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| author | Sage Weil <sage@redhat.com> | 2014-09-26 19:30:06 +0400 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2014-10-04 03:14:59 +0400 |
| commit | 42383020beb1cfb05f5d330cc311931bc4917a97 (patch) | |
| tree | 08e2411cd332c3c56323ac9ffc27164079e29daf /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 656f30dba7ab8179c9a2e04293b0c7b383fa9ce9 (diff) | |
| download | linux-42383020beb1cfb05f5d330cc311931bc4917a97.tar.xz | |
Btrfs: fix race in WAIT_SYNC ioctl
We check whether transid is already committed via last_trans_committed and
then search through trans_list for pending transactions. If
last_trans_committed is updated by btrfs_commit_transaction after we check
it (there is no locking), we will fail to find the committed transaction
and return EINVAL to the caller. This has been observed occasionally by
ceph-osd (which uses this ioctl heavily).
Fix by rechecking whether the provided transid <= last_trans_committed
after the search fails, and if so return 0.
Signed-off-by: Sage Weil <sage@redhat.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions