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 | |
0df502fd | 29 | #include <urcu/compiler.h> |
1e307fab | 30 | #include <lttngerr.h> |
48842b30 | 31 | #include <lttng-share.h> |
1e307fab | 32 | |
f6a9efaa | 33 | #include "hashtable.h" |
56fff090 | 34 | #include "ust-app.h" |
48842b30 | 35 | #include "ust-consumer.h" |
d80a6244 DG |
36 | #include "ust-ctl.h" |
37 | ||
38 | /* | |
39 | * Delete ust app event safely. RCU read lock must be held before calling | |
40 | * this function. | |
41 | */ | |
42 | static void delete_ust_app_event(int sock, struct ust_app_event *ua_event) | |
43 | { | |
44 | /* TODO : remove context */ | |
45 | //struct ust_app_ctx *ltctx; | |
46 | //cds_lfht_for_each_entry(lte->ctx, &iter, ltctx, node) { | |
47 | // delete_ust_app_ctx(sock, ltctx); | |
48 | //} | |
49 | ||
50 | ustctl_release_object(sock, ua_event->obj); | |
84cd17c6 | 51 | free(ua_event->obj); |
d80a6244 DG |
52 | free(ua_event); |
53 | } | |
54 | ||
55 | /* | |
56 | * Delete ust app stream safely. RCU read lock must be held before calling | |
57 | * this function. | |
58 | */ | |
59 | static void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream) | |
60 | { | |
84cd17c6 MD |
61 | ustctl_release_object(sock, stream->obj); |
62 | free(stream->obj); | |
63 | free(stream); | |
d80a6244 DG |
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) { | |
84cd17c6 | 78 | cds_list_del(&stream->list); |
d80a6244 DG |
79 | delete_ust_app_stream(sock, stream); |
80 | } | |
81 | ||
82 | /* TODO : remove channel context */ | |
83 | //cds_lfht_for_each_entry(ltc->ctx, &iter, ltctx, node) { | |
84 | // hashtable_del(ltc->ctx, &iter); | |
85 | // delete_ust_app_ctx(sock, ltctx); | |
86 | //} | |
87 | //ret = hashtable_destroy(ltc->ctx); | |
88 | ||
89 | cds_lfht_for_each_entry(ua_chan->events, &iter, ua_event, node) { | |
90 | hashtable_del(ua_chan->events, &iter); | |
91 | delete_ust_app_event(sock, ua_event); | |
92 | } | |
93 | ||
94 | ret = hashtable_destroy(ua_chan->events); | |
95 | if (ret < 0) { | |
96 | ERR("UST app destroy session hashtable failed"); | |
97 | goto error; | |
98 | } | |
84cd17c6 MD |
99 | ustctl_release_object(sock, ua_chan->obj); |
100 | free(ua_chan->obj); | |
101 | free(ua_chan); | |
d80a6244 DG |
102 | |
103 | error: | |
104 | return; | |
105 | } | |
106 | ||
107 | /* | |
108 | * Delete ust app session safely. RCU read lock must be held before calling | |
109 | * this function. | |
110 | */ | |
111 | static void delete_ust_app_session(int sock, | |
112 | struct ust_app_session *ua_sess) | |
113 | { | |
114 | int ret; | |
115 | struct cds_lfht_iter iter; | |
116 | struct ust_app_channel *ua_chan; | |
117 | ||
118 | if (ua_sess->metadata) { | |
84cd17c6 MD |
119 | ustctl_release_object(sock, ua_sess->metadata->stream_obj); |
120 | free(ua_sess->metadata->stream_obj); | |
121 | ustctl_release_object(sock, ua_sess->metadata->obj); | |
122 | free(ua_sess->metadata->obj); | |
d80a6244 DG |
123 | } |
124 | ||
125 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { | |
126 | hashtable_del(ua_sess->channels, &iter); | |
127 | delete_ust_app_channel(sock, ua_chan); | |
128 | } | |
129 | ||
130 | ret = hashtable_destroy(ua_sess->channels); | |
131 | if (ret < 0) { | |
132 | ERR("UST app destroy session hashtable failed"); | |
133 | goto error; | |
134 | } | |
135 | ||
136 | error: | |
137 | return; | |
138 | } | |
91d76f53 DG |
139 | |
140 | /* | |
284d8f55 DG |
141 | * Delete a traceable application structure from the global list. Never call |
142 | * this function outside of a call_rcu call. | |
91d76f53 | 143 | */ |
284d8f55 | 144 | static void delete_ust_app(struct ust_app *app) |
91d76f53 | 145 | { |
f6a9efaa DG |
146 | int ret; |
147 | struct cds_lfht_node *node; | |
148 | struct cds_lfht_iter iter; | |
284d8f55 | 149 | struct ust_app_session *ua_sess; |
6414a713 | 150 | int sock; |
44d3bd01 | 151 | |
f6a9efaa | 152 | rcu_read_lock(); |
44d3bd01 | 153 | |
f6a9efaa DG |
154 | /* Remove from key hash table */ |
155 | node = hashtable_lookup(ust_app_sock_key_map, | |
284d8f55 | 156 | (void *) ((unsigned long) app->key.sock), sizeof(void *), &iter); |
f6a9efaa | 157 | if (node == NULL) { |
284d8f55 DG |
158 | /* Not suppose to happen */ |
159 | ERR("UST app key %d not found in key hash table", app->key.sock); | |
d80a6244 | 160 | goto end; |
284d8f55 DG |
161 | } |
162 | ||
163 | ret = hashtable_del(ust_app_sock_key_map, &iter); | |
164 | if (ret) { | |
165 | ERR("UST app unable to delete app sock %d from key hash table", | |
166 | app->key.sock); | |
f6a9efaa | 167 | } else { |
284d8f55 DG |
168 | DBG2("UST app pair sock %d key %d deleted", |
169 | app->key.sock, app->key.pid); | |
f6a9efaa DG |
170 | } |
171 | ||
d80a6244 DG |
172 | /* Socket is already closed at this point */ |
173 | ||
174 | /* Delete ust app sessions info */ | |
6414a713 MD |
175 | sock = app->key.sock; |
176 | app->key.sock = -1; | |
d80a6244 | 177 | |
284d8f55 DG |
178 | cds_lfht_for_each_entry(app->sessions, &iter, ua_sess, node) { |
179 | hashtable_del(app->sessions, &iter); | |
180 | delete_ust_app_session(app->key.sock, ua_sess); | |
d80a6244 | 181 | } |
f6a9efaa | 182 | |
284d8f55 | 183 | ret = hashtable_destroy(app->sessions); |
d80a6244 DG |
184 | if (ret < 0) { |
185 | ERR("UST app destroy session hashtable failed"); | |
186 | goto end; | |
187 | } | |
188 | ||
6414a713 MD |
189 | /* |
190 | * Wait until we have removed the key from the sock hash table | |
191 | * before closing this socket, otherwise an application could | |
192 | * re-use the socket ID and race with the teardown, using the | |
193 | * same hash table entry. | |
194 | */ | |
195 | close(sock); | |
d80a6244 | 196 | |
284d8f55 DG |
197 | DBG2("UST app pid %d deleted", app->key.pid); |
198 | free(app); | |
d80a6244 | 199 | end: |
f6a9efaa | 200 | rcu_read_unlock(); |
099e26bd DG |
201 | } |
202 | ||
203 | /* | |
f6a9efaa | 204 | * URCU intermediate call to delete an UST app. |
099e26bd | 205 | */ |
f6a9efaa | 206 | static void delete_ust_app_rcu(struct rcu_head *head) |
099e26bd | 207 | { |
f6a9efaa DG |
208 | struct cds_lfht_node *node = |
209 | caa_container_of(head, struct cds_lfht_node, head); | |
210 | struct ust_app *app = | |
211 | caa_container_of(node, struct ust_app, node); | |
212 | ||
213 | delete_ust_app(app); | |
099e26bd DG |
214 | } |
215 | ||
216 | /* | |
421cb601 DG |
217 | * Find an ust_app using the sock and return it. RCU read side lock must be |
218 | * held before calling this helper function. | |
099e26bd | 219 | */ |
f6a9efaa | 220 | static struct ust_app *find_app_by_sock(int sock) |
099e26bd | 221 | { |
f6a9efaa DG |
222 | struct cds_lfht_node *node; |
223 | struct ust_app_key *key; | |
224 | struct cds_lfht_iter iter; | |
f6a9efaa | 225 | |
f6a9efaa DG |
226 | node = hashtable_lookup(ust_app_sock_key_map, |
227 | (void *)((unsigned long) sock), sizeof(void *), &iter); | |
228 | if (node == NULL) { | |
229 | DBG2("UST app find by sock %d key not found", sock); | |
f6a9efaa DG |
230 | goto error; |
231 | } | |
232 | ||
