Commit | Line | Data |
---|---|---|
2c5ff4e4 JG |
1 | /* |
2 | * Copyright (C) 2019 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * This library is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
6 | * as published by the Free Software Foundation. | |
7 | * | |
8 | * This library is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License | |
11 | * for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU Lesser General Public License | |
14 | * along with this library; if not, write to the Free Software Foundation, | |
15 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
16 | */ | |
17 | ||
18 | #include <lttng/constant.h> | |
19 | #include <common/string-utils/format.h> | |
20 | #include <common/trace-chunk.h> | |
21 | #include <common/trace-chunk-registry.h> | |
22 | #include <common/hashtable/utils.h> | |
23 | #include <common/hashtable/hashtable.h> | |
24 | #include <common/error.h> | |
25 | #include <common/utils.h> | |
26 | #include <common/time.h> | |
27 | #include <common/optional.h> | |
28 | #include <common/compat/directory-handle.h> | |
29 | #include <common/credentials.h> | |
30 | #include <common/defaults.h> | |
31 | #include <common/dynamic-array.h> | |
32 | ||
33 | #include <urcu/ref.h> | |
34 | #include <urcu/rculfhash.h> | |
35 | #include <sys/stat.h> | |
36 | #include <inttypes.h> | |
37 | #include <pthread.h> | |
38 | #include <stdio.h> | |
39 | ||
40 | /* | |
41 | * Two ISO 8601-compatible timestamps, separated by a hypen, followed an | |
42 | * index, i.e. <start-iso-8601>-<end-iso-8601>-<id-uint64_t>. | |
43 | */ | |
44 | #define GENERATED_CHUNK_NAME_LEN (2 * sizeof("YYYYmmddTHHMMSS+HHMM") + MAX_INT_DEC_LEN(uint64_t)) | |
45 | #define DIR_CREATION_MODE (S_IRWXU | S_IRWXG) | |
46 | ||
47 | enum trace_chunk_mode { | |
48 | TRACE_CHUNK_MODE_USER, | |
49 | TRACE_CHUNK_MODE_OWNER, | |
50 | }; | |
51 | ||
52 | /* | |
53 | * Callback to invoke on release of a trace chunk. Note that there is no | |
54 | * need to 'lock' the trace chunk during the execution of these callbacks | |
55 | * since only one thread may access a chunk during its destruction (the last | |
56 | * to release its reference to the chunk). | |
57 | */ | |
58 | typedef void (*chunk_close_command)(struct lttng_trace_chunk *trace_chunk); | |
59 | ||
60 | /* Move a completed trace chunk to the 'completed' trace archive folder. */ | |
61 | static | |
62 | void lttng_trace_chunk_move_to_completed(struct lttng_trace_chunk *trace_chunk); | |
63 | ||
64 | struct chunk_credentials { | |
65 | bool use_current_user; | |
66 | struct lttng_credentials user; | |
67 | }; | |
68 | ||
1a414e3a | 69 | /* NOTE: Make sure to update lttng_trace_chunk_copy if you modify this. */ |
2c5ff4e4 JG |
70 | struct lttng_trace_chunk { |
71 | pthread_mutex_t lock; | |
72 | struct urcu_ref ref; | |
73 | LTTNG_OPTIONAL(enum trace_chunk_mode) mode; | |
74 | /* | |
75 | * First-level directories created within the trace chunk. | |
76 | * Elements are of type 'char *'. | |
1a414e3a JG |
77 | * |
78 | * Only used by _owner_ mode chunks. | |
2c5ff4e4 JG |
79 | */ |
80 | struct lttng_dynamic_pointer_array top_level_directories; | |
6cb32e5a MD |
81 | /* |
82 | * All files contained within the trace chunk. | |
83 | * Array of paths (char *). | |
84 | */ | |
85 | struct lttng_dynamic_pointer_array files; | |
2c5ff4e4 JG |
86 | /* Is contained within an lttng_trace_chunk_registry_element? */ |
87 | bool in_registry_element; | |
913a542b | 88 | bool name_overridden; |
2c5ff4e4 JG |
89 | char *name; |
90 | /* An unset id means the chunk is anonymous. */ | |
91 | LTTNG_OPTIONAL(uint64_t) id; | |
92 | LTTNG_OPTIONAL(time_t) timestamp_creation; | |
93 | LTTNG_OPTIONAL(time_t) timestamp_close; | |
94 | LTTNG_OPTIONAL(struct chunk_credentials) credentials; | |
cbf53d23 JG |
95 | struct lttng_directory_handle *session_output_directory; |
96 | struct lttng_directory_handle *chunk_directory; | |
2c5ff4e4 JG |
97 | LTTNG_OPTIONAL(enum lttng_trace_chunk_command_type) close_command; |
98 | }; | |
99 | ||
100 | /* A trace chunk is uniquely identified by its (session id, chunk id) tuple. */ | |
101 | struct lttng_trace_chunk_registry_element { | |
2c5ff4e4 | 102 | struct lttng_trace_chunk chunk; |
1f2292f6 | 103 | uint64_t session_id; |
2c5ff4e4 JG |
104 | /* Weak and only set when added. */ |
105 | struct lttng_trace_chunk_registry *registry; | |
106 | struct cds_lfht_node trace_chunk_registry_ht_node; | |
107 | /* call_rcu delayed reclaim. */ | |
108 | struct rcu_head rcu_node; | |
109 | }; | |
110 | ||
111 | struct lttng_trace_chunk_registry { | |
112 | struct cds_lfht *ht; | |
113 | }; | |
114 | ||
606846ba JG |
115 | static const |
116 | char *close_command_names[] = { | |
2c5ff4e4 JG |
117 | [LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED] = |
118 | "move to completed chunk folder", | |
343defc2 MD |
119 | [LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION] = |
120 | "no operation", | |
121 | [LTTNG_TRACE_CHUNK_COMMAND_TYPE_DELETE] = | |
122 | "delete", | |
2c5ff4e4 JG |
123 | }; |
124 | ||
606846ba | 125 | static const |
2c5ff4e4 JG |
126 | chunk_close_command close_command_funcs[] = { |
127 | [LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED] = | |
128 | lttng_trace_chunk_move_to_completed, | |
129 | }; | |
130 | ||
131 | static | |
132 | bool lttng_trace_chunk_registry_element_equals( | |
133 | const struct lttng_trace_chunk_registry_element *a, | |
134 | const struct lttng_trace_chunk_registry_element *b) | |
135 | { | |
136 | if (a->session_id != b->session_id) { | |
137 | goto not_equal; | |
138 | } | |
139 | if (a->chunk.id.is_set != b->chunk.id.is_set) { | |
140 | goto not_equal; | |
141 | } | |
142 | if (a->chunk.id.is_set && a->chunk.id.value != b->chunk.id.value) { | |
143 | goto not_equal; | |
144 | } | |
145 | return true; | |
146 | not_equal: | |
147 | return false; | |
148 | } | |
149 | ||
150 | static | |
151 | int lttng_trace_chunk_registry_element_match(struct cds_lfht_node *node, | |
152 | const void *key) | |
153 | { | |
154 | const struct lttng_trace_chunk_registry_element *element_a, *element_b; | |
155 | ||
156 | element_a = (const struct lttng_trace_chunk_registry_element *) key; | |
157 | element_b = caa_container_of(node, typeof(*element_b), | |
158 | trace_chunk_registry_ht_node); | |
159 | return lttng_trace_chunk_registry_element_equals(element_a, element_b); | |
160 | } | |
161 | ||
162 | static | |
163 | unsigned long lttng_trace_chunk_registry_element_hash( | |
164 | const struct lttng_trace_chunk_registry_element *element) | |
165 | { | |
166 | unsigned long hash = hash_key_u64(&element->session_id, | |
167 | lttng_ht_seed); | |
168 | ||
169 | if (element->chunk.id.is_set) { | |
170 | hash ^= hash_key_u64(&element->chunk.id.value, lttng_ht_seed); | |
171 | } | |
172 | ||
173 | return hash; | |
174 | } | |
175 | ||
176 | static | |
177 | char *generate_chunk_name(uint64_t chunk_id, time_t creation_timestamp, | |
178 | const time_t *close_timestamp) | |
179 | { | |
180 | int ret = 0; | |
181 | char *new_name= NULL; | |
6e7e5048 JG |
182 | char start_datetime[ISO8601_STR_LEN] = {}; |
183 | /* Add 1 for a '-' prefix. */ | |
184 | char end_datetime_suffix[ISO8601_STR_LEN + 1] = {}; | |
2c5ff4e4 JG |
185 | |
186 | ret = time_to_iso8601_str( | |
187 | creation_timestamp, | |
188 | start_datetime, sizeof(start_datetime)); | |
189 | if (ret) { | |
