/*
- * 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 <urcu/list.h>
#include <urcu/uatomic.h>
#include <sys/stat.h>
+#include <stdio.h>
#include <common/defaults.h>
#include <common/common.h>
#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/action/action.h>
#include <lttng/channel-internal.h>
#include <lttng/rotate-internal.h>
#include <lttng/location-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"
/* Sleep for 100ms between each check for the shm path's deletion. */
#define SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US 100000
+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,
}
}
-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 events");
- DBG3("Listing UST global %d events", nb_event);
-
- /* 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;
- }
-
- extended_at = ((uint8_t *) tmp) + nb_event * sizeof(struct lttng_event);
+ strncpy(event.name, uevent->attr.name, sizeof(event.name));
+ event.name[sizeof(event.name) - 1] = '\0';
- 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;
}
/*
* Add URI so the consumer output object. Set the correct path depending on the
* domain adding the default trace directory.
*/
-static int add_uri_to_consumer(struct consumer_output *consumer,
- struct lttng_uri *uri, enum lttng_domain_type domain,
- const char *session_name)
+static enum lttng_error_code add_uri_to_consumer(
+ const struct ltt_session *session,
+ struct consumer_output *consumer,
+ struct lttng_uri *uri, enum lttng_domain_type domain)
{
- int ret = LTTNG_OK;
- const char *default_trace_dir;
+ int ret;
+ enum lttng_error_code ret_code = LTTNG_OK;
assert(uri);
if (consumer == NULL) {
DBG("No consumer detected. Don't add URI. Stopping.");
- ret = LTTNG_ERR_NO_CONSUMER;
+ ret_code = LTTNG_ERR_NO_CONSUMER;
goto error;
}
switch (domain) {
case LTTNG_DOMAIN_KERNEL:
- default_trace_dir = DEFAULT_KERNEL_TRACE_DIR;
+ ret = lttng_strncpy(consumer->domain_subdir,
+ DEFAULT_KERNEL_TRACE_DIR,
+ sizeof(consumer->domain_subdir));
break;
case LTTNG_DOMAIN_UST:
- default_trace_dir = DEFAULT_UST_TRACE_DIR;
+ ret = lttng_strncpy(consumer->domain_subdir,
+ DEFAULT_UST_TRACE_DIR,
+ sizeof(consumer->domain_subdir));
break;
default:
/*
- * This case is possible is we try to add the URI to the global tracing
- * session consumer object which in this case there is no subdir.
+ * This case is possible is we try to add the URI to the global
+ * tracing session consumer object which in this case there is
+ * no subdir.
*/
- default_trace_dir = "";
+ memset(consumer->domain_subdir, 0,
+ sizeof(consumer->domain_subdir));
+ ret = 0;
+ }
+ if (ret) {
+ ERR("Failed to initialize consumer output domain subdirectory");
+ ret_code = LTTNG_ERR_FATAL;
+ goto error;
}
switch (uri->dtype) {
consumer->dst.net.control_isset) ||
(uri->stype == LTTNG_STREAM_DATA &&
consumer->dst.net.data_isset)) {
- ret = LTTNG_ERR_URL_EXIST;
+ ret_code = LTTNG_ERR_URL_EXIST;
goto error;
}
} else {
- memset(&consumer->dst.net, 0, sizeof(consumer->dst.net));
+ memset(&consumer->dst, 0, sizeof(consumer->dst));
}
- consumer->type = CONSUMER_DST_NET;
-
/* Set URI into consumer output object */
- ret = consumer_set_network_uri(consumer, uri);
+ ret = consumer_set_network_uri(session, consumer, uri);
if (ret < 0) {
- ret = -ret;
+ ret_code = -ret;
goto error;
} else if (ret == 1) {
/*
* URI was the same in the consumer so we do not append the subdir
* again so to not duplicate output dir.
*/
- ret = LTTNG_OK;
+ ret_code = LTTNG_OK;
goto error;
}
-
- if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) {
- ret = consumer_set_subdir(consumer, session_name);
- if (ret < 0) {
- ret = LTTNG_ERR_FATAL;
- goto error;
- }
- }
-
- if (uri->stype == LTTNG_STREAM_CONTROL) {
- /* On a new subdir, reappend the default trace dir. */
- strncat(consumer->subdir, default_trace_dir,
- sizeof(consumer->subdir) - strlen(consumer->subdir) - 1);
- DBG3("Append domain trace name to subdir %s", consumer->subdir);
- }
-
break;
case LTTNG_DST_PATH:
- DBG2("Setting trace directory path from URI to %s", uri->dst.path);
- memset(consumer->dst.session_root_path, 0,
+ if (*uri->dst.path != '/' || strstr(uri->dst.path, "../")) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto error;
+ }
+ DBG2("Setting trace directory path from URI to %s",
+ uri->dst.path);
+ memset(&consumer->dst, 0, sizeof(consumer->dst));
+
+ ret = lttng_strncpy(consumer->dst.session_root_path,
+ uri->dst.path,
sizeof(consumer->dst.session_root_path));
- /* Explicit length checks for strcpy and strcat. */
- if (strlen(uri->dst.path) + strlen(default_trace_dir)
- >= sizeof(consumer->dst.session_root_path)) {
- ret = LTTNG_ERR_FATAL;
+ if (ret) {
+ ret_code = LTTNG_ERR_FATAL;
goto error;
}
- strcpy(consumer->dst.session_root_path, uri->dst.path);
- /* Append default trace dir */
- strcat(consumer->dst.session_root_path, default_trace_dir);
- /* Flag consumer as local. */
consumer->type = CONSUMER_DST_LOCAL;
break;
}
- ret = LTTNG_OK;
-
+ ret_code = LTTNG_OK;
error:
- return ret;
+ return ret_code;
}
/*
/* 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 lttng_uri *relayd_uri,
struct consumer_output *consumer,
struct consumer_socket *consumer_sock,
- char *session_name, char *hostname, int session_live_timer)
+ const char *session_name, const char *hostname,
+ const char *base_path, int session_live_timer,
+ const uint64_t *current_chunk_id,
+ time_t session_creation_time,
+ bool session_name_contains_creation_time)
{
int ret;
struct lttcomm_relayd_sock *rsock = NULL;
/* Send relayd socket to consumer. */
ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer,
relayd_uri->stype, session_id,
- session_name, hostname, session_live_timer);
+ session_name, hostname, base_path,
+ session_live_timer, current_chunk_id,
+ session_creation_time, session_name_contains_creation_time);
if (ret < 0) {
status = LTTNG_ERR_ENABLE_CONSUMER_FAIL;
goto close_sock;
static enum lttng_error_code send_consumer_relayd_sockets(
enum lttng_domain_type domain,
unsigned int session_id, struct consumer_output *consumer,
- struct consumer_socket *sock, char *session_name,
- char *hostname, int session_live_timer)
+ struct consumer_socket *sock, const char *session_name,
+ const char *hostname, const char *base_path, int session_live_timer,
+ const uint64_t *current_chunk_id, time_t session_creation_time,
+ bool session_name_contains_creation_time)
{
enum lttng_error_code status = LTTNG_OK;
if (!sock->control_sock_sent) {
status = send_consumer_relayd_socket(session_id,
&consumer->dst.net.control, consumer, sock,
- session_name, hostname, session_live_timer);
+ session_name, hostname, base_path, session_live_timer,
+ current_chunk_id, session_creation_time,
+ session_name_contains_creation_time);
if (status != LTTNG_OK) {
goto error;
}
if (!sock->data_sock_sent) {
status = send_consumer_relayd_socket(session_id,
&consumer->dst.net.data, consumer, sock,
- session_name, hostname, session_live_timer);
+ session_name, hostname, base_path, session_live_timer,
+ current_chunk_id, session_creation_time,
+ session_name_contains_creation_time);
if (status != LTTNG_OK) {
goto error;
}
struct ltt_kernel_session *ksess;
struct consumer_socket *socket;
struct lttng_ht_iter iter;
+ LTTNG_OPTIONAL(uint64_t) current_chunk_id = {};
assert(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);
+
+ if (status == LTTNG_TRACE_CHUNK_STATUS_OK) {
+ current_chunk_id.is_set = true;
+ } else {
+ ERR("Failed to get current trace chunk id");
+ ret = LTTNG_ERR_UNK;
+ goto error;
+ }
+ }
if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET
&& usess->consumer->enabled) {
ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id,
usess->consumer, socket,
session->name, session->hostname,
- session->live_timer);
+ session->base_path,
+ session->live_timer,
+ current_chunk_id.is_set ? ¤t_chunk_id.value : NULL,
+ session->creation_time,
+ session->name_contains_creation_time);
pthread_mutex_unlock(socket->lock);
if (ret != LTTNG_OK) {
goto error;
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
ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id,
ksess->consumer, socket,
session->name, session->hostname,
- session->live_timer);
+ session->base_path,
+ session->live_timer,
+ current_chunk_id.is_set ? ¤t_chunk_id.value : NULL,
+ session->creation_time,
+ session->name_contains_creation_time);
pthread_mutex_unlock(socket->lock);
if (ret != LTTNG_OK) {
goto error;
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;
}
+int stop_kernel_session(struct ltt_kernel_session *ksess)
+{
+ struct ltt_kernel_channel *kchan;
+ bool error_occurred = false;
+ int ret;
+
+ if (!ksess || !ksess->active) {
+ return LTTNG_OK;
+ }
+ DBG("Stopping kernel tracing");
+
+ ret = kernel_stop_session(ksess);
+ if (ret < 0) {
+ ret = LTTNG_ERR_KERN_STOP_FAIL;
+ goto error;
+ }
+
+ kernel_wait_quiescent();
+
+ /* 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;
+ }
+ }
+
+ /* 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;
+ }
+ }
+
+ ksess->active = 0;
+ if (error_occurred) {
+ ret = LTTNG_ERR_UNK;
+ } else {
+ ret = LTTNG_OK;
+ }
+error:
+ return ret;
+}
+
/*
* Command LTTNG_DISABLE_CHANNEL processed by the client thread.
