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path: root/fs/xfs/xfs_vfsops.c
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* [XFS] Fix remount,readonly path to flush everything correctly.David Chinner2007-07-14
| | | | | | | | | | | | | | The remount readonly path can fail to writeback properly because we still have active transactions after calling xfs_quiesce_fs(). Further investigation shows that this path is broken in the same ways that the xfs freeze path was broken so fix it the same way. SGI-PV: 964464 SGI-Modid: xfs-linux-melb:xfs-kern:28869a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Tim Shimmin <tes@sgi.com>
* [XFS] Lazy Superblock CountersDavid Chinner2007-07-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we have a couple of hundred transactions on the fly at once, they all typically modify the on disk superblock in some way. create/unclink/mkdir/rmdir modify inode counts, allocation/freeing modify free block counts. When these counts are modified in a transaction, they must eventually lock the superblock buffer and apply the mods. The buffer then remains locked until the transaction is committed into the incore log buffer. The result of this is that with enough transactions on the fly the incore superblock buffer becomes a bottleneck. The result of contention on the incore superblock buffer is that transaction rates fall - the more pressure that is put on the superblock buffer, the slower things go. The key to removing the contention is to not require the superblock fields in question to be locked. We do that by not marking the superblock dirty in the transaction. IOWs, we modify the incore superblock but do not modify the cached superblock buffer. In short, we do not log superblock modifications to critical fields in the superblock on every transaction. In fact we only do it just before we write the superblock to disk every sync period or just before unmount. This creates an interesting problem - if we don't log or write out the fields in every transaction, then how do the values get recovered after a crash? the answer is simple - we keep enough duplicate, logged information in other structures that we can reconstruct the correct count after log recovery has been performed. It is the AGF and AGI structures that contain the duplicate information; after recovery, we walk every AGI and AGF and sum their individual counters to get the correct value, and we do a transaction into the log to correct them. An optimisation of this is that if we have a clean unmount record, we know the value in the superblock is correct, so we can avoid the summation walk under normal conditions and so mount/recovery times do not change under normal operation. One wrinkle that was discovered during development was that the blocks used in the freespace btrees are never accounted for in the AGF counters. This was once a valid optimisation to make; when the filesystem is full, the free space btrees are empty and consume no space. Hence when it matters, the "accounting" is correct. But that means the when we do the AGF summations, we would not have a correct count and xfs_check would complain. Hence a new counter was added to track the number of blocks used by the free space btrees. This is an *on-disk format change*. As a result of this, lazy superblock counters are a mkfs option and at the moment on linux there is no way to convert an old filesystem. This is possible - xfs_db can be used to twiddle the right bits and then xfs_repair will do the format conversion for you. Similarly, you can convert backwards as well. At some point we'll add functionality to xfs_admin to do the bit twiddling easily.... SGI-PV: 964999 SGI-Modid: xfs-linux-melb:xfs-kern:28652a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Tim Shimmin <tes@sgi.com>
* [XFS] Sleeping with the ilock waiting for I/O completion is Bad.David Chinner2007-07-14
| | | | | | | | | | | | | | | | | | Recent fixes to the filesystem freezing code introduced a vn_iowait call in the middle of the sync code. Unfortunately, at the point where this call was added we are holding the ilock. The ilock is needed by I/O completion for unwritten extent conversion and now updating the file size. Hence I/o cannot complete if we hold the ilock while waiting for I/O completion. Fix up the bug and clean the code up around it. SGI-PV: 963674 SGI-Modid: xfs-linux-melb:xfs-kern:28566a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Tim Shimmin <tes@sgi.com>
* [XFS] Add lockdep support for XFSLachlan McIlroy2007-05-07
| | | | | | | | | SGI-PV: 963965 SGI-Modid: xfs-linux-melb:xfs-kern:28485a Signed-off-by: Lachlan McIlroy <lachlan@sgi.com> Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
* [XFS] propogate return codes from flush routinesLachlan McIlroy2007-05-07
