diff options
| author | Jeff Layton <jlayton@redhat.com> | 2011-07-26 12:20:17 -0400 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2011-07-31 21:21:20 +0000 |
| commit | ad635942c869ad8fc9af270d4998c42b4e978b32 (patch) | |
| tree | b199a039df4aacd26224302b7c29193171e4d444 /fs/cifs/misc.c | |
| parent | 5980fc966bb347801f3fcc39a2ef2a1e14fbf8cb (diff) | |
cifs: simplify refcounting for oplock breaks
Currently, we take a sb->s_active reference and a cifsFileInfo reference
when an oplock break workqueue job is queued. This is unnecessary and
more complicated than it needs to be. Also as Al points out,
deactivate_super has non-trivial locking implications so it's best to
avoid that if we can.
Instead, just cancel any pending oplock breaks for this filehandle
synchronously in cifsFileInfo_put after taking it off the lists.
That should ensure that this job doesn't outlive the structures it
depends on.
Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/misc.c')
| -rw-r--r-- | fs/cifs/misc.c | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c index 03a1f491d39..7c169339259 100644 --- a/fs/cifs/misc.c +++ b/fs/cifs/misc.c @@ -585,15 +585,8 @@ is_valid_oplock_break(struct smb_hdr *buf, struct TCP_Server_Info *srv) cifs_set_oplock_level(pCifsInode, pSMB->OplockLevel ? OPLOCK_READ : 0); - /* - * cifs_oplock_break_put() can't be called - * from here. Get reference after queueing - * succeeded. cifs_oplock_break() will - * synchronize using cifs_file_list_lock. - */ - if (queue_work(system_nrt_wq, - &netfile->oplock_break)) - cifs_oplock_break_get(netfile); + queue_work(system_nrt_wq, + &netfile->oplock_break); netfile->oplock_break_cancelled = false; spin_unlock(&cifs_file_list_lock); |