*/
goto error;
}
- kernel_wait_quiescent(kernel_tracer_fd);
+ kernel_wait_quiescent();
break;
}
case LTTNG_DOMAIN_UST:
}
/*
- * Command LTTNG_TRACK_PID processed by the client thread.
+ * Command LTTNG_ENABLE_CHANNEL processed by the client thread.
*
- * Called with session lock held.
+ * The wpipe arguments is used as a notifier for the kernel thread.
*/
-int cmd_track_pid(struct ltt_session *session, enum lttng_domain_type domain,
- int pid)
+int cmd_enable_channel(struct ltt_session *session,
+ 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;
- rcu_read_lock();
-
- switch (domain) {
- case LTTNG_DOMAIN_KERNEL:
- {
- struct ltt_kernel_session *ksess;
-
- ksess = session->kernel_session;
+ assert(session);
+ assert(_attr);
+ assert(domain);
- ret = kernel_track_pid(ksess, pid);
- if (ret != LTTNG_OK) {
- goto error;
- }
+ attr = *_attr;
+ len = lttng_strnlen(attr.name, sizeof(attr.name));
- kernel_wait_quiescent(kernel_tracer_fd);
- break;
+ /* Validate channel name */
+ if (attr.name[0] == '.' ||
+ memchr(attr.name, '/', len) != NULL) {
+ ret = LTTNG_ERR_INVALID_CHANNEL_NAME;
+ goto end;
}
- case LTTNG_DOMAIN_UST:
- {
- struct ltt_ust_session *usess;
- usess = session->ust_session;
+ DBG("Enabling channel %s for session %s", attr.name, session->name);
- ret = trace_ust_track_pid(usess, pid);
- if (ret != LTTNG_OK) {
- goto error;
- }
- break;
- }
- default:
- ret = LTTNG_ERR_UNKNOWN_DOMAIN;
+ rcu_read_lock();
+
+ /*
+ * Don't try to enable a channel if the session has been started at
+ * some point in time before. The tracer does not allow it.
+ */
+ if (session->has_been_started) {
+ ret = LTTNG_ERR_TRACE_ALREADY_STARTED;
goto error;
}
- ret = LTTNG_OK;
-
-error:
- rcu_read_unlock();
- return ret;
-}
-
-/*
- * Command LTTNG_UNTRACK_PID processed by the client thread.
- *
- * Called with session lock held.
- */
-int cmd_untrack_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;
-
- ret = kernel_untrack_pid(ksess, pid);
- if (ret != LTTNG_OK) {
- goto error;
- }
-
- kernel_wait_quiescent(kernel_tracer_fd);
- break;
- }
- case LTTNG_DOMAIN_UST:
- {
- struct ltt_ust_session *usess;
-
- usess = session->ust_session;
-
- ret = trace_ust_untrack_pid(usess, pid);
- if (ret != LTTNG_OK) {
- goto error;
- }
- break;
- }
- default:
- ret = LTTNG_ERR_UNKNOWN_DOMAIN;
- goto error;
- }
-
- ret = LTTNG_OK;
-
-error:
- rcu_read_unlock();
- return ret;
-}
-
-/*
- * Command LTTNG_ENABLE_CHANNEL processed by the client thread.
- *
- * 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)
-{
- int ret;
- struct ltt_ust_session *usess = session->ust_session;
- struct lttng_ht *chan_ht;
- size_t len;
-
- assert(session);
- assert(attr);
- assert(domain);
-
- len = lttng_strnlen(attr->name, sizeof(attr->name));
-
- /* Validate channel name */
- 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);
-
- rcu_read_lock();
-
- /*
- * Don't try to enable a channel if the session has been started at
- * some point in time before. The tracer does not allow it.
- */
- if (session->has_been_started) {
- ret = LTTNG_ERR_TRACE_ALREADY_STARTED;
- goto error;
- }
-
- /*
- * If the session is a live session, remove the switch timer, the
- * live timer does the same thing but sends also synchronisation
- * beacons for inactive streams.
- */
- if (session->live_timer > 0) {
- attr->attr.live_timer_interval = session->live_timer;
- attr->attr.switch_timer_interval = 0;
- }
+ /*
+ * If the session is a live session, remove the switch timer, the
+ * live timer does the same thing but sends also synchronisation
+ * beacons for inactive streams.
+ */
+ if (session->live_timer > 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) {
- ret = channel_kernel_create(session->kernel_session, attr, wpipe);
- if (attr->name[0] != '\0') {
+ if (session->snapshot.nb_output > 0 ||
+ session->snapshot_mode) {
+ /* Enforce mmap output for snapshot sessions. */
+ attr.attr.output = LTTNG_EVENT_MMAP;
+ }
+ 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) {
+ session->has_non_mmap_channel = true;
+ }
error:
rcu_read_unlock();
end:
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,
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;
* 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,
* 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,
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;
}
/*
- * Command LTTNG_LIST_TRACKER_PIDS processed by the client thread.
+ * Command LTTNG_START_TRACE processed by the client thread.
*
- * Called with session lock held.
+ * Called with session mutex held.
*/
-ssize_t cmd_list_tracker_pids(struct ltt_session *session,
- enum lttng_domain_type domain, int32_t **pids)
+int cmd_start_trace(struct ltt_session *session)
{
- int ret;
- ssize_t nr_pids = 0;
+ enum lttng_error_code ret;
+ 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;
- switch (domain) {
- case LTTNG_DOMAIN_KERNEL:
- {
- struct ltt_kernel_session *ksess;
+ assert(session);
- 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;
+ /* Ease our life a bit ;) */
+ ksession = session->kernel_session;
+ usess = session->ust_session;
- 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;
+ /* Is the session already started? */
+ if (session->active) {
+ ret = LTTNG_ERR_TRACE_ALREADY_STARTED;
+ /* Perform nothing */
+ goto end;
}
- 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;
-}
-
-static
-int domain_mkdir(const struct consumer_output *output,
- const struct ltt_session *session,
- uid_t uid, gid_t gid)
-{
- struct consumer_socket *socket;
- struct lttng_ht_iter iter;
- int ret;
- char *path = NULL;
-
- if (!output || !output->socks) {
- ERR("No consumer output found");
- ret = -1;
- goto end;
- }
-
- path = zmalloc(LTTNG_PATH_MAX * sizeof(char));
- if (!path) {
- ERR("Cannot allocate mkdir path");
- ret = -1;
- goto end;
- }
-
- ret = snprintf(path, LTTNG_PATH_MAX, "%s%s%s",
- session_get_base_path(session),
- output->chunk_path, output->subdir);
- if (ret < 0 || ret >= LTTNG_PATH_MAX) {
- ERR("Format path");
- ret = -1;
- goto end;
- }
-
- DBG("Domain mkdir %s for session %" PRIu64, path, session->id);
- rcu_read_lock();
- /*
- * We have to iterate to find a socket, but we only need to send the
- * rename command to one consumer, so we break after the first one.
- */
- cds_lfht_for_each_entry(output->socks->ht, &iter.iter, socket, node.node) {
- pthread_mutex_lock(socket->lock);
- ret = consumer_mkdir(socket, session->id, output, path, uid, gid);
- pthread_mutex_unlock(socket->lock);
- if (ret) {
- ERR("Consumer mkdir");
- ret = -1;
- goto end_unlock;
- }
- break;
- }
-
- ret = 0;
-
-end_unlock:
- rcu_read_unlock();
-end:
- free(path);
- return ret;
-}
-
-static
-int session_mkdir(const struct ltt_session *session)
-{
- int ret;
- struct consumer_output *output;
- uid_t uid;
- gid_t gid;
-
- /*
- * Unsupported feature in lttng-relayd before 2.11, not an error since it
- * is only needed for session rotation and the user will get an error
- * on rotate.
- */
- if (session->consumer->type == CONSUMER_DST_NET &&
- session->consumer->relay_major_version == 2 &&
- session->consumer->relay_minor_version < 11) {
- ret = 0;
- goto end;
- }
-
- if (session->kernel_session) {
- output = session->kernel_session->consumer;
- uid = session->kernel_session->uid;
- gid = session->kernel_session->gid;
- ret = domain_mkdir(output, session, uid, gid);
- if (ret) {
- ERR("Mkdir kernel");
- goto end;
- }
- }
-
- if (session->ust_session) {
- output = session->ust_session->consumer;
- uid = session->ust_session->uid;
- gid = session->ust_session->gid;
- ret = domain_mkdir(output, session, uid, gid);
- if (ret) {
- ERR("Mkdir UST");
- goto end;
- }
- }
-
- ret = 0;
-
-end:
- return ret;
-}
-
-/*
- * Command LTTNG_START_TRACE processed by the client thread.
