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

/*
 * SPDX-License-Identifier: MIT
 *
 * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com>
 * Copyright 2016 Philippe Proulx <pproulx@efficios.com>
 * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
 */

#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;

	BT_COMP_LOGD("Updating metadata for trace: trace-id=%"PRIu64, trace->id);

	/* 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 (trace->metadata_stream_state != LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED) {
		goto end;
	}

	/*
	 * Open a new write only file handle to populate the `metadata_buf`
	 * memory buffer so we can write in loop in it easily.
	 */
	fp = bt_open_memstream(&metadata_buf, &size);
	if (!fp) {
		if (errno == EINTR &&
				lttng_live_graph_is_canceled(session->lttng_live_msg_iter)) {
			session->lttng_live_msg_iter->was_interrupted = true;
			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:
			BT_COMP_LOGD("Metadata stream was closed by the Relay, the trace is no longer active: "
				"trace-id=%"PRIu64", metadata-stream-id=%"PRIu64,
				trace->id, metadata->stream_id);
			/*
			 * The stream was closed and we received everything
			 * there was to receive for this metadata stream.
			 * We go on with the decoding of what we received. So
			 * that data stream can be decoded.
			 */
			keep_receiving = false;
			trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_CLOSED;
			break;
		case LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR:
			BT_COMP_LOGE_APPEND_CAUSE(self_comp,
				"Error getting one trace metadata packet: "
				"trace-id=%"PRIu64, trace->id);
			goto error;
		default:
			bt_common_abort();
		}
	}

	/* The memory buffer `metadata_buf` contains all the metadata. */
	if (bt_close_memstream(&metadata_buf, &size, fp)) {
		BT_COMP_LOGW_ERRNO("Metadata bt_close_memstream", ".");
	}

	fp = NULL;

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

		/* The relay sent zero bytes of metdata. */
		trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NOT_NEEDED;
		goto end;
	}

	/*
	 * Open a new reading file handle on the `metadata_buf` and pass it to
	 * the metadata decoder.
	 */
	fp = bt_fmemopen(metadata_buf, len_read, "rb");
	if (!fp) {
		if (errno == EINTR &&
				lttng_live_graph_is_canceled(session->lttng_live_msg_iter)) {
			session->lttng_live_msg_iter->was_interrupted = true;
			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.
	 */
	BT_COMP_LOGD("Appending new metadata to the ctf_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);
		}

		/* The metadata was updated succesfully. */
		trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NOT_NEEDED;