190 | ERR("Failed to format trace chunk start date time"); | |
191 | goto error; | |
192 | } | |
193 | if (close_timestamp) { | |
194 | *end_datetime_suffix = '-'; | |
195 | ret = time_to_iso8601_str( | |
196 | *close_timestamp, | |
197 | end_datetime_suffix + 1, | |
6e7e5048 | 198 | sizeof(end_datetime_suffix) - 1); |
2c5ff4e4 JG |
199 | if (ret) { |
200 | ERR("Failed to format trace chunk end date time"); | |
201 | goto error; | |
202 | } | |
203 | } | |
204 | new_name = zmalloc(GENERATED_CHUNK_NAME_LEN); | |
205 | if (!new_name) { | |
206 | ERR("Failed to allocate buffer for automatically-generated trace chunk name"); | |
207 | goto error; | |
208 | } | |
209 | ret = snprintf(new_name, GENERATED_CHUNK_NAME_LEN, "%s%s-%" PRIu64, | |
210 | start_datetime, end_datetime_suffix, chunk_id); | |
211 | if (ret >= GENERATED_CHUNK_NAME_LEN || ret == -1) { | |
212 | ERR("Failed to format trace chunk name"); | |
213 | goto error; | |
214 | } | |
215 | ||
216 | return new_name; | |
217 | error: | |
218 | free(new_name); | |
219 | return NULL; | |
220 | } | |
221 | ||
222 | static | |
223 | void lttng_trace_chunk_init(struct lttng_trace_chunk *chunk) | |
224 | { | |
225 | urcu_ref_init(&chunk->ref); | |
226 | pthread_mutex_init(&chunk->lock, NULL); | |
93bed9fe | 227 | lttng_dynamic_pointer_array_init(&chunk->top_level_directories, free); |
6cb32e5a | 228 | lttng_dynamic_pointer_array_init(&chunk->files, free); |
2c5ff4e4 JG |
229 | } |
230 | ||
231 | static | |
232 | void lttng_trace_chunk_fini(struct lttng_trace_chunk *chunk) | |
233 | { | |
cbf53d23 JG |
234 | if (chunk->session_output_directory) { |
235 | lttng_directory_handle_put( | |
236 | chunk->session_output_directory); | |
237 | chunk->session_output_directory = NULL; | |
2c5ff4e4 | 238 | } |
cbf53d23 JG |
239 | if (chunk->chunk_directory) { |
240 | lttng_directory_handle_put(chunk->chunk_directory); | |
241 | chunk->chunk_directory = NULL; | |
2c5ff4e4 JG |
242 | } |
243 | free(chunk->name); | |
244 | chunk->name = NULL; | |
93bed9fe | 245 | lttng_dynamic_pointer_array_reset(&chunk->top_level_directories); |
6cb32e5a | 246 | lttng_dynamic_pointer_array_reset(&chunk->files); |
2c5ff4e4 JG |
247 | pthread_mutex_destroy(&chunk->lock); |
248 | } | |
249 | ||
250 | static | |
251 | struct lttng_trace_chunk *lttng_trace_chunk_allocate(void) | |
252 | { | |
253 | struct lttng_trace_chunk *chunk = NULL; | |
254 | ||
255 | chunk = zmalloc(sizeof(*chunk)); | |
256 | if (!chunk) { | |
257 | ERR("Failed to allocate trace chunk"); | |
258 | goto end; | |
259 | } | |
260 | lttng_trace_chunk_init(chunk); | |
261 | end: | |
262 | return chunk; | |
263 | } | |
264 | ||
265 | LTTNG_HIDDEN | |
266 | struct lttng_trace_chunk *lttng_trace_chunk_create_anonymous(void) | |
267 | { | |
268 | DBG("Creating anonymous trace chunk"); | |
269 | return lttng_trace_chunk_allocate(); | |
270 | } | |
271 | ||
272 | LTTNG_HIDDEN | |
273 | struct lttng_trace_chunk *lttng_trace_chunk_create( | |
274 | uint64_t chunk_id, time_t chunk_creation_time) | |
275 | { | |
276 | struct lttng_trace_chunk *chunk; | |
277 | char chunk_creation_datetime_buf[16] = {}; | |
278 | const char *chunk_creation_datetime_str = "(formatting error)"; | |
279 | struct tm timeinfo_buf, *timeinfo; | |
280 | ||
281 | timeinfo = localtime_r(&chunk_creation_time, &timeinfo_buf); | |
282 | if (timeinfo) { | |
283 | size_t strftime_ret; | |
284 | ||
285 | /* Don't fail because of this; it is only used for logging. */ | |
286 | strftime_ret = strftime(chunk_creation_datetime_buf, | |
287 | sizeof(chunk_creation_datetime_buf), | |
288 | "%Y%m%d-%H%M%S", timeinfo); | |
289 | if (strftime_ret) { | |
290 | chunk_creation_datetime_str = | |
291 | chunk_creation_datetime_buf; | |
292 | } | |
293 | } | |
294 | ||
295 | DBG("Creating trace chunk: chunk_id = %" PRIu64 ", creation time = %s", | |
296 | chunk_id, chunk_creation_datetime_str); | |
297 | chunk = lttng_trace_chunk_allocate(); | |
298 | if (!chunk) { | |
299 | goto end; | |
300 | } | |
301 | ||
302 | LTTNG_OPTIONAL_SET(&chunk->id, chunk_id); | |
303 | LTTNG_OPTIONAL_SET(&chunk->timestamp_creation, chunk_creation_time); | |
304 | if (chunk_id != 0) { | |
305 | chunk->name = generate_chunk_name(chunk_id, | |
306 | chunk_creation_time, NULL); | |
307 | if (!chunk->name) { | |
308 | ERR("Failed to allocate trace chunk name storage"); | |
309 | goto error; | |
310 | } | |
311 | } | |
312 | ||
313 | DBG("Chunk name set to \"%s\"", chunk->name ? : "(none)"); | |
314 | end: | |
315 | return chunk; | |
316 | error: | |
317 | lttng_trace_chunk_put(chunk); | |
318 | return NULL; | |
319 | } | |
320 | ||
1a414e3a JG |
321 | LTTNG_HIDDEN |
322 | struct lttng_trace_chunk *lttng_trace_chunk_copy( | |
323 | struct lttng_trace_chunk *source_chunk) | |
324 | { | |
325 | struct lttng_trace_chunk *new_chunk = lttng_trace_chunk_allocate(); | |
326 | ||
327 | if (!new_chunk) { | |
328 | goto end; | |
329 | } | |
330 | ||
331 | pthread_mutex_lock(&source_chunk->lock); | |
332 | /* | |
333 | * A new chunk is always a user; it shall create no new trace | |
334 | * subdirectories. | |
335 | */ | |
336 | new_chunk->mode = (typeof(new_chunk->mode)) { | |
337 | .is_set = true, | |
338 | .value = TRACE_CHUNK_MODE_USER, | |
339 | }; | |
340 | /* | |
341 | * top_level_directories is not copied as it is never used | |
342 | * by _user_ mode chunks. | |
343 | */ | |
344 | /* The new chunk is not part of a registry (yet, at least). */ | |
345 | new_chunk->in_registry_element = false; | |
346 | new_chunk->name_overridden = source_chunk->name_overridden; | |
347 | if (source_chunk->name) { | |
348 | new_chunk->name = strdup(source_chunk->name); | |
349 | if (!new_chunk->name) { | |
350 | ERR("Failed to copy source trace chunk name in %s()", | |
351 | __FUNCTION__); | |
352 | goto error_unlock; | |
353 | } | |
354 | } | |
355 | new_chunk->id = source_chunk->id; | |
356 | new_chunk->timestamp_creation = source_chunk->timestamp_creation; | |
357 | new_chunk->timestamp_close = source_chunk->timestamp_close; | |
358 | new_chunk->credentials = source_chunk->credentials; | |
cbf53d23 JG |
359 | if (source_chunk->session_output_directory) { |
360 | const bool reference_acquired = lttng_directory_handle_get( | |
361 | source_chunk->session_output_directory); | |
362 | ||
363 | assert(reference_acquired); | |
364 | new_chunk->session_output_directory = | |
365 | source_chunk->session_output_directory; | |
1a414e3a | 366 | } |
cbf53d23 JG |
367 | if (source_chunk->chunk_directory) { |
368 | const bool reference_acquired = lttng_directory_handle_get( | |
369 | source_chunk->chunk_directory); | |
370 | ||
371 | assert(reference_acquired); | |
372 | new_chunk->chunk_directory = source_chunk->chunk_directory; | |
1a414e3a JG |
373 | } |
374 | new_chunk->close_command = source_chunk->close_command; | |
375 | pthread_mutex_unlock(&source_chunk->lock); | |
376 | end: | |
377 | return new_chunk; | |
378 | error_unlock: | |
379 | pthread_mutex_unlock(&source_chunk->lock); | |
41d2ab71 | 380 | lttng_trace_chunk_put(new_chunk); |
1a414e3a JG |
381 | return NULL; |
382 | } | |
383 | ||
2c5ff4e4 JG |
384 | LTTNG_HIDDEN |
385 | enum lttng_trace_chunk_status lttng_trace_chunk_get_id( | |
386 | struct lttng_trace_chunk *chunk, uint64_t *id) | |
387 | { | |
388 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
389 | ||
390 | pthread_mutex_lock(&chunk->lock); | |
391 | if (chunk->id.is_set) { | |