233 | key = caa_container_of(node, struct ust_app_key, node); | |
234 | ||
235 | node = hashtable_lookup(ust_app_ht, | |
236 | (void *)((unsigned long) key->pid), sizeof(void *), &iter); | |
237 | if (node == NULL) { | |
238 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
239 | goto error; |
240 | } | |
f6a9efaa DG |
241 | return caa_container_of(node, struct ust_app, node); |
242 | ||
243 | error: | |
244 | return NULL; | |
099e26bd DG |
245 | } |
246 | ||
78f0bacd DG |
247 | /* |
248 | * Disable the specified channel on to UST tracer for the UST session. | |
249 | */ | |
250 | static int disable_ust_channel(struct ust_app *app, | |
251 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
252 | { | |
253 | int ret; | |
254 | ||
255 | ret = ustctl_disable(app->key.sock, ua_chan->obj); | |
256 | if (ret < 0) { | |
257 | ERR("UST app channel %s disable failed for app (pid: %d) " | |
258 | "and session handle %d with ret %d", | |
259 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
260 | goto error; | |
261 | } | |
262 | ||
263 | ua_chan->enabled = 0; | |
264 | ||
265 | DBG2("UST app channel %s disabled successfully for app (pid: %d)", | |
266 | ua_chan->name, app->key.pid); | |
267 | ||
268 | error: | |
269 | return ret; | |
270 | } | |
271 | ||
272 | /* | |
273 | * Enable the specified channel on to UST tracer for the UST session. | |
274 | */ | |
275 | static int enable_ust_channel(struct ust_app *app, | |
276 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
277 | { | |
278 | int ret; | |
279 | ||
280 | ret = ustctl_enable(app->key.sock, ua_chan->obj); | |
281 | if (ret < 0) { | |
282 | ERR("UST app channel %s enable failed for app (pid: %d) " | |
283 | "and session handle %d with ret %d", | |
284 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
285 | goto error; | |
286 | } | |
287 | ||
288 | ua_chan->enabled = 1; | |
289 | ||
290 | DBG2("UST app channel %s enabled successfully for app (pid: %d)", | |
291 | ua_chan->name, app->key.pid); | |
292 | ||
293 | error: | |
294 | return ret; | |
295 | } | |
296 | ||
099e26bd | 297 | /* |
5b4a0ec0 | 298 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 299 | */ |
5b4a0ec0 DG |
300 | static int open_ust_metadata(struct ust_app *app, |
301 | struct ust_app_session *ua_sess) | |
0177d773 | 302 | { |
5b4a0ec0 DG |
303 | int ret; |
304 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 305 | |
5b4a0ec0 DG |
306 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
307 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
308 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
309 | uattr.switch_timer_interval = | |
310 | ua_sess->metadata->attr.switch_timer_interval; | |
311 | uattr.read_timer_interval = | |
312 | ua_sess->metadata->attr.read_timer_interval; | |
313 | uattr.output = ua_sess->metadata->attr.output; | |
314 | ||
315 | /* UST tracer metadata creation */ | |
316 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
317 | &ua_sess->metadata->obj); | |
318 | if (ret < 0) { | |
319 | ERR("UST app open metadata failed for app pid:%d", | |
320 | app->key.pid); | |
f6a9efaa | 321 | goto error; |
0177d773 | 322 | } |
f6a9efaa DG |
323 | |
324 | error: | |
5b4a0ec0 | 325 | return ret; |
91d76f53 DG |
326 | } |
327 | ||
328 | /* | |
5b4a0ec0 | 329 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 330 | */ |
5b4a0ec0 DG |
331 | static int create_ust_stream(struct ust_app *app, |
332 | struct ust_app_session *ua_sess) | |
91d76f53 | 333 | { |
5b4a0ec0 | 334 | int ret; |
421cb601 | 335 | |
5b4a0ec0 DG |
336 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, |
337 | &ua_sess->metadata->stream_obj); | |
338 | if (ret < 0) { | |
339 | ERR("UST create metadata stream failed"); | |
421cb601 | 340 | goto error; |
91d76f53 | 341 | } |
421cb601 | 342 | |
421cb601 | 343 | error: |
5b4a0ec0 | 344 | return ret; |
91d76f53 DG |
345 | } |
346 | ||
b551a063 | 347 | /* |
5b4a0ec0 | 348 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 349 | */ |
5b4a0ec0 DG |
350 | static int create_ust_channel(struct ust_app *app, |
351 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 352 | { |
5b4a0ec0 | 353 | int ret; |
b551a063 | 354 | |
5b4a0ec0 DG |
355 | /* TODO: remove cast and use lttng-ust-abi.h */ |
356 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
357 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); | |
358 | if (ret < 0) { | |
359 | DBG("Error creating channel %s for app (pid: %d, sock: %d) " | |
360 | "and session handle %d with ret %d", | |
361 | ua_chan->name, app->key.pid, app->key.sock, | |
362 | ua_sess->handle, ret); | |
b551a063 DG |
363 | goto error; |
364 | } | |
365 | ||
5b4a0ec0 DG |
366 | ua_chan->handle = ua_chan->obj->handle; |
367 | ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; | |
368 | ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; | |
369 | ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; | |
b551a063 | 370 | |
5b4a0ec0 DG |
371 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
372 | ua_chan->name, app->key.pid, app->key.sock); | |
b551a063 | 373 | |
b551a063 DG |
374 | error: |
375 | return ret; | |
376 | } | |
377 | ||
91d76f53 | 378 | /* |
5b4a0ec0 | 379 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 380 | */ |
5b4a0ec0 DG |
381 | static int create_ust_event(struct ust_app *app, |
382 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan, | |
383 | struct ust_app_event *ua_event) | |
91d76f53 | 384 | { |
5b4a0ec0 | 385 | int ret = 0; |
284d8f55 | 386 | |
5b4a0ec0 DG |
387 | /* Create UST event on tracer */ |
388 | ret = ustctl_create_event(app->key.sock, &ua_event->attr, ua_chan->obj, | |
389 | &ua_event->obj); | |
390 | if (ret < 0) { | |
391 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
392 | ua_event->attr.name, app->key.pid, ret); | |
393 | goto error; | |
91d76f53 | 394 | } |
f6a9efaa | 395 | |
5b4a0ec0 DG |
396 | ua_event->handle = ua_event->obj->handle; |
397 | ua_event->enabled = 1; | |
284d8f55 | 398 | |
5b4a0ec0 DG |
399 | DBG2("UST app event %s created successfully for pid:%d", |
400 | ua_event->attr.name, app->key.pid); | |
f6a9efaa | 401 | |
5b4a0ec0 DG |
402 | error: |
403 | return ret; | |
91d76f53 | 404 | } |
48842b30 DG |
405 | |
406 | /* | |
407 | * Alloc new UST app session. | |
408 | */ | |
421cb601 | 409 | static struct ust_app_session *alloc_ust_app_session(void) |
48842b30 DG |
410 | { |
411 | struct ust_app_session *ua_sess; | |
412 | ||
421cb601 | 413 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
414 | ua_sess = zmalloc(sizeof(struct ust_app_session)); |
415 | if (ua_sess == NULL) { | |
416 | PERROR("malloc"); | |
417 | goto error; | |
418 | } | |
419 | ||
48842b30 DG |
420 | ua_sess->handle = -1; |
421 | ua_sess->channels = hashtable_new_str(0); | |
48842b30 DG |
422 | |
423 | return ua_sess; | |
424 | ||
425 | error: | |
426 | return NULL; | |
427 | } | |
428 | ||
421cb601 DG |
429 | /* |
430 | * Alloc new UST app channel. | |
431 | */ | |
284d8f55 DG |
432 | static struct ust_app_channel *alloc_ust_app_channel(char *name, |
