb);
+	check_internal_levels(tb);
+	cur_tb = NULL;
+#endif
+
+	/* reiserfs_free_block is no longer schedule safe.  So, we need to
+	 ** put the buffers we want freed on the thrown list during do_balance,
+	 ** and then free them now
+	 */
+
+	REISERFS_SB(tb->tb_sb)->s_do_balance++;
+
+	/* release all nodes hold to perform the balancing */
+	unfix_nodes(tb);
+
+	free_thrown(tb);
+}
+
+void do_balance(struct tree_balance *tb,	/* tree_balance structure */
+		struct item_head *ih,	/* item header of inserted item */
+		const char *body,	/* body  of inserted item or bytes to paste */
+		int flag)
+{				/* i - insert, d - delete
+				   c - cut, p - paste
+
+				   Cut means delete part of an item
+				   (includes removing an entry from a
+				   directory).
+
+				   Delete means delete whole item.
+
+				   Insert means add a new item into the
+				   tree.
+
+				   Paste means to append to the end of an
+				   existing file or to insert a directory
+				   entry.  */
+	int child_pos,		/* position of a child node in its parent */
+	 h;			/* level of the tree being processed */
+	struct item_head insert_key[2];	/* in our processing of one level
+					   we sometimes determine what
+					   must be inserted into the next
+					   higher level.  This insertion
+					   consists of a key or two keys
+					   and their corresponding
+					   pointers */
+	struct buffer_head *insert_ptr[2];	/* inserted node-ptrs for the next
+						   level */
+
+	tb->tb_mode = flag;
+	tb->need_balance_dirty = 0;
+
+	if (FILESYSTEM_CHANGED_TB(tb)) {
+		reiserfs_panic(tb->tb_sb,
+			       "clm-6000: do_balance, fs generation has changed\n");
+	}
+	/* if we have no real work to do  */
+	if (!tb->insert_size[0]) {
+		reiserfs_warning(tb->tb_sb,
+				 "PAP-12350: do_balance: insert_size == 0, mode == %c",
+				 flag);
+		unfix_nodes(tb);
+		return;
+	}
+
+	atomic_inc(&(fs_generation(tb->tb_sb)));
+	do_balance_starts(tb);
+
+	/* balance leaf returns 0 except if combining L R and S into
+	   one node.  see balance_internal() for explanation of this
+	   line of code. */
+	child_pos = PATH_H_B_ITEM_ORDER(tb->tb_path, 0) +
+	    balance_leaf(tb, ih, body, flag, insert_key, insert_ptr);
+
+#ifdef CONFIG_REISERFS_CHECK
+	check_after_balance_leaf(tb);
+#endif
+
+	/* Balance internal level of the tree. */
+	for (h = 1; h < MAX_HEIGHT && tb->insert_size[h]; h++)
+		child_pos =
+		    balance_internal(tb, h, child_pos, insert_key, insert_ptr);
+
+	do_balance_completed(tb);
+
+}
diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
new file mode 100644
index 0000000..3340841
--- /dev/null
+++ b/fs/reiserfs/file.c
@@ -0,0 +1,310 @@
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ */
+
+#include <linux/time.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/reiserfs_acl.h>
+#include <linux/reiserfs_xattr.h>
+#include <asm/uaccess.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+#include <linux/writeback.h>
+#include <linux/blkdev.h>
+#include <linux/buffer_head.h>
+#include <linux/quotaops.h>
+
+/*
+** We pack the tails of files on file close, not at the time they are written.
+** This implies an unnecessary copy of the tail and an unnecessary indirect item
+** insertion/balancing, for files that are written in one write.
+** It avoids unnecessary tail packings (balances) for files that are written in
+** multiple writes and are small enough to have tails.
+** 
+** file_release is called by the VFS layer when the file is closed.  If
+** this is the last open file descriptor, and the file
+** small enough to have a tail, and the tail is currently in an
+** unformatted node, the tail is converted back into a direct item.
+** 
+** We use reiserfs_truncate_file to pack the tail, since it already has
+** all the conditions coded.  
+*/
+static int reiserfs_file_release(struct inode *inode, struct file *filp)
+{
+
+	struct reiserfs_transaction_handle th;
+	int err;
+	int jbegin_failure = 0;
+
+	BUG_ON(!S_ISREG(inode->i_mode));
+
+	/* fast out for when nothing needs to be done */
+	if ((atomic_read(&inode->i_count) > 1 ||
+	     !(REISERFS_I(inode)->i_flags & i_pack_on_close_mask) ||
+	     !tail_has_to_be_packed(inode)) &&
+	    REISERFS_I(inode)->i_prealloc_count <= 0) {
+		return 0;
+	}
+
+	mutex_lock(&inode->i_mutex);
+
+	mutex_lock(&(REISERFS_I(inode)->i_mmap));
+	if (REISERFS_I(inode)->i_flags & i_ever_mapped)
+		REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask;
+
+	reiserfs_write_lock(inode->i_sb);
+	/* freeing preallocation only involves relogging blocks that
+	 * are already in the current transaction.  preallocation gets
+	 * freed at the end of each transaction, so it is impossible for
+	 * us to log any additional blocks (including quota blocks)
+	 */
+	err = journal_begin(&th, inode->i_sb, 1);
+	if (err) {
+		/* uh oh, we can't allow the inode to go away while there
+		 * is still preallocation blocks pending.  Try to join the
+		 * aborted transaction
+		 */
+		jbegin_failure = err;
+		err = journal_join_abort(&th, inode->i_sb, 1);
+
+		if (err) {
+			/* hmpf, our choices here aren't good.  We can pin the inode
+			 * which will disallow unmount from every happening, we can
+			 * do nothing, which will corrupt random memory on unmount,
+			 * or we can forcibly remove the file from the preallocation
+			 * list, which will leak blocks on disk.  Lets pin the inode
+			 * and let the admin know what is going on.
+			 */
+			igrab(inode);
+			reiserfs_warning(inode->i_sb,
+					 "pinning inode %lu because the "
+					 "preallocation can't be freed",
+					 inode->i_ino);
+			goto out;
+		}
+	}
+	reiserfs_update_inode_transaction(inode);
+
+#ifdef REISERFS_PREALLOCATE
+	reiserfs_discard_prealloc(&th, inode);
+#endif
+	err = journal_end(&th, inode->i_sb, 1);
+
+	/* copy back the error code from journal_begin */
+	if (!err)
+		err = jbegin_failure;
+
+	if (!err && atomic_read(&inode->i_count) <= 1 &&
+	    (REISERFS_I(inode)->i_flags & i_pack_on_close_mask) &&
+	    tail_has_to_be_packed(inode)) {
+		/* if regular file is released by last holder and it has been
+		   appended (we append by unformatted node only) or its direct
+		   item(s) had to be converted, then it may have to be
+		   indirect2direct converted */
+		err = reiserfs_truncate_file(inode, 0);
+	}
+      out:
+	mutex_unlock(&(REISERFS_I(inode)->i_mmap));
+	mutex_unlock(&inode->i_mutex);
+	reiserfs_write_unlock(inode->i_sb);
+	return err;
+}
+
+static int reiserfs_file_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	struct inode *inode;
+
+	inode = file->f_path.dentry->d_inode;
+	mutex_lock(&(REISERFS_I(inode)->i_mmap));
+	REISERFS_I(inode)->i_flags |= i_ever_mapped;
+	mutex_unlock(&(REISERFS_I(inode)->i_mmap));
+
+	return generic_file_mmap(file, vma);
+}
+
+static void reiserfs_vfs_truncate_file(struct inode *inode)
+{
+	reiserfs_truncate_file(inode, 1);
+}
+
+/* Sync a reiserfs file. */
+
+/*
+ * FIXME: sync_mapping_buffers() never has anything to sync.  Can
+ * be removed...
+ */
+
+static int reiserfs_sync_file(struct file *p_s_filp,
+			      struct dentry *p_s_dentry, int datasync)
+{
+	struct inode *p_s_inode = p_s_dentry->d_inode;
+	int n_err;
+	int barrier_done;
+
+	BUG_ON(!S_ISREG(p_s_inode->i_mode));
+	n_err = sync_mapping_buffers(p_s_inode->i_mapping);
+	reiserfs_write_lock(p_s_inode->i_sb);
+	barrier_done = reiserfs_commit_for_inode(p_s_inode);
+	reiserfs_write_unlock(p_s_inode->i_sb);
+	if (barrier_done != 1 && reiserfs_barrier_flush(p_s_inode->i_sb))
+		blkdev_issue_flush(p_s_inode->i_sb->s_bdev, NULL);
+	if (barrier_done < 0)
+		return barrier_done;
+	return (n_err < 0) ? -EIO : 0;
+}
+
+/* taken fs/buffer.c:__block_commit_write */
+int reiserfs_commit_page(struct inode *inode, struct page *page,
+			 unsigned from, unsigned to)
+{
+	unsigned block_start, block_end;
+	int partial = 0;
+	unsigned blocksize;
+	struct buffer_head *bh, *head;
+	unsigned long i_size_index = inode->i_size >> PAGE_CACHE_SHIFT;
+	int new;
+	int logit = reiserfs_file_data_log(inode);
+	struct super_block *s = inode->i_sb;
+	int bh_per_page = PAGE_CACHE_SIZE / s->s_blocksize;
+	struct reiserfs_transaction_handle th;
+	int ret = 0;
+
+	th.t_trans_id = 0;
+	blocksize = 1 << inode->i_blkbits;
+
+	if (logit) {
+		reiserfs_write_lock(s);
+		ret = journal_begin(&th, s, bh_per_page + 1);
+		if (ret)
+			goto drop_write_lock;
+		reiserfs_update_inode_transaction(inode);
+	}
+	for (bh = head = page_buffers(page), block_start = 0;
+	     bh != head || !block_start;
+	     block_start = block_end, bh = bh->b_this_page) {
+
+		new = buffer_new(bh);
+		clear_buffer_new(bh);
+		block_end = block_start + blocksize;
+		if (block_end <= from || block_start >= to) {
+			if (!buffer_uptodate(bh))
+				partial = 1;
+		} else {
+			set_buffer_uptodate(bh);
+			if (logit) {
+				reiserfs_prepare_for_journal(s, bh, 1);
+				journal_mark_dirty(&th, s, bh);
+			} else if (!buffer_dirty(bh)) {
+				mark_buffer_dirty(bh);
+				/* do data=ordered on any page past the end
+				 * of file and any buffer marked BH_New.
+				 */
+				if (reiserfs_data_ordered(inode->i_sb) &&
+				    (new || page->index >= i_size_index)) {
+					reiserfs_add_ordered_list(inode, bh);
+				}
+			}
+		}
+	}
+	if (logit) {
+		ret = journal_end(&th, s, bh_per_page + 1);
+	      drop_write_lock:
+		reiserfs_write_unlock(s);
+	}
+	/*
+	 * If this is a partial write which happened to make all buffers
+	 * uptodate then we can optimize away a bogus readpage() for
+	 * the next read(). Here we 'discover' whether the page went
+	 * uptodate as a result of this (potentially partial) write.
+	 */
+	if (!partial)
+		SetPageUptodate(page);
+	return ret;
+}
+
+/* Write @count bytes at position @ppos in a file indicated by @file
+   from the buffer @buf.  
+
+   generic_file_write() is only appropriate for filesystems that are not seeking to optimize performance and want
+   something simple that works.  It is not for serious use by general purpose filesystems, excepting the one that it was
+   written for (ext2/3).  This is for several reasons:
+
+   * It has no understanding of any filesystem specific optimizations.
+
+   * It enters the filesystem repeatedly for each page that is written.
+
+   * It depends on reiserfs_get_block() function which if implemented by reiserfs performs costly search_by_key
+   * operation for each page it is supplied with. By contrast reiserfs_file_write() feeds as much as possible at a time
+   * to reiserfs which allows for fewer tree traversals.
+
+   * Each indirect pointer insertion takes a lot of cpu, because it involves memory moves inside of blocks.
+
+   * Asking the block allocation code for blocks one at a time is slightly less efficient.
+
+   All of these reasons for not using only generic file write were understood back when reiserfs was first miscoded to
+   use it, but we were in a hurry to make code freeze, and so it couldn't be revised then.  This new code should make
+   things right finally.
+
+   Future Features: providing search_by_key with hints.
+
+*/
+static ssize_t reiserfs_file_write(struct file *file,	/* the file we are going to write into */
+				   const char __user * buf,	/*  pointer to user supplied data
+								   (in userspace) */
+				   size_t count,	/* amount of bytes to write */
+				   loff_t * ppos	/* pointer to position in file that we start writing at. Should be updated to
+							 * new current position before returning. */
+				   )
+{
+	struct inode *inode = file->f_path.dentry->d_inode;	// Inode of the file that we are writing to.
+	/* To simplify coding at this time, we store
+	   locked pages in array for now */
+	struct reiserfs_transaction_handle th;
+	th.t_trans_id = 0;
+
+	/* If a filesystem is converted from 3.5 to 3.6, we'll have v3.5 items
+	* lying around (most of the disk, in fact). Despite the filesystem
+	* now being a v3.6 format, the old items still can't support large
+	* file sizes. Catch this case here, as the rest of the VFS layer is
+	* oblivious to the different limitations between old and new items.
+	* reiserfs_setattr catches this for truncates. This chunk is lifted
+	* from generic_write_checks. */
+	if (get_inode_item_key_version (inode) == KEY_FORMAT_3_5 &&
+	    *ppos + count > MAX_NON_LFS) {
+		if (*ppos >= MAX_NON_LFS) {
+			return -EFBIG;
+		}
+		if (count > MAX_NON_LFS - (unsigned long)*ppos)
+			count = MAX_NON_LFS - (unsigned long)*ppos;
+	}
+
+	return do_sync_write(file, buf, count, ppos);
+}
+
+const struct file_operations reiserfs_file_operations = {
+	.read = do_sync_read,
+	.write = reiserfs_file_write,
+	.ioctl = reiserfs_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl = reiserfs_compat_ioctl,
+#endif
+	.mmap = reiserfs_file_mmap,
+	.open = generic_file_open,
+	.release = reiserfs_file_release,
+	.fsync = reiserfs_sync_file,
+	.aio_read = generic_file_aio_read,
+	.aio_write = generic_file_aio_write,
+	.splice_read = generic_file_splice_read,
+	.splice_write = generic_file_splice_write,
+	.llseek = generic_file_llseek,
+};
+
+const struct inode_operations reiserfs_file_inode_operations = {
+	.truncate = reiserfs_vfs_truncate_file,
+	.setattr = reiserfs_setattr,
+	.setxattr = reiserfs_setxattr,
+	.getxattr = reiserfs_getxattr,
+	.listxattr = reiserfs_listxattr,
+	.removexattr = reiserfs_removexattr,
+	.permission = reiserfs_permission,
+};
diff --git a/fs/reiserfs/fix_node.c b/fs/reiserfs/fix_node.c
new file mode 100644
index 0000000..07d05e0
--- /dev/null
+++ b/fs/reiserfs/fix_node.c
@@ -0,0 +1,2582 @@
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ */
+
+/**
+ ** old_item_num
+ ** old_entry_num
+ ** set_entry_sizes
+ ** create_virtual_node
+ ** check_left
+ ** check_right
+ ** directory_part_size
+ ** get_num_ver
+ ** set_parameters
+ ** is_leaf_removable
+ ** are_leaves_removable
+ ** get_empty_nodes
+ ** get_lfree
+ ** get_rfree
+ ** is_left_neighbor_in_cache
+ ** decrement_key
+ ** get_far_parent
+ ** get_parents
+ ** can_node_be_removed
+ ** ip_check_balance
+ ** dc_check_balance_internal
+ ** dc_check_balance_leaf
+ ** dc_check_balance
+ ** check_balance
+ ** get_direct_parent
+ ** get_neighbors
+ ** fix_nodes
+ ** 
+ ** 
+ **/
+
+#include <linux/time.h>
+#include <linux/string.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/buffer_head.h>
+
+/* To make any changes in the tree we find a node, that contains item
+   to be changed/deleted or position in the node we insert a new item
+   to. We call this node S. To do balancing we need to decide what we
+   will shift to left/right neighbor, or to a new node, where new item
+   will be etc. To make this analysis simpler we build virtual
+   node. Virtual node is an array of items, that will replace items of
+   node S. (For instance if we are going to delete an item, virtual
+   node does not contain it). Virtual node keeps information about
+   item sizes and types, mergeability of first and last items, sizes
+   of all entries in directory item. We use this array of items when
+   calculating what we can shift to neighbors and how many nodes we
+   have to have if we do not any shiftings, if we shift to left/right
+   neighbor or to both. */
+
+/* taking item number in virtual node, returns number of item, that it has in source buffer */
+static inline int old_item_num(int new_num, int affected_item_num, int mode)
+{
+	if (mode == M_PASTE || mode == M_CUT || new_num < affected_item_num)
+		return new_num;
+
+	if (mode == M_INSERT) {
+
+		RFALSE(new_num == 0,
+		       "vs-8005: for INSERT mode and item number of inserted item");
+
+		return new_num - 1;
+	}
+
+	RFALSE(mode != M_DELETE,
+	       "vs-8010: old_item_num: mode must be M_DELETE (mode = \'%c\'",
+	       mode);
+	/* delete mode */
+	return new_num + 1;
+}
+
+static void create_virtual_node(struct tree_balance *tb, int h)
+{
+	struct item_head *ih;
+	struct virtual_node *vn = tb->tb_vn;
+	int new_num;
+	struct buffer_head *Sh;	/* this comes from tb->S[h] */
+
+	Sh = PATH_H_PBUFFER(tb->tb_path, h);
+
+	/* size of changed node */
+	vn->vn_size =
+	    MAX_CHILD_SIZE(Sh) - B_FREE_SPACE(Sh) + tb->insert_size[h];
+
+	/* for internal nodes array if virtual items is not created */
+	if (h) {
+		vn->vn_nr_item = (vn->vn_size - DC_SIZE) / (DC_SIZE + KEY_SIZE);
+		return;
+	}
+
+	/* number of items in virtual node  */
+	vn->vn_nr_item =
+	    B_NR_ITEMS(Sh) + ((vn->vn_mode == M_INSERT) ? 1 : 0) -
+	    ((vn->vn_mode == M_DELETE) ? 1 : 0);
+
+	/* first virtual item */
+	vn->vn_vi = (struct virtual_item *)(tb->tb_vn + 1);
+	memset(vn->vn_vi, 0, vn->vn_nr_item * sizeof(struct virtual_item));
+	vn->vn_free_ptr += vn->vn_nr_item * sizeof(struct virtual_item);
+
+	/* first item in the node */
+	ih = B_N_PITEM_HEAD(Sh, 0);
+
+	/* define the mergeability for 0-th item (if it is not being deleted) */
+	if (op_is_left_mergeable(&(ih->ih_key), Sh->b_size)
+	    && (vn->vn_mode != M_DELETE || vn->vn_affected_item_num))
+		vn->vn_vi[0].vi_type |= VI_TYPE_LEFT_MERGEABLE;
+
+	/* go through all items those remain in the virtual node (except for the new (inserted) one) */
+	for (new_num = 0; new_num < vn->vn_nr_item; new_num++) {
+		int j;
+		struct virtual_item *vi = vn->vn_vi + new_num;
+		int is_affected =
+		    ((new_num != vn->vn_affected_item_num) ? 0 : 1);
+
+		if (is_affected && vn->vn_mode == M_INSERT)
+			continue;
+
+		/* get item number in source node */
+		j = old_item_num(new_num, vn->vn_affected_item_num,
+				 vn->vn_mode);
+
+		vi->vi_item_len += ih_item_len(ih + j) + IH_SIZE;
+		vi->vi_ih = ih + j;
+		vi->vi_item = B_I_PITEM(Sh, ih + j);
+		vi->vi_uarea = vn->vn_free_ptr;
+
+		// FIXME: there is no check, that item operation did not
+		// consume too much memory
+		vn->vn_free_ptr +=
+		    op_create_vi(vn, vi, is_affected, tb->insert_size[0]);
+		if (tb->vn_buf + tb->vn_buf_size < vn->vn_free_ptr)
+			reiserfs_panic(tb->tb_sb,
+				       "vs-8030: create_virtual_node: "
+				       "virtual node space consumed");
+
+		if (!is_affected)
+			/* this is not being changed */
+			continue;
+
+		if (vn->vn_mode == M_PASTE || vn->vn_mode == M_CUT) {
+			vn->vn_vi[new_num].vi_item_len += tb->insert_size[0];
+			vi->vi_new_data = vn->vn_data;	// pointer to data which is going to be pasted
+		}
+	}
+
+	/* virtual inserted item is not defined yet */
+	if (vn->vn_mode == M_INSERT) {
+		struct virtual_item *vi = vn->vn_vi + vn->vn_affected_item_num;
+
+		RFALSE(vn->vn_ins_ih == NULL,
+		       "vs-8040: item header of inserted item is not specified");
+		vi->vi_item_len = tb->insert_size[0];
+		vi->vi_ih = vn->vn_ins_ih;
+		vi->vi_item = vn->vn_data;
+		vi->vi_uarea = vn->vn_free_ptr;
+
+		op_create_vi(vn, vi, 0 /*not pasted or cut */ ,
+			     tb->insert_size[0]);
+	}
+
+	/* set right merge flag we take right delimiting key and check whether it is a mergeable item */
+	if (tb->CFR[0]) {
+		struct reiserfs_key *key;
+
+		key = B_N_PDELIM_KEY(tb->CFR[0], tb->rkey[0]);
+		if (op_is_left_mergeable(key, Sh->b_size)
+		    && (vn->vn_mode != M_DELETE
+			|| vn->vn_affected_item_num != B_NR_ITEMS(Sh) - 1))
+			vn->vn_vi[vn->vn_nr_item - 1].vi_type |=
+			    VI_TYPE_RIGHT_MERGEABLE;
+
+#ifdef CONFIG_REISERFS_CHECK
+		if (op_is_left_mergeable(key, Sh->b_size) &&
+		    !(vn->vn_mode != M_DELETE
+		      || vn->vn_affected_item_num != B_NR_ITEMS(Sh) - 1)) {
+			/* we delete last item and it could be merged with right neighbor's first item */
+			if (!
+			    (B_NR_ITEMS(Sh) == 1
+			     && is_direntry_le_ih(B_N_PITEM_HEAD(Sh, 0))
+			     && I_ENTRY_COUNT(B_N_PITEM_HEAD(Sh, 0)) == 1)) {
+				/* node contains more than 1 item, or item is not directory item, or this item contains more than 1 entry */
+				print_block(Sh, 0, -1, -1);
+				reiserfs_panic(tb->tb_sb,
+					       "vs-8045: create_virtual_node: rdkey %k, affected item==%d (mode==%c) Must be %c",
+					       key, vn->vn_affected_item_num,
+					       vn->vn_mode, M_DELETE);
+			}
+		}
+#endif
+
+	}
+}
+
+/* using virtual node check, how many items can be shifted to left
+   neighbor */
+static void check_left(struct tree_balance *tb, int h, int cur_free)
+{
+	int i;
+	struct virtual_node *vn = tb->tb_vn;
+	struct virtual_item *vi;
+	int d_size, ih_size;
+
+	RFALSE(cur_free < 0, "vs-8050: cur_free (%d) < 0", cur_free);
+
+	/* internal level */
+	if (h > 0) {
+		tb->lnum[h] = cur_free / (DC_SIZE + KEY_SIZE);
+		return;
+	}
+
+	/* leaf level */
+
+	if (!cur_free || !vn->vn_nr_item) {
+		/* no free space or nothing to move */
+		tb->lnum[h] = 0;
+		tb->lbytes = -1;
+		return;
+	}
+
+	RFALSE(!PATH_H_PPARENT(tb->tb_path, 0),
+	       "vs-8055: parent does not exist or invalid");
+
+	vi = vn->vn_vi;
+	if ((unsigned int)cur_free >=
+	    (vn->vn_size -
+	     ((vi->vi_type & VI_TYPE_LEFT_MERGEABLE) ? IH_SIZE : 0))) {
+		/* all contents of S[0] fits into L[0] */
+
+		RFALSE(vn->vn_mode == M_INSERT || vn->vn_mode == M_PASTE,
+		       "vs-8055: invalid mode or balance condition failed");
+
+		tb->lnum[0] = vn->vn_nr_item;
+		tb->lbytes = -1;
+		return;
+	}
+
+	d_size = 0, ih_size = IH_SIZE;
+
+	/* first item may be merge with last item in left neighbor */
+	if (vi->vi_type & VI_TYPE_LEFT_MERGEABLE)
+		d_size = -((int)IH_SIZE), ih_size = 0;
+
+	tb->lnum[0] = 0;
+	for (i = 0; i < vn->vn_nr_item;
+	     i++, ih_size = IH_SIZE, d_size = 0, vi++) {
+		d_size += vi->vi_item_len;
+		if (cur_free >= d_size) {
+			/* the item can be shifted entirely */
+			cur_free -= d_size;
+			tb->lnum[0]++;
+			continue;
+		}
+
+		/* the item cannot be shifted entirely, try to split it */
+		/* check whether L[0] can hold ih and at least one byte of the item body */
+		if (cur_free <= ih_size) {
+			/* cannot shift even a part of the current item */
+			tb->lbytes = -1;
+			return;
+		}
+		cur_free -= ih_size;
+
+		tb->lbytes = op_check_left(vi, cur_free, 0, 0);
+		if (tb->lbytes != -1)
+			/* count partially shifted item */
+			tb->lnum[0]++;
+
+		break;
+	}
+
+	return;
+}
+
+/* using virtual node check, how many items can be shifted to right
+   neighbor */
+static void check_right(struct tree_balance *tb, int h, int cur_free)
+{
+	int i;
+	struct virtual_node *vn = tb->tb_vn;
+	struct virtual_item *vi;
+	int d_size, ih_size;
+
+	RFALSE(cur_free < 0, "vs-8070: cur_free < 0");
+
+	/* internal level */
+	if (h > 0) {
+		tb->rnum[h] = cur_free / (DC_SIZE + KEY_SIZE);
+		return;
+	}
+
+	/* leaf level */
+
+	if (!cur_free || !vn->vn_nr_item) {
+		/* no free space  */
+		tb->rnum[h] = 0;
+		tb->rbytes = -1;
+		return;
+	}
+
+	RFALSE(!PATH_H_PPARENT(tb->tb_path, 0),
+	       "vs-8075: parent does not exist or invalid");
+
+	vi = vn->vn_vi + vn->vn_nr_item - 1;
+	if ((unsigned int)cur_free >=
+	    (vn->vn_size -
+	     ((vi->vi_type & VI_TYPE_RIGHT_MERGEABLE) ? IH_SIZE : 0))) {
+		/* all contents of S[0] fits into R[0] */
+
+		RFALSE(vn->vn_mode == M_INSERT || vn->vn_mode == M_PASTE,
+		       "vs-8080: invalid mode or balance condition failed");
+
+		tb->rnum[h] = vn->vn_nr_item;
+		tb->rbytes = -1;
+		return;
+	}
+
+	d_size = 0, ih_size = IH_SIZE;
+
+	/* last item may be merge with first item in right neighbor */
+	if (vi->vi_type & VI_TYPE_RIGHT_MERGEABLE)
+		d_size = -(int)IH_SIZE, ih_size = 0;
+
+	tb->rnum[0] = 0;
+	for (i = vn->vn_nr_item - 1; i >= 0;
+	     i--, d_size = 0, ih_size = IH_SIZE, vi--) {
+		d_size += vi->vi_item_len;
+		if (cur_free >= d_size) {
+			/* the item can be shifted entirely */
+			cur_free -= d_size;
+			tb->rnum[0]++;
+			continue;
+		}
+
+		/* check whether R[0] can hold ih and at least one byte of the item body */
+		if (cur_free <= ih_size) {	/* cannot shift even a part of the current item */
+			tb->rbytes = -1;
+			return;
+		}
+
+		/* R[0] can hold the header of the item and at least one byte of its body */
+		cur_free -= ih_size;	/* cur_free is still > 0 */
+
+		tb->rbytes = op_check_right(vi, cur_free);
+		if (tb->rbytes != -1)
+			/* count partially shifted item */
+			tb->rnum[0]++;
+
+		break;
+	}
+
+	return;
+}
+
+/*
+ * from - number of items, which are shifted to left neighbor entirely
+ * to - number of item, which are shifted to right neighbor entirely
+ * from_bytes - number of bytes of boundary item (or directory entries) which are shifted to left neighbor
+ * to_bytes - number of bytes of boundary item (or directory entries) which are shifted to right neighbor */
+static int get_num_ver(int mode, struct tree_balance *tb, int h,
+		       int from, int from_bytes,
+		       int to, int to_bytes, short *snum012, int flow)
+{
+	int i;
+	int cur_free;
+	//    int bytes;
+	int units;
+	struct virtual_node *vn = tb->tb_vn;
+	//    struct virtual_item * vi;
+
+	int total_node_size, max_node_size, current_item_size;
+	int needed_nodes;
+	int start_item,		/* position of item we start filling node from */
+	 end_item,		/* position of item we finish filling node by */
+	 start_bytes,		/* number of first bytes (entries for directory) of start_item-th item 
+				   we do not include into node that is being filled */
+	 end_bytes;		/* number of last bytes (entries for directory) of end_item-th item 
+				   we do node include into node that is being filled */
+	int split_item_positions[2];	/* these are positions in virtual item of
+					   items, that are split between S[0] and
+					   S1new and S1new and S2new */
+
+	split_item_positions[0] = -1;
+	split_item_positions[1] = -1;
+
+	/* We only create additional nodes if we are in insert or paste mode
+	   or we are in replace mode at the internal level. If h is 0 and
+	   the mode is M_REPLACE then in fix_nodes we change the mode to
+	   paste or insert before we get here in the code.  */
+	RFALSE(tb->insert_size[h] < 0 || (mode != M_INSERT && mode != M_PASTE),
+	       "vs-8100: insert_size < 0 in overflow");
+
+	max_node_size = MAX_CHILD_SIZE(PATH_H_PBUFFER(tb->tb_path, h));
+
+	/* snum012 [0-2] - number of items, that lay
+	   to S[0], first new node and second new node */
+	snum012[3] = -1;	/* s1bytes */
+	snum012[4] = -1;	/* s2bytes */
+
+	/* internal level */
+	if (h > 0) {
+		i = ((to - from) * (KEY_SIZE + DC_SIZE) + DC_SIZE);
+		if (i == max_node_size)
+			return 1;
+		return (i / max_node_size + 1);
+	}
+
+	/* leaf level */
+	needed_nodes = 1;
+	total_node_size = 0;
+	cur_free = max_node_size;
+
+	// start from 'from'-th item
+	start_item = from;
+	// skip its first 'start_bytes' units
+	start_bytes = ((from_bytes != -1) ? from_bytes : 0);
+
+	// last included item is the 'end_item'-th one
+	end_item = vn->vn_nr_item - to - 1;
+	// do not count last 'end_bytes' units of 'end_item'-th item
+	end_bytes = (to_bytes != -1) ? to_bytes : 0;
+
+	/* go through all item beginning from the start_item-th item and ending by
+	   the end_item-th item. Do not count first 'start_bytes' units of
+	   'start_item'-th item and last 'end_bytes' of 'end_item'-th item */
+
+	for (i = start_item; i <= end_item; i++) {
+		struct virtual_item *vi = vn->vn_vi + i;
+		int skip_from_end = ((i == end_item) ? end_bytes : 0);
+
+		RFALSE(needed_nodes > 3, "vs-8105: too many nodes are needed");
+
+		/* get size of current item */
+		current_item_size = vi->vi_item_len;
+
+		/* do not take in calculation head part (from_bytes) of from-th item */
+		current_item_size -=
+		    op_part_size(vi, 0 /*from start */ , start_bytes);
+
+		/* do not take in calculation tail part of last item */
+		current_item_size -=
+		    op_part_size(vi, 1 /*from end */ , skip_from_end);
+
+		/* if item fits into current node entierly */
+		if (total_node_size + current_item_size <= max_node_size) {
+			snum012[needed_nodes - 1]++;
+			total_node_size += current_item_size;
+			start_bytes = 0;
+			continue;
+		}
+
+		if (current_item_size > max_node_size) {
+			/* virtual item length is longer, than max size of item in
+			   a node. It is impossible for direct item */
+			RFALSE(is_direct_le_ih(vi->vi_ih),
+			       "vs-8110: "
+			       "direct item length is %d. It can not be longer than %d",
+			       current_item_size, max_node_size);
+			/* we will try to split it */
+			flow = 1;
+		}
+
+		if (!flow) {
+			/* as we do not split items, take new node and continue */
+			needed_nodes++;
+			i--;
+			total_node_size = 0;
+			continue;
+		}
+		// calculate number of item units which fit into node being
+		// filled
+		{
+			int free_space;
+
+			free_space = max_node_size - total_node_size - IH_SIZE;
+			units =
+			    op_check_left(vi, free_space, start_bytes,
+					  skip_from_end);
+			if (units == -1) {
+				/* nothing fits into current node, take new node and continue */
+				needed_nodes++, i--, total_node_size = 0;
+				continue;
+			}
+		}
+
+		/* something fits into the current node */
+		//if (snum012[3] != -1 || needed_nodes != 1)
+		//  reiserfs_panic (tb->tb_sb, "vs-8115: get_num_ver: too many nodes required");
+		//snum012[needed_nodes - 1 + 3] = op_unit_num (vi) - start_bytes - units;
+		start_bytes += units;
+		snum012[needed_nodes - 1 + 3] = units;
+
+		if (needed_nodes > 2)
+			reiserfs_warning(tb->tb_sb, "vs-8111: get_num_ver: "
+					 "split_item_position is out of boundary");
+		snum012[needed_nodes - 1]++;
+		split_item_positions[needed_nodes - 1] = i;
+		needed_nodes++;
+		/* continue from the same item with start_bytes != -1 */
+		start_item = i;
+		i--;
+		total_node_size = 0;
+	}
+
+	// sum012[4] (if it is not -1) contains number of units of which
+	// are to be in S1new, snum012[3] - to be in S0. They are supposed
+	// to be S1bytes and S2bytes correspondingly, so recalculate
+	if (snum012[4] > 0) {
+		int split_item_num;
+		int bytes_to_r, bytes_to_l;
+		int bytes_to_S1new;
+
+		split_item_num = split_item_positions[1];
+		bytes_to_l =
+		    ((from == split_item_num
+		      && from_bytes != -1) ? from_bytes : 0);
+		bytes_to_r =
+		    ((end_item == split_item_num
+		      && end_bytes != -1) ? end_bytes : 0);
+		bytes_to_S1new =
+		    ((split_item_positions[0] ==
+		      split_item_positions[1]) ? snum012[3] : 0);
+
+		// s2bytes
+		snum012[4] =
+		    op_unit_num(&vn->vn_vi[split_item_num]) - snum012[4] -
+		    bytes_to_r - bytes_to_l - bytes_to_S1new;
+
+		if (vn->vn_vi[split_item_num].vi_index != TYPE_DIRENTRY &&
+		    vn->vn_vi[split_item_num].vi_index != TYPE_INDIRECT)
+			reiserfs_warning(tb->tb_sb, "vs-8115: get_num_ver: not "
+					 "directory or indirect item");
+	}
+
+	/* now we know S2bytes, calculate S1bytes */
+	if (snum012[3] > 0) {
+		int split_item_num;
+		int bytes_to_r, bytes_to_l;
+		int bytes_to_S2new;
+
+		split_item_num = split_item_positions[0];
+		bytes_to_l =
+		    ((from == split_item_num
+		      && from_bytes != -1) ? from_bytes : 0);
+		bytes_to_r =
+		    ((end_item == split_item_num
+		      && end_bytes != -1) ? end_bytes : 0);
+		bytes_to_S2new =
+		    ((split_item_positions[0] == split_item_positions[1]
+		      && snum012[4] != -1) ? snum012[4] : 0);
+
+		// s1bytes
+		snum012[3] =
+		    op_unit_num(&vn->vn_vi[split_item_num]) - snum012[3] -
+		    bytes_to_r - bytes_to_l - bytes_to_S2new;
+	}
+
+	return needed_nodes;
+}
+
+#ifdef CONFIG_REISERFS_CHECK
+extern struct tree_balance *cur_tb;
+#endif
+
+/* Set parameters for balancing.
+ * Performs write of results of analysis of balancing into structure tb,
+ * where it will later be used by the functions that actually do the balancing. 
+ * Parameters:
+ *	tb	tree_balance structure;
+ *	h	current level of the node;
+ *	lnum	number of items from S[h] that must be shifted to L[h];
+ *	rnum	number of items from S[h] that must be shifted to R[h];
+ *	blk_num	number of blocks that S[h] will be splitted into;
+ *	s012	number of items that fall into splitted nodes.
+ *	lbytes	number of bytes which flow to the left neighbor from the item that is not
+ *		not shifted entirely
+ *	rbytes	number of bytes which flow to the right neighbor from the item that is not
+ *		not shifted entirely
+ *	s1bytes	number of bytes which flow to the first  new node when S[0] splits (this number is contained in s012 array)
+ */
+
+static void set_parameters(struct tree_balance *tb, int h, int lnum,
+			   int rnum, int blk_num, short *s012, int lb, int rb)
+{
+
+	tb->lnum[h] = lnum;
+	tb->rnum[h] = rnum;
+	tb->blknum[h] = blk_num;
+
+	if (h == 0) {		/* only for leaf level */
+		if (s012 != NULL) {
+			tb->s0num = *s012++,
+			    tb->s1num = *s012++, tb->s2num = *s012++;
+			tb->s1bytes = *s012++;
+			tb->s2bytes = *s012;
+		}
+		tb->lbytes = lb;
+		tb->rbytes = rb;
+	}
+	PROC_INFO_ADD(tb->tb_sb, lnum[h], lnum);
+	PROC_INFO_ADD(tb->tb_sb, rnum[h], rnum);
+
+	PROC_INFO_ADD(tb->tb_sb, lbytes[h], lb);
+	PROC_INFO_ADD(tb->tb_sb, rbytes[h], rb);
+}
+
+/* check, does node disappear if we shift tb->lnum[0] items to left
+   neighbor and tb->rnum[0] to the right one. */
+static int is_leaf_removable(struct tree_balance *tb)
+{
+	struct virtual_node *vn = tb->tb_vn;
+	int to_left, to_right;
+	int size;
+	int remain_items;
+
+	/* number of items, that will be shifted to left (right) neighbor
+	   entirely */
+	to_left = tb->lnum[0] - ((tb->lbytes != -1) ? 1 : 0);
+	to_right = tb->rnum[0] - ((tb->rbytes != -1) ? 1 : 0);
+	remain_items = vn->vn_nr_item;
+
+	/* how many items remain in S[0] after shiftings to neighbors */
+	remain_items -= (to_left + to_right);
+
+	if (remain_items < 1) {
+		/* all content of node can be shifted to neighbors */
+		set_parameters(tb, 0, to_left, vn->vn_nr_item - to_left, 0,
+			       NULL, -1, -1);
+		return 1;
+	}
+
+	if (remain_items > 1 || tb->lbytes == -1 || tb->rbytes == -1)
+		/* S[0] is not removable */
+		return 0;
+
+	/* check, whether we can divide 1 remaining item between neighbors */
+
+	/* get size of remaining item (in item units) */
+	size = op_unit_num(&(vn->vn_vi[to_left]));
+
+	if (tb->lbytes + tb->rbytes >= size) {
+		set_parameters(tb, 0, to_left + 1, to_right + 1, 0, NULL,
+			       tb->lbytes, -1);
+		return 1;
+	}
+
+	return 0;
+}
+
+/* check whether L, S, R can be joined in one node */
+static int are_leaves_removable(struct tree_balance *tb, int lfree, int rfree)
+{
+	struct virtual_node *vn = tb->tb_vn;
+	int ih_size;
+	struct buffer_head *S0;
+
+	S0 = PATH_H_PBUFFER(tb->tb_path, 0);
+
+	ih_size = 0;
+	if (vn->vn_nr_item) {
+		if (vn->vn_vi[0].vi_type & VI_TYPE_LEFT_MERGEABLE)
+			ih_size += IH_SIZE;
+
+		if (vn->vn_vi[vn->vn_nr_item - 1].
+		    vi_type & VI_TYPE_RIGHT_MERGEABLE)
+			ih_size += IH_SIZE;
+	} else {
+		/* there was only one item and it will be deleted */
+		struct item_head *ih;
+
+		RFALSE(B_NR_ITEMS(S0) != 1,
+		       "vs-8125: item number must be 1: it is %d",
+		       B_NR_ITEMS(S0));
+
+		ih = B_N_PITEM_HEAD(S0, 0);
+		if (tb->CFR[0]
+		    && !comp_short_le_keys(&(ih->ih_key),
+					   B_N_PDELIM_KEY(tb->CFR[0],
+							  tb->rkey[0])))
+			if (is_direntry_le_ih(ih)) {
+				/* Directory must be in correct state here: that is
+				   somewhere at the left side should exist first directory
+				   item. But the item being deleted can not be that first
+				   one because its right neighbor is item of the same
+				   directory. (But first item always gets deleted in last
+				   turn). So, neighbors of deleted item can be merged, so
+				   we can save ih_size */
+				ih_size = IH_SIZE;
+
+				/* we might check that left neighbor exists and is of the
+				   same directory */
+				RFALSE(le_ih_k_offset(ih) == DOT_OFFSET,
+				       "vs-8130: first directory item can not be removed until directory is not empty");
+			}
+
+	}
+
+	if (MAX_CHILD_SIZE(S0) + vn->vn_size <= rfree + lfree + ih_size) {
+		set_parameters(tb, 0, -1, -1, -1, NULL, -1, -1);
+		PROC_INFO_INC(tb->tb_sb, leaves_removable);
+		return 1;
+	}
+	return 0;
+
+}
+
+/* when we do not split item, lnum and rnum are numbers of entire items */
+#define SET_PAR_SHIFT_LEFT \
+if (h)\
+{\
+   int to_l;\
+   \
+   to_l = (MAX_NR_KEY(Sh)+1 - lpar + vn->vn_nr_item + 1) / 2 -\
+	      (MAX_NR_KEY(Sh) + 1 - lpar);\
+	      \
+	      set_parameters (tb, h, to_l, 0, lnver, NULL, -1, -1);\
+}\
+else \
+{\
+   if (lset==LEFT_SHIFT_FLOW)\
+     set_parameters (tb, h, lpar, 0, lnver, snum012+lset,\
+		     tb->lbytes, -1);\
+   else\
+     set_parameters (tb, h, lpar - (tb->lbytes!=-1), 0, lnver, snum012+lset,\
+		     -1, -1);\
+}
+
+#define SET_PAR_SHIFT_RIGHT \
+if (h)\
+{\
+   int to_r;\
+   \
+   to_r = (MAX_NR_KEY(Sh)+1 - rpar + vn->vn_nr_item + 1) / 2 - (MAX_NR_KEY(Sh) + 1 - rpar);\
+   \
+   set_parameters (tb, h, 0, to_r, rnver, NULL, -1, -1);\
+}\
+else \
+{\
+   if (rset==RIGHT_SHIFT_FLOW)\
+     set_parameters (tb, h, 0, rpar, rnver, snum012+rset,\
+		  -1, tb->rbytes);\
+   else\
+     set_parameters (tb, h, 0, rpar - (tb->rbytes!=-1), rnver, snum012+rset,\
+		  -1, -1);\
+}
+
+static void free_buffers_in_tb(struct tree_balance *p_s_tb)
+{
+	int n_counter;
+
+	decrement_counters_in_path(p_s_tb->tb_path);
+
+	for (n_counter = 0; n_counter < MAX_HEIGHT; n_counter++) {
+		decrement_bcount(p_s_tb->L[n_counter]);
+		p_s_tb->L[n_counter] = NULL;
+		decrement_bcount(p_s_tb->R[n_counter]);
+		p_s_tb->R[n_counter] = NULL;
+		decrement_bcount(p_s_tb->FL[n_counter]);
+		p_s_tb->FL[n_counter] = NULL;
+		decrement_bcount(p_s_tb->FR[n_counter]);
+		p_s_tb->FR[n_counter] = NULL;
+		decrement_bcount(p_s_tb->CFL[n_counter]);
+		p_s_tb->CFL[n_counter] = NULL;
+		decrement_bcount(p_s_tb->CFR[n_counter]);
+		p_s_tb->CFR[n_counter] = NULL;
+	}
+}
+
+/* Get new buffers for storing new nodes that are created while balancing.
+ * Returns:	SCHEDULE_OCCURRED - schedule occurred while the function worked;
+ *	        CARRY_ON - schedule didn't occur while the function worked;
+ *	        NO_DISK_SPACE - no disk space.
+ */
+/* The function is NOT SCHEDULE-SAFE! */
+static int get_empty_nodes(struct tree_balance *p_s_tb, int n_h)
+{
+	struct buffer_head *p_s_new_bh,
+	    *p_s_Sh = PATH_H_PBUFFER(p_s_tb->tb_path, n_h);
+	b_blocknr_t *p_n_blocknr, a_n_blocknrs[MAX_AMOUNT_NEEDED] = { 0, };
+	int n_counter, n_number_of_freeblk, n_amount_needed,	/* number of needed empty blocks */
+	 n_retval = CARRY_ON;
+	struct super_block *p_s_sb = p_s_tb->tb_sb;
+
+	/* number_of_freeblk is the number of empty blocks which have been
+	   acquired for use by the balancing algorithm minus the number of
+	   empty blocks used in the previous levels of the analysis,
+	   number_of_freeblk = tb->cur_blknum can be non-zero if a schedule occurs
+	   after empty blocks are acquired, and the balancing analysis is
+	   then restarted, amount_needed is the number needed by this level
+	   (n_h) of the balancing analysis.
+
+	   Note that for systems with many processes writing, it would be
+	   more layout optimal to calculate the total number needed by all
+	   levels and then to run reiserfs_new_blocks to get all of them at once.  */
+
+	/* Initiate number_of_freeblk to the amount acquired prior to the restart of
+	   the analysis or 0 if not restarted, then subtract the amount needed
+	   by all of the levels of the tree below n_h. */
+	/* blknum includes S[n_h], so we subtract 1 in this calculation */
+	for (n_counter = 0, n_number_of_freeblk = p_s_tb->cur_blknum;
+	     n_counter < n_h; n_counter++)
+		n_number_of_freeblk -=
+		    (p_s_tb->blknum[n_counter]) ? (p_s_tb->blknum[n_counter] -
+						   1) : 0;
+
+	/* Allocate missing empty blocks. */
+	/* if p_s_Sh == 0  then we are getting a new root */
+	n_amount_needed = (p_s_Sh) ? (p_s_tb->blknum[n_h] - 1) : 1;
+	/*  Amount_needed = the amount that we need more than the amount that we have. */
+	if (n_amount_needed > n_number_of_freeblk)
+		n_amount_needed -= n_number_of_freeblk;
+	else			/* If we have enough already then there is nothing to do. */
+		return CARRY_ON;
+
+	/* No need to check quota - is not allocated for blocks used for formatted nodes */
+	if (reiserfs_new_form_blocknrs(p_s_tb, a_n_blocknrs,
+				       n_amount_needed) == NO_DISK_SPACE)
+		return NO_DISK_SPACE;
+
+	/* for each blocknumber we just got, get a buffer and stick it on FEB */
+	for (p_n_blocknr = a_n_blocknrs, n_counter = 0;
+	     n_counter < n_amount_needed; p_n_blocknr++, n_counter++) {
+
+		RFALSE(!*p_n_blocknr,
+		       "PAP-8135: reiserfs_new_blocknrs failed when got new blocks");
+
+		p_s_new_bh = sb_getblk(p_s_sb, *p_n_blocknr);
+		RFALSE(buffer_dirty(p_s_new_bh) ||
+		       buffer_journaled(p_s_new_bh) ||
+		       buffer_journal_dirty(p_s_new_bh),
+		       "PAP-8140: journlaled or dirty buffer %b for the new block",
+		       p_s_new_bh);
+
+		/* Put empty buffers into the array. */
+		RFALSE(p_s_tb->FEB[p_s_tb->cur_blknum],
+		       "PAP-8141: busy slot for new buffer");
+
+		set_buffer_journal_new(p_s_new_bh);
+		p_s_tb->FEB[p_s_tb->cur_blknum++] = p_s_new_bh;
+	}
+
+	if (n_retval == CARRY_ON && FILESYSTEM_CHANGED_TB(p_s_tb))
+		n_retval = REPEAT_SEARCH;
+
+	return n_retval;
+}
+
+/* Get free space of the left neighbor, which is stored in the parent
+ * node of the left neighbor.  */
+static int get_lfree(struct tree_balance *tb, int h)
+{
+	struct buffer_head *l, *f;
+	int order;
+
+	if ((f = PATH_H_PPARENT(tb->tb_path, h)) == NULL ||
+	    (l = tb->FL[h]) == NULL)
+		return 0;
+
+	if (f == l)
+		order = PATH_H_B_ITEM_ORDER(tb->tb_path, h) - 1;
+	else {
+		order = B_NR_ITEMS(l);
+		f = l;
+	}
+
+	return (MAX_CHILD_SIZE(f) - dc_size(B_N_CHILD(f, order)));
+}
+
+/* Get free space of the right neighbor,
+ * which is stored in the parent node of the right neighbor.
+ */
+static int get_rfree(struct tree_balance *tb, int h)
+{
+	struct buffer_head *r, *f;
+	int order;
+
+	if ((f = PATH_H_PPARENT(tb->tb_path, h)) == NULL ||
+	    (r = tb->FR[h]) == NULL)
+		return 0;
+
+	if (f == r)
+		order = PATH_H_B_ITEM_ORDER(tb->tb_path, h) + 1;
+	else {
+		order = 0;
+		f = r;
+	}
+
+	return (MAX_CHILD_SIZE(f) - dc_size(B_N_CHILD(f, order)));
+
+}
+
+/* Check whether left neighbor is in memory. */
+static int is_left_neighbor_in_cache(struct tree_balance *p_s_tb, int n_h)
+{
+	struct buffer_head *p_s_father, *left;
+	struct super_block *p_s_sb = p_s_tb->tb_sb;
+	b_blocknr_t n_left_neighbor_blocknr;
+	int n_left_neighbor_position;
+
+	if (!p_s_tb->FL[n_h])	/* Father of the left neighbor does not exist. */
+		return 0;
+
+	/* Calculate father of the node to be balanced. */
+	p_s_father = PATH_H_PBUFFER(p_s_tb->tb_path, n_h + 1);
+
+	RFALSE(!p_s_father ||
+	       !B_IS_IN_TREE(p_s_father) ||
+	       !B_IS_IN_TREE(p_s_tb->FL[n_h]) ||
+	       !buffer_uptodate(p_s_father) ||
+	       !buffer_uptodate(p_s_tb->FL[n_h]),
+	       "vs-8165: F[h] (%b) or FL[h] (%b) is invalid",
+	       p_s_father, p_s_tb->FL[n_h]);
+
+	/* Get position of the pointer to the left neighbor into the left father. */
+	n_left_neighbor_position = (p_s_father == p_s_tb->FL[n_h]) ?
+	    p_s_tb->lkey[n_h] : B_NR_ITEMS(p_s_tb->FL[n_h]);
+	/* Get left neighbor block number. */
+	n_left_neighbor_blocknr =
+	    B_N_CHILD_NUM(p_s_tb->FL[n_h], n_left_neighbor_position);
+	/* Look for the left neighbor in the cache. */
+	if ((left = sb_find_get_block(p_s_sb, n_left_neighbor_blocknr))) {
+
+		RFALSE(buffer_uptodate(left) && !B_IS_IN_TREE(left),
+		       "vs-8170: left neighbor (%b %z) is not in the tree",
+		       left, left);
+		put_bh(left);
+		return 1;
+	}
+
+	return 0;
+}
+
+#define LEFT_PARENTS  'l'
+#define RIGHT_PARENTS 'r'
+
+static void decrement_key(struct cpu_key *p_s_key)
+{
+	// call item specific function for this key
+	item_ops[cpu_key_k_type(p_s_key)]->decrement_key(p_s_key);
+}
+
+/* Calculate far left/right parent of the left/right neighbor of the current node, that
+ * is calculate the left/right (FL[h]/FR[h]) neighbor of the parent F[h].
+ * Calculate left/right common parent of the current node and L[h]/R[h].
+ * Calculate left/right delimiting key position.
+ * Returns:	PATH_INCORRECT   - path in the tree is not correct;
+ 		SCHEDULE_OCCURRED - schedule occurred while the function worked;
+ *	        CARRY_ON         - schedule didn't occur while the function worked;
+ */
+static int get_far_parent(struct tree_balance *p_s_tb,
+			  int n_h,
+			  struct buffer_head **pp_s_father,
+			  struct buffer_head **pp_s_com_father, char c_lr_par)
+{
+	struct buffer_head *p_s_parent;
+	INITIALIZE_PATH(s_path_to_neighbor_father);
+	struct treepath *p_s_path = p_s_tb->tb_path;
+	struct cpu_key s_lr_father_key;
+	int n_counter,
+	    n_position = INT_MAX,
+	    n_first_last_position = 0,
+	    n_path_offset = PATH_H_PATH_OFFSET(p_s_path, n_h);
+
+	/* Starting from F[n_h] go upwards in the tree, and look for the common
+	   ancestor of F[n_h], and its neighbor l/r, that should be obtained. */
+
+	n_counter = n_path_offset;
+
+	RFALSE(n_counter < FIRST_PATH_ELEMENT_OFFSET,
+	       "PAP-8180: invalid path length");
+
+	for (; n_counter > FIRST_PATH_ELEMENT_OFFSET; n_counter--) {
+		/* Check whether parent of the current buffer in the path is really parent in the tree. */
+		if (!B_IS_IN_TREE
+		    (p_s_parent = PATH_OFFSET_PBUFFER(p_s_path, n_counter - 1)))
+			return REPEAT_SEARCH;
+		/* Check whether position in the parent is correct. */
+		if ((n_position =
+		     PATH_OFFSET_POSITION(p_s_path,
+					  n_counter - 1)) >
+		    B_NR_ITEMS(p_s_parent))
+			return REPEAT_SEARCH;
+		/* Check whether parent at the path really points to the child. */
+		if (B_N_CHILD_NUM(p_s_parent, n_position) !=
+		    PATH_OFFSET_PBUFFER(p_s_path, n_counter)->b_blocknr)
+			return REPEAT_SEARCH;
+		/* Return delimiting key if position in the parent is not equal to first/last one. */
+		if (c_lr_par == RIGHT_PARENTS)
+			n_first_last_position = B_NR_ITEMS(p_s_parent);
+		if (n_position != n_first_last_position) {
+			*pp_s_com_father = p_s_parent;
+			get_bh(*pp_s_com_father);
+			/*(*pp_s_com_father = p_s_parent)->b_count++; */
+			break;
+		}
+	}
+
+	/* if we are in the root of the tree, then there is no common father */
+	if (n_counter == FIRST_PATH_ELEMENT_OFFSET) {
+		/* Check whether first buffer in the path is the root of the tree. */
+		if (PATH_OFFSET_PBUFFER
+		    (p_s_tb->tb_path,
+		     FIRST_PATH_ELEMENT_OFFSET)->b_blocknr ==
+		    SB_ROOT_BLOCK(p_s_tb->tb_sb)) {
+			*pp_s_father = *pp_s_com_father = NULL;
+			return CARRY_ON;
+		}
+		return REPEAT_SEARCH;
+	}
+
+	RFALSE(B_LEVEL(*pp_s_com_father) <= DISK_LEAF_NODE_LEVEL,
+	       "PAP-8185: (%b %z) level too small",
+	       *pp_s_com_father, *pp_s_com_father);
+
+	/* Check whether the common parent is locked. */
+
+	if (buffer_locked(*pp_s_com_father)) {
+		__wait_on_buffer(*pp_s_com_father);
+		if (FILESYSTEM_CHANGED_TB(p_s_tb)) {
+			decrement_bcount(*pp_s_com_father);
+			return REPEAT_SEARCH;
+		}
+	}
+
+	/* So, we got common parent of the current node and its left/right neighbor.
+	   Now we are geting the parent of the left/right neighbor. */
+
+	/* Form key to get parent of the left/right neighbor. */
+	le_key2cpu_key(&s_lr_father_key,
+		       B_N_PDELIM_KEY(*pp_s_com_father,
+				      (c_lr_par ==
+				       LEFT_PARENTS) ? (p_s_tb->lkey[n_h - 1] =
+							n_position -
+							1) : (p_s_tb->rkey[n_h -
+									   1] =
+							      n_position)));
+
+	if (c_lr_par == LEFT_PARENTS)
+		decrement_key(&s_lr_father_key);
+
+	if (search_by_key
+	    (p_s_tb->tb_sb, &s_lr_father_key, &s_path_to_neighbor_father,
+	     n_h + 1) == IO_ERROR)
+		// path is released
+		return IO_ERROR;
+
+	if (FILESYSTEM_CHANGED_TB(p_s_tb)) {
+		decrement_counters_in_path(&s_path_to_neighbor_father);
+		decrement_bcount(*pp_s_com_father);
+		return REPEAT_SEARCH;
+	}
+
+	*pp_s_father = PATH_PLAST_BUFFER(&s_path_to_neighbor_father);
+
+	RFALSE(B_LEVEL(*pp_s_father) != n_h + 1,
+	       "PAP-8190: (%b %z) level too small", *pp_s_father, *pp_s_father);
+	RFALSE(s_path_to_neighbor_father.path_length <
+	       FIRST_PATH_ELEMENT_OFFSET, "PAP-8192: path length is too small");
+
+	s_path_to_neighbor_father.path_length--;
+	decrement_counters_in_path(&s_path_to_neighbor_father);
+	return CARRY_ON;
+}
+
+/* Get parents of neighbors of node in the path(S[n_path_offset]) and common parents of
+ * S[n_path_offset] and L[n_path_offset]/R[n_path_offset]: F[n_path_offset], FL[n_path_offset],
+ * FR[n_path_offset], CFL[n_path_offset], CFR[n_path_offset].
+ * Calculate numbers of left and right delimiting keys position: lkey[n_path_offset], rkey[n_path_offset].
+ * Returns:	SCHEDULE_OCCURRED - schedule occurred while the function worked;
+ *	        CARRY_ON - schedule didn't occur while the function worked;
+ */
+static int get_parents(struct tree_balance *p_s_tb, int n_h)
+{
+	struct treepath *p_s_path = p_s_tb->tb_path;
+	int n_position,
+	    n_ret_value,
+	    n_path_offset = PATH_H_PATH_OFFSET(p_s_tb->tb_path, n_h);
+	struct buffer_head *p_s_curf, *p_s_curcf;
+
+	/* Current node is the root of the tree or will be root of the tree */
+	if (n_path_offset <= FIRST_PATH_ELEMENT_OFFSET) {
+		/* The root can not have parents.
+		   Release nodes which previously were obtained as parents of the current node neighbors. */
+		decrement_bcount(p_s_tb->FL[n_h]);
+		decrement_bcount(p_s_tb->CFL[n_h]);
+		decrement_bcount(p_s_tb->FR[n_h]);
+		decrement_bcount(p_s_tb->CFR[n_h]);
+		p_s_tb->FL[n_h] = p_s_tb->CFL[n_h] = p_s_tb->FR[n_h] =
+		    p_s_tb->CFR[n_h] = NULL;
+		return CARRY_ON;
+	}
+
+	/* Get parent FL[n_path_offset] of L[n_path_offset]. */
+	if ((n_position = PATH_OFFSET_POSITION(p_s_path, n_path_offset - 1))) {
+		/* Current node is not the first child of its parent. */
+		/*(p_s_curf = p_s_curcf = PATH_OFFSET_PBUFFER(p_s_path, n_path_offset - 1))->b_count += 2; */
+		p_s_curf = p_s_curcf =
+		    PATH_OFFSET_PBUFFER(p_s_path, n_path_offset - 1);
+		get_bh(p_s_curf);
+		get_bh(p_s_curf);
+		p_s_tb->lkey[n_h] = n_position - 1;
+	} else {
+		/* Calculate current parent of L[n_path_offset], which is the left neighbor of the current node.
+		   Calculate current common parent of L[n_path_offset] and the current node. Note that
+		   CFL[n_path_offset] not equal FL[n_path_offset] and CFL[n_path_offset] not equal F[n_path_offset].
+		   Calculate lkey[n_path_offset]. */
+		if ((n_ret_value = get_far_parent(p_s_tb, n_h + 1, &p_s_curf,
+						  &p_s_curcf,
+						  LEFT_PARENTS)) != CARRY_ON)
+			return n_ret_value;
+	}
+
+	decrement_bcount(p_s_tb->FL[n_h]);
+	p_s_tb->FL[n_h] = p_s_curf;	/* New initialization of FL[n_h]. */
+	decrement_bcount(p_s_tb->CFL[n_h]);
+	p_s_tb->CFL[n_h] = p_s_curcf;	/* New initialization of CFL[n_h]. */
+
+	RFALSE((p_s_curf && !B_IS_IN_TREE(p_s_curf)) ||
+	       (p_s_curcf && !B_IS_IN_TREE(p_s_curcf)),
+	       "PAP-8195: FL (%b) or CFL (%b) is invalid", p_s_curf, p_s_curcf);
+
+/* Get parent FR[n_h] of R[n_h]. */
+
+/* Current node is the last child of F[n_h]. FR[n_h] != F[n_h]. */
+	if (n_position == B_NR_ITEMS(PATH_H_PBUFFER(p_s_path, n_h + 1))) {
+/* Calculate current parent of R[n_h], which is the right neighbor of F[n_h].
+   Calculate current common parent of R[n_h] and current node. Note that CFR[n_h]
+   not equal FR[n_path_offset] and CFR[n_h] not equal F[n_h]. */
+		if ((n_ret_value =
+		     get_far_parent(p_s_tb, n_h + 1, &p_s_curf, &p_s_curcf,
+				    RIGHT_PARENTS)) != CARRY_ON)
+			return n_ret_value;
+	} else {
+/* Current node is not the last child of its parent F[n_h]. */
+		/*(p_s_curf = p_s_curcf = PATH_OFFSET_PBUFFER(p_s_path, n_path_offset - 1))->b_count += 2; */
+		p_s_curf = p_s_curcf =
+		    PATH_OFFSET_PBUFFER(p_s_path, n_path_offset - 1);
+		get_bh(p_s_curf);
+		get_bh(p_s_curf);
+		p_s_tb->rkey[n_h] = n_position;
+	}
+
+	decrement_bcount(p_s_tb->FR[n_h]);
+	p_s_tb->FR[n_h] = p_s_curf;	/* New initialization of FR[n_path_offset]. */
+
+	decrement_bcount(p_s_tb->CFR[n_h]);
+	p_s_tb->CFR[n_h] = p_s_curcf;	/* New initialization of CFR[n_path_offset]. */
+
+	RFALSE((p_s_curf && !B_IS_IN_TREE(p_s_curf)) ||
+	       (p_s_curcf && !B_IS_IN_TREE(p_s_curcf)),
+	       "PAP-8205: FR (%b) or CFR (%b) is invalid", p_s_curf, p_s_curcf);
+
+	return CARRY_ON;
+}
+
+/* it is possible to remove node as result of shiftings to
+   neighbors even when we insert or paste item. */
+static inline int can_node_be_removed(int mode, int lfree, int sfree, int rfree,
+				      struct tree_balance *tb, int h)
+{
+	struct buffer_head *Sh = PATH_H_PBUFFER(tb->tb_path, h);
+	int levbytes = tb->insert_size[h];
+	struct item_head *ih;
+	struct reiserfs_key *r_key = NULL;
+
+	ih = B_N_PITEM_HEAD(Sh, 0);
+	if (tb->CFR[h])
+		r_key = B_N_PDELIM_KEY(tb->CFR[h], tb->rkey[h]);
+
+	if (lfree + rfree + sfree < MAX_CHILD_SIZE(Sh) + levbytes
+	    /* shifting may merge items which might save space */
+	    -
+	    ((!h
+	      && op_is_left_mergeable(&(ih->ih_key), Sh->b_size)) ? IH_SIZE : 0)
+	    -
+	    ((!h && r_key
+	      && op_is_left_mergeable(r_key, Sh->b_size)) ? IH_SIZE : 0)
+	    + ((h) ? KEY_SIZE : 0)) {
+		/* node can not be removed */
+		if (sfree >= levbytes) {	/* new item fits into node S[h] without any shifting */
+			if (!h)
+				tb->s0num =
+				    B_NR_ITEMS(Sh) +
+				    ((mode == M_INSERT) ? 1 : 0);
+			set_parameters(tb, h, 0, 0, 1, NULL, -1, -1);
+			return NO_BALANCING_NEEDED;
+		}
+	}
+	PROC_INFO_INC(tb->tb_sb, can_node_be_removed[h]);
+	return !NO_BALANCING_NEEDED;
+}
+
+/* Check whether current node S[h] is balanced when increasing its size by
+ * Inserting or Pasting.
+ * Calculate parameters for balancing for current level h.
+ * Parameters:
+ *	tb	tree_balance structure;
+ *	h	current level of the node;
+ *	inum	item number in S[h];
+ *	mode	i - insert, p - paste;
+ * Returns:	1 - schedule occurred; 
+ *	        0 - balancing for higher levels needed;
+ *	       -1 - no balancing for higher levels needed;
+ *	       -2 - no disk space.
+ */
+/* ip means Inserting or Pasting */
+static int ip_check_balance(struct tree_balance *tb, int h)
+{
+	struct virtual_node *vn = tb->tb_vn;
+	int levbytes,		/* Number of bytes that must be inserted into (value
+				   is negative if bytes are deleted) buffer which
+				   contains node being balanced.  The mnemonic is
+				   that the attempted change in node space used level
+				   is levbytes bytes. */
+	 n_ret_value;
+
+	int lfree, sfree, rfree /* free space in L, S and R */ ;
+
+	/* nver is short for number of vertixes, and lnver is the number if
+	   we shift to the left, rnver is the number if we shift to the
+	   right, and lrnver is the number if we shift in both directions.
+	   The goal is to minimize first the number of vertixes, and second,
+	   the number of vertixes whose contents are changed by shifting,
+	   and third the number of uncached vertixes whose contents are
+	   changed by shifting and must be read from disk.  */
+	int nver, lnver, rnver, lrnver;
+
+	/* used at leaf level only, S0 = S[0] is the node being balanced,
+	   sInum [ I = 0,1,2 ] is the number of items that will
+	   remain in node SI after balancing.  S1 and S2 are new
+	   nodes that might be created. */
+
+	/* we perform 8 calls to get_num_ver().  For each call we calculate five parameters.
+	   where 4th parameter is s1bytes and 5th - s2bytes
+	 */
+	short snum012[40] = { 0, };	/* s0num, s1num, s2num for 8 cases 
+					   0,1 - do not shift and do not shift but bottle
+					   2 - shift only whole item to left
+					   3 - shift to left and bottle as much as possible
+					   4,5 - shift to right (whole items and as much as possible
+					   6,7 - shift to both directions (whole items and as much as possible)
+					 */
+
+	/* Sh is the node whose balance is currently being checked */
+	struct buffer_head *Sh;
+
+	Sh = PATH_H_PBUFFER(tb->tb_path, h);
+	levbytes = tb->insert_size[h];
+
+	/* Calculate balance parameters for creating new root. */
+	if (!Sh) {
+		if (!h)
+			reiserfs_panic(tb->tb_sb,
+				       "vs-8210: ip_check_balance: S[0] can not be 0");
+		switch (n_ret_value = get_empty_nodes(tb, h)) {
+		case CARRY_ON:
+			set_parameters(tb, h, 0, 0, 1, NULL, -1, -1);
+			return NO_BALANCING_NEEDED;	/* no balancing for higher levels needed */
+
+		case NO_DISK_SPACE:
+		case REPEAT_SEARCH:
+			return n_ret_value;
+		default:
+			reiserfs_panic(tb->tb_sb,
+				       "vs-8215: ip_check_balance: incorrect return value of get_empty_nodes");
+		}
+	}
+
+	if ((n_ret_value = get_parents(tb, h)) != CARRY_ON)	/* get parents of S[h] neighbors. */
+		return n_ret_value;
+
+	sfree = B_FREE_SPACE(Sh);
+
+	/* get free space of neighbors */
+	rfree = get_rfree(tb, h);
+	lfree = get_lfree(tb, h);
+
+	if (can_node_be_removed(vn->vn_mode, lfree, sfree, rfree, tb, h) ==
+	    NO_BALANCING_NEEDED)
+		/* and new item fits into node S[h] without any shifting */
+		return NO_BALANCING_NEEDED;
+
+	create_virtual_node(tb, h);
+
+	/*  
+	   determine maximal number of items we can shift to the left neighbor (in tb structure)
+	   and the maximal number of bytes that can flow to the left neighbor
+	   from the left most liquid item that cannot be shifted from S[0] entirely (returned value)
+	 */
+	check_left(tb, h, lfree);
+
+	/*
+	   determine maximal number of items we can shift to the right neighbor (in tb structure)
+	   and the maximal number of bytes that can flow to the right neighbor
+	   from the right most liquid item that cannot be shifted from S[0] entirely (returned value)
+	 */
+	check_right(tb, h, rfree);
+
+	/* all contents of internal node S[h] can be moved into its
+	   neighbors, S[h] will be removed after balancing */
+	if (h && (tb->rnum[h] + tb->lnum[h] >= vn->vn_nr_item + 1)) {
+		int to_r;
+
+		/* Since we are working on internal nodes, and our internal
+		   nodes have fixed size entries, then we can balance by the
+		   number of items rather than the space they consume.  In this
+		   routine we set the left node equal to the right node,
+		   allowing a difference of less than or equal to 1 child
+		   pointer. */
+		to_r =
+		    ((MAX_NR_KEY(Sh) << 1) + 2 - tb->lnum[h] - tb->rnum[h] +
+		     vn->vn_nr_item + 1) / 2 - (MAX_NR_KEY(Sh) + 1 -
+						tb->rnum[h]);
+		set_parameters(tb, h, vn->vn_nr_item + 1 - to_r, to_r, 0, NULL,
+			       -1, -1);
+		return CARRY_ON;
+	}
+
+	/* this checks balance condition, that any two neighboring nodes can not fit in one node */
+	RFALSE(h &&
+	       (tb->lnum[h] >= vn->vn_nr_item + 1 ||
+		tb->rnum[h] >= vn->vn_nr_item + 1),
+	       "vs-8220: tree is not balanced on internal level");
+	RFALSE(!h && ((tb->lnum[h] >= vn->vn_nr_item && (tb->lbytes == -1)) ||
+		      (tb->rnum[h] >= vn->vn_nr_item && (tb->rbytes == -1))),
+	       "vs-8225: tree is not balanced on leaf level");
+
+	/* all contents of S[0] can be moved into its neighbors
+	   S[0] will be removed after balancing. */
+	if (!h && is_leaf_removable(tb))
+		return CARRY_ON;
+
+	/* why do we perform this check here rather than earlier??
+	   Answer: we can win 1 node in some cases above. Moreover we
+	   checked it above, when we checked, that S[0] is not removable
+	   in principle */
+	if (sfree >= levbytes) {	/* new item fits into node S[h] without any shifting */
+		if (!h)
+			tb->s0num = vn->vn_nr_item;
+		set_parameters(tb, h, 0, 0, 1, NULL, -1, -1);
+		return NO_BALANCING_NEEDED;
+	}
+
+	{
+		int lpar, rpar, nset, lset, rset, lrset;
+		/* 
+		 * regular overflowing of the node
+		 */
+
+		/* get_num_ver works in 2 modes (FLOW & NO_FLOW) 
+		   lpar, rpar - number of items we can shift to left/right neighbor (including splitting item)
+		   nset, lset, rset, lrset - shows, whether flowing items give better packing 
+		 */
+#define FLOW 1
+#define NO_FLOW 0		/* do not any splitting */
+
+		/* we choose one the following */
+#define NOTHING_SHIFT_NO_FLOW	0
+#define NOTHING_SHIFT_FLOW	5
+#define LEFT_SHIFT_NO_FLOW	10
+#define LEFT_SHIFT_FLOW		15
+#define RIGHT_SHIFT_NO_FLOW	20
+#define RIGHT_SHIFT_FLOW	25
+#define LR_SHIFT_NO_FLOW	30
+#define LR_SHIFT_FLOW		35
+
+		lpar = tb->lnum[h];
+		rpar = tb->rnum[h];
+
+		/* calculate number of blocks S[h] must be split into when
+		   nothing is shifted to the neighbors,
+		   as well as number of items in each part of the split node (s012 numbers),
+		   and number of bytes (s1bytes) of the shared drop which flow to S1 if any */
+		nset = NOTHING_SHIFT_NO_FLOW;
+		nver = get_num_ver(vn->vn_mode, tb, h,
+				   0, -1, h ? vn->vn_nr_item : 0, -1,
+				   snum012, NO_FLOW);
+
+		if (!h) {
+			int nver1;
+
+			/* note, that in this case we try to bottle between S[0] and S1 (S1 - the first new node) */
+			nver1 = get_num_ver(vn->vn_mode, tb, h,
+					    0, -1, 0, -1,
+					    snum012 + NOTHING_SHIFT_FLOW, FLOW);
+			if (nver > nver1)
+				nset = NOTHING_SHIFT_FLOW, nver = nver1;
+		}
+
+		/* calculate number of blocks S[h] must be split into when
+		   l_shift_num first items and l_shift_bytes of the right most
+		   liquid item to be shifted are shifted to the left neighbor,
+		   as well as number of items in each part of the splitted node (s012 numbers),
+		   and number of bytes (s1bytes) of the shared drop which flow to S1 if any
+		 */
+		lset = LEFT_SHIFT_NO_FLOW;
+		lnver = get_num_ver(vn->vn_mode, tb, h,
+				    lpar - ((h || tb->lbytes == -1) ? 0 : 1),
+				    -1, h ? vn->vn_nr_item : 0, -1,
+				    snum012 + LEFT_SHIFT_NO_FLOW, NO_FLOW);
+		if (!h) {
+			int lnver1;
+
+			lnver1 = get_num_ver(vn->vn_mode, tb, h,
+					     lpar -
+					     ((tb->lbytes != -1) ? 1 : 0),
+					     tb->lbytes, 0, -1,
+					     snum012 + LEFT_SHIFT_FLOW, FLOW);
+			if (lnver > lnver1)
+				lset = LEFT_SHIFT_FLOW, lnver = lnver1;
+		}
+
+		/* calculate number of blocks S[h] must be split into when
+		   r_shift_num first items and r_shift_bytes of the left most
+		   liquid item to be shifted are shifted to the right neighbor,
+		   as well as number of items in each part of the splitted node (s012 numbers),
+		   and number of bytes (s1bytes) of the shared drop which flow to S1 if any
+		 */
+		rset = RIGHT_SHIFT_NO_FLOW;
+		rnver = get_num_ver(vn->vn_mode, tb, h,
+				    0, -1,
+				    h ? (vn->vn_nr_item - rpar) : (rpar -
+								   ((tb->
+								     rbytes !=
+								     -1) ? 1 :
+								    0)), -1,
+				    snum012 + RIGHT_SHIFT_NO_FLOW, NO_FLOW);
+		if (!h) {
+			int rnver1;
+
+			rnver1 = get_num_ver(vn->vn_mode, tb, h,
+					     0, -1,
+					     (rpar -
+					      ((tb->rbytes != -1) ? 1 : 0)),
+					     tb->rbytes,
+					     snum012 + RIGHT_SHIFT_FLOW, FLOW);
+
+			if (rnver > rnver1)
+				rset = RIGHT_SHIFT_FLOW, rnver = rnver1;
+		}
+
+		/* calculate number of blocks S[h] must be split into when
+		   items are shifted in both directions,
+		   as well as number of items in each part of the splitted node (s012 numbers),
+		   and number of bytes (s1bytes) of the shared drop which flow to S1 if any
+		 */
+		lrset = LR_SHIFT_NO_FLOW;
+		lrnver = get_num_ver(vn->vn_mode, tb, h,
+				     lpar - ((h || tb->lbytes == -1) ? 0 : 1),
+				     -1,
+				     h ? (vn->vn_nr_item - rpar) : (rpar -
+								    ((tb->
+								      rbytes !=
+								      -1) ? 1 :
+								     0)), -1,
+				     snum012 + LR_SHIFT_NO_FLOW, NO_FLOW);
+		if (!h) {
+			int lrnver1;
+
+			lrnver1 = get_num_ver(vn->vn_mode, tb, h,
+					      lpar -
+					      ((tb->lbytes != -1) ? 1 : 0),
+					      tb->lbytes,
+					      (rpar -
+					       ((tb->rbytes != -1) ? 1 : 0)),
+					      tb->rbytes,
+					      snum012 + LR_SHIFT_FLOW, FLOW);
+			if (lrnver > lrnver1)
+				lrset = LR_SHIFT_FLOW, lrnver = lrnver1;
+		}
+
+		/* Our general shifting strategy is:
+		   1) to minimized number of new nodes;
+		   2) to minimized number of neighbors involved in shifting;
+		   3) to minimized number of disk reads; */
+
+		/* we can win TWO or ONE nodes by shifting in both directions */
+		if (lrnver < lnver && lrnver < rnver) {
+			RFALSE(h &&
+			       (tb->lnum[h] != 1 ||
+				tb->rnum[h] != 1 ||
+				lrnver != 1 || rnver != 2 || lnver != 2
+				|| h != 1), "vs-8230: bad h");
+			if (lrset == LR_SHIFT_FLOW)
+				set_parameters(tb, h, tb->lnum[h], tb->rnum[h],
+					       lrnver, snum012 + lrset,
+					       tb->lbytes, tb->rbytes);
+			else
+				set_parameters(tb, h,
+					       tb->lnum[h] -
+					       ((tb->lbytes == -1) ? 0 : 1),
+					       tb->rnum[h] -
+					       ((tb->rbytes == -1) ? 0 : 1),
+					       lrnver, snum012 + lrset, -1, -1);
+
+			return CARRY_ON;
+		}
+
+		/* if shifting doesn't lead to better packing then don't shift */
+		if (nver == lrnver) {
+			set_parameters(tb, h, 0, 0, nver, snum012 + nset, -1,
+				       -1);
+			return CARRY_ON;
+		}
+
+		/* now we know that for better packing shifting in only one
+		   direction either to the left or to the right is required */
+
+		/*  if shifting to the left is better than shifting to the right */
+		if (lnver < rnver) {
+			SET_PAR_SHIFT_LEFT;
+			return CARRY_ON;
+		}
+
+		/* if shifting to the right is better than shifting to the left */
+		if (lnver > rnver) {
+			SET_PAR_SHIFT_RIGHT;
+			return CARRY_ON;
+		}
+
+		/* now shifting in either direction gives the same number
+		   of nodes and we can make use of the cached neighbors */
+		if (is_left_neighbor_in_cache(tb, h)) {
+			SET_PAR_SHIFT_LEFT;
+			return CARRY_ON;
+		}
+
+		/* shift to the right independently on whether the right neighbor in cache or not */
+		SET_PAR_SHIFT_RIGHT;
+		return CARRY_ON;
+	}
+}
+
+/* Check whether current node S[h] is balanced when Decreasing its size by
+ * Deleting or Cutting for INTERNAL node of S+tree.
+ * Calculate parameters for balancing for current level h.
+ * Parameters:
+ *	tb	tree_balance structure;
+ *	h	current level of the node;
+ *	inum	item number in S[h];
+ *	mode	i - insert, p - paste;
+ * Returns:	1 - schedule occurred; 
+ *	        0 - balancing for higher levels needed;
+ *	       -1 - no balancing for higher levels needed;
+ *	       -2 - no disk space.
+ *
+ * Note: Items of internal nodes have fixed size, so the balance condition for
+ * the internal part of S+tree is as for the B-trees.
+ */
+static int dc_check_balance_internal(struct tree_balance *tb, int h)
+{
+	struct virtual_node *vn = tb->tb_vn;
+
+	/* Sh is the node whose balance is currently being checked,
+	   and Fh is its father.  */
+	struct buffer_head *Sh, *Fh;
+	int maxsize, n_ret_value;
+	int lfree, rfree /* free space in L and R */ ;
+
+	Sh = PATH_H_PBUFFER(tb->tb_path, h);
+	Fh = PATH_H_PPARENT(tb->tb_path, h);
+
+	maxsize = MAX_CHILD_SIZE(Sh);
+
+/*   using tb->insert_size[h], which is negative in this case, create_virtual_node calculates: */
+/*   new_nr_item = number of items node would have if operation is */
+/* 	performed without balancing (new_nr_item); */
+	create_virtual_node(tb, h);
+
+	if (!Fh) {		/* S[h] is the root. */
+		if (vn->vn_nr_item > 0) {
+			set_parameters(tb, h, 0, 0, 1, NULL, -1, -1);
+			return NO_BALANCING_NEEDED;	/* no balancing for higher levels needed */
+		}
+		/* new_nr_item == 0.
+		 * Current root will be deleted resulting in
+		 * decrementing the tree height. */
+		set_parameters(tb, h, 0, 0, 0, NULL, -1, -1);
+		return CARRY_ON;
+	}
+
+	if ((n_ret_value = get_parents(tb, h)) != CARRY_ON)
+		return n_ret_value;
+
+	/* get free space of neighbors */
+	rfree = get_rfree(tb, h);
+	lfree = get_lfree(tb, h);
+
+	/* determine maximal number of items we can fit into neighbors */
+	check_left(tb, h, lfree);
+	check_right(tb, h, rfree);
+
+	if (vn->vn_nr_item >= MIN_NR_KEY(Sh)) {	/* Balance condition for the internal node is valid.
+						 * In this case we balance only if it leads to better packing. */
+		if (vn->vn_nr_item == MIN_NR_KEY(Sh)) {	/* Here we join S[h] with one of its neighbors,
+							 * which is impossible with greater values of new_nr_item. */
+			if (tb->lnum[h] >= vn->vn_nr_item + 1) {
+				/* All contents of S[h] can be moved to L[h]. */
+				int n;
+				int order_L;
+
+				order_L =
+				    ((n =
+				      PATH_H_B_ITEM_ORDER(tb->tb_path,
+							  h)) ==
+				     0) ? B_NR_ITEMS(tb->FL[h]) : n - 1;
+				n = dc_size(B_N_CHILD(tb->FL[h], order_L)) /
+				    (DC_SIZE + KEY_SIZE);
+				set_parameters(tb, h, -n - 1, 0, 0, NULL, -1,
+					       -1);
+				return CARRY_ON;
+			}
+
+			if (tb->rnum[h] >= vn->vn_nr_item + 1) {
+				/* All contents of S[h] can be moved to R[h]. */
+				int n;
+				int order_R;
+
+				order_R =
+				    ((n =
+				      PATH_H_B_ITEM_ORDER(tb->tb_path,
+							  h)) ==
+				     B_NR_ITEMS(Fh)) ? 0 : n + 1;
+				n = dc_size(B_N_CHILD(tb->FR[h], order_R)) /
+				    (DC_SIZE + KEY_SIZE);
+				set_parameters(tb, h, 0, -n - 1, 0, NULL, -1,
+					       -1);
+				return CARRY_ON;
+			}
+		}
+
+		if (tb->rnum[h] + tb->lnum[h] >= vn->vn_nr_item + 1) {
+			/* All contents of S[h] can be moved to the neighbors (L[h] & R[h]). */
+			int to_r;
+
+			to_r =
+			    ((MAX_NR_KEY(Sh) << 1) + 2 - tb->lnum[h] -
+			     tb->rnum[h] + vn->vn_nr_item + 1) / 2 -
+			    (MAX_NR_KEY(Sh) + 1 - tb->rnum[h]);
+			set_parameters(tb, h, vn->vn_nr_item + 1 - to_r, to_r,
+				       0, NULL, -1, -1);
+			return CARRY_ON;
+		}
+
+		/* Balancing does not lead to better packing. */
+		set_parameters(tb, h, 0, 0, 1, NULL, -1, -1);
+		return NO_BALANCING_NEEDED;
+	}
+
+	/* Current node contain insufficient number of items. Balancing is required. */
+	/* Check whether we can merge S[h] with left neighbor. */
+	if (tb->lnum[h] >= vn->vn_nr_item + 1)
+		if (is_left_neighbor_in_cache(tb, h)
+		    || tb->rnum[h] < vn->vn_nr_item + 1 || !tb->FR[h]) {
+			int n;
+			int order_L;
+
+			order_L =
+			    ((n =
+			      PATH_H_B_ITEM_ORDER(tb->tb_path,
+						  h)) ==
+			     0) ? B_NR_ITEMS(tb->FL[h]) : n - 1;
+			n = dc_size(B_N_CHILD(tb->FL[h], order_L)) / (DC_SIZE +
+								      KEY_SIZE);
+			set_parameters(tb, h, -n - 1, 0, 0, NULL, -1, -1);
+			return CARRY_ON;
+		}
+
+	/* Check whether we can merge S[h] with right neighbor. */
+	if (tb->rnum[h] >= vn->vn_nr_item + 1) {
+		int n;
+		int order_R;
+
+		order_R =
+		    ((n =
+		      PATH_H_B_ITEM_ORDER(tb->tb_path,
+					  h)) == B_NR_ITEMS(Fh)) ? 0 : (n + 1);
+		n = dc_size(B_N_CHILD(tb->FR[h], order_R)) / (DC_SIZE +
+							      KEY_SIZE);
+		set_parameters(tb, h, 0, -n - 1, 0, NULL, -1, -1);
+		return CARRY_ON;
+	}
+
+	/* All contents of S[h] can be moved to the neighbors (L[h] & R[h]). */
+	if (tb->rnum[h] + tb->lnum[h] >= vn->vn_nr_item + 1) {
+		int to_r;
+
+		to_r =
+		    ((MAX_NR_KEY(Sh) << 1) + 2 - tb->lnum[h] - tb->rnum[h] +
+		     vn->vn_nr_item + 1) / 2 - (MAX_NR_KEY(Sh) + 1 -
+						tb->rnum[h]);
+		set_parameters(tb, h, vn->vn_nr_item + 1 - to_r, to_r, 0, NULL,
+			       -1, -1);
+		return CARRY_ON;
+	}
+
+	/* For internal nodes try to borrow item from a neighbor */
+	RFALSE(!tb->FL[h] && !tb->FR[h], "vs-8235: trying to borrow for root");
+
+	/* Borrow one or two items from caching neighbor */
+	if (is_left_neighbor_in_cache(tb, h) || !tb->FR[h]) {
+		int from_l;
+
+		from_l =
+		    (MAX_NR_KEY(Sh) + 1 - tb->lnum[h] + vn->vn_nr_item +
+		     1) / 2 - (vn->vn_nr_item + 1);
+		set_parameters(tb, h, -from_l, 0, 1, NULL, -1, -1);
+		return CARRY_ON;
+	}
+
+	set_parameters(tb, h, 0,
+		       -((MAX_NR_KEY(Sh) + 1 - tb->rnum[h] + vn->vn_nr_item +
+			  1) / 2 - (vn->vn_nr_item + 1)), 1, NULL, -1, -1);
+	return CARRY_ON;
+}
+
+/* Check whether current node S[h] is balanced when Decreasing its size by
+ * Deleting or Truncating for LEAF node of S+tree.
+ * Calculate parameters for balancing for current level h.
+ * Parameters:
+ *	tb	tree_balance structure;
+ *	h	current level of the node;
+ *	inum	item number in S[h];
+ *	mode	i - insert, p - paste;
+ * Returns:	1 - schedule occurred; 
+ *	        0 - balancing for higher levels needed;
+ *	       -1 - no balancing for higher levels needed;
+ *	       -2 - no disk space.
+ */
+static int dc_check_balance_leaf(struct tree_balance *tb, int h)
+{
+	struct virtual_node *vn = tb->tb_vn;
+
+	/* Number of bytes that must be deleted from
+	   (value is negative if bytes are deleted) buffer which
+	   contains node being balanced.  The mnemonic is that the
+	   attempted change in node space used level is levbytes bytes. */
+	int levbytes;
+	/* the maximal item size */
+	int maxsize, n_ret_value;
+	/* S0 is the node whose balance is currently being checked,
+	   and F0 is its father.  */
+	struct buffer_head *S0, *F0;
+	int lfree, rfree /* free space in L and R */ ;
+
+	S0 = PATH_H_PBUFFER(tb->tb_path, 0);
+	F0 = PATH_H_PPARENT(tb->tb_path, 0);
+
+	levbytes = tb->insert_size[h];
+
+	maxsize = MAX_CHILD_SIZE(S0);	/* maximal possible size of an item */
+
+	if (!F0) {		/* S[0] is the root now. */
+
+		RFALSE(-levbytes >= maxsize - B_FREE_SPACE(S0),
+		       "vs-8240: attempt to create empty buffer tree");
+
+		set_parameters(tb, h, 0, 0, 1, NULL, -1, -1);
+		return NO_BALANCING_NEEDED;
+	}
+
+	if ((n_ret_value = get_parents(tb, h)) != CARRY_ON)
+		return n_ret_value;
+
+	/* get free space of neighbors */
+	rfree = get_rfree(tb, h);
+	lfree = get_lfree(tb, h);
+
+	create_virtual_node(tb, h);
+
+	/* if 3 leaves can be merge to one, set parameters and return */
+	if (are_leaves_removable(tb, lfree, rfree))
+		return CARRY_ON;
+
+	/* determine maximal number of items we can shift to the left/right  neighbor
+	   and the maximal number of bytes that can flow to the left/right neighbor
+	   from the left/right most liquid item that cannot be shifted from S[0] entirely
+	 */
+	check_left(tb, h, lfree);
+	check_right(tb, h, rfree);
+
+	/* check whether we can merge S with left neighbor. */
+	if (tb->lnum[0] >= vn->vn_nr_item && tb->lbytes == -1)
+		if (is_left_neighbor_in_cache(tb, h) || ((tb->rnum[0] - ((tb->rbytes == -1) ? 0 : 1)) < vn->vn_nr_item) ||	/* S can not be merged with R */
+		    !tb->FR[h]) {
+
+			RFALSE(!tb->FL[h],
+			       "vs-8245: dc_check_balance_leaf: FL[h] must exist");
+
+			/* set parameter to merge S[0] with its left neighbor */
+			set_parameters(tb, h, -1, 0, 0, NULL, -1, -1);
+			return CARRY_ON;
+		}
+
+	/* check whether we can merge S[0] with right neighbor. */
+	if (tb->rnum[0] >= vn->vn_nr_item && tb->rbytes == -1) {
+		set_parameters(tb, h, 0, -1, 0, NULL, -1, -1);
+		return CARRY_ON;
+	}
+
+	/* All contents of S[0] can be moved to the neighbors (L[0] & R[0]). Set parameters and return */
+	if (is_leaf_removable(tb))
+		return CARRY_ON;
+
+	/* Balancing is not required. */
+	tb->s0num = vn->vn_nr_item;
+	set_parameters(tb, h, 0, 0, 1, NULL, -1, -1);
+	return NO_BALANCING_NEEDED;
+}
+
+/* Check whether current node S[h] is balanced when Decreasing its size by
+ * Deleting or Cutting.
+ * Calculate parameters for balancing for current level h.
+ * Parameters:
+ *	tb	tree_balance structure;
+ *	h	current level of the node;
+ *	inum	item number in S[h];
+ *	mode	d - delete, c - cut.
+ * Returns:	1 - schedule occurred; 
+ *	        0 - balancing for higher levels needed;
+ *	       -1 - no balancing for higher levels needed;
+ *	       -2 - no disk space.
+ */
+static int dc_check_balance(struct tree_balance *tb, int h)
+{
+	RFALSE(!(PATH_H_PBUFFER(tb->tb_path, h)),
+	       "vs-8250: S is not initialized");
+
+	if (h)
+		return dc_check_balance_internal(tb, h);
+	else
+		return dc_check_balance_leaf(tb, h);
+}
+
+/* Check whether current node S[h] is balanced.
+ * Calculate parameters for balancing for current level h.
+ * Parameters:
+ *
+ *	tb	tree_balance structure:
+ *
+ *              tb is a large structure that must be read about in the header file
+ *              at the same time as this procedure if the reader is to successfully
+ *              understand this procedure
+ *
+ *	h	current level of the node;
+ *	inum	item number in S[h];
+ *	mode	i - insert, p - paste, d - delete, c - cut.
+ * Returns:	1 - schedule occurred; 
+ *	        0 - balancing for higher levels needed;
+ *	       -1 - no balancing for higher levels needed;
+ *	       -2 - no disk space.
+ */
+static int check_balance(int mode,
+			 struct tree_balance *tb,
+			 int h,
+			 int inum,
+			 int pos_in_item,
+			 struct item_head *ins_ih, const void *data)
+{
+	struct virtual_node *vn;
+
+	vn = tb->tb_vn = (struct virtual_node *)(tb->vn_buf);
+	vn->vn_free_ptr = (char *)(tb->tb_vn + 1);
+	vn->vn_mode = mode;
+	vn->vn_affected_item_num = inum;
+	vn->vn_pos_in_item = pos_in_item;
+	vn->vn_ins_ih = ins_ih;
+	vn->vn_data = data;
+
+	RFALSE(mode == M_INSERT && !vn->vn_ins_ih,
+	       "vs-8255: ins_ih can not be 0 in insert mode");
+
+	if (tb->insert_size[h] > 0)
+		/* Calculate balance parameters when size of node is increasing. */
+		return ip_check_balance(tb, h);
+
+	/* Calculate balance parameters when  size of node is decreasing. */
+	return dc_check_balance(tb, h);
+}
+
+/* Check whether parent at the path is the really parent of the current node.*/
+static int get_direct_parent(struct tree_balance *p_s_tb, int n_h)
+{
+	struct buffer_head *p_s_bh;
+	struct treepath *p_s_path = p_s_tb->tb_path;
+	int n_position,
+	    n_path_offset = PATH_H_PATH_OFFSET(p_s_tb->tb_path, n_h);
+
+	/* We are in the root or in the new root. */
+	if (n_path_offset <= FIRST_PATH_ELEMENT_OFFSET) {
+
+		RFALSE(n_path_offset < FIRST_PATH_ELEMENT_OFFSET - 1,
+		       "PAP-8260: invalid offset in the path");
+
+		if (PATH_OFFSET_PBUFFER(p_s_path, FIRST_PATH_ELEMENT_OFFSET)->
+		    b_blocknr == SB_ROOT_BLOCK(p_s_tb->tb_sb)) {
+			/* Root is not changed. */
+			PATH_OFFSET_PBUFFER(p_s_path, n_path_offset - 1) = NULL;
+			PATH_OFFSET_POSITION(p_s_path, n_path_offset - 1) = 0;
+			return CARRY_ON;
+		}
+		return REPEAT_SEARCH;	/* Root is changed and we must recalculate the path. */
+	}
+
+	if (!B_IS_IN_TREE
+	    (p_s_bh = PATH_OFFSET_PBUFFER(p_s_path, n_path_offset - 1)))
+		return REPEAT_SEARCH;	/* Parent in the path is not in the tree. */
+
+	if ((n_position =
+	     PATH_OFFSET_POSITION(p_s_path,
+				  n_path_offset - 1)) > B_NR_ITEMS(p_s_bh))
+		return REPEAT_SEARCH;
+
+	if (B_N_CHILD_NUM(p_s_bh, n_position) !=
+	    PATH_OFFSET_PBUFFER(p_s_path, n_path_offset)->b_blocknr)
+		/* Parent in the path is not parent of the current node in the tree. */
+		return REPEAT_SEARCH;
+
+	if (buffer_locked(p_s_bh)) {
+		__wait_on_buffer(p_s_bh);
+		if (FILESYSTEM_CHANGED_TB(p_s_tb))
+			return REPEAT_SEARCH;
+	}
+
+	return CARRY_ON;	/* Parent in the path is unlocked and really parent of the current node.  */
+}
+
+/* Using lnum[n_h] and rnum[n_h] we should determine what neighbors
+ * of S[n_h] we
+ * need in order to balance S[n_h], and get them if necessary.
+ * Returns:	SCHEDULE_OCCURRED - schedule occurred while the function worked;
+ *	        CARRY_ON - schedule didn't occur while the function worked;
+ */
+static int get_neighbors(struct tree_balance *p_s_tb, int n_h)
+{
+	int n_child_position,
+	    n_path_offset = PATH_H_PATH_OFFSET(p_s_tb->tb_path, n_h + 1);
+	unsigned long n_son_number;
+	struct super_block *p_s_sb = p_s_tb->tb_sb;
+	struct buffer_head *p_s_bh;
+
+	PROC_INFO_INC(p_s_sb, get_neighbors[n_h]);
+
+	if (p_s_tb->lnum[n_h]) {
+		/* We need left neighbor to balance S[n_h]. */
+		PROC_INFO_INC(p_s_sb, need_l_neighbor[n_h]);
+		p_s_bh = PATH_OFFSET_PBUFFER(p_s_tb->tb_path, n_path_offset);
+
+		RFALSE(p_s_bh == p_s_tb->FL[n_h] &&
+		       !PATH_OFFSET_POSITION(p_s_tb->tb_path, n_path_offset),
+		       "PAP-8270: invalid position in the parent");
+
+		n_child_position =
+		    (p_s_bh ==
+		     p_s_tb->FL[n_h]) ? p_s_tb->lkey[n_h] : B_NR_ITEMS(p_s_tb->
+								       FL[n_h]);
+		n_son_number = B_N_CHILD_NUM(p_s_tb->FL[n_h], n_child_position);
+		p_s_bh = sb_bread(p_s_sb, n_son_number);
+		if (!p_s_bh)
+			return IO_ERROR;
+		if (FILESYSTEM_CHANGED_TB(p_s_tb)) {
+			decrement_bcount(p_s_bh);
+			PROC_INFO_INC(p_s_sb, get_neighbors_restart[n_h]);
+			return REPEAT_SEARCH;
+		}
+
+		RFALSE(!B_IS_IN_TREE(p_s_tb->FL[n_h]) ||
+		       n_child_position > B_NR_ITEMS(p_s_tb->FL[n_h]) ||
+		       B_N_CHILD_NUM(p_s_tb->FL[n_h], n_child_position) !=
+		       p_s_bh->b_blocknr, "PAP-8275: invalid parent");
+		RFALSE(!B_IS_IN_TREE(p_s_bh), "PAP-8280: invalid child");
+		RFALSE(!n_h &&
+		       B_FREE_SPACE(p_s_bh) !=
+		       MAX_CHILD_SIZE(p_s_bh) -
+		       dc_size(B_N_CHILD(p_s_tb->FL[0], n_child_position)),
+		       "PAP-8290: invalid child size of left neighbor");
+
+		decrement_bcount(p_s_tb->L[n_h]);
+		p_s_tb->L[n_h] = p_s_bh;
+	}
+
+	if (p_s_tb->rnum[n_h]) {	/* We need right neighbor to balance S[n_path_offset]. */
+		PROC_INFO_INC(p_s_sb, need_r_neighbor[n_h]);
+		p_s_bh = PATH_OFFSET_PBUFFER(p_s_tb->tb_path, n_path_offset);
+
+		RFALSE(p_s_bh == p_s_tb->FR[n_h] &&
+		       PATH_OFFSET_POSITION(p_s_tb->tb_path,
+					    n_path_offset) >=
+		       B_NR_ITEMS(p_s_bh),
+		       "PAP-8295: invalid position in the parent");
+
+		n_child_position =
+		    (p_s_bh == p_s_tb->FR[n_h]) ? p_s_tb->rkey[n_h] + 1 : 0;
+		n_son_number = B_N_CHILD_NUM(p_s_tb->FR[n_h], n_child_position);
+		p_s_bh = sb_bread(p_s_sb, n_son_number);
+		if (!p_s_bh)
+			return IO_ERROR;
+		if (FILESYSTEM_CHANGED_TB(p_s_tb)) {
+			decrement_bcount(p_s_bh);
+			PROC_INFO_INC(p_s_sb, get_neighbors_restart[n_h]);
+			return REPEAT_SEARCH;
+		}
+		decrement_bcount(p_s_tb->R[n_h]);
+		p_s_tb->R[n_h] = p_s_bh;
+
+		RFALSE(!n_h
+		       && B_FREE_SPACE(p_s_bh) !=
+		       MAX_CHILD_SIZE(p_s_bh) -
+		       dc_size(B_N_CHILD(p_s_tb->FR[0], n_child_position)),
+		       "PAP-8300: invalid child size of right neighbor (%d != %d - %d)",
+		       B_FREE_SPACE(p_s_bh), MAX_CHILD_SIZE(p_s_bh),
+		       dc_size(B_N_CHILD(p_s_tb->FR[0], n_child_position)));
+
+	}
+	return CARRY_ON;
+}
+
+static int get_virtual_node_size(struct super_block *sb, struct buffer_head *bh)
+{
+	int max_num_of_items;
+	int max_num_of_entries;
+	unsigned long blocksize = sb->s_blocksize;
+
+#define MIN_NAME_LEN 1
+
+	max_num_of_items = (blocksize - BLKH_SIZE) / (IH_SIZE + MIN_ITEM_LEN);
+	max_num_of_entries = (blocksize - BLKH_SIZE - IH_SIZE) /
+	    (DEH_SIZE + MIN_NAME_LEN);
+
+	return sizeof(struct virtual_node) +
+	    max(max_num_of_items * sizeof(struct virtual_item),
+		sizeof(struct virtual_item) + sizeof(struct direntry_uarea) +
+		(max_num_of_entries - 1) * sizeof(__u16));
+}
+
+/* maybe we should fail balancing we are going to perform when kmalloc
+   fails several times. But now it will loop until kmalloc gets
+   required memory */
+static int get_mem_for_virtual_node(struct tree_balance *tb)
+{
+	int check_fs = 0;
+	int size;
+	char *buf;
+
+	size = get_virtual_node_size(tb->tb_sb, PATH_PLAST_BUFFER(tb->tb_path));
+
+	if (size > tb->vn_buf_size) {
+		/* we have to allocate more memory for virtual node */
+		if (tb->vn_buf) {
+			/* free memory allocated before */
+			kfree(tb->vn_buf);
+			/* this is not needed if kfree is atomic */
+			check_fs = 1;
+		}
+
+		/* virtual node requires now more memory */
+		tb->vn_buf_size = size;
+
+		/* get memory for virtual item */
+		buf = kmalloc(size, GFP_ATOMIC | __GFP_NOWARN);
+		if (!buf) {
+			/* getting memory with GFP_KERNEL priority may involve
+			   balancing now (due to indirect_to_direct conversion on
+			   dcache shrinking). So, release path and collected
+			   resources here */
+			free_buffers_in_tb(tb);
+			buf = kmalloc(size, GFP_NOFS);
+			if (!buf) {
+				tb->vn_buf_size = 0;
+			}
+			tb->vn_buf = buf;
+			schedule();
+			return REPEAT_SEARCH;
+		}
+
+		tb->vn_buf = buf;
+	}
+
+	if (check_fs && FILESYSTEM_CHANGED_TB(tb))
+		return REPEAT_SEARCH;
+
+	return CARRY_ON;
+}
+
+#ifdef CONFIG_REISERFS_CHECK
+static void tb_buffer_sanity_check(struct super_block *p_s_sb,
+				   struct buffer_head *p_s_bh,
+				   const char *descr, int level)
+{
+	if (p_s_bh) {
+		if (atomic_read(&(p_s_bh->b_count)) <= 0) {
+
+			reiserfs_panic(p_s_sb,
+				       "jmacd-1: tb_buffer_sanity_check(): negative or zero reference counter for buffer %s[%d] (%b)\n",
+				       descr, level, p_s_bh);
+		}
+
+		if (!buffer_uptodate(p_s_bh)) {
+			reiserfs_panic(p_s_sb,
+				       "jmacd-2: tb_buffer_sanity_check(): buffer is not up to date %s[%d] (%b)\n",
+				       descr, level, p_s_bh);
+		}
+
+		if (!B_IS_IN_TREE(p_s_bh)) {
+			reiserfs_panic(p_s_sb,
+				       "jmacd-3: tb_buffer_sanity_check(): buffer is not in tree %s[%d] (%b)\n",
+				       descr, level, p_s_bh);
+		}
+
+		if (p_s_bh->b_bdev != p_s_sb->s_bdev) {
+			reiserfs_panic(p_s_sb,
+				       "jmacd-4: tb_buffer_sanity_check(): buffer has wrong device %s[%d] (%b)\n",
+				       descr, level, p_s_bh);
+		}
+
+		if (p_s_bh->b_size != p_s_sb->s_blocksize) {
+			reiserfs_panic(p_s_sb,
+				       "jmacd-5: tb_buffer_sanity_check(): buffer has wrong blocksize %s[%d] (%b)\n",
+				       descr, level, p_s_bh);
+		}
+
+		if (p_s_bh->b_blocknr > SB_BLOCK_COUNT(p_s_sb)) {
+			reiserfs_panic(p_s_sb,
+				       "jmacd-6: tb_buffer_sanity_check(): buffer block number too high %s[%d] (%b)\n",
+				       descr, level, p_s_bh);
+		}
+	}
+}
+#else
+static void tb_buffer_sanity_check(struct super_block *p_s_sb,
+				   struct buffer_head *p_s_bh,
+				   const char *descr, int level)
+{;
+}
+#endif
+
+static int clear_all_dirty_bits(struct super_block *s, struct buffer_head *bh)
+{
+	return reiserfs_prepare_for_journal(s, bh, 0);
+}
+
+static int wait_tb_buffers_until_unlocked(struct tree_balance *p_s_tb)
+{
+	struct buffer_head *locked;
+#ifdef CONFIG_REISERFS_CHECK
+	int repeat_counter = 0;
+#endif
+	int i;
+
+	do {
+
+		locked = NULL;
+
+		for (i = p_s_tb->tb_path->path_length;
+		     !locked && i > ILLEGAL_PATH_ELEMENT_OFFSET; i--) {
+			if (PATH_OFFSET_PBUFFER(p_s_tb->tb_path, i)) {
+				/* if I understand correctly, we can only be sure the last buffer
+				 ** in the path is in the tree --clm
+				 */
+#ifdef CONFIG_REISERFS_CHECK
+				if (PATH_PLAST_BUFFER(p_s_tb->tb_path) ==
+				    PATH_OFFSET_PBUFFER(p_s_tb->tb_path, i)) {
+					tb_buffer_sanity_check(p_s_tb->tb_sb,
+							       PATH_OFFSET_PBUFFER
+							       (p_s_tb->tb_path,
+								i), "S",
+							       p_s_tb->tb_path->
+							       path_length - i);
+				}
+#endif
+				if (!clear_all_dirty_bits(p_s_tb->tb_sb,
+							  PATH_OFFSET_PBUFFER
+							  (p_s_tb->tb_path,
+							   i))) {
+					locked =
+					    PATH_OFFSET_PBUFFER(p_s_tb->tb_path,
+								i);
+				}
+			}
+		}
+
+		for (i = 0; !locked && i < MAX_HEIGHT && p_s_tb->insert_size[i];
+		     i++) {
+
+			if (p_s_tb->lnum[i]) {
+
+				if (p_s_tb->L[i]) {
+					tb_buffer_sanity_check(p_s_tb->tb_sb,
+							       p_s_tb->L[i],
+							       "L", i);
+					if (!clear_all_dirty_bits
+					    (p_s_tb->tb_sb, p_s_tb->L[i]))
+						locked = p_s_tb->L[i];
+				}
+
+				if (!locked && p_s_tb->FL[i]) {
+					tb_buffer_sanity_check(p_s_tb->tb_sb,
+							       p_s_tb->FL[i],
+							       "FL", i);
+					if (!clear_all_dirty_bits
+					    (p_s_tb->tb_sb, p_s_tb->FL[i]))
+						locked = p_s_tb->FL[i];
+				}
+
+				if (!locked && p_s_tb->CFL[i]) {
+					tb_buffer_sanity_check(p_s_tb->tb_sb,
+							       p_s_tb->CFL[i],
+							       "CFL", i);
+					if (!clear_all_dirty_bits
+					    (p_s_tb->tb_sb, p_s_tb->CFL[i]))
+						locked = p_s_tb->CFL[i];
+				}
+
+			}
+
+			if (!locked && (p_s_tb->rnum[i])) {
+
+				if (p_s_tb->R[i]) {
+					tb_buffer_sanity_check(p_s_tb->tb_sb,
+							       p_s_tb->R[i],
+							       "R", i);
+					if (!clear_all_dirty_bits
+					    (p_s_tb->tb_sb, p_s_tb->R[i]))
+						locked = p_s_tb->R[i];
+				}
+
+				if (!locked && p_s_tb->FR[i]) {
+					tb_buffer_sanity_check(p_s_tb->tb_sb,
+							       p_s_tb->FR[i],
+							       "FR", i);
+					if (!clear_all_dirty_bits
+					    (p_s_tb->tb_sb, p_s_tb->FR[i]))
+						locked = p_s_tb->FR[i];
+				}
+
+				if (!locked && p_s_tb->CFR[i]) {
+					tb_buffer_sanity_check(p_s_tb->tb_sb,
+							       p_s_tb->CFR[i],
+							       "CFR", i);
+					if (!clear_all_dirty_bits
+					    (p_s_tb->tb_sb, p_s_tb->CFR[i]))
+						locked = p_s_tb->CFR[i];
+				}
+			}
+		}
+		/* as far as I can tell, this is not required.  The FEB list seems
+		 ** to be full of newly allocated nodes, which will never be locked,
+		 ** dirty, or anything else.
+		 ** To be safe, I'm putting in the checks and waits in.  For the moment,
+		 ** they are needed to keep the code in journal.c from complaining
+		 ** about the buffer.  That code is inside CONFIG_REISERFS_CHECK as well.
+		 ** --clm
+		 */
+		for (i = 0; !locked && i < MAX_FEB_SIZE; i++) {
+			if (p_s_tb->FEB[i]) {
+				if (!clear_all_dirty_bits
+				    (p_s_tb->tb_sb, p_s_tb->FEB[i]))
+					locked = p_s_tb->FEB[i];
+			}
+		}
+
+		if (locked) {
+#ifdef CONFIG_REISERFS_CHECK
+			repeat_counter++;
+			if ((repeat_counter % 10000) == 0) {
+				reiserfs_warning(p_s_tb->tb_sb,
+						 "wait_tb_buffers_until_released(): too many "
+						 "iterations waiting for buffer to unlock "
+						 "(%b)", locked);
+
+				/* Don't loop forever.  Try to recover from possible error. */
+
+				return (FILESYSTEM_CHANGED_TB(p_s_tb)) ?
+				    REPEAT_SEARCH : CARRY_ON;
+			}
+#endif
+			__wait_on_buffer(locked);
+			if (FILESYSTEM_CHANGED_TB(p_s_tb)) {
+				return REPEAT_SEARCH;
+			}
+		}
+
+	} while (locked);
+
+	return CARRY_ON;
+}
+
+/* Prepare for balancing, that is
+ *	get all necessary parents, and neighbors;
+ *	analyze what and where should be moved;
+ *	get sufficient number of new nodes;
+ * Balancing will start only after all resources will be collected at a time.
+ * 
+ * When ported to SMP kernels, only at the last moment after all needed nodes
+ * are collected in cache, will the resources be locked using the usual
+ * textbook ordered lock acquisition algorithms.  Note that ensuring that
+ * this code neither write locks what it does not need to write lock nor locks out of order
+ * will be a pain in the butt that could have been avoided.  Grumble grumble. -Hans
+ * 
+ * fix is meant in the sense of render unchanging
+ * 
+ * Latency might be improved by first gathering a list of what buffers are needed
+ * and then getting as many of them in parallel as possible? -Hans
+ *
+ * Parameters:
+ *	op_mode	i - insert, d - delete, c - cut (truncate), p - paste (append)
+ *	tb	tree_balance structure;
+ *	inum	item number in S[h];
+ *      pos_in_item - comment this if you can
+ *      ins_ih & ins_sd are used when inserting
+ * Returns:	1 - schedule occurred while the function worked;
+ *	        0 - schedule didn't occur while the function worked;
+ *             -1 - if no_disk_space 
+ */
+
+int fix_nodes(int n_op_mode, struct tree_balance *p_s_tb, struct item_head *p_s_ins_ih,	// item head of item being inserted
+	      const void *data	// inserted item or data to be pasted
+    )
+{
+	int n_ret_value, n_h, n_item_num = PATH_LAST_POSITION(p_s_tb->tb_path);
+	int n_pos_in_item;
+
+	/* we set wait_tb_buffers_run when we have to restore any dirty bits cleared
+	 ** during wait_tb_buffers_run
+	 */
+	int wait_tb_buffers_run = 0;
+	struct buffer_head *p_s_tbS0 = PATH_PLAST_BUFFER(p_s_tb->tb_path);
+
+	++REISERFS_SB(p_s_tb->tb_sb)->s_fix_nodes;
+
+	n_pos_in_item = p_s_tb->tb_path->pos_in_item;
+
+	p_s_tb->fs_gen = get_generation(p_s_tb->tb_sb);
+
+	/* we prepare and log the super here so it will already be in the
+	 ** transaction when do_balance needs to change it.