- *
- * Called with session mutex held.
- */
-int cmd_start_trace(struct ltt_session *session)
-{
- int ret;
- unsigned long nb_chan = 0;
- struct ltt_kernel_session *ksession;
- struct ltt_ust_session *usess;
-
- assert(session);
-
- /* Ease our life a bit ;) */
- ksession = session->kernel_session;
- usess = session->ust_session;
-
- /* Is the session already started? */
- if (session->active) {
- ret = LTTNG_ERR_TRACE_ALREADY_STARTED;
+
+ 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;
}
- /*
- * Record the timestamp of the first time the session is started for
- * an eventual session rotation call.
- */
- if (!session->has_been_started) {
- session->current_chunk_start_ts = time(NULL);
- if (session->current_chunk_start_ts == (time_t) -1) {
- PERROR("Failed to retrieve the \"%s\" session's start time",
+ 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;
+
+ DBG("Creating initial trace chunk of session \"%s\"",
session->name);
- ret = LTTNG_ERR_FATAL;
- goto error;
- }
- if (!session->snapshot_mode && session->output_traces) {
- ret = session_mkdir(session);
- if (ret) {
- ERR("Failed to create the session directories");
+ 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 session that trace should start automatically */
if (usess) {
- /*
- * Even though the start trace might fail, flag this session active so
- * other application coming in are started by default.
- */
- usess->active = 1;
+ int int_ret = ust_app_start_trace_all(usess);
- ret = ust_app_start_trace_all(usess);
- if (ret < 0) {
+ if (int_ret < 0) {
ret = LTTNG_ERR_UST_START_FAIL;
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
session->rotated_after_last_stop = false;
if (session->rotate_timer_period) {
- ret = timer_session_rotation_schedule_timer_start(session,
- session->rotate_timer_period);
- if (ret < 0) {
+ int int_ret = timer_session_rotation_schedule_timer_start(
+ session, session->rotate_timer_period);
+
+ if (int_ret < 0) {
ERR("Failed to enable rotate timer");
ret = LTTNG_ERR_UNK;
goto error;
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;
}
- if (session->rotation_schedule_timer_enabled) {
- if (timer_session_rotation_schedule_timer_stop(
- session)) {
- ERR("Failed to stop the \"rotation schedule\" timer of session %s",
- session->name);
- }
+ ret = stop_kernel_session(ksession);
+ if (ret != LTTNG_OK) {
+ goto error;
}
- /*
- * A rotation is still ongoing. The check timer will continue to wait
- * for the rotation to complete. When the rotation finally completes,
- * a check will be performed to rename the "active" chunk to the
- * expected "timestamp_begin-timestamp_end" format.
- */
- if (session->current_archive_id > 0 &&
- session->rotation_state != LTTNG_ROTATION_STATE_ONGOING) {
- ret = rename_active_chunk(session);
- if (ret) {
- /*
- * This error should not prevent the user from stopping
- * the session. However, it will be reported at the end.
- */
- error_occurred = true;
+ if (usess && usess->active) {
+ ret = ust_app_stop_trace_all(usess);
+ if (ret < 0) {
+ ret = LTTNG_ERR_UST_STOP_FAIL;
+ goto error;
}
}
- /* Kernel tracer */
- if (ksession && ksession->active) {
- DBG("Stop kernel tracing");
+ DBG("Completed stop session \"%s\" (id %" PRIu64 ")", session->name,
+ session->id);
+ /* Flag inactive after a successful stop. */
+ session->active = 0;
+ ret = LTTNG_OK;
- ret = kernel_stop_session(ksession);
- if (ret < 0) {
- ret = LTTNG_ERR_KERN_STOP_FAIL;
- goto error;
- }
+error:
+ return ret;
+}
- kernel_wait_quiescent(kernel_tracer_fd);
+/*
+ * 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;
- /* 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");
- }
+ 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;
}
- /* 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");
- }
+ if (session->base_path != NULL) {
+ free(session->base_path);
+ session->base_path = NULL;
}
- ksession->active = 0;
- DBG("Kernel session stopped %s (id %" PRIu64 ")", session->name,
- session->id);
- }
-
- if (usess && usess->active) {
- /*
- * Even though the stop trace might fail, flag this session inactive so
- * other application coming in are not started by default.
- */
- usess->active = 0;
-
- ret = ust_app_stop_trace_all(usess);
- if (ret < 0) {
- ret = LTTNG_ERR_UST_STOP_FAIL;
+ /* 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);
}
-
- /* Flag inactive after a successful stop. */
- session->active = 0;
- ret = !error_occurred ? LTTNG_OK : LTTNG_ERR_UNK;
-
+ 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->consumer,
- &uris[i], 0, session->name);
+ ret = add_uri_to_consumer(session, session->consumer, &uris[i],
+ LTTNG_DOMAIN_NONE);
if (ret != LTTNG_OK) {
goto error;
}
/* Set UST session URIs */
if (session->ust_session) {
for (i = 0; i < nb_uri; i++) {
- ret = add_uri_to_consumer(
+ ret = add_uri_to_consumer(session,
session->ust_session->consumer,
- &uris[i], LTTNG_DOMAIN_UST,
- session->name);
+ &uris[i], LTTNG_DOMAIN_UST);
if (ret != LTTNG_OK) {
goto error;
}
/* Set kernel session URIs */
if (session->kernel_session) {
for (i = 0; i < nb_uri; i++) {
- ret = add_uri_to_consumer(
+ ret = add_uri_to_consumer(session,
session->kernel_session->consumer,
- &uris[i], LTTNG_DOMAIN_KERNEL,
- session->name);
+ &uris[i], LTTNG_DOMAIN_KERNEL);
if (ret != LTTNG_OK) {
goto error;
}
return ret;
}
-/*
- * Command LTTNG_CREATE_SESSION processed by the client thread.
- */
-int cmd_create_session_uri(char *name, struct lttng_uri *uris,
- size_t nb_uri, lttng_sock_cred *creds, unsigned int live_timer)
+static
+enum lttng_error_code set_session_output_from_descriptor(
+ struct ltt_session *session,
+ const struct lttng_session_descriptor *descriptor)
{
int ret;
- struct ltt_session *session = NULL;
-
- assert(name);
- assert(creds);
-
- /* Check if the session already exists. */
- session_lock_list();
- session = session_find_by_name(name);
- session_unlock_list();
- if (session != NULL) {
- ret = LTTNG_ERR_EXIST_SESS;
+ enum lttng_error_code ret_code = LTTNG_OK;
+ enum lttng_session_descriptor_type session_type =
+ lttng_session_descriptor_get_type(descriptor);
+ enum lttng_session_descriptor_output_type output_type =
+ lttng_session_descriptor_get_output_type(descriptor);
+ struct lttng_uri uris[2] = {};
+ size_t uri_count = 0;
+
+ switch (output_type) {
+ case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE:
+ goto end;
+ case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL:
+ lttng_session_descriptor_get_local_output_uri(descriptor,
+ &uris[0]);
+ uri_count = 1;
+ break;
+ case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK:
+ lttng_session_descriptor_get_network_output_uris(descriptor,
+ &uris[0], &uris[1]);
+ uri_count = 2;
+ break;
+ default:
+ ret_code = LTTNG_ERR_INVALID;
goto end;
}
- /* Create tracing session in the registry */
- ret = session_create(name, LTTNG_SOCK_GET_UID_CRED(creds),
- LTTNG_SOCK_GET_GID_CRED(creds));
- if (ret != LTTNG_OK) {
+ switch (session_type) {
+ case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT:
+ {
+ struct snapshot_output *new_output = NULL;
+
+ new_output = snapshot_output_alloc();
+ if (!new_output) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ ret = snapshot_output_init_with_uri(session,
+ DEFAULT_SNAPSHOT_MAX_SIZE,
+ NULL, uris, uri_count, session->consumer,
+ new_output, &session->snapshot);
+ if (ret < 0) {
+ ret_code = (ret == -ENOMEM) ?
