summaryrefslogtreecommitdiffstats
path: root/fs/jbd2
Commit message (Collapse)AuthorAgeFilesLines
* ext4: Fix async commit mode to be safe by using a barrierTheodore Ts'o2009-09-111-4/+7
| | | | | | | | | | | | | | | | | | | | | | | | | Previously the journal_async_commit mount option was equivalent to using barrier=0 (and just as unsafe). This patch fixes it so that we eliminate the barrier before the commit block (by not using ordered mode), and explicitly issuing an empty barrier bio after writing the commit block. Because of the journal checksum, it is safe to do this; if the journal blocks are not all written before a power failure, the checksum in the commit block will prevent the last transaction from being replayed. Using the fs_mark benchmark, using journal_async_commit shows a 50% improvement: FSUse% Count Size Files/sec App Overhead 8 1000 10240 30.5 28242 vs. FSUse% Count Size Files/sec App Overhead 8 1000 10240 45.8 28620 Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* jbd2: Annotate transaction start also for jbd2_journal_restart()Jan Kara2009-08-181-2/+3
| | | | | | | | | | lockdep annotation for a transaction start has been at the end of jbd2_journal_start(). But a transaction is also started from jbd2_journal_restart(). Move the lockdep annotation to start_this_handle() which covers both cases. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* jbd2: round commit timer up to avoid uncommitted transactionAndreas Dilger2009-08-111-1/+1
| | | | | | | | | | | fix jiffie rounding in jbd commit timer setup code. Rounding down could cause the timer to be fired before the corresponding transaction has expired. That transaction can stay not committed forever if no new transaction is created or expicit sync/umount happens. Signed-off-by: Alex Zhuravlev (Tomas) <alex.zhuravlev@sun.com> Signed-off-by: Andreas Dilger <adilger@sun.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* jbd2: Fail to load a journal if it is too shortJan Kara2009-07-171-0/+6
| | | | | | | | Due to on disk corruption, it can happen that journal is too short. Fail to load it in such case so that we don't oops somewhere later. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* writeback: get rid of wbc->for_writepagesJens Axboe2009-09-161-1/+0Star
| | | | | | | It's only set, it's never checked. Kill it. Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* jbd2: fix race between write_metadata_buffer and get_write_accessdingdinghua2009-07-131-9/+11
| | | | | | | | | | | | | | The function jbd2_journal_write_metadata_buffer() calls jbd_unlock_bh_state(bh_in) too early; this could potentially allow another thread to call get_write_access on the buffer head, modify the data, and dirty it, and allowing the wrong data to be written into the journal. Fortunately, if we lose this race, the only time this will actually cause filesystem corruption is if there is a system crash or other unclean shutdown of the system before the next commit can take place. Signed-off-by: dingdinghua <dingdinghua85@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* jbd2: Fix a race between checkpointing code and journal_get_write_access()Jan Kara2009-07-131-33/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following race can happen: CPU1 CPU2 checkpointing code checks the buffer, adds it to an array for writeback do_get_write_access() ... lock_buffer() unlock_buffer() flush_batch() submits the buffer for IO __jbd2_journal_file_buffer() So a buffer under writeout is returned from do_get_write_access(). Since the filesystem code relies on the fact that journaled buffers cannot be written out, it does not take the buffer lock and so it can modify buffer while it is under writeout. That can lead to a filesystem corruption if we crash at the right moment. We fix the problem by clearing the buffer dirty bit under buffer_lock even if the buffer is on BJ_None list. Actually, we clear the dirty bit regardless the list the buffer is in and warn about the fact if the buffer is already journalled. Thanks for spotting the problem goes to dingdinghua <dingdinghua85@gmail.com>. Reported-by: dingdinghua <dingdinghua85@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* jbd2: Remove GFP_ATOMIC kmalloc from inside spinlock critical regionTheodore Ts'o2009-06-211-5/+6
| | | | | | | Fix jbd2_dev_to_name(), a function used when pretty-printting jbd2 and ext4 tracepoints. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* jbd2: clean up jbd2_journal_try_to_free_buffers()Hisashi Hifumi2009-06-181-49/+0Star
| | | | | | | | | | | | | This patch reverts 3f31fddf, which is no longer needed because if a race between freeing buffer and committing transaction functionality occurs and dio gets error, currently dio falls back to buffered IO due to the commit 6ccfa806. Signed-off-by: Hisashi Hifumi <hifumi.hisashi@oss.ntt.co.jp> Cc: Mingming Cao <cmm@us.ibm.com> Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* jbd2: convert instrumentation from markers to tracepointsTheodore Ts'o2009-06-173-9/+78
| | | | Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* jbd2: Fix minor typos in comments in fs/jbd2/journal.cAlberto Bertogli2009-06-091-4/+4
| | | | | | Signed-off-by: Alberto Bertogli <albertito@blitiri.com.ar> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* jbd2: use SWRITE_SYNC_PLUG when writing synchronous revoke recordsTheodore Ts'o2009-04-142-10/+14
| | | | | | | | | The revoke records must be written using the same way as the rest of the blocks during the commit process; that is, either marked as synchronous writes or as asynchornous writes. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* jbd2: use WRITE_SYNC_PLUG instead of WRITE_SYNCJens Axboe2009-04-061-4/+9
| | | | | | | | | | | When you are going to be submitting several sync writes, we want to give the IO scheduler a chance to merge some of them. Instead of using the implicitly unplugging WRITE_SYNC variant, use WRITE_SYNC_PLUG and rely on sync_buffer() doing the unplug when someone does a wait_on_buffer()/lock_buffer(). Signed-off-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* jbd2: Update locking comentsJan Kara2009-03-271-5/+19
| | | | | | | | | Update information about locking in JBD2 revoke code. Inconsistency in comments found by Lin Tan <tammy000@gmail.com>. CC: Lin Tan <tammy000@gmail.com>. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: Use WRITE_SYNC for commits which are caused by fsync()Theodore Ts'o2009-03-262-1/+6
| | | | | | | | If a commit is triggered by fsync(), set a flag indicating the journal blocks associated with the transaction should be flushed out using WRITE_SYNC. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* jbd2: Avoid possible NULL dereference in jbd2_journal_begin_ordered_truncate()Jan Kara2009-02-101-11/+31
| | | | | | | | | | | | | | | | | | | | | If we race with commit code setting i_transaction to NULL, we could possibly dereference it. Proper locking requires the journal pointer (to access journal->j_list_lock), which we don't have. So we have to change the prototype of the function so that filesystem passes us the journal pointer. Also add a more detailed comment about why the function jbd2_journal_begin_ordered_truncate() does what it does and how it should be used. Thanks to Dan Carpenter <error27@gmail.com> for pointing to the suspitious code. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Acked-by: Joel Becker <joel.becker@oracle.com> CC: linux-ext4@vger.kernel.org CC: ocfs2-devel@oss.oracle.com CC: mfasheh@suse.de CC: Dan Carpenter <error27@gmail.com>
* jbd2: Fix return value of jbd2_journal_start_commit()Jan Kara2009-02-101-6/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The function jbd2_journal_start_commit() returns 1 if either a transaction is committing or the function has queued a transaction commit. But it returns 0 if we raced with somebody queueing the transaction commit as well. This resulted in ext4_sync_fs() not functioning correctly (description from Arthur Jones): In the case of a data=ordered umount with pending long symlinks which are delayed due to a long list of other I/O on the backing block device, this causes the buffer associated with the long symlinks to not be moved to the inode dirty list in the second phase of fsync_super. Then, before they can be dirtied again, kjournald exits, seeing the UMOUNT flag and the dirty pages are never written to the backing block device, causing long symlink corruption and exposing new or previously freed block data to userspace. This can be reproduced with a script created by Eric Sandeen <sandeen@redhat.com>: #!/bin/bash umount /mnt/test2 mount /dev/sdb4 /mnt/test2 rm -f /mnt/test2/* dd if=/dev/zero of=/mnt/test2/bigfile bs=1M count=512 touch /mnt/test2/thisisveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryverylongfilename ln -s /mnt/test2/thisisveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryverylongfilename /mnt/test2/link umount /mnt/test2 mount /dev/sdb4 /mnt/test2 ls /mnt/test2/ This patch fixes jbd2_journal_start_commit() to always return 1 when there's a transaction committing or queued for commit. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> CC: Eric Sandeen <sandeen@redhat.com> CC: linux-ext4@vger.kernel.org
* ext4: fix wrong use of do_divSimon Holm Thøgersen2009-01-121-3/+3
| | | | | | | | | | | | | | | | | | the following warning: fs/jbd2/journal.c: In function ‘jbd2_seq_info_show’: fs/jbd2/journal.c:850: warning: format ‘%lu’ expects type ‘long unsigned int’, but argument 3 has type ‘uint32_t’ is caused by wrong usage of do_div that modifies the dividend in-place and returns the quotient. So not only would an incorrect value be displayed, but s->journal->j_average_commit_time would also be changed to a wrong value! Fix it by using div_u64 instead. Signed-off-by: Simon Holm Thøgersen <odie@cs.aau.dk> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* Merge branch 'for_linus' of ↵Linus Torvalds2009-01-094-124/+142
