/*
- * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
- * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
+ * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
*
- * 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
- * published by the Free Software Foundation.
+ * SPDX-License-Identifier: GPL-2.0-only
*
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#define _LGPL_SOURCE
#include <common/kernel-ctl/kernel-ctl.h>
#include <common/dynamic-buffer.h>
#include <common/buffer-view.h>
+#include <common/payload.h>
+#include <common/payload-view.h>
#include <common/trace-chunk.h>
#include <lttng/location-internal.h>
#include <lttng/trigger/trigger-internal.h>
#include <lttng/condition/condition.h>
+#include <lttng/condition/condition-internal.h>
+#include <lttng/condition/event-rule.h>
+#include <lttng/condition/event-rule-internal.h>
+#include <lttng/event-rule/event-rule.h>
+#include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/event-rule/uprobe-internal.h>
+#include <lttng/event-rule/tracepoint.h>
#include <lttng/action/action.h>
#include <lttng/channel.h>
#include <lttng/channel-internal.h>
#include <lttng/session-internal.h>
#include <lttng/userspace-probe-internal.h>
#include <lttng/session-descriptor-internal.h>
+#include <lttng/lttng-error.h>
+#include <lttng/tracker.h>
#include <common/string-utils/string-utils.h>
#include "channel.h"
#include "rotation-thread.h"
#include "timer.h"
#include "agent-thread.h"
+#include "tracker.h"
#include "cmd.h"
struct cmd_destroy_session_reply_context {
int reply_sock_fd;
bool implicit_rotation_on_destroy;
+ /*
+ * Indicates whether or not an error occurred while launching the
+ * destruction of a session.
+ */
+ enum lttng_error_code destruction_status;
};
static enum lttng_error_code wait_on_path(void *path);
static int validate_ust_event_name(const char *);
static int cmd_enable_event_internal(struct ltt_session *session,
- struct lttng_domain *domain,
+ const struct lttng_domain *domain,
char *channel_name, struct lttng_event *event,
char *filter_expression,
- struct lttng_filter_bytecode *filter,
+ struct lttng_bytecode *filter,
struct lttng_event_exclusion *exclusion,
int wpipe);
}
}
-static int increment_extended_len(const char *filter_expression,
- struct lttng_event_exclusion *exclusion,
- const struct lttng_userspace_probe_location *probe_location,
- size_t *extended_len)
-{
- int ret = 0;
-
- *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;
- }
-
- if (probe_location) {
- ret = lttng_userspace_probe_location_serialize(probe_location,
- NULL, NULL);
- if (ret < 0) {
- goto end;
- }
- *extended_len += ret;
- }
- ret = 0;
-end:
- return ret;
-}
-
static int append_extended_info(const char *filter_expression,
struct lttng_event_exclusion *exclusion,
struct lttng_userspace_probe_location *probe_location,
- void **extended_at)
+ struct lttng_payload *payload)
{
int ret = 0;
size_t filter_len = 0;
size_t nb_exclusions = 0;
size_t userspace_probe_location_len = 0;
- struct lttng_dynamic_buffer location_buffer;
- struct lttcomm_event_extended_header extended_header;
+ struct lttcomm_event_extended_header extended_header = {};
+ struct lttcomm_event_extended_header *p_extended_header;
+ const size_t original_payload_size = payload->buffer.size;
+
+ ret = lttng_dynamic_buffer_append(&payload->buffer, &extended_header,
+ sizeof(extended_header));
+ if (ret) {
+ goto end;
+ }
if (filter_expression) {
filter_len = strlen(filter_expression) + 1;
+ ret = lttng_dynamic_buffer_append(&payload->buffer,
+ filter_expression, filter_len);
+ if (ret) {
+ goto end;
+ }
}
if (exclusion) {
+ const size_t len = exclusion->count * LTTNG_SYMBOL_NAME_LEN;
+
nb_exclusions = exclusion->count;
+
+ ret = lttng_dynamic_buffer_append(
+ &payload->buffer, &exclusion->names, len);
+ if (ret) {
+ goto end;
+ }
}
if (probe_location) {
- lttng_dynamic_buffer_init(&location_buffer);
+ const size_t size_before_probe = payload->buffer.size;
+
ret = lttng_userspace_probe_location_serialize(probe_location,
- &location_buffer, NULL);
+ payload);
if (ret < 0) {
ret = -1;
goto end;
}
- userspace_probe_location_len = location_buffer.size;
- }
-
- /* Set header fields */
- extended_header.filter_len = filter_len;
- extended_header.nb_exclusions = nb_exclusions;
- extended_header.userspace_probe_location_len = userspace_probe_location_len;
- /* 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;
+ userspace_probe_location_len =
+ payload->buffer.size - size_before_probe;
}
- /* Copy exclusion names */
- if (exclusion) {
- size_t len = nb_exclusions * LTTNG_SYMBOL_NAME_LEN;
+ /* Set header fields */
+ p_extended_header = (struct lttcomm_event_extended_header *)
+ (payload->buffer.data + original_payload_size);
- memcpy(*extended_at, &exclusion->names, len);
- *extended_at += len;
- }
+ p_extended_header->filter_len = filter_len;
+ p_extended_header->nb_exclusions = nb_exclusions;
+ p_extended_header->userspace_probe_location_len =
+ userspace_probe_location_len;
- if (probe_location) {
- memcpy(*extended_at, location_buffer.data, location_buffer.size);
- *extended_at += location_buffer.size;
- lttng_dynamic_buffer_reset(&location_buffer);
- }
ret = 0;
end:
return ret;
* 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, size_t *total_size)
+ struct lttng_payload *payload)
{
- int i = 0, ret = 0;
- unsigned int nb_event = 0;
- struct agent_event *event;
- struct lttng_event *tmp_events = NULL;
+ int nb_events = 0, ret = 0;
+ const struct agent_event *agent_event;
struct lttng_ht_iter iter;
- size_t extended_len = 0;
- void *extended_at;
assert(agt);
- assert(events);
DBG3("Listing agent events");
rcu_read_lock();
- nb_event = lttng_ht_get_count(agt->events);
- rcu_read_unlock();
- if (nb_event == 0) {
- ret = nb_event;
- *total_size = 0;
- goto error;
- }
-
- /* 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) {
- ret = increment_extended_len(event->filter_expression, NULL, NULL,
- &extended_len);
+ cds_lfht_for_each_entry (
+ agt->events->ht, &iter.iter, agent_event, node.node) {
+ struct lttng_event event = {
+ .enabled = agent_event->enabled,
+ .loglevel = agent_event->loglevel_value,
+ .loglevel_type = agent_event->loglevel_type,
+ };
+
+ strncpy(event.name, agent_event->name, sizeof(event.name));
+ event.name[sizeof(event.name) - 1] = '\0';
+
+ ret = lttng_dynamic_buffer_append(
+ &payload->buffer, &event, sizeof(event));
if (ret) {
- DBG("Error computing the length of extended info message");
- ret = -LTTNG_ERR_FATAL;
- goto error;
+ ERR("Failed to append event to payload");
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
}
- }
- 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;
+ nb_events++;
}
- 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_value;
- tmp_events[i].loglevel_type = event->loglevel_type;
- i++;
-
- /* Append extended info */
- ret = append_extended_info(event->filter_expression, NULL, NULL,
- &extended_at);
+ cds_lfht_for_each_entry (
+ agt->events->ht, &iter.iter, agent_event, node.node) {
+ /* Append extended info. */
+ ret = append_extended_info(agent_event->filter_expression, NULL,
+ NULL, payload);
if (ret) {
- DBG("Error appending extended info message");
- ret = -LTTNG_ERR_FATAL;
- goto error;
+ ERR("Failed to append extended event info to payload");
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
}
}
- *events = tmp_events;
- ret = nb_event;
- assert(nb_event == i);
-
+ ret = nb_events;
end:
rcu_read_unlock();
return ret;
-error:
- free(tmp_events);
- goto end;
}
/*
*/
static int list_lttng_ust_global_events(char *channel_name,
struct ltt_ust_domain_global *ust_global,
- struct lttng_event **events, size_t *total_size)
+ struct lttng_payload *payload)
{
- int i = 0, ret = 0;
- unsigned int nb_event = 0;
+ int ret = 0;
+ unsigned int nb_events = 0;
struct lttng_ht_iter iter;
- struct lttng_ht_node_str *node;
- struct ltt_ust_channel *uchan;
- struct ltt_ust_event *uevent;
- struct lttng_event *tmp;
- size_t extended_len = 0;
- void *extended_at;
+ const struct lttng_ht_node_str *node;
+ const struct ltt_ust_channel *uchan;
+ const struct ltt_ust_event *uevent;
DBG("Listing UST global events for channel %s", channel_name);
rcu_read_lock();
- lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter);
+ lttng_ht_lookup(ust_global->channels, (void *) channel_name, &iter);
node = lttng_ht_iter_get_node_str(&iter);
if (node == NULL) {
ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node);
- nb_event = lttng_ht_get_count(uchan->events);
- if (nb_event == 0) {
- ret = nb_event;
- *total_size = 0;
- goto end;
- }
-
- DBG3("Listing UST global %d events", nb_event);
+ DBG3("Listing UST global events");
- /* Compute required extended infos size */
cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) {
+ struct lttng_event event = {};
+
if (uevent->internal) {
- nb_event--;
continue;
}
