Commit | Line | Data |
---|---|---|
91d76f53 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
82a3637f DG |
6 | * as published by the Free Software Foundation; only version 2 |
7 | * of the License. | |
91d76f53 DG |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <errno.h> | |
21 | #include <pthread.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
099e26bd | 24 | #include <string.h> |
aba8e916 DG |
25 | #include <sys/stat.h> |
26 | #include <sys/types.h> | |
099e26bd | 27 | #include <unistd.h> |
60b6c79c | 28 | #include <runas.h> |
91d76f53 | 29 | |
0df502fd | 30 | #include <urcu/compiler.h> |
1e307fab | 31 | #include <lttngerr.h> |
48842b30 | 32 | #include <lttng-share.h> |
60b6c79c | 33 | #include <runas.h> |
1e307fab | 34 | |
daf282ab | 35 | #include "../common/hashtable.h" |
56fff090 | 36 | #include "ust-app.h" |
48842b30 | 37 | #include "ust-consumer.h" |
d80a6244 DG |
38 | #include "ust-ctl.h" |
39 | ||
55cc08a6 DG |
40 | /* |
41 | * Delete ust context safely. RCU read lock must be held before calling | |
42 | * this function. | |
43 | */ | |
44 | static | |
45 | void delete_ust_app_ctx(int sock, struct ust_app_ctx *ua_ctx) | |
46 | { | |
47 | if (ua_ctx->obj) { | |
48 | ustctl_release_object(sock, ua_ctx->obj); | |
49 | free(ua_ctx->obj); | |
50 | } | |
51 | free(ua_ctx); | |
52 | } | |
53 | ||
d80a6244 DG |
54 | /* |
55 | * Delete ust app event safely. RCU read lock must be held before calling | |
56 | * this function. | |
57 | */ | |
8b366481 DG |
58 | static |
59 | void delete_ust_app_event(int sock, struct ust_app_event *ua_event) | |
d80a6244 | 60 | { |
55cc08a6 DG |
61 | int ret; |
62 | struct cds_lfht_iter iter; | |
63 | struct ust_app_ctx *ua_ctx; | |
64 | ||
65 | cds_lfht_for_each_entry(ua_event->ctx, &iter, ua_ctx, node) { | |
66 | ret = hashtable_del(ua_event->ctx, &iter); | |
67 | assert(!ret); | |
68 | delete_ust_app_ctx(sock, ua_ctx); | |
69 | } | |
70 | ret = hashtable_destroy(ua_event->ctx); | |
71 | assert(!ret); | |
d80a6244 | 72 | |
edb67388 DG |
73 | if (ua_event->obj != NULL) { |
74 | ustctl_release_object(sock, ua_event->obj); | |
75 | free(ua_event->obj); | |
76 | } | |
d80a6244 DG |
77 | free(ua_event); |
78 | } | |
79 | ||
80 | /* | |
81 | * Delete ust app stream safely. RCU read lock must be held before calling | |
82 | * this function. | |
83 | */ | |
8b366481 DG |
84 | static |
85 | void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream) | |
d80a6244 | 86 | { |
8b366481 DG |
87 | if (stream->obj) { |
88 | ustctl_release_object(sock, stream->obj); | |
89 | free(stream->obj); | |
90 | } | |
84cd17c6 | 91 | free(stream); |
d80a6244 DG |
92 | } |
93 | ||
94 | /* | |
95 | * Delete ust app channel safely. RCU read lock must be held before calling | |
96 | * this function. | |
97 | */ | |
8b366481 DG |
98 | static |
99 | void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan) | |
d80a6244 DG |
100 | { |
101 | int ret; | |
102 | struct cds_lfht_iter iter; | |
103 | struct ust_app_event *ua_event; | |
55cc08a6 | 104 | struct ust_app_ctx *ua_ctx; |
d80a6244 DG |
105 | struct ltt_ust_stream *stream, *stmp; |
106 | ||
55cc08a6 | 107 | /* Wipe stream */ |
d80a6244 | 108 | cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) { |
84cd17c6 | 109 | cds_list_del(&stream->list); |
d80a6244 DG |
110 | delete_ust_app_stream(sock, stream); |
111 | } | |
112 | ||
55cc08a6 DG |
113 | /* Wipe context */ |
114 | cds_lfht_for_each_entry(ua_chan->ctx, &iter, ua_ctx, node) { | |
115 | ret = hashtable_del(ua_chan->ctx, &iter); | |
116 | assert(!ret); | |
117 | delete_ust_app_ctx(sock, ua_ctx); | |
118 | } | |
119 | ret = hashtable_destroy(ua_chan->ctx); | |
120 | assert(!ret); | |
d80a6244 | 121 | |
55cc08a6 | 122 | /* Wipe events */ |
d80a6244 | 123 | cds_lfht_for_each_entry(ua_chan->events, &iter, ua_event, node) { |
525b0740 MD |
124 | ret = hashtable_del(ua_chan->events, &iter); |
125 | assert(!ret); | |
d80a6244 DG |
126 | delete_ust_app_event(sock, ua_event); |
127 | } | |
d80a6244 | 128 | ret = hashtable_destroy(ua_chan->events); |
55cc08a6 | 129 | assert(!ret); |
edb67388 DG |
130 | |
131 | if (ua_chan->obj != NULL) { | |
132 | ustctl_release_object(sock, ua_chan->obj); | |
133 | free(ua_chan->obj); | |
134 | } | |
84cd17c6 | 135 | free(ua_chan); |
d80a6244 DG |
136 | } |
137 | ||
138 | /* | |
139 | * Delete ust app session safely. RCU read lock must be held before calling | |
140 | * this function. | |
141 | */ | |
8b366481 DG |
142 | static |
143 | void delete_ust_app_session(int sock, struct ust_app_session *ua_sess) | |
d80a6244 DG |
144 | { |
145 | int ret; | |
146 | struct cds_lfht_iter iter; | |
147 | struct ust_app_channel *ua_chan; | |
148 | ||
149 | if (ua_sess->metadata) { | |
8b366481 DG |
150 | if (ua_sess->metadata->stream_obj) { |
151 | ustctl_release_object(sock, ua_sess->metadata->stream_obj); | |
152 | free(ua_sess->metadata->stream_obj); | |
153 | } | |
154 | if (ua_sess->metadata->obj) { | |
155 | ustctl_release_object(sock, ua_sess->metadata->obj); | |
156 | free(ua_sess->metadata->obj); | |
157 | } | |
d80a6244 DG |
158 | } |
159 | ||
160 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { | |
525b0740 MD |
161 | ret = hashtable_del(ua_sess->channels, &iter); |
162 | assert(!ret); | |
d80a6244 DG |
163 | delete_ust_app_channel(sock, ua_chan); |
164 | } | |
d80a6244 | 165 | ret = hashtable_destroy(ua_sess->channels); |
8b366481 | 166 | assert(!ret); |
d80a6244 | 167 | |
aee6bafd MD |
168 | if (ua_sess->handle != -1) { |
169 | ustctl_release_handle(sock, ua_sess->handle); | |
170 | } | |
8b366481 | 171 | free(ua_sess); |
d80a6244 | 172 | } |
91d76f53 DG |
173 | |
174 | /* | |
284d8f55 DG |
175 | * Delete a traceable application structure from the global list. Never call |
176 | * this function outside of a call_rcu call. | |
91d76f53 | 177 | */ |
8b366481 DG |
178 | static |
179 | void delete_ust_app(struct ust_app *app) | |
91d76f53 | 180 | { |
8b366481 | 181 | int ret, sock; |
f6a9efaa DG |
182 | struct cds_lfht_node *node; |
183 | struct cds_lfht_iter iter; | |
284d8f55 | 184 | struct ust_app_session *ua_sess; |
44d3bd01 | 185 | |
f6a9efaa | 186 | rcu_read_lock(); |
44d3bd01 | 187 | |
f6a9efaa DG |
188 | /* Remove from key hash table */ |
189 | node = hashtable_lookup(ust_app_sock_key_map, | |
284d8f55 | 190 | (void *) ((unsigned long) app->key.sock), sizeof(void *), &iter); |
f6a9efaa | 191 | if (node == NULL) { |
284d8f55 DG |
192 | /* Not suppose to happen */ |
193 | ERR("UST app key %d not found in key hash table", app->key.sock); | |
d80a6244 | 194 | goto end; |
284d8f55 DG |
195 | } |
196 | ||
197 | ret = hashtable_del(ust_app_sock_key_map, &iter); | |
198 | if (ret) { | |
199 | ERR("UST app unable to delete app sock %d from key hash table", | |
200 | app->key.sock); | |
f6a9efaa | 201 | } else { |
284d8f55 DG |
202 | DBG2("UST app pair sock %d key %d deleted", |
203 | app->key.sock, app->key.pid); | |
f6a9efaa DG |
204 | } |
205 | ||
d80a6244 DG |
206 | /* Socket is already closed at this point */ |
207 | ||
208 | /* Delete ust app sessions info */ | |
6414a713 MD |
209 | sock = app->key.sock; |
210 | app->key.sock = -1; | |
d80a6244 | 211 | |
8b366481 | 212 | /* Wipe sessions */ |
284d8f55 | 213 | cds_lfht_for_each_entry(app->sessions, &iter, ua_sess, node) { |
525b0740 MD |
214 | ret = hashtable_del(app->sessions, &iter); |
215 | assert(!ret); | |
284d8f55 | 216 | delete_ust_app_session(app->key.sock, ua_sess); |
d80a6244 | 217 | } |
284d8f55 | 218 | ret = hashtable_destroy(app->sessions); |
8b366481 | 219 | assert(!ret); |
d80a6244 | 220 | |
6414a713 MD |
221 | /* |
222 | * Wait until we have removed the key from the sock hash table | |
223 | * before closing this socket, otherwise an application could | |
224 | * re-use the socket ID and race with the teardown, using the | |
225 | * same hash table entry. | |
226 | */ | |
227 | close(sock); | |
d80a6244 | 228 | |
284d8f55 DG |
229 | DBG2("UST app pid %d deleted", app->key.pid); |
230 | free(app); | |
d80a6244 | 231 | end: |
f6a9efaa | 232 | rcu_read_unlock(); |
099e26bd DG |
233 | } |
234 | ||
235 | /* | |
f6a9efaa | 236 | * URCU intermediate call to delete an UST app. |
099e26bd | 237 | */ |
8b366481 DG |
238 | static |
239 | void delete_ust_app_rcu(struct rcu_head *head) | |
099e26bd | 240 | { |
f6a9efaa DG |
241 | struct cds_lfht_node *node = |
242 | caa_container_of(head, struct cds_lfht_node, head); | |
243 | struct ust_app *app = | |
244 | caa_container_of(node, struct ust_app, node); | |
245 | ||
246 | delete_ust_app(app); | |
099e26bd DG |
247 | } |
248 | ||
8b366481 DG |
249 | /* |
250 | * Alloc new UST app session. | |
251 | */ | |
252 | static | |
253 | struct ust_app_session *alloc_ust_app_session(void) | |
254 | { | |
255 | struct ust_app_session *ua_sess; | |
256 | ||
257 | /* Init most of the default value by allocating and zeroing */ | |
258 | ua_sess = zmalloc(sizeof(struct ust_app_session)); | |
259 | if (ua_sess == NULL) { | |
260 | PERROR("malloc"); | |
261 | goto error; | |
262 | } | |
263 | ||
264 | ua_sess->handle = -1; | |
265 | ua_sess->channels = hashtable_new_str(0); | |
266 | ||
267 | return ua_sess; | |
268 | ||
269 | error: | |
270 | return NULL; | |
271 | } | |
272 | ||
273 | /* | |
274 | * Alloc new UST app channel. | |
275 | */ | |
276 | static | |
277 | struct ust_app_channel *alloc_ust_app_channel(char *name, | |
278 | struct lttng_ust_channel *attr) | |
279 | { | |
280 | struct ust_app_channel *ua_chan; | |
281 | ||
282 | /* Init most of the default value by allocating and zeroing */ | |
283 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); | |
284 | if (ua_chan == NULL) { | |
285 | PERROR("malloc"); | |
286 | goto error; | |
287 | } | |
288 | ||
289 | /* Setup channel name */ | |
290 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
291 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
292 | ||
293 | ua_chan->enabled = 1; | |
294 | ua_chan->handle = -1; | |
295 | ua_chan->ctx = hashtable_new(0); | |
296 | ua_chan->events = hashtable_new_str(0); | |
297 | hashtable_node_init(&ua_chan->node, (void *) ua_chan->name, | |
298 | strlen(ua_chan->name)); | |
299 | ||
300 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); | |
301 | ||
302 | /* Copy attributes */ | |
303 | if (attr) { | |
304 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
305 | } | |
306 | ||
307 | DBG3("UST app channel %s allocated", ua_chan->name); | |
308 | ||
