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 | ||
84fa4db5 JG |
486 | static |
487 | bool is_valid_chunk_name(const char *name) | |
488 | { | |
489 | size_t len; | |
490 | ||
491 | if (!name) { | |
492 | return false; | |
493 | } | |
494 | ||
f7399c50 | 495 | len = lttng_strnlen(name, LTTNG_NAME_MAX); |
84fa4db5 JG |
496 | if (len == 0 || len == LTTNG_NAME_MAX) { |
497 | return false; | |
498 | } | |
499 | ||
500 | if (strchr(name, '/') || strchr(name, '.')) { | |
501 | return false; | |
502 | } | |
503 | ||
504 | return true; | |
505 | } | |
506 | ||
2c5ff4e4 JG |
507 | LTTNG_HIDDEN |
508 | enum lttng_trace_chunk_status lttng_trace_chunk_override_name( | |
509 | struct lttng_trace_chunk *chunk, const char *name) | |
510 | ||
511 | { | |
512 | char *new_name; | |
513 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
514 | ||
84fa4db5 | 515 | if (!is_valid_chunk_name(name)) { |
2c5ff4e4 JG |
516 | ERR("Attempted to set an invalid name on a trace chunk: name = %s", |
517 | name ? : "NULL"); | |
518 | status = LTTNG_TRACE_CHUNK_STATUS_INVALID_ARGUMENT; | |
519 | goto end; | |
520 | } | |
521 | ||
522 | pthread_mutex_lock(&chunk->lock); | |
523 | if (!chunk->id.is_set) { | |
524 | ERR("Attempted to set an override name on an anonymous trace chunk: name = %s", | |
525 | name); | |
526 | status = LTTNG_TRACE_CHUNK_STATUS_INVALID_OPERATION; | |
527 | goto end_unlock; | |
528 | } | |
529 | new_name = strdup(name); | |
530 | if (!new_name) { | |
531 | ERR("Failed to allocate new trace chunk name"); | |
532 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
533 | goto end_unlock; | |
534 | } | |
535 | free(chunk->name); | |
536 | chunk->name = new_name; | |
913a542b | 537 | chunk->name_overridden = true; |
2c5ff4e4 JG |
538 | end_unlock: |
539 | pthread_mutex_unlock(&chunk->lock); | |
540 | end: | |
541 | return status; | |
542 | } | |
543 | ||
544 | LTTNG_HIDDEN | |
545 | enum lttng_trace_chunk_status lttng_trace_chunk_get_credentials( | |
546 | struct lttng_trace_chunk *chunk, | |
547 | struct lttng_credentials *credentials) | |
548 | { | |
549 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
550 | ||
551 | pthread_mutex_lock(&chunk->lock); | |
552 | if (chunk->credentials.is_set) { | |
553 | if (chunk->credentials.value.use_current_user) { | |
554 | credentials->uid = geteuid(); | |
555 | credentials->gid = getegid(); | |
556 | } else { | |
557 | *credentials = chunk->credentials.value.user; | |
558 | } | |
559 | } else { | |
560 | status = LTTNG_TRACE_CHUNK_STATUS_NONE; | |
561 | } | |
562 | pthread_mutex_unlock(&chunk->lock); | |
563 | return status; | |
564 | } | |
565 | ||
566 | LTTNG_HIDDEN | |
567 | enum lttng_trace_chunk_status lttng_trace_chunk_set_credentials( | |
568 | struct lttng_trace_chunk *chunk, | |
569 | const struct lttng_credentials *user_credentials) | |
570 | { | |
571 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
572 | const struct chunk_credentials credentials = { | |
573 | .user = *user_credentials, | |
574 | .use_current_user = false, | |
575 | }; | |
576 | ||
577 | pthread_mutex_lock(&chunk->lock); | |
578 | if (chunk->credentials.is_set) { | |
579 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
580 | goto end; | |
581 | } | |
582 | LTTNG_OPTIONAL_SET(&chunk->credentials, credentials); | |
583 | end: | |
584 | pthread_mutex_unlock(&chunk->lock); | |
585 | return status; | |
586 | } | |
587 | ||
588 | LTTNG_HIDDEN | |
589 | enum lttng_trace_chunk_status lttng_trace_chunk_set_credentials_current_user( | |
590 | struct lttng_trace_chunk *chunk) | |
591 | { | |
592 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
593 | const struct chunk_credentials credentials = { | |
594 | .use_current_user = true, | |
595 | }; | |
596 | ||
597 | pthread_mutex_lock(&chunk->lock); | |
598 | if (chunk->credentials.is_set) { | |
599 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
600 | goto end; | |
601 | } | |
602 | LTTNG_OPTIONAL_SET(&chunk->credentials, credentials); | |
603 | end: | |
604 | pthread_mutex_unlock(&chunk->lock); | |
605 | return status; | |
606 | } | |
607 | ||
608 | ||
609 | LTTNG_HIDDEN | |
610 | enum lttng_trace_chunk_status lttng_trace_chunk_set_as_owner( | |
611 | struct lttng_trace_chunk *chunk, | |
612 | struct lttng_directory_handle *session_output_directory) | |
613 | { | |
614 | int ret; | |
615 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
cbf53d23 JG |
616 | struct lttng_directory_handle *chunk_directory_handle = NULL; |
617 | bool reference_acquired; | |
2c5ff4e4 JG |
618 | |
619 | pthread_mutex_lock(&chunk->lock); | |
620 | if (chunk->mode.is_set) { | |
621 | status = LTTNG_TRACE_CHUNK_STATUS_INVALID_OPERATION; | |
622 | goto end; | |
623 | } | |
624 | if (!chunk->credentials.is_set) { | |
625 | /* | |
626 | * Fatal error, credentials must be set before a | |
627 | * directory is created. | |
628 | */ | |
629 | ERR("Credentials of trace chunk are unset: refusing to set session output directory"); | |
630 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
631 | goto end; | |
632 | } | |
633 | ||
634 | if (chunk->name) { | |
