[babeltrace.git] / plugins / ctf / fs / data-stream.c

/*
 * Copyright 2016 - Philippe Proulx <pproulx@efficios.com>
 * Copyright 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
 * Copyright 2010-2011 - EfficiOS Inc. and Linux Foundation
 *
 * 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.
 */

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdbool.h>
#include <glib.h>
#include <inttypes.h>
#include <sys/mman.h>
#include <babeltrace/ctf-ir/stream.h>
#include <babeltrace/plugin/notification/iterator.h>
#include "file.h"
#include "metadata.h"
#include "../common/notif-iter/notif-iter.h"
#include <assert.h>
#include "data-stream.h"

#define PRINT_ERR_STREAM	ctf_fs->error_fp
#define PRINT_PREFIX		"ctf-fs-data-stream"
#include "print.h"

static
size_t remaining_mmap_bytes(struct ctf_fs_stream *stream)
{
	return stream->mmap_valid_len - stream->request_offset;
}

static
int stream_munmap(struct ctf_fs_stream *stream)
{
	int ret = 0;
	struct ctf_fs_component *ctf_fs = stream->file->ctf_fs;

	if (munmap(stream->mmap_addr, stream->mmap_len)) {
		PERR("Cannot memory-unmap address %p (size %zu) of file \"%s\" (%p): %s\n",
			stream->mmap_addr, stream->mmap_len,
			stream->file->path->str, stream->file->fp,
			strerror(errno));
		ret = -1;
		goto end;
	}
end:
	return ret;
}

static
int mmap_next(struct ctf_fs_stream *stream)
{
	int ret = 0;
	struct ctf_fs_component *ctf_fs = stream->file->ctf_fs;

	/* Unmap old region */
	if (stream->mmap_addr) {
		if (stream_munmap(stream)) {
			goto error;
		}

		stream->mmap_offset += stream->mmap_valid_len;
		stream->request_offset = 0;
	}

	stream->mmap_valid_len = MIN(stream->file->size - stream->mmap_offset,
			stream->mmap_max_len);
	/* Round up to next page, assuming page size being a power of 2. */
	stream->mmap_len = (stream->mmap_valid_len + ctf_fs->page_size - 1)
			& ~(ctf_fs->page_size - 1);
	/* Map new region */
	stream->mmap_addr = mmap((void *) 0, stream->mmap_len,
			PROT_READ, MAP_PRIVATE, fileno(stream->file->fp),
			stream->mmap_offset);
	if (stream->mmap_addr == MAP_FAILED) {
		PERR("Cannot memory-map address (size %zu) of file \"%s\" (%p) at offset %zu: %s\n",
				stream->mmap_len, stream->file->path->str,
				stream->file->fp, stream->mmap_offset,
				strerror(errno));
		goto error;
	}

	goto end;
error:
	stream_munmap(stream);
	ret = -1;
end:
	return ret;
}

static
enum bt_ctf_notif_iter_medium_status medop_request_bytes(
		size_t request_sz, uint8_t **buffer_addr,
		size_t *buffer_sz, void *data)
{
	enum bt_ctf_notif_iter_medium_status status =
		BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK;
	struct ctf_fs_stream *stream = data;
	struct ctf_fs_component *ctf_fs = stream->file->ctf_fs;

	if (request_sz == 0) {
		goto end;
	}

	/* Check if we have at least one memory-mapped byte left */
	if (remaining_mmap_bytes(stream) == 0) {
		/* Are we at the end of the file? */
		if (stream->request_offset >= stream->file->size) {
			PDBG("Reached end of file \"%s\" (%p)\n",
				stream->file->path->str, stream->file->fp);
			status = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF;
			goto end;
		}

		if (mmap_next(stream)) {
			PERR("Cannot memory-map next region of file \"%s\" (%p)\n",
				stream->file->path->str, stream->file->fp);
			goto error;
		}
	}

	*buffer_sz = MIN(remaining_mmap_bytes(stream), request_sz);
	*buffer_addr = ((uint8_t *) stream->mmap_addr) + stream->request_offset;
	stream->request_offset += *buffer_sz;
	goto end;

error:
	status = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_ERROR;

end:
	return status;
}

static
struct bt_ctf_stream *medop_get_stream(
		struct bt_ctf_stream_class *stream_class, void *data)
{
	struct ctf_fs_stream *fs_stream = data;
	struct ctf_fs_component *ctf_fs = fs_stream->file->ctf_fs;

	if (!fs_stream->stream) {
		int64_t id = bt_ctf_stream_class_get_id(stream_class);

		PDBG("Creating stream out of stream class %" PRId64 "\n", id);
		fs_stream->stream = bt_ctf_stream_create(stream_class,
				fs_stream->file->path->str);
		if (!fs_stream->stream) {
			PERR("Cannot create stream (stream class %" PRId64 ")\n",
					id);
		}
	}

	return fs_stream->stream;
}

static struct bt_ctf_notif_iter_medium_ops medops = {
	.request_bytes = medop_request_bytes,
	.get_stream = medop_get_stream,
};

static
int build_index_from_idx_file(struct ctf_fs_stream *stream)
{
	int ret = 0;
	gchar *directory = NULL;
	gchar *basename = NULL;
	GString *index_basename = NULL;
	gchar *index_file_path = NULL;
	GMappedFile *mapped_file = NULL;
	gsize filesize;
	const struct ctf_packet_index_file_hdr *header;
	const char *mmap_begin, *file_pos;
	struct index_entry *index;
	uint64_t total_packets_size = 0;
	size_t file_index_entry_size;
	size_t file_entry_count;
	size_t i;

	/* Look for index file in relative path index/name.idx. */
	basename = g_path_get_basename(stream->file->path->str);
	if (!basename) {
		ret = -1;
		goto end;
	}

	directory = g_path_get_dirname(stream->file->path->str);
	if (!directory) {
		ret = -1;
		goto end;
	}

	index_basename = g_string_new(basename);
	if (!index_basename) {
		ret = -1;
		goto end;
	}

	g_string_append(index_basename, ".idx");
	index_file_path = g_build_filename(directory, "index",
			index_basename->str, NULL);
	mapped_file = g_mapped_file_new(index_file_path, FALSE, NULL);
	filesize = g_mapped_file_get_length(mapped_file);
	if (filesize < sizeof(*header)) {
		printf_error("Invalid LTTng trace index: file size < header size");
		ret = -1;
		goto end;
	}

	mmap_begin = g_mapped_file_get_contents(mapped_file);
	header = (struct ctf_packet_index_file_hdr *) mmap_begin;

	file_pos = g_mapped_file_get_contents(mapped_file) + sizeof(*header);
	if (be32toh(header->magic) != CTF_INDEX_MAGIC) {
		printf_error("Invalid LTTng trace index: \"magic\" validation failed");
		ret = -1;
		goto end;
	}

	file_index_entry_size = be32toh(header->packet_index_len);
	file_entry_count = (filesize - sizeof(*header)) / file_index_entry_size;
	if ((filesize - sizeof(*header)) % (file_entry_count * file_index_entry_size)) {
		printf_error("Invalid index file size; not a multiple of index entry size");
		ret = -1;
		goto end;
	}

	stream->index.entries = g_array_sized_new(FALSE, TRUE,
			sizeof(struct index_entry), file_entry_count);
	if (!stream->index.entries) {
		ret = -1;
		goto end;
	}
	index = (struct index_entry *) stream->index.entries->data;
	for (i = 0; i < file_entry_count; i++) {
		struct ctf_packet_index *file_index =
				(struct ctf_packet_index *) file_pos;
		uint64_t packet_size = be64toh(file_index->packet_size);

		if (packet_size % CHAR_BIT) {
			ret = -1;
			printf_error("Invalid packet size encountered in index file");
			goto invalid_index;
		}

		/* Convert size in bits to bytes. */
		packet_size /= CHAR_BIT;
		index->packet_size = packet_size;

		index->offset = be64toh(file_index->offset);
		if (i != 0 && index->offset < (index - 1)->offset) {
			printf_error("Invalid, non-monotonic, packet offset encountered in index file");
			ret = -1;
			goto invalid_index;
		}

		index->timestamp_begin = be64toh(file_index->timestamp_begin);
		index->timestamp_end = be64toh(file_index->timestamp_end);
		if (index->timestamp_end < index->timestamp_begin) {
			printf_error("Invalid packet time bounds encountered in index file");
			ret = -1;
			goto invalid_index;
		}

		total_packets_size += packet_size;
		file_pos += file_index_entry_size;
		index++;
	}

