Commit | Line | Data |
---|---|---|
91d76f53 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
82a3637f DG |
6 | * as published by the Free Software Foundation; only version 2 |
7 | * of the License. | |
91d76f53 DG |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <errno.h> | |
21 | #include <pthread.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
099e26bd | 24 | #include <string.h> |
aba8e916 DG |
25 | #include <sys/stat.h> |
26 | #include <sys/types.h> | |
099e26bd | 27 | #include <unistd.h> |
91d76f53 | 28 | |
1e307fab | 29 | #include <lttngerr.h> |
48842b30 | 30 | #include <lttng-share.h> |
1e307fab | 31 | |
f6a9efaa | 32 | #include "hashtable.h" |
56fff090 | 33 | #include "ust-app.h" |
48842b30 | 34 | #include "ust-consumer.h" |
d80a6244 DG |
35 | #include "ust-ctl.h" |
36 | ||
37 | /* | |
38 | * Delete ust app event safely. RCU read lock must be held before calling | |
39 | * this function. | |
40 | */ | |
41 | static void delete_ust_app_event(int sock, struct ust_app_event *ua_event) | |
42 | { | |
43 | /* TODO : remove context */ | |
44 | //struct ust_app_ctx *ltctx; | |
45 | //cds_lfht_for_each_entry(lte->ctx, &iter, ltctx, node) { | |
46 | // delete_ust_app_ctx(sock, ltctx); | |
47 | //} | |
48 | ||
49 | ustctl_release_object(sock, ua_event->obj); | |
50 | free(ua_event); | |
51 | } | |
52 | ||
53 | /* | |
54 | * Delete ust app stream safely. RCU read lock must be held before calling | |
55 | * this function. | |
56 | */ | |
57 | static void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream) | |
58 | { | |
59 | //TODO | |
60 | //stream is used for passing to consumer. | |
61 | //send_channel_streams is responsible for freeing the streams. | |
62 | //note that this will not play well with flight recorder mode: | |
63 | //we might need a criterion to discard the streams. | |
64 | } | |
65 | ||
66 | /* | |
67 | * Delete ust app channel safely. RCU read lock must be held before calling | |
68 | * this function. | |
69 | */ | |
70 | static void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan) | |
71 | { | |
72 | int ret; | |
73 | struct cds_lfht_iter iter; | |
74 | struct ust_app_event *ua_event; | |
75 | struct ltt_ust_stream *stream, *stmp; | |
76 | ||
77 | cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) { | |
78 | delete_ust_app_stream(sock, stream); | |
79 | } | |
80 | ||
81 | /* TODO : remove channel context */ | |
82 | //cds_lfht_for_each_entry(ltc->ctx, &iter, ltctx, node) { | |
83 | // hashtable_del(ltc->ctx, &iter); | |
84 | // delete_ust_app_ctx(sock, ltctx); | |
85 | //} | |
86 | //ret = hashtable_destroy(ltc->ctx); | |
87 | ||
88 | cds_lfht_for_each_entry(ua_chan->events, &iter, ua_event, node) { | |
89 | hashtable_del(ua_chan->events, &iter); | |
90 | delete_ust_app_event(sock, ua_event); | |
91 | } | |
92 | ||
93 | ret = hashtable_destroy(ua_chan->events); | |
94 | if (ret < 0) { | |
95 | ERR("UST app destroy session hashtable failed"); | |
96 | goto error; | |
97 | } | |
98 | ||
99 | error: | |
100 | return; | |
101 | } | |
102 | ||
103 | /* | |
104 | * Delete ust app session safely. RCU read lock must be held before calling | |
105 | * this function. | |
106 | */ | |
107 | static void delete_ust_app_session(int sock, | |
108 | struct ust_app_session *ua_sess) | |
109 | { | |
110 | int ret; | |
111 | struct cds_lfht_iter iter; | |
112 | struct ust_app_channel *ua_chan; | |
113 | ||
114 | if (ua_sess->metadata) { | |
115 | /* | |
116 | * We do NOT release the stream object and metadata object since they | |
117 | * are release when fds are sent to the consumer. | |
118 | */ | |
119 | } | |
120 | ||
121 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { | |
122 | hashtable_del(ua_sess->channels, &iter); | |
123 | delete_ust_app_channel(sock, ua_chan); | |
124 | } | |
125 | ||
126 | ret = hashtable_destroy(ua_sess->channels); | |
127 | if (ret < 0) { | |
128 | ERR("UST app destroy session hashtable failed"); | |
129 | goto error; | |
130 | } | |
131 | ||
132 | error: | |
133 | return; | |
134 | } | |
91d76f53 DG |
135 | |
136 | /* | |
099e26bd | 137 | * Delete a traceable application structure from the global list. |
91d76f53 | 138 | */ |
f6a9efaa | 139 | static void delete_ust_app(struct ust_app *lta) |
91d76f53 | 140 | { |
f6a9efaa DG |
141 | int ret; |
142 | struct cds_lfht_node *node; | |
143 | struct cds_lfht_iter iter; | |
d80a6244 | 144 | struct ust_app_session *lts; |
44d3bd01 | 145 | |
f6a9efaa | 146 | rcu_read_lock(); |
44d3bd01 | 147 | |
f6a9efaa DG |
148 | /* Remove from apps hash table */ |
149 | node = hashtable_lookup(ust_app_ht, | |
150 | (void *) ((unsigned long) lta->key.pid), sizeof(void *), &iter); | |
151 | if (node == NULL) { | |
152 | ERR("UST app pid %d not found in hash table", lta->key.pid); | |
d80a6244 | 153 | goto end; |
f6a9efaa DG |
154 | } else { |
155 | ret = hashtable_del(ust_app_ht, &iter); | |
156 | if (ret) { | |
157 | ERR("UST app unable to delete app %d from hash table", | |
158 | lta->key.pid); | |
159 | } else { | |
160 | DBG2("UST app pid %d deleted", lta->key.pid); | |
56fff090 DG |
161 | } |
162 | } | |
163 | ||
f6a9efaa DG |
164 | /* Remove from key hash table */ |
165 | node = hashtable_lookup(ust_app_sock_key_map, | |