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (57 commits) jbd2: Fix oops in jbd2_journal_init_inode() on corrupted fs ext4: Remove "extents" mount option block: Add Kconfig help which notes that ext4 needs CONFIG_LBD ext4: Make printk's consistently prefixed with "EXT4-fs: " ext4: Add sanity checks for the superblock before mounting the filesystem ext4: Add mount option to set kjournald's I/O priority jbd2: Submit writes to the journal using WRITE_SYNC jbd2: Add pid and journal device name to the "kjournald2 starting" message ext4: Add markers for better debuggability ext4: Remove code to create the journal inode ext4: provide function to release metadata pages under memory pressure ext3: provide function to release metadata pages under memory pressure add releasepage hooks to block devices which can be used by file systems ext4: Fix s_dirty_blocks_counter if block allocation failed with nodelalloc ext4: Init the complete page while building buddy cache ext4: Don't allow new groups to be added during block allocation ext4: mark the blocks/inode bitmap beyond end of group as used ext4: Use new buffer_head flag to check uninit group bitmaps initialization ext4: Fix the race between read_inode_bitmap() and ext4_new_inode() ext4: code cleanup ...
| * jbd2: Fix oops in jbd2_journal_init_inode() on corrupted fsJan Kara2009-01-061-13/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On 32-bit system with CONFIG_LBD getblk can fail because provided block number is too big. Add error checks so we fail gracefully if getblk() returns NULL (which can also happen on memory allocation failures). Thanks to David Maciejak from Fortinet's FortiGuard Global Security Research Team for reporting this bug. http://bugzilla.kernel.org/show_bug.cgi?id=12370 Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> cc: stable@kernel.org
| * jbd2: Submit writes to the journal using WRITE_SYNCTheodore Ts'o2009-01-051-2/+2
| | | | | | | | | | | | | | | | Since we will be waiting the write of the commit record to the journal to complete in journal_submit_commit_record(), submit it using WRITE_SYNC. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * jbd2: Add pid and journal device name to the "kjournald2 starting" messageTheodore Ts'o2009-01-041-2/+3
| | | | | | | | Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * ext4: Remove code to create the journal inodeTheodore Ts'o2009-01-061-72/+0Star
| | | | | | | | | | | | | | | | This code has been obsolete in quite some time, since the supported method for adding a journal inode is to use tune2fs (or to creating new filesystem with a journal via mke2fs or mkfs.ext4). Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * jbd2: Call journal commit callback without holding j_list_lockAneesh Kumar K.V2008-11-062-6/+9
| | | | | | | | | | | | | | | | | | Avoid freeing the transaction in __jbd2_journal_drop_transaction() so the journal commit callback can run without holding j_list_lock, to avoid lock contention on this spinlock. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * jbd2: Remove a large array of bh's from the stack of the checkpoint routineTheodore Ts'o2008-11-052-13/+11Star
| | | | | | | | | | | | | | | | jbd2_log_do_checkpoint()n is one of the kernel's largest stack users. Move the array of buffer head's from the stack of jbd2_log_do_checkpoint() to the in-core journal structure. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * ext4: add fsync batch tuning knobsTheodore Ts'o2009-01-042-1/+5
| | | | | | | | | | | | | | | | Add new mount options, min_batch_time and max_batch_time, which controls how long the jbd2 layer should wait for additional filesystem operations to get batched with a synchronous write transaction. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * ext4: display average commit timeTheodore Ts'o2008-12-171-0/+3
| | | | | | | | | | | | | | | | Display the average commit time (which is used by the ext4 fsync batching patch) in /proc/fs/jbd2/*/info for performance tuning purposes. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * jbd2: improve jbd2 fsync batchingJosef Bacik2008-11-262-14/+58
