| 1 | /* |
| 2 | * Copyright 2016-2017 - Philippe Proulx <pproulx@efficios.com> |
| 3 | * Copyright 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 4 | * Copyright 2010-2011 - EfficiOS Inc. and Linux Foundation |
| 5 | * |
| 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 <stdlib.h> |
| 26 | #include <stdio.h> |
| 27 | #include <stdint.h> |
| 28 | #include <stdlib.h> |
| 29 | #include <stdbool.h> |
| 30 | #include <glib.h> |
| 31 | #include <inttypes.h> |
| 32 | #include <babeltrace/compat/mman-internal.h> |
| 33 | #include <babeltrace/endian-internal.h> |
| 34 | #include <babeltrace/babeltrace.h> |
| 35 | #include <babeltrace/common-internal.h> |
| 36 | #include "file.h" |
| 37 | #include "metadata.h" |
| 38 | #include "../common/msg-iter/msg-iter.h" |
| 39 | #include <babeltrace/assert-internal.h> |
| 40 | #include "data-stream-file.h" |
| 41 | #include <string.h> |
| 42 | |
| 43 | #define BT_LOG_TAG "PLUGIN-CTF-FS-SRC-DS" |
| 44 | #include "logging.h" |
| 45 | |
| 46 | static inline |
| 47 | size_t remaining_mmap_bytes(struct ctf_fs_ds_file *ds_file) |
| 48 | { |
| 49 | return ds_file->mmap_len - ds_file->request_offset; |
| 50 | } |
| 51 | |
| 52 | static |
| 53 | int ds_file_munmap(struct ctf_fs_ds_file *ds_file) |
| 54 | { |
| 55 | int ret = 0; |
| 56 | |
| 57 | if (!ds_file || !ds_file->mmap_addr) { |
| 58 | goto end; |
| 59 | } |
| 60 | |
| 61 | if (bt_munmap(ds_file->mmap_addr, ds_file->mmap_len)) { |
| 62 | BT_LOGE_ERRNO("Cannot memory-unmap file", |
| 63 | ": address=%p, size=%zu, file_path=\"%s\", file=%p", |
| 64 | ds_file->mmap_addr, ds_file->mmap_len, |
| 65 | ds_file->file ? ds_file->file->path->str : "NULL", |
| 66 | ds_file->file ? ds_file->file->fp : NULL); |
| 67 | ret = -1; |
| 68 | goto end; |
| 69 | } |
| 70 | |
| 71 | ds_file->mmap_addr = NULL; |
| 72 | |
| 73 | end: |
| 74 | return ret; |
| 75 | } |
| 76 | |
| 77 | static |
| 78 | enum bt_msg_iter_medium_status ds_file_mmap_next( |
| 79 | struct ctf_fs_ds_file *ds_file) |
| 80 | { |
| 81 | enum bt_msg_iter_medium_status ret = |
| 82 | BT_MSG_ITER_MEDIUM_STATUS_OK; |
| 83 | |
| 84 | /* Unmap old region */ |
| 85 | if (ds_file->mmap_addr) { |
| 86 | if (ds_file_munmap(ds_file)) { |
| 87 | goto error; |
| 88 | } |
| 89 | |
| 90 | /* |
| 91 | * mmap_len is guaranteed to be page-aligned except on the |
| 92 | * last mapping where it may not be possible (since the file's |
| 93 | * size itself may not be a page multiple). |
| 94 | */ |
| 95 | ds_file->mmap_offset += ds_file->mmap_len; |
| 96 | ds_file->request_offset = 0; |
| 97 | } |
| 98 | |
| 99 | ds_file->mmap_len = MIN(ds_file->file->size - ds_file->mmap_offset, |
| 100 | ds_file->mmap_max_len); |
| 101 | if (ds_file->mmap_len == 0) { |
| 102 | ret = BT_MSG_ITER_MEDIUM_STATUS_EOF; |
| 103 | goto end; |
| 104 | } |
| 105 | /* Map new region */ |
| 106 | BT_ASSERT(ds_file->mmap_len); |
| 107 | ds_file->mmap_addr = bt_mmap((void *) 0, ds_file->mmap_len, |
| 108 | PROT_READ, MAP_PRIVATE, fileno(ds_file->file->fp), |
| 109 | ds_file->mmap_offset); |
| 110 | if (ds_file->mmap_addr == MAP_FAILED) { |
| 111 | BT_LOGE("Cannot memory-map address (size %zu) of file \"%s\" (%p) at offset %jd: %s", |
| 112 | ds_file->mmap_len, ds_file->file->path->str, |
