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

/*
 * 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_LOG_TAG "PLUGIN-CTF-LTTNG-LIVE-SRC-METADATA"
#include "logging.h"

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdbool.h>
#include <glib.h>
#include <babeltrace/compat/uuid-internal.h>
#include <babeltrace/compat/memstream-internal.h>
#include <babeltrace/graph/graph.h>

#include "metadata.h"
#include "../common/metadata/decoder.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
enum bt_ctf_lttng_live_iterator_status lttng_live_update_clock_map(
		struct lttng_live_trace *trace)
{
	enum bt_ctf_lttng_live_iterator_status status =
			BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK;
	size_t i;
	int count, ret;

	BT_PUT(trace->cc_prio_map);
	trace->cc_prio_map = bt_clock_class_priority_map_create();
	if (!trace->cc_prio_map) {
		goto error;
	}

	count = bt_ctf_trace_get_clock_class_count(trace->trace);
	assert(count >= 0);

	for (i = 0; i < count; i++) {
		struct bt_ctf_clock_class *clock_class =
			bt_ctf_trace_get_clock_class_by_index(trace->trace, i);

		assert(clock_class);
		ret = bt_clock_class_priority_map_add_clock_class(
			trace->cc_prio_map, clock_class, 0);
		BT_PUT(clock_class);

		if (ret) {
			goto error;
		}
	}

	goto end;
error:
	status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR;
end:
	return status;
}

BT_HIDDEN
enum bt_ctf_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;
	ssize_t ret = 0;
	size_t size, len_read = 0;
	char *metadata_buf = NULL;
	FILE *fp = NULL;
	enum ctf_metadata_decoder_status decoder_status;
	enum bt_ctf_lttng_live_iterator_status status =
		BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK;

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

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

	/* Open for writing */
	fp = bt_open_memstream(&metadata_buf, &size);
	if (!fp) {
		BT_LOGE("Metadata open_memstream: %s", strerror(errno));
		goto error;
	}

	/* Grab all available metadata. */
	do {
		/*
		 * get_one_metadata_packet returns the number of bytes
		 * received, 0 when we have received everything, a
		 * negative value on error.
		 */
		ret = lttng_live_get_one_metadata_packet(trace, fp);
		if (ret > 0) {
			len_read += ret;
		}
	} while (ret > 0);

	/*
	 * Consider metadata closed as soon as we get an error reading
	 * it (e.g. cannot be found).
	 */
	if (ret < 0) {
		if (!metadata->closed) {
			metadata->closed = true;
			/*
			 * Release our reference on the trace as soon as
			 * we know the metadata stream is not available
			 * anymore. This won't necessarily teardown the
			 * metadata objects immediately, but only when
			 * the data streams are done.
			 */
			lttng_live_unref_trace(metadata->trace);
		}
		if (errno == EINTR) {
			if (bt_graph_is_canceled(session->lttng_live->graph)) {
				status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
				goto end;
			}
		}
	}

	if (bt_close_memstream(&metadata_buf, &size, fp)) {
		BT_LOGE("bt_close_memstream: %s", strerror(errno));
	}
	ret = 0;
	fp = NULL;

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

	if (babeltrace_debug) {
		// yydebug = 1;
	}

	fp = bt_fmemopen(metadata_buf, len_read, "rb");
	if (!fp) {
		BT_LOGE("Cannot memory-open metadata buffer: %s",
			strerror(errno));
		goto error;
	}

	decoder_status = ctf_metadata_decoder_decode(metadata->decoder, fp);
	switch (decoder_status) {
	case CTF_METADATA_DECODER_STATUS_OK:
		BT_PUT(trace->trace);
		trace->trace = ctf_metadata_decoder_get_trace(metadata->decoder);
		trace->new_metadata_needed = false;
		status = lttng_live_update_clock_map(trace);
		if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) {
			goto end;
		}
		break;
	case CTF_METADATA_DECODER_STATUS_INCOMPLETE:
		status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
		break;
	case CTF_METADATA_DECODER_STATUS_ERROR:
	case CTF_METADATA_DECODER_STATUS_INVAL_VERSION:
	case CTF_METADATA_DECODER_STATUS_IR_VISITOR_ERROR:
		goto error;
	}

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

		closeret = fclose(fp);
		if (closeret) {
			BT_LOGE("Error on fclose");
		}
	}
	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)
{
	struct lttng_live_metadata *metadata = NULL;
	struct lttng_live_trace *trace;
	const char *match;

