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> |
0df502fd | 28 | #include <urcu/compiler.h> |
bec39940 | 29 | |
10a8a223 DG |
30 | #include <common/lttngerr.h> |
31 | #include <common/lttng-share.h> | |
32 | #include <common/runas.h> | |
1e307fab | 33 | |
56fff090 | 34 | #include "ust-app.h" |
48842b30 | 35 | #include "ust-consumer.h" |
d80a6244 DG |
36 | #include "ust-ctl.h" |
37 | ||
55cc08a6 DG |
38 | /* |
39 | * Delete ust context safely. RCU read lock must be held before calling | |
40 | * this function. | |
41 | */ | |
42 | static | |
43 | void delete_ust_app_ctx(int sock, struct ust_app_ctx *ua_ctx) | |
44 | { | |
45 | if (ua_ctx->obj) { | |
46 | ustctl_release_object(sock, ua_ctx->obj); | |
47 | free(ua_ctx->obj); | |
48 | } | |
49 | free(ua_ctx); | |
50 | } | |
51 | ||
d80a6244 DG |
52 | /* |
53 | * Delete ust app event safely. RCU read lock must be held before calling | |
54 | * this function. | |
55 | */ | |
8b366481 DG |
56 | static |
57 | void delete_ust_app_event(int sock, struct ust_app_event *ua_event) | |
d80a6244 | 58 | { |
55cc08a6 | 59 | int ret; |
bec39940 | 60 | struct lttng_ht_iter iter; |
55cc08a6 DG |
61 | struct ust_app_ctx *ua_ctx; |
62 | ||
fc34caaa | 63 | /* Destroy each context of event */ |
bec39940 DG |
64 | cds_lfht_for_each_entry(ua_event->ctx->ht, &iter.iter, ua_ctx, |
65 | node.node) { | |
66 | ret = lttng_ht_del(ua_event->ctx, &iter); | |
55cc08a6 DG |
67 | assert(!ret); |
68 | delete_ust_app_ctx(sock, ua_ctx); | |
69 | } | |
bec39940 | 70 | lttng_ht_destroy(ua_event->ctx); |
d80a6244 | 71 | |
edb67388 DG |
72 | if (ua_event->obj != NULL) { |
73 | ustctl_release_object(sock, ua_event->obj); | |
74 | free(ua_event->obj); | |
75 | } | |
d80a6244 DG |
76 | free(ua_event); |
77 | } | |
78 | ||
79 | /* | |
80 | * Delete ust app stream safely. RCU read lock must be held before calling | |
81 | * this function. | |
82 | */ | |
8b366481 DG |
83 | static |
84 | void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream) | |
d80a6244 | 85 | { |
8b366481 DG |
86 | if (stream->obj) { |
87 | ustctl_release_object(sock, stream->obj); | |
88 | free(stream->obj); | |
89 | } | |
84cd17c6 | 90 | free(stream); |
d80a6244 DG |
91 | } |
92 | ||
93 | /* | |
94 | * Delete ust app channel safely. RCU read lock must be held before calling | |
95 | * this function. | |
96 | */ | |
8b366481 DG |
97 | static |
98 | void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan) | |
d80a6244 DG |
99 | { |
100 | int ret; | |
bec39940 | 101 | struct lttng_ht_iter iter; |
d80a6244 | 102 | struct ust_app_event *ua_event; |
55cc08a6 | 103 | struct ust_app_ctx *ua_ctx; |
d80a6244 DG |
104 | struct ltt_ust_stream *stream, *stmp; |
105 | ||
55cc08a6 | 106 | /* Wipe stream */ |
d80a6244 | 107 | cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) { |
84cd17c6 | 108 | cds_list_del(&stream->list); |
d80a6244 DG |
109 | delete_ust_app_stream(sock, stream); |
110 | } | |
111 | ||
55cc08a6 | 112 | /* Wipe context */ |
bec39940 DG |
113 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter.iter, ua_ctx, node.node) { |
114 | ret = lttng_ht_del(ua_chan->ctx, &iter); | |
55cc08a6 DG |
115 | assert(!ret); |
116 | delete_ust_app_ctx(sock, ua_ctx); | |
117 | } | |
bec39940 | 118 | lttng_ht_destroy(ua_chan->ctx); |
d80a6244 | 119 | |
55cc08a6 | 120 | /* Wipe events */ |
bec39940 DG |
121 | cds_lfht_for_each_entry(ua_chan->events->ht, &iter.iter, ua_event, |
122 | node.node) { | |
123 | ret = lttng_ht_del(ua_chan->events, &iter); | |
525b0740 | 124 | assert(!ret); |
d80a6244 DG |
125 | delete_ust_app_event(sock, ua_event); |
126 | } | |
bec39940 | 127 | lttng_ht_destroy(ua_chan->events); |
edb67388 DG |
128 | |
129 | if (ua_chan->obj != NULL) { | |
130 | ustctl_release_object(sock, ua_chan->obj); | |
131 | free(ua_chan->obj); | |
132 | } | |
84cd17c6 | 133 | free(ua_chan); |
d80a6244 DG |
134 | } |
135 | ||
136 | /* | |
137 | * Delete ust app session safely. RCU read lock must be held before calling | |
138 | * this function. | |
139 | */ | |
8b366481 DG |
140 | static |
141 | void delete_ust_app_session(int sock, struct ust_app_session *ua_sess) | |
d80a6244 DG |
142 | { |
143 | int ret; | |
bec39940 | 144 | struct lttng_ht_iter iter; |
d80a6244 DG |
145 | struct ust_app_channel *ua_chan; |
146 | ||
147 | if (ua_sess->metadata) { | |
8b366481 DG |
148 | if (ua_sess->metadata->stream_obj) { |
149 | ustctl_release_object(sock, ua_sess->metadata->stream_obj); | |
150 | free(ua_sess->metadata->stream_obj); | |
151 | } | |
152 | if (ua_sess->metadata->obj) { | |
153 | ustctl_release_object(sock, ua_sess->metadata->obj); | |
154 | free(ua_sess->metadata->obj); | |
155 | } | |
d80a6244 DG |
156 | } |
157 | ||
bec39940 DG |
158 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
159 | node.node) { | |
160 | ret = lttng_ht_del(ua_sess->channels, &iter); | |
525b0740 | 161 | assert(!ret); |
d80a6244 DG |
162 | delete_ust_app_channel(sock, ua_chan); |
163 | } | |
bec39940 | 164 | lttng_ht_destroy(ua_sess->channels); |
d80a6244 | 165 | |
aee6bafd MD |
166 | if (ua_sess->handle != -1) { |
167 | ustctl_release_handle(sock, ua_sess->handle); | |
168 | } | |
8b366481 | 169 | free(ua_sess); |
d80a6244 | 170 | } |
91d76f53 DG |
171 | |
172 | /* | |
284d8f55 DG |
173 | * Delete a traceable application structure from the global list. Never call |
174 | * this function outside of a call_rcu call. | |
91d76f53 | 175 | */ |
8b366481 DG |
176 | static |
177 | void delete_ust_app(struct ust_app *app) | |
91d76f53 | 178 | { |
8b366481 | 179 | int ret, sock; |
bec39940 | 180 | struct lttng_ht_iter iter; |
284d8f55 | 181 | struct ust_app_session *ua_sess; |
44d3bd01 | 182 | |
f6a9efaa | 183 | rcu_read_lock(); |
44d3bd01 | 184 | |
d80a6244 | 185 | /* Delete ust app sessions info */ |
6414a713 MD |
186 | sock = app->key.sock; |
187 | app->key.sock = -1; | |
d80a6244 | 188 | |
8b366481 | 189 | /* Wipe sessions */ |
bec39940 DG |
190 | cds_lfht_for_each_entry(app->sessions->ht, &iter.iter, ua_sess, |
191 | node.node) { | |
192 | ret = lttng_ht_del(app->sessions, &iter); | |
525b0740 | 193 | assert(!ret); |
284d8f55 | 194 | delete_ust_app_session(app->key.sock, ua_sess); |
d80a6244 | 195 | } |
bec39940 | 196 | lttng_ht_destroy(app->sessions); |
d80a6244 | 197 | |
6414a713 | 198 | /* |
bec39940 DG |
199 | * Wait until we have removed the key from the sock hash table before |
200 | * closing this socket, otherwise an application could re-use the socket ID | |
201 | * and race with the teardown, using the same hash table entry. | |
6414a713 MD |
202 | */ |
203 | close(sock); | |
d80a6244 | 204 | |
284d8f55 DG |
205 | DBG2("UST app pid %d deleted", app->key.pid); |
206 | free(app); | |
bec39940 | 207 | |
f6a9efaa | 208 | rcu_read_unlock(); |
099e26bd DG |
209 | } |
210 | ||
211 | /* | |
f6a9efaa | 212 | * URCU intermediate call to delete an UST app. |
099e26bd | 213 | */ |
8b366481 DG |
214 | static |
215 | void delete_ust_app_rcu(struct rcu_head *head) | |
099e26bd | 216 | { |
bec39940 DG |
217 | struct lttng_ht_node_ulong *node = |
218 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
219 | struct ust_app *app = |
220 | caa_container_of(node, struct ust_app, node); | |
221 | ||
bec39940 | 222 | DBG3("Call RCU deleting app PID %d", app->key.pid); |
f6a9efaa | 223 | delete_ust_app(app); |
099e26bd DG |
224 | } |
225 | ||
8b366481 DG |
226 | /* |
227 | * Alloc new UST app session. | |
228 | */ | |
229 | static | |
230 | struct ust_app_session *alloc_ust_app_session(void) | |
231 | { | |
232 | struct ust_app_session *ua_sess; | |
233 | ||
234 | /* Init most of the default value by allocating and zeroing */ | |
235 | ua_sess = zmalloc(sizeof(struct ust_app_session)); | |
236 | if (ua_sess == NULL) { | |
237 | PERROR("malloc"); | |
238 | goto error; | |
239 | } | |
240 | ||
241 | ua_sess->handle = -1; | |
bec39940 | 242 | ua_sess->channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
8b366481 DG |
243 | |
244 | return ua_sess; | |
245 | ||
246 | error: | |
247 | return NULL; | |
248 | } | |
249 | ||
250 | /* | |
251 | * Alloc new UST app channel. | |
252 | */ | |
253 | static | |
254 | struct ust_app_channel *alloc_ust_app_channel(char *name, | |
255 | struct lttng_ust_channel *attr) | |
256 | { | |
257 | struct ust_app_channel *ua_chan; | |
258 | ||
259 | /* Init most of the default value by allocating and zeroing */ | |
260 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); | |
261 | if (ua_chan == NULL) { | |
262 | PERROR("malloc"); | |
263 | goto error; | |
264 | } | |
265 | ||
266 | /* Setup channel name */ | |
267 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
268 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
269 | ||
270 | ua_chan->enabled = 1; | |
271 | ua_chan->handle = -1; | |
bec39940 DG |
272 | ua_chan->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
273 | ua_chan->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); | |
274 | lttng_ht_node_init_str(&ua_chan->node, ua_chan->name); | |
8b366481 DG |
275 | |
276 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); | |
277 | ||
278 | /* Copy attributes */ | |
279 | if (attr) { | |
280 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
281 | } | |
282 | ||
283 | DBG3("UST app channel %s allocated", ua_chan->name); | |
284 | ||
285 | return ua_chan; | |
286 | ||
287 | error: | |
288 | return NULL; | |
289 | } | |
290 | ||
291 | /* | |
292 | * Alloc new UST app event. | |
293 | */ | |
294 | static | |
295 | struct ust_app_event *alloc_ust_app_event(char *name, | |
296 | struct lttng_ust_event *attr) | |
297 | { | |
298 | struct ust_app_event *ua_event; | |
299 | ||
300 | /* Init most of the default value by allocating and zeroing */ | |
301 | ua_event = zmalloc(sizeof(struct ust_app_event)); | |
302 | if (ua_event == NULL) { | |
303 | PERROR("malloc"); | |
304 | goto error; | |
305 | } | |
306 | ||
307 | ua_event->enabled = 1; | |
308 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
309 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
bec39940 DG |
310 | ua_event->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
311 | lttng_ht_node_init_str(&ua_event->node, ua_event->name); | |
8b366481 DG |
312 | |
