[babeltrace.git] / src / plugins / ctf / lttng-live / metadata.c

/*
 * Copyright 2019 - Francis Deslauriers <francis.deslauriers@efficios.com>
 * Copyright 2016 - Philippe Proulx <pproulx@efficios.com>
 * Copyright 2010-2011 - EfficiOS Inc. and Linux Foundation
 *
 * Some functions are based on older functions written by Mathieu Desnoyers.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#define BT_COMP_LOG_SELF_COMP self_comp
#define BT_LOG_OUTPUT_LEVEL log_level
#define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/META"
#include "logging/comp-logging.h"

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdbool.h>
#include <glib.h>
#include "compat/memstream.h"
#include <babeltrace2/babeltrace.h>

#include "metadata.h"
#include "../common/metadata/decoder.h"
#include "../common/metadata/ctf-meta-configure-ir-trace.h"

#define TSDL_MAGIC	0x75d11d57

struct packet_header {
	uint32_t magic;
	uint8_t  uuid[16];
	uint32_t checksum;
	uint32_t content_size;
	uint32_t packet_size;
	uint8_t  compression_scheme;
	uint8_t  encryption_scheme;
	uint8_t  checksum_scheme;
	uint8_t  major;
	uint8_t  minor;
} __attribute__((__packed__));


static
bool stream_classes_all_have_default_clock_class(bt_trace_class *tc,
		bt_logging_level log_level,
		bt_self_component *self_comp)
{
	uint64_t i, sc_count;
	const bt_clock_class *cc = NULL;
	const bt_stream_class *sc;
	bool ret = true;

	sc_count = bt_trace_class_get_stream_class_count(tc);
	for (i = 0; i < sc_count; i++) {
		sc = bt_trace_class_borrow_stream_class_by_index_const(tc, i);

		BT_ASSERT(sc);

		cc = bt_stream_class_borrow_default_clock_class_const(sc);
		if (!cc) {
			ret = false;
			BT_COMP_LOGE_APPEND_CAUSE(self_comp,
				"Stream class doesn't have a default clock class: "
				"sc-id=%" PRIu64 ", sc-name=\"%s\"",
				bt_stream_class_get_id(sc),
				bt_stream_class_get_name(sc));
			goto end;
		}
	}

end:
	return ret;
}
/*
 * Iterate over the stream classes and returns the first clock class
 * encountered. This is useful to create message iterator inactivity message as
 * we don't need a particular clock class.
 */
static
const bt_clock_class *borrow_any_clock_class(bt_trace_class *tc)
{
	uint64_t i, sc_count;
	const bt_clock_class *cc = NULL;
	const bt_stream_class *sc;

	sc_count = bt_trace_class_get_stream_class_count(tc);
	for (i = 0; i < sc_count; i++) {
		sc = bt_trace_class_borrow_stream_class_by_index_const(tc, i);
		BT_ASSERT_DBG(sc);

		cc = bt_stream_class_borrow_default_clock_class_const(sc);
		if (cc) {
			goto end;
		}
	}
end:
	BT_ASSERT_DBG(cc);
	return cc;
}

BT_HIDDEN
enum lttng_live_iterator_status lttng_live_metadata_update(
		struct lttng_live_trace *trace)
{
	struct lttng_live_session *session = trace->session;
	struct lttng_live_metadata *metadata = trace->metadata;
	size_t size, len_read = 0;
	char *metadata_buf = NULL;
	bool keep_receiving;
	FILE *fp = NULL;
	enum ctf_metadata_decoder_status decoder_status;
	enum lttng_live_iterator_status status =
		LTTNG_LIVE_ITERATOR_STATUS_OK;
	bt_logging_level log_level = trace->log_level;
	bt_self_component *self_comp = trace->self_comp;
	enum lttng_live_get_one_metadata_status metadata_status;