| 113 | ds_file->file->fp, (intmax_t) ds_file->mmap_offset, |
| 114 | strerror(errno)); |
| 115 | goto error; |
| 116 | } |
| 117 | |
| 118 | goto end; |
| 119 | error: |
| 120 | ds_file_munmap(ds_file); |
| 121 | ret = BT_MSG_ITER_MEDIUM_STATUS_ERROR; |
| 122 | end: |
| 123 | return ret; |
| 124 | } |
| 125 | |
| 126 | static |
| 127 | enum bt_msg_iter_medium_status medop_request_bytes( |
| 128 | size_t request_sz, uint8_t **buffer_addr, |
| 129 | size_t *buffer_sz, void *data) |
| 130 | { |
| 131 | enum bt_msg_iter_medium_status status = |
| 132 | BT_MSG_ITER_MEDIUM_STATUS_OK; |
| 133 | struct ctf_fs_ds_file *ds_file = data; |
| 134 | |
| 135 | if (request_sz == 0) { |
| 136 | goto end; |
| 137 | } |
| 138 | |
| 139 | /* Check if we have at least one memory-mapped byte left */ |
| 140 | if (remaining_mmap_bytes(ds_file) == 0) { |
| 141 | /* Are we at the end of the file? */ |
| 142 | if (ds_file->mmap_offset >= ds_file->file->size) { |
| 143 | BT_LOGD("Reached end of file \"%s\" (%p)", |
| 144 | ds_file->file->path->str, ds_file->file->fp); |
| 145 | status = BT_MSG_ITER_MEDIUM_STATUS_EOF; |
| 146 | goto end; |
| 147 | } |
| 148 | |
| 149 | status = ds_file_mmap_next(ds_file); |
| 150 | switch (status) { |
| 151 | case BT_MSG_ITER_MEDIUM_STATUS_OK: |
| 152 | break; |
| 153 | case BT_MSG_ITER_MEDIUM_STATUS_EOF: |
| 154 | goto end; |
| 155 | default: |
| 156 | BT_LOGE("Cannot memory-map next region of file \"%s\" (%p)", |
| 157 | ds_file->file->path->str, |
| 158 | ds_file->file->fp); |
| 159 | goto error; |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | *buffer_sz = MIN(remaining_mmap_bytes(ds_file), request_sz); |
| 164 | *buffer_addr = ((uint8_t *) ds_file->mmap_addr) + ds_file->request_offset; |
| 165 | ds_file->request_offset += *buffer_sz; |
| 166 | goto end; |
| 167 | |
| 168 | error: |
| 169 | status = BT_MSG_ITER_MEDIUM_STATUS_ERROR; |
| 170 | |
| 171 | end: |
| 172 | return status; |
| 173 | } |
| 174 | |
| 175 | static |
| 176 | bt_stream *medop_borrow_stream(bt_stream_class *stream_class, int64_t stream_id, |
| 177 | void *data) |
| 178 | { |
| 179 | struct ctf_fs_ds_file *ds_file = data; |
| 180 | bt_stream_class *ds_file_stream_class; |
| 181 | bt_stream *stream = NULL; |
| 182 | |
| 183 | ds_file_stream_class = bt_stream_borrow_class( |
| 184 | ds_file->stream); |
| 185 | |
| 186 | if (stream_class != ds_file_stream_class) { |
| 187 | /* |
| 188 | * Not supported: two packets described by two different |
| 189 | * stream classes within the same data stream file. |
| 190 | */ |
| 191 | goto end; |
| 192 | } |
| 193 | |
| 194 | stream = ds_file->stream; |
| 195 | |
| 196 | end: |
| 197 | return stream; |
| 198 | } |
| 199 | |
| 200 | static |
| 201 | enum bt_msg_iter_medium_status medop_seek(enum bt_msg_iter_seek_whence whence, |
| 202 | off_t offset, void *data) |
| 203 | { |
| 204 | enum bt_msg_iter_medium_status ret = |
| 205 | BT_MSG_ITER_MEDIUM_STATUS_OK; |
| 206 | struct ctf_fs_ds_file *ds_file = data; |
| 207 | off_t file_size = ds_file->file->size; |
| 208 | |
| 209 | if (whence != BT_MSG_ITER_SEEK_WHENCE_SET || |
| 210 | offset < 0 || offset > file_size) { |
| 211 | BT_LOGE("Invalid medium seek request: whence=%d, offset=%jd, " |
