[RFC PATCH 1/2] nfsd: nfserr_jukebox in nlm_fopen should lead to a retry

[Olga Kornievskaia <okorniev@redhat.com>]

When v3 NLM request finds a conflicting delegation, it triggers
a delegation recall and nfsd_open fails with EAGAIN. nfsd_open
then translates EAGAIN into nfserr_jukebox. In nlm_fopen, instead
of returning nlm_failed for when there is a conflicting delegation,
drop this NLM request so that the client retries. Once delegation
is recalled and if a local lock is claimed, a retry would lead to
nfsd returning a nlm_lck_blocked error or a successful nlm lock.

Signed-off-by: Olga Kornievskaia <okorniev@redhat.com>
---
 fs/nfsd/lockd.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/nfsd/lockd.c b/fs/nfsd/lockd.c
index edc9f75dc75c..ad3e461f30c0 100644
--- a/fs/nfsd/lockd.c
+++ b/fs/nfsd/lockd.c
@@ -57,6 +57,7 @@ nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp,
 	switch (nfserr) {
 	case nfs_ok:
 		return 0;
+	case nfserr_jukebox:
 	case nfserr_dropit:
 		return nlm_drop_reply;
 	case nfserr_stale:
-- 
2.47.1