+ LTTNG_ERR_NOMEM : LTTNG_ERR_INVALID;
+ snapshot_output_destroy(new_output);
+ goto end;
+ }
+ snapshot_add_output(&session->snapshot, new_output);
+ break;
+ }
+ case LTTNG_SESSION_DESCRIPTOR_TYPE_REGULAR:
+ case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE:
+ {
+ ret_code = cmd_set_consumer_uri(session, uri_count, uris);
+ break;
+ }
+ default:
+ ret_code = LTTNG_ERR_INVALID;
goto end;
}
+end:
+ return ret_code;
+}
+
+static
+enum lttng_error_code cmd_create_session_from_descriptor(
+ struct lttng_session_descriptor *descriptor,
+ const lttng_sock_cred *creds,
+ const char *home_path)
+{
+ int ret;
+ enum lttng_error_code ret_code;
+ const char *session_name;
+ struct ltt_session *new_session = NULL;
+ enum lttng_session_descriptor_status descriptor_status;
- /* Get the newly created session pointer back. */
session_lock_list();
- session = session_find_by_name(name);
- session_unlock_list();
- assert(session);
+ if (home_path) {
+ if (*home_path != '/') {
+ ERR("Home path provided by client is not absolute");
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+ }
- session->live_timer = live_timer;
- /* Create default consumer output for the session not yet created. */
- session->consumer = consumer_create_output(CONSUMER_DST_LOCAL);
- if (session->consumer == NULL) {
- ret = LTTNG_ERR_FATAL;
+ descriptor_status = lttng_session_descriptor_get_session_name(
+ descriptor, &session_name);
+ switch (descriptor_status) {
+ case LTTNG_SESSION_DESCRIPTOR_STATUS_OK:
+ break;
+ case LTTNG_SESSION_DESCRIPTOR_STATUS_UNSET:
+ session_name = NULL;
+ break;
+ default:
+ ret_code = LTTNG_ERR_INVALID;
goto end;
}
- if (uris) {
- ret = cmd_set_consumer_uri(session, nb_uri, uris);
- if (ret != LTTNG_OK) {
+ ret_code = session_create(session_name, creds->uid, creds->gid,
+ &new_session);
+ if (ret_code != LTTNG_OK) {
+ goto end;
+ }
+
+ if (!session_name) {
+ ret = lttng_session_descriptor_set_session_name(descriptor,
+ new_session->name);
+ if (ret) {
+ ret_code = LTTNG_ERR_SESSION_FAIL;
+ goto end;
+ }
+ }
+
+ if (!lttng_session_descriptor_is_output_destination_initialized(
+ descriptor)) {
+ /*
+ * Only include the session's creation time in the output
+ * destination if the name of the session itself was
+ * not auto-generated.
+ */
+ ret_code = lttng_session_descriptor_set_default_output(
+ descriptor,
+ session_name ? &new_session->creation_time : NULL,
+ home_path);
+ if (ret_code != LTTNG_OK) {
goto end;
}
- session->output_traces = 1;
} else {
- session->output_traces = 0;
- DBG2("Session %s created with no output", session->name);
+ new_session->has_user_specified_directory =
+ lttng_session_descriptor_has_output_directory(
+ descriptor);
}
- session->consumer->enabled = 1;
+ switch (lttng_session_descriptor_get_type(descriptor)) {
+ case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT:
+ new_session->snapshot_mode = 1;
+ break;
+ case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE:
+ new_session->live_timer =
+ lttng_session_descriptor_live_get_timer_interval(
+ descriptor);
+ break;
+ default:
+ break;
+ }
- ret = LTTNG_OK;
+ ret_code = set_session_output_from_descriptor(new_session, descriptor);
+ if (ret_code != LTTNG_OK) {
+ goto end;
+ }
+ new_session->consumer->enabled = 1;
+ ret_code = LTTNG_OK;
end:
- if (session) {
- session_lock_list();
- session_put(session);
- session_unlock_list();
+ /* Release reference provided by the session_create function. */
+ session_put(new_session);
+ if (ret_code != LTTNG_OK && new_session) {
+ /* Release the global reference on error. */
+ session_destroy(new_session);
}
- return ret;
+ session_unlock_list();
+ return ret_code;
}
-/*
- * Command LTTNG_CREATE_SESSION_SNAPSHOT processed by the client thread.
- */
-int cmd_create_session_snapshot(char *name, struct lttng_uri *uris,
- size_t nb_uri, lttng_sock_cred *creds)
+enum lttng_error_code cmd_create_session(struct command_ctx *cmd_ctx, int sock,
+ struct lttng_session_descriptor **return_descriptor)
{
int ret;
- struct ltt_session *session = NULL;
- struct snapshot_output *new_output = NULL;
+ size_t payload_size;
+ struct lttng_dynamic_buffer payload;
+ struct lttng_buffer_view home_dir_view;
+ struct lttng_buffer_view session_descriptor_view;
+ struct lttng_session_descriptor *session_descriptor = NULL;
+ enum lttng_error_code ret_code;
+
+ lttng_dynamic_buffer_init(&payload);
+ 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 >
+ LTTNG_SESSION_DESCRIPTOR_MAX_LEN) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto error;
+ }
- assert(name);
- assert(creds);
+ 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;
+ goto error;
+ }
- /*
- * 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, 0);
- if (ret != LTTNG_OK) {
- goto end;
+ ret = lttcomm_recv_unix_sock(sock, payload.data, payload.size);
+ if (ret <= 0) {
+ ERR("Reception of session descriptor failed, aborting.");
+ ret_code = LTTNG_ERR_SESSION_FAIL;
+ goto error;
}
- /* Get the newly created session pointer back. This should NEVER fail. */
- session_lock_list();
- session = session_find_by_name(name);
- session_unlock_list();
- assert(session);
+ home_dir_view = lttng_buffer_view_from_dynamic_buffer(
+ &payload,
+ 0,
+ 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);
- /* Flag session for snapshot mode. */
- session->snapshot_mode = 1;
+ ret = lttng_session_descriptor_create_from_buffer(
+ &session_descriptor_view, &session_descriptor);
+ if (ret < 0) {
+ ERR("Failed to create session descriptor from payload of \"create session\" command");
+ ret_code = LTTNG_ERR_INVALID;
+ goto error;
+ }
- /* Skip snapshot output creation if no URI is given. */
- if (nb_uri == 0) {
- /* Not an error. */
- goto end;
+ /*
+ * Sets the descriptor's auto-generated properties (name, output) if
+ * needed.
+ */
+ ret_code = cmd_create_session_from_descriptor(session_descriptor,
+ &cmd_ctx->creds,
+ home_dir_view.size ? home_dir_view.data : NULL);
+ if (ret_code != LTTNG_OK) {
+ goto error;
}
- new_output = snapshot_output_alloc();
- if (!new_output) {
- ret = LTTNG_ERR_NOMEM;
- goto error_snapshot_alloc;
+ ret_code = LTTNG_OK;
+ *return_descriptor = session_descriptor;
+ session_descriptor = NULL;
+error:
+ lttng_dynamic_buffer_reset(&payload);
+ lttng_session_descriptor_destroy(session_descriptor);
+ return ret_code;
+}
+
+static
+void cmd_destroy_session_reply(const struct ltt_session *session,
+ void *_reply_context)
+{
+ int ret;
+ ssize_t comm_ret;
+ const struct cmd_destroy_session_reply_context *reply_context =
+ _reply_context;
+ struct lttng_dynamic_buffer payload;
+ struct lttcomm_session_destroy_command_header cmd_header;
+ struct lttng_trace_archive_location *location = NULL;
+ struct lttcomm_lttng_msg llm = {
+ .cmd_type = LTTNG_DESTROY_SESSION,
+ .ret_code = reply_context->destruction_status,
+ .pid = UINT32_MAX,
+ .cmd_header_size =
+ sizeof(struct lttcomm_session_destroy_command_header),
+ .data_size = 0,
+ };
+ size_t payload_size_before_location;
+
+ lttng_dynamic_buffer_init(&payload);
+
+ ret = lttng_dynamic_buffer_append(&payload, &llm, sizeof(llm));
+ if (ret) {
+ ERR("Failed to append session destruction message");
+ goto error;
}
- ret = snapshot_output_init_with_uri(DEFAULT_SNAPSHOT_MAX_SIZE, NULL,
- uris, nb_uri, session->consumer, new_output, &session->snapshot);
- if (ret < 0) {
- if (ret == -ENOMEM) {
- ret = LTTNG_ERR_NOMEM;
- } else {
- ret = LTTNG_ERR_INVALID;
- }
- goto error_snapshot;
+ cmd_header.rotation_state =
+ (int32_t) (reply_context->implicit_rotation_on_destroy ?
+ session->rotation_state :
+ LTTNG_ROTATION_STATE_NO_ROTATION);
+ ret = lttng_dynamic_buffer_append(&payload, &cmd_header,
+ sizeof(cmd_header));
+ if (ret) {
+ ERR("Failed to append session destruction command header");
+ goto error;
}
- rcu_read_lock();
- snapshot_add_output(&session->snapshot, new_output);
- rcu_read_unlock();
+ if (!reply_context->implicit_rotation_on_destroy) {
+ DBG("No implicit rotation performed during the destruction of session \"%s\", sending reply",
+ session->name);
+ goto send_reply;
+ }
+ if (session->rotation_state != LTTNG_ROTATION_STATE_COMPLETED) {
+ DBG("Rotation state of session \"%s\" is not \"completed\", sending session destruction reply",
+ session->name);
+ goto send_reply;
+ }
- ret = LTTNG_OK;
- goto end;
+ location = session_get_trace_archive_location(session);
+ if (!location) {
+ ERR("Failed to get the location of the trace archive produced during the destruction of session \"%s\"",
+ session->name);
+ goto error;
+ }
-error_snapshot:
- snapshot_output_destroy(new_output);
-error_snapshot_alloc:
-end:
- if (session) {
- session_lock_list();
- session_put(session);
- session_unlock_list();
+ payload_size_before_location = payload.size;
+ comm_ret = lttng_trace_archive_location_serialize(location,
+ &payload);
+ if (comm_ret < 0) {
+ ERR("Failed to serialize the location of the trace archive produced during the destruction of session \"%s\"",
+ session->name);
+ goto error;
}
- return ret;
+ /* Update the message to indicate the location's length. */
+ ((struct lttcomm_lttng_msg *) payload.data)->data_size =
+ payload.size - payload_size_before_location;
+send_reply:
+ comm_ret = lttcomm_send_unix_sock(reply_context->reply_sock_fd,
+ payload.data, payload.size);
+ if (comm_ret != (ssize_t) payload.size) {
+ ERR("Failed to send result of the destruction of session \"%s\" to client",
+ session->name);
+ }
+error:
+ ret = close(reply_context->reply_sock_fd);
+ if (ret) {
+ PERROR("Failed to close client socket in deferred session destroy reply");
+ }
+ lttng_dynamic_buffer_reset(&payload);
+ free(_reply_context);
}
/*
* Called with session lock held.