	metadata = g_new0(struct lttng_live_metadata, 1);
	if (!metadata) {
		return -1;
	}
	metadata->stream_id = stream_id;
	//TODO: add clock offset option
	match = strstr(trace_name, session->session_name->str);
	if (!match) {
		goto error;
	}
	metadata->decoder = ctf_metadata_decoder_create(stderr, 0,
		match);
	if (!metadata->decoder) {
		goto error;
	}
	trace = lttng_live_ref_trace(session, ctf_trace_id);
	if (!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;
	}
	if (metadata->text) {
		free(metadata->text);
	}
	ctf_metadata_decoder_destroy(metadata->decoder);
	trace->metadata = NULL;
	lttng_live_unref_trace(trace);
	if (!metadata->closed) {
		lttng_live_unref_trace(metadata->trace);
	}
	g_free(metadata);
}
Commit	Line	Data
7cdc2bab MD	1	/*
	2	* Copyright 2016 - Philippe Proulx <pproulx@efficios.com>
	3	* Copyright 2010-2011 - EfficiOS Inc. and Linux Foundation
	4	*
	5	* Some functions are based on older functions written by Mathieu Desnoyers.
	6	*
	7	* Permission is hereby granted, free of charge, to any person obtaining a copy
	8	* of this software and associated documentation files (the "Software"), to deal
	9	* in the Software without restriction, including without limitation the rights
	10	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	11	* copies of the Software, and to permit persons to whom the Software is
	12	* furnished to do so, subject to the following conditions:
	13	*
	14	* The above copyright notice and this permission notice shall be included in
	15	* all copies or substantial portions of the Software.
	16	*
	17	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	18	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	19	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	20	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	21	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	22	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	23	* SOFTWARE.
	24	*/
	25
020bc26f PP	26	#define BT_LOG_TAG "PLUGIN-CTF-LTTNG-LIVE-SRC-METADATA"
	27	#include "logging.h"
	28
7cdc2bab MD	29	#include <stdio.h>
	30	#include <stdint.h>
	31	#include <stdlib.h>
	32	#include <stdbool.h>
	33	#include <glib.h>
	34	#include <babeltrace/compat/uuid-internal.h>
	35	#include <babeltrace/compat/memstream-internal.h>
4c66436f	36	#include <babeltrace/graph/graph.h>
7cdc2bab	37
7cdc2bab MD	38	#include "metadata.h"
	39	#include "../common/metadata/decoder.h"
	40
	41	#define TSDL_MAGIC 0x75d11d57
	42
	43	struct packet_header {
	44	uint32_t magic;
	45	uint8_t uuid[16];
	46	uint32_t checksum;
	47	uint32_t content_size;
	48	uint32_t packet_size;
	49	uint8_t compression_scheme;
	50	uint8_t encryption_scheme;
	51	uint8_t checksum_scheme;
	52	uint8_t major;
	53	uint8_t minor;
	54	} __attribute__((__packed__));
	55
	56	static
	57	enum bt_ctf_lttng_live_iterator_status lttng_live_update_clock_map(
	58	struct lttng_live_trace *trace)
	59	{
	60	enum bt_ctf_lttng_live_iterator_status status =
	61	BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK;
	62	size_t i;
	63	int count, ret;
	64
	65	BT_PUT(trace->cc_prio_map);
	66	trace->cc_prio_map = bt_clock_class_priority_map_create();
	67	if (!trace->cc_prio_map) {
	68	goto error;
	69	}
	70
	71	count = bt_ctf_trace_get_clock_class_count(trace->trace);
	72	assert(count >= 0);
	73
	74	for (i = 0; i < count; i++) {
	75	struct bt_ctf_clock_class *clock_class =
	76	bt_ctf_trace_get_clock_class_by_index(trace->trace, i);
	77
	78	assert(clock_class);
	79	ret = bt_clock_class_priority_map_add_clock_class(
	80	trace->cc_prio_map, clock_class, 0);
	81	BT_PUT(clock_class);
	82
	83	if (ret) {
	84	goto error;
	85	}
	86	}
	87
	88	goto end;
	89	error:
	90	status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR;
	91	end:
	92	return status;
	93	}
	94
	95	BT_HIDDEN
	96	enum bt_ctf_lttng_live_iterator_status lttng_live_metadata_update(
	97	struct lttng_live_trace *trace)
	98	{
	99	struct lttng_live_session *session = trace->session;
7cdc2bab MD	100	struct lttng_live_metadata *metadata = trace->metadata;
	101	ssize_t ret = 0;
	102	size_t size, len_read = 0;
	103	char *metadata_buf = NULL;
	104	FILE *fp = NULL;
	105	enum ctf_metadata_decoder_status decoder_status;
	106	enum bt_ctf_lttng_live_iterator_status status =
	107	BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK;
	108
	109	/* No metadata stream yet. */
	110	if (!metadata) {
	111	if (session->new_streams_needed) {
	112	status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
	113	} else {
	114	session->new_streams_needed = true;
	115	status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
	116	}
	117	goto end;
	118	}
