refs/heads/scrub-detect-refcount-gaps - pub/scm/linux/kernel/git/djwong/xfs-linux

commit: 9eb03e503666ade67f5a5ac40d0ee4f036b40db0
[log]
author: Darrick J. Wong <djwong@kernel.org>
Mon Mar 06 19:52:29 2023 -0800
committer: Darrick J. Wong <djwong@kernel.org>
Tue Apr 11 11:18:53 2023 -0700
tree: b8ff3b05918eb7204abec4fb34f637d82038881b
parent: 9f30d09a6fc7cc436bebc9c432553188f7999070 [diff]

xfs: ensure that all metadata and data blocks are not cow staging extents

Make sure that all filesystem metadata blocks and file data blocks are
not also marked as CoW staging extents.  The extra checking added here
was inspired by an actual VM host filesystem corruption incident due to
bugs in the CoW handling of 4.x kernels.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

fs/xfs/scrub/agheader.c[diff]
fs/xfs/scrub/alloc.c[diff]
fs/xfs/scrub/bmap.c[diff]
fs/xfs/scrub/ialloc.c[diff]
fs/xfs/scrub/inode.c[diff]
fs/xfs/scrub/refcount.c[diff]
fs/xfs/scrub/scrub.h[diff]

7 files changed

tree: b8ff3b05918eb7204abec4fb34f637d82038881b