Commit | Line | Data |
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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 | /* | |
284d8f55 DG |
137 | * Delete a traceable application structure from the global list. Never call |
138 | * this function outside of a call_rcu call. | |
91d76f53 | 139 | */ |
284d8f55 | 140 | static void delete_ust_app(struct ust_app *app) |
91d76f53 | 141 | { |
f6a9efaa DG |
142 | int ret; |
143 | struct cds_lfht_node *node; | |
144 | struct cds_lfht_iter iter; | |
284d8f55 | 145 | struct ust_app_session *ua_sess; |
44d3bd01 | 146 | |
f6a9efaa | 147 | rcu_read_lock(); |
44d3bd01 | 148 | |
f6a9efaa DG |
149 | /* Remove from key hash table */ |
150 | node = hashtable_lookup(ust_app_sock_key_map, | |
284d8f55 | 151 | (void *) ((unsigned long) app->key.sock), sizeof(void *), &iter); |
f6a9efaa | 152 | if (node == NULL) { |
284d8f55 DG |
153 | /* Not suppose to happen */ |
154 | ERR("UST app key %d not found in key hash table", app->key.sock); | |
d80a6244 | 155 | goto end; |
284d8f55 DG |
156 | } |
157 | ||
158 | ret = hashtable_del(ust_app_sock_key_map, &iter); | |
159 | if (ret) { | |
160 | ERR("UST app unable to delete app sock %d from key hash table", | |
161 | app->key.sock); | |
f6a9efaa | 162 | } else { |
284d8f55 DG |
163 | DBG2("UST app pair sock %d key %d deleted", |
164 | app->key.sock, app->key.pid); | |
f6a9efaa DG |
165 | } |
166 | ||
d80a6244 DG |
167 | /* Socket is already closed at this point */ |
168 | ||
169 | /* Delete ust app sessions info */ | |
284d8f55 DG |
170 | if (app->sock_closed) { |
171 | app->key.sock = -1; | |
d80a6244 DG |
172 | } |
173 | ||
284d8f55 DG |
174 | cds_lfht_for_each_entry(app->sessions, &iter, ua_sess, node) { |
175 | hashtable_del(app->sessions, &iter); | |
176 | delete_ust_app_session(app->key.sock, ua_sess); | |
d80a6244 | 177 | } |
f6a9efaa | 178 | |
284d8f55 | 179 | ret = hashtable_destroy(app->sessions); |
d80a6244 DG |
180 | if (ret < 0) { |
181 | ERR("UST app destroy session hashtable failed"); | |
182 | goto end; | |
183 | } | |
184 | ||
284d8f55 DG |
185 | if (!app->sock_closed) { |
186 | close(app->key.sock); | |
d80a6244 DG |
187 | } |
188 | ||
284d8f55 DG |
189 | DBG2("UST app pid %d deleted", app->key.pid); |
190 | free(app); | |
d80a6244 | 191 | end: |
f6a9efaa | 192 | rcu_read_unlock(); |
099e26bd DG |
193 | } |
194 | ||
195 | /* | |
f6a9efaa | 196 | * URCU intermediate call to delete an UST app. |
099e26bd | 197 | */ |
f6a9efaa | 198 | static void delete_ust_app_rcu(struct rcu_head *head) |
099e26bd | 199 | { |
f6a9efaa DG |
200 | struct cds_lfht_node *node = |
201 | caa_container_of(head, struct cds_lfht_node, head); | |
202 | struct ust_app *app = | |
203 | caa_container_of(node, struct ust_app, node); | |
204 | ||
205 | delete_ust_app(app); | |
099e26bd DG |
206 | } |
207 | ||
208 | /* | |
421cb601 DG |
209 | * Find an ust_app using the sock and return it. RCU read side lock must be |
210 | * held before calling this helper function. | |
099e26bd | 211 | */ |
f6a9efaa | 212 | static struct ust_app *find_app_by_sock(int sock) |
099e26bd | 213 | { |
f6a9efaa DG |
214 | struct cds_lfht_node *node; |
215 | struct ust_app_key *key; | |
216 | struct cds_lfht_iter iter; | |
f6a9efaa | 217 | |
f6a9efaa DG |
218 | node = hashtable_lookup(ust_app_sock_key_map, |
219 | (void *)((unsigned long) sock), sizeof(void *), &iter); | |
220 | if (node == NULL) { | |
221 | DBG2("UST app find by sock %d key not found", sock); | |
f6a9efaa DG |
222 | goto error; |
223 | } | |
224 | ||
225 | key = caa_container_of(node, struct ust_app_key, node); | |
226 | ||
227 | node = hashtable_lookup(ust_app_ht, | |
228 | (void *)((unsigned long) key->pid), sizeof(void *), &iter); | |
229 | if (node == NULL) { | |
230 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
231 | goto error; |
232 | } | |
f6a9efaa DG |
233 | return caa_container_of(node, struct ust_app, node); |
234 | ||
235 | error: | |
236 | return NULL; | |
099e26bd DG |
237 | } |
238 | ||
239 | /* | |
f6a9efaa | 240 | * Return pointer to traceable apps list. |
099e26bd | 241 | */ |
f6a9efaa | 242 | struct cds_lfht *ust_app_get_ht(void) |
099e26bd | 243 | { |
f6a9efaa | 244 | return ust_app_ht; |
91d76f53 DG |
245 | } |
246 | ||
0177d773 | 247 | /* |
f6a9efaa | 248 | * Return ust app pointer or NULL if not found. |
0177d773 | 249 | */ |
f6a9efaa | 250 | struct ust_app *ust_app_find_by_pid(pid_t pid) |
0177d773 | 251 | { |
f6a9efaa DG |
252 | struct cds_lfht_node *node; |
253 | struct cds_lfht_iter iter; | |
0177d773 | 254 | |
f6a9efaa DG |
255 | rcu_read_lock(); |
256 | node = hashtable_lookup(ust_app_ht, | |
257 | (void *)((unsigned long) pid), sizeof(void *), &iter); | |
258 | if (node == NULL) { | |
f6a9efaa DG |
259 | DBG2("UST app no found with pid %d", pid); |
260 | goto error; | |
0177d773 | 261 | } |
f6a9efaa | 262 | rcu_read_unlock(); |
0177d773 | 263 | |
f6a9efaa | 264 | DBG2("Found UST app by pid %d", pid); |
44d3bd01 | 265 | |
f6a9efaa DG |
266 | return caa_container_of(node, struct ust_app, node); |
267 | ||
268 | error: | |
ee2fd646 | 269 | rcu_read_unlock(); |
0177d773 DG |
270 | return NULL; |
271 | } | |
272 | ||
91d76f53 | 273 | /* |
56fff090 | 274 | * Using pid and uid (of the app), allocate a new ust_app struct and |
050349bb | 275 | * add it to the global traceable app list. |
91d76f53 | 276 | * |
050349bb | 277 | * On success, return 0, else return malloc ENOMEM. |
91d76f53 | 278 | */ |
56fff090 | 279 | int ust_app_register(struct ust_register_msg *msg, int sock) |
91d76f53 | 280 | { |
56fff090 | 281 | struct ust_app *lta; |
91d76f53 | 282 | |
d80a6244 | 283 | lta = zmalloc(sizeof(struct ust_app)); |
91d76f53 | 284 | if (lta == NULL) { |
48842b30 | 285 | PERROR("malloc"); |
91d76f53 DG |
286 | return -ENOMEM; |
287 | } | |
288 | ||
284d8f55 | 289 | lta->ppid = msg->ppid; |
099e26bd DG |
290 | lta->uid = msg->uid; |
291 | lta->gid = msg->gid; | |
099e26bd DG |
292 | lta->v_major = msg->major; |
293 | lta->v_minor = msg->minor; | |
099e26bd DG |
294 | strncpy(lta->name, msg->name, sizeof(lta->name)); |
295 | lta->name[16] = '\0'; | |
48842b30 | 296 | lta->sessions = hashtable_new(0); |
f6a9efaa | 297 | |
284d8f55 DG |
298 | /* Set key map */ |
299 | lta->key.pid = msg->pid; | |
300 | hashtable_node_init(<a->node, (void *)((unsigned long)lta->key.pid), | |
301 | sizeof(void *)); | |
302 | lta->key.sock = sock; | |
f6a9efaa DG |
303 | hashtable_node_init(<a->key.node, (void *)((unsigned long)lta->key.sock), |
304 | sizeof(void *)); | |
099e26bd | 305 | |
f6a9efaa | 306 | rcu_read_lock(); |
f6a9efaa | 307 | hashtable_add_unique(ust_app_sock_key_map, <a->key.node); |
284d8f55 | 308 | hashtable_add_unique(ust_app_ht, <a->node); |
f6a9efaa | 309 | rcu_read_unlock(); |
099e26bd DG |
310 | |
311 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
f6a9efaa DG |
312 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, |
313 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
91d76f53 DG |
314 | |
315 | return 0; | |
316 | } | |
317 | ||
318 | /* | |
050349bb DG |
319 | * Unregister app by removing it from the global traceable app list and freeing |
320 | * the data struct. | |
099e26bd DG |
321 | * |
322 | * The socket is already closed at this point so no close to sock. | |
91d76f53 | 323 | */ |
56fff090 | 324 | void ust_app_unregister(int sock) |
91d76f53 | 325 | { |
56fff090 | 326 | struct ust_app *lta; |
421cb601 DG |
327 | struct cds_lfht_node *node; |
328 | struct cds_lfht_iter iter; | |
91d76f53 | 329 | |
421cb601 | 330 | rcu_read_lock(); |
099e26bd | 331 | lta = find_app_by_sock(sock); |
421cb601 DG |
332 | if (lta == NULL) { |
333 | ERR("Unregister app sock %d not found!", sock); | |
334 | goto error; | |
335 | } | |
336 | ||
337 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
338 | ||
339 | /* Get the node reference for a call_rcu */ | |
340 | node = hashtable_lookup(ust_app_ht, | |
341 | (void *)((unsigned long) lta->key.pid), sizeof(void *), &iter); | |
342 | if (node == NULL) { | |
343 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
344 | goto error; | |
91d76f53 | 345 | } |
421cb601 | 346 | |
d80a6244 DG |
347 | /* We got called because the socket was closed on the remote end. */ |
348 | close(sock); | |
349 | /* Using a flag because we still need "sock" as a key. */ | |
350 | lta->sock_closed = 1; | |
284d8f55 | 351 | hashtable_del(ust_app_ht, &iter); |
421cb601 | 352 | call_rcu(&node->head, delete_ust_app_rcu); |
421cb601 DG |
353 | error: |
354 | rcu_read_unlock(); | |
355 | return; | |
91d76f53 DG |
356 | } |
357 | ||
358 | /* | |
050349bb | 359 | * Return traceable_app_count |
91d76f53 | 360 | */ |
f6a9efaa | 361 | unsigned long ust_app_list_count(void) |
91d76f53 | 362 | { |
f6a9efaa | 363 | unsigned long count; |
91d76f53 | 364 | |
f6a9efaa DG |
365 | rcu_read_lock(); |
366 | count = hashtable_get_count(ust_app_ht); | |
367 | rcu_read_unlock(); | |
91d76f53 | 368 | |
099e26bd | 369 | return count; |
91d76f53 DG |
370 | } |
371 | ||
b551a063 DG |
372 | /* |
373 | * Fill events array with all events name of all registered apps. | |
374 | */ | |
375 | int ust_app_list_events(struct lttng_event **events) | |
376 | { | |
377 | int ret, handle; | |
378 | size_t nbmem, count = 0; | |
379 | struct cds_lfht_iter iter; | |
380 | struct ust_app *app; | |
381 | struct lttng_event *tmp; | |
382 | ||
383 | nbmem = UST_APP_EVENT_LIST_SIZE; | |
384 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
385 | if (tmp == NULL) { | |
386 | PERROR("zmalloc ust app events"); | |
387 | ret = -ENOMEM; | |
388 | goto error; | |
389 | } | |
390 | ||
391 | rcu_read_lock(); | |
392 | ||
393 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
