Commit | Line | Data |
---|---|---|
7972aab2 | 1 | /* |
ab5be9fa | 2 | * Copyright (C) 2013 David Goulet <dgoulet@efficios.com> |
7972aab2 | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: GPL-2.0-only |
7972aab2 | 5 | * |
7972aab2 DG |
6 | */ |
7 | ||
6c1c0768 | 8 | #define _LGPL_SOURCE |
7972aab2 DG |
9 | #include <inttypes.h> |
10 | ||
c9e313bc SM |
11 | #include <common/common.hpp> |
12 | #include <common/hashtable/utils.hpp> | |
7972aab2 | 13 | |
c9e313bc SM |
14 | #include "buffer-registry.hpp" |
15 | #include "fd-limit.hpp" | |
16 | #include "ust-consumer.hpp" | |
17 | #include "lttng-ust-ctl.hpp" | |
18 | #include "lttng-ust-error.hpp" | |
19 | #include "utils.hpp" | |
7972aab2 DG |
20 | |
21 | /* | |
22 | * Set in main.c during initialization process of the daemon. This contains | |
23 | * buffer_reg_uid object which are global registry for per UID buffer. Object | |
24 | * are indexed by session id and matched by the triplet | |
25 | * <session_id/bits_per_long/uid>. | |
26 | */ | |
27 | static struct lttng_ht *buffer_registry_uid; | |
28 | ||
29 | /* | |
30 | * Initialized at the daemon start. This contains buffer_reg_pid object and | |
31 | * indexed by session id. | |
32 | */ | |
33 | static struct lttng_ht *buffer_registry_pid; | |
34 | ||
35 | /* | |
36 | * Match function for the per UID registry hash table. It matches a registry | |
37 | * uid object with the triplet <session_id/abi/uid>. | |
38 | */ | |
39 | static int ht_match_reg_uid(struct cds_lfht_node *node, const void *_key) | |
40 | { | |
41 | struct buffer_reg_uid *reg; | |
42 | const struct buffer_reg_uid *key; | |
43 | ||
a0377dfe FD |
44 | LTTNG_ASSERT(node); |
45 | LTTNG_ASSERT(_key); | |
7972aab2 DG |
46 | |
47 | reg = caa_container_of(node, struct buffer_reg_uid, node.node); | |
a0377dfe | 48 | LTTNG_ASSERT(reg); |
7966af57 | 49 | key = (buffer_reg_uid *) _key; |
7972aab2 DG |
50 | |
51 | if (key->session_id != reg->session_id || | |
52 | key->bits_per_long != reg->bits_per_long || | |
53 | key->uid != reg->uid) { | |
54 | goto no_match; | |
55 | } | |
56 | ||
57 | /* Match */ | |
58 | return 1; | |
59 | no_match: | |
60 | return 0; | |
61 | } | |
62 | ||
63 | /* | |
64 | * Hash function for the per UID registry hash table. This XOR the triplet | |
65 | * together. | |
66 | */ | |
bcd52dd9 | 67 | static unsigned long ht_hash_reg_uid(const void *_key, unsigned long seed) |
7972aab2 DG |
68 | { |
69 | uint64_t xored_key; | |
7966af57 | 70 | const struct buffer_reg_uid *key = (buffer_reg_uid *) _key; |
7972aab2 | 71 | |
a0377dfe | 72 | LTTNG_ASSERT(key); |
7972aab2 DG |
73 | |
74 | xored_key = (uint64_t)(key->session_id ^ key->bits_per_long ^ key->uid); | |
75 | return hash_key_u64(&xored_key, seed); | |
76 | } | |
77 | ||
78 | /* | |
79 | * Initialize global buffer per UID registry. Should only be called ONCE!. | |
80 | */ | |
81 | void buffer_reg_init_uid_registry(void) | |
82 | { | |
83 | /* Should be called once. */ | |
a0377dfe | 84 | LTTNG_ASSERT(!buffer_registry_uid); |
7972aab2 | 85 | buffer_registry_uid = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
a0377dfe | 86 | LTTNG_ASSERT(buffer_registry_uid); |
7972aab2 DG |
87 | buffer_registry_uid->match_fct = ht_match_reg_uid; |
88 | buffer_registry_uid->hash_fct = ht_hash_reg_uid; | |
89 | ||