| | | | | | | | | | | | | | This patch handles error return values in fs_flush_pages and fs_flushinval_pages. It changes the prototype of fs_flushinval_pages so we can propogate the errors and handle them at higher layers. I also modified xfs_itruncate_start so that it could propogate the error further. SGI-PV: 961990 SGI-Modid: xfs-linux-melb:xfs-kern:28231a Signed-off-by: Lachlan McIlroy <lachlan@sgi.com> Signed-off-by: Stewart Smith <stewart@flamingspork.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
* [XFS] The last argument "lsn" of xfs_trans_commit() is always called withEric Sandeen2007-05-07
| | | | | | | | | | | | | NULL. Patch provided by Eric Sandeen. SGI-PV: 961693 SGI-Modid: xfs-linux-melb:xfs-kern:28199a Signed-off-by: Eric Sandeen <sandeen@sandeen.net> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
* [XFS] Make freeze code a little cleaner.David Chinner2007-02-10
| | | | | | | | | | | | Fixes a few small issues (mostly cosmetic) that were picked up during the review cycle for the last set of freeze path changes. SGI-PV: 959267 SGI-Modid: xfs-linux-melb:xfs-kern:28035a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Tim Shimmin <tes@sgi.com>
* [XFS] Ensure a frozen filesystem has a clean log before writing the dummyDavid Chinner2007-02-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | record. The current Linux XFS freeze code is a mess. We flush the metadata buffers out while we are still allowing new transactions to start and then fail to flush the dirty buffers back out before writing the unmount and dummy records to the log. This leads to problems when the frozen filesystem is used for snapshots - we do log recovery on a readonly image and often it appears that the log image in the snapshot is not correct. Hence we end up with hangs, oops and mount failures when trying to mount a snapshot image that has been created when the filesystem has not been correctly frozen. To fix this, we need to move th metadata flush to after we wait for all current transactions to complete in teh second stage of the freeze. This means that when we write the final log records, the log should be clean and recovery should never occur on a snapshot image created from a frozen filesystem. SGI-PV: 959267 SGI-Modid: xfs-linux-melb:xfs-kern:28010a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Donald Douwsma <donaldd@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
* [XFS] Fix block reservation mechanism.David Chinner2007-02-10
| | | | | | | | | | | | | | | | The block reservation mechanism has been broken since the per-cpu superblock counters were introduced. Make the block reservation code work with the per-cpu counters by syncing the counters, snapshotting the amount of available space and then doing a modifcation of the counter state according to the result. Continue in a loop until we either have no space available or we reserve some space. SGI-PV: 956323 SGI-Modid: xfs-linux-melb:xfs-kern:27895a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Tim Shimmin <tes@sgi.com>
* [XFS] remove unused xflags parameter from sync routinesLachlan McIlroy2007-02-10
| | | | | | | | | SGI-PV: 959137 SGI-Modid: xfs-linux-melb:xfs-kern:27710a Signed-off-by: Lachlan McIlroy <lachlan@sgi.com> Signed-off-by: Eric Sandeen <sandeen@sandeen.net> Signed-off-by: Tim Shimmin <tes@sgi.com>
* [XFS] Fix kmem_zalloc_greedy warnings on 64 bit platforms.Nathan Scott2006-09-27
| | | | | | | | SGI-PV: 955302 SGI-Modid: xfs-linux-melb:xfs-kern:26907a Signed-off-by: Nathan Scott <nathans@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
* [XFS] Prevent free space oversubscription and xfssyncd looping.David Chinner2006-09-07
| | | | | | | | | | | | | | | | | | | | | | | | | | The fix for recent ENOSPC deadlocks introduced certain limitations on allocations. The fix could cause xfssyncd to loop endlessly if we did not leave some space free for the allocator to work correctly. Basically, we needed to ensure that we had at least 4 blocks free for an AG free list and a block for the inode bmap btree at all times. However, this did not take into account the fact that each AG has a free list that needs 4 blocks. Hence any filesystem with more than one AG could cause oversubscription of free space and make xfssyncd spin forever trying to allocate space needed for AG freelists that was not available in the AG. The following patch reserves space for the free lists in all AGs plus the inode bmap btree which prevents oversubscription. It also prevents those blocks from being reported as free space (as they can never be used) and makes the SMP in-core superblock accounting code and the reserved block ioctl respect this requirement. SGI-PV: 955674 SGI-Modid: xfs-linux-melb:xfs-kern:26894a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: David Chatterton <chatz@sgi.com>
* [XFS] Fix a barrier related forced shutdown on mounts with quota enabled.Nathan Scott2006-07-28