	/* No metadata stream yet. */
	if (!metadata) {
		if (session->new_streams_needed) {
			status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
		} else {
			session->new_streams_needed = true;
			status = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
		}
		goto end;
	}

	if (!metadata->trace) {
		trace->new_metadata_needed = false;
	}

	if (!trace->new_metadata_needed) {
		goto end;
	}

	/* Open for writing */
	fp = bt_open_memstream(&metadata_buf, &size);
	if (!fp) {
		if (errno == EINTR &&
				lttng_live_graph_is_canceled(session->lttng_live_msg_iter)) {
			status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
		} else {
			BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp,
				"Metadata open_memstream", ".");
			status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
		}
		goto end;
	}

	keep_receiving = true;
	/* Grab all available metadata. */
	while (keep_receiving) {
		size_t reply_len = 0;
		/*
		 * lttng_live_get_one_metadata_packet() asks the Relay Daemon
		 * for new metadata. If new metadata is received, the function
		 * writes it to the provided file handle and updates the
		 * reply_len output parameter. We call this function in loop
		 * until it returns _END meaning that no new metadata is
		 * available.
		 * We may receive a _CLOSED status if the metadata stream we
		 * are requesting is no longer available on the relay.
		 * If we receive an _ERROR status, it means there was a
		 * networking, allocating, or some other unrecoverable error.
		 */
		metadata_status = lttng_live_get_one_metadata_packet(trace, fp,
			&reply_len);

		switch (metadata_status) {
		case LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK:
			len_read += reply_len;
			break;
		case LTTNG_LIVE_GET_ONE_METADATA_STATUS_END:
			keep_receiving = false;
			break;
		case LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED:
			keep_receiving = false;
			break;
		case LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR:
			goto error;
		default:
			bt_common_abort();
		}
	}

	/*
	 * A closed metadata stream means the trace is no longer active. Return
	 * _END so that the caller can remove the trace from its list.
	 */
	if (metadata_status == LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED) {
		status = LTTNG_LIVE_ITERATOR_STATUS_END;
		goto end;
	}

	if (bt_close_memstream(&metadata_buf, &size, fp)) {
		BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp,
			"Metadata bt_close_memstream", ".");
	}

	fp = NULL;

	if (len_read == 0) {
		if (!trace->trace) {
			status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
			goto end;
		}
		trace->new_metadata_needed = false;
		goto end;
	}

	fp = bt_fmemopen(metadata_buf, len_read, "rb");
	if (!fp) {
		if (errno == EINTR &&
				lttng_live_graph_is_canceled(session->lttng_live_msg_iter)) {
			status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
		} else {
			BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp,
				"Cannot memory-open metadata buffer", ".");
			status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
		}
		goto end;
	}

	/*
	 * The call to ctf_metadata_decoder_append_content() will append
	 * new metadata to our current trace class.
	 */
	decoder_status = ctf_metadata_decoder_append_content(
		metadata->decoder, fp);
	switch (decoder_status) {
	case CTF_METADATA_DECODER_STATUS_OK:
		if (!trace->trace_class) {
			struct ctf_trace_class *tc =
				ctf_metadata_decoder_borrow_ctf_trace_class(
					metadata->decoder);

			trace->trace_class =
				ctf_metadata_decoder_get_ir_trace_class(
						metadata->decoder);
			trace->trace = bt_trace_create(trace->trace_class);
			if (!trace->trace) {
				BT_COMP_LOGE_APPEND_CAUSE(self_comp,
					"Failed to create bt_trace");
				goto error;
			}
			if (ctf_trace_class_configure_ir_trace(tc,
					trace->trace)) {
				BT_COMP_LOGE_APPEND_CAUSE(self_comp,
					"Failed to configure ctf trace class");
				goto error;
			}
			if (!stream_classes_all_have_default_clock_class(
					trace->trace_class, log_level,
					self_comp)) {
				/* Error logged in function. */
				goto error;
			}
			trace->clock_class =
				borrow_any_clock_class(trace->trace_class);
		}
		trace->new_metadata_needed = false;

		break;
	case CTF_METADATA_DECODER_STATUS_INCOMPLETE:
		status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
		break;
	default:
		goto error;
	}

	goto end;

error:
	status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
end:
	if (fp) {
		int closeret;

		closeret = fclose(fp);
		if (closeret) {
			BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp,
				"Error on fclose", ".");
		}
	}
	free(metadata_buf);
	return status;
}