90 | DBG3("Global buffer per UID registry initialized"); | |
91 | } | |
92 | ||
93 | /* | |
94 | * Allocate and initialize object. Set regp with the object pointer. | |
95 | * | |
96 | * Return 0 on success else a negative value and regp is untouched. | |
97 | */ | |
d9bf3ca4 | 98 | int buffer_reg_uid_create(uint64_t session_id, uint32_t bits_per_long, uid_t uid, |
d7ba1388 | 99 | enum lttng_domain_type domain, struct buffer_reg_uid **regp, |
3d071855 | 100 | const char *root_shm_path, const char *shm_path) |
7972aab2 DG |
101 | { |
102 | int ret = 0; | |
103 | struct buffer_reg_uid *reg = NULL; | |
104 | ||
a0377dfe | 105 | LTTNG_ASSERT(regp); |
7972aab2 | 106 | |
64803277 | 107 | reg = zmalloc<buffer_reg_uid>(); |
7972aab2 DG |
108 | if (!reg) { |
109 | PERROR("zmalloc buffer registry uid"); | |
110 | ret = -ENOMEM; | |
111 | goto error; | |
112 | } | |
113 | ||
64803277 | 114 | reg->registry = zmalloc<buffer_reg_session>(); |
63c861bd | 115 | if (!reg->registry) { |
7972aab2 DG |
116 | PERROR("zmalloc buffer registry uid session"); |
117 | ret = -ENOMEM; | |
118 | goto error; | |
119 | } | |
120 | ||
121 | reg->session_id = session_id; | |
122 | reg->bits_per_long = bits_per_long; | |
123 | reg->uid = uid; | |
124 | reg->domain = domain; | |
d7ba1388 | 125 | if (shm_path[0]) { |
3d071855 MD |
126 | strncpy(reg->root_shm_path, root_shm_path, sizeof(reg->root_shm_path)); |
127 | reg->root_shm_path[sizeof(reg->root_shm_path) - 1] = '\0'; | |
d7ba1388 MD |
128 | strncpy(reg->shm_path, shm_path, sizeof(reg->shm_path)); |
129 | reg->shm_path[sizeof(reg->shm_path) - 1] = '\0'; | |
130 | DBG3("shm path '%s' is assigned to uid buffer registry for session id %" PRIu64, | |
131 | reg->shm_path, session_id); | |
132 | } | |
7972aab2 DG |
133 | reg->registry->channels = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
134 | if (!reg->registry->channels) { | |
135 | ret = -ENOMEM; | |
136 | goto error_session; | |
137 | } | |
138 | ||
139 | cds_lfht_node_init(®->node.node); | |
140 | *regp = reg; | |
141 | ||
d9bf3ca4 | 142 | DBG3("Buffer registry per UID created id: %" PRIu64 ", ABI: %u, uid: %d, domain: %d", |
7972aab2 DG |
143 | session_id, bits_per_long, uid, domain); |
144 | ||
145 | return 0; | |
146 | ||
147 | error_session: | |
148 | free(reg->registry); | |
149 | error: | |
150 | free(reg); | |
151 | return ret; | |
152 | } | |
153 | ||
154 | /* | |
155 | * Add a buffer registry per UID object to the global registry. | |
156 | */ | |
157 | void buffer_reg_uid_add(struct buffer_reg_uid *reg) | |
158 | { | |
159 | struct cds_lfht_node *nodep; | |
160 | struct lttng_ht *ht = buffer_registry_uid; | |
161 | ||
a0377dfe | 162 | LTTNG_ASSERT(reg); |
7972aab2 | 163 | |
d9bf3ca4 | 164 | DBG3("Buffer registry per UID adding to global registry with id: %" PRIu64 , |
7972aab2 DG |
165 | reg->session_id); |
166 | ||
167 | rcu_read_lock(); | |
168 | nodep = cds_lfht_add_unique(ht->ht, ht->hash_fct(reg, lttng_ht_seed), | |
169 | ht->match_fct, reg, ®->node.node); | |
a0377dfe | 170 | LTTNG_ASSERT(nodep == ®->node.node); |
7972aab2 DG |
171 | rcu_read_unlock(); |
172 | } | |
173 | ||
174 | /* | |
175 | * Find a buffer registry per UID object with given params. RCU read side lock | |
176 | * MUST be acquired before calling this and hold on to protect the object. | |
