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