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 | ||
fc34caaa | 66 | /* Destroy each context of event */ |
bec39940 DG |
67 | cds_lfht_for_each_entry(ua_event->ctx->ht, &iter.iter, ua_ctx, |
68 | node.node) { | |
69 | ret = lttng_ht_del(ua_event->ctx, &iter); | |
55cc08a6 DG |
70 | assert(!ret); |
71 | delete_ust_app_ctx(sock, ua_ctx); | |
72 | } | |
bec39940 | 73 | lttng_ht_destroy(ua_event->ctx); |
d80a6244 | 74 | |
edb67388 DG |
75 | if (ua_event->obj != NULL) { |
76 | ustctl_release_object(sock, ua_event->obj); | |
77 | free(ua_event->obj); | |
78 | } | |
d80a6244 DG |
79 | free(ua_event); |
80 | } | |
81 | ||
82 | /* | |
83 | * Delete ust app stream safely. RCU read lock must be held before calling | |
84 | * this function. | |
85 | */ | |
8b366481 DG |
86 | static |
87 | void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream) | |
d80a6244 | 88 | { |
8b366481 DG |
89 | if (stream->obj) { |
90 | ustctl_release_object(sock, stream->obj); | |
91 | free(stream->obj); | |
92 | } | |
84cd17c6 | 93 | free(stream); |
d80a6244 DG |
94 | } |
95 | ||
96 | /* | |
97 | * Delete ust app channel safely. RCU read lock must be held before calling | |
98 | * this function. | |
99 | */ | |
8b366481 DG |
100 | static |
101 | void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan) | |
d80a6244 DG |
102 | { |
103 | int ret; | |
bec39940 | 104 | struct lttng_ht_iter iter; |
d80a6244 | 105 | struct ust_app_event *ua_event; |
55cc08a6 | 106 | struct ust_app_ctx *ua_ctx; |
d80a6244 DG |
107 | struct ltt_ust_stream *stream, *stmp; |
108 | ||
55cc08a6 | 109 | /* Wipe stream */ |
d80a6244 | 110 | cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) { |
84cd17c6 | 111 | cds_list_del(&stream->list); |
d80a6244 DG |
112 | delete_ust_app_stream(sock, stream); |
113 | } | |
114 | ||
55cc08a6 | 115 | /* Wipe context */ |
bec39940 DG |
116 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter.iter, ua_ctx, node.node) { |
117 | ret = lttng_ht_del(ua_chan->ctx, &iter); | |
55cc08a6 DG |
118 | assert(!ret); |
119 | delete_ust_app_ctx(sock, ua_ctx); | |
120 | } | |
bec39940 | 121 | lttng_ht_destroy(ua_chan->ctx); |
d80a6244 | 122 | |
55cc08a6 | 123 | /* Wipe events */ |
bec39940 DG |
124 | cds_lfht_for_each_entry(ua_chan->events->ht, &iter.iter, ua_event, |
125 | node.node) { | |
126 | ret = lttng_ht_del(ua_chan->events, &iter); | |
525b0740 | 127 | assert(!ret); |
d80a6244 DG |
128 | delete_ust_app_event(sock, ua_event); |
129 | } | |
bec39940 | 130 | lttng_ht_destroy(ua_chan->events); |
edb67388 DG |
131 | |
132 | if (ua_chan->obj != NULL) { | |
133 | ustctl_release_object(sock, ua_chan->obj); | |
134 | free(ua_chan->obj); | |
135 | } | |
84cd17c6 | 136 | free(ua_chan); |
d80a6244 DG |
137 | } |
138 | ||
139 | /* | |
140 | * Delete ust app session safely. RCU read lock must be held before calling | |
141 | * this function. | |
142 | */ | |
8b366481 DG |
143 | static |
144 | void delete_ust_app_session(int sock, struct ust_app_session *ua_sess) | |
d80a6244 DG |
145 | { |
146 | int ret; | |
bec39940 | 147 | struct lttng_ht_iter iter; |
d80a6244 DG |
148 | struct ust_app_channel *ua_chan; |
149 | ||
150 | if (ua_sess->metadata) { | |
8b366481 DG |
151 | if (ua_sess->metadata->stream_obj) { |
152 | ustctl_release_object(sock, ua_sess->metadata->stream_obj); | |
153 | free(ua_sess->metadata->stream_obj); | |
154 | } | |
155 | if (ua_sess->metadata->obj) { | |
156 | ustctl_release_object(sock, ua_sess->metadata->obj); | |
157 | free(ua_sess->metadata->obj); | |
158 | } | |
d80a6244 DG |
159 | } |
160 | ||
bec39940 DG |
161 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
162 | node.node) { | |
163 | ret = lttng_ht_del(ua_sess->channels, &iter); | |
525b0740 | 164 | assert(!ret); |
d80a6244 DG |
165 | delete_ust_app_channel(sock, ua_chan); |
166 | } | |
bec39940 | 167 | lttng_ht_destroy(ua_sess->channels); |
d80a6244 | 168 | |
aee6bafd MD |
169 | if (ua_sess->handle != -1) { |
170 | ustctl_release_handle(sock, ua_sess->handle); | |
171 | } | |
8b366481 | 172 | free(ua_sess); |
d80a6244 | 173 | } |
91d76f53 DG |
174 | |
175 | /* | |
284d8f55 DG |
176 | * Delete a traceable application structure from the global list. Never call |
177 | * this function outside of a call_rcu call. | |
91d76f53 | 178 | */ |
8b366481 DG |
179 | static |
180 | void delete_ust_app(struct ust_app *app) | |
91d76f53 | 181 | { |
8b366481 | 182 | int ret, sock; |
bec39940 | 183 | struct lttng_ht_iter iter; |
284d8f55 | 184 | struct ust_app_session *ua_sess; |
44d3bd01 | 185 | |
f6a9efaa | 186 | rcu_read_lock(); |
44d3bd01 | 187 | |
d80a6244 | 188 | /* Delete ust app sessions info */ |
6414a713 MD |
189 | sock = app->key.sock; |
190 | app->key.sock = -1; | |
d80a6244 | 191 | |
8b366481 | 192 | /* Wipe sessions */ |
bec39940 DG |
193 | cds_lfht_for_each_entry(app->sessions->ht, &iter.iter, ua_sess, |
194 | node.node) { | |
195 | ret = lttng_ht_del(app->sessions, &iter); | |
525b0740 | 196 | assert(!ret); |
284d8f55 | 197 | delete_ust_app_session(app->key.sock, ua_sess); |
d80a6244 | 198 | } |
bec39940 | 199 | lttng_ht_destroy(app->sessions); |
d80a6244 | 200 | |
6414a713 | 201 | /* |
bec39940 DG |
202 | * Wait until we have removed the key from the sock hash table before |
203 | * closing this socket, otherwise an application could re-use the socket ID | |
204 | * and race with the teardown, using the same hash table entry. | |
6414a713 MD |
205 | */ |
206 | close(sock); | |
d80a6244 | 207 | |
284d8f55 DG |
208 | DBG2("UST app pid %d deleted", app->key.pid); |
209 | free(app); | |
bec39940 | 210 | |
f6a9efaa | 211 | rcu_read_unlock(); |
099e26bd DG |
212 | } |
213 | ||
214 | /* | |
f6a9efaa | 215 | * URCU intermediate call to delete an UST app. |
099e26bd | 216 | */ |
8b366481 DG |
217 | static |
218 | void delete_ust_app_rcu(struct rcu_head *head) | |
099e26bd | 219 | { |
bec39940 DG |
220 | struct lttng_ht_node_ulong *node = |
221 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
222 | struct ust_app *app = |
223 | caa_container_of(node, struct ust_app, node); | |
224 | ||
bec39940 | 225 | DBG3("Call RCU deleting app PID %d", app->key.pid); |
f6a9efaa | 226 | delete_ust_app(app); |
099e26bd DG |
227 | } |
228 | ||
8b366481 DG |
229 | /* |
230 | * Alloc new UST app session. | |
231 | */ | |
232 | static | |
233 | struct ust_app_session *alloc_ust_app_session(void) | |
234 | { | |
235 | struct ust_app_session *ua_sess; | |
236 | ||
237 | /* Init most of the default value by allocating and zeroing */ | |
238 | ua_sess = zmalloc(sizeof(struct ust_app_session)); | |
239 | if (ua_sess == NULL) { | |
240 | PERROR("malloc"); | |
241 | goto error; | |
242 | } | |
243 | ||
244 | ua_sess->handle = -1; | |
bec39940 | 245 | ua_sess->channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
8b366481 DG |
246 | |
247 | return ua_sess; | |
248 | ||
249 | error: | |
250 | return NULL; | |
251 | } | |
252 | ||
253 | /* | |
254 | * Alloc new UST app channel. | |
255 | */ | |
256 | static | |
257 | struct ust_app_channel *alloc_ust_app_channel(char *name, | |
258 | struct lttng_ust_channel *attr) | |
259 | { | |
260 | struct ust_app_channel *ua_chan; | |
261 | ||
262 | /* Init most of the default value by allocating and zeroing */ | |
263 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); | |
264 | if (ua_chan == NULL) { | |
265 | PERROR("malloc"); | |
266 | goto error; | |
267 | } | |
268 | ||
269 | /* Setup channel name */ | |
270 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
271 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
272 | ||
273 | ua_chan->enabled = 1; | |
274 | ua_chan->handle = -1; | |
bec39940 DG |
275 | ua_chan->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
276 | ua_chan->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); | |
277 | lttng_ht_node_init_str(&ua_chan->node, ua_chan->name); | |
8b366481 DG |
278 | |
279 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); | |
280 | ||
281 | /* Copy attributes */ | |
282 | if (attr) { | |
283 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
284 | } | |
285 | ||
286 | DBG3("UST app channel %s allocated", ua_chan->name); | |
287 | ||
288 | return ua_chan; | |
289 | ||
290 | error: | |
291 | return NULL; | |
292 | } | |
293 | ||
294 | /* | |
295 | * Alloc new UST app event. | |
296 | */ | |
297 | static | |
298 | struct ust_app_event *alloc_ust_app_event(char *name, | |
299 | struct lttng_ust_event *attr) | |
300 | { | |
301 | struct ust_app_event *ua_event; | |
302 | ||
303 | /* Init most of the default value by allocating and zeroing */ | |
304 | ua_event = zmalloc(sizeof(struct ust_app_event)); | |
305 | if (ua_event == NULL) { | |
306 | PERROR("malloc"); | |
307 | goto error; | |
308 | } | |
309 | ||
310 | ua_event->enabled = 1; | |
311 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
312 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
bec39940 DG |
313 | ua_event->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
314 | lttng_ht_node_init_str(&ua_event->node, ua_event->name); | |
8b366481 DG |
315 | |
316 | /* Copy attributes */ | |
317 | if (attr) { | |
318 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
319 | } | |
320 | ||
321 | DBG3("UST app event %s allocated", ua_event->name); | |
322 | ||
323 | return ua_event; | |
324 | ||
325 | error: | |
326 | return NULL; | |
327 | } | |
328 | ||
329 | /* | |
330 | * Alloc new UST app context. | |
331 | */ | |
332 | static | |
333 | struct ust_app_ctx *alloc_ust_app_ctx(struct lttng_ust_context *uctx) | |
334 | { | |
335 | struct ust_app_ctx *ua_ctx; | |
336 | ||
337 | ua_ctx = zmalloc(sizeof(struct ust_app_ctx)); | |
338 | if (ua_ctx == NULL) { | |
339 | goto error; | |
340 | } | |
341 | ||
342 | if (uctx) { | |
343 | memcpy(&ua_ctx->ctx, uctx, sizeof(ua_ctx->ctx)); | |
344 | } | |
345 | ||
346 | DBG3("UST app context %d allocated", ua_ctx->ctx.ctx); | |
347 | ||
348 | error: | |
349 | return ua_ctx; | |
350 | } | |
351 | ||
099e26bd | 352 | /* |
421cb601 DG |
353 | * Find an ust_app using the sock and return it. RCU read side lock must be |
354 | * held before calling this helper function. | |
099e26bd | 355 | */ |
8b366481 DG |
356 | static |
357 | struct ust_app *find_app_by_sock(int sock) | |
099e26bd | 358 | { |
bec39940 | 359 | struct lttng_ht_node_ulong *node; |
f6a9efaa | 360 | struct ust_app_key *key; |
bec39940 | 361 | struct lttng_ht_iter iter; |
f6a9efaa | 362 | |
bec39940 DG |
363 | lttng_ht_lookup(ust_app_sock_key_map, (void *)((unsigned long) sock), |
