[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/graph/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
enum bt_ctf_notif_iter_medium_status mmap_next(struct ctf_fs_stream *stream)
{
	enum bt_ctf_notif_iter_medium_status ret =
			BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK;
	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);
	if (stream->mmap_valid_len == 0) {
		ret = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF;
		goto end;
	}
	/* 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 */
	assert(stream->mmap_len);
	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 = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_ERROR;
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->mmap_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;
		}

		status = mmap_next(stream);
		switch (status) {
		case BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK:
			break;
		case BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF:
			goto end;
		default:
			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);
	if (!mapped_file) {
		ret = -1;
		goto end;
	}
	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);
	if (index_basename) {
		g_string_free(index_basename, TRUE);
	}
	if (mapped_file) {
		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>
b2e0c907	33	#include <babeltrace/graph/notification-iterator.h>
78586d8a JG	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	68	static
e0f6a64a	69	enum bt_ctf_notif_iter_medium_status mmap_next(struct ctf_fs_stream *stream)
e98a2d6e	70	{
e0f6a64a JG	71	enum bt_ctf_notif_iter_medium_status ret =
e0f6a64a JG	72	BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK;
fc9a526c	73	struct ctf_fs_component *ctf_fs = stream->file->ctf_fs;
e98a2d6e PP	74
	75	/* Unmap old region */
	76	if (stream->mmap_addr) {
	77	if (stream_munmap(stream)) {
	78	goto error;
	79	}
	80
fc9a526c JG	81	stream->mmap_offset += stream->mmap_valid_len;
fc9a526c JG	82	stream->request_offset = 0;
e98a2d6e PP	83	}
e98a2d6e PP	84
fc9a526c JG	85	stream->mmap_valid_len = MIN(stream->file->size - stream->mmap_offset,
fc9a526c JG	86	stream->mmap_max_len);
e0f6a64a JG	87	if (stream->mmap_valid_len == 0) {
	88	ret = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF;
	89	goto end;
	90	}
fc9a526c JG	91	/* Round up to next page, assuming page size being a power of 2. */
	92	stream->mmap_len = (stream->mmap_valid_len + ctf_fs->page_size - 1)
	93	& ~(ctf_fs->page_size - 1);
e98a2d6e	94	/* Map new region */
e0f6a64a	95	assert(stream->mmap_len);
e98a2d6e	96	stream->mmap_addr = mmap((void *) 0, stream->mmap_len,
78586d8a JG	97	PROT_READ, MAP_PRIVATE, fileno(stream->file->fp),
78586d8a JG	98	stream->mmap_offset);
e98a2d6e PP	99	if (stream->mmap_addr == MAP_FAILED) {
e98a2d6e PP	100	PERR("Cannot memory-map address (size %zu) of file \"%s\" (%p) at offset %zu: %s\n",
78586d8a JG	101	stream->mmap_len, stream->file->path->str,
	102	stream->file->fp, stream->mmap_offset,
	103	strerror(errno));
e98a2d6e PP	104	goto error;
	105	}
	106
	107	goto end;
e98a2d6e PP	108	error:
e98a2d6e PP	109	stream_munmap(stream);
e0f6a64a	110	ret = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_ERROR;
e98a2d6e PP	111	end:
	112	return ret;
	113	}
	114
5b29e799 JG	115	static
5b29e799 JG	116	enum bt_ctf_notif_iter_medium_status medop_request_bytes(
e98a2d6e PP	117	size_t request_sz, uint8_t **buffer_addr,
	118	size_t buffer_sz, void data)
	119	{
	120	enum bt_ctf_notif_iter_medium_status status =
	121	BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK;
	122	struct ctf_fs_stream *stream = data;
56a1cced	123	struct ctf_fs_component *ctf_fs = stream->file->ctf_fs;
e98a2d6e PP	124
	125	if (request_sz == 0) {
	126	goto end;
	127	}
	128
e98a2d6e PP	129	/* Check if we have at least one memory-mapped byte left */
	130	if (remaining_mmap_bytes(stream) == 0) {
	131	/* Are we at the end of the file? */
e0f6a64a	132	if (stream->mmap_offset >= stream->file->size) {
e98a2d6e PP	133	PDBG("Reached end of file \"%s\" (%p)\n",
	134	stream->file->path->str, stream->file->fp);
