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 | 594 | ua_chan->handle = ua_chan->obj->handle; |
b551a063 | 595 | |
5b4a0ec0 DG |
596 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
597 | ua_chan->name, app->key.pid, app->key.sock); | |
b551a063 | 598 | |
8535a6d9 DG |
599 | /* If channel is not enabled, disable it on the tracer */ |
600 | if (!ua_chan->enabled) { | |
601 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
602 | if (ret < 0) { | |
603 | goto error; | |
604 | } | |
605 | } | |
606 | ||
b551a063 DG |
607 | error: |
608 | return ret; | |
609 | } | |
610 | ||
91d76f53 | 611 | /* |
5b4a0ec0 | 612 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 613 | */ |
edb67388 DG |
614 | static |
615 | int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess, | |
616 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event) | |
91d76f53 | 617 | { |
5b4a0ec0 | 618 | int ret = 0; |
284d8f55 | 619 | |
5b4a0ec0 DG |
620 | /* Create UST event on tracer */ |
621 | ret = ustctl_create_event(app->key.sock, &ua_event->attr, ua_chan->obj, | |
622 | &ua_event->obj); | |
623 | if (ret < 0) { | |
624 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
625 | ua_event->attr.name, app->key.pid, ret); | |
626 | goto error; | |
91d76f53 | 627 | } |
f6a9efaa | 628 | |
5b4a0ec0 | 629 | ua_event->handle = ua_event->obj->handle; |
284d8f55 | 630 | |
5b4a0ec0 DG |
631 | DBG2("UST app event %s created successfully for pid:%d", |
632 | ua_event->attr.name, app->key.pid); | |
f6a9efaa | 633 | |
8535a6d9 DG |
634 | /* If event not enabled, disable it on the tracer */ |
635 | if (!ua_event->enabled) { | |
636 | ret = disable_ust_event(app, ua_sess, ua_event); | |
637 | if (ret < 0) { | |
638 | goto error; | |
639 | } | |
640 | } | |
641 | ||
5b4a0ec0 DG |
642 | error: |
643 | return ret; | |
91d76f53 | 644 | } |
48842b30 | 645 | |
5b4a0ec0 DG |
646 | /* |
647 | * Copy data between an UST app event and a LTT event. | |
648 | */ | |
421cb601 | 649 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
650 | struct ltt_ust_event *uevent) |
651 | { | |
bec39940 | 652 | struct lttng_ht_iter iter; |
55cc08a6 DG |
653 | struct ltt_ust_context *uctx; |
654 | struct ust_app_ctx *ua_ctx; | |
655 | ||
48842b30 DG |
656 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); |
657 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
658 | ||
5b4a0ec0 DG |
659 | /* Copy event attributes */ |
660 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
661 | ||
bec39940 | 662 | cds_lfht_for_each_entry(uevent->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
663 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
664 | if (ua_ctx == NULL) { | |
665 | continue; | |
666 | } | |
bec39940 DG |
667 | lttng_ht_node_init_ulong(&ua_ctx->node, |
668 | (unsigned long) ua_ctx->ctx.ctx); | |
669 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 | 670 | } |
48842b30 DG |
671 | } |
672 | ||
5b4a0ec0 DG |
673 | /* |
674 | * Copy data between an UST app channel and a LTT channel. | |
675 | */ | |
421cb601 | 676 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
677 | struct ltt_ust_channel *uchan) |
678 | { | |
bec39940 DG |
679 | struct lttng_ht_iter iter; |
680 | struct lttng_ht_node_str *ua_event_node; | |
48842b30 | 681 | struct ltt_ust_event *uevent; |
55cc08a6 | 682 | struct ltt_ust_context *uctx; |
48842b30 | 683 | struct ust_app_event *ua_event; |
55cc08a6 | 684 | struct ust_app_ctx *ua_ctx; |
48842b30 | 685 | |
421cb601 | 686 | DBG2("Shadow copy of UST app channel %s", ua_chan->name); |
48842b30 DG |
687 | |
688 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
689 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
690 | /* Copy event attributes */ |
691 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 | 692 | |
bec39940 | 693 | cds_lfht_for_each_entry(uchan->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
694 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
695 | if (ua_ctx == NULL) { | |
696 | continue; | |
697 | } | |
bec39940 DG |
698 | lttng_ht_node_init_ulong(&ua_ctx->node, |
699 | (unsigned long) ua_ctx->ctx.ctx); | |
700 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 | 701 | } |
48842b30 | 702 | |
421cb601 | 703 | /* Copy all events from ltt ust channel to ust app channel */ |
bec39940 DG |
704 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
705 | struct lttng_ht_iter uiter; | |
ba767faf | 706 | |
bec39940 DG |
707 | lttng_ht_lookup(ua_chan->events, (void *) uevent->attr.name, &uiter); |
708 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
48842b30 | 709 | if (ua_event_node == NULL) { |
421cb601 | 710 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 711 | uevent->attr.name); |
284d8f55 | 712 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 713 | if (ua_event == NULL) { |
5b4a0ec0 | 714 | continue; |
48842b30 | 715 | } |
421cb601 | 716 | shadow_copy_event(ua_event, uevent); |
bec39940 | 717 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
48842b30 | 718 | } |
48842b30 DG |
719 | } |
720 | ||
421cb601 | 721 | DBG3("Shadow copy channel done"); |
48842b30 DG |
722 | } |
723 | ||
5b4a0ec0 DG |
724 | /* |
725 | * Copy data between a UST app session and a regular LTT session. | |
726 | */ | |
421cb601 | 727 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
bec39940 | 728 | struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 | 729 | { |
bec39940 DG |
730 | struct lttng_ht_node_str *ua_chan_node; |
731 | struct lttng_ht_iter iter; | |
48842b30 DG |
732 | struct ltt_ust_channel *uchan; |
733 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
734 | time_t rawtime; |
735 | struct tm *timeinfo; | |
736 | char datetime[16]; | |
737 | int ret; | |
738 | ||
739 | /* Get date and time for unique app path */ | |
740 | time(&rawtime); | |
741 | timeinfo = localtime(&rawtime); | |
742 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 743 | |
421cb601 | 744 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 | 745 | |
a991f516 | 746 | ua_sess->id = usess->id; |
6df2e2c9 MD |
747 | ua_sess->uid = usess->uid; |
748 | ua_sess->gid = usess->gid; | |
48842b30 | 749 | |
477d7741 MD |
750 | ret = snprintf(ua_sess->path, PATH_MAX, |
751 | "%s/%s-%d-%s", | |
752 | usess->pathname, app->name, app->key.pid, | |
753 | datetime); | |
754 | if (ret < 0) { | |
755 | PERROR("asprintf UST shadow copy session"); | |
756 | /* TODO: We cannot return an error from here.. */ | |
757 | assert(0); | |
758 | } | |
759 | ||
48842b30 DG |
760 | /* TODO: support all UST domain */ |
761 | ||
762 | /* Iterate over all channels in global domain. */ | |
bec39940 DG |
763 | cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter, |
764 | uchan, node.node) { | |
765 | struct lttng_ht_iter uiter; | |
ba767faf | 766 | |
bec39940 DG |
767 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
768 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
5b4a0ec0 DG |
769 | if (ua_chan_node != NULL) { |
770 | continue; | |
771 | } | |
421cb601 | 772 | |
5b4a0ec0 DG |
773 | DBG2("Channel %s not found on shadow session copy, creating it", |
774 | uchan->name); | |
775 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
776 | if (ua_chan == NULL) { | |
777 | /* malloc failed... continuing */ | |
778 | continue; | |
48842b30 DG |
779 | } |
780 | ||
5b4a0ec0 | 781 | shadow_copy_channel(ua_chan, uchan); |
bec39940 | 782 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
48842b30 DG |
783 | } |
784 | } | |
785 | ||
78f0bacd DG |
786 | /* |
787 | * Lookup sesison wrapper. | |
788 | */ | |
84cd17c6 MD |
789 | static |
790 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
bec39940 | 791 | struct ust_app *app, struct lttng_ht_iter *iter) |
84cd17c6 MD |
792 | { |
793 | /* Get right UST app session from app */ | |
2c348c10 | 794 | lttng_ht_lookup(app->sessions, (void *)((unsigned long) usess->id), iter); |
84cd17c6 MD |
795 | } |
796 | ||
421cb601 DG |
797 | /* |
798 | * Return ust app session from the app session hashtable using the UST session | |