| | | | | | | SGI-PV: 912426 SGI-Modid: xfs-linux-melb:xfs-kern:26622a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Remove version 1 directory code. Never functioned on Linux, justNathan Scott2006-06-19
| | | | | | | | | pure bloat. SGI-PV: 952969 SGI-Modid: xfs-linux-melb:xfs-kern:26251a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Fix broken const use inside local suffix_strtoul routine.Nathan Scott2006-06-09
| | | | | | | SGI-PV: 904196 SGI-Modid: xfs-linux-melb:xfs-kern:26201a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Resolve a namespace collision on remaining vtypes for FreeBSDNathan Scott2006-06-09
| | | | | | | | | porters. SGI-PV: 953338 SGI-Modid: xfs-linux-melb:xfs-kern:26108a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Resolve a namespace collision on vnode/vnodeops for FreeBSD porters.Nathan Scott2006-06-09
| | | | | | | SGI-PV: 953338 SGI-Modid: xfs-linux-melb:xfs-kern:26107a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Resolve a namespace collision on vfs/vfsops for FreeBSD porters.Nathan Scott2006-06-09
| | | | | | | SGI-PV: 9533338 SGI-Modid: xfs-linux-melb:xfs-kern:26106a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Portability changes: remove prdev, stick to one diagnosticNathan Scott2006-06-09
| | | | | | | | | interface. SGI-PV: 953338 SGI-Modid: xfs-linux-melb:xfs-kern:26103a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Fix a possible forced shutdown due to mishandling write barriersNathan Scott2006-05-08
| | | | | | | | | with remount,ro. SGI-PV: 951944 SGI-Modid: xfs-linux-melb:xfs-kern:25742a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Reenable write barriers by default.Nathan Scott2006-03-30
| | | | | | | SGI-PV: 912426 SGI-Modid: xfs-linux-melb:xfs-kern:25634a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Implement the silent parameter to fill_super, previously ignored.Nathan Scott2006-03-30
| | | | | | | SGI-PV: 951299 SGI-Modid: xfs-linux-melb:xfs-kern:25632a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] We really suck at spulling. Thanks to Chris Pascoe for fixing allNathan Scott2006-03-28
| | | | | | | | | these typos. SGI-PV: 904196 SGI-Modid: xfs-linux-melb:xfs-kern:25539a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Reenable the noikeep (delete inode cluster space) option by default.Nathan Scott2006-03-21
| | | | | | | SGI-PV: 951200 SGI-Modid: xfs-linux-melb:xfs-kern:25535a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Fixup naming inconsistencies found by Pekka Enberg and one from JanNathan Scott2006-03-21
| | | | | | | | | Engelhardt. SGI-PV: 947038 SGI-Modid: xfs-linux-melb:xfs-kern:25529a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Fix an infinite loop issue in bulkstat when a corrupt inode isNathan Scott2006-03-17
| | | | | | | | | detected. Thanks to Roger Willcocks. SGI-PV: 951054 SGI-Modid: xfs-linux-melb:xfs-kern:25477a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Cleanup the use of zones/slabs, more consistent and allows flags toNathan Scott2006-03-13
| | | | | | | | | be passed. SGI-PV: 949073 SGI-Modid: xfs-linux-melb:xfs-kern:25122a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] On machines with more than 8 cpus, when running parallel I/ODavid Chinner2006-03-13
| | | | | | | | | | | | | threads, the incore superblock lock becomes the limiting factor for buffered write throughput. Make the contended fields in the incore superblock use per-cpu counters so that there is no global lock to limit scalability. SGI-PV: 946630 SGI-Modid: xfs-linux-melb:xfs-kern:25106a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] XFS propagates MS_NOATIME through two levels internally but doesn'tNathan Scott2006-03-13
| | | | | | | | | | actually use it. Kill this dead code. Signed-off-by: Christoph Hellwig <hch@lst.de> SGI-PV: 904196 SGI-Modid: xfs-linux-melb:xfs-kern:25086a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Fix v2 log bufsize reporting in /proc/mounts.Nathan Scott2006-01-10
| | | | | | | SGI-PV: 946760 SGI-Modid: xfs-linux-melb:xfs-kern:24765a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Disable write barriers for now till intermittent IO errors areNathan Scott2006-01-10
| | | | | | | | | understood. SGI-PV: 912426 SGI-Modid: xfs-linux-melb:xfs-kern:202962a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Reverse the sense of COMPAT_ATTR and ATTR2, keeps it simple andNathan Scott2006-01-10
| | | | | | | | | consistent. SGI-PV: 941645 SGI-Modid: xfs-linux-melb:xfs-kern:202961a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Write log dummy record when freezing filesystemChristoph Hellwig2006-01-10
| | | | | | | | SGI-PV: 945483 SGI-Modid: xfs-linux-melb:xfs-kern:202638a Signed-off-by: Christoph Hellwig <hch@sgi.com> Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] do barrier checks earlier. quota initialization may write to theChristoph Hellwig2006-01-10
