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* UBIFS: fix-up free space earlierBen Gardiner2011-06-031-8/+8
| | | | | | | | | | | | | | | | The free space fixup is currently initiated during mount after the call to ubifs_write_master() which results in a write to PEBs; this has been observed with the patch 'assert no fixup when writing a node' applied: Move the free space fixup on mount to before the calls to ubifs_recover_inl_heads() and ubifs_write_master(). This results in no assertions with the previously mentioned patch applied. Artem: tweaked the patch a bit Signed-off-by: Ben Gardiner <bengardiner@nanometrics> Reviewed-by: Matthew L. Creech <mlcreech@gmail.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: intialize LPT earlierBen Gardiner2011-06-031-13/+16
| | | | | | | | | | | | | | The current 'mount_ubifs()' implementation does not initialize the LPT until the the master node is marked dirty. Move the LPT initialization to before marking the master node dirty. This is a preparation for the next patch which will move the free-space-fixup check to before marking the master node dirty, because we have to fix-up the free space before doing any writes. Artem: massaged the patch and commit message. Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca> Reviewed-by: Matthew L. Creech <mlcreech@gmail.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: assert no fixup when writing a nodeBen Gardiner2011-06-031-0/+2
| | | | | | | | | | | | | | | The current free space fixup can result in some writing to the UBI volume when the space_fixup flag is set. To catch instances where UBIFS is writing to the NAND while the space_fixup flag is set, add an assert to ubifs_write_node(). Artem: tweaked the patch, added similar assertion to the write buffer write path. Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca> Reviewed-by: Matthew L. Creech <mlcreech@gmail.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: fix clean znode counter corruption in error casesArtem Bityutskiy2011-06-031-4/+5
| | | | | | | | | | | | | | | | UBIFS maintains per-filesystem and global clean znode counters ('c->clean_zn_cnt' and 'ubifs_clean_zn_cnt'). It is important to maintain correct values there since the shrinker relies on 'ubifs_clean_zn_cnt'. However, in case of failures during commit the counters were corrupted. E.g., if a failure happens in the middle of 'write_index()', then some nodes in the commit list ('c->cnext') are marked as clean, and some are marked as dirty. And the 'ubifs_destroy_tnc_subtree()' frees does not retrun correct count, and we end up with non-zero 'c->clean_zn_cnt' when unmounting. This means that if we have 2 file-sytem and one of them fails, and we unmount it, 'ubifs_clean_zn_cnt' stays incorrect and confuses the shrinker. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: fix memory leak on error pathArtem Bityutskiy2011-06-031-0/+1
| | | | | | | | | | UBIFS leaks memory on error path in 'ubifs_jnl_update()' in case of write failure because it forgets to free the 'struct ubifs_dent_node *dent' object. Although the object is small, the alignment can make it large - e.g., 2KiB if the min. I/O unit is 2KiB. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Cc: stable@kernel.org
* UBIFS: fix shrinker object count reportsArtem Bityutskiy2011-06-031-1/+5
| | | | | | | | | | | | | | Sometimes VM asks the shrinker to return amount of objects it can shrink, and we return the ubifs_clean_zn_cnt in that case. However, it is possible that this counter is negative for a short period of time, due to the way UBIFS TNC code updates it. And I can observe the following warnings sometimes: shrink_slab: ubifs_shrinker+0x0/0x2b7 [ubifs] negative objects to delete nr=-8541616642706119788 This patch makes sure UBIFS never returns negative count of objects. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Cc: stable@kernel.org
* UBIFS: fix recovery broken by the previous recovery fixArtem Bityutskiy2011-06-011-65/+87
| | | | | | | | | | | | | | | | Unfortunately, the recovery fix d1606a59b6be4ea392eabd40d1250aa1eeb19efb (UBIFS: fix extremely rare mount failure) broke recovery. This commit make UBIFS drop the last min. I/O unit in all journal heads, but this is needed only for the GC head. And this does not work for non-GC heads. For example, if suppose we have min. I/O units A and B, and A contains a valid node X, which was fsynced, and then a group of nodes Y which spans the rest of A and B. In this case we'll drop not only Y, but also X, which is obviously incorrect. This patch fixes the issue and additionally makes recovery to drop last min. I/O unit only for the GC head, and leave things as they have been for ages for the other heads - this is safer. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* UBIFS: amend ubifs_recover_leb interfaceArtem Bityutskiy2011-06-014-8/+9
| | | | | | | | | | | 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 Bityutskiy2011-06-012-1/+6
| | | | | | | | | | | 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>
