plugins/ctf/fs-src/data-stream-file.c

   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/ctf-ir/stream.h>
  35 #include <babeltrace/graph/notification-iterator.h>
  36 #include <babeltrace/graph/notification-stream.h>
  37 #include <babeltrace/graph/notification-event.h>
  38 #include <babeltrace/graph/notification-packet.h>
  39 #include <babeltrace/common-internal.h>
  40 #include "file.h"
  41 #include "metadata.h"
  42 #include "../common/notif-iter/notif-iter.h"
  43 #include <assert.h>
  44 #include "data-stream-file.h"
  45 #include <string.h>
  46
  47 #define BT_LOG_TAG "PLUGIN-CTF-FS-SRC-DS"
  48 #include "logging.h"
  49
  50 static inline
  51 size_t remaining_mmap_bytes(struct ctf_fs_ds_file *ds_file)
  52 {
  53         return ds_file->mmap_valid_len - ds_file->request_offset;
  54 }
  55
  56 static
  57 int ds_file_munmap(struct ctf_fs_ds_file *ds_file)
  58 {
  59         int ret = 0;
  60
  61         if (!ds_file || !ds_file->mmap_addr) {
  62                 goto end;
  63         }
  64
  65         if (munmap(ds_file->mmap_addr, ds_file->mmap_len)) {
  66                 BT_LOGE("Cannot memory-unmap address %p (size %zu) of file \"%s\" (%p): %s",
  67                         ds_file->mmap_addr, ds_file->mmap_len,
  68                         ds_file->file->path->str, ds_file->file->fp,
  69                         strerror(errno));
  70                 ret = -1;
  71                 goto end;
  72         }
  73
  74         ds_file->mmap_addr = NULL;
  75
  76 end:
  77         return ret;
  78 }
  79
  80 static
  81 enum bt_ctf_notif_iter_medium_status ds_file_mmap_next(
  82                 struct ctf_fs_ds_file *ds_file)
  83 {
  84         const size_t page_size = bt_common_get_page_size();
  85         enum bt_ctf_notif_iter_medium_status ret =
  86                         BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK;
  87
  88         /* Unmap old region */
  89         if (ds_file->mmap_addr) {
  90                 if (ds_file_munmap(ds_file)) {
  91                         goto error;
  92                 }
  93
  94                 ds_file->mmap_offset += ds_file->mmap_valid_len;
  95                 ds_file->request_offset = 0;
  96         }
  97
  98         ds_file->mmap_valid_len = MIN(ds_file->file->size - ds_file->mmap_offset,
  99                         ds_file->mmap_max_len);
 100         if (ds_file->mmap_valid_len == 0) {
 101                 ret = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF;
 102                 goto end;
 103         }
 104         /* Round up to next page, assuming page size being a power of 2. */
 105         ds_file->mmap_len = (ds_file->mmap_valid_len + page_size - 1)
 106                         & ~(page_size - 1);
 107         /* Map new region */
 108         assert(ds_file->mmap_len);
 109         ds_file->mmap_addr = mmap((void *) 0, ds_file->mmap_len,
 110                         PROT_READ, MAP_PRIVATE, fileno(ds_file->file->fp),
 111                         ds_file->mmap_offset);
 112         if (ds_file->mmap_addr == MAP_FAILED) {
 113                 BT_LOGE("Cannot memory-map address (size %zu) of file \"%s\" (%p) at offset %zu: %s",
 114                                 ds_file->mmap_len, ds_file->file->path->str,
 115                                 ds_file->file->fp, ds_file->mmap_offset,
 116                                 strerror(errno));
 117                 goto error;
 118         }
 119
 120         goto end;
 121 error:
 122         ds_file_munmap(ds_file);
 123         ret = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_ERROR;
 124 end:
 125         return ret;
 126 }
 127
 128 static
 129 enum bt_ctf_notif_iter_medium_status medop_request_bytes(
 130                 size_t request_sz, uint8_t **buffer_addr,
 131                 size_t *buffer_sz, void *data)
 132 {
 133         enum bt_ctf_notif_iter_medium_status status =
 134                 BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK;
 135         struct ctf_fs_ds_file *ds_file = data;
 136