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the static sleep time in favor of a more self optimizing approach where we measure the average amount of time it takes to commit a transaction to disk and the ammount of time a transaction has been running. If somebody does a sync write or an fsync() traditionally we would sleep for 1 jiffies, which depending on the value of HZ could be a significant amount of time compared to how long it takes to commit a transaction to the underlying storage. With this patch instead of sleeping for a jiffie, we check to see if the amount of time this transaction has been running is less than the average commit time, and if it is we sleep for the delta using schedule_hrtimeout to give us a higher precision sleep time. This greatly benefits high end storage where you could end up sleeping for longer than it takes to commit the transaction and therefore sitting idle instead of allowing the transaction to be committed by keeping the sleep time to a minimum so you are sure to always be doing something. Signed-off-by: Josef Bacik <jbacik@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * jbd2: Add barrier not supported test to journal_wait_on_commit_recordTheodore Ts'o2009-01-061-2/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Xen doesn't report that barriers are not supported until buffer I/O is reported as completed, instead of when the buffer I/O is submitted. Add a check and a fallback codepath to journal_wait_on_commit_record() to detect this case, so that attempts to mount ext4 filesystems on LVM/devicemapper devices on Xen guests don't blow up with an "Aborting journal on device XXX"; "Remounting filesystem read-only" error. Thanks to Andreas Sundstrom for reporting this issue. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@kernel.org
* | jbd2: Add buffer triggersJoel Becker2009-01-053-0/+75
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Filesystems often to do compute intensive operation on some metadata. If this operation is repeated many times, it can be very expensive. It would be much nicer if the operation could be performed once before a buffer goes to disk. This adds triggers to jbd2 buffer heads. Just before writing a metadata buffer to the journal, jbd2 will optionally call a commit trigger associated with the buffer. If the journal is aborted, an abort trigger will be called on any dirty buffers as they are dropped from pending transactions. ocfs2 will use this feature. Initially I tried to come up with a more generic trigger that could be used for non-buffer-related events like transaction completion. It doesn't tie nicely, because the information a buffer trigger needs (specific to a journal_head) isn't the same as what a transaction trigger needs (specific to a tranaction_t or perhaps journal_t). So I implemented a buffer set, with the understanding that journal/transaction wide triggers should be implemented separately. There is only one trigger set allowed per buffer. I can't think of any reason to attach more than one set. Contrast this with a journal or transaction in which multiple places may want to watch the entire transaction separately. The trigger sets are considered static allocation from the jbd2 perspective. ocfs2 will just have one trigger set per block type, setting the same set on every bh of the same type. Signed-off-by: Joel Becker <joel.becker@oracle.com> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* jbd2: deregister proc on failure in jbd2_journal_init_inodeSami Liedes2008-11-031-0/+2
| | | | | | | | | | | | jbd2_journal_init_inode() does not call jbd2_stats_proc_exit() on all failure paths after calling jbd2_stats_proc_init(). This leaves dangling references to the fs in proc. This patch fixes a bug reported by Sami Leides at: http://bugzilla.kernel.org/show_bug.cgi?id=11493 Signed-off-by: Sami Liedes <sliedes@cc.hut.fi> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* jbd2: don't give up looking for space so easily in __jbd2_log_wait_for_spaceTheodore Ts'o2008-11-071-7/+25
| | | | | | | | | | | | | | | | | | | | | | Commit 23f8b79e introducd a regression because it assumed that if there were no transactions ready to be checkpointed, that no progress could be made on making space available in the journal, and so the journal should be aborted. This assumption is false; it could be the case that simply calling jbd2_cleanup_journal_tail() will recover the necessary space, or, for small journals, the currently committing transaction could be responsible for chewing up the required space in the log, so we need to wait for the currently committing transaction to finish before trying to force a checkpoint operation. This patch fixes a bug reported by Mihai Harpau at: https://bugzilla.redhat.com/show_bug.cgi?id=469582 This patch fixes a bug reported by François Valenduc at: http://bugzilla.kernel.org/show_bug.cgi?id=11840 Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: Duane Griffin <duaneg@dghda.com> Cc: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com>
* jbd2: Call the commit callback before the transaction could get droppedTheodore Ts'o2008-10-291-4/+4
| | | | | | | | | | | | | | | The transaction can potentially get dropped if there are no buffers that need to be written. Make sure we call the commit callback before potentially deciding to drop the transaction. Also avoid dereferencing the commit_transaction pointer in the marker for the same reason. This patch fixes the bug reported by Eric Paris at: http://bugzilla.kernel.org/show_bug.cgi?id=11838 Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Acked-by: Eric Sandeen <sandeen@redhat.com> Tested-by: Eric Paris <eparis@redhat.com>
