NFS: commit direct writes even if they fail partially
authorJ. Bruce Fields <bfields@redhat.com>
Tue, 16 Jan 2018 15:08:00 +0000 (10:08 -0500)
committerTrond Myklebust <trond.myklebust@primarydata.com>
Tue, 16 Jan 2018 15:13:23 +0000 (10:13 -0500)
commit1b8d97b0a837beaf48a8449955b52c650a7114b4
treee76a94b4ba58ce967fb1edb1763e7ee4ca18f434
parentf96adf1ea08a37e3739b1f929ce8318eee63b1f4
NFS: commit direct writes even if they fail partially

If some of the WRITE calls making up an O_DIRECT write syscall fail,
we neglect to commit, even if some of the WRITEs succeed.

We also depend on the commit code to free the reference count on the
nfs_page taken in the "if (request_commit)" case at the end of
nfs_direct_write_completion().  The problem was originally noticed
because ENOSPC's encountered partway through a write would result in a
closed file being sillyrenamed when it should have been unlinked.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
fs/nfs/direct.c