Commit | Line | Data |
---|---|---|
91d76f53 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
82a3637f DG |
6 | * as published by the Free Software Foundation; only version 2 |
7 | * of the License. | |
91d76f53 DG |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <errno.h> | |
21 | #include <pthread.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
099e26bd | 24 | #include <string.h> |
aba8e916 DG |
25 | #include <sys/stat.h> |
26 | #include <sys/types.h> | |
099e26bd | 27 | #include <unistd.h> |
60b6c79c | 28 | #include <runas.h> |
91d76f53 | 29 | |
0df502fd | 30 | #include <urcu/compiler.h> |
bec39940 | 31 | |
1e307fab | 32 | #include <lttngerr.h> |
bec39940 | 33 | #include <lttng-ht.h> |
48842b30 | 34 | #include <lttng-share.h> |
60b6c79c | 35 | #include <runas.h> |
1e307fab | 36 | |
56fff090 | 37 | #include "ust-app.h" |
48842b30 | 38 | #include "ust-consumer.h" |
d80a6244 DG |
39 | #include "ust-ctl.h" |
40 | ||
55cc08a6 DG |
41 | /* |
42 | * Delete ust context safely. RCU read lock must be held before calling | |
43 | * this function. | |
44 | */ | |
45 | static | |
46 | void delete_ust_app_ctx(int sock, struct ust_app_ctx *ua_ctx) | |
47 | { | |
48 | if (ua_ctx->obj) { | |
49 | ustctl_release_object(sock, ua_ctx->obj); | |
50 | free(ua_ctx->obj); | |
51 | } | |
52 | free(ua_ctx); | |
53 | } | |
54 | ||
d80a6244 DG |
55 | /* |
56 | * Delete ust app event safely. RCU read lock must be held before calling | |
57 | * this function. | |
58 | */ | |
8b366481 DG |
59 | static |
60 | void delete_ust_app_event(int sock, struct ust_app_event *ua_event) | |
d80a6244 | 61 | { |
55cc08a6 | 62 | int ret; |
bec39940 | 63 | struct lttng_ht_iter iter; |
55cc08a6 DG |
64 | struct ust_app_ctx *ua_ctx; |
65 | ||
bec39940 DG |
66 | cds_lfht_for_each_entry(ua_event->ctx->ht, &iter.iter, ua_ctx, |
67 | node.node) { | |
68 | ret = lttng_ht_del(ua_event->ctx, &iter); | |
55cc08a6 DG |
69 | assert(!ret); |
70 | delete_ust_app_ctx(sock, ua_ctx); | |
71 | } | |
bec39940 | 72 | lttng_ht_destroy(ua_event->ctx); |
d80a6244 | 73 | |
edb67388 DG |
74 | if (ua_event->obj != NULL) { |
75 | ustctl_release_object(sock, ua_event->obj); | |
76 | free(ua_event->obj); | |
77 | } | |
d80a6244 DG |
78 | free(ua_event); |
79 | } | |
80 | ||
81 | /* | |
82 | * Delete ust app stream safely. RCU read lock must be held before calling | |
83 | * this function. | |
84 | */ | |
8b366481 DG |
85 | static |
86 | void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream) | |
d80a6244 | 87 | { |
8b366481 DG |
88 | if (stream->obj) { |
89 | ustctl_release_object(sock, stream->obj); | |
90 | free(stream->obj); | |
91 | } | |
84cd17c6 | 92 | free(stream); |
d80a6244 DG |
93 | } |
94 | ||
95 | /* | |
96 | * Delete ust app channel safely. RCU read lock must be held before calling | |
97 | * this function. | |
98 | */ | |
8b366481 DG |
99 | static |
100 | void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan) | |
d80a6244 DG |
101 | { |
102 | int ret; | |
bec39940 | 103 | struct lttng_ht_iter iter; |
d80a6244 | 104 | struct ust_app_event *ua_event; |
55cc08a6 | 105 | struct ust_app_ctx *ua_ctx; |
d80a6244 DG |
106 | struct ltt_ust_stream *stream, *stmp; |
107 | ||
55cc08a6 | 108 | /* Wipe stream */ |
d80a6244 | 109 | cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) { |
84cd17c6 | 110 | cds_list_del(&stream->list); |
d80a6244 DG |
111 | delete_ust_app_stream(sock, stream); |
112 | } | |
113 | ||
55cc08a6 | 114 | /* Wipe context */ |
bec39940 DG |
115 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter.iter, ua_ctx, node.node) { |
116 | ret = lttng_ht_del(ua_chan->ctx, &iter); | |
55cc08a6 DG |
117 | assert(!ret); |
118 | delete_ust_app_ctx(sock, ua_ctx); | |
119 | } | |
bec39940 | 120 | lttng_ht_destroy(ua_chan->ctx); |
d80a6244 | 121 | |
55cc08a6 | 122 | /* Wipe events */ |
bec39940 DG |
123 | cds_lfht_for_each_entry(ua_chan->events->ht, &iter.iter, ua_event, |
124 | node.node) { | |
125 | ret = lttng_ht_del(ua_chan->events, &iter); | |
525b0740 | 126 | assert(!ret); |
d80a6244 DG |
127 | delete_ust_app_event(sock, ua_event); |
128 | } | |
bec39940 | 129 | lttng_ht_destroy(ua_chan->events); |
edb67388 DG |
130 | |
131 | if (ua_chan->obj != NULL) { | |
132 | ustctl_release_object(sock, ua_chan->obj); | |
133 | free(ua_chan->obj); | |
134 | } | |
84cd17c6 | 135 | free(ua_chan); |
d80a6244 DG |
136 | } |
137 | ||
138 | /* | |
139 | * Delete ust app session safely. RCU read lock must be held before calling | |
140 | * this function. | |
141 | */ | |
8b366481 DG |
142 | static |
143 | void delete_ust_app_session(int sock, struct ust_app_session *ua_sess) | |
d80a6244 DG |
144 | { |
145 | int ret; | |
bec39940 | 146 | struct lttng_ht_iter iter; |
d80a6244 DG |
147 | struct ust_app_channel *ua_chan; |
148 | ||
149 | if (ua_sess->metadata) { | |
8b366481 DG |
150 | if (ua_sess->metadata->stream_obj) { |
151 | ustctl_release_object(sock, ua_sess->metadata->stream_obj); | |
152 | free(ua_sess->metadata->stream_obj); | |
153 | } | |
154 | if (ua_sess->metadata->obj) { | |
155 | ustctl_release_object(sock, ua_sess->metadata->obj); | |
156 | free(ua_sess->metadata->obj); | |
157 | } | |
d80a6244 DG |
158 | } |
159 | ||
bec39940 DG |
160 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
161 | node.node) { | |
162 | ret = lttng_ht_del(ua_sess->channels, &iter); | |
525b0740 | 163 | assert(!ret); |
d80a6244 DG |
164 | delete_ust_app_channel(sock, ua_chan); |
165 | } | |
bec39940 | 166 | lttng_ht_destroy(ua_sess->channels); |
d80a6244 | 167 | |
aee6bafd MD |
168 | if (ua_sess->handle != -1) { |
169 | ustctl_release_handle(sock, ua_sess->handle); | |
170 | } | |
8b366481 | 171 | free(ua_sess); |
d80a6244 | 172 | } |
91d76f53 DG |
173 | |
174 | /* | |
284d8f55 DG |
175 | * Delete a traceable application structure from the global list. Never call |
176 | * this function outside of a call_rcu call. | |
91d76f53 | 177 | */ |
8b366481 DG |
178 | static |
179 | void delete_ust_app(struct ust_app *app) | |
91d76f53 | 180 | { |
8b366481 | 181 | int ret, sock; |
bec39940 | 182 | struct lttng_ht_iter iter; |
284d8f55 | 183 | struct ust_app_session *ua_sess; |
44d3bd01 | 184 | |
f6a9efaa | 185 | rcu_read_lock(); |
44d3bd01 | 186 | |
d80a6244 | 187 | /* Delete ust app sessions info */ |
6414a713 MD |
188 | sock = app->key.sock; |
189 | app->key.sock = -1; | |
d80a6244 | 190 | |
8b366481 | 191 | /* Wipe sessions */ |
bec39940 DG |
192 | cds_lfht_for_each_entry(app->sessions->ht, &iter.iter, ua_sess, |
193 | node.node) { | |
194 | ret = lttng_ht_del(app->sessions, &iter); | |
525b0740 | 195 | assert(!ret); |
284d8f55 | 196 | delete_ust_app_session(app->key.sock, ua_sess); |
d80a6244 | 197 | } |
bec39940 | 198 | lttng_ht_destroy(app->sessions); |
d80a6244 | 199 | |
6414a713 | 200 | /* |
bec39940 DG |
201 | * Wait until we have removed the key from the sock hash table before |
202 | * closing this socket, otherwise an application could re-use the socket ID | |
203 | * and race with the teardown, using the same hash table entry. | |
6414a713 MD |
204 | */ |
205 | close(sock); | |
d80a6244 | 206 | |
284d8f55 DG |
207 | DBG2("UST app pid %d deleted", app->key.pid); |
208 | free(app); | |
bec39940 | 209 | |
f6a9efaa | 210 | rcu_read_unlock(); |
099e26bd DG |
211 | } |
212 | ||
213 | /* | |
f6a9efaa | 214 | * URCU intermediate call to delete an UST app. |
099e26bd | 215 | */ |
8b366481 DG |
216 | static |
217 | void delete_ust_app_rcu(struct rcu_head *head) | |
099e26bd | 218 | { |
bec39940 DG |
219 | struct lttng_ht_node_ulong *node = |
220 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
221 | struct ust_app *app = |
222 | caa_container_of(node, struct ust_app, node); | |
223 | ||
bec39940 | 224 | DBG3("Call RCU deleting app PID %d", app->key.pid); |
f6a9efaa | 225 | delete_ust_app(app); |
099e26bd DG |
226 | } |
227 | ||
8b366481 DG |
228 | /* |
229 | * Alloc new UST app session. | |
230 | */ | |
231 | static | |
232 | struct ust_app_session *alloc_ust_app_session(void) | |
233 | { | |
234 | struct ust_app_session *ua_sess; | |
235 | ||
236 | /* Init most of the default value by allocating and zeroing */ | |
237 | ua_sess = zmalloc(sizeof(struct ust_app_session)); | |
238 | if (ua_sess == NULL) { | |
239 | PERROR("malloc"); | |
240 | goto error; | |
241 | } | |
242 | ||
243 | ua_sess->handle = -1; | |
bec39940 | 244 | ua_sess->channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
8b366481 DG |
245 | |
246 | return ua_sess; | |
247 | ||
248 | error: | |
249 | return NULL; | |
250 | } | |
251 | ||
252 | /* | |
253 | * Alloc new UST app channel. | |
254 | */ | |
255 | static | |
256 | struct ust_app_channel *alloc_ust_app_channel(char *name, | |
257 | struct lttng_ust_channel *attr) | |
258 | { | |
259 | struct ust_app_channel *ua_chan; | |
260 | ||
261 | /* Init most of the default value by allocating and zeroing */ | |
262 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); | |
263 | if (ua_chan == NULL) { | |
264 | PERROR("malloc"); | |
265 | goto error; | |
266 | } | |
267 | ||
268 | /* Setup channel name */ | |
269 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
270 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
271 | ||
272 | ua_chan->enabled = 1; | |
273 | ua_chan->handle = -1; | |
bec39940 DG |
274 | ua_chan->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
275 | ua_chan->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); | |
276 | lttng_ht_node_init_str(&ua_chan->node, ua_chan->name); | |
8b366481 DG |
277 | |
278 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); | |
279 | ||
280 | /* Copy attributes */ | |
281 | if (attr) { | |
282 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
283 | } | |
284 | ||
285 | DBG3("UST app channel %s allocated", ua_chan->name); | |
286 | ||
287 | return ua_chan; | |
288 | ||
289 | error: | |
290 | return NULL; | |
291 | } | |
292 | ||
293 | /* | |
294 | * Alloc new UST app event. | |
295 | */ | |
296 | static | |
297 | struct ust_app_event *alloc_ust_app_event(char *name, | |
298 | struct lttng_ust_event *attr) | |
299 | { | |
300 | struct ust_app_event *ua_event; | |
301 | ||
302 | /* Init most of the default value by allocating and zeroing */ | |
303 | ua_event = zmalloc(sizeof(struct ust_app_event)); | |
304 | if (ua_event == NULL) { | |
305 | PERROR("malloc"); | |
306 | goto error; | |
307 | } | |
308 | ||
309 | ua_event->enabled = 1; | |
310 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
