Fix: rotation_unavailable returned on failure to read time
[lttng-tools.git] / src / bin / lttng-sessiond / cmd.c
index 4d4d0088cf8299ed7859c5b1558d4db0aac644f9..1ac133f3606d68d3114bb6405f103d89f30851ea 100644 (file)
@@ -954,19 +954,20 @@ error:
  * Create a socket to the relayd using the URI.
  *
  * On success, the relayd_sock pointer is set to the created socket.
- * Else, it's stays untouched and a lttcomm error code is returned.
+ * Else, it remains untouched and an LTTng error code is returned.
  */
-static int create_connect_relayd(struct lttng_uri *uri,
+static enum lttng_error_code create_connect_relayd(struct lttng_uri *uri,
                struct lttcomm_relayd_sock **relayd_sock,
                struct consumer_output *consumer)
 {
        int ret;
+       enum lttng_error_code status = LTTNG_OK;
        struct lttcomm_relayd_sock *rsock;
 
        rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR,
                        RELAYD_VERSION_COMM_MINOR);
        if (!rsock) {
-               ret = LTTNG_ERR_FATAL;
+               status = LTTNG_ERR_FATAL;
                goto error;
        }
 
@@ -980,7 +981,7 @@ static int create_connect_relayd(struct lttng_uri *uri,
        health_poll_exit();
        if (ret < 0) {
                ERR("Unable to reach lttng-relayd");
-               ret = LTTNG_ERR_RELAYD_CONNECT_FAIL;
+               status = LTTNG_ERR_RELAYD_CONNECT_FAIL;
                goto free_sock;
        }
 
@@ -991,10 +992,11 @@ static int create_connect_relayd(struct lttng_uri *uri,
                /* Check relayd version */
                ret = relayd_version_check(rsock);
                if (ret == LTTNG_ERR_RELAYD_VERSION_FAIL) {
+                       status = LTTNG_ERR_RELAYD_VERSION_FAIL;
                        goto close_sock;
                } else if (ret < 0) {
                        ERR("Unable to reach lttng-relayd");
-                       ret = LTTNG_ERR_RELAYD_CONNECT_FAIL;
+                       status = LTTNG_ERR_RELAYD_CONNECT_FAIL;
                        goto close_sock;
                }
                consumer->relay_major_version = rsock->major;
@@ -1004,13 +1006,13 @@ static int create_connect_relayd(struct lttng_uri *uri,
        } else {
                /* Command is not valid */
                ERR("Relayd invalid stream type: %d", uri->stype);
-               ret = LTTNG_ERR_INVALID;
+               status = LTTNG_ERR_INVALID;
                goto close_sock;
        }
 
        *relayd_sock = rsock;
 
-       return LTTNG_OK;
+       return status;
 
 close_sock:
        /* The returned value is not useful since we are on an error path. */
@@ -1018,15 +1020,18 @@ close_sock:
 free_sock:
        free(rsock);
 error:
-       return ret;
+       return status;
 }
 
 /*
  * Connect to the relayd using URI and send the socket to the right consumer.
  *
  * The consumer socket lock must be held by the caller.
+ *
+ * Returns LTTNG_OK on success or an LTTng error code on failure.
  */
-static int send_consumer_relayd_socket(unsigned int session_id,
+static enum lttng_error_code send_consumer_relayd_socket(
+               unsigned int session_id,
                struct lttng_uri *relayd_uri,
                struct consumer_output *consumer,
                struct consumer_socket *consumer_sock,
@@ -1034,10 +1039,11 @@ static int send_consumer_relayd_socket(unsigned int session_id,
 {
        int ret;
        struct lttcomm_relayd_sock *rsock = NULL;
+       enum lttng_error_code status;
 
        /* Connect to relayd and make version check if uri is the control. */
-       ret = create_connect_relayd(relayd_uri, &rsock, consumer);
-       if (ret != LTTNG_OK) {
+       status = create_connect_relayd(relayd_uri, &rsock, consumer);
+       if (status != LTTNG_OK) {
                goto relayd_comm_error;
        }
        assert(rsock);
@@ -1059,7 +1065,7 @@ static int send_consumer_relayd_socket(unsigned int session_id,
                        relayd_uri->stype, session_id,
                        session_name, hostname, session_live_timer);
        if (ret < 0) {
-               ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL;
+               status = LTTNG_ERR_ENABLE_CONSUMER_FAIL;
                goto close_sock;
        }
 