a991f516 | 799 | * id. |
421cb601 | 800 | */ |
48842b30 DG |
801 | static struct ust_app_session *lookup_session_by_app( |
802 | struct ltt_ust_session *usess, struct ust_app *app) | |
803 | { | |
bec39940 DG |
804 | struct lttng_ht_iter iter; |
805 | struct lttng_ht_node_ulong *node; | |
48842b30 | 806 | |
84cd17c6 | 807 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 808 | node = lttng_ht_iter_get_node_ulong(&iter); |
48842b30 DG |
809 | if (node == NULL) { |
810 | goto error; | |
811 | } | |
812 | ||
813 | return caa_container_of(node, struct ust_app_session, node); | |
814 | ||
815 | error: | |
816 | return NULL; | |
817 | } | |
818 | ||
421cb601 DG |
819 | /* |
820 | * Create a UST session onto the tracer of app and add it the session | |
821 | * hashtable. | |
822 | * | |
823 | * Return ust app session or NULL on error. | |
824 | */ | |
825 | static struct ust_app_session *create_ust_app_session( | |
826 | struct ltt_ust_session *usess, struct ust_app *app) | |
827 | { | |
828 | int ret; | |
829 | struct ust_app_session *ua_sess; | |
830 | ||
831 | ua_sess = lookup_session_by_app(usess, app); | |
832 | if (ua_sess == NULL) { | |
a991f516 MD |
833 | DBG2("UST app pid: %d session id %d not found, creating it", |
834 | app->key.pid, usess->id); | |
421cb601 DG |
835 | ua_sess = alloc_ust_app_session(); |
836 | if (ua_sess == NULL) { | |
837 | /* Only malloc can failed so something is really wrong */ | |
838 | goto error; | |
839 | } | |
477d7741 | 840 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
841 | } |
842 | ||
843 | if (ua_sess->handle == -1) { | |
844 | ret = ustctl_create_session(app->key.sock); | |
845 | if (ret < 0) { | |
846 | ERR("Error creating session for app pid %d, sock %d", | |
847 | app->key.pid, app->key.sock); | |
848 | /* TODO: free() ua_sess */ | |
849 | goto error; | |
850 | } | |
851 | ||
852 | DBG2("UST app ustctl create session handle %d", ret); | |
853 | ua_sess->handle = ret; | |
854 | ||
855 | /* Add ust app session to app's HT */ | |
2c348c10 | 856 | lttng_ht_node_init_ulong(&ua_sess->node, (unsigned long) ua_sess->id); |
bec39940 | 857 | lttng_ht_add_unique_ulong(app->sessions, &ua_sess->node); |
421cb601 DG |
858 | |
859 | DBG2("UST app session created successfully with handle %d", ret); | |
860 | } | |
861 | ||
862 | return ua_sess; | |
863 | ||
864 | error: | |
865 | return NULL; | |
866 | } | |
867 | ||
55cc08a6 DG |
868 | /* |
869 | * Create a context for the channel on the tracer. | |
870 | */ | |
871 | static | |
872 | int create_ust_app_channel_context(struct ust_app_session *ua_sess, | |
873 | struct ust_app_channel *ua_chan, struct lttng_ust_context *uctx, | |
874 | struct ust_app *app) | |
875 | { | |
876 | int ret = 0; | |
bec39940 DG |
877 | struct lttng_ht_iter iter; |
878 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
879 | struct ust_app_ctx *ua_ctx; |
880 | ||
881 | DBG2("UST app adding context to channel %s", ua_chan->name); | |
882 | ||
bec39940 DG |
883 | lttng_ht_lookup(ua_chan->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
884 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
885 | if (node != NULL) { |
886 | ret = -EEXIST; | |
887 | goto error; | |
888 | } | |
889 | ||
890 | ua_ctx = alloc_ust_app_ctx(uctx); | |
891 | if (ua_ctx == NULL) { | |
892 | /* malloc failed */ | |
893 | ret = -1; | |
894 | goto error; | |
895 | } | |
896 | ||
bec39940 DG |
897 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
898 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 DG |
899 | |
900 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
901 | if (ret < 0) { | |
902 | goto error; | |
903 | } | |
904 | ||
905 | error: | |
906 | return ret; | |
907 | } | |
908 | ||
909 | /* | |
910 | * Create an UST context and enable it for the event on the tracer. | |
911 | */ | |
912 | static | |
913 | int create_ust_app_event_context(struct ust_app_session *ua_sess, | |
914 | struct ust_app_event *ua_event, struct lttng_ust_context *uctx, | |
915 | struct ust_app *app) | |
916 | { | |
917 | int ret = 0; | |
bec39940 DG |
918 | struct lttng_ht_iter iter; |
919 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
920 | struct ust_app_ctx *ua_ctx; |
921 | ||
922 | DBG2("UST app adding context to event %s", ua_event->name); | |
923 | ||
bec39940 DG |
924 | lttng_ht_lookup(ua_event->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
925 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
926 | if (node != NULL) { |
927 | ret = -EEXIST; | |
928 | goto error; | |
929 | } | |
930 | ||
931 | ua_ctx = alloc_ust_app_ctx(uctx); | |
932 | if (ua_ctx == NULL) { | |
933 | /* malloc failed */ | |
934 | ret = -1; | |
935 | goto error; | |
936 | } | |
937 | ||
bec39940 DG |
938 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
939 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 DG |
940 | |
941 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
942 | if (ret < 0) { | |
943 | goto error; | |
944 | } | |
945 | ||
946 | error: | |
947 | return ret; | |
948 | } | |
949 | ||
edb67388 DG |
950 | /* |
951 | * Enable on the tracer side a ust app event for the session and channel. | |
952 | */ | |
953 | static | |
954 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 955 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
956 | { |
957 | int ret; | |
958 | ||
959 | ret = enable_ust_event(app, ua_sess, ua_event); | |
960 | if (ret < 0) { | |
961 | goto error; | |
962 | } | |
963 | ||
964 | ua_event->enabled = 1; | |
965 | ||
966 | error: | |
967 | return ret; | |
968 | } | |
969 | ||
9730260e DG |
970 | /* |
971 | * Disable on the tracer side a ust app event for the session and channel. | |
972 | */ | |
973 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
7f79d3a1 | 974 | struct ust_app_event *ua_event, struct ust_app *app) |
9730260e DG |
975 | { |
976 | int ret; | |
977 | ||
978 | ret = disable_ust_event(app, ua_sess, ua_event); | |
979 | if (ret < 0) { | |
980 | goto error; | |
981 | } | |
982 | ||
983 | ua_event->enabled = 0; | |
984 | ||
985 | error: | |
986 | return ret; | |
987 | } | |
988 | ||
78f0bacd DG |
989 | /* |
990 | * Lookup ust app channel for session and disable it on the tracer side. | |
991 | */ | |
8535a6d9 DG |
992 | static |
993 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
994 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 995 | { |
8535a6d9 | 996 | int ret; |
78f0bacd DG |
997 | |
998 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
999 | if (ret < 0) { | |
1000 | goto error; | |
1001 | } | |
1002 | ||
8535a6d9 DG |
1003 | ua_chan->enabled = 0; |
1004 | ||
78f0bacd DG |
1005 | error: |
1006 | return ret; | |
1007 | } | |
1008 | ||
1009 | /* | |
1010 | * Lookup ust app channel for session and enable it on the tracer side. | |
1011 | */ | |
1012 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
1013 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
1014 | { | |
1015 | int ret = 0; | |
bec39940 DG |
1016 | struct lttng_ht_iter iter; |
1017 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1018 | struct ust_app_channel *ua_chan; |
1019 | ||
bec39940 DG |
1020 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1021 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
78f0bacd | 1022 | if (ua_chan_node == NULL) { |
a991f516 MD |
1023 | DBG2("Unable to find channel %s in ust session id %u", |
1024 | uchan->name, ua_sess->id); | |
78f0bacd DG |
1025 | goto error; |
1026 | } | |
1027 | ||
1028 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1029 | ||
1030 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
1031 | if (ret < 0) { | |
1032 | goto error; | |
1033 | } | |
1034 | ||
1035 | error: | |
1036 | return ret; | |
1037 | } | |
1038 | ||
284d8f55 | 1039 | /* |
5b4a0ec0 | 1040 | * Create UST app channel and create it on the tracer. |
284d8f55 | 1041 | */ |
5b4a0ec0 DG |
1042 | static struct ust_app_channel *create_ust_app_channel( |