		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_LOGW_ERRNO("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_session_borrow_or_create_trace_by_id(session,
		ctf_trace_id);
	if (!trace) {
		BT_COMP_LOGE_APPEND_CAUSE(self_comp,
			"Failed to borrow trace");
		goto error;
	}
	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	/*
0235b0db	2	* SPDX-License-Identifier: MIT
7cdc2bab	3	*
0235b0db MJ	4	* Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com>
	5	* Copyright 2016 Philippe Proulx <pproulx@efficios.com>
	6	* Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
7cdc2bab MD	7	*/
7cdc2bab MD	8
2ece7dd0	9	#define BT_COMP_LOG_SELF_COMP self_comp
c01594de	10	#define BT_LOG_OUTPUT_LEVEL log_level
350ad6c1	11	#define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/META"
d9c39b0a	12	#include "logging/comp-logging.h"
020bc26f	13
7cdc2bab MD	14	#include <stdio.h>
	15	#include <stdint.h>
	16	#include <stdlib.h>
	17	#include <stdbool.h>
	18	#include <glib.h>
578e048b	19	#include "compat/memstream.h"
3fadfbc0	20	#include <babeltrace2/babeltrace.h>
7cdc2bab	21
7cdc2bab MD	22	#include "metadata.h"
7cdc2bab MD	23	#include "../common/metadata/decoder.h"
335a2da5	24	#include "../common/metadata/ctf-meta-configure-ir-trace.h"
7cdc2bab MD	25
	26	#define TSDL_MAGIC 0x75d11d57
	27
	28	struct packet_header {
	29	uint32_t magic;
	30	uint8_t uuid[16];
	31	uint32_t checksum;
	32	uint32_t content_size;
	33	uint32_t packet_size;
	34	uint8_t compression_scheme;
	35	uint8_t encryption_scheme;
	36	uint8_t checksum_scheme;
	37	uint8_t major;
	38	uint8_t minor;
	39	} __attribute__((__packed__));
	40
14f28187	41
7cdc2bab	42	static
c01594de	43	bool stream_classes_all_have_default_clock_class(bt_trace_class *tc,
2ece7dd0 PP	44	bt_logging_level log_level,
2ece7dd0 PP	45	bt_self_component *self_comp)
7cdc2bab	46	{
14f28187 FD	47	uint64_t i, sc_count;
	48	const bt_clock_class *cc = NULL;
	49	const bt_stream_class *sc;
	50	bool ret = true;
7cdc2bab	51
14f28187 FD	52	sc_count = bt_trace_class_get_stream_class_count(tc);
	53	for (i = 0; i < sc_count; i++) {
	54	sc = bt_trace_class_borrow_stream_class_by_index_const(tc, i);
7cdc2bab	55
14f28187	56	BT_ASSERT(sc);
7cdc2bab	57
14f28187 FD	58	cc = bt_stream_class_borrow_default_clock_class_const(sc);
	59	if (!cc) {
	60	ret = false;
1419db2b FD	61	BT_COMP_LOGE_APPEND_CAUSE(self_comp,
1419db2b FD	62	"Stream class doesn't have a default clock class: "
14f28187 FD	63	"sc-id=%" PRIu64 ", sc-name=\"%s\"",
	64	bt_stream_class_get_id(sc),
	65	bt_stream_class_get_name(sc));
	66	goto end;
7cdc2bab MD	67	}
	68	}
	69
7cdc2bab	70	end:
14f28187 FD	71	return ret;
	72	}
	73	/*
	74	* Iterate over the stream classes and returns the first clock class
	75	* encountered. This is useful to create message iterator inactivity message as
	76	* we don't need a particular clock class.
	77	*/
	78	static
	79	const bt_clock_class borrow_any_clock_class(bt_trace_class tc)
	80	{
	81	uint64_t i, sc_count;
	82	const bt_clock_class *cc = NULL;
	83	const bt_stream_class *sc;
	84
	85	sc_count = bt_trace_class_get_stream_class_count(tc);
	86	for (i = 0; i < sc_count; i++) {
	87	sc = bt_trace_class_borrow_stream_class_by_index_const(tc, i);
98b15851	88	BT_ASSERT_DBG(sc);
14f28187 FD	89
	90	cc = bt_stream_class_borrow_default_clock_class_const(sc);
	91	if (cc) {
	92	goto end;
	93	}
	94	}
	95	end:
98b15851	96	BT_ASSERT_DBG(cc);
14f28187	97	return cc;
7cdc2bab MD	98	}
	99
	100	BT_HIDDEN
14f28187	101	enum lttng_live_iterator_status lttng_live_metadata_update(
7cdc2bab MD	102	struct lttng_live_trace *trace)
	103	{
	104	struct lttng_live_session *session = trace->session;
7cdc2bab	105	struct lttng_live_metadata *metadata = trace->metadata;
7cdc2bab MD	106	size_t size, len_read = 0;
7cdc2bab MD	107	char *metadata_buf = NULL;
c28512ab	108	bool keep_receiving;
7cdc2bab MD	109	FILE *fp = NULL;
7cdc2bab MD	110	enum ctf_metadata_decoder_status decoder_status;
14f28187 FD	111	enum lttng_live_iterator_status status =
14f28187 FD	112	LTTNG_LIVE_ITERATOR_STATUS_OK;
c01594de	113	bt_logging_level log_level = trace->log_level;
2ece7dd0	114	bt_self_component *self_comp = trace->self_comp;
c28512ab	115	enum lttng_live_get_one_metadata_status metadata_status;
7cdc2bab	116
ecb4ba8a FD	117	BT_COMP_LOGD("Updating metadata for trace: trace-id=%"PRIu64, trace->id);
ecb4ba8a FD	118
7cdc2bab MD	119	/* No metadata stream yet. */
	120	if (!metadata) {
	121	if (session->new_streams_needed) {