| 212 | "file-size=%jd", (int) whence, offset, |
| 213 | file_size); |
| 214 | ret = BT_MSG_ITER_MEDIUM_STATUS_INVAL; |
| 215 | goto end; |
| 216 | } |
| 217 | |
| 218 | /* |
| 219 | * Determine whether or not the destination is contained within the |
| 220 | * current mapping. |
| 221 | */ |
| 222 | if (ds_file->mmap_addr && (offset < ds_file->mmap_offset || |
| 223 | offset >= ds_file->mmap_offset + ds_file->mmap_len)) { |
| 224 | int unmap_ret; |
| 225 | off_t offset_in_mapping = offset % bt_common_get_page_size(); |
| 226 | |
| 227 | BT_LOGD("Medium seek request cannot be accomodated by the current " |
| 228 | "file mapping: offset=%jd, mmap-offset=%jd, " |
| 229 | "mmap-len=%zu", offset, ds_file->mmap_offset, |
| 230 | ds_file->mmap_len); |
| 231 | unmap_ret = ds_file_munmap(ds_file); |
| 232 | if (unmap_ret) { |
| 233 | ret = BT_MSG_ITER_MEDIUM_STATUS_ERROR; |
| 234 | goto end; |
| 235 | } |
| 236 | |
| 237 | ds_file->mmap_offset = offset - offset_in_mapping; |
| 238 | ds_file->request_offset = offset_in_mapping; |
| 239 | ret = ds_file_mmap_next(ds_file); |
| 240 | if (ret != BT_MSG_ITER_MEDIUM_STATUS_OK) { |
| 241 | goto end; |
| 242 | } |
| 243 | } else { |
| 244 | ds_file->request_offset = offset - ds_file->mmap_offset; |
| 245 | } |
| 246 | |
| 247 | ds_file->end_reached = (offset == file_size); |
| 248 | end: |
| 249 | return ret; |
| 250 | } |
| 251 | |
| 252 | BT_HIDDEN |
| 253 | struct bt_msg_iter_medium_ops ctf_fs_ds_file_medops = { |
| 254 | .request_bytes = medop_request_bytes, |
| 255 | .borrow_stream = medop_borrow_stream, |
| 256 | .seek = medop_seek, |
| 257 | }; |
| 258 | |
| 259 | static |
| 260 | struct ctf_fs_ds_index *ctf_fs_ds_index_create(size_t length) |
| 261 | { |
| 262 | struct ctf_fs_ds_index *index = g_new0(struct ctf_fs_ds_index, 1); |
| 263 | |
| 264 | if (!index) { |
| 265 | BT_LOGE_STR("Failed to allocate index"); |
| 266 | goto error; |
| 267 | } |
| 268 | |
| 269 | index->entries = g_array_sized_new(FALSE, TRUE, |
| 270 | sizeof(struct ctf_fs_ds_index_entry), length); |
| 271 | if (!index->entries) { |
| 272 | BT_LOGE("Failed to allocate %zu index entries.", length); |
| 273 | goto error; |
| 274 | } |
| 275 | g_array_set_size(index->entries, length); |
| 276 | end: |
| 277 | return index; |
| 278 | error: |
| 279 | ctf_fs_ds_index_destroy(index); |
| 280 | goto end; |
| 281 | } |
| 282 | |
| 283 | /* Returns a new, zeroed, index entry. */ |
| 284 | static |
| 285 | struct ctf_fs_ds_index_entry *ctf_fs_ds_index_add_new_entry( |
| 286 | struct ctf_fs_ds_index *index) |
| 287 | { |
| 288 | g_array_set_size(index->entries, index->entries->len + 1); |
| 289 | return &g_array_index(index->entries, struct ctf_fs_ds_index_entry, |
| 290 | index->entries->len - 1); |
| 291 | } |
| 292 | |
| 293 | static |
| 294 | int convert_cycles_to_ns(struct ctf_clock_class *clock_class, |
| 295 | uint64_t cycles, int64_t *ns) |
| 296 | { |
| 297 | return bt_util_clock_cycles_to_ns_from_origin(cycles, |
| 298 | clock_class->frequency, clock_class->offset_seconds, |
| 299 | clock_class->offset_cycles, ns); |
| 300 | } |
| 301 | |
| 302 | static |
| 303 | struct ctf_fs_ds_index *build_index_from_idx_file( |