	135	status = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF;
	136	goto end;
	137	}
	138
e0f6a64a JG	139	status = mmap_next(stream);
	140	switch (status) {
	141	case BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK:
	142	break;
	143	case BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF:
	144	goto end;
	145	default:
e98a2d6e	146	PERR("Cannot memory-map next region of file \"%s\" (%p)\n",
e0f6a64a JG	147	stream->file->path->str,
e0f6a64a JG	148	stream->file->fp);
e98a2d6e PP	149	goto error;
	150	}
	151	}
	152
	153	*buffer_sz = MIN(remaining_mmap_bytes(stream), request_sz);
fc9a526c	154	buffer_addr = ((uint8_t ) stream->mmap_addr) + stream->request_offset;
e98a2d6e PP	155	stream->request_offset += *buffer_sz;
	156	goto end;
	157
	158	error:
	159	status = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_ERROR;
	160
	161	end:
	162	return status;
	163	}
	164
5b29e799 JG	165	static
5b29e799 JG	166	struct bt_ctf_stream *medop_get_stream(
e98a2d6e PP	167	struct bt_ctf_stream_class stream_class, void data)
	168	{
	169	struct ctf_fs_stream *fs_stream = data;
56a1cced	170	struct ctf_fs_component *ctf_fs = fs_stream->file->ctf_fs;
e98a2d6e PP	171
	172	if (!fs_stream->stream) {
	173	int64_t id = bt_ctf_stream_class_get_id(stream_class);
	174
	175	PDBG("Creating stream out of stream class %" PRId64 "\n", id);
	176	fs_stream->stream = bt_ctf_stream_create(stream_class,
fc9a526c	177	fs_stream->file->path->str);
e98a2d6e PP	178	if (!fs_stream->stream) {
e98a2d6e PP	179	PERR("Cannot create stream (stream class %" PRId64 ")\n",
fc9a526c	180	id);
e98a2d6e PP	181	}
	182	}
	183
	184	return fs_stream->stream;
	185	}
	186
	187	static struct bt_ctf_notif_iter_medium_ops medops = {
	188	.request_bytes = medop_request_bytes,
	189	.get_stream = medop_get_stream,
	190	};
	191
b6c3dcb2 JG	192	static
	193	int build_index_from_idx_file(struct ctf_fs_stream *stream)
	194	{
	195	int ret = 0;
	196	gchar *directory = NULL;
	197	gchar *basename = NULL;
	198	GString *index_basename = NULL;
	199	gchar *index_file_path = NULL;
	200	GMappedFile *mapped_file = NULL;
	201	gsize filesize;
	202	const struct ctf_packet_index_file_hdr *header;
	203	const char mmap_begin, file_pos;
	204	struct index_entry *index;
	205	uint64_t total_packets_size = 0;
	206	size_t file_index_entry_size;
	207	size_t file_entry_count;
	208	size_t i;
	209
	210	/* Look for index file in relative path index/name.idx. */
	211	basename = g_path_get_basename(stream->file->path->str);
	212	if (!basename) {
	213	ret = -1;
	214	goto end;
	215	}
	216
	217	directory = g_path_get_dirname(stream->file->path->str);
	218	if (!directory) {
	219	ret = -1;
	220	goto end;
	221	}
	222
	223	index_basename = g_string_new(basename);
	224	if (!index_basename) {
	225	ret = -1;
	226	goto end;
	227	}
	228
	229	g_string_append(index_basename, ".idx");
	230	index_file_path = g_build_filename(directory, "index",
	231	index_basename->str, NULL);
	232	mapped_file = g_mapped_file_new(index_file_path, FALSE, NULL);
06367fa3 JG	233	if (!mapped_file) {
	234	ret = -1;
	235	goto end;
	236	}
b6c3dcb2 JG	237	filesize = g_mapped_file_get_length(mapped_file);
	238	if (filesize < sizeof(*header)) {
	239	printf_error("Invalid LTTng trace index: file size < header size");
	240	ret = -1;
	241	goto end;
	242	}
	243
	244	mmap_begin = g_mapped_file_get_contents(mapped_file);
	245	header = (struct ctf_packet_index_file_hdr *) mmap_begin;
	246
	247	file_pos = g_mapped_file_get_contents(mapped_file) + sizeof(*header);
	248	if (be32toh(header->magic) != CTF_INDEX_MAGIC) {
	249	printf_error("Invalid LTTng trace index: \"magic\" validation failed");
	250	ret = -1;
	251	goto end;
	252	}
b6c3dcb2 JG	253
	254	file_index_entry_size = be32toh(header->packet_index_len);
	255	file_entry_count = (filesize - sizeof(*header)) / file_index_entry_size;
	256	if ((filesize - sizeof(header)) % (file_entry_count file_index_entry_size)) {
	257	printf_error("Invalid index file size; not a multiple of index entry size");
	258	ret = -1;
	259	goto end;
	260	}
	261