311 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
bec39940 DG |
312 | ua_event->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
313 | lttng_ht_node_init_str(&ua_event->node, ua_event->name); | |
8b366481 DG |
314 | |
315 | /* Copy attributes */ | |
316 | if (attr) { | |
317 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
318 | } | |
319 | ||
320 | DBG3("UST app event %s allocated", ua_event->name); | |
321 | ||
322 | return ua_event; | |
323 | ||
324 | error: | |
325 | return NULL; | |
326 | } | |
327 | ||
328 | /* | |
329 | * Alloc new UST app context. | |
330 | */ | |
331 | static | |
332 | struct ust_app_ctx *alloc_ust_app_ctx(struct lttng_ust_context *uctx) | |
333 | { | |
334 | struct ust_app_ctx *ua_ctx; | |
335 | ||
336 | ua_ctx = zmalloc(sizeof(struct ust_app_ctx)); | |
337 | if (ua_ctx == NULL) { | |
338 | goto error; | |
339 | } | |
340 | ||
341 | if (uctx) { | |
342 | memcpy(&ua_ctx->ctx, uctx, sizeof(ua_ctx->ctx)); | |
343 | } | |
344 | ||
345 | DBG3("UST app context %d allocated", ua_ctx->ctx.ctx); | |
346 | ||
347 | error: | |
348 | return ua_ctx; | |
349 | } | |
350 | ||
099e26bd | 351 | /* |
421cb601 DG |
352 | * Find an ust_app using the sock and return it. RCU read side lock must be |
353 | * held before calling this helper function. | |
099e26bd | 354 | */ |
8b366481 DG |
355 | static |
356 | struct ust_app *find_app_by_sock(int sock) | |
099e26bd | 357 | { |
bec39940 | 358 | struct lttng_ht_node_ulong *node; |
f6a9efaa | 359 | struct ust_app_key *key; |
bec39940 | 360 | struct lttng_ht_iter iter; |
f6a9efaa | 361 | |
bec39940 DG |
362 | lttng_ht_lookup(ust_app_sock_key_map, (void *)((unsigned long) sock), |
363 | &iter); | |
364 | node = lttng_ht_iter_get_node_ulong(&iter); | |
f6a9efaa DG |
365 | if (node == NULL) { |
366 | DBG2("UST app find by sock %d key not found", sock); | |
f6a9efaa DG |
367 | goto error; |
368 | } | |
f6a9efaa DG |
369 | key = caa_container_of(node, struct ust_app_key, node); |
370 | ||
bec39940 DG |
371 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) key->pid), &iter); |
372 | node = lttng_ht_iter_get_node_ulong(&iter); | |
f6a9efaa DG |
373 | if (node == NULL) { |
374 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
375 | goto error; |
376 | } | |
f6a9efaa DG |
377 | return caa_container_of(node, struct ust_app, node); |
378 | ||
379 | error: | |
380 | return NULL; | |
099e26bd DG |
381 | } |
382 | ||
55cc08a6 DG |
383 | /* |
384 | * Create the channel context on the tracer. | |
385 | */ | |
386 | static | |
387 | int create_ust_channel_context(struct ust_app_channel *ua_chan, | |
388 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
389 | { | |
390 | int ret; | |
391 | ||
392 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
393 | ua_chan->obj, &ua_ctx->obj); | |
394 | if (ret < 0) { | |
395 | goto error; | |
396 | } | |
397 | ||
398 | ua_ctx->handle = ua_ctx->obj->handle; | |
399 | ||
400 | DBG2("UST app context added to channel %s successfully", ua_chan->name); | |
401 | ||
402 | error: | |
403 | return ret; | |
404 | } | |
405 | ||
406 | /* | |
407 | * Create the event context on the tracer. | |
408 | */ | |
409 | static | |
410 | int create_ust_event_context(struct ust_app_event *ua_event, | |
411 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
412 | { | |
413 | int ret; | |
414 | ||
415 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
416 | ua_event->obj, &ua_ctx->obj); | |
417 | if (ret < 0) { | |
418 | goto error; | |
419 | } | |
420 | ||
421 | ua_ctx->handle = ua_ctx->obj->handle; | |
422 | ||
423 | DBG2("UST app context added to event %s successfully", ua_event->name); | |
424 | ||
425 | error: | |
426 | return ret; | |
427 | } | |
428 | ||
9730260e DG |
429 | /* |
430 | * Disable the specified event on to UST tracer for the UST session. | |
431 | */ | |
432 | static int disable_ust_event(struct ust_app *app, | |
433 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
434 | { | |
435 | int ret; | |
436 | ||
437 | ret = ustctl_disable(app->key.sock, ua_event->obj); | |
438 | if (ret < 0) { | |
439 | ERR("UST app event %s disable failed for app (pid: %d) " | |
440 | "and session handle %d with ret %d", | |
441 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
442 | goto error; | |
443 | } | |
444 | ||
445 | DBG2("UST app event %s disabled successfully for app (pid: %d)", | |
446 | ua_event->attr.name, app->key.pid); | |
447 | ||
448 | error: | |
449 | return ret; | |
450 | } | |
451 | ||
78f0bacd DG |
452 | /* |
453 | * Disable the specified channel on to UST tracer for the UST session. | |
454 | */ | |
455 | static int disable_ust_channel(struct ust_app *app, | |
456 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
457 | { | |
458 | int ret; | |
459 | ||
460 | ret = ustctl_disable(app->key.sock, ua_chan->obj); | |
461 | if (ret < 0) { | |
462 | ERR("UST app channel %s disable failed for app (pid: %d) " | |
463 | "and session handle %d with ret %d", | |
464 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
465 | goto error; | |
466 | } | |
467 | ||
78f0bacd DG |
468 | DBG2("UST app channel %s disabled successfully for app (pid: %d)", |
469 | ua_chan->name, app->key.pid); | |
470 | ||
471 | error: | |
472 | return ret; | |
473 | } | |
474 | ||
475 | /* | |
476 | * Enable the specified channel on to UST tracer for the UST session. | |
477 | */ | |
478 | static int enable_ust_channel(struct ust_app *app, | |
479 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
480 | { | |
481 | int ret; | |
482 | ||
483 | ret = ustctl_enable(app->key.sock, ua_chan->obj); | |
484 | if (ret < 0) { | |
485 | ERR("UST app channel %s enable failed for app (pid: %d) " | |
486 | "and session handle %d with ret %d", | |
487 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
488 | goto error; | |
489 | } | |
490 | ||
491 | ua_chan->enabled = 1; | |
492 | ||
493 | DBG2("UST app channel %s enabled successfully for app (pid: %d)", | |
494 | ua_chan->name, app->key.pid); | |
495 | ||
496 | error: | |
497 | return ret; | |
498 | } | |
499 | ||
edb67388 DG |
500 | /* |
501 | * Enable the specified event on to UST tracer for the UST session. | |
502 | */ | |
503 | static int enable_ust_event(struct ust_app *app, | |
504 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
505 | { | |
506 | int ret; | |
507 | ||
508 | ret = ustctl_enable(app->key.sock, ua_event->obj); | |
509 | if (ret < 0) { | |
510 | ERR("UST app event %s enable failed for app (pid: %d) " | |
511 | "and session handle %d with ret %d", | |
512 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
513 | goto error; | |
514 | } | |
515 | ||
516 | DBG2("UST app event %s enabled successfully for app (pid: %d)", | |
517 | ua_event->attr.name, app->key.pid); | |
518 | ||
519 | error: | |
520 | return ret; | |
521 | } | |
522 | ||
099e26bd | 523 | /* |
5b4a0ec0 | 524 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 525 | */ |
5b4a0ec0 DG |
526 | static int open_ust_metadata(struct ust_app *app, |
527 | struct ust_app_session *ua_sess) | |
0177d773 | 528 | { |
5b4a0ec0 DG |
529 | int ret; |
530 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 531 | |
5b4a0ec0 DG |
532 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
533 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
534 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
535 | uattr.switch_timer_interval = | |
536 | ua_sess->metadata->attr.switch_timer_interval; | |
537 | uattr.read_timer_interval = | |
538 | ua_sess->metadata->attr.read_timer_interval; | |
539 | uattr.output = ua_sess->metadata->attr.output; | |
540 | ||
541 | /* UST tracer metadata creation */ | |
542 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
543 | &ua_sess->metadata->obj); | |
544 | if (ret < 0) { | |
545 | ERR("UST app open metadata failed for app pid:%d", | |
546 | app->key.pid); | |
f6a9efaa | 547 | goto error; |
0177d773 | 548 | } |
f6a9efaa | 549 | |
6d3686da DG |
550 | ua_sess->metadata->handle = ua_sess->metadata->obj->handle; |
551 | ||
f6a9efaa | 552 | error: |
5b4a0ec0 | 553 | return ret; |
91d76f53 DG |
554 | } |
555 | ||
556 | /* | |
5b4a0ec0 | 557 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 558 | */ |
5b4a0ec0 DG |
559 | static int create_ust_stream(struct ust_app *app, |
560 | struct ust_app_session *ua_sess) | |
91d76f53 | 561 | { |
5b4a0ec0 | 562 | int ret; |
421cb601 | 563 | |
5b4a0ec0 DG |
564 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, |
565 | &ua_sess->metadata->stream_obj); | |
566 | if (ret < 0) { | |
567 | ERR("UST create metadata stream failed"); | |
421cb601 | 568 | goto error; |
91d76f53 | 569 | } |
421cb601 | 570 | |
421cb601 | 571 | error: |
5b4a0ec0 | 572 | return ret; |
91d76f53 DG |
573 | } |
574 | ||
b551a063 | 575 | /* |
5b4a0ec0 | 576 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 577 | */ |
5b4a0ec0 DG |
578 | static int create_ust_channel(struct ust_app *app, |
579 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 580 | { |
5b4a0ec0 | 581 | int ret; |
b551a063 | 582 | |
5b4a0ec0 DG |
583 | /* TODO: remove cast and use lttng-ust-abi.h */ |
584 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
585 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); | |
586 | if (ret < 0) { | |
587 | DBG("Error creating channel %s for app (pid: %d, sock: %d) " | |
588 | "and session handle %d with ret %d", | |
589 | ua_chan->name, app->key.pid, app->key.sock, | |
590 | ua_sess->handle, ret); | |
b551a063 DG |
591 | goto error; |
592 | } | |
593 | ||
5b4a0ec0 DG |
594 | ua_chan->handle = ua_chan->obj->handle; |
595 | ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; | |
596 | ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; | |
597 | ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; | |
b551a063 | 598 | |
5b4a0ec0 DG |
599 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
600 | ua_chan->name, app->key.pid, app->key.sock); | |
b551a063 | 601 | |
8535a6d9 DG |
602 | /* If channel is not enabled, disable it on the tracer */ |
603 | if (!ua_chan->enabled) { | |
604 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
605 | if (ret < 0) { | |
606 | goto error; | |
607 | } | |
608 | } | |
609 | ||
b551a063 DG |
610 | error: |
611 | return ret; | |
612 | } | |
613 | ||
91d76f53 | 614 | /* |
5b4a0ec0 | 615 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 616 | */ |
edb67388 DG |
617 | static |
618 | int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess, | |