14f28187	122	status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
7cdc2bab MD	123	} else {
7cdc2bab MD	124	session->new_streams_needed = true;
14f28187	125	status = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
7cdc2bab MD	126	}
	127	goto end;
	128	}
	129
76bbaebc	130	if (trace->metadata_stream_state != LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED) {
7cdc2bab MD	131	goto end;
	132	}
	133
f79c2d7a FD	134	/*
	135	* Open a new write only file handle to populate the `metadata_buf`
	136	* memory buffer so we can write in loop in it easily.
	137	*/
7cdc2bab MD	138	fp = bt_open_memstream(&metadata_buf, &size);
7cdc2bab MD	139	if (!fp) {
5b959469 FD	140	if (errno == EINTR &&
5b959469 FD	141	lttng_live_graph_is_canceled(session->lttng_live_msg_iter)) {
f79c2d7a	142	session->lttng_live_msg_iter->was_interrupted = true;
5b959469 FD	143	status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
	144	} else {
	145	BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp,
	146	"Metadata open_memstream", ".");
	147	status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
	148	}
	149	goto end;
7cdc2bab MD	150	}
7cdc2bab MD	151
c28512ab	152	keep_receiving = true;
7cdc2bab	153	/* Grab all available metadata. */
c28512ab FD	154	while (keep_receiving) {
c28512ab FD	155	size_t reply_len = 0;
7cdc2bab	156	/*
c28512ab FD	157	* lttng_live_get_one_metadata_packet() asks the Relay Daemon
	158	* for new metadata. If new metadata is received, the function
	159	* writes it to the provided file handle and updates the
	160	* reply_len output parameter. We call this function in loop
	161	* until it returns _END meaning that no new metadata is
	162	* available.
	163	* We may receive a _CLOSED status if the metadata stream we
	164	* are requesting is no longer available on the relay.
	165	* If we receive an _ERROR status, it means there was a
	166	* networking, allocating, or some other unrecoverable error.
7cdc2bab	167	*/
c28512ab FD	168	metadata_status = lttng_live_get_one_metadata_packet(trace, fp,
	169	&reply_len);
	170
	171	switch (metadata_status) {
	172	case LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK:
	173	len_read += reply_len;
	174	break;
	175	case LTTNG_LIVE_GET_ONE_METADATA_STATUS_END:
	176	keep_receiving = false;
	177	break;
	178	case LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED:
ecb4ba8a FD	179	BT_COMP_LOGD("Metadata stream was closed by the Relay, the trace is no longer active: "
	180	"trace-id=%"PRIu64", metadata-stream-id=%"PRIu64,
	181	trace->id, metadata->stream_id);
76bbaebc FD	182	/*
	183	* The stream was closed and we received everything
	184	* there was to receive for this metadata stream.
	185	* We go on with the decoding of what we received. So
	186	* that data stream can be decoded.
	187	*/
c28512ab	188	keep_receiving = false;
76bbaebc	189	trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_CLOSED;
c28512ab FD	190	break;
c28512ab FD	191	case LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR:
ecb4ba8a FD	192	BT_COMP_LOGE_APPEND_CAUSE(self_comp,
	193	"Error getting one trace metadata packet: "
	194	"trace-id=%"PRIu64, trace->id);
c28512ab FD	195	goto error;
c28512ab FD	196	default:
498e7994	197	bt_common_abort();
7cdc2bab	198	}
c28512ab	199	}
7cdc2bab	200
f79c2d7a	201	/* The memory buffer `metadata_buf` contains all the metadata. */
7cdc2bab	202	if (bt_close_memstream(&metadata_buf, &size, fp)) {
ecb4ba8a	203	BT_COMP_LOGW_ERRNO("Metadata bt_close_memstream", ".");
7cdc2bab	204	}
e7c34fd7	205
7cdc2bab MD	206	fp = NULL;
	207
	208	if (len_read == 0) {
	209	if (!trace->trace) {
14f28187	210	status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
7cdc2bab MD	211	goto end;
7cdc2bab MD	212	}
76bbaebc FD	213
	214	/* The relay sent zero bytes of metdata. */
	215	trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NOT_NEEDED;
7cdc2bab MD	216	goto end;
	217	}
	218
f79c2d7a FD	219	/*
	220	* Open a new reading file handle on the `metadata_buf` and pass it to
	221	* the metadata decoder.
	222	*/
7cdc2bab MD	223	fp = bt_fmemopen(metadata_buf, len_read, "rb");
7cdc2bab MD	224	if (!fp) {
5b959469 FD	225	if (errno == EINTR &&
5b959469 FD	226	lttng_live_graph_is_canceled(session->lttng_live_msg_iter)) {
f79c2d7a	227	session->lttng_live_msg_iter->was_interrupted = true;
5b959469 FD	228	status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
	229	} else {
	230	BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp,
	231	"Cannot memory-open metadata buffer", ".");