166 | (void *) ((unsigned long) lta->key.sock), sizeof(void *), &iter); | |
167 | if (node == NULL) { | |
168 | ERR("UST app key %d not found in key hash table", lta->key.sock); | |
d80a6244 | 169 | goto end; |
f6a9efaa DG |
170 | } else { |
171 | ret = hashtable_del(ust_app_sock_key_map, &iter); | |
172 | if (ret) { | |
173 | ERR("UST app unable to delete app sock %d from key hash table", | |
174 | lta->key.sock); | |
175 | } else { | |
176 | DBG2("UST app pair sock %d key %d deleted", | |
177 | lta->key.sock, lta->key.pid); | |
178 | } | |
179 | } | |
180 | ||
d80a6244 DG |
181 | /* Socket is already closed at this point */ |
182 | ||
183 | /* Delete ust app sessions info */ | |
184 | if (lta->sock_closed) { | |
185 | lta->key.sock = -1; | |
186 | } | |
187 | ||
188 | cds_lfht_for_each_entry(lta->sessions, &iter, lts, node) { | |
189 | hashtable_del(lta->sessions, &iter); | |
190 | delete_ust_app_session(lta->key.sock, lts); | |
191 | } | |
f6a9efaa | 192 | |
d80a6244 DG |
193 | ret = hashtable_destroy(lta->sessions); |
194 | if (ret < 0) { | |
195 | ERR("UST app destroy session hashtable failed"); | |
196 | goto end; | |
197 | } | |
198 | ||
199 | if (lta->key.sock >= 0) { | |
200 | close(lta->key.sock); | |
201 | } | |
202 | ||
203 | free(lta); | |
204 | end: | |
f6a9efaa | 205 | rcu_read_unlock(); |
099e26bd DG |
206 | } |
207 | ||
208 | /* | |
f6a9efaa | 209 | * URCU intermediate call to delete an UST app. |
099e26bd | 210 | */ |
f6a9efaa | 211 | static void delete_ust_app_rcu(struct rcu_head *head) |
099e26bd | 212 | { |
f6a9efaa DG |
213 | struct cds_lfht_node *node = |
214 | caa_container_of(head, struct cds_lfht_node, head); | |
215 | struct ust_app *app = | |
216 | caa_container_of(node, struct ust_app, node); | |
217 | ||
218 | delete_ust_app(app); | |
099e26bd DG |
219 | } |
220 | ||
221 | /* | |
421cb601 DG |
222 | * Find an ust_app using the sock and return it. RCU read side lock must be |
223 | * held before calling this helper function. | |
099e26bd | 224 | */ |
f6a9efaa | 225 | static struct ust_app *find_app_by_sock(int sock) |
099e26bd | 226 | { |
f6a9efaa DG |
227 | struct cds_lfht_node *node; |
228 | struct ust_app_key *key; | |
229 | struct cds_lfht_iter iter; | |
f6a9efaa | 230 | |
f6a9efaa DG |
231 | node = hashtable_lookup(ust_app_sock_key_map, |
232 | (void *)((unsigned long) sock), sizeof(void *), &iter); | |
233 | if (node == NULL) { | |
234 | DBG2("UST app find by sock %d key not found", sock); | |
f6a9efaa DG |
235 | goto error; |
236 | } | |
237 | ||
238 | key = caa_container_of(node, struct ust_app_key, node); | |
239 | ||
240 | node = hashtable_lookup(ust_app_ht, | |
241 | (void *)((unsigned long) key->pid), sizeof(void *), &iter); | |
242 | if (node == NULL) { | |
243 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
244 | goto error; |
245 | } | |
f6a9efaa DG |
246 | return caa_container_of(node, struct ust_app, node); |
247 | ||
248 | error: | |
249 | return NULL; | |
099e26bd DG |
250 | } |
251 | ||
252 | /* | |
f6a9efaa | 253 | * Return pointer to traceable apps list. |
099e26bd | 254 | */ |
f6a9efaa | 255 | struct cds_lfht *ust_app_get_ht(void) |
099e26bd | 256 | { |
f6a9efaa | 257 | return ust_app_ht; |
91d76f53 DG |
258 | } |
259 | ||
0177d773 | 260 | /* |
f6a9efaa | 261 | * Return ust app pointer or NULL if not found. |
0177d773 | 262 | */ |
f6a9efaa | 263 | struct ust_app *ust_app_find_by_pid(pid_t pid) |
0177d773 | 264 | { |
f6a9efaa DG |
265 | struct cds_lfht_node *node; |
266 | struct cds_lfht_iter iter; | |
0177d773 | 267 | |
f6a9efaa DG |
268 | rcu_read_lock(); |
269 | node = hashtable_lookup(ust_app_ht, | |
270 | (void *)((unsigned long) pid), sizeof(void *), &iter); | |
271 | if (node == NULL) { | |
f6a9efaa DG |
272 | DBG2("UST app no found with pid %d", pid); |
273 | goto error; | |
0177d773 | 274 | } |
f6a9efaa | 275 | rcu_read_unlock(); |
0177d773 | 276 | |
f6a9efaa | 277 | DBG2("Found UST app by pid %d", pid); |
44d3bd01 | 278 | |
f6a9efaa DG |
279 | return caa_container_of(node, struct ust_app, node); |
280 | ||
281 | error: | |
ee2fd646 | 282 | rcu_read_unlock(); |
0177d773 DG |
283 | return NULL; |
284 | } | |
285 | ||
91d76f53 | 286 | /* |
56fff090 | 287 | * Using pid and uid (of the app), allocate a new ust_app struct and |
050349bb | 288 | * add it to the global traceable app list. |
91d76f53 | 289 | * |
050349bb | 290 | * On success, return 0, else return malloc ENOMEM. |
91d76f53 | 291 | */ |
56fff090 | 292 | int ust_app_register(struct ust_register_msg *msg, int sock) |
91d76f53 | 293 | { |
56fff090 | 294 | struct ust_app *lta; |
91d76f53 | 295 | |
d80a6244 | 296 | lta = zmalloc(sizeof(struct ust_app)); |
91d76f53 | 297 | if (lta == NULL) { |
48842b30 | 298 | PERROR("malloc"); |
91d76f53 DG |
299 | return -ENOMEM; |
300 | } | |
301 | ||
099e26bd DG |
302 | lta->uid = msg->uid; |
303 | lta->gid = msg->gid; | |
f6a9efaa | 304 | lta->key.pid = msg->pid; |
099e26bd DG |
305 | lta->ppid = msg->ppid; |
306 | lta->v_major = msg->major; | |
307 | lta->v_minor = msg->minor; | |
f6a9efaa | 308 | lta->key.sock = sock; |
099e26bd DG |
309 | strncpy(lta->name, msg->name, sizeof(lta->name)); |
310 | lta->name[16] = '\0'; | |
f6a9efaa DG |
311 | hashtable_node_init(<a->node, (void *)((unsigned long)lta->key.pid), |
312 | sizeof(void *)); | |
48842b30 DG |
313 | |
314 | /* Session hashtable */ | |
315 | lta->sessions = hashtable_new(0); | |
f6a9efaa DG |
316 | |
317 | /* Set sock key map */ | |
318 | hashtable_node_init(<a->key.node, (void *)((unsigned long)lta->key.sock), | |
319 | sizeof(void *)); | |
099e26bd | 320 | |
f6a9efaa DG |
321 | rcu_read_lock(); |
322 | hashtable_add_unique(ust_app_ht, <a->node); | |
323 | hashtable_add_unique(ust_app_sock_key_map, <a->key.node); | |
324 | rcu_read_unlock(); | |
099e26bd DG |
325 | |
326 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
f6a9efaa DG |
327 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, |
328 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
91d76f53 DG |
329 | |
330 | return 0; | |
331 | } | |
332 | ||
333 | /* | |
050349bb DG |
334 | * Unregister app by removing it from the global traceable app list and freeing |
335 | * the data struct. | |
099e26bd DG |
336 | * |
337 | * The socket is already closed at this point so no close to sock. | |
91d76f53 | 338 | */ |
56fff090 | 339 | void ust_app_unregister(int sock) |
91d76f53 | 340 | { |
56fff090 | 341 | struct ust_app *lta; |
421cb601 DG |
342 | struct cds_lfht_node *node; |
343 | struct cds_lfht_iter iter; | |
91d76f53 | 344 | |
421cb601 | 345 | rcu_read_lock(); |
099e26bd | 346 | lta = find_app_by_sock(sock); |
421cb601 DG |
347 | if (lta == NULL) { |
348 | ERR("Unregister app sock %d not found!", sock); | |
349 | goto error; | |
350 | } | |
351 | ||
352 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
353 | ||
354 | /* Get the node reference for a call_rcu */ | |
355 | node = hashtable_lookup(ust_app_ht, | |
356 | (void *)((unsigned long) lta->key.pid), sizeof(void *), &iter); | |
357 | if (node == NULL) { | |
358 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
359 | goto error; | |
91d76f53 | 360 | } |
421cb601 | 361 | |
d80a6244 DG |
362 | /* We got called because the socket was closed on the remote end. */ |
363 | close(sock); | |
364 | /* Using a flag because we still need "sock" as a key. */ | |
365 | lta->sock_closed = 1; | |
421cb601 | 366 | call_rcu(&node->head, delete_ust_app_rcu); |
421cb601 DG |
367 | error: |
368 | rcu_read_unlock(); | |
369 | return; | |
91d76f53 DG |
370 | } |
371 | ||
372 | /* | |
050349bb | 373 | * Return traceable_app_count |
91d76f53 | 374 | */ |
f6a9efaa | 375 | unsigned long ust_app_list_count(void) |
91d76f53 | 376 | { |
f6a9efaa | 377 | unsigned long count; |
91d76f53 | 378 | |
f6a9efaa DG |
379 | rcu_read_lock(); |
380 | count = hashtable_get_count(ust_app_ht); | |
381 | rcu_read_unlock(); | |
91d76f53 | 382 | |
099e26bd | 383 | return count; |
91d76f53 DG |
384 | } |
385 | ||
b551a063 DG |
386 | /* |
387 | * Fill events array with all events name of all registered apps. | |
388 | */ | |
389 | int ust_app_list_events(struct lttng_event **events) | |
390 | { | |
391 | int ret, handle; | |
392 | size_t nbmem, count = 0; | |
393 | struct cds_lfht_iter iter; | |
394 | struct ust_app *app; | |
395 | struct lttng_event *tmp; | |
396 | ||
397 | nbmem = UST_APP_EVENT_LIST_SIZE; | |
398 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
399 | if (tmp == NULL) { | |
400 | PERROR("zmalloc ust app events"); | |
401 | ret = -ENOMEM; | |
402 | goto error; | |
403 | } | |
404 | ||
405 | rcu_read_lock(); | |
406 | ||
407 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
408 | handle = ustctl_tracepoint_list(app->key.sock); | |
409 | if (handle < 0) { | |
410 | ERR("UST app list events getting handle failed for app pid %d", | |
411 | app->key.pid); | |
412 | continue; | |
413 | } | |
414 | ||
415 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, | |
416 | tmp[count].name)) != -ENOENT) { | |
417 | if (count > nbmem) { | |
418 | DBG2("Reallocating event list from %zu to %zu bytes", nbmem, | |
419 | nbmem + UST_APP_EVENT_LIST_SIZE); | |
420 | nbmem += UST_APP_EVENT_LIST_SIZE; | |
421 | tmp = realloc(tmp, nbmem); | |
422 | if (tmp == NULL) { | |
423 | PERROR("realloc ust app events"); | |
424 | ret = -ENOMEM; | |
425 | goto rcu_error; | |
426 | } | |
427 | } | |
428 | ||
429 | tmp[count].type = LTTNG_UST_TRACEPOINT; | |
430 | tmp[count].pid = app->key.pid; | |
431 | count++; | |
432 | } | |
433 | } | |
434 | ||
435 | ret = count; | |
436 | *events = tmp; | |
437 | ||
438 | DBG2("UST app list events done (%zu events)", count); | |
439 | ||
440 | rcu_error: | |
441 | rcu_read_unlock(); | |
442 | error: | |
443 | return ret; | |
444 | } | |
445 | ||
91d76f53 | 446 | /* |
099e26bd | 447 | * Free and clean all traceable apps of the global list. |
91d76f53 | 448 | */ |
56fff090 | 449 | void ust_app_clean_list(void) |
91d76f53 | 450 | { |
f6a9efaa DG |
451 | int ret; |
452 | struct cds_lfht_node *node; | |
453 | struct cds_lfht_iter iter; | |
454 | ||
455 | DBG2("UST app clean hash table"); | |
456 | ||
457 | rcu_read_lock(); | |
458 | ||
459 | hashtable_get_first(ust_app_ht, &iter); | |
460 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
461 | ret = hashtable_del(ust_app_ht, &iter); | |
462 | if (!ret) { | |
463 | call_rcu(&node->head, delete_ust_app_rcu); | |
464 | } | |