177 | * | |
178 | * Return the object pointer or NULL on error. | |
179 | */ | |
d9bf3ca4 | 180 | struct buffer_reg_uid *buffer_reg_uid_find(uint64_t session_id, |
7972aab2 DG |
181 | uint32_t bits_per_long, uid_t uid) |
182 | { | |
183 | struct lttng_ht_node_u64 *node; | |
184 | struct lttng_ht_iter iter; | |
185 | struct buffer_reg_uid *reg = NULL, key; | |
186 | struct lttng_ht *ht = buffer_registry_uid; | |
187 | ||
48b7cdc2 FD |
188 | ASSERT_RCU_READ_LOCKED(); |
189 | ||
7972aab2 DG |
190 | /* Setup key we are looking for. */ |
191 | key.session_id = session_id; | |
192 | key.bits_per_long = bits_per_long; | |
193 | key.uid = uid; | |
194 | ||
d9bf3ca4 | 195 | DBG3("Buffer registry per UID find id: %" PRIu64 ", ABI: %u, uid: %d", |
7972aab2 DG |
196 | session_id, bits_per_long, uid); |
197 | ||
198 | /* Custom lookup function since it's a different key. */ | |
199 | cds_lfht_lookup(ht->ht, ht->hash_fct(&key, lttng_ht_seed), ht->match_fct, | |
200 | &key, &iter.iter); | |
201 | node = lttng_ht_iter_get_node_u64(&iter); | |
202 | if (!node) { | |
203 | goto end; | |
204 | } | |
0114db0e | 205 | reg = lttng::utils::container_of(node, &buffer_reg_uid::node); |
7972aab2 DG |
206 | |
207 | end: | |
208 | return reg; | |
209 | } | |
210 | ||
211 | /* | |
212 | * Initialize global buffer per PID registry. Should only be called ONCE!. | |
213 | */ | |
214 | void buffer_reg_init_pid_registry(void) | |
215 | { | |
216 | /* Should be called once. */ | |
a0377dfe | 217 | LTTNG_ASSERT(!buffer_registry_pid); |
d9bf3ca4 | 218 | buffer_registry_pid = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
a0377dfe | 219 | LTTNG_ASSERT(buffer_registry_pid); |
7972aab2 DG |
220 | |
221 | DBG3("Global buffer per PID registry initialized"); | |
222 | } | |
223 | ||
224 | /* | |
225 | * Allocate and initialize object. Set regp with the object pointer. | |
226 | * | |
227 | * Return 0 on success else a negative value and regp is untouched. | |
228 | */ | |
d7ba1388 | 229 | int buffer_reg_pid_create(uint64_t session_id, struct buffer_reg_pid **regp, |
3d071855 | 230 | const char *root_shm_path, const char *shm_path) |
7972aab2 DG |
231 | { |
232 | int ret = 0; | |
233 | struct buffer_reg_pid *reg = NULL; | |
234 | ||
a0377dfe | 235 | LTTNG_ASSERT(regp); |
7972aab2 | 236 | |
64803277 | 237 | reg = zmalloc<buffer_reg_pid>(); |
7972aab2 DG |
238 | if (!reg) { |
239 | PERROR("zmalloc buffer registry pid"); | |
240 | ret = -ENOMEM; | |
241 | goto error; | |
242 | } | |
243 | ||
64803277 | 244 | reg->registry = zmalloc<buffer_reg_session>(); |
63c861bd | 245 | if (!reg->registry) { |
7972aab2 DG |
246 | PERROR("zmalloc buffer registry pid session"); |
247 | ret = -ENOMEM; | |
248 | goto error; | |
249 | } | |
250 | ||
251 | /* A cast is done here so we can use the session ID as a u64 ht node. */ | |
252 | reg->session_id = session_id; | |
d7ba1388 | 253 | if (shm_path[0]) { |
3d071855 MD |
254 | strncpy(reg->root_shm_path, root_shm_path, sizeof(reg->root_shm_path)); |
255 | reg->root_shm_path[sizeof(reg->root_shm_path) - 1] = '\0'; | |
d7ba1388 MD |
256 | strncpy(reg->shm_path, shm_path, sizeof(reg->shm_path)); |
257 | reg->shm_path[sizeof(reg->shm_path) - 1] = '\0'; | |
258 | DBG3("shm path '%s' is assigned to pid buffer registry for session id %" PRIu64, | |
