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 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 | |
aee6bafd MD |
166 | if (ua_sess->handle != -1) { |
167 | ustctl_release_handle(sock, ua_sess->handle); | |
168 | } | |
8b366481 | 169 | free(ua_sess); |
d80a6244 | 170 | } |
91d76f53 DG |
171 | |
172 | /* | |
284d8f55 DG |
173 | * Delete a traceable application structure from the global list. Never call |
174 | * this function outside of a call_rcu call. | |
91d76f53 | 175 | */ |
8b366481 DG |
176 | static |
177 | void delete_ust_app(struct ust_app *app) | |
91d76f53 | 178 | { |
8b366481 | 179 | int ret, sock; |
f6a9efaa DG |
180 | struct cds_lfht_node *node; |
181 | struct cds_lfht_iter iter; | |
284d8f55 | 182 | struct ust_app_session *ua_sess; |
44d3bd01 | 183 | |
f6a9efaa | 184 | rcu_read_lock(); |
44d3bd01 | 185 | |
f6a9efaa DG |
186 | /* Remove from key hash table */ |
187 | node = hashtable_lookup(ust_app_sock_key_map, | |
284d8f55 | 188 | (void *) ((unsigned long) app->key.sock), sizeof(void *), &iter); |
f6a9efaa | 189 | if (node == NULL) { |
284d8f55 DG |
190 | /* Not suppose to happen */ |
191 | ERR("UST app key %d not found in key hash table", app->key.sock); | |
d80a6244 | 192 | goto end; |
284d8f55 DG |
193 | } |
194 | ||
195 | ret = hashtable_del(ust_app_sock_key_map, &iter); | |
196 | if (ret) { | |
197 | ERR("UST app unable to delete app sock %d from key hash table", | |
198 | app->key.sock); | |
f6a9efaa | 199 | } else { |
284d8f55 DG |
200 | DBG2("UST app pair sock %d key %d deleted", |
201 | app->key.sock, app->key.pid); | |
f6a9efaa DG |
202 | } |
203 | ||
d80a6244 DG |
204 | /* Socket is already closed at this point */ |
205 | ||
206 | /* Delete ust app sessions info */ | |
6414a713 MD |
207 | sock = app->key.sock; |
208 | app->key.sock = -1; | |
d80a6244 | 209 | |
8b366481 | 210 | /* Wipe sessions */ |
284d8f55 | 211 | cds_lfht_for_each_entry(app->sessions, &iter, ua_sess, node) { |
525b0740 MD |
212 | ret = hashtable_del(app->sessions, &iter); |
213 | assert(!ret); | |
284d8f55 | 214 | delete_ust_app_session(app->key.sock, ua_sess); |
d80a6244 | 215 | } |
284d8f55 | 216 | ret = hashtable_destroy(app->sessions); |
8b366481 | 217 | assert(!ret); |
d80a6244 | 218 | |
6414a713 MD |
219 | /* |
220 | * Wait until we have removed the key from the sock hash table | |
221 | * before closing this socket, otherwise an application could | |
222 | * re-use the socket ID and race with the teardown, using the | |
223 | * same hash table entry. | |
224 | */ | |
225 | close(sock); | |
d80a6244 | 226 | |
284d8f55 DG |
227 | DBG2("UST app pid %d deleted", app->key.pid); |
228 | free(app); | |
d80a6244 | 229 | end: |
f6a9efaa | 230 | rcu_read_unlock(); |
099e26bd DG |
231 | } |
232 | ||
233 | /* | |
f6a9efaa | 234 | * URCU intermediate call to delete an UST app. |
099e26bd | 235 | */ |
8b366481 DG |
236 | static |
237 | void delete_ust_app_rcu(struct rcu_head *head) | |
099e26bd | 238 | { |
f6a9efaa DG |
239 | struct cds_lfht_node *node = |
240 | caa_container_of(head, struct cds_lfht_node, head); | |
241 | struct ust_app *app = | |
242 | caa_container_of(node, struct ust_app, node); | |
243 | ||
244 | delete_ust_app(app); | |
099e26bd DG |
245 | } |
246 | ||
8b366481 DG |
247 | /* |
248 | * Alloc new UST app session. | |
249 | */ | |
250 | static | |
251 | struct ust_app_session *alloc_ust_app_session(void) | |
252 | { | |
253 | struct ust_app_session *ua_sess; | |
254 | ||
255 | /* Init most of the default value by allocating and zeroing */ | |
256 | ua_sess = zmalloc(sizeof(struct ust_app_session)); | |
257 | if (ua_sess == NULL) { | |
258 | PERROR("malloc"); | |
259 | goto error; | |
260 | } | |
261 | ||
262 | ua_sess->handle = -1; | |
263 | ua_sess->channels = hashtable_new_str(0); | |
264 | ||
265 | return ua_sess; | |
266 | ||
267 | error: | |
268 | return NULL; | |
269 | } | |
270 | ||
271 | /* | |
272 | * Alloc new UST app channel. | |
273 | */ | |
274 | static | |
275 | struct ust_app_channel *alloc_ust_app_channel(char *name, | |
276 | struct lttng_ust_channel *attr) | |
277 | { | |
278 | struct ust_app_channel *ua_chan; | |
279 | ||
280 | /* Init most of the default value by allocating and zeroing */ | |
281 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); | |
282 | if (ua_chan == NULL) { | |
283 | PERROR("malloc"); | |
284 | goto error; | |
285 | } | |
286 | ||
287 | /* Setup channel name */ | |
288 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
289 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
290 | ||
291 | ua_chan->enabled = 1; | |
292 | ua_chan->handle = -1; | |
293 | ua_chan->ctx = hashtable_new(0); | |
294 | ua_chan->events = hashtable_new_str(0); | |
295 | hashtable_node_init(&ua_chan->node, (void *) ua_chan->name, | |
296 | strlen(ua_chan->name)); | |
297 | ||
298 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); | |
299 | ||
300 | /* Copy attributes */ | |
301 | if (attr) { | |
302 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
303 | } | |
304 | ||
305 | DBG3("UST app channel %s allocated", ua_chan->name); | |
306 | ||
307 | return ua_chan; | |
308 | ||
309 | error: | |
310 | return NULL; | |
311 | } | |
312 | ||
313 | /* | |
314 | * Alloc new UST app event. | |
315 | */ | |
316 | static | |
317 | struct ust_app_event *alloc_ust_app_event(char *name, | |
318 | struct lttng_ust_event *attr) | |
319 | { | |
320 | struct ust_app_event *ua_event; | |
321 | ||
322 | /* Init most of the default value by allocating and zeroing */ | |
323 | ua_event = zmalloc(sizeof(struct ust_app_event)); | |
324 | if (ua_event == NULL) { | |
325 | PERROR("malloc"); | |
326 | goto error; | |
327 | } | |
328 | ||
329 | ua_event->enabled = 1; | |
330 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
331 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
332 | ua_event->ctx = hashtable_new(0); | |
333 | hashtable_node_init(&ua_event->node, (void *) ua_event->name, | |
334 | strlen(ua_event->name)); | |
335 | ||
336 | /* Copy attributes */ | |
337 | if (attr) { | |
338 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
339 | } | |
340 | ||
341 | DBG3("UST app event %s allocated", ua_event->name); | |
342 | ||
343 | return ua_event; | |
344 | ||
345 | error: | |
346 | return NULL; | |
347 | } | |
348 | ||
349 | /* | |
350 | * Alloc new UST app context. | |
351 | */ | |
352 | static | |
353 | struct ust_app_ctx *alloc_ust_app_ctx(struct lttng_ust_context *uctx) | |
354 | { | |
355 | struct ust_app_ctx *ua_ctx; | |
356 | ||
357 | ua_ctx = zmalloc(sizeof(struct ust_app_ctx)); | |
358 | if (ua_ctx == NULL) { | |
359 | goto error; | |
360 | } | |
361 | ||
362 | if (uctx) { | |
363 | memcpy(&ua_ctx->ctx, uctx, sizeof(ua_ctx->ctx)); | |
364 | } | |
365 | ||
366 | DBG3("UST app context %d allocated", ua_ctx->ctx.ctx); | |
367 | ||
368 | error: | |
369 | return ua_ctx; | |
370 | } | |
371 | ||
099e26bd | 372 | /* |
421cb601 DG |
373 | * Find an ust_app using the sock and return it. RCU read side lock must be |
374 | * held before calling this helper function. | |
099e26bd | 375 | */ |
8b366481 DG |
376 | static |
377 | struct ust_app *find_app_by_sock(int sock) | |
099e26bd | 378 | { |
f6a9efaa DG |
379 | struct cds_lfht_node *node; |
380 | struct ust_app_key *key; | |
381 | struct cds_lfht_iter iter; | |
f6a9efaa | 382 | |
f6a9efaa DG |
383 | node = hashtable_lookup(ust_app_sock_key_map, |
384 | (void *)((unsigned long) sock), sizeof(void *), &iter); | |
385 | if (node == NULL) { | |
386 | DBG2("UST app find by sock %d key not found", sock); | |
f6a9efaa DG |
387 | goto error; |
388 | } | |
389 | ||
390 | key = caa_container_of(node, struct ust_app_key, node); | |
391 | ||
392 | node = hashtable_lookup(ust_app_ht, | |
393 | (void *)((unsigned long) key->pid), sizeof(void *), &iter); | |
394 | if (node == NULL) { | |
395 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
396 | goto error; |
397 | } | |
f6a9efaa DG |
398 | return caa_container_of(node, struct ust_app, node); |
399 | ||
400 | error: | |
401 | return NULL; | |
099e26bd DG |
402 | } |
403 | ||
55cc08a6 DG |
404 | /* |
405 | * Create the channel context on the tracer. | |
406 | */ | |
407 | static | |
408 | int create_ust_channel_context(struct ust_app_channel *ua_chan, | |
409 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
410 | { | |
411 | int ret; | |
412 | ||
413 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
414 | ua_chan->obj, &ua_ctx->obj); | |
415 | if (ret < 0) { | |
416 | goto error; | |
417 | } | |
418 | ||
419 | ua_ctx->handle = ua_ctx->obj->handle; | |
420 | ||
421 | DBG2("UST app context added to channel %s successfully", ua_chan->name); | |
422 | ||
423 | error: | |
424 | return ret; | |
425 | } | |
426 | ||
427 | /* | |
428 | * Create the event context on the tracer. | |
429 | */ | |
430 | static | |
431 | int create_ust_event_context(struct ust_app_event *ua_event, | |
432 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
433 | { | |
434 | int ret; | |
435 | ||
436 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
437 | ua_event->obj, &ua_ctx->obj); | |
438 | if (ret < 0) { | |
439 | goto error; | |
440 | } | |
441 | ||
442 | ua_ctx->handle = ua_ctx->obj->handle; | |
443 | ||
444 | DBG2("UST app context added to event %s successfully", ua_event->name); | |
445 | ||
446 | error: | |
447 | return ret; | |
448 | } | |
449 | ||
9730260e DG |
450 | /* |
451 | * Disable the specified event on to UST tracer for the UST session. | |
452 | */ | |
453 | static int disable_ust_event(struct ust_app *app, | |
454 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
455 | { | |
456 | int ret; | |
457 | ||
