[PATCH 0/7] ext4 fast-commit fixes

[Eric Biggers <ebiggers@kernel.org>]

From: Eric Biggers <ebiggers@kernel.org

This series fixes several bugs in the fast-commit feature.

Patch 6 may be the most controversial patch of this series, since it
would make old kernels unable to replay fast-commit journals created by
new kernels.  I'd appreciate any thoughts on whether that's okay.  I can
drop that patch if needed.

I've tested that this series doesn't introduce any regressions with
'gce-xfstests -c ext4/fast_commit -g auto'.  Note that ext4/039,
ext4/053, and generic/475 fail both before and after.

Eric Biggers (7):
  ext4: disable fast-commit of encrypted dir operations
  ext4: don't set up encryption key during jbd2 transaction
  ext4: fix leaking uninitialized memory in fast-commit journal
  ext4: add missing validation of fast-commit record lengths
  ext4: fix unaligned memory access in ext4_fc_reserve_space()
  ext4: fix off-by-one errors in fast-commit block filling
  ext4: simplify fast-commit CRC calculation

 fs/ext4/ext4.h              |   4 +-
 fs/ext4/fast_commit.c       | 203 ++++++++++++++++++------------------
 fs/ext4/fast_commit.h       |   3 +-
 fs/ext4/namei.c             |  44 ++++----
 include/trace/events/ext4.h |   7 +-
 5 files changed, 132 insertions(+), 129 deletions(-)


base-commit: 089d1c31224e6b266ece3ee555a3ea2c9acbe5c2
-- 
2.38.1