392 | *id = chunk->id.value; | |
393 | } else { | |
394 | status = LTTNG_TRACE_CHUNK_STATUS_NONE; | |
395 | } | |
396 | pthread_mutex_unlock(&chunk->lock); | |
397 | return status; | |
398 | } | |
399 | ||
400 | LTTNG_HIDDEN | |
401 | enum lttng_trace_chunk_status lttng_trace_chunk_get_creation_timestamp( | |
402 | struct lttng_trace_chunk *chunk, time_t *creation_ts) | |
403 | ||
404 | { | |
405 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
406 | ||
407 | pthread_mutex_lock(&chunk->lock); | |
408 | if (chunk->timestamp_creation.is_set) { | |
409 | *creation_ts = chunk->timestamp_creation.value; | |
410 | } else { | |
411 | status = LTTNG_TRACE_CHUNK_STATUS_NONE; | |
412 | } | |
413 | pthread_mutex_unlock(&chunk->lock); | |
414 | return status; | |
415 | } | |
416 | ||
417 | LTTNG_HIDDEN | |
418 | enum lttng_trace_chunk_status lttng_trace_chunk_get_close_timestamp( | |
419 | struct lttng_trace_chunk *chunk, time_t *close_ts) | |
420 | { | |
421 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
422 | ||
423 | pthread_mutex_lock(&chunk->lock); | |
424 | if (chunk->timestamp_close.is_set) { | |
425 | *close_ts = chunk->timestamp_close.value; | |
426 | } else { | |
427 | status = LTTNG_TRACE_CHUNK_STATUS_NONE; | |
428 | } | |
429 | pthread_mutex_unlock(&chunk->lock); | |
430 | return status; | |
431 | } | |
432 | ||
433 | LTTNG_HIDDEN | |
434 | enum lttng_trace_chunk_status lttng_trace_chunk_set_close_timestamp( | |
435 | struct lttng_trace_chunk *chunk, time_t close_ts) | |
436 | { | |
437 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
438 | ||
439 | pthread_mutex_lock(&chunk->lock); | |
440 | if (!chunk->timestamp_creation.is_set) { | |
441 | ERR("Failed to set trace chunk close timestamp: creation timestamp is unset"); | |
442 | status = LTTNG_TRACE_CHUNK_STATUS_INVALID_OPERATION; | |
443 | goto end; | |
444 | } | |
445 | if (chunk->timestamp_creation.value > close_ts) { | |
446 | ERR("Failed to set trace chunk close timestamp: close timestamp is before creation timestamp"); | |
447 | status = LTTNG_TRACE_CHUNK_STATUS_INVALID_ARGUMENT; | |
448 | goto end; | |
449 | } | |
450 | LTTNG_OPTIONAL_SET(&chunk->timestamp_close, close_ts); | |
ecd1a12f MD |
451 | if (!chunk->name_overridden) { |
452 | free(chunk->name); | |
453 | chunk->name = generate_chunk_name(LTTNG_OPTIONAL_GET(chunk->id), | |
454 | LTTNG_OPTIONAL_GET(chunk->timestamp_creation), | |
455 | &close_ts); | |
456 | if (!chunk->name) { | |
457 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
458 | } | |
2c5ff4e4 JG |
459 | } |
460 | end: | |
461 | pthread_mutex_unlock(&chunk->lock); | |
462 | return status; | |
463 | } | |
464 | ||
465 | LTTNG_HIDDEN | |
466 | enum lttng_trace_chunk_status lttng_trace_chunk_get_name( | |
467 | struct lttng_trace_chunk *chunk, const char **name, | |
913a542b | 468 | bool *name_overridden) |
2c5ff4e4 JG |
469 | { |
470 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
471 | ||
472 | pthread_mutex_lock(&chunk->lock); | |
913a542b MD |
473 | if (name_overridden) { |
474 | *name_overridden = chunk->name_overridden; | |
2c5ff4e4 JG |
475 | } |
476 | if (!chunk->name) { | |
477 | status = LTTNG_TRACE_CHUNK_STATUS_NONE; | |
478 | goto end; | |
479 | } | |
480 | *name = chunk->name; | |
481 | end: | |
482 | pthread_mutex_unlock(&chunk->lock); | |
483 | return status; | |
484 | } | |
485 | ||
0e2d816a MD |
486 | LTTNG_HIDDEN |
487 | bool lttng_trace_chunk_get_name_overridden(struct lttng_trace_chunk *chunk) | |
488 | { | |
489 | bool name_overridden; | |
490 | ||
491 | pthread_mutex_lock(&chunk->lock); | |
492 | name_overridden = chunk->name_overridden; | |
493 | pthread_mutex_unlock(&chunk->lock); | |
494 | return name_overridden; | |
495 | } | |
496 | ||
84fa4db5 JG |
497 | static |
498 | bool is_valid_chunk_name(const char *name) | |
499 | { | |
500 | size_t len; | |
501 | ||
502 | if (!name) { | |
503 | return false; | |
504 | } | |
505 | ||
f7399c50 | 506 | len = lttng_strnlen(name, LTTNG_NAME_MAX); |
84fa4db5 JG |
507 | if (len == 0 || len == LTTNG_NAME_MAX) { |
508 | return false; | |
509 | } | |
510 | ||
511 | if (strchr(name, '/') || strchr(name, '.')) { | |
512 | return false; | |
513 | } | |
514 | ||
515 | return true; | |
516 | } | |
517 | ||
2c5ff4e4 JG |
518 | LTTNG_HIDDEN |
519 | enum lttng_trace_chunk_status lttng_trace_chunk_override_name( | |
520 | struct lttng_trace_chunk *chunk, const char *name) | |
521 | ||
522 | { | |
523 | char *new_name; | |
524 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
525 | ||
84fa4db5 | 526 | if (!is_valid_chunk_name(name)) { |
2c5ff4e4 JG |
527 | ERR("Attempted to set an invalid name on a trace chunk: name = %s", |
528 | name ? : "NULL"); | |
529 | status = LTTNG_TRACE_CHUNK_STATUS_INVALID_ARGUMENT; | |
530 | goto end; | |
531 | } | |
532 | ||
533 | pthread_mutex_lock(&chunk->lock); | |
534 | if (!chunk->id.is_set) { | |
535 | ERR("Attempted to set an override name on an anonymous trace chunk: name = %s", | |
536 | name); | |
537 | status = LTTNG_TRACE_CHUNK_STATUS_INVALID_OPERATION; | |
538 | goto end_unlock; | |
539 | } | |
540 | new_name = strdup(name); | |
541 | if (!new_name) { | |
542 | ERR("Failed to allocate new trace chunk name"); | |
543 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
544 | goto end_unlock; | |
545 | } | |
546 | free(chunk->name); | |
547 | chunk->name = new_name; | |
913a542b | 548 | chunk->name_overridden = true; |
2c5ff4e4 JG |
549 | end_unlock: |
550 | pthread_mutex_unlock(&chunk->lock); | |
551 | end: | |
552 | return status; | |
553 | } | |
554 | ||
555 | LTTNG_HIDDEN | |
556 | enum lttng_trace_chunk_status lttng_trace_chunk_get_credentials( | |
557 | struct lttng_trace_chunk *chunk, | |
558 | struct lttng_credentials *credentials) | |
559 | { | |
560 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
561 | ||
562 | pthread_mutex_lock(&chunk->lock); | |
563 | if (chunk->credentials.is_set) { | |
564 | if (chunk->credentials.value.use_current_user) { | |
565 | credentials->uid = geteuid(); | |
566 | credentials->gid = getegid(); | |
567 | } else { | |
568 | *credentials = chunk->credentials.value.user; | |
569 | } | |
570 | } else { | |
571 | status = LTTNG_TRACE_CHUNK_STATUS_NONE; | |
572 | } | |
573 | pthread_mutex_unlock(&chunk->lock); | |
574 | return status; | |
575 | } | |
576 | ||
577 | LTTNG_HIDDEN | |
578 | enum lttng_trace_chunk_status lttng_trace_chunk_set_credentials( | |
579 | struct lttng_trace_chunk *chunk, | |
580 | const struct lttng_credentials *user_credentials) | |
581 | { | |
582 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
583 | const struct chunk_credentials credentials = { | |
584 | .user = *user_credentials, | |
585 | .use_current_user = false, | |
586 | }; | |
587 | ||
588 | pthread_mutex_lock(&chunk->lock); | |
589 | if (chunk->credentials.is_set) { | |
590 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
591 | goto end; | |
592 | } | |
593 | LTTNG_OPTIONAL_SET(&chunk->credentials, credentials); | |
594 | end: | |
595 | pthread_mutex_unlock(&chunk->lock); | |
596 | return status; | |
597 | } | |
598 | ||
599 | LTTNG_HIDDEN | |
600 | enum lttng_trace_chunk_status lttng_trace_chunk_set_credentials_current_user( | |
601 | struct lttng_trace_chunk *chunk) | |
602 | { | |
603 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
604 | const struct chunk_credentials credentials = { | |
605 | .use_current_user = true, | |