458 | ret = ustctl_disable(app->key.sock, ua_event->obj); | |
459 | if (ret < 0) { | |
460 | ERR("UST app event %s disable failed for app (pid: %d) " | |
461 | "and session handle %d with ret %d", | |
462 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
463 | goto error; | |
464 | } | |
465 | ||
466 | DBG2("UST app event %s disabled successfully for app (pid: %d)", | |
467 | ua_event->attr.name, app->key.pid); | |
468 | ||
469 | error: | |
470 | return ret; | |
471 | } | |
472 | ||
78f0bacd DG |
473 | /* |
474 | * Disable the specified channel on to UST tracer for the UST session. | |
475 | */ | |
476 | static int disable_ust_channel(struct ust_app *app, | |
477 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
478 | { | |
479 | int ret; | |
480 | ||
481 | ret = ustctl_disable(app->key.sock, ua_chan->obj); | |
482 | if (ret < 0) { | |
483 | ERR("UST app channel %s disable failed for app (pid: %d) " | |
484 | "and session handle %d with ret %d", | |
485 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
486 | goto error; | |
487 | } | |
488 | ||
78f0bacd DG |
489 | DBG2("UST app channel %s disabled successfully for app (pid: %d)", |
490 | ua_chan->name, app->key.pid); | |
491 | ||
492 | error: | |
493 | return ret; | |
494 | } | |
495 | ||
496 | /* | |
497 | * Enable the specified channel on to UST tracer for the UST session. | |
498 | */ | |
499 | static int enable_ust_channel(struct ust_app *app, | |
500 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
501 | { | |
502 | int ret; | |
503 | ||
504 | ret = ustctl_enable(app->key.sock, ua_chan->obj); | |
505 | if (ret < 0) { | |
506 | ERR("UST app channel %s enable failed for app (pid: %d) " | |
507 | "and session handle %d with ret %d", | |
508 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
509 | goto error; | |
510 | } | |
511 | ||
512 | ua_chan->enabled = 1; | |
513 | ||
514 | DBG2("UST app channel %s enabled successfully for app (pid: %d)", | |
515 | ua_chan->name, app->key.pid); | |
516 | ||
517 | error: | |
518 | return ret; | |
519 | } | |
520 | ||
edb67388 DG |
521 | /* |
522 | * Enable the specified event on to UST tracer for the UST session. | |
523 | */ | |
524 | static int enable_ust_event(struct ust_app *app, | |
525 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
526 | { | |
527 | int ret; | |
528 | ||
529 | ret = ustctl_enable(app->key.sock, ua_event->obj); | |
530 | if (ret < 0) { | |
531 | ERR("UST app event %s enable failed for app (pid: %d) " | |
532 | "and session handle %d with ret %d", | |
533 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
534 | goto error; | |
535 | } | |
536 | ||
537 | DBG2("UST app event %s enabled successfully for app (pid: %d)", | |
538 | ua_event->attr.name, app->key.pid); | |
539 | ||
540 | error: | |
541 | return ret; | |
542 | } | |
543 | ||
099e26bd | 544 | /* |
5b4a0ec0 | 545 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 546 | */ |
5b4a0ec0 DG |
547 | static int open_ust_metadata(struct ust_app *app, |
548 | struct ust_app_session *ua_sess) | |
0177d773 | 549 | { |
5b4a0ec0 DG |
550 | int ret; |
551 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 552 | |
5b4a0ec0 DG |
553 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
554 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
555 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
556 | uattr.switch_timer_interval = | |
557 | ua_sess->metadata->attr.switch_timer_interval; | |
558 | uattr.read_timer_interval = | |
559 | ua_sess->metadata->attr.read_timer_interval; | |
560 | uattr.output = ua_sess->metadata->attr.output; | |
561 | ||
562 | /* UST tracer metadata creation */ | |
563 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
564 | &ua_sess->metadata->obj); | |
565 | if (ret < 0) { | |
566 | ERR("UST app open metadata failed for app pid:%d", | |
567 | app->key.pid); | |
f6a9efaa | 568 | goto error; |
0177d773 | 569 | } |
f6a9efaa | 570 | |
6d3686da DG |
571 | ua_sess->metadata->handle = ua_sess->metadata->obj->handle; |
572 | ||
f6a9efaa | 573 | error: |
5b4a0ec0 | 574 | return ret; |
91d76f53 DG |
575 | } |
576 | ||
577 | /* | |
5b4a0ec0 | 578 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 579 | */ |
5b4a0ec0 DG |
580 | static int create_ust_stream(struct ust_app *app, |
581 | struct ust_app_session *ua_sess) | |
91d76f53 | 582 | { |
5b4a0ec0 | 583 | int ret; |
421cb601 | 584 | |
5b4a0ec0 DG |
585 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, |
586 | &ua_sess->metadata->stream_obj); | |
587 | if (ret < 0) { | |
588 | ERR("UST create metadata stream failed"); | |
421cb601 | 589 | goto error; |
91d76f53 | 590 | } |
421cb601 | 591 | |
421cb601 | 592 | error: |
5b4a0ec0 | 593 | return ret; |
91d76f53 DG |
594 | } |
595 | ||
b551a063 | 596 | /* |
5b4a0ec0 | 597 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 598 | */ |
5b4a0ec0 DG |
599 | static int create_ust_channel(struct ust_app *app, |
600 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 601 | { |
5b4a0ec0 | 602 | int ret; |
b551a063 | 603 | |
5b4a0ec0 DG |
604 | /* TODO: remove cast and use lttng-ust-abi.h */ |
605 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
606 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); | |
607 | if (ret < 0) { | |
608 | DBG("Error creating channel %s for app (pid: %d, sock: %d) " | |
609 | "and session handle %d with ret %d", | |
610 | ua_chan->name, app->key.pid, app->key.sock, | |
611 | ua_sess->handle, ret); | |
b551a063 DG |
612 | goto error; |
613 | } | |
614 | ||
5b4a0ec0 DG |
615 | ua_chan->handle = ua_chan->obj->handle; |
616 | ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; | |
617 | ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; | |
618 | ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; | |
b551a063 | 619 | |
5b4a0ec0 DG |
620 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
621 | ua_chan->name, app->key.pid, app->key.sock); | |
b551a063 | 622 | |
8535a6d9 DG |
623 | /* If channel is not enabled, disable it on the tracer */ |
624 | if (!ua_chan->enabled) { | |
625 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
626 | if (ret < 0) { | |
627 | goto error; | |
628 | } | |
629 | } | |
630 | ||
b551a063 DG |
631 | error: |
632 | return ret; | |
633 | } | |
634 | ||
91d76f53 | 635 | /* |
5b4a0ec0 | 636 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 637 | */ |
edb67388 DG |
638 | static |
639 | int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess, | |
640 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event) | |
91d76f53 | 641 | { |
5b4a0ec0 | 642 | int ret = 0; |
284d8f55 | 643 | |
5b4a0ec0 DG |
644 | /* Create UST event on tracer */ |
645 | ret = ustctl_create_event(app->key.sock, &ua_event->attr, ua_chan->obj, | |
646 | &ua_event->obj); | |
647 | if (ret < 0) { | |
648 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
649 | ua_event->attr.name, app->key.pid, ret); | |
650 | goto error; | |
91d76f53 | 651 | } |
f6a9efaa | 652 | |
5b4a0ec0 | 653 | ua_event->handle = ua_event->obj->handle; |
284d8f55 | 654 | |
5b4a0ec0 DG |
655 | DBG2("UST app event %s created successfully for pid:%d", |
656 | ua_event->attr.name, app->key.pid); | |
f6a9efaa | 657 | |
8535a6d9 DG |
658 | /* If event not enabled, disable it on the tracer */ |
659 | if (!ua_event->enabled) { | |
660 | ret = disable_ust_event(app, ua_sess, ua_event); | |
661 | if (ret < 0) { | |
662 | goto error; | |
663 | } | |
664 | } | |
665 | ||
5b4a0ec0 DG |
666 | error: |
667 | return ret; | |
91d76f53 | 668 | } |
48842b30 | 669 | |
5b4a0ec0 DG |
670 | /* |
671 | * Copy data between an UST app event and a LTT event. | |
672 | */ | |
421cb601 | 673 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
674 | struct ltt_ust_event *uevent) |
675 | { | |
55cc08a6 DG |
676 | struct cds_lfht_iter iter; |
677 | struct ltt_ust_context *uctx; | |
678 | struct ust_app_ctx *ua_ctx; | |
679 | ||
48842b30 DG |
680 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); |
681 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
682 | ||
5b4a0ec0 DG |
683 | /* Copy event attributes */ |
684 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
685 | ||
55cc08a6 DG |
686 | cds_lfht_for_each_entry(uevent->ctx, &iter, uctx, node) { |
687 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); | |
688 | if (ua_ctx == NULL) { | |
689 | continue; | |
690 | } | |
691 | hashtable_node_init(&ua_ctx->node, | |
692 | (void *)((unsigned long) ua_ctx->ctx.ctx), sizeof(void *)); | |
693 | hashtable_add_unique(ua_event->ctx, &ua_ctx->node); | |
694 | } | |
48842b30 DG |
695 | } |
696 | ||
5b4a0ec0 DG |
697 | /* |
698 | * Copy data between an UST app channel and a LTT channel. | |
699 | */ | |
421cb601 | 700 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
701 | struct ltt_ust_channel *uchan) |
702 | { | |
703 | struct cds_lfht_iter iter; | |
5b4a0ec0 | 704 | struct cds_lfht_node *ua_event_node; |
48842b30 | 705 | struct ltt_ust_event *uevent; |
55cc08a6 | 706 | struct ltt_ust_context *uctx; |
48842b30 | 707 | struct ust_app_event *ua_event; |
55cc08a6 | 708 | struct ust_app_ctx *ua_ctx; |
48842b30 | 709 | |
421cb601 | 710 | DBG2("Shadow copy of UST app channel %s", ua_chan->name); |
48842b30 DG |
711 | |
712 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
713 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
714 | /* Copy event attributes */ |
715 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 | 716 | |
55cc08a6 DG |
717 | cds_lfht_for_each_entry(uchan->ctx, &iter, uctx, node) { |
718 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); | |
719 | if (ua_ctx == NULL) { | |
720 | continue; | |
721 | } | |