| 304 | struct ctf_fs_ds_file *ds_file) |
| 305 | { |
| 306 | int ret; |
| 307 | gchar *directory = NULL; |
| 308 | gchar *basename = NULL; |
| 309 | GString *index_basename = NULL; |
| 310 | gchar *index_file_path = NULL; |
| 311 | GMappedFile *mapped_file = NULL; |
| 312 | gsize filesize; |
| 313 | const char *mmap_begin = NULL, *file_pos = NULL; |
| 314 | const struct ctf_packet_index_file_hdr *header = NULL; |
| 315 | struct ctf_fs_ds_index *index = NULL; |
| 316 | struct ctf_fs_ds_index_entry *index_entry = NULL; |
| 317 | uint64_t total_packets_size = 0; |
| 318 | size_t file_index_entry_size; |
| 319 | size_t file_entry_count; |
| 320 | size_t i; |
| 321 | struct ctf_stream_class *sc; |
| 322 | struct bt_msg_iter_packet_properties props; |
| 323 | |
| 324 | BT_LOGD("Building index from .idx file of stream file %s", |
| 325 | ds_file->file->path->str); |
| 326 | ret = bt_msg_iter_get_packet_properties(ds_file->msg_iter, &props); |
| 327 | if (ret) { |
| 328 | BT_LOGD_STR("Cannot read first packet's header and context fields."); |
| 329 | goto error; |
| 330 | } |
| 331 | |
| 332 | sc = ctf_trace_class_borrow_stream_class_by_id(ds_file->metadata->tc, |
| 333 | props.stream_class_id); |
| 334 | BT_ASSERT(sc); |
| 335 | if (!sc->default_clock_class) { |
| 336 | BT_LOGD_STR("Cannot find stream class's default clock class."); |
| 337 | goto error; |
| 338 | } |
| 339 | |
| 340 | /* Look for index file in relative path index/name.idx. */ |
| 341 | basename = g_path_get_basename(ds_file->file->path->str); |
| 342 | if (!basename) { |
| 343 | BT_LOGE("Cannot get the basename of datastream file %s", |
| 344 | ds_file->file->path->str); |
| 345 | goto error; |
| 346 | } |
| 347 | |
| 348 | directory = g_path_get_dirname(ds_file->file->path->str); |
| 349 | if (!directory) { |
| 350 | BT_LOGE("Cannot get dirname of datastream file %s", |
| 351 | ds_file->file->path->str); |
| 352 | goto error; |
| 353 | } |
| 354 | |
| 355 | index_basename = g_string_new(basename); |
| 356 | if (!index_basename) { |
| 357 | BT_LOGE_STR("Cannot allocate index file basename string"); |
| 358 | goto error; |
| 359 | } |
| 360 | |
| 361 | g_string_append(index_basename, ".idx"); |
| 362 | index_file_path = g_build_filename(directory, "index", |
| 363 | index_basename->str, NULL); |
| 364 | mapped_file = g_mapped_file_new(index_file_path, FALSE, NULL); |
| 365 | if (!mapped_file) { |
| 366 | BT_LOGD("Cannot create new mapped file %s", |
| 367 | index_file_path); |
| 368 | goto error; |
| 369 | } |
| 370 | |
| 371 | /* |
| 372 | * The g_mapped_file API limits us to 4GB files on 32-bit. |
| 373 | * Traces with such large indexes have never been seen in the wild, |
| 374 | * but this would need to be adjusted to support them. |
| 375 | */ |
| 376 | filesize = g_mapped_file_get_length(mapped_file); |
| 377 | if (filesize < sizeof(*header)) { |
| 378 | BT_LOGW("Invalid LTTng trace index file: " |
| 379 | "file size (%zu bytes) < header size (%zu bytes)", |
| 380 | filesize, sizeof(*header)); |
| 381 | goto error; |
| 382 | } |
| 383 | |
| 384 | mmap_begin = g_mapped_file_get_contents(mapped_file); |
| 385 | header = (struct ctf_packet_index_file_hdr *) mmap_begin; |
| 386 | |