* fs/Kconfig: move ext2, ext3, ext4, JBD, JBD2 outAlexey Dobriyan2008-10-201-0/+33
| | | | | | | | Use fs/*/Kconfig more, which is good because everything related to one filesystem is in one place and fs/Kconfig is quite fat. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ext4: Replace hackish ext4_mb_poll_new_transaction with commit callbackTheodore Ts'o2008-10-172-0/+4
| | | | | | | | | | | The multiblock allocator needs to be able to release blocks (and issue a blkdev discard request) when the transaction which freed those blocks is committed. Previously this was done via a polling mechanism when blocks are allocated or freed. A much better way of doing things is to create a jbd2 callback function and attaching the list of blocks to be freed directly to the transaction structure. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: add an option to control error handling on file dataHidehiro Kawai2008-10-111-0/+2
| | | | | | | | | | | | | | | | | | | | | | | If the journal doesn't abort when it gets an IO error in file data blocks, the file data corruption will spread silently. Because most of applications and commands do buffered writes without fsync(), they don't notice the IO error. It's scary for mission critical systems. On the other hand, if the journal aborts whenever it gets an IO error in file data blocks, the system will easily become inoperable. So this patch introduces a filesystem option to determine whether it aborts the journal or just call printk() when it gets an IO error in file data. If you mount an ext4 fs with data_err=abort option, it aborts on file data write error. If you mount it with data_err=ignore, it doesn't abort, just call printk(). data_err=ignore is the default. Here is the corresponding patch of the ext3 version: http://kerneltrap.org/mailarchive/linux-kernel/2008/9/9/3239374 Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* jbd2: don't dirty original metadata buffer on abortHidehiro Kawai2008-10-111-1/+4
| | | | | | | | | | | | | | | | | | | | | | | Currently, original metadata buffers are dirtied when they are unfiled whether the journal has aborted or not. Eventually these buffers will be written-back to the filesystem by pdflush. This means some metadata buffers are written to the filesystem without journaling if the journal aborts. So if both journal abort and system crash happen at the same time, the filesystem would become inconsistent state. Additionally, replaying journaled metadata can overwrite the latest metadata on the filesystem partly. Because, if the journal gets aborted, journaled metadata are preserved and replayed during the next mount not to lose uncheckpointed metadata. This would also break the consistency of the filesystem. This patch prevents original metadata buffers from being dirtied on abort by clearing BH_JBDDirty flag from those buffers. Thus, no metadata buffers are written to the filesystem without journaling. Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* jbd2: fix error handling for checkpoint ioHidehiro Kawai2008-10-113-20/+64
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a checkpointing IO fails, current JBD2 code doesn't check the error and continue journaling. This means latest metadata can be lost from both the journal and filesystem. This patch leaves the failed metadata blocks in the journal space and aborts journaling in the case of jbd2_log_do_checkpoint(). To achieve this, we need to do: 1. don't remove the failed buffer from the checkpoint list where in the case of __try_to_free_cp_buf() because it may be released or overwritten by a later transaction 2. jbd2_log_do_checkpoint() is the last chance, remove the failed buffer from the checkpoint list and abort the journal 3. when checkpointing fails, don't update the journal super block to prevent the journaled contents from being cleaned. For safety, don't update j_tail and j_tail_sequence either 4. when checkpointing fails, notify this error to the ext4 layer so that ext4 don't clear the needs_recovery flag, otherwise the journaled contents are ignored and cleaned in the recovery phase 5. if the recovery fails, keep the needs_recovery flag 6. prevent jbd2_cleanup_journal_tail() from being called between __jbd2_journal_drop_transaction() and jbd2_journal_abort() (a possible race issue between jbd2_log_do_checkpoint()s called by jbd2_journal_flush() and __jbd2_log_wait_for_space()) Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* jbd2: abort when failed to log metadata buffersHidehiro Kawai2008-10-121-0/+3