722 | hashtable_node_init(&ua_ctx->node, | |
723 | (void *)((unsigned long) ua_ctx->ctx.ctx), sizeof(void *)); | |
724 | hashtable_add_unique(ua_chan->ctx, &ua_ctx->node); | |
725 | } | |
48842b30 | 726 | |
421cb601 | 727 | /* Copy all events from ltt ust channel to ust app channel */ |
5b4a0ec0 | 728 | cds_lfht_for_each_entry(uchan->events, &iter, uevent, node) { |
ba767faf MD |
729 | struct cds_lfht_iter uiter; |
730 | ||
48842b30 | 731 | ua_event_node = hashtable_lookup(ua_chan->events, |
ba767faf MD |
732 | (void *) uevent->attr.name, strlen(uevent->attr.name), |
733 | &uiter); | |
48842b30 | 734 | if (ua_event_node == NULL) { |
421cb601 | 735 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 736 | uevent->attr.name); |
284d8f55 | 737 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 738 | if (ua_event == NULL) { |
5b4a0ec0 | 739 | continue; |
48842b30 | 740 | } |
421cb601 | 741 | shadow_copy_event(ua_event, uevent); |
48842b30 | 742 | hashtable_add_unique(ua_chan->events, &ua_event->node); |
48842b30 | 743 | } |
48842b30 DG |
744 | } |
745 | ||
421cb601 | 746 | DBG3("Shadow copy channel done"); |
48842b30 DG |
747 | } |
748 | ||
5b4a0ec0 DG |
749 | /* |
750 | * Copy data between a UST app session and a regular LTT session. | |
751 | */ | |
421cb601 | 752 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
477d7741 MD |
753 | struct ltt_ust_session *usess, |
754 | struct ust_app *app) | |
48842b30 | 755 | { |
5b4a0ec0 | 756 | struct cds_lfht_node *ua_chan_node; |
48842b30 DG |
757 | struct cds_lfht_iter iter; |
758 | struct ltt_ust_channel *uchan; | |
759 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
760 | time_t rawtime; |
761 | struct tm *timeinfo; | |
762 | char datetime[16]; | |
763 | int ret; | |
764 | ||
765 | /* Get date and time for unique app path */ | |
766 | time(&rawtime); | |
767 | timeinfo = localtime(&rawtime); | |
768 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 769 | |
421cb601 | 770 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 DG |
771 | |
772 | ua_sess->uid = usess->uid; | |
773 | ||
477d7741 MD |
774 | ret = snprintf(ua_sess->path, PATH_MAX, |
775 | "%s/%s-%d-%s", | |
776 | usess->pathname, app->name, app->key.pid, | |
777 | datetime); | |
778 | if (ret < 0) { | |
779 | PERROR("asprintf UST shadow copy session"); | |
780 | /* TODO: We cannot return an error from here.. */ | |
781 | assert(0); | |
782 | } | |
783 | ||
48842b30 DG |
784 | /* TODO: support all UST domain */ |
785 | ||
786 | /* Iterate over all channels in global domain. */ | |
5b4a0ec0 DG |
787 | cds_lfht_for_each_entry(usess->domain_global.channels, &iter, |
788 | uchan, node) { | |
ba767faf MD |
789 | struct cds_lfht_iter uiter; |
790 | ||
48842b30 | 791 | ua_chan_node = hashtable_lookup(ua_sess->channels, |
ba767faf MD |
792 | (void *)uchan->name, strlen(uchan->name), |
793 | &uiter); | |
5b4a0ec0 DG |
794 | if (ua_chan_node != NULL) { |
795 | continue; | |
796 | } | |
421cb601 | 797 | |
5b4a0ec0 DG |
798 | DBG2("Channel %s not found on shadow session copy, creating it", |
799 | uchan->name); | |
800 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
801 | if (ua_chan == NULL) { | |
802 | /* malloc failed... continuing */ | |
803 | continue; | |
48842b30 DG |
804 | } |
805 | ||
5b4a0ec0 DG |
806 | shadow_copy_channel(ua_chan, uchan); |
807 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
48842b30 DG |
808 | } |
809 | } | |
810 | ||
78f0bacd DG |
811 | /* |
812 | * Lookup sesison wrapper. | |
813 | */ | |
84cd17c6 MD |
814 | static |
815 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
816 | struct ust_app *app, struct cds_lfht_iter *iter) | |
817 | { | |
818 | /* Get right UST app session from app */ | |
819 | (void) hashtable_lookup(app->sessions, | |
820 | (void *) ((unsigned long) usess->uid), sizeof(void *), | |
821 | iter); | |
822 | } | |
823 | ||
421cb601 DG |
824 | /* |
825 | * Return ust app session from the app session hashtable using the UST session | |
826 | * uid. | |
827 | */ | |
48842b30 DG |
828 | static struct ust_app_session *lookup_session_by_app( |
829 | struct ltt_ust_session *usess, struct ust_app *app) | |
830 | { | |
831 | struct cds_lfht_iter iter; | |
832 | struct cds_lfht_node *node; | |
833 | ||
84cd17c6 MD |
834 | __lookup_session_by_app(usess, app, &iter); |
835 | node = hashtable_iter_get_node(&iter); | |
48842b30 DG |
836 | if (node == NULL) { |
837 | goto error; | |
838 | } | |
839 | ||
840 | return caa_container_of(node, struct ust_app_session, node); | |
841 | ||
842 | error: | |
843 | return NULL; | |
844 | } | |
845 | ||
421cb601 DG |
846 | /* |
847 | * Create a UST session onto the tracer of app and add it the session | |
848 | * hashtable. | |
849 | * | |
850 | * Return ust app session or NULL on error. | |
851 | */ | |
852 | static struct ust_app_session *create_ust_app_session( | |
853 | struct ltt_ust_session *usess, struct ust_app *app) | |
854 | { | |
855 | int ret; | |
856 | struct ust_app_session *ua_sess; | |
857 | ||
858 | ua_sess = lookup_session_by_app(usess, app); | |
859 | if (ua_sess == NULL) { | |
860 | DBG2("UST app pid: %d session uid %d not found, creating it", | |
861 | app->key.pid, usess->uid); | |
862 | ua_sess = alloc_ust_app_session(); | |
863 | if (ua_sess == NULL) { | |
864 | /* Only malloc can failed so something is really wrong */ | |
865 | goto error; | |
866 | } | |
477d7741 | 867 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
868 | } |
869 | ||
870 | if (ua_sess->handle == -1) { | |
871 | ret = ustctl_create_session(app->key.sock); | |
872 | if (ret < 0) { | |
873 | ERR("Error creating session for app pid %d, sock %d", | |
874 | app->key.pid, app->key.sock); | |
875 | /* TODO: free() ua_sess */ | |
876 | goto error; | |
877 | } | |
878 | ||
879 | DBG2("UST app ustctl create session handle %d", ret); | |
880 | ua_sess->handle = ret; | |
881 | ||
882 | /* Add ust app session to app's HT */ | |
883 | hashtable_node_init(&ua_sess->node, | |
884 | (void *)((unsigned long) ua_sess->uid), sizeof(void *)); | |
885 | hashtable_add_unique(app->sessions, &ua_sess->node); | |
886 | ||
887 | DBG2("UST app session created successfully with handle %d", ret); | |
888 | } | |
889 | ||
890 | return ua_sess; | |
891 | ||
892 | error: | |
893 | return NULL; | |
894 | } | |
895 | ||
55cc08a6 DG |
896 | /* |
897 | * Create a context for the channel on the tracer. | |
898 | */ | |
899 | static | |
900 | int create_ust_app_channel_context(struct ust_app_session *ua_sess, | |
901 | struct ust_app_channel *ua_chan, struct lttng_ust_context *uctx, | |
902 | struct ust_app *app) | |
903 | { | |
904 | int ret = 0; | |
905 | struct cds_lfht_iter iter; | |
906 | struct cds_lfht_node *node; | |
907 | struct ust_app_ctx *ua_ctx; | |
908 | ||
909 | DBG2("UST app adding context to channel %s", ua_chan->name); | |
910 | ||
911 | node = hashtable_lookup(ua_chan->ctx, (void *)((unsigned long)uctx->ctx), | |
912 | sizeof(void *), &iter); | |
913 | if (node != NULL) { | |
914 | ret = -EEXIST; | |
915 | goto error; | |
916 | } | |
917 | ||
918 | ua_ctx = alloc_ust_app_ctx(uctx); | |
919 | if (ua_ctx == NULL) { | |
920 | /* malloc failed */ | |
921 | ret = -1; | |
922 | goto error; | |
923 | } | |
924 | ||
925 | hashtable_node_init(&ua_ctx->node, | |
926 | (void *)((unsigned long) ua_ctx->ctx.ctx), sizeof(void *)); | |
927 | hashtable_add_unique(ua_chan->ctx, &ua_ctx->node); | |
928 | ||
929 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
930 | if (ret < 0) { | |
931 | goto error; | |
932 | } | |
933 | ||
934 | error: | |
935 | return ret; | |
936 | } | |
937 | ||
938 | /* | |
939 | * Create an UST context and enable it for the event on the tracer. | |
940 | */ | |
941 | static | |
942 | int create_ust_app_event_context(struct ust_app_session *ua_sess, | |
943 | struct ust_app_event *ua_event, struct lttng_ust_context *uctx, | |
944 | struct ust_app *app) | |
945 | { | |
946 | int ret = 0; | |
947 | struct cds_lfht_iter iter; | |
948 | struct cds_lfht_node *node; | |
949 | struct ust_app_ctx *ua_ctx; | |
950 | ||
951 | DBG2("UST app adding context to event %s", ua_event->name); | |
952 | ||
953 | node = hashtable_lookup(ua_event->ctx, (void *)((unsigned long)uctx->ctx), | |
954 | sizeof(void *), &iter); | |
955 | if (node != NULL) { | |
956 | ret = -EEXIST; | |
957 | goto error; | |
958 | } | |
959 | ||
960 | ua_ctx = alloc_ust_app_ctx(uctx); | |
961 | if (ua_ctx == NULL) { | |
962 | /* malloc failed */ | |
963 | ret = -1; | |
964 | goto error; | |
965 | } | |
966 | ||
967 | hashtable_node_init(&ua_ctx->node, | |
968 | (void *)((unsigned long) ua_ctx->ctx.ctx), sizeof(void *)); | |
969 | hashtable_add_unique(ua_event->ctx, &ua_ctx->node); | |
970 | ||
971 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
972 | if (ret < 0) { | |
973 | goto error; | |
974 | } | |
975 | ||
976 | error: | |
977 | return ret; | |
978 | } | |
979 | ||
edb67388 DG |
980 | /* |
981 | * Enable on the tracer side a ust app event for the session and channel. | |
982 | */ | |
983 | static | |
984 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 985 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
986 | { |
987 | int ret; | |
988 | ||
989 | ret = enable_ust_event(app, ua_sess, ua_event); | |
990 | if (ret < 0) { | |
991 | goto error; | |
992 | } | |
993 | ||
994 | ua_event->enabled = 1; | |
995 | ||
996 | error: | |
997 | return ret; | |
998 | } | |
999 | ||
9730260e DG |
1000 | /* |
1001 | * Disable on the tracer side a ust app event for the session and channel. | |
1002 | */ | |
1003 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
7f79d3a1 | 1004 | struct ust_app_event *ua_event, struct ust_app *app) |