BT_HIDDEN
int lttng_live_metadata_create_stream(struct lttng_live_session *session,
		uint64_t ctf_trace_id, uint64_t stream_id,
		const char *trace_name)
{
	bt_self_component *self_comp = session->self_comp;
	bt_logging_level log_level = session->log_level;
	struct lttng_live_metadata *metadata = NULL;
	struct lttng_live_trace *trace;
	struct ctf_metadata_decoder_config cfg = {
		.log_level = session->log_level,
		.self_comp = session->self_comp,
		.clock_class_offset_s = 0,
		.clock_class_offset_ns = 0,
		.create_trace_class = true,
	};

	metadata = g_new0(struct lttng_live_metadata, 1);
	if (!metadata) {
		return -1;
	}
	metadata->log_level = session->log_level;
	metadata->self_comp = session->self_comp;
	metadata->stream_id = stream_id;

	metadata->decoder = ctf_metadata_decoder_create(&cfg);
	if (!metadata->decoder) {
		BT_COMP_LOGE_APPEND_CAUSE(self_comp,
			"Failed to create CTF metadata decoder");
		goto error;
	}
	trace = lttng_live_borrow_trace(session, ctf_trace_id);
	if (!trace) {
		BT_COMP_LOGE_APPEND_CAUSE(self_comp,
			"Failed to borrow trace");
		goto error;
	}
	metadata->trace = trace;
	trace->metadata = metadata;
	return 0;

error:
	ctf_metadata_decoder_destroy(metadata->decoder);
	g_free(metadata);
	return -1;
}

BT_HIDDEN
void lttng_live_metadata_fini(struct lttng_live_trace *trace)
{
	struct lttng_live_metadata *metadata = trace->metadata;

