move content of struct field into struct definition
[babeltrace.git] / formats / ctf / ctf.c
CommitLineData
fc93b2bd
MD
1/*
2 * BabelTrace - Common Trace Format (CTF)
3 *
4 * Format registration.
5 *
c054553d 6 * Copyright 2010, 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
fc93b2bd 7 *
ccd7e1c8
MD
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
fc93b2bd 14 *
ccd7e1c8
MD
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
fc93b2bd
MD
17 */
18
19#include <babeltrace/format.h>
20#include <babeltrace/ctf/types.h>
bbefb8dd 21#include <babeltrace/ctf/metadata.h>
65102a8c 22#include <babeltrace/babeltrace.h>
0f980a35
MD
23#include <inttypes.h>
24#include <uuid/uuid.h>
25#include <sys/mman.h>
bbefb8dd 26#include <errno.h>
bbefb8dd 27#include <sys/types.h>
65102a8c 28#include <sys/stat.h>
bbefb8dd 29#include <fcntl.h>
65102a8c 30#include <dirent.h>
bbefb8dd 31#include <glib.h>
65102a8c
MD
32#include <unistd.h>
33#include <stdlib.h>
34
65102a8c
MD
35#include "metadata/ctf-scanner.h"
36#include "metadata/ctf-parser.h"
37#include "metadata/ctf-ast.h"
38
0f980a35
MD
39/*
40 * We currently simply map a page to read the packet header and packet
8c572eba 41 * context to get the packet length and content length. (in bits)
0f980a35 42 */
8c572eba
MD
43#define MAX_PACKET_HEADER_LEN (getpagesize() * CHAR_BIT)
44#define WRITE_PACKET_LEN (getpagesize() * 8 * CHAR_BIT)
0f980a35
MD
45#define UUID_LEN 16 /* uuid by value len */
46
65102a8c 47extern int yydebug;
bbefb8dd 48
bbefb8dd
MD
49struct trace_descriptor *ctf_open_trace(const char *path, int flags);
50void ctf_close_trace(struct trace_descriptor *descriptor);
fc93b2bd 51
1ae19169
MD
52static
53rw_dispatch read_dispatch_table[] = {
d11e9c49
MD
54 [ CTF_TYPE_INTEGER ] = ctf_integer_read,
55 [ CTF_TYPE_FLOAT ] = ctf_float_read,
56 [ CTF_TYPE_ENUM ] = ctf_enum_read,
57 [ CTF_TYPE_STRING ] = ctf_string_read,
58 [ CTF_TYPE_STRUCT ] = ctf_struct_rw,
59 [ CTF_TYPE_VARIANT ] = ctf_variant_rw,
60 [ CTF_TYPE_ARRAY ] = ctf_array_rw,
61 [ CTF_TYPE_SEQUENCE ] = ctf_sequence_rw,
62};
63
1ae19169
MD
64static
65rw_dispatch write_dispatch_table[] = {
d11e9c49
MD
66 [ CTF_TYPE_INTEGER ] = ctf_integer_write,
67 [ CTF_TYPE_FLOAT ] = ctf_float_write,
68 [ CTF_TYPE_ENUM ] = ctf_enum_write,
69 [ CTF_TYPE_STRING ] = ctf_string_write,
70 [ CTF_TYPE_STRUCT ] = ctf_struct_rw,
71 [ CTF_TYPE_VARIANT ] = ctf_variant_rw,
72 [ CTF_TYPE_ARRAY ] = ctf_array_rw,
73 [ CTF_TYPE_SEQUENCE ] = ctf_sequence_rw,