309 | return ua_chan; | |
310 | ||
311 | error: | |
312 | return NULL; | |
313 | } | |
314 | ||
315 | /* | |
316 | * Alloc new UST app event. | |
317 | */ | |
318 | static | |
319 | struct ust_app_event *alloc_ust_app_event(char *name, | |
320 | struct lttng_ust_event *attr) | |
321 | { | |
322 | struct ust_app_event *ua_event; | |
323 | ||
324 | /* Init most of the default value by allocating and zeroing */ | |
325 | ua_event = zmalloc(sizeof(struct ust_app_event)); | |
326 | if (ua_event == NULL) { | |
327 | PERROR("malloc"); | |
328 | goto error; | |
329 | } | |
330 | ||
331 | ua_event->enabled = 1; | |
332 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
333 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
334 | ua_event->ctx = hashtable_new(0); | |
335 | hashtable_node_init(&ua_event->node, (void *) ua_event->name, | |
336 | strlen(ua_event->name)); | |
337 | ||
338 | /* Copy attributes */ | |
339 | if (attr) { | |
340 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
341 | } | |
342 | ||
343 | DBG3("UST app event %s allocated", ua_event->name); | |
344 | ||
345 | return ua_event; | |
346 | ||
347 | error: | |
348 | return NULL; | |
349 | } | |
350 | ||
351 | /* | |
352 | * Alloc new UST app context. | |
353 | */ | |
354 | static | |
355 | struct ust_app_ctx *alloc_ust_app_ctx(struct lttng_ust_context *uctx) | |
356 | { | |
357 | struct ust_app_ctx *ua_ctx; | |
358 | ||
359 | ua_ctx = zmalloc(sizeof(struct ust_app_ctx)); | |
360 | if (ua_ctx == NULL) { | |
361 | goto error; | |
362 | } | |
363 | ||
364 | if (uctx) { | |
365 | memcpy(&ua_ctx->ctx, uctx, sizeof(ua_ctx->ctx)); | |
366 | } | |
367 | ||
368 | DBG3("UST app context %d allocated", ua_ctx->ctx.ctx); | |
369 | ||
370 | error: | |
371 | return ua_ctx; | |
372 | } | |
373 | ||
099e26bd | 374 | /* |
421cb601 DG |
375 | * Find an ust_app using the sock and return it. RCU read side lock must be |
376 | * held before calling this helper function. | |
099e26bd | 377 | */ |
8b366481 DG |
378 | static |
379 | struct ust_app *find_app_by_sock(int sock) | |
099e26bd | 380 | { |
f6a9efaa DG |
381 | struct cds_lfht_node *node; |
382 | struct ust_app_key *key; | |
383 | struct cds_lfht_iter iter; | |
f6a9efaa | 384 | |
f6a9efaa DG |
385 | node = hashtable_lookup(ust_app_sock_key_map, |
386 | (void *)((unsigned long) sock), sizeof(void *), &iter); | |
387 | if (node == NULL) { | |
388 | DBG2("UST app find by sock %d key not found", sock); | |
f6a9efaa DG |
389 | goto error; |
390 | } | |
391 | ||
392 | key = caa_container_of(node, struct ust_app_key, node); | |
393 | ||
394 | node = hashtable_lookup(ust_app_ht, | |
395 | (void *)((unsigned long) key->pid), sizeof(void *), &iter); | |
396 | if (node == NULL) { | |
397 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
398 | goto error; |
399 | } | |
f6a9efaa DG |
400 | return caa_container_of(node, struct ust_app, node); |
401 | ||
402 | error: | |
403 | return NULL; | |
099e26bd DG |
404 | } |
405 | ||
55cc08a6 DG |
406 | /* |
407 | * Create the channel context on the tracer. | |
408 | */ | |
409 | static | |
410 | int create_ust_channel_context(struct ust_app_channel *ua_chan, | |
411 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
412 | { | |
413 | int ret; | |
414 | ||
415 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
416 | ua_chan->obj, &ua_ctx->obj); | |
417 | if (ret < 0) { | |
418 | goto error; | |
419 | } | |
420 | ||
421 | ua_ctx->handle = ua_ctx->obj->handle; | |
422 | ||
423 | DBG2("UST app context added to channel %s successfully", ua_chan->name); | |
424 | ||
425 | error: | |
426 | return ret; | |
427 | } | |
428 | ||
429 | /* | |
430 | * Create the event context on the tracer. | |
431 | */ | |
432 | static | |
433 | int create_ust_event_context(struct ust_app_event *ua_event, | |
434 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
435 | { | |
436 | int ret; | |
437 | ||
438 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
439 | ua_event->obj, &ua_ctx->obj); | |
440 | if (ret < 0) { | |
441 | goto error; | |
442 | } | |
443 | ||
444 | ua_ctx->handle = ua_ctx->obj->handle; | |
445 | ||
446 | DBG2("UST app context added to event %s successfully", ua_event->name); | |
447 | ||
448 | error: | |
449 | return ret; | |
450 | } | |
451 | ||
9730260e DG |
452 | /* |
453 | * Disable the specified event on to UST tracer for the UST session. | |
454 | */ | |
455 | static int disable_ust_event(struct ust_app *app, | |
456 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
457 | { | |
458 | int ret; | |
459 | ||
460 | ret = ustctl_disable(app->key.sock, ua_event->obj); | |
461 | if (ret < 0) { | |
462 | ERR("UST app event %s disable failed for app (pid: %d) " | |
463 | "and session handle %d with ret %d", | |
464 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
465 | goto error; | |
466 | } | |
467 | ||
468 | DBG2("UST app event %s disabled successfully for app (pid: %d)", | |
469 | ua_event->attr.name, app->key.pid); | |
470 | ||
471 | error: | |
472 | return ret; | |
473 | } | |
474 | ||
78f0bacd DG |
475 | /* |
476 | * Disable the specified channel on to UST tracer for the UST session. | |
477 | */ | |
478 | static int disable_ust_channel(struct ust_app *app, | |
479 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
480 | { | |
481 | int ret; | |
482 | ||
483 | ret = ustctl_disable(app->key.sock, ua_chan->obj); | |
484 | if (ret < 0) { | |
485 | ERR("UST app channel %s disable failed for app (pid: %d) " | |
486 | "and session handle %d with ret %d", | |
487 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
488 | goto error; | |
489 | } | |
490 | ||
78f0bacd DG |
491 | DBG2("UST app channel %s disabled successfully for app (pid: %d)", |
492 | ua_chan->name, app->key.pid); | |
493 | ||
494 | error: | |
495 | return ret; | |
496 | } | |
497 | ||
498 | /* | |
499 | * Enable the specified channel on to UST tracer for the UST session. | |
500 | */ | |
501 | static int enable_ust_channel(struct ust_app *app, | |
502 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
503 | { | |
504 | int ret; | |
505 | ||
506 | ret = ustctl_enable(app->key.sock, ua_chan->obj); | |
507 | if (ret < 0) { | |
508 | ERR("UST app channel %s enable failed for app (pid: %d) " | |
509 | "and session handle %d with ret %d", | |
510 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
511 | goto error; | |
512 | } | |
513 | ||
514 | ua_chan->enabled = 1; | |
515 | ||
516 | DBG2("UST app channel %s enabled successfully for app (pid: %d)", | |
517 | ua_chan->name, app->key.pid); | |
518 | ||
519 | error: | |
520 | return ret; | |
521 | } | |
522 | ||
edb67388 DG |
523 | /* |
524 | * Enable the specified event on to UST tracer for the UST session. | |
525 | */ | |
526 | static int enable_ust_event(struct ust_app *app, | |
527 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
528 | { | |
529 | int ret; | |
530 | ||
531 | ret = ustctl_enable(app->key.sock, ua_event->obj); | |
532 | if (ret < 0) { | |
533 | ERR("UST app event %s enable failed for app (pid: %d) " | |
534 | "and session handle %d with ret %d", | |
535 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
536 | goto error; | |
537 | } | |
538 | ||
539 | DBG2("UST app event %s enabled successfully for app (pid: %d)", | |
540 | ua_event->attr.name, app->key.pid); | |
541 | ||
542 | error: | |
543 | return ret; | |
544 | } | |
545 | ||
099e26bd | 546 | /* |
5b4a0ec0 | 547 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 548 | */ |
5b4a0ec0 DG |
549 | static int open_ust_metadata(struct ust_app *app, |
550 | struct ust_app_session *ua_sess) | |
0177d773 | 551 | { |
5b4a0ec0 DG |
552 | int ret; |
553 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 554 | |
5b4a0ec0 DG |
555 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
556 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
557 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
558 | uattr.switch_timer_interval = | |
559 | ua_sess->metadata->attr.switch_timer_interval; | |
560 | uattr.read_timer_interval = | |
561 | ua_sess->metadata->attr.read_timer_interval; | |
562 | uattr.output = ua_sess->metadata->attr.output; | |
563 | ||
564 | /* UST tracer metadata creation */ | |
565 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
566 | &ua_sess->metadata->obj); | |
567 | if (ret < 0) { | |
568 | ERR("UST app open metadata failed for app pid:%d", | |
569 | app->key.pid); | |
f6a9efaa | 570 | goto error; |
0177d773 | 571 | } |
f6a9efaa | 572 | |
6d3686da DG |
573 | ua_sess->metadata->handle = ua_sess->metadata->obj->handle; |
574 | ||
f6a9efaa | 575 | error: |
5b4a0ec0 | 576 | return ret; |
91d76f53 DG |
577 | } |
578 | ||
579 | /* | |
5b4a0ec0 | 580 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 581 | */ |
5b4a0ec0 DG |
582 | static int create_ust_stream(struct ust_app *app, |
583 | struct ust_app_session *ua_sess) | |
91d76f53 | 584 | { |
5b4a0ec0 | 585 | int ret; |
421cb601 | 586 | |
5b4a0ec0 DG |
587 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, |
588 | &ua_sess->metadata->stream_obj); | |
589 | if (ret < 0) { | |
590 | ERR("UST create metadata stream failed"); | |
421cb601 | 591 | goto error; |
91d76f53 | 592 | } |
421cb601 | 593 | |
421cb601 | 594 | error: |
5b4a0ec0 | 595 | return ret; |
91d76f53 DG |
596 | } |
597 | ||
b551a063 | 598 | /* |
5b4a0ec0 | 599 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 600 | */ |
5b4a0ec0 DG |
601 | static int create_ust_channel(struct ust_app *app, |
602 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 603 | { |
5b4a0ec0 | 604 | int ret; |
b551a063 | 605 | |
5b4a0ec0 DG |
606 | /* TODO: remove cast and use lttng-ust-abi.h */ |
607 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
608 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); | |
609 | if (ret < 0) { | |
610 | DBG("Error creating channel %s for app (pid: %d, sock: %d) " | |
611 | "and session handle %d with ret %d", | |
612 | ua_chan->name, app->key.pid, app->key.sock, | |
613 | ua_sess->handle, ret); | |
b551a063 DG |
614 | goto error; |
615 | } | |
616 | ||
5b4a0ec0 DG |
617 | ua_chan->handle = ua_chan->obj->handle; |
618 | ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; | |
619 | ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; | |
620 | ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; | |
b551a063 | 621 | |
5b4a0ec0 DG |
622 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
623 | ua_chan->name, app->key.pid, app->key.sock); | |
b551a063 | 624 | |
8535a6d9 DG |
625 | /* If channel is not enabled, disable it on the tracer */ |
626 | if (!ua_chan->enabled) { | |
627 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
628 | if (ret < 0) { | |
629 | goto error; | |
630 | } | |
631 | } | |
632 | ||
b551a063 DG |
633 | error: |
634 | return ret; | |
635 | } | |
636 | ||
91d76f53 | 637 | /* |
5b4a0ec0 | 638 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 639 | */ |
edb67388 DG |
640 | static |
641 | int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess, | |
642 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event) | |
91d76f53 | 643 | { |
5b4a0ec0 | 644 | int ret = 0; |
284d8f55 | 645 | |
5b4a0ec0 DG |
646 | /* Create UST event on tracer */ |
647 | ret = ustctl_create_event(app->key.sock, &ua_event->attr, ua_chan->obj, | |
648 | &ua_event->obj); | |
649 | if (ret < 0) { | |
650 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
651 | ua_event->attr.name, app->key.pid, ret); | |
652 | goto error; | |
91d76f53 | 653 | } |
f6a9efaa | 654 | |
5b4a0ec0 | 655 | ua_event->handle = ua_event->obj->handle; |
284d8f55 | 656 | |
5b4a0ec0 DG |
657 | DBG2("UST app event %s created successfully for pid:%d", |
658 | ua_event->attr.name, app->key.pid); | |
f6a9efaa | 659 | |
8535a6d9 DG |
660 | /* If event not enabled, disable it on the tracer */ |
661 | if (!ua_event->enabled) { | |
662 | ret = disable_ust_event(app, ua_sess, ua_event); | |
663 | if (ret < 0) { | |
664 | goto error; | |
665 | } | |
666 | } | |
667 | ||
5b4a0ec0 DG |
668 | error: |
669 | return ret; | |
91d76f53 | 670 | } |
48842b30 | 671 | |
5b4a0ec0 DG |
672 | /* |
673 | * Copy data between an UST app event and a LTT event. | |
674 | */ | |
421cb601 | 675 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
676 | struct ltt_ust_event *uevent) |
677 | { | |
55cc08a6 DG |
678 | struct cds_lfht_iter iter; |
679 | struct ltt_ust_context *uctx; | |
680 | struct ust_app_ctx *ua_ctx; | |
681 | ||
48842b30 DG |
682 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); |
683 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
684 | ||
5b4a0ec0 DG |
685 | /* Copy event attributes */ |
686 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
687 | ||
55cc08a6 DG |
688 | cds_lfht_for_each_entry(uevent->ctx, &iter, uctx, node) { |
689 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); | |
690 | if (ua_ctx == NULL) { | |
691 | continue; | |
692 | } | |
693 | hashtable_node_init(&ua_ctx->node, | |
694 | (void *)((unsigned long) ua_ctx->ctx.ctx), sizeof(void *)); | |
695 | hashtable_add_unique(ua_event->ctx, &ua_ctx->node); | |
696 | } | |
48842b30 DG |
697 | } |
698 | ||
5b4a0ec0 DG |
699 | /* |
700 | * Copy data between an UST app channel and a LTT channel. | |
701 | */ | |
421cb601 | 702 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
703 | struct ltt_ust_channel *uchan) |
704 | { | |
705 | struct cds_lfht_iter iter; | |
5b4a0ec0 | 706 | struct cds_lfht_node *ua_event_node; |
48842b30 | 707 | struct ltt_ust_event *uevent; |
55cc08a6 | 708 | struct ltt_ust_context *uctx; |
48842b30 | 709 | struct ust_app_event *ua_event; |
55cc08a6 | 710 | struct ust_app_ctx *ua_ctx; |
48842b30 | 711 | |
421cb601 | 712 | DBG2("Shadow copy of UST app channel %s", ua_chan->name); |
48842b30 DG |
713 | |
714 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
715 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
716 | /* Copy event attributes */ |
717 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 | 718 | |
55cc08a6 DG |
719 | cds_lfht_for_each_entry(uchan->ctx, &iter, uctx, node) { |
720 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); | |
721 | if (ua_ctx == NULL) { | |
722 | continue; | |
723 | } | |
724 | hashtable_node_init(&ua_ctx->node, | |
725 | (void *)((unsigned long) ua_ctx->ctx.ctx), sizeof(void *)); | |
726 | hashtable_add_unique(ua_chan->ctx, &ua_ctx->node); | |
727 | } | |
48842b30 | 728 | |
421cb601 | 729 | /* Copy all events from ltt ust channel to ust app channel */ |
5b4a0ec0 | 730 | cds_lfht_for_each_entry(uchan->events, &iter, uevent, node) { |
ba767faf MD |
731 | struct cds_lfht_iter uiter; |
732 | ||
48842b30 | 733 | ua_event_node = hashtable_lookup(ua_chan->events, |
ba767faf MD |
734 | (void *) uevent->attr.name, strlen(uevent->attr.name), |
735 | &uiter); | |
48842b30 | 736 | if (ua_event_node == NULL) { |
421cb601 | 737 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 738 | uevent->attr.name); |
284d8f55 | 739 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 740 | if (ua_event == NULL) { |
5b4a0ec0 | 741 | continue; |
48842b30 | 742 | } |
421cb601 | 743 | shadow_copy_event(ua_event, uevent); |
48842b30 | 744 | hashtable_add_unique(ua_chan->events, &ua_event->node); |
48842b30 | 745 | } |
48842b30 DG |
746 | } |
747 | ||
421cb601 | 748 | DBG3("Shadow copy channel done"); |
48842b30 DG |
749 | } |
750 | ||
5b4a0ec0 DG |
751 | /* |
752 | * Copy data between a UST app session and a regular LTT session. | |
753 | */ | |
421cb601 | 754 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
477d7741 MD |
755 | struct ltt_ust_session *usess, |
756 | struct ust_app *app) | |
48842b30 | 757 | { |
5b4a0ec0 | 758 | struct cds_lfht_node *ua_chan_node; |
48842b30 DG |
759 | struct cds_lfht_iter iter; |
760 | struct ltt_ust_channel *uchan; | |
761 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
762 | time_t rawtime; |
763 | struct tm *timeinfo; | |
764 | char datetime[16]; | |
765 | int ret; | |
766 | ||
767 | /* Get date and time for unique app path */ | |
768 | time(&rawtime); | |
769 | timeinfo = localtime(&rawtime); | |
770 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 771 | |
421cb601 | 772 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 | 773 | |
a991f516 | 774 | ua_sess->id = usess->id; |
6df2e2c9 MD |
775 | ua_sess->uid = usess->uid; |
776 | ua_sess->gid = usess->gid; | |
48842b30 | 777 | |
477d7741 MD |
778 | ret = snprintf(ua_sess->path, PATH_MAX, |
779 | "%s/%s-%d-%s", | |
780 | usess->pathname, app->name, app->key.pid, | |
781 | datetime); | |
782 | if (ret < 0) { | |
783 | PERROR("asprintf UST shadow copy session"); | |
784 | /* TODO: We cannot return an error from here.. */ | |
785 | assert(0); | |
786 | } | |
787 | ||
48842b30 DG |
788 | /* TODO: support all UST domain */ |
789 | ||
790 | /* Iterate over all channels in global domain. */ | |
5b4a0ec0 DG |
791 | cds_lfht_for_each_entry(usess->domain_global.channels, &iter, |
792 | uchan, node) { | |
ba767faf MD |
793 | struct cds_lfht_iter uiter; |
794 | ||
48842b30 | 795 | ua_chan_node = hashtable_lookup(ua_sess->channels, |
ba767faf MD |
796 | (void *)uchan->name, strlen(uchan->name), |
797 | &uiter); | |
5b4a0ec0 DG |
798 | if (ua_chan_node != NULL) { |
799 | continue; | |
800 | } | |
421cb601 | 801 | |
5b4a0ec0 DG |
802 | DBG2("Channel %s not found on shadow session copy, creating it", |
803 | uchan->name); | |
804 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
805 | if (ua_chan == NULL) { | |
806 | /* malloc failed... continuing */ | |
807 | continue; | |
48842b30 DG |
808 | } |
809 | ||
5b4a0ec0 DG |
810 | shadow_copy_channel(ua_chan, uchan); |
811 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
48842b30 DG |
812 | } |
813 | } | |
814 | ||
78f0bacd DG |
815 | /* |
816 | * Lookup sesison wrapper. | |
817 | */ | |
84cd17c6 MD |
818 | static |
819 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
820 | struct ust_app *app, struct cds_lfht_iter *iter) | |
821 | { | |
822 | /* Get right UST app session from app */ | |
823 | (void) hashtable_lookup(app->sessions, | |
a991f516 | 824 | (void *) ((unsigned long) usess->id), sizeof(void *), |
84cd17c6 MD |
825 | iter); |
826 | } | |
827 | ||
421cb601 DG |
828 | /* |
829 | * Return ust app session from the app session hashtable using the UST session | |
a991f516 | 830 | * id. |
421cb601 | 831 | */ |
48842b30 DG |
832 | static struct ust_app_session *lookup_session_by_app( |
833 | struct ltt_ust_session *usess, struct ust_app *app) | |
834 | { | |
835 | struct cds_lfht_iter iter; | |
836 | struct cds_lfht_node *node; | |
837 | ||
84cd17c6 MD |
838 | __lookup_session_by_app(usess, app, &iter); |
839 | node = hashtable_iter_get_node(&iter); | |
48842b30 DG |
840 | if (node == NULL) { |
841 | goto error; | |
842 | } | |
843 | ||
844 | return caa_container_of(node, struct ust_app_session, node); | |
845 | ||
846 | error: | |
847 | return NULL; | |
848 | } | |
849 | ||
421cb601 DG |
850 | /* |
851 | * Create a UST session onto the tracer of app and add it the session | |
852 | * hashtable. | |
853 | * | |
854 | * Return ust app session or NULL on error. | |
855 | */ | |
856 | static struct ust_app_session *create_ust_app_session( | |
857 | struct ltt_ust_session *usess, struct ust_app *app) | |
858 | { | |
859 | int ret; | |
860 | struct ust_app_session *ua_sess; | |
861 | ||
862 | ua_sess = lookup_session_by_app(usess, app); | |
863 | if (ua_sess == NULL) { | |
a991f516 MD |
864 | DBG2("UST app pid: %d session id %d not found, creating it", |
865 | app->key.pid, usess->id); | |
421cb601 DG |
866 | ua_sess = alloc_ust_app_session(); |
867 | if (ua_sess == NULL) { | |
868 | /* Only malloc can failed so something is really wrong */ | |
869 | goto error; | |
870 | } | |
477d7741 | 871 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
872 | } |
873 | ||
874 | if (ua_sess->handle == -1) { | |
875 | ret = ustctl_create_session(app->key.sock); | |
876 | if (ret < 0) { | |
877 | ERR("Error creating session for app pid %d, sock %d", | |
878 | app->key.pid, app->key.sock); | |
879 | /* TODO: free() ua_sess */ | |
880 | goto error; | |
881 | } | |
882 | ||
883 | DBG2("UST app ustctl create session handle %d", ret); | |
884 | ua_sess->handle = ret; | |
885 | ||
886 | /* Add ust app session to app's HT */ | |
887 | hashtable_node_init(&ua_sess->node, | |
a991f516 | 888 | (void *)((unsigned long) ua_sess->id), sizeof(void *)); |
421cb601 DG |
889 | hashtable_add_unique(app->sessions, &ua_sess->node); |
890 | ||
891 | DBG2("UST app session created successfully with handle %d", ret); | |
892 | } | |
893 | ||
894 | return ua_sess; | |
895 | ||
896 | error: | |
897 | return NULL; | |
898 | } | |
899 | ||
55cc08a6 DG |
900 | /* |
901 | * Create a context for the channel on the tracer. | |
902 | */ | |
903 | static | |
904 | int create_ust_app_channel_context(struct ust_app_session *ua_sess, | |
905 | struct ust_app_channel *ua_chan, struct lttng_ust_context *uctx, | |
906 | struct ust_app *app) | |
907 | { | |
908 | int ret = 0; | |
909 | struct cds_lfht_iter iter; | |
910 | struct cds_lfht_node *node; | |
911 | struct ust_app_ctx *ua_ctx; | |
912 | ||
913 | DBG2("UST app adding context to channel %s", ua_chan->name); | |
914 | ||
915 | node = hashtable_lookup(ua_chan->ctx, (void *)((unsigned long)uctx->ctx), | |
916 | sizeof(void *), &iter); | |
917 | if (node != NULL) { | |
918 | ret = -EEXIST; | |
919 | goto error; | |
920 | } | |
921 | ||
922 | ua_ctx = alloc_ust_app_ctx(uctx); | |
923 | if (ua_ctx == NULL) { | |
924 | /* malloc failed */ | |
925 | ret = -1; | |
926 | goto error; | |
927 | } | |
928 | ||
929 | hashtable_node_init(&ua_ctx->node, | |
930 | (void *)((unsigned long) ua_ctx->ctx.ctx), sizeof(void *)); | |
931 | hashtable_add_unique(ua_chan->ctx, &ua_ctx->node); | |
932 | ||
933 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
934 | if (ret < 0) { | |
935 | goto error; | |
936 | } | |
937 | ||
938 | error: | |
939 | return ret; | |
940 | } | |
941 | ||
942 | /* | |
943 | * Create an UST context and enable it for the event on the tracer. | |
944 | */ | |
945 | static | |
946 | int create_ust_app_event_context(struct ust_app_session *ua_sess, | |
947 | struct ust_app_event *ua_event, struct lttng_ust_context *uctx, | |
948 | struct ust_app *app) | |
949 | { | |
950 | int ret = 0; | |
951 | struct cds_lfht_iter iter; | |
952 | struct cds_lfht_node *node; | |
953 | struct ust_app_ctx *ua_ctx; | |
954 | ||
955 | DBG2("UST app adding context to event %s", ua_event->name); | |
956 | ||
957 | node = hashtable_lookup(ua_event->ctx, (void *)((unsigned long)uctx->ctx), | |
958 | sizeof(void *), &iter); | |
959 | if (node != NULL) { | |
960 | ret = -EEXIST; | |
961 | goto error; | |
962 | } | |
963 | ||
964 | ua_ctx = alloc_ust_app_ctx(uctx); | |
965 | if (ua_ctx == NULL) { | |
966 | /* malloc failed */ | |
967 | ret = -1; | |
968 | goto error; | |
969 | } | |
970 | ||
971 | hashtable_node_init(&ua_ctx->node, | |
972 | (void *)((unsigned long) ua_ctx->ctx.ctx), sizeof(void *)); | |
973 | hashtable_add_unique(ua_event->ctx, &ua_ctx->node); | |
974 | ||
975 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
976 | if (ret < 0) { | |
977 | goto error; | |
978 | } | |
979 | ||
980 | error: | |
981 | return ret; | |
982 | } | |
983 | ||
edb67388 DG |
984 | /* |
985 | * Enable on the tracer side a ust app event for the session and channel. | |
986 | */ | |
987 | static | |
988 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 989 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
990 | { |
991 | int ret; | |
992 | ||
993 | ret = enable_ust_event(app, ua_sess, ua_event); | |
994 | if (ret < 0) { | |
995 | goto error; | |
996 | } | |
997 | ||
998 | ua_event->enabled = 1; | |
999 | ||
1000 | error: | |
1001 | return ret; | |
1002 | } | |
1003 | ||
9730260e DG |
1004 | /* |
1005 | * Disable on the tracer side a ust app event for the session and channel. | |
1006 | */ | |
1007 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
7f79d3a1 | 1008 | struct ust_app_event *ua_event, struct ust_app *app) |
9730260e DG |
1009 | { |
1010 | int ret; | |
1011 | ||
1012 | ret = disable_ust_event(app, ua_sess, ua_event); | |
1013 | if (ret < 0) { | |
1014 | goto error; | |
1015 | } | |
1016 | ||
1017 | ua_event->enabled = 0; | |
1018 | ||
1019 | error: | |
1020 | return ret; | |
1021 | } | |
1022 | ||
78f0bacd DG |
1023 | /* |
1024 | * Lookup ust app channel for session and disable it on the tracer side. | |
1025 | */ | |
8535a6d9 DG |
1026 | static |
1027 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
1028 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 1029 | { |
8535a6d9 | 1030 | int ret; |
78f0bacd DG |
1031 | |
1032 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
1033 | if (ret < 0) { | |
1034 | goto error; | |
1035 | } | |
1036 | ||
8535a6d9 DG |
1037 | ua_chan->enabled = 0; |
1038 | ||
78f0bacd DG |
1039 | error: |
1040 | return ret; | |
1041 | } | |
1042 | ||
1043 | /* | |
1044 | * Lookup ust app channel for session and enable it on the tracer side. | |
1045 | */ | |
1046 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
1047 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
1048 | { | |
1049 | int ret = 0; | |
1050 | struct cds_lfht_iter iter; | |
1051 | struct cds_lfht_node *ua_chan_node; | |
1052 | struct ust_app_channel *ua_chan; | |
1053 | ||
1054 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
1055 | (void *)uchan->name, strlen(uchan->name), &iter); | |
1056 | if (ua_chan_node == NULL) { | |
a991f516 MD |
1057 | DBG2("Unable to find channel %s in ust session id %u", |
1058 | uchan->name, ua_sess->id); | |
78f0bacd DG |
1059 | goto error; |
1060 | } | |
1061 | ||
1062 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1063 | ||
1064 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
1065 | if (ret < 0) { | |
1066 | goto error; | |
1067 | } | |
1068 | ||
1069 | error: | |
1070 | return ret; | |
1071 | } | |
1072 | ||
284d8f55 | 1073 | /* |
5b4a0ec0 | 1074 | * Create UST app channel and create it on the tracer. |
284d8f55 | 1075 | */ |
5b4a0ec0 DG |
1076 | static struct ust_app_channel *create_ust_app_channel( |
1077 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
1078 | struct ust_app *app) | |
1079 | { | |
1080 | int ret = 0; | |
1081 | struct cds_lfht_iter iter; | |
1082 | struct cds_lfht_node *ua_chan_node; | |
1083 | struct ust_app_channel *ua_chan; | |
1084 | ||
1085 | /* Lookup channel in the ust app session */ | |
1086 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
1087 | (void *)uchan->name, strlen(uchan->name), &iter); | |
1088 | if (ua_chan_node == NULL) { | |
a991f516 MD |
1089 | DBG2("Unable to find channel %s in ust session id %u", |
1090 | uchan->name, ua_sess->id); | |
5b4a0ec0 DG |
1091 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); |
1092 | if (ua_chan == NULL) { | |
1093 | goto error; | |
1094 | } | |
1095 | shadow_copy_channel(ua_chan, uchan); | |
1096 | ||
1097 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
1098 | } else { | |
1099 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1100 | } | |
1101 | ||
1102 | ret = create_ust_channel(app, ua_sess, ua_chan); | |
1103 | if (ret < 0) { | |
1104 | goto error; | |
1105 | } | |
1106 | ||
1107 | return ua_chan; | |
1108 | ||
1109 | error: | |
1110 | return NULL; | |
1111 | } | |
1112 | ||
1113 | /* | |
1114 | * Create UST app event and create it on the tracer side. | |
1115 | */ | |
edb67388 DG |
1116 | static |
1117 | int create_ust_app_event(struct ust_app_session *ua_sess, | |
1118 | struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent, | |
1119 | struct ust_app *app) | |
284d8f55 | 1120 | { |
edb67388 | 1121 | int ret = 0; |
5b4a0ec0 DG |
1122 | struct cds_lfht_iter iter; |
1123 | struct cds_lfht_node *ua_event_node; | |
1124 | struct ust_app_event *ua_event; | |
284d8f55 | 1125 | |
5b4a0ec0 DG |
1126 | /* Get event node */ |
1127 | ua_event_node = hashtable_lookup(ua_chan->events, | |
1128 | (void *)uevent->attr.name, strlen(uevent->attr.name), &iter); | |
edb67388 DG |
1129 | if (ua_event_node != NULL) { |
1130 | ERR("UST app event %s already exist. Stopping creation.", | |
1131 | uevent->attr.name); | |
1132 | goto end; | |
1133 | } | |
5b4a0ec0 | 1134 | |
edb67388 DG |
1135 | /* Does not exist so create one */ |
1136 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
1137 | if (ua_event == NULL) { | |
1138 | /* Only malloc can failed so something is really wrong */ | |
1139 | ret = -ENOMEM; | |
1140 | goto error; | |
5b4a0ec0 | 1141 | } |
edb67388 | 1142 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 1143 | |
edb67388 | 1144 | /* Create it on the tracer side */ |
5b4a0ec0 | 1145 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 1146 | if (ret < 0) { |
e5abf1bf | 1147 | rcu_read_lock(); |
edb67388 | 1148 | delete_ust_app_event(app->key.sock, ua_event); |
e5abf1bf | 1149 | rcu_read_unlock(); |
284d8f55 DG |
1150 | goto error; |
1151 | } | |
1152 | ||
8535a6d9 DG |
1153 | ua_event->enabled = 1; |
1154 | ||
edb67388 | 1155 | hashtable_add_unique(ua_chan->events, &ua_event->node); |
284d8f55 | 1156 | |
7f79d3a1 DG |
1157 | DBG2("UST app create event %s for PID %d completed", |
1158 | ua_event->name, app->key.pid); | |
1159 | ||
edb67388 | 1160 | end: |
5b4a0ec0 | 1161 | error: |
edb67388 | 1162 | return ret; |
5b4a0ec0 DG |
1163 | } |
1164 | ||
1165 | /* | |
1166 | * Create UST metadata and open it on the tracer side. | |
1167 | */ | |
1168 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
1169 | char *pathname, struct ust_app *app) | |
1170 | { | |
1171 | int ret = 0; | |
1172 | ||
1173 | if (ua_sess->metadata == NULL) { | |
1174 | /* Allocate UST metadata */ | |
1175 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
1176 | if (ua_sess->metadata == NULL) { | |
1177 | ERR("UST app session %d creating metadata failed", | |
1178 | ua_sess->handle); | |
1179 | goto error; | |
1180 | } | |
1181 | ||
1182 | ret = open_ust_metadata(app, ua_sess); | |
1183 | if (ret < 0) { | |
1184 | goto error; | |
1185 | } | |
1186 | ||
1187 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
1188 | } | |
1189 | ||
1190 | /* Open UST metadata stream */ | |
1191 | if (ua_sess->metadata->stream_obj == NULL) { | |
1192 | ret = create_ust_stream(app, ua_sess); | |
1193 | if (ret < 0) { | |
1194 | goto error; | |
1195 | } | |
1196 | ||
67f747d8 MD |
1197 | ret = mkdir_run_as(ua_sess->path, S_IRWXU | S_IRWXG, |
1198 | ua_sess->uid, ua_sess->gid); | |
5b4a0ec0 DG |
1199 | if (ret < 0) { |
1200 | PERROR("mkdir UST metadata"); | |
1201 | goto error; | |
1202 | } | |
1203 | ||
477d7741 MD |
1204 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
1205 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
1206 | if (ret < 0) { |
1207 | PERROR("asprintf UST create stream"); | |
1208 | goto error; | |
1209 | } | |
1210 | ||
1211 | DBG2("UST metadata stream object created for app pid %d", | |
1212 | app->key.pid); | |
1213 | } else { | |
1214 | ERR("Attempting to create stream without metadata opened"); | |
1215 | goto error; | |
1216 | } | |
1217 | ||
1218 | return 0; | |
1219 | ||
1220 | error: | |
1221 | return -1; | |
1222 | } | |
1223 | ||
1224 | /* | |
1225 | * Return pointer to traceable apps list. | |
1226 | */ | |
1227 | struct cds_lfht *ust_app_get_ht(void) | |
1228 | { | |
1229 | return ust_app_ht; | |
1230 | } | |
1231 | ||
1232 | /* | |
1233 | * Return ust app pointer or NULL if not found. | |
1234 | */ | |
1235 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
1236 | { | |
1237 | struct cds_lfht_node *node; | |
1238 | struct cds_lfht_iter iter; | |
1239 | ||
1240 | rcu_read_lock(); | |
1241 | node = hashtable_lookup(ust_app_ht, | |
1242 | (void *)((unsigned long) pid), sizeof(void *), &iter); | |
1243 | if (node == NULL) { | |
1244 | DBG2("UST app no found with pid %d", pid); | |
1245 | goto error; | |
1246 | } | |
1247 | rcu_read_unlock(); | |
1248 | ||
1249 | DBG2("Found UST app by pid %d", pid); | |
1250 | ||
1251 | return caa_container_of(node, struct ust_app, node); | |
1252 | ||
1253 | error: | |
1254 | rcu_read_unlock(); | |
1255 | return NULL; | |
1256 | } | |
1257 | ||
1258 | /* | |
1259 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
1260 | * add it to the global traceable app list. | |
1261 | * | |
0df502fd MD |
1262 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
1263 | * bitness is not supported. | |
5b4a0ec0 DG |
1264 | */ |
1265 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
1266 | { | |
1267 | struct ust_app *lta; | |
1268 | ||
7753dea8 MD |
1269 | if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL) |
1270 | || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) { | |
f943b0fb | 1271 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1272 | "%d-bit long, but no consumerd for this long size is available.\n", |
1273 | msg->name, msg->pid, msg->bits_per_long); | |
88ff5b7f | 1274 | close(sock); |
0df502fd MD |
1275 | return -EINVAL; |
1276 | } | |
5b4a0ec0 DG |
1277 | lta = zmalloc(sizeof(struct ust_app)); |
1278 | if (lta == NULL) { | |
1279 | PERROR("malloc"); | |
1280 | return -ENOMEM; | |
1281 | } | |
1282 | ||
1283 | lta->ppid = msg->ppid; | |
1284 | lta->uid = msg->uid; | |
1285 | lta->gid = msg->gid; | |
7753dea8 | 1286 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1287 | lta->v_major = msg->major; |
1288 | lta->v_minor = msg->minor; | |
1289 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1290 | lta->name[16] = '\0'; | |
1291 | lta->sessions = hashtable_new(0); | |
1292 | ||
1293 | /* Set key map */ | |
1294 | lta->key.pid = msg->pid; | |
1295 | hashtable_node_init(<a->node, (void *)((unsigned long)lta->key.pid), | |
1296 | sizeof(void *)); | |
1297 | lta->key.sock = sock; | |
1298 | hashtable_node_init(<a->key.node, (void *)((unsigned long)lta->key.sock), | |
1299 | sizeof(void *)); | |
1300 | ||
1301 | rcu_read_lock(); | |
1302 | hashtable_add_unique(ust_app_sock_key_map, <a->key.node); | |
1303 | hashtable_add_unique(ust_app_ht, <a->node); | |
1304 | rcu_read_unlock(); | |
1305 | ||
1306 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
1307 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, | |
1308 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
1309 | ||
1310 | return 0; | |
1311 | } | |
1312 | ||
1313 | /* | |
1314 | * Unregister app by removing it from the global traceable app list and freeing | |
1315 | * the data struct. | |
1316 | * | |
1317 | * The socket is already closed at this point so no close to sock. | |
1318 | */ | |
1319 | void ust_app_unregister(int sock) | |
1320 | { | |
1321 | struct ust_app *lta; | |
1322 | struct cds_lfht_node *node; | |
1323 | struct cds_lfht_iter iter; | |
525b0740 | 1324 | int ret; |
5b4a0ec0 DG |
1325 | |
1326 | rcu_read_lock(); | |
1327 | lta = find_app_by_sock(sock); | |
1328 | if (lta == NULL) { | |
1329 | ERR("Unregister app sock %d not found!", sock); | |
1330 | goto error; | |
1331 | } | |
1332 | ||
1333 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
1334 | ||
1335 | /* Get the node reference for a call_rcu */ | |
1336 | node = hashtable_lookup(ust_app_ht, | |
1337 | (void *)((unsigned long) lta->key.pid), sizeof(void *), &iter); | |
1338 | if (node == NULL) { | |
1339 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
1340 | goto error; | |
1341 | } | |
284d8f55 | 1342 | |
525b0740 MD |
1343 | ret = hashtable_del(ust_app_ht, &iter); |
1344 | assert(!ret); | |
5b4a0ec0 | 1345 | call_rcu(&node->head, delete_ust_app_rcu); |
284d8f55 | 1346 | error: |
5b4a0ec0 DG |
1347 | rcu_read_unlock(); |
1348 | return; | |
284d8f55 DG |
1349 | } |
1350 | ||
1351 | /* | |
5b4a0ec0 | 1352 | * Return traceable_app_count |
284d8f55 | 1353 | */ |
5b4a0ec0 | 1354 | unsigned long ust_app_list_count(void) |
284d8f55 | 1355 | { |
5b4a0ec0 | 1356 | unsigned long count; |
284d8f55 | 1357 | |
5b4a0ec0 DG |
1358 | rcu_read_lock(); |
1359 | count = hashtable_get_count(ust_app_ht); | |
1360 | rcu_read_unlock(); | |
284d8f55 | 1361 | |
5b4a0ec0 | 1362 | return count; |
284d8f55 DG |
1363 | } |
1364 | ||
5b4a0ec0 DG |
1365 | /* |
1366 | * Fill events array with all events name of all registered apps. | |
1367 | */ | |
1368 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1369 | { |
5b4a0ec0 DG |
1370 | int ret, handle; |
1371 | size_t nbmem, count = 0; | |
421cb601 | 1372 | struct cds_lfht_iter iter; |
5b4a0ec0 DG |
1373 | struct ust_app *app; |
1374 | struct lttng_event *tmp; | |
421cb601 | 1375 | |
5b4a0ec0 DG |
1376 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1377 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1378 | if (tmp == NULL) { | |
1379 | PERROR("zmalloc ust app events"); | |
1380 | ret = -ENOMEM; | |
421cb601 DG |
1381 | goto error; |
1382 | } | |
1383 | ||
5b4a0ec0 | 1384 | rcu_read_lock(); |
421cb601 | 1385 | |
5b4a0ec0 | 1386 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
90eaa0d2 | 1387 | struct lttng_ust_tracepoint_iter uiter; |
ac3bd9c0 | 1388 | |
5b4a0ec0 DG |
1389 | handle = ustctl_tracepoint_list(app->key.sock); |
1390 | if (handle < 0) { | |
1391 | ERR("UST app list events getting handle failed for app pid %d", | |
1392 | app->key.pid); | |
1393 | continue; | |
1394 | } | |
421cb601 | 1395 | |
5b4a0ec0 | 1396 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, |
90eaa0d2 | 1397 | &uiter)) != -ENOENT) { |
815564d8 MD |
1398 | if (count >= nbmem) { |
1399 | DBG2("Reallocating event list from %zu to %zu entries", nbmem, | |
1400 | 2 * nbmem); | |
1401 | nbmem *= 2; | |
2f221590 | 1402 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event)); |
5b4a0ec0 DG |
1403 | if (tmp == NULL) { |
1404 | PERROR("realloc ust app events"); | |
1405 | ret = -ENOMEM; | |
1406 | goto rcu_error; | |
1407 | } | |
1408 | } | |
90eaa0d2 DG |
1409 | memcpy(tmp[count].name, uiter.name, LTTNG_UST_SYM_NAME_LEN); |
1410 | memcpy(tmp[count].loglevel, uiter.loglevel, LTTNG_UST_SYM_NAME_LEN); | |
1411 | tmp[count].loglevel_value = uiter.loglevel_value; | |
5b4a0ec0 DG |
1412 | tmp[count].type = LTTNG_UST_TRACEPOINT; |
1413 | tmp[count].pid = app->key.pid; | |
1414 | tmp[count].enabled = -1; | |
1415 | count++; | |
421cb601 | 1416 | } |
421cb601 DG |
1417 | } |
1418 | ||
5b4a0ec0 DG |
1419 | ret = count; |
1420 | *events = tmp; | |
421cb601 | 1421 | |
5b4a0ec0 | 1422 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1423 | |
5b4a0ec0 DG |
1424 | rcu_error: |
1425 | rcu_read_unlock(); | |
421cb601 | 1426 | error: |
5b4a0ec0 | 1427 | return ret; |
421cb601 DG |
1428 | } |
1429 | ||
5b4a0ec0 DG |
1430 | /* |
1431 | * Free and clean all traceable apps of the global list. | |
1432 | */ | |
1433 | void ust_app_clean_list(void) | |
421cb601 | 1434 | { |
5b4a0ec0 | 1435 | int ret; |
5b4a0ec0 DG |
1436 | struct cds_lfht_iter iter; |
1437 | struct ust_app *app; | |
421cb601 | 1438 | |
5b4a0ec0 | 1439 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1440 | |
5b4a0ec0 | 1441 | rcu_read_lock(); |
421cb601 | 1442 | |
778ca3dd | 1443 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
5b4a0ec0 | 1444 | ret = hashtable_del(ust_app_ht, &iter); |
525b0740 | 1445 | assert(!ret); |
0d5d001d | 1446 | call_rcu(&iter.node->head, delete_ust_app_rcu); |
421cb601 DG |
1447 | } |
1448 | ||
5b4a0ec0 DG |
1449 | hashtable_destroy(ust_app_ht); |
1450 | hashtable_destroy(ust_app_sock_key_map); | |
421cb601 | 1451 | |
5b4a0ec0 DG |
1452 | rcu_read_unlock(); |
1453 | } | |
1454 | ||
1455 | /* | |
1456 | * Init UST app hash table. | |
1457 | */ | |
1458 | void ust_app_ht_alloc(void) | |
1459 | { | |
1460 | ust_app_ht = hashtable_new(0); | |
1461 | ust_app_sock_key_map = hashtable_new(0); | |
421cb601 DG |
1462 | } |
1463 | ||
78f0bacd DG |
1464 | /* |
1465 | * For a specific UST session, disable the channel for all registered apps. | |
1466 | */ | |
35a9059d | 1467 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1468 | struct ltt_ust_channel *uchan) |
1469 | { | |
1470 | int ret = 0; | |
1471 | struct cds_lfht_iter iter; | |
8535a6d9 | 1472 | struct cds_lfht_node *ua_chan_node; |
78f0bacd DG |
1473 | struct ust_app *app; |
1474 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1475 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1476 | |
1477 | if (usess == NULL || uchan == NULL) { | |
1478 | ERR("Disabling UST global channel with NULL values"); | |
1479 | ret = -1; | |
1480 | goto error; | |
1481 | } | |
1482 | ||
a991f516 MD |
1483 | DBG2("UST app disabling channel %s from global domain for session id %d", |
1484 | uchan->name, usess->id); | |
78f0bacd DG |
1485 | |
1486 | rcu_read_lock(); | |
1487 | ||
1488 | /* For every registered applications */ | |
1489 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
90eaa0d2 DG |
1490 | struct cds_lfht_iter uiter; |
1491 | ||
78f0bacd DG |
1492 | ua_sess = lookup_session_by_app(usess, app); |
1493 | if (ua_sess == NULL) { | |
1494 | continue; | |
1495 | } | |
1496 | ||
8535a6d9 DG |
1497 | /* Get channel */ |
1498 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
90eaa0d2 | 1499 | (void *)uchan->name, strlen(uchan->name), &uiter); |
8535a6d9 DG |
1500 | /* If the session if found for the app, the channel must be there */ |
1501 | assert(ua_chan_node); | |
1502 | ||
1503 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1504 | /* The channel must not be already disabled */ | |
1505 | assert(ua_chan->enabled == 1); | |
1506 | ||
1507 | /* Disable channel onto application */ | |
1508 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1509 | if (ret < 0) { |
1510 | /* XXX: We might want to report this error at some point... */ | |
1511 | continue; | |
1512 | } | |
1513 | } | |
1514 | ||
1515 | rcu_read_unlock(); | |
1516 | ||
1517 | error: | |
