summaryrefslogtreecommitdiff
path: root/fs/xfs/xfs_vnodeops.c
AgeCommit message (Collapse)Author
2011-11-08xfs: Fix possible memory corruption in xfs_readlinkCarlos Maiolino
Fixes a possible memory corruption when the link is larger than MAXPATHLEN and XFS_DEBUG is not enabled. This also remove the S_ISLNK assert, since the inode mode is checked previously in xfs_readlink_by_handle() and via VFS. Updated to address concerns raised by Ben Hutchings about the loose attention paid to 32- vs 64-bit values, and the lack of handling a potentially negative pathlen value: - Changed type of "pathlen" to be xfs_fsize_t, to match that of ip->i_d.di_size - Added checking for a negative pathlen to the too-long pathlen test, and generalized the message that gets reported in that case to reflect the change As a result, if a negative pathlen were encountered, this function would return EFSCORRUPTED (and would fail an assertion for a debug build)--just as would a too-long pathlen. Signed-off-by: Alex Elder <aelder@sgi.com> Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2011-10-12xfs: clean up xfs_ioerror_alertChristoph Hellwig
Instead of passing the block number and mount structure explicitly get them off the bp and fix make the argument order more natural. Also move it to xfs_buf.c and stop printing the device name given that we already get the fs name as part of xfs_alert, and we know what device is operates on because of the caller that gets printed, finally rename it to xfs_buf_ioerror_alert and pass __func__ as argument where it makes sense. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-10-12xfs: simplify xfs_trans_ijoin* againChristoph Hellwig
There is no reason to keep a reference to the inode even if we unlock it during transaction commit because we never drop a reference between the ijoin and commit. Also use this fact to merge xfs_trans_ijoin_ref back into xfs_trans_ijoin - the third argument decides if an unlock is needed now. I'm actually starting to wonder if allowing inodes to be unlocked at transaction commit really is worth the effort. The only real benefit is that they can be unlocked earlier when commiting a synchronous transactions, but that could be solved by doing the log force manually after the unlock, too. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-10-12xfs: unlock the inode before log force in xfs_change_file_spaceChristoph Hellwig
Let the transaction commit unlock the inode before it potentially causes a synchronous log force. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-10-12xfs: rename xfs_bmapi to xfs_bmapi_writeDave Chinner
Now that all the read-only users of xfs_bmapi have been converted to use xfs_bmapi_read(), we can remove all the read-only handling cases from xfs_bmapi(). Once this is done, rename xfs_bmapi to xfs_bmapi_write to reflect the fact it is for allocation only. This enables us to kill the XFS_BMAPI_WRITE flag as well. Also clean up xfs_bmapi_write to the style used in the newly added xfs_bmapi_read/delay functions. Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-10-12xfs: introduce xfs_bmapi_read()Dave Chinner
xfs_bmapi() currently handles both extent map reading and allocation. As a result, the code is littered with "if (wr)" branches to conditionally do allocation operations if required. This makes the code much harder to follow and causes significant indent issues with the code. Given that read mapping is much simpler than allocation, we can split out read mapping from xfs_bmapi() and reuse the logic that we have already factored out do do all the hard work of handling the extent map manipulations. The results in a much simpler function for the common extent read operations, and will allow the allocation code to be simplified in another commit. Once xfs_bmapi_read() is implemented, convert all the callers of xfs_bmapi() that are only reading extents to use the new function. Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-10-12xfs: Check the return value of xfs_trans_get_buf()Chandra Seetharaman
Check the return value of xfs_trans_get_buf() and fail appropriately. Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-10-12xfs: remove i_iocountChristoph Hellwig
We now have an i_dio_count filed and surrounding infrastructure to wait for direct I/O completion instead of i_icount, and we have never needed to iocount waits for buffered I/O given that we only set the page uptodate after finishing all required work. Thus remove i_iocount, and replace the actually needed waits with calls to inode_dio_wait. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-08-12xfs: replace xfs_buf_geterror() with bp->b_errorChandra Seetharaman
Since we just checked bp for NULL, it is ok to replace xfs_buf_geterror() with bp->b_error in these places. Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-08-12xfs: Check the return value of xfs_buf_read() for NULLChandra Seetharaman
