/*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
*
- * 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 "utils.h"
#include "trace-ust.h"
#include "timer.h"
+#include "cmd.h"
+
+struct ltt_session_destroy_notifier_element {
+ ltt_session_destroy_notifier notifier;
+ void *user_data;
+};
+
+struct ltt_session_clear_notifier_element {
+ ltt_session_clear_notifier notifier;
+ void *user_data;
+};
/*
* NOTES:
* The caller must hold the session lock.
*/
struct lttng_trace_archive_location *session_get_trace_archive_location(
- struct ltt_session *session)
+ const struct ltt_session *session)
{
int ret;
struct lttng_trace_archive_location *location = NULL;
goto end;
}
- ret = asprintf(&chunk_path, "%s/" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY "/%s",
- session_get_base_path(session),
- session->last_archived_chunk_name);
- if (ret == -1) {
- goto end;
- }
-
switch (session_get_consumer_destination_type(session)) {
case CONSUMER_DST_LOCAL:
+ ret = asprintf(&chunk_path,
+ "%s/" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY "/%s",
+ session_get_base_path(session),
+ session->last_archived_chunk_name);
+ if (ret == -1) {
+ goto end;
+ }
location = lttng_trace_archive_location_local_create(
chunk_path);
break;
location = lttng_trace_archive_location_relay_create(
hostname,
LTTNG_TRACE_ARCHIVE_LOCATION_RELAY_PROTOCOL_TYPE_TCP,
- control_port, data_port, chunk_path);
+ control_port, data_port, session->last_chunk_path);
break;
}
default:
*
* The session list lock must be held.
*/
-int ltt_sessions_ht_alloc(void)
+static int ltt_sessions_ht_alloc(void)
{
int ret = 0;
struct lttng_trace_chunk *new_trace_chunk,
struct lttng_trace_chunk **_current_trace_chunk)
{
- int ret;
+ int ret = 0;
unsigned int i, refs_to_acquire = 0, refs_acquired = 0, refs_to_release = 0;
struct cds_lfht_iter iter;
struct consumer_socket *socket;
struct lttng_trace_chunk *current_trace_chunk;
uint64_t chunk_id;
enum lttng_trace_chunk_status chunk_status;
- const uint64_t relayd_id = session->consumer->net_seq_index;
- const bool is_local_trace = relayd_id == -1ULL;
rcu_read_lock();
/*
}
if (session->ust_session) {
+ const uint64_t relayd_id =
+ session->ust_session->consumer->net_seq_index;
+ const bool is_local_trace =
+ session->ust_session->consumer->type ==
+ CONSUMER_DST_LOCAL;
+
session->ust_session->current_trace_chunk = new_trace_chunk;
- if (is_local_trace) {
+ if (is_local_trace) {
enum lttng_error_code ret_error_code;
ret_error_code = ust_app_create_channel_subdirectories(
session->ust_session);
if (ret_error_code != LTTNG_OK) {
- ret = -ret_error_code;
goto error;
}
- }
+ }
cds_lfht_for_each_entry(
session->ust_session->consumer->socks->ht,
&iter, socket, node.node) {
pthread_mutex_lock(socket->lock);
ret = consumer_create_trace_chunk(socket,
relayd_id,
- session->id, new_trace_chunk);
+ session->id, new_trace_chunk,
+ DEFAULT_UST_TRACE_DIR);
pthread_mutex_unlock(socket->lock);
- if (ret) {
+ if (ret) {
goto error;
- }
- }
- }
+ }
+ }
+ }
if (session->kernel_session) {
+ const uint64_t relayd_id =
+ session->kernel_session->consumer->net_seq_index;
+ const bool is_local_trace =
+ session->kernel_session->consumer->type ==
+ CONSUMER_DST_LOCAL;
+
session->kernel_session->current_trace_chunk = new_trace_chunk;
if (is_local_trace) {
enum lttng_error_code ret_error_code;
ret_error_code = kernel_create_channel_subdirectories(
session->kernel_session);
if (ret_error_code != LTTNG_OK) {
- ret = -ret_error_code;
goto error;
}
- }
+ }
cds_lfht_for_each_entry(
session->kernel_session->consumer->socks->ht,
&iter, socket, node.node) {
pthread_mutex_lock(socket->lock);
ret = consumer_create_trace_chunk(socket,
relayd_id,
- session->id, new_trace_chunk);
+ session->id, new_trace_chunk,
+ DEFAULT_KERNEL_TRACE_DIR);
pthread_mutex_unlock(socket->lock);
- if (ret) {
+ if (ret) {
goto error;
- }
- }
- }
+ }
+ }
+ }
/*
* Update local current trace chunk state last, only if all remote
if (session->kernel_session) {
session->kernel_session->current_trace_chunk = NULL;
}
- /*
+ /*
* Release references taken in the case where all references could not
* be acquired.