619 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event) | |
91d76f53 | 620 | { |
5b4a0ec0 | 621 | int ret = 0; |
284d8f55 | 622 | |
5b4a0ec0 DG |
623 | /* Create UST event on tracer */ |
624 | ret = ustctl_create_event(app->key.sock, &ua_event->attr, ua_chan->obj, | |
625 | &ua_event->obj); | |
626 | if (ret < 0) { | |
627 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
628 | ua_event->attr.name, app->key.pid, ret); | |
629 | goto error; | |
91d76f53 | 630 | } |
f6a9efaa | 631 | |
5b4a0ec0 | 632 | ua_event->handle = ua_event->obj->handle; |
284d8f55 | 633 | |
5b4a0ec0 DG |
634 | DBG2("UST app event %s created successfully for pid:%d", |
635 | ua_event->attr.name, app->key.pid); | |
f6a9efaa | 636 | |
8535a6d9 DG |
637 | /* If event not enabled, disable it on the tracer */ |
638 | if (!ua_event->enabled) { | |
639 | ret = disable_ust_event(app, ua_sess, ua_event); | |
640 | if (ret < 0) { | |
641 | goto error; | |
642 | } | |
643 | } | |
644 | ||
5b4a0ec0 DG |
645 | error: |
646 | return ret; | |
91d76f53 | 647 | } |
48842b30 | 648 | |
5b4a0ec0 DG |
649 | /* |
650 | * Copy data between an UST app event and a LTT event. | |
651 | */ | |
421cb601 | 652 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
653 | struct ltt_ust_event *uevent) |
654 | { | |
bec39940 | 655 | struct lttng_ht_iter iter; |
55cc08a6 DG |
656 | struct ltt_ust_context *uctx; |
657 | struct ust_app_ctx *ua_ctx; | |
658 | ||
48842b30 DG |
659 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); |
660 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
661 | ||
5b4a0ec0 DG |
662 | /* Copy event attributes */ |
663 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
664 | ||
bec39940 | 665 | cds_lfht_for_each_entry(uevent->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
666 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
667 | if (ua_ctx == NULL) { | |
668 | continue; | |
669 | } | |
bec39940 DG |
670 | lttng_ht_node_init_ulong(&ua_ctx->node, |
671 | (unsigned long) ua_ctx->ctx.ctx); | |
672 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 | 673 | } |
48842b30 DG |
674 | } |
675 | ||
5b4a0ec0 DG |
676 | /* |
677 | * Copy data between an UST app channel and a LTT channel. | |
678 | */ | |
421cb601 | 679 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
680 | struct ltt_ust_channel *uchan) |
681 | { | |
bec39940 DG |
682 | struct lttng_ht_iter iter; |
683 | struct lttng_ht_node_str *ua_event_node; | |
48842b30 | 684 | struct ltt_ust_event *uevent; |
55cc08a6 | 685 | struct ltt_ust_context *uctx; |
48842b30 | 686 | struct ust_app_event *ua_event; |
55cc08a6 | 687 | struct ust_app_ctx *ua_ctx; |
48842b30 | 688 | |
421cb601 | 689 | DBG2("Shadow copy of UST app channel %s", ua_chan->name); |
48842b30 DG |
690 | |
691 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
692 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
693 | /* Copy event attributes */ |
694 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 | 695 | |
bec39940 | 696 | cds_lfht_for_each_entry(uchan->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
697 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
698 | if (ua_ctx == NULL) { | |
699 | continue; | |
700 | } | |
bec39940 DG |
701 | lttng_ht_node_init_ulong(&ua_ctx->node, |
702 | (unsigned long) ua_ctx->ctx.ctx); | |
703 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 | 704 | } |
48842b30 | 705 | |
421cb601 | 706 | /* Copy all events from ltt ust channel to ust app channel */ |
bec39940 DG |
707 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
708 | struct lttng_ht_iter uiter; | |
ba767faf | 709 | |
bec39940 DG |
710 | lttng_ht_lookup(ua_chan->events, (void *) uevent->attr.name, &uiter); |
711 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
48842b30 | 712 | if (ua_event_node == NULL) { |
421cb601 | 713 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 714 | uevent->attr.name); |
284d8f55 | 715 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 716 | if (ua_event == NULL) { |
5b4a0ec0 | 717 | continue; |
48842b30 | 718 | } |
421cb601 | 719 | shadow_copy_event(ua_event, uevent); |
bec39940 | 720 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
48842b30 | 721 | } |
48842b30 DG |
722 | } |
723 | ||
421cb601 | 724 | DBG3("Shadow copy channel done"); |
48842b30 DG |
725 | } |
726 | ||
5b4a0ec0 DG |
727 | /* |
728 | * Copy data between a UST app session and a regular LTT session. | |
729 | */ | |
421cb601 | 730 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
bec39940 | 731 | struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 | 732 | { |
bec39940 DG |
733 | struct lttng_ht_node_str *ua_chan_node; |
734 | struct lttng_ht_iter iter; | |
48842b30 DG |
735 | struct ltt_ust_channel *uchan; |
736 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
737 | time_t rawtime; |
738 | struct tm *timeinfo; | |
739 | char datetime[16]; | |
740 | int ret; | |
741 | ||
742 | /* Get date and time for unique app path */ | |
743 | time(&rawtime); | |
744 | timeinfo = localtime(&rawtime); | |
745 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 746 | |
421cb601 | 747 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 | 748 | |
a991f516 | 749 | ua_sess->id = usess->id; |
6df2e2c9 MD |
750 | ua_sess->uid = usess->uid; |
751 | ua_sess->gid = usess->gid; | |
48842b30 | 752 | |
477d7741 MD |
753 | ret = snprintf(ua_sess->path, PATH_MAX, |
754 | "%s/%s-%d-%s", | |
755 | usess->pathname, app->name, app->key.pid, | |
756 | datetime); | |
757 | if (ret < 0) { | |
758 | PERROR("asprintf UST shadow copy session"); | |
759 | /* TODO: We cannot return an error from here.. */ | |
760 | assert(0); | |
761 | } | |
762 | ||
48842b30 DG |
763 | /* TODO: support all UST domain */ |
764 | ||
765 | /* Iterate over all channels in global domain. */ | |
bec39940 DG |
766 | cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter, |
767 | uchan, node.node) { | |
768 | struct lttng_ht_iter uiter; | |
ba767faf | 769 | |
bec39940 DG |
770 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
771 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
5b4a0ec0 DG |
772 | if (ua_chan_node != NULL) { |
773 | continue; | |
774 | } | |
421cb601 | 775 | |
5b4a0ec0 DG |
776 | DBG2("Channel %s not found on shadow session copy, creating it", |
777 | uchan->name); | |
778 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
779 | if (ua_chan == NULL) { | |
780 | /* malloc failed... continuing */ | |
781 | continue; | |
48842b30 DG |
782 | } |
783 | ||
5b4a0ec0 | 784 | shadow_copy_channel(ua_chan, uchan); |
bec39940 | 785 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
48842b30 DG |
786 | } |
787 | } | |
788 | ||
78f0bacd DG |
789 | /* |
790 | * Lookup sesison wrapper. | |
791 | */ | |
84cd17c6 MD |
792 | static |
793 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
bec39940 | 794 | struct ust_app *app, struct lttng_ht_iter *iter) |
84cd17c6 MD |
795 | { |
796 | /* Get right UST app session from app */ | |
2c348c10 | 797 | lttng_ht_lookup(app->sessions, (void *)((unsigned long) usess->id), iter); |
84cd17c6 MD |
798 | } |
799 | ||
421cb601 DG |
800 | /* |
801 | * Return ust app session from the app session hashtable using the UST session | |
a991f516 | 802 | * id. |
421cb601 | 803 | */ |
48842b30 DG |
804 | static struct ust_app_session *lookup_session_by_app( |
805 | struct ltt_ust_session *usess, struct ust_app *app) | |
806 | { | |
bec39940 DG |
807 | struct lttng_ht_iter iter; |
808 | struct lttng_ht_node_ulong *node; | |
48842b30 | 809 | |
84cd17c6 | 810 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 811 | node = lttng_ht_iter_get_node_ulong(&iter); |
48842b30 DG |
812 | if (node == NULL) { |
813 | goto error; | |
814 | } | |
815 | ||
816 | return caa_container_of(node, struct ust_app_session, node); | |
817 | ||
818 | error: | |
819 | return NULL; | |
820 | } | |
821 | ||
421cb601 DG |
822 | /* |
823 | * Create a UST session onto the tracer of app and add it the session | |
824 | * hashtable. | |
825 | * | |
826 | * Return ust app session or NULL on error. | |
827 | */ | |
828 | static struct ust_app_session *create_ust_app_session( | |
829 | struct ltt_ust_session *usess, struct ust_app *app) | |
830 | { | |
831 | int ret; | |
832 | struct ust_app_session *ua_sess; | |
833 | ||
834 | ua_sess = lookup_session_by_app(usess, app); | |
835 | if (ua_sess == NULL) { | |
a991f516 MD |
836 | DBG2("UST app pid: %d session id %d not found, creating it", |
837 | app->key.pid, usess->id); | |
421cb601 DG |
838 | ua_sess = alloc_ust_app_session(); |
839 | if (ua_sess == NULL) { | |
840 | /* Only malloc can failed so something is really wrong */ | |
841 | goto error; | |
842 | } | |
477d7741 | 843 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
844 | } |
845 | ||
846 | if (ua_sess->handle == -1) { | |
847 | ret = ustctl_create_session(app->key.sock); | |
848 | if (ret < 0) { | |
849 | ERR("Error creating session for app pid %d, sock %d", | |
850 | app->key.pid, app->key.sock); | |
851 | /* TODO: free() ua_sess */ | |
852 | goto error; | |
853 | } | |
854 | ||
855 | DBG2("UST app ustctl create session handle %d", ret); | |
856 | ua_sess->handle = ret; | |
857 | ||
858 | /* Add ust app session to app's HT */ | |
2c348c10 | 859 | lttng_ht_node_init_ulong(&ua_sess->node, (unsigned long) ua_sess->id); |
bec39940 | 860 | lttng_ht_add_unique_ulong(app->sessions, &ua_sess->node); |
421cb601 DG |
861 | |
862 | DBG2("UST app session created successfully with handle %d", ret); | |
863 | } | |
864 | ||
865 | return ua_sess; | |
866 | ||
867 | error: | |
868 | return NULL; | |
869 | } | |
870 | ||
55cc08a6 DG |
871 | /* |
872 | * Create a context for the channel on the tracer. | |
873 | */ | |
874 | static | |
875 | int create_ust_app_channel_context(struct ust_app_session *ua_sess, | |
876 | struct ust_app_channel *ua_chan, struct lttng_ust_context *uctx, | |
877 | struct ust_app *app) | |
878 | { | |
879 | int ret = 0; | |
bec39940 DG |
880 | struct lttng_ht_iter iter; |
881 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
882 | struct ust_app_ctx *ua_ctx; |
883 | ||
884 | DBG2("UST app adding context to channel %s", ua_chan->name); | |
885 | ||
bec39940 DG |
886 | lttng_ht_lookup(ua_chan->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
887 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
888 | if (node != NULL) { |
889 | ret = -EEXIST; | |
890 | goto error; | |
891 | } | |