Check the return value of xfs_buf_read() for NULL and return ENOMEM if it is NULL. This is necessary in a few spots to avoid subsequent code blindly dereferencing the null buffer pointer. Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-08-08Merge branch 'master' of ↵Alex Elder
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux
2011-07-26xfs: get rid of open-coded S_ISREG(), etc.Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-25xfs: Remove the macro XFS_BUF_PTRChandra Seetharaman
Remove the definition and usages of the macro XFS_BUF_PTR. Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-07-25xfs: Remove the macro XFS_BUF_ERROR and familyChandra Seetharaman
Remove the definitions and usage of the macros XFS_BUF_ERROR, XFS_BUF_GETERROR and XFS_BUF_ISERROR. Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-07-08xfs: return the buffer locked from xfs_buf_get_uncachedChristoph Hellwig
All other xfs_buf_get/read-like helpers return the buffer locked, make sure xfs_buf_get_uncached isn't different for no reason. Half of the callers already lock it directly after, and the others probably should also keep it locked if only for consistency and beeing able to use xfs_buf_rele, but I'll leave that for later. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Alex Elder <aelder@sgi.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
2011-07-08xfs: split xfs_itruncate_finishChristoph Hellwig
Split the guts of xfs_itruncate_finish that loop over the existing extents and calls xfs_bunmapi on them into a new helper, xfs_itruncate_externs. Make xfs_attr_inactive call it directly instead of xfs_itruncate_finish, which allows to simplify the latter a lot, by only letting it deal with the data fork. As a result xfs_itruncate_finish is renamed to xfs_itruncate_data to make its use case more obvious. Also remove the sync parameter from xfs_itruncate_data, which has been unessecary since the introduction of the busy extent list in 2002, and completely dead code since 2003 when the XFS_BMAPI_ASYNC parameter was made a no-op. I can't actually see why the xfs_attr_inactive needs to set the transaction sync, but let's keep this patch simple and without changes in behaviour. Also avoid passing a useless argument to xfs_isize_check, and make it private to xfs_inode.c. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Alex Elder <aelder@sgi.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
2011-07-08xfs: kill xfs_itruncate_startChristoph Hellwig
xfs_itruncate_start is a rather length wrapper that evaluates to a call to xfs_ioend_wait and xfs_tosspages, and only has two callers. Instead of using the complicated checks left over from IRIX where we can to truncate the pagecache just call xfs_tosspages (aka truncate_inode_pages) directly as we want to get rid of all data after i_size, and truncate_inode_pages handles incorrect alignments and too large offsets just fine. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Alex Elder <aelder@sgi.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
2011-07-08xfs: split xfs_setattrChristoph Hellwig
Split up xfs_setattr into two functions, one for the complex truncate handling, and one for the trivial attribute updates. Also move both new routines to xfs_iops.c as they are fairly Linux-specific. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Alex Elder <aelder@sgi.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
2011-06-24xfs: clear XFS_IDIRTY_RELEASE on truncate downDave Chinner
When an inode is truncated down, speculative preallocation is removed from the inode. This should also reset the state bits for controlling whether preallocation is subsequently removed when the file is next closed. The flag is not being cleared, so repeated operations on a file that first involve a truncate (e.g. multiple repeated dd invocations on a file) give different file layouts for the second and subsequent invocations. Fix this by clearing the XFS_IDIRTY_RELEASE state bit when the XFS_ITRUNCATED bit is detected in xfs_release() and hence ensure that speculative delalloc is removed on files that have been truncated down. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-03-31Fix common misspellingsLucas De Marchi
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-25xfs: preallocation transactions do not need to be synchronousDave Chinner
Preallocation and hole punch transactions are currently synchronous and this is causing performance problems in some cases. The transactions don't need to be synchronous as we don't need to guarantee the preallocation is persistent on disk until a fdatasync, fsync, sync operation occurs. If the file is opened O_SYNC or O_DATASYNC, only then should the transaction be issued synchronously. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Alex Elder <aelder@sgi.com>