*/
goto end_no_move;
}
-static
-bool output_supports_trace_chunks(const struct ltt_session *session)
-{
- if (session->consumer->type == CONSUMER_DST_LOCAL) {
- return true;
- } else {
- struct consumer_output *output;
-
- if (session->ust_session) {
- output = session->ust_session->consumer;
- } else if (session->kernel_session) {
- output = session->kernel_session->consumer;
- } else {
- abort();
- }
-
- if (output->relay_major_version > 2) {
- return true;
- } else if (output->relay_major_version == 2 &&
- output->relay_minor_version >= 11) {
- return true;
- }
- }
- return false;
-}
-
struct lttng_trace_chunk *session_create_new_trace_chunk(
- struct ltt_session *session,
+ const struct ltt_session *session,
+ const struct consumer_output *consumer_output_override,
const char *session_base_path_override,
const char *chunk_name_override)
{
struct lttng_trace_chunk *trace_chunk = NULL;
enum lttng_trace_chunk_status chunk_status;
const time_t chunk_creation_ts = time(NULL);
- const bool is_local_trace =
- session->consumer->type == CONSUMER_DST_LOCAL;
- const char *base_path = session_base_path_override ? :
- session_get_base_path(session);
- struct lttng_directory_handle session_output_directory;
+ bool is_local_trace;
+ const char *base_path;
+ struct lttng_directory_handle *session_output_directory = NULL;
const struct lttng_credentials session_credentials = {
.uid = session->uid,
.gid = session->gid,
};
uint64_t next_chunk_id;
+ const struct consumer_output *output;
+ const char *new_path;
+
+ if (consumer_output_override) {
+ output = consumer_output_override;
+ } else {
+ assert(session->ust_session || session->kernel_session);
+ output = session->ust_session ?
+ session->ust_session->consumer :
+ session->kernel_session->consumer;
+ }
+
+ is_local_trace = output->type == CONSUMER_DST_LOCAL;
+ base_path = session_base_path_override ? :
+ consumer_output_get_base_path(output);
if (chunk_creation_ts == (time_t) -1) {
PERROR("Failed to sample time while creation session \"%s\" trace chunk",
goto error;
}
- if (!output_supports_trace_chunks(session)) {
- goto end;
- }
next_chunk_id = session->most_recent_chunk_id.is_set ?