| 387 | file_pos = g_mapped_file_get_contents(mapped_file) + sizeof(*header); |
| 388 | if (be32toh(header->magic) != CTF_INDEX_MAGIC) { |
| 389 | BT_LOGW_STR("Invalid LTTng trace index: \"magic\" field validation failed"); |
| 390 | goto error; |
| 391 | } |
| 392 | |
| 393 | file_index_entry_size = be32toh(header->packet_index_len); |
| 394 | file_entry_count = (filesize - sizeof(*header)) / file_index_entry_size; |
| 395 | if ((filesize - sizeof(*header)) % file_index_entry_size) { |
| 396 | BT_LOGW("Invalid LTTng trace index: the index's size after the header " |
| 397 | "(%zu bytes) is not a multiple of the index entry size " |
| 398 | "(%zu bytes)", (filesize - sizeof(*header)), |
| 399 | sizeof(*header)); |
| 400 | goto error; |
| 401 | } |
| 402 | |
| 403 | index = ctf_fs_ds_index_create(file_entry_count); |
| 404 | if (!index) { |
| 405 | goto error; |
| 406 | } |
| 407 | |
| 408 | index_entry = (struct ctf_fs_ds_index_entry *) &g_array_index( |
| 409 | index->entries, struct ctf_fs_ds_index_entry, 0); |
| 410 | for (i = 0; i < file_entry_count; i++) { |
| 411 | struct ctf_packet_index *file_index = |
| 412 | (struct ctf_packet_index *) file_pos; |
| 413 | uint64_t packet_size = be64toh(file_index->packet_size); |
| 414 | |
| 415 | if (packet_size % CHAR_BIT) { |
| 416 | BT_LOGW("Invalid packet size encountered in LTTng trace index file"); |
| 417 | goto error; |
| 418 | } |
| 419 | |
| 420 | /* Convert size in bits to bytes. */ |
| 421 | packet_size /= CHAR_BIT; |
| 422 | index_entry->packet_size = packet_size; |
| 423 | |
| 424 | index_entry->offset = be64toh(file_index->offset); |
| 425 | if (i != 0 && index_entry->offset < (index_entry - 1)->offset) { |
| 426 | BT_LOGW("Invalid, non-monotonic, packet offset encountered in LTTng trace index file: " |
| 427 | "previous offset=%" PRIu64 ", current offset=%" PRIu64, |
| 428 | (index_entry - 1)->offset, index_entry->offset); |
| 429 | goto error; |
| 430 | } |
| 431 | |
| 432 | index_entry->timestamp_begin = be64toh(file_index->timestamp_begin); |
| 433 | index_entry->timestamp_end = be64toh(file_index->timestamp_end); |
| 434 | if (index_entry->timestamp_end < index_entry->timestamp_begin) { |
| 435 | BT_LOGW("Invalid packet time bounds encountered in LTTng trace index file (begin > end): " |
| 436 | "timestamp_begin=%" PRIu64 "timestamp_end=%" PRIu64, |
| 437 | index_entry->timestamp_begin, |
| 438 | index_entry->timestamp_end); |
| 439 | goto error; |
| 440 | } |
| 441 | |
| 442 | /* Convert the packet's bound to nanoseconds since Epoch. */ |
| 443 | ret = convert_cycles_to_ns(sc->default_clock_class, |
| 444 | index_entry->timestamp_begin, |
| 445 | &index_entry->timestamp_begin_ns); |
| 446 | if (ret) { |
| 447 | BT_LOGD_STR("Failed to convert raw timestamp to nanoseconds since Epoch during index parsing"); |
| 448 | goto error; |
| 449 | } |
| 450 | ret = convert_cycles_to_ns(sc->default_clock_class, |
| 451 | index_entry->timestamp_end, |
| 452 | &index_entry->timestamp_end_ns); |
| 453 | if (ret) { |
| 454 | BT_LOGD_STR("Failed to convert raw timestamp to nanoseconds since Epoch during LTTng trace index parsing"); |
| 455 | goto error; |
| 456 | } |
| 457 | |
| 458 | total_packets_size += packet_size; |