465 | hashtable_get_next(ust_app_ht, &iter); | |
91d76f53 | 466 | } |
f6a9efaa DG |
467 | |
468 | rcu_read_unlock(); | |
469 | } | |
470 | ||
471 | /* | |
472 | * Init UST app hash table. | |
473 | */ | |
474 | void ust_app_ht_alloc(void) | |
475 | { | |
476 | ust_app_ht = hashtable_new(0); | |
477 | ust_app_sock_key_map = hashtable_new(0); | |
91d76f53 | 478 | } |
48842b30 DG |
479 | |
480 | /* | |
481 | * Alloc new UST app session. | |
482 | */ | |
421cb601 | 483 | static struct ust_app_session *alloc_ust_app_session(void) |
48842b30 DG |
484 | { |
485 | struct ust_app_session *ua_sess; | |
486 | ||
421cb601 | 487 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
488 | ua_sess = zmalloc(sizeof(struct ust_app_session)); |
489 | if (ua_sess == NULL) { | |
490 | PERROR("malloc"); | |
491 | goto error; | |
492 | } | |
493 | ||
48842b30 DG |
494 | ua_sess->handle = -1; |
495 | ua_sess->channels = hashtable_new_str(0); | |
48842b30 DG |
496 | |
497 | return ua_sess; | |
498 | ||
499 | error: | |
500 | return NULL; | |
501 | } | |
502 | ||
421cb601 DG |
503 | /* |
504 | * Alloc new UST app channel. | |
505 | */ | |
506 | static struct ust_app_channel *alloc_ust_app_channel(char *name) | |
48842b30 DG |
507 | { |
508 | struct ust_app_channel *ua_chan; | |
509 | ||
421cb601 | 510 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
511 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); |
512 | if (ua_chan == NULL) { | |
513 | PERROR("malloc"); | |
514 | goto error; | |
515 | } | |
516 | ||
517 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
518 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
48842b30 | 519 | ua_chan->handle = -1; |
48842b30 | 520 | ua_chan->ctx = hashtable_new(0); |
5af2f756 | 521 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); |
48842b30 DG |
522 | ua_chan->events = hashtable_new_str(0); |
523 | hashtable_node_init(&ua_chan->node, (void *) ua_chan->name, | |
524 | strlen(ua_chan->name)); | |
525 | ||
526 | DBG3("UST app channel %s allocated", ua_chan->name); | |
527 | ||
528 | return ua_chan; | |
529 | ||
530 | error: | |
531 | return NULL; | |
532 | } | |
533 | ||
421cb601 DG |
534 | /* |
535 | * Alloc new UST app event. | |
536 | */ | |
537 | static struct ust_app_event *alloc_ust_app_event(char *name) | |
48842b30 DG |
538 | { |
539 | struct ust_app_event *ua_event; | |
540 | ||
421cb601 | 541 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
542 | ua_event = zmalloc(sizeof(struct ust_app_event)); |
543 | if (ua_event == NULL) { | |
544 | PERROR("malloc"); | |
545 | goto error; | |
546 | } | |
547 | ||
548 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
549 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
550 | ua_event->ctx = hashtable_new(0); | |
551 | hashtable_node_init(&ua_event->node, (void *) ua_event->name, | |
552 | strlen(ua_event->name)); | |
553 | ||
554 | DBG3("UST app event %s allocated", ua_event->name); | |
555 | ||
556 | return ua_event; | |
557 | ||
558 | error: | |
559 | return NULL; | |
560 | } | |
561 | ||
421cb601 | 562 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
563 | struct ltt_ust_event *uevent) |
564 | { | |
565 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); | |
566 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
567 | ||
568 | /* TODO: support copy context */ | |
569 | } | |
570 | ||
421cb601 | 571 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
572 | struct ltt_ust_channel *uchan) |
573 | { | |
574 | struct cds_lfht_iter iter; | |
575 | struct cds_lfht_node *node, *ua_event_node; | |
576 | struct ltt_ust_event *uevent; | |
577 | struct ust_app_event *ua_event; | |
578 | ||
421cb601 | 579 | DBG2("Shadow copy of UST app channel %s", ua_chan->name); |
48842b30 DG |
580 | |
581 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
582 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
583 | ||
584 | /* TODO: support copy context */ | |
585 | ||
421cb601 | 586 | /* Copy all events from ltt ust channel to ust app channel */ |
48842b30 DG |
587 | hashtable_get_first(uchan->events, &iter); |
588 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
589 | uevent = caa_container_of(node, struct ltt_ust_event, node); | |
590 | ||
591 | ua_event_node = hashtable_lookup(ua_chan->events, | |
592 | (void *) uevent->attr.name, strlen(uevent->attr.name), &iter); | |
593 | if (ua_event_node == NULL) { | |
421cb601 | 594 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 595 | uevent->attr.name); |
421cb601 | 596 | ua_event = alloc_ust_app_event(uevent->attr.name); |
48842b30 | 597 | if (ua_event == NULL) { |
421cb601 | 598 | goto next; |
48842b30 | 599 | } |
421cb601 | 600 | shadow_copy_event(ua_event, uevent); |
48842b30 | 601 | hashtable_add_unique(ua_chan->events, &ua_event->node); |
48842b30 DG |
602 | } |
603 | ||
421cb601 | 604 | next: |
48842b30 DG |
605 | /* Get next UST events */ |
606 | hashtable_get_next(uchan->events, &iter); | |
607 | } | |
608 | ||
421cb601 | 609 | DBG3("Shadow copy channel done"); |
48842b30 DG |
610 | } |
611 | ||
421cb601 | 612 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
48842b30 DG |
613 | struct ltt_ust_session *usess) |
614 | { | |
615 | struct cds_lfht_node *node, *ua_chan_node; | |
616 | struct cds_lfht_iter iter; | |
617 | struct ltt_ust_channel *uchan; | |
618 | struct ust_app_channel *ua_chan; | |
619 | ||
421cb601 | 620 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 DG |
621 | |
622 | ua_sess->uid = usess->uid; | |
623 | ||
624 | /* TODO: support all UST domain */ | |
625 | ||
626 | /* Iterate over all channels in global domain. */ | |
627 | hashtable_get_first(usess->domain_global.channels, &iter); | |
628 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
629 | uchan = caa_container_of(node, struct ltt_ust_channel, node); | |
630 | ||
631 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
421cb601 | 632 | (void *)uchan->name, strlen(uchan->name), &iter); |
48842b30 | 633 | if (ua_chan_node == NULL) { |
421cb601 | 634 | DBG2("Channel %s not found on shadow session copy, creating it", |
48842b30 | 635 | uchan->name); |
421cb601 | 636 | ua_chan = alloc_ust_app_channel(uchan->name); |
48842b30 DG |
637 | if (ua_chan == NULL) { |
638 | /* malloc failed... continuing */ | |
421cb601 | 639 | goto next; |
48842b30 | 640 | } |
421cb601 DG |
641 | |
642 | shadow_copy_channel(ua_chan, uchan); | |
48842b30 | 643 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); |
48842b30 DG |
644 | } |
645 | ||
421cb601 | 646 | next: |
48842b30 DG |
647 | /* Next item in hash table */ |
648 | hashtable_get_next(usess->domain_global.channels, &iter); | |
649 | } | |
650 | } | |
651 | ||
421cb601 DG |
652 | /* |
653 | * Return ust app session from the app session hashtable using the UST session | |
654 | * uid. | |
655 | */ | |
48842b30 DG |
656 | static struct ust_app_session *lookup_session_by_app( |
657 | struct ltt_ust_session *usess, struct ust_app *app) | |
658 | { | |
659 | struct cds_lfht_iter iter; | |
660 | struct cds_lfht_node *node; | |
661 | ||
662 | /* Get right UST app session from app */ | |
663 | node = hashtable_lookup(app->sessions, | |
421cb601 | 664 | (void *) ((unsigned long) usess->uid), sizeof(void *), &iter); |
48842b30 DG |
665 | if (node == NULL) { |
666 | goto error; | |
667 | } | |
668 | ||
669 | return caa_container_of(node, struct ust_app_session, node); | |
670 | ||
671 | error: | |
672 | return NULL; | |
673 | } | |
674 | ||
421cb601 DG |
675 | /* |
676 | * Create a UST session onto the tracer of app and add it the session | |
677 | * hashtable. | |
678 | * | |
679 | * Return ust app session or NULL on error. | |
680 | */ | |
681 | static struct ust_app_session *create_ust_app_session( | |
682 | struct ltt_ust_session *usess, struct ust_app *app) | |
683 | { | |
684 | int ret; | |
685 | struct ust_app_session *ua_sess; | |
686 | ||
687 | ua_sess = lookup_session_by_app(usess, app); | |
688 | if (ua_sess == NULL) { | |
689 | DBG2("UST app pid: %d session uid %d not found, creating it", | |
690 | app->key.pid, usess->uid); | |
691 | ua_sess = alloc_ust_app_session(); | |
692 | if (ua_sess == NULL) { | |
693 | /* Only malloc can failed so something is really wrong */ | |
694 | goto error; | |
695 | } | |
696 | shadow_copy_session(ua_sess, usess); | |
697 | } | |
698 | ||
699 | if (ua_sess->handle == -1) { | |
700 | ret = ustctl_create_session(app->key.sock); | |
701 | if (ret < 0) { | |
702 | ERR("Error creating session for app pid %d, sock %d", | |
703 | app->key.pid, app->key.sock); | |
704 | /* TODO: free() ua_sess */ | |
705 | goto error; | |
706 | } | |
707 | ||
708 | DBG2("UST app ustctl create session handle %d", ret); | |
709 | ua_sess->handle = ret; | |
710 | ||
711 | /* Add ust app session to app's HT */ | |
712 | hashtable_node_init(&ua_sess->node, | |
713 | (void *)((unsigned long) ua_sess->uid), sizeof(void *)); | |
714 | hashtable_add_unique(app->sessions, &ua_sess->node); | |
715 | ||
716 | DBG2("UST app session created successfully with handle %d", ret); | |
717 | } | |
718 | ||
719 | return ua_sess; | |
720 | ||
721 | error: | |
722 | return NULL; | |
723 | } | |
724 | ||
725 | static struct ust_app_channel *create_ust_app_channel( | |
726 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
727 | struct ust_app *app) | |
728 | { | |
729 | int ret = 0; | |
730 | struct cds_lfht_iter iter; | |
731 | struct cds_lfht_node *ua_chan_node; | |
732 | struct ust_app_channel *ua_chan; | |
733 | ||
734 | /* Lookup channel in the ust app session */ | |
735 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
736 | (void *)uchan->name, strlen(uchan->name), &iter); | |
737 | if (ua_chan_node == NULL) { | |
738 | DBG2("Unable to find channel %s in ust session uid %u", | |
739 | uchan->name, ua_sess->uid); | |
740 | ua_chan = alloc_ust_app_channel(uchan->name); | |
741 | if (ua_chan == NULL) { | |
742 | goto error; | |
743 | } | |
744 | shadow_copy_channel(ua_chan, uchan); | |
745 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
746 | } else { | |
747 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
748 | } | |
749 | ||
750 | /* TODO: remove cast and use lttng-ust-abi.h */ | |
751 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
752 | (struct lttng_ust_channel_attr *)&uchan->attr, &ua_chan->obj); | |
753 | if (ret < 0) { | |
754 | DBG("Error creating channel %s for app (pid: %d, sock: %d) " | |
