diff options
Diffstat (limited to 'fs/ufs')
| -rw-r--r-- | fs/ufs/Makefile | 8 | ||||
| -rw-r--r-- | fs/ufs/balloc.c | 818 | ||||
| -rw-r--r-- | fs/ufs/cylinder.c | 209 | ||||
| -rw-r--r-- | fs/ufs/dir.c | 627 | ||||
| -rw-r--r-- | fs/ufs/file.c | 55 | ||||
| -rw-r--r-- | fs/ufs/ialloc.c | 302 | ||||
| -rw-r--r-- | fs/ufs/inode.c | 816 | ||||
| -rw-r--r-- | fs/ufs/namei.c | 375 | ||||
| -rw-r--r-- | fs/ufs/super.c | 1347 | ||||
| -rw-r--r-- | fs/ufs/swab.h | 133 | ||||
| -rw-r--r-- | fs/ufs/symlink.c | 42 | ||||
| -rw-r--r-- | fs/ufs/truncate.c | 477 | ||||
| -rw-r--r-- | fs/ufs/util.c | 257 | ||||
| -rw-r--r-- | fs/ufs/util.h | 526 |
14 files changed, 5992 insertions, 0 deletions
diff --git a/fs/ufs/Makefile b/fs/ufs/Makefile new file mode 100644 index 0000000..dd39980 --- /dev/null +++ b/fs/ufs/Makefile @@ -0,0 +1,8 @@ +# +# Makefile for the Linux ufs filesystem routines. +# + +obj-$(CONFIG_UFS_FS) += ufs.o + +ufs-objs := balloc.o cylinder.o dir.o file.o ialloc.o inode.o \ + namei.o super.o symlink.o truncate.o util.o diff --git a/fs/ufs/balloc.c b/fs/ufs/balloc.c new file mode 100644 index 0000000..997640c --- /dev/null +++ b/fs/ufs/balloc.c @@ -0,0 +1,818 @@ +/* + * linux/fs/ufs/balloc.c + * + * Copyright (C) 1998 + * Daniel Pirkl <daniel.pirkl@email.cz> + * Charles University, Faculty of Mathematics and Physics + */ + +#include <linux/fs.h> +#include <linux/ufs_fs.h> +#include <linux/stat.h> +#include <linux/time.h> +#include <linux/string.h> +#include <linux/quotaops.h> +#include <linux/buffer_head.h> +#include <linux/sched.h> +#include <linux/bitops.h> +#include <asm/byteorder.h> + +#include "swab.h" +#include "util.h" + +#undef UFS_BALLOC_DEBUG + +#ifdef UFS_BALLOC_DEBUG +#define UFSD(x) printk("(%s, %d), %s:", __FILE__, __LINE__, __FUNCTION__); printk x; +#else +#define UFSD(x) +#endif + +static unsigned ufs_add_fragments (struct inode *, unsigned, unsigned, unsigned, int *); +static unsigned ufs_alloc_fragments (struct inode *, unsigned, unsigned, unsigned, int *); +static unsigned ufs_alloccg_block (struct inode *, struct ufs_cg_private_info *, unsigned, int *); +static unsigned ufs_bitmap_search (struct super_block *, struct ufs_cg_private_info *, unsigned, unsigned); +static unsigned char ufs_fragtable_8fpb[], ufs_fragtable_other[]; +static void ufs_clusteracct(struct super_block *, struct ufs_cg_private_info *, unsigned, int); + +/* + * Free 'count' fragments from fragment number 'fragment' + */ +void ufs_free_fragments (struct inode * inode, unsigned fragment, unsigned count) { + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct ufs_cg_private_info * ucpi; + struct ufs_cylinder_group * ucg; + unsigned cgno, bit, end_bit, bbase, blkmap, i, blkno, cylno; + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first(USPI_UBH); + + UFSD(("ENTER, fragment %u, count %u\n", fragment, count)) + + if (ufs_fragnum(fragment) + count > uspi->s_fpg) + ufs_error (sb, "ufs_free_fragments", "internal error"); + + lock_super(sb); + + cgno = ufs_dtog(fragment); + bit = ufs_dtogd(fragment); + if (cgno >= uspi->s_ncg) { + ufs_panic (sb, "ufs_free_fragments", "freeing blocks are outside device"); + goto failed; + } + + ucpi = ufs_load_cylinder (sb, cgno); + if (!ucpi) + goto failed; + ucg = ubh_get_ucg (UCPI_UBH); + if (!ufs_cg_chkmagic(sb, ucg)) { + ufs_panic (sb, "ufs_free_fragments", "internal error, bad magic number on cg %u", cgno); + goto failed; + } + + end_bit = bit + count; + bbase = ufs_blknum (bit); + blkmap = ubh_blkmap (UCPI_UBH, ucpi->c_freeoff, bbase); + ufs_fragacct (sb, blkmap, ucg->cg_frsum, -1); + for (i = bit; i < end_bit; i++) { + if (ubh_isclr (UCPI_UBH, ucpi->c_freeoff, i)) + ubh_setbit (UCPI_UBH, ucpi->c_freeoff, i); + else ufs_error (sb, "ufs_free_fragments", + "bit already cleared for fragment %u", i); + } + + DQUOT_FREE_BLOCK (inode, count); + + + fs32_add(sb, &ucg->cg_cs.cs_nffree, count); + fs32_add(sb, &usb1->fs_cstotal.cs_nffree, count); + fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count); + blkmap = ubh_blkmap (UCPI_UBH, ucpi->c_freeoff, bbase); + ufs_fragacct(sb, blkmap, ucg->cg_frsum, 1); + + /* + * Trying to reassemble free fragments into block + */ + blkno = ufs_fragstoblks (bbase); + if (ubh_isblockset(UCPI_UBH, ucpi->c_freeoff, blkno)) { + fs32_sub(sb, &ucg->cg_cs.cs_nffree, uspi->s_fpb); + fs32_sub(sb, &usb1->fs_cstotal.cs_nffree, uspi->s_fpb); + fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, uspi->s_fpb); + if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD) + ufs_clusteracct (sb, ucpi, blkno, 1); + fs32_add(sb, &ucg->cg_cs.cs_nbfree, 1); + fs32_add(sb, &usb1->fs_cstotal.cs_nbfree, 1); + fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nbfree, 1); + cylno = ufs_cbtocylno (bbase); + fs16_add(sb, &ubh_cg_blks(ucpi, cylno, ufs_cbtorpos(bbase)), 1); + fs32_add(sb, &ubh_cg_blktot(ucpi, cylno), 1); + } + + ubh_mark_buffer_dirty (USPI_UBH); + ubh_mark_buffer_dirty (UCPI_UBH); + if (sb->s_flags & MS_SYNCHRONOUS) { + ubh_wait_on_buffer (UCPI_UBH); + ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **)&ucpi); + ubh_wait_on_buffer (UCPI_UBH); + } + sb->s_dirt = 1; + + unlock_super (sb); + UFSD(("EXIT\n")) + return; + +failed: + unlock_super (sb); + UFSD(("EXIT (FAILED)\n")) + return; +} + +/* + * Free 'count' fragments from fragment number 'fragment' (free whole blocks) + */ +void ufs_free_blocks (struct inode * inode, unsigned fragment, unsigned count) { + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct ufs_cg_private_info * ucpi; + struct ufs_cylinder_group * ucg; + unsigned overflow, cgno, bit, end_bit, blkno, i, cylno; + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first(USPI_UBH); + + UFSD(("ENTER, fragment %u, count %u\n", fragment, count)) + + if ((fragment & uspi->s_fpbmask) || (count & uspi->s_fpbmask)) { + ufs_error (sb, "ufs_free_blocks", "internal error, " + "fragment %u, count %u\n", fragment, count); + goto failed; + } + + lock_super(sb); + +do_more: + overflow = 0; + cgno = ufs_dtog (fragment); + bit = ufs_dtogd (fragment); + if (cgno >= uspi->s_ncg) { + ufs_panic (sb, "ufs_free_blocks", "freeing blocks are outside device"); + goto failed; + } + end_bit = bit + count; + if (end_bit > uspi->s_fpg) { + overflow = bit + count - uspi->s_fpg; + count -= overflow; + end_bit -= overflow; + } + + ucpi = ufs_load_cylinder (sb, cgno); + if (!ucpi) + goto failed; + ucg = ubh_get_ucg (UCPI_UBH); + if (!ufs_cg_chkmagic(sb, ucg)) { + ufs_panic (sb, "ufs_free_blocks", "internal error, bad magic number on cg %u", cgno); + goto failed; + } + + for (i = bit; i < end_bit; i += uspi->s_fpb) { + blkno = ufs_fragstoblks(i); + if (ubh_isblockset(UCPI_UBH, ucpi->c_freeoff, blkno)) { + ufs_error(sb, "ufs_free_blocks", "freeing free fragment"); + } + ubh_setblock(UCPI_UBH, ucpi->c_freeoff, blkno); + if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD) + ufs_clusteracct (sb, ucpi, blkno, 1); + DQUOT_FREE_BLOCK(inode, uspi->s_fpb); + + fs32_add(sb, &ucg->cg_cs.cs_nbfree, 1); + fs32_add(sb, &usb1->fs_cstotal.cs_nbfree, 1); + fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nbfree, 1); + cylno = ufs_cbtocylno(i); + fs16_add(sb, &ubh_cg_blks(ucpi, cylno, ufs_cbtorpos(i)), 1); + fs32_add(sb, &ubh_cg_blktot(ucpi, cylno), 1); + } + + ubh_mark_buffer_dirty (USPI_UBH); + ubh_mark_buffer_dirty (UCPI_UBH); + if (sb->s_flags & MS_SYNCHRONOUS) { + ubh_wait_on_buffer (UCPI_UBH); + ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **)&ucpi); + ubh_wait_on_buffer (UCPI_UBH); + } + + if (overflow) { + fragment += count; + count = overflow; + goto do_more; + } + + sb->s_dirt = 1; + unlock_super (sb); + UFSD(("EXIT\n")) + return; + +failed: + unlock_super (sb); + UFSD(("EXIT (FAILED)\n")) + return; +} + + + +#define NULLIFY_FRAGMENTS \ + for (i = oldcount; i < newcount; i++) { \ + bh = sb_getblk(sb, result + i); \ + memset (bh->b_data, 0, sb->s_blocksize); \ + set_buffer_uptodate(bh); \ + mark_buffer_dirty (bh); \ + if (IS_SYNC(inode)) \ + sync_dirty_buffer(bh); \ + brelse (bh); \ + } + +unsigned ufs_new_fragments (struct inode * inode, __fs32 * p, unsigned fragment, + unsigned goal, unsigned count, int * err ) +{ + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct buffer_head * bh; + unsigned cgno, oldcount, newcount, tmp, request, i, result; + + UFSD(("ENTER, ino %lu, fragment %u, goal %u, count %u\n", inode->i_ino, fragment, goal, count)) + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first(USPI_UBH); + *err = -ENOSPC; + + lock_super (sb); + + tmp = fs32_to_cpu(sb, *p); + if (count + ufs_fragnum(fragment) > uspi->s_fpb) { + ufs_warning (sb, "ufs_new_fragments", "internal warning" + " fragment %u, count %u", fragment, count); + count = uspi->s_fpb - ufs_fragnum(fragment); + } + oldcount = ufs_fragnum (fragment); + newcount = oldcount + count; + + /* + * Somebody else has just allocated our fragments + */ + if (oldcount) { + if (!tmp) { + ufs_error (sb, "ufs_new_fragments", "internal error, " + "fragment %u, tmp %u\n", fragment, tmp); + unlock_super (sb); + return (unsigned)-1; + } + if (fragment < UFS_I(inode)->i_lastfrag) { + UFSD(("EXIT (ALREADY ALLOCATED)\n")) + unlock_super (sb); + return 0; + } + } + else { + if (tmp) { + UFSD(("EXIT (ALREADY ALLOCATED)\n")) + unlock_super(sb); + return 0; + } + } + + /* + * There is not enough space for user on the device + */ + if (!capable(CAP_SYS_RESOURCE) && ufs_freespace(usb1, UFS_MINFREE) <= 0) { + unlock_super (sb); + UFSD(("EXIT (FAILED)\n")) + return 0; + } + + if (goal >= uspi->s_size) + goal = 0; + if (goal == 0) + cgno = ufs_inotocg (inode->i_ino); + else + cgno = ufs_dtog (goal); + + /* + * allocate new fragment + */ + if (oldcount == 0) { + result = ufs_alloc_fragments (inode, cgno, goal, count, err); + if (result) { + *p = cpu_to_fs32(sb, result); + *err = 0; + inode->i_blocks += count << uspi->s_nspfshift; + UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count); + NULLIFY_FRAGMENTS + } + unlock_super(sb); + UFSD(("EXIT, result %u\n", result)) + return result; + } + + /* + * resize block + */ + result = ufs_add_fragments (inode, tmp, oldcount, newcount, err); + if (result) { + *err = 0; + inode->i_blocks += count << uspi->s_nspfshift; + UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count); + NULLIFY_FRAGMENTS + unlock_super(sb); + UFSD(("EXIT, result %u\n", result)) + return result; + } + + /* + * allocate new block and move data + */ + switch (fs32_to_cpu(sb, usb1->fs_optim)) { + case UFS_OPTSPACE: + request = newcount; + if (uspi->s_minfree < 5 || fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree) + > uspi->s_dsize * uspi->s_minfree / (2 * 100) ) + break; + usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME); + break; + default: + usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME); + + case UFS_OPTTIME: + request = uspi->s_fpb; + if (fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree) < uspi->s_dsize * + (uspi->s_minfree - 2) / 100) + break; + usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME); + break; + } + result = ufs_alloc_fragments (inode, cgno, goal, request, err); + if (result) { + for (i = 0; i < oldcount; i++) { + bh = sb_bread(sb, tmp + i); + if(bh) + { + clear_buffer_dirty(bh); + bh->b_blocknr = result + i; + mark_buffer_dirty (bh); + if (IS_SYNC(inode)) + sync_dirty_buffer(bh); + brelse (bh); + } + else + { + printk(KERN_ERR "ufs_new_fragments: bread fail\n"); + unlock_super(sb); + return 0; + } + } + *p = cpu_to_fs32(sb, result); + *err = 0; + inode->i_blocks += count << uspi->s_nspfshift; + UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count); + NULLIFY_FRAGMENTS + unlock_super(sb); + if (newcount < request) + ufs_free_fragments (inode, result + newcount, request - newcount); + ufs_free_fragments (inode, tmp, oldcount); + UFSD(("EXIT, result %u\n", result)) + return result; + } + + unlock_super(sb); + UFSD(("EXIT (FAILED)\n")) + return 0; +} + +static unsigned +ufs_add_fragments (struct inode * inode, unsigned fragment, + unsigned oldcount, unsigned newcount, int * err) +{ + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct ufs_cg_private_info * ucpi; + struct ufs_cylinder_group * ucg; + unsigned cgno, fragno, fragoff, count, fragsize, i; + + UFSD(("ENTER, fragment %u, oldcount %u, newcount %u\n", fragment, oldcount, newcount)) + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first (USPI_UBH); + count = newcount - oldcount; + + cgno = ufs_dtog(fragment); + if (fs32_to_cpu(sb, UFS_SB(sb)->fs_cs(cgno).cs_nffree) < count) + return 0; + if ((ufs_fragnum (fragment) + newcount) > uspi->s_fpb) + return 0; + ucpi = ufs_load_cylinder (sb, cgno); + if (!ucpi) + return 0; + ucg = ubh_get_ucg (UCPI_UBH); + if (!ufs_cg_chkmagic(sb, ucg)) { + ufs_panic (sb, "ufs_add_fragments", + "internal error, bad magic number on cg %u", cgno); + return 0; + } + + fragno = ufs_dtogd (fragment); + fragoff = ufs_fragnum (fragno); + for (i = oldcount; i < newcount; i++) + if (ubh_isclr (UCPI_UBH, ucpi->c_freeoff, fragno + i)) + return 0; + /* + * Block can be extended + */ + ucg->cg_time = cpu_to_fs32(sb, get_seconds()); + for (i = newcount; i < (uspi->s_fpb - fragoff); i++) + if (ubh_isclr (UCPI_UBH, ucpi->c_freeoff, fragno + i)) + break; + fragsize = i - oldcount; + if (!fs32_to_cpu(sb, ucg->cg_frsum[fragsize])) + ufs_panic (sb, "ufs_add_fragments", + "internal error or corrupted bitmap on cg %u", cgno); + fs32_sub(sb, &ucg->cg_frsum[fragsize], 1); + if (fragsize != count) + fs32_add(sb, &ucg->cg_frsum[fragsize - count], 1); + for (i = oldcount; i < newcount; i++) + ubh_clrbit (UCPI_UBH, ucpi->c_freeoff, fragno + i); + if(DQUOT_ALLOC_BLOCK(inode, count)) { + *err = -EDQUOT; + return 0; + } + + fs32_sub(sb, &ucg->cg_cs.cs_nffree, count); + fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count); + fs32_sub(sb, &usb1->fs_cstotal.cs_nffree, count); + + ubh_mark_buffer_dirty (USPI_UBH); + ubh_mark_buffer_dirty (UCPI_UBH); + if (sb->s_flags & MS_SYNCHRONOUS) { + ubh_wait_on_buffer (UCPI_UBH); + ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **)&ucpi); + ubh_wait_on_buffer (UCPI_UBH); + } + sb->s_dirt = 1; + + UFSD(("EXIT, fragment %u\n", fragment)) + + return fragment; +} + +#define UFS_TEST_FREE_SPACE_CG \ + ucg = (struct ufs_cylinder_group *) UFS_SB(sb)->s_ucg[cgno]->b_data; \ + if (fs32_to_cpu(sb, ucg->cg_cs.cs_nbfree)) \ + goto cg_found; \ + for (k = count; k < uspi->s_fpb; k++) \ + if (fs32_to_cpu(sb, ucg->cg_frsum[k])) \ + goto cg_found; + +static unsigned ufs_alloc_fragments (struct inode * inode, unsigned cgno, + unsigned goal, unsigned count, int * err) +{ + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct ufs_cg_private_info * ucpi; + struct ufs_cylinder_group * ucg; + unsigned oldcg, i, j, k, result, allocsize; + + UFSD(("ENTER, ino %lu, cgno %u, goal %u, count %u\n", inode->i_ino, cgno, goal, count)) + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first(USPI_UBH); + oldcg = cgno; + + /* + * 1. searching on preferred cylinder group + */ + UFS_TEST_FREE_SPACE_CG + + /* + * 2. quadratic rehash + */ + for (j = 1; j < uspi->s_ncg; j *= 2) { + cgno += j; + if (cgno >= uspi->s_ncg) + cgno -= uspi->s_ncg; + UFS_TEST_FREE_SPACE_CG + } + + /* + * 3. brute force search + * We start at i = 2 ( 0 is checked at 1.step, 1 at 2.step ) + */ + cgno = (oldcg + 1) % uspi->s_ncg; + for (j = 2; j < uspi->s_ncg; j++) { + cgno++; + if (cgno >= uspi->s_ncg) + cgno = 0; + UFS_TEST_FREE_SPACE_CG + } + + UFSD(("EXIT (FAILED)\n")) + return 0; + +cg_found: + ucpi = ufs_load_cylinder (sb, cgno); + if (!ucpi) + return 0; + ucg = ubh_get_ucg (UCPI_UBH); + if (!ufs_cg_chkmagic(sb, ucg)) + ufs_panic (sb, "ufs_alloc_fragments", + "internal error, bad magic number on cg %u", cgno); + ucg->cg_time = cpu_to_fs32(sb, get_seconds()); + + if (count == uspi->s_fpb) { + result = ufs_alloccg_block (inode, ucpi, goal, err); + if (result == (unsigned)-1) + return 0; + goto succed; + } + + for (allocsize = count; allocsize < uspi->s_fpb; allocsize++) + if (fs32_to_cpu(sb, ucg->cg_frsum[allocsize]) != 0) + break; + + if (allocsize == uspi->s_fpb) { + result = ufs_alloccg_block (inode, ucpi, goal, err); + if (result == (unsigned)-1) + return 0; + goal = ufs_dtogd (result); + for (i = count; i < uspi->s_fpb; i++) + ubh_setbit (UCPI_UBH, ucpi->c_freeoff, goal + i); + i = uspi->s_fpb - count; + DQUOT_FREE_BLOCK(inode, i); + + fs32_add(sb, &ucg->cg_cs.cs_nffree, i); + fs32_add(sb, &usb1->fs_cstotal.cs_nffree, i); + fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, i); + fs32_add(sb, &ucg->cg_frsum[i], 1); + goto succed; + } + + result = ufs_bitmap_search (sb, ucpi, goal, allocsize); + if (result == (unsigned)-1) + return 0; + if(DQUOT_ALLOC_BLOCK(inode, count)) { + *err = -EDQUOT; + return 0; + } + for (i = 0; i < count; i++) + ubh_clrbit (UCPI_UBH, ucpi->c_freeoff, result + i); + + fs32_sub(sb, &ucg->cg_cs.cs_nffree, count); + fs32_sub(sb, &usb1->fs_cstotal.cs_nffree, count); + fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count); + fs32_sub(sb, &ucg->cg_frsum[allocsize], 1); + + if (count != allocsize) + fs32_add(sb, &ucg->cg_frsum[allocsize - count], 1); + +succed: + ubh_mark_buffer_dirty (USPI_UBH); + ubh_mark_buffer_dirty (UCPI_UBH); + if (sb->s_flags & MS_SYNCHRONOUS) { + ubh_wait_on_buffer (UCPI_UBH); + ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **)&ucpi); + ubh_wait_on_buffer (UCPI_UBH); + } + sb->s_dirt = 1; + + result += cgno * uspi->s_fpg; + UFSD(("EXIT3, result %u\n", result)) + return result; +} + +static unsigned ufs_alloccg_block (struct inode * inode, + struct ufs_cg_private_info * ucpi, unsigned goal, int * err) +{ + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct ufs_cylinder_group * ucg; + unsigned result, cylno, blkno; + + UFSD(("ENTER, goal %u\n", goal)) + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first(USPI_UBH); + ucg = ubh_get_ucg(UCPI_UBH); + + if (goal == 0) { + goal = ucpi->c_rotor; + goto norot; + } + goal = ufs_blknum (goal); + goal = ufs_dtogd (goal); + + /* + * If the requested block is available, use it. + */ + if (ubh_isblockset(UCPI_UBH, ucpi->c_freeoff, ufs_fragstoblks(goal))) { + result = goal; + goto gotit; + } + +norot: + result = ufs_bitmap_search (sb, ucpi, goal, uspi->s_fpb); + if (result == (unsigned)-1) + return (unsigned)-1; + ucpi->c_rotor = result; +gotit: + blkno = ufs_fragstoblks(result); + ubh_clrblock (UCPI_UBH, ucpi->c_freeoff, blkno); + if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD) + ufs_clusteracct (sb, ucpi, blkno, -1); + if(DQUOT_ALLOC_BLOCK(inode, uspi->s_fpb)) { + *err = -EDQUOT; + return (unsigned)-1; + } + + fs32_sub(sb, &ucg->cg_cs.cs_nbfree, 1); + fs32_sub(sb, &usb1->fs_cstotal.cs_nbfree, 1); + fs32_sub(sb, &UFS_SB(sb)->fs_cs(ucpi->c_cgx).cs_nbfree, 1); + cylno = ufs_cbtocylno(result); + fs16_sub(sb, &ubh_cg_blks(ucpi, cylno, ufs_cbtorpos(result)), 1); + fs32_sub(sb, &ubh_cg_blktot(ucpi, cylno), 1); + + UFSD(("EXIT, result %u\n", result)) + + return result; +} + +static unsigned ufs_bitmap_search (struct super_block * sb, + struct ufs_cg_private_info * ucpi, unsigned goal, unsigned count) +{ + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct ufs_cylinder_group * ucg; + unsigned start, length, location, result; + unsigned possition, fragsize, blockmap, mask; + + UFSD(("ENTER, cg %u, goal %u, count %u\n", ucpi->c_cgx, goal, count)) + + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first (USPI_UBH); + ucg = ubh_get_ucg(UCPI_UBH); + + if (goal) + start = ufs_dtogd(goal) >> 3; + else + start = ucpi->c_frotor >> 3; + + length = ((uspi->s_fpg + 7) >> 3) - start; + location = ubh_scanc(UCPI_UBH, ucpi->c_freeoff + start, length, + (uspi->s_fpb == 8) ? ufs_fragtable_8fpb : ufs_fragtable_other, + 1 << (count - 1 + (uspi->s_fpb & 7))); + if (location == 0) { + length = start + 1; + location = ubh_scanc(UCPI_UBH, ucpi->c_freeoff, length, + (uspi->s_fpb == 8) ? ufs_fragtable_8fpb : ufs_fragtable_other, + 1 << (count - 1 + (uspi->s_fpb & 7))); + if (location == 0) { + ufs_error (sb, "ufs_bitmap_search", + "bitmap corrupted on cg %u, start %u, length %u, count %u, freeoff %u\n", + ucpi->c_cgx, start, length, count, ucpi->c_freeoff); + return (unsigned)-1; + } + start = 0; + } + result = (start + length - location) << 3; + ucpi->c_frotor = result; + + /* + * found the byte in the map + */ + blockmap = ubh_blkmap(UCPI_UBH, ucpi->c_freeoff, result); + fragsize = 0; + for (possition = 0, mask = 1; possition < 8; possition++, mask <<= 1) { + if (blockmap & mask) { + if (!