Commit | Line | Data |
---|---|---|
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 | 47 | extern int yydebug; |
bbefb8dd | 48 | |
bbefb8dd MD |
49 | struct trace_descriptor *ctf_open_trace(const char *path, int flags); |
50 | void ctf_close_trace(struct trace_descriptor *descriptor); | |
fc93b2bd | 51 | |
1ae19169 MD |
52 | static |
53 | rw_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 |
64 | static |
65 | rw_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 | 76 | static |
d11e9c49 | 77 | struct format ctf_format = { |
bbefb8dd MD |
78 | .open_trace = ctf_open_trace, |
79 | .close_trace = ctf_close_trace, | |
fc93b2bd MD |
80 | }; |
81 | ||
8563e754 | 82 | void 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 | 116 | void 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 | 134 | void 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 | */ | |
219 | static | |
46322b33 | 220 | int 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 | } | |
273 | end: | |
274 | ctf_scanner_free(scanner); | |
275 | end_scanner_alloc: | |
276 | fclose(fp); | |
277 | end_stream: | |
46322b33 | 278 | close(td->metadata.pos.fd); |
0f980a35 MD |
279 | return ret; |
280 | } | |
281 | ||
282 | ||
283 | static | |
46322b33 | 284 | int 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; | |
334 | struct field *field; | |
335 | ||
46322b33 | 336 | field = struct_definition_get_field_from_index(td->packet_header, len_index); |
0f980a35 MD |
337 | assert(field->definition->declaration->id == CTF_TYPE_INTEGER); |
338 | defint = container_of(field->definition, struct definition_integer, p); | |
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; | |
353 | struct field *field; | |
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); |
0f980a35 MD |
358 | assert(field->definition->declaration->id == CTF_TYPE_ARRAY); |
359 | defarray = container_of(field->definition, 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; | |
383 | struct field *field; | |
384 | ||
46322b33 | 385 | field = struct_definition_get_field_from_index(td->packet_header, len_index); |
0f980a35 MD |
386 | assert(field->definition->declaration->id == CTF_TYPE_INTEGER); |
387 | defint = container_of(field->definition, struct definition_integer, p); | |
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; | |
421 | struct field *field; | |
422 | ||
423 | field = struct_definition_get_field_from_index(stream->packet_context, len_index); | |
424 | assert(field->definition->declaration->id == CTF_TYPE_INTEGER); | |
425 | defint = container_of(field->definition, struct definition_integer, p); | |
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; | |
437 | struct field *field; | |
438 | ||
439 | field = struct_definition_get_field_from_index(stream->packet_context, len_index); | |
440 | assert(field->definition->declaration->id == CTF_TYPE_INTEGER); | |
441 | defint = container_of(field->definition, struct definition_integer, p); | |
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 | */ | |
487 | static | |
46322b33 | 488 | int 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 | ||
505 | error_index: | |
46322b33 | 506 | ctf_fini_pos(&file_stream->pos); |
0f980a35 MD |
507 | close(file_stream->pos.fd); |
508 | g_free(file_stream); | |
509 | error: | |
65102a8c MD |
510 | return ret; |
511 | } | |
512 | ||
bbefb8dd | 513 | static |
46322b33 | 514 | int 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 MD |
568 | /* Ignore hidden files, ., .. and metadata. */ |
569 | if (!strncmp(diriter->d_name, ".", 1) | |
65102a8c MD |
570 | || !strcmp(diriter->d_name, "..") |
571 | || !strcmp(diriter->d_name, "metadata")) | |
572 | continue; | |
dc48ecad MD |
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 MD |
582 | |
583 | readdir_error: | |
584 | free(dirent); | |
585 | error_metadata: | |
46322b33 MD |
586 | g_ptr_array_free(td->streams, TRUE); |
587 | close(td->dirfd); | |
65102a8c | 588 | error_dirfd: |
46322b33 | 589 | closedir(td->dir); |
bbefb8dd MD |
590 | error: |
591 | return ret; | |
592 | } | |
593 | ||
bbefb8dd MD |
594 | struct trace_descriptor *ctf_open_trace(const char *path, int flags) |
595 | { | |
46322b33 | 596 | struct ctf_trace *td; |
bbefb8dd MD |
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 MD |
603 | if (!path) { |
604 | fprintf(stdout, "[error] Path missing for input CTF trace.\n"); | |
605 | goto error; | |
606 | } | |
bbefb8dd MD |
607 | ret = ctf_open_trace_read(td, path, flags); |
608 | if (ret) | |
609 | goto error; | |
610 | break; | |
989c73bc | 611 | case O_RDWR: |
46322b33 MD |
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 MD |
616 | goto error; |
617 | } | |
618 | ||
46322b33 | 619 | return &td->parent; |
bbefb8dd MD |
620 | error: |
621 | g_free(td); | |
622 | return NULL; | |
623 | } | |
624 | ||
0f980a35 MD |
625 | static |
626 | void 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 | 632 | void 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 MD |
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); |
bbefb8dd MD |
652 | g_free(td); |
653 | } | |
654 | ||
7fb21036 | 655 | void __attribute__((constructor)) ctf_init(void) |
fc93b2bd MD |
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 MD |
663 | |
664 | /* TODO: finalize */ |