+
+LTTNG_HIDDEN
+int mi_lttng_domains_open(struct mi_writer *writer)
+{
+ return mi_lttng_writer_open_element(writer, config_element_domains);
+}
+
+LTTNG_HIDDEN
+int mi_lttng_domain(struct mi_writer *writer,
+ struct lttng_domain *domain, int is_open)
+{
+ int ret = 0;
+ const char *str_domain;
+ const char *str_buffer;
+
+ assert(domain);
+
+ /* Open domain element */
+ ret = mi_lttng_writer_open_element(writer, config_element_domain);
+ if (ret) {
+ goto end;
+ }
+
+ /* Domain Type */
+ str_domain = mi_lttng_domaintype_string(domain->type);
+ ret = mi_lttng_writer_write_element_string(writer, config_element_type,
+ str_domain);
+ if (ret) {
+ goto end;
+ }
+
+ /* Buffer Type */
+ str_buffer= mi_lttng_buffertype_string(domain->buf_type);
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_buffer_type, str_buffer);
+ if (ret) {
+ goto end;
+ }
+
+ /* TODO: union attr
+ * This union is not currently used and was added for
+ * future ust domain support.
+ * Date: 25-06-2014
+ * */
+
+ if (!is_open) {
+ /* Closing domain element */
+ ret = mi_lttng_writer_close_element(writer);
+ }
+
+end:
+ return ret;
+
+}
+
+LTTNG_HIDDEN
+int mi_lttng_channels_open(struct mi_writer *writer)
+{
+ return mi_lttng_writer_open_element(writer, config_element_channels);
+}
+
+LTTNG_HIDDEN
+int mi_lttng_channel(struct mi_writer *writer,
+ struct lttng_channel *channel, int is_open)
+{
+ int ret = 0;
+
+ assert(channel);
+
+ /* Opening channel element */
+ ret = mi_lttng_writer_open_element(writer, config_element_channel);
+ if (ret) {
+ goto end;
+ }
+
+ /* Name */
+ ret = mi_lttng_writer_write_element_string(writer, config_element_name,
+ channel->name);
+ if (ret) {
+ goto end;
+ }
+
+ /* Enabled ? */
+ ret = mi_lttng_writer_write_element_bool(writer,
+ config_element_enabled, channel->enabled);
+ if (ret) {
+ goto end;
+ }
+
+ /* Attribute */
+ ret = mi_lttng_channel_attr(writer, &channel->attr);
+ if (ret) {
+ goto end;
+ }
+
+ if (!is_open) {
+ /* Closing channel element */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ goto end;
+ }
+ }
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+int mi_lttng_channel_attr(struct mi_writer *writer,
+ struct lttng_channel_attr *attr)
+{
+ int ret = 0;
+ struct lttng_channel *chan = caa_container_of(attr,
+ struct lttng_channel, attr);
+ uint64_t discarded_events, lost_packets, monitor_timer_interval;
+ int64_t blocking_timeout;
+
+ assert(attr);
+
+ ret = lttng_channel_get_discarded_event_count(chan, &discarded_events);
+ if (ret) {
+ goto end;
+ }
+
+ ret = lttng_channel_get_lost_packet_count(chan, &lost_packets);
+ if (ret) {
+ goto end;
+ }
+
+ ret = lttng_channel_get_monitor_timer_interval(chan,
+ &monitor_timer_interval);
+ if (ret) {
+ goto end;
+ }
+
+ ret = lttng_channel_get_blocking_timeout(chan,
+ &blocking_timeout);
+ if (ret) {
+ goto end;
+ }
+
+ /* Opening Attributes */
+ ret = mi_lttng_writer_open_element(writer, config_element_attributes);
+ if (ret) {
+ goto end;
+ }
+
+ /* Overwrite */
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_overwrite_mode,
+ attr->overwrite ? config_overwrite_mode_overwrite :
+ config_overwrite_mode_discard);
+ if (ret) {
+ goto end;
+ }
+
+ /* Sub buffer size in byte */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ config_element_subbuf_size, attr->subbuf_size);
+ if (ret) {
+ goto end;
+ }
+
+ /* Number of subbuffer (power of two) */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ config_element_num_subbuf,
+ attr->num_subbuf);
+ if (ret) {
+ goto end;
+ }
+
+ /* Switch timer interval in usec */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ config_element_switch_timer_interval,
+ attr->switch_timer_interval);
+ if (ret) {
+ goto end;
+ }
+
+ /* Read timer interval in usec */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ config_element_read_timer_interval,
+ attr->read_timer_interval);
+ if (ret) {
+ goto end;
+ }
+
+ /* Monitor timer interval in usec */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ config_element_monitor_timer_interval,
+ monitor_timer_interval);
+ if (ret) {
+ goto end;
+ }
+
+ /* Retry timeout in usec */
+ ret = mi_lttng_writer_write_element_signed_int(writer,
+ config_element_blocking_timeout,
+ blocking_timeout);
+ if (ret) {
+ goto end;
+ }
+
+ /* Event output */
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_output_type,
+ attr->output == LTTNG_EVENT_SPLICE ?