* UBIFS: supress false error messagesArtem Bityutskiy2011-06-011-2/+2
| | | | | | | | | | | Commit ab51afe05273741f72383529ef488aa1ea598ec6 was a good clean-up, but it introduced a regression - now UBIFS prints scary error messages during recovery on all corrupted nodes, even though the corruptions are expected (due to a power cut). This patch fixes the issue. Additionally fix a typo in a commentary introduced by the same commit. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* cifs/ubifs: Fix shrinker API change falloutAl Viro2011-05-292-2/+3
| | | | | | | | | 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: remove unnecessary dentry_unhash from rmdir, dir renameSage Weil2011-05-281-5/+0
| | | | | | | | | | ubifs does not have problems with references to unlinked directories. CC: Artem Bityutskiy <dedekind1@gmail.com> CC: Adrian Hunter <adrian.hunter@nokia.com> CC: linux-mtd@lists.infradead.org Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* fs: pass exact type of data dirties to ->dirty_inodeChristoph Hellwig2011-05-271-1/+1
| | | | | | | | | | | | | | | | | Tell the filesystem if we just updated timestamp (I_DIRTY_SYNC) or anything else, so that the filesystem can track internally if it needs to push out a transaction for fdatasync or not. This is just the prototype change with no user for it yet. I plan to push large XFS changes for the next merge window, and getting this trivial infrastructure in this window would help a lot to avoid tree interdependencies. Also remove incorrect comments that ->dirty_inode can't block. That has been changed a long time ago, and many implementations rely on it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'for-linus' of ↵Linus Torvalds2011-05-261-0/+5
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: (25 commits) cifs: remove unnecessary dentry_unhash on rmdir/rename_dir ocfs2: remove unnecessary dentry_unhash on rmdir/rename_dir exofs: remove unnecessary dentry_unhash on rmdir/rename_dir nfs: remove unnecessary dentry_unhash on rmdir/rename_dir ext2: remove unnecessary dentry_unhash on rmdir/rename_dir ext3: remove unnecessary dentry_unhash on rmdir/rename_dir ext4: remove unnecessary dentry_unhash on rmdir/rename_dir btrfs: remove unnecessary dentry_unhash in rmdir/rename_dir ceph: remove unnecessary dentry_unhash calls vfs: clean up vfs_rename_other vfs: clean up vfs_rename_dir vfs: clean up vfs_rmdir vfs: fix vfs_rename_dir for FS_RENAME_DOES_D_MOVE filesystems libfs: drop unneeded dentry_unhash vfs: update dentry_unhash() comment vfs: push dentry_unhash on rename_dir into file systems vfs: push dentry_unhash on rmdir into file systems vfs: remove dget() from dentry_unhash() vfs: dentry_unhash immediately prior to rmdir vfs: Block mmapped writes while the fs is frozen ...
| * vfs: push dentry_unhash on rename_dir into file systemsSage Weil2011-05-261-0/+3
| | | | | | | | | | | | | | | | | | | | Only a few file systems need this. Start by pushing it down into each rename method (except gfs2 and xfs) so that it can be dealt with on a per-fs basis. Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * vfs: push dentry_unhash on rmdir into file systemsSage Weil2011-05-261-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | Only a few file systems need this. Start by pushing it down into each fs rmdir method (except gfs2 and xfs) so it can be dealt with on a per-fs basis. This does not change behavior for any in-tree file systems. Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | UBIFS: switch to dynamic printksArtem Bityutskiy2011-05-232-94/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Switch to debugging using dynamic printk (pr_debug()). There is no good reason to carry custom debugging prints if there is so cool and powerful generic dynamic printk infrastructure, see Documentation/dynamic-debug-howto.txt. With dynamic printks we can switch on/of individual prints, per-file, per-function and per format messages. This means that instead of doing old-fashioned echo 1 > /sys/module/ubifs/parameters/debug_msgs to enable general messages, we can do: echo 'format "UBIFS DBG gen" +ptlf' > control to enable general messages and additionally ask the dynamic printk infrastructure to print process ID, line number and function name. So there is no reason to keep UBIFS-specific crud if there is more powerful generic thing. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: fix kernel-doc commentsArtem Bityutskiy2011-05-201-5/+5
| | | | | | | | | | | | | | This is a minor fix for UBIFS kernel-doc comments - we forgot the "@" symbol for several 'struct ubifs_debug_info'. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: fix extremely rare mount failureArtem Bityutskiy2011-05-161-10/+72