892 | ||
893 | ua_ctx = alloc_ust_app_ctx(uctx); | |
894 | if (ua_ctx == NULL) { | |
895 | /* malloc failed */ | |
896 | ret = -1; | |
897 | goto error; | |
898 | } | |
899 | ||
bec39940 DG |
900 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
901 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 DG |
902 | |
903 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
904 | if (ret < 0) { | |
905 | goto error; | |
906 | } | |
907 | ||
908 | error: | |
909 | return ret; | |
910 | } | |
911 | ||
912 | /* | |
913 | * Create an UST context and enable it for the event on the tracer. | |
914 | */ | |
915 | static | |
916 | int create_ust_app_event_context(struct ust_app_session *ua_sess, | |
917 | struct ust_app_event *ua_event, struct lttng_ust_context *uctx, | |
918 | struct ust_app *app) | |
919 | { | |
920 | int ret = 0; | |
bec39940 DG |
921 | struct lttng_ht_iter iter; |
922 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
923 | struct ust_app_ctx *ua_ctx; |
924 | ||
925 | DBG2("UST app adding context to event %s", ua_event->name); | |
926 | ||
bec39940 DG |
927 | lttng_ht_lookup(ua_event->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
928 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
929 | if (node != NULL) { |
930 | ret = -EEXIST; | |
931 | goto error; | |
932 | } | |
933 | ||
934 | ua_ctx = alloc_ust_app_ctx(uctx); | |
935 | if (ua_ctx == NULL) { | |
936 | /* malloc failed */ | |
937 | ret = -1; | |
938 | goto error; | |
939 | } | |
940 | ||
bec39940 DG |
941 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
942 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 DG |
943 | |
944 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
945 | if (ret < 0) { | |
946 | goto error; | |
947 | } | |
948 | ||
949 | error: | |
950 | return ret; | |
951 | } | |
952 | ||
edb67388 DG |
953 | /* |
954 | * Enable on the tracer side a ust app event for the session and channel. | |
955 | */ | |
956 | static | |
957 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 958 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
959 | { |
960 | int ret; | |
961 | ||
962 | ret = enable_ust_event(app, ua_sess, ua_event); | |
963 | if (ret < 0) { | |
964 | goto error; | |
965 | } | |
966 | ||
967 | ua_event->enabled = 1; | |
968 | ||
969 | error: | |
970 | return ret; | |
971 | } | |
972 | ||
9730260e DG |
973 | /* |
974 | * Disable on the tracer side a ust app event for the session and channel. | |
975 | */ | |
976 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
7f79d3a1 | 977 | struct ust_app_event *ua_event, struct ust_app *app) |
9730260e DG |
978 | { |
979 | int ret; | |
980 | ||
981 | ret = disable_ust_event(app, ua_sess, ua_event); | |
982 | if (ret < 0) { | |
983 | goto error; | |
984 | } | |
985 | ||
986 | ua_event->enabled = 0; | |
987 | ||
988 | error: | |
989 | return ret; | |
990 | } | |
991 | ||
78f0bacd DG |
992 | /* |
993 | * Lookup ust app channel for session and disable it on the tracer side. | |
994 | */ | |
8535a6d9 DG |
995 | static |
996 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
997 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 998 | { |
8535a6d9 | 999 | int ret; |
78f0bacd DG |
1000 | |
1001 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
1002 | if (ret < 0) { | |
1003 | goto error; | |
1004 | } | |
1005 | ||
8535a6d9 DG |
1006 | ua_chan->enabled = 0; |
1007 | ||
78f0bacd DG |
1008 | error: |
1009 | return ret; | |
1010 | } | |
1011 | ||
1012 | /* | |
1013 | * Lookup ust app channel for session and enable it on the tracer side. | |
1014 | */ | |
1015 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
1016 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
1017 | { | |
1018 | int ret = 0; | |
bec39940 DG |
1019 | struct lttng_ht_iter iter; |
1020 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1021 | struct ust_app_channel *ua_chan; |
1022 | ||
bec39940 DG |
1023 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1024 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
78f0bacd | 1025 | if (ua_chan_node == NULL) { |
a991f516 MD |
1026 | DBG2("Unable to find channel %s in ust session id %u", |
1027 | uchan->name, ua_sess->id); | |
78f0bacd DG |
1028 | goto error; |
1029 | } | |
1030 | ||
1031 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1032 | ||
1033 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
1034 | if (ret < 0) { | |
1035 | goto error; | |
1036 | } | |
1037 | ||
1038 | error: | |
1039 | return ret; | |
1040 | } | |
1041 | ||
284d8f55 | 1042 | /* |
5b4a0ec0 | 1043 | * Create UST app channel and create it on the tracer. |
284d8f55 | 1044 | */ |
5b4a0ec0 DG |
1045 | static struct ust_app_channel *create_ust_app_channel( |
1046 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
1047 | struct ust_app *app) | |
1048 | { | |
1049 | int ret = 0; | |
bec39940 DG |
1050 | struct lttng_ht_iter iter; |
1051 | struct lttng_ht_node_str *ua_chan_node; | |
5b4a0ec0 DG |
1052 | struct ust_app_channel *ua_chan; |
1053 | ||
1054 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1055 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1056 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
5b4a0ec0 | 1057 | if (ua_chan_node == NULL) { |
a991f516 MD |
1058 | DBG2("Unable to find channel %s in ust session id %u", |
1059 | uchan->name, ua_sess->id); | |
5b4a0ec0 DG |
1060 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); |
1061 | if (ua_chan == NULL) { | |
1062 | goto error; | |
1063 | } | |
1064 | shadow_copy_channel(ua_chan, uchan); | |
1065 | ||
bec39940 | 1066 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
5b4a0ec0 DG |
1067 | } else { |
1068 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1069 | } | |
1070 | ||
1071 | ret = create_ust_channel(app, ua_sess, ua_chan); | |
1072 | if (ret < 0) { | |
1073 | goto error; | |
1074 | } | |
1075 | ||
1076 | return ua_chan; | |
1077 | ||
1078 | error: | |
1079 | return NULL; | |
1080 | } | |
1081 | ||
1082 | /* | |
1083 | * Create UST app event and create it on the tracer side. | |
1084 | */ | |
edb67388 DG |
1085 | static |
1086 | int create_ust_app_event(struct ust_app_session *ua_sess, | |
1087 | struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent, | |
1088 | struct ust_app *app) | |
284d8f55 | 1089 | { |
edb67388 | 1090 | int ret = 0; |
bec39940 DG |
1091 | struct lttng_ht_iter iter; |
1092 | struct lttng_ht_node_str *ua_event_node; | |
5b4a0ec0 | 1093 | struct ust_app_event *ua_event; |
284d8f55 | 1094 | |
5b4a0ec0 | 1095 | /* Get event node */ |
bec39940 DG |
1096 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
1097 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
edb67388 DG |
1098 | if (ua_event_node != NULL) { |
1099 | ERR("UST app event %s already exist. Stopping creation.", | |
1100 | uevent->attr.name); | |
1101 | goto end; | |
1102 | } | |
5b4a0ec0 | 1103 | |
edb67388 DG |
1104 | /* Does not exist so create one */ |
1105 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
1106 | if (ua_event == NULL) { | |
1107 | /* Only malloc can failed so something is really wrong */ | |
1108 | ret = -ENOMEM; | |
1109 | goto error; | |
5b4a0ec0 | 1110 | } |
edb67388 | 1111 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 1112 | |
edb67388 | 1113 | /* Create it on the tracer side */ |
5b4a0ec0 | 1114 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 1115 | if (ret < 0) { |
e5abf1bf | 1116 | rcu_read_lock(); |
edb67388 | 1117 | delete_ust_app_event(app->key.sock, ua_event); |
e5abf1bf | 1118 | rcu_read_unlock(); |
284d8f55 DG |
1119 | goto error; |
1120 | } | |
1121 | ||
8535a6d9 DG |
1122 | ua_event->enabled = 1; |
1123 | ||
bec39940 | 1124 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
284d8f55 | 1125 | |
7f79d3a1 DG |
1126 | DBG2("UST app create event %s for PID %d completed", |
1127 | ua_event->name, app->key.pid); | |
1128 | ||
edb67388 | 1129 | end: |
5b4a0ec0 | 1130 | error: |
edb67388 | 1131 | return ret; |
5b4a0ec0 DG |
1132 | } |
1133 | ||
1134 | /* | |
1135 | * Create UST metadata and open it on the tracer side. | |
1136 | */ | |
1137 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
1138 | char *pathname, struct ust_app *app) | |
1139 | { | |
1140 | int ret = 0; | |
1141 | ||
1142 | if (ua_sess->metadata == NULL) { | |
1143 | /* Allocate UST metadata */ | |
1144 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
1145 | if (ua_sess->metadata == NULL) { | |
1146 | ERR("UST app session %d creating metadata failed", | |
1147 | ua_sess->handle); | |
1148 | goto error; | |
1149 | } | |
1150 | ||
1151 | ret = open_ust_metadata(app, ua_sess); | |
1152 | if (ret < 0) { | |
1153 | goto error; | |
1154 | } | |
1155 | ||
1156 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
1157 | } | |
1158 | ||
1159 | /* Open UST metadata stream */ | |
1160 | if (ua_sess->metadata->stream_obj == NULL) { | |
1161 | ret = create_ust_stream(app, ua_sess); | |
1162 | if (ret < 0) { | |
1163 | goto error; | |
1164 | } | |
1165 | ||
67f747d8 MD |
1166 | ret = mkdir_run_as(ua_sess->path, S_IRWXU | S_IRWXG, |
1167 | ua_sess->uid, ua_sess->gid); | |
5b4a0ec0 DG |
1168 | if (ret < 0) { |
1169 | PERROR("mkdir UST metadata"); | |
1170 | goto error; | |
1171 | } | |
1172 | ||
477d7741 MD |
1173 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
1174 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
1175 | if (ret < 0) { |
1176 | PERROR("asprintf UST create stream"); | |
1177 | goto error; | |
1178 | } | |
1179 | ||
1180 | DBG2("UST metadata stream object created for app pid %d", | |
1181 | app->key.pid); | |
1182 | } else { | |
1183 | ERR("Attempting to create stream without metadata opened"); | |
1184 | goto error; | |
1185 | } | |
1186 | ||
1187 | return 0; | |
1188 | ||
1189 | error: | |
1190 | return -1; | |
1191 | } | |
1192 | ||
1193 | /* | |
1194 | * Return pointer to traceable apps list. | |
1195 | */ | |
bec39940 | 1196 | struct lttng_ht *ust_app_get_ht(void) |
5b4a0ec0 DG |
1197 | { |
1198 | return ust_app_ht; | |
1199 | } | |
1200 | ||
1201 | /* | |
1202 | * Return ust app pointer or NULL if not found. | |
1203 | */ | |
1204 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
1205 | { | |
bec39940 DG |
1206 | struct lttng_ht_node_ulong *node; |
1207 | struct lttng_ht_iter iter; | |
5b4a0ec0 DG |
1208 | |
1209 | rcu_read_lock(); | |
bec39940 DG |
1210 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) pid), &iter); |