1043 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
1044 | struct ust_app *app) | |
1045 | { | |
1046 | int ret = 0; | |
bec39940 DG |
1047 | struct lttng_ht_iter iter; |
1048 | struct lttng_ht_node_str *ua_chan_node; | |
5b4a0ec0 DG |
1049 | struct ust_app_channel *ua_chan; |
1050 | ||
1051 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1052 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1053 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
5b4a0ec0 | 1054 | if (ua_chan_node == NULL) { |
a991f516 MD |
1055 | DBG2("Unable to find channel %s in ust session id %u", |
1056 | uchan->name, ua_sess->id); | |
5b4a0ec0 DG |
1057 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); |
1058 | if (ua_chan == NULL) { | |
1059 | goto error; | |
1060 | } | |
1061 | shadow_copy_channel(ua_chan, uchan); | |
1062 | ||
bec39940 | 1063 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
5b4a0ec0 DG |
1064 | } else { |
1065 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1066 | } | |
1067 | ||
1068 | ret = create_ust_channel(app, ua_sess, ua_chan); | |
1069 | if (ret < 0) { | |
1070 | goto error; | |
1071 | } | |
1072 | ||
1073 | return ua_chan; | |
1074 | ||
1075 | error: | |
1076 | return NULL; | |
1077 | } | |
1078 | ||
1079 | /* | |
1080 | * Create UST app event and create it on the tracer side. | |
1081 | */ | |
edb67388 DG |
1082 | static |
1083 | int create_ust_app_event(struct ust_app_session *ua_sess, | |
1084 | struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent, | |
1085 | struct ust_app *app) | |
284d8f55 | 1086 | { |
edb67388 | 1087 | int ret = 0; |
bec39940 DG |
1088 | struct lttng_ht_iter iter; |
1089 | struct lttng_ht_node_str *ua_event_node; | |
5b4a0ec0 | 1090 | struct ust_app_event *ua_event; |
284d8f55 | 1091 | |
5b4a0ec0 | 1092 | /* Get event node */ |
bec39940 DG |
1093 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
1094 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
edb67388 DG |
1095 | if (ua_event_node != NULL) { |
1096 | ERR("UST app event %s already exist. Stopping creation.", | |
1097 | uevent->attr.name); | |
1098 | goto end; | |
1099 | } | |
5b4a0ec0 | 1100 | |
edb67388 DG |
1101 | /* Does not exist so create one */ |
1102 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
1103 | if (ua_event == NULL) { | |
1104 | /* Only malloc can failed so something is really wrong */ | |
1105 | ret = -ENOMEM; | |
1106 | goto error; | |
5b4a0ec0 | 1107 | } |
edb67388 | 1108 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 1109 | |
edb67388 | 1110 | /* Create it on the tracer side */ |
5b4a0ec0 | 1111 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 1112 | if (ret < 0) { |
e5abf1bf | 1113 | rcu_read_lock(); |
edb67388 | 1114 | delete_ust_app_event(app->key.sock, ua_event); |
e5abf1bf | 1115 | rcu_read_unlock(); |
284d8f55 DG |
1116 | goto error; |
1117 | } | |
1118 | ||
8535a6d9 DG |
1119 | ua_event->enabled = 1; |
1120 | ||
bec39940 | 1121 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
284d8f55 | 1122 | |
7f79d3a1 DG |
1123 | DBG2("UST app create event %s for PID %d completed", |
1124 | ua_event->name, app->key.pid); | |
1125 | ||
edb67388 | 1126 | end: |
5b4a0ec0 | 1127 | error: |
edb67388 | 1128 | return ret; |
5b4a0ec0 DG |
1129 | } |
1130 | ||
1131 | /* | |
1132 | * Create UST metadata and open it on the tracer side. | |
1133 | */ | |
1134 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
1135 | char *pathname, struct ust_app *app) | |
1136 | { | |
1137 | int ret = 0; | |
1138 | ||
1139 | if (ua_sess->metadata == NULL) { | |
1140 | /* Allocate UST metadata */ | |
1141 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
1142 | if (ua_sess->metadata == NULL) { | |
1143 | ERR("UST app session %d creating metadata failed", | |
1144 | ua_sess->handle); | |
1145 | goto error; | |
1146 | } | |
1147 | ||
1148 | ret = open_ust_metadata(app, ua_sess); | |
1149 | if (ret < 0) { | |
1150 | goto error; | |
1151 | } | |
1152 | ||
1153 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
1154 | } | |
1155 | ||
1156 | /* Open UST metadata stream */ | |
1157 | if (ua_sess->metadata->stream_obj == NULL) { | |
1158 | ret = create_ust_stream(app, ua_sess); | |
1159 | if (ret < 0) { | |
1160 | goto error; | |
1161 | } | |
1162 | ||
67f747d8 MD |
1163 | ret = mkdir_run_as(ua_sess->path, S_IRWXU | S_IRWXG, |
1164 | ua_sess->uid, ua_sess->gid); | |
5b4a0ec0 DG |
1165 | if (ret < 0) { |
1166 | PERROR("mkdir UST metadata"); | |
1167 | goto error; | |
1168 | } | |
1169 | ||
477d7741 MD |
1170 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
1171 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
1172 | if (ret < 0) { |
1173 | PERROR("asprintf UST create stream"); | |
1174 | goto error; | |
1175 | } | |
1176 | ||
1177 | DBG2("UST metadata stream object created for app pid %d", | |
1178 | app->key.pid); | |
1179 | } else { | |
1180 | ERR("Attempting to create stream without metadata opened"); | |
1181 | goto error; | |
1182 | } | |
1183 | ||
1184 | return 0; | |
1185 | ||
1186 | error: | |
1187 | return -1; | |
1188 | } | |
1189 | ||
1190 | /* | |
1191 | * Return pointer to traceable apps list. | |
1192 | */ | |
bec39940 | 1193 | struct lttng_ht *ust_app_get_ht(void) |
5b4a0ec0 DG |
1194 | { |
1195 | return ust_app_ht; | |
1196 | } | |
1197 | ||
1198 | /* | |
1199 | * Return ust app pointer or NULL if not found. | |
1200 | */ | |
1201 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
1202 | { | |
bec39940 DG |
1203 | struct lttng_ht_node_ulong *node; |
1204 | struct lttng_ht_iter iter; | |
5b4a0ec0 DG |
1205 | |
1206 | rcu_read_lock(); | |
bec39940 DG |
1207 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) pid), &iter); |
1208 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1209 | if (node == NULL) { |
1210 | DBG2("UST app no found with pid %d", pid); | |
1211 | goto error; | |
1212 | } | |
1213 | rcu_read_unlock(); | |
1214 | ||
1215 | DBG2("Found UST app by pid %d", pid); | |
1216 | ||
1217 | return caa_container_of(node, struct ust_app, node); | |
1218 | ||
1219 | error: | |
1220 | rcu_read_unlock(); | |
1221 | return NULL; | |
1222 | } | |
1223 | ||
1224 | /* | |
1225 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
1226 | * add it to the global traceable app list. | |
1227 | * | |
0df502fd MD |
1228 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
1229 | * bitness is not supported. | |
5b4a0ec0 DG |
1230 | */ |
1231 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
1232 | { | |
1233 | struct ust_app *lta; | |
1234 | ||
7753dea8 MD |
1235 | if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL) |
1236 | || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) { | |
f943b0fb | 1237 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1238 | "%d-bit long, but no consumerd for this long size is available.\n", |
1239 | msg->name, msg->pid, msg->bits_per_long); | |
88ff5b7f | 1240 | close(sock); |
0df502fd MD |
1241 | return -EINVAL; |
1242 | } | |
5b4a0ec0 DG |
1243 | lta = zmalloc(sizeof(struct ust_app)); |
1244 | if (lta == NULL) { | |
1245 | PERROR("malloc"); | |
1246 | return -ENOMEM; | |
1247 | } | |
1248 | ||
1249 | lta->ppid = msg->ppid; | |
1250 | lta->uid = msg->uid; | |
1251 | lta->gid = msg->gid; | |
7753dea8 | 1252 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1253 | lta->v_major = msg->major; |
1254 | lta->v_minor = msg->minor; | |
1255 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1256 | lta->name[16] = '\0'; | |
bec39940 | 1257 | lta->sessions = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
5b4a0ec0 DG |
1258 | |
1259 | /* Set key map */ | |
1260 | lta->key.pid = msg->pid; | |
bec39940 | 1261 | lttng_ht_node_init_ulong(<a->node, (unsigned long)lta->key.pid); |
5b4a0ec0 | 1262 | lta->key.sock = sock; |
bec39940 | 1263 | lttng_ht_node_init_ulong(<a->key.node, (unsigned long)lta->key.sock); |
5b4a0ec0 DG |
1264 | |
1265 | rcu_read_lock(); | |
bec39940 DG |
1266 | lttng_ht_add_unique_ulong(ust_app_sock_key_map, <a->key.node); |