 137         if (request_sz == 0) {
 138                 goto end;
 139         }
 140
 141         /* Check if we have at least one memory-mapped byte left */
 142         if (remaining_mmap_bytes(ds_file) == 0) {
 143                 /* Are we at the end of the file? */
 144                 if (ds_file->mmap_offset >= ds_file->file->size) {
 145                         BT_LOGD("Reached end of file \"%s\" (%p)",
 146                                 ds_file->file->path->str, ds_file->file->fp);
 147                         status = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF;
 148                         goto end;
 149                 }
 150
 151                 status = ds_file_mmap_next(ds_file);
 152                 switch (status) {
 153                 case BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK:
 154                         break;
 155                 case BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF:
 156                         goto end;
 157                 default:
 158                         BT_LOGE("Cannot memory-map next region of file \"%s\" (%p)",
 159                                         ds_file->file->path->str,
 160                                         ds_file->file->fp);
 161                         goto error;
 162                 }
 163         }
 164
 165         *buffer_sz = MIN(remaining_mmap_bytes(ds_file), request_sz);
 166         *buffer_addr = ((uint8_t *) ds_file->mmap_addr) + ds_file->request_offset;
 167         ds_file->request_offset += *buffer_sz;
 168         goto end;
 169
 170 error:
 171         status = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_ERROR;
 172
 173 end:
 174         return status;
 175 }
 176
 177 static
 178 struct bt_ctf_stream *medop_get_stream(
 179                 struct bt_ctf_stream_class *stream_class, void *data)
 180 {
 181         struct ctf_fs_ds_file *ds_file = data;
 182         struct bt_ctf_stream_class *ds_file_stream_class;
 183         struct bt_ctf_stream *stream = NULL;
 184
 185         ds_file_stream_class = bt_ctf_stream_get_class(ds_file->stream);
 186         bt_put(ds_file_stream_class);
 187
 188         if (stream_class != ds_file_stream_class) {
 189                 /*
 190                  * Not supported: two packets described by two different
 191                  * stream classes within the same data stream file.
 192                  */
 193                 goto end;
 194         }
 195
 196         stream = ds_file->stream;
 197
 198 end:
 199         return stream;
 200 }
 201
 202 static struct bt_ctf_notif_iter_medium_ops medops = {
 203         .request_bytes = medop_request_bytes,
 204         .get_stream = medop_get_stream,
 205 };
 206 static
 207 struct ctf_fs_ds_index *ctf_fs_ds_index_create(size_t length)
 208 {
 209         struct ctf_fs_ds_index *index = g_new0(struct ctf_fs_ds_index, 1);
 210
 211         if (!index) {
 212                 BT_LOGE_STR("Failed to allocate index");
 213                 goto error;
 214         }
 215
 216         index->entries = g_array_sized_new(FALSE, TRUE,
 217                         sizeof(struct ctf_fs_ds_index_entry), length);
 218         if (!index->entries) {
 219                 BT_LOGE("Failed to allocate %zu index entries.", length);
 220                 goto error;
 221         }
 222         g_array_set_size(index->entries, length);
 223 end:
 224         return index;
 225 error:
 226         ctf_fs_ds_index_destroy(index);
 227         goto end;
 228 }
 229
 230 static
 231 struct bt_ctf_clock_class *get_field_mapped_clock_class(
 232                 struct bt_ctf_field *field)
 233 {
 234         struct bt_ctf_field_type *field_type;
 235         struct bt_ctf_clock_class *clock_class = NULL;
 236
 237         field_type = bt_ctf_field_get_type(field);
 238         if (!field_type) {
 239                 goto end;
 240         }
 241
 242         clock_class = bt_ctf_field_type_integer_get_mapped_clock_class(
 243                         field_type);
 244         if (!clock_class) {