	232	status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
	233	}
	234	goto end;
7cdc2bab MD	235	}
7cdc2bab MD	236
14f28187	237	/*
06be9946 PP	238	* The call to ctf_metadata_decoder_append_content() will append
06be9946 PP	239	* new metadata to our current trace class.
14f28187	240	*/
ecb4ba8a	241	BT_COMP_LOGD("Appending new metadata to the ctf_trace class");
06be9946 PP	242	decoder_status = ctf_metadata_decoder_append_content(
06be9946 PP	243	metadata->decoder, fp);
7cdc2bab MD	244	switch (decoder_status) {
7cdc2bab MD	245	case CTF_METADATA_DECODER_STATUS_OK:
14f28187	246	if (!trace->trace_class) {
335a2da5 PP	247	struct ctf_trace_class *tc =
	248	ctf_metadata_decoder_borrow_ctf_trace_class(
	249	metadata->decoder);
	250
14f28187 FD	251	trace->trace_class =
	252	ctf_metadata_decoder_get_ir_trace_class(
	253	metadata->decoder);
	254	trace->trace = bt_trace_create(trace->trace_class);
335a2da5	255	if (!trace->trace) {
1419db2b FD	256	BT_COMP_LOGE_APPEND_CAUSE(self_comp,
1419db2b FD	257	"Failed to create bt_trace");
335a2da5 PP	258	goto error;
	259	}
	260	if (ctf_trace_class_configure_ir_trace(tc,
	261	trace->trace)) {
1419db2b FD	262	BT_COMP_LOGE_APPEND_CAUSE(self_comp,
1419db2b FD	263	"Failed to configure ctf trace class");
335a2da5 PP	264	goto error;
335a2da5 PP	265	}
14f28187	266	if (!stream_classes_all_have_default_clock_class(
2ece7dd0 PP	267	trace->trace_class, log_level,
2ece7dd0 PP	268	self_comp)) {
14f28187 FD	269	/* Error logged in function. */
	270	goto error;
	271	}
	272	trace->clock_class =
	273	borrow_any_clock_class(trace->trace_class);
7cdc2bab	274	}
76bbaebc FD	275
	276	/* The metadata was updated succesfully. */
	277	trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NOT_NEEDED;
14f28187	278
7cdc2bab MD	279	break;
7cdc2bab MD	280	case CTF_METADATA_DECODER_STATUS_INCOMPLETE:
14f28187	281	status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
7cdc2bab	282	break;
1a6da3f9	283	default:
7cdc2bab MD	284	goto error;
	285	}
	286
	287	goto end;
c28512ab	288
7cdc2bab	289	error:
5b959469	290	status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
7cdc2bab MD	291	end:
	292	if (fp) {
	293	int closeret;
	294
	295	closeret = fclose(fp);
	296	if (closeret) {
ecb4ba8a	297	BT_COMP_LOGW_ERRNO("Error on fclose", ".");
7cdc2bab MD	298	}
7cdc2bab MD	299	}
6f79a7cf	300	free(metadata_buf);
7cdc2bab MD	301	return status;
	302	}
	303
	304	BT_HIDDEN
	305	int lttng_live_metadata_create_stream(struct lttng_live_session *session,
2ece7dd0	306	uint64_t ctf_trace_id, uint64_t stream_id,
06994c71	307	const char *trace_name)
7cdc2bab	308	{
1419db2b FD	309	bt_self_component *self_comp = session->self_comp;
1419db2b FD	310	bt_logging_level log_level = session->log_level;
7cdc2bab MD	311	struct lttng_live_metadata *metadata = NULL;
7cdc2bab MD	312	struct lttng_live_trace *trace;
0746848c	313	struct ctf_metadata_decoder_config cfg = {
c01594de	314	.log_level = session->log_level,
2ece7dd0	315	.self_comp = session->self_comp,
0746848c PP	316	.clock_class_offset_s = 0,
0746848c PP	317	.clock_class_offset_ns = 0,
06be9946	318	.create_trace_class = true,
0746848c	319	};
7cdc2bab MD	320
	321	metadata = g_new0(struct lttng_live_metadata, 1);
	322	if (!metadata) {
	323	return -1;
	324	}
c01594de	325	metadata->log_level = session->log_level;
2ece7dd0	326	metadata->self_comp = session->self_comp;
7cdc2bab	327	metadata->stream_id = stream_id;
14f28187	328
f7b785ac	329	metadata->decoder = ctf_metadata_decoder_create(&cfg);
7cdc2bab	330	if (!metadata->decoder) {
1419db2b FD	331	BT_COMP_LOGE_APPEND_CAUSE(self_comp,
1419db2b FD	332	"Failed to create CTF metadata decoder");
7cdc2bab MD	333	goto error;
7cdc2bab MD	334	}
36e94ad6 FD	335	trace = lttng_live_session_borrow_or_create_trace_by_id(session,
36e94ad6 FD	336	ctf_trace_id);
7cdc2bab	337	if (!trace) {
1419db2b FD	338	BT_COMP_LOGE_APPEND_CAUSE(self_comp,
1419db2b FD	339	"Failed to borrow trace");
7cdc2bab MD	340	goto error;
7cdc2bab MD	341	}
7cdc2bab MD	342	trace->metadata = metadata;
	343	return 0;
	344
	345	error:
	346	ctf_metadata_decoder_destroy(metadata->decoder);
	347	g_free(metadata);
	348	return -1;
	349	}
	350
	351	BT_HIDDEN
	352	void lttng_live_metadata_fini(struct lttng_live_trace *trace)
	353	{
	354	struct lttng_live_metadata *metadata = trace->metadata;
	355
	356	if (!metadata) {
	357	return;
	358	}
7cdc2bab MD	359	ctf_metadata_decoder_destroy(metadata->decoder);
7cdc2bab MD	360	trace->metadata = NULL;
7cdc2bab MD	361	g_free(metadata);
7cdc2bab MD	362	}