1267 | lttng_ht_add_unique_ulong(ust_app_ht, <a->node); | |
5b4a0ec0 DG |
1268 | rcu_read_unlock(); |
1269 | ||
1270 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
1271 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, | |
1272 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
1273 | ||
1274 | return 0; | |
1275 | } | |
1276 | ||
1277 | /* | |
1278 | * Unregister app by removing it from the global traceable app list and freeing | |
1279 | * the data struct. | |
1280 | * | |
1281 | * The socket is already closed at this point so no close to sock. | |
1282 | */ | |
1283 | void ust_app_unregister(int sock) | |
1284 | { | |
1285 | struct ust_app *lta; | |
bec39940 DG |
1286 | struct lttng_ht_node_ulong *node; |
1287 | struct lttng_ht_iter iter; | |
525b0740 | 1288 | int ret; |
5b4a0ec0 DG |
1289 | |
1290 | rcu_read_lock(); | |
1291 | lta = find_app_by_sock(sock); | |
1292 | if (lta == NULL) { | |
1293 | ERR("Unregister app sock %d not found!", sock); | |
1294 | goto error; | |
1295 | } | |
1296 | ||
1297 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
1298 | ||
886459c6 MD |
1299 | /* Remove application from socket hash table */ |
1300 | lttng_ht_lookup(ust_app_sock_key_map, (void *)((unsigned long) sock), &iter); | |
1301 | ret = lttng_ht_del(ust_app_sock_key_map, &iter); | |
1302 | assert(!ret); | |
1303 | ||
5b4a0ec0 | 1304 | /* Get the node reference for a call_rcu */ |
bec39940 DG |
1305 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) lta->key.pid), &iter); |
1306 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1307 | if (node == NULL) { |
1308 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
1309 | goto error; | |
1310 | } | |
284d8f55 | 1311 | |
886459c6 | 1312 | /* Remove application from PID hash table */ |
bec39940 | 1313 | ret = lttng_ht_del(ust_app_ht, &iter); |
525b0740 | 1314 | assert(!ret); |
5b4a0ec0 | 1315 | call_rcu(&node->head, delete_ust_app_rcu); |
284d8f55 | 1316 | error: |
5b4a0ec0 DG |
1317 | rcu_read_unlock(); |
1318 | return; | |
284d8f55 DG |
1319 | } |
1320 | ||
1321 | /* | |
5b4a0ec0 | 1322 | * Return traceable_app_count |
284d8f55 | 1323 | */ |
5b4a0ec0 | 1324 | unsigned long ust_app_list_count(void) |
284d8f55 | 1325 | { |
5b4a0ec0 | 1326 | unsigned long count; |
284d8f55 | 1327 | |
5b4a0ec0 | 1328 | rcu_read_lock(); |
bec39940 | 1329 | count = lttng_ht_get_count(ust_app_ht); |
5b4a0ec0 | 1330 | rcu_read_unlock(); |
284d8f55 | 1331 | |
5b4a0ec0 | 1332 | return count; |
284d8f55 DG |
1333 | } |
1334 | ||
5b4a0ec0 DG |
1335 | /* |
1336 | * Fill events array with all events name of all registered apps. | |
1337 | */ | |
1338 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1339 | { |
5b4a0ec0 DG |
1340 | int ret, handle; |
1341 | size_t nbmem, count = 0; | |
bec39940 | 1342 | struct lttng_ht_iter iter; |
5b4a0ec0 DG |
1343 | struct ust_app *app; |
1344 | struct lttng_event *tmp; | |
421cb601 | 1345 | |
5b4a0ec0 DG |
1346 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1347 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1348 | if (tmp == NULL) { | |
1349 | PERROR("zmalloc ust app events"); | |
1350 | ret = -ENOMEM; | |
421cb601 DG |
1351 | goto error; |
1352 | } | |
1353 | ||
5b4a0ec0 | 1354 | rcu_read_lock(); |
421cb601 | 1355 | |
bec39940 | 1356 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
90eaa0d2 | 1357 | struct lttng_ust_tracepoint_iter uiter; |
ac3bd9c0 | 1358 | |
5b4a0ec0 DG |
1359 | handle = ustctl_tracepoint_list(app->key.sock); |
1360 | if (handle < 0) { | |
1361 | ERR("UST app list events getting handle failed for app pid %d", | |
1362 | app->key.pid); | |
1363 | continue; | |
1364 | } | |
421cb601 | 1365 | |
5b4a0ec0 | 1366 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, |
90eaa0d2 | 1367 | &uiter)) != -ENOENT) { |
815564d8 MD |
1368 | if (count >= nbmem) { |
1369 | DBG2("Reallocating event list from %zu to %zu entries", nbmem, | |
1370 | 2 * nbmem); | |
1371 | nbmem *= 2; | |
2f221590 | 1372 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event)); |
5b4a0ec0 DG |
1373 | if (tmp == NULL) { |
1374 | PERROR("realloc ust app events"); | |
1375 | ret = -ENOMEM; | |
1376 | goto rcu_error; | |
1377 | } | |
1378 | } | |
90eaa0d2 DG |
1379 | memcpy(tmp[count].name, uiter.name, LTTNG_UST_SYM_NAME_LEN); |
1380 | memcpy(tmp[count].loglevel, uiter.loglevel, LTTNG_UST_SYM_NAME_LEN); | |
1381 | tmp[count].loglevel_value = uiter.loglevel_value; | |
5b4a0ec0 DG |
1382 | tmp[count].type = LTTNG_UST_TRACEPOINT; |
1383 | tmp[count].pid = app->key.pid; | |
1384 | tmp[count].enabled = -1; | |
1385 | count++; | |
421cb601 | 1386 | } |
421cb601 DG |
1387 | } |
1388 | ||
5b4a0ec0 DG |
1389 | ret = count; |
1390 | *events = tmp; | |
421cb601 | 1391 | |
5b4a0ec0 | 1392 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1393 | |
5b4a0ec0 DG |
1394 | rcu_error: |
1395 | rcu_read_unlock(); | |
421cb601 | 1396 | error: |
5b4a0ec0 | 1397 | return ret; |
421cb601 DG |
1398 | } |
1399 | ||
5b4a0ec0 DG |
1400 | /* |
1401 | * Free and clean all traceable apps of the global list. | |
1402 | */ | |
1403 | void ust_app_clean_list(void) | |
421cb601 | 1404 | { |
5b4a0ec0 | 1405 | int ret; |
bec39940 DG |
1406 | struct lttng_ht_iter iter; |
1407 | struct lttng_ht_node_ulong *node; | |
421cb601 | 1408 | |
5b4a0ec0 | 1409 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1410 | |
5b4a0ec0 | 1411 | rcu_read_lock(); |
421cb601 | 1412 | |
bec39940 DG |
1413 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, node, node) { |
1414 | ret = lttng_ht_del(ust_app_ht, &iter); | |
525b0740 | 1415 | assert(!ret); |
bec39940 | 1416 | call_rcu(&node->head, delete_ust_app_rcu); |
421cb601 | 1417 | } |
bec39940 DG |
1418 | /* Destroy is done only when the ht is empty */ |
1419 | lttng_ht_destroy(ust_app_ht); | |
421cb601 | 1420 | |
bec39940 DG |
1421 | cds_lfht_for_each_entry(ust_app_sock_key_map->ht, &iter.iter, node, node) { |
1422 | ret = lttng_ht_del(ust_app_sock_key_map, &iter); | |
1423 | assert(!ret); | |
1424 | } | |
1425 | /* Destroy is done only when the ht is empty */ | |
1426 | lttng_ht_destroy(ust_app_sock_key_map); | |
421cb601 | 1427 | |
5b4a0ec0 DG |
1428 | rcu_read_unlock(); |
1429 | } | |
1430 | ||
1431 | /* | |
1432 | * Init UST app hash table. | |
1433 | */ | |
1434 | void ust_app_ht_alloc(void) | |
1435 | { | |
bec39940 DG |
1436 | ust_app_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1437 | ust_app_sock_key_map = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
421cb601 DG |
1438 | } |
1439 | ||
78f0bacd DG |
1440 | /* |
1441 | * For a specific UST session, disable the channel for all registered apps. | |
1442 | */ | |
35a9059d | 1443 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1444 | struct ltt_ust_channel *uchan) |
1445 | { | |
1446 | int ret = 0; | |
bec39940 DG |
1447 | struct lttng_ht_iter iter; |
1448 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1449 | struct ust_app *app; |
1450 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1451 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1452 | |
1453 | if (usess == NULL || uchan == NULL) { | |
1454 | ERR("Disabling UST global channel with NULL values"); | |
1455 | ret = -1; | |
1456 | goto error; | |
1457 | } | |
1458 | ||
a991f516 MD |
1459 | DBG2("UST app disabling channel %s from global domain for session id %d", |
1460 | uchan->name, usess->id); | |
78f0bacd DG |
1461 | |
1462 | rcu_read_lock(); | |
1463 | ||
1464 | /* For every registered applications */ | |
bec39940 DG |
1465 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
1466 | struct lttng_ht_iter uiter; | |
78f0bacd DG |
1467 | ua_sess = lookup_session_by_app(usess, app); |
1468 | if (ua_sess == NULL) { | |
1469 | continue; | |
1470 | } | |
1471 | ||
8535a6d9 | 1472 | /* Get channel */ |
bec39940 DG |
1473 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1474 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
8535a6d9 DG |