433 | struct lttng_ust_channel *attr) | |
48842b30 DG |
434 | { |
435 | struct ust_app_channel *ua_chan; | |
436 | ||
421cb601 | 437 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
438 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); |
439 | if (ua_chan == NULL) { | |
440 | PERROR("malloc"); | |
441 | goto error; | |
442 | } | |
443 | ||
284d8f55 | 444 | /* Setup channel name */ |
48842b30 DG |
445 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); |
446 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
284d8f55 | 447 | |
48842b30 | 448 | ua_chan->handle = -1; |
48842b30 | 449 | ua_chan->ctx = hashtable_new(0); |
48842b30 DG |
450 | ua_chan->events = hashtable_new_str(0); |
451 | hashtable_node_init(&ua_chan->node, (void *) ua_chan->name, | |
452 | strlen(ua_chan->name)); | |
453 | ||
284d8f55 DG |
454 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); |
455 | ||
456 | /* Copy attributes */ | |
457 | if (attr) { | |
458 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
459 | } | |
460 | ||
48842b30 DG |
461 | DBG3("UST app channel %s allocated", ua_chan->name); |
462 | ||
463 | return ua_chan; | |
464 | ||
465 | error: | |
466 | return NULL; | |
467 | } | |
468 | ||
421cb601 DG |
469 | /* |
470 | * Alloc new UST app event. | |
471 | */ | |
284d8f55 DG |
472 | static struct ust_app_event *alloc_ust_app_event(char *name, |
473 | struct lttng_ust_event *attr) | |
48842b30 DG |
474 | { |
475 | struct ust_app_event *ua_event; | |
476 | ||
421cb601 | 477 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
478 | ua_event = zmalloc(sizeof(struct ust_app_event)); |
479 | if (ua_event == NULL) { | |
480 | PERROR("malloc"); | |
481 | goto error; | |
482 | } | |
483 | ||
484 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
485 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
486 | ua_event->ctx = hashtable_new(0); | |
487 | hashtable_node_init(&ua_event->node, (void *) ua_event->name, | |
488 | strlen(ua_event->name)); | |
489 | ||
284d8f55 DG |
490 | /* Copy attributes */ |
491 | if (attr) { | |
492 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
493 | } | |
494 | ||
48842b30 DG |
495 | DBG3("UST app event %s allocated", ua_event->name); |
496 | ||
497 | return ua_event; | |
498 | ||
499 | error: | |
500 | return NULL; | |
501 | } | |
502 | ||
5b4a0ec0 DG |
503 | /* |
504 | * Copy data between an UST app event and a LTT event. | |
505 | */ | |
421cb601 | 506 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
507 | struct ltt_ust_event *uevent) |
508 | { | |
509 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); | |
510 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
511 | ||
5b4a0ec0 DG |
512 | /* Copy event attributes */ |
513 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
514 | ||
48842b30 DG |
515 | /* TODO: support copy context */ |
516 | } | |
517 | ||
5b4a0ec0 DG |
518 | /* |
519 | * Copy data between an UST app channel and a LTT channel. | |
520 | */ | |
421cb601 | 521 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
522 | struct ltt_ust_channel *uchan) |
523 | { | |
524 | struct cds_lfht_iter iter; | |
5b4a0ec0 | 525 | struct cds_lfht_node *ua_event_node; |
48842b30 DG |
526 | struct ltt_ust_event *uevent; |
527 | struct ust_app_event *ua_event; | |
528 | ||
421cb601 | 529 | DBG2("Shadow copy of UST app channel %s", ua_chan->name); |
48842b30 DG |
530 | |
531 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
532 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
533 | /* Copy event attributes */ |
534 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 DG |
535 | |
536 | /* TODO: support copy context */ | |
537 | ||
421cb601 | 538 | /* Copy all events from ltt ust channel to ust app channel */ |
5b4a0ec0 | 539 | cds_lfht_for_each_entry(uchan->events, &iter, uevent, node) { |
ba767faf MD |
540 | struct cds_lfht_iter uiter; |
541 | ||
48842b30 | 542 | ua_event_node = hashtable_lookup(ua_chan->events, |
ba767faf MD |
543 | (void *) uevent->attr.name, strlen(uevent->attr.name), |
544 | &uiter); | |
48842b30 | 545 | if (ua_event_node == NULL) { |
421cb601 | 546 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 547 | uevent->attr.name); |
284d8f55 | 548 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 549 | if (ua_event == NULL) { |
5b4a0ec0 | 550 | continue; |
48842b30 | 551 | } |
421cb601 | 552 | shadow_copy_event(ua_event, uevent); |
48842b30 | 553 | hashtable_add_unique(ua_chan->events, &ua_event->node); |
48842b30 | 554 | } |
48842b30 DG |
555 | } |
556 | ||
421cb601 | 557 | DBG3("Shadow copy channel done"); |
48842b30 DG |
558 | } |
559 | ||
5b4a0ec0 DG |
560 | /* |
561 | * Copy data between a UST app session and a regular LTT session. | |
562 | */ | |
421cb601 | 563 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
477d7741 MD |
564 | struct ltt_ust_session *usess, |
565 | struct ust_app *app) | |
48842b30 | 566 | { |
5b4a0ec0 | 567 | struct cds_lfht_node *ua_chan_node; |
48842b30 DG |
568 | struct cds_lfht_iter iter; |
569 | struct ltt_ust_channel *uchan; | |
570 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
571 | time_t rawtime; |
572 | struct tm *timeinfo; | |
573 | char datetime[16]; | |
574 | int ret; | |
575 | ||
576 | /* Get date and time for unique app path */ | |
577 | time(&rawtime); | |
578 | timeinfo = localtime(&rawtime); | |
579 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 580 | |
421cb601 | 581 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 DG |
582 | |
583 | ua_sess->uid = usess->uid; | |
584 | ||
477d7741 MD |
585 | ret = snprintf(ua_sess->path, PATH_MAX, |
586 | "%s/%s-%d-%s", | |
587 | usess->pathname, app->name, app->key.pid, | |
588 | datetime); | |
589 | if (ret < 0) { | |
590 | PERROR("asprintf UST shadow copy session"); | |
591 | /* TODO: We cannot return an error from here.. */ | |
592 | assert(0); | |
593 | } | |
594 | ||
48842b30 DG |
595 | /* TODO: support all UST domain */ |
596 | ||
597 | /* Iterate over all channels in global domain. */ | |
5b4a0ec0 DG |
598 | cds_lfht_for_each_entry(usess->domain_global.channels, &iter, |
599 | uchan, node) { | |
ba767faf MD |
600 | struct cds_lfht_iter uiter; |
601 | ||
48842b30 | 602 | ua_chan_node = hashtable_lookup(ua_sess->channels, |
ba767faf MD |
603 | (void *)uchan->name, strlen(uchan->name), |
604 | &uiter); | |
5b4a0ec0 DG |
605 | if (ua_chan_node != NULL) { |
606 | continue; | |
607 | } | |
421cb601 | 608 | |
5b4a0ec0 DG |
609 | DBG2("Channel %s not found on shadow session copy, creating it", |
610 | uchan->name); | |
611 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
612 | if (ua_chan == NULL) { | |
613 | /* malloc failed... continuing */ | |
614 | continue; | |
48842b30 DG |
615 | } |
616 | ||
5b4a0ec0 DG |
617 | shadow_copy_channel(ua_chan, uchan); |
618 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
48842b30 DG |
619 | } |
620 | } | |
621 | ||
78f0bacd DG |
622 | /* |
623 | * Lookup sesison wrapper. | |
624 | */ | |
84cd17c6 MD |
625 | static |
626 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
