X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fcmd.c;h=1327e42e4ddfa8efdd5a550179000a8f77f34150;hp=e6c172ca51b6b30c880cb94376fab59f94d74118;hb=9ac05d92b567d3f722c2e76ed0f4ca08f95e9ca2;hpb=dac8e0462da102e089005c067ced055928610758 diff --git a/src/bin/lttng-sessiond/cmd.c b/src/bin/lttng-sessiond/cmd.c index e6c172ca5..1327e42e4 100644 --- a/src/bin/lttng-sessiond/cmd.c +++ b/src/bin/lttng-sessiond/cmd.c @@ -1,5 +1,6 @@ /* * Copyright (C) 2012 - David Goulet + * Copyright (C) 2016 - Jérémie Galarneau * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License, version 2 only, as @@ -15,10 +16,8 @@ * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ -#define _GNU_SOURCE #define _LGPL_SOURCE #include -#include #include #include #include @@ -28,6 +27,8 @@ #include #include #include +#include +#include #include "channel.h" #include "consumer.h" @@ -39,6 +40,7 @@ #include "utils.h" #include "syscall.h" #include "agent.h" +#include "buffer-registry.h" #include "cmd.h" @@ -51,6 +53,16 @@ static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; static uint64_t relayd_net_seq_idx; +static int validate_event_name(const char *); +static int validate_ust_event_name(const char *); +static int cmd_enable_event_internal(struct ltt_session *session, + struct lttng_domain *domain, + char *channel_name, struct lttng_event *event, + char *filter_expression, + struct lttng_filter_bytecode *filter, + struct lttng_event_exclusion *exclusion, + int wpipe); + /* * Create a session path used by list_lttng_sessions for the case that the * session consumer is on the network. @@ -129,13 +141,105 @@ error: return ret; } +/* + * Get run-time attributes if the session has been started (discarded events, + * lost packets). + */ +static int get_kernel_runtime_stats(struct ltt_session *session, + struct ltt_kernel_channel *kchan, uint64_t *discarded_events, + uint64_t *lost_packets) +{ + int ret; + + if (!session->has_been_started) { + ret = 0; + *discarded_events = 0; + *lost_packets = 0; + goto end; + } + + ret = consumer_get_discarded_events(session->id, kchan->fd, + session->kernel_session->consumer, + discarded_events); + if (ret < 0) { + goto end; + } + + ret = consumer_get_lost_packets(session->id, kchan->fd, + session->kernel_session->consumer, + lost_packets); + if (ret < 0) { + goto end; + } + +end: + return ret; +} + +/* + * Get run-time attributes if the session has been started (discarded events, + * lost packets). + */ +static int get_ust_runtime_stats(struct ltt_session *session, + struct ltt_ust_channel *uchan, uint64_t *discarded_events, + uint64_t *lost_packets) +{ + int ret; + struct ltt_ust_session *usess; + + if (!discarded_events || !lost_packets) { + ret = -1; + goto end; + } + + usess = session->ust_session; + assert(discarded_events); + assert(lost_packets); + + if (!usess || !session->has_been_started) { + *discarded_events = 0; + *lost_packets = 0; + ret = 0; + goto end; + } + + if (usess->buffer_type == LTTNG_BUFFER_PER_UID) { + ret = ust_app_uid_get_channel_runtime_stats(usess->id, + &usess->buffer_reg_uid_list, + usess->consumer, uchan->id, + uchan->attr.overwrite, + discarded_events, + lost_packets); + } else if (usess->buffer_type == LTTNG_BUFFER_PER_PID) { + ret = ust_app_pid_get_channel_runtime_stats(usess, + uchan, usess->consumer, + uchan->attr.overwrite, + discarded_events, + lost_packets); + if (ret < 0) { + goto end; + } + *discarded_events += uchan->per_pid_closed_app_discarded; + *lost_packets += uchan->per_pid_closed_app_lost; + } else { + ERR("Unsupported buffer type"); + assert(0); + ret = -1; + goto end; + } + +end: + return ret; +} + /* * Fill lttng_channel array of all channels. */ -static void list_lttng_channels(int domain, struct ltt_session *session, - struct lttng_channel *channels) +static void list_lttng_channels(enum lttng_domain_type domain, + struct ltt_session *session, struct lttng_channel *channels, + struct lttcomm_channel_extended *chan_exts) { - int i = 0; + int i = 0, ret; struct ltt_kernel_channel *kchan; DBG("Listing channels for session %s", session->name); @@ -146,9 +250,19 @@ static void list_lttng_channels(int domain, struct ltt_session *session, if (session->kernel_session != NULL) { cds_list_for_each_entry(kchan, &session->kernel_session->channel_list.head, list) { + uint64_t discarded_events, lost_packets; + + ret = get_kernel_runtime_stats(session, kchan, + &discarded_events, &lost_packets); + if (ret < 0) { + goto end; + } /* Copy lttng_channel struct to array */ memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); channels[i].enabled = kchan->enabled; + chan_exts[i].discarded_events = + discarded_events; + chan_exts[i].lost_packets = lost_packets; i++; } } @@ -161,6 +275,8 @@ static void list_lttng_channels(int domain, struct ltt_session *session, rcu_read_lock(); cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, &iter.iter, uchan, node.node) { + uint64_t discarded_events = 0, lost_packets = 0; + strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); channels[i].attr.overwrite = uchan->attr.overwrite; channels[i].attr.subbuf_size = uchan->attr.subbuf_size; @@ -172,12 +288,30 @@ static void list_lttng_channels(int domain, struct ltt_session *session, channels[i].enabled = uchan->enabled; channels[i].attr.tracefile_size = uchan->tracefile_size; channels[i].attr.tracefile_count = uchan->tracefile_count; + + /* + * Map enum lttng_ust_output to enum lttng_event_output. + */ switch (uchan->attr.output) { case LTTNG_UST_MMAP: - default: channels[i].attr.output = LTTNG_EVENT_MMAP; break; + default: + /* + * LTTNG_UST_MMAP is the only supported UST + * output mode. + */ + assert(0); + break; } + + ret = get_ust_runtime_stats(session, uchan, + &discarded_events, &lost_packets); + if (ret < 0) { + break; + } + chan_exts[i].discarded_events = discarded_events; + chan_exts[i].lost_packets = lost_packets; i++; } rcu_read_unlock(); @@ -186,6 +320,61 @@ static void