*/
int cmd_destroy_session(struct ltt_session *session,
- struct notification_thread_handle *notification_thread_handle)
+ struct notification_thread_handle *notification_thread_handle,
+ 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) {
+ reply_context = zmalloc(sizeof(*reply_context));
+ if (!reply_context) {
+ ret = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+ reply_context->reply_sock_fd = *sock_fd;
+ }
/* Safety net */
assert(session);
- DBG("Begin destroy session %s (id %" PRIu64 ")", session->name, session->id);
-
- if (session->rotation_pending_check_timer_enabled) {
- if (timer_session_rotation_pending_check_stop(session)) {
- ERR("Failed to stop the \"rotation pending check\" timer of session %s",
- session->name);
+ DBG("Begin destroy session %s (id %" PRIu64 ")", session->name,
+ session->id);
+ if (session->active) {
+ DBG("Session \"%s\" is active, attempting to stop it before destroying it",
+ session->name);
+ ret = cmd_stop_trace(session);
+ if (ret != LTTNG_OK && ret != LTTNG_ERR_TRACE_ALREADY_STOPPED) {
+ /* 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;
}
- /*
- * The rename of the current chunk is performed at stop, but if we rotated
- * the session after the previous stop command, we need to rename the
- * new (and empty) chunk that was started in between.
- */
- if (session->rotated_after_last_stop) {
- rename_active_chunk(session);
+ 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,
+ 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) {
+ reply_context->implicit_rotation_on_destroy = true;
+ }
+ } 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
+ * to a 'null' trace chunk before it is destroyed.
+ *
+ * This is a "quiet" rotation meaning that no notification is
+ * emitted and no renaming of the current trace chunk takes
+ * place.
+ */
+ 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));
+ destruction_last_error = -ret;
+ }
}
if (session->shm_path[0]) {
* _at least_ up to the point when that reference is released.
*/
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);
+ if (ret) {
+ ret = LTTNG_ERR_FATAL;
+ goto end;
+ } else {
+ *sock_fd = -1;
+ }
+ }
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 */
* The session list lock MUST be acquired before calling this function. Use
* session_lock_list() and session_unlock_list().
*/
-void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid,
- gid_t gid)
+void cmd_list_lttng_sessions(struct lttng_session *sessions,
+ size_t session_count, uid_t uid, gid_t gid)
{
int ret;
unsigned int i = 0;
struct ltt_session *session;
struct ltt_session_list *list = session_get_list();
+ struct lttng_session_extended *extended =
+ (typeof(extended)) (&sessions[session_count]);
DBG("Getting all available session for UID %d GID %d",
uid, gid);
/*
* 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;
sessions[i].enabled = session->active;
sessions[i].snapshot_mode = session->snapshot_mode;
sessions[i].live_timer_interval = session->live_timer;
+ extended[i].creation_time.value = (uint64_t) session->creation_time;
+ extended[i].creation_time.is_set = 1;
i++;
session_put(session);
}
* 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;
goto error;
}
+ if (session->has_non_mmap_channel) {
+ ret = LTTNG_ERR_SNAPSHOT_UNSUPPORTED;
+ goto error;
+ }
+
/* Only one output is allowed until we have the "tee" feature. */
if (session->snapshot.nb_output == 1) {
ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST;
goto error;
}
- ret = snapshot_output_init(output->max_size, output->name,
+ ret = snapshot_output_init(session, output->max_size, output->name,
output->ctrl_url, output->data_url, session->consumer, new_output,
&session->snapshot);
if (ret < 0) {
* 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;
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;
-
- 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);
+ struct lttng_payload trigger_payload;
+ struct lttng_credentials cmd_creds = {
+ .uid = cmd_ctx->creds.uid,
+ .gid = cmd_ctx->creds.gid,
+ };
+
+ 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;
- goto end;
+ /* 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;
+ }
}
+ /* Set the trigger credential */
+ lttng_trigger_set_credentials(trigger, &cmd_creds);
+
+ /* Inform the notification thread */
ret = notification_thread_command_register_trigger(notification_thread,
trigger);
/* Ownership of trigger was transferred. */
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;
-
- 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);
+ struct lttng_payload trigger_payload;
+ struct lttng_credentials cmd_creds = {
+ .uid = cmd_ctx->creds.uid,
+ .gid = cmd_ctx->creds.gid,
+ };
+
+ 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;
- goto end;
+ /* 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;
+ }
}
+ lttng_trigger_set_credentials(trigger, &cmd_creds);
+
ret = notification_thread_command_unregister_trigger(notification_thread,
trigger);
end:
lttng_trigger_destroy(trigger);
- lttng_dynamic_buffer_reset(&trigger_buffer);
+ lttng_payload_reset(&trigger_payload);
return ret;
}
* Return LTTNG_OK on success or a LTTNG_ERR code.
*/
static enum lttng_error_code set_relayd_for_snapshot(
- struct consumer_output *consumer,
- struct snapshot_output *snap_output,
- struct ltt_session *session)
+ struct consumer_output *output,
+ const struct ltt_session *session)
{
enum lttng_error_code status = LTTNG_OK;
struct lttng_ht_iter iter;
struct consumer_socket *socket;
+ LTTNG_OPTIONAL(uint64_t) current_chunk_id = {};
+ const char *base_path;
- assert(consumer);
- assert(snap_output);
+ assert(output);
assert(session);
DBG2("Set relayd object from snapshot output");
+ if (session->current_trace_chunk) {
+ enum lttng_trace_chunk_status chunk_status =
+ lttng_trace_chunk_get_id(
+ session->current_trace_chunk,
+ ¤t_chunk_id.value);
+
+ if (chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK) {
+ current_chunk_id.is_set = true;
+ } else {
+ ERR("Failed to get current trace chunk id");
+ status = LTTNG_ERR_UNK;
+ goto error;
+ }
+ }
+
/* Ignore if snapshot consumer output is not network. */
- if (snap_output->consumer->type != CONSUMER_DST_NET) {
+ if (output->type != CONSUMER_DST_NET) {
goto error;
}
+ /*
+ * The snapshot record URI base path overrides the session
+ * base path.
+ */
+ if (output->dst.net.control.subdir[0] != '\0') {
+ base_path = output->dst.net.control.subdir;
+ } else {
+ base_path = session->base_path;
+ }
+
/*
* For each consumer socket, create and send the relayd object of the
* snapshot output.
*/
rcu_read_lock();
- cds_lfht_for_each_entry(snap_output->consumer->socks->ht, &iter.iter,
+ cds_lfht_for_each_entry(output->socks->ht, &iter.iter,
socket, node.node) {
pthread_mutex_lock(socket->lock);
status = send_consumer_relayd_sockets(0, session->id,
- snap_output->consumer, socket,
+ output, socket,
session->name, session->hostname,
- session->live_timer);
+ base_path,
+ session->live_timer,
+ current_chunk_id.is_set ? ¤t_chunk_id.value : NULL,
+ session->creation_time,
+ session->name_contains_creation_time);
pthread_mutex_unlock(socket->lock);
if (status != LTTNG_OK) {
rcu_read_unlock();
/*
* Record a kernel snapshot.
*
- * Return LTTNG_OK on success or a LTTNG_ERR code.
- */
-static enum lttng_error_code record_kernel_snapshot(struct ltt_kernel_session *ksess,
- struct snapshot_output *output, struct ltt_session *session,
- int wait, uint64_t nb_packets_per_stream)
-{
- int ret;
- enum lttng_error_code status;
-
- assert(ksess);
- assert(output);
- assert(session);
-
- /*
- * Copy kernel session sockets so we can communicate with the right
- * consumer for the snapshot record command.
- */
- ret = consumer_copy_sockets(output->consumer, ksess->consumer);
- if (ret < 0) {
- status = LTTNG_ERR_NOMEM;
- goto error;
- }
-
- status = set_relayd_for_snapshot(ksess->consumer, output, session);
- if (status != LTTNG_OK) {
- goto error_snapshot;
- }
-
- status = kernel_snapshot_record(ksess, output, wait, nb_packets_per_stream);
- if (status != LTTNG_OK) {
- goto error_snapshot;
- }
+ * Return LTTNG_OK on success or a LTTNG_ERR code.