- ret = increment_extended_len(uevent->filter_expression,
- uevent->exclusion, NULL, &extended_len);
- if (ret) {
- DBG("Error computing the length of extended info message");
- ret = -LTTNG_ERR_FATAL;
- goto end;
- }
- }
- 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 end;
- }
+ strncpy(event.name, uevent->attr.name, sizeof(event.name));
+ event.name[sizeof(event.name) - 1] = '\0';
- 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;
+ event.enabled = uevent->enabled;
switch (uevent->attr.instrumentation) {
case LTTNG_UST_TRACEPOINT:
- tmp[i].type = LTTNG_EVENT_TRACEPOINT;
+ event.type = LTTNG_EVENT_TRACEPOINT;
break;
case LTTNG_UST_PROBE:
- tmp[i].type = LTTNG_EVENT_PROBE;
+ event.type = LTTNG_EVENT_PROBE;
break;
case LTTNG_UST_FUNCTION:
- tmp[i].type = LTTNG_EVENT_FUNCTION;
+ event.type = LTTNG_EVENT_FUNCTION;
break;
}
- tmp[i].loglevel = uevent->attr.loglevel;
+ event.loglevel = uevent->attr.loglevel;
switch (uevent->attr.loglevel_type) {
case LTTNG_UST_LOGLEVEL_ALL:
- tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
+ event.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
break;
case LTTNG_UST_LOGLEVEL_RANGE:
- tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
+ event.loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
break;
case LTTNG_UST_LOGLEVEL_SINGLE:
- tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
+ event.loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
break;
}
+
if (uevent->filter) {
- tmp[i].filter = 1;
+ event.filter = 1;
}
+
if (uevent->exclusion) {
- tmp[i].exclusion = 1;
+ event.exclusion = 1;
}
- i++;
- /* Append extended info */
+ ret = lttng_dynamic_buffer_append(&payload->buffer, &event, sizeof(event));
+ if (ret) {
+ ERR("Failed to append event to payload");
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ nb_events++;
+ }
+
+ cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) {
+ /* Append extended info. */
ret = append_extended_info(uevent->filter_expression,
- uevent->exclusion, NULL, &extended_at);
+ uevent->exclusion, NULL, payload);
if (ret) {
- DBG("Error appending extended info message");
+ ERR("Failed to append extended event info to payload");
ret = -LTTNG_ERR_FATAL;
goto end;
}
}
- ret = nb_event;
- *events = tmp;
+ ret = nb_events;
end:
rcu_read_unlock();
return ret;
*/
static int list_lttng_kernel_events(char *channel_name,
struct ltt_kernel_session *kernel_session,
- struct lttng_event **events, size_t *total_size)
+ struct lttng_payload *payload)
{
- int i = 0, ret;
+ int ret;
unsigned int nb_event;
- struct ltt_kernel_event *event;
- struct ltt_kernel_channel *kchan;
- size_t extended_len = 0;
- void *extended_at;
+ const struct ltt_kernel_event *kevent;
+ const struct ltt_kernel_channel *kchan;
kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session);
if (kchan == NULL) {
DBG("Listing events for channel %s", kchan->channel->name);
- if (nb_event == 0) {
- *total_size = 0;
- *events = NULL;
- goto end;
- }
-
- /* Compute required extended infos size */
- cds_list_for_each_entry(event, &kchan->events_list.head, list) {
- ret = increment_extended_len(event->filter_expression, NULL,
- event->userspace_probe_location,
- &extended_len);
- if (ret) {
- DBG("Error computing the length of extended info message");
- ret = -LTTNG_ERR_FATAL;
- goto error;
- }
- }
-
- *total_size = nb_event * sizeof(struct lttng_event) + extended_len;
- *events = zmalloc(*total_size);
- if (*events == NULL) {
- ret = -LTTNG_ERR_FATAL;
- goto error;
- }
+ /* Kernel channels */
+ cds_list_for_each_entry(kevent, &kchan->events_list.head , list) {
+ struct lttng_event event = {};
- extended_at = ((void *) *events) +
- nb_event * sizeof(struct lttng_event);
+ strncpy(event.name, kevent->event->name, sizeof(event.name));
+ event.name[sizeof(event.name) - 1] = '\0';
+ event.enabled = kevent->enabled;
+ event.filter = (unsigned char) !!kevent->filter_expression;
- /* 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) {
+ switch (kevent->event->instrumentation) {
case LTTNG_KERNEL_TRACEPOINT:
- (*events)[i].type = LTTNG_EVENT_TRACEPOINT;
+ event.type = LTTNG_EVENT_TRACEPOINT;
break;
case LTTNG_KERNEL_KRETPROBE:
- (*events)[i].type = LTTNG_EVENT_FUNCTION;
- memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe,
+ event.type = LTTNG_EVENT_FUNCTION;
+ memcpy(&event.attr.probe, &kevent->event->u.kprobe,
sizeof(struct lttng_kernel_kprobe));
break;
case LTTNG_KERNEL_KPROBE:
- (*events)[i].type = LTTNG_EVENT_PROBE;
- memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe,
+ event.type = LTTNG_EVENT_PROBE;
+ memcpy(&event.attr.probe, &kevent->event->u.kprobe,
sizeof(struct lttng_kernel_kprobe));
break;
case LTTNG_KERNEL_UPROBE:
- (*events)[i].type = LTTNG_EVENT_USERSPACE_PROBE;
+ event.type = LTTNG_EVENT_USERSPACE_PROBE;
break;
case LTTNG_KERNEL_FUNCTION:
- (*events)[i].type = LTTNG_EVENT_FUNCTION;
- memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace,
+ event.type = LTTNG_EVENT_FUNCTION;
+ memcpy(&event.attr.ftrace, &kevent->event->u.ftrace,
sizeof(struct lttng_kernel_function));
break;
case LTTNG_KERNEL_NOOP:
- (*events)[i].type = LTTNG_EVENT_NOOP;
+ event.type = LTTNG_EVENT_NOOP;
break;
case LTTNG_KERNEL_SYSCALL:
- (*events)[i].type = LTTNG_EVENT_SYSCALL;
+ event.type = LTTNG_EVENT_SYSCALL;
break;
case LTTNG_KERNEL_ALL:
/* fall-through. */
assert(0);
break;
}
- i++;
- /* Append extended info */
- ret = append_extended_info(event->filter_expression, NULL,
- event->userspace_probe_location, &extended_at);
+ ret = lttng_dynamic_buffer_append(
+ &payload->buffer, &event, sizeof(event));
+ if (ret) {
+ ERR("Failed to append event to payload");
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
+ }
+ }
+
+ cds_list_for_each_entry(kevent, &kchan->events_list.head , list) {
+ /* Append extended info. */
+ ret = append_extended_info(kevent->filter_expression, NULL,
+ kevent->userspace_probe_location, payload);
if (ret) {
DBG("Error appending extended info message");
ret = -LTTNG_ERR_FATAL;
end:
return nb_event;
-
error:
- /* Negate the error code to differentiate the size from an error */
- return -ret;
+ return ret;
}
/*
ret = lttng_strncpy(consumer->dst.session_root_path,
uri->dst.path,
sizeof(consumer->dst.session_root_path));
+ if (ret) {
+ ret_code = LTTNG_ERR_FATAL;
+ goto error;
+ }
consumer->type = CONSUMER_DST_LOCAL;
break;
}
/* Create socket for control stream. */
if (uri->stype == LTTNG_STREAM_CONTROL) {
+ uint64_t result_flags;
+
DBG3("Creating relayd stream socket from URI");
/* Check relayd version */
}
consumer->relay_major_version = rsock->major;
consumer->relay_minor_version = rsock->minor;
+ ret = relayd_get_configuration(rsock, 0,
+ &result_flags);
+ if (ret < 0) {
+ ERR("Unable to get relayd configuration");
+ status = LTTNG_ERR_RELAYD_CONNECT_FAIL;
+ goto close_sock;
+ }
+ if (result_flags & LTTCOMM_RELAYD_CONFIGURATION_FLAG_CLEAR_ALLOWED) {
+ consumer->relay_allows_clear = true;
+ }
} else if (uri->stype == LTTNG_STREAM_DATA) {
DBG3("Creating relayd data socket from URI");
} else {
struct consumer_socket *consumer_sock,
const char *session_name, const char *hostname,
const char *base_path, int session_live_timer,
- const uint64_t *current_chunk_id,
+ const uint64_t *current_chunk_id,
time_t session_creation_time,
bool session_name_contains_creation_time)
{
struct ltt_kernel_session *ksess;
struct consumer_socket *socket;
struct lttng_ht_iter iter;
- LTTNG_OPTIONAL(uint64_t) current_chunk_id = {};
+ LTTNG_OPTIONAL(uint64_t) current_chunk_id = {};
- assert(session);
+ assert(session);
usess = session->ust_session;
ksess = session->kernel_session;
DBG("Setting relayd for session %s", session->name);
+ rcu_read_lock();
if (session->current_trace_chunk) {
enum lttng_trace_chunk_status status = lttng_trace_chunk_get_id(
session->current_trace_chunk, ¤t_chunk_id.value);
}
}
- rcu_read_lock();
-
if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET
&& usess->consumer->enabled) {
/* For each consumer socket, send relayd sockets */
usess->consumer->relay_major_version;
session->consumer->relay_minor_version =
usess->consumer->relay_minor_version;
+ session->consumer->relay_allows_clear =
+ usess->consumer->relay_allows_clear;
}
if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET
ksess->consumer->relay_major_version;
session->consumer->relay_minor_version =
ksess->consumer->relay_minor_version;
+ session->consumer->relay_allows_clear =
+ ksess->consumer->relay_allows_clear;
}
error:
/*
* Start a kernel session by opening all necessary streams.
*/
-static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe)
+int start_kernel_session(struct ltt_kernel_session *ksess)
{
int ret;
struct ltt_kernel_channel *kchan;
}
/* Quiescent wait after starting trace */
- kernel_wait_quiescent(wpipe);
+ kernel_wait_quiescent();
ksess->active = 1;
return ret;
}
-/*
- * Command LTTNG_DISABLE_CHANNEL processed by the client thread.
- */
-int cmd_disable_channel(struct ltt_session *session,
- enum lttng_domain_type domain, char *channel_name)
+int stop_kernel_session(struct ltt_kernel_session *ksess)
{
+ struct ltt_kernel_channel *kchan;
+ bool error_occurred = false;
int ret;
- struct ltt_ust_session *usess;
-
- usess = session->ust_session;
-
- rcu_read_lock();
-
- switch (domain) {
- case LTTNG_DOMAIN_KERNEL:
- {
- ret = channel_kernel_disable(session->kernel_session,
- channel_name);
- if (ret != LTTNG_OK) {
- goto error;
- }
- kernel_wait_quiescent(kernel_tracer_fd);
- break;
+ if (!ksess || !ksess->active) {
+ return LTTNG_OK;
}
- case LTTNG_DOMAIN_UST:
- {
- struct ltt_ust_channel *uchan;
- struct lttng_ht *chan_ht;
-
- chan_ht = usess->domain_global.channels;
-
- uchan = trace_ust_find_channel_by_name(chan_ht, channel_name);
- if (uchan == NULL) {
- ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
- goto error;
- }
+ DBG("Stopping kernel tracing");
- ret = channel_ust_disable(usess, uchan);
- if (ret != LTTNG_OK) {
- goto error;
- }
- break;
- }
- default:
- ret = LTTNG_ERR_UNKNOWN_DOMAIN;
+ ret = kernel_stop_session(ksess);
+ if (ret < 0) {
+ ret = LTTNG_ERR_KERN_STOP_FAIL;
goto error;
}
- ret = LTTNG_OK;
-
-error:
- rcu_read_unlock();
- return ret;
-}
-
-/*
- * Command LTTNG_TRACK_PID processed by the client thread.
- *
- * Called with session lock held.
- */
-int cmd_track_pid(struct ltt_session *session, enum lttng_domain_type domain,
- int pid)
-{
- int ret;
-
- rcu_read_lock();
-
- switch (domain) {
- case LTTNG_DOMAIN_KERNEL:
- {
- struct ltt_kernel_session *ksess;
-
- ksess = session->kernel_session;
+ kernel_wait_quiescent();
- ret = kernel_track_pid(ksess, pid);
- if (ret != LTTNG_OK) {
- goto error;
+ /* Flush metadata after stopping (if exists) */
+ if (ksess->metadata_stream_fd >= 0) {
+ ret = kernel_metadata_flush_buffer(ksess->metadata_stream_fd);
+ if (ret < 0) {
+ ERR("Kernel metadata flush failed");
+ error_occurred = true;
}
-
- kernel_wait_quiescent(kernel_tracer_fd);
- break;
}
- case LTTNG_DOMAIN_UST:
- {
- struct ltt_ust_session *usess;
-
- usess = session->ust_session;
- ret = trace_ust_track_pid(usess, pid);
- if (ret != LTTNG_OK) {
- goto error;
+ /* Flush all buffers after stopping */
+ cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) {
+ ret = kernel_flush_buffer(kchan);
+ if (ret < 0) {
+ ERR("Kernel flush buffer error");
+ error_occurred = true;
}
- break;
- }
- default:
- ret = LTTNG_ERR_UNKNOWN_DOMAIN;
- goto error;
}
- ret = LTTNG_OK;
-
+ ksess->active = 0;
+ if (error_occurred) {
+ ret = LTTNG_ERR_UNK;
+ } else {
+ ret = LTTNG_OK;
+ }
error:
- rcu_read_unlock();
return ret;
}
/*
- * Command LTTNG_UNTRACK_PID processed by the client thread.
- *
- * Called with session lock held.
+ * Command LTTNG_DISABLE_CHANNEL processed by the client thread.
*/
-int cmd_untrack_pid(struct ltt_session *session, enum lttng_domain_type domain,
- int pid)
+int cmd_disable_channel(struct ltt_session *session,
+ enum lttng_domain_type domain, char *channel_name)
{
int ret;
+ struct ltt_ust_session *usess;
+
+ usess = session->ust_session;
rcu_read_lock();
switch (domain) {
case LTTNG_DOMAIN_KERNEL:
{
- struct ltt_kernel_session *ksess;
-
- ksess = session->kernel_session;
-
- ret = kernel_untrack_pid(ksess, pid);
+ ret = channel_kernel_disable(session->kernel_session,
+ channel_name);
if (ret != LTTNG_OK) {
goto error;
}
- kernel_wait_quiescent(kernel_tracer_fd);
+ kernel_wait_quiescent();
break;
}
case LTTNG_DOMAIN_UST:
{
- struct ltt_ust_session *usess;
+ struct ltt_ust_channel *uchan;
+ struct lttng_ht *chan_ht;
- usess = session->ust_session;
+ chan_ht = usess->domain_global.channels;
+
+ uchan = trace_ust_find_channel_by_name(chan_ht, channel_name);
+ if (uchan == NULL) {
+ ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
+ goto error;
+ }
- ret = trace_ust_untrack_pid(usess, pid);
+ ret = channel_ust_disable(usess, uchan);
if (ret != LTTNG_OK) {
goto error;
}
* The wpipe arguments is used as a notifier for the kernel thread.
*/
int cmd_enable_channel(struct ltt_session *session,
- struct lttng_domain *domain, struct lttng_channel *attr, int wpipe)
+ const struct lttng_domain *domain, const struct lttng_channel *_attr, int wpipe)
{
int ret;
struct ltt_ust_session *usess = session->ust_session;
struct lttng_ht *chan_ht;
size_t len;
+ struct lttng_channel attr;
assert(session);
- assert(attr);
+ assert(_attr);
assert(domain);
- len = lttng_strnlen(attr->name, sizeof(attr->name));
+ attr = *_attr;
+ len = lttng_strnlen(attr.name, sizeof(attr.name));
/* Validate channel name */
- if (attr->name[0] == '.' ||
- memchr(attr->name, '/', len) != NULL) {
+ if (attr.name[0] == '.' ||
+ memchr(attr.name, '/', len) != NULL) {
ret = LTTNG_ERR_INVALID_CHANNEL_NAME;
goto end;
}
- DBG("Enabling channel %s for session %s", attr->name, session->name);
+ DBG("Enabling channel %s for session %s", attr.name, session->name);
rcu_read_lock();
* beacons for inactive streams.
*/
if (session->live_timer > 0) {
- attr->attr.live_timer_interval = session->live_timer;
- attr->attr.switch_timer_interval = 0;
+ attr.attr.live_timer_interval = session->live_timer;
+ attr.attr.switch_timer_interval = 0;
}
/* Check for feature support */
switch (domain->type) {
case LTTNG_DOMAIN_KERNEL:
{
- if (kernel_supports_ring_buffer_snapshot_sample_positions(kernel_tracer_fd) != 1) {
+ if (kernel_supports_ring_buffer_snapshot_sample_positions() != 1) {
/* Sampling position of buffer is not supported */
WARN("Kernel tracer does not support buffer monitoring. "
"Setting the monitor interval timer to 0 "
"(disabled) for channel '%s' of session '%s'",
- attr-> name, session->name);
- lttng_channel_set_monitor_timer_interval(attr, 0);
+ attr.name, session->name);
+ lttng_channel_set_monitor_timer_interval(&attr, 0);
}
break;
}
{
struct ltt_kernel_channel *kchan;
- kchan = trace_kernel_get_channel_by_name(attr->name,
+ kchan = trace_kernel_get_channel_by_name(attr.name,
session->kernel_session);
if (kchan == NULL) {
if (session->snapshot.nb_output > 0 ||
session->snapshot_mode) {
/* Enforce mmap output for snapshot sessions. */
- attr->attr.output = LTTNG_EVENT_MMAP;
+ attr.attr.output = LTTNG_EVENT_MMAP;
}
- ret = channel_kernel_create(session->kernel_session, attr, wpipe);
- if (attr->name[0] != '\0') {
+ ret = channel_kernel_create(session->kernel_session, &attr, wpipe);
+ if (attr.name[0] != '\0') {
session->kernel_session->has_non_default_channel = 1;
}
} else {
goto error;
}
- kernel_wait_quiescent(kernel_tracer_fd);
+ kernel_wait_quiescent();
break;
}
case LTTNG_DOMAIN_UST:
* adhered to.