755 | "and session handle %d with ret %d", | |
756 | ua_chan->name, app->key.pid, app->key.sock, | |
757 | ua_sess->handle, ret); | |
758 | goto error; | |
759 | } | |
760 | ||
761 | ua_chan->handle = ua_chan->obj->handle; | |
762 | ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; | |
763 | ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; | |
764 | ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; | |
765 | ||
766 | DBG2("Channel %s UST create successfully for pid:%d and sock:%d", | |
767 | ua_chan->name, app->key.pid, app->key.sock); | |
768 | ||
769 | return ua_chan; | |
770 | ||
771 | error: | |
772 | return NULL; | |
773 | } | |
774 | ||
775 | static struct ust_app_event *create_ust_app_event( | |
776 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan, | |
777 | struct ltt_ust_event *uevent, struct ust_app *app) | |
778 | { | |
779 | int ret; | |
780 | struct cds_lfht_iter iter; | |
781 | struct cds_lfht_node *ua_event_node; | |
782 | struct ust_app_event *ua_event; | |
783 | ||
784 | /* Get event node */ | |
785 | ua_event_node = hashtable_lookup(ua_chan->events, | |
786 | (void *)uevent->attr.name, strlen(uevent->attr.name), &iter); | |
787 | if (ua_event_node == NULL) { | |
788 | DBG2("UST app event %s not found, creating it", uevent->attr.name); | |
789 | /* Does not exist so create one */ | |
790 | ua_event = alloc_ust_app_event(uevent->attr.name); | |
791 | if (ua_event == NULL) { | |
792 | /* Only malloc can failed so something is really wrong */ | |
793 | goto error; | |
794 | } | |
795 | shadow_copy_event(ua_event, uevent); | |
796 | ||
797 | hashtable_add_unique(ua_chan->events, &ua_event->node); | |
798 | } else { | |
799 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
800 | } | |
801 | ||
802 | /* Create UST event on tracer */ | |
803 | ret = ustctl_create_event(app->key.sock, &uevent->attr, ua_chan->obj, | |
804 | &ua_event->obj); | |
805 | if (ret < 0) { | |
806 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
807 | uevent->attr.name, app->key.pid, ret); | |
808 | /* TODO: free() ua_event */ | |
809 | goto error; | |
810 | } | |
811 | ua_event->handle = ua_event->obj->handle; | |
812 | ua_event->enabled = 1; | |
813 | ||
814 | ||
815 | DBG2("Event %s UST create successfully for pid:%d", uevent->attr.name, | |
816 | app->key.pid); | |
817 | ||
818 | return ua_event; | |
819 | ||
820 | error: | |
821 | return NULL; | |
822 | } | |
823 | ||
824 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
825 | char *pathname, struct ust_app *app) | |
826 | { | |
827 | int ret = 0; | |
828 | struct lttng_ust_channel_attr uattr; | |
829 | ||
830 | if (ua_sess->metadata == NULL) { | |
831 | /* Allocate UST metadata */ | |
832 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
833 | if (ua_sess->metadata == NULL) { | |
834 | ERR("UST app session %d creating metadata failed", | |
835 | ua_sess->handle); | |
836 | goto error; | |
837 | } | |
838 | ||
839 | uattr.overwrite = ua_sess->metadata->attr.overwrite; | |
840 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
841 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
842 | uattr.switch_timer_interval = | |
843 | ua_sess->metadata->attr.switch_timer_interval; | |
844 | uattr.read_timer_interval = | |
845 | ua_sess->metadata->attr.read_timer_interval; | |
846 | uattr.output = ua_sess->metadata->attr.output; | |
847 | ||
848 | /* UST tracer metadata creation */ | |
849 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
850 | &ua_sess->metadata->obj); | |
851 | if (ret < 0) { | |
852 | ERR("UST app open metadata failed for app pid:%d", | |
853 | app->key.pid); | |
854 | goto error; | |
855 | } | |
856 | ||
857 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
858 | } | |
859 | ||
860 | /* Open UST metadata stream */ | |
861 | if (ua_sess->metadata->stream_obj == NULL) { | |
862 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, | |
863 | &ua_sess->metadata->stream_obj); | |
864 | if (ret < 0) { | |
865 | ERR("UST create metadata stream failed"); | |
866 | goto error; | |
867 | } | |
868 | ||
869 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, "%s/%s-%d", | |
870 | pathname, app->name, app->key.pid); | |
871 | if (ret < 0) { | |
872 | PERROR("asprintf UST create stream"); | |
873 | goto error; | |
874 | } | |
875 | ||
876 | ret = mkdir(ua_sess->metadata->pathname, S_IRWXU | S_IRWXG); | |
877 | if (ret < 0) { | |
878 | PERROR("mkdir UST metadata"); | |
879 | goto error; | |
880 | } | |
881 | ||
882 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, "%s/%s-%d/metadata", | |
883 | pathname, app->name, app->key.pid); | |
884 | if (ret < 0) { | |
885 | PERROR("asprintf UST create stream"); | |
886 | goto error; | |
887 | } | |
888 | ||
889 | DBG2("UST metadata stream object created for app pid %d", | |
890 | app->key.pid); | |
891 | } | |
892 | ||
893 | return 0; | |
894 | ||
895 | error: | |
896 | return -1; | |
897 | } | |
898 | ||
899 | /* | |
900 | * Add channel to all ust app session. | |
901 | */ | |
902 | int ust_app_add_channel_all(struct ltt_ust_session *usess, | |
48842b30 DG |
903 | struct ltt_ust_channel *uchan) |
904 | { | |
905 | int ret = 0; | |
906 | struct cds_lfht_iter iter; | |