	119
	120	if (!trace->new_metadata_needed) {
	121	goto end;
	122	}
	123
	124	/* Open for writing */
	125	fp = bt_open_memstream(&metadata_buf, &size);
	126	if (!fp) {
087bc060	127	BT_LOGE("Metadata open_memstream: %s", strerror(errno));
7cdc2bab MD	128	goto error;
	129	}
	130
	131	/* Grab all available metadata. */
	132	do {
	133	/*
	134	* get_one_metadata_packet returns the number of bytes
	135	* received, 0 when we have received everything, a
	136	* negative value on error.
	137	*/
	138	ret = lttng_live_get_one_metadata_packet(trace, fp);
	139	if (ret > 0) {
	140	len_read += ret;
	141	}
	142	} while (ret > 0);
	143
	144	/*
	145	* Consider metadata closed as soon as we get an error reading
	146	* it (e.g. cannot be found).
	147	*/
	148	if (ret < 0) {
	149	if (!metadata->closed) {
	150	metadata->closed = true;
	151	/*
	152	* Release our reference on the trace as soon as
	153	* we know the metadata stream is not available
	154	* anymore. This won't necessarily teardown the
	155	* metadata objects immediately, but only when
	156	* the data streams are done.
	157	*/
	158	lttng_live_unref_trace(metadata->trace);
	159	}
4c66436f MD	160	if (errno == EINTR) {
	161	if (bt_graph_is_canceled(session->lttng_live->graph)) {
	162	status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
	163	goto end;
	164	}
	165	}
7cdc2bab MD	166	}
	167
	168	if (bt_close_memstream(&metadata_buf, &size, fp)) {
	169	BT_LOGE("bt_close_memstream: %s", strerror(errno));
	170	}
	171	ret = 0;
	172	fp = NULL;
	173
	174	if (len_read == 0) {
	175	if (!trace->trace) {
	176	status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
	177	goto end;
	178	}
	179	trace->new_metadata_needed = false;
	180	goto end;
	181	}
	182
	183	if (babeltrace_debug) {
	184	// yydebug = 1;
	185	}
	186
	187	fp = bt_fmemopen(metadata_buf, len_read, "rb");
	188	if (!fp) {
087bc060	189	BT_LOGE("Cannot memory-open metadata buffer: %s",
7cdc2bab MD	190	strerror(errno));
	191	goto error;
	192	}
	193
	194	decoder_status = ctf_metadata_decoder_decode(metadata->decoder, fp);
	195	switch (decoder_status) {
	196	case CTF_METADATA_DECODER_STATUS_OK:
	197	BT_PUT(trace->trace);
	198	trace->trace = ctf_metadata_decoder_get_trace(metadata->decoder);
	199	trace->new_metadata_needed = false;
	200	status = lttng_live_update_clock_map(trace);
	201	if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) {
	202	goto end;
	203	}
	204	break;
	205	case CTF_METADATA_DECODER_STATUS_INCOMPLETE:
	206	status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
	207	break;
	208	case CTF_METADATA_DECODER_STATUS_ERROR:
	209	case CTF_METADATA_DECODER_STATUS_INVAL_VERSION:
	210	case CTF_METADATA_DECODER_STATUS_IR_VISITOR_ERROR:
	211	goto error;
	212	}
	213
	214	goto end;
	215	error:
	216	status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR;
	217	end:
	218	if (fp) {
	219	int closeret;
	220
	221	closeret = fclose(fp);
	222	if (closeret) {
087bc060	223	BT_LOGE("Error on fclose");
7cdc2bab MD	224	}
	225	}
	226	return status;
	227	}
	228
	229	BT_HIDDEN
	230	int lttng_live_metadata_create_stream(struct lttng_live_session *session,
	231	uint64_t ctf_trace_id,
06994c71 MD	232	uint64_t stream_id,
06994c71 MD	233	const char *trace_name)
7cdc2bab MD	234	{
	235	struct lttng_live_metadata *metadata = NULL;
	236	struct lttng_live_trace *trace;
06994c71	237	const char *match;
7cdc2bab MD	238
	239	metadata = g_new0(struct lttng_live_metadata, 1);
	240	if (!metadata) {
	241	return -1;
	242	}
	243	metadata->stream_id = stream_id;
	244	//TODO: add clock offset option
06994c71 MD	245	match = strstr(trace_name, session->session_name->str);
	246	if (!match) {
	247	goto error;
	248	}
1a9f7075	249	metadata->decoder = ctf_metadata_decoder_create(stderr, 0,
06994c71	250	match);
7cdc2bab MD	251	if (!metadata->decoder) {
	252	goto error;
	253	}
	254	trace = lttng_live_ref_trace(session, ctf_trace_id);
	255	if (!trace) {
	256	goto error;
	257	}
	258	metadata->trace = trace;
	259	trace->metadata = metadata;
	260	return 0;
	261
	262	error:
	263	ctf_metadata_decoder_destroy(metadata->decoder);
	264	g_free(metadata);
	265	return -1;
	266	}
	267
	268	BT_HIDDEN
	269	void lttng_live_metadata_fini(struct lttng_live_trace *trace)
	270	{
	271	struct lttng_live_metadata *metadata = trace->metadata;
	272
	273	if (!metadata) {
	274	return;
	275	}
	276	if (metadata->text) {
	277	free(metadata->text);
	278	}
	279	ctf_metadata_decoder_destroy(metadata->decoder);
	280	trace->metadata = NULL;
	281	lttng_live_unref_trace(trace);
	282	if (!metadata->closed) {
	283	lttng_live_unref_trace(metadata->trace);
	284	}
	285	g_free(metadata);
	286	}