(possition & uspi->s_fpbmask)) + fragsize = 1; + else + fragsize++; + } + else { + if (fragsize == count) { + result += possition - count; + UFSD(("EXIT, result %u\n", result)) + return result; + } + fragsize = 0; + } + } + if (fragsize == count) { + result += possition - count; + UFSD(("EXIT, result %u\n", result)) + return result; + } + ufs_error (sb, "ufs_bitmap_search", "block not in map on cg %u\n", ucpi->c_cgx); + UFSD(("EXIT (FAILED)\n")) + return (unsigned)-1; +} + +static void ufs_clusteracct(struct super_block * sb, + struct ufs_cg_private_info * ucpi, unsigned blkno, int cnt) +{ + struct ufs_sb_private_info * uspi; + int i, start, end, forw, back; + + uspi = UFS_SB(sb)->s_uspi; + if (uspi->s_contigsumsize <= 0) + return; + + if (cnt > 0) + ubh_setbit(UCPI_UBH, ucpi->c_clusteroff, blkno); + else + ubh_clrbit(UCPI_UBH, ucpi->c_clusteroff, blkno); + + /* + * Find the size of the cluster going forward. + */ + start = blkno + 1; + end = start + uspi->s_contigsumsize; + if ( end >= ucpi->c_nclusterblks) + end = ucpi->c_nclusterblks; + i = ubh_find_next_zero_bit (UCPI_UBH, ucpi->c_clusteroff, end, start); + if (i > end) + i = end; + forw = i - start; + + /* + * Find the size of the cluster going backward. + */ + start = blkno - 1; + end = start - uspi->s_contigsumsize; + if (end < 0 ) + end = -1; + i = ubh_find_last_zero_bit (UCPI_UBH, ucpi->c_clusteroff, start, end); + if ( i < end) + i = end; + back = start - i; + + /* + * Account for old cluster and the possibly new forward and + * back clusters. + */ + i = back + forw + 1; + if (i > uspi->s_contigsumsize) + i = uspi->s_contigsumsize; + fs32_add(sb, (__fs32*)ubh_get_addr(UCPI_UBH, ucpi->c_clustersumoff + (i << 2)), cnt); + if (back > 0) + fs32_sub(sb, (__fs32*)ubh_get_addr(UCPI_UBH, ucpi->c_clustersumoff + (back << 2)), cnt); + if (forw > 0) + fs32_sub(sb, (__fs32*)ubh_get_addr(UCPI_UBH, ucpi->c_clustersumoff + (forw << 2)), cnt); +} + + +static unsigned char ufs_fragtable_8fpb[] = { + 0x00, 0x01, 0x01, 0x02, 0x01, 0x01, 0x02, 0x04, 0x01, 0x01, 0x01, 0x03, 0x02, 0x03, 0x04, 0x08, + 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x02, 0x03, 0x03, 0x02, 0x04, 0x05, 0x08, 0x10, + 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09, + 0x02, 0x03, 0x03, 0x02, 0x03, 0x03, 0x02, 0x06, 0x04, 0x05, 0x05, 0x06, 0x08, 0x09, 0x10, 0x20, + 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09, + 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x03, 0x03, 0x03, 0x03, 0x05, 0x05, 0x09, 0x11, + 0x02, 0x03, 0x03, 0x02, 0x03, 0x03, 0x02, 0x06, 0x03, 0x03, 0x03, 0x03, 0x02, 0x03, 0x06, 0x0A, + 0x04, 0x05, 0x05, 0x06, 0x05, 0x05, 0x06, 0x04, 0x08, 0x09, 0x09, 0x0A, 0x10, 0x11, 0x20, 0x40, + 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09, + 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x03, 0x03, 0x03, 0x03, 0x05, 0x05, 0x09, 0x11, + 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09, + 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x07, 0x05, 0x05, 0x05, 0x07, 0x09, 0x09, 0x11, 0x21, + 0x02, 0x03, 0x03, 0x02, 0x03, 0x03, 0x02, 0x06, 0x03, 0x03, 0x03, 0x03, 0x02, 0x03, 0x06, 0x0A, + 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x07, 0x02, 0x03, 0x03, 0x02, 0x06, 0x07, 0x0A, 0x12, + 0x04, 0x05, 0x05, 0x06, 0x05, 0x05, 0x06, 0x04, 0x05, 0x05, 0x05, 0x07, 0x06, 0x07, 0x04, 0x0C, + 0x08, 0x09, 0x09, 0x0A, 0x09, 0x09, 0x0A, 0x0C, 0x10, 0x11, 0x11, 0x12, 0x20, 0x21, 0x40, 0x80, +}; + +static unsigned char ufs_fragtable_other[] = { + 0x00, 0x16, 0x16, 0x2A, 0x16, 0x16, 0x26, 0x4E, 0x16, 0x16, 0x16, 0x3E, 0x2A, 0x3E, 0x4E, 0x8A, + 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, + 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, + 0x2A, 0x3E, 0x3E, 0x2A, 0x3E, 0x3E, 0x2E, 0x6E, 0x3E, 0x3E, 0x3E, 0x3E, 0x2A, 0x3E, 0x6E, 0xAA, + 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, + 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, + 0x26, 0x36, 0x36, 0x2E, 0x36, 0x36, 0x26, 0x6E, 0x36, 0x36, 0x36, 0x3E, 0x2E, 0x3E, 0x6E, 0xAE, + 0x4E, 0x5E, 0x5E, 0x6E, 0x5E, 0x5E, 0x6E, 0x4E, 0x5E, 0x5E, 0x5E, 0x7E, 0x6E, 0x7E, 0x4E, 0xCE, + 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, + 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, + 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, + 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0xBE, + 0x2A, 0x3E, 0x3E, 0x2A, 0x3E, 0x3E, 0x2E, 0x6E, 0x3E, 0x3E, 0x3E, 0x3E, 0x2A, 0x3E, 0x6E, 0xAA, + 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0xBE, + 0x4E, 0x5E, 0x5E, 0x6E, 0x5E, 0x5E, 0x6E, 0x4E, 0x5E, 0x5E, 0x5E, 0x7E, 0x6E, 0x7E, 0x4E, 0xCE, + 0x8A, 0x9E, 0x9E, 0xAA, 0x9E, 0x9E, 0xAE, 0xCE, 0x9E, 0x9E, 0x9E, 0xBE, 0xAA, 0xBE, 0xCE, 0x8A, +}; diff --git a/fs/ufs/cylinder.c b/fs/ufs/cylinder.c new file mode 100644 index 0000000..14abb8b --- /dev/null +++ b/fs/ufs/cylinder.c @@ -0,0 +1,209 @@ +/* + * linux/fs/ufs/cylinder.c + * + * Copyright (C) 1998 + * Daniel Pirkl <daniel.pirkl@email.cz> + * Charles University, Faculty of Mathematics and Physics + * + * ext2 - inode (block) bitmap caching inspired + */ + +#include <linux/fs.h> +#include <linux/ufs_fs.h> +#include <linux/time.h> +#include <linux/stat.h> +#include <linux/string.h> +#include <linux/bitops.h> + +#include <asm/byteorder.h> + +#include "swab.h" +#include "util.h" + +#undef UFS_CYLINDER_DEBUG + +#ifdef UFS_CYLINDER_DEBUG +#define UFSD(x) printk("(%s, %d), %s:", __FILE__, __LINE__, __FUNCTION__); printk x; +#else +#define UFSD(x) +#endif + + +/* + * Read cylinder group into cache. The memory space for ufs_cg_private_info + * structure is already allocated during ufs_read_super. + */ +static void ufs_read_cylinder (struct super_block * sb, + unsigned cgno, unsigned bitmap_nr) +{ + struct ufs_sb_info * sbi = UFS_SB(sb); + struct ufs_sb_private_info * uspi; + struct ufs_cg_private_info * ucpi; + struct ufs_cylinder_group * ucg; + unsigned i, j; + + UFSD(("ENTER, cgno %u, bitmap_nr %u\n", cgno, bitmap_nr)) + uspi = sbi->s_uspi; + ucpi = sbi->s_ucpi[bitmap_nr]; + ucg = (struct ufs_cylinder_group *)sbi->s_ucg[cgno]->b_data; + + UCPI_UBH->fragment = ufs_cgcmin(cgno); + UCPI_UBH->count = uspi->s_cgsize >> sb->s_blocksize_bits; + /* + * We have already the first fragment of cylinder group block in buffer + */ + UCPI_UBH->bh[0] = sbi->s_ucg[cgno]; + for (i = 1; i < UCPI_UBH->count; i++) + if (!(UCPI_UBH->bh[i] = sb_bread(sb, UCPI_UBH->fragment + i))) + goto failed; + sbi->s_cgno[bitmap_nr] = cgno; + + ucpi->c_cgx = fs32_to_cpu(sb, ucg->cg_cgx); + ucpi->c_ncyl = fs16_to_cpu(sb, ucg->cg_ncyl); + ucpi->c_niblk = fs16_to_cpu(sb, ucg->cg_niblk); + ucpi->c_ndblk = fs32_to_cpu(sb, ucg->cg_ndblk); + ucpi->c_rotor = fs32_to_cpu(sb, ucg->cg_rotor); + ucpi->c_frotor = fs32_to_cpu(sb, ucg->cg_frotor); + ucpi->c_irotor = fs32_to_cpu(sb, ucg->cg_irotor); + ucpi->c_btotoff = fs32_to_cpu(sb, ucg->cg_btotoff); + ucpi->c_boff = fs32_to_cpu(sb, ucg->cg_boff); + ucpi->c_iusedoff = fs32_to_cpu(sb, ucg->cg_iusedoff); + ucpi->c_freeoff = fs32_to_cpu(sb, ucg->cg_freeoff); + ucpi->c_nextfreeoff = fs32_to_cpu(sb, ucg->cg_nextfreeoff); + ucpi->c_clustersumoff = fs32_to_cpu(sb, ucg->cg_u.cg_44.cg_clustersumoff); + ucpi->c_clusteroff = fs32_to_cpu(sb, ucg->cg_u.cg_44.cg_clusteroff); + ucpi->c_nclusterblks = fs32_to_cpu(sb, ucg->cg_u.cg_44.cg_nclusterblks); + UFSD(("EXIT\n")) + return; + +failed: + for (j = 1; j < i; j++) + brelse (sbi->s_ucg[j]); + sbi->s_cgno[bitmap_nr] = UFS_CGNO_EMPTY; + ufs_error (sb, "ufs_read_cylinder", "can't read cylinder group block %u", cgno); +} + +/* + * Remove cylinder group from cache, doesn't release memory + * allocated for cylinder group (this is done at ufs_put_super only). + */ +void ufs_put_cylinder (struct super_block * sb, unsigned bitmap_nr) +{ + struct ufs_sb_info * sbi = UFS_SB(sb); + struct ufs_sb_private_info * uspi; + struct ufs_cg_private_info * ucpi; + struct ufs_cylinder_group * ucg; + unsigned i; + + UFSD(("ENTER, bitmap_nr %u\n", bitmap_nr)) + + uspi = sbi->s_uspi; + if (sbi->s_cgno[bitmap_nr] == UFS_CGNO_EMPTY) { + UFSD(("EXIT\n")) + return; + } + ucpi = sbi->s_ucpi[bitmap_nr]; + ucg = ubh_get_ucg(UCPI_UBH); + + if (uspi->s_ncg > UFS_MAX_GROUP_LOADED && bitmap_nr >= sbi->s_cg_loaded) { + ufs_panic (sb, "ufs_put_cylinder", "internal error"); + return; + } + /* + * rotor is not so important data, so we put it to disk + * at the end of working with cylinder + */ + ucg->cg_rotor = cpu_to_fs32(sb, ucpi->c_rotor); + ucg->cg_frotor = cpu_to_fs32(sb, ucpi->c_frotor); + ucg->cg_irotor = cpu_to_fs32(sb, ucpi->c_irotor); + ubh_mark_buffer_dirty (UCPI_UBH); + for (i = 1; i < UCPI_UBH->count; i++) { + brelse (UCPI_UBH->bh[i]); + } + + sbi->s_cgno[bitmap_nr] = UFS_CGNO_EMPTY; + UFSD(("EXIT\n")) +} + +/* + * Find cylinder group in cache and return it as pointer. + * If cylinder group is not in cache, we will load it from disk. + * + * The cache is managed by LRU algorithm. + */ +struct ufs_cg_private_info * ufs_load_cylinder ( + struct super_block * sb, unsigned cgno) +{ + struct ufs_sb_info * sbi = UFS_SB(sb); + struct ufs_sb_private_info * uspi; + struct ufs_cg_private_info * ucpi; + unsigned cg, i, j; + + UFSD(("ENTER, cgno %u\n", cgno)) + + uspi = sbi->s_uspi; + if (cgno >= uspi->s_ncg) { + ufs_panic (sb, "ufs_load_cylinder", "internal error, high number of cg"); + return NULL; + } + /* + * Cylinder group number cg it in cache and it was last used + */ + if (sbi->s_cgno[0] == cgno) { + UFSD(("EXIT\n")) + return sbi->s_ucpi[0]; + } + /* + * Number of cylinder groups is not higher than UFS_MAX_GROUP_LOADED + */ + if (uspi->s_ncg <= UFS_MAX_GROUP_LOADED) { + if (sbi->s_cgno[cgno] != UFS_CGNO_EMPTY) { + if (sbi->s_cgno[cgno] != cgno) { + ufs_panic (sb, "ufs_load_cylinder", "internal error, wrong number of cg in cache"); + UFSD(("EXIT (FAILED)\n")) + return NULL; + } + else { + UFSD(("EXIT\n")) + return sbi->s_ucpi[cgno]; + } + } else { + ufs_read_cylinder (sb, cgno, cgno); + UFSD(("EXIT\n")) + return sbi->s_ucpi[cgno]; + } + } + /* + * Cylinder group number cg is in cache but it was not last used, + * we will move to the first position + */ + for (i = 0; i < sbi->s_cg_loaded && sbi->s_cgno[i] != cgno; i++); + if (i < sbi->s_cg_loaded && sbi->s_cgno[i] == cgno) { + cg = sbi->s_cgno[i]; + ucpi = sbi->s_ucpi[i]; + for (j = i; j > 0; j--) { + sbi->s_cgno[j] = sbi->s_cgno[j-1]; + sbi->s_ucpi[j] = sbi->s_ucpi[j-1]; + } + sbi->s_cgno[0] = cg; + sbi->s_ucpi[0] = ucpi; + /* + * Cylinder group number cg is not in cache, we will read it from disk + * and put it to the first position + */ + } else { + if (sbi->s_cg_loaded < UFS_MAX_GROUP_LOADED) + sbi->s_cg_loaded++; + else + ufs_put_cylinder (sb, UFS_MAX_GROUP_LOADED-1); + ucpi = sbi->s_ucpi[sbi->s_cg_loaded - 1]; + for (j = sbi->s_cg_loaded - 1; j > 0; j--) { + sbi->s_cgno[j] = sbi->s_cgno[j-1]; + sbi->s_ucpi[j] = sbi->s_ucpi[j-1]; + } + sbi->s_ucpi[0] = ucpi; + ufs_read_cylinder (sb, cgno, 0); + } + UFSD(("EXIT\n")) + return sbi->s_ucpi[0]; +} diff --git a/fs/ufs/dir.c b/fs/ufs/dir.c new file mode 100644 index 0000000..d0915fb --- /dev/null +++ b/fs/ufs/dir.c @@ -0,0 +1,627 @@ +/* + * linux/fs/ufs/ufs_dir.c + * + * Copyright (C) 1996 + * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu) + * Laboratory for Computer Science Research Computing Facility + * Rutgers, The State University of New Jersey + * + * swab support by Francois-Rene Rideau <fare@tunes.org> 19970406 + * + * 4.4BSD (FreeBSD) support added on February 1st 1998 by + * Niels Kristian Bech Jensen <nkbj@image.dk> partially based + * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>. + */ + +#include <linux/time.h> +#include <linux/fs.h> +#include <linux/ufs_fs.h> +#include <linux/smp_lock.h> +#include <linux/buffer_head.h> +#include <linux/sched.h> + +#include "swab.h" +#include "util.h" + +#undef UFS_DIR_DEBUG + +#ifdef UFS_DIR_DEBUG +#define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x; +#else +#define UFSD(x) +#endif + +static int +ufs_check_dir_entry (const char *, struct inode *, struct ufs_dir_entry *, + struct buffer_head *, unsigned long); + + +/* + * NOTE! unlike strncmp, ufs_match returns 1 for success, 0 for failure. + * + * len <= UFS_MAXNAMLEN and de != NULL are guaranteed by caller. + */ +static inline int ufs_match(struct super_block *sb, int len, + const char * const name, struct ufs_dir_entry * de) +{ + if (len != ufs_get_de_namlen(sb, de)) + return 0; + if (!de->d_ino) + return 0; + return !memcmp(name, de->d_name, len); +} + +/* + * This is blatantly stolen from ext2fs + */ +static int +ufs_readdir (struct file * filp, void * dirent, filldir_t filldir) +{ + struct inode *inode = filp->f_dentry->d_inode; + int error = 0; + unsigned long offset, lblk; + int i, stored; + struct buffer_head * bh; + struct ufs_dir_entry * de; + struct super_block * sb; + int de_reclen; + unsigned flags; + u64 blk= 0L; + + lock_kernel(); + + sb = inode->i_sb; + flags = UFS_SB(sb)->s_flags; + + UFSD(("ENTER, ino %lu f_pos %lu\n", inode->i_ino, (unsigned long) filp->f_pos)) + + stored = 0; + bh = NULL; + offset = filp->f_pos & (sb->s_blocksize - 1); + + while (!error && !stored && filp->f_pos < inode->i_size) { + lblk = (filp->f_pos) >> sb->s_blocksize_bits; + blk = ufs_frag_map(inode, lblk); + if (!blk || !(bh = sb_bread(sb, blk))) { + /* XXX - error - skip to the next block */ + printk("ufs_readdir: " + "dir inode %lu has a hole at offset %lu\n", + inode->i_ino, (unsigned long int)filp->f_pos); + filp->f_pos += sb->s_blocksize - offset; + continue; + } + +revalidate: + /* If the dir block has changed since the last call to + * readdir(2), then we might be pointing to an invalid + * dirent right now. Scan from the start of the block + * to make sure. */ + if (filp->f_version != inode->i_version) { + for (i = 0; i < sb->s_blocksize && i < offset; ) { + de = (struct ufs_dir_entry *)(bh->b_data + i); + /* It's too expensive to do a full + * dirent test each time round this + * loop, but we do have to test at + * least that it is non-zero. A + * failure will be detected in the + * dirent test below. */ + de_reclen = fs16_to_cpu(sb, de->d_reclen); + if (de_reclen < 1) + break; + i += de_reclen; + } + offset = i; + filp->f_pos = (filp->f_pos & ~(sb->s_blocksize - 1)) + | offset; + filp->f_version = inode->i_version; + } + + while (!error && filp->f_pos < inode->i_size + && offset < sb->s_blocksize) { + de = (struct ufs_dir_entry *) (bh->b_data + offset); + /* XXX - put in a real ufs_check_dir_entry() */ + if ((de->d_reclen == 0) || (ufs_get_de_namlen(sb, de) == 0)) { + filp->f_pos = (filp->f_pos & + (sb->s_blocksize - 1)) + + sb->s_blocksize; + brelse(bh); + unlock_kernel(); + return stored; + } + if (!ufs_check_dir_entry ("ufs_readdir", inode, de, + bh, offset)) { + /* On error, skip the f_pos to the + next block. */ + filp->f_pos = (filp->f_pos | + (sb->s_blocksize - 1)) + + 1; + brelse (bh); + unlock_kernel(); + return stored; + } + offset += fs16_to_cpu(sb, de->d_reclen); + if (de->d_ino) { + /* We might block in the next section + * if the data destination is + * currently swapped out. So, use a + * version stamp to detect whether or + * not the directory has been modified + * during the copy operation. */ + unsigned long version = filp->f_version; + unsigned char d_type = DT_UNKNOWN; + + UFSD(("filldir(%s,%u)\n", de->d_name, + fs32_to_cpu(sb, de->d_ino))) + UFSD(("namlen %u\n", ufs_get_de_namlen(sb, de))) + + if ((flags & UFS_DE_MASK) == UFS_DE_44BSD) + d_type = de->d_u.d_44.d_type; + error = filldir(dirent, de->d_name, + ufs_get_de_namlen(sb, de), filp->f_pos, + fs32_to_cpu(sb, de->d_ino), d_type); + if (error) + break; + if (version != filp->f_version) + goto revalidate; + stored ++; + } + filp->f_pos += fs16_to_cpu(sb, de->d_reclen); + } + offset = 0; + brelse (bh); + } + unlock_kernel(); + return 0; +} + +/* + * define how far ahead to read directories while searching them. + */ +#define NAMEI_RA_CHUNKS 2 +#define NAMEI_RA_BLOCKS 4 +#define NAMEI_RA_SIZE (NAMEI_RA_CHUNKS * NAMEI_RA_BLOCKS) +#define NAMEI_RA_INDEX(c,b) (((c) * NAMEI_RA_BLOCKS) + (b)) + +/* + * ufs_find_entry() + * + * finds an entry in the specified directory with the wanted name. It + * returns the cache buffer in which the entry was found, and the entry + * itself (as a parameter - res_bh). It does NOT read the inode of the + * entry - you'll have to do that yourself if you want to. + */ +struct ufs_dir_entry * ufs_find_entry (struct dentry *dentry, + struct buffer_head ** res_bh) +{ + struct super_block * sb; + struct buffer_head * bh_use[NAMEI_RA_SIZE]; + struct buffer_head * bh_read[NAMEI_RA_SIZE]; + unsigned long offset; + int block, toread, i, err; + struct inode *dir = dentry->d_parent->d_inode; + const char *name = dentry->d_name.name; + int namelen = dentry->d_name.len; + + UFSD(("ENTER, dir_ino %lu, name %s, namlen %u\n", dir->i_ino, name, namelen)) + + *res_bh = NULL; + + sb = dir->i_sb; + + if (namelen > UFS_MAXNAMLEN) + return NULL; + + memset (bh_use, 0, sizeof (bh_use)); + toread = 0; + for (block = 0; block < NAMEI_RA_SIZE; ++block) { + struct buffer_head * bh; + + if ((block << sb->s_blocksize_bits) >= dir->i_size) + break; + bh = ufs_getfrag (dir, block, 0, &err); + bh_use[block] = bh; + if (bh && !buffer_uptodate(bh)) + bh_read[toread++] = bh; + } + + for (block = 0, offset = 0; offset < dir->i_size; block++) { + struct buffer_head * bh; + struct ufs_dir_entry * de; + char * dlimit; + + if ((block % NAMEI_RA_BLOCKS) == 0 && toread) { + ll_rw_block (READ, toread, bh_read); + toread = 0; + } + bh = bh_use[block % NAMEI_RA_SIZE]; + if (!bh) { + ufs_error (sb, "ufs_find_entry", + "directory #%lu contains a hole at offset %lu", + dir->i_ino, offset); + offset += sb->s_blocksize; + continue; + } + wait_on_buffer (bh); + if (!buffer_uptodate(bh)) { + /* + * read error: all bets are off + */ + break; + } + + de = (struct ufs_dir_entry *) bh->b_data; + dlimit = bh->b_data + sb->s_blocksize; + while ((char *) de < dlimit && offset < dir->i_size) { + /* this code is executed quadratically often */ + /* do minimal checking by hand */ + int de_len; + + if ((char *) de + namelen <= dlimit && + ufs_match(sb, namelen, name, de)) { + /* found a match - + just to be sure, do a full check */ + if (!ufs_check_dir_entry("ufs_find_entry", + dir, de, bh, offset)) + goto failed; + for (i = 0; i < NAMEI_RA_SIZE; ++i) { + if (bh_use[i] != bh) + brelse (bh_use[i]); + } + *res_bh = bh; + return de; + } + /* prevent looping on a bad block */ + de_len = fs16_to_cpu(sb, de->d_reclen); + if (de_len <= 0) + goto failed; + offset += de_len; + de = (struct ufs_dir_entry *) ((char *) de + de_len); + } + + brelse (bh); + if (((block + NAMEI_RA_SIZE) << sb->s_blocksize_bits ) >= + dir->i_size) + bh = NULL; + else + bh = ufs_getfrag (dir, block + NAMEI_RA_SIZE, 0, &err); + bh_use[block % NAMEI_RA_SIZE] = bh; + if (bh && !buffer_uptodate(bh)) + bh_read[toread++] = bh; + } + +failed: + for (i = 0; i < NAMEI_RA_SIZE; ++i) brelse (bh_use[i]); + UFSD(("EXIT\n")) + return NULL; +} + +static int +ufs_check_dir_entry (const char *function, struct inode *dir, + struct ufs_dir_entry *de, struct buffer_head *bh, + unsigned long offset) +{ + struct super_block *sb = dir->i_sb; + const char *error_msg = NULL; + int rlen = fs16_to_cpu(sb, de->d_reclen); + + if (rlen < UFS_DIR_REC_LEN(1)) + error_msg = "reclen is smaller than minimal"; + else if (rlen % 4 != 0) + error_msg = "reclen % 4 != 0"; + else if (rlen < UFS_DIR_REC_LEN(ufs_get_de_namlen(sb, de))) + error_msg = "reclen is too small for namlen"; + else if (((char *) de - bh->b_data) + rlen > dir->i_sb->s_blocksize) + error_msg = "directory entry across blocks"; + else if (fs32_to_cpu(sb, de->d_ino) > (UFS_SB(sb)->s_uspi->s_ipg * + UFS_SB(sb)->s_uspi->s_ncg)) + error_msg = "inode out of bounds"; + + if (error_msg != NULL) + ufs_error (sb, function, "bad entry in directory #%lu, size %Lu: %s - " + "offset=%lu, inode=%lu, reclen=%d, namlen=%d", + dir->i_ino, dir->i_size, error_msg, offset, + (unsigned long)fs32_to_cpu(sb, de->d_ino), + rlen, ufs_get_de_namlen(sb, de)); + + return (error_msg == NULL ? 