313 | /* Copy attributes */ | |
314 | if (attr) { | |
315 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
316 | } | |
317 | ||
318 | DBG3("UST app event %s allocated", ua_event->name); | |
319 | ||
320 | return ua_event; | |
321 | ||
322 | error: | |
323 | return NULL; | |
324 | } | |
325 | ||
326 | /* | |
327 | * Alloc new UST app context. | |
328 | */ | |
329 | static | |
330 | struct ust_app_ctx *alloc_ust_app_ctx(struct lttng_ust_context *uctx) | |
331 | { | |
332 | struct ust_app_ctx *ua_ctx; | |
333 | ||
334 | ua_ctx = zmalloc(sizeof(struct ust_app_ctx)); | |
335 | if (ua_ctx == NULL) { | |
336 | goto error; | |
337 | } | |
338 | ||
339 | if (uctx) { | |
340 | memcpy(&ua_ctx->ctx, uctx, sizeof(ua_ctx->ctx)); | |
341 | } | |
342 | ||
343 | DBG3("UST app context %d allocated", ua_ctx->ctx.ctx); | |
344 | ||
345 | error: | |
346 | return ua_ctx; | |
347 | } | |
348 | ||
099e26bd | 349 | /* |
421cb601 DG |
350 | * Find an ust_app using the sock and return it. RCU read side lock must be |
351 | * held before calling this helper function. | |
099e26bd | 352 | */ |
8b366481 DG |
353 | static |
354 | struct ust_app *find_app_by_sock(int sock) | |
099e26bd | 355 | { |
bec39940 | 356 | struct lttng_ht_node_ulong *node; |
f6a9efaa | 357 | struct ust_app_key *key; |
bec39940 | 358 | struct lttng_ht_iter iter; |
f6a9efaa | 359 | |
bec39940 DG |
360 | lttng_ht_lookup(ust_app_sock_key_map, (void *)((unsigned long) sock), |
361 | &iter); | |
362 | node = lttng_ht_iter_get_node_ulong(&iter); | |
f6a9efaa DG |
363 | if (node == NULL) { |
364 | DBG2("UST app find by sock %d key not found", sock); | |
f6a9efaa DG |
365 | goto error; |
366 | } | |
f6a9efaa DG |
367 | key = caa_container_of(node, struct ust_app_key, node); |
368 | ||
bec39940 DG |
369 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) key->pid), &iter); |
370 | node = lttng_ht_iter_get_node_ulong(&iter); | |
f6a9efaa DG |
371 | if (node == NULL) { |
372 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
373 | goto error; |
374 | } | |
f6a9efaa DG |
375 | return caa_container_of(node, struct ust_app, node); |
376 | ||
377 | error: | |
378 | return NULL; | |
099e26bd DG |
379 | } |
380 | ||
55cc08a6 DG |
381 | /* |
382 | * Create the channel context on the tracer. | |
383 | */ | |
384 | static | |
385 | int create_ust_channel_context(struct ust_app_channel *ua_chan, | |
386 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
387 | { | |
388 | int ret; | |
389 | ||
390 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
391 | ua_chan->obj, &ua_ctx->obj); | |
392 | if (ret < 0) { | |
393 | goto error; | |
394 | } | |
395 | ||
396 | ua_ctx->handle = ua_ctx->obj->handle; | |
397 | ||
398 | DBG2("UST app context added to channel %s successfully", ua_chan->name); | |
399 | ||
400 | error: | |
401 | return ret; | |
402 | } | |
403 | ||
404 | /* | |
405 | * Create the event context on the tracer. | |
406 | */ | |
407 | static | |
408 | int create_ust_event_context(struct ust_app_event *ua_event, | |
409 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
410 | { | |
411 | int ret; | |
412 | ||
413 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
414 | ua_event->obj, &ua_ctx->obj); | |
415 | if (ret < 0) { | |
416 | goto error; | |
417 | } | |
418 | ||
419 | ua_ctx->handle = ua_ctx->obj->handle; | |
420 | ||
421 | DBG2("UST app context added to event %s successfully", ua_event->name); | |
422 | ||
423 | error: | |
424 | return ret; | |
425 | } | |
426 | ||
9730260e DG |
427 | /* |
428 | * Disable the specified event on to UST tracer for the UST session. | |
429 | */ | |
430 | static int disable_ust_event(struct ust_app *app, | |
431 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
432 | { | |
433 | int ret; | |
434 | ||
435 | ret = ustctl_disable(app->key.sock, ua_event->obj); | |
436 | if (ret < 0) { | |
437 | ERR("UST app event %s disable failed for app (pid: %d) " | |
438 | "and session handle %d with ret %d", | |
439 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
440 | goto error; | |
441 | } | |
442 | ||
443 | DBG2("UST app event %s disabled successfully for app (pid: %d)", | |
444 | ua_event->attr.name, app->key.pid); | |
445 | ||
446 | error: | |
447 | return ret; | |
448 | } | |
449 | ||
78f0bacd DG |
450 | /* |
451 | * Disable the specified channel on to UST tracer for the UST session. | |
452 | */ | |
453 | static int disable_ust_channel(struct ust_app *app, | |
454 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
455 | { | |
456 | int ret; | |
457 | ||
458 | ret = ustctl_disable(app->key.sock, ua_chan->obj); | |
459 | if (ret < 0) { | |
460 | ERR("UST app channel %s disable failed for app (pid: %d) " | |
461 | "and session handle %d with ret %d", | |
462 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
463 | goto error; | |
464 | } | |
465 | ||
78f0bacd DG |
466 | DBG2("UST app channel %s disabled successfully for app (pid: %d)", |
467 | ua_chan->name, app->key.pid); | |
468 | ||
469 | error: | |
470 | return ret; | |
471 | } | |
472 | ||
473 | /* | |
474 | * Enable the specified channel on to UST tracer for the UST session. | |
475 | */ | |
476 | static int enable_ust_channel(struct ust_app *app, | |
477 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
478 | { | |
479 | int ret; | |
480 | ||
481 | ret = ustctl_enable(app->key.sock, ua_chan->obj); | |
482 | if (ret < 0) { | |
483 | ERR("UST app channel %s enable failed for app (pid: %d) " | |
484 | "and session handle %d with ret %d", | |
485 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
486 | goto error; | |
487 | } | |
488 | ||
489 | ua_chan->enabled = 1; | |
490 | ||
491 | DBG2("UST app channel %s enabled successfully for app (pid: %d)", | |
492 | ua_chan->name, app->key.pid); | |
493 | ||
494 | error: | |
495 | return ret; | |
496 | } | |
497 | ||
edb67388 DG |
498 | /* |
499 | * Enable the specified event on to UST tracer for the UST session. | |
500 | */ | |
501 | static int enable_ust_event(struct ust_app *app, | |
502 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
503 | { | |
504 | int ret; | |
505 | ||
506 | ret = ustctl_enable(app->key.sock, ua_event->obj); | |
507 | if (ret < 0) { | |
508 | ERR("UST app event %s enable failed for app (pid: %d) " | |
509 | "and session handle %d with ret %d", | |
510 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
511 | goto error; | |
512 | } | |
513 | ||
514 | DBG2("UST app event %s enabled successfully for app (pid: %d)", | |
515 | ua_event->attr.name, app->key.pid); | |
516 | ||
517 | error: | |
518 | return ret; | |
519 | } | |
520 | ||
099e26bd | 521 | /* |
5b4a0ec0 | 522 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 523 | */ |
5b4a0ec0 DG |
524 | static int open_ust_metadata(struct ust_app *app, |
525 | struct ust_app_session *ua_sess) | |
0177d773 | 526 | { |
5b4a0ec0 DG |
527 | int ret; |
528 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 529 | |
5b4a0ec0 DG |
530 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
531 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
532 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
533 | uattr.switch_timer_interval = | |
534 | ua_sess->metadata->attr.switch_timer_interval; | |
535 | uattr.read_timer_interval = | |
536 | ua_sess->metadata->attr.read_timer_interval; | |
537 | uattr.output = ua_sess->metadata->attr.output; | |
538 | ||
539 | /* UST tracer metadata creation */ | |
540 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
541 | &ua_sess->metadata->obj); | |
542 | if (ret < 0) { | |
fc34caaa DG |
543 | ERR("UST app open metadata failed for app pid:%d with ret %d", |
544 | app->key.pid, ret); | |
f6a9efaa | 545 | goto error; |
0177d773 | 546 | } |
f6a9efaa | 547 | |
6d3686da DG |
548 | ua_sess->metadata->handle = ua_sess->metadata->obj->handle; |
549 | ||
f6a9efaa | 550 | error: |
5b4a0ec0 | 551 | return ret; |
91d76f53 DG |
552 | } |
553 | ||
554 | /* | |
5b4a0ec0 | 555 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 556 | */ |
5b4a0ec0 DG |
557 | static int create_ust_stream(struct ust_app *app, |
558 | struct ust_app_session *ua_sess) | |
91d76f53 | 559 | { |
5b4a0ec0 | 560 | int ret; |
421cb601 | 561 | |
5b4a0ec0 DG |
562 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, |
563 | &ua_sess->metadata->stream_obj); | |
564 | if (ret < 0) { | |
565 | ERR("UST create metadata stream failed"); | |
421cb601 | 566 | goto error; |
91d76f53 | 567 | } |
421cb601 | 568 | |
421cb601 | 569 | error: |
5b4a0ec0 | 570 | return ret; |
91d76f53 DG |
571 | } |
572 | ||
b551a063 | 573 | /* |
5b4a0ec0 | 574 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 575 | */ |
5b4a0ec0 DG |
576 | static int create_ust_channel(struct ust_app *app, |
577 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 578 | { |
5b4a0ec0 | 579 | int ret; |
b551a063 | 580 | |
5b4a0ec0 DG |
581 | /* TODO: remove cast and use lttng-ust-abi.h */ |
582 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
583 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); | |
584 | if (ret < 0) { | |
58f3ca76 | 585 | ERR("Creating channel %s for app (pid: %d, sock: %d) " |
5b4a0ec0 DG |
586 | "and session handle %d with ret %d", |
587 | ua_chan->name, app->key.pid, app->key.sock, | |
588 | ua_sess->handle, ret); | |
b551a063 DG |
589 | goto error; |
590 | } | |
591 | ||
5b4a0ec0 | 592 | ua_chan->handle = ua_chan->obj->handle; |
b551a063 | 593 | |
5b4a0ec0 DG |
594 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
595 | ua_chan->name, app->key.pid, app->key.sock); | |
b551a063 | 596 | |
8535a6d9 DG |
597 | /* If channel is not enabled, disable it on the tracer */ |
598 | if (!ua_chan->enabled) { | |
599 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
600 | if (ret < 0) { | |
601 | goto error; | |
602 | } | |
603 | } | |
604 | ||
b551a063 DG |
605 | error: |
606 | return ret; | |
607 | } | |
608 | ||
91d76f53 | 609 | /* |
5b4a0ec0 | 610 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 611 | */ |
edb67388 DG |
612 | static |
613 | int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess, | |
614 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event) | |
91d76f53 | 615 | { |
5b4a0ec0 | 616 | int ret = 0; |
284d8f55 | 617 | |
5b4a0ec0 DG |
618 | /* Create UST event on tracer */ |
619 | ret = ustctl_create_event(app->key.sock, &ua_event->attr, ua_chan->obj, | |
620 | &ua_event->obj); | |
621 | if (ret < 0) { | |
fc34caaa DG |
622 | if (ret == -EEXIST) { |
623 | ret = 0; | |
624 | goto error; | |
625 | } | |
5b4a0ec0 DG |
626 | ERR("Error ustctl create event %s for app pid: %d with ret %d", |
627 | ua_event->attr.name, app->key.pid, ret); | |
628 | goto error; | |
91d76f53 | 629 | } |
f6a9efaa | 630 | |
5b4a0ec0 | 631 | ua_event->handle = ua_event->obj->handle; |
284d8f55 | 632 | |
5b4a0ec0 DG |
633 | DBG2("UST app event %s created successfully for pid:%d", |
634 | ua_event->attr.name, app->key.pid); | |
f6a9efaa | 635 | |
8535a6d9 | 636 | /* If event not enabled, disable it on the tracer */ |
fc34caaa | 637 | if (ua_event->enabled == 0) { |
8535a6d9 DG |
638 | ret = disable_ust_event(app, ua_sess, ua_event); |
639 | if (ret < 0) { | |
fc34caaa DG |
640 | /* |
641 | * If we hit an EPERM, something is wrong with our disable call. If | |
642 | * we get an EEXIST, there is a problem on the tracer side since we | |
643 | * just created it. | |
644 | */ | |
645 | switch (ret) { | |
646 | case -EPERM: | |
647 | /* Code flow problem */ | |
648 | assert(0); | |
649 | case -EEXIST: | |
650 | /* It's OK for our use case. */ | |
651 | ret = 0; | |
652 | break; | |
653 | default: | |
654 | break; | |
655 | } | |
8535a6d9 DG |
656 | goto error; |
657 | } | |
658 | } | |
659 | ||
5b4a0ec0 DG |
660 | error: |
661 | return ret; | |
91d76f53 | 662 | } |
48842b30 | 663 | |
5b4a0ec0 DG |
664 | /* |
665 | * Copy data between an UST app event and a LTT event. | |
666 | */ | |
421cb601 | 667 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
668 | struct ltt_ust_event *uevent) |
669 | { | |
bec39940 | 670 | struct lttng_ht_iter iter; |
55cc08a6 DG |
671 | struct ltt_ust_context *uctx; |
672 | struct ust_app_ctx *ua_ctx; | |
673 | ||
48842b30 DG |
674 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); |
675 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
676 | ||
fc34caaa DG |
677 | ua_event->enabled = uevent->enabled; |
678 | ||
5b4a0ec0 DG |
679 | /* Copy event attributes */ |
680 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
681 | ||
bec39940 | 682 | cds_lfht_for_each_entry(uevent->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
683 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
684 | if (ua_ctx == NULL) { | |
fc34caaa DG |
685 | /* malloc() failed. We should simply stop */ |
686 | return; | |
55cc08a6 | 687 | } |
fc34caaa | 688 | |
bec39940 DG |
689 | lttng_ht_node_init_ulong(&ua_ctx->node, |
690 | (unsigned long) ua_ctx->ctx.ctx); | |
691 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 | 692 | } |
48842b30 DG |
693 | } |
694 | ||
5b4a0ec0 DG |
695 | /* |
696 | * Copy data between an UST app channel and a LTT channel. | |
697 | */ | |
421cb601 | 698 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
699 | struct ltt_ust_channel *uchan) |
700 | { | |
bec39940 DG |
701 | struct lttng_ht_iter iter; |
702 | struct lttng_ht_node_str *ua_event_node; | |
48842b30 | 703 | struct ltt_ust_event *uevent; |
55cc08a6 | 704 | struct ltt_ust_context *uctx; |
48842b30 | 705 | struct ust_app_event *ua_event; |
55cc08a6 | 706 | struct ust_app_ctx *ua_ctx; |
48842b30 | 707 | |
fc34caaa | 708 | DBG2("UST app shadow copy of channel %s started", ua_chan->name); |
48842b30 DG |
709 | |
710 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
711 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
712 | /* Copy event attributes */ |
713 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 | 714 | |
fc34caaa DG |
715 | ua_chan->enabled = uchan->enabled; |
716 | ||
bec39940 | 717 | cds_lfht_for_each_entry(uchan->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
718 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
719 | if (ua_ctx == NULL) { | |
720 | continue; | |
721 | } | |
bec39940 DG |
722 | lttng_ht_node_init_ulong(&ua_ctx->node, |
723 | (unsigned long) ua_ctx->ctx.ctx); | |
724 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 | 725 | } |
48842b30 | 726 | |
421cb601 | 727 | /* Copy all events from ltt ust channel to ust app channel */ |
bec39940 DG |
728 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
729 | struct lttng_ht_iter uiter; | |
ba767faf | 730 | |
bec39940 DG |
731 | lttng_ht_lookup(ua_chan->events, (void *) uevent->attr.name, &uiter); |
732 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
48842b30 | 733 | if (ua_event_node == NULL) { |
421cb601 | 734 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 735 | uevent->attr.name); |
284d8f55 | 736 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 737 | if (ua_event == NULL) { |
5b4a0ec0 | 738 | continue; |
48842b30 | 739 | } |
421cb601 | 740 | shadow_copy_event(ua_event, uevent); |
bec39940 | 741 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
48842b30 | 742 | } |
48842b30 DG |
743 | } |
744 | ||
fc34caaa | 745 | DBG3("UST app shadow copy of channel %s done", ua_chan->name); |
48842b30 DG |
746 | } |
747 | ||
5b4a0ec0 DG |
748 | /* |
749 | * Copy data between a UST app session and a regular LTT session. | |
750 | */ | |
421cb601 | 751 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
bec39940 | 752 | struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 | 753 | { |
bec39940 DG |
754 | struct lttng_ht_node_str *ua_chan_node; |
755 | struct lttng_ht_iter iter; | |
48842b30 DG |
756 | struct ltt_ust_channel *uchan; |
757 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
758 | time_t rawtime; |
759 | struct tm *timeinfo; | |
760 | char datetime[16]; | |
761 | int ret; | |
762 | ||
763 | /* Get date and time for unique app path */ | |
764 | time(&rawtime); | |
765 | timeinfo = localtime(&rawtime); | |
766 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 767 | |
421cb601 | 768 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 | 769 | |
a991f516 | 770 | ua_sess->id = usess->id; |
6df2e2c9 MD |
771 | ua_sess->uid = usess->uid; |
772 | ua_sess->gid = usess->gid; | |
48842b30 | 773 | |
fc34caaa DG |
774 | ret = snprintf(ua_sess->path, PATH_MAX, "%s/%s-%d-%s", usess->pathname, |
775 | app->name, app->key.pid, datetime); | |
477d7741 MD |
776 | if (ret < 0) { |
777 | PERROR("asprintf UST shadow copy session"); | |
778 | /* TODO: We cannot return an error from here.. */ | |
779 | assert(0); | |
780 | } | |
781 | ||
48842b30 DG |
782 | /* TODO: support all UST domain */ |
783 | ||
784 | /* Iterate over all channels in global domain. */ | |
bec39940 DG |
785 | cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter, |
786 | uchan, node.node) { | |
787 | struct lttng_ht_iter uiter; | |
ba767faf | 788 | |
bec39940 DG |
789 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
790 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
5b4a0ec0 | 791 | if (ua_chan_node != NULL) { |
fc34caaa | 792 | /* Session exist. Contiuing. */ |
5b4a0ec0 DG |
793 | continue; |
794 | } | |
421cb601 | 795 | |
5b4a0ec0 DG |
796 | DBG2("Channel %s not found on shadow session copy, creating it", |
797 | uchan->name); | |
798 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
799 | if (ua_chan == NULL) { | |
fc34caaa | 800 | /* malloc failed FIXME: Might want to do handle ENOMEM .. */ |
5b4a0ec0 | 801 | continue; |
48842b30 DG |
802 | } |
803 | ||
5b4a0ec0 | 804 | shadow_copy_channel(ua_chan, uchan); |
bec39940 | 805 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
48842b30 DG |
806 | } |
807 | } | |
808 | ||
78f0bacd DG |
809 | /* |
810 | * Lookup sesison wrapper. | |
811 | */ | |
84cd17c6 MD |
812 | static |
813 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
bec39940 | 814 | struct ust_app *app, struct lttng_ht_iter *iter) |
84cd17c6 MD |
815 | { |
816 | /* Get right UST app session from app */ | |
2c348c10 | 817 | lttng_ht_lookup(app->sessions, (void *)((unsigned long) usess->id), iter); |
84cd17c6 MD |
818 | } |
819 | ||
421cb601 DG |
820 | /* |
821 | * Return ust app session from the app session hashtable using the UST session | |
a991f516 | 822 | * id. |
421cb601 | 823 | */ |
48842b30 DG |
824 | static struct ust_app_session *lookup_session_by_app( |
825 | struct ltt_ust_session *usess, struct ust_app *app) | |
826 | { | |
bec39940 DG |
827 | struct lttng_ht_iter iter; |
828 | struct lttng_ht_node_ulong *node; | |
48842b30 | 829 | |
84cd17c6 | 830 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 831 | node = lttng_ht_iter_get_node_ulong(&iter); |
48842b30 DG |
832 | if (node == NULL) { |
833 | goto error; | |
834 | } | |
835 | ||
836 | return caa_container_of(node, struct ust_app_session, node); | |
837 | ||
838 | error: | |
839 | return NULL; | |
840 | } | |
841 | ||
421cb601 DG |
842 | /* |
843 | * Create a UST session onto the tracer of app and add it the session | |
844 | * hashtable. | |
845 | * | |
846 | * Return ust app session or NULL on error. | |
847 | */ | |
848 | static struct ust_app_session *create_ust_app_session( | |
849 | struct ltt_ust_session *usess, struct ust_app *app) | |
850 | { | |
851 | int ret; | |
852 | struct ust_app_session *ua_sess; | |
853 | ||
854 | ua_sess = lookup_session_by_app(usess, app); | |
855 | if (ua_sess == NULL) { | |
a991f516 MD |
856 | DBG2("UST app pid: %d session id %d not found, creating it", |
857 | app->key.pid, usess->id); | |
421cb601 DG |
858 | ua_sess = alloc_ust_app_session(); |
859 | if (ua_sess == NULL) { | |
860 | /* Only malloc can failed so something is really wrong */ | |
fc34caaa | 861 | goto end; |
421cb601 | 862 | } |
477d7741 | 863 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
864 | } |
865 | ||
866 | if (ua_sess->handle == -1) { | |
867 | ret = ustctl_create_session(app->key.sock); | |
868 | if (ret < 0) { | |
fc34caaa | 869 | ERR("Creating session for app pid %d", app->key.pid); |
421cb601 DG |
870 | goto error; |
871 | } | |
872 | ||
421cb601 DG |
873 | ua_sess->handle = ret; |
874 | ||
875 | /* Add ust app session to app's HT */ | |
2c348c10 | 876 | lttng_ht_node_init_ulong(&ua_sess->node, (unsigned long) ua_sess->id); |
bec39940 | 877 | lttng_ht_add_unique_ulong(app->sessions, &ua_sess->node); |
421cb601 DG |
878 | |