1518 | return ret; | |
1519 | } | |
1520 | ||
1521 | /* | |
1522 | * For a specific UST session, enable the channel for all registered apps. | |
1523 | */ | |
35a9059d | 1524 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1525 | struct ltt_ust_channel *uchan) |
1526 | { | |
1527 | int ret = 0; | |
1528 | struct cds_lfht_iter iter; | |
1529 | struct ust_app *app; | |
1530 | struct ust_app_session *ua_sess; | |
1531 | ||
1532 | if (usess == NULL || uchan == NULL) { | |
1533 | ERR("Adding UST global channel to NULL values"); | |
1534 | ret = -1; | |
1535 | goto error; | |
1536 | } | |
1537 | ||
a991f516 MD |
1538 | DBG2("UST app enabling channel %s to global domain for session id %d", |
1539 | uchan->name, usess->id); | |
78f0bacd DG |
1540 | |
1541 | rcu_read_lock(); | |
1542 | ||
1543 | /* For every registered applications */ | |
1544 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1545 | ua_sess = lookup_session_by_app(usess, app); | |
1546 | if (ua_sess == NULL) { | |
1547 | continue; | |
1548 | } | |
1549 | ||
1550 | /* Enable channel onto application */ | |
1551 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1552 | if (ret < 0) { | |
1553 | /* XXX: We might want to report this error at some point... */ | |
1554 | continue; | |
1555 | } | |
1556 | } | |
1557 | ||
1558 | rcu_read_unlock(); | |
1559 | ||
1560 | error: | |
1561 | return ret; | |
1562 | } | |
1563 | ||
b0a40d28 DG |
1564 | /* |
1565 | * Disable an event in a channel and for a specific session. | |
1566 | */ | |
35a9059d DG |
1567 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
1568 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
1569 | { |
1570 | int ret = 0; | |
90eaa0d2 | 1571 | struct cds_lfht_iter iter; |
b0a40d28 DG |
1572 | struct cds_lfht_node *ua_chan_node, *ua_event_node; |
1573 | struct ust_app *app; | |
1574 | struct ust_app_session *ua_sess; | |
1575 | struct ust_app_channel *ua_chan; | |
1576 | struct ust_app_event *ua_event; | |
1577 | ||
1578 | DBG("UST app disabling event %s for all apps in channel " | |
a991f516 | 1579 | "%s for session id %d", uevent->attr.name, uchan->name, usess->id); |
b0a40d28 DG |
1580 | |
1581 | rcu_read_lock(); | |
1582 | ||
1583 | /* For all registered applications */ | |
1584 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
90eaa0d2 DG |
1585 | struct cds_lfht_iter uiter; |
1586 | ||
b0a40d28 DG |
1587 | ua_sess = lookup_session_by_app(usess, app); |
1588 | if (ua_sess == NULL) { | |
1589 | /* Next app */ | |
1590 | continue; | |
1591 | } | |
1592 | ||
1593 | /* Lookup channel in the ust app session */ | |
1594 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
1595 | (void *)uchan->name, strlen(uchan->name), &uiter); | |
1596 | if (ua_chan_node == NULL) { | |
a991f516 MD |
1597 | DBG2("Channel %s not found in session id %d for app pid %d." |
1598 | "Skipping", uchan->name, usess->id, app->key.pid); | |
b0a40d28 DG |
1599 | continue; |
1600 | } | |
1601 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1602 | ||
1603 | ua_event_node = hashtable_lookup(ua_chan->events, | |
35a9059d | 1604 | (void *)uevent->attr.name, strlen(uevent->attr.name), &uiter); |
b0a40d28 DG |
1605 | if (ua_event_node == NULL) { |
1606 | DBG2("Event %s not found in channel %s for app pid %d." | |
35a9059d | 1607 | "Skipping", uevent->attr.name, uchan->name, app->key.pid); |
b0a40d28 DG |
1608 | continue; |
1609 | } | |
1610 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1611 | ||
7f79d3a1 | 1612 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
b0a40d28 DG |
1613 | if (ret < 0) { |
1614 | /* XXX: Report error someday... */ | |
1615 | continue; | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | rcu_read_unlock(); | |
1620 | ||
1621 | return ret; | |
1622 | } | |
1623 | ||
9730260e | 1624 | /* |
edb67388 | 1625 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
1626 | * registered apps. |
1627 | */ | |
35a9059d | 1628 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
1629 | struct ltt_ust_channel *uchan) |
1630 | { | |
1631 | int ret = 0; | |
90eaa0d2 | 1632 | struct cds_lfht_iter iter; |
9730260e DG |
1633 | struct cds_lfht_node *ua_chan_node; |
1634 | struct ust_app *app; | |
1635 | struct ust_app_session *ua_sess; | |
1636 | struct ust_app_channel *ua_chan; | |
1637 | struct ust_app_event *ua_event; | |
1638 | ||
1639 | DBG("UST app disabling all event for all apps in channel " | |
a991f516 | 1640 | "%s for session id %d", uchan->name, usess->id); |
9730260e DG |
1641 | |
1642 | rcu_read_lock(); | |
1643 | ||
1644 | /* For all registered applications */ | |
1645 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
90eaa0d2 DG |
1646 | struct cds_lfht_iter uiter; |
1647 | ||
9730260e | 1648 | ua_sess = lookup_session_by_app(usess, app); |
edb67388 DG |
1649 | /* If ua_sess is NULL, there is a code flow error */ |
1650 | assert(ua_sess); | |
9730260e DG |
1651 | |
1652 | /* Lookup channel in the ust app session */ | |
edb67388 DG |
1653 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, |
1654 | strlen(uchan->name), &uiter); | |
1655 | /* If the channel is not found, there is a code flow error */ | |
1656 | assert(ua_chan_node); | |
1657 | ||
9730260e DG |
1658 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1659 | ||
1660 | /* Disable each events of channel */ | |
1661 | cds_lfht_for_each_entry(ua_chan->events, &uiter, ua_event, node) { | |
7f79d3a1 | 1662 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
9730260e DG |
1663 | if (ret < 0) { |
1664 | /* XXX: Report error someday... */ | |
1665 | continue; | |
1666 | } | |
1667 | } | |
1668 | } | |
1669 | ||
1670 | rcu_read_unlock(); | |
1671 | ||
1672 | return ret; | |
1673 | } | |
1674 | ||
421cb601 | 1675 | /* |
5b4a0ec0 | 1676 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1677 | */ |
35a9059d | 1678 | int ust_app_create_channel_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1679 | struct ltt_ust_channel *uchan) |
1680 | { | |
1681 | int ret = 0; | |
1682 | struct cds_lfht_iter iter; | |
48842b30 DG |
1683 | struct ust_app *app; |
1684 | struct ust_app_session *ua_sess; | |
1685 | struct ust_app_channel *ua_chan; | |
1686 | ||
421cb601 DG |
1687 | if (usess == NULL || uchan == NULL) { |
1688 | ERR("Adding UST global channel to NULL values"); | |
1689 | ret = -1; | |
1690 | goto error; | |
1691 | } | |
1692 | ||
a991f516 MD |
1693 | DBG2("UST app adding channel %s to global domain for session id %d", |
1694 | uchan->name, usess->id); | |
48842b30 DG |
1695 | |
1696 | rcu_read_lock(); | |
421cb601 | 1697 | |
5b4a0ec0 DG |
1698 | /* For every registered applications */ |
1699 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
edb67388 DG |
1700 | /* |
1701 | * Create session on the tracer side and add it to app session HT. Note | |
1702 | * that if session exist, it will simply return a pointer to the ust | |
1703 | * app session. | |
1704 | */ | |
421cb601 | 1705 | ua_sess = create_ust_app_session(usess, app); |
509cbaf8 | 1706 | if (ua_sess == NULL) { |
5b4a0ec0 | 1707 | continue; |
48842b30 DG |
1708 | } |
1709 | ||
421cb601 DG |
1710 | /* Create channel onto application */ |
1711 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1712 | if (ua_chan == NULL) { | |
5b4a0ec0 | 1713 | continue; |
48842b30 | 1714 | } |
48842b30 | 1715 | } |
5b4a0ec0 | 1716 | |
48842b30 DG |
1717 | rcu_read_unlock(); |
1718 | ||
421cb601 | 1719 | error: |
48842b30 DG |
1720 | return ret; |
1721 | } | |
1722 | ||
5b4a0ec0 | 1723 | /* |
edb67388 | 1724 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 1725 | */ |
35a9059d | 1726 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1727 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1728 | { | |
1729 | int ret = 0; | |
90eaa0d2 | 1730 | struct cds_lfht_iter iter; |
35a9059d | 1731 | struct cds_lfht_node *ua_chan_node, *ua_event_node; |
48842b30 DG |
1732 | struct ust_app *app; |
1733 | struct ust_app_session *ua_sess; | |
1734 | struct ust_app_channel *ua_chan; | |
1735 | struct ust_app_event *ua_event; | |
48842b30 | 1736 | |
a991f516 MD |
1737 | DBG("UST app enabling event %s for all apps for session id %d", |
1738 | uevent->attr.name, usess->id); | |
48842b30 | 1739 | |
edb67388 DG |
1740 | /* |
1741 | * NOTE: At this point, this function is called only if the session and | |
1742 | * channel passed are already created for all apps. and enabled on the | |
1743 | * tracer also. | |
1744 | */ | |
1745 | ||
48842b30 | 1746 | rcu_read_lock(); |
421cb601 DG |
1747 | |
1748 | /* For all registered applications */ | |
5b4a0ec0 | 1749 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
90eaa0d2 DG |
1750 | struct cds_lfht_iter uiter; |
1751 | ||
edb67388 DG |
1752 | ua_sess = lookup_session_by_app(usess, app); |
1753 | /* If ua_sess is NULL, there is a code flow error */ | |
1754 | assert(ua_sess); | |
ba767faf | 1755 | |
edb67388 DG |
1756 | /* Lookup channel in the ust app session */ |
1757 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, | |
1758 | strlen(uchan->name), &uiter); | |
1759 | /* If the channel is not found, there is a code flow error */ | |
1760 | assert(ua_chan_node); | |
1761 | ||
1762 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1763 | ||
7f79d3a1 | 1764 | ua_event_node = hashtable_lookup(ua_chan->events, |
35a9059d DG |
1765 | (void*)uevent->attr.name, strlen(uevent->attr.name), &uiter); |
1766 | if (ua_event_node == NULL) { | |
7f79d3a1 DG |
1767 | DBG3("UST app enable event %s not found for app PID %d." |
1768 | "Skipping app", uevent->attr.name, app->key.pid); | |
35a9059d DG |
1769 | continue; |
1770 | } | |
1771 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1772 | ||
1773 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
1774 | if (ret < 0) { | |
7f79d3a1 | 1775 | goto error; |
48842b30 | 1776 | } |
edb67388 DG |
1777 | } |
1778 | ||
7f79d3a1 | 1779 | error: |
edb67388 | 1780 | rcu_read_unlock(); |
edb67388 DG |
1781 | return ret; |
1782 | } | |
1783 | ||
1784 | /* | |
1785 | * For a specific existing UST session and UST channel, creates the event for | |
1786 | * all registered apps. | |
1787 | */ | |
35a9059d | 1788 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
1789 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1790 | { | |
1791 | int ret = 0; | |
90eaa0d2 | 1792 | struct cds_lfht_iter iter; |
edb67388 DG |
1793 | struct cds_lfht_node *ua_chan_node; |
1794 | struct ust_app *app; | |