list_lttng_channels(int domain, struct ltt_session *session, default: break; } + +end: + return; +} + +static void increment_extended_len(const char *filter_expression, + struct lttng_event_exclusion *exclusion, size_t *extended_len) +{ + *extended_len += sizeof(struct lttcomm_event_extended_header); + + if (filter_expression) { + *extended_len += strlen(filter_expression) + 1; + } + + if (exclusion) { + *extended_len += exclusion->count * LTTNG_SYMBOL_NAME_LEN; + } +} + +static void append_extended_info(const char *filter_expression, + struct lttng_event_exclusion *exclusion, void **extended_at) +{ + struct lttcomm_event_extended_header extended_header; + size_t filter_len = 0; + size_t nb_exclusions = 0; + + if (filter_expression) { + filter_len = strlen(filter_expression) + 1; + } + + if (exclusion) { + nb_exclusions = exclusion->count; + } + + /* Set header fields */ + extended_header.filter_len = filter_len; + extended_header.nb_exclusions = nb_exclusions; + + /* Copy header */ + memcpy(*extended_at, &extended_header, sizeof(extended_header)); + *extended_at += sizeof(extended_header); + + /* Copy filter string */ + if (filter_expression) { + memcpy(*extended_at, filter_expression, filter_len); + *extended_at += filter_len; + } + + /* Copy exclusion names */ + if (exclusion) { + size_t len = nb_exclusions * LTTNG_SYMBOL_NAME_LEN; + + memcpy(*extended_at, &exclusion->names, len); + *extended_at += len; + } } /* @@ -194,13 +383,15 @@ static void list_lttng_channels(int domain, struct ltt_session *session, * Return number of events in list on success or else a negative value. */ static int list_lttng_agent_events(struct agent *agt, - struct lttng_event **events) + struct lttng_event **events, size_t *total_size) { int i = 0, ret = 0; unsigned int nb_event = 0; struct agent_event *event; struct lttng_event *tmp_events; struct lttng_ht_iter iter; + size_t extended_len = 0; + void *extended_at; assert(agt); assert(events); @@ -212,24 +403,47 @@ static int list_lttng_agent_events(struct agent *agt, rcu_read_unlock(); if (nb_event == 0) { ret = nb_event; + *total_size = 0; goto error; } - tmp_events = zmalloc(nb_event * sizeof(*tmp_events)); + /* Compute required extended infos size */ + extended_len = nb_event * sizeof(struct lttcomm_event_extended_header); + + /* + * This is only valid because the commands which add events are + * processed in the same thread as the listing. + */ + rcu_read_lock(); + cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { + increment_extended_len(event->filter_expression, NULL, + &extended_len); + } + rcu_read_unlock(); + + *total_size = nb_event * sizeof(*tmp_events) + extended_len; + tmp_events = zmalloc(*total_size); if (!tmp_events) { PERROR("zmalloc agent events session"); ret = -LTTNG_ERR_FATAL; goto error; } + extended_at = ((uint8_t *) tmp_events) + + nb_event * sizeof(struct lttng_event); + rcu_read_lock(); cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { strncpy(tmp_events[i].name, event->name, sizeof(tmp_events[i].name)); tmp_events[i].name[sizeof(tmp_events[i].name) - 1] = '\0'; tmp_events[i].enabled = event->enabled; - tmp_events[i].loglevel = event->loglevel; + tmp_events[i].loglevel = event->loglevel_value; tmp_events[i].loglevel_type = event->loglevel_type; i++; + + /* Append extended info */ + append_extended_info(event->filter_expression, NULL, + &extended_at); } rcu_read_unlock(); @@ -245,7 +459,8 @@ error: * Create a list of ust global domain events. */ static int list_lttng_ust_global_events(char *channel_name, - struct ltt_ust_domain_global *ust_global, struct lttng_event **events) + struct ltt_ust_domain_global *ust_global, + struct lttng_event **events, size_t *total_size) { int i = 0, ret = 0; unsigned int nb_event = 0; @@ -254,6 +469,8 @@ static int list_lttng_ust_global_events(char *channel_name, struct ltt_ust_channel *uchan; struct ltt_ust_event *uevent; struct lttng_event *tmp; + size_t extended_len = 0; + void *extended_at; DBG("Listing UST global events for channel %s", channel_name); @@ -263,27 +480,51 @@ static int list_lttng_ust_global_events(char *channel_name, node = lttng_ht_iter_get_node_str(&iter); if (node == NULL) { ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; - goto error; + goto end; } uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); - nb_event += lttng_ht_get_count(uchan->events); - + nb_event = lttng_ht_get_count(uchan->events); if (nb_event == 0) { ret = nb_event; - goto error; + *total_size = 0; + goto end; } DBG3("Listing UST global %d events", nb_event); - tmp = zmalloc(nb_event * sizeof(struct lttng_event)); + /* Compute required extended infos size */ + cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { + if (uevent->internal) { + nb_event--; + continue; + } + + increment_extended_len(uevent->filter_expression, + uevent->exclusion, &extended_len); + } + if (nb_event == 0) { + /* All events are internal, skip. */ + ret = 0; + *total_size = 0; + goto end; + } + + *total_size = nb_event * sizeof(struct lttng_event) + extended_len; + tmp = zmalloc(*total_size); if (tmp == NULL) { - ret = LTTNG_ERR_FATAL; - goto error; + ret = -LTTNG_ERR_FATAL; + goto end; } + extended_at = ((uint8_t *) tmp) + nb_event * sizeof(struct lttng_event); + cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { + if (uevent->internal) { + /* This event should remain hidden from clients */ + continue; + } strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; tmp[i].enabled = uevent->enabled; @@ -319,12 +560,15 @@ static int list_lttng_ust_global_events(char *channel_name, tmp[i].exclusion = 1; } i++; + + /* Append extended info */ + append_extended_info(uevent->filter_expression, + uevent->exclusion, &extended_at); } ret = nb_event; *events = tmp; - -error: +end: rcu_read_unlock(); return ret; } @@ -333,12 +577,15 @@ error: * Fill lttng_event array of all kernel events in the channel. */ static int list_lttng_kernel_events(char *channel_name, - struct