NFSv4: fix open/lock state recovery error handling

commit df817ba35736db2d62b07de6f050a4db53492ad8 upstream.

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.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 0e73bff6867ff0d61751249c1bcaa5c1fd720acf..d482b86d0e0bcfff249d5bb57517632152cc01a4 100644 (file)
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1699,7 +1699,8 @@ 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);
@@ -1708,7 +1709,7 @@ restart:
                spin_unlock(&clp->cl_lock);
        }
        rcu_read_unlock();
-       return status;
+       return 0;
 }
 
 static int nfs4_check_lease(struct nfs_client *clp)
@@ -2173,14 +2174,11 @@ 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... */
@@ -2188,9 +2186,7 @@ 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;