2011-03-06xfs: Convert remaining cmn_err() callers to new APIDave Chinner
Once converted, kill the remainder of the cmn_err() interface. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Alex Elder <aelder@sgi.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2011-03-06xfs: convert xfs_fs_cmn_err to new error logging APIDave Chinner
Continue to clean up the error logging code by converting all the callers of xfs_fs_cmn_err() to the new API. Once done, remove the unused old API function. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Alex Elder <aelder@sgi.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2011-02-23xfs: more sensible inode refcounting for iallocChristoph Hellwig
Currently we return iodes from xfs_ialloc with just a single reference held. But we need two references, as one is dropped during transaction commit and the second needs to be transfered to the VFS. Change xfs_ialloc to use xfs_iget plus xfs_trans_ijoin_ref to grab two references to the inode, and remove the now superflous IHOLD calls from all callers. This also greatly simplifies the error handling in xfs_create and also allow to remove xfs_trans_iget as no other callers are left. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
2010-12-23xfs: don't truncate prealloc from frequently accessed inodesDave Chinner
A long standing problem for streaming writeѕ through the NFS server has been that the NFS server opens and closes file descriptors on an inode for every write. The result of this behaviour is that the ->release() function is called on every close and that results in XFS truncating speculative preallocation beyond the EOF. This has an adverse effect on file layout when multiple files are being written at the same time - they interleave their extents and can result in severe fragmentation. To avoid this problem, keep track of ->release calls made on a dirty inode. For most cases, an inode is only going to be opened once for writing and then closed again during it's lifetime in cache. Hence if there are multiple ->release calls when the inode is dirty, there is a good chance that the inode is being accessed by the NFS server. Hence set a flag the first time ->release is called while there are delalloc blocks still outstanding on the inode. If this flag is set when ->release is next called, then do no truncate away the speculative preallocation - leave it there so that subsequent writes do not need to reallocate the delalloc space. This will prevent interleaving of extents of different inodes written concurrently to the same AG. If we get this wrong, it is not a big deal as we truncate speculative allocation beyond EOF anyway in xfs_inactive() when the inode is thrown out of the cache. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2010-10-18xfs: Extend project quotas to support 32bit project idsArkadiusz Mi?kiewicz
This patch adds support for 32bit project quota identifiers. On disk format is backward compatible with 16bit projid numbers. projid on disk is now kept in two 16bit values - di_projid_lo (which holds the same position as old 16bit projid value) and new di_projid_hi (takes existing padding) and converts from/to 32bit value on the fly. xfs_admin (for existing fs), mkfs.xfs (for new fs) needs to be used to enable PROJID32BIT support. Signed-off-by: Arkadiusz Miśkiewicz <arekm@maven.pl> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2010-10-18xfs: remove xfs_buf wrappersChristoph Hellwig
Stop having two different names for many buffer functions and use the more descriptive xfs_buf_* names directly. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2010-10-18xfs: remove xfs_cred.hChristoph Hellwig
We're not actually passing around credentials inside XFS for a while now, so remove all xfs_cred.h with it's cred_t typedef and all instances of it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2010-10-18xfs: rename xfs_buf_get_nodaddr to be more appropriateDave Chinner
xfs_buf_get_nodaddr() is really used to allocate a buffer that is uncached. While it is not directly assigned a disk address, the fact that they are not cached is a more important distinction. With the upcoming uncached buffer read primitive, we should be consistent with this disctinction. While there, make page allocation in xfs_buf_get_nodaddr() safe against memory reclaim re-entrancy into the filesystem by allowing a flags parameter to be passed. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Alex Elder <aelder@sgi.com>
2010-10-18xfs: don't use vfs writeback for pure metadata modificationsDave Chinner