259 | reg->shm_path, session_id); | |
260 | } | |
7972aab2 DG |
261 | reg->registry->channels = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
262 | if (!reg->registry->channels) { | |
263 | ret = -ENOMEM; | |
264 | goto error_session; | |
265 | } | |
266 | ||
d9bf3ca4 | 267 | lttng_ht_node_init_u64(®->node, reg->session_id); |
7972aab2 DG |
268 | *regp = reg; |
269 | ||
d9bf3ca4 MD |
270 | DBG3("Buffer registry per PID created with session id: %" PRIu64, |
271 | session_id); | |
7972aab2 DG |
272 | |
273 | return 0; | |
274 | ||
275 | error_session: | |
276 | free(reg->registry); | |
277 | error: | |
278 | free(reg); | |
279 | return ret; | |
280 | } | |
281 | ||
282 | /* | |
283 | * Add a buffer registry per PID object to the global registry. | |
284 | */ | |
285 | void buffer_reg_pid_add(struct buffer_reg_pid *reg) | |
286 | { | |
a0377dfe | 287 | LTTNG_ASSERT(reg); |
7972aab2 | 288 | |
d9bf3ca4 | 289 | DBG3("Buffer registry per PID adding to global registry with id: %" PRIu64, |
7972aab2 DG |
290 | reg->session_id); |
291 | ||
292 | rcu_read_lock(); | |
d9bf3ca4 | 293 | lttng_ht_add_unique_u64(buffer_registry_pid, ®->node); |
7972aab2 DG |
294 | rcu_read_unlock(); |
295 | } | |
296 | ||
297 | /* | |
298 | * Find a buffer registry per PID object with given params. RCU read side lock | |
299 | * MUST be acquired before calling this and hold on to protect the object. | |
300 | * | |
301 | * Return the object pointer or NULL on error. | |
302 | */ | |
d9bf3ca4 | 303 | struct buffer_reg_pid *buffer_reg_pid_find(uint64_t session_id) |
7972aab2 | 304 | { |
d9bf3ca4 | 305 | struct lttng_ht_node_u64 *node; |
7972aab2 DG |
306 | struct lttng_ht_iter iter; |
307 | struct buffer_reg_pid *reg = NULL; | |
308 | struct lttng_ht *ht = buffer_registry_pid; | |
309 | ||
d9bf3ca4 | 310 | DBG3("Buffer registry per PID find id: %" PRIu64, session_id); |
7972aab2 | 311 | |
d9bf3ca4 MD |
312 | lttng_ht_lookup(ht, &session_id, &iter); |
313 | node = lttng_ht_iter_get_node_u64(&iter); | |
7972aab2 DG |
314 | if (!node) { |
315 | goto end; | |
316 | } | |
0114db0e | 317 | reg = lttng::utils::container_of(node, &buffer_reg_pid::node); |
7972aab2 DG |
318 | |
319 | end: | |
320 | return reg; | |
321 | } | |
322 | ||
fb83fe64 JD |
323 | /* |
324 | * Find the consumer channel key from a UST session per-uid channel key. | |
325 | * | |
326 | * Return the matching key or -1 if not found. | |
327 | */ | |
328 | int buffer_reg_uid_consumer_channel_key( | |
329 | struct cds_list_head *buffer_reg_uid_list, | |
76604852 | 330 | uint64_t chan_key, uint64_t *consumer_chan_key) |
fb83fe64 JD |
331 | { |
332 | struct lttng_ht_iter iter; | |
333 | struct buffer_reg_uid *uid_reg = NULL; | |
334 | struct buffer_reg_session *session_reg = NULL; | |
335 | struct buffer_reg_channel *reg_chan; | |
336 | int ret = -1; | |
337 | ||
338 | rcu_read_lock(); | |
339 | /* | |
340 | * For the per-uid registry, we have to iterate since we don't have the | |
341 | * uid and bitness key. | |
342 | */ | |
343 | cds_list_for_each_entry(uid_reg, buffer_reg_uid_list, lnode) { | |
344 | session_reg = uid_reg->registry; | |
345 | cds_lfht_for_each_entry(session_reg->channels->ht, | |
346 | &iter.iter, reg_chan, node.node) { | |
347 | if (reg_chan->key == chan_key) { | |