| 459 | file_pos += file_index_entry_size; |
| 460 | index_entry++; |
| 461 | } |
| 462 | |
| 463 | /* Validate that the index addresses the complete stream. */ |
| 464 | if (ds_file->file->size != total_packets_size) { |
| 465 | BT_LOGW("Invalid LTTng trace index file; indexed size != stream file size: " |
| 466 | "file-size=%" PRIu64 ", total-packets-size=%" PRIu64, |
| 467 | ds_file->file->size, total_packets_size); |
| 468 | goto error; |
| 469 | } |
| 470 | end: |
| 471 | g_free(directory); |
| 472 | g_free(basename); |
| 473 | g_free(index_file_path); |
| 474 | if (index_basename) { |
| 475 | g_string_free(index_basename, TRUE); |
| 476 | } |
| 477 | if (mapped_file) { |
| 478 | g_mapped_file_unref(mapped_file); |
| 479 | } |
| 480 | return index; |
| 481 | error: |
| 482 | ctf_fs_ds_index_destroy(index); |
| 483 | index = NULL; |
| 484 | goto end; |
| 485 | } |
| 486 | |
| 487 | static |
| 488 | int init_index_entry(struct ctf_fs_ds_index_entry *entry, |
| 489 | struct ctf_fs_ds_file *ds_file, |
| 490 | struct bt_msg_iter_packet_properties *props, |
| 491 | off_t packet_size, off_t packet_offset) |
| 492 | { |
| 493 | int ret = 0; |
| 494 | struct ctf_stream_class *sc; |
| 495 | |
| 496 | sc = ctf_trace_class_borrow_stream_class_by_id(ds_file->metadata->tc, |
| 497 | props->stream_class_id); |
| 498 | BT_ASSERT(sc); |
| 499 | BT_ASSERT(packet_offset >= 0); |
| 500 | entry->offset = packet_offset; |
| 501 | BT_ASSERT(packet_size >= 0); |
| 502 | entry->packet_size = packet_size; |
| 503 | |
| 504 | if (props->snapshots.beginning_clock != UINT64_C(-1)) { |
| 505 | /* Convert the packet's bound to nanoseconds since Epoch. */ |
| 506 | ret = convert_cycles_to_ns(sc->default_clock_class, |
| 507 | props->snapshots.beginning_clock, |
| 508 | &entry->timestamp_begin_ns); |
| 509 | if (ret) { |
| 510 | BT_LOGD_STR("Failed to convert raw timestamp to nanoseconds since Epoch."); |
| 511 | goto end; |
| 512 | } |
| 513 | } else { |
| 514 | entry->timestamp_begin_ns = UINT64_C(-1); |
| 515 | } |
| 516 | |
| 517 | if (props->snapshots.end_clock != UINT64_C(-1)) { |
| 518 | ret = convert_cycles_to_ns(sc->default_clock_class, |
| 519 | props->snapshots.end_clock, |
| 520 | &entry->timestamp_end_ns); |
| 521 | if (ret) { |
| 522 | BT_LOGD_STR("Failed to convert raw timestamp to nanoseconds since Epoch."); |
| 523 | goto end; |
| 524 | } |
| 525 | } else { |
| 526 | entry->timestamp_end_ns = UINT64_C(-1); |
| 527 | } |
| 528 | |
| 529 | end: |
| 530 | return ret; |
| 531 | } |
| 532 | |
| 533 | static |
| 534 | struct ctf_fs_ds_index *build_index_from_stream_file( |
| 535 | struct ctf_fs_ds_file *ds_file) |
| 536 | { |
| 537 | int ret; |
| 538 | struct ctf_fs_ds_index *index = NULL; |
| 539 | enum bt_msg_iter_status iter_status = BT_MSG_ITER_STATUS_OK; |
| 540 | off_t current_packet_offset_bytes = 0; |
| 541 | |
| 542 | BT_LOGD("Indexing stream file %s", ds_file->file->path->str); |
| 543 | |
| 544 | index = ctf_fs_ds_index_create(0); |
| 545 | if (!index) { |
| 546 | goto error; |
| 547 | } |
| 548 | |
| 549 | do { |
| 550 | off_t current_packet_size_bytes; |
| 551 | struct ctf_fs_ds_index_entry *entry; |
| 552 | struct bt_msg_iter_packet_properties props; |