session->most_recent_chunk_id.value + 1 : 0;
+ if (session->current_trace_chunk &&
+ !lttng_trace_chunk_get_name_overridden(session->current_trace_chunk)) {
+ chunk_status = lttng_trace_chunk_rename_path(session->current_trace_chunk,
+ DEFAULT_CHUNK_TMP_OLD_DIRECTORY);
+ if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ goto error;
+ }
+ }
+ if (!session->current_trace_chunk) {
+ if (!session->rotated) {
+ new_path = "";
+ } else {
+ new_path = NULL;
+ }
+ } else {
+ new_path = DEFAULT_CHUNK_TMP_NEW_DIRECTORY;
+ }
+
trace_chunk = lttng_trace_chunk_create(next_chunk_id,
- chunk_creation_ts);
+ chunk_creation_ts, new_path);
if (!trace_chunk) {
goto error;
}
if (ret) {
goto error;
}
- ret = lttng_directory_handle_init(&session_output_directory,
- base_path);
- if (ret) {
+ session_output_directory = lttng_directory_handle_create(base_path);
+ if (!session_output_directory) {
goto error;
}
chunk_status = lttng_trace_chunk_set_as_owner(trace_chunk,
- &session_output_directory);
- lttng_directory_handle_fini(&session_output_directory);
+ session_output_directory);
+ lttng_directory_handle_put(session_output_directory);
+ session_output_directory = NULL;
if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
goto error;
}
end:
return trace_chunk;
error:
+ lttng_directory_handle_put(session_output_directory);
lttng_trace_chunk_put(trace_chunk);
trace_chunk = NULL;
goto end;
}
-int session_close_trace_chunk(const struct ltt_session *session,
- struct lttng_trace_chunk *trace_chunk)
+int session_close_trace_chunk(struct ltt_session *session,
+ struct lttng_trace_chunk *trace_chunk,
+ enum lttng_trace_chunk_command_type close_command,
+ char *closed_trace_chunk_path)
{
int ret = 0;
bool error_occurred = false;
struct consumer_socket *socket;
enum lttng_trace_chunk_status chunk_status;
const time_t chunk_close_timestamp = time(NULL);
+ const char *new_path;
+
+ chunk_status = lttng_trace_chunk_set_close_command(
+ trace_chunk, close_command);
+ if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ret = -1;
+ goto end;
+ }
if (chunk_close_timestamp == (time_t) -1) {
ERR("Failed to sample the close timestamp of the current trace chunk of session \"%s\"",
ret = -1;
goto end;
}
+
+ if (close_command == LTTNG_TRACE_CHUNK_COMMAND_TYPE_DELETE && !session->rotated) {
+ /* New chunk stays in session output directory. */
+ new_path = "";
+ } else {
+ /* Use chunk name for new chunk. */
+ new_path = NULL;
+ }
+ if (session->current_trace_chunk &&
+ !lttng_trace_chunk_get_name_overridden(session->current_trace_chunk)) {
+ /* Rename new chunk path. */
+ chunk_status = lttng_trace_chunk_rename_path(session->current_trace_chunk,
+ new_path);
+ if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ret = -1;
+ goto end;
+ }
+ }
+ if (!lttng_trace_chunk_get_name_overridden(trace_chunk) &&
+ close_command == LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION) {
+ const char *old_path;
+
+ if (!session->rotated) {
+ old_path = "";
+ } else {
+ old_path = NULL;
+ }
+ /* We need to move back the .tmp_old_chunk to its rightful place. */
+ chunk_status = lttng_trace_chunk_rename_path(trace_chunk,
+ old_path);
+ if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ret = -1;
+ goto end;
+ }
+ }
+ if (close_command == LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED) {
+ session->rotated = true;
+ }
chunk_status = lttng_trace_chunk_set_close_timestamp(trace_chunk,
chunk_close_timestamp);
if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
}
if (session->ust_session) {
+ const uint64_t relayd_id =
+ session->ust_session->consumer->net_seq_index;
+
cds_lfht_for_each_entry(
session->ust_session->consumer->socks->ht,
&iter, socket, node.node) {
pthread_mutex_lock(socket->lock);
ret = consumer_close_trace_chunk(socket,
- session->consumer->net_seq_index,
+ relayd_id,
session->id,
- trace_chunk);
+ trace_chunk, closed_trace_chunk_path);
pthread_mutex_unlock(socket->lock);
if (ret) {
ERR("Failed to close trace chunk on user space consumer");
}
}
if (session->kernel_session) {
+ const uint64_t relayd_id =
+ session->kernel_session->consumer->net_seq_index;
+
cds_lfht_for_each_entry(
session->kernel_session->consumer->socks->ht,
&iter, socket, node.node) {
pthread_mutex_lock(socket->lock);
ret = consumer_close_trace_chunk(socket,
- session->consumer->net_seq_index,
+ relayd_id,
session->id,
- trace_chunk);
+ trace_chunk, closed_trace_chunk_path);
pthread_mutex_unlock(socket->lock);
if (ret) {
ERR("Failed to close trace chunk on kernel consumer");
return ret;
}
+/*
+ * This function skips the metadata channel as the begin/end timestamps of a
+ * metadata packet are useless.