348 | *consumer_chan_key = reg_chan->consumer_key; | |
349 | ret = 0; | |
350 | goto end; | |
351 | } | |
352 | } | |
353 | } | |
354 | ||
355 | end: | |
356 | rcu_read_unlock(); | |
357 | return ret; | |
358 | } | |
359 | ||
7972aab2 DG |
360 | /* |
361 | * Allocate and initialize a buffer registry channel with the given key. Set | |
362 | * regp with the object pointer. | |
363 | * | |
364 | * Return 0 on success or else a negative value keeping regp untouched. | |
365 | */ | |
366 | int buffer_reg_channel_create(uint64_t key, struct buffer_reg_channel **regp) | |
367 | { | |
368 | struct buffer_reg_channel *reg; | |
369 | ||
a0377dfe | 370 | LTTNG_ASSERT(regp); |
7972aab2 DG |
371 | |
372 | DBG3("Buffer registry channel create with key: %" PRIu64, key); | |
373 | ||
64803277 | 374 | reg = zmalloc<buffer_reg_channel>(); |
7972aab2 DG |
375 | if (!reg) { |
376 | PERROR("zmalloc buffer registry channel"); | |
377 | return -ENOMEM; | |
378 | } | |
379 | ||
380 | reg->key = key; | |
381 | CDS_INIT_LIST_HEAD(®->streams); | |
382 | pthread_mutex_init(®->stream_list_lock, NULL); | |
383 | ||
384 | lttng_ht_node_init_u64(®->node, key); | |
385 | *regp = reg; | |
386 | ||
387 | return 0; | |
388 | } | |
389 | ||
390 | /* | |
391 | * Allocate and initialize a buffer registry stream. Set regp with the object | |
392 | * pointer. | |
393 | * | |
394 | * Return 0 on success or else a negative value keeping regp untouched. | |
395 | */ | |
396 | int buffer_reg_stream_create(struct buffer_reg_stream **regp) | |
397 | { | |
398 | struct buffer_reg_stream *reg; | |
399 | ||
a0377dfe | 400 | LTTNG_ASSERT(regp); |
7972aab2 DG |
401 | |
402 | DBG3("Buffer registry creating stream"); | |
403 | ||
64803277 | 404 | reg = zmalloc<buffer_reg_stream>(); |
7972aab2 DG |
405 | if (!reg) { |
406 | PERROR("zmalloc buffer registry stream"); | |
407 | return -ENOMEM; | |
408 | } | |
409 | ||
410 | *regp = reg; | |
411 | ||
412 | return 0; | |
413 | } | |
414 | ||
415 | /* | |
416 | * Add stream to the list in the channel. | |
417 | */ | |
418 | void buffer_reg_stream_add(struct buffer_reg_stream *stream, | |
419 | struct buffer_reg_channel *channel) | |
420 | { | |
a0377dfe FD |
421 | LTTNG_ASSERT(stream); |
422 | LTTNG_ASSERT(channel); | |
7972aab2 DG |
423 | |
424 | pthread_mutex_lock(&channel->stream_list_lock); | |
425 | cds_list_add_tail(&stream->lnode, &channel->streams); | |
5c786ded | 426 | channel->stream_count++; |
7972aab2 DG |
427 | pthread_mutex_unlock(&channel->stream_list_lock); |
428 | } | |
429 | ||
430 | /* | |
431 | * Add a buffer registry channel object to the given session. | |
432 | */ | |
433 | void buffer_reg_channel_add(struct buffer_reg_session *session, | |
434 | struct buffer_reg_channel *channel) | |
435 | { | |
a0377dfe FD |
436 | LTTNG_ASSERT(session); |
437 | LTTNG_ASSERT(channel); | |
7972aab2 DG |
438 | |
439 | rcu_read_lock(); | |
440 | lttng_ht_add_unique_u64(session->channels, &channel->node); | |
441 | rcu_read_unlock(); | |
442 | } | |
443 | ||
444 | /* | |
445 | * Find a buffer registry channel object with the given key. RCU read side lock | |
446 | * MUST be acquired and hold on until the object reference is not needed | |
447 | * anymore. | |
448 | * | |
449 | * Return the object pointer or NULL on error. | |
450 | */ | |