+	 ** This way do_balance won't have to schedule when trying to prepare
+	 ** the super for logging
+	 */
+	reiserfs_prepare_for_journal(p_s_tb->tb_sb,
+				     SB_BUFFER_WITH_SB(p_s_tb->tb_sb), 1);
+	journal_mark_dirty(p_s_tb->transaction_handle, p_s_tb->tb_sb,
+			   SB_BUFFER_WITH_SB(p_s_tb->tb_sb));
+	if (FILESYSTEM_CHANGED_TB(p_s_tb))
+		return REPEAT_SEARCH;
+
+	/* if it possible in indirect_to_direct conversion */
+	if (buffer_locked(p_s_tbS0)) {
+		__wait_on_buffer(p_s_tbS0);
+		if (FILESYSTEM_CHANGED_TB(p_s_tb))
+			return REPEAT_SEARCH;
+	}
+#ifdef CONFIG_REISERFS_CHECK
+	if (cur_tb) {
+		print_cur_tb("fix_nodes");
+		reiserfs_panic(p_s_tb->tb_sb,
+			       "PAP-8305: fix_nodes:  there is pending do_balance");
+	}
+
+	if (!buffer_uptodate(p_s_tbS0) || !B_IS_IN_TREE(p_s_tbS0)) {
+		reiserfs_panic(p_s_tb->tb_sb,
+			       "PAP-8320: fix_nodes: S[0] (%b %z) is not uptodate "
+			       "at the beginning of fix_nodes or not in tree (mode %c)",
+			       p_s_tbS0, p_s_tbS0, n_op_mode);
+	}
+
+	/* Check parameters. */
+	switch (n_op_mode) {
+	case M_INSERT:
+		if (n_item_num <= 0 || n_item_num > B_NR_ITEMS(p_s_tbS0))
+			reiserfs_panic(p_s_tb->tb_sb,
+				       "PAP-8330: fix_nodes: Incorrect item number %d (in S0 - %d) in case of insert",
+				       n_item_num, B_NR_ITEMS(p_s_tbS0));
+		break;
+	case M_PASTE:
+	case M_DELETE:
+	case M_CUT:
+		if (n_item_num < 0 || n_item_num >= B_NR_ITEMS(p_s_tbS0)) {
+			print_block(p_s_tbS0, 0, -1, -1);
+			reiserfs_panic(p_s_tb->tb_sb,
+				       "PAP-8335: fix_nodes: Incorrect item number(%d); mode = %c insert_size = %d\n",
+				       n_item_num, n_op_mode,
+				       p_s_tb->insert_size[0]);
+		}
+		break;
+	default:
+		reiserfs_panic(p_s_tb->tb_sb,
+			       "PAP-8340: fix_nodes: Incorrect mode of operation");
+	}
+#endif
+
+	if (get_mem_for_virtual_node(p_s_tb) == REPEAT_SEARCH)
+		// FIXME: maybe -ENOMEM when tb->vn_buf == 0? Now just repeat
+		return REPEAT_SEARCH;
+
+	/* Starting from the leaf level; for all levels n_h of the tree. */
+	for (n_h = 0; n_h < MAX_HEIGHT && p_s_tb->insert_size[n_h]; n_h++) {
+		if ((n_ret_value = get_direct_parent(p_s_tb, n_h)) != CARRY_ON) {
+			goto repeat;
+		}
+
+		if ((n_ret_value =
+		     check_balance(n_op_mode, p_s_tb, n_h, n_item_num,
+				   n_pos_in_item, p_s_ins_ih,
+				   data)) != CARRY_ON) {
+			if (n_ret_value == NO_BALANCING_NEEDED) {
+				/* No balancing for higher levels needed. */
+				if ((n_ret_value =
+				     get_neighbors(p_s_tb, n_h)) != CARRY_ON) {
+					goto repeat;
+				}
+				if (n_h != MAX_HEIGHT - 1)
+					p_s_tb->insert_size[n_h + 1] = 0;
+				/* ok, analysis and resource gathering are complete */
+				break;
+			}
+			goto repeat;
+		}
+
+		if ((n_ret_value = get_neighbors(p_s_tb, n_h)) != CARRY_ON) {
+			goto repeat;
+		}
+
+		if ((n_ret_value = get_empty_nodes(p_s_tb, n_h)) != CARRY_ON) {
+			goto repeat;	/* No disk space, or schedule occurred and
+					   analysis may be invalid and needs to be redone. */
+		}
+
+		if (!PATH_H_PBUFFER(p_s_tb->tb_path, n_h)) {
+			/* We have a positive insert size but no nodes exist on this
+			   level, this means that we are creating a new root. */
+
+			RFALSE(p_s_tb->blknum[n_h] != 1,
+			       "PAP-8350: creating new empty root");
+
+			if (n_h < MAX_HEIGHT - 1)
+				p_s_tb->insert_size[n_h + 1] = 0;
+		} else if (!PATH_H_PBUFFER(p_s_tb->tb_path, n_h + 1)) {
+			if (p_s_tb->blknum[n_h] > 1) {
+				/* The tree needs to be grown, so this node S[n_h]
+				   which is the root node is split into two nodes,
+				   and a new node (S[n_h+1]) will be created to
+				   become the root node.  */
+
+				RFALSE(n_h == MAX_HEIGHT - 1,
+				       "PAP-8355: attempt to create too high of a tree");
+
+				p_s_tb->insert_size[n_h + 1] =
+				    (DC_SIZE +
+				     KEY_SIZE) * (p_s_tb->blknum[n_h] - 1) +
+				    DC_SIZE;
+			} else if (n_h < MAX_HEIGHT - 1)
+				p_s_tb->insert_size[n_h + 1] = 0;
+		} else
+			p_s_tb->insert_size[n_h + 1] =
+			    (DC_SIZE + KEY_SIZE) * (p_s_tb->blknum[n_h] - 1);
+	}
+
+	if ((n_ret_value = wait_tb_buffers_until_unlocked(p_s_tb)) == CARRY_ON) {
+		if (FILESYSTEM_CHANGED_TB(p_s_tb)) {
+			wait_tb_buffers_run = 1;
+			n_ret_value = REPEAT_SEARCH;
+			goto repeat;
+		} else {
+			return CARRY_ON;
+		}
+	} else {
+		wait_tb_buffers_run = 1;
+		goto repeat;
+	}
+
+      repeat:
+	// fix_nodes was unable to perform its calculation due to
+	// filesystem got changed under us, lack of free disk space or i/o
+	// failure. If the first is the case - the search will be
+	// repeated. For now - free all resources acquired so far except
+	// for the new allocated nodes
+	{
+		int i;
+
+		/* Release path buffers. */
+		if (wait_tb_buffers_run) {
+			pathrelse_and_restore(p_s_tb->tb_sb, p_s_tb->tb_path);
+		} else {
+			pathrelse(p_s_tb->tb_path);
+		}
+		/* brelse all resources collected for balancing */
+		for (i = 0; i < MAX_HEIGHT; i++) {
+			if (wait_tb_buffers_run) {
+				reiserfs_restore_prepared_buffer(p_s_tb->tb_sb,
+								 p_s_tb->L[i]);
+				reiserfs_restore_prepared_buffer(p_s_tb->tb_sb,
+								 p_s_tb->R[i]);
+				reiserfs_restore_prepared_buffer(p_s_tb->tb_sb,
+								 p_s_tb->FL[i]);
+				reiserfs_restore_prepared_buffer(p_s_tb->tb_sb,
+								 p_s_tb->FR[i]);
+				reiserfs_restore_prepared_buffer(p_s_tb->tb_sb,
+								 p_s_tb->
+								 CFL[i]);
+				reiserfs_restore_prepared_buffer(p_s_tb->tb_sb,
+								 p_s_tb->
+								 CFR[i]);
+			}
+
+			brelse(p_s_tb->L[i]);
+			p_s_tb->L[i] = NULL;
+			brelse(p_s_tb->R[i]);
+			p_s_tb->R[i] = NULL;
+			brelse(p_s_tb->FL[i]);
+			p_s_tb->FL[i] = NULL;
+			brelse(p_s_tb->FR[i]);
+			p_s_tb->FR[i] = NULL;
+			brelse(p_s_tb->CFL[i]);
+			p_s_tb->CFL[i] = NULL;
+			brelse(p_s_tb->CFR[i]);
+			p_s_tb->CFR[i] = NULL;
+		}
+
+		if (wait_tb_buffers_run) {
+			for (i = 0; i < MAX_FEB_SIZE; i++) {
+				if (p_s_tb->FEB[i]) {
+					reiserfs_restore_prepared_buffer
+					    (p_s_tb->tb_sb, p_s_tb->FEB[i]);
+				}
+			}
+		}
+		return n_ret_value;
+	}
+
+}
+
+/* Anatoly will probably forgive me renaming p_s_tb to tb. I just
+   wanted to make lines shorter */
+void unfix_nodes(struct tree_balance *tb)
+{
+	int i;
+
+	/* Release path buffers. */
+	pathrelse_and_restore(tb->tb_sb, tb->tb_path);
+
+	/* brelse all resources collected for balancing */
+	for (i = 0; i < MAX_HEIGHT; i++) {
+		reiserfs_restore_prepared_buffer(tb->tb_sb, tb->L[i]);
+		reiserfs_restore_prepared_buffer(tb->tb_sb, tb->R[i]);
+		reiserfs_restore_prepared_buffer(tb->tb_sb, tb->FL[i]);
+		reiserfs_restore_prepared_buffer(tb->tb_sb, tb->FR[i]);
+		reiserfs_restore_prepared_buffer(tb->tb_sb, tb->CFL[i]);
+		reiserfs_restore_prepared_buffer(tb->tb_sb, tb->CFR[i]);
+
+		brelse(tb->L[i]);
+		brelse(tb->R[i]);
+		brelse(tb->FL[i]);
+		brelse(tb->FR[i]);
+		brelse(tb->CFL[i]);
+		brelse(tb->CFR[i]);
+	}
+
+	/* deal with list of allocated (used and unused) nodes */
+	for (i = 0; i < MAX_FEB_SIZE; i++) {
+		if (tb->FEB[i]) {
+			b_blocknr_t blocknr = tb->FEB[i]->b_blocknr;
+			/* de-allocated block which was not used by balancing and
+			   bforget about buffer for it */
+			brelse(tb->FEB[i]);
+			reiserfs_free_block(tb->transaction_handle, NULL,
+					    blocknr, 0);
+		}
+		if (tb->used[i]) {
+			/* release used as new nodes including a new root */
+			brelse(tb->used[i]);
+		}
+	}
+
+	kfree(tb->vn_buf);
+
+}
diff --git a/fs/reiserfs/hashes.c b/fs/reiserfs/hashes.c
new file mode 100644
index 0000000..e664ac1
--- /dev/null
+++ b/fs/reiserfs/hashes.c
@@ -0,0 +1,182 @@
+
+/*
+ * Keyed 32-bit hash function using TEA in a Davis-Meyer function
+ *   H0 = Key
+ *   Hi = E Mi(Hi-1) + Hi-1
+ *
+ * (see Applied Cryptography, 2nd edition, p448).
+ *
+ * Jeremy Fitzhardinge <jeremy@zip.com.au> 1998
+ * 
+ * Jeremy has agreed to the contents of reiserfs/README. -Hans
+ * Yura's function is added (04/07/2000)
+ */
+
+//
+// keyed_hash
+// yura_hash
+// r5_hash
+//
+
+#include <linux/kernel.h>
+#include <linux/reiserfs_fs.h>
+#include <asm/types.h>
+
+#define DELTA 0x9E3779B9
+#define FULLROUNDS 10		/* 32 is overkill, 16 is strong crypto */
+#define PARTROUNDS 6		/* 6 gets complete mixing */
+
+/* a, b, c, d - data; h0, h1 - accumulated hash */
+#define TEACORE(rounds)							\
+	do {								\
+		u32 sum = 0;						\
+		int n = rounds;						\
+		u32 b0, b1;						\
+									\
+		b0 = h0;						\
+		b1 = h1;						\
+									\
+		do							\
+		{							\
+			sum += DELTA;					\
+			b0 += ((b1 << 4)+a) ^ (b1+sum) ^ ((b1 >> 5)+b);	\
+			b1 += ((b0 << 4)+c) ^ (b0+sum) ^ ((b0 >> 5)+d);	\
+		} while(--n);						\
+									\
+		h0 += b0;						\
+		h1 += b1;						\
+	} while(0)
+
+u32 keyed_hash(const signed char *msg, int len)
+{
+	u32 k[] = { 0x9464a485, 0x542e1a94, 0x3e846bff, 0xb75bcfc3 };
+
+	u32 h0 = k[0], h1 = k[1];
+	u32 a, b, c, d;
+	u32 pad;
+	int i;
+
+	//      assert(len >= 0 && len < 256);
+
+	pad = (u32) len | ((u32) len << 8);
+	pad |= pad << 16;
+
+	while (len >= 16) {
+		a = (u32) msg[0] |
+		    (u32) msg[1] << 8 | (u32) msg[2] << 16 | (u32) msg[3] << 24;
+		b = (u32) msg[4] |
+		    (u32) msg[5] << 8 | (u32) msg[6] << 16 | (u32) msg[7] << 24;
+		c = (u32) msg[8] |
+		    (u32) msg[9] << 8 |
+		    (u32) msg[10] << 16 | (u32) msg[11] << 24;
+		d = (u32) msg[12] |
+		    (u32) msg[13] << 8 |
+		    (u32) msg[14] << 16 | (u32) msg[15] << 24;
+
+		TEACORE(PARTROUNDS);
+
+		len -= 16;
+		msg += 16;
+	}
+
+	if (len >= 12) {
+		a = (u32) msg[0] |
+		    (u32) msg[1] << 8 | (u32) msg[2] << 16 | (u32) msg[3] << 24;
+		b = (u32) msg[4] |
+		    (u32) msg[5] << 8 | (u32) msg[6] << 16 | (u32) msg[7] << 24;
+		c = (u32) msg[8] |
+		    (u32) msg[9] << 8 |
+		    (u32) msg[10] << 16 | (u32) msg[11] << 24;
+
+		d = pad;
+		for (i = 12; i < len; i++) {
+			d <<= 8;
+			d |= msg[i];
+		}
+	} else if (len >= 8) {
+		a = (u32) msg[0] |
+		    (u32) msg[1] << 8 | (u32) msg[2] << 16 | (u32) msg[3] << 24;
+		b = (u32) msg[4] |
+		    (u32) msg[5] << 8 | (u32) msg[6] << 16 | (u32) msg[7] << 24;
+
+		c = d = pad;
+		for (i = 8; i < len; i++) {
+			c <<= 8;
+			c |= msg[i];
+		}
+	} else if (len >= 4) {
+		a = (u32) msg[0] |
+		    (u32) msg[1] << 8 | (u32) msg[2] << 16 | (u32) msg[3] << 24;
+
+		b = c = d = pad;
+		for (i = 4; i < len; i++) {
+			b <<= 8;
+			b |= msg[i];
+		}
+	} else {
+		a = b = c = d = pad;
+		for (i = 0; i < len; i++) {
+			a <<= 8;
+			a |= msg[i];
+		}
+	}
+
+	TEACORE(FULLROUNDS);
+
+/*	return 0;*/
+	return h0 ^ h1;
+}
+
+/* What follows in this file is copyright 2000 by Hans Reiser, and the
+ * licensing of what follows is governed by reiserfs/README */
+
+u32 yura_hash(const signed char *msg, int len)
+{
+	int j, pow;
+	u32 a, c;
+	int i;
+
+	for (pow = 1, i = 1; i < len; i++)
+		pow = pow * 10;
+
+	if (len == 1)
+		a = msg[0] - 48;
+	else
+		a = (msg[0] - 48) * pow;
+
+	for (i = 1; i < len; i++) {
+		c = msg[i] - 48;
+		for (pow = 1, j = i; j < len - 1; j++)
+			pow = pow * 10;
+		a = a + c * pow;
+	}
+
+	for (; i < 40; i++) {
+		c = '0' - 48;
+		for (pow = 1, j = i; j < len - 1; j++)
+			pow = pow * 10;
+		a = a + c * pow;
+	}
+
+	for (; i < 256; i++) {
+		c = i;
+		for (pow = 1, j = i; j < len - 1; j++)
+			pow = pow * 10;
+		a = a + c * pow;
+	}
+
+	a = a << 7;
+	return a;
+}
+
+u32 r5_hash(const signed char *msg, int len)
+{
+	u32 a = 0;
+	while (*msg) {
+		a += *msg << 4;
+		a += *msg >> 4;
+		a *= 11;
+		msg++;
+	}
+	return a;
+}
diff --git a/fs/reiserfs/ibalance.c b/fs/reiserfs/ibalance.c
new file mode 100644
index 0000000..de391a8
--- /dev/null
+++ b/fs/reiserfs/ibalance.c
@@ -0,0 +1,1089 @@
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ */
+
+#include <asm/uaccess.h>
+#include <linux/string.h>
+#include <linux/time.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/buffer_head.h>
+
+/* this is one and only function that is used outside (do_balance.c) */
+int balance_internal(struct tree_balance *,
+		     int, int, struct item_head *, struct buffer_head **);
+
+/* modes of internal_shift_left, internal_shift_right and internal_insert_childs */
+#define INTERNAL_SHIFT_FROM_S_TO_L 0
+#define INTERNAL_SHIFT_FROM_R_TO_S 1
+#define INTERNAL_SHIFT_FROM_L_TO_S 2
+#define INTERNAL_SHIFT_FROM_S_TO_R 3
+#define INTERNAL_INSERT_TO_S 4
+#define INTERNAL_INSERT_TO_L 5
+#define INTERNAL_INSERT_TO_R 6
+
+static void internal_define_dest_src_infos(int shift_mode,
+					   struct tree_balance *tb,
+					   int h,
+					   struct buffer_info *dest_bi,
+					   struct buffer_info *src_bi,
+					   int *d_key, struct buffer_head **cf)
+{
+	memset(dest_bi, 0, sizeof(struct buffer_info));
+	memset(src_bi, 0, sizeof(struct buffer_info));
+	/* define dest, src, dest parent, dest position */
+	switch (shift_mode) {
+	case INTERNAL_SHIFT_FROM_S_TO_L:	/* used in internal_shift_left */
+		src_bi->tb = tb;
+		src_bi->bi_bh = PATH_H_PBUFFER(tb->tb_path, h);
+		src_bi->bi_parent = PATH_H_PPARENT(tb->tb_path, h);
+		src_bi->bi_position = PATH_H_POSITION(tb->tb_path, h + 1);
+		dest_bi->tb = tb;
+		dest_bi->bi_bh = tb->L[h];
+		dest_bi->bi_parent = tb->FL[h];
+		dest_bi->bi_position = get_left_neighbor_position(tb, h);
+		*d_key = tb->lkey[h];
+		*cf = tb->CFL[h];
+		break;
+	case INTERNAL_SHIFT_FROM_L_TO_S:
+		src_bi->tb = tb;
+		src_bi->bi_bh = tb->L[h];
+		src_bi->bi_parent = tb->FL[h];
+		src_bi->bi_position = get_left_neighbor_position(tb, h);
+		dest_bi->tb = tb;
+		dest_bi->bi_bh = PATH_H_PBUFFER(tb->tb_path, h);
+		dest_bi->bi_parent = PATH_H_PPARENT(tb->tb_path, h);
+		dest_bi->bi_position = PATH_H_POSITION(tb->tb_path, h + 1);	/* dest position is analog of dest->b_item_order */
+		*d_key = tb->lkey[h];
+		*cf = tb->CFL[h];
+		break;
+
+	case INTERNAL_SHIFT_FROM_R_TO_S:	/* used in internal_shift_left */
+		src_bi->tb = tb;
+		src_bi->bi_bh = tb->R[h];
+		src_bi->bi_parent = tb->FR[h];
+		src_bi->bi_position = get_right_neighbor_position(tb, h);
+		dest_bi->tb = tb;
+		dest_bi->bi_bh = PATH_H_PBUFFER(tb->tb_path, h);
+		dest_bi->bi_parent = PATH_H_PPARENT(tb->tb_path, h);
+		dest_bi->bi_position = PATH_H_POSITION(tb->tb_path, h + 1);
+		*d_key = tb->rkey[h];
+		*cf = tb->CFR[h];
+		break;
+
+	case INTERNAL_SHIFT_FROM_S_TO_R:
+		src_bi->tb = tb;
+		src_bi->bi_bh = PATH_H_PBUFFER(tb->tb_path, h);
+		src_bi->bi_parent = PATH_H_PPARENT(tb->tb_path, h);
+		src_bi->bi_position = PATH_H_POSITION(tb->tb_path, h + 1);
+		dest_bi->tb = tb;
+		dest_bi->bi_bh = tb->R[h];
+		dest_bi->bi_parent = tb->FR[h];
+		dest_bi->bi_position = get_right_neighbor_position(tb, h);
+		*d_key = tb->rkey[h];
+		*cf = tb->CFR[h];
+		break;
+
+	case INTERNAL_INSERT_TO_L:
+		dest_bi->tb = tb;
+		dest_bi->bi_bh = tb->L[h];
+		dest_bi->bi_parent = tb->FL[h];
+		dest_bi->bi_position = get_left_neighbor_position(tb, h);
+		break;
+
+	case INTERNAL_INSERT_TO_S:
+		dest_bi->tb = tb;
+		dest_bi->bi_bh = PATH_H_PBUFFER(tb->tb_path, h);
+		dest_bi->bi_parent = PATH_H_PPARENT(tb->tb_path, h);
+		dest_bi->bi_position = PATH_H_POSITION(tb->tb_path, h + 1);
+		break;
+
+	case INTERNAL_INSERT_TO_R:
+		dest_bi->tb = tb;
+		dest_bi->bi_bh = tb->R[h];
+		dest_bi->bi_parent = tb->FR[h];
+		dest_bi->bi_position = get_right_neighbor_position(tb, h);
+		break;
+
+	default:
+		reiserfs_panic(tb->tb_sb,
+			       "internal_define_dest_src_infos: shift type is unknown (%d)",
+			       shift_mode);
+	}
+}
+
+/* Insert count node pointers into buffer cur before position to + 1.
+ * Insert count items into buffer cur before position to.
+ * Items and node pointers are specified by inserted and bh respectively.
+ */
+static void internal_insert_childs(struct buffer_info *cur_bi,
+				   int to, int count,
+				   struct item_head *inserted,
+				   struct buffer_head **bh)
+{
+	struct buffer_head *cur = cur_bi->bi_bh;
+	struct block_head *blkh;
+	int nr;
+	struct reiserfs_key *ih;
+	struct disk_child new_dc[2];
+	struct disk_child *dc;
+	int i;
+
+	if (count <= 0)
+		return;
+
+	blkh = B_BLK_HEAD(cur);
+	nr = blkh_nr_item(blkh);
+
+	RFALSE(count > 2, "too many children (%d) are to be inserted", count);
+	RFALSE(B_FREE_SPACE(cur) < count * (KEY_SIZE + DC_SIZE),
+	       "no enough free space (%d), needed %d bytes",
+	       B_FREE_SPACE(cur), count * (KEY_SIZE + DC_SIZE));
+
+	/* prepare space for count disk_child */
+	dc = B_N_CHILD(cur, to + 1);
+
+	memmove(dc + count, dc, (nr + 1 - (to + 1)) * DC_SIZE);
+
+	/* copy to_be_insert disk children */
+	for (i = 0; i < count; i++) {
+		put_dc_size(&(new_dc[i]),
+			    MAX_CHILD_SIZE(bh[i]) - B_FREE_SPACE(bh[i]));
+		put_dc_block_number(&(new_dc[i]), bh[i]->b_blocknr);
+	}
+	memcpy(dc, new_dc, DC_SIZE * count);
+
+	/* prepare space for count items  */
+	ih = B_N_PDELIM_KEY(cur, ((to == -1) ? 0 : to));
+
+	memmove(ih + count, ih,
+		(nr - to) * KEY_SIZE + (nr + 1 + count) * DC_SIZE);
+
+	/* copy item headers (keys) */
+	memcpy(ih, inserted, KEY_SIZE);
+	if (count > 1)
+		memcpy(ih + 1, inserted + 1, KEY_SIZE);
+
+	/* sizes, item number */
+	set_blkh_nr_item(blkh, blkh_nr_item(blkh) + count);
+	set_blkh_free_space(blkh,
+			    blkh_free_space(blkh) - count * (DC_SIZE +
+							     KEY_SIZE));
+
+	do_balance_mark_internal_dirty(cur_bi->tb, cur, 0);
+
+	/*&&&&&&&&&&&&&&&&&&&&&&&& */
+	check_internal(cur);
+	/*&&&&&&&&&&&&&&&&&&&&&&&& */
+
+	if (cur_bi->bi_parent) {
+		struct disk_child *t_dc =
+		    B_N_CHILD(cur_bi->bi_parent, cur_bi->bi_position);
+		put_dc_size(t_dc,
+			    dc_size(t_dc) + (count * (DC_SIZE + KEY_SIZE)));
+		do_balance_mark_internal_dirty(cur_bi->tb, cur_bi->bi_parent,
+					       0);
+
+		/*&&&&&&&&&&&&&&&&&&&&&&&& */
+		check_internal(cur_bi->bi_parent);
+		/*&&&&&&&&&&&&&&&&&&&&&&&& */
+	}
+
+}
+
+/* Delete del_num items and node pointers from buffer cur starting from *
+ * the first_i'th item and first_p'th pointers respectively.		*/
+static void internal_delete_pointers_items(struct buffer_info *cur_bi,
+					   int first_p,
+					   int first_i, int del_num)
+{
+	struct buffer_head *cur = cur_bi->bi_bh;
+	int nr;
+	struct block_head *blkh;
+	struct reiserfs_key *key;
+	struct disk_child *dc;
+
+	RFALSE(cur == NULL, "buffer is 0");
+	RFALSE(del_num < 0,
+	       "negative number of items (%d) can not be deleted", del_num);
+	RFALSE(first_p < 0 || first_p + del_num > B_NR_ITEMS(cur) + 1
+	       || first_i < 0,
+	       "first pointer order (%d) < 0 or "
+	       "no so many pointers (%d), only (%d) or "
+	       "first key order %d < 0", first_p, first_p + del_num,
+	       B_NR_ITEMS(cur) + 1, first_i);
+	if (del_num == 0)
+		return;
+
+	blkh = B_BLK_HEAD(cur);
+	nr = blkh_nr_item(blkh);
+
+	if (first_p == 0 && del_num == nr + 1) {
+		RFALSE(first_i != 0,
+		       "1st deleted key must have order 0, not %d", first_i);
+		make_empty_node(cur_bi);
+		return;
+	}
+
+	RFALSE(first_i + del_num > B_NR_ITEMS(cur),
+	       "first_i = %d del_num = %d "
+	       "no so many keys (%d) in the node (%b)(%z)",
+	       first_i, del_num, first_i + del_num, cur, cur);
+
+	/* deleting */
+	dc = B_N_CHILD(cur, first_p);
+
+	memmove(dc, dc + del_num, (nr + 1 - first_p - del_num) * DC_SIZE);
+	key = B_N_PDELIM_KEY(cur, first_i);
+	memmove(key, key + del_num,
+		(nr - first_i - del_num) * KEY_SIZE + (nr + 1 -
+						       del_num) * DC_SIZE);
+
+	/* sizes, item number */
+	set_blkh_nr_item(blkh, blkh_nr_item(blkh) - del_num);
+	set_blkh_free_space(blkh,
+			    blkh_free_space(blkh) +
+			    (del_num * (KEY_SIZE + DC_SIZE)));
+
+	do_balance_mark_internal_dirty(cur_bi->tb, cur, 0);
+	/*&&&&&&&&&&&&&&&&&&&&&&& */
+	check_internal(cur);
+	/*&&&&&&&&&&&&&&&&&&&&&&& */
+
+	if (cur_bi->bi_parent) {
+		struct disk_child *t_dc;
+		t_dc = B_N_CHILD(cur_bi->bi_parent, cur_bi->bi_position);
+		put_dc_size(t_dc,
+			    dc_size(t_dc) - (del_num * (KEY_SIZE + DC_SIZE)));
+
+		do_balance_mark_internal_dirty(cur_bi->tb, cur_bi->bi_parent,
+					       0);
+		/*&&&&&&&&&&&&&&&&&&&&&&&& */
+		check_internal(cur_bi->bi_parent);
+		/*&&&&&&&&&&&&&&&&&&&&&&&& */
+	}
+}
+
+/* delete n node pointers and items starting from given position */
+static void internal_delete_childs(struct buffer_info *cur_bi, int from, int n)
+{
+	int i_from;
+
+	i_from = (from == 0) ? from : from - 1;
+
+	/* delete n pointers starting from `from' position in CUR;
+	   delete n keys starting from 'i_from' position in CUR;
+	 */
+	internal_delete_pointers_items(cur_bi, from, i_from, n);
+}
+
+/* copy cpy_num node pointers and cpy_num - 1 items from buffer src to buffer dest
+* last_first == FIRST_TO_LAST means, that we copy first items from src to tail of dest
+ * last_first == LAST_TO_FIRST means, that we copy last items from src to head of dest 
+ */
+static void internal_copy_pointers_items(struct buffer_info *dest_bi,
+					 struct buffer_head *src,
+					 int last_first, int cpy_num)
+{
+	/* ATTENTION! Number of node pointers in DEST is equal to number of items in DEST *
+	 * as delimiting key have already inserted to buffer dest.*/
+	struct buffer_head *dest = dest_bi->bi_bh;
+	int nr_dest, nr_src;
+	int dest_order, src_order;
+	struct block_head *blkh;
+	struct reiserfs_key *key;
+	struct disk_child *dc;
+
+	nr_src = B_NR_ITEMS(src);
+
+	RFALSE(dest == NULL || src == NULL,
+	       "src (%p) or dest (%p) buffer is 0", src, dest);
+	RFALSE(last_first != FIRST_TO_LAST && last_first != LAST_TO_FIRST,
+	       "invalid last_first parameter (%d)", last_first);
+	RFALSE(nr_src < cpy_num - 1,
+	       "no so many items (%d) in src (%d)", cpy_num, nr_src);
+	RFALSE(cpy_num < 0, "cpy_num less than 0 (%d)", cpy_num);
+	RFALSE(cpy_num - 1 + B_NR_ITEMS(dest) > (int)MAX_NR_KEY(dest),
+	       "cpy_num (%d) + item number in dest (%d) can not be > MAX_NR_KEY(%d)",
+	       cpy_num, B_NR_ITEMS(dest), MAX_NR_KEY(dest));
+
+	if (cpy_num == 0)
+		return;
+
+	/* coping */
+	blkh = B_BLK_HEAD(dest);
+	nr_dest = blkh_nr_item(blkh);
+
+	/*dest_order = (last_first == LAST_TO_FIRST) ? 0 : nr_dest; */
+	/*src_order = (last_first == LAST_TO_FIRST) ? (nr_src - cpy_num + 1) : 0; */
+	(last_first == LAST_TO_FIRST) ? (dest_order = 0, src_order =
+					 nr_src - cpy_num + 1) : (dest_order =
+								  nr_dest,
+								  src_order =
+								  0);
+
+	/* prepare space for cpy_num pointers */
+	dc = B_N_CHILD(dest, dest_order);
+
+	memmove(dc + cpy_num, dc, (nr_dest - dest_order) * DC_SIZE);
+
+	/* insert pointers */
+	memcpy(dc, B_N_CHILD(src, src_order), DC_SIZE * cpy_num);
+
+	/* prepare space for cpy_num - 1 item headers */
+	key = B_N_PDELIM_KEY(dest, dest_order);
+	memmove(key + cpy_num - 1, key,
+		KEY_SIZE * (nr_dest - dest_order) + DC_SIZE * (nr_dest +
+							       cpy_num));
+
+	/* insert headers */
+	memcpy(key, B_N_PDELIM_KEY(src, src_order), KEY_SIZE * (cpy_num - 1));
+
+	/* sizes, item number */
+	set_blkh_nr_item(blkh, blkh_nr_item(blkh) + (cpy_num - 1));
+	set_blkh_free_space(blkh,
+			    blkh_free_space(blkh) - (KEY_SIZE * (cpy_num - 1) +
+						     DC_SIZE * cpy_num));
+
+	do_balance_mark_internal_dirty(dest_bi->tb, dest, 0);
+
+	/*&&&&&&&&&&&&&&&&&&&&&&&& */
+	check_internal(dest);
+	/*&&&&&&&&&&&&&&&&&&&&&&&& */
+
+	if (dest_bi->bi_parent) {
+		struct disk_child *t_dc;
+		t_dc = B_N_CHILD(dest_bi->bi_parent, dest_bi->bi_position);
+		put_dc_size(t_dc,
+			    dc_size(t_dc) + (KEY_SIZE * (cpy_num - 1) +
+					     DC_SIZE * cpy_num));
+
+		do_balance_mark_internal_dirty(dest_bi->tb, dest_bi->bi_parent,
+					       0);
+		/*&&&&&&&&&&&&&&&&&&&&&&&& */
+		check_internal(dest_bi->bi_parent);
+		/*&&&&&&&&&&&&&&&&&&&&&&&& */
+	}
+
+}
+
+/* Copy cpy_num node pointers and cpy_num - 1 items from buffer src to buffer dest.
+ * Delete cpy_num - del_par items and node pointers from buffer src.
+ * last_first == FIRST_TO_LAST means, that we copy/delete first items from src.
+ * last_first == LAST_TO_FIRST means, that we copy/delete last items from src.
+ */
+static void internal_move_pointers_items(struct buffer_info *dest_bi,
+					 struct buffer_info *src_bi,
+					 int last_first, int cpy_num,
+					 int del_par)
+{
+	int first_pointer;
+	int first_item;
+
+	internal_copy_pointers_items(dest_bi, src_bi->bi_bh, last_first,
+				     cpy_num);
+
+	if (last_first == FIRST_TO_LAST) {	/* shift_left occurs */
+		first_pointer = 0;
+		first_item = 0;
+		/* delete cpy_num - del_par pointers and keys starting for pointers with first_pointer, 
+		   for key - with first_item */
+		internal_delete_pointers_items(src_bi, first_pointer,
+					       first_item, cpy_num - del_par);
+	} else {		/* shift_right occurs */
+		int i, j;
+
+		i = (cpy_num - del_par ==
+		     (j =
+		      B_NR_ITEMS(src_bi->bi_bh)) + 1) ? 0 : j - cpy_num +
+		    del_par;
+
+		internal_delete_pointers_items(src_bi,
+					       j + 1 - cpy_num + del_par, i,
+					       cpy_num - del_par);
+	}
+}
+
+/* Insert n_src'th key of buffer src before n_dest'th key of buffer dest. */
+static void internal_insert_key(struct buffer_info *dest_bi, int dest_position_before,	/* insert key before key with n_dest number */
+				struct buffer_head *src, int src_position)
+{
+	struct buffer_head *dest = dest_bi->bi_bh;
+	int nr;
+	struct block_head *blkh;
+	struct reiserfs_key *key;
+
+	RFALSE(dest == NULL || src == NULL,
+	       "source(%p) or dest(%p) buffer is 0", src, dest);
+	RFALSE(dest_position_before < 0 || src_position < 0,
+	       "source(%d) or dest(%d) key number less than 0",
+	       src_position, dest_position_before);
+	RFALSE(dest_position_before > B_NR_ITEMS(dest) ||
+	       src_position >= B_NR_ITEMS(src),
+	       "invalid position in dest (%d (key number %d)) or in src (%d (key number %d))",
+	       dest_position_before, B_NR_ITEMS(dest),
+	       src_position, B_NR_ITEMS(src));
+	RFALSE(B_FREE_SPACE(dest) < KEY_SIZE,
+	       "no enough free space (%d) in dest buffer", B_FREE_SPACE(dest));
+
+	blkh = B_BLK_HEAD(dest);
+	nr = blkh_nr_item(blkh);
+
+	/* prepare space for inserting key */
+	key = B_N_PDELIM_KEY(dest, dest_position_before);
+	memmove(key + 1, key,
+		(nr - dest_position_before) * KEY_SIZE + (nr + 1) * DC_SIZE);
+
+	/* insert key */
+	memcpy(key, B_N_PDELIM_KEY(src, src_position), KEY_SIZE);
+
+	/* Change dirt, free space, item number fields. */
+
+	set_blkh_nr_item(blkh, blkh_nr_item(blkh) + 1);
+	set_blkh_free_space(blkh, blkh_free_space(blkh) - KEY_SIZE);
+
+	do_balance_mark_internal_dirty(dest_bi->tb, dest, 0);
+
+	if (dest_bi->bi_parent) {
+		struct disk_child *t_dc;
+		t_dc = B_N_CHILD(dest_bi->bi_parent, dest_bi->bi_position);
+		put_dc_size(t_dc, dc_size(t_dc) + KEY_SIZE);
+
+		do_balance_mark_internal_dirty(dest_bi->tb, dest_bi->bi_parent,
+					       0);
+	}
+}
+
+/* Insert d_key'th (delimiting) key from buffer cfl to tail of dest. 
+ * Copy pointer_amount node pointers and pointer_amount - 1 items from buffer src to buffer dest.
+ * Replace  d_key'th key in buffer cfl.
+ * Delete pointer_amount items and node pointers from buffer src.
+ */
+/* this can be invoked both to shift from S to L and from R to S */
+static void internal_shift_left(int mode,	/* INTERNAL_FROM_S_TO_L | INTERNAL_FROM_R_TO_S */
+				struct tree_balance *tb,
+				int h, int pointer_amount)
+{
+	struct buffer_info dest_bi, src_bi;
+	struct buffer_head *cf;
+	int d_key_position;
+
+	internal_define_dest_src_infos(mode, tb, h, &dest_bi, &src_bi,
+				       &d_key_position, &cf);
+
+	/*printk("pointer_amount = %d\n",pointer_amount); */
+
+	if (pointer_amount) {
+		/* insert delimiting key from common father of dest and src to node dest into position B_NR_ITEM(dest) */
+		internal_insert_key(&dest_bi, B_NR_ITEMS(dest_bi.bi_bh), cf,
+				    d_key_position);
+
+		if (B_NR_ITEMS(src_bi.bi_bh) == pointer_amount - 1) {
+			if (src_bi.bi_position /*src->b_item_order */  == 0)
+				replace_key(tb, cf, d_key_position,
+					    src_bi.
+					    bi_parent /*src->b_parent */ , 0);
+		} else
+			replace_key(tb, cf, d_key_position, src_bi.bi_bh,
+				    pointer_amount - 1);
+	}
+	/* last parameter is del_parameter */
+	internal_move_pointers_items(&dest_bi, &src_bi, FIRST_TO_LAST,
+				     pointer_amount, 0);
+
+}
+
+/* Insert delimiting key to L[h].
+ * Copy n node pointers and n - 1 items from buffer S[h] to L[h].
+ * Delete n - 1 items and node pointers from buffer S[h].
+ */
+/* it always shifts from S[h] to L[h] */
+static void internal_shift1_left(struct tree_balance *tb,
+				 int h, int pointer_amount)
+{
+	struct buffer_info dest_bi, src_bi;
+	struct buffer_head *cf;
+	int d_key_position;
+
+	internal_define_dest_src_infos(INTERNAL_SHIFT_FROM_S_TO_L, tb, h,
+				       &dest_bi, &src_bi, &d_key_position, &cf);
+
+	if (pointer_amount > 0)	/* insert lkey[h]-th key  from CFL[h] to left neighbor L[h] */
+		internal_insert_key(&dest_bi, B_NR_ITEMS(dest_bi.bi_bh), cf,
+				    d_key_position);
+	/*            internal_insert_key (tb->L[h], B_NR_ITEM(tb->L[h]), tb->CFL[h], tb->lkey[h]); */
+
+	/* last parameter is del_parameter */
+	internal_move_pointers_items(&dest_bi, &src_bi, FIRST_TO_LAST,
+				     pointer_amount, 1);
+	/*    internal_move_pointers_items (tb->L[h], tb->S[h], FIRST_TO_LAST, pointer_amount, 1); */
+}
+
+/* Insert d_key'th (delimiting) key from buffer cfr to head of dest. 
+ * Copy n node pointers and n - 1 items from buffer src to buffer dest.
+ * Replace  d_key'th key in buffer cfr.
+ * Delete n items and node pointers from buffer src.
+ */
+static void internal_shift_right(int mode,	/* INTERNAL_FROM_S_TO_R | INTERNAL_FROM_L_TO_S */
+				 struct tree_balance *tb,
+				 int h, int pointer_amount)
+{
+	struct buffer_info dest_bi, src_bi;
+	struct buffer_head *cf;
+	int d_key_position;
+	int nr;
+
+	internal_define_dest_src_infos(mode, tb, h, &dest_bi, &src_bi,
+				       &d_key_position, &cf);
+
+	nr = B_NR_ITEMS(src_bi.bi_bh);
+
+	if (pointer_amount > 0) {
+		/* insert delimiting key from common father of dest and src to dest node into position 0 */
+		internal_insert_key(&dest_bi, 0, cf, d_key_position);
+		if (nr == pointer_amount - 1) {
+			RFALSE(src_bi.bi_bh != PATH_H_PBUFFER(tb->tb_path, h) /*tb->S[h] */ ||
+			       dest_bi.bi_bh != tb->R[h],
+			       "src (%p) must be == tb->S[h](%p) when it disappears",
+			       src_bi.bi_bh, PATH_H_PBUFFER(tb->tb_path, h));
+			/* when S[h] disappers replace left delemiting key as well */
+			if (tb->CFL[h])
+				replace_key(tb, cf, d_key_position, tb->CFL[h],
+					    tb->lkey[h]);
+		} else
+			replace_key(tb, cf, d_key_position, src_bi.bi_bh,
+				    nr - pointer_amount);
+	}
+
+	/* last parameter is del_parameter */
+	internal_move_pointers_items(&dest_bi, &src_bi, LAST_TO_FIRST,
+				     pointer_amount, 0);
+}
+
+/* Insert delimiting key to R[h].
+ * Copy n node pointers and n - 1 items from buffer S[h] to R[h].
+ * Delete n - 1 items and node pointers from buffer S[h].
+ */
+/* it always shift from S[h] to R[h] */
+static void internal_shift1_right(struct tree_balance *tb,
+				  int h, int pointer_amount)
+{
+	struct buffer_info dest_bi, src_bi;
+	struct buffer_head *cf;
+	int d_key_position;
+
+	internal_define_dest_src_infos(INTERNAL_SHIFT_FROM_S_TO_R, tb, h,
+				       &dest_bi, &src_bi, &d_key_position, &cf);
+
+	if (pointer_amount > 0)	/* insert rkey from CFR[h] to right neighbor R[h] */
+		internal_insert_key(&dest_bi, 0, cf, d_key_position);
+	/*            internal_insert_key (tb->R[h], 0, tb->CFR[h], tb->rkey[h]); */
+
+	/* last parameter is del_parameter */
+	internal_move_pointers_items(&dest_bi, &src_bi, LAST_TO_FIRST,
+				     pointer_amount, 1);
+	/*    internal_move_pointers_items (tb->R[h], tb->S[h], LAST_TO_FIRST, pointer_amount, 1); */
+}
+
+/* Delete insert_num node pointers together with their left items
+ * and balance current node.*/
+static void balance_internal_when_delete(struct tree_balance *tb,
+					 int h, int child_pos)
+{
+	int insert_num;
+	int n;
+	struct buffer_head *tbSh = PATH_H_PBUFFER(tb->tb_path, h);
+	struct buffer_info bi;
+
+	insert_num = tb->insert_size[h] / ((int)(DC_SIZE + KEY_SIZE));
+
+	/* delete child-node-pointer(s) together with their left item(s) */
+	bi.tb = tb;
+	bi.bi_bh = tbSh;
+	bi.bi_parent = PATH_H_PPARENT(tb->tb_path, h);
+	bi.bi_position = PATH_H_POSITION(tb->tb_path, h + 1);
+
+	internal_delete_childs(&bi, child_pos, -insert_num);
+
+	RFALSE(tb->blknum[h] > 1,
+	       "tb->blknum[%d]=%d when insert_size < 0", h, tb->blknum[h]);
+
+	n = B_NR_ITEMS(tbSh);
+
+	if (tb->lnum[h] == 0 && tb->rnum[h] == 0) {
+		if (tb->blknum[h] == 0) {
+			/* node S[h] (root of the tree) is empty now */
+			struct buffer_head *new_root;
+
+			RFALSE(n
+			       || B_FREE_SPACE(tbSh) !=
+			       MAX_CHILD_SIZE(tbSh) - DC_SIZE,
+			       "buffer must have only 0 keys (%d)", n);
+			RFALSE(bi.bi_parent, "root has parent (%p)",
+			       bi.bi_parent);
+
+			/* choose a new root */
+			if (!tb->L[h - 1] || !B_NR_ITEMS(tb->L[h - 1]))
+				new_root = tb->R[h - 1];
+			else
+				new_root = tb->L[h - 1];
+			/* switch super block's tree root block number to the new value */
+			PUT_SB_ROOT_BLOCK(tb->tb_sb, new_root->b_blocknr);
+			//REISERFS_SB(tb->tb_sb)->s_rs->s_tree_height --;
+			PUT_SB_TREE_HEIGHT(tb->tb_sb,
+					   SB_TREE_HEIGHT(tb->tb_sb) - 1);
+
+			do_balance_mark_sb_dirty(tb,
+						 REISERFS_SB(tb->tb_sb)->s_sbh,
+						 1);
+			/*&&&&&&&&&&&&&&&&&&&&&& */
+			if (h > 1)
+				/* use check_internal if new root is an internal node */
+				check_internal(new_root);
+			/*&&&&&&&&&&&&&&&&&&&&&& */
+
+			/* do what is needed for buffer thrown from tree */
+			reiserfs_invalidate_buffer(tb, tbSh);
+			return;
+		}
+		return;
+	}
+
+	if (tb->L[h] && tb->lnum[h] == -B_NR_ITEMS(tb->L[h]) - 1) {	/* join S[h] with L[h] */
+
+		RFALSE(tb->rnum[h] != 0,
+		       "invalid tb->rnum[%d]==%d when joining S[h] with L[h]",
+		       h, tb->rnum[h]);
+
+		internal_shift_left(INTERNAL_SHIFT_FROM_S_TO_L, tb, h, n + 1);
+		reiserfs_invalidate_buffer(tb, tbSh);
+
+		return;
+	}
+
+	if (tb->R[h] && tb->rnum[h] == -B_NR_ITEMS(tb->R[h]) - 1) {	/* join S[h] with R[h] */
+		RFALSE(tb->lnum[h] != 0,
+		       "invalid tb->lnum[%d]==%d when joining S[h] with R[h]",
+		       h, tb->lnum[h]);
+
+		internal_shift_right(INTERNAL_SHIFT_FROM_S_TO_R, tb, h, n + 1);
+
+		reiserfs_invalidate_buffer(tb, tbSh);
+		return;
+	}
+
+	if (tb->lnum[h] < 0) {	/* borrow from left neighbor L[h] */
+		RFALSE(tb->rnum[h] != 0,
+		       "wrong tb->rnum[%d]==%d when borrow from L[h]", h,
+		       tb->rnum[h]);
+		/*internal_shift_right (tb, h, tb->L[h], tb->CFL[h], tb->lkey[h], tb->S[h], -tb->lnum[h]); */
+		internal_shift_right(INTERNAL_SHIFT_FROM_L_TO_S, tb, h,
+				     -tb->lnum[h]);
+		return;
+	}
+
+	if (tb->rnum[h] < 0) {	/* borrow from right neighbor R[h] */
+		RFALSE(tb->lnum[h] != 0,
+		       "invalid tb->lnum[%d]==%d when borrow from R[h]",
+		       h, tb->lnum[h]);
+		internal_shift_left(INTERNAL_SHIFT_FROM_R_TO_S, tb, h, -tb->rnum[h]);	/*tb->S[h], tb->CFR[h], tb->rkey[h], tb->R[h], -tb->rnum[h]); */
+		return;
+	}
+
+	if (tb->lnum[h] > 0) {	/* split S[h] into two parts and put them into neighbors */
+		RFALSE(tb->rnum[h] == 0 || tb->lnum[h] + tb->rnum[h] != n + 1,
+		       "invalid tb->lnum[%d]==%d or tb->rnum[%d]==%d when S[h](item number == %d) is split between them",
+		       h, tb->lnum[h], h, tb->rnum[h], n);
+
+		internal_shift_left(INTERNAL_SHIFT_FROM_S_TO_L, tb, h, tb->lnum[h]);	/*tb->L[h], tb->CFL[h], tb->lkey[h], tb->S[h], tb->lnum[h]); */
+		internal_shift_right(INTERNAL_SHIFT_FROM_S_TO_R, tb, h,
+				     tb->rnum[h]);
+
+		reiserfs_invalidate_buffer(tb, tbSh);
+
+		return;
+	}
+	reiserfs_panic(tb->tb_sb,
+		       "balance_internal_when_delete: unexpected tb->lnum[%d]==%d or tb->rnum[%d]==%d",
+		       h, tb->lnum[h], h, tb->rnum[h]);
+}
+
+/* Replace delimiting key of buffers L[h] and S[h] by the given key.*/
+static void replace_lkey(struct tree_balance *tb, int h, struct item_head *key)
+{
+	RFALSE(tb->L[h] == NULL || tb->CFL[h] == NULL,
+	       "L[h](%p) and CFL[h](%p) must exist in replace_lkey",
+	       tb->L[h], tb->CFL[h]);
+
+	if (B_NR_ITEMS(PATH_H_PBUFFER(tb->tb_path, h)) == 0)
+		return;
+
+	memcpy(B_N_PDELIM_KEY(tb->CFL[h], tb->lkey[h]), key, KEY_SIZE);
+
+	do_balance_mark_internal_dirty(tb, tb->CFL[h], 0);
+}
+
+/* Replace delimiting key of buffers S[h] and R[h] by the given key.*/
+static void replace_rkey(struct tree_balance *tb, int h, struct item_head *key)
+{
+	RFALSE(tb->R[h] == NULL || tb->CFR[h] == NULL,
+	       "R[h](%p) and CFR[h](%p) must exist in replace_rkey",
+	       tb->R[h], tb->CFR[h]);
+	RFALSE(B_NR_ITEMS(tb->R[h]) == 0,
+	       "R[h] can not be empty if it exists (item number=%d)",
+	       B_NR_ITEMS(tb->R[h]));
+
+	memcpy(B_N_PDELIM_KEY(tb->CFR[h], tb->rkey[h]), key, KEY_SIZE);
+
+	do_balance_mark_internal_dirty(tb, tb->CFR[h], 0);
+}
+
+int balance_internal(struct tree_balance *tb,	/* tree_balance structure               */
+		     int h,	/* level of the tree                    */
+		     int child_pos, struct item_head *insert_key,	/* key for insertion on higher level    */
+		     struct buffer_head **insert_ptr	/* node for insertion on higher level */
+    )
+    /* if inserting/pasting
+       {
+       child_pos is the position of the node-pointer in S[h] that        *
+       pointed to S[h-1] before balancing of the h-1 level;              *
+       this means that new pointers and items must be inserted AFTER *
+       child_pos
+       }
+       else 
+       {
+       it is the position of the leftmost pointer that must be deleted (together with
+       its corresponding key to the left of the pointer)
+       as a result of the previous level's balancing.
+       }
+     */
+{
+	struct buffer_head *tbSh = PATH_H_PBUFFER(tb->tb_path, h);
+	struct buffer_info bi;
+	int order;		/* we return this: it is 0 if there is no S[h], else it is tb->S[h]->b_item_order */
+	int insert_num, n, k;
+	struct buffer_head *S_new;
+	struct item_head new_insert_key;
+	struct buffer_head *new_insert_ptr = NULL;
+	struct item_head *new_insert_key_addr = insert_key;
+
+	RFALSE(h < 1, "h (%d) can not be < 1 on internal level", h);
+
+	PROC_INFO_INC(tb->tb_sb, balance_at[h]);
+
+	order =
+	    (tbSh) ? PATH_H_POSITION(tb->tb_path,
+				     h + 1) /*tb->S[h]->b_item_order */ : 0;
+
+	/* Using insert_size[h] calculate the number insert_num of items
+	   that must be inserted to or deleted from S[h]. */
+	insert_num = tb->insert_size[h] / ((int)(KEY_SIZE + DC_SIZE));
+
+	/* Check whether insert_num is proper * */
+	RFALSE(insert_num < -2 || insert_num > 2,
+	       "incorrect number of items inserted to the internal node (%d)",
+	       insert_num);
+	RFALSE(h > 1 && (insert_num > 1 || insert_num < -1),
+	       "incorrect number of items (%d) inserted to the internal node on a level (h=%d) higher than last internal level",
+	       insert_num, h);
+
+	/* Make balance in case insert_num < 0 */
+	if (insert_num < 0) {
+		balance_internal_when_delete(tb, h, child_pos);
+		return order;
+	}
+
+	k = 0;
+	if (tb->lnum[h] > 0) {
+		/* shift lnum[h] items from S[h] to the left neighbor L[h].
+		   check how many of new items fall into L[h] or CFL[h] after
+		   shifting */
+		n = B_NR_ITEMS(tb->L[h]);	/* number of items in L[h] */
+		if (tb->lnum[h] <= child_pos) {
+			/* new items don't fall into L[h] or CFL[h] */
+			internal_shift_left(INTERNAL_SHIFT_FROM_S_TO_L, tb, h,
+					    tb->lnum[h]);
+			/*internal_shift_left (tb->L[h],tb->CFL[h],tb->lkey[h],tbSh,tb->lnum[h]); */
+			child_pos -= tb->lnum[h];
+		} else if (tb->lnum[h] > child_pos + insert_num) {
+			/* all new items fall into L[h] */
+			internal_shift_left(INTERNAL_SHIFT_FROM_S_TO_L, tb, h,
+					    tb->lnum[h] - insert_num);
+			/*                  internal_shift_left(tb->L[h],tb->CFL[h],tb->lkey[h],tbSh,
+			   tb->lnum[h]-insert_num);
+			 */
+			/* insert insert_num keys and node-pointers into L[h] */
+			bi.tb = tb;
+			bi.bi_bh = tb->L[h];
+			bi.bi_parent = tb->FL[h];
+			bi.bi_position = get_left_neighbor_position(tb, h);
+			internal_insert_childs(&bi,
+					       /*tb->L[h], tb->S[h-1]->b_next */
+					       n + child_pos + 1,
+					       insert_num, insert_key,
+					       insert_ptr);
+
+			insert_num = 0;
+		} else {
+			struct disk_child *dc;
+
+			/* some items fall into L[h] or CFL[h], but some don't fall */
+			internal_shift1_left(tb, h, child_pos + 1);
+			/* calculate number of new items that fall into L[h] */
+			k = tb->lnum[h] - child_pos - 1;
+			bi.tb = tb;
+			bi.bi_bh = tb->L[h];
+			bi.bi_parent = tb->FL[h];
+			bi.bi_position = get_left_neighbor_position(tb, h);
+			internal_insert_childs(&bi,
+					       /*tb->L[h], tb->S[h-1]->b_next, */
+					       n + child_pos + 1, k,
+					       insert_key, insert_ptr);
+
+			replace_lkey(tb, h, insert_key + k);
+
+			/* replace the first node-ptr in S[h] by node-ptr to insert_ptr[k] */
+			dc = B_N_CHILD(tbSh, 0);
+			put_dc_size(dc,
+				    MAX_CHILD_SIZE(insert_ptr[k]) -
+				    B_FREE_SPACE(insert_ptr[k]));
+			put_dc_block_number(dc, insert_ptr[k]->b_blocknr);
+
+			do_balance_mark_internal_dirty(tb, tbSh, 0);
+
+			k++;
+			insert_key += k;
+			insert_ptr += k;
+			insert_num -= k;
+			child_pos = 0;
+		}
+	}
+	/* tb->lnum[h] > 0 */
+	if (tb->rnum[h] > 0) {
+		/*shift rnum[h] items from S[h] to the right neighbor R[h] */
+		/* check how many of new items fall into R or CFR after shifting */
+		n = B_NR_ITEMS(tbSh);	/* number of items in S[h] */
+		if (n - tb->rnum[h] >= child_pos)
+			/* new items fall into S[h] */
+			/*internal_shift_right(tb,h,tbSh,tb->CFR[h],tb->rkey[h],tb->R[h],tb->rnum[h]); */
+			internal_shift_right(INTERNAL_SHIFT_FROM_S_TO_R, tb, h,
+					     tb->rnum[h]);
+		else if (n + insert_num - tb->rnum[h] < child_pos) {
+			/* all new items fall into R[h] */
+			/*internal_shift_right(tb,h,tbSh,tb->CFR[h],tb->rkey[h],tb->R[h],
+			   tb->rnum[h] - insert_num); */
+			internal_shift_right(INTERNAL_SHIFT_FROM_S_TO_R, tb, h,
+					     tb->rnum[h] - insert_num);
+
+			/* insert insert_num keys and node-pointers into R[h] */
+			bi.tb = tb;
+			bi.bi_bh = tb->R[h];
+			bi.bi_parent = tb->FR[h];
+			bi.bi_position = get_right_neighbor_position(tb, h);
+			internal_insert_childs(&bi,
+					       /*tb->R[h],tb->S[h-1]->b_next */
+					       child_pos - n - insert_num +
+					       tb->rnum[h] - 1,
+					       insert_num, insert_key,
+					       insert_ptr);
+			insert_num = 0;
+		} else {
+			struct disk_child *dc;
+
+			/* one of the items falls into CFR[h] */
+			internal_shift1_right(tb, h, n - child_pos + 1);
+			/* calculate number of new items that fall into R[h] */
+			k = tb->rnum[h] - n + child_pos - 1;
+			bi.tb = tb;
+			bi.bi_bh = tb->R[h];
+			bi.bi_parent = tb->FR[h];
+			bi.bi_position = get_right_neighbor_position(tb, h);
+			internal_insert_childs(&bi,
+					       /*tb->R[h], tb->R[h]->b_child, */
+					       0, k, insert_key + 1,
+					       insert_ptr + 1);
+
+			replace_rkey(tb, h, insert_key + insert_num - k - 1);
+
+			/* replace the first node-ptr in R[h] by node-ptr insert_ptr[insert_num-k-1] */
+			dc = B_N_CHILD(tb->R[h], 0);
+			put_dc_size(dc,
+				    MAX_CHILD_SIZE(insert_ptr
+						   [insert_num - k - 1]) -
+				    B_FREE_SPACE(insert_ptr
+						 [insert_num - k - 1]));
+			put_dc_block_number(dc,
+					    insert_ptr[insert_num - k -
+						       1]->b_blocknr);
+
+			do_balance_mark_internal_dirty(tb, tb->R[h], 0);
+
+			insert_num -= (k + 1);
+		}
+	}
+
+    /** Fill new node that appears instead of S[h] **/
+	RFALSE(tb->blknum[h] > 2, "blknum can not be > 2 for internal level");
+	RFALSE(tb->blknum[h] < 0, "blknum can not be < 0");
+
+	if (!tb->blknum[h]) {	/* node S[h] is empty now */
+		RFALSE(!tbSh, "S[h] is equal NULL");
+
+		/* do what is needed for buffer thrown from tree */
+		reiserfs_invalidate_buffer(tb, tbSh);
+		return order;
+	}
+
+	if (!tbSh) {
+		/* create new root */
+		struct disk_child *dc;
+		struct buffer_head *tbSh_1 = PATH_H_PBUFFER(tb->tb_path, h - 1);
+		struct block_head *blkh;
+
+		if (tb->blknum[h] != 1)
+			reiserfs_panic(NULL,
+				       "balance_internal: One new node required for creating the new root");
+		/* S[h] = empty buffer from the list FEB. */
+		tbSh = get_FEB(tb);
+		blkh = B_BLK_HEAD(tbSh);
+		set_blkh_level(blkh, h + 1);
+
+		/* Put the unique node-pointer to S[h] that points to S[h-1]. */
+
+		dc = B_N_CHILD(tbSh, 0);
+		put_dc_block_number(dc, tbSh_1->b_blocknr);
+		put_dc_size(dc,
+			    (MAX_CHILD_SIZE(tbSh_1) - B_FREE_SPACE(tbSh_1)));
+
+		tb->insert_size[h] -= DC_SIZE;
+		set_blkh_free_space(blkh, blkh_free_space(blkh) - DC_SIZE);
+
+		do_balance_mark_internal_dirty(tb, tbSh, 0);
+
+		/*&&&&&&&&&&&&&&&&&&&&&&&& */
+		check_internal(tbSh);
+		/*&&&&&&&&&&&&&&&&&&&&&&&& */
+
+		/* put new root into path structure */
+		PATH_OFFSET_PBUFFER(tb->tb_path, ILLEGAL_PATH_ELEMENT_OFFSET) =
+		    tbSh;
+
+		/* Change root in structure super block. */
+		PUT_SB_ROOT_BLOCK(tb->tb_sb, tbSh->b_blocknr);
+		PUT_SB_TREE_HEIGHT(tb->tb_sb, SB_TREE_HEIGHT(tb->tb_sb) + 1);
+		do_balance_mark_sb_dirty(tb, REISERFS_SB(tb->tb_sb)->s_sbh, 1);
+	}
+
+	if (tb->blknum[h] == 2) {
+		int snum;
+		struct buffer_info dest_bi, src_bi;
+
+		/* S_new = free buffer from list FEB */
+		S_new = get_FEB(tb);
+
+		set_blkh_level(B_BLK_HEAD(S_new), h + 1);
+
+		dest_bi.tb = tb;
+		dest_bi.bi_bh = S_new;
+		dest_bi.bi_parent = NULL;
+		dest_bi.bi_position = 0;
+		src_bi.tb = tb;
+		src_bi.bi_bh = tbSh;
+		src_bi.bi_parent = PATH_H_PPARENT(tb->tb_path, h);
+		src_bi.bi_position = PATH_H_POSITION(tb->tb_path, h + 1);
+
+		n = B_NR_ITEMS(tbSh);	/* number of items in S[h] */
+		snum = (insert_num + n + 1) / 2;
+		if (n - snum >= child_pos) {
+			/* new items don't fall into S_new */
+			/*  store the delimiting key for the next level */
+			/* new_insert_key = (n - snum)'th key in S[h] */
+			memcpy(&new_insert_key, B_N_PDELIM_KEY(tbSh, n - snum),
+			       KEY_SIZE);
+			/* last parameter is del_par */
+			internal_move_pointers_items(&dest_bi, &src_bi,
+						     LAST_TO_FIRST, snum, 0);
+			/*            internal_move_pointers_items(S_new, tbSh, LAST_TO_FIRST, snum, 0); */
+		} else if (n + insert_num - snum < child_pos) {
+			/* all new items fall into S_new */
+			/*  store the delimiting key for the next level */
+			/* new_insert_key = (n + insert_item - snum)'th key in S[h] */
+			memcpy(&new_insert_key,
+			       B_N_PDELIM_KEY(tbSh, n + insert_num - snum),
+			       KEY_SIZE);
+			/* last parameter is del_par */
+			internal_move_pointers_items(&dest_bi, &src_bi,
+						     LAST_TO_FIRST,
+						     snum - insert_num, 0);
+			/*                  internal_move_pointers_items(S_new,tbSh,1,snum - insert_num,0); */
+
+			/* insert insert_num keys and node-pointers into S_new */
+			internal_insert_childs(&dest_bi,
+					       /*S_new,tb->S[h-1]->b_next, */
+					       child_pos - n - insert_num +
+					       snum - 1,
+					       insert_num, insert_key,
+					       insert_ptr);
+
+			insert_num = 0;
+		} else {
+			struct disk_child *dc;
+
+			/* some items fall into S_new, but some don't fall */
+			/* last parameter is del_par */
+			internal_move_pointers_items(&dest_bi, &src_bi,
+						     LAST_TO_FIRST,
+						     n - child_pos + 1, 1);
+			/*                  internal_move_pointers_items(S_new,tbSh,1,n - child_pos + 1,1); */
+			/* calculate number of new items that fall into S_new */
+			k = snum - n + child_pos - 1;
+
+			internal_insert_childs(&dest_bi, /*S_new, */ 0, k,
+					       insert_key + 1, insert_ptr + 1);
+
+			/* new_insert_key = insert_key[insert_num - k - 1] */
+			memcpy(&new_insert_key, insert_key + insert_num - k - 1,
+			       KEY_SIZE);
+			/* replace first node-ptr in S_new by node-ptr to insert_ptr[insert_num-k-1] */
+
+			dc = B_N_CHILD(S_new, 0);
+			put_dc_size(dc,
+				    (MAX_CHILD_SIZE
+				     (insert_ptr[insert_num - k - 1]) -
+				     B_FREE_SPACE(insert_ptr
+						  [insert_num - k - 1])));
+			put_dc_block_number(dc,
+					    insert_ptr[insert_num - k -
+						       1]->b_blocknr);
+
+			do_balance_mark_internal_dirty(tb, S_new, 0);
+
+			insert_num -= (k + 1);
+		}
+		/* new_insert_ptr = node_pointer to S_new */
+		new_insert_ptr = S_new;
+
+		RFALSE(!buffer_journaled(S_new) || buffer_journal_dirty(S_new)
+		       || buffer_dirty(S_new), "cm-00001: bad S_new (%b)",
+		       S_new);
+
+		// S_new is released in unfix_nodes
+	}
+
+	n = B_NR_ITEMS(tbSh);	/*number of items in S[h] */
+
+	if (0 <= child_pos && child_pos <= n && insert_num > 0) {
+		bi.tb = tb;
+		bi.bi_bh = tbSh;
+		bi.bi_parent = PATH_H_PPARENT(tb->tb_path, h);
+		bi.bi_position = PATH_H_POSITION(tb->tb_path, h + 1);
+		internal_insert_childs(&bi,	/*tbSh, */
+				       /*          ( tb->S[h-1]->b_parent == tb->S[h] ) ? tb->S[h-1]->b_next :  tb->S[h]->b_child->b_next, */
+				       child_pos, insert_num, insert_key,
+				       insert_ptr);
+	}
+
+	memcpy(new_insert_key_addr, &new_insert_key, KEY_SIZE);
+	insert_ptr[0] = new_insert_ptr;
+
+	return order;
+}
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
new file mode 100644
index 0000000..8a6bfb4
--- /dev/null
+++ b/fs/reiserfs/inode.c
@@ -0,0 +1,3161 @@
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ */
+
+#include <linux/time.h>
+#include <linux/fs.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/reiserfs_acl.h>
+#include <linux/reiserfs_xattr.h>
+#include <linux/exportfs.h>
+#include <linux/smp_lock.h>
+#include <linux/pagemap.h>
+#include <linux/highmem.h>
+#include <asm/uaccess.h>
+#include <asm/unaligned.h>
+#include <linux/buffer_head.h>
+#include <linux/mpage.h>
+#include <linux/writeback.h>
+#include <linux/quotaops.h>
+#include <linux/swap.h>
+
+int reiserfs_commit_write(struct file *f, struct page *page,
+			  unsigned from, unsigned to);
+int reiserfs_prepare_write(struct file *f, struct page *page,
+			   unsigned from, unsigned to);
+
+void reiserfs_delete_inode(struct inode *inode)
+{
+	/* We need blocks for transaction + (user+group) quota update (possibly delete) */
+	int jbegin_count =
+	    JOURNAL_PER_BALANCE_CNT * 2 +
+	    2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb);
+	struct reiserfs_transaction_handle th;
+	int err;
+
+	truncate_inode_pages(&inode->i_data, 0);
+
+	reiserfs_write_lock(inode->i_sb);
+
+	/* The = 0 happens when we abort creating a new inode for some reason like lack of space.. */
+	if (!(inode->i_state & I_NEW) && INODE_PKEY(inode)->k_objectid != 0) {	/* also handles bad_inode case */
+		reiserfs_delete_xattrs(inode);
+
+		if (journal_begin(&th, inode->i_sb, jbegin_count))
+			goto out;
+		reiserfs_update_inode_transaction(inode);
+
+		reiserfs_discard_prealloc(&th, inode);
+
+		err = reiserfs_delete_object(&th, inode);
+
+		/* Do quota update inside a transaction for journaled quotas. We must do that
+		 * after delete_object so that quota updates go into the same transaction as
+		 * stat data deletion */
+		if (!err) 
+			DQUOT_FREE_INODE(inode);
+
+		if (journal_end(&th, inode->i_sb, jbegin_count))
+			goto out;
+
+		/* check return value from reiserfs_delete_object after
+		 * ending the transaction
+		 */
+		if (err)
+		    goto out;
+
+		/* all items of file are deleted, so we can remove "save" link */
+		remove_save_link(inode, 0 /* not truncate */ );	/* we can't do anything
+								 * about an error here */
+	} else {
+		/* no object items are in the tree */
+		;
+	}
+      out:
+	clear_inode(inode);	/* note this must go after the journal_end to prevent deadlock */
+	inode->i_blocks = 0;
+	reiserfs_write_unlock(inode->i_sb);
+}
+
+static void _make_cpu_key(struct cpu_key *key, int version, __u32 dirid,
+			  __u32 objectid, loff_t offset, int type, int length)
+{
+	key->version = version;
+
+	key->on_disk_key.k_dir_id = dirid;
+	key->on_disk_key.k_objectid = objectid;
+	set_cpu_key_k_offset(key, offset);
+	set_cpu_key_k_type(key, type);
+	key->key_length = length;
+}
+
+/* take base of inode_key (it comes from inode always) (dirid, objectid) and version from an inode, set
+   offset and type of key */
+void make_cpu_key(struct cpu_key *key, struct inode *inode, loff_t offset,
+		  int type, int length)
+{
+	_make_cpu_key(key, get_inode_item_key_version(inode),
+		      le32_to_cpu(INODE_PKEY(inode)->k_dir_id),
+		      le32_to_cpu(INODE_PKEY(inode)->k_objectid), offset, type,
+		      length);
+}
+
+//
+// when key is 0, do not set version and short key
+//
+inline void make_le_item_head(struct item_head *ih, const struct cpu_key *key,
+			      int version,
+			      loff_t offset, int type, int length,
+			      int entry_count /*or ih_free_space */ )
+{
+	if (key) {
+		ih->ih_key.k_dir_id = cpu_to_le32(key->on_disk_key.k_dir_id);
+		ih->ih_key.k_objectid =
+		    cpu_to_le32(key->on_disk_key.k_objectid);
+	}
+	put_ih_version(ih, version);
+	set_le_ih_k_offset(ih, offset);
+	set_le_ih_k_type(ih, type);
+	put_ih_item_len(ih, length);
+	/*    set_ih_free_space (ih, 0); */
+	// for directory items it is entry count, for directs and stat
+	// datas - 0xffff, for indirects - 0
+	put_ih_entry_count(ih, entry_count);
+}
+
+//
+// FIXME: we might cache recently accessed indirect item
+
+// Ugh.  Not too eager for that....
+//  I cut the code until such time as I see a convincing argument (benchmark).
+// I don't want a bloated inode struct..., and I don't like code complexity....
+
+/* cutting the code is fine, since it really isn't in use yet and is easy
+** to add back in.  But, Vladimir has a really good idea here.  Think
+** about what happens for reading a file.  For each page,
+** The VFS layer calls reiserfs_readpage, who searches the tree to find
+** an indirect item.  This indirect item has X number of pointers, where
+** X is a big number if we've done the block allocation right.  But,
+** we only use one or two of these pointers during each call to readpage,
+** needlessly researching again later on.
+**
+** The size of the cache could be dynamic based on the size of the file.
+**
+** I'd also like to see us cache the location the stat data item, since
+** we are needlessly researching for that frequently.
+**
+** --chris
+*/
+
+/* If this page has a file tail in it, and
+** it was read in by get_block_create_0, the page data is valid,
+** but tail is still sitting in a direct item, and we can't write to
+** it.  So, look through this page, and check all the mapped buffers
+** to make sure they have valid block numbers.  Any that don't need
+** to be unmapped, so that block_prepare_write will correctly call
+** reiserfs_get_block to convert the tail into an unformatted node
+*/
+static inline void fix_tail_page_for_writing(struct page *page)
+{
+	struct buffer_head *head, *next, *bh;
+
+	if (page && page_has_buffers(page)) {
+		head = page_buffers(page);
+		bh = head;
+		do {
+			next = bh->b_this_page;
+			if (buffer_mapped(bh) && bh->b_blocknr == 0) {
+				reiserfs_unmap_buffer(bh);
+			}
+			bh = next;
+		} while (bh != head);
+	}
+}
+
+/* reiserfs_get_block does not need to allocate a block only if it has been
+   done already or non-hole position has been found in the indirect item */
+static inline int allocation_needed(int retval, b_blocknr_t allocated,
+				    struct item_head *ih,
+				    __le32 * item, int pos_in_item)
+{
+	if (allocated)
+		return 0;
+	if (retval == POSITION_FOUND && is_indirect_le_ih(ih) &&
+	    get_block_num(item, pos_in_item))
+		return 0;
+	return 1;
+}
+
+static inline int indirect_item_found(int retval, struct item_head *ih)
+{
+	return (retval == POSITION_FOUND) && is_indirect_le_ih(ih);
+}
+
+static inline void set_block_dev_mapped(struct buffer_head *bh,
+					b_blocknr_t block, struct inode *inode)
+{
+	map_bh(bh, inode->i_sb, block);
+}
+
+//
+// files which were created in the earlier version can not be longer,
+// than 2 gb
+//
+static int file_capable(struct inode *inode, sector_t block)
+{
+	if (get_inode_item_key_version(inode) != KEY_FORMAT_3_5 ||	// it is new file.
+	    block < (1 << (31 - inode->i_sb->s_blocksize_bits)))	// old file, but 'block' is inside of 2gb
+		return 1;
+
+	return 0;
+}
+
+static int restart_transaction(struct reiserfs_transaction_handle *th,
+			       struct inode *inode, struct treepath *path)
+{
+	struct super_block *s = th->t_super;
+	int len = th->t_blocks_allocated;
+	int err;
+
+	BUG_ON(!th->t_trans_id);
+	BUG_ON(!th->t_refcount);
+
+	pathrelse(path);
+
+	/* we cannot restart while nested */
+	if (th->t_refcount > 1) {
+		return 0;
+	}
+	reiserfs_update_sd(th, inode);
+	err = journal_end(th, s, len);
+	if (!err) {
+		err = journal_begin(th, s, JOURNAL_PER_BALANCE_CNT * 6);
+		if (!err)
+			reiserfs_update_inode_transaction(inode);
+	}
+	return err;
+}
+
+// it is called by get_block when create == 0. Returns block number
+// for 'block'-th logical block of file. When it hits direct item it
+// returns 0 (being called from bmap) or read direct item into piece
+// of page (bh_result)
+
+// Please improve the english/clarity in the comment above, as it is
+// hard to understand.
+
+static int _get_block_create_0(struct inode *inode, sector_t block,
+			       struct buffer_head *bh_result, int args)
+{
+	INITIALIZE_PATH(path);
+	struct cpu_key key;
+	struct buffer_head *bh;
+	struct item_head *ih, tmp_ih;
+	int fs_gen;
+	b_blocknr_t blocknr;
+	char *p = NULL;
+	int chars;
+	int ret;
+	int result;
+	int done = 0;
+	unsigned long offset;
+
+	// prepare the key to look for the 'block'-th block of file
+	make_cpu_key(&key, inode,
+		     (loff_t) block * inode->i_sb->s_blocksize + 1, TYPE_ANY,
+		     3);
+
+      research:
+	result = search_for_position_by_key(inode->i_sb, &key, &path);
+	if (result != POSITION_FOUND) {
+		pathrelse(&path);
+		if (p)
+			kunmap(bh_result->b_page);
+		if (result == IO_ERROR)
+			return -EIO;
+		// We do not return -ENOENT if there is a hole but page is uptodate, because it means
+		// That there is some MMAPED data associated with it that is yet to be written to disk.
+		if ((args & GET_BLOCK_NO_HOLE)
+		    && !PageUptodate(bh_result->b_page)) {
+			return -ENOENT;
+		}
+		return 0;
+	}
+	//
+	bh = get_last_bh(&path);
+	ih = get_ih(&path);
+	if (is_indirect_le_ih(ih)) {
+		__le32 *ind_item = (__le32 *) B_I_PITEM(bh, ih);
+
+		/* FIXME: here we could cache indirect item or part of it in
+		   the inode to avoid search_by_key in case of subsequent
+		   access to file */
+		blocknr = get_block_num(ind_item, path.pos_in_item);
+		ret = 0;
+		if (blocknr) {
+			map_bh(bh_result, inode->i_sb, blocknr);
+			if (path.pos_in_item ==
+			    ((ih_item_len(ih) / UNFM_P_SIZE) - 1)) {
+				set_buffer_boundary(bh_result);
+			}
+		} else
+			// We do not return -ENOENT if there is a hole but page is uptodate, because it means
+			// That there is some MMAPED data associated with it that is yet to  be written to disk.
+		if ((args & GET_BLOCK_NO_HOLE)
+			    && !PageUptodate(bh_result->b_page)) {
+			ret = -ENOENT;
+		}
+
+		pathrelse(&path);
+		if (p)
+			kunmap(bh_result->b_page);
+		return ret;
+	}
+	// requested data are in direct item(s)
+	if (!(args & GET_BLOCK_READ_DIRECT)) {
+		// we are called by bmap. FIXME: we can not map block of file
+		// when it is stored in direct item(s)
+		pathrelse(&path);
+		if (p)
+			kunmap(bh_result->b_page);
+		return -ENOENT;
+	}
+
+	/* if we've got a direct item, and the buffer or page was uptodate,
+	 ** we don't want to pull data off disk again.  skip to the
+	 ** end, where we map the buffer and return
+	 */
+	if (buffer_uptodate(bh_result)) {
+		goto finished;
+	} else
+		/*
+		 ** grab_tail_page can trigger calls to reiserfs_get_block on up to date
+		 ** pages without any buffers.  If the page is up to date, we don't want
+		 ** read old data off disk.  Set the up to date bit on the buffer instead
+		 ** and jump to the end
+		 */
+	if (!bh_result->b_page || PageUptodate(bh_result->b_page)) {
+		set_buffer_uptodate(bh_result);
+		goto finished;
+	}
+	// read file tail into part of page
+	offset = (cpu_key_k_offset(&key) - 1) & (PAGE_CACHE_SIZE - 1);
+	fs_gen = get_generation(inode->i_sb);
+	copy_item_head(&tmp_ih, ih);
+
+	/* we only want to kmap if we are reading the tail into the page.
+	 ** this is not the common case, so we don't kmap until we are
+	 ** sure we need to.  But, this means the item might move if
+	 ** kmap schedules
+	 */
+	if (!p) {
+		p = (char *)kmap(bh_result->b_page);
+		if (fs_changed(fs_gen, inode->i_sb)
+		    && item_moved(&tmp_ih, &path)) {
+			goto research;
+		}
+	}
+	p += offset;
+	memset(p, 0, inode->i_sb->s_blocksize);
+	do {
+		if (!is_direct_le_ih(ih)) {
+			BUG();
+		}
+		/* make sure we don't read more bytes than actually exist in
+		 ** the file.  This can happen in odd cases where i_size isn't
+		 ** correct, and when direct item padding results in a few 
+		 ** extra bytes at the end of the direct item
+		 */
+		if ((le_ih_k_offset(ih) + path.pos_in_item) > inode->i_size)
+			break;
+		if ((le_ih_k_offset(ih) - 1 + ih_item_len(ih)) > inode->i_size) {
+			chars =
+			    inode->i_size - (le_ih_k_offset(ih) - 1) -
+			    path.pos_in_item;
+			done = 1;
+		} else {
+			chars = ih_item_len(ih) - path.pos_in_item;
+		}
+		memcpy(p, B_I_PITEM(bh, ih) + path.pos_in_item, chars);
+
+		if (done)
+			break;
+
+		p += chars;
+
+		if (PATH_LAST_POSITION(&path) != (B_NR_ITEMS(bh) - 1))
+			// we done, if read direct item is not the last item of
+			// node FIXME: we could try to check right delimiting key
+			// to see whether direct item continues in the right
+			// neighbor or rely on i_size
+			break;
+
+		// update key to look for the next piece
+		set_cpu_key_k_offset(&key, cpu_key_k_offset(&key) + chars);
+		result = search_for_position_by_key(inode->i_sb, &key, &path);
+		if (result != POSITION_FOUND)
+			// i/o error most likely
+			break;
+		bh = get_last_bh(&path);
+		ih = get_ih(&path);
+	} while (1);
+
+	flush_dcache_page(bh_result->b_page);
+	kunmap(bh_result->b_page);
+
+      finished:
+	pathrelse(&path);
+
+	if (result == IO_ERROR)
+		return -EIO;
+
+	/* this buffer has valid data, but isn't valid for io.  mapping it to
+	 * block #0 tells the rest of reiserfs it just has a tail in it
+	 */
+	map_bh(bh_result, inode->i_sb, 0);
+	set_buffer_uptodate(bh_result);
+	return 0;
+}
+
+// this is called to create file map. So, _get_block_create_0 will not
+// read direct item
+static int reiserfs_bmap(struct inode *inode, sector_t block,
+			 struct buffer_head *bh_result, int create)
+{
+	if (!file_capable(inode, block))
+		return -EFBIG;
+
+	reiserfs_write_lock(inode->i_sb);
+	/* do not read the direct item */
+	_get_block_create_0(inode, block, bh_result, 0);
+	reiserfs_write_unlock(inode->i_sb);
+	return 0;
+}
+
+/* special version of get_block that is only used by grab_tail_page right
+** now.  It is sent to block_prepare_write, and when you try to get a
+** block past the end of the file (or a block from a hole) it returns
+** -ENOENT instead of a valid buffer.  block_prepare_write expects to
+** be able to do i/o on the buffers returned, unless an error value
+** is also returned.
+** 
+** So, this allows block_prepare_write to be used for reading a single block
+** in a page.  Where it does not produce a valid page for holes, or past the
+** end of the file.  This turns out to be exactly what we need for reading
+** tails for conversion.
+**
+** The point of the wrapper is forcing a certain value for create, even
+** though the VFS layer is calling this function with create==1.  If you 
+** don't want to send create == GET_BLOCK_NO_HOLE to reiserfs_get_block, 
+** don't use this function.
+*/
+static int reiserfs_get_block_create_0(struct inode *inode, sector_t block,
+				       struct buffer_head *bh_result,
+				       int create)
+{
+	return reiserfs_get_block(inode, block, bh_result, GET_BLOCK_NO_HOLE);
+}
+
+/* This is special helper for reiserfs_get_block in case we are executing
+   direct_IO request. */
+static int reiserfs_get_blocks_direct_io(struct inode *inode,
+					 sector_t iblock,
+					 struct buffer_head *bh_result,
+					 int create)
+{
+	int ret;
+
+	bh_result->b_page = NULL;
+
+	/* We set the b_size before reiserfs_get_block call since it is
+	   referenced in convert_tail_for_hole() that may be called from
+	   reiserfs_get_block() */
+	bh_result->b_size = (1 << inode->i_blkbits);
+
+	ret = reiserfs_get_block(inode, iblock, bh_result,
+				 create | GET_BLOCK_NO_DANGLE);
+	if (ret)
+		goto out;
+
+	/* don't allow direct io onto tail pages */
+	if (buffer_mapped(bh_result) && bh_result->b_blocknr == 0) {
+		/* make sure future calls to the direct io funcs for this offset
+		 ** in the file fail by unmapping the buffer
+		 */
+		clear_buffer_mapped(bh_result);
+		ret = -EINVAL;
+	}
+	/* Possible unpacked tail. Flush the data before pages have
+	   disappeared */
+	if (REISERFS_I(inode)->i_flags & i_pack_on_close_mask) {
+		int err;
+		lock_kernel();
+		err = reiserfs_commit_for_inode(inode);
+		REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask;
+		unlock_kernel();
+		if (err < 0)
+			ret = err;
+	}
+      out:
+	return ret;
+}
+
+/*
+** helper function for when reiserfs_get_block is called for a hole
+** but the file tail is still in a direct item
+** bh_result is the buffer head for the hole
+** tail_offset is the offset of the start of the tail in the file
+**
+** This calls prepare_write, which will start a new transaction
+** you should not be in a transaction, or have any paths held when you
+** call this.
+*/
+static int convert_tail_for_hole(struct inode *inode,
+				 struct buffer_head *bh_result,
+				 loff_t tail_offset)
+{
+	unsigned long index;
+	unsigned long tail_end;
+	unsigned long tail_start;
+	struct page *tail_page;
+	struct page *hole_page = bh_result->b_page;
+	int retval = 0;
+
+	if ((tail_offset & (bh_result->b_size - 1)) != 1)
+		return -EIO;
+
+	/* always try to read until the end of the block */
+	tail_start = tail_offset & (PAGE_CACHE_SIZE - 1);
+	tail_end = (tail_start | (bh_result->b_size - 1)) + 1;
+
+	index = tail_offset >> PAGE_CACHE_SHIFT;
+	/* hole_page can be zero in case of direct_io, we are sure
+	   that we cannot get here if we write with O_DIRECT into
+	   tail page */
+	if (!hole_page || index != hole_page->index) {
+		tail_page = grab_cache_page(inode->i_mapping, index);
+		retval = -ENOMEM;
+		if (!tail_page) {
+			goto out;
+		}
+	} else {
+		tail_page = hole_page;
+	}
+
+	/* we don't have to make sure the conversion did not happen while
+	 ** we were locking the page because anyone that could convert
+	 ** must first take i_mutex.
+	 **
+	 ** We must fix the tail page for writing because it might have buffers
+	 ** that are mapped, but have a block number of 0.  This indicates tail
+	 ** data that has been read directly into the page, and block_prepare_write
+	 ** won't trigger a get_block in this case.
+	 */
+	fix_tail_page_for_writing(tail_page);
+	retval = reiserfs_prepare_write(NULL, tail_page, tail_start, tail_end);
+	if (retval)
+		goto unlock;
+
+	/* tail conversion might change the data in the page */
+	flush_dcache_page(tail_page);
+
+	retval = reiserfs_commit_write(NULL, tail_page, tail_start, tail_end);
+
+      unlock:
+	if (tail_page != hole_page) {
+		unlock_page(tail_page);
+		page_cache_release(tail_page);
+	}
+      out:
+	return retval;
+}
+
+static inline int _allocate_block(struct reiserfs_transaction_handle *th,
+				  sector_t block,
+				  struct inode *inode,
+				  b_blocknr_t * allocated_block_nr,
+				  struct treepath *path, int flags)
+{
+	BUG_ON(!th->t_trans_id);
+
+#ifdef REISERFS_PREALLOCATE
+	if (!(flags & GET_BLOCK_NO_IMUX)) {
+		return reiserfs_new_unf_blocknrs2(th, inode, allocated_block_nr,
+						  path, block);
+	}
+#endif
+	return reiserfs_new_unf_blocknrs(th, inode, allocated_block_nr, path,
+					 block);
+}
+
+int reiserfs_get_block(struct inode *inode, sector_t block,
+		       struct buffer_head *bh_result, int create)
+{
+	int repeat, retval = 0;
+	b_blocknr_t allocated_block_nr = 0;	// b_blocknr_t is (unsigned) 32 bit int
+	INITIALIZE_PATH(path);
+	int pos_in_item;
+	struct cpu_key key;
+	struct buffer_head *bh, *unbh = NULL;
+	struct item_head *ih, tmp_ih;
+	__le32 *item;
+	int done;
+	int fs_gen;
+	struct reiserfs_transaction_handle *th = NULL;
+	/* space reserved in transaction batch: 
+	   . 3 balancings in direct->indirect conversion
+	   . 1 block involved into reiserfs_update_sd()
+	   XXX in practically impossible worst case direct2indirect()
+	   can incur (much) more than 3 balancings.
+	   quota update for user, group */
+	int jbegin_count =
+	    JOURNAL_PER_BALANCE_CNT * 3 + 1 +
+	    2 * REISERFS_QUOTA_TRANS_BLOCKS(inode->i_sb);
+	int version;
+	int dangle = 1;
+	loff_t new_offset =
+	    (((loff_t) block) << inode->i_sb->s_blocksize_bits) + 1;
+
+	/* bad.... */
+	reiserfs_write_lock(inode->i_sb);
+	version = get_inode_item_key_version(inode);
+
+	if (!file_capable(inode, block)) {
+		reiserfs_write_unlock(inode->i_sb);
+		return -EFBIG;
+	}
+
+	/* if !create, we aren't changing the FS, so we don't need to
+	 ** log anything, so we don't need to start a transaction
+	 */
+	if (!(create & GET_BLOCK_CREATE)) {
+		int ret;
+		/* find number of block-th logical block of the file */
+		ret = _get_block_create_0(inode, block, bh_result,
+					  create | GET_BLOCK_READ_DIRECT);
+		reiserfs_write_unlock(inode->i_sb);
+		return ret;
+	}
+	/*
+	 * if we're already in a transaction, make sure to close
+	 * any new transactions we start in this func
+	 */
+	if ((create & GET_BLOCK_NO_DANGLE) ||
+	    reiserfs_transaction_running(inode->i_sb))
+		dangle = 0;
+
+	/* If file is of such a size, that it might have a tail and tails are enabled
+	 ** we should mark it as possibly needing tail packing on close
+	 */
+	if ((have_large_tails(inode->i_sb)
+	     && inode->i_size < i_block_size(inode) * 4)
+	    || (have_small_tails(inode->i_sb)
+		&& inode->i_size < i_block_size(inode)))
+		REISERFS_I(inode)->i_flags |= i_pack_on_close_mask;
+
+	/* set the key of the first byte in the 'block'-th block of file */
+	make_cpu_key(&key, inode, new_offset, TYPE_ANY, 3 /*key length */ );
+	if ((new_offset + inode->i_sb->s_blocksize - 1) > inode->i_size) {
+	      start_trans:
+		th = reiserfs_persistent_transaction(inode->i_sb, jbegin_count);
+		if (!th) {
+			retval = -ENOMEM;
+			goto failure;
+		}
+		reiserfs_update_inode_transaction(inode);
+	}
+      research:
+
+	retval = search_for_position_by_key(inode->i_sb, &key, &path);
+	if (retval == IO_ERROR) {
+		retval = -EIO;
+		goto failure;
+	}
+
+	bh = get_last_bh(&path);
+	ih = get_ih(&path);
+	item = get_item(&path);
+	pos_in_item = path.pos_in_item;
+
+	fs_gen = get_generation(inode->i_sb);
+	copy_item_head(&tmp_ih, ih);
+
+	if (allocation_needed
+	    (retval, allocated_block_nr, ih, item, pos_in_item)) {
+		/* we have to allocate block for the unformatted node */
+		if (!th) {
+			pathrelse(&path);
+			goto start_trans;
+		}
+
+		repeat =
+		    _allocate_block(th, block, inode, &allocated_block_nr,
+				    &path, create);
+
+		if (repeat == NO_DISK_SPACE || repeat == QUOTA_EXCEEDED) {
+			/* restart the transaction to give the journal a chance to free
+			 ** some blocks.  releases the path, so we have to go back to
+			 ** research if we succeed on the second try
+			 */
+			SB_JOURNAL(inode->i_sb)->j_next_async_flush = 1;
+			retval = restart_transaction(th, inode, &path);
+			if (retval)
+				goto failure;
+			repeat =
+			    _allocate_block(th, block, inode,
+					    &allocated_block_nr, NULL, create);
+
+			if (repeat != NO_DISK_SPACE && repeat != QUOTA_EXCEEDED) {
+				goto research;
+			}
+			if (repeat == QUOTA_EXCEEDED)
+				retval = -EDQUOT;
+			else
+				retval = -ENOSPC;
+			goto failure;
+		}
+
+		if (fs_changed(fs_gen, inode->i_sb)
+		    && item_moved(&tmp_ih, &path)) {
+			goto research;
+		}
+	}
+
+	if (indirect_item_found(retval, ih)) {
+		b_blocknr_t unfm_ptr;
+		/* 'block'-th block is in the file already (there is
+		   corresponding cell in some indirect item). But it may be
+		   zero unformatted node pointer (hole) */
+		unfm_ptr = get_block_num(item, pos_in_item);
+		if (unfm_ptr == 0) {
+			/* use allocated block to plug the hole */
+			reiserfs_prepare_for_journal(inode->i_sb, bh, 1);
+			if (fs_changed(fs_gen, inode->i_sb)
+			    && item_moved(&tmp_ih, &path)) {
+				reiserfs_restore_prepared_buffer(inode->i_sb,
+								 bh);
+				goto research;
+			}
+			set_buffer_new(bh_result);
+			if (buffer_dirty(bh_result)
+			    && reiserfs_data_ordered(inode->i_sb))
+				reiserfs_add_ordered_list(inode, bh_result);
+			put_block_num(item, pos_in_item, allocated_block_nr);
+			unfm_ptr = allocated_block_nr;
+			journal_mark_dirty(th, inode->i_sb, bh);
+			reiserfs_update_sd(th, inode);
+		}
+		set_block_dev_mapped(bh_result, unfm_ptr, inode);
+		pathrelse(&path);
+		retval = 0;
+		if (!dangle && th)
+			retval = reiserfs_end_persistent_transaction(th);
+
+		reiserfs_write_unlock(inode->i_sb);
+
+		/* the item was found, so new blocks were not added to the file
+		 ** there is no need to make sure the inode is updated with this 
+		 ** transaction
+		 */
+		return retval;
+	}
+
+	if (!th) {
+		pathrelse(&path);
+		goto start_trans;
+	}
+
+	/* desired position is not found or is in the direct item. We have
+	   to append file with holes up to 'block'-th block converting
+	   direct items to indirect one if necessary */
+	done = 0;
+	do {
+		if (is_statdata_le_ih(ih)) {
+			__le32 unp = 0;
+			struct cpu_key tmp_key;
+
+			/* indirect item has to be inserted */
+			make_le_item_head(&tmp_ih, &key, version, 1,
+					  TYPE_INDIRECT, UNFM_P_SIZE,
+					  0 /* free_space */ );
+
+			if (cpu_key_k_offset(&key) == 1) {
+				/* we are going to add 'block'-th block to the file. Use
+				   allocated block for that */
+				unp = cpu_to_le32(allocated_block_nr);
+				set_block_dev_mapped(bh_result,
+						     allocated_block_nr, inode);
+				set_buffer_new(bh_result);
+				done = 1;
+			}
+			tmp_key = key;	// ;)
+			set_cpu_key_k_offset(&tmp_key, 1);
+			PATH_LAST_POSITION(&path)++;
+
+			retval =
+			    reiserfs_insert_item(th, &path, &tmp_key, &tmp_ih,
+						 inode, (char *)&unp);
+			if (retval) {
+				reiserfs_free_block(th, inode,
+						    allocated_block_nr, 1);
+				goto failure;	// retval == -ENOSPC, -EDQUOT or -EIO or -EEXIST
+			}
+			//mark_tail_converted (inode);
+		} else if (is_direct_le_ih(ih)) {
+			/* direct item has to be converted */
+			loff_t tail_offset;
+
+			tail_offset =
+			    ((le_ih_k_offset(ih) -
+			      1) & ~(inode->i_sb->s_blocksize - 1)) + 1;
+			if (tail_offset == cpu_key_k_offset(&key)) {
+				/* direct item we just found fits into block we have
+				   to map. Convert it into unformatted node: use
+				   bh_result for the conversion */
+				set_block_dev_mapped(bh_result,
+						     allocated_block_nr, inode);
+				unbh = bh_result;
+				done = 1;
+			} else {
+				/* we have to padd file tail stored in direct item(s)
+				   up to block size and convert it to unformatted
+				   node. FIXME: this should also get into page cache */
+
+				pathrelse(&path);
+				/*
+				 * ugly, but we can only end the transaction if
+				 * we aren't nested
+				 */
+				BUG_ON(!th->t_refcount);
+				if (th->t_refcount == 1) {
+					retval =
+					    reiserfs_end_persistent_transaction
+					    (th);
+					th = NULL;
+					if (retval)
+						goto failure;
+				}
+
+				retval =
+				    convert_tail_for_hole(inode, bh_result,
+							  tail_offset);
+				if (retval) {
+					if (retval != -ENOSPC)
+						reiserfs_warning(inode->i_sb,
+								 "clm-6004: convert tail failed inode %lu, error %d",
+								 inode->i_ino,
+								 retval);
+					if (allocated_block_nr) {
+						/* the bitmap, the super, and the stat data == 3 */
+						if (!th)
+							th = reiserfs_persistent_transaction(inode->i_sb, 3);
+						if (th)
+							reiserfs_free_block(th,
+									    inode,
+									    allocated_block_nr,
+									    1);
+					}
+					goto failure;
+				}
+				goto research;
+			}
+			retval =
+			    direct2indirect(th, inode, &path, unbh,
+					    tail_offset);
+			if (retval) {
+				reiserfs_unmap_buffer(unbh);
+				reiserfs_free_block(th, inode,
+						    allocated_block_nr, 1);
+				goto failure;
+			}
+			/* it is important the set_buffer_uptodate is done after
+			 ** the direct2indirect.  The buffer might contain valid
+			 ** data newer than the data on disk (read by readpage, changed,
+			 ** and then sent here by writepage).  direct2indirect needs
+			 ** to know if unbh was already up to date, so it can decide
+			 ** if the data in unbh needs to be replaced with data from
+			 ** the disk
+			 */
+			set_buffer_uptodate(unbh);
+
+			/* unbh->b_page == NULL in case of DIRECT_IO request, this means
+			   buffer will disappear shortly, so it should not be added to
+			 */
+			if (unbh->b_page) {
+				/* we've converted the tail, so we must
+				 ** flush unbh before the transaction commits
+				 */
+				reiserfs_add_tail_list(inode, unbh);
+
+				/* mark it dirty now to prevent commit_write from adding
+				 ** this buffer to the inode's dirty buffer list
+				 */
+				/*
+				 * AKPM: changed __mark_buffer_dirty to mark_buffer_dirty().
+				 * It's still atomic, but it sets the page dirty too,
+				 * which makes it eligible for writeback at any time by the
+				 * VM (which was also the case with __mark_buffer_dirty())
+				 */
+				mark_buffer_dirty(unbh);
+			}
+		} else {
+			/* append indirect item with holes if needed, when appending
+			   pointer to 'block'-th block use block, which is already
+			   allocated */
+			struct cpu_key tmp_key;
+			unp_t unf_single = 0;	// We use this in case we need to allocate only
+			// one block which is a fastpath
+			unp_t *un;
+			__u64 max_to_insert =
+			    MAX_ITEM_LEN(inode->i_sb->s_blocksize) /
+			    UNFM_P_SIZE;
+			__u64 blocks_needed;
+
+			RFALSE(pos_in_item != ih_item_len(ih) / UNFM_P_SIZE,
+			       "vs-804: invalid position for append");
+			/* indirect item has to be appended, set up key of that position */
+			make_cpu_key(&tmp_key, inode,
+				     le_key_k_offset(version,
+						     &(ih->ih_key)) +
+				     op_bytes_number(ih,
+						     inode->i_sb->s_blocksize),
+				     //pos_in_item * inode->i_sb->s_blocksize,
+				     TYPE_INDIRECT, 3);	// key type is unimportant
+
+			RFALSE(cpu_key_k_offset(&tmp_key) > cpu_key_k_offset(&key),
+			       "green-805: invalid offset");
+			blocks_needed =
+			    1 +
+			    ((cpu_key_k_offset(&key) -
+			      cpu_key_k_offset(&tmp_key)) >> inode->i_sb->
+			     s_blocksize_bits);
+
+			if (blocks_needed == 1) {
+				un = &unf_single;
+			} else {
+				un = kzalloc(min(blocks_needed, max_to_insert) * UNFM_P_SIZE, GFP_ATOMIC);	// We need to avoid scheduling.
+				if (!un) {
+					un = &unf_single;
+					blocks_needed = 1;
+					max_to_insert = 0;
+				}
+			}
+			if (blocks_needed <= max_to_insert) {
+				/* we are going to add target block to the file. Use allocated
+				   block for that */
+				un[blocks_needed - 1] =
+				    cpu_to_le32(allocated_block_nr);
+				set_block_dev_mapped(bh_result,
+						     allocated_block_nr, inode);
+				set_buffer_new(bh_result);
+				done = 1;
+			} else {
+				/* paste hole to the indirect item */
+				/* If kmalloc failed, max_to_insert becomes zero and it means we
+				   only have space for one block */
+				blocks_needed =
+				    max_to_insert ? max_to_insert : 1;
+			}
+			retval =
+			    reiserfs_paste_into_item(th, &path, &tmp_key, inode,
+						     (char *)un,
+						     UNFM_P_SIZE *
+						     blocks_needed);
+
+			if (blocks_needed != 1)
+				kfree(un);
+
+			if (retval) {
+				reiserfs_free_block(th, inode,
+						    allocated_block_nr, 1);
+				goto failure;
+			}
+			if (!done) {
+				/* We need to mark new file size in case this function will be
+				   interrupted/aborted later on. And we may do this only for
+				   holes. */
+				inode->i_size +=
+				    inode->i_sb->s_blocksize * blocks_needed;
+			}
+		}
+
+		if (done == 1)
+			break;
+
+		/* this loop could log more blocks than we had originally asked
+		 ** for.  So, we have to allow the transaction to end if it is
+		 ** too big or too full.  Update the inode so things are 
+		 ** consistent if we crash before the function returns
+		 **
+		 ** release the path so that anybody waiting on the path before
+		 ** ending their transaction will be able to continue.
+		 */
+		if (journal_transaction_should_end(th, th->t_blocks_allocated)) {
+			retval = restart_transaction(th, inode, &path);
+			if (retval)
+				goto failure;
+		}
+		/* inserting indirect pointers for a hole can take a 
+		 ** long time.  reschedule if needed
+		 */
+		cond_resched();
+
+		retval = search_for_position_by_key(inode->i_sb, &key, &path);
+		if (retval == IO_ERROR) {
+			retval = -EIO;
+			goto failure;
+		}
+		if (retval == POSITION_FOUND) {
+			reiserfs_warning(inode->i_sb,
+					 "vs-825: reiserfs_get_block: "
+					 "%K should not be found", &key);
+			retval = -EEXIST;
+			if (allocated_block_nr)
+				reiserfs_free_block(th, inode,
+						    allocated_block_nr, 1);
+			pathrelse(&path);
+			goto failure;
+		}
+		bh = get_last_bh(&path);
+		ih = get_ih(&path);
+		item = get_item(&path);
+		pos_in_item = path.pos_in_item;
+	} while (1);
+
+	retval = 0;
+
+      failure:
+	if (th && (!dangle || (retval && !th->t_trans_id))) {
+		int err;
+		if (th->t_trans_id)
+			reiserfs_update_sd(th, inode);
+		err = reiserfs_end_persistent_transaction(th);
+		if (err)
+			retval = err;
+	}
+
+	reiserfs_write_unlock(inode->i_sb);
+	reiserfs_check_path(&path);
+	return retval;
+}
+
+static int
+reiserfs_readpages(struct file *file, struct address_space *mapping,
+		   struct list_head *pages, unsigned nr_pages)
+{
+	return mpage_readpages(mapping, pages, nr_pages, reiserfs_get_block);
+}
+
+/* Compute real number of used bytes by file
+ * Following three functions can go away when we'll have enough space in stat item
+ */
+static int real_space_diff(struct inode *inode, int sd_size)
+{
+	int bytes;
+	loff_t blocksize = inode->i_sb->s_blocksize;
+
+	if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode))
+		return sd_size;
+
+	/* End of file is also in full block with indirect reference, so round
+	 ** up to the next block.
+	 **
+	 ** there is just no way to know if the tail is actually packed
+	 ** on the file, so we have to assume it isn't.  When we pack the
+	 ** tail, we add 4 bytes to pretend there really is an unformatted
+	 ** node pointer
+	 */
+	bytes =
+	    ((inode->i_size +
+	      (blocksize - 1)) >> inode->i_sb->s_blocksize_bits) * UNFM_P_SIZE +
+	    sd_size;
+	return bytes;
+}
+
+static inline loff_t to_real_used_space(struct inode *inode, ulong blocks,
+					int sd_size)
+{
+	if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode)) {
+		return inode->i_size +
+		    (loff_t) (real_space_diff(inode, sd_size));
+	}
+	return ((loff_t) real_space_diff(inode, sd_size)) +
+	    (((loff_t) blocks) << 9);
+}
+
+/* Compute number of blocks used by file in ReiserFS counting */
+static inline ulong to_fake_used_blocks(struct inode *inode, int sd_size)
+{
+	loff_t bytes = inode_get_bytes(inode);
+	loff_t real_space = real_space_diff(inode, sd_size);
+
+	/* keeps fsck and non-quota versions of reiserfs happy */
+	if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode)) {
+		bytes += (loff_t) 511;
+	}
+
+	/* files from before the quota patch might i_blocks such that
+	 ** bytes < real_space.  Deal with that here to prevent it from
+	 ** going negative.
+	 */
+	if (bytes < real_space)
+		return 0;
+	return (bytes - real_space) >> 9;
+}
+
+//
+// BAD: new directories have stat data of new type and all other items
+// of old type. Version stored in the inode says about body items, so
+// in update_stat_data we can not rely on inode, but have to check
+// item version directly
+//
+
+// called by read_locked_inode
+static void init_inode(struct inode *inode, struct treepath *path)
+{
+	struct buffer_head *bh;
+	struct item_head *ih;
+	__u32 rdev;
+	//int version = ITEM_VERSION_1;
+
+	bh = PATH_PLAST_BUFFER(path);
+	ih = PATH_PITEM_HEAD(path);
+
+	copy_key(INODE_PKEY(inode), &(ih->ih_key));
+
+	INIT_LIST_HEAD(&(REISERFS_I(inode)->i_prealloc_list));
+	REISERFS_I(inode)->i_flags = 0;
+	REISERFS_I(inode)->i_prealloc_block = 0;
+	REISERFS_I(inode)->i_prealloc_count = 0;
+	REISERFS_I(inode)->i_trans_id = 0;
+	REISERFS_I(inode)->i_jl = NULL;
+	mutex_init(&(REISERFS_I(inode)->i_mmap));
+	reiserfs_init_acl_access(inode);
+	reiserfs_init_acl_default(inode);
+	reiserfs_init_xattr_rwsem(inode);
+
+	if (stat_data_v1(ih)) {
+		struct stat_data_v1 *sd =
+		    (struct stat_data_v1 *)B_I_PITEM(bh, ih);
+		unsigned long blocks;
+
+		set_inode_item_key_version(inode, KEY_FORMAT_3_5);
+		set_inode_sd_version(inode, STAT_DATA_V1);
+		inode->i_mode = sd_v1_mode(sd);
+		inode->i_nlink = sd_v1_nlink(sd);
+		inode->i_uid = sd_v1_uid(sd);
+		inode->i_gid = sd_v1_gid(sd);
+		inode->i_size = sd_v1_size(sd);
+		inode->i_atime.tv_sec = sd_v1_atime(sd);
+		inode->i_mtime.tv_sec = sd_v1_mtime(sd);
+		inode->i_ctime.tv_sec = sd_v1_ctime(sd);
+		inode->i_atime.tv_nsec = 0;
+		inode->i_ctime.tv_nsec = 0;
+		inode->i_mtime.tv_nsec = 0;
+
+		inode->i_blocks = sd_v1_blocks(sd);
+		inode->i_generation = le32_to_cpu(INODE_PKEY(inode)->k_dir_id);
+		blocks = (inode->i_size + 511) >> 9;
+		blocks = _ROUND_UP(blocks, inode->i_sb->s_blocksize >> 9);
+		if (inode->i_blocks > blocks) {
+			// there was a bug in <=3.5.23 when i_blocks could take negative
+			// values. Starting from 3.5.17 this value could even be stored in
+			// stat data. For such files we set i_blocks based on file
+			// size. Just 2 notes: this can be wrong for sparce files. On-disk value will be
+			// only updated if file's inode will ever change
+			inode->i_blocks = blocks;
+		}
+
+		rdev = sd_v1_rdev(sd);
+		REISERFS_I(inode)->i_first_direct_byte =
+		    sd_v1_first_direct_byte(sd);
+		/* an early bug in the quota code can give us an odd number for the
+		 ** block count.  This is incorrect, fix it here.