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes an extremely rare mount failure after a power cut, when mount fails with ENOSPC error because UBIFS could not find the GC LEB. In short, the reason for this failure is that after recovery the GC head LEB contains less free space than it had contained just before the power cut happened. As a result, if the FS is full, 'ubifs_rcvry_gc_commit()' is unable to find a dirty LEB to GC and a free LEB, so mount fails. This patch contains a huge comment with more detailed explanation, please refer that comment. Since this is really really rare and unlikely situation, I do not send this patch to the stable tree, also because it requires a lot of preparation patches which I did before. So sending this to -stable would be too risky. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: simplify LEB recovery function furtherArtem Bityutskiy2011-05-161-13/+4
| | | | | | | | | | | | | | | | | | Further simplify 'ubifs_recover_leb()' by noticing that we have to call 'clean_buf()' in any case, and it is fine to call it if the offset is aligned to 'c->min_io_size'. Thus, we do not have to call it separately from every "if" - just call it once at the end. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: always cleanup the recovered LEBArtem Bityutskiy2011-05-161-20/+9
| | | | | | | | | | | | | | | | | | | | Now when we call 'ubifs_recover_leb()' only for LEBs which are potentially corrupted (i.e., only for last buds, not for all of them), we can cleanup every LEB, not only those where we find corruption. The reason - unstable bits. Even though the LEB may look good now, it might contain unstable bits which may hit us a bit later. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: clean up LEB recovery functionArtem Bityutskiy2011-05-161-56/+28
| | | | | | | | | | | | | | | | This patch cleans up 'ubifs_recover_leb()' function and makes it more readable. Move things which are done only once out of the loop and kill unneeded 'switch' statement. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: fix-up free space on mount if flag is setMatthew L. Creech2011-05-161-0/+13
| | | | | | | | | | | | | | | | | | | | | | If a UBIFS filesystem is being mounted read-write, or is being remounted from read-only to read-write, check for the "space_fixup" flag and fix all LEBs containing empty space if necessary. Artem: tweaked the patch a bit Signed-off-by: Matthew L. Creech <mlcreech@gmail.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: add the fixup functionMatthew L. Creech2011-05-162-0/+150
| | | | | | | | | | | | | | | | | | | | | | | | 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. Creech2011-05-164-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: share the next_log_lnum helperArtem Bityutskiy2011-05-162-21/+24
| | | | | | | | | | | | | | | | We'll need to use the 'next_log_lnum()' helper function from log.c in the fixup code, so let's move it to misc.h. IOW, this is a preparation to the following free space fixup changes. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: expect corruption only in last journal head LEBsArtem Bityutskiy2011-05-161-4/+71
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch improves UBIFS recovery and teaches it to expect corruption only in the last buds. Indeed, currently we just recover all buds, which is incorrect because only the last buds can have corruptions in case of a power cut. So it is inconsistent with the rest of the recovery strategy which tries hard to distinguish between corruptions cause by power cuts and other types of corruptions. This patch also adds one quirk - a bit older UBIFS was could have corruption in the next to last bud because of the way it switched buds: when bud A is full, it first searched for the next bud B, the wrote a reference node to the log about B, and then synchronized the write-buffer of A. So we could end up with buds A and B, where B is the last, but A had corruption. The UBIFS behavior was fixed, though, so currently it always first synchronizes A's write-buffer and only after this adds B to the log. However, to be make sure that we handle unclean (after a power cut) UBIFS images belonging to older UBIFS - we need to add a quirk and keep it for some time: we need to check for the situation described above. Thankfully, it is easy to check for that situation. When UBIFS adds B to the log, it always first unmaps B, then maps it, and then syncs A's write-buffer. Thus, in that situation we can check that B is empty, in which case it is OK to have corruption in A. To check that B is empty it is enough to just read the first few bytes of the bud and compare them with 0xFFs. This quirk may be removed in a couple of years. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: synchronize write-buffer before switching to the next budArtem Bityutskiy2011-05-163-19/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently when UBIFS fills up the current bud (which is the last in the journal head) and switches to the next bud, it first writes the log reference node for the next bud and only after this synchronizes the write-buffer of the previous bud. This is not a big deal, but an unclean power cut may lead to a situation when we have corruption in a next-to-last bud, although it is much more logical that we have to have corruption only in the last bud. This patch also removes write-buffer synchronization from 'ubifs_wbuf_seek_nolock()' because this is not needed anymore (we synchronize the write-buffer explicitly everywhere now) and also because this is just prone to various errors. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: remove BUG statementArtem Bityutskiy2011-05-161-5/+1