1475 | /* If the session if found for the app, the channel must be there */ |
1476 | assert(ua_chan_node); | |
1477 | ||
1478 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1479 | /* The channel must not be already disabled */ | |
1480 | assert(ua_chan->enabled == 1); | |
1481 | ||
1482 | /* Disable channel onto application */ | |
1483 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1484 | if (ret < 0) { |
1485 | /* XXX: We might want to report this error at some point... */ | |
1486 | continue; | |
1487 | } | |
1488 | } | |
1489 | ||
1490 | rcu_read_unlock(); | |
1491 | ||
1492 | error: | |
1493 | return ret; | |
1494 | } | |
1495 | ||
1496 | /* | |
1497 | * For a specific UST session, enable the channel for all registered apps. | |
1498 | */ | |
35a9059d | 1499 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1500 | struct ltt_ust_channel *uchan) |
1501 | { | |
1502 | int ret = 0; | |
bec39940 | 1503 | struct lttng_ht_iter iter; |
78f0bacd DG |
1504 | struct ust_app *app; |
1505 | struct ust_app_session *ua_sess; | |
1506 | ||
1507 | if (usess == NULL || uchan == NULL) { | |
1508 | ERR("Adding UST global channel to NULL values"); | |
1509 | ret = -1; | |
1510 | goto error; | |
1511 | } | |
1512 | ||
a991f516 MD |
1513 | DBG2("UST app enabling channel %s to global domain for session id %d", |
1514 | uchan->name, usess->id); | |
78f0bacd DG |
1515 | |
1516 | rcu_read_lock(); | |
1517 | ||
1518 | /* For every registered applications */ | |
bec39940 | 1519 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
78f0bacd DG |
1520 | ua_sess = lookup_session_by_app(usess, app); |
1521 | if (ua_sess == NULL) { | |
1522 | continue; | |
1523 | } | |
1524 | ||
1525 | /* Enable channel onto application */ | |
1526 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1527 | if (ret < 0) { | |
1528 | /* XXX: We might want to report this error at some point... */ | |
1529 | continue; | |
1530 | } | |
1531 | } | |
1532 | ||
1533 | rcu_read_unlock(); | |
1534 | ||
1535 | error: | |
1536 | return ret; | |
1537 | } | |
1538 | ||
b0a40d28 DG |
1539 | /* |
1540 | * Disable an event in a channel and for a specific session. | |
1541 | */ | |
35a9059d DG |
1542 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
1543 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
1544 | { |
1545 | int ret = 0; | |
bec39940 DG |
1546 | struct lttng_ht_iter iter, uiter; |
1547 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
b0a40d28 DG |
1548 | struct ust_app *app; |
1549 | struct ust_app_session *ua_sess; | |
1550 | struct ust_app_channel *ua_chan; | |
1551 | struct ust_app_event *ua_event; | |
1552 | ||
1553 | DBG("UST app disabling event %s for all apps in channel " | |
a991f516 | 1554 | "%s for session id %d", uevent->attr.name, uchan->name, usess->id); |
b0a40d28 DG |
1555 | |
1556 | rcu_read_lock(); | |
1557 | ||
1558 | /* For all registered applications */ | |
bec39940 | 1559 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
b0a40d28 DG |
1560 | ua_sess = lookup_session_by_app(usess, app); |
1561 | if (ua_sess == NULL) { | |
1562 | /* Next app */ | |
1563 | continue; | |
1564 | } | |
1565 | ||
1566 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1567 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1568 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 | 1569 | if (ua_chan_node == NULL) { |
a991f516 MD |
1570 | DBG2("Channel %s not found in session id %d for app pid %d." |
1571 | "Skipping", uchan->name, usess->id, app->key.pid); | |
b0a40d28 DG |
1572 | continue; |
1573 | } | |
1574 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1575 | ||
bec39940 DG |
1576 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
1577 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 DG |
1578 | if (ua_event_node == NULL) { |
1579 | DBG2("Event %s not found in channel %s for app pid %d." | |
35a9059d | 1580 | "Skipping", uevent->attr.name, uchan->name, app->key.pid); |
b0a40d28 DG |
1581 | continue; |
1582 | } | |
1583 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1584 | ||
7f79d3a1 | 1585 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
b0a40d28 DG |
1586 | if (ret < 0) { |
1587 | /* XXX: Report error someday... */ | |
1588 | continue; | |
1589 | } | |
1590 | } | |
1591 | ||
1592 | rcu_read_unlock(); | |
1593 | ||
1594 | return ret; | |
1595 | } | |
1596 | ||
9730260e | 1597 | /* |
edb67388 | 1598 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
1599 | * registered apps. |
1600 | */ | |
35a9059d | 1601 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
1602 | struct ltt_ust_channel *uchan) |
1603 | { | |
1604 | int ret = 0; | |
bec39940 DG |
1605 | struct lttng_ht_iter iter, uiter; |
1606 | struct lttng_ht_node_str *ua_chan_node; | |
9730260e DG |
1607 | struct ust_app *app; |
1608 | struct ust_app_session *ua_sess; | |
1609 | struct ust_app_channel *ua_chan; | |
1610 | struct ust_app_event *ua_event; | |
1611 | ||
1612 | DBG("UST app disabling all event for all apps in channel " | |
a991f516 | 1613 | "%s for session id %d", uchan->name, usess->id); |
9730260e DG |
1614 | |
1615 | rcu_read_lock(); | |
1616 | ||
1617 | /* For all registered applications */ | |
bec39940 | 1618 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
9730260e | 1619 | ua_sess = lookup_session_by_app(usess, app); |
edb67388 DG |
1620 | /* If ua_sess is NULL, there is a code flow error */ |
1621 | assert(ua_sess); | |
9730260e DG |
1622 | |
1623 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1624 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1625 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1626 | /* If the channel is not found, there is a code flow error */ |
1627 | assert(ua_chan_node); | |
1628 | ||
9730260e DG |
1629 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1630 | ||
1631 | /* Disable each events of channel */ | |
bec39940 DG |
1632 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
1633 | node.node) { | |
7f79d3a1 | 1634 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
9730260e DG |
1635 | if (ret < 0) { |
1636 | /* XXX: Report error someday... */ | |
1637 | continue; | |
1638 | } | |
1639 | } | |
1640 | } | |
1641 | ||
1642 | rcu_read_unlock(); | |
1643 | ||
1644 | return ret; | |
1645 | } | |
1646 | ||
421cb601 | 1647 | /* |
5b4a0ec0 | 1648 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1649 | */ |
35a9059d | 1650 | int ust_app_create_channel_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1651 | struct ltt_ust_channel *uchan) |
1652 | { | |
1653 | int ret = 0; | |
bec39940 | 1654 | struct lttng_ht_iter iter; |
48842b30 DG |
1655 | struct ust_app *app; |
1656 | struct ust_app_session *ua_sess; | |
1657 | struct ust_app_channel *ua_chan; | |
1658 | ||
421cb601 DG |
1659 | if (usess == NULL || uchan == NULL) { |
1660 | ERR("Adding UST global channel to NULL values"); | |
1661 | ret = -1; | |
1662 | goto error; | |
1663 | } | |
1664 | ||
a991f516 MD |
1665 | DBG2("UST app adding channel %s to global domain for session id %d", |
1666 | uchan->name, usess->id); | |
48842b30 DG |
1667 | |
1668 | rcu_read_lock(); | |
421cb601 | 1669 | |
5b4a0ec0 | 1670 | /* For every registered applications */ |
bec39940 | 1671 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
edb67388 DG |
1672 | /* |
1673 | * Create session on the tracer side and add it to app session HT. Note | |
1674 | * that if session exist, it will simply return a pointer to the ust | |
1675 | * app session. | |
1676 | */ | |
421cb601 | 1677 | ua_sess = create_ust_app_session(usess, app); |
509cbaf8 | 1678 | if (ua_sess == NULL) { |
5b4a0ec0 | 1679 | continue; |
48842b30 DG |
1680 | } |
1681 | ||
421cb601 DG |
1682 | /* Create channel onto application */ |
1683 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1684 | if (ua_chan == NULL) { | |
5b4a0ec0 | 1685 | continue; |
48842b30 | 1686 | } |
48842b30 | 1687 | } |
5b4a0ec0 | 1688 | |
48842b30 DG |
1689 | rcu_read_unlock(); |
1690 | ||
421cb601 | 1691 | error: |