+		 */
+		if (inode->i_blocks & 1) {
+			inode->i_blocks++;
+		}
+		inode_set_bytes(inode,
+				to_real_used_space(inode, inode->i_blocks,
+						   SD_V1_SIZE));
+		/* nopack is initially zero for v1 objects. For v2 objects,
+		   nopack is initialised from sd_attrs */
+		REISERFS_I(inode)->i_flags &= ~i_nopack_mask;
+	} else {
+		// new stat data found, but object may have old items
+		// (directories and symlinks)
+		struct stat_data *sd = (struct stat_data *)B_I_PITEM(bh, ih);
+
+		inode->i_mode = sd_v2_mode(sd);
+		inode->i_nlink = sd_v2_nlink(sd);
+		inode->i_uid = sd_v2_uid(sd);
+		inode->i_size = sd_v2_size(sd);
+		inode->i_gid = sd_v2_gid(sd);
+		inode->i_mtime.tv_sec = sd_v2_mtime(sd);
+		inode->i_atime.tv_sec = sd_v2_atime(sd);
+		inode->i_ctime.tv_sec = sd_v2_ctime(sd);
+		inode->i_ctime.tv_nsec = 0;
+		inode->i_mtime.tv_nsec = 0;
+		inode->i_atime.tv_nsec = 0;
+		inode->i_blocks = sd_v2_blocks(sd);
+		rdev = sd_v2_rdev(sd);
+		if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
+			inode->i_generation =
+			    le32_to_cpu(INODE_PKEY(inode)->k_dir_id);
+		else
+			inode->i_generation = sd_v2_generation(sd);
+
+		if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
+			set_inode_item_key_version(inode, KEY_FORMAT_3_5);
+		else
+			set_inode_item_key_version(inode, KEY_FORMAT_3_6);
+		REISERFS_I(inode)->i_first_direct_byte = 0;
+		set_inode_sd_version(inode, STAT_DATA_V2);
+		inode_set_bytes(inode,
+				to_real_used_space(inode, inode->i_blocks,
+						   SD_V2_SIZE));
+		/* read persistent inode attributes from sd and initalise
+		   generic inode flags from them */
+		REISERFS_I(inode)->i_attrs = sd_v2_attrs(sd);
+		sd_attrs_to_i_attrs(sd_v2_attrs(sd), inode);
+	}
+
+	pathrelse(path);
+	if (S_ISREG(inode->i_mode)) {
+		inode->i_op = &reiserfs_file_inode_operations;
+		inode->i_fop = &reiserfs_file_operations;
+		inode->i_mapping->a_ops = &reiserfs_address_space_operations;
+	} else if (S_ISDIR(inode->i_mode)) {
+		inode->i_op = &reiserfs_dir_inode_operations;
+		inode->i_fop = &reiserfs_dir_operations;
+	} else if (S_ISLNK(inode->i_mode)) {
+		inode->i_op = &reiserfs_symlink_inode_operations;
+		inode->i_mapping->a_ops = &reiserfs_address_space_operations;
+	} else {
+		inode->i_blocks = 0;
+		inode->i_op = &reiserfs_special_inode_operations;
+		init_special_inode(inode, inode->i_mode, new_decode_dev(rdev));
+	}
+}
+
+// update new stat data with inode fields
+static void inode2sd(void *sd, struct inode *inode, loff_t size)
+{
+	struct stat_data *sd_v2 = (struct stat_data *)sd;
+	__u16 flags;
+
+	set_sd_v2_mode(sd_v2, inode->i_mode);
+	set_sd_v2_nlink(sd_v2, inode->i_nlink);
+	set_sd_v2_uid(sd_v2, inode->i_uid);
+	set_sd_v2_size(sd_v2, size);
+	set_sd_v2_gid(sd_v2, inode->i_gid);
+	set_sd_v2_mtime(sd_v2, inode->i_mtime.tv_sec);
+	set_sd_v2_atime(sd_v2, inode->i_atime.tv_sec);
+	set_sd_v2_ctime(sd_v2, inode->i_ctime.tv_sec);
+	set_sd_v2_blocks(sd_v2, to_fake_used_blocks(inode, SD_V2_SIZE));
+	if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
+		set_sd_v2_rdev(sd_v2, new_encode_dev(inode->i_rdev));
+	else
+		set_sd_v2_generation(sd_v2, inode->i_generation);
+	flags = REISERFS_I(inode)->i_attrs;
+	i_attrs_to_sd_attrs(inode, &flags);
+	set_sd_v2_attrs(sd_v2, flags);
+}
+
+// used to copy inode's fields to old stat data
+static void inode2sd_v1(void *sd, struct inode *inode, loff_t size)
+{
+	struct stat_data_v1 *sd_v1 = (struct stat_data_v1 *)sd;
+
+	set_sd_v1_mode(sd_v1, inode->i_mode);
+	set_sd_v1_uid(sd_v1, inode->i_uid);
+	set_sd_v1_gid(sd_v1, inode->i_gid);
+	set_sd_v1_nlink(sd_v1, inode->i_nlink);
+	set_sd_v1_size(sd_v1, size);
+	set_sd_v1_atime(sd_v1, inode->i_atime.tv_sec);
+	set_sd_v1_ctime(sd_v1, inode->i_ctime.tv_sec);
+	set_sd_v1_mtime(sd_v1, inode->i_mtime.tv_sec);
+
+	if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
+		set_sd_v1_rdev(sd_v1, new_encode_dev(inode->i_rdev));
+	else
+		set_sd_v1_blocks(sd_v1, to_fake_used_blocks(inode, SD_V1_SIZE));
+
+	// Sigh. i_first_direct_byte is back
+	set_sd_v1_first_direct_byte(sd_v1,
+				    REISERFS_I(inode)->i_first_direct_byte);
+}
+
+/* NOTE, you must prepare the buffer head before sending it here,
+** and then log it after the call
+*/
+static void update_stat_data(struct treepath *path, struct inode *inode,
+			     loff_t size)
+{
+	struct buffer_head *bh;
+	struct item_head *ih;
+
+	bh = PATH_PLAST_BUFFER(path);
+	ih = PATH_PITEM_HEAD(path);
+
+	if (!is_statdata_le_ih(ih))
+		reiserfs_panic(inode->i_sb,
+			       "vs-13065: update_stat_data: key %k, found item %h",
+			       INODE_PKEY(inode), ih);
+
+	if (stat_data_v1(ih)) {
+		// path points to old stat data
+		inode2sd_v1(B_I_PITEM(bh, ih), inode, size);
+	} else {
+		inode2sd(B_I_PITEM(bh, ih), inode, size);
+	}
+
+	return;
+}
+
+void reiserfs_update_sd_size(struct reiserfs_transaction_handle *th,
+			     struct inode *inode, loff_t size)
+{
+	struct cpu_key key;
+	INITIALIZE_PATH(path);
+	struct buffer_head *bh;
+	int fs_gen;
+	struct item_head *ih, tmp_ih;
+	int retval;
+
+	BUG_ON(!th->t_trans_id);
+
+	make_cpu_key(&key, inode, SD_OFFSET, TYPE_STAT_DATA, 3);	//key type is unimportant
+
+	for (;;) {
+		int pos;
+		/* look for the object's stat data */
+		retval = search_item(inode->i_sb, &key, &path);
+		if (retval == IO_ERROR) {
+			reiserfs_warning(inode->i_sb,
+					 "vs-13050: reiserfs_update_sd: "
+					 "i/o failure occurred trying to update %K stat data",
+					 &key);
+			return;
+		}
+		if (retval == ITEM_NOT_FOUND) {
+			pos = PATH_LAST_POSITION(&path);
+			pathrelse(&path);
+			if (inode->i_nlink == 0) {
+				/*reiserfs_warning (inode->i_sb, "vs-13050: reiserfs_update_sd: i_nlink == 0, stat data not found"); */
+				return;
+			}
+			reiserfs_warning(inode->i_sb,
+					 "vs-13060: reiserfs_update_sd: "
+					 "stat data of object %k (nlink == %d) not found (pos %d)",
+					 INODE_PKEY(inode), inode->i_nlink,
+					 pos);
+			reiserfs_check_path(&path);
+			return;
+		}
+
+		/* sigh, prepare_for_journal might schedule.  When it schedules the
+		 ** FS might change.  We have to detect that, and loop back to the
+		 ** search if the stat data item has moved
+		 */
+		bh = get_last_bh(&path);
+		ih = get_ih(&path);
+		copy_item_head(&tmp_ih, ih);
+		fs_gen = get_generation(inode->i_sb);
+		reiserfs_prepare_for_journal(inode->i_sb, bh, 1);
+		if (fs_changed(fs_gen, inode->i_sb)
+		    && item_moved(&tmp_ih, &path)) {
+			reiserfs_restore_prepared_buffer(inode->i_sb, bh);
+			continue;	/* Stat_data item has been moved after scheduling. */
+		}
+		break;
+	}
+	update_stat_data(&path, inode, size);
+	journal_mark_dirty(th, th->t_super, bh);
+	pathrelse(&path);
+	return;
+}
+
+/* reiserfs_read_locked_inode is called to read the inode off disk, and it
+** does a make_bad_inode when things go wrong.  But, we need to make sure
+** and clear the key in the private portion of the inode, otherwise a
+** corresponding iput might try to delete whatever object the inode last
+** represented.
+*/
+static void reiserfs_make_bad_inode(struct inode *inode)
+{
+	memset(INODE_PKEY(inode), 0, KEY_SIZE);
+	make_bad_inode(inode);
+}
+
+//
+// initially this function was derived from minix or ext2's analog and
+// evolved as the prototype did
+//
+
+int reiserfs_init_locked_inode(struct inode *inode, void *p)
+{
+	struct reiserfs_iget_args *args = (struct reiserfs_iget_args *)p;
+	inode->i_ino = args->objectid;
+	INODE_PKEY(inode)->k_dir_id = cpu_to_le32(args->dirid);
+	return 0;
+}
+
+/* looks for stat data in the tree, and fills up the fields of in-core
+   inode stat data fields */
+void reiserfs_read_locked_inode(struct inode *inode,
+				struct reiserfs_iget_args *args)
+{
+	INITIALIZE_PATH(path_to_sd);
+	struct cpu_key key;
+	unsigned long dirino;
+	int retval;
+
+	dirino = args->dirid;
+
+	/* set version 1, version 2 could be used too, because stat data
+	   key is the same in both versions */
+	key.version = KEY_FORMAT_3_5;
+	key.on_disk_key.k_dir_id = dirino;
+	key.on_disk_key.k_objectid = inode->i_ino;
+	key.on_disk_key.k_offset = 0;
+	key.on_disk_key.k_type = 0;
+
+	/* look for the object's stat data */
+	retval = search_item(inode->i_sb, &key, &path_to_sd);
+	if (retval == IO_ERROR) {
+		reiserfs_warning(inode->i_sb,
+				 "vs-13070: reiserfs_read_locked_inode: "
+				 "i/o failure occurred trying to find stat data of %K",
+				 &key);
+		reiserfs_make_bad_inode(inode);
+		return;
+	}
+	if (retval != ITEM_FOUND) {
+		/* a stale NFS handle can trigger this without it being an error */
+		pathrelse(&path_to_sd);
+		reiserfs_make_bad_inode(inode);
+		inode->i_nlink = 0;
+		return;
+	}
+
+	init_inode(inode, &path_to_sd);
+
+	/* It is possible that knfsd is trying to access inode of a file
+	   that is being removed from the disk by some other thread. As we
+	   update sd on unlink all that is required is to check for nlink
+	   here. This bug was first found by Sizif when debugging
+	   SquidNG/Butterfly, forgotten, and found again after Philippe
+	   Gramoulle <philippe.gramoulle@mmania.com> reproduced it. 
+
+	   More logical fix would require changes in fs/inode.c:iput() to
+	   remove inode from hash-table _after_ fs cleaned disk stuff up and
+	   in iget() to return NULL if I_FREEING inode is found in
+	   hash-table. */
+	/* Currently there is one place where it's ok to meet inode with
+	   nlink==0: processing of open-unlinked and half-truncated files
+	   during mount (fs/reiserfs/super.c:finish_unfinished()). */
+	if ((inode->i_nlink == 0) &&
+	    !REISERFS_SB(inode->i_sb)->s_is_unlinked_ok) {
+		reiserfs_warning(inode->i_sb,
+				 "vs-13075: reiserfs_read_locked_inode: "
+				 "dead inode read from disk %K. "
+				 "This is likely to be race with knfsd. Ignore",
+				 &key);
+		reiserfs_make_bad_inode(inode);
+	}
+
+	reiserfs_check_path(&path_to_sd);	/* init inode should be relsing */
+
+}
+
+/**
+ * reiserfs_find_actor() - "find actor" reiserfs supplies to iget5_locked().
+ *
+ * @inode:    inode from hash table to check
+ * @opaque:   "cookie" passed to iget5_locked(). This is &reiserfs_iget_args.
+ *
+ * This function is called by iget5_locked() to distinguish reiserfs inodes
+ * having the same inode numbers. Such inodes can only exist due to some
+ * error condition. One of them should be bad. Inodes with identical
+ * inode numbers (objectids) are distinguished by parent directory ids.
+ *
+ */
+int reiserfs_find_actor(struct inode *inode, void *opaque)
+{
+	struct reiserfs_iget_args *args;
+
+	args = opaque;
+	/* args is already in CPU order */
+	return (inode->i_ino == args->objectid) &&
+	    (le32_to_cpu(INODE_PKEY(inode)->k_dir_id) == args->dirid);
+}
+
+struct inode *reiserfs_iget(struct super_block *s, const struct cpu_key *key)
+{
+	struct inode *inode;
+	struct reiserfs_iget_args args;
+
+	args.objectid = key->on_disk_key.k_objectid;
+	args.dirid = key->on_disk_key.k_dir_id;
+	inode = iget5_locked(s, key->on_disk_key.k_objectid,
+			     reiserfs_find_actor, reiserfs_init_locked_inode,
+			     (void *)(&args));
+	if (!inode)
+		return ERR_PTR(-ENOMEM);
+
+	if (inode->i_state & I_NEW) {
+		reiserfs_read_locked_inode(inode, &args);
+		unlock_new_inode(inode);
+	}
+
+	if (comp_short_keys(INODE_PKEY(inode), key) || is_bad_inode(inode)) {
+		/* either due to i/o error or a stale NFS handle */
+		iput(inode);
+		inode = NULL;
+	}
+	return inode;
+}
+
+static struct dentry *reiserfs_get_dentry(struct super_block *sb,
+	u32 objectid, u32 dir_id, u32 generation)
+
+{
+	struct cpu_key key;
+	struct inode *inode;
+
+	key.on_disk_key.k_objectid = objectid;
+	key.on_disk_key.k_dir_id = dir_id;
+	reiserfs_write_lock(sb);
+	inode = reiserfs_iget(sb, &key);
+	if (inode && !IS_ERR(inode) && generation != 0 &&
+	    generation != inode->i_generation) {
+		iput(inode);
+		inode = NULL;
+	}
+	reiserfs_write_unlock(sb);
+
+	return d_obtain_alias(inode);
+}
+
+struct dentry *reiserfs_fh_to_dentry(struct super_block *sb, struct fid *fid,
+		int fh_len, int fh_type)
+{
+	/* fhtype happens to reflect the number of u32s encoded.
+	 * due to a bug in earlier code, fhtype might indicate there
+	 * are more u32s then actually fitted.
+	 * so if fhtype seems to be more than len, reduce fhtype.
+	 * Valid types are:
+	 *   2 - objectid + dir_id - legacy support
+	 *   3 - objectid + dir_id + generation
+	 *   4 - objectid + dir_id + objectid and dirid of parent - legacy
+	 *   5 - objectid + dir_id + generation + objectid and dirid of parent
+	 *   6 - as above plus generation of directory
+	 * 6 does not fit in NFSv2 handles
+	 */
+	if (fh_type > fh_len) {
+		if (fh_type != 6 || fh_len != 5)
+			reiserfs_warning(sb,
+				"nfsd/reiserfs, fhtype=%d, len=%d - odd",
+				fh_type, fh_len);
+		fh_type = 5;
+	}
+
+	return reiserfs_get_dentry(sb, fid->raw[0], fid->raw[1],
+		(fh_type == 3 || fh_type >= 5) ? fid->raw[2] : 0);
+}
+
+struct dentry *reiserfs_fh_to_parent(struct super_block *sb, struct fid *fid,
+		int fh_len, int fh_type)
+{
+	if (fh_type < 4)
+		return NULL;
+
+	return reiserfs_get_dentry(sb,
+		(fh_type >= 5) ? fid->raw[3] : fid->raw[2],
+		(fh_type >= 5) ? fid->raw[4] : fid->raw[3],
+		(fh_type == 6) ? fid->raw[5] : 0);
+}
+
+int reiserfs_encode_fh(struct dentry *dentry, __u32 * data, int *lenp,
+		       int need_parent)
+{
+	struct inode *inode = dentry->d_inode;
+	int maxlen = *lenp;
+
+	if (maxlen < 3)
+		return 255;
+
+	data[0] = inode->i_ino;
+	data[1] = le32_to_cpu(INODE_PKEY(inode)->k_dir_id);
+	data[2] = inode->i_generation;
+	*lenp = 3;
+	/* no room for directory info? return what we've stored so far */
+	if (maxlen < 5 || !need_parent)
+		return 3;
+
+	spin_lock(&dentry->d_lock);
+	inode = dentry->d_parent->d_inode;
+	data[3] = inode->i_ino;
+	data[4] = le32_to_cpu(INODE_PKEY(inode)->k_dir_id);
+	*lenp = 5;
+	if (maxlen >= 6) {
+		data[5] = inode->i_generation;
+		*lenp = 6;
+	}
+	spin_unlock(&dentry->d_lock);
+	return *lenp;
+}
+
+/* looks for stat data, then copies fields to it, marks the buffer
+   containing stat data as dirty */
+/* reiserfs inodes are never really dirty, since the dirty inode call
+** always logs them.  This call allows the VFS inode marking routines
+** to properly mark inodes for datasync and such, but only actually
+** does something when called for a synchronous update.
+*/
+int reiserfs_write_inode(struct inode *inode, int do_sync)
+{
+	struct reiserfs_transaction_handle th;
+	int jbegin_count = 1;
+
+	if (inode->i_sb->s_flags & MS_RDONLY)
+		return -EROFS;
+	/* memory pressure can sometimes initiate write_inode calls with sync == 1,
+	 ** these cases are just when the system needs ram, not when the 
+	 ** inode needs to reach disk for safety, and they can safely be
+	 ** ignored because the altered inode has already been logged.
+	 */
+	if (do_sync && !(current->flags & PF_MEMALLOC)) {
+		reiserfs_write_lock(inode->i_sb);
+		if (!journal_begin(&th, inode->i_sb, jbegin_count)) {
+			reiserfs_update_sd(&th, inode);
+			journal_end_sync(&th, inode->i_sb, jbegin_count);
+		}
+		reiserfs_write_unlock(inode->i_sb);
+	}
+	return 0;
+}
+
+/* stat data of new object is inserted already, this inserts the item
+   containing "." and ".." entries */
+static int reiserfs_new_directory(struct reiserfs_transaction_handle *th,
+				  struct inode *inode,
+				  struct item_head *ih, struct treepath *path,
+				  struct inode *dir)
+{
+	struct super_block *sb = th->t_super;
+	char empty_dir[EMPTY_DIR_SIZE];
+	char *body = empty_dir;
+	struct cpu_key key;
+	int retval;
+
+	BUG_ON(!th->t_trans_id);
+
+	_make_cpu_key(&key, KEY_FORMAT_3_5, le32_to_cpu(ih->ih_key.k_dir_id),
+		      le32_to_cpu(ih->ih_key.k_objectid), DOT_OFFSET,
+		      TYPE_DIRENTRY, 3 /*key length */ );
+
+	/* compose item head for new item. Directories consist of items of
+	   old type (ITEM_VERSION_1). Do not set key (second arg is 0), it
+	   is done by reiserfs_new_inode */
+	if (old_format_only(sb)) {
+		make_le_item_head(ih, NULL, KEY_FORMAT_3_5, DOT_OFFSET,
+				  TYPE_DIRENTRY, EMPTY_DIR_SIZE_V1, 2);
+
+		make_empty_dir_item_v1(body, ih->ih_key.k_dir_id,
+				       ih->ih_key.k_objectid,
+				       INODE_PKEY(dir)->k_dir_id,
+				       INODE_PKEY(dir)->k_objectid);
+	} else {
+		make_le_item_head(ih, NULL, KEY_FORMAT_3_5, DOT_OFFSET,
+				  TYPE_DIRENTRY, EMPTY_DIR_SIZE, 2);
+
+		make_empty_dir_item(body, ih->ih_key.k_dir_id,
+				    ih->ih_key.k_objectid,
+				    INODE_PKEY(dir)->k_dir_id,
+				    INODE_PKEY(dir)->k_objectid);
+	}
+
+	/* look for place in the tree for new item */
+	retval = search_item(sb, &key, path);
+	if (retval == IO_ERROR) {
+		reiserfs_warning(sb, "vs-13080: reiserfs_new_directory: "
+				 "i/o failure occurred creating new directory");
+		return -EIO;
+	}
+	if (retval == ITEM_FOUND) {
+		pathrelse(path);
+		reiserfs_warning(sb, "vs-13070: reiserfs_new_directory: "
+				 "object with this key exists (%k)",
+				 &(ih->ih_key));
+		return -EEXIST;
+	}
+
+	/* insert item, that is empty directory item */
+	return reiserfs_insert_item(th, path, &key, ih, inode, body);
+}
+
+/* stat data of object has been inserted, this inserts the item
+   containing the body of symlink */
+static int reiserfs_new_symlink(struct reiserfs_transaction_handle *th, struct inode *inode,	/* Inode of symlink */
+				struct item_head *ih,
+				struct treepath *path, const char *symname,
+				int item_len)
+{
+	struct super_block *sb = th->t_super;
+	struct cpu_key key;
+	int retval;
+
+	BUG_ON(!th->t_trans_id);
+
+	_make_cpu_key(&key, KEY_FORMAT_3_5,
+		      le32_to_cpu(ih->ih_key.k_dir_id),
+		      le32_to_cpu(ih->ih_key.k_objectid),
+		      1, TYPE_DIRECT, 3 /*key length */ );
+
+	make_le_item_head(ih, NULL, KEY_FORMAT_3_5, 1, TYPE_DIRECT, item_len,
+			  0 /*free_space */ );
+
+	/* look for place in the tree for new item */
+	retval = search_item(sb, &key, path);
+	if (retval == IO_ERROR) {
+		reiserfs_warning(sb, "vs-13080: reiserfs_new_symlinik: "
+				 "i/o failure occurred creating new symlink");
+		return -EIO;
+	}
+	if (retval == ITEM_FOUND) {
+		pathrelse(path);
+		reiserfs_warning(sb, "vs-13080: reiserfs_new_symlink: "
+				 "object with this key exists (%k)",
+				 &(ih->ih_key));
+		return -EEXIST;
+	}
+
+	/* insert item, that is body of symlink */
+	return reiserfs_insert_item(th, path, &key, ih, inode, symname);
+}
+
+/* inserts the stat data into the tree, and then calls
+   reiserfs_new_directory (to insert ".", ".." item if new object is
+   directory) or reiserfs_new_symlink (to insert symlink body if new
+   object is symlink) or nothing (if new object is regular file) 
+
+   NOTE! uid and gid must already be set in the inode.  If we return
+   non-zero due to an error, we have to drop the quota previously allocated
+   for the fresh inode.  This can only be done outside a transaction, so
+   if we return non-zero, we also end the transaction.  */
+int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
+		       struct inode *dir, int mode, const char *symname,
+		       /* 0 for regular, EMTRY_DIR_SIZE for dirs, 
+		          strlen (symname) for symlinks) */
+		       loff_t i_size, struct dentry *dentry,
+		       struct inode *inode)
+{
+	struct super_block *sb;
+	INITIALIZE_PATH(path_to_key);
+	struct cpu_key key;
+	struct item_head ih;
+	struct stat_data sd;
+	int retval;
+	int err;
+
+	BUG_ON(!th->t_trans_id);
+
+	if (DQUOT_ALLOC_INODE(inode)) {
+		err = -EDQUOT;
+		goto out_end_trans;
+	}
+	if (!dir->i_nlink) {
+		err = -EPERM;
+		goto out_bad_inode;
+	}
+
+	sb = dir->i_sb;
+
+	/* item head of new item */
+	ih.ih_key.k_dir_id = reiserfs_choose_packing(dir);
+	ih.ih_key.k_objectid = cpu_to_le32(reiserfs_get_unused_objectid(th));
+	if (!ih.ih_key.k_objectid) {
+		err = -ENOMEM;
+		goto out_bad_inode;
+	}
+	if (old_format_only(sb))
+		/* not a perfect generation count, as object ids can be reused, but 
+		 ** this is as good as reiserfs can do right now.
+		 ** note that the private part of inode isn't filled in yet, we have
+		 ** to use the directory.
+		 */
+		inode->i_generation = le32_to_cpu(INODE_PKEY(dir)->k_objectid);
+	else
+#if defined( USE_INODE_GENERATION_COUNTER )
+		inode->i_generation =
+		    le32_to_cpu(REISERFS_SB(sb)->s_rs->s_inode_generation);
+#else
+		inode->i_generation = ++event;
+#endif
+
+	/* fill stat data */
+	inode->i_nlink = (S_ISDIR(mode) ? 2 : 1);
+
+	/* uid and gid must already be set by the caller for quota init */
+
+	/* symlink cannot be immutable or append only, right? */
+	if (S_ISLNK(inode->i_mode))
+		inode->i_flags &= ~(S_IMMUTABLE | S_APPEND);
+
+	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
+	inode->i_size = i_size;
+	inode->i_blocks = 0;
+	inode->i_bytes = 0;
+	REISERFS_I(inode)->i_first_direct_byte = S_ISLNK(mode) ? 1 :
+	    U32_MAX /*NO_BYTES_IN_DIRECT_ITEM */ ;
+
+	INIT_LIST_HEAD(&(REISERFS_I(inode)->i_prealloc_list));
+	REISERFS_I(inode)->i_flags = 0;
+	REISERFS_I(inode)->i_prealloc_block = 0;
+	REISERFS_I(inode)->i_prealloc_count = 0;
+	REISERFS_I(inode)->i_trans_id = 0;
+	REISERFS_I(inode)->i_jl = NULL;
+	REISERFS_I(inode)->i_attrs =
+	    REISERFS_I(dir)->i_attrs & REISERFS_INHERIT_MASK;
+	sd_attrs_to_i_attrs(REISERFS_I(inode)->i_attrs, inode);
+	mutex_init(&(REISERFS_I(inode)->i_mmap));
+	reiserfs_init_acl_access(inode);
+	reiserfs_init_acl_default(inode);
+	reiserfs_init_xattr_rwsem(inode);
+
+	if (old_format_only(sb))
+		make_le_item_head(&ih, NULL, KEY_FORMAT_3_5, SD_OFFSET,
+				  TYPE_STAT_DATA, SD_V1_SIZE, MAX_US_INT);
+	else
+		make_le_item_head(&ih, NULL, KEY_FORMAT_3_6, SD_OFFSET,
+				  TYPE_STAT_DATA, SD_SIZE, MAX_US_INT);
+
+	/* key to search for correct place for new stat data */
+	_make_cpu_key(&key, KEY_FORMAT_3_6, le32_to_cpu(ih.ih_key.k_dir_id),
+		      le32_to_cpu(ih.ih_key.k_objectid), SD_OFFSET,
+		      TYPE_STAT_DATA, 3 /*key length */ );
+
+	/* find proper place for inserting of stat data */
+	retval = search_item(sb, &key, &path_to_key);
+	if (retval == IO_ERROR) {
+		err = -EIO;
+		goto out_bad_inode;
+	}
+	if (retval == ITEM_FOUND) {
+		pathrelse(&path_to_key);
+		err = -EEXIST;
+		goto out_bad_inode;
+	}
+	if (old_format_only(sb)) {
+		if (inode->i_uid & ~0xffff || inode->i_gid & ~0xffff) {
+			pathrelse(&path_to_key);
+			/* i_uid or i_gid is too big to be stored in stat data v3.5 */
+			err = -EINVAL;
+			goto out_bad_inode;
+		}
+		inode2sd_v1(&sd, inode, inode->i_size);
+	} else {
+		inode2sd(&sd, inode, inode->i_size);
+	}
+	// these do not go to on-disk stat data
+	inode->i_ino = le32_to_cpu(ih.ih_key.k_objectid);
+
+	// store in in-core inode the key of stat data and version all
+	// object items will have (directory items will have old offset
+	// format, other new objects will consist of new items)
+	memcpy(INODE_PKEY(inode), &(ih.ih_key), KEY_SIZE);
+	if (old_format_only(sb) || S_ISDIR(mode) || S_ISLNK(mode))
+		set_inode_item_key_version(inode, KEY_FORMAT_3_5);
+	else
+		set_inode_item_key_version(inode, KEY_FORMAT_3_6);
+	if (old_format_only(sb))
+		set_inode_sd_version(inode, STAT_DATA_V1);
+	else
+		set_inode_sd_version(inode, STAT_DATA_V2);
+
+	/* insert the stat data into the tree */
+#ifdef DISPLACE_NEW_PACKING_LOCALITIES
+	if (REISERFS_I(dir)->new_packing_locality)
+		th->displace_new_blocks = 1;
+#endif
+	retval =
+	    reiserfs_insert_item(th, &path_to_key, &key, &ih, inode,
+				 (char *)(&sd));
+	if (retval) {
+		err = retval;
+		reiserfs_check_path(&path_to_key);
+		goto out_bad_inode;
+	}
+#ifdef DISPLACE_NEW_PACKING_LOCALITIES
+	if (!th->displace_new_blocks)
+		REISERFS_I(dir)->new_packing_locality = 0;
+#endif
+	if (S_ISDIR(mode)) {
+		/* insert item with "." and ".." */
+		retval =
+		    reiserfs_new_directory(th, inode, &ih, &path_to_key, dir);
+	}
+
+	if (S_ISLNK(mode)) {
+		/* insert body of symlink */
+		if (!old_format_only(sb))
+			i_size = ROUND_UP(i_size);
+		retval =
+		    reiserfs_new_symlink(th, inode, &ih, &path_to_key, symname,
+					 i_size);
+	}
+	if (retval) {
+		err = retval;
+		reiserfs_check_path(&path_to_key);
+		journal_end(th, th->t_super, th->t_blocks_allocated);
+		goto out_inserted_sd;
+	}
+
+	/* XXX CHECK THIS */
+	if (reiserfs_posixacl(inode->i_sb)) {
+		retval = reiserfs_inherit_default_acl(dir, dentry, inode);
+		if (retval) {
+			err = retval;
+			reiserfs_check_path(&path_to_key);
+			journal_end(th, th->t_super, th->t_blocks_allocated);
+			goto out_inserted_sd;
+		}
+	} else if (inode->i_sb->s_flags & MS_POSIXACL) {
+		reiserfs_warning(inode->i_sb, "ACLs aren't enabled in the fs, "
+				 "but vfs thinks they are!");
+	} else if (is_reiserfs_priv_object(dir)) {
+		reiserfs_mark_inode_private(inode);
+	}
+
+	insert_inode_hash(inode);
+	reiserfs_update_sd(th, inode);
+	reiserfs_check_path(&path_to_key);
+
+	return 0;
+
+/* it looks like you can easily compress these two goto targets into
+ * one.  Keeping it like this doesn't actually hurt anything, and they
+ * are place holders for what the quota code actually needs.
+ */
+      out_bad_inode:
+	/* Invalidate the object, nothing was inserted yet */
+	INODE_PKEY(inode)->k_objectid = 0;
+
+	/* Quota change must be inside a transaction for journaling */
+	DQUOT_FREE_INODE(inode);
+
+      out_end_trans:
+	journal_end(th, th->t_super, th->t_blocks_allocated);
+	/* Drop can be outside and it needs more credits so it's better to have it outside */
+	DQUOT_DROP(inode);
+	inode->i_flags |= S_NOQUOTA;
+	make_bad_inode(inode);
+
+      out_inserted_sd:
+	inode->i_nlink = 0;
+	th->t_trans_id = 0;	/* so the caller can't use this handle later */
+
+	/* If we were inheriting an ACL, we need to release the lock so that
+	 * iput doesn't deadlock in reiserfs_delete_xattrs. The locking
+	 * code really needs to be reworked, but this will take care of it
+	 * for now. -jeffm */
+#ifdef CONFIG_REISERFS_FS_POSIX_ACL
+	if (REISERFS_I(dir)->i_acl_default && !IS_ERR(REISERFS_I(dir)->i_acl_default)) {
+		reiserfs_write_unlock_xattrs(dir->i_sb);
+		iput(inode);
+		reiserfs_write_lock_xattrs(dir->i_sb);
+	} else
+#endif
+		iput(inode);
+	return err;
+}
+
+/*
+** finds the tail page in the page cache,
+** reads the last block in.
+**
+** On success, page_result is set to a locked, pinned page, and bh_result
+** is set to an up to date buffer for the last block in the file.  returns 0.
+**
+** tail conversion is not done, so bh_result might not be valid for writing
+** check buffer_mapped(bh_result) and bh_result->b_blocknr != 0 before
+** trying to write the block.
+**
+** on failure, nonzero is returned, page_result and bh_result are untouched.
+*/
+static int grab_tail_page(struct inode *p_s_inode,
+			  struct page **page_result,
+			  struct buffer_head **bh_result)
+{
+
+	/* we want the page with the last byte in the file,
+	 ** not the page that will hold the next byte for appending
+	 */
+	unsigned long index = (p_s_inode->i_size - 1) >> PAGE_CACHE_SHIFT;
+	unsigned long pos = 0;
+	unsigned long start = 0;
+	unsigned long blocksize = p_s_inode->i_sb->s_blocksize;
+	unsigned long offset = (p_s_inode->i_size) & (PAGE_CACHE_SIZE - 1);
+	struct buffer_head *bh;
+	struct buffer_head *head;
+	struct page *page;
+	int error;
+
+	/* we know that we are only called with inode->i_size > 0.
+	 ** we also know that a file tail can never be as big as a block
+	 ** If i_size % blocksize == 0, our file is currently block aligned
+	 ** and it won't need converting or zeroing after a truncate.
+	 */
+	if ((offset & (blocksize - 1)) == 0) {
+		return -ENOENT;
+	}
+	page = grab_cache_page(p_s_inode->i_mapping, index);
+	error = -ENOMEM;
+	if (!page) {
+		goto out;
+	}
+	/* start within the page of the last block in the file */
+	start = (offset / blocksize) * blocksize;
+
+	error = block_prepare_write(page, start, offset,
+				    reiserfs_get_block_create_0);
+	if (error)
+		goto unlock;
+
+	head = page_buffers(page);
+	bh = head;
+	do {
+		if (pos >= start) {
+			break;
+		}
+		bh = bh->b_this_page;
+		pos += blocksize;
+	} while (bh != head);
+
+	if (!buffer_uptodate(bh)) {
+		/* note, this should never happen, prepare_write should
+		 ** be taking care of this for us.  If the buffer isn't up to date,
+		 ** I've screwed up the code to find the buffer, or the code to
+		 ** call prepare_write
+		 */
+		reiserfs_warning(p_s_inode->i_sb,
+				 "clm-6000: error reading block %lu on dev %s",
+				 bh->b_blocknr,
+				 reiserfs_bdevname(p_s_inode->i_sb));
+		error = -EIO;
+		goto unlock;
+	}
+	*bh_result = bh;
+	*page_result = page;
+
+      out:
+	return error;
+
+      unlock:
+	unlock_page(page);
+	page_cache_release(page);
+	return error;
+}
+
+/*
+** vfs version of truncate file.  Must NOT be called with
+** a transaction already started.
+**
+** some code taken from block_truncate_page
+*/
+int reiserfs_truncate_file(struct inode *p_s_inode, int update_timestamps)
+{
+	struct reiserfs_transaction_handle th;
+	/* we want the offset for the first byte after the end of the file */
+	unsigned long offset = p_s_inode->i_size & (PAGE_CACHE_SIZE - 1);
+	unsigned blocksize = p_s_inode->i_sb->s_blocksize;
+	unsigned length;
+	struct page *page = NULL;
+	int error;
+	struct buffer_head *bh = NULL;
+	int err2;
+
+	reiserfs_write_lock(p_s_inode->i_sb);
+
+	if (p_s_inode->i_size > 0) {
+		if ((error = grab_tail_page(p_s_inode, &page, &bh))) {
+			// -ENOENT means we truncated past the end of the file, 
+			// and get_block_create_0 could not find a block to read in,
+			// which is ok.
+			if (error != -ENOENT)
+				reiserfs_warning(p_s_inode->i_sb,
+						 "clm-6001: grab_tail_page failed %d",
+						 error);
+			page = NULL;
+			bh = NULL;
+		}
+	}
+
+	/* so, if page != NULL, we have a buffer head for the offset at 
+	 ** the end of the file. if the bh is mapped, and bh->b_blocknr != 0, 
+	 ** then we have an unformatted node.  Otherwise, we have a direct item, 
+	 ** and no zeroing is required on disk.  We zero after the truncate, 
+	 ** because the truncate might pack the item anyway 
+	 ** (it will unmap bh if it packs).
+	 */
+	/* it is enough to reserve space in transaction for 2 balancings:
+	   one for "save" link adding and another for the first
+	   cut_from_item. 1 is for update_sd */
+	error = journal_begin(&th, p_s_inode->i_sb,
+			      JOURNAL_PER_BALANCE_CNT * 2 + 1);
+	if (error)
+		goto out;
+	reiserfs_update_inode_transaction(p_s_inode);
+	if (update_timestamps)
+		/* we are doing real truncate: if the system crashes before the last
+		   transaction of truncating gets committed - on reboot the file
+		   either appears truncated properly or not truncated at all */
+		add_save_link(&th, p_s_inode, 1);
+	err2 = reiserfs_do_truncate(&th, p_s_inode, page, update_timestamps);
+	error =
+	    journal_end(&th, p_s_inode->i_sb, JOURNAL_PER_BALANCE_CNT * 2 + 1);
+	if (error)
+		goto out;
+
+	/* check reiserfs_do_truncate after ending the transaction */
+	if (err2) {
+		error = err2;
+  		goto out;
+	}
+	
+	if (update_timestamps) {
+		error = remove_save_link(p_s_inode, 1 /* truncate */ );
+		if (error)
+			goto out;
+	}
+
+	if (page) {
+		length = offset & (blocksize - 1);
+		/* if we are not on a block boundary */
+		if (length) {
+			length = blocksize - length;
+			zero_user(page, offset, length);
+			if (buffer_mapped(bh) && bh->b_blocknr != 0) {
+				mark_buffer_dirty(bh);
+			}
+		}
+		unlock_page(page);
+		page_cache_release(page);
+	}
+
+	reiserfs_write_unlock(p_s_inode->i_sb);
+	return 0;
+      out:
+	if (page) {
+		unlock_page(page);
+		page_cache_release(page);
+	}
+	reiserfs_write_unlock(p_s_inode->i_sb);
+	return error;
+}
+
+static int map_block_for_writepage(struct inode *inode,
+				   struct buffer_head *bh_result,
+				   unsigned long block)
+{
+	struct reiserfs_transaction_handle th;
+	int fs_gen;
+	struct item_head tmp_ih;
+	struct item_head *ih;
+	struct buffer_head *bh;
+	__le32 *item;
+	struct cpu_key key;
+	INITIALIZE_PATH(path);
+	int pos_in_item;
+	int jbegin_count = JOURNAL_PER_BALANCE_CNT;
+	loff_t byte_offset = ((loff_t)block << inode->i_sb->s_blocksize_bits)+1;
+	int retval;
+	int use_get_block = 0;
+	int bytes_copied = 0;
+	int copy_size;
+	int trans_running = 0;
+
+	/* catch places below that try to log something without starting a trans */
+	th.t_trans_id = 0;
+
+	if (!buffer_uptodate(bh_result)) {
+		return -EIO;
+	}
+
+	kmap(bh_result->b_page);
+      start_over:
+	reiserfs_write_lock(inode->i_sb);
+	make_cpu_key(&key, inode, byte_offset, TYPE_ANY, 3);
+
+      research:
+	retval = search_for_position_by_key(inode->i_sb, &key, &path);
+	if (retval != POSITION_FOUND) {
+		use_get_block = 1;
+		goto out;
+	}
+
+	bh = get_last_bh(&path);
+	ih = get_ih(&path);
+	item = get_item(&path);
+	pos_in_item = path.pos_in_item;
+
+	/* we've found an unformatted node */
+	if (indirect_item_found(retval, ih)) {
+		if (bytes_copied > 0) {
+			reiserfs_warning(inode->i_sb,
+					 "clm-6002: bytes_copied %d",
+					 bytes_copied);
+		}
+		if (!get_block_num(item, pos_in_item)) {
+			/* crap, we are writing to a hole */
+			use_get_block = 1;
+			goto out;
+		}
+		set_block_dev_mapped(bh_result,
+				     get_block_num(item, pos_in_item), inode);
+	} else if (is_direct_le_ih(ih)) {
+		char *p;
+		p = page_address(bh_result->b_page);
+		p += (byte_offset - 1) & (PAGE_CACHE_SIZE - 1);
+		copy_size = ih_item_len(ih) - pos_in_item;
+
+		fs_gen = get_generation(inode->i_sb);
+		copy_item_head(&tmp_ih, ih);
+
+		if (!trans_running) {
+			/* vs-3050 is gone, no need to drop the path */
+			retval = journal_begin(&th, inode->i_sb, jbegin_count);
+			if (retval)
+				goto out;
+			reiserfs_update_inode_transaction(inode);
+			trans_running = 1;
+			if (fs_changed(fs_gen, inode->i_sb)
+			    && item_moved(&tmp_ih, &path)) {
+				reiserfs_restore_prepared_buffer(inode->i_sb,
+								 bh);
+				goto research;
+			}
+		}
+
+		reiserfs_prepare_for_journal(inode->i_sb, bh, 1);
+
+		if (fs_changed(fs_gen, inode->i_sb)
+		    && item_moved(&tmp_ih, &path)) {
+			reiserfs_restore_prepared_buffer(inode->i_sb, bh);
+			goto research;
+		}
+
+		memcpy(B_I_PITEM(bh, ih) + pos_in_item, p + bytes_copied,
+		       copy_size);
+
+		journal_mark_dirty(&th, inode->i_sb, bh);
+		bytes_copied += copy_size;
+		set_block_dev_mapped(bh_result, 0, inode);
+
+		/* are there still bytes left? */
+		if (bytes_copied < bh_result->b_size &&
+		    (byte_offset + bytes_copied) < inode->i_size) {
+			set_cpu_key_k_offset(&key,
+					     cpu_key_k_offset(&key) +
+					     copy_size);
+			goto research;
+		}
+	} else {
+		reiserfs_warning(inode->i_sb,
+				 "clm-6003: bad item inode %lu, device %s",
+				 inode->i_ino, reiserfs_bdevname(inode->i_sb));
+		retval = -EIO;
+		goto out;
+	}
+	retval = 0;
+
+      out:
+	pathrelse(&path);
+	if (trans_running) {
+		int err = journal_end(&th, inode->i_sb, jbegin_count);
+		if (err)
+			retval = err;
+		trans_running = 0;
+	}
+	reiserfs_write_unlock(inode->i_sb);
+
+	/* this is where we fill in holes in the file. */
+	if (use_get_block) {
+		retval = reiserfs_get_block(inode, block, bh_result,
+					    GET_BLOCK_CREATE | GET_BLOCK_NO_IMUX
+					    | GET_BLOCK_NO_DANGLE);
+		if (!retval) {
+			if (!buffer_mapped(bh_result)
+			    || bh_result->b_blocknr == 0) {
+				/* get_block failed to find a mapped unformatted node. */
+				use_get_block = 0;
+				goto start_over;
+			}
+		}
+	}
+	kunmap(bh_result->b_page);
+
+	if (!retval && buffer_mapped(bh_result) && bh_result->b_blocknr == 0) {
+		/* we've copied data from the page into the direct item, so the
+		 * buffer in the page is now clean, mark it to reflect that.
+		 */
+		lock_buffer(bh_result);
+		clear_buffer_dirty(bh_result);
+		unlock_buffer(bh_result);
+	}
+	return retval;
+}
+
+/* 
+ * mason@suse.com: updated in 2.5.54 to follow the same general io 
+ * start/recovery path as __block_write_full_page, along with special
+ * code to handle reiserfs tails.
+ */
+static int reiserfs_write_full_page(struct page *page,
+				    struct writeback_control *wbc)
+{
+	struct inode *inode = page->mapping->host;
+	unsigned long end_index = inode->i_size >> PAGE_CACHE_SHIFT;
+	int error = 0;
+	unsigned long block;
+	sector_t last_block;
+	struct buffer_head *head, *bh;
+	int partial = 0;
+	int nr = 0;
+	int checked = PageChecked(page);
+	struct reiserfs_transaction_handle th;
+	struct super_block *s = inode->i_sb;
+	int bh_per_page = PAGE_CACHE_SIZE / s->s_blocksize;
+	th.t_trans_id = 0;
+
+	/* no logging allowed when nonblocking or from PF_MEMALLOC */
+	if (checked && (current->flags & PF_MEMALLOC)) {
+		redirty_page_for_writepage(wbc, page);
+		unlock_page(page);
+		return 0;
+	}
+
+	/* The page dirty bit is cleared before writepage is called, which
+	 * means we have to tell create_empty_buffers to make dirty buffers
+	 * The page really should be up to date at this point, so tossing
+	 * in the BH_Uptodate is just a sanity check.
+	 */
+	if (!page_has_buffers(page)) {
+		create_empty_buffers(page, s->s_blocksize,
+				     (1 << BH_Dirty) | (1 << BH_Uptodate));
+	}
+	head = page_buffers(page);
+
+	/* last page in the file, zero out any contents past the
+	 ** last byte in the file
+	 */
+	if (page->index >= end_index) {
+		unsigned last_offset;
+
+		last_offset = inode->i_size & (PAGE_CACHE_SIZE - 1);
+		/* no file contents in this page */
+		if (page->index >= end_index + 1 || !last_offset) {
+			unlock_page(page);
+			return 0;
+		}
+		zero_user_segment(page, last_offset, PAGE_CACHE_SIZE);
+	}
+	bh = head;
+	block = page->index << (PAGE_CACHE_SHIFT - s->s_blocksize_bits);
+	last_block = (i_size_read(inode) - 1) >> inode->i_blkbits;
+	/* first map all the buffers, logging any direct items we find */
+	do {
+		if (block > last_block) {
+			/*
+			 * This can happen when the block size is less than
+			 * the page size.  The corresponding bytes in the page
+			 * were zero filled above
+			 */
+			clear_buffer_dirty(bh);
+			set_buffer_uptodate(bh);
+		} else if ((checked || buffer_dirty(bh)) &&
+		           (!buffer_mapped(bh) || (buffer_mapped(bh)
+						       && bh->b_blocknr ==
+						       0))) {
+			/* not mapped yet, or it points to a direct item, search
+			 * the btree for the mapping info, and log any direct
+			 * items found
+			 */
+			if ((error = map_block_for_writepage(inode, bh, block))) {
+				goto fail;
+			}
+		}
+		bh = bh->b_this_page;
+		block++;
+	} while (bh != head);
+
+	/*
+	 * we start the transaction after map_block_for_writepage,
+	 * because it can create holes in the file (an unbounded operation).
+	 * starting it here, we can make a reliable estimate for how many
+	 * blocks we're going to log
+	 */
+	if (checked) {
+		ClearPageChecked(page);
+		reiserfs_write_lock(s);
+		error = journal_begin(&th, s, bh_per_page + 1);
+		if (error) {
+			reiserfs_write_unlock(s);
+			goto fail;
+		}
+		reiserfs_update_inode_transaction(inode);
+	}
+	/* now go through and lock any dirty buffers on the page */
+	do {
+		get_bh(bh);
+		if (!buffer_mapped(bh))
+			continue;
+		if (buffer_mapped(bh) && bh->b_blocknr == 0)
+			continue;
+
+		if (checked) {
+			reiserfs_prepare_for_journal(s, bh, 1);
+			journal_mark_dirty(&th, s, bh);
+			continue;
+		}
+		/* from this point on, we know the buffer is mapped to a
+		 * real block and not a direct item
+		 */
+		if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
+			lock_buffer(bh);
+		} else {
+			if (!trylock_buffer(bh)) {
+				redirty_page_for_writepage(wbc, page);
+				continue;
+			}
+		}
+		if (test_clear_buffer_dirty(bh)) {
+			mark_buffer_async_write(bh);
+		} else {
+			unlock_buffer(bh);
+		}
+	} while ((bh = bh->b_this_page) != head);
+
+	if (checked) {
+		error = journal_end(&th, s, bh_per_page + 1);
+		reiserfs_write_unlock(s);
+		if (error)
+			goto fail;
+	}
+	BUG_ON(PageWriteback(page));
+	set_page_writeback(page);
+	unlock_page(page);
+
+	/*
+	 * since any buffer might be the only dirty buffer on the page, 
+	 * the first submit_bh can bring the page out of writeback.
+	 * be careful with the buffers.
+	 */
+	do {
+		struct buffer_head *next = bh->b_this_page;
+		if (buffer_async_write(bh)) {
+			submit_bh(WRITE, bh);
+			nr++;
+		}
+		put_bh(bh);
+		bh = next;
+	} while (bh != head);
+
+	error = 0;
+      done:
+	if (nr == 0) {
+		/*
+		 * if this page only had a direct item, it is very possible for
+		 * no io to be required without there being an error.  Or, 
+		 * someone else could have locked them and sent them down the 
+		 * pipe without locking the page
+		 */
+		bh = head;
+		do {
+			if (!buffer_uptodate(bh)) {
+				partial = 1;
+				break;
+			}
+			bh = bh->b_this_page;
+		} while (bh != head);
+		if (!partial)
+			SetPageUptodate(page);
+		end_page_writeback(page);
+	}
+	return error;
+
+      fail:
+	/* catches various errors, we need to make sure any valid dirty blocks
+	 * get to the media.  The page is currently locked and not marked for 
+	 * writeback
+	 */
+	ClearPageUptodate(page);
+	bh = head;
+	do {
+		get_bh(bh);
+		if (buffer_mapped(bh) && buffer_dirty(bh) && bh->b_blocknr) {
+			lock_buffer(bh);
+			mark_buffer_async_write(bh);
+		} else {
+			/*
+			 * clear any dirty bits that might have come from getting
+			 * attached to a dirty page
+			 */
+			clear_buffer_dirty(bh);
+		}
+		bh = bh->b_this_page;
+	} while (bh != head);
+	SetPageError(page);
+	BUG_ON(PageWriteback(page));
+	set_page_writeback(page);
+	unlock_page(page);
+	do {
+		struct buffer_head *next = bh->b_this_page;
+		if (buffer_async_write(bh)) {
+			clear_buffer_dirty(bh);
+			submit_bh(WRITE, bh);
+			nr++;
+		}
+		put_bh(bh);
+		bh = next;
+	} while (bh != head);
+	goto done;
+}
+
+static int reiserfs_readpage(struct file *f, struct page *page)
+{
+	return block_read_full_page(page, reiserfs_get_block);
+}
+
+static int reiserfs_writepage(struct page *page, struct writeback_control *wbc)
+{
+	struct inode *inode = page->mapping->host;
+	reiserfs_wait_on_write_block(inode->i_sb);
+	return reiserfs_write_full_page(page, wbc);
+}
+
+static int reiserfs_write_begin(struct file *file,
+				struct address_space *mapping,
+				loff_t pos, unsigned len, unsigned flags,
+				struct page **pagep, void **fsdata)
+{
+	struct inode *inode;
+	struct page *page;
+	pgoff_t index;
+	int ret;
+	int old_ref = 0;
+
+ 	inode = mapping->host;
+	*fsdata = 0;
+ 	if (flags & AOP_FLAG_CONT_EXPAND &&
+ 	    (pos & (inode->i_sb->s_blocksize - 1)) == 0) {
+ 		pos ++;
+		*fsdata = (void *)(unsigned long)flags;
+	}
+
+	index = pos >> PAGE_CACHE_SHIFT;
+	page = grab_cache_page_write_begin(mapping, index, flags);
+	if (!page)
+		return -ENOMEM;
+	*pagep = page;
+
+	reiserfs_wait_on_write_block(inode->i_sb);
+	fix_tail_page_for_writing(page);
+	if (reiserfs_transaction_running(inode->i_sb)) {
+		struct reiserfs_transaction_handle *th;
+		th = (struct reiserfs_transaction_handle *)current->
+		    journal_info;
+		BUG_ON(!th->t_refcount);
+		BUG_ON(!th->t_trans_id);
+		old_ref = th->t_refcount;
+		th->t_refcount++;
+	}
+	ret = block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
+				reiserfs_get_block);
+	if (ret && reiserfs_transaction_running(inode->i_sb)) {
+		struct reiserfs_transaction_handle *th = current->journal_info;
+		/* this gets a little ugly.  If reiserfs_get_block returned an
+		 * error and left a transacstion running, we've got to close it,
+		 * and we've got to free handle if it was a persistent transaction.
+		 *
+		 * But, if we had nested into an existing transaction, we need
+		 * to just drop the ref count on the handle.
+		 *
+		 * If old_ref == 0, the transaction is from reiserfs_get_block,
+		 * and it was a persistent trans.  Otherwise, it was nested above.
+		 */
+		if (th->t_refcount > old_ref) {
+			if (old_ref)
+				th->t_refcount--;
+			else {
+				int err;
+				reiserfs_write_lock(inode->i_sb);
+				err = reiserfs_end_persistent_transaction(th);
+				reiserfs_write_unlock(inode->i_sb);
+				if (err)
+					ret = err;
+			}
+		}
+	}
+	if (ret) {
+		unlock_page(page);
+		page_cache_release(page);
+	}
+	return ret;
+}
+
+int reiserfs_prepare_write(struct file *f, struct page *page,
+			   unsigned from, unsigned to)
+{
+	struct inode *inode = page->mapping->host;
+	int ret;
+	int old_ref = 0;
+
+	reiserfs_wait_on_write_block(inode->i_sb);
+	fix_tail_page_for_writing(page);
+	if (reiserfs_transaction_running(inode->i_sb)) {
+		struct reiserfs_transaction_handle *th;
+		th = (struct reiserfs_transaction_handle *)current->
+		    journal_info;
+		BUG_ON(!th->t_refcount);
+		BUG_ON(!th->t_trans_id);
+		old_ref = th->t_refcount;
+		th->t_refcount++;
+	}
+
+	ret = block_prepare_write(page, from, to, reiserfs_get_block);
+	if (ret && reiserfs_transaction_running(inode->i_sb)) {
+		struct reiserfs_transaction_handle *th = current->journal_info;
+		/* this gets a little ugly.  If reiserfs_get_block returned an
+		 * error and left a transacstion running, we've got to close it,
+		 * and we've got to free handle if it was a persistent transaction.
+		 *
+		 * But, if we had nested into an existing transaction, we need
+		 * to just drop the ref count on the handle.
+		 *
+		 * If old_ref == 0, the transaction is from reiserfs_get_block,
+		 * and it was a persistent trans.  Otherwise, it was nested above.
+		 */
+		if (th->t_refcount > old_ref) {
+			if (old_ref)
+				th->t_refcount--;
+			else {
+				int err;
+				reiserfs_write_lock(inode->i_sb);
+				err = reiserfs_end_persistent_transaction(th);
+				reiserfs_write_unlock(inode->i_sb);
+				if (err)
+					ret = err;
+			}
+		}
+	}
+	return ret;
+
+}
+
+static sector_t reiserfs_aop_bmap(struct address_space *as, sector_t block)
+{
+	return generic_block_bmap(as, block, reiserfs_bmap);
+}
+
+static int reiserfs_write_end(struct file *file, struct address_space *mapping,
+			      loff_t pos, unsigned len, unsigned copied,
+			      struct page *page, void *fsdata)
+{
+	struct inode *inode = page->mapping->host;
+	int ret = 0;
+	int update_sd = 0;
+	struct reiserfs_transaction_handle *th;
+	unsigned start;
+
+	if ((unsigned long)fsdata & AOP_FLAG_CONT_EXPAND)
+		pos ++;
+
+	reiserfs_wait_on_write_block(inode->i_sb);
+	if (reiserfs_transaction_running(inode->i_sb))
+		th = current->journal_info;
+	else
+		th = NULL;
+
+	start = pos & (PAGE_CACHE_SIZE - 1);
+	if (unlikely(copied < len)) {
+		if (!PageUptodate(page))
+			copied = 0;
+
+		page_zero_new_buffers(page, start + copied, start + len);
+	}
+	flush_dcache_page(page);
+
+	reiserfs_commit_page(inode, page, start, start + copied);
+
+	/* generic_commit_write does this for us, but does not update the
+	 ** transaction tracking stuff when the size changes.  So, we have
+	 ** to do the i_size updates here.
+	 */
+	pos += copied;
+	if (pos > inode->i_size) {
+		struct reiserfs_transaction_handle myth;
+		reiserfs_write_lock(inode->i_sb);
+		/* If the file have grown beyond the border where it
+		   can have a tail, unmark it as needing a tail
+		   packing */
+		if ((have_large_tails(inode->i_sb)
+		     && inode->i_size > i_block_size(inode) * 4)
+		    || (have_small_tails(inode->i_sb)
+			&& inode->i_size > i_block_size(inode)))
+			REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask;
+
+		ret = journal_begin(&myth, inode->i_sb, 1);
+		if (ret) {
+			reiserfs_write_unlock(inode->i_sb);
+			goto journal_error;
+		}
+		reiserfs_update_inode_transaction(inode);
+		inode->i_size = pos;
+		/*
+		 * this will just nest into our transaction.  It's important
+		 * to use mark_inode_dirty so the inode gets pushed around on the
+		 * dirty lists, and so that O_SYNC works as expected
+		 */
+		mark_inode_dirty(inode);
+		reiserfs_update_sd(&myth, inode);
+		update_sd = 1;
+		ret = journal_end(&myth, inode->i_sb, 1);
+		reiserfs_write_unlock(inode->i_sb);
+		if (ret)
+			goto journal_error;
+	}
+	if (th) {
+		reiserfs_write_lock(inode->i_sb);
+		if (!update_sd)
+			mark_inode_dirty(inode);
+		ret = reiserfs_end_persistent_transaction(th);
+		reiserfs_write_unlock(inode->i_sb);
+		if (ret)
+			goto out;
+	}
+
+      out:
+	unlock_page(page);
+	page_cache_release(page);
+	return ret == 0 ? copied : ret;
+
+      journal_error:
+	if (th) {
+		reiserfs_write_lock(inode->i_sb);
+		if (!update_sd)
+			reiserfs_update_sd(th, inode);
+		ret = reiserfs_end_persistent_transaction(th);
+		reiserfs_write_unlock(inode->i_sb);
+	}
+
+	goto out;
+}
+
+int reiserfs_commit_write(struct file *f, struct page *page,
+			  unsigned from, unsigned to)
+{
+	struct inode *inode = page->mapping->host;
+	loff_t pos = ((loff_t) page->index << PAGE_CACHE_SHIFT) + to;
+	int ret = 0;
+	int update_sd = 0;
+	struct reiserfs_transaction_handle *th = NULL;
+
+	reiserfs_wait_on_write_block(inode->i_sb);
+	if (reiserfs_transaction_running(inode->i_sb)) {
+		th = current->journal_info;
+	}
+	reiserfs_commit_page(inode, page, from, to);
+
+	/* generic_commit_write does this for us, but does not update the
+	 ** transaction tracking stuff when the size changes.  So, we have
+	 ** to do the i_size updates here.
+	 */
+	if (pos > inode->i_size) {
+		struct reiserfs_transaction_handle myth;
+		reiserfs_write_lock(inode->i_sb);
+		/* If the file have grown beyond the border where it
+		   can have a tail, unmark it as needing a tail
+		   packing */
+		if ((have_large_tails(inode->i_sb)
+		     && inode->i_size > i_block_size(inode) * 4)
+		    || (have_small_tails(inode->i_sb)
+			&& inode->i_size > i_block_size(inode)))
+			REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask;
+
+		ret = journal_begin(&myth, inode->i_sb, 1);
+		if (ret) {
+			reiserfs_write_unlock(inode->i_sb);
+			goto journal_error;
+		}
+		reiserfs_update_inode_transaction(inode);
+		inode->i_size = pos;
+		/*
+		 * this will just nest into our transaction.  It's important
+		 * to use mark_inode_dirty so the inode gets pushed around on the
+		 * dirty lists, and so that O_SYNC works as expected
+		 */
+		mark_inode_dirty(inode);
+		reiserfs_update_sd(&myth, inode);
+		update_sd = 1;
+		ret = journal_end(&myth, inode->i_sb, 1);
+		reiserfs_write_unlock(inode->i_sb);
+		if (ret)
+			goto journal_error;
+	}
+	if (th) {
+		reiserfs_write_lock(inode->i_sb);
+		if (!update_sd)
+			mark_inode_dirty(inode);
+		ret = reiserfs_end_persistent_transaction(th);
+		reiserfs_write_unlock(inode->i_sb);
+		if (ret)
+			goto out;
+	}
+
+      out:
+	return ret;
+
+      journal_error:
+	if (th) {
+		reiserfs_write_lock(inode->i_sb);
+		if (!update_sd)
+			reiserfs_update_sd(th, inode);
+		ret = reiserfs_end_persistent_transaction(th);
+		reiserfs_write_unlock(inode->i_sb);
+	}
+
+	return ret;
+}
+
+void sd_attrs_to_i_attrs(__u16 sd_attrs, struct inode *inode)
+{
+	if (reiserfs_attrs(inode->i_sb)) {
+		if (sd_attrs & REISERFS_SYNC_FL)
+			inode->i_flags |= S_SYNC;
+		else
+			inode->i_flags &= ~S_SYNC;
+		if (sd_attrs & REISERFS_IMMUTABLE_FL)
+			inode->i_flags |= S_IMMUTABLE;
+		else
+			inode->i_flags &= ~S_IMMUTABLE;
+		if (sd_attrs & REISERFS_APPEND_FL)
+			inode->i_flags |= S_APPEND;
+		else
+			inode->i_flags &= ~S_APPEND;
+		if (sd_attrs & REISERFS_NOATIME_FL)
+			inode->i_flags |= S_NOATIME;
+		else
+			inode->i_flags &= ~S_NOATIME;
+		if (sd_attrs & REISERFS_NOTAIL_FL)
+			REISERFS_I(inode)->i_flags |= i_nopack_mask;
+		else
+			REISERFS_I(inode)->i_flags &= ~i_nopack_mask;
+	}
+}
+
+void i_attrs_to_sd_attrs(struct inode *inode, __u16 * sd_attrs)
+{
+	if (reiserfs_attrs(inode->i_sb)) {
+		if (inode->i_flags & S_IMMUTABLE)
+			*sd_attrs |= REISERFS_IMMUTABLE_FL;
+		else
+			*sd_attrs &= ~REISERFS_IMMUTABLE_FL;
+		if (inode->i_flags & S_SYNC)
+			*sd_attrs |= REISERFS_SYNC_FL;
+		else
+			*sd_attrs &= ~REISERFS_SYNC_FL;
+		if (inode->i_flags & S_NOATIME)
+			*sd_attrs |= REISERFS_NOATIME_FL;
+		else
+			*sd_attrs &= ~REISERFS_NOATIME_FL;
+		if (REISERFS_I(inode)->i_flags & i_nopack_mask)
+			*sd_attrs |= REISERFS_NOTAIL_FL;
+		else
+			*sd_attrs &= ~REISERFS_NOTAIL_FL;
+	}
+}
+
+/* decide if this buffer needs to stay around for data logging or ordered
+** write purposes
+*/
+static int invalidatepage_can_drop(struct inode *inode, struct buffer_head *bh)
+{
+	int ret = 1;
+	struct reiserfs_journal *j = SB_JOURNAL(inode->i_sb);
+
+	lock_buffer(bh);
+	spin_lock(&j->j_dirty_buffers_lock);
+	if (!buffer_mapped(bh)) {
+		goto free_jh;
+	}
+	/* the page is locked, and the only places that log a data buffer
+	 * also lock the page.
+	 */
+	if (reiserfs_file_data_log(inode)) {
+		/*
+		 * very conservative, leave the buffer pinned if
+		 * anyone might need it.
+		 */
+		if (buffer_journaled(bh) || buffer_journal_dirty(bh)) {
+			ret = 0;
+		}
+	} else  if (buffer_dirty(bh)) {
+		struct reiserfs_journal_list *jl;
+		struct reiserfs_jh *jh = bh->b_private;
+
+		/* why is this safe?
+		 * reiserfs_setattr updates i_size in the on disk
+		 * stat data before allowing vmtruncate to be called.
+		 *
+		 * If buffer was put onto the ordered list for this
+		 * transaction, we know for sure either this transaction
+		 * or an older one already has updated i_size on disk,
+		 * and this ordered data won't be referenced in the file
+		 * if we crash.
+		 *
+		 * if the buffer was put onto the ordered list for an older
+		 * transaction, we need to leave it around
+		 */
+		if (jh && (jl = jh->jl)
+		    && jl != SB_JOURNAL(inode->i_sb)->j_current_jl)
+			ret = 0;
+	}
+      free_jh:
+	if (ret && bh->b_private) {
+		reiserfs_free_jh(bh);
+	}
+	spin_unlock(&j->j_dirty_buffers_lock);
+	unlock_buffer(bh);
+	return ret;
+}
+
+/* clm -- taken from fs/buffer.c:block_invalidate_page */
+static void reiserfs_invalidatepage(struct page *page, unsigned long offset)
+{
+	struct buffer_head *head, *bh, *next;
+	struct inode *inode = page->mapping->host;
+	unsigned int curr_off = 0;
+	int ret = 1;
+
+	BUG_ON(!PageLocked(page));
+
+	if (offset == 0)
+		ClearPageChecked(page);
+
+	if (!page_has_buffers(page))
+		goto out;
+
+	head = page_buffers(page);
+	bh = head;
+	do {
+		unsigned int next_off = curr_off + bh->b_size;
+		next = bh->b_this_page;
+
+		/*
+		 * is this block fully invalidated?
+		 */
+		if (offset <= curr_off) {
+			if (invalidatepage_can_drop(inode, bh))
+				reiserfs_unmap_buffer(bh);
+			else
+				ret = 0;
+		}
+		curr_off = next_off;
+		bh = next;
+	} while (bh != head);
+
+	/*
+	 * We release buffers only if the entire page is being invalidated.
+	 * The get_block cached value has been unconditionally invalidated,
+	 * so real IO is not possible anymore.
+	 */
+	if (!offset && ret) {
+		ret = try_to_release_page(page, 0);
+		/* maybe should BUG_ON(!ret); - neilb */
+	}
+      out:
+	return;
+}
+
+static int reiserfs_set_page_dirty(struct page *page)
+{
+	struct inode *inode = page->mapping->host;
+	if (reiserfs_file_data_log(inode)) {
+		SetPageChecked(page);
+		return __set_page_dirty_nobuffers(page);
+	}
+	return __set_page_dirty_buffers(page);
+}
+
+/*
+ * Returns 1 if the page's buffers were dropped.  The page is locked.
+ *
+ * Takes j_dirty_buffers_lock to protect the b_assoc_buffers list_heads
+ * in the buffers at page_buffers(page).
+ *
+ * even in -o notail mode, we can't be sure an old mount without -o notail
+ * didn't create files with tails.
+ */
+static int reiserfs_releasepage(struct page *page, gfp_t unused_gfp_flags)
+{
+	struct inode *inode = page->mapping->host;
+	struct reiserfs_journal *j = SB_JOURNAL(inode->i_sb);
+	struct buffer_head *head;
+	struct buffer_head *bh;
+	int ret = 1;
+
+	WARN_ON(PageChecked(page));
+	spin_lock(&j->j_dirty_buffers_lock);
+	head = page_buffers(page);
+	bh = head;
+	do {
+		if (bh->b_private) {
+			if (!buffer_dirty(bh) && !buffer_locked(bh)) {
+				reiserfs_free_jh(bh);
+			} else {
+				ret = 0;
+				break;
+			}
+		}
+		bh = bh->b_this_page;
+	} while (bh != head);
+	if (ret)
+		ret = try_to_free_buffers(page);
+	spin_unlock(&j->j_dirty_buffers_lock);
+	return ret;
+}
+
+/* We thank Mingming Cao for helping us understand in great detail what
+   to do in this section of the code. */
+static ssize_t reiserfs_direct_IO(int rw, struct kiocb *iocb,
+				  const struct iovec *iov, loff_t offset,
+				  unsigned long nr_segs)
+{
+	struct file *file = iocb->ki_filp;
+	struct inode *inode = file->f_mapping->host;
+
+	return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
+				  offset, nr_segs,
+				  reiserfs_get_blocks_direct_io, NULL);
+}
+
+int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+	struct inode *inode = dentry->d_inode;
+	int error;
+	unsigned int ia_valid;
+
+	/* must be turned off for recursive notify_change calls */
+	ia_valid = attr->ia_valid &= ~(ATTR_KILL_SUID|ATTR_KILL_SGID);
+
+	reiserfs_write_lock(inode->i_sb);
+	if (attr->ia_valid & ATTR_SIZE) {
+		/* version 2 items will be caught by the s_maxbytes check
+		 ** done for us in vmtruncate
+		 */
+		if (get_inode_item_key_version(inode) == KEY_FORMAT_3_5 &&
+		    attr->ia_size > MAX_NON_LFS) {
+			error = -EFBIG;
+			goto out;
+		}
+		/* fill in hole pointers in the expanding truncate case. */
+		if (attr->ia_size > inode->i_size) {
+			error = generic_cont_expand_simple(inode, attr->ia_size);
+			if (REISERFS_I(inode)->i_prealloc_count > 0) {
+				int err;
+				struct reiserfs_transaction_handle th;
+				/* we're changing at most 2 bitmaps, inode + super */
+				err = journal_begin(&th, inode->i_sb, 4);
+				if (!err) {
+					reiserfs_discard_prealloc(&th, inode);
+					err = journal_end(&th, inode->i_sb, 4);
+				}
+				if (err)
+					error = err;
+			}
+			if (error)
+				goto out;
+			/*
+			 * file size is changed, ctime and mtime are
+			 * to be updated
+			 */
+			attr->ia_valid |= (ATTR_MTIME | ATTR_CTIME);
+		}
+	}
+
+	if ((((attr->ia_valid & ATTR_UID) && (attr->ia_uid & ~0xffff)) ||
+	     ((attr->ia_valid & ATTR_GID) && (attr->ia_gid & ~0xffff))) &&
+	    (get_inode_sd_version(inode) == STAT_DATA_V1)) {
+		/* stat data of format v3.5 has 16 bit uid and gid */
+		error = -EINVAL;
+		goto out;
+	}
+
+	error = inode_change_ok(inode, attr);
+	if (!error) {
+		if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
+		    (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
+			error = reiserfs_chown_xattrs(inode, attr);
+
+			if (!error) {
+				struct reiserfs_transaction_handle th;
+				int jbegin_count =
+				    2 *
+				    (REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb) +
+				     REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb)) +
+				    2;
+
+				/* (user+group)*(old+new) structure - we count quota info and , inode write (sb, inode) */
+				error =
+				    journal_begin(&th, inode->i_sb,
+						  jbegin_count);
+				if (error)
+					goto out;
+				error =
+				    DQUOT_TRANSFER(inode, attr) ? -EDQUOT : 0;
+				if (error) {
+					journal_end(&th, inode->i_sb,
+						    jbegin_count);
+					goto out;
+				}
+				/* Update corresponding info in inode so that everything is in
+				 * one transaction */
+				if (attr->ia_valid & ATTR_UID)
+					inode->i_uid = attr->ia_uid;
+				if (attr->ia_valid & ATTR_GID)
+					inode->i_gid = attr->ia_gid;
+				mark_inode_dirty(inode);
+				error =
+				    journal_end(&th, inode->i_sb, jbegin_count);
+			}
+		}
+		if (!error)
+			error = inode_setattr(inode, attr);
+	}
+
+	if (!error && reiserfs_posixacl(inode->i_sb)) {
+		if (attr->ia_valid & ATTR_MODE)
+			error = reiserfs_acl_chmod(inode);
+	}
+
+      out:
+	reiserfs_write_unlock(inode->i_sb);
+	return error;
+}
+
+const struct address_space_operations reiserfs_address_space_operations = {
+	.writepage = reiserfs_writepage,
+	.readpage = reiserfs_readpage,
+	.readpages = reiserfs_readpages,
+	.releasepage = reiserfs_releasepage,
+	.invalidatepage = reiserfs_invalidatepage,
+	.sync_page = block_sync_page,
+	.write_begin = reiserfs_write_begin,
+	.write_end = reiserfs_write_end,
+	.bmap = reiserfs_aop_bmap,
+	.direct_IO = reiserfs_direct_IO,
+	.set_page_dirty = reiserfs_set_page_dirty,
+};
diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c
new file mode 100644
index 0000000..8303320
--- /dev/null
+++ b/fs/reiserfs/ioctl.c
@@ -0,0 +1,219 @@
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ */
+
+#include <linux/capability.h>
+#include <linux/fs.h>
+#include <linux/mount.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/time.h>
+#include <asm/uaccess.h>
+#include <linux/pagemap.h>
+#include <linux/smp_lock.h>
+#include <linux/compat.h>
+
+/*
+** reiserfs_ioctl - handler for ioctl for inode
+** supported commands:
+**  1) REISERFS_IOC_UNPACK - try to unpack tail from direct item into indirect
+**                           and prevent packing file (argument arg has to be non-zero)
+**  2) REISERFS_IOC_[GS]ETFLAGS, REISERFS_IOC_[GS]ETVERSION
+**  3) That's all for a while ...
+*/
+int reiserfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
+		   unsigned long arg)
+{
+	unsigned int flags;
+	int err = 0;
+
+	switch (cmd) {
+	case REISERFS_IOC_UNPACK:
+		if (S_ISREG(inode->i_mode)) {
+			if (arg)
+				return reiserfs_unpack(inode, filp);
+			else
+				return 0;
+		} else
+			return -ENOTTY;
+		/* following two cases are taken from fs/ext2/ioctl.c by Remy
+		   Card (card@masi.ibp.fr) */
+	case REISERFS_IOC_GETFLAGS:
+		if (!reiserfs_attrs(inode->i_sb))
+			return -ENOTTY;
+
+		flags = REISERFS_I(inode)->i_attrs;
+		i_attrs_to_sd_attrs(inode, (__u16 *) & flags);
+		return put_user(flags, (int __user *)arg);
+	case REISERFS_IOC_SETFLAGS:{
+			if (!reiserfs_attrs(inode->i_sb))
+				return -ENOTTY;
+
+			err = mnt_want_write(filp->f_path.mnt);
+			if (err)
+				return err;
+
+			if (!is_owner_or_cap(inode)) {
+				err = -EPERM;
+				goto setflags_out;
+			}
+			if (get_user(flags, (int __user *)arg)) {
+				err = -EFAULT;
+				goto setflags_out;
+			}
+			/*
+			 * Is it quota file? Do not allow user to mess with it
+			 */
+			if (IS_NOQUOTA(inode)) {
+				err = -EPERM;
+				goto setflags_out;
+			}
+			if (((flags ^ REISERFS_I(inode)->
+			      i_attrs) & (REISERFS_IMMUTABLE_FL |
+					  REISERFS_APPEND_FL))
+			    && !capable(CAP_LINUX_IMMUTABLE)) {
+				err = -EPERM;
+				goto setflags_out;
+			}
+			if ((flags & REISERFS_NOTAIL_FL) &&
+			    S_ISREG(inode->i_mode)) {
+				int result;
+
+				result = reiserfs_unpack(inode, filp);
+				if (result) {
+					err = result;
+					goto setflags_out;
+				}
+			}
+			sd_attrs_to_i_attrs(flags, inode);
+			REISERFS_I(inode)->i_attrs = flags;
+			inode->i_ctime = CURRENT_TIME_SEC;
+			mark_inode_dirty(inode);
+setflags_out:
+			mnt_drop_write(filp->f_path.mnt);
+			return err;
+		}
+	case REISERFS_IOC_GETVERSION:
+		return put_user(inode->i_generation, (int __user *)arg);
+	case REISERFS_IOC_SETVERSION:
+		if (!is_owner_or_cap(inode))
+			return -EPERM;
+		err = mnt_want_write(filp->f_path.mnt);
+		if (err)
+			return err;
+		if (get_user(inode->i_generation, (int __user *)arg)) {
+			err = -EFAULT;
+			goto setversion_out;
+		}
+		inode->i_ctime = CURRENT_TIME_SEC;
+		mark_inode_dirty(inode);
+setversion_out:
+		mnt_drop_write(filp->f_path.mnt);
+		return err;
+	default:
+		return -ENOTTY;
+	}
+}
+
+#ifdef CONFIG_COMPAT
+long reiserfs_compat_ioctl(struct file *file, unsigned int cmd,
+				unsigned long arg)
+{
+	struct inode *inode = file->f_path.dentry->d_inode;
+	int ret;
+
+	/* These are just misnamed, they actually get/put from/to user an int */
+	switch (cmd) {
+	case REISERFS_IOC32_UNPACK:
+		cmd = REISERFS_IOC_UNPACK;
+		break;
+	case REISERFS_IOC32_GETFLAGS:
+		cmd = REISERFS_IOC_GETFLAGS;
+		break;
+	case REISERFS_IOC32_SETFLAGS:
+		cmd = REISERFS_IOC_SETFLAGS;
+		break;
+	case REISERFS_IOC32_GETVERSION:
+		cmd = REISERFS_IOC_GETVERSION;
+		break;
+	case REISERFS_IOC32_SETVERSION:
+		cmd = REISERFS_IOC_SETVERSION;
+		break;
+	default:
+		return -ENOIOCTLCMD;
+	}
+	lock_kernel();
+	ret = reiserfs_ioctl(inode, file, cmd, (unsigned long) compat_ptr(arg));
+	unlock_kernel();
+	return ret;
+}
+#endif
+
+int reiserfs_commit_write(struct file *f, struct page *page,
+			  unsigned from, unsigned to);
+int reiserfs_prepare_write(struct file *f, struct page *page,
+			   unsigned from, unsigned to);
+/*
+** reiserfs_unpack
+** Function try to convert tail from direct item into indirect.
+** It set up nopack attribute in the REISERFS_I(inode)->nopack
+*/
+int reiserfs_unpack(struct inode *inode, struct file *filp)
+{
+	int retval = 0;
+	int index;
+	struct page *page;
+	struct address_space *mapping;
+	unsigned long write_from;
+	unsigned long blocksize = inode->i_sb->s_blocksize;
+
+	if (inode->i_size == 0) {
+		REISERFS_I(inode)->i_flags |= i_nopack_mask;
+		return 0;
+	}
+	/* ioctl already done */
+	if (REISERFS_I(inode)->i_flags & i_nopack_mask) {
+		return 0;
+	}
+
+	/* we need to make sure nobody is changing the file size beneath
+	 ** us
+	 */
+	mutex_lock(&inode->i_mutex);
+	reiserfs_write_lock(inode->i_sb);
+
+	write_from = inode->i_size & (blocksize - 1);
+	/* if we are on a block boundary, we are already unpacked.  */
+	if (write_from == 0) {
+		REISERFS_I(inode)->i_flags |= i_nopack_mask;
+		goto out;
+	}
+
+	/* we unpack by finding the page with the tail, and calling
+	 ** reiserfs_prepare_write on that page.  This will force a 
+	 ** reiserfs_get_block to unpack the tail for us.
+	 */
+	index = inode->i_size >> PAGE_CACHE_SHIFT;
+	mapping = inode->i_mapping;
+	page = grab_cache_page(mapping, index);
+	retval = -ENOMEM;
+	if (!page) {
+		goto out;
+	}
+	retval = reiserfs_prepare_write(NULL, page, write_from, write_from);
+	if (retval)
+		goto out_unlock;
+
+	/* conversion can change page contents, must flush */
+	flush_dcache_page(page);
+	retval = reiserfs_commit_write(NULL, page, write_from, write_from);
+	REISERFS_I(inode)->i_flags |= i_nopack_mask;
+
+      out_unlock:
+	unlock_page(page);
+	page_cache_release(page);
+
+      out:
+	mutex_unlock(&inode->i_mutex);
+	reiserfs_write_unlock(inode->i_sb);
+	return retval;
+}
diff --git a/fs/reiserfs/item_ops.c b/fs/reiserfs/item_ops.c
new file mode 100644
index 0000000..9475557
--- /dev/null
+++ b/fs/reiserfs/item_ops.c
@@ -0,0 +1,750 @@
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ */
+
+#include <linux/time.h>
+#include <linux/reiserfs_fs.h>
+
+// this contains item handlers for old item types: sd, direct,
+// indirect, directory
+
+/* and where are the comments? how about saying where we can find an
+   explanation of each item handler method? -Hans */
+
+//////////////////////////////////////////////////////////////////////////////
+// stat data functions
+//
+static int sd_bytes_number(struct item_head *ih, int block_size)
+{
+	return 0;
+}
+
+static void sd_decrement_key(struct cpu_key *key)
+{
+	key->on_disk_key.k_objectid--;
+	set_cpu_key_k_type(key, TYPE_ANY);
+	set_cpu_key_k_offset(key, (loff_t)(~0ULL >> 1));
+}
+
+static int sd_is_left_mergeable(struct reiserfs_key *key, unsigned long bsize)
+{
+	return 0;
+}
+
+static char *print_time(time_t t)
+{
+	static char timebuf[256];
+
+	sprintf(timebuf, "%ld", t);
+	return timebuf;
+}
+
+static void sd_print_item(struct item_head *ih, char *item)
+{
+	printk("\tmode | size | nlinks | first direct | mtime\n");
+	if (stat_data_v1(ih)) {
+		struct stat_data_v1 *sd = (struct stat_data_v1 *)item;
+
+		printk("\t0%-6o | %6u | %2u | %d | %s\n", sd_v1_mode(sd),
+		       sd_v1_size(sd), sd_v1_nlink(sd),
+		       sd_v1_first_direct_byte(sd),
+		       print_time(sd_v1_mtime(sd)));
+	} else {
+		struct stat_data *sd = (struct stat_data *)item;
+
+		printk("\t0%-6o | %6Lu | %2u | %d | %s\n", sd_v2_mode(sd),
+		       (unsigned long long)sd_v2_size(sd), sd_v2_nlink(sd),
+		       sd_v2_rdev(sd), print_time(sd_v2_mtime(sd)));
+	}
+}
+
+static void sd_check_item(struct item_head *ih, char *item)
+{
+	// FIXME: type something here!
+}
+
+static int sd_create_vi(struct virtual_node *vn,
+			struct virtual_item *vi,
+			int is_affected, int insert_size)
+{
+	vi->vi_index = TYPE_STAT_DATA;
+	//vi->vi_type |= VI_TYPE_STAT_DATA;// not needed?
+	return 0;
+}
+
+static int sd_check_left(struct virtual_item *vi, int free,
+			 int start_skip, int end_skip)
+{
+	BUG_ON(start_skip || end_skip);
+	return -1;
+}
+
+static int sd_check_right(struct virtual_item *vi, int free)
+{
+	return -1;
+}
+
+static int sd_part_size(struct virtual_item *vi, int first, int count)
+{
+	BUG_ON(count);
+	return 0;
+}
+
+static int sd_unit_num(struct virtual_item *vi)
+{
+	return vi->vi_item_len - IH_SIZE;
+}
+
+static void sd_print_vi(struct virtual_item *vi)
+{
+	reiserfs_warning(NULL, "STATDATA, index %d, type 0x%x, %h",
+			 vi->vi_index, vi->vi_type, vi->vi_ih);
+}
+
+static struct item_operations stat_data_ops = {
+	.bytes_number = sd_bytes_number,
+	.decrement_key = sd_decrement_key,
+	.is_left_mergeable = sd_is_left_mergeable,
+	.print_item = sd_print_item,
+	.check_item = sd_check_item,
+
+	.create_vi = sd_create_vi,
+	.check_left = sd_check_left,
+	.check_right = sd_check_right,
+	.part_size = sd_part_size,
+	.unit_num = sd_unit_num,
+	.print_vi = sd_print_vi
+};
+
+//////////////////////////////////////////////////////////////////////////////
+// direct item functions
+//
+static int direct_bytes_number(struct item_head *ih, int block_size)
+{
+	return ih_item_len(ih);
+}
+
+// FIXME: this should probably switch to indirect as well
+static void direct_decrement_key(struct cpu_key *key)
+{
+	cpu_key_k_offset_dec(key);
+	if (cpu_key_k_offset(key) == 0)
+		set_cpu_key_k_type(key, TYPE_STAT_DATA);
+}
+
+static int direct_is_left_mergeable(struct reiserfs_key *key,
+				    unsigned long bsize)
+{
+	int version = le_key_version(key);
+	return ((le_key_k_offset(version, key) & (bsize - 1)) != 1);
+}
+
+static void direct_print_item(struct item_head *ih, char *item)
+{
+	int j = 0;
+
+//    return;
+	printk("\"");
+	while (j < ih_item_len(ih))
+		printk("%c", item[j++]);
+	printk("\"\n");
+}
+
+static void direct_check_item(struct item_head *ih, char *item)
+{
+	// FIXME: type something here!
+}
+
+static int direct_create_vi(struct virtual_node *vn,
+			    struct virtual_item *vi,
+			    int is_affected, int insert_size)
+{
+	vi->vi_index = TYPE_DIRECT;
+	//vi->vi_type |= VI_TYPE_DIRECT;
+	return 0;
+}
+
+static int direct_check_left(struct virtual_item *vi, int free,
+			     int start_skip, int end_skip)
+{
+	int bytes;
+
+	bytes = free - free % 8;
+	return bytes ? : -1;
+}
+
+static int direct_check_right(struct virtual_item *vi, int free)
+{
+	return direct_check_left(vi, free, 0, 0);
+}
+
+static int direct_part_size(struct virtual_item *vi, int first, int count)
+{
+	return count;
+}
+
+static int direct_unit_num(struct virtual_item *vi)
+{
+	return vi->vi_item_len - IH_SIZE;
+}
+
+static void direct_print_vi(struct virtual_item *vi)
+{
+	reiserfs_warning(NULL, "DIRECT, index %d, type 0x%x, %h",
+			 vi->vi_index, vi->vi_type, vi->vi_ih);
+}
+
+static struct item_operations direct_ops = {
+	.bytes_number = direct_bytes_number,
+	.decrement_key = direct_decrement_key,
+	.is_left_mergeable = direct_is_left_mergeable,
+	.print_item = direct_print_item,
+	.check_item = direct_check_item,
+
+	.create_vi = direct_create_vi,
+	.check_left = direct_check_left,
+	.check_right = direct_check_right,
+	.part_size = direct_part_size,
+	.unit_num = direct_unit_num,
+	.print_vi = direct_print_vi
+};
+
+//////////////////////////////////////////////////////////////////////////////
+// indirect item functions
+//
+
+static int indirect_bytes_number(struct item_head *ih, int block_size)
+{
+	return ih_item_len(ih) / UNFM_P_SIZE * block_size;	//- get_ih_free_space (ih);
+}
+
+// decrease offset, if it becomes 0, change type to stat data
+static void indirect_decrement_key(struct cpu_key *key)
+{
+	cpu_key_k_offset_dec(key);
+	if (cpu_key_k_offset(key) == 0)
+		set_cpu_key_k_type(key, TYPE_STAT_DATA);
+}
+
+// if it is not first item of the body, then it is mergeable
+static int indirect_is_left_mergeable(struct reiserfs_key *key,
+				      unsigned long bsize)
+{
+	int version = le_key_version(key);
+	return (le_key_k_offset(version, key) != 1);
+}
+
+// printing of indirect item
+static void start_new_sequence(__u32 * start, int *len, __u32 new)
+{
+	*start = new;
+	*len = 1;
+}
+
+static int sequence_finished(__u32 start, int *len, __u32 new)
+{
+	if (start == INT_MAX)
+		return 1;
+
+	if (start == 0 && new == 0) {
+		(*len)++;
+		return 0;
+	}
+	if (start != 0 && (start + *len) == new) {
+		(*len)++;
+		return 0;
+	}
+	return 1;
+}
+
+static void print_sequence(__u32 start, int len)
+{
+	if (start == INT_MAX)
+		return;
+
+	if (len == 1)
+		printk(" %d", start);
+	else
+		printk(" %d(%d)", start, len);
+}
+
+static void indirect_print_item(struct item_head *ih, char *item)
+{
+	int j;
+	__le32 *unp;
+	__u32 prev = INT_MAX;
+	int num = 0;
+
+	unp = (__le32 *) item;
+
+	if (ih_item_len(ih) % UNFM_P_SIZE)
+		reiserfs_warning(NULL, "indirect_print_item: invalid item len");
+
+	printk("%d pointers\n[ ", (int)I_UNFM_NUM(ih));
+	for (j = 0; j < I_UNFM_NUM(ih); j++) {
+		if (sequence_finished(prev, &num, get_block_num(unp, j))) {
+			print_sequence(prev, num);
+			start_new_sequence(&prev, &num, get_block_num(unp, j));
+		}
+	}
+	print_sequence(prev, num);
+	printk("]\n");
+}
+
+static void indirect_check_item(struct item_head *ih, char *item)
+{
+	// FIXME: type something here!
+}
+
+static int indirect_create_vi(struct virtual_node *vn,
+			      struct virtual_item *vi,
+			      int is_affected, int insert_size)
+{
+	vi->vi_index = TYPE_INDIRECT;
+	//vi->vi_type |= VI_TYPE_INDIRECT;
+	return 0;
+}
+
+static int indirect_check_left(struct virtual_item *vi, int free,
+			       int start_skip, int end_skip)
+{
+	int bytes;
+
+	bytes = free - free % UNFM_P_SIZE;
+	return bytes ? : -1;
+}
+
+static int indirect_check_right(struct virtual_item *vi, int free)
+{
+	return indirect_check_left(vi, free, 0, 0);
+}
+
+// return size in bytes of 'units' units. If first == 0 - calculate from the head (left), otherwise - from tail (right)
+static int indirect_part_size(struct virtual_item *vi, int first, int units)
+{
+	// unit of indirect item is byte (yet)
+	return units;
+}
+
+static int indirect_unit_num(struct virtual_item *vi)
+{
+	// unit of indirect item is byte (yet)
+	return vi->vi_item_len - IH_SIZE;
+}
+
+static void indirect_print_vi(struct virtual_item *vi)
+{
+	reiserfs_warning(NULL, "INDIRECT, index %d, type 0x%x, %h",
+			 vi->vi_index, vi->vi_type, vi->vi_ih);
+}
+
+static struct item_operations indirect_ops = {
+	.bytes_number = indirect_bytes_number,
+	.decrement_key = indirect_decrement_key,
+	.is_left_mergeable = indirect_is_left_mergeable,
+	.print_item = indirect_print_item,
+	.check_item = indirect_check_item,
+
+	.create_vi = indirect_create_vi,
+	.check_left = indirect_check_left,
+	.check_right = indirect_check_right,
+	.part_size = indirect_part_size,
+	.unit_num = indirect_unit_num,
+	.print_vi = indirect_print_vi
+};
+
+//////////////////////////////////////////////////////////////////////////////
+// direntry functions
+//
+
+static int direntry_bytes_number(struct item_head *ih, int block_size)
+{
+	reiserfs_warning(NULL, "vs-16090: direntry_bytes_number: "
+			 "bytes number is asked for direntry");
+	return 0;
+}
+
+static void direntry_decrement_key(struct cpu_key *key)
+{
+	cpu_key_k_offset_dec(key);
+	if (cpu_key_k_offset(key) == 0)
+		set_cpu_key_k_type(key, TYPE_STAT_DATA);
+}
+
+static int direntry_is_left_mergeable(struct reiserfs_key *key,
+				      unsigned long bsize)
+{
+	if (le32_to_cpu(key->u.k_offset_v1.k_offset) == DOT_OFFSET)
+		return 0;
+	return 1;
+
+}
+
+static void direntry_print_item(struct item_head *ih, char *item)
+{
+	int i;
+	int namelen;
+	struct reiserfs_de_head *deh;
+	char *name;
+	static char namebuf[80];
+
+	printk("\n # %-15s%-30s%-15s%-15s%-15s\n", "Name",
+	       "Key of pointed object", "Hash", "Gen number", "Status");
+
+	deh = (struct reiserfs_de_head *)item;
+
+	for (i = 0; i < I_ENTRY_COUNT(ih); i++, deh++) {
+		namelen =
+		    (i ? (deh_location(deh - 1)) : ih_item_len(ih)) -
+		    deh_location(deh);
+		name = item + deh_location(deh);
+		if (name[namelen - 1] == 0)
+			namelen = strlen(name);
+		namebuf[0] = '"';
+		if (namelen > sizeof(namebuf) - 3) {
+			strncpy(namebuf + 1, name, sizeof(namebuf) - 3);
+			namebuf[sizeof(namebuf) - 2] = '"';
+			namebuf[sizeof(namebuf) - 1] = 0;
+		} else {
+			memcpy(namebuf + 1, name, namelen);
+			namebuf[namelen + 1] = '"';
+			namebuf[namelen + 2] = 0;
+		}
+
+		printk("%d:  %-15s%-15d%-15d%-15Ld%-15Ld(%s)\n",
+		       i, namebuf,
+		       deh_dir_id(deh), deh_objectid(deh),
+		       GET_HASH_VALUE(deh_offset(deh)),
+		       GET_GENERATION_NUMBER((deh_offset(deh))),
+		       (de_hidden(deh)) ? "HIDDEN" : "VISIBLE");
+	}
+}
+
+static void direntry_check_item(struct item_head *ih, char *item)
+{
+	int i;
+	struct reiserfs_de_head *deh;
+
+	// FIXME: type something here!
+	deh = (struct reiserfs_de_head *)item;
+	for (i = 0; i < I_ENTRY_COUNT(ih); i++, deh++) {
+		;
+	}
+}
+
+#define DIRENTRY_VI_FIRST_DIRENTRY_ITEM 1
+
+/*
+ * function returns old entry number in directory item in real node
+ * using new entry number in virtual item in virtual node */
+static inline int old_entry_num(int is_affected, int virtual_entry_num,
+				int pos_in_item, int mode)
+{
+	if (mode == M_INSERT || mode == M_DELETE)
+		return virtual_entry_num;
+
+	if (!is_affected)
+		/* cut or paste is applied to another item */
+		return virtual_entry_num;
+
+	if (virtual_entry_num < pos_in_item)
+		return virtual_entry_num;
+
+	if (mode == M_CUT)
+		return virtual_entry_num + 1;
+
+	RFALSE(mode != M_PASTE || virtual_entry_num == 0,
+	       "vs-8015: old_entry_num: mode must be M_PASTE (mode = \'%c\'",
+	       mode);
+
+	return virtual_entry_num - 1;
+}
+
+/* Create an array of sizes of directory entries for virtual
+   item. Return space used by an item. FIXME: no control over
+   consuming of space used by this item handler */
+static int direntry_create_vi(struct virtual_node *vn,
+			      struct virtual_item *vi,
+			      int is_affected, int insert_size)
+{
+	struct direntry_uarea *dir_u = vi->vi_uarea;
+	int i, j;
+	int size = sizeof(struct direntry_uarea);
+	struct reiserfs_de_head *deh;
+
+	vi->vi_index = TYPE_DIRENTRY;
+
+	BUG_ON(!(vi->vi_ih) || !vi->vi_item);
+
+	dir_u->flags = 0;
+	if (le_ih_k_offset(vi->vi_ih) == DOT_OFFSET)
+		dir_u->flags |= DIRENTRY_VI_FIRST_DIRENTRY_ITEM;
+
+	deh = (struct reiserfs_de_head *)(vi->vi_item);
+
+	/* virtual directory item have this amount of entry after */
+	dir_u->entry_count = ih_entry_count(vi->vi_ih) +
+	    ((is_affected) ? ((vn->vn_mode == M_CUT) ? -1 :
+			      (vn->vn_mode == M_PASTE ? 1 : 0)) : 0);
+
+	for (i = 0; i < dir_u->entry_count; i++) {
+		j = old_entry_num(is_affected, i, vn->vn_pos_in_item,
+				  vn->vn_mode);
+		dir_u->entry_sizes[i] =
+		    (j ? deh_location(&(deh[j - 1])) : ih_item_len(vi->vi_ih)) -
+		    deh_location(&(deh[j])) + DEH_SIZE;
+	}
+
+	size += (dir_u->entry_count * sizeof(short));
+
+	/* set size of pasted entry */
+	if (is_affected && vn->vn_mode == M_PASTE)
+		dir_u->entry_sizes[vn->vn_pos_in_item] = insert_size;
+
+#ifdef CONFIG_REISERFS_CHECK
+	/* compare total size of entries with item length */
+	{
+		int k, l;
+
+		l = 0;
+		for (k = 0; k < dir_u->entry_count; k++)
+			l += dir_u->entry_sizes[k];
+
+		if (l + IH_SIZE != vi->vi_item_len +
+		    ((is_affected
+		      && (vn->vn_mode == M_PASTE
+			  || vn->vn_mode == M_CUT)) ? insert_size : 0)) {
+			reiserfs_panic(NULL,
+				       "vs-8025: set_entry_sizes: (mode==%c, insert_size==%d), invalid length of directory item",
+				       vn->vn_mode, insert_size);
+		}
+	}
+#endif
+
+	return size;
+
+}
+
+//
+// return number of entries which may fit into specified amount of
+// free space, or -1 if free space is not enough even for 1 entry
+//
+static int direntry_check_left(struct virtual_item *vi, int free,
+			       int start_skip, int end_skip)
+{
+	int i;
+	int entries = 0;
+	struct direntry_uarea *dir_u = vi->vi_uarea;
+
+	for (i = start_skip; i < dir_u->entry_count - end_skip; i++) {
+		if (dir_u->entry_sizes[i] > free)
+			/* i-th entry doesn't fit into the remaining free space */
+			break;
+
+		free -= dir_u->entry_sizes[i];
+		entries++;
+	}
+
+	if (entries == dir_u->entry_count) {
+		reiserfs_panic(NULL, "free space %d, entry_count %d\n", free,
+			       dir_u->entry_count);
+	}
+
+	/* "." and ".." can not be separated from each other */
+	if (start_skip == 0 && (dir_u->flags & DIRENTRY_VI_FIRST_DIRENTRY_ITEM)
+	    && entries < 2)
+		entries = 0;
+
+	return entries ? : -1;
+}
+
+static int direntry_check_right(struct virtual_item *vi, int free)
+{
+	int i;
+	int entries = 0;
+	struct direntry_uarea *dir_u = vi->vi_uarea;
+
+	for (i = dir_u->entry_count - 1; i >= 0; i--) {
+		if (dir_u->entry_sizes[i] > free)
+			/* i-th entry doesn't fit into the remaining free space */
+			break;
+
+		free -= dir_u->entry_sizes[i];
+		entries++;
+	}
+	BUG_ON(entries == dir_u->entry_count);
+
+	/* "." and ".." can not be separated from each other */
+	if ((dir_u->flags & DIRENTRY_VI_FIRST_DIRENTRY_ITEM)
+	    && entries > dir_u->entry_count - 2)
+		entries = dir_u->entry_count - 2;
+
+	return entries ? : -1;
+}
+
+/* sum of entry sizes between from-th and to-th entries including both edges */
+static int direntry_part_size(struct virtual_item *vi, int first, int count)
+{
+	int i, retval;
+	int from, to;
+	struct direntry_uarea *dir_u = vi->vi_uarea;
+
+	retval = 0;
+	if (first == 0)
+		from = 0;
+	else
+		from = dir_u->entry_count - count;
+	to = from + count - 1;
+
+	for (i = from; i <= to; i++)
+		retval += dir_u->entry_sizes[i];
+
+	return retval;
+}
+
+static int direntry_unit_num(struct virtual_item *vi)
+{
+	struct direntry_uarea *dir_u = vi->vi_uarea;
+
+	return dir_u->entry_count;
+}
+
+static void direntry_print_vi(struct virtual_item *vi)
+{
+	int i;
+	struct direntry_uarea *dir_u = vi->vi_uarea;
+
+	reiserfs_warning(NULL, "DIRENTRY, index %d, type 0x%x, %h, flags 0x%x",
+			 vi->vi_index, vi->vi_type, vi->vi_ih, dir_u->flags);
+	printk("%d entries: ", dir_u->entry_count);
+	for (i = 0; i < dir_u->entry_count; i++)
+		printk("%d ", dir_u->entry_sizes[i]);
+	printk("\n");
+}
+
+static struct item_operations direntry_ops = {
+	.bytes_number = direntry_bytes_number,
+	.decrement_key = direntry_decrement_key,
+	.is_left_mergeable = direntry_is_left_mergeable,
+	.print_item = direntry_print_item,
+	.check_item = direntry_check_item,
+
+	.create_vi = direntry_create_vi,
+	.check_left = direntry_check_left,
+	.check_right = direntry_check_right,
+	.part_size = direntry_part_size,
+	.unit_num = direntry_unit_num,
+	.print_vi = direntry_print_vi
+};
+
+//////////////////////////////////////////////////////////////////////////////
+// Error catching functions to catch errors caused by incorrect item types.
+//
+static int errcatch_bytes_number(struct item_head *ih, int block_size)
+{
+	reiserfs_warning(NULL,
+			 "green-16001: Invalid item type observed, run fsck ASAP");
+	return 0;
+}
+
+static void errcatch_decrement_key(struct cpu_key *key)
+{
+	reiserfs_warning(NULL,
+			 "green-16002: Invalid item type observed, run fsck ASAP");
+}
+
+static int errcatch_is_left_mergeable(struct reiserfs_key *key,
+				      unsigned long bsize)
+{
+	reiserfs_warning(NULL,
+			 "green-16003: Invalid item type observed, run fsck ASAP");
+	return 0;
+}
+
+static void errcatch_print_item(struct item_head *ih, char *item)
+{
+	reiserfs_warning(NULL,
+			 "green-16004: Invalid item type observed, run fsck ASAP");
+}
+
+static void errcatch_check_item(struct item_head *ih, char *item)
+{
+	reiserfs_warning(NULL,
+			 "green-16005: Invalid item type observed, run fsck ASAP");
+}
+
+static int errcatch_create_vi(struct virtual_node *vn,
+			      struct virtual_item *vi,
+			      int is_affected, int insert_size)
+{
+	reiserfs_warning(NULL,
+			 "green-16006: Invalid item type observed, run fsck ASAP");
+	return 0;		// We might return -1 here as well, but it won't help as create_virtual_node() from where
+	// this operation is called from is of return type void.
+}
+
+static int errcatch_check_left(struct virtual_item *vi, int free,
+			       int start_skip, int end_skip)
+{
+	reiserfs_warning(NULL,
+			 "green-16007: Invalid item type observed, run fsck ASAP");
+	return -1;
+}
+
+static int errcatch_check_right(struct virtual_item *vi, int free)
+{
+	reiserfs_warning(NULL,
+			 "green-16008: Invalid item type observed, run fsck ASAP");
+	return -1;
+}
+
+static int errcatch_part_size(struct virtual_item *vi, int first, int count)
+{
+	reiserfs_warning(NULL,
+			 "green-16009: Invalid item type observed, run fsck ASAP");
+	return 0;
+}
+
+static int errcatch_unit_num(struct virtual_item *vi)
+{
+	reiserfs_warning(NULL,
+			 "green-16010: Invalid item type observed, run fsck ASAP");
+	return 0;
+}
+
+static void errcatch_print_vi(struct virtual_item *vi)
+{
+	reiserfs_warning(NULL,
+			 "green-16011: Invalid item type observed, run fsck ASAP");
+}
+
+static struct item_operations errcatch_ops = {
+	errcatch_bytes_number,
+	errcatch_decrement_key,
+	errcatch_is_left_mergeable,
+	errcatch_print_item,
+	errcatch_check_item,
+
+	errcatch_create_vi,
+	errcatch_check_left,
+	errcatch_check_right,
+	errcatch_part_size,
+	errcatch_unit_num,
+	errcatch_print_vi
+};
+
+//////////////////////////////////////////////////////////////////////////////
+//
+//
+#if ! (TYPE_STAT_DATA == 0 && TYPE_INDIRECT == 1 && TYPE_DIRECT == 2 && TYPE_DIRENTRY == 3)
+#error Item types must use disk-format assigned values.
+#endif
+
+struct item_operations *item_ops[TYPE_ANY + 1] = {
+	&stat_data_ops,
+	&indirect_ops,
+	&direct_ops,
+	&direntry_ops,
+	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+	&errcatch_ops		/* This is to catch errors with invalid type (15th entry for TYPE_ANY) */
+};
diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
new file mode 100644
index 0000000..9643c3b
--- /dev/null
+++ b/fs/reiserfs/journal.c
@@ -0,0 +1,4317 @@
+/*
+** Write ahead logging implementation copyright Chris Mason 2000
+**
+** The background commits make this code very interelated, and 
+** overly complex.  I need to rethink things a bit....The major players:
+**
+** journal_begin -- call with the number of blocks you expect to log.  
+**                  If the current transaction is too
+** 		    old, it will block until the current transaction is 
+** 		    finished, and then start a new one.
+**		    Usually, your transaction will get joined in with 
+**                  previous ones for speed.
+**
+** journal_join  -- same as journal_begin, but won't block on the current 
+**                  transaction regardless of age.  Don't ever call
+**                  this.  Ever.  There are only two places it should be 
+**                  called from, and they are both inside this file.
+**
+** journal_mark_dirty -- adds blocks into this transaction.  clears any flags 
+**                       that might make them get sent to disk
+**                       and then marks them BH_JDirty.  Puts the buffer head 
+**                       into the current transaction hash.  
+**
+** journal_end -- if the current transaction is batchable, it does nothing
+**                   otherwise, it could do an async/synchronous commit, or
+**                   a full flush of all log and real blocks in the 
+**                   transaction.
+**
+** flush_old_commits -- if the current transaction is too old, it is ended and 
+**                      commit blocks are sent to disk.  Forces commit blocks 
+**                      to disk for all backgrounded commits that have been 
+**                      around too long.
+**		     -- Note, if you call this as an immediate flush from 
+**		        from within kupdate, it will ignore the immediate flag
+*/
+
+#include <linux/time.h>
+#include <linux/semaphore.h>
+#include <linux/vmalloc.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/fcntl.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <linux/smp_lock.h>
+#include <linux/buffer_head.h>
+#include <linux/workqueue.h>
+#include <linux/writeback.h>
+#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
+#include <linux/uaccess.h>
+
+#include <asm/system.h>
+
+/* gets a struct reiserfs_journal_list * from a list head */
+#define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
+                               j_list))
+#define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
+                               j_working_list))
+
+/* the number of mounted filesystems.  This is used to decide when to
+** start and kill the commit workqueue
+*/
+static int reiserfs_mounted_fs_count;
+
+static struct workqueue_struct *commit_wq;
+
+#define JOURNAL_TRANS_HALF 1018	/* must be correct to keep the desc and commit
+				   structs at 4k */
+#define BUFNR 64		/*read ahead */
+
+/* cnode stat bits.  Move these into reiserfs_fs.h */
+
+#define BLOCK_FREED 2		/* this block was freed, and can't be written.  */
+#define BLOCK_FREED_HOLDER 3	/* this block was freed during this transaction, and can't be written */
+
+#define BLOCK_NEEDS_FLUSH 4	/* used in flush_journal_list */
+#define BLOCK_DIRTIED 5
+
+/* journal list state bits */
+#define LIST_TOUCHED 1
+#define LIST_DIRTY   2
+#define LIST_COMMIT_PENDING  4	/* someone will commit this list */
+
+/* flags for do_journal_end */
+#define FLUSH_ALL   1		/* flush commit and real blocks */
+#define COMMIT_NOW  2		/* end and commit this transaction */
+#define WAIT        4		/* wait for the log blocks to hit the disk */
+
+static int do_journal_end(struct reiserfs_transaction_handle *,
+			  struct super_block *, unsigned long nblocks,
+			  int flags);
+static int flush_journal_list(struct super_block *s,
+			      struct reiserfs_journal_list *jl, int flushall);
+static int flush_commit_list(struct super_block *s,
+			     struct reiserfs_journal_list *jl, int flushall);
+static int can_dirty(struct reiserfs_journal_cnode *cn);
+static int journal_join(struct reiserfs_transaction_handle *th,
+			struct super_block *p_s_sb, unsigned long nblocks);
+static int release_journal_dev(struct super_block *super,
+			       struct reiserfs_journal *journal);
+static int dirty_one_transaction(struct super_block *s,
+				 struct reiserfs_journal_list *jl);
+static void flush_async_commits(struct work_struct *work);
+static void queue_log_writer(struct super_block *s);
+
+/* values for join in do_journal_begin_r */
+enum {
+	JBEGIN_REG = 0,		/* regular journal begin */
+	JBEGIN_JOIN = 1,	/* join the running transaction if at all possible */
+	JBEGIN_ABORT = 2,	/* called from cleanup code, ignores aborted flag */
+};
+
+static int do_journal_begin_r(struct reiserfs_transaction_handle *th,
+			      struct super_block *p_s_sb,
+			      unsigned long nblocks, int join);
+
+static void init_journal_hash(struct super_block *p_s_sb)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	memset(journal->j_hash_table, 0,
+	       JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *));
+}
+
+/*
+** clears BH_Dirty and sticks the buffer on the clean list.  Called because I can't allow refile_buffer to
+** make schedule happen after I've freed a block.  Look at remove_from_transaction and journal_mark_freed for
+** more details.
+*/
+static int reiserfs_clean_and_file_buffer(struct buffer_head *bh)
+{
+	if (bh) {
+		clear_buffer_dirty(bh);
+		clear_buffer_journal_test(bh);
+	}
+	return 0;
+}
+
+static void disable_barrier(struct super_block *s)
+{
+	REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_BARRIER_FLUSH);
+	printk("reiserfs: disabling flush barriers on %s\n",
+	       reiserfs_bdevname(s));
+}
+
+static struct reiserfs_bitmap_node *allocate_bitmap_node(struct super_block
+							 *p_s_sb)
+{
+	struct reiserfs_bitmap_node *bn;
+	static int id;
+
+	bn = kmalloc(sizeof(struct reiserfs_bitmap_node), GFP_NOFS);
+	if (!bn) {
+		return NULL;
+	}
+	bn->data = kzalloc(p_s_sb->s_blocksize, GFP_NOFS);
+	if (!bn->data) {
+		kfree(bn);
+		return NULL;
+	}
+	bn->id = id++;
+	INIT_LIST_HEAD(&bn->list);
+	return bn;
+}
+
+static struct reiserfs_bitmap_node *get_bitmap_node(struct super_block *p_s_sb)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	struct reiserfs_bitmap_node *bn = NULL;
+	struct list_head *entry = journal->j_bitmap_nodes.next;
+
+	journal->j_used_bitmap_nodes++;
+      repeat:
+
+	if (entry != &journal->j_bitmap_nodes) {
+		bn = list_entry(entry, struct reiserfs_bitmap_node, list);
+		list_del(entry);
+		memset(bn->data, 0, p_s_sb->s_blocksize);
+		journal->j_free_bitmap_nodes--;
+		return bn;
+	}
+	bn = allocate_bitmap_node(p_s_sb);
+	if (!bn) {
+		yield();
+		goto repeat;
+	}
+	return bn;
+}
+static inline void free_bitmap_node(struct super_block *p_s_sb,
+				    struct reiserfs_bitmap_node *bn)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	journal->j_used_bitmap_nodes--;
+	if (journal->j_free_bitmap_nodes > REISERFS_MAX_BITMAP_NODES) {
+		kfree(bn->data);
+		kfree(bn);
+	} else {
+		list_add(&bn->list, &journal->j_bitmap_nodes);
+		journal->j_free_bitmap_nodes++;
+	}
+}
+
+static void allocate_bitmap_nodes(struct super_block *p_s_sb)
+{
+	int i;
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	struct reiserfs_bitmap_node *bn = NULL;
+	for (i = 0; i < REISERFS_MIN_BITMAP_NODES; i++) {
+		bn = allocate_bitmap_node(p_s_sb);
+		if (bn) {
+			list_add(&bn->list, &journal->j_bitmap_nodes);
+			journal->j_free_bitmap_nodes++;
+		} else {
+			break;	// this is ok, we'll try again when more are needed 
+		}
+	}
+}
+
+static int set_bit_in_list_bitmap(struct super_block *p_s_sb,
+				  b_blocknr_t block,
+				  struct reiserfs_list_bitmap *jb)
+{
+	unsigned int bmap_nr = block / (p_s_sb->s_blocksize << 3);
+	unsigned int bit_nr = block % (p_s_sb->s_blocksize << 3);
+
+	if (!jb->bitmaps[bmap_nr]) {
+		jb->bitmaps[bmap_nr] = get_bitmap_node(p_s_sb);
+	}
+	set_bit(bit_nr, (unsigned long *)jb->bitmaps[bmap_nr]->data);
+	return 0;
+}
+
+static void cleanup_bitmap_list(struct super_block *p_s_sb,
+				struct reiserfs_list_bitmap *jb)
+{
+	int i;
+	if (jb->bitmaps == NULL)
+		return;
+
+	for (i = 0; i < reiserfs_bmap_count(p_s_sb); i++) {
+		if (jb->bitmaps[i]) {
+			free_bitmap_node(p_s_sb, jb->bitmaps[i]);
+			jb->bitmaps[i] = NULL;
+		}
+	}
+}
+
+/*
+** only call this on FS unmount.
+*/
+static int free_list_bitmaps(struct super_block *p_s_sb,
+			     struct reiserfs_list_bitmap *jb_array)
+{
+	int i;
+	struct reiserfs_list_bitmap *jb;
+	for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) {
+		jb = jb_array + i;
+		jb->journal_list = NULL;
+		cleanup_bitmap_list(p_s_sb, jb);
+		vfree(jb->bitmaps);
+		jb->bitmaps = NULL;
+	}
+	return 0;
+}
+
+static int free_bitmap_nodes(struct super_block *p_s_sb)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	struct list_head *next = journal->j_bitmap_nodes.next;
+	struct reiserfs_bitmap_node *bn;
+
+	while (next != &journal->j_bitmap_nodes) {
+		bn = list_entry(next, struct reiserfs_bitmap_node, list);
+		list_del(next);
+		kfree(bn->data);
+		kfree(bn);
+		next = journal->j_bitmap_nodes.next;
+		journal->j_free_bitmap_nodes--;
+	}
+
+	return 0;
+}
+
+/*
+** get memory for JOURNAL_NUM_BITMAPS worth of bitmaps. 
+** jb_array is the array to be filled in.