| 553 | |
| 554 | if (current_packet_offset_bytes < 0) { |
| 555 | BT_LOGE_STR("Cannot get the current packet's offset."); |
| 556 | goto error; |
| 557 | } else if (current_packet_offset_bytes > ds_file->file->size) { |
| 558 | BT_LOGE_STR("Unexpected current packet's offset (larger than file)."); |
| 559 | goto error; |
| 560 | } else if (current_packet_offset_bytes == ds_file->file->size) { |
| 561 | /* No more data */ |
| 562 | break; |
| 563 | } |
| 564 | |
| 565 | iter_status = bt_msg_iter_seek(ds_file->msg_iter, |
| 566 | current_packet_offset_bytes); |
| 567 | if (iter_status != BT_MSG_ITER_STATUS_OK) { |
| 568 | goto error; |
| 569 | } |
| 570 | |
| 571 | iter_status = bt_msg_iter_get_packet_properties( |
| 572 | ds_file->msg_iter, &props); |
| 573 | if (iter_status != BT_MSG_ITER_STATUS_OK) { |
| 574 | goto error; |
| 575 | } |
| 576 | |
| 577 | if (props.exp_packet_total_size >= 0) { |
| 578 | current_packet_size_bytes = |
| 579 | (uint64_t) props.exp_packet_total_size / 8; |
| 580 | } else { |
| 581 | current_packet_size_bytes = ds_file->file->size; |
| 582 | } |
| 583 | |
| 584 | if (current_packet_offset_bytes + current_packet_size_bytes > |
| 585 | ds_file->file->size) { |
| 586 | BT_LOGW("Invalid packet size reported in file: stream=\"%s\", " |
| 587 | "packet-offset=%jd, packet-size-bytes=%jd, " |
| 588 | "file-size=%jd", |
| 589 | ds_file->file->path->str, |
| 590 | current_packet_offset_bytes, |
| 591 | current_packet_size_bytes, |
| 592 | ds_file->file->size); |
| 593 | goto error; |
| 594 | } |
| 595 | |
| 596 | current_packet_offset_bytes += current_packet_size_bytes; |
| 597 | BT_LOGD("Seeking to next packet: current-packet-offset=%jd, " |
| 598 | "next-packet-offset=%jd", |
| 599 | current_packet_offset_bytes - current_packet_size_bytes, |
| 600 | current_packet_offset_bytes); |
| 601 | entry = ctf_fs_ds_index_add_new_entry(index); |
| 602 | if (!entry) { |
| 603 | BT_LOGE_STR("Failed to allocate a new index entry."); |
| 604 | goto error; |
| 605 | } |
| 606 | |
| 607 | ret = init_index_entry(entry, ds_file, &props, |
| 608 | current_packet_size_bytes, current_packet_offset_bytes); |
| 609 | if (ret) { |
| 610 | goto error; |
| 611 | } |
| 612 | } while (iter_status == BT_MSG_ITER_STATUS_OK); |
| 613 | |
| 614 | if (iter_status != BT_MSG_ITER_STATUS_OK) { |
| 615 | goto error; |
| 616 | } |
| 617 | |
| 618 | end: |
| 619 | return index; |
| 620 | |
| 621 | error: |
| 622 | ctf_fs_ds_index_destroy(index); |
| 623 | index = NULL; |
| 624 | goto end; |
| 625 | } |
| 626 | |
| 627 | BT_HIDDEN |
| 628 | struct ctf_fs_ds_file *ctf_fs_ds_file_create( |
| 629 | struct ctf_fs_trace *ctf_fs_trace, |
| 630 | bt_self_message_iterator *pc_msg_iter, |
| 631 | struct bt_msg_iter *msg_iter, |
| 632 | bt_stream *stream, const char *path) |
| 633 | { |
| 634 | int ret; |
| 635 | const size_t page_size = bt_common_get_page_size(); |
| 636 | struct ctf_fs_ds_file *ds_file = g_new0(struct ctf_fs_ds_file, 1); |
| 637 | |
| 638 | if (!ds_file) { |
| 639 | goto error; |
| 640 | } |
| 641 | |
| 642 | ds_file->pc_msg_iter = pc_msg_iter; |
| 643 | ds_file->file = ctf_fs_file_create(); |
| 644 | if (!ds_file->file) { |
| 645 | goto error; |