@@ -1070,15 +1076,13 @@ static int send_consumer_relayd_socket(unsigned int session_id,
                consumer_sock->data_sock_sent = 1;
        }
 
-       ret = LTTNG_OK;
-
        /*
         * Close socket which was dup on the consumer side. The session daemon does
         * NOT keep track of the relayd socket(s) once transfer to the consumer.
         */
 
 close_sock:
-       if (ret != LTTNG_OK) {
+       if (status != LTTNG_OK) {
                /*
                 * The consumer output for this session should not be used anymore
                 * since the relayd connection failed thus making any tracing or/and
@@ -1090,7 +1094,7 @@ close_sock:
        free(rsock);
 
 relayd_comm_error:
-       return ret;
+       return status;
 }
 
 /*
@@ -1099,39 +1103,42 @@ relayd_comm_error:
  * session.
  *
  * The consumer socket lock must be held by the caller.
+ *
+ * Returns LTTNG_OK, or an LTTng error code on failure.
  */
-static int send_consumer_relayd_sockets(enum lttng_domain_type domain,
+static enum lttng_error_code send_consumer_relayd_sockets(
+               enum lttng_domain_type domain,
                unsigned int session_id, struct consumer_output *consumer,
                struct consumer_socket *sock, char *session_name,
                char *hostname, int session_live_timer)
 {
-       int ret = LTTNG_OK;
+       enum lttng_error_code status = LTTNG_OK;
 
        assert(consumer);
        assert(sock);
 
        /* Sending control relayd socket. */
        if (!sock->control_sock_sent) {
-               ret = send_consumer_relayd_socket(session_id,
+               status = send_consumer_relayd_socket(session_id,
                                &consumer->dst.net.control, consumer, sock,
                                session_name, hostname, session_live_timer);
-               if (ret != LTTNG_OK) {
+               if (status != LTTNG_OK) {
                        goto error;
                }
        }
 
        /* Sending data relayd socket. */
        if (!sock->data_sock_sent) {
-               ret = send_consumer_relayd_socket(session_id,
+               status = send_consumer_relayd_socket(session_id,
                                &consumer->dst.net.data, consumer, sock,
                                session_name, hostname, session_live_timer);
-               if (ret != LTTNG_OK) {
+               if (status != LTTNG_OK) {
                        goto error;
                }
        }
 
 error:
-       return ret;
+       return status;
 }
 
 /*
@@ -2725,7 +2732,7 @@ int cmd_stop_trace(struct ltt_session *session)
        struct ltt_kernel_channel *kchan;
        struct ltt_kernel_session *ksession;
        struct ltt_ust_session *usess;
-       bool error_occured = false;
+       bool error_occurred = false;
 
        assert(session);
 
@@ -2762,7 +2769,7 @@ int cmd_stop_trace(struct ltt_session *session)
                         * This error should not prevent the user from stopping
                         * the session. However, it will be reported at the end.
                         */
-                       error_occured = true;
+                       error_occurred = true;
                }
        }
 
@@ -2815,7 +2822,7 @@ int cmd_stop_trace(struct ltt_session *session)
 
        /* Flag inactive after a successful stop. */
        session->active = 0;
-       ret = !error_occured ? LTTNG_OK : LTTNG_ERR_UNK;
+       ret = !error_occurred ? LTTNG_OK : LTTNG_ERR_UNK;
 
 error:
        return ret;
@@ -2903,39 +2910,31 @@ int cmd_create_session_uri(char *name, struct lttng_uri *uris,
                size_t nb_uri, lttng_sock_cred *creds, unsigned int live_timer)
 {
        int ret;
-       struct ltt_session *session;
+       struct ltt_session *session = NULL;
 
        assert(name);
        assert(creds);
 
-       /*
-        * Verify if the session already exist
-        *
-        * XXX: There is no need for the session lock list here since the caller
-        * (process_client_msg) is holding it. We might want to change that so a
-        * single command does not lock the entire session list.
-        */
+       /* Check if the session already exists. */
+       session_lock_list();
        session = session_find_by_name(name);
+       session_unlock_list();
        if (session != NULL) {
                ret = LTTNG_ERR_EXIST_SESS;
-               goto find_error;
+               goto end;
        }
 