+*/
+int reiserfs_allocate_list_bitmaps(struct super_block *p_s_sb,
+				   struct reiserfs_list_bitmap *jb_array,
+				   unsigned int bmap_nr)
+{
+	int i;
+	int failed = 0;
+	struct reiserfs_list_bitmap *jb;
+	int mem = bmap_nr * sizeof(struct reiserfs_bitmap_node *);
+
+	for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) {
+		jb = jb_array + i;
+		jb->journal_list = NULL;
+		jb->bitmaps = vmalloc(mem);
+		if (!jb->bitmaps) {
+			reiserfs_warning(p_s_sb,
+					 "clm-2000, unable to allocate bitmaps for journal lists");
+			failed = 1;
+			break;
+		}
+		memset(jb->bitmaps, 0, mem);
+	}
+	if (failed) {
+		free_list_bitmaps(p_s_sb, jb_array);
+		return -1;
+	}
+	return 0;
+}
+
+/*
+** find an available list bitmap.  If you can't find one, flush a commit list 
+** and try again
+*/
+static struct reiserfs_list_bitmap *get_list_bitmap(struct super_block *p_s_sb,
+						    struct reiserfs_journal_list
+						    *jl)
+{
+	int i, j;
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	struct reiserfs_list_bitmap *jb = NULL;
+
+	for (j = 0; j < (JOURNAL_NUM_BITMAPS * 3); j++) {
+		i = journal->j_list_bitmap_index;
+		journal->j_list_bitmap_index = (i + 1) % JOURNAL_NUM_BITMAPS;
+		jb = journal->j_list_bitmap + i;
+		if (journal->j_list_bitmap[i].journal_list) {
+			flush_commit_list(p_s_sb,
+					  journal->j_list_bitmap[i].
+					  journal_list, 1);
+			if (!journal->j_list_bitmap[i].journal_list) {
+				break;
+			}
+		} else {
+			break;
+		}
+	}
+	if (jb->journal_list) {	/* double check to make sure if flushed correctly */
+		return NULL;
+	}
+	jb->journal_list = jl;
+	return jb;
+}
+
+/* 
+** allocates a new chunk of X nodes, and links them all together as a list.
+** Uses the cnode->next and cnode->prev pointers
+** returns NULL on failure
+*/
+static struct reiserfs_journal_cnode *allocate_cnodes(int num_cnodes)
+{
+	struct reiserfs_journal_cnode *head;
+	int i;
+	if (num_cnodes <= 0) {
+		return NULL;
+	}
+	head = vmalloc(num_cnodes * sizeof(struct reiserfs_journal_cnode));
+	if (!head) {
+		return NULL;
+	}
+	memset(head, 0, num_cnodes * sizeof(struct reiserfs_journal_cnode));
+	head[0].prev = NULL;
+	head[0].next = head + 1;
+	for (i = 1; i < num_cnodes; i++) {
+		head[i].prev = head + (i - 1);
+		head[i].next = head + (i + 1);	/* if last one, overwrite it after the if */
+	}
+	head[num_cnodes - 1].next = NULL;
+	return head;
+}
+
+/*
+** pulls a cnode off the free list, or returns NULL on failure 
+*/
+static struct reiserfs_journal_cnode *get_cnode(struct super_block *p_s_sb)
+{
+	struct reiserfs_journal_cnode *cn;
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+
+	reiserfs_check_lock_depth(p_s_sb, "get_cnode");
+
+	if (journal->j_cnode_free <= 0) {
+		return NULL;
+	}
+	journal->j_cnode_used++;
+	journal->j_cnode_free--;
+	cn = journal->j_cnode_free_list;
+	if (!cn) {
+		return cn;
+	}
+	if (cn->next) {
+		cn->next->prev = NULL;
+	}
+	journal->j_cnode_free_list = cn->next;
+	memset(cn, 0, sizeof(struct reiserfs_journal_cnode));
+	return cn;
+}
+
+/*
+** returns a cnode to the free list 
+*/
+static void free_cnode(struct super_block *p_s_sb,
+		       struct reiserfs_journal_cnode *cn)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+
+	reiserfs_check_lock_depth(p_s_sb, "free_cnode");
+
+	journal->j_cnode_used--;
+	journal->j_cnode_free++;
+	/* memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; */
+	cn->next = journal->j_cnode_free_list;
+	if (journal->j_cnode_free_list) {
+		journal->j_cnode_free_list->prev = cn;
+	}
+	cn->prev = NULL;	/* not needed with the memset, but I might kill the memset, and forget to do this */
+	journal->j_cnode_free_list = cn;
+}
+
+static void clear_prepared_bits(struct buffer_head *bh)
+{
+	clear_buffer_journal_prepared(bh);
+	clear_buffer_journal_restore_dirty(bh);
+}
+
+/* utility function to force a BUG if it is called without the big
+** kernel lock held.  caller is the string printed just before calling BUG()
+*/
+void reiserfs_check_lock_depth(struct super_block *sb, char *caller)
+{
+#ifdef CONFIG_SMP
+	if (current->lock_depth < 0) {
+		reiserfs_panic(sb, "%s called without kernel lock held",
+			       caller);
+	}
+#else
+	;
+#endif
+}
+
+/* return a cnode with same dev, block number and size in table, or null if not found */
+static inline struct reiserfs_journal_cnode *get_journal_hash_dev(struct
+								  super_block
+								  *sb,
+								  struct
+								  reiserfs_journal_cnode
+								  **table,
+								  long bl)
+{
+	struct reiserfs_journal_cnode *cn;
+	cn = journal_hash(table, sb, bl);
+	while (cn) {
+		if (cn->blocknr == bl && cn->sb == sb)
+			return cn;
+		cn = cn->hnext;
+	}
+	return (struct reiserfs_journal_cnode *)0;
+}
+
+/*
+** this actually means 'can this block be reallocated yet?'.  If you set search_all, a block can only be allocated
+** if it is not in the current transaction, was not freed by the current transaction, and has no chance of ever
+** being overwritten by a replay after crashing.
+**
+** If you don't set search_all, a block can only be allocated if it is not in the current transaction.  Since deleting
+** a block removes it from the current transaction, this case should never happen.  If you don't set search_all, make
+** sure you never write the block without logging it.
+**
+** next_zero_bit is a suggestion about the next block to try for find_forward.
+** when bl is rejected because it is set in a journal list bitmap, we search
+** for the next zero bit in the bitmap that rejected bl.  Then, we return that
+** through next_zero_bit for find_forward to try.
+**
+** Just because we return something in next_zero_bit does not mean we won't
+** reject it on the next call to reiserfs_in_journal
+**
+*/
+int reiserfs_in_journal(struct super_block *p_s_sb,
+			unsigned int bmap_nr, int bit_nr, int search_all,
+			b_blocknr_t * next_zero_bit)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	struct reiserfs_journal_cnode *cn;
+	struct reiserfs_list_bitmap *jb;
+	int i;
+	unsigned long bl;
+
+	*next_zero_bit = 0;	/* always start this at zero. */
+
+	PROC_INFO_INC(p_s_sb, journal.in_journal);
+	/* If we aren't doing a search_all, this is a metablock, and it will be logged before use.
+	 ** if we crash before the transaction that freed it commits,  this transaction won't
+	 ** have committed either, and the block will never be written
+	 */
+	if (search_all) {
+		for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) {
+			PROC_INFO_INC(p_s_sb, journal.in_journal_bitmap);
+			jb = journal->j_list_bitmap + i;
+			if (jb->journal_list && jb->bitmaps[bmap_nr] &&
+			    test_bit(bit_nr,
+				     (unsigned long *)jb->bitmaps[bmap_nr]->
+				     data)) {
+				*next_zero_bit =
+				    find_next_zero_bit((unsigned long *)
+						       (jb->bitmaps[bmap_nr]->
+							data),
+						       p_s_sb->s_blocksize << 3,
+						       bit_nr + 1);
+				return 1;
+			}
+		}
+	}
+
+	bl = bmap_nr * (p_s_sb->s_blocksize << 3) + bit_nr;
+	/* is it in any old transactions? */
+	if (search_all
+	    && (cn =
+		get_journal_hash_dev(p_s_sb, journal->j_list_hash_table, bl))) {
+		return 1;
+	}
+
+	/* is it in the current transaction.  This should never happen */
+	if ((cn = get_journal_hash_dev(p_s_sb, journal->j_hash_table, bl))) {
+		BUG();
+		return 1;
+	}
+
+	PROC_INFO_INC(p_s_sb, journal.in_journal_reusable);
+	/* safe for reuse */
+	return 0;
+}
+
+/* insert cn into table
+*/
+static inline void insert_journal_hash(struct reiserfs_journal_cnode **table,
+				       struct reiserfs_journal_cnode *cn)
+{
+	struct reiserfs_journal_cnode *cn_orig;
+
+	cn_orig = journal_hash(table, cn->sb, cn->blocknr);
+	cn->hnext = cn_orig;
+	cn->hprev = NULL;
+	if (cn_orig) {
+		cn_orig->hprev = cn;
+	}
+	journal_hash(table, cn->sb, cn->blocknr) = cn;
+}
+
+/* lock the current transaction */
+static inline void lock_journal(struct super_block *p_s_sb)
+{
+	PROC_INFO_INC(p_s_sb, journal.lock_journal);
+	mutex_lock(&SB_JOURNAL(p_s_sb)->j_mutex);
+}
+
+/* unlock the current transaction */
+static inline void unlock_journal(struct super_block *p_s_sb)
+{
+	mutex_unlock(&SB_JOURNAL(p_s_sb)->j_mutex);
+}
+
+static inline void get_journal_list(struct reiserfs_journal_list *jl)
+{
+	jl->j_refcount++;
+}
+
+static inline void put_journal_list(struct super_block *s,
+				    struct reiserfs_journal_list *jl)
+{
+	if (jl->j_refcount < 1) {
+		reiserfs_panic(s, "trans id %lu, refcount at %d",
+			       jl->j_trans_id, jl->j_refcount);
+	}
+	if (--jl->j_refcount == 0)
+		kfree(jl);
+}
+
+/*
+** this used to be much more involved, and I'm keeping it just in case things get ugly again.
+** it gets called by flush_commit_list, and cleans up any data stored about blocks freed during a
+** transaction.
+*/
+static void cleanup_freed_for_journal_list(struct super_block *p_s_sb,
+					   struct reiserfs_journal_list *jl)
+{
+
+	struct reiserfs_list_bitmap *jb = jl->j_list_bitmap;
+	if (jb) {
+		cleanup_bitmap_list(p_s_sb, jb);
+	}
+	jl->j_list_bitmap->journal_list = NULL;
+	jl->j_list_bitmap = NULL;
+}
+
+static int journal_list_still_alive(struct super_block *s,
+				    unsigned long trans_id)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(s);
+	struct list_head *entry = &journal->j_journal_list;
+	struct reiserfs_journal_list *jl;
+
+	if (!list_empty(entry)) {
+		jl = JOURNAL_LIST_ENTRY(entry->next);
+		if (jl->j_trans_id <= trans_id) {
+			return 1;
+		}
+	}
+	return 0;
+}
+
+/*
+ * If page->mapping was null, we failed to truncate this page for
+ * some reason.  Most likely because it was truncated after being
+ * logged via data=journal.
+ *
+ * This does a check to see if the buffer belongs to one of these
+ * lost pages before doing the final put_bh.  If page->mapping was
+ * null, it tries to free buffers on the page, which should make the
+ * final page_cache_release drop the page from the lru.
+ */
+static void release_buffer_page(struct buffer_head *bh)
+{
+	struct page *page = bh->b_page;
+	if (!page->mapping && trylock_page(page)) {
+		page_cache_get(page);
+		put_bh(bh);
+		if (!page->mapping)
+			try_to_free_buffers(page);
+		unlock_page(page);
+		page_cache_release(page);
+	} else {
+		put_bh(bh);
+	}
+}
+
+static void reiserfs_end_buffer_io_sync(struct buffer_head *bh, int uptodate)
+{
+	char b[BDEVNAME_SIZE];
+
+	if (buffer_journaled(bh)) {
+		reiserfs_warning(NULL,
+				 "clm-2084: pinned buffer %lu:%s sent to disk",
+				 bh->b_blocknr, bdevname(bh->b_bdev, b));
+	}
+	if (uptodate)
+		set_buffer_uptodate(bh);
+	else
+		clear_buffer_uptodate(bh);
+
+	unlock_buffer(bh);
+	release_buffer_page(bh);
+}
+
+static void reiserfs_end_ordered_io(struct buffer_head *bh, int uptodate)
+{
+	if (uptodate)
+		set_buffer_uptodate(bh);
+	else
+		clear_buffer_uptodate(bh);
+	unlock_buffer(bh);
+	put_bh(bh);
+}
+
+static void submit_logged_buffer(struct buffer_head *bh)
+{
+	get_bh(bh);
+	bh->b_end_io = reiserfs_end_buffer_io_sync;
+	clear_buffer_journal_new(bh);
+	clear_buffer_dirty(bh);
+	if (!test_clear_buffer_journal_test(bh))
+		BUG();
+	if (!buffer_uptodate(bh))
+		BUG();
+	submit_bh(WRITE, bh);
+}
+
+static void submit_ordered_buffer(struct buffer_head *bh)
+{
+	get_bh(bh);
+	bh->b_end_io = reiserfs_end_ordered_io;
+	clear_buffer_dirty(bh);
+	if (!buffer_uptodate(bh))
+		BUG();
+	submit_bh(WRITE, bh);
+}
+
+static int submit_barrier_buffer(struct buffer_head *bh)
+{
+	get_bh(bh);
+	bh->b_end_io = reiserfs_end_ordered_io;
+	clear_buffer_dirty(bh);
+	if (!buffer_uptodate(bh))
+		BUG();
+	return submit_bh(WRITE_BARRIER, bh);
+}
+
+static void check_barrier_completion(struct super_block *s,
+				     struct buffer_head *bh)
+{
+	if (buffer_eopnotsupp(bh)) {
+		clear_buffer_eopnotsupp(bh);
+		disable_barrier(s);
+		set_buffer_uptodate(bh);
+		set_buffer_dirty(bh);
+		sync_dirty_buffer(bh);
+	}
+}
+
+#define CHUNK_SIZE 32
+struct buffer_chunk {
+	struct buffer_head *bh[CHUNK_SIZE];
+	int nr;
+};
+
+static void write_chunk(struct buffer_chunk *chunk)
+{
+	int i;
+	get_fs_excl();
+	for (i = 0; i < chunk->nr; i++) {
+		submit_logged_buffer(chunk->bh[i]);
+	}
+	chunk->nr = 0;
+	put_fs_excl();
+}
+
+static void write_ordered_chunk(struct buffer_chunk *chunk)
+{
+	int i;
+	get_fs_excl();
+	for (i = 0; i < chunk->nr; i++) {
+		submit_ordered_buffer(chunk->bh[i]);
+	}
+	chunk->nr = 0;
+	put_fs_excl();
+}
+
+static int add_to_chunk(struct buffer_chunk *chunk, struct buffer_head *bh,
+			spinlock_t * lock, void (fn) (struct buffer_chunk *))
+{
+	int ret = 0;
+	BUG_ON(chunk->nr >= CHUNK_SIZE);
+	chunk->bh[chunk->nr++] = bh;
+	if (chunk->nr >= CHUNK_SIZE) {
+		ret = 1;
+		if (lock)
+			spin_unlock(lock);
+		fn(chunk);
+		if (lock)
+			spin_lock(lock);
+	}
+	return ret;
+}
+
+static atomic_t nr_reiserfs_jh = ATOMIC_INIT(0);
+static struct reiserfs_jh *alloc_jh(void)
+{
+	struct reiserfs_jh *jh;
+	while (1) {
+		jh = kmalloc(sizeof(*jh), GFP_NOFS);
+		if (jh) {
+			atomic_inc(&nr_reiserfs_jh);
+			return jh;
+		}
+		yield();
+	}
+}
+
+/*
+ * we want to free the jh when the buffer has been written
+ * and waited on
+ */
+void reiserfs_free_jh(struct buffer_head *bh)
+{
+	struct reiserfs_jh *jh;
+
+	jh = bh->b_private;
+	if (jh) {
+		bh->b_private = NULL;
+		jh->bh = NULL;
+		list_del_init(&jh->list);
+		kfree(jh);
+		if (atomic_read(&nr_reiserfs_jh) <= 0)
+			BUG();
+		atomic_dec(&nr_reiserfs_jh);
+		put_bh(bh);
+	}
+}
+
+static inline int __add_jh(struct reiserfs_journal *j, struct buffer_head *bh,
+			   int tail)
+{
+	struct reiserfs_jh *jh;
+
+	if (bh->b_private) {
+		spin_lock(&j->j_dirty_buffers_lock);
+		if (!bh->b_private) {
+			spin_unlock(&j->j_dirty_buffers_lock);
+			goto no_jh;
+		}
+		jh = bh->b_private;
+		list_del_init(&jh->list);
+	} else {
+	      no_jh:
+		get_bh(bh);
+		jh = alloc_jh();
+		spin_lock(&j->j_dirty_buffers_lock);
+		/* buffer must be locked for __add_jh, should be able to have
+		 * two adds at the same time
+		 */
+		BUG_ON(bh->b_private);
+		jh->bh = bh;
+		bh->b_private = jh;
+	}
+	jh->jl = j->j_current_jl;
+	if (tail)
+		list_add_tail(&jh->list, &jh->jl->j_tail_bh_list);
+	else {
+		list_add_tail(&jh->list, &jh->jl->j_bh_list);
+	}
+	spin_unlock(&j->j_dirty_buffers_lock);
+	return 0;
+}
+
+int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh)
+{
+	return __add_jh(SB_JOURNAL(inode->i_sb), bh, 1);
+}
+int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh)
+{
+	return __add_jh(SB_JOURNAL(inode->i_sb), bh, 0);
+}
+
+#define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list)
+static int write_ordered_buffers(spinlock_t * lock,
+				 struct reiserfs_journal *j,
+				 struct reiserfs_journal_list *jl,
+				 struct list_head *list)
+{
+	struct buffer_head *bh;
+	struct reiserfs_jh *jh;
+	int ret = j->j_errno;
+	struct buffer_chunk chunk;
+	struct list_head tmp;
+	INIT_LIST_HEAD(&tmp);
+
+	chunk.nr = 0;
+	spin_lock(lock);
+	while (!list_empty(list)) {
+		jh = JH_ENTRY(list->next);
+		bh = jh->bh;
+		get_bh(bh);
+		if (!trylock_buffer(bh)) {
+			if (!buffer_dirty(bh)) {
+				list_move(&jh->list, &tmp);
+				goto loop_next;
+			}
+			spin_unlock(lock);
+			if (chunk.nr)
+				write_ordered_chunk(&chunk);
+			wait_on_buffer(bh);
+			cond_resched();
+			spin_lock(lock);
+			goto loop_next;
+		}
+		/* in theory, dirty non-uptodate buffers should never get here,
+		 * but the upper layer io error paths still have a few quirks.
+		 * Handle them here as gracefully as we can
+		 */
+		if (!buffer_uptodate(bh) && buffer_dirty(bh)) {
+			clear_buffer_dirty(bh);
+			ret = -EIO;
+		}
+		if (buffer_dirty(bh)) {
+			list_move(&jh->list, &tmp);
+			add_to_chunk(&chunk, bh, lock, write_ordered_chunk);
+		} else {
+			reiserfs_free_jh(bh);
+			unlock_buffer(bh);
+		}
+	      loop_next:
+		put_bh(bh);
+		cond_resched_lock(lock);
+	}
+	if (chunk.nr) {
+		spin_unlock(lock);
+		write_ordered_chunk(&chunk);
+		spin_lock(lock);
+	}
+	while (!list_empty(&tmp)) {
+		jh = JH_ENTRY(tmp.prev);
+		bh = jh->bh;
+		get_bh(bh);
+		reiserfs_free_jh(bh);
+
+		if (buffer_locked(bh)) {
+			spin_unlock(lock);
+			wait_on_buffer(bh);
+			spin_lock(lock);
+		}
+		if (!buffer_uptodate(bh)) {
+			ret = -EIO;
+		}
+		/* ugly interaction with invalidatepage here.
+		 * reiserfs_invalidate_page will pin any buffer that has a valid
+		 * journal head from an older transaction.  If someone else sets
+		 * our buffer dirty after we write it in the first loop, and
+		 * then someone truncates the page away, nobody will ever write
+		 * the buffer. We're safe if we write the page one last time
+		 * after freeing the journal header.
+		 */
+		if (buffer_dirty(bh) && unlikely(bh->b_page->mapping == NULL)) {
+			spin_unlock(lock);
+			ll_rw_block(WRITE, 1, &bh);
+			spin_lock(lock);
+		}
+		put_bh(bh);
+		cond_resched_lock(lock);
+	}
+	spin_unlock(lock);
+	return ret;
+}
+
+static int flush_older_commits(struct super_block *s,
+			       struct reiserfs_journal_list *jl)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(s);
+	struct reiserfs_journal_list *other_jl;
+	struct reiserfs_journal_list *first_jl;
+	struct list_head *entry;
+	unsigned long trans_id = jl->j_trans_id;
+	unsigned long other_trans_id;
+	unsigned long first_trans_id;
+
+      find_first:
+	/*
+	 * first we walk backwards to find the oldest uncommitted transation
+	 */
+	first_jl = jl;
+	entry = jl->j_list.prev;
+	while (1) {
+		other_jl = JOURNAL_LIST_ENTRY(entry);
+		if (entry == &journal->j_journal_list ||
+		    atomic_read(&other_jl->j_older_commits_done))
+			break;
+
+		first_jl = other_jl;
+		entry = other_jl->j_list.prev;
+	}
+
+	/* if we didn't find any older uncommitted transactions, return now */
+	if (first_jl == jl) {
+		return 0;
+	}
+
+	first_trans_id = first_jl->j_trans_id;
+
+	entry = &first_jl->j_list;
+	while (1) {
+		other_jl = JOURNAL_LIST_ENTRY(entry);
+		other_trans_id = other_jl->j_trans_id;
+
+		if (other_trans_id < trans_id) {
+			if (atomic_read(&other_jl->j_commit_left) != 0) {
+				flush_commit_list(s, other_jl, 0);
+
+				/* list we were called with is gone, return */
+				if (!journal_list_still_alive(s, trans_id))
+					return 1;
+
+				/* the one we just flushed is gone, this means all
+				 * older lists are also gone, so first_jl is no longer
+				 * valid either.  Go back to the beginning.
+				 */
+				if (!journal_list_still_alive
+				    (s, other_trans_id)) {
+					goto find_first;
+				}
+			}
+			entry = entry->next;
+			if (entry == &journal->j_journal_list)
+				return 0;
+		} else {
+			return 0;
+		}
+	}
+	return 0;
+}
+
+static int reiserfs_async_progress_wait(struct super_block *s)
+{
+	DEFINE_WAIT(wait);
+	struct reiserfs_journal *j = SB_JOURNAL(s);
+	if (atomic_read(&j->j_async_throttle))
+		congestion_wait(WRITE, HZ / 10);
+	return 0;
+}
+
+/*
+** if this journal list still has commit blocks unflushed, send them to disk.
+**
+** log areas must be flushed in order (transaction 2 can't commit before transaction 1)
+** Before the commit block can by written, every other log block must be safely on disk
+**
+*/
+static int flush_commit_list(struct super_block *s,
+			     struct reiserfs_journal_list *jl, int flushall)
+{
+	int i;
+	b_blocknr_t bn;
+	struct buffer_head *tbh = NULL;
+	unsigned long trans_id = jl->j_trans_id;
+	struct reiserfs_journal *journal = SB_JOURNAL(s);
+	int barrier = 0;
+	int retval = 0;
+	int write_len;
+
+	reiserfs_check_lock_depth(s, "flush_commit_list");
+
+	if (atomic_read(&jl->j_older_commits_done)) {
+		return 0;
+	}
+
+	get_fs_excl();
+
+	/* before we can put our commit blocks on disk, we have to make sure everyone older than
+	 ** us is on disk too
+	 */
+	BUG_ON(jl->j_len <= 0);
+	BUG_ON(trans_id == journal->j_trans_id);
+
+	get_journal_list(jl);
+	if (flushall) {
+		if (flush_older_commits(s, jl) == 1) {
+			/* list disappeared during flush_older_commits.  return */
+			goto put_jl;
+		}
+	}
+
+	/* make sure nobody is trying to flush this one at the same time */
+	mutex_lock(&jl->j_commit_mutex);
+	if (!journal_list_still_alive(s, trans_id)) {
+		mutex_unlock(&jl->j_commit_mutex);
+		goto put_jl;
+	}
+	BUG_ON(jl->j_trans_id == 0);
+
+	/* this commit is done, exit */
+	if (atomic_read(&(jl->j_commit_left)) <= 0) {
+		if (flushall) {
+			atomic_set(&(jl->j_older_commits_done), 1);
+		}
+		mutex_unlock(&jl->j_commit_mutex);
+		goto put_jl;
+	}
+
+	if (!list_empty(&jl->j_bh_list)) {
+		int ret;
+		unlock_kernel();
+		ret = write_ordered_buffers(&journal->j_dirty_buffers_lock,
+					    journal, jl, &jl->j_bh_list);
+		if (ret < 0 && retval == 0)
+			retval = ret;
+		lock_kernel();
+	}
+	BUG_ON(!list_empty(&jl->j_bh_list));
+	/*
+	 * for the description block and all the log blocks, submit any buffers
+	 * that haven't already reached the disk.  Try to write at least 256
+	 * log blocks. later on, we will only wait on blocks that correspond
+	 * to this transaction, but while we're unplugging we might as well
+	 * get a chunk of data on there.
+	 */
+	atomic_inc(&journal->j_async_throttle);
+	write_len = jl->j_len + 1;
+	if (write_len < 256)
+		write_len = 256;
+	for (i = 0 ; i < write_len ; i++) {
+		bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + (jl->j_start + i) %
+		    SB_ONDISK_JOURNAL_SIZE(s);
+		tbh = journal_find_get_block(s, bn);
+		if (tbh) {
+			if (buffer_dirty(tbh))
+			    ll_rw_block(WRITE, 1, &tbh) ;
+			put_bh(tbh) ;
+		}
+	}
+	atomic_dec(&journal->j_async_throttle);
+
+	/* We're skipping the commit if there's an error */
+	if (retval || reiserfs_is_journal_aborted(journal))
+		barrier = 0;
+
+	/* wait on everything written so far before writing the commit
+	 * if we are in barrier mode, send the commit down now
+	 */
+	barrier = reiserfs_barrier_flush(s);
+	if (barrier) {
+		int ret;
+		lock_buffer(jl->j_commit_bh);
+		ret = submit_barrier_buffer(jl->j_commit_bh);
+		if (ret == -EOPNOTSUPP) {
+			set_buffer_uptodate(jl->j_commit_bh);
+			disable_barrier(s);
+			barrier = 0;
+		}
+	}
+	for (i = 0; i < (jl->j_len + 1); i++) {
+		bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) +
+		    (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s);
+		tbh = journal_find_get_block(s, bn);
+		wait_on_buffer(tbh);
+		// since we're using ll_rw_blk above, it might have skipped over
+		// a locked buffer.  Double check here
+		//
+		if (buffer_dirty(tbh))	/* redundant, sync_dirty_buffer() checks */
+			sync_dirty_buffer(tbh);
+		if (unlikely(!buffer_uptodate(tbh))) {
+#ifdef CONFIG_REISERFS_CHECK
+			reiserfs_warning(s, "journal-601, buffer write failed");
+#endif
+			retval = -EIO;
+		}
+		put_bh(tbh);	/* once for journal_find_get_block */
+		put_bh(tbh);	/* once due to original getblk in do_journal_end */
+		atomic_dec(&(jl->j_commit_left));
+	}
+
+	BUG_ON(atomic_read(&(jl->j_commit_left)) != 1);
+
+	if (!barrier) {
+		/* If there was a write error in the journal - we can't commit
+		 * this transaction - it will be invalid and, if successful,
+		 * will just end up propagating the write error out to
+		 * the file system. */
+		if (likely(!retval && !reiserfs_is_journal_aborted (journal))) {
+			if (buffer_dirty(jl->j_commit_bh))
+				BUG();
+			mark_buffer_dirty(jl->j_commit_bh) ;
+			sync_dirty_buffer(jl->j_commit_bh) ;
+		}
+	} else
+		wait_on_buffer(jl->j_commit_bh);
+
+	check_barrier_completion(s, jl->j_commit_bh);
+
+	/* If there was a write error in the journal - we can't commit this
+	 * transaction - it will be invalid and, if successful, will just end
+	 * up propagating the write error out to the filesystem. */
+	if (unlikely(!buffer_uptodate(jl->j_commit_bh))) {
+#ifdef CONFIG_REISERFS_CHECK
+		reiserfs_warning(s, "journal-615: buffer write failed");
+#endif
+		retval = -EIO;
+	}
+	bforget(jl->j_commit_bh);
+	if (journal->j_last_commit_id != 0 &&
+	    (jl->j_trans_id - journal->j_last_commit_id) != 1) {
+		reiserfs_warning(s, "clm-2200: last commit %lu, current %lu",
+				 journal->j_last_commit_id, jl->j_trans_id);
+	}
+	journal->j_last_commit_id = jl->j_trans_id;
+
+	/* now, every commit block is on the disk.  It is safe to allow blocks freed during this transaction to be reallocated */
+	cleanup_freed_for_journal_list(s, jl);
+
+	retval = retval ? retval : journal->j_errno;
+
+	/* mark the metadata dirty */
+	if (!retval)
+		dirty_one_transaction(s, jl);
+	atomic_dec(&(jl->j_commit_left));
+
+	if (flushall) {
+		atomic_set(&(jl->j_older_commits_done), 1);
+	}
+	mutex_unlock(&jl->j_commit_mutex);
+      put_jl:
+	put_journal_list(s, jl);
+
+	if (retval)
+		reiserfs_abort(s, retval, "Journal write error in %s",
+			       __func__);
+	put_fs_excl();
+	return retval;
+}
+
+/*
+** flush_journal_list frequently needs to find a newer transaction for a given block.  This does that, or 
+** returns NULL if it can't find anything 
+*/
+static struct reiserfs_journal_list *find_newer_jl_for_cn(struct
+							  reiserfs_journal_cnode
+							  *cn)
+{
+	struct super_block *sb = cn->sb;
+	b_blocknr_t blocknr = cn->blocknr;
+
+	cn = cn->hprev;
+	while (cn) {
+		if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist) {
+			return cn->jlist;
+		}
+		cn = cn->hprev;
+	}
+	return NULL;
+}
+
+static int newer_jl_done(struct reiserfs_journal_cnode *cn)
+{
+	struct super_block *sb = cn->sb;
+	b_blocknr_t blocknr = cn->blocknr;
+
+	cn = cn->hprev;
+	while (cn) {
+		if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist &&
+		    atomic_read(&cn->jlist->j_commit_left) != 0)
+				    return 0;
+		cn = cn->hprev;
+	}
+	return 1;
+}
+
+static void remove_journal_hash(struct super_block *,
+				struct reiserfs_journal_cnode **,
+				struct reiserfs_journal_list *, unsigned long,
+				int);
+
+/*
+** once all the real blocks have been flushed, it is safe to remove them from the
+** journal list for this transaction.  Aside from freeing the cnode, this also allows the
+** block to be reallocated for data blocks if it had been deleted.
+*/
+static void remove_all_from_journal_list(struct super_block *p_s_sb,
+					 struct reiserfs_journal_list *jl,
+					 int debug)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	struct reiserfs_journal_cnode *cn, *last;
+	cn = jl->j_realblock;
+
+	/* which is better, to lock once around the whole loop, or
+	 ** to lock for each call to remove_journal_hash?
+	 */
+	while (cn) {
+		if (cn->blocknr != 0) {
+			if (debug) {
+				reiserfs_warning(p_s_sb,
+						 "block %u, bh is %d, state %ld",
+						 cn->blocknr, cn->bh ? 1 : 0,
+						 cn->state);
+			}
+			cn->state = 0;
+			remove_journal_hash(p_s_sb, journal->j_list_hash_table,
+					    jl, cn->blocknr, 1);
+		}
+		last = cn;
+		cn = cn->next;
+		free_cnode(p_s_sb, last);
+	}
+	jl->j_realblock = NULL;
+}
+
+/*
+** if this timestamp is greater than the timestamp we wrote last to the header block, write it to the header block.
+** once this is done, I can safely say the log area for this transaction won't ever be replayed, and I can start
+** releasing blocks in this transaction for reuse as data blocks.
+** called by flush_journal_list, before it calls remove_all_from_journal_list
+**
+*/
+static int _update_journal_header_block(struct super_block *p_s_sb,
+					unsigned long offset,
+					unsigned long trans_id)
+{
+	struct reiserfs_journal_header *jh;
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+
+	if (reiserfs_is_journal_aborted(journal))
+		return -EIO;
+
+	if (trans_id >= journal->j_last_flush_trans_id) {
+		if (buffer_locked((journal->j_header_bh))) {
+			wait_on_buffer((journal->j_header_bh));
+			if (unlikely(!buffer_uptodate(journal->j_header_bh))) {
+#ifdef CONFIG_REISERFS_CHECK
+				reiserfs_warning(p_s_sb,
+						 "journal-699: buffer write failed");
+#endif
+				return -EIO;
+			}
+		}
+		journal->j_last_flush_trans_id = trans_id;
+		journal->j_first_unflushed_offset = offset;
+		jh = (struct reiserfs_journal_header *)(journal->j_header_bh->
+							b_data);
+		jh->j_last_flush_trans_id = cpu_to_le32(trans_id);
+		jh->j_first_unflushed_offset = cpu_to_le32(offset);
+		jh->j_mount_id = cpu_to_le32(journal->j_mount_id);
+
+		if (reiserfs_barrier_flush(p_s_sb)) {
+			int ret;
+			lock_buffer(journal->j_header_bh);
+			ret = submit_barrier_buffer(journal->j_header_bh);
+			if (ret == -EOPNOTSUPP) {
+				set_buffer_uptodate(journal->j_header_bh);
+				disable_barrier(p_s_sb);
+				goto sync;
+			}
+			wait_on_buffer(journal->j_header_bh);
+			check_barrier_completion(p_s_sb, journal->j_header_bh);
+		} else {
+		      sync:
+			set_buffer_dirty(journal->j_header_bh);
+			sync_dirty_buffer(journal->j_header_bh);
+		}
+		if (!buffer_uptodate(journal->j_header_bh)) {
+			reiserfs_warning(p_s_sb,
+					 "journal-837: IO error during journal replay");
+			return -EIO;
+		}
+	}
+	return 0;
+}
+
+static int update_journal_header_block(struct super_block *p_s_sb,
+				       unsigned long offset,
+				       unsigned long trans_id)
+{
+	return _update_journal_header_block(p_s_sb, offset, trans_id);
+}
+
+/* 
+** flush any and all journal lists older than you are 
+** can only be called from flush_journal_list
+*/
+static int flush_older_journal_lists(struct super_block *p_s_sb,
+				     struct reiserfs_journal_list *jl)
+{
+	struct list_head *entry;
+	struct reiserfs_journal_list *other_jl;
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	unsigned long trans_id = jl->j_trans_id;
+
+	/* we know we are the only ones flushing things, no extra race
+	 * protection is required.
+	 */
+      restart:
+	entry = journal->j_journal_list.next;
+	/* Did we wrap? */
+	if (entry == &journal->j_journal_list)
+		return 0;
+	other_jl = JOURNAL_LIST_ENTRY(entry);
+	if (other_jl->j_trans_id < trans_id) {
+		BUG_ON(other_jl->j_refcount <= 0);
+		/* do not flush all */
+		flush_journal_list(p_s_sb, other_jl, 0);
+
+		/* other_jl is now deleted from the list */
+		goto restart;
+	}
+	return 0;
+}
+
+static void del_from_work_list(struct super_block *s,
+			       struct reiserfs_journal_list *jl)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(s);
+	if (!list_empty(&jl->j_working_list)) {
+		list_del_init(&jl->j_working_list);
+		journal->j_num_work_lists--;
+	}
+}
+
+/* flush a journal list, both commit and real blocks
+**
+** always set flushall to 1, unless you are calling from inside
+** flush_journal_list
+**
+** IMPORTANT.  This can only be called while there are no journal writers, 
+** and the journal is locked.  That means it can only be called from 
+** do_journal_end, or by journal_release
+*/
+static int flush_journal_list(struct super_block *s,
+			      struct reiserfs_journal_list *jl, int flushall)
+{
+	struct reiserfs_journal_list *pjl;
+	struct reiserfs_journal_cnode *cn, *last;
+	int count;
+	int was_jwait = 0;
+	int was_dirty = 0;
+	struct buffer_head *saved_bh;
+	unsigned long j_len_saved = jl->j_len;
+	struct reiserfs_journal *journal = SB_JOURNAL(s);
+	int err = 0;
+
+	BUG_ON(j_len_saved <= 0);
+
+	if (atomic_read(&journal->j_wcount) != 0) {
+		reiserfs_warning(s,
+				 "clm-2048: flush_journal_list called with wcount %d",
+				 atomic_read(&journal->j_wcount));
+	}
+	BUG_ON(jl->j_trans_id == 0);
+
+	/* if flushall == 0, the lock is already held */
+	if (flushall) {
+		mutex_lock(&journal->j_flush_mutex);
+	} else if (mutex_trylock(&journal->j_flush_mutex)) {
+		BUG();
+	}
+
+	count = 0;
+	if (j_len_saved > journal->j_trans_max) {
+		reiserfs_panic(s,
+			       "journal-715: flush_journal_list, length is %lu, trans id %lu\n",
+			       j_len_saved, jl->j_trans_id);
+		return 0;
+	}
+
+	get_fs_excl();
+
+	/* if all the work is already done, get out of here */
+	if (atomic_read(&(jl->j_nonzerolen)) <= 0 &&
+	    atomic_read(&(jl->j_commit_left)) <= 0) {
+		goto flush_older_and_return;
+	}
+
+	/* start by putting the commit list on disk.  This will also flush 
+	 ** the commit lists of any olders transactions
+	 */
+	flush_commit_list(s, jl, 1);
+
+	if (!(jl->j_state & LIST_DIRTY)
+	    && !reiserfs_is_journal_aborted(journal))
+		BUG();
+
+	/* are we done now? */
+	if (atomic_read(&(jl->j_nonzerolen)) <= 0 &&
+	    atomic_read(&(jl->j_commit_left)) <= 0) {
+		goto flush_older_and_return;
+	}
+
+	/* loop through each cnode, see if we need to write it, 
+	 ** or wait on a more recent transaction, or just ignore it 
+	 */
+	if (atomic_read(&(journal->j_wcount)) != 0) {
+		reiserfs_panic(s,
+			       "journal-844: panic journal list is flushing, wcount is not 0\n");
+	}
+	cn = jl->j_realblock;
+	while (cn) {
+		was_jwait = 0;
+		was_dirty = 0;
+		saved_bh = NULL;
+		/* blocknr of 0 is no longer in the hash, ignore it */
+		if (cn->blocknr == 0) {
+			goto free_cnode;
+		}
+
+		/* This transaction failed commit. Don't write out to the disk */
+		if (!(jl->j_state & LIST_DIRTY))
+			goto free_cnode;
+
+		pjl = find_newer_jl_for_cn(cn);
+		/* the order is important here.  We check pjl to make sure we
+		 ** don't clear BH_JDirty_wait if we aren't the one writing this
+		 ** block to disk
+		 */
+		if (!pjl && cn->bh) {
+			saved_bh = cn->bh;
+
+			/* we do this to make sure nobody releases the buffer while 
+			 ** we are working with it 
+			 */
+			get_bh(saved_bh);
+
+			if (buffer_journal_dirty(saved_bh)) {
+				BUG_ON(!can_dirty(cn));
+				was_jwait = 1;
+				was_dirty = 1;
+			} else if (can_dirty(cn)) {
+				/* everything with !pjl && jwait should be writable */
+				BUG();
+			}
+		}
+
+		/* if someone has this block in a newer transaction, just make
+		 ** sure they are committed, and don't try writing it to disk
+		 */
+		if (pjl) {
+			if (atomic_read(&pjl->j_commit_left))
+				flush_commit_list(s, pjl, 1);
+			goto free_cnode;
+		}
+
+		/* bh == NULL when the block got to disk on its own, OR, 
+		 ** the block got freed in a future transaction 
+		 */
+		if (saved_bh == NULL) {
+			goto free_cnode;
+		}
+
+		/* this should never happen.  kupdate_one_transaction has this list
+		 ** locked while it works, so we should never see a buffer here that
+		 ** is not marked JDirty_wait
+		 */
+		if ((!was_jwait) && !buffer_locked(saved_bh)) {
+			reiserfs_warning(s,
+					 "journal-813: BAD! buffer %llu %cdirty %cjwait, "
+					 "not in a newer tranasction",
+					 (unsigned long long)saved_bh->
+					 b_blocknr, was_dirty ? ' ' : '!',
+					 was_jwait ? ' ' : '!');
+		}
+		if (was_dirty) {
+			/* we inc again because saved_bh gets decremented at free_cnode */
+			get_bh(saved_bh);
+			set_bit(BLOCK_NEEDS_FLUSH, &cn->state);
+			lock_buffer(saved_bh);
+			BUG_ON(cn->blocknr != saved_bh->b_blocknr);
+			if (buffer_dirty(saved_bh))
+				submit_logged_buffer(saved_bh);
+			else
+				unlock_buffer(saved_bh);
+			count++;
+		} else {
+			reiserfs_warning(s,
+					 "clm-2082: Unable to flush buffer %llu in %s",
+					 (unsigned long long)saved_bh->
+					 b_blocknr, __func__);
+		}
+	      free_cnode:
+		last = cn;
+		cn = cn->next;
+		if (saved_bh) {
+			/* we incremented this to keep others from taking the buffer head away */
+			put_bh(saved_bh);
+			if (atomic_read(&(saved_bh->b_count)) < 0) {
+				reiserfs_warning(s,
+						 "journal-945: saved_bh->b_count < 0");
+			}
+		}
+	}
+	if (count > 0) {
+		cn = jl->j_realblock;
+		while (cn) {
+			if (test_bit(BLOCK_NEEDS_FLUSH, &cn->state)) {
+				if (!cn->bh) {
+					reiserfs_panic(s,
+						       "journal-1011: cn->bh is NULL\n");
+				}
+				wait_on_buffer(cn->bh);
+				if (!cn->bh) {
+					reiserfs_panic(s,
+						       "journal-1012: cn->bh is NULL\n");
+				}
+				if (unlikely(!buffer_uptodate(cn->bh))) {
+#ifdef CONFIG_REISERFS_CHECK
+					reiserfs_warning(s,
+							 "journal-949: buffer write failed\n");
+#endif
+					err = -EIO;
+				}
+				/* note, we must clear the JDirty_wait bit after the up to date
+				 ** check, otherwise we race against our flushpage routine
+				 */
+				BUG_ON(!test_clear_buffer_journal_dirty
+				       (cn->bh));
+
+				/* drop one ref for us */
+				put_bh(cn->bh);
+				/* drop one ref for journal_mark_dirty */
+				release_buffer_page(cn->bh);
+			}
+			cn = cn->next;
+		}
+	}
+
+	if (err)
+		reiserfs_abort(s, -EIO,
+			       "Write error while pushing transaction to disk in %s",
+			       __func__);
+      flush_older_and_return:
+
+	/* before we can update the journal header block, we _must_ flush all 
+	 ** real blocks from all older transactions to disk.  This is because
+	 ** once the header block is updated, this transaction will not be
+	 ** replayed after a crash
+	 */
+	if (flushall) {
+		flush_older_journal_lists(s, jl);
+	}
+
+	err = journal->j_errno;
+	/* before we can remove everything from the hash tables for this 
+	 ** transaction, we must make sure it can never be replayed
+	 **
+	 ** since we are only called from do_journal_end, we know for sure there
+	 ** are no allocations going on while we are flushing journal lists.  So,
+	 ** we only need to update the journal header block for the last list
+	 ** being flushed
+	 */
+	if (!err && flushall) {
+		err =
+		    update_journal_header_block(s,
+						(jl->j_start + jl->j_len +
+						 2) % SB_ONDISK_JOURNAL_SIZE(s),
+						jl->j_trans_id);
+		if (err)
+			reiserfs_abort(s, -EIO,
+				       "Write error while updating journal header in %s",
+				       __func__);
+	}
+	remove_all_from_journal_list(s, jl, 0);
+	list_del_init(&jl->j_list);
+	journal->j_num_lists--;
+	del_from_work_list(s, jl);
+
+	if (journal->j_last_flush_id != 0 &&
+	    (jl->j_trans_id - journal->j_last_flush_id) != 1) {
+		reiserfs_warning(s, "clm-2201: last flush %lu, current %lu",
+				 journal->j_last_flush_id, jl->j_trans_id);
+	}
+	journal->j_last_flush_id = jl->j_trans_id;
+
+	/* not strictly required since we are freeing the list, but it should
+	 * help find code using dead lists later on
+	 */
+	jl->j_len = 0;
+	atomic_set(&(jl->j_nonzerolen), 0);
+	jl->j_start = 0;
+	jl->j_realblock = NULL;
+	jl->j_commit_bh = NULL;
+	jl->j_trans_id = 0;
+	jl->j_state = 0;
+	put_journal_list(s, jl);
+	if (flushall)
+		mutex_unlock(&journal->j_flush_mutex);
+	put_fs_excl();
+	return err;
+}
+
+static int test_transaction(struct super_block *s,
+                            struct reiserfs_journal_list *jl)
+{
+	struct reiserfs_journal_cnode *cn;
+
+	if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0)
+		return 1;
+
+	cn = jl->j_realblock;
+	while (cn) {
+		/* if the blocknr == 0, this has been cleared from the hash,
+		 ** skip it
+		 */
+		if (cn->blocknr == 0) {
+			goto next;
+		}
+		if (cn->bh && !newer_jl_done(cn))
+			return 0;
+	      next:
+		cn = cn->next;
+		cond_resched();
+	}
+	return 0;
+}
+
+static int write_one_transaction(struct super_block *s,
+				 struct reiserfs_journal_list *jl,
+				 struct buffer_chunk *chunk)
+{
+	struct reiserfs_journal_cnode *cn;
+	int ret = 0;
+
+	jl->j_state |= LIST_TOUCHED;
+	del_from_work_list(s, jl);
+	if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) {
+		return 0;
+	}
+
+	cn = jl->j_realblock;
+	while (cn) {
+		/* if the blocknr == 0, this has been cleared from the hash,
+		 ** skip it
+		 */
+		if (cn->blocknr == 0) {
+			goto next;
+		}
+		if (cn->bh && can_dirty(cn) && buffer_dirty(cn->bh)) {
+			struct buffer_head *tmp_bh;
+			/* we can race against journal_mark_freed when we try
+			 * to lock_buffer(cn->bh), so we have to inc the buffer
+			 * count, and recheck things after locking
+			 */
+			tmp_bh = cn->bh;
+			get_bh(tmp_bh);
+			lock_buffer(tmp_bh);
+			if (cn->bh && can_dirty(cn) && buffer_dirty(tmp_bh)) {
+				if (!buffer_journal_dirty(tmp_bh) ||
+				    buffer_journal_prepared(tmp_bh))
+					BUG();
+				add_to_chunk(chunk, tmp_bh, NULL, write_chunk);
+				ret++;
+			} else {
+				/* note, cn->bh might be null now */
+				unlock_buffer(tmp_bh);
+			}
+			put_bh(tmp_bh);
+		}
+	      next:
+		cn = cn->next;
+		cond_resched();
+	}
+	return ret;
+}
+
+/* used by flush_commit_list */
+static int dirty_one_transaction(struct super_block *s,
+				 struct reiserfs_journal_list *jl)
+{
+	struct reiserfs_journal_cnode *cn;
+	struct reiserfs_journal_list *pjl;
+	int ret = 0;
+
+	jl->j_state |= LIST_DIRTY;
+	cn = jl->j_realblock;
+	while (cn) {
+		/* look for a more recent transaction that logged this
+		 ** buffer.  Only the most recent transaction with a buffer in
+		 ** it is allowed to send that buffer to disk
+		 */
+		pjl = find_newer_jl_for_cn(cn);
+		if (!pjl && cn->blocknr && cn->bh
+		    && buffer_journal_dirty(cn->bh)) {
+			BUG_ON(!can_dirty(cn));
+			/* if the buffer is prepared, it will either be logged
+			 * or restored.  If restored, we need to make sure
+			 * it actually gets marked dirty
+			 */
+			clear_buffer_journal_new(cn->bh);
+			if (buffer_journal_prepared(cn->bh)) {
+				set_buffer_journal_restore_dirty(cn->bh);
+			} else {
+				set_buffer_journal_test(cn->bh);
+				mark_buffer_dirty(cn->bh);
+			}
+		}
+		cn = cn->next;
+	}
+	return ret;
+}
+
+static int kupdate_transactions(struct super_block *s,
+				struct reiserfs_journal_list *jl,
+				struct reiserfs_journal_list **next_jl,
+				unsigned long *next_trans_id,
+				int num_blocks, int num_trans)
+{
+	int ret = 0;
+	int written = 0;
+	int transactions_flushed = 0;
+	unsigned long orig_trans_id = jl->j_trans_id;
+	struct buffer_chunk chunk;
+	struct list_head *entry;
+	struct reiserfs_journal *journal = SB_JOURNAL(s);
+	chunk.nr = 0;
+
+	mutex_lock(&journal->j_flush_mutex);
+	if (!journal_list_still_alive(s, orig_trans_id)) {
+		goto done;
+	}
+
+	/* we've got j_flush_mutex held, nobody is going to delete any
+	 * of these lists out from underneath us
+	 */
+	while ((num_trans && transactions_flushed < num_trans) ||
+	       (!num_trans && written < num_blocks)) {
+
+		if (jl->j_len == 0 || (jl->j_state & LIST_TOUCHED) ||
+		    atomic_read(&jl->j_commit_left)
+		    || !(jl->j_state & LIST_DIRTY)) {
+			del_from_work_list(s, jl);
+			break;
+		}
+		ret = write_one_transaction(s, jl, &chunk);
+
+		if (ret < 0)
+			goto done;
+		transactions_flushed++;
+		written += ret;
+		entry = jl->j_list.next;
+
+		/* did we wrap? */
+		if (entry == &journal->j_journal_list) {
+			break;
+		}
+		jl = JOURNAL_LIST_ENTRY(entry);
+
+		/* don't bother with older transactions */
+		if (jl->j_trans_id <= orig_trans_id)
+			break;
+	}
+	if (chunk.nr) {
+		write_chunk(&chunk);
+	}
+
+      done:
+	mutex_unlock(&journal->j_flush_mutex);
+	return ret;
+}
+
+/* for o_sync and fsync heavy applications, they tend to use
+** all the journa list slots with tiny transactions.  These
+** trigger lots and lots of calls to update the header block, which
+** adds seeks and slows things down.
+**
+** This function tries to clear out a large chunk of the journal lists
+** at once, which makes everything faster since only the newest journal
+** list updates the header block
+*/
+static int flush_used_journal_lists(struct super_block *s,
+				    struct reiserfs_journal_list *jl)
+{
+	unsigned long len = 0;
+	unsigned long cur_len;
+	int ret;
+	int i;
+	int limit = 256;
+	struct reiserfs_journal_list *tjl;
+	struct reiserfs_journal_list *flush_jl;
+	unsigned long trans_id;
+	struct reiserfs_journal *journal = SB_JOURNAL(s);
+
+	flush_jl = tjl = jl;
+
+	/* in data logging mode, try harder to flush a lot of blocks */
+	if (reiserfs_data_log(s))
+		limit = 1024;
+	/* flush for 256 transactions or limit blocks, whichever comes first */
+	for (i = 0; i < 256 && len < limit; i++) {
+		if (atomic_read(&tjl->j_commit_left) ||
+		    tjl->j_trans_id < jl->j_trans_id) {
+			break;
+		}
+		cur_len = atomic_read(&tjl->j_nonzerolen);
+		if (cur_len > 0) {
+			tjl->j_state &= ~LIST_TOUCHED;
+		}
+		len += cur_len;
+		flush_jl = tjl;
+		if (tjl->j_list.next == &journal->j_journal_list)
+			break;
+		tjl = JOURNAL_LIST_ENTRY(tjl->j_list.next);
+	}
+	/* try to find a group of blocks we can flush across all the
+	 ** transactions, but only bother if we've actually spanned
+	 ** across multiple lists
+	 */
+	if (flush_jl != jl) {
+		ret = kupdate_transactions(s, jl, &tjl, &trans_id, len, i);
+	}
+	flush_journal_list(s, flush_jl, 1);
+	return 0;
+}
+
+/*
+** removes any nodes in table with name block and dev as bh.
+** only touchs the hnext and hprev pointers.
+*/
+void remove_journal_hash(struct super_block *sb,
+			 struct reiserfs_journal_cnode **table,
+			 struct reiserfs_journal_list *jl,
+			 unsigned long block, int remove_freed)
+{
+	struct reiserfs_journal_cnode *cur;
+	struct reiserfs_journal_cnode **head;
+
+	head = &(journal_hash(table, sb, block));
+	if (!head) {
+		return;
+	}
+	cur = *head;
+	while (cur) {
+		if (cur->blocknr == block && cur->sb == sb
+		    && (jl == NULL || jl == cur->jlist)
+		    && (!test_bit(BLOCK_FREED, &cur->state) || remove_freed)) {
+			if (cur->hnext) {
+				cur->hnext->hprev = cur->hprev;
+			}
+			if (cur->hprev) {
+				cur->hprev->hnext = cur->hnext;
+			} else {
+				*head = cur->hnext;
+			}
+			cur->blocknr = 0;
+			cur->sb = NULL;
+			cur->state = 0;
+			if (cur->bh && cur->jlist)	/* anybody who clears the cur->bh will also dec the nonzerolen */
+				atomic_dec(&(cur->jlist->j_nonzerolen));
+			cur->bh = NULL;
+			cur->jlist = NULL;
+		}
+		cur = cur->hnext;
+	}
+}
+
+static void free_journal_ram(struct super_block *p_s_sb)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	kfree(journal->j_current_jl);
+	journal->j_num_lists--;
+
+	vfree(journal->j_cnode_free_orig);
+	free_list_bitmaps(p_s_sb, journal->j_list_bitmap);
+	free_bitmap_nodes(p_s_sb);	/* must be after free_list_bitmaps */
+	if (journal->j_header_bh) {
+		brelse(journal->j_header_bh);
+	}
+	/* j_header_bh is on the journal dev, make sure not to release the journal
+	 * dev until we brelse j_header_bh
+	 */
+	release_journal_dev(p_s_sb, journal);
+	vfree(journal);
+}
+
+/*
+** call on unmount.  Only set error to 1 if you haven't made your way out
+** of read_super() yet.  Any other caller must keep error at 0.
+*/
+static int do_journal_release(struct reiserfs_transaction_handle *th,
+			      struct super_block *p_s_sb, int error)
+{
+	struct reiserfs_transaction_handle myth;
+	int flushed = 0;
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+
+	/* we only want to flush out transactions if we were called with error == 0
+	 */
+	if (!error && !(p_s_sb->s_flags & MS_RDONLY)) {
+		/* end the current trans */
+		BUG_ON(!th->t_trans_id);
+		do_journal_end(th, p_s_sb, 10, FLUSH_ALL);
+
+		/* make sure something gets logged to force our way into the flush code */
+		if (!journal_join(&myth, p_s_sb, 1)) {
+			reiserfs_prepare_for_journal(p_s_sb,
+						     SB_BUFFER_WITH_SB(p_s_sb),
+						     1);
+			journal_mark_dirty(&myth, p_s_sb,
+					   SB_BUFFER_WITH_SB(p_s_sb));
+			do_journal_end(&myth, p_s_sb, 1, FLUSH_ALL);
+			flushed = 1;
+		}
+	}
+
+	/* this also catches errors during the do_journal_end above */
+	if (!error && reiserfs_is_journal_aborted(journal)) {
+		memset(&myth, 0, sizeof(myth));
+		if (!journal_join_abort(&myth, p_s_sb, 1)) {
+			reiserfs_prepare_for_journal(p_s_sb,
+						     SB_BUFFER_WITH_SB(p_s_sb),
+						     1);
+			journal_mark_dirty(&myth, p_s_sb,
+					   SB_BUFFER_WITH_SB(p_s_sb));
+			do_journal_end(&myth, p_s_sb, 1, FLUSH_ALL);
+		}
+	}
+
+	reiserfs_mounted_fs_count--;
+	/* wait for all commits to finish */
+	cancel_delayed_work(&SB_JOURNAL(p_s_sb)->j_work);
+	flush_workqueue(commit_wq);
+	if (!reiserfs_mounted_fs_count) {
+		destroy_workqueue(commit_wq);
+		commit_wq = NULL;
+	}
+
+	free_journal_ram(p_s_sb);
+
+	return 0;
+}
+
+/*
+** call on unmount.  flush all journal trans, release all alloc'd ram
+*/
+int journal_release(struct reiserfs_transaction_handle *th,
+		    struct super_block *p_s_sb)
+{
+	return do_journal_release(th, p_s_sb, 0);
+}
+
+/*
+** only call from an error condition inside reiserfs_read_super!
+*/
+int journal_release_error(struct reiserfs_transaction_handle *th,
+			  struct super_block *p_s_sb)
+{
+	return do_journal_release(th, p_s_sb, 1);
+}
+
+/* compares description block with commit block.  returns 1 if they differ, 0 if they are the same */
+static int journal_compare_desc_commit(struct super_block *p_s_sb,
+				       struct reiserfs_journal_desc *desc,
+				       struct reiserfs_journal_commit *commit)
+{
+	if (get_commit_trans_id(commit) != get_desc_trans_id(desc) ||
+	    get_commit_trans_len(commit) != get_desc_trans_len(desc) ||
+	    get_commit_trans_len(commit) > SB_JOURNAL(p_s_sb)->j_trans_max ||
+	    get_commit_trans_len(commit) <= 0) {
+		return 1;
+	}
+	return 0;
+}
+
+/* returns 0 if it did not find a description block  
+** returns -1 if it found a corrupt commit block
+** returns 1 if both desc and commit were valid 
+*/
+static int journal_transaction_is_valid(struct super_block *p_s_sb,
+					struct buffer_head *d_bh,
+					unsigned long *oldest_invalid_trans_id,
+					unsigned long *newest_mount_id)
+{
+	struct reiserfs_journal_desc *desc;
+	struct reiserfs_journal_commit *commit;
+	struct buffer_head *c_bh;
+	unsigned long offset;
+
+	if (!d_bh)
+		return 0;
+
+	desc = (struct reiserfs_journal_desc *)d_bh->b_data;
+	if (get_desc_trans_len(desc) > 0
+	    && !memcmp(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8)) {
+		if (oldest_invalid_trans_id && *oldest_invalid_trans_id
+		    && get_desc_trans_id(desc) > *oldest_invalid_trans_id) {
+			reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE,
+				       "journal-986: transaction "
+				       "is valid returning because trans_id %d is greater than "
+				       "oldest_invalid %lu",
+				       get_desc_trans_id(desc),
+				       *oldest_invalid_trans_id);
+			return 0;
+		}
+		if (newest_mount_id
+		    && *newest_mount_id > get_desc_mount_id(desc)) {
+			reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE,
+				       "journal-1087: transaction "
+				       "is valid returning because mount_id %d is less than "
+				       "newest_mount_id %lu",
+				       get_desc_mount_id(desc),
+				       *newest_mount_id);
+			return -1;
+		}
+		if (get_desc_trans_len(desc) > SB_JOURNAL(p_s_sb)->j_trans_max) {
+			reiserfs_warning(p_s_sb,
+					 "journal-2018: Bad transaction length %d encountered, ignoring transaction",
+					 get_desc_trans_len(desc));
+			return -1;
+		}
+		offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb);
+
+		/* ok, we have a journal description block, lets see if the transaction was valid */
+		c_bh =
+		    journal_bread(p_s_sb,
+				  SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) +
+				  ((offset + get_desc_trans_len(desc) +
+				    1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb)));
+		if (!c_bh)
+			return 0;
+		commit = (struct reiserfs_journal_commit *)c_bh->b_data;
+		if (journal_compare_desc_commit(p_s_sb, desc, commit)) {
+			reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE,
+				       "journal_transaction_is_valid, commit offset %ld had bad "
+				       "time %d or length %d",
+				       c_bh->b_blocknr -
+				       SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb),
+				       get_commit_trans_id(commit),
+				       get_commit_trans_len(commit));
+			brelse(c_bh);
+			if (oldest_invalid_trans_id) {
+				*oldest_invalid_trans_id =
+				    get_desc_trans_id(desc);
+				reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE,
+					       "journal-1004: "
+					       "transaction_is_valid setting oldest invalid trans_id "
+					       "to %d",
+					       get_desc_trans_id(desc));
+			}
+			return -1;
+		}
+		brelse(c_bh);
+		reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE,
+			       "journal-1006: found valid "
+			       "transaction start offset %llu, len %d id %d",
+			       d_bh->b_blocknr -
+			       SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb),
+			       get_desc_trans_len(desc),
+			       get_desc_trans_id(desc));
+		return 1;
+	} else {
+		return 0;
+	}
+}
+
+static void brelse_array(struct buffer_head **heads, int num)
+{
+	int i;
+	for (i = 0; i < num; i++) {
+		brelse(heads[i]);
+	}
+}
+
+/*
+** given the start, and values for the oldest acceptable transactions,
+** this either reads in a replays a transaction, or returns because the transaction
+** is invalid, or too old.
+*/
+static int journal_read_transaction(struct super_block *p_s_sb,
+				    unsigned long cur_dblock,
+				    unsigned long oldest_start,
+				    unsigned long oldest_trans_id,
+				    unsigned long newest_mount_id)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	struct reiserfs_journal_desc *desc;
+	struct reiserfs_journal_commit *commit;
+	unsigned long trans_id = 0;
+	struct buffer_head *c_bh;
+	struct buffer_head *d_bh;
+	struct buffer_head **log_blocks = NULL;
+	struct buffer_head **real_blocks = NULL;
+	unsigned long trans_offset;
+	int i;
+	int trans_half;
+
+	d_bh = journal_bread(p_s_sb, cur_dblock);
+	if (!d_bh)
+		return 1;
+	desc = (struct reiserfs_journal_desc *)d_bh->b_data;
+	trans_offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb);
+	reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1037: "
+		       "journal_read_transaction, offset %llu, len %d mount_id %d",
+		       d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb),
+		       get_desc_trans_len(desc), get_desc_mount_id(desc));
+	if (get_desc_trans_id(desc) < oldest_trans_id) {
+		reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1039: "
+			       "journal_read_trans skipping because %lu is too old",
+			       cur_dblock -
+			       SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb));
+		brelse(d_bh);
+		return 1;
+	}
+	if (get_desc_mount_id(desc) != newest_mount_id) {
+		reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1146: "
+			       "journal_read_trans skipping because %d is != "
+			       "newest_mount_id %lu", get_desc_mount_id(desc),
+			       newest_mount_id);
+		brelse(d_bh);
+		return 1;
+	}
+	c_bh = journal_bread(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) +
+			     ((trans_offset + get_desc_trans_len(desc) + 1) %
+			      SB_ONDISK_JOURNAL_SIZE(p_s_sb)));
+	if (!c_bh) {
+		brelse(d_bh);
+		return 1;
+	}
+	commit = (struct reiserfs_journal_commit *)c_bh->b_data;
+	if (journal_compare_desc_commit(p_s_sb, desc, commit)) {
+		reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE,
+			       "journal_read_transaction, "
+			       "commit offset %llu had bad time %d or length %d",
+			       c_bh->b_blocknr -
+			       SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb),
+			       get_commit_trans_id(commit),
+			       get_commit_trans_len(commit));
+		brelse(c_bh);
+		brelse(d_bh);
+		return 1;
+	}
+	trans_id = get_desc_trans_id(desc);
+	/* now we know we've got a good transaction, and it was inside the valid time ranges */
+	log_blocks = kmalloc(get_desc_trans_len(desc) *
+			     sizeof(struct buffer_head *), GFP_NOFS);
+	real_blocks = kmalloc(get_desc_trans_len(desc) *
+			      sizeof(struct buffer_head *), GFP_NOFS);
+	if (!log_blocks || !real_blocks) {
+		brelse(c_bh);
+		brelse(d_bh);
+		kfree(log_blocks);
+		kfree(real_blocks);
+		reiserfs_warning(p_s_sb,
+				 "journal-1169: kmalloc failed, unable to mount FS");
+		return -1;
+	}
+	/* get all the buffer heads */
+	trans_half = journal_trans_half(p_s_sb->s_blocksize);
+	for (i = 0; i < get_desc_trans_len(desc); i++) {
+		log_blocks[i] =
+		    journal_getblk(p_s_sb,
+				   SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) +
+				   (trans_offset + 1 +
+				    i) % SB_ONDISK_JOURNAL_SIZE(p_s_sb));
+		if (i < trans_half) {
+			real_blocks[i] =
+			    sb_getblk(p_s_sb,
+				      le32_to_cpu(desc->j_realblock[i]));
+		} else {
+			real_blocks[i] =
+			    sb_getblk(p_s_sb,
+				      le32_to_cpu(commit->
+						  j_realblock[i - trans_half]));
+		}
+		if (real_blocks[i]->b_blocknr > SB_BLOCK_COUNT(p_s_sb)) {
+			reiserfs_warning(p_s_sb,
+					 "journal-1207: REPLAY FAILURE fsck required! Block to replay is outside of filesystem");
+			goto abort_replay;
+		}
+		/* make sure we don't try to replay onto log or reserved area */
+		if (is_block_in_log_or_reserved_area
+		    (p_s_sb, real_blocks[i]->b_blocknr)) {
+			reiserfs_warning(p_s_sb,
+					 "journal-1204: REPLAY FAILURE fsck required! Trying to replay onto a log block");
+		      abort_replay:
+			brelse_array(log_blocks, i);
+			brelse_array(real_blocks, i);
+			brelse(c_bh);
+			brelse(d_bh);
+			kfree(log_blocks);
+			kfree(real_blocks);
+			return -1;
+		}
+	}
+	/* read in the log blocks, memcpy to the corresponding real block */
+	ll_rw_block(READ, get_desc_trans_len(desc), log_blocks);
+	for (i = 0; i < get_desc_trans_len(desc); i++) {
+		wait_on_buffer(log_blocks[i]);
+		if (!buffer_uptodate(log_blocks[i])) {
+			reiserfs_warning(p_s_sb,
+					 "journal-1212: REPLAY FAILURE fsck required! buffer write failed");
+			brelse_array(log_blocks + i,
+				     get_desc_trans_len(desc) - i);
+			brelse_array(real_blocks, get_desc_trans_len(desc));
+			brelse(c_bh);
+			brelse(d_bh);
+			kfree(log_blocks);
+			kfree(real_blocks);
+			return -1;
+		}
+		memcpy(real_blocks[i]->b_data, log_blocks[i]->b_data,
+		       real_blocks[i]->b_size);
+		set_buffer_uptodate(real_blocks[i]);
+		brelse(log_blocks[i]);
+	}
+	/* flush out the real blocks */
+	for (i = 0; i < get_desc_trans_len(desc); i++) {
+		set_buffer_dirty(real_blocks[i]);
+		ll_rw_block(SWRITE, 1, real_blocks + i);
+	}
+	for (i = 0; i < get_desc_trans_len(desc); i++) {
+		wait_on_buffer(real_blocks[i]);
+		if (!buffer_uptodate(real_blocks[i])) {
+			reiserfs_warning(p_s_sb,
+					 "journal-1226: REPLAY FAILURE, fsck required! buffer write failed");
+			brelse_array(real_blocks + i,
+				     get_desc_trans_len(desc) - i);
+			brelse(c_bh);
+			brelse(d_bh);
+			kfree(log_blocks);
+			kfree(real_blocks);
+			return -1;
+		}
+		brelse(real_blocks[i]);
+	}
+	cur_dblock =
+	    SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) +
+	    ((trans_offset + get_desc_trans_len(desc) +
+	      2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb));
+	reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE,
+		       "journal-1095: setting journal " "start to offset %ld",
+		       cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb));
+
+	/* init starting values for the first transaction, in case this is the last transaction to be replayed. */
+	journal->j_start = cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb);
+	journal->j_last_flush_trans_id = trans_id;
+	journal->j_trans_id = trans_id + 1;
+	/* check for trans_id overflow */
+	if (journal->j_trans_id == 0)
+		journal->j_trans_id = 10;
+	brelse(c_bh);
+	brelse(d_bh);
+	kfree(log_blocks);
+	kfree(real_blocks);
+	return 0;
+}
+
+/* This function reads blocks starting from block and to max_block of bufsize
+   size (but no more than BUFNR blocks at a time). This proved to improve
+   mounting speed on self-rebuilding raid5 arrays at least.
+   Right now it is only used from journal code. But later we might use it
+   from other places.
+   Note: Do not use journal_getblk/sb_getblk functions here! */
+static struct buffer_head *reiserfs_breada(struct block_device *dev,
+					   b_blocknr_t block, int bufsize,
+					   b_blocknr_t max_block)
+{
+	struct buffer_head *bhlist[BUFNR];
+	unsigned int blocks = BUFNR;
+	struct buffer_head *bh;
+	int i, j;
+
+	bh = __getblk(dev, block, bufsize);
+	if (buffer_uptodate(bh))
+		return (bh);
+
+	if (block + BUFNR > max_block) {
+		blocks = max_block - block;
+	}
+	bhlist[0] = bh;
+	j = 1;
+	for (i = 1; i < blocks; i++) {
+		bh = __getblk(dev, block + i, bufsize);
+		if (buffer_uptodate(bh)) {
+			brelse(bh);
+			break;
+		} else
+			bhlist[j++] = bh;
+	}
+	ll_rw_block(READ, j, bhlist);
+	for (i = 1; i < j; i++)
+		brelse(bhlist[i]);
+	bh = bhlist[0];
+	wait_on_buffer(bh);
+	if (buffer_uptodate(bh))
+		return bh;
+	brelse(bh);
+	return NULL;
+}
+
+/*
+** read and replay the log
+** on a clean unmount, the journal header's next unflushed pointer will be to an invalid
+** transaction.  This tests that before finding all the transactions in the log, which makes normal mount times fast.
+**
+** After a crash, this starts with the next unflushed transaction, and replays until it finds one too old, or invalid.
+**
+** On exit, it sets things up so the first transaction will work correctly.
+*/
+static int journal_read(struct super_block *p_s_sb)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	struct reiserfs_journal_desc *desc;
+	unsigned long oldest_trans_id = 0;
+	unsigned long oldest_invalid_trans_id = 0;
+	time_t start;
+	unsigned long oldest_start = 0;
+	unsigned long cur_dblock = 0;
+	unsigned long newest_mount_id = 9;
+	struct buffer_head *d_bh;
+	struct reiserfs_journal_header *jh;
+	int valid_journal_header = 0;
+	int replay_count = 0;
+	int continue_replay = 1;
+	int ret;
+	char b[BDEVNAME_SIZE];
+
+	cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb);
+	reiserfs_info(p_s_sb, "checking transaction log (%s)\n",
+		      bdevname(journal->j_dev_bd, b));
+	start = get_seconds();
+
+	/* step 1, read in the journal header block.  Check the transaction it says 
+	 ** is the first unflushed, and if that transaction is not valid, 
+	 ** replay is done
+	 */
+	journal->j_header_bh = journal_bread(p_s_sb,
+					     SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb)
+					     + SB_ONDISK_JOURNAL_SIZE(p_s_sb));
+	if (!journal->j_header_bh) {
+		return 1;
+	}
+	jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data);
+	if (le32_to_cpu(jh->j_first_unflushed_offset) <
+	    SB_ONDISK_JOURNAL_SIZE(p_s_sb)
+	    && le32_to_cpu(jh->j_last_flush_trans_id) > 0) {
+		oldest_start =
+		    SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) +
+		    le32_to_cpu(jh->j_first_unflushed_offset);
+		oldest_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1;
+		newest_mount_id = le32_to_cpu(jh->j_mount_id);
+		reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE,
+			       "journal-1153: found in "
+			       "header: first_unflushed_offset %d, last_flushed_trans_id "
+			       "%lu", le32_to_cpu(jh->j_first_unflushed_offset),
+			       le32_to_cpu(jh->j_last_flush_trans_id));
+		valid_journal_header = 1;
+
+		/* now, we try to read the first unflushed offset.  If it is not valid, 
+		 ** there is nothing more we can do, and it makes no sense to read 
+		 ** through the whole log.
+		 */
+		d_bh =
+		    journal_bread(p_s_sb,
+				  SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) +
+				  le32_to_cpu(jh->j_first_unflushed_offset));
+		ret = journal_transaction_is_valid(p_s_sb, d_bh, NULL, NULL);
+		if (!ret) {
+			continue_replay = 0;
+		}
+		brelse(d_bh);
+		goto start_log_replay;
+	}
+
+	if (continue_replay && bdev_read_only(p_s_sb->s_bdev)) {
+		reiserfs_warning(p_s_sb,
+				 "clm-2076: device is readonly, unable to replay log");
+		return -1;
+	}
+
+	/* ok, there are transactions that need to be replayed.  start with the first log block, find
+	 ** all the valid transactions, and pick out the oldest.
+	 */
+	while (continue_replay
+	       && cur_dblock <
+	       (SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) +
+		SB_ONDISK_JOURNAL_SIZE(p_s_sb))) {
+		/* Note that it is required for blocksize of primary fs device and journal
+		   device to be the same */
+		d_bh =
+		    reiserfs_breada(journal->j_dev_bd, cur_dblock,
+				    p_s_sb->s_blocksize,
+				    SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) +
+				    SB_ONDISK_JOURNAL_SIZE(p_s_sb));
+		ret =
+		    journal_transaction_is_valid(p_s_sb, d_bh,
+						 &oldest_invalid_trans_id,
+						 &newest_mount_id);
+		if (ret == 1) {
+			desc = (struct reiserfs_journal_desc *)d_bh->b_data;
+			if (oldest_start == 0) {	/* init all oldest_ values */
+				oldest_trans_id = get_desc_trans_id(desc);
+				oldest_start = d_bh->b_blocknr;
+				newest_mount_id = get_desc_mount_id(desc);
+				reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE,
+					       "journal-1179: Setting "
+					       "oldest_start to offset %llu, trans_id %lu",
+					       oldest_start -
+					       SB_ONDISK_JOURNAL_1st_BLOCK
+					       (p_s_sb), oldest_trans_id);
+			} else if (oldest_trans_id > get_desc_trans_id(desc)) {
+				/* one we just read was older */
+				oldest_trans_id = get_desc_trans_id(desc);
+				oldest_start = d_bh->b_blocknr;
+				reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE,
+					       "journal-1180: Resetting "
+					       "oldest_start to offset %lu, trans_id %lu",
+					       oldest_start -
+					       SB_ONDISK_JOURNAL_1st_BLOCK
+					       (p_s_sb), oldest_trans_id);
+			}
+			if (newest_mount_id < get_desc_mount_id(desc)) {
+				newest_mount_id = get_desc_mount_id(desc);
+				reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE,
+					       "journal-1299: Setting "
+					       "newest_mount_id to %d",
+					       get_desc_mount_id(desc));
+			}
+			cur_dblock += get_desc_trans_len(desc) + 2;
+		} else {
+			cur_dblock++;
+		}
+		brelse(d_bh);
+	}
+
+      start_log_replay:
+	cur_dblock = oldest_start;
+	if (oldest_trans_id) {
+		reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE,
+			       "journal-1206: Starting replay "
+			       "from offset %llu, trans_id %lu",
+			       cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb),
+			       oldest_trans_id);
+
+	}
+	replay_count = 0;
+	while (continue_replay && oldest_trans_id > 0) {
+		ret =
+		    journal_read_transaction(p_s_sb, cur_dblock, oldest_start,
+					     oldest_trans_id, newest_mount_id);
+		if (ret < 0) {
+			return ret;
+		} else if (ret != 0) {
+			break;
+		}
+		cur_dblock =
+		    SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + journal->j_start;
+		replay_count++;
+		if (cur_dblock == oldest_start)
+			break;
+	}
+
+	if (oldest_trans_id == 0) {
+		reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE,
+			       "journal-1225: No valid " "transactions found");
+	}
+	/* j_start does not get set correctly if we don't replay any transactions.
+	 ** if we had a valid journal_header, set j_start to the first unflushed transaction value,
+	 ** copy the trans_id from the header
+	 */
+	if (valid_journal_header && replay_count == 0) {
+		journal->j_start = le32_to_cpu(jh->j_first_unflushed_offset);
+		journal->j_trans_id =
+		    le32_to_cpu(jh->j_last_flush_trans_id) + 1;
+		/* check for trans_id overflow */
+		if (journal->j_trans_id == 0)
+			journal->j_trans_id = 10;
+		journal->j_last_flush_trans_id =
+		    le32_to_cpu(jh->j_last_flush_trans_id);
+		journal->j_mount_id = le32_to_cpu(jh->j_mount_id) + 1;
+	} else {
+		journal->j_mount_id = newest_mount_id + 1;
+	}
+	reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1299: Setting "
+		       "newest_mount_id to %lu", journal->j_mount_id);
+	journal->j_first_unflushed_offset = journal->j_start;
+	if (replay_count > 0) {
+		reiserfs_info(p_s_sb,
+			      "replayed %d transactions in %lu seconds\n",
+			      replay_count, get_seconds() - start);
+	}
+	if (!bdev_read_only(p_s_sb->s_bdev) &&
+	    _update_journal_header_block(p_s_sb, journal->j_start,
+					 journal->j_last_flush_trans_id)) {
+		/* replay failed, caller must call free_journal_ram and abort
+		 ** the mount
+		 */
+		return -1;
+	}
+	return 0;
+}
+
+static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s)
+{
+	struct reiserfs_journal_list *jl;
+	jl = kzalloc(sizeof(struct reiserfs_journal_list),
+		     GFP_NOFS | __GFP_NOFAIL);
+	INIT_LIST_HEAD(&jl->j_list);
+	INIT_LIST_HEAD(&jl->j_working_list);
+	INIT_LIST_HEAD(&jl->j_tail_bh_list);
+	INIT_LIST_HEAD(&jl->j_bh_list);
+	mutex_init(&jl->j_commit_mutex);
+	SB_JOURNAL(s)->j_num_lists++;
+	get_journal_list(jl);
+	return jl;
+}
+
+static void journal_list_init(struct super_block *p_s_sb)
+{
+	SB_JOURNAL(p_s_sb)->j_current_jl = alloc_journal_list(p_s_sb);
+}
+
+static int release_journal_dev(struct super_block *super,
+			       struct reiserfs_journal *journal)
+{
+	int result;
+
+	result = 0;
+
+	if (journal->j_dev_bd != NULL) {
+		if (journal->j_dev_bd->bd_dev != super->s_dev)
+			bd_release(journal->j_dev_bd);
+		result = blkdev_put(journal->j_dev_bd, journal->j_dev_mode);
+		journal->j_dev_bd = NULL;
+	}
+
+	if (result != 0) {
+		reiserfs_warning(super,
+				 "sh-457: release_journal_dev: Cannot release journal device: %i",
+				 result);
+	}
+	return result;
+}
+
+static int journal_init_dev(struct super_block *super,
+			    struct reiserfs_journal *journal,
+			    const char *jdev_name)
+{
+	int result;
+	dev_t jdev;
+	fmode_t blkdev_mode = FMODE_READ | FMODE_WRITE;
+	char b[BDEVNAME_SIZE];
+
+	result = 0;
+
+	journal->j_dev_bd = NULL;
+	jdev = SB_ONDISK_JOURNAL_DEVICE(super) ?
+	    new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev;
+
+	if (bdev_read_only(super->s_bdev))
+		blkdev_mode = FMODE_READ;
+
+	/* there is no "jdev" option and journal is on separate device */
+	if ((!jdev_name || !jdev_name[0])) {
+		journal->j_dev_bd = open_by_devnum(jdev, blkdev_mode);
+		journal->j_dev_mode = blkdev_mode;
+		if (IS_ERR(journal->j_dev_bd)) {
+			result = PTR_ERR(journal->j_dev_bd);
+			journal->j_dev_bd = NULL;
+			reiserfs_warning(super, "sh-458: journal_init_dev: "
+					 "cannot init journal device '%s': %i",
+					 __bdevname(jdev, b), result);
+			return result;
+		} else if (jdev != super->s_dev) {
+			result = bd_claim(journal->j_dev_bd, journal);
+			if (result) {
+				blkdev_put(journal->j_dev_bd, blkdev_mode);
+				return result;
+			}
+
+			set_blocksize(journal->j_dev_bd, super->s_blocksize);
+		}
+
+		return 0;
+	}
+
+	journal->j_dev_mode = blkdev_mode;
+	journal->j_dev_bd = open_bdev_exclusive(jdev_name,
+						blkdev_mode, journal);
+	if (IS_ERR(journal->j_dev_bd)) {
+		result = PTR_ERR(journal->j_dev_bd);
+		journal->j_dev_bd = NULL;
+		reiserfs_warning(super,
+				 "journal_init_dev: Cannot open '%s': %i",
+				 jdev_name, result);
+		return result;
+	}
+
+	set_blocksize(journal->j_dev_bd, super->s_blocksize);
+	reiserfs_info(super,
+		      "journal_init_dev: journal device: %s\n",
+		      bdevname(journal->j_dev_bd, b));
+	return 0;
+}
+
+/**
+ * When creating/tuning a file system user can assign some
+ * journal params within boundaries which depend on the ratio
+ * blocksize/standard_blocksize.
+ *
+ * For blocks >= standard_blocksize transaction size should
+ * be not less then JOURNAL_TRANS_MIN_DEFAULT, and not more
+ * then JOURNAL_TRANS_MAX_DEFAULT.
+ *
+ * For blocks < standard_blocksize these boundaries should be
+ * decreased proportionally.
+ */
+#define REISERFS_STANDARD_BLKSIZE (4096)
+
+static int check_advise_trans_params(struct super_block *p_s_sb,
+				     struct reiserfs_journal *journal)
+{
+        if (journal->j_trans_max) {
+	        /* Non-default journal params.
+		   Do sanity check for them. */
+	        int ratio = 1;
+		if (p_s_sb->s_blocksize < REISERFS_STANDARD_BLKSIZE)
+		        ratio = REISERFS_STANDARD_BLKSIZE / p_s_sb->s_blocksize;
+
+		if (journal->j_trans_max > JOURNAL_TRANS_MAX_DEFAULT / ratio ||
+		    journal->j_trans_max < JOURNAL_TRANS_MIN_DEFAULT / ratio ||
+		    SB_ONDISK_JOURNAL_SIZE(p_s_sb) / journal->j_trans_max <
+		    JOURNAL_MIN_RATIO) {
+		        reiserfs_warning(p_s_sb,
+				 "sh-462: bad transaction max size (%u). FSCK?",
+				 journal->j_trans_max);
+			return 1;
+		}
+		if (journal->j_max_batch != (journal->j_trans_max) *
+		        JOURNAL_MAX_BATCH_DEFAULT/JOURNAL_TRANS_MAX_DEFAULT) {
+		        reiserfs_warning(p_s_sb,
+				"sh-463: bad transaction max batch (%u). FSCK?",
+				journal->j_max_batch);
+			return 1;
+		}
+	} else {
+		/* Default journal params.
+                   The file system was created by old version
+		   of mkreiserfs, so some fields contain zeros,
+		   and we need to advise proper values for them */
+	        if (p_s_sb->s_blocksize != REISERFS_STANDARD_BLKSIZE)
+	                reiserfs_panic(p_s_sb, "sh-464: bad blocksize (%u)",
+				       p_s_sb->s_blocksize);
+		journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT;
+		journal->j_max_batch = JOURNAL_MAX_BATCH_DEFAULT;
+		journal->j_max_commit_age = JOURNAL_MAX_COMMIT_AGE;
+	}
+	return 0;
+}
+
+/*
+** must be called once on fs mount.  calls journal_read for you
+*/
+int journal_init(struct super_block *p_s_sb, const char *j_dev_name,
+		 int old_format, unsigned int commit_max_age)
+{
+	int num_cnodes = SB_ONDISK_JOURNAL_SIZE(p_s_sb) * 2;
+	struct buffer_head *bhjh;
+	struct reiserfs_super_block *rs;
+	struct reiserfs_journal_header *jh;
+	struct reiserfs_journal *journal;
+	struct reiserfs_journal_list *jl;
+	char b[BDEVNAME_SIZE];
+
+	journal = SB_JOURNAL(p_s_sb) = vmalloc(sizeof(struct reiserfs_journal));
+	if (!journal) {
+		reiserfs_warning(p_s_sb,
+				 "journal-1256: unable to get memory for journal structure");
+		return 1;
+	}
+	memset(journal, 0, sizeof(struct reiserfs_journal));
+	INIT_LIST_HEAD(&journal->j_bitmap_nodes);
+	INIT_LIST_HEAD(&journal->j_prealloc_list);
+	INIT_LIST_HEAD(&journal->j_working_list);
+	INIT_LIST_HEAD(&journal->j_journal_list);
+	journal->j_persistent_trans = 0;
+	if (reiserfs_allocate_list_bitmaps(p_s_sb,
+					   journal->j_list_bitmap,
+					   reiserfs_bmap_count(p_s_sb)))
+		goto free_and_return;
+	allocate_bitmap_nodes(p_s_sb);
+
+	/* reserved for journal area support */
+	SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb) = (old_format ?
+						 REISERFS_OLD_DISK_OFFSET_IN_BYTES
+						 / p_s_sb->s_blocksize +
+						 reiserfs_bmap_count(p_s_sb) +
+						 1 :
+						 REISERFS_DISK_OFFSET_IN_BYTES /
+						 p_s_sb->s_blocksize + 2);
+
+	/* Sanity check to see is the standard journal fitting withing first bitmap
+	   (actual for small blocksizes) */
+	if (!SB_ONDISK_JOURNAL_DEVICE(p_s_sb) &&
+	    (SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb) +
+	     SB_ONDISK_JOURNAL_SIZE(p_s_sb) > p_s_sb->s_blocksize * 8)) {
+		reiserfs_warning(p_s_sb,
+				 "journal-1393: journal does not fit for area "
+				 "addressed by first of bitmap blocks. It starts at "
+				 "%u and its size is %u. Block size %ld",
+				 SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb),
+				 SB_ONDISK_JOURNAL_SIZE(p_s_sb),
+				 p_s_sb->s_blocksize);
+		goto free_and_return;
+	}
+
+	if (journal_init_dev(p_s_sb, journal, j_dev_name) != 0) {
+		reiserfs_warning(p_s_sb,
+				 "sh-462: unable to initialize jornal device");
+		goto free_and_return;
+	}
+
+	rs = SB_DISK_SUPER_BLOCK(p_s_sb);
+
+	/* read journal header */
+	bhjh = journal_bread(p_s_sb,
+			     SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) +
+			     SB_ONDISK_JOURNAL_SIZE(p_s_sb));
+	if (!bhjh) {
+		reiserfs_warning(p_s_sb,
+				 "sh-459: unable to read journal header");
+		goto free_and_return;
+	}
+	jh = (struct reiserfs_journal_header *)(bhjh->b_data);
+
+	/* make sure that journal matches to the super block */
+	if (is_reiserfs_jr(rs)
+	    && (le32_to_cpu(jh->jh_journal.jp_journal_magic) !=
+		sb_jp_journal_magic(rs))) {
+		reiserfs_warning(p_s_sb,
+				 "sh-460: journal header magic %x "
+				 "(device %s) does not match to magic found in super "
+				 "block %x", jh->jh_journal.jp_journal_magic,
+				 bdevname(journal->j_dev_bd, b),
+				 sb_jp_journal_magic(rs));
+		brelse(bhjh);
+		goto free_and_return;
+	}
+
+	journal->j_trans_max = le32_to_cpu(jh->jh_journal.jp_journal_trans_max);
+	journal->j_max_batch = le32_to_cpu(jh->jh_journal.jp_journal_max_batch);
+	journal->j_max_commit_age =
+	    le32_to_cpu(jh->jh_journal.jp_journal_max_commit_age);
+	journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
+
+	if (check_advise_trans_params(p_s_sb, journal) != 0)
+	        goto free_and_return;
+	journal->j_default_max_commit_age = journal->j_max_commit_age;
+
+	if (commit_max_age != 0) {
+		journal->j_max_commit_age = commit_max_age;
+		journal->j_max_trans_age = commit_max_age;
+	}
+
+	reiserfs_info(p_s_sb, "journal params: device %s, size %u, "
+		      "journal first block %u, max trans len %u, max batch %u, "
+		      "max commit age %u, max trans age %u\n",
+		      bdevname(journal->j_dev_bd, b),
+		      SB_ONDISK_JOURNAL_SIZE(p_s_sb),
+		      SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb),
+		      journal->j_trans_max,
+		      journal->j_max_batch,
+		      journal->j_max_commit_age, journal->j_max_trans_age);
+
+	brelse(bhjh);
+
+	journal->j_list_bitmap_index = 0;
+	journal_list_init(p_s_sb);
+
+	memset(journal->j_list_hash_table, 0,
+	       JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *));
+
+	INIT_LIST_HEAD(&journal->j_dirty_buffers);
+	spin_lock_init(&journal->j_dirty_buffers_lock);
+
+	journal->j_start = 0;
+	journal->j_len = 0;
+	journal->j_len_alloc = 0;
+	atomic_set(&(journal->j_wcount), 0);
+	atomic_set(&(journal->j_async_throttle), 0);
+	journal->j_bcount = 0;
+	journal->j_trans_start_time = 0;
+	journal->j_last = NULL;
+	journal->j_first = NULL;
+	init_waitqueue_head(&(journal->j_join_wait));
+	mutex_init(&journal->j_mutex);
+	mutex_init(&journal->j_flush_mutex);
+
+	journal->j_trans_id = 10;
+	journal->j_mount_id = 10;
+	journal->j_state = 0;
+	atomic_set(&(journal->j_jlock), 0);
+	journal->j_cnode_free_list = allocate_cnodes(num_cnodes);
+	journal->j_cnode_free_orig = journal->j_cnode_free_list;
+	journal->j_cnode_free = journal->j_cnode_free_list ? num_cnodes : 0;
+	journal->j_cnode_used = 0;
+	journal->j_must_wait = 0;
+
+	if (journal->j_cnode_free == 0) {
+        	reiserfs_warning(p_s_sb, "journal-2004: Journal cnode memory "
+		                 "allocation failed (%ld bytes). Journal is "
+		                 "too large for available memory. Usually "
+		                 "this is due to a journal that is too large.",
+		                 sizeof (struct reiserfs_journal_cnode) * num_cnodes);
+        	goto free_and_return;
+	}
+
+	init_journal_hash(p_s_sb);
+	jl = journal->j_current_jl;
+	jl->j_list_bitmap = get_list_bitmap(p_s_sb, jl);
+	if (!jl->j_list_bitmap) {
+		reiserfs_warning(p_s_sb,
+				 "journal-2005, get_list_bitmap failed for journal list 0");
+		goto free_and_return;
+	}
+	if (journal_read(p_s_sb) < 0) {
+		reiserfs_warning(p_s_sb, "Replay Failure, unable to mount");
+		goto free_and_return;
+	}
+
+	reiserfs_mounted_fs_count++;
+	if (reiserfs_mounted_fs_count <= 1)
+		commit_wq = create_workqueue("reiserfs");
+
+	INIT_DELAYED_WORK(&journal->j_work, flush_async_commits);
+	journal->j_work_sb = p_s_sb;
+	return 0;
+      free_and_return:
+	free_journal_ram(p_s_sb);
+	return 1;
+}
+
+/*
+** test for a polite end of the current transaction.  Used by file_write, and should
+** be used by delete to make sure they don't write more than can fit inside a single
+** transaction
+*/
+int journal_transaction_should_end(struct reiserfs_transaction_handle *th,
+				   int new_alloc)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(th->t_super);
+	time_t now = get_seconds();
+	/* cannot restart while nested */
+	BUG_ON(!th->t_trans_id);
+	if (th->t_refcount > 1)
+		return 0;
+	if (journal->j_must_wait > 0 ||
+	    (journal->j_len_alloc + new_alloc) >= journal->j_max_batch ||
+	    atomic_read(&(journal->j_jlock)) ||
+	    (now - journal->j_trans_start_time) > journal->j_max_trans_age ||
+	    journal->j_cnode_free < (journal->j_trans_max * 3)) {
+		return 1;
+	}
+	/* protected by the BKL here */
+	journal->j_len_alloc += new_alloc;
+	th->t_blocks_allocated += new_alloc ;
+	return 0;
+}
+
+/* this must be called inside a transaction, and requires the 
+** kernel_lock to be held
+*/
+void reiserfs_block_writes(struct reiserfs_transaction_handle *th)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(th->t_super);
+	BUG_ON(!th->t_trans_id);
+	journal->j_must_wait = 1;
+	set_bit(J_WRITERS_BLOCKED, &journal->j_state);
+	return;
+}
+
+/* this must be called without a transaction started, and does not
+** require BKL
+*/
+void reiserfs_allow_writes(struct super_block *s)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(s);
+	clear_bit(J_WRITERS_BLOCKED, &journal->j_state);
+	wake_up(&journal->j_join_wait);
+}
+
+/* this must be called without a transaction started, and does not
+** require BKL
+*/
+void reiserfs_wait_on_write_block(struct super_block *s)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(s);
+	wait_event(journal->j_join_wait,
+		   !test_bit(J_WRITERS_BLOCKED, &journal->j_state));
+}
+
+static void queue_log_writer(struct super_block *s)
+{
+	wait_queue_t wait;
+	struct reiserfs_journal *journal = SB_JOURNAL(s);
+	set_bit(J_WRITERS_QUEUED, &journal->j_state);
+
+	/*
+	 * we don't want to use wait_event here because
+	 * we only want to wait once.
+	 */
+	init_waitqueue_entry(&wait, current);
+	add_wait_queue(&journal->j_join_wait, &wait);
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	if (test_bit(J_WRITERS_QUEUED, &journal->j_state))
+		schedule();
+	__set_current_state(TASK_RUNNING);
+	remove_wait_queue(&journal->j_join_wait, &wait);
+}
+
+static void wake_queued_writers(struct super_block *s)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(s);
+	if (test_and_clear_bit(J_WRITERS_QUEUED, &journal->j_state))
+		wake_up(&journal->j_join_wait);
+}
+
+static void let_transaction_grow(struct super_block *sb, unsigned long trans_id)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(sb);
+	unsigned long bcount = journal->j_bcount;
+	while (1) {
+		schedule_timeout_uninterruptible(1);
+		journal->j_current_jl->j_state |= LIST_COMMIT_PENDING;
+		while ((atomic_read(&journal->j_wcount) > 0 ||
+			atomic_read(&journal->j_jlock)) &&
+		       journal->j_trans_id == trans_id) {
+			queue_log_writer(sb);
+		}
+		if (journal->j_trans_id != trans_id)
+			break;
+		if (bcount == journal->j_bcount)
+			break;
+		bcount = journal->j_bcount;
+	}
+}
+
+/* join == true if you must join an existing transaction.
+** join == false if you can deal with waiting for others to finish
+**
+** this will block until the transaction is joinable.  send the number of blocks you
+** expect to use in nblocks.
+*/
+static int do_journal_begin_r(struct reiserfs_transaction_handle *th,
+			      struct super_block *p_s_sb, unsigned long nblocks,
+			      int join)
+{
+	time_t now = get_seconds();
+	int old_trans_id;
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	struct reiserfs_transaction_handle myth;
+	int sched_count = 0;
+	int retval;
+
+	reiserfs_check_lock_depth(p_s_sb, "journal_begin");
+	BUG_ON(nblocks > journal->j_trans_max);
+
+	PROC_INFO_INC(p_s_sb, journal.journal_being);
+	/* set here for journal_join */
+	th->t_refcount = 1;
+	th->t_super = p_s_sb;
+
+      relock:
+	lock_journal(p_s_sb);
+	if (join != JBEGIN_ABORT && reiserfs_is_journal_aborted(journal)) {
+		unlock_journal(p_s_sb);
+		retval = journal->j_errno;
+		goto out_fail;
+	}
+	journal->j_bcount++;
+
+	if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) {
+		unlock_journal(p_s_sb);
+		reiserfs_wait_on_write_block(p_s_sb);
+		PROC_INFO_INC(p_s_sb, journal.journal_relock_writers);
+		goto relock;
+	}
+	now = get_seconds();
+
+	/* if there is no room in the journal OR
+	 ** if this transaction is too old, and we weren't called joinable, wait for it to finish before beginning 
+	 ** we don't sleep if there aren't other writers
+	 */
+
+	if ((!join && journal->j_must_wait > 0) ||
+	    (!join
+	     && (journal->j_len_alloc + nblocks + 2) >= journal->j_max_batch)
+	    || (!join && atomic_read(&journal->j_wcount) > 0
+		&& journal->j_trans_start_time > 0
+		&& (now - journal->j_trans_start_time) >
+		journal->j_max_trans_age) || (!join
+					      && atomic_read(&journal->j_jlock))
+	    || (!join && journal->j_cnode_free < (journal->j_trans_max * 3))) {
+
+		old_trans_id = journal->j_trans_id;
+		unlock_journal(p_s_sb);	/* allow others to finish this transaction */
+
+		if (!join && (journal->j_len_alloc + nblocks + 2) >=
+		    journal->j_max_batch &&
+		    ((journal->j_len + nblocks + 2) * 100) <
+		    (journal->j_len_alloc * 75)) {
+			if (atomic_read(&journal->j_wcount) > 10) {
+				sched_count++;
+				queue_log_writer(p_s_sb);
+				goto relock;
+			}
+		}
+		/* don't mess with joining the transaction if all we have to do is
+		 * wait for someone else to do a commit
+		 */
+		if (atomic_read(&journal->j_jlock)) {
+			while (journal->j_trans_id == old_trans_id &&
+			       atomic_read(&journal->j_jlock)) {
+				queue_log_writer(p_s_sb);
+			}
+			goto relock;
+		}
+		retval = journal_join(&myth, p_s_sb, 1);
+		if (retval)
+			goto out_fail;
+
+		/* someone might have ended the transaction while we joined */
+		if (old_trans_id != journal->j_trans_id) {
+			retval = do_journal_end(&myth, p_s_sb, 1, 0);
+		} else {
+			retval = do_journal_end(&myth, p_s_sb, 1, COMMIT_NOW);
+		}
+
+		if (retval)
+			goto out_fail;
+
+		PROC_INFO_INC(p_s_sb, journal.journal_relock_wcount);
+		goto relock;
+	}
+	/* we are the first writer, set trans_id */
+	if (journal->j_trans_start_time == 0) {
+		journal->j_trans_start_time = get_seconds();
+	}
+	atomic_inc(&(journal->j_wcount));
+	journal->j_len_alloc += nblocks;
+	th->t_blocks_logged = 0;
+	th->t_blocks_allocated = nblocks;
+	th->t_trans_id = journal->j_trans_id;
+	unlock_journal(p_s_sb);
+	INIT_LIST_HEAD(&th->t_list);
+	get_fs_excl();
+	return 0;
+
+      out_fail:
+	memset(th, 0, sizeof(*th));
+	/* Re-set th->t_super, so we can properly keep track of how many
+	 * persistent transactions there are. We need to do this so if this
+	 * call is part of a failed restart_transaction, we can free it later */
+	th->t_super = p_s_sb;
+	return retval;
+}
+
+struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct
+								    super_block
+								    *s,
+								    int nblocks)
+{
+	int ret;
+	struct reiserfs_transaction_handle *th;
+
+	/* if we're nesting into an existing transaction.  It will be
+	 ** persistent on its own
+	 */
+	if (reiserfs_transaction_running(s)) {
+		th = current->journal_info;
+		th->t_refcount++;
+		BUG_ON(th->t_refcount < 2);
+		
+		return th;
+	}
+	th = kmalloc(sizeof(struct reiserfs_transaction_handle), GFP_NOFS);
+	if (!th)
+		return NULL;
+	ret = journal_begin(th, s, nblocks);
+	if (ret) {
+		kfree(th);
+		return NULL;
+	}
+
+	SB_JOURNAL(s)->j_persistent_trans++;
+	return th;
+}
+
+int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *th)
+{
+	struct super_block *s = th->t_super;
+	int ret = 0;
+	if (th->t_trans_id)
+		ret = journal_end(th, th->t_super, th->t_blocks_allocated);
+	else
+		ret = -EIO;
+	if (th->t_refcount == 0) {
+		SB_JOURNAL(s)->j_persistent_trans--;
+		kfree(th);
+	}
+	return ret;
+}
+
+static int journal_join(struct reiserfs_transaction_handle *th,
+			struct super_block *p_s_sb, unsigned long nblocks)
+{
+	struct reiserfs_transaction_handle *cur_th = current->journal_info;
+
+	/* this keeps do_journal_end from NULLing out the current->journal_info
+	 ** pointer
+	 */
+	th->t_handle_save = cur_th;
+	BUG_ON(cur_th && cur_th->t_refcount > 1);
+	return do_journal_begin_r(th, p_s_sb, nblocks, JBEGIN_JOIN);
+}
+
+int journal_join_abort(struct reiserfs_transaction_handle *th,
+		       struct super_block *p_s_sb, unsigned long nblocks)
+{
+	struct reiserfs_transaction_handle *cur_th = current->journal_info;
+
+	/* this keeps do_journal_end from NULLing out the current->journal_info
+	 ** pointer
+	 */
+	th->t_handle_save = cur_th;
+	BUG_ON(cur_th && cur_th->t_refcount > 1);
+	return do_journal_begin_r(th, p_s_sb, nblocks, JBEGIN_ABORT);
+}
+
+int journal_begin(struct reiserfs_transaction_handle *th,
+		  struct super_block *p_s_sb, unsigned long nblocks)
+{
+	struct reiserfs_transaction_handle *cur_th = current->journal_info;
+	int ret;
+
+	th->t_handle_save = NULL;
+	if (cur_th) {
+		/* we are nesting into the current transaction */
+		if (cur_th->t_super == p_s_sb) {
+			BUG_ON(!cur_th->t_refcount);
+			cur_th->t_refcount++;
+			memcpy(th, cur_th, sizeof(*th));
+			if (th->t_refcount <= 1)
+				reiserfs_warning(p_s_sb,
+						 "BAD: refcount <= 1, but journal_info != 0");
+			return 0;
+		} else {
+			/* we've ended up with a handle from a different filesystem.
+			 ** save it and restore on journal_end.  This should never
+			 ** really happen...
+			 */
+			reiserfs_warning(p_s_sb,
+					 "clm-2100: nesting info a different FS");
+			th->t_handle_save = current->journal_info;
+			current->journal_info = th;
+		}
+	} else {
+		current->journal_info = th;
+	}
+	ret = do_journal_begin_r(th, p_s_sb, nblocks, JBEGIN_REG);
+	BUG_ON(current->journal_info != th);
+
+	/* I guess this boils down to being the reciprocal of clm-2100 above.
+	 * If do_journal_begin_r fails, we need to put it back, since journal_end
+	 * won't be called to do it. */
+	if (ret)
+		current->journal_info = th->t_handle_save;
+	else
+		BUG_ON(!th->t_refcount);
+
+	return ret;
+}
+
+/*
+** puts bh into the current transaction.  If it was already there, reorders removes the
+** old pointers from the hash, and puts new ones in (to make sure replay happen in the right order).
+**
+** if it was dirty, cleans and files onto the clean list.  I can't let it be dirty again until the
+** transaction is committed.
+** 
+** if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len.
+*/
+int journal_mark_dirty(struct reiserfs_transaction_handle *th,
+		       struct super_block *p_s_sb, struct buffer_head *bh)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	struct reiserfs_journal_cnode *cn = NULL;
+	int count_already_incd = 0;
+	int prepared = 0;
+	BUG_ON(!th->t_trans_id);
+
+	PROC_INFO_INC(p_s_sb, journal.mark_dirty);
+	if (th->t_trans_id != journal->j_trans_id) {
+		reiserfs_panic(th->t_super,
+			       "journal-1577: handle trans id %ld != current trans id %ld\n",
+			       th->t_trans_id, journal->j_trans_id);
+	}
+
+	p_s_sb->s_dirt = 1;
+
+	prepared = test_clear_buffer_journal_prepared(bh);
+	clear_buffer_journal_restore_dirty(bh);
+	/* already in this transaction, we are done */
+	if (buffer_journaled(bh)) {
+		PROC_INFO_INC(p_s_sb, journal.mark_dirty_already);
+		return 0;
+	}
+
+	/* this must be turned into a panic instead of a warning.  We can't allow
+	 ** a dirty or journal_dirty or locked buffer to be logged, as some changes
+	 ** could get to disk too early.  NOT GOOD.
+	 */
+	if (!prepared || buffer_dirty(bh)) {
+		reiserfs_warning(p_s_sb, "journal-1777: buffer %llu bad state "
+				 "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT",
+				 (unsigned long long)bh->b_blocknr,
+				 prepared ? ' ' : '!',
+				 buffer_locked(bh) ? ' ' : '!',
+				 buffer_dirty(bh) ? ' ' : '!',
+				 buffer_journal_dirty(bh) ? ' ' : '!');
+	}
+
+	if (atomic_read(&(journal->j_wcount)) <= 0) {
+		reiserfs_warning(p_s_sb,
+				 "journal-1409: journal_mark_dirty returning because j_wcount was %d",
+				 atomic_read(&(journal->j_wcount)));
+		return 1;
+	}
+	/* this error means I've screwed up, and we've overflowed the transaction.  
+	 ** Nothing can be done here, except make the FS readonly or panic.
+	 */
+	if (journal->j_len >= journal->j_trans_max) {
+		reiserfs_panic(th->t_super,
+			       "journal-1413: journal_mark_dirty: j_len (%lu) is too big\n",
+			       journal->j_len);
+	}
+
+	if (buffer_journal_dirty(bh)) {
+		count_already_incd = 1;
+		PROC_INFO_INC(p_s_sb, journal.mark_dirty_notjournal);
+		clear_buffer_journal_dirty(bh);
+	}
+
+	if (journal->j_len > journal->j_len_alloc) {
+		journal->j_len_alloc = journal->j_len + JOURNAL_PER_BALANCE_CNT;
+	}
+
+	set_buffer_journaled(bh);
+
+	/* now put this guy on the end */
+	if (!cn) {
+		cn = get_cnode(p_s_sb);
+		if (!cn) {
+			reiserfs_panic(p_s_sb, "get_cnode failed!\n");
+		}
+
+		if (th->t_blocks_logged == th->t_blocks_allocated) {
+			th->t_blocks_allocated += JOURNAL_PER_BALANCE_CNT;
+			journal->j_len_alloc += JOURNAL_PER_BALANCE_CNT;
+		}
+		th->t_blocks_logged++;
+		journal->j_len++;
+
+		cn->bh = bh;
+		cn->blocknr = bh->b_blocknr;
+		cn->sb = p_s_sb;
+		cn->jlist = NULL;
+		insert_journal_hash(journal->j_hash_table, cn);
+		if (!count_already_incd) {
+			get_bh(bh);
+		}
+	}
+	cn->next = NULL;
+	cn->prev = journal->j_last;
+	cn->bh = bh;
+	if (journal->j_last) {
+		journal->j_last->next = cn;
+		journal->j_last = cn;
+	} else {
+		journal->j_first = cn;
+		journal->j_last = cn;
+	}
+	return 0;
+}
+
+int journal_end(struct reiserfs_transaction_handle *th,
+		struct super_block *p_s_sb, unsigned long nblocks)
+{
+	if (!current->journal_info && th->t_refcount > 1)
+		reiserfs_warning(p_s_sb, "REISER-NESTING: th NULL, refcount %d",
+				 th->t_refcount);
+
+	if (!th->t_trans_id) {
+		WARN_ON(1);
+		return -EIO;
+	}
+
+	th->t_refcount--;
+	if (th->t_refcount > 0) {
+		struct reiserfs_transaction_handle *cur_th =
+		    current->journal_info;
+
+		/* we aren't allowed to close a nested transaction on a different
+		 ** filesystem from the one in the task struct
+		 */
+		BUG_ON(cur_th->t_super != th->t_super);
+
+		if (th != cur_th) {
+			memcpy(current->journal_info, th, sizeof(*th));
+			th->t_trans_id = 0;
+		}
+		return 0;
+	} else {
+		return do_journal_end(th, p_s_sb, nblocks, 0);
+	}
+}
+
+/* removes from the current transaction, relsing and descrementing any counters.  
+** also files the removed buffer directly onto the clean list
+**
+** called by journal_mark_freed when a block has been deleted
+**
+** returns 1 if it cleaned and relsed the buffer. 0 otherwise
+*/
+static int remove_from_transaction(struct super_block *p_s_sb,
+				   b_blocknr_t blocknr, int already_cleaned)
+{
+	struct buffer_head *bh;
+	struct reiserfs_journal_cnode *cn;
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	int ret = 0;
+
+	cn = get_journal_hash_dev(p_s_sb, journal->j_hash_table, blocknr);
+	if (!cn || !cn->bh) {
+		return ret;
+	}
+	bh = cn->bh;
+	if (cn->prev) {
+		cn->prev->next = cn->next;
+	}
+	if (cn->next) {
+		cn->next->prev = cn->prev;
+	}
+	if (cn == journal->j_first) {
+		journal->j_first = cn->next;
+	}
+	if (cn == journal->j_last) {
+		journal->j_last = cn->prev;
+	}
+	if (bh)
+		remove_journal_hash(p_s_sb, journal->j_hash_table, NULL,
+				    bh->b_blocknr, 0);
+	clear_buffer_journaled(bh);	/* don't log this one */
+
+	if (!already_cleaned) {
+		clear_buffer_journal_dirty(bh);
+		clear_buffer_dirty(bh);
+		clear_buffer_journal_test(bh);
+		put_bh(bh);
+		if (atomic_read(&(bh->b_count)) < 0) {
+			reiserfs_warning(p_s_sb,
+					 "journal-1752: remove from trans, b_count < 0");
+		}
+		ret = 1;
+	}
+	journal->j_len--;
+	journal->j_len_alloc--;
+	free_cnode(p_s_sb, cn);
+	return ret;
+}
+
+/*
+** for any cnode in a journal list, it can only be dirtied of all the
+** transactions that include it are committed to disk.
+** this checks through each transaction, and returns 1 if you are allowed to dirty,
+** and 0 if you aren't
+**
+** it is called by dirty_journal_list, which is called after flush_commit_list has gotten all the log
+** blocks for a given transaction on disk
+**
+*/
+static int can_dirty(struct reiserfs_journal_cnode *cn)
+{
+	struct super_block *sb = cn->sb;
+	b_blocknr_t blocknr = cn->blocknr;
+	struct reiserfs_journal_cnode *cur = cn->hprev;
+	int can_dirty = 1;
+
+	/* first test hprev.  These are all newer than cn, so any node here
+	 ** with the same block number and dev means this node can't be sent
+	 ** to disk right now.