879 | DBG2("UST app session created successfully with handle %d", ret); | |
880 | } | |
881 | ||
fc34caaa | 882 | end: |
421cb601 DG |
883 | return ua_sess; |
884 | ||
885 | error: | |
fc34caaa | 886 | delete_ust_app_session(-1, ua_sess); |
421cb601 DG |
887 | return NULL; |
888 | } | |
889 | ||
55cc08a6 DG |
890 | /* |
891 | * Create a context for the channel on the tracer. | |
892 | */ | |
893 | static | |
894 | int create_ust_app_channel_context(struct ust_app_session *ua_sess, | |
895 | struct ust_app_channel *ua_chan, struct lttng_ust_context *uctx, | |
896 | struct ust_app *app) | |
897 | { | |
898 | int ret = 0; | |
bec39940 DG |
899 | struct lttng_ht_iter iter; |
900 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
901 | struct ust_app_ctx *ua_ctx; |
902 | ||
903 | DBG2("UST app adding context to channel %s", ua_chan->name); | |
904 | ||
bec39940 DG |
905 | lttng_ht_lookup(ua_chan->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
906 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
907 | if (node != NULL) { |
908 | ret = -EEXIST; | |
909 | goto error; | |
910 | } | |
911 | ||
912 | ua_ctx = alloc_ust_app_ctx(uctx); | |
913 | if (ua_ctx == NULL) { | |
914 | /* malloc failed */ | |
915 | ret = -1; | |
916 | goto error; | |
917 | } | |
918 | ||
bec39940 DG |
919 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
920 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 DG |
921 | |
922 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
923 | if (ret < 0) { | |
924 | goto error; | |
925 | } | |
926 | ||
927 | error: | |
928 | return ret; | |
929 | } | |
930 | ||
931 | /* | |
932 | * Create an UST context and enable it for the event on the tracer. | |
933 | */ | |
934 | static | |
935 | int create_ust_app_event_context(struct ust_app_session *ua_sess, | |
936 | struct ust_app_event *ua_event, struct lttng_ust_context *uctx, | |
937 | struct ust_app *app) | |
938 | { | |
939 | int ret = 0; | |
bec39940 DG |
940 | struct lttng_ht_iter iter; |
941 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
942 | struct ust_app_ctx *ua_ctx; |
943 | ||
944 | DBG2("UST app adding context to event %s", ua_event->name); | |
945 | ||
bec39940 DG |
946 | lttng_ht_lookup(ua_event->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
947 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
948 | if (node != NULL) { |
949 | ret = -EEXIST; | |
950 | goto error; | |
951 | } | |
952 | ||
953 | ua_ctx = alloc_ust_app_ctx(uctx); | |
954 | if (ua_ctx == NULL) { | |
955 | /* malloc failed */ | |
956 | ret = -1; | |
957 | goto error; | |
958 | } | |
959 | ||
bec39940 DG |
960 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
961 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 DG |
962 | |
963 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
964 | if (ret < 0) { | |
965 | goto error; | |
966 | } | |
967 | ||
968 | error: | |
969 | return ret; | |
970 | } | |
971 | ||
edb67388 DG |
972 | /* |
973 | * Enable on the tracer side a ust app event for the session and channel. | |
974 | */ | |
975 | static | |
976 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 977 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
978 | { |
979 | int ret; | |
980 | ||
981 | ret = enable_ust_event(app, ua_sess, ua_event); | |
982 | if (ret < 0) { | |
983 | goto error; | |
984 | } | |
985 | ||
986 | ua_event->enabled = 1; | |
987 | ||
988 | error: | |
989 | return ret; | |
990 | } | |
991 | ||
9730260e DG |
992 | /* |
993 | * Disable on the tracer side a ust app event for the session and channel. | |
994 | */ | |
995 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
7f79d3a1 | 996 | struct ust_app_event *ua_event, struct ust_app *app) |
9730260e DG |
997 | { |
998 | int ret; | |
999 | ||
1000 | ret = disable_ust_event(app, ua_sess, ua_event); | |
1001 | if (ret < 0) { | |
1002 | goto error; | |
1003 | } | |
1004 | ||
1005 | ua_event->enabled = 0; | |
1006 | ||
1007 | error: | |
1008 | return ret; | |
1009 | } | |
1010 | ||
78f0bacd DG |
1011 | /* |
1012 | * Lookup ust app channel for session and disable it on the tracer side. | |
1013 | */ | |
8535a6d9 DG |
1014 | static |
1015 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
1016 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 1017 | { |
8535a6d9 | 1018 | int ret; |
78f0bacd DG |
1019 | |
1020 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
1021 | if (ret < 0) { | |
1022 | goto error; | |
1023 | } | |
1024 | ||
8535a6d9 DG |
1025 | ua_chan->enabled = 0; |
1026 | ||
78f0bacd DG |
1027 | error: |
1028 | return ret; | |
1029 | } | |
1030 | ||
1031 | /* | |
1032 | * Lookup ust app channel for session and enable it on the tracer side. | |
1033 | */ | |
1034 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
1035 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
1036 | { | |
1037 | int ret = 0; | |
bec39940 DG |
1038 | struct lttng_ht_iter iter; |
1039 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1040 | struct ust_app_channel *ua_chan; |
1041 | ||
bec39940 DG |
1042 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1043 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
78f0bacd | 1044 | if (ua_chan_node == NULL) { |
a991f516 MD |
1045 | DBG2("Unable to find channel %s in ust session id %u", |
1046 | uchan->name, ua_sess->id); | |
78f0bacd DG |
1047 | goto error; |
1048 | } | |
1049 | ||
1050 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1051 | ||
1052 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
1053 | if (ret < 0) { | |
1054 | goto error; | |
1055 | } | |
1056 | ||
1057 | error: | |
1058 | return ret; | |
1059 | } | |
1060 | ||
284d8f55 | 1061 | /* |
5b4a0ec0 | 1062 | * Create UST app channel and create it on the tracer. |
284d8f55 | 1063 | */ |
5b4a0ec0 DG |
1064 | static struct ust_app_channel *create_ust_app_channel( |
1065 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
1066 | struct ust_app *app) | |
1067 | { | |
1068 | int ret = 0; | |
bec39940 DG |
1069 | struct lttng_ht_iter iter; |
1070 | struct lttng_ht_node_str *ua_chan_node; | |
5b4a0ec0 DG |
1071 | struct ust_app_channel *ua_chan; |
1072 | ||
1073 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1074 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1075 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
fc34caaa | 1076 | if (ua_chan_node != NULL) { |
5b4a0ec0 | 1077 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
fc34caaa | 1078 | goto end; |
5b4a0ec0 DG |
1079 | } |
1080 | ||
fc34caaa DG |
1081 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); |
1082 | if (ua_chan == NULL) { | |
1083 | /* Only malloc can fail here */ | |
1084 | goto error; | |
1085 | } | |
1086 | shadow_copy_channel(ua_chan, uchan); | |
1087 | ||
5b4a0ec0 DG |
1088 | ret = create_ust_channel(app, ua_sess, ua_chan); |
1089 | if (ret < 0) { | |
fc34caaa DG |
1090 | /* Not found previously means that it does not exist on the tracer */ |
1091 | assert(ret != -EEXIST); | |
5b4a0ec0 DG |
1092 | goto error; |
1093 | } | |
1094 | ||
58f3ca76 DG |
1095 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
1096 | ||
fc34caaa DG |
1097 | DBG2("UST app create channel %s for PID %d completed", ua_chan->name, |
1098 | app->key.pid); | |
1099 | ||
1100 | end: | |
5b4a0ec0 DG |
1101 | return ua_chan; |
1102 | ||
1103 | error: | |
fc34caaa | 1104 | delete_ust_app_channel(-1, ua_chan); |
5b4a0ec0 DG |
1105 | return NULL; |
1106 | } | |
1107 | ||
1108 | /* | |
1109 | * Create UST app event and create it on the tracer side. | |
1110 | */ | |
edb67388 DG |
1111 | static |
1112 | int create_ust_app_event(struct ust_app_session *ua_sess, | |
1113 | struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent, | |
1114 | struct ust_app *app) | |
284d8f55 | 1115 | { |
edb67388 | 1116 | int ret = 0; |
bec39940 DG |
1117 | struct lttng_ht_iter iter; |
1118 | struct lttng_ht_node_str *ua_event_node; | |
5b4a0ec0 | 1119 | struct ust_app_event *ua_event; |
284d8f55 | 1120 | |
5b4a0ec0 | 1121 | /* Get event node */ |
bec39940 DG |
1122 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
1123 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
edb67388 | 1124 | if (ua_event_node != NULL) { |
fc34caaa | 1125 | ret = -EEXIST; |
edb67388 DG |
1126 | goto end; |
1127 | } | |
5b4a0ec0 | 1128 | |
edb67388 DG |
1129 | /* Does not exist so create one */ |
1130 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
1131 | if (ua_event == NULL) { | |
1132 | /* Only malloc can failed so something is really wrong */ | |
1133 | ret = -ENOMEM; | |
fc34caaa | 1134 | goto end; |
5b4a0ec0 | 1135 | } |
edb67388 | 1136 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 1137 | |
edb67388 | 1138 | /* Create it on the tracer side */ |
5b4a0ec0 | 1139 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 1140 | if (ret < 0) { |
fc34caaa DG |
1141 | /* Not found previously means that it does not exist on the tracer */ |
1142 | assert(ret != -EEXIST); | |
284d8f55 DG |
1143 | goto error; |
1144 | } | |
1145 | ||
bec39940 | 1146 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
284d8f55 | 1147 | |
fc34caaa DG |
1148 | DBG2("UST app create event %s for PID %d completed", ua_event->name, |
1149 | app->key.pid); | |
7f79d3a1 | 1150 | |
edb67388 | 1151 | end: |
fc34caaa DG |
1152 | return ret; |
1153 | ||
5b4a0ec0 | 1154 | error: |
fc34caaa DG |
1155 | /* Valid. Calling here is already in a read side lock */ |
1156 | delete_ust_app_event(-1, ua_event); | |
edb67388 | 1157 | return ret; |
5b4a0ec0 DG |
1158 | } |
1159 | ||
1160 | /* | |
1161 | * Create UST metadata and open it on the tracer side. | |
1162 | */ | |
1163 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
1164 | char *pathname, struct ust_app *app) | |
1165 | { | |
1166 | int ret = 0; | |
1167 | ||
1168 | if (ua_sess->metadata == NULL) { | |
1169 | /* Allocate UST metadata */ | |
1170 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
1171 | if (ua_sess->metadata == NULL) { | |
fc34caaa | 1172 | /* malloc() failed */ |
5b4a0ec0 DG |
1173 | goto error; |
1174 | } | |
1175 | ||
1176 | ret = open_ust_metadata(app, ua_sess); | |
1177 | if (ret < 0) { | |
7db205b5 DG |
1178 | DBG3("Opening metadata failed. Cleaning up memory"); |