74};
75
1ae19169 76static
d11e9c49 77struct format ctf_format = {
bbefb8dd
MD
78 .open_trace = ctf_open_trace,
79 .close_trace = ctf_close_trace,
fc93b2bd
MD
80};
81
8563e754 82void ctf_init_pos(struct ctf_stream_pos *pos, int fd, int open_flags)
8c572eba
MD
83{
84 pos->fd = fd;
85 pos->mmap_offset = 0;
86 pos->packet_size = 0;
87 pos->content_size = 0;
88 pos->content_size_loc = NULL;
89 pos->base = NULL;
90 pos->offset = 0;
91 pos->dummy = false;
8c572eba 92 pos->cur_index = 0;
8563e754
MD
93 if (fd >= 0)
94 pos->packet_index = g_array_new(FALSE, TRUE,
95 sizeof(struct packet_index));
96 else
97 pos->packet_index = NULL;
8563e754
MD
98 switch (open_flags & O_ACCMODE) {
99 case O_RDONLY:
100 pos->prot = PROT_READ;
101 pos->flags = MAP_PRIVATE;
102 pos->parent.rw_table = read_dispatch_table;
103 break;
8563e754
MD
104 case O_RDWR:
105 pos->prot = PROT_WRITE; /* Write has priority */
106 pos->flags = MAP_SHARED;
107 pos->parent.rw_table = write_dispatch_table;
108 if (fd >= 0)
847bf71a 109 ctf_move_pos_slow(pos, 0, SEEK_SET); /* position for write */
8563e754
MD
110 break;
111 default:
112 assert(0);
8c572eba
MD
113 }
114}
115
46322b33 116void ctf_fini_pos(struct ctf_stream_pos *pos)
8c572eba
MD
117{
118 int ret;
119
120 if (pos->prot == PROT_WRITE && pos->content_size_loc)
121 *pos->content_size_loc = pos->offset;
122 if (pos->base) {
123 /* unmap old base */
124 ret = munmap(pos->base, pos->packet_size / CHAR_BIT);
125 if (ret) {
46322b33 126 fprintf(stdout, "[error] Unable to unmap old base: %s.\n",
8c572eba
MD
127 strerror(errno));
128 assert(0);
129 }
130 }
131 (void) g_array_free(pos->packet_index, TRUE);
132}
133
847bf71a 134void ctf_move_pos_slow(struct ctf_stream_pos *pos, size_t offset, int whence)
0f980a35
MD
135{
136 int ret;
8c572eba
MD
137 off_t off;
138 struct packet_index *index;
0f980a35 139
8c572eba
MD
140 if (pos->prot == PROT_WRITE && pos->content_size_loc)
141 *pos->content_size_loc = pos->offset;
0f980a35
MD
142
143 if (pos->base) {
144 /* unmap old base */
8c572eba 145 ret = munmap(pos->base, pos->packet_size / CHAR_BIT);
0f980a35 146 if (ret) {
46322b33 147 fprintf(stdout, "[error] Unable to unmap old base: %s.\n",
0f980a35
MD
148 strerror(errno));
149 assert(0);
150 }
847bf71a 151 pos->base = NULL;
0f980a35
MD
152 }
153
8c572eba 154 /*
46322b33 155 * The caller should never ask for ctf_move_pos across packets,
8c572eba
MD
156 * except to get exactly at the beginning of the next packet.