394 | handle = ustctl_tracepoint_list(app->key.sock); | |
395 | if (handle < 0) { | |
396 | ERR("UST app list events getting handle failed for app pid %d", | |
397 | app->key.pid); | |
398 | continue; | |
399 | } | |
400 | ||
401 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, | |
402 | tmp[count].name)) != -ENOENT) { | |
403 | if (count > nbmem) { | |
404 | DBG2("Reallocating event list from %zu to %zu bytes", nbmem, | |
405 | nbmem + UST_APP_EVENT_LIST_SIZE); | |
406 | nbmem += UST_APP_EVENT_LIST_SIZE; | |
407 | tmp = realloc(tmp, nbmem); | |
408 | if (tmp == NULL) { | |
409 | PERROR("realloc ust app events"); | |
410 | ret = -ENOMEM; | |
411 | goto rcu_error; | |
412 | } | |
413 | } | |
414 | ||
415 | tmp[count].type = LTTNG_UST_TRACEPOINT; | |
416 | tmp[count].pid = app->key.pid; | |
37357452 | 417 | tmp[count].enabled = -1; |
b551a063 DG |
418 | count++; |
419 | } | |
420 | } | |
421 | ||
422 | ret = count; | |
423 | *events = tmp; | |
424 | ||
425 | DBG2("UST app list events done (%zu events)", count); | |
426 | ||
427 | rcu_error: | |
428 | rcu_read_unlock(); | |
429 | error: | |
430 | return ret; | |
431 | } | |
432 | ||
91d76f53 | 433 | /* |
099e26bd | 434 | * Free and clean all traceable apps of the global list. |
91d76f53 | 435 | */ |
56fff090 | 436 | void ust_app_clean_list(void) |
91d76f53 | 437 | { |
f6a9efaa DG |
438 | int ret; |
439 | struct cds_lfht_node *node; | |
440 | struct cds_lfht_iter iter; | |
284d8f55 | 441 | struct ust_app *app; |
f6a9efaa | 442 | |
284d8f55 | 443 | DBG2("UST app cleaning registered apps hash table"); |
f6a9efaa DG |
444 | |
445 | rcu_read_lock(); | |
446 | ||
284d8f55 DG |
447 | cds_lfht_for_each(ust_app_ht, &iter, node) { |
448 | app = caa_container_of(node, struct ust_app, node); | |
449 | close(app->key.sock); | |
450 | app->sock_closed = 1; | |
451 | ||
f6a9efaa DG |
452 | ret = hashtable_del(ust_app_ht, &iter); |
453 | if (!ret) { | |
454 | call_rcu(&node->head, delete_ust_app_rcu); | |
455 | } | |
91d76f53 | 456 | } |
f6a9efaa | 457 | |
284d8f55 DG |
458 | hashtable_destroy(ust_app_ht); |
459 | hashtable_destroy(ust_app_sock_key_map); | |
460 | ||
f6a9efaa DG |
461 | rcu_read_unlock(); |
462 | } | |
463 | ||
464 | /* | |
465 | * Init UST app hash table. | |
466 | */ | |
467 | void ust_app_ht_alloc(void) | |
468 | { | |
469 | ust_app_ht = hashtable_new(0); | |
470 | ust_app_sock_key_map = hashtable_new(0); | |
91d76f53 | 471 | } |
48842b30 DG |
472 | |
473 | /* | |
474 | * Alloc new UST app session. | |
475 | */ | |
421cb601 | 476 | static struct ust_app_session *alloc_ust_app_session(void) |
48842b30 DG |
477 | { |
478 | struct ust_app_session *ua_sess; | |
479 | ||
421cb601 | 480 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
481 | ua_sess = zmalloc(sizeof(struct ust_app_session)); |
482 | if (ua_sess == NULL) { | |
483 | PERROR("malloc"); | |
484 | goto error; | |
485 | } | |
486 | ||
48842b30 DG |
487 | ua_sess->handle = -1; |
488 | ua_sess->channels = hashtable_new_str(0); | |
48842b30 DG |
489 | |
490 | return ua_sess; | |
491 | ||
492 | error: | |
493 | return NULL; | |
494 | } | |
495 | ||
421cb601 DG |
496 | /* |
497 | * Alloc new UST app channel. | |
498 | */ | |
284d8f55 DG |
499 | static struct ust_app_channel *alloc_ust_app_channel(char *name, |
500 | struct lttng_ust_channel *attr) | |
48842b30 DG |
501 | { |
502 | struct ust_app_channel *ua_chan; | |
503 | ||
421cb601 | 504 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
505 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); |
506 | if (ua_chan == NULL) { | |
507 | PERROR("malloc"); | |
508 | goto error; | |
509 | } | |
510 | ||
284d8f55 | 511 | /* Setup channel name */ |
48842b30 DG |
512 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); |
513 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
284d8f55 | 514 | |
48842b30 | 515 | ua_chan->handle = -1; |
48842b30 | 516 | ua_chan->ctx = hashtable_new(0); |
48842b30 DG |
517 | ua_chan->events = hashtable_new_str(0); |
518 | hashtable_node_init(&ua_chan->node, (void *) ua_chan->name, | |
519 | strlen(ua_chan->name)); | |
520 | ||
284d8f55 DG |
521 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); |
522 | ||
523 | /* Copy attributes */ | |
524 | if (attr) { | |
525 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
526 | } | |
527 | ||
48842b30 DG |
528 | DBG3("UST app channel %s allocated", ua_chan->name); |
529 | ||
530 | return ua_chan; | |
531 | ||
532 | error: | |
533 | return NULL; | |
534 | } | |
535 | ||
421cb601 DG |
536 | /* |
537 | * Alloc new UST app event. | |
538 | */ | |
284d8f55 DG |
539 | static struct ust_app_event *alloc_ust_app_event(char *name, |
540 | struct lttng_ust_event *attr) | |
48842b30 DG |
541 | { |
542 | struct ust_app_event *ua_event; | |
543 | ||
421cb601 | 544 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