	if (!metadata) {
		return;
	}
	ctf_metadata_decoder_destroy(metadata->decoder);
	trace->metadata = NULL;
	g_free(metadata);
}
Commit	Line	Data
7cdc2bab	1	/*
14f28187	2	* Copyright 2019 - Francis Deslauriers <francis.deslauriers@efficios.com>
7cdc2bab MD	3	* Copyright 2016 - Philippe Proulx <pproulx@efficios.com>
	4	* Copyright 2010-2011 - EfficiOS Inc. and Linux Foundation
	5	*
	6	* Some functions are based on older functions written by Mathieu Desnoyers.
	7	*
	8	* Permission is hereby granted, free of charge, to any person obtaining a copy
	9	* of this software and associated documentation files (the "Software"), to deal
	10	* in the Software without restriction, including without limitation the rights
	11	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	12	* copies of the Software, and to permit persons to whom the Software is
	13	* furnished to do so, subject to the following conditions:
	14	*
	15	* The above copyright notice and this permission notice shall be included in
	16	* all copies or substantial portions of the Software.
	17	*
	18	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	19	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	20	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	21	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	22	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	23	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	24	* SOFTWARE.
	25	*/
	26
2ece7dd0	27	#define BT_COMP_LOG_SELF_COMP self_comp
c01594de	28	#define BT_LOG_OUTPUT_LEVEL log_level
350ad6c1	29	#define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/META"
d9c39b0a	30	#include "logging/comp-logging.h"
020bc26f	31
7cdc2bab MD	32	#include <stdio.h>
	33	#include <stdint.h>
	34	#include <stdlib.h>
	35	#include <stdbool.h>
	36	#include <glib.h>
578e048b	37	#include "compat/memstream.h"
3fadfbc0	38	#include <babeltrace2/babeltrace.h>
7cdc2bab	39
7cdc2bab MD	40	#include "metadata.h"
7cdc2bab MD	41	#include "../common/metadata/decoder.h"
335a2da5	42	#include "../common/metadata/ctf-meta-configure-ir-trace.h"
7cdc2bab MD	43
	44	#define TSDL_MAGIC 0x75d11d57
	45
	46	struct packet_header {
	47	uint32_t magic;
	48	uint8_t uuid[16];
	49	uint32_t checksum;
	50	uint32_t content_size;
	51	uint32_t packet_size;
	52	uint8_t compression_scheme;
	53	uint8_t encryption_scheme;
	54	uint8_t checksum_scheme;
	55	uint8_t major;
	56	uint8_t minor;
	57	} __attribute__((__packed__));
	58
14f28187	59
7cdc2bab	60	static
c01594de	61	bool stream_classes_all_have_default_clock_class(bt_trace_class *tc,
2ece7dd0 PP	62	bt_logging_level log_level,
2ece7dd0 PP	63	bt_self_component *self_comp)
7cdc2bab	64	{
14f28187 FD	65	uint64_t i, sc_count;
	66	const bt_clock_class *cc = NULL;
	67	const bt_stream_class *sc;
	68	bool ret = true;
7cdc2bab	69
14f28187 FD	70	sc_count = bt_trace_class_get_stream_class_count(tc);
	71	for (i = 0; i < sc_count; i++) {
	72	sc = bt_trace_class_borrow_stream_class_by_index_const(tc, i);
7cdc2bab	73
14f28187	74	BT_ASSERT(sc);
7cdc2bab	75
14f28187 FD	76	cc = bt_stream_class_borrow_default_clock_class_const(sc);
	77	if (!cc) {
	78	ret = false;
1419db2b FD	79	BT_COMP_LOGE_APPEND_CAUSE(self_comp,
1419db2b FD	80	"Stream class doesn't have a default clock class: "
14f28187 FD	81	"sc-id=%" PRIu64 ", sc-name=\"%s\"",
	82	bt_stream_class_get_id(sc),
	83	bt_stream_class_get_name(sc));
	84	goto end;
7cdc2bab MD	85	}
	86	}
	87
7cdc2bab	88	end:
14f28187 FD	89	return ret;
	90	}
	91	/*
	92	* Iterate over the stream classes and returns the first clock class
	93	* encountered. This is useful to create message iterator inactivity message as
	94	* we don't need a particular clock class.
	95	*/
	96	static
	97	const bt_clock_class borrow_any_clock_class(bt_trace_class tc)
	98	{
	99	uint64_t i, sc_count;
	100	const bt_clock_class *cc = NULL;
	101	const bt_stream_class *sc;
	102
	103	sc_count = bt_trace_class_get_stream_class_count(tc);
	104	for (i = 0; i < sc_count; i++) {
	105	sc = bt_trace_class_borrow_stream_class_by_index_const(tc, i);
98b15851	106	BT_ASSERT_DBG(sc);
14f28187 FD	107
	108	cc = bt_stream_class_borrow_default_clock_class_const(sc);
	109	if (cc) {
	110	goto end;
	111	}
	112	}
	113	end:
98b15851	114	BT_ASSERT_DBG(cc);
14f28187	115	return cc;
7cdc2bab MD	116	}
	117
	118	BT_HIDDEN
14f28187	119	enum lttng_live_iterator_status lttng_live_metadata_update(