1211 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1212 | if (node == NULL) { |
1213 | DBG2("UST app no found with pid %d", pid); | |
1214 | goto error; | |
1215 | } | |
1216 | rcu_read_unlock(); | |
1217 | ||
1218 | DBG2("Found UST app by pid %d", pid); | |
1219 | ||
1220 | return caa_container_of(node, struct ust_app, node); | |
1221 | ||
1222 | error: | |
1223 | rcu_read_unlock(); | |
1224 | return NULL; | |
1225 | } | |
1226 | ||
1227 | /* | |
1228 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
1229 | * add it to the global traceable app list. | |
1230 | * | |
0df502fd MD |
1231 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
1232 | * bitness is not supported. | |
5b4a0ec0 DG |
1233 | */ |
1234 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
1235 | { | |
1236 | struct ust_app *lta; | |
1237 | ||
7753dea8 MD |
1238 | if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL) |
1239 | || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) { | |
f943b0fb | 1240 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1241 | "%d-bit long, but no consumerd for this long size is available.\n", |
1242 | msg->name, msg->pid, msg->bits_per_long); | |
88ff5b7f | 1243 | close(sock); |
0df502fd MD |
1244 | return -EINVAL; |
1245 | } | |
5b4a0ec0 DG |
1246 | lta = zmalloc(sizeof(struct ust_app)); |
1247 | if (lta == NULL) { | |
1248 | PERROR("malloc"); | |
1249 | return -ENOMEM; | |
1250 | } | |
1251 | ||
1252 | lta->ppid = msg->ppid; | |
1253 | lta->uid = msg->uid; | |
1254 | lta->gid = msg->gid; | |
7753dea8 | 1255 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1256 | lta->v_major = msg->major; |
1257 | lta->v_minor = msg->minor; | |
1258 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1259 | lta->name[16] = '\0'; | |
bec39940 | 1260 | lta->sessions = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
5b4a0ec0 DG |
1261 | |
1262 | /* Set key map */ | |
1263 | lta->key.pid = msg->pid; | |
bec39940 | 1264 | lttng_ht_node_init_ulong(<a->node, (unsigned long)lta->key.pid); |
5b4a0ec0 | 1265 | lta->key.sock = sock; |
bec39940 | 1266 | lttng_ht_node_init_ulong(<a->key.node, (unsigned long)lta->key.sock); |
5b4a0ec0 DG |
1267 | |
1268 | rcu_read_lock(); | |
bec39940 DG |
1269 | lttng_ht_add_unique_ulong(ust_app_sock_key_map, <a->key.node); |
1270 | lttng_ht_add_unique_ulong(ust_app_ht, <a->node); | |
5b4a0ec0 DG |
1271 | rcu_read_unlock(); |
1272 | ||
1273 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
1274 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, | |
1275 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
1276 | ||
1277 | return 0; | |
1278 | } | |
1279 | ||
1280 | /* | |
1281 | * Unregister app by removing it from the global traceable app list and freeing | |
1282 | * the data struct. | |
1283 | * | |
1284 | * The socket is already closed at this point so no close to sock. | |
1285 | */ | |
1286 | void ust_app_unregister(int sock) | |
1287 | { | |
1288 | struct ust_app *lta; | |
bec39940 DG |
1289 | struct lttng_ht_node_ulong *node; |
1290 | struct lttng_ht_iter iter; | |
525b0740 | 1291 | int ret; |
5b4a0ec0 DG |
1292 | |
1293 | rcu_read_lock(); | |
1294 | lta = find_app_by_sock(sock); | |
1295 | if (lta == NULL) { | |
1296 | ERR("Unregister app sock %d not found!", sock); | |
1297 | goto error; | |
1298 | } | |
1299 | ||
1300 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
1301 | ||
1302 | /* Get the node reference for a call_rcu */ | |
bec39940 DG |
1303 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) lta->key.pid), &iter); |
1304 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1305 | if (node == NULL) { |
1306 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
1307 | goto error; | |
1308 | } | |
284d8f55 | 1309 | |
bec39940 | 1310 | ret = lttng_ht_del(ust_app_ht, &iter); |
525b0740 | 1311 | assert(!ret); |
5b4a0ec0 | 1312 | call_rcu(&node->head, delete_ust_app_rcu); |
284d8f55 | 1313 | error: |
5b4a0ec0 DG |
1314 | rcu_read_unlock(); |
1315 | return; | |
284d8f55 DG |
1316 | } |
1317 | ||
1318 | /* | |
5b4a0ec0 | 1319 | * Return traceable_app_count |
284d8f55 | 1320 | */ |
5b4a0ec0 | 1321 | unsigned long ust_app_list_count(void) |
284d8f55 | 1322 | { |
5b4a0ec0 | 1323 | unsigned long count; |
284d8f55 | 1324 | |
5b4a0ec0 | 1325 | rcu_read_lock(); |
bec39940 | 1326 | count = lttng_ht_get_count(ust_app_ht); |
5b4a0ec0 | 1327 | rcu_read_unlock(); |
284d8f55 | 1328 | |
5b4a0ec0 | 1329 | return count; |
284d8f55 DG |
1330 | } |
1331 | ||
5b4a0ec0 DG |
1332 | /* |
1333 | * Fill events array with all events name of all registered apps. | |
1334 | */ | |
1335 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1336 | { |
5b4a0ec0 DG |
1337 | int ret, handle; |
1338 | size_t nbmem, count = 0; | |
bec39940 | 1339 | struct lttng_ht_iter iter; |
5b4a0ec0 DG |
1340 | struct ust_app *app; |
1341 | struct lttng_event *tmp; | |
421cb601 | 1342 | |
5b4a0ec0 DG |
1343 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1344 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1345 | if (tmp == NULL) { | |
1346 | PERROR("zmalloc ust app events"); | |
1347 | ret = -ENOMEM; | |
421cb601 DG |
1348 | goto error; |
1349 | } | |
1350 | ||
5b4a0ec0 | 1351 | rcu_read_lock(); |
421cb601 | 1352 | |
bec39940 | 1353 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
90eaa0d2 | 1354 | struct lttng_ust_tracepoint_iter uiter; |
ac3bd9c0 | 1355 | |
5b4a0ec0 DG |
1356 | handle = ustctl_tracepoint_list(app->key.sock); |
1357 | if (handle < 0) { | |
1358 | ERR("UST app list events getting handle failed for app pid %d", | |
1359 | app->key.pid); | |
1360 | continue; | |
1361 | } | |
421cb601 | 1362 | |
5b4a0ec0 | 1363 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, |
90eaa0d2 | 1364 | &uiter)) != -ENOENT) { |
815564d8 MD |
1365 | if (count >= nbmem) { |
1366 | DBG2("Reallocating event list from %zu to %zu entries", nbmem, | |
1367 | 2 * nbmem); | |
1368 | nbmem *= 2; | |
2f221590 | 1369 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event)); |
5b4a0ec0 DG |
1370 | if (tmp == NULL) { |
1371 | PERROR("realloc ust app events"); | |
1372 | ret = -ENOMEM; | |
1373 | goto rcu_error; | |
1374 | } | |
1375 | } | |
90eaa0d2 DG |
1376 | memcpy(tmp[count].name, uiter.name, LTTNG_UST_SYM_NAME_LEN); |
1377 | memcpy(tmp[count].loglevel, uiter.loglevel, LTTNG_UST_SYM_NAME_LEN); | |
1378 | tmp[count].loglevel_value = uiter.loglevel_value; | |
5b4a0ec0 DG |
1379 | tmp[count].type = LTTNG_UST_TRACEPOINT; |
1380 | tmp[count].pid = app->key.pid; | |
1381 | tmp[count].enabled = -1; | |
1382 | count++; | |
421cb601 | 1383 | } |
421cb601 DG |
1384 | } |
1385 | ||
5b4a0ec0 DG |
1386 | ret = count; |
1387 | *events = tmp; | |
421cb601 | 1388 | |
5b4a0ec0 | 1389 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1390 | |
5b4a0ec0 DG |
1391 | rcu_error: |
1392 | rcu_read_unlock(); | |
421cb601 | 1393 | error: |
5b4a0ec0 | 1394 | return ret; |
421cb601 DG |
1395 | } |
1396 | ||
5b4a0ec0 DG |
1397 | /* |
1398 | * Free and clean all traceable apps of the global list. | |
1399 | */ | |
1400 | void ust_app_clean_list(void) | |
421cb601 | 1401 | { |
5b4a0ec0 | 1402 | int ret; |
bec39940 DG |
1403 | struct lttng_ht_iter iter; |
1404 | struct lttng_ht_node_ulong *node; | |
421cb601 | 1405 | |
5b4a0ec0 | 1406 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1407 | |
5b4a0ec0 | 1408 | rcu_read_lock(); |
421cb601 | 1409 | |
bec39940 DG |
1410 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, node, node) { |
1411 | ret = lttng_ht_del(ust_app_ht, &iter); | |
525b0740 | 1412 | assert(!ret); |
bec39940 | 1413 | call_rcu(&node->head, delete_ust_app_rcu); |
421cb601 | 1414 | } |
bec39940 DG |
1415 | /* Destroy is done only when the ht is empty */ |
1416 | lttng_ht_destroy(ust_app_ht); | |
421cb601 | 1417 | |
bec39940 DG |
1418 | cds_lfht_for_each_entry(ust_app_sock_key_map->ht, &iter.iter, node, node) { |
1419 | ret = lttng_ht_del(ust_app_sock_key_map, &iter); | |
1420 | assert(!ret); | |
1421 | } | |
1422 | /* Destroy is done only when the ht is empty */ | |
1423 | lttng_ht_destroy(ust_app_sock_key_map); | |
421cb601 | 1424 | |
5b4a0ec0 DG |
1425 | rcu_read_unlock(); |
1426 | } | |
1427 | ||
1428 | /* | |
1429 | * Init UST app hash table. | |
1430 | */ | |
1431 | void ust_app_ht_alloc(void) | |
1432 | { | |
bec39940 DG |
1433 | ust_app_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1434 | ust_app_sock_key_map = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
421cb601 DG |
1435 | } |
1436 | ||
78f0bacd DG |
1437 | /* |
1438 | * For a specific UST session, disable the channel for all registered apps. | |
1439 | */ | |
35a9059d | 1440 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1441 | struct ltt_ust_channel *uchan) |
1442 | { | |
1443 | int ret = 0; | |
bec39940 DG |
1444 | struct lttng_ht_iter iter; |
1445 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1446 | struct ust_app *app; |
1447 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1448 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1449 | |
1450 | if (usess == NULL || uchan == NULL) { | |
1451 | ERR("Disabling UST global channel with NULL values"); | |
1452 | ret = -1; | |
1453 | goto error; | |
1454 | } | |
1455 | ||
a991f516 MD |
1456 | DBG2("UST app disabling channel %s from global domain for session id %d", |
1457 | uchan->name, usess->id); | |
78f0bacd DG |
1458 | |
1459 | rcu_read_lock(); | |
1460 | ||
1461 | /* For every registered applications */ | |
bec39940 DG |
1462 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
1463 | struct lttng_ht_iter uiter; | |
78f0bacd DG |
1464 | ua_sess = lookup_session_by_app(usess, app); |
1465 | if (ua_sess == NULL) { | |
1466 | continue; | |
1467 | } | |
1468 | ||
8535a6d9 | 1469 | /* Get channel */ |
bec39940 DG |
1470 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1471 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
8535a6d9 DG |
1472 | /* If the session if found for the app, the channel must be there */ |
1473 | assert(ua_chan_node); | |
1474 | ||
1475 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1476 | /* The channel must not be already disabled */ | |
1477 | assert(ua_chan->enabled == 1); | |
1478 | ||
1479 | /* Disable channel onto application */ | |
1480 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1481 | if (ret < 0) { |
1482 | /* XXX: We might want to report this error at some point... */ | |
1483 | continue; | |
1484 | } | |
1485 | } | |
1486 | ||
1487 | rcu_read_unlock(); | |
