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