+ config_output_type_splice : config_output_type_mmap);
+ if (ret) {
+ goto end;
+ }
+
+ /* Tracefile size in bytes */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ config_element_tracefile_size, attr->tracefile_size);
+ if (ret) {
+ goto end;
+ }
+
+ /* Count of tracefiles */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ config_element_tracefile_count,
+ attr->tracefile_count);
+ if (ret) {
+ goto end;
+ }
+
+ /* Live timer interval in usec*/
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ config_element_live_timer_interval,
+ attr->live_timer_interval);
+ if (ret) {
+ goto end;
+ }
+
+ /* Discarded events */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ config_element_discarded_events,
+ discarded_events);
+ if (ret) {
+ goto end;
+ }
+
+ /* Lost packets */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ config_element_lost_packets,
+ lost_packets);
+ if (ret) {
+ goto end;
+ }
+
+ /* Closing attributes */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ goto end;
+ }
+end:
+ return ret;
+
+}
+
+LTTNG_HIDDEN
+int mi_lttng_event_common_attributes(struct mi_writer *writer,
+ struct lttng_event *event)
+{
+ int ret;
+ const char *filter_expression;
+
+ /* Open event element */
+ ret = mi_lttng_writer_open_element(writer, config_element_event);
+ if (ret) {
+ goto end;
+ }
+
+ /* Event name */
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_name, event->name);
+ if (ret) {
+ goto end;
+ }
+
+ /* Event type */
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_type, mi_lttng_eventtype_string(event->type));
+ if (ret) {
+ goto end;
+ }
+
+ /* Is event enabled */
+ ret = mi_lttng_writer_write_element_bool(writer,
+ config_element_enabled, event->enabled);
+ if (ret) {
+ goto end;
+ }
+
+ /* Event filter expression */
+ ret = lttng_event_get_filter_expression(event, &filter_expression);
+ if (ret) {
+ goto end;
+ }
+
+ if (filter_expression) {
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_filter_expression,
+ filter_expression);
+ if (ret) {
+ goto end;
+ }
+ }
+
+end:
+ return ret;
+}
+
+static int write_event_exclusions(struct mi_writer *writer,
+ struct lttng_event *event)
+{
+ int i;
+ int ret;
+ int exclusion_count;
+
+ /* Open event exclusions */
+ ret = mi_lttng_writer_open_element(writer, config_element_exclusions);
+ if (ret) {
+ goto end;
+ }
+
+ exclusion_count = lttng_event_get_exclusion_name_count(event);
+ if (exclusion_count < 0) {
+ ret = exclusion_count;
+ goto end;
+ }
+
+ for (i = 0; i < exclusion_count; i++) {
+ const char *name;
+
+ ret = lttng_event_get_exclusion_name(event, i, &name);
+ if (ret) {
+ /* Close exclusions */
+ mi_lttng_writer_close_element(writer);
+ goto end;
+ }
+
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_exclusion, name);
+ if (ret) {
+ /* Close exclusions */
+ mi_lttng_writer_close_element(writer);
+ goto end;
+ }
+ }
+
+ /* Close exclusions */
+ ret = mi_lttng_writer_close_element(writer);
+
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+int mi_lttng_event_tracepoint_loglevel(struct mi_writer *writer,
+ struct lttng_event *event, enum lttng_domain_type domain)
+{
+ int ret;
+
+ /* Event loglevel */
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_loglevel,
+ mi_lttng_loglevel_string(event->loglevel, domain));
+ if (ret) {
+ goto end;
+ }
+
+ /* Log level type */
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_loglevel_type,
+ mi_lttng_logleveltype_string(event->loglevel_type));
+ if (ret) {
+ goto end;
+ }
+
+ /* Event exclusions */
+ ret = write_event_exclusions(writer, event);
+