627 | struct ust_app *app, struct cds_lfht_iter *iter) | |
628 | { | |
629 | /* Get right UST app session from app */ | |
630 | (void) hashtable_lookup(app->sessions, | |
631 | (void *) ((unsigned long) usess->uid), sizeof(void *), | |
632 | iter); | |
633 | } | |
634 | ||
421cb601 DG |
635 | /* |
636 | * Return ust app session from the app session hashtable using the UST session | |
637 | * uid. | |
638 | */ | |
48842b30 DG |
639 | static struct ust_app_session *lookup_session_by_app( |
640 | struct ltt_ust_session *usess, struct ust_app *app) | |
641 | { | |
642 | struct cds_lfht_iter iter; | |
643 | struct cds_lfht_node *node; | |
644 | ||
84cd17c6 MD |
645 | __lookup_session_by_app(usess, app, &iter); |
646 | node = hashtable_iter_get_node(&iter); | |
48842b30 DG |
647 | if (node == NULL) { |
648 | goto error; | |
649 | } | |
650 | ||
651 | return caa_container_of(node, struct ust_app_session, node); | |
652 | ||
653 | error: | |
654 | return NULL; | |
655 | } | |
656 | ||
421cb601 DG |
657 | /* |
658 | * Create a UST session onto the tracer of app and add it the session | |
659 | * hashtable. | |
660 | * | |
661 | * Return ust app session or NULL on error. | |
662 | */ | |
663 | static struct ust_app_session *create_ust_app_session( | |
664 | struct ltt_ust_session *usess, struct ust_app *app) | |
665 | { | |
666 | int ret; | |
667 | struct ust_app_session *ua_sess; | |
668 | ||
669 | ua_sess = lookup_session_by_app(usess, app); | |
670 | if (ua_sess == NULL) { | |
671 | DBG2("UST app pid: %d session uid %d not found, creating it", | |
672 | app->key.pid, usess->uid); | |
673 | ua_sess = alloc_ust_app_session(); | |
674 | if (ua_sess == NULL) { | |
675 | /* Only malloc can failed so something is really wrong */ | |
676 | goto error; | |
677 | } | |
477d7741 | 678 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
679 | } |
680 | ||
681 | if (ua_sess->handle == -1) { | |
682 | ret = ustctl_create_session(app->key.sock); | |
683 | if (ret < 0) { | |
684 | ERR("Error creating session for app pid %d, sock %d", | |
685 | app->key.pid, app->key.sock); | |
686 | /* TODO: free() ua_sess */ | |
687 | goto error; | |
688 | } | |
689 | ||
690 | DBG2("UST app ustctl create session handle %d", ret); | |
691 | ua_sess->handle = ret; | |
692 | ||
693 | /* Add ust app session to app's HT */ | |
694 | hashtable_node_init(&ua_sess->node, | |
695 | (void *)((unsigned long) ua_sess->uid), sizeof(void *)); | |
696 | hashtable_add_unique(app->sessions, &ua_sess->node); | |
697 | ||
698 | DBG2("UST app session created successfully with handle %d", ret); | |
699 | } | |
700 | ||
701 | return ua_sess; | |
702 | ||
703 | error: | |
704 | return NULL; | |
705 | } | |
706 | ||
78f0bacd DG |
707 | /* |
708 | * Lookup ust app channel for session and disable it on the tracer side. | |
709 | */ | |
710 | static int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
711 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
712 | { | |
713 | int ret = 0; | |
714 | struct cds_lfht_iter iter; | |
715 | struct cds_lfht_node *ua_chan_node; | |
716 | struct ust_app_channel *ua_chan; | |
717 | ||
718 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
719 | (void *)uchan->name, strlen(uchan->name), &iter); | |
720 | if (ua_chan_node == NULL) { | |
721 | DBG2("Unable to find channel %s in ust session uid %u", | |
722 | uchan->name, ua_sess->uid); | |
723 | goto error; | |
724 | } | |
725 | ||
726 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
727 | ||
728 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
729 | if (ret < 0) { | |
730 | goto error; | |
731 | } | |
732 | ||
733 | error: | |
734 | return ret; | |
735 | } | |
736 | ||
737 | /* | |
738 | * Lookup ust app channel for session and enable it on the tracer side. | |
739 | */ | |
740 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
741 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
742 | { | |
743 | int ret = 0; | |
744 | struct cds_lfht_iter iter; | |
745 | struct cds_lfht_node *ua_chan_node; | |
746 | struct ust_app_channel *ua_chan; | |
747 | ||
748 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
749 | (void *)uchan->name, strlen(uchan->name), &iter); | |
750 | if (ua_chan_node == NULL) { | |
751 | DBG2("Unable to find channel %s in ust session uid %u", | |
752 | uchan->name, ua_sess->uid); | |
753 | goto error; | |
754 | } | |
755 | ||
756 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
757 | ||
758 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
759 | if (ret < 0) { | |
760 | goto error; | |
761 | } | |
762 | ||
763 | error: | |
764 | return ret; | |
765 | } | |
766 | ||
284d8f55 | 767 | /* |
5b4a0ec0 | 768 | * Create UST app channel and create it on the tracer. |
284d8f55 | 769 | */ |
5b4a0ec0 DG |
770 | static struct ust_app_channel *create_ust_app_channel( |
771 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
772 | struct ust_app *app) | |
773 | { | |
774 | int ret = 0; | |
775 | struct cds_lfht_iter iter; | |
776 | struct cds_lfht_node *ua_chan_node; | |
777 | struct ust_app_channel *ua_chan; | |
778 | ||
779 | /* Lookup channel in the ust app session */ | |
780 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
781 | (void *)uchan->name, strlen(uchan->name), &iter); | |
782 | if (ua_chan_node == NULL) { | |
783 | DBG2("Unable to find channel %s in ust session uid %u", | |
784 | uchan->name, ua_sess->uid); | |
785 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
786 | if (ua_chan == NULL) { | |
787 | goto error; | |
788 | } | |
789 | shadow_copy_channel(ua_chan, uchan); | |
790 | ||
791 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
792 | } else { | |
793 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
794 | } | |
795 | ||
796 | ret = create_ust_channel(app, ua_sess, ua_chan); | |
797 | if (ret < 0) { | |
798 | goto error; | |
799 | } | |
800 | ||
801 | return ua_chan; | |
802 | ||
803 | error: | |
804 | return NULL; | |
805 | } | |
806 | ||
807 | /* | |
808 | * Create UST app event and create it on the tracer side. | |
809 | */ | |
810 | static struct ust_app_event *create_ust_app_event( | |
811 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan, | |
812 | struct ltt_ust_event *uevent, struct ust_app *app) | |
284d8f55 DG |
813 | { |
814 | int ret; | |
5b4a0ec0 DG |
815 | struct cds_lfht_iter iter; |
816 | struct cds_lfht_node *ua_event_node; | |
817 | struct ust_app_event *ua_event; | |
284d8f55 | 818 | |
5b4a0ec0 DG |
819 | /* Get event node */ |
820 | ua_event_node = hashtable_lookup(ua_chan->events, | |
821 | (void *)uevent->attr.name, strlen(uevent->attr.name), &iter); | |
822 | if (ua_event_node == NULL) { | |
823 | DBG2("UST app event %s not found, creating it", uevent->attr.name); | |
824 | /* Does not exist so create one */ | |
825 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
826 | if (ua_event == NULL) { | |
827 | /* Only malloc can failed so something is really wrong */ | |
828 | goto error; | |
829 | } | |
830 | shadow_copy_event(ua_event, uevent); | |
831 | ||