545 | ua_event = zmalloc(sizeof(struct ust_app_event)); |
546 | if (ua_event == NULL) { | |
547 | PERROR("malloc"); | |
548 | goto error; | |
549 | } | |
550 | ||
551 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
552 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
553 | ua_event->ctx = hashtable_new(0); | |
554 | hashtable_node_init(&ua_event->node, (void *) ua_event->name, | |
555 | strlen(ua_event->name)); | |
556 | ||
284d8f55 DG |
557 | /* Copy attributes */ |
558 | if (attr) { | |
559 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
560 | } | |
561 | ||
48842b30 DG |
562 | DBG3("UST app event %s allocated", ua_event->name); |
563 | ||
564 | return ua_event; | |
565 | ||
566 | error: | |
567 | return NULL; | |
568 | } | |
569 | ||
421cb601 | 570 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
571 | struct ltt_ust_event *uevent) |
572 | { | |
573 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); | |
574 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
575 | ||
576 | /* TODO: support copy context */ | |
577 | } | |
578 | ||
421cb601 | 579 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
580 | struct ltt_ust_channel *uchan) |
581 | { | |
582 | struct cds_lfht_iter iter; | |
583 | struct cds_lfht_node *node, *ua_event_node; | |
584 | struct ltt_ust_event *uevent; | |
585 | struct ust_app_event *ua_event; | |
586 | ||
421cb601 | 587 | DBG2("Shadow copy of UST app channel %s", ua_chan->name); |
48842b30 DG |
588 | |
589 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
590 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
591 | ||
592 | /* TODO: support copy context */ | |
593 | ||
421cb601 | 594 | /* Copy all events from ltt ust channel to ust app channel */ |
48842b30 DG |
595 | hashtable_get_first(uchan->events, &iter); |
596 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
597 | uevent = caa_container_of(node, struct ltt_ust_event, node); | |
598 | ||
599 | ua_event_node = hashtable_lookup(ua_chan->events, | |
600 | (void *) uevent->attr.name, strlen(uevent->attr.name), &iter); | |
601 | if (ua_event_node == NULL) { | |
421cb601 | 602 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 603 | uevent->attr.name); |
284d8f55 | 604 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 605 | if (ua_event == NULL) { |
421cb601 | 606 | goto next; |
48842b30 | 607 | } |
421cb601 | 608 | shadow_copy_event(ua_event, uevent); |
48842b30 | 609 | hashtable_add_unique(ua_chan->events, &ua_event->node); |
48842b30 DG |
610 | } |
611 | ||
421cb601 | 612 | next: |
48842b30 DG |
613 | /* Get next UST events */ |
614 | hashtable_get_next(uchan->events, &iter); | |
615 | } | |
616 | ||
421cb601 | 617 | DBG3("Shadow copy channel done"); |
48842b30 DG |
618 | } |
619 | ||
421cb601 | 620 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
48842b30 DG |
621 | struct ltt_ust_session *usess) |
622 | { | |
623 | struct cds_lfht_node *node, *ua_chan_node; | |
624 | struct cds_lfht_iter iter; | |
625 | struct ltt_ust_channel *uchan; | |
626 | struct ust_app_channel *ua_chan; | |
627 | ||
421cb601 | 628 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 DG |
629 | |
630 | ua_sess->uid = usess->uid; | |
631 | ||
632 | /* TODO: support all UST domain */ | |
633 | ||
634 | /* Iterate over all channels in global domain. */ | |
635 | hashtable_get_first(usess->domain_global.channels, &iter); | |
636 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
637 | uchan = caa_container_of(node, struct ltt_ust_channel, node); | |
638 | ||
639 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
421cb601 | 640 | (void *)uchan->name, strlen(uchan->name), &iter); |
48842b30 | 641 | if (ua_chan_node == NULL) { |
421cb601 | 642 | DBG2("Channel %s not found on shadow session copy, creating it", |
48842b30 | 643 | uchan->name); |
284d8f55 | 644 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); |
48842b30 DG |
645 | if (ua_chan == NULL) { |
646 | /* malloc failed... continuing */ | |
421cb601 | 647 | goto next; |
48842b30 | 648 | } |
421cb601 DG |
649 | |
650 | shadow_copy_channel(ua_chan, uchan); | |
48842b30 | 651 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); |
48842b30 DG |
652 | } |
653 | ||
421cb601 | 654 | next: |
48842b30 DG |
655 | /* Next item in hash table */ |
656 | hashtable_get_next(usess->domain_global.channels, &iter); | |
657 | } | |
658 | } | |
659 | ||
421cb601 DG |
660 | /* |
661 | * Return ust app session from the app session hashtable using the UST session | |
662 | * uid. | |
663 | */ | |
48842b30 DG |
664 | static struct ust_app_session *lookup_session_by_app( |
665 | struct ltt_ust_session *usess, struct ust_app *app) | |
666 | { | |
667 | struct cds_lfht_iter iter; | |
668 | struct cds_lfht_node *node; | |
669 | ||
670 | /* Get right UST app session from app */ | |
671 | node = hashtable_lookup(app->sessions, | |
421cb601 | 672 | (void *) ((unsigned long) usess->uid), sizeof(void *), &iter); |
48842b30 DG |
673 | if (node == NULL) { |
674 | goto error; | |
675 | } | |
676 | ||
677 | return caa_container_of(node, struct ust_app_session, node); | |
678 | ||
679 | error: | |
680 | return NULL; | |
681 | } | |
682 | ||
421cb601 DG |
683 | /* |
684 | * Create a UST session onto the tracer of app and add it the session | |
685 | * hashtable. | |
686 | * | |
687 | * Return ust app session or NULL on error. | |
688 | */ | |
689 | static struct ust_app_session *create_ust_app_session( | |
690 | struct ltt_ust_session *usess, struct ust_app *app) | |
691 | { | |
692 | int ret; | |
693 | struct ust_app_session *ua_sess; | |
694 | ||
695 | ua_sess = lookup_session_by_app(usess, app); | |
696 | if (ua_sess == NULL) { | |
697 | DBG2("UST app pid: %d session uid %d not found, creating it", | |
698 | app->key.pid, usess->uid); | |
699 | ua_sess = alloc_ust_app_session(); | |
700 | if (ua_sess == NULL) { | |
701 | /* Only malloc can failed so something is really wrong */ | |
702 | goto error; | |
703 | } | |
704 | shadow_copy_session(ua_sess, usess); | |
705 | } | |
706 | ||
707 | if (ua_sess->handle == -1) { | |
708 | ret = ustctl_create_session(app->key.sock); | |
709 | if (ret < 0) { | |
710 | ERR("Error creating session for app pid %d, sock %d", | |
711 | app->key.pid, app->key.sock); | |
712 | /* TODO: free() ua_sess */ | |
713 | goto error; | |
714 | } | |
715 | ||
716 | DBG2("UST app ustctl create session handle %d", ret); | |
717 | ua_sess->handle = ret; | |
718 | ||
719 | /* Add ust app session to app's HT */ | |
720 | hashtable_node_init(&ua_sess->node, | |
721 | (void *)((unsigned long) ua_sess->uid), sizeof(void *)); | |
722 | hashtable_add_unique(app->sessions, &ua_sess->node); | |
723 | ||
724 | DBG2("UST app session created successfully with handle %d", ret); | |
725 | } | |
726 | ||
727 | return ua_sess; | |
728 | ||
729 | error: | |
730 | return NULL; | |
731 | } | |
732 | ||
284d8f55 DG |
733 | /* |
734 | * Create the specified channel onto the UST tracer for a UST session. | |
735 | */ | |
736 | static int create_ust_channel(struct ust_app *app, | |
737 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
738 | { | |
739 | int ret; | |
740 | ||
741 | /* TODO: remove cast and use lttng-ust-abi.h */ | |
742 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
743 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); | |
744 | if (ret < 0) { | |
745 | DBG("Error creating channel %s for app (pid: %d, sock: %d) " | |
746 | "and session handle %d with ret %d", | |
747 | ua_chan->name, app->key.pid, app->key.sock, | |
748 | ua_sess->handle, ret); | |
749 | goto error; | |
750 | } | |
751 | ||
752 | ua_chan->handle = ua_chan->obj->handle; | |
753 | ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; | |
754 | ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; | |
755 | ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; | |
756 | ||
757 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", | |
758 | ua_chan->name, app->key.pid, app->key.sock); | |
759 | ||
760 | error: | |
761 | return ret; | |
762 | } | |
763 | ||
764 | /* | |
765 | * Create the specified event onto the UST tracer for a UST session. | |
766 | */ | |
767 | static int create_ust_event(struct ust_app *app, | |
768 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan, | |
769 | struct ust_app_event *ua_event) | |
770 | { | |
771 | int ret = 0; | |
772 | ||
773 | /* Create UST event on tracer */ | |
774 | ret = ustctl_create_event(app->key.sock, &ua_event->attr, ua_chan->obj, | |
775 | &ua_event->obj); | |
776 | if (ret < 0) { | |
777 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
778 | ua_event->attr.name, app->key.pid, ret); | |
779 | goto error; | |
780 | } | |
781 | ||
782 | ua_event->handle = ua_event->obj->handle; | |
783 | ua_event->enabled = 1; | |
784 | ||
785 | DBG2("UST app event %s created successfully for pid:%d", | |
786 | ua_event->attr.name, app->key.pid); | |
787 | ||
788 | error: | |
789 | return ret; | |
790 | } | |
791 | ||
421cb601 DG |
792 | static struct ust_app_channel *create_ust_app_channel( |
793 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
794 | struct ust_app *app) | |
795 | { | |
796 | int ret = 0; | |
797 | struct cds_lfht_iter iter; | |
798 | struct cds_lfht_node *ua_chan_node; | |
799 | struct ust_app_channel *ua_chan; | |
800 | ||
801 | /* Lookup channel in the ust app session */ | |
802 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
803 | (void *)uchan->name, strlen(uchan->name), &iter); | |
804 | if (ua_chan_node == NULL) { | |
805 | DBG2("Unable to find channel %s in ust session uid %u", | |
806 | uchan->name, ua_sess->uid); | |
284d8f55 | 807 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); |