+ */
+static enum lttng_error_code record_kernel_snapshot(
+ struct ltt_kernel_session *ksess,
+ const struct consumer_output *output,
+ const struct ltt_session *session,
+ int wait, uint64_t nb_packets_per_stream)
+{
+ enum lttng_error_code status;
- goto end;
+ assert(ksess);
+ assert(output);
+ assert(session);
-error_snapshot:
- /* Clean up copied sockets so this output can use some other later on. */
- consumer_destroy_output_sockets(output->consumer);
-error:
-end:
+ status = kernel_snapshot_record(
+ ksess, output, wait, nb_packets_per_stream);
return status;
}
* Returns LTTNG_OK on success or a LTTNG_ERR error code.
*/
static enum lttng_error_code record_ust_snapshot(struct ltt_ust_session *usess,
- struct snapshot_output *output, struct ltt_session *session,
+ const struct consumer_output *output,
+ const struct ltt_session *session,
int wait, uint64_t nb_packets_per_stream)
{
- int ret;
enum lttng_error_code status;
assert(usess);
assert(output);
assert(session);
- /*
- * Copy UST session sockets so we can communicate with the right
- * consumer for the snapshot record command.
- */
- ret = consumer_copy_sockets(output->consumer, usess->consumer);
- if (ret < 0) {
- status = LTTNG_ERR_NOMEM;
- goto error;
- }
-
- status = set_relayd_for_snapshot(usess->consumer, output, session);
- if (status != LTTNG_OK) {
- goto error_snapshot;
- }
-
- status = ust_app_snapshot_record(usess, output, wait, nb_packets_per_stream);
- if (status != LTTNG_OK) {
- goto error_snapshot;
- }
-
-error_snapshot:
- /* Clean up copied sockets so this output can use some other later on. */
- consumer_destroy_output_sockets(output->consumer);
-error:
+ status = ust_app_snapshot_record(
+ usess, output, wait, nb_packets_per_stream);
return status;
}
static
-uint64_t get_session_size_one_more_packet_per_stream(struct ltt_session *session,
- uint64_t cur_nr_packets)
+uint64_t get_session_size_one_more_packet_per_stream(
+ const struct ltt_session *session, uint64_t cur_nr_packets)
{
uint64_t tot_size = 0;
if (session->kernel_session) {
struct ltt_kernel_channel *chan;
- struct ltt_kernel_session *ksess = session->kernel_session;
+ const struct ltt_kernel_session *ksess =
+ session->kernel_session;
cds_list_for_each_entry(chan, &ksess->channel_list.head, list) {
if (cur_nr_packets >= chan->channel->attr.num_subbuf) {
}
if (session->ust_session) {
- struct ltt_ust_session *usess = session->ust_session;
+ const struct ltt_ust_session *usess = session->ust_session;
tot_size += ust_app_get_size_one_more_packet_per_stream(usess,
cur_nr_packets);
* in between this call and actually grabbing data.
*/
static
-int64_t get_session_nb_packets_per_stream(struct ltt_session *session, uint64_t max_size)
+int64_t get_session_nb_packets_per_stream(const struct ltt_session *session,
+ uint64_t max_size)
{
int64_t size_left;
uint64_t cur_nb_packets = 0;
for (;;) {
uint64_t one_more_packet_tot_size;
- one_more_packet_tot_size = get_session_size_one_more_packet_per_stream(session,
- cur_nb_packets);
+ one_more_packet_tot_size = get_session_size_one_more_packet_per_stream(
+ session, cur_nb_packets);
if (!one_more_packet_tot_size) {
/* We are already grabbing all packets. */
break;
}
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;
}
return cur_nb_packets;
}
+static
+enum lttng_error_code snapshot_record(struct ltt_session *session,
+ const struct snapshot_output *snapshot_output, int wait)
+{
+ int64_t nb_packets_per_stream;
+ char snapshot_chunk_name[LTTNG_NAME_MAX];
+ int ret;
+ enum lttng_error_code ret_code = LTTNG_OK;
+ struct lttng_trace_chunk *snapshot_trace_chunk;
+ struct consumer_output *original_ust_consumer_output = NULL;
+ struct consumer_output *original_kernel_consumer_output = NULL;
+ struct consumer_output *snapshot_ust_consumer_output = NULL;
+ struct consumer_output *snapshot_kernel_consumer_output = NULL;
+
+ ret = snprintf(snapshot_chunk_name, sizeof(snapshot_chunk_name),
+ "%s-%s-%" PRIu64,
+ snapshot_output->name,
+ snapshot_output->datetime,
+ snapshot_output->nb_snapshot);
+ if (ret < 0 || ret >= sizeof(snapshot_chunk_name)) {
+ ERR("Failed to format snapshot name");
+ ret_code = LTTNG_ERR_INVALID;
+ goto error;
+ }
+ DBG("Recording snapshot \"%s\" for session \"%s\" with chunk name \"%s\"",
+ snapshot_output->name, session->name,
+ snapshot_chunk_name);
+ if (!session->kernel_session && !session->ust_session) {
+ ERR("Failed to record snapshot as no channels exist");
+ ret_code = LTTNG_ERR_NO_CHANNEL;
+ goto error;
+ }
+
+ if (session->kernel_session) {
+ original_kernel_consumer_output =
+ 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) {
+ ERR("Failed to copy consumer sockets from snapshot output configuration");
+ ret_code = LTTNG_ERR_NOMEM;
+ goto error;
+ }
+ ret_code = set_relayd_for_snapshot(
+ snapshot_kernel_consumer_output, session);
+ if (ret_code != LTTNG_OK) {
+ ERR("Failed to setup relay daemon for kernel tracer snapshot");
+ goto error;
+ }
+ session->kernel_session->consumer =
+ snapshot_kernel_consumer_output;
+ }
+ if (session->ust_session) {
+ 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) {
+ ERR("Failed to copy consumer sockets from snapshot output configuration");
+ ret_code = LTTNG_ERR_NOMEM;
+ goto error;
+ }
+ ret_code = set_relayd_for_snapshot(
+ snapshot_ust_consumer_output, session);
+ if (ret_code != LTTNG_OK) {
+ ERR("Failed to setup relay daemon for userspace tracer snapshot");
+ goto error;
+ }
+ session->ust_session->consumer =
+ snapshot_ust_consumer_output;
+ }
+
+ snapshot_trace_chunk = session_create_new_trace_chunk(session,
+ snapshot_kernel_consumer_output ?:
+ snapshot_ust_consumer_output,
+ consumer_output_get_base_path(
+ snapshot_output->consumer),
+ snapshot_chunk_name);
+ if (!snapshot_trace_chunk) {
+ ERR("Failed to create temporary trace chunk to record a snapshot of session \"%s\"",
+ session->name);
+ ret_code = LTTNG_ERR_CREATE_DIR_FAIL;
+ goto error;
+ }
+ assert(!session->current_trace_chunk);
+ ret = session_set_trace_chunk(session, snapshot_trace_chunk, NULL);
+ lttng_trace_chunk_put(snapshot_trace_chunk);
+ snapshot_trace_chunk = NULL;
+ if (ret) {
+ ERR("Failed to set temporary trace chunk to record a snapshot of session \"%s\"",
+ session->name);
+ ret_code = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER;
+ goto error;
+ }
+
+ nb_packets_per_stream = get_session_nb_packets_per_stream(session,
+ snapshot_output->max_size);
+ if (nb_packets_per_stream < 0) {
+ ret_code = LTTNG_ERR_MAX_SIZE_INVALID;
+ goto error_close_trace_chunk;
+ }
+
+ if (session->kernel_session) {
+ ret_code = record_kernel_snapshot(session->kernel_session,
+ snapshot_kernel_consumer_output, session,
+ wait, nb_packets_per_stream);
+ if (ret_code != LTTNG_OK) {
+ goto error_close_trace_chunk;
+ }
+ }
+
+ if (session->ust_session) {
+ ret_code = record_ust_snapshot(session->ust_session,
+ snapshot_ust_consumer_output, session,
+ wait, nb_packets_per_stream);
+ if (ret_code != LTTNG_OK) {
+ goto error_close_trace_chunk;
+ }
+ }
+
+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.
+ */
+ ERR("Failed to close snapshot trace chunk of session \"%s\"",
+ session->name);
+ ret_code = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER;
+ }
+error:
+ if (original_ust_consumer_output) {
+ session->ust_session->consumer = original_ust_consumer_output;
+ }
+ if (original_kernel_consumer_output) {
+ session->kernel_session->consumer =
+ original_kernel_consumer_output;
+ }
+ consumer_output_put(snapshot_ust_consumer_output);
+ consumer_output_put(snapshot_kernel_consumer_output);
+ return ret_code;
+}
+
/*
* Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl.