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+int mi_lttng_event_tracepoint_no_loglevel(struct mi_writer *writer,
+ struct lttng_event *event)
+{
+ /* event exclusion filter */
+ return write_event_exclusions(writer, event);
+}
+
+LTTNG_HIDDEN
+int mi_lttng_event_function_probe(struct mi_writer *writer,
+ struct lttng_event *event)
+{
+ int ret;
+
+ ret = mi_lttng_writer_open_element(writer, config_element_attributes);
+ if (ret) {
+ goto end;
+ }
+
+ ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
+ if (ret) {
+ goto end;
+ }
+
+ if (event->attr.probe.addr != 0) {
+ /* event probe address */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ config_element_address, event->attr.probe.addr);
+ if (ret) {
+ goto end;
+ }
+ } else {
+ /* event probe offset */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ config_element_offset, event->attr.probe.offset);
+ if (ret) {
+ goto end;
+ }
+
+ /* event probe symbol_name */
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_symbol_name, event->attr.probe.symbol_name);
+ if (ret) {
+ goto end;
+ }
+ }
+
+ /* Close probe_attributes and attributes */
+ ret = mi_lttng_close_multi_element(writer, 2);
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+int mi_lttng_event_function_entry(struct mi_writer *writer,
+ struct lttng_event *event)
+{
+ int ret;
+
+ ret = mi_lttng_writer_open_element(writer, config_element_attributes);
+ if (ret) {
+ goto end;
+ }
+
+ ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
+ if (ret) {
+ goto end;
+ }
+
+ /* event probe symbol_name */
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_symbol_name, event->attr.ftrace.symbol_name);
+ if (ret) {
+ goto end;
+ }
+
+ /* Close function_attributes and attributes */
+ ret = mi_lttng_close_multi_element(writer, 2);
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+int mi_lttng_events_open(struct mi_writer *writer)
+{
+ return mi_lttng_writer_open_element(writer, config_element_events);
+}
+
+LTTNG_HIDDEN
+int mi_lttng_event(struct mi_writer *writer,
+ struct lttng_event *event, int is_open, enum lttng_domain_type domain)
+{
+ int ret;
+
+ ret = mi_lttng_event_common_attributes(writer, event);
+ if (ret) {
+ goto end;
+ }
+
+ switch (event->type) {
+ case LTTNG_EVENT_TRACEPOINT:
+ {
+ if (event->loglevel != -1) {
+ ret = mi_lttng_event_tracepoint_loglevel(writer, event, domain);
+ } else {
+ ret = mi_lttng_event_tracepoint_no_loglevel(writer, event);
+ }
+ break;
+ }
+ case LTTNG_EVENT_FUNCTION:
+ /* Fallthrough */
+ case LTTNG_EVENT_PROBE:
+ ret = mi_lttng_event_function_probe(writer, event);
+ break;
+ case LTTNG_EVENT_FUNCTION_ENTRY:
+ ret = mi_lttng_event_function_entry(writer, event);
+ break;
+ case LTTNG_EVENT_ALL:
+ /* Fallthrough */
+ default:
+ break;
+ }
+
+ if (!is_open) {
+ ret = mi_lttng_writer_close_element(writer);
+ }
+
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+int mi_lttng_trackers_open(struct mi_writer *writer)
+{
+ return mi_lttng_writer_open_element(writer, config_element_trackers);
+}
+
+LTTNG_HIDDEN
+int mi_lttng_pid_tracker_open(struct mi_writer *writer)
+{
+ int ret;
+
+ /* Open element pid_tracker */
+ ret = mi_lttng_writer_open_element(writer, config_element_pid_tracker);
+ if (ret) {
+ goto end;
+ }
+
+ /* Open targets element */
+ ret = mi_lttng_targets_open(writer);
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+int mi_lttng_pids_open(struct mi_writer *writer)
+{
+ return mi_lttng_writer_open_element(writer, config_element_pids);
+}
+
+/*
+ * TODO: move the listing of pid for user agent to process semantic on
+ * mi api bump. The use of process element break the mi api.
