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* UBIFS: remove mst_mutexArtem Bityutskiy2014-07-191-2/+0
| | | | | | | | | The 'mst_mutex' is not needed since because 'ubifs_write_master()' is only called on the mount path and commit path. The mount path is sequential and there is no parallelism, and the commit path is also serialized - there is only one commit going on at a time. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
* UBIFS: remove useless @ecc in struct ubifs_scan_lebhujianyang2014-07-191-2/+0
| | | | | | | | | | | We set @ecc in ubifs_scan_leb only if leb_read returns EBADMSG and do not use it any more. This patch removes this variable and adds comments about EBADMSG handling. Artem: re-phrase commentaries Signed-off-by: hujianyang <hujianyang@huawei.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
* UBIFS: respect MS_SILENT mount flagDaniel Golle2014-06-021-0/+11
| | | | | | | | | | | | When attempting to mount a non-ubifs formatted volume, lots of error messages (including a stack dump) are thrown to the kernel log even if the MS_SILENT mount flag is set. Fix this by introducing adding an additional state-variable in struct ubifs_info and suppress error messages in ubifs_read_node if MS_SILENT is set. Signed-off-by: Daniel Golle <daniel@makrotopia.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
* fs: convert fs shrinkers to new scan/count APIDave Chinner2013-09-101-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Convert the filesystem shrinkers to use the new API, and standardise some of the behaviours of the shrinkers at the same time. For example, nr_to_scan means the number of objects to scan, not the number of objects to free. I refactored the CIFS idmap shrinker a little - it really needs to be broken up into a shrinker per tree and keep an item count with the tree root so that we don't need to walk the tree every time the shrinker needs to count the number of objects in the tree (i.e. all the time under memory pressure). [glommer@openvz.org: fixes for ext4, ubifs, nfs, cifs and glock. Fixes are needed mainly due to new code merged in the tree] [assorted fixes folded in] Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Glauber Costa <glommer@openvz.org> Acked-by: Mel Gorman <mgorman@suse.de> Acked-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Acked-by: Jan Kara <jack@suse.cz> Acked-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Cc: Arve Hjønnevåg <arve@android.com> Cc: Carlos Maiolino <cmaiolino@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Chuck Lever <chuck.lever@oracle.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: David Rientjes <rientjes@google.com> Cc: Gleb Natapov <gleb@redhat.com> Cc: Greg Thelen <gthelen@google.com> Cc: J. Bruce Fields <bfields@redhat.com> Cc: Jan Kara <jack@suse.cz> Cc: Jerome Glisse <jglisse@redhat.com> Cc: John Stultz <john.stultz@linaro.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Kent Overstreet <koverstreet@google.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Thomas Hellstrom <thellstrom@vmware.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* UBIFS: fix double free of ubifs_orphan objectsAdam Thomas2013-02-041-0/+2
| | | | | | | | | | | | | | The last orphan in the dnext list has its dnext set to NULL. Because of that, ubifs_delete_orphan assumes that it is not on the dnext list and frees it immediately instead ignoring it as a second delete. The orphan is later freed again by erase_deleted. This change adds an explicit flag to ubifs_orphan indicating whether it is pending delete. Signed-off-by: Adam Thomas <adamthomas1111@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Cc: stable@vger.kernel.org
* UBIFS: fix use of freed ubifs_orphan objectsAdam Thomas2013-02-041-1/+3
| | | | | | | | | | | | | | | | | | | | | | | The last orphan in the cnext list has its cnext set to NULL. Because of that, ubifs_delete_orphan assumes that it is not on the cnext list and frees it immediately instead of adding it to the dnext list. The freed orphan is later modified by write_orph_node. This can cause various inconsistencies including directory entries that cannot be removed and this error: UBIFS error (pid 20685): layout_cnodes: LPT out of space at LEB 14:129009 needing 17, done_ltab 1, done_lsave 1 This is a regression introduced by "7074e5eb UBIFS: remove invalid reference to list iterator variable". This change adds an explicit flag to ubifs_orphan indicating whether it is pending commit. Signed-off-by: Adam Thomas <adamthomas1111@gmail.com> Reviewed-by: Adrian Hunter <adrian.hunter@intel.com> Cc: stable@vger.kernel.org # v3.6+ Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