ltt_kernel_session *kernel_session, struct lttng_event **events) + struct ltt_kernel_session *kernel_session, + struct lttng_event **events, size_t *total_size) { int i = 0, ret; unsigned int nb_event; struct ltt_kernel_event *event; struct ltt_kernel_channel *kchan; + size_t extended_len = 0; + void *extended_at; kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); if (kchan == NULL) { @@ -351,21 +598,34 @@ static int list_lttng_kernel_events(char *channel_name, DBG("Listing events for channel %s", kchan->channel->name); if (nb_event == 0) { + *total_size = 0; *events = NULL; - goto syscall; + goto end; } - *events = zmalloc(nb_event * sizeof(struct lttng_event)); + /* Compute required extended infos size */ + cds_list_for_each_entry(event, &kchan->events_list.head, list) { + increment_extended_len(event->filter_expression, NULL, + &extended_len); + } + + *total_size = nb_event * sizeof(struct lttng_event) + extended_len; + *events = zmalloc(*total_size); if (*events == NULL) { ret = LTTNG_ERR_FATAL; goto error; } + extended_at = ((void *) *events) + + nb_event * sizeof(struct lttng_event); + /* Kernel channels */ cds_list_for_each_entry(event, &kchan->events_list.head , list) { strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; (*events)[i].enabled = event->enabled; + (*events)[i].filter = + (unsigned char) !!event->filter_expression; switch (event->event->instrumentation) { case LTTNG_KERNEL_TRACEPOINT: @@ -397,21 +657,13 @@ static int list_lttng_kernel_events(char *channel_name, break; } i++; - } - -syscall: - if (syscall_table) { - ssize_t new_size; - new_size = syscall_list_channel(kchan, events, nb_event); - if (new_size < 0) { - free(events); - ret = -new_size; - goto error; - } - nb_event = new_size; + /* Append extended info */ + append_extended_info(event->filter_expression, NULL, + &extended_at); } +end: return nb_event; error: @@ -424,7 +676,8 @@ error: * domain adding the default trace directory. */ static int add_uri_to_consumer(struct consumer_output *consumer, - struct lttng_uri *uri, int domain, const char *session_name) + struct lttng_uri *uri, enum lttng_domain_type domain, + const char *session_name) { int ret = LTTNG_OK; const char *default_trace_dir; @@ -505,12 +758,15 @@ static int add_uri_to_consumer(struct consumer_output *consumer, DBG2("Setting trace directory path from URI to %s", uri->dst.path); memset(consumer->dst.trace_path, 0, sizeof(consumer->dst.trace_path)); - strncpy(consumer->dst.trace_path, uri->dst.path, - sizeof(consumer->dst.trace_path)); + /* Explicit length checks for strcpy and strcat. */ + if (strlen(uri->dst.path) + strlen(default_trace_dir) + >= sizeof(consumer->dst.trace_path)) { + ret = LTTNG_ERR_FATAL; + goto error; + } + strcpy(consumer->dst.trace_path, uri->dst.path); /* Append default trace dir */ - strncat(consumer->dst.trace_path, default_trace_dir, - sizeof(consumer->dst.trace_path) - - strlen(consumer->dst.trace_path) - 1); + strcat(consumer->dst.trace_path, default_trace_dir); /* Flag consumer as local. */ consumer->type = CONSUMER_DST_LOCAL; break; @@ -560,7 +816,8 @@ error: * Else, it's stays untouched and a lttcomm error code is returned. */ static int create_connect_relayd(struct lttng_uri *uri, - struct lttcomm_relayd_sock **relayd_sock) + struct lttcomm_relayd_sock **relayd_sock, + struct consumer_output *consumer) { int ret; struct lttcomm_relayd_sock *rsock; @@ -596,6 +853,8 @@ static int create_connect_relayd(struct lttng_uri *uri, ret = LTTNG_ERR_RELAYD_VERSION_FAIL; goto close_sock; } + consumer->relay_major_version = rsock->major; + consumer->relay_minor_version = rsock->minor; } else if (uri->stype == LTTNG_STREAM_DATA) { DBG3("Creating relayd data socket from URI"); } else { @@ -621,8 +880,9 @@ error: /* * Connect to the relayd using URI and send the socket to the right consumer. */ -static int send_consumer_relayd_socket(int domain, unsigned int session_id, - struct lttng_uri *relayd_uri, struct consumer_output *consumer, +static int send_consumer_relayd_socket(enum lttng_domain_type domain, + unsigned int session_id, struct lttng_uri *relayd_uri, + struct consumer_output *consumer, struct consumer_socket *consumer_sock, char *session_name, char *hostname, int session_live_timer) { @@ -630,7 +890,7 @@ static int send_consumer_relayd_socket(int domain, unsigned int session_id, struct lttcomm_relayd_sock *rsock = NULL; /* Connect to relayd and make version check if uri is the control. */ - ret = create_connect_relayd(relayd_uri, &rsock); + ret = create_connect_relayd(relayd_uri, &rsock, consumer); if (ret != LTTNG_OK) { goto error; } @@ -692,9 +952,10 @@ error: * helper function to facilitate sending the information to the consumer for a * session. */ -static int send_consumer_relayd_sockets(int domain, unsigned int session_id, - struct consumer_output *consumer, struct consumer_socket *sock, - char *session_name, char *hostname, int session_live_timer) +static int 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; @@ -764,6 +1025,10 @@ int cmd_setup_relayd(struct ltt_session *session) /* Session is now ready for network streaming. */ session->net_handle = 1; } + session->consumer->relay_major_version = + usess->consumer->relay_major_version; + session->consumer->relay_minor_version = + usess->consumer->relay_minor_version; } if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET @@ -782,6 +1047,10 @@ int cmd_setup_relayd(struct ltt_session *session) /* Session is now ready for network streaming. */ session->net_handle = 1; } + session->consumer->relay_major_version = + ksess->consumer->relay_major_version; + session->consumer->relay_minor_version = + ksess->consumer->relay_minor_version; } error: @@ -857,8 +1126,8 @@ error: /* * Command LTTNG_DISABLE_CHANNEL processed by the client thread. */ -int cmd_disable_channel(struct ltt_session *session, int domain, - char *channel_name) +int cmd_disable_channel(struct ltt_session *session, + enum