364 | &iter); | |
365 | node = lttng_ht_iter_get_node_ulong(&iter); | |
f6a9efaa DG |
366 | if (node == NULL) { |
367 | DBG2("UST app find by sock %d key not found", sock); | |
f6a9efaa DG |
368 | goto error; |
369 | } | |
f6a9efaa DG |
370 | key = caa_container_of(node, struct ust_app_key, node); |
371 | ||
bec39940 DG |
372 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) key->pid), &iter); |
373 | node = lttng_ht_iter_get_node_ulong(&iter); | |
f6a9efaa DG |
374 | if (node == NULL) { |
375 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
376 | goto error; |
377 | } | |
f6a9efaa DG |
378 | return caa_container_of(node, struct ust_app, node); |
379 | ||
380 | error: | |
381 | return NULL; | |
099e26bd DG |
382 | } |
383 | ||
55cc08a6 DG |
384 | /* |
385 | * Create the channel context on the tracer. | |
386 | */ | |
387 | static | |
388 | int create_ust_channel_context(struct ust_app_channel *ua_chan, | |
389 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
390 | { | |
391 | int ret; | |
392 | ||
393 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
394 | ua_chan->obj, &ua_ctx->obj); | |
395 | if (ret < 0) { | |
396 | goto error; | |
397 | } | |
398 | ||
399 | ua_ctx->handle = ua_ctx->obj->handle; | |
400 | ||
401 | DBG2("UST app context added to channel %s successfully", ua_chan->name); | |
402 | ||
403 | error: | |
404 | return ret; | |
405 | } | |
406 | ||
407 | /* | |
408 | * Create the event context on the tracer. | |
409 | */ | |
410 | static | |
411 | int create_ust_event_context(struct ust_app_event *ua_event, | |
412 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
413 | { | |
414 | int ret; | |
415 | ||
416 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
417 | ua_event->obj, &ua_ctx->obj); | |
418 | if (ret < 0) { | |
419 | goto error; | |
420 | } | |
421 | ||
422 | ua_ctx->handle = ua_ctx->obj->handle; | |
423 | ||
424 | DBG2("UST app context added to event %s successfully", ua_event->name); | |
425 | ||
426 | error: | |
427 | return ret; | |
428 | } | |
429 | ||
9730260e DG |
430 | /* |
431 | * Disable the specified event on to UST tracer for the UST session. | |
432 | */ | |
433 | static int disable_ust_event(struct ust_app *app, | |
434 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
435 | { | |
436 | int ret; | |
437 | ||
438 | ret = ustctl_disable(app->key.sock, ua_event->obj); | |
439 | if (ret < 0) { | |
440 | ERR("UST app event %s disable failed for app (pid: %d) " | |
441 | "and session handle %d with ret %d", | |
442 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
443 | goto error; | |
444 | } | |
445 | ||
446 | DBG2("UST app event %s disabled successfully for app (pid: %d)", | |
447 | ua_event->attr.name, app->key.pid); | |
448 | ||
449 | error: | |
450 | return ret; | |
451 | } | |
452 | ||
78f0bacd DG |
453 | /* |
454 | * Disable the specified channel on to UST tracer for the UST session. | |
455 | */ | |
456 | static int disable_ust_channel(struct ust_app *app, | |
457 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
458 | { | |
459 | int ret; | |
460 | ||
461 | ret = ustctl_disable(app->key.sock, ua_chan->obj); | |
462 | if (ret < 0) { | |
463 | ERR("UST app channel %s disable failed for app (pid: %d) " | |
464 | "and session handle %d with ret %d", | |
465 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
466 | goto error; | |
467 | } | |
468 | ||
78f0bacd DG |
469 | DBG2("UST app channel %s disabled successfully for app (pid: %d)", |
470 | ua_chan->name, app->key.pid); | |
471 | ||
472 | error: | |
473 | return ret; | |
474 | } | |
475 | ||
476 | /* | |
477 | * Enable the specified channel on to UST tracer for the UST session. | |
478 | */ | |
479 | static int enable_ust_channel(struct ust_app *app, | |
480 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
481 | { | |
482 | int ret; | |
483 | ||
484 | ret = ustctl_enable(app->key.sock, ua_chan->obj); | |
485 | if (ret < 0) { | |
486 | ERR("UST app channel %s enable failed for app (pid: %d) " | |
487 | "and session handle %d with ret %d", | |
488 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
489 | goto error; | |
490 | } | |
491 | ||
492 | ua_chan->enabled = 1; | |
493 | ||
494 | DBG2("UST app channel %s enabled successfully for app (pid: %d)", | |
495 | ua_chan->name, app->key.pid); | |
496 | ||
497 | error: | |
498 | return ret; | |
499 | } | |
500 | ||
edb67388 DG |
501 | /* |
502 | * Enable the specified event on to UST tracer for the UST session. | |
503 | */ | |
504 | static int enable_ust_event(struct ust_app *app, | |
505 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
506 | { | |
507 | int ret; | |
508 | ||
509 | ret = ustctl_enable(app->key.sock, ua_event->obj); | |
510 | if (ret < 0) { | |
511 | ERR("UST app event %s enable failed for app (pid: %d) " | |
512 | "and session handle %d with ret %d", | |
513 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
514 | goto error; | |
515 | } | |
516 | ||
517 | DBG2("UST app event %s enabled successfully for app (pid: %d)", | |
518 | ua_event->attr.name, app->key.pid); | |
519 | ||
520 | error: | |
521 | return ret; | |
522 | } | |
523 | ||
099e26bd | 524 | /* |
5b4a0ec0 | 525 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 526 | */ |
5b4a0ec0 DG |
527 | static int open_ust_metadata(struct ust_app *app, |
528 | struct ust_app_session *ua_sess) | |
0177d773 | 529 | { |
5b4a0ec0 DG |
530 | int ret; |
531 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 532 | |
5b4a0ec0 DG |
533 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
534 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
535 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
536 | uattr.switch_timer_interval = | |
537 | ua_sess->metadata->attr.switch_timer_interval; | |
538 | uattr.read_timer_interval = | |
539 | ua_sess->metadata->attr.read_timer_interval; | |
540 | uattr.output = ua_sess->metadata->attr.output; | |
541 | ||
542 | /* UST tracer metadata creation */ | |
543 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
544 | &ua_sess->metadata->obj); | |
545 | if (ret < 0) { | |
fc34caaa DG |
546 | ERR("UST app open metadata failed for app pid:%d with ret %d", |
547 | app->key.pid, ret); | |
f6a9efaa | 548 | goto error; |
0177d773 | 549 | } |
f6a9efaa | 550 | |
6d3686da DG |
551 | ua_sess->metadata->handle = ua_sess->metadata->obj->handle; |
552 | ||
f6a9efaa | 553 | error: |
5b4a0ec0 | 554 | return ret; |
91d76f53 DG |
555 | } |
556 | ||
557 | /* | |
5b4a0ec0 | 558 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 559 | */ |
5b4a0ec0 DG |
560 | static int create_ust_stream(struct ust_app *app, |
561 | struct ust_app_session *ua_sess) | |
91d76f53 | 562 | { |
5b4a0ec0 | 563 | int ret; |
421cb601 | 564 | |
5b4a0ec0 DG |
565 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, |
566 | &ua_sess->metadata->stream_obj); | |
567 | if (ret < 0) { | |
568 | ERR("UST create metadata stream failed"); | |
421cb601 | 569 | goto error; |
91d76f53 | 570 | } |
421cb601 | 571 | |
421cb601 | 572 | error: |
5b4a0ec0 | 573 | return ret; |
91d76f53 DG |
574 | } |
575 | ||
b551a063 | 576 | /* |
5b4a0ec0 | 577 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 578 | */ |
5b4a0ec0 DG |
579 | static int create_ust_channel(struct ust_app *app, |
580 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 581 | { |
5b4a0ec0 | 582 | int ret; |
b551a063 | 583 | |
5b4a0ec0 DG |
584 | /* TODO: remove cast and use lttng-ust-abi.h */ |
585 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
586 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); | |
587 | if (ret < 0) { | |
58f3ca76 | 588 | ERR("Creating channel %s for app (pid: %d, sock: %d) " |
5b4a0ec0 DG |
589 | "and session handle %d with ret %d", |
590 | ua_chan->name, app->key.pid, app->key.sock, | |
591 | ua_sess->handle, ret); | |
b551a063 DG |
592 | goto error; |
593 | } | |
594 | ||
5b4a0ec0 | 595 | ua_chan->handle = ua_chan->obj->handle; |
b551a063 | 596 | |
5b4a0ec0 DG |
597 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
598 | ua_chan->name, app->key.pid, app->key.sock); | |
b551a063 | 599 | |
8535a6d9 DG |
600 | /* If channel is not enabled, disable it on the tracer */ |
601 | if (!ua_chan->enabled) { | |
602 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
603 | if (ret < 0) { | |
604 | goto error; | |
605 | } | |
606 | } | |
607 | ||
b551a063 DG |
608 | error: |
609 | return ret; | |
610 | } | |
611 | ||
91d76f53 | 612 | /* |
5b4a0ec0 | 613 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 614 | */ |
edb67388 DG |
615 | static |
616 | int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess, | |
617 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event) | |
91d76f53 | 618 | { |
5b4a0ec0 | 619 | int ret = 0; |
284d8f55 | 620 | |
5b4a0ec0 DG |
621 | /* Create UST event on tracer */ |
622 | ret = ustctl_create_event(app->key.sock, &ua_event->attr, ua_chan->obj, | |
623 | &ua_event->obj); | |
624 | if (ret < 0) { | |
fc34caaa DG |
625 | if (ret == -EEXIST) { |
626 | ret = 0; | |
627 | goto error; | |
628 | } | |
5b4a0ec0 DG |
629 | ERR("Error ustctl create event %s for app pid: %d with ret %d", |
630 | ua_event->attr.name, app->key.pid, ret); | |
631 | goto error; | |
91d76f53 | 632 | } |
f6a9efaa | 633 | |
5b4a0ec0 | 634 | ua_event->handle = ua_event->obj->handle; |
284d8f55 | 635 | |
5b4a0ec0 DG |
636 | DBG2("UST app event %s created successfully for pid:%d", |
637 | ua_event->attr.name, app->key.pid); | |
f6a9efaa | 638 | |
8535a6d9 | 639 | /* If event not enabled, disable it on the tracer */ |
fc34caaa | 640 | if (ua_event->enabled == 0) { |
8535a6d9 DG |
641 | ret = disable_ust_event(app, ua_sess, ua_event); |
642 | if (ret < 0) { | |
fc34caaa DG |
643 | /* |
644 | * If we hit an EPERM, something is wrong with our disable call. If | |
645 | * we get an EEXIST, there is a problem on the tracer side since we | |
646 | * just created it. | |
647 | */ | |
648 | switch (ret) { | |
649 | case -EPERM: | |
650 | /* Code flow problem */ | |
651 | assert(0); | |
652 | case -EEXIST: | |
653 | /* It's OK for our use case. */ | |
654 | ret = 0; | |
655 | break; | |
656 | default: | |
657 | break; | |
658 | } | |
8535a6d9 DG |
659 | goto error; |
660 | } | |
661 | } | |
662 | ||
5b4a0ec0 DG |
663 | error: |
664 | return ret; | |
91d76f53 | 665 | } |
48842b30 | 666 | |
5b4a0ec0 DG |
667 | /* |
668 | * Copy data between an UST app event and a LTT event. | |
669 | */ | |
421cb601 | 670 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
671 | struct ltt_ust_event *uevent) |
672 | { | |
bec39940 | 673 | struct lttng_ht_iter iter; |
55cc08a6 DG |
674 | struct ltt_ust_context *uctx; |
675 | struct ust_app_ctx *ua_ctx; | |
676 | ||
48842b30 DG |
677 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); |
678 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
679 | ||
fc34caaa DG |
680 | ua_event->enabled = uevent->enabled; |
681 | ||
5b4a0ec0 DG |
682 | /* Copy event attributes */ |
683 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
684 | ||
bec39940 | 685 | cds_lfht_for_each_entry(uevent->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
686 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
687 | if (ua_ctx == NULL) { | |
fc34caaa DG |
688 | /* malloc() failed. We should simply stop */ |
689 | return; | |
55cc08a6 | 690 | } |
fc34caaa | 691 | |
bec39940 DG |
692 | lttng_ht_node_init_ulong(&ua_ctx->node, |
693 | (unsigned long) ua_ctx->ctx.ctx); | |
694 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 | 695 | } |
48842b30 DG |
696 | } |
697 | ||
5b4a0ec0 DG |
698 | /* |
699 | * Copy data between an UST app channel and a LTT channel. | |
700 | */ | |
421cb601 | 701 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
702 | struct ltt_ust_channel *uchan) |
703 | { | |
bec39940 DG |
704 | struct lttng_ht_iter iter; |
705 | struct lttng_ht_node_str *ua_event_node; | |
48842b30 | 706 | struct ltt_ust_event *uevent; |
55cc08a6 | 707 | struct ltt_ust_context *uctx; |
48842b30 | 708 | struct ust_app_event *ua_event; |
55cc08a6 | 709 | struct ust_app_ctx *ua_ctx; |
48842b30 | 710 | |
fc34caaa | 711 | DBG2("UST app shadow copy of channel %s started", ua_chan->name); |
48842b30 DG |
712 | |
713 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
714 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
715 | /* Copy event attributes */ |
716 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 | 717 | |
fc34caaa DG |
718 | ua_chan->enabled = uchan->enabled; |
719 | ||
bec39940 | 720 | cds_lfht_for_each_entry(uchan->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
721 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
722 | if (ua_ctx == NULL) { | |
723 | continue; | |
724 | } | |
bec39940 DG |
725 | lttng_ht_node_init_ulong(&ua_ctx->node, |
726 | (unsigned long) ua_ctx->ctx.ctx); | |
727 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 | 728 | } |
48842b30 | 729 | |
421cb601 | 730 | /* Copy all events from ltt ust channel to ust app channel */ |
bec39940 DG |
731 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
732 | struct lttng_ht_iter uiter; | |
ba767faf | 733 | |
bec39940 DG |
734 | lttng_ht_lookup(ua_chan->events, (void *) uevent->attr.name, &uiter); |
735 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
48842b30 | 736 | if (ua_event_node == NULL) { |
421cb601 | 737 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 738 | uevent->attr.name); |
284d8f55 | 739 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 740 | if (ua_event == NULL) { |
5b4a0ec0 | 741 | continue; |
48842b30 | 742 | } |
421cb601 | 743 | shadow_copy_event(ua_event, uevent); |
bec39940 | 744 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
48842b30 | 745 | } |
48842b30 DG |
746 | } |
747 | ||
fc34caaa | 748 | DBG3("UST app shadow copy of channel %s done", ua_chan->name); |
48842b30 DG |
749 | } |
750 | ||
5b4a0ec0 DG |
751 | /* |
752 | * Copy data between a UST app session and a regular LTT session. | |
753 | */ | |
421cb601 | 754 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
bec39940 | 755 | struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 | 756 | { |
bec39940 DG |
757 | struct lttng_ht_node_str *ua_chan_node; |
758 | struct lttng_ht_iter iter; | |
48842b30 DG |
759 | struct ltt_ust_channel *uchan; |
760 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
761 | time_t rawtime; |
762 | struct tm *timeinfo; | |
763 | char datetime[16]; | |
764 | int ret; | |
765 | ||
766 | /* Get date and time for unique app path */ | |
767 | time(&rawtime); | |
768 | timeinfo = localtime(&rawtime); | |
769 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 770 | |
421cb601 | 771 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 | 772 | |
a991f516 | 773 | ua_sess->id = usess->id; |
6df2e2c9 MD |
774 | ua_sess->uid = usess->uid; |
775 | ua_sess->gid = usess->gid; | |
48842b30 | 776 | |
fc34caaa DG |
777 | ret = snprintf(ua_sess->path, PATH_MAX, "%s/%s-%d-%s", usess->pathname, |
778 | app->name, app->key.pid, datetime); | |
477d7741 MD |
779 | if (ret < 0) { |
780 | PERROR("asprintf UST shadow copy session"); | |
781 | /* TODO: We cannot return an error from here.. */ | |
782 | assert(0); | |
783 | } | |
784 | ||
48842b30 DG |
785 | /* TODO: support all UST domain */ |
786 | ||
787 | /* Iterate over all channels in global domain. */ | |
bec39940 DG |
788 | cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter, |
789 | uchan, node.node) { | |
790 | struct lttng_ht_iter uiter; | |
ba767faf | 791 | |
bec39940 DG |
792 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
793 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
5b4a0ec0 | 794 | if (ua_chan_node != NULL) { |
fc34caaa | 795 | /* Session exist. Contiuing. */ |
5b4a0ec0 DG |
796 | continue; |
797 | } | |
421cb601 | 798 | |
5b4a0ec0 DG |
799 | DBG2("Channel %s not found on shadow session copy, creating it", |
800 | uchan->name); | |
801 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
802 | if (ua_chan == NULL) { | |
fc34caaa | 803 | /* malloc failed FIXME: Might want to do handle ENOMEM .. */ |
5b4a0ec0 | 804 | continue; |
48842b30 DG |
805 | } |
806 | ||
5b4a0ec0 | 807 | shadow_copy_channel(ua_chan, uchan); |
bec39940 | 808 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
48842b30 DG |
809 | } |
810 | } | |
811 | ||
78f0bacd DG |
812 | /* |
813 | * Lookup sesison wrapper. | |
814 | */ | |
84cd17c6 MD |
815 | static |
816 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
bec39940 | 817 | struct ust_app *app, struct lttng_ht_iter *iter) |
84cd17c6 MD |
818 | { |
819 | /* Get right UST app session from app */ | |
2c348c10 | 820 | lttng_ht_lookup(app->sessions, (void *)((unsigned long) usess->id), iter); |
84cd17c6 MD |
821 | } |
822 | ||
421cb601 DG |
823 | /* |
824 | * Return ust app session from the app session hashtable using the UST session | |
a991f516 | 825 | * id. |
421cb601 | 826 | */ |
48842b30 DG |
827 | static struct ust_app_session *lookup_session_by_app( |
828 | struct ltt_ust_session *usess, struct ust_app *app) | |
829 | { | |
bec39940 DG |
830 | struct lttng_ht_iter iter; |
831 | struct lttng_ht_node_ulong *node; | |
48842b30 | 832 | |
84cd17c6 | 833 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 834 | node = lttng_ht_iter_get_node_ulong(&iter); |
48842b30 DG |
835 | if (node == NULL) { |
836 | goto error; | |
837 | } | |
838 | ||
839 | return caa_container_of(node, struct ust_app_session, node); | |
840 | ||
841 | error: | |
842 | return NULL; | |
843 | } | |
844 | ||
421cb601 DG |
845 | /* |
846 | * Create a UST session onto the tracer of app and add it the session | |
847 | * hashtable. | |
848 | * | |
849 | * Return ust app session or NULL on error. | |
850 | */ | |
851 | static struct ust_app_session *create_ust_app_session( | |
852 | struct ltt_ust_session *usess, struct ust_app *app) | |
853 | { | |
854 | int ret; | |
855 | struct ust_app_session *ua_sess; | |
856 | ||
857 | ua_sess = lookup_session_by_app(usess, app); | |
858 | if (ua_sess == NULL) { | |
a991f516 MD |
859 | DBG2("UST app pid: %d session id %d not found, creating it", |
860 | app->key.pid, usess->id); | |
421cb601 DG |
861 | ua_sess = alloc_ust_app_session(); |
862 | if (ua_sess == NULL) { | |
863 | /* Only malloc can failed so something is really wrong */ | |
fc34caaa | 864 | goto end; |
421cb601 | 865 | } |
477d7741 | 866 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
867 | } |
868 | ||
869 | if (ua_sess->handle == -1) { | |
870 | ret = ustctl_create_session(app->key.sock); | |
871 | if (ret < 0) { | |
fc34caaa | 872 | ERR("Creating session for app pid %d", app->key.pid); |
421cb601 DG |
873 | goto error; |
874 | } | |
875 | ||
421cb601 DG |
876 | ua_sess->handle = ret; |
877 | ||
878 | /* Add ust app session to app's HT */ | |
2c348c10 | 879 | lttng_ht_node_init_ulong(&ua_sess->node, (unsigned long) ua_sess->id); |
bec39940 | 880 | lttng_ht_add_unique_ulong(app->sessions, &ua_sess->node); |
421cb601 DG |
881 | |
882 | DBG2("UST app session created successfully with handle %d", ret); | |
883 | } | |
884 | ||
fc34caaa | 885 | end: |
421cb601 DG |
886 | return ua_sess; |
887 | ||
888 | error: | |
fc34caaa | 889 | delete_ust_app_session(-1, ua_sess); |
421cb601 DG |
890 | return NULL; |
891 | } | |
892 | ||
55cc08a6 DG |
893 | /* |
894 | * Create a context for the channel on the tracer. | |
895 | */ | |
896 | static | |
897 | int create_ust_app_channel_context(struct ust_app_session *ua_sess, | |
898 | struct ust_app_channel *ua_chan, struct lttng_ust_context *uctx, | |
899 | struct ust_app *app) | |
900 | { | |
901 | int ret = 0; | |
bec39940 DG |
902 | struct lttng_ht_iter iter; |
903 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
904 | struct ust_app_ctx *ua_ctx; |
905 | ||
906 | DBG2("UST app adding context to channel %s", ua_chan->name); | |
907 | ||
bec39940 DG |
908 | lttng_ht_lookup(ua_chan->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
909 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
910 | if (node != NULL) { |
911 | ret = -EEXIST; | |
912 | goto error; | |
913 | } | |
914 | ||
915 | ua_ctx = alloc_ust_app_ctx(uctx); | |
916 | if (ua_ctx == NULL) { | |
917 | /* malloc failed */ | |
918 | ret = -1; | |
919 | goto error; | |
920 | } | |
921 | ||
bec39940 DG |
922 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
923 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 DG |
924 | |
925 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
926 | if (ret < 0) { | |
927 | goto error; | |
928 | } | |
929 | ||
930 | error: | |
931 | return ret; | |
932 | } | |
933 | ||
934 | /* | |
935 | * Create an UST context and enable it for the event on the tracer. | |
936 | */ | |
937 | static | |
938 | int create_ust_app_event_context(struct ust_app_session *ua_sess, | |
939 | struct ust_app_event *ua_event, struct lttng_ust_context *uctx, | |
940 | struct ust_app *app) | |
941 | { | |
942 | int ret = 0; | |
bec39940 DG |