*/
if (domain->type == LTTNG_DOMAIN_JUL) {
- if (strncmp(attr->name, DEFAULT_JUL_CHANNEL_NAME,
+ 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,
+ 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,
+ 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);
+ uchan = trace_ust_find_channel_by_name(chan_ht, attr.name);
if (uchan == NULL) {
- ret = channel_ust_create(usess, attr, domain->buf_type);
- if (attr->name[0] != '\0') {
+ ret = channel_ust_create(usess, &attr, domain->buf_type);
+ if (attr.name[0] != '\0') {
usess->has_non_default_channel = 1;
}
} else {
goto error;
}
- if (ret == LTTNG_OK && attr->attr.output != LTTNG_EVENT_MMAP) {
+ if (ret == LTTNG_OK && attr.attr.output != LTTNG_EVENT_MMAP) {
session->has_non_mmap_channel = true;
}
error:
return ret;
}
+enum lttng_error_code cmd_process_attr_tracker_get_tracking_policy(
+ struct ltt_session *session,
+ enum lttng_domain_type domain,
+ enum lttng_process_attr process_attr,
+ enum lttng_tracking_policy *policy)
+{
+ enum lttng_error_code ret_code = LTTNG_OK;
+ const struct process_attr_tracker *tracker;
+
+ switch (domain) {
+ case LTTNG_DOMAIN_KERNEL:
+ if (!session->kernel_session) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+ tracker = kernel_get_process_attr_tracker(
+ session->kernel_session, process_attr);
+ break;
+ case LTTNG_DOMAIN_UST:
+ if (!session->ust_session) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+ tracker = trace_ust_get_process_attr_tracker(
+ session->ust_session, process_attr);
+ break;
+ default:
+ ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN;
+ goto end;
+ }
+ if (tracker) {
+ *policy = process_attr_tracker_get_tracking_policy(tracker);
+ } else {
+ ret_code = LTTNG_ERR_INVALID;
+ }
+end:
+ return ret_code;
+}
+
+enum lttng_error_code cmd_process_attr_tracker_set_tracking_policy(
+ struct ltt_session *session,
+ enum lttng_domain_type domain,
+ enum lttng_process_attr process_attr,
+ enum lttng_tracking_policy policy)
+{
+ enum lttng_error_code ret_code = LTTNG_OK;
+
+ switch (policy) {
+ case LTTNG_TRACKING_POLICY_INCLUDE_SET:
+ case LTTNG_TRACKING_POLICY_EXCLUDE_ALL:
+ case LTTNG_TRACKING_POLICY_INCLUDE_ALL:
+ break;
+ default:
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ switch (domain) {
+ case LTTNG_DOMAIN_KERNEL:
+ if (!session->kernel_session) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret_code = kernel_process_attr_tracker_set_tracking_policy(
+ session->kernel_session, process_attr, policy);
+ break;
+ case LTTNG_DOMAIN_UST:
+ if (!session->ust_session) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret_code = trace_ust_process_attr_tracker_set_tracking_policy(
+ session->ust_session, process_attr, policy);
+ break;
+ default:
+ ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN;
+ break;
+ }
+end:
+ return ret_code;
+}
+
+enum lttng_error_code cmd_process_attr_tracker_inclusion_set_add_value(
+ struct ltt_session *session,
+ enum lttng_domain_type domain,
+ enum lttng_process_attr process_attr,
+ const struct process_attr_value *value)
+{
+ enum lttng_error_code ret_code = LTTNG_OK;
+
+ switch (domain) {
+ case LTTNG_DOMAIN_KERNEL:
+ if (!session->kernel_session) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret_code = kernel_process_attr_tracker_inclusion_set_add_value(
+ session->kernel_session, process_attr, value);
+ break;
+ case LTTNG_DOMAIN_UST:
+ if (!session->ust_session) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret_code = trace_ust_process_attr_tracker_inclusion_set_add_value(
+ session->ust_session, process_attr, value);
+ break;
+ default:
+ ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN;
+ break;
+ }
+end:
+ return ret_code;
+}
+
+enum lttng_error_code cmd_process_attr_tracker_inclusion_set_remove_value(
+ struct ltt_session *session,
+ enum lttng_domain_type domain,
+ enum lttng_process_attr process_attr,
+ const struct process_attr_value *value)
+{
+ enum lttng_error_code ret_code = LTTNG_OK;
+
+ switch (domain) {
+ case LTTNG_DOMAIN_KERNEL:
+ if (!session->kernel_session) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret_code = kernel_process_attr_tracker_inclusion_set_remove_value(
+ session->kernel_session, process_attr, value);
+ break;
+ case LTTNG_DOMAIN_UST:
+ if (!session->ust_session) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret_code = trace_ust_process_attr_tracker_inclusion_set_remove_value(
+ session->ust_session, process_attr, value);
+ break;
+ default:
+ ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN;
+ break;
+ }
+end:
+ return ret_code;
+}
+
+enum lttng_error_code cmd_process_attr_tracker_get_inclusion_set(
+ struct ltt_session *session,
+ enum lttng_domain_type domain,
+ enum lttng_process_attr process_attr,
+ struct lttng_process_attr_values **values)
+{
+ enum lttng_error_code ret_code = LTTNG_OK;
+ const struct process_attr_tracker *tracker;
+ enum process_attr_tracker_status status;
+
+ switch (domain) {
+ case LTTNG_DOMAIN_KERNEL:
+ if (!session->kernel_session) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+ tracker = kernel_get_process_attr_tracker(
+ session->kernel_session, process_attr);
+ break;
+ case LTTNG_DOMAIN_UST:
+ if (!session->ust_session) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+ tracker = trace_ust_get_process_attr_tracker(
+ session->ust_session, process_attr);
+ break;
+ default:
+ ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN;
+ goto end;
+ }
+
+ if (!tracker) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ status = process_attr_tracker_get_inclusion_set(tracker, values);
+ switch (status) {
+ case PROCESS_ATTR_TRACKER_STATUS_OK:
+ ret_code = LTTNG_OK;
+ break;
+ case PROCESS_ATTR_TRACKER_STATUS_INVALID_TRACKING_POLICY:
+ ret_code = LTTNG_ERR_PROCESS_ATTR_TRACKER_INVALID_TRACKING_POLICY;
+ break;
+ case PROCESS_ATTR_TRACKER_STATUS_ERROR:
+ ret_code = LTTNG_ERR_NOMEM;
+ break;
+ default:
+ ret_code = LTTNG_ERR_UNK;
+ break;
+ }
+
+end:
+ return ret_code;
+}
+
/*
* Command LTTNG_DISABLE_EVENT processed by the client thread.
*/
int cmd_disable_event(struct ltt_session *session,
- enum lttng_domain_type domain, char *channel_name,
- struct lttng_event *event)
+ enum lttng_domain_type domain, const char *channel_name,
+ const struct lttng_event *event)
{
int ret;
- char *event_name;
+ const char *event_name;
DBG("Disable event command for event \'%s\'", event->name);
goto error_unlock;
}
- kernel_wait_quiescent(kernel_tracer_fd);
+ kernel_wait_quiescent();
break;
}
case LTTNG_DOMAIN_UST:
* Command LTTNG_ADD_CONTEXT processed by the client thread.
*/
int cmd_add_context(struct ltt_session *session, enum lttng_domain_type domain,
- char *channel_name, struct lttng_event_context *ctx, int kwpipe)
+ char *channel_name, const 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;
* enable the events through which all "agent" events are funeled.
*/
static int _cmd_enable_event(struct ltt_session *session,
- struct lttng_domain *domain,
+ const struct lttng_domain *domain,
char *channel_name, struct lttng_event *event,
char *filter_expression,
- struct lttng_filter_bytecode *filter,
+ struct lttng_bytecode *filter,
struct lttng_event_exclusion *exclusion,
int wpipe, bool internal_event)
{
case LTTNG_EVENT_ALL:
{
char *filter_expression_a = NULL;
- struct lttng_filter_bytecode *filter_a = NULL;
+ struct lttng_bytecode *filter_a = NULL;
/*
* We need to duplicate filter_expression and filter,
goto error;
}
- kernel_wait_quiescent(kernel_tracer_fd);
+ kernel_wait_quiescent();
break;
}
case LTTNG_DOMAIN_UST:
*/
ret = validate_ust_event_name(event->name);
if (ret) {
- WARN("Userspace event name %s failed validation.",
+ WARN("Userspace event name %s failed validation.",
event->name);
ret = LTTNG_ERR_INVALID_EVENT_NAME;
goto error;
{
char *filter_expression_copy = NULL;
- struct lttng_filter_bytecode *filter_copy = NULL;
+ struct lttng_bytecode *filter_copy = NULL;
if (filter) {
const size_t filter_size = sizeof(
- struct lttng_filter_bytecode)
+ struct lttng_bytecode)
+ filter->len;
filter_copy = zmalloc(filter_size);
* Command LTTNG_ENABLE_EVENT processed by the client thread.
* We own filter, exclusion, and filter_expression.
*/
-int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain,
+int cmd_enable_event(struct ltt_session *session,
+ const struct lttng_domain *domain,
char *channel_name, struct lttng_event *event,
char *filter_expression,
- struct lttng_filter_bytecode *filter,
+ struct lttng_bytecode *filter,
struct lttng_event_exclusion *exclusion,
int wpipe)
{
* reserved names.
*/
static int cmd_enable_event_internal(struct ltt_session *session,
- struct lttng_domain *domain,
+ const struct lttng_domain *domain,
char *channel_name, struct lttng_event *event,
char *filter_expression,
- struct lttng_filter_bytecode *filter,
+ struct lttng_bytecode *filter,
struct lttng_event_exclusion *exclusion,
int wpipe)
{
switch (domain) {
case LTTNG_DOMAIN_KERNEL:
- nb_events = kernel_list_events(kernel_tracer_fd, events);
+ nb_events = kernel_list_events(events);
if (nb_events < 0) {
ret = LTTNG_ERR_KERN_LIST_FAIL;
goto error;
return syscall_table_list(events);
}
-/*
- * Command LTTNG_LIST_TRACKER_PIDS processed by the client thread.
- *
- * Called with session lock held.
- */
-ssize_t cmd_list_tracker_pids(struct ltt_session *session,
- enum lttng_domain_type domain, int32_t **pids)
-{
- int ret;
- ssize_t nr_pids = 0;
-
- switch (domain) {
- case LTTNG_DOMAIN_KERNEL:
- {
- struct ltt_kernel_session *ksess;
-
- ksess = session->kernel_session;
- nr_pids = kernel_list_tracker_pids(ksess, pids);
- if (nr_pids < 0) {
- ret = LTTNG_ERR_KERN_LIST_FAIL;
- goto error;
- }
- break;
- }
- case LTTNG_DOMAIN_UST:
- {
- struct ltt_ust_session *usess;
-
- usess = session->ust_session;
- nr_pids = trace_ust_list_tracker_pids(usess, pids);
- if (nr_pids < 0) {
- ret = LTTNG_ERR_UST_LIST_FAIL;
- goto error;
- }
- break;
- }
- case LTTNG_DOMAIN_LOG4J:
- case LTTNG_DOMAIN_JUL:
- case LTTNG_DOMAIN_PYTHON:
- default:
- ret = LTTNG_ERR_UND;
- goto error;
- }
-
- return nr_pids;
-
-error:
- /* Return negative value to differentiate return code */
- return -ret;
-}
-
/*
* Command LTTNG_START_TRACE processed by the client thread.
*
unsigned long nb_chan = 0;
struct ltt_kernel_session *ksession;
struct ltt_ust_session *usess;
+ const bool session_rotated_after_last_stop =
+ session->rotated_after_last_stop;
+ const bool session_cleared_after_last_stop =
+ session->cleared_after_last_stop;
assert(session);
/* Is the session already started? */
if (session->active) {
ret = LTTNG_ERR_TRACE_ALREADY_STARTED;
+ /* Perform nothing */
+ goto end;
+ }
+
+ if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING &&
+ !session->current_trace_chunk) {
+ /*
+ * A rotation was launched while the session was stopped and
+ * it has not been completed yet. It is not possible to start
+ * the session since starting the session here would require a
+ * rotation from "NULL" to a new trace chunk. That rotation
+ * would overlap with the ongoing rotation, which is not
+ * supported.
