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[0/2] btrfs: some fiemap fixes

Message ID cover.1708635463.git.fdmanana@suse.com (mailing list archive)
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Series btrfs: some fiemap fixes | expand

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Filipe Manana Feb. 23, 2024, 8:08 a.m. UTC 
From: Filipe Manana <fdmanana@suse.com>

There's a recent regression with fiemap due to a fix for a deadlock between
fiemap and memory mapped writes when the fiemap buffer is memory mapped to
the same file range, which leads to a race triggering a warning and making
fiemap fail. Plus one more long standing race when using FIEMAP_FLAG_SYNC.
Details in the change logs.

Filipe Manana (2):
  btrfs: fix race between ordered extent completion and fiemap
  btrfs: ensure fiemap doesn't race with writes when FIEMAP_FLAG_SYNC is given

 fs/btrfs/extent_io.c | 50 +++++++++++++++++++++++++++-----------------
 fs/btrfs/inode.c     | 22 ++++++++++++++++++-
 2 files changed, 52 insertions(+), 20 deletions(-)