451 | struct buffer_reg_channel *buffer_reg_channel_find(uint64_t key, | |
452 | struct buffer_reg_uid *reg) | |
453 | { | |
454 | struct lttng_ht_node_u64 *node; | |
455 | struct lttng_ht_iter iter; | |
456 | struct buffer_reg_channel *chan = NULL; | |
457 | struct lttng_ht *ht; | |
458 | ||
a0377dfe | 459 | LTTNG_ASSERT(reg); |
7972aab2 DG |
460 | |
461 | switch (reg->domain) { | |
462 | case LTTNG_DOMAIN_UST: | |
463 | ht = reg->registry->channels; | |
464 | break; | |
465 | default: | |
a0377dfe | 466 | abort(); |
7972aab2 DG |
467 | goto end; |
468 | } | |
469 | ||
470 | lttng_ht_lookup(ht, &key, &iter); | |
471 | node = lttng_ht_iter_get_node_u64(&iter); | |
472 | if (!node) { | |
473 | goto end; | |
474 | } | |
0114db0e | 475 | chan = lttng::utils::container_of(node, &buffer_reg_channel::node); |
7972aab2 DG |
476 | |
477 | end: | |
478 | return chan; | |
479 | } | |
480 | ||
481 | /* | |
482 | * Destroy a buffer registry stream with the given domain. | |
483 | */ | |
484 | void buffer_reg_stream_destroy(struct buffer_reg_stream *regp, | |
485 | enum lttng_domain_type domain) | |
486 | { | |
487 | if (!regp) { | |
488 | return; | |
489 | } | |
490 | ||
491 | DBG3("Buffer registry stream destroy with handle %d", | |
492 | regp->obj.ust->handle); | |
493 | ||
494 | switch (domain) { | |
495 | case LTTNG_DOMAIN_UST: | |
496 | { | |
497 | int ret; | |
498 | ||
fb45065e | 499 | ret = ust_app_release_object(NULL, regp->obj.ust); |
7972aab2 DG |
500 | if (ret < 0 && ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { |
501 | ERR("Buffer reg stream release obj handle %d failed with ret %d", | |
502 | regp->obj.ust->handle, ret); | |
503 | } | |
504 | free(regp->obj.ust); | |
505 | lttng_fd_put(LTTNG_FD_APPS, 2); | |
506 | break; | |
507 | } | |
508 | default: | |
a0377dfe | 509 | abort(); |
7972aab2 DG |
510 | } |
511 | ||
512 | free(regp); | |
513 | return; | |
514 | } | |
515 | ||
516 | /* | |
517 | * Remove buffer registry channel object from the session hash table. RCU read | |
518 | * side lock MUST be acquired before calling this. | |
519 | */ | |
520 | void buffer_reg_channel_remove(struct buffer_reg_session *session, | |
521 | struct buffer_reg_channel *regp) | |
522 | { | |
523 | int ret; | |
524 | struct lttng_ht_iter iter; | |
525 | ||
a0377dfe FD |
526 | LTTNG_ASSERT(session); |
527 | LTTNG_ASSERT(regp); | |
7972aab2 DG |
528 | |
529 | iter.iter.node = ®p->node.node; | |
530 | ret = lttng_ht_del(session->channels, &iter); | |
a0377dfe | 531 | LTTNG_ASSERT(!ret); |
7972aab2 DG |
532 | } |
533 | ||
534 | /* | |
535 | * Destroy a buffer registry channel with the given domain. | |
536 | */ | |
537 | void buffer_reg_channel_destroy(struct buffer_reg_channel *regp, | |
538 | enum lttng_domain_type domain) | |
539 | { | |
540 | if (!regp) { | |
541 | return; | |
542 | } | |
543 | ||
07d2ae95 | 544 | DBG3("Buffer registry channel destroy with key %" PRIu32, regp->key); |
7972aab2 DG |
545 | |
546 | switch (domain) { | |
547 | case LTTNG_DOMAIN_UST: | |
548 | { | |
549 | int ret; | |
550 | struct buffer_reg_stream *sreg, *stmp; | |
551 | /* Wipe stream */ | |
552 | cds_list_for_each_entry_safe(sreg, stmp, ®p->streams, lnode) { | |
553 | cds_list_del(&sreg->lnode); | |
5c786ded | 554 | regp->stream_count--; |
7972aab2 DG |
555 | buffer_reg_stream_destroy(sreg, domain); |