48842b30 DG |
1692 | return ret; |
1693 | } | |
1694 | ||
5b4a0ec0 | 1695 | /* |
edb67388 | 1696 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 1697 | */ |
35a9059d | 1698 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1699 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1700 | { | |
1701 | int ret = 0; | |
bec39940 DG |
1702 | struct lttng_ht_iter iter, uiter; |
1703 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
48842b30 DG |
1704 | struct ust_app *app; |
1705 | struct ust_app_session *ua_sess; | |
1706 | struct ust_app_channel *ua_chan; | |
1707 | struct ust_app_event *ua_event; | |
48842b30 | 1708 | |
a991f516 MD |
1709 | DBG("UST app enabling event %s for all apps for session id %d", |
1710 | uevent->attr.name, usess->id); | |
48842b30 | 1711 | |
edb67388 DG |
1712 | /* |
1713 | * NOTE: At this point, this function is called only if the session and | |
1714 | * channel passed are already created for all apps. and enabled on the | |
1715 | * tracer also. | |
1716 | */ | |
1717 | ||
48842b30 | 1718 | rcu_read_lock(); |
421cb601 DG |
1719 | |
1720 | /* For all registered applications */ | |
bec39940 | 1721 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
edb67388 DG |
1722 | ua_sess = lookup_session_by_app(usess, app); |
1723 | /* If ua_sess is NULL, there is a code flow error */ | |
1724 | assert(ua_sess); | |
ba767faf | 1725 | |
edb67388 | 1726 | /* Lookup channel in the ust app session */ |
bec39940 DG |
1727 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1728 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1729 | /* If the channel is not found, there is a code flow error */ |
1730 | assert(ua_chan_node); | |
1731 | ||
1732 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1733 | ||
bec39940 DG |
1734 | lttng_ht_lookup(ua_chan->events, (void*)uevent->attr.name, &uiter); |
1735 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
35a9059d | 1736 | if (ua_event_node == NULL) { |
7f79d3a1 DG |
1737 | DBG3("UST app enable event %s not found for app PID %d." |
1738 | "Skipping app", uevent->attr.name, app->key.pid); | |
35a9059d DG |
1739 | continue; |
1740 | } | |
1741 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1742 | ||
1743 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
1744 | if (ret < 0) { | |
7f79d3a1 | 1745 | goto error; |
48842b30 | 1746 | } |
edb67388 DG |
1747 | } |
1748 | ||
7f79d3a1 | 1749 | error: |
edb67388 | 1750 | rcu_read_unlock(); |
edb67388 DG |
1751 | return ret; |
1752 | } | |
1753 | ||
1754 | /* | |
1755 | * For a specific existing UST session and UST channel, creates the event for | |
1756 | * all registered apps. | |
1757 | */ | |
35a9059d | 1758 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
1759 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1760 | { | |
1761 | int ret = 0; | |
bec39940 DG |
1762 | struct lttng_ht_iter iter, uiter; |
1763 | struct lttng_ht_node_str *ua_chan_node; | |
edb67388 DG |
1764 | struct ust_app *app; |
1765 | struct ust_app_session *ua_sess; | |
1766 | struct ust_app_channel *ua_chan; | |
1767 | ||
a991f516 MD |
1768 | DBG("UST app creating event %s for all apps for session id %d", |
1769 | uevent->attr.name, usess->id); | |
edb67388 DG |
1770 | |
1771 | /* | |
1772 | * NOTE: At this point, this function is called only if the session and | |
1773 | * channel passed are already created for all apps. and enabled on the | |
1774 | * tracer also. | |
1775 | */ | |
1776 | ||
1777 | rcu_read_lock(); | |
1778 | ||
1779 | /* For all registered applications */ | |
bec39940 | 1780 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
edb67388 DG |
1781 | ua_sess = lookup_session_by_app(usess, app); |
1782 | /* If ua_sess is NULL, there is a code flow error */ | |
1783 | assert(ua_sess); | |
48842b30 DG |
1784 | |
1785 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1786 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1787 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1788 | /* If the channel is not found, there is a code flow error */ |
1789 | assert(ua_chan_node); | |
1790 | ||
48842b30 DG |
1791 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1792 | ||
edb67388 DG |
1793 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1794 | if (ret < 0) { | |
5b4a0ec0 | 1795 | continue; |
48842b30 | 1796 | } |
48842b30 | 1797 | } |
5b4a0ec0 | 1798 | |
48842b30 DG |
1799 | rcu_read_unlock(); |
1800 | ||
1801 | return ret; | |
1802 | } | |
1803 | ||
5b4a0ec0 DG |
1804 | /* |
1805 | * Start tracing for a specific UST session and app. | |
1806 | */ | |
421cb601 | 1807 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1808 | { |
1809 | int ret = 0; | |
bec39940 | 1810 | struct lttng_ht_iter iter; |
48842b30 DG |
1811 | struct ust_app_session *ua_sess; |
1812 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 1813 | struct ltt_ust_stream *ustream; |
7753dea8 | 1814 | int consumerd_fd; |
48842b30 | 1815 | |
421cb601 | 1816 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 1817 | |
509cbaf8 MD |
1818 | rcu_read_lock(); |
1819 | ||
421cb601 DG |
1820 | ua_sess = lookup_session_by_app(usess, app); |
1821 | if (ua_sess == NULL) { | |
509cbaf8 | 1822 | goto error_rcu_unlock; |
421cb601 | 1823 | } |
48842b30 | 1824 | |
aea829b3 DG |
1825 | /* Upon restart, we skip the setup, already done */ |
1826 | if (ua_sess->started) { | |
8be98f9a | 1827 | goto skip_setup; |
aea829b3 | 1828 | } |
8be98f9a | 1829 | |
421cb601 DG |
1830 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1831 | if (ret < 0) { | |
509cbaf8 | 1832 | goto error_rcu_unlock; |
421cb601 | 1833 | } |
48842b30 | 1834 | |
421cb601 | 1835 | /* For each channel */ |
bec39940 DG |
1836 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
1837 | node.node) { | |
421cb601 DG |
1838 | /* Create all streams */ |
1839 | while (1) { | |
5b4a0ec0 | 1840 | /* Create UST stream */ |
421cb601 DG |
1841 | ustream = zmalloc(sizeof(*ustream)); |
1842 | if (ustream == NULL) { | |
1843 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1844 | goto error_rcu_unlock; |
421cb601 | 1845 | } |
48842b30 | 1846 | |
421cb601 DG |
1847 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
1848 | &ustream->obj); | |
48842b30 | 1849 | if (ret < 0) { |
421cb601 DG |
1850 | /* Got all streams */ |
1851 | break; | |
48842b30 | 1852 | } |
421cb601 | 1853 | ustream->handle = ustream->obj->handle; |
48842b30 | 1854 | |
421cb601 DG |
1855 | /* Order is important */ |
1856 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
477d7741 MD |
1857 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", |
1858 | ua_sess->path, ua_chan->name, | |
1859 | ua_chan->streams.count++); | |
aba8e916 DG |
1860 | if (ret < 0) { |
1861 | PERROR("asprintf UST create stream"); | |
421cb601 | 1862 | continue; |
aba8e916 | 1863 | } |
421cb601 DG |
1864 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1865 | ustream->pathname); | |
1866 | } | |
421cb601 | 1867 | } |
aba8e916 | 1868 | |
7753dea8 MD |
1869 | switch (app->bits_per_long) { |
1870 | case 64: | |
1871 | consumerd_fd = ust_consumerd64_fd; | |
1872 | break; | |
1873 | case 32: | |
1874 | consumerd_fd = ust_consumerd32_fd; | |
1875 | break; | |
1876 | default: | |
1877 | ret = -EINVAL; | |
1878 | goto error_rcu_unlock; | |
1879 | } | |
aea829b3 | 1880 | |
421cb601 | 1881 | /* Setup UST consumer socket and send fds to it */ |
7753dea8 | 1882 | ret = ust_consumer_send_session(consumerd_fd, ua_sess); |
421cb601 | 1883 | if (ret < 0) { |
509cbaf8 | 1884 | goto error_rcu_unlock; |
421cb601 | 1885 | } |
8be98f9a | 1886 | ua_sess->started = 1; |
48842b30 | 1887 | |
8be98f9a | 1888 | skip_setup: |
421cb601 DG |
1889 | /* This start the UST tracing */ |
1890 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
1891 | if (ret < 0) { | |
1892 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 1893 | goto error_rcu_unlock; |
421cb601 | 1894 | } |
5b4a0ec0 | 1895 | |
509cbaf8 | 1896 | rcu_read_unlock(); |
48842b30 | 1897 | |