943 | struct lttng_ht_iter iter; |
944 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
945 | struct ust_app_ctx *ua_ctx; |
946 | ||
947 | DBG2("UST app adding context to event %s", ua_event->name); | |
948 | ||
bec39940 DG |
949 | lttng_ht_lookup(ua_event->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
950 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
951 | if (node != NULL) { |
952 | ret = -EEXIST; | |
953 | goto error; | |
954 | } | |
955 | ||
956 | ua_ctx = alloc_ust_app_ctx(uctx); | |
957 | if (ua_ctx == NULL) { | |
958 | /* malloc failed */ | |
959 | ret = -1; | |
960 | goto error; | |
961 | } | |
962 | ||
bec39940 DG |
963 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
964 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 DG |
965 | |
966 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
967 | if (ret < 0) { | |
968 | goto error; | |
969 | } | |
970 | ||
971 | error: | |
972 | return ret; | |
973 | } | |
974 | ||
edb67388 DG |
975 | /* |
976 | * Enable on the tracer side a ust app event for the session and channel. | |
977 | */ | |
978 | static | |
979 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 980 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
981 | { |
982 | int ret; | |
983 | ||
984 | ret = enable_ust_event(app, ua_sess, ua_event); | |
985 | if (ret < 0) { | |
986 | goto error; | |
987 | } | |
988 | ||
989 | ua_event->enabled = 1; | |
990 | ||
991 | error: | |
992 | return ret; | |
993 | } | |
994 | ||
9730260e DG |
995 | /* |
996 | * Disable on the tracer side a ust app event for the session and channel. | |
997 | */ | |
998 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
7f79d3a1 | 999 | struct ust_app_event *ua_event, struct ust_app *app) |
9730260e DG |
1000 | { |
1001 | int ret; | |
1002 | ||
1003 | ret = disable_ust_event(app, ua_sess, ua_event); | |
1004 | if (ret < 0) { | |
1005 | goto error; | |
1006 | } | |
1007 | ||
1008 | ua_event->enabled = 0; | |
1009 | ||
1010 | error: | |
1011 | return ret; | |
1012 | } | |
1013 | ||
78f0bacd DG |
1014 | /* |
1015 | * Lookup ust app channel for session and disable it on the tracer side. | |
1016 | */ | |
8535a6d9 DG |
1017 | static |
1018 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
1019 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 1020 | { |
8535a6d9 | 1021 | int ret; |
78f0bacd DG |
1022 | |
1023 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
1024 | if (ret < 0) { | |
1025 | goto error; | |
1026 | } | |
1027 | ||
8535a6d9 DG |
1028 | ua_chan->enabled = 0; |
1029 | ||
78f0bacd DG |
1030 | error: |
1031 | return ret; | |
1032 | } | |
1033 | ||
1034 | /* | |
1035 | * Lookup ust app channel for session and enable it on the tracer side. | |
1036 | */ | |
1037 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
1038 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
1039 | { | |
1040 | int ret = 0; | |
bec39940 DG |
1041 | struct lttng_ht_iter iter; |
1042 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1043 | struct ust_app_channel *ua_chan; |
1044 | ||
bec39940 DG |
1045 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1046 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
78f0bacd | 1047 | if (ua_chan_node == NULL) { |
a991f516 MD |
1048 | DBG2("Unable to find channel %s in ust session id %u", |
1049 | uchan->name, ua_sess->id); | |
78f0bacd DG |
1050 | goto error; |
1051 | } | |
1052 | ||
1053 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1054 | ||
1055 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
1056 | if (ret < 0) { | |
1057 | goto error; | |
1058 | } | |
1059 | ||
1060 | error: | |
1061 | return ret; | |
1062 | } | |
1063 | ||
284d8f55 | 1064 | /* |
5b4a0ec0 | 1065 | * Create UST app channel and create it on the tracer. |
284d8f55 | 1066 | */ |
5b4a0ec0 DG |
1067 | static struct ust_app_channel *create_ust_app_channel( |
1068 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
1069 | struct ust_app *app) | |
1070 | { | |
1071 | int ret = 0; | |
bec39940 DG |
1072 | struct lttng_ht_iter iter; |
1073 | struct lttng_ht_node_str *ua_chan_node; | |
5b4a0ec0 DG |
1074 | struct ust_app_channel *ua_chan; |
1075 | ||
1076 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1077 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1078 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
fc34caaa | 1079 | if (ua_chan_node != NULL) { |
5b4a0ec0 | 1080 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
fc34caaa | 1081 | goto end; |
5b4a0ec0 DG |
1082 | } |
1083 | ||
fc34caaa DG |
1084 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); |
1085 | if (ua_chan == NULL) { | |
1086 | /* Only malloc can fail here */ | |
1087 | goto error; | |
1088 | } | |
1089 | shadow_copy_channel(ua_chan, uchan); | |
1090 | ||
5b4a0ec0 DG |
1091 | ret = create_ust_channel(app, ua_sess, ua_chan); |
1092 | if (ret < 0) { | |
fc34caaa DG |
1093 | /* Not found previously means that it does not exist on the tracer */ |
1094 | assert(ret != -EEXIST); | |
5b4a0ec0 DG |
1095 | goto error; |
1096 | } | |
1097 | ||
58f3ca76 DG |
1098 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
1099 | ||
fc34caaa DG |
1100 | DBG2("UST app create channel %s for PID %d completed", ua_chan->name, |
1101 | app->key.pid); | |
1102 | ||
1103 | end: | |
5b4a0ec0 DG |
1104 | return ua_chan; |
1105 | ||
1106 | error: | |
fc34caaa | 1107 | delete_ust_app_channel(-1, ua_chan); |
5b4a0ec0 DG |
1108 | return NULL; |
1109 | } | |
1110 | ||
1111 | /* | |
1112 | * Create UST app event and create it on the tracer side. | |
1113 | */ | |
edb67388 DG |
1114 | static |
1115 | int create_ust_app_event(struct ust_app_session *ua_sess, | |
1116 | struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent, | |
1117 | struct ust_app *app) | |
284d8f55 | 1118 | { |
edb67388 | 1119 | int ret = 0; |
bec39940 DG |
1120 | struct lttng_ht_iter iter; |
1121 | struct lttng_ht_node_str *ua_event_node; | |
5b4a0ec0 | 1122 | struct ust_app_event *ua_event; |
284d8f55 | 1123 | |
5b4a0ec0 | 1124 | /* Get event node */ |
bec39940 DG |
1125 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
1126 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
edb67388 | 1127 | if (ua_event_node != NULL) { |
fc34caaa | 1128 | ret = -EEXIST; |
edb67388 DG |
1129 | goto end; |
1130 | } | |
5b4a0ec0 | 1131 | |
edb67388 DG |
1132 | /* Does not exist so create one */ |
1133 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
1134 | if (ua_event == NULL) { | |
1135 | /* Only malloc can failed so something is really wrong */ | |
1136 | ret = -ENOMEM; | |
fc34caaa | 1137 | goto end; |
5b4a0ec0 | 1138 | } |
edb67388 | 1139 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 1140 | |
edb67388 | 1141 | /* Create it on the tracer side */ |
5b4a0ec0 | 1142 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 1143 | if (ret < 0) { |
fc34caaa DG |
1144 | /* Not found previously means that it does not exist on the tracer */ |
1145 | assert(ret != -EEXIST); | |
284d8f55 DG |
1146 | goto error; |
1147 | } | |
1148 | ||
bec39940 | 1149 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
284d8f55 | 1150 | |
fc34caaa DG |
1151 | DBG2("UST app create event %s for PID %d completed", ua_event->name, |
1152 | app->key.pid); | |
7f79d3a1 | 1153 | |
edb67388 | 1154 | end: |
fc34caaa DG |
1155 | return ret; |
1156 | ||
5b4a0ec0 | 1157 | error: |
fc34caaa DG |
1158 | /* Valid. Calling here is already in a read side lock */ |
1159 | delete_ust_app_event(-1, ua_event); | |
edb67388 | 1160 | return ret; |
5b4a0ec0 DG |
1161 | } |
1162 | ||
1163 | /* | |
1164 | * Create UST metadata and open it on the tracer side. | |
1165 | */ | |
1166 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
1167 | char *pathname, struct ust_app *app) | |
1168 | { | |
1169 | int ret = 0; | |
1170 | ||
1171 | if (ua_sess->metadata == NULL) { | |
1172 | /* Allocate UST metadata */ | |
1173 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
1174 | if (ua_sess->metadata == NULL) { | |
fc34caaa | 1175 | /* malloc() failed */ |
5b4a0ec0 DG |
1176 | goto error; |
1177 | } | |
1178 | ||
1179 | ret = open_ust_metadata(app, ua_sess); | |
1180 | if (ret < 0) { | |
fc34caaa DG |
1181 | /* Cleanup failed metadata struct */ |
1182 | free(ua_sess->metadata); | |
5b4a0ec0 DG |
1183 | goto error; |
1184 | } | |
1185 | ||
1186 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
1187 | } | |
1188 | ||
1189 | /* Open UST metadata stream */ | |
1190 | if (ua_sess->metadata->stream_obj == NULL) { | |
1191 | ret = create_ust_stream(app, ua_sess); | |
1192 | if (ret < 0) { | |
1193 | goto error; | |
1194 | } | |
1195 | ||
67f747d8 MD |
1196 | ret = mkdir_run_as(ua_sess->path, S_IRWXU | S_IRWXG, |
1197 | ua_sess->uid, ua_sess->gid); | |
5b4a0ec0 DG |
1198 | if (ret < 0) { |
1199 | PERROR("mkdir UST metadata"); | |
1200 | goto error; | |
1201 | } | |
1202 | ||
477d7741 MD |
1203 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
1204 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
1205 | if (ret < 0) { |
1206 | PERROR("asprintf UST create stream"); | |
1207 | goto error; | |
1208 | } | |
1209 | ||
1210 | DBG2("UST metadata stream object created for app pid %d", | |
1211 | app->key.pid); | |
1212 | } else { | |
1213 | ERR("Attempting to create stream without metadata opened"); | |
1214 | goto error; | |
1215 | } | |
1216 | ||
1217 | return 0; | |
1218 | ||
1219 | error: | |
1220 | return -1; | |
1221 | } | |
1222 | ||
1223 | /* | |
1224 | * Return pointer to traceable apps list. | |
1225 | */ | |
bec39940 | 1226 | struct lttng_ht *ust_app_get_ht(void) |
5b4a0ec0 DG |
1227 | { |
1228 | return ust_app_ht; | |
1229 | } | |
1230 | ||
1231 | /* | |
1232 | * Return ust app pointer or NULL if not found. | |
1233 | */ | |
1234 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
1235 | { | |
bec39940 DG |
1236 | struct lttng_ht_node_ulong *node; |
1237 | struct lttng_ht_iter iter; | |
5b4a0ec0 DG |
1238 | |
1239 | rcu_read_lock(); | |
bec39940 DG |
1240 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) pid), &iter); |
1241 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1242 | if (node == NULL) { |
1243 | DBG2("UST app no found with pid %d", pid); | |
1244 | goto error; | |
1245 | } | |
1246 | rcu_read_unlock(); | |
1247 | ||
1248 | DBG2("Found UST app by pid %d", pid); | |
1249 | ||
1250 | return caa_container_of(node, struct ust_app, node); | |
1251 | ||
1252 | error: | |
1253 | rcu_read_unlock(); | |
1254 | return NULL; | |