        /* Create tracing session in the registry */
        ret = session_create(name, LTTNG_SOCK_GET_UID_CRED(creds),
                        LTTNG_SOCK_GET_GID_CRED(creds));
        if (ret != LTTNG_OK) {
-               goto session_error;
+               goto end;
        }
 
-       /*
-        * Get the newly created session pointer back
-        *
-        * XXX: There is no need for the session lock list here since the caller
-        * (process_client_msg) is holding it. We might want to change that so a
-        * single command does not lock the entire session list.
-        */
+       /* Get the newly created session pointer back. */
+       session_lock_list();
        session = session_find_by_name(name);
+       session_unlock_list();
        assert(session);
 
        session->live_timer = live_timer;
@@ -2943,13 +2942,13 @@ int cmd_create_session_uri(char *name, struct lttng_uri *uris,
        session->consumer = consumer_create_output(CONSUMER_DST_LOCAL);
        if (session->consumer == NULL) {
                ret = LTTNG_ERR_FATAL;
-               goto consumer_error;
+               goto end;
        }
 
        if (uris) {
                ret = cmd_set_consumer_uri(session, nb_uri, uris);
                if (ret != LTTNG_OK) {
-                       goto consumer_error;
+                       goto end;
                }
                session->output_traces = 1;
        } else {
@@ -2959,12 +2958,13 @@ int cmd_create_session_uri(char *name, struct lttng_uri *uris,
 
        session->consumer->enabled = 1;
 
-       return LTTNG_OK;
-
-consumer_error:
-       session_destroy(session);
-session_error:
-find_error:
+       ret = LTTNG_OK;
+end:
+       if (session) {
+               session_lock_list();
+               session_put(session);
+               session_unlock_list();
+       }
        return ret;
 }
 
@@ -2975,7 +2975,7 @@ int cmd_create_session_snapshot(char *name, struct lttng_uri *uris,
                size_t nb_uri, lttng_sock_cred *creds)
 {
        int ret;
-       struct ltt_session *session;
+       struct ltt_session *session = NULL;
        struct snapshot_output *new_output = NULL;
 
        assert(name);
@@ -2987,11 +2987,13 @@ int cmd_create_session_snapshot(char *name, struct lttng_uri *uris,
         */
        ret = cmd_create_session_uri(name, NULL, 0, creds, 0);
        if (ret != LTTNG_OK) {
-               goto error;
+               goto end;
        }
 
        /* Get the newly created session pointer back. This should NEVER fail. */
+       session_lock_list();
        session = session_find_by_name(name);
+       session_unlock_list();
        assert(session);
 
        /* Flag session for snapshot mode. */
@@ -2999,6 +3001,7 @@ int cmd_create_session_snapshot(char *name, struct lttng_uri *uris,
 
        /* Skip snapshot output creation if no URI is given. */
        if (nb_uri == 0) {
+               /* Not an error. */
                goto end;
        }
 
@@ -3023,14 +3026,18 @@ int cmd_create_session_snapshot(char *name, struct lttng_uri *uris,
        snapshot_add_output(&session->snapshot, new_output);
        rcu_read_unlock();
 
-end:
-       return LTTNG_OK;
+       ret = LTTNG_OK;
+       goto end;
 
 error_snapshot:
        snapshot_output_destroy(new_output);
 error_snapshot_alloc:
-       session_destroy(session);
-error:
+end:
+       if (session) {
+               session_lock_list();
+               session_put(session);
+               session_unlock_list();
+       }
        return ret;
 }
 
@@ -3039,19 +3046,14 @@ error:
  *
  * Called with session lock held.
  */
-int cmd_destroy_session(struct ltt_session *session, int wpipe,
+int cmd_destroy_session(struct ltt_session *session,
                struct notification_thread_handle *notification_thread_handle)
 {
        int ret;
-       struct ltt_ust_session *usess;
-       struct ltt_kernel_session *ksess;
 
        /* Safety net */
        assert(session);
 
-       usess = session->ust_session;
-       ksess = session->kernel_session;
-
        DBG("Begin destroy session %s (id %" PRIu64 ")", session->name, session->id);
 
        if (session->rotation_pending_check_timer_enabled) {
@@ -3083,33 +3085,6 @@ int cmd_destroy_session(struct ltt_session *session, int wpipe,
                rename_active_chunk(session);
        }
 