9730260e DG |
1005 | { |
1006 | int ret; | |
1007 | ||
1008 | ret = disable_ust_event(app, ua_sess, ua_event); | |
1009 | if (ret < 0) { | |
1010 | goto error; | |
1011 | } | |
1012 | ||
1013 | ua_event->enabled = 0; | |
1014 | ||
1015 | error: | |
1016 | return ret; | |
1017 | } | |
1018 | ||
78f0bacd DG |
1019 | /* |
1020 | * Lookup ust app channel for session and disable it on the tracer side. | |
1021 | */ | |
8535a6d9 DG |
1022 | static |
1023 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
1024 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 1025 | { |
8535a6d9 | 1026 | int ret; |
78f0bacd DG |
1027 | |
1028 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
1029 | if (ret < 0) { | |
1030 | goto error; | |
1031 | } | |
1032 | ||
8535a6d9 DG |
1033 | ua_chan->enabled = 0; |
1034 | ||
78f0bacd DG |
1035 | error: |
1036 | return ret; | |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * Lookup ust app channel for session and enable it on the tracer side. | |
1041 | */ | |
1042 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
1043 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
1044 | { | |
1045 | int ret = 0; | |
1046 | struct cds_lfht_iter iter; | |
1047 | struct cds_lfht_node *ua_chan_node; | |
1048 | struct ust_app_channel *ua_chan; | |
1049 | ||
1050 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
1051 | (void *)uchan->name, strlen(uchan->name), &iter); | |
1052 | if (ua_chan_node == NULL) { | |
1053 | DBG2("Unable to find channel %s in ust session uid %u", | |
1054 | uchan->name, ua_sess->uid); | |
1055 | goto error; | |
1056 | } | |
1057 | ||
1058 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1059 | ||
1060 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
1061 | if (ret < 0) { | |
1062 | goto error; | |
1063 | } | |
1064 | ||
1065 | error: | |
1066 | return ret; | |
1067 | } | |
1068 | ||
284d8f55 | 1069 | /* |
5b4a0ec0 | 1070 | * Create UST app channel and create it on the tracer. |
284d8f55 | 1071 | */ |
5b4a0ec0 DG |
1072 | static struct ust_app_channel *create_ust_app_channel( |
1073 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
1074 | struct ust_app *app) | |
1075 | { | |
1076 | int ret = 0; | |
1077 | struct cds_lfht_iter iter; | |
1078 | struct cds_lfht_node *ua_chan_node; | |
1079 | struct ust_app_channel *ua_chan; | |
1080 | ||
1081 | /* Lookup channel in the ust app session */ | |
1082 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
1083 | (void *)uchan->name, strlen(uchan->name), &iter); | |
1084 | if (ua_chan_node == NULL) { | |
1085 | DBG2("Unable to find channel %s in ust session uid %u", | |
1086 | uchan->name, ua_sess->uid); | |
1087 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
1088 | if (ua_chan == NULL) { | |
1089 | goto error; | |
1090 | } | |
1091 | shadow_copy_channel(ua_chan, uchan); | |
1092 | ||
1093 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
1094 | } else { | |
1095 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1096 | } | |
1097 | ||
1098 | ret = create_ust_channel(app, ua_sess, ua_chan); | |
1099 | if (ret < 0) { | |
1100 | goto error; | |
1101 | } | |
1102 | ||
1103 | return ua_chan; | |
1104 | ||
1105 | error: | |
1106 | return NULL; | |
1107 | } | |
1108 | ||
1109 | /* | |
1110 | * Create UST app event and create it on the tracer side. | |
1111 | */ | |
edb67388 DG |
1112 | static |
1113 | int create_ust_app_event(struct ust_app_session *ua_sess, | |
1114 | struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent, | |
1115 | struct ust_app *app) | |
284d8f55 | 1116 | { |
edb67388 | 1117 | int ret = 0; |
5b4a0ec0 DG |
1118 | struct cds_lfht_iter iter; |
1119 | struct cds_lfht_node *ua_event_node; | |
1120 | struct ust_app_event *ua_event; | |
284d8f55 | 1121 | |
5b4a0ec0 DG |
1122 | /* Get event node */ |
1123 | ua_event_node = hashtable_lookup(ua_chan->events, | |
1124 | (void *)uevent->attr.name, strlen(uevent->attr.name), &iter); | |
edb67388 DG |
1125 | if (ua_event_node != NULL) { |
1126 | ERR("UST app event %s already exist. Stopping creation.", | |
1127 | uevent->attr.name); | |
1128 | goto end; | |
1129 | } | |
5b4a0ec0 | 1130 | |
edb67388 DG |
1131 | /* Does not exist so create one */ |
1132 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
1133 | if (ua_event == NULL) { | |
1134 | /* Only malloc can failed so something is really wrong */ | |
1135 | ret = -ENOMEM; | |
1136 | goto error; | |
5b4a0ec0 | 1137 | } |
edb67388 | 1138 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 1139 | |
edb67388 | 1140 | /* Create it on the tracer side */ |
5b4a0ec0 | 1141 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 1142 | if (ret < 0) { |
e5abf1bf | 1143 | rcu_read_lock(); |
edb67388 | 1144 | delete_ust_app_event(app->key.sock, ua_event); |
e5abf1bf | 1145 | rcu_read_unlock(); |
284d8f55 DG |
1146 | goto error; |
1147 | } | |
1148 | ||
8535a6d9 DG |
1149 | ua_event->enabled = 1; |
1150 | ||
edb67388 | 1151 | hashtable_add_unique(ua_chan->events, &ua_event->node); |
284d8f55 | 1152 | |
7f79d3a1 DG |
1153 | DBG2("UST app create event %s for PID %d completed", |
1154 | ua_event->name, app->key.pid); | |
1155 | ||
edb67388 | 1156 | end: |
5b4a0ec0 | 1157 | error: |
edb67388 | 1158 | return ret; |
5b4a0ec0 DG |
1159 | } |
1160 | ||
1161 | /* | |
1162 | * Create UST metadata and open it on the tracer side. | |
1163 | */ | |
1164 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
1165 | char *pathname, struct ust_app *app) | |
1166 | { | |
1167 | int ret = 0; | |
67e40797 | 1168 | mode_t old_umask; |
5b4a0ec0 DG |
1169 | |
1170 | if (ua_sess->metadata == NULL) { | |
1171 | /* Allocate UST metadata */ | |
1172 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
1173 | if (ua_sess->metadata == NULL) { | |
1174 | ERR("UST app session %d creating metadata failed", | |
1175 | ua_sess->handle); | |
1176 | goto error; | |
1177 | } | |
1178 | ||
1179 | ret = open_ust_metadata(app, ua_sess); | |
1180 | if (ret < 0) { | |
1181 | goto error; | |
1182 | } | |
1183 | ||
1184 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
1185 | } | |
1186 | ||
1187 | /* Open UST metadata stream */ | |
1188 | if (ua_sess->metadata->stream_obj == NULL) { | |
1189 | ret = create_ust_stream(app, ua_sess); | |
1190 | if (ret < 0) { | |
1191 | goto error; | |
1192 | } | |
1193 | ||
67e40797 | 1194 | old_umask = umask(0); |
477d7741 | 1195 | ret = mkdir(ua_sess->path, S_IRWXU | S_IRWXG); |
5b4a0ec0 DG |
1196 | if (ret < 0) { |
1197 | PERROR("mkdir UST metadata"); | |
1198 | goto error; | |
1199 | } | |
67e40797 | 1200 | umask(old_umask); |
5b4a0ec0 | 1201 | |
477d7741 MD |
1202 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
1203 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
1204 | if (ret < 0) { |
1205 | PERROR("asprintf UST create stream"); | |
1206 | goto error; | |
1207 | } | |
1208 | ||
1209 | DBG2("UST metadata stream object created for app pid %d", | |
1210 | app->key.pid); | |
1211 | } else { | |
1212 | ERR("Attempting to create stream without metadata opened"); | |
1213 | goto error; | |
1214 | } | |
1215 | ||
1216 | return 0; | |
1217 | ||
1218 | error: | |
1219 | return -1; | |
1220 | } | |
1221 | ||
1222 | /* | |
1223 | * Return pointer to traceable apps list. | |
1224 | */ | |
1225 | struct cds_lfht *ust_app_get_ht(void) | |
1226 | { | |
1227 | return ust_app_ht; | |
1228 | } | |
1229 | ||
1230 | /* | |
1231 | * Return ust app pointer or NULL if not found. | |
1232 | */ | |
1233 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
1234 | { | |
1235 | struct cds_lfht_node *node; | |
1236 | struct cds_lfht_iter iter; | |
1237 | ||
1238 | rcu_read_lock(); | |
1239 | node = hashtable_lookup(ust_app_ht, | |
1240 | (void *)((unsigned long) pid), sizeof(void *), &iter); | |
1241 | if (node == NULL) { | |
1242 | DBG2("UST app no found with pid %d", pid); | |
1243 | goto error; | |
1244 | } | |
1245 | rcu_read_unlock(); | |
1246 | ||
1247 | DBG2("Found UST app by pid %d", pid); | |
1248 | ||
1249 | return caa_container_of(node, struct ust_app, node); | |
1250 | ||
1251 | error: | |
1252 | rcu_read_unlock(); | |
1253 | return NULL; | |
1254 | } | |
1255 | ||
1256 | /* | |
1257 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
1258 | * add it to the global traceable app list. | |
1259 | * | |
0df502fd MD |
1260 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
1261 | * bitness is not supported. | |
5b4a0ec0 DG |
1262 | */ |
1263 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
1264 | { | |
1265 | struct ust_app *lta; | |
1266 | ||
7753dea8 MD |
1267 | if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL) |
1268 | || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) { | |
f943b0fb | 1269 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1270 | "%d-bit long, but no consumerd for this long size is available.\n", |
1271 | msg->name, msg->pid, msg->bits_per_long); | |
88ff5b7f | 1272 | close(sock); |
0df502fd MD |
1273 | return -EINVAL; |
1274 | } | |
5b4a0ec0 DG |
1275 | lta = zmalloc(sizeof(struct ust_app)); |
1276 | if (lta == NULL) { | |
1277 | PERROR("malloc"); | |
1278 | return -ENOMEM; | |
1279 | } | |
1280 | ||
1281 | lta->ppid = msg->ppid; | |
1282 | lta->uid = msg->uid; | |
1283 | lta->gid = msg->gid; | |
7753dea8 | 1284 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1285 | lta->v_major = msg->major; |
1286 | lta->v_minor = msg->minor; | |
1287 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1288 | lta->name[16] = '\0'; | |
1289 | lta->sessions = hashtable_new(0); | |
1290 | ||
1291 | /* Set key map */ | |
1292 | lta->key.pid = msg->pid; | |
