[PATCH v3 0/3] Fixes for ENOSPC xfs_remove

[Jiachen Zhang]

Hi,

Recently, our use-case ran into 2 bugs in case doing xfs_remove when the
disk space is in-pressure, which may cause xfs shutdown and kernel crash
in the xfs log recovery procedure. Here are 2 patches to fix the
problem, and a patch adding a helper to optimize the code structure.

The 1st patch fixes an uninitialized variable issue.

The 2nd patch ensures the blkno in the xfs_buf is updated when doing
xfs_da3_swap_lastblock().

The 3rd patch adds a xfs_buf copy helper to optimize the code structure.

Changes of v2:
- directly set the *logflagsp value to make the code more robust in the
  1st commit,
- check xfs's crc-feature rather than magic in the 2nd commit, and
- fixed code style and rebased onto the master branch.

Changes of v3:
- fix code style, and
- add a new patch which does xfs_buf memcpy in a helper.

Thanks,
Jiachen


Jiachen Zhang (1):
  xfs: ensure logflagsp is initialized in xfs_bmap_del_extent_real

Zhang Tianci (2):
  xfs: update dir3 leaf block metadata after swap
  xfs: extract xfs_da_buf_copy() helper function

 fs/xfs/libxfs/xfs_attr_leaf.c | 12 ++----
 fs/xfs/libxfs/xfs_bmap.c      | 73 +++++++++++++++--------------------
 fs/xfs/libxfs/xfs_da_btree.c  | 70 +++++++++++++++------------------
 fs/xfs/libxfs/xfs_da_btree.h  |  2 +
 4 files changed, 69 insertions(+), 88 deletions(-)

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2.20.1