606 | }; | |
607 | ||
608 | pthread_mutex_lock(&chunk->lock); | |
609 | if (chunk->credentials.is_set) { | |
610 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
611 | goto end; | |
612 | } | |
613 | LTTNG_OPTIONAL_SET(&chunk->credentials, credentials); | |
614 | end: | |
615 | pthread_mutex_unlock(&chunk->lock); | |
616 | return status; | |
617 | } | |
618 | ||
619 | ||
620 | LTTNG_HIDDEN | |
621 | enum lttng_trace_chunk_status lttng_trace_chunk_set_as_owner( | |
622 | struct lttng_trace_chunk *chunk, | |
623 | struct lttng_directory_handle *session_output_directory) | |
624 | { | |
625 | int ret; | |
626 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
cbf53d23 JG |
627 | struct lttng_directory_handle *chunk_directory_handle = NULL; |
628 | bool reference_acquired; | |
2c5ff4e4 JG |
629 | |
630 | pthread_mutex_lock(&chunk->lock); | |
631 | if (chunk->mode.is_set) { | |
632 | status = LTTNG_TRACE_CHUNK_STATUS_INVALID_OPERATION; | |
633 | goto end; | |
634 | } | |
635 | if (!chunk->credentials.is_set) { | |
636 | /* | |
637 | * Fatal error, credentials must be set before a | |
638 | * directory is created. | |
639 | */ | |
640 | ERR("Credentials of trace chunk are unset: refusing to set session output directory"); | |
641 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
642 | goto end; | |
643 | } | |
644 | ||
645 | if (chunk->name) { | |
646 | /* | |
647 | * A nameless chunk does not need its own output directory. | |
648 | * The session's output directory will be used. | |
649 | */ | |
650 | ret = lttng_directory_handle_create_subdirectory_as_user( | |
651 | session_output_directory, | |
652 | chunk->name, | |
653 | DIR_CREATION_MODE, | |
654 | !chunk->credentials.value.use_current_user ? | |
655 | &chunk->credentials.value.user : NULL); | |
656 | if (ret) { | |
657 | PERROR("Failed to create chunk output directory \"%s\"", | |
658 | chunk->name); | |
659 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
660 | goto end; | |
661 | } | |
662 | } | |
cbf53d23 | 663 | chunk_directory_handle = lttng_directory_handle_create_from_handle( |
2c5ff4e4 JG |
664 | chunk->name, |
665 | session_output_directory); | |
cbf53d23 | 666 | if (!chunk_directory_handle) { |
2c5ff4e4 JG |
667 | /* The function already logs on all error paths. */ |
668 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
669 | goto end; | |
670 | } | |
cbf53d23 JG |
671 | chunk->chunk_directory = chunk_directory_handle; |
672 | chunk_directory_handle = NULL; | |
673 | reference_acquired = lttng_directory_handle_get( | |
674 | session_output_directory); | |
675 | assert(reference_acquired); | |
676 | chunk->session_output_directory = session_output_directory; | |
2c5ff4e4 JG |
677 | LTTNG_OPTIONAL_SET(&chunk->mode, TRACE_CHUNK_MODE_OWNER); |
678 | end: | |
679 | pthread_mutex_unlock(&chunk->lock); | |
680 | return status; | |
681 | } | |
682 | ||
683 | LTTNG_HIDDEN | |
684 | enum lttng_trace_chunk_status lttng_trace_chunk_set_as_user( | |
685 | struct lttng_trace_chunk *chunk, | |
686 | struct lttng_directory_handle *chunk_directory) | |
687 | { | |
688 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
cbf53d23 | 689 | bool reference_acquired; |
2c5ff4e4 JG |
690 | |
691 | pthread_mutex_lock(&chunk->lock); | |
692 | if (chunk->mode.is_set) { | |
693 | status = LTTNG_TRACE_CHUNK_STATUS_INVALID_OPERATION; | |
694 | goto end; | |
695 | } | |
696 | if (!chunk->credentials.is_set) { | |
697 | ERR("Credentials of trace chunk are unset: refusing to set chunk output directory"); | |
698 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
699 | goto end; | |
700 | } | |
cbf53d23 JG |
701 | reference_acquired = lttng_directory_handle_get(chunk_directory); |
702 | assert(reference_acquired); | |
703 | chunk->chunk_directory = chunk_directory; | |
2c5ff4e4 JG |
704 | LTTNG_OPTIONAL_SET(&chunk->mode, TRACE_CHUNK_MODE_USER); |
705 | end: | |
706 | pthread_mutex_unlock(&chunk->lock); | |
707 | return status; | |
708 | } | |
709 | ||
710 | LTTNG_HIDDEN | |
cbf53d23 | 711 | enum lttng_trace_chunk_status lttng_trace_chunk_borrow_chunk_directory_handle( |
2c5ff4e4 JG |
712 | struct lttng_trace_chunk *chunk, |
713 | const struct lttng_directory_handle **handle) | |
714 | { | |
715 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
716 | ||
717 | pthread_mutex_lock(&chunk->lock); | |
cbf53d23 | 718 | if (!chunk->chunk_directory) { |
2c5ff4e4 JG |
719 | status = LTTNG_TRACE_CHUNK_STATUS_NONE; |
720 | goto end; | |
721 | } | |
722 | ||
cbf53d23 | 723 | *handle = chunk->chunk_directory; |
2c5ff4e4 JG |
724 | end: |
725 | pthread_mutex_unlock(&chunk->lock); | |
726 | return status; | |
727 | } | |
728 | ||
729 | /* Add a top-level directory to the trace chunk if it was previously unknown. */ | |
730 | static | |
731 | int add_top_level_directory_unique(struct lttng_trace_chunk *chunk, | |
732 | const char *new_path) | |
733 | { | |
734 | int ret = 0; | |
735 | bool found = false; | |
736 | size_t i, count = lttng_dynamic_pointer_array_get_count( | |
737 | &chunk->top_level_directories); | |
738 | const char *new_path_separator_pos = strchr(new_path, '/'); | |
739 | const ptrdiff_t new_path_top_level_len = new_path_separator_pos ? | |
740 | new_path_separator_pos - new_path : strlen(new_path); | |
741 | ||
742 | for (i = 0; i < count; i++) { | |
743 | const char *path = lttng_dynamic_pointer_array_get_pointer( | |
744 | &chunk->top_level_directories, i); | |
745 | const ptrdiff_t path_top_level_len = strlen(path); | |
746 | ||
747 | if (path_top_level_len != new_path_top_level_len) { | |
748 | continue; | |
749 | } | |
750 | if (!strncmp(path, new_path, path_top_level_len)) { | |
751 | found = true; | |
752 | break; | |
753 | } | |
754 | } | |
755 | ||
756 | if (!found) { | |
c36a763b | 757 | char *copy = lttng_strndup(new_path, new_path_top_level_len); |
2c5ff4e4 JG |
758 | |
759 | DBG("Adding new top-level directory \"%s\" to trace chunk \"%s\"", | |
760 | new_path, chunk->name ? : "(unnamed)"); | |
761 | if (!copy) { | |
762 | PERROR("Failed to copy path"); | |
763 | ret = -1; | |
764 | goto end; | |
765 | } | |
766 | ret = lttng_dynamic_pointer_array_add_pointer( | |
767 | &chunk->top_level_directories, copy); | |
768 | if (ret) { | |
769 | ERR("Allocation failure while adding top-level directory entry to a trace chunk"); | |
770 | free(copy); | |
771 | goto end; | |
772 | } | |
773 | } | |
774 | end: | |
775 | return ret; | |
776 | } | |
777 | ||
778 | LTTNG_HIDDEN | |
779 | enum lttng_trace_chunk_status lttng_trace_chunk_create_subdirectory( | |
780 | struct lttng_trace_chunk *chunk, | |
781 | const char *path) | |
782 | { | |
783 | int ret; | |
784 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
785 | ||
786 | DBG("Creating trace chunk subdirectory \"%s\"", path); | |
787 | pthread_mutex_lock(&chunk->lock); | |
788 | if (!chunk->credentials.is_set) { | |
789 | /* | |
790 | * Fatal error, credentials must be set before a | |
791 | * directory is created. | |
792 | */ | |
793 | ERR("Credentials of trace chunk are unset: refusing to create subdirectory \"%s\"", | |
794 | path); | |
795 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
796 | goto end; | |
797 | } | |
798 | if (!chunk->mode.is_set || | |
799 | chunk->mode.value != TRACE_CHUNK_MODE_OWNER) { | |
800 | ERR("Attempted to create trace chunk subdirectory \"%s\" through a non-owner chunk", | |
801 | path); | |