lttng_domain_type domain, char *channel_name) { int ret; struct ltt_ust_session *usess; @@ -915,7 +1184,8 @@ error: * * Called with session lock held. */ -int cmd_track_pid(struct ltt_session *session, int domain, int pid) +int cmd_track_pid(struct ltt_session *session, enum lttng_domain_type domain, + int pid) { int ret; @@ -965,7 +1235,8 @@ error: * * Called with session lock held. */ -int cmd_untrack_pid(struct ltt_session *session, int domain, int pid) +int cmd_untrack_pid(struct ltt_session *session, enum lttng_domain_type domain, + int pid) { int ret; @@ -1027,7 +1298,7 @@ int cmd_enable_channel(struct ltt_session *session, assert(attr); assert(domain); - len = strnlen(attr->name, sizeof(attr->name)); + len = lttng_strnlen(attr->name, sizeof(attr->name)); /* Validate channel name */ if (attr->name[0] == '.' || @@ -1093,9 +1364,40 @@ int cmd_enable_channel(struct ltt_session *session, break; } case LTTNG_DOMAIN_UST: + case LTTNG_DOMAIN_JUL: + case LTTNG_DOMAIN_LOG4J: + case LTTNG_DOMAIN_PYTHON: { struct ltt_ust_channel *uchan; + /* + * FIXME + * + * Current agent implementation limitations force us to allow + * only one channel at once in "agent" subdomains. Each + * subdomain has a default channel name which must be strictly + * adhered to. + */ + if (domain->type == LTTNG_DOMAIN_JUL) { + if (strncmp(attr->name, DEFAULT_JUL_CHANNEL_NAME, + LTTNG_SYMBOL_NAME_LEN)) { + ret = LTTNG_ERR_INVALID_CHANNEL_NAME; + goto error; + } + } else if (domain->type == LTTNG_DOMAIN_LOG4J) { + if (strncmp(attr->name, DEFAULT_LOG4J_CHANNEL_NAME, + LTTNG_SYMBOL_NAME_LEN)) { + ret = LTTNG_ERR_INVALID_CHANNEL_NAME; + goto error; + } + } else if (domain->type == LTTNG_DOMAIN_PYTHON) { + if (strncmp(attr->name, DEFAULT_PYTHON_CHANNEL_NAME, + LTTNG_SYMBOL_NAME_LEN)) { + ret = LTTNG_ERR_INVALID_CHANNEL_NAME; + goto error; + } + } + chan_ht = usess->domain_global.channels; uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); @@ -1123,8 +1425,8 @@ end: /* * Command LTTNG_DISABLE_EVENT processed by the client thread. */ -int cmd_disable_event(struct ltt_session *session, int domain, - char *channel_name, +int cmd_disable_event(struct ltt_session *session, + enum lttng_domain_type domain, char *channel_name, struct lttng_event *event) { int ret; @@ -1133,11 +1435,16 @@ int cmd_disable_event(struct ltt_session *session, int domain, DBG("Disable event command for event \'%s\'", event->name); event_name = event->name; + if (validate_event_name(event_name)) { + ret = LTTNG_ERR_INVALID_EVENT_NAME; + goto error; + } /* Error out on unhandled search criteria */ if (event->loglevel_type || event->loglevel != -1 || event->enabled || event->pid || event->filter || event->exclusion) { - return LTTNG_ERR_UNK; + ret = LTTNG_ERR_UNK; + goto error; } rcu_read_lock(); @@ -1157,46 +1464,36 @@ int cmd_disable_event(struct ltt_session *session, int domain, */ if (ksess->has_non_default_channel && channel_name[0] == '\0') { ret = LTTNG_ERR_NEED_CHANNEL_NAME; - goto error; + goto error_unlock; } kchan = trace_kernel_get_channel_by_name(channel_name, ksess); if (kchan == NULL) { ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; - goto error; + goto error_unlock; } switch (event->type) { case LTTNG_EVENT_ALL: - ret = event_kernel_disable_event_all(kchan); - if (ret != LTTNG_OK) { - goto error; - } - break; - case LTTNG_EVENT_TRACEPOINT: /* fall-through */ + case LTTNG_EVENT_TRACEPOINT: case LTTNG_EVENT_SYSCALL: - if (!strcmp(event_name, "*")) { - ret = event_kernel_disable_event_type(kchan, - event->type); + case LTTNG_EVENT_PROBE: + case LTTNG_EVENT_FUNCTION: + case LTTNG_EVENT_FUNCTION_ENTRY:/* fall-through */ + if (event_name[0] == '\0') { + ret = event_kernel_disable_event(kchan, + NULL, event->type); } else { ret = event_kernel_disable_event(kchan, - event_name); + event_name, event->type); } if (ret != LTTNG_OK) { - goto error; - } - break; - case LTTNG_EVENT_PROBE: - case LTTNG_EVENT_FUNCTION: - case LTTNG_EVENT_FUNCTION_ENTRY: - ret = event_kernel_disable_event(kchan, event_name); - if (ret != LTTNG_OK) { - goto error; + goto error_unlock; } break; default: ret = LTTNG_ERR_UNK; - goto error; + goto error_unlock; } kernel_wait_quiescent(kernel_tracer_fd); @@ -1209,33 +1506,47 @@ int cmd_disable_event(struct ltt_session *session, int domain, usess = session->ust_session; + if (validate_ust_event_name(event_name)) { + ret = LTTNG_ERR_INVALID_EVENT_NAME; + goto error_unlock; + } + /* * If a non-default channel has been created in the - * session, explicitely require that -c chan_name needs + * session, explicitly require that -c chan_name needs * to be provided. */ if (usess->has_non_default_channel && channel_name[0] == '\0') { ret = LTTNG_ERR_NEED_CHANNEL_NAME; - goto error; + goto error_unlock; } uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, channel_name); if (uchan == NULL) { ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; - goto error; + goto error_unlock; } switch (event->type) { case LTTNG_EVENT_ALL: - ret = event_ust_disable_tracepoint(usess, uchan, event_name); + /* + * An empty event name means that everything + * should be disabled. + */ + if (event->name[0] == '\0') { + ret = event_ust_disable_all_tracepoints(usess, uchan); + } else { + ret = event_ust_disable_tracepoint(usess, uchan, + event_name); + } if (ret != LTTNG_OK) { - goto error; + goto error_unlock; } break; default: ret = LTTNG_ERR_UNK; - goto error; + goto error_unlock; } DBG3("Disable UST event %s in channel %s completed", event_name, @@ -1256,45 +1567,55 @@ int cmd_disable_event(struct ltt_session *session, int domain, break; default: ret = LTTNG_ERR_UNK; - goto error; + goto error_unlock; } agt = trace_ust_find_agent(usess, domain); if (!agt) { ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; - goto error; + goto error_unlock; } - /* The wild card * means that everything should be disabled. */ - if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { + /* + * An