1293 | hashtable_node_init(<a->node, (void *)((unsigned long)lta->key.pid), | |
1294 | sizeof(void *)); | |
1295 | lta->key.sock = sock; | |
1296 | hashtable_node_init(<a->key.node, (void *)((unsigned long)lta->key.sock), | |
1297 | sizeof(void *)); | |
1298 | ||
1299 | rcu_read_lock(); | |
1300 | hashtable_add_unique(ust_app_sock_key_map, <a->key.node); | |
1301 | hashtable_add_unique(ust_app_ht, <a->node); | |
1302 | rcu_read_unlock(); | |
1303 | ||
1304 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
1305 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, | |
1306 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
1307 | ||
1308 | return 0; | |
1309 | } | |
1310 | ||
1311 | /* | |
1312 | * Unregister app by removing it from the global traceable app list and freeing | |
1313 | * the data struct. | |
1314 | * | |
1315 | * The socket is already closed at this point so no close to sock. | |
1316 | */ | |
1317 | void ust_app_unregister(int sock) | |
1318 | { | |
1319 | struct ust_app *lta; | |
1320 | struct cds_lfht_node *node; | |
1321 | struct cds_lfht_iter iter; | |
525b0740 | 1322 | int ret; |
5b4a0ec0 DG |
1323 | |
1324 | rcu_read_lock(); | |
1325 | lta = find_app_by_sock(sock); | |
1326 | if (lta == NULL) { | |
1327 | ERR("Unregister app sock %d not found!", sock); | |
1328 | goto error; | |
1329 | } | |
1330 | ||
1331 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
1332 | ||
1333 | /* Get the node reference for a call_rcu */ | |
1334 | node = hashtable_lookup(ust_app_ht, | |
1335 | (void *)((unsigned long) lta->key.pid), sizeof(void *), &iter); | |
1336 | if (node == NULL) { | |
1337 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
1338 | goto error; | |
1339 | } | |
284d8f55 | 1340 | |
525b0740 MD |
1341 | ret = hashtable_del(ust_app_ht, &iter); |
1342 | assert(!ret); | |
5b4a0ec0 | 1343 | call_rcu(&node->head, delete_ust_app_rcu); |
284d8f55 | 1344 | error: |
5b4a0ec0 DG |
1345 | rcu_read_unlock(); |
1346 | return; | |
284d8f55 DG |
1347 | } |
1348 | ||
1349 | /* | |
5b4a0ec0 | 1350 | * Return traceable_app_count |
284d8f55 | 1351 | */ |
5b4a0ec0 | 1352 | unsigned long ust_app_list_count(void) |
284d8f55 | 1353 | { |
5b4a0ec0 | 1354 | unsigned long count; |
284d8f55 | 1355 | |
5b4a0ec0 DG |
1356 | rcu_read_lock(); |
1357 | count = hashtable_get_count(ust_app_ht); | |
1358 | rcu_read_unlock(); | |
284d8f55 | 1359 | |
5b4a0ec0 | 1360 | return count; |
284d8f55 DG |
1361 | } |
1362 | ||
5b4a0ec0 DG |
1363 | /* |
1364 | * Fill events array with all events name of all registered apps. | |
1365 | */ | |
1366 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1367 | { |
5b4a0ec0 DG |
1368 | int ret, handle; |
1369 | size_t nbmem, count = 0; | |
421cb601 | 1370 | struct cds_lfht_iter iter; |
5b4a0ec0 DG |
1371 | struct ust_app *app; |
1372 | struct lttng_event *tmp; | |
421cb601 | 1373 | |
5b4a0ec0 DG |
1374 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1375 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1376 | if (tmp == NULL) { | |
1377 | PERROR("zmalloc ust app events"); | |
1378 | ret = -ENOMEM; | |
421cb601 DG |
1379 | goto error; |
1380 | } | |
1381 | ||
5b4a0ec0 | 1382 | rcu_read_lock(); |
421cb601 | 1383 | |
5b4a0ec0 | 1384 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
ac3bd9c0 MD |
1385 | struct lttng_ust_tracepoint_iter iter; |
1386 | ||
5b4a0ec0 DG |
1387 | handle = ustctl_tracepoint_list(app->key.sock); |
1388 | if (handle < 0) { | |
1389 | ERR("UST app list events getting handle failed for app pid %d", | |
1390 | app->key.pid); | |
1391 | continue; | |
1392 | } | |
421cb601 | 1393 | |
5b4a0ec0 | 1394 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, |
ac3bd9c0 | 1395 | &iter)) != -ENOENT) { |
815564d8 MD |
1396 | if (count >= nbmem) { |
1397 | DBG2("Reallocating event list from %zu to %zu entries", nbmem, | |
1398 | 2 * nbmem); | |
1399 | nbmem *= 2; | |
2f221590 | 1400 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event)); |
5b4a0ec0 DG |
1401 | if (tmp == NULL) { |
1402 | PERROR("realloc ust app events"); | |
1403 | ret = -ENOMEM; | |
1404 | goto rcu_error; | |
1405 | } | |
1406 | } | |
815564d8 | 1407 | memcpy(tmp[count].name, iter.name, LTTNG_UST_SYM_NAME_LEN); |
81afa345 | 1408 | memcpy(tmp[count].loglevel, iter.loglevel, LTTNG_UST_SYM_NAME_LEN); |
e4baff1e | 1409 | tmp[count].loglevel_value = iter.loglevel_value; |
5b4a0ec0 DG |
1410 | tmp[count].type = LTTNG_UST_TRACEPOINT; |
1411 | tmp[count].pid = app->key.pid; | |
1412 | tmp[count].enabled = -1; | |
1413 | count++; | |
421cb601 | 1414 | } |
421cb601 DG |
1415 | } |
1416 | ||
5b4a0ec0 DG |
1417 | ret = count; |
1418 | *events = tmp; | |
421cb601 | 1419 | |
5b4a0ec0 | 1420 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1421 | |
5b4a0ec0 DG |
1422 | rcu_error: |
1423 | rcu_read_unlock(); | |
421cb601 | 1424 | error: |
5b4a0ec0 | 1425 | return ret; |
421cb601 DG |
1426 | } |
1427 | ||
5b4a0ec0 DG |
1428 | /* |
1429 | * Free and clean all traceable apps of the global list. | |
1430 | */ | |
1431 | void ust_app_clean_list(void) | |
421cb601 | 1432 | { |
5b4a0ec0 | 1433 | int ret; |
5b4a0ec0 DG |
1434 | struct cds_lfht_iter iter; |
1435 | struct ust_app *app; | |
421cb601 | 1436 | |
5b4a0ec0 | 1437 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1438 | |
5b4a0ec0 | 1439 | rcu_read_lock(); |
421cb601 | 1440 | |
778ca3dd | 1441 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
5b4a0ec0 | 1442 | ret = hashtable_del(ust_app_ht, &iter); |
525b0740 | 1443 | assert(!ret); |
0d5d001d | 1444 | call_rcu(&iter.node->head, delete_ust_app_rcu); |
421cb601 DG |
1445 | } |
1446 | ||
5b4a0ec0 DG |
1447 | hashtable_destroy(ust_app_ht); |
1448 | hashtable_destroy(ust_app_sock_key_map); | |
421cb601 | 1449 | |
5b4a0ec0 DG |
1450 | rcu_read_unlock(); |
1451 | } | |
1452 | ||
1453 | /* | |
1454 | * Init UST app hash table. | |
1455 | */ | |
1456 | void ust_app_ht_alloc(void) | |
1457 | { | |
1458 | ust_app_ht = hashtable_new(0); | |
1459 | ust_app_sock_key_map = hashtable_new(0); | |
421cb601 DG |
1460 | } |
1461 | ||
78f0bacd DG |
1462 | /* |
1463 | * For a specific UST session, disable the channel for all registered apps. | |
1464 | */ | |
35a9059d | 1465 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1466 | struct ltt_ust_channel *uchan) |
1467 | { | |
1468 | int ret = 0; | |
1469 | struct cds_lfht_iter iter; | |
8535a6d9 | 1470 | struct cds_lfht_node *ua_chan_node; |
78f0bacd DG |
1471 | struct ust_app *app; |
1472 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1473 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1474 | |
1475 | if (usess == NULL || uchan == NULL) { | |
1476 | ERR("Disabling UST global channel with NULL values"); | |
1477 | ret = -1; | |
1478 | goto error; | |
1479 | } | |
1480 | ||
8535a6d9 | 1481 | DBG2("UST app disabling channel %s from global domain for session uid %d", |
78f0bacd DG |
1482 | uchan->name, usess->uid); |
1483 | ||
1484 | rcu_read_lock(); | |
1485 | ||
1486 | /* For every registered applications */ | |
1487 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1488 | ua_sess = lookup_session_by_app(usess, app); | |
1489 | if (ua_sess == NULL) { | |
1490 | continue; | |
1491 | } | |
1492 | ||
8535a6d9 DG |
1493 | /* Get channel */ |
1494 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
1495 | (void *)uchan->name, strlen(uchan->name), &iter); | |
1496 | /* If the session if found for the app, the channel must be there */ | |
1497 | assert(ua_chan_node); | |
1498 | ||
1499 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1500 | /* The channel must not be already disabled */ | |
1501 | assert(ua_chan->enabled == 1); | |
1502 | ||
1503 | /* Disable channel onto application */ | |
1504 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1505 | if (ret < 0) { |
1506 | /* XXX: We might want to report this error at some point... */ | |
1507 | continue; | |
1508 | } | |
1509 | } | |
1510 | ||
1511 | rcu_read_unlock(); | |
1512 | ||
1513 | error: | |
1514 | return ret; | |
1515 | } | |
1516 | ||
1517 | /* | |
1518 | * For a specific UST session, enable the channel for all registered apps. | |
1519 | */ | |
35a9059d | 1520 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1521 | struct ltt_ust_channel *uchan) |
1522 | { | |
1523 | int ret = 0; | |
1524 | struct cds_lfht_iter iter; | |
1525 | struct ust_app *app; | |
1526 | struct ust_app_session *ua_sess; | |
1527 | ||
1528 | if (usess == NULL || uchan == NULL) { | |
1529 | ERR("Adding UST global channel to NULL values"); | |
1530 | ret = -1; | |
1531 | goto error; | |
1532 | } | |
1533 | ||
1534 | DBG2("UST app enabling channel %s to global domain for session uid %d", | |
1535 | uchan->name, usess->uid); | |
1536 | ||
1537 | rcu_read_lock(); | |
1538 | ||
1539 | /* For every registered applications */ | |
1540 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1541 | ua_sess = lookup_session_by_app(usess, app); | |
1542 | if (ua_sess == NULL) { | |
1543 | continue; | |
1544 | } | |
1545 | ||
1546 | /* Enable channel onto application */ | |
1547 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1548 | if (ret < 0) { | |
1549 | /* XXX: We might want to report this error at some point... */ | |
1550 | continue; | |
1551 | } | |
1552 | } | |
1553 | ||
1554 | rcu_read_unlock(); | |
1555 | ||
1556 | error: | |
1557 | return ret; | |
1558 | } | |
1559 | ||
b0a40d28 DG |
1560 | /* |
1561 | * Disable an event in a channel and for a specific session. | |
1562 | */ | |
35a9059d DG |
1563 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
1564 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
1565 | { |
1566 | int ret = 0; | |