421cb601 DG |
808 | if (ua_chan == NULL) { |
809 | goto error; | |
810 | } | |
811 | shadow_copy_channel(ua_chan, uchan); | |
284d8f55 | 812 | |
421cb601 DG |
813 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); |
814 | } else { | |
815 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
816 | } | |
817 | ||
284d8f55 | 818 | ret = create_ust_channel(app, ua_sess, ua_chan); |
421cb601 | 819 | if (ret < 0) { |
421cb601 DG |
820 | goto error; |
821 | } | |
822 | ||
421cb601 DG |
823 | return ua_chan; |
824 | ||
825 | error: | |
826 | return NULL; | |
827 | } | |
828 | ||
829 | static struct ust_app_event *create_ust_app_event( | |
830 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan, | |
831 | struct ltt_ust_event *uevent, struct ust_app *app) | |
832 | { | |
833 | int ret; | |
834 | struct cds_lfht_iter iter; | |
835 | struct cds_lfht_node *ua_event_node; | |
836 | struct ust_app_event *ua_event; | |
837 | ||
838 | /* Get event node */ | |
839 | ua_event_node = hashtable_lookup(ua_chan->events, | |
840 | (void *)uevent->attr.name, strlen(uevent->attr.name), &iter); | |
841 | if (ua_event_node == NULL) { | |
842 | DBG2("UST app event %s not found, creating it", uevent->attr.name); | |
843 | /* Does not exist so create one */ | |
284d8f55 | 844 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
421cb601 DG |
845 | if (ua_event == NULL) { |
846 | /* Only malloc can failed so something is really wrong */ | |
847 | goto error; | |
848 | } | |
849 | shadow_copy_event(ua_event, uevent); | |
850 | ||
851 | hashtable_add_unique(ua_chan->events, &ua_event->node); | |
852 | } else { | |
853 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
854 | } | |
855 | ||
284d8f55 | 856 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
421cb601 | 857 | if (ret < 0) { |
421cb601 DG |
858 | goto error; |
859 | } | |
421cb601 DG |
860 | |
861 | return ua_event; | |
862 | ||
863 | error: | |
864 | return NULL; | |
865 | } | |
866 | ||
867 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
868 | char *pathname, struct ust_app *app) | |
869 | { | |
870 | int ret = 0; | |
871 | struct lttng_ust_channel_attr uattr; | |
872 | ||
873 | if (ua_sess->metadata == NULL) { | |
874 | /* Allocate UST metadata */ | |
875 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
876 | if (ua_sess->metadata == NULL) { | |
877 | ERR("UST app session %d creating metadata failed", | |
878 | ua_sess->handle); | |
879 | goto error; | |
880 | } | |
881 | ||
882 | uattr.overwrite = ua_sess->metadata->attr.overwrite; | |
883 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
884 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
885 | uattr.switch_timer_interval = | |
886 | ua_sess->metadata->attr.switch_timer_interval; | |
887 | uattr.read_timer_interval = | |
888 | ua_sess->metadata->attr.read_timer_interval; | |
889 | uattr.output = ua_sess->metadata->attr.output; | |
890 | ||
891 | /* UST tracer metadata creation */ | |
892 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
893 | &ua_sess->metadata->obj); | |
894 | if (ret < 0) { | |
895 | ERR("UST app open metadata failed for app pid:%d", | |
896 | app->key.pid); | |
897 | goto error; | |
898 | } | |
899 | ||
900 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
901 | } | |
902 | ||
903 | /* Open UST metadata stream */ | |
904 | if (ua_sess->metadata->stream_obj == NULL) { | |
905 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, | |
906 | &ua_sess->metadata->stream_obj); | |
907 | if (ret < 0) { | |
908 | ERR("UST create metadata stream failed"); | |
909 | goto error; | |
910 | } | |
911 | ||
912 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, "%s/%s-%d", | |
913 | pathname, app->name, app->key.pid); | |
914 | if (ret < 0) { | |
915 | PERROR("asprintf UST create stream"); | |
916 | goto error; | |
917 | } | |
918 | ||
919 | ret = mkdir(ua_sess->metadata->pathname, S_IRWXU | S_IRWXG); | |
920 | if (ret < 0) { | |
921 | PERROR("mkdir UST metadata"); | |
922 | goto error; | |
923 | } | |
924 | ||
925 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, "%s/%s-%d/metadata", | |
926 | pathname, app->name, app->key.pid); | |
927 | if (ret < 0) { | |
928 | PERROR("asprintf UST create stream"); | |
929 | goto error; | |
930 | } | |
931 | ||
932 | DBG2("UST metadata stream object created for app pid %d", | |
933 | app->key.pid); | |
934 | } | |
935 | ||
936 | return 0; | |
937 | ||
938 | error: | |
939 | return -1; | |
940 | } | |
941 | ||
942 | /* | |
943 | * Add channel to all ust app session. | |
944 | */ | |
945 | int ust_app_add_channel_all(struct ltt_ust_session *usess, | |
48842b30 DG |
946 | struct ltt_ust_channel *uchan) |
947 | { | |
948 | int ret = 0; | |
949 | struct cds_lfht_iter iter; | |
421cb601 | 950 | struct cds_lfht_node *node; |
48842b30 DG |
951 | struct ust_app *app; |