802 | status = LTTNG_TRACE_CHUNK_STATUS_INVALID_OPERATION; | |
803 | goto end; | |
804 | } | |
cbf53d23 | 805 | if (!chunk->chunk_directory) { |
2c5ff4e4 JG |
806 | ERR("Attempted to create trace chunk subdirectory \"%s\" before setting the chunk output directory", |
807 | path); | |
808 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
809 | goto end; | |
810 | } | |
811 | if (*path == '/') { | |
812 | ERR("Refusing to create absolute trace chunk directory \"%s\"", | |
813 | path); | |
814 | status = LTTNG_TRACE_CHUNK_STATUS_INVALID_ARGUMENT; | |
815 | goto end; | |
816 | } | |
817 | ret = lttng_directory_handle_create_subdirectory_recursive_as_user( | |
cbf53d23 | 818 | chunk->chunk_directory, path, |
2c5ff4e4 JG |
819 | DIR_CREATION_MODE, |
820 | chunk->credentials.value.use_current_user ? | |
821 | NULL : &chunk->credentials.value.user); | |
822 | if (ret) { | |
823 | PERROR("Failed to create trace chunk subdirectory \"%s\"", | |
824 | path); | |
825 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
826 | goto end; | |
827 | } | |
828 | ret = add_top_level_directory_unique(chunk, path); | |
829 | if (ret) { | |
830 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
831 | goto end; | |
832 | } | |
833 | end: | |
834 | pthread_mutex_unlock(&chunk->lock); | |
835 | return status; | |
836 | } | |
837 | ||
6cb32e5a MD |
838 | /* |
839 | * TODO: Implement O(1) lookup. | |
840 | */ | |
841 | static | |
842 | bool lttng_trace_chunk_find_file(struct lttng_trace_chunk *chunk, | |
843 | const char *path, size_t *index) | |
844 | { | |
845 | size_t i, count; | |
846 | ||
847 | count = lttng_dynamic_pointer_array_get_count(&chunk->files); | |
848 | for (i = 0; i < count; i++) { | |
849 | const char *iter_path = | |
850 | lttng_dynamic_pointer_array_get_pointer( | |
851 | &chunk->files, i); | |
852 | if (!strcmp(iter_path, path)) { | |
853 | if (index) { | |
854 | *index = i; | |
855 | } | |
856 | return true; | |
857 | } | |
858 | } | |
859 | return false; | |
860 | } | |
861 | ||
862 | static | |
863 | enum lttng_trace_chunk_status lttng_trace_chunk_add_file( | |
864 | struct lttng_trace_chunk *chunk, | |
865 | const char *path) | |
866 | { | |
867 | char *copy; | |
868 | int ret; | |
869 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
870 | ||
871 | if (lttng_trace_chunk_find_file(chunk, path, NULL)) { | |
872 | return LTTNG_TRACE_CHUNK_STATUS_OK; | |
873 | } | |
874 | DBG("Adding new file \"%s\" to trace chunk \"%s\"", | |
875 | path, chunk->name ? : "(unnamed)"); | |
876 | copy = strdup(path); | |
877 | if (!copy) { | |
878 | PERROR("Failed to copy path"); | |
879 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
880 | goto end; | |
881 | } | |
882 | ret = lttng_dynamic_pointer_array_add_pointer( | |
883 | &chunk->files, copy); | |
884 | if (ret) { | |
885 | ERR("Allocation failure while adding file to a trace chunk"); | |
886 | free(copy); | |
887 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
888 | goto end; | |
889 | } | |
890 | end: | |
891 | return status; | |
892 | } | |
893 | ||
894 | static | |
895 | void lttng_trace_chunk_remove_file( | |
896 | struct lttng_trace_chunk *chunk, | |
897 | const char *path) | |
898 | { | |
899 | size_t index; | |
900 | bool found; | |
901 | int ret; | |
902 | ||
903 | found = lttng_trace_chunk_find_file(chunk, path, &index); | |
904 | if (!found) { | |
905 | return; | |
906 | } | |
907 | ret = lttng_dynamic_pointer_array_remove_pointer( | |
908 | &chunk->files, index); | |
909 | assert(!ret); | |
910 | } | |
911 | ||
2c5ff4e4 JG |
912 | LTTNG_HIDDEN |
913 | enum lttng_trace_chunk_status lttng_trace_chunk_open_file( | |
914 | struct lttng_trace_chunk *chunk, const char *file_path, | |
3ff5c5db | 915 | int flags, mode_t mode, int *out_fd, bool expect_no_file) |
2c5ff4e4 JG |
916 | { |
917 | int ret; | |
918 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
919 | ||
920 | DBG("Opening trace chunk file \"%s\"", file_path); | |
921 | pthread_mutex_lock(&chunk->lock); | |
922 | if (!chunk->credentials.is_set) { | |
923 | /* | |
924 | * Fatal error, credentials must be set before a | |
925 | * file is created. | |
926 | */ | |
927 | ERR("Credentials of trace chunk are unset: refusing to open file \"%s\"", | |
928 | file_path); | |
929 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
930 | goto end; | |
931 | } | |
cbf53d23 | 932 | if (!chunk->chunk_directory) { |
2c5ff4e4 JG |
933 | ERR("Attempted to open trace chunk file \"%s\" before setting the chunk output directory", |
934 | file_path); | |
935 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
936 | goto end; | |
937 | } | |
6cb32e5a MD |
938 | status = lttng_trace_chunk_add_file(chunk, file_path); |
939 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
940 | goto end; | |
941 | } | |
2c5ff4e4 | 942 | ret = lttng_directory_handle_open_file_as_user( |
cbf53d23 | 943 | chunk->chunk_directory, file_path, flags, mode, |
2c5ff4e4 JG |
944 | chunk->credentials.value.use_current_user ? |
945 | NULL : &chunk->credentials.value.user); | |
946 | if (ret < 0) { | |
3ff5c5db MD |
947 | if (errno == ENOENT && expect_no_file) { |
948 | status = LTTNG_TRACE_CHUNK_STATUS_NO_FILE; | |
949 | } else { | |
950 | PERROR("Failed to open file relative to trace chunk file_path = \"%s\", flags = %d, mode = %d", | |
d2956687 | 951 | file_path, flags, (int) mode); |
3ff5c5db MD |
952 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; |
953 | } | |
6cb32e5a | 954 | lttng_trace_chunk_remove_file(chunk, file_path); |
2c5ff4e4 JG |
955 | goto end; |
956 | } | |
957 | *out_fd = ret; | |
958 | end: | |
959 | pthread_mutex_unlock(&chunk->lock); | |
960 | return status; | |
961 | } | |
962 | ||
963 | LTTNG_HIDDEN | |
964 | int lttng_trace_chunk_unlink_file(struct lttng_trace_chunk *chunk, | |
965 | const char *file_path) | |
966 | { | |
967 | int ret; | |
968 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
969 | ||
970 | DBG("Unlinking trace chunk file \"%s\"", file_path); | |
971 | pthread_mutex_lock(&chunk->lock); | |
972 | if (!chunk->credentials.is_set) { | |
973 | /* | |
974 | * Fatal error, credentials must be set before a | |
975 | * directory is created. | |
976 | */ | |
977 | ERR("Credentials of trace chunk are unset: refusing to unlink file \"%s\"", | |
978 | file_path); | |
979 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
980 | goto end; | |
981 | } | |
cbf53d23 | 982 | if (!chunk->chunk_directory) { |
2c5ff4e4 JG |
983 | ERR("Attempted to unlink trace chunk file \"%s\" before setting the chunk output directory", |
984 | file_path); | |
985 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
986 | goto end; | |
987 | } | |
988 | ret = lttng_directory_handle_unlink_file_as_user( | |
cbf53d23 | 989 | chunk->chunk_directory, file_path, |
2c5ff4e4 JG |
990 | chunk->credentials.value.use_current_user ? |
991 | NULL : &chunk->credentials.value.user); | |
992 | if (ret < 0) { | |
993 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
994 | goto end; | |
995 | } | |
6cb32e5a | 996 | lttng_trace_chunk_remove_file(chunk, file_path); |
2c5ff4e4 JG |
997 | end: |
998 | pthread_mutex_unlock(&chunk->lock); | |
999 | return status; | |
1000 | } | |
1001 | ||
1002 | static | |
1003 | void lttng_trace_chunk_move_to_completed(struct lttng_trace_chunk *trace_chunk) | |
1004 | { | |
1005 | int ret; | |
1006 | char *directory_to_rename = NULL; | |