635 | /* | |
636 | * A nameless chunk does not need its own output directory. | |
637 | * The session's output directory will be used. | |
638 | */ | |
639 | ret = lttng_directory_handle_create_subdirectory_as_user( | |
640 | session_output_directory, | |
641 | chunk->name, | |
642 | DIR_CREATION_MODE, | |
643 | !chunk->credentials.value.use_current_user ? | |
644 | &chunk->credentials.value.user : NULL); | |
645 | if (ret) { | |
646 | PERROR("Failed to create chunk output directory \"%s\"", | |
647 | chunk->name); | |
648 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
649 | goto end; | |
650 | } | |
651 | } | |
cbf53d23 | 652 | chunk_directory_handle = lttng_directory_handle_create_from_handle( |
2c5ff4e4 JG |
653 | chunk->name, |
654 | session_output_directory); | |
cbf53d23 | 655 | if (!chunk_directory_handle) { |
2c5ff4e4 JG |
656 | /* The function already logs on all error paths. */ |
657 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
658 | goto end; | |
659 | } | |
cbf53d23 JG |
660 | chunk->chunk_directory = chunk_directory_handle; |
661 | chunk_directory_handle = NULL; | |
662 | reference_acquired = lttng_directory_handle_get( | |
663 | session_output_directory); | |
664 | assert(reference_acquired); | |
665 | chunk->session_output_directory = session_output_directory; | |
2c5ff4e4 JG |
666 | LTTNG_OPTIONAL_SET(&chunk->mode, TRACE_CHUNK_MODE_OWNER); |
667 | end: | |
668 | pthread_mutex_unlock(&chunk->lock); | |
669 | return status; | |
670 | } | |
671 | ||
672 | LTTNG_HIDDEN | |
673 | enum lttng_trace_chunk_status lttng_trace_chunk_set_as_user( | |
674 | struct lttng_trace_chunk *chunk, | |
675 | struct lttng_directory_handle *chunk_directory) | |
676 | { | |
677 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
cbf53d23 | 678 | bool reference_acquired; |
2c5ff4e4 JG |
679 | |
680 | pthread_mutex_lock(&chunk->lock); | |
681 | if (chunk->mode.is_set) { | |
682 | status = LTTNG_TRACE_CHUNK_STATUS_INVALID_OPERATION; | |
683 | goto end; | |
684 | } | |
685 | if (!chunk->credentials.is_set) { | |
686 | ERR("Credentials of trace chunk are unset: refusing to set chunk output directory"); | |
687 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
688 | goto end; | |
689 | } | |
cbf53d23 JG |
690 | reference_acquired = lttng_directory_handle_get(chunk_directory); |
691 | assert(reference_acquired); | |
692 | chunk->chunk_directory = chunk_directory; | |
2c5ff4e4 JG |
693 | LTTNG_OPTIONAL_SET(&chunk->mode, TRACE_CHUNK_MODE_USER); |
694 | end: | |
695 | pthread_mutex_unlock(&chunk->lock); | |
696 | return status; | |
697 | } | |
698 | ||
699 | LTTNG_HIDDEN | |
cbf53d23 | 700 | enum lttng_trace_chunk_status lttng_trace_chunk_borrow_chunk_directory_handle( |
2c5ff4e4 JG |
701 | struct lttng_trace_chunk *chunk, |
702 | const struct lttng_directory_handle **handle) | |
703 | { | |
704 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
705 | ||
706 | pthread_mutex_lock(&chunk->lock); | |
cbf53d23 | 707 | if (!chunk->chunk_directory) { |
2c5ff4e4 JG |
708 | status = LTTNG_TRACE_CHUNK_STATUS_NONE; |
709 | goto end; | |
710 | } | |
711 | ||
cbf53d23 | 712 | *handle = chunk->chunk_directory; |
2c5ff4e4 JG |
713 | end: |
714 | pthread_mutex_unlock(&chunk->lock); | |
715 | return status; | |
716 | } | |
717 | ||
718 | /* Add a top-level directory to the trace chunk if it was previously unknown. */ | |
719 | static | |
720 | int add_top_level_directory_unique(struct lttng_trace_chunk *chunk, | |
721 | const char *new_path) | |
722 | { | |
723 | int ret = 0; | |
724 | bool found = false; | |
725 | size_t i, count = lttng_dynamic_pointer_array_get_count( | |
726 | &chunk->top_level_directories); | |
727 | const char *new_path_separator_pos = strchr(new_path, '/'); | |
728 | const ptrdiff_t new_path_top_level_len = new_path_separator_pos ? | |
729 | new_path_separator_pos - new_path : strlen(new_path); | |
730 | ||
731 | for (i = 0; i < count; i++) { | |
732 | const char *path = lttng_dynamic_pointer_array_get_pointer( | |
733 | &chunk->top_level_directories, i); | |
734 | const ptrdiff_t path_top_level_len = strlen(path); | |
735 | ||
736 | if (path_top_level_len != new_path_top_level_len) { | |
737 | continue; | |
738 | } | |
739 | if (!strncmp(path, new_path, path_top_level_len)) { | |
740 | found = true; | |
741 | break; | |
742 | } | |
743 | } | |
744 | ||
745 | if (!found) { | |
c36a763b | 746 | char *copy = lttng_strndup(new_path, new_path_top_level_len); |
2c5ff4e4 JG |
747 | |
748 | DBG("Adding new top-level directory \"%s\" to trace chunk \"%s\"", | |
749 | new_path, chunk->name ? : "(unnamed)"); | |
750 | if (!copy) { | |
751 | PERROR("Failed to copy path"); | |
752 | ret = -1; | |
753 | goto end; | |
754 | } | |
755 | ret = lttng_dynamic_pointer_array_add_pointer( | |
756 | &chunk->top_level_directories, copy); | |
757 | if (ret) { | |
758 | ERR("Allocation failure while adding top-level directory entry to a trace chunk"); | |
759 | free(copy); | |
760 | goto end; | |
761 | } | |
762 | } | |
763 | end: | |
764 | return ret; | |
765 | } | |
766 | ||
767 | LTTNG_HIDDEN | |