+	 */
+	while (cur && can_dirty) {
+		if (cur->jlist && cur->bh && cur->blocknr && cur->sb == sb &&
+		    cur->blocknr == blocknr) {
+			can_dirty = 0;
+		}
+		cur = cur->hprev;
+	}
+	/* then test hnext.  These are all older than cn.  As long as they
+	 ** are committed to the log, it is safe to write cn to disk
+	 */
+	cur = cn->hnext;
+	while (cur && can_dirty) {
+		if (cur->jlist && cur->jlist->j_len > 0 &&
+		    atomic_read(&(cur->jlist->j_commit_left)) > 0 && cur->bh &&
+		    cur->blocknr && cur->sb == sb && cur->blocknr == blocknr) {
+			can_dirty = 0;
+		}
+		cur = cur->hnext;
+	}
+	return can_dirty;
+}
+
+/* syncs the commit blocks, but does not force the real buffers to disk
+** will wait until the current transaction is done/committed before returning 
+*/
+int journal_end_sync(struct reiserfs_transaction_handle *th,
+		     struct super_block *p_s_sb, unsigned long nblocks)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+
+	BUG_ON(!th->t_trans_id);
+	/* you can sync while nested, very, very bad */
+	BUG_ON(th->t_refcount > 1);
+	if (journal->j_len == 0) {
+		reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb),
+					     1);
+		journal_mark_dirty(th, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb));
+	}
+	return do_journal_end(th, p_s_sb, nblocks, COMMIT_NOW | WAIT);
+}
+
+/*
+** writeback the pending async commits to disk
+*/
+static void flush_async_commits(struct work_struct *work)
+{
+	struct reiserfs_journal *journal =
+		container_of(work, struct reiserfs_journal, j_work.work);
+	struct super_block *p_s_sb = journal->j_work_sb;
+	struct reiserfs_journal_list *jl;
+	struct list_head *entry;
+
+	lock_kernel();
+	if (!list_empty(&journal->j_journal_list)) {
+		/* last entry is the youngest, commit it and you get everything */
+		entry = journal->j_journal_list.prev;
+		jl = JOURNAL_LIST_ENTRY(entry);
+		flush_commit_list(p_s_sb, jl, 1);
+	}
+	unlock_kernel();
+}
+
+/*
+** flushes any old transactions to disk
+** ends the current transaction if it is too old
+*/
+int reiserfs_flush_old_commits(struct super_block *p_s_sb)
+{
+	time_t now;
+	struct reiserfs_transaction_handle th;
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+
+	now = get_seconds();
+	/* safety check so we don't flush while we are replaying the log during
+	 * mount
+	 */
+	if (list_empty(&journal->j_journal_list)) {
+		return 0;
+	}
+
+	/* check the current transaction.  If there are no writers, and it is
+	 * too old, finish it, and force the commit blocks to disk
+	 */
+	if (atomic_read(&journal->j_wcount) <= 0 &&
+	    journal->j_trans_start_time > 0 &&
+	    journal->j_len > 0 &&
+	    (now - journal->j_trans_start_time) > journal->j_max_trans_age) {
+		if (!journal_join(&th, p_s_sb, 1)) {
+			reiserfs_prepare_for_journal(p_s_sb,
+						     SB_BUFFER_WITH_SB(p_s_sb),
+						     1);
+			journal_mark_dirty(&th, p_s_sb,
+					   SB_BUFFER_WITH_SB(p_s_sb));
+
+			/* we're only being called from kreiserfsd, it makes no sense to do
+			 ** an async commit so that kreiserfsd can do it later
+			 */
+			do_journal_end(&th, p_s_sb, 1, COMMIT_NOW | WAIT);
+		}
+	}
+	return p_s_sb->s_dirt;
+}
+
+/*
+** returns 0 if do_journal_end should return right away, returns 1 if do_journal_end should finish the commit
+** 
+** if the current transaction is too old, but still has writers, this will wait on j_join_wait until all 
+** the writers are done.  By the time it wakes up, the transaction it was called has already ended, so it just
+** flushes the commit list and returns 0.
+**
+** Won't batch when flush or commit_now is set.  Also won't batch when others are waiting on j_join_wait.
+** 
+** Note, we can't allow the journal_end to proceed while there are still writers in the log.
+*/
+static int check_journal_end(struct reiserfs_transaction_handle *th,
+			     struct super_block *p_s_sb, unsigned long nblocks,
+			     int flags)
+{
+
+	time_t now;
+	int flush = flags & FLUSH_ALL;
+	int commit_now = flags & COMMIT_NOW;
+	int wait_on_commit = flags & WAIT;
+	struct reiserfs_journal_list *jl;
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+
+	BUG_ON(!th->t_trans_id);
+
+	if (th->t_trans_id != journal->j_trans_id) {
+		reiserfs_panic(th->t_super,
+			       "journal-1577: handle trans id %ld != current trans id %ld\n",
+			       th->t_trans_id, journal->j_trans_id);
+	}
+
+	journal->j_len_alloc -= (th->t_blocks_allocated - th->t_blocks_logged);
+	if (atomic_read(&(journal->j_wcount)) > 0) {	/* <= 0 is allowed.  unmounting might not call begin */
+		atomic_dec(&(journal->j_wcount));
+	}
+
+	/* BUG, deal with case where j_len is 0, but people previously freed blocks need to be released 
+	 ** will be dealt with by next transaction that actually writes something, but should be taken
+	 ** care of in this trans
+	 */
+	BUG_ON(journal->j_len == 0);
+
+	/* if wcount > 0, and we are called to with flush or commit_now,
+	 ** we wait on j_join_wait.  We will wake up when the last writer has
+	 ** finished the transaction, and started it on its way to the disk.
+	 ** Then, we flush the commit or journal list, and just return 0 
+	 ** because the rest of journal end was already done for this transaction.
+	 */
+	if (atomic_read(&(journal->j_wcount)) > 0) {
+		if (flush || commit_now) {
+			unsigned trans_id;
+
+			jl = journal->j_current_jl;
+			trans_id = jl->j_trans_id;
+			if (wait_on_commit)
+				jl->j_state |= LIST_COMMIT_PENDING;
+			atomic_set(&(journal->j_jlock), 1);
+			if (flush) {
+				journal->j_next_full_flush = 1;
+			}
+			unlock_journal(p_s_sb);
+
+			/* sleep while the current transaction is still j_jlocked */
+			while (journal->j_trans_id == trans_id) {
+				if (atomic_read(&journal->j_jlock)) {
+					queue_log_writer(p_s_sb);
+				} else {
+					lock_journal(p_s_sb);
+					if (journal->j_trans_id == trans_id) {
+						atomic_set(&(journal->j_jlock),
+							   1);
+					}
+					unlock_journal(p_s_sb);
+				}
+			}
+			BUG_ON(journal->j_trans_id == trans_id);
+			
+			if (commit_now
+			    && journal_list_still_alive(p_s_sb, trans_id)
+			    && wait_on_commit) {
+				flush_commit_list(p_s_sb, jl, 1);
+			}
+			return 0;
+		}
+		unlock_journal(p_s_sb);
+		return 0;
+	}
+
+	/* deal with old transactions where we are the last writers */
+	now = get_seconds();
+	if ((now - journal->j_trans_start_time) > journal->j_max_trans_age) {
+		commit_now = 1;
+		journal->j_next_async_flush = 1;
+	}
+	/* don't batch when someone is waiting on j_join_wait */
+	/* don't batch when syncing the commit or flushing the whole trans */
+	if (!(journal->j_must_wait > 0) && !(atomic_read(&(journal->j_jlock)))
+	    && !flush && !commit_now && (journal->j_len < journal->j_max_batch)
+	    && journal->j_len_alloc < journal->j_max_batch
+	    && journal->j_cnode_free > (journal->j_trans_max * 3)) {
+		journal->j_bcount++;
+		unlock_journal(p_s_sb);
+		return 0;
+	}
+
+	if (journal->j_start > SB_ONDISK_JOURNAL_SIZE(p_s_sb)) {
+		reiserfs_panic(p_s_sb,
+			       "journal-003: journal_end: j_start (%ld) is too high\n",
+			       journal->j_start);
+	}
+	return 1;
+}
+
+/*
+** Does all the work that makes deleting blocks safe.
+** when deleting a block mark BH_JNew, just remove it from the current transaction, clean it's buffer_head and move on.
+** 
+** otherwise:
+** set a bit for the block in the journal bitmap.  That will prevent it from being allocated for unformatted nodes
+** before this transaction has finished.
+**
+** mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers.  That will prevent any old transactions with
+** this block from trying to flush to the real location.  Since we aren't removing the cnode from the journal_list_hash,
+** the block can't be reallocated yet.
+**
+** Then remove it from the current transaction, decrementing any counters and filing it on the clean list.
+*/
+int journal_mark_freed(struct reiserfs_transaction_handle *th,
+		       struct super_block *p_s_sb, b_blocknr_t blocknr)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	struct reiserfs_journal_cnode *cn = NULL;
+	struct buffer_head *bh = NULL;
+	struct reiserfs_list_bitmap *jb = NULL;
+	int cleaned = 0;
+	BUG_ON(!th->t_trans_id);
+
+	cn = get_journal_hash_dev(p_s_sb, journal->j_hash_table, blocknr);
+	if (cn && cn->bh) {
+		bh = cn->bh;
+		get_bh(bh);
+	}
+	/* if it is journal new, we just remove it from this transaction */
+	if (bh && buffer_journal_new(bh)) {
+		clear_buffer_journal_new(bh);
+		clear_prepared_bits(bh);
+		reiserfs_clean_and_file_buffer(bh);
+		cleaned = remove_from_transaction(p_s_sb, blocknr, cleaned);
+	} else {
+		/* set the bit for this block in the journal bitmap for this transaction */
+		jb = journal->j_current_jl->j_list_bitmap;
+		if (!jb) {
+			reiserfs_panic(p_s_sb,
+				       "journal-1702: journal_mark_freed, journal_list_bitmap is NULL\n");
+		}
+		set_bit_in_list_bitmap(p_s_sb, blocknr, jb);
+
+		/* Note, the entire while loop is not allowed to schedule.  */
+
+		if (bh) {
+			clear_prepared_bits(bh);
+			reiserfs_clean_and_file_buffer(bh);
+		}
+		cleaned = remove_from_transaction(p_s_sb, blocknr, cleaned);
+
+		/* find all older transactions with this block, make sure they don't try to write it out */
+		cn = get_journal_hash_dev(p_s_sb, journal->j_list_hash_table,
+					  blocknr);
+		while (cn) {
+			if (p_s_sb == cn->sb && blocknr == cn->blocknr) {
+				set_bit(BLOCK_FREED, &cn->state);
+				if (cn->bh) {
+					if (!cleaned) {
+						/* remove_from_transaction will brelse the buffer if it was 
+						 ** in the current trans
+						 */
+						clear_buffer_journal_dirty(cn->
+									   bh);
+						clear_buffer_dirty(cn->bh);
+						clear_buffer_journal_test(cn->
+									  bh);
+						cleaned = 1;
+						put_bh(cn->bh);
+						if (atomic_read
+						    (&(cn->bh->b_count)) < 0) {
+							reiserfs_warning(p_s_sb,
+									 "journal-2138: cn->bh->b_count < 0");
+						}
+					}
+					if (cn->jlist) {	/* since we are clearing the bh, we MUST dec nonzerolen */
+						atomic_dec(&
+							   (cn->jlist->
+							    j_nonzerolen));
+					}
+					cn->bh = NULL;
+				}
+			}
+			cn = cn->hnext;
+		}
+	}
+
+	if (bh)
+		release_buffer_page(bh); /* get_hash grabs the buffer */
+	return 0;
+}
+
+void reiserfs_update_inode_transaction(struct inode *inode)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(inode->i_sb);
+	REISERFS_I(inode)->i_jl = journal->j_current_jl;
+	REISERFS_I(inode)->i_trans_id = journal->j_trans_id;
+}
+
+/*
+ * returns -1 on error, 0 if no commits/barriers were done and 1
+ * if a transaction was actually committed and the barrier was done
+ */
+static int __commit_trans_jl(struct inode *inode, unsigned long id,
+			     struct reiserfs_journal_list *jl)
+{
+	struct reiserfs_transaction_handle th;
+	struct super_block *sb = inode->i_sb;
+	struct reiserfs_journal *journal = SB_JOURNAL(sb);
+	int ret = 0;
+
+	/* is it from the current transaction, or from an unknown transaction? */
+	if (id == journal->j_trans_id) {
+		jl = journal->j_current_jl;
+		/* try to let other writers come in and grow this transaction */
+		let_transaction_grow(sb, id);
+		if (journal->j_trans_id != id) {
+			goto flush_commit_only;
+		}
+
+		ret = journal_begin(&th, sb, 1);
+		if (ret)
+			return ret;
+
+		/* someone might have ended this transaction while we joined */
+		if (journal->j_trans_id != id) {
+			reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb),
+						     1);
+			journal_mark_dirty(&th, sb, SB_BUFFER_WITH_SB(sb));
+			ret = journal_end(&th, sb, 1);
+			goto flush_commit_only;
+		}
+
+		ret = journal_end_sync(&th, sb, 1);
+		if (!ret)
+			ret = 1;
+
+	} else {
+		/* this gets tricky, we have to make sure the journal list in
+		 * the inode still exists.  We know the list is still around
+		 * if we've got a larger transaction id than the oldest list
+		 */
+	      flush_commit_only:
+		if (journal_list_still_alive(inode->i_sb, id)) {
+			/*
+			 * we only set ret to 1 when we know for sure
+			 * the barrier hasn't been started yet on the commit
+			 * block.
+			 */
+			if (atomic_read(&jl->j_commit_left) > 1)
+				ret = 1;
+			flush_commit_list(sb, jl, 1);
+			if (journal->j_errno)
+				ret = journal->j_errno;
+		}
+	}
+	/* otherwise the list is gone, and long since committed */
+	return ret;
+}
+
+int reiserfs_commit_for_inode(struct inode *inode)
+{
+	unsigned long id = REISERFS_I(inode)->i_trans_id;
+	struct reiserfs_journal_list *jl = REISERFS_I(inode)->i_jl;
+
+	/* for the whole inode, assume unset id means it was
+	 * changed in the current transaction.  More conservative
+	 */
+	if (!id || !jl) {
+		reiserfs_update_inode_transaction(inode);
+		id = REISERFS_I(inode)->i_trans_id;
+		/* jl will be updated in __commit_trans_jl */
+	}
+
+	return __commit_trans_jl(inode, id, jl);
+}
+
+void reiserfs_restore_prepared_buffer(struct super_block *p_s_sb,
+				      struct buffer_head *bh)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	PROC_INFO_INC(p_s_sb, journal.restore_prepared);
+	if (!bh) {
+		return;
+	}
+	if (test_clear_buffer_journal_restore_dirty(bh) &&
+	    buffer_journal_dirty(bh)) {
+		struct reiserfs_journal_cnode *cn;
+		cn = get_journal_hash_dev(p_s_sb,
+					  journal->j_list_hash_table,
+					  bh->b_blocknr);
+		if (cn && can_dirty(cn)) {
+			set_buffer_journal_test(bh);
+			mark_buffer_dirty(bh);
+		}
+	}
+	clear_buffer_journal_prepared(bh);
+}
+
+extern struct tree_balance *cur_tb;
+/*
+** before we can change a metadata block, we have to make sure it won't
+** be written to disk while we are altering it.  So, we must:
+** clean it
+** wait on it.
+** 
+*/
+int reiserfs_prepare_for_journal(struct super_block *p_s_sb,
+				 struct buffer_head *bh, int wait)
+{
+	PROC_INFO_INC(p_s_sb, journal.prepare);
+
+	if (!trylock_buffer(bh)) {
+		if (!wait)
+			return 0;
+		lock_buffer(bh);
+	}
+	set_buffer_journal_prepared(bh);
+	if (test_clear_buffer_dirty(bh) && buffer_journal_dirty(bh)) {
+		clear_buffer_journal_test(bh);
+		set_buffer_journal_restore_dirty(bh);
+	}
+	unlock_buffer(bh);
+	return 1;
+}
+
+static void flush_old_journal_lists(struct super_block *s)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(s);
+	struct reiserfs_journal_list *jl;
+	struct list_head *entry;
+	time_t now = get_seconds();
+
+	while (!list_empty(&journal->j_journal_list)) {
+		entry = journal->j_journal_list.next;
+		jl = JOURNAL_LIST_ENTRY(entry);
+		/* this check should always be run, to send old lists to disk */
+		if (jl->j_timestamp < (now - (JOURNAL_MAX_TRANS_AGE * 4)) &&
+		    atomic_read(&jl->j_commit_left) == 0 &&
+		    test_transaction(s, jl)) {
+			flush_used_journal_lists(s, jl);
+		} else {
+			break;
+		}
+	}
+}
+
+/* 
+** long and ugly.  If flush, will not return until all commit
+** blocks and all real buffers in the trans are on disk.
+** If no_async, won't return until all commit blocks are on disk.
+**
+** keep reading, there are comments as you go along
+**
+** If the journal is aborted, we just clean up. Things like flushing
+** journal lists, etc just won't happen.
+*/
+static int do_journal_end(struct reiserfs_transaction_handle *th,
+			  struct super_block *p_s_sb, unsigned long nblocks,
+			  int flags)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb);
+	struct reiserfs_journal_cnode *cn, *next, *jl_cn;
+	struct reiserfs_journal_cnode *last_cn = NULL;
+	struct reiserfs_journal_desc *desc;
+	struct reiserfs_journal_commit *commit;
+	struct buffer_head *c_bh;	/* commit bh */
+	struct buffer_head *d_bh;	/* desc bh */
+	int cur_write_start = 0;	/* start index of current log write */
+	int old_start;
+	int i;
+	int flush;
+	int wait_on_commit;
+	struct reiserfs_journal_list *jl, *temp_jl;
+	struct list_head *entry, *safe;
+	unsigned long jindex;
+	unsigned long commit_trans_id;
+	int trans_half;
+
+	BUG_ON(th->t_refcount > 1);
+	BUG_ON(!th->t_trans_id);
+
+	/* protect flush_older_commits from doing mistakes if the
+           transaction ID counter gets overflowed.  */
+	if (th->t_trans_id == ~0UL)
+		flags |= FLUSH_ALL | COMMIT_NOW | WAIT;
+	flush = flags & FLUSH_ALL;
+	wait_on_commit = flags & WAIT;
+
+	put_fs_excl();
+	current->journal_info = th->t_handle_save;
+	reiserfs_check_lock_depth(p_s_sb, "journal end");
+	if (journal->j_len == 0) {
+		reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb),
+					     1);
+		journal_mark_dirty(th, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb));
+	}
+
+	lock_journal(p_s_sb);
+	if (journal->j_next_full_flush) {
+		flags |= FLUSH_ALL;
+		flush = 1;
+	}
+	if (journal->j_next_async_flush) {
+		flags |= COMMIT_NOW | WAIT;
+		wait_on_commit = 1;
+	}
+
+	/* check_journal_end locks the journal, and unlocks if it does not return 1 
+	 ** it tells us if we should continue with the journal_end, or just return
+	 */
+	if (!check_journal_end(th, p_s_sb, nblocks, flags)) {
+		p_s_sb->s_dirt = 1;
+		wake_queued_writers(p_s_sb);
+		reiserfs_async_progress_wait(p_s_sb);
+		goto out;
+	}
+
+	/* check_journal_end might set these, check again */
+	if (journal->j_next_full_flush) {
+		flush = 1;
+	}
+
+	/*
+	 ** j must wait means we have to flush the log blocks, and the real blocks for
+	 ** this transaction
+	 */
+	if (journal->j_must_wait > 0) {
+		flush = 1;
+	}
+#ifdef REISERFS_PREALLOCATE
+	/* quota ops might need to nest, setup the journal_info pointer for them
+	 * and raise the refcount so that it is > 0. */
+	current->journal_info = th;
+	th->t_refcount++;
+	reiserfs_discard_all_prealloc(th);	/* it should not involve new blocks into
+						 * the transaction */
+	th->t_refcount--;
+	current->journal_info = th->t_handle_save;
+#endif
+
+	/* setup description block */
+	d_bh =
+	    journal_getblk(p_s_sb,
+			   SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) +
+			   journal->j_start);
+	set_buffer_uptodate(d_bh);
+	desc = (struct reiserfs_journal_desc *)(d_bh)->b_data;
+	memset(d_bh->b_data, 0, d_bh->b_size);
+	memcpy(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8);
+	set_desc_trans_id(desc, journal->j_trans_id);
+
+	/* setup commit block.  Don't write (keep it clean too) this one until after everyone else is written */
+	c_bh = journal_getblk(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) +
+			      ((journal->j_start + journal->j_len +
+				1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb)));
+	commit = (struct reiserfs_journal_commit *)c_bh->b_data;
+	memset(c_bh->b_data, 0, c_bh->b_size);
+	set_commit_trans_id(commit, journal->j_trans_id);
+	set_buffer_uptodate(c_bh);
+
+	/* init this journal list */
+	jl = journal->j_current_jl;
+
+	/* we lock the commit before doing anything because
+	 * we want to make sure nobody tries to run flush_commit_list until
+	 * the new transaction is fully setup, and we've already flushed the
+	 * ordered bh list
+	 */
+	mutex_lock(&jl->j_commit_mutex);
+
+	/* save the transaction id in case we need to commit it later */
+	commit_trans_id = jl->j_trans_id;
+
+	atomic_set(&jl->j_older_commits_done, 0);
+	jl->j_trans_id = journal->j_trans_id;
+	jl->j_timestamp = journal->j_trans_start_time;
+	jl->j_commit_bh = c_bh;
+	jl->j_start = journal->j_start;
+	jl->j_len = journal->j_len;
+	atomic_set(&jl->j_nonzerolen, journal->j_len);
+	atomic_set(&jl->j_commit_left, journal->j_len + 2);
+	jl->j_realblock = NULL;
+
+	/* The ENTIRE FOR LOOP MUST not cause schedule to occur.
+	 **  for each real block, add it to the journal list hash,
+	 ** copy into real block index array in the commit or desc block
+	 */
+	trans_half = journal_trans_half(p_s_sb->s_blocksize);
+	for (i = 0, cn = journal->j_first; cn; cn = cn->next, i++) {
+		if (buffer_journaled(cn->bh)) {
+			jl_cn = get_cnode(p_s_sb);
+			if (!jl_cn) {
+				reiserfs_panic(p_s_sb,
+					       "journal-1676, get_cnode returned NULL\n");
+			}
+			if (i == 0) {
+				jl->j_realblock = jl_cn;
+			}
+			jl_cn->prev = last_cn;
+			jl_cn->next = NULL;
+			if (last_cn) {
+				last_cn->next = jl_cn;
+			}
+			last_cn = jl_cn;
+			/* make sure the block we are trying to log is not a block 
+			   of journal or reserved area */
+
+			if (is_block_in_log_or_reserved_area
+			    (p_s_sb, cn->bh->b_blocknr)) {
+				reiserfs_panic(p_s_sb,
+					       "journal-2332: Trying to log block %lu, which is a log block\n",
+					       cn->bh->b_blocknr);
+			}
+			jl_cn->blocknr = cn->bh->b_blocknr;
+			jl_cn->state = 0;
+			jl_cn->sb = p_s_sb;
+			jl_cn->bh = cn->bh;
+			jl_cn->jlist = jl;
+			insert_journal_hash(journal->j_list_hash_table, jl_cn);
+			if (i < trans_half) {
+				desc->j_realblock[i] =
+				    cpu_to_le32(cn->bh->b_blocknr);
+			} else {
+				commit->j_realblock[i - trans_half] =
+				    cpu_to_le32(cn->bh->b_blocknr);
+			}
+		} else {
+			i--;
+		}
+	}
+	set_desc_trans_len(desc, journal->j_len);
+	set_desc_mount_id(desc, journal->j_mount_id);
+	set_desc_trans_id(desc, journal->j_trans_id);
+	set_commit_trans_len(commit, journal->j_len);
+
+	/* special check in case all buffers in the journal were marked for not logging */
+	BUG_ON(journal->j_len == 0);
+
+	/* we're about to dirty all the log blocks, mark the description block
+	 * dirty now too.  Don't mark the commit block dirty until all the
+	 * others are on disk
+	 */
+	mark_buffer_dirty(d_bh);
+
+	/* first data block is j_start + 1, so add one to cur_write_start wherever you use it */
+	cur_write_start = journal->j_start;
+	cn = journal->j_first;
+	jindex = 1;		/* start at one so we don't get the desc again */
+	while (cn) {
+		clear_buffer_journal_new(cn->bh);
+		/* copy all the real blocks into log area.  dirty log blocks */
+		if (buffer_journaled(cn->bh)) {
+			struct buffer_head *tmp_bh;
+			char *addr;
+			struct page *page;
+			tmp_bh =
+			    journal_getblk(p_s_sb,
+					   SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) +
+					   ((cur_write_start +
+					     jindex) %
+					    SB_ONDISK_JOURNAL_SIZE(p_s_sb)));
+			set_buffer_uptodate(tmp_bh);
+			page = cn->bh->b_page;
+			addr = kmap(page);
+			memcpy(tmp_bh->b_data,
+			       addr + offset_in_page(cn->bh->b_data),
+			       cn->bh->b_size);
+			kunmap(page);
+			mark_buffer_dirty(tmp_bh);
+			jindex++;
+			set_buffer_journal_dirty(cn->bh);
+			clear_buffer_journaled(cn->bh);
+		} else {
+			/* JDirty cleared sometime during transaction.  don't log this one */
+			reiserfs_warning(p_s_sb,
+					 "journal-2048: do_journal_end: BAD, buffer in journal hash, but not JDirty!");
+			brelse(cn->bh);
+		}
+		next = cn->next;
+		free_cnode(p_s_sb, cn);
+		cn = next;
+		cond_resched();
+	}
+
+	/* we are done  with both the c_bh and d_bh, but
+	 ** c_bh must be written after all other commit blocks,
+	 ** so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1.
+	 */
+
+	journal->j_current_jl = alloc_journal_list(p_s_sb);
+
+	/* now it is safe to insert this transaction on the main list */
+	list_add_tail(&jl->j_list, &journal->j_journal_list);
+	list_add_tail(&jl->j_working_list, &journal->j_working_list);
+	journal->j_num_work_lists++;
+
+	/* reset journal values for the next transaction */
+	old_start = journal->j_start;
+	journal->j_start =
+	    (journal->j_start + journal->j_len +
+	     2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb);
+	atomic_set(&(journal->j_wcount), 0);
+	journal->j_bcount = 0;
+	journal->j_last = NULL;
+	journal->j_first = NULL;
+	journal->j_len = 0;
+	journal->j_trans_start_time = 0;
+	/* check for trans_id overflow */
+	if (++journal->j_trans_id == 0)
+		journal->j_trans_id = 10;
+	journal->j_current_jl->j_trans_id = journal->j_trans_id;
+	journal->j_must_wait = 0;
+	journal->j_len_alloc = 0;
+	journal->j_next_full_flush = 0;
+	journal->j_next_async_flush = 0;
+	init_journal_hash(p_s_sb);
+
+	// make sure reiserfs_add_jh sees the new current_jl before we
+	// write out the tails
+	smp_mb();
+
+	/* tail conversion targets have to hit the disk before we end the
+	 * transaction.  Otherwise a later transaction might repack the tail
+	 * before this transaction commits, leaving the data block unflushed and
+	 * clean, if we crash before the later transaction commits, the data block
+	 * is lost.
+	 */
+	if (!list_empty(&jl->j_tail_bh_list)) {
+		unlock_kernel();
+		write_ordered_buffers(&journal->j_dirty_buffers_lock,
+				      journal, jl, &jl->j_tail_bh_list);
+		lock_kernel();
+	}
+	BUG_ON(!list_empty(&jl->j_tail_bh_list));
+	mutex_unlock(&jl->j_commit_mutex);
+
+	/* honor the flush wishes from the caller, simple commits can
+	 ** be done outside the journal lock, they are done below
+	 **
+	 ** if we don't flush the commit list right now, we put it into
+	 ** the work queue so the people waiting on the async progress work
+	 ** queue don't wait for this proc to flush journal lists and such.
+	 */
+	if (flush) {
+		flush_commit_list(p_s_sb, jl, 1);
+		flush_journal_list(p_s_sb, jl, 1);
+	} else if (!(jl->j_state & LIST_COMMIT_PENDING))
+		queue_delayed_work(commit_wq, &journal->j_work, HZ / 10);
+
+	/* if the next transaction has any chance of wrapping, flush 
+	 ** transactions that might get overwritten.  If any journal lists are very 
+	 ** old flush them as well.  
+	 */
+      first_jl:
+	list_for_each_safe(entry, safe, &journal->j_journal_list) {
+		temp_jl = JOURNAL_LIST_ENTRY(entry);
+		if (journal->j_start <= temp_jl->j_start) {
+			if ((journal->j_start + journal->j_trans_max + 1) >=
+			    temp_jl->j_start) {
+				flush_used_journal_lists(p_s_sb, temp_jl);
+				goto first_jl;
+			} else if ((journal->j_start +
+				    journal->j_trans_max + 1) <
+				   SB_ONDISK_JOURNAL_SIZE(p_s_sb)) {
+				/* if we don't cross into the next transaction and we don't
+				 * wrap, there is no way we can overlap any later transactions
+				 * break now
+				 */
+				break;
+			}
+		} else if ((journal->j_start +
+			    journal->j_trans_max + 1) >
+			   SB_ONDISK_JOURNAL_SIZE(p_s_sb)) {
+			if (((journal->j_start + journal->j_trans_max + 1) %
+			     SB_ONDISK_JOURNAL_SIZE(p_s_sb)) >=
+			    temp_jl->j_start) {
+				flush_used_journal_lists(p_s_sb, temp_jl);
+				goto first_jl;
+			} else {
+				/* we don't overlap anything from out start to the end of the
+				 * log, and our wrapped portion doesn't overlap anything at
+				 * the start of the log.  We can break
+				 */
+				break;
+			}
+		}
+	}
+	flush_old_journal_lists(p_s_sb);
+
+	journal->j_current_jl->j_list_bitmap =
+	    get_list_bitmap(p_s_sb, journal->j_current_jl);
+
+	if (!(journal->j_current_jl->j_list_bitmap)) {
+		reiserfs_panic(p_s_sb,
+			       "journal-1996: do_journal_end, could not get a list bitmap\n");
+	}
+
+	atomic_set(&(journal->j_jlock), 0);
+	unlock_journal(p_s_sb);
+	/* wake up any body waiting to join. */
+	clear_bit(J_WRITERS_QUEUED, &journal->j_state);
+	wake_up(&(journal->j_join_wait));
+
+	if (!flush && wait_on_commit &&
+	    journal_list_still_alive(p_s_sb, commit_trans_id)) {
+		flush_commit_list(p_s_sb, jl, 1);
+	}
+      out:
+	reiserfs_check_lock_depth(p_s_sb, "journal end2");
+
+	memset(th, 0, sizeof(*th));
+	/* Re-set th->t_super, so we can properly keep track of how many
+	 * persistent transactions there are. We need to do this so if this
+	 * call is part of a failed restart_transaction, we can free it later */
+	th->t_super = p_s_sb;
+
+	return journal->j_errno;
+}
+
+static void __reiserfs_journal_abort_hard(struct super_block *sb)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(sb);
+	if (test_bit(J_ABORTED, &journal->j_state))
+		return;
+
+	printk(KERN_CRIT "REISERFS: Aborting journal for filesystem on %s\n",
+	       reiserfs_bdevname(sb));
+
+	sb->s_flags |= MS_RDONLY;
+	set_bit(J_ABORTED, &journal->j_state);
+
+#ifdef CONFIG_REISERFS_CHECK
+	dump_stack();
+#endif
+}
+
+static void __reiserfs_journal_abort_soft(struct super_block *sb, int errno)
+{
+	struct reiserfs_journal *journal = SB_JOURNAL(sb);
+	if (test_bit(J_ABORTED, &journal->j_state))
+		return;
+
+	if (!journal->j_errno)
+		journal->j_errno = errno;
+
+	__reiserfs_journal_abort_hard(sb);
+}
+
+void reiserfs_journal_abort(struct super_block *sb, int errno)
+{
+	__reiserfs_journal_abort_soft(sb, errno);
+}
diff --git a/fs/reiserfs/lbalance.c b/fs/reiserfs/lbalance.c
new file mode 100644
index 0000000..6de060a
--- /dev/null
+++ b/fs/reiserfs/lbalance.c
@@ -0,0 +1,1301 @@
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ */
+
+#include <asm/uaccess.h>
+#include <linux/string.h>
+#include <linux/time.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/buffer_head.h>
+
+/* these are used in do_balance.c */
+
+/* leaf_move_items
+   leaf_shift_left
+   leaf_shift_right
+   leaf_delete_items
+   leaf_insert_into_buf
+   leaf_paste_in_buffer
+   leaf_cut_from_buffer
+   leaf_paste_entries
+   */
+
+/* copy copy_count entries from source directory item to dest buffer (creating new item if needed) */
+static void leaf_copy_dir_entries(struct buffer_info *dest_bi,
+				  struct buffer_head *source, int last_first,
+				  int item_num, int from, int copy_count)
+{
+	struct buffer_head *dest = dest_bi->bi_bh;
+	int item_num_in_dest;	/* either the number of target item,
+				   or if we must create a new item,
+				   the number of the item we will
+				   create it next to */
+	struct item_head *ih;
+	struct reiserfs_de_head *deh;
+	int copy_records_len;	/* length of all records in item to be copied */
+	char *records;
+
+	ih = B_N_PITEM_HEAD(source, item_num);
+
+	RFALSE(!is_direntry_le_ih(ih), "vs-10000: item must be directory item");
+
+	/* length of all record to be copied and first byte of the last of them */
+	deh = B_I_DEH(source, ih);
+	if (copy_count) {
+		copy_records_len = (from ? deh_location(&(deh[from - 1])) :
+				    ih_item_len(ih)) -
+		    deh_location(&(deh[from + copy_count - 1]));
+		records =
+		    source->b_data + ih_location(ih) +
+		    deh_location(&(deh[from + copy_count - 1]));
+	} else {
+		copy_records_len = 0;
+		records = NULL;
+	}
+
+	/* when copy last to first, dest buffer can contain 0 items */
+	item_num_in_dest =
+	    (last_first ==
+	     LAST_TO_FIRST) ? ((B_NR_ITEMS(dest)) ? 0 : -1) : (B_NR_ITEMS(dest)
+							       - 1);
+
+	/* if there are no items in dest or the first/last item in dest is not item of the same directory */
+	if ((item_num_in_dest == -1) ||
+	    (last_first == FIRST_TO_LAST && le_ih_k_offset(ih) == DOT_OFFSET) ||
+	    (last_first == LAST_TO_FIRST
+	     && comp_short_le_keys /*COMP_SHORT_KEYS */ (&ih->ih_key,
+							 B_N_PKEY(dest,
+								  item_num_in_dest))))
+	{
+		/* create new item in dest */
+		struct item_head new_ih;
+
+		/* form item header */
+		memcpy(&new_ih.ih_key, &ih->ih_key, KEY_SIZE);
+		put_ih_version(&new_ih, KEY_FORMAT_3_5);
+		/* calculate item len */
+		put_ih_item_len(&new_ih,
+				DEH_SIZE * copy_count + copy_records_len);
+		put_ih_entry_count(&new_ih, 0);
+
+		if (last_first == LAST_TO_FIRST) {
+			/* form key by the following way */
+			if (from < I_ENTRY_COUNT(ih)) {
+				set_le_ih_k_offset(&new_ih,
+						   deh_offset(&(deh[from])));
+				/*memcpy (&new_ih.ih_key.k_offset, &deh[from].deh_offset, SHORT_KEY_SIZE); */
+			} else {
+				/* no entries will be copied to this item in this function */
+				set_le_ih_k_offset(&new_ih, U32_MAX);
+				/* this item is not yet valid, but we want I_IS_DIRECTORY_ITEM to return 1 for it, so we -1 */
+			}
+			set_le_key_k_type(KEY_FORMAT_3_5, &(new_ih.ih_key),
+					  TYPE_DIRENTRY);
+		}
+
+		/* insert item into dest buffer */
+		leaf_insert_into_buf(dest_bi,
+				     (last_first ==
+				      LAST_TO_FIRST) ? 0 : B_NR_ITEMS(dest),
+				     &new_ih, NULL, 0);
+	} else {
+		/* prepare space for entries */
+		leaf_paste_in_buffer(dest_bi,
+				     (last_first ==
+				      FIRST_TO_LAST) ? (B_NR_ITEMS(dest) -
+							1) : 0, MAX_US_INT,
+				     DEH_SIZE * copy_count + copy_records_len,
+				     records, 0);
+	}
+
+	item_num_in_dest =
+	    (last_first == FIRST_TO_LAST) ? (B_NR_ITEMS(dest) - 1) : 0;
+
+	leaf_paste_entries(dest_bi->bi_bh, item_num_in_dest,
+			   (last_first ==
+			    FIRST_TO_LAST) ? I_ENTRY_COUNT(B_N_PITEM_HEAD(dest,
+									  item_num_in_dest))
+			   : 0, copy_count, deh + from, records,
+			   DEH_SIZE * copy_count + copy_records_len);
+}
+
+/* Copy the first (if last_first == FIRST_TO_LAST) or last (last_first == LAST_TO_FIRST) item or 
+   part of it or nothing (see the return 0 below) from SOURCE to the end 
+   (if last_first) or beginning (!last_first) of the DEST */
+/* returns 1 if anything was copied, else 0 */
+static int leaf_copy_boundary_item(struct buffer_info *dest_bi,
+				   struct buffer_head *src, int last_first,
+				   int bytes_or_entries)
+{
+	struct buffer_head *dest = dest_bi->bi_bh;
+	int dest_nr_item, src_nr_item;	/* number of items in the source and destination buffers */
+	struct item_head *ih;
+	struct item_head *dih;
+
+	dest_nr_item = B_NR_ITEMS(dest);
+
+	if (last_first == FIRST_TO_LAST) {
+		/* if ( DEST is empty or first item of SOURCE and last item of DEST are the items of different objects
+		   or of different types ) then there is no need to treat this item differently from the other items
+		   that we copy, so we return */
+		ih = B_N_PITEM_HEAD(src, 0);
+		dih = B_N_PITEM_HEAD(dest, dest_nr_item - 1);
+		if (!dest_nr_item
+		    || (!op_is_left_mergeable(&(ih->ih_key), src->b_size)))
+			/* there is nothing to merge */
+			return 0;
+
+		RFALSE(!ih_item_len(ih),
+		       "vs-10010: item can not have empty length");
+
+		if (is_direntry_le_ih(ih)) {
+			if (bytes_or_entries == -1)
+				/* copy all entries to dest */
+				bytes_or_entries = ih_entry_count(ih);
+			leaf_copy_dir_entries(dest_bi, src, FIRST_TO_LAST, 0, 0,
+					      bytes_or_entries);
+			return 1;
+		}
+
+		/* copy part of the body of the first item of SOURCE to the end of the body of the last item of the DEST
+		   part defined by 'bytes_or_entries'; if bytes_or_entries == -1 copy whole body; don't create new item header
+		 */
+		if (bytes_or_entries == -1)
+			bytes_or_entries = ih_item_len(ih);
+
+#ifdef CONFIG_REISERFS_CHECK
+		else {
+			if (bytes_or_entries == ih_item_len(ih)
+			    && is_indirect_le_ih(ih))
+				if (get_ih_free_space(ih))
+					reiserfs_panic(NULL,
+						       "vs-10020: leaf_copy_boundary_item: "
+						       "last unformatted node must be filled entirely (%h)",
+						       ih);
+		}
+#endif
+
+		/* merge first item (or its part) of src buffer with the last
+		   item of dest buffer. Both are of the same file */
+		leaf_paste_in_buffer(dest_bi,
+				     dest_nr_item - 1, ih_item_len(dih),
+				     bytes_or_entries, B_I_PITEM(src, ih), 0);
+
+		if (is_indirect_le_ih(dih)) {
+			RFALSE(get_ih_free_space(dih),
+			       "vs-10030: merge to left: last unformatted node of non-last indirect item %h must have zerto free space",
+			       ih);
+			if (bytes_or_entries == ih_item_len(ih))
+				set_ih_free_space(dih, get_ih_free_space(ih));
+		}
+
+		return 1;
+	}
+
+	/* copy boundary item to right (last_first == LAST_TO_FIRST) */
+
+	/* ( DEST is empty or last item of SOURCE and first item of DEST
+	   are the items of different object or of different types )
+	 */
+	src_nr_item = B_NR_ITEMS(src);
+	ih = B_N_PITEM_HEAD(src, src_nr_item - 1);
+	dih = B_N_PITEM_HEAD(dest, 0);
+
+	if (!dest_nr_item || !op_is_left_mergeable(&(dih->ih_key), src->b_size))
+		return 0;
+
+	if (is_direntry_le_ih(ih)) {
+		if (bytes_or_entries == -1)
+			/* bytes_or_entries = entries number in last item body of SOURCE */
+			bytes_or_entries = ih_entry_count(ih);
+
+		leaf_copy_dir_entries(dest_bi, src, LAST_TO_FIRST,
+				      src_nr_item - 1,
+				      ih_entry_count(ih) - bytes_or_entries,
+				      bytes_or_entries);
+		return 1;
+	}
+
+	/* copy part of the body of the last item of SOURCE to the begin of the body of the first item of the DEST;
+	   part defined by 'bytes_or_entries'; if byte_or_entriess == -1 copy whole body; change first item key of the DEST;
+	   don't create new item header
+	 */
+
+	RFALSE(is_indirect_le_ih(ih) && get_ih_free_space(ih),
+	       "vs-10040: merge to right: last unformatted node of non-last indirect item must be filled entirely (%h)",
+	       ih);
+
+	if (bytes_or_entries == -1) {
+		/* bytes_or_entries = length of last item body of SOURCE */
+		bytes_or_entries = ih_item_len(ih);
+
+		RFALSE(le_ih_k_offset(dih) !=
+		       le_ih_k_offset(ih) + op_bytes_number(ih, src->b_size),
+		       "vs-10050: items %h and %h do not match", ih, dih);
+
+		/* change first item key of the DEST */
+		set_le_ih_k_offset(dih, le_ih_k_offset(ih));
+
+		/* item becomes non-mergeable */
+		/* or mergeable if left item was */
+		set_le_ih_k_type(dih, le_ih_k_type(ih));
+	} else {
+		/* merge to right only part of item */
+		RFALSE(ih_item_len(ih) <= bytes_or_entries,
+		       "vs-10060: no so much bytes %lu (needed %lu)",
+		       (unsigned long)ih_item_len(ih),
+		       (unsigned long)bytes_or_entries);
+
+		/* change first item key of the DEST */
+		if (is_direct_le_ih(dih)) {
+			RFALSE(le_ih_k_offset(dih) <=
+			       (unsigned long)bytes_or_entries,
+			       "vs-10070: dih %h, bytes_or_entries(%d)", dih,
+			       bytes_or_entries);
+			set_le_ih_k_offset(dih,
+					   le_ih_k_offset(dih) -
+					   bytes_or_entries);
+		} else {
+			RFALSE(le_ih_k_offset(dih) <=
+			       (bytes_or_entries / UNFM_P_SIZE) * dest->b_size,
+			       "vs-10080: dih %h, bytes_or_entries(%d)",
+			       dih,
+			       (bytes_or_entries / UNFM_P_SIZE) * dest->b_size);
+			set_le_ih_k_offset(dih,
+					   le_ih_k_offset(dih) -
+					   ((bytes_or_entries / UNFM_P_SIZE) *
+					    dest->b_size));
+		}
+	}
+
+	leaf_paste_in_buffer(dest_bi, 0, 0, bytes_or_entries,
+			     B_I_PITEM(src,
+				       ih) + ih_item_len(ih) - bytes_or_entries,
+			     0);
+	return 1;
+}
+
+/* copy cpy_mun items from buffer src to buffer dest
+ * last_first == FIRST_TO_LAST means, that we copy cpy_num  items beginning from first-th item in src to tail of dest
+ * last_first == LAST_TO_FIRST means, that we copy cpy_num  items beginning from first-th item in src to head of dest
+ */
+static void leaf_copy_items_entirely(struct buffer_info *dest_bi,
+				     struct buffer_head *src, int last_first,
+				     int first, int cpy_num)
+{
+	struct buffer_head *dest;
+	int nr, free_space;
+	int dest_before;
+	int last_loc, last_inserted_loc, location;
+	int i, j;
+	struct block_head *blkh;
+	struct item_head *ih;
+
+	RFALSE(last_first != LAST_TO_FIRST && last_first != FIRST_TO_LAST,
+	       "vs-10090: bad last_first parameter %d", last_first);
+	RFALSE(B_NR_ITEMS(src) - first < cpy_num,
+	       "vs-10100: too few items in source %d, required %d from %d",
+	       B_NR_ITEMS(src), cpy_num, first);
+	RFALSE(cpy_num < 0, "vs-10110: can not copy negative amount of items");
+	RFALSE(!dest_bi, "vs-10120: can not copy negative amount of items");
+
+	dest = dest_bi->bi_bh;
+
+	RFALSE(!dest, "vs-10130: can not copy negative amount of items");
+
+	if (cpy_num == 0)
+		return;
+
+	blkh = B_BLK_HEAD(dest);
+	nr = blkh_nr_item(blkh);
+	free_space = blkh_free_space(blkh);
+
+	/* we will insert items before 0-th or nr-th item in dest buffer. It depends of last_first parameter */
+	dest_before = (last_first == LAST_TO_FIRST) ? 0 : nr;
+
+	/* location of head of first new item */
+	ih = B_N_PITEM_HEAD(dest, dest_before);
+
+	RFALSE(blkh_free_space(blkh) < cpy_num * IH_SIZE,
+	       "vs-10140: not enough free space for headers %d (needed %d)",
+	       B_FREE_SPACE(dest), cpy_num * IH_SIZE);
+
+	/* prepare space for headers */
+	memmove(ih + cpy_num, ih, (nr - dest_before) * IH_SIZE);
+
+	/* copy item headers */
+	memcpy(ih, B_N_PITEM_HEAD(src, first), cpy_num * IH_SIZE);
+
+	free_space -= (IH_SIZE * cpy_num);
+	set_blkh_free_space(blkh, free_space);
+
+	/* location of unmovable item */
+	j = location = (dest_before == 0) ? dest->b_size : ih_location(ih - 1);
+	for (i = dest_before; i < nr + cpy_num; i++) {
+		location -= ih_item_len(ih + i - dest_before);
+		put_ih_location(ih + i - dest_before, location);
+	}
+
+	/* prepare space for items */
+	last_loc = ih_location(&(ih[nr + cpy_num - 1 - dest_before]));
+	last_inserted_loc = ih_location(&(ih[cpy_num - 1]));
+
+	/* check free space */
+	RFALSE(free_space < j - last_inserted_loc,
+	       "vs-10150: not enough free space for items %d (needed %d)",
+	       free_space, j - last_inserted_loc);
+
+	memmove(dest->b_data + last_loc,
+		dest->b_data + last_loc + j - last_inserted_loc,
+		last_inserted_loc - last_loc);
+
+	/* copy items */
+	memcpy(dest->b_data + last_inserted_loc,
+	       B_N_PITEM(src, (first + cpy_num - 1)), j - last_inserted_loc);
+
+	/* sizes, item number */
+	set_blkh_nr_item(blkh, nr + cpy_num);
+	set_blkh_free_space(blkh, free_space - (j - last_inserted_loc));
+
+	do_balance_mark_leaf_dirty(dest_bi->tb, dest, 0);
+
+	if (dest_bi->bi_parent) {
+		struct disk_child *t_dc;
+		t_dc = B_N_CHILD(dest_bi->bi_parent, dest_bi->bi_position);
+		RFALSE(dc_block_number(t_dc) != dest->b_blocknr,
+		       "vs-10160: block number in bh does not match to field in disk_child structure %lu and %lu",
+		       (long unsigned)dest->b_blocknr,
+		       (long unsigned)dc_block_number(t_dc));
+		put_dc_size(t_dc,
+			    dc_size(t_dc) + (j - last_inserted_loc +
+					     IH_SIZE * cpy_num));
+
+		do_balance_mark_internal_dirty(dest_bi->tb, dest_bi->bi_parent,
+					       0);
+	}
+}
+
+/* This function splits the (liquid) item into two items (useful when
+   shifting part of an item into another node.) */
+static void leaf_item_bottle(struct buffer_info *dest_bi,
+			     struct buffer_head *src, int last_first,
+			     int item_num, int cpy_bytes)
+{
+	struct buffer_head *dest = dest_bi->bi_bh;
+	struct item_head *ih;
+
+	RFALSE(cpy_bytes == -1,
+	       "vs-10170: bytes == - 1 means: do not split item");
+
+	if (last_first == FIRST_TO_LAST) {
+		/* if ( if item in position item_num in buffer SOURCE is directory item ) */
+		if (is_direntry_le_ih(ih = B_N_PITEM_HEAD(src, item_num)))
+			leaf_copy_dir_entries(dest_bi, src, FIRST_TO_LAST,
+					      item_num, 0, cpy_bytes);
+		else {
+			struct item_head n_ih;
+
+			/* copy part of the body of the item number 'item_num' of SOURCE to the end of the DEST 
+			   part defined by 'cpy_bytes'; create new item header; change old item_header (????);
+			   n_ih = new item_header;
+			 */
+			memcpy(&n_ih, ih, IH_SIZE);
+			put_ih_item_len(&n_ih, cpy_bytes);
+			if (is_indirect_le_ih(ih)) {
+				RFALSE(cpy_bytes == ih_item_len(ih)
+				       && get_ih_free_space(ih),
+				       "vs-10180: when whole indirect item is bottle to left neighbor, it must have free_space==0 (not %lu)",
+				       (long unsigned)get_ih_free_space(ih));
+				set_ih_free_space(&n_ih, 0);
+			}
+
+			RFALSE(op_is_left_mergeable(&(ih->ih_key), src->b_size),
+			       "vs-10190: bad mergeability of item %h", ih);
+			n_ih.ih_version = ih->ih_version;	/* JDM Endian safe, both le */
+			leaf_insert_into_buf(dest_bi, B_NR_ITEMS(dest), &n_ih,
+					     B_N_PITEM(src, item_num), 0);
+		}
+	} else {
+		/*  if ( if item in position item_num in buffer SOURCE is directory item ) */
+		if (is_direntry_le_ih(ih = B_N_PITEM_HEAD(src, item_num)))
+			leaf_copy_dir_entries(dest_bi, src, LAST_TO_FIRST,
+					      item_num,
+					      I_ENTRY_COUNT(ih) - cpy_bytes,
+					      cpy_bytes);
+		else {
+			struct item_head n_ih;
+
+			/* copy part of the body of the item number 'item_num' of SOURCE to the begin of the DEST 
+			   part defined by 'cpy_bytes'; create new item header;
+			   n_ih = new item_header;
+			 */
+			memcpy(&n_ih, ih, SHORT_KEY_SIZE);
+
+			n_ih.ih_version = ih->ih_version;	/* JDM Endian safe, both le */
+
+			if (is_direct_le_ih(ih)) {
+				set_le_ih_k_offset(&n_ih,
+						   le_ih_k_offset(ih) +
+						   ih_item_len(ih) - cpy_bytes);
+				set_le_ih_k_type(&n_ih, TYPE_DIRECT);
+				set_ih_free_space(&n_ih, MAX_US_INT);
+			} else {
+				/* indirect item */
+				RFALSE(!cpy_bytes && get_ih_free_space(ih),
+				       "vs-10200: ih->ih_free_space must be 0 when indirect item will be appended");
+				set_le_ih_k_offset(&n_ih,
+						   le_ih_k_offset(ih) +
+						   (ih_item_len(ih) -
+						    cpy_bytes) / UNFM_P_SIZE *
+						   dest->b_size);
+				set_le_ih_k_type(&n_ih, TYPE_INDIRECT);
+				set_ih_free_space(&n_ih, get_ih_free_space(ih));
+			}
+
+			/* set item length */
+			put_ih_item_len(&n_ih, cpy_bytes);
+
+			n_ih.ih_version = ih->ih_version;	/* JDM Endian safe, both le */
+
+			leaf_insert_into_buf(dest_bi, 0, &n_ih,
+					     B_N_PITEM(src,
+						       item_num) +
+					     ih_item_len(ih) - cpy_bytes, 0);
+		}
+	}
+}
+
+/* If cpy_bytes equals minus one than copy cpy_num whole items from SOURCE to DEST.
+   If cpy_bytes not equal to minus one than copy cpy_num-1 whole items from SOURCE to DEST.
+   From last item copy cpy_num bytes for regular item and cpy_num directory entries for
+   directory item. */
+static int leaf_copy_items(struct buffer_info *dest_bi, struct buffer_head *src,
+			   int last_first, int cpy_num, int cpy_bytes)
+{
+	struct buffer_head *dest;
+	int pos, i, src_nr_item, bytes;
+
+	dest = dest_bi->bi_bh;
+	RFALSE(!dest || !src, "vs-10210: !dest || !src");
+	RFALSE(last_first != FIRST_TO_LAST && last_first != LAST_TO_FIRST,
+	       "vs-10220:last_first != FIRST_TO_LAST && last_first != LAST_TO_FIRST");
+	RFALSE(B_NR_ITEMS(src) < cpy_num,
+	       "vs-10230: No enough items: %d, req. %d", B_NR_ITEMS(src),
+	       cpy_num);
+	RFALSE(cpy_num < 0, "vs-10240: cpy_num < 0 (%d)", cpy_num);
+
+	if (cpy_num == 0)
+		return 0;
+
+	if (last_first == FIRST_TO_LAST) {
+		/* copy items to left */
+		pos = 0;
+		if (cpy_num == 1)
+			bytes = cpy_bytes;
+		else
+			bytes = -1;
+
+		/* copy the first item or it part or nothing to the end of the DEST (i = leaf_copy_boundary_item(DEST,SOURCE,0,bytes)) */
+		i = leaf_copy_boundary_item(dest_bi, src, FIRST_TO_LAST, bytes);
+		cpy_num -= i;
+		if (cpy_num == 0)
+			return i;
+		pos += i;
+		if (cpy_bytes == -1)
+			/* copy first cpy_num items starting from position 'pos' of SOURCE to end of DEST */
+			leaf_copy_items_entirely(dest_bi, src, FIRST_TO_LAST,
+						 pos, cpy_num);
+		else {
+			/* copy first cpy_num-1 items starting from position 'pos-1' of the SOURCE to the end of the DEST */
+			leaf_copy_items_entirely(dest_bi, src, FIRST_TO_LAST,
+						 pos, cpy_num - 1);
+
+			/* copy part of the item which number is cpy_num+pos-1 to the end of the DEST */
+			leaf_item_bottle(dest_bi, src, FIRST_TO_LAST,
+					 cpy_num + pos - 1, cpy_bytes);
+		}
+	} else {
+		/* copy items to right */
+		src_nr_item = B_NR_ITEMS(src);
+		if (cpy_num == 1)
+			bytes = cpy_bytes;
+		else
+			bytes = -1;
+
+		/* copy the last item or it part or nothing to the begin of the DEST (i = leaf_copy_boundary_item(DEST,SOURCE,1,bytes)); */
+		i = leaf_copy_boundary_item(dest_bi, src, LAST_TO_FIRST, bytes);
+
+		cpy_num -= i;
+		if (cpy_num == 0)
+			return i;
+
+		pos = src_nr_item - cpy_num - i;
+		if (cpy_bytes == -1) {
+			/* starting from position 'pos' copy last cpy_num items of SOURCE to begin of DEST */
+			leaf_copy_items_entirely(dest_bi, src, LAST_TO_FIRST,
+						 pos, cpy_num);
+		} else {
+			/* copy last cpy_num-1 items starting from position 'pos+1' of the SOURCE to the begin of the DEST; */
+			leaf_copy_items_entirely(dest_bi, src, LAST_TO_FIRST,
+						 pos + 1, cpy_num - 1);
+
+			/* copy part of the item which number is pos to the begin of the DEST */
+			leaf_item_bottle(dest_bi, src, LAST_TO_FIRST, pos,
+					 cpy_bytes);
+		}
+	}
+	return i;
+}
+
+/* there are types of coping: from S[0] to L[0], from S[0] to R[0],
+   from R[0] to L[0]. for each of these we have to define parent and
+   positions of destination and source buffers */
+static void leaf_define_dest_src_infos(int shift_mode, struct tree_balance *tb,
+				       struct buffer_info *dest_bi,
+				       struct buffer_info *src_bi,
+				       int *first_last,
+				       struct buffer_head *Snew)
+{
+	memset(dest_bi, 0, sizeof(struct buffer_info));
+	memset(src_bi, 0, sizeof(struct buffer_info));
+
+	/* define dest, src, dest parent, dest position */
+	switch (shift_mode) {
+	case LEAF_FROM_S_TO_L:	/* it is used in leaf_shift_left */
+		src_bi->tb = tb;
+		src_bi->bi_bh = PATH_PLAST_BUFFER(tb->tb_path);
+		src_bi->bi_parent = PATH_H_PPARENT(tb->tb_path, 0);
+		src_bi->bi_position = PATH_H_B_ITEM_ORDER(tb->tb_path, 0);	/* src->b_item_order */
+		dest_bi->tb = tb;
+		dest_bi->bi_bh = tb->L[0];
+		dest_bi->bi_parent = tb->FL[0];
+		dest_bi->bi_position = get_left_neighbor_position(tb, 0);
+		*first_last = FIRST_TO_LAST;
+		break;
+
+	case LEAF_FROM_S_TO_R:	/* it is used in leaf_shift_right */
+		src_bi->tb = tb;
+		src_bi->bi_bh = PATH_PLAST_BUFFER(tb->tb_path);
+		src_bi->bi_parent = PATH_H_PPARENT(tb->tb_path, 0);
+		src_bi->bi_position = PATH_H_B_ITEM_ORDER(tb->tb_path, 0);
+		dest_bi->tb = tb;
+		dest_bi->bi_bh = tb->R[0];
+		dest_bi->bi_parent = tb->FR[0];
+		dest_bi->bi_position = get_right_neighbor_position(tb, 0);
+		*first_last = LAST_TO_FIRST;
+		break;
+
+	case LEAF_FROM_R_TO_L:	/* it is used in balance_leaf_when_delete */
+		src_bi->tb = tb;
+		src_bi->bi_bh = tb->R[0];
+		src_bi->bi_parent = tb->FR[0];
+		src_bi->bi_position = get_right_neighbor_position(tb, 0);
+		dest_bi->tb = tb;
+		dest_bi->bi_bh = tb->L[0];
+		dest_bi->bi_parent = tb->FL[0];
+		dest_bi->bi_position = get_left_neighbor_position(tb, 0);
+		*first_last = FIRST_TO_LAST;
+		break;
+
+	case LEAF_FROM_L_TO_R:	/* it is used in balance_leaf_when_delete */
+		src_bi->tb = tb;
+		src_bi->bi_bh = tb->L[0];
+		src_bi->bi_parent = tb->FL[0];
+		src_bi->bi_position = get_left_neighbor_position(tb, 0);
+		dest_bi->tb = tb;
+		dest_bi->bi_bh = tb->R[0];
+		dest_bi->bi_parent = tb->FR[0];
+		dest_bi->bi_position = get_right_neighbor_position(tb, 0);
+		*first_last = LAST_TO_FIRST;
+		break;
+
+	case LEAF_FROM_S_TO_SNEW:
+		src_bi->tb = tb;
+		src_bi->bi_bh = PATH_PLAST_BUFFER(tb->tb_path);
+		src_bi->bi_parent = PATH_H_PPARENT(tb->tb_path, 0);
+		src_bi->bi_position = PATH_H_B_ITEM_ORDER(tb->tb_path, 0);
+		dest_bi->tb = tb;
+		dest_bi->bi_bh = Snew;
+		dest_bi->bi_parent = NULL;
+		dest_bi->bi_position = 0;
+		*first_last = LAST_TO_FIRST;
+		break;
+
+	default:
+		reiserfs_panic(NULL,
+			       "vs-10250: leaf_define_dest_src_infos: shift type is unknown (%d)",
+			       shift_mode);
+	}
+	RFALSE(!src_bi->bi_bh || !dest_bi->bi_bh,
+	       "vs-10260: mode==%d, source (%p) or dest (%p) buffer is initialized incorrectly",
+	       shift_mode, src_bi->bi_bh, dest_bi->bi_bh);
+}
+
+/* copy mov_num items and mov_bytes of the (mov_num-1)th item to
+   neighbor. Delete them from source */
+int leaf_move_items(int shift_mode, struct tree_balance *tb, int mov_num,
+		    int mov_bytes, struct buffer_head *Snew)
+{
+	int ret_value;
+	struct buffer_info dest_bi, src_bi;
+	int first_last;
+
+	leaf_define_dest_src_infos(shift_mode, tb, &dest_bi, &src_bi,
+				   &first_last, Snew);
+
+	ret_value =
+	    leaf_copy_items(&dest_bi, src_bi.bi_bh, first_last, mov_num,
+			    mov_bytes);
+
+	leaf_delete_items(&src_bi, first_last,
+			  (first_last ==
+			   FIRST_TO_LAST) ? 0 : (B_NR_ITEMS(src_bi.bi_bh) -
+						 mov_num), mov_num, mov_bytes);
+
+	return ret_value;
+}
+
+/* Shift shift_num items (and shift_bytes of last shifted item if shift_bytes != -1)
+   from S[0] to L[0] and replace the delimiting key */
+int leaf_shift_left(struct tree_balance *tb, int shift_num, int shift_bytes)
+{
+	struct buffer_head *S0 = PATH_PLAST_BUFFER(tb->tb_path);
+	int i;
+
+	/* move shift_num (and shift_bytes bytes) items from S[0] to left neighbor L[0] */
+	i = leaf_move_items(LEAF_FROM_S_TO_L, tb, shift_num, shift_bytes, NULL);
+
+	if (shift_num) {
+		if (B_NR_ITEMS(S0) == 0) {	/* number of items in S[0] == 0 */
+
+			RFALSE(shift_bytes != -1,
+			       "vs-10270: S0 is empty now, but shift_bytes != -1 (%d)",
+			       shift_bytes);
+#ifdef CONFIG_REISERFS_CHECK
+			if (tb->tb_mode == M_PASTE || tb->tb_mode == M_INSERT) {
+				print_cur_tb("vs-10275");
+				reiserfs_panic(tb->tb_sb,
+					       "vs-10275: leaf_shift_left: balance condition corrupted (%c)",
+					       tb->tb_mode);
+			}
+#endif
+
+			if (PATH_H_POSITION(tb->tb_path, 1) == 0)
+				replace_key(tb, tb->CFL[0], tb->lkey[0],
+					    PATH_H_PPARENT(tb->tb_path, 0), 0);
+
+		} else {
+			/* replace lkey in CFL[0] by 0-th key from S[0]; */
+			replace_key(tb, tb->CFL[0], tb->lkey[0], S0, 0);
+
+			RFALSE((shift_bytes != -1 &&
+				!(is_direntry_le_ih(B_N_PITEM_HEAD(S0, 0))
+				  && !I_ENTRY_COUNT(B_N_PITEM_HEAD(S0, 0)))) &&
+			       (!op_is_left_mergeable
+				(B_N_PKEY(S0, 0), S0->b_size)),
+			       "vs-10280: item must be mergeable");
+		}
+	}
+
+	return i;
+}
+
+/* CLEANING STOPPED HERE */
+
+/* Shift shift_num (shift_bytes) items from S[0] to the right neighbor, and replace the delimiting key */
+int leaf_shift_right(struct tree_balance *tb, int shift_num, int shift_bytes)
+{
+	//  struct buffer_head * S0 = PATH_PLAST_BUFFER (tb->tb_path);
+	int ret_value;
+
+	/* move shift_num (and shift_bytes) items from S[0] to right neighbor R[0] */
+	ret_value =
+	    leaf_move_items(LEAF_FROM_S_TO_R, tb, shift_num, shift_bytes, NULL);
+
+	/* replace rkey in CFR[0] by the 0-th key from R[0] */
+	if (shift_num) {
+		replace_key(tb, tb->CFR[0], tb->rkey[0], tb->R[0], 0);
+
+	}
+
+	return ret_value;
+}
+
+static void leaf_delete_items_entirely(struct buffer_info *bi,
+				       int first, int del_num);
+/*  If del_bytes == -1, starting from position 'first' delete del_num items in whole in buffer CUR.
+    If not. 
+    If last_first == 0. Starting from position 'first' delete del_num-1 items in whole. Delete part of body of
+    the first item. Part defined by del_bytes. Don't delete first item header
+    If last_first == 1. Starting from position 'first+1' delete del_num-1 items in whole. Delete part of body of
+    the last item . Part defined by del_bytes. Don't delete last item header.
+*/
+void leaf_delete_items(struct buffer_info *cur_bi, int last_first,
+		       int first, int del_num, int del_bytes)
+{
+	struct buffer_head *bh;
+	int item_amount = B_NR_ITEMS(bh = cur_bi->bi_bh);
+
+	RFALSE(!bh, "10155: bh is not defined");
+	RFALSE(del_num < 0, "10160: del_num can not be < 0. del_num==%d",
+	       del_num);
+	RFALSE(first < 0
+	       || first + del_num > item_amount,
+	       "10165: invalid number of first item to be deleted (%d) or "
+	       "no so much items (%d) to delete (only %d)", first,
+	       first + del_num, item_amount);
+
+	if (del_num == 0)
+		return;
+
+	if (first == 0 && del_num == item_amount && del_bytes == -1) {
+		make_empty_node(cur_bi);
+		do_balance_mark_leaf_dirty(cur_bi->tb, bh, 0);
+		return;
+	}
+
+	if (del_bytes == -1)
+		/* delete del_num items beginning from item in position first */
+		leaf_delete_items_entirely(cur_bi, first, del_num);
+	else {
+		if (last_first == FIRST_TO_LAST) {
+			/* delete del_num-1 items beginning from item in position first  */
+			leaf_delete_items_entirely(cur_bi, first, del_num - 1);
+
+			/* delete the part of the first item of the bh
+			   do not delete item header
+			 */
+			leaf_cut_from_buffer(cur_bi, 0, 0, del_bytes);
+		} else {
+			struct item_head *ih;
+			int len;
+
+			/* delete del_num-1 items beginning from item in position first+1  */
+			leaf_delete_items_entirely(cur_bi, first + 1,
+						   del_num - 1);
+
+			if (is_direntry_le_ih
+			    (ih = B_N_PITEM_HEAD(bh, B_NR_ITEMS(bh) - 1)))
+				/* the last item is directory  */
+				/* len = numbers of directory entries in this item */
+				len = ih_entry_count(ih);
+			else
+				/* len = body len of item */
+				len = ih_item_len(ih);
+
+			/* delete the part of the last item of the bh 
+			   do not delete item header
+			 */
+			leaf_cut_from_buffer(cur_bi, B_NR_ITEMS(bh) - 1,
+					     len - del_bytes, del_bytes);
+		}
+	}
+}
+
+/* insert item into the leaf node in position before */
+void leaf_insert_into_buf(struct buffer_info *bi, int before,
+			  struct item_head *inserted_item_ih,
+			  const char *inserted_item_body, int zeros_number)
+{
+	struct buffer_head *bh = bi->bi_bh;
+	int nr, free_space;
+	struct block_head *blkh;
+	struct item_head *ih;
+	int i;
+	int last_loc, unmoved_loc;
+	char *to;
+
+	blkh = B_BLK_HEAD(bh);
+	nr = blkh_nr_item(blkh);
+	free_space = blkh_free_space(blkh);
+
+	/* check free space */
+	RFALSE(free_space < ih_item_len(inserted_item_ih) + IH_SIZE,
+	       "vs-10170: not enough free space in block %z, new item %h",
+	       bh, inserted_item_ih);
+	RFALSE(zeros_number > ih_item_len(inserted_item_ih),
+	       "vs-10172: zero number == %d, item length == %d",
+	       zeros_number, ih_item_len(inserted_item_ih));
+
+	/* get item new item must be inserted before */
+	ih = B_N_PITEM_HEAD(bh, before);
+
+	/* prepare space for the body of new item */
+	last_loc = nr ? ih_location(&(ih[nr - before - 1])) : bh->b_size;
+	unmoved_loc = before ? ih_location(ih - 1) : bh->b_size;
+
+	memmove(bh->b_data + last_loc - ih_item_len(inserted_item_ih),
+		bh->b_data + last_loc, unmoved_loc - last_loc);
+
+	to = bh->b_data + unmoved_loc - ih_item_len(inserted_item_ih);
+	memset(to, 0, zeros_number);
+	to += zeros_number;
+
+	/* copy body to prepared space */
+	if (inserted_item_body)
+		memmove(to, inserted_item_body,
+			ih_item_len(inserted_item_ih) - zeros_number);
+	else
+		memset(to, '\0', ih_item_len(inserted_item_ih) - zeros_number);
+
+	/* insert item header */
+	memmove(ih + 1, ih, IH_SIZE * (nr - before));
+	memmove(ih, inserted_item_ih, IH_SIZE);
+
+	/* change locations */
+	for (i = before; i < nr + 1; i++) {
+		unmoved_loc -= ih_item_len(&(ih[i - before]));
+		put_ih_location(&(ih[i - before]), unmoved_loc);
+	}
+
+	/* sizes, free space, item number */
+	set_blkh_nr_item(blkh, blkh_nr_item(blkh) + 1);
+	set_blkh_free_space(blkh,
+			    free_space - (IH_SIZE +
+					  ih_item_len(inserted_item_ih)));
+	do_balance_mark_leaf_dirty(bi->tb, bh, 1);
+
+	if (bi->bi_parent) {
+		struct disk_child *t_dc;
+		t_dc = B_N_CHILD(bi->bi_parent, bi->bi_position);
+		put_dc_size(t_dc,
+			    dc_size(t_dc) + (IH_SIZE +
+					     ih_item_len(inserted_item_ih)));
+		do_balance_mark_internal_dirty(bi->tb, bi->bi_parent, 0);
+	}
+}
+
+/* paste paste_size bytes to affected_item_num-th item. 
+   When item is a directory, this only prepare space for new entries */
+void leaf_paste_in_buffer(struct buffer_info *bi, int affected_item_num,
+			  int pos_in_item, int paste_size,
+			  const char *body, int zeros_number)
+{
+	struct buffer_head *bh = bi->bi_bh;
+	int nr, free_space;
+	struct block_head *blkh;
+	struct item_head *ih;
+	int i;
+	int last_loc, unmoved_loc;
+
+	blkh = B_BLK_HEAD(bh);
+	nr = blkh_nr_item(blkh);
+	free_space = blkh_free_space(blkh);
+
+	/* check free space */
+	RFALSE(free_space < paste_size,
+	       "vs-10175: not enough free space: needed %d, available %d",
+	       paste_size, free_space);
+
+#ifdef CONFIG_REISERFS_CHECK
+	if (zeros_number > paste_size) {
+		print_cur_tb("10177");
+		reiserfs_panic(NULL,
+			       "vs-10177: leaf_paste_in_buffer: ero number == %d, paste_size == %d",
+			       zeros_number, paste_size);
+	}
+#endif				/* CONFIG_REISERFS_CHECK */
+
+	/* item to be appended */
+	ih = B_N_PITEM_HEAD(bh, affected_item_num);
+
+	last_loc = ih_location(&(ih[nr - affected_item_num - 1]));
+	unmoved_loc = affected_item_num ? ih_location(ih - 1) : bh->b_size;
+
+	/* prepare space */
+	memmove(bh->b_data + last_loc - paste_size, bh->b_data + last_loc,
+		unmoved_loc - last_loc);
+
+	/* change locations */
+	for (i = affected_item_num; i < nr; i++)
+		put_ih_location(&(ih[i - affected_item_num]),
+				ih_location(&(ih[i - affected_item_num])) -
+				paste_size);
+
+	if (body) {
+		if (!is_direntry_le_ih(ih)) {
+			if (!pos_in_item) {
+				/* shift data to right */
+				memmove(bh->b_data + ih_location(ih) +
+					paste_size,
+					bh->b_data + ih_location(ih),
+					ih_item_len(ih));
+				/* paste data in the head of item */
+				memset(bh->b_data + ih_location(ih), 0,
+				       zeros_number);
+				memcpy(bh->b_data + ih_location(ih) +
+				       zeros_number, body,
+				       paste_size - zeros_number);
+			} else {
+				memset(bh->b_data + unmoved_loc - paste_size, 0,
+				       zeros_number);
+				memcpy(bh->b_data + unmoved_loc - paste_size +
+				       zeros_number, body,
+				       paste_size - zeros_number);
+			}
+		}
+	} else
+		memset(bh->b_data + unmoved_loc - paste_size, '\0', paste_size);
+
+	put_ih_item_len(ih, ih_item_len(ih) + paste_size);
+
+	/* change free space */
+	set_blkh_free_space(blkh, free_space - paste_size);
+
+	do_balance_mark_leaf_dirty(bi->tb, bh, 0);
+
+	if (bi->bi_parent) {
+		struct disk_child *t_dc =
+		    B_N_CHILD(bi->bi_parent, bi->bi_position);
+		put_dc_size(t_dc, dc_size(t_dc) + paste_size);
+		do_balance_mark_internal_dirty(bi->tb, bi->bi_parent, 0);
+	}
+}
+
+/* cuts DEL_COUNT entries beginning from FROM-th entry. Directory item
+   does not have free space, so it moves DEHs and remaining records as
+   necessary. Return value is size of removed part of directory item
+   in bytes. */
+static int leaf_cut_entries(struct buffer_head *bh,
+			    struct item_head *ih, int from, int del_count)
+{
+	char *item;
+	struct reiserfs_de_head *deh;
+	int prev_record_offset;	/* offset of record, that is (from-1)th */
+	char *prev_record;	/* */
+	int cut_records_len;	/* length of all removed records */
+	int i;
+
+	/* make sure, that item is directory and there are enough entries to
+	   remove */
+	RFALSE(!is_direntry_le_ih(ih), "10180: item is not directory item");
+	RFALSE(I_ENTRY_COUNT(ih) < from + del_count,
+	       "10185: item contains not enough entries: entry_cout = %d, from = %d, to delete = %d",
+	       I_ENTRY_COUNT(ih), from, del_count);
+
+	if (del_count == 0)
+		return 0;
+
+	/* first byte of item */
+	item = bh->b_data + ih_location(ih);
+
+	/* entry head array */
+	deh = B_I_DEH(bh, ih);
+
+	/* first byte of remaining entries, those are BEFORE cut entries
+	   (prev_record) and length of all removed records (cut_records_len) */
+	prev_record_offset =
+	    (from ? deh_location(&(deh[from - 1])) : ih_item_len(ih));
+	cut_records_len = prev_record_offset /*from_record */  -
+	    deh_location(&(deh[from + del_count - 1]));
+	prev_record = item + prev_record_offset;
+
+	/* adjust locations of remaining entries */
+	for (i = I_ENTRY_COUNT(ih) - 1; i > from + del_count - 1; i--)
+		put_deh_location(&(deh[i]),
+				 deh_location(&deh[i]) -
+				 (DEH_SIZE * del_count));
+
+	for (i = 0; i < from; i++)
+		put_deh_location(&(deh[i]),
+				 deh_location(&deh[i]) - (DEH_SIZE * del_count +
+							  cut_records_len));
+
+	put_ih_entry_count(ih, ih_entry_count(ih) - del_count);
+
+	/* shift entry head array and entries those are AFTER removed entries */
+	memmove((char *)(deh + from),
+		deh + from + del_count,
+		prev_record - cut_records_len - (char *)(deh + from +
+							 del_count));
+
+	/* shift records, those are BEFORE removed entries */
+	memmove(prev_record - cut_records_len - DEH_SIZE * del_count,
+		prev_record, item + ih_item_len(ih) - prev_record);
+
+	return DEH_SIZE * del_count + cut_records_len;
+}
+
+/*  when cut item is part of regular file
+        pos_in_item - first byte that must be cut
+        cut_size - number of bytes to be cut beginning from pos_in_item
+ 
+   when cut item is part of directory
+        pos_in_item - number of first deleted entry
+        cut_size - count of deleted entries
+    */
+void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num,
+			  int pos_in_item, int cut_size)
+{
+	int nr;
+	struct buffer_head *bh = bi->bi_bh;
+	struct block_head *blkh;
+	struct item_head *ih;
+	int last_loc, unmoved_loc;
+	int i;
+
+	blkh = B_BLK_HEAD(bh);
+	nr = blkh_nr_item(blkh);
+
+	/* item head of truncated item */
+	ih = B_N_PITEM_HEAD(bh, cut_item_num);
+
+	if (is_direntry_le_ih(ih)) {
+		/* first cut entry () */
+		cut_size = leaf_cut_entries(bh, ih, pos_in_item, cut_size);
+		if (pos_in_item == 0) {
+			/* change key */
+			RFALSE(cut_item_num,
+			       "when 0-th enrty of item is cut, that item must be first in the node, not %d-th",
+			       cut_item_num);
+			/* change item key by key of first entry in the item */
+			set_le_ih_k_offset(ih, deh_offset(B_I_DEH(bh, ih)));
+			/*memcpy (&ih->ih_key.k_offset, &(B_I_DEH (bh, ih)->deh_offset), SHORT_KEY_SIZE); */
+		}
+	} else {
+		/* item is direct or indirect */
+		RFALSE(is_statdata_le_ih(ih), "10195: item is stat data");
+		RFALSE(pos_in_item && pos_in_item + cut_size != ih_item_len(ih),
+		       "10200: invalid offset (%lu) or trunc_size (%lu) or ih_item_len (%lu)",
+		       (long unsigned)pos_in_item, (long unsigned)cut_size,
+		       (long unsigned)ih_item_len(ih));
+
+		/* shift item body to left if cut is from the head of item */
+		if (pos_in_item == 0) {
+			memmove(bh->b_data + ih_location(ih),
+				bh->b_data + ih_location(ih) + cut_size,
+				ih_item_len(ih) - cut_size);
+
+			/* change key of item */
+			if (is_direct_le_ih(ih))
+				set_le_ih_k_offset(ih,
+						   le_ih_k_offset(ih) +
+						   cut_size);
+			else {
+				set_le_ih_k_offset(ih,
+						   le_ih_k_offset(ih) +
+						   (cut_size / UNFM_P_SIZE) *
+						   bh->b_size);
+				RFALSE(ih_item_len(ih) == cut_size
+				       && get_ih_free_space(ih),
+				       "10205: invalid ih_free_space (%h)", ih);
+			}
+		}
+	}
+
+	/* location of the last item */
+	last_loc = ih_location(&(ih[nr - cut_item_num - 1]));
+
+	/* location of the item, which is remaining at the same place */
+	unmoved_loc = cut_item_num ? ih_location(ih - 1) : bh->b_size;
+
+	/* shift */
+	memmove(bh->b_data + last_loc + cut_size, bh->b_data + last_loc,
+		unmoved_loc - last_loc - cut_size);
+
+	/* change item length */
+	put_ih_item_len(ih, ih_item_len(ih) - cut_size);
+
+	if (is_indirect_le_ih(ih)) {
+		if (pos_in_item)
+			set_ih_free_space(ih, 0);
+	}
+
+	/* change locations */
+	for (i = cut_item_num; i < nr; i++)
+		put_ih_location(&(ih[i - cut_item_num]),
+				ih_location(&ih[i - cut_item_num]) + cut_size);
+
+	/* size, free space */
+	set_blkh_free_space(blkh, blkh_free_space(blkh) + cut_size);
+
+	do_balance_mark_leaf_dirty(bi->tb, bh, 0);
+
+	if (bi->bi_parent) {
+		struct disk_child *t_dc;
+		t_dc = B_N_CHILD(bi->bi_parent, bi->bi_position);
+		put_dc_size(t_dc, dc_size(t_dc) - cut_size);
+		do_balance_mark_internal_dirty(bi->tb, bi->bi_parent, 0);
+	}
+}
+
+/* delete del_num items from buffer starting from the first'th item */
+static void leaf_delete_items_entirely(struct buffer_info *bi,
+				       int first, int del_num)
+{
+	struct buffer_head *bh = bi->bi_bh;
+	int nr;
+	int i, j;
+	int last_loc, last_removed_loc;
+	struct block_head *blkh;
+	struct item_head *ih;
+
+	RFALSE(bh == NULL, "10210: buffer is 0");
+	RFALSE(del_num < 0, "10215: del_num less than 0 (%d)", del_num);
+
+	if (del_num == 0)
+		return;
+
+	blkh = B_BLK_HEAD(bh);
+	nr = blkh_nr_item(blkh);
+
+	RFALSE(first < 0 || first + del_num > nr,
+	       "10220: first=%d, number=%d, there is %d items", first, del_num,
+	       nr);
+
+	if (first == 0 && del_num == nr) {
+		/* this does not work */
+		make_empty_node(bi);
+
+		do_balance_mark_leaf_dirty(bi->tb, bh, 0);
+		return;
+	}
+
+	ih = B_N_PITEM_HEAD(bh, first);
+
+	/* location of unmovable item */
+	j = (first == 0) ? bh->b_size : ih_location(ih - 1);
+
+	/* delete items */
+	last_loc = ih_location(&(ih[nr - 1 - first]));
+	last_removed_loc = ih_location(&(ih[del_num - 1]));
+
+	memmove(bh->b_data + last_loc + j - last_removed_loc,
+		bh->b_data + last_loc, last_removed_loc - last_loc);
+
+	/* delete item headers */
+	memmove(ih, ih + del_num, (nr - first - del_num) * IH_SIZE);
+
+	/* change item location */
+	for (i = first; i < nr - del_num; i++)
+		put_ih_location(&(ih[i - first]),
+				ih_location(&(ih[i - first])) + (j -
+								 last_removed_loc));
+
+	/* sizes, item number */
+	set_blkh_nr_item(blkh, blkh_nr_item(blkh) - del_num);
+	set_blkh_free_space(blkh,
+			    blkh_free_space(blkh) + (j - last_removed_loc +
+						     IH_SIZE * del_num));
+
+	do_balance_mark_leaf_dirty(bi->tb, bh, 0);
+
+	if (bi->bi_parent) {
+		struct disk_child *t_dc =
+		    B_N_CHILD(bi->bi_parent, bi->bi_position);
+		put_dc_size(t_dc,
+			    dc_size(t_dc) - (j - last_removed_loc +
+					     IH_SIZE * del_num));
+		do_balance_mark_internal_dirty(bi->tb, bi->bi_parent, 0);
+	}
+}
+
+/* paste new_entry_count entries (new_dehs, records) into position before to item_num-th item */
+void leaf_paste_entries(struct buffer_head *bh,
+			int item_num,
+			int before,
+			int new_entry_count,
+			struct reiserfs_de_head *new_dehs,
+			const char *records, int paste_size)
+{
+	struct item_head *ih;
+	char *item;
+	struct reiserfs_de_head *deh;
+	char *insert_point;
+	int i, old_entry_num;
+
+	if (new_entry_count == 0)
+		return;
+
+	ih = B_N_PITEM_HEAD(bh, item_num);
+
+	/* make sure, that item is directory, and there are enough records in it */
+	RFALSE(!is_direntry_le_ih(ih), "10225: item is not directory item");
+	RFALSE(I_ENTRY_COUNT(ih) < before,
+	       "10230: there are no entry we paste entries before. entry_count = %d, before = %d",
+	       I_ENTRY_COUNT(ih), before);
+
+	/* first byte of dest item */
+	item = bh->b_data + ih_location(ih);
+
+	/* entry head array */
+	deh = B_I_DEH(bh, ih);
+
+	/* new records will be pasted at this point */
+	insert_point =
+	    item +
+	    (before ? deh_location(&(deh[before - 1]))
+	     : (ih_item_len(ih) - paste_size));
+
+	/* adjust locations of records that will be AFTER new records */
+	for (i = I_ENTRY_COUNT(ih) - 1; i >= before; i--)
+		put_deh_location(&(deh[i]),
+				 deh_location(&(deh[i])) +
+				 (DEH_SIZE * new_entry_count));
+
+	/* adjust locations of records that will be BEFORE new records */
+	for (i = 0; i < before; i++)
+		put_deh_location(&(deh[i]),
+				 deh_location(&(deh[i])) + paste_size);
+
+	old_entry_num = I_ENTRY_COUNT(ih);
+	put_ih_entry_count(ih, ih_entry_count(ih) + new_entry_count);
+
+	/* prepare space for pasted records */
+	memmove(insert_point + paste_size, insert_point,
+		item + (ih_item_len(ih) - paste_size) - insert_point);
+
+	/* copy new records */
+	memcpy(insert_point + DEH_SIZE * new_entry_count, records,
+	       paste_size - DEH_SIZE * new_entry_count);
+
+	/* prepare space for new entry heads */
+	deh += before;
+	memmove((char *)(deh + new_entry_count), deh,
+		insert_point - (char *)deh);
+
+	/* copy new entry heads */
+	deh = (struct reiserfs_de_head *)((char *)deh);
+	memcpy(deh, new_dehs, DEH_SIZE * new_entry_count);
+
+	/* set locations of new records */
+	for (i = 0; i < new_entry_count; i++) {
+		put_deh_location(&(deh[i]),
+				 deh_location(&(deh[i])) +
+				 (-deh_location
+				  (&(new_dehs[new_entry_count - 1])) +
+				  insert_point + DEH_SIZE * new_entry_count -
+				  item));
+	}
+
+	/* change item key if necessary (when we paste before 0-th entry */
+	if (!before) {
+		set_le_ih_k_offset(ih, deh_offset(new_dehs));
+/*      memcpy (&ih->ih_key.k_offset, 
+		       &new_dehs->deh_offset, SHORT_KEY_SIZE);*/
+	}
+#ifdef CONFIG_REISERFS_CHECK
+	{
+		int prev, next;
+		/* check record locations */
+		deh = B_I_DEH(bh, ih);
+		for (i = 0; i < I_ENTRY_COUNT(ih); i++) {
+			next =
+			    (i <
+			     I_ENTRY_COUNT(ih) -
+			     1) ? deh_location(&(deh[i + 1])) : 0;
+			prev = (i != 0) ? deh_location(&(deh[i - 1])) : 0;
+
+			if (prev && prev <= deh_location(&(deh[i])))
+				reiserfs_warning(NULL,
+						 "vs-10240: leaf_paste_entries: directory item (%h) corrupted (prev %a, cur(%d) %a)",
+						 ih, deh + i - 1, i, deh + i);
+			if (next && next >= deh_location(&(deh[i])))
+				reiserfs_warning(NULL,
+						 "vs-10250: leaf_paste_entries: directory item (%h) corrupted (cur(%d) %a, next %a)",
+						 ih, i, deh + i, deh + i + 1);
+		}
+	}
+#endif
+
+}
diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c
new file mode 100644
index 0000000..f89ebb9
--- /dev/null
+++ b/fs/reiserfs/namei.c
@@ -0,0 +1,1565 @@
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ *
+ * Trivial changes by Alan Cox to remove EHASHCOLLISION for compatibility
+ *
+ * Trivial Changes:
+ * Rights granted to Hans Reiser to redistribute under other terms providing
+ * he accepts all liability including but not limited to patent, fitness
+ * for purpose, and direct or indirect claims arising from failure to perform.
+ *
+ * NO WARRANTY
+ */
+
+#include <linux/time.h>
+#include <linux/bitops.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/reiserfs_acl.h>
+#include <linux/reiserfs_xattr.h>
+#include <linux/quotaops.h>
+
+#define INC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) { inc_nlink(i); if (i->i_nlink >= REISERFS_LINK_MAX) i->i_nlink=1; }
+#define DEC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) drop_nlink(i);
+
+// directory item contains array of entry headers. This performs
+// binary search through that array
+static int bin_search_in_dir_item(struct reiserfs_dir_entry *de, loff_t off)
+{
+	struct item_head *ih = de->de_ih;
+	struct reiserfs_de_head *deh = de->de_deh;
+	int rbound, lbound, j;
+
+	lbound = 0;
+	rbound = I_ENTRY_COUNT(ih) - 1;
+
+	for (j = (rbound + lbound) / 2; lbound <= rbound;
+	     j = (rbound + lbound) / 2) {
+		if (off < deh_offset(deh + j)) {
+			rbound = j - 1;
+			continue;
+		}
+		if (off > deh_offset(deh + j)) {
+			lbound = j + 1;
+			continue;
+		}
+		// this is not name found, but matched third key component
+		de->de_entry_num = j;
+		return NAME_FOUND;
+	}
+
+	de->de_entry_num = lbound;
+	return NAME_NOT_FOUND;
+}
+
+// comment?  maybe something like set de to point to what the path points to?
+static inline void set_de_item_location(struct reiserfs_dir_entry *de,
+					struct treepath *path)
+{
+	de->de_bh = get_last_bh(path);
+	de->de_ih = get_ih(path);
+	de->de_deh = B_I_DEH(de->de_bh, de->de_ih);
+	de->de_item_num = PATH_LAST_POSITION(path);
+}
+
+// de_bh, de_ih, de_deh (points to first element of array), de_item_num is set
+inline void set_de_name_and_namelen(struct reiserfs_dir_entry *de)
+{
+	struct reiserfs_de_head *deh = de->de_deh + de->de_entry_num;
+
+	BUG_ON(de->de_entry_num >= ih_entry_count(de->de_ih));
+
+	de->de_entrylen = entry_length(de->de_bh, de->de_ih, de->de_entry_num);
+	de->de_namelen = de->de_entrylen - (de_with_sd(deh) ? SD_SIZE : 0);
+	de->de_name = B_I_PITEM(de->de_bh, de->de_ih) + deh_location(deh);
+	if (de->de_name[de->de_namelen - 1] == 0)
+		de->de_namelen = strlen(de->de_name);
+}
+
+// what entry points to
+static inline void set_de_object_key(struct reiserfs_dir_entry *de)
+{
+	BUG_ON(de->de_entry_num >= ih_entry_count(de->de_ih));
+	de->de_dir_id = deh_dir_id(&(de->de_deh[de->de_entry_num]));
+	de->de_objectid = deh_objectid(&(de->de_deh[de->de_entry_num]));
+}
+
+static inline void store_de_entry_key(struct reiserfs_dir_entry *de)
+{
+	struct reiserfs_de_head *deh = de->de_deh + de->de_entry_num;
+
+	BUG_ON(de->de_entry_num >= ih_entry_count(de->de_ih));
+
+	/* store key of the found entry */
+	de->de_entry_key.version = KEY_FORMAT_3_5;
+	de->de_entry_key.on_disk_key.k_dir_id =
+	    le32_to_cpu(de->de_ih->ih_key.k_dir_id);
+	de->de_entry_key.on_disk_key.k_objectid =
+	    le32_to_cpu(de->de_ih->ih_key.k_objectid);
+	set_cpu_key_k_offset(&(de->de_entry_key), deh_offset(deh));
+	set_cpu_key_k_type(&(de->de_entry_key), TYPE_DIRENTRY);
+}
+
+/* We assign a key to each directory item, and place multiple entries
+in a single directory item.  A directory item has a key equal to the
+key of the first directory entry in it.
+
+This function first calls search_by_key, then, if item whose first
+entry matches is not found it looks for the entry inside directory
+item found by search_by_key. Fills the path to the entry, and to the
+entry position in the item 
+
+*/
+
+/* The function is NOT SCHEDULE-SAFE! */
+int search_by_entry_key(struct super_block *sb, const struct cpu_key *key,
+			struct treepath *path, struct reiserfs_dir_entry *de)
+{
+	int retval;
+
+	retval = search_item(sb, key, path);
+	switch (retval) {
+	case ITEM_NOT_FOUND:
+		if (!PATH_LAST_POSITION(path)) {
+			reiserfs_warning(sb,
+					 "vs-7000: search_by_entry_key: search_by_key returned item position == 0");
+			pathrelse(path);
+			return IO_ERROR;
+		}
+		PATH_LAST_POSITION(path)--;
+
+	case ITEM_FOUND:
+		break;
+
+	case IO_ERROR:
+		return retval;
+
+	default:
+		pathrelse(path);
+		reiserfs_warning(sb,
+				 "vs-7002: search_by_entry_key: no path to here");
+		return IO_ERROR;
+	}
+
+	set_de_item_location(de, path);
+
+#ifdef CONFIG_REISERFS_CHECK
+	if (!is_direntry_le_ih(de->de_ih) ||
+	    COMP_SHORT_KEYS(&(de->de_ih->ih_key), key)) {
+		print_block(de->de_bh, 0, -1, -1);
+		reiserfs_panic(sb,
+			       "vs-7005: search_by_entry_key: found item %h is not directory item or "
+			       "does not belong to the same directory as key %K",
+			       de->de_ih, key);
+	}
+#endif				/* CONFIG_REISERFS_CHECK */
+
+	/* binary search in directory item by third componen t of the
+	   key. sets de->de_entry_num of de */
+	retval = bin_search_in_dir_item(de, cpu_key_k_offset(key));
+	path->pos_in_item = de->de_entry_num;
+	if (retval != NAME_NOT_FOUND) {
+		// ugly, but rename needs de_bh, de_deh, de_name, de_namelen, de_objectid set
+		set_de_name_and_namelen(de);
+		set_de_object_key(de);
+	}
+	return retval;
+}
+
+/* Keyed 32-bit hash function using TEA in a Davis-Meyer function */
+
+/* The third component is hashed, and you can choose from more than
+   one hash function.  Per directory hashes are not yet implemented
+   but are thought about. This function should be moved to hashes.c
+   Jedi, please do so.  -Hans */
+
+static __u32 get_third_component(struct super_block *s,
+				 const char *name, int len)
+{
+	__u32 res;
+
+	if (!len || (len == 1 && name[0] == '.'))
+		return DOT_OFFSET;
+	if (len == 2 && name[0] == '.' && name[1] == '.')
+		return DOT_DOT_OFFSET;
+
+	res = REISERFS_SB(s)->s_hash_function(name, len);
+
+	// take bits from 7-th to 30-th including both bounds
+	res = GET_HASH_VALUE(res);
+	if (res == 0)
+		// needed to have no names before "." and ".." those have hash
+		// value == 0 and generation conters 1 and 2 accordingly
+		res = 128;
+	return res + MAX_GENERATION_NUMBER;
+}
+
+static int reiserfs_match(struct reiserfs_dir_entry *de,
+			  const char *name, int namelen)
+{
+	int retval = NAME_NOT_FOUND;
+
+	if ((namelen == de->de_namelen) &&
+	    !memcmp(de->de_name, name, de->de_namelen))
+		retval =
+		    (de_visible(de->de_deh + de->de_entry_num) ? NAME_FOUND :
+		     NAME_FOUND_INVISIBLE);
+
+	return retval;
+}
+
+/* de's de_bh, de_ih, de_deh, de_item_num, de_entry_num are set already */
+
+				/* used when hash collisions exist */
+
+static int linear_search_in_dir_item(struct cpu_key *key,
+				     struct reiserfs_dir_entry *de,
+				     const char *name, int namelen)
+{
+	struct reiserfs_de_head *deh = de->de_deh;
+	int retval;
+	int i;
+
+	i = de->de_entry_num;
+
+	if (i == I_ENTRY_COUNT(de->de_ih) ||
+	    GET_HASH_VALUE(deh_offset(deh + i)) !=
+	    GET_HASH_VALUE(cpu_key_k_offset(key))) {
+		i--;
+	}
+
+	RFALSE(de->de_deh != B_I_DEH(de->de_bh, de->de_ih),
+	       "vs-7010: array of entry headers not found");
+
+	deh += i;
+
+	for (; i >= 0; i--, deh--) {
+		if (GET_HASH_VALUE(deh_offset(deh)) !=
+		    GET_HASH_VALUE(cpu_key_k_offset(key))) {
+			// hash value does not match, no need to check whole name
+			return NAME_NOT_FOUND;
+		}
+
+		/* mark, that this generation number is used */
+		if (de->de_gen_number_bit_string)
+			set_bit(GET_GENERATION_NUMBER(deh_offset(deh)),
+				de->de_gen_number_bit_string);
+
+		// calculate pointer to name and namelen
+		de->de_entry_num = i;
+		set_de_name_and_namelen(de);
+
+		if ((retval =
+		     reiserfs_match(de, name, namelen)) != NAME_NOT_FOUND) {
+			// de's de_name, de_namelen, de_recordlen are set. Fill the rest:
+
+			// key of pointed object
+			set_de_object_key(de);
+
+			store_de_entry_key(de);
+
+			// retval can be NAME_FOUND or NAME_FOUND_INVISIBLE
+			return retval;
+		}
+	}
+
+	if (GET_GENERATION_NUMBER(le_ih_k_offset(de->de_ih)) == 0)
+		/* we have reached left most entry in the node. In common we
+		   have to go to the left neighbor, but if generation counter
+		   is 0 already, we know for sure, that there is no name with
+		   the same hash value */
+		// FIXME: this work correctly only because hash value can not
+		// be 0. Btw, in case of Yura's hash it is probably possible,
+		// so, this is a bug
+		return NAME_NOT_FOUND;
+
+	RFALSE(de->de_item_num,
+	       "vs-7015: two diritems of the same directory in one node?");
+
+	return GOTO_PREVIOUS_ITEM;
+}
+
+// may return NAME_FOUND, NAME_FOUND_INVISIBLE, NAME_NOT_FOUND
+// FIXME: should add something like IOERROR
+static int reiserfs_find_entry(struct inode *dir, const char *name, int namelen,
+			       struct treepath *path_to_entry,
+			       struct reiserfs_dir_entry *de)
+{
+	struct cpu_key key_to_search;
+	int retval;
+
+	if (namelen > REISERFS_MAX_NAME(dir->i_sb->s_blocksize))
+		return NAME_NOT_FOUND;
+
+	/* we will search for this key in the tree */
+	make_cpu_key(&key_to_search, dir,
+		     get_third_component(dir->i_sb, name, namelen),
+		     TYPE_DIRENTRY, 3);
+
+	while (1) {
+		retval =
+		    search_by_entry_key(dir->i_sb, &key_to_search,
+					path_to_entry, de);
+		if (retval == IO_ERROR) {
+			reiserfs_warning(dir->i_sb, "zam-7001: io error in %s",
+					 __func__);
+			return IO_ERROR;
+		}
+
+		/* compare names for all entries having given hash value */
+		retval =
+		    linear_search_in_dir_item(&key_to_search, de, name,
+					      namelen);
+		if (retval != GOTO_PREVIOUS_ITEM) {
+			/* there is no need to scan directory anymore. Given entry found or does not exist */
+			path_to_entry->pos_in_item = de->de_entry_num;
+			return retval;
+		}
+
+		/* there is left neighboring item of this directory and given entry can be there */
+		set_cpu_key_k_offset(&key_to_search,
+				     le_ih_k_offset(de->de_ih) - 1);
+		pathrelse(path_to_entry);
+
+	}			/* while (1) */
+}
+
+static struct dentry *reiserfs_lookup(struct inode *dir, struct dentry *dentry,
+				      struct nameidata *nd)
+{
+	int retval;
+	struct inode *inode = NULL;
+	struct reiserfs_dir_entry de;
+	INITIALIZE_PATH(path_to_entry);
+
+	if (REISERFS_MAX_NAME(dir->i_sb->s_blocksize) < dentry->d_name.len)
+		return ERR_PTR(-ENAMETOOLONG);
+
+	reiserfs_write_lock(dir->i_sb);
+	de.de_gen_number_bit_string = NULL;
+	retval =
+	    reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len,
+				&path_to_entry, &de);
+	pathrelse(&path_to_entry);
+	if (retval == NAME_FOUND) {
+		/* Hide the .reiserfs_priv directory */
+		if (reiserfs_xattrs(dir->i_sb) &&
+		    !old_format_only(dir->i_sb) &&
+		    REISERFS_SB(dir->i_sb)->priv_root &&
+		    REISERFS_SB(dir->i_sb)->priv_root->d_inode &&
+		    de.de_objectid ==
+		    le32_to_cpu(INODE_PKEY
+				(REISERFS_SB(dir->i_sb)->priv_root->d_inode)->
+				k_objectid)) {
+			reiserfs_write_unlock(dir->i_sb);
+			return ERR_PTR(-EACCES);
+		}
+
+		inode =
+		    reiserfs_iget(dir->i_sb, (struct cpu_key *)&(de.de_dir_id));
+		if (!inode || IS_ERR(inode)) {
+			reiserfs_write_unlock(dir->i_sb);
+			return ERR_PTR(-EACCES);
+		}
+
+		/* Propogate the priv_object flag so we know we're in the priv tree */
+		if (is_reiserfs_priv_object(dir))
+			reiserfs_mark_inode_private(inode);
+	}
+	reiserfs_write_unlock(dir->i_sb);
+	if (retval == IO_ERROR) {
+		return ERR_PTR(-EIO);
+	}
+
+	return d_splice_alias(inode, dentry);
+}
+
+/* 
+** looks up the dentry of the parent directory for child.
+** taken from ext2_get_parent
+*/
+struct dentry *reiserfs_get_parent(struct dentry *child)
+{
+	int retval;
+	struct inode *inode = NULL;
+	struct reiserfs_dir_entry de;
+	INITIALIZE_PATH(path_to_entry);
+	struct inode *dir = child->d_inode;
+
+	if (dir->i_nlink == 0) {
+		return ERR_PTR(-ENOENT);
+	}
+	de.de_gen_number_bit_string = NULL;
+
+	reiserfs_write_lock(dir->i_sb);
+	retval = reiserfs_find_entry(dir, "..", 2, &path_to_entry, &de);
+	pathrelse(&path_to_entry);
+	if (retval != NAME_FOUND) {
+		reiserfs_write_unlock(dir->i_sb);
+		return ERR_PTR(-ENOENT);
+	}
+	inode = reiserfs_iget(dir->i_sb, (struct cpu_key *)&(de.de_dir_id));
+	reiserfs_write_unlock(dir->i_sb);
+
+	return d_obtain_alias(inode);
+}
+
+/* add entry to the directory (entry can be hidden). 
+
+insert definition of when hidden directories are used here -Hans
+
+ Does not mark dir   inode dirty, do it after successesfull call to it */
+
+static int reiserfs_add_entry(struct reiserfs_transaction_handle *th,
+			      struct inode *dir, const char *name, int namelen,
+			      struct inode *inode, int visible)
+{
+	struct cpu_key entry_key;
+	struct reiserfs_de_head *deh;
+	INITIALIZE_PATH(path);
+	struct reiserfs_dir_entry de;
+	DECLARE_BITMAP(bit_string, MAX_GENERATION_NUMBER + 1);
+	int gen_number;
+	char small_buf[32 + DEH_SIZE];	/* 48 bytes now and we avoid kmalloc
+					   if we create file with short name */
+	char *buffer;
+	int buflen, paste_size;
+	int retval;
+
+	BUG_ON(!th->t_trans_id);
+
+	/* cannot allow items to be added into a busy deleted directory */
+	if (!namelen)
+		return -EINVAL;
+
+	if (namelen > REISERFS_MAX_NAME(dir->i_sb->s_blocksize))
+		return -ENAMETOOLONG;
+
+	/* each entry has unique key. compose it */
+	make_cpu_key(&entry_key, dir,
+		     get_third_component(dir->i_sb, name, namelen),
+		     TYPE_DIRENTRY, 3);
+
+	/* get memory for composing the entry */
+	buflen = DEH_SIZE + ROUND_UP(namelen);
+	if (buflen > sizeof(small_buf)) {
+		buffer = kmalloc(buflen, GFP_NOFS);
+		if (!buffer)
+			return -ENOMEM;
+	} else
+		buffer = small_buf;
+
+	paste_size =
+	    (get_inode_sd_version(dir) ==
+	     STAT_DATA_V1) ? (DEH_SIZE + namelen) : buflen;
+
+	/* fill buffer : directory entry head, name[, dir objectid | , stat data | ,stat data, dir objectid ] */
+	deh = (struct reiserfs_de_head *)buffer;
+	deh->deh_location = 0;	/* JDM Endian safe if 0 */
+	put_deh_offset(deh, cpu_key_k_offset(&entry_key));
+	deh->deh_state = 0;	/* JDM Endian safe if 0 */
+	/* put key (ino analog) to de */
+	deh->deh_dir_id = INODE_PKEY(inode)->k_dir_id;	/* safe: k_dir_id is le */
+	deh->deh_objectid = INODE_PKEY(inode)->k_objectid;	/* safe: k_objectid is le */
+
+	/* copy name */
+	memcpy((char *)(deh + 1), name, namelen);
+	/* padd by 0s to the 4 byte boundary */
+	padd_item((char *)(deh + 1), ROUND_UP(namelen), namelen);
+
+	/* entry is ready to be pasted into tree, set 'visibility' and 'stat data in entry' attributes */
+	mark_de_without_sd(deh);
+	visible ? mark_de_visible(deh) : mark_de_hidden(deh);
+
+	/* find the proper place for the new entry */
+	memset(bit_string, 0, sizeof(bit_string));
+	de.de_gen_number_bit_string = bit_string;
+	retval = reiserfs_find_entry(dir, name, namelen, &path, &de);
+	if (retval != NAME_NOT_FOUND) {
+		if (buffer != small_buf)
+			kfree(buffer);
+		pathrelse(&path);
+
+		if (retval == IO_ERROR) {
+			return -EIO;
+		}
+
+		if (retval != NAME_FOUND) {
+			reiserfs_warning(dir->i_sb,
+					 "zam-7002:%s: \"reiserfs_find_entry\" "
+					 "has returned unexpected value (%d)",
+					 __func__, retval);
+		}
+
+		return -EEXIST;
+	}
+
+	gen_number =
+	    find_first_zero_bit(bit_string,
+				MAX_GENERATION_NUMBER + 1);
+	if (gen_number > MAX_GENERATION_NUMBER) {
+		/* there is no free generation number */
+		reiserfs_warning(dir->i_sb,
+				 "reiserfs_add_entry: Congratulations! we have got hash function screwed up");
+		if (buffer != small_buf)
+			kfree(buffer);
+		pathrelse(&path);
+		return -EBUSY;
+	}
+	/* adjust offset of directory enrty */
+	put_deh_offset(deh, SET_GENERATION_NUMBER(deh_offset(deh), gen_number));
+	set_cpu_key_k_offset(&entry_key, deh_offset(deh));
+
+	/* update max-hash-collisions counter in reiserfs_sb_info */
+	PROC_INFO_MAX(th->t_super, max_hash_collisions, gen_number);
+
+	if (gen_number != 0) {	/* we need to re-search for the insertion point */
+		if (search_by_entry_key(dir->i_sb, &entry_key, &path, &de) !=
+		    NAME_NOT_FOUND) {
+			reiserfs_warning(dir->i_sb,
+					 "vs-7032: reiserfs_add_entry: "
+					 "entry with this key (%K) already exists",
+					 &entry_key);
+
+			if (buffer != small_buf)
+				kfree(buffer);
+			pathrelse(&path);
+			return -EBUSY;
+		}
+	}
+
+	/* perform the insertion of the entry that we have prepared */
+	retval =
+	    reiserfs_paste_into_item(th, &path, &entry_key, dir, buffer,
+				     paste_size);
+	if (buffer != small_buf)
+		kfree(buffer);
+	if (retval) {
+		reiserfs_check_path(&path);
+		return retval;
+	}
+
+	dir->i_size += paste_size;
+	dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
+	if (!S_ISDIR(inode->i_mode) && visible)
+		// reiserfs_mkdir or reiserfs_rename will do that by itself
+		reiserfs_update_sd(th, dir);
+
+	reiserfs_check_path(&path);
+	return 0;
+}
+
+/* quota utility function, call if you've had to abort after calling
+** new_inode_init, and have not called reiserfs_new_inode yet.
+** This should only be called on inodes that do not have stat data
+** inserted into the tree yet.
+*/
+static int drop_new_inode(struct inode *inode)
+{
+	DQUOT_DROP(inode);
+	make_bad_inode(inode);
+	inode->i_flags |= S_NOQUOTA;
+	iput(inode);
+	return 0;
+}
+
+/* utility function that does setup for reiserfs_new_inode.  
+** DQUOT_INIT needs lots of credits so it's better to have it
+** outside of a transaction, so we had to pull some bits of
+** reiserfs_new_inode out into this func.
+*/
+static int new_inode_init(struct inode *inode, struct inode *dir, int mode)
+{
+
+	/* the quota init calls have to know who to charge the quota to, so
+	 ** we have to set uid and gid here
+	 */
+	inode->i_uid = current->fsuid;
+	inode->i_mode = mode;
+	/* Make inode invalid - just in case we are going to drop it before
+	 * the initialization happens */
+	INODE_PKEY(inode)->k_objectid = 0;
+
+	if (dir->i_mode & S_ISGID) {
+		inode->i_gid = dir->i_gid;
+		if (S_ISDIR(mode))
+			inode->i_mode |= S_ISGID;
+	} else {
+		inode->i_gid = current->fsgid;
+	}
+	DQUOT_INIT(inode);
+	return 0;
+}
+
+static int reiserfs_create(struct inode *dir, struct dentry *dentry, int mode,
+			   struct nameidata *nd)
+{
+	int retval;
+	struct inode *inode;
+	/* We need blocks for transaction + (user+group)*(quotas for new inode + update of quota for directory owner) */
+	int jbegin_count =
+	    JOURNAL_PER_BALANCE_CNT * 2 +
+	    2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) +
+		 REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb));
+	struct reiserfs_transaction_handle th;
+	int locked;
+
+	if (!(inode = new_inode(dir->i_sb))) {
+		return -ENOMEM;
+	}
+	new_inode_init(inode, dir, mode);
+
+	locked = reiserfs_cache_default_acl(dir);
+
+	reiserfs_write_lock(dir->i_sb);
+
+	if (locked)
+		reiserfs_write_lock_xattrs(dir->i_sb);
+
+	retval = journal_begin(&th, dir->i_sb, jbegin_count);
+	if (retval) {
+		drop_new_inode(inode);
+		goto out_failed;
+	}
+
+	retval =
+	    reiserfs_new_inode(&th, dir, mode, NULL, 0 /*i_size */ , dentry,
+			       inode);
+	if (retval)
+		goto out_failed;
+
+	if (locked) {
+		reiserfs_write_unlock_xattrs(dir->i_sb);
+		locked = 0;
+	}
+
+	inode->i_op = &reiserfs_file_inode_operations;
+	inode->i_fop = &reiserfs_file_operations;
+	inode->i_mapping->a_ops = &reiserfs_address_space_operations;
+
+	retval =
+	    reiserfs_add_entry(&th, dir, dentry->d_name.name,
+			       dentry->d_name.len, inode, 1 /*visible */ );
+	if (retval) {
+		int err;
+		inode->i_nlink--;
+		reiserfs_update_sd(&th, inode);
+		err = journal_end(&th, dir->i_sb, jbegin_count);
+		if (err)
+			retval = err;
+		iput(inode);
+		goto out_failed;
+	}
+	reiserfs_update_inode_transaction(inode);
+	reiserfs_update_inode_transaction(dir);
+
+	d_instantiate(dentry, inode);
+	retval = journal_end(&th, dir->i_sb, jbegin_count);
+
+      out_failed:
+	if (locked)
+		reiserfs_write_unlock_xattrs(dir->i_sb);
+	reiserfs_write_unlock(dir->i_sb);
+	return retval;
+}
+
+static int reiserfs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+			  dev_t rdev)
+{
+	int retval;
+	struct inode *inode;
+	struct reiserfs_transaction_handle th;
+	/* We need blocks for transaction + (user+group)*(quotas for new inode + update of quota for directory owner) */
+	int jbegin_count =
+	    JOURNAL_PER_BALANCE_CNT * 3 +
+	    2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) +
+		 REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb));
+	int locked;
+
+	if (!new_valid_dev(rdev))
+		return -EINVAL;
+
+	if (!(inode = new_inode(dir->i_sb))) {
+		return -ENOMEM;
+	}
+	new_inode_init(inode, dir, mode);
+
+	locked = reiserfs_cache_default_acl(dir);
+
+	reiserfs_write_lock(dir->i_sb);
+
+	if (locked)
+		reiserfs_write_lock_xattrs(dir->i_sb);
+
+	retval = journal_begin(&th, dir->i_sb, jbegin_count);
+	if (retval) {
+		drop_new_inode(inode);
+		goto out_failed;
+	}
+
+	retval =
+	    reiserfs_new_inode(&th, dir, mode, NULL, 0 /*i_size */ , dentry,
+			       inode);
+	if (retval) {
+		goto out_failed;
+	}
+
+	if (locked) {
+		reiserfs_write_unlock_xattrs(dir->i_sb);
+		locked = 0;
+	}
+
+	inode->i_op = &reiserfs_special_inode_operations;
+	init_special_inode(inode, inode->i_mode, rdev);
+
+	//FIXME: needed for block and char devices only
+	reiserfs_update_sd(&th, inode);
+
+	reiserfs_update_inode_transaction(inode);
+	reiserfs_update_inode_transaction(dir);
+
+	retval =
+	    reiserfs_add_entry(&th, dir, dentry->d_name.name,
+			       dentry->d_name.len, inode, 1 /*visible */ );
+	if (retval) {
+		int err;
+		inode->i_nlink--;
+		reiserfs_update_sd(&th, inode);
+		err = journal_end(&th, dir->i_sb, jbegin_count);
+		if (err)
+			retval = err;
+		iput(inode);
+		goto out_failed;
+	}
+
+	d_instantiate(dentry, inode);
+	retval = journal_end(&th, dir->i_sb, jbegin_count);
+
+      out_failed:
+	if (locked)
+		reiserfs_write_unlock_xattrs(dir->i_sb);
+	reiserfs_write_unlock(dir->i_sb);
+	return retval;
+}
+
+static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+{
+	int retval;
+	struct inode *inode;
+	struct reiserfs_transaction_handle th;
+	/* We need blocks for transaction + (user+group)*(quotas for new inode + update of quota for directory owner) */
+	int jbegin_count =
+	    JOURNAL_PER_BALANCE_CNT * 3 +
+	    2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) +
+		 REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb));
+	int locked;
+
+#ifdef DISPLACE_NEW_PACKING_LOCALITIES
+	/* set flag that new packing locality created and new blocks for the content     * of that directory are not displaced yet */
+	REISERFS_I(dir)->new_packing_locality = 1;
+#endif
+	mode = S_IFDIR | mode;
+	if (!(inode = new_inode(dir->i_sb))) {
+		return -ENOMEM;
+	}
+	new_inode_init(inode, dir, mode);
+
+	locked = reiserfs_cache_default_acl(dir);
+
+	reiserfs_write_lock(dir->i_sb);
+	if (locked)
+		reiserfs_write_lock_xattrs(dir->i_sb);
+
+	retval = journal_begin(&th, dir->i_sb, jbegin_count);
+	if (retval) {
+		drop_new_inode(inode);
+		goto out_failed;
+	}
+
+	/* inc the link count now, so another writer doesn't overflow it while
+	 ** we sleep later on.
