[PATCH 4.4 005/190] NFSv4.1: RECLAIM_COMPLETE must handle NFS4ERR_CONN_NOT_BOUND_TO_SESSION

[Greg Kroah-Hartman]

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Trond Myklebust <trond.mykleb...@primarydata.com>


[ 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 <chuck.le...@oracle.com>
Signed-off-by: Trond Myklebust <trond.mykleb...@primarydata.com>
Tested-by: Chuck Lever <chuck.le...@oracle.com>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 fs/nfs/nfs4proc.c  |    7 ++++++-
 fs/nfs/nfs4state.c |   10 +++++++---
 2 files changed, 13 insertions(+), 4 deletions(-)

--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -7670,6 +7670,12 @@ 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);
        }
@@ -7748,7 +7754,6 @@ 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;
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1593,13 +1593,14 @@ 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)
@@ -1646,13 +1647,16 @@ 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 nfs_delegation_clear_all(struct nfs_client *clp)