From cc77b1521d06be07c9bb1a4a3e1f775dcaa15093 Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Fri, 25 Jul 2008 01:48:55 -0700 Subject: lockd: dont return EAGAIN for a permanent error Fix nlm_fopen() to return NLM_FAILED (or NLM_LCK_DENIED_NOLOCKS) instead of NLM_LCK_DENIED. The latter means the lock request failed because of a conflicting lock (i.e. a temporary error), which is wrong in this case. Also fix the client to return ENOLCK instead of EAGAIN if a blocking lock request returns with NLM_LOCK_DENIED. Signed-off-by: Miklos Szeredi Cc: Trond Myklebust Cc: "J. Bruce Fields" Cc: Matthew Wilcox Cc: David Teigland Cc: Christoph Hellwig Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/lockd/clntproc.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'fs/lockd/clntproc.c') diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c index 1f6dc518505c..31668b690e03 100644 --- a/fs/lockd/clntproc.c +++ b/fs/lockd/clntproc.c @@ -582,7 +582,15 @@ again: } if (status < 0) goto out_unlock; - status = nlm_stat_to_errno(resp->status); + /* + * EAGAIN doesn't make sense for sleeping locks, and in some + * cases NLM_LCK_DENIED is returned for a permanent error. So + * turn it into an ENOLCK. + */ + if (resp->status == nlm_lck_denied && (fl_flags & FL_SLEEP)) + status = -ENOLCK; + else + status = nlm_stat_to_errno(resp->status); out_unblock: nlmclnt_finish_block(block); out: -- cgit v1.2.3-59-g8ed1b