+ */
+ WARN("Refusing to start session \"%s\" as a rotation launched after the last \"stop\" is still ongoing",
+ session->name);
+ ret = LTTNG_ERR_ROTATION_PENDING;
goto error;
}
goto error;
}
- if (session->output_traces && !session->current_trace_chunk &&
- session_output_supports_trace_chunks(session)) {
- struct lttng_trace_chunk *trace_chunk;
+ session->active = 1;
+ session->rotated_after_last_stop = false;
+ session->cleared_after_last_stop = false;
+ if (session->output_traces && !session->current_trace_chunk) {
+ if (!session->has_been_started) {
+ struct lttng_trace_chunk *trace_chunk;
- trace_chunk = session_create_new_trace_chunk(
- session, NULL, NULL, NULL);
- if (!trace_chunk) {
- ret = LTTNG_ERR_CREATE_DIR_FAIL;
- goto error;
- }
- assert(!session->current_trace_chunk);
- ret = session_set_trace_chunk(session, trace_chunk, NULL);
- lttng_trace_chunk_put(trace_chunk);
- if (ret) {
- ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER;
- goto error;
+ DBG("Creating initial trace chunk of session \"%s\"",
+ session->name);
+ trace_chunk = session_create_new_trace_chunk(
+ session, NULL, NULL, NULL);
+ if (!trace_chunk) {
+ ret = LTTNG_ERR_CREATE_DIR_FAIL;
+ goto error;
+ }
+ assert(!session->current_trace_chunk);
+ ret = session_set_trace_chunk(session, trace_chunk,
+ NULL);
+ lttng_trace_chunk_put(trace_chunk);
+ if (ret) {
+ ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER;
+ goto error;
+ }
+ } else {
+ DBG("Rotating session \"%s\" from its current \"NULL\" trace chunk to a new chunk",
+ session->name);
+ /*
+ * Rotate existing streams into the new chunk.
+ * This is a "quiet" rotation has no client has
+ * explicitly requested this operation.
+ *
+ * There is also no need to wait for the rotation
+ * to complete as it will happen immediately. No data
+ * was produced as the session was stopped, so the
+ * rotation should happen on reception of the command.
+ */
+ ret = cmd_rotate_session(session, NULL, true,
+ LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION);
+ if (ret != LTTNG_OK) {
+ goto error;
+ }
}
}
/* Kernel tracing */
if (ksession != NULL) {
DBG("Start kernel tracing session %s", session->name);
- ret = start_kernel_session(ksession, kernel_tracer_fd);
+ ret = start_kernel_session(ksession);
if (ret != LTTNG_OK) {
goto error;
}
}
}
- /* Flag this after a successful start. */
- session->has_been_started = 1;
- session->active = 1;
+ /*
+ * Open a packet in every stream of the session to ensure that viewers
+ * can correctly identify the boundaries of the periods during which
+ * tracing was active for this session.
+ */
+ ret = session_open_packets(session);
+ if (ret != LTTNG_OK) {
+ goto error;
+ }
/*
* Clear the flag that indicates that a rotation was done while the
ret = LTTNG_OK;
error:
+ if (ret == LTTNG_OK) {
+ /* Flag this after a successful start. */
+ session->has_been_started |= 1;
+ } else {
+ session->active = 0;
+ /* Restore initial state on error. */
+ session->rotated_after_last_stop =
+ session_rotated_after_last_stop;
+ session->cleared_after_last_stop =
+ session_cleared_after_last_stop;
+ }
+end:
return ret;
}
int cmd_stop_trace(struct ltt_session *session)
{
int ret;
- struct ltt_kernel_channel *kchan;
struct ltt_kernel_session *ksession;
struct ltt_ust_session *usess;
- bool error_occurred = false;
assert(session);
- DBG("Begin stop session %s (id %" PRIu64 ")", session->name, session->id);
+ DBG("Begin stop session \"%s\" (id %" PRIu64 ")", session->name, session->id);
/* Short cut */
ksession = session->kernel_session;
usess = session->ust_session;
goto error;
}
- /* Kernel tracer */
- if (ksession && ksession->active) {
- DBG("Stop kernel tracing");
-
- ret = kernel_stop_session(ksession);
- if (ret < 0) {
- ret = LTTNG_ERR_KERN_STOP_FAIL;
- goto error;
- }
-
- kernel_wait_quiescent(kernel_tracer_fd);
-
- /* Flush metadata after stopping (if exists) */
- if (ksession->metadata_stream_fd >= 0) {
- ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd);
- if (ret < 0) {
- ERR("Kernel metadata flush failed");
- }
- }
-
- /* Flush all buffers after stopping */
- cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) {
- ret = kernel_flush_buffer(kchan);
- if (ret < 0) {
- ERR("Kernel flush buffer error");
- }
- }
-
- ksession->active = 0;
- DBG("Kernel session stopped %s (id %" PRIu64 ")", session->name,
- session->id);
+ ret = stop_kernel_session(ksession);
+ if (ret != LTTNG_OK) {
+ goto error;
}
if (usess && usess->active) {
}
}
+ DBG("Completed stop session \"%s\" (id %" PRIu64 ")", session->name,
+ session->id);
/* Flag inactive after a successful stop. */
session->active = 0;
- ret = !error_occurred ? LTTNG_OK : LTTNG_ERR_UNK;
+ ret = LTTNG_OK;
+
+error:
+ return ret;
+}
+
+/*
+ * Set the base_path of the session only if subdir of a control uris is set.
+ * Return LTTNG_OK on success, otherwise LTTNG_ERR_*.
+ */
+static int set_session_base_path_from_uris(struct ltt_session *session,
+ size_t nb_uri,
+ struct lttng_uri *uris)
+{
+ int ret;
+ size_t i;
+
+ for (i = 0; i < nb_uri; i++) {
+ if (uris[i].stype != LTTNG_STREAM_CONTROL ||
+ uris[i].subdir[0] == '\0') {
+ /* Not interested in these URIs */
+ continue;
+ }
+
+ if (session->base_path != NULL) {
+ free(session->base_path);
+ session->base_path = NULL;
+ }
+ /* Set session base_path */
+ session->base_path = strdup(uris[i].subdir);
+ if (!session->base_path) {
+ PERROR("Failed to copy base path \"%s\" to session \"%s\"",
+ uris[i].subdir, session->name);
+ ret = LTTNG_ERR_NOMEM;
+ goto error;
+ }
+ DBG2("Setting base path \"%s\" for session \"%s\"",
+ session->base_path, session->name);
+ }
+ ret = LTTNG_OK;
error:
return ret;
}
goto error;
}
+ /*
+ * Set the session base path if any. This is done inside
+ * cmd_set_consumer_uri to preserve backward compatibility of the
+ * previous session creation api vs the session descriptor api.
+ */
+ ret = set_session_base_path_from_uris(session, nb_uri, uris);
+ if (ret != LTTNG_OK) {
+ goto error;
+ }
+
/* Set the "global" consumer URIs */
for (i = 0; i < nb_uri; i++) {
- ret = add_uri_to_consumer(session,
- session->consumer,
- &uris[i], LTTNG_DOMAIN_NONE);
+ ret = add_uri_to_consumer(session, session->consumer, &uris[i],
+ LTTNG_DOMAIN_NONE);
if (ret != LTTNG_OK) {
goto error;
}
const char *session_name;
struct ltt_session *new_session = NULL;
enum lttng_session_descriptor_status descriptor_status;
- const char *base_path;
session_lock_list();
if (home_path) {
ret_code = LTTNG_ERR_INVALID;
goto end;
}
- ret = lttng_session_descriptor_get_base_path(descriptor, &base_path);
- if (ret) {
- ret_code = LTTNG_ERR_INVALID;
- goto end;
- }
+
ret_code = session_create(session_name, creds->uid, creds->gid,
- base_path, &new_session);
+ &new_session);
if (ret_code != LTTNG_OK) {
goto end;
}
enum lttng_error_code ret_code;
lttng_dynamic_buffer_init(&payload);
- if (cmd_ctx->lsm->u.create_session.home_dir_size >=
+ if (cmd_ctx->lsm.u.create_session.home_dir_size >=
LTTNG_PATH_MAX) {
ret_code = LTTNG_ERR_INVALID;
goto error;
}
- if (cmd_ctx->lsm->u.create_session.session_descriptor_size >
+ if (cmd_ctx->lsm.u.create_session.session_descriptor_size >
LTTNG_SESSION_DESCRIPTOR_MAX_LEN) {
ret_code = LTTNG_ERR_INVALID;
goto error;
}
- payload_size = cmd_ctx->lsm->u.create_session.home_dir_size +
- cmd_ctx->lsm->u.create_session.session_descriptor_size;
+ payload_size = cmd_ctx->lsm.u.create_session.home_dir_size +
+ cmd_ctx->lsm.u.create_session.session_descriptor_size;
ret = lttng_dynamic_buffer_set_size(&payload, payload_size);
if (ret) {
ret_code = LTTNG_ERR_NOMEM;
home_dir_view = lttng_buffer_view_from_dynamic_buffer(
&payload,
0,
- cmd_ctx->lsm->u.create_session.home_dir_size);
+ cmd_ctx->lsm.u.create_session.home_dir_size);
session_descriptor_view = lttng_buffer_view_from_dynamic_buffer(
&payload,
- cmd_ctx->lsm->u.create_session.home_dir_size,
- cmd_ctx->lsm->u.create_session.session_descriptor_size);
+ cmd_ctx->lsm.u.create_session.home_dir_size,
+ cmd_ctx->lsm.u.create_session.session_descriptor_size);
ret = lttng_session_descriptor_create_from_buffer(
&session_descriptor_view, &session_descriptor);
struct lttng_trace_archive_location *location = NULL;
struct lttcomm_lttng_msg llm = {
.cmd_type = LTTNG_DESTROY_SESSION,
- .ret_code = LTTNG_OK,
+ .ret_code = reply_context->destruction_status,
.pid = UINT32_MAX,
.cmd_header_size =
sizeof(struct lttcomm_session_destroy_command_header),
lttng_dynamic_buffer_init(&payload);
ret = lttng_dynamic_buffer_append(&payload, &llm, sizeof(llm));
- if (ret) {
+ if (ret) {
ERR("Failed to append session destruction message");
goto error;
- }
+ }
cmd_header.rotation_state =
(int32_t) (reply_context->implicit_rotation_on_destroy ?
int *sock_fd)
{
int ret;
+ enum lttng_error_code destruction_last_error = LTTNG_OK;
struct cmd_destroy_session_reply_context *reply_context = NULL;
if (sock_fd) {
/* Carry on with the destruction of the session. */
ERR("Failed to stop session \"%s\" as part of its destruction: %s",
session->name, lttng_strerror(-ret));
+ destruction_last_error = ret;
}
}
session)) {
ERR("Failed to stop the \"rotation schedule\" timer of session %s",
session->name);
+ destruction_last_error = LTTNG_ERR_TIMER_STOP_ERROR;
}
}
session->rotate_size = 0;
}
- if (session->most_recent_chunk_id.is_set &&
- session->most_recent_chunk_id.value != 0 &&
- session->current_trace_chunk && session->output_traces) {
+ if (session->rotated && session->current_trace_chunk && session->output_traces) {
/*
* Perform a last rotation on destruction if rotations have
* occurred during the session's lifetime.