| | | | | | | | | | filesystem SGI-PV: 912426 SGI-Modid: xfs-linux-melb:xfs-kern:202355a Signed-off-by: Christoph Hellwig <hch@sgi.com> Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Fix typo from when enabling write barriers by default, flags botchNathan Scott2006-01-10
| | | | | | | | | in showargs. SGI-PV: 912426 SGI-Modid: xfs-linux-melb:xfs-kern:24383a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] enable write barriers by defaultChristoph Hellwig2006-01-10
| | | | | | | | SGI-PV: 912426 SGI-Modid: xfs-linux-melb:xfs-kern:201981a Signed-off-by: Christoph Hellwig <hch@sgi.com> Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Fix an inode32 regression - if no options are presented, must stillNathan Scott2005-11-03
| | | | | | | | | set default flags. SGI-PV: 945242 SGI-Modid: xfs-linux-melb:xfs-kern:24292a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Remove old, broken nolog-mode code - noone plans to ever fix it.Nathan Scott2005-11-01
| | | | | | | SGI-PV: 944821 SGI-Modid: xfs-linux:xfs-kern:24213a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Rework fid encode/decode wrt 64 bit inums interacting with NFS.Nathan Scott2005-11-01
| | | | | | | SGI-PV: 937127 SGI-Modid: xfs-linux:xfs-kern:24201a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Rework the final mount options flag bit to make room for more.Nathan Scott2005-11-01
| | | | | | | SGI-PV: 943866 SGI-Modid: xfs-linux:xfs-kern:24030a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Disable attr2 by default, until a more appropriate time to enableNathan Scott2005-11-01
| | | | | | | | | it. SGI-PV: 941645 SGI-Modid: xfs-linux:xfs-kern:24002a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Show additional mount options in /proc/mounts, fix up some debugNathan Scott2005-11-01
| | | | | | | | | code. SGI-PV: 941645 SGI-Modid: xfs-linux:xfs-kern:23926a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Update license/copyright notices to match the prefered SGINathan Scott2005-11-01
| | | | | | | | | boilerplate. SGI-PV: 913862 SGI-Modid: xfs-linux:xfs-kern:23903a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Remove xfs_macros.c, xfs_macros.h, rework headers a whole lot.Nathan Scott2005-11-01
| | | | | | | SGI-PV: 943122 SGI-Modid: xfs-linux:xfs-kern:23901a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Track external log/realtime device names for correct reporting inNathan Scott2005-11-01
| | | | | | | | | /proc/mounts. SGI-PV: 942984 SGI-Modid: xfs-linux:xfs-kern:23862a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Ondisk format extension for extended attributes (attr2). Basically,Nathan Scott2005-11-01
| | | | | | | | | | | | | | the data/attr forks now grow up/down from either end of the literal area, rather than dividing the literal area into two chunks and growing both upward. Means we can now make much more efficient use of the attribute space, incl. fitting DMF attributes inline in 256 byte inodes, and large jumps in dbench3 performance numbers. It is self enabling, but can be forced on/off via the attr2/noattr2 mount options. SGI-PV: 941645 SGI-Modid: xfs-linux:xfs-kern:23835a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Introduce two new mount options (nolargeio/largeio) to allowDavid Chinner2005-11-01
| | | | | | | | | | | | | filesystems to expose the filesystem stripe width in stat(2) rather than the page cache size. This allows applications requiring high bandwidth to easily determine the optimum I/O size for the underlying filesystem. The default is to report the page cache size (i.e. "nolargeio"). SGI-PV: 942818 SGI-Modid: xfs-linux:xfs-kern:23830a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Provide a mechiansm for flushing delalloc before quota reporting.Nathan Scott2005-11-01
| | | | | | | SGI-PV: 942815 SGI-Modid: xfs-linux:xfs-kern:23829a Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] write barrier support Issue all log sync operations as orderedChristoph Hellwig2005-11-01
| | | | | | | | | | | | | | | | | writes. In addition flush the disk cache on fsync if the sync cached operation didn't sync the log to disk (this requires some additional bookeping in the transaction and log code). If the device doesn't claim to support barriers, the filesystem has an extern log volume or the trial superblock write with barriers enabled failed we disable barriers and print a warning. We should probably fail the mount completely, but that could lead to nasty boot failures for the root filesystem. Not enabled by default yet, needs more destructive testing first. SGI-PV: 912426 SGI-Modid: xfs-linux:xfs-kern:198723a Signed-off-by: Christoph Hellwig <hch@sgi.com> Signed-off-by: Nathan Scott <nathans@sgi.com>
* [XFS] Sort out some cosmetic differences between XFS trees.Nathan Scott2005-09-04
| | | | | | | SGI-PV: 904196 SGI-Modid: xfs-linux-melb:xfs-kern:23719a Signed-off-by: Nathan Scott <nathans@sgi.com>
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