	/* Validate that the index addresses the complete stream. */
	if (stream->file->size != total_packets_size) {
		printf_error("Invalid index; indexed size != stream file size");
		ret = -1;
		goto invalid_index;
	}
end:
	g_free(directory);
	g_free(basename);
	g_free(index_file_path);
	g_string_free(index_basename, TRUE);
	g_mapped_file_unref(mapped_file);
	return ret;
invalid_index:
	g_array_free(stream->index.entries, TRUE);
	goto end;
}

static
int build_index_from_stream(struct ctf_fs_stream *stream)
{
	int ret = 0;
end:
	return ret;
}

static
int init_stream_index(struct ctf_fs_stream *stream)
{
	int ret;

	ret = build_index_from_idx_file(stream);
	if (!ret) {
		goto end;
	}

	ret = build_index_from_stream(stream);
end:
	return ret;
}

BT_HIDDEN
struct ctf_fs_stream *ctf_fs_stream_create(
		struct ctf_fs_component *ctf_fs, struct ctf_fs_file *file)
{
	int ret;
	struct ctf_fs_stream *stream = g_new0(struct ctf_fs_stream, 1);

	if (!stream) {
		goto error;
	}

	stream->file = file;
	stream->notif_iter = bt_ctf_notif_iter_create(ctf_fs->metadata->trace,
			ctf_fs->page_size, medops, stream, ctf_fs->error_fp);
	if (!stream->notif_iter) {
		goto error;
	}

	stream->mmap_max_len = ctf_fs->page_size * 2048;
	ret = init_stream_index(stream);
	if (ret) {
		goto error;
	}
	goto end;
error:
	/* Do not touch "borrowed" file. */
	stream->file = NULL;
	ctf_fs_stream_destroy(stream);
	stream = NULL;
end:
	return stream;
}

BT_HIDDEN
void ctf_fs_stream_destroy(struct ctf_fs_stream *stream)
{
	if (!stream) {
		return;
	}