+ *
+ * Moreover, opening a packet after a "clear" will cause problems for live
+ * sessions as it will introduce padding that was not part of the first trace
+ * chunk. The relay daemon expects the content of the metadata stream of
+ * successive metadata trace chunks to be strict supersets of one another.
+ *
+ * For example, flushing a packet at the beginning of the metadata stream of
+ * a trace chunk resulting from a "clear" session command will cause the
+ * size of the metadata stream of the new trace chunk to not match the size of
+ * the metadata stream of the original chunk. This will confuse the relay
+ * daemon as the same "offset" in a metadata stream will no longer point
+ * to the same content.
+ */
+static
+enum lttng_error_code session_kernel_open_packets(struct ltt_session *session)
+{
+ enum lttng_error_code ret = LTTNG_OK;
+ struct consumer_socket *socket;
+ struct lttng_ht_iter iter;
+ struct cds_lfht_node *node;
+ struct ltt_kernel_channel *chan;
+
+ rcu_read_lock();
+
+ cds_lfht_first(session->kernel_session->consumer->socks->ht, &iter.iter);
+ node = cds_lfht_iter_get_node(&iter.iter);
+ socket = container_of(node, typeof(*socket), node.node);
+
+ cds_list_for_each_entry(chan,
+ &session->kernel_session->channel_list.head, list) {
+ int open_ret;
+
+ DBG("Open packet of kernel channel: channel key = %" PRIu64
+ ", session name = %s, session_id = %" PRIu64,
+ chan->key, session->name, session->id);
+
+ open_ret = consumer_open_channel_packets(socket, chan->key);
+ if (open_ret < 0) {
+ /* General error (no known error expected). */
+ ret = LTTNG_ERR_UNK;
+ goto end;
+ }
+ }
+
+end:
+ rcu_read_unlock();
+ return ret;
+}
+
+enum lttng_error_code session_open_packets(struct ltt_session *session)
+{
+ enum lttng_error_code ret = LTTNG_OK;
+
+ DBG("Opening packets of session channels: session name = %s, session id = %" PRIu64,
+ session->name, session->id);
+
+ if (session->ust_session) {
+ ret = ust_app_open_packets(session);
+ if (ret != LTTNG_OK) {
+ goto end;
+ }
+ }
+
+ if (session->kernel_session) {
+ ret = session_kernel_open_packets(session);
+ if (ret != LTTNG_OK) {
+ goto end;
+ }
+ }
+
+end:
+ return ret;
+}
+
/*
* Set a session's current trace chunk.
*
current_trace_chunk);
}
+static
+void session_notify_destruction(const struct ltt_session *session)
+{
+ size_t i;
+ const size_t count = lttng_dynamic_array_get_count(
+ &session->destroy_notifiers);
+
+ for (i = 0; i < count; i++) {
+ const struct ltt_session_destroy_notifier_element *element =
+ lttng_dynamic_array_get_element(
+ &session->destroy_notifiers, i);
+
+ element->notifier(session, element->user_data);
+ }
+}
+
+/*
+ * Fire each clear notifier once, and remove them from the array.