832 | hashtable_add_unique(ua_chan->events, &ua_event->node); | |
833 | } else { | |
834 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
835 | } | |
836 | ||
837 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); | |
284d8f55 | 838 | if (ret < 0) { |
284d8f55 DG |
839 | goto error; |
840 | } | |
841 | ||
5b4a0ec0 | 842 | return ua_event; |
284d8f55 | 843 | |
5b4a0ec0 DG |
844 | error: |
845 | return NULL; | |
846 | } | |
847 | ||
848 | /* | |
849 | * Create UST metadata and open it on the tracer side. | |
850 | */ | |
851 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
852 | char *pathname, struct ust_app *app) | |
853 | { | |
854 | int ret = 0; | |
855 | ||
856 | if (ua_sess->metadata == NULL) { | |
857 | /* Allocate UST metadata */ | |
858 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
859 | if (ua_sess->metadata == NULL) { | |
860 | ERR("UST app session %d creating metadata failed", | |
861 | ua_sess->handle); | |
862 | goto error; | |
863 | } | |
864 | ||
865 | ret = open_ust_metadata(app, ua_sess); | |
866 | if (ret < 0) { | |
867 | goto error; | |
868 | } | |
869 | ||
870 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
871 | } | |
872 | ||
873 | /* Open UST metadata stream */ | |
874 | if (ua_sess->metadata->stream_obj == NULL) { | |
875 | ret = create_ust_stream(app, ua_sess); | |
876 | if (ret < 0) { | |
877 | goto error; | |
878 | } | |
879 | ||
477d7741 | 880 | ret = mkdir(ua_sess->path, S_IRWXU | S_IRWXG); |
5b4a0ec0 DG |
881 | if (ret < 0) { |
882 | PERROR("mkdir UST metadata"); | |
883 | goto error; | |
884 | } | |
885 | ||
477d7741 MD |
886 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
887 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
888 | if (ret < 0) { |
889 | PERROR("asprintf UST create stream"); | |
890 | goto error; | |
891 | } | |
892 | ||
893 | DBG2("UST metadata stream object created for app pid %d", | |
894 | app->key.pid); | |
895 | } else { | |
896 | ERR("Attempting to create stream without metadata opened"); | |
897 | goto error; | |
898 | } | |
899 | ||
900 | return 0; | |
901 | ||
902 | error: | |
903 | return -1; | |
904 | } | |
905 | ||
906 | /* | |
907 | * Return pointer to traceable apps list. | |
908 | */ | |
909 | struct cds_lfht *ust_app_get_ht(void) | |
910 | { | |
911 | return ust_app_ht; | |
912 | } | |
913 | ||
914 | /* | |
915 | * Return ust app pointer or NULL if not found. | |
916 | */ | |
917 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
918 | { | |
919 | struct cds_lfht_node *node; | |
920 | struct cds_lfht_iter iter; | |
921 | ||
922 | rcu_read_lock(); | |
923 | node = hashtable_lookup(ust_app_ht, | |
924 | (void *)((unsigned long) pid), sizeof(void *), &iter); | |
925 | if (node == NULL) { | |
926 | DBG2("UST app no found with pid %d", pid); | |
927 | goto error; | |
928 | } | |
929 | rcu_read_unlock(); | |
930 | ||
931 | DBG2("Found UST app by pid %d", pid); | |
932 | ||
933 | return caa_container_of(node, struct ust_app, node); | |
934 | ||
935 | error: | |
936 | rcu_read_unlock(); | |
937 | return NULL; | |
938 | } | |
939 | ||
940 | /* | |
941 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
942 | * add it to the global traceable app list. | |
943 | * | |
0df502fd MD |
944 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
945 | * bitness is not supported. | |
5b4a0ec0 DG |
946 | */ |
947 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
948 | { | |
949 | struct ust_app *lta; | |
950 | ||
7753dea8 MD |
951 | if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL) |
952 | || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) { | |
f943b0fb | 953 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
954 | "%d-bit long, but no consumerd for this long size is available.\n", |
955 | msg->name, msg->pid, msg->bits_per_long); | |
88ff5b7f | 956 | close(sock); |
0df502fd MD |
957 | return -EINVAL; |
958 | } | |
5b4a0ec0 DG |
959 | lta = zmalloc(sizeof(struct ust_app)); |
960 | if (lta == NULL) { | |
961 | PERROR("malloc"); | |
962 | return -ENOMEM; | |
963 | } | |
964 | ||
965 | lta->ppid = msg->ppid; | |
966 | lta->uid = msg->uid; | |
967 | lta->gid = msg->gid; | |
7753dea8 | 968 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
969 | lta->v_major = msg->major; |
970 | lta->v_minor = msg->minor; | |
971 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
972 | lta->name[16] = '\0'; | |
973 | lta->sessions = hashtable_new(0); | |
974 | ||
975 | /* Set key map */ | |
976 | lta->key.pid = msg->pid; | |
977 | hashtable_node_init(<a->node, (void *)((unsigned long)lta->key.pid), | |
978 | sizeof(void *)); | |
979 | lta->key.sock = sock; | |
980 | hashtable_node_init(<a->key.node, (void *)((unsigned long)lta->key.sock), | |
981 | sizeof(void *)); | |
982 | ||
983 | rcu_read_lock(); | |
984 | hashtable_add_unique(ust_app_sock_key_map, <a->key.node); | |
985 | hashtable_add_unique(ust_app_ht, <a->node); | |
986 | rcu_read_unlock(); | |
987 | ||
988 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
989 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, | |
990 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
991 | ||
992 | return 0; | |
993 | } | |
994 | ||
995 | /* | |
996 | * Unregister app by removing it from the global traceable app list and freeing | |
997 | * the data struct. | |
998 | * | |
999 | * The socket is already closed at this point so no close to sock. | |
1000 | */ | |
1001 | void ust_app_unregister(int sock) | |
1002 | { | |
1003 | struct ust_app *lta; | |
1004 | struct cds_lfht_node *node; | |
1005 | struct cds_lfht_iter iter; | |
1006 | ||
1007 | rcu_read_lock(); | |
1008 | lta = find_app_by_sock(sock); | |
1009 | if (lta == NULL) { | |
1010 | ERR("Unregister app sock %d not found!", sock); | |
1011 | goto error; | |
1012 | } | |
1013 | ||
1014 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
1015 | ||
1016 | /* Get the node reference for a call_rcu */ | |
1017 | node = hashtable_lookup(ust_app_ht, | |
1018 | (void *)((unsigned long) lta->key.pid), sizeof(void *), &iter); | |
1019 | if (node == NULL) { | |
1020 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
1021 | goto error; | |
1022 | } | |
284d8f55 | 1023 | |
5b4a0ec0 DG |
1024 | hashtable_del(ust_app_ht, &iter); |
1025 | call_rcu(&node->head, delete_ust_app_rcu); | |
284d8f55 | 1026 | error: |
5b4a0ec0 DG |
1027 | rcu_read_unlock(); |
1028 | return; | |
284d8f55 DG |
1029 | } |
1030 | ||
1031 | /* | |
5b4a0ec0 | 1032 | * Return traceable_app_count |
284d8f55 | 1033 | */ |
5b4a0ec0 | 1034 | unsigned long ust_app_list_count(void) |
284d8f55 | 1035 | { |
5b4a0ec0 | 1036 | unsigned long count; |
284d8f55 | 1037 | |
5b4a0ec0 DG |
1038 | rcu_read_lock(); |
1039 | count = hashtable_get_count(ust_app_ht); | |
1040 | rcu_read_unlock(); | |
284d8f55 | 1041 | |
5b4a0ec0 | 1042 | return count; |
284d8f55 DG |
1043 | } |
1044 | ||
5b4a0ec0 DG |
1045 | /* |
1046 | * Fill events array with all events name of all registered apps. | |
1047 | */ | |
1048 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1049 | { |
5b4a0ec0 DG |
1050 | int ret, handle; |