1179 | ||
fc34caaa DG |
1180 | /* Cleanup failed metadata struct */ |
1181 | free(ua_sess->metadata); | |
7db205b5 DG |
1182 | /* |
1183 | * This is very important because delete_ust_app_session check if | |
1184 | * the pointer is null or not in order to delete the metadata. | |
1185 | */ | |
1186 | ua_sess->metadata = NULL; | |
5b4a0ec0 DG |
1187 | goto error; |
1188 | } | |
1189 | ||
1190 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
1191 | } | |
1192 | ||
1193 | /* Open UST metadata stream */ | |
1194 | if (ua_sess->metadata->stream_obj == NULL) { | |
1195 | ret = create_ust_stream(app, ua_sess); | |
1196 | if (ret < 0) { | |
1197 | goto error; | |
1198 | } | |
1199 | ||
e11d277b | 1200 | ret = run_as_mkdir(ua_sess->path, S_IRWXU | S_IRWXG, |
67f747d8 | 1201 | ua_sess->uid, ua_sess->gid); |
5b4a0ec0 DG |
1202 | if (ret < 0) { |
1203 | PERROR("mkdir UST metadata"); | |
1204 | goto error; | |
1205 | } | |
1206 | ||
477d7741 MD |
1207 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
1208 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
1209 | if (ret < 0) { |
1210 | PERROR("asprintf UST create stream"); | |
1211 | goto error; | |
1212 | } | |
1213 | ||
1214 | DBG2("UST metadata stream object created for app pid %d", | |
1215 | app->key.pid); | |
1216 | } else { | |
1217 | ERR("Attempting to create stream without metadata opened"); | |
1218 | goto error; | |
1219 | } | |
1220 | ||
1221 | return 0; | |
1222 | ||
1223 | error: | |
1224 | return -1; | |
1225 | } | |
1226 | ||
1227 | /* | |
1228 | * Return pointer to traceable apps list. | |
1229 | */ | |
bec39940 | 1230 | struct lttng_ht *ust_app_get_ht(void) |
5b4a0ec0 DG |
1231 | { |
1232 | return ust_app_ht; | |
1233 | } | |
1234 | ||
1235 | /* | |
1236 | * Return ust app pointer or NULL if not found. | |
1237 | */ | |
1238 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
1239 | { | |
bec39940 DG |
1240 | struct lttng_ht_node_ulong *node; |
1241 | struct lttng_ht_iter iter; | |
5b4a0ec0 DG |
1242 | |
1243 | rcu_read_lock(); | |
bec39940 DG |
1244 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) pid), &iter); |
1245 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1246 | if (node == NULL) { |
1247 | DBG2("UST app no found with pid %d", pid); | |
1248 | goto error; | |
1249 | } | |
1250 | rcu_read_unlock(); | |
1251 | ||
1252 | DBG2("Found UST app by pid %d", pid); | |
1253 | ||
1254 | return caa_container_of(node, struct ust_app, node); | |
1255 | ||
1256 | error: | |
1257 | rcu_read_unlock(); | |
1258 | return NULL; | |
1259 | } | |
1260 | ||
1261 | /* | |
1262 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
1263 | * add it to the global traceable app list. | |
1264 | * | |
0df502fd MD |
1265 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
1266 | * bitness is not supported. | |
5b4a0ec0 DG |
1267 | */ |
1268 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
1269 | { | |
1270 | struct ust_app *lta; | |
1271 | ||
7753dea8 MD |
1272 | if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL) |
1273 | || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) { | |
f943b0fb | 1274 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1275 | "%d-bit long, but no consumerd for this long size is available.\n", |
1276 | msg->name, msg->pid, msg->bits_per_long); | |
88ff5b7f | 1277 | close(sock); |
0df502fd MD |
1278 | return -EINVAL; |
1279 | } | |
5b4a0ec0 DG |
1280 | lta = zmalloc(sizeof(struct ust_app)); |
1281 | if (lta == NULL) { | |
1282 | PERROR("malloc"); | |
1283 | return -ENOMEM; | |
1284 | } | |
1285 | ||
1286 | lta->ppid = msg->ppid; | |
1287 | lta->uid = msg->uid; | |
1288 | lta->gid = msg->gid; | |
7753dea8 | 1289 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1290 | lta->v_major = msg->major; |
1291 | lta->v_minor = msg->minor; | |
1292 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1293 | lta->name[16] = '\0'; | |
bec39940 | 1294 | lta->sessions = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
5b4a0ec0 DG |
1295 | |
1296 | /* Set key map */ | |
1297 | lta->key.pid = msg->pid; | |
bec39940 | 1298 | lttng_ht_node_init_ulong(<a->node, (unsigned long)lta->key.pid); |
5b4a0ec0 | 1299 | lta->key.sock = sock; |
bec39940 | 1300 | lttng_ht_node_init_ulong(<a->key.node, (unsigned long)lta->key.sock); |
5b4a0ec0 DG |
1301 | |
1302 | rcu_read_lock(); | |
bec39940 DG |
1303 | lttng_ht_add_unique_ulong(ust_app_sock_key_map, <a->key.node); |
1304 | lttng_ht_add_unique_ulong(ust_app_ht, <a->node); | |
5b4a0ec0 DG |
1305 | rcu_read_unlock(); |
1306 | ||
1307 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
1308 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, | |
1309 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
1310 | ||
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | /* | |
1315 | * Unregister app by removing it from the global traceable app list and freeing | |
1316 | * the data struct. | |
1317 | * | |
1318 | * The socket is already closed at this point so no close to sock. | |
1319 | */ | |
1320 | void ust_app_unregister(int sock) | |
1321 | { | |
1322 | struct ust_app *lta; | |
bec39940 DG |
1323 | struct lttng_ht_node_ulong *node; |
1324 | struct lttng_ht_iter iter; | |
525b0740 | 1325 | int ret; |
5b4a0ec0 DG |
1326 | |
1327 | rcu_read_lock(); | |
1328 | lta = find_app_by_sock(sock); | |
1329 | if (lta == NULL) { | |
1330 | ERR("Unregister app sock %d not found!", sock); | |
1331 | goto error; | |
1332 | } | |
1333 | ||
1334 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
1335 | ||
886459c6 MD |
1336 | /* Remove application from socket hash table */ |
1337 | lttng_ht_lookup(ust_app_sock_key_map, (void *)((unsigned long) sock), &iter); | |
1338 | ret = lttng_ht_del(ust_app_sock_key_map, &iter); | |
1339 | assert(!ret); | |
1340 | ||
5b4a0ec0 | 1341 | /* Get the node reference for a call_rcu */ |
bec39940 DG |
1342 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) lta->key.pid), &iter); |
1343 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1344 | if (node == NULL) { |
1345 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
1346 | goto error; | |
1347 | } | |
284d8f55 | 1348 | |
886459c6 | 1349 | /* Remove application from PID hash table */ |
bec39940 | 1350 | ret = lttng_ht_del(ust_app_ht, &iter); |
525b0740 | 1351 | assert(!ret); |
5b4a0ec0 | 1352 | call_rcu(&node->head, delete_ust_app_rcu); |
284d8f55 | 1353 | error: |
5b4a0ec0 DG |
1354 | rcu_read_unlock(); |
1355 | return; | |
284d8f55 DG |
1356 | } |
1357 | ||
1358 | /* | |
5b4a0ec0 | 1359 | * Return traceable_app_count |
284d8f55 | 1360 | */ |
5b4a0ec0 | 1361 | unsigned long ust_app_list_count(void) |
284d8f55 | 1362 | { |
5b4a0ec0 | 1363 | unsigned long count; |
284d8f55 | 1364 | |
5b4a0ec0 | 1365 | rcu_read_lock(); |
bec39940 | 1366 | count = lttng_ht_get_count(ust_app_ht); |
5b4a0ec0 | 1367 | rcu_read_unlock(); |
284d8f55 | 1368 | |
5b4a0ec0 | 1369 | return count; |
284d8f55 DG |
1370 | } |
1371 | ||
5b4a0ec0 DG |
1372 | /* |
1373 | * Fill events array with all events name of all registered apps. | |
1374 | */ | |
1375 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1376 | { |
5b4a0ec0 DG |
1377 | int ret, handle; |
1378 | size_t nbmem, count = 0; | |
bec39940 | 1379 | struct lttng_ht_iter iter; |
5b4a0ec0 DG |
1380 | struct ust_app *app; |
1381 | struct lttng_event *tmp; | |
421cb601 | 1382 | |
5b4a0ec0 DG |
1383 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1384 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1385 | if (tmp == NULL) { | |
1386 | PERROR("zmalloc ust app events"); | |
1387 | ret = -ENOMEM; | |
421cb601 DG |
1388 | goto error; |
1389 | } | |
1390 | ||
5b4a0ec0 | 1391 | rcu_read_lock(); |
421cb601 | 1392 | |
bec39940 | 1393 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
90eaa0d2 | 1394 | struct lttng_ust_tracepoint_iter uiter; |
ac3bd9c0 | 1395 | |
5b4a0ec0 DG |
1396 | handle = ustctl_tracepoint_list(app->key.sock); |
1397 | if (handle < 0) { | |
1398 | ERR("UST app list events getting handle failed for app pid %d", | |
1399 | app->key.pid); | |
1400 | continue; | |
1401 | } | |
421cb601 | 1402 | |
5b4a0ec0 | 1403 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, |
90eaa0d2 | 1404 | &uiter)) != -ENOENT) { |
815564d8 MD |
1405 | if (count >= nbmem) { |
1406 | DBG2("Reallocating event list from %zu to %zu entries", nbmem, | |
1407 | 2 * nbmem); | |
1408 | nbmem *= 2; | |
2f221590 | 1409 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event)); |
5b4a0ec0 DG |
1410 | if (tmp == NULL) { |
1411 | PERROR("realloc ust app events"); | |
1412 | ret = -ENOMEM; | |
1413 | goto rcu_error; | |
1414 | } | |
1415 | } | |
90eaa0d2 DG |
1416 | memcpy(tmp[count].name, uiter.name, LTTNG_UST_SYM_NAME_LEN); |
1417 | memcpy(tmp[count].loglevel, uiter.loglevel, LTTNG_UST_SYM_NAME_LEN); | |
1418 | tmp[count].loglevel_value = uiter.loglevel_value; | |
5b4a0ec0 DG |
1419 | tmp[count].type = LTTNG_UST_TRACEPOINT; |
1420 | tmp[count].pid = app->key.pid; | |
1421 | tmp[count].enabled = -1; | |
1422 | count++; | |
421cb601 | 1423 | } |
421cb601 DG |
1424 | } |
1425 | ||
5b4a0ec0 DG |
1426 | ret = count; |
1427 | *events = tmp; | |
421cb601 | 1428 | |
5b4a0ec0 | 1429 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1430 | |
5b4a0ec0 DG |
1431 | rcu_error: |
1432 | rcu_read_unlock(); | |
421cb601 | 1433 | error: |
5b4a0ec0 | 1434 | return ret; |
421cb601 DG |
1435 | } |
1436 | ||
5b4a0ec0 DG |
1437 | /* |
1438 | * Free and clean all traceable apps of the global list. | |
1439 | */ | |
1440 | void ust_app_clean_list(void) | |
421cb601 | 1441 | { |
5b4a0ec0 | 1442 | int ret; |
bec39940 DG |
1443 | struct lttng_ht_iter iter; |
1444 | struct lttng_ht_node_ulong *node; | |
421cb601 | 1445 | |
5b4a0ec0 | 1446 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1447 | |
5b4a0ec0 | 1448 | rcu_read_lock(); |
421cb601 | 1449 | |
bec39940 DG |
1450 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, node, node) { |
1451 | ret = lttng_ht_del(ust_app_ht, &iter); | |
525b0740 | 1452 | assert(!ret); |
bec39940 | 1453 | call_rcu(&node->head, delete_ust_app_rcu); |
421cb601 | 1454 | } |
bec39940 DG |
1455 | /* Destroy is done only when the ht is empty */ |