 245                 goto end;
 246         }
 247 end:
 248         bt_put(field_type);
 249         return clock_class;
 250 }
 251
 252 static
 253 int get_ds_file_packet_bounds_clock_classes(struct ctf_fs_ds_file *ds_file,
 254                 struct bt_ctf_clock_class **_timestamp_begin_cc,
 255                 struct bt_ctf_clock_class **_timestamp_end_cc)
 256 {
 257         int ret;
 258         struct bt_ctf_field *timestamp_field;
 259         struct bt_ctf_field *packet_context_field = NULL;
 260         struct bt_ctf_clock_class *timestamp_begin_cc = NULL;
 261         struct bt_ctf_clock_class *timestamp_end_cc = NULL;
 262
 263         ret = ctf_fs_ds_file_get_packet_header_context_fields(ds_file,
 264                 NULL, &packet_context_field);
 265         if (ret || !packet_context_field) {
 266                 BT_LOGD("Cannot retrieve packet context field of stream \'%s\'",
 267                                 ds_file->file->path->str);
 268                 ret = -1;
 269                 goto end;
 270         }
 271
 272         timestamp_field = bt_ctf_field_structure_get_field_by_name(
 273                         packet_context_field, "timestamp_begin");
 274         if (!timestamp_field) {
 275                 BT_LOGD("Cannot retrieve timestamp_begin field in packet context of stream \'%s\'",
 276                                 ds_file->file->path->str);
 277                 ret = -1;
 278                 goto end;
 279         }
 280
 281         timestamp_begin_cc = get_field_mapped_clock_class(timestamp_field);
 282         if (!timestamp_begin_cc) {
 283                 BT_LOGD("Cannot retrieve the clock mapped to timestamp_begin of stream \'%s\'",
 284                                 ds_file->file->path->str);
 285         }
 286         bt_put(timestamp_field);
 287
 288         timestamp_field = bt_ctf_field_structure_get_field_by_name(
 289                         packet_context_field, "timestamp_end");
 290         if (!timestamp_field) {
 291                 BT_LOGD("Cannot retrieve timestamp_end field in packet context of stream \'%s\'",
 292                                 ds_file->file->path->str);
 293                 ret = -1;
 294                 goto end;
 295         }
 296
 297         timestamp_end_cc = get_field_mapped_clock_class(timestamp_field);
 298         if (!timestamp_end_cc) {
 299                 BT_LOGD("Cannot retrieve the clock mapped to timestamp_end in stream \'%s\'",
 300                                 ds_file->file->path->str);
 301         }
 302
 303         if (_timestamp_begin_cc) {
 304                 *_timestamp_begin_cc = bt_get(timestamp_begin_cc);
 305         }
 306         if (_timestamp_end_cc) {
 307                 *_timestamp_end_cc = bt_get(timestamp_end_cc);
 308         }
 309 end:
 310         bt_put(packet_context_field);
 311         bt_put(timestamp_field);
 312         bt_put(timestamp_begin_cc);
 313         bt_put(timestamp_end_cc);
 314         return ret;
 315 }
 316
 317 static
 318 int convert_cycles_to_ns(struct bt_ctf_clock_class *clock_class,
 319                 uint64_t cycles, int64_t *ns)
 320 {
 321         int ret = 0;
 322         struct bt_ctf_clock_value *clock_value;
 323
 324         assert(ns);
 325         clock_value = bt_ctf_clock_value_create(clock_class, cycles);
 326         if (!clock_value) {
 327                 ret = -1;
 328                 goto end;
 329         }
 330
 331         ret = bt_ctf_clock_value_get_value_ns_from_epoch(clock_value, ns);
 332         if (ret) {
 333                 goto end;
 334         }
 335 end:
 336         bt_put(clock_value);
 337         return ret;
 338 }
 339
 340 static
 341 struct ctf_fs_ds_index *build_index_from_idx_file(
 342                 struct ctf_fs_ds_file *ds_file)
 343 {
 344         int ret;
 345         gchar *directory = NULL;
 346         gchar *basename = NULL;
 347         GString *index_basename = NULL;
 348         gchar *index_file_path = NULL;
 349         GMappedFile *mapped_file = NULL;