768 | enum lttng_trace_chunk_status lttng_trace_chunk_create_subdirectory( | |
769 | struct lttng_trace_chunk *chunk, | |
770 | const char *path) | |
771 | { | |
772 | int ret; | |
773 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
774 | ||
775 | DBG("Creating trace chunk subdirectory \"%s\"", path); | |
776 | pthread_mutex_lock(&chunk->lock); | |
777 | if (!chunk->credentials.is_set) { | |
778 | /* | |
779 | * Fatal error, credentials must be set before a | |
780 | * directory is created. | |
781 | */ | |
782 | ERR("Credentials of trace chunk are unset: refusing to create subdirectory \"%s\"", | |
783 | path); | |
784 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
785 | goto end; | |
786 | } | |
787 | if (!chunk->mode.is_set || | |
788 | chunk->mode.value != TRACE_CHUNK_MODE_OWNER) { | |
789 | ERR("Attempted to create trace chunk subdirectory \"%s\" through a non-owner chunk", | |
790 | path); | |
791 | status = LTTNG_TRACE_CHUNK_STATUS_INVALID_OPERATION; | |
792 | goto end; | |
793 | } | |
cbf53d23 | 794 | if (!chunk->chunk_directory) { |
2c5ff4e4 JG |
795 | ERR("Attempted to create trace chunk subdirectory \"%s\" before setting the chunk output directory", |
796 | path); | |
797 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
798 | goto end; | |
799 | } | |
800 | if (*path == '/') { | |
801 | ERR("Refusing to create absolute trace chunk directory \"%s\"", | |
802 | path); | |
803 | status = LTTNG_TRACE_CHUNK_STATUS_INVALID_ARGUMENT; | |
804 | goto end; | |
805 | } | |
806 | ret = lttng_directory_handle_create_subdirectory_recursive_as_user( | |
cbf53d23 | 807 | chunk->chunk_directory, path, |
2c5ff4e4 JG |
808 | DIR_CREATION_MODE, |
809 | chunk->credentials.value.use_current_user ? | |
810 | NULL : &chunk->credentials.value.user); | |
811 | if (ret) { | |
812 | PERROR("Failed to create trace chunk subdirectory \"%s\"", | |
813 | path); | |
814 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
815 | goto end; | |
816 | } | |
817 | ret = add_top_level_directory_unique(chunk, path); | |
818 | if (ret) { | |
819 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
820 | goto end; | |
821 | } | |
822 | end: | |
823 | pthread_mutex_unlock(&chunk->lock); | |
824 | return status; | |
825 | } | |
826 | ||
6cb32e5a MD |
827 | /* |
828 | * TODO: Implement O(1) lookup. | |
829 | */ | |
830 | static | |
831 | bool lttng_trace_chunk_find_file(struct lttng_trace_chunk *chunk, | |
832 | const char *path, size_t *index) | |
833 | { | |
834 | size_t i, count; | |
835 | ||
836 | count = lttng_dynamic_pointer_array_get_count(&chunk->files); | |
837 | for (i = 0; i < count; i++) { | |
838 | const char *iter_path = | |
839 | lttng_dynamic_pointer_array_get_pointer( | |
840 | &chunk->files, i); | |
841 | if (!strcmp(iter_path, path)) { | |
842 | if (index) { | |
843 | *index = i; | |
844 | } | |
845 | return true; | |
846 | } | |
847 | } | |
848 | return false; | |
849 | } | |
850 | ||
851 | static | |
852 | enum lttng_trace_chunk_status lttng_trace_chunk_add_file( | |
853 | struct lttng_trace_chunk *chunk, | |
854 | const char *path) | |
855 | { | |
856 | char *copy; | |
857 | int ret; | |
858 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
859 | ||
860 | if (lttng_trace_chunk_find_file(chunk, path, NULL)) { | |
861 | return LTTNG_TRACE_CHUNK_STATUS_OK; | |
862 | } | |
863 | DBG("Adding new file \"%s\" to trace chunk \"%s\"", | |
864 | path, chunk->name ? : "(unnamed)"); | |
865 | copy = strdup(path); | |
866 | if (!copy) { | |
867 | PERROR("Failed to copy path"); | |
868 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
869 | goto end; | |
870 | } | |
871 | ret = lttng_dynamic_pointer_array_add_pointer( | |
872 | &chunk->files, copy); | |
873 | if (ret) { | |
874 | ERR("Allocation failure while adding file to a trace chunk"); | |
875 | free(copy); | |
876 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
877 | goto end; | |
878 | } | |
879 | end: | |
880 | return status; | |
881 | } | |
882 | ||
883 | static | |
884 | void lttng_trace_chunk_remove_file( | |
885 | struct lttng_trace_chunk *chunk, | |
886 | const char *path) | |
887 | { | |
888 | size_t index; | |
889 | bool found; | |
890 | int ret; | |
891 | ||
892 | found = lttng_trace_chunk_find_file(chunk, path, &index); | |
893 | if (!found) { | |
894 | return; | |
895 | } | |
896 | ret = lttng_dynamic_pointer_array_remove_pointer( | |
897 | &chunk->files, index); | |
898 | assert(!ret); | |
899 | } | |
900 | ||
2c5ff4e4 JG |
901 | LTTNG_HIDDEN |
902 | enum lttng_trace_chunk_status lttng_trace_chunk_open_file( | |
903 | struct lttng_trace_chunk *chunk, const char *file_path, | |
3ff5c5db | 904 | int flags, mode_t mode, int *out_fd, bool expect_no_file) |
2c5ff4e4 JG |
905 | { |
906 | int ret; | |
907 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
908 | ||
909 | DBG("Opening trace chunk file \"%s\"", file_path); | |
910 | pthread_mutex_lock(&chunk->lock); | |
911 | if (!chunk->credentials.is_set) { | |
912 | /* | |
913 | * Fatal error, credentials must be set before a | |
914 | * file is created. | |
915 | */ | |