empty event name means that everything + * should be disabled. + */ + if (event->name[0] == '\0') { ret = event_agent_disable_all(usess, agt); } else { ret = event_agent_disable(usess, agt, event_name); } if (ret != LTTNG_OK) { - goto error; + goto error_unlock; } break; } default: ret = LTTNG_ERR_UND; - goto error; + goto error_unlock; } ret = LTTNG_OK; -error: +error_unlock: rcu_read_unlock(); +error: return ret; } /* * Command LTTNG_ADD_CONTEXT processed by the client thread. */ -int cmd_add_context(struct ltt_session *session, int domain, +int cmd_add_context(struct ltt_session *session, enum lttng_domain_type domain, char *channel_name, struct lttng_event_context *ctx, int kwpipe) { int ret, chan_kern_created = 0, chan_ust_created = 0; + char *app_ctx_provider_name = NULL, *app_ctx_name = NULL; + + if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { + app_ctx_provider_name = ctx->u.app_ctx.provider_name; + app_ctx_name = ctx->u.app_ctx.ctx_name; + } switch (domain) { case LTTNG_DOMAIN_KERNEL: @@ -1314,6 +1635,29 @@ int cmd_add_context(struct ltt_session *session, int domain, goto error; } break; + case LTTNG_DOMAIN_JUL: + case LTTNG_DOMAIN_LOG4J: + { + /* + * Validate channel name. + * If no channel name is given and the domain is JUL or LOG4J, + * set it to the appropriate domain-specific channel name. If + * a name is provided but does not match the expexted channel + * name, return an error. + */ + if (domain == LTTNG_DOMAIN_JUL && *channel_name && + strcmp(channel_name, + DEFAULT_JUL_CHANNEL_NAME)) { + ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; + goto error; + } else if (domain == LTTNG_DOMAIN_LOG4J && *channel_name && + strcmp(channel_name, + DEFAULT_LOG4J_CHANNEL_NAME)) { + ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; + goto error; + } + /* break is _not_ missing here. */ + } case LTTNG_DOMAIN_UST: { struct ltt_ust_session *usess = session->ust_session; @@ -1341,6 +1685,10 @@ int cmd_add_context(struct ltt_session *session, int domain, } ret = context_ust_add(usess, domain, ctx, channel_name); + free(app_ctx_provider_name); + free(app_ctx_name); + app_ctx_name = NULL; + app_ctx_provider_name = NULL; if (ret != LTTNG_OK) { goto error; } @@ -1351,7 +1699,8 @@ int cmd_add_context(struct ltt_session *session, int domain, goto error; } - return LTTNG_OK; + ret = LTTNG_OK; + goto end; error: if (chan_kern_created) { @@ -1375,6 +1724,9 @@ error: uchan); trace_ust_destroy_channel(uchan); } +end: + free(app_ctx_provider_name); + free(app_ctx_name); return ret; } @@ -1446,14 +1798,6 @@ end: return ret; } -static int cmd_enable_event_internal(struct ltt_session *session, - struct lttng_domain *domain, - char *channel_name, struct lttng_event *event, - char *filter_expression, - struct lttng_filter_bytecode *filter, - struct lttng_event_exclusion *exclusion, - int wpipe); - /* * Internal version of cmd_enable_event() with a supplemental * "internal_event" flag which is used to enable internal events which should @@ -1469,21 +1813,24 @@ static int _cmd_enable_event(struct ltt_session *session, int wpipe, bool internal_event) { int ret, channel_created = 0; - struct lttng_channel *attr; + struct lttng_channel *attr = NULL; assert(session); assert(event); assert(channel_name); + /* If we have a filter, we must have its filter expression */ + assert(!(!!filter_expression ^ !!filter)); + DBG("Enable event command for event \'%s\'", event->name); + rcu_read_lock(); + ret = validate_event_name(event->name); if (ret) { goto error; } - rcu_read_lock(); - switch (domain->type) { case LTTNG_DOMAIN_KERNEL: { @@ -1509,15 +1856,16 @@ static int _cmd_enable_event(struct ltt_session *session, ret = LTTNG_ERR_FATAL; goto error; } - strncpy(attr->name, channel_name, sizeof(attr->name)); + if (lttng_strncpy(attr->name, channel_name, + sizeof(attr->name))) { + ret = LTTNG_ERR_INVALID; + goto error; + } ret = cmd_enable_channel(session, domain, attr, wpipe); if (ret != LTTNG_OK) { - free(attr); goto error; } - free(attr); - channel_created = 1; } @@ -1575,9 +1923,10 @@ static int _cmd_enable_event(struct ltt_session *session, event->type = LTTNG_EVENT_SYSCALL; /* Hack */ ret = event_kernel_enable_event(kchan, event, filter_expression_a, filter_a); + /* We have passed ownership */ + filter_expression_a = NULL; + filter_a = NULL; if (ret != LTTNG_OK) { - free(filter_expression_a); - free(filter_a); goto error; } break; @@ -1645,14 +1994,16 @@ static int _cmd_enable_event(struct ltt_session *session, ret = LTTNG_ERR_FATAL; goto error; } - strncpy(attr->name, channel_name, sizeof(attr->name)); + if (lttng_strncpy(attr->name, channel_name, + sizeof(attr->name))) { + ret = LTTNG_ERR_INVALID; + goto error; + } ret = cmd_enable_channel(session, domain, attr, wpipe); if (ret != LTTNG_OK) { - free(attr); goto error; } - free(attr); /* Get the newly created channel reference back */ uchan = trace_ust_find_channel_by_name( @@ -1660,6 +2011,16 @@ static int _cmd_enable_event(struct ltt_session *session, assert(uchan); } + if (uchan->domain != LTTNG_DOMAIN_UST && !internal_event) { + /* + * Don't allow users to add UST events to channels which + * are assigned to a userspace subdomain (JUL, Log4J, + * Python, etc.). + */ + ret = LTTNG_ERR_INVALID_CHANNEL_DOMAIN; + goto error; + } + if (!internal_event) { /* * Ensure the event name is not reserved for internal @@ -1683,7 +2044,9 @@ static int _cmd_enable_event(struct ltt_session *session, filter_expression = NULL; filter = NULL; exclusion = NULL; - if (ret != LTTNG_OK) { + if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { + goto already_enabled; + } else if (ret != LTTNG_OK) { goto error; } break; @@ -1704,7 +2067,7 @@ static int _cmd_enable_event(struct ltt_session *session, if (!agt) { agt = agent_create(domain->type); if (!agt) { - ret = -LTTNG_ERR_NOMEM; + ret = LTTNG_ERR_NOMEM; goto error; } agent_add(agt, usess->agents); @@ -1714,9 +2077,10 @@ static int _cmd_enable_event(struct