* UBIFS: introduce categorized lprops counterArtem Bityutskiy2012-10-261-0/+3
| | | | | | | | This commit is a preparation for a subsequent bugfix. We introduce a counter for categorized lprops. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Cc: stable@vger.kernel.org
* Merge tag 'upstream-3.7-rc1' of git://git.infradead.org/linux-ubifsLinus Torvalds2012-10-021-7/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull ubifs changes from Artem Bityutskiy: "No big changes for 3.7 in UBIFS: - Error reporting and debug printing improvements - Power cut emulation fixes - Minor cleanups" Fix trivial conflict in fs/ubifs/debug.c due to the user namespace changes. * tag 'upstream-3.7-rc1' of git://git.infradead.org/linux-ubifs: UBIFS: print less UBIFS: use pr_ helper instead of printk UBIFS: comply with coding style UBIFS: use __aligned() attribute UBIFS: remove __DATE__ and __TIME__ UBIFS: fix power cut emulation for mtdram UBIFS: improve scanning debug output UBIFS: always print full error reports UBIFS: print PID in debug messages
| * UBIFS: use pr_ helper instead of printkArtem Bityutskiy2012-08-311-7/+6
| | | | | | | | | | | | Use 'pr_err()' instead of 'printk(KERN_ERR', etc. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
* | userns: Convert ubifs to use kuid/kgidEric W. Biederman2012-09-211-2/+2
|/ | | | | | | Cc: Artem Bityutskiy <dedekind1@gmail.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Serge Hallyn <serge.hallyn@canonical.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
* UBI: Kill data type hintRichard Weinberger2012-05-201-10/+5
| | | | | | | | | | | We do not need this feature and to our shame it even was not working and there was a bug found very recently. -- Artem Bityutskiy Without the data type hint UBI2 (fastmap) will be easier to implement. Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
* UBIFS: remove Kconfig debugging optionArtem Bityutskiy2012-05-161-5/+6
| | | | | | | Have the debugging stuff always compiled-in instead. It simplifies maintanance a lot. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
* UBIFS: kill CUR_MAX_KEY_LEN macroArtem Bityutskiy2012-02-291-7/+4
| | | | | | | | It is useless and confusing and may make people believe they may just change it, which is not true, because this will also change the on-flash format. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
* ubifs: propagate umode_tAl Viro2012-01-031-1/+1
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'for-linus' of ↵Linus Torvalds2011-07-221-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (107 commits) vfs: use ERR_CAST for err-ptr tossing in lookup_instantiate_filp isofs: Remove global fs lock jffs2: fix IN_DELETE_SELF on overwriting rename() killing a directory fix IN_DELETE_SELF on overwriting rename() on ramfs et.al. mm/truncate.c: fix build for CONFIG_BLOCK not enabled fs:update the NOTE of the file_operations structure Remove dead code in dget_parent() AFS: Fix silly characters in a comment switch d_add_ci() to d_splice_alias() in "found negative" case as well simplify gfs2_lookup() jfs_lookup(): don't bother with . or .. get rid of useless dget_parent() in btrfs rename() and link() get rid of useless dget_parent() in fs/btrfs/ioctl.c fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers drivers: fix up various ->llseek() implementations fs: handle SEEK_HOLE/SEEK_DATA properly in all fs's that define their own llseek Ext4: handle SEEK_HOLE/SEEK_DATA generically Btrfs: implement our own ->llseek fs: add SEEK_HOLE and SEEK_DATA flags reiserfs: make reiserfs default to barrier=flush ... Fix up trivial conflicts in fs/xfs/linux-2.6/xfs_super.c due to the new shrinker callout for the inode cache, that clashed with the xfs code to start the periodic workers later.
| * fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlersJosef Bacik2011-07-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Btrfs needs to be able to control how filemap_write_and_wait_range() is called in fsync to make it less of a painful operation, so push down taking i_mutex and the calling of filemap_write_and_wait() down into the ->fsync() handlers. Some file systems can drop taking the i_mutex altogether it seems, like ext3 and ocfs2. For correctness sake I just pushed everything down in all cases to make sure that we keep the current behavior the same for everybody, and then each individual fs maintainer can make up their mind about what to do from there. Thanks, Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | UBIFS: introduce more I/O helpersArtem Bityutskiy2011-07-041-2/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce the following I/O helper functions: 'ubifs_leb_read()', 'ubifs_leb_write()', 'ubifs_leb_change()', 'ubifs_leb_unmap()', 'ubifs_leb_map()', 'ubifs_is_mapped(). The idea is to wrap all UBI I/O functions in order to encapsulate various assertions and error path handling (error message, stack dump, switching to R/O mode). And there are some other benefits of this which will be used in the following patches. This patch does not switch whole UBIFS to use these functions yet. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: use correct flags in lpropsArtem Bityutskiy2011-07-041-4/+4
|/ | | | | | | | | | | | The UBIFS lpt tree is in many aspects similar to the TNC tree, and we have similar flags for these trees. And by mistake we use the COW_ZNODE flag for LPT in some places, instead of the right flag COW_CNODE. And this works only because these two constants have the same value. This patch makes all the LPT code to use COW_CNODE and also changes COW_CNODE constant value to make sure we do not misuse the flags any more. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: amend ubifs_recover_leb interfaceArtem Bityutskiy2011-06-011-1/+1
| | | | | | | | | | | Instead of passing "grouped" parameter to 'ubifs_recover_leb()' which tells whether the nodes are grouped in the LEB to recover, pass the journal head number and let 'ubifs_recover_leb()' look at the journal head's 'grouped' flag. This patch is a preparation to a further fix where we'll need to know the journal head number for other purposes. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: introduce a "grouped" journal head flagArtem Bityutskiy2011-06-011-0/+2
| | | | | | | | | | | Journal heads are different in a way how UBIFS writes nodes there. All normal journal heads receive grouped nodes, while the GC journal heads receives ungrouped nodes. This patch adds a 'grouped' flag to 'struct ubifs_jhead' which describes this property. This patch is a preparation to a further recovery fix. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* cifs/ubifs: Fix shrinker API change falloutAl Viro2011-05-291-1/+1
| | | | | | | | | Commit 1495f230fa77 ("vmscan: change shrinker API by passing shrink_control struct") changed the API of ->shrink(), but missed ubifs and cifs instances. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* UBIFS: add the fixup functionMatthew L. Creech2011-05-161-0/+1
| | | | | | | | | | | | This patch adds the 'ubifs_fixup_free_space()' function which scans all LEBs in the filesystem for those that are in-use but have one or more empty pages, then re-maps the LEBs in order to erase the empty portions. Afterward it removes the "space_fixup" flag from the UBIFS superblock. Artem: massaged the patch Signed-off-by: Matthew L. Creech <mlcreech@gmail.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: add a superblock flag for free space fix-upMatthew L. Creech2011-05-161-0/+2
| | | | | | | | | | | | | | | The 'space_fixup' flag can be set in the superblock of a new filesystem by mkfs.ubifs to indicate that any eraseblocks with free space remaining should be fixed-up the first time it's mounted (after which the flag is un-set). This means that the UBIFS image has been flashed by a "dumb" flasher and the free space has been actually programmed (writing all 0xFFs), so this free space cannot be used. UBIFS fixes the free space up by re-writing the contents of all LEBs with free space using the atomic LEB change UBI operation. Artem: improved commit message, add some more commentaries to the code. Signed-off-by: Matthew L. Creech <mlcreech@gmail.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: substitute the replay tree with a replay listArtem Bityutskiy2011-05-161-2/+0