1488 | ||
1489 | error: | |
1490 | return ret; | |
1491 | } | |
1492 | ||
1493 | /* | |
1494 | * For a specific UST session, enable the channel for all registered apps. | |
1495 | */ | |
35a9059d | 1496 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1497 | struct ltt_ust_channel *uchan) |
1498 | { | |
1499 | int ret = 0; | |
bec39940 | 1500 | struct lttng_ht_iter iter; |
78f0bacd DG |
1501 | struct ust_app *app; |
1502 | struct ust_app_session *ua_sess; | |
1503 | ||
1504 | if (usess == NULL || uchan == NULL) { | |
1505 | ERR("Adding UST global channel to NULL values"); | |
1506 | ret = -1; | |
1507 | goto error; | |
1508 | } | |
1509 | ||
a991f516 MD |
1510 | DBG2("UST app enabling channel %s to global domain for session id %d", |
1511 | uchan->name, usess->id); | |
78f0bacd DG |
1512 | |
1513 | rcu_read_lock(); | |
1514 | ||
1515 | /* For every registered applications */ | |
bec39940 | 1516 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
78f0bacd DG |
1517 | ua_sess = lookup_session_by_app(usess, app); |
1518 | if (ua_sess == NULL) { | |
1519 | continue; | |
1520 | } | |
1521 | ||
1522 | /* Enable channel onto application */ | |
1523 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1524 | if (ret < 0) { | |
1525 | /* XXX: We might want to report this error at some point... */ | |
1526 | continue; | |
1527 | } | |
1528 | } | |
1529 | ||
1530 | rcu_read_unlock(); | |
1531 | ||
1532 | error: | |
1533 | return ret; | |
1534 | } | |
1535 | ||
b0a40d28 DG |
1536 | /* |
1537 | * Disable an event in a channel and for a specific session. | |
1538 | */ | |
35a9059d DG |
1539 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
1540 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
1541 | { |
1542 | int ret = 0; | |
bec39940 DG |
1543 | struct lttng_ht_iter iter, uiter; |
1544 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
b0a40d28 DG |
1545 | struct ust_app *app; |
1546 | struct ust_app_session *ua_sess; | |
1547 | struct ust_app_channel *ua_chan; | |
1548 | struct ust_app_event *ua_event; | |
1549 | ||
1550 | DBG("UST app disabling event %s for all apps in channel " | |
a991f516 | 1551 | "%s for session id %d", uevent->attr.name, uchan->name, usess->id); |
b0a40d28 DG |
1552 | |
1553 | rcu_read_lock(); | |
1554 | ||
1555 | /* For all registered applications */ | |
bec39940 | 1556 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
b0a40d28 DG |
1557 | ua_sess = lookup_session_by_app(usess, app); |
1558 | if (ua_sess == NULL) { | |
1559 | /* Next app */ | |
1560 | continue; | |
1561 | } | |
1562 | ||
1563 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1564 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1565 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 | 1566 | if (ua_chan_node == NULL) { |
a991f516 MD |
1567 | DBG2("Channel %s not found in session id %d for app pid %d." |
1568 | "Skipping", uchan->name, usess->id, app->key.pid); | |
b0a40d28 DG |
1569 | continue; |
1570 | } | |
1571 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1572 | ||
bec39940 DG |
1573 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
1574 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 DG |
1575 | if (ua_event_node == NULL) { |
1576 | DBG2("Event %s not found in channel %s for app pid %d." | |
35a9059d | 1577 | "Skipping", uevent->attr.name, uchan->name, app->key.pid); |
b0a40d28 DG |
1578 | continue; |
1579 | } | |
1580 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1581 | ||
7f79d3a1 | 1582 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
b0a40d28 DG |
1583 | if (ret < 0) { |
1584 | /* XXX: Report error someday... */ | |
1585 | continue; | |
1586 | } | |
1587 | } | |
1588 | ||
1589 | rcu_read_unlock(); | |
1590 | ||
1591 | return ret; | |
1592 | } | |
1593 | ||
9730260e | 1594 | /* |
edb67388 | 1595 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
1596 | * registered apps. |
1597 | */ | |
35a9059d | 1598 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
1599 | struct ltt_ust_channel *uchan) |
1600 | { | |
1601 | int ret = 0; | |
bec39940 DG |
1602 | struct lttng_ht_iter iter, uiter; |
1603 | struct lttng_ht_node_str *ua_chan_node; | |
9730260e DG |
1604 | struct ust_app *app; |
1605 | struct ust_app_session *ua_sess; | |
1606 | struct ust_app_channel *ua_chan; | |
1607 | struct ust_app_event *ua_event; | |
1608 | ||
1609 | DBG("UST app disabling all event for all apps in channel " | |
a991f516 | 1610 | "%s for session id %d", uchan->name, usess->id); |
9730260e DG |
1611 | |
1612 | rcu_read_lock(); | |
1613 | ||
1614 | /* For all registered applications */ | |
bec39940 | 1615 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
9730260e | 1616 | ua_sess = lookup_session_by_app(usess, app); |
edb67388 DG |
1617 | /* If ua_sess is NULL, there is a code flow error */ |
1618 | assert(ua_sess); | |
9730260e DG |
1619 | |
1620 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1621 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1622 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1623 | /* If the channel is not found, there is a code flow error */ |
1624 | assert(ua_chan_node); | |
1625 | ||
9730260e DG |
1626 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1627 | ||
1628 | /* Disable each events of channel */ | |
bec39940 DG |
1629 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
1630 | node.node) { | |
7f79d3a1 | 1631 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
9730260e DG |
1632 | if (ret < 0) { |
1633 | /* XXX: Report error someday... */ | |
1634 | continue; | |
1635 | } | |
1636 | } | |
1637 | } | |
1638 | ||
1639 | rcu_read_unlock(); | |
1640 | ||
1641 | return ret; | |
1642 | } | |
1643 | ||
421cb601 | 1644 | /* |
5b4a0ec0 | 1645 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1646 | */ |
35a9059d | 1647 | int ust_app_create_channel_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1648 | struct ltt_ust_channel *uchan) |
1649 | { | |
1650 | int ret = 0; | |
bec39940 | 1651 | struct lttng_ht_iter iter; |
48842b30 DG |
1652 | struct ust_app *app; |
1653 | struct ust_app_session *ua_sess; | |
1654 | struct ust_app_channel *ua_chan; | |
1655 | ||
421cb601 DG |
1656 | if (usess == NULL || uchan == NULL) { |
1657 | ERR("Adding UST global channel to NULL values"); | |
1658 | ret = -1; | |
1659 | goto error; | |
1660 | } | |
1661 | ||
a991f516 MD |
1662 | DBG2("UST app adding channel %s to global domain for session id %d", |
1663 | uchan->name, usess->id); | |
48842b30 DG |
1664 | |
1665 | rcu_read_lock(); | |
421cb601 | 1666 | |
5b4a0ec0 | 1667 | /* For every registered applications */ |
bec39940 | 1668 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
edb67388 DG |
1669 | /* |
1670 | * Create session on the tracer side and add it to app session HT. Note | |
1671 | * that if session exist, it will simply return a pointer to the ust | |
1672 | * app session. | |
1673 | */ | |
421cb601 | 1674 | ua_sess = create_ust_app_session(usess, app); |
509cbaf8 | 1675 | if (ua_sess == NULL) { |
5b4a0ec0 | 1676 | continue; |
48842b30 DG |
1677 | } |
1678 | ||
421cb601 DG |
1679 | /* Create channel onto application */ |
1680 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1681 | if (ua_chan == NULL) { | |
5b4a0ec0 | 1682 | continue; |
48842b30 | 1683 | } |
48842b30 | 1684 | } |
5b4a0ec0 | 1685 | |
48842b30 DG |
1686 | rcu_read_unlock(); |
1687 | ||
421cb601 | 1688 | error: |
48842b30 DG |
1689 | return ret; |
1690 | } | |
1691 | ||
5b4a0ec0 | 1692 | /* |
edb67388 | 1693 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 1694 | */ |
35a9059d | 1695 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1696 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1697 | { | |
1698 | int ret = 0; | |
bec39940 DG |
1699 | struct lttng_ht_iter iter, uiter; |
1700 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
48842b30 DG |
1701 | struct ust_app *app; |
1702 | struct ust_app_session *ua_sess; | |
1703 | struct ust_app_channel *ua_chan; | |
1704 | struct ust_app_event *ua_event; | |
48842b30 | 1705 | |
a991f516 MD |
1706 | DBG("UST app enabling event %s for all apps for session id %d", |
1707 | uevent->attr.name, usess->id); | |
48842b30 | 1708 | |
edb67388 DG |
1709 | /* |
1710 | * NOTE: At this point, this function is called only if the session and | |
1711 | * channel passed are already created for all apps. and enabled on the | |
1712 | * tracer also. | |
1713 | */ | |
1714 | ||
48842b30 | 1715 | rcu_read_lock(); |
421cb601 DG |
1716 | |
1717 | /* For all registered applications */ | |
bec39940 | 1718 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
edb67388 DG |
1719 | ua_sess = lookup_session_by_app(usess, app); |
1720 | /* If ua_sess is NULL, there is a code flow error */ | |
1721 | assert(ua_sess); | |
ba767faf | 1722 | |
edb67388 | 1723 | /* Lookup channel in the ust app session */ |
bec39940 DG |
1724 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1725 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1726 | /* If the channel is not found, there is a code flow error */ |
1727 | assert(ua_chan_node); | |
1728 | ||
1729 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1730 | ||
bec39940 DG |
1731 | lttng_ht_lookup(ua_chan->events, (void*)uevent->attr.name, &uiter); |
1732 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
35a9059d | 1733 | if (ua_event_node == NULL) { |
7f79d3a1 DG |
1734 | DBG3("UST app enable event %s not found for app PID %d." |
1735 | "Skipping app", uevent->attr.name, app->key.pid); | |
35a9059d DG |
1736 | continue; |
1737 | } | |
1738 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1739 | ||
1740 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
1741 | if (ret < 0) { | |
7f79d3a1 | 1742 | goto error; |
48842b30 | 1743 | } |
edb67388 DG |
1744 | } |
1745 | ||
7f79d3a1 | 1746 | error: |
edb67388 | 1747 | rcu_read_unlock(); |
edb67388 DG |
1748 | return ret; |
1749 | } | |
1750 | ||
1751 | /* | |
1752 | * For a specific existing UST session and UST channel, creates the event for | |
1753 | * all registered apps. | |
1754 | */ | |
35a9059d | 1755 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
1756 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1757 | { | |
1758 | int ret = 0; | |
bec39940 DG |
1759 | struct lttng_ht_iter iter, uiter; |
1760 | struct lttng_ht_node_str *ua_chan_node; | |
edb67388 DG |
1761 | struct ust_app *app; |
1762 | struct ust_app_session *ua_sess; | |