1795 | struct ust_app_session *ua_sess; | |
1796 | struct ust_app_channel *ua_chan; | |
1797 | ||
a991f516 MD |
1798 | DBG("UST app creating event %s for all apps for session id %d", |
1799 | uevent->attr.name, usess->id); | |
edb67388 DG |
1800 | |
1801 | /* | |
1802 | * NOTE: At this point, this function is called only if the session and | |
1803 | * channel passed are already created for all apps. and enabled on the | |
1804 | * tracer also. | |
1805 | */ | |
1806 | ||
1807 | rcu_read_lock(); | |
1808 | ||
1809 | /* For all registered applications */ | |
1810 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
90eaa0d2 DG |
1811 | struct cds_lfht_iter uiter; |
1812 | ||
edb67388 DG |
1813 | ua_sess = lookup_session_by_app(usess, app); |
1814 | /* If ua_sess is NULL, there is a code flow error */ | |
1815 | assert(ua_sess); | |
48842b30 DG |
1816 | |
1817 | /* Lookup channel in the ust app session */ | |
edb67388 DG |
1818 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, |
1819 | strlen(uchan->name), &uiter); | |
1820 | /* If the channel is not found, there is a code flow error */ | |
1821 | assert(ua_chan_node); | |
1822 | ||
48842b30 DG |
1823 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1824 | ||
edb67388 DG |
1825 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1826 | if (ret < 0) { | |
5b4a0ec0 | 1827 | continue; |
48842b30 | 1828 | } |
48842b30 | 1829 | } |
5b4a0ec0 | 1830 | |
48842b30 DG |
1831 | rcu_read_unlock(); |
1832 | ||
1833 | return ret; | |
1834 | } | |
1835 | ||
5b4a0ec0 DG |
1836 | /* |
1837 | * Start tracing for a specific UST session and app. | |
1838 | */ | |
421cb601 | 1839 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1840 | { |
1841 | int ret = 0; | |
1842 | struct cds_lfht_iter iter; | |
48842b30 DG |
1843 | struct ust_app_session *ua_sess; |
1844 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 1845 | struct ltt_ust_stream *ustream; |
7753dea8 | 1846 | int consumerd_fd; |
48842b30 | 1847 | |
421cb601 | 1848 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 1849 | |
509cbaf8 MD |
1850 | rcu_read_lock(); |
1851 | ||
421cb601 DG |
1852 | ua_sess = lookup_session_by_app(usess, app); |
1853 | if (ua_sess == NULL) { | |
509cbaf8 | 1854 | goto error_rcu_unlock; |
421cb601 | 1855 | } |
48842b30 | 1856 | |
aea829b3 DG |
1857 | /* Upon restart, we skip the setup, already done */ |
1858 | if (ua_sess->started) { | |
8be98f9a | 1859 | goto skip_setup; |
aea829b3 | 1860 | } |
8be98f9a | 1861 | |
421cb601 DG |
1862 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1863 | if (ret < 0) { | |
509cbaf8 | 1864 | goto error_rcu_unlock; |
421cb601 | 1865 | } |
48842b30 | 1866 | |
421cb601 | 1867 | /* For each channel */ |
5b4a0ec0 | 1868 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { |
421cb601 DG |
1869 | /* Create all streams */ |
1870 | while (1) { | |
5b4a0ec0 | 1871 | /* Create UST stream */ |
421cb601 DG |
1872 | ustream = zmalloc(sizeof(*ustream)); |
1873 | if (ustream == NULL) { | |
1874 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1875 | goto error_rcu_unlock; |
421cb601 | 1876 | } |
48842b30 | 1877 | |
421cb601 DG |
1878 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
1879 | &ustream->obj); | |
48842b30 | 1880 | if (ret < 0) { |
421cb601 DG |
1881 | /* Got all streams */ |
1882 | break; | |
48842b30 | 1883 | } |
421cb601 | 1884 | ustream->handle = ustream->obj->handle; |
48842b30 | 1885 | |
421cb601 DG |
1886 | /* Order is important */ |
1887 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
477d7741 MD |
1888 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", |
1889 | ua_sess->path, ua_chan->name, | |
1890 | ua_chan->streams.count++); | |
aba8e916 DG |
1891 | if (ret < 0) { |
1892 | PERROR("asprintf UST create stream"); | |
421cb601 | 1893 | continue; |
aba8e916 | 1894 | } |
421cb601 DG |
1895 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1896 | ustream->pathname); | |
1897 | } | |
421cb601 | 1898 | } |
aba8e916 | 1899 | |
7753dea8 MD |
1900 | switch (app->bits_per_long) { |
1901 | case 64: | |
1902 | consumerd_fd = ust_consumerd64_fd; | |
1903 | break; | |
1904 | case 32: | |
1905 | consumerd_fd = ust_consumerd32_fd; | |
1906 | break; | |
1907 | default: | |
1908 | ret = -EINVAL; | |
1909 | goto error_rcu_unlock; | |
1910 | } | |
aea829b3 | 1911 | |
421cb601 | 1912 | /* Setup UST consumer socket and send fds to it */ |
7753dea8 | 1913 | ret = ust_consumer_send_session(consumerd_fd, ua_sess); |
421cb601 | 1914 | if (ret < 0) { |
509cbaf8 | 1915 | goto error_rcu_unlock; |
421cb601 | 1916 | } |
8be98f9a | 1917 | ua_sess->started = 1; |
48842b30 | 1918 | |
8be98f9a | 1919 | skip_setup: |
421cb601 DG |
1920 | /* This start the UST tracing */ |
1921 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
1922 | if (ret < 0) { | |
1923 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 1924 | goto error_rcu_unlock; |
421cb601 | 1925 | } |
5b4a0ec0 | 1926 | |
509cbaf8 | 1927 | rcu_read_unlock(); |
48842b30 | 1928 | |
421cb601 DG |
1929 | /* Quiescent wait after starting trace */ |
1930 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 1931 | |
421cb601 | 1932 | return 0; |
48842b30 | 1933 | |
509cbaf8 MD |
1934 | error_rcu_unlock: |
1935 | rcu_read_unlock(); | |
421cb601 DG |
1936 | return -1; |
1937 | } | |
48842b30 | 1938 | |
8be98f9a MD |
1939 | /* |
1940 | * Stop tracing for a specific UST session and app. | |
1941 | */ | |
1942 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1943 | { | |
1944 | int ret = 0; | |
6d3686da | 1945 | struct cds_lfht_iter iter; |
8be98f9a | 1946 | struct ust_app_session *ua_sess; |
6d3686da | 1947 | struct ust_app_channel *ua_chan; |
8be98f9a MD |
1948 | |
1949 | DBG("Stopping tracing for ust app pid %d", app->key.pid); | |
1950 | ||
1951 | rcu_read_lock(); | |
1952 | ||
1953 | ua_sess = lookup_session_by_app(usess, app); | |
1954 | if (ua_sess == NULL) { | |
1955 | /* Only malloc can failed so something is really wrong */ | |
1956 | goto error_rcu_unlock; | |
1957 | } | |
1958 | ||
9d6c7d3f DG |
1959 | /* This inhibits UST tracing */ |
1960 | ret = ustctl_stop_session(app->key.sock, ua_sess->handle); | |
1961 | if (ret < 0) { | |
1962 | ERR("Error stopping tracing for app pid: %d", app->key.pid); | |
1963 | goto error_rcu_unlock; | |
1964 | } | |
1965 | ||
1966 | /* Quiescent wait after stopping trace */ | |
1967 | ustctl_wait_quiescent(app->key.sock); | |
1968 | ||
1969 | /* Flushing buffers */ | |
6d3686da DG |
1970 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { |
1971 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_chan->obj); | |
8be98f9a | 1972 | if (ret < 0) { |
6d3686da DG |
1973 | ERR("UST app PID %d channel %s flush failed", |
1974 | app->key.pid, ua_chan->name); | |
1975 | ERR("Ended with ret %d", ret); | |
1976 | /* Continuing flushing all buffers */ | |
1977 | continue; | |
8be98f9a MD |
1978 | } |
1979 | } | |
8be98f9a | 1980 | |
90d97d10 DG |
1981 | /* Flush all buffers before stopping */ |
1982 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_sess->metadata->obj); | |
1983 | if (ret < 0) { | |
1984 | ERR("UST app PID %d metadata flush failed", app->key.pid); | |
1985 | ERR("Ended with ret %d", ret); | |
1986 | } | |
1987 | ||
9d6c7d3f DG |
1988 | rcu_read_unlock(); |
1989 | ||
8be98f9a MD |
1990 | return 0; |
1991 | ||
1992 | error_rcu_unlock: | |
1993 | rcu_read_unlock(); | |
1994 | return -1; | |
1995 | } | |
1996 | ||
84cd17c6 MD |
1997 | /* |
1998 | * Destroy a specific UST session in apps. | |
1999 | */ | |
2000 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2001 | { | |
2002 | struct ust_app_session *ua_sess; | |
2003 | struct lttng_ust_object_data obj; | |
2004 | struct cds_lfht_iter iter; | |
2005 | struct cds_lfht_node *node; | |
525b0740 | 2006 | int ret; |
84cd17c6 MD |
2007 | |
2008 | DBG("Destroy tracing for ust app pid %d", app->key.pid); | |
2009 | ||
2010 | rcu_read_lock(); | |
2011 | ||
2012 | __lookup_session_by_app(usess, app, &iter); | |
2013 | node = hashtable_iter_get_node(&iter); | |
2014 | if (node == NULL) { | |
2015 | /* Only malloc can failed so something is really wrong */ | |
2016 | goto error_rcu_unlock; | |
2017 | } | |
2018 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
525b0740 MD |
2019 | ret = hashtable_del(app->sessions, &iter); |
2020 | assert(!ret); | |
84cd17c6 MD |
2021 | delete_ust_app_session(app->key.sock, ua_sess); |
2022 | obj.handle = ua_sess->handle; | |
2023 | obj.shm_fd = -1; | |
2024 | obj.wait_fd = -1; | |
2025 | obj.memory_map_size = 0; | |
2026 | ustctl_release_object(app->key.sock, &obj); | |
2027 | ||
2028 | rcu_read_unlock(); | |
2029 | ||
2030 | /* Quiescent wait after stopping trace */ | |
2031 | ustctl_wait_quiescent(app->key.sock); | |
2032 | ||
2033 | return 0; | |
2034 | ||
2035 | error_rcu_unlock: | |
2036 | rcu_read_unlock(); | |
2037 | return -1; | |
2038 | } | |
2039 | ||
5b4a0ec0 DG |
2040 | /* |
2041 | * Start tracing for the UST session. | |
2042 | */ | |
421cb601 DG |
2043 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
2044 | { | |
2045 | int ret = 0; | |
2046 | struct cds_lfht_iter iter; | |
421cb601 | 2047 | struct ust_app *app; |
48842b30 | 2048 | |
421cb601 DG |
2049 | DBG("Starting all UST traces"); |
2050 | ||
2051 | rcu_read_lock(); | |
421cb601 | 2052 | |
5b4a0ec0 | 2053 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
421cb601 | 2054 | ret = ust_app_start_trace(usess, app); |
48842b30 | 2055 | if (ret < 0) { |
5b4a0ec0 DG |
2056 | /* Continue to next apps even on error */ |
2057 | continue; | |
48842b30 | 2058 | } |
48842b30 | 2059 | } |
5b4a0ec0 | 2060 | |
48842b30 DG |
2061 | rcu_read_unlock(); |
2062 | ||
2063 | return 0; | |
2064 | } | |
487cf67c | 2065 | |
8be98f9a MD |
2066 | /* |
2067 | * Start tracing for the UST session. | |
2068 | */ | |
2069 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
2070 | { | |
2071 | int ret = 0; | |
2072 | struct cds_lfht_iter iter; | |
2073 | struct ust_app *app; | |
2074 | ||
2075 | DBG("Stopping all UST traces"); | |
2076 | ||
2077 | rcu_read_lock(); | |
2078 | ||
2079 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
2080 | ret = ust_app_stop_trace(usess, app); | |
2081 | if (ret < 0) { | |
2082 | /* Continue to next apps even on error */ | |
2083 | continue; | |
2084 | } | |
2085 | } | |
2086 | ||
2087 | rcu_read_unlock(); | |
2088 | ||
2089 | return 0; | |
2090 | } | |
2091 | ||
84cd17c6 MD |
2092 | /* |