1 : 0); +} + +struct ufs_dir_entry *ufs_dotdot(struct inode *dir, struct buffer_head **p) +{ + int err; + struct buffer_head *bh = ufs_bread (dir, 0, 0, &err); + struct ufs_dir_entry *res = NULL; + + if (bh) { + res = (struct ufs_dir_entry *) bh->b_data; + res = (struct ufs_dir_entry *)((char *)res + + fs16_to_cpu(dir->i_sb, res->d_reclen)); + } + *p = bh; + return res; +} +ino_t ufs_inode_by_name(struct inode * dir, struct dentry *dentry) +{ + ino_t res = 0; + struct ufs_dir_entry * de; + struct buffer_head *bh; + + de = ufs_find_entry (dentry, &bh); + if (de) { + res = fs32_to_cpu(dir->i_sb, de->d_ino); + brelse(bh); + } + return res; +} + +void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de, + struct buffer_head *bh, struct inode *inode) +{ + dir->i_version++; + de->d_ino = cpu_to_fs32(dir->i_sb, inode->i_ino); + mark_buffer_dirty(bh); + if (IS_DIRSYNC(dir)) + sync_dirty_buffer(bh); + brelse (bh); +} + +/* + * ufs_add_entry() + * + * adds a file entry to the specified directory, using the same + * semantics as ufs_find_entry(). It returns NULL if it failed. + */ +int ufs_add_link(struct dentry *dentry, struct inode *inode) +{ + struct super_block * sb; + struct ufs_sb_private_info * uspi; + unsigned long offset; + unsigned fragoff; + unsigned short rec_len; + struct buffer_head * bh; + struct ufs_dir_entry * de, * de1; + struct inode *dir = dentry->d_parent->d_inode; + const char *name = dentry->d_name.name; + int namelen = dentry->d_name.len; + int err; + + UFSD(("ENTER, name %s, namelen %u\n", name, namelen)) + + sb = dir->i_sb; + uspi = UFS_SB(sb)->s_uspi; + + if (!namelen) + return -EINVAL; + bh = ufs_bread (dir, 0, 0, &err); + if (!bh) + return err; + rec_len = UFS_DIR_REC_LEN(namelen); + offset = 0; + de = (struct ufs_dir_entry *) bh->b_data; + while (1) { + if ((char *)de >= UFS_SECTOR_SIZE + bh->b_data) { + fragoff = offset & ~uspi->s_fmask; + if (fragoff != 0 && fragoff != UFS_SECTOR_SIZE) + ufs_error (sb, "ufs_add_entry", "internal error" + " fragoff %u", fragoff); + if (!fragoff) { + brelse (bh); + bh = ufs_bread (dir, offset >> sb->s_blocksize_bits, 1, &err); + if (!bh) + return err; + } + if (dir->i_size <= offset) { + if (dir->i_size == 0) { + brelse(bh); + return -ENOENT; + } + de = (struct ufs_dir_entry *) (bh->b_data + fragoff); + de->d_ino = 0; + de->d_reclen = cpu_to_fs16(sb, UFS_SECTOR_SIZE); + ufs_set_de_namlen(sb, de, 0); + dir->i_size = offset + UFS_SECTOR_SIZE; + mark_inode_dirty(dir); + } else { + de = (struct ufs_dir_entry *) bh->b_data; + } + } + if (!ufs_check_dir_entry ("ufs_add_entry", dir, de, bh, offset)) { + brelse (bh); + return -ENOENT; + } + if (ufs_match(sb, namelen, name, de)) { + brelse (bh); + return -EEXIST; + } + if (de->d_ino == 0 && fs16_to_cpu(sb, de->d_reclen) >= rec_len) + break; + + if (fs16_to_cpu(sb, de->d_reclen) >= + UFS_DIR_REC_LEN(ufs_get_de_namlen(sb, de)) + rec_len) + break; + offset += fs16_to_cpu(sb, de->d_reclen); + de = (struct ufs_dir_entry *) ((char *) de + fs16_to_cpu(sb, de->d_reclen)); + } + + if (de->d_ino) { + de1 = (struct ufs_dir_entry *) ((char *) de + + UFS_DIR_REC_LEN(ufs_get_de_namlen(sb, de))); + de1->d_reclen = + cpu_to_fs16(sb, fs16_to_cpu(sb, de->d_reclen) - + UFS_DIR_REC_LEN(ufs_get_de_namlen(sb, de))); + de->d_reclen = + cpu_to_fs16(sb, UFS_DIR_REC_LEN(ufs_get_de_namlen(sb, de))); + de = de1; + } + de->d_ino = 0; + ufs_set_de_namlen(sb, de, namelen); + memcpy (de->d_name, name, namelen + 1); + de->d_ino = cpu_to_fs32(sb, inode->i_ino); + ufs_set_de_type(sb, de, inode->i_mode); + mark_buffer_dirty(bh); + if (IS_DIRSYNC(dir)) + sync_dirty_buffer(bh); + brelse (bh); + dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; + dir->i_version++; + mark_inode_dirty(dir); + + UFSD(("EXIT\n")) + return 0; +} + +/* + * ufs_delete_entry deletes a directory entry by merging it with the + * previous entry. + */ +int ufs_delete_entry (struct inode * inode, struct ufs_dir_entry * dir, + struct buffer_head * bh ) + +{ + struct super_block * sb; + struct ufs_dir_entry * de, * pde; + unsigned i; + + UFSD(("ENTER\n")) + + sb = inode->i_sb; + i = 0; + pde = NULL; + de = (struct ufs_dir_entry *) bh->b_data; + + UFSD(("ino %u, reclen %u, namlen %u, name %s\n", + fs32_to_cpu(sb, de->d_ino), + fs16to_cpu(sb, de->d_reclen), + ufs_get_de_namlen(sb, de), de->d_name)) + + while (i < bh->b_size) { + if (!ufs_check_dir_entry ("ufs_delete_entry", inode, de, bh, i)) { + brelse(bh); + return -EIO; + } + if (de == dir) { + if (pde) + fs16_add(sb, &pde->d_reclen, + fs16_to_cpu(sb, dir->d_reclen)); + dir->d_ino = 0; + inode->i_version++; + inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC; + mark_inode_dirty(inode); + mark_buffer_dirty(bh); + if (IS_DIRSYNC(inode)) + sync_dirty_buffer(bh); + brelse(bh); + UFSD(("EXIT\n")) + return 0; + } + i += fs16_to_cpu(sb, de->d_reclen); + if (i == UFS_SECTOR_SIZE) pde = NULL; + else pde = de; + de = (struct ufs_dir_entry *) + ((char *) de + fs16_to_cpu(sb, de->d_reclen)); + if (i == UFS_SECTOR_SIZE && de->d_reclen == 0) + break; + } + UFSD(("EXIT\n")) + brelse(bh); + return -ENOENT; +} + +int ufs_make_empty(struct inode * inode, struct inode *dir) +{ + struct super_block * sb = dir->i_sb; + struct buffer_head * dir_block; + struct ufs_dir_entry * de; + int err; + + dir_block = ufs_bread (inode, 0, 1, &err); + if (!dir_block) + return err; + + inode->i_blocks = sb->s_blocksize / UFS_SECTOR_SIZE; + de = (struct ufs_dir_entry *) dir_block->b_data; + de->d_ino = cpu_to_fs32(sb, inode->i_ino); + ufs_set_de_type(sb, de, inode->i_mode); + ufs_set_de_namlen(sb, de, 1); + de->d_reclen = cpu_to_fs16(sb, UFS_DIR_REC_LEN(1)); + strcpy (de->d_name, "."); + de = (struct ufs_dir_entry *) + ((char *)de + fs16_to_cpu(sb, de->d_reclen)); + de->d_ino = cpu_to_fs32(sb, dir->i_ino); + ufs_set_de_type(sb, de, dir->i_mode); + de->d_reclen = cpu_to_fs16(sb, UFS_SECTOR_SIZE - UFS_DIR_REC_LEN(1)); + ufs_set_de_namlen(sb, de, 2); + strcpy (de->d_name, ".."); + mark_buffer_dirty(dir_block); + brelse (dir_block); + mark_inode_dirty(inode); + return 0; +} + +/* + * routine to check that the specified directory is empty (for rmdir) + */ +int ufs_empty_dir (struct inode * inode) +{ + struct super_block * sb; + unsigned long offset; + struct buffer_head * bh; + struct ufs_dir_entry * de, * de1; + int err; + + sb = inode->i_sb; + + if (inode->i_size < UFS_DIR_REC_LEN(1) + UFS_DIR_REC_LEN(2) || + !(bh = ufs_bread (inode, 0, 0, &err))) { + ufs_warning (inode->i_sb, "empty_dir", + "bad directory (dir #%lu) - no data block", + inode->i_ino); + return 1; + } + de = (struct ufs_dir_entry *) bh->b_data; + de1 = (struct ufs_dir_entry *) + ((char *)de + fs16_to_cpu(sb, de->d_reclen)); + if (fs32_to_cpu(sb, de->d_ino) != inode->i_ino || de1->d_ino == 0 || + strcmp (".", de->d_name) || strcmp ("..", de1->d_name)) { + ufs_warning (inode->i_sb, "empty_dir", + "bad directory (dir #%lu) - no `.' or `..'", + inode->i_ino); + return 1; + } + offset = fs16_to_cpu(sb, de->d_reclen) + fs16_to_cpu(sb, de1->d_reclen); + de = (struct ufs_dir_entry *) + ((char *)de1 + fs16_to_cpu(sb, de1->d_reclen)); + while (offset < inode->i_size ) { + if (!bh || (void *) de >= (void *) (bh->b_data + sb->s_blocksize)) { + brelse (bh); + bh = ufs_bread (inode, offset >> sb->s_blocksize_bits, 1, &err); + if (!bh) { + ufs_error (sb, "empty_dir", + "directory #%lu contains a hole at offset %lu", + inode->i_ino, offset); + offset += sb->s_blocksize; + continue; + } + de = (struct ufs_dir_entry *) bh->b_data; + } + if (!ufs_check_dir_entry ("empty_dir", inode, de, bh, offset)) { + brelse (bh); + return 1; + } + if (de->d_ino) { + brelse (bh); + return 0; + } + offset += fs16_to_cpu(sb, de->d_reclen); + de = (struct ufs_dir_entry *) + ((char *)de + fs16_to_cpu(sb, de->d_reclen)); + } + brelse (bh); + return 1; +} + +struct file_operations ufs_dir_operations = { + .read = generic_read_dir, + .readdir = ufs_readdir, + .fsync = file_fsync, +}; diff --git a/fs/ufs/file.c b/fs/ufs/file.c new file mode 100644 index 0000000..ed69d7fe --- /dev/null +++ b/fs/ufs/file.c @@ -0,0 +1,55 @@ +/* + * linux/fs/ufs/file.c + * + * Copyright (C) 1998 + * Daniel Pirkl <daniel.pirkl@email.cz> + * Charles University, Faculty of Mathematics and Physics + * + * from + * + * linux/fs/ext2/file.c + * + * Copyright (C) 1992, 1993, 1994, 1995 + * Remy Card (card@masi.ibp.fr) + * Laboratoire MASI - Institut Blaise Pascal + * Universite Pierre et Marie Curie (Paris VI) + * + * from + * + * linux/fs/minix/file.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * ext2 fs regular file handling primitives + */ + +#include <asm/uaccess.h> +#include <asm/system.h> + +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/ufs_fs.h> +#include <linux/fcntl.h> +#include <linux/time.h> +#include <linux/stat.h> +#include <linux/mm.h> +#include <linux/pagemap.h> +#include <linux/smp_lock.h> + +/* + * We have mostly NULL's here: the current defaults are ok for + * the ufs filesystem. + */ + +struct file_operations ufs_file_operations = { + .llseek = generic_file_llseek, + .read = generic_file_read, + .write = generic_file_write, + .mmap = generic_file_mmap, + .open = generic_file_open, + .sendfile = generic_file_sendfile, +}; + +struct inode_operations ufs_file_inode_operations = { + .truncate = ufs_truncate, +}; diff --git a/fs/ufs/ialloc.c b/fs/ufs/ialloc.c new file mode 100644 index 0000000..61a6b15 --- /dev/null +++ b/fs/ufs/ialloc.c @@ -0,0 +1,302 @@ +/* + * linux/fs/ufs/ialloc.c + * + * Copyright (c) 1998 + * Daniel Pirkl <daniel.pirkl@email.cz> + * Charles University, Faculty of Mathematics and Physics + * + * from + * + * linux/fs/ext2/ialloc.c + * + * Copyright (C) 1992, 1993, 1994, 1995 + * Remy Card (card@masi.ibp.fr) + * Laboratoire MASI - Institut Blaise Pascal + * Universite Pierre et Marie Curie (Paris VI) + * + * BSD ufs-inspired inode and directory allocation by + * Stephen Tweedie (sct@dcs.ed.ac.uk), 1993 + * Big-endian to little-endian byte-swapping/bitmaps by + * David S. Miller (davem@caip.rutgers.edu), 1995 + */ + +#include <linux/fs.h> +#include <linux/ufs_fs.h> +#include <linux/time.h> +#include <linux/stat.h> +#include <linux/string.h> +#include <linux/quotaops.h> +#include <linux/buffer_head.h> +#include <linux/sched.h> +#include <linux/bitops.h> +#include <asm/byteorder.h> + +#include "swab.h" +#include "util.h" + +#undef UFS_IALLOC_DEBUG + +#ifdef UFS_IALLOC_DEBUG +#define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x; +#else +#define UFSD(x) +#endif + +/* + * NOTE! When we get the inode, we're the only people + * that have access to it, and as such there are no + * race conditions we have to worry about. The inode + * is not on the hash-lists, and it cannot be reached + * through the filesystem because the directory entry + * has been deleted earlier. + * + * HOWEVER: we must make sure that we get no aliases, + * which means that we have to call "clear_inode()" + * _before_ we mark the inode not in use in the inode + * bitmaps. Otherwise a newly created file might use + * the same inode number (not actually the same pointer + * though), and then we'd have two inodes sharing the + * same inode number and space on the harddisk. + */ +void ufs_free_inode (struct inode * inode) +{ + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct ufs_cg_private_info * ucpi; + struct ufs_cylinder_group * ucg; + int is_directory; + unsigned ino, cg, bit; + + UFSD(("ENTER, ino %lu\n", inode->i_ino)) + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first(USPI_UBH); + + ino = inode->i_ino; + + lock_super (sb); + + if (!((ino > 1) && (ino < (uspi->s_ncg * uspi->s_ipg )))) { + ufs_warning(sb, "ufs_free_inode", "reserved inode or nonexistent inode %u\n", ino); + unlock_super (sb); + return; + } + + cg = ufs_inotocg (ino); + bit = ufs_inotocgoff (ino); + ucpi = ufs_load_cylinder (sb, cg); + if (!ucpi) { + unlock_super (sb); + return; + } + ucg = ubh_get_ucg(UCPI_UBH); + if (!ufs_cg_chkmagic(sb, ucg)) + ufs_panic (sb, "ufs_free_fragments", "internal error, bad cg magic number"); + + ucg->cg_time = cpu_to_fs32(sb, get_seconds()); + + is_directory = S_ISDIR(inode->i_mode); + + DQUOT_FREE_INODE(inode); + DQUOT_DROP(inode); + + clear_inode (inode); + + if (ubh_isclr (UCPI_UBH, ucpi->c_iusedoff, bit)) + ufs_error(sb, "ufs_free_inode", "bit already cleared for inode %u", ino); + else { + ubh_clrbit (UCPI_UBH, ucpi->c_iusedoff, bit); + if (ino < ucpi->c_irotor) + ucpi->c_irotor = ino; + fs32_add(sb, &ucg->cg_cs.cs_nifree, 1); + fs32_add(sb, &usb1->fs_cstotal.cs_nifree, 1); + fs32_add(sb, &UFS_SB(sb)->fs_cs(cg).cs_nifree, 1); + + if (is_directory) { + fs32_sub(sb, &ucg->cg_cs.cs_ndir, 1); + fs32_sub(sb, &usb1->fs_cstotal.cs_ndir, 1); + fs32_sub(sb, &UFS_SB(sb)->fs_cs(cg).cs_ndir, 1); + } + } + + ubh_mark_buffer_dirty (USPI_UBH); + ubh_mark_buffer_dirty (UCPI_UBH); + if (sb->s_flags & MS_SYNCHRONOUS) { + ubh_wait_on_buffer (UCPI_UBH); + ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **) &ucpi); + ubh_wait_on_buffer (UCPI_UBH); + } + + sb->s_dirt = 1; + unlock_super (sb); + UFSD(("EXIT\n")) +} + +/* + * There are two policies for allocating an inode. If the new inode is + * a directory, then a forward search is made for a block group with both + * free space and a low directory-to-inode ratio; if that fails, then of + * the groups with above-average free space, that group with the fewest + * directories already is chosen. + * + * For other inodes, search forward from the parent directory's block + * group to find a free inode. + */ +struct inode * ufs_new_inode(struct inode * dir, int mode) +{ + struct super_block * sb; + struct ufs_sb_info * sbi; + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct ufs_cg_private_info * ucpi; + struct ufs_cylinder_group * ucg; + struct inode * inode; + unsigned cg, bit, i, j, start; + struct ufs_inode_info *ufsi; + + UFSD(("ENTER\n")) + + /* Cannot create files in a deleted directory */ + if (!dir || !dir->i_nlink) + return ERR_PTR(-EPERM); + sb = dir->i_sb; + inode = new_inode(sb); + if (!inode) + return ERR_PTR(-ENOMEM); + ufsi = UFS_I(inode); + sbi = UFS_SB(sb); + uspi = sbi->s_uspi; + usb1 = ubh_get_usb_first(USPI_UBH); + + lock_super (sb); + + /* + * Try to place the inode in its parent directory + */ + i = ufs_inotocg(dir->i_ino); + if (sbi->fs_cs(i).cs_nifree) { + cg = i; + goto cg_found; + } + + /* + * Use a quadratic hash to find a group with a free inode + */ + for ( j = 1; j < uspi->s_ncg; j <<= 1 ) { + i += j; + if (i >= uspi->s_ncg) + i -= uspi->s_ncg; + if (sbi->fs_cs(i).cs_nifree) { + cg = i; + goto cg_found; + } + } + + /* + * That failed: try linear search for a free inode + */ + i = ufs_inotocg(dir->i_ino) + 1; + for (j = 2; j < uspi->s_ncg; j++) { + i++; + if (i >= uspi->s_ncg) + i = 0; + if (sbi->fs_cs(i).cs_nifree) { + cg = i; + goto cg_found; + } + } + + goto failed; + +cg_found: + ucpi = ufs_load_cylinder (sb, cg); + if (!ucpi) + goto failed; + ucg = ubh_get_ucg(UCPI_UBH); + if (!ufs_cg_chkmagic(sb, ucg)) + ufs_panic (sb, "ufs_new_inode", "internal error, bad cg magic number"); + + start = ucpi->c_irotor; + bit = ubh_find_next_zero_bit (UCPI_UBH, ucpi->c_iusedoff, uspi->s_ipg, start); + if (!(bit < uspi->s_ipg)) { + bit = ubh_find_first_zero_bit (UCPI_UBH, ucpi->c_iusedoff, start); + if (!(bit < start)) { + ufs_error (sb, "ufs_new_inode", + "cylinder group %u corrupted - error in inode bitmap\n", cg); + goto failed; + } + } + UFSD(("start = %u, bit = %u, ipg = %u\n", start, bit, uspi->s_ipg)) + if (ubh_isclr (UCPI_UBH, ucpi->c_iusedoff, bit)) + ubh_setbit (UCPI_UBH, ucpi->c_iusedoff, bit); + else { + ufs_panic (sb, "ufs_new_inode", "internal error"); + goto failed; + } + + fs32_sub(sb, &ucg->cg_cs.cs_nifree, 1); + fs32_sub(sb, &usb1->fs_cstotal.cs_nifree, 1); + fs32_sub(sb, &sbi->fs_cs(cg).cs_nifree, 1); + + if (S_ISDIR(mode)) { + fs32_add(sb, &ucg->cg_cs.cs_ndir, 1); + fs32_add(sb, &usb1->fs_cstotal.cs_ndir, 1); + fs32_add(sb, &sbi->fs_cs(cg).cs_ndir, 1); + } + + ubh_mark_buffer_dirty (USPI_UBH); + ubh_mark_buffer_dirty (UCPI_UBH); + if (sb->s_flags & MS_SYNCHRONOUS) { + ubh_wait_on_buffer (UCPI_UBH); + ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **) &ucpi); + ubh_wait_on_buffer (UCPI_UBH); + } + sb->s_dirt = 1; + + inode->i_mode = mode; + inode->i_uid = current->fsuid; + 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; + + inode->i_ino = cg * uspi->s_ipg + bit; + inode->i_blksize = PAGE_SIZE; /* This is the optimal IO size (for stat), not the fs block size */ + inode->i_blocks = 0; + inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC; + ufsi->i_flags = UFS_I(dir)->i_flags; + ufsi->i_lastfrag = 0; + ufsi->i_gen = 0; + ufsi->i_shadow = 0; + ufsi->i_osync = 0; + ufsi->i_oeftflag = 0; + memset(&ufsi->i_u1, 0, sizeof(ufsi->i_u1)); + + insert_inode_hash(inode); + mark_inode_dirty(inode); + + unlock_super (sb); + + if (DQUOT_ALLOC_INODE(inode)) { + DQUOT_DROP(inode); + inode->i_flags |= S_NOQUOTA; + inode->i_nlink = 0; + iput(inode); + return ERR_PTR(-EDQUOT); + } + + UFSD(("allocating inode %lu\n", inode->i_ino)) + UFSD(("EXIT\n")) + return inode; + +failed: + unlock_super (sb); + make_bad_inode(inode); + iput (inode); + UFSD(("EXIT (FAILED)\n")) + return ERR_PTR(-ENOSPC); +} diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c new file mode 100644 index 0000000..718627c --- /dev/null +++ b/fs/ufs/inode.c @@ -0,0 +1,816 @@ +/* + * linux/fs/ufs/inode.c + * + * Copyright (C) 1998 + * Daniel Pirkl <daniel.pirkl@email.cz> + * Charles University, Faculty of Mathematics and Physics + * + * from + * + * linux/fs/ext2/inode.c + * + * Copyright (C) 1992, 1993, 1994, 1995 + * Remy Card (card@masi.ibp.fr) + * Laboratoire MASI - Institut Blaise Pascal + * Universite Pierre et Marie Curie (Paris VI) + * + * from + * + * linux/fs/minix/inode.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993 + * Big-endian to little-endian byte-swapping/bitmaps by + * David S. Miller (davem@caip.rutgers.edu), 1995 + */ + +#include <asm/uaccess.h> +#include <asm/system.h> + +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/ufs_fs.h> +#include <linux/time.h> +#include <linux/stat.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/smp_lock.h> +#include <linux/buffer_head.h> + +#include "swab.h" +#include "util.h" + +#undef UFS_INODE_DEBUG +#undef UFS_INODE_DEBUG_MORE + +#ifdef UFS_INODE_DEBUG +#define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x; +#else +#define UFSD(x) +#endif + +static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4]) +{ + struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; + int ptrs = uspi->s_apb; + int ptrs_bits = uspi->s_apbshift; + const long direct_blocks = UFS_NDADDR, + indirect_blocks = ptrs, + double_blocks = (1 << (ptrs_bits * 2)); + int n = 0; + + + UFSD(("ptrs=uspi->s_apb = %d,double_blocks=%d \n",ptrs,double_blocks)); + if (i_block < 0) { + ufs_warning(inode->i_sb, "ufs_block_to_path", "block < 0"); + } else if (i_block < direct_blocks) { + offsets[n++] = i_block; + } else if ((i_block -= direct_blocks) < indirect_blocks) { + offsets[n++] = UFS_IND_BLOCK; + offsets[n++] = i_block; + } else if ((i_block -= indirect_blocks) < double_blocks) { + offsets[n++] = UFS_DIND_BLOCK; + offsets[n++] = i_block >> ptrs_bits; + offsets[n++] = i_block & (ptrs - 1); + } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { + offsets[n++] = UFS_TIND_BLOCK; + offsets[n++] = i_block >> (ptrs_bits * 2); + offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); + offsets[n++] = i_block & (ptrs - 1); + } else { + ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big"); + } + return n; +} + +/* + * Returns the location of the fragment from + * the begining of the filesystem. + */ + +u64 ufs_frag_map(struct inode *inode, sector_t frag) +{ + struct ufs_inode_info *ufsi = UFS_I(inode); + struct super_block *sb = inode->i_sb; + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; + int shift = uspi->s_apbshift-uspi->s_fpbshift; + sector_t offsets[4], *p; + int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets); + u64 ret = 0L; + __fs32 block; + __fs64 u2_block = 0L; + unsigned flags = UFS_SB(sb)->s_flags; + u64 temp = 0L; + + UFSD((": frag = %lu depth = %d\n",frag,depth)); + UFSD((": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",uspi->s_fpbshift,uspi->s_apbmask,mask)); + + if (depth == 0) + return 0; + + p = offsets; + + lock_kernel(); + if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) + goto ufs2; + + block = ufsi->i_u1.i_data[*p++]; + if (!block) + goto out; + while (--depth) { + struct buffer_head *bh; + sector_t n = *p++; + + bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift)); + if (!bh) + goto out; + block = ((__fs32 *) bh->b_data)[n & mask]; + brelse (bh); + if (!block) + goto out; + } + ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask)); + goto out; +ufs2: + u2_block = ufsi->i_u1.u2_i_data[*p++]; + if (!u2_block) + goto out; + + + while (--depth) { + struct buffer_head *bh; + sector_t n = *p++; + + + temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block); + bh = sb_bread(sb, temp +(u64) (n>>shift)); + if (!bh) + goto out; + u2_block = ((__fs64 *)bh->b_data)[n & mask]; + brelse(bh); + if (!u2_block) + goto out; + } + temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block); + ret = temp + (u64) (frag & uspi->s_fpbmask); + +out: + unlock_kernel(); + return ret; +} + +static struct buffer_head * ufs_inode_getfrag (struct inode *inode, + unsigned int fragment, unsigned int new_fragment, + unsigned int required, int *err, int metadata, long *phys, int *new) +{ + struct ufs_inode_info *ufsi = UFS_I(inode); + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct buffer_head * result; + unsigned