+	 */
+	INC_DIR_INODE_NLINK(dir)
+
+	    retval = reiserfs_new_inode(&th, dir, mode, NULL /*symlink */ ,
+					old_format_only(dir->i_sb) ?
+					EMPTY_DIR_SIZE_V1 : EMPTY_DIR_SIZE,
+					dentry, inode);
+	if (retval) {
+		dir->i_nlink--;
+		goto out_failed;
+	}
+
+	if (locked) {
+		reiserfs_write_unlock_xattrs(dir->i_sb);
+		locked = 0;
+	}
+
+	reiserfs_update_inode_transaction(inode);
+	reiserfs_update_inode_transaction(dir);
+
+	inode->i_op = &reiserfs_dir_inode_operations;
+	inode->i_fop = &reiserfs_dir_operations;
+
+	// note, _this_ add_entry will not update dir's stat data
+	retval =
+	    reiserfs_add_entry(&th, dir, dentry->d_name.name,
+			       dentry->d_name.len, inode, 1 /*visible */ );
+	if (retval) {
+		int err;
+		inode->i_nlink = 0;
+		DEC_DIR_INODE_NLINK(dir);
+		reiserfs_update_sd(&th, inode);
+		err = journal_end(&th, dir->i_sb, jbegin_count);
+		if (err)
+			retval = err;
+		iput(inode);
+		goto out_failed;
+	}
+	// the above add_entry did not update dir's stat data
+	reiserfs_update_sd(&th, dir);
+
+	d_instantiate(dentry, inode);
+	retval = journal_end(&th, dir->i_sb, jbegin_count);
+      out_failed:
+	if (locked)
+		reiserfs_write_unlock_xattrs(dir->i_sb);
+	reiserfs_write_unlock(dir->i_sb);
+	return retval;
+}
+
+static inline int reiserfs_empty_dir(struct inode *inode)
+{
+	/* we can cheat because an old format dir cannot have
+	 ** EMPTY_DIR_SIZE, and a new format dir cannot have
+	 ** EMPTY_DIR_SIZE_V1.  So, if the inode is either size, 
+	 ** regardless of disk format version, the directory is empty.
+	 */
+	if (inode->i_size != EMPTY_DIR_SIZE &&
+	    inode->i_size != EMPTY_DIR_SIZE_V1) {
+		return 0;
+	}
+	return 1;
+}
+
+static int reiserfs_rmdir(struct inode *dir, struct dentry *dentry)
+{
+	int retval, err;
+	struct inode *inode;
+	struct reiserfs_transaction_handle th;
+	int jbegin_count;
+	INITIALIZE_PATH(path);
+	struct reiserfs_dir_entry de;
+
+	/* we will be doing 2 balancings and update 2 stat data, we change quotas
+	 * of the owner of the directory and of the owner of the parent directory.
+	 * The quota structure is possibly deleted only on last iput => outside
+	 * of this transaction */
+	jbegin_count =
+	    JOURNAL_PER_BALANCE_CNT * 2 + 2 +
+	    4 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb);
+
+	reiserfs_write_lock(dir->i_sb);
+	retval = journal_begin(&th, dir->i_sb, jbegin_count);
+	if (retval)
+		goto out_rmdir;
+
+	de.de_gen_number_bit_string = NULL;
+	if ((retval =
+	     reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len,
+				 &path, &de)) == NAME_NOT_FOUND) {
+		retval = -ENOENT;
+		goto end_rmdir;
+	} else if (retval == IO_ERROR) {
+		retval = -EIO;
+		goto end_rmdir;
+	}
+
+	inode = dentry->d_inode;
+
+	reiserfs_update_inode_transaction(inode);
+	reiserfs_update_inode_transaction(dir);
+
+	if (de.de_objectid != inode->i_ino) {
+		// FIXME: compare key of an object and a key found in the
+		// entry
+		retval = -EIO;
+		goto end_rmdir;
+	}
+	if (!reiserfs_empty_dir(inode)) {
+		retval = -ENOTEMPTY;
+		goto end_rmdir;
+	}
+
+	/* cut entry from dir directory */
+	retval = reiserfs_cut_from_item(&th, &path, &(de.de_entry_key), dir, NULL,	/* page */
+					0 /*new file size - not used here */ );
+	if (retval < 0)
+		goto end_rmdir;
+
+	if (inode->i_nlink != 2 && inode->i_nlink != 1)
+		reiserfs_warning(inode->i_sb, "%s: empty directory has nlink "
+				 "!= 2 (%d)", __func__, inode->i_nlink);
+
+	clear_nlink(inode);
+	inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
+	reiserfs_update_sd(&th, inode);
+
+	DEC_DIR_INODE_NLINK(dir)
+	    dir->i_size -= (DEH_SIZE + de.de_entrylen);
+	reiserfs_update_sd(&th, dir);
+
+	/* prevent empty directory from getting lost */
+	add_save_link(&th, inode, 0 /* not truncate */ );
+
+	retval = journal_end(&th, dir->i_sb, jbegin_count);
+	reiserfs_check_path(&path);
+      out_rmdir:
+	reiserfs_write_unlock(dir->i_sb);
+	return retval;
+
+      end_rmdir:
+	/* we must release path, because we did not call
+	   reiserfs_cut_from_item, or reiserfs_cut_from_item does not
+	   release path if operation was not complete */
+	pathrelse(&path);
+	err = journal_end(&th, dir->i_sb, jbegin_count);
+	reiserfs_write_unlock(dir->i_sb);
+	return err ? err : retval;
+}
+
+static int reiserfs_unlink(struct inode *dir, struct dentry *dentry)
+{
+	int retval, err;
+	struct inode *inode;
+	struct reiserfs_dir_entry de;
+	INITIALIZE_PATH(path);
+	struct reiserfs_transaction_handle th;
+	int jbegin_count;
+	unsigned long savelink;
+
+	inode = dentry->d_inode;
+
+	/* in this transaction we can be doing at max two balancings and update
+	 * two stat datas, we change quotas of the owner of the directory and of
+	 * the owner of the parent directory. The quota structure is possibly
+	 * deleted only on iput => outside of this transaction */
+	jbegin_count =
+	    JOURNAL_PER_BALANCE_CNT * 2 + 2 +
+	    4 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb);
+
+	reiserfs_write_lock(dir->i_sb);
+	retval = journal_begin(&th, dir->i_sb, jbegin_count);
+	if (retval)
+		goto out_unlink;
+
+	de.de_gen_number_bit_string = NULL;
+	if ((retval =
+	     reiserfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len,
+				 &path, &de)) == NAME_NOT_FOUND) {
+		retval = -ENOENT;
+		goto end_unlink;
+	} else if (retval == IO_ERROR) {
+		retval = -EIO;
+		goto end_unlink;
+	}
+
+	reiserfs_update_inode_transaction(inode);
+	reiserfs_update_inode_transaction(dir);
+
+	if (de.de_objectid != inode->i_ino) {
+		// FIXME: compare key of an object and a key found in the
+		// entry
+		retval = -EIO;
+		goto end_unlink;
+	}
+
+	if (!inode->i_nlink) {
+		reiserfs_warning(inode->i_sb, "%s: deleting nonexistent file "
+				 "(%s:%lu), %d", __func__,
+				 reiserfs_bdevname(inode->i_sb), inode->i_ino,
+				 inode->i_nlink);
+		inode->i_nlink = 1;
+	}
+
+	drop_nlink(inode);
+
+	/*
+	 * we schedule before doing the add_save_link call, save the link
+	 * count so we don't race
+	 */
+	savelink = inode->i_nlink;
+
+	retval =
+	    reiserfs_cut_from_item(&th, &path, &(de.de_entry_key), dir, NULL,
+				   0);
+	if (retval < 0) {
+		inc_nlink(inode);
+		goto end_unlink;
+	}
+	inode->i_ctime = CURRENT_TIME_SEC;
+	reiserfs_update_sd(&th, inode);
+
+	dir->i_size -= (de.de_entrylen + DEH_SIZE);
+	dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
+	reiserfs_update_sd(&th, dir);
+
+	if (!savelink)
+		/* prevent file from getting lost */
+		add_save_link(&th, inode, 0 /* not truncate */ );
+
+	retval = journal_end(&th, dir->i_sb, jbegin_count);
+	reiserfs_check_path(&path);
+	reiserfs_write_unlock(dir->i_sb);
+	return retval;
+
+      end_unlink:
+	pathrelse(&path);
+	err = journal_end(&th, dir->i_sb, jbegin_count);
+	reiserfs_check_path(&path);
+	if (err)
+		retval = err;
+      out_unlink:
+	reiserfs_write_unlock(dir->i_sb);
+	return retval;
+}
+
+static int reiserfs_symlink(struct inode *parent_dir,
+			    struct dentry *dentry, const char *symname)
+{
+	int retval;
+	struct inode *inode;
+	char *name;
+	int item_len;
+	struct reiserfs_transaction_handle th;
+	int mode = S_IFLNK | S_IRWXUGO;
+	/* We need blocks for transaction + (user+group)*(quotas for new inode + update of quota for directory owner) */
+	int jbegin_count =
+	    JOURNAL_PER_BALANCE_CNT * 3 +
+	    2 * (REISERFS_QUOTA_INIT_BLOCKS(parent_dir->i_sb) +
+		 REISERFS_QUOTA_TRANS_BLOCKS(parent_dir->i_sb));
+
+	if (!(inode = new_inode(parent_dir->i_sb))) {
+		return -ENOMEM;
+	}
+	new_inode_init(inode, parent_dir, mode);
+
+	reiserfs_write_lock(parent_dir->i_sb);
+	item_len = ROUND_UP(strlen(symname));
+	if (item_len > MAX_DIRECT_ITEM_LEN(parent_dir->i_sb->s_blocksize)) {
+		retval = -ENAMETOOLONG;
+		drop_new_inode(inode);
+		goto out_failed;
+	}
+
+	name = kmalloc(item_len, GFP_NOFS);
+	if (!name) {
+		drop_new_inode(inode);
+		retval = -ENOMEM;
+		goto out_failed;
+	}
+	memcpy(name, symname, strlen(symname));
+	padd_item(name, item_len, strlen(symname));
+
+	/* We would inherit the default ACL here, but symlinks don't get ACLs */
+
+	retval = journal_begin(&th, parent_dir->i_sb, jbegin_count);
+	if (retval) {
+		drop_new_inode(inode);
+		kfree(name);
+		goto out_failed;
+	}
+
+	retval =
+	    reiserfs_new_inode(&th, parent_dir, mode, name, strlen(symname),
+			       dentry, inode);
+	kfree(name);
+	if (retval) {		/* reiserfs_new_inode iputs for us */
+		goto out_failed;
+	}
+
+	reiserfs_update_inode_transaction(inode);
+	reiserfs_update_inode_transaction(parent_dir);
+
+	inode->i_op = &reiserfs_symlink_inode_operations;
+	inode->i_mapping->a_ops = &reiserfs_address_space_operations;
+
+	// must be sure this inode is written with this transaction
+	//
+	//reiserfs_update_sd (&th, inode, READ_BLOCKS);
+
+	retval = reiserfs_add_entry(&th, parent_dir, dentry->d_name.name,
+				    dentry->d_name.len, inode, 1 /*visible */ );
+	if (retval) {
+		int err;
+		inode->i_nlink--;
+		reiserfs_update_sd(&th, inode);
+		err = journal_end(&th, parent_dir->i_sb, jbegin_count);
+		if (err)
+			retval = err;
+		iput(inode);
+		goto out_failed;
+	}
+
+	d_instantiate(dentry, inode);
+	retval = journal_end(&th, parent_dir->i_sb, jbegin_count);
+      out_failed:
+	reiserfs_write_unlock(parent_dir->i_sb);
+	return retval;
+}
+
+static int reiserfs_link(struct dentry *old_dentry, struct inode *dir,
+			 struct dentry *dentry)
+{
+	int retval;
+	struct inode *inode = old_dentry->d_inode;
+	struct reiserfs_transaction_handle th;
+	/* We need blocks for transaction + update of quotas for the owners of the directory */
+	int jbegin_count =
+	    JOURNAL_PER_BALANCE_CNT * 3 +
+	    2 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb);
+
+	reiserfs_write_lock(dir->i_sb);
+	if (inode->i_nlink >= REISERFS_LINK_MAX) {
+		//FIXME: sd_nlink is 32 bit for new files
+		reiserfs_write_unlock(dir->i_sb);
+		return -EMLINK;
+	}
+	if (inode->i_nlink == 0) {
+		reiserfs_write_unlock(dir->i_sb);
+		return -ENOENT;
+	}
+
+	/* inc before scheduling so reiserfs_unlink knows we are here */
+	inc_nlink(inode);
+
+	retval = journal_begin(&th, dir->i_sb, jbegin_count);
+	if (retval) {
+		inode->i_nlink--;
+		reiserfs_write_unlock(dir->i_sb);
+		return retval;
+	}
+
+	/* create new entry */
+	retval =
+	    reiserfs_add_entry(&th, dir, dentry->d_name.name,
+			       dentry->d_name.len, inode, 1 /*visible */ );
+
+	reiserfs_update_inode_transaction(inode);
+	reiserfs_update_inode_transaction(dir);
+
+	if (retval) {
+		int err;
+		inode->i_nlink--;
+		err = journal_end(&th, dir->i_sb, jbegin_count);
+		reiserfs_write_unlock(dir->i_sb);
+		return err ? err : retval;
+	}
+
+	inode->i_ctime = CURRENT_TIME_SEC;
+	reiserfs_update_sd(&th, inode);
+
+	atomic_inc(&inode->i_count);
+	d_instantiate(dentry, inode);
+	retval = journal_end(&th, dir->i_sb, jbegin_count);
+	reiserfs_write_unlock(dir->i_sb);
+	return retval;
+}
+
+// de contains information pointing to an entry which 
+static int de_still_valid(const char *name, int len,
+			  struct reiserfs_dir_entry *de)
+{
+	struct reiserfs_dir_entry tmp = *de;
+
+	// recalculate pointer to name and name length
+	set_de_name_and_namelen(&tmp);
+	// FIXME: could check more
+	if (tmp.de_namelen != len || memcmp(name, de->de_name, len))
+		return 0;
+	return 1;
+}
+
+static int entry_points_to_object(const char *name, int len,
+				  struct reiserfs_dir_entry *de,
+				  struct inode *inode)
+{
+	if (!de_still_valid(name, len, de))
+		return 0;
+
+	if (inode) {
+		if (!de_visible(de->de_deh + de->de_entry_num))
+			reiserfs_panic(NULL,
+				       "vs-7042: entry_points_to_object: entry must be visible");
+		return (de->de_objectid == inode->i_ino) ? 1 : 0;
+	}
+
+	/* this must be added hidden entry */
+	if (de_visible(de->de_deh + de->de_entry_num))
+		reiserfs_panic(NULL,
+			       "vs-7043: entry_points_to_object: entry must be visible");
+
+	return 1;
+}
+
+/* sets key of objectid the entry has to point to */
+static void set_ino_in_dir_entry(struct reiserfs_dir_entry *de,
+				 struct reiserfs_key *key)
+{
+	/* JDM These operations are endian safe - both are le */
+	de->de_deh[de->de_entry_num].deh_dir_id = key->k_dir_id;
+	de->de_deh[de->de_entry_num].deh_objectid = key->k_objectid;
+}
+
+/* 
+ * process, that is going to call fix_nodes/do_balance must hold only
+ * one path. If it holds 2 or more, it can get into endless waiting in
+ * get_empty_nodes or its clones 
+ */
+static int reiserfs_rename(struct inode *old_dir, struct dentry *old_dentry,
+			   struct inode *new_dir, struct dentry *new_dentry)
+{
+	int retval;
+	INITIALIZE_PATH(old_entry_path);
+	INITIALIZE_PATH(new_entry_path);
+	INITIALIZE_PATH(dot_dot_entry_path);
+	struct item_head new_entry_ih, old_entry_ih, dot_dot_ih;
+	struct reiserfs_dir_entry old_de, new_de, dot_dot_de;
+	struct inode *old_inode, *new_dentry_inode;
+	struct reiserfs_transaction_handle th;
+	int jbegin_count;
+	umode_t old_inode_mode;
+	unsigned long savelink = 1;
+	struct timespec ctime;
+
+	/* three balancings: (1) old name removal, (2) new name insertion
+	   and (3) maybe "save" link insertion
+	   stat data updates: (1) old directory,
+	   (2) new directory and (3) maybe old object stat data (when it is
+	   directory) and (4) maybe stat data of object to which new entry
+	   pointed initially and (5) maybe block containing ".." of
+	   renamed directory
+	   quota updates: two parent directories */
+	jbegin_count =
+	    JOURNAL_PER_BALANCE_CNT * 3 + 5 +
+	    4 * REISERFS_QUOTA_TRANS_BLOCKS(old_dir->i_sb);
+
+	old_inode = old_dentry->d_inode;
+	new_dentry_inode = new_dentry->d_inode;
+
+	// make sure, that oldname still exists and points to an object we
+	// are going to rename
+	old_de.de_gen_number_bit_string = NULL;
+	reiserfs_write_lock(old_dir->i_sb);
+	retval =
+	    reiserfs_find_entry(old_dir, old_dentry->d_name.name,
+				old_dentry->d_name.len, &old_entry_path,
+				&old_de);
+	pathrelse(&old_entry_path);
+	if (retval == IO_ERROR) {
+		reiserfs_write_unlock(old_dir->i_sb);
+		return -EIO;
+	}
+
+	if (retval != NAME_FOUND || old_de.de_objectid != old_inode->i_ino) {
+		reiserfs_write_unlock(old_dir->i_sb);
+		return -ENOENT;
+	}
+
+	old_inode_mode = old_inode->i_mode;
+	if (S_ISDIR(old_inode_mode)) {
+		// make sure, that directory being renamed has correct ".." 
+		// and that its new parent directory has not too many links
+		// already
+
+		if (new_dentry_inode) {
+			if (!reiserfs_empty_dir(new_dentry_inode)) {
+				reiserfs_write_unlock(old_dir->i_sb);
+				return -ENOTEMPTY;
+			}
+		}
+
+		/* directory is renamed, its parent directory will be changed, 
+		 ** so find ".." entry 
+		 */
+		dot_dot_de.de_gen_number_bit_string = NULL;
+		retval =
+		    reiserfs_find_entry(old_inode, "..", 2, &dot_dot_entry_path,
+					&dot_dot_de);
+		pathrelse(&dot_dot_entry_path);
+		if (retval != NAME_FOUND) {
+			reiserfs_write_unlock(old_dir->i_sb);
+			return -EIO;
+		}
+
+		/* inode number of .. must equal old_dir->i_ino */
+		if (dot_dot_de.de_objectid != old_dir->i_ino) {
+			reiserfs_write_unlock(old_dir->i_sb);
+			return -EIO;
+		}
+	}
+
+	retval = journal_begin(&th, old_dir->i_sb, jbegin_count);
+	if (retval) {
+		reiserfs_write_unlock(old_dir->i_sb);
+		return retval;
+	}
+
+	/* add new entry (or find the existing one) */
+	retval =
+	    reiserfs_add_entry(&th, new_dir, new_dentry->d_name.name,
+			       new_dentry->d_name.len, old_inode, 0);
+	if (retval == -EEXIST) {
+		if (!new_dentry_inode) {
+			reiserfs_panic(old_dir->i_sb,
+				       "vs-7050: new entry is found, new inode == 0\n");
+		}
+	} else if (retval) {
+		int err = journal_end(&th, old_dir->i_sb, jbegin_count);
+		reiserfs_write_unlock(old_dir->i_sb);
+		return err ? err : retval;
+	}
+
+	reiserfs_update_inode_transaction(old_dir);
+	reiserfs_update_inode_transaction(new_dir);
+
+	/* this makes it so an fsync on an open fd for the old name will
+	 ** commit the rename operation
+	 */
+	reiserfs_update_inode_transaction(old_inode);
+
+	if (new_dentry_inode)
+		reiserfs_update_inode_transaction(new_dentry_inode);
+
+	while (1) {
+		// look for old name using corresponding entry key (found by reiserfs_find_entry)
+		if ((retval =
+		     search_by_entry_key(new_dir->i_sb, &old_de.de_entry_key,
+					 &old_entry_path,
+					 &old_de)) != NAME_FOUND) {
+			pathrelse(&old_entry_path);
+			journal_end(&th, old_dir->i_sb, jbegin_count);
+			reiserfs_write_unlock(old_dir->i_sb);
+			return -EIO;
+		}
+
+		copy_item_head(&old_entry_ih, get_ih(&old_entry_path));
+
+		reiserfs_prepare_for_journal(old_inode->i_sb, old_de.de_bh, 1);
+
+		// look for new name by reiserfs_find_entry
+		new_de.de_gen_number_bit_string = NULL;
+		retval =
+		    reiserfs_find_entry(new_dir, new_dentry->d_name.name,
+					new_dentry->d_name.len, &new_entry_path,
+					&new_de);
+		// reiserfs_add_entry should not return IO_ERROR, because it is called with essentially same parameters from
+		// reiserfs_add_entry above, and we'll catch any i/o errors before we get here.
+		if (retval != NAME_FOUND_INVISIBLE && retval != NAME_FOUND) {
+			pathrelse(&new_entry_path);
+			pathrelse(&old_entry_path);
+			journal_end(&th, old_dir->i_sb, jbegin_count);
+			reiserfs_write_unlock(old_dir->i_sb);
+			return -EIO;
+		}
+
+		copy_item_head(&new_entry_ih, get_ih(&new_entry_path));
+
+		reiserfs_prepare_for_journal(old_inode->i_sb, new_de.de_bh, 1);
+
+		if (S_ISDIR(old_inode->i_mode)) {
+			if ((retval =
+			     search_by_entry_key(new_dir->i_sb,
+						 &dot_dot_de.de_entry_key,
+						 &dot_dot_entry_path,
+						 &dot_dot_de)) != NAME_FOUND) {
+				pathrelse(&dot_dot_entry_path);
+				pathrelse(&new_entry_path);
+				pathrelse(&old_entry_path);
+				journal_end(&th, old_dir->i_sb, jbegin_count);
+				reiserfs_write_unlock(old_dir->i_sb);
+				return -EIO;
+			}
+			copy_item_head(&dot_dot_ih,
+				       get_ih(&dot_dot_entry_path));
+			// node containing ".." gets into transaction
+			reiserfs_prepare_for_journal(old_inode->i_sb,
+						     dot_dot_de.de_bh, 1);
+		}
+		/* we should check seals here, not do
+		   this stuff, yes? Then, having
+		   gathered everything into RAM we
+		   should lock the buffers, yes?  -Hans */
+		/* probably.  our rename needs to hold more 
+		 ** than one path at once.  The seals would 
+		 ** have to be written to deal with multi-path 
+		 ** issues -chris
+		 */
+		/* sanity checking before doing the rename - avoid races many
+		 ** of the above checks could have scheduled.  We have to be
+		 ** sure our items haven't been shifted by another process.
+		 */
+		if (item_moved(&new_entry_ih, &new_entry_path) ||
+		    !entry_points_to_object(new_dentry->d_name.name,
+					    new_dentry->d_name.len,
+					    &new_de, new_dentry_inode) ||
+		    item_moved(&old_entry_ih, &old_entry_path) ||
+		    !entry_points_to_object(old_dentry->d_name.name,
+					    old_dentry->d_name.len,
+					    &old_de, old_inode)) {
+			reiserfs_restore_prepared_buffer(old_inode->i_sb,
+							 new_de.de_bh);
+			reiserfs_restore_prepared_buffer(old_inode->i_sb,
+							 old_de.de_bh);
+			if (S_ISDIR(old_inode_mode))
+				reiserfs_restore_prepared_buffer(old_inode->
+								 i_sb,
+								 dot_dot_de.
+								 de_bh);
+			continue;
+		}
+		if (S_ISDIR(old_inode_mode)) {
+			if (item_moved(&dot_dot_ih, &dot_dot_entry_path) ||
+			    !entry_points_to_object("..", 2, &dot_dot_de,
+						    old_dir)) {
+				reiserfs_restore_prepared_buffer(old_inode->
+								 i_sb,
+								 old_de.de_bh);
+				reiserfs_restore_prepared_buffer(old_inode->
+								 i_sb,
+								 new_de.de_bh);
+				reiserfs_restore_prepared_buffer(old_inode->
+								 i_sb,
+								 dot_dot_de.
+								 de_bh);
+				continue;
+			}
+		}
+
+		RFALSE(S_ISDIR(old_inode_mode) &&
+		       !buffer_journal_prepared(dot_dot_de.de_bh), "");
+
+		break;
+	}
+
+	/* ok, all the changes can be done in one fell swoop when we
+	   have claimed all the buffers needed. */
+
+	mark_de_visible(new_de.de_deh + new_de.de_entry_num);
+	set_ino_in_dir_entry(&new_de, INODE_PKEY(old_inode));
+	journal_mark_dirty(&th, old_dir->i_sb, new_de.de_bh);
+
+	mark_de_hidden(old_de.de_deh + old_de.de_entry_num);
+	journal_mark_dirty(&th, old_dir->i_sb, old_de.de_bh);
+	ctime = CURRENT_TIME_SEC;
+	old_dir->i_ctime = old_dir->i_mtime = ctime;
+	new_dir->i_ctime = new_dir->i_mtime = ctime;
+	/* thanks to Alex Adriaanse <alex_a@caltech.edu> for patch which adds ctime update of
+	   renamed object */
+	old_inode->i_ctime = ctime;
+
+	if (new_dentry_inode) {
+		// adjust link number of the victim
+		if (S_ISDIR(new_dentry_inode->i_mode)) {
+			clear_nlink(new_dentry_inode);
+		} else {
+			drop_nlink(new_dentry_inode);
+		}
+		new_dentry_inode->i_ctime = ctime;
+		savelink = new_dentry_inode->i_nlink;
+	}
+
+	if (S_ISDIR(old_inode_mode)) {
+		// adjust ".." of renamed directory 
+		set_ino_in_dir_entry(&dot_dot_de, INODE_PKEY(new_dir));
+		journal_mark_dirty(&th, new_dir->i_sb, dot_dot_de.de_bh);
+
+		if (!new_dentry_inode)
+			/* there (in new_dir) was no directory, so it got new link
+			   (".."  of renamed directory) */
+			INC_DIR_INODE_NLINK(new_dir);
+
+		/* old directory lost one link - ".. " of renamed directory */
+		DEC_DIR_INODE_NLINK(old_dir);
+	}
+	// looks like in 2.3.99pre3 brelse is atomic. so we can use pathrelse
+	pathrelse(&new_entry_path);
+	pathrelse(&dot_dot_entry_path);
+
+	// FIXME: this reiserfs_cut_from_item's return value may screw up
+	// anybody, but it will panic if will not be able to find the
+	// entry. This needs one more clean up
+	if (reiserfs_cut_from_item
+	    (&th, &old_entry_path, &(old_de.de_entry_key), old_dir, NULL,
+	     0) < 0)
+		reiserfs_warning(old_dir->i_sb,
+				 "vs-7060: reiserfs_rename: couldn't not cut old name. Fsck later?");
+
+	old_dir->i_size -= DEH_SIZE + old_de.de_entrylen;
+
+	reiserfs_update_sd(&th, old_dir);
+	reiserfs_update_sd(&th, new_dir);
+	reiserfs_update_sd(&th, old_inode);
+
+	if (new_dentry_inode) {
+		if (savelink == 0)
+			add_save_link(&th, new_dentry_inode,
+				      0 /* not truncate */ );
+		reiserfs_update_sd(&th, new_dentry_inode);
+	}
+
+	retval = journal_end(&th, old_dir->i_sb, jbegin_count);
+	reiserfs_write_unlock(old_dir->i_sb);
+	return retval;
+}
+
+/*
+ * directories can handle most operations...
+ */
+const struct inode_operations reiserfs_dir_inode_operations = {
+	//&reiserfs_dir_operations,   /* default_file_ops */
+	.create = reiserfs_create,
+	.lookup = reiserfs_lookup,
+	.link = reiserfs_link,
+	.unlink = reiserfs_unlink,
+	.symlink = reiserfs_symlink,
+	.mkdir = reiserfs_mkdir,
+	.rmdir = reiserfs_rmdir,
+	.mknod = reiserfs_mknod,
+	.rename = reiserfs_rename,
+	.setattr = reiserfs_setattr,
+	.setxattr = reiserfs_setxattr,
+	.getxattr = reiserfs_getxattr,
+	.listxattr = reiserfs_listxattr,
+	.removexattr = reiserfs_removexattr,
+	.permission = reiserfs_permission,
+};
+
+/*
+ * symlink operations.. same as page_symlink_inode_operations, with xattr
+ * stuff added
+ */
+const struct inode_operations reiserfs_symlink_inode_operations = {
+	.readlink = generic_readlink,
+	.follow_link = page_follow_link_light,
+	.put_link = page_put_link,
+	.setattr = reiserfs_setattr,
+	.setxattr = reiserfs_setxattr,
+	.getxattr = reiserfs_getxattr,
+	.listxattr = reiserfs_listxattr,
+	.removexattr = reiserfs_removexattr,
+	.permission = reiserfs_permission,
+
+};
+
+/*
+ * special file operations.. just xattr/acl stuff
+ */
+const struct inode_operations reiserfs_special_inode_operations = {
+	.setattr = reiserfs_setattr,
+	.setxattr = reiserfs_setxattr,
+	.getxattr = reiserfs_getxattr,
+	.listxattr = reiserfs_listxattr,
+	.removexattr = reiserfs_removexattr,
+	.permission = reiserfs_permission,
+
+};
diff --git a/fs/reiserfs/objectid.c b/fs/reiserfs/objectid.c
new file mode 100644
index 0000000..ea0cf8c
--- /dev/null
+++ b/fs/reiserfs/objectid.c
@@ -0,0 +1,205 @@
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ */
+
+#include <linux/string.h>
+#include <linux/random.h>
+#include <linux/time.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/reiserfs_fs_sb.h>
+
+// find where objectid map starts
+#define objectid_map(s,rs) (old_format_only (s) ? \
+                         (__le32 *)((struct reiserfs_super_block_v1 *)(rs) + 1) :\
+			 (__le32 *)((rs) + 1))
+
+#ifdef CONFIG_REISERFS_CHECK
+
+static void check_objectid_map(struct super_block *s, __le32 * map)
+{
+	if (le32_to_cpu(map[0]) != 1)
+		reiserfs_panic(s,
+			       "vs-15010: check_objectid_map: map corrupted: %lx",
+			       (long unsigned int)le32_to_cpu(map[0]));
+
+	// FIXME: add something else here
+}
+
+#else
+static void check_objectid_map(struct super_block *s, __le32 * map)
+{;
+}
+#endif
+
+/* When we allocate objectids we allocate the first unused objectid.
+   Each sequence of objectids in use (the odd sequences) is followed
+   by a sequence of objectids not in use (the even sequences).  We
+   only need to record the last objectid in each of these sequences
+   (both the odd and even sequences) in order to fully define the
+   boundaries of the sequences.  A consequence of allocating the first
+   objectid not in use is that under most conditions this scheme is
+   extremely compact.  The exception is immediately after a sequence
+   of operations which deletes a large number of objects of
+   non-sequential objectids, and even then it will become compact
+   again as soon as more objects are created.  Note that many
+   interesting optimizations of layout could result from complicating
+   objectid assignment, but we have deferred making them for now. */
+
+/* get unique object identifier */
+__u32 reiserfs_get_unused_objectid(struct reiserfs_transaction_handle *th)
+{
+	struct super_block *s = th->t_super;
+	struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
+	__le32 *map = objectid_map(s, rs);
+	__u32 unused_objectid;
+
+	BUG_ON(!th->t_trans_id);
+
+	check_objectid_map(s, map);
+
+	reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
+	/* comment needed -Hans */
+	unused_objectid = le32_to_cpu(map[1]);
+	if (unused_objectid == U32_MAX) {
+		reiserfs_warning(s, "%s: no more object ids", __func__);
+		reiserfs_restore_prepared_buffer(s, SB_BUFFER_WITH_SB(s));
+		return 0;
+	}
+
+	/* This incrementation allocates the first unused objectid. That
+	   is to say, the first entry on the objectid map is the first
+	   unused objectid, and by incrementing it we use it.  See below
+	   where we check to see if we eliminated a sequence of unused
+	   objectids.... */
+	map[1] = cpu_to_le32(unused_objectid + 1);
+
+	/* Now we check to see if we eliminated the last remaining member of
+	   the first even sequence (and can eliminate the sequence by
+	   eliminating its last objectid from oids), and can collapse the
+	   first two odd sequences into one sequence.  If so, then the net
+	   result is to eliminate a pair of objectids from oids.  We do this
+	   by shifting the entire map to the left. */
+	if (sb_oid_cursize(rs) > 2 && map[1] == map[2]) {
+		memmove(map + 1, map + 3,
+			(sb_oid_cursize(rs) - 3) * sizeof(__u32));
+		set_sb_oid_cursize(rs, sb_oid_cursize(rs) - 2);
+	}
+
+	journal_mark_dirty(th, s, SB_BUFFER_WITH_SB(s));
+	return unused_objectid;
+}
+
+/* makes object identifier unused */
+void reiserfs_release_objectid(struct reiserfs_transaction_handle *th,
+			       __u32 objectid_to_release)
+{
+	struct super_block *s = th->t_super;
+	struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
+	__le32 *map = objectid_map(s, rs);
+	int i = 0;
+
+	BUG_ON(!th->t_trans_id);
+	//return;
+	check_objectid_map(s, map);
+
+	reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
+	journal_mark_dirty(th, s, SB_BUFFER_WITH_SB(s));
+
+	/* start at the beginning of the objectid map (i = 0) and go to
+	   the end of it (i = disk_sb->s_oid_cursize).  Linear search is
+	   what we use, though it is possible that binary search would be
+	   more efficient after performing lots of deletions (which is
+	   when oids is large.)  We only check even i's. */
+	while (i < sb_oid_cursize(rs)) {
+		if (objectid_to_release == le32_to_cpu(map[i])) {
+			/* This incrementation unallocates the objectid. */
+			//map[i]++;
+			le32_add_cpu(&map[i], 1);
+
+			/* Did we unallocate the last member of an odd sequence, and can shrink oids? */
+			if (map[i] == map[i + 1]) {
+				/* shrink objectid map */
+				memmove(map + i, map + i + 2,
+					(sb_oid_cursize(rs) - i -
+					 2) * sizeof(__u32));
+				//disk_sb->s_oid_cursize -= 2;
+				set_sb_oid_cursize(rs, sb_oid_cursize(rs) - 2);
+
+				RFALSE(sb_oid_cursize(rs) < 2 ||
+				       sb_oid_cursize(rs) > sb_oid_maxsize(rs),
+				       "vs-15005: objectid map corrupted cur_size == %d (max == %d)",
+				       sb_oid_cursize(rs), sb_oid_maxsize(rs));
+			}
+			return;
+		}
+
+		if (objectid_to_release > le32_to_cpu(map[i]) &&
+		    objectid_to_release < le32_to_cpu(map[i + 1])) {
+			/* size of objectid map is not changed */
+			if (objectid_to_release + 1 == le32_to_cpu(map[i + 1])) {
+				//objectid_map[i+1]--;
+				le32_add_cpu(&map[i + 1], -1);
+				return;
+			}
+
+			/* JDM comparing two little-endian values for equality -- safe */
+			if (sb_oid_cursize(rs) == sb_oid_maxsize(rs)) {
+				/* objectid map must be expanded, but there is no space */
+				PROC_INFO_INC(s, leaked_oid);
+				return;
+			}
+
+			/* expand the objectid map */
+			memmove(map + i + 3, map + i + 1,
+				(sb_oid_cursize(rs) - i - 1) * sizeof(__u32));
+			map[i + 1] = cpu_to_le32(objectid_to_release);
+			map[i + 2] = cpu_to_le32(objectid_to_release + 1);
+			set_sb_oid_cursize(rs, sb_oid_cursize(rs) + 2);
+			return;
+		}
+		i += 2;
+	}
+
+	reiserfs_warning(s,
+			 "vs-15011: reiserfs_release_objectid: tried to free free object id (%lu)",
+			 (long unsigned)objectid_to_release);
+}
+
+int reiserfs_convert_objectid_map_v1(struct super_block *s)
+{
+	struct reiserfs_super_block *disk_sb = SB_DISK_SUPER_BLOCK(s);
+	int cur_size = sb_oid_cursize(disk_sb);
+	int new_size = (s->s_blocksize - SB_SIZE) / sizeof(__u32) / 2 * 2;
+	int old_max = sb_oid_maxsize(disk_sb);
+	struct reiserfs_super_block_v1 *disk_sb_v1;
+	__le32 *objectid_map, *new_objectid_map;
+	int i;
+
+	disk_sb_v1 =
+	    (struct reiserfs_super_block_v1 *)(SB_BUFFER_WITH_SB(s)->b_data);
+	objectid_map = (__le32 *) (disk_sb_v1 + 1);
+	new_objectid_map = (__le32 *) (disk_sb + 1);
+
+	if (cur_size > new_size) {
+		/* mark everyone used that was listed as free at the end of the objectid
+		 ** map 
+		 */
+		objectid_map[new_size - 1] = objectid_map[cur_size - 1];
+		set_sb_oid_cursize(disk_sb, new_size);
+	}
+	/* move the smaller objectid map past the end of the new super */
+	for (i = new_size - 1; i >= 0; i--) {
+		objectid_map[i + (old_max - new_size)] = objectid_map[i];
+	}
+
+	/* set the max size so we don't overflow later */
+	set_sb_oid_maxsize(disk_sb, new_size);
+
+	/* Zero out label and generate random UUID */
+	memset(disk_sb->s_label, 0, sizeof(disk_sb->s_label));
+	generate_random_uuid(disk_sb->s_uuid);
+
+	/* finally, zero out the unused chunk of the new super */
+	memset(disk_sb->s_unused, 0, sizeof(disk_sb->s_unused));
+	return 0;
+}
diff --git a/fs/reiserfs/prints.c b/fs/reiserfs/prints.c
new file mode 100644
index 0000000..740bb8c
--- /dev/null
+++ b/fs/reiserfs/prints.c
@@ -0,0 +1,748 @@
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ */
+
+#include <linux/time.h>
+#include <linux/fs.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/string.h>
+#include <linux/buffer_head.h>
+
+#include <stdarg.h>
+
+static char error_buf[1024];
+static char fmt_buf[1024];
+static char off_buf[80];
+
+static char *reiserfs_cpu_offset(struct cpu_key *key)
+{
+	if (cpu_key_k_type(key) == TYPE_DIRENTRY)
+		sprintf(off_buf, "%Lu(%Lu)",
+			(unsigned long long)
+			GET_HASH_VALUE(cpu_key_k_offset(key)),
+			(unsigned long long)
+			GET_GENERATION_NUMBER(cpu_key_k_offset(key)));
+	else
+		sprintf(off_buf, "0x%Lx",
+			(unsigned long long)cpu_key_k_offset(key));
+	return off_buf;
+}
+
+static char *le_offset(struct reiserfs_key *key)
+{
+	int version;
+
+	version = le_key_version(key);
+	if (le_key_k_type(version, key) == TYPE_DIRENTRY)
+		sprintf(off_buf, "%Lu(%Lu)",
+			(unsigned long long)
+			GET_HASH_VALUE(le_key_k_offset(version, key)),
+			(unsigned long long)
+			GET_GENERATION_NUMBER(le_key_k_offset(version, key)));
+	else
+		sprintf(off_buf, "0x%Lx",
+			(unsigned long long)le_key_k_offset(version, key));
+	return off_buf;
+}
+
+static char *cpu_type(struct cpu_key *key)
+{
+	if (cpu_key_k_type(key) == TYPE_STAT_DATA)
+		return "SD";
+	if (cpu_key_k_type(key) == TYPE_DIRENTRY)
+		return "DIR";
+	if (cpu_key_k_type(key) == TYPE_DIRECT)
+		return "DIRECT";
+	if (cpu_key_k_type(key) == TYPE_INDIRECT)
+		return "IND";
+	return "UNKNOWN";
+}
+
+static char *le_type(struct reiserfs_key *key)
+{
+	int version;
+
+	version = le_key_version(key);
+
+	if (le_key_k_type(version, key) == TYPE_STAT_DATA)
+		return "SD";
+	if (le_key_k_type(version, key) == TYPE_DIRENTRY)
+		return "DIR";
+	if (le_key_k_type(version, key) == TYPE_DIRECT)
+		return "DIRECT";
+	if (le_key_k_type(version, key) == TYPE_INDIRECT)
+		return "IND";
+	return "UNKNOWN";
+}
+
+/* %k */
+static void sprintf_le_key(char *buf, struct reiserfs_key *key)
+{
+	if (key)
+		sprintf(buf, "[%d %d %s %s]", le32_to_cpu(key->k_dir_id),
+			le32_to_cpu(key->k_objectid), le_offset(key),
+			le_type(key));
+	else
+		sprintf(buf, "[NULL]");
+}
+
+/* %K */
+static void sprintf_cpu_key(char *buf, struct cpu_key *key)
+{
+	if (key)
+		sprintf(buf, "[%d %d %s %s]", key->on_disk_key.k_dir_id,
+			key->on_disk_key.k_objectid, reiserfs_cpu_offset(key),
+			cpu_type(key));
+	else
+		sprintf(buf, "[NULL]");
+}
+
+static void sprintf_de_head(char *buf, struct reiserfs_de_head *deh)
+{
+	if (deh)
+		sprintf(buf,
+			"[offset=%d dir_id=%d objectid=%d location=%d state=%04x]",
+			deh_offset(deh), deh_dir_id(deh), deh_objectid(deh),
+			deh_location(deh), deh_state(deh));
+	else
+		sprintf(buf, "[NULL]");
+
+}
+
+static void sprintf_item_head(char *buf, struct item_head *ih)
+{
+	if (ih) {
+		strcpy(buf,
+		       (ih_version(ih) == KEY_FORMAT_3_6) ? "*3.6* " : "*3.5*");
+		sprintf_le_key(buf + strlen(buf), &(ih->ih_key));
+		sprintf(buf + strlen(buf), ", item_len %d, item_location %d, "
+			"free_space(entry_count) %d",
+			ih_item_len(ih), ih_location(ih), ih_free_space(ih));
+	} else
+		sprintf(buf, "[NULL]");
+}
+
+static void sprintf_direntry(char *buf, struct reiserfs_dir_entry *de)
+{
+	char name[20];
+
+	memcpy(name, de->de_name, de->de_namelen > 19 ? 19 : de->de_namelen);
+	name[de->de_namelen > 19 ? 19 : de->de_namelen] = 0;
+	sprintf(buf, "\"%s\"==>[%d %d]", name, de->de_dir_id, de->de_objectid);
+}
+
+static void sprintf_block_head(char *buf, struct buffer_head *bh)
+{
+	sprintf(buf, "level=%d, nr_items=%d, free_space=%d rdkey ",
+		B_LEVEL(bh), B_NR_ITEMS(bh), B_FREE_SPACE(bh));
+}
+
+static void sprintf_buffer_head(char *buf, struct buffer_head *bh)
+{
+	char b[BDEVNAME_SIZE];
+
+	sprintf(buf,
+		"dev %s, size %zd, blocknr %llu, count %d, state 0x%lx, page %p, (%s, %s, %s)",
+		bdevname(bh->b_bdev, b), bh->b_size,
+		(unsigned long long)bh->b_blocknr, atomic_read(&(bh->b_count)),
+		bh->b_state, bh->b_page,
+		buffer_uptodate(bh) ? "UPTODATE" : "!UPTODATE",
+		buffer_dirty(bh) ? "DIRTY" : "CLEAN",
+		buffer_locked(bh) ? "LOCKED" : "UNLOCKED");
+}
+
+static void sprintf_disk_child(char *buf, struct disk_child *dc)
+{
+	sprintf(buf, "[dc_number=%d, dc_size=%u]", dc_block_number(dc),
+		dc_size(dc));
+}
+
+static char *is_there_reiserfs_struct(char *fmt, int *what, int *skip)
+{
+	char *k = fmt;
+
+	*skip = 0;
+
+	while ((k = strchr(k, '%')) != NULL) {
+		if (k[1] == 'k' || k[1] == 'K' || k[1] == 'h' || k[1] == 't' ||
+		    k[1] == 'z' || k[1] == 'b' || k[1] == 'y' || k[1] == 'a') {
+			*what = k[1];
+			break;
+		}
+		(*skip)++;
+		k++;
+	}
+	return k;
+}
+
+/* debugging reiserfs we used to print out a lot of different
+   variables, like keys, item headers, buffer heads etc. Values of
+   most fields matter. So it took a long time just to write
+   appropriative printk. With this reiserfs_warning you can use format
+   specification for complex structures like you used to do with
+   printfs for integers, doubles and pointers. For instance, to print
+   out key structure you have to write just: 
+   reiserfs_warning ("bad key %k", key); 
+   instead of 
+   printk ("bad key %lu %lu %lu %lu", key->k_dir_id, key->k_objectid, 
+           key->k_offset, key->k_uniqueness); 
+*/
+
+static void prepare_error_buf(const char *fmt, va_list args)
+{
+	char *fmt1 = fmt_buf;
+	char *k;
+	char *p = error_buf;
+	int i, j, what, skip;
+
+	strcpy(fmt1, fmt);
+
+	while ((k = is_there_reiserfs_struct(fmt1, &what, &skip)) != NULL) {
+		*k = 0;
+
+		p += vsprintf(p, fmt1, args);
+
+		for (i = 0; i < skip; i++)
+			j = va_arg(args, int);
+
+		switch (what) {
+		case 'k':
+			sprintf_le_key(p, va_arg(args, struct reiserfs_key *));
+			break;
+		case 'K':
+			sprintf_cpu_key(p, va_arg(args, struct cpu_key *));
+			break;
+		case 'h':
+			sprintf_item_head(p, va_arg(args, struct item_head *));
+			break;
+		case 't':
+			sprintf_direntry(p,
+					 va_arg(args,
+						struct reiserfs_dir_entry *));
+			break;
+		case 'y':
+			sprintf_disk_child(p,
+					   va_arg(args, struct disk_child *));
+			break;
+		case 'z':
+			sprintf_block_head(p,
+					   va_arg(args, struct buffer_head *));
+			break;
+		case 'b':
+			sprintf_buffer_head(p,
+					    va_arg(args, struct buffer_head *));
+			break;
+		case 'a':
+			sprintf_de_head(p,
+					va_arg(args,
+					       struct reiserfs_de_head *));
+			break;
+		}
+
+		p += strlen(p);
+		fmt1 = k + 2;
+	}
+	vsprintf(p, fmt1, args);
+
+}
+
+/* in addition to usual conversion specifiers this accepts reiserfs
+   specific conversion specifiers: 
+   %k to print little endian key, 
+   %K to print cpu key, 
+   %h to print item_head,
+   %t to print directory entry 
+   %z to print block head (arg must be struct buffer_head *
+   %b to print buffer_head
+*/
+
+#define do_reiserfs_warning(fmt)\
+{\
+    va_list args;\
+    va_start( args, fmt );\
+    prepare_error_buf( fmt, args );\
+    va_end( args );\
+}
+
+void reiserfs_warning(struct super_block *sb, const char *fmt, ...)
+{
+	do_reiserfs_warning(fmt);
+	if (sb)
+		printk(KERN_WARNING "ReiserFS: %s: warning: %s\n",
+		       reiserfs_bdevname(sb), error_buf);
+	else
+		printk(KERN_WARNING "ReiserFS: warning: %s\n", error_buf);
+}
+
+/* No newline.. reiserfs_info calls can be followed by printk's */
+void reiserfs_info(struct super_block *sb, const char *fmt, ...)
+{
+	do_reiserfs_warning(fmt);
+	if (sb)
+		printk(KERN_NOTICE "ReiserFS: %s: %s",
+		       reiserfs_bdevname(sb), error_buf);
+	else
+		printk(KERN_NOTICE "ReiserFS: %s", error_buf);
+}
+
+/* No newline.. reiserfs_printk calls can be followed by printk's */
+static void reiserfs_printk(const char *fmt, ...)
+{
+	do_reiserfs_warning(fmt);
+	printk(error_buf);
+}
+
+void reiserfs_debug(struct super_block *s, int level, const char *fmt, ...)
+{
+#ifdef CONFIG_REISERFS_CHECK
+	do_reiserfs_warning(fmt);
+	if (s)
+		printk(KERN_DEBUG "ReiserFS: %s: %s\n",
+		       reiserfs_bdevname(s), error_buf);
+	else
+		printk(KERN_DEBUG "ReiserFS: %s\n", error_buf);
+#endif
+}
+
+/* The format:
+
+           maintainer-errorid: [function-name:] message
+
+    where errorid is unique to the maintainer and function-name is
+    optional, is recommended, so that anyone can easily find the bug
+    with a simple grep for the short to type string
+    maintainer-errorid.  Don't bother with reusing errorids, there are
+    lots of numbers out there.
+
+    Example: 
+    
+    reiserfs_panic(
+	p_sb, "reiser-29: reiserfs_new_blocknrs: "
+	"one of search_start or rn(%d) is equal to MAX_B_NUM,"
+	"which means that we are optimizing location based on the bogus location of a temp buffer (%p).", 
+	rn, bh
+    );
+
+    Regular panic()s sometimes clear the screen before the message can
+    be read, thus the need for the while loop.  
+
+    Numbering scheme for panic used by Vladimir and Anatoly( Hans completely ignores this scheme, and considers it
+    pointless complexity):
+
+    panics in reiserfs_fs.h have numbers from 1000 to 1999
+    super.c				        2000 to 2999
+    preserve.c (unused)			    3000 to 3999
+    bitmap.c				    4000 to 4999
+    stree.c				        5000 to 5999
+    prints.c				    6000 to 6999
+    namei.c                     7000 to 7999
+    fix_nodes.c                 8000 to 8999
+    dir.c                       9000 to 9999
+	lbalance.c					10000 to 10999
+	ibalance.c		11000 to 11999 not ready
+	do_balan.c		12000 to 12999
+	inode.c			13000 to 13999
+	file.c			14000 to 14999
+    objectid.c                       15000 - 15999
+    buffer.c                         16000 - 16999
+    symlink.c                        17000 - 17999
+
+   .  */
+
+#ifdef CONFIG_REISERFS_CHECK
+extern struct tree_balance *cur_tb;
+#endif
+
+void reiserfs_panic(struct super_block *sb, const char *fmt, ...)
+{
+	do_reiserfs_warning(fmt);
+
+	dump_stack();
+
+	panic(KERN_EMERG "REISERFS: panic (device %s): %s\n",
+	       reiserfs_bdevname(sb), error_buf);
+}
+
+void reiserfs_abort(struct super_block *sb, int errno, const char *fmt, ...)
+{
+	do_reiserfs_warning(fmt);
+
+	if (reiserfs_error_panic(sb)) {
+		panic(KERN_CRIT "REISERFS: panic (device %s): %s\n",
+		      reiserfs_bdevname(sb), error_buf);
+	}
+
+	if (sb->s_flags & MS_RDONLY)
+		return;
+
+	printk(KERN_CRIT "REISERFS: abort (device %s): %s\n",
+	       reiserfs_bdevname(sb), error_buf);
+
+	sb->s_flags |= MS_RDONLY;
+	reiserfs_journal_abort(sb, errno);
+}
+
+/* this prints internal nodes (4 keys/items in line) (dc_number,
+   dc_size)[k_dirid, k_objectid, k_offset, k_uniqueness](dc_number,
+   dc_size)...*/
+static int print_internal(struct buffer_head *bh, int first, int last)
+{
+	struct reiserfs_key *key;
+	struct disk_child *dc;
+	int i;
+	int from, to;
+
+	if (!B_IS_KEYS_LEVEL(bh))
+		return 1;
+
+	check_internal(bh);
+
+	if (first == -1) {
+		from = 0;
+		to = B_NR_ITEMS(bh);
+	} else {
+		from = first;
+		to = last < B_NR_ITEMS(bh) ? last : B_NR_ITEMS(bh);
+	}
+
+	reiserfs_printk("INTERNAL NODE (%ld) contains %z\n", bh->b_blocknr, bh);
+
+	dc = B_N_CHILD(bh, from);
+	reiserfs_printk("PTR %d: %y ", from, dc);
+
+	for (i = from, key = B_N_PDELIM_KEY(bh, from), dc++; i < to;
+	     i++, key++, dc++) {
+		reiserfs_printk("KEY %d: %k PTR %d: %y ", i, key, i + 1, dc);
+		if (i && i % 4 == 0)
+			printk("\n");
+	}
+	printk("\n");
+	return 0;
+}
+
+static int print_leaf(struct buffer_head *bh, int print_mode, int first,
+		      int last)
+{
+	struct block_head *blkh;
+	struct item_head *ih;
+	int i, nr;
+	int from, to;
+
+	if (!B_IS_ITEMS_LEVEL(bh))
+		return 1;
+
+	check_leaf(bh);
+
+	blkh = B_BLK_HEAD(bh);
+	ih = B_N_PITEM_HEAD(bh, 0);
+	nr = blkh_nr_item(blkh);
+
+	printk
+	    ("\n===================================================================\n");
+	reiserfs_printk("LEAF NODE (%ld) contains %z\n", bh->b_blocknr, bh);
+
+	if (!(print_mode & PRINT_LEAF_ITEMS)) {
+		reiserfs_printk("FIRST ITEM_KEY: %k, LAST ITEM KEY: %k\n",
+				&(ih->ih_key), &((ih + nr - 1)->ih_key));
+		return 0;
+	}
+
+	if (first < 0 || first > nr - 1)
+		from = 0;
+	else
+		from = first;
+
+	if (last < 0 || last > nr)
+		to = nr;
+	else
+		to = last;
+
+	ih += from;
+	printk
+	    ("-------------------------------------------------------------------------------\n");
+	printk
+	    ("|##|   type    |           key           | ilen | free_space | version | loc  |\n");
+	for (i = from; i < to; i++, ih++) {
+		printk
+		    ("-------------------------------------------------------------------------------\n");
+		reiserfs_printk("|%2d| %h |\n", i, ih);
+		if (print_mode & PRINT_LEAF_ITEMS)
+			op_print_item(ih, B_I_PITEM(bh, ih));
+	}
+
+	printk
+	    ("===================================================================\n");
+
+	return 0;
+}
+
+char *reiserfs_hashname(int code)
+{
+	if (code == YURA_HASH)
+		return "rupasov";
+	if (code == TEA_HASH)
+		return "tea";
+	if (code == R5_HASH)
+		return "r5";
+
+	return "unknown";
+}
+
+/* return 1 if this is not super block */
+static int print_super_block(struct buffer_head *bh)
+{
+	struct reiserfs_super_block *rs =
+	    (struct reiserfs_super_block *)(bh->b_data);
+	int skipped, data_blocks;
+	char *version;
+	char b[BDEVNAME_SIZE];
+
+	if (is_reiserfs_3_5(rs)) {
+		version = "3.5";
+	} else if (is_reiserfs_3_6(rs)) {
+		version = "3.6";
+	} else if (is_reiserfs_jr(rs)) {
+		version = ((sb_version(rs) == REISERFS_VERSION_2) ?
+			   "3.6" : "3.5");
+	} else {
+		return 1;
+	}
+
+	printk("%s\'s super block is in block %llu\n", bdevname(bh->b_bdev, b),
+	       (unsigned long long)bh->b_blocknr);
+	printk("Reiserfs version %s\n", version);
+	printk("Block count %u\n", sb_block_count(rs));
+	printk("Blocksize %d\n", sb_blocksize(rs));
+	printk("Free blocks %u\n", sb_free_blocks(rs));
+	// FIXME: this would be confusing if
+	// someone stores reiserfs super block in some data block ;)
+//    skipped = (bh->b_blocknr * bh->b_size) / sb_blocksize(rs);
+	skipped = bh->b_blocknr;
+	data_blocks = sb_block_count(rs) - skipped - 1 - sb_bmap_nr(rs) -
+	    (!is_reiserfs_jr(rs) ? sb_jp_journal_size(rs) +
+	     1 : sb_reserved_for_journal(rs)) - sb_free_blocks(rs);
+	printk
+	    ("Busy blocks (skipped %d, bitmaps - %d, journal (or reserved) blocks - %d\n"
+	     "1 super block, %d data blocks\n", skipped, sb_bmap_nr(rs),
+	     (!is_reiserfs_jr(rs) ? (sb_jp_journal_size(rs) + 1) :
+	      sb_reserved_for_journal(rs)), data_blocks);
+	printk("Root block %u\n", sb_root_block(rs));
+	printk("Journal block (first) %d\n", sb_jp_journal_1st_block(rs));
+	printk("Journal dev %d\n", sb_jp_journal_dev(rs));
+	printk("Journal orig size %d\n", sb_jp_journal_size(rs));
+	printk("FS state %d\n", sb_fs_state(rs));
+	printk("Hash function \"%s\"\n",
+	       reiserfs_hashname(sb_hash_function_code(rs)));
+
+	printk("Tree height %d\n", sb_tree_height(rs));
+	return 0;
+}
+
+static int print_desc_block(struct buffer_head *bh)
+{
+	struct reiserfs_journal_desc *desc;
+
+	if (memcmp(get_journal_desc_magic(bh), JOURNAL_DESC_MAGIC, 8))
+		return 1;
+
+	desc = (struct reiserfs_journal_desc *)(bh->b_data);
+	printk("Desc block %llu (j_trans_id %d, j_mount_id %d, j_len %d)",
+	       (unsigned long long)bh->b_blocknr, get_desc_trans_id(desc),
+	       get_desc_mount_id(desc), get_desc_trans_len(desc));
+
+	return 0;
+}
+
+void print_block(struct buffer_head *bh, ...)	//int print_mode, int first, int last)
+{
+	va_list args;
+	int mode, first, last;
+
+	va_start(args, bh);
+
+	if (!bh) {
+		printk("print_block: buffer is NULL\n");
+		return;
+	}
+
+	mode = va_arg(args, int);
+	first = va_arg(args, int);
+	last = va_arg(args, int);
+	if (print_leaf(bh, mode, first, last))
+		if (print_internal(bh, first, last))
+			if (print_super_block(bh))
+				if (print_desc_block(bh))
+					printk
+					    ("Block %llu contains unformatted data\n",
+					     (unsigned long long)bh->b_blocknr);
+
+	va_end(args);
+}
+
+static char print_tb_buf[2048];
+
+/* this stores initial state of tree balance in the print_tb_buf */
+void store_print_tb(struct tree_balance *tb)
+{
+	int h = 0;
+	int i;
+	struct buffer_head *tbSh, *tbFh;
+
+	if (!tb)
+		return;
+
+	sprintf(print_tb_buf, "\n"
+		"BALANCING %d\n"
+		"MODE=%c, ITEM_POS=%d POS_IN_ITEM=%d\n"
+		"=====================================================================\n"
+		"* h *    S    *    L    *    R    *   F   *   FL  *   FR  *  CFL  *  CFR  *\n",
+		REISERFS_SB(tb->tb_sb)->s_do_balance,
+		tb->tb_mode, PATH_LAST_POSITION(tb->tb_path),
+		tb->tb_path->pos_in_item);
+
+	for (h = 0; h < ARRAY_SIZE(tb->insert_size); h++) {
+		if (PATH_H_PATH_OFFSET(tb->tb_path, h) <=
+		    tb->tb_path->path_length
+		    && PATH_H_PATH_OFFSET(tb->tb_path,
+					  h) > ILLEGAL_PATH_ELEMENT_OFFSET) {
+			tbSh = PATH_H_PBUFFER(tb->tb_path, h);
+			tbFh = PATH_H_PPARENT(tb->tb_path, h);
+		} else {
+			tbSh = NULL;
+			tbFh = NULL;
+		}
+		sprintf(print_tb_buf + strlen(print_tb_buf),
+			"* %d * %3lld(%2d) * %3lld(%2d) * %3lld(%2d) * %5lld * %5lld * %5lld * %5lld * %5lld *\n",
+			h,
+			(tbSh) ? (long long)(tbSh->b_blocknr) : (-1LL),
+			(tbSh) ? atomic_read(&(tbSh->b_count)) : -1,
+			(tb->L[h]) ? (long long)(tb->L[h]->b_blocknr) : (-1LL),
+			(tb->L[h]) ? atomic_read(&(tb->L[h]->b_count)) : -1,
+			(tb->R[h]) ? (long long)(tb->R[h]->b_blocknr) : (-1LL),
+			(tb->R[h]) ? atomic_read(&(tb->R[h]->b_count)) : -1,
+			(tbFh) ? (long long)(tbFh->b_blocknr) : (-1LL),
+			(tb->FL[h]) ? (long long)(tb->FL[h]->
+						  b_blocknr) : (-1LL),
+			(tb->FR[h]) ? (long long)(tb->FR[h]->
+						  b_blocknr) : (-1LL),
+			(tb->CFL[h]) ? (long long)(tb->CFL[h]->
+						   b_blocknr) : (-1LL),
+			(tb->CFR[h]) ? (long long)(tb->CFR[h]->
+						   b_blocknr) : (-1LL));
+	}
+
+	sprintf(print_tb_buf + strlen(print_tb_buf),
+		"=====================================================================\n"
+		"* h * size * ln * lb * rn * rb * blkn * s0 * s1 * s1b * s2 * s2b * curb * lk * rk *\n"
+		"* 0 * %4d * %2d * %2d * %2d * %2d * %4d * %2d * %2d * %3d * %2d * %3d * %4d * %2d * %2d *\n",
+		tb->insert_size[0], tb->lnum[0], tb->lbytes, tb->rnum[0],
+		tb->rbytes, tb->blknum[0], tb->s0num, tb->s1num, tb->s1bytes,
+		tb->s2num, tb->s2bytes, tb->cur_blknum, tb->lkey[0],
+		tb->rkey[0]);
+
+	/* this prints balance parameters for non-leaf levels */
+	h = 0;
+	do {
+		h++;
+		sprintf(print_tb_buf + strlen(print_tb_buf),
+			"* %d * %4d * %2d *    * %2d *    * %2d *\n",
+			h, tb->insert_size[h], tb->lnum[h], tb->rnum[h],
+			tb->blknum[h]);
+	} while (tb->insert_size[h]);
+
+	sprintf(print_tb_buf + strlen(print_tb_buf),
+		"=====================================================================\n"
+		"FEB list: ");
+
+	/* print FEB list (list of buffers in form (bh (b_blocknr, b_count), that will be used for new nodes) */
+	h = 0;
+	for (i = 0; i < ARRAY_SIZE(tb->FEB); i++)
+		sprintf(print_tb_buf + strlen(print_tb_buf),
+			"%p (%llu %d)%s", tb->FEB[i],
+			tb->FEB[i] ? (unsigned long long)tb->FEB[i]->
+			b_blocknr : 0ULL,
+			tb->FEB[i] ? atomic_read(&(tb->FEB[i]->b_count)) : 0,
+			(i == ARRAY_SIZE(tb->FEB) - 1) ? "\n" : ", ");
+
+	sprintf(print_tb_buf + strlen(print_tb_buf),
+		"======================== the end ====================================\n");
+}
+
+void print_cur_tb(char *mes)
+{
+	printk("%s\n%s", mes, print_tb_buf);
+}
+
+static void check_leaf_block_head(struct buffer_head *bh)
+{
+	struct block_head *blkh;
+	int nr;
+
+	blkh = B_BLK_HEAD(bh);
+	nr = blkh_nr_item(blkh);
+	if (nr > (bh->b_size - BLKH_SIZE) / IH_SIZE)
+		reiserfs_panic(NULL,
+			       "vs-6010: check_leaf_block_head: invalid item number %z",
+			       bh);
+	if (blkh_free_space(blkh) > bh->b_size - BLKH_SIZE - IH_SIZE * nr)
+		reiserfs_panic(NULL,
+			       "vs-6020: check_leaf_block_head: invalid free space %z",
+			       bh);
+
+}
+
+static void check_internal_block_head(struct buffer_head *bh)
+{
+	struct block_head *blkh;
+
+	blkh = B_BLK_HEAD(bh);
+	if (!(B_LEVEL(bh) > DISK_LEAF_NODE_LEVEL && B_LEVEL(bh) <= MAX_HEIGHT))
+		reiserfs_panic(NULL,
+			       "vs-6025: check_internal_block_head: invalid level %z",
+			       bh);
+
+	if (B_NR_ITEMS(bh) > (bh->b_size - BLKH_SIZE) / IH_SIZE)
+		reiserfs_panic(NULL,
+			       "vs-6030: check_internal_block_head: invalid item number %z",
+			       bh);
+
+	if (B_FREE_SPACE(bh) !=
+	    bh->b_size - BLKH_SIZE - KEY_SIZE * B_NR_ITEMS(bh) -
+	    DC_SIZE * (B_NR_ITEMS(bh) + 1))
+		reiserfs_panic(NULL,
+			       "vs-6040: check_internal_block_head: invalid free space %z",
+			       bh);
+
+}
+
+void check_leaf(struct buffer_head *bh)
+{
+	int i;
+	struct item_head *ih;
+
+	if (!bh)
+		return;
+	check_leaf_block_head(bh);
+	for (i = 0, ih = B_N_PITEM_HEAD(bh, 0); i < B_NR_ITEMS(bh); i++, ih++)
+		op_check_item(ih, B_I_PITEM(bh, ih));
+}
+
+void check_internal(struct buffer_head *bh)
+{
+	if (!bh)
+		return;
+	check_internal_block_head(bh);
+}
+
+void print_statistics(struct super_block *s)
+{
+
+	/*
+	   printk ("reiserfs_put_super: session statistics: balances %d, fix_nodes %d, \
+	   bmap with search %d, without %d, dir2ind %d, ind2dir %d\n",
+	   REISERFS_SB(s)->s_do_balance, REISERFS_SB(s)->s_fix_nodes,
+	   REISERFS_SB(s)->s_bmaps, REISERFS_SB(s)->s_bmaps_without_search,
+	   REISERFS_SB(s)->s_direct2indirect, REISERFS_SB(s)->s_indirect2direct);
+	 */
+
+}
diff --git a/fs/reiserfs/procfs.c b/fs/reiserfs/procfs.c
new file mode 100644
index 0000000..37173fa
--- /dev/null
+++ b/fs/reiserfs/procfs.c
@@ -0,0 +1,645 @@
+/* -*- linux-c -*- */
+
+/* fs/reiserfs/procfs.c */
+
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ */
+
+/* proc info support a la one created by Sizif@Botik.RU for PGC */
+
+#include <linux/module.h>
+#include <linux/time.h>
+#include <linux/seq_file.h>
+#include <asm/uaccess.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/reiserfs_fs_sb.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+
+#ifdef CONFIG_REISERFS_PROC_INFO
+
+/*
+ * LOCKING:
+ *
+ * We rely on new Alexander Viro's super-block locking.
+ *
+ */
+
+static int show_version(struct seq_file *m, struct super_block *sb)
+{
+	char *format;
+
+	if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_6)) {
+		format = "3.6";
+	} else if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_5)) {
+		format = "3.5";
+	} else {
+		format = "unknown";
+	}
+
+	seq_printf(m, "%s format\twith checks %s\n", format,
+#if defined( CONFIG_REISERFS_CHECK )
+		   "on"
+#else
+		   "off"
+#endif
+	    );
+	return 0;
+}
+
+int reiserfs_global_version_in_proc(char *buffer, char **start, off_t offset,
+				    int count, int *eof, void *data)
+{
+	*start = buffer;
+	*eof = 1;
+	return 0;
+}
+
+#define SF( x ) ( r -> x )
+#define SFP( x ) SF( s_proc_info_data.x )
+#define SFPL( x ) SFP( x[ level ] )
+#define SFPF( x ) SFP( scan_bitmap.x )
+#define SFPJ( x ) SFP( journal.x )
+
+#define D2C( x ) le16_to_cpu( x )
+#define D4C( x ) le32_to_cpu( x )
+#define DF( x ) D2C( rs -> s_v1.x )
+#define DFL( x ) D4C( rs -> s_v1.x )
+
+#define objectid_map( s, rs ) (old_format_only (s) ?				\
+                         (__le32 *)((struct reiserfs_super_block_v1 *)rs + 1) :	\
+			 (__le32 *)(rs + 1))
+#define MAP( i ) D4C( objectid_map( sb, rs )[ i ] )
+
+#define DJF( x ) le32_to_cpu( rs -> x )
+#define DJV( x ) le32_to_cpu( s_v1 -> x )
+#define DJP( x ) le32_to_cpu( jp -> x )
+#define JF( x ) ( r -> s_journal -> x )
+
+static int show_super(struct seq_file *m, struct super_block *sb)
+{
+	struct reiserfs_sb_info *r = REISERFS_SB(sb);
+
+	seq_printf(m, "state: \t%s\n"
+		   "mount options: \t%s%s%s%s%s%s%s%s%s%s%s\n"
+		   "gen. counter: \t%i\n"
+		   "s_disk_reads: \t%i\n"
+		   "s_disk_writes: \t%i\n"
+		   "s_fix_nodes: \t%i\n"
+		   "s_do_balance: \t%i\n"
+		   "s_unneeded_left_neighbor: \t%i\n"
+		   "s_good_search_by_key_reada: \t%i\n"
+		   "s_bmaps: \t%i\n"
+		   "s_bmaps_without_search: \t%i\n"
+		   "s_direct2indirect: \t%i\n"
+		   "s_indirect2direct: \t%i\n"
+		   "\n"
+		   "max_hash_collisions: \t%i\n"
+		   "breads: \t%lu\n"
+		   "bread_misses: \t%lu\n"
+		   "search_by_key: \t%lu\n"
+		   "search_by_key_fs_changed: \t%lu\n"
+		   "search_by_key_restarted: \t%lu\n"
+		   "insert_item_restarted: \t%lu\n"
+		   "paste_into_item_restarted: \t%lu\n"
+		   "cut_from_item_restarted: \t%lu\n"
+		   "delete_solid_item_restarted: \t%lu\n"
+		   "delete_item_restarted: \t%lu\n"
+		   "leaked_oid: \t%lu\n"
+		   "leaves_removable: \t%lu\n",
+		   SF(s_mount_state) == REISERFS_VALID_FS ?
+		   "REISERFS_VALID_FS" : "REISERFS_ERROR_FS",
+		   reiserfs_r5_hash(sb) ? "FORCE_R5 " : "",
+		   reiserfs_rupasov_hash(sb) ? "FORCE_RUPASOV " : "",
+		   reiserfs_tea_hash(sb) ? "FORCE_TEA " : "",
+		   reiserfs_hash_detect(sb) ? "DETECT_HASH " : "",
+		   reiserfs_no_border(sb) ? "NO_BORDER " : "BORDER ",
+		   reiserfs_no_unhashed_relocation(sb) ?
+		   "NO_UNHASHED_RELOCATION " : "",
+		   reiserfs_hashed_relocation(sb) ? "UNHASHED_RELOCATION " : "",
+		   reiserfs_test4(sb) ? "TEST4 " : "",
+		   have_large_tails(sb) ? "TAILS " : have_small_tails(sb) ?
+		   "SMALL_TAILS " : "NO_TAILS ",
+		   replay_only(sb) ? "REPLAY_ONLY " : "",
+		   convert_reiserfs(sb) ? "CONV " : "",
+		   atomic_read(&r->s_generation_counter),
+		   SF(s_disk_reads), SF(s_disk_writes), SF(s_fix_nodes),
+		   SF(s_do_balance), SF(s_unneeded_left_neighbor),
+		   SF(s_good_search_by_key_reada), SF(s_bmaps),
+		   SF(s_bmaps_without_search), SF(s_direct2indirect),
+		   SF(s_indirect2direct), SFP(max_hash_collisions), SFP(breads),
+		   SFP(bread_miss), SFP(search_by_key),
+		   SFP(search_by_key_fs_changed), SFP(search_by_key_restarted),
+		   SFP(insert_item_restarted), SFP(paste_into_item_restarted),
+		   SFP(cut_from_item_restarted),
+		   SFP(delete_solid_item_restarted), SFP(delete_item_restarted),
+		   SFP(leaked_oid), SFP(leaves_removable));
+
+	return 0;
+}
+
+static int show_per_level(struct seq_file *m, struct super_block *sb)
+{
+	struct reiserfs_sb_info *r = REISERFS_SB(sb);
+	int level;
+
+	seq_printf(m, "level\t"
+		   "     balances"
+		   " [sbk:  reads"
+		   "   fs_changed"
+		   "   restarted]"
+		   "   free space"
+		   "        items"
+		   "   can_remove"
+		   "         lnum"
+		   "         rnum"
+		   "       lbytes"
+		   "       rbytes"
+		   "     get_neig"
+		   " get_neig_res" "  need_l_neig" "  need_r_neig" "\n");
+
+	for (level = 0; level < MAX_HEIGHT; ++level) {
+		seq_printf(m, "%i\t"
+			   " %12lu"
+			   " %12lu"
+			   " %12lu"
+			   " %12lu"
+			   " %12lu"
+			   " %12lu"
+			   " %12lu"
+			   " %12li"
+			   " %12li"
+			   " %12li"
+			   " %12li"
+			   " %12lu"
+			   " %12lu"
+			   " %12lu"
+			   " %12lu"
+			   "\n",
+			   level,
+			   SFPL(balance_at),
+			   SFPL(sbk_read_at),
+			   SFPL(sbk_fs_changed),
+			   SFPL(sbk_restarted),
+			   SFPL(free_at),
+			   SFPL(items_at),
+			   SFPL(can_node_be_removed),
+			   SFPL(lnum),
+			   SFPL(rnum),
+			   SFPL(lbytes),
+			   SFPL(rbytes),
+			   SFPL(get_neighbors),
+			   SFPL(get_neighbors_restart),
+			   SFPL(need_l_neighbor), SFPL(need_r_neighbor)
+		    );
+	}
+	return 0;
+}
+
+static int show_bitmap(struct seq_file *m, struct super_block *sb)
+{
+	struct reiserfs_sb_info *r = REISERFS_SB(sb);
+
+	seq_printf(m, "free_block: %lu\n"
+		   "  scan_bitmap:"
+		   "          wait"
+		   "          bmap"
+		   "         retry"
+		   "        stolen"
+		   "  journal_hint"
+		   "journal_nohint"
+		   "\n"
+		   " %14lu"
+		   " %14lu"
+		   " %14lu"
+		   " %14lu"
+		   " %14lu"
+		   " %14lu"
+		   " %14lu"
+		   "\n",
+		   SFP(free_block),
+		   SFPF(call),
+		   SFPF(wait),
+		   SFPF(bmap),
+		   SFPF(retry),
+		   SFPF(stolen),
+		   SFPF(in_journal_hint), SFPF(in_journal_nohint));
+
+	return 0;
+}
+
+static int show_on_disk_super(struct seq_file *m, struct super_block *sb)
+{
+	struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
+	struct reiserfs_super_block *rs = sb_info->s_rs;
+	int hash_code = DFL(s_hash_function_code);
+	__u32 flags = DJF(s_flags);
+
+	seq_printf(m, "block_count: \t%i\n"
+		   "free_blocks: \t%i\n"
+		   "root_block: \t%i\n"
+		   "blocksize: \t%i\n"
+		   "oid_maxsize: \t%i\n"
+		   "oid_cursize: \t%i\n"
+		   "umount_state: \t%i\n"
+		   "magic: \t%10.10s\n"
+		   "fs_state: \t%i\n"
+		   "hash: \t%s\n"
+		   "tree_height: \t%i\n"
+		   "bmap_nr: \t%i\n"
+		   "version: \t%i\n"
+		   "flags: \t%x[%s]\n"
+		   "reserved_for_journal: \t%i\n",
+		   DFL(s_block_count),
+		   DFL(s_free_blocks),
+		   DFL(s_root_block),
+		   DF(s_blocksize),
+		   DF(s_oid_maxsize),
+		   DF(s_oid_cursize),
+		   DF(s_umount_state),
+		   rs->s_v1.s_magic,
+		   DF(s_fs_state),
+		   hash_code == TEA_HASH ? "tea" :
+		   (hash_code == YURA_HASH) ? "rupasov" :
+		   (hash_code == R5_HASH) ? "r5" :
+		   (hash_code == UNSET_HASH) ? "unset" : "unknown",
+		   DF(s_tree_height),
+		   DF(s_bmap_nr),
+		   DF(s_version), flags, (flags & reiserfs_attrs_cleared)
+		   ? "attrs_cleared" : "", DF(s_reserved_for_journal));
+
+	return 0;
+}
+
+static int show_oidmap(struct seq_file *m, struct super_block *sb)
+{
+	struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
+	struct reiserfs_super_block *rs = sb_info->s_rs;
+	unsigned int mapsize = le16_to_cpu(rs->s_v1.s_oid_cursize);
+	unsigned long total_used = 0;
+	int i;
+
+	for (i = 0; i < mapsize; ++i) {
+		__u32 right;
+
+		right = (i == mapsize - 1) ? MAX_KEY_OBJECTID : MAP(i + 1);
+		seq_printf(m, "%s: [ %x .. %x )\n",
+			   (i & 1) ? "free" : "used", MAP(i), right);
+		if (!(i & 1)) {
+			total_used += right - MAP(i);
+		}
+	}
+#if defined( REISERFS_USE_OIDMAPF )
+	if (sb_info->oidmap.use_file && (sb_info->oidmap.mapf != NULL)) {
+		loff_t size = sb_info->oidmap.mapf->f_path.dentry->d_inode->i_size;
+		total_used += size / sizeof(reiserfs_oidinterval_d_t);
+	}
+#endif
+	seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n",
+		   mapsize,
+		   mapsize, le16_to_cpu(rs->s_v1.s_oid_maxsize), total_used);
+	return 0;
+}
+
+static int show_journal(struct seq_file *m, struct super_block *sb)
+{
+	struct reiserfs_sb_info *r = REISERFS_SB(sb);
+	struct reiserfs_super_block *rs = r->s_rs;
+	struct journal_params *jp = &rs->s_v1.s_journal;
+	char b[BDEVNAME_SIZE];
+
+	seq_printf(m,		/* on-disk fields */
+		   "jp_journal_1st_block: \t%i\n"
+		   "jp_journal_dev: \t%s[%x]\n"
+		   "jp_journal_size: \t%i\n"
+		   "jp_journal_trans_max: \t%i\n"
+		   "jp_journal_magic: \t%i\n"
+		   "jp_journal_max_batch: \t%i\n"
+		   "jp_journal_max_commit_age: \t%i\n"
+		   "jp_journal_max_trans_age: \t%i\n"
+		   /* incore fields */
+		   "j_1st_reserved_block: \t%i\n"
+		   "j_state: \t%li\n"
+		   "j_trans_id: \t%lu\n"
+		   "j_mount_id: \t%lu\n"
+		   "j_start: \t%lu\n"
+		   "j_len: \t%lu\n"
+		   "j_len_alloc: \t%lu\n"
+		   "j_wcount: \t%i\n"
+		   "j_bcount: \t%lu\n"
+		   "j_first_unflushed_offset: \t%lu\n"
+		   "j_last_flush_trans_id: \t%lu\n"
+		   "j_trans_start_time: \t%li\n"
+		   "j_list_bitmap_index: \t%i\n"
+		   "j_must_wait: \t%i\n"
+		   "j_next_full_flush: \t%i\n"
+		   "j_next_async_flush: \t%i\n"
+		   "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n"
+		   /* reiserfs_proc_info_data_t.journal fields */
+		   "in_journal: \t%12lu\n"
+		   "in_journal_bitmap: \t%12lu\n"
+		   "in_journal_reusable: \t%12lu\n"
+		   "lock_journal: \t%12lu\n"
+		   "lock_journal_wait: \t%12lu\n"
+		   "journal_begin: \t%12lu\n"
+		   "journal_relock_writers: \t%12lu\n"
+		   "journal_relock_wcount: \t%12lu\n"
+		   "mark_dirty: \t%12lu\n"
+		   "mark_dirty_already: \t%12lu\n"
+		   "mark_dirty_notjournal: \t%12lu\n"
+		   "restore_prepared: \t%12lu\n"
+		   "prepare: \t%12lu\n"
+		   "prepare_retry: \t%12lu\n",
+		   DJP(jp_journal_1st_block),
+		   bdevname(SB_JOURNAL(sb)->j_dev_bd, b),
+		   DJP(jp_journal_dev),
+		   DJP(jp_journal_size),
+		   DJP(jp_journal_trans_max),
+		   DJP(jp_journal_magic),
+		   DJP(jp_journal_max_batch),
+		   SB_JOURNAL(sb)->j_max_commit_age,
+		   DJP(jp_journal_max_trans_age),
+		   JF(j_1st_reserved_block),
+		   JF(j_state),
+		   JF(j_trans_id),
+		   JF(j_mount_id),
+		   JF(j_start),
+		   JF(j_len),
+		   JF(j_len_alloc),
+		   atomic_read(&r->s_journal->j_wcount),
+		   JF(j_bcount),
+		   JF(j_first_unflushed_offset),
+		   JF(j_last_flush_trans_id),
+		   JF(j_trans_start_time),
+		   JF(j_list_bitmap_index),
+		   JF(j_must_wait),
+		   JF(j_next_full_flush),
+		   JF(j_next_async_flush),
+		   JF(j_cnode_used),
+		   JF(j_cnode_free),
+		   SFPJ(in_journal),
+		   SFPJ(in_journal_bitmap),
+		   SFPJ(in_journal_reusable),
+		   SFPJ(lock_journal),
+		   SFPJ(lock_journal_wait),
+		   SFPJ(journal_being),
+		   SFPJ(journal_relock_writers),
+		   SFPJ(journal_relock_wcount),
+		   SFPJ(mark_dirty),
+		   SFPJ(mark_dirty_already),
+		   SFPJ(mark_dirty_notjournal),
+		   SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry)
+	    );
+	return 0;
+}
+
+/* iterator */
+static int test_sb(struct super_block *sb, void *data)
+{
+	return data == sb;
+}
+
+static int set_sb(struct super_block *sb, void *data)
+{
+	return -ENOENT;
+}
+
+static void *r_start(struct seq_file *m, loff_t * pos)
+{
+	struct proc_dir_entry *de = m->private;
+	struct super_block *s = de->parent->data;
+	loff_t l = *pos;
+
+	if (l)
+		return NULL;
+
+	if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, s)))
+		return NULL;
+
+	up_write(&s->s_umount);
+	return s;
+}
+
+static void *r_next(struct seq_file *m, void *v, loff_t * pos)
+{
+	++*pos;
+	if (v)
+		deactivate_super(v);
+	return NULL;
+}
+
+static void r_stop(struct seq_file *m, void *v)
+{
+	if (v)
+		deactivate_super(v);
+}
+
+static int r_show(struct seq_file *m, void *v)
+{
+	struct proc_dir_entry *de = m->private;
+	int (*show) (struct seq_file *, struct super_block *) = de->data;
+	return show(m, v);
+}
+
+static const struct seq_operations r_ops = {
+	.start = r_start,
+	.next = r_next,
+	.stop = r_stop,
+	.show = r_show,
+};
+
+static int r_open(struct inode *inode, struct file *file)
+{
+	int ret = seq_open(file, &r_ops);
+
+	if (!ret) {
+		struct seq_file *m = file->private_data;
+		m->private = PDE(inode);
+	}
+	return ret;
+}
+
+static const struct file_operations r_file_operations = {
+	.open = r_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = seq_release,
+	.owner = THIS_MODULE,
+};
+
+static struct proc_dir_entry *proc_info_root = NULL;
+static const char proc_info_root_name[] = "fs/reiserfs";
+
+static void add_file(struct super_block *sb, char *name,
+		     int (*func) (struct seq_file *, struct super_block *))
+{
+	proc_create_data(name, 0, REISERFS_SB(sb)->procdir,
+			 &r_file_operations, func);
+}
+
+int reiserfs_proc_info_init(struct super_block *sb)
+{
+	char b[BDEVNAME_SIZE];
+	char *s;
+
+	/* Some block devices use /'s */
+	strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
+	s = strchr(b, '/');
+	if (s)
+		*s = '!';
+
+	spin_lock_init(&__PINFO(sb).lock);
+	REISERFS_SB(sb)->procdir = proc_mkdir(b, proc_info_root);
+	if (REISERFS_SB(sb)->procdir) {
+		REISERFS_SB(sb)->procdir->owner = THIS_MODULE;
+		REISERFS_SB(sb)->procdir->data = sb;
+		add_file(sb, "version", show_version);
+		add_file(sb, "super", show_super);
+		add_file(sb, "per-level", show_per_level);
+		add_file(sb, "bitmap", show_bitmap);
+		add_file(sb, "on-disk-super", show_on_disk_super);
+		add_file(sb, "oidmap", show_oidmap);
+		add_file(sb, "journal", show_journal);
+		return 0;
+	}
+	reiserfs_warning(sb, "reiserfs: cannot create /proc/%s/%s",
+			 proc_info_root_name, b);
+	return 1;
+}
+
+int reiserfs_proc_info_done(struct super_block *sb)
+{
+	struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;
+	char b[BDEVNAME_SIZE];
+	char *s;
+
+	/* Some block devices use /'s */
+	strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
+	s = strchr(b, '/');
+	if (s)
+		*s = '!';
+
+	if (de) {
+		remove_proc_entry("journal", de);
+		remove_proc_entry("oidmap", de);
+		remove_proc_entry("on-disk-super", de);
+		remove_proc_entry("bitmap", de);
+		remove_proc_entry("per-level", de);
+		remove_proc_entry("super", de);
+		remove_proc_entry("version", de);
+	}
+	spin_lock(&__PINFO(sb).lock);
+	__PINFO(sb).exiting = 1;
+	spin_unlock(&__PINFO(sb).lock);
+	if (proc_info_root) {
+		remove_proc_entry(b, proc_info_root);
+		REISERFS_SB(sb)->procdir = NULL;
+	}
+	return 0;
+}
+
+struct proc_dir_entry *reiserfs_proc_register_global(char *name,
+						     read_proc_t * func)
+{
+	return (proc_info_root) ? create_proc_read_entry(name, 0,
+							 proc_info_root,
+							 func, NULL) : NULL;
+}
+
+void reiserfs_proc_unregister_global(const char *name)
+{
+	remove_proc_entry(name, proc_info_root);
+}
+
+int reiserfs_proc_info_global_init(void)
+{
+	if (proc_info_root == NULL) {
+		proc_info_root = proc_mkdir(proc_info_root_name, NULL);
+		if (proc_info_root) {
+			proc_info_root->owner = THIS_MODULE;
+		} else {
+			reiserfs_warning(NULL,
+					 "reiserfs: cannot create /proc/%s",
+					 proc_info_root_name);
+			return 1;
+		}
+	}
+	return 0;
+}
+
+int reiserfs_proc_info_global_done(void)
+{
+	if (proc_info_root != NULL) {
+		proc_info_root = NULL;
+		remove_proc_entry(proc_info_root_name, NULL);
+	}
+	return 0;
+}
+
+/* REISERFS_PROC_INFO */
+#else
+
+int reiserfs_proc_info_init(struct super_block *sb)
+{
+	return 0;
+}
+int reiserfs_proc_info_done(struct super_block *sb)
+{
+	return 0;
+}
+
+struct proc_dir_entry *reiserfs_proc_register_global(char *name,
+						     read_proc_t * func)
+{
+	return NULL;
+}
+
+void reiserfs_proc_unregister_global(const char *name)
+{;
+}
+
+int reiserfs_proc_info_global_init(void)
+{
+	return 0;
+}
+int reiserfs_proc_info_global_done(void)
+{
+	return 0;
+}
+
+int reiserfs_global_version_in_proc(char *buffer, char **start,
+				    off_t offset,
+				    int count, int *eof, void *data)
+{
+	return 0;
+}
+
+/* REISERFS_PROC_INFO */
+#endif
+
+/*
+ * Revision 1.1.8.2  2001/07/15 17:08:42  god
+ *  . use get_super() in procfs.c
+ *  . remove remove_save_link() from reiserfs_do_truncate()
+ *
+ * I accept terms and conditions stated in the Legal Agreement
+ * (available at http://www.namesys.com/legalese.html)
+ *
+ * Revision 1.1.8.1  2001/07/11 16:48:50  god
+ * proc info support
+ *
+ * I accept terms and conditions stated in the Legal Agreement
+ * (available at http://www.namesys.com/legalese.html)
+ *
+ */
+
+/* 
+ * Make Linus happy.
+ * Local variables:
+ * c-indentation-style: "K&R"
+ * mode-name: "LC"
+ * c-basic-offset: 8
+ * tab-width: 8
+ * End:
+ */
diff --git a/fs/reiserfs/resize.c b/fs/reiserfs/resize.c
new file mode 100644
index 0000000..f71c394
--- /dev/null
+++ b/fs/reiserfs/resize.c
@@ -0,0 +1,211 @@
+/* 
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ */
+
+/* 
+ * Written by Alexander Zarochentcev.
+ *
+ * The kernel part of the (on-line) reiserfs resizer.
+ */
+
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/vmalloc.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/reiserfs_fs_sb.h>
+#include <linux/buffer_head.h>
+
+int reiserfs_resize(struct super_block *s, unsigned long block_count_new)
+{
+	int err = 0;
+	struct reiserfs_super_block *sb;
+	struct reiserfs_bitmap_info *bitmap;
+	struct reiserfs_bitmap_info *info;
+	struct reiserfs_bitmap_info *old_bitmap = SB_AP_BITMAP(s);
+	struct buffer_head *bh;
+	struct reiserfs_transaction_handle th;
+	unsigned int bmap_nr_new, bmap_nr;
+	unsigned int block_r_new, block_r;
+
+	struct reiserfs_list_bitmap *jb;
+	struct reiserfs_list_bitmap jbitmap[JOURNAL_NUM_BITMAPS];
+
+	unsigned long int block_count, free_blocks;
+	int i;
+	int copy_size;
+
+	sb = SB_DISK_SUPER_BLOCK(s);
+
+	if (SB_BLOCK_COUNT(s) >= block_count_new) {
+		printk("can\'t shrink filesystem on-line\n");
+		return -EINVAL;
+	}
+
+	/* check the device size */
+	bh = sb_bread(s, block_count_new - 1);
+	if (!bh) {
+		printk("reiserfs_resize: can\'t read last block\n");
+		return -EINVAL;
+	}
+	bforget(bh);
+
+	/* old disk layout detection; those partitions can be mounted, but
+	 * cannot be resized */
+	if (SB_BUFFER_WITH_SB(s)->b_blocknr * SB_BUFFER_WITH_SB(s)->b_size
+	    != REISERFS_DISK_OFFSET_IN_BYTES) {
+		printk
+		    ("reiserfs_resize: unable to resize a reiserfs without distributed bitmap (fs version < 3.5.12)\n");
+		return -ENOTSUPP;
+	}
+
+	/* count used bits in last bitmap block */
+	block_r = SB_BLOCK_COUNT(s) -
+			(reiserfs_bmap_count(s) - 1) * s->s_blocksize * 8;
+
+	/* count bitmap blocks in new fs */
+	bmap_nr_new = block_count_new / (s->s_blocksize * 8);
+	block_r_new = block_count_new - bmap_nr_new * s->s_blocksize * 8;
+	if (block_r_new)
+		bmap_nr_new++;
+	else
+		block_r_new = s->s_blocksize * 8;
+
+	/* save old values */
+	block_count = SB_BLOCK_COUNT(s);
+	bmap_nr = reiserfs_bmap_count(s);
+
+	/* resizing of reiserfs bitmaps (journal and real), if needed */
+	if (bmap_nr_new > bmap_nr) {
+		/* reallocate journal bitmaps */
+		if (reiserfs_allocate_list_bitmaps(s, jbitmap, bmap_nr_new) < 0) {
+			printk
+			    ("reiserfs_resize: unable to allocate memory for journal bitmaps\n");
+			unlock_super(s);
+			return -ENOMEM;
+		}
+		/* the new journal bitmaps are zero filled, now we copy in the bitmap
+		 ** node pointers from the old journal bitmap structs, and then
+		 ** transfer the new data structures into the journal struct.
+		 **
+		 ** using the copy_size var below allows this code to work for
+		 ** both shrinking and expanding the FS.
+		 */
+		copy_size = bmap_nr_new < bmap_nr ? bmap_nr_new : bmap_nr;
+		copy_size =
+		    copy_size * sizeof(struct reiserfs_list_bitmap_node *);
+		for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) {
+			struct reiserfs_bitmap_node **node_tmp;
+			jb = SB_JOURNAL(s)->j_list_bitmap + i;
+			memcpy(jbitmap[i].bitmaps, jb->bitmaps, copy_size);
+
+			/* just in case vfree schedules on us, copy the new
+			 ** pointer into the journal struct before freeing the 
+			 ** old one
+			 */
+			node_tmp = jb->bitmaps;
+			jb->bitmaps = jbitmap[i].bitmaps;
+			vfree(node_tmp);
+		}
+
+		/* allocate additional bitmap blocks, reallocate array of bitmap
+		 * block pointers */
+		bitmap =
+		    vmalloc(sizeof(struct reiserfs_bitmap_info) * bmap_nr_new);
+		if (!bitmap) {
+			/* Journal bitmaps are still supersized, but the memory isn't
+			 * leaked, so I guess it's ok */
+			printk("reiserfs_resize: unable to allocate memory.\n");
+			return -ENOMEM;
+		}
+		memset(bitmap, 0,
+		       sizeof(struct reiserfs_bitmap_info) * bmap_nr_new);
+		for (i = 0; i < bmap_nr; i++)
+			bitmap[i] = old_bitmap[i];
+
+		/* This doesn't go through the journal, but it doesn't have to.
+		 * The changes are still atomic: We're synced up when the journal
+		 * transaction begins, and the new bitmaps don't matter if the
+		 * transaction fails. */
+		for (i = bmap_nr; i < bmap_nr_new; i++) {
+			/* don't use read_bitmap_block since it will cache
+			 * the uninitialized bitmap */
+			bh = sb_bread(s, i * s->s_blocksize * 8);
+			if (!bh) {
+				vfree(bitmap);
+				return -EIO;
+			}
+			memset(bh->b_data, 0, sb_blocksize(sb));
+			reiserfs_test_and_set_le_bit(0, bh->b_data);
+			reiserfs_cache_bitmap_metadata(s, bh, bitmap + i);
+
+			set_buffer_uptodate(bh);
+			mark_buffer_dirty(bh);
+			sync_dirty_buffer(bh);
+			// update bitmap_info stuff
+			bitmap[i].free_count = sb_blocksize(sb) * 8 - 1;
+			brelse(bh);
+		}
+		/* free old bitmap blocks array */
+		SB_AP_BITMAP(s) = bitmap;
+		vfree(old_bitmap);
+	}
+
+	/* begin transaction, if there was an error, it's fine. Yes, we have
+	 * incorrect bitmaps now, but none of it is ever going to touch the
+	 * disk anyway. */
+	err = journal_begin(&th, s, 10);
+	if (err)
+		return err;
+
+	/* Extend old last bitmap block - new blocks have been made available */
+	info = SB_AP_BITMAP(s) + bmap_nr - 1;
+	bh = reiserfs_read_bitmap_block(s, bmap_nr - 1);
+	if (!bh) {
+		int jerr = journal_end(&th, s, 10);
+		if (jerr)
+			return jerr;
+		return -EIO;
+	}
+
+	reiserfs_prepare_for_journal(s, bh, 1);
+	for (i = block_r; i < s->s_blocksize * 8; i++)
+		reiserfs_test_and_clear_le_bit(i, bh->b_data);
+	info->free_count += s->s_blocksize * 8 - block_r;
+
+	journal_mark_dirty(&th, s, bh);
+	brelse(bh);
+
+	/* Correct new last bitmap block - It may not be full */
+	info = SB_AP_BITMAP(s) + bmap_nr_new - 1;
+	bh = reiserfs_read_bitmap_block(s, bmap_nr_new - 1);
+	if (!bh) {
+		int jerr = journal_end(&th, s, 10);
+		if (jerr)
+			return jerr;
+		return -EIO;
+	}
+
+	reiserfs_prepare_for_journal(s, bh, 1);
+	for (i = block_r_new; i < s->s_blocksize * 8; i++)
+		reiserfs_test_and_set_le_bit(i, bh->b_data);
+	journal_mark_dirty(&th, s, bh);
+	brelse(bh);
+
+	info->free_count -= s->s_blocksize * 8 - block_r_new;
+	/* update super */
+	reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
+	free_blocks = SB_FREE_BLOCKS(s);
+	PUT_SB_FREE_BLOCKS(s,
+			   free_blocks + (block_count_new - block_count -
+					  (bmap_nr_new - bmap_nr)));
+	PUT_SB_BLOCK_COUNT(s, block_count_new);
+	PUT_SB_BMAP_NR(s, bmap_would_wrap(bmap_nr_new) ? : bmap_nr_new);
+	s->s_dirt = 1;
+
+	journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
+
+	SB_JOURNAL(s)->j_must_wait = 1;
+	return journal_end(&th, s, 10);
+}
diff --git a/fs/reiserfs/stree.c b/fs/reiserfs/stree.c
new file mode 100644
index 0000000..abbc64d
--- /dev/null
+++ b/fs/reiserfs/stree.c
@@ -0,0 +1,2117 @@
+/*
+ *  Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ */
+
+/*
+ *  Written by Anatoly P. Pinchuk pap@namesys.botik.ru
+ *  Programm System Institute
+ *  Pereslavl-Zalessky Russia
+ */
+
+/*
+ *  This file contains functions dealing with S+tree
+ *
+ * B_IS_IN_TREE
+ * copy_item_head
+ * comp_short_keys
+ * comp_keys
+ * comp_short_le_keys
+ * le_key2cpu_key
+ * comp_le_keys
+ * bin_search
+ * get_lkey
+ * get_rkey
+ * key_in_buffer
+ * decrement_bcount
+ * decrement_counters_in_path
+ * reiserfs_check_path
+ * pathrelse_and_restore
+ * pathrelse
+ * search_by_key_reada
+ * search_by_key
+ * search_for_position_by_key
+ * comp_items
+ * prepare_for_direct_item
+ * prepare_for_direntry_item
+ * prepare_for_delete_or_cut
+ * calc_deleted_bytes_number
+ * init_tb_struct
+ * padd_item
+ * reiserfs_delete_item
+ * reiserfs_delete_solid_item
+ * reiserfs_delete_object
+ * maybe_indirect_to_direct
+ * indirect_to_direct_roll_back
+ * reiserfs_cut_from_item
+ * truncate_directory
+ * reiserfs_do_truncate
+ * reiserfs_paste_into_item
+ * reiserfs_insert_item
+ */
+
+#include <linux/time.h>
+#include <linux/string.h>
+#include <linux/pagemap.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/buffer_head.h>
+#include <linux/quotaops.h>
+
+/* Does the buffer contain a disk block which is in the tree. */
+inline int B_IS_IN_TREE(const struct buffer_head *p_s_bh)
+{
+
+	RFALSE(B_LEVEL(p_s_bh) > MAX_HEIGHT,
+	       "PAP-1010: block (%b) has too big level (%z)", p_s_bh, p_s_bh);
+
+	return (B_LEVEL(p_s_bh) != FREE_LEVEL);
+}
+
+//
+// to gets item head in le form
+//
+inline void copy_item_head(struct item_head *p_v_to,
+			   const struct item_head *p_v_from)
+{
+	memcpy(p_v_to, p_v_from, IH_SIZE);
+}
+
+/* k1 is pointer to on-disk structure which is stored in little-endian
+   form. k2 is pointer to cpu variable. For key of items of the same
+   object this returns 0.
+   Returns: -1 if key1 < key2 
+   0 if key1 == key2
+   1 if key1 > key2 */
+inline int comp_short_keys(const struct reiserfs_key *le_key,
+			   const struct cpu_key *cpu_key)
+{
+	__u32 n;
+	n = le32_to_cpu(le_key->k_dir_id);
+	if (n < cpu_key->on_disk_key.k_dir_id)
+		return -1;
+	if (n > cpu_key->on_disk_key.k_dir_id)
+		return 1;
+	n = le32_to_cpu(le_key->k_objectid);
+	if (n < cpu_key->on_disk_key.k_objectid)
+		return -1;
+	if (n > cpu_key->on_disk_key.k_objectid)
+		return 1;
+	return 0;
+}
+
+/* k1 is pointer to on-disk structure which is stored in little-endian
+   form. k2 is pointer to cpu variable.
+   Compare keys using all 4 key fields.
+   Returns: -1 if key1 < key2 0
+   if key1 = key2 1 if key1 > key2 */
+static inline int comp_keys(const struct reiserfs_key *le_key,
+			    const struct cpu_key *cpu_key)
+{
+	int retval;
+
+	retval = comp_short_keys(le_key, cpu_key);
+	if (retval)
+		return retval;
+	if (le_key_k_offset(le_key_version(le_key), le_key) <
+	    cpu_key_k_offset(cpu_key))
+		return -1;
+	if (le_key_k_offset(le_key_version(le_key), le_key) >
+	    cpu_key_k_offset(cpu_key))
+		return 1;
+
+	if (cpu_key->key_length == 3)
+		return 0;
+
+	/* this part is needed only when tail conversion is in progress */
+	if (le_key_k_type(le_key_version(le_key), le_key) <
+	    cpu_key_k_type(cpu_key))
+		return -1;
+
+	if (le_key_k_type(le_key_version(le_key), le_key) >
+	    cpu_key_k_type(cpu_key))
+		return 1;
+
+	return 0;
+}
+
+inline int comp_short_le_keys(const struct reiserfs_key *key1,
+			      const struct reiserfs_key *key2)
+{
+	__u32 *p_s_1_u32, *p_s_2_u32;
+	int n_key_length = REISERFS_SHORT_KEY_LEN;
+
+	p_s_1_u32 = (__u32 *) key1;
+	p_s_2_u32 = (__u32 *) key2;
+	for (; n_key_length--; ++p_s_1_u32, ++p_s_2_u32) {
+		if (le32_to_cpu(*p_s_1_u32) < le32_to_cpu(*p_s_2_u32))
+			return -1;
+		if (le32_to_cpu(*p_s_1_u32) > le32_to_cpu(*p_s_2_u32))
+			return 1;
+	}
+	return 0;
+}
+
+inline void le_key2cpu_key(struct cpu_key *to, const struct reiserfs_key *from)
+{
+	int version;
+	to->on_disk_key.k_dir_id = le32_to_cpu(from->k_dir_id);
+	to->on_disk_key.k_objectid = le32_to_cpu(from->k_objectid);
+
+	// find out version of the key
+	version = le_key_version(from);
+	to->version = version;
+	to->on_disk_key.k_offset = le_key_k_offset(version, from);
+	to->on_disk_key.k_type = le_key_k_type(version, from);
+}
+
+// this does not say which one is bigger, it only returns 1 if keys
+// are not equal, 0 otherwise
+inline int comp_le_keys(const struct reiserfs_key *k1,
+			const struct reiserfs_key *k2)
+{
+	return memcmp(k1, k2, sizeof(struct reiserfs_key));
+}
+
+/**************************************************************************
+ *  Binary search toolkit function                                        *
+ *  Search for an item in the array by the item key                       *
+ *  Returns:    1 if found,  0 if not found;                              *
+ *        *p_n_pos = number of the searched element if found, else the    *
+ *        number of the first element that is larger than p_v_key.        *
+ **************************************************************************/
+/* For those not familiar with binary search: n_lbound is the leftmost item that it
+ could be, n_rbound the rightmost item that it could be.  We examine the item
+ halfway between n_lbound and n_rbound, and that tells us either that we can increase
+ n_lbound, or decrease n_rbound, or that we have found it, or if n_lbound <= n_rbound that
+ there are no possible items, and we have not found it. With each examination we
+ cut the number of possible items it could be by one more than half rounded down,
+ or we find it. */
+static inline int bin_search(const void *p_v_key,	/* Key to search for.                   */
+			     const void *p_v_base,	/* First item in the array.             */
+			     int p_n_num,	/* Number of items in the array.        */
+			     int p_n_width,	/* Item size in the array.