+ */
+void session_notify_clear(struct ltt_session *session)
+{
+ size_t i;
+ const size_t count = lttng_dynamic_array_get_count(
+ &session->clear_notifiers);
+
+ for (i = 0; i < count; i++) {
+ const struct ltt_session_clear_notifier_element *element =
+ lttng_dynamic_array_get_element(
+ &session->clear_notifiers, i);
+
+ element->notifier(session, element->user_data);
+ }
+ lttng_dynamic_array_clear(&session->clear_notifiers);
+}
+
static
void session_release(struct urcu_ref *ref)
{
struct ltt_ust_session *usess;
struct ltt_kernel_session *ksess;
struct ltt_session *session = container_of(ref, typeof(*session), ref);
+ const bool session_published = session->published;
assert(!session->chunk_being_archived);
usess = session->ust_session;
ksess = session->kernel_session;
- if (session->current_trace_chunk) {
- ret = session_close_trace_chunk(session, session->current_trace_chunk);
- if (ret) {
- ERR("Failed to close the current trace chunk of session \"%s\" during its release",
- session->name);
- }
- ret = _session_set_trace_chunk_no_lock_check(session, NULL, NULL);
- if (ret) {
- ERR("Failed to release the current trace chunk of session \"%s\" during its release",
- session->name);
- }
- }
- /* Clean kernel session teardown */
+ /* Clean kernel session teardown, keeping data for destroy notifier. */
kernel_destroy_session(ksess);
- session->kernel_session = NULL;
- /* UST session teardown */
+ /* UST session teardown, keeping data for destroy notifier. */
if (usess) {
/* Close any relayd session */
consumer_output_send_destroy_relayd(usess->consumer);
ERR("Error in ust_app_destroy_trace_all");
}
- /* Clean up the rest. */
+ /* Clean up the rest, keeping destroy notifier data. */
trace_ust_destroy_session(usess);
- session->ust_session = NULL;
}
/*
DBG("Destroying session %s (id %" PRIu64 ")", session->name, session->id);
- consumer_output_put(session->consumer);
snapshot_destroy(&session->snapshot);
pthread_mutex_destroy(&session->lock);
- if (session->published) {
+ if (session_published) {
ASSERT_LOCKED(ltt_session_list.lock);
del_session_list(session);
del_session_ht(session);
- pthread_cond_broadcast(<t_session_list.removal_cond);
}
+ session_notify_destruction(session);
+
+ consumer_output_put(session->consumer);
+ kernel_free_session(ksess);
+ session->kernel_session = NULL;
+ if (usess) {
+ trace_ust_free_session(usess);
+ session->ust_session = NULL;
+ }
+ lttng_dynamic_array_reset(&session->destroy_notifiers);
+ lttng_dynamic_array_reset(&session->clear_notifiers);
free(session->last_archived_chunk_name);
+ free(session->base_path);
free(session);
+ if (session_published) {
+ /*
+ * Broadcast after free-ing to ensure the memory is
+ * reclaimed before the main thread exits.
+ */
+ pthread_cond_broadcast(<t_session_list.removal_cond);
+ }
}
/*
session_put(session);
}
+int session_add_destroy_notifier(struct ltt_session *session,
+ ltt_session_destroy_notifier notifier, void *user_data)
+{
+ const struct ltt_session_destroy_notifier_element element = {
+ .notifier = notifier,
+ .user_data = user_data
+ };
+
+ return lttng_dynamic_array_add_element(&session->destroy_notifiers,
+ &element);
+}
+
+int session_add_clear_notifier(struct ltt_session *session,
+ ltt_session_clear_notifier notifier, void *user_data)
+{
+ const struct ltt_session_clear_notifier_element element = {
+ .notifier = notifier,
+ .user_data = user_data
+ };
+
+ return lttng_dynamic_array_add_element(&session->clear_notifiers,
+ &element);
+}
+
/*
* Return a ltt_session structure ptr that matches name. If no session found,
* NULL is returned. This must be called with the session list lock held using
goto error;
}
+ lttng_dynamic_array_init(&new_session->destroy_notifiers,
+ sizeof(struct ltt_session_destroy_notifier_element),
+ NULL);
+ lttng_dynamic_array_init(&new_session->clear_notifiers,
+ sizeof(struct ltt_session_clear_notifier_element),
+ NULL);
urcu_ref_init(&new_session->ref);
pthread_mutex_init(&new_session->lock, NULL);
DEFAULT_SESSION_NAME, i,
datetime);
}
+ new_session->name_contains_creation_time = true;
if (ret == -1 || ret >= sizeof(new_session->name)) {
/*
* Null-terminate in case the name is used
*
* Be careful of the result passed to this function. For instance,
* on failure to launch a rotation, a client will expect the rotation
- * state to be set to "NO_ROTATION". If an error occured while the
+ * state to be set to "NO_ROTATION". If an error occurred while the
* rotation was "ONGOING", result should be set to "ERROR", which will
* allow a client to report it.
*
chunk_id);
lttng_trace_chunk_put(session->chunk_being_archived);
session->chunk_being_archived = NULL;
+ /*
+ * Fire the clear reply notifiers if we are completing a clear
+ * rotation.
+ */
+ session_notify_clear(session);
}
return ret;
}
projects / lttng-tools.git / blobdiff