916 | ERR("Credentials of trace chunk are unset: refusing to open file \"%s\"", | |
917 | file_path); | |
918 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
919 | goto end; | |
920 | } | |
cbf53d23 | 921 | if (!chunk->chunk_directory) { |
2c5ff4e4 JG |
922 | ERR("Attempted to open trace chunk file \"%s\" before setting the chunk output directory", |
923 | file_path); | |
924 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
925 | goto end; | |
926 | } | |
6cb32e5a MD |
927 | status = lttng_trace_chunk_add_file(chunk, file_path); |
928 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
929 | goto end; | |
930 | } | |
2c5ff4e4 | 931 | ret = lttng_directory_handle_open_file_as_user( |
cbf53d23 | 932 | chunk->chunk_directory, file_path, flags, mode, |
2c5ff4e4 JG |
933 | chunk->credentials.value.use_current_user ? |
934 | NULL : &chunk->credentials.value.user); | |
935 | if (ret < 0) { | |
3ff5c5db MD |
936 | if (errno == ENOENT && expect_no_file) { |
937 | status = LTTNG_TRACE_CHUNK_STATUS_NO_FILE; | |
938 | } else { | |
939 | PERROR("Failed to open file relative to trace chunk file_path = \"%s\", flags = %d, mode = %d", | |
d2956687 | 940 | file_path, flags, (int) mode); |
3ff5c5db MD |
941 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; |
942 | } | |
6cb32e5a | 943 | lttng_trace_chunk_remove_file(chunk, file_path); |
2c5ff4e4 JG |
944 | goto end; |
945 | } | |
946 | *out_fd = ret; | |
947 | end: | |
948 | pthread_mutex_unlock(&chunk->lock); | |
949 | return status; | |
950 | } | |
951 | ||
952 | LTTNG_HIDDEN | |
953 | int lttng_trace_chunk_unlink_file(struct lttng_trace_chunk *chunk, | |
954 | const char *file_path) | |
955 | { | |
956 | int ret; | |
957 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
958 | ||
959 | DBG("Unlinking trace chunk file \"%s\"", file_path); | |
960 | pthread_mutex_lock(&chunk->lock); | |
961 | if (!chunk->credentials.is_set) { | |
962 | /* | |
963 | * Fatal error, credentials must be set before a | |
964 | * directory is created. | |
965 | */ | |
966 | ERR("Credentials of trace chunk are unset: refusing to unlink file \"%s\"", | |
967 | file_path); | |
968 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
969 | goto end; | |
970 | } | |
cbf53d23 | 971 | if (!chunk->chunk_directory) { |
2c5ff4e4 JG |
972 | ERR("Attempted to unlink trace chunk file \"%s\" before setting the chunk output directory", |
973 | file_path); | |
974 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
975 | goto end; | |
976 | } | |
977 | ret = lttng_directory_handle_unlink_file_as_user( | |
cbf53d23 | 978 | chunk->chunk_directory, file_path, |
2c5ff4e4 JG |
979 | chunk->credentials.value.use_current_user ? |
980 | NULL : &chunk->credentials.value.user); | |
981 | if (ret < 0) { | |
982 | status = LTTNG_TRACE_CHUNK_STATUS_ERROR; | |
983 | goto end; | |
984 | } | |
6cb32e5a | 985 | lttng_trace_chunk_remove_file(chunk, file_path); |
2c5ff4e4 JG |
986 | end: |
987 | pthread_mutex_unlock(&chunk->lock); | |
988 | return status; | |
989 | } | |
990 | ||
991 | static | |
992 | void lttng_trace_chunk_move_to_completed(struct lttng_trace_chunk *trace_chunk) | |
993 | { | |
994 | int ret; | |
995 | char *directory_to_rename = NULL; | |
996 | bool free_directory_to_rename = false; | |
2c5ff4e4 JG |
997 | char *archived_chunk_name = NULL; |
998 | const uint64_t chunk_id = LTTNG_OPTIONAL_GET(trace_chunk->id); | |
999 | const time_t creation_timestamp = | |
1000 | LTTNG_OPTIONAL_GET(trace_chunk->timestamp_creation); | |
1001 | const time_t close_timestamp = | |
1002 | LTTNG_OPTIONAL_GET(trace_chunk->timestamp_close); | |
cbf53d23 | 1003 | struct lttng_directory_handle *archived_chunks_directory = NULL; |
2c5ff4e4 | 1004 | |
bbc4768c JG |
1005 | if (!trace_chunk->mode.is_set || |
1006 | trace_chunk->mode.value != TRACE_CHUNK_MODE_OWNER || | |
cbf53d23 | 1007 | !trace_chunk->session_output_directory) { |
bbc4768c JG |
1008 | /* |
1009 | * This command doesn't need to run if the output is remote | |
1010 | * or if the trace chunk is not owned by this process. | |
1011 | */ | |
1012 | goto end; | |
1013 | } | |
1014 | ||
2c5ff4e4 | 1015 | assert(trace_chunk->mode.value == TRACE_CHUNK_MODE_OWNER); |
913a542b | 1016 | assert(!trace_chunk->name_overridden); |
2c5ff4e4 JG |
1017 | |
1018 | /* | |
1019 | * The fist trace chunk of a session is directly output to the | |
1020 | * session's output folder. In this case, the top level directories | |
1021 | * must be moved to a temporary folder before that temporary directory | |
1022 | * is renamed to match the chunk's name. | |
1023 | */ | |
1024 | if (chunk_id == 0) { | |
cbf53d23 JG |
1025 | struct lttng_directory_handle *temporary_rename_directory = |
1026 | NULL; | |
2c5ff4e4 | 1027 | size_t i, count = lttng_dynamic_pointer_array_get_count( |
cbf53d23 | 1028 | &trace_chunk->top_level_directories); |
2c5ff4e4 JG |
1029 | |
1030 | ret = lttng_directory_handle_create_subdirectory_as_user( | |
cbf53d23 | 1031 | trace_chunk->session_output_directory, |
2c5ff4e4 JG |
1032 | DEFAULT_TEMPORARY_CHUNK_RENAME_DIRECTORY, |
1033 | DIR_CREATION_MODE, | |