| 646 | } |
| 647 | |
| 648 | ds_file->stream = stream; |
| 649 | bt_stream_get_ref(ds_file->stream); |
| 650 | ds_file->metadata = ctf_fs_trace->metadata; |
| 651 | g_string_assign(ds_file->file->path, path); |
| 652 | ret = ctf_fs_file_open(ds_file->file, "rb"); |
| 653 | if (ret) { |
| 654 | goto error; |
| 655 | } |
| 656 | |
| 657 | ds_file->msg_iter = msg_iter; |
| 658 | bt_msg_iter_set_medops_data(ds_file->msg_iter, ds_file); |
| 659 | if (!ds_file->msg_iter) { |
| 660 | goto error; |
| 661 | } |
| 662 | |
| 663 | ds_file->mmap_max_len = page_size * 2048; |
| 664 | |
| 665 | goto end; |
| 666 | |
| 667 | error: |
| 668 | /* Do not touch "borrowed" file. */ |
| 669 | ctf_fs_ds_file_destroy(ds_file); |
| 670 | ds_file = NULL; |
| 671 | |
| 672 | end: |
| 673 | return ds_file; |
| 674 | } |
| 675 | |
| 676 | BT_HIDDEN |
| 677 | struct ctf_fs_ds_index *ctf_fs_ds_file_build_index( |
| 678 | struct ctf_fs_ds_file *ds_file) |
| 679 | { |
| 680 | struct ctf_fs_ds_index *index; |
| 681 | |
| 682 | index = build_index_from_idx_file(ds_file); |
| 683 | if (index) { |
| 684 | goto end; |
| 685 | } |
| 686 | |
| 687 | BT_LOGD("Failed to build index from .index file; " |
| 688 | "falling back to stream indexing."); |
| 689 | index = build_index_from_stream_file(ds_file); |
| 690 | end: |
| 691 | return index; |
| 692 | } |
| 693 | |
| 694 | BT_HIDDEN |
| 695 | void ctf_fs_ds_file_destroy(struct ctf_fs_ds_file *ds_file) |
| 696 | { |
| 697 | if (!ds_file) { |
| 698 | return; |
| 699 | } |
| 700 | |
| 701 | bt_stream_put_ref(ds_file->stream); |
| 702 | (void) ds_file_munmap(ds_file); |
| 703 | |
| 704 | if (ds_file->file) { |
| 705 | ctf_fs_file_destroy(ds_file->file); |
| 706 | } |
| 707 | |
| 708 | g_free(ds_file); |
| 709 | } |
| 710 | |
| 711 | BT_HIDDEN |
| 712 | bt_self_message_iterator_status ctf_fs_ds_file_next( |
| 713 | struct ctf_fs_ds_file *ds_file, |
| 714 | bt_message **msg) |
| 715 | { |
| 716 | enum bt_msg_iter_status msg_iter_status; |
| 717 | bt_self_message_iterator_status status; |
| 718 | |
| 719 | msg_iter_status = bt_msg_iter_get_next_message( |
| 720 | ds_file->msg_iter, ds_file->pc_msg_iter, msg); |
| 721 | |
| 722 | switch (msg_iter_status) { |
| 723 | case BT_MSG_ITER_STATUS_EOF: |
| 724 | status = BT_SELF_MESSAGE_ITERATOR_STATUS_END; |
| 725 | break; |
| 726 | case BT_MSG_ITER_STATUS_OK: |
| 727 | status = BT_SELF_MESSAGE_ITERATOR_STATUS_OK; |
| 728 | break; |
| 729 | case BT_MSG_ITER_STATUS_AGAIN: |
| 730 | /* |
| 731 | * Should not make it this far as this is |
| 732 | * medium-specific; there is nothing for the user to do |
| 733 | * and it should have been handled upstream. |
| 734 | */ |
| 735 | abort(); |
| 736 | case BT_MSG_ITER_STATUS_INVAL: |
| 737 | case BT_MSG_ITER_STATUS_ERROR: |
| 738 | default: |
| 739 | status = BT_SELF_MESSAGE_ITERATOR_STATUS_ERROR; |
| 740 | break; |
| 741 | } |
| 742 | return status; |
| 743 | } |
| 744 | |
| 745 | BT_HIDDEN |
| 746 | void ctf_fs_ds_index_destroy(struct ctf_fs_ds_index *index) |
| 747 | { |
| 748 | if (!index) { |
| 749 | return; |
| 750 | } |
| 751 | |
| 752 | if (index->entries) { |
| 753 | g_array_free(index->entries, TRUE); |
| 754 | } |
| 755 | g_free(index); |
| 756 | } |