1007 | bool free_directory_to_rename = false; | |
2c5ff4e4 JG |
1008 | char *archived_chunk_name = NULL; |
1009 | const uint64_t chunk_id = LTTNG_OPTIONAL_GET(trace_chunk->id); | |
1010 | const time_t creation_timestamp = | |
1011 | LTTNG_OPTIONAL_GET(trace_chunk->timestamp_creation); | |
1012 | const time_t close_timestamp = | |
1013 | LTTNG_OPTIONAL_GET(trace_chunk->timestamp_close); | |
cbf53d23 | 1014 | struct lttng_directory_handle *archived_chunks_directory = NULL; |
2c5ff4e4 | 1015 | |
bbc4768c JG |
1016 | if (!trace_chunk->mode.is_set || |
1017 | trace_chunk->mode.value != TRACE_CHUNK_MODE_OWNER || | |
cbf53d23 | 1018 | !trace_chunk->session_output_directory) { |
bbc4768c JG |
1019 | /* |
1020 | * This command doesn't need to run if the output is remote | |
1021 | * or if the trace chunk is not owned by this process. | |
1022 | */ | |
1023 | goto end; | |
1024 | } | |
1025 | ||
2c5ff4e4 | 1026 | assert(trace_chunk->mode.value == TRACE_CHUNK_MODE_OWNER); |
913a542b | 1027 | assert(!trace_chunk->name_overridden); |
2c5ff4e4 JG |
1028 | |
1029 | /* | |
1030 | * The fist trace chunk of a session is directly output to the | |
1031 | * session's output folder. In this case, the top level directories | |
1032 | * must be moved to a temporary folder before that temporary directory | |
1033 | * is renamed to match the chunk's name. | |
1034 | */ | |
1035 | if (chunk_id == 0) { | |
cbf53d23 JG |
1036 | struct lttng_directory_handle *temporary_rename_directory = |
1037 | NULL; | |
2c5ff4e4 | 1038 | size_t i, count = lttng_dynamic_pointer_array_get_count( |
cbf53d23 | 1039 | &trace_chunk->top_level_directories); |
2c5ff4e4 JG |
1040 | |
1041 | ret = lttng_directory_handle_create_subdirectory_as_user( | |
cbf53d23 | 1042 | trace_chunk->session_output_directory, |
2c5ff4e4 JG |
1043 | DEFAULT_TEMPORARY_CHUNK_RENAME_DIRECTORY, |
1044 | DIR_CREATION_MODE, | |
1045 | !trace_chunk->credentials.value.use_current_user ? | |
1046 | &trace_chunk->credentials.value.user : NULL); | |
1047 | if (ret) { | |
1048 | PERROR("Failed to create temporary trace chunk rename directory \"%s\"", | |
1049 | DEFAULT_TEMPORARY_CHUNK_RENAME_DIRECTORY); | |
1050 | } | |
1051 | ||
cbf53d23 | 1052 | temporary_rename_directory = lttng_directory_handle_create_from_handle( |
2c5ff4e4 | 1053 | DEFAULT_TEMPORARY_CHUNK_RENAME_DIRECTORY, |
cbf53d23 JG |
1054 | trace_chunk->session_output_directory); |
1055 | if (!temporary_rename_directory) { | |
2c5ff4e4 JG |
1056 | ERR("Failed to get handle to temporary trace chunk rename directory"); |
1057 | goto end; | |
1058 | } | |
1059 | ||
1060 | for (i = 0; i < count; i++) { | |
2c5ff4e4 JG |
1061 | const char *top_level_name = |
1062 | lttng_dynamic_pointer_array_get_pointer( | |
1063 | &trace_chunk->top_level_directories, i); | |
1064 | ||
9de831f8 | 1065 | ret = lttng_directory_handle_rename_as_user( |
cbf53d23 | 1066 | trace_chunk->session_output_directory, |
9de831f8 | 1067 | top_level_name, |
cbf53d23 | 1068 | temporary_rename_directory, |
9de831f8 JG |
1069 | top_level_name, |
1070 | LTTNG_OPTIONAL_GET(trace_chunk->credentials).use_current_user ? | |
1071 | NULL : | |
1072 | &trace_chunk->credentials.value.user); | |
2c5ff4e4 JG |
1073 | if (ret) { |
1074 | PERROR("Failed to move \"%s\" to temporary trace chunk rename directory", | |
1075 | top_level_name); | |
cbf53d23 JG |
1076 | lttng_directory_handle_put( |
1077 | temporary_rename_directory); | |
2c5ff4e4 JG |
1078 | goto end; |
1079 | } | |
1080 | } | |
cbf53d23 | 1081 | lttng_directory_handle_put(temporary_rename_directory); |
2c5ff4e4 JG |
1082 | directory_to_rename = DEFAULT_TEMPORARY_CHUNK_RENAME_DIRECTORY; |
1083 | free_directory_to_rename = false; | |
1084 | } else { | |
1085 | directory_to_rename = generate_chunk_name(chunk_id, | |
1086 | creation_timestamp, NULL); | |
1087 | if (!directory_to_rename) { | |
1088 | ERR("Failed to generate initial trace chunk name while renaming trace chunk"); | |
c222b016 | 1089 | goto end; |
2c5ff4e4 JG |
1090 | } |
1091 | free_directory_to_rename = true; | |
1092 | } | |
1093 | ||
1094 | archived_chunk_name = generate_chunk_name(chunk_id, creation_timestamp, | |
1095 | &close_timestamp); | |
1096 | if (!archived_chunk_name) { | |
1097 | ERR("Failed to generate archived trace chunk name while renaming trace chunk"); | |
1098 | goto end; | |
1099 | } | |
1100 | ||
1101 | ret = lttng_directory_handle_create_subdirectory_as_user( | |
cbf53d23 | 1102 | trace_chunk->session_output_directory, |
2c5ff4e4 JG |
1103 | DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY, |
1104 | DIR_CREATION_MODE, | |
1105 | !trace_chunk->credentials.value.use_current_user ? | |
1106 | &trace_chunk->credentials.value.user : | |
1107 | NULL); | |
1108 | if (ret) { | |
1109 | PERROR("Failed to create \"" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY | |
1110 | "\" directory for archived trace chunks"); | |
1111 | goto end; | |
1112 | } | |
1113 | ||
cbf53d23 | 1114 | archived_chunks_directory = lttng_directory_handle_create_from_handle( |
2c5ff4e4 | 1115 | DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY, |
cbf53d23 JG |
1116 | trace_chunk->session_output_directory); |
1117 | if (!archived_chunks_directory) { | |
2c5ff4e4 JG |
1118 | PERROR("Failed to get handle to archived trace chunks directory"); |
1119 | goto end; | |
1120 | } | |
2c5ff4e4 | 1121 | |
9de831f8 | 1122 | ret = lttng_directory_handle_rename_as_user( |
cbf53d23 | 1123 | trace_chunk->session_output_directory, |
9de831f8 | 1124 | directory_to_rename, |
cbf53d23 | 1125 | archived_chunks_directory, |
9de831f8 JG |
1126 | archived_chunk_name, |
1127 | LTTNG_OPTIONAL_GET(trace_chunk->credentials).use_current_user ? | |
1128 | NULL : | |
1129 | &trace_chunk->credentials.value.user); | |
2c5ff4e4 JG |
1130 | if (ret) { |
1131 | PERROR("Failed to rename folder \"%s\" to \"%s\"", | |
1132 | directory_to_rename, archived_chunk_name); | |
1133 | } | |
1134 | ||
1135 | end: | |
cbf53d23 | 1136 | lttng_directory_handle_put(archived_chunks_directory); |
2c5ff4e4 JG |
1137 | free(archived_chunk_name); |
1138 | if (free_directory_to_rename) { | |
1139 | free(directory_to_rename); | |
1140 | } | |
1141 | } | |
1142 | ||
bbc4768c JG |
1143 | LTTNG_HIDDEN |
1144 | enum lttng_trace_chunk_status lttng_trace_chunk_get_close_command( | |
1145 | struct lttng_trace_chunk *chunk, | |
1146 | enum lttng_trace_chunk_command_type *command_type) | |
1147 | { | |
1148 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
1149 | ||
1150 | pthread_mutex_lock(&chunk->lock); | |
1151 | if (chunk->close_command.is_set) { | |
1152 | *command_type = chunk->close_command.value; | |
1153 | status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
1154 | } else { | |
1155 | status = LTTNG_TRACE_CHUNK_STATUS_NONE; | |
1156 | } | |
1157 | pthread_mutex_unlock(&chunk->lock); | |
1158 | return status; | |
1159 | } | |
1160 | ||
2c5ff4e4 JG |
1161 | LTTNG_HIDDEN |
1162 | enum lttng_trace_chunk_status lttng_trace_chunk_set_close_command( | |
1163 | struct lttng_trace_chunk *chunk, | |
1164 | enum lttng_trace_chunk_command_type close_command) | |
1165 | { | |
1166 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
1167 | ||
1168 | if (close_command < LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED || | |
1169 | close_command >= LTTNG_TRACE_CHUNK_COMMAND_TYPE_MAX) { | |
1170 | status = LTTNG_TRACE_CHUNK_STATUS_INVALID_ARGUMENT; | |
6def6cd7 | 1171 | goto end; |