*/
- ret = cmd_rotate_session(session, NULL, false);
+ ret = cmd_rotate_session(session, NULL, false,
+ LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED);
if (ret != LTTNG_OK) {
ERR("Failed to perform an implicit rotation as part of the destruction of session \"%s\": %s",
session->name, lttng_strerror(-ret));
+ destruction_last_error = -ret;
}
- if (reply_context) {
+ if (reply_context) {
reply_context->implicit_rotation_on_destroy = true;
- }
- } else if (session->has_been_started && session->current_trace_chunk &&
- session_output_supports_trace_chunks(session)) {
+ }
+ } else if (session->has_been_started && session->current_trace_chunk) {
/*
* The user has not triggered a session rotation. However, to
* ensure all data has been consumed, the session is rotated
* emitted and no renaming of the current trace chunk takes
* place.
*/
- ret = cmd_rotate_session(session, NULL, true);
- if (ret != LTTNG_OK) {
+ ret = cmd_rotate_session(session, NULL, true,
+ LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION);
+ /*
+ * Rotation operations may not be supported by the kernel
+ * tracer. Hence, do not consider this implicit rotation as
+ * a session destruction error. The library has already stopped
+ * the session and waited for pending data; there is nothing
+ * left to do but complete the destruction of the session.
+ */
+ if (ret != LTTNG_OK &&
+ ret != -LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL) {
ERR("Failed to perform a quiet rotation as part of the destruction of session \"%s\": %s",
- session->name, lttng_strerror(-ret));
+ session->name, lttng_strerror(ret));
+ destruction_last_error = -ret;
}
}
*/
session_destroy(session);
if (reply_context) {
+ reply_context->destruction_status = destruction_last_error;
ret = session_add_destroy_notifier(session,
cmd_destroy_session_reply,
(void *) reply_context);
} else {
*sock_fd = -1;
}
- }
- ret = LTTNG_OK;
+ }
+ ret = LTTNG_OK;
end:
return ret;
}
*/
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)
+ struct lttng_payload *payload)
{
int ret = 0;
- ssize_t nb_event = 0;
+ ssize_t nb_events = 0;
+ struct lttcomm_event_command_header cmd_header = {};
+ const size_t cmd_header_offset = payload->buffer.size;
+
+ ret = lttng_dynamic_buffer_append(
+ &payload->buffer, &cmd_header, sizeof(cmd_header));
+ if (ret) {
+ ret = LTTNG_ERR_NOMEM;
+ goto error;
+ }
switch (domain) {
case LTTNG_DOMAIN_KERNEL:
if (session->kernel_session != NULL) {
- nb_event = list_lttng_kernel_events(channel_name,
- session->kernel_session, events,
- total_size);
+ nb_events = list_lttng_kernel_events(channel_name,
+ session->kernel_session, payload);
}
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,
- total_size);
+ nb_events = list_lttng_ust_global_events(channel_name,
+ &session->ust_session->domain_global,
+ payload);
}
break;
}
cds_lfht_for_each_entry(session->ust_session->agents->ht,
&iter.iter, agt, node.node) {
if (agt->domain == domain) {
- nb_event = list_lttng_agent_events(
- agt, events,
- total_size);
+ nb_events = list_lttng_agent_events(
+ agt, payload);
break;
}
}
goto error;
}
- return nb_event;
+ ((struct lttcomm_event_command_header *) (payload->buffer.data +
+ cmd_header_offset))->nb_events = (uint32_t) nb_events;
+
+ return nb_events;
error:
/* Return negative value to differentiate return code */
unsigned int i = 0;
struct ltt_session *session;
struct ltt_session_list *list = session_get_list();
- struct lttng_session_extended *extended =
+ struct lttng_session_extended *extended =
(typeof(extended)) (&sessions[session_count]);
DBG("Getting all available session for UID %d GID %d",
/*
* Only list the sessions the user can control.
*/
- if (!session_access_ok(session, uid, gid) ||
+ if (!session_access_ok(session, uid) ||
session->destroyed) {
session_put(session);
continue;
* Return LTTNG_OK on success or else a LTTNG_ERR code.
*/
int cmd_snapshot_add_output(struct ltt_session *session,
- struct lttng_snapshot_output *output, uint32_t *id)
+ const struct lttng_snapshot_output *output, uint32_t *id)
{
int ret;
struct snapshot_output *new_output;
* Return LTTNG_OK on success or else a LTTNG_ERR code.
*/
int cmd_snapshot_del_output(struct ltt_session *session,
- struct lttng_snapshot_output *output)
+ const struct lttng_snapshot_output *output)
{
int ret;
struct snapshot_output *sout = NULL;
return ret;
}
+/*
+ * On success LTTNG_OK. On error, returns lttng_error code.
+ */
+static enum lttng_error_code prepare_trigger_object(struct lttng_trigger *trigger, const struct lttng_credentials *cmd_creds)
+{
+ enum lttng_error_code ret;
+ /* Internal object of the trigger might have to "generate" and
+ * "populate" internal field e.g filter bytecode
+ */
+ struct lttng_condition *condition = NULL;
+
+ condition = lttng_trigger_get_condition(trigger);
+ if (!condition) {
+ ret = LTTNG_ERR_INVALID_TRIGGER;
+ goto end;
+ }
+
+ switch (lttng_condition_get_type(condition)) {
+ case LTTNG_CONDITION_TYPE_EVENT_RULE_HIT:
+ {
+ struct lttng_event_rule *event_rule;
+ lttng_condition_event_rule_get_rule_mutable(
+ condition, &event_rule);
+ ret = lttng_event_rule_generate_filter_bytecode(
+ event_rule, lttng_credentials_get_uid(cmd_creds), lttng_credentials_get_gid(cmd_creds));
+ if (ret != LTTNG_OK) {
+ goto end;
+ }
+
+ /* Generate the capture bytecode set */
+ ret = lttng_condition_event_rule_generate_capture_descriptor_bytecode_set(
+ condition, &trigger->capture_bytecode_set);
+ if (ret != LTTNG_OK) {
+ goto end;
+ }
+
+ ret = LTTNG_OK;
+ break;
+ }
+ default:
+ {
+ ret = LTTNG_OK;
+ break;
+ }
+ }
+
+end:
+ return ret;
+}
+
int cmd_register_trigger(struct command_ctx *cmd_ctx, int sock,
- struct notification_thread_handle *notification_thread)
+ struct notification_thread_handle *notification_thread,
+ struct lttng_trigger **return_trigger)
{
int ret;
size_t trigger_len;
ssize_t sock_recv_len;
struct lttng_trigger *trigger = NULL;
- struct lttng_buffer_view view;
- struct lttng_dynamic_buffer trigger_buffer;
+ struct lttng_payload trigger_payload;
+ struct lttng_credentials cmd_creds = {
+ .uid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.uid),
+ .gid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.gid),
+ };
- lttng_dynamic_buffer_init(&trigger_buffer);
- trigger_len = (size_t) cmd_ctx->lsm->u.trigger.length;
- ret = lttng_dynamic_buffer_set_size(&trigger_buffer, trigger_len);
+ lttng_payload_init(&trigger_payload);
+ trigger_len = (size_t) cmd_ctx->lsm.u.trigger.length;
+ ret = lttng_dynamic_buffer_set_size(
+ &trigger_payload.buffer, trigger_len);
if (ret) {
ret = LTTNG_ERR_NOMEM;
goto end;
}
- sock_recv_len = lttcomm_recv_unix_sock(sock, trigger_buffer.data,
- trigger_len);
+ sock_recv_len = lttcomm_recv_unix_sock(
+ sock, trigger_payload.buffer.data, trigger_len);
if (sock_recv_len < 0 || sock_recv_len != trigger_len) {
ERR("Failed to receive \"register trigger\" command payload");
/* TODO: should this be a new error enum ? */
goto end;
}
- view = lttng_buffer_view_from_dynamic_buffer(&trigger_buffer, 0, -1);
- if (lttng_trigger_create_from_buffer(&view, &trigger) !=
- trigger_len) {
- ERR("Invalid trigger payload received in \"register trigger\" command");
- ret = LTTNG_ERR_INVALID_TRIGGER;
+ /* Receive fds, if any. */
+ if (cmd_ctx->lsm.fd_count > 0) {
+ ret = lttcomm_recv_payload_fds_unix_sock(
+ sock, cmd_ctx->lsm.fd_count, &trigger_payload);
+ if (ret > 0 && ret != cmd_ctx->lsm.fd_count * sizeof(int)) {
+ ret = LTTNG_ERR_INVALID_PROTOCOL;
+ goto end;
+ } else if (ret <= 0) {
+ ret = LTTNG_ERR_FATAL;
+ goto end;
+ }
+ }
+
+ /* Deserialize trigger. */
+ {
+ struct lttng_payload_view view =
+ lttng_payload_view_from_payload(
+ &trigger_payload, 0, -1);
+
+ if (lttng_trigger_create_from_payload(&view, &trigger) !=
+ trigger_len) {
+ ERR("Invalid trigger payload received in \"register trigger\" command");
+ ret = LTTNG_ERR_INVALID_TRIGGER;
+ goto end;
+ }
+ }
+
+ /*
+ * Validate the trigger credentials against the command credentials.
