This is a partial backport of original Darrick's series "xfs: logging fixes" to kernel 4.14.
It fixes the in-memory metadata corruption error, which happens
when a partially initialized attribute buffer is attemped to be written to disk.
This issue is reproducible with kernel 4.14, when adding a 1-sec sleep in xfs_attr_set(),
between the call to xfs_attr_shortform_to_leaf() and the call to xfs_attr_leaf_addname().
Darrick J. Wong (2):
xfs: add the ability to join a held buffer to a defer_ops
xfs: hold xfs_buf locked between shortform->leaf conversion and the
addition of an attribute
fs/xfs/libxfs/xfs_attr.c | 20 +++++++++++++++-----
fs/xfs/libxfs/xfs_attr_leaf.c | 9 ++++++---
fs/xfs/libxfs/xfs_attr_leaf.h | 3 ++-
fs/xfs/libxfs/xfs_defer.c | 39 ++++++++++++++++++++++++++++++++++++---
fs/xfs/libxfs/xfs_defer.h | 5 ++++-
5 files changed, 63 insertions(+), 13 deletions(-)
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1.9.1