7cdc2bab MD	120	struct lttng_live_trace *trace)
	121	{
	122	struct lttng_live_session *session = trace->session;
7cdc2bab	123	struct lttng_live_metadata *metadata = trace->metadata;
7cdc2bab MD	124	size_t size, len_read = 0;
7cdc2bab MD	125	char *metadata_buf = NULL;
c28512ab	126	bool keep_receiving;
7cdc2bab MD	127	FILE *fp = NULL;
7cdc2bab MD	128	enum ctf_metadata_decoder_status decoder_status;
14f28187 FD	129	enum lttng_live_iterator_status status =
14f28187 FD	130	LTTNG_LIVE_ITERATOR_STATUS_OK;
c01594de	131	bt_logging_level log_level = trace->log_level;
2ece7dd0	132	bt_self_component *self_comp = trace->self_comp;
c28512ab	133	enum lttng_live_get_one_metadata_status metadata_status;
7cdc2bab MD	134
	135	/* No metadata stream yet. */
	136	if (!metadata) {
	137	if (session->new_streams_needed) {
14f28187	138	status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
7cdc2bab MD	139	} else {
7cdc2bab MD	140	session->new_streams_needed = true;
14f28187	141	status = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
7cdc2bab MD	142	}
	143	goto end;
	144	}
	145
6f79a7cf MD	146	if (!metadata->trace) {
	147	trace->new_metadata_needed = false;
	148	}
	149
7cdc2bab MD	150	if (!trace->new_metadata_needed) {
	151	goto end;
	152	}
	153
	154	/* Open for writing */
	155	fp = bt_open_memstream(&metadata_buf, &size);
	156	if (!fp) {
5b959469 FD	157	if (errno == EINTR &&
	158	lttng_live_graph_is_canceled(session->lttng_live_msg_iter)) {
	159	status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
	160	} else {
	161	BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp,
	162	"Metadata open_memstream", ".");
	163	status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
	164	}
	165	goto end;
7cdc2bab MD	166	}
7cdc2bab MD	167
c28512ab	168	keep_receiving = true;
7cdc2bab	169	/* Grab all available metadata. */
c28512ab FD	170	while (keep_receiving) {
c28512ab FD	171	size_t reply_len = 0;
7cdc2bab	172	/*
c28512ab FD	173	* lttng_live_get_one_metadata_packet() asks the Relay Daemon
	174	* for new metadata. If new metadata is received, the function
	175	* writes it to the provided file handle and updates the
	176	* reply_len output parameter. We call this function in loop
	177	* until it returns _END meaning that no new metadata is
	178	* available.
	179	* We may receive a _CLOSED status if the metadata stream we
	180	* are requesting is no longer available on the relay.
	181	* If we receive an _ERROR status, it means there was a
	182	* networking, allocating, or some other unrecoverable error.
7cdc2bab	183	*/
c28512ab FD	184	metadata_status = lttng_live_get_one_metadata_packet(trace, fp,
	185	&reply_len);
	186
	187	switch (metadata_status) {
	188	case LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK:
	189	len_read += reply_len;
	190	break;
	191	case LTTNG_LIVE_GET_ONE_METADATA_STATUS_END:
	192	keep_receiving = false;
	193	break;
	194	case LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED:
	195	keep_receiving = false;
	196	break;
	197	case LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR:
	198	goto error;
	199	default:
498e7994	200	bt_common_abort();
7cdc2bab	201	}
c28512ab	202	}
7cdc2bab MD	203
7cdc2bab MD	204	/*
c28512ab FD	205	* A closed metadata stream means the trace is no longer active. Return
c28512ab FD	206	* _END so that the caller can remove the trace from its list.
7cdc2bab	207	*/
c28512ab FD	208	if (metadata_status == LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED) {
	209	status = LTTNG_LIVE_ITERATOR_STATUS_END;
	210	goto end;
7cdc2bab MD	211	}
	212
	213	if (bt_close_memstream(&metadata_buf, &size, fp)) {
1419db2b FD	214	BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp,
1419db2b FD	215	"Metadata bt_close_memstream", ".");
7cdc2bab	216	}
e7c34fd7	217
7cdc2bab MD	218	fp = NULL;
	219
	220	if (len_read == 0) {
	221	if (!trace->trace) {
14f28187	222	status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
7cdc2bab MD	223	goto end;
	224	}
	225	trace->new_metadata_needed = false;
	226	goto end;
	227	}
	228
7cdc2bab MD	229	fp = bt_fmemopen(metadata_buf, len_read, "rb");
7cdc2bab MD	230	if (!fp) {
5b959469 FD	231	if (errno == EINTR &&
	232	lttng_live_graph_is_canceled(session->lttng_live_msg_iter)) {
	233	status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
	234	} else {
	235	BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp,
	236	"Cannot memory-open metadata buffer", ".");
