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linux/fs/xfs
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Dave Chinner fd45e47841 xfs: Ensure we force all busy extents in range to disk 
When we search for and find a busy extent during allocation we
force the log out to ensure the extent free transaction is on
disk before the allocation transaction. The current implementation
has a subtle bug in it--it does not handle multiple overlapping
ranges.

That is, if we free lots of little extents into a single
contiguous extent, then allocate the contiguous extent, the busy
search code stops searching at the first extent it finds that
overlaps the allocated range. It then uses the commit LSN of the
transaction to force the log out to.

Unfortunately, the other busy ranges might have more recent
commit LSNs than the first busy extent that is found, and this
results in xfs_alloc_search_busy() returning before all the
extent free transactions are on disk for the range being
allocated. This can lead to potential metadata corruption or
stale data exposure after a crash because log replay won't replay
all the extent free transactions that cover the allocation range.

Modified-by: Alex Elder <aelder@sgi.com>

(Dropped the "found" argument from the xfs_alloc_busysearch trace
event.)

Signed-off-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
2010-01-10 12:22:02 -06:00
..
linux-2.6 xfs: Ensure we force all busy extents in range to disk 2010-01-10 12:22:02 -06:00
quota xfs: event tracing support 2009-12-14 23:08:16 -06:00
support xfs: event tracing support 2009-12-14 23:08:16 -06:00
Kconfig xfs: use generic Posix ACL code 2009-06-10 17:07:47 +02:00
Makefile xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_acl.h sanitize xattr handler prototypes 2009-12-16 12:16:49 -05:00
xfs_ag.h xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_alloc_btree.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_alloc_btree.h
xfs_alloc.c xfs: Ensure we force all busy extents in range to disk 2010-01-10 12:22:02 -06:00
xfs_alloc.h xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_arch.h xfs: use generic Posix ACL code 2009-06-10 17:07:47 +02:00
xfs_attr_leaf.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_attr_leaf.h [XFS] Remove macro-to-function indirections in attr code 2009-01-09 15:46:44 +11:00
xfs_attr_sf.h xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_attr.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_attr.h xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_bit.c
xfs_bit.h [XFS] Remove macro-to-function indirections in the mask code 2009-01-09 15:53:54 +11:00
xfs_bmap_btree.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_bmap_btree.h xfs: kill xfs_bmbt_rec_32/64 types 2009-12-16 13:41:20 -06:00
xfs_bmap.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_bmap.h xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_btree_trace.c
xfs_btree_trace.h xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_btree.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_btree.h xfs: add more statics & drop some unused functions 2009-08-31 14:46:20 -05:00
xfs_buf_item.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_buf_item.h xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_da_btree.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_da_btree.h xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_dfrag.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_dfrag.h [XFS] Move copy_from_user calls out of ioctl helpers into ioctl switch. 2008-12-02 17:08:01 +11:00
xfs_dinode.h xfs: remove m_litino 2009-03-29 09:51:14 +02:00
xfs_dir2_block.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_dir2_block.h
xfs_dir2_data.c
xfs_dir2_data.h xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_dir2_leaf.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_dir2_leaf.h
xfs_dir2_node.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_dir2_node.h
