tree d1c6aa87eac0551a3d65a7bdd0a2b1bc49f4c29a
parent 74d33293e467df61de1b1d8b2fbe29e550dec33b
author Trond Myklebust <trond.myklebust@primarydata.com> 1438374270 -0400
committer Trond Myklebust <trond.myklebust@primarydata.com> 1439248093 -0400

NFSv4.1/pnfs: Fix atomicity of commit list updates

pnfs_layout_mark_request_commit() needs to ensure that it adds the
request to the commit list atomically with all the other updates
in order to prevent corruption to buckets[ds_commit_idx].wlseg
due to races with pnfs_generic_clear_request_commit().

Fixes: 338d00cfef07d ("pnfs: Refactor the *_layout_mark_request_commit...")
Cc: stable@vger.kernel.org # v4.0+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>