	if (stream->file) {
		ctf_fs_file_destroy(stream->file);
	}

	if (stream->stream) {
		BT_PUT(stream->stream);
	}

	if (stream->notif_iter) {
		bt_ctf_notif_iter_destroy(stream->notif_iter);
	}

	if (stream->index.entries) {
		g_array_free(stream->index.entries, TRUE);
	}

	g_free(stream);
}
Commit	Line	Data
e98a2d6e PP	1	/*
e98a2d6e PP	2	* Copyright 2016 - Philippe Proulx <pproulx@efficios.com>
fc9a526c	3	* Copyright 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
e98a2d6e PP	4	* Copyright 2010-2011 - EfficiOS Inc. and Linux Foundation
e98a2d6e PP	5	*
e98a2d6e PP	6	* Permission is hereby granted, free of charge, to any person obtaining a copy
	7	* of this software and associated documentation files (the "Software"), to deal
	8	* in the Software without restriction, including without limitation the rights
	9	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	10	* copies of the Software, and to permit persons to whom the Software is
	11	* furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	19	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	21	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	22	* SOFTWARE.
	23	*/
	24
	25	#include <stdio.h>
	26	#include <stdint.h>
	27	#include <stdlib.h>
	28	#include <stdbool.h>
	29	#include <glib.h>
	30	#include <inttypes.h>
	31	#include <sys/mman.h>
	32	#include <babeltrace/ctf-ir/stream.h>
78586d8a JG	33	#include <babeltrace/plugin/notification/iterator.h>
	34	#include "file.h"
	35	#include "metadata.h"
	36	#include "../common/notif-iter/notif-iter.h"
	37	#include <assert.h>
5b29e799	38	#include "data-stream.h"
e98a2d6e PP	39
	40	#define PRINT_ERR_STREAM ctf_fs->error_fp
	41	#define PRINT_PREFIX "ctf-fs-data-stream"
	42	#include "print.h"
	43
5b29e799 JG	44	static
5b29e799 JG	45	size_t remaining_mmap_bytes(struct ctf_fs_stream *stream)
e98a2d6e	46	{
fc9a526c	47	return stream->mmap_valid_len - stream->request_offset;
e98a2d6e PP	48	}
e98a2d6e PP	49
5b29e799 JG	50	static
5b29e799 JG	51	int stream_munmap(struct ctf_fs_stream *stream)
e98a2d6e	52	{
fc9a526c	53	int ret = 0;
56a1cced	54	struct ctf_fs_component *ctf_fs = stream->file->ctf_fs;
e98a2d6e PP	55
	56	if (munmap(stream->mmap_addr, stream->mmap_len)) {
	57	PERR("Cannot memory-unmap address %p (size %zu) of file \"%s\" (%p): %s\n",
	58	stream->mmap_addr, stream->mmap_len,
	59	stream->file->path->str, stream->file->fp,
	60	strerror(errno));
fc9a526c JG	61	ret = -1;
fc9a526c JG	62	goto end;
e98a2d6e	63	}
fc9a526c JG	64	end:
fc9a526c JG	65	return ret;
e98a2d6e PP	66	}
e98a2d6e PP	67
5b29e799 JG	68	static
5b29e799 JG	69	int mmap_next(struct ctf_fs_stream *stream)
e98a2d6e	70	{
e98a2d6e	71	int ret = 0;
fc9a526c	72	struct ctf_fs_component *ctf_fs = stream->file->ctf_fs;
e98a2d6e PP	73
	74	/* Unmap old region */
	75	if (stream->mmap_addr) {
	76	if (stream_munmap(stream)) {
	77	goto error;
	78	}
	79
fc9a526c JG	80	stream->mmap_offset += stream->mmap_valid_len;
fc9a526c JG	81	stream->request_offset = 0;
e98a2d6e PP	82	}
e98a2d6e PP	83
fc9a526c JG	84	stream->mmap_valid_len = MIN(stream->file->size - stream->mmap_offset,
	85	stream->mmap_max_len);
	86	/* Round up to next page, assuming page size being a power of 2. */
	87	stream->mmap_len = (stream->mmap_valid_len + ctf_fs->page_size - 1)
	88	& ~(ctf_fs->page_size - 1);
e98a2d6e PP	89	/* Map new region */
e98a2d6e PP	90	stream->mmap_addr = mmap((void *) 0, stream->mmap_len,
78586d8a JG	91	PROT_READ, MAP_PRIVATE, fileno(stream->file->fp),
78586d8a JG	92	stream->mmap_offset);
e98a2d6e PP	93	if (stream->mmap_addr == MAP_FAILED) {
e98a2d6e PP	94	PERR("Cannot memory-map address (size %zu) of file \"%s\" (%p) at offset %zu: %s\n",
78586d8a JG	95	stream->mmap_len, stream->file->path->str,
	96	stream->file->fp, stream->mmap_offset,
	97	strerror(errno));
e98a2d6e PP	98	goto error;
	99	}
	100
	101	goto end;
e98a2d6e PP	102	error:
	103	stream_munmap(stream);
	104	ret = -1;
e98a2d6e PP	105	end:
	106	return ret;
	107	}
	108
5b29e799 JG	109	static
5b29e799 JG	110	enum bt_ctf_notif_iter_medium_status medop_request_bytes(
e98a2d6e PP	111	size_t request_sz, uint8_t **buffer_addr,
	112	size_t buffer_sz, void data)
	113	{