1255 | } | |
1256 | ||
1257 | /* | |
1258 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
1259 | * add it to the global traceable app list. | |
1260 | * | |
0df502fd MD |
1261 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
1262 | * bitness is not supported. | |
5b4a0ec0 DG |
1263 | */ |
1264 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
1265 | { | |
1266 | struct ust_app *lta; | |
1267 | ||
7753dea8 MD |
1268 | if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL) |
1269 | || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) { | |
f943b0fb | 1270 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1271 | "%d-bit long, but no consumerd for this long size is available.\n", |
1272 | msg->name, msg->pid, msg->bits_per_long); | |
88ff5b7f | 1273 | close(sock); |
0df502fd MD |
1274 | return -EINVAL; |
1275 | } | |
5b4a0ec0 DG |
1276 | lta = zmalloc(sizeof(struct ust_app)); |
1277 | if (lta == NULL) { | |
1278 | PERROR("malloc"); | |
1279 | return -ENOMEM; | |
1280 | } | |
1281 | ||
1282 | lta->ppid = msg->ppid; | |
1283 | lta->uid = msg->uid; | |
1284 | lta->gid = msg->gid; | |
7753dea8 | 1285 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1286 | lta->v_major = msg->major; |
1287 | lta->v_minor = msg->minor; | |
1288 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1289 | lta->name[16] = '\0'; | |
bec39940 | 1290 | lta->sessions = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
5b4a0ec0 DG |
1291 | |
1292 | /* Set key map */ | |
1293 | lta->key.pid = msg->pid; | |
bec39940 | 1294 | lttng_ht_node_init_ulong(<a->node, (unsigned long)lta->key.pid); |
5b4a0ec0 | 1295 | lta->key.sock = sock; |
bec39940 | 1296 | lttng_ht_node_init_ulong(<a->key.node, (unsigned long)lta->key.sock); |
5b4a0ec0 DG |
1297 | |
1298 | rcu_read_lock(); | |
bec39940 DG |
1299 | lttng_ht_add_unique_ulong(ust_app_sock_key_map, <a->key.node); |
1300 | lttng_ht_add_unique_ulong(ust_app_ht, <a->node); | |
5b4a0ec0 DG |
1301 | rcu_read_unlock(); |
1302 | ||
1303 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
1304 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, | |
1305 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
1306 | ||
1307 | return 0; | |
1308 | } | |
1309 | ||
1310 | /* | |
1311 | * Unregister app by removing it from the global traceable app list and freeing | |
1312 | * the data struct. | |
1313 | * | |
1314 | * The socket is already closed at this point so no close to sock. | |
1315 | */ | |
1316 | void ust_app_unregister(int sock) | |
1317 | { | |
1318 | struct ust_app *lta; | |
bec39940 DG |
1319 | struct lttng_ht_node_ulong *node; |
1320 | struct lttng_ht_iter iter; | |
525b0740 | 1321 | int ret; |
5b4a0ec0 DG |
1322 | |
1323 | rcu_read_lock(); | |
1324 | lta = find_app_by_sock(sock); | |
1325 | if (lta == NULL) { | |
1326 | ERR("Unregister app sock %d not found!", sock); | |
1327 | goto error; | |
1328 | } | |
1329 | ||
1330 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
1331 | ||
886459c6 MD |
1332 | /* Remove application from socket hash table */ |
1333 | lttng_ht_lookup(ust_app_sock_key_map, (void *)((unsigned long) sock), &iter); | |
1334 | ret = lttng_ht_del(ust_app_sock_key_map, &iter); | |
1335 | assert(!ret); | |
1336 | ||
5b4a0ec0 | 1337 | /* Get the node reference for a call_rcu */ |
bec39940 DG |
1338 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) lta->key.pid), &iter); |
1339 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1340 | if (node == NULL) { |
1341 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
1342 | goto error; | |
1343 | } | |
284d8f55 | 1344 | |
886459c6 | 1345 | /* Remove application from PID hash table */ |
bec39940 | 1346 | ret = lttng_ht_del(ust_app_ht, &iter); |
525b0740 | 1347 | assert(!ret); |
5b4a0ec0 | 1348 | call_rcu(&node->head, delete_ust_app_rcu); |
284d8f55 | 1349 | error: |
5b4a0ec0 DG |
1350 | rcu_read_unlock(); |
1351 | return; | |
284d8f55 DG |
1352 | } |
1353 | ||
1354 | /* | |
5b4a0ec0 | 1355 | * Return traceable_app_count |
284d8f55 | 1356 | */ |
5b4a0ec0 | 1357 | unsigned long ust_app_list_count(void) |
284d8f55 | 1358 | { |
5b4a0ec0 | 1359 | unsigned long count; |
284d8f55 | 1360 | |
5b4a0ec0 | 1361 | rcu_read_lock(); |
bec39940 | 1362 | count = lttng_ht_get_count(ust_app_ht); |
5b4a0ec0 | 1363 | rcu_read_unlock(); |
284d8f55 | 1364 | |
5b4a0ec0 | 1365 | return count; |
284d8f55 DG |
1366 | } |
1367 | ||
5b4a0ec0 DG |
1368 | /* |
1369 | * Fill events array with all events name of all registered apps. | |
1370 | */ | |
1371 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1372 | { |
5b4a0ec0 DG |
1373 | int ret, handle; |
1374 | size_t nbmem, count = 0; | |
bec39940 | 1375 | struct lttng_ht_iter iter; |
5b4a0ec0 DG |
1376 | struct ust_app *app; |
1377 | struct lttng_event *tmp; | |
421cb601 | 1378 | |
5b4a0ec0 DG |
1379 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1380 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1381 | if (tmp == NULL) { | |
1382 | PERROR("zmalloc ust app events"); | |
1383 | ret = -ENOMEM; | |
421cb601 DG |
1384 | goto error; |
1385 | } | |
1386 | ||
5b4a0ec0 | 1387 | rcu_read_lock(); |
421cb601 | 1388 | |
bec39940 | 1389 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
90eaa0d2 | 1390 | struct lttng_ust_tracepoint_iter uiter; |
ac3bd9c0 | 1391 | |
5b4a0ec0 DG |
1392 | handle = ustctl_tracepoint_list(app->key.sock); |
1393 | if (handle < 0) { | |
1394 | ERR("UST app list events getting handle failed for app pid %d", | |
1395 | app->key.pid); | |
1396 | continue; | |
1397 | } | |
421cb601 | 1398 | |
5b4a0ec0 | 1399 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, |
90eaa0d2 | 1400 | &uiter)) != -ENOENT) { |
815564d8 MD |
1401 | if (count >= nbmem) { |
1402 | DBG2("Reallocating event list from %zu to %zu entries", nbmem, | |
1403 | 2 * nbmem); | |
1404 | nbmem *= 2; | |
2f221590 | 1405 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event)); |
5b4a0ec0 DG |
1406 | if (tmp == NULL) { |
1407 | PERROR("realloc ust app events"); | |
1408 | ret = -ENOMEM; | |
1409 | goto rcu_error; | |
1410 | } | |
1411 | } | |
90eaa0d2 DG |
1412 | memcpy(tmp[count].name, uiter.name, LTTNG_UST_SYM_NAME_LEN); |
1413 | memcpy(tmp[count].loglevel, uiter.loglevel, LTTNG_UST_SYM_NAME_LEN); | |
1414 | tmp[count].loglevel_value = uiter.loglevel_value; | |
5b4a0ec0 DG |
1415 | tmp[count].type = LTTNG_UST_TRACEPOINT; |
1416 | tmp[count].pid = app->key.pid; | |
1417 | tmp[count].enabled = -1; | |
1418 | count++; | |
421cb601 | 1419 | } |
421cb601 DG |
1420 | } |
1421 | ||
5b4a0ec0 DG |
1422 | ret = count; |
1423 | *events = tmp; | |
421cb601 | 1424 | |
5b4a0ec0 | 1425 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1426 | |
5b4a0ec0 DG |
1427 | rcu_error: |
1428 | rcu_read_unlock(); | |
421cb601 | 1429 | error: |
5b4a0ec0 | 1430 | return ret; |
421cb601 DG |
1431 | } |
1432 | ||
5b4a0ec0 DG |
1433 | /* |
1434 | * Free and clean all traceable apps of the global list. | |
1435 | */ | |
1436 | void ust_app_clean_list(void) | |
421cb601 | 1437 | { |
5b4a0ec0 | 1438 | int ret; |
bec39940 DG |
1439 | struct lttng_ht_iter iter; |
1440 | struct lttng_ht_node_ulong *node; | |
421cb601 | 1441 | |
5b4a0ec0 | 1442 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1443 | |
5b4a0ec0 | 1444 | rcu_read_lock(); |
421cb601 | 1445 | |
bec39940 DG |
1446 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, node, node) { |
1447 | ret = lttng_ht_del(ust_app_ht, &iter); | |
525b0740 | 1448 | assert(!ret); |
bec39940 | 1449 | call_rcu(&node->head, delete_ust_app_rcu); |
421cb601 | 1450 | } |
bec39940 DG |
1451 | /* Destroy is done only when the ht is empty */ |
1452 | lttng_ht_destroy(ust_app_ht); | |
421cb601 | 1453 | |
bec39940 DG |
1454 | cds_lfht_for_each_entry(ust_app_sock_key_map->ht, &iter.iter, node, node) { |
1455 | ret = lttng_ht_del(ust_app_sock_key_map, &iter); | |
1456 | assert(!ret); | |
1457 | } | |
1458 | /* Destroy is done only when the ht is empty */ | |
1459 | lttng_ht_destroy(ust_app_sock_key_map); | |
421cb601 | 1460 | |
5b4a0ec0 DG |
1461 | rcu_read_unlock(); |
1462 | } | |
1463 | ||
1464 | /* | |
1465 | * Init UST app hash table. | |
1466 | */ | |
1467 | void ust_app_ht_alloc(void) | |
1468 | { | |
bec39940 DG |
1469 | ust_app_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1470 | ust_app_sock_key_map = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
421cb601 DG |
1471 | } |
1472 | ||
78f0bacd DG |
1473 | /* |
1474 | * For a specific UST session, disable the channel for all registered apps. | |
1475 | */ | |
35a9059d | 1476 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1477 | struct ltt_ust_channel *uchan) |
1478 | { | |
1479 | int ret = 0; | |
bec39940 DG |
1480 | struct lttng_ht_iter iter; |
1481 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1482 | struct ust_app *app; |
1483 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1484 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1485 | |
1486 | if (usess == NULL || uchan == NULL) { | |
1487 | ERR("Disabling UST global channel with NULL values"); | |
1488 | ret = -1; | |
1489 | goto error; | |
1490 | } | |
1491 | ||
a991f516 MD |
1492 | DBG2("UST app disabling channel %s from global domain for session id %d", |
1493 | uchan->name, usess->id); | |
78f0bacd DG |
1494 | |
1495 | rcu_read_lock(); | |
1496 | ||
1497 | /* For every registered applications */ | |
bec39940 DG |
1498 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
1499 | struct lttng_ht_iter uiter; | |
78f0bacd DG |
1500 | ua_sess = lookup_session_by_app(usess, app); |
1501 | if (ua_sess == NULL) { | |
1502 | continue; | |
1503 | } | |
1504 | ||
8535a6d9 | 1505 | /* Get channel */ |
bec39940 DG |
1506 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1507 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
8535a6d9 DG |
1508 | /* If the session if found for the app, the channel must be there */ |
1509 | assert(ua_chan_node); | |
1510 | ||
1511 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1512 | /* The channel must not be already disabled */ | |
1513 | assert(ua_chan->enabled == 1); | |
1514 | ||
1515 | /* Disable channel onto application */ | |
1516 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1517 | if (ret < 0) { |
1518 | /* XXX: We might want to report this error at some point... */ | |
1519 | continue; | |
1520 | } | |
1521 | } | |
1522 | ||
1523 | rcu_read_unlock(); | |
1524 | ||
1525 | error: | |
1526 | return ret; | |
1527 | } | |
1528 | ||