1567 | struct cds_lfht_iter iter, uiter; | |
1568 | struct cds_lfht_node *ua_chan_node, *ua_event_node; | |
1569 | struct ust_app *app; | |
1570 | struct ust_app_session *ua_sess; | |
1571 | struct ust_app_channel *ua_chan; | |
1572 | struct ust_app_event *ua_event; | |
1573 | ||
1574 | DBG("UST app disabling event %s for all apps in channel " | |
35a9059d | 1575 | "%s for session uid %d", uevent->attr.name, uchan->name, usess->uid); |
b0a40d28 DG |
1576 | |
1577 | rcu_read_lock(); | |
1578 | ||
1579 | /* For all registered applications */ | |
1580 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1581 | ua_sess = lookup_session_by_app(usess, app); | |
1582 | if (ua_sess == NULL) { | |
1583 | /* Next app */ | |
1584 | continue; | |
1585 | } | |
1586 | ||
1587 | /* Lookup channel in the ust app session */ | |
1588 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
1589 | (void *)uchan->name, strlen(uchan->name), &uiter); | |
1590 | if (ua_chan_node == NULL) { | |
1591 | DBG2("Channel %s not found in session uid %d for app pid %d." | |
1592 | "Skipping", uchan->name, usess->uid, app->key.pid); | |
1593 | continue; | |
1594 | } | |
1595 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1596 | ||
1597 | ua_event_node = hashtable_lookup(ua_chan->events, | |
35a9059d | 1598 | (void *)uevent->attr.name, strlen(uevent->attr.name), &uiter); |
b0a40d28 DG |
1599 | if (ua_event_node == NULL) { |
1600 | DBG2("Event %s not found in channel %s for app pid %d." | |
35a9059d | 1601 | "Skipping", uevent->attr.name, uchan->name, app->key.pid); |
b0a40d28 DG |
1602 | continue; |
1603 | } | |
1604 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1605 | ||
7f79d3a1 | 1606 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
b0a40d28 DG |
1607 | if (ret < 0) { |
1608 | /* XXX: Report error someday... */ | |
1609 | continue; | |
1610 | } | |
1611 | } | |
1612 | ||
1613 | rcu_read_unlock(); | |
1614 | ||
1615 | return ret; | |
1616 | } | |
1617 | ||
9730260e | 1618 | /* |
edb67388 | 1619 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
1620 | * registered apps. |
1621 | */ | |
35a9059d | 1622 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
1623 | struct ltt_ust_channel *uchan) |
1624 | { | |
1625 | int ret = 0; | |
1626 | struct cds_lfht_iter iter, uiter; | |
1627 | struct cds_lfht_node *ua_chan_node; | |
1628 | struct ust_app *app; | |
1629 | struct ust_app_session *ua_sess; | |
1630 | struct ust_app_channel *ua_chan; | |
1631 | struct ust_app_event *ua_event; | |
1632 | ||
1633 | DBG("UST app disabling all event for all apps in channel " | |
1634 | "%s for session uid %d", uchan->name, usess->uid); | |
1635 | ||
1636 | rcu_read_lock(); | |
1637 | ||
1638 | /* For all registered applications */ | |
1639 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1640 | ua_sess = lookup_session_by_app(usess, app); | |
edb67388 DG |
1641 | /* If ua_sess is NULL, there is a code flow error */ |
1642 | assert(ua_sess); | |
9730260e DG |
1643 | |
1644 | /* Lookup channel in the ust app session */ | |
edb67388 DG |
1645 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, |
1646 | strlen(uchan->name), &uiter); | |
1647 | /* If the channel is not found, there is a code flow error */ | |
1648 | assert(ua_chan_node); | |
1649 | ||
9730260e DG |
1650 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1651 | ||
1652 | /* Disable each events of channel */ | |
1653 | cds_lfht_for_each_entry(ua_chan->events, &uiter, ua_event, node) { | |
7f79d3a1 | 1654 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
9730260e DG |
1655 | if (ret < 0) { |
1656 | /* XXX: Report error someday... */ | |
1657 | continue; | |
1658 | } | |
1659 | } | |
1660 | } | |
1661 | ||
1662 | rcu_read_unlock(); | |
1663 | ||
1664 | return ret; | |
1665 | } | |
1666 | ||
421cb601 | 1667 | /* |
5b4a0ec0 | 1668 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1669 | */ |
35a9059d | 1670 | int ust_app_create_channel_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1671 | struct ltt_ust_channel *uchan) |
1672 | { | |
1673 | int ret = 0; | |
1674 | struct cds_lfht_iter iter; | |
48842b30 DG |
1675 | struct ust_app *app; |
1676 | struct ust_app_session *ua_sess; | |
1677 | struct ust_app_channel *ua_chan; | |
1678 | ||
421cb601 DG |
1679 | if (usess == NULL || uchan == NULL) { |
1680 | ERR("Adding UST global channel to NULL values"); | |
1681 | ret = -1; | |
1682 | goto error; | |
1683 | } | |
1684 | ||
48842b30 DG |
1685 | DBG2("UST app adding channel %s to global domain for session uid %d", |
1686 | uchan->name, usess->uid); | |
1687 | ||
1688 | rcu_read_lock(); | |
421cb601 | 1689 | |
5b4a0ec0 DG |
1690 | /* For every registered applications */ |
1691 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
edb67388 DG |
1692 | /* |
1693 | * Create session on the tracer side and add it to app session HT. Note | |
1694 | * that if session exist, it will simply return a pointer to the ust | |
1695 | * app session. | |
1696 | */ | |
421cb601 | 1697 | ua_sess = create_ust_app_session(usess, app); |
509cbaf8 | 1698 | if (ua_sess == NULL) { |
5b4a0ec0 | 1699 | continue; |
48842b30 DG |
1700 | } |
1701 | ||
421cb601 DG |
1702 | /* Create channel onto application */ |
1703 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1704 | if (ua_chan == NULL) { | |
5b4a0ec0 | 1705 | continue; |
48842b30 | 1706 | } |
48842b30 | 1707 | } |
5b4a0ec0 | 1708 | |
48842b30 DG |
1709 | rcu_read_unlock(); |
1710 | ||
421cb601 | 1711 | error: |
48842b30 DG |
1712 | return ret; |
1713 | } | |
1714 | ||
5b4a0ec0 | 1715 | /* |
edb67388 | 1716 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 1717 | */ |
35a9059d | 1718 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1719 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1720 | { | |
1721 | int ret = 0; | |
edb67388 | 1722 | struct cds_lfht_iter iter, uiter; |
35a9059d | 1723 | struct cds_lfht_node *ua_chan_node, *ua_event_node; |
48842b30 DG |
1724 | struct ust_app *app; |
1725 | struct ust_app_session *ua_sess; | |
1726 | struct ust_app_channel *ua_chan; | |
1727 | struct ust_app_event *ua_event; | |
48842b30 | 1728 | |
edb67388 | 1729 | DBG("UST app enabling event %s for all apps for session uid %d", |
48842b30 DG |
1730 | uevent->attr.name, usess->uid); |
1731 | ||
edb67388 DG |
1732 | /* |
1733 | * NOTE: At this point, this function is called only if the session and | |
1734 | * channel passed are already created for all apps. and enabled on the | |
1735 | * tracer also. | |
1736 | */ | |
1737 | ||
48842b30 | 1738 | rcu_read_lock(); |
421cb601 DG |
1739 | |
1740 | /* For all registered applications */ | |
5b4a0ec0 | 1741 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
edb67388 DG |
1742 | ua_sess = lookup_session_by_app(usess, app); |
1743 | /* If ua_sess is NULL, there is a code flow error */ | |
1744 | assert(ua_sess); | |
ba767faf | 1745 | |
edb67388 DG |
1746 | /* Lookup channel in the ust app session */ |
1747 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, | |
1748 | strlen(uchan->name), &uiter); | |
1749 | /* If the channel is not found, there is a code flow error */ | |
1750 | assert(ua_chan_node); | |
1751 | ||
1752 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1753 | ||
7f79d3a1 | 1754 | ua_event_node = hashtable_lookup(ua_chan->events, |
35a9059d DG |
1755 | (void*)uevent->attr.name, strlen(uevent->attr.name), &uiter); |
1756 | if (ua_event_node == NULL) { | |
7f79d3a1 DG |
1757 | DBG3("UST app enable event %s not found for app PID %d." |
1758 | "Skipping app", uevent->attr.name, app->key.pid); | |
35a9059d DG |
1759 | continue; |
1760 | } | |
1761 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1762 | ||
1763 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
1764 | if (ret < 0) { | |
7f79d3a1 | 1765 | goto error; |
48842b30 | 1766 | } |
edb67388 DG |
1767 | } |
1768 | ||
7f79d3a1 | 1769 | error: |
edb67388 | 1770 | rcu_read_unlock(); |
edb67388 DG |
1771 | return ret; |
1772 | } | |
1773 | ||
1774 | /* | |
1775 | * For a specific existing UST session and UST channel, creates the event for | |
1776 | * all registered apps. | |
1777 | */ | |
35a9059d | 1778 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
1779 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1780 | { | |
1781 | int ret = 0; | |
1782 | struct cds_lfht_iter iter, uiter; | |
1783 | struct cds_lfht_node *ua_chan_node; | |
1784 | struct ust_app *app; | |
1785 | struct ust_app_session *ua_sess; | |
1786 | struct ust_app_channel *ua_chan; | |
1787 | ||
1788 | DBG("UST app creating event %s for all apps for session uid %d", | |
1789 | uevent->attr.name, usess->uid); | |
1790 | ||
1791 | /* | |
1792 | * NOTE: At this point, this function is called only if the session and | |
1793 | * channel passed are already created for all apps. and enabled on the | |
1794 | * tracer also. | |
1795 | */ | |
1796 | ||
1797 | rcu_read_lock(); | |
1798 | ||
1799 | /* For all registered applications */ | |
1800 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1801 | ua_sess = lookup_session_by_app(usess, app); | |
1802 | /* If ua_sess is NULL, there is a code flow error */ | |
1803 | assert(ua_sess); | |
48842b30 DG |
1804 | |
1805 | /* Lookup channel in the ust app session */ | |
edb67388 DG |
1806 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, |
1807 | strlen(uchan->name), &uiter); | |
1808 | /* If the channel is not found, there is a code flow error */ | |
1809 | assert(ua_chan_node); | |
1810 | ||
48842b30 DG |
1811 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1812 | ||
edb67388 DG |
1813 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1814 | if (ret < 0) { | |