block, blockoff, lastfrag, lastblock, lastblockoff; + unsigned tmp, goal; + __fs32 * p, * p2; + unsigned flags = 0; + + UFSD(("ENTER, ino %lu, fragment %u, new_fragment %u, required %u\n", + inode->i_ino, fragment, new_fragment, required)) + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + + flags = UFS_SB(sb)->s_flags; + /* TODO : to be done for write support + if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) + goto ufs2; + */ + + block = ufs_fragstoblks (fragment); + blockoff = ufs_fragnum (fragment); + p = ufsi->i_u1.i_data + block; + goal = 0; + +repeat: + tmp = fs32_to_cpu(sb, *p); + lastfrag = ufsi->i_lastfrag; + if (tmp && fragment < lastfrag) { + if (metadata) { + result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); + if (tmp == fs32_to_cpu(sb, *p)) { + UFSD(("EXIT, result %u\n", tmp + blockoff)) + return result; + } + brelse (result); + goto repeat; + } else { + *phys = tmp; + return NULL; + } + } + + lastblock = ufs_fragstoblks (lastfrag); + lastblockoff = ufs_fragnum (lastfrag); + /* + * We will extend file into new block beyond last allocated block + */ + if (lastblock < block) { + /* + * We must reallocate last allocated block + */ + if (lastblockoff) { + p2 = ufsi->i_u1.i_data + lastblock; + tmp = ufs_new_fragments (inode, p2, lastfrag, + fs32_to_cpu(sb, *p2), uspi->s_fpb - lastblockoff, err); + if (!tmp) { + if (lastfrag != ufsi->i_lastfrag) + goto repeat; + else + return NULL; + } + lastfrag = ufsi->i_lastfrag; + + } + goal = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock]) + uspi->s_fpb; + tmp = ufs_new_fragments (inode, p, fragment - blockoff, + goal, required + blockoff, err); + } + /* + * We will extend last allocated block + */ + else if (lastblock == block) { + tmp = ufs_new_fragments (inode, p, fragment - (blockoff - lastblockoff), + fs32_to_cpu(sb, *p), required + (blockoff - lastblockoff), err); + } + /* + * We will allocate new block before last allocated block + */ + else /* (lastblock > block) */ { + if (lastblock && (tmp = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock-1]))) + goal = tmp + uspi->s_fpb; + tmp = ufs_new_fragments (inode, p, fragment - blockoff, + goal, uspi->s_fpb, err); + } + if (!tmp) { + if ((!blockoff && *p) || + (blockoff && lastfrag != ufsi->i_lastfrag)) + goto repeat; + *err = -ENOSPC; + return NULL; + } + + /* The nullification of framgents done in ufs/balloc.c is + * something I don't have the stomache to move into here right + * now. -DaveM + */ + if (metadata) { + result = sb_getblk(inode->i_sb, tmp + blockoff); + } else { + *phys = tmp; + result = NULL; + *err = 0; + *new = 1; + } + + inode->i_ctime = CURRENT_TIME_SEC; + if (IS_SYNC(inode)) + ufs_sync_inode (inode); + mark_inode_dirty(inode); + UFSD(("EXIT, result %u\n", tmp + blockoff)) + return result; + + /* This part : To be implemented .... + Required only for writing, not required for READ-ONLY. +ufs2: + + u2_block = ufs_fragstoblks(fragment); + u2_blockoff = ufs_fragnum(fragment); + p = ufsi->i_u1.u2_i_data + block; + goal = 0; + +repeat2: + tmp = fs32_to_cpu(sb, *p); + lastfrag = ufsi->i_lastfrag; + + */ +} + +static struct buffer_head * ufs_block_getfrag (struct inode *inode, + struct buffer_head *bh, unsigned int fragment, unsigned int new_fragment, + unsigned int blocksize, int * err, int metadata, long *phys, int *new) +{ + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct buffer_head * result; + unsigned tmp, goal, block, blockoff; + __fs32 * p; + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + block = ufs_fragstoblks (fragment); + blockoff = ufs_fragnum (fragment); + + UFSD(("ENTER, ino %lu, fragment %u, new_fragment %u\n", inode->i_ino, fragment, new_fragment)) + + result = NULL; + if (!bh) + goto out; + if (!buffer_uptodate(bh)) { + ll_rw_block (READ, 1, &bh); + wait_on_buffer (bh); + if (!buffer_uptodate(bh)) + goto out; + } + + p = (__fs32 *) bh->b_data + block; +repeat: + tmp = fs32_to_cpu(sb, *p); + if (tmp) { + if (metadata) { + result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); + if (tmp == fs32_to_cpu(sb, *p)) + goto out; + brelse (result); + goto repeat; + } else { + *phys = tmp; + goto out; + } + } + + if (block && (tmp = fs32_to_cpu(sb, ((__fs32*)bh->b_data)[block-1]) + uspi->s_fpb)) + goal = tmp + uspi->s_fpb; + else + goal = bh->b_blocknr + uspi->s_fpb; + tmp = ufs_new_fragments (inode, p, ufs_blknum(new_fragment), goal, uspi->s_fpb, err); + if (!tmp) { + if (fs32_to_cpu(sb, *p)) + goto repeat; + goto out; + } + + /* The nullification of framgents done in ufs/balloc.c is + * something I don't have the stomache to move into here right + * now. -DaveM + */ + if (metadata) { + result = sb_getblk(sb, tmp + blockoff); + } else { + *phys = tmp; + *new = 1; + } + + mark_buffer_dirty(bh); + if (IS_SYNC(inode)) + sync_dirty_buffer(bh); + inode->i_ctime = CURRENT_TIME_SEC; + mark_inode_dirty(inode); +out: + brelse (bh); + UFSD(("EXIT, result %u\n", tmp + blockoff)) + return result; +} + +/* + * This function gets the block which contains the fragment. + */ + +static int ufs_getfrag_block (struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) +{ + struct super_block * sb = inode->i_sb; + struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi; + struct buffer_head * bh; + int ret, err, new; + unsigned long ptr,phys; + u64 phys64 = 0; + + if (!create) { + phys64 = ufs_frag_map(inode, fragment); + UFSD(("phys64 = %lu \n",phys64)); + if (phys64) + map_bh(bh_result, sb, phys64); + return 0; + } + + /* This code entered only while writing ....? */ + + err = -EIO; + new = 0; + ret = 0; + bh = NULL; + + lock_kernel(); + + UFSD(("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment)) + if (fragment < 0) + goto abort_negative; + if (fragment > + ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) + << uspi->s_fpbshift)) + goto abort_too_big; + + err = 0; + ptr = fragment; + + /* + * ok, these macros clean the logic up a bit and make + * it much more readable: + */ +#define GET_INODE_DATABLOCK(x) \ + ufs_inode_getfrag(inode, x, fragment, 1, &err, 0, &phys, &new) +#define GET_INODE_PTR(x) \ + ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, 1, NULL, NULL) +#define GET_INDIRECT_DATABLOCK(x) \ + ufs_block_getfrag(inode, bh, x, fragment, sb->s_blocksize, \ + &err, 0, &phys, &new); +#define GET_INDIRECT_PTR(x) \ + ufs_block_getfrag(inode, bh, x, fragment, sb->s_blocksize, \ + &err, 1, NULL, NULL); + + if (ptr < UFS_NDIR_FRAGMENT) { + bh = GET_INODE_DATABLOCK(ptr); + goto out; + } + ptr -= UFS_NDIR_FRAGMENT; + if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) { + bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift)); + goto get_indirect; + } + ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); + if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) { + bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift)); + goto get_double; + } + ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); + bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift)); + bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask); +get_double: + bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask); +get_indirect: + bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask); + +#undef GET_INODE_DATABLOCK +#undef GET_INODE_PTR +#undef GET_INDIRECT_DATABLOCK +#undef GET_INDIRECT_PTR + +out: + if (err) + goto abort; + if (new) + set_buffer_new(bh_result); + map_bh(bh_result, sb, phys); +abort: + unlock_kernel(); + return err; + +abort_negative: + ufs_warning(sb, "ufs_get_block", "block < 0"); + goto abort; + +abort_too_big: + ufs_warning(sb, "ufs_get_block", "block > big"); + goto abort; +} + +struct buffer_head *ufs_getfrag(struct inode *inode, unsigned int fragment, + int create, int *err) +{ + struct buffer_head dummy; + int error; + + dummy.b_state = 0; + dummy.b_blocknr = -1000; + error = ufs_getfrag_block(inode, fragment, &dummy, create); + *err = error; + if (!error && buffer_mapped(&dummy)) { + struct buffer_head *bh; + bh = sb_getblk(inode->i_sb, dummy.b_blocknr); + if (buffer_new(&dummy)) { + memset(bh->b_data, 0, inode->i_sb->s_blocksize); + set_buffer_uptodate(bh); + mark_buffer_dirty(bh); + } + return bh; + } + return NULL; +} + +struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment, + int create, int * err) +{ + struct buffer_head * bh; + + UFSD(("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment)) + bh = ufs_getfrag (inode, fragment, create, err); + if (!bh || buffer_uptodate(bh)) + return bh; + ll_rw_block (READ, 1, &bh); + wait_on_buffer (bh); + if (buffer_uptodate(bh)) + return bh; + brelse (bh); + *err = -EIO; + return NULL; +} + +static int ufs_writepage(struct page *page, struct writeback_control *wbc) +{ + return block_write_full_page(page,ufs_getfrag_block,wbc); +} +static int ufs_readpage(struct file *file, struct page *page) +{ + return block_read_full_page(page,ufs_getfrag_block); +} +static int ufs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to) +{ + return block_prepare_write(page,from,to,ufs_getfrag_block); +} +static sector_t ufs_bmap(struct address_space *mapping, sector_t block) +{ + return generic_block_bmap(mapping,block,ufs_getfrag_block); +} +struct address_space_operations ufs_aops = { + .readpage = ufs_readpage, + .writepage = ufs_writepage, + .sync_page = block_sync_page, + .prepare_write = ufs_prepare_write, + .commit_write = generic_commit_write, + .bmap = ufs_bmap +}; + +void ufs_read_inode (struct inode * inode) +{ + struct ufs_inode_info *ufsi = UFS_I(inode); + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct ufs_inode * ufs_inode; + struct ufs2_inode *ufs2_inode; + struct buffer_head * bh; + mode_t mode; + unsigned i; + unsigned flags; + + UFSD(("ENTER, ino %lu\n", inode->i_ino)) + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + flags = UFS_SB(sb)->s_flags; + + if (inode->i_ino < UFS_ROOTINO || + inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { + ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); + goto bad_inode; + } + + bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); + if (!bh) { + ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); + goto bad_inode; + } + if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) + goto ufs2_inode; + + ufs_inode = (struct ufs_inode *) (bh->b_data + sizeof(struct ufs_inode) * ufs_inotofsbo(inode->i_ino)); + + /* + * Copy data to the in-core inode. + */ + inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); + inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink); + if (inode->i_nlink == 0) + ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); + + /* + * Linux now has 32-bit uid and gid, so we can support EFT. + */ + inode->i_uid = ufs_get_inode_uid(sb, ufs_inode); + inode->i_gid = ufs_get_inode_gid(sb, ufs_inode); + + inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); + inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); + inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); + inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); + inode->i_mtime.tv_nsec = 0; + inode->i_atime.tv_nsec = 0; + inode->i_ctime.tv_nsec = 0; + inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); + inode->i_blksize = PAGE_SIZE; /* This is the optimal IO size (for stat) */ + inode->i_version++; + ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); + ufsi->i_gen = fs32_to_cpu(sb, ufs_inode->ui_gen); + ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); + ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); + ufsi->i_lastfrag = (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; + + if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { + for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) + ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i]; + } + else { + for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) + ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i]; + } + ufsi->i_osync = 0; + + if (S_ISREG(inode->i_mode)) { + inode->i_op = &ufs_file_inode_operations; + inode->i_fop = &ufs_file_operations; + inode->i_mapping->a_ops = &ufs_aops; + } else if (S_ISDIR(inode->i_mode)) { + inode->i_op = &ufs_dir_inode_operations; + inode->i_fop = &ufs_dir_operations; + } else if (S_ISLNK(inode->i_mode)) { + if (!inode->i_blocks) + inode->i_op = &ufs_fast_symlink_inode_operations; + else { + inode->i_op = &page_symlink_inode_operations; + inode->i_mapping->a_ops = &ufs_aops; + } + } else + init_special_inode(inode, inode->i_mode, + ufs_get_inode_dev(sb, ufsi)); + + brelse (bh); + + UFSD(("EXIT\n")) + return; + +bad_inode: + make_bad_inode(inode); + return; + +ufs2_inode : + UFSD(("Reading ufs2 inode, ino %lu\n", inode->i_ino)) + + ufs2_inode = (struct ufs2_inode *)(bh->b_data + sizeof(struct ufs2_inode) * ufs_inotofsbo(inode->i_ino)); + + /* + * Copy data to the in-core inode. + */ + inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); + inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink); + if (inode->i_nlink == 0) + ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); + + /* + * Linux now has 32-bit uid and gid, so we can support EFT. + */ + inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid); + inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid); + + inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); + inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_atime.tv_sec); + inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_ctime.tv_sec); + inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_mtime.tv_sec); + inode->i_mtime.tv_nsec = 0; + inode->i_atime.tv_nsec = 0; + inode->i_ctime.tv_nsec = 0; + inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); + inode->i_blksize = PAGE_SIZE; /*This is the optimal IO size(for stat)*/ + + inode->i_version++; + ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); + ufsi->i_gen = fs32_to_cpu(sb, ufs2_inode->ui_gen); + /* + ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); + ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); + */ + ufsi->i_lastfrag= (inode->i_size + uspi->s_fsize- 1) >> uspi->s_fshift; + + if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { + for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) + ufsi->i_u1.u2_i_data[i] = + ufs2_inode->ui_u2.ui_addr.ui_db[i]; + } + else { + for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) + ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i]; + } + ufsi->i_osync = 0; + + if (S_ISREG(inode->i_mode)) { + inode->i_op = &ufs_file_inode_operations; + inode->i_fop = &ufs_file_operations; + inode->i_mapping->a_ops = &ufs_aops; + } else if (S_ISDIR(inode->i_mode)) { + inode->i_op = &ufs_dir_inode_operations; + inode->i_fop = &ufs_dir_operations; + } else if (S_ISLNK(inode->i_mode)) { + if (!inode->i_blocks) + inode->i_op = &ufs_fast_symlink_inode_operations; + else { + inode->i_op = &page_symlink_inode_operations; + inode->i_mapping->a_ops = &ufs_aops; + } + } else /* TODO : here ...*/ + init_special_inode(inode, inode->i_mode, + ufs_get_inode_dev(sb, ufsi)); + + brelse(bh); + + UFSD(("EXIT\n")) + return; +} + +static int ufs_update_inode(struct inode * inode, int do_sync) +{ + struct ufs_inode_info *ufsi = UFS_I(inode); + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct buffer_head * bh; + struct ufs_inode * ufs_inode; + unsigned i; + unsigned flags; + + UFSD(("ENTER, ino %lu\n", inode->i_ino)) + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + flags = UFS_SB(sb)->s_flags; + + if (inode->i_ino < UFS_ROOTINO || + inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { + ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); + return -1; + } + + bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); + if (!bh) { + ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); + return -1; + } + ufs_inode = (struct ufs_inode *) (bh->b_data + ufs_inotofsbo(inode->i_ino) * sizeof(struct ufs_inode)); + + ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); + ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); + + ufs_set_inode_uid(sb, ufs_inode, inode->i_uid); + ufs_set_inode_gid(sb, ufs_inode, inode->i_gid); + + ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); + ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); + ufs_inode->ui_atime.tv_usec = 0; + ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); + ufs_inode->ui_ctime.tv_usec = 0; + ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); + ufs_inode->ui_mtime.tv_usec = 0; + ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); + ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); + ufs_inode->ui_gen = cpu_to_fs32(sb, ufsi->i_gen); + + if ((flags & UFS_UID_MASK) == UFS_UID_EFT) { + ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); + ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); + } + + if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { + /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ + ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; + } else if (inode->i_blocks) { + for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) + ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.i_data[i]; + } + else { + for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) + ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i]; + } + + if (!inode->i_nlink) + memset (ufs_inode, 0, sizeof(struct ufs_inode)); + + mark_buffer_dirty(bh); + if (do_sync) + sync_dirty_buffer(bh); + brelse (bh); + + UFSD(("EXIT\n")) + return 0; +} + +int ufs_write_inode (struct inode * inode, int wait) +{ + int ret; + lock_kernel(); + ret = ufs_update_inode (inode, wait); + unlock_kernel(); + return ret; +} + +int ufs_sync_inode (struct inode *inode) +{ + return ufs_update_inode (inode, 1); +} + +void ufs_delete_inode (struct inode * inode) +{ + /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/ + lock_kernel(); + mark_inode_dirty(inode); + ufs_update_inode(inode, IS_SYNC(inode)); + inode->i_size = 0; + if (inode->i_blocks) + ufs_truncate (inode); + ufs_free_inode (inode); + unlock_kernel(); +} diff --git a/fs/ufs/namei.c b/fs/ufs/namei.c new file mode 100644 index 0000000..2958cde --- /dev/null +++ b/fs/ufs/namei.c @@ -0,0 +1,375 @@ +/* + * linux/fs/ufs/namei.c + * + * Copyright (C) 1998 + * Daniel Pirkl <daniel.pirkl@email.cz> + * Charles University, Faculty of Mathematics and Physics + * + * from + * + * linux/fs/ext2/namei.c + * + * Copyright (C) 1992, 1993, 1994, 1995 + * Remy Card (card@masi.ibp.fr) + * Laboratoire MASI - Institut Blaise Pascal + * Universite Pierre et Marie Curie (Paris VI) + * + * from + * + * linux/fs/minix/namei.