+ */
+LTTNG_HIDDEN
+int mi_lttng_pid(struct mi_writer *writer, pid_t pid , const char *name,
+ int is_open)
+{
+ int ret;
+
+ /* Open pid process */
+ ret = mi_lttng_writer_open_element(writer, config_element_pid);
+ if (ret) {
+ goto end;
+ }
+
+ /* Writing pid number */
+ ret = mi_lttng_writer_write_element_signed_int(writer,
+ mi_lttng_element_pid_id, (int)pid);
+ if (ret) {
+ goto end;
+ }
+
+ /* Writing name of the process */
+ if (name) {
+ ret = mi_lttng_writer_write_element_string(writer, config_element_name,
+ name);
+ if (ret) {
+ goto end;
+ }
+ }
+
+ if (!is_open) {
+ /* Closing Pid */
+ ret = mi_lttng_writer_close_element(writer);
+ }
+
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+int mi_lttng_targets_open(struct mi_writer *writer)
+{
+ return mi_lttng_writer_open_element(writer,
+ config_element_targets);
+}
+
+LTTNG_HIDDEN
+int mi_lttng_pid_target(struct mi_writer *writer, pid_t pid, int is_open)
+{
+ int ret;
+
+ ret = mi_lttng_writer_open_element(writer,
+ config_element_target_pid);
+ if (ret) {
+ goto end;
+ }
+
+ /* Writing pid number
+ * Special case for element all on track untrack command
+ * All pid is represented as wildcard *
+ */
+ if ((int) pid == -1) {
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_pid,
+ mi_lttng_element_track_untrack_all_wildcard);
+ } else {
+ ret = mi_lttng_writer_write_element_signed_int(writer,
+ config_element_pid, (int) pid);
+ }
+ if (ret) {
+ goto end;
+ }
+
+ if (!is_open) {
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ goto end;
+ }
+ }
+
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+int mi_lttng_event_fields_open(struct mi_writer *writer)
+{
+ return mi_lttng_writer_open_element(writer, mi_lttng_element_event_fields);
+}
+
+LTTNG_HIDDEN
+int mi_lttng_event_field(struct mi_writer *writer,
+ struct lttng_event_field *field)
+{
+ int ret;
+
+ if (!field->field_name[0]) {
+ ret = 0;
+ goto end;
+ }
+
+ /* Open field */
+ ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_field);
+ if (ret) {
+ goto end;
+ }
+
+ if (!field->field_name[0]) {
+ goto close;
+ }
+
+ /* Name */
+ ret = mi_lttng_writer_write_element_string(writer, config_element_name,
+ field->field_name);
+ if (ret) {
+ goto end;
+ }
+
+ /* Type */
+ ret = mi_lttng_writer_write_element_string(writer, config_element_type,
+ mi_lttng_eventfieldtype_string(field->type));
+ if (ret) {
+ goto end;
+ }
+
+ /* nowrite */
+ ret = mi_lttng_writer_write_element_signed_int(writer,
+ mi_lttng_element_nowrite, field->nowrite);
+ if (ret) {
+ goto end;
+ }
+
+close:
+ /* Close field element */
+ ret = mi_lttng_writer_close_element(writer);
+
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+int mi_lttng_perf_counter_context(struct mi_writer *writer,
+ struct lttng_event_perf_counter_ctx *perf_context)
+{
+ int ret;
+
+ /* Open perf_counter_context */
+ ret = mi_lttng_writer_open_element(writer,
+ mi_lttng_element_perf_counter_context);
+ if (ret) {
+ goto end;
+ }
+
+ /* Type */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ config_element_type, perf_context->type);
+ if (ret) {
+ goto end;
+ }
+
+ /* Config */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ config_element_config, perf_context->config);
+ if (ret) {
+ goto end;
+ }
+
+ /* Name of the perf counter */
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_name, perf_context->name);
+ if (ret) {
+ goto end;
+ }
+
+ /* Close perf_counter_context */
+ ret = mi_lttng_writer_close_element(writer);
+end:
+ return ret;
+}
+
+static
+int mi_lttng_app_context(struct mi_writer *writer,
+ const char *provider_name, const char *ctx_name)
+{
+ int ret;
+
+ /* Open app */