 350         gsize filesize;
 351         const char *mmap_begin = NULL, *file_pos = NULL;
 352         const struct ctf_packet_index_file_hdr *header = NULL;
 353         struct ctf_fs_ds_index *index = NULL;
 354         struct ctf_fs_ds_index_entry *index_entry = NULL;
 355         uint64_t total_packets_size = 0;
 356         size_t file_index_entry_size;
 357         size_t file_entry_count;
 358         size_t i;
 359         struct bt_ctf_clock_class *timestamp_begin_cc = NULL;
 360         struct bt_ctf_clock_class *timestamp_end_cc = NULL;
 361
 362         BT_LOGD("Building index from .idx file of stream file %s",
 363                         ds_file->file->path->str);
 364
 365         ret = get_ds_file_packet_bounds_clock_classes(ds_file,
 366                         &timestamp_begin_cc, &timestamp_end_cc);
 367         if (ret) {
 368                 BT_LOGD("Cannot get clock classes of \"timestamp_begin\" and \"timestamp_end\" fields");
 369                 goto error;
 370         }
 371
 372         /* Look for index file in relative path index/name.idx. */
 373         basename = g_path_get_basename(ds_file->file->path->str);
 374         if (!basename) {
 375                 BT_LOGE("Cannot get the basename of datastream file %s",
 376                                 ds_file->file->path->str);
 377                 goto error;
 378         }
 379
 380         directory = g_path_get_dirname(ds_file->file->path->str);
 381         if (!directory) {
 382                 BT_LOGE("Cannot get dirname of datastream file %s",
 383                                 ds_file->file->path->str);
 384                 goto error;
 385         }
 386
 387         index_basename = g_string_new(basename);
 388         if (!index_basename) {
 389                 BT_LOGE("Cannot allocate index file basename string");
 390                 goto error;
 391         }
 392
 393         g_string_append(index_basename, ".idx");
 394         index_file_path = g_build_filename(directory, "index",
 395                         index_basename->str, NULL);
 396         mapped_file = g_mapped_file_new(index_file_path, FALSE, NULL);
 397         if (!mapped_file) {
 398                 BT_LOGD("Cannot create new mapped file %s",
 399                                 index_file_path);
 400                 goto error;
 401         }
 402         filesize = g_mapped_file_get_length(mapped_file);
 403         if (filesize < sizeof(*header)) {
 404                 BT_LOGW("Invalid LTTng trace index file: file size < header size");
 405                 goto error;
 406         }
 407
 408         mmap_begin = g_mapped_file_get_contents(mapped_file);
 409         header = (struct ctf_packet_index_file_hdr *) mmap_begin;
 410
 411         file_pos = g_mapped_file_get_contents(mapped_file) + sizeof(*header);
 412         if (be32toh(header->magic) != CTF_INDEX_MAGIC) {
 413                 BT_LOGW("Invalid LTTng trace index: \"magic\" validation failed");
 414                 goto error;
 415         }
 416
 417         file_index_entry_size = be32toh(header->packet_index_len);
 418         file_entry_count = (filesize - sizeof(*header)) / file_index_entry_size;
 419         if ((filesize - sizeof(*header)) % file_index_entry_size) {
 420                 BT_LOGW("Invalid index file size; not a multiple of index entry size");
 421                 goto error;
 422         }
 423
 424         index = ctf_fs_ds_index_create(file_entry_count);
 425         if (!index) {
 426                 goto error;
 427         }
 428
 429         index_entry = (struct ctf_fs_ds_index_entry *) &g_array_index(
 430                         index->entries, struct ctf_fs_ds_index_entry, 0);
 431         for (i = 0; i < file_entry_count; i++) {
 432                 struct ctf_packet_index *file_index =
 433                                 (struct ctf_packet_index *) file_pos;
 434                 uint64_t packet_size = be64toh(file_index->packet_size);
 435
 436                 if (packet_size % CHAR_BIT) {