1456 | lttng_ht_destroy(ust_app_ht); | |
421cb601 | 1457 | |
bec39940 DG |
1458 | cds_lfht_for_each_entry(ust_app_sock_key_map->ht, &iter.iter, node, node) { |
1459 | ret = lttng_ht_del(ust_app_sock_key_map, &iter); | |
1460 | assert(!ret); | |
1461 | } | |
1462 | /* Destroy is done only when the ht is empty */ | |
1463 | lttng_ht_destroy(ust_app_sock_key_map); | |
421cb601 | 1464 | |
5b4a0ec0 DG |
1465 | rcu_read_unlock(); |
1466 | } | |
1467 | ||
1468 | /* | |
1469 | * Init UST app hash table. | |
1470 | */ | |
1471 | void ust_app_ht_alloc(void) | |
1472 | { | |
bec39940 DG |
1473 | ust_app_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1474 | ust_app_sock_key_map = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
421cb601 DG |
1475 | } |
1476 | ||
78f0bacd DG |
1477 | /* |
1478 | * For a specific UST session, disable the channel for all registered apps. | |
1479 | */ | |
35a9059d | 1480 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1481 | struct ltt_ust_channel *uchan) |
1482 | { | |
1483 | int ret = 0; | |
bec39940 DG |
1484 | struct lttng_ht_iter iter; |
1485 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1486 | struct ust_app *app; |
1487 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1488 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1489 | |
1490 | if (usess == NULL || uchan == NULL) { | |
1491 | ERR("Disabling UST global channel with NULL values"); | |
1492 | ret = -1; | |
1493 | goto error; | |
1494 | } | |
1495 | ||
a991f516 MD |
1496 | DBG2("UST app disabling channel %s from global domain for session id %d", |
1497 | uchan->name, usess->id); | |
78f0bacd DG |
1498 | |
1499 | rcu_read_lock(); | |
1500 | ||
1501 | /* For every registered applications */ | |
bec39940 DG |
1502 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
1503 | struct lttng_ht_iter uiter; | |
78f0bacd DG |
1504 | ua_sess = lookup_session_by_app(usess, app); |
1505 | if (ua_sess == NULL) { | |
1506 | continue; | |
1507 | } | |
1508 | ||
8535a6d9 | 1509 | /* Get channel */ |
bec39940 DG |
1510 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1511 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
8535a6d9 DG |
1512 | /* If the session if found for the app, the channel must be there */ |
1513 | assert(ua_chan_node); | |
1514 | ||
1515 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1516 | /* The channel must not be already disabled */ | |
1517 | assert(ua_chan->enabled == 1); | |
1518 | ||
1519 | /* Disable channel onto application */ | |
1520 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1521 | if (ret < 0) { |
1522 | /* XXX: We might want to report this error at some point... */ | |
1523 | continue; | |
1524 | } | |
1525 | } | |
1526 | ||
1527 | rcu_read_unlock(); | |
1528 | ||
1529 | error: | |
1530 | return ret; | |
1531 | } | |
1532 | ||
1533 | /* | |
1534 | * For a specific UST session, enable the channel for all registered apps. | |
1535 | */ | |
35a9059d | 1536 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1537 | struct ltt_ust_channel *uchan) |
1538 | { | |
1539 | int ret = 0; | |
bec39940 | 1540 | struct lttng_ht_iter iter; |
78f0bacd DG |
1541 | struct ust_app *app; |
1542 | struct ust_app_session *ua_sess; | |
1543 | ||
1544 | if (usess == NULL || uchan == NULL) { | |
1545 | ERR("Adding UST global channel to NULL values"); | |
1546 | ret = -1; | |
1547 | goto error; | |
1548 | } | |
1549 | ||
a991f516 MD |
1550 | DBG2("UST app enabling channel %s to global domain for session id %d", |
1551 | uchan->name, usess->id); | |
78f0bacd DG |
1552 | |
1553 | rcu_read_lock(); | |
1554 | ||
1555 | /* For every registered applications */ | |
bec39940 | 1556 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
78f0bacd DG |
1557 | ua_sess = lookup_session_by_app(usess, app); |
1558 | if (ua_sess == NULL) { | |
1559 | continue; | |
1560 | } | |
1561 | ||
1562 | /* Enable channel onto application */ | |
1563 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1564 | if (ret < 0) { | |
1565 | /* XXX: We might want to report this error at some point... */ | |
1566 | continue; | |
1567 | } | |
1568 | } | |
1569 | ||
1570 | rcu_read_unlock(); | |
1571 | ||
1572 | error: | |
1573 | return ret; | |
1574 | } | |
1575 | ||
b0a40d28 DG |
1576 | /* |
1577 | * Disable an event in a channel and for a specific session. | |
1578 | */ | |
35a9059d DG |
1579 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
1580 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
1581 | { |
1582 | int ret = 0; | |
bec39940 DG |
1583 | struct lttng_ht_iter iter, uiter; |
1584 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
b0a40d28 DG |
1585 | struct ust_app *app; |
1586 | struct ust_app_session *ua_sess; | |
1587 | struct ust_app_channel *ua_chan; | |
1588 | struct ust_app_event *ua_event; | |
1589 | ||
1590 | DBG("UST app disabling event %s for all apps in channel " | |
a991f516 | 1591 | "%s for session id %d", uevent->attr.name, uchan->name, usess->id); |
b0a40d28 DG |
1592 | |
1593 | rcu_read_lock(); | |
1594 | ||
1595 | /* For all registered applications */ | |
bec39940 | 1596 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
b0a40d28 DG |
1597 | ua_sess = lookup_session_by_app(usess, app); |
1598 | if (ua_sess == NULL) { | |
1599 | /* Next app */ | |
1600 | continue; | |
1601 | } | |
1602 | ||
1603 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1604 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1605 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 | 1606 | if (ua_chan_node == NULL) { |
a991f516 MD |
1607 | DBG2("Channel %s not found in session id %d for app pid %d." |
1608 | "Skipping", uchan->name, usess->id, app->key.pid); | |
b0a40d28 DG |
1609 | continue; |
1610 | } | |
1611 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1612 | ||
bec39940 DG |
1613 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
1614 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 DG |
1615 | if (ua_event_node == NULL) { |
1616 | DBG2("Event %s not found in channel %s for app pid %d." | |
35a9059d | 1617 | "Skipping", uevent->attr.name, uchan->name, app->key.pid); |
b0a40d28 DG |
1618 | continue; |
1619 | } | |
1620 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1621 | ||
7f79d3a1 | 1622 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
b0a40d28 DG |
1623 | if (ret < 0) { |
1624 | /* XXX: Report error someday... */ | |
1625 | continue; | |
1626 | } | |
1627 | } | |
1628 | ||
1629 | rcu_read_unlock(); | |
1630 | ||
1631 | return ret; | |
1632 | } | |
1633 | ||
9730260e | 1634 | /* |
edb67388 | 1635 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
1636 | * registered apps. |
1637 | */ | |
35a9059d | 1638 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
1639 | struct ltt_ust_channel *uchan) |
1640 | { | |
1641 | int ret = 0; | |
bec39940 DG |
1642 | struct lttng_ht_iter iter, uiter; |
1643 | struct lttng_ht_node_str *ua_chan_node; | |
9730260e DG |
1644 | struct ust_app *app; |
1645 | struct ust_app_session *ua_sess; | |
1646 | struct ust_app_channel *ua_chan; | |
1647 | struct ust_app_event *ua_event; | |
1648 | ||
1649 | DBG("UST app disabling all event for all apps in channel " | |
a991f516 | 1650 | "%s for session id %d", uchan->name, usess->id); |
9730260e DG |
1651 | |
1652 | rcu_read_lock(); | |
1653 | ||
1654 | /* For all registered applications */ | |
bec39940 | 1655 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
9730260e | 1656 | ua_sess = lookup_session_by_app(usess, app); |
edb67388 DG |
1657 | /* If ua_sess is NULL, there is a code flow error */ |
1658 | assert(ua_sess); | |
9730260e DG |
1659 | |
1660 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1661 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1662 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1663 | /* If the channel is not found, there is a code flow error */ |
1664 | assert(ua_chan_node); | |
1665 | ||
9730260e DG |
1666 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1667 | ||
1668 | /* Disable each events of channel */ | |
bec39940 DG |
1669 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
1670 | node.node) { | |
7f79d3a1 | 1671 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
9730260e DG |
1672 | if (ret < 0) { |
1673 | /* XXX: Report error someday... */ | |
1674 | continue; | |
1675 | } | |
1676 | } | |
1677 | } | |
1678 | ||
1679 | rcu_read_unlock(); | |
1680 | ||
1681 | return ret; | |
1682 | } | |
1683 | ||
421cb601 | 1684 | /* |
5b4a0ec0 | 1685 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1686 | */ |
35a9059d | 1687 | int ust_app_create_channel_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1688 | struct ltt_ust_channel *uchan) |
1689 | { | |
bec39940 | 1690 | struct lttng_ht_iter iter; |
48842b30 DG |
1691 | struct ust_app *app; |
1692 | struct ust_app_session *ua_sess; | |
1693 | struct ust_app_channel *ua_chan; | |
1694 | ||
fc34caaa DG |
1695 | /* Very wrong code flow */ |
1696 | assert(usess); | |
1697 | assert(uchan); | |
421cb601 | 1698 | |
a991f516 MD |
1699 | DBG2("UST app adding channel %s to global domain for session id %d", |
1700 | uchan->name, usess->id); | |
48842b30 DG |
1701 | |
1702 | rcu_read_lock(); | |
421cb601 | 1703 | |
5b4a0ec0 | 1704 | /* For every registered applications */ |
bec39940 | 1705 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
edb67388 DG |
1706 | /* |
1707 | * Create session on the tracer side and add it to app session HT. Note | |
1708 | * that if session exist, it will simply return a pointer to the ust | |
1709 | * app session. | |
1710 | */ | |
421cb601 | 1711 | ua_sess = create_ust_app_session(usess, app); |
509cbaf8 | 1712 | if (ua_sess == NULL) { |
fc34caaa DG |
1713 | /* Major problem here and it's maybe the tracer or malloc() */ |
1714 | goto error; | |
48842b30 DG |
1715 | } |
1716 | ||
421cb601 DG |
1717 | /* Create channel onto application */ |
1718 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1719 | if (ua_chan == NULL) { | |
fc34caaa DG |
1720 | /* Major problem here and it's maybe the tracer or malloc() */ |
1721 | goto error; | |
48842b30 | 1722 | } |
48842b30 | 1723 | } |
5b4a0ec0 | 1724 | |
48842b30 DG |
1725 | rcu_read_unlock(); |
1726 | ||