1034 | !trace_chunk->credentials.value.use_current_user ? | |
1035 | &trace_chunk->credentials.value.user : NULL); | |
1036 | if (ret) { | |
1037 | PERROR("Failed to create temporary trace chunk rename directory \"%s\"", | |
1038 | DEFAULT_TEMPORARY_CHUNK_RENAME_DIRECTORY); | |
1039 | } | |
1040 | ||
cbf53d23 | 1041 | temporary_rename_directory = lttng_directory_handle_create_from_handle( |
2c5ff4e4 | 1042 | DEFAULT_TEMPORARY_CHUNK_RENAME_DIRECTORY, |
cbf53d23 JG |
1043 | trace_chunk->session_output_directory); |
1044 | if (!temporary_rename_directory) { | |
2c5ff4e4 JG |
1045 | ERR("Failed to get handle to temporary trace chunk rename directory"); |
1046 | goto end; | |
1047 | } | |
1048 | ||
1049 | for (i = 0; i < count; i++) { | |
2c5ff4e4 JG |
1050 | const char *top_level_name = |
1051 | lttng_dynamic_pointer_array_get_pointer( | |
1052 | &trace_chunk->top_level_directories, i); | |
1053 | ||
9de831f8 | 1054 | ret = lttng_directory_handle_rename_as_user( |
cbf53d23 | 1055 | trace_chunk->session_output_directory, |
9de831f8 | 1056 | top_level_name, |
cbf53d23 | 1057 | temporary_rename_directory, |
9de831f8 JG |
1058 | top_level_name, |
1059 | LTTNG_OPTIONAL_GET(trace_chunk->credentials).use_current_user ? | |
1060 | NULL : | |
1061 | &trace_chunk->credentials.value.user); | |
2c5ff4e4 JG |
1062 | if (ret) { |
1063 | PERROR("Failed to move \"%s\" to temporary trace chunk rename directory", | |
1064 | top_level_name); | |
cbf53d23 JG |
1065 | lttng_directory_handle_put( |
1066 | temporary_rename_directory); | |
2c5ff4e4 JG |
1067 | goto end; |
1068 | } | |
1069 | } | |
cbf53d23 | 1070 | lttng_directory_handle_put(temporary_rename_directory); |
2c5ff4e4 JG |
1071 | directory_to_rename = DEFAULT_TEMPORARY_CHUNK_RENAME_DIRECTORY; |
1072 | free_directory_to_rename = false; | |
1073 | } else { | |
1074 | directory_to_rename = generate_chunk_name(chunk_id, | |
1075 | creation_timestamp, NULL); | |
1076 | if (!directory_to_rename) { | |
1077 | ERR("Failed to generate initial trace chunk name while renaming trace chunk"); | |
c222b016 | 1078 | goto end; |
2c5ff4e4 JG |
1079 | } |
1080 | free_directory_to_rename = true; | |
1081 | } | |
1082 | ||
1083 | archived_chunk_name = generate_chunk_name(chunk_id, creation_timestamp, | |
1084 | &close_timestamp); | |
1085 | if (!archived_chunk_name) { | |
1086 | ERR("Failed to generate archived trace chunk name while renaming trace chunk"); | |
1087 | goto end; | |
1088 | } | |
1089 | ||
1090 | ret = lttng_directory_handle_create_subdirectory_as_user( | |
cbf53d23 | 1091 | trace_chunk->session_output_directory, |
2c5ff4e4 JG |
1092 | DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY, |
1093 | DIR_CREATION_MODE, | |
1094 | !trace_chunk->credentials.value.use_current_user ? | |
1095 | &trace_chunk->credentials.value.user : | |
1096 | NULL); | |
1097 | if (ret) { | |
1098 | PERROR("Failed to create \"" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY | |
1099 | "\" directory for archived trace chunks"); | |
1100 | goto end; | |
1101 | } | |
1102 | ||
cbf53d23 | 1103 | archived_chunks_directory = lttng_directory_handle_create_from_handle( |
2c5ff4e4 | 1104 | DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY, |
cbf53d23 JG |
1105 | trace_chunk->session_output_directory); |
1106 | if (!archived_chunks_directory) { | |
2c5ff4e4 JG |
1107 | PERROR("Failed to get handle to archived trace chunks directory"); |
1108 | goto end; | |
1109 | } | |
2c5ff4e4 | 1110 | |
9de831f8 | 1111 | ret = lttng_directory_handle_rename_as_user( |
cbf53d23 | 1112 | trace_chunk->session_output_directory, |
9de831f8 | 1113 | directory_to_rename, |
cbf53d23 | 1114 | archived_chunks_directory, |
9de831f8 JG |
1115 | archived_chunk_name, |
1116 | LTTNG_OPTIONAL_GET(trace_chunk->credentials).use_current_user ? | |
1117 | NULL : | |
1118 | &trace_chunk->credentials.value.user); | |
2c5ff4e4 JG |
1119 | if (ret) { |
1120 | PERROR("Failed to rename folder \"%s\" to \"%s\"", | |
1121 | directory_to_rename, archived_chunk_name); | |
1122 | } | |
1123 | ||
1124 | end: | |
cbf53d23 | 1125 | lttng_directory_handle_put(archived_chunks_directory); |
2c5ff4e4 JG |
1126 | free(archived_chunk_name); |
1127 | if (free_directory_to_rename) { | |
1128 | free(directory_to_rename); | |
1129 | } | |
1130 | } | |
1131 | ||
bbc4768c JG |
1132 | LTTNG_HIDDEN |
1133 | enum lttng_trace_chunk_status lttng_trace_chunk_get_close_command( | |
1134 | struct lttng_trace_chunk *chunk, | |
1135 | enum lttng_trace_chunk_command_type *command_type) | |
1136 | { | |
1137 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
1138 | ||
1139 | pthread_mutex_lock(&chunk->lock); | |
1140 | if (chunk->close_command.is_set) { | |
1141 | *command_type = chunk->close_command.value; | |
1142 | status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
1143 | } else { | |
1144 | status = LTTNG_TRACE_CHUNK_STATUS_NONE; | |
1145 | } | |
1146 | pthread_mutex_unlock(&chunk->lock); | |
1147 | return status; | |
1148 | } | |
1149 | ||
2c5ff4e4 JG |
1150 | LTTNG_HIDDEN |
1151 | enum lttng_trace_chunk_status lttng_trace_chunk_set_close_command( | |