	262	stream->index.entries = g_array_sized_new(FALSE, TRUE,
	263	sizeof(struct index_entry), file_entry_count);
	264	if (!stream->index.entries) {
	265	ret = -1;
	266	goto end;
	267	}
	268	index = (struct index_entry *) stream->index.entries->data;
	269	for (i = 0; i < file_entry_count; i++) {
	270	struct ctf_packet_index *file_index =
	271	(struct ctf_packet_index *) file_pos;
	272	uint64_t packet_size = be64toh(file_index->packet_size);
	273
	274	if (packet_size % CHAR_BIT) {
	275	ret = -1;
	276	printf_error("Invalid packet size encountered in index file");
	277	goto invalid_index;
	278	}
	279
	280	/* Convert size in bits to bytes. */
	281	packet_size /= CHAR_BIT;
	282	index->packet_size = packet_size;
	283
	284	index->offset = be64toh(file_index->offset);
	285	if (i != 0 && index->offset < (index - 1)->offset) {
	286	printf_error("Invalid, non-monotonic, packet offset encountered in index file");
	287	ret = -1;
	288	goto invalid_index;
	289	}
	290
	291	index->timestamp_begin = be64toh(file_index->timestamp_begin);
	292	index->timestamp_end = be64toh(file_index->timestamp_end);
	293	if (index->timestamp_end < index->timestamp_begin) {
	294	printf_error("Invalid packet time bounds encountered in index file");
	295	ret = -1;
	296	goto invalid_index;
	297	}
	298
	299	total_packets_size += packet_size;
	300	file_pos += file_index_entry_size;
	301	index++;
	302	}
	303
	304	/* Validate that the index addresses the complete stream. */
	305	if (stream->file->size != total_packets_size) {
	306	printf_error("Invalid index; indexed size != stream file size");
	307	ret = -1;
	308	goto invalid_index;
	309	}
	310	end:
	311	g_free(directory);
	312	g_free(basename);
	313	g_free(index_file_path);
06367fa3 JG	314	if (index_basename) {
	315	g_string_free(index_basename, TRUE);
	316	}
	317	if (mapped_file) {
	318	g_mapped_file_unref(mapped_file);
	319	}
b6c3dcb2 JG	320	return ret;
	321	invalid_index:
	322	g_array_free(stream->index.entries, TRUE);
	323	goto end;
	324	}
	325
	326	static
	327	int build_index_from_stream(struct ctf_fs_stream *stream)
	328	{
	329	int ret = 0;
	330	end:
	331	return ret;
	332	}
	333
	334	static
	335	int init_stream_index(struct ctf_fs_stream *stream)
	336	{
	337	int ret;
	338
	339	ret = build_index_from_idx_file(stream);
	340	if (!ret) {
	341	goto end;
	342	}
	343
	344	ret = build_index_from_stream(stream);
	345	end:
	346	return ret;
	347	}
	348
e7a4393b JG	349	BT_HIDDEN
e7a4393b JG	350	struct ctf_fs_stream *ctf_fs_stream_create(
56a1cced	351	struct ctf_fs_component ctf_fs, struct ctf_fs_file file)
e98a2d6e	352	{
b6c3dcb2	353	int ret;
e98a2d6e PP	354	struct ctf_fs_stream *stream = g_new0(struct ctf_fs_stream, 1);
	355
	356	if (!stream) {
	357	goto error;
	358	}
	359
	360	stream->file = file;
5b29e799	361	stream->notif_iter = bt_ctf_notif_iter_create(ctf_fs->metadata->trace,
e7a4393b	362	ctf_fs->page_size, medops, stream, ctf_fs->error_fp);
e98a2d6e PP	363	if (!stream->notif_iter) {
	364	goto error;
	365	}
5b29e799	366
fc9a526c	367	stream->mmap_max_len = ctf_fs->page_size * 2048;
b6c3dcb2 JG	368	ret = init_stream_index(stream);
	369	if (ret) {
	370	goto error;
	371	}
e98a2d6e	372	goto end;
e98a2d6e	373	error:
78586d8a	374	/* Do not touch "borrowed" file. */
e98a2d6e PP	375	stream->file = NULL;
	376	ctf_fs_stream_destroy(stream);
	377	stream = NULL;
e98a2d6e PP	378	end:
	379	return stream;
	380	}
	381
5b29e799 JG	382	BT_HIDDEN
5b29e799 JG	383	void ctf_fs_stream_destroy(struct ctf_fs_stream *stream)
e98a2d6e	384	{
5b29e799 JG	385	if (!stream) {
5b29e799 JG	386	return;
043e2020 JG	387	}
043e2020 JG	388
5b29e799 JG	389	if (stream->file) {
5b29e799 JG	390	ctf_fs_file_destroy(stream->file);
e98a2d6e PP	391	}
e98a2d6e PP	392
5b29e799 JG	393	if (stream->stream) {
5b29e799 JG	394	BT_PUT(stream->stream);
043e2020	395	}
5b29e799 JG	396
	397	if (stream->notif_iter) {
	398	bt_ctf_notif_iter_destroy(stream->notif_iter);
78586d8a	399	}
5b29e799	400
b6c3dcb2 JG	401	if (stream->index.entries) {
	402	g_array_free(stream->index.entries, TRUE);
	403	}
	404
5b29e799	405	g_free(stream);
e98a2d6e	406	}