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authorMiklos Szeredi <mszeredi@suse.cz>2008-07-25 01:48:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-25 10:53:47 -0700
commitcc77b1521d06be07c9bb1a4a3e1f775dcaa15093 (patch)
treeb8089e3276d19ba6ab9ecd5ca7ddef7b62df4a7f
parentb81f3ea92ba1fa676775677679889dc2a7f03c8b (diff)
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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 <mszeredi@suse.cz> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Matthew Wilcox <matthew@wil.cx> Cc: David Teigland <teigland@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/lockd/clntproc.c10
-rw-r--r--fs/nfsd/lockd.c13
2 files changed, 18 insertions, 5 deletions
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:
diff --git a/fs/nfsd/lockd.c b/fs/nfsd/lockd.c
index 6b6225ac4926..15c6faeec77c 100644
--- a/fs/nfsd/lockd.c
+++ b/fs/nfsd/lockd.c
@@ -19,6 +19,13 @@
#define NFSDDBG_FACILITY NFSDDBG_LOCKD
+#ifdef CONFIG_LOCKD_V4
+#define nlm_stale_fh nlm4_stale_fh
+#define nlm_failed nlm4_failed
+#else
+#define nlm_stale_fh nlm_lck_denied_nolocks
+#define nlm_failed nlm_lck_denied_nolocks
+#endif
/*
* Note: we hold the dentry use count while the file is open.
*/
@@ -47,12 +54,10 @@ nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp)
return 0;
case nfserr_dropit:
return nlm_drop_reply;
-#ifdef CONFIG_LOCKD_V4
case nfserr_stale:
- return nlm4_stale_fh;
-#endif
+ return nlm_stale_fh;
default:
- return nlm_lck_denied;
+ return nlm_failed;
}
}