1152 | struct lttng_trace_chunk *chunk, | |
1153 | enum lttng_trace_chunk_command_type close_command) | |
1154 | { | |
1155 | enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK; | |
1156 | ||
1157 | if (close_command < LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED || | |
1158 | close_command >= LTTNG_TRACE_CHUNK_COMMAND_TYPE_MAX) { | |
1159 | status = LTTNG_TRACE_CHUNK_STATUS_INVALID_ARGUMENT; | |
6def6cd7 | 1160 | goto end; |
2c5ff4e4 JG |
1161 | } |
1162 | ||
1163 | pthread_mutex_lock(&chunk->lock); | |
1164 | if (chunk->close_command.is_set) { | |
1165 | DBG("Overriding trace chunk close command from \"%s\" to \"%s\"", | |
1166 | close_command_names[chunk->close_command.value], | |
1167 | close_command_names[close_command]); | |
1168 | } else { | |
1169 | DBG("Setting trace chunk close command to \"%s\"", | |
1170 | close_command_names[close_command]); | |
1171 | } | |
343defc2 MD |
1172 | /* |
1173 | * Unset close command for no-op for backward compatibility with relayd | |
1174 | * 2.11. | |
1175 | */ | |
1176 | if (close_command != LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION) { | |
1177 | LTTNG_OPTIONAL_SET(&chunk->close_command, close_command); | |
1178 | } else { | |
1179 | LTTNG_OPTIONAL_UNSET(&chunk->close_command); | |
1180 | } | |
2c5ff4e4 | 1181 | pthread_mutex_unlock(&chunk->lock); |
6def6cd7 | 1182 | end: |
2c5ff4e4 JG |
1183 | return status; |
1184 | } | |
1185 | ||
bbc4768c JG |
1186 | LTTNG_HIDDEN |
1187 | const char *lttng_trace_chunk_command_type_get_name( | |
1188 | enum lttng_trace_chunk_command_type command) | |
1189 | { | |
1190 | switch (command) { | |
1191 | case LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED: | |
1192 | return "move to completed trace chunk folder"; | |
343defc2 MD |
1193 | case LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION: |
1194 | return "no operation"; | |
1195 | case LTTNG_TRACE_CHUNK_COMMAND_TYPE_DELETE: | |
1196 | return "delete"; | |
bbc4768c JG |
1197 | default: |
1198 | abort(); | |
1199 | } | |
1200 | } | |
1201 | ||
2c5ff4e4 JG |
1202 | LTTNG_HIDDEN |
1203 | bool lttng_trace_chunk_get(struct lttng_trace_chunk *chunk) | |
1204 | { | |
1205 | return urcu_ref_get_unless_zero(&chunk->ref); | |
1206 | } | |
1207 | ||
1208 | static | |
1209 | void free_lttng_trace_chunk_registry_element(struct rcu_head *node) | |
1210 | { | |
1211 | struct lttng_trace_chunk_registry_element *element = | |
1212 | container_of(node, typeof(*element), rcu_node); | |
1213 | ||
1214 | lttng_trace_chunk_fini(&element->chunk); | |
1215 | free(element); | |
1216 | } | |
1217 | ||
1218 | static | |
1219 | void lttng_trace_chunk_release(struct urcu_ref *ref) | |
1220 | { | |
1221 | struct lttng_trace_chunk *chunk = container_of(ref, typeof(*chunk), | |
1222 | ref); | |
1223 | ||
1224 | if (chunk->close_command.is_set) { | |
1225 | close_command_funcs[chunk->close_command.value](chunk); | |
1226 | } | |
1227 | ||
1228 | if (chunk->in_registry_element) { | |
1229 | struct lttng_trace_chunk_registry_element *element; | |
1230 | ||
1231 | element = container_of(chunk, typeof(*element), chunk); | |
1232 | if (element->registry) { | |
1233 | rcu_read_lock(); | |
1234 | cds_lfht_del(element->registry->ht, | |
1235 | &element->trace_chunk_registry_ht_node); | |
1236 | rcu_read_unlock(); | |
1237 | call_rcu(&element->rcu_node, | |
1238 | free_lttng_trace_chunk_registry_element); | |
1239 | } else { | |
1240 | /* Never published, can be free'd immediately. */ | |
1241 | free_lttng_trace_chunk_registry_element( | |
1242 | &element->rcu_node); | |
1243 | } | |
1244 | } else { | |
1245 | /* Not RCU-protected, free immediately. */ | |
1246 | lttng_trace_chunk_fini(chunk); | |
1247 | free(chunk); | |
1248 | } | |
1249 | } | |
1250 | ||
1251 | LTTNG_HIDDEN | |
1252 | void lttng_trace_chunk_put(struct lttng_trace_chunk *chunk) | |
1253 | { | |
1254 | if (!chunk) { | |
1255 | return; | |
1256 | } | |
1257 | assert(chunk->ref.refcount); | |
1258 | urcu_ref_put(&chunk->ref, lttng_trace_chunk_release); | |
1259 | } | |
1260 | ||
1261 | LTTNG_HIDDEN | |
1262 | struct lttng_trace_chunk_registry *lttng_trace_chunk_registry_create(void) | |
1263 | { | |
1264 | struct lttng_trace_chunk_registry *registry; | |
1265 | ||
1266 | registry = zmalloc(sizeof(*registry)); | |
1267 | if (!registry) { | |
1268 | goto end; | |
1269 | } | |
1270 | ||
1271 | registry->ht = cds_lfht_new(DEFAULT_HT_SIZE, 1, 0, | |
1272 | CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL); | |
1273 | if (!registry->ht) { | |
1274 | goto error; | |
1275 | } | |
1276 | end: | |
1277 | return registry; | |
1278 | error: | |
1279 | lttng_trace_chunk_registry_destroy(registry); | |
8243bf12 | 1280 | return NULL; |
2c5ff4e4 JG |
1281 | } |
1282 | ||
1283 | LTTNG_HIDDEN | |
1284 | void lttng_trace_chunk_registry_destroy( | |
1285 | struct lttng_trace_chunk_registry *registry) | |
1286 | { | |
1287 | if (!registry) { | |
1288 | return; | |
1289 | } | |
1290 | if (registry->ht) { | |
1291 | int ret = cds_lfht_destroy(registry->ht, NULL); | |