421cb601 DG |
1898 | /* Quiescent wait after starting trace */ |
1899 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 1900 | |
421cb601 | 1901 | return 0; |
48842b30 | 1902 | |
509cbaf8 MD |
1903 | error_rcu_unlock: |
1904 | rcu_read_unlock(); | |
421cb601 DG |
1905 | return -1; |
1906 | } | |
48842b30 | 1907 | |
8be98f9a MD |
1908 | /* |
1909 | * Stop tracing for a specific UST session and app. | |
1910 | */ | |
1911 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1912 | { | |
1913 | int ret = 0; | |
bec39940 | 1914 | struct lttng_ht_iter iter; |
8be98f9a | 1915 | struct ust_app_session *ua_sess; |
6d3686da | 1916 | struct ust_app_channel *ua_chan; |
8be98f9a MD |
1917 | |
1918 | DBG("Stopping tracing for ust app pid %d", app->key.pid); | |
1919 | ||
1920 | rcu_read_lock(); | |
1921 | ||
1922 | ua_sess = lookup_session_by_app(usess, app); | |
1923 | if (ua_sess == NULL) { | |
1924 | /* Only malloc can failed so something is really wrong */ | |
1925 | goto error_rcu_unlock; | |
1926 | } | |
1927 | ||
9d6c7d3f DG |
1928 | /* This inhibits UST tracing */ |
1929 | ret = ustctl_stop_session(app->key.sock, ua_sess->handle); | |
1930 | if (ret < 0) { | |
1931 | ERR("Error stopping tracing for app pid: %d", app->key.pid); | |
1932 | goto error_rcu_unlock; | |
1933 | } | |
1934 | ||
1935 | /* Quiescent wait after stopping trace */ | |
1936 | ustctl_wait_quiescent(app->key.sock); | |
1937 | ||
1938 | /* Flushing buffers */ | |
bec39940 DG |
1939 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
1940 | node.node) { | |
6d3686da | 1941 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_chan->obj); |
8be98f9a | 1942 | if (ret < 0) { |
6d3686da DG |
1943 | ERR("UST app PID %d channel %s flush failed", |
1944 | app->key.pid, ua_chan->name); | |
1945 | ERR("Ended with ret %d", ret); | |
1946 | /* Continuing flushing all buffers */ | |
1947 | continue; | |
8be98f9a MD |
1948 | } |
1949 | } | |
8be98f9a | 1950 | |
90d97d10 DG |
1951 | /* Flush all buffers before stopping */ |
1952 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_sess->metadata->obj); | |
1953 | if (ret < 0) { | |
1954 | ERR("UST app PID %d metadata flush failed", app->key.pid); | |
1955 | ERR("Ended with ret %d", ret); | |
1956 | } | |
1957 | ||
9d6c7d3f DG |
1958 | rcu_read_unlock(); |
1959 | ||
8be98f9a MD |
1960 | return 0; |
1961 | ||
1962 | error_rcu_unlock: | |
1963 | rcu_read_unlock(); | |
1964 | return -1; | |
1965 | } | |
1966 | ||
84cd17c6 MD |
1967 | /* |
1968 | * Destroy a specific UST session in apps. | |
1969 | */ | |
1970 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1971 | { | |
1972 | struct ust_app_session *ua_sess; | |
1973 | struct lttng_ust_object_data obj; | |
bec39940 DG |
1974 | struct lttng_ht_iter iter; |
1975 | struct lttng_ht_node_ulong *node; | |
525b0740 | 1976 | int ret; |
84cd17c6 MD |
1977 | |
1978 | DBG("Destroy tracing for ust app pid %d", app->key.pid); | |
1979 | ||
1980 | rcu_read_lock(); | |
1981 | ||
1982 | __lookup_session_by_app(usess, app, &iter); | |
bec39940 | 1983 | node = lttng_ht_iter_get_node_ulong(&iter); |
84cd17c6 MD |
1984 | if (node == NULL) { |
1985 | /* Only malloc can failed so something is really wrong */ | |
1986 | goto error_rcu_unlock; | |
1987 | } | |
1988 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
bec39940 | 1989 | ret = lttng_ht_del(app->sessions, &iter); |
525b0740 | 1990 | assert(!ret); |
84cd17c6 MD |
1991 | delete_ust_app_session(app->key.sock, ua_sess); |
1992 | obj.handle = ua_sess->handle; | |
1993 | obj.shm_fd = -1; | |
1994 | obj.wait_fd = -1; | |
1995 | obj.memory_map_size = 0; | |
1996 | ustctl_release_object(app->key.sock, &obj); | |
1997 | ||
1998 | rcu_read_unlock(); | |
1999 | ||
2000 | /* Quiescent wait after stopping trace */ | |
2001 | ustctl_wait_quiescent(app->key.sock); | |
2002 | ||
2003 | return 0; | |
2004 | ||
2005 | error_rcu_unlock: | |
2006 | rcu_read_unlock(); | |
2007 | return -1; | |
2008 | } | |
2009 | ||
5b4a0ec0 DG |
2010 | /* |
2011 | * Start tracing for the UST session. | |
2012 | */ | |
421cb601 DG |
2013 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
2014 | { | |
2015 | int ret = 0; | |
bec39940 | 2016 | struct lttng_ht_iter iter; |
421cb601 | 2017 | struct ust_app *app; |
48842b30 | 2018 | |
421cb601 DG |
2019 | DBG("Starting all UST traces"); |
2020 | ||
2021 | rcu_read_lock(); | |
421cb601 | 2022 | |
bec39940 | 2023 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
421cb601 | 2024 | ret = ust_app_start_trace(usess, app); |
48842b30 | 2025 | if (ret < 0) { |
5b4a0ec0 DG |
2026 | /* Continue to next apps even on error */ |
2027 | continue; | |
48842b30 | 2028 | } |
48842b30 | 2029 | } |
5b4a0ec0 | 2030 | |
48842b30 DG |
2031 | rcu_read_unlock(); |
2032 | ||
2033 | return 0; | |
2034 | } | |
487cf67c | 2035 | |
8be98f9a MD |
2036 | /* |
2037 | * Start tracing for the UST session. | |
2038 | */ | |
2039 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
2040 | { | |
2041 | int ret = 0; | |
bec39940 | 2042 | struct lttng_ht_iter iter; |
8be98f9a MD |
2043 | struct ust_app *app; |
2044 | ||
2045 | DBG("Stopping all UST traces"); | |
2046 | ||
2047 | rcu_read_lock(); | |
2048 | ||
bec39940 | 2049 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
8be98f9a MD |
2050 | ret = ust_app_stop_trace(usess, app); |
2051 | if (ret < 0) { | |
2052 | /* Continue to next apps even on error */ | |
2053 | continue; | |
2054 | } | |
2055 | } | |
2056 | ||
2057 | rcu_read_unlock(); | |
2058 | ||
2059 | return 0; | |
2060 | } | |
2061 | ||
84cd17c6 MD |
2062 | /* |
2063 | * Destroy app UST session. | |
2064 | */ | |
2065 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
2066 | { | |
2067 | int ret = 0; | |
bec39940 | 2068 | struct lttng_ht_iter iter; |
84cd17c6 MD |
2069 | struct ust_app *app; |
2070 | ||
2071 | DBG("Destroy all UST traces"); | |
2072 | ||
2073 | rcu_read_lock(); | |
2074 | ||
bec39940 | 2075 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
84cd17c6 MD |
2076 | ret = ust_app_destroy_trace(usess, app); |
2077 | if (ret < 0) { | |
2078 | /* Continue to next apps even on error */ | |
2079 | continue; | |
2080 | } | |
2081 | } | |
2082 | ||
2083 | rcu_read_unlock(); | |
2084 | ||
2085 | return 0; | |
2086 | } | |
2087 | ||
5b4a0ec0 DG |
2088 | /* |
2089 | * Add channels/events from UST global domain to registered apps at sock. | |
2090 | */ | |
487cf67c DG |
2091 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
2092 | { | |
2093 | int ret = 0; | |
bec39940 | 2094 | struct lttng_ht_iter iter, uiter; |
487cf67c DG |
2095 | struct ust_app *app; |
2096 | struct ust_app_session *ua_sess; | |
2097 | struct ust_app_channel *ua_chan; | |
2098 | struct ust_app_event *ua_event; | |
1f3580c7 DG |
2099 | |
2100 | if (usess == NULL) { | |
5b4a0ec0 | 2101 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
2102 | goto error; |
2103 | } | |
2104 | ||
a991f516 MD |
2105 | DBG2("UST app global update for app sock %d for session id %d", sock, |
2106 | usess->id); | |
487cf67c | 2107 | |
284d8f55 DG |
2108 | rcu_read_lock(); |
2109 | ||
487cf67c DG |
2110 | app = find_app_by_sock(sock); |
2111 | if (app == NULL) { | |
2112 | ERR("Failed to update app sock %d", sock); | |
2113 | goto error; | |
2114 | } | |
2115 | ||
421cb601 | 2116 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 2117 | if (ua_sess == NULL) { |
487cf67c DG |
2118 | goto error; |
2119 | } | |
2120 | ||
284d8f55 DG |
2121 | /* |
2122 | * We can iterate safely here over all UST app session sicne the create ust | |
2123 | * app session above made a shadow copy of the UST global domain from the | |
2124 | * ltt ust session. | |
2125 | */ | |
bec39940 DG |
2126 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2127 | node.node) { | |
284d8f55 DG |
2128 | ret = create_ust_channel(app, ua_sess, ua_chan); |
2129 | if (ret < 0) { | |
2130 | /* FIXME: Should we quit here or continue... */ | |
2131 | continue; | |
487cf67c DG |
2132 | } |
2133 | ||