1763 | struct ust_app_channel *ua_chan; | |
1764 | ||
a991f516 MD |
1765 | DBG("UST app creating event %s for all apps for session id %d", |
1766 | uevent->attr.name, usess->id); | |
edb67388 DG |
1767 | |
1768 | /* | |
1769 | * NOTE: At this point, this function is called only if the session and | |
1770 | * channel passed are already created for all apps. and enabled on the | |
1771 | * tracer also. | |
1772 | */ | |
1773 | ||
1774 | rcu_read_lock(); | |
1775 | ||
1776 | /* For all registered applications */ | |
bec39940 | 1777 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
edb67388 DG |
1778 | ua_sess = lookup_session_by_app(usess, app); |
1779 | /* If ua_sess is NULL, there is a code flow error */ | |
1780 | assert(ua_sess); | |
48842b30 DG |
1781 | |
1782 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1783 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1784 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1785 | /* If the channel is not found, there is a code flow error */ |
1786 | assert(ua_chan_node); | |
1787 | ||
48842b30 DG |
1788 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1789 | ||
edb67388 DG |
1790 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1791 | if (ret < 0) { | |
5b4a0ec0 | 1792 | continue; |
48842b30 | 1793 | } |
48842b30 | 1794 | } |
5b4a0ec0 | 1795 | |
48842b30 DG |
1796 | rcu_read_unlock(); |
1797 | ||
1798 | return ret; | |
1799 | } | |
1800 | ||
5b4a0ec0 DG |
1801 | /* |
1802 | * Start tracing for a specific UST session and app. | |
1803 | */ | |
421cb601 | 1804 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1805 | { |
1806 | int ret = 0; | |
bec39940 | 1807 | struct lttng_ht_iter iter; |
48842b30 DG |
1808 | struct ust_app_session *ua_sess; |
1809 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 1810 | struct ltt_ust_stream *ustream; |
7753dea8 | 1811 | int consumerd_fd; |
48842b30 | 1812 | |
421cb601 | 1813 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 1814 | |
509cbaf8 MD |
1815 | rcu_read_lock(); |
1816 | ||
421cb601 DG |
1817 | ua_sess = lookup_session_by_app(usess, app); |
1818 | if (ua_sess == NULL) { | |
509cbaf8 | 1819 | goto error_rcu_unlock; |
421cb601 | 1820 | } |
48842b30 | 1821 | |
aea829b3 DG |
1822 | /* Upon restart, we skip the setup, already done */ |
1823 | if (ua_sess->started) { | |
8be98f9a | 1824 | goto skip_setup; |
aea829b3 | 1825 | } |
8be98f9a | 1826 | |
421cb601 DG |
1827 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1828 | if (ret < 0) { | |
509cbaf8 | 1829 | goto error_rcu_unlock; |
421cb601 | 1830 | } |
48842b30 | 1831 | |
421cb601 | 1832 | /* For each channel */ |
bec39940 DG |
1833 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
1834 | node.node) { | |
421cb601 DG |
1835 | /* Create all streams */ |
1836 | while (1) { | |
5b4a0ec0 | 1837 | /* Create UST stream */ |
421cb601 DG |
1838 | ustream = zmalloc(sizeof(*ustream)); |
1839 | if (ustream == NULL) { | |
1840 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1841 | goto error_rcu_unlock; |
421cb601 | 1842 | } |
48842b30 | 1843 | |
421cb601 DG |
1844 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
1845 | &ustream->obj); | |
48842b30 | 1846 | if (ret < 0) { |
421cb601 DG |
1847 | /* Got all streams */ |
1848 | break; | |
48842b30 | 1849 | } |
421cb601 | 1850 | ustream->handle = ustream->obj->handle; |
48842b30 | 1851 | |
421cb601 DG |
1852 | /* Order is important */ |
1853 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
477d7741 MD |
1854 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", |
1855 | ua_sess->path, ua_chan->name, | |
1856 | ua_chan->streams.count++); | |
aba8e916 DG |
1857 | if (ret < 0) { |
1858 | PERROR("asprintf UST create stream"); | |
421cb601 | 1859 | continue; |
aba8e916 | 1860 | } |
421cb601 DG |
1861 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1862 | ustream->pathname); | |
1863 | } | |
421cb601 | 1864 | } |
aba8e916 | 1865 | |
7753dea8 MD |
1866 | switch (app->bits_per_long) { |
1867 | case 64: | |
1868 | consumerd_fd = ust_consumerd64_fd; | |
1869 | break; | |
1870 | case 32: | |
1871 | consumerd_fd = ust_consumerd32_fd; | |
1872 | break; | |
1873 | default: | |
1874 | ret = -EINVAL; | |
1875 | goto error_rcu_unlock; | |
1876 | } | |
aea829b3 | 1877 | |
421cb601 | 1878 | /* Setup UST consumer socket and send fds to it */ |
7753dea8 | 1879 | ret = ust_consumer_send_session(consumerd_fd, ua_sess); |
421cb601 | 1880 | if (ret < 0) { |
509cbaf8 | 1881 | goto error_rcu_unlock; |
421cb601 | 1882 | } |
8be98f9a | 1883 | ua_sess->started = 1; |
48842b30 | 1884 | |
8be98f9a | 1885 | skip_setup: |
421cb601 DG |
1886 | /* This start the UST tracing */ |
1887 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
1888 | if (ret < 0) { | |
1889 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 1890 | goto error_rcu_unlock; |
421cb601 | 1891 | } |
5b4a0ec0 | 1892 | |
509cbaf8 | 1893 | rcu_read_unlock(); |
48842b30 | 1894 | |
421cb601 DG |
1895 | /* Quiescent wait after starting trace */ |
1896 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 1897 | |
421cb601 | 1898 | return 0; |
48842b30 | 1899 | |
509cbaf8 MD |
1900 | error_rcu_unlock: |
1901 | rcu_read_unlock(); | |
421cb601 DG |
1902 | return -1; |
1903 | } | |
48842b30 | 1904 | |
8be98f9a MD |
1905 | /* |
1906 | * Stop tracing for a specific UST session and app. | |
1907 | */ | |
1908 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1909 | { | |
1910 | int ret = 0; | |
bec39940 | 1911 | struct lttng_ht_iter iter; |
8be98f9a | 1912 | struct ust_app_session *ua_sess; |
6d3686da | 1913 | struct ust_app_channel *ua_chan; |
8be98f9a MD |
1914 | |
1915 | DBG("Stopping tracing for ust app pid %d", app->key.pid); | |
1916 | ||
1917 | rcu_read_lock(); | |
1918 | ||
1919 | ua_sess = lookup_session_by_app(usess, app); | |
1920 | if (ua_sess == NULL) { | |
1921 | /* Only malloc can failed so something is really wrong */ | |
1922 | goto error_rcu_unlock; | |
1923 | } | |
1924 | ||
9d6c7d3f DG |
1925 | /* This inhibits UST tracing */ |
1926 | ret = ustctl_stop_session(app->key.sock, ua_sess->handle); | |
1927 | if (ret < 0) { | |
1928 | ERR("Error stopping tracing for app pid: %d", app->key.pid); | |
1929 | goto error_rcu_unlock; | |
1930 | } | |
1931 | ||
1932 | /* Quiescent wait after stopping trace */ | |
1933 | ustctl_wait_quiescent(app->key.sock); | |
1934 | ||
1935 | /* Flushing buffers */ | |
bec39940 DG |
1936 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
1937 | node.node) { | |
6d3686da | 1938 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_chan->obj); |
8be98f9a | 1939 | if (ret < 0) { |
6d3686da DG |
1940 | ERR("UST app PID %d channel %s flush failed", |
1941 | app->key.pid, ua_chan->name); | |
1942 | ERR("Ended with ret %d", ret); | |
1943 | /* Continuing flushing all buffers */ | |
1944 | continue; | |
8be98f9a MD |
1945 | } |
1946 | } | |
8be98f9a | 1947 | |
90d97d10 DG |
1948 | /* Flush all buffers before stopping */ |
1949 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_sess->metadata->obj); | |
1950 | if (ret < 0) { | |
1951 | ERR("UST app PID %d metadata flush failed", app->key.pid); | |
1952 | ERR("Ended with ret %d", ret); | |
1953 | } | |
1954 | ||
9d6c7d3f DG |
1955 | rcu_read_unlock(); |
1956 | ||
8be98f9a MD |
1957 | return 0; |
1958 | ||
1959 | error_rcu_unlock: | |
1960 | rcu_read_unlock(); | |
1961 | return -1; | |
1962 | } | |
1963 | ||
84cd17c6 MD |
1964 | /* |
1965 | * Destroy a specific UST session in apps. | |
1966 | */ | |
1967 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1968 | { | |
1969 | struct ust_app_session *ua_sess; | |
1970 | struct lttng_ust_object_data obj; | |
bec39940 DG |
1971 | struct lttng_ht_iter iter; |
1972 | struct lttng_ht_node_ulong *node; | |
525b0740 | 1973 | int ret; |
84cd17c6 MD |
1974 | |
1975 | DBG("Destroy tracing for ust app pid %d", app->key.pid); | |
1976 | ||
1977 | rcu_read_lock(); | |
1978 | ||
1979 | __lookup_session_by_app(usess, app, &iter); | |
bec39940 | 1980 | node = lttng_ht_iter_get_node_ulong(&iter); |
84cd17c6 MD |
1981 | if (node == NULL) { |
1982 | /* Only malloc can failed so something is really wrong */ | |
1983 | goto error_rcu_unlock; | |
1984 | } | |
1985 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
bec39940 | 1986 | ret = lttng_ht_del(app->sessions, &iter); |
525b0740 | 1987 | assert(!ret); |
84cd17c6 MD |
1988 | delete_ust_app_session(app->key.sock, ua_sess); |
1989 | obj.handle = ua_sess->handle; | |
1990 | obj.shm_fd = -1; | |
1991 | obj.wait_fd = -1; | |
1992 | obj.memory_map_size = 0; | |
1993 | ustctl_release_object(app->key.sock, &obj); | |
1994 | ||
1995 | rcu_read_unlock(); | |
1996 | ||
1997 | /* Quiescent wait after stopping trace */ | |
1998 | ustctl_wait_quiescent(app->key.sock); | |
1999 | ||
2000 | return 0; | |
2001 | ||
2002 | error_rcu_unlock: | |
2003 | rcu_read_unlock(); | |
2004 | return -1; | |
2005 | } | |
2006 | ||
5b4a0ec0 DG |
2007 | /* |
2008 | * Start tracing for the UST session. | |
2009 | */ | |
421cb601 DG |
2010 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
2011 | { | |
2012 | int ret = 0; | |
bec39940 | 2013 | struct lttng_ht_iter iter; |
421cb601 | 2014 | struct ust_app *app; |
48842b30 | 2015 | |
421cb601 DG |
2016 | DBG("Starting all UST traces"); |
2017 | ||
2018 | rcu_read_lock(); | |
421cb601 | 2019 | |
bec39940 | 2020 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
421cb601 | 2021 | ret = ust_app_start_trace(usess, app); |
48842b30 | 2022 | if (ret < 0) { |
5b4a0ec0 DG |
2023 | /* Continue to next apps even on error */ |
2024 | continue; | |
48842b30 | 2025 | } |
48842b30 | 2026 | } |
5b4a0ec0 | 2027 | |
48842b30 DG |
2028 | rcu_read_unlock(); |
2029 | ||
2030 | return 0; | |
2031 | } | |
487cf67c | 2032 | |
8be98f9a MD |
2033 | /* |
2034 | * Start tracing for the UST session. | |
2035 | */ | |
2036 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
2037 | { | |
2038 | int ret = 0; | |
bec39940 | 2039 | struct lttng_ht_iter iter; |
8be98f9a MD |
2040 | struct ust_app *app; |
2041 | ||
2042 | DBG("Stopping all UST traces"); | |
2043 | ||
2044 | rcu_read_lock(); | |
2045 | ||
bec39940 | 2046 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
8be98f9a MD |
2047 | ret = ust_app_stop_trace(usess, app); |
2048 | if (ret < 0) { | |
2049 | /* Continue to next apps even on error */ | |
2050 | continue; | |
2051 | } | |
2052 | } | |
2053 | ||
2054 | rcu_read_unlock(); | |
2055 | ||
2056 | return 0; | |