5b4a0ec0 | 1815 | continue; |
48842b30 | 1816 | } |
48842b30 | 1817 | } |
5b4a0ec0 | 1818 | |
48842b30 DG |
1819 | rcu_read_unlock(); |
1820 | ||
1821 | return ret; | |
1822 | } | |
1823 | ||
5b4a0ec0 DG |
1824 | /* |
1825 | * Start tracing for a specific UST session and app. | |
1826 | */ | |
421cb601 | 1827 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1828 | { |
1829 | int ret = 0; | |
1830 | struct cds_lfht_iter iter; | |
48842b30 DG |
1831 | struct ust_app_session *ua_sess; |
1832 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 1833 | struct ltt_ust_stream *ustream; |
7753dea8 | 1834 | int consumerd_fd; |
48842b30 | 1835 | |
421cb601 | 1836 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 1837 | |
509cbaf8 MD |
1838 | rcu_read_lock(); |
1839 | ||
421cb601 DG |
1840 | ua_sess = lookup_session_by_app(usess, app); |
1841 | if (ua_sess == NULL) { | |
509cbaf8 | 1842 | goto error_rcu_unlock; |
421cb601 | 1843 | } |
48842b30 | 1844 | |
aea829b3 DG |
1845 | /* Upon restart, we skip the setup, already done */ |
1846 | if (ua_sess->started) { | |
8be98f9a | 1847 | goto skip_setup; |
aea829b3 | 1848 | } |
8be98f9a | 1849 | |
421cb601 DG |
1850 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1851 | if (ret < 0) { | |
509cbaf8 | 1852 | goto error_rcu_unlock; |
421cb601 | 1853 | } |
48842b30 | 1854 | |
421cb601 | 1855 | /* For each channel */ |
5b4a0ec0 | 1856 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { |
421cb601 DG |
1857 | /* Create all streams */ |
1858 | while (1) { | |
5b4a0ec0 | 1859 | /* Create UST stream */ |
421cb601 DG |
1860 | ustream = zmalloc(sizeof(*ustream)); |
1861 | if (ustream == NULL) { | |
1862 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1863 | goto error_rcu_unlock; |
421cb601 | 1864 | } |
48842b30 | 1865 | |
421cb601 DG |
1866 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
1867 | &ustream->obj); | |
48842b30 | 1868 | if (ret < 0) { |
421cb601 DG |
1869 | /* Got all streams */ |
1870 | break; | |
48842b30 | 1871 | } |
421cb601 | 1872 | ustream->handle = ustream->obj->handle; |
48842b30 | 1873 | |
421cb601 DG |
1874 | /* Order is important */ |
1875 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
477d7741 MD |
1876 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", |
1877 | ua_sess->path, ua_chan->name, | |
1878 | ua_chan->streams.count++); | |
aba8e916 DG |
1879 | if (ret < 0) { |
1880 | PERROR("asprintf UST create stream"); | |
421cb601 | 1881 | continue; |
aba8e916 | 1882 | } |
421cb601 DG |
1883 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1884 | ustream->pathname); | |
1885 | } | |
421cb601 | 1886 | } |
aba8e916 | 1887 | |
7753dea8 MD |
1888 | switch (app->bits_per_long) { |
1889 | case 64: | |
1890 | consumerd_fd = ust_consumerd64_fd; | |
1891 | break; | |
1892 | case 32: | |
1893 | consumerd_fd = ust_consumerd32_fd; | |
1894 | break; | |
1895 | default: | |
1896 | ret = -EINVAL; | |
1897 | goto error_rcu_unlock; | |
1898 | } | |
aea829b3 | 1899 | |
421cb601 | 1900 | /* Setup UST consumer socket and send fds to it */ |
7753dea8 | 1901 | ret = ust_consumer_send_session(consumerd_fd, ua_sess); |
421cb601 | 1902 | if (ret < 0) { |
509cbaf8 | 1903 | goto error_rcu_unlock; |
421cb601 | 1904 | } |
8be98f9a | 1905 | ua_sess->started = 1; |
48842b30 | 1906 | |
8be98f9a | 1907 | skip_setup: |
421cb601 DG |
1908 | /* This start the UST tracing */ |
1909 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
1910 | if (ret < 0) { | |
1911 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 1912 | goto error_rcu_unlock; |
421cb601 | 1913 | } |
5b4a0ec0 | 1914 | |
509cbaf8 | 1915 | rcu_read_unlock(); |
48842b30 | 1916 | |
421cb601 DG |
1917 | /* Quiescent wait after starting trace */ |
1918 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 1919 | |
421cb601 | 1920 | return 0; |
48842b30 | 1921 | |
509cbaf8 MD |
1922 | error_rcu_unlock: |
1923 | rcu_read_unlock(); | |
421cb601 DG |
1924 | return -1; |
1925 | } | |
48842b30 | 1926 | |
8be98f9a MD |
1927 | /* |
1928 | * Stop tracing for a specific UST session and app. | |
1929 | */ | |
1930 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1931 | { | |
1932 | int ret = 0; | |
6d3686da | 1933 | struct cds_lfht_iter iter; |
8be98f9a | 1934 | struct ust_app_session *ua_sess; |
6d3686da | 1935 | struct ust_app_channel *ua_chan; |
8be98f9a MD |
1936 | |
1937 | DBG("Stopping tracing for ust app pid %d", app->key.pid); | |
1938 | ||
1939 | rcu_read_lock(); | |
1940 | ||
1941 | ua_sess = lookup_session_by_app(usess, app); | |
1942 | if (ua_sess == NULL) { | |
1943 | /* Only malloc can failed so something is really wrong */ | |
1944 | goto error_rcu_unlock; | |
1945 | } | |
1946 | ||
9d6c7d3f DG |
1947 | /* This inhibits UST tracing */ |
1948 | ret = ustctl_stop_session(app->key.sock, ua_sess->handle); | |
1949 | if (ret < 0) { | |
1950 | ERR("Error stopping tracing for app pid: %d", app->key.pid); | |
1951 | goto error_rcu_unlock; | |
1952 | } | |
1953 | ||
1954 | /* Quiescent wait after stopping trace */ | |
1955 | ustctl_wait_quiescent(app->key.sock); | |
1956 | ||
1957 | /* Flushing buffers */ | |
6d3686da DG |
1958 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { |
1959 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_chan->obj); | |
8be98f9a | 1960 | if (ret < 0) { |
6d3686da DG |
1961 | ERR("UST app PID %d channel %s flush failed", |
1962 | app->key.pid, ua_chan->name); | |
1963 | ERR("Ended with ret %d", ret); | |
1964 | /* Continuing flushing all buffers */ | |
1965 | continue; | |
8be98f9a MD |
1966 | } |
1967 | } | |
8be98f9a | 1968 | |
90d97d10 DG |
1969 | /* Flush all buffers before stopping */ |
1970 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_sess->metadata->obj); | |
1971 | if (ret < 0) { | |
1972 | ERR("UST app PID %d metadata flush failed", app->key.pid); | |
1973 | ERR("Ended with ret %d", ret); | |
1974 | } | |
1975 | ||
9d6c7d3f DG |
1976 | rcu_read_unlock(); |
1977 | ||
8be98f9a MD |
1978 | return 0; |
1979 | ||
1980 | error_rcu_unlock: | |
1981 | rcu_read_unlock(); | |
1982 | return -1; | |
1983 | } | |
1984 | ||
84cd17c6 MD |
1985 | /* |
1986 | * Destroy a specific UST session in apps. | |
1987 | */ | |
1988 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1989 | { | |
1990 | struct ust_app_session *ua_sess; | |
1991 | struct lttng_ust_object_data obj; | |
1992 | struct cds_lfht_iter iter; | |
1993 | struct cds_lfht_node *node; | |
525b0740 | 1994 | int ret; |
84cd17c6 MD |
1995 | |
1996 | DBG("Destroy tracing for ust app pid %d", app->key.pid); | |
1997 | ||
1998 | rcu_read_lock(); | |
1999 | ||
2000 | __lookup_session_by_app(usess, app, &iter); | |
2001 | node = hashtable_iter_get_node(&iter); | |
2002 | if (node == NULL) { | |
2003 | /* Only malloc can failed so something is really wrong */ | |
2004 | goto error_rcu_unlock; | |
2005 | } | |
2006 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
525b0740 MD |
2007 | ret = hashtable_del(app->sessions, &iter); |
2008 | assert(!ret); | |
84cd17c6 MD |
2009 | delete_ust_app_session(app->key.sock, ua_sess); |
2010 | obj.handle = ua_sess->handle; | |
2011 | obj.shm_fd = -1; | |
2012 | obj.wait_fd = -1; | |
2013 | obj.memory_map_size = 0; | |
2014 | ustctl_release_object(app->key.sock, &obj); | |
2015 | ||
2016 | rcu_read_unlock(); | |
2017 | ||
2018 | /* Quiescent wait after stopping trace */ | |
2019 | ustctl_wait_quiescent(app->key.sock); | |
2020 | ||
2021 | return 0; | |
2022 | ||
2023 | error_rcu_unlock: | |
2024 | rcu_read_unlock(); | |
2025 | return -1; | |
2026 | } | |
2027 | ||
5b4a0ec0 DG |
2028 | /* |
2029 | * Start tracing for the UST session. | |
2030 | */ | |
421cb601 DG |
2031 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
2032 | { | |
2033 | int ret = 0; | |
2034 | struct cds_lfht_iter iter; | |
421cb601 | 2035 | struct ust_app *app; |
48842b30 | 2036 | |
421cb601 DG |
2037 | DBG("Starting all UST traces"); |
2038 | ||
2039 | rcu_read_lock(); | |
421cb601 | 2040 | |
5b4a0ec0 | 2041 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
421cb601 | 2042 | ret = ust_app_start_trace(usess, app); |
48842b30 | 2043 | if (ret < 0) { |
5b4a0ec0 DG |
2044 | /* Continue to next apps even on error */ |
2045 | continue; | |
48842b30 | 2046 | } |
48842b30 | 2047 | } |
5b4a0ec0 | 2048 | |
48842b30 DG |
2049 | rcu_read_unlock(); |
2050 | ||
2051 | return 0; | |
2052 | } | |
487cf67c | 2053 | |
8be98f9a MD |
2054 | /* |
2055 | * Start tracing for the UST session. | |
2056 | */ | |
2057 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
2058 | { | |
2059 | int ret = 0; | |
2060 | struct cds_lfht_iter iter; | |
2061 | struct ust_app *app; | |
2062 | ||
2063 | DBG("Stopping all UST traces"); | |
2064 | ||
2065 | rcu_read_lock(); | |
2066 | ||
2067 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
2068 | ret = ust_app_stop_trace(usess, app); | |
2069 | if (ret < 0) { | |
2070 | /* Continue to next apps even on error */ | |
2071 | continue; | |
2072 | } | |
2073 | } | |
2074 | ||
2075 | rcu_read_unlock(); | |
2076 | ||
2077 | return 0; | |
2078 | } | |
2079 | ||
84cd17c6 MD |
2080 | /* |
2081 | * Destroy app UST session. | |
2082 | */ | |
2083 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
2084 | { | |
2085 | int ret = 0; | |
2086 | struct cds_lfht_iter iter; | |
2087 | struct ust_app *app; | |
2088 | ||
2089 | DBG("Destroy all UST traces"); | |
2090 | ||
2091 | rcu_read_lock(); | |
2092 | ||
2093 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
2094 | ret = ust_app_destroy_trace(usess, app); | |
2095 | if (ret < 0) { | |
2096 | /* Continue to next apps even on error */ | |
