NFSv4: Add debugging printks to state manager

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index dfedde6f2a71..c679b9ecef63 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1108,6 +1108,8 @@ void nfs4_schedule_lease_recovery(struct nfs_client *clp)
                 return;
         if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
                 set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state);
+        dprintk("%s: scheduling lease recovery for server %s\n", __func__,
+                        clp->cl_hostname);
         nfs4_schedule_state_manager(clp);
 }
 EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery);
@@ -1124,6 +1126,8 @@ static void nfs40_handle_cb_pathdown(struct nfs_client *clp)
 {
         set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
         nfs_expire_all_delegations(clp);
+        dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__,
+                        clp->cl_hostname);
 }
 
 void nfs4_schedule_path_down_recovery(struct nfs_client *clp)
@@ -1160,6 +1164,8 @@ void nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4
         struct nfs_client *clp = server->nfs_client;
 
         nfs4_state_mark_reclaim_nograce(clp, state);
+        dprintk("%s: scheduling stateid recovery for server %s\n", __func__,
+                        clp->cl_hostname);
         nfs4_schedule_state_manager(clp);
 }
 EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery);
@@ -1506,8 +1512,12 @@ static int nfs4_recovery_handle_error(struct nfs_client *clp, int error)
                         nfs4_warn_keyexpired(clp->cl_hostname);
                         break;
                 default:
+                        dprintk("%s: failed to handle error %d for server %s\n",
+                                        __func__, error, clp->cl_hostname);
                         return error;
         }
+        dprintk("%s: handled error %d for server %s\n", __func__, error,
+                        clp->cl_hostname);
         return 0;
 }
 
@@ -1605,15 +1615,21 @@ static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status)
         case -NFS4ERR_MINOR_VERS_MISMATCH:
                 if (clp->cl_cons_state == NFS_CS_SESSION_INITING)
                         nfs_mark_client_ready(clp, -EPROTONOSUPPORT);
+                dprintk("%s: exit with error %d for server %s\n",
+                                __func__, -EPROTONOSUPPORT, clp->cl_hostname);
                 return -EPROTONOSUPPORT;
         case -EKEYEXPIRED:
                 nfs4_warn_keyexpired(clp->cl_hostname);
         case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery
                                  * in nfs4_exchange_id */
         default:
+                dprintk("%s: exit with error %d for server %s\n", __func__,
+                                status, clp->cl_hostname);
                 return status;
         }
         set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
+        dprintk("%s: handled error %d for server %s\n", __func__, status,
+                        clp->cl_hostname);
         return 0;
 }
 
@@ -1653,6 +1669,8 @@ EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery);
 void nfs41_handle_recall_slot(struct nfs_client *clp)
 {
         set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state);
+        dprintk("%s: scheduling slot recall for server %s\n", __func__,
+                        clp->cl_hostname);
         nfs4_schedule_state_manager(clp);
 }
 
@@ -1662,6 +1680,8 @@ static void nfs4_reset_all_state(struct nfs_client *clp)
                 set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state);
                 clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state);
                 nfs4_state_start_reclaim_nograce(clp);
+                dprintk("%s: scheduling reset of all state for server %s!\n",
+                                __func__, clp->cl_hostname);
                 nfs4_schedule_state_manager(clp);
         }
 }
@@ -1670,6 +1690,8 @@ static void nfs41_handle_server_reboot(struct nfs_client *clp)
 {
         if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) {
                 nfs4_state_start_reclaim_reboot(clp);
+                dprintk("%s: server %s rebooted!\n", __func__,
+                                clp->cl_hostname);
                 nfs4_schedule_state_manager(clp);
         }
 }
@@ -1677,12 +1699,15 @@ static void nfs41_handle_server_reboot(struct nfs_client *clp)
 static void nfs41_handle_state_revoked(struct nfs_client *clp)
 {
         nfs4_reset_all_state(clp);
+        dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname);
 }
 
 static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp)
 {
         /* This will need to handle layouts too */
         nfs_expire_all_delegations(clp);
+        dprintk("%s: Recallable state revoked on server %s!\n", __func__,
+                        clp->cl_hostname);
 }
 
 static void nfs41_handle_backchannel_fault(struct nfs_client *clp)
@@ -1690,6 +1715,8 @@ static void nfs41_handle_backchannel_fault(struct nfs_client *clp)
         nfs_expire_all_delegations(clp);
         if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0)
                 nfs4_schedule_state_manager(clp);
+        dprintk("%s: server %s declared a backchannel fault\n", __func__,
+                        clp->cl_hostname);
 }
 
 static void nfs41_handle_cb_path_down(struct nfs_client *clp)
@@ -1740,6 +1767,8 @@ static int nfs4_reset_session(struct nfs_client *clp)
         memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN);
         status = nfs4_proc_create_session(clp, cred);
         if (status) {
+                dprintk("%s: session reset failed with status %d for server %s!\n",
+                        __func__, status, clp->cl_hostname);
                 status = nfs4_handle_reclaim_lease_error(clp, status);
                 goto out;
         }
@@ -1747,6 +1776,8 @@ static int nfs4_reset_session(struct nfs_client *clp)
         /* create_session negotiated new slot table */
         clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state);
         clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state);
+        dprintk("%s: session reset was successful for server %s!\n",
+                        __func__, clp->cl_hostname);
 
          /* Let the state manager reestablish state */
         if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
@@ -1798,6 +1829,8 @@ static int nfs4_bind_conn_to_session(struct nfs_client *clp)
         clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state);
         switch (ret) {
         case 0:
+                dprintk("%s: bind_conn_to_session was successful for server %s!\n",
+                        __func__, clp->cl_hostname);
                 break;
         case -NFS4ERR_DELAY:
                 ssleep(1);