1529 | /* | |
1530 | * For a specific UST session, enable the channel for all registered apps. | |
1531 | */ | |
35a9059d | 1532 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1533 | struct ltt_ust_channel *uchan) |
1534 | { | |
1535 | int ret = 0; | |
bec39940 | 1536 | struct lttng_ht_iter iter; |
78f0bacd DG |
1537 | struct ust_app *app; |
1538 | struct ust_app_session *ua_sess; | |
1539 | ||
1540 | if (usess == NULL || uchan == NULL) { | |
1541 | ERR("Adding UST global channel to NULL values"); | |
1542 | ret = -1; | |
1543 | goto error; | |
1544 | } | |
1545 | ||
a991f516 MD |
1546 | DBG2("UST app enabling channel %s to global domain for session id %d", |
1547 | uchan->name, usess->id); | |
78f0bacd DG |
1548 | |
1549 | rcu_read_lock(); | |
1550 | ||
1551 | /* For every registered applications */ | |
bec39940 | 1552 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
78f0bacd DG |
1553 | ua_sess = lookup_session_by_app(usess, app); |
1554 | if (ua_sess == NULL) { | |
1555 | continue; | |
1556 | } | |
1557 | ||
1558 | /* Enable channel onto application */ | |
1559 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1560 | if (ret < 0) { | |
1561 | /* XXX: We might want to report this error at some point... */ | |
1562 | continue; | |
1563 | } | |
1564 | } | |
1565 | ||
1566 | rcu_read_unlock(); | |
1567 | ||
1568 | error: | |
1569 | return ret; | |
1570 | } | |
1571 | ||
b0a40d28 DG |
1572 | /* |
1573 | * Disable an event in a channel and for a specific session. | |
1574 | */ | |
35a9059d DG |
1575 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
1576 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
1577 | { |
1578 | int ret = 0; | |
bec39940 DG |
1579 | struct lttng_ht_iter iter, uiter; |
1580 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
b0a40d28 DG |
1581 | struct ust_app *app; |
1582 | struct ust_app_session *ua_sess; | |
1583 | struct ust_app_channel *ua_chan; | |
1584 | struct ust_app_event *ua_event; | |
1585 | ||
1586 | DBG("UST app disabling event %s for all apps in channel " | |
a991f516 | 1587 | "%s for session id %d", uevent->attr.name, uchan->name, usess->id); |
b0a40d28 DG |
1588 | |
1589 | rcu_read_lock(); | |
1590 | ||
1591 | /* For all registered applications */ | |
bec39940 | 1592 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
b0a40d28 DG |
1593 | ua_sess = lookup_session_by_app(usess, app); |
1594 | if (ua_sess == NULL) { | |
1595 | /* Next app */ | |
1596 | continue; | |
1597 | } | |
1598 | ||
1599 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1600 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1601 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 | 1602 | if (ua_chan_node == NULL) { |
a991f516 MD |
1603 | DBG2("Channel %s not found in session id %d for app pid %d." |
1604 | "Skipping", uchan->name, usess->id, app->key.pid); | |
b0a40d28 DG |
1605 | continue; |
1606 | } | |
1607 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1608 | ||
bec39940 DG |
1609 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
1610 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 DG |
1611 | if (ua_event_node == NULL) { |
1612 | DBG2("Event %s not found in channel %s for app pid %d." | |
35a9059d | 1613 | "Skipping", uevent->attr.name, uchan->name, app->key.pid); |
b0a40d28 DG |
1614 | continue; |
1615 | } | |
1616 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1617 | ||
7f79d3a1 | 1618 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
b0a40d28 DG |
1619 | if (ret < 0) { |
1620 | /* XXX: Report error someday... */ | |
1621 | continue; | |
1622 | } | |
1623 | } | |
1624 | ||
1625 | rcu_read_unlock(); | |
1626 | ||
1627 | return ret; | |
1628 | } | |
1629 | ||
9730260e | 1630 | /* |
edb67388 | 1631 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
1632 | * registered apps. |
1633 | */ | |
35a9059d | 1634 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
1635 | struct ltt_ust_channel *uchan) |
1636 | { | |
1637 | int ret = 0; | |
bec39940 DG |
1638 | struct lttng_ht_iter iter, uiter; |
1639 | struct lttng_ht_node_str *ua_chan_node; | |
9730260e DG |
1640 | struct ust_app *app; |
1641 | struct ust_app_session *ua_sess; | |
1642 | struct ust_app_channel *ua_chan; | |
1643 | struct ust_app_event *ua_event; | |
1644 | ||
1645 | DBG("UST app disabling all event for all apps in channel " | |
a991f516 | 1646 | "%s for session id %d", uchan->name, usess->id); |
9730260e DG |
1647 | |
1648 | rcu_read_lock(); | |
1649 | ||
1650 | /* For all registered applications */ | |
bec39940 | 1651 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
9730260e | 1652 | ua_sess = lookup_session_by_app(usess, app); |
edb67388 DG |
1653 | /* If ua_sess is NULL, there is a code flow error */ |
1654 | assert(ua_sess); | |
9730260e DG |
1655 | |
1656 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1657 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1658 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1659 | /* If the channel is not found, there is a code flow error */ |
1660 | assert(ua_chan_node); | |
1661 | ||
9730260e DG |
1662 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1663 | ||
1664 | /* Disable each events of channel */ | |
bec39940 DG |
1665 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
1666 | node.node) { | |
7f79d3a1 | 1667 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
9730260e DG |
1668 | if (ret < 0) { |
1669 | /* XXX: Report error someday... */ | |
1670 | continue; | |
1671 | } | |
1672 | } | |
1673 | } | |
1674 | ||
1675 | rcu_read_unlock(); | |
1676 | ||
1677 | return ret; | |
1678 | } | |
1679 | ||
421cb601 | 1680 | /* |
5b4a0ec0 | 1681 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1682 | */ |
35a9059d | 1683 | int ust_app_create_channel_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1684 | struct ltt_ust_channel *uchan) |
1685 | { | |
bec39940 | 1686 | struct lttng_ht_iter iter; |
48842b30 DG |
1687 | struct ust_app *app; |
1688 | struct ust_app_session *ua_sess; | |
1689 | struct ust_app_channel *ua_chan; | |
1690 | ||
fc34caaa DG |
1691 | /* Very wrong code flow */ |
1692 | assert(usess); | |
1693 | assert(uchan); | |
421cb601 | 1694 | |
a991f516 MD |
1695 | DBG2("UST app adding channel %s to global domain for session id %d", |
1696 | uchan->name, usess->id); | |
48842b30 DG |
1697 | |
1698 | rcu_read_lock(); | |
421cb601 | 1699 | |
5b4a0ec0 | 1700 | /* For every registered applications */ |
bec39940 | 1701 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
edb67388 DG |
1702 | /* |
1703 | * Create session on the tracer side and add it to app session HT. Note | |
1704 | * that if session exist, it will simply return a pointer to the ust | |
1705 | * app session. | |
1706 | */ | |
421cb601 | 1707 | ua_sess = create_ust_app_session(usess, app); |
509cbaf8 | 1708 | if (ua_sess == NULL) { |
fc34caaa DG |
1709 | /* Major problem here and it's maybe the tracer or malloc() */ |
1710 | goto error; | |
48842b30 DG |
1711 | } |
1712 | ||
421cb601 DG |
1713 | /* Create channel onto application */ |
1714 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1715 | if (ua_chan == NULL) { | |
fc34caaa DG |
1716 | /* Major problem here and it's maybe the tracer or malloc() */ |
1717 | goto error; | |
48842b30 | 1718 | } |
48842b30 | 1719 | } |
5b4a0ec0 | 1720 | |
48842b30 DG |
1721 | rcu_read_unlock(); |
1722 | ||
fc34caaa DG |
1723 | return 0; |
1724 | ||
421cb601 | 1725 | error: |
fc34caaa | 1726 | return -1; |
48842b30 DG |
1727 | } |
1728 | ||
5b4a0ec0 | 1729 | /* |
edb67388 | 1730 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 1731 | */ |
35a9059d | 1732 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1733 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1734 | { | |
1735 | int ret = 0; | |
bec39940 DG |
1736 | struct lttng_ht_iter iter, uiter; |
1737 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
48842b30 DG |
1738 | struct ust_app *app; |
1739 | struct ust_app_session *ua_sess; | |
1740 | struct ust_app_channel *ua_chan; | |
1741 | struct ust_app_event *ua_event; | |
48842b30 | 1742 | |
a991f516 MD |
1743 | DBG("UST app enabling event %s for all apps for session id %d", |
1744 | uevent->attr.name, usess->id); | |
48842b30 | 1745 | |
edb67388 DG |
1746 | /* |
1747 | * NOTE: At this point, this function is called only if the session and | |
1748 | * channel passed are already created for all apps. and enabled on the | |
1749 | * tracer also. | |
1750 | */ | |
1751 | ||
48842b30 | 1752 | rcu_read_lock(); |
421cb601 DG |
1753 | |
1754 | /* For all registered applications */ | |
bec39940 | 1755 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
edb67388 DG |
1756 | ua_sess = lookup_session_by_app(usess, app); |
1757 | /* If ua_sess is NULL, there is a code flow error */ | |
1758 | assert(ua_sess); | |
ba767faf | 1759 | |
edb67388 | 1760 | /* Lookup channel in the ust app session */ |
bec39940 DG |
1761 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1762 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1763 | /* If the channel is not found, there is a code flow error */ |
1764 | assert(ua_chan_node); | |
1765 | ||
1766 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1767 | ||
bec39940 DG |
1768 | lttng_ht_lookup(ua_chan->events, (void*)uevent->attr.name, &uiter); |
1769 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
35a9059d | 1770 | if (ua_event_node == NULL) { |
7f79d3a1 DG |
1771 | DBG3("UST app enable event %s not found for app PID %d." |
1772 | "Skipping app", uevent->attr.name, app->key.pid); | |
35a9059d DG |
1773 | continue; |
1774 | } | |
1775 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1776 | ||
1777 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
1778 | if (ret < 0) { | |
7f79d3a1 | 1779 | goto error; |
48842b30 | 1780 | } |
edb67388 DG |
1781 | } |
1782 | ||
7f79d3a1 | 1783 | error: |
edb67388 | 1784 | rcu_read_unlock(); |
edb67388 DG |
1785 | return ret; |
1786 | } | |
1787 | ||
1788 | /* | |
1789 | * For a specific existing UST session and UST channel, creates the event for | |
1790 | * all registered apps. | |
1791 | */ | |
35a9059d | 1792 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
1793 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1794 | { | |
1795 | int ret = 0; | |
bec39940 DG |
1796 | struct lttng_ht_iter iter, uiter; |
1797 | struct lttng_ht_node_str *ua_chan_node; | |
edb67388 DG |
1798 | struct ust_app *app; |
1799 | struct ust_app_session *ua_sess; | |