-       /* Clean kernel session teardown */
-       kernel_destroy_session(ksess);
-
-       /* UST session teardown */
-       if (usess) {
-               /* Close any relayd session */
-               consumer_output_send_destroy_relayd(usess->consumer);
-
-               /* Destroy every UST application related to this session. */
-               ret = ust_app_destroy_trace_all(usess);
-               if (ret) {
-                       ERR("Error in ust_app_destroy_trace_all");
-               }
-
-               /* Clean up the rest. */
-               trace_ust_destroy_session(usess);
-       }
-
-       /*
-        * Must notify the kernel thread here to update it's poll set in order to
-        * remove the channel(s)' fd just destroyed.
-        */
-       ret = notify_thread_pipe(wpipe);
-       if (ret < 0) {
-               PERROR("write kernel poll pipe");
-       }
-
        if (session->shm_path[0]) {
                /*
                 * When a session is created with an explicit shm_path,
@@ -3163,7 +3138,14 @@ int cmd_destroy_session(struct ltt_session *session, int wpipe,
                                sizeof(destroy_completion_handler.shm_path));
                assert(!ret);
        }
-       ret = session_destroy(session);
+
+       /*
+        * The session is destroyed. However, note that the command context
+        * still holds a reference to the session, thus delaying its destruction
+        * _at least_ up to the point when that reference is released.
+        */
+       session_destroy(session);
+       ret = LTTNG_OK;
 
        return ret;
 }
@@ -3468,10 +3450,15 @@ void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid,
         * the buffer.
         */
        cds_list_for_each_entry(session, &list->head, list) {
+               if (!session_get(session)) {
+                       continue;
+               }
                /*
                 * Only list the sessions the user can control.
                 */
-               if (!session_access_ok(session, uid, gid)) {
+               if (!session_access_ok(session, uid, gid) ||
+                               session->destroyed) {
+                       session_put(session);
                        continue;
                }
 
@@ -3489,6 +3476,7 @@ void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid,
                }
                if (ret < 0) {
                        PERROR("snprintf session path");
+                       session_put(session);
                        continue;
                }
 
@@ -3498,6 +3486,7 @@ void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid,
                sessions[i].snapshot_mode = session->snapshot_mode;
                sessions[i].live_timer_interval = session->live_timer;
                i++;
+               session_put(session);
        }
 }
 
@@ -4093,12 +4082,14 @@ end:
  * Send relayd sockets from snapshot output to consumer. Ignore request if the
  * snapshot output is *not* set with a remote destination.
  *
- * Return 0 on success or a LTTNG_ERR code.
+ * Return LTTNG_OK on success or a LTTNG_ERR code.
  */
-static int set_relayd_for_snapshot(struct consumer_output *consumer,
-               struct snapshot_output *snap_output, struct ltt_session *session)
+static enum lttng_error_code set_relayd_for_snapshot(
+               struct consumer_output *consumer,
+               struct snapshot_output *snap_output,
+               struct ltt_session *session)
 {
-       int ret = LTTNG_OK;
+       enum lttng_error_code status = LTTNG_OK;
        struct lttng_ht_iter iter;
        struct consumer_socket *socket;
 
@@ -4121,12 +4112,12 @@ static int set_relayd_for_snapshot(struct consumer_output *consumer,
        cds_lfht_for_each_entry(snap_output->consumer->socks->ht, &iter.iter,
                        socket, node.node) {
                pthread_mutex_lock(socket->lock);
-               ret = send_consumer_relayd_sockets(0, session->id,
+               status = send_consumer_relayd_sockets(0, session->id,
                                snap_output->consumer, socket,
                                session->name, session->hostname,
                                session->live_timer);
                pthread_mutex_unlock(socket->lock);
-               if (ret != LTTNG_OK) {
+               if (status != LTTNG_OK) {
                        rcu_read_unlock();
                        goto error;
                }
@@ -4134,7 +4125,7 @@ static int set_relayd_for_snapshot(struct consumer_output *consumer,
        rcu_read_unlock();
 
 error:
-       return ret;
+       return status;
 }
 
 /*
@@ -4142,38 +4133,37 @@ error:
  *
  * Return LTTNG_OK on success or a LTTNG_ERR code.
  */
-static int record_kernel_snapshot(struct ltt_kernel_session *ksess,
+static enum lttng_error_code record_kernel_snapshot(struct ltt_kernel_session *ksess,
                struct snapshot_output *output, struct ltt_session *session,
                int wait, uint64_t nb_packets_per_stream)
 {
        int ret;
+       enum lttng_error_code status;
 
        assert(ksess);
        assert(output);
        assert(session);
 