	114	enum bt_ctf_notif_iter_medium_status status =
	115	BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK;
	116	struct ctf_fs_stream *stream = data;
56a1cced	117	struct ctf_fs_component *ctf_fs = stream->file->ctf_fs;
e98a2d6e PP	118
	119	if (request_sz == 0) {
	120	goto end;
	121	}
	122
e98a2d6e PP	123	/* Check if we have at least one memory-mapped byte left */
	124	if (remaining_mmap_bytes(stream) == 0) {
	125	/* Are we at the end of the file? */
fc9a526c	126	if (stream->request_offset >= stream->file->size) {
e98a2d6e PP	127	PDBG("Reached end of file \"%s\" (%p)\n",
	128	stream->file->path->str, stream->file->fp);
	129	status = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF;
	130	goto end;
	131	}
	132
	133	if (mmap_next(stream)) {
	134	PERR("Cannot memory-map next region of file \"%s\" (%p)\n",
	135	stream->file->path->str, stream->file->fp);
	136	goto error;
	137	}
	138	}
	139
	140	*buffer_sz = MIN(remaining_mmap_bytes(stream), request_sz);
fc9a526c	141	buffer_addr = ((uint8_t ) stream->mmap_addr) + stream->request_offset;
e98a2d6e PP	142	stream->request_offset += *buffer_sz;
	143	goto end;
	144
	145	error:
	146	status = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_ERROR;
	147
	148	end:
	149	return status;
	150	}
	151
5b29e799 JG	152	static
5b29e799 JG	153	struct bt_ctf_stream *medop_get_stream(
e98a2d6e PP	154	struct bt_ctf_stream_class stream_class, void data)
	155	{
	156	struct ctf_fs_stream *fs_stream = data;
56a1cced	157	struct ctf_fs_component *ctf_fs = fs_stream->file->ctf_fs;
e98a2d6e PP	158
	159	if (!fs_stream->stream) {
	160	int64_t id = bt_ctf_stream_class_get_id(stream_class);
	161
	162	PDBG("Creating stream out of stream class %" PRId64 "\n", id);
	163	fs_stream->stream = bt_ctf_stream_create(stream_class,
fc9a526c	164	fs_stream->file->path->str);
e98a2d6e PP	165	if (!fs_stream->stream) {
e98a2d6e PP	166	PERR("Cannot create stream (stream class %" PRId64 ")\n",
fc9a526c	167	id);
e98a2d6e PP	168	}
	169	}
	170
	171	return fs_stream->stream;
	172	}
	173
	174	static struct bt_ctf_notif_iter_medium_ops medops = {
	175	.request_bytes = medop_request_bytes,
	176	.get_stream = medop_get_stream,
	177	};
	178
b6c3dcb2 JG	179	static
	180	int build_index_from_idx_file(struct ctf_fs_stream *stream)
	181	{
	182	int ret = 0;
	183	gchar *directory = NULL;
	184	gchar *basename = NULL;
	185	GString *index_basename = NULL;
	186	gchar *index_file_path = NULL;
	187	GMappedFile *mapped_file = NULL;
	188	gsize filesize;
	189	const struct ctf_packet_index_file_hdr *header;
	190	const char mmap_begin, file_pos;
	191	struct index_entry *index;
	192	uint64_t total_packets_size = 0;
	193	size_t file_index_entry_size;
	194	size_t file_entry_count;
	195	size_t i;
	196
	197	/* Look for index file in relative path index/name.idx. */
	198	basename = g_path_get_basename(stream->file->path->str);
	199	if (!basename) {
	200	ret = -1;
	201	goto end;
	202	}
	203
	204	directory = g_path_get_dirname(stream->file->path->str);
	205	if (!directory) {
	206	ret = -1;
	207	goto end;
	208	}
	209
	210	index_basename = g_string_new(basename);
	211	if (!index_basename) {
	212	ret = -1;
	213	goto end;
	214	}
	215
	216	g_string_append(index_basename, ".idx");
	217	index_file_path = g_build_filename(directory, "index",
	218	index_basename->str, NULL);
	219	mapped_file = g_mapped_file_new(index_file_path, FALSE, NULL);
	220	filesize = g_mapped_file_get_length(mapped_file);
	221	if (filesize < sizeof(*header)) {
	222	printf_error("Invalid LTTng trace index: file size < header size");
	223	ret = -1;
	224	goto end;
	225	}
	226
	227	mmap_begin = g_mapped_file_get_contents(mapped_file);
	228	header = (struct ctf_packet_index_file_hdr *) mmap_begin;
	229
	230	file_pos = g_mapped_file_get_contents(mapped_file) + sizeof(*header);
	231	if (be32toh(header->magic) != CTF_INDEX_MAGIC) {
	232	printf_error("Invalid LTTng trace index: \"magic\" validation failed");
	233	ret = -1;
	234	goto end;
	235	}
b6c3dcb2 JG	236
	237	file_index_entry_size = be32toh(header->packet_index_len);
	238	file_entry_count = (filesize - sizeof(*header)) / file_index_entry_size;