157 */
158 if (pos->prot == PROT_WRITE) {
989c73bc
MD
159 switch (whence) {
160 case SEEK_CUR:
161 /* The writer will add padding */
162 assert(pos->offset + offset == pos->packet_size);
8c572eba 163 pos->mmap_offset += WRITE_PACKET_LEN / CHAR_BIT;
989c73bc
MD
164 break;
165 case SEEK_SET:
166 assert(offset == 0); /* only seek supported for now */
167 pos->cur_index = 0;
168 break;
169 default:
170 assert(0);
171 }
8c572eba
MD
172 pos->content_size = -1U; /* Unknown at this point */
173 pos->packet_size = WRITE_PACKET_LEN;
989c73bc
MD
174 off = posix_fallocate(pos->fd, pos->mmap_offset,
175 pos->packet_size / CHAR_BIT);
8c572eba 176 assert(off >= 0);
847bf71a 177 pos->offset = 0;
8c572eba 178 } else {
847bf71a
MD
179 switch (whence) {
180 case SEEK_CUR:
181 /* The reader will expect us to skip padding */
182 assert(pos->offset + offset == pos->content_size);
8c572eba 183 ++pos->cur_index;
847bf71a
MD
184 break;
185 case SEEK_SET:
186 assert(offset == 0); /* only seek supported for now */
187 pos->cur_index = 0;
188 break;
189 default:
190 assert(0);
191 }
192 if (pos->cur_index >= pos->packet_index->len) {
670977d3 193 pos->offset = EOF;
847bf71a
MD
194 return;
195 }
8c572eba
MD
196 index = &g_array_index(pos->packet_index, struct packet_index,
197 pos->cur_index);
198 pos->mmap_offset = index->offset;
199
200 /* Lookup context/packet size in index */
201 pos->content_size = index->content_size;
202 pos->packet_size = index->packet_size;
847bf71a 203 pos->offset = index->data_offset;
8c572eba 204 }
0f980a35 205 /* map new base. Need mapping length from header. */
8c572eba
MD
206 pos->base = mmap(NULL, pos->packet_size / CHAR_BIT, pos->prot,
207 pos->flags, pos->fd, pos->mmap_offset);
847bf71a
MD
208 if (pos->base == MAP_FAILED) {
209 fprintf(stdout, "[error] mmap error %s.\n",
210 strerror(errno));
211 assert(0);
212 }
0f980a35
MD
213}
214
65102a8c
MD
215/*
216 * TODO: for now, we treat the metadata file as a simple text file
217 * (without any header nor packets nor padding).
218 */
219static
46322b33 220int ctf_open_trace_metadata_read(struct ctf_trace *td)
65102a8c
MD
221{
222 struct ctf_scanner *scanner;
223 FILE *fp;
224 int ret = 0;
225
46322b33
MD
226 td->metadata.pos.fd = openat(td->dirfd, "metadata", O_RDONLY);
227 if (td->metadata.pos.fd < 0) {
65102a8c 228 fprintf(stdout, "Unable to open metadata.\n");
46322b33 229 return td->metadata.pos.fd;
65102a8c
MD
230 }
231
232 if (babeltrace_debug)
233 yydebug = 1;
234
46322b33 235 fp = fdopen(td->metadata.pos.fd, "r");
65102a8c 236 if (!fp) {
46322b33 237 fprintf(stdout, "[error] Unable to open metadata stream.\n");
65102a8c
MD
238 ret = -errno;
239 goto end_stream;
240 }
241
242 scanner = ctf_scanner_alloc(fp);
243 if (!scanner) {
46322b33 244 fprintf(stdout, "[error] Error allocating scanner\n");
65102a8c
MD
245 ret = -ENOMEM;
246 goto end_scanner_alloc;
247 }
248 ret = ctf_scanner_append_ast(scanner);
249 if (ret) {
46322b33 250 fprintf(stdout, "[error] Error creating AST\n");
65102a8c
MD
251 goto end;
252 }
253
254 if (babeltrace_debug) {
255 ret = ctf_visitor_print_xml(stdout, 0, &scanner->ast->root);
256 if (ret) {
46322b33 257 fprintf(stdout, "[error] Error visiting AST for XML output\n");
65102a8c
MD
258 goto end;
259 }
260 }
261
262 ret = ctf_visitor_semantic_check(stdout, 0, &scanner->ast->root);
263 if (ret) {
46322b33 264 fprintf(stdout, "[error] Error in CTF semantic validation %d\n", ret);
65102a8c
MD
265 goto end;
266 }