-
        /*
         * Copy kernel session sockets so we can communicate with the right
         * consumer for the snapshot record command.
         */
        ret = consumer_copy_sockets(output->consumer, ksess->consumer);
        if (ret < 0) {
-               ret = LTTNG_ERR_NOMEM;
+               status = LTTNG_ERR_NOMEM;
                goto error;
        }
 
-       ret = set_relayd_for_snapshot(ksess->consumer, output, session);
-       if (ret != LTTNG_OK) {
+       status = set_relayd_for_snapshot(ksess->consumer, output, session);
+       if (status != LTTNG_OK) {
                goto error_snapshot;
        }
 
-       ret = kernel_snapshot_record(ksess, output, wait, nb_packets_per_stream);
-       if (ret != LTTNG_OK) {
+       status = kernel_snapshot_record(ksess, output, wait, nb_packets_per_stream);
+       if (status != LTTNG_OK) {
                goto error_snapshot;
        }
 
-       ret = LTTNG_OK;
        goto end;
 
 error_snapshot:
@@ -4181,19 +4171,20 @@ error_snapshot:
        consumer_destroy_output_sockets(output->consumer);
 error:
 end:
-       return ret;
+       return status;
 }
 
 /*
  * Record a UST snapshot.
  *
- * Return 0 on success or a LTTNG_ERR error code.
+ * Returns LTTNG_OK on success or a LTTNG_ERR error code.
  */
-static int record_ust_snapshot(struct ltt_ust_session *usess,
+static enum lttng_error_code record_ust_snapshot(struct ltt_ust_session *usess,
                struct snapshot_output *output, struct ltt_session *session,
                int wait, uint64_t nb_packets_per_stream)
 {
        int ret;
+       enum lttng_error_code status;
 
        assert(usess);
        assert(output);
@@ -4205,35 +4196,25 @@ static int record_ust_snapshot(struct ltt_ust_session *usess,
         */
        ret = consumer_copy_sockets(output->consumer, usess->consumer);
        if (ret < 0) {
-               ret = LTTNG_ERR_NOMEM;
+               status = LTTNG_ERR_NOMEM;
                goto error;
        }
 
-       ret = set_relayd_for_snapshot(usess->consumer, output, session);
-       if (ret != LTTNG_OK) {
+       status = set_relayd_for_snapshot(usess->consumer, output, session);
+       if (status != LTTNG_OK) {
                goto error_snapshot;
        }
 
-       ret = ust_app_snapshot_record(usess, output, wait, nb_packets_per_stream);
-       if (ret < 0) {
-               switch (-ret) {
-               case EINVAL:
-                       ret = LTTNG_ERR_INVALID;
-                       break;
-               default:
-                       ret = LTTNG_ERR_SNAPSHOT_FAIL;
-                       break;
-               }
+       status = ust_app_snapshot_record(usess, output, wait, nb_packets_per_stream);
+       if (status != LTTNG_OK) {
                goto error_snapshot;
        }
 
-       ret = LTTNG_OK;
-
 error_snapshot:
        /* Clean up copied sockets so this output can use some other later on. */
        consumer_destroy_output_sockets(output->consumer);
 error:
-       return ret;
+       return status;
 }
 
 static
@@ -4333,7 +4314,8 @@ int64_t get_session_nb_packets_per_stream(struct ltt_session *session, uint64_t
 int cmd_snapshot_record(struct ltt_session *session,
                struct lttng_snapshot_output *output, int wait)
 {
-       int ret = LTTNG_OK;
+       enum lttng_error_code cmd_ret = LTTNG_OK;
+       int ret;
        unsigned int use_tmp_output = 0;
        struct snapshot_output tmp_output;
        unsigned int snapshot_success = 0;
@@ -4348,7 +4330,7 @@ int cmd_snapshot_record(struct ltt_session *session,
        ret = utils_get_current_time_str("%Y%m%d-%H%M%S", datetime,
                        sizeof(datetime));
        if (!ret) {
-               ret = LTTNG_ERR_INVALID;
+               cmd_ret = LTTNG_ERR_INVALID;
                goto error;
        }
 