*
* 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;
- unsigned int use_tmp_output = 0;
- struct snapshot_output tmp_output;
unsigned int snapshot_success = 0;
char datetime[16];
+ struct snapshot_output *tmp_output = NULL;
assert(session);
assert(output);
/* Use temporary output for the session. */
if (*output->ctrl_url != '\0') {
- ret = snapshot_output_init(output->max_size, output->name,
- output->ctrl_url, output->data_url, session->consumer,
- &tmp_output, NULL);
+ tmp_output = snapshot_output_alloc();
+ if (!tmp_output) {
+ cmd_ret = LTTNG_ERR_NOMEM;
+ goto error;
+ }
+
+ ret = snapshot_output_init(session, output->max_size,
+ output->name,
+ output->ctrl_url, output->data_url,
+ session->consumer,
+ tmp_output, NULL);
if (ret < 0) {
if (ret == -ENOMEM) {
cmd_ret = LTTNG_ERR_NOMEM;
goto error;
}
/* Use the global session count for the temporary snapshot. */
- tmp_output.nb_snapshot = session->snapshot.nb_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 (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) {
- cmd_ret = LTTNG_ERR_MAX_SIZE_INVALID;
+ memcpy(tmp_output->datetime, datetime, sizeof(datetime));
+ cmd_ret = snapshot_record(session, tmp_output, wait);
+ if (cmd_ret != LTTNG_OK) {
goto error;
}
-
- if (session->kernel_session) {
- cmd_ret = record_kernel_snapshot(session->kernel_session,
- &tmp_output, session,
- wait, nb_packets_per_stream);
- if (cmd_ret != LTTNG_OK) {
- goto error;
- }
- }
-
- if (session->ust_session) {
- cmd_ret = record_ust_snapshot(session->ust_session,
- &tmp_output, session,
- wait, nb_packets_per_stream);
- if (cmd_ret != LTTNG_OK) {
- goto error;
- }
- }
-
snapshot_success = 1;
} else {
struct snapshot_output *sout;
rcu_read_lock();
cds_lfht_for_each_entry(session->snapshot.output_ht->ht,
&iter.iter, sout, node.node) {
- int64_t nb_packets_per_stream;
+ struct snapshot_output output_copy;
/*
- * Make a local copy of the output and assign the possible
- * temporary value given by the caller.
+ * Make a local copy of the output and override output
+ * parameters with those provided as part of the
+ * command.
*/
- memset(&tmp_output, 0, sizeof(tmp_output));
- memcpy(&tmp_output, sout, sizeof(tmp_output));
+ memcpy(&output_copy, sout, sizeof(output_copy));
if (output->max_size != (uint64_t) -1ULL) {
- tmp_output.max_size = output->max_size;
+ output_copy.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) {
- cmd_ret = LTTNG_ERR_MAX_SIZE_INVALID;
- rcu_read_unlock();
- goto error;
- }
+ output_copy.nb_snapshot = session->snapshot.nb_snapshot;
+ memcpy(output_copy.datetime, datetime,
+ sizeof(datetime));
/* Use temporary name. */
if (*output->name != '\0') {
- if (lttng_strncpy(tmp_output.name, output->name,
- sizeof(tmp_output.name))) {
+ if (lttng_strncpy(output_copy.name,
+ output->name,
+ sizeof(output_copy.name))) {
cmd_ret = LTTNG_ERR_INVALID;
rcu_read_unlock();
goto error;
}
}
- tmp_output.nb_snapshot = session->snapshot.nb_snapshot;
- memcpy(tmp_output.datetime, datetime, sizeof(datetime));
-
- if (session->kernel_session) {
- cmd_ret = record_kernel_snapshot(session->kernel_session,
- &tmp_output, session,
- wait, nb_packets_per_stream);
- if (cmd_ret != LTTNG_OK) {
- rcu_read_unlock();
- goto error;
- }
- }
-
- if (session->ust_session) {
- cmd_ret = record_ust_snapshot(session->ust_session,
- &tmp_output, session,
- wait, nb_packets_per_stream);
- if (cmd_ret != LTTNG_OK) {
- rcu_read_unlock();
- goto error;
- }
+ cmd_ret = snapshot_record(session, &output_copy, wait);
+ if (cmd_ret != LTTNG_OK) {
+ rcu_read_unlock();
+ goto error;
}
snapshot_success = 1;
}
}
error:
+ if (tmp_output) {
+ snapshot_output_destroy(tmp_output);
+ }
return cmd_ret;
}
* Returns LTTNG_OK on success or else a negative LTTng error code.
*/
int cmd_rotate_session(struct ltt_session *session,
- struct lttng_rotate_session_return *rotate_return)
+ struct lttng_rotate_session_return *rotate_return,
+ bool quiet_rotation,
+ enum lttng_trace_chunk_command_type command)
{
int ret;
+ uint64_t ongoing_rotation_chunk_id;
enum lttng_error_code cmd_ret = LTTNG_OK;
- size_t strf_ret;
- struct tm *timeinfo;
- char datetime[21];
- time_t now;
- /*
- * Used to roll-back timestamps in case of failure to launch the
- * rotation.
- */
- time_t original_last_chunk_start_ts, original_current_chunk_start_ts;
+ 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);
goto end;
}
- if (session->live_timer || session->snapshot_mode ||
+ /*
+ * Explicit rotation is not supported for live sessions.
+ * However, live sessions can perform a quiet rotation on
+ * destroy.
+ * Rotation is not supported for snapshot traces (no output).
+ */
+ if ((!quiet_rotation && session->live_timer) ||
!session->output_traces) {
cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE;
goto end;
}
- /*
- * Unsupported feature in lttng-relayd before 2.11.
- */
- if (session->consumer->type == CONSUMER_DST_NET &&
+ /* Unsupported feature in lttng-relayd before 2.11. */
+ 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;
}
- /* Special case for the first rotation. */
- if (session->current_archive_id == 0) {
- const char *base_path = NULL;
-
- assert(session->kernel_session || session->ust_session);
- /* Either one of the two sessions is enough to get the root path. */
- base_path = session_get_base_path(session);
- assert(base_path);
-
- ret = lttng_strncpy(session->rotation_chunk.current_rotate_path,
- base_path,
- sizeof(session->rotation_chunk.current_rotate_path));
- if (ret) {
- ERR("Failed to copy session base path to current rotation chunk path");
- cmd_ret = LTTNG_ERR_UNK;
- goto end;
- }
- } else {
- /*
- * The currently active tracing path is now the folder we
- * want to rotate.
- */
- ret = lttng_strncpy(session->rotation_chunk.current_rotate_path,
- session->rotation_chunk.active_tracing_path,
- sizeof(session->rotation_chunk.current_rotate_path));
- if (ret) {
- ERR("Failed to copy the active tracing path to the current rotate path");
- cmd_ret = LTTNG_ERR_UNK;
- goto end;
- }
- }
- DBG("Current rotate path %s", session->rotation_chunk.current_rotate_path);
-
/*
- * Channels created after this point will belong to the next
- * archive id.
+ * After a stop followed by a clear, disallow following rotations a they would
+ * generate empty chunks.
*/
- session->current_archive_id++;
-
- now = time(NULL);
- if (now == (time_t) -1) {
- cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE;
+ 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;
}
- /* Sample chunk bounds for roll-back in case of error. */
- original_last_chunk_start_ts = session->last_chunk_start_ts;
- original_current_chunk_start_ts = session->current_chunk_start_ts;
-
- session->last_chunk_start_ts = session->current_chunk_start_ts;
- session->current_chunk_start_ts = now;
-
- timeinfo = localtime(&now);
- if (!timeinfo) {
- PERROR("Failed to sample local time in rotate session command");
- cmd_ret = LTTNG_ERR_UNK;
- goto end;
- }
- strf_ret = strftime(datetime, sizeof(datetime), "%Y%m%dT%H%M%S%z",
- timeinfo);
- if (!strf_ret) {
- ERR("Failed to format local time timestamp in rotate session command");
- cmd_ret = LTTNG_ERR_UNK;
- goto end;
+ if (session->active) {
+ new_trace_chunk = session_create_new_trace_chunk(session, NULL,
+ NULL, NULL);
+ if (!new_trace_chunk) {
+ cmd_ret = LTTNG_ERR_CREATE_DIR_FAIL;
+ goto error;
+ }
}
/*
- * A rotation has a local step even if the destination is a relay
- * daemon; the buffers must be consumed by the consumer daemon.
+ * 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.
*/
- session->rotation_pending_local = true;
- session->rotation_pending_relay =
- session_get_consumer_destination_type(session) == CONSUMER_DST_NET;
- session->rotation_state = LTTNG_ROTATION_STATE_ONGOING;
+ ret = session_set_trace_chunk(session, new_trace_chunk,
+ &chunk_being_archived);
+ if (ret) {
+ cmd_ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER;
+ goto error;
+ }
if (session->kernel_session) {
- /*
- * The active path for the next rotation/destroy.