+ ret = mi_lttng_writer_open_element(writer,
+ config_element_context_app);
+ if (ret) {
+ goto end;
+ }
+
+ /* provider_name */
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_context_app_provider_name,
+ provider_name);
+ if (ret) {
+ goto end;
+ }
+
+ /* ctx_name */
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_context_app_ctx_name, ctx_name);
+ if (ret) {
+ goto end;
+ }
+
+ /* Close app */
+ ret = mi_lttng_writer_close_element(writer);
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+int mi_lttng_context(struct mi_writer *writer,
+ struct lttng_event_context *context, int is_open)
+{
+ int ret;
+
+ /* Open context */
+ ret = mi_lttng_writer_open_element(writer , config_element_context);
+ if (ret) {
+ goto end;
+ }
+
+ /* Special case for PERF_*_COUNTER
+ * print the lttng_event_perf_counter_ctx*/
+ switch (context->ctx) {
+ case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
+ case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
+ case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
+ {
+ struct lttng_event_perf_counter_ctx *perf_context =
+ &context->u.perf_counter;
+ ret = mi_lttng_perf_counter_context(writer, perf_context);
+ if (ret) {
+ goto end;
+ }
+ break;
+ }
+ case LTTNG_EVENT_CONTEXT_APP_CONTEXT:
+ {
+ ret = mi_lttng_app_context(writer,
+ context->u.app_ctx.provider_name,
+ context->u.app_ctx.ctx_name);
+ if (ret) {
+ goto end;
+ }
+ break;
+ }
+ default:
+ {
+ const char *type_string = mi_lttng_event_contexttype_string(
+ context->ctx);
+ if (!type_string) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ /* Print context type */
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_type, type_string);
+ break;
+ }
+ }
+
+ /* Close context */
+ if (!is_open) {
+ ret = mi_lttng_writer_close_element(writer);
+ }
+
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+int mi_lttng_snapshot_output_session_name(struct mi_writer *writer,
+ const char *session_name)
+{
+ int ret;
+
+ /* Open session element */
+ ret = mi_lttng_writer_open_element(writer, config_element_session);
+ if (ret) {
+ goto end;
+ }
+
+ /* Snapshot output list for current session name */
+ ret = mi_lttng_writer_write_element_string(writer, config_element_name,
+ session_name);
+ if (ret) {
+ goto end;
+ }
+
+ /* Open element snapshots (sequence one snapshot) */
+ ret = mi_lttng_writer_open_element(writer, mi_lttng_element_snapshots);
+ if (ret) {
+ goto end;
+ }
+
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+int mi_lttng_snapshot_list_output(struct mi_writer *writer,
+ struct lttng_snapshot_output *output)
+{
+ int ret;
+
+ /* Open element snapshot output */
+ ret = mi_lttng_writer_open_element(writer,
+ mi_lttng_element_command_snapshot);
+ if (ret) {
+ goto end;
+ }
+
+ /* ID of the snapshot output */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ mi_lttng_element_id, output->id);
+ if (ret) {
+ goto end;
+ }
+
+ /* Name of the output */
+ ret = mi_lttng_writer_write_element_string(writer, config_element_name,
+ output->name);
+ if (ret) {
+ goto end;
+ }
+
+ /* Destination of the output (ctrl_url)*/
+ ret = mi_lttng_writer_write_element_string(writer,
+ mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
+ if (ret) {
+ goto end;
+ }
+
+ /* Destination of the output (data_url) */
+ ret = mi_lttng_writer_write_element_string(writer,
+ mi_lttng_element_snapshot_data_url, output->data_url);
+ if (ret) {
+ goto end;
+ }
+
+ /* total size of all stream combined */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ mi_lttng_element_snapshot_max_size, output->max_size);
+ if (ret) {
+ goto end;
+ }
+
+ /* Close snapshot output element */