ltt_session *session, memset(&uevent, 0, sizeof(uevent)); uevent.type = LTTNG_EVENT_TRACEPOINT; uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; - default_event_name = event_get_default_agent_ust_name(domain->type); + default_event_name = event_get_default_agent_ust_name( + domain->type); if (!default_event_name) { - ret = -LTTNG_ERR_FATAL; + ret = LTTNG_ERR_FATAL; goto error; } strncpy(uevent.name, default_event_name, sizeof(uevent.name)); @@ -1741,46 +2105,61 @@ static int _cmd_enable_event(struct ltt_session *session, default_chan_name = DEFAULT_PYTHON_CHANNEL_NAME; break; default: - /* The switch/case we are in should avoid this else big problem */ + /* The switch/case we are in makes this impossible */ assert(0); } { + char *filter_expression_copy = NULL; struct lttng_filter_bytecode *filter_copy = NULL; if (filter) { - filter_copy = zmalloc( - sizeof(struct lttng_filter_bytecode) - + filter->len); + const size_t filter_size = sizeof( + struct lttng_filter_bytecode) + + filter->len; + + filter_copy = zmalloc(filter_size); if (!filter_copy) { + ret = LTTNG_ERR_NOMEM; goto error; } + memcpy(filter_copy, filter, filter_size); + + filter_expression_copy = + strdup(filter_expression); + if (!filter_expression) { + ret = LTTNG_ERR_NOMEM; + } - memcpy(filter_copy, filter, - sizeof(struct lttng_filter_bytecode) - + filter->len); + if (!filter_expression_copy || !filter_copy) { + free(filter_expression_copy); + free(filter_copy); + goto error; + } } ret = cmd_enable_event_internal(session, &tmp_dom, (char *) default_chan_name, - &uevent, filter_expression, filter_copy, - NULL, wpipe); - /* We have passed ownership */ - filter_expression = NULL; + &uevent, filter_expression_copy, + filter_copy, NULL, wpipe); } - if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_ENABLED) { + if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { + goto already_enabled; + } else if (ret != LTTNG_OK) { goto error; } /* The wild card * means that everything should be enabled. */ if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { - ret = event_agent_enable_all(usess, agt, event, filter); - filter = NULL; + ret = event_agent_enable_all(usess, agt, event, filter, + filter_expression); } else { - ret = event_agent_enable(usess, agt, event, filter); - filter = NULL; + ret = event_agent_enable(usess, agt, event, filter, + filter_expression); } + filter = NULL; + filter_expression = NULL; if (ret != LTTNG_OK) { goto error; } @@ -1794,10 +2173,12 @@ static int _cmd_enable_event(struct ltt_session *session, ret = LTTNG_OK; +already_enabled: error: free(filter_expression); free(filter); free(exclusion); + free(attr); rcu_read_unlock(); return ret; } @@ -1837,7 +2218,8 @@ static int cmd_enable_event_internal(struct ltt_session *session, /* * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. */ -ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) +ssize_t cmd_list_tracepoints(enum lttng_domain_type domain, + struct lttng_event **events) { int ret; ssize_t nb_events = 0; @@ -1881,7 +2263,7 @@ error: /* * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. */ -ssize_t cmd_list_tracepoint_fields(int domain, +ssize_t cmd_list_tracepoint_fields(enum lttng_domain_type domain, struct lttng_event_field **fields) { int ret; @@ -1919,7 +2301,7 @@ ssize_t cmd_list_syscalls(struct lttng_event **events) * Called with session lock held. */ ssize_t cmd_list_tracker_pids(struct ltt_session *session, - int domain, int32_t **pids) + enum lttng_domain_type domain, int32_t **pids) { int ret; ssize_t nr_pids = 0; @@ -2275,7 +2657,7 @@ int cmd_create_session_snapshot(char *name, struct lttng_uri *uris, * Create session in no output mode with URIs set to NULL. The uris we've * received are for a default snapshot output if one. */ - ret = cmd_create_session_uri(name, NULL, 0, creds, -1); + ret = cmd_create_session_uri(name, NULL, 0, creds, 0); if (ret != LTTNG_OK) { goto error; } @@ -2376,7 +2758,8 @@ int cmd_destroy_session(struct ltt_session *session, int wpipe) /* * Command LTTNG_CALIBRATE processed by the client thread. */ -int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) +int cmd_calibrate(enum lttng_domain_type domain, + struct lttng_calibrate *calibrate) { int ret; @@ -2433,8 +2816,9 @@ error: /* * Command LTTNG_REGISTER_CONSUMER processed by the client thread. */ -int cmd_register_consumer(struct ltt_session *session, int domain, - const char *sock_path, struct consumer_data *cdata) +int cmd_register_consumer(struct ltt_session *session, + enum lttng_domain_type domain, const char *sock_path, + struct consumer_data *cdata) { int ret, sock; struct consumer_socket *socket = NULL; @@ -2585,11 +2969,10 @@ error: /* * Command LTTNG_LIST_CHANNELS processed by the client thread. */ -ssize_t cmd_list_channels(int domain, struct ltt_session *session, - struct lttng_channel **channels) +ssize_t cmd_list_channels(enum lttng_domain_type domain, + struct ltt_session *session, struct lttng_channel **channels) { - int ret; - ssize_t nb_chan = 0; + ssize_t nb_chan = 0, payload_size = 0, ret; switch (domain) { case LTTNG_DOMAIN_KERNEL: @@ -2598,7 +2981,8 @@ ssize_t cmd_list_channels(int domain, struct ltt_session *session, } DBG3("Number of kernel channels %zd", nb_chan); if (nb_chan <= 0) { - ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; + ret = -LTTNG_ERR_KERN_CHAN_NOT_FOUND; + goto end; } break; case LTTNG_DOMAIN_UST: @@ -2610,37 +2994,45 @@ ssize_t cmd_list_channels(int domain, struct ltt_session *session, } DBG3("Number of UST global channels %zd", nb_chan); if (nb_chan < 0) { - ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; - goto error; + ret = -LTTNG_ERR_UST_CHAN_NOT_FOUND; + goto end; } break; default: - ret = LTTNG_ERR_UND; - goto error; + ret = -LTTNG_ERR_UND; + goto end; } if (nb_chan > 0) { - *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); + const size_t channel_size = sizeof(struct lttng_channel) + + sizeof(struct