@@ -4357,13 +4339,13 @@ int cmd_snapshot_record(struct ltt_session *session,
         * set in no output mode.
         */
        if (session->output_traces) {
-               ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION;
+               cmd_ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION;
                goto error;
        }
 
        /* The session needs to be started at least once. */
        if (!session->has_been_started) {
-               ret = LTTNG_ERR_START_SESSION_ONCE;
+               cmd_ret = LTTNG_ERR_START_SESSION_ONCE;
                goto error;
        }
 
@@ -4374,9 +4356,9 @@ int cmd_snapshot_record(struct ltt_session *session,
                                &tmp_output, NULL);
                if (ret < 0) {
                        if (ret == -ENOMEM) {
-                               ret = LTTNG_ERR_NOMEM;
+                               cmd_ret = LTTNG_ERR_NOMEM;
                        } else {
-                               ret = LTTNG_ERR_INVALID;
+                               cmd_ret = LTTNG_ERR_INVALID;
                        }
                        goto error;
                }
@@ -4394,24 +4376,24 @@ int cmd_snapshot_record(struct ltt_session *session,
                nb_packets_per_stream = get_session_nb_packets_per_stream(session,
                                tmp_output.max_size);
                if (nb_packets_per_stream < 0) {
-                       ret = LTTNG_ERR_MAX_SIZE_INVALID;
+                       cmd_ret = LTTNG_ERR_MAX_SIZE_INVALID;
                        goto error;
                }
 
                if (session->kernel_session) {
-                       ret = record_kernel_snapshot(session->kernel_session,
+                       cmd_ret = record_kernel_snapshot(session->kernel_session,
                                        &tmp_output, session,
                                        wait, nb_packets_per_stream);
-                       if (ret != LTTNG_OK) {
+                       if (cmd_ret != LTTNG_OK) {
                                goto error;
                        }
                }
 
                if (session->ust_session) {
-                       ret = record_ust_snapshot(session->ust_session,
+                       cmd_ret = record_ust_snapshot(session->ust_session,
                                        &tmp_output, session,
                                        wait, nb_packets_per_stream);
-                       if (ret != LTTNG_OK) {
+                       if (cmd_ret != LTTNG_OK) {
                                goto error;
                        }
                }
@@ -4440,7 +4422,7 @@ int cmd_snapshot_record(struct ltt_session *session,
                        nb_packets_per_stream = get_session_nb_packets_per_stream(session,
                                        tmp_output.max_size);
                        if (nb_packets_per_stream < 0) {
-                               ret = LTTNG_ERR_MAX_SIZE_INVALID;
+                               cmd_ret = LTTNG_ERR_MAX_SIZE_INVALID;
                                rcu_read_unlock();
                                goto error;
                        }
@@ -4449,7 +4431,7 @@ int cmd_snapshot_record(struct ltt_session *session,
                        if (*output->name != '\0') {
                                if (lttng_strncpy(tmp_output.name, output->name,
                                                sizeof(tmp_output.name))) {
-                                       ret = LTTNG_ERR_INVALID;
+                                       cmd_ret = LTTNG_ERR_INVALID;
                                        rcu_read_unlock();
                                        goto error;
                                }
@@ -4459,20 +4441,20 @@ int cmd_snapshot_record(struct ltt_session *session,
                        memcpy(tmp_output.datetime, datetime, sizeof(datetime));
 
                        if (session->kernel_session) {
-                               ret = record_kernel_snapshot(session->kernel_session,
+                               cmd_ret = record_kernel_snapshot(session->kernel_session,
                                                &tmp_output, session,
                                                wait, nb_packets_per_stream);
-                               if (ret != LTTNG_OK) {
+                               if (cmd_ret != LTTNG_OK) {
                                        rcu_read_unlock();
                                        goto error;
                                }
                        }
 