Under heavy multi-way parallel create workloads, the VFS struggles to write back all the inodes that have been changed in age order. The bdi flusher thread becomes CPU bound, spending 85% of it's time in the VFS code, mostly traversing the superblock dirty inode list to separate dirty inodes old enough to flush. We already keep an index of all metadata changes in age order - in the AIL - and continued log pressure will do age ordered writeback without any extra overhead at all. If there is no pressure on the log, the xfssyncd will periodically write back metadata in ascending disk address offset order so will be very efficient. Hence we can stop marking VFS inodes dirty during transaction commit or when changing timestamps during transactions. This will keep the inodes in the superblock dirty list to those containing data or unlogged metadata changes. However, the timstamp changes are slightly more complex than this - there are a couple of places that do unlogged updates of the timestamps, and the VFS need to be informed of these. Hence add a new function xfs_trans_ichgtime() for transactional changes, and leave xfs_ichgtime() for the non-transactional changes. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Alex Elder <aelder@sgi.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2010-10-18xfs: Introduce XFS_IOC_ZERO_RANGEDave Chinner
XFS_IOC_ZERO_RANGE is the equivalent of an atomic XFS_IOC_UNRESVSP/ XFS_IOC_RESVSP call pair. It enabled ranges of written data to be turned into zeroes without requiring IO or having to free and reallocate the extents in the range given as would occur if we had to punch and then preallocate them separately. This enables applications to zero parts of files very quickly without changing the layout of the files in any way. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2010-09-03xfs: prevent 32bit overflow in space reservationDave Chinner
If we attempt to preallocate more than 2^32 blocks of space in a single syscall, the transaction block reservation will overflow leading to a hangs in the superblock block accounting code. This is trivially reproduced with xfs_io. Fix the problem by capping the allocation reservation to the maximum number of blocks a single xfs_bmapi() call can allocate (2^21 blocks). Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2010-08-09xfs: new truncate sequenceChristoph Hellwig
Convert XFS to the new truncate sequence. We still can have errors after updating the file size in xfs_setattr, but these are real I/O errors and lead to a transaction abort and filesystem shutdown, so they are not an issue. Errors from ->write_begin and write_end can now be handled correctly because we can actually get rid of the delalloc extents while previous the buffer state was stipped in block_invalidatepage. There is still no error handling for ->direct_IO, because doing so will need some major restructuring given that we only have the iolock shared and do not hold i_mutex at all. Fortunately leaving the normally allocated blocks behind there is not a major issue and this will get cleaned up by xfs_free_eofblock later. Note: the patch is against Al's vfs.git tree as that contains the nessecary preparations. I'd prefer to get it applied there so that we can get some testing in linux-next. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-07-26xfs: fix unsigned underflow in xfs_free_eofblocksKulikov Vasiliy
map_len is unsigned. Checking map_len <= 0 is buggy when it should be below zero. So, check exact expression instead of map_len. Signed-off-by: Kulikov Vasiliy <segooon@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com>
2010-07-26xfs: split xfs_itrace_entryChristoph Hellwig
Replace the xfs_itrace_entry catchall with specific trace points. For most simple callers we now use the simple inode class, which used to be the iget class, but add more details tracing for namespace events, which now includes the name of the directory entries manipulated. Remove the xfs_inactive trace point, which is a duplicate of the clear_inode one, and the xfs_change_file_space trace point, which is immediately followed by the more specific alloc/free space trace points. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com>
2010-07-26xfs: remove unused delta tracking code in xfs_bmapiChristoph Hellwig
This code was introduced four years ago in commit 3e57ecf640428c01ba1ed8c8fc538447ada1715b without any review and has been unused since. Remove it just as the rest of the code introduced in that commit to reduce that stack usage and complexity in this central piece of code. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com>
2010-07-26xfs: simplify inode to transaction joiningChristoph Hellwig
Currently we need to either call IHOLD or xfs_trans_ihold on an inode when joining it to a transaction via xfs_trans_ijoin. This patches instead makes xfs_trans_ijoin usable on it's own by doing an implicity xfs_trans_ihold, which also allows us to drop the third argument. For the case where we want to hold a reference on the inode a xfs_trans_ijoin_ref wrapper is added which does the IHOLD and marks the inode for needing an xfs_iput. In addition to the cleaner interface to the caller this also simplifies the implementation. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com>