1800 | struct ust_app_channel *ua_chan; | |
1801 | ||
a991f516 MD |
1802 | DBG("UST app creating event %s for all apps for session id %d", |
1803 | uevent->attr.name, usess->id); | |
edb67388 | 1804 | |
edb67388 DG |
1805 | rcu_read_lock(); |
1806 | ||
1807 | /* For all registered applications */ | |
bec39940 | 1808 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
edb67388 DG |
1809 | ua_sess = lookup_session_by_app(usess, app); |
1810 | /* If ua_sess is NULL, there is a code flow error */ | |
1811 | assert(ua_sess); | |
48842b30 DG |
1812 | |
1813 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1814 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1815 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1816 | /* If the channel is not found, there is a code flow error */ |
1817 | assert(ua_chan_node); | |
1818 | ||
48842b30 DG |
1819 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1820 | ||
edb67388 DG |
1821 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1822 | if (ret < 0) { | |
fc34caaa DG |
1823 | if (ret != -EEXIST) { |
1824 | /* Possible value at this point: -ENOMEM. If so, we stop! */ | |
1825 | break; | |
1826 | } | |
1827 | DBG2("UST app event %s already exist on app PID %d", | |
1828 | uevent->attr.name, app->key.pid); | |
5b4a0ec0 | 1829 | continue; |
48842b30 | 1830 | } |
48842b30 | 1831 | } |
5b4a0ec0 | 1832 | |
48842b30 DG |
1833 | rcu_read_unlock(); |
1834 | ||
1835 | return ret; | |
1836 | } | |
1837 | ||
5b4a0ec0 DG |
1838 | /* |
1839 | * Start tracing for a specific UST session and app. | |
1840 | */ | |
421cb601 | 1841 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1842 | { |
1843 | int ret = 0; | |
bec39940 | 1844 | struct lttng_ht_iter iter; |
48842b30 DG |
1845 | struct ust_app_session *ua_sess; |
1846 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 1847 | struct ltt_ust_stream *ustream; |
7753dea8 | 1848 | int consumerd_fd; |
48842b30 | 1849 | |
421cb601 | 1850 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 1851 | |
509cbaf8 MD |
1852 | rcu_read_lock(); |
1853 | ||
421cb601 DG |
1854 | ua_sess = lookup_session_by_app(usess, app); |
1855 | if (ua_sess == NULL) { | |
509cbaf8 | 1856 | goto error_rcu_unlock; |
421cb601 | 1857 | } |
48842b30 | 1858 | |
aea829b3 DG |
1859 | /* Upon restart, we skip the setup, already done */ |
1860 | if (ua_sess->started) { | |
8be98f9a | 1861 | goto skip_setup; |
aea829b3 | 1862 | } |
8be98f9a | 1863 | |
421cb601 DG |
1864 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1865 | if (ret < 0) { | |
509cbaf8 | 1866 | goto error_rcu_unlock; |
421cb601 | 1867 | } |
48842b30 | 1868 | |
421cb601 | 1869 | /* For each channel */ |
bec39940 DG |
1870 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
1871 | node.node) { | |
421cb601 DG |
1872 | /* Create all streams */ |
1873 | while (1) { | |
5b4a0ec0 | 1874 | /* Create UST stream */ |
421cb601 DG |
1875 | ustream = zmalloc(sizeof(*ustream)); |
1876 | if (ustream == NULL) { | |
1877 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1878 | goto error_rcu_unlock; |
421cb601 | 1879 | } |
48842b30 | 1880 | |
421cb601 DG |
1881 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
1882 | &ustream->obj); | |
48842b30 | 1883 | if (ret < 0) { |
421cb601 DG |
1884 | /* Got all streams */ |
1885 | break; | |
48842b30 | 1886 | } |
421cb601 | 1887 | ustream->handle = ustream->obj->handle; |
48842b30 | 1888 | |
421cb601 DG |
1889 | /* Order is important */ |
1890 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
477d7741 MD |
1891 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", |
1892 | ua_sess->path, ua_chan->name, | |
1893 | ua_chan->streams.count++); | |
aba8e916 DG |
1894 | if (ret < 0) { |
1895 | PERROR("asprintf UST create stream"); | |
421cb601 | 1896 | continue; |
aba8e916 | 1897 | } |
421cb601 DG |
1898 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1899 | ustream->pathname); | |
1900 | } | |
421cb601 | 1901 | } |
aba8e916 | 1902 | |
7753dea8 MD |
1903 | switch (app->bits_per_long) { |
1904 | case 64: | |
1905 | consumerd_fd = ust_consumerd64_fd; | |
1906 | break; | |
1907 | case 32: | |
1908 | consumerd_fd = ust_consumerd32_fd; | |
1909 | break; | |
1910 | default: | |
1911 | ret = -EINVAL; | |
1912 | goto error_rcu_unlock; | |
1913 | } | |
aea829b3 | 1914 | |
421cb601 | 1915 | /* Setup UST consumer socket and send fds to it */ |
7753dea8 | 1916 | ret = ust_consumer_send_session(consumerd_fd, ua_sess); |
421cb601 | 1917 | if (ret < 0) { |
509cbaf8 | 1918 | goto error_rcu_unlock; |
421cb601 | 1919 | } |
8be98f9a | 1920 | ua_sess->started = 1; |
48842b30 | 1921 | |
8be98f9a | 1922 | skip_setup: |
421cb601 DG |
1923 | /* This start the UST tracing */ |
1924 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
1925 | if (ret < 0) { | |
1926 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 1927 | goto error_rcu_unlock; |
421cb601 | 1928 | } |
5b4a0ec0 | 1929 | |
509cbaf8 | 1930 | rcu_read_unlock(); |
48842b30 | 1931 | |
421cb601 DG |
1932 | /* Quiescent wait after starting trace */ |
1933 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 1934 | |
421cb601 | 1935 | return 0; |
48842b30 | 1936 | |
509cbaf8 MD |
1937 | error_rcu_unlock: |
1938 | rcu_read_unlock(); | |
421cb601 DG |
1939 | return -1; |
1940 | } | |
48842b30 | 1941 | |
8be98f9a MD |
1942 | /* |
1943 | * Stop tracing for a specific UST session and app. | |
1944 | */ | |
1945 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1946 | { | |
1947 | int ret = 0; | |
bec39940 | 1948 | struct lttng_ht_iter iter; |
8be98f9a | 1949 | struct ust_app_session *ua_sess; |
6d3686da | 1950 | struct ust_app_channel *ua_chan; |
8be98f9a MD |
1951 | |
1952 | DBG("Stopping tracing for ust app pid %d", app->key.pid); | |
1953 | ||
1954 | rcu_read_lock(); | |
1955 | ||
1956 | ua_sess = lookup_session_by_app(usess, app); | |
1957 | if (ua_sess == NULL) { | |
1958 | /* Only malloc can failed so something is really wrong */ | |
1959 | goto error_rcu_unlock; | |
1960 | } | |
1961 | ||
9d6c7d3f DG |
1962 | /* This inhibits UST tracing */ |
1963 | ret = ustctl_stop_session(app->key.sock, ua_sess->handle); | |
1964 | if (ret < 0) { | |
1965 | ERR("Error stopping tracing for app pid: %d", app->key.pid); | |
1966 | goto error_rcu_unlock; | |
1967 | } | |
1968 | ||
1969 | /* Quiescent wait after stopping trace */ | |
1970 | ustctl_wait_quiescent(app->key.sock); | |
1971 | ||
1972 | /* Flushing buffers */ | |
bec39940 DG |
1973 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
1974 | node.node) { | |
6d3686da | 1975 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_chan->obj); |
8be98f9a | 1976 | if (ret < 0) { |
6d3686da DG |
1977 | ERR("UST app PID %d channel %s flush failed", |
1978 | app->key.pid, ua_chan->name); | |
1979 | ERR("Ended with ret %d", ret); | |
1980 | /* Continuing flushing all buffers */ | |
1981 | continue; | |
8be98f9a MD |
1982 | } |
1983 | } | |
8be98f9a | 1984 | |
90d97d10 DG |
1985 | /* Flush all buffers before stopping */ |
1986 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_sess->metadata->obj); | |
1987 | if (ret < 0) { | |
1988 | ERR("UST app PID %d metadata flush failed", app->key.pid); | |
1989 | ERR("Ended with ret %d", ret); | |
1990 | } | |
1991 | ||
9d6c7d3f DG |
1992 | rcu_read_unlock(); |
1993 | ||
8be98f9a MD |
1994 | return 0; |
1995 | ||
1996 | error_rcu_unlock: | |
1997 | rcu_read_unlock(); | |
1998 | return -1; | |
1999 | } | |
2000 | ||
84cd17c6 MD |
2001 | /* |
2002 | * Destroy a specific UST session in apps. | |
2003 | */ | |
2004 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2005 | { | |
2006 | struct ust_app_session *ua_sess; | |
2007 | struct lttng_ust_object_data obj; | |
bec39940 DG |
2008 | struct lttng_ht_iter iter; |
2009 | struct lttng_ht_node_ulong *node; | |
525b0740 | 2010 | int ret; |
84cd17c6 MD |
2011 | |
2012 | DBG("Destroy tracing for ust app pid %d", app->key.pid); | |
2013 | ||
2014 | rcu_read_lock(); | |
2015 | ||
2016 | __lookup_session_by_app(usess, app, &iter); | |
bec39940 | 2017 | node = lttng_ht_iter_get_node_ulong(&iter); |
84cd17c6 MD |
2018 | if (node == NULL) { |
2019 | /* Only malloc can failed so something is really wrong */ | |
2020 | goto error_rcu_unlock; | |
2021 | } | |
2022 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
bec39940 | 2023 | ret = lttng_ht_del(app->sessions, &iter); |
525b0740 | 2024 | assert(!ret); |
84cd17c6 MD |
2025 | delete_ust_app_session(app->key.sock, ua_sess); |
2026 | obj.handle = ua_sess->handle; | |
2027 | obj.shm_fd = -1; | |
2028 | obj.wait_fd = -1; | |
2029 | obj.memory_map_size = 0; | |
2030 | ustctl_release_object(app->key.sock, &obj); | |
2031 | ||
2032 | rcu_read_unlock(); | |
2033 | ||
2034 | /* Quiescent wait after stopping trace */ | |
2035 | ustctl_wait_quiescent(app->key.sock); | |
2036 | ||
2037 | return 0; | |
2038 | ||
2039 | error_rcu_unlock: | |
2040 | rcu_read_unlock(); | |
2041 | return -1; | |
2042 | } | |
2043 | ||
5b4a0ec0 DG |
2044 | /* |
2045 | * Start tracing for the UST session. | |
2046 | */ | |
421cb601 DG |
2047 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
2048 | { | |
2049 | int ret = 0; | |
bec39940 | 2050 | struct lttng_ht_iter iter; |
421cb601 | 2051 | struct ust_app *app; |
48842b30 | 2052 | |
421cb601 DG |
2053 | DBG("Starting all UST traces"); |
2054 | ||
2055 | rcu_read_lock(); | |
421cb601 | 2056 | |
bec39940 | 2057 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
421cb601 | 2058 | ret = ust_app_start_trace(usess, app); |
48842b30 | 2059 | if (ret < 0) { |
5b4a0ec0 DG |
2060 | /* Continue to next apps even on error */ |
2061 | continue; | |
48842b30 | 2062 | } |
48842b30 | 2063 | } |
5b4a0ec0 | 2064 | |
48842b30 DG |
2065 | rcu_read_unlock(); |
2066 | ||
2067 | return 0; | |
2068 | } | |
487cf67c | 2069 | |
8be98f9a MD |
2070 | /* |
2071 | * Start tracing for the UST session. | |
2072 | */ | |
2073 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
2074 | { | |
2075 | int ret = 0; | |
bec39940 | 2076 | struct lttng_ht_iter iter; |
8be98f9a MD |
2077 | struct ust_app *app; |
2078 | ||
2079 | DBG("Stopping all UST traces"); | |
2080 | ||
2081 | rcu_read_lock(); | |
2082 | ||
bec39940 | 2083 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
8be98f9a MD |
2084 | ret = ust_app_stop_trace(usess, app); |
2085 | if (ret < 0) { | |
2086 | /* Continue to next apps even on error */ | |
2087 | continue; | |
2088 | } | |
2089 | } | |
2090 | ||
2091 | rcu_read_unlock(); | |
