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Patch "NFSv4.1: RECLAIM_COMPLETE must handle NFS4ERR_CONN_NOT_BOUND_TO_SESSION" has been added to the 4.9-stable tree

PATCH [email protected] 1 participant 1 message Apr 9, 2018

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This is a note to let you know that I've just added the patch titled

NFSv4.1: RECLAIM_COMPLETE must handle NFS4ERR_CONN_NOT_BOUND_TO_SESSION

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
nfsv4.1-reclaim_complete-must-handle-nfs4err_conn_not_bound_to_session.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From foo@baz Mon Apr 9 17:09:24 CEST 2018

From: Trond Myklebust <[email protected]>
Date: Thu, 4 May 2017 13:44:04 -0400
Subject: NFSv4.1: RECLAIM_COMPLETE must handle NFS4ERR_CONN_NOT_BOUND_TO_SESSION

From: Trond Myklebust <[email protected]>

[ Upstream commit 0048fdd06614a4ea088f9fcad11511956b795698 ]

If the server returns NFS4ERR_CONN_NOT_BOUND_TO_SESSION because we are trunking, then RECLAIM_COMPLETE must handle that by calling nfs4_schedule_session_recovery() and then retrying.

Reported-by Chuck Lever <[email protected]>
Signed-off-by Trond Myklebust <[email protected]>
Tested-by Chuck Lever <[email protected]>
Signed-off-by Sasha Levin <[email protected]>
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 fs/nfs/nfs4proc.c  |    7 ++++++-
 fs/nfs/nfs4state.c |   10 +++++++---
 2 files changed, 13 insertions(+), 4 deletions(-)
fs/nfs/nfs4proc.c +6 -1
@@ -8173,6 +8173,12 @@ static int nfs41_reclaim_complete_handle
 		/* fall through */
 	case -NFS4ERR_RETRY_UNCACHED_REP:
 		return -EAGAIN;
+	case -NFS4ERR_BADSESSION:
+	case -NFS4ERR_DEADSESSION:
+	case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
+		nfs4_schedule_session_recovery(clp->cl_session,
+				task->tk_status);
+		break;
 	default:
 		nfs4_schedule_lease_recovery(clp);
 	}

@@ -8251,7 +8257,6 @@ static int nfs41_proc_reclaim_complete(s
 	if (status == 0)
 		status = task->tk_status;
 	rpc_put_task(task);
-	return 0;
 out:
 	dprintk("<-- %s status=%d\n", __func__, status);
 	return status;
fs/nfs/nfs4state.c +7 -3
@@ -1637,13 +1637,14 @@ static void nfs4_state_start_reclaim_reb
 	nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot);
 }
 
-static void nfs4_reclaim_complete(struct nfs_client *clp,
+static int nfs4_reclaim_complete(struct nfs_client *clp,
 				 const struct nfs4_state_recovery_ops *ops,
 				 struct rpc_cred *cred)
 {
 	/* Notify the server we're done reclaiming our state */
 	if (ops->reclaim_complete)
-		(void)ops->reclaim_complete(clp, cred);
+		return ops->reclaim_complete(clp, cred);
+	return 0;
 }
 
 static void nfs4_clear_reclaim_server(struct nfs_server *server)

@@ -1690,13 +1691,16 @@ static void nfs4_state_end_reclaim_reboo
 {
 	const struct nfs4_state_recovery_ops *ops;
 	struct rpc_cred *cred;
+	int err;
 
 	if (!nfs4_state_clear_reclaim_reboot(clp))
 		return;
 	ops = clp->cl_mvops->reboot_recovery_ops;
 	cred = nfs4_get_clid_cred(clp);
-	nfs4_reclaim_complete(clp, ops, cred);
+	err = nfs4_reclaim_complete(clp, ops, cred);
 	put_rpccred(cred);
+	if (err == -NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
+		set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state);
 }
 
 static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp)

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/pnfs-flexfiles-missing-error-code-in-ff_layout_alloc_lseg.patch queue-4.9/nfsv4.1-work-around-a-linux-server-bug.patch queue-4.9/sunrpc-ensure-correct-error-is-reported-by-xs_tcp_setup_socket.patch queue-4.9/nfsv4.1-reclaim_complete-must-handle-nfs4err_conn_not_bound_to_session.patch