+						   searched. Lest the reader be
+						   confused, note that this is crafted
+						   as a general function, and when it
+						   is applied specifically to the array
+						   of item headers in a node, p_n_width
+						   is actually the item header size not
+						   the item size.                      */
+			     int *p_n_pos	/* Number of the searched for element. */
+    )
+{
+	int n_rbound, n_lbound, n_j;
+
+	for (n_j = ((n_rbound = p_n_num - 1) + (n_lbound = 0)) / 2;
+	     n_lbound <= n_rbound; n_j = (n_rbound + n_lbound) / 2)
+		switch (comp_keys
+			((struct reiserfs_key *)((char *)p_v_base +
+						 n_j * p_n_width),
+			 (struct cpu_key *)p_v_key)) {
+		case -1:
+			n_lbound = n_j + 1;
+			continue;
+		case 1:
+			n_rbound = n_j - 1;
+			continue;
+		case 0:
+			*p_n_pos = n_j;
+			return ITEM_FOUND;	/* Key found in the array.  */
+		}
+
+	/* bin_search did not find given key, it returns position of key,
+	   that is minimal and greater than the given one. */
+	*p_n_pos = n_lbound;
+	return ITEM_NOT_FOUND;
+}
+
+#ifdef CONFIG_REISERFS_CHECK
+extern struct tree_balance *cur_tb;
+#endif
+
+/* Minimal possible key. It is never in the tree. */
+const struct reiserfs_key MIN_KEY = { 0, 0, {{0, 0},} };
+
+/* Maximal possible key. It is never in the tree. */
+static const struct reiserfs_key MAX_KEY = {
+	__constant_cpu_to_le32(0xffffffff),
+	__constant_cpu_to_le32(0xffffffff),
+	{{__constant_cpu_to_le32(0xffffffff),
+	  __constant_cpu_to_le32(0xffffffff)},}
+};
+
+/* Get delimiting key of the buffer by looking for it in the buffers in the path, starting from the bottom
+   of the path, and going upwards.  We must check the path's validity at each step.  If the key is not in
+   the path, there is no delimiting key in the tree (buffer is first or last buffer in tree), and in this
+   case we return a special key, either MIN_KEY or MAX_KEY. */
+static inline const struct reiserfs_key *get_lkey(const struct treepath
+						  *p_s_chk_path,
+						  const struct super_block
+						  *p_s_sb)
+{
+	int n_position, n_path_offset = p_s_chk_path->path_length;
+	struct buffer_head *p_s_parent;
+
+	RFALSE(n_path_offset < FIRST_PATH_ELEMENT_OFFSET,
+	       "PAP-5010: invalid offset in the path");
+
+	/* While not higher in path than first element. */
+	while (n_path_offset-- > FIRST_PATH_ELEMENT_OFFSET) {
+
+		RFALSE(!buffer_uptodate
+		       (PATH_OFFSET_PBUFFER(p_s_chk_path, n_path_offset)),
+		       "PAP-5020: parent is not uptodate");
+
+		/* Parent at the path is not in the tree now. */
+		if (!B_IS_IN_TREE
+		    (p_s_parent =
+		     PATH_OFFSET_PBUFFER(p_s_chk_path, n_path_offset)))
+			return &MAX_KEY;
+		/* Check whether position in the parent is correct. */
+		if ((n_position =
+		     PATH_OFFSET_POSITION(p_s_chk_path,
+					  n_path_offset)) >
+		    B_NR_ITEMS(p_s_parent))
+			return &MAX_KEY;
+		/* Check whether parent at the path really points to the child. */
+		if (B_N_CHILD_NUM(p_s_parent, n_position) !=
+		    PATH_OFFSET_PBUFFER(p_s_chk_path,
+					n_path_offset + 1)->b_blocknr)
+			return &MAX_KEY;
+		/* Return delimiting key if position in the parent is not equal to zero. */
+		if (n_position)
+			return B_N_PDELIM_KEY(p_s_parent, n_position - 1);
+	}
+	/* Return MIN_KEY if we are in the root of the buffer tree. */
+	if (PATH_OFFSET_PBUFFER(p_s_chk_path, FIRST_PATH_ELEMENT_OFFSET)->
+	    b_blocknr == SB_ROOT_BLOCK(p_s_sb))
+		return &MIN_KEY;
+	return &MAX_KEY;
+}
+
+/* Get delimiting key of the buffer at the path and its right neighbor. */
+inline const struct reiserfs_key *get_rkey(const struct treepath *p_s_chk_path,
+					   const struct super_block *p_s_sb)
+{
+	int n_position, n_path_offset = p_s_chk_path->path_length;
+	struct buffer_head *p_s_parent;
+
+	RFALSE(n_path_offset < FIRST_PATH_ELEMENT_OFFSET,
+	       "PAP-5030: invalid offset in the path");
+
+	while (n_path_offset-- > FIRST_PATH_ELEMENT_OFFSET) {
+
+		RFALSE(!buffer_uptodate
+		       (PATH_OFFSET_PBUFFER(p_s_chk_path, n_path_offset)),
+		       "PAP-5040: parent is not uptodate");
+
+		/* Parent at the path is not in the tree now. */
+		if (!B_IS_IN_TREE
+		    (p_s_parent =
+		     PATH_OFFSET_PBUFFER(p_s_chk_path, n_path_offset)))
+			return &MIN_KEY;
+		/* Check whether position in the parent is correct. */
+		if ((n_position =
+		     PATH_OFFSET_POSITION(p_s_chk_path,
+					  n_path_offset)) >
+		    B_NR_ITEMS(p_s_parent))
+			return &MIN_KEY;
+		/* Check whether parent at the path really points to the child. */
+		if (B_N_CHILD_NUM(p_s_parent, n_position) !=
+		    PATH_OFFSET_PBUFFER(p_s_chk_path,
+					n_path_offset + 1)->b_blocknr)
+			return &MIN_KEY;
+		/* Return delimiting key if position in the parent is not the last one. */
+		if (n_position != B_NR_ITEMS(p_s_parent))
+			return B_N_PDELIM_KEY(p_s_parent, n_position);
+	}
+	/* Return MAX_KEY if we are in the root of the buffer tree. */
+	if (PATH_OFFSET_PBUFFER(p_s_chk_path, FIRST_PATH_ELEMENT_OFFSET)->
+	    b_blocknr == SB_ROOT_BLOCK(p_s_sb))
+		return &MAX_KEY;
+	return &MIN_KEY;
+}
+
+/* Check whether a key is contained in the tree rooted from a buffer at a path. */
+/* This works by looking at the left and right delimiting keys for the buffer in the last path_element in
+   the path.  These delimiting keys are stored at least one level above that buffer in the tree. If the
+   buffer is the first or last node in the tree order then one of the delimiting keys may be absent, and in
+   this case get_lkey and get_rkey return a special key which is MIN_KEY or MAX_KEY. */
+static inline int key_in_buffer(struct treepath *p_s_chk_path,	/* Path which should be checked.  */
+				const struct cpu_key *p_s_key,	/* Key which should be checked.   */
+				struct super_block *p_s_sb	/* Super block pointer.           */
+    )
+{
+
+	RFALSE(!p_s_key || p_s_chk_path->path_length < FIRST_PATH_ELEMENT_OFFSET
+	       || p_s_chk_path->path_length > MAX_HEIGHT,
+	       "PAP-5050: pointer to the key(%p) is NULL or invalid path length(%d)",
+	       p_s_key, p_s_chk_path->path_length);
+	RFALSE(!PATH_PLAST_BUFFER(p_s_chk_path)->b_bdev,
+	       "PAP-5060: device must not be NODEV");
+
+	if (comp_keys(get_lkey(p_s_chk_path, p_s_sb), p_s_key) == 1)
+		/* left delimiting key is bigger, that the key we look for */
+		return 0;
+	//  if ( comp_keys(p_s_key, get_rkey(p_s_chk_path, p_s_sb)) != -1 )
+	if (comp_keys(get_rkey(p_s_chk_path, p_s_sb), p_s_key) != 1)
+		/* p_s_key must be less than right delimitiing key */
+		return 0;
+	return 1;
+}
+
+inline void decrement_bcount(struct buffer_head *p_s_bh)
+{
+	if (p_s_bh) {
+		if (atomic_read(&(p_s_bh->b_count))) {
+			put_bh(p_s_bh);
+			return;
+		}
+		reiserfs_panic(NULL,
+			       "PAP-5070: decrement_bcount: trying to free free buffer %b",
+			       p_s_bh);
+	}
+}
+
+/* Decrement b_count field of the all buffers in the path. */
+void decrement_counters_in_path(struct treepath *p_s_search_path)
+{
+	int n_path_offset = p_s_search_path->path_length;
+
+	RFALSE(n_path_offset < ILLEGAL_PATH_ELEMENT_OFFSET ||
+	       n_path_offset > EXTENDED_MAX_HEIGHT - 1,
+	       "PAP-5080: invalid path offset of %d", n_path_offset);
+
+	while (n_path_offset > ILLEGAL_PATH_ELEMENT_OFFSET) {
+		struct buffer_head *bh;
+
+		bh = PATH_OFFSET_PBUFFER(p_s_search_path, n_path_offset--);
+		decrement_bcount(bh);
+	}
+	p_s_search_path->path_length = ILLEGAL_PATH_ELEMENT_OFFSET;
+}
+
+int reiserfs_check_path(struct treepath *p)
+{
+	RFALSE(p->path_length != ILLEGAL_PATH_ELEMENT_OFFSET,
+	       "path not properly relsed");
+	return 0;
+}
+
+/* Release all buffers in the path. Restore dirty bits clean
+** when preparing the buffer for the log
+**
+** only called from fix_nodes()
+*/
+void pathrelse_and_restore(struct super_block *s, struct treepath *p_s_search_path)
+{
+	int n_path_offset = p_s_search_path->path_length;
+
+	RFALSE(n_path_offset < ILLEGAL_PATH_ELEMENT_OFFSET,
+	       "clm-4000: invalid path offset");
+
+	while (n_path_offset > ILLEGAL_PATH_ELEMENT_OFFSET) {
+		reiserfs_restore_prepared_buffer(s,
+						 PATH_OFFSET_PBUFFER
+						 (p_s_search_path,
+						  n_path_offset));
+		brelse(PATH_OFFSET_PBUFFER(p_s_search_path, n_path_offset--));
+	}
+	p_s_search_path->path_length = ILLEGAL_PATH_ELEMENT_OFFSET;
+}
+
+/* Release all buffers in the path. */
+void pathrelse(struct treepath *p_s_search_path)
+{
+	int n_path_offset = p_s_search_path->path_length;
+
+	RFALSE(n_path_offset < ILLEGAL_PATH_ELEMENT_OFFSET,
+	       "PAP-5090: invalid path offset");
+
+	while (n_path_offset > ILLEGAL_PATH_ELEMENT_OFFSET)
+		brelse(PATH_OFFSET_PBUFFER(p_s_search_path, n_path_offset--));
+
+	p_s_search_path->path_length = ILLEGAL_PATH_ELEMENT_OFFSET;
+}
+
+static int is_leaf(char *buf, int blocksize, struct buffer_head *bh)
+{
+	struct block_head *blkh;
+	struct item_head *ih;
+	int used_space;
+	int prev_location;
+	int i;
+	int nr;
+
+	blkh = (struct block_head *)buf;
+	if (blkh_level(blkh) != DISK_LEAF_NODE_LEVEL) {
+		reiserfs_warning(NULL,
+				 "is_leaf: this should be caught earlier");
+		return 0;
+	}
+
+	nr = blkh_nr_item(blkh);
+	if (nr < 1 || nr > ((blocksize - BLKH_SIZE) / (IH_SIZE + MIN_ITEM_LEN))) {
+		/* item number is too big or too small */
+		reiserfs_warning(NULL, "is_leaf: nr_item seems wrong: %z", bh);
+		return 0;
+	}
+	ih = (struct item_head *)(buf + BLKH_SIZE) + nr - 1;
+	used_space = BLKH_SIZE + IH_SIZE * nr + (blocksize - ih_location(ih));
+	if (used_space != blocksize - blkh_free_space(blkh)) {
+		/* free space does not match to calculated amount of use space */
+		reiserfs_warning(NULL, "is_leaf: free space seems wrong: %z",
+				 bh);
+		return 0;
+	}
+	// FIXME: it is_leaf will hit performance too much - we may have
+	// return 1 here
+
+	/* check tables of item heads */
+	ih = (struct item_head *)(buf + BLKH_SIZE);
+	prev_location = blocksize;
+	for (i = 0; i < nr; i++, ih++) {
+		if (le_ih_k_type(ih) == TYPE_ANY) {
+			reiserfs_warning(NULL,
+					 "is_leaf: wrong item type for item %h",
+					 ih);
+			return 0;
+		}
+		if (ih_location(ih) >= blocksize
+		    || ih_location(ih) < IH_SIZE * nr) {
+			reiserfs_warning(NULL,
+					 "is_leaf: item location seems wrong: %h",
+					 ih);
+			return 0;
+		}
+		if (ih_item_len(ih) < 1
+		    || ih_item_len(ih) > MAX_ITEM_LEN(blocksize)) {
+			reiserfs_warning(NULL,
+					 "is_leaf: item length seems wrong: %h",
+					 ih);
+			return 0;
+		}
+		if (prev_location - ih_location(ih) != ih_item_len(ih)) {
+			reiserfs_warning(NULL,
+					 "is_leaf: item location seems wrong (second one): %h",
+					 ih);
+			return 0;
+		}
+		prev_location = ih_location(ih);
+	}
+
+	// one may imagine much more checks
+	return 1;
+}
+
+/* returns 1 if buf looks like an internal node, 0 otherwise */
+static int is_internal(char *buf, int blocksize, struct buffer_head *bh)
+{
+	struct block_head *blkh;
+	int nr;
+	int used_space;
+
+	blkh = (struct block_head *)buf;
+	nr = blkh_level(blkh);
+	if (nr <= DISK_LEAF_NODE_LEVEL || nr > MAX_HEIGHT) {
+		/* this level is not possible for internal nodes */
+		reiserfs_warning(NULL,
+				 "is_internal: this should be caught earlier");
+		return 0;
+	}
+
+	nr = blkh_nr_item(blkh);
+	if (nr > (blocksize - BLKH_SIZE - DC_SIZE) / (KEY_SIZE + DC_SIZE)) {
+		/* for internal which is not root we might check min number of keys */
+		reiserfs_warning(NULL,
+				 "is_internal: number of key seems wrong: %z",
+				 bh);
+		return 0;
+	}
+
+	used_space = BLKH_SIZE + KEY_SIZE * nr + DC_SIZE * (nr + 1);
+	if (used_space != blocksize - blkh_free_space(blkh)) {
+		reiserfs_warning(NULL,
+				 "is_internal: free space seems wrong: %z", bh);
+		return 0;
+	}
+	// one may imagine much more checks
+	return 1;
+}
+
+// make sure that bh contains formatted node of reiserfs tree of
+// 'level'-th level
+static int is_tree_node(struct buffer_head *bh, int level)
+{
+	if (B_LEVEL(bh) != level) {
+		reiserfs_warning(NULL,
+				 "is_tree_node: node level %d does not match to the expected one %d",
+				 B_LEVEL(bh), level);
+		return 0;
+	}
+	if (level == DISK_LEAF_NODE_LEVEL)
+		return is_leaf(bh->b_data, bh->b_size, bh);
+
+	return is_internal(bh->b_data, bh->b_size, bh);
+}
+
+#define SEARCH_BY_KEY_READA 16
+
+/* The function is NOT SCHEDULE-SAFE! */
+static void search_by_key_reada(struct super_block *s,
+				struct buffer_head **bh,
+				b_blocknr_t *b, int num)
+{
+	int i, j;
+
+	for (i = 0; i < num; i++) {
+		bh[i] = sb_getblk(s, b[i]);
+	}
+	for (j = 0; j < i; j++) {
+		/*
+		 * note, this needs attention if we are getting rid of the BKL
+		 * you have to make sure the prepared bit isn't set on this buffer
+		 */
+		if (!buffer_uptodate(bh[j]))
+			ll_rw_block(READA, 1, bh + j);
+		brelse(bh[j]);
+	}
+}
+
+/**************************************************************************
+ * Algorithm   SearchByKey                                                *
+ *             look for item in the Disk S+Tree by its key                *
+ * Input:  p_s_sb   -  super block                                        *
+ *         p_s_key  - pointer to the key to search                        *
+ * Output: ITEM_FOUND, ITEM_NOT_FOUND or IO_ERROR                         *
+ *         p_s_search_path - path from the root to the needed leaf        *
+ **************************************************************************/
+
+/* This function fills up the path from the root to the leaf as it
+   descends the tree looking for the key.  It uses reiserfs_bread to
+   try to find buffers in the cache given their block number.  If it
+   does not find them in the cache it reads them from disk.  For each
+   node search_by_key finds using reiserfs_bread it then uses
+   bin_search to look through that node.  bin_search will find the
+   position of the block_number of the next node if it is looking
+   through an internal node.  If it is looking through a leaf node
+   bin_search will find the position of the item which has key either
+   equal to given key, or which is the maximal key less than the given
+   key.  search_by_key returns a path that must be checked for the
+   correctness of the top of the path but need not be checked for the
+   correctness of the bottom of the path */
+/* The function is NOT SCHEDULE-SAFE! */
+int search_by_key(struct super_block *p_s_sb, const struct cpu_key *p_s_key,	/* Key to search. */
+		  struct treepath *p_s_search_path,/* This structure was
+						   allocated and initialized
+						   by the calling
+						   function. It is filled up
+						   by this function.  */
+		  int n_stop_level	/* How far down the tree to search. To
+					   stop at leaf level - set to
+					   DISK_LEAF_NODE_LEVEL */
+    )
+{
+	b_blocknr_t n_block_number;
+	int expected_level;
+	struct buffer_head *p_s_bh;
+	struct path_element *p_s_last_element;
+	int n_node_level, n_retval;
+	int right_neighbor_of_leaf_node;
+	int fs_gen;
+	struct buffer_head *reada_bh[SEARCH_BY_KEY_READA];
+	b_blocknr_t reada_blocks[SEARCH_BY_KEY_READA];
+	int reada_count = 0;
+
+#ifdef CONFIG_REISERFS_CHECK
+	int n_repeat_counter = 0;
+#endif
+
+	PROC_INFO_INC(p_s_sb, search_by_key);
+
+	/* As we add each node to a path we increase its count.  This means that
+	   we must be careful to release all nodes in a path before we either
+	   discard the path struct or re-use the path struct, as we do here. */
+
+	decrement_counters_in_path(p_s_search_path);
+
+	right_neighbor_of_leaf_node = 0;
+
+	/* With each iteration of this loop we search through the items in the
+	   current node, and calculate the next current node(next path element)
+	   for the next iteration of this loop.. */
+	n_block_number = SB_ROOT_BLOCK(p_s_sb);
+	expected_level = -1;
+	while (1) {
+
+#ifdef CONFIG_REISERFS_CHECK
+		if (!(++n_repeat_counter % 50000))
+			reiserfs_warning(p_s_sb, "PAP-5100: search_by_key: %s:"
+					 "there were %d iterations of while loop "
+					 "looking for key %K",
+					 current->comm, n_repeat_counter,
+					 p_s_key);
+#endif
+
+		/* prep path to have another element added to it. */
+		p_s_last_element =
+		    PATH_OFFSET_PELEMENT(p_s_search_path,
+					 ++p_s_search_path->path_length);
+		fs_gen = get_generation(p_s_sb);
+
+		/* Read the next tree node, and set the last element in the path to
+		   have a pointer to it. */
+		if ((p_s_bh = p_s_last_element->pe_buffer =
+		     sb_getblk(p_s_sb, n_block_number))) {
+			if (!buffer_uptodate(p_s_bh) && reada_count > 1) {
+				search_by_key_reada(p_s_sb, reada_bh,
+						    reada_blocks, reada_count);
+			}
+			ll_rw_block(READ, 1, &p_s_bh);
+			wait_on_buffer(p_s_bh);
+			if (!buffer_uptodate(p_s_bh))
+				goto io_error;
+		} else {
+		      io_error:
+			p_s_search_path->path_length--;
+			pathrelse(p_s_search_path);
+			return IO_ERROR;
+		}
+		reada_count = 0;
+		if (expected_level == -1)
+			expected_level = SB_TREE_HEIGHT(p_s_sb);
+		expected_level--;
+
+		/* It is possible that schedule occurred. We must check whether the key
+		   to search is still in the tree rooted from the current buffer. If
+		   not then repeat search from the root. */
+		if (fs_changed(fs_gen, p_s_sb) &&
+		    (!B_IS_IN_TREE(p_s_bh) ||
+		     B_LEVEL(p_s_bh) != expected_level ||
+		     !key_in_buffer(p_s_search_path, p_s_key, p_s_sb))) {
+			PROC_INFO_INC(p_s_sb, search_by_key_fs_changed);
+			PROC_INFO_INC(p_s_sb, search_by_key_restarted);
+			PROC_INFO_INC(p_s_sb,
+				      sbk_restarted[expected_level - 1]);
+			decrement_counters_in_path(p_s_search_path);
+
+			/* Get the root block number so that we can repeat the search
+			   starting from the root. */
+			n_block_number = SB_ROOT_BLOCK(p_s_sb);
+			expected_level = -1;
+			right_neighbor_of_leaf_node = 0;
+
+			/* repeat search from the root */
+			continue;
+		}
+
+		/* only check that the key is in the buffer if p_s_key is not
+		   equal to the MAX_KEY. Latter case is only possible in
+		   "finish_unfinished()" processing during mount. */
+		RFALSE(comp_keys(&MAX_KEY, p_s_key) &&
+		       !key_in_buffer(p_s_search_path, p_s_key, p_s_sb),
+		       "PAP-5130: key is not in the buffer");
+#ifdef CONFIG_REISERFS_CHECK
+		if (cur_tb) {
+			print_cur_tb("5140");
+			reiserfs_panic(p_s_sb,
+				       "PAP-5140: search_by_key: schedule occurred in do_balance!");
+		}
+#endif
+
+		// make sure, that the node contents look like a node of
+		// certain level
+		if (!is_tree_node(p_s_bh, expected_level)) {
+			reiserfs_warning(p_s_sb, "vs-5150: search_by_key: "
+					 "invalid format found in block %ld. Fsck?",
+					 p_s_bh->b_blocknr);
+			pathrelse(p_s_search_path);
+			return IO_ERROR;
+		}
+
+		/* ok, we have acquired next formatted node in the tree */
+		n_node_level = B_LEVEL(p_s_bh);
+
+		PROC_INFO_BH_STAT(p_s_sb, p_s_bh, n_node_level - 1);
+
+		RFALSE(n_node_level < n_stop_level,
+		       "vs-5152: tree level (%d) is less than stop level (%d)",
+		       n_node_level, n_stop_level);
+
+		n_retval = bin_search(p_s_key, B_N_PITEM_HEAD(p_s_bh, 0),
+				      B_NR_ITEMS(p_s_bh),
+				      (n_node_level ==
+				       DISK_LEAF_NODE_LEVEL) ? IH_SIZE :
+				      KEY_SIZE,
+				      &(p_s_last_element->pe_position));
+		if (n_node_level == n_stop_level) {
+			return n_retval;
+		}
+
+		/* we are not in the stop level */
+		if (n_retval == ITEM_FOUND)
+			/* item has been found, so we choose the pointer which is to the right of the found one */
+			p_s_last_element->pe_position++;
+
+		/* if item was not found we choose the position which is to
+		   the left of the found item. This requires no code,
+		   bin_search did it already. */
+
+		/* So we have chosen a position in the current node which is
+		   an internal node.  Now we calculate child block number by
+		   position in the node. */
+		n_block_number =
+		    B_N_CHILD_NUM(p_s_bh, p_s_last_element->pe_position);
+
+		/* if we are going to read leaf nodes, try for read ahead as well */
+		if ((p_s_search_path->reada & PATH_READA) &&
+		    n_node_level == DISK_LEAF_NODE_LEVEL + 1) {
+			int pos = p_s_last_element->pe_position;
+			int limit = B_NR_ITEMS(p_s_bh);
+			struct reiserfs_key *le_key;
+
+			if (p_s_search_path->reada & PATH_READA_BACK)
+				limit = 0;
+			while (reada_count < SEARCH_BY_KEY_READA) {
+				if (pos == limit)
+					break;
+				reada_blocks[reada_count++] =
+				    B_N_CHILD_NUM(p_s_bh, pos);
+				if (p_s_search_path->reada & PATH_READA_BACK)
+					pos--;
+				else
+					pos++;
+
+				/*
+				 * check to make sure we're in the same object
+				 */
+				le_key = B_N_PDELIM_KEY(p_s_bh, pos);
+				if (le32_to_cpu(le_key->k_objectid) !=
+				    p_s_key->on_disk_key.k_objectid) {
+					break;
+				}
+			}
+		}
+	}
+}
+
+/* Form the path to an item and position in this item which contains
+   file byte defined by p_s_key. If there is no such item
+   corresponding to the key, we point the path to the item with
+   maximal key less than p_s_key, and *p_n_pos_in_item is set to one
+   past the last entry/byte in the item.  If searching for entry in a
+   directory item, and it is not found, *p_n_pos_in_item is set to one
+   entry more than the entry with maximal key which is less than the
+   sought key.
+
+   Note that if there is no entry in this same node which is one more,
+   then we point to an imaginary entry.  for direct items, the
+   position is in units of bytes, for indirect items the position is
+   in units of blocknr entries, for directory items the position is in
+   units of directory entries.  */
+
+/* The function is NOT SCHEDULE-SAFE! */
+int search_for_position_by_key(struct super_block *p_s_sb,	/* Pointer to the super block.          */
+			       const struct cpu_key *p_cpu_key,	/* Key to search (cpu variable)         */
+			       struct treepath *p_s_search_path	/* Filled up by this function.          */
+    )
+{
+	struct item_head *p_le_ih;	/* pointer to on-disk structure */
+	int n_blk_size;
+	loff_t item_offset, offset;
+	struct reiserfs_dir_entry de;
+	int retval;
+
+	/* If searching for directory entry. */
+	if (is_direntry_cpu_key(p_cpu_key))
+		return search_by_entry_key(p_s_sb, p_cpu_key, p_s_search_path,
+					   &de);
+
+	/* If not searching for directory entry. */
+
+	/* If item is found. */
+	retval = search_item(p_s_sb, p_cpu_key, p_s_search_path);
+	if (retval == IO_ERROR)
+		return retval;
+	if (retval == ITEM_FOUND) {
+
+		RFALSE(!ih_item_len
+		       (B_N_PITEM_HEAD
+			(PATH_PLAST_BUFFER(p_s_search_path),
+			 PATH_LAST_POSITION(p_s_search_path))),
+		       "PAP-5165: item length equals zero");
+
+		pos_in_item(p_s_search_path) = 0;
+		return POSITION_FOUND;
+	}
+
+	RFALSE(!PATH_LAST_POSITION(p_s_search_path),
+	       "PAP-5170: position equals zero");
+
+	/* Item is not found. Set path to the previous item. */
+	p_le_ih =
+	    B_N_PITEM_HEAD(PATH_PLAST_BUFFER(p_s_search_path),
+			   --PATH_LAST_POSITION(p_s_search_path));
+	n_blk_size = p_s_sb->s_blocksize;
+
+	if (comp_short_keys(&(p_le_ih->ih_key), p_cpu_key)) {
+		return FILE_NOT_FOUND;
+	}
+	// FIXME: quite ugly this far
+
+	item_offset = le_ih_k_offset(p_le_ih);
+	offset = cpu_key_k_offset(p_cpu_key);
+
+	/* Needed byte is contained in the item pointed to by the path. */
+	if (item_offset <= offset &&
+	    item_offset + op_bytes_number(p_le_ih, n_blk_size) > offset) {
+		pos_in_item(p_s_search_path) = offset - item_offset;
+		if (is_indirect_le_ih(p_le_ih)) {
+			pos_in_item(p_s_search_path) /= n_blk_size;
+		}
+		return POSITION_FOUND;
+	}
+
+	/* Needed byte is not contained in the item pointed to by the
+	   path. Set pos_in_item out of the item. */
+	if (is_indirect_le_ih(p_le_ih))
+		pos_in_item(p_s_search_path) =
+		    ih_item_len(p_le_ih) / UNFM_P_SIZE;
+	else
+		pos_in_item(p_s_search_path) = ih_item_len(p_le_ih);
+
+	return POSITION_NOT_FOUND;
+}
+
+/* Compare given item and item pointed to by the path. */
+int comp_items(const struct item_head *stored_ih, const struct treepath *p_s_path)
+{
+	struct buffer_head *p_s_bh;
+	struct item_head *ih;
+
+	/* Last buffer at the path is not in the tree. */
+	if (!B_IS_IN_TREE(p_s_bh = PATH_PLAST_BUFFER(p_s_path)))
+		return 1;
+
+	/* Last path position is invalid. */
+	if (PATH_LAST_POSITION(p_s_path) >= B_NR_ITEMS(p_s_bh))
+		return 1;
+
+	/* we need only to know, whether it is the same item */
+	ih = get_ih(p_s_path);
+	return memcmp(stored_ih, ih, IH_SIZE);
+}
+
+/* unformatted nodes are not logged anymore, ever.  This is safe
+** now
+*/
+#define held_by_others(bh) (atomic_read(&(bh)->b_count) > 1)
+
+// block can not be forgotten as it is in I/O or held by someone
+#define block_in_use(bh) (buffer_locked(bh) || (held_by_others(bh)))
+
+// prepare for delete or cut of direct item
+static inline int prepare_for_direct_item(struct treepath *path,
+					  struct item_head *le_ih,
+					  struct inode *inode,
+					  loff_t new_file_length, int *cut_size)
+{
+	loff_t round_len;
+
+	if (new_file_length == max_reiserfs_offset(inode)) {
+		/* item has to be deleted */
+		*cut_size = -(IH_SIZE + ih_item_len(le_ih));
+		return M_DELETE;
+	}
+	// new file gets truncated
+	if (get_inode_item_key_version(inode) == KEY_FORMAT_3_6) {
+		// 
+		round_len = ROUND_UP(new_file_length);
+		/* this was n_new_file_length < le_ih ... */
+		if (round_len < le_ih_k_offset(le_ih)) {
+			*cut_size = -(IH_SIZE + ih_item_len(le_ih));
+			return M_DELETE;	/* Delete this item. */
+		}
+		/* Calculate first position and size for cutting from item. */
+		pos_in_item(path) = round_len - (le_ih_k_offset(le_ih) - 1);
+		*cut_size = -(ih_item_len(le_ih) - pos_in_item(path));
+
+		return M_CUT;	/* Cut from this item. */
+	}
+
+	// old file: items may have any length
+
+	if (new_file_length < le_ih_k_offset(le_ih)) {
+		*cut_size = -(IH_SIZE + ih_item_len(le_ih));
+		return M_DELETE;	/* Delete this item. */
+	}
+	/* Calculate first position and size for cutting from item. */
+	*cut_size = -(ih_item_len(le_ih) -
+		      (pos_in_item(path) =
+		       new_file_length + 1 - le_ih_k_offset(le_ih)));
+	return M_CUT;		/* Cut from this item. */
+}
+
+static inline int prepare_for_direntry_item(struct treepath *path,
+					    struct item_head *le_ih,
+					    struct inode *inode,
+					    loff_t new_file_length,
+					    int *cut_size)
+{
+	if (le_ih_k_offset(le_ih) == DOT_OFFSET &&
+	    new_file_length == max_reiserfs_offset(inode)) {
+		RFALSE(ih_entry_count(le_ih) != 2,
+		       "PAP-5220: incorrect empty directory item (%h)", le_ih);
+		*cut_size = -(IH_SIZE + ih_item_len(le_ih));
+		return M_DELETE;	/* Delete the directory item containing "." and ".." entry. */
+	}
+
+	if (ih_entry_count(le_ih) == 1) {
+		/* Delete the directory item such as there is one record only
+		   in this item */
+		*cut_size = -(IH_SIZE + ih_item_len(le_ih));
+		return M_DELETE;
+	}
+
+	/* Cut one record from the directory item. */
+	*cut_size =
+	    -(DEH_SIZE +
+	      entry_length(get_last_bh(path), le_ih, pos_in_item(path)));
+	return M_CUT;
+}
+
+#define JOURNAL_FOR_FREE_BLOCK_AND_UPDATE_SD (2 * JOURNAL_PER_BALANCE_CNT + 1)
+
+/*  If the path points to a directory or direct item, calculate mode and the size cut, for balance.
+    If the path points to an indirect item, remove some number of its unformatted nodes.
+    In case of file truncate calculate whether this item must be deleted/truncated or last
+    unformatted node of this item will be converted to a direct item.
+    This function returns a determination of what balance mode the calling function should employ. */
+static char prepare_for_delete_or_cut(struct reiserfs_transaction_handle *th, struct inode *inode, struct treepath *p_s_path, const struct cpu_key *p_s_item_key, int *p_n_removed,	/* Number of unformatted nodes which were removed
+																						   from end of the file. */
+				      int *p_n_cut_size, unsigned long long n_new_file_length	/* MAX_KEY_OFFSET in case of delete. */
+    )
+{
+	struct super_block *p_s_sb = inode->i_sb;
+	struct item_head *p_le_ih = PATH_PITEM_HEAD(p_s_path);
+	struct buffer_head *p_s_bh = PATH_PLAST_BUFFER(p_s_path);
+
+	BUG_ON(!th->t_trans_id);
+
+	/* Stat_data item. */
+	if (is_statdata_le_ih(p_le_ih)) {
+
+		RFALSE(n_new_file_length != max_reiserfs_offset(inode),
+		       "PAP-5210: mode must be M_DELETE");
+
+		*p_n_cut_size = -(IH_SIZE + ih_item_len(p_le_ih));
+		return M_DELETE;
+	}
+
+	/* Directory item. */
+	if (is_direntry_le_ih(p_le_ih))
+		return prepare_for_direntry_item(p_s_path, p_le_ih, inode,
+						 n_new_file_length,
+						 p_n_cut_size);
+
+	/* Direct item. */
+	if (is_direct_le_ih(p_le_ih))
+		return prepare_for_direct_item(p_s_path, p_le_ih, inode,
+					       n_new_file_length, p_n_cut_size);
+
+	/* Case of an indirect item. */
+	{
+	    int blk_size = p_s_sb->s_blocksize;
+	    struct item_head s_ih;
+	    int need_re_search;
+	    int delete = 0;
+	    int result = M_CUT;
+	    int pos = 0;
+
+	    if ( n_new_file_length == max_reiserfs_offset (inode) ) {
+		/* prepare_for_delete_or_cut() is called by
+		 * reiserfs_delete_item() */
+		n_new_file_length = 0;
+		delete = 1;
+	    }
+
+	    do {
+		need_re_search = 0;
+		*p_n_cut_size = 0;
+		p_s_bh = PATH_PLAST_BUFFER(p_s_path);
+		copy_item_head(&s_ih, PATH_PITEM_HEAD(p_s_path));
+		pos = I_UNFM_NUM(&s_ih);
+
+		while (le_ih_k_offset (&s_ih) + (pos - 1) * blk_size > n_new_file_length) {
+		    __le32 *unfm;
+		    __u32 block;
+
+		    /* Each unformatted block deletion may involve one additional
+		     * bitmap block into the transaction, thereby the initial
+		     * journal space reservation might not be enough. */
+		    if (!delete && (*p_n_cut_size) != 0 &&
+			reiserfs_transaction_free_space(th) < JOURNAL_FOR_FREE_BLOCK_AND_UPDATE_SD) {
+			break;
+		    }
+
+		    unfm = (__le32 *)B_I_PITEM(p_s_bh, &s_ih) + pos - 1;
+		    block = get_block_num(unfm, 0);
+
+		    if (block != 0) {
+			reiserfs_prepare_for_journal(p_s_sb, p_s_bh, 1);
+			put_block_num(unfm, 0, 0);
+			journal_mark_dirty (th, p_s_sb, p_s_bh);
+			reiserfs_free_block(th, inode, block, 1);
+		    }
+
+		    cond_resched();
+
+		    if (item_moved (&s_ih, p_s_path))  {
+			need_re_search = 1;
+			break;
+		    }
+
+		    pos --;
+		    (*p_n_removed) ++;
+		    (*p_n_cut_size) -= UNFM_P_SIZE;
+
+		    if (pos == 0) {
+			(*p_n_cut_size) -= IH_SIZE;
+			result = M_DELETE;
+			break;
+		    }
+		}
+		/* a trick.  If the buffer has been logged, this will do nothing.  If
+		** we've broken the loop without logging it, it will restore the
+		** buffer */
+		reiserfs_restore_prepared_buffer(p_s_sb, p_s_bh);
+	    } while (need_re_search &&
+		     search_for_position_by_key(p_s_sb, p_s_item_key, p_s_path) == POSITION_FOUND);
+	    pos_in_item(p_s_path) = pos * UNFM_P_SIZE;
+
+	    if (*p_n_cut_size == 0) {
+		/* Nothing were cut. maybe convert last unformatted node to the
+		 * direct item? */
+		result = M_CONVERT;
+	    }
+	    return result;
+	}
+}
+
+/* Calculate number of bytes which will be deleted or cut during balance */
+static int calc_deleted_bytes_number(struct tree_balance *p_s_tb, char c_mode)
+{
+	int n_del_size;
+	struct item_head *p_le_ih = PATH_PITEM_HEAD(p_s_tb->tb_path);
+
+	if (is_statdata_le_ih(p_le_ih))
+		return 0;
+
+	n_del_size =
+	    (c_mode ==
+	     M_DELETE) ? ih_item_len(p_le_ih) : -p_s_tb->insert_size[0];
+	if (is_direntry_le_ih(p_le_ih)) {
+		// return EMPTY_DIR_SIZE; /* We delete emty directoris only. */
+		// we can't use EMPTY_DIR_SIZE, as old format dirs have a different
+		// empty size.  ick. FIXME, is this right?
+		//
+		return n_del_size;
+	}
+
+	if (is_indirect_le_ih(p_le_ih))
+		n_del_size = (n_del_size / UNFM_P_SIZE) * (PATH_PLAST_BUFFER(p_s_tb->tb_path)->b_size);	// - get_ih_free_space (p_le_ih);
+	return n_del_size;
+}
+
+static void init_tb_struct(struct reiserfs_transaction_handle *th,
+			   struct tree_balance *p_s_tb,
+			   struct super_block *p_s_sb,
+			   struct treepath *p_s_path, int n_size)
+{
+
+	BUG_ON(!th->t_trans_id);
+
+	memset(p_s_tb, '\0', sizeof(struct tree_balance));
+	p_s_tb->transaction_handle = th;
+	p_s_tb->tb_sb = p_s_sb;
+	p_s_tb->tb_path = p_s_path;
+	PATH_OFFSET_PBUFFER(p_s_path, ILLEGAL_PATH_ELEMENT_OFFSET) = NULL;
+	PATH_OFFSET_POSITION(p_s_path, ILLEGAL_PATH_ELEMENT_OFFSET) = 0;
+	p_s_tb->insert_size[0] = n_size;
+}
+
+void padd_item(char *item, int total_length, int length)
+{
+	int i;
+
+	for (i = total_length; i > length;)
+		item[--i] = 0;
+}
+
+#ifdef REISERQUOTA_DEBUG
+char key2type(struct reiserfs_key *ih)
+{
+	if (is_direntry_le_key(2, ih))
+		return 'd';
+	if (is_direct_le_key(2, ih))
+		return 'D';
+	if (is_indirect_le_key(2, ih))
+		return 'i';
+	if (is_statdata_le_key(2, ih))
+		return 's';
+	return 'u';
+}
+
+char head2type(struct item_head *ih)
+{
+	if (is_direntry_le_ih(ih))
+		return 'd';
+	if (is_direct_le_ih(ih))
+		return 'D';
+	if (is_indirect_le_ih(ih))
+		return 'i';
+	if (is_statdata_le_ih(ih))
+		return 's';
+	return 'u';
+}
+#endif
+
+/* Delete object item. */
+int reiserfs_delete_item(struct reiserfs_transaction_handle *th, struct treepath *p_s_path,	/* Path to the deleted item. */
+			 const struct cpu_key *p_s_item_key,	/* Key to search for the deleted item.  */
+			 struct inode *p_s_inode,	/* inode is here just to update i_blocks and quotas */
+			 struct buffer_head *p_s_un_bh)
+{				/* NULL or unformatted node pointer.    */
+	struct super_block *p_s_sb = p_s_inode->i_sb;
+	struct tree_balance s_del_balance;
+	struct item_head s_ih;
+	struct item_head *q_ih;
+	int quota_cut_bytes;
+	int n_ret_value, n_del_size, n_removed;
+
+#ifdef CONFIG_REISERFS_CHECK
+	char c_mode;
+	int n_iter = 0;
+#endif
+
+	BUG_ON(!th->t_trans_id);
+
+	init_tb_struct(th, &s_del_balance, p_s_sb, p_s_path,
+		       0 /*size is unknown */ );
+
+	while (1) {
+		n_removed = 0;
+
+#ifdef CONFIG_REISERFS_CHECK
+		n_iter++;
+		c_mode =
+#endif
+		    prepare_for_delete_or_cut(th, p_s_inode, p_s_path,
+					      p_s_item_key, &n_removed,
+					      &n_del_size,
+					      max_reiserfs_offset(p_s_inode));
+
+		RFALSE(c_mode != M_DELETE, "PAP-5320: mode must be M_DELETE");
+
+		copy_item_head(&s_ih, PATH_PITEM_HEAD(p_s_path));
+		s_del_balance.insert_size[0] = n_del_size;
+
+		n_ret_value = fix_nodes(M_DELETE, &s_del_balance, NULL, NULL);
+		if (n_ret_value != REPEAT_SEARCH)
+			break;
+
+		PROC_INFO_INC(p_s_sb, delete_item_restarted);
+
+		// file system changed, repeat search
+		n_ret_value =
+		    search_for_position_by_key(p_s_sb, p_s_item_key, p_s_path);
+		if (n_ret_value == IO_ERROR)
+			break;
+		if (n_ret_value == FILE_NOT_FOUND) {
+			reiserfs_warning(p_s_sb,
+					 "vs-5340: reiserfs_delete_item: "
+					 "no items of the file %K found",
+					 p_s_item_key);
+			break;
+		}
+	}			/* while (1) */
+
+	if (n_ret_value != CARRY_ON) {
+		unfix_nodes(&s_del_balance);
+		return 0;
+	}
+	// reiserfs_delete_item returns item length when success
+	n_ret_value = calc_deleted_bytes_number(&s_del_balance, M_DELETE);
+	q_ih = get_ih(p_s_path);
+	quota_cut_bytes = ih_item_len(q_ih);
+
+	/* hack so the quota code doesn't have to guess if the file
+	 ** has a tail.  On tail insert, we allocate quota for 1 unformatted node.
+	 ** We test the offset because the tail might have been
+	 ** split into multiple items, and we only want to decrement for
+	 ** the unfm node once
+	 */
+	if (!S_ISLNK(p_s_inode->i_mode) && is_direct_le_ih(q_ih)) {
+		if ((le_ih_k_offset(q_ih) & (p_s_sb->s_blocksize - 1)) == 1) {
+			quota_cut_bytes = p_s_sb->s_blocksize + UNFM_P_SIZE;
+		} else {
+			quota_cut_bytes = 0;
+		}
+	}
+
+	if (p_s_un_bh) {
+		int off;
+		char *data;
+
+		/* We are in direct2indirect conversion, so move tail contents
+		   to the unformatted node */
+		/* note, we do the copy before preparing the buffer because we
+		 ** don't care about the contents of the unformatted node yet.
+		 ** the only thing we really care about is the direct item's data
+		 ** is in the unformatted node.
+		 **
+		 ** Otherwise, we would have to call reiserfs_prepare_for_journal on
+		 ** the unformatted node, which might schedule, meaning we'd have to
+		 ** loop all the way back up to the start of the while loop.
+		 **
+		 ** The unformatted node must be dirtied later on.  We can't be
+		 ** sure here if the entire tail has been deleted yet.
+		 **
+		 ** p_s_un_bh is from the page cache (all unformatted nodes are
+		 ** from the page cache) and might be a highmem page.  So, we
+		 ** can't use p_s_un_bh->b_data.
+		 ** -clm
+		 */
+
+		data = kmap_atomic(p_s_un_bh->b_page, KM_USER0);
+		off = ((le_ih_k_offset(&s_ih) - 1) & (PAGE_CACHE_SIZE - 1));
+		memcpy(data + off,
+		       B_I_PITEM(PATH_PLAST_BUFFER(p_s_path), &s_ih),
+		       n_ret_value);
+		kunmap_atomic(data, KM_USER0);
+	}
+	/* Perform balancing after all resources have been collected at once. */
+	do_balance(&s_del_balance, NULL, NULL, M_DELETE);
+
+#ifdef REISERQUOTA_DEBUG
+	reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE,
+		       "reiserquota delete_item(): freeing %u, id=%u type=%c",
+		       quota_cut_bytes, p_s_inode->i_uid, head2type(&s_ih));
+#endif
+	DQUOT_FREE_SPACE_NODIRTY(p_s_inode, quota_cut_bytes);
+
+	/* Return deleted body length */
+	return n_ret_value;
+}
+
+/* Summary Of Mechanisms For Handling Collisions Between Processes:
+
+ deletion of the body of the object is performed by iput(), with the
+ result that if multiple processes are operating on a file, the
+ deletion of the body of the file is deferred until the last process
+ that has an open inode performs its iput().
+
+ writes and truncates are protected from collisions by use of
+ semaphores.
+
+ creates, linking, and mknod are protected from collisions with other
+ processes by making the reiserfs_add_entry() the last step in the
+ creation, and then rolling back all changes if there was a collision.
+ - Hans
+*/
+
+/* this deletes item which never gets split */
+void reiserfs_delete_solid_item(struct reiserfs_transaction_handle *th,
+				struct inode *inode, struct reiserfs_key *key)
+{
+	struct tree_balance tb;
+	INITIALIZE_PATH(path);
+	int item_len = 0;
+	int tb_init = 0;
+	struct cpu_key cpu_key;
+	int retval;
+	int quota_cut_bytes = 0;
+
+	BUG_ON(!th->t_trans_id);
+
+	le_key2cpu_key(&cpu_key, key);
+
+	while (1) {
+		retval = search_item(th->t_super, &cpu_key, &path);
+		if (retval == IO_ERROR) {
+			reiserfs_warning(th->t_super,
+					 "vs-5350: reiserfs_delete_solid_item: "
+					 "i/o failure occurred trying to delete %K",
+					 &cpu_key);
+			break;
+		}
+		if (retval != ITEM_FOUND) {
+			pathrelse(&path);
+			// No need for a warning, if there is just no free space to insert '..' item into the newly-created subdir
+			if (!
+			    ((unsigned long long)
+			     GET_HASH_VALUE(le_key_k_offset
+					    (le_key_version(key), key)) == 0
+			     && (unsigned long long)
+			     GET_GENERATION_NUMBER(le_key_k_offset
+						   (le_key_version(key),
+						    key)) == 1))
+				reiserfs_warning(th->t_super,
+						 "vs-5355: reiserfs_delete_solid_item: %k not found",
+						 key);
+			break;
+		}
+		if (!tb_init) {
+			tb_init = 1;
+			item_len = ih_item_len(PATH_PITEM_HEAD(&path));
+			init_tb_struct(th, &tb, th->t_super, &path,
+				       -(IH_SIZE + item_len));
+		}
+		quota_cut_bytes = ih_item_len(PATH_PITEM_HEAD(&path));
+
+		retval = fix_nodes(M_DELETE, &tb, NULL, NULL);
+		if (retval == REPEAT_SEARCH) {
+			PROC_INFO_INC(th->t_super, delete_solid_item_restarted);
+			continue;
+		}
+
+		if (retval == CARRY_ON) {
+			do_balance(&tb, NULL, NULL, M_DELETE);
+			if (inode) {	/* Should we count quota for item? (we don't count quotas for save-links) */
+#ifdef REISERQUOTA_DEBUG
+				reiserfs_debug(th->t_super, REISERFS_DEBUG_CODE,
+					       "reiserquota delete_solid_item(): freeing %u id=%u type=%c",
+					       quota_cut_bytes, inode->i_uid,
+					       key2type(key));
+#endif
+				DQUOT_FREE_SPACE_NODIRTY(inode,
+							 quota_cut_bytes);
+			}
+			break;
+		}
+		// IO_ERROR, NO_DISK_SPACE, etc
+		reiserfs_warning(th->t_super,
+				 "vs-5360: reiserfs_delete_solid_item: "
+				 "could not delete %K due to fix_nodes failure",
+				 &cpu_key);
+		unfix_nodes(&tb);
+		break;
+	}
+
+	reiserfs_check_path(&path);
+}
+
+int reiserfs_delete_object(struct reiserfs_transaction_handle *th,
+			   struct inode *inode)
+{
+	int err;
+	inode->i_size = 0;
+	BUG_ON(!th->t_trans_id);
+
+	/* for directory this deletes item containing "." and ".." */
+	err =
+	    reiserfs_do_truncate(th, inode, NULL, 0 /*no timestamp updates */ );
+	if (err)
+		return err;
+
+#if defined( USE_INODE_GENERATION_COUNTER )
+	if (!old_format_only(th->t_super)) {
+		__le32 *inode_generation;
+
+		inode_generation =
+		    &REISERFS_SB(th->t_super)->s_rs->s_inode_generation;
+		le32_add_cpu(inode_generation, 1);
+	}
+/* USE_INODE_GENERATION_COUNTER */
+#endif
+	reiserfs_delete_solid_item(th, inode, INODE_PKEY(inode));
+
+	return err;
+}
+
+static void unmap_buffers(struct page *page, loff_t pos)
+{
+	struct buffer_head *bh;
+	struct buffer_head *head;
+	struct buffer_head *next;
+	unsigned long tail_index;
+	unsigned long cur_index;
+
+	if (page) {
+		if (page_has_buffers(page)) {
+			tail_index = pos & (PAGE_CACHE_SIZE - 1);
+			cur_index = 0;
+			head = page_buffers(page);
+			bh = head;
+			do {
+				next = bh->b_this_page;
+
+				/* we want to unmap the buffers that contain the tail, and
+				 ** all the buffers after it (since the tail must be at the
+				 ** end of the file).  We don't want to unmap file data
+				 ** before the tail, since it might be dirty and waiting to
+				 ** reach disk
+				 */
+				cur_index += bh->b_size;
+				if (cur_index > tail_index) {
+					reiserfs_unmap_buffer(bh);
+				}
+				bh = next;
+			} while (bh != head);
+		}
+	}
+}
+
+static int maybe_indirect_to_direct(struct reiserfs_transaction_handle *th,
+				    struct inode *p_s_inode,
+				    struct page *page,
+				    struct treepath *p_s_path,
+				    const struct cpu_key *p_s_item_key,
+				    loff_t n_new_file_size, char *p_c_mode)
+{
+	struct super_block *p_s_sb = p_s_inode->i_sb;
+	int n_block_size = p_s_sb->s_blocksize;
+	int cut_bytes;
+	BUG_ON(!th->t_trans_id);
+	BUG_ON(n_new_file_size != p_s_inode->i_size);
+
+	/* the page being sent in could be NULL if there was an i/o error
+	 ** reading in the last block.  The user will hit problems trying to
+	 ** read the file, but for now we just skip the indirect2direct
+	 */
+	if (atomic_read(&p_s_inode->i_count) > 1 ||
+	    !tail_has_to_be_packed(p_s_inode) ||
+	    !page || (REISERFS_I(p_s_inode)->i_flags & i_nopack_mask)) {
+		// leave tail in an unformatted node    
+		*p_c_mode = M_SKIP_BALANCING;
+		cut_bytes =
+		    n_block_size - (n_new_file_size & (n_block_size - 1));
+		pathrelse(p_s_path);
+		return cut_bytes;
+	}
+	/* Permorm the conversion to a direct_item. */
+	/*return indirect_to_direct (p_s_inode, p_s_path, p_s_item_key, n_new_file_size, p_c_mode); */
+	return indirect2direct(th, p_s_inode, page, p_s_path, p_s_item_key,
+			       n_new_file_size, p_c_mode);
+}
+
+/* we did indirect_to_direct conversion. And we have inserted direct
+   item successesfully, but there were no disk space to cut unfm
+   pointer being converted. Therefore we have to delete inserted
+   direct item(s) */
+static void indirect_to_direct_roll_back(struct reiserfs_transaction_handle *th,
+					 struct inode *inode, struct treepath *path)
+{
+	struct cpu_key tail_key;
+	int tail_len;
+	int removed;
+	BUG_ON(!th->t_trans_id);
+
+	make_cpu_key(&tail_key, inode, inode->i_size + 1, TYPE_DIRECT, 4);	// !!!!
+	tail_key.key_length = 4;
+
+	tail_len =
+	    (cpu_key_k_offset(&tail_key) & (inode->i_sb->s_blocksize - 1)) - 1;
+	while (tail_len) {
+		/* look for the last byte of the tail */
+		if (search_for_position_by_key(inode->i_sb, &tail_key, path) ==
+		    POSITION_NOT_FOUND)
+			reiserfs_panic(inode->i_sb,
+				       "vs-5615: indirect_to_direct_roll_back: found invalid item");
+		RFALSE(path->pos_in_item !=
+		       ih_item_len(PATH_PITEM_HEAD(path)) - 1,
+		       "vs-5616: appended bytes found");
+		PATH_LAST_POSITION(path)--;
+
+		removed =
+		    reiserfs_delete_item(th, path, &tail_key, inode,
+					 NULL /*unbh not needed */ );
+		RFALSE(removed <= 0
+		       || removed > tail_len,
+		       "vs-5617: there was tail %d bytes, removed item length %d bytes",
+		       tail_len, removed);
+		tail_len -= removed;
+		set_cpu_key_k_offset(&tail_key,
+				     cpu_key_k_offset(&tail_key) - removed);
+	}
+	reiserfs_warning(inode->i_sb,
+			 "indirect_to_direct_roll_back: indirect_to_direct conversion has been rolled back due to lack of disk space");
+	//mark_file_without_tail (inode);
+	mark_inode_dirty(inode);
+}
+
+/* (Truncate or cut entry) or delete object item. Returns < 0 on failure */
+int reiserfs_cut_from_item(struct reiserfs_transaction_handle *th,
+			   struct treepath *p_s_path,
+			   struct cpu_key *p_s_item_key,
+			   struct inode *p_s_inode,
+			   struct page *page, loff_t n_new_file_size)
+{
+	struct super_block *p_s_sb = p_s_inode->i_sb;
+	/* Every function which is going to call do_balance must first
+	   create a tree_balance structure.  Then it must fill up this
+	   structure by using the init_tb_struct and fix_nodes functions.
+	   After that we can make tree balancing. */
+	struct tree_balance s_cut_balance;
+	struct item_head *p_le_ih;
+	int n_cut_size = 0,	/* Amount to be cut. */
+	    n_ret_value = CARRY_ON, n_removed = 0,	/* Number of the removed unformatted nodes. */
+	    n_is_inode_locked = 0;
+	char c_mode;		/* Mode of the balance. */
+	int retval2 = -1;
+	int quota_cut_bytes;
+	loff_t tail_pos = 0;
+
+	BUG_ON(!th->t_trans_id);
+
+	init_tb_struct(th, &s_cut_balance, p_s_inode->i_sb, p_s_path,
+		       n_cut_size);
+
+	/* Repeat this loop until we either cut the item without needing
+	   to balance, or we fix_nodes without schedule occurring */
+	while (1) {
+		/* Determine the balance mode, position of the first byte to
+		   be cut, and size to be cut.  In case of the indirect item
+		   free unformatted nodes which are pointed to by the cut
+		   pointers. */
+
+		c_mode =
+		    prepare_for_delete_or_cut(th, p_s_inode, p_s_path,
+					      p_s_item_key, &n_removed,
+					      &n_cut_size, n_new_file_size);
+		if (c_mode == M_CONVERT) {
+			/* convert last unformatted node to direct item or leave
+			   tail in the unformatted node */
+			RFALSE(n_ret_value != CARRY_ON,
+			       "PAP-5570: can not convert twice");
+
+			n_ret_value =
+			    maybe_indirect_to_direct(th, p_s_inode, page,
+						     p_s_path, p_s_item_key,
+						     n_new_file_size, &c_mode);
+			if (c_mode == M_SKIP_BALANCING)
+				/* tail has been left in the unformatted node */
+				return n_ret_value;
+
+			n_is_inode_locked = 1;
+
+			/* removing of last unformatted node will change value we
+			   have to return to truncate. Save it */
+			retval2 = n_ret_value;
+			/*retval2 = p_s_sb->s_blocksize - (n_new_file_size & (p_s_sb->s_blocksize - 1)); */
+
+			/* So, we have performed the first part of the conversion:
+			   inserting the new direct item.  Now we are removing the
+			   last unformatted node pointer. Set key to search for
+			   it. */
+			set_cpu_key_k_type(p_s_item_key, TYPE_INDIRECT);
+			p_s_item_key->key_length = 4;
+			n_new_file_size -=
+			    (n_new_file_size & (p_s_sb->s_blocksize - 1));
+			tail_pos = n_new_file_size;
+			set_cpu_key_k_offset(p_s_item_key, n_new_file_size + 1);
+			if (search_for_position_by_key
+			    (p_s_sb, p_s_item_key,
+			     p_s_path) == POSITION_NOT_FOUND) {
+				print_block(PATH_PLAST_BUFFER(p_s_path), 3,
+					    PATH_LAST_POSITION(p_s_path) - 1,
+					    PATH_LAST_POSITION(p_s_path) + 1);
+				reiserfs_panic(p_s_sb,
+					       "PAP-5580: reiserfs_cut_from_item: item to convert does not exist (%K)",
+					       p_s_item_key);
+			}
+			continue;
+		}
+		if (n_cut_size == 0) {
+			pathrelse(p_s_path);
+			return 0;
+		}
+
+		s_cut_balance.insert_size[0] = n_cut_size;
+
+		n_ret_value = fix_nodes(c_mode, &s_cut_balance, NULL, NULL);
+		if (n_ret_value != REPEAT_SEARCH)
+			break;
+
+		PROC_INFO_INC(p_s_sb, cut_from_item_restarted);
+
+		n_ret_value =
+		    search_for_position_by_key(p_s_sb, p_s_item_key, p_s_path);
+		if (n_ret_value == POSITION_FOUND)
+			continue;
+
+		reiserfs_warning(p_s_sb,
+				 "PAP-5610: reiserfs_cut_from_item: item %K not found",
+				 p_s_item_key);
+		unfix_nodes(&s_cut_balance);
+		return (n_ret_value == IO_ERROR) ? -EIO : -ENOENT;
+	}			/* while */
+
+	// check fix_nodes results (IO_ERROR or NO_DISK_SPACE)
+	if (n_ret_value != CARRY_ON) {
+		if (n_is_inode_locked) {
+			// FIXME: this seems to be not needed: we are always able
+			// to cut item
+			indirect_to_direct_roll_back(th, p_s_inode, p_s_path);
+		}
+		if (n_ret_value == NO_DISK_SPACE)
+			reiserfs_warning(p_s_sb, "NO_DISK_SPACE");
+		unfix_nodes(&s_cut_balance);
+		return -EIO;
+	}
+
+	/* go ahead and perform balancing */
+
+	RFALSE(c_mode == M_PASTE || c_mode == M_INSERT, "invalid mode");
+
+	/* Calculate number of bytes that need to be cut from the item. */
+	quota_cut_bytes =
+	    (c_mode ==
+	     M_DELETE) ? ih_item_len(get_ih(p_s_path)) : -s_cut_balance.
+	    insert_size[0];
+	if (retval2 == -1)
+		n_ret_value = calc_deleted_bytes_number(&s_cut_balance, c_mode);
+	else
+		n_ret_value = retval2;
+
+	/* For direct items, we only change the quota when deleting the last
+	 ** item.
+	 */
+	p_le_ih = PATH_PITEM_HEAD(s_cut_balance.tb_path);
+	if (!S_ISLNK(p_s_inode->i_mode) && is_direct_le_ih(p_le_ih)) {
+		if (c_mode == M_DELETE &&
+		    (le_ih_k_offset(p_le_ih) & (p_s_sb->s_blocksize - 1)) ==
+		    1) {
+			// FIXME: this is to keep 3.5 happy
+			REISERFS_I(p_s_inode)->i_first_direct_byte = U32_MAX;
+			quota_cut_bytes = p_s_sb->s_blocksize + UNFM_P_SIZE;
+		} else {
+			quota_cut_bytes = 0;
+		}
+	}
+#ifdef CONFIG_REISERFS_CHECK
+	if (n_is_inode_locked) {
+		struct item_head *le_ih =
+		    PATH_PITEM_HEAD(s_cut_balance.tb_path);
+		/* we are going to complete indirect2direct conversion. Make
+		   sure, that we exactly remove last unformatted node pointer
+		   of the item */
+		if (!is_indirect_le_ih(le_ih))
+			reiserfs_panic(p_s_sb,
+				       "vs-5652: reiserfs_cut_from_item: "
+				       "item must be indirect %h", le_ih);
+
+		if (c_mode == M_DELETE && ih_item_len(le_ih) != UNFM_P_SIZE)
+			reiserfs_panic(p_s_sb,
+				       "vs-5653: reiserfs_cut_from_item: "
+				       "completing indirect2direct conversion indirect item %h "
+				       "being deleted must be of 4 byte long",
+				       le_ih);
+
+		if (c_mode == M_CUT
+		    && s_cut_balance.insert_size[0] != -UNFM_P_SIZE) {
+			reiserfs_panic(p_s_sb,
+				       "vs-5654: reiserfs_cut_from_item: "
+				       "can not complete indirect2direct conversion of %h (CUT, insert_size==%d)",
+				       le_ih, s_cut_balance.insert_size[0]);
+		}
+		/* it would be useful to make sure, that right neighboring
+		   item is direct item of this file */
+	}
+#endif
+
+	do_balance(&s_cut_balance, NULL, NULL, c_mode);
+	if (n_is_inode_locked) {
+		/* we've done an indirect->direct conversion.  when the data block
+		 ** was freed, it was removed from the list of blocks that must
+		 ** be flushed before the transaction commits, make sure to
+		 ** unmap and invalidate it
+		 */
+		unmap_buffers(page, tail_pos);
+		REISERFS_I(p_s_inode)->i_flags &= ~i_pack_on_close_mask;
+	}
+#ifdef REISERQUOTA_DEBUG
+	reiserfs_debug(p_s_inode->i_sb, REISERFS_DEBUG_CODE,
+		       "reiserquota cut_from_item(): freeing %u id=%u type=%c",
+		       quota_cut_bytes, p_s_inode->i_uid, '?');
+#endif
+	DQUOT_FREE_SPACE_NODIRTY(p_s_inode, quota_cut_bytes);
+	return n_ret_value;
+}
+
+static void truncate_directory(struct reiserfs_transaction_handle *th,
+			       struct inode *inode)
+{
+	BUG_ON(!th->t_trans_id);
+	if (inode->i_nlink)
+		reiserfs_warning(inode->i_sb,
+				 "vs-5655: truncate_directory: link count != 0");
+
+	set_le_key_k_offset(KEY_FORMAT_3_5, INODE_PKEY(inode), DOT_OFFSET);
+	set_le_key_k_type(KEY_FORMAT_3_5, INODE_PKEY(inode), TYPE_DIRENTRY);
+	reiserfs_delete_solid_item(th, inode, INODE_PKEY(inode));
+	reiserfs_update_sd(th, inode);
+	set_le_key_k_offset(KEY_FORMAT_3_5, INODE_PKEY(inode), SD_OFFSET);
+	set_le_key_k_type(KEY_FORMAT_3_5, INODE_PKEY(inode), TYPE_STAT_DATA);
+}
+
+/* Truncate file to the new size. Note, this must be called with a transaction
+   already started */
+int reiserfs_do_truncate(struct reiserfs_transaction_handle *th, struct inode *p_s_inode,	/* ->i_size contains new
+												   size */
+			 struct page *page,	/* up to date for last block */
+			 int update_timestamps	/* when it is called by
+						   file_release to convert
+						   the tail - no timestamps
+						   should be updated */
+    )
+{
+	INITIALIZE_PATH(s_search_path);	/* Path to the current object item. */
+	struct item_head *p_le_ih;	/* Pointer to an item header. */
+	struct cpu_key s_item_key;	/* Key to search for a previous file item. */
+	loff_t n_file_size,	/* Old file size. */
+	 n_new_file_size;	/* New file size. */
+	int n_deleted;		/* Number of deleted or truncated bytes. */
+	int retval;
+	int err = 0;
+
+	BUG_ON(!th->t_trans_id);
+	if (!
+	    (S_ISREG(p_s_inode->i_mode) || S_ISDIR(p_s_inode->i_mode)
+	     || S_ISLNK(p_s_inode->i_mode)))
+		return 0;
+
+	if (S_ISDIR(p_s_inode->i_mode)) {
+		// deletion of directory - no need to update timestamps
+		truncate_directory(th, p_s_inode);
+		return 0;
+	}
+
+	/* Get new file size. */
+	n_new_file_size = p_s_inode->i_size;
+
+	// FIXME: note, that key type is unimportant here
+	make_cpu_key(&s_item_key, p_s_inode, max_reiserfs_offset(p_s_inode),
+		     TYPE_DIRECT, 3);
+
+	retval =
+	    search_for_position_by_key(p_s_inode->i_sb, &s_item_key,
+				       &s_search_path);
+	if (retval == IO_ERROR) {
+		reiserfs_warning(p_s_inode->i_sb,
+				 "vs-5657: reiserfs_do_truncate: "
+				 "i/o failure occurred trying to truncate %K",
+				 &s_item_key);
+		err = -EIO;
+		goto out;
+	}
+	if (retval == POSITION_FOUND || retval == FILE_NOT_FOUND) {
+		reiserfs_warning(p_s_inode->i_sb,
+				 "PAP-5660: reiserfs_do_truncate: "
+				 "wrong result %d of search for %K", retval,
+				 &s_item_key);
+
+		err = -EIO;
+		goto out;
+	}
+
+	s_search_path.pos_in_item--;
+
+	/* Get real file size (total length of all file items) */
+	p_le_ih = PATH_PITEM_HEAD(&s_search_path);
+	if (is_statdata_le_ih(p_le_ih))
+		n_file_size = 0;
+	else {
+		loff_t offset = le_ih_k_offset(p_le_ih);
+		int bytes =
+		    op_bytes_number(p_le_ih, p_s_inode->i_sb->s_blocksize);
+
+		/* this may mismatch with real file size: if last direct item
+		   had no padding zeros and last unformatted node had no free
+		   space, this file would have this file size */
+		n_file_size = offset + bytes - 1;
+	}
+	/*
+	 * are we doing a full truncate or delete, if so
+	 * kick in the reada code
+	 */
+	if (n_new_file_size == 0)
+		s_search_path.reada = PATH_READA | PATH_READA_BACK;
+
+	if (n_file_size == 0 || n_file_size < n_new_file_size) {
+		goto update_and_out;
+	}
+
+	/* Update key to search for the last file item. */
+	set_cpu_key_k_offset(&s_item_key, n_file_size);
+
+	do {
+		/* Cut or delete file item. */
+		n_deleted =
+		    reiserfs_cut_from_item(th, &s_search_path, &s_item_key,
+					   p_s_inode, page, n_new_file_size);
+		if (n_deleted < 0) {
+			reiserfs_warning(p_s_inode->i_sb,
+					 "vs-5665: reiserfs_do_truncate: reiserfs_cut_from_item failed");
+			reiserfs_check_path(&s_search_path);
+			return 0;
+		}
+
+		RFALSE(n_deleted > n_file_size,
+		       "PAP-5670: reiserfs_cut_from_item: too many bytes deleted: deleted %d, file_size %lu, item_key %K",
+		       n_deleted, n_file_size, &s_item_key);
+
+		/* Change key to search the last file item. */
+		n_file_size -= n_deleted;
+
+		set_cpu_key_k_offset(&s_item_key, n_file_size);
+
+		/* While there are bytes to truncate and previous file item is presented in the tree. */
+
+		/*
+		 ** This loop could take a really long time, and could log 
+		 ** many more blocks than a transaction can hold.  So, we do a polite
+		 ** journal end here, and if the transaction needs ending, we make
+		 ** sure the file is consistent before ending the current trans
+		 ** and starting a new one
+		 */
+		if (journal_transaction_should_end(th, 0) ||
+		    reiserfs_transaction_free_space(th) <= JOURNAL_FOR_FREE_BLOCK_AND_UPDATE_SD) {
+			int orig_len_alloc = th->t_blocks_allocated;
+			decrement_counters_in_path(&s_search_path);
+
+			if (update_timestamps) {
+				p_s_inode->i_mtime = p_s_inode->i_ctime =
+				    CURRENT_TIME_SEC;
+			}
+			reiserfs_update_sd(th, p_s_inode);
+
+			err = journal_end(th, p_s_inode->i_sb, orig_len_alloc);
+			if (err)
+				goto out;
+			err = journal_begin(th, p_s_inode->i_sb,
+					    JOURNAL_FOR_FREE_BLOCK_AND_UPDATE_SD + JOURNAL_PER_BALANCE_CNT * 4) ;
+			if (err)
+				goto out;
+			reiserfs_update_inode_transaction(p_s_inode);
+		}
+	} while (n_file_size > ROUND_UP(n_new_file_size) &&
+		 search_for_position_by_key(p_s_inode->i_sb, &s_item_key,
+					    &s_search_path) == POSITION_FOUND);
+
+	RFALSE(n_file_size > ROUND_UP(n_new_file_size),
+	       "PAP-5680: truncate did not finish: new_file_size %Ld, current %Ld, oid %d",
+	       n_new_file_size, n_file_size, s_item_key.on_disk_key.k_objectid);
+
+      update_and_out:
+	if (update_timestamps) {
+		// this is truncate, not file closing
+		p_s_inode->i_mtime = p_s_inode->i_ctime = CURRENT_TIME_SEC;
+	}
+	reiserfs_update_sd(th, p_s_inode);
+
+      out:
+	pathrelse(&s_search_path);
+	return err;
+}
+
+#ifdef CONFIG_REISERFS_CHECK
+// this makes sure, that we __append__, not overwrite or add holes
+static void check_research_for_paste(struct treepath *path,
+				     const struct cpu_key *p_s_key)
+{
+	struct item_head *found_ih = get_ih(path);
+
+	if (is_direct_le_ih(found_ih)) {
+		if (le_ih_k_offset(found_ih) +
+		    op_bytes_number(found_ih,
+				    get_last_bh(path)->b_size) !=
+		    cpu_key_k_offset(p_s_key)
+		    || op_bytes_number(found_ih,
+				       get_last_bh(path)->b_size) !=
+		    pos_in_item(path))
+			reiserfs_panic(NULL,
+				       "PAP-5720: check_research_for_paste: "
+				       "found direct item %h or position (%d) does not match to key %K",
+				       found_ih, pos_in_item(path), p_s_key);
+	}
+	if (is_indirect_le_ih(found_ih)) {
+		if (le_ih_k_offset(found_ih) +
+		    op_bytes_number(found_ih,
+				    get_last_bh(path)->b_size) !=
+		    cpu_key_k_offset(p_s_key)
+		    || I_UNFM_NUM(found_ih) != pos_in_item(path)
+		    || get_ih_free_space(found_ih) != 0)
+			reiserfs_panic(NULL,
+				       "PAP-5730: check_research_for_paste: "
+				       "found indirect item (%h) or position (%d) does not match to key (%K)",
+				       found_ih, pos_in_item(path), p_s_key);
+	}
+}
+#endif				/* config reiserfs check */
+
+/* Paste bytes to the existing item. Returns bytes number pasted into the item. */
+int reiserfs_paste_into_item(struct reiserfs_transaction_handle *th, struct treepath *p_s_search_path,	/* Path to the pasted item.          */
+			     const struct cpu_key *p_s_key,	/* Key to search for the needed item. */
+			     struct inode *inode,	/* Inode item belongs to */
+			     const char *p_c_body,	/* Pointer to the bytes to paste.    */
+			     int n_pasted_size)
+{				/* Size of pasted bytes.             */
+	struct tree_balance s_paste_balance;
+	int retval;
+	int fs_gen;
+
+	BUG_ON(!th->t_trans_id);
+
+	fs_gen = get_generation(inode->i_sb);
+
+#ifdef REISERQUOTA_DEBUG
+	reiserfs_debug(inode->i_sb, REISERFS_DEBUG_CODE,
+		       "reiserquota paste_into_item(): allocating %u id=%u type=%c",
+		       n_pasted_size, inode->i_uid,
+		       key2type(&(p_s_key->on_disk_key)));
+#endif
+
+	if (DQUOT_ALLOC_SPACE_NODIRTY(inode, n_pasted_size)) {
+		pathrelse(p_s_search_path);
+		return -EDQUOT;
+	}
+	init_tb_struct(th, &s_paste_balance, th->t_super, p_s_search_path,
+		       n_pasted_size);
+#ifdef DISPLACE_NEW_PACKING_LOCALITIES
+	s_paste_balance.key = p_s_key->on_disk_key;
+#endif
+
+	/* DQUOT_* can schedule, must check before the fix_nodes */
+	if (fs_changed(fs_gen, inode->i_sb)) {
+		goto search_again;
+	}
+
+	while ((retval =
+		fix_nodes(M_PASTE, &s_paste_balance, NULL,
+			  p_c_body)) == REPEAT_SEARCH) {
+	      search_again:
+		/* file system changed while we were in the fix_nodes */
+		PROC_INFO_INC(th->t_super, paste_into_item_restarted);
+		retval =
+		    search_for_position_by_key(th->t_super, p_s_key,
+					       p_s_search_path);
+		if (retval == IO_ERROR) {
+			retval = -EIO;
+			goto error_out;
+		}
+		if (retval == POSITION_FOUND) {
+			reiserfs_warning(inode->i_sb,
+					 "PAP-5710: reiserfs_paste_into_item: entry or pasted byte (%K) exists",
+					 p_s_key);
+			retval = -EEXIST;
+			goto error_out;
+		}
+#ifdef CONFIG_REISERFS_CHECK
+		check_research_for_paste(p_s_search_path, p_s_key);
+#endif
+	}
+
+	/* Perform balancing after all resources are collected by fix_nodes, and
+	   accessing them will not risk triggering schedule. */
+	if (retval == CARRY_ON) {
+		do_balance(&s_paste_balance, NULL /*ih */ , p_c_body, M_PASTE);
+		return 0;
+	}
+	retval = (retval == NO_DISK_SPACE) ? -ENOSPC : -EIO;
+      error_out:
+	/* this also releases the path */
+	unfix_nodes(&s_paste_balance);
+#ifdef REISERQUOTA_DEBUG
+	reiserfs_debug(inode->i_sb, REISERFS_DEBUG_CODE,
+		       "reiserquota paste_into_item(): freeing %u id=%u type=%c",
+		       n_pasted_size, inode->i_uid,
+		       key2type(&(p_s_key->on_disk_key)));
+#endif
+	DQUOT_FREE_SPACE_NODIRTY(inode, n_pasted_size);
+	return retval;
+}
+
+/* Insert new item into the buffer at the path. */
+int reiserfs_insert_item(struct reiserfs_transaction_handle *th, struct treepath *p_s_path,	/* Path to the inserteded item.         */
+			 const struct cpu_key *key, struct item_head *p_s_ih,	/* Pointer to the item header to insert. */
+			 struct inode *inode, const char *p_c_body)
+{				/* Pointer to the bytes to insert.      */
+	struct tree_balance s_ins_balance;
+	int retval;
+	int fs_gen = 0;
+	int quota_bytes = 0;
+
+	BUG_ON(!th->t_trans_id);
+
+	if (inode) {		/* Do we count quotas for item? */
+		fs_gen = get_generation(inode->i_sb);
+		quota_bytes = ih_item_len(p_s_ih);
+
+		/* hack so the quota code doesn't have to guess if the file has
+		 ** a tail, links are always tails, so there's no guessing needed
+		 */
+		if (!S_ISLNK(inode->i_mode) && is_direct_le_ih(p_s_ih)) {
+			quota_bytes = inode->i_sb->s_blocksize + UNFM_P_SIZE;
+		}
+#ifdef REISERQUOTA_DEBUG
+		reiserfs_debug(inode->i_sb, REISERFS_DEBUG_CODE,
+			       "reiserquota insert_item(): allocating %u id=%u type=%c",
+			       quota_bytes, inode->i_uid, head2type(p_s_ih));
+#endif
+		/* We can't dirty inode here. It would be immediately written but
+		 * appropriate stat item isn't inserted yet... */
+		if (DQUOT_ALLOC_SPACE_NODIRTY(inode, quota_bytes)) {
+			pathrelse(p_s_path);
+			return -EDQUOT;
+		}
+	}
+	init_tb_struct(th, &s_ins_balance, th->t_super, p_s_path,
+		       IH_SIZE + ih_item_len(p_s_ih));
+#ifdef DISPLACE_NEW_PACKING_LOCALITIES
+	s_ins_balance.key = key->on_disk_key;
+#endif
+	/* DQUOT_* can schedule, must check to be sure calling fix_nodes is safe */
+	if (inode && fs_changed(fs_gen, inode->i_sb)) {
+		goto search_again;
+	}
+
+	while ((retval =
+		fix_nodes(M_INSERT, &s_ins_balance, p_s_ih,
+			  p_c_body)) == REPEAT_SEARCH) {
+	      search_again:
+		/* file system changed while we were in the fix_nodes */
+		PROC_INFO_INC(th->t_super, insert_item_restarted);
+		retval = search_item(th->t_super, key, p_s_path);
+		if (retval == IO_ERROR) {
+			retval = -EIO;
+			goto error_out;
+		}
+		if (retval == ITEM_FOUND) {
+			reiserfs_warning(th->t_super,
+					 "PAP-5760: reiserfs_insert_item: "
+					 "key %K already exists in the tree",
+					 key);
+			retval = -EEXIST;
+			goto error_out;
+		}
+	}
+
+	/* make balancing after all resources will be collected at a time */
+	if (retval == CARRY_ON) {
+		do_balance(&s_ins_balance, p_s_ih, p_c_body, M_INSERT);
+		return 0;
+	}
+
+	retval = (retval == NO_DISK_SPACE) ? -ENOSPC : -EIO;
+      error_out:
+	/* also releases the path */
+	unfix_nodes(&s_ins_balance);
+#ifdef REISERQUOTA_DEBUG
+	reiserfs_debug(th->t_super, REISERFS_DEBUG_CODE,
+		       "reiserquota insert_item(): freeing %u id=%u type=%c",
+		       quota_bytes, inode->i_uid, head2type(p_s_ih));
+#endif
+	if (inode)
+		DQUOT_FREE_SPACE_NODIRTY(inode, quota_bytes);
+	return retval;
+}
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
new file mode 100644
index 0000000..663a91f
--- /dev/null
+++ b/fs/reiserfs/super.c
@@ -0,0 +1,2295 @@
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ *
+ * Trivial changes by Alan Cox to add the LFS fixes
+ *
+ * Trivial Changes:
+ * Rights granted to Hans Reiser to redistribute under other terms providing
+ * he accepts all liability including but not limited to patent, fitness
+ * for purpose, and direct or indirect claims arising from failure to perform.
+ *
+ * NO WARRANTY
+ */
+
+#include <linux/module.h>
+#include <linux/vmalloc.h>
+#include <linux/time.h>
+#include <asm/uaccess.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/reiserfs_acl.h>
+#include <linux/reiserfs_xattr.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/buffer_head.h>
+#include <linux/exportfs.h>
+#include <linux/quotaops.h>
+#include <linux/vfs.h>
+#include <linux/mnt_namespace.h>
+#include <linux/mount.h>
+#include <linux/namei.h>
+
+struct file_system_type reiserfs_fs_type;
+
+static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
+static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
+static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
+
+int is_reiserfs_3_5(struct reiserfs_super_block *rs)
+{
+	return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
+			strlen(reiserfs_3_5_magic_string));
+}
+
+int is_reiserfs_3_6(struct reiserfs_super_block *rs)
+{
+	return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
+			strlen(reiserfs_3_6_magic_string));
+}
+
+int is_reiserfs_jr(struct reiserfs_super_block *rs)
+{
+	return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
+			strlen(reiserfs_jr_magic_string));
+}
+
+static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
+{
+	return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
+		is_reiserfs_jr(rs));
+}
+
+static int reiserfs_remount(struct super_block *s, int *flags, char *data);
+static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
+
+static int reiserfs_sync_fs(struct super_block *s, int wait)
+{
+	if (!(s->s_flags & MS_RDONLY)) {
+		struct reiserfs_transaction_handle th;
+		reiserfs_write_lock(s);
+		if (!journal_begin(&th, s, 1))
+			if (!journal_end_sync(&th, s, 1))
+				reiserfs_flush_old_commits(s);
+		s->s_dirt = 0;	/* Even if it's not true.
+				 * We'll loop forever in sync_supers otherwise */
+		reiserfs_write_unlock(s);
+	} else {
+		s->s_dirt = 0;
+	}
+	return 0;
+}
+
+static void reiserfs_write_super(struct super_block *s)
+{
+	reiserfs_sync_fs(s, 1);
+}
+
+static void reiserfs_write_super_lockfs(struct super_block *s)
+{
+	struct reiserfs_transaction_handle th;
+	reiserfs_write_lock(s);
+	if (!(s->s_flags & MS_RDONLY)) {
+		int err = journal_begin(&th, s, 1);
+		if (err) {
+			reiserfs_block_writes(&th);
+		} else {
+			reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
+						     1);
+			journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
+			reiserfs_block_writes(&th);
+			journal_end_sync(&th, s, 1);
+		}
+	}
+	s->s_dirt = 0;
+	reiserfs_write_unlock(s);
+}
+
+static void reiserfs_unlockfs(struct super_block *s)
+{
+	reiserfs_allow_writes(s);
+}
+
+extern const struct in_core_key MAX_IN_CORE_KEY;
+
+/* this is used to delete "save link" when there are no items of a
+   file it points to. It can either happen if unlink is completed but
+   "save unlink" removal, or if file has both unlink and truncate
+   pending and as unlink completes first (because key of "save link"
+   protecting unlink is bigger that a key lf "save link" which
+   protects truncate), so there left no items to make truncate
+   completion on */
+static int remove_save_link_only(struct super_block *s,
+				 struct reiserfs_key *key, int oid_free)
+{
+	struct reiserfs_transaction_handle th;
+	int err;
+
+	/* we are going to do one balancing */
+	err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
+	if (err)
+		return err;
+
+	reiserfs_delete_solid_item(&th, NULL, key);
+	if (oid_free)
+		/* removals are protected by direct items */
+		reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
+
+	return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT);
+}
+
+#ifdef CONFIG_QUOTA
+static int reiserfs_quota_on_mount(struct super_block *, int);
+#endif
+
+/* look for uncompleted unlinks and truncates and complete them */
+static int finish_unfinished(struct super_block *s)
+{
+	INITIALIZE_PATH(path);
+	struct cpu_key max_cpu_key, obj_key;
+	struct reiserfs_key save_link_key, last_inode_key;
+	int retval = 0;
+	struct item_head *ih;
+	struct buffer_head *bh;
+	int item_pos;
+	char *item;
+	int done;
+	struct inode *inode;
+	int truncate;
+#ifdef CONFIG_QUOTA
+	int i;
+	int ms_active_set;
+#endif
+
+	/* compose key to look for "save" links */
+	max_cpu_key.version = KEY_FORMAT_3_5;
+	max_cpu_key.on_disk_key.k_dir_id = ~0U;
+	max_cpu_key.on_disk_key.k_objectid = ~0U;
+	set_cpu_key_k_offset(&max_cpu_key, ~0U);
+	max_cpu_key.key_length = 3;
+
+	memset(&last_inode_key, 0, sizeof(last_inode_key));
+
+#ifdef CONFIG_QUOTA
+	/* Needed for iput() to work correctly and not trash data */
+	if (s->s_flags & MS_ACTIVE) {
+		ms_active_set = 0;
+	} else {
+		ms_active_set = 1;
+		s->s_flags |= MS_ACTIVE;
+	}
+	/* Turn on quotas so that they are updated correctly */
+	for (i = 0; i < MAXQUOTAS; i++) {
+		if (REISERFS_SB(s)->s_qf_names[i]) {
+			int ret = reiserfs_quota_on_mount(s, i);
+			if (ret < 0)
+				reiserfs_warning(s,
+						 "reiserfs: cannot turn on journaled quota: error %d",
+						 ret);
+		}
+	}
+#endif
+
+	done = 0;
+	REISERFS_SB(s)->s_is_unlinked_ok = 1;
+	while (!retval) {
+		retval = search_item(s, &max_cpu_key, &path);
+		if (retval != ITEM_NOT_FOUND) {
+			reiserfs_warning(s,
+					 "vs-2140: finish_unfinished: search_by_key returned %d",
+					 retval);
+			break;
+		}
+
+		bh = get_last_bh(&path);
+		item_pos = get_item_pos(&path);
+		if (item_pos != B_NR_ITEMS(bh)) {
+			reiserfs_warning(s,
+					 "vs-2060: finish_unfinished: wrong position found");
+			break;
+		}
+		item_pos--;
+		ih = B_N_PITEM_HEAD(bh, item_pos);
+
+		if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
+			/* there are no "save" links anymore */
+			break;
+
+		save_link_key = ih->ih_key;
+		if (is_indirect_le_ih(ih))
+			truncate = 1;
+		else
+			truncate = 0;
+
+		/* reiserfs_iget needs k_dirid and k_objectid only */
+		item = B_I_PITEM(bh, ih);
+		obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
+		obj_key.on_disk_key.k_objectid =
+		    le32_to_cpu(ih->ih_key.k_objectid);
+		obj_key.on_disk_key.k_offset = 0;
+		obj_key.on_disk_key.k_type = 0;
+
+		pathrelse(&path);
+
+		inode = reiserfs_iget(s, &obj_key);
+		if (!inode) {
+			/* the unlink almost completed, it just did not manage to remove
+			   "save" link and release objectid */
+			reiserfs_warning(s,
+					 "vs-2180: finish_unfinished: iget failed for %K",
+					 &obj_key);
+			retval = remove_save_link_only(s, &save_link_key, 1);
+			continue;
+		}
+
+		if (!truncate && inode->i_nlink) {
+			/* file is not unlinked */
+			reiserfs_warning(s,
+					 "vs-2185: finish_unfinished: file %K is not unlinked",
+					 &obj_key);
+			retval = remove_save_link_only(s, &save_link_key, 0);
+			continue;
+		}
+		DQUOT_INIT(inode);
+
+		if (truncate && S_ISDIR(inode->i_mode)) {
+			/* We got a truncate request for a dir which is impossible.
+			   The only imaginable way is to execute unfinished truncate request
+			   then boot into old kernel, remove the file and create dir with
+			   the same key. */
+			reiserfs_warning(s,
+					 "green-2101: impossible truncate on a directory %k. Please report",
+					 INODE_PKEY(inode));
+			retval = remove_save_link_only(s, &save_link_key, 0);
+			truncate = 0;
+			iput(inode);
+			continue;
+		}
+
+		if (truncate) {
+			REISERFS_I(inode)->i_flags |=
+			    i_link_saved_truncate_mask;
+			/* not completed truncate found. New size was committed together
+			   with "save" link */
+			reiserfs_info(s, "Truncating %k to %Ld ..",
+				      INODE_PKEY(inode), inode->i_size);
+			reiserfs_truncate_file(inode,
+					       0
+					       /*don't update modification time */
+					       );
+			retval = remove_save_link(inode, truncate);
+		} else {
+			REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
+			/* not completed unlink (rmdir) found */
+			reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
+			if (memcmp(&last_inode_key, INODE_PKEY(inode),
+					sizeof(last_inode_key))){
+				last_inode_key = *INODE_PKEY(inode);
+				/* removal gets completed in iput */
+				retval = 0;
+			} else {
+				reiserfs_warning(s, "Dead loop in "
+						"finish_unfinished detected, "
+						"just remove save link\n");
+				retval = remove_save_link_only(s,
+							&save_link_key, 0);
+			}
+		}
+
+		iput(inode);
+		printk("done\n");
+		done++;
+	}
+	REISERFS_SB(s)->s_is_unlinked_ok = 0;
+
+#ifdef CONFIG_QUOTA
+	/* Turn quotas off */
+	for (i = 0; i < MAXQUOTAS; i++) {
+		if (sb_dqopt(s)->files[i])
+			vfs_quota_off(s, i, 0);
+	}
+	if (ms_active_set)
+		/* Restore the flag back */
+		s->s_flags &= ~MS_ACTIVE;
+#endif
+	pathrelse(&path);
+	if (done)
+		reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
+			      "Completed\n", done);
+	return retval;
+}
+
+/* to protect file being unlinked from getting lost we "safe" link files
+   being unlinked. This link will be deleted in the same transaction with last
+   item of file. mounting the filesystem we scan all these links and remove
+   files which almost got lost */
+void add_save_link(struct reiserfs_transaction_handle *th,
+		   struct inode *inode, int truncate)
+{
+	INITIALIZE_PATH(path);
+	int retval;
+	struct cpu_key key;
+	struct item_head ih;
+	__le32 link;
+
+	BUG_ON(!th->t_trans_id);
+
+	/* file can only get one "save link" of each kind */
+	RFALSE(truncate &&
+	       (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
+	       "saved link already exists for truncated inode %lx",
+	       (long)inode->i_ino);
+	RFALSE(!truncate &&
+	       (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
+	       "saved link already exists for unlinked inode %lx",
+	       (long)inode->i_ino);
+
+	/* setup key of "save" link */
+	key.version = KEY_FORMAT_3_5;
+	key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
+	key.on_disk_key.k_objectid = inode->i_ino;
+	if (!truncate) {
+		/* unlink, rmdir, rename */
+		set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
+		set_cpu_key_k_type(&key, TYPE_DIRECT);
+
+		/* item head of "safe" link */
+		make_le_item_head(&ih, &key, key.version,
+				  1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
+				  4 /*length */ , 0xffff /*free space */ );
+	} else {
+		/* truncate */
+		if (S_ISDIR(inode->i_mode))
+			reiserfs_warning(inode->i_sb,
+					 "green-2102: Adding a truncate savelink for a directory %k! Please report",
+					 INODE_PKEY(inode));
+		set_cpu_key_k_offset(&key, 1);
+		set_cpu_key_k_type(&key, TYPE_INDIRECT);
+
+		/* item head of "safe" link */
+		make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
+				  4 /*length */ , 0 /*free space */ );
+	}
+	key.key_length = 3;
+
+	/* look for its place in the tree */
+	retval = search_item(inode->i_sb, &key, &path);
+	if (retval != ITEM_NOT_FOUND) {
+		if (retval != -ENOSPC)
+			reiserfs_warning(inode->i_sb, "vs-2100: add_save_link:"
+					 "search_by_key (%K) returned %d", &key,
+					 retval);
+		pathrelse(&path);
+		return;
+	}
+
+	/* body of "save" link */
+	link = INODE_PKEY(inode)->k_dir_id;
+
+	/* put "save" link inot tree, don't charge quota to anyone */
+	retval =
+	    reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
+	if (retval) {
+		if (retval != -ENOSPC)
+			reiserfs_warning(inode->i_sb,
+					 "vs-2120: add_save_link: insert_item returned %d",
+					 retval);
+	} else {
+		if (truncate)
+			REISERFS_I(inode)->i_flags |=
+			    i_link_saved_truncate_mask;
+		else
+			REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
+	}
+}
+
+/* this opens transaction unlike add_save_link */
+int remove_save_link(struct inode *inode, int truncate)
+{
+	struct reiserfs_transaction_handle th;
+	struct reiserfs_key key;
+	int err;
+
+	/* we are going to do one balancing only */
+	err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
+	if (err)
+		return err;
+
+	/* setup key of "save" link */
+	key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
+	key.k_objectid = INODE_PKEY(inode)->k_objectid;
+	if (!truncate) {
+		/* unlink, rmdir, rename */
+		set_le_key_k_offset(KEY_FORMAT_3_5, &key,
+				    1 + inode->i_sb->s_blocksize);
+		set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
+	} else {
+		/* truncate */
+		set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
+		set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
+	}
+
+	if ((truncate &&
+	     (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
+	    (!truncate &&
+	     (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
+		/* don't take quota bytes from anywhere */
+		reiserfs_delete_solid_item(&th, NULL, &key);
+	if (!truncate) {
+		reiserfs_release_objectid(&th, inode->i_ino);
+		REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
+	} else
+		REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
+
+	return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
+}
+
+static void reiserfs_kill_sb(struct super_block *s)
+{
+	if (REISERFS_SB(s)) {
+#ifdef CONFIG_REISERFS_FS_XATTR
+		if (REISERFS_SB(s)->xattr_root) {
+			d_invalidate(REISERFS_SB(s)->xattr_root);
+			dput(REISERFS_SB(s)->xattr_root);
+			REISERFS_SB(s)->xattr_root = NULL;
+		}
+#endif
+		if (REISERFS_SB(s)->priv_root) {
+			d_invalidate(REISERFS_SB(s)->priv_root);
+			dput(REISERFS_SB(s)->priv_root);
+			REISERFS_SB(s)->priv_root = NULL;
+		}
+	}
+
+	kill_block_super(s);
+}
+
+static void reiserfs_put_super(struct super_block *s)
+{
+	struct reiserfs_transaction_handle th;
+	th.t_trans_id = 0;
+
+	/* change file system state to current state if it was mounted with read-write permissions */
+	if (!(s->s_flags & MS_RDONLY)) {
+		if (!journal_begin(&th, s, 10)) {
+			reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
+						     1);
+			set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
+					    REISERFS_SB(s)->s_mount_state);
+			journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
+		}
+	}
+
+	/* note, journal_release checks for readonly mount, and can decide not
+	 ** to do a journal_end
+	 */
+	journal_release(&th, s);
+
+	reiserfs_free_bitmap_cache(s);
+
+	brelse(SB_BUFFER_WITH_SB(s));
+
+	print_statistics(s);
+
+	if (REISERFS_SB(s)->reserved_blocks != 0) {
+		reiserfs_warning(s,
+				 "green-2005: reiserfs_put_super: reserved blocks left %d",
+				 REISERFS_SB(s)->reserved_blocks);
+	}
+
+	reiserfs_proc_info_done(s);
+
+	kfree(s->s_fs_info);
+	s->s_fs_info = NULL;
+
+	return;
+}
+
+static struct kmem_cache *reiserfs_inode_cachep;
+
+static struct inode *reiserfs_alloc_inode(struct super_block *sb)
+{
+	struct reiserfs_inode_info *ei;
+	ei = (struct reiserfs_inode_info *)
+	    kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
+	if (!ei)
+		return NULL;
+	return &ei->vfs_inode;
+}
+
+static void reiserfs_destroy_inode(struct inode *inode)
+{
+	kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
+}
+
+static void init_once(void *foo)
+{
+	struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
+
+	INIT_LIST_HEAD(&ei->i_prealloc_list);
+	inode_init_once(&ei->vfs_inode);
+#ifdef CONFIG_REISERFS_FS_POSIX_ACL
+	ei->i_acl_access = NULL;
+	ei->i_acl_default = NULL;
+#endif
+}
+
+static int init_inodecache(void)
+{
+	reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
+						  sizeof(struct
+							 reiserfs_inode_info),
+						  0, (SLAB_RECLAIM_ACCOUNT|
+							SLAB_MEM_SPREAD),
+						  init_once);
+	if (reiserfs_inode_cachep == NULL)
+		return -ENOMEM;
+	return 0;
+}
+
+static void destroy_inodecache(void)
+{
+	kmem_cache_destroy(reiserfs_inode_cachep);
+}
+
+/* we don't mark inodes dirty, we just log them */
+static void reiserfs_dirty_inode(struct inode *inode)
+{
+	struct reiserfs_transaction_handle th;
+
+	int err = 0;
+	if (inode->i_sb->s_flags & MS_RDONLY) {
+		reiserfs_warning(inode->i_sb,
+				 "clm-6006: writing inode %lu on readonly FS",
+				 inode->i_ino);
+		return;
+	}
+	reiserfs_write_lock(inode->i_sb);
+
+	/* this is really only used for atime updates, so they don't have
+	 ** to be included in O_SYNC or fsync
+	 */
+	err = journal_begin(&th, inode->i_sb, 1);
+	if (err) {
+		reiserfs_write_unlock(inode->i_sb);
+		return;
+	}
+	reiserfs_update_sd(&th, inode);
+	journal_end(&th, inode->i_sb, 1);
+	reiserfs_write_unlock(inode->i_sb);
+}
+
+#ifdef CONFIG_REISERFS_FS_POSIX_ACL
+static void reiserfs_clear_inode(struct inode *inode)
+{
+	struct posix_acl *acl;
+
+	acl = REISERFS_I(inode)->i_acl_access;
+	if (acl && !IS_ERR(acl))
+		posix_acl_release(acl);
+	REISERFS_I(inode)->i_acl_access = NULL;
+
+	acl = REISERFS_I(inode)->i_acl_default;
+	if (acl && !IS_ERR(acl))
+		posix_acl_release(acl);
+	REISERFS_I(inode)->i_acl_default = NULL;
+}
+#else
+#define reiserfs_clear_inode NULL
+#endif
+
+#ifdef CONFIG_QUOTA
+static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
+				    size_t, loff_t);
+static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
+				   loff_t);
+#endif
+
+static const struct super_operations reiserfs_sops = {
+	.alloc_inode = reiserfs_alloc_inode,
+	.destroy_inode = reiserfs_destroy_inode,
+	.write_inode = reiserfs_write_inode,
+	.dirty_inode = reiserfs_dirty_inode,
+	.delete_inode = reiserfs_delete_inode,
+	.clear_inode = reiserfs_clear_inode,
+	.put_super = reiserfs_put_super,
+	.write_super = reiserfs_write_super,
+	.sync_fs = reiserfs_sync_fs,
+	.write_super_lockfs = reiserfs_write_super_lockfs,
+	.unlockfs = reiserfs_unlockfs,
+	.statfs = reiserfs_statfs,
+	.remount_fs = reiserfs_remount,
+	.show_options = generic_show_options,
+#ifdef CONFIG_QUOTA
+	.quota_read = reiserfs_quota_read,
+	.quota_write = reiserfs_quota_write,
+#endif
+};
+
+#ifdef CONFIG_QUOTA
+#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
+
+static int reiserfs_dquot_initialize(struct inode *, int);
+static int reiserfs_dquot_drop(struct inode *);
+static int reiserfs_write_dquot(struct dquot *);
+static int reiserfs_acquire_dquot(struct dquot *);
+static int reiserfs_release_dquot(struct dquot *);
+static int reiserfs_mark_dquot_dirty(struct dquot *);
+static int reiserfs_write_info(struct super_block *, int);
+static int reiserfs_quota_on(struct super_block *, int, int, char *, int);
+
+static struct dquot_operations reiserfs_quota_operations = {
+	.initialize = reiserfs_dquot_initialize,
+	.drop = reiserfs_dquot_drop,
+	.alloc_space = dquot_alloc_space,
+	.alloc_inode = dquot_alloc_inode,
+	.free_space = dquot_free_space,
+	.free_inode = dquot_free_inode,
+	.transfer = dquot_transfer,
+	.write_dquot = reiserfs_write_dquot,
+	.acquire_dquot = reiserfs_acquire_dquot,
+	.release_dquot = reiserfs_release_dquot,
+	.mark_dirty = reiserfs_mark_dquot_dirty,
+	.write_info = reiserfs_write_info,
+};
+
+static struct quotactl_ops reiserfs_qctl_operations = {
+	.quota_on = reiserfs_quota_on,
+	.quota_off = vfs_quota_off,
+	.quota_sync = vfs_quota_sync,
+	.get_info = vfs_get_dqinfo,
+	.set_info = vfs_set_dqinfo,
+	.get_dqblk = vfs_get_dqblk,
+	.set_dqblk = vfs_set_dqblk,
+};
+#endif
+
+static const struct export_operations reiserfs_export_ops = {
+	.encode_fh = reiserfs_encode_fh,
+	.fh_to_dentry = reiserfs_fh_to_dentry,
+	.fh_to_parent = reiserfs_fh_to_parent,
+	.get_parent = reiserfs_get_parent,
+};
+
+/* this struct is used in reiserfs_getopt () for containing the value for those
+   mount options that have values rather than being toggles. */
+typedef struct {
+	char *value;
+	int setmask;		/* bitmask which is to set on mount_options bitmask when this
+				   value is found, 0 is no bits are to be changed. */
+	int clrmask;		/* bitmask which is to clear on mount_options bitmask when  this
+				   value is found, 0 is no bits are to be changed. This is
+				   applied BEFORE setmask */
+} arg_desc_t;
+
+/* Set this bit in arg_required to allow empty arguments */
+#define REISERFS_OPT_ALLOWEMPTY 31
+
+/* this struct is used in reiserfs_getopt() for describing the set of reiserfs
+   mount options */
+typedef struct {
+	char *option_name;
+	int arg_required;	/* 0 if argument is not required, not 0 otherwise */
+	const arg_desc_t *values;	/* list of values accepted by an option */
+	int setmask;		/* bitmask which is to set on mount_options bitmask when this
+				   value is found, 0 is no bits are to be changed. */
+	int clrmask;		/* bitmask which is to clear on mount_options bitmask when  this
+				   value is found, 0 is no bits are to be changed. This is
+				   applied BEFORE setmask */
+} opt_desc_t;
+
+/* possible values for -o data= */
+static const arg_desc_t logging_mode[] = {
+	{"ordered", 1 << REISERFS_DATA_ORDERED,
+	 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
+	{"journal", 1 << REISERFS_DATA_LOG,
+	 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
+	{"writeback", 1 << REISERFS_DATA_WRITEBACK,
+	 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
+	{.value = NULL}
+};
+
+/* possible values for -o barrier= */
+static const arg_desc_t barrier_mode[] = {
+	{"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
+	{"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
+	{.value = NULL}
+};
+
+/* possible values for "-o block-allocator=" and bits which are to be set in
+   s_mount_opt of reiserfs specific part of in-core super block */
+static const arg_desc_t balloc[] = {
+	{"noborder", 1 << REISERFS_NO_BORDER, 0},
+	{"border", 0, 1 << REISERFS_NO_BORDER},
+	{"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
+	{"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
+	{"test4", 1 << REISERFS_TEST4, 0},
+	{"notest4", 0, 1 << REISERFS_TEST4},
+	{NULL, 0, 0}
+};
+
+static const arg_desc_t tails[] = {
+	{"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
+	{"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
+	{"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
+	{NULL, 0, 0}
+};
+
+static const arg_desc_t error_actions[] = {
+	{"panic", 1 << REISERFS_ERROR_PANIC,
+	 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
+	{"ro-remount", 1 << REISERFS_ERROR_RO,
+	 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
+#ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
+	{"continue", 1 << REISERFS_ERROR_CONTINUE,
+	 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
+#endif
+	{NULL, 0, 0},
+};
+
+/* proceed only one option from a list *cur - string containing of mount options
+   opts - array of options which are accepted
+   opt_arg - if option is found and requires an argument and if it is specifed
+   in the input - pointer to the argument is stored here
+   bit_flags - if option requires to set a certain bit - it is set here
+   return -1 if unknown option is found, opt->arg_required otherwise */
+static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
+			   char **opt_arg, unsigned long *bit_flags)
+{
+	char *p;
+	/* foo=bar, 
+	   ^   ^  ^
+	   |   |  +-- option_end
+	   |   +-- arg_start
+	   +-- option_start
+	 */
+	const opt_desc_t *opt;
+	const arg_desc_t *arg;
+
+	p = *cur;
+
+	/* assume argument cannot contain commas */
+	*cur = strchr(p, ',');
+	if (*cur) {
+		*(*cur) = '\0';
+		(*cur)++;
+	}
+
+	if (!strncmp(p, "alloc=", 6)) {
+		/* Ugly special case, probably we should redo options parser so that
+		   it can understand several arguments for some options, also so that
+		   it can fill several bitfields with option values. */
+		if (reiserfs_parse_alloc_options(s, p + 6)) {
+			return -1;
+		} else {
+			return 0;
+		}
+	}
+
+	/* for every option in the list */
+	for (opt = opts; opt->option_name; opt++) {
+		if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
+			if (bit_flags) {
+				if (opt->clrmask ==
+				    (1 << REISERFS_UNSUPPORTED_OPT))
+					reiserfs_warning(s, "%s not supported.",
+							 p);
+				else
+					*bit_flags &= ~opt->clrmask;
+				if (opt->setmask ==
+				    (1 << REISERFS_UNSUPPORTED_OPT))
+					reiserfs_warning(s, "%s not supported.",
+							 p);
+				else
+					*bit_flags |= opt->setmask;
+			}
+			break;
+		}
+	}
+	if (!opt->option_name) {
+		reiserfs_warning(s, "unknown mount option \"%s\"", p);
+		return -1;
+	}
+
+	p += strlen(opt->option_name);
+	switch (*p) {
+	case '=':
+		if (!opt->arg_required) {
+			reiserfs_warning(s,
+					 "the option \"%s\" does not require an argument",
+					 opt->option_name);
+			return -1;
+		}
+		break;
+
+	case 0:
+		if (opt->arg_required) {
+			reiserfs_warning(s,
+					 "the option \"%s\" requires an argument",
+					 opt->option_name);
+			return -1;
+		}
+		break;
+	default:
+		reiserfs_warning(s, "head of option \"%s\" is only correct",
+				 opt->option_name);
+		return -1;
+	}
+
+	/* move to the argument, or to next option if argument is not required */
+	p++;
+
+	if (opt->arg_required
+	    && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
+	    && !strlen(p)) {
+		/* this catches "option=," if not allowed */
+		reiserfs_warning(s, "empty argument for \"%s\"",
+				 opt->option_name);
+		return -1;
+	}
+
+	if (!opt->values) {
+		/* *=NULLopt_arg contains pointer to argument */
+		*opt_arg = p;
+		return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
+	}
+
+	/* values possible for this option are listed in opt->values */
+	for (arg = opt->values; arg->value; arg++) {
+		if (!strcmp(p, arg->value)) {
+			if (bit_flags) {
+				*bit_flags &= ~arg->clrmask;
+				*bit_flags |= arg->setmask;
+			}
+			return opt->arg_required;
+		}
+	}
+
+	reiserfs_warning(s, "bad value \"%s\" for option \"%s\"", p,
+			 opt->option_name);
+	return -1;
+}
+
+/* returns 0 if something is wrong in option string, 1 - otherwise */
+static int reiserfs_parse_options(struct super_block *s, char *options,	/* string given via mount's -o */
+				  unsigned long *mount_options,
+				  /* after the parsing phase, contains the
+				     collection of bitflags defining what
+				     mount options were selected. */
+				  unsigned long *blocks,	/* strtol-ed from NNN of resize=NNN */
+				  char **jdev_name,
+				  unsigned int *commit_max_age,
+				  char **qf_names,
+				  unsigned int *qfmt)
+{
+	int c;
+	char *arg = NULL;
+	char *pos;
+	opt_desc_t opts[] = {
+		/* Compatibility stuff, so that -o notail for old setups still work */
+		{"tails",.arg_required = 't',.values = tails},
+		{"notail",.clrmask =
+		 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
+		{"conv",.setmask = 1 << REISERFS_CONVERT},
+		{"attrs",.setmask = 1 << REISERFS_ATTRS},
+		{"noattrs",.clrmask = 1 << REISERFS_ATTRS},
+#ifdef CONFIG_REISERFS_FS_XATTR
+		{"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
+		{"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
+#else
+		{"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
+		{"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
+#endif
+#ifdef CONFIG_REISERFS_FS_POSIX_ACL
+		{"acl",.setmask = 1 << REISERFS_POSIXACL},
+		{"noacl",.clrmask = 1 << REISERFS_POSIXACL},
+#else
+		{"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
+		{"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
+#endif
+		{.option_name = "nolog"},
+		{"replayonly",.setmask = 1 << REPLAYONLY},
+		{"block-allocator",.arg_required = 'a',.values = balloc},
+		{"data",.arg_required = 'd',.values = logging_mode},
+		{"barrier",.arg_required = 'b',.values = barrier_mode},
+		{"resize",.arg_required = 'r',.values = NULL},
+		{"jdev",.arg_required = 'j',.values = NULL},
+		{"nolargeio",.arg_required = 'w',.values = NULL},
+		{"commit",.arg_required = 'c',.values = NULL},
+		{"usrquota",.setmask = 1 << REISERFS_QUOTA},
+		{"grpquota",.setmask = 1 << REISERFS_QUOTA},
+		{"noquota",.clrmask = 1 << REISERFS_QUOTA},
+		{"errors",.arg_required = 'e',.values = error_actions},
+		{"usrjquota",.arg_required =
+		 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
+		{"grpjquota",.arg_required =
+		 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
+		{"jqfmt",.arg_required = 'f',.values = NULL},
+		{.option_name = NULL}
+	};
+
+	*blocks = 0;
+	if (!options || !*options)
+		/* use default configuration: create tails, journaling on, no
+		   conversion to newest format */
+		return 1;
+
+	for (pos = options; pos;) {
+		c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
+		if (c == -1)
+			/* wrong option is given */
+			return 0;
+
+		if (c == 'r') {
+			char *p;
+
+			p = NULL;
+			/* "resize=NNN" or "resize=auto" */
+
+			if (!strcmp(arg, "auto")) {
+				/* From JFS code, to auto-get the size. */
+				*blocks =
+				    s->s_bdev->bd_inode->i_size >> s->
+				    s_blocksize_bits;
+			} else {
+				*blocks = simple_strtoul(arg, &p, 0);
+				if (*p != '\0') {
+					/* NNN does not look like a number */
+					reiserfs_warning(s,
+							 "reiserfs_parse_options: bad value %s",
+							 arg);
+					return 0;
+				}
+			}
+		}
+
+		if (c == 'c') {
+			char *p = NULL;
+			unsigned long val = simple_strtoul(arg, &p, 0);
+			/* commit=NNN (time in seconds) */
+			if (*p != '\0' || val >= (unsigned int)-1) {
+				reiserfs_warning(s,
+						 "reiserfs_parse_options: bad value %s",
+						 arg);
+				return 0;
+			}
+			*commit_max_age = (unsigned int)val;
+		}
+
+		if (c == 'w') {
+			reiserfs_warning(s, "reiserfs: nolargeio option is no longer supported");
+			return 0;
+		}
+
+		if (c == 'j') {
+			if (arg && *arg && jdev_name) {
+				if (*jdev_name) {	//Hm, already assigned?
+					reiserfs_warning(s,
+							 "reiserfs_parse_options: journal device was already  specified to be %s",
+							 *jdev_name);
+					return 0;
+				}
+				*jdev_name = arg;
+			}
+		}
+#ifdef CONFIG_QUOTA
+		if (c == 'u' || c == 'g') {
+			int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
+
+			if ((sb_any_quota_enabled(s) ||
+			     sb_any_quota_suspended(s)) &&
+			    (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
+				reiserfs_warning(s,
+						 "reiserfs_parse_options: cannot change journaled quota options when quota turned on.");
+				return 0;
+			}
+			if (*arg) {	/* Some filename specified? */
+				if (REISERFS_SB(s)->s_qf_names[qtype]
+				    && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
+					      arg)) {
+					reiserfs_warning(s,
+							 "reiserfs_parse_options: %s quota file already specified.",
+							 QTYPE2NAME(qtype));
+					return 0;
+				}
+				if (strchr(arg, '/')) {
+					reiserfs_warning(s,
+							 "reiserfs_parse_options: quotafile must be on filesystem root.");
+					return 0;
+				}
+				qf_names[qtype] =
+				    kmalloc(strlen(arg) + 1, GFP_KERNEL);
+				if (!qf_names[qtype]) {
+					reiserfs_warning(s,
+							 "reiserfs_parse_options: not enough memory for storing quotafile name.");
+					return 0;
+				}
+				strcpy(qf_names[qtype], arg);
+				*mount_options |= 1 << REISERFS_QUOTA;
+			} else {
+				if (qf_names[qtype] !=
+				    REISERFS_SB(s)->s_qf_names[qtype])
+					kfree(qf_names[qtype]);
+				qf_names[qtype] = NULL;
+			}
+		}
+		if (c == 'f') {
+			if (!strcmp(arg, "vfsold"))
+				*qfmt = QFMT_VFS_OLD;
+			else if (!strcmp(arg, "vfsv0"))
+				*qfmt = QFMT_VFS_V0;
+			else {
+				reiserfs_warning(s,
+						 "reiserfs_parse_options: unknown quota format specified.");
+				return 0;
+			}
+			if ((sb_any_quota_enabled(s) ||
+			     sb_any_quota_suspended(s)) &&
+			    *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
+				reiserfs_warning(s,
+						 "reiserfs_parse_options: cannot change journaled quota options when quota turned on.");
+				return 0;
+			}
+		}
+#else
+		if (c == 'u' || c == 'g' || c == 'f') {
+			reiserfs_warning(s,
+					 "reiserfs_parse_options: journaled quota options not supported.");
+			return 0;
+		}
+#endif
+	}
+
+#ifdef CONFIG_QUOTA
+	if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
+	    && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
+		reiserfs_warning(s,
+				 "reiserfs_parse_options: journaled quota format not specified.");
+		return 0;
+	}
+	/* This checking is not precise wrt the quota type but for our purposes it is sufficient */
+	if (!(*mount_options & (1 << REISERFS_QUOTA))
+	    && sb_any_quota_enabled(s)) {
+		reiserfs_warning(s,
+				 "reiserfs_parse_options: quota options must be present when quota is turned on.");
+		return 0;
+	}
+#endif
+
+	return 1;
+}
+
+static void switch_data_mode(struct super_block *s, unsigned long mode)
+{
+	REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
+					 (1 << REISERFS_DATA_ORDERED) |
+					 (1 << REISERFS_DATA_WRITEBACK));
+	REISERFS_SB(s)->s_mount_opt |= (1 << mode);
+}
+
+static void handle_data_mode(struct super_block *s, unsigned long mount_options)
+{
+	if (mount_options & (1 << REISERFS_DATA_LOG)) {
+		if (!reiserfs_data_log(s)) {
+			switch_data_mode(s, REISERFS_DATA_LOG);
+			reiserfs_info(s, "switching to journaled data mode\n");
+		}
+	} else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
+		if (!reiserfs_data_ordered(s)) {
+			switch_data_mode(s, REISERFS_DATA_ORDERED);
+			reiserfs_info(s, "switching to ordered data mode\n");
+		}
+	} else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
+		if (!reiserfs_data_writeback(s)) {
+			switch_data_mode(s, REISERFS_DATA_WRITEBACK);
+			reiserfs_info(s, "switching to writeback data mode\n");
+		}
+	}
+}
+
+static void handle_barrier_mode(struct super_block *s, unsigned long bits)
+{
+	int flush = (1 << REISERFS_BARRIER_FLUSH);
+	int none = (1 << REISERFS_BARRIER_NONE);
+	int all_barrier = flush | none;
+
+	if (bits & all_barrier) {
+		REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
+		if (bits & flush) {
+			REISERFS_SB(s)->s_mount_opt |= flush;
+			printk("reiserfs: enabling write barrier flush mode\n");
+		} else if (bits & none) {
+			REISERFS_SB(s)->s_mount_opt |= none;
+			printk("reiserfs: write barriers turned off\n");
+		}
+	}
+}
+
+static void handle_attrs(struct super_block *s)
+{
+	struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
+
+	if (reiserfs_attrs(s)) {
+		if (old_format_only(s)) {
+			reiserfs_warning(s,
+					 "reiserfs: cannot support attributes on 3.5.x disk format");
+			REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
+			return;
+		}
+		if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
+			reiserfs_warning(s,
+					 "reiserfs: cannot support attributes until flag is set in super-block");
+			REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
+		}
+	}
+}
+
+#ifdef CONFIG_QUOTA
+static void handle_quota_files(struct super_block *s, char **qf_names,
+			       unsigned int *qfmt)
+{
+	int i;
+
+	for (i = 0; i < MAXQUOTAS; i++) {
+		if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
+			kfree(REISERFS_SB(s)->s_qf_names[i]);
+		REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
+	}
+	REISERFS_SB(s)->s_jquota_fmt = *qfmt;
+}
+#endif
+
+static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
+{
+	struct reiserfs_super_block *rs;
+	struct reiserfs_transaction_handle th;
+	unsigned long blocks;
+	unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
+	unsigned long safe_mask = 0;
+	unsigned int commit_max_age = (unsigned int)-1;
+	struct reiserfs_journal *journal = SB_JOURNAL(s);
+	char *new_opts = kstrdup(arg, GFP_KERNEL);
+	int err;
+	char *qf_names[MAXQUOTAS];
+	unsigned int qfmt = 0;
+#ifdef CONFIG_QUOTA
+	int i;
+
+	memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
+#endif
+
+	rs = SB_DISK_SUPER_BLOCK(s);
+
+	if (!reiserfs_parse_options
+	    (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
+	    qf_names, &qfmt)) {
+#ifdef CONFIG_QUOTA
+		for (i = 0; i < MAXQUOTAS; i++)
+			if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
+				kfree(qf_names[i]);
+#endif
+		err = -EINVAL;
+		goto out_err;
+	}
+#ifdef CONFIG_QUOTA
+	handle_quota_files(s, qf_names, &qfmt);
+#endif
+
+	handle_attrs(s);
+
+	/* Add options that are safe here */
+	safe_mask |= 1 << REISERFS_SMALLTAIL;
+	safe_mask |= 1 << REISERFS_LARGETAIL;
+	safe_mask |= 1 << REISERFS_NO_BORDER;
+	safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
+	safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
+	safe_mask |= 1 << REISERFS_TEST4;
+	safe_mask |= 1 << REISERFS_ATTRS;
+	safe_mask |= 1 << REISERFS_XATTRS_USER;
+	safe_mask |= 1 << REISERFS_POSIXACL;
+	safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
+	safe_mask |= 1 << REISERFS_BARRIER_NONE;
+	safe_mask |= 1 << REISERFS_ERROR_RO;
+	safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
+	safe_mask |= 1 << REISERFS_ERROR_PANIC;
+	safe_mask |= 1 << REISERFS_QUOTA;
+
+	/* Update the bitmask, taking care to keep
+	 * the bits we're not allowed to change here */
+	REISERFS_SB(s)->s_mount_opt =
+	    (REISERFS_SB(s)->
+	     s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
+
+	if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
+		journal->j_max_commit_age = commit_max_age;
+		journal->j_max_trans_age = commit_max_age;
+	} else if (commit_max_age == 0) {
+		/* 0 means restore defaults. */
+		journal->j_max_commit_age = journal->j_default_max_commit_age;
+		journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
+	}
+
+	if (blocks) {
+		err = reiserfs_resize(s, blocks);
+		if (err != 0)
+			goto out_err;
+	}
+
+	if (*mount_flags & MS_RDONLY) {
+		reiserfs_xattr_init(s, *mount_flags);
+		/* remount read-only */
+		if (s->s_flags & MS_RDONLY)
+			/* it is read-only already */
+			goto out_ok;
+		/* try to remount file system with read-only permissions */
+		if (sb_umount_state(rs) == REISERFS_VALID_FS
+		    || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
+			goto out_ok;
+		}
+
+		err = journal_begin(&th, s, 10);
+		if (err)
+			goto out_err;
+
+		/* Mounting a rw partition read-only. */
+		reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
+		set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
+		journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
+	} else {
+		/* remount read-write */
+		if (!(s->s_flags & MS_RDONLY)) {
+			reiserfs_xattr_init(s, *mount_flags);
+			goto out_ok;	/* We are read-write already */
+		}
+
+		if (reiserfs_is_journal_aborted(journal)) {
+			err = journal->j_errno;
+			goto out_err;
+		}
+
+		handle_data_mode(s, mount_options);
+		handle_barrier_mode(s, mount_options);
+		REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
+		s->s_flags &= ~MS_RDONLY;	/* now it is safe to call journal_begin */
+		err = journal_begin(&th, s, 10);
+		if (err)
+			goto out_err;
+
+		/* Mount a partition which is read-only, read-write */
+		reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
+		REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
+		s->s_flags &= ~MS_RDONLY;
+		set_sb_umount_state(rs, REISERFS_ERROR_FS);
+		/* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
+		journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
+		REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
+	}
+	/* this will force a full flush of all journal lists */
+	SB_JOURNAL(s)->j_must_wait = 1;
+	err = journal_end(&th, s, 10);
+	if (err)
+		goto out_err;
+	s->s_dirt = 0;
+
+	if (!(*mount_flags & MS_RDONLY)) {
+		finish_unfinished(s);
+		reiserfs_xattr_init(s, *mount_flags);
+	}
+
+out_ok:
+	kfree(s->s_options);
+	s->s_options = new_opts;
+	return 0;
+
+out_err:
+	kfree(new_opts);
+	return err;
+}
+
+static int read_super_block(struct super_block *s, int offset)
+{
+	struct buffer_head *bh;
+	struct reiserfs_super_block *rs;
+	int fs_blocksize;
+
+	bh = sb_bread(s, offset / s->s_blocksize);
+	if (!bh) {
+		reiserfs_warning(s, "sh-2006: read_super_block: "
+				 "bread failed (dev %s, block %lu, size %lu)",
+				 reiserfs_bdevname(s), offset / s->s_blocksize,
+				 s->s_blocksize);
+		return 1;
+	}
+
+	rs = (struct reiserfs_super_block *)bh->b_data;
+	if (!is_any_reiserfs_magic_string(rs)) {
+		brelse(bh);
+		return 1;
+	}
+	//
+	// ok, reiserfs signature (old or new) found in at the given offset
+	//    
+	fs_blocksize = sb_blocksize(rs);
+	brelse(bh);
+	sb_set_blocksize(s, fs_blocksize);
+
+	bh = sb_bread(s, offset / s->s_blocksize);
+	if (!bh) {
+		reiserfs_warning(s, "sh-2007: read_super_block: "
+				 "bread failed (dev %s, block %lu, size %lu)\n",
+				 reiserfs_bdevname(s), offset / s->s_blocksize,
+				 s->s_blocksize);
+		return 1;
+	}
+
+	rs = (struct reiserfs_super_block *)bh->b_data;
+	if (sb_blocksize(rs) != s->s_blocksize) {
+		reiserfs_warning(s, "sh-2011: read_super_block: "
+				 "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n",
+				 reiserfs_bdevname(s),
+				 (unsigned long long)bh->b_blocknr,
+				 s->s_blocksize);
+		brelse(bh);
+		return 1;
+	}
+
+	if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
+		brelse(bh);
+		reiserfs_warning(s,
+				 "Unfinished reiserfsck --rebuild-tree run detected. Please run\n"
+				 "reiserfsck --rebuild-tree and wait for a completion. If that fails\n"
+				 "get newer reiserfsprogs package");
+		return 1;
+	}
+
+	SB_BUFFER_WITH_SB(s) = bh;
+	SB_DISK_SUPER_BLOCK(s) = rs;
+
+	if (is_reiserfs_jr(rs)) {
+		/* magic is of non-standard journal filesystem, look at s_version to
+		   find which format is in use */
+		if (sb_version(rs) == REISERFS_VERSION_2)
+			reiserfs_warning(s,
+					 "read_super_block: found reiserfs format \"3.6\""
+					 " with non-standard journal");
+		else if (sb_version(rs) == REISERFS_VERSION_1)
+			reiserfs_warning(s,
+					 "read_super_block: found reiserfs format \"3.5\""
+					 " with non-standard journal");
+		else {
+			reiserfs_warning(s,
+					 "sh-2012: read_super_block: found unknown "
+					 "format \"%u\" of reiserfs with non-standard magic",
+					 sb_version(rs));
+			return 1;
+		}
+	} else
+		/* s_version of standard format may contain incorrect information,
+		   so we just look at the magic string */
+		reiserfs_info(s,
+			      "found reiserfs format \"%s\" with standard journal\n",
+			      is_reiserfs_3_5(rs) ? "3.5" : "3.6");
+
+	s->s_op = &reiserfs_sops;
+	s->s_export_op = &reiserfs_export_ops;
+#ifdef CONFIG_QUOTA
+	s->s_qcop = &reiserfs_qctl_operations;
+	s->dq_op = &reiserfs_quota_operations;
+#endif
+
+	/* new format is limited by the 32 bit wide i_blocks field, want to
+	 ** be one full block below that.