1292 | assert(!ret); | |
1293 | } | |
1294 | free(registry); | |
1295 | } | |
1296 | ||
1297 | static | |
1298 | struct lttng_trace_chunk_registry_element * | |
1299 | lttng_trace_chunk_registry_element_create_from_chunk( | |
1300 | struct lttng_trace_chunk *chunk, uint64_t session_id) | |
1301 | { | |
1302 | struct lttng_trace_chunk_registry_element *element = | |
1303 | zmalloc(sizeof(*element)); | |
1304 | ||
1305 | if (!element) { | |
1306 | goto end; | |
1307 | } | |
1308 | cds_lfht_node_init(&element->trace_chunk_registry_ht_node); | |
1309 | element->session_id = session_id; | |
1310 | ||
1311 | element->chunk = *chunk; | |
1312 | lttng_trace_chunk_init(&element->chunk); | |
cbf53d23 JG |
1313 | if (chunk->session_output_directory) { |
1314 | /* Transferred ownership. */ | |
1315 | element->chunk.session_output_directory = | |
1316 | chunk->session_output_directory; | |
1317 | chunk->session_output_directory = NULL; | |
1318 | } | |
1319 | if (chunk->chunk_directory) { | |
1320 | /* Transferred ownership. */ | |
1321 | element->chunk.chunk_directory = chunk->chunk_directory; | |
1322 | chunk->chunk_directory = NULL; | |
2c5ff4e4 JG |
1323 | } |
1324 | /* | |
1325 | * The original chunk becomes invalid; the name attribute is transferred | |
1326 | * to the new chunk instance. | |
1327 | */ | |
1328 | chunk->name = NULL; | |
1329 | element->chunk.in_registry_element = true; | |
1330 | end: | |
1331 | return element; | |
1332 | } | |
1333 | ||
1334 | LTTNG_HIDDEN | |
1335 | struct lttng_trace_chunk * | |
1336 | lttng_trace_chunk_registry_publish_chunk( | |
1337 | struct lttng_trace_chunk_registry *registry, | |
1338 | uint64_t session_id, struct lttng_trace_chunk *chunk) | |
1339 | { | |
1340 | struct lttng_trace_chunk_registry_element *element; | |
1341 | unsigned long element_hash; | |
1342 | ||
1343 | pthread_mutex_lock(&chunk->lock); | |
1344 | element = lttng_trace_chunk_registry_element_create_from_chunk(chunk, | |
1345 | session_id); | |
1346 | pthread_mutex_unlock(&chunk->lock); | |
1347 | if (!element) { | |
1348 | goto end; | |
1349 | } | |
1350 | /* | |
1351 | * chunk is now invalid, the only valid operation is a 'put' from the | |
1352 | * caller. | |
1353 | */ | |
1354 | chunk = NULL; | |
1355 | element_hash = lttng_trace_chunk_registry_element_hash(element); | |
1356 | ||
1357 | rcu_read_lock(); | |
1358 | while (1) { | |
1359 | struct cds_lfht_node *published_node; | |
1360 | struct lttng_trace_chunk *published_chunk; | |
1361 | struct lttng_trace_chunk_registry_element *published_element; | |
1362 | ||
1363 | published_node = cds_lfht_add_unique(registry->ht, | |
1364 | element_hash, | |
1365 | lttng_trace_chunk_registry_element_match, | |
1366 | element, | |
1367 | &element->trace_chunk_registry_ht_node); | |
1368 | if (published_node == &element->trace_chunk_registry_ht_node) { | |
1369 | /* Successfully published the new element. */ | |
1370 | element->registry = registry; | |
1371 | /* Acquire a reference for the caller. */ | |
1372 | if (lttng_trace_chunk_get(&element->chunk)) { | |
1373 | break; | |
1374 | } else { | |
1375 | /* | |
1376 | * Another thread concurrently unpublished the | |
1377 | * trace chunk. This is currently unexpected. | |
1378 | * | |
1379 | * Re-attempt to publish. | |
1380 | */ | |
87cee602 | 1381 | ERR("Attempt to publish a trace chunk to the chunk registry raced with a trace chunk deletion"); |
2c5ff4e4 JG |
1382 | continue; |
1383 | } | |
1384 | } | |
1385 | ||
1386 | /* | |
1387 | * An equivalent trace chunk was published before this trace | |
1388 | * chunk. Attempt to acquire a reference to the one that was | |
1389 | * already published and release the reference to the copy we | |
1390 | * created if successful. | |
1391 | */ | |
1392 | published_element = container_of(published_node, | |
1393 | typeof(*published_element), | |
1394 | trace_chunk_registry_ht_node); | |
1395 | published_chunk = &published_element->chunk; | |
1396 | if (lttng_trace_chunk_get(published_chunk)) { | |
1397 | lttng_trace_chunk_put(&element->chunk); | |
1398 | element = published_element; | |
1399 | break; | |
1400 | } | |
1401 | /* | |
1402 | * A reference to the previously published trace chunk could not | |
1403 | * be acquired. Hence, retry to publish our copy of the trace | |
1404 | * chunk. | |
1405 | */ | |
1406 | } | |
1407 | rcu_read_unlock(); | |
1408 | end: | |
1409 | return element ? &element->chunk : NULL; | |
1410 | } | |
1411 | ||
1412 | /* | |
1413 | * Note that the caller must be registered as an RCU thread. | |
1414 | * However, it does not need to hold the RCU read lock. The RCU read lock is | |
1415 | * acquired to perform the look-up in the registry's hash table and held until | |
1416 | * after a reference to the "found" trace chunk is acquired. | |
1417 | * | |
1418 | * IOW, holding a reference guarantees the existence of the object for the | |
1419 | * caller. | |
1420 | */ | |
1421 | static | |
1422 | struct lttng_trace_chunk *_lttng_trace_chunk_registry_find_chunk( | |
1423 | const struct lttng_trace_chunk_registry *registry, | |