 437                         BT_LOGW("Invalid packet size encountered in index file");
 438                         goto error;
 439                 }
 440
 441                 /* Convert size in bits to bytes. */
 442                 packet_size /= CHAR_BIT;
 443                 index_entry->packet_size = packet_size;
 444
 445                 index_entry->offset = be64toh(file_index->offset);
 446                 if (i != 0 && index_entry->offset < (index_entry - 1)->offset) {
 447                         BT_LOGW("Invalid, non-monotonic, packet offset encountered in index file");
 448                         goto error;
 449                 }
 450
 451                 index_entry->timestamp_begin = be64toh(file_index->timestamp_begin);
 452                 index_entry->timestamp_end = be64toh(file_index->timestamp_end);
 453                 if (index_entry->timestamp_end < index_entry->timestamp_begin) {
 454                         BT_LOGW("Invalid packet time bounds encountered in index file");
 455                         goto error;
 456                 }
 457
 458                 /* Convert the packet's bound to nanoseconds since Epoch. */
 459                 ret = convert_cycles_to_ns(timestamp_begin_cc,
 460                                 index_entry->timestamp_begin,
 461                                 &index_entry->timestamp_begin_ns);
 462                 if (ret) {
 463                         goto error;
 464                 }
 465                 ret = convert_cycles_to_ns(timestamp_end_cc,
 466                                 index_entry->timestamp_end,
 467                                 &index_entry->timestamp_end_ns);
 468                 if (ret) {
 469                         goto error;
 470                 }
 471
 472                 total_packets_size += packet_size;
 473                 file_pos += file_index_entry_size;
 474                 index_entry++;
 475         }
 476
 477         /* Validate that the index addresses the complete stream. */
 478         if (ds_file->file->size != total_packets_size) {
 479                 BT_LOGW("Invalid index; indexed size != stream file size");
 480                 goto error;
 481         }
 482 end:
 483         g_free(directory);
 484         g_free(basename);
 485         g_free(index_file_path);
 486         if (index_basename) {
 487                 g_string_free(index_basename, TRUE);
 488         }
 489         if (mapped_file) {
 490                 g_mapped_file_unref(mapped_file);
 491         }
 492         bt_put(timestamp_begin_cc);
 493         bt_put(timestamp_end_cc);
 494         return index;
 495 error:
 496         ctf_fs_ds_index_destroy(index);
 497         index = NULL;
 498         goto end;
 499 }
 500
 501 BT_HIDDEN
 502 struct ctf_fs_ds_file *ctf_fs_ds_file_create(
 503                 struct ctf_fs_trace *ctf_fs_trace,
 504                 struct bt_ctf_stream *stream, const char *path)
 505 {
 506         int ret;
 507         const size_t page_size = bt_common_get_page_size();
 508         struct ctf_fs_ds_file *ds_file = g_new0(struct ctf_fs_ds_file, 1);
 509
 510         if (!ds_file) {
 511                 goto error;
 512         }
 513
 514         ds_file->file = ctf_fs_file_create();
 515         if (!ds_file->file) {
 516                 goto error;
 517         }
 518
 519         ds_file->stream = bt_get(stream);
 520         ds_file->cc_prio_map = bt_get(ctf_fs_trace->cc_prio_map);
 521         g_string_assign(ds_file->file->path, path);
 522         ret = ctf_fs_file_open(ds_file->file, "rb");
 523         if (ret) {
 524                 goto error;
 525         }
 526
 527         ds_file->notif_iter = bt_ctf_notif_iter_create(
 528                 ctf_fs_trace->metadata->trace, page_size, medops, ds_file);
 529         if (!ds_file->notif_iter) {
 530                 goto error;
 531         }
 532
 533         ds_file->mmap_max_len = page_size * 2048;
 534
 535         goto end;
 536
 537 error:
 538         /* Do not touch "borrowed" file. */
 539         ctf_fs_ds_file_destroy(ds_file);