1051 | size_t nbmem, count = 0; | |
421cb601 | 1052 | struct cds_lfht_iter iter; |
5b4a0ec0 DG |
1053 | struct ust_app *app; |
1054 | struct lttng_event *tmp; | |
421cb601 | 1055 | |
5b4a0ec0 DG |
1056 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1057 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1058 | if (tmp == NULL) { | |
1059 | PERROR("zmalloc ust app events"); | |
1060 | ret = -ENOMEM; | |
421cb601 DG |
1061 | goto error; |
1062 | } | |
1063 | ||
5b4a0ec0 | 1064 | rcu_read_lock(); |
421cb601 | 1065 | |
5b4a0ec0 DG |
1066 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
1067 | handle = ustctl_tracepoint_list(app->key.sock); | |
1068 | if (handle < 0) { | |
1069 | ERR("UST app list events getting handle failed for app pid %d", | |
1070 | app->key.pid); | |
1071 | continue; | |
1072 | } | |
421cb601 | 1073 | |
5b4a0ec0 DG |
1074 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, |
1075 | tmp[count].name)) != -ENOENT) { | |
1076 | if (count > nbmem) { | |
1077 | DBG2("Reallocating event list from %zu to %zu bytes", nbmem, | |
1078 | nbmem + UST_APP_EVENT_LIST_SIZE); | |
1079 | nbmem += UST_APP_EVENT_LIST_SIZE; | |
1080 | tmp = realloc(tmp, nbmem); | |
1081 | if (tmp == NULL) { | |
1082 | PERROR("realloc ust app events"); | |
1083 | ret = -ENOMEM; | |
1084 | goto rcu_error; | |
1085 | } | |
1086 | } | |
421cb601 | 1087 | |
5b4a0ec0 DG |
1088 | tmp[count].type = LTTNG_UST_TRACEPOINT; |
1089 | tmp[count].pid = app->key.pid; | |
1090 | tmp[count].enabled = -1; | |
1091 | count++; | |
421cb601 | 1092 | } |
421cb601 DG |
1093 | } |
1094 | ||
5b4a0ec0 DG |
1095 | ret = count; |
1096 | *events = tmp; | |
421cb601 | 1097 | |
5b4a0ec0 | 1098 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1099 | |
5b4a0ec0 DG |
1100 | rcu_error: |
1101 | rcu_read_unlock(); | |
421cb601 | 1102 | error: |
5b4a0ec0 | 1103 | return ret; |
421cb601 DG |
1104 | } |
1105 | ||
5b4a0ec0 DG |
1106 | /* |
1107 | * Free and clean all traceable apps of the global list. | |
1108 | */ | |
1109 | void ust_app_clean_list(void) | |
421cb601 | 1110 | { |
5b4a0ec0 DG |
1111 | int ret; |
1112 | struct cds_lfht_node *node; | |
1113 | struct cds_lfht_iter iter; | |
1114 | struct ust_app *app; | |
421cb601 | 1115 | |
5b4a0ec0 | 1116 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1117 | |
5b4a0ec0 | 1118 | rcu_read_lock(); |
421cb601 | 1119 | |
5b4a0ec0 DG |
1120 | cds_lfht_for_each(ust_app_ht, &iter, node) { |
1121 | app = caa_container_of(node, struct ust_app, node); | |
421cb601 | 1122 | |
5b4a0ec0 DG |
1123 | ret = hashtable_del(ust_app_ht, &iter); |
1124 | if (!ret) { | |
1125 | call_rcu(&node->head, delete_ust_app_rcu); | |
421cb601 | 1126 | } |
421cb601 DG |
1127 | } |
1128 | ||
5b4a0ec0 DG |
1129 | hashtable_destroy(ust_app_ht); |
1130 | hashtable_destroy(ust_app_sock_key_map); | |
421cb601 | 1131 | |
5b4a0ec0 DG |
1132 | rcu_read_unlock(); |
1133 | } | |
1134 | ||
1135 | /* | |
1136 | * Init UST app hash table. | |
1137 | */ | |
1138 | void ust_app_ht_alloc(void) | |
1139 | { | |
1140 | ust_app_ht = hashtable_new(0); | |
1141 | ust_app_sock_key_map = hashtable_new(0); | |
421cb601 DG |
1142 | } |
1143 | ||
78f0bacd DG |
1144 | /* |
1145 | * For a specific UST session, disable the channel for all registered apps. | |
1146 | */ | |
1147 | int ust_app_disable_channel_all(struct ltt_ust_session *usess, | |
1148 | struct ltt_ust_channel *uchan) | |
1149 | { | |
1150 | int ret = 0; | |
1151 | struct cds_lfht_iter iter; | |
1152 | struct ust_app *app; | |
1153 | struct ust_app_session *ua_sess; | |
1154 | ||
1155 | if (usess == NULL || uchan == NULL) { | |
1156 | ERR("Disabling UST global channel with NULL values"); | |
1157 | ret = -1; | |
1158 | goto error; | |
1159 | } | |
1160 | ||
1161 | DBG2("UST app disablling channel %s from global domain for session uid %d", | |
1162 | uchan->name, usess->uid); | |
1163 | ||
1164 | rcu_read_lock(); | |
1165 | ||
1166 | /* For every registered applications */ | |
1167 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1168 | ua_sess = lookup_session_by_app(usess, app); | |
1169 | if (ua_sess == NULL) { | |
1170 | continue; | |
1171 | } | |
1172 | ||
1173 | /* Create channel onto application */ | |
1174 | ret = disable_ust_app_channel(ua_sess, uchan, app); | |
1175 | if (ret < 0) { | |
1176 | /* XXX: We might want to report this error at some point... */ | |
1177 | continue; | |
1178 | } | |
1179 | } | |
1180 | ||
1181 | rcu_read_unlock(); | |
1182 | ||
1183 | error: | |
1184 | return ret; | |
1185 | } | |
1186 | ||
1187 | /* | |
1188 | * For a specific UST session, enable the channel for all registered apps. | |
1189 | */ | |
1190 | int ust_app_enable_channel_all(struct ltt_ust_session *usess, | |
1191 | struct ltt_ust_channel *uchan) | |
1192 | { | |
1193 | int ret = 0; | |
1194 | struct cds_lfht_iter iter; | |
1195 | struct ust_app *app; | |
1196 | struct ust_app_session *ua_sess; | |
1197 | ||
1198 | if (usess == NULL || uchan == NULL) { | |
1199 | ERR("Adding UST global channel to NULL values"); | |
1200 | ret = -1; | |
1201 | goto error; | |
1202 | } | |
1203 | ||
1204 | DBG2("UST app enabling channel %s to global domain for session uid %d", | |
1205 | uchan->name, usess->uid); | |
1206 | ||
1207 | rcu_read_lock(); | |
1208 | ||
1209 | /* For every registered applications */ | |
1210 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1211 | ua_sess = lookup_session_by_app(usess, app); | |
1212 | if (ua_sess == NULL) { | |
1213 | continue; | |
1214 | } | |
1215 | ||
1216 | /* Enable channel onto application */ | |
1217 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1218 | if (ret < 0) { | |
1219 | /* XXX: We might want to report this error at some point... */ | |
1220 | continue; | |
1221 | } | |
1222 | } | |
1223 | ||
1224 | rcu_read_unlock(); | |
1225 | ||
1226 | error: | |
1227 | return ret; | |
1228 | } | |
1229 | ||
421cb601 | 1230 | /* |
5b4a0ec0 | 1231 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1232 | */ |
5b4a0ec0 | 1233 | int ust_app_create_channel_all(struct ltt_ust_session *usess, |
48842b30 DG |
1234 | struct ltt_ust_channel *uchan) |
1235 | { | |
1236 | int ret = 0; | |
1237 | struct cds_lfht_iter iter; | |
48842b30 DG |
1238 | struct ust_app *app; |
1239 | struct ust_app_session *ua_sess; | |
1240 | struct ust_app_channel *ua_chan; | |
1241 | ||
421cb601 DG |
1242 | if (usess == NULL || uchan == NULL) { |
1243 | ERR("Adding UST global channel to NULL values"); | |
1244 | ret = -1; | |
1245 | goto error; | |
1246 | } | |
1247 | ||
48842b30 DG |
1248 | DBG2("UST app adding channel %s to global domain for session uid %d", |
1249 | uchan->name, usess->uid); | |
1250 | ||
1251 | rcu_read_lock(); | |
421cb601 | 1252 | |
5b4a0ec0 DG |
1253 | /* For every registered applications */ |
1254 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
421cb601 DG |
1255 | /* Create session on the tracer side and add it to app session HT */ |
1256 | ua_sess = create_ust_app_session(usess, app); | |
509cbaf8 | 1257 | if (ua_sess == NULL) { |