267 ret = ctf_visitor_construct_metadata(stdout, 0, &scanner->ast->root,
46322b33 268 td, BYTE_ORDER);
65102a8c 269 if (ret) {
46322b33 270 fprintf(stdout, "[error] Error in CTF metadata constructor %d\n", ret);
65102a8c
MD
271 goto end;
272 }
273end:
274 ctf_scanner_free(scanner);
275end_scanner_alloc:
276 fclose(fp);
277end_stream:
46322b33 278 close(td->metadata.pos.fd);
0f980a35
MD
279 return ret;
280}
281
282
283static
46322b33 284int create_stream_packet_index(struct ctf_trace *td,
0f980a35
MD
285 struct ctf_file_stream *file_stream)
286{
287 struct ctf_stream *stream;
288 int len_index;
46322b33 289 struct ctf_stream_pos *pos;
0f980a35
MD
290 struct stat filestats;
291 struct packet_index packet_index;
292 int first_packet = 1;
293 int ret;
294
295 pos = &file_stream->pos;
296
297 ret = fstat(pos->fd, &filestats);
298 if (ret < 0)
299 return ret;
300
301 for (pos->mmap_offset = 0; pos->mmap_offset < filestats.st_size; ) {
302 uint64_t stream_id = 0;
303
304 if (pos->base) {
305 /* unmap old base */
8c572eba 306 ret = munmap(pos->base, pos->packet_size / CHAR_BIT);
0f980a35 307 if (ret) {
46322b33 308 fprintf(stdout, "[error] Unable to unmap old base: %s.\n",
0f980a35
MD
309 strerror(errno));
310 return ret;
311 }
8c572eba 312 pos->base = NULL;
0f980a35
MD
313 }
314 /* map new base. Need mapping length from header. */
8c572eba 315 pos->base = mmap(NULL, MAX_PACKET_HEADER_LEN / CHAR_BIT, PROT_READ,
0f980a35 316 MAP_PRIVATE, pos->fd, pos->mmap_offset);
dc48ecad
MD
317 pos->content_size = MAX_PACKET_HEADER_LEN; /* Unknown at this point */
318 pos->packet_size = MAX_PACKET_HEADER_LEN; /* Unknown at this point */
0f980a35
MD
319 pos->offset = 0; /* Position of the packet header */
320
8c572eba
MD
321 packet_index.offset = pos->mmap_offset;
322 packet_index.content_size = 0;
323 packet_index.packet_size = 0;
324
0f980a35 325 /* read and check header, set stream id (and check) */
46322b33 326 if (td->packet_header) {
0f980a35 327 /* Read packet header */
c5e74408
MD
328 ret = generic_rw(&pos->parent, &td->packet_header->p);
329 if (ret)
330 return ret;
46322b33 331 len_index = struct_declaration_lookup_field_index(td->packet_header->declaration, g_quark_from_static_string("magic"));
0f980a35
MD
332 if (len_index >= 0) {
333 struct definition_integer *defint;
b1a2f580 334 struct definition *field;
0f980a35 335
46322b33 336 field = struct_definition_get_field_from_index(td->packet_header, len_index);
b1a2f580
MD
337 assert(field->declaration->id == CTF_TYPE_INTEGER);
338 defint = container_of(field, struct definition_integer, p);
0f980a35
MD
339 assert(defint->declaration->signedness == FALSE);
340 if (defint->value._unsigned != CTF_MAGIC) {
d8ea2d29 341 fprintf(stdout, "[error] Invalid magic number 0x%" PRIX64 " at packet %u (file offset %zd).\n",
8c572eba
MD
342 defint->value._unsigned,
343 file_stream->pos.packet_index->len,
344 (ssize_t) pos->mmap_offset);
0f980a35
MD
345 return -EINVAL;
346 }
347 }
348
349 /* check uuid */
46322b33 350 len_index = struct_declaration_lookup_field_index(td->packet_header->declaration, g_quark_from_static_string("trace_uuid"));
0f980a35
MD
351 if (len_index >= 0) {
352 struct definition_array *defarray;
b1a2f580 353 struct definition *field;
0f980a35
MD
354 uint64_t i;
355 uint8_t uuidval[UUID_LEN];
356
46322b33 357 field = struct_definition_get_field_from_index(td->packet_header, len_index);
b1a2f580
MD
358 assert(field->declaration->id == CTF_TYPE_ARRAY);