2c5ff4e4 JG |
1172 | } |
1173 | ||
1174 | pthread_mutex_lock(&chunk->lock); | |
1175 | if (chunk->close_command.is_set) { | |
1176 | DBG("Overriding trace chunk close command from \"%s\" to \"%s\"", | |
1177 | close_command_names[chunk->close_command.value], | |
1178 | close_command_names[close_command]); | |
1179 | } else { | |
1180 | DBG("Setting trace chunk close command to \"%s\"", | |
1181 | close_command_names[close_command]); | |
1182 | } | |
343defc2 MD |
1183 | /* |
1184 | * Unset close command for no-op for backward compatibility with relayd | |
1185 | * 2.11. | |
1186 | */ | |
1187 | if (close_command != LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION) { | |
1188 | LTTNG_OPTIONAL_SET(&chunk->close_command, close_command); | |
1189 | } else { | |
1190 | LTTNG_OPTIONAL_UNSET(&chunk->close_command); | |
1191 | } | |
2c5ff4e4 | 1192 | pthread_mutex_unlock(&chunk->lock); |
6def6cd7 | 1193 | end: |
2c5ff4e4 JG |
1194 | return status; |
1195 | } | |
1196 | ||
bbc4768c JG |
1197 | LTTNG_HIDDEN |
1198 | const char *lttng_trace_chunk_command_type_get_name( | |
1199 | enum lttng_trace_chunk_command_type command) | |
1200 | { | |
1201 | switch (command) { | |
1202 | case LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED: | |
1203 | return "move to completed trace chunk folder"; | |
343defc2 MD |
1204 | case LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION: |
1205 | return "no operation"; | |
1206 | case LTTNG_TRACE_CHUNK_COMMAND_TYPE_DELETE: | |
1207 | return "delete"; | |
bbc4768c JG |
1208 | default: |
1209 | abort(); | |
1210 | } | |
1211 | } | |
1212 | ||
2c5ff4e4 JG |
1213 | LTTNG_HIDDEN |
1214 | bool lttng_trace_chunk_get(struct lttng_trace_chunk *chunk) | |
1215 | { | |
1216 | return urcu_ref_get_unless_zero(&chunk->ref); | |
1217 | } | |
1218 | ||
1219 | static | |
1220 | void free_lttng_trace_chunk_registry_element(struct rcu_head *node) | |
1221 | { | |
1222 | struct lttng_trace_chunk_registry_element *element = | |
1223 | container_of(node, typeof(*element), rcu_node); | |
1224 | ||
1225 | lttng_trace_chunk_fini(&element->chunk); | |
1226 | free(element); | |
1227 | } | |
1228 | ||
1229 | static | |
1230 | void lttng_trace_chunk_release(struct urcu_ref *ref) | |
1231 | { | |
1232 | struct lttng_trace_chunk *chunk = container_of(ref, typeof(*chunk), | |
1233 | ref); | |
1234 | ||
1235 | if (chunk->close_command.is_set) { | |
1236 | close_command_funcs[chunk->close_command.value](chunk); | |
1237 | } | |
1238 | ||
1239 | if (chunk->in_registry_element) { | |
1240 | struct lttng_trace_chunk_registry_element *element; | |
1241 | ||
1242 | element = container_of(chunk, typeof(*element), chunk); | |
1243 | if (element->registry) { | |
1244 | rcu_read_lock(); | |
1245 | cds_lfht_del(element->registry->ht, | |
1246 | &element->trace_chunk_registry_ht_node); | |
1247 | rcu_read_unlock(); | |
1248 | call_rcu(&element->rcu_node, | |
1249 | free_lttng_trace_chunk_registry_element); | |
1250 | } else { | |
1251 | /* Never published, can be free'd immediately. */ | |
1252 | free_lttng_trace_chunk_registry_element( | |
1253 | &element->rcu_node); | |
1254 | } | |
1255 | } else { | |
1256 | /* Not RCU-protected, free immediately. */ | |
1257 | lttng_trace_chunk_fini(chunk); | |
1258 | free(chunk); | |
1259 | } | |
1260 | } | |
1261 | ||
1262 | LTTNG_HIDDEN | |
1263 | void lttng_trace_chunk_put(struct lttng_trace_chunk *chunk) | |
1264 | { | |
1265 | if (!chunk) { | |
1266 | return; | |
1267 | } | |
1268 | assert(chunk->ref.refcount); | |
1269 | urcu_ref_put(&chunk->ref, lttng_trace_chunk_release); | |
1270 | } | |
1271 | ||
1272 | LTTNG_HIDDEN | |
1273 | struct lttng_trace_chunk_registry *lttng_trace_chunk_registry_create(void) | |
1274 | { | |
1275 | struct lttng_trace_chunk_registry *registry; | |
1276 | ||
1277 | registry = zmalloc(sizeof(*registry)); | |
1278 | if (!registry) { | |
1279 | goto end; | |
1280 | } | |
1281 | ||
1282 | registry->ht = cds_lfht_new(DEFAULT_HT_SIZE, 1, 0, | |
1283 | CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL); | |
1284 | if (!registry->ht) { | |
1285 | goto error; | |
1286 | } | |
1287 | end: | |
1288 | return registry; | |
1289 | error: | |
1290 | lttng_trace_chunk_registry_destroy(registry); | |
8243bf12 | 1291 | return NULL; |
2c5ff4e4 JG |
1292 | } |
1293 | ||
1294 | LTTNG_HIDDEN | |
1295 | void lttng_trace_chunk_registry_destroy( | |
1296 | struct lttng_trace_chunk_registry *registry) | |
1297 | { | |
1298 | if (!registry) { | |
1299 | return; | |
1300 | } | |
1301 | if (registry->ht) { | |
1302 | int ret = cds_lfht_destroy(registry->ht, NULL); | |
1303 | assert(!ret); | |
1304 | } | |
1305 | free(registry); | |
1306 | } | |
1307 | ||
1308 | static | |
1309 | struct lttng_trace_chunk_registry_element * | |
1310 | lttng_trace_chunk_registry_element_create_from_chunk( | |
1311 | struct lttng_trace_chunk *chunk, uint64_t session_id) | |
1312 | { | |
1313 | struct lttng_trace_chunk_registry_element *element = | |
1314 | zmalloc(sizeof(*element)); | |
1315 | ||
1316 | if (!element) { | |
1317 | goto end; | |
1318 | } | |
1319 | cds_lfht_node_init(&element->trace_chunk_registry_ht_node); | |
1320 | element->session_id = session_id; | |
1321 | ||
1322 | element->chunk = *chunk; | |
1323 | lttng_trace_chunk_init(&element->chunk); | |
cbf53d23 JG |
1324 | if (chunk->session_output_directory) { |
1325 | /* Transferred ownership. */ | |
1326 | element->chunk.session_output_directory = | |
1327 | chunk->session_output_directory; | |
1328 | chunk->session_output_directory = NULL; | |
1329 | } | |
1330 | if (chunk->chunk_directory) { | |
1331 | /* Transferred ownership. */ | |
1332 | element->chunk.chunk_directory = chunk->chunk_directory; | |
1333 | chunk->chunk_directory = NULL; | |
2c5ff4e4 JG |
1334 | } |
1335 | /* | |
1336 | * The original chunk becomes invalid; the name attribute is transferred | |
1337 | * to the new chunk instance. | |
1338 | */ | |
1339 | chunk->name = NULL; | |
1340 | element->chunk.in_registry_element = true; | |
1341 | end: | |
1342 | return element; | |
1343 | } | |
1344 | ||
1345 | LTTNG_HIDDEN | |
1346 | struct lttng_trace_chunk * | |
1347 | lttng_trace_chunk_registry_publish_chunk( | |
1348 | struct lttng_trace_chunk_registry *registry, | |
1349 | uint64_t session_id, struct lttng_trace_chunk *chunk) | |
1350 | { | |
1351 | struct lttng_trace_chunk_registry_element *element; | |
1352 | unsigned long element_hash; | |
1353 | ||
1354 | pthread_mutex_lock(&chunk->lock); | |
1355 | element = lttng_trace_chunk_registry_element_create_from_chunk(chunk, | |
1356 | session_id); | |
1357 | pthread_mutex_unlock(&chunk->lock); | |
1358 | if (!element) { | |
1359 | goto end; | |
1360 | } | |
1361 | /* | |
1362 | * chunk is now invalid, the only valid operation is a 'put' from the | |
1363 | * caller. | |
1364 | */ | |
1365 | chunk = NULL; | |
1366 | element_hash = lttng_trace_chunk_registry_element_hash(element); | |
1367 | ||
1368 | rcu_read_lock(); | |
1369 | while (1) { | |
1370 | struct cds_lfht_node *published_node; | |
1371 | struct lttng_trace_chunk *published_chunk; | |
1372 | struct lttng_trace_chunk_registry_element *published_element; | |
1373 | ||
1374 | published_node = cds_lfht_add_unique(registry->ht, | |
1375 | element_hash, | |
1376 | lttng_trace_chunk_registry_element_match, | |
1377 | element, | |
1378 | &element->trace_chunk_registry_ht_node); | |