	237	status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
	238	}
	239	goto end;
7cdc2bab MD	240	}
7cdc2bab MD	241
14f28187	242	/*
06be9946 PP	243	* The call to ctf_metadata_decoder_append_content() will append
06be9946 PP	244	* new metadata to our current trace class.
14f28187	245	*/
06be9946 PP	246	decoder_status = ctf_metadata_decoder_append_content(
06be9946 PP	247	metadata->decoder, fp);
7cdc2bab MD	248	switch (decoder_status) {
7cdc2bab MD	249	case CTF_METADATA_DECODER_STATUS_OK:
14f28187	250	if (!trace->trace_class) {
335a2da5 PP	251	struct ctf_trace_class *tc =
	252	ctf_metadata_decoder_borrow_ctf_trace_class(
	253	metadata->decoder);
	254
14f28187 FD	255	trace->trace_class =
	256	ctf_metadata_decoder_get_ir_trace_class(
	257	metadata->decoder);
	258	trace->trace = bt_trace_create(trace->trace_class);
335a2da5	259	if (!trace->trace) {
1419db2b FD	260	BT_COMP_LOGE_APPEND_CAUSE(self_comp,
1419db2b FD	261	"Failed to create bt_trace");
335a2da5 PP	262	goto error;
	263	}
	264	if (ctf_trace_class_configure_ir_trace(tc,
	265	trace->trace)) {
1419db2b FD	266	BT_COMP_LOGE_APPEND_CAUSE(self_comp,
1419db2b FD	267	"Failed to configure ctf trace class");
335a2da5 PP	268	goto error;
335a2da5 PP	269	}
14f28187	270	if (!stream_classes_all_have_default_clock_class(
2ece7dd0 PP	271	trace->trace_class, log_level,
2ece7dd0 PP	272	self_comp)) {
14f28187 FD	273	/* Error logged in function. */
	274	goto error;
	275	}
	276	trace->clock_class =
	277	borrow_any_clock_class(trace->trace_class);
7cdc2bab	278	}
14f28187 FD	279	trace->new_metadata_needed = false;
14f28187 FD	280
7cdc2bab MD	281	break;
7cdc2bab MD	282	case CTF_METADATA_DECODER_STATUS_INCOMPLETE:
14f28187	283	status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
7cdc2bab	284	break;
1a6da3f9	285	default:
7cdc2bab MD	286	goto error;
	287	}
	288
	289	goto end;
c28512ab	290
7cdc2bab	291	error:
5b959469	292	status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
7cdc2bab MD	293	end:
	294	if (fp) {
	295	int closeret;
	296
	297	closeret = fclose(fp);
	298	if (closeret) {
1419db2b FD	299	BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp,
1419db2b FD	300	"Error on fclose", ".");
7cdc2bab MD	301	}
7cdc2bab MD	302	}
6f79a7cf	303	free(metadata_buf);
7cdc2bab MD	304	return status;
	305	}
	306
	307	BT_HIDDEN
	308	int lttng_live_metadata_create_stream(struct lttng_live_session *session,
2ece7dd0	309	uint64_t ctf_trace_id, uint64_t stream_id,
06994c71	310	const char *trace_name)
7cdc2bab	311	{
1419db2b FD	312	bt_self_component *self_comp = session->self_comp;
1419db2b FD	313	bt_logging_level log_level = session->log_level;
7cdc2bab MD	314	struct lttng_live_metadata *metadata = NULL;
7cdc2bab MD	315	struct lttng_live_trace *trace;
0746848c	316	struct ctf_metadata_decoder_config cfg = {
c01594de	317	.log_level = session->log_level,
2ece7dd0	318	.self_comp = session->self_comp,
0746848c PP	319	.clock_class_offset_s = 0,
0746848c PP	320	.clock_class_offset_ns = 0,
06be9946	321	.create_trace_class = true,
0746848c	322	};
7cdc2bab MD	323
	324	metadata = g_new0(struct lttng_live_metadata, 1);
	325	if (!metadata) {
	326	return -1;
	327	}
c01594de	328	metadata->log_level = session->log_level;
2ece7dd0	329	metadata->self_comp = session->self_comp;
7cdc2bab	330	metadata->stream_id = stream_id;
14f28187	331
f7b785ac	332	metadata->decoder = ctf_metadata_decoder_create(&cfg);
7cdc2bab	333	if (!metadata->decoder) {
1419db2b FD	334	BT_COMP_LOGE_APPEND_CAUSE(self_comp,
1419db2b FD	335	"Failed to create CTF metadata decoder");
7cdc2bab MD	336	goto error;
7cdc2bab MD	337	}
14f28187	338	trace = lttng_live_borrow_trace(session, ctf_trace_id);
7cdc2bab	339	if (!trace) {
1419db2b FD	340	BT_COMP_LOGE_APPEND_CAUSE(self_comp,
1419db2b FD	341	"Failed to borrow trace");
7cdc2bab MD	342	goto error;
	343	}
	344	metadata->trace = trace;
	345	trace->metadata = metadata;
	346	return 0;
	347
	348	error:
	349	ctf_metadata_decoder_destroy(metadata->decoder);
	350	g_free(metadata);
	351	return -1;
	352	}
	353
	354	BT_HIDDEN
	355	void lttng_live_metadata_fini(struct lttng_live_trace *trace)
	356	{
	357	struct lttng_live_metadata *metadata = trace->metadata;
	358
	359	if (!metadata) {
	360	return;
	361	}
7cdc2bab MD	362	ctf_metadata_decoder_destroy(metadata->decoder);
7cdc2bab MD	363	trace->metadata = NULL;
7cdc2bab MD	364	g_free(metadata);
7cdc2bab MD	365	}