xfs_dir2_sf.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_dir2_sf.h [XFS] kill xfs_dinode_core_t 2008-12-01 11:37:35 +11:00
xfs_dir2.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_dir2.h
xfs_dmapi.h
xfs_dmops.c
xfs_error.c [XFS] avoid memory allocations in xfs_fs_vcmn_err 2008-12-22 18:02:01 +11:00
xfs_error.h [XFS] avoid memory allocations in xfs_fs_vcmn_err 2008-12-22 18:02:01 +11:00
xfs_extfree_item.c
xfs_extfree_item.h [XFS] remove always-true #ifndef HAVE_FORMAT32 tests 2009-01-22 14:07:31 +11:00
xfs_filestream.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_filestream.h xfs: kill the STATIC_INLINE macro 2009-12-11 15:11:22 -06:00
xfs_fs.h trivial: fix typo "for for" in multiple files 2009-09-21 15:14:54 +02:00
xfs_fsops.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_fsops.h filesystem freeze: add error handling of write_super_lockfs/unlockfs 2009-01-09 16:54:42 -08:00
xfs_ialloc_btree.c xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_ialloc_btree.h xfs: remove superflous inobt macros 2009-02-09 08:37:14 +01:00
xfs_ialloc.c xfs: kill the STATIC_INLINE macro 2009-12-11 15:11:22 -06:00
xfs_ialloc.h xfs: rationalize xfs_inobt_lookup* 2009-09-01 12:45:39 -05:00
xfs_iget.c kill I_LOCK 2009-12-17 11:03:25 -05:00
xfs_inode_item.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_inode_item.h xfs: kill xfs_bmbt_rec_32/64 types 2009-12-16 13:41:20 -06:00
xfs_inode.c xfs: Don't flush stale inodes 2010-01-10 12:22:00 -06:00
xfs_inode.h xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_inum.h xfs: remove XFS_INO64_OFFSET 2009-08-31 14:46:22 -05:00
xfs_iomap.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_iomap.h xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_itable.c xfs: implement ->dirty_inode to fix timestamp handling 2009-10-08 12:00:03 -05:00
xfs_itable.h xfs: add more statics & drop some unused functions 2009-08-31 14:46:20 -05:00
xfs_log_priv.h xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_log_recover.c Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs 2009-12-15 09:12:43 -08:00
xfs_log_recover.h
xfs_log.c xfs: improve metadata I/O merging in the elevator 2009-12-16 13:41:19 -06:00
xfs_log.h xfs: cleanup log unmount handling 2009-03-16 08:19:29 +01:00
xfs_mount.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_mount.h xfs: cleanup dmapi macros in the umount path 2009-12-11 15:11:23 -06:00
xfs_mru_cache.c xfs: add more statics & drop some unused functions 2009-08-31 14:46:20 -05:00
xfs_mru_cache.h xfs: add more statics & drop some unused functions 2009-08-31 14:46:20 -05:00
xfs_quota.h xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_refcache.h
xfs_rename.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_rtalloc.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_rtalloc.h xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_rw.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_rw.h xfs: uninline xfs_get_extsz_hint 2009-12-11 15:11:22 -06:00
xfs_sb.h [XFS] Remove the rest of the macro-to-function indirections. 2009-01-19 14:45:55 +11:00
xfs_trans_ail.c xfs: copy li_lsn before dropping AIL lock 2009-11-17 10:26:49 -06:00
xfs_trans_buf.c xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_trans_extfree.c
xfs_trans_inode.c xfs: simplify xfs_trans_iget 2009-09-01 12:46:16 -05:00
xfs_trans_item.c xfs: fix various typos 2009-03-29 09:55:42 +02:00
xfs_trans_priv.h
xfs_trans_space.h xfs: remove superflous inobt macros 2009-02-09 08:37:14 +01:00
xfs_trans.c xfs: I/O completion handlers must use NOFS allocations 2009-12-11 15:11:20 -06:00
xfs_trans.h xfs: event tracing support 2009-12-14 23:08:16 -06:00
xfs_types.h xfs: remove uchar_t/ushort_t/uint_t/ulong_t types 2009-02-09 08:37:39 +01:00
xfs_utils.c xfs: kill xfs_qmops 2009-06-08 15:33:32 +02:00
xfs_utils.h
xfs_vnodeops.c xfs: fix timestamp handling in xfs_setattr 2010-01-10 12:21:58 -06:00
xfs_vnodeops.h xfs: simplify inode teardown 2009-12-11 15:11:19 -06:00
xfs.h xfs: event tracing support 2009-12-14 23:08:16 -06:00