359 defarray = container_of(field, struct definition_array, p);
3838df27 360 assert(array_len(defarray) == UUID_LEN);
0f980a35
MD
361 assert(defarray->declaration->elem->id == CTF_TYPE_INTEGER);
362
363 for (i = 0; i < UUID_LEN; i++) {
364 struct definition *elem;
365 struct definition_integer *defint;
366
367 elem = array_index(defarray, i);
368 assert(elem);
369 defint = container_of(elem, struct definition_integer, p);
370 uuidval[i] = defint->value._unsigned;
371 }
46322b33 372 ret = uuid_compare(td->uuid, uuidval);
0f980a35
MD
373 if (ret) {
374 fprintf(stdout, "[error] Unique Universal Identifiers do not match.\n");
375 return -EINVAL;
376 }
377 }
378
379
46322b33 380 len_index = struct_declaration_lookup_field_index(td->packet_header->declaration, g_quark_from_static_string("stream_id"));
0f980a35
MD
381 if (len_index >= 0) {
382 struct definition_integer *defint;
b1a2f580 383 struct definition *field;
0f980a35 384
46322b33 385 field = struct_definition_get_field_from_index(td->packet_header, len_index);
b1a2f580
MD
386 assert(field->declaration->id == CTF_TYPE_INTEGER);
387 defint = container_of(field, struct definition_integer, p);
0f980a35
MD
388 assert(defint->declaration->signedness == FALSE);
389 stream_id = defint->value._unsigned;
390 }
391 }
392
393 if (!first_packet && file_stream->stream_id != stream_id) {
394 fprintf(stdout, "[error] Stream ID is changing within a stream.\n");
395 return -EINVAL;
396 }
397 if (first_packet) {
398 file_stream->stream_id = stream_id;
46322b33 399 if (stream_id >= td->streams->len) {
0f980a35
MD
400 fprintf(stdout, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
401 return -EINVAL;
402 }
46322b33 403 stream = g_ptr_array_index(td->streams, stream_id);
0f980a35
MD
404 if (!stream) {
405 fprintf(stdout, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
406 return -EINVAL;
407 }
408 file_stream->stream = stream;
409 }
410 first_packet = 0;
411
dc48ecad
MD
412 if (stream->packet_context) {
413 /* Read packet context */
c5e74408
MD
414 ret = generic_rw(&pos->parent, &stream->packet_context->p);
415 if (ret)
416 return ret;
dc48ecad
MD
417 /* read content size from header */
418 len_index = struct_declaration_lookup_field_index(stream->packet_context->declaration, g_quark_from_static_string("content_size"));
419 if (len_index >= 0) {
420 struct definition_integer *defint;
b1a2f580 421 struct definition *field;
dc48ecad
MD
422
423 field = struct_definition_get_field_from_index(stream->packet_context, len_index);
b1a2f580
MD
424 assert(field->declaration->id == CTF_TYPE_INTEGER);
425 defint = container_of(field, struct definition_integer, p);
dc48ecad 426 assert(defint->declaration->signedness == FALSE);
8c572eba 427 packet_index.content_size = defint->value._unsigned;
dc48ecad
MD
428 } else {
429 /* Use file size for packet size */
8c572eba 430 packet_index.content_size = filestats.st_size * CHAR_BIT;
dc48ecad
MD
431 }
432
433 /* read packet size from header */
434 len_index = struct_declaration_lookup_field_index(stream->packet_context->declaration, g_quark_from_static_string("packet_size"));
435 if (len_index >= 0) {
436 struct definition_integer *defint;
b1a2f580 437 struct definition *field;
dc48ecad
MD
438
439 field = struct_definition_get_field_from_index(stream->packet_context, len_index);
b1a2f580
MD
440 assert(field->declaration->id == CTF_TYPE_INTEGER);
441 defint = container_of(field, struct definition_integer, p);