2010-07-26xfs: remove unneeded #include statementsChristoph Hellwig
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <david@fromorbit.com>
2010-07-26xfs: drop dmapi hooksChristoph Hellwig
Dmapi support was never merged upstream, but we still have a lot of hooks bloating XFS for it, all over the fast pathes of the filesystem. This patch drops over 700 lines of dmapi overhead. If we'll ever get HSM support in mainline at least the namespace events can be done much saner in the VFS instead of the individual filesystem, so it's not like this is much help for future work. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com>
2010-06-24xfs: remove block number from inode lookup codeDave Chinner
The block number comes from bulkstat based inode lookups to shortcut the mapping calculations. We ar enot able to trust anything from bulkstat, so drop the block number as well so that the correct lookups and mappings are always done. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2010-05-28xfs: Check new inode size is OK before preallocatingDave Chinner
The new xfsqa test 228 tries to preallocate more space than the filesystem contains. it should fail, but instead triggers an assert about lock flags. The failure is due to the size extension failing in vmtruncate() due to rlimit being set. Check this before we start the preallocation to avoid allocating space that will never be used. Also the path through xfs_vn_allocate already holds the IO lock, so it should not be present in the lock flags when the setattr fails. Hence the assert needs to take this into account. This will prevent other such callers from hitting this incorrect ASSERT. (Fixed a reference to "newsize" to read "new_size". -Alex) Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2010-03-01xfs: remove wrapper for the fsync file operationChristoph Hellwig
Currently the fsync file operation is divided into a low-level routine doing all the work and one that implements the Linux file operation and does minimal argument wrapping. This is a leftover from the days of the vnode operations layer and can be removed to simplify the code a bit, as well as preparing for the implementation of an optimized fdatasync which needs to look at the Linux inode state. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2010-02-12xfs: optimize log flushing in xfs_fsyncChristoph Hellwig
If we have a pinned inode it must have a log item attached to it. Usually that log item will have ili_last_lsn already set, in which case we only need to flush the log up to that LSN instead of doing a full log force. This gives speedups of about 5% in some fsync heavy workloads. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2010-02-01xfs: remove invalid barrier optimization from xfs_fsyncChristoph Hellwig
We always need to flush the disk write cache and can't skip it just because the no inode attributes have changed. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <david@fromorbit.com>
2010-01-21xfs: cleanup up xfs_log_force calling conventionsChristoph Hellwig
Remove the XFS_LOG_FORCE argument which was always set, and the XFS_LOG_URGE define, which was never used. Split xfs_log_force into a two helpers - xfs_log_force which forces the whole log, and xfs_log_force_lsn which forces up to the specified LSN. The underlying implementations already were entirely separate, as were the users. Also re-indent the new _xfs_log_force/_xfs_log_force which previously had a weird coding style. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2010-01-21xfs: remove duplicate buffer flagsChristoph Hellwig
Currently we define aliases for the buffer flags in various namespaces, which only adds confusion. Remove all but the XBF_ flags to clean this up a bit. Note that we still abuse XFS_B_ASYNC/XBF_ASYNC for some non-buffer uses, but I'll clean that up later. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <david@fromorbit.com> Signed-off-by: Alex Elder <aelder@sgi.com>
2010-01-19xfs: convert DM ops to use unsigned char namesDave Chinner
dmops uses a signed char for it's namespace event. To be consistent with the rest of the code, convert them to unsigned char for the namespace string. Signed-off-by: Dave Chinner <david@fromorbit.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2010-01-10xfs: fix timestamp handling in xfs_setattrChristoph Hellwig
