NFSv4: fix open/lock state recovery error handling

The current open/lock state recovery unfortunately does not handle errors
such as NFS4ERR_CONN_NOT_BOUND_TO_SESSION correctly. Instead of looping,
just proceeds as if the state manager is finished recovering.
This patch ensures that we loop back, handle higher priority errors
and complete the open/lock state recovery.

Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

1 files changed, 6 insertions, 10 deletions

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 26d510d11efd..87b2d0e79797 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1705,7 +1705,8 @@ restart:
                         if (status < 0) {
                                 set_bit(ops->owner_flag_bit, &sp->so_flags);
                                 nfs4_put_state_owner(sp);
-                                return nfs4_recovery_handle_error(clp, status);
+                                status = nfs4_recovery_handle_error(clp, status);
+                                return (status != 0) ? status : -EAGAIN;
                         }
 
                         nfs4_put_state_owner(sp);
@@ -1714,7 +1715,7 @@ restart:
                 spin_unlock(&clp->cl_lock);
         }
         rcu_read_unlock();
-        return status;
+        return 0;
 }
 
 static int nfs4_check_lease(struct nfs_client *clp)
@@ -2365,14 +2366,11 @@ static void nfs4_state_manager(struct nfs_client *clp)
                         section = "reclaim reboot";
                         status = nfs4_do_reclaim(clp,
                                 clp->cl_mvops->reboot_recovery_ops);
-                        if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) ||
-                            test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
-                                continue;
-                        nfs4_state_end_reclaim_reboot(clp);
-                        if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state))
+                        if (status == -EAGAIN)
                                 continue;
                         if (status < 0)
                                 goto out_error;
+                        nfs4_state_end_reclaim_reboot(clp);
                 }
 
                 /* Now recover expired state... */
@@ -2380,9 +2378,7 @@ static void nfs4_state_manager(struct nfs_client *clp)
                         section = "reclaim nograce";
                         status = nfs4_do_reclaim(clp,
                                 clp->cl_mvops->nograce_recovery_ops);
-                        if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) ||
-                            test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) ||
-                            test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state))
+                        if (status == -EAGAIN)
                                 continue;
                         if (status < 0)
                                 goto out_error;