2093 | * Destroy app UST session. | |
2094 | */ | |
2095 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
2096 | { | |
2097 | int ret = 0; | |
2098 | struct cds_lfht_iter iter; | |
2099 | struct ust_app *app; | |
2100 | ||
2101 | DBG("Destroy all UST traces"); | |
2102 | ||
2103 | rcu_read_lock(); | |
2104 | ||
2105 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
2106 | ret = ust_app_destroy_trace(usess, app); | |
2107 | if (ret < 0) { | |
2108 | /* Continue to next apps even on error */ | |
2109 | continue; | |
2110 | } | |
2111 | } | |
2112 | ||
2113 | rcu_read_unlock(); | |
2114 | ||
2115 | return 0; | |
2116 | } | |
2117 | ||
5b4a0ec0 DG |
2118 | /* |
2119 | * Add channels/events from UST global domain to registered apps at sock. | |
2120 | */ | |
487cf67c DG |
2121 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
2122 | { | |
2123 | int ret = 0; | |
487cf67c | 2124 | struct cds_lfht_iter iter; |
487cf67c DG |
2125 | struct ust_app *app; |
2126 | struct ust_app_session *ua_sess; | |
2127 | struct ust_app_channel *ua_chan; | |
2128 | struct ust_app_event *ua_event; | |
1f3580c7 DG |
2129 | |
2130 | if (usess == NULL) { | |
5b4a0ec0 | 2131 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
2132 | goto error; |
2133 | } | |
2134 | ||
a991f516 MD |
2135 | DBG2("UST app global update for app sock %d for session id %d", sock, |
2136 | usess->id); | |
487cf67c | 2137 | |
284d8f55 DG |
2138 | rcu_read_lock(); |
2139 | ||
487cf67c DG |
2140 | app = find_app_by_sock(sock); |
2141 | if (app == NULL) { | |
2142 | ERR("Failed to update app sock %d", sock); | |
2143 | goto error; | |
2144 | } | |
2145 | ||
421cb601 | 2146 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 2147 | if (ua_sess == NULL) { |
487cf67c DG |
2148 | goto error; |
2149 | } | |
2150 | ||
284d8f55 DG |
2151 | /* |
2152 | * We can iterate safely here over all UST app session sicne the create ust | |
2153 | * app session above made a shadow copy of the UST global domain from the | |
2154 | * ltt ust session. | |
2155 | */ | |
2156 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { | |
90eaa0d2 DG |
2157 | struct cds_lfht_iter uiter; |
2158 | ||
284d8f55 DG |
2159 | ret = create_ust_channel(app, ua_sess, ua_chan); |
2160 | if (ret < 0) { | |
2161 | /* FIXME: Should we quit here or continue... */ | |
2162 | continue; | |
487cf67c DG |
2163 | } |
2164 | ||
284d8f55 | 2165 | /* For each events */ |
90eaa0d2 | 2166 | cds_lfht_for_each_entry(ua_chan->events, &uiter, ua_event, node) { |
284d8f55 DG |
2167 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
2168 | if (ret < 0) { | |
2169 | /* FIXME: Should we quit here or continue... */ | |
2170 | continue; | |
487cf67c | 2171 | } |
36dc12cc | 2172 | } |
487cf67c DG |
2173 | } |
2174 | ||
36dc12cc | 2175 | if (usess->start_trace) { |
421cb601 | 2176 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 2177 | if (ret < 0) { |
36dc12cc DG |
2178 | goto error; |
2179 | } | |
2180 | ||
36dc12cc DG |
2181 | DBG2("UST trace started for app pid %d", app->key.pid); |
2182 | } | |
2183 | ||
487cf67c DG |
2184 | error: |
2185 | rcu_read_unlock(); | |
2186 | return; | |
2187 | } | |
55cc08a6 DG |
2188 | |
2189 | /* | |
2190 | * Add context to a specific channel for global UST domain. | |
2191 | */ | |
2192 | int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess, | |
2193 | struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx) | |
2194 | { | |
2195 | int ret = 0; | |
2196 | struct cds_lfht_node *ua_chan_node; | |
90eaa0d2 | 2197 | struct cds_lfht_iter iter; |
55cc08a6 DG |
2198 | struct ust_app_channel *ua_chan = NULL; |
2199 | struct ust_app_session *ua_sess; | |
2200 | struct ust_app *app; | |
2201 | ||
2202 | rcu_read_lock(); | |
2203 | ||
2204 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
90eaa0d2 DG |
2205 | struct cds_lfht_iter uiter; |
2206 | ||
55cc08a6 DG |
2207 | ua_sess = lookup_session_by_app(usess, app); |
2208 | if (ua_sess == NULL) { | |
2209 | continue; | |
2210 | } | |
2211 | ||
2212 | /* Lookup channel in the ust app session */ | |
2213 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
2214 | (void *)uchan->name, strlen(uchan->name), &uiter); | |
2215 | if (ua_chan_node == NULL) { | |
2216 | continue; | |
2217 | } | |
2218 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2219 | node); | |
2220 | ||
2221 | ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app); | |
2222 | if (ret < 0) { | |
2223 | continue; | |
2224 | } | |
2225 | } | |
2226 | ||
55cc08a6 DG |
2227 | rcu_read_unlock(); |
2228 | return ret; | |
2229 | } | |
2230 | ||
2231 | /* | |
2232 | * Add context to a specific event in a channel for global UST domain. | |
2233 | */ | |
2234 | int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess, | |
2235 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
2236 | struct ltt_ust_context *uctx) | |
2237 | { | |
2238 | int ret = 0; | |
2239 | struct cds_lfht_node *ua_chan_node, *ua_event_node; | |
90eaa0d2 | 2240 | struct cds_lfht_iter iter; |
55cc08a6 DG |
2241 | struct ust_app_session *ua_sess; |
2242 | struct ust_app_event *ua_event; | |
2243 | struct ust_app_channel *ua_chan = NULL; | |
2244 | struct ust_app *app; | |
2245 | ||
2246 | rcu_read_lock(); | |
2247 | ||
2248 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
90eaa0d2 DG |
2249 | struct cds_lfht_iter uiter; |
2250 | ||
55cc08a6 DG |
2251 | ua_sess = lookup_session_by_app(usess, app); |
2252 | if (ua_sess == NULL) { | |
2253 | continue; | |
2254 | } | |
2255 | ||
2256 | /* Lookup channel in the ust app session */ | |
2257 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
2258 | (void *)uchan->name, strlen(uchan->name), &uiter); | |
2259 | if (ua_chan_node == NULL) { | |
2260 | continue; | |
2261 | } | |
2262 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2263 | node); | |
2264 | ||
2265 | ua_event_node = hashtable_lookup(ua_chan->events, | |
2266 | (void *)uevent->attr.name, strlen(uevent->attr.name), &uiter); | |
2267 | if (ua_event_node == NULL) { | |
2268 | continue; | |
2269 | } | |
2270 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, | |
2271 | node); | |
2272 | ||
2273 | ret = create_ust_app_event_context(ua_sess, ua_event, &uctx->ctx, app); | |
2274 | if (ret < 0) { | |
2275 | continue; | |
2276 | } | |
2277 | } | |
2278 | ||
55cc08a6 DG |
2279 | rcu_read_unlock(); |
2280 | return ret; | |
2281 | } | |
76d45b40 DG |
2282 | |
2283 | /* | |
2284 | * Enable event for a channel from a UST session for a specific PID. | |
2285 | */ | |
2286 | int ust_app_enable_event_pid(struct ltt_ust_session *usess, | |
2287 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2288 | { | |
2289 | int ret = 0; | |
2290 | struct cds_lfht_iter iter; | |
2291 | struct cds_lfht_node *ua_chan_node, *ua_event_node; | |
2292 | struct ust_app *app; | |
2293 | struct ust_app_session *ua_sess; | |
2294 | struct ust_app_channel *ua_chan; | |
2295 | struct ust_app_event *ua_event; | |
2296 | ||
2297 | DBG("UST app enabling event %s for PID %d", uevent->attr.name, pid); | |
2298 | ||
2299 | rcu_read_lock(); | |
2300 | ||
2301 | app = ust_app_find_by_pid(pid); | |
2302 | if (app == NULL) { | |
2303 | ERR("UST app enable event per PID %d not found", pid); | |
2304 | ret = -1; | |
2305 | goto error; | |
2306 | } | |
2307 | ||
2308 | ua_sess = lookup_session_by_app(usess, app); | |
2309 | /* If ua_sess is NULL, there is a code flow error */ | |
2310 | assert(ua_sess); | |
2311 | ||
2312 | /* Lookup channel in the ust app session */ | |
2313 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, | |
2314 | strlen(uchan->name), &iter); | |
2315 | /* If the channel is not found, there is a code flow error */ | |
2316 | assert(ua_chan_node); | |
2317 | ||
2318 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2319 | ||
7f79d3a1 | 2320 | ua_event_node = hashtable_lookup(ua_chan->events, |
76d45b40 DG |
2321 | (void*)uevent->attr.name, strlen(uevent->attr.name), &iter); |
2322 | if (ua_event_node == NULL) { | |
2323 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); | |
2324 | if (ret < 0) { | |
2325 | goto error; | |
2326 | } | |
2327 | } else { | |
2328 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2329 | ||
2330 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2331 | if (ret < 0) { | |
2332 | goto error; | |
2333 | } | |
2334 | } | |
2335 | ||
2336 | error: | |
2337 | rcu_read_unlock(); | |
2338 | return ret; | |
2339 | } | |
7f79d3a1 DG |
2340 | |
2341 | /* | |
2342 | * Disable event for a channel from a UST session for a specific PID. | |
2343 | */ | |
2344 | int ust_app_disable_event_pid(struct ltt_ust_session *usess, | |
2345 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2346 | { | |
2347 | int ret = 0; | |
2348 | struct cds_lfht_iter iter; | |
2349 | struct cds_lfht_node *ua_chan_node, *ua_event_node; | |
2350 | struct ust_app *app; | |
2351 | struct ust_app_session *ua_sess; | |
2352 | struct ust_app_channel *ua_chan; | |
2353 | struct ust_app_event *ua_event; | |
2354 | ||
2355 | DBG("UST app disabling event %s for PID %d", uevent->attr.name, pid); | |
2356 | ||
2357 | rcu_read_lock(); | |
2358 | ||
2359 | app = ust_app_find_by_pid(pid); | |
2360 | if (app == NULL) { | |
2361 | ERR("UST app disable event per PID %d not found", pid); | |
2362 | ret = -1; | |
2363 | goto error; | |
2364 | } | |
2365 | ||
2366 | ua_sess = lookup_session_by_app(usess, app); | |
2367 | /* If ua_sess is NULL, there is a code flow error */ | |
2368 | assert(ua_sess); | |
2369 | ||
2370 | /* Lookup channel in the ust app session */ | |
2371 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, | |
2372 | strlen(uchan->name), &iter); | |
2373 | if (ua_chan_node == NULL) { | |
2374 | /* Channel does not exist, skip disabling */ | |
2375 | goto error; | |
2376 | } | |
2377 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2378 | ||
2379 | ua_event_node = hashtable_lookup(ua_chan->events, | |
2380 | (void*)uevent->attr.name, strlen(uevent->attr.name), &iter); | |
2381 | if (ua_event_node == NULL) { | |
2382 | /* Event does not exist, skip disabling */ | |
2383 | goto error; | |
2384 | } | |
2385 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2386 | ||
2387 | ret = disable_ust_app_event(ua_sess, ua_event, app); | |
2388 | if (ret < 0) { | |
2389 | goto error; | |
2390 | } | |
2391 | ||
2392 | error: | |
2393 | rcu_read_unlock(); | |
2394 | return ret; | |
2395 | } |