fc34caaa DG |
1727 | return 0; |
1728 | ||
421cb601 | 1729 | error: |
fc34caaa | 1730 | return -1; |
48842b30 DG |
1731 | } |
1732 | ||
5b4a0ec0 | 1733 | /* |
edb67388 | 1734 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 1735 | */ |
35a9059d | 1736 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1737 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1738 | { | |
1739 | int ret = 0; | |
bec39940 DG |
1740 | struct lttng_ht_iter iter, uiter; |
1741 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
48842b30 DG |
1742 | struct ust_app *app; |
1743 | struct ust_app_session *ua_sess; | |
1744 | struct ust_app_channel *ua_chan; | |
1745 | struct ust_app_event *ua_event; | |
48842b30 | 1746 | |
a991f516 MD |
1747 | DBG("UST app enabling event %s for all apps for session id %d", |
1748 | uevent->attr.name, usess->id); | |
48842b30 | 1749 | |
edb67388 DG |
1750 | /* |
1751 | * NOTE: At this point, this function is called only if the session and | |
1752 | * channel passed are already created for all apps. and enabled on the | |
1753 | * tracer also. | |
1754 | */ | |
1755 | ||
48842b30 | 1756 | rcu_read_lock(); |
421cb601 DG |
1757 | |
1758 | /* For all registered applications */ | |
bec39940 | 1759 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
edb67388 DG |
1760 | ua_sess = lookup_session_by_app(usess, app); |
1761 | /* If ua_sess is NULL, there is a code flow error */ | |
1762 | assert(ua_sess); | |
ba767faf | 1763 | |
edb67388 | 1764 | /* Lookup channel in the ust app session */ |
bec39940 DG |
1765 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1766 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1767 | /* If the channel is not found, there is a code flow error */ |
1768 | assert(ua_chan_node); | |
1769 | ||
1770 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1771 | ||
bec39940 DG |
1772 | lttng_ht_lookup(ua_chan->events, (void*)uevent->attr.name, &uiter); |
1773 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
35a9059d | 1774 | if (ua_event_node == NULL) { |
7f79d3a1 DG |
1775 | DBG3("UST app enable event %s not found for app PID %d." |
1776 | "Skipping app", uevent->attr.name, app->key.pid); | |
35a9059d DG |
1777 | continue; |
1778 | } | |
1779 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1780 | ||
1781 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
1782 | if (ret < 0) { | |
7f79d3a1 | 1783 | goto error; |
48842b30 | 1784 | } |
edb67388 DG |
1785 | } |
1786 | ||
7f79d3a1 | 1787 | error: |
edb67388 | 1788 | rcu_read_unlock(); |
edb67388 DG |
1789 | return ret; |
1790 | } | |
1791 | ||
1792 | /* | |
1793 | * For a specific existing UST session and UST channel, creates the event for | |
1794 | * all registered apps. | |
1795 | */ | |
35a9059d | 1796 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
1797 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1798 | { | |
1799 | int ret = 0; | |
bec39940 DG |
1800 | struct lttng_ht_iter iter, uiter; |
1801 | struct lttng_ht_node_str *ua_chan_node; | |
edb67388 DG |
1802 | struct ust_app *app; |
1803 | struct ust_app_session *ua_sess; | |
1804 | struct ust_app_channel *ua_chan; | |
1805 | ||
a991f516 MD |
1806 | DBG("UST app creating event %s for all apps for session id %d", |
1807 | uevent->attr.name, usess->id); | |
edb67388 | 1808 | |
edb67388 DG |
1809 | rcu_read_lock(); |
1810 | ||
1811 | /* For all registered applications */ | |
bec39940 | 1812 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
edb67388 DG |
1813 | ua_sess = lookup_session_by_app(usess, app); |
1814 | /* If ua_sess is NULL, there is a code flow error */ | |
1815 | assert(ua_sess); | |
48842b30 DG |
1816 | |
1817 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1818 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1819 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1820 | /* If the channel is not found, there is a code flow error */ |
1821 | assert(ua_chan_node); | |
1822 | ||
48842b30 DG |
1823 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1824 | ||
edb67388 DG |
1825 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1826 | if (ret < 0) { | |
fc34caaa DG |
1827 | if (ret != -EEXIST) { |
1828 | /* Possible value at this point: -ENOMEM. If so, we stop! */ | |
1829 | break; | |
1830 | } | |
1831 | DBG2("UST app event %s already exist on app PID %d", | |
1832 | uevent->attr.name, app->key.pid); | |
5b4a0ec0 | 1833 | continue; |
48842b30 | 1834 | } |
48842b30 | 1835 | } |
5b4a0ec0 | 1836 | |
48842b30 DG |
1837 | rcu_read_unlock(); |
1838 | ||
1839 | return ret; | |
1840 | } | |
1841 | ||
5b4a0ec0 DG |
1842 | /* |
1843 | * Start tracing for a specific UST session and app. | |
1844 | */ | |
421cb601 | 1845 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1846 | { |
1847 | int ret = 0; | |
bec39940 | 1848 | struct lttng_ht_iter iter; |
48842b30 DG |
1849 | struct ust_app_session *ua_sess; |
1850 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 1851 | struct ltt_ust_stream *ustream; |
7753dea8 | 1852 | int consumerd_fd; |
48842b30 | 1853 | |
421cb601 | 1854 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 1855 | |
509cbaf8 MD |
1856 | rcu_read_lock(); |
1857 | ||
421cb601 DG |
1858 | ua_sess = lookup_session_by_app(usess, app); |
1859 | if (ua_sess == NULL) { | |
509cbaf8 | 1860 | goto error_rcu_unlock; |
421cb601 | 1861 | } |
48842b30 | 1862 | |
aea829b3 DG |
1863 | /* Upon restart, we skip the setup, already done */ |
1864 | if (ua_sess->started) { | |
8be98f9a | 1865 | goto skip_setup; |
aea829b3 | 1866 | } |
8be98f9a | 1867 | |
421cb601 DG |
1868 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1869 | if (ret < 0) { | |
509cbaf8 | 1870 | goto error_rcu_unlock; |
421cb601 | 1871 | } |
48842b30 | 1872 | |
421cb601 | 1873 | /* For each channel */ |
bec39940 DG |
1874 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
1875 | node.node) { | |
421cb601 DG |
1876 | /* Create all streams */ |
1877 | while (1) { | |
5b4a0ec0 | 1878 | /* Create UST stream */ |
421cb601 DG |
1879 | ustream = zmalloc(sizeof(*ustream)); |
1880 | if (ustream == NULL) { | |
1881 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1882 | goto error_rcu_unlock; |
421cb601 | 1883 | } |
48842b30 | 1884 | |
421cb601 DG |
1885 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
1886 | &ustream->obj); | |
48842b30 | 1887 | if (ret < 0) { |
421cb601 DG |
1888 | /* Got all streams */ |
1889 | break; | |
48842b30 | 1890 | } |
421cb601 | 1891 | ustream->handle = ustream->obj->handle; |
48842b30 | 1892 | |
421cb601 DG |
1893 | /* Order is important */ |
1894 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
477d7741 MD |
1895 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", |
1896 | ua_sess->path, ua_chan->name, | |
1897 | ua_chan->streams.count++); | |
aba8e916 DG |
1898 | if (ret < 0) { |
1899 | PERROR("asprintf UST create stream"); | |
421cb601 | 1900 | continue; |
aba8e916 | 1901 | } |
421cb601 DG |
1902 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1903 | ustream->pathname); | |
1904 | } | |
421cb601 | 1905 | } |
aba8e916 | 1906 | |
7753dea8 MD |
1907 | switch (app->bits_per_long) { |
1908 | case 64: | |
1909 | consumerd_fd = ust_consumerd64_fd; | |
1910 | break; | |
1911 | case 32: | |
1912 | consumerd_fd = ust_consumerd32_fd; | |
1913 | break; | |
1914 | default: | |
1915 | ret = -EINVAL; | |
1916 | goto error_rcu_unlock; | |
1917 | } | |
aea829b3 | 1918 | |
421cb601 | 1919 | /* Setup UST consumer socket and send fds to it */ |
7753dea8 | 1920 | ret = ust_consumer_send_session(consumerd_fd, ua_sess); |
421cb601 | 1921 | if (ret < 0) { |
509cbaf8 | 1922 | goto error_rcu_unlock; |
421cb601 | 1923 | } |
8be98f9a | 1924 | ua_sess->started = 1; |
48842b30 | 1925 | |
8be98f9a | 1926 | skip_setup: |
421cb601 DG |
1927 | /* This start the UST tracing */ |
1928 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
1929 | if (ret < 0) { | |
1930 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 1931 | goto error_rcu_unlock; |
421cb601 | 1932 | } |
5b4a0ec0 | 1933 | |
509cbaf8 | 1934 | rcu_read_unlock(); |
48842b30 | 1935 | |
421cb601 DG |
1936 | /* Quiescent wait after starting trace */ |
1937 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 1938 | |
421cb601 | 1939 | return 0; |
48842b30 | 1940 | |
509cbaf8 MD |
1941 | error_rcu_unlock: |
1942 | rcu_read_unlock(); | |
421cb601 DG |
1943 | return -1; |
1944 | } | |
48842b30 | 1945 | |
8be98f9a MD |
1946 | /* |
1947 | * Stop tracing for a specific UST session and app. | |
1948 | */ | |
1949 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1950 | { | |
1951 | int ret = 0; | |
bec39940 | 1952 | struct lttng_ht_iter iter; |
8be98f9a | 1953 | struct ust_app_session *ua_sess; |
6d3686da | 1954 | struct ust_app_channel *ua_chan; |
8be98f9a MD |
1955 | |
1956 | DBG("Stopping tracing for ust app pid %d", app->key.pid); | |
1957 | ||
1958 | rcu_read_lock(); | |
1959 | ||
1960 | ua_sess = lookup_session_by_app(usess, app); | |
1961 | if (ua_sess == NULL) { | |
1962 | /* Only malloc can failed so something is really wrong */ | |
1963 | goto error_rcu_unlock; | |
1964 | } | |
1965 | ||
7db205b5 DG |
1966 | /* Not started, continuing. */ |
1967 | if (ua_sess->started == 0) { | |
1968 | goto end; | |
1969 | } | |
1970 | ||
9d6c7d3f DG |
1971 | /* This inhibits UST tracing */ |
1972 | ret = ustctl_stop_session(app->key.sock, ua_sess->handle); | |
1973 | if (ret < 0) { | |
1974 | ERR("Error stopping tracing for app pid: %d", app->key.pid); | |
1975 | goto error_rcu_unlock; | |
1976 | } | |
1977 | ||
1978 | /* Quiescent wait after stopping trace */ | |
1979 | ustctl_wait_quiescent(app->key.sock); | |
1980 | ||
1981 | /* Flushing buffers */ | |
bec39940 DG |
1982 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
1983 | node.node) { | |
6d3686da | 1984 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_chan->obj); |
8be98f9a | 1985 | if (ret < 0) { |
7db205b5 DG |
1986 | ERR("UST app PID %d channel %s flush failed with ret %d", |
1987 | app->key.pid, ua_chan->name, ret); | |
6d3686da DG |
1988 | /* Continuing flushing all buffers */ |
1989 | continue; | |
8be98f9a MD |
1990 | } |
1991 | } | |
8be98f9a | 1992 | |
90d97d10 DG |