+ * Only the root user can register a trigger with non-matching
+ * credentials.
+ */
+ if (!lttng_credentials_is_equal_uid(
+ lttng_trigger_get_credentials(trigger),
+ &cmd_creds)) {
+ if (lttng_credentials_get_uid(&cmd_creds) != 0) {
+ ERR("Trigger credentials do not match the command credentials");
+ ret = LTTNG_ERR_INVALID_TRIGGER;
+ goto end;
+ }
+ }
+
+ /*
+ * Since we return the trigger object, take a reference to it
+ * Caller is responsible for calling lttng_destroy_trigger on it.
+ * This thread does not OWN the trigger.
+ */
+ lttng_trigger_get(trigger);
+
+ /* Prepare internal trigger object if needed on reception.
+ * Handles also special treatment for certain internal object of the
+ * trigger (e.g uprobe event rule binary fd.
+ */
+ ret = prepare_trigger_object(trigger, &cmd_creds);
+ if (ret != LTTNG_OK) {
goto end;
}
+ /* Inform the notification thread */
ret = notification_thread_command_register_trigger(notification_thread,
trigger);
- /* Ownership of trigger was transferred. */
+ if (ret != LTTNG_OK) {
+ goto end;
+ }
+
+ /* Synchronize tracers, only if needed */
+ /* TODO: maybe extract somewhere else */
+ {
+ struct lttng_condition *condition = NULL;
+ condition = lttng_trigger_get_condition(trigger);
+ if (!condition) {
+ ret = LTTNG_ERR_INVALID_TRIGGER;
+ goto end;
+ }
+
+ if (lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_EVENT_RULE_HIT) {
+ const struct lttng_event_rule *rule = NULL;
+ (void) lttng_condition_event_rule_get_rule(condition, &rule);
+ if (!rule) {
+ ret = LTTNG_ERR_INVALID_TRIGGER;
+ goto end;
+ }
+ if (lttng_event_rule_get_domain_type(rule) == LTTNG_DOMAIN_KERNEL) {
+ /* TODO: get the token value from the
+ * notification thread and only perform an
+ * enable and a disable.... This is NOT
+ * OPTIMIZED AT ALL
+ */
+ ret = kernel_register_trigger(trigger, &cmd_creds);
+ if (ret != LTTNG_OK) {
+ enum lttng_error_code notif_thread_unregister_ret =
+ notification_thread_command_unregister_trigger(
+ notification_thread,
+ trigger);
+ if (notif_thread_unregister_ret != LTTNG_OK) {
+ ERR("Error unregistering notification thread trigger after kernel registration failure.");
+ }
+ goto end;
+
+ }
+ } else {
+ /* TODO: get the token value from the
+ * notification thread and only perform an
+ * enable and a disable.... This is NOT
+ * OPTIMIZED AT ALL
+ */
+ ust_app_global_update_all_tokens();
+ /* Agent handling */
+ if (lttng_event_rule_is_agent(rule)) {
+ struct agent *agt;
+ const char *pattern;
+ enum lttng_domain_type domain_type;
+ domain_type = lttng_event_rule_get_domain_type(
+ rule);
+ (void) lttng_event_rule_tracepoint_get_pattern(
+ rule, &pattern);
+ agt = trigger_find_agent(domain_type);
+ if (!agt) {
+ agt = agent_create(domain_type);
+ if (!agt) {
+ ret = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+ agent_add(agt, trigger_agents_ht_by_domain);
+ }
+
+ ret = trigger_agent_enable(
+ trigger, agt);
+ if (ret != LTTNG_OK) {
+ goto end;
+ }
+ }
+ }
+ }
+ }
+
+ /* Return an image of the updated object to the client */
+ *return_trigger = trigger;
+ /* Ownership of trigger was transferred to caller. */
trigger = NULL;
end:
lttng_trigger_destroy(trigger);
- lttng_dynamic_buffer_reset(&trigger_buffer);
+ lttng_payload_reset(&trigger_payload);
return ret;
}
size_t trigger_len;
ssize_t sock_recv_len;
struct lttng_trigger *trigger = NULL;
- struct lttng_buffer_view view;
- struct lttng_dynamic_buffer trigger_buffer;
+ struct lttng_payload trigger_payload;
+ struct lttng_credentials cmd_creds = {
+ .uid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.uid),
+ .gid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.gid),
+ };
- lttng_dynamic_buffer_init(&trigger_buffer);
- trigger_len = (size_t) cmd_ctx->lsm->u.trigger.length;
- ret = lttng_dynamic_buffer_set_size(&trigger_buffer, trigger_len);
+ lttng_payload_init(&trigger_payload);
+ trigger_len = (size_t) cmd_ctx->lsm.u.trigger.length;
+ ret = lttng_dynamic_buffer_set_size(
+ &trigger_payload.buffer, trigger_len);
if (ret) {
ret = LTTNG_ERR_NOMEM;
goto end;
}
- sock_recv_len = lttcomm_recv_unix_sock(sock, trigger_buffer.data,
- trigger_len);
+ sock_recv_len = lttcomm_recv_unix_sock(
+ sock, trigger_payload.buffer.data, trigger_len);
if (sock_recv_len < 0 || sock_recv_len != trigger_len) {
ERR("Failed to receive \"unregister trigger\" command payload");
/* TODO: should this be a new error enum ? */
goto end;
}
- view = lttng_buffer_view_from_dynamic_buffer(&trigger_buffer, 0, -1);
- if (lttng_trigger_create_from_buffer(&view, &trigger) !=
- trigger_len) {
- ERR("Invalid trigger payload received in \"unregister trigger\" command");
- ret = LTTNG_ERR_INVALID_TRIGGER;
+ /* Receive fds, if any. */
+ if (cmd_ctx->lsm.fd_count > 0) {
+ ret = lttcomm_recv_payload_fds_unix_sock(
+ sock, cmd_ctx->lsm.fd_count, &trigger_payload);
+ if (ret > 0 && ret != cmd_ctx->lsm.fd_count * sizeof(int)) {
+ ret = LTTNG_ERR_INVALID_PROTOCOL;
+ goto end;
+ } else if (ret <= 0) {
+ ret = LTTNG_ERR_FATAL;
+ goto end;
+ }
+ }
+
+ {
+ struct lttng_payload_view view =
+ lttng_payload_view_from_payload(
+ &trigger_payload, 0, -1);
+
+ if (lttng_trigger_create_from_payload(&view, &trigger) !=
+ trigger_len) {
+ ERR("Invalid trigger payload received in \"unregister trigger\" command");
+ ret = LTTNG_ERR_INVALID_TRIGGER;
+ goto end;
+ }
+ }
+
+ /*
+ * Validate the trigger credentials against the command credentials.
+ * Only the root user can unregister a trigger with non-matching
+ * credentials.
+ */
+ if (!lttng_credentials_is_equal_uid(
+ lttng_trigger_get_credentials(trigger),
+ &cmd_creds)) {
+ if (lttng_credentials_get_uid(&cmd_creds) != 0) {
+ ERR("Trigger credentials do not match the command credentials");
+ ret = LTTNG_ERR_INVALID_TRIGGER;
+ goto end;
+ }
+ }
+
+ ret = prepare_trigger_object(trigger, &cmd_creds);
+ if (ret != LTTNG_OK) {
goto end;
}
ret = notification_thread_command_unregister_trigger(notification_thread,
trigger);
+
+ /* Synchronize tracers, only if needed */
+ /* TODO: maybe extract somewhere else */
+ {
+ struct lttng_condition *condition = NULL;
+ condition = lttng_trigger_get_condition(trigger);
+ if (!condition) {
+ ret = LTTNG_ERR_INVALID_TRIGGER;
+ goto end;
+ }
+
+ if (lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_EVENT_RULE_HIT) {
+ const struct lttng_event_rule *rule = NULL;
+ (void) lttng_condition_event_rule_get_rule(condition, &rule);
+ if (!rule) {
+ ret = LTTNG_ERR_INVALID_TRIGGER;
+ goto end;
+ }
+ if (lttng_event_rule_get_domain_type(rule) == LTTNG_DOMAIN_KERNEL) {
+ /* TODO: get the token value from the
+ * notification thread and only perform an
+ * enable and a disable.... This is NOT
+ * OPTIMIZED AT ALL
+ */
+ ret = kernel_unregister_trigger(trigger);
+ } else {
+ /* TODO: get the token value from the
+ * notification thread and only perform an
+ * enable and a disable.... This is NOT
+ * OPTIMIZED AT ALL
+ */
+ ust_app_global_update_all_tokens();
+ if (lttng_event_rule_is_agent(rule)) {
+ struct agent *agt;
+ const char *pattern;
+ enum lttng_domain_type domain_type;
+
+ domain_type = lttng_event_rule_get_domain_type(
+ rule);
+ (void) lttng_event_rule_tracepoint_get_pattern(
+ rule, &pattern);
+
+ agt = trigger_find_agent(domain_type);
+ if (!agt) {
+ ret = LTTNG_ERR_UST_EVENT_NOT_FOUND;
+ goto end;
+ }
+ ret = trigger_agent_disable(
+ trigger, agt);
+ if (ret != LTTNG_OK) {
+ goto end;
+ }
+ }
+ }
+ }
+ }
+
end:
lttng_trigger_destroy(trigger);
- lttng_dynamic_buffer_reset(&trigger_buffer);
+ lttng_payload_reset(&trigger_payload);
return ret;
}
+int cmd_list_triggers(struct command_ctx *cmd_ctx,
+ struct notification_thread_handle *notification_thread,
+ struct lttng_triggers **return_triggers)
+{
+ int ret = 0;
+ enum lttng_error_code ret_code;
+ struct lttng_triggers *triggers = NULL;
+
+ /* Get list of token trigger from the notification thread here */
+ ret_code = notification_thread_command_list_triggers(notification_thread, cmd_ctx->creds.uid, &triggers);
+ if (ret_code != LTTNG_OK) {
+ ret = ret_code;
+ goto end;
+ }
+
+ /* Return a "view" of the current triggers */
+ *return_triggers = triggers;
+ triggers = NULL;
+ ret = LTTNG_OK;
+end:
+ lttng_triggers_destroy(triggers);
+ return ret;
+}
/*
* Send relayd sockets from snapshot output to consumer. Ignore request if the
* snapshot output is *not* set with a remote destination.