421cb601 | 907 | struct cds_lfht_node *node; |
48842b30 DG |
908 | struct ust_app *app; |
909 | struct ust_app_session *ua_sess; | |
910 | struct ust_app_channel *ua_chan; | |
911 | ||
421cb601 DG |
912 | if (usess == NULL || uchan == NULL) { |
913 | ERR("Adding UST global channel to NULL values"); | |
914 | ret = -1; | |
915 | goto error; | |
916 | } | |
917 | ||
48842b30 DG |
918 | DBG2("UST app adding channel %s to global domain for session uid %d", |
919 | uchan->name, usess->uid); | |
920 | ||
921 | rcu_read_lock(); | |
421cb601 DG |
922 | |
923 | /* For every UST applications registered */ | |
48842b30 DG |
924 | hashtable_get_first(ust_app_ht, &iter); |
925 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
926 | app = caa_container_of(node, struct ust_app, node); | |
927 | ||
421cb601 DG |
928 | /* Create session on the tracer side and add it to app session HT */ |
929 | ua_sess = create_ust_app_session(usess, app); | |
509cbaf8 | 930 | if (ua_sess == NULL) { |
48842b30 DG |
931 | goto next; |
932 | } | |
933 | ||
421cb601 DG |
934 | /* Create channel onto application */ |
935 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
936 | if (ua_chan == NULL) { | |
48842b30 DG |
937 | goto next; |
938 | } | |
939 | ||
48842b30 DG |
940 | next: |
941 | /* Next applications */ | |
942 | hashtable_get_next(ust_app_ht, &iter); | |
943 | } | |
944 | rcu_read_unlock(); | |
945 | ||
421cb601 | 946 | error: |
48842b30 DG |
947 | return ret; |
948 | } | |
949 | ||
421cb601 | 950 | int ust_app_add_event_all(struct ltt_ust_session *usess, |
48842b30 DG |
951 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
952 | { | |
953 | int ret = 0; | |
954 | struct cds_lfht_iter iter; | |
421cb601 | 955 | struct cds_lfht_node *node, *ua_chan_node; |
48842b30 DG |
956 | struct ust_app *app; |
957 | struct ust_app_session *ua_sess; | |
958 | struct ust_app_channel *ua_chan; | |
959 | struct ust_app_event *ua_event; | |
48842b30 DG |
960 | |
961 | DBG2("UST app adding event %s to global domain for session uid %d", | |
962 | uevent->attr.name, usess->uid); | |
963 | ||
964 | rcu_read_lock(); | |
421cb601 DG |
965 | |
966 | /* For all registered applications */ | |
48842b30 DG |
967 | hashtable_get_first(ust_app_ht, &iter); |
968 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
969 | app = caa_container_of(node, struct ust_app, node); | |
970 | ||
421cb601 DG |
971 | /* Create session on the tracer side and add it to app session HT */ |
972 | ua_sess = create_ust_app_session(usess, app); | |
509cbaf8 | 973 | if (ua_sess == NULL) { |
421cb601 | 974 | goto next; |
48842b30 DG |
975 | } |
976 | ||
977 | /* Lookup channel in the ust app session */ | |
978 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
421cb601 | 979 | (void *)uchan->name, strlen(uchan->name), &iter); |
48842b30 | 980 | if (ua_chan_node == NULL) { |
421cb601 DG |
981 | ERR("Channel %s not found in session uid %d. Skipping", |
982 | uchan->name, usess->uid); | |
48842b30 DG |
983 | goto next; |
984 | } | |
48842b30 DG |
985 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
986 | ||
421cb601 DG |
987 | ua_event = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
988 | if (ua_event == NULL) { | |
989 | goto next; | |
48842b30 DG |
990 | } |
991 | ||
48842b30 DG |
992 | next: |
993 | /* Next applications */ | |
994 | hashtable_get_next(ust_app_ht, &iter); | |
995 | } | |
996 | rcu_read_unlock(); | |
997 | ||
998 | return ret; | |
999 | } | |
1000 | ||
421cb601 | 1001 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1002 | { |
1003 | int ret = 0; | |
1004 | struct cds_lfht_iter iter; | |
421cb601 | 1005 | struct cds_lfht_node *node; |
48842b30 DG |
1006 | struct ust_app_session *ua_sess; |
1007 | struct ust_app_channel *ua_chan; | |
48842b30 | 1008 | |
421cb601 | 1009 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 1010 | |
509cbaf8 MD |
1011 | rcu_read_lock(); |
1012 | ||
421cb601 DG |
1013 | ua_sess = lookup_session_by_app(usess, app); |
1014 | if (ua_sess == NULL) { | |
1015 | /* Only malloc can failed so something is really wrong */ | |
509cbaf8 | 1016 | goto error_rcu_unlock; |
421cb601 | 1017 | } |
48842b30 | 1018 | |
421cb601 DG |
1019 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1020 | if (ret < 0) { | |
509cbaf8 | 1021 | goto error_rcu_unlock; |
421cb601 | 1022 | } |
48842b30 | 1023 | |
421cb601 DG |
1024 | /* For each channel */ |
1025 | hashtable_get_first(ua_sess->channels, &iter); | |
1026 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
1027 | ua_chan = caa_container_of(node, struct ust_app_channel, node); | |
48842b30 | 1028 | |
421cb601 DG |
1029 | /* Create all streams */ |
1030 | while (1) { | |
1031 | struct ltt_ust_stream *ustream; | |
48842b30 | 1032 | |
421cb601 DG |
1033 | ustream = zmalloc(sizeof(*ustream)); |
1034 | if (ustream == NULL) { | |
1035 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1036 | goto error_rcu_unlock; |
421cb601 | 1037 | } |
48842b30 | 1038 | |
421cb601 DG |
1039 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
1040 | &ustream->obj); | |
48842b30 | 1041 | if (ret < 0) { |
421cb601 DG |
1042 | /* Got all streams */ |
1043 | break; | |
48842b30 | 1044 | } |