| | | | | | | | | | | | | | Remove a 'BUG()' statement when we are unable to find a bud and add a similar 'ubifs_assert()' statement instead. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: change bud replay function conventionsArtem Bityutskiy2011-05-161-16/+12
| | | | | | | | | | | | | | | | | | This is a minor preparation patch which changes 'replay_bud()' interface - instead of passing bud lnum, offs, jhead, etc directly, pass a pointer to the bud entry which contains all the information. The bud entry will be also needed in one of the following patches. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: substitute the replay tree with a replay listArtem Bityutskiy2011-05-162-100/+74
| | | | | | | | | | | | | | | | | | | | | | 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: simplify replayArtem Bityutskiy2011-05-161-108/+59
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch simplifies the replay code and makes it smaller. First of all, we can notice that we do not really need to create bud replay entries and insert them to the replay tree, because the only reason we do this is to set buds lprops correctly at the end. Instead, we can just walk the list of buds at the very end and set lprops for each bud. This allows us to get rid of whole 'insert_ref_node()' function, the 'REPLAY_REF' flag, and several fields in 'struct replay_entry'. Then we can also notice that we do not need the 'flags' 'struct replay_entry' field, because there is only one flag - 'REPLAY_DELETION'. Instead, we can just add a 'deletion' bit fields. As a result, this patch deletes much more lines that in adds. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: store free and dirty space in the bud replay entryArtem Bityutskiy2011-05-161-2/+6
| | | | | | | | | | | | | | This is just a small preparation patch which adds 'free' and 'drity' fields to 'struct bud_entry'. They will be used to set bud lprops. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: remove unnecessary stack variableArtem Bityutskiy2011-05-161-9/+8
| | | | | | | | | | | | | | | | | | This is patch removes an unnecessary 'offs' variable from 'ubifs_wbuf_write_nolock()' - we can just keep 'wbuf->offs' up-to-date instead. This patch is very minor the only motivation for it was that it is cleaner to keep wbuf->offs up-to-date by the time we call 'ubifs_leb_write()'. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: double check that buds are replied in orderArtem Bityutskiy2011-05-161-0/+4
| | | | | | | | | | | | | | | | | | | | | | Commit 52c6e6f990669deac3f370f1603815adb55a1dbd provides misleading infomation in the commit messages - buds are replied in order. And the real reason why that fix helped is probably because it made sure we seek head even in read-only mode (so deferred recovery will have seeked heads). This patch adds an assertion which will fire if we reply buds out of order. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: make 2 functions staticArtem Bityutskiy2011-05-161-2/+3
| | | | | | | | | | | | | | | | This is a minor change which makes 2 functions static because they are not used outside the gc.c file: 'data_nodes_cmp()' and 'nondata_nodes_cmp()'. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: improve commentaryArtem Bityutskiy2011-05-161-4/+5
| | | | | | | | | | | | This is a tiny clean-up patch which improves replay commentaries. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: improve debugging messagesArtem Bityutskiy2011-05-162-5/+5
| | | | | | | | | | | | Print a bit more information is some recovery and replay paths. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: dump more in the lprops debugging checkArtem Bityutskiy2011-05-161-0/+4
| | | | | | | | Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: simplify lprops debugging checkArtem Bityutskiy2011-05-161-33/+15
| | | | | | | | | | | | | | Now we return all errors from 'scan_check_cb()' directly, so we do not need 'struct scan_check_data' any more, and this patch removes it. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: simplify error path in lprops debugging checkArtem Bityutskiy2011-05-161-15/+10
| | | | | | | | | | | | | | Simplify error path in 'scan_check_cb()' and stop using the special 'data->err' field, but instead return the error code directly. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: improve debugging lprops scanning a littleArtem Bityutskiy2011-05-161-24/+18