+	 */
+	s->s_maxbytes = (512LL << 32) - s->s_blocksize;
+	return 0;
+}
+
+/* after journal replay, reread all bitmap and super blocks */
+static int reread_meta_blocks(struct super_block *s)
+{
+	ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
+	wait_on_buffer(SB_BUFFER_WITH_SB(s));
+	if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
+		reiserfs_warning(s,
+				 "reread_meta_blocks, error reading the super");
+		return 1;
+	}
+
+	return 0;
+}
+
+/////////////////////////////////////////////////////
+// hash detection stuff
+
+// if root directory is empty - we set default - Yura's - hash and
+// warn about it
+// FIXME: we look for only one name in a directory. If tea and yura
+// bith have the same value - we ask user to send report to the
+// mailing list
+static __u32 find_hash_out(struct super_block *s)
+{
+	int retval;
+	struct inode *inode;
+	struct cpu_key key;
+	INITIALIZE_PATH(path);
+	struct reiserfs_dir_entry de;
+	__u32 hash = DEFAULT_HASH;
+
+	inode = s->s_root->d_inode;
+
+	do {			// Some serious "goto"-hater was there ;)
+		u32 teahash, r5hash, yurahash;
+
+		make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
+		retval = search_by_entry_key(s, &key, &path, &de);
+		if (retval == IO_ERROR) {
+			pathrelse(&path);
+			return UNSET_HASH;
+		}
+		if (retval == NAME_NOT_FOUND)
+			de.de_entry_num--;
+		set_de_name_and_namelen(&de);
+		if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
+			/* allow override in this case */
+			if (reiserfs_rupasov_hash(s)) {
+				hash = YURA_HASH;
+			}
+			reiserfs_warning(s, "FS seems to be empty, autodetect "
+					 "is using the default hash");
+			break;
+		}
+		r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
+		teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
+		yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
+		if (((teahash == r5hash)
+		     &&
+		     (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
+		      == r5hash)) || ((teahash == yurahash)
+				      && (yurahash ==
+					  GET_HASH_VALUE(deh_offset
+							 (&
+							  (de.
+							   de_deh[de.
+								  de_entry_num])))))
+		    || ((r5hash == yurahash)
+			&& (yurahash ==
+			    GET_HASH_VALUE(deh_offset
+					   (&(de.de_deh[de.de_entry_num])))))) {
+			reiserfs_warning(s,
+					 "Unable to automatically detect hash function. "
+					 "Please mount with -o hash={tea,rupasov,r5}",
+					 reiserfs_bdevname(s));
+			hash = UNSET_HASH;
+			break;
+		}
+		if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
+		    yurahash)
+			hash = YURA_HASH;
+		else if (GET_HASH_VALUE
+			 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
+			hash = TEA_HASH;
+		else if (GET_HASH_VALUE
+			 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
+			hash = R5_HASH;
+		else {
+			reiserfs_warning(s, "Unrecognised hash function");
+			hash = UNSET_HASH;
+		}
+	} while (0);
+
+	pathrelse(&path);
+	return hash;
+}
+
+// finds out which hash names are sorted with
+static int what_hash(struct super_block *s)
+{
+	__u32 code;
+
+	code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
+
+	/* reiserfs_hash_detect() == true if any of the hash mount options
+	 ** were used.  We must check them to make sure the user isn't
+	 ** using a bad hash value
+	 */
+	if (code == UNSET_HASH || reiserfs_hash_detect(s))
+		code = find_hash_out(s);
+
+	if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
+		/* detection has found the hash, and we must check against the 
+		 ** mount options 
+		 */
+		if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
+			reiserfs_warning(s, "Error, %s hash detected, "
+					 "unable to force rupasov hash",
+					 reiserfs_hashname(code));
+			code = UNSET_HASH;
+		} else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
+			reiserfs_warning(s, "Error, %s hash detected, "
+					 "unable to force tea hash",
+					 reiserfs_hashname(code));
+			code = UNSET_HASH;
+		} else if (reiserfs_r5_hash(s) && code != R5_HASH) {
+			reiserfs_warning(s, "Error, %s hash detected, "
+					 "unable to force r5 hash",
+					 reiserfs_hashname(code));
+			code = UNSET_HASH;
+		}
+	} else {
+		/* find_hash_out was not called or could not determine the hash */
+		if (reiserfs_rupasov_hash(s)) {
+			code = YURA_HASH;
+		} else if (reiserfs_tea_hash(s)) {
+			code = TEA_HASH;
+		} else if (reiserfs_r5_hash(s)) {
+			code = R5_HASH;
+		}
+	}
+
+	/* if we are mounted RW, and we have a new valid hash code, update 
+	 ** the super
+	 */
+	if (code != UNSET_HASH &&
+	    !(s->s_flags & MS_RDONLY) &&
+	    code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
+		set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
+	}
+	return code;
+}
+
+// return pointer to appropriate function
+static hashf_t hash_function(struct super_block *s)
+{
+	switch (what_hash(s)) {
+	case TEA_HASH:
+		reiserfs_info(s, "Using tea hash to sort names\n");
+		return keyed_hash;
+	case YURA_HASH:
+		reiserfs_info(s, "Using rupasov hash to sort names\n");
+		return yura_hash;
+	case R5_HASH:
+		reiserfs_info(s, "Using r5 hash to sort names\n");
+		return r5_hash;
+	}
+	return NULL;
+}
+
+// this is used to set up correct value for old partitions
+static int function2code(hashf_t func)
+{
+	if (func == keyed_hash)
+		return TEA_HASH;
+	if (func == yura_hash)
+		return YURA_HASH;
+	if (func == r5_hash)
+		return R5_HASH;
+
+	BUG();			// should never happen
+
+	return 0;
+}
+
+#define SWARN(silent, s, ...)			\
+	if (!(silent))				\
+		reiserfs_warning (s, __VA_ARGS__)
+
+static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
+{
+	struct inode *root_inode;
+	struct reiserfs_transaction_handle th;
+	int old_format = 0;
+	unsigned long blocks;
+	unsigned int commit_max_age = 0;
+	int jinit_done = 0;
+	struct reiserfs_iget_args args;
+	struct reiserfs_super_block *rs;
+	char *jdev_name;
+	struct reiserfs_sb_info *sbi;
+	int errval = -EINVAL;
+	char *qf_names[MAXQUOTAS] = {};
+	unsigned int qfmt = 0;
+
+	save_mount_options(s, data);
+
+	sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
+	if (!sbi) {
+		errval = -ENOMEM;
+		goto error;
+	}
+	s->s_fs_info = sbi;
+	/* Set default values for options: non-aggressive tails, RO on errors */
+	REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
+	REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
+	/* no preallocation minimum, be smart in
+	   reiserfs_file_write instead */
+	REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
+	/* Preallocate by 16 blocks (17-1) at once */
+	REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
+#ifdef CONFIG_REISERFS_FS_XATTR
+	/* Initialize the rwsem for xattr dir */
+	init_rwsem(&REISERFS_SB(s)->xattr_dir_sem);
+#endif
+	/* setup default block allocator options */
+	reiserfs_init_alloc_options(s);
+
+	jdev_name = NULL;
+	if (reiserfs_parse_options
+	    (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
+	     &commit_max_age, qf_names, &qfmt) == 0) {
+		goto error;
+	}
+#ifdef CONFIG_QUOTA
+	handle_quota_files(s, qf_names, &qfmt);
+#endif
+
+	if (blocks) {
+		SWARN(silent, s, "jmacd-7: reiserfs_fill_super: resize option "
+		      "for remount only");
+		goto error;
+	}
+
+	/* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
+	if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
+		old_format = 1;
+	/* try new format (64-th 1k block), which can contain reiserfs super block */
+	else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
+		SWARN(silent, s,
+		      "sh-2021: reiserfs_fill_super: can not find reiserfs on %s",
+		      reiserfs_bdevname(s));
+		goto error;
+	}
+
+	rs = SB_DISK_SUPER_BLOCK(s);
+	/* Let's do basic sanity check to verify that underlying device is not
+	   smaller than the filesystem. If the check fails then abort and scream,
+	   because bad stuff will happen otherwise. */
+	if (s->s_bdev && s->s_bdev->bd_inode
+	    && i_size_read(s->s_bdev->bd_inode) <
+	    sb_block_count(rs) * sb_blocksize(rs)) {
+		SWARN(silent, s,
+		      "Filesystem on %s cannot be mounted because it is bigger than the device",
+		      reiserfs_bdevname(s));
+		SWARN(silent, s,
+		      "You may need to run fsck or increase size of your LVM partition");
+		SWARN(silent, s,
+		      "Or may be you forgot to reboot after fdisk when it told you to");
+		goto error;
+	}
+
+	sbi->s_mount_state = SB_REISERFS_STATE(s);
+	sbi->s_mount_state = REISERFS_VALID_FS;
+
+	if ((errval = reiserfs_init_bitmap_cache(s))) {
+		SWARN(silent, s,
+		      "jmacd-8: reiserfs_fill_super: unable to read bitmap");
+		goto error;
+	}
+	errval = -EINVAL;
+#ifdef CONFIG_REISERFS_CHECK
+	SWARN(silent, s, "CONFIG_REISERFS_CHECK is set ON");
+	SWARN(silent, s, "- it is slow mode for debugging.");
+#endif
+
+	/* make data=ordered the default */
+	if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
+	    !reiserfs_data_writeback(s)) {
+		REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
+	}
+
+	if (reiserfs_data_log(s)) {
+		reiserfs_info(s, "using journaled data mode\n");
+	} else if (reiserfs_data_ordered(s)) {
+		reiserfs_info(s, "using ordered data mode\n");
+	} else {
+		reiserfs_info(s, "using writeback data mode\n");
+	}
+	if (reiserfs_barrier_flush(s)) {
+		printk("reiserfs: using flush barriers\n");
+	}
+	// set_device_ro(s->s_dev, 1) ;
+	if (journal_init(s, jdev_name, old_format, commit_max_age)) {
+		SWARN(silent, s,
+		      "sh-2022: reiserfs_fill_super: unable to initialize journal space");
+		goto error;
+	} else {
+		jinit_done = 1;	/* once this is set, journal_release must be called
+				 ** if we error out of the mount
+				 */
+	}
+	if (reread_meta_blocks(s)) {
+		SWARN(silent, s,
+		      "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init");
+		goto error;
+	}
+
+	if (replay_only(s))
+		goto error;
+
+	if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
+		SWARN(silent, s,
+		      "clm-7000: Detected readonly device, marking FS readonly");
+		s->s_flags |= MS_RDONLY;
+	}
+	args.objectid = REISERFS_ROOT_OBJECTID;
+	args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
+	root_inode =
+	    iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
+			 reiserfs_init_locked_inode, (void *)(&args));
+	if (!root_inode) {
+		SWARN(silent, s,
+		      "jmacd-10: reiserfs_fill_super: get root inode failed");
+		goto error;
+	}
+
+	if (root_inode->i_state & I_NEW) {
+		reiserfs_read_locked_inode(root_inode, &args);
+		unlock_new_inode(root_inode);
+	}
+
+	s->s_root = d_alloc_root(root_inode);
+	if (!s->s_root) {
+		iput(root_inode);
+		goto error;
+	}
+	// define and initialize hash function
+	sbi->s_hash_function = hash_function(s);
+	if (sbi->s_hash_function == NULL) {
+		dput(s->s_root);
+		s->s_root = NULL;
+		goto error;
+	}
+
+	if (is_reiserfs_3_5(rs)
+	    || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
+		set_bit(REISERFS_3_5, &(sbi->s_properties));
+	else if (old_format)
+		set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
+	else
+		set_bit(REISERFS_3_6, &(sbi->s_properties));
+
+	if (!(s->s_flags & MS_RDONLY)) {
+
+		errval = journal_begin(&th, s, 1);
+		if (errval) {
+			dput(s->s_root);
+			s->s_root = NULL;
+			goto error;
+		}
+		reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
+
+		set_sb_umount_state(rs, REISERFS_ERROR_FS);
+		set_sb_fs_state(rs, 0);
+
+		/* Clear out s_bmap_nr if it would wrap. We can handle this
+		 * case, but older revisions can't. This will cause the
+		 * file system to fail mount on those older implementations,
+		 * avoiding corruption. -jeffm */
+		if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
+		    sb_bmap_nr(rs) != 0) {
+			reiserfs_warning(s, "super-2030: This file system "
+					"claims to use %u bitmap blocks in "
+					"its super block, but requires %u. "
+					"Clearing to zero.", sb_bmap_nr(rs),
+					reiserfs_bmap_count(s));
+
+			set_sb_bmap_nr(rs, 0);
+		}
+
+		if (old_format_only(s)) {
+			/* filesystem of format 3.5 either with standard or non-standard
+			   journal */
+			if (convert_reiserfs(s)) {
+				/* and -o conv is given */
+				if (!silent)
+					reiserfs_info(s,
+						      "converting 3.5 filesystem to the 3.6 format");
+
+				if (is_reiserfs_3_5(rs))
+					/* put magic string of 3.6 format. 2.2 will not be able to
+					   mount this filesystem anymore */
+					memcpy(rs->s_v1.s_magic,
+					       reiserfs_3_6_magic_string,
+					       sizeof
+					       (reiserfs_3_6_magic_string));
+
+				set_sb_version(rs, REISERFS_VERSION_2);
+				reiserfs_convert_objectid_map_v1(s);
+				set_bit(REISERFS_3_6, &(sbi->s_properties));
+				clear_bit(REISERFS_3_5, &(sbi->s_properties));
+			} else if (!silent) {
+				reiserfs_info(s, "using 3.5.x disk format\n");
+			}
+		}
+
+		journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
+		errval = journal_end(&th, s, 1);
+		if (errval) {
+			dput(s->s_root);
+			s->s_root = NULL;
+			goto error;
+		}
+
+		if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
+			dput(s->s_root);
+			s->s_root = NULL;
+			goto error;
+		}
+
+		/* look for files which were to be removed in previous session */
+		finish_unfinished(s);
+	} else {
+		if (old_format_only(s) && !silent) {
+			reiserfs_info(s, "using 3.5.x disk format\n");
+		}
+
+		if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
+			dput(s->s_root);
+			s->s_root = NULL;
+			goto error;
+		}
+	}
+	// mark hash in super block: it could be unset. overwrite should be ok
+	set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
+
+	handle_attrs(s);
+
+	reiserfs_proc_info_init(s);
+
+	init_waitqueue_head(&(sbi->s_wait));
+	spin_lock_init(&sbi->bitmap_lock);
+
+	return (0);
+
+error:
+	if (jinit_done) {	/* kill the commit thread, free journal ram */
+		journal_release_error(NULL, s);
+	}
+
+	reiserfs_free_bitmap_cache(s);
+	if (SB_BUFFER_WITH_SB(s))
+		brelse(SB_BUFFER_WITH_SB(s));
+#ifdef CONFIG_QUOTA
+	{
+		int j;
+		for (j = 0; j < MAXQUOTAS; j++)
+			kfree(qf_names[j]);
+	}
+#endif
+	kfree(sbi);
+
+	s->s_fs_info = NULL;
+	return errval;
+}
+
+static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+	struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
+
+	buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
+	buf->f_bfree = sb_free_blocks(rs);
+	buf->f_bavail = buf->f_bfree;
+	buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
+	buf->f_bsize = dentry->d_sb->s_blocksize;
+	/* changed to accommodate gcc folks. */
+	buf->f_type = REISERFS_SUPER_MAGIC;
+	return 0;
+}
+
+#ifdef CONFIG_QUOTA
+static int reiserfs_dquot_initialize(struct inode *inode, int type)
+{
+	struct reiserfs_transaction_handle th;
+	int ret, err;
+
+	/* We may create quota structure so we need to reserve enough blocks */
+	reiserfs_write_lock(inode->i_sb);
+	ret =
+	    journal_begin(&th, inode->i_sb,
+			  2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
+	if (ret)
+		goto out;
+	ret = dquot_initialize(inode, type);
+	err =
+	    journal_end(&th, inode->i_sb,
+			2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
+	if (!ret && err)
+		ret = err;
+      out:
+	reiserfs_write_unlock(inode->i_sb);
+	return ret;
+}
+
+static int reiserfs_dquot_drop(struct inode *inode)
+{
+	struct reiserfs_transaction_handle th;
+	int ret, err;
+
+	/* We may delete quota structure so we need to reserve enough blocks */
+	reiserfs_write_lock(inode->i_sb);
+	ret =
+	    journal_begin(&th, inode->i_sb,
+			  2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
+	if (ret) {
+		/*
+		 * We call dquot_drop() anyway to at least release references
+		 * to quota structures so that umount does not hang.
+		 */
+		dquot_drop(inode);
+		goto out;
+	}
+	ret = dquot_drop(inode);
+	err =
+	    journal_end(&th, inode->i_sb,
+			2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
+	if (!ret && err)
+		ret = err;
+      out:
+	reiserfs_write_unlock(inode->i_sb);
+	return ret;
+}
+
+static int reiserfs_write_dquot(struct dquot *dquot)
+{
+	struct reiserfs_transaction_handle th;
+	int ret, err;
+
+	reiserfs_write_lock(dquot->dq_sb);
+	ret =
+	    journal_begin(&th, dquot->dq_sb,
+			  REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
+	if (ret)
+		goto out;
+	ret = dquot_commit(dquot);
+	err =
+	    journal_end(&th, dquot->dq_sb,
+			REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
+	if (!ret && err)
+		ret = err;
+      out:
+	reiserfs_write_unlock(dquot->dq_sb);
+	return ret;
+}
+
+static int reiserfs_acquire_dquot(struct dquot *dquot)
+{
+	struct reiserfs_transaction_handle th;
+	int ret, err;
+
+	reiserfs_write_lock(dquot->dq_sb);
+	ret =
+	    journal_begin(&th, dquot->dq_sb,
+			  REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
+	if (ret)
+		goto out;
+	ret = dquot_acquire(dquot);
+	err =
+	    journal_end(&th, dquot->dq_sb,
+			REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
+	if (!ret && err)
+		ret = err;
+      out:
+	reiserfs_write_unlock(dquot->dq_sb);
+	return ret;
+}
+
+static int reiserfs_release_dquot(struct dquot *dquot)
+{
+	struct reiserfs_transaction_handle th;
+	int ret, err;
+
+	reiserfs_write_lock(dquot->dq_sb);
+	ret =
+	    journal_begin(&th, dquot->dq_sb,
+			  REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
+	if (ret) {
+		/* Release dquot anyway to avoid endless cycle in dqput() */
+		dquot_release(dquot);
+		goto out;
+	}
+	ret = dquot_release(dquot);
+	err =
+	    journal_end(&th, dquot->dq_sb,
+			REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
+	if (!ret && err)
+		ret = err;
+      out:
+	reiserfs_write_unlock(dquot->dq_sb);
+	return ret;
+}
+
+static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
+{
+	/* Are we journaling quotas? */
+	if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
+	    REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
+		dquot_mark_dquot_dirty(dquot);
+		return reiserfs_write_dquot(dquot);
+	} else
+		return dquot_mark_dquot_dirty(dquot);
+}
+
+static int reiserfs_write_info(struct super_block *sb, int type)
+{
+	struct reiserfs_transaction_handle th;
+	int ret, err;
+
+	/* Data block + inode block */
+	reiserfs_write_lock(sb);
+	ret = journal_begin(&th, sb, 2);
+	if (ret)
+		goto out;
+	ret = dquot_commit_info(sb, type);
+	err = journal_end(&th, sb, 2);
+	if (!ret && err)
+		ret = err;
+      out:
+	reiserfs_write_unlock(sb);
+	return ret;
+}
+
+/*
+ * Turn on quotas during mount time - we need to find the quota file and such...
+ */
+static int reiserfs_quota_on_mount(struct super_block *sb, int type)
+{
+	return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
+				  REISERFS_SB(sb)->s_jquota_fmt, type);
+}
+
+/*
+ * Standard function to be called on quota_on
+ */
+static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
+			     char *name, int remount)
+{
+	int err;
+	struct path path;
+	struct inode *inode;
+	struct reiserfs_transaction_handle th;
+
+	if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
+		return -EINVAL;
+	/* No more checks needed? Path and format_id are bogus anyway... */
+	if (remount)
+		return vfs_quota_on(sb, type, format_id, name, 1);
+	err = kern_path(name, LOOKUP_FOLLOW, &path);
+	if (err)
+		return err;
+	/* Quotafile not on the same filesystem? */
+	if (path.mnt->mnt_sb != sb) {
+		err = -EXDEV;
+		goto out;
+	}
+	inode = path.dentry->d_inode;
+	/* We must not pack tails for quota files on reiserfs for quota IO to work */
+	if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
+		err = reiserfs_unpack(inode, NULL);
+		if (err) {
+			reiserfs_warning(sb,
+				"reiserfs: Unpacking tail of quota file failed"
+				" (%d). Cannot turn on quotas.", err);
+			err = -EINVAL;
+			goto out;
+		}
+		mark_inode_dirty(inode);
+	}
+	/* Journaling quota? */
+	if (REISERFS_SB(sb)->s_qf_names[type]) {
+		/* Quotafile not of fs root? */
+		if (path.dentry->d_parent != sb->s_root)
+			reiserfs_warning(sb,
+				 "reiserfs: Quota file not on filesystem root. "
+				 "Journalled quota will not work.");
+	}
+
+	/*
+	 * When we journal data on quota file, we have to flush journal to see
+	 * all updates to the file when we bypass pagecache...
+	 */
+	if (reiserfs_file_data_log(inode)) {
+		/* Just start temporary transaction and finish it */
+		err = journal_begin(&th, sb, 1);
+		if (err)
+			goto out;
+		err = journal_end_sync(&th, sb, 1);
+		if (err)
+			goto out;
+	}
+	err = vfs_quota_on_path(sb, type, format_id, &path);
+out:
+	path_put(&path);
+	return err;
+}
+
+/* Read data from quotafile - avoid pagecache and such because we cannot afford
+ * acquiring the locks... As quota files are never truncated and quota code
+ * itself serializes the operations (and noone else should touch the files)
+ * we don't have to be afraid of races */
+static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
+				   size_t len, loff_t off)
+{
+	struct inode *inode = sb_dqopt(sb)->files[type];
+	unsigned long blk = off >> sb->s_blocksize_bits;
+	int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
+	size_t toread;
+	struct buffer_head tmp_bh, *bh;
+	loff_t i_size = i_size_read(inode);
+
+	if (off > i_size)
+		return 0;
+	if (off + len > i_size)
+		len = i_size - off;
+	toread = len;
+	while (toread > 0) {
+		tocopy =
+		    sb->s_blocksize - offset <
+		    toread ? sb->s_blocksize - offset : toread;
+		tmp_bh.b_state = 0;
+		/* Quota files are without tails so we can safely use this function */
+		reiserfs_write_lock(sb);
+		err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
+		reiserfs_write_unlock(sb);
+		if (err)
+			return err;
+		if (!buffer_mapped(&tmp_bh))	/* A hole? */
+			memset(data, 0, tocopy);
+		else {
+			bh = sb_bread(sb, tmp_bh.b_blocknr);
+			if (!bh)
+				return -EIO;
+			memcpy(data, bh->b_data + offset, tocopy);
+			brelse(bh);
+		}
+		offset = 0;
+		toread -= tocopy;
+		data += tocopy;
+		blk++;
+	}
+	return len;
+}
+
+/* Write to quotafile (we know the transaction is already started and has
+ * enough credits) */
+static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
+				    const char *data, size_t len, loff_t off)
+{
+	struct inode *inode = sb_dqopt(sb)->files[type];
+	unsigned long blk = off >> sb->s_blocksize_bits;
+	int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
+	int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
+	size_t towrite = len;
+	struct buffer_head tmp_bh, *bh;
+
+	if (!current->journal_info) {
+		printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
+			" cancelled because transaction is not started.\n",
+			(unsigned long long)off, (unsigned long long)len);
+		return -EIO;
+	}
+	mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
+	while (towrite > 0) {
+		tocopy = sb->s_blocksize - offset < towrite ?
+		    sb->s_blocksize - offset : towrite;
+		tmp_bh.b_state = 0;
+		err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
+		if (err)
+			goto out;
+		if (offset || tocopy != sb->s_blocksize)
+			bh = sb_bread(sb, tmp_bh.b_blocknr);
+		else
+			bh = sb_getblk(sb, tmp_bh.b_blocknr);
+		if (!bh) {
+			err = -EIO;
+			goto out;
+		}
+		lock_buffer(bh);
+		memcpy(bh->b_data + offset, data, tocopy);
+		flush_dcache_page(bh->b_page);
+		set_buffer_uptodate(bh);
+		unlock_buffer(bh);
+		reiserfs_prepare_for_journal(sb, bh, 1);
+		journal_mark_dirty(current->journal_info, sb, bh);
+		if (!journal_quota)
+			reiserfs_add_ordered_list(inode, bh);
+		brelse(bh);
+		offset = 0;
+		towrite -= tocopy;
+		data += tocopy;
+		blk++;
+	}
+out:
+	if (len == towrite) {
+		mutex_unlock(&inode->i_mutex);
+		return err;
+	}
+	if (inode->i_size < off + len - towrite)
+		i_size_write(inode, off + len - towrite);
+	inode->i_version++;
+	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+	mark_inode_dirty(inode);
+	mutex_unlock(&inode->i_mutex);
+	return len - towrite;
+}
+
+#endif
+
+static int get_super_block(struct file_system_type *fs_type,
+			   int flags, const char *dev_name,
+			   void *data, struct vfsmount *mnt)
+{
+	return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super,
+			   mnt);
+}
+
+static int __init init_reiserfs_fs(void)
+{
+	int ret;
+
+	if ((ret = init_inodecache())) {
+		return ret;
+	}
+
+	if ((ret = reiserfs_xattr_register_handlers()))
+		goto failed_reiserfs_xattr_register_handlers;
+
+	reiserfs_proc_info_global_init();
+	reiserfs_proc_register_global("version",
+				      reiserfs_global_version_in_proc);
+
+	ret = register_filesystem(&reiserfs_fs_type);
+
+	if (ret == 0) {
+		return 0;
+	}
+
+	reiserfs_xattr_unregister_handlers();
+
+      failed_reiserfs_xattr_register_handlers:
+	reiserfs_proc_unregister_global("version");
+	reiserfs_proc_info_global_done();
+	destroy_inodecache();
+
+	return ret;
+}
+
+static void __exit exit_reiserfs_fs(void)
+{
+	reiserfs_xattr_unregister_handlers();
+	reiserfs_proc_unregister_global("version");
+	reiserfs_proc_info_global_done();
+	unregister_filesystem(&reiserfs_fs_type);
+	destroy_inodecache();
+}
+
+struct file_system_type reiserfs_fs_type = {
+	.owner = THIS_MODULE,
+	.name = "reiserfs",
+	.get_sb = get_super_block,
+	.kill_sb = reiserfs_kill_sb,
+	.fs_flags = FS_REQUIRES_DEV,
+};
+
+MODULE_DESCRIPTION("ReiserFS journaled filesystem");
+MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
+MODULE_LICENSE("GPL");
+
+module_init(init_reiserfs_fs);
+module_exit(exit_reiserfs_fs);
diff --git a/fs/reiserfs/tail_conversion.c b/fs/reiserfs/tail_conversion.c
new file mode 100644
index 0000000..f8121a1
--- /dev/null
+++ b/fs/reiserfs/tail_conversion.c
@@ -0,0 +1,278 @@
+/*
+ * Copyright 1999 Hans Reiser, see reiserfs/README for licensing and copyright details
+ */
+
+#include <linux/time.h>
+#include <linux/pagemap.h>
+#include <linux/buffer_head.h>
+#include <linux/reiserfs_fs.h>
+
+/* access to tail : when one is going to read tail it must make sure, that is not running.
+ direct2indirect and indirect2direct can not run concurrently */
+
+/* Converts direct items to an unformatted node. Panics if file has no
+   tail. -ENOSPC if no disk space for conversion */
+/* path points to first direct item of the file regarless of how many of
+   them are there */
+int direct2indirect(struct reiserfs_transaction_handle *th, struct inode *inode,
+		    struct treepath *path, struct buffer_head *unbh,
+		    loff_t tail_offset)
+{
+	struct super_block *sb = inode->i_sb;
+	struct buffer_head *up_to_date_bh;
+	struct item_head *p_le_ih = PATH_PITEM_HEAD(path);
+	unsigned long total_tail = 0;
+	struct cpu_key end_key;	/* Key to search for the last byte of the
+				   converted item. */
+	struct item_head ind_ih;	/* new indirect item to be inserted or
+					   key of unfm pointer to be pasted */
+	int n_blk_size, n_retval;	/* returned value for reiserfs_insert_item and clones */
+	unp_t unfm_ptr;		/* Handle on an unformatted node
+				   that will be inserted in the
+				   tree. */
+
+	BUG_ON(!th->t_trans_id);
+
+	REISERFS_SB(sb)->s_direct2indirect++;
+
+	n_blk_size = sb->s_blocksize;
+
+	/* and key to search for append or insert pointer to the new
+	   unformatted node. */
+	copy_item_head(&ind_ih, p_le_ih);
+	set_le_ih_k_offset(&ind_ih, tail_offset);
+	set_le_ih_k_type(&ind_ih, TYPE_INDIRECT);
+
+	/* Set the key to search for the place for new unfm pointer */
+	make_cpu_key(&end_key, inode, tail_offset, TYPE_INDIRECT, 4);
+
+	// FIXME: we could avoid this 
+	if (search_for_position_by_key(sb, &end_key, path) == POSITION_FOUND) {
+		reiserfs_warning(sb, "PAP-14030: direct2indirect: "
+				 "pasted or inserted byte exists in the tree %K. "
+				 "Use fsck to repair.", &end_key);
+		pathrelse(path);
+		return -EIO;
+	}
+
+	p_le_ih = PATH_PITEM_HEAD(path);
+
+	unfm_ptr = cpu_to_le32(unbh->b_blocknr);
+
+	if (is_statdata_le_ih(p_le_ih)) {
+		/* Insert new indirect item. */
+		set_ih_free_space(&ind_ih, 0);	/* delete at nearest future */
+		put_ih_item_len(&ind_ih, UNFM_P_SIZE);
+		PATH_LAST_POSITION(path)++;
+		n_retval =
+		    reiserfs_insert_item(th, path, &end_key, &ind_ih, inode,
+					 (char *)&unfm_ptr);
+	} else {
+		/* Paste into last indirect item of an object. */
+		n_retval = reiserfs_paste_into_item(th, path, &end_key, inode,
+						    (char *)&unfm_ptr,
+						    UNFM_P_SIZE);
+	}
+	if (n_retval) {
+		return n_retval;
+	}
+	// note: from here there are two keys which have matching first
+	// three key components. They only differ by the fourth one.
+
+	/* Set the key to search for the direct items of the file */
+	make_cpu_key(&end_key, inode, max_reiserfs_offset(inode), TYPE_DIRECT,
+		     4);
+
+	/* Move bytes from the direct items to the new unformatted node
+	   and delete them. */
+	while (1) {
+		int tail_size;
+
+		/* end_key.k_offset is set so, that we will always have found
+		   last item of the file */
+		if (search_for_position_by_key(sb, &end_key, path) ==
+		    POSITION_FOUND)
+			reiserfs_panic(sb,
+				       "PAP-14050: direct2indirect: "
+				       "direct item (%K) not found", &end_key);
+		p_le_ih = PATH_PITEM_HEAD(path);
+		RFALSE(!is_direct_le_ih(p_le_ih),
+		       "vs-14055: direct item expected(%K), found %h",
+		       &end_key, p_le_ih);
+		tail_size = (le_ih_k_offset(p_le_ih) & (n_blk_size - 1))
+		    + ih_item_len(p_le_ih) - 1;
+
+		/* we only send the unbh pointer if the buffer is not up to date.
+		 ** this avoids overwriting good data from writepage() with old data
+		 ** from the disk or buffer cache
+		 ** Special case: unbh->b_page will be NULL if we are coming through
+		 ** DIRECT_IO handler here.
+		 */
+		if (!unbh->b_page || buffer_uptodate(unbh)
+		    || PageUptodate(unbh->b_page)) {
+			up_to_date_bh = NULL;
+		} else {
+			up_to_date_bh = unbh;
+		}
+		n_retval = reiserfs_delete_item(th, path, &end_key, inode,
+						up_to_date_bh);
+
+		total_tail += n_retval;
+		if (tail_size == n_retval)
+			// done: file does not have direct items anymore
+			break;
+
+	}
+	/* if we've copied bytes from disk into the page, we need to zero
+	 ** out the unused part of the block (it was not up to date before)
+	 */
+	if (up_to_date_bh) {
+		unsigned pgoff =
+		    (tail_offset + total_tail - 1) & (PAGE_CACHE_SIZE - 1);
+		char *kaddr = kmap_atomic(up_to_date_bh->b_page, KM_USER0);
+		memset(kaddr + pgoff, 0, n_blk_size - total_tail);
+		kunmap_atomic(kaddr, KM_USER0);
+	}
+
+	REISERFS_I(inode)->i_first_direct_byte = U32_MAX;
+
+	return 0;
+}
+
+/* stolen from fs/buffer.c */
+void reiserfs_unmap_buffer(struct buffer_head *bh)
+{
+	lock_buffer(bh);
+	if (buffer_journaled(bh) || buffer_journal_dirty(bh)) {
+		BUG();
+	}
+	clear_buffer_dirty(bh);
+	/* Remove the buffer from whatever list it belongs to. We are mostly
+	   interested in removing it from per-sb j_dirty_buffers list, to avoid
+	   BUG() on attempt to write not mapped buffer */
+	if ((!list_empty(&bh->b_assoc_buffers) || bh->b_private) && bh->b_page) {
+		struct inode *inode = bh->b_page->mapping->host;
+		struct reiserfs_journal *j = SB_JOURNAL(inode->i_sb);
+		spin_lock(&j->j_dirty_buffers_lock);
+		list_del_init(&bh->b_assoc_buffers);
+		reiserfs_free_jh(bh);
+		spin_unlock(&j->j_dirty_buffers_lock);
+	}
+	clear_buffer_mapped(bh);
+	clear_buffer_req(bh);
+	clear_buffer_new(bh);
+	bh->b_bdev = NULL;
+	unlock_buffer(bh);
+}
+
+/* this first locks inode (neither reads nor sync are permitted),
+   reads tail through page cache, insert direct item. When direct item
+   inserted successfully inode is left locked. Return value is always
+   what we expect from it (number of cut bytes). But when tail remains
+   in the unformatted node, we set mode to SKIP_BALANCING and unlock
+   inode */
+int indirect2direct(struct reiserfs_transaction_handle *th, struct inode *p_s_inode, struct page *page, struct treepath *p_s_path,	/* path to the indirect item. */
+		    const struct cpu_key *p_s_item_key,	/* Key to look for unformatted node pointer to be cut. */
+		    loff_t n_new_file_size,	/* New file size. */
+		    char *p_c_mode)
+{
+	struct super_block *p_s_sb = p_s_inode->i_sb;
+	struct item_head s_ih;
+	unsigned long n_block_size = p_s_sb->s_blocksize;
+	char *tail;
+	int tail_len, round_tail_len;
+	loff_t pos, pos1;	/* position of first byte of the tail */
+	struct cpu_key key;
+
+	BUG_ON(!th->t_trans_id);
+
+	REISERFS_SB(p_s_sb)->s_indirect2direct++;
+
+	*p_c_mode = M_SKIP_BALANCING;
+
+	/* store item head path points to. */
+	copy_item_head(&s_ih, PATH_PITEM_HEAD(p_s_path));
+
+	tail_len = (n_new_file_size & (n_block_size - 1));
+	if (get_inode_sd_version(p_s_inode) == STAT_DATA_V2)
+		round_tail_len = ROUND_UP(tail_len);
+	else
+		round_tail_len = tail_len;
+
+	pos =
+	    le_ih_k_offset(&s_ih) - 1 + (ih_item_len(&s_ih) / UNFM_P_SIZE -
+					 1) * p_s_sb->s_blocksize;
+	pos1 = pos;
+
+	// we are protected by i_mutex. The tail can not disapper, not
+	// append can be done either
+	// we are in truncate or packing tail in file_release
+
+	tail = (char *)kmap(page);	/* this can schedule */
+
+	if (path_changed(&s_ih, p_s_path)) {
+		/* re-search indirect item */
+		if (search_for_position_by_key(p_s_sb, p_s_item_key, p_s_path)
+		    == POSITION_NOT_FOUND)
+			reiserfs_panic(p_s_sb,
+				       "PAP-5520: indirect2direct: "
+				       "item to be converted %K does not exist",
+				       p_s_item_key);
+		copy_item_head(&s_ih, PATH_PITEM_HEAD(p_s_path));
+#ifdef CONFIG_REISERFS_CHECK
+		pos = le_ih_k_offset(&s_ih) - 1 +
+		    (ih_item_len(&s_ih) / UNFM_P_SIZE -
+		     1) * p_s_sb->s_blocksize;
+		if (pos != pos1)
+			reiserfs_panic(p_s_sb, "vs-5530: indirect2direct: "
+				       "tail position changed while we were reading it");
+#endif
+	}
+
+	/* Set direct item header to insert. */
+	make_le_item_head(&s_ih, NULL, get_inode_item_key_version(p_s_inode),
+			  pos1 + 1, TYPE_DIRECT, round_tail_len,
+			  0xffff /*ih_free_space */ );
+
+	/* we want a pointer to the first byte of the tail in the page.
+	 ** the page was locked and this part of the page was up to date when
+	 ** indirect2direct was called, so we know the bytes are still valid
+	 */
+	tail = tail + (pos & (PAGE_CACHE_SIZE - 1));
+
+	PATH_LAST_POSITION(p_s_path)++;
+
+	key = *p_s_item_key;
+	set_cpu_key_k_type(&key, TYPE_DIRECT);
+	key.key_length = 4;
+	/* Insert tail as new direct item in the tree */
+	if (reiserfs_insert_item(th, p_s_path, &key, &s_ih, p_s_inode,
+				 tail ? tail : NULL) < 0) {
+		/* No disk memory. So we can not convert last unformatted node
+		   to the direct item.  In this case we used to adjust
+		   indirect items's ih_free_space. Now ih_free_space is not
+		   used, it would be ideal to write zeros to corresponding
+		   unformatted node. For now i_size is considered as guard for
+		   going out of file size */
+		kunmap(page);
+		return n_block_size - round_tail_len;
+	}
+	kunmap(page);
+
+	/* make sure to get the i_blocks changes from reiserfs_insert_item */
+	reiserfs_update_sd(th, p_s_inode);
+
+	// note: we have now the same as in above direct2indirect
+	// conversion: there are two keys which have matching first three
+	// key components. They only differ by the fouhth one.
+
+	/* We have inserted new direct item and must remove last
+	   unformatted node. */
+	*p_c_mode = M_CUT;
+
+	/* we store position of first direct item in the in-core inode */
+	//mark_file_with_tail (p_s_inode, pos1 + 1);
+	REISERFS_I(p_s_inode)->i_first_direct_byte = pos1 + 1;
+
+	return n_block_size - round_tail_len;
+}
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
new file mode 100644
index 0000000..ad92461
--- /dev/null
+++ b/fs/reiserfs/xattr.c
@@ -0,0 +1,1269 @@
+/*
+ * linux/fs/reiserfs/xattr.c
+ *
+ * Copyright (c) 2002 by Jeff Mahoney, <jeffm@suse.com>
+ *
+ */
+
+/*
+ * In order to implement EA/ACLs in a clean, backwards compatible manner,
+ * they are implemented as files in a "private" directory.
+ * Each EA is in it's own file, with the directory layout like so (/ is assumed
+ * to be relative to fs root). Inside the /.reiserfs_priv/xattrs directory,
+ * directories named using the capital-hex form of the objectid and
+ * generation number are used. Inside each directory are individual files
+ * named with the name of the extended attribute.
+ *
+ * So, for objectid 12648430, we could have:
+ * /.reiserfs_priv/xattrs/C0FFEE.0/system.posix_acl_access
+ * /.reiserfs_priv/xattrs/C0FFEE.0/system.posix_acl_default
+ * /.reiserfs_priv/xattrs/C0FFEE.0/user.Content-Type
+ * .. or similar.
+ *
+ * The file contents are the text of the EA. The size is known based on the
+ * stat data describing the file.
+ *
+ * In the case of system.posix_acl_access and system.posix_acl_default, since
+ * these are special cases for filesystem ACLs, they are interpreted by the
+ * kernel, in addition, they are negatively and positively cached and attached
+ * to the inode so that unnecessary lookups are avoided.
+ */
+
+#include <linux/reiserfs_fs.h>
+#include <linux/capability.h>
+#include <linux/dcache.h>
+#include <linux/namei.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/pagemap.h>
+#include <linux/xattr.h>
+#include <linux/reiserfs_xattr.h>
+#include <linux/reiserfs_acl.h>
+#include <asm/uaccess.h>
+#include <net/checksum.h>
+#include <linux/smp_lock.h>
+#include <linux/stat.h>
+
+#define FL_READONLY 128
+#define FL_DIR_SEM_HELD 256
+#define PRIVROOT_NAME ".reiserfs_priv"
+#define XAROOT_NAME   "xattrs"
+
+static struct reiserfs_xattr_handler *find_xattr_handler_prefix(const char
+								*prefix);
+
+/* Returns the dentry referring to the root of the extended attribute
+ * directory tree. If it has already been retrieved, it is used. If it
+ * hasn't been created and the flags indicate creation is allowed, we
+ * attempt to create it. On error, we return a pointer-encoded error.
+ */
+static struct dentry *get_xa_root(struct super_block *sb, int flags)
+{
+	struct dentry *privroot = dget(REISERFS_SB(sb)->priv_root);
+	struct dentry *xaroot;
+
+	/* This needs to be created at mount-time */
+	if (!privroot)
+		return ERR_PTR(-ENODATA);
+
+	mutex_lock_nested(&privroot->d_inode->i_mutex, I_MUTEX_XATTR);
+	if (REISERFS_SB(sb)->xattr_root) {
+		xaroot = dget(REISERFS_SB(sb)->xattr_root);
+		goto out;
+	}
+
+	xaroot = lookup_one_len(XAROOT_NAME, privroot, strlen(XAROOT_NAME));
+	if (IS_ERR(xaroot)) {
+		goto out;
+	} else if (!xaroot->d_inode) {
+		int err = -ENODATA;
+		if (flags == 0 || flags & XATTR_CREATE)
+			err = privroot->d_inode->i_op->mkdir(privroot->d_inode,
+			                                     xaroot, 0700);
+		if (err) {
+			dput(xaroot);
+			xaroot = ERR_PTR(err);
+			goto out;
+		}
+	}
+	REISERFS_SB(sb)->xattr_root = dget(xaroot);
+
+      out:
+	mutex_unlock(&privroot->d_inode->i_mutex);
+	dput(privroot);
+	return xaroot;
+}
+
+/* Opens the directory corresponding to the inode's extended attribute store.
+ * If flags allow, the tree to the directory may be created. If creation is
+ * prohibited, -ENODATA is returned. */
+static struct dentry *open_xa_dir(const struct inode *inode, int flags)
+{
+	struct dentry *xaroot, *xadir;
+	char namebuf[17];
+
+	xaroot = get_xa_root(inode->i_sb, flags);
+	if (IS_ERR(xaroot))
+		return xaroot;
+
+	/* ok, we have xaroot open */
+	snprintf(namebuf, sizeof(namebuf), "%X.%X",
+		 le32_to_cpu(INODE_PKEY(inode)->k_objectid),
+		 inode->i_generation);
+	xadir = lookup_one_len(namebuf, xaroot, strlen(namebuf));
+	if (IS_ERR(xadir)) {
+		dput(xaroot);
+		return xadir;
+	}
+
+	if (!xadir->d_inode) {
+		int err;
+		if (flags == 0 || flags & XATTR_CREATE) {
+			/* Although there is nothing else trying to create this directory,
+			 * another directory with the same hash may be created, so we need
+			 * to protect against that */
+			err =
+			    xaroot->d_inode->i_op->mkdir(xaroot->d_inode, xadir,
+							 0700);
+			if (err) {
+				dput(xaroot);
+				dput(xadir);
+				return ERR_PTR(err);
+			}
+		}
+		if (!xadir->d_inode) {
+			dput(xaroot);
+			dput(xadir);
+			return ERR_PTR(-ENODATA);
+		}
+	}
+
+	dput(xaroot);
+	return xadir;
+}
+
+/* Returns a dentry corresponding to a specific extended attribute file
+ * for the inode. If flags allow, the file is created. Otherwise, a
+ * valid or negative dentry, or an error is returned. */
+static struct dentry *get_xa_file_dentry(const struct inode *inode,
+					 const char *name, int flags)
+{
+	struct dentry *xadir, *xafile;
+	int err = 0;
+
+	xadir = open_xa_dir(inode, flags);
+	if (IS_ERR(xadir)) {
+		return ERR_CAST(xadir);
+	} else if (!xadir->d_inode) {
+		dput(xadir);
+		return ERR_PTR(-ENODATA);
+	}
+
+	xafile = lookup_one_len(name, xadir, strlen(name));
+	if (IS_ERR(xafile)) {
+		dput(xadir);
+		return ERR_CAST(xafile);
+	}
+
+	if (xafile->d_inode) {	/* file exists */
+		if (flags & XATTR_CREATE) {
+			err = -EEXIST;
+			dput(xafile);
+			goto out;
+		}
+	} else if (flags & XATTR_REPLACE || flags & FL_READONLY) {
+		goto out;
+	} else {
+		/* inode->i_mutex is down, so nothing else can try to create
+		 * the same xattr */
+		err = xadir->d_inode->i_op->create(xadir->d_inode, xafile,
+						   0700 | S_IFREG, NULL);
+
+		if (err) {
+			dput(xafile);
+			goto out;
+		}
+	}
+
+      out:
+	dput(xadir);
+	if (err)
+		xafile = ERR_PTR(err);
+	else if (!xafile->d_inode) {
+		dput(xafile);
+		xafile = ERR_PTR(-ENODATA);
+	}
+	return xafile;
+}
+
+/*
+ * this is very similar to fs/reiserfs/dir.c:reiserfs_readdir, but
+ * we need to drop the path before calling the filldir struct.  That
+ * would be a big performance hit to the non-xattr case, so I've copied
+ * the whole thing for now. --clm
+ *
+ * the big difference is that I go backwards through the directory,
+ * and don't mess with f->f_pos, but the idea is the same.  Do some
+ * action on each and every entry in the directory.
+ *
+ * we're called with i_mutex held, so there are no worries about the directory
+ * changing underneath us.
+ */
+static int __xattr_readdir(struct inode *inode, void *dirent, filldir_t filldir)
+{
+	struct cpu_key pos_key;	/* key of current position in the directory (key of directory entry) */
+	INITIALIZE_PATH(path_to_entry);
+	struct buffer_head *bh;
+	int entry_num;
+	struct item_head *ih, tmp_ih;
+	int search_res;
+	char *local_buf;
+	loff_t next_pos;
+	char small_buf[32];	/* avoid kmalloc if we can */
+	struct reiserfs_de_head *deh;
+	int d_reclen;
+	char *d_name;
+	off_t d_off;
+	ino_t d_ino;
+	struct reiserfs_dir_entry de;
+
+	/* form key for search the next directory entry using f_pos field of
+	   file structure */
+	next_pos = max_reiserfs_offset(inode);
+
+	while (1) {
+	      research:
+		if (next_pos <= DOT_DOT_OFFSET)
+			break;
+		make_cpu_key(&pos_key, inode, next_pos, TYPE_DIRENTRY, 3);
+
+		search_res =
+		    search_by_entry_key(inode->i_sb, &pos_key, &path_to_entry,
+					&de);
+		if (search_res == IO_ERROR) {
+			// FIXME: we could just skip part of directory which could
+			// not be read
+			pathrelse(&path_to_entry);
+			return -EIO;
+		}
+
+		if (search_res == NAME_NOT_FOUND)
+			de.de_entry_num--;
+
+		set_de_name_and_namelen(&de);
+		entry_num = de.de_entry_num;
+		deh = &(de.de_deh[entry_num]);
+
+		bh = de.de_bh;
+		ih = de.de_ih;
+
+		if (!is_direntry_le_ih(ih)) {
+			reiserfs_warning(inode->i_sb, "not direntry %h", ih);
+			break;
+		}
+		copy_item_head(&tmp_ih, ih);
+
+		/* we must have found item, that is item of this directory, */
+		RFALSE(COMP_SHORT_KEYS(&(ih->ih_key), &pos_key),
+		       "vs-9000: found item %h does not match to dir we readdir %K",
+		       ih, &pos_key);
+
+		if (deh_offset(deh) <= DOT_DOT_OFFSET) {
+			break;
+		}
+
+		/* look for the previous entry in the directory */
+		next_pos = deh_offset(deh) - 1;
+
+		if (!de_visible(deh))
+			/* it is hidden entry */
+			continue;
+
+		d_reclen = entry_length(bh, ih, entry_num);
+		d_name = B_I_DEH_ENTRY_FILE_NAME(bh, ih, deh);
+		d_off = deh_offset(deh);
+		d_ino = deh_objectid(deh);
+
+		if (!d_name[d_reclen - 1])
+			d_reclen = strlen(d_name);
+
+		if (d_reclen > REISERFS_MAX_NAME(inode->i_sb->s_blocksize)) {
+			/* too big to send back to VFS */
+			continue;
+		}
+
+		/* Ignore the .reiserfs_priv entry */
+		if (reiserfs_xattrs(inode->i_sb) &&
+		    !old_format_only(inode->i_sb) &&
+		    deh_objectid(deh) ==
+		    le32_to_cpu(INODE_PKEY
+				(REISERFS_SB(inode->i_sb)->priv_root->d_inode)->
+				k_objectid))
+			continue;
+
+		if (d_reclen <= 32) {
+			local_buf = small_buf;
+		} else {
+			local_buf = kmalloc(d_reclen, GFP_NOFS);
+			if (!local_buf) {
+				pathrelse(&path_to_entry);
+				return -ENOMEM;
+			}
+			if (item_moved(&tmp_ih, &path_to_entry)) {
+				kfree(local_buf);
+
+				/* sigh, must retry.  Do this same offset again */
+				next_pos = d_off;
+				goto research;
+			}
+		}
+
+		// Note, that we copy name to user space via temporary
+		// buffer (local_buf) because filldir will block if
+		// user space buffer is swapped out. At that time
+		// entry can move to somewhere else
+		memcpy(local_buf, d_name, d_reclen);
+
+		/* the filldir function might need to start transactions,
+		 * or do who knows what.  Release the path now that we've
+		 * copied all the important stuff out of the deh
+		 */
+		pathrelse(&path_to_entry);
+
+		if (filldir(dirent, local_buf, d_reclen, d_off, d_ino,
+			    DT_UNKNOWN) < 0) {
+			if (local_buf != small_buf) {
+				kfree(local_buf);
+			}
+			goto end;
+		}
+		if (local_buf != small_buf) {
+			kfree(local_buf);
+		}
+	}			/* while */
+
+      end:
+	pathrelse(&path_to_entry);
+	return 0;
+}
+
+/*
+ * this could be done with dedicated readdir ops for the xattr files,
+ * but I want to get something working asap
+ * this is stolen from vfs_readdir
+ *
+ */
+static
+int xattr_readdir(struct inode *inode, filldir_t filler, void *buf)
+{
+	int res = -ENOENT;
+	mutex_lock_nested(&inode->i_mutex, I_MUTEX_XATTR);
+	if (!IS_DEADDIR(inode)) {
+		lock_kernel();
+		res = __xattr_readdir(inode, buf, filler);
+		unlock_kernel();
+	}
+	mutex_unlock(&inode->i_mutex);
+	return res;
+}
+
+/* Internal operations on file data */
+static inline void reiserfs_put_page(struct page *page)
+{
+	kunmap(page);
+	page_cache_release(page);
+}
+
+static struct page *reiserfs_get_page(struct inode *dir, unsigned long n)
+{
+	struct address_space *mapping = dir->i_mapping;
+	struct page *page;
+	/* We can deadlock if we try to free dentries,
+	   and an unlink/rmdir has just occured - GFP_NOFS avoids this */
+	mapping_set_gfp_mask(mapping, GFP_NOFS);
+	page = read_mapping_page(mapping, n, NULL);
+	if (!IS_ERR(page)) {
+		kmap(page);
+		if (PageError(page))
+			goto fail;
+	}
+	return page;
+
+      fail:
+	reiserfs_put_page(page);
+	return ERR_PTR(-EIO);
+}
+
+static inline __u32 xattr_hash(const char *msg, int len)
+{
+	return csum_partial(msg, len, 0);
+}
+
+int reiserfs_commit_write(struct file *f, struct page *page,
+			  unsigned from, unsigned to);
+int reiserfs_prepare_write(struct file *f, struct page *page,
+			   unsigned from, unsigned to);
+
+
+/* Generic extended attribute operations that can be used by xa plugins */
+
+/*
+ * inode->i_mutex: down
+ */
+int
+reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
+		   size_t buffer_size, int flags)
+{
+	int err = 0;
+	struct dentry *dentry;
+	struct page *page;
+	char *data;
+	struct address_space *mapping;
+	size_t file_pos = 0;
+	size_t buffer_pos = 0;
+	struct inode *xinode;
+	struct iattr newattrs;
+	__u32 xahash = 0;
+
+	if (get_inode_sd_version(inode) == STAT_DATA_V1)
+		return -EOPNOTSUPP;
+
+	/* Empty xattrs are ok, they're just empty files, no hash */
+	if (buffer && buffer_size)
+		xahash = xattr_hash(buffer, buffer_size);
+
+      open_file:
+	dentry = get_xa_file_dentry(inode, name, flags);
+	if (IS_ERR(dentry)) {
+		err = PTR_ERR(dentry);
+		goto out;
+	}
+
+	xinode = dentry->d_inode;
+	REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
+
+	/* we need to copy it off.. */
+	if (xinode->i_nlink > 1) {
+		dput(dentry);
+		err = reiserfs_xattr_del(inode, name);
+		if (err < 0)
+			goto out;
+		/* We just killed the old one, we're not replacing anymore */
+		if (flags & XATTR_REPLACE)
+			flags &= ~XATTR_REPLACE;
+		goto open_file;
+	}
+
+	/* Resize it so we're ok to write there */
+	newattrs.ia_size = buffer_size;
+	newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
+	mutex_lock_nested(&xinode->i_mutex, I_MUTEX_XATTR);
+	err = notify_change(dentry, &newattrs);
+	if (err)
+		goto out_filp;
+
+	mapping = xinode->i_mapping;
+	while (buffer_pos < buffer_size || buffer_pos == 0) {
+		size_t chunk;
+		size_t skip = 0;
+		size_t page_offset = (file_pos & (PAGE_CACHE_SIZE - 1));
+		if (buffer_size - buffer_pos > PAGE_CACHE_SIZE)
+			chunk = PAGE_CACHE_SIZE;
+		else
+			chunk = buffer_size - buffer_pos;
+
+		page = reiserfs_get_page(xinode, file_pos >> PAGE_CACHE_SHIFT);
+		if (IS_ERR(page)) {
+			err = PTR_ERR(page);
+			goto out_filp;
+		}
+
+		lock_page(page);
+		data = page_address(page);
+
+		if (file_pos == 0) {
+			struct reiserfs_xattr_header *rxh;
+			skip = file_pos = sizeof(struct reiserfs_xattr_header);
+			if (chunk + skip > PAGE_CACHE_SIZE)
+				chunk = PAGE_CACHE_SIZE - skip;
+			rxh = (struct reiserfs_xattr_header *)data;
+			rxh->h_magic = cpu_to_le32(REISERFS_XATTR_MAGIC);
+			rxh->h_hash = cpu_to_le32(xahash);
+		}
+
+		err = reiserfs_prepare_write(NULL, page, page_offset,
+					    page_offset + chunk + skip);
+		if (!err) {
+			if (buffer)
+				memcpy(data + skip, buffer + buffer_pos, chunk);
+			err = reiserfs_commit_write(NULL, page, page_offset,
+						    page_offset + chunk +
+						    skip);
+		}
+		unlock_page(page);
+		reiserfs_put_page(page);
+		buffer_pos += chunk;
+		file_pos += chunk;
+		skip = 0;
+		if (err || buffer_size == 0 || !buffer)
+			break;
+	}
+
+	/* We can't mark the inode dirty if it's not hashed. This is the case
+	 * when we're inheriting the default ACL. If we dirty it, the inode
+	 * gets marked dirty, but won't (ever) make it onto the dirty list until
+	 * it's synced explicitly to clear I_DIRTY. This is bad. */
+	if (!hlist_unhashed(&inode->i_hash)) {
+		inode->i_ctime = CURRENT_TIME_SEC;
+		mark_inode_dirty(inode);
+	}
+
+      out_filp:
+	mutex_unlock(&xinode->i_mutex);
+	dput(dentry);
+
+      out:
+	return err;
+}
+
+/*
+ * inode->i_mutex: down
+ */
+int
+reiserfs_xattr_get(const struct inode *inode, const char *name, void *buffer,
+		   size_t buffer_size)
+{
+	ssize_t err = 0;
+	struct dentry *dentry;
+	size_t isize;
+	size_t file_pos = 0;
+	size_t buffer_pos = 0;
+	struct page *page;
+	struct inode *xinode;
+	__u32 hash = 0;
+
+	if (name == NULL)
+		return -EINVAL;
+
+	/* We can't have xattrs attached to v1 items since they don't have
+	 * generation numbers */
+	if (get_inode_sd_version(inode) == STAT_DATA_V1)
+		return -EOPNOTSUPP;
+
+	dentry = get_xa_file_dentry(inode, name, FL_READONLY);
+	if (IS_ERR(dentry)) {
+		err = PTR_ERR(dentry);
+		goto out;
+	}
+
+	xinode = dentry->d_inode;
+	isize = xinode->i_size;
+	REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
+
+	/* Just return the size needed */
+	if (buffer == NULL) {
+		err = isize - sizeof(struct reiserfs_xattr_header);
+		goto out_dput;
+	}
+
+	if (buffer_size < isize - sizeof(struct reiserfs_xattr_header)) {
+		err = -ERANGE;
+		goto out_dput;
+	}
+
+	while (file_pos < isize) {
+		size_t chunk;
+		char *data;
+		size_t skip = 0;
+		if (isize - file_pos > PAGE_CACHE_SIZE)
+			chunk = PAGE_CACHE_SIZE;
+		else
+			chunk = isize - file_pos;
+
+		page = reiserfs_get_page(xinode, file_pos >> PAGE_CACHE_SHIFT);
+		if (IS_ERR(page)) {
+			err = PTR_ERR(page);
+			goto out_dput;
+		}
+
+		lock_page(page);
+		data = page_address(page);
+		if (file_pos == 0) {
+			struct reiserfs_xattr_header *rxh =
+			    (struct reiserfs_xattr_header *)data;
+			skip = file_pos = sizeof(struct reiserfs_xattr_header);
+			chunk -= skip;
+			/* Magic doesn't match up.. */
+			if (rxh->h_magic != cpu_to_le32(REISERFS_XATTR_MAGIC)) {
+				unlock_page(page);
+				reiserfs_put_page(page);
+				reiserfs_warning(inode->i_sb,
+						 "Invalid magic for xattr (%s) "
+						 "associated with %k", name,
+						 INODE_PKEY(inode));
+				err = -EIO;
+				goto out_dput;
+			}
+			hash = le32_to_cpu(rxh->h_hash);
+		}
+		memcpy(buffer + buffer_pos, data + skip, chunk);
+		unlock_page(page);
+		reiserfs_put_page(page);
+		file_pos += chunk;
+		buffer_pos += chunk;
+		skip = 0;
+	}
+	err = isize - sizeof(struct reiserfs_xattr_header);
+
+	if (xattr_hash(buffer, isize - sizeof(struct reiserfs_xattr_header)) !=
+	    hash) {
+		reiserfs_warning(inode->i_sb,
+				 "Invalid hash for xattr (%s) associated "
+				 "with %k", name, INODE_PKEY(inode));
+		err = -EIO;
+	}
+
+      out_dput:
+	dput(dentry);
+
+      out:
+	return err;
+}
+
+static int
+__reiserfs_xattr_del(struct dentry *xadir, const char *name, int namelen)
+{
+	struct dentry *dentry;
+	struct inode *dir = xadir->d_inode;
+	int err = 0;
+
+	dentry = lookup_one_len(name, xadir, namelen);
+	if (IS_ERR(dentry)) {
+		err = PTR_ERR(dentry);
+		goto out;
+	} else if (!dentry->d_inode) {
+		err = -ENODATA;
+		goto out_file;
+	}
+
+	/* Skip directories.. */
+	if (S_ISDIR(dentry->d_inode->i_mode))
+		goto out_file;
+
+	if (!is_reiserfs_priv_object(dentry->d_inode)) {
+		reiserfs_warning(dir->i_sb, "OID %08x [%.*s/%.*s] doesn't have "
+				 "priv flag set [parent is %sset].",
+				 le32_to_cpu(INODE_PKEY(dentry->d_inode)->
+					     k_objectid), xadir->d_name.len,
+				 xadir->d_name.name, namelen, name,
+				 is_reiserfs_priv_object(xadir->
+							 d_inode) ? "" :
+				 "not ");
+		dput(dentry);
+		return -EIO;
+	}
+
+	err = dir->i_op->unlink(dir, dentry);
+	if (!err)
+		d_delete(dentry);
+
+      out_file:
+	dput(dentry);
+
+      out:
+	return err;
+}
+
+int reiserfs_xattr_del(struct inode *inode, const char *name)
+{
+	struct dentry *dir;
+	int err;
+
+	dir = open_xa_dir(inode, FL_READONLY);
+	if (IS_ERR(dir)) {
+		err = PTR_ERR(dir);
+		goto out;
+	}
+
+	err = __reiserfs_xattr_del(dir, name, strlen(name));
+	dput(dir);
+
+	if (!err) {
+		inode->i_ctime = CURRENT_TIME_SEC;
+		mark_inode_dirty(inode);
+	}
+
+      out:
+	return err;
+}
+
+/* The following are side effects of other operations that aren't explicitly
+ * modifying extended attributes. This includes operations such as permissions
+ * or ownership changes, object deletions, etc. */
+
+static int
+reiserfs_delete_xattrs_filler(void *buf, const char *name, int namelen,
+			      loff_t offset, u64 ino, unsigned int d_type)
+{
+	struct dentry *xadir = (struct dentry *)buf;
+
+	return __reiserfs_xattr_del(xadir, name, namelen);
+
+}
+
+/* This is called w/ inode->i_mutex downed */
+int reiserfs_delete_xattrs(struct inode *inode)
+{
+	struct dentry *dir, *root;
+	int err = 0;
+
+	/* Skip out, an xattr has no xattrs associated with it */
+	if (is_reiserfs_priv_object(inode) ||
+	    get_inode_sd_version(inode) == STAT_DATA_V1 ||
+	    !reiserfs_xattrs(inode->i_sb)) {
+		return 0;
+	}
+	reiserfs_read_lock_xattrs(inode->i_sb);
+	dir = open_xa_dir(inode, FL_READONLY);
+	reiserfs_read_unlock_xattrs(inode->i_sb);
+	if (IS_ERR(dir)) {
+		err = PTR_ERR(dir);
+		goto out;
+	} else if (!dir->d_inode) {
+		dput(dir);
+		return 0;
+	}
+
+	lock_kernel();
+	err = xattr_readdir(dir->d_inode, reiserfs_delete_xattrs_filler, dir);
+	if (err) {
+		unlock_kernel();
+		goto out_dir;
+	}
+
+	/* Leftovers besides . and .. -- that's not good. */
+	if (dir->d_inode->i_nlink <= 2) {
+		root = get_xa_root(inode->i_sb, XATTR_REPLACE);
+		reiserfs_write_lock_xattrs(inode->i_sb);
+		err = vfs_rmdir(root->d_inode, dir);
+		reiserfs_write_unlock_xattrs(inode->i_sb);
+		dput(root);
+	} else {
+		reiserfs_warning(inode->i_sb,
+				 "Couldn't remove all entries in directory");
+	}
+	unlock_kernel();
+
+      out_dir:
+	dput(dir);
+
+      out:
+	if (!err)
+		REISERFS_I(inode)->i_flags =
+		    REISERFS_I(inode)->i_flags & ~i_has_xattr_dir;
+	return err;
+}
+
+struct reiserfs_chown_buf {
+	struct inode *inode;
+	struct dentry *xadir;
+	struct iattr *attrs;
+};
+
+/* XXX: If there is a better way to do this, I'd love to hear about it */
+static int
+reiserfs_chown_xattrs_filler(void *buf, const char *name, int namelen,
+			     loff_t offset, u64 ino, unsigned int d_type)
+{
+	struct reiserfs_chown_buf *chown_buf = (struct reiserfs_chown_buf *)buf;
+	struct dentry *xafile, *xadir = chown_buf->xadir;
+	struct iattr *attrs = chown_buf->attrs;
+	int err = 0;
+
+	xafile = lookup_one_len(name, xadir, namelen);
+	if (IS_ERR(xafile))
+		return PTR_ERR(xafile);
+	else if (!xafile->d_inode) {
+		dput(xafile);
+		return -ENODATA;
+	}
+
+	if (!S_ISDIR(xafile->d_inode->i_mode))
+		err = notify_change(xafile, attrs);
+	dput(xafile);
+
+	return err;
+}
+
+int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs)
+{
+	struct dentry *dir;
+	int err = 0;
+	struct reiserfs_chown_buf buf;
+	unsigned int ia_valid = attrs->ia_valid;
+
+	/* Skip out, an xattr has no xattrs associated with it */
+	if (is_reiserfs_priv_object(inode) ||
+	    get_inode_sd_version(inode) == STAT_DATA_V1 ||
+	    !reiserfs_xattrs(inode->i_sb)) {
+		return 0;
+	}
+	reiserfs_read_lock_xattrs(inode->i_sb);
+	dir = open_xa_dir(inode, FL_READONLY);
+	reiserfs_read_unlock_xattrs(inode->i_sb);
+	if (IS_ERR(dir)) {
+		if (PTR_ERR(dir) != -ENODATA)
+			err = PTR_ERR(dir);
+		goto out;
+	} else if (!dir->d_inode) {
+		dput(dir);
+		goto out;
+	}
+
+	lock_kernel();
+
+	attrs->ia_valid &= (ATTR_UID | ATTR_GID | ATTR_CTIME);
+	buf.xadir = dir;
+	buf.attrs = attrs;
+	buf.inode = inode;
+
+	err = xattr_readdir(dir->d_inode, reiserfs_chown_xattrs_filler, &buf);
+	if (err) {
+		unlock_kernel();
+		goto out_dir;
+	}
+
+	err = notify_change(dir, attrs);
+	unlock_kernel();
+
+      out_dir:
+	dput(dir);
+
+      out:
+	attrs->ia_valid = ia_valid;
+	return err;
+}
+
+/* Actual operations that are exported to VFS-land */
+
+/*
+ * Inode operation getxattr()
+ * Preliminary locking: we down dentry->d_inode->i_mutex
+ */
+ssize_t
+reiserfs_getxattr(struct dentry * dentry, const char *name, void *buffer,
+		  size_t size)
+{
+	struct reiserfs_xattr_handler *xah = find_xattr_handler_prefix(name);
+	int err;
+
+	if (!xah || !reiserfs_xattrs(dentry->d_sb) ||
+	    get_inode_sd_version(dentry->d_inode) == STAT_DATA_V1)
+		return -EOPNOTSUPP;
+
+	reiserfs_read_lock_xattr_i(dentry->d_inode);
+	reiserfs_read_lock_xattrs(dentry->d_sb);
+	err = xah->get(dentry->d_inode, name, buffer, size);
+	reiserfs_read_unlock_xattrs(dentry->d_sb);
+	reiserfs_read_unlock_xattr_i(dentry->d_inode);
+	return err;
+}
+
+/*
+ * Inode operation setxattr()
+ *
+ * dentry->d_inode->i_mutex down
+ */
+int
+reiserfs_setxattr(struct dentry *dentry, const char *name, const void *value,
+		  size_t size, int flags)
+{
+	struct reiserfs_xattr_handler *xah = find_xattr_handler_prefix(name);
+	int err;
+	int lock;
+
+	if (!xah || !reiserfs_xattrs(dentry->d_sb) ||
+	    get_inode_sd_version(dentry->d_inode) == STAT_DATA_V1)
+		return -EOPNOTSUPP;
+
+	reiserfs_write_lock_xattr_i(dentry->d_inode);
+	lock = !has_xattr_dir(dentry->d_inode);
+	if (lock)
+		reiserfs_write_lock_xattrs(dentry->d_sb);
+	else
+		reiserfs_read_lock_xattrs(dentry->d_sb);
+	err = xah->set(dentry->d_inode, name, value, size, flags);
+	if (lock)
+		reiserfs_write_unlock_xattrs(dentry->d_sb);
+	else
+		reiserfs_read_unlock_xattrs(dentry->d_sb);
+	reiserfs_write_unlock_xattr_i(dentry->d_inode);
+	return err;
+}
+
+/*
+ * Inode operation removexattr()
+ *
+ * dentry->d_inode->i_mutex down
+ */
+int reiserfs_removexattr(struct dentry *dentry, const char *name)
+{
+	int err;
+	struct reiserfs_xattr_handler *xah = find_xattr_handler_prefix(name);
+
+	if (!xah || !reiserfs_xattrs(dentry->d_sb) ||
+	    get_inode_sd_version(dentry->d_inode) == STAT_DATA_V1)
+		return -EOPNOTSUPP;
+
+	reiserfs_write_lock_xattr_i(dentry->d_inode);
+	reiserfs_read_lock_xattrs(dentry->d_sb);
+
+	/* Deletion pre-operation */
+	if (xah->del) {
+		err = xah->del(dentry->d_inode, name);
+		if (err)
+			goto out;
+	}
+
+	err = reiserfs_xattr_del(dentry->d_inode, name);
+
+	dentry->d_inode->i_ctime = CURRENT_TIME_SEC;
+	mark_inode_dirty(dentry->d_inode);
+
+      out:
+	reiserfs_read_unlock_xattrs(dentry->d_sb);
+	reiserfs_write_unlock_xattr_i(dentry->d_inode);
+	return err;
+}
+
+/* This is what filldir will use:
+ * r_pos will always contain the amount of space required for the entire
+ * list. If r_pos becomes larger than r_size, we need more space and we
+ * return an error indicating this. If r_pos is less than r_size, then we've
+ * filled the buffer successfully and we return success */
+struct reiserfs_listxattr_buf {
+	int r_pos;
+	int r_size;
+	char *r_buf;
+	struct inode *r_inode;
+};
+
+static int
+reiserfs_listxattr_filler(void *buf, const char *name, int namelen,
+			  loff_t offset, u64 ino, unsigned int d_type)
+{
+	struct reiserfs_listxattr_buf *b = (struct reiserfs_listxattr_buf *)buf;
+	int len = 0;
+	if (name[0] != '.'
+	    || (namelen != 1 && (name[1] != '.' || namelen != 2))) {
+		struct reiserfs_xattr_handler *xah =
+		    find_xattr_handler_prefix(name);
+		if (!xah)
+			return 0;	/* Unsupported xattr name, skip it */
+
+		/* We call ->list() twice because the operation isn't required to just
+		 * return the name back - we want to make sure we have enough space */
+		len += xah->list(b->r_inode, name, namelen, NULL);
+
+		if (len) {
+			if (b->r_pos + len + 1 <= b->r_size) {
+				char *p = b->r_buf + b->r_pos;
+				p += xah->list(b->r_inode, name, namelen, p);
+				*p++ = '\0';
+			}
+			b->r_pos += len + 1;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * Inode operation listxattr()
+ *
+ * Preliminary locking: we down dentry->d_inode->i_mutex
+ */
+ssize_t reiserfs_listxattr(struct dentry * dentry, char *buffer, size_t size)
+{
+	struct dentry *dir;
+	int err = 0;
+	struct reiserfs_listxattr_buf buf;
+
+	if (!dentry->d_inode)
+		return -EINVAL;
+
+	if (!reiserfs_xattrs(dentry->d_sb) ||
+	    get_inode_sd_version(dentry->d_inode) == STAT_DATA_V1)
+		return -EOPNOTSUPP;
+
+	reiserfs_read_lock_xattr_i(dentry->d_inode);
+	reiserfs_read_lock_xattrs(dentry->d_sb);
+	dir = open_xa_dir(dentry->d_inode, FL_READONLY);
+	reiserfs_read_unlock_xattrs(dentry->d_sb);
+	if (IS_ERR(dir)) {
+		err = PTR_ERR(dir);
+		if (err == -ENODATA)
+			err = 0;	/* Not an error if there aren't any xattrs */
+		goto out;
+	}
+
+	buf.r_buf = buffer;
+	buf.r_size = buffer ? size : 0;
+	buf.r_pos = 0;
+	buf.r_inode = dentry->d_inode;
+
+	REISERFS_I(dentry->d_inode)->i_flags |= i_has_xattr_dir;
+
+	err = xattr_readdir(dir->d_inode, reiserfs_listxattr_filler, &buf);
+	if (err)
+		goto out_dir;
+
+	if (buf.r_pos > buf.r_size && buffer != NULL)
+		err = -ERANGE;
+	else
+		err = buf.r_pos;
+
+      out_dir:
+	dput(dir);
+
+      out:
+	reiserfs_read_unlock_xattr_i(dentry->d_inode);
+	return err;
+}
+
+/* This is the implementation for the xattr plugin infrastructure */
+static LIST_HEAD(xattr_handlers);
+static DEFINE_RWLOCK(handler_lock);
+
+static struct reiserfs_xattr_handler *find_xattr_handler_prefix(const char
+								*prefix)
+{
+	struct reiserfs_xattr_handler *xah = NULL;
+	struct list_head *p;
+
+	read_lock(&handler_lock);
+	list_for_each(p, &xattr_handlers) {
+		xah = list_entry(p, struct reiserfs_xattr_handler, handlers);
+		if (strncmp(xah->prefix, prefix, strlen(xah->prefix)) == 0)
+			break;
+		xah = NULL;
+	}
+
+	read_unlock(&handler_lock);
+	return xah;
+}
+
+static void __unregister_handlers(void)
+{
+	struct reiserfs_xattr_handler *xah;
+	struct list_head *p, *tmp;
+
+	list_for_each_safe(p, tmp, &xattr_handlers) {
+		xah = list_entry(p, struct reiserfs_xattr_handler, handlers);
+		if (xah->exit)
+			xah->exit();
+
+		list_del_init(p);
+	}
+	INIT_LIST_HEAD(&xattr_handlers);
+}
+
+int __init reiserfs_xattr_register_handlers(void)
+{
+	int err = 0;
+	struct reiserfs_xattr_handler *xah;
+	struct list_head *p;
+
+	write_lock(&handler_lock);
+
+	/* If we're already initialized, nothing to do */
+	if (!list_empty(&xattr_handlers)) {
+		write_unlock(&handler_lock);
+		return 0;
+	}
+
+	/* Add the handlers */
+	list_add_tail(&user_handler.handlers, &xattr_handlers);
+	list_add_tail(&trusted_handler.handlers, &xattr_handlers);
+#ifdef CONFIG_REISERFS_FS_SECURITY
+	list_add_tail(&security_handler.handlers, &xattr_handlers);
+#endif
+#ifdef CONFIG_REISERFS_FS_POSIX_ACL
+	list_add_tail(&posix_acl_access_handler.handlers, &xattr_handlers);
+	list_add_tail(&posix_acl_default_handler.handlers, &xattr_handlers);
+#endif
+
+	/* Run initializers, if available */
+	list_for_each(p, &xattr_handlers) {
+		xah = list_entry(p, struct reiserfs_xattr_handler, handlers);
+		if (xah->init) {
+			err = xah->init();
+			if (err) {
+				list_del_init(p);
+				break;
+			}
+		}
+	}
+
+	/* Clean up other handlers, if any failed */
+	if (err)
+		__unregister_handlers();
+
+	write_unlock(&handler_lock);
+	return err;
+}
+
+void reiserfs_xattr_unregister_handlers(void)
+{
+	write_lock(&handler_lock);
+	__unregister_handlers();
+	write_unlock(&handler_lock);
+}
+
+/* This will catch lookups from the fs root to .reiserfs_priv */
+static int
+xattr_lookup_poison(struct dentry *dentry, struct qstr *q1, struct qstr *name)
+{
+	struct dentry *priv_root = REISERFS_SB(dentry->d_sb)->priv_root;
+	if (name->len == priv_root->d_name.len &&
+	    name->hash == priv_root->d_name.hash &&
+	    !memcmp(name->name, priv_root->d_name.name, name->len)) {
+		return -ENOENT;
+	} else if (q1->len == name->len &&
+		   !memcmp(q1->name, name->name, name->len))
+		return 0;
+	return 1;
+}
+
+static struct dentry_operations xattr_lookup_poison_ops = {
+	.d_compare = xattr_lookup_poison,
+};
+
+/* We need to take a copy of the mount flags since things like
+ * MS_RDONLY don't get set until *after* we're called.
+ * mount_flags != mount_options */
+int reiserfs_xattr_init(struct super_block *s, int mount_flags)
+{
+	int err = 0;
+
+	/* We need generation numbers to ensure that the oid mapping is correct
+	 * v3.5 filesystems don't have them. */
+	if (!old_format_only(s)) {
+		set_bit(REISERFS_XATTRS, &(REISERFS_SB(s)->s_mount_opt));
+	} else if (reiserfs_xattrs_optional(s)) {
+		/* Old format filesystem, but optional xattrs have been enabled
+		 * at mount time. Error out. */
+		reiserfs_warning(s, "xattrs/ACLs not supported on pre v3.6 "
+				 "format filesystem. Failing mount.");
+		err = -EOPNOTSUPP;
+		goto error;
+	} else {
+		/* Old format filesystem, but no optional xattrs have been enabled. This
+		 * means we silently disable xattrs on the filesystem. */
+		clear_bit(REISERFS_XATTRS, &(REISERFS_SB(s)->s_mount_opt));
+	}
+
+	/* If we don't have the privroot located yet - go find it */
+	if (reiserfs_xattrs(s) && !REISERFS_SB(s)->priv_root) {
+		struct dentry *dentry;
+		dentry = lookup_one_len(PRIVROOT_NAME, s->s_root,
+					strlen(PRIVROOT_NAME));
+		if (!IS_ERR(dentry)) {
+			if (!(mount_flags & MS_RDONLY) && !dentry->d_inode) {
+				struct inode *inode = dentry->d_parent->d_inode;
+				mutex_lock_nested(&inode->i_mutex,
+						  I_MUTEX_XATTR);
+				err = inode->i_op->mkdir(inode, dentry, 0700);
+				mutex_unlock(&inode->i_mutex);
+				if (err) {
+					dput(dentry);
+					dentry = NULL;
+				}
+
+				if (dentry && dentry->d_inode)
+					reiserfs_warning(s,
+							 "Created %s on %s - reserved for "
+							 "xattr storage.",
+							 PRIVROOT_NAME,
+							 reiserfs_bdevname
+							 (inode->i_sb));
+			} else if (!dentry->d_inode) {
+				dput(dentry);
+				dentry = NULL;
+			}
+		} else
+			err = PTR_ERR(dentry);
+
+		if (!err && dentry) {
+			s->s_root->d_op = &xattr_lookup_poison_ops;
+			reiserfs_mark_inode_private(dentry->d_inode);
+			REISERFS_SB(s)->priv_root = dentry;
+		} else if (!(mount_flags & MS_RDONLY)) {	/* xattrs are unavailable */
+			/* If we're read-only it just means that the dir hasn't been
+			 * created. Not an error -- just no xattrs on the fs. We'll
+			 * check again if we go read-write */
+			reiserfs_warning(s, "xattrs/ACLs enabled and couldn't "
+					 "find/create .reiserfs_priv. Failing mount.");
+			err = -EOPNOTSUPP;
+		}
+	}
+
+      error:
+	/* This is only nonzero if there was an error initializing the xattr
+	 * directory or if there is a condition where we don't support them. */
+	if (err) {
+		clear_bit(REISERFS_XATTRS, &(REISERFS_SB(s)->s_mount_opt));
+		clear_bit(REISERFS_XATTRS_USER, &(REISERFS_SB(s)->s_mount_opt));
+		clear_bit(REISERFS_POSIXACL, &(REISERFS_SB(s)->s_mount_opt));
+	}
+
+	/* The super_block MS_POSIXACL must mirror the (no)acl mount option. */
+	s->s_flags = s->s_flags & ~MS_POSIXACL;
+	if (reiserfs_posixacl(s))
+		s->s_flags |= MS_POSIXACL;
+
+	return err;
+}
+
+static int reiserfs_check_acl(struct inode *inode, int mask)
+{
+	struct posix_acl *acl;
+	int error = -EAGAIN; /* do regular unix permission checks by default */
+
+	reiserfs_read_lock_xattr_i(inode);
+	reiserfs_read_lock_xattrs(inode->i_sb);
+
+	acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS);
+
+	reiserfs_read_unlock_xattrs(inode->i_sb);
+	reiserfs_read_unlock_xattr_i(inode);
+
+	if (acl) {
+		if (!IS_ERR(acl)) {
+			error = posix_acl_permission(inode, acl, mask);
+			posix_acl_release(acl);
+		} else if (PTR_ERR(acl) != -ENODATA)
+			error = PTR_ERR(acl);
+	}
+
+	return error;
+}
+
+int reiserfs_permission(struct inode *inode, int mask)
+{
+	/*
+	 * We don't do permission checks on the internal objects.
+	 * Permissions are determined by the "owning" object.
+	 */
+	if (is_reiserfs_priv_object(inode))
+		return 0;
+
+	/*
+	 * Stat data v1 doesn't support ACLs.
+	 */
+	if (get_inode_sd_version(inode) == STAT_DATA_V1)
+		return generic_permission(inode, mask, NULL);
+	else
+		return generic_permission(inode, mask, reiserfs_check_acl);
+}
diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c
new file mode 100644
index 0000000..b7e4fa4
--- /dev/null
+++ b/fs/reiserfs/xattr_acl.c
@@ -0,0 +1,566 @@
+#include <linux/capability.h>
+#include <linux/fs.h>
+#include <linux/posix_acl.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/errno.h>
+#include <linux/pagemap.h>
+#include <linux/xattr.h>
+#include <linux/posix_acl_xattr.h>
+#include <linux/reiserfs_xattr.h>
+#include <linux/reiserfs_acl.h>
+#include <asm/uaccess.h>
+
+static int reiserfs_set_acl(struct inode *inode, int type,
+			    struct posix_acl *acl);
+
+static int
+xattr_set_acl(struct inode *inode, int type, const void *value, size_t size)
+{
+	struct posix_acl *acl;
+	int error;
+
+	if (!reiserfs_posixacl(inode->i_sb))
+		return -EOPNOTSUPP;
+	if (!is_owner_or_cap(inode))
+		return -EPERM;
+
+	if (value) {
+		acl = posix_acl_from_xattr(value, size);
+		if (IS_ERR(acl)) {
+			return PTR_ERR(acl);
+		} else if (acl) {
+			error = posix_acl_valid(acl);
+			if (error)
+				goto release_and_out;
+		}
+	} else
+		acl = NULL;
+
+	error = reiserfs_set_acl(inode, type, acl);
+
+      release_and_out:
+	posix_acl_release(acl);
+	return error;
+}
+
+static int
+xattr_get_acl(struct inode *inode, int type, void *buffer, size_t size)
+{
+	struct posix_acl *acl;
+	int error;
+
+	if (!reiserfs_posixacl(inode->i_sb))
+		return -EOPNOTSUPP;
+
+	acl = reiserfs_get_acl(inode, type);
+	if (IS_ERR(acl))
+		return PTR_ERR(acl);
+	if (acl == NULL)
+		return -ENODATA;
+	error = posix_acl_to_xattr(acl, buffer, size);
+	posix_acl_release(acl);
+
+	return error;
+}
+
+/*
+ * Convert from filesystem to in-memory representation.
+ */
+static struct posix_acl *posix_acl_from_disk(const void *value, size_t size)
+{
+	const char *end = (char *)value + size;
+	int n, count;
+	struct posix_acl *acl;
+
+	if (!value)
+		return NULL;
+	if (size < sizeof(reiserfs_acl_header))
+		return ERR_PTR(-EINVAL);
+	if (((reiserfs_acl_header *) value)->a_version !=
+	    cpu_to_le32(REISERFS_ACL_VERSION))
+		return ERR_PTR(-EINVAL);
+	value = (char *)value + sizeof(reiserfs_acl_header);
+	count = reiserfs_acl_count(size);
+	if (count < 0)
+		return ERR_PTR(-EINVAL);
+	if (count == 0)
+		return NULL;
+	acl = posix_acl_alloc(count, GFP_NOFS);
+	if (!acl)
+		return ERR_PTR(-ENOMEM);
+	for (n = 0; n < count; n++) {
+		reiserfs_acl_entry *entry = (reiserfs_acl_entry *) value;
+		if ((char *)value + sizeof(reiserfs_acl_entry_short) > end)
+			goto fail;
+		acl->a_entries[n].e_tag = le16_to_cpu(entry->e_tag);
+		acl->a_entries[n].e_perm = le16_to_cpu(entry->e_perm);
+		switch (acl->a_entries[n].e_tag) {
+		case ACL_USER_OBJ:
+		case ACL_GROUP_OBJ:
+		case ACL_MASK:
+		case ACL_OTHER:
+			value = (char *)value +
+			    sizeof(reiserfs_acl_entry_short);
+			acl->a_entries[n].e_id = ACL_UNDEFINED_ID;
+			break;
+
+		case ACL_USER:
+		case ACL_GROUP:
+			value = (char *)value + sizeof(reiserfs_acl_entry);
+			if ((char *)value > end)
+				goto fail;
+			acl->a_entries[n].e_id = le32_to_cpu(entry->e_id);
+			break;
+
+		default:
+			goto fail;
+		}
+	}
+	if (value != end)
+		goto fail;
+	return acl;
+
+      fail:
+	posix_acl_release(acl);
+	return ERR_PTR(-EINVAL);
+}
+
+/*
+ * Convert from in-memory to filesystem representation.
+ */
+static void *posix_acl_to_disk(const struct posix_acl *acl, size_t * size)
+{
+	reiserfs_acl_header *ext_acl;
+	char *e;
+	int n;
+
+	*size = reiserfs_acl_size(acl->a_count);
+	ext_acl = kmalloc(sizeof(reiserfs_acl_header) +
+						  acl->a_count *
+						  sizeof(reiserfs_acl_entry),
+						  GFP_NOFS);
+	if (!ext_acl)
+		return ERR_PTR(-ENOMEM);
+	ext_acl->a_version = cpu_to_le32(REISERFS_ACL_VERSION);
+	e = (char *)ext_acl + sizeof(reiserfs_acl_header);
+	for (n = 0; n < acl->a_count; n++) {
+		reiserfs_acl_entry *entry = (reiserfs_acl_entry *) e;
+		entry->e_tag = cpu_to_le16(acl->a_entries[n].e_tag);
+		entry->e_perm = cpu_to_le16(acl->a_entries[n].e_perm);
+		switch (acl->a_entries[n].e_tag) {
+		case ACL_USER:
+		case ACL_GROUP:
+			entry->e_id = cpu_to_le32(acl->a_entries[n].e_id);
+			e += sizeof(reiserfs_acl_entry);
+			break;
+
+		case ACL_USER_OBJ:
+		case ACL_GROUP_OBJ:
+		case ACL_MASK:
+		case ACL_OTHER:
+			e += sizeof(reiserfs_acl_entry_short);
+			break;
+
+		default:
+			goto fail;
+		}
+	}
+	return (char *)ext_acl;
+
+      fail:
+	kfree(ext_acl);
+	return ERR_PTR(-EINVAL);
+}
+
+/*
+ * Inode operation get_posix_acl().
+ *
+ * inode->i_mutex: down
+ * BKL held [before 2.5.x]
+ */
+struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
+{
+	char *name, *value;
+	struct posix_acl *acl, **p_acl;
+	int size;
+	int retval;
+	struct reiserfs_inode_info *reiserfs_i = REISERFS_I(inode);
+
+	switch (type) {
+	case ACL_TYPE_ACCESS:
+		name = POSIX_ACL_XATTR_ACCESS;
+		p_acl = &reiserfs_i->i_acl_access;
+		break;
+	case ACL_TYPE_DEFAULT:
+		name = POSIX_ACL_XATTR_DEFAULT;
+		p_acl = &reiserfs_i->i_acl_default;
+		break;
+	default:
+		return ERR_PTR(-EINVAL);
+	}
+
+	if (IS_ERR(*p_acl)) {
+		if (PTR_ERR(*p_acl) == -ENODATA)
+			return NULL;
+	} else if (*p_acl != NULL)
+		return posix_acl_dup(*p_acl);
+
+	size = reiserfs_xattr_get(inode, name, NULL, 0);
+	if (size < 0) {
+		if (size == -ENODATA || size == -ENOSYS) {
+			*p_acl = ERR_PTR(-ENODATA);
+			return NULL;
+		}
+		return ERR_PTR(size);
+	}
+
+	value = kmalloc(size, GFP_NOFS);
+	if (!value)
+		return ERR_PTR(-ENOMEM);
+
+	retval = reiserfs_xattr_get(inode, name, value, size);
+	if (retval == -ENODATA || retval == -ENOSYS) {
+		/* This shouldn't actually happen as it should have
+		   been caught above.. but just in case */
+		acl = NULL;
+		*p_acl = ERR_PTR(-ENODATA);
+	} else if (retval < 0) {
+		acl = ERR_PTR(retval);
+	} else {
+		acl = posix_acl_from_disk(value, retval);
+		if (!IS_ERR(acl))
+			*p_acl = posix_acl_dup(acl);
+	}
+
+	kfree(value);
+	return acl;
+}
+
+/*
+ * Inode operation set_posix_acl().
+ *
+ * inode->i_mutex: down
+ * BKL held [before 2.5.x]
+ */
+static int
+reiserfs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
+{
+	char *name;
+	void *value = NULL;
+	struct posix_acl **p_acl;
+	size_t size;
+	int error;
+	struct reiserfs_inode_info *reiserfs_i = REISERFS_I(inode);
+
+	if (S_ISLNK(inode->i_mode))
+		return -EOPNOTSUPP;
+
+	switch (type) {
+	case ACL_TYPE_ACCESS:
+		name = POSIX_ACL_XATTR_ACCESS;
+		p_acl = &reiserfs_i->i_acl_access;
+		if (acl) {
+			mode_t mode = inode->i_mode;
+			error = posix_acl_equiv_mode(acl, &mode);
+			if (error < 0)
+				return error;
+			else {
+				inode->i_mode = mode;
+				if (error == 0)
+					acl = NULL;
+			}
+		}
+		break;
+	case ACL_TYPE_DEFAULT:
+		name = POSIX_ACL_XATTR_DEFAULT;
+		p_acl = &reiserfs_i->i_acl_default;
+		if (!S_ISDIR(inode->i_mode))
+			return acl ? -EACCES : 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (acl) {
+		value = posix_acl_to_disk(acl, &size);
+		if (IS_ERR(value))
+			return (int)PTR_ERR(value);
+		error = reiserfs_xattr_set(inode, name, value, size, 0);
+	} else {
+		error = reiserfs_xattr_del(inode, name);
+		if (error == -ENODATA) {
+			/* This may seem odd here, but it means that the ACL was set
+			 * with a value representable with mode bits. If there was
+			 * an ACL before, reiserfs_xattr_del already dirtied the inode.
+			 */
+			mark_inode_dirty(inode);
+			error = 0;
+		}
+	}
+
+	kfree(value);
+
+	if (!error) {
+		/* Release the old one */
+		if (!IS_ERR(*p_acl) && *p_acl)
+			posix_acl_release(*p_acl);
+
+		if (acl == NULL)
+			*p_acl = ERR_PTR(-ENODATA);
+		else
+			*p_acl = posix_acl_dup(acl);
+	}
+
+	return error;
+}
+
+/* dir->i_mutex: locked,
+ * inode is new and not released into the wild yet */
+int
+reiserfs_inherit_default_acl(struct inode *dir, struct dentry *dentry,
+			     struct inode *inode)
+{
+	struct posix_acl *acl;
+	int err = 0;
+
+	/* ACLs only get applied to files and directories */
+	if (S_ISLNK(inode->i_mode))
+		return 0;
+
+	/* ACLs can only be used on "new" objects, so if it's an old object
+	 * there is nothing to inherit from */
+	if (get_inode_sd_version(dir) == STAT_DATA_V1)
+		goto apply_umask;
+
+	/* Don't apply ACLs to objects in the .reiserfs_priv tree.. This
+	 * would be useless since permissions are ignored, and a pain because
+	 * it introduces locking cycles */
+	if (is_reiserfs_priv_object(dir)) {
+		reiserfs_mark_inode_private(inode);
+		goto apply_umask;
+	}
+
+	acl = reiserfs_get_acl(dir, ACL_TYPE_DEFAULT);
+	if (IS_ERR(acl)) {
+		if (PTR_ERR(acl) == -ENODATA)
+			goto apply_umask;
+		return PTR_ERR(acl);
+	}
+
+	if (acl) {
+		struct posix_acl *acl_copy;
+		mode_t mode = inode->i_mode;
+		int need_acl;
+
+		/* Copy the default ACL to the default ACL of a new directory */
+		if (S_ISDIR(inode->i_mode)) {
+			err = reiserfs_set_acl(inode, ACL_TYPE_DEFAULT, acl);
+			if (err)
+				goto cleanup;
+		}
+
+		/* Now we reconcile the new ACL and the mode,
+		   potentially modifying both */
+		acl_copy = posix_acl_clone(acl, GFP_NOFS);
+		if (!acl_copy) {
+			err = -ENOMEM;
+			goto cleanup;
+		}
+
+		need_acl = posix_acl_create_masq(acl_copy, &mode);
+		if (need_acl >= 0) {
+			if (mode != inode->i_mode) {
+				inode->i_mode = mode;
+			}
+
+			/* If we need an ACL.. */
+			if (need_acl > 0) {
+				err =
+				    reiserfs_set_acl(inode, ACL_TYPE_ACCESS,
+						     acl_copy);
+				if (err)
+					goto cleanup_copy;
+			}
+		}
+	      cleanup_copy:
+		posix_acl_release(acl_copy);
+	      cleanup:
+		posix_acl_release(acl);
+	} else {
+	      apply_umask:
+		/* no ACL, apply umask */
+		inode->i_mode &= ~current->fs->umask;
+	}
+
+	return err;
+}
+
+/* Looks up and caches the result of the default ACL.
+ * We do this so that we don't need to carry the xattr_sem into
+ * reiserfs_new_inode if we don't need to */
+int reiserfs_cache_default_acl(struct inode *inode)
+{
+	int ret = 0;
+	if (reiserfs_posixacl(inode->i_sb) && !is_reiserfs_priv_object(inode)) {
+		struct posix_acl *acl;
+		reiserfs_read_lock_xattr_i(inode);
+		reiserfs_read_lock_xattrs(inode->i_sb);
+		acl = reiserfs_get_acl(inode, ACL_TYPE_DEFAULT);
+		reiserfs_read_unlock_xattrs(inode->i_sb);
+		reiserfs_read_unlock_xattr_i(inode);
+		ret = (acl && !IS_ERR(acl));
+		if (ret)
+			posix_acl_release(acl);
+	}
+
+	return ret;
+}
+
+int reiserfs_acl_chmod(struct inode *inode)
+{
+	struct posix_acl *acl, *clone;
+	int error;
+
+	if (S_ISLNK(inode->i_mode))
+		return -EOPNOTSUPP;
+
+	if (get_inode_sd_version(inode) == STAT_DATA_V1 ||
+	    !reiserfs_posixacl(inode->i_sb)) {
+		return 0;
+	}
+
+	reiserfs_read_lock_xattrs(inode->i_sb);
+	acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS);
+	reiserfs_read_unlock_xattrs(inode->i_sb);
+	if (!acl)
+		return 0;
+	if (IS_ERR(acl))
+		return PTR_ERR(acl);
+	clone = posix_acl_clone(acl, GFP_NOFS);
+	posix_acl_release(acl);
+	if (!clone)
+		return -ENOMEM;
+	error = posix_acl_chmod_masq(clone, inode->i_mode);
+	if (!error) {
+		int lock = !has_xattr_dir(inode);
+		reiserfs_write_lock_xattr_i(inode);
+		if (lock)
+			reiserfs_write_lock_xattrs(inode->i_sb);
+		else
+			reiserfs_read_lock_xattrs(inode->i_sb);
+		error = reiserfs_set_acl(inode, ACL_TYPE_ACCESS, clone);
+		if (lock)
+			reiserfs_write_unlock_xattrs(inode->i_sb);
+		else
+			reiserfs_read_unlock_xattrs(inode->i_sb);
+		reiserfs_write_unlock_xattr_i(inode);
+	}
+	posix_acl_release(clone);
+	return error;
+}
+
+static int
+posix_acl_access_get(struct inode *inode, const char *name,
+		     void *buffer, size_t size)
+{
+	if (strlen(name) != sizeof(POSIX_ACL_XATTR_ACCESS) - 1)
+		return -EINVAL;
+	return xattr_get_acl(inode, ACL_TYPE_ACCESS, buffer, size);
+}
+
+static int
+posix_acl_access_set(struct inode *inode, const char *name,
+		     const void *value, size_t size, int flags)
+{
+	if (strlen(name) != sizeof(POSIX_ACL_XATTR_ACCESS) - 1)
+		return -EINVAL;
+	return xattr_set_acl(inode, ACL_TYPE_ACCESS, value, size);
+}
+
+static int posix_acl_access_del(struct inode *inode, const char *name)
+{
+	struct reiserfs_inode_info *reiserfs_i = REISERFS_I(inode);
+	struct posix_acl **acl = &reiserfs_i->i_acl_access;
+	if (strlen(name) != sizeof(POSIX_ACL_XATTR_ACCESS) - 1)
+		return -EINVAL;
+	if (!IS_ERR(*acl) && *acl) {
+		posix_acl_release(*acl);
+		*acl = ERR_PTR(-ENODATA);
+	}
+
+	return 0;
+}
+
+static int
+posix_acl_access_list(struct inode *inode, const char *name, int namelen,
+		      char *out)
+{
+	int len = namelen;
+	if (!reiserfs_posixacl(inode->i_sb))
+		return 0;
+	if (out)
+		memcpy(out, name, len);
+
+	return len;
+}
+
+struct reiserfs_xattr_handler posix_acl_access_handler = {
+	.prefix = POSIX_ACL_XATTR_ACCESS,
+	.get = posix_acl_access_get,
+	.set = posix_acl_access_set,
+	.del = posix_acl_access_del,
+	.list = posix_acl_access_list,
+};
+
+static int
+posix_acl_default_get(struct inode *inode, const char *name,
+		      void *buffer, size_t size)
+{
+	if (strlen(name) != sizeof(POSIX_ACL_XATTR_DEFAULT) - 1)
+		return -EINVAL;
+	return xattr_get_acl(inode, ACL_TYPE_DEFAULT, buffer, size);
+}
+
+static int
+posix_acl_default_set(struct inode *inode, const char *name,
+		      const void *value, size_t size, int flags)
+{
+	if (strlen(name) != sizeof(POSIX_ACL_XATTR_DEFAULT) - 1)
+		return -EINVAL;
+	return xattr_set_acl(inode, ACL_TYPE_DEFAULT, value, size);
+}
+
+static int posix_acl_default_del(struct inode *inode, const char *name)
+{
+	struct reiserfs_inode_info *reiserfs_i = REISERFS_I(inode);
+	struct posix_acl **acl = &reiserfs_i->i_acl_default;
+	if (strlen(name) != sizeof(POSIX_ACL_XATTR_DEFAULT) - 1)
+		return -EINVAL;
+	if (!IS_ERR(*acl) && *acl) {
+		posix_acl_release(*acl);
+		*acl = ERR_PTR(-ENODATA);
+	}
+
+	return 0;
+}
+
+static int
+posix_acl_default_list(struct inode *inode, const char *name, int namelen,
+		       char *out)
+{
+	int len = namelen;
+	if (!reiserfs_posixacl(inode->i_sb))
+		return 0;
+	if (out)
+		memcpy(out, name, len);
+
+	return len;
+}
+
+struct reiserfs_xattr_handler posix_acl_default_handler = {
+	.prefix = POSIX_ACL_XATTR_DEFAULT,
+	.get = posix_acl_default_get,
+	.set = posix_acl_default_set,
+	.del = posix_acl_default_del,
+	.list = posix_acl_default_list,
+};
diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c
new file mode 100644
index 0000000..056008d
--- /dev/null
+++ b/fs/reiserfs/xattr_security.c
@@ -0,0 +1,65 @@
+#include <linux/reiserfs_fs.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/pagemap.h>
+#include <linux/xattr.h>
+#include <linux/reiserfs_xattr.h>
+#include <asm/uaccess.h>
+
+static int
+security_get(struct inode *inode, const char *name, void *buffer, size_t size)
+{
+	if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
+		return -EINVAL;
+
+	if (is_reiserfs_priv_object(inode))
+		return -EPERM;
+
+	return reiserfs_xattr_get(inode, name, buffer, size);
+}
+
+static int
+security_set(struct inode *inode, const char *name, const void *buffer,
+	     size_t size, int flags)
+{
+	if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
+		return -EINVAL;
+
+	if (is_reiserfs_priv_object(inode))
+		return -EPERM;
+
+	return reiserfs_xattr_set(inode, name, buffer, size, flags);
+}
+
+static int security_del(struct inode *inode, const char *name)
+{
+	if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
+		return -EINVAL;
+
+	if (is_reiserfs_priv_object(inode))
+		return -EPERM;
+
+	return 0;
+}
+
+static int
+security_list(struct inode *inode, const char *name, int namelen, char *out)
+{
+	int len = namelen;
+
+	if (is_reiserfs_priv_object(inode))
+		return 0;
+
+	if (out)
+		memcpy(out, name, len);
+
+	return len;
+}
+
+struct reiserfs_xattr_handler security_handler = {
+	.prefix = XATTR_SECURITY_PREFIX,
+	.get = security_get,
+	.set = security_set,
+	.del = security_del,
+	.list = security_list,
+};
diff --git a/fs/reiserfs/xattr_trusted.c b/fs/reiserfs/xattr_trusted.c
new file mode 100644
index 0000000..60abe2b
--- /dev/null
+++ b/fs/reiserfs/xattr_trusted.c
@@ -0,0 +1,78 @@
+#include <linux/reiserfs_fs.h>
+#include <linux/capability.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/pagemap.h>
+#include <linux/xattr.h>
+#include <linux/reiserfs_xattr.h>
+#include <asm/uaccess.h>
+
+static int
+trusted_get(struct inode *inode, const char *name, void *buffer, size_t size)
+{
+	if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
+		return -EINVAL;
+
+	if (!reiserfs_xattrs(inode->i_sb))
+		return -EOPNOTSUPP;
+
+	if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
+		return -EPERM;
+
+	return reiserfs_xattr_get(inode, name, buffer, size);
+}
+
+static int
+trusted_set(struct inode *inode, const char *name, const void *buffer,
+	    size_t size, int flags)
+{
+	if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
+		return -EINVAL;
+
+	if (!reiserfs_xattrs(inode->i_sb))
+		return -EOPNOTSUPP;
+
+	if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
+		return -EPERM;
+
+	return reiserfs_xattr_set(inode, name, buffer, size, flags);
+}
+
+static int trusted_del(struct inode *inode, const char *name)
+{
+	if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
+		return -EINVAL;
+
+	if (!reiserfs_xattrs(inode->i_sb))
+		return -EOPNOTSUPP;
+
+	if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
+		return -EPERM;
+
+	return 0;
+}
+
+static int
+trusted_list(struct inode *inode, const char *name, int namelen, char *out)
+{
+	int len = namelen;
+
+	if (!reiserfs_xattrs(inode->i_sb))
+		return 0;
+
+	if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
+		return 0;
+
+	if (out)
+		memcpy(out, name, len);
+
+	return len;
+}
+
+struct reiserfs_xattr_handler trusted_handler = {
+	.prefix = XATTR_TRUSTED_PREFIX,
+	.get = trusted_get,
+	.set = trusted_set,
+	.del = trusted_del,
+	.list = trusted_list,
+};
diff --git a/fs/reiserfs/xattr_user.c b/fs/reiserfs/xattr_user.c
new file mode 100644
index 0000000..1384efc
--- /dev/null
+++ b/fs/reiserfs/xattr_user.c
@@ -0,0 +1,66 @@
+#include <linux/reiserfs_fs.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/pagemap.h>
+#include <linux/xattr.h>
+#include <linux/reiserfs_xattr.h>
+#include <asm/uaccess.h>
+
+#ifdef CONFIG_REISERFS_FS_POSIX_ACL
+# include <linux/reiserfs_acl.h>
+#endif
+
+static int
+user_get(struct inode *inode, const char *name, void *buffer, size_t size)
+{
+
+	if (strlen(name) < sizeof(XATTR_USER_PREFIX))
+		return -EINVAL;
+	if (!reiserfs_xattrs_user(inode->i_sb))
+		return -EOPNOTSUPP;
+	return reiserfs_xattr_get(inode, name, buffer, size);
+}
+
+static int
+user_set(struct inode *inode, const char *name, const void *buffer,
+	 size_t size, int flags)
+{
+
+	if (strlen(name) < sizeof(XATTR_USER_PREFIX))
+		return -EINVAL;
+
+	if (!reiserfs_xattrs_user(inode->i_sb))
+		return -EOPNOTSUPP;
+	return reiserfs_xattr_set(inode, name, buffer, size, flags);
+}
+
+static int user_del(struct inode *inode, const char *name)
+{
+	if (strlen(name) < sizeof(XATTR_USER_PREFIX))
+		return -EINVAL;
+
+	if (!reiserfs_xattrs_user(inode->i_sb))
+		return -EOPNOTSUPP;
+	return 0;
+}
+
+static int
+user_list(struct inode *inode, const char *name, int namelen, char *out)
+{
+	int len = namelen;
+	if (!reiserfs_xattrs_user(inode->i_sb))
+		return 0;
+
+	if (out)
+		memcpy(out, name, len);
+
+	return len;
+}
+
+struct reiserfs_xattr_handler user_handler = {
+	.prefix = XATTR_USER_PREFIX,
+	.get = user_get,
+	.set = user_set,
+	.del = user_del,
+	.list = user_list,
+};