- * Ex: ~/lttng-traces/auto-20170922-111748/20170922-111754-42
- */
- ret = snprintf(session->rotation_chunk.active_tracing_path,
- sizeof(session->rotation_chunk.active_tracing_path),
- "%s/%s-%" PRIu64,
- session_get_base_path(session),
- datetime, session->current_archive_id + 1);
- if (ret < 0 || ret == sizeof(session->rotation_chunk.active_tracing_path)) {
- ERR("Failed to format active kernel tracing path in rotate session command");
- cmd_ret = LTTNG_ERR_UNK;
- goto error;
- }
- /*
- * The sub-directory for the consumer
- * Ex: /20170922-111754-42/kernel
- */
- ret = snprintf(session->kernel_session->consumer->chunk_path,
- sizeof(session->kernel_session->consumer->chunk_path),
- "/%s-%" PRIu64, datetime,
- session->current_archive_id + 1);
- if (ret < 0 || ret == sizeof(session->kernel_session->consumer->chunk_path)) {
- ERR("Failed to format the kernel consumer's sub-directory in rotate session command");
- cmd_ret = LTTNG_ERR_UNK;
- goto error;
- }
- /*
- * Create the new chunk folder, before the rotation begins so we don't
- * race with the consumer/tracer activity.
- */
- ret = domain_mkdir(session->kernel_session->consumer, session,
- session->kernel_session->uid,
- session->kernel_session->gid);
- if (ret) {
- ERR("Failed to create kernel session tracing path at %s",
- session->kernel_session->consumer->chunk_path);
- cmd_ret = LTTNG_ERR_CREATE_DIR_FAIL;
- goto error;
- }
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) {
- ret = snprintf(session->rotation_chunk.active_tracing_path,
- PATH_MAX, "%s/%s-%" PRIu64,
- session_get_base_path(session),
- datetime, session->current_archive_id + 1);
- if (ret < 0) {
- ERR("Failed to format active UST tracing path in rotate session command");
- cmd_ret = LTTNG_ERR_UNK;
- goto error;
- }
- ret = snprintf(session->ust_session->consumer->chunk_path,
- PATH_MAX, "/%s-%" PRIu64, datetime,
- session->current_archive_id + 1);
- if (ret < 0) {
- ERR("Failed to format the UST consumer's sub-directory in rotate session command");
- cmd_ret = LTTNG_ERR_UNK;
- goto error;
- }
- /*
- * Create the new chunk folder, before the rotation begins so we don't
- * race with the consumer/tracer activity.
- */
- ret = domain_mkdir(session->ust_session->consumer, session,
- session->ust_session->uid,
- session->ust_session->gid);
- if (ret) {
- cmd_ret = LTTNG_ERR_CREATE_DIR_FAIL;
- goto error;
- }
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,
+ 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);
if (ret) {
goto error;
}
- if (!session->active) {
- session->rotated_after_last_stop = true;
- }
-
if (rotate_return) {
- rotate_return->rotation_id = session->current_archive_id;
+ rotate_return->rotation_id = ongoing_rotation_chunk_id;
}
- ret = notification_thread_command_session_rotation_ongoing(
- notification_thread_handle,
- session->name, session->uid, session->gid,
- session->current_archive_id - 1);
- if (ret != LTTNG_OK) {
- ERR("Failed to notify notification thread that a session rotation is ongoing for session %s",
- session->name);
- cmd_ret = ret;
+ session->chunk_being_archived = chunk_being_archived;
+ chunk_being_archived = NULL;
+ if (!quiet_rotation) {
+ ret = notification_thread_command_session_rotation_ongoing(
+ notification_thread_handle,
+ session->name, session->uid, session->gid,
+ ongoing_rotation_chunk_id);
+ if (ret != LTTNG_OK) {
+ ERR("Failed to notify notification thread that a session rotation is ongoing for session %s",
+ session->name);
+ cmd_ret = ret;
+ }
}
DBG("Cmd rotate session %s, archive_id %" PRIu64 " sent",
- session->name, session->current_archive_id - 1);
+ session->name, ongoing_rotation_chunk_id);
end:
+ lttng_trace_chunk_put(new_trace_chunk);
+ lttng_trace_chunk_put(chunk_being_archived);
ret = (cmd_ret == LTTNG_OK) ? cmd_ret : -((int) cmd_ret);
return ret;
error:
- session->last_chunk_start_ts = original_last_chunk_start_ts;
- session->current_archive_id = original_current_chunk_start_ts;
if (session_reset_rotation_state(session,
- LTTNG_ROTATION_STATE_NO_ROTATION)) {
+ LTTNG_ROTATION_STATE_ERROR)) {
ERR("Failed to reset rotation state of session \"%s\"",
session->name);
}
*
* Check if the session has finished its rotation.
*
- * Return 0 on success or else a LTTNG_ERR code.
+ * Return LTTNG_OK on success or else an LTTNG_ERR code.
*/
int cmd_rotate_get_info(struct ltt_session *session,
struct lttng_rotation_get_info_return *info_return,
uint64_t rotation_id)
{
- int ret;
-
- assert(session);
+ enum lttng_error_code cmd_ret = LTTNG_OK;
+ enum lttng_rotation_state rotation_state;
DBG("Cmd rotate_get_info session %s, rotation id %" PRIu64, session->name,
- session->current_archive_id);
+ session->most_recent_chunk_id.value);
- if (session->current_archive_id != rotation_id) {
- info_return->status = (int32_t) LTTNG_ROTATION_STATE_EXPIRED;
- ret = LTTNG_OK;
- goto end;
+ if (session->chunk_being_archived) {
+ enum lttng_trace_chunk_status chunk_status;
+ uint64_t chunk_id;
+
+ chunk_status = lttng_trace_chunk_get_id(
+ session->chunk_being_archived,
+ &chunk_id);
+ assert(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK);
+
+ rotation_state = rotation_id == chunk_id ?
+ LTTNG_ROTATION_STATE_ONGOING :
+ LTTNG_ROTATION_STATE_EXPIRED;
+ } else {
+ if (session->last_archived_chunk_id.is_set &&
+ rotation_id != session->last_archived_chunk_id.value) {
+ rotation_state = LTTNG_ROTATION_STATE_EXPIRED;
+ } else {
+ rotation_state = session->rotation_state;
+ }
}
- switch (session->rotation_state) {
+ switch (rotation_state) {
+ case LTTNG_ROTATION_STATE_NO_ROTATION:
+ DBG("Reporting that no rotation has occurred within the lifetime of session \"%s\"",
+ session->name);
+ goto end;
+ case LTTNG_ROTATION_STATE_EXPIRED:
+ DBG("Reporting that the rotation state of rotation id %" PRIu64 " of session \"%s\" has expired",
+ rotation_id, session->name);
+ break;
case LTTNG_ROTATION_STATE_ONGOING:
- DBG("Reporting that rotation id %" PRIu64 " of session %s is still pending",
+ DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is still pending",
rotation_id, session->name);
break;
case LTTNG_ROTATION_STATE_COMPLETED:
{
+ int fmt_ret;
+ char *chunk_path;
char *current_tracing_path_reply;
size_t current_tracing_path_reply_len;
+ DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is completed",
+ rotation_id, session->name);
+
switch (session_get_consumer_destination_type(session)) {
case CONSUMER_DST_LOCAL:
current_tracing_path_reply =
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 =
info_return->location.relay.protocol =
(int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_RELAY_PROTOCOL_TYPE_TCP;
- ret = lttng_strncpy(info_return->location.relay.host,
+ fmt_ret = lttng_strncpy(info_return->location.relay.host,
session_get_net_consumer_hostname(session),
sizeof(info_return->location.relay.host));
- if (ret) {
- ERR("Failed to host name to rotate_get_info reply");
+ if (fmt_ret) {
+ ERR("Failed to copy host name to rotate_get_info reply");
info_return->status = LTTNG_ROTATION_STATUS_ERROR;
- ret = -LTTNG_ERR_UNK;
+ cmd_ret = LTTNG_ERR_SET_URL;
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();
}
- ret = lttng_strncpy(current_tracing_path_reply,
- session->rotation_chunk.current_rotate_path,
- current_tracing_path_reply_len);
- if (ret) {
- ERR("Failed to copy current tracing path to rotate_get_info reply");
+
+ fmt_ret = lttng_strncpy(current_tracing_path_reply,
+ chunk_path, current_tracing_path_reply_len);
+ free(chunk_path);
+ if (fmt_ret) {
+ ERR("Failed to copy path of the last archived trace chunk to rotate_get_info reply");
info_return->status = LTTNG_ROTATION_STATUS_ERROR;
- ret = -LTTNG_ERR_UNK;
+ cmd_ret = LTTNG_ERR_UNK;
goto end;
}
break;
}
case LTTNG_ROTATION_STATE_ERROR:
- DBG("Reporting that an error occurred during rotation %" PRIu64 " of session %s",
+ DBG("Reporting that an error occurred during rotation %" PRIu64 " of session \"%s\"",
rotation_id, session->name);
break;
default:
abort();
}
- info_return->status = (int32_t) session->rotation_state;
- ret = LTTNG_OK;
+ cmd_ret = LTTNG_OK;
end:
- return ret;
+ info_return->status = (int32_t) rotation_state;
+ return cmd_ret;
}
/*
DBG("Cmd rotate set schedule session %s", session->name);
- if (session->live_timer || session->snapshot_mode ||
- !session->output_traces) {
+ if (session->live_timer || !session->output_traces) {
DBG("Failing ROTATION_SET_SCHEDULE command as the rotation feature is not available for this session");
ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE;
goto end;
projects / lttng-tools.git / blobdiff