5b4a0ec0 | 1258 | continue; |
48842b30 DG |
1259 | } |
1260 | ||
421cb601 DG |
1261 | /* Create channel onto application */ |
1262 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1263 | if (ua_chan == NULL) { | |
5b4a0ec0 | 1264 | continue; |
48842b30 | 1265 | } |
48842b30 | 1266 | } |
5b4a0ec0 | 1267 | |
48842b30 DG |
1268 | rcu_read_unlock(); |
1269 | ||
421cb601 | 1270 | error: |
48842b30 DG |
1271 | return ret; |
1272 | } | |
1273 | ||
5b4a0ec0 DG |
1274 | /* |
1275 | * For a specific UST session and UST channel, create the event for all | |
1276 | * registered apps. | |
1277 | */ | |
1278 | int ust_app_create_event_all(struct ltt_ust_session *usess, | |
48842b30 DG |
1279 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1280 | { | |
1281 | int ret = 0; | |
1282 | struct cds_lfht_iter iter; | |
5b4a0ec0 | 1283 | struct cds_lfht_node *ua_chan_node; |
48842b30 DG |
1284 | struct ust_app *app; |
1285 | struct ust_app_session *ua_sess; | |
1286 | struct ust_app_channel *ua_chan; | |
1287 | struct ust_app_event *ua_event; | |
48842b30 | 1288 | |
284d8f55 | 1289 | DBG("UST app creating event %s for all apps for session uid %d", |
48842b30 DG |
1290 | uevent->attr.name, usess->uid); |
1291 | ||
1292 | rcu_read_lock(); | |
421cb601 DG |
1293 | |
1294 | /* For all registered applications */ | |
5b4a0ec0 | 1295 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
ba767faf MD |
1296 | struct cds_lfht_iter uiter; |
1297 | ||
421cb601 DG |
1298 | /* Create session on the tracer side and add it to app session HT */ |
1299 | ua_sess = create_ust_app_session(usess, app); | |
509cbaf8 | 1300 | if (ua_sess == NULL) { |
5b4a0ec0 | 1301 | continue; |
48842b30 DG |
1302 | } |
1303 | ||
1304 | /* Lookup channel in the ust app session */ | |
1305 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
ba767faf MD |
1306 | (void *)uchan->name, strlen(uchan->name), |
1307 | &uiter); | |
48842b30 | 1308 | if (ua_chan_node == NULL) { |
421cb601 DG |
1309 | ERR("Channel %s not found in session uid %d. Skipping", |
1310 | uchan->name, usess->uid); | |
5b4a0ec0 | 1311 | continue; |
48842b30 | 1312 | } |
48842b30 DG |
1313 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1314 | ||
421cb601 DG |
1315 | ua_event = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1316 | if (ua_event == NULL) { | |
5b4a0ec0 | 1317 | continue; |
48842b30 | 1318 | } |
48842b30 | 1319 | } |
5b4a0ec0 | 1320 | |
48842b30 DG |
1321 | rcu_read_unlock(); |
1322 | ||
1323 | return ret; | |
1324 | } | |
1325 | ||
5b4a0ec0 DG |
1326 | /* |
1327 | * Start tracing for a specific UST session and app. | |
1328 | */ | |
421cb601 | 1329 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1330 | { |
1331 | int ret = 0; | |
1332 | struct cds_lfht_iter iter; | |
48842b30 DG |
1333 | struct ust_app_session *ua_sess; |
1334 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 1335 | struct ltt_ust_stream *ustream; |
7753dea8 | 1336 | int consumerd_fd; |
48842b30 | 1337 | |
421cb601 | 1338 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 1339 | |
509cbaf8 MD |
1340 | rcu_read_lock(); |
1341 | ||
421cb601 DG |
1342 | ua_sess = lookup_session_by_app(usess, app); |
1343 | if (ua_sess == NULL) { | |
1344 | /* Only malloc can failed so something is really wrong */ | |
509cbaf8 | 1345 | goto error_rcu_unlock; |
421cb601 | 1346 | } |
48842b30 | 1347 | |
aea829b3 DG |
1348 | /* Upon restart, we skip the setup, already done */ |
1349 | if (ua_sess->started) { | |
8be98f9a | 1350 | goto skip_setup; |
aea829b3 | 1351 | } |
8be98f9a | 1352 | |
421cb601 DG |
1353 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1354 | if (ret < 0) { | |
509cbaf8 | 1355 | goto error_rcu_unlock; |
421cb601 | 1356 | } |
48842b30 | 1357 | |
421cb601 | 1358 | /* For each channel */ |
5b4a0ec0 | 1359 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { |
421cb601 DG |
1360 | /* Create all streams */ |
1361 | while (1) { | |
5b4a0ec0 | 1362 | /* Create UST stream */ |
421cb601 DG |
1363 | ustream = zmalloc(sizeof(*ustream)); |
1364 | if (ustream == NULL) { | |
1365 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1366 | goto error_rcu_unlock; |
421cb601 | 1367 | } |
48842b30 | 1368 | |
421cb601 DG |
1369 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
1370 | &ustream->obj); | |
48842b30 | 1371 | if (ret < 0) { |
421cb601 DG |
1372 | /* Got all streams */ |
1373 | break; | |
48842b30 | 1374 | } |
421cb601 | 1375 | ustream->handle = ustream->obj->handle; |
48842b30 | 1376 | |
421cb601 DG |
1377 | /* Order is important */ |
1378 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
477d7741 MD |
1379 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", |
1380 | ua_sess->path, ua_chan->name, | |
1381 | ua_chan->streams.count++); | |
aba8e916 DG |
1382 | if (ret < 0) { |
1383 | PERROR("asprintf UST create stream"); | |
421cb601 | 1384 | continue; |
aba8e916 | 1385 | } |
421cb601 DG |
1386 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1387 | ustream->pathname); | |
1388 | } | |
421cb601 | 1389 | } |
aba8e916 | 1390 | |
7753dea8 MD |
1391 | switch (app->bits_per_long) { |
1392 | case 64: | |
1393 | consumerd_fd = ust_consumerd64_fd; | |
1394 | break; | |
1395 | case 32: | |
1396 | consumerd_fd = ust_consumerd32_fd; | |
1397 | break; | |
1398 | default: | |
1399 | ret = -EINVAL; | |
1400 | goto error_rcu_unlock; | |
1401 | } | |
aea829b3 | 1402 | |
421cb601 | 1403 | /* Setup UST consumer socket and send fds to it */ |
7753dea8 | 1404 | ret = ust_consumer_send_session(consumerd_fd, ua_sess); |
421cb601 | 1405 | if (ret < 0) { |
509cbaf8 | 1406 | goto error_rcu_unlock; |
421cb601 | 1407 | } |
8be98f9a | 1408 | ua_sess->started = 1; |
48842b30 | 1409 | |
8be98f9a | 1410 | skip_setup: |
421cb601 DG |
1411 | /* This start the UST tracing */ |
1412 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
1413 | if (ret < 0) { | |
1414 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 1415 | goto error_rcu_unlock; |
421cb601 | 1416 | } |
5b4a0ec0 | 1417 | |
509cbaf8 | 1418 | rcu_read_unlock(); |
48842b30 | 1419 | |
421cb601 DG |
1420 | /* Quiescent wait after starting trace */ |
1421 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 1422 | |
421cb601 | 1423 | return 0; |
48842b30 | 1424 | |
509cbaf8 MD |
1425 | error_rcu_unlock: |
1426 | rcu_read_unlock(); | |
421cb601 DG |
1427 | return -1; |
1428 | } | |
48842b30 | 1429 | |
8be98f9a MD |
1430 | /* |
1431 | * Stop tracing for a specific UST session and app. | |
1432 | */ | |
1433 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1434 | { | |
1435 | int ret = 0; | |
1436 | struct ust_app_session *ua_sess; | |
1437 | ||
1438 | DBG("Stopping tracing for ust app pid %d", app->key.pid); | |
1439 | ||
1440 | rcu_read_lock(); | |
1441 | ||
1442 | ua_sess = lookup_session_by_app(usess, app); | |
1443 | if (ua_sess == NULL) { | |
1444 | /* Only malloc can failed so something is really wrong */ | |
1445 | goto error_rcu_unlock; | |
1446 | } | |
1447 | ||
1448 | #if 0 /* only useful when periodical flush will be supported */ | |