1424 | uint64_t session_id, uint64_t *chunk_id) | |
1425 | { | |
1426 | const struct lttng_trace_chunk_registry_element target_element = { | |
1427 | .chunk.id.is_set = !!chunk_id, | |
1428 | .chunk.id.value = chunk_id ? *chunk_id : 0, | |
1429 | .session_id = session_id, | |
1430 | }; | |
1431 | const unsigned long element_hash = | |
1432 | lttng_trace_chunk_registry_element_hash( | |
1433 | &target_element); | |
1434 | struct cds_lfht_node *published_node; | |
1435 | struct lttng_trace_chunk_registry_element *published_element; | |
1436 | struct lttng_trace_chunk *published_chunk = NULL; | |
1437 | struct cds_lfht_iter iter; | |
1438 | ||
1439 | rcu_read_lock(); | |
1440 | cds_lfht_lookup(registry->ht, | |
1441 | element_hash, | |
1442 | lttng_trace_chunk_registry_element_match, | |
1443 | &target_element, | |
1444 | &iter); | |
1445 | published_node = cds_lfht_iter_get_node(&iter); | |
1446 | if (!published_node) { | |
1447 | goto end; | |
1448 | } | |
1449 | ||
1450 | published_element = container_of(published_node, | |
1451 | typeof(*published_element), | |
1452 | trace_chunk_registry_ht_node); | |
1453 | if (lttng_trace_chunk_get(&published_element->chunk)) { | |
1454 | published_chunk = &published_element->chunk; | |
1455 | } | |
1456 | end: | |
1457 | rcu_read_unlock(); | |
1458 | return published_chunk; | |
1459 | } | |
1460 | ||
1461 | LTTNG_HIDDEN | |
1462 | struct lttng_trace_chunk * | |
1463 | lttng_trace_chunk_registry_find_chunk( | |
1464 | const struct lttng_trace_chunk_registry *registry, | |
1465 | uint64_t session_id, uint64_t chunk_id) | |
1466 | { | |
1467 | return _lttng_trace_chunk_registry_find_chunk(registry, | |
1468 | session_id, &chunk_id); | |
1469 | } | |
1470 | ||
6b584c2e JG |
1471 | LTTNG_HIDDEN |
1472 | int lttng_trace_chunk_registry_chunk_exists( | |
1473 | const struct lttng_trace_chunk_registry *registry, | |
1474 | uint64_t session_id, uint64_t chunk_id, bool *chunk_exists) | |
1475 | { | |
1476 | int ret = 0; | |
1477 | const struct lttng_trace_chunk_registry_element target_element = { | |
1478 | .chunk.id.is_set = true, | |
1479 | .chunk.id.value = chunk_id, | |
1480 | .session_id = session_id, | |
1481 | }; | |
1482 | const unsigned long element_hash = | |
1483 | lttng_trace_chunk_registry_element_hash( | |
1484 | &target_element); | |
1485 | struct cds_lfht_node *published_node; | |
1486 | struct cds_lfht_iter iter; | |
1487 | ||
1488 | rcu_read_lock(); | |
1489 | cds_lfht_lookup(registry->ht, | |
1490 | element_hash, | |
1491 | lttng_trace_chunk_registry_element_match, | |
1492 | &target_element, | |
1493 | &iter); | |
1494 | published_node = cds_lfht_iter_get_node(&iter); | |
1495 | if (!published_node) { | |
1496 | *chunk_exists = false; | |
1497 | goto end; | |
1498 | } | |
1499 | ||
1500 | *chunk_exists = !cds_lfht_is_node_deleted(published_node); | |
1501 | end: | |
1502 | rcu_read_unlock(); | |
1503 | return ret; | |
1504 | } | |
1505 | ||
2c5ff4e4 JG |
1506 | LTTNG_HIDDEN |
1507 | struct lttng_trace_chunk * | |
1508 | lttng_trace_chunk_registry_find_anonymous_chunk( | |
1509 | const struct lttng_trace_chunk_registry *registry, | |
1510 | uint64_t session_id) | |
1511 | { | |
1512 | return _lttng_trace_chunk_registry_find_chunk(registry, | |
1513 | session_id, NULL); | |
1514 | } | |
e10aec8f MD |
1515 | |
1516 | unsigned int lttng_trace_chunk_registry_put_each_chunk( | |
1517 | struct lttng_trace_chunk_registry *registry) | |
1518 | { | |
1519 | struct cds_lfht_iter iter; | |
1520 | struct lttng_trace_chunk_registry_element *chunk_element; | |
1521 | unsigned int trace_chunks_left = 0; | |
1522 | ||
1523 | DBG("Releasing trace chunk registry to all trace chunks"); | |
1524 | rcu_read_lock(); | |
1525 | cds_lfht_for_each_entry(registry->ht, | |
1526 | &iter, chunk_element, trace_chunk_registry_ht_node) { | |
1527 | const char *chunk_id_str = "none"; | |
1528 | char chunk_id_buf[MAX_INT_DEC_LEN(uint64_t)]; | |
1529 | ||
1530 | pthread_mutex_lock(&chunk_element->chunk.lock); | |
1531 | if (chunk_element->chunk.id.is_set) { | |
1532 | int fmt_ret; | |
1533 | ||
1534 | fmt_ret = snprintf(chunk_id_buf, sizeof(chunk_id_buf), | |
1535 | "%" PRIu64, | |
1536 | chunk_element->chunk.id.value); | |
1537 | if (fmt_ret < 0 || fmt_ret >= sizeof(chunk_id_buf)) { | |
1538 | chunk_id_str = "formatting error"; | |
1539 | } else { | |
1540 | chunk_id_str = chunk_id_buf; | |
1541 | } | |
1542 | } | |
1543 | ||
1544 | DBG("Releasing reference to trace chunk: session_id = %" PRIu64 | |
1545 | "chunk_id = %s, name = \"%s\", status = %s", | |
1546 | chunk_element->session_id, | |
1547 | chunk_id_str, | |
1548 | chunk_element->chunk.name ? : "none", | |
1549 | chunk_element->chunk.close_command.is_set ? | |
1550 | "open" : "closed"); | |
1551 | pthread_mutex_unlock(&chunk_element->chunk.lock); | |
1552 | lttng_trace_chunk_put(&chunk_element->chunk); | |
1553 | trace_chunks_left++; | |
1554 | } | |
1555 | rcu_read_unlock(); | |
1556 | DBG("Released reference to %u trace chunks in %s()", trace_chunks_left, | |
1557 | __FUNCTION__); | |
1558 | ||
1559 | return trace_chunks_left; | |
1560 | } |