}
cur_nb_packets++;
}
- if (!cur_nb_packets) {
+ if (!cur_nb_packets && size_left != max_size) {
/* Not enough room to grab one packet of each stream, error. */
return -1;
}
session->kernel_session->consumer;
snapshot_kernel_consumer_output =
consumer_copy_output(snapshot_output->consumer);
+ strcpy(snapshot_kernel_consumer_output->chunk_path,
+ snapshot_chunk_name);
ret = consumer_copy_sockets(snapshot_kernel_consumer_output,
original_kernel_consumer_output);
if (ret < 0) {
original_ust_consumer_output = session->ust_session->consumer;
snapshot_ust_consumer_output =
consumer_copy_output(snapshot_output->consumer);
+ strcpy(snapshot_ust_consumer_output->chunk_path,
+ snapshot_chunk_name);
ret = consumer_copy_sockets(snapshot_ust_consumer_output,
original_ust_consumer_output);
if (ret < 0) {
snapshot_output->max_size);
if (nb_packets_per_stream < 0) {
ret_code = LTTNG_ERR_MAX_SIZE_INVALID;
- goto error;
+ goto error_close_trace_chunk;
}
if (session->kernel_session) {
snapshot_kernel_consumer_output, session,
wait, nb_packets_per_stream);
if (ret_code != LTTNG_OK) {
- goto error;
+ goto error_close_trace_chunk;
}
}
snapshot_ust_consumer_output, session,
wait, nb_packets_per_stream);
if (ret_code != LTTNG_OK) {
- goto error;
+ goto error_close_trace_chunk;
}
}
- if (session_close_trace_chunk(
- session, session->current_trace_chunk, NULL)) {
+error_close_trace_chunk:
+ if (session_set_trace_chunk(session, NULL, &snapshot_trace_chunk)) {
+ ERR("Failed to release the current trace chunk of session \"%s\"",
+ session->name);
+ ret_code = LTTNG_ERR_UNK;
+ }
+
+ if (session_close_trace_chunk(session, snapshot_trace_chunk,
+ LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION, NULL)) {
/*
* Don't goto end; make sure the chunk is closed for the session
* to allow future snapshots.
session->name);
ret_code = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER;
}
- if (session_set_trace_chunk(session, NULL, NULL)) {
- ERR("Failed to release the current trace chunk of session \"%s\"",
- session->name);
- ret_code = LTTNG_ERR_UNK;
- }
error:
if (original_ust_consumer_output) {
session->ust_session->consumer = original_ust_consumer_output;
* Return LTTNG_OK on success or else a LTTNG_ERR code.
*/
int cmd_snapshot_record(struct ltt_session *session,
- struct lttng_snapshot_output *output, int wait)
+ const struct lttng_snapshot_output *output, int wait)
{
enum lttng_error_code cmd_ret = LTTNG_OK;
int ret;
*/
int cmd_rotate_session(struct ltt_session *session,
struct lttng_rotate_session_return *rotate_return,
- bool quiet_rotation)
+ bool quiet_rotation,
+ enum lttng_trace_chunk_command_type command)
{
int ret;
uint64_t ongoing_rotation_chunk_id;
struct lttng_trace_chunk *chunk_being_archived = NULL;
struct lttng_trace_chunk *new_trace_chunk = NULL;
enum lttng_trace_chunk_status chunk_status;
+ bool failed_to_rotate = false;
+ enum lttng_error_code rotation_fail_code = LTTNG_OK;
assert(session);
}
/* Unsupported feature in lttng-relayd before 2.11. */
- if (session->consumer->type == CONSUMER_DST_NET &&
+ if (!quiet_rotation && session->consumer->type == CONSUMER_DST_NET &&
(session->consumer->relay_major_version == 2 &&
session->consumer->relay_minor_version < 11)) {
cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_RELAY;
goto end;
}
+ /* Unsupported feature in lttng-modules before 2.8 (lack of sequence number). */
+ if (session->kernel_session && !kernel_supports_ring_buffer_packet_sequence_number()) {
+ cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL;
+ goto end;
+ }
+
if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) {
DBG("Refusing to launch a rotation; a rotation is already in progress for session %s",
session->name);
goto end;
}
- session->rotation_state = LTTNG_ROTATION_STATE_ONGOING;
+ /*
+ * After a stop followed by a clear, disallow following rotations a they would
+ * generate empty chunks.
+ */
+ if (session->cleared_after_last_stop) {
+ DBG("Session \"%s\" was already cleared after stop, refusing rotation",
+ session->name);
+ cmd_ret = LTTNG_ERR_ROTATION_AFTER_STOP_CLEAR;
+ goto end;
+ }
if (session->active) {
new_trace_chunk = session_create_new_trace_chunk(session, NULL,
cmd_ret = LTTNG_ERR_CREATE_DIR_FAIL;
goto error;
}
- }
+ }
- /* The current trace chunk becomes the chunk being archived. */
+ /*
+ * The current trace chunk becomes the chunk being archived.
+ *
+ * After this point, "chunk_being_archived" must absolutely
+ * be closed on the consumer(s), otherwise it will never be
+ * cleaned-up, which will result in a leak.
+ */
ret = session_set_trace_chunk(session, new_trace_chunk,
&chunk_being_archived);
if (ret) {
goto error;
}
- assert(chunk_being_archived);
- chunk_status = lttng_trace_chunk_get_id(chunk_being_archived,
- &ongoing_rotation_chunk_id);
- assert(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK);
-
if (session->kernel_session) {
cmd_ret = kernel_rotate_session(session);
if (cmd_ret != LTTNG_OK) {
- goto error;
+ failed_to_rotate = true;
+ rotation_fail_code = cmd_ret;
}
}
if (session->ust_session) {
cmd_ret = ust_app_rotate_session(session);
if (cmd_ret != LTTNG_OK) {
+ failed_to_rotate = true;
+ rotation_fail_code = cmd_ret;
+ }
+ }
+
+ if (!session->active) {
+ session->rotated_after_last_stop = true;
+ }
+
+ if (!chunk_being_archived) {
+ DBG("Rotating session \"%s\" from a \"NULL\" trace chunk to a new trace chunk, skipping completion check",
+ session->name);
+ if (failed_to_rotate) {
+ cmd_ret = rotation_fail_code;
goto error;
}
+ cmd_ret = LTTNG_OK;
+ goto end;
}
+ session->rotation_state = LTTNG_ROTATION_STATE_ONGOING;
+ chunk_status = lttng_trace_chunk_get_id(chunk_being_archived,
+ &ongoing_rotation_chunk_id);
+ assert(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK);
+
ret = session_close_trace_chunk(session, chunk_being_archived,
- quiet_rotation ?
- NULL :
- &((enum lttng_trace_chunk_command_type){
- LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED}));
+ command, session->last_chunk_path);
if (ret) {
cmd_ret = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER;
goto error;
}
+ if (failed_to_rotate) {
+ cmd_ret = rotation_fail_code;
+ goto error;
+ }
+
session->quiet_rotation = quiet_rotation;
ret = timer_session_rotation_pending_check_start(session,
DEFAULT_ROTATE_PENDING_TIMER);
goto error;
}
- if (!session->active) {
- session->rotated_after_last_stop = true;
- }
-
if (rotate_return) {
rotate_return->rotation_id = ongoing_rotation_chunk_id;
}
switch (rotation_state) {
case LTTNG_ROTATION_STATE_NO_ROTATION:
- DBG("Reporting that no rotation has occured within the lifetime of session \"%s\"",
+ DBG("Reporting that no rotation has occurred within the lifetime of session \"%s\"",
session->name);
goto end;
case LTTNG_ROTATION_STATE_EXPIRED:
sizeof(info_return->location.local.absolute_path);
info_return->location_type =
(int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_LOCAL;
+ fmt_ret = asprintf(&chunk_path,
+ "%s/" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY "/%s",
+ session_get_base_path(session),
+ session->last_archived_chunk_name);
+ if (fmt_ret == -1) {
+ PERROR("Failed to format the path of the last archived trace chunk");
+ info_return->status = LTTNG_ROTATION_STATUS_ERROR;
+ cmd_ret = LTTNG_ERR_UNK;
+ goto end;
+ }
break;
case CONSUMER_DST_NET:
+ {
+ uint16_t ctrl_port, data_port;
+
current_tracing_path_reply =
info_return->location.relay.relative_path;
current_tracing_path_reply_len =
goto end;
}
- session_get_net_consumer_ports(session,
- &info_return->location.relay.ports.control,
- &info_return->location.relay.ports.data);
+ session_get_net_consumer_ports(session, &ctrl_port, &data_port);
+ info_return->location.relay.ports.control = ctrl_port;
+ info_return->location.relay.ports.data = data_port;
info_return->location_type =
(int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_RELAY;
+ chunk_path = strdup(session->last_chunk_path);
+ if (!chunk_path) {
+ ERR("Failed to allocate the path of the last archived trace chunk");
+ info_return->status = LTTNG_ROTATION_STATUS_ERROR;
+ cmd_ret = LTTNG_ERR_UNK;
+ goto end;
+ }
break;
+ }
default:
abort();
}
- fmt_ret = asprintf(&chunk_path,
- "%s/" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY "/%s",
- session_get_base_path(session),
- session->last_archived_chunk_name);
- if (fmt_ret == -1) {
- PERROR("Failed to format the path of the last archived trace chunk");
- info_return->status = LTTNG_ROTATION_STATUS_ERROR;
- cmd_ret = LTTNG_ERR_UNK;
- goto end;
- }
fmt_ret = lttng_strncpy(current_tracing_path_reply,
chunk_path, current_tracing_path_reply_len);
projects / lttng-tools.git / blobdiff