dc48ecad 442 assert(defint->declaration->signedness == FALSE);
8c572eba 443 packet_index.packet_size = defint->value._unsigned;
dc48ecad
MD
444 } else {
445 /* Use content size if non-zero, else file size */
8c572eba 446 packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT;
dc48ecad 447 }
0f980a35
MD
448 } else {
449 /* Use file size for packet size */
8c572eba 450 packet_index.content_size = filestats.st_size * CHAR_BIT;
0f980a35 451 /* Use content size if non-zero, else file size */
8c572eba 452 packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT;
0f980a35 453 }
546293fa
MD
454
455 /* Validate content size and packet size values */
456 if (packet_index.content_size > packet_index.packet_size) {
457 fprintf(stdout, "[error] Content size (%zu bits) is larger than packet size (%zu bits).\n",
458 packet_index.content_size, packet_index.packet_size);
459 return -EINVAL;
460 }
461
58b0b883
MD
462 if (packet_index.packet_size > (filestats.st_size - packet_index.offset) * CHAR_BIT) {
463 fprintf(stdout, "[error] Packet size (%zu bits) is larger than remaining file size (%zu bits).\n",
464 packet_index.content_size, (filestats.st_size - packet_index.offset) * CHAR_BIT);
546293fa
MD
465 return -EINVAL;
466 }
467
847bf71a
MD
468 /* Save position after header and context */
469 packet_index.data_offset = pos->offset;
0f980a35 470
0f980a35
MD
471 /* add index to packet array */
472 g_array_append_val(file_stream->pos.packet_index, packet_index);
473
8c572eba 474 pos->mmap_offset += packet_index.packet_size / CHAR_BIT;
0f980a35
MD
475 }
476
847bf71a
MD
477 /* Move pos back to beginning of file */
478 ctf_move_pos_slow(pos, 0, SEEK_SET); /* position for write */
479
0f980a35
MD
480 return 0;
481}
482
483/*
484 * Note: many file streams can inherit from the same stream class
485 * description (metadata).
486 */
487static
46322b33 488int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags)
0f980a35
MD
489{
490 int ret;
491 struct ctf_file_stream *file_stream;
492
46322b33 493 ret = openat(td->dirfd, path, flags);
0f980a35
MD
494 if (ret < 0)
495 goto error;
496 file_stream = g_new0(struct ctf_file_stream, 1);
8563e754 497 ctf_init_pos(&file_stream->pos, ret, flags);
0f980a35
MD
498 ret = create_stream_packet_index(td, file_stream);
499 if (ret)
500 goto error_index;
501 /* Add stream file to stream class */
502 g_ptr_array_add(file_stream->stream->files, file_stream);
503 return 0;
504
505error_index:
46322b33 506 ctf_fini_pos(&file_stream->pos);
0f980a35
MD
507 close(file_stream->pos.fd);
508 g_free(file_stream);
509error:
65102a8c
MD
510 return ret;
511}
512
bbefb8dd 513static
46322b33 514int ctf_open_trace_read(struct ctf_trace *td, const char *path, int flags)
bbefb8dd
MD
515{
516 int ret;
65102a8c
MD
517 struct dirent *dirent;
518 struct dirent *diriter;
519 size_t dirent_len;
bbefb8dd 520
46322b33 521 td->flags = flags;
bbefb8dd
MD
522
523 /* Open trace directory */
46322b33
MD
524 td->dir = opendir(path);
525 if (!td->dir) {
dc48ecad 526 fprintf(stdout, "[error] Unable to open trace directory.\n");
bbefb8dd
MD
527 ret = -ENOENT;
528 goto error;
529 }
530
46322b33
MD
531 td->dirfd = open(path, 0);
532 if (td->dirfd < 0) {
dc48ecad 533 fprintf(stdout, "[error] Unable to open trace directory file descriptor.\n");
65102a8c
MD
534 ret = -ENOENT;
535 goto error_dirfd;
536 }
0f980a35 537
46322b33 538 td->streams = g_ptr_array_new();
0f980a35 539
65102a8c
MD
540 /*
541 * Keep the metadata file separate.