 540         ds_file = NULL;
 541
 542 end:
 543         return ds_file;
 544 }
 545
 546 BT_HIDDEN
 547 struct ctf_fs_ds_index *ctf_fs_ds_file_build_index(
 548                 struct ctf_fs_ds_file *ds_file)
 549 {
 550         return build_index_from_idx_file(ds_file);
 551 }
 552
 553 BT_HIDDEN
 554 void ctf_fs_ds_file_destroy(struct ctf_fs_ds_file *ds_file)
 555 {
 556         if (!ds_file) {
 557                 return;
 558         }
 559
 560         bt_put(ds_file->cc_prio_map);
 561         bt_put(ds_file->stream);
 562         (void) ds_file_munmap(ds_file);
 563
 564         if (ds_file->file) {
 565                 ctf_fs_file_destroy(ds_file->file);
 566         }
 567
 568         if (ds_file->notif_iter) {
 569                 bt_ctf_notif_iter_destroy(ds_file->notif_iter);
 570         }
 571
 572         g_free(ds_file);
 573 }
 574
 575 BT_HIDDEN
 576 struct bt_notification_iterator_next_return ctf_fs_ds_file_next(
 577                 struct ctf_fs_ds_file *ds_file)
 578 {
 579         enum bt_ctf_notif_iter_status notif_iter_status;
 580         struct bt_notification_iterator_next_return ret = {
 581                 .status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR,
 582                 .notification = NULL,
 583         };
 584
 585         notif_iter_status = bt_ctf_notif_iter_get_next_notification(
 586                 ds_file->notif_iter, ds_file->cc_prio_map, &ret.notification);
 587
 588         switch (notif_iter_status) {
 589         case BT_CTF_NOTIF_ITER_STATUS_EOF:
 590                 ret.status = BT_NOTIFICATION_ITERATOR_STATUS_END;
 591                 break;
 592         case BT_CTF_NOTIF_ITER_STATUS_OK:
 593                 ret.status = BT_NOTIFICATION_ITERATOR_STATUS_OK;
 594                 break;
 595         case BT_CTF_NOTIF_ITER_STATUS_AGAIN:
 596                 /*
 597                  * Should not make it this far as this is
 598                  * medium-specific; there is nothing for the user to do
 599                  * and it should have been handled upstream.
 600                  */
 601                 abort();
 602         case BT_CTF_NOTIF_ITER_STATUS_INVAL:
 603         case BT_CTF_NOTIF_ITER_STATUS_ERROR:
 604         default:
 605                 ret.status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
 606                 break;
 607         }
 608
 609         return ret;
 610 }
 611
 612 BT_HIDDEN
 613 int ctf_fs_ds_file_get_packet_header_context_fields(
 614                 struct ctf_fs_ds_file *ds_file,
 615                 struct bt_ctf_field **packet_header_field,
 616                 struct bt_ctf_field **packet_context_field)
 617 {
 618         enum bt_ctf_notif_iter_status notif_iter_status;
 619         int ret = 0;
 620
 621         assert(ds_file);
 622         notif_iter_status = bt_ctf_notif_iter_get_packet_header_context_fields(
 623                 ds_file->notif_iter, packet_header_field, packet_context_field);
 624         switch (notif_iter_status) {
 625         case BT_CTF_NOTIF_ITER_STATUS_EOF:
 626         case BT_CTF_NOTIF_ITER_STATUS_OK:
 627                 break;
 628         case BT_CTF_NOTIF_ITER_STATUS_AGAIN:
 629                 abort();
 630         case BT_CTF_NOTIF_ITER_STATUS_INVAL:
 631         case BT_CTF_NOTIF_ITER_STATUS_ERROR:
 632         default:
 633                 goto error;
 634                 break;
 635         }
 636
 637         goto end;
 638
 639 error:
 640         ret = -1;
 641
 642         if (packet_header_field) {
 643                 bt_put(*packet_header_field);
 644         }
 645
 646         if (packet_context_field) {
 647                 bt_put(*packet_context_field);
 648         }
 649
 650 end:
 651         return ret;
 652 }
 653
 654 BT_HIDDEN
 655 void ctf_fs_ds_index_destroy(struct ctf_fs_ds_index *index)
 656 {
 657         if (!index) {
 658                 return;
 659         }
 660
 661         if (index->entries) {
 662                 g_array_free(index->entries, TRUE);
 663         }
 664         g_free(index);
 665 }