| | | | | | | | | | | This patch simplifies replay even further - it removes the replay tree and adds the replay list instead. Indeed, we just do not need to use a tree here - all we need to do is to add all nodes to the list and then sort it. Using RB-tree is an overkill - more code and slower. And since we replay buds in order, we expect the nodes to follow in _mostly_ sorted order, so the merge sort becomes much cheaper in average than an RB-tree. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: introduce a separate structure for budgeting infoArtem Bityutskiy2011-05-131-35/+40
| | | | | | | | | | | | | This patch separates out all the budgeting-related information from 'struct ubifs_info' to 'struct ubifs_budg_info'. This way the code looks a bit cleaner. However, the main driver for this is that we want to save budgeting information and print it later, so a separate data structure for this is helpful. This patch is a preparation for the further debugging output improvements. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: fix minor stylistic issuesArtem Bityutskiy2011-05-131-3/+3
| | | | | | | | | Fix several minor stylistic issues: * lines longer than 80 characters * space before closing parenthesis ')' * spaces in the indentations Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: handle allocation failures in UBIFS write pathMatthew L. Creech2011-03-111-0/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Running kernel 2.6.37, my PPC-based device occasionally gets an order-2 allocation failure in UBIFS, which causes the root FS to become unwritable: kswapd0: page allocation failure. order:2, mode:0x4050 Call Trace: [c787dc30] [c00085b8] show_stack+0x7c/0x194 (unreliable) [c787dc70] [c0061aec] __alloc_pages_nodemask+0x4f0/0x57c [c787dd00] [c0061b98] __get_free_pages+0x20/0x50 [c787dd10] [c00e4f88] ubifs_jnl_write_data+0x54/0x200 [c787dd50] [c00e82d4] do_writepage+0x94/0x198 [c787dd90] [c00675e4] shrink_page_list+0x40c/0x77c [c787de40] [c0067de0] shrink_inactive_list+0x1e0/0x370 [c787de90] [c0068224] shrink_zone+0x2b4/0x2b8 [c787df00] [c0068854] kswapd+0x408/0x5d4 [c787dfb0] [c0037bcc] kthread+0x80/0x84 [c787dff0] [c000ef44] kernel_thread+0x4c/0x68 Similar problems were encountered last April by Tomasz Stanislawski: http://patchwork.ozlabs.org/patch/50965/ This patch implements Artem's suggested fix: fall back to a mutex-protected static buffer, allocated at mount time. I tested it by forcing execution down the failure path, and didn't see any ill effects. Artem: massaged the patch a little, improved it so that we'd not allocate the write reserve buffer when we are in R/O mode. Signed-off-by: Matthew L. Creech <mlcreech@gmail.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: introduce write-buffer size fieldArtem Bityutskiy2011-03-081-0/+2
| | | | | | | | | | | | | Currently we assume write-buffer size is always min_io_size. But this is about to change and write-buffers may be of variable size. Namely, they will be of max_write_size at the beginning, but will get smaller when we are approaching the end of LEB. This is a preparation patch which introduces 'size' field in the write-buffer structure which carries the current write-buffer size. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBI: incorporate LEB offset informationArtem Bityutskiy2011-03-081-0/+3
| | | | | | | | | Incorporate the LEB offset information into UBIFS. We'll use this information in one of the next patches to figure out what are the max. write size offsets relative to the PEB. So this patch is just a preparation. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: incorporate maximum write sizeArtem Bityutskiy2011-03-081-0/+5
| | | | | | | | | Incorporate maximum write size into the UBIFS description data structure. This patch just introduces new 'c->max_write_size' and 'c->max_write_shift' fields as a preparation for the following patches. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: introduce mounting flagArtem Bityutskiy2011-01-171-3/+2
| | | | | | | | | | | | | | | This is a preparational patch which removes the 'c->always_chk_crc' which was set during mounting and remounting to R/W mode and introduces 'c->mounting' flag which is set when mounting. Now the 'c->always_chk_crc' flag is the same as 'c->remounting_rw && c->mounting'. This patch is a preparation for the next one which will need to know when we are mounting and remounting to R/W mode, which is exactly what 'c->always_chk_crc' effectively is, but its name does not suite the next patch. The other possibility would be to just re-name it, but then we'd end up with less logical flags coverage. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: re-arrange variables in ubifs_infoArtem Bityutskiy2011-01-171-11/+11
| | | | | | | | | This is a cosmetic patch which re-arranges variables in 'struct ubifs_info' so that all boolean-like variables which are only changed during mounting or re-mounting to R/W mode are places together. Then they are turned into bit-fields, which makes the structure a little bit smaller. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: introduce new flags for RO mountsArtem Bityutskiy2010-09-191-4/+9