lttcomm_channel_extended); + struct lttcomm_channel_extended *channel_exts; + + payload_size = nb_chan * channel_size; + *channels = zmalloc(payload_size); if (*channels == NULL) { - ret = LTTNG_ERR_FATAL; - goto error; + ret = -LTTNG_ERR_FATAL; + goto end; } - list_lttng_channels(domain, session, *channels); + channel_exts = ((void *) *channels) + + (nb_chan * sizeof(struct lttng_channel)); + list_lttng_channels(domain, session, *channels, channel_exts); + } else { + *channels = NULL; } - return nb_chan; - -error: - /* Return negative value to differentiate return code */ - return -ret; + ret = payload_size; +end: + return ret; } /* * Command LTTNG_LIST_EVENTS processed by the client thread. */ -ssize_t cmd_list_events(int domain, struct ltt_session *session, - char *channel_name, struct lttng_event **events) +ssize_t cmd_list_events(enum lttng_domain_type domain, + struct ltt_session *session, char *channel_name, + struct lttng_event **events, size_t *total_size) { int ret = 0; ssize_t nb_event = 0; @@ -2649,14 +3041,16 @@ ssize_t cmd_list_events(int domain, struct ltt_session *session, case LTTNG_DOMAIN_KERNEL: if (session->kernel_session != NULL) { nb_event = list_lttng_kernel_events(channel_name, - session->kernel_session, events); + session->kernel_session, events, + total_size); } break; case LTTNG_DOMAIN_UST: { if (session->ust_session != NULL) { nb_event = list_lttng_ust_global_events(channel_name, - &session->ust_session->domain_global, events); + &session->ust_session->domain_global, events, + total_size); } break; } @@ -2670,7 +3064,12 @@ ssize_t cmd_list_events(int domain, struct ltt_session *session, rcu_read_lock(); cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, agt, node.node) { - nb_event = list_lttng_agent_events(agt, events); + if (agt->domain == domain) { + nb_event = list_lttng_agent_events( + agt, events, + total_size); + break; + } } rcu_read_unlock(); } @@ -2990,6 +3389,156 @@ error: return ret; } +/* + * Check if we can regenerate the metadata for this session. + * Only kernel, UST per-uid and non-live sessions are supported. + * + * Return 0 if the metadata can be generated, a LTTNG_ERR code otherwise. + */ +static +int check_metadata_regenerate_support(struct ltt_session *session) +{ + int ret; + + assert(session); + + if (session->live_timer != 0) { + ret = LTTNG_ERR_LIVE_SESSION; + goto end; + } + if (!session->active) { + ret = LTTNG_ERR_SESSION_NOT_STARTED; + goto end; + } + if (session->ust_session) { + switch (session->ust_session->buffer_type) { + case LTTNG_BUFFER_PER_UID: + break; + case LTTNG_BUFFER_PER_PID: + ret = LTTNG_ERR_PER_PID_SESSION; + goto end; + default: + assert(0); + ret = LTTNG_ERR_UNK; + goto end; + } + } + if (session->consumer->type == CONSUMER_DST_NET && + session->consumer->relay_minor_version < 8) { + ret = LTTNG_ERR_RELAYD_VERSION_FAIL; + goto end; + } + ret = 0; + +end: + return ret; +} + +static +int ust_metadata_regenerate(struct ltt_ust_session *usess) +{ + int ret = 0; + struct buffer_reg_uid *uid_reg = NULL; + struct buffer_reg_session *session_reg = NULL; + + rcu_read_lock(); + cds_list_for_each_entry(uid_reg, &usess->buffer_reg_uid_list, lnode) { + struct ust_registry_session *registry; + struct ust_registry_channel *chan; + struct lttng_ht_iter iter_chan; + + session_reg = uid_reg->registry; + registry = session_reg->reg.ust; + + pthread_mutex_lock(®istry->lock); + registry->metadata_len_sent = 0; + memset(registry->metadata, 0, registry->metadata_alloc_len); + registry->metadata_len = 0; + registry->metadata_version++; + ret = ust_metadata_session_statedump(registry, NULL, + registry->major, registry->minor); + if (ret) { + pthread_mutex_unlock(®istry->lock); + ERR("Failed to generate session metadata (err = %d)", + ret); + goto end; + } + cds_lfht_for_each_entry(registry->channels->ht, &iter_chan.iter, + chan, node.node) { + struct ust_registry_event *event; + struct lttng_ht_iter iter_event; + + ret = ust_metadata_channel_statedump(registry, chan); + if (ret) { + pthread_mutex_unlock(®istry->lock); + ERR("Failed to generate channel metadata " + "(err = %d)", ret); + goto end; + } + cds_lfht_for_each_entry(chan->ht->ht, &iter_event.iter, + event, node.node) { + ret = ust_metadata_event_statedump(registry, + chan, event); + if (ret) { + pthread_mutex_unlock(®istry->lock); + ERR("Failed to generate event metadata " + "(err = %d)", ret); + goto end; + } + } + } + pthread_mutex_unlock(®istry->lock); + } + +end: + rcu_read_unlock(); + return ret; +} + +/* + * Command LTTNG_METADATA_REGENERATE from the lttng-ctl library. + * + * Ask the consumer to truncate the existing metadata file(s) and + * then regenerate the metadata. Live and per-pid sessions are not + * supported and return an error. + * + * Return 0 on success or else a LTTNG_ERR code. + */ +int cmd_metadata_regenerate(struct ltt_session *session) +{ + int ret; + + assert(session); + + ret = check_metadata_regenerate_support(session); + if (ret) { + goto end; + } + + if (session->kernel_session) { + ret = kernctl_session_metadata_regenerate( + session->kernel_session->fd); + if (ret < 0) { + ERR("Failed to regenerate the kernel metadata"); + goto end; + } + } + + if (session->ust_session) { + ret = ust_metadata_regenerate(session->ust_session); + if (ret < 0) { + ERR("Failed to regenerate the UST metadata"); + goto end; + } + } + DBG("Cmd metadata regenerate for session %s", session->name); + ret = LTTNG_OK; + +end: + return ret; +} + + /* * Send relayd sockets from snapshot output to consumer. Ignore request if the * snapshot output is *not* set with a remote destination. @@ -3051,13 +3600,6 @@ static int record_kernel_snapshot(struct ltt_kernel_session *ksess, assert(output); assert(session); - /* Get the datetime for the snapshot output directory. */ - ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime, - sizeof(output->datetime)); - if (!ret) { - ret = LTTNG_ERR_INVALID; - goto error; - } /* * Copy