+ ret = mi_lttng_writer_close_element(writer);
+
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+int mi_lttng_snapshot_del_output(struct mi_writer *writer, int id,
+ const char *name, const char *current_session_name)
+{
+ int ret;
+
+ /* Open element del_snapshot */
+ ret = mi_lttng_writer_open_element(writer,
+ mi_lttng_element_command_snapshot);
+ if (ret) {
+ goto end;
+ }
+
+
+ if (id != UINT32_MAX) {
+ /* "Snapshot output "id" successfully deleted
+ * for "current_session_name"
+ * ID of the snapshot output
+ */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ mi_lttng_element_id, id);
+ if (ret) {
+ goto end;
+ }
+ } else {
+ /* "Snapshot output "name" successfully deleted
+ * for session "current_session_name"
+ * Name of the output
+ */
+ ret = mi_lttng_writer_write_element_string(writer, config_element_name,
+ name);
+ if (ret) {
+ goto end;
+ }
+ }
+
+ /* Snapshot was deleted for session "current_session_name"*/
+ ret = mi_lttng_writer_write_element_string(writer,
+ mi_lttng_element_snapshot_session_name,
+ current_session_name);
+ if (ret) {
+ goto end;
+ }
+
+ /* Close snapshot element */
+ ret = mi_lttng_writer_close_element(writer);
+
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+int mi_lttng_snapshot_add_output(struct mi_writer *writer,
+ const char *current_session_name, const char *n_ptr,
+ struct lttng_snapshot_output *output)
+{
+ int ret;
+
+ /* Open element snapshot */
+ ret = mi_lttng_writer_open_element(writer,
+ mi_lttng_element_command_snapshot);
+ if (ret) {
+ goto end;
+ }
+
+ /* Snapshot output id */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ mi_lttng_element_id, output->id);
+ if (ret) {
+ goto end;
+ }
+
+ /* Snapshot output names */
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_name, n_ptr);
+ if (ret) {
+ goto end;
+ }
+
+ /* Destination of the output (ctrl_url)*/
+ ret = mi_lttng_writer_write_element_string(writer,
+ mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
+ if (ret) {
+ goto end;
+ }
+
+ /* Snapshot added for session "current_session_name"*/
+ ret = mi_lttng_writer_write_element_string(writer,
+ mi_lttng_element_snapshot_session_name, current_session_name);
+ if (ret) {
+ goto end;
+ }
+
+ /* total size of all stream combined */
+ ret = mi_lttng_writer_write_element_unsigned_int(writer,
+ mi_lttng_element_snapshot_max_size, output->max_size);
+ if (ret) {
+ goto end;
+ }
+
+ /* Close snapshot element */
+ ret = mi_lttng_writer_close_element(writer);
+
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+int mi_lttng_snapshot_record(struct mi_writer *writer,
+ const char *current_session_name, const char *url,
+ const char *cmdline_ctrl_url, const char *cmdline_data_url)
+{
+ int ret;
+
+ /* Open element snapshot */
+ ret = mi_lttng_writer_open_element(writer,
+ mi_lttng_element_command_snapshot);
+ if (ret) {
+ goto end;
+ }
+
+ /*
+ * If a valid an URL was given, serialize it,
+ * else take the command line data and ctrl urls*/
+ if (url) {
+ /* Destination of the output (ctrl_url)*/
+ ret = mi_lttng_writer_write_element_string(writer,
+ mi_lttng_element_snapshot_ctrl_url, url);
+ if (ret) {
+ goto end;
+ }
+ } else if (cmdline_ctrl_url) {
+ /* Destination of the output (ctrl_url)*/
+ ret = mi_lttng_writer_write_element_string(writer,
+ mi_lttng_element_snapshot_ctrl_url, cmdline_ctrl_url);
+ if (ret) {
+ goto end;
+ }
+
+ /* Destination of the output (data_url) */
+ ret = mi_lttng_writer_write_element_string(writer,
+ mi_lttng_element_snapshot_data_url, cmdline_data_url);
+ if (ret) {
+ goto end;
+ }
+ }
+
+ /* Close record_snapshot element */
+ ret = mi_lttng_writer_close_element(writer);
+
+end:
+ return ret;
+}