                        if (session->ust_session) {
-                               ret = record_ust_snapshot(session->ust_session,
+                               cmd_ret = record_ust_snapshot(session->ust_session,
                                                &tmp_output, session,
                                                wait, nb_packets_per_stream);
-                               if (ret != LTTNG_OK) {
+                               if (cmd_ret != LTTNG_OK) {
                                        rcu_read_unlock();
                                        goto error;
                                }
@@ -4485,11 +4467,11 @@ int cmd_snapshot_record(struct ltt_session *session,
        if (snapshot_success) {
                session->snapshot.nb_snapshot++;
        } else {
-               ret = LTTNG_ERR_SNAPSHOT_FAIL;
+               cmd_ret = LTTNG_ERR_SNAPSHOT_FAIL;
        }
 
 error:
-       return ret;
+       return cmd_ret;
 }
 
 /*
@@ -4521,12 +4503,13 @@ int cmd_set_session_shm_path(struct ltt_session *session,
  * Ask the consumer to rotate the session output directory.
  * The session lock must be held.
  *
- * Return LTTNG_OK on success or else a LTTNG_ERR code.
+ * Returns LTTNG_OK on success or else a negative LTTng error code.
  */
 int cmd_rotate_session(struct ltt_session *session,
                struct lttng_rotate_session_return *rotate_return)
 {
        int ret;
+       enum lttng_error_code cmd_ret = LTTNG_OK;
        size_t strf_ret;
        struct tm *timeinfo;
        char datetime[21];
@@ -4540,13 +4523,13 @@ int cmd_rotate_session(struct ltt_session *session,
        assert(session);
 
        if (!session->has_been_started) {
-               ret = -LTTNG_ERR_START_SESSION_ONCE;
+               cmd_ret = LTTNG_ERR_START_SESSION_ONCE;
                goto end;
        }
 
        if (session->live_timer || session->snapshot_mode ||
                        !session->output_traces) {
-               ret = -LTTNG_ERR_ROTATION_NOT_AVAILABLE;
+               cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE;
                goto end;
        }
 
@@ -4556,14 +4539,14 @@ int cmd_rotate_session(struct ltt_session *session,
        if (session->consumer->type == CONSUMER_DST_NET &&
                        (session->consumer->relay_major_version == 2 &&
                        session->consumer->relay_minor_version < 11)) {
-               ret = -LTTNG_ERR_ROTATION_NOT_AVAILABLE_RELAY;
+               cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_RELAY;
                goto end;
        }
 
        if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) {
-               ret = -LTTNG_ERR_ROTATION_PENDING;
                DBG("Refusing to launch a rotation; a rotation is already in progress for session %s",
                                session->name);
+               cmd_ret = LTTNG_ERR_ROTATION_PENDING;
                goto end;
        }
 
@@ -4574,7 +4557,7 @@ int cmd_rotate_session(struct ltt_session *session,
        if (session->rotated_after_last_stop) {
                DBG("Session \"%s\" was already rotated after stop, refusing rotation",
                                session->name);
-               ret = -LTTNG_ERR_ROTATION_MULTIPLE_AFTER_STOP;
+               cmd_ret = LTTNG_ERR_ROTATION_MULTIPLE_AFTER_STOP;
                goto end;
        }
 
@@ -4592,7 +4575,7 @@ int cmd_rotate_session(struct ltt_session *session,
                                sizeof(session->rotation_chunk.current_rotate_path));
                if (ret) {
                        ERR("Failed to copy session base path to current rotation chunk path");
-                       ret = -LTTNG_ERR_UNK;
+                       cmd_ret = LTTNG_ERR_UNK;
                        goto end;
                }
        } else {
@@ -4605,7 +4588,7 @@ int cmd_rotate_session(struct ltt_session *session,
                                sizeof(session->rotation_chunk.current_rotate_path));
                if (ret) {
                        ERR("Failed to copy the active tracing path to the current rotate path");
-                       ret = -LTTNG_ERR_UNK;
+                       cmd_ret = LTTNG_ERR_UNK;
                        goto end;
                }
        }
@@ -4619,7 +4602,7 @@ int cmd_rotate_session(struct ltt_session *session,
 
        now = time(NULL);
        if (now == (time_t) -1) {
-               ret = -LTTNG_ERR_ROTATION_NOT_AVAILABLE;
+               cmd_ret = LTTNG_ERR_UNK;
                goto end;
        }
 
@@ -4633,14 +4616,14 @@ int cmd_rotate_session(struct ltt_session *session,
        timeinfo = localtime(&now);
        if (!timeinfo) {
                PERROR("Failed to sample local time in rotate session command");
-               ret = -LTTNG_ERR_UNK;
+               cmd_ret = LTTNG_ERR_UNK;
                goto end;
        }
        strf_ret = strftime(datetime, sizeof(datetime), "%Y%m%dT%H%M%S%z",
                        timeinfo);
        if (!strf_ret) {
                ERR("Failed to format local time timestamp in rotate session command");
-               ret = -LTTNG_ERR_UNK;
+               cmd_ret = LTTNG_ERR_UNK;
                goto end;
        }
 