| | | | | | | | | | | | | | | | | | If we failed to write metadata buffers to the journal space and succeeded to write the commit record, stale data can be written back to the filesystem as metadata in the recovery phase. To avoid this, when we failed to write out metadata buffers, abort the journal before writing the commit record. We can also avoid this kind of corruption by using the journal checksum feature because it can detect invalid metadata blocks in the journal and avoid them from being replayed. So we don't need to care about asynchronous commit record writeout with a checksum. Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* jbd2: Fix buffer head leak when writing the commit blockTheodore Ts'o2008-10-061-3/+2Star
| | | | | | | | | Also make sure the buffer heads are marked clean before submitting bh for writing. The previous code was marking the buffer head dirty, which would have forced an unneeded write (and seek) to the journal for no good reason. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: Add debugging markers that can be used by systemtapTheodore Ts'o2008-10-062-0/+9
| | | | | | | This debugging markers are designed to debug problems such as the random filesystem latency problems reported by Arjan. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* jbd2: abort instead of waiting for nonexistent transactionDuane Griffin2008-10-091-2/+17
| | | | | | | | | | | | | | | | | | | | The __jbd2_log_wait_for_space function sits in a loop checkpointing transactions until there is sufficient space free in the journal. However, if there are no transactions to be processed (e.g. because the free space calculation is wrong due to a corrupted filesystem) it will never progress. Check for space being required when no transactions are outstanding and abort the journal instead of endlessly looping. This patch fixes the bug reported by Sami Liedes at: http://bugzilla.kernel.org/show_bug.cgi?id=10976 Signed-off-by: Duane Griffin <duaneg@dghda.com> Cc: Sami Liedes <sliedes@cc.hut.fi> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4/jbd2: Avoid WARN() messages when failing to write to the superblockTheodore Ts'o2008-10-071-2/+25
| | | | | | This fixes some very common warnings reported by kerneloops.org Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* jbd2: clean up how the journal device name is printedTheodore Ts'o2008-09-162-40/+19Star
| | | | | | | | | | | | | Calculate the journal device name once and stash it away in the journal_s structure. This avoids needing to call bdevname() everywhere and reduces stack usage by not needing to allocate an on-stack buffer. In addition, we eliminate the '/' that can appear in device names (e.g. "cciss/c0d0p9" --- see kernel bugzilla #11321) that can cause problems when creating proc directory names, and include the inode number to support ocfs2 which creates multiple journals with different inode numbers. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* Merge branch 'core/locking' into core/urgentIngo Molnar2008-08-121-2/+2
|\
| * lockdep: rename map_[acquire|release]() => lock_map_[acquire|release]()Ingo Molnar2008-08-111-2/+2
| | | | | | | | | | | | | | | | | | | | the names were too generic: drivers/uio/uio.c:87: error: expected identifier or '(' before 'do' drivers/uio/uio.c:87: error: expected identifier or '(' before 'while' drivers/uio/uio.c:113: error: 'map_release' undeclared here (not in a function) Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * lockdep: map_acquirePeter Zijlstra2008-08-111-2/+2
| | | | | | | | | | | | | | | | Most the free-standing lock_acquire() usages look remarkably similar, sweep them into a new helper. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | mm: rename page trylockNick Piggin2008-08-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Converting page lock to new locking bitops requires a change of page flag operation naming, so we might as well convert it to something nicer (!TestSetPageLocked_Lock => trylock_page, SetPageLocked => set_page_locked). This also facilitates lockdeping of page lock. Signed-off-by: Nick Piggin <npiggin@suse.de> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | ext4: unexport jbd2_journal_update_superblockTheodore Ts'o2008-07-261-1/+0Star
| | | | | | | | | | | | | | | | Remove the unused EXPORT_SYMBOL(jbd2_journal_update_superblock). Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* | jbd2: don't abort if flushing file data failedHidehiro Kawai2008-08-011-4/+20
|/ | | | | | | | | | | | | | | In ordered mode, the current jbd2 aborts the journal if a file data buffer has an error. But this behavior is unintended, and we found that it has been adopted accidentally. This patch undoes it and just calls printk() instead of aborting the journal. Unlike a similar patch for ext3/jbd, file data buffers are written via generic_writepages(). But we also need to set AS_EIO into their mappings because wait_on_page_writeback_range() clears AS_EIO before a user process sees it. Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-11-05 07:31:59 +0100