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * Big-endian to little-endian byte-swapping/bitmaps by + * David S. Miller (davem@caip.rutgers.edu), 1995 + */ + +#include <linux/time.h> +#include <linux/fs.h> +#include <linux/ufs_fs.h> +#include <linux/smp_lock.h> +#include <linux/buffer_head.h> +#include "swab.h" /* will go away - see comment in mknod() */ +#include "util.h" + +/* +#undef UFS_NAMEI_DEBUG +*/ +#define UFS_NAMEI_DEBUG + +#ifdef UFS_NAMEI_DEBUG +#define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x; +#else +#define UFSD(x) +#endif + +static inline void ufs_inc_count(struct inode *inode) +{ + inode->i_nlink++; + mark_inode_dirty(inode); +} + +static inline void ufs_dec_count(struct inode *inode) +{ + inode->i_nlink--; + mark_inode_dirty(inode); +} + +static inline int ufs_add_nondir(struct dentry *dentry, struct inode *inode) +{ + int err = ufs_add_link(dentry, inode); + if (!err) { + d_instantiate(dentry, inode); + return 0; + } + ufs_dec_count(inode); + iput(inode); + return err; +} + +static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd) +{ + struct inode * inode = NULL; + ino_t ino; + + if (dentry->d_name.len > UFS_MAXNAMLEN) + return ERR_PTR(-ENAMETOOLONG); + + lock_kernel(); + ino = ufs_inode_by_name(dir, dentry); + if (ino) { + inode = iget(dir->i_sb, ino); + if (!inode) { + unlock_kernel(); + return ERR_PTR(-EACCES); + } + } + unlock_kernel(); + d_add(dentry, inode); + return NULL; +} + +/* + * By the time this is called, we already have created + * the directory cache entry for the new file, but it + * is so far negative - it has no inode. + * + * If the create succeeds, we fill in the inode information + * with d_instantiate(). + */ +static int ufs_create (struct inode * dir, struct dentry * dentry, int mode, + struct nameidata *nd) +{ + struct inode * inode = ufs_new_inode(dir, mode); + int err = PTR_ERR(inode); + if (!IS_ERR(inode)) { + inode->i_op = &ufs_file_inode_operations; + inode->i_fop = &ufs_file_operations; + inode->i_mapping->a_ops = &ufs_aops; + mark_inode_dirty(inode); + lock_kernel(); + err = ufs_add_nondir(dentry, inode); + unlock_kernel(); + } + return err; +} + +static int ufs_mknod (struct inode * dir, struct dentry *dentry, int mode, dev_t rdev) +{ + struct inode *inode; + int err; + + if (!old_valid_dev(rdev)) + return -EINVAL; + inode = ufs_new_inode(dir, mode); + err = PTR_ERR(inode); + if (!IS_ERR(inode)) { + init_special_inode(inode, mode, rdev); + /* NOTE: that'll go when we get wide dev_t */ + ufs_set_inode_dev(inode->i_sb, UFS_I(inode), rdev); + mark_inode_dirty(inode); + lock_kernel(); + err = ufs_add_nondir(dentry, inode); + unlock_kernel(); + } + return err; +} + +static int ufs_symlink (struct inode * dir, struct dentry * dentry, + const char * symname) +{ + struct super_block * sb = dir->i_sb; + int err = -ENAMETOOLONG; + unsigned l = strlen(symname)+1; + struct inode * inode; + + if (l > sb->s_blocksize) + goto out; + + lock_kernel(); + inode = ufs_new_inode(dir, S_IFLNK | S_IRWXUGO); + err = PTR_ERR(inode); + if (IS_ERR(inode)) + goto out; + + if (l > UFS_SB(sb)->s_uspi->s_maxsymlinklen) { + /* slow symlink */ + inode->i_op = &page_symlink_inode_operations; + inode->i_mapping->a_ops = &ufs_aops; + err = page_symlink(inode, symname, l); + if (err) + goto out_fail; + } else { + /* fast symlink */ + inode->i_op = &ufs_fast_symlink_inode_operations; + memcpy((char*)&UFS_I(inode)->i_u1.i_data,symname,l); + inode->i_size = l-1; + } + mark_inode_dirty(inode); + + err = ufs_add_nondir(dentry, inode); +out: + unlock_kernel(); + return err; + +out_fail: + ufs_dec_count(inode); + iput(inode); + goto out; +} + +static int ufs_link (struct dentry * old_dentry, struct inode * dir, + struct dentry *dentry) +{ + struct inode *inode = old_dentry->d_inode; + int error; + + lock_kernel(); + if (inode->i_nlink >= UFS_LINK_MAX) { + unlock_kernel(); + return -EMLINK; + } + + inode->i_ctime = CURRENT_TIME_SEC; + ufs_inc_count(inode); + atomic_inc(&inode->i_count); + + error = ufs_add_nondir(dentry, inode); + unlock_kernel(); + return error; +} + +static int ufs_mkdir(struct inode * dir, struct dentry * dentry, int mode) +{ + struct inode * inode; + int err = -EMLINK; + + if (dir->i_nlink >= UFS_LINK_MAX) + goto out; + + lock_kernel(); + ufs_inc_count(dir); + + inode = ufs_new_inode(dir, S_IFDIR|mode); + err = PTR_ERR(inode); + if (IS_ERR(inode)) + goto out_dir; + + inode->i_op = &ufs_dir_inode_operations; + inode->i_fop = &ufs_dir_operations; + + ufs_inc_count(inode); + + err = ufs_make_empty(inode, dir); + if (err) + goto out_fail; + + err = ufs_add_link(dentry, inode); + if (err) + goto out_fail; + unlock_kernel(); + + d_instantiate(dentry, inode); +out: + return err; + +out_fail: + ufs_dec_count(inode); + ufs_dec_count(inode); + iput (inode); +out_dir: + ufs_dec_count(dir); + unlock_kernel(); + goto out; +} + +static int ufs_unlink(struct inode * dir, struct dentry *dentry) +{ + struct inode * inode = dentry->d_inode; + struct buffer_head * bh; + struct ufs_dir_entry * de; + int err = -ENOENT; + + lock_kernel(); + de = ufs_find_entry (dentry, &bh); + if (!de) + goto out; + + err = ufs_delete_entry (dir, de, bh); + if (err) + goto out; + + inode->i_ctime = dir->i_ctime; + ufs_dec_count(inode); + err = 0; +out: + unlock_kernel(); + return err; +} + +static int ufs_rmdir (struct inode * dir, struct dentry *dentry) +{ + struct inode * inode = dentry->d_inode; + int err= -ENOTEMPTY; + + lock_kernel(); + if (ufs_empty_dir (inode)) { + err = ufs_unlink(dir, dentry); + if (!err) { + inode->i_size = 0; + ufs_dec_count(inode); + ufs_dec_count(dir); + } + } + unlock_kernel(); + return err; +} + +static int ufs_rename (struct inode * old_dir, struct dentry * old_dentry, + struct inode * new_dir, struct dentry * new_dentry ) +{ + struct inode *old_inode = old_dentry->d_inode; + struct inode *new_inode = new_dentry->d_inode; + struct buffer_head *dir_bh = NULL; + struct ufs_dir_entry *dir_de = NULL; + struct buffer_head *old_bh; + struct ufs_dir_entry *old_de; + int err = -ENOENT; + + lock_kernel(); + old_de = ufs_find_entry (old_dentry, &old_bh); + if (!old_de) + goto out; + + if (S_ISDIR(old_inode->i_mode)) { + err = -EIO; + dir_de = ufs_dotdot(old_inode, &dir_bh); + if (!dir_de) + goto out_old; + } + + if (new_inode) { + struct buffer_head *new_bh; + struct ufs_dir_entry *new_de; + + err = -ENOTEMPTY; + if (dir_de && !ufs_empty_dir (new_inode)) + goto out_dir; + err = -ENOENT; + new_de = ufs_find_entry (new_dentry, &new_bh); + if (!new_de) + goto out_dir; + ufs_inc_count(old_inode); + ufs_set_link(new_dir, new_de, new_bh, old_inode); + new_inode->i_ctime = CURRENT_TIME_SEC; + if (dir_de) + new_inode->i_nlink--; + ufs_dec_count(new_inode); + } else { + if (dir_de) { + err = -EMLINK; + if (new_dir->i_nlink >= UFS_LINK_MAX) + goto out_dir; + } + ufs_inc_count(old_inode); + err = ufs_add_link(new_dentry, old_inode); + if (err) { + ufs_dec_count(old_inode); + goto out_dir; + } + if (dir_de) + ufs_inc_count(new_dir); + } + + ufs_delete_entry (old_dir, old_de, old_bh); + + ufs_dec_count(old_inode); + + if (dir_de) { + ufs_set_link(old_inode, dir_de, dir_bh, new_dir); + ufs_dec_count(old_dir); + } + unlock_kernel(); + return 0; + +out_dir: + if (dir_de) + brelse(dir_bh); +out_old: + brelse (old_bh); +out: + unlock_kernel(); + return err; +} + +struct inode_operations ufs_dir_inode_operations = { + .create = ufs_create, + .lookup = ufs_lookup, + .link = ufs_link, + .unlink = ufs_unlink, + .symlink = ufs_symlink, + .mkdir = ufs_mkdir, + .rmdir = ufs_rmdir, + .mknod = ufs_mknod, + .rename = ufs_rename, +}; diff --git a/fs/ufs/super.c b/fs/ufs/super.c new file mode 100644 index 0000000..f036d69 --- /dev/null +++ b/fs/ufs/super.c @@ -0,0 +1,1347 @@ +/* + * linux/fs/ufs/super.c + * + * Copyright (C) 1998 + * Daniel Pirkl <daniel.pirkl@email.cz> + * Charles University, Faculty of Mathematics and Physics + */ + +/* Derived from + * + * linux/fs/ext2/super.c + * + * Copyright (C) 1992, 1993, 1994, 1995 + * Remy Card (card@masi.ibp.fr) + * Laboratoire MASI - Institut Blaise Pascal + * Universite Pierre et Marie Curie (Paris VI) + * + * from + * + * linux/fs/minix/inode.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * Big-endian to little-endian byte-swapping/bitmaps by + * David S. Miller (davem@caip.rutgers.edu), 1995 + */ + +/* + * Inspired by + * + * linux/fs/ufs/super.c + * + * Copyright (C) 1996 + * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu) + * Laboratory for Computer Science Research Computing Facility + * Rutgers, The State University of New Jersey + * + * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be) + * + * Kernel module support added on 96/04/26 by + * Stefan Reinauer <stepan@home.culture.mipt.ru> + * + * Module usage counts added on 96/04/29 by + * Gertjan van Wingerde <gertjan@cs.vu.nl> + * + * Clean swab support on 19970406 by + * Francois-Rene Rideau <fare@tunes.org> + * + * 4.4BSD (FreeBSD) support added on February 1st 1998 by + * Niels Kristian Bech Jensen <nkbj@image.dk> partially based + * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>. + * + * NeXTstep support added on February 5th 1998 by + * Niels Kristian Bech Jensen <nkbj@image.dk>. + * + * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998 + * + * HP/UX hfs filesystem support added by + * Martin K. Petersen <mkp@mkp.net>, August 1999 + * + * UFS2 (of FreeBSD 5.x) support added by + * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004 + * + */ + + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/bitops.h> + +#include <stdarg.h> + +#include <asm/uaccess.h> +#include <asm/system.h> + +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/ufs_fs.h> +#include <linux/slab.h> +#include <linux/time.h> +#include <linux/stat.h> +#include <linux/string.h> +#include <linux/blkdev.h> +#include <linux/init.h> +#include <linux/parser.h> +#include <linux/smp_lock.h> +#include <linux/buffer_head.h> +#include <linux/vfs.h> + +#include "swab.h" +#include "util.h" + +#undef UFS_SUPER_DEBUG +#undef UFS_SUPER_DEBUG_MORE + + +#undef UFS_SUPER_DEBUG_MORE +#ifdef UFS_SUPER_DEBUG +#define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x; +#else +#define UFSD(x) +#endif + +#ifdef UFS_SUPER_DEBUG_MORE +/* + * Print contents of ufs_super_block, useful for debugging + */ +void ufs_print_super_stuff(struct super_block *sb, + struct ufs_super_block_first * usb1, + struct ufs_super_block_second * usb2, + struct ufs_super_block_third * usb3) +{ + printk("ufs_print_super_stuff\n"); + printk("size of usb: %u\n", sizeof(struct ufs_super_block)); + printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb3->fs_magic)); + printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); + printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); + printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); + printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); + printk(" cgoffset: %u\n", fs32_to_cpu(sb, usb1->fs_cgoffset)); + printk(" ~cgmask: 0x%x\n", ~fs32_to_cpu(sb, usb1->fs_cgmask)); + printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); + printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); + printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); + printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); + printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); + printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); + printk(" fragshift: %u\n", fs32_to_cpu(sb, usb1->fs_fragshift)); + printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); + printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); + printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); + printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); + printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); + printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); + printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); + printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); + printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); + printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); + printk(" fstodb: %u\n", fs32_to_cpu(sb, usb1->fs_fsbtodb)); + printk(" contigsumsize: %d\n", fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize)); + printk(" postblformat: %u\n", fs32_to_cpu(sb, usb3->fs_postblformat)); + printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); + printk(" ndir %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); + printk(" nifree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); + printk(" nbfree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); + printk(" nffree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); + printk("\n"); +} + +/* + * Print contents of ufs2 ufs_super_block, useful for debugging + */ +void ufs2_print_super_stuff( + struct super_block *sb, + struct ufs_super_block *usb) +{ + printk("ufs_print_super_stuff\n"); + printk("size of usb: %u\n", sizeof(struct ufs_super_block)); + printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb->fs_magic)); + printk(" fs_size: %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size)); + printk(" fs_dsize: %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize)); + printk(" bsize: %u\n", fs32_to_cpu(usb, usb->fs_bsize)); + printk(" fsize: %u\n", fs32_to_cpu(usb, usb->fs_fsize)); + printk(" fs_volname: %s\n", usb->fs_u11.fs_u2.fs_volname); + printk(" fs_fsmnt: %s\n", usb->fs_u11.fs_u2.fs_fsmnt); + printk(" fs_sblockloc: %u\n",fs64_to_cpu(sb, + usb->fs_u11.fs_u2.fs_sblockloc)); + printk(" cs_ndir(No of dirs): %u\n",fs64_to_cpu(sb, + usb->fs_u11.fs_u2.fs_cstotal.cs_ndir)); + printk(" cs_nbfree(No of free blocks): %u\n",fs64_to_cpu(sb, + usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)); + printk("\n"); +} + +/* + * Print contents of ufs_cylinder_group, useful for debugging + */ +void ufs_print_cylinder_stuff(struct super_block *sb, struct ufs_cylinder_group *cg) +{ + printk("\nufs_print_cylinder_stuff\n"); + printk("size of ucg: %u\n", sizeof(struct ufs_cylinder_group)); + printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); + printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); + printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); + printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); + printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); + printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); + printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); + printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); + printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); + printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); + printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); + printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); + printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); + printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", + fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), + fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), + fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), + fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); + printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); + printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); + printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); + printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); + printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); + printk(" clustersumoff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); + printk(" clusteroff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); + printk(" nclusterblks %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); + printk("\n"); +} +#endif /* UFS_SUPER_DEBUG_MORE */ + +static struct super_operations ufs_super_ops; + +static char error_buf[1024]; + +void ufs_error (struct super_block * sb, const char * function, + const char * fmt, ...) +{ + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + va_list args; + + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first(USPI_UBH); + + if (!(sb->s_flags & MS_RDONLY)) { + usb1->fs_clean = UFS_FSBAD; + ubh_mark_buffer_dirty(USPI_UBH); + sb->s_dirt = 1; + sb->s_flags |= MS_RDONLY; + } + va_start (args, fmt); + vsprintf (error_buf, fmt, args); + va_end (args); + switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { + case UFS_MOUNT_ONERROR_PANIC: + panic ("UFS-fs panic (device %s): %s: %s\n", + sb->s_id, function, error_buf); + + case UFS_MOUNT_ONERROR_LOCK: + case UFS_MOUNT_ONERROR_UMOUNT: + case UFS_MOUNT_ONERROR_REPAIR: + printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", + sb->s_id, function, error_buf); + } +} + +void ufs_panic (struct super_block * sb, const char * function, + const char * fmt, ...) +{ + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + va_list args; + + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first(USPI_UBH); + + if (!(sb->s_flags & MS_RDONLY)) { + usb1->fs_clean = UFS_FSBAD; + ubh_mark_buffer_dirty(USPI_UBH); + sb->s_dirt = 1; + } + va_start (args, fmt); + vsprintf (error_buf, fmt, args); + va_end (args); + sb->s_flags |= MS_RDONLY; + printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", + sb->s_id, function, error_buf); +} + +void ufs_warning (struct super_block * sb, const char * function, + const char * fmt, ...) +{ + va_list args; + + va_start (args, fmt); + vsprintf (error_buf, fmt, args); + va_end (args); + printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", + sb->s_id, function, error_buf); +} + +enum { + Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd, + Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep, + Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock, + Opt_onerror_umount, Opt_onerror_repair, Opt_err +}; + +static match_table_t tokens = { + {Opt_type_old, "ufstype=old"}, + {Opt_type_sunx86, "ufstype=sunx86"}, + {Opt_type_sun, "ufstype=sun"}, + {Opt_type_44bsd, "ufstype=44bsd"}, + {Opt_type_ufs2, "ufstype=ufs2"}, + {Opt_type_ufs2, "ufstype=5xbsd"}, + {Opt_type_hp, "ufstype=hp"}, + {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, + {Opt_type_nextstep, "ufstype=nextstep"}, + {Opt_type_openstep, "ufstype=openstep"}, + {Opt_onerror_panic, "onerror=panic"}, + {Opt_onerror_lock, "onerror=lock"}, + {Opt_onerror_umount, "onerror=umount"}, + {Opt_onerror_repair, "onerror=repair"}, + {Opt_err, NULL} +}; + +static int ufs_parse_options (char * options, unsigned * mount_options) +{ + char * p; + + UFSD(("ENTER\n")) + + if (!options) + return 1; + + while ((p = strsep(&options, ",")) != NULL) { + substring_t args[MAX_OPT_ARGS]; + int token; + if (!*p) + continue; + + token = match_token(p, tokens, args); + switch (token) { + case Opt_type_old: + ufs_clear_opt (*mount_options, UFSTYPE); + ufs_set_opt (*mount_options, UFSTYPE_OLD); + break; + case Opt_type_sunx86: + ufs_clear_opt (*mount_options, UFSTYPE); + ufs_set_opt (*mount_options, UFSTYPE_SUNx86); + break; + case Opt_type_sun: + ufs_clear_opt (*mount_options, UFSTYPE); + ufs_set_opt (*mount_options, UFSTYPE_SUN); + break; + case Opt_type_44bsd: + ufs_clear_opt (*mount_options, UFSTYPE); + ufs_set_opt (*mount_options, UFSTYPE_44BSD); + break; + case Opt_type_ufs2: + ufs_clear_opt(*mount_options, UFSTYPE); + ufs_set_opt(*mount_options, UFSTYPE_UFS2); + break; + case Opt_type_hp: + ufs_clear_opt (*mount_options, UFSTYPE); + ufs_set_opt (*mount_options, UFSTYPE_HP); + break; + case Opt_type_nextstepcd: + ufs_clear_opt (*mount_options, UFSTYPE); + ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); + break; + case Opt_type_nextstep: + ufs_clear_opt (*mount_options, UFSTYPE); + ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); + break; + case Opt_type_openstep: + ufs_clear_opt (*mount_options, UFSTYPE); + ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); + break; + case Opt_onerror_panic: + ufs_clear_opt (*mount_options, ONERROR); + ufs_set_opt (*mount_options, ONERROR_PANIC); + break; + case Opt_onerror_lock: + ufs_clear_opt (*mount_options, ONERROR); + ufs_set_opt (*mount_options, ONERROR_LOCK); + break; + case Opt_onerror_umount: + ufs_clear_opt (*mount_options, ONERROR); + ufs_set_opt (*mount_options, ONERROR_UMOUNT); + break; + case Opt_onerror_repair: + printk("UFS-fs: Unable to do repair on error, " + "will lock lock instead\n"); + ufs_clear_opt (*mount_options, ONERROR); + ufs_set_opt (*mount_options, ONERROR_REPAIR); + break; + default: + printk("UFS-fs: Invalid option: \"%s\" " + "or missing value\n", p); + return 0; + } + } + return 1; +} + +/* + * Read on-disk structures associated with cylinder groups + */ +static int ufs_read_cylinder_structures (struct super_block *sb) { + struct ufs_sb_info * sbi = UFS_SB(sb); + struct ufs_sb_private_info * uspi; + struct ufs_super_block *usb; + struct ufs_buffer_head * ubh; + unsigned char * base, * space; + unsigned size, blks, i; + unsigned flags = 0; + + UFSD(("ENTER\n")) + + uspi = sbi->s_uspi; + + usb = (struct ufs_super_block *) + ((struct ufs_buffer_head *)uspi)->bh[0]->b_data; + + flags = UFS_SB(sb)->s_flags; + + /* + * Read cs structures from (usually) first data block + * on the device. + */ + size = uspi->s_cssize; + blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; + base = space = kmalloc(size, GFP_KERNEL); + if (!base) + goto failed; + for (i = 0; i < blks; i += uspi->s_fpb) { + size = uspi->s_bsize; + if (i + uspi->s_fpb > blks) + size = (blks - i) * uspi->s_fsize; + + if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { + ubh = ubh_bread(sb, + fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_csaddr) + i, size); + if (!ubh) + goto failed; + ubh_ubhcpymem (space, ubh, size); + sbi->s_csp[ufs_fragstoblks(i)]=(struct ufs_csum *)space; + } + else { + ubh = ubh_bread(sb, uspi->s_csaddr + i, size); + if (!ubh) + goto failed; + ubh_ubhcpymem(space, ubh, size); + sbi->s_csp[ufs_fragstoblks(i)]=(struct ufs_csum *)space; + } + space += size; + ubh_brelse (ubh); + ubh = NULL; + } + + /* + * Read cylinder group (we read only first fragment from block + * at this time) and prepare internal data structures for cg caching. + */ + if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL))) + goto failed; + for (i = 0; i < uspi->s_ncg; i++) + sbi->s_ucg[i] = NULL; + for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { + sbi->s_ucpi[i] = NULL; + sbi->s_cgno[i] = UFS_CGNO_EMPTY; + } + for (i = 0; i < uspi->s_ncg; i++) { + UFSD(("read cg %u\n", i)) + if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) + goto failed; + if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) + goto failed; +#ifdef UFS_SUPER_DEBUG_MORE + ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); +#endif + } + for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { + if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL))) + goto failed; + sbi->s_cgno[i] = UFS_CGNO_EMPTY; + } + sbi->s_cg_loaded = 0; + UFSD(("EXIT\n")) + return 1; + +failed: + if (base) kfree (base); + if (sbi->s_ucg) { + for (i = 0; i < uspi->s_ncg; i++) + if (sbi->s_ucg[i]) brelse (sbi->s_ucg[i]); + kfree (sbi->s_ucg); + for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) + if (sbi->s_ucpi[i]) kfree (sbi->s_ucpi[i]); + } + UFSD(("EXIT (FAILED)\n")) + return 0; +} + +/* + * Put on-disk structures associated with cylinder groups and + * write them back to disk + */ +static void ufs_put_cylinder_structures (struct super_block *sb) { + struct ufs_sb_info * sbi = UFS_SB(sb); + struct ufs_sb_private_info * uspi; + struct ufs_buffer_head * ubh; + unsigned char * base, * space; + unsigned blks, size, i; + + UFSD(("ENTER\n")) + + uspi = sbi->s_uspi; + + size = uspi->s_cssize; + blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; + base = space = (char*) sbi->s_csp[0]; + for (i = 0; i < blks; i += uspi->s_fpb) { + size = uspi->s_bsize; + if (i + uspi->s_fpb > blks) + size = (blks - i) * uspi->s_fsize; + ubh = ubh_bread(sb, uspi->s_csaddr + i, size); + ubh_memcpyubh (ubh, space, size); + space += size; + ubh_mark_buffer_uptodate (ubh, 1); + ubh_mark_buffer_dirty (ubh); + ubh_brelse (ubh); + } + for (i = 0; i < sbi->s_cg_loaded; i++) { + ufs_put_cylinder (sb, i); + kfree (sbi->s_ucpi[i]); + } + for (; i < UFS_MAX_GROUP_LOADED; i++) + kfree (sbi->s_ucpi[i]); + for (i = 0; i < uspi->s_ncg; i++) + brelse (sbi->s_ucg[i]); + kfree (sbi->s_ucg); + kfree (base); + UFSD(("EXIT\n")) +} + +static int ufs_fill_super(struct super_block *sb, void *data, int silent) +{ + struct ufs_sb_info * sbi; + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct ufs_super_block_second * usb2; + struct ufs_super_block_third * usb3; + struct ufs_super_block *usb; + struct ufs_buffer_head * ubh; + struct inode *inode; + unsigned block_size, super_block_size; + unsigned flags; + + uspi = NULL; + ubh = NULL; + flags = 0; + + UFSD(("ENTER\n")) + + sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); + if (!sbi) + goto failed_nomem; + sb->s_fs_info = sbi; + memset(sbi, 0, sizeof(struct ufs_sb_info)); + + UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY))) + +#ifndef CONFIG_UFS_FS_WRITE + if (!