| | | | | | | | | | | | | | | | | | | | | | | | Commit 2fde99cb55fb9d9b88180512a5e8a5d939d27fec "UBIFS: mark VFS SB RO too" introduced regression. This commit made UBIFS set the 'MS_RDONLY' flag in the VFS superblock when it switches to R/O mode due to an error. This was done to make VFS show the R/O UBIFS flag in /proc/mounts. However, several places in UBIFS relied on the 'MS_RDONLY' flag and assume this flag can only change when we re-mount. For example, 'ubifs_put_super()'. This patch introduces new UBIFS flag - 'c->ro_mount' which changes only when we re-mount, and preserves the way UBIFS was originally mounted (R/W or R/O). This allows us to de-initialize UBIFS cleanly in 'ubifs_put_super()'. This patch also changes all 'ubifs_assert(!c->ro_media)' assertions to 'ubifs_assert(!c->ro_media && !c->ro_mount)', because we never should write anything if the FS was mounter R/O. All the places where we test for 'MS_RDONLY' flag in the VFS SB were changed and now we test the 'c->ro_mount' flag instead, because it preserves the original UBIFS mount type, unlike the 'MS_RDONLY' flag. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: introduce new flag for RO due to errorsArtem Bityutskiy2010-09-171-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The R/O state may have various reasons: 1. The UBI volume is R/O 2. The FS is mounted R/O 3. The FS switched to R/O mode because of an error However, in UBIFS we have only one variable which represents cases 1 and 3 - 'c->ro_media'. Indeed, we set this to 1 if we switch to R/O mode due to an error, and then we test it in many places to make sure that we stop writing as soon as the error happens. But this is very unclean. One consequence of this, for example, is that in 'ubifs_remount_fs()' we use 'c->ro_media' to check whether we are in R/O mode because on an error, and we print a message in this case. However, if we are in R/O mode because the media is R/O, our message is bogus. This patch introduces new flag - 'c->ro_error' which is set when we switch to R/O mode because of an error. It also changes all "if (c->ro_media)" checks to "if (c->ro_error)" checks, because this is what the checks actually mean. We do not need to check for 'c->ro_media' because if the UBI volume is in R/O mode, we do not allow R/W mounting, and now writes can happen. This is guaranteed by VFS. But it is good to double-check this, so this patch also adds many "ubifs_assert(!c->ro_media)" checks. In the 'ubifs_remount_fs()' function this patch makes a bit more changes - it fixes the error messages as well. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: mark unused key objects as invalidArtem Bityutskiy2010-08-301-1/+5
| | | | | | | | | | | | | | | When scanning the flash, UBIFS builds a list of flash nodes of type 'struct ubifs_scan_node'. Each scanned node has a 'snod->key' field. This field is valid for most of the nodes, but invalid for some node type, e.g., truncation nodes. It is safer to explicitly initialize such keys to something invalid, rather than leaving them initialized to all zeros, which has key type of UBIFS_INO_KEY. This patch introduces new "fake" key type UBIFS_INVALID_KEY and initializes unused 'snod->key' objects to this type. It also adds debugging assertions in the TNC code to make sure no one ever tries to look these nodes up in the TNC. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* check ATTR_SIZE contraints in inode_change_okChristoph Hellwig2010-08-091-1/+1
| | | | | | | | | | | | | | | | | | | | | Make sure we check the truncate constraints early on in ->setattr by adding those checks to inode_change_ok. Also clean up and document inode_change_ok to make this obvious. As a fallout we don't have to call inode_newsize_ok from simple_setsize and simplify it down to a truncate_setsize which doesn't return an error. This simplifies a lot of setattr implementations and means we use truncate_setsize almost everywhere. Get rid of fat_setsize now that it's trivial and mark ext2_setsize static to make the calling convention obvious. Keep the inode_newsize_ok in vmtruncate for now as all callers need an audit for its removal anyway. Note: setattr code in ecryptfs doesn't call inode_change_ok at all and needs a deeper audit, but that is left for later. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* mm: add context argument to shrinker callbackDave Chinner2010-07-191-1/+1
| | | | | | | | | | | | The current shrinker implementation requires the registered callback to have global state to work from. This makes it difficult to shrink caches that are not global (e.g. per-filesystem caches). Pass the shrinker structure to the callback so that users can embed the shrinker structure in the context the shrinker needs to operate on and get back to it in the callback via container_of(). Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