| | | | | | | | | | | | | | | | | | When doing the lprops extra check ('dbg_check_lprops()') we scan whole media. We even scan empty and freeable LEBs which may contain garbage, which we handle after scanning. This patch teach the lprops checking function ('scan_check_cb()') to avoid scanning for free and freeable LEBs and save time. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: fix a rare memory leak in ro to rw remounting pathArtem Bityutskiy2011-05-132-1/+3
| | | | | | | | | | | | | | | | | | | | When re-mounting from R/O mode to R/W mode and the LEB count in the superblock is not up-to date, because for the underlying UBI volume became larger, we re-write the superblock. We allocate RAM for these purposes, but never free it. So this is a memory leak, although very rare one. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Cc: stable@kernel.org
* | UBIFS: fix inode size debugging check failureArtem Bityutskiy2011-05-131-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes a problem with the following symptoms: UBIFS: deferred recovery completed UBIFS error (pid 15676): dbg_check_synced_i_size: ui_size is 11481088, synced_i_size is 11459081, but inode is clean UBIFS error (pid 15676): dbg_check_synced_i_size: i_ino 128, i_mode 0x81a4, i_size 11481088 It happens when additional debugging checks are enabled and we are recovering from a power cut. When we fixup corrupted inode size during recovery, we change them in-place and we change ui_size as well, but not synced_i_size, which causes this failure. This patch makes sure we change both fields and fixes the issue. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: fix debugging FS checking failureArtem Bityutskiy2011-05-131-6/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the debugging self-checks are enabled, we go trough whole file-system after mount and check/validate every single node referred to by the index. This is implemented by the 'dbg_check_filesystem()' function. However, this function fails if we mount "unclean" file-system, i.e., if we mount the file-system after a power cut. It fails with the following symptoms: UBIFS DBG (pid 8171): ubifs_recover_size: ino 937 size 3309925 -> 3317760 UBIFS: recovery deferred UBIFS error (pid 8171): check_leaf: data node at LEB 1000:0 is not within inode size 3309925 The reason of failure is that recovery fixed up the inode size in memory, but not on the flash so far. So the value on the flash is incorrect so far, and would be corrected when we re-mount R/W. But 'check_leaf()' ignores this fact and tries to validate the size of the on-flash inode, which is incorrect, so it fails. This patch teaches the checking code to look at the VFS inode cache first, and if there is the inode in question, use that inode instead of the inode on the flash media. This fixes the issue. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: remove an unneeded checkArtem Bityutskiy2011-05-131-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | In 'ubifs_recover_size()' we have an "if (!e->inode && c->ro_mount)" statement. But if 'c->ro_mount' is true, then '!e->inode' must always be true as well. So we can remove the unnecessary '!e->inode' test and put an 'ubifs_assert(!e->inode)' instead. This patch also removes an extra trailing white-space in a debugging print, as well as adds few empty lines to 'ubifs_recover_size()' to make it a bit more readable. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: fix debugging messageArtem Bityutskiy2011-05-131-1/+1
| | | | | | | | | | | | | | When recovering the inode size, one of the debugging messages was printed incorrecly, this patches fixes it. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: refactor ubifs_rcvry_gc_commitArtem Bityutskiy2011-05-131-37/+18
| | | | | | | | | | | | | | This commits refactors and cleans up 'ubifs_rcvry_gc_commit()' which was quite untidy, also removes the commentary which was not 100% correct. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: split ubifs_rcvry_gc_commitArtem Bityutskiy2011-05-131-27/+50
| | | | | | | | | | | | | | | | | | | | | | Split the 'ubifs_rcvry_gc_commit()' function and introduce a 'grab_empty_leb()' heler. This cleans 'ubifs_rcvry_gc_commit()' a little and makes it a bit less of spagetti. Also, add a commentary which explains why it is crucial to first search for an empty LEB and then run commit. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* | UBIFS: dump the stack on errors in failure mode tooArtem Bityutskiy2011-05-131-4/+1
| | | | | | | | | | | | | | | | | | | | | | | | When UBIFS is in the failure mode (used for power cut emulation testing) we for some reasons do not dump the stack in many places, e.g., in assertions. Probably at early days we had too many of them and disabled this to make the development easier, but then never enabled. Nowadays I sometimes observe assertion failures during power cut testing, but the useful stackdump is not printed, which is bad. This patch makes UBIFS always print the stackdump when debugging is enabled. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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