(sb->s_flags & MS_RDONLY)) { + printk("ufs was compiled with read-only support, " + "can't be mounted as read-write\n"); + goto failed; + } +#endif + /* + * Set default mount options + * Parse mount options + */ + sbi->s_mount_opt = 0; + ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); + if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { + printk("wrong mount options\n"); + goto failed; + } + if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { + if (!silent) + printk("You didn't specify the type of your ufs filesystem\n\n" + "mount -t ufs -o ufstype=" + "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|netxstep-cd|openstep ...\n\n" + ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " + "default is ufstype=old\n"); + ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); + } + + sbi->s_uspi = uspi = + kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL); + if (!uspi) + goto failed; + + /* Keep 2Gig file limit. Some UFS variants need to override + this but as I don't know which I'll let those in the know loosen + the rules */ + + switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { + case UFS_MOUNT_UFSTYPE_44BSD: + UFSD(("ufstype=44bsd\n")) + uspi->s_fsize = block_size = 512; + uspi->s_fmask = ~(512 - 1); + uspi->s_fshift = 9; + uspi->s_sbsize = super_block_size = 1536; + uspi->s_sbbase = 0; + flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; + break; + case UFS_MOUNT_UFSTYPE_UFS2: + UFSD(("ufstype=ufs2\n")) + uspi->s_fsize = block_size = 512; + uspi->s_fmask = ~(512 - 1); + uspi->s_fshift = 9; + uspi->s_sbsize = super_block_size = 1536; + uspi->s_sbbase = 0; + flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; + if (!(sb->s_flags & MS_RDONLY)) { + printk(KERN_INFO "ufstype=ufs2 is supported read-only\n"); + sb->s_flags |= MS_RDONLY; + } + break; + + case UFS_MOUNT_UFSTYPE_SUN: + UFSD(("ufstype=sun\n")) + uspi->s_fsize = block_size = 1024; + uspi->s_fmask = ~(1024 - 1); + uspi->s_fshift = 10; + uspi->s_sbsize = super_block_size = 2048; + uspi->s_sbbase = 0; + uspi->s_maxsymlinklen = 56; + flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; + break; + + case UFS_MOUNT_UFSTYPE_SUNx86: + UFSD(("ufstype=sunx86\n")) + uspi->s_fsize = block_size = 1024; + uspi->s_fmask = ~(1024 - 1); + uspi->s_fshift = 10; + uspi->s_sbsize = super_block_size = 2048; + uspi->s_sbbase = 0; + uspi->s_maxsymlinklen = 56; + flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; + break; + + case UFS_MOUNT_UFSTYPE_OLD: + UFSD(("ufstype=old\n")) + uspi->s_fsize = block_size = 1024; + uspi->s_fmask = ~(1024 - 1); + uspi->s_fshift = 10; + uspi->s_sbsize = super_block_size = 2048; + uspi->s_sbbase = 0; + flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; + if (!(sb->s_flags & MS_RDONLY)) { + if (!silent) + printk(KERN_INFO "ufstype=old is supported read-only\n"); + sb->s_flags |= MS_RDONLY; + } + break; + + case UFS_MOUNT_UFSTYPE_NEXTSTEP: + UFSD(("ufstype=nextstep\n")) + uspi->s_fsize = block_size = 1024; + uspi->s_fmask = ~(1024 - 1); + uspi->s_fshift = 10; + uspi->s_sbsize = super_block_size = 2048; + uspi->s_sbbase = 0; + flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; + if (!(sb->s_flags & MS_RDONLY)) { + if (!silent) + printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); + sb->s_flags |= MS_RDONLY; + } + break; + + case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: + UFSD(("ufstype=nextstep-cd\n")) + uspi->s_fsize = block_size = 2048; + uspi->s_fmask = ~(2048 - 1); + uspi->s_fshift = 11; + uspi->s_sbsize = super_block_size = 2048; + uspi->s_sbbase = 0; + flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; + if (!(sb->s_flags & MS_RDONLY)) { + if (!silent) + printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); + sb->s_flags |= MS_RDONLY; + } + break; + + case UFS_MOUNT_UFSTYPE_OPENSTEP: + UFSD(("ufstype=openstep\n")) + uspi->s_fsize = block_size = 1024; + uspi->s_fmask = ~(1024 - 1); + uspi->s_fshift = 10; + uspi->s_sbsize = super_block_size = 2048; + uspi->s_sbbase = 0; + flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; + if (!(sb->s_flags & MS_RDONLY)) { + if (!silent) + printk(KERN_INFO "ufstype=openstep is supported read-only\n"); + sb->s_flags |= MS_RDONLY; + } + break; + + case UFS_MOUNT_UFSTYPE_HP: + UFSD(("ufstype=hp\n")) + uspi->s_fsize = block_size = 1024; + uspi->s_fmask = ~(1024 - 1); + uspi->s_fshift = 10; + uspi->s_sbsize = super_block_size = 2048; + uspi->s_sbbase = 0; + flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; + if (!(sb->s_flags & MS_RDONLY)) { + if (!silent) + printk(KERN_INFO "ufstype=hp is supported read-only\n"); + sb->s_flags |= MS_RDONLY; + } + break; + default: + if (!silent) + printk("unknown ufstype\n"); + goto failed; + } + +again: + if (!sb_set_blocksize(sb, block_size)) { + printk(KERN_ERR "UFS: failed to set blocksize\n"); + goto failed; + } + + /* + * read ufs super block from device + */ + if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { + ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + SBLOCK_UFS2/block_size, super_block_size); + } + else { + ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + UFS_SBLOCK/block_size, super_block_size); + } + if (!ubh) + goto failed; + + + usb1 = ubh_get_usb_first(USPI_UBH); + usb2 = ubh_get_usb_second(USPI_UBH); + usb3 = ubh_get_usb_third(USPI_UBH); + usb = (struct ufs_super_block *) + ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ; + + /* + * Check ufs magic number + */ + sbi->s_bytesex = BYTESEX_LE; + switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { + case UFS_MAGIC: + case UFS2_MAGIC: + case UFS_MAGIC_LFN: + case UFS_MAGIC_FEA: + case UFS_MAGIC_4GB: + goto magic_found; + } + sbi->s_bytesex = BYTESEX_BE; + switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { + case UFS_MAGIC: + case UFS2_MAGIC: + case UFS_MAGIC_LFN: + case UFS_MAGIC_FEA: + case UFS_MAGIC_4GB: + goto magic_found; + } + + if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) + || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) + || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) + && uspi->s_sbbase < 256) { + ubh_brelse_uspi(uspi); + ubh = NULL; + uspi->s_sbbase += 8; + goto again; + } + if (!silent) + printk("ufs_read_super: bad magic number\n"); + goto failed; + +magic_found: + /* + * Check block and fragment sizes + */ + uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); + uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); + uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); + uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); + uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); + + if (uspi->s_fsize & (uspi->s_fsize - 1)) { + printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", + uspi->s_fsize); + goto failed; + } + if (uspi->s_fsize < 512) { + printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", + uspi->s_fsize); + goto failed; + } + if (uspi->s_fsize > 4096) { + printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", + uspi->s_fsize); + goto failed; + } + if (uspi->s_bsize & (uspi->s_bsize - 1)) { + printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", + uspi->s_bsize); + goto failed; + } + if (uspi->s_bsize < 4096) { + printk(KERN_ERR "ufs_read_super: block size %u is too small\n", + uspi->s_bsize); + goto failed; + } + if (uspi->s_bsize / uspi->s_fsize > 8) { + printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", + uspi->s_bsize / uspi->s_fsize); + goto failed; + } + if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { + ubh_brelse_uspi(uspi); + ubh = NULL; + block_size = uspi->s_fsize; + super_block_size = uspi->s_sbsize; + UFSD(("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size)) + goto again; + } + +#ifdef UFS_SUPER_DEBUG_MORE + if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) + ufs2_print_super_stuff(sb,usb); + else + ufs_print_super_stuff(sb, usb1, usb2, usb3); +#endif + + /* + * Check, if file system was correctly unmounted. + * If not, make it read only. + */ + if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || + ((flags & UFS_ST_MASK) == UFS_ST_OLD) || + (((flags & UFS_ST_MASK) == UFS_ST_SUN || + (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && + (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { + switch(usb1->fs_clean) { + case UFS_FSCLEAN: + UFSD(("fs is clean\n")) + break; + case UFS_FSSTABLE: + UFSD(("fs is stable\n")) + break; + case UFS_FSOSF1: + UFSD(("fs is DEC OSF/1\n")) + break; + case UFS_FSACTIVE: + printk("ufs_read_super: fs is active\n"); + sb->s_flags |= MS_RDONLY; + break; + case UFS_FSBAD: + printk("ufs_read_super: fs is bad\n"); + sb->s_flags |= MS_RDONLY; + break; + default: + printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); + sb->s_flags |= MS_RDONLY; + break; + } + } + else { + printk("ufs_read_super: fs needs fsck\n"); + sb->s_flags |= MS_RDONLY; + } + + /* + * Read ufs_super_block into internal data structures + */ + sb->s_op = &ufs_super_ops; + sb->dq_op = NULL; /***/ + sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); + + uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); + uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); + uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); + uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); + uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); + uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); + + if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { + uspi->s_u2_size = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size); + uspi->s_u2_dsize = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize); + } + else { + uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); + uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); + } + + uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); + /* s_bsize already set */ + /* s_fsize already set */ + uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); + uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); + uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); + uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); + uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); + uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); + UFSD(("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, + uspi->s_fshift)); + uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); + uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); + /* s_sbsize already set */ + uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); + uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); + uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); + uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); + uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); + uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); + uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); + uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); + uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); + uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); + uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); + uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); + uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); + uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); + uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); + uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); + uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_cpc); + uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize); + uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); + uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); + uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); + uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); + uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); + uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); + + /* + * Compute another frequently used values + */ + uspi->s_fpbmask = uspi->s_fpb - 1; + if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { + uspi->s_apbshift = uspi->s_bshift - 3; + } + else { + uspi->s_apbshift = uspi->s_bshift - 2; + } + uspi->s_2apbshift = uspi->s_apbshift * 2; + uspi->s_3apbshift = uspi->s_apbshift * 3; + uspi->s_apb = 1 << uspi->s_apbshift; + uspi->s_2apb = 1 << uspi->s_2apbshift; + uspi->s_3apb = 1 << uspi->s_3apbshift; + uspi->s_apbmask = uspi->s_apb - 1; + uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; + uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; + uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; + uspi->s_bpf = uspi->s_fsize << 3; + uspi->s_bpfshift = uspi->s_fshift + 3; + uspi->s_bpfmask = uspi->s_bpf - 1; + if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == + UFS_MOUNT_UFSTYPE_44BSD) + uspi->s_maxsymlinklen = + fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_maxsymlinklen); + + sbi->s_flags = flags; + + inode = iget(sb, UFS_ROOTINO); + if (!inode || is_bad_inode(inode)) + goto failed; + sb->s_root = d_alloc_root(inode); + if (!sb->s_root) + goto dalloc_failed; + + + /* + * Read cylinder group structures + */ + if (!(sb->s_flags & MS_RDONLY)) + if (!ufs_read_cylinder_structures(sb)) + goto failed; + + UFSD(("EXIT\n")) + return 0; + +dalloc_failed: + iput(inode); +failed: + if (ubh) ubh_brelse_uspi (uspi); + if (uspi) kfree (uspi); + if (sbi) kfree(sbi); + sb->s_fs_info = NULL; + UFSD(("EXIT (FAILED)\n")) + return -EINVAL; + +failed_nomem: + UFSD(("EXIT (NOMEM)\n")) + return -ENOMEM; +} + +static void ufs_write_super (struct super_block *sb) { + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct ufs_super_block_third * usb3; + unsigned flags; + + lock_kernel(); + + UFSD(("ENTER\n")) + flags = UFS_SB(sb)->s_flags; + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first(USPI_UBH); + usb3 = ubh_get_usb_third(USPI_UBH); + + if (!(sb->s_flags & MS_RDONLY)) { + usb1->fs_time = cpu_to_fs32(sb, get_seconds()); + if ((flags & UFS_ST_MASK) == UFS_ST_SUN + || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) + ufs_set_fs_state(sb, usb1, usb3, + UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); + ubh_mark_buffer_dirty (USPI_UBH); + } + sb->s_dirt = 0; + UFSD(("EXIT\n")) + unlock_kernel(); +} + +static void ufs_put_super (struct super_block *sb) +{ + struct ufs_sb_info * sbi = UFS_SB(sb); + + UFSD(("ENTER\n")) + + if (!(sb->s_flags & MS_RDONLY)) + ufs_put_cylinder_structures (sb); + + ubh_brelse_uspi (sbi->s_uspi); + kfree (sbi->s_uspi); + kfree (sbi); + sb->s_fs_info = NULL; + return; +} + + +static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) +{ + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct ufs_super_block_third * usb3; + unsigned new_mount_opt, ufstype; + unsigned flags; + + uspi = UFS_SB(sb)->s_uspi; + flags = UFS_SB(sb)->s_flags; + usb1 = ubh_get_usb_first(USPI_UBH); + usb3 = ubh_get_usb_third(USPI_UBH); + + /* + * Allow the "check" option to be passed as a remount option. + * It is not possible to change ufstype option during remount + */ + ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; + new_mount_opt = 0; + ufs_set_opt (new_mount_opt, ONERROR_LOCK); + if (!ufs_parse_options (data, &new_mount_opt)) + return -EINVAL; + if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { + new_mount_opt |= ufstype; + } + else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { + printk("ufstype can't be changed during remount\n"); + return -EINVAL; + } + + if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { + UFS_SB(sb)->s_mount_opt = new_mount_opt; + return 0; + } + + /* + * fs was mouted as rw, remounting ro + */ + if (*mount_flags & MS_RDONLY) { + ufs_put_cylinder_structures(sb); + usb1->fs_time = cpu_to_fs32(sb, get_seconds()); + if ((flags & UFS_ST_MASK) == UFS_ST_SUN + || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) + ufs_set_fs_state(sb, usb1, usb3, + UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); + ubh_mark_buffer_dirty (USPI_UBH); + sb->s_dirt = 0; + sb->s_flags |= MS_RDONLY; + } + /* + * fs was mounted as ro, remounting rw + */ + else { +#ifndef CONFIG_UFS_FS_WRITE + printk("ufs was compiled with read-only support, " + "can't be mounted as read-write\n"); + return -EINVAL; +#else + if (ufstype != UFS_MOUNT_UFSTYPE_SUN && + ufstype != UFS_MOUNT_UFSTYPE_44BSD && + ufstype != UFS_MOUNT_UFSTYPE_SUNx86) { + printk("this ufstype is read-only supported\n"); + return -EINVAL; + } + if (!ufs_read_cylinder_structures (sb)) { + printk("failed during remounting\n"); + return -EPERM; + } + sb->s_flags &= ~MS_RDONLY; +#endif + } + UFS_SB(sb)->s_mount_opt = new_mount_opt; + return 0; +} + +static int ufs_statfs (struct super_block *sb, struct kstatfs *buf) +{ + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct ufs_super_block * usb; + unsigned flags = 0; + + lock_kernel(); + + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first (USPI_UBH); + usb = (struct ufs_super_block *) + ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ; + + flags = UFS_SB(sb)->s_flags; + if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { + buf->f_type = UFS2_MAGIC; + buf->f_blocks = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize); + buf->f_bfree = ufs_blkstofrags(fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)) + + fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nffree); + buf->f_ffree = fs64_to_cpu(sb, + usb->fs_u11.fs_u2.fs_cstotal.cs_nifree); + } + else { + buf->f_type = UFS_MAGIC; + buf->f_blocks = uspi->s_dsize; + buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) + + fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); + buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); + } + buf->f_bsize = sb->s_blocksize; + buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) + ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; + buf->f_files = uspi->s_ncg * uspi->s_ipg; + buf->f_namelen = UFS_MAXNAMLEN; + + unlock_kernel(); + + return 0; +} + +static kmem_cache_t * ufs_inode_cachep; + +static struct inode *ufs_alloc_inode(struct super_block *sb) +{ + struct ufs_inode_info *ei; + ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL); + if (!ei) + return NULL; + ei->vfs_inode.i_version = 1; + return &ei->vfs_inode; +} + +static void ufs_destroy_inode(struct inode *inode) +{ + kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); +} + +static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) +{ + struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; + + if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == + SLAB_CTOR_CONSTRUCTOR) + inode_init_once(&ei->vfs_inode); +} + +static