284d8f55 | 2134 | /* For each events */ |
bec39940 DG |
2135 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
2136 | node.node) { | |
284d8f55 DG |
2137 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
2138 | if (ret < 0) { | |
2139 | /* FIXME: Should we quit here or continue... */ | |
2140 | continue; | |
487cf67c | 2141 | } |
36dc12cc | 2142 | } |
487cf67c DG |
2143 | } |
2144 | ||
36dc12cc | 2145 | if (usess->start_trace) { |
421cb601 | 2146 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 2147 | if (ret < 0) { |
36dc12cc DG |
2148 | goto error; |
2149 | } | |
2150 | ||
36dc12cc DG |
2151 | DBG2("UST trace started for app pid %d", app->key.pid); |
2152 | } | |
2153 | ||
487cf67c DG |
2154 | error: |
2155 | rcu_read_unlock(); | |
2156 | return; | |
2157 | } | |
55cc08a6 DG |
2158 | |
2159 | /* | |
2160 | * Add context to a specific channel for global UST domain. | |
2161 | */ | |
2162 | int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess, | |
2163 | struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx) | |
2164 | { | |
2165 | int ret = 0; | |
bec39940 DG |
2166 | struct lttng_ht_node_str *ua_chan_node; |
2167 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2168 | struct ust_app_channel *ua_chan = NULL; |
2169 | struct ust_app_session *ua_sess; | |
2170 | struct ust_app *app; | |
2171 | ||
2172 | rcu_read_lock(); | |
2173 | ||
bec39940 | 2174 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
55cc08a6 DG |
2175 | ua_sess = lookup_session_by_app(usess, app); |
2176 | if (ua_sess == NULL) { | |
2177 | continue; | |
2178 | } | |
2179 | ||
2180 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2181 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2182 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2183 | if (ua_chan_node == NULL) { |
2184 | continue; | |
2185 | } | |
2186 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2187 | node); | |
2188 | ||
2189 | ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app); | |
2190 | if (ret < 0) { | |
2191 | continue; | |
2192 | } | |
2193 | } | |
2194 | ||
55cc08a6 DG |
2195 | rcu_read_unlock(); |
2196 | return ret; | |
2197 | } | |
2198 | ||
2199 | /* | |
2200 | * Add context to a specific event in a channel for global UST domain. | |
2201 | */ | |
2202 | int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess, | |
2203 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
2204 | struct ltt_ust_context *uctx) | |
2205 | { | |
2206 | int ret = 0; | |
bec39940 DG |
2207 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; |
2208 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2209 | struct ust_app_session *ua_sess; |
2210 | struct ust_app_event *ua_event; | |
2211 | struct ust_app_channel *ua_chan = NULL; | |
2212 | struct ust_app *app; | |
2213 | ||
2214 | rcu_read_lock(); | |
2215 | ||
bec39940 | 2216 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
55cc08a6 DG |
2217 | ua_sess = lookup_session_by_app(usess, app); |
2218 | if (ua_sess == NULL) { | |
2219 | continue; | |
2220 | } | |
2221 | ||
2222 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2223 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2224 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2225 | if (ua_chan_node == NULL) { |
2226 | continue; | |
2227 | } | |
2228 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2229 | node); | |
2230 | ||
bec39940 DG |
2231 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
2232 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2233 | if (ua_event_node == NULL) { |
2234 | continue; | |
2235 | } | |
2236 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, | |
2237 | node); | |
2238 | ||
2239 | ret = create_ust_app_event_context(ua_sess, ua_event, &uctx->ctx, app); | |
2240 | if (ret < 0) { | |
2241 | continue; | |
2242 | } | |
2243 | } | |
2244 | ||
55cc08a6 DG |
2245 | rcu_read_unlock(); |
2246 | return ret; | |
2247 | } | |
76d45b40 DG |
2248 | |
2249 | /* | |
2250 | * Enable event for a channel from a UST session for a specific PID. | |
2251 | */ | |
2252 | int ust_app_enable_event_pid(struct ltt_ust_session *usess, | |
2253 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2254 | { | |
2255 | int ret = 0; | |
bec39940 DG |
2256 | struct lttng_ht_iter iter; |
2257 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
76d45b40 DG |
2258 | struct ust_app *app; |
2259 | struct ust_app_session *ua_sess; | |
2260 | struct ust_app_channel *ua_chan; | |
2261 | struct ust_app_event *ua_event; | |
2262 | ||
2263 | DBG("UST app enabling event %s for PID %d", uevent->attr.name, pid); | |
2264 | ||
2265 | rcu_read_lock(); | |
2266 | ||
2267 | app = ust_app_find_by_pid(pid); | |
2268 | if (app == NULL) { | |
2269 | ERR("UST app enable event per PID %d not found", pid); | |
2270 | ret = -1; | |
2271 | goto error; | |
2272 | } | |
2273 | ||
2274 | ua_sess = lookup_session_by_app(usess, app); | |
2275 | /* If ua_sess is NULL, there is a code flow error */ | |
2276 | assert(ua_sess); | |
2277 | ||
2278 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2279 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2280 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2281 | /* If the channel is not found, there is a code flow error */ |
2282 | assert(ua_chan_node); | |
2283 | ||
2284 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2285 | ||
bec39940 DG |
2286 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2287 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2288 | if (ua_event_node == NULL) { |
2289 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); | |
2290 | if (ret < 0) { | |
2291 | goto error; | |
2292 | } | |
2293 | } else { | |
2294 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2295 | ||
2296 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2297 | if (ret < 0) { | |
2298 | goto error; | |
2299 | } | |
2300 | } | |
2301 | ||
2302 | error: | |
2303 | rcu_read_unlock(); | |
2304 | return ret; | |
2305 | } | |
7f79d3a1 DG |
2306 | |
2307 | /* | |
2308 | * Disable event for a channel from a UST session for a specific PID. | |
2309 | */ | |
2310 | int ust_app_disable_event_pid(struct ltt_ust_session *usess, | |
2311 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2312 | { | |
2313 | int ret = 0; | |
bec39940 DG |
2314 | struct lttng_ht_iter iter; |
2315 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
7f79d3a1 DG |
2316 | struct ust_app *app; |
2317 | struct ust_app_session *ua_sess; | |
2318 | struct ust_app_channel *ua_chan; | |
2319 | struct ust_app_event *ua_event; | |
2320 | ||
2321 | DBG("UST app disabling event %s for PID %d", uevent->attr.name, pid); | |
2322 | ||
2323 | rcu_read_lock(); | |
2324 | ||
2325 | app = ust_app_find_by_pid(pid); | |
2326 | if (app == NULL) { | |
2327 | ERR("UST app disable event per PID %d not found", pid); | |
2328 | ret = -1; | |
2329 | goto error; | |
2330 | } | |
2331 | ||
2332 | ua_sess = lookup_session_by_app(usess, app); | |
2333 | /* If ua_sess is NULL, there is a code flow error */ | |
2334 | assert(ua_sess); | |
2335 | ||
2336 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2337 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2338 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2339 | if (ua_chan_node == NULL) { |
2340 | /* Channel does not exist, skip disabling */ | |
2341 | goto error; | |
2342 | } | |
2343 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2344 | ||
bec39940 DG |
2345 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2346 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2347 | if (ua_event_node == NULL) { |
2348 | /* Event does not exist, skip disabling */ | |
2349 | goto error; | |
2350 | } | |
2351 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2352 | ||
2353 | ret = disable_ust_app_event(ua_sess, ua_event, app); | |
2354 | if (ret < 0) { | |
2355 | goto error; | |
2356 | } | |
2357 | ||
2358 | error: | |
2359 | rcu_read_unlock(); | |
2360 | return ret; | |
2361 | } |