1379 | if (published_node == &element->trace_chunk_registry_ht_node) { | |
1380 | /* Successfully published the new element. */ | |
1381 | element->registry = registry; | |
1382 | /* Acquire a reference for the caller. */ | |
1383 | if (lttng_trace_chunk_get(&element->chunk)) { | |
1384 | break; | |
1385 | } else { | |
1386 | /* | |
1387 | * Another thread concurrently unpublished the | |
1388 | * trace chunk. This is currently unexpected. | |
1389 | * | |
1390 | * Re-attempt to publish. | |
1391 | */ | |
87cee602 | 1392 | ERR("Attempt to publish a trace chunk to the chunk registry raced with a trace chunk deletion"); |
2c5ff4e4 JG |
1393 | continue; |
1394 | } | |
1395 | } | |
1396 | ||
1397 | /* | |
1398 | * An equivalent trace chunk was published before this trace | |
1399 | * chunk. Attempt to acquire a reference to the one that was | |
1400 | * already published and release the reference to the copy we | |
1401 | * created if successful. | |
1402 | */ | |
1403 | published_element = container_of(published_node, | |
1404 | typeof(*published_element), | |
1405 | trace_chunk_registry_ht_node); | |
1406 | published_chunk = &published_element->chunk; | |
1407 | if (lttng_trace_chunk_get(published_chunk)) { | |
1408 | lttng_trace_chunk_put(&element->chunk); | |
1409 | element = published_element; | |
1410 | break; | |
1411 | } | |
1412 | /* | |
1413 | * A reference to the previously published trace chunk could not | |
1414 | * be acquired. Hence, retry to publish our copy of the trace | |
1415 | * chunk. | |
1416 | */ | |
1417 | } | |
1418 | rcu_read_unlock(); | |
1419 | end: | |
1420 | return element ? &element->chunk : NULL; | |
1421 | } | |
1422 | ||
1423 | /* | |
1424 | * Note that the caller must be registered as an RCU thread. | |
1425 | * However, it does not need to hold the RCU read lock. The RCU read lock is | |
1426 | * acquired to perform the look-up in the registry's hash table and held until | |
1427 | * after a reference to the "found" trace chunk is acquired. | |
1428 | * | |
1429 | * IOW, holding a reference guarantees the existence of the object for the | |
1430 | * caller. | |
1431 | */ | |
1432 | static | |
1433 | struct lttng_trace_chunk *_lttng_trace_chunk_registry_find_chunk( | |
1434 | const struct lttng_trace_chunk_registry *registry, | |
1435 | uint64_t session_id, uint64_t *chunk_id) | |
1436 | { | |
1437 | const struct lttng_trace_chunk_registry_element target_element = { | |
1438 | .chunk.id.is_set = !!chunk_id, | |
1439 | .chunk.id.value = chunk_id ? *chunk_id : 0, | |
1440 | .session_id = session_id, | |
1441 | }; | |
1442 | const unsigned long element_hash = | |
1443 | lttng_trace_chunk_registry_element_hash( | |
1444 | &target_element); | |
1445 | struct cds_lfht_node *published_node; | |
1446 | struct lttng_trace_chunk_registry_element *published_element; | |
1447 | struct lttng_trace_chunk *published_chunk = NULL; | |
1448 | struct cds_lfht_iter iter; | |
1449 | ||
1450 | rcu_read_lock(); | |
1451 | cds_lfht_lookup(registry->ht, | |
1452 | element_hash, | |
1453 | lttng_trace_chunk_registry_element_match, | |
1454 | &target_element, | |
1455 | &iter); | |
1456 | published_node = cds_lfht_iter_get_node(&iter); | |
1457 | if (!published_node) { | |
1458 | goto end; | |
1459 | } | |
1460 | ||
1461 | published_element = container_of(published_node, | |
1462 | typeof(*published_element), | |
1463 | trace_chunk_registry_ht_node); | |
1464 | if (lttng_trace_chunk_get(&published_element->chunk)) { | |
1465 | published_chunk = &published_element->chunk; | |
1466 | } | |
1467 | end: | |
1468 | rcu_read_unlock(); | |
1469 | return published_chunk; | |
1470 | } | |
1471 | ||
1472 | LTTNG_HIDDEN | |
1473 | struct lttng_trace_chunk * | |
1474 | lttng_trace_chunk_registry_find_chunk( | |
1475 | const struct lttng_trace_chunk_registry *registry, | |
1476 | uint64_t session_id, uint64_t chunk_id) | |
1477 | { | |
1478 | return _lttng_trace_chunk_registry_find_chunk(registry, | |
1479 | session_id, &chunk_id); | |
1480 | } | |
1481 | ||
6b584c2e JG |
1482 | LTTNG_HIDDEN |
1483 | int lttng_trace_chunk_registry_chunk_exists( | |
1484 | const struct lttng_trace_chunk_registry *registry, | |
1485 | uint64_t session_id, uint64_t chunk_id, bool *chunk_exists) | |
1486 | { | |
1487 | int ret = 0; | |
1488 | const struct lttng_trace_chunk_registry_element target_element = { | |
1489 | .chunk.id.is_set = true, | |
1490 | .chunk.id.value = chunk_id, | |
1491 | .session_id = session_id, | |
1492 | }; | |
1493 | const unsigned long element_hash = | |
1494 | lttng_trace_chunk_registry_element_hash( | |
1495 | &target_element); | |
1496 | struct cds_lfht_node *published_node; | |
1497 | struct cds_lfht_iter iter; | |
1498 | ||
1499 | rcu_read_lock(); | |
1500 | cds_lfht_lookup(registry->ht, | |
1501 | element_hash, | |
1502 | lttng_trace_chunk_registry_element_match, | |
1503 | &target_element, | |
1504 | &iter); | |
1505 | published_node = cds_lfht_iter_get_node(&iter); | |
1506 | if (!published_node) { | |
1507 | *chunk_exists = false; | |
1508 | goto end; | |
1509 | } | |
1510 | ||
1511 | *chunk_exists = !cds_lfht_is_node_deleted(published_node); | |
1512 | end: | |
1513 | rcu_read_unlock(); | |
1514 | return ret; | |
1515 | } | |
1516 | ||
2c5ff4e4 JG |
1517 | LTTNG_HIDDEN |
1518 | struct lttng_trace_chunk * | |
1519 | lttng_trace_chunk_registry_find_anonymous_chunk( | |
1520 | const struct lttng_trace_chunk_registry *registry, | |
1521 | uint64_t session_id) | |
1522 | { | |
1523 | return _lttng_trace_chunk_registry_find_chunk(registry, | |
1524 | session_id, NULL); | |
1525 | } | |
e10aec8f MD |
1526 | |
1527 | unsigned int lttng_trace_chunk_registry_put_each_chunk( | |
1528 | struct lttng_trace_chunk_registry *registry) | |
1529 | { | |
1530 | struct cds_lfht_iter iter; | |
1531 | struct lttng_trace_chunk_registry_element *chunk_element; | |
1532 | unsigned int trace_chunks_left = 0; | |
1533 | ||
1534 | DBG("Releasing trace chunk registry to all trace chunks"); | |
1535 | rcu_read_lock(); | |
1536 | cds_lfht_for_each_entry(registry->ht, | |
1537 | &iter, chunk_element, trace_chunk_registry_ht_node) { | |
1538 | const char *chunk_id_str = "none"; | |
1539 | char chunk_id_buf[MAX_INT_DEC_LEN(uint64_t)]; | |
1540 | ||
1541 | pthread_mutex_lock(&chunk_element->chunk.lock); | |
1542 | if (chunk_element->chunk.id.is_set) { | |
1543 | int fmt_ret; | |
1544 | ||
1545 | fmt_ret = snprintf(chunk_id_buf, sizeof(chunk_id_buf), | |
1546 | "%" PRIu64, | |
1547 | chunk_element->chunk.id.value); | |
1548 | if (fmt_ret < 0 || fmt_ret >= sizeof(chunk_id_buf)) { | |
1549 | chunk_id_str = "formatting error"; | |
1550 | } else { | |
1551 | chunk_id_str = chunk_id_buf; | |
1552 | } | |
1553 | } | |
1554 | ||
1555 | DBG("Releasing reference to trace chunk: session_id = %" PRIu64 | |
1556 | "chunk_id = %s, name = \"%s\", status = %s", | |
1557 | chunk_element->session_id, | |
1558 | chunk_id_str, | |
1559 | chunk_element->chunk.name ? : "none", | |
1560 | chunk_element->chunk.close_command.is_set ? | |
1561 | "open" : "closed"); | |
1562 | pthread_mutex_unlock(&chunk_element->chunk.lock); | |
1563 | lttng_trace_chunk_put(&chunk_element->chunk); | |
1564 | trace_chunks_left++; | |
1565 | } | |
1566 | rcu_read_unlock(); | |
1567 | DBG("Released reference to %u trace chunks in %s()", trace_chunks_left, | |
1568 | __FUNCTION__); | |
1569 | ||
1570 | return trace_chunks_left; | |
1571 | } |