* kill spurious reference to vmtruncatenpiggin@suse.de2010-05-271-1/+1
| | | | | | | | | | Lots of filesystems calls vmtruncate despite not implementing the old ->truncate method. Switch them to use simple_setsize and add some comments about the truncate code where it seems fitting. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* drop unused dentry argument to ->fsyncChristoph Hellwig2010-05-271-1/+1
| | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* UBIFS: improve lprops dumpArtem Bityutskiy2009-09-151-0/+1
| | | | | | | Improve 'dbg_dump_lprop()' and print dark and dead space there, decode flags, and journal heads. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: define journal head numbers in ubifs-media.hArtem Bityutskiy2009-09-151-6/+4
| | | | | | | The journal head names and numbers are part of the UBIFS format, so they should be in the ubifs-media.h. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: do not print scary error messages needlesslyArtem Bityutskiy2009-09-101-1/+1
| | | | | | | | | | | | | | | | At the moment UBIFS print large and scary error messages and flash dumps in case of nearly any corruption, even if it is a recoverable corruption. For example, if the master node is corrupted, ubifs_scan() prints error dumps, then UBIFS recovers just fine and goes on. This patch makes UBIFS print scary error messages only in real cases, which are not recoverable. It adds 'quiet' argument to the 'ubifs_scan()' function, so the caller may ask 'ubi_scan()' not to print error messages if the caller is able to do recovery. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Reviewed-by: Adrian Hunter <Adrian.Hunter@nokia.com>
* UBIFS: minor spelling and grammar fixesAdrian Hunter2009-07-051-2/+2
| | | | Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
* UBIFS: set write-buffer timout to 3-5 secondsArtem Bityutskiy2009-07-051-2/+3
| | | | | | | This patch cleans up write-buffer timeout initialization and sets it to 3-5 interval. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: slightly optimize write-buffer timer usageArtem Bityutskiy2009-07-051-2/+4
| | | | | | | | | | | | | | | | | | | This patch adds the following minor optimization: 1. If write-buffer does not use the timer, indicate it with the wbuf->no_timer variable, instead of using the wbuf->softlimit variable. This is better because wbuf->softlimit is of ktime_t type, and the ktime_to_ns function contains 64-bit multiplication. 2. Do not call the 'hrtimer_cancel()' function for write-buffers which do not use timers. 3. Do not cancel the timer in 'ubifs_put_super()' because the synchronization function does this. This patch also removes a confusing comment. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: start using hrtimersArtem Bityutskiy2009-06-081-5/+8
| | | | | | | | | | | | | | | | | | | UBIFS uses timers for write-buffer write-back. It is not crucial for us to write-back exactly on time. We are fine to write-back a little earlier or later. And this means we may optimize UBIFS timer so that it could be groped with a close timer event, so that the CPU would not be waken up just to do the write back. This is optimization to lessen power consumption, which is important in embedded devices UBIFS is used for. hrtimers have a nice feature: they are effectively range timers, and we may defind the soft and hard limits for it. Standard timers do not have these feature. They may only be made deferrable, but this means there is effectively no hard limit. So, we will better use hrtimers. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: add R/O compatibilityArtem Bityutskiy2009-03-261-0/+4
| | | | | | | | | | | | | | Now UBIFS is supported by u-boot. If we ever decide to change the media format, then people will have to upgrade their u-boots to mount new format images. However, very often it is possible to preserve R/O forward-compatibility, even though the write forward-compatibility is not preserved. This patch introduces a new super-block field which stores the R/O compatibility version. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Acked-by: Adrian Hunter <Adrian.Hunter@nokia.com>
* UBIFS: introduce a helpful variableArtem Bityutskiy2009-03-161-2/+5
| | | | | | | | This patch introduces a helpful @c->idx_leb_size variable. The patch also fixes some spelling issues and makes comments use "LEB" instead of "eraseblock", which is more correct. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: improve find function interfaceArtem Bityutskiy2009-03-081-1/+1
| | | | | | | | Make 'ubifs_find_free_space()' return offset where free space starts, rather than the amount of free space. This is just more appropriat for its caller. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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