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xfs: retain ILOCK during directory updates [v13.2 16/16]

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This series changes the directory update code to retain the ILOCK on all
 files involved in a rename until the end of the operation.  The upcoming
 parent pointers patchset applies parent pointers in a separate chained
 update from the actual directory update, which is why it is now
 necessary to keep the ILOCK instead of dropping it after the first
 transaction in the chain.
 
 As a side effect, we no longer need to hold the IOLOCK during an rmapbt
 scan of inodes to serialize the scan with ongoing directory updates.
 
 This has been running on the djcloud for months with no problems.  Enjoy!
 
 Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Merge tag 'retain-ilock-during-dir-ops-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeA

xfs: retain ILOCK during directory updates

This series changes the directory update code to retain the ILOCK on all
files involved in a rename until the end of the operation.  The upcoming
parent pointers patchset applies parent pointers in a separate chained
update from the actual directory update, which is why it is now
necessary to keep the ILOCK instead of dropping it after the first
transaction in the chain.

As a side effect, we no longer need to hold the IOLOCK during an rmapbt
scan of inodes to serialize the scan with ongoing directory updates.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>

* tag 'retain-ilock-during-dir-ops-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux:
  xfs: unlock new repair tempfiles after creation
  xfs: don't pick up IOLOCK during rmapbt repair scan
  xfs: Hold inode locks in xfs_rename
  xfs: Hold inode locks in xfs_trans_alloc_dir
  xfs: Hold inode locks in xfs_ialloc
  xfs: Increase XFS_QM_TRANS_MAXDQS to 5
  xfs: Increase XFS_DEFER_OPS_NR_INODES to 5
This commit is contained in:
Chandan Babu R 2024-04-16 12:53:08 +05:30
commit 9cb5f15d88
13 changed files with 156 additions and 54 deletions
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