2097 | continue; | |
2098 | } | |
2099 | } | |
2100 | ||
2101 | rcu_read_unlock(); | |
2102 | ||
2103 | return 0; | |
2104 | } | |
2105 | ||
5b4a0ec0 DG |
2106 | /* |
2107 | * Add channels/events from UST global domain to registered apps at sock. | |
2108 | */ | |
487cf67c DG |
2109 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
2110 | { | |
2111 | int ret = 0; | |
487cf67c | 2112 | struct cds_lfht_iter iter; |
487cf67c DG |
2113 | struct ust_app *app; |
2114 | struct ust_app_session *ua_sess; | |
2115 | struct ust_app_channel *ua_chan; | |
2116 | struct ust_app_event *ua_event; | |
1f3580c7 DG |
2117 | |
2118 | if (usess == NULL) { | |
5b4a0ec0 | 2119 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
2120 | goto error; |
2121 | } | |
2122 | ||
487cf67c DG |
2123 | DBG2("UST app global update for app sock %d for session uid %d", sock, |
2124 | usess->uid); | |
2125 | ||
284d8f55 DG |
2126 | rcu_read_lock(); |
2127 | ||
487cf67c DG |
2128 | app = find_app_by_sock(sock); |
2129 | if (app == NULL) { | |
2130 | ERR("Failed to update app sock %d", sock); | |
2131 | goto error; | |
2132 | } | |
2133 | ||
421cb601 | 2134 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 2135 | if (ua_sess == NULL) { |
487cf67c DG |
2136 | goto error; |
2137 | } | |
2138 | ||
284d8f55 DG |
2139 | /* |
2140 | * We can iterate safely here over all UST app session sicne the create ust | |
2141 | * app session above made a shadow copy of the UST global domain from the | |
2142 | * ltt ust session. | |
2143 | */ | |
2144 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { | |
2145 | ret = create_ust_channel(app, ua_sess, ua_chan); | |
2146 | if (ret < 0) { | |
2147 | /* FIXME: Should we quit here or continue... */ | |
2148 | continue; | |
487cf67c DG |
2149 | } |
2150 | ||
284d8f55 DG |
2151 | /* For each events */ |
2152 | cds_lfht_for_each_entry(ua_chan->events, &iter, ua_event, node) { | |
2153 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); | |
2154 | if (ret < 0) { | |
2155 | /* FIXME: Should we quit here or continue... */ | |
2156 | continue; | |
487cf67c | 2157 | } |
36dc12cc | 2158 | } |
487cf67c DG |
2159 | } |
2160 | ||
36dc12cc | 2161 | if (usess->start_trace) { |
421cb601 | 2162 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 2163 | if (ret < 0) { |
36dc12cc DG |
2164 | goto error; |
2165 | } | |
2166 | ||
36dc12cc DG |
2167 | DBG2("UST trace started for app pid %d", app->key.pid); |
2168 | } | |
2169 | ||
487cf67c DG |
2170 | error: |
2171 | rcu_read_unlock(); | |
2172 | return; | |
2173 | } | |
55cc08a6 DG |
2174 | |
2175 | /* | |
2176 | * Add context to a specific channel for global UST domain. | |
2177 | */ | |
2178 | int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess, | |
2179 | struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx) | |
2180 | { | |
2181 | int ret = 0; | |
2182 | struct cds_lfht_node *ua_chan_node; | |
2183 | struct cds_lfht_iter iter, uiter; | |
2184 | struct ust_app_channel *ua_chan = NULL; | |
2185 | struct ust_app_session *ua_sess; | |
2186 | struct ust_app *app; | |
2187 | ||
2188 | rcu_read_lock(); | |
2189 | ||
2190 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
2191 | ua_sess = lookup_session_by_app(usess, app); | |
2192 | if (ua_sess == NULL) { | |
2193 | continue; | |
2194 | } | |
2195 | ||
2196 | /* Lookup channel in the ust app session */ | |
2197 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
2198 | (void *)uchan->name, strlen(uchan->name), &uiter); | |
2199 | if (ua_chan_node == NULL) { | |
2200 | continue; | |
2201 | } | |
2202 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2203 | node); | |
2204 | ||
2205 | ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app); | |
2206 | if (ret < 0) { | |
2207 | continue; | |
2208 | } | |
2209 | } | |
2210 | ||
55cc08a6 DG |
2211 | rcu_read_unlock(); |
2212 | return ret; | |
2213 | } | |
2214 | ||
2215 | /* | |
2216 | * Add context to a specific event in a channel for global UST domain. | |
2217 | */ | |
2218 | int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess, | |
2219 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
2220 | struct ltt_ust_context *uctx) | |
2221 | { | |
2222 | int ret = 0; | |
2223 | struct cds_lfht_node *ua_chan_node, *ua_event_node; | |
2224 | struct cds_lfht_iter iter, uiter; | |
2225 | struct ust_app_session *ua_sess; | |
2226 | struct ust_app_event *ua_event; | |
2227 | struct ust_app_channel *ua_chan = NULL; | |
2228 | struct ust_app *app; | |
2229 | ||
2230 | rcu_read_lock(); | |
2231 | ||
2232 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
2233 | ua_sess = lookup_session_by_app(usess, app); | |
2234 | if (ua_sess == NULL) { | |
2235 | continue; | |
2236 | } | |
2237 | ||
2238 | /* Lookup channel in the ust app session */ | |
2239 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
2240 | (void *)uchan->name, strlen(uchan->name), &uiter); | |
2241 | if (ua_chan_node == NULL) { | |
2242 | continue; | |
2243 | } | |
2244 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2245 | node); | |
2246 | ||
2247 | ua_event_node = hashtable_lookup(ua_chan->events, | |
2248 | (void *)uevent->attr.name, strlen(uevent->attr.name), &uiter); | |
2249 | if (ua_event_node == NULL) { | |
2250 | continue; | |
2251 | } | |
2252 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, | |
2253 | node); | |
2254 | ||
2255 | ret = create_ust_app_event_context(ua_sess, ua_event, &uctx->ctx, app); | |
2256 | if (ret < 0) { | |
2257 | continue; | |
2258 | } | |
2259 | } | |
2260 | ||
55cc08a6 DG |
2261 | rcu_read_unlock(); |
2262 | return ret; | |
2263 | } | |
76d45b40 DG |
2264 | |
2265 | /* | |
2266 | * Enable event for a channel from a UST session for a specific PID. | |
2267 | */ | |
2268 | int ust_app_enable_event_pid(struct ltt_ust_session *usess, | |
2269 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2270 | { | |
2271 | int ret = 0; | |
2272 | struct cds_lfht_iter iter; | |
2273 | struct cds_lfht_node *ua_chan_node, *ua_event_node; | |
2274 | struct ust_app *app; | |
2275 | struct ust_app_session *ua_sess; | |
2276 | struct ust_app_channel *ua_chan; | |
2277 | struct ust_app_event *ua_event; | |
2278 | ||
2279 | DBG("UST app enabling event %s for PID %d", uevent->attr.name, pid); | |
2280 | ||
2281 | rcu_read_lock(); | |
2282 | ||
2283 | app = ust_app_find_by_pid(pid); | |
2284 | if (app == NULL) { | |
2285 | ERR("UST app enable event per PID %d not found", pid); | |
2286 | ret = -1; | |
2287 | goto error; | |
2288 | } | |
2289 | ||
2290 | ua_sess = lookup_session_by_app(usess, app); | |
2291 | /* If ua_sess is NULL, there is a code flow error */ | |
2292 | assert(ua_sess); | |
2293 | ||
2294 | /* Lookup channel in the ust app session */ | |
2295 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, | |
2296 | strlen(uchan->name), &iter); | |
2297 | /* If the channel is not found, there is a code flow error */ | |
2298 | assert(ua_chan_node); | |
2299 | ||
2300 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2301 | ||
7f79d3a1 | 2302 | ua_event_node = hashtable_lookup(ua_chan->events, |
76d45b40 DG |
2303 | (void*)uevent->attr.name, strlen(uevent->attr.name), &iter); |
2304 | if (ua_event_node == NULL) { | |
2305 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); | |
2306 | if (ret < 0) { | |
2307 | goto error; | |
2308 | } | |
2309 | } else { | |
2310 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2311 | ||
2312 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2313 | if (ret < 0) { | |
2314 | goto error; | |
2315 | } | |
2316 | } | |
2317 | ||
2318 | error: | |
2319 | rcu_read_unlock(); | |
2320 | return ret; | |
2321 | } | |
7f79d3a1 DG |
2322 | |
2323 | /* | |
2324 | * Disable event for a channel from a UST session for a specific PID. | |
2325 | */ | |
2326 | int ust_app_disable_event_pid(struct ltt_ust_session *usess, | |
2327 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2328 | { | |
2329 | int ret = 0; | |
2330 | struct cds_lfht_iter iter; | |
2331 | struct cds_lfht_node *ua_chan_node, *ua_event_node; | |
2332 | struct ust_app *app; | |
2333 | struct ust_app_session *ua_sess; | |
2334 | struct ust_app_channel *ua_chan; | |
2335 | struct ust_app_event *ua_event; | |
2336 | ||
2337 | DBG("UST app disabling event %s for PID %d", uevent->attr.name, pid); | |
2338 | ||
2339 | rcu_read_lock(); | |
2340 | ||
2341 | app = ust_app_find_by_pid(pid); | |
2342 | if (app == NULL) { | |
2343 | ERR("UST app disable event per PID %d not found", pid); | |
2344 | ret = -1; | |
2345 | goto error; | |
2346 | } | |
2347 | ||
2348 | ua_sess = lookup_session_by_app(usess, app); | |
2349 | /* If ua_sess is NULL, there is a code flow error */ | |
2350 | assert(ua_sess); | |
2351 | ||
2352 | /* Lookup channel in the ust app session */ | |
2353 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, | |
2354 | strlen(uchan->name), &iter); | |
2355 | if (ua_chan_node == NULL) { | |
2356 | /* Channel does not exist, skip disabling */ | |
2357 | goto error; | |
2358 | } | |
2359 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2360 | ||
2361 | ua_event_node = hashtable_lookup(ua_chan->events, | |
2362 | (void*)uevent->attr.name, strlen(uevent->attr.name), &iter); | |
2363 | if (ua_event_node == NULL) { | |
2364 | /* Event does not exist, skip disabling */ | |
2365 | goto error; | |
2366 | } | |
2367 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2368 | ||
2369 | ret = disable_ust_app_event(ua_sess, ua_event, app); | |
2370 | if (ret < 0) { | |
2371 | goto error; | |
2372 | } | |
2373 | ||
2374 | error: | |
2375 | rcu_read_unlock(); | |
2376 | return ret; | |
2377 | } |