556 | } | |
557 | ||
55d7e860 | 558 | if (regp->obj.ust) { |
fb45065e | 559 | ret = ust_app_release_object(NULL, regp->obj.ust); |
55d7e860 MD |
560 | if (ret < 0 && ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { |
561 | ERR("Buffer reg channel release obj handle %d failed with ret %d", | |
562 | regp->obj.ust->handle, ret); | |
563 | } | |
564 | free(regp->obj.ust); | |
7972aab2 | 565 | } |
7972aab2 DG |
566 | lttng_fd_put(LTTNG_FD_APPS, 1); |
567 | break; | |
568 | } | |
569 | default: | |
a0377dfe | 570 | abort(); |
7972aab2 DG |
571 | } |
572 | ||
573 | free(regp); | |
574 | return; | |
575 | } | |
576 | ||
577 | /* | |
578 | * Destroy a buffer registry session with the given domain. | |
579 | */ | |
36b588ed | 580 | static void buffer_reg_session_destroy(struct buffer_reg_session *regp, |
7972aab2 DG |
581 | enum lttng_domain_type domain) |
582 | { | |
583 | int ret; | |
584 | struct lttng_ht_iter iter; | |
585 | struct buffer_reg_channel *reg_chan; | |
586 | ||
587 | DBG3("Buffer registry session destroy"); | |
588 | ||
589 | /* Destroy all channels. */ | |
590 | rcu_read_lock(); | |
591 | cds_lfht_for_each_entry(regp->channels->ht, &iter.iter, reg_chan, | |
592 | node.node) { | |
593 | ret = lttng_ht_del(regp->channels, &iter); | |
a0377dfe | 594 | LTTNG_ASSERT(!ret); |
7972aab2 DG |
595 | buffer_reg_channel_destroy(reg_chan, domain); |
596 | } | |
7972aab2 DG |
597 | rcu_read_unlock(); |
598 | ||
3c339053 | 599 | lttng_ht_destroy(regp->channels); |
36b588ed | 600 | |
7972aab2 DG |
601 | switch (domain) { |
602 | case LTTNG_DOMAIN_UST: | |
603 | ust_registry_session_destroy(regp->reg.ust); | |
7972aab2 DG |
604 | break; |
605 | default: | |
a0377dfe | 606 | abort(); |
7972aab2 DG |
607 | } |
608 | ||
609 | free(regp); | |
610 | return; | |
611 | } | |
612 | ||
613 | /* | |
36b588ed | 614 | * Remove buffer registry UID object from the global hash table. |
7972aab2 DG |
615 | */ |
616 | void buffer_reg_uid_remove(struct buffer_reg_uid *regp) | |
617 | { | |
618 | int ret; | |
619 | struct lttng_ht_iter iter; | |
620 | ||
a0377dfe | 621 | LTTNG_ASSERT(regp); |
7972aab2 | 622 | |
36b588ed | 623 | rcu_read_lock(); |
7972aab2 DG |
624 | iter.iter.node = ®p->node.node; |
625 | ret = lttng_ht_del(buffer_registry_uid, &iter); | |
a0377dfe | 626 | LTTNG_ASSERT(!ret); |
36b588ed | 627 | rcu_read_unlock(); |
7972aab2 DG |
628 | } |
629 | ||
630 | static void rcu_free_buffer_reg_uid(struct rcu_head *head) | |
631 | { | |
632 | struct lttng_ht_node_u64 *node = | |
0114db0e | 633 | lttng::utils::container_of(head, <tng_ht_node_u64::head); |
7972aab2 | 634 | struct buffer_reg_uid *reg = |
0114db0e | 635 | lttng::utils::container_of(node, &buffer_reg_uid::node); |
7972aab2 DG |
636 | |
637 | buffer_reg_session_destroy(reg->registry, reg->domain); | |
638 | free(reg); | |
639 | } | |
640 | ||
641 | static void rcu_free_buffer_reg_pid(struct rcu_head *head) | |
642 | { | |
d9bf3ca4 | 643 | struct lttng_ht_node_u64 *node = |
0114db0e | 644 | lttng::utils::container_of(head, <tng_ht_node_u64::head); |
7972aab2 | 645 | struct buffer_reg_pid *reg = |
0114db0e | 646 | lttng::utils::container_of(node, &buffer_reg_pid::node); |
7972aab2 DG |
647 | |
648 | buffer_reg_session_destroy(reg->registry, LTTNG_DOMAIN_UST); | |