421cb601 | 1045 | ustream->handle = ustream->obj->handle; |
48842b30 | 1046 | |
421cb601 DG |
1047 | /* Order is important */ |
1048 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
1049 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s-%d/%s_%u", | |
1050 | usess->pathname, app->name, app->key.pid, | |
1051 | ua_chan->name, ua_chan->streams.count++); | |
aba8e916 DG |
1052 | if (ret < 0) { |
1053 | PERROR("asprintf UST create stream"); | |
421cb601 | 1054 | continue; |
aba8e916 | 1055 | } |
421cb601 DG |
1056 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1057 | ustream->pathname); | |
1058 | } | |
aba8e916 | 1059 | |
421cb601 DG |
1060 | /* Next applications */ |
1061 | hashtable_get_next(ua_sess->channels, &iter); | |
1062 | } | |
aba8e916 | 1063 | |
421cb601 DG |
1064 | /* Setup UST consumer socket and send fds to it */ |
1065 | ret = ust_consumer_send_session(usess->consumer_fd, ua_sess); | |
1066 | if (ret < 0) { | |
509cbaf8 | 1067 | goto error_rcu_unlock; |
421cb601 | 1068 | } |
48842b30 | 1069 | |
421cb601 DG |
1070 | /* This start the UST tracing */ |
1071 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
1072 | if (ret < 0) { | |
1073 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 1074 | goto error_rcu_unlock; |
421cb601 | 1075 | } |
509cbaf8 | 1076 | rcu_read_unlock(); |
48842b30 | 1077 | |
421cb601 DG |
1078 | /* Quiescent wait after starting trace */ |
1079 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 1080 | |
421cb601 | 1081 | return 0; |
48842b30 | 1082 | |
509cbaf8 MD |
1083 | error_rcu_unlock: |
1084 | rcu_read_unlock(); | |
421cb601 DG |
1085 | return -1; |
1086 | } | |
48842b30 | 1087 | |
421cb601 DG |
1088 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
1089 | { | |
1090 | int ret = 0; | |
1091 | struct cds_lfht_iter iter; | |
1092 | struct cds_lfht_node *node; | |
1093 | struct ust_app *app; | |
48842b30 | 1094 | |
421cb601 DG |
1095 | DBG("Starting all UST traces"); |
1096 | ||
1097 | rcu_read_lock(); | |
1098 | hashtable_get_first(ust_app_ht, &iter); | |
1099 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
1100 | app = caa_container_of(node, struct ust_app, node); | |
1101 | ||
1102 | ret = ust_app_start_trace(usess, app); | |
48842b30 | 1103 | if (ret < 0) { |
48842b30 DG |
1104 | goto next; |
1105 | } | |
1106 | ||
48842b30 DG |
1107 | next: |
1108 | /* Next applications */ | |
1109 | hashtable_get_next(ust_app_ht, &iter); | |
1110 | } | |
1111 | rcu_read_unlock(); | |
1112 | ||
1113 | return 0; | |
1114 | } | |
487cf67c DG |
1115 | |
1116 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) | |
1117 | { | |
1118 | int ret = 0; | |
487cf67c | 1119 | struct cds_lfht_iter iter; |
421cb601 | 1120 | struct cds_lfht_node *node; |
487cf67c DG |
1121 | struct ust_app *app; |
1122 | struct ust_app_session *ua_sess; | |
1123 | struct ust_app_channel *ua_chan; | |
1124 | struct ust_app_event *ua_event; | |
487cf67c | 1125 | struct ltt_ust_channel *uchan; |
421cb601 | 1126 | struct ltt_ust_event *uevent; |
487cf67c | 1127 | |
1f3580c7 DG |
1128 | rcu_read_lock(); |
1129 | ||
1130 | if (usess == NULL) { | |
1131 | DBG2("No UST session on global update. Returning"); | |
1132 | goto error; | |
1133 | } | |
1134 | ||
487cf67c DG |
1135 | DBG2("UST app global update for app sock %d for session uid %d", sock, |
1136 | usess->uid); | |
1137 | ||
487cf67c DG |
1138 | app = find_app_by_sock(sock); |
1139 | if (app == NULL) { | |
1140 | ERR("Failed to update app sock %d", sock); | |
1141 | goto error; | |
1142 | } | |
1143 | ||
421cb601 | 1144 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 1145 | if (ua_sess == NULL) { |
487cf67c DG |
1146 | goto error; |
1147 | } | |
1148 | ||
487cf67c DG |
1149 | hashtable_get_first(usess->domain_global.channels, &iter); |
1150 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
1151 | uchan = caa_container_of(node, struct ltt_ust_channel, node); | |
1152 | ||
421cb601 DG |
1153 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); |
1154 | if (ua_chan == NULL) { | |
487cf67c DG |
1155 | goto next_chan; |
1156 | } | |
1157 | ||
421cb601 | 1158 | hashtable_get_first(uchan->events, &iter); |
487cf67c | 1159 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { |
421cb601 | 1160 | uevent = caa_container_of(node, struct ltt_ust_event, node); |
487cf67c | 1161 | |
421cb601 DG |
1162 | ua_event = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1163 | if (ua_event == NULL) { | |
487cf67c DG |
1164 | goto next_event; |
1165 | } | |
1166 | ||
487cf67c | 1167 | next_event: |
421cb601 | 1168 | hashtable_get_next(uchan->events, &iter); |
36dc12cc DG |
1169 | } |
1170 | ||
487cf67c | 1171 | next_chan: |
421cb601 DG |
1172 | /* Next item in hash table */ |
1173 | hashtable_get_next(usess->domain_global.channels, &iter); | |
487cf67c DG |
1174 | } |
1175 | ||
36dc12cc | 1176 | if (usess->start_trace) { |
421cb601 | 1177 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 1178 | if (ret < 0) { |
36dc12cc DG |
1179 | goto error; |
1180 | } | |
1181 | ||
36dc12cc DG |
1182 | DBG2("UST trace started for app pid %d", app->key.pid); |
1183 | } | |
1184 | ||
487cf67c DG |
1185 | error: |
1186 | rcu_read_unlock(); | |
1187 | return; | |
1188 | } |