int init_inodecache(void) +{ + ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", + sizeof(struct ufs_inode_info), + 0, SLAB_RECLAIM_ACCOUNT, + init_once, NULL); + if (ufs_inode_cachep == NULL) + return -ENOMEM; + return 0; +} + +static void destroy_inodecache(void) +{ + if (kmem_cache_destroy(ufs_inode_cachep)) + printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n"); +} + +#ifdef CONFIG_QUOTA +static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t); +static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t); +#endif + +static struct super_operations ufs_super_ops = { + .alloc_inode = ufs_alloc_inode, + .destroy_inode = ufs_destroy_inode, + .read_inode = ufs_read_inode, + .write_inode = ufs_write_inode, + .delete_inode = ufs_delete_inode, + .put_super = ufs_put_super, + .write_super = ufs_write_super, + .statfs = ufs_statfs, + .remount_fs = ufs_remount, +#ifdef CONFIG_QUOTA + .quota_read = ufs_quota_read, + .quota_write = ufs_quota_write, +#endif +}; + +#ifdef CONFIG_QUOTA + +/* 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 ufs_quota_read(struct super_block *sb, int type, char *data, + size_t len, loff_t off) +{ + struct inode *inode = sb_dqopt(sb)->files[type]; + sector_t blk = off >> sb->s_blocksize_bits; + int err = 0; + int offset = off & (sb->s_blocksize - 1); + int tocopy; + size_t toread; + struct buffer_head *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; + + bh = ufs_bread(inode, blk, 0, &err); + if (err) + return err; + if (!bh) /* A hole? */ + memset(data, 0, tocopy); + else { + memcpy(data, bh->b_data+offset, tocopy); + brelse(bh); + } + offset = 0; + toread -= tocopy; + data += tocopy; + blk++; + } + return len; +} + +/* Write to quotafile */ +static ssize_t ufs_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]; + sector_t blk = off >> sb->s_blocksize_bits; + int err = 0; + int offset = off & (sb->s_blocksize - 1); + int tocopy; + size_t towrite = len; + struct buffer_head *bh; + + down(&inode->i_sem); + while (towrite > 0) { + tocopy = sb->s_blocksize - offset < towrite ? + sb->s_blocksize - offset : towrite; + + bh = ufs_bread(inode, blk, 1, &err); + if (!bh) + goto out; + lock_buffer(bh); + memcpy(bh->b_data+offset, data, tocopy); + flush_dcache_page(bh->b_page); + set_buffer_uptodate(bh); + mark_buffer_dirty(bh); + unlock_buffer(bh); + brelse(bh); + offset = 0; + towrite -= tocopy; + data += tocopy; + blk++; + } +out: + if (len == towrite) + 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_SEC; + mark_inode_dirty(inode); + up(&inode->i_sem); + return len - towrite; +} + +#endif + +static struct super_block *ufs_get_sb(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) +{ + return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super); +} + +static struct file_system_type ufs_fs_type = { + .owner = THIS_MODULE, + .name = "ufs", + .get_sb = ufs_get_sb, + .kill_sb = kill_block_super, + .fs_flags = FS_REQUIRES_DEV, +}; + +static int __init init_ufs_fs(void) +{ + int err = init_inodecache(); + if (err) + goto out1; + err = register_filesystem(&ufs_fs_type); + if (err) + goto out; + return 0; +out: + destroy_inodecache(); +out1: + return err; +} + +static void __exit exit_ufs_fs(void) +{ + unregister_filesystem(&ufs_fs_type); + destroy_inodecache(); +} + +module_init(init_ufs_fs) +module_exit(exit_ufs_fs) +MODULE_LICENSE("GPL"); diff --git a/fs/ufs/swab.h b/fs/ufs/swab.h new file mode 100644 index 0000000..1683d2b --- /dev/null +++ b/fs/ufs/swab.h @@ -0,0 +1,133 @@ +/* + * linux/fs/ufs/swab.h + * + * Copyright (C) 1997, 1998 Francois-Rene Rideau <fare@tunes.org> + * Copyright (C) 1998 Jakub Jelinek <jj@ultra.linux.cz> + * Copyright (C) 2001 Christoph Hellwig <hch@infradead.org> + */ + +#ifndef _UFS_SWAB_H +#define _UFS_SWAB_H + +/* + * Notes: + * HERE WE ASSUME EITHER BIG OR LITTLE ENDIAN UFSes + * in case there are ufs implementations that have strange bytesexes, + * you'll need to modify code here as well as in ufs_super.c and ufs_fs.h + * to support them. + */ + +enum { + BYTESEX_LE, + BYTESEX_BE +}; + +static inline u64 +fs64_to_cpu(struct super_block *sbp, __fs64 n) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + return le64_to_cpu((__force __le64)n); + else + return be64_to_cpu((__force __be64)n); +} + +static inline __fs64 +cpu_to_fs64(struct super_block *sbp, u64 n) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + return (__force __fs64)cpu_to_le64(n); + else + return (__force __fs64)cpu_to_be64(n); +} + +static __inline u32 +fs64_add(struct super_block *sbp, u32 *n, int d) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + return *n = cpu_to_le64(le64_to_cpu(*n)+d); + else + return *n = cpu_to_be64(be64_to_cpu(*n)+d); +} + +static __inline u32 +fs64_sub(struct super_block *sbp, u32 *n, int d) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + return *n = cpu_to_le64(le64_to_cpu(*n)-d); + else + return *n = cpu_to_be64(be64_to_cpu(*n)-d); +} + +static __inline u32 +fs32_to_cpu(struct super_block *sbp, __fs32 n) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + return le32_to_cpu((__force __le32)n); + else + return be32_to_cpu((__force __be32)n); +} + +static inline __fs32 +cpu_to_fs32(struct super_block *sbp, u32 n) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + return (__force __fs32)cpu_to_le32(n); + else + return (__force __fs32)cpu_to_be32(n); +} + +static inline void +fs32_add(struct super_block *sbp, __fs32 *n, int d) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + *(__le32 *)n = cpu_to_le32(le32_to_cpu(*(__le32 *)n)+d); + else + *(__be32 *)n = cpu_to_be32(be32_to_cpu(*(__be32 *)n)+d); +} + +static inline void +fs32_sub(struct super_block *sbp, __fs32 *n, int d) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + *(__le32 *)n = cpu_to_le32(le32_to_cpu(*(__le32 *)n)-d); + else + *(__be32 *)n = cpu_to_be32(be32_to_cpu(*(__be32 *)n)-d); +} + +static inline u16 +fs16_to_cpu(struct super_block *sbp, __fs16 n) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + return le16_to_cpu((__force __le16)n); + else + return be16_to_cpu((__force __be16)n); +} + +static inline __fs16 +cpu_to_fs16(struct super_block *sbp, u16 n) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + return (__force __fs16)cpu_to_le16(n); + else + return (__force __fs16)cpu_to_be16(n); +} + +static inline void +fs16_add(struct super_block *sbp, __fs16 *n, int d) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + *(__le16 *)n = cpu_to_le16(le16_to_cpu(*(__le16 *)n)+d); + else + *(__be16 *)n = cpu_to_be16(be16_to_cpu(*(__be16 *)n)+d); +} + +static inline void +fs16_sub(struct super_block *sbp, __fs16 *n, int d) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + *(__le16 *)n = cpu_to_le16(le16_to_cpu(*(__le16 *)n)-d); + else + *(__be16 *)n = cpu_to_be16(be16_to_cpu(*(__be16 *)n)-d); +} + +#endif /* _UFS_SWAB_H */ diff --git a/fs/ufs/symlink.c b/fs/ufs/symlink.c new file mode 100644 index 0000000..a0e4914 --- /dev/null +++ b/fs/ufs/symlink.c @@ -0,0 +1,42 @@ +/* + * linux/fs/ufs/symlink.c + * + * Only fast symlinks left here - the rest is done by generic code. AV, 1999 + * + * Copyright (C) 1998 + * Daniel Pirkl <daniel.pirkl@emai.cz> + * Charles University, Faculty of Mathematics and Physics + * + * from + * + * linux/fs/ext2/symlink.c + * + * Copyright (C) 1992, 1993, 1994, 1995 + * Remy Card (card@masi.ibp.fr) + * Laboratoire MASI - Institut Blaise Pascal + * Universite Pierre et Marie Curie (Paris VI) + * + * from + * + * linux/fs/minix/symlink.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * ext2 symlink handling code + */ + +#include <linux/fs.h> +#include <linux/namei.h> +#include <linux/ufs_fs.h> + +static int ufs_follow_link(struct dentry *dentry, struct nameidata *nd) +{ + struct ufs_inode_info *p = UFS_I(dentry->d_inode); + nd_set_link(nd, (char*)p->i_u1.i_symlink); + return 0; +} + +struct inode_operations ufs_fast_symlink_inode_operations = { + .readlink = generic_readlink, + .follow_link = ufs_follow_link, +}; diff --git a/fs/ufs/truncate.c b/fs/ufs/truncate.c new file mode 100644 index 0000000..e312bf8 --- /dev/null +++ b/fs/ufs/truncate.c @@ -0,0 +1,477 @@ +/* + * linux/fs/ufs/truncate.c + * + * Copyright (C) 1998 + * Daniel Pirkl <daniel.pirkl@email.cz> + * Charles University, Faculty of Mathematics and Physics + * + * from + * + * linux/fs/ext2/truncate.c + * + * Copyright (C) 1992, 1993, 1994, 1995 + * Remy Card (card@masi.ibp.fr) + * Laboratoire MASI - Institut Blaise Pascal + * Universite Pierre et Marie Curie (Paris VI) + * + * from + * + * linux/fs/minix/truncate.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * Big-endian to little-endian byte-swapping/bitmaps by + * David S. Miller (davem@caip.rutgers.edu), 1995 + */ + +/* + * Real random numbers for secure rm added 94/02/18 + * Idea from Pierre del Perugia <delperug@gla.ecoledoc.ibp.fr> + */ + +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/ufs_fs.h> +#include <linux/fcntl.h> +#include <linux/time.h> +#include <linux/stat.h> +#include <linux/string.h> +#include <linux/smp_lock.h> +#include <linux/buffer_head.h> +#include <linux/blkdev.h> +#include <linux/sched.h> + +#include "swab.h" +#include "util.h" + +#undef UFS_TRUNCATE_DEBUG + +#ifdef UFS_TRUNCATE_DEBUG +#define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x; +#else +#define UFSD(x) +#endif + +/* + * Secure deletion currently doesn't work. It interacts very badly + * with buffers shared with memory mappings, and for that reason + * can't be done in the truncate() routines. It should instead be + * done separately in "release()" before calling the truncate routines + * that will release the actual file blocks. + * + * Linus + */ + +#define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift) +#define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) + +#define DATA_BUFFER_USED(bh) \ + (atomic_read(&bh->b_count)>1 || buffer_locked(bh)) + +static int ufs_trunc_direct (struct inode * inode) +{ + struct ufs_inode_info *ufsi = UFS_I(inode); + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct buffer_head * bh; + __fs32 * p; + unsigned frag1, frag2, frag3, frag4, block1, block2; + unsigned frag_to_free, free_count; + unsigned i, j, tmp; + int retry; + + UFSD(("ENTER\n")) + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + + frag_to_free = 0; + free_count = 0; + retry = 0; + + frag1 = DIRECT_FRAGMENT; + frag4 = min_t(u32, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); + frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1); + frag3 = frag4 & ~uspi->s_fpbmask; + block1 = block2 = 0; + if (frag2 > frag3) { + frag2 = frag4; + frag3 = frag4 = 0; + } + else if (frag2 < frag3) { + block1 = ufs_fragstoblks (frag2); + block2 = ufs_fragstoblks (frag3); + } + + UFSD(("frag1 %u, frag2 %u, block1 %u, block2 %u, frag3 %u, frag4 %u\n", frag1, frag2, block1, block2, frag3, frag4)) + + if (frag1 >= frag2) + goto next1; + + /* + * Free first free fragments + */ + p = ufsi->i_u1.i_data + ufs_fragstoblks (frag1); + tmp = fs32_to_cpu(sb, *p); + if (!tmp ) + ufs_panic (sb, "ufs_trunc_direct", "internal error"); + frag1 = ufs_fragnum (frag1); + frag2 = ufs_fragnum (frag2); + for (j = frag1; j < frag2; j++) { + bh = sb_find_get_block (sb, tmp + j); + if ((bh && DATA_BUFFER_USED(bh)) || tmp != fs32_to_cpu(sb, *p)) { + retry = 1; + brelse (bh); + goto next1; + } + bforget (bh); + } + inode->i_blocks -= (frag2-frag1) << uspi->s_nspfshift; + mark_inode_dirty(inode); + ufs_free_fragments (inode, tmp + frag1, frag2 - frag1); + frag_to_free = tmp + frag1; + +next1: + /* + * Free whole blocks + */ + for (i = block1 ; i < block2; i++) { + p = ufsi->i_u1.i_data + i; + tmp = fs32_to_cpu(sb, *p); + if (!tmp) + continue; + for (j = 0; j < uspi->s_fpb; j++) { + bh = sb_find_get_block(sb, tmp + j); + if ((bh && DATA_BUFFER_USED(bh)) || tmp != fs32_to_cpu(sb, *p)) { + retry = 1; + brelse (bh); + goto next2; + } + bforget (bh); + } + *p = 0; + inode->i_blocks -= uspi->s_nspb; + mark_inode_dirty(inode); + if (free_count == 0) { + frag_to_free = tmp; + free_count = uspi->s_fpb; + } else if (free_count > 0 && frag_to_free == tmp - free_count) + free_count += uspi->s_fpb; + else { + ufs_free_blocks (inode, frag_to_free, free_count); + frag_to_free = tmp; + free_count = uspi->s_fpb; + } +next2:; + } + + if (free_count > 0) + ufs_free_blocks (inode, frag_to_free, free_count); + + if (frag3 >= frag4) + goto next3; + + /* + * Free last free fragments + */ + p = ufsi->i_u1.i_data + ufs_fragstoblks (frag3); + tmp = fs32_to_cpu(sb, *p); + if (!tmp ) + ufs_panic(sb, "ufs_truncate_direct", "internal error"); + frag4 = ufs_fragnum (frag4); + for (j = 0; j < frag4; j++) { + bh = sb_find_get_block (sb, tmp + j); + if ((bh && DATA_BUFFER_USED(bh)) || tmp != fs32_to_cpu(sb, *p)) { + retry = 1; + brelse (bh); + goto next1; + } + bforget (bh); + } + *p = 0; + inode->i_blocks -= frag4 << uspi->s_nspfshift; + mark_inode_dirty(inode); + ufs_free_fragments (inode, tmp, frag4); + next3: + + UFSD(("EXIT\n")) + return retry; +} + + +static int ufs_trunc_indirect (struct inode * inode, unsigned offset, __fs32 *p) +{ + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct ufs_buffer_head * ind_ubh; + struct buffer_head * bh; + __fs32 * ind; + unsigned indirect_block, i, j, tmp; + unsigned frag_to_free, free_count; + int retry; + + UFSD(("ENTER\n")) + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + + frag_to_free = 0; + free_count = 0; + retry = 0; + + tmp = fs32_to_cpu(sb, *p); + if (!tmp) + return 0; + ind_ubh = ubh_bread(sb, tmp, uspi->s_bsize); + if (tmp != fs32_to_cpu(sb, *p)) { + ubh_brelse (ind_ubh); + return 1; + } + if (!ind_ubh) { + *p = 0; + return 0; + } + + indirect_block = (DIRECT_BLOCK > offset) ? (DIRECT_BLOCK - offset) : 0; + for (i = indirect_block; i < uspi->s_apb; i++) { + ind = ubh_get_addr32 (ind_ubh, i); + tmp = fs32_to_cpu(sb, *ind); + if (!tmp) + continue; + for (j = 0; j < uspi->s_fpb; j++) { + bh = sb_find_get_block(sb, tmp + j); + if ((bh && DATA_BUFFER_USED(bh)) || tmp != fs32_to_cpu(sb, *ind)) { + retry = 1; + brelse (bh); + goto next; + } + bforget (bh); + } + *ind = 0; + ubh_mark_buffer_dirty(ind_ubh); + if (free_count == 0) { + frag_to_free = tmp; + free_count = uspi->s_fpb; + } else if (free_count > 0 && frag_to_free == tmp - free_count) + free_count += uspi->s_fpb; + else { + ufs_free_blocks (inode, frag_to_free, free_count); + frag_to_free = tmp; + free_count = uspi->s_fpb; + } + inode->i_blocks -= uspi->s_nspb; + mark_inode_dirty(inode); +next:; + } + + if (free_count > 0) { + ufs_free_blocks (inode, frag_to_free, free_count); + } + for (i = 0; i < uspi->s_apb; i++) + if (*ubh_get_addr32(ind_ubh,i)) + break; + if (i >= uspi->s_apb) { + if (ubh_max_bcount(ind_ubh) != 1) { + retry = 1; + } + else { + tmp = fs32_to_cpu(sb, *p); + *p = 0; + inode->i_blocks -= uspi->s_nspb; + mark_inode_dirty(inode); + ufs_free_blocks (inode, tmp, uspi->s_fpb); + ubh_bforget(ind_ubh); + ind_ubh = NULL; + } + } + if (IS_SYNC(inode) && ind_ubh && ubh_buffer_dirty(ind_ubh)) { + ubh_wait_on_buffer (ind_ubh); + ubh_ll_rw_block (WRITE, 1, &ind_ubh); + ubh_wait_on_buffer (ind_ubh); + } + ubh_brelse (ind_ubh); + + UFSD(("EXIT\n")) + + return retry; +} + +static int ufs_trunc_dindirect (struct inode *inode, unsigned offset, __fs32 *p) +{ + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct ufs_buffer_head * dind_bh; + unsigned i, tmp, dindirect_block; + __fs32 * dind; + int retry = 0; + + UFSD(("ENTER\n")) + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + + dindirect_block = (DIRECT_BLOCK > offset) + ? ((DIRECT_BLOCK - offset) >> uspi->s_apbshift) : 0; + retry = 0; + + tmp = fs32_to_cpu(sb, *p); + if (!tmp) + return 0; + dind_bh = ubh_bread(sb, tmp, uspi->s_bsize); + if (tmp != fs32_to_cpu(sb, *p)) { + ubh_brelse (dind_bh); + return 1; + } + if (!dind_bh) { + *p = 0; + return 0; + } + + for (i = dindirect_block ; i < uspi->s_apb ; i++) { + dind = ubh_get_addr32 (dind_bh, i); + tmp = fs32_to_cpu(sb, *dind); + if (!tmp) + continue; + retry |= ufs_trunc_indirect (inode, offset + (i << uspi->s_apbshift), dind); + ubh_mark_buffer_dirty(dind_bh); + } + + for (i = 0; i < uspi->s_apb; i++) + if (*ubh_get_addr32 (dind_bh, i)) + break; + if (i >= uspi->s_apb) { + if (ubh_max_bcount(dind_bh) != 1) + retry = 1; + else { + tmp = fs32_to_cpu(sb, *p); + *p = 0; + inode->i_blocks -= uspi->s_nspb; + mark_inode_dirty(inode); + ufs_free_blocks (inode, tmp, uspi->s_fpb); + ubh_bforget(dind_bh); + dind_bh = NULL; + } + } + if (IS_SYNC(inode) && dind_bh && ubh_buffer_dirty(dind_bh)) { + ubh_wait_on_buffer (dind_bh); + ubh_ll_rw_block (WRITE, 1, &dind_bh); + ubh_wait_on_buffer (dind_bh); + } + ubh_brelse (dind_bh); + + UFSD(("EXIT\n")) + + return retry; +} + +static int ufs_trunc_tindirect (struct inode * inode) +{ + struct ufs_inode_info *ufsi = UFS_I(inode); + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct ufs_buffer_head * tind_bh; + unsigned tindirect_block, tmp, i; + __fs32 * tind, * p; + int retry; + + UFSD(("ENTER\n")) + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + retry = 0; + + tindirect_block = (DIRECT_BLOCK > (UFS_NDADDR + uspi->s_apb + uspi->s_2apb)) + ? ((DIRECT_BLOCK - UFS_NDADDR - uspi->s_apb - uspi->s_2apb) >> uspi->s_2apbshift) : 0; + p = ufsi->i_u1.i_data + UFS_TIND_BLOCK; + if (!(tmp = fs32_to_cpu(sb, *p))) + return 0; + tind_bh = ubh_bread (sb, tmp, uspi->s_bsize); + if (tmp != fs32_to_cpu(sb, *p)) { + ubh_brelse (tind_bh); + return 1; + } + if (!tind_bh) { + *p = 0; + return 0; + } + + for (i = tindirect_block ; i < uspi->s_apb ; i++) { + tind = ubh_get_addr32 (tind_bh, i); + retry |= ufs_trunc_dindirect(inode, UFS_NDADDR + + uspi->s_apb + ((i + 1) << uspi->s_2apbshift), tind); + ubh_mark_buffer_dirty(tind_bh); + } + for (i = 0; i < uspi->s_apb; i++) + if (*ubh_get_addr32 (tind_bh, i)) + break; + if (i >= uspi->s_apb) { + if (ubh_max_bcount(tind_bh) != 1) + retry = 1; + else { + tmp = fs32_to_cpu(sb, *p); + *p = 0; + inode->i_blocks -= uspi->s_nspb; + mark_inode_dirty(inode); + ufs_free_blocks (inode, tmp, uspi->s_fpb); + ubh_bforget(tind_bh); + tind_bh = NULL; + } + } + if (IS_SYNC(inode) && tind_bh && ubh_buffer_dirty(tind_bh)) { + ubh_wait_on_buffer (tind_bh); + ubh_ll_rw_block (WRITE, 1, &tind_bh); + ubh_wait_on_buffer (tind_bh); + } + ubh_brelse (tind_bh); + + UFSD(("EXIT\n")) + return retry; +} + +void ufs_truncate (struct inode * inode) +{ + struct ufs_inode_info *ufsi = UFS_I(inode); + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct buffer_head * bh; + unsigned offset; + int err, retry; + + UFSD(("ENTER\n")) + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + + if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))) + return; + if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) + return; + lock_kernel(); + while (1) { + retry = ufs_trunc_direct(inode); + retry |= ufs_trunc_indirect (inode, UFS_IND_BLOCK, + (__fs32 *) &ufsi->i_u1.i_data[UFS_IND_BLOCK]); + retry |= ufs_trunc_dindirect (inode, UFS_IND_BLOCK + uspi->s_apb, + (__fs32 *) &ufsi->i_u1.i_data[UFS_DIND_BLOCK]); + retry |= ufs_trunc_tindirect (inode); + if (!retry) + break; + if (IS_SYNC(inode) && (inode->i_state & I_DIRTY)) + ufs_sync_inode (inode); + blk_run_address_space(inode->i_mapping); + yield(); + } + offset = inode->i_size & uspi->s_fshift; + if (offset) { + bh = ufs_bread (inode, inode->i_size >> uspi->s_fshift, 0, &err); + if (bh) { + memset (bh->b_data + offset, 0, uspi->s_fsize - offset); + mark_buffer_dirty (bh); + brelse (bh); + } + } + inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; + ufsi->i_lastfrag = DIRECT_FRAGMENT; + unlock_kernel(); + mark_inode_dirty(inode); + UFSD(("EXIT\n")) +} diff --git a/fs/ufs/util.c b/fs/ufs/util.c new file mode 100644 index 0000000..59acc8f --- /dev/null +++ b/fs/ufs/util.c @@ -0,0 +1,257 @@ +/* + * linux/fs/ufs/util.c + * + * Copyright (C) 1998 + * Daniel Pirkl <daniel.pirkl@email.cz> + * Charles University, Faculty of Mathematics and Physics + */ + +#include <linux/string.h> +#include <linux/slab.h> +#include <linux/ufs_fs.h> +#include <linux/buffer_head.h> + +#include "swab.h" +#include "util.h" + +#undef UFS_UTILS_DEBUG + +#ifdef UFS_UTILS_DEBUG +#define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x; +#else +#define UFSD(x) +#endif + + +struct ufs_buffer_head * _ubh_bread_ (struct ufs_sb_private_info * uspi, + struct super_block *sb, u64 fragment, u64 size) +{ + struct ufs_buffer_head * ubh; + unsigned i, j ; + u64 count = 0; + if (size & ~uspi->s_fmask) + return NULL; + count = size >> uspi->s_fshift; + if (count > UFS_MAXFRAG) + return NULL; + ubh = (struct ufs_buffer_head *) + kmalloc (sizeof (struct ufs_buffer_head), GFP_KERNEL); + if (!ubh) + return NULL; + ubh->fragment = fragment; + ubh->count = count; + for (i = 0; i < count; i++) + if (!