649 | free(reg); | |
650 | } | |
651 | ||
652 | /* | |
653 | * Destroy buffer registry per UID. The given pointer is NOT removed from any | |
654 | * list or hash table. Use buffer_reg_pid_remove() before calling this function | |
655 | * for the case that the object is in the global hash table. | |
656 | */ | |
657 | void buffer_reg_uid_destroy(struct buffer_reg_uid *regp, | |
658 | struct consumer_output *consumer) | |
659 | { | |
660 | struct consumer_socket *socket; | |
661 | ||
662 | if (!regp) { | |
663 | return; | |
664 | } | |
665 | ||
d9bf3ca4 | 666 | DBG3("Buffer registry per UID destroy with id: %" PRIu64 ", ABI: %u, uid: %d", |
7972aab2 DG |
667 | regp->session_id, regp->bits_per_long, regp->uid); |
668 | ||
669 | if (!consumer) { | |
670 | goto destroy; | |
671 | } | |
672 | ||
36b588ed | 673 | rcu_read_lock(); |
7972aab2 DG |
674 | /* Get the right socket from the consumer object. */ |
675 | socket = consumer_find_socket_by_bitness(regp->bits_per_long, | |
676 | consumer); | |
677 | if (!socket) { | |
36b588ed | 678 | goto unlock; |
7972aab2 DG |
679 | } |
680 | ||
681 | switch (regp->domain) { | |
682 | case LTTNG_DOMAIN_UST: | |
aeeb48c6 | 683 | if (regp->registry->reg.ust->_metadata_key) { |
7972aab2 DG |
684 | /* Return value does not matter. This call will print errors. */ |
685 | (void) consumer_close_metadata(socket, | |
aeeb48c6 | 686 | regp->registry->reg.ust->_metadata_key); |
7972aab2 DG |
687 | } |
688 | break; | |
689 | default: | |
a0377dfe | 690 | abort(); |
36b588ed | 691 | rcu_read_unlock(); |
7972aab2 DG |
692 | return; |
693 | } | |
694 | ||
36b588ed MD |
695 | unlock: |
696 | rcu_read_unlock(); | |
7972aab2 DG |
697 | destroy: |
698 | call_rcu(®p->node.head, rcu_free_buffer_reg_uid); | |
699 | } | |
700 | ||
701 | /* | |
702 | * Remove buffer registry UID object from the global hash table. RCU read side | |
703 | * lock MUST be acquired before calling this. | |
704 | */ | |
705 | void buffer_reg_pid_remove(struct buffer_reg_pid *regp) | |
706 | { | |
707 | int ret; | |
708 | struct lttng_ht_iter iter; | |
709 | ||
a0377dfe | 710 | LTTNG_ASSERT(regp); |
7972aab2 DG |
711 | |
712 | iter.iter.node = ®p->node.node; | |
713 | ret = lttng_ht_del(buffer_registry_pid, &iter); | |
a0377dfe | 714 | LTTNG_ASSERT(!ret); |
7972aab2 DG |
715 | } |
716 | ||
717 | /* | |
718 | * Destroy buffer registry per PID. The pointer is NOT removed from the global | |
719 | * hash table. Call buffer_reg_pid_remove() before that if the object was | |
720 | * previously added to the global hash table. | |
721 | */ | |
722 | void buffer_reg_pid_destroy(struct buffer_reg_pid *regp) | |
723 | { | |
724 | if (!regp) { | |
725 | return; | |
726 | } | |
727 | ||
d9bf3ca4 MD |
728 | DBG3("Buffer registry per PID destroy with id: %" PRIu64, |
729 | regp->session_id); | |
7972aab2 DG |
730 | |
731 | /* This registry is only used by UST. */ | |
732 | call_rcu(®p->node.head, rcu_free_buffer_reg_pid); | |
733 | } | |
734 | ||
735 | /* | |
736 | * Destroy per PID and UID registry hash table. | |
737 | */ | |
738 | void buffer_reg_destroy_registries(void) | |
739 | { | |
740 | DBG3("Buffer registry destroy all registry"); | |
3c339053 FD |
741 | lttng_ht_destroy(buffer_registry_uid); |
742 | lttng_ht_destroy(buffer_registry_pid); | |
7972aab2 | 743 | } |