542 */
bbefb8dd 543
65102a8c
MD
544 ret = ctf_open_trace_metadata_read(td);
545 if (ret) {
546 goto error_metadata;
547 }
bbefb8dd
MD
548
549 /*
550 * Open each stream: for each file, try to open, check magic
551 * number, and get the stream ID to add to the right location in
552 * the stream array.
bbefb8dd
MD
553 */
554
65102a8c 555 dirent_len = offsetof(struct dirent, d_name) +
46322b33 556 fpathconf(td->dirfd, _PC_NAME_MAX) + 1;
bbefb8dd 557
65102a8c 558 dirent = malloc(dirent_len);
bbefb8dd 559
65102a8c 560 for (;;) {
46322b33 561 ret = readdir_r(td->dir, dirent, &diriter);
65102a8c 562 if (ret) {
dc48ecad 563 fprintf(stdout, "[error] Readdir error.\n");
65102a8c 564 goto readdir_error;
65102a8c
MD
565 }
566 if (!diriter)
567 break;
d8ea2d29
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568 /* Ignore hidden files, ., .. and metadata. */
569 if (!strncmp(diriter->d_name, ".", 1)
65102a8c
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570 || !strcmp(diriter->d_name, "..")
571 || !strcmp(diriter->d_name, "metadata"))
572 continue;
dc48ecad
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573 ret = ctf_open_file_stream_read(td, diriter->d_name, flags);
574 if (ret) {
575 fprintf(stdout, "[error] Open file stream error.\n");
576 goto readdir_error;
577 }
65102a8c 578 }
bbefb8dd 579
65102a8c 580 free(dirent);
bbefb8dd 581 return 0;
65102a8c
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582
583readdir_error:
584 free(dirent);
585error_metadata:
46322b33
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586 g_ptr_array_free(td->streams, TRUE);
587 close(td->dirfd);
65102a8c 588error_dirfd:
46322b33 589 closedir(td->dir);
bbefb8dd
MD
590error:
591 return ret;
592}
593
bbefb8dd
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594struct trace_descriptor *ctf_open_trace(const char *path, int flags)
595{
46322b33 596 struct ctf_trace *td;
bbefb8dd
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597 int ret;
598
46322b33 599 td = g_new0(struct ctf_trace, 1);
bbefb8dd 600
8c572eba 601 switch (flags & O_ACCMODE) {
bbefb8dd 602 case O_RDONLY:
b61922b5
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603 if (!path) {
604 fprintf(stdout, "[error] Path missing for input CTF trace.\n");
605 goto error;
606 }
bbefb8dd
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607 ret = ctf_open_trace_read(td, path, flags);
608 if (ret)
609 goto error;
610 break;
989c73bc 611 case O_RDWR:
46322b33
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612 fprintf(stdout, "[error] Opening CTF traces for output is not supported yet.\n");
613 goto error;
bbefb8dd 614 default:
46322b33 615 fprintf(stdout, "[error] Incorrect open flags.\n");
bbefb8dd
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616 goto error;
617 }
618
46322b33 619 return &td->parent;
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620error:
621 g_free(td);
622 return NULL;
623}
624
0f980a35
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625static
626void ctf_close_file_stream(struct ctf_file_stream *file_stream)
627{
46322b33 628 ctf_fini_pos(&file_stream->pos);
0f980a35
MD
629 close(file_stream->pos.fd);
630}
631
46322b33 632void ctf_close_trace(struct trace_descriptor *tdp)
bbefb8dd 633{
46322b33 634 struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
0f980a35
MD
635 int i;
636
46322b33
MD
637 if (td->streams) {
638 for (i = 0; i < td->streams->len; i++) {
0f980a35
MD
639 struct ctf_stream *stream;
640 int j;
46322b33 641 stream = g_ptr_array_index(td->streams, i);
0f980a35
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642 for (j = 0; j < stream->files->len; j++) {
643 struct ctf_file_stream *file_stream;
2c117823 644 file_stream = g_ptr_array_index(stream->files, j);
0f980a35
MD
645 ctf_close_file_stream(file_stream);
646 }
647
648 }
46322b33 649 g_ptr_array_free(td->streams, TRUE);
0f980a35 650 }
46322b33 651 closedir(td->dir);
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652 g_free(td);
653}
654
7fb21036 655void __attribute__((constructor)) ctf_init(void)
fc93b2bd
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656{
657 int ret;
658
4c8bfb7e 659 ctf_format.name = g_quark_from_static_string("ctf");
fc93b2bd
MD
660 ret = bt_register_format(&ctf_format);
661 assert(!ret);
662}
698f0fe4
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663
664/* TODO: finalize */
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