(ubh->bh[i] = sb_bread(sb, fragment + i))) + goto failed; + for (; i < UFS_MAXFRAG; i++) + ubh->bh[i] = NULL; + return ubh; +failed: + for (j = 0; j < i; j++) + brelse (ubh->bh[j]); + kfree(ubh); + return NULL; +} + +struct ufs_buffer_head * ubh_bread_uspi (struct ufs_sb_private_info * uspi, + struct super_block *sb, u64 fragment, u64 size) +{ + unsigned i, j; + u64 count = 0; + if (size & ~uspi->s_fmask) + return NULL; + count = size >> uspi->s_fshift; + if (count <= 0 || count > UFS_MAXFRAG) + return NULL; + USPI_UBH->fragment = fragment; + USPI_UBH->count = count; + for (i = 0; i < count; i++) + if (!(USPI_UBH->bh[i] = sb_bread(sb, fragment + i))) + goto failed; + for (; i < UFS_MAXFRAG; i++) + USPI_UBH->bh[i] = NULL; + return USPI_UBH; +failed: + for (j = 0; j < i; j++) + brelse (USPI_UBH->bh[j]); + return NULL; +} + +void ubh_brelse (struct ufs_buffer_head * ubh) +{ + unsigned i; + if (!ubh) + return; + for (i = 0; i < ubh->count; i++) + brelse (ubh->bh[i]); + kfree (ubh); +} + +void ubh_brelse_uspi (struct ufs_sb_private_info * uspi) +{ + unsigned i; + if (!USPI_UBH) + return; + for ( i = 0; i < USPI_UBH->count; i++ ) { + brelse (USPI_UBH->bh[i]); + USPI_UBH->bh[i] = NULL; + } +} + +void ubh_mark_buffer_dirty (struct ufs_buffer_head * ubh) +{ + unsigned i; + if (!ubh) + return; + for ( i = 0; i < ubh->count; i++ ) + mark_buffer_dirty (ubh->bh[i]); +} + +void ubh_mark_buffer_uptodate (struct ufs_buffer_head * ubh, int flag) +{ + unsigned i; + if (!ubh) + return; + if (flag) { + for ( i = 0; i < ubh->count; i++ ) + set_buffer_uptodate (ubh->bh[i]); + } else { + for ( i = 0; i < ubh->count; i++ ) + clear_buffer_uptodate (ubh->bh[i]); + } +} + +void ubh_ll_rw_block (int rw, unsigned nr, struct ufs_buffer_head * ubh[]) +{ + unsigned i; + if (!ubh) + return; + for ( i = 0; i < nr; i++ ) + ll_rw_block (rw, ubh[i]->count, ubh[i]->bh); +} + +void ubh_wait_on_buffer (struct ufs_buffer_head * ubh) +{ + unsigned i; + if (!ubh) + return; + for ( i = 0; i < ubh->count; i++ ) + wait_on_buffer (ubh->bh[i]); +} + +unsigned ubh_max_bcount (struct ufs_buffer_head * ubh) +{ + unsigned i; + unsigned max = 0; + if (!ubh) + return 0; + for ( i = 0; i < ubh->count; i++ ) + if ( atomic_read(&ubh->bh[i]->b_count) > max ) + max = atomic_read(&ubh->bh[i]->b_count); + return max; +} + +void ubh_bforget (struct ufs_buffer_head * ubh) +{ + unsigned i; + if (!ubh) + return; + for ( i = 0; i < ubh->count; i++ ) if ( ubh->bh[i] ) + bforget (ubh->bh[i]); +} + +int ubh_buffer_dirty (struct ufs_buffer_head * ubh) +{ + unsigned i; + unsigned result = 0; + if (!ubh) + return 0; + for ( i = 0; i < ubh->count; i++ ) + result |= buffer_dirty(ubh->bh[i]); + return result; +} + +void _ubh_ubhcpymem_(struct ufs_sb_private_info * uspi, + unsigned char * mem, struct ufs_buffer_head * ubh, unsigned size) +{ + unsigned len, bhno; + if (size > (ubh->count << uspi->s_fshift)) + size = ubh->count << uspi->s_fshift; + bhno = 0; + while (size) { + len = min_t(unsigned int, size, uspi->s_fsize); + memcpy (mem, ubh->bh[bhno]->b_data, len); + mem += uspi->s_fsize; + size -= len; + bhno++; + } +} + +void _ubh_memcpyubh_(struct ufs_sb_private_info * uspi, + struct ufs_buffer_head * ubh, unsigned char * mem, unsigned size) +{ + unsigned len, bhno; + if (size > (ubh->count << uspi->s_fshift)) + size = ubh->count << uspi->s_fshift; + bhno = 0; + while (size) { + len = min_t(unsigned int, size, uspi->s_fsize); + memcpy (ubh->bh[bhno]->b_data, mem, len); + mem += uspi->s_fsize; + size -= len; + bhno++; + } +} + +dev_t +ufs_get_inode_dev(struct super_block *sb, struct ufs_inode_info *ufsi) +{ + __fs32 fs32; + dev_t dev; + + if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86) + fs32 = ufsi->i_u1.i_data[1]; + else + fs32 = ufsi->i_u1.i_data[0]; + fs32 = fs32_to_cpu(sb, fs32); + switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) { + case UFS_ST_SUNx86: + case UFS_ST_SUN: + if ((fs32 & 0xffff0000) == 0 || + (fs32 & 0xffff0000) == 0xffff0000) + dev = old_decode_dev(fs32 & 0x7fff); + else + dev = MKDEV(sysv_major(fs32), sysv_minor(fs32)); + break; + + default: + dev = old_decode_dev(fs32); + break; + } + return dev; +} + +void +ufs_set_inode_dev(struct super_block *sb, struct ufs_inode_info *ufsi, dev_t dev) +{ + __fs32 fs32; + + switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) { + case UFS_ST_SUNx86: + case UFS_ST_SUN: + fs32 = sysv_encode_dev(dev); + if ((fs32 & 0xffff8000) == 0) { + fs32 = old_encode_dev(dev); + } + break; + + default: + fs32 = old_encode_dev(dev); + break; + } + fs32 = cpu_to_fs32(sb, fs32); + if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86) + ufsi->i_u1.i_data[1] = fs32; + else + ufsi->i_u1.i_data[0] = fs32; +} diff --git a/fs/ufs/util.h b/fs/ufs/util.h new file mode 100644 index 0000000..b264007 --- /dev/null +++ b/fs/ufs/util.h @@ -0,0 +1,526 @@ +/* + * linux/fs/ufs/util.h + * + * Copyright (C) 1998 + * Daniel Pirkl <daniel.pirkl@email.cz> + * Charles University, Faculty of Mathematics and Physics + */ + +#include <linux/buffer_head.h> +#include <linux/fs.h> +#include "swab.h" + + +/* + * some useful macros + */ +#define in_range(b,first,len) ((b)>=(first)&&(b)<(first)+(len)) + +/* + * macros used for retyping + */ +#define UCPI_UBH ((struct ufs_buffer_head *)ucpi) +#define USPI_UBH ((struct ufs_buffer_head *)uspi) + + + +/* + * macros used for accessing structures + */ +static inline s32 +ufs_get_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1, + struct ufs_super_block_third *usb3) +{ + switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) { + case UFS_ST_SUN: + return fs32_to_cpu(sb, usb3->fs_u2.fs_sun.fs_state); + case UFS_ST_SUNx86: + return fs32_to_cpu(sb, usb1->fs_u1.fs_sunx86.fs_state); + case UFS_ST_44BSD: + default: + return fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_state); + } +} + +static inline void +ufs_set_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1, + struct ufs_super_block_third *usb3, s32 value) +{ + switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) { + case UFS_ST_SUN: + usb3->fs_u2.fs_sun.fs_state = cpu_to_fs32(sb, value); + break; + case UFS_ST_SUNx86: + usb1->fs_u1.fs_sunx86.fs_state = cpu_to_fs32(sb, value); + break; + case UFS_ST_44BSD: + usb3->fs_u2.fs_44.fs_state = cpu_to_fs32(sb, value); + break; + } +} + +static inline u32 +ufs_get_fs_npsect(struct super_block *sb, struct ufs_super_block_first *usb1, + struct ufs_super_block_third *usb3) +{ + if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86) + return fs32_to_cpu(sb, usb3->fs_u2.fs_sunx86.fs_npsect); + else + return fs32_to_cpu(sb, usb1->fs_u1.fs_sun.fs_npsect); +} + +static inline u64 +ufs_get_fs_qbmask(struct super_block *sb, struct ufs_super_block_third *usb3) +{ + __fs64 tmp; + + switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) { + case UFS_ST_SUN: + ((__fs32 *)&tmp)[0] = usb3->fs_u2.fs_sun.fs_qbmask[0]; + ((__fs32 *)&tmp)[1] = usb3->fs_u2.fs_sun.fs_qbmask[1]; + break; + case UFS_ST_SUNx86: + ((__fs32 *)&tmp)[0] = usb3->fs_u2.fs_sunx86.fs_qbmask[0]; + ((__fs32 *)&tmp)[1] = usb3->fs_u2.fs_sunx86.fs_qbmask[1]; + break; + case UFS_ST_44BSD: + ((__fs32 *)&tmp)[0] = usb3->fs_u2.fs_44.fs_qbmask[0]; + ((__fs32 *)&tmp)[1] = usb3->fs_u2.fs_44.fs_qbmask[1]; + break; + } + + return fs64_to_cpu(sb, tmp); +} + +static inline u64 +ufs_get_fs_qfmask(struct super_block *sb, struct ufs_super_block_third *usb3) +{ + __fs64 tmp; + + switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) { + case UFS_ST_SUN: + ((__fs32 *)&tmp)[0] = usb3->fs_u2.fs_sun.fs_qfmask[0]; + ((__fs32 *)&tmp)[1] = usb3->fs_u2.fs_sun.fs_qfmask[1]; + break; + case UFS_ST_SUNx86: + ((__fs32 *)&tmp)[0] = usb3->fs_u2.fs_sunx86.fs_qfmask[0]; + ((__fs32 *)&tmp)[1] = usb3->fs_u2.fs_sunx86.fs_qfmask[1]; + break; + case UFS_ST_44BSD: + ((__fs32 *)&tmp)[0] = usb3->fs_u2.fs_44.fs_qfmask[0]; + ((__fs32 *)&tmp)[1] = usb3->fs_u2.fs_44.fs_qfmask[1]; + break; + } + + return fs64_to_cpu(sb, tmp); +} + +static inline u16 +ufs_get_de_namlen(struct super_block *sb, struct ufs_dir_entry *de) +{ + if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD) + return fs16_to_cpu(sb, de->d_u.d_namlen); + else + return de->d_u.d_44.d_namlen; /* XXX this seems wrong */ +} + +static inline void +ufs_set_de_namlen(struct super_block *sb, struct ufs_dir_entry *de, u16 value) +{ + if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD) + de->d_u.d_namlen = cpu_to_fs16(sb, value); + else + de->d_u.d_44.d_namlen = value; /* XXX this seems wrong */ +} + +static inline void +ufs_set_de_type(struct super_block *sb, struct ufs_dir_entry *de, int mode) +{ + if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) != UFS_DE_44BSD) + return; + + /* + * TODO turn this into a table lookup + */ + switch (mode & S_IFMT) { + case S_IFSOCK: + de->d_u.d_44.d_type = DT_SOCK; + break; + case S_IFLNK: + de->d_u.d_44.d_type = DT_LNK; + break; + case S_IFREG: + de->d_u.d_44.d_type = DT_REG; + break; + case S_IFBLK: + de->d_u.d_44.d_type = DT_BLK; + break; + case S_IFDIR: + de->d_u.d_44.d_type = DT_DIR; + break; + case S_IFCHR: + de->d_u.d_44.d_type = DT_CHR; + break; + case S_IFIFO: + de->d_u.d_44.d_type = DT_FIFO; + break; + default: + de->d_u.d_44.d_type = DT_UNKNOWN; + } +} + +static inline u32 +ufs_get_inode_uid(struct super_block *sb, struct ufs_inode *inode) +{ + switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) { + case UFS_UID_EFT: + return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_uid); + case UFS_UID_44BSD: + return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_uid); + default: + return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_suid); + } +} + +static inline void +ufs_set_inode_uid(struct super_block *sb, struct ufs_inode *inode, u32 value) +{ + switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) { + case UFS_UID_EFT: + inode->ui_u3.ui_sun.ui_uid = cpu_to_fs32(sb, value); + break; + case UFS_UID_44BSD: + inode->ui_u3.ui_44.ui_uid = cpu_to_fs32(sb, value); + break; + } + inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value); +} + +static inline u32 +ufs_get_inode_gid(struct super_block *sb, struct ufs_inode *inode) +{ + switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) { + case UFS_UID_EFT: + return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid); + case UFS_UID_44BSD: + return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_gid); + default: + return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_sgid); + } +} + +static inline void +ufs_set_inode_gid(struct super_block *sb, struct ufs_inode *inode, u32 value) +{ + switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) { + case UFS_UID_EFT: + inode->ui_u3.ui_sun.ui_gid = cpu_to_fs32(sb, value); + break; + case UFS_UID_44BSD: + inode->ui_u3.ui_44.ui_gid = cpu_to_fs32(sb, value); + break; + } + inode->ui_u1.oldids.ui_sgid = cpu_to_fs16(sb, value); +} + +extern dev_t ufs_get_inode_dev(struct super_block *, struct ufs_inode_info *); +extern void ufs_set_inode_dev(struct super_block *, struct ufs_inode_info *, dev_t); + +/* + * These functions manipulate ufs buffers + */ +#define ubh_bread(sb,fragment,size) _ubh_bread_(uspi,sb,fragment,size) +extern struct ufs_buffer_head * _ubh_bread_(struct ufs_sb_private_info *, struct super_block *, u64 , u64); +extern struct ufs_buffer_head * ubh_bread_uspi(struct ufs_sb_private_info *, struct super_block *, u64, u64); +extern void ubh_brelse (struct ufs_buffer_head *); +extern void ubh_brelse_uspi (struct ufs_sb_private_info *); +extern void ubh_mark_buffer_dirty (struct ufs_buffer_head *); +extern void ubh_mark_buffer_uptodate (struct ufs_buffer_head *, int); +extern void ubh_ll_rw_block (int, unsigned, struct ufs_buffer_head **); +extern void ubh_wait_on_buffer (struct ufs_buffer_head *); +extern unsigned ubh_max_bcount (struct ufs_buffer_head *); +extern void ubh_bforget (struct ufs_buffer_head *); +extern int ubh_buffer_dirty (struct ufs_buffer_head *); +#define ubh_ubhcpymem(mem,ubh,size) _ubh_ubhcpymem_(uspi,mem,ubh,size) +extern void _ubh_ubhcpymem_(struct ufs_sb_private_info *, unsigned char *, struct ufs_buffer_head *, unsigned); +#define ubh_memcpyubh(ubh,mem,size) _ubh_memcpyubh_(uspi,ubh,mem,size) +extern void _ubh_memcpyubh_(struct ufs_sb_private_info *, struct ufs_buffer_head *, unsigned char *, unsigned); + + + +/* + * macros to get important structures from ufs_buffer_head + */ +#define ubh_get_usb_first(ubh) \ + ((struct ufs_super_block_first *)((ubh)->bh[0]->b_data)) + +#define ubh_get_usb_second(ubh) \ + ((struct ufs_super_block_second *)(ubh)-> \ + bh[UFS_SECTOR_SIZE >> uspi->s_fshift]->b_data + (UFS_SECTOR_SIZE & ~uspi->s_fmask)) + +#define ubh_get_usb_third(ubh) \ + ((struct ufs_super_block_third *)((ubh)-> \ + bh[UFS_SECTOR_SIZE*2 >> uspi->s_fshift]->b_data + (UFS_SECTOR_SIZE*2 & ~uspi->s_fmask))) + +#define ubh_get_ucg(ubh) \ + ((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data)) + + +/* + * Extract byte from ufs_buffer_head + * Extract the bits for a block from a map inside ufs_buffer_head + */ +#define ubh_get_addr8(ubh,begin) \ + ((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \ + ((begin) & ~uspi->s_fmask)) + +#define ubh_get_addr16(ubh,begin) \ + (((__fs16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \ + ((begin) & (uspi->fsize>>1) - 1))) + +#define ubh_get_addr32(ubh,begin) \ + (((__fs32*)((ubh)->bh[(begin) >> (uspi->s_fshift-2)]->b_data)) + \ + ((begin) & ((uspi->s_fsize>>2) - 1))) + +#define ubh_get_addr ubh_get_addr8 + +#define ubh_blkmap(ubh,begin,bit) \ + ((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb))) + + +/* + * Macros for access to superblock array structures + */ +#define ubh_postbl(ubh,cylno,i) \ + ((uspi->s_postblformat != UFS_DYNAMICPOSTBLFMT) \ + ? (*(__s16*)(ubh_get_addr(ubh, \ + (unsigned)(&((struct ufs_super_block *)0)->fs_opostbl) \ + + (((cylno) * 16 + (i)) << 1) ) )) \ + : (*(__s16*)(ubh_get_addr(ubh, \ + uspi->s_postbloff + (((cylno) * uspi->s_nrpos + (i)) << 1) )))) + +#define ubh_rotbl(ubh,i) \ + ((uspi->s_postblformat != UFS_DYNAMICPOSTBLFMT) \ + ? (*(__u8*)(ubh_get_addr(ubh, \ + (unsigned)(&((struct ufs_super_block *)0)->fs_space) + (i)))) \ + : (*(__u8*)(ubh_get_addr(ubh, uspi->s_rotbloff + (i))))) + +/* + * Determine the number of available frags given a + * percentage to hold in reserve. + */ +#define ufs_freespace(usb, percentreserved) \ + (ufs_blkstofrags(fs32_to_cpu(sb, (usb)->fs_cstotal.cs_nbfree)) + \ + fs32_to_cpu(sb, (usb)->fs_cstotal.cs_nffree) - (uspi->s_dsize * (percentreserved) / 100)) + +/* + * Macros to access cylinder group array structures + */ +#define ubh_cg_blktot(ucpi,cylno) \ + (*((__fs32*)ubh_get_addr(UCPI_UBH, (ucpi)->c_btotoff + ((cylno) << 2)))) + +#define ubh_cg_blks(ucpi,cylno,rpos) \ + (*((__fs16*)ubh_get_addr(UCPI_UBH, \ + (ucpi)->c_boff + (((cylno) * uspi->s_nrpos + (rpos)) << 1 )))) + +/* + * Bitmap operations + * These functions work like classical bitmap operations. + * The difference is that we don't have the whole bitmap + * in one contiguous chunk of memory, but in several buffers. + * The parameters of each function are super_block, ufs_buffer_head and + * position of the beginning of the bitmap. + */ +#define ubh_setbit(ubh,begin,bit) \ + (*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) |= (1 << ((bit) & 7))) + +#define ubh_clrbit(ubh,begin,bit) \ + (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7))) + +#define ubh_isset(ubh,begin,bit) \ + (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7))) + +#define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit)) + +#define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0) + +#define ubh_find_next_zero_bit(ubh,begin,size,offset) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,offset) +static inline unsigned _ubh_find_next_zero_bit_( + struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh, + unsigned begin, unsigned size, unsigned offset) +{ + unsigned base, count, pos; + + size -= offset; + begin <<= 3; + offset += begin; + base = offset >> uspi->s_bpfshift; + offset &= uspi->s_bpfmask; + for (;;) { + count = min_t(unsigned int, size + offset, uspi->s_bpf); + size -= count - offset; + pos = ext2_find_next_zero_bit (ubh->bh[base]->b_data, count, offset); + if (pos < count || !size) + break; + base++; + offset = 0; + } + return (base << uspi->s_bpfshift) + pos - begin; +} + +static inline unsigned find_last_zero_bit (unsigned char * bitmap, + unsigned size, unsigned offset) +{ + unsigned bit, i; + unsigned char * mapp; + unsigned char map; + + mapp = bitmap + (size >> 3); + map = *mapp--; + bit = 1 << (size & 7); + for (i = size; i > offset; i--) { + if ((map & bit) == 0) + break; + if ((i & 7) != 0) { + bit >>= 1; + } else { + map = *mapp--; + bit = 1 << 7; + } + } + return i; +} + +#define ubh_find_last_zero_bit(ubh,begin,size,offset) _ubh_find_last_zero_bit_(uspi,ubh,begin,size,offset) +static inline unsigned _ubh_find_last_zero_bit_( + struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh, + unsigned begin, unsigned start, unsigned end) +{ + unsigned base, count, pos, size; + + size = start - end; + begin <<= 3; + start += begin; + base = start >> uspi->s_bpfshift; + start &= uspi->s_bpfmask; + for (;;) { + count = min_t(unsigned int, + size + (uspi->s_bpf - start), uspi->s_bpf) + - (uspi->s_bpf - start); + size -= count; + pos = find_last_zero_bit (ubh->bh[base]->b_data, + start, start - count); + if (pos > start - count || !size) + break; + base--; + start = uspi->s_bpf; + } + return (base << uspi->s_bpfshift) + pos - begin; +} + +#define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block)) + +#define ubh_isblockset(ubh,begin,block) _ubh_isblockset_(uspi,ubh,begin,block) +static inline int _ubh_isblockset_(struct ufs_sb_private_info * uspi, + struct ufs_buffer_head * ubh, unsigned begin, unsigned block) +{ + switch (uspi->s_fpb) { + case 8: + return (*ubh_get_addr (ubh, begin + block) == 0xff); + case 4: + return (*ubh_get_addr (ubh, begin + (block >> 1)) == (0x0f << ((block & 0x01) << 2))); + case 2: + return (*ubh_get_addr (ubh, begin + (block >> 2)) == (0x03 << ((block & 0x03) << 1))); + case 1: + return (*ubh_get_addr (ubh, begin + (block >> 3)) == (0x01 << (block & 0x07))); + } + return 0; +} + +#define ubh_clrblock(ubh,begin,block) _ubh_clrblock_(uspi,ubh,begin,block) +static inline void _ubh_clrblock_(struct ufs_sb_private_info * uspi, + struct ufs_buffer_head * ubh, unsigned begin, unsigned block) +{ + switch (uspi->s_fpb) { + case 8: + *ubh_get_addr (ubh, begin + block) = 0x00; + return; + case 4: + *ubh_get_addr (ubh, begin + (block >> 1)) &= ~(0x0f << ((block & 0x01) << 2)); + return; + case 2: + *ubh_get_addr (ubh, begin + (block >> 2)) &= ~(0x03 << ((block & 0x03) << 1)); + return; + case 1: + *ubh_get_addr (ubh, begin + (block >> 3)) &= ~(0x01 << ((block & 0x07))); + return; + } +} + +#define ubh_setblock(ubh,begin,block) _ubh_setblock_(uspi,ubh,begin,block) +static inline void _ubh_setblock_(struct ufs_sb_private_info * uspi, + struct ufs_buffer_head * ubh, unsigned begin, unsigned block) +{ + switch (uspi->s_fpb) { + case 8: + *ubh_get_addr(ubh, begin + block) = 0xff; + return; + case 4: + *ubh_get_addr(ubh, begin + (block >> 1)) |= (0x0f << ((block & 0x01) << 2)); + return; + case 2: + *ubh_get_addr(ubh, begin + (block >> 2)) |= (0x03 << ((block & 0x03) << 1)); + return; + case 1: + *ubh_get_addr(ubh, begin + (block >> 3)) |= (0x01 << ((block & 0x07))); + return; + } +} + +static inline void ufs_fragacct (struct super_block * sb, unsigned blockmap, + __fs32 * fraglist, int cnt) +{ + struct ufs_sb_private_info * uspi; + unsigned fragsize, pos; + + uspi = UFS_SB(sb)->s_uspi; + + fragsize = 0; + for (pos = 0; pos < uspi->s_fpb; pos++) { + if (blockmap & (1 << pos)) { + fragsize++; + } + else if (fragsize > 0) { + fs32_add(sb, &fraglist[fragsize], cnt); + fragsize = 0; + } + } + if (fragsize > 0 && fragsize < uspi->s_fpb) + fs32_add(sb, &fraglist[fragsize], cnt); +} + +#define ubh_scanc(ubh,begin,size,table,mask) _ubh_scanc_(uspi,ubh,begin,size,table,mask) +static inline unsigned _ubh_scanc_(struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh, + unsigned begin, unsigned size, unsigned char * table, unsigned char mask) +{ + unsigned rest, offset; + unsigned char * cp; + + + offset = begin & ~uspi->s_fmask; + begin >>= uspi->s_fshift; + for (;;) { + if ((offset + size) < uspi->s_fsize) + rest = size; + else + rest = uspi->s_fsize - offset; + size -= rest; + cp = ubh->bh[begin]->b_data + offset; + while ((table[*cp++] & mask) == 0 && --rest); + if (rest || !size) + break; + begin++; + offset = 0; + } + return (size + rest); +} |