@@ -4665,7 +4648,7 @@ int cmd_rotate_session(struct ltt_session *session,
                                datetime, session->current_archive_id + 1);
                if (ret < 0 || ret == sizeof(session->rotation_chunk.active_tracing_path)) {
                        ERR("Failed to format active kernel tracing path in rotate session command");
-                       ret = -LTTNG_ERR_UNK;
+                       cmd_ret = LTTNG_ERR_UNK;
                        goto error;
                }
                /*
@@ -4678,7 +4661,7 @@ int cmd_rotate_session(struct ltt_session *session,
                                session->current_archive_id + 1);
                if (ret < 0 || ret == sizeof(session->kernel_session->consumer->chunk_path)) {
                        ERR("Failed to format the kernel consumer's sub-directory in rotate session command");
-                       ret = -LTTNG_ERR_UNK;
+                       cmd_ret = LTTNG_ERR_UNK;
                        goto error;
                }
                /*
@@ -4691,12 +4674,11 @@ int cmd_rotate_session(struct ltt_session *session,
                if (ret) {
                        ERR("Failed to create kernel session tracing path at %s",
                                        session->kernel_session->consumer->chunk_path);
-                       ret = -LTTNG_ERR_CREATE_DIR_FAIL;
+                       cmd_ret = LTTNG_ERR_CREATE_DIR_FAIL;
                        goto error;
                }
-               ret = kernel_rotate_session(session);
-               if (ret != LTTNG_OK) {
-                       ret = -ret;
+               cmd_ret = kernel_rotate_session(session);
+               if (cmd_ret != LTTNG_OK) {
                        goto error;
                }
        }
@@ -4707,7 +4689,7 @@ int cmd_rotate_session(struct ltt_session *session,
                                datetime, session->current_archive_id + 1);
                if (ret < 0) {
                        ERR("Failed to format active UST tracing path in rotate session command");
-                       ret = -LTTNG_ERR_UNK;
+                       cmd_ret = LTTNG_ERR_UNK;
                        goto error;
                }
                ret = snprintf(session->ust_session->consumer->chunk_path,
@@ -4715,7 +4697,7 @@ int cmd_rotate_session(struct ltt_session *session,
                                session->current_archive_id + 1);
                if (ret < 0) {
                        ERR("Failed to format the UST consumer's sub-directory in rotate session command");
-                       ret = -LTTNG_ERR_UNK;
+                       cmd_ret = LTTNG_ERR_UNK;
                        goto error;
                }
                /*
@@ -4726,11 +4708,11 @@ int cmd_rotate_session(struct ltt_session *session,
                                session->ust_session->uid,
                                session->ust_session->gid);
                if (ret) {
-                       ret = -LTTNG_ERR_CREATE_DIR_FAIL;
+                       cmd_ret = LTTNG_ERR_CREATE_DIR_FAIL;
                        goto error;
                }
-               ret = ust_app_rotate_session(session);
-               if (ret != LTTNG_OK) {
+               cmd_ret = ust_app_rotate_session(session);
+               if (cmd_ret != LTTNG_OK) {
                        goto error;
                }
        }
@@ -4738,6 +4720,7 @@ int cmd_rotate_session(struct ltt_session *session,
        ret = timer_session_rotation_pending_check_start(session,
                        DEFAULT_ROTATE_PENDING_TIMER);
        if (ret) {
+               cmd_ret = LTTNG_ERR_UNK;
                goto error;
        }
 
@@ -4756,13 +4739,13 @@ int cmd_rotate_session(struct ltt_session *session,
        if (ret != LTTNG_OK) {
                ERR("Failed to notify notification thread that a session rotation is ongoing for session %s",
                                session->name);
+               cmd_ret = ret;
        }
 
        DBG("Cmd rotate session %s, archive_id %" PRIu64 " sent",
                        session->name, session->current_archive_id - 1);
-       ret = LTTNG_OK;
-
 end:
+       ret = (cmd_ret == LTTNG_OK) ? cmd_ret : -((int) cmd_ret);
        return ret;
 error:
        session->last_chunk_start_ts = original_last_chunk_start_ts;
This page took 0.037082 seconds and 4 git commands to generate.