We currently have some rather odd code in xfs_setattr for updating the a/c/mtime timestamps: - first we do a non-transaction update if all three are updated together - second we implicitly update the ctime for various changes instead of relying on the ATTR_CTIME flag - third we set the timestamps to the current time instead of the arguments in the iattr structure in many cases. This patch makes sure we update it in a consistent way: - always transactional - ctime is only updated if ATTR_CTIME is set or we do a size update, which is a special case - always to the times passed in from the caller instead of the current time The only non-size caller of xfs_setattr that doesn't come from the VFS is updated to set ATTR_CTIME and pass in a valid ctime value. Reported-by: Eric Blake <ebb9@byu.net> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2009-12-15xfs: event tracing supportChristoph Hellwig
Convert the old xfs tracing support that could only be used with the out of tree kdb and xfsidbg patches to use the generic event tracer. To use it make sure CONFIG_EVENT_TRACING is enabled and then enable all xfs trace channels by: echo 1 > /sys/kernel/debug/tracing/events/xfs/enable or alternatively enable single events by just doing the same in one event subdirectory, e.g. echo 1 > /sys/kernel/debug/tracing/events/xfs/xfs_ihold/enable or set more complex filters, etc. In Documentation/trace/events.txt all this is desctribed in more detail. To reads the events do a cat /sys/kernel/debug/tracing/trace Compared to the last posting this patch converts the tracing mostly to the one tracepoint per callsite model that other users of the new tracing facility also employ. This allows a very fine-grained control of the tracing, a cleaner output of the traces and also enables the perf tool to use each tracepoint as a virtual performance counter, allowing us to e.g. count how often certain workloads git various spots in XFS. Take a look at http://lwn.net/Articles/346470/ for some examples. Also the btree tracing isn't included at all yet, as it will require additional core tracing features not in mainline yet, I plan to deliver it later. And the really nice thing about this patch is that it actually removes many lines of code while adding this nice functionality: fs/xfs/Makefile | 8 fs/xfs/linux-2.6/xfs_acl.c | 1 fs/xfs/linux-2.6/xfs_aops.c | 52 - fs/xfs/linux-2.6/xfs_aops.h | 2 fs/xfs/linux-2.6/xfs_buf.c | 117 +-- fs/xfs/linux-2.6/xfs_buf.h | 33 fs/xfs/linux-2.6/xfs_fs_subr.c | 3 fs/xfs/linux-2.6/xfs_ioctl.c | 1 fs/xfs/linux-2.6/xfs_ioctl32.c | 1 fs/xfs/linux-2.6/xfs_iops.c | 1 fs/xfs/linux-2.6/xfs_linux.h | 1 fs/xfs/linux-2.6/xfs_lrw.c | 87 -- fs/xfs/linux-2.6/xfs_lrw.h | 45 - fs/xfs/linux-2.6/xfs_super.c | 104 --- fs/xfs/linux-2.6/xfs_super.h | 7 fs/xfs/linux-2.6/xfs_sync.c | 1 fs/xfs/linux-2.6/xfs_trace.c | 75 ++ fs/xfs/linux-2.6/xfs_trace.h | 1369 +++++++++++++++++++++++++++++++++++++++++ fs/xfs/linux-2.6/xfs_vnode.h | 4 fs/xfs/quota/xfs_dquot.c | 110 --- fs/xfs/quota/xfs_dquot.h | 21 fs/xfs/quota/xfs_qm.c | 40 - fs/xfs/quota/xfs_qm_syscalls.c | 4 fs/xfs/support/ktrace.c | 323 --------- fs/xfs/support/ktrace.h | 85 -- fs/xfs/xfs.h | 16 fs/xfs/xfs_ag.h | 14 fs/xfs/xfs_alloc.c | 230 +----- fs/xfs/xfs_alloc.h | 27 fs/xfs/xfs_alloc_btree.c | 1 fs/xfs/xfs_attr.c | 107 --- fs/xfs/xfs_attr.h | 10 fs/xfs/xfs_attr_leaf.c | 14 fs/xfs/xfs_attr_sf.h | 40 - fs/xfs/xfs_bmap.c | 507 +++------------ fs/xfs/xfs_bmap.h | 49 - fs/xfs/xfs_bmap_btree.c | 6 fs/xfs/xfs_btree.c | 5 fs/xfs/xfs_btree_trace.h | 17 fs/xfs/xfs_buf_item.c | 87 -- fs/xfs/xfs_buf_item.h | 20 fs/xfs/xfs_da_btree.c | 3 fs/xfs/xfs_da_btree.h | 7 fs/xfs/xfs_dfrag.c | 2 fs/xfs/xfs_dir2.c | 8 fs/xfs/xfs_dir2_block.c | 20 fs/xfs/xfs_dir2_leaf.c | 21 fs/xfs/xfs_dir2_node.c | 27 fs/xfs/xfs_dir2_sf.c | 26 fs/xfs/xfs_dir2_trace.c | 216 ------ fs/xfs/xfs_dir2_trace.h | 72 -- fs/xfs/xfs_filestream.c | 8 fs/xfs/xfs_fsops.c | 2 fs/xfs/xfs_iget.c | 111 --- fs/xfs/xfs_inode.c | 67 -- fs/xfs/xfs_inode.h | 76 -- fs/xfs/xfs_inode_item.c | 5 fs/xfs/xfs_iomap.c | 85 -- fs/xfs/xfs_iomap.h | 8 fs/xfs/xfs_log.c | 181 +---- fs/xfs/xfs_log_priv.h | 20 fs/xfs/xfs_log_recover.c | 1 fs/xfs/xfs_mount.c | 2 fs/xfs/xfs_quota.h | 8 fs/xfs/xfs_rename.c | 1 fs/xfs/xfs_rtalloc.c | 1 fs/xfs/xfs_rw.c | 3 fs/xfs/xfs_trans.h | 47 + fs/xfs/xfs_trans_buf.c | 62 - fs/xfs/xfs_vnodeops.c | 8 70 files changed, 2151 insertions(+), 2592 deletions(-) Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2009-12-11xfs: simplify xfs_buf_get / xfs_buf_read interfacesChristoph Hellwig
Currently the low-level buffer cache interfaces are highly confusing as we have a _flags variant of each that does actually respect the flags, and one without _flags which has a flags argument that gets ignored and overriden with a default set. Given that very few places use the default arguments get rid of the duplication and convert all callers to pass the flags explicitly. Also remove the now confusing _flags postfix. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <david@fromorbit.com> Signed-off-by: Alex Elder <aelder@sgi.com>