	239	if ((filesize - sizeof(header)) % (file_entry_count file_index_entry_size)) {
	240	printf_error("Invalid index file size; not a multiple of index entry size");
	241	ret = -1;
	242	goto end;
	243	}
	244
	245	stream->index.entries = g_array_sized_new(FALSE, TRUE,
	246	sizeof(struct index_entry), file_entry_count);
	247	if (!stream->index.entries) {
	248	ret = -1;
	249	goto end;
	250	}
	251	index = (struct index_entry *) stream->index.entries->data;
	252	for (i = 0; i < file_entry_count; i++) {
	253	struct ctf_packet_index *file_index =
	254	(struct ctf_packet_index *) file_pos;
	255	uint64_t packet_size = be64toh(file_index->packet_size);
	256
	257	if (packet_size % CHAR_BIT) {
	258	ret = -1;
	259	printf_error("Invalid packet size encountered in index file");
	260	goto invalid_index;
	261	}
	262
	263	/* Convert size in bits to bytes. */
	264	packet_size /= CHAR_BIT;
	265	index->packet_size = packet_size;
	266
	267	index->offset = be64toh(file_index->offset);
	268	if (i != 0 && index->offset < (index - 1)->offset) {
	269	printf_error("Invalid, non-monotonic, packet offset encountered in index file");
	270	ret = -1;
	271	goto invalid_index;
	272	}
	273
	274	index->timestamp_begin = be64toh(file_index->timestamp_begin);
	275	index->timestamp_end = be64toh(file_index->timestamp_end);
	276	if (index->timestamp_end < index->timestamp_begin) {
	277	printf_error("Invalid packet time bounds encountered in index file");
	278	ret = -1;
	279	goto invalid_index;
	280	}
	281
	282	total_packets_size += packet_size;
	283	file_pos += file_index_entry_size;
	284	index++;
	285	}
	286
	287	/* Validate that the index addresses the complete stream. */
	288	if (stream->file->size != total_packets_size) {
	289	printf_error("Invalid index; indexed size != stream file size");
	290	ret = -1;
	291	goto invalid_index;
	292	}
	293	end:
	294	g_free(directory);
	295	g_free(basename);
	296	g_free(index_file_path);
	297	g_string_free(index_basename, TRUE);
	298	g_mapped_file_unref(mapped_file);
	299	return ret;
300	invalid_index:
301	g_array_free(stream->index.entries, TRUE);
302	goto end;
303	}
304
305	static
306	int build_index_from_stream(struct ctf_fs_stream *stream)
307	{
308	int ret = 0;
309	end:
310	return ret;
311	}
312
313	static
314	int init_stream_index(struct ctf_fs_stream *stream)
315	{
316	int ret;
317
318	ret = build_index_from_idx_file(stream);
319	if (!ret) {
320	goto end;
321	}
322
323	ret = build_index_from_stream(stream);
324	end:
325	return ret;
326	}
327
e7a4393b JG	328	BT_HIDDEN
e7a4393b JG	329	struct ctf_fs_stream *ctf_fs_stream_create(
56a1cced	330	struct ctf_fs_component ctf_fs, struct ctf_fs_file file)
e98a2d6e	331	{
b6c3dcb2	332	int ret;
e98a2d6e PP	333	struct ctf_fs_stream *stream = g_new0(struct ctf_fs_stream, 1);
	334
	335	if (!stream) {
	336	goto error;
	337	}
	338
	339	stream->file = file;
5b29e799	340	stream->notif_iter = bt_ctf_notif_iter_create(ctf_fs->metadata->trace,
e7a4393b	341	ctf_fs->page_size, medops, stream, ctf_fs->error_fp);
e98a2d6e PP	342	if (!stream->notif_iter) {
	343	goto error;
	344	}
5b29e799	345
fc9a526c	346	stream->mmap_max_len = ctf_fs->page_size * 2048;
b6c3dcb2 JG	347	ret = init_stream_index(stream);
	348	if (ret) {
	349	goto error;
	350	}
e98a2d6e	351	goto end;
e98a2d6e	352	error:
78586d8a	353	/* Do not touch "borrowed" file. */
e98a2d6e PP	354	stream->file = NULL;
	355	ctf_fs_stream_destroy(stream);
	356	stream = NULL;
e98a2d6e PP	357	end:
	358	return stream;
	359	}
	360
5b29e799 JG	361	BT_HIDDEN
5b29e799 JG	362	void ctf_fs_stream_destroy(struct ctf_fs_stream *stream)
e98a2d6e	363	{
5b29e799 JG	364	if (!stream) {
5b29e799 JG	365	return;
043e2020 JG	366	}
043e2020 JG	367
5b29e799 JG	368	if (stream->file) {
5b29e799 JG	369	ctf_fs_file_destroy(stream->file);
e98a2d6e PP	370	}
e98a2d6e PP	371
5b29e799 JG	372	if (stream->stream) {
5b29e799 JG	373	BT_PUT(stream->stream);
043e2020	374	}
5b29e799 JG	375
	376	if (stream->notif_iter) {
	377	bt_ctf_notif_iter_destroy(stream->notif_iter);
78586d8a	378	}
5b29e799	379
b6c3dcb2 JG	380	if (stream->index.entries) {
	381	g_array_free(stream->index.entries, TRUE);
	382	}
	383
5b29e799	384	g_free(stream);
e98a2d6e	385	}