#include <common/common.h>
#include <common/sessiond-comm/sessiond-comm.h>
#include <common/relayd/relayd.h>
+#include <common/utils.h>
#include "channel.h"
#include "consumer.h"
return ret;
}
+/*
+ * 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)
+{
+ int ret;
+ struct ltt_session *session;
+ struct snapshot_output *new_output = NULL;
+
+ assert(name);
+ assert(creds);
+
+ /*
+ * 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);
+ if (ret != LTTNG_OK) {
+ goto error;
+ }
+
+ /* Get the newly created session pointer back. This should NEVER fail. */
+ session = session_find_by_name(name);
+ assert(session);
+
+ /* Flag session for snapshot mode. */
+ session->snapshot_mode = 1;
+
+ /* Skip snapshot output creation if no URI is given. */
+ if (nb_uri == 0) {
+ goto end;
+ }
+
+ new_output = snapshot_output_alloc();
+ if (!new_output) {
+ ret = LTTNG_ERR_NOMEM;
+ goto error_snapshot_alloc;
+ }
+
+ 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;
+ }
+
+ rcu_read_lock();
+ snapshot_add_output(&session->snapshot, new_output);
+ rcu_read_unlock();
+
+end:
+ return LTTNG_OK;
+
+error_snapshot:
+ snapshot_output_destroy(new_output);
+error_snapshot_alloc:
+ session_destroy(session);
+error:
+ return ret;
+}
+
/*
* Command LTTNG_DESTROY_SESSION processed by the client thread.
*/
goto free_error;
}
- /*
- * Copy sockets so the snapshot output can use them on destroy.
- */
-
- if (session->ust_session) {
- ret = consumer_copy_sockets(new_output->consumer,
- session->ust_session->consumer);
- if (ret < 0) {
- goto free_error;
- }
- new_output->ust_sockets_copied = 1;
- }
- if (session->kernel_session) {
- ret = consumer_copy_sockets(new_output->consumer,
- session->kernel_session->consumer);
- if (ret < 0) {
- goto free_error;
- }
- new_output->kernel_sockets_copied = 1;
- }
-
rcu_read_lock();
snapshot_add_output(&session->snapshot, new_output);
if (id) {
* snapshot output.
*/
rcu_read_lock();
- cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket,
- node.node) {
+ cds_lfht_for_each_entry(snap_output->consumer->socks->ht, &iter.iter,
+ socket, node.node) {
ret = send_consumer_relayd_sockets(0, session->id,
snap_output->consumer, socket);
if (ret < 0) {
* Return 0 on success or else a negative value.
*/
static int record_kernel_snapshot(struct ltt_kernel_session *ksess,
- struct snapshot_output *output, struct ltt_session *session, int wait)
+ struct snapshot_output *output, struct ltt_session *session,
+ int wait, int nb_streams)
{
int ret;
assert(output);
assert(session);
- if (!output->kernel_sockets_copied) {
- ret = consumer_copy_sockets(output->consumer, ksess->consumer);
- if (ret < 0) {
- goto error;
- }
- output->kernel_sockets_copied = 1;
+ /* Get the datetime for the snapshot output directory. */
+ ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime,
+ sizeof(output->datetime));
+ if (!ret) {
+ ret = -EINVAL;
+ goto error;
}
- ret = set_relayd_for_snapshot(ksess->consumer, output, 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) {
goto error;
}
- ret = kernel_snapshot_record(ksess, output, wait);
+ ret = set_relayd_for_snapshot(ksess->consumer, output, session);
if (ret < 0) {
- goto error;
+ goto error_snapshot;
+ }
+
+ ret = kernel_snapshot_record(ksess, output, wait, nb_streams);
+ if (ret < 0) {
+ ret = -LTTNG_ERR_SNAPSHOT_FAIL;
+ if (ret == -EINVAL) {
+ ret = -LTTNG_ERR_INVALID;
+ }
+ 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:
return ret;
}
* Return 0 on success or else a negative value.
*/
static int record_ust_snapshot(struct ltt_ust_session *usess,
- struct snapshot_output *output, struct ltt_session *session, int wait)
+ struct snapshot_output *output, struct ltt_session *session,
+ int wait, int nb_streams)
{
int ret;
assert(output);
assert(session);
- if (!output->ust_sockets_copied) {
- ret = consumer_copy_sockets(output->consumer, usess->consumer);
- if (ret < 0) {
- goto error;
- }
- output->ust_sockets_copied = 1;
+ /* Get the datetime for the snapshot output directory. */
+ ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime,
+ sizeof(output->datetime));
+ if (!ret) {
+ ret = -EINVAL;
+ goto error;
}
- ret = set_relayd_for_snapshot(usess->consumer, output, session);
+ /*
+ * Copy kernel 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) {
goto error;
}
- ret = ust_app_snapshot_record(usess, output, wait);
+ ret = set_relayd_for_snapshot(usess->consumer, output, session);
if (ret < 0) {
- goto error;
+ goto error_snapshot;
+ }
+
+ ret = ust_app_snapshot_record(usess, output, wait, nb_streams);
+ if (ret < 0) {
+ ret = -LTTNG_ERR_SNAPSHOT_FAIL;
+ if (ret == -EINVAL) {
+ ret = -LTTNG_ERR_INVALID;
+ }
+ 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:
return ret;
}
+/*
+ * Returns the total number of streams for a session or a negative value
+ * on error.
+ */
+static unsigned int get_total_nb_stream(struct ltt_session *session)
+{
+ unsigned int total_streams = 0;
+
+ if (session->kernel_session) {
+ struct ltt_kernel_session *ksess = session->kernel_session;
+
+ total_streams += ksess->stream_count_global;
+ }
+
+ if (session->ust_session) {
+ struct ltt_ust_session *usess = session->ust_session;
+
+ total_streams += ust_app_get_nb_stream(usess);
+ }
+
+ return total_streams;
+}
+
/*
* Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl.
*
{
int ret = LTTNG_OK;
struct snapshot_output *tmp_sout = NULL;
+ unsigned int nb_streams;
assert(session);
}
}
+ /*
+ * Get the total number of stream of that session which is used by the
+ * maximum size of the snapshot feature.
+ */
+ nb_streams = get_total_nb_stream(session);
+
if (session->kernel_session) {
struct ltt_kernel_session *ksess = session->kernel_session;
if (tmp_sout) {
- ret = record_kernel_snapshot(ksess, tmp_sout, session, wait);
+ ret = record_kernel_snapshot(ksess, tmp_sout, session,
+ wait, nb_streams);
if (ret < 0) {
goto error;
}
rcu_read_lock();
cds_lfht_for_each_entry(session->snapshot.output_ht->ht,
&iter.iter, sout, node.node) {
- ret = record_kernel_snapshot(ksess, sout, session, wait);
+ ret = record_kernel_snapshot(ksess, sout,
+ session, wait, nb_streams);
if (ret < 0) {
rcu_read_unlock();
goto error;
struct ltt_ust_session *usess = session->ust_session;
if (tmp_sout) {
- ret = record_ust_snapshot(usess, tmp_sout, session, wait);
+ ret = record_ust_snapshot(usess, tmp_sout, session,
+ wait, nb_streams);
if (ret < 0) {
goto error;
}
rcu_read_lock();
cds_lfht_for_each_entry(session->snapshot.output_ht->ht,
&iter.iter, sout, node.node) {
- ret = record_ust_snapshot(usess, tmp_sout, session, wait);
+ ret = record_ust_snapshot(usess, sout, session,
+ wait, nb_streams);
if (ret < 0) {
rcu_read_unlock();
goto error;
projects / lttng-tools.git / blobdiff