952 | struct ust_app_session *ua_sess; | |
953 | struct ust_app_channel *ua_chan; | |
954 | ||
421cb601 DG |
955 | if (usess == NULL || uchan == NULL) { |
956 | ERR("Adding UST global channel to NULL values"); | |
957 | ret = -1; | |
958 | goto error; | |
959 | } | |
960 | ||
48842b30 DG |
961 | DBG2("UST app adding channel %s to global domain for session uid %d", |
962 | uchan->name, usess->uid); | |
963 | ||
964 | rcu_read_lock(); | |
421cb601 DG |
965 | |
966 | /* For every UST applications registered */ | |
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) { |
48842b30 DG |
974 | goto next; |
975 | } | |
976 | ||
421cb601 DG |
977 | /* Create channel onto application */ |
978 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
979 | if (ua_chan == NULL) { | |
48842b30 DG |
980 | goto next; |
981 | } | |
982 | ||
48842b30 DG |
983 | next: |
984 | /* Next applications */ | |
985 | hashtable_get_next(ust_app_ht, &iter); | |
986 | } | |
987 | rcu_read_unlock(); | |
988 | ||
421cb601 | 989 | error: |
48842b30 DG |
990 | return ret; |
991 | } | |
992 | ||
421cb601 | 993 | int ust_app_add_event_all(struct ltt_ust_session *usess, |
48842b30 DG |
994 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
995 | { | |
996 | int ret = 0; | |
997 | struct cds_lfht_iter iter; | |
421cb601 | 998 | struct cds_lfht_node *node, *ua_chan_node; |
48842b30 DG |
999 | struct ust_app *app; |
1000 | struct ust_app_session *ua_sess; | |
1001 | struct ust_app_channel *ua_chan; | |
1002 | struct ust_app_event *ua_event; | |
48842b30 | 1003 | |
284d8f55 | 1004 | DBG("UST app creating event %s for all apps for session uid %d", |
48842b30 DG |
1005 | uevent->attr.name, usess->uid); |
1006 | ||
1007 | rcu_read_lock(); | |
421cb601 DG |
1008 | |
1009 | /* For all registered applications */ | |
48842b30 DG |
1010 | hashtable_get_first(ust_app_ht, &iter); |
1011 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
1012 | app = caa_container_of(node, struct ust_app, node); | |
1013 | ||
421cb601 DG |
1014 | /* Create session on the tracer side and add it to app session HT */ |
1015 | ua_sess = create_ust_app_session(usess, app); | |
509cbaf8 | 1016 | if (ua_sess == NULL) { |
421cb601 | 1017 | goto next; |
48842b30 DG |
1018 | } |
1019 | ||
1020 | /* Lookup channel in the ust app session */ | |
1021 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
421cb601 | 1022 | (void *)uchan->name, strlen(uchan->name), &iter); |
48842b30 | 1023 | if (ua_chan_node == NULL) { |
421cb601 DG |
1024 | ERR("Channel %s not found in session uid %d. Skipping", |
1025 | uchan->name, usess->uid); | |
48842b30 DG |
1026 | goto next; |
1027 | } | |
48842b30 DG |
1028 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1029 | ||
421cb601 DG |
1030 | ua_event = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1031 | if (ua_event == NULL) { | |
1032 | goto next; | |
48842b30 DG |
1033 | } |
1034 | ||
48842b30 DG |
1035 | next: |
1036 | /* Next applications */ | |
1037 | hashtable_get_next(ust_app_ht, &iter); | |
1038 | } | |
1039 | rcu_read_unlock(); | |
1040 | ||
1041 | return ret; | |
1042 | } | |
1043 | ||
421cb601 | 1044 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1045 | { |
1046 | int ret = 0; | |
1047 | struct cds_lfht_iter iter; | |
421cb601 | 1048 | struct cds_lfht_node *node; |
48842b30 DG |
1049 | struct ust_app_session *ua_sess; |
1050 | struct ust_app_channel *ua_chan; | |
48842b30 | 1051 | |
421cb601 | 1052 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 1053 | |
509cbaf8 MD |
1054 | rcu_read_lock(); |
1055 | ||
421cb601 DG |
1056 | ua_sess = lookup_session_by_app(usess, app); |
1057 | if (ua_sess == NULL) { | |
1058 | /* Only malloc can failed so something is really wrong */ | |
509cbaf8 | 1059 | goto error_rcu_unlock; |
421cb601 | 1060 | } |
48842b30 | 1061 | |
421cb601 DG |
1062 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1063 | if (ret < 0) { | |
509cbaf8 | 1064 | goto error_rcu_unlock; |
421cb601 | 1065 | } |
48842b30 | 1066 | |
421cb601 DG |
1067 | /* For each channel */ |
1068 | hashtable_get_first(ua_sess->channels, &iter); | |
1069 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
1070 | ua_chan = caa_container_of(node, struct ust_app_channel, node); | |
48842b30 | 1071 | |
421cb601 DG |
1072 | /* Create all streams */ |
1073 | while (1) { | |
1074 | struct ltt_ust_stream *ustream; | |
48842b30 | 1075 | |
421cb601 DG |
1076 | ustream = zmalloc(sizeof(*ustream)); |
1077 | if (ustream == NULL) { | |
1078 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1079 | goto error_rcu_unlock; |
421cb601 | 1080 | } |
48842b30 | 1081 | |
421cb601 DG |
1082 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
1083 | &ustream->obj); | |
48842b30 | 1084 | if (ret < 0) { |
421cb601 DG |
1085 | /* Got all streams */ |
1086 | break; | |
48842b30 | 1087 | } |