2092 | ||
2093 | return 0; | |
2094 | } | |
2095 | ||
84cd17c6 MD |
2096 | /* |
2097 | * Destroy app UST session. | |
2098 | */ | |
2099 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
2100 | { | |
2101 | int ret = 0; | |
bec39940 | 2102 | struct lttng_ht_iter iter; |
84cd17c6 MD |
2103 | struct ust_app *app; |
2104 | ||
2105 | DBG("Destroy all UST traces"); | |
2106 | ||
2107 | rcu_read_lock(); | |
2108 | ||
bec39940 | 2109 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
84cd17c6 MD |
2110 | ret = ust_app_destroy_trace(usess, app); |
2111 | if (ret < 0) { | |
2112 | /* Continue to next apps even on error */ | |
2113 | continue; | |
2114 | } | |
2115 | } | |
2116 | ||
2117 | rcu_read_unlock(); | |
2118 | ||
2119 | return 0; | |
2120 | } | |
2121 | ||
5b4a0ec0 DG |
2122 | /* |
2123 | * Add channels/events from UST global domain to registered apps at sock. | |
2124 | */ | |
487cf67c DG |
2125 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
2126 | { | |
2127 | int ret = 0; | |
bec39940 | 2128 | struct lttng_ht_iter iter, uiter; |
487cf67c DG |
2129 | struct ust_app *app; |
2130 | struct ust_app_session *ua_sess; | |
2131 | struct ust_app_channel *ua_chan; | |
2132 | struct ust_app_event *ua_event; | |
1f3580c7 DG |
2133 | |
2134 | if (usess == NULL) { | |
5b4a0ec0 | 2135 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
2136 | goto error; |
2137 | } | |
2138 | ||
a991f516 MD |
2139 | DBG2("UST app global update for app sock %d for session id %d", sock, |
2140 | usess->id); | |
487cf67c | 2141 | |
284d8f55 DG |
2142 | rcu_read_lock(); |
2143 | ||
487cf67c DG |
2144 | app = find_app_by_sock(sock); |
2145 | if (app == NULL) { | |
2146 | ERR("Failed to update app sock %d", sock); | |
2147 | goto error; | |
2148 | } | |
2149 | ||
421cb601 | 2150 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 2151 | if (ua_sess == NULL) { |
487cf67c DG |
2152 | goto error; |
2153 | } | |
2154 | ||
284d8f55 DG |
2155 | /* |
2156 | * We can iterate safely here over all UST app session sicne the create ust | |
2157 | * app session above made a shadow copy of the UST global domain from the | |
2158 | * ltt ust session. | |
2159 | */ | |
bec39940 DG |
2160 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2161 | node.node) { | |
284d8f55 DG |
2162 | ret = create_ust_channel(app, ua_sess, ua_chan); |
2163 | if (ret < 0) { | |
2164 | /* FIXME: Should we quit here or continue... */ | |
2165 | continue; | |
487cf67c DG |
2166 | } |
2167 | ||
284d8f55 | 2168 | /* For each events */ |
bec39940 DG |
2169 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
2170 | node.node) { | |
284d8f55 DG |
2171 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
2172 | if (ret < 0) { | |
2173 | /* FIXME: Should we quit here or continue... */ | |
2174 | continue; | |
487cf67c | 2175 | } |
36dc12cc | 2176 | } |
487cf67c DG |
2177 | } |
2178 | ||
36dc12cc | 2179 | if (usess->start_trace) { |
421cb601 | 2180 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 2181 | if (ret < 0) { |
36dc12cc DG |
2182 | goto error; |
2183 | } | |
2184 | ||
36dc12cc DG |
2185 | DBG2("UST trace started for app pid %d", app->key.pid); |
2186 | } | |
2187 | ||
487cf67c DG |
2188 | error: |
2189 | rcu_read_unlock(); | |
2190 | return; | |
2191 | } | |
55cc08a6 DG |
2192 | |
2193 | /* | |
2194 | * Add context to a specific channel for global UST domain. | |
2195 | */ | |
2196 | int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess, | |
2197 | struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx) | |
2198 | { | |
2199 | int ret = 0; | |
bec39940 DG |
2200 | struct lttng_ht_node_str *ua_chan_node; |
2201 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2202 | struct ust_app_channel *ua_chan = NULL; |
2203 | struct ust_app_session *ua_sess; | |
2204 | struct ust_app *app; | |
2205 | ||
2206 | rcu_read_lock(); | |
2207 | ||
bec39940 | 2208 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
55cc08a6 DG |
2209 | ua_sess = lookup_session_by_app(usess, app); |
2210 | if (ua_sess == NULL) { | |
2211 | continue; | |
2212 | } | |
2213 | ||
2214 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2215 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2216 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2217 | if (ua_chan_node == NULL) { |
2218 | continue; | |
2219 | } | |
2220 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2221 | node); | |
2222 | ||
2223 | ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app); | |
2224 | if (ret < 0) { | |
2225 | continue; | |
2226 | } | |
2227 | } | |
2228 | ||
55cc08a6 DG |
2229 | rcu_read_unlock(); |
2230 | return ret; | |
2231 | } | |
2232 | ||
2233 | /* | |
2234 | * Add context to a specific event in a channel for global UST domain. | |
2235 | */ | |
2236 | int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess, | |
2237 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
2238 | struct ltt_ust_context *uctx) | |
2239 | { | |
2240 | int ret = 0; | |
bec39940 DG |
2241 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; |
2242 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2243 | struct ust_app_session *ua_sess; |
2244 | struct ust_app_event *ua_event; | |
2245 | struct ust_app_channel *ua_chan = NULL; | |
2246 | struct ust_app *app; | |
2247 | ||
2248 | rcu_read_lock(); | |
2249 | ||
bec39940 | 2250 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
55cc08a6 DG |
2251 | ua_sess = lookup_session_by_app(usess, app); |
2252 | if (ua_sess == NULL) { | |
2253 | continue; | |
2254 | } | |
2255 | ||
2256 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2257 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2258 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2259 | if (ua_chan_node == NULL) { |
2260 | continue; | |
2261 | } | |
2262 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2263 | node); | |
2264 | ||
bec39940 DG |
2265 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
2266 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2267 | if (ua_event_node == NULL) { |
2268 | continue; | |
2269 | } | |
2270 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, | |
2271 | node); | |
2272 | ||
2273 | ret = create_ust_app_event_context(ua_sess, ua_event, &uctx->ctx, app); | |
2274 | if (ret < 0) { | |
2275 | continue; | |
2276 | } | |
2277 | } | |
2278 | ||
55cc08a6 DG |
2279 | rcu_read_unlock(); |
2280 | return ret; | |
2281 | } | |
76d45b40 DG |
2282 | |
2283 | /* | |
2284 | * Enable event for a channel from a UST session for a specific PID. | |
2285 | */ | |
2286 | int ust_app_enable_event_pid(struct ltt_ust_session *usess, | |
2287 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2288 | { | |
2289 | int ret = 0; | |
bec39940 DG |
2290 | struct lttng_ht_iter iter; |
2291 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
76d45b40 DG |
2292 | struct ust_app *app; |
2293 | struct ust_app_session *ua_sess; | |
2294 | struct ust_app_channel *ua_chan; | |
2295 | struct ust_app_event *ua_event; | |
2296 | ||
2297 | DBG("UST app enabling event %s for PID %d", uevent->attr.name, pid); | |
2298 | ||
2299 | rcu_read_lock(); | |
2300 | ||
2301 | app = ust_app_find_by_pid(pid); | |
2302 | if (app == NULL) { | |
2303 | ERR("UST app enable event per PID %d not found", pid); | |
2304 | ret = -1; | |
2305 | goto error; | |
2306 | } | |
2307 | ||
2308 | ua_sess = lookup_session_by_app(usess, app); | |
2309 | /* If ua_sess is NULL, there is a code flow error */ | |
2310 | assert(ua_sess); | |
2311 | ||
2312 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2313 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2314 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2315 | /* If the channel is not found, there is a code flow error */ |
2316 | assert(ua_chan_node); | |
2317 | ||
2318 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2319 | ||
bec39940 DG |
2320 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2321 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2322 | if (ua_event_node == NULL) { |
2323 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); | |
2324 | if (ret < 0) { | |
2325 | goto error; | |
2326 | } | |
2327 | } else { | |
2328 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2329 | ||
2330 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2331 | if (ret < 0) { | |
2332 | goto error; | |
2333 | } | |
2334 | } | |
2335 | ||
2336 | error: | |
2337 | rcu_read_unlock(); | |
2338 | return ret; | |
2339 | } | |
7f79d3a1 DG |
2340 | |
2341 | /* | |
2342 | * Disable event for a channel from a UST session for a specific PID. | |
2343 | */ | |
2344 | int ust_app_disable_event_pid(struct ltt_ust_session *usess, | |
2345 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2346 | { | |
2347 | int ret = 0; | |
bec39940 DG |
2348 | struct lttng_ht_iter iter; |
2349 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
7f79d3a1 DG |
2350 | struct ust_app *app; |
2351 | struct ust_app_session *ua_sess; | |
2352 | struct ust_app_channel *ua_chan; | |
2353 | struct ust_app_event *ua_event; | |
2354 | ||
2355 | DBG("UST app disabling event %s for PID %d", uevent->attr.name, pid); | |
2356 | ||
2357 | rcu_read_lock(); | |
2358 | ||
2359 | app = ust_app_find_by_pid(pid); | |
2360 | if (app == NULL) { | |
2361 | ERR("UST app disable event per PID %d not found", pid); | |
2362 | ret = -1; | |
2363 | goto error; | |
2364 | } | |
2365 | ||
2366 | ua_sess = lookup_session_by_app(usess, app); | |
2367 | /* If ua_sess is NULL, there is a code flow error */ | |
2368 | assert(ua_sess); | |
2369 | ||
2370 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2371 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2372 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2373 | if (ua_chan_node == NULL) { |
2374 | /* Channel does not exist, skip disabling */ | |
2375 | goto error; | |
2376 | } | |
2377 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2378 | ||
bec39940 DG |
2379 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2380 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2381 | if (ua_event_node == NULL) { |
2382 | /* Event does not exist, skip disabling */ | |
2383 | goto error; | |
2384 | } | |
2385 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2386 | ||
2387 | ret = disable_ust_app_event(ua_sess, ua_event, app); | |
2388 | if (ret < 0) { | |
2389 | goto error; | |
2390 | } | |
2391 | ||
2392 | error: | |
2393 | rcu_read_unlock(); | |
2394 | return ret; | |
2395 | } |