2057 | } | |
2058 | ||
84cd17c6 MD |
2059 | /* |
2060 | * Destroy app UST session. | |
2061 | */ | |
2062 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
2063 | { | |
2064 | int ret = 0; | |
bec39940 | 2065 | struct lttng_ht_iter iter; |
84cd17c6 MD |
2066 | struct ust_app *app; |
2067 | ||
2068 | DBG("Destroy all UST traces"); | |
2069 | ||
2070 | rcu_read_lock(); | |
2071 | ||
bec39940 | 2072 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
84cd17c6 MD |
2073 | ret = ust_app_destroy_trace(usess, app); |
2074 | if (ret < 0) { | |
2075 | /* Continue to next apps even on error */ | |
2076 | continue; | |
2077 | } | |
2078 | } | |
2079 | ||
2080 | rcu_read_unlock(); | |
2081 | ||
2082 | return 0; | |
2083 | } | |
2084 | ||
5b4a0ec0 DG |
2085 | /* |
2086 | * Add channels/events from UST global domain to registered apps at sock. | |
2087 | */ | |
487cf67c DG |
2088 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
2089 | { | |
2090 | int ret = 0; | |
bec39940 | 2091 | struct lttng_ht_iter iter, uiter; |
487cf67c DG |
2092 | struct ust_app *app; |
2093 | struct ust_app_session *ua_sess; | |
2094 | struct ust_app_channel *ua_chan; | |
2095 | struct ust_app_event *ua_event; | |
1f3580c7 DG |
2096 | |
2097 | if (usess == NULL) { | |
5b4a0ec0 | 2098 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
2099 | goto error; |
2100 | } | |
2101 | ||
a991f516 MD |
2102 | DBG2("UST app global update for app sock %d for session id %d", sock, |
2103 | usess->id); | |
487cf67c | 2104 | |
284d8f55 DG |
2105 | rcu_read_lock(); |
2106 | ||
487cf67c DG |
2107 | app = find_app_by_sock(sock); |
2108 | if (app == NULL) { | |
2109 | ERR("Failed to update app sock %d", sock); | |
2110 | goto error; | |
2111 | } | |
2112 | ||
421cb601 | 2113 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 2114 | if (ua_sess == NULL) { |
487cf67c DG |
2115 | goto error; |
2116 | } | |
2117 | ||
284d8f55 DG |
2118 | /* |
2119 | * We can iterate safely here over all UST app session sicne the create ust | |
2120 | * app session above made a shadow copy of the UST global domain from the | |
2121 | * ltt ust session. | |
2122 | */ | |
bec39940 DG |
2123 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2124 | node.node) { | |
284d8f55 DG |
2125 | ret = create_ust_channel(app, ua_sess, ua_chan); |
2126 | if (ret < 0) { | |
2127 | /* FIXME: Should we quit here or continue... */ | |
2128 | continue; | |
487cf67c DG |
2129 | } |
2130 | ||
284d8f55 | 2131 | /* For each events */ |
bec39940 DG |
2132 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
2133 | node.node) { | |
284d8f55 DG |
2134 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
2135 | if (ret < 0) { | |
2136 | /* FIXME: Should we quit here or continue... */ | |
2137 | continue; | |
487cf67c | 2138 | } |
36dc12cc | 2139 | } |
487cf67c DG |
2140 | } |
2141 | ||
36dc12cc | 2142 | if (usess->start_trace) { |
421cb601 | 2143 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 2144 | if (ret < 0) { |
36dc12cc DG |
2145 | goto error; |
2146 | } | |
2147 | ||
36dc12cc DG |
2148 | DBG2("UST trace started for app pid %d", app->key.pid); |
2149 | } | |
2150 | ||
487cf67c DG |
2151 | error: |
2152 | rcu_read_unlock(); | |
2153 | return; | |
2154 | } | |
55cc08a6 DG |
2155 | |
2156 | /* | |
2157 | * Add context to a specific channel for global UST domain. | |
2158 | */ | |
2159 | int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess, | |
2160 | struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx) | |
2161 | { | |
2162 | int ret = 0; | |
bec39940 DG |
2163 | struct lttng_ht_node_str *ua_chan_node; |
2164 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2165 | struct ust_app_channel *ua_chan = NULL; |
2166 | struct ust_app_session *ua_sess; | |
2167 | struct ust_app *app; | |
2168 | ||
2169 | rcu_read_lock(); | |
2170 | ||
bec39940 | 2171 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
55cc08a6 DG |
2172 | ua_sess = lookup_session_by_app(usess, app); |
2173 | if (ua_sess == NULL) { | |
2174 | continue; | |
2175 | } | |
2176 | ||
2177 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2178 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2179 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2180 | if (ua_chan_node == NULL) { |
2181 | continue; | |
2182 | } | |
2183 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2184 | node); | |
2185 | ||
2186 | ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app); | |
2187 | if (ret < 0) { | |
2188 | continue; | |
2189 | } | |
2190 | } | |
2191 | ||
55cc08a6 DG |
2192 | rcu_read_unlock(); |
2193 | return ret; | |
2194 | } | |
2195 | ||
2196 | /* | |
2197 | * Add context to a specific event in a channel for global UST domain. | |
2198 | */ | |
2199 | int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess, | |
2200 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
2201 | struct ltt_ust_context *uctx) | |
2202 | { | |
2203 | int ret = 0; | |
bec39940 DG |
2204 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; |
2205 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2206 | struct ust_app_session *ua_sess; |
2207 | struct ust_app_event *ua_event; | |
2208 | struct ust_app_channel *ua_chan = NULL; | |
2209 | struct ust_app *app; | |
2210 | ||
2211 | rcu_read_lock(); | |
2212 | ||
bec39940 | 2213 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
55cc08a6 DG |
2214 | ua_sess = lookup_session_by_app(usess, app); |
2215 | if (ua_sess == NULL) { | |
2216 | continue; | |
2217 | } | |
2218 | ||
2219 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2220 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2221 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2222 | if (ua_chan_node == NULL) { |
2223 | continue; | |
2224 | } | |
2225 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2226 | node); | |
2227 | ||
bec39940 DG |
2228 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
2229 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2230 | if (ua_event_node == NULL) { |
2231 | continue; | |
2232 | } | |
2233 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, | |
2234 | node); | |
2235 | ||
2236 | ret = create_ust_app_event_context(ua_sess, ua_event, &uctx->ctx, app); | |
2237 | if (ret < 0) { | |
2238 | continue; | |
2239 | } | |
2240 | } | |
2241 | ||
55cc08a6 DG |
2242 | rcu_read_unlock(); |
2243 | return ret; | |
2244 | } | |
76d45b40 DG |
2245 | |
2246 | /* | |
2247 | * Enable event for a channel from a UST session for a specific PID. | |
2248 | */ | |
2249 | int ust_app_enable_event_pid(struct ltt_ust_session *usess, | |
2250 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2251 | { | |
2252 | int ret = 0; | |
bec39940 DG |
2253 | struct lttng_ht_iter iter; |
2254 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
76d45b40 DG |
2255 | struct ust_app *app; |
2256 | struct ust_app_session *ua_sess; | |
2257 | struct ust_app_channel *ua_chan; | |
2258 | struct ust_app_event *ua_event; | |
2259 | ||
2260 | DBG("UST app enabling event %s for PID %d", uevent->attr.name, pid); | |
2261 | ||
2262 | rcu_read_lock(); | |
2263 | ||
2264 | app = ust_app_find_by_pid(pid); | |
2265 | if (app == NULL) { | |
2266 | ERR("UST app enable event per PID %d not found", pid); | |
2267 | ret = -1; | |
2268 | goto error; | |
2269 | } | |
2270 | ||
2271 | ua_sess = lookup_session_by_app(usess, app); | |
2272 | /* If ua_sess is NULL, there is a code flow error */ | |
2273 | assert(ua_sess); | |
2274 | ||
2275 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2276 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2277 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2278 | /* If the channel is not found, there is a code flow error */ |
2279 | assert(ua_chan_node); | |
2280 | ||
2281 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2282 | ||
bec39940 DG |
2283 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2284 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2285 | if (ua_event_node == NULL) { |
2286 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); | |
2287 | if (ret < 0) { | |
2288 | goto error; | |
2289 | } | |
2290 | } else { | |
2291 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2292 | ||
2293 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2294 | if (ret < 0) { | |
2295 | goto error; | |
2296 | } | |
2297 | } | |
2298 | ||
2299 | error: | |
2300 | rcu_read_unlock(); | |
2301 | return ret; | |
2302 | } | |
7f79d3a1 DG |
2303 | |
2304 | /* | |
2305 | * Disable event for a channel from a UST session for a specific PID. | |
2306 | */ | |
2307 | int ust_app_disable_event_pid(struct ltt_ust_session *usess, | |
2308 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2309 | { | |
2310 | int ret = 0; | |
bec39940 DG |
2311 | struct lttng_ht_iter iter; |
2312 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
7f79d3a1 DG |
2313 | struct ust_app *app; |
2314 | struct ust_app_session *ua_sess; | |
2315 | struct ust_app_channel *ua_chan; | |
2316 | struct ust_app_event *ua_event; | |
2317 | ||
2318 | DBG("UST app disabling event %s for PID %d", uevent->attr.name, pid); | |
2319 | ||
2320 | rcu_read_lock(); | |
2321 | ||
2322 | app = ust_app_find_by_pid(pid); | |
2323 | if (app == NULL) { | |
2324 | ERR("UST app disable event per PID %d not found", pid); | |
2325 | ret = -1; | |
2326 | goto error; | |
2327 | } | |
2328 | ||
2329 | ua_sess = lookup_session_by_app(usess, app); | |
2330 | /* If ua_sess is NULL, there is a code flow error */ | |
2331 | assert(ua_sess); | |
2332 | ||
2333 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2334 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2335 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2336 | if (ua_chan_node == NULL) { |
2337 | /* Channel does not exist, skip disabling */ | |
2338 | goto error; | |
2339 | } | |
2340 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2341 | ||
bec39940 DG |
2342 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2343 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2344 | if (ua_event_node == NULL) { |
2345 | /* Event does not exist, skip disabling */ | |
2346 | goto error; | |
2347 | } | |
2348 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2349 | ||
2350 | ret = disable_ust_app_event(ua_sess, ua_event, app); | |
2351 | if (ret < 0) { | |
2352 | goto error; | |
2353 | } | |
2354 | ||
2355 | error: | |
2356 | rcu_read_unlock(); | |
2357 | return ret; | |
2358 | } |