NFSv4: Add debugging printks to state manager

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

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);