421cb601 | 1088 | ustream->handle = ustream->obj->handle; |
48842b30 | 1089 | |
421cb601 DG |
1090 | /* Order is important */ |
1091 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
1092 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s-%d/%s_%u", | |
1093 | usess->pathname, app->name, app->key.pid, | |
1094 | ua_chan->name, ua_chan->streams.count++); | |
aba8e916 DG |
1095 | if (ret < 0) { |
1096 | PERROR("asprintf UST create stream"); | |
421cb601 | 1097 | continue; |
aba8e916 | 1098 | } |
421cb601 DG |
1099 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1100 | ustream->pathname); | |
1101 | } | |
aba8e916 | 1102 | |
421cb601 DG |
1103 | /* Next applications */ |
1104 | hashtable_get_next(ua_sess->channels, &iter); | |
1105 | } | |
aba8e916 | 1106 | |
421cb601 DG |
1107 | /* Setup UST consumer socket and send fds to it */ |
1108 | ret = ust_consumer_send_session(usess->consumer_fd, ua_sess); | |
1109 | if (ret < 0) { | |
509cbaf8 | 1110 | goto error_rcu_unlock; |
421cb601 | 1111 | } |
48842b30 | 1112 | |
421cb601 DG |
1113 | /* This start the UST tracing */ |
1114 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
1115 | if (ret < 0) { | |
1116 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 1117 | goto error_rcu_unlock; |
421cb601 | 1118 | } |
509cbaf8 | 1119 | rcu_read_unlock(); |
48842b30 | 1120 | |
421cb601 DG |
1121 | /* Quiescent wait after starting trace */ |
1122 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 1123 | |
421cb601 | 1124 | return 0; |
48842b30 | 1125 | |
509cbaf8 MD |
1126 | error_rcu_unlock: |
1127 | rcu_read_unlock(); | |
421cb601 DG |
1128 | return -1; |
1129 | } | |
48842b30 | 1130 | |
421cb601 DG |
1131 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
1132 | { | |
1133 | int ret = 0; | |
1134 | struct cds_lfht_iter iter; | |
1135 | struct cds_lfht_node *node; | |
1136 | struct ust_app *app; | |
48842b30 | 1137 | |
421cb601 DG |
1138 | DBG("Starting all UST traces"); |
1139 | ||
1140 | rcu_read_lock(); | |
1141 | hashtable_get_first(ust_app_ht, &iter); | |
1142 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
1143 | app = caa_container_of(node, struct ust_app, node); | |
1144 | ||
1145 | ret = ust_app_start_trace(usess, app); | |
48842b30 | 1146 | if (ret < 0) { |
48842b30 DG |
1147 | goto next; |
1148 | } | |
1149 | ||
48842b30 DG |
1150 | next: |
1151 | /* Next applications */ | |
1152 | hashtable_get_next(ust_app_ht, &iter); | |
1153 | } | |
1154 | rcu_read_unlock(); | |
1155 | ||
1156 | return 0; | |
1157 | } | |
487cf67c DG |
1158 | |
1159 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) | |
1160 | { | |
1161 | int ret = 0; | |
487cf67c | 1162 | struct cds_lfht_iter iter; |
487cf67c DG |
1163 | struct ust_app *app; |
1164 | struct ust_app_session *ua_sess; | |
1165 | struct ust_app_channel *ua_chan; | |
1166 | struct ust_app_event *ua_event; | |
1f3580c7 DG |
1167 | |
1168 | if (usess == NULL) { | |
1169 | DBG2("No UST session on global update. Returning"); | |
1170 | goto error; | |
1171 | } | |
1172 | ||
487cf67c DG |
1173 | DBG2("UST app global update for app sock %d for session uid %d", sock, |
1174 | usess->uid); | |
1175 | ||
284d8f55 DG |
1176 | rcu_read_lock(); |
1177 | ||
487cf67c DG |
1178 | app = find_app_by_sock(sock); |
1179 | if (app == NULL) { | |
1180 | ERR("Failed to update app sock %d", sock); | |
1181 | goto error; | |
1182 | } | |
1183 | ||
421cb601 | 1184 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 1185 | if (ua_sess == NULL) { |
487cf67c DG |
1186 | goto error; |
1187 | } | |
1188 | ||
284d8f55 DG |
1189 | /* |
1190 | * We can iterate safely here over all UST app session sicne the create ust | |
1191 | * app session above made a shadow copy of the UST global domain from the | |
1192 | * ltt ust session. | |
1193 | */ | |
1194 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { | |
1195 | ret = create_ust_channel(app, ua_sess, ua_chan); | |
1196 | if (ret < 0) { | |
1197 | /* FIXME: Should we quit here or continue... */ | |
1198 | continue; | |
487cf67c DG |
1199 | } |
1200 | ||
284d8f55 DG |
1201 | /* For each events */ |
1202 | cds_lfht_for_each_entry(ua_chan->events, &iter, ua_event, node) { | |
1203 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); | |
1204 | if (ret < 0) { | |
1205 | /* FIXME: Should we quit here or continue... */ | |
1206 | continue; | |
487cf67c | 1207 | } |
36dc12cc | 1208 | } |
487cf67c DG |
1209 | } |
1210 | ||
36dc12cc | 1211 | if (usess->start_trace) { |
421cb601 | 1212 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 1213 | if (ret < 0) { |
36dc12cc DG |
1214 | goto error; |
1215 | } | |
1216 | ||
36dc12cc DG |
1217 | DBG2("UST trace started for app pid %d", app->key.pid); |
1218 | } | |
1219 | ||
487cf67c DG |
1220 | error: |
1221 | rcu_read_unlock(); | |
1222 | return; | |
1223 | } |