kernel session sockets so we can communicate with the right @@ -3105,14 +3647,6 @@ static int record_ust_snapshot(struct ltt_ust_session *usess, assert(output); assert(session); - /* Get the datetime for the snapshot output directory. */ - ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime, - sizeof(output->datetime)); - if (!ret) { - ret = LTTNG_ERR_INVALID; - goto error; - } - /* * Copy UST session sockets so we can communicate with the right * consumer for the snapshot record command. @@ -3134,9 +3668,6 @@ static int record_ust_snapshot(struct ltt_ust_session *usess, case EINVAL: ret = LTTNG_ERR_INVALID; break; - case ENODATA: - ret = LTTNG_ERR_SNAPSHOT_NODATA; - break; default: ret = LTTNG_ERR_SNAPSHOT_FAIL; break; @@ -3254,12 +3785,21 @@ int cmd_snapshot_record(struct ltt_session *session, unsigned int use_tmp_output = 0; struct snapshot_output tmp_output; unsigned int snapshot_success = 0; + char datetime[16]; assert(session); assert(output); DBG("Cmd snapshot record for session %s", session->name); + /* Get the datetime for the snapshot output directory. */ + ret = utils_get_current_time_str("%Y%m%d-%H%M%S", datetime, + sizeof(datetime)); + if (!ret) { + ret = LTTNG_ERR_INVALID; + goto error; + } + /* * Permission denied to create an output if the session is not * set in no output mode. @@ -3290,138 +3830,100 @@ int cmd_snapshot_record(struct ltt_session *session, } /* Use the global session count for the temporary snapshot. */ tmp_output.nb_snapshot = session->snapshot.nb_snapshot; + + /* Use the global datetime */ + memcpy(tmp_output.datetime, datetime, sizeof(datetime)); use_tmp_output = 1; } - if (session->kernel_session) { - struct ltt_kernel_session *ksess = session->kernel_session; + if (use_tmp_output) { + int64_t nb_packets_per_stream; - if (use_tmp_output) { - int64_t nb_packets_per_stream; + 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; + goto error; + } - 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; + if (session->kernel_session) { + ret = record_kernel_snapshot(session->kernel_session, + &tmp_output, session, + wait, nb_packets_per_stream); + if (ret != LTTNG_OK) { goto error; } - ret = record_kernel_snapshot(ksess, &tmp_output, session, + } + + if (session->ust_session) { + ret = record_ust_snapshot(session->ust_session, + &tmp_output, session, wait, nb_packets_per_stream); if (ret != LTTNG_OK) { goto error; } - snapshot_success = 1; - } else { - struct snapshot_output *sout; - struct lttng_ht_iter iter; - - rcu_read_lock(); - cds_lfht_for_each_entry(session->snapshot.output_ht->ht, - &iter.iter, sout, node.node) { - int64_t nb_packets_per_stream; - - /* - * Make a local copy of the output and assign the possible - * temporary value given by the caller. - */ - memset(&tmp_output, 0, sizeof(tmp_output)); - memcpy(&tmp_output, sout, sizeof(tmp_output)); - - if (output->max_size != (uint64_t) -1ULL) { - tmp_output.max_size = output->max_size; - } + } - 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; - goto error; - } + snapshot_success = 1; + } else { + struct snapshot_output *sout; + struct lttng_ht_iter iter; - /* Use temporary name. */ - if (*output->name != '\0') { - strncpy(tmp_output.name, output->name, - sizeof(tmp_output.name)); - } + rcu_read_lock(); + cds_lfht_for_each_entry(session->snapshot.output_ht->ht, + &iter.iter, sout, node.node) { + int64_t nb_packets_per_stream; - tmp_output.nb_snapshot = session->snapshot.nb_snapshot; + /* + * Make a local copy of the output and assign the possible + * temporary value given by the caller. + */ + memset(&tmp_output, 0, sizeof(tmp_output)); + memcpy(&tmp_output, sout, sizeof(tmp_output)); - ret = record_kernel_snapshot(ksess, &tmp_output, - session, wait, nb_packets_per_stream); - if (ret != LTTNG_OK) { - rcu_read_unlock(); - goto error; - } - snapshot_success = 1; + if (output->max_size != (uint64_t) -1ULL) { + tmp_output.max_size = output->max_size; } - rcu_read_unlock(); - } - } - - if (session->ust_session) { - struct ltt_ust_session *usess = session->ust_session; - - if (use_tmp_output) { - int64_t nb_packets_per_stream; 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; + rcu_read_unlock(); goto error; } - ret = record_ust_snapshot(usess, &tmp_output, session, - wait, nb_packets_per_stream); - if (ret != LTTNG_OK) { - goto error; - } - snapshot_success = 1; - } else { - struct snapshot_output *sout; - struct lttng_ht_iter iter; - rcu_read_lock(); - cds_lfht_for_each_entry(session->snapshot.output_ht->ht, - &iter.iter, sout, node.node) { - int64_t nb_packets_per_stream; + /* Use temporary name. */ + if (*output->name != '\0') { + strncpy(tmp_output.name, output->name, + sizeof(tmp_output.name)); + } - /* - * Make a local copy of the output and assign the possible - * temporary value given by the caller. - */ - memset(&tmp_output, 0, sizeof(tmp_output)); - memcpy(&tmp_output, sout, sizeof(tmp_output)); + tmp_output.nb_snapshot = session->snapshot.nb_snapshot; + memcpy(tmp_output.datetime, datetime, sizeof(datetime)); - if (output->max_size != (uint64_t) -1ULL) { - tmp_output.max_size = output->max_size; - } - - 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; + if (session->kernel_session) { + ret = record_kernel_snapshot(session->kernel_session, + &tmp_output, session, + wait, nb_packets_per_stream); + if (ret != LTTNG_OK) { rcu_read_unlock(); goto error; } + } - /* Use temporary name. */ - if (*output->name != '\0') { - strncpy(tmp_output.name, output->name, - sizeof(tmp_output.name)); - } - - tmp_output.nb_snapshot = session->snapshot.nb_snapshot; - - ret = record_ust_snapshot(usess, &tmp_output, session, + if (session->ust_session) { + ret = record_ust_snapshot(session->ust_session, + &tmp_output, session, wait, nb_packets_per_stream); if (ret != LTTNG_OK) { rcu_read_unlock(); goto error; } - snapshot_success = 1; } - rcu_read_unlock(); + snapshot_success = 1; } + rcu_read_unlock(); } if (snapshot_success) {