Changes for Linux 5.2:
- Fix some more buffer deadlocks when performing an unmount after a hard
shutdown.
- Fix some minor space accounting issues.
- Fix some use after free problems.
- Make the (undocumented) FITRIM behavior consistent with other filesystems.
- Embiggen the xfs geometry ioctl's data structure.
- Introduce a new AG geometry ioctl.
- Introduce a new online health reporting infrastructure and ioctl for
userspace to query a filesystem's health status.
- Enhance online scrub and repair to update the health reports.
- Reduce thundering herd problems when writeback io completes.
- Fix some transaction reservation type errors.
- Fix integer overflow problems with delayed alloc reservation counters.
- Fix some problems where we would exit to userspace without unlocking.
- Fix inconsistent behavior when finishing deferred ops fails.
- Strengthen scrub to check incore data against ondisk metadata.
- Remove long-broken mntpt mount option.
- Add an online scrub function for the filesystem summary counters,
which should make online metadata scrub more or less feature complete
for now.
xfs: add online scrub for superblock counters
Teach online scrub how to check the filesystem summary counters. We use
the incore delalloc block counter along with the incore AG headers to
compute expected values for fdblocks, icount, and ifree, and then check
that the percpu counter is within a certain threshold of the expected
value. This is done to avoid having to freeze or otherwise lock the
filesystem, which means that we're only checking that the counters are
fairly close, not that they're exactly correct.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
11 files changed
