[PATCH 3/8] nfsd: when CB_SEQUENCE gets NFS4ERR_DELAY, release the slot

[Jeff Layton <jlayton@kernel.org>]

RFC8881, 15.1.1.3 says this about NFS4ERR_DELAY:

"For any of a number of reasons, the replier could not process this
 operation in what was deemed a reasonable time. The client should wait
 and then try the request with a new slot and sequence value."

This is CB_SEQUENCE, but I believe the same rule applies. Release the
slot before submitting the delayed RPC.

Fixes: 7ba6cad6c88f ("nfsd: New helper nfsd4_cb_sequence_done() for processing more cb errors")
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/nfsd/nfs4callback.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index bfc9de1fcb67b4f05ed2f7a28038cd8290809c17..c26ccb9485b95499fc908833a384d741e966a8db 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -1392,6 +1392,7 @@ static bool nfsd4_cb_sequence_done(struct rpc_task *task, struct nfsd4_callback
 		goto need_restart;
 	case -NFS4ERR_DELAY:
 		cb->cb_seq_status = 1;
+		nfsd41_cb_release_slot(cb);
 		if (!rpc_restart_call(task))
 			goto out;
 

-- 
2.48.1