1449 | /* need to keep a handle on shm in session for this. */ | |
1450 | /* Flush all buffers before stopping */ | |
1451 | ret = ustctl_flush_buffer(usess->sock, usess->metadata->obj); | |
1452 | if (ret < 0) { | |
1453 | ERR("UST metadata flush failed"); | |
1454 | } | |
1455 | ||
1456 | cds_list_for_each_entry(ustchan, &usess->channels.head, list) { | |
1457 | ret = ustctl_flush_buffer(usess->sock, ustchan->obj); | |
1458 | if (ret < 0) { | |
1459 | ERR("UST flush buffer error"); | |
1460 | } | |
1461 | } | |
1462 | #endif | |
1463 | ||
1464 | /* This inhibits UST tracing */ | |
1465 | ret = ustctl_stop_session(app->key.sock, ua_sess->handle); | |
1466 | if (ret < 0) { | |
1467 | ERR("Error stopping tracing for app pid: %d", app->key.pid); | |
1468 | goto error_rcu_unlock; | |
1469 | } | |
1470 | ||
1471 | rcu_read_unlock(); | |
1472 | ||
1473 | /* Quiescent wait after stopping trace */ | |
1474 | ustctl_wait_quiescent(app->key.sock); | |
1475 | ||
1476 | return 0; | |
1477 | ||
1478 | error_rcu_unlock: | |
1479 | rcu_read_unlock(); | |
1480 | return -1; | |
1481 | } | |
1482 | ||
84cd17c6 MD |
1483 | /* |
1484 | * Destroy a specific UST session in apps. | |
1485 | */ | |
1486 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1487 | { | |
1488 | struct ust_app_session *ua_sess; | |
1489 | struct lttng_ust_object_data obj; | |
1490 | struct cds_lfht_iter iter; | |
1491 | struct cds_lfht_node *node; | |
1492 | ||
1493 | DBG("Destroy tracing for ust app pid %d", app->key.pid); | |
1494 | ||
1495 | rcu_read_lock(); | |
1496 | ||
1497 | __lookup_session_by_app(usess, app, &iter); | |
1498 | node = hashtable_iter_get_node(&iter); | |
1499 | if (node == NULL) { | |
1500 | /* Only malloc can failed so something is really wrong */ | |
1501 | goto error_rcu_unlock; | |
1502 | } | |
1503 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
1504 | hashtable_del(app->sessions, &iter); | |
1505 | delete_ust_app_session(app->key.sock, ua_sess); | |
1506 | obj.handle = ua_sess->handle; | |
1507 | obj.shm_fd = -1; | |
1508 | obj.wait_fd = -1; | |
1509 | obj.memory_map_size = 0; | |
1510 | ustctl_release_object(app->key.sock, &obj); | |
1511 | ||
1512 | rcu_read_unlock(); | |
1513 | ||
1514 | /* Quiescent wait after stopping trace */ | |
1515 | ustctl_wait_quiescent(app->key.sock); | |
1516 | ||
1517 | return 0; | |
1518 | ||
1519 | error_rcu_unlock: | |
1520 | rcu_read_unlock(); | |
1521 | return -1; | |
1522 | } | |
1523 | ||
5b4a0ec0 DG |
1524 | /* |
1525 | * Start tracing for the UST session. | |
1526 | */ | |
421cb601 DG |
1527 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
1528 | { | |
1529 | int ret = 0; | |
1530 | struct cds_lfht_iter iter; | |
421cb601 | 1531 | struct ust_app *app; |
48842b30 | 1532 | |
421cb601 DG |
1533 | DBG("Starting all UST traces"); |
1534 | ||
1535 | rcu_read_lock(); | |
421cb601 | 1536 | |
5b4a0ec0 | 1537 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
421cb601 | 1538 | ret = ust_app_start_trace(usess, app); |
48842b30 | 1539 | if (ret < 0) { |
5b4a0ec0 DG |
1540 | /* Continue to next apps even on error */ |
1541 | continue; | |
48842b30 | 1542 | } |
48842b30 | 1543 | } |
5b4a0ec0 | 1544 | |
48842b30 DG |
1545 | rcu_read_unlock(); |
1546 | ||
1547 | return 0; | |
1548 | } | |
487cf67c | 1549 | |
8be98f9a MD |
1550 | /* |
1551 | * Start tracing for the UST session. | |
1552 | */ | |
1553 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
1554 | { | |
1555 | int ret = 0; | |
1556 | struct cds_lfht_iter iter; | |
1557 | struct ust_app *app; | |
1558 | ||
1559 | DBG("Stopping all UST traces"); | |
1560 | ||
1561 | rcu_read_lock(); | |
1562 | ||
1563 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1564 | ret = ust_app_stop_trace(usess, app); | |
1565 | if (ret < 0) { | |
1566 | /* Continue to next apps even on error */ | |
1567 | continue; | |
1568 | } | |
1569 | } | |
1570 | ||
1571 | rcu_read_unlock(); | |
1572 | ||
1573 | return 0; | |
1574 | } | |
1575 | ||
84cd17c6 MD |
1576 | /* |
1577 | * Destroy app UST session. | |
1578 | */ | |
1579 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
1580 | { | |
1581 | int ret = 0; | |
1582 | struct cds_lfht_iter iter; | |
1583 | struct ust_app *app; | |
1584 | ||
1585 | DBG("Destroy all UST traces"); | |
1586 | ||
1587 | rcu_read_lock(); | |
1588 | ||
1589 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1590 | ret = ust_app_destroy_trace(usess, app); | |
1591 | if (ret < 0) { | |
1592 | /* Continue to next apps even on error */ | |
1593 | continue; | |
1594 | } | |
1595 | } | |
1596 | ||
1597 | rcu_read_unlock(); | |
1598 | ||
1599 | return 0; | |
1600 | } | |
1601 | ||
5b4a0ec0 DG |
1602 | /* |
1603 | * Add channels/events from UST global domain to registered apps at sock. | |
1604 | */ | |
487cf67c DG |
1605 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
1606 | { | |
1607 | int ret = 0; | |
487cf67c | 1608 | struct cds_lfht_iter iter; |
487cf67c DG |
1609 | struct ust_app *app; |
1610 | struct ust_app_session *ua_sess; | |
1611 | struct ust_app_channel *ua_chan; | |
1612 | struct ust_app_event *ua_event; | |
1f3580c7 DG |
1613 | |
1614 | if (usess == NULL) { | |
5b4a0ec0 | 1615 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
1616 | goto error; |
1617 | } | |
1618 | ||
487cf67c DG |
1619 | DBG2("UST app global update for app sock %d for session uid %d", sock, |
1620 | usess->uid); | |
1621 | ||
284d8f55 DG |
1622 | rcu_read_lock(); |
1623 | ||
487cf67c DG |
1624 | app = find_app_by_sock(sock); |
1625 | if (app == NULL) { | |
1626 | ERR("Failed to update app sock %d", sock); | |
1627 | goto error; | |
1628 | } | |
1629 | ||
421cb601 | 1630 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 1631 | if (ua_sess == NULL) { |
487cf67c DG |
1632 | goto error; |
1633 | } | |
1634 | ||
284d8f55 DG |
1635 | /* |
1636 | * We can iterate safely here over all UST app session sicne the create ust | |
1637 | * app session above made a shadow copy of the UST global domain from the | |
1638 | * ltt ust session. | |
1639 | */ | |
1640 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { | |
1641 | ret = create_ust_channel(app, ua_sess, ua_chan); | |
1642 | if (ret < 0) { | |
1643 | /* FIXME: Should we quit here or continue... */ | |
1644 | continue; | |
487cf67c DG |
1645 | } |
1646 | ||
284d8f55 DG |
1647 | /* For each events */ |
1648 | cds_lfht_for_each_entry(ua_chan->events, &iter, ua_event, node) { | |
1649 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); | |
1650 | if (ret < 0) { | |
1651 | /* FIXME: Should we quit here or continue... */ | |
1652 | continue; | |
487cf67c | 1653 | } |
36dc12cc | 1654 | } |
487cf67c DG |
1655 | } |
1656 | ||
36dc12cc | 1657 | if (usess->start_trace) { |
421cb601 | 1658 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 1659 | if (ret < 0) { |
36dc12cc DG |
1660 | goto error; |
1661 | } | |
1662 | ||
36dc12cc DG |
1663 | DBG2("UST trace started for app pid %d", app->key.pid); |
1664 | } | |
1665 | ||
487cf67c DG |
1666 | error: |
1667 | rcu_read_unlock(); | |
1668 | return; | |
1669 | } |