1993 | /* Flush all buffers before stopping */ |
1994 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_sess->metadata->obj); | |
1995 | if (ret < 0) { | |
7db205b5 DG |
1996 | ERR("UST app PID %d metadata flush failed with ret %d", app->key.pid, |
1997 | ret); | |
90d97d10 DG |
1998 | } |
1999 | ||
7db205b5 | 2000 | ua_sess->started = 0; |
9d6c7d3f | 2001 | |
7db205b5 DG |
2002 | end: |
2003 | rcu_read_unlock(); | |
8be98f9a MD |
2004 | return 0; |
2005 | ||
2006 | error_rcu_unlock: | |
2007 | rcu_read_unlock(); | |
2008 | return -1; | |
2009 | } | |
2010 | ||
84cd17c6 MD |
2011 | /* |
2012 | * Destroy a specific UST session in apps. | |
2013 | */ | |
2014 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2015 | { | |
2016 | struct ust_app_session *ua_sess; | |
2017 | struct lttng_ust_object_data obj; | |
bec39940 DG |
2018 | struct lttng_ht_iter iter; |
2019 | struct lttng_ht_node_ulong *node; | |
525b0740 | 2020 | int ret; |
84cd17c6 MD |
2021 | |
2022 | DBG("Destroy tracing for ust app pid %d", app->key.pid); | |
2023 | ||
2024 | rcu_read_lock(); | |
2025 | ||
2026 | __lookup_session_by_app(usess, app, &iter); | |
bec39940 | 2027 | node = lttng_ht_iter_get_node_ulong(&iter); |
84cd17c6 MD |
2028 | if (node == NULL) { |
2029 | /* Only malloc can failed so something is really wrong */ | |
2030 | goto error_rcu_unlock; | |
2031 | } | |
2032 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
bec39940 | 2033 | ret = lttng_ht_del(app->sessions, &iter); |
525b0740 | 2034 | assert(!ret); |
84cd17c6 MD |
2035 | obj.handle = ua_sess->handle; |
2036 | obj.shm_fd = -1; | |
2037 | obj.wait_fd = -1; | |
2038 | obj.memory_map_size = 0; | |
2039 | ustctl_release_object(app->key.sock, &obj); | |
2040 | ||
7db205b5 DG |
2041 | delete_ust_app_session(app->key.sock, ua_sess); |
2042 | ||
84cd17c6 MD |
2043 | rcu_read_unlock(); |
2044 | ||
2045 | /* Quiescent wait after stopping trace */ | |
2046 | ustctl_wait_quiescent(app->key.sock); | |
2047 | ||
2048 | return 0; | |
2049 | ||
2050 | error_rcu_unlock: | |
2051 | rcu_read_unlock(); | |
2052 | return -1; | |
2053 | } | |
2054 | ||
5b4a0ec0 DG |
2055 | /* |
2056 | * Start tracing for the UST session. | |
2057 | */ | |
421cb601 DG |
2058 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
2059 | { | |
2060 | int ret = 0; | |
bec39940 | 2061 | struct lttng_ht_iter iter; |
421cb601 | 2062 | struct ust_app *app; |
48842b30 | 2063 | |
421cb601 DG |
2064 | DBG("Starting all UST traces"); |
2065 | ||
2066 | rcu_read_lock(); | |
421cb601 | 2067 | |
bec39940 | 2068 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
421cb601 | 2069 | ret = ust_app_start_trace(usess, app); |
48842b30 | 2070 | if (ret < 0) { |
5b4a0ec0 DG |
2071 | /* Continue to next apps even on error */ |
2072 | continue; | |
48842b30 | 2073 | } |
48842b30 | 2074 | } |
5b4a0ec0 | 2075 | |
48842b30 DG |
2076 | rcu_read_unlock(); |
2077 | ||
2078 | return 0; | |
2079 | } | |
487cf67c | 2080 | |
8be98f9a MD |
2081 | /* |
2082 | * Start tracing for the UST session. | |
2083 | */ | |
2084 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
2085 | { | |
2086 | int ret = 0; | |
bec39940 | 2087 | struct lttng_ht_iter iter; |
8be98f9a MD |
2088 | struct ust_app *app; |
2089 | ||
2090 | DBG("Stopping all UST traces"); | |
2091 | ||
2092 | rcu_read_lock(); | |
2093 | ||
bec39940 | 2094 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
8be98f9a MD |
2095 | ret = ust_app_stop_trace(usess, app); |
2096 | if (ret < 0) { | |
2097 | /* Continue to next apps even on error */ | |
2098 | continue; | |
2099 | } | |
2100 | } | |
2101 | ||
2102 | rcu_read_unlock(); | |
2103 | ||
2104 | return 0; | |
2105 | } | |
2106 | ||
84cd17c6 MD |
2107 | /* |
2108 | * Destroy app UST session. | |
2109 | */ | |
2110 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
2111 | { | |
2112 | int ret = 0; | |
bec39940 | 2113 | struct lttng_ht_iter iter; |
84cd17c6 MD |
2114 | struct ust_app *app; |
2115 | ||
2116 | DBG("Destroy all UST traces"); | |
2117 | ||
2118 | rcu_read_lock(); | |
2119 | ||
bec39940 | 2120 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
84cd17c6 MD |
2121 | ret = ust_app_destroy_trace(usess, app); |
2122 | if (ret < 0) { | |
2123 | /* Continue to next apps even on error */ | |
2124 | continue; | |
2125 | } | |
2126 | } | |
2127 | ||
2128 | rcu_read_unlock(); | |
2129 | ||
2130 | return 0; | |
2131 | } | |
2132 | ||
5b4a0ec0 DG |
2133 | /* |
2134 | * Add channels/events from UST global domain to registered apps at sock. | |
2135 | */ | |
487cf67c DG |
2136 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
2137 | { | |
2138 | int ret = 0; | |
bec39940 | 2139 | struct lttng_ht_iter iter, uiter; |
487cf67c DG |
2140 | struct ust_app *app; |
2141 | struct ust_app_session *ua_sess; | |
2142 | struct ust_app_channel *ua_chan; | |
2143 | struct ust_app_event *ua_event; | |
1f3580c7 DG |
2144 | |
2145 | if (usess == NULL) { | |
5b4a0ec0 | 2146 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
2147 | goto error; |
2148 | } | |
2149 | ||
a991f516 MD |
2150 | DBG2("UST app global update for app sock %d for session id %d", sock, |
2151 | usess->id); | |
487cf67c | 2152 | |
284d8f55 DG |
2153 | rcu_read_lock(); |
2154 | ||
487cf67c DG |
2155 | app = find_app_by_sock(sock); |
2156 | if (app == NULL) { | |
2157 | ERR("Failed to update app sock %d", sock); | |
2158 | goto error; | |
2159 | } | |
2160 | ||
421cb601 | 2161 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 2162 | if (ua_sess == NULL) { |
487cf67c DG |
2163 | goto error; |
2164 | } | |
2165 | ||
284d8f55 DG |
2166 | /* |
2167 | * We can iterate safely here over all UST app session sicne the create ust | |
2168 | * app session above made a shadow copy of the UST global domain from the | |
2169 | * ltt ust session. | |
2170 | */ | |
bec39940 DG |
2171 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2172 | node.node) { | |
284d8f55 DG |
2173 | ret = create_ust_channel(app, ua_sess, ua_chan); |
2174 | if (ret < 0) { | |
2175 | /* FIXME: Should we quit here or continue... */ | |
2176 | continue; | |
487cf67c DG |
2177 | } |
2178 | ||
284d8f55 | 2179 | /* For each events */ |
bec39940 DG |
2180 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
2181 | node.node) { | |
284d8f55 DG |
2182 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
2183 | if (ret < 0) { | |
2184 | /* FIXME: Should we quit here or continue... */ | |
2185 | continue; | |
487cf67c | 2186 | } |
36dc12cc | 2187 | } |
487cf67c DG |
2188 | } |
2189 | ||
36dc12cc | 2190 | if (usess->start_trace) { |
421cb601 | 2191 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 2192 | if (ret < 0) { |
36dc12cc DG |
2193 | goto error; |
2194 | } | |
2195 | ||
36dc12cc DG |
2196 | DBG2("UST trace started for app pid %d", app->key.pid); |
2197 | } | |
2198 | ||
487cf67c DG |
2199 | error: |
2200 | rcu_read_unlock(); | |
2201 | return; | |
2202 | } | |
55cc08a6 DG |
2203 | |
2204 | /* | |
2205 | * Add context to a specific channel for global UST domain. | |
2206 | */ | |
2207 | int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess, | |
2208 | struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx) | |
2209 | { | |
2210 | int ret = 0; | |
bec39940 DG |
2211 | struct lttng_ht_node_str *ua_chan_node; |
2212 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2213 | struct ust_app_channel *ua_chan = NULL; |
2214 | struct ust_app_session *ua_sess; | |
2215 | struct ust_app *app; | |
2216 | ||
2217 | rcu_read_lock(); | |
2218 | ||
bec39940 | 2219 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
55cc08a6 DG |
2220 | ua_sess = lookup_session_by_app(usess, app); |
2221 | if (ua_sess == NULL) { | |
2222 | continue; | |
2223 | } | |
2224 | ||
2225 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2226 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2227 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2228 | if (ua_chan_node == NULL) { |
2229 | continue; | |
2230 | } | |
2231 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2232 | node); | |
2233 | ||
2234 | ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app); | |
2235 | if (ret < 0) { | |
2236 | continue; | |
2237 | } | |
2238 | } | |
2239 | ||
55cc08a6 DG |
2240 | rcu_read_unlock(); |
2241 | return ret; | |
2242 | } | |
2243 | ||
2244 | /* | |
2245 | * Add context to a specific event in a channel for global UST domain. | |
2246 | */ | |
2247 | int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess, | |
2248 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
2249 | struct ltt_ust_context *uctx) | |
2250 | { | |
2251 | int ret = 0; | |
bec39940 DG |
2252 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; |
2253 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2254 | struct ust_app_session *ua_sess; |
2255 | struct ust_app_event *ua_event; | |
2256 | struct ust_app_channel *ua_chan = NULL; | |
2257 | struct ust_app *app; | |
2258 | ||
2259 | rcu_read_lock(); | |
2260 | ||
bec39940 | 2261 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
55cc08a6 DG |
2262 | ua_sess = lookup_session_by_app(usess, app); |
2263 | if (ua_sess == NULL) { | |
2264 | continue; | |
2265 | } | |
2266 | ||
2267 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2268 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2269 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2270 | if (ua_chan_node == NULL) { |
2271 | continue; | |
2272 | } | |
2273 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2274 | node); | |
2275 | ||
bec39940 DG |
2276 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
2277 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2278 | if (ua_event_node == NULL) { |
2279 | continue; | |
2280 | } | |
2281 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, | |
2282 | node); | |
2283 | ||
2284 | ret = create_ust_app_event_context(ua_sess, ua_event, &uctx->ctx, app); | |
2285 | if (ret < 0) { | |
2286 | continue; | |
2287 | } | |
2288 | } | |
2289 | ||
55cc08a6 DG |
2290 | rcu_read_unlock(); |
2291 | return ret; | |
2292 | } | |
76d45b40 DG |
2293 | |
2294 | /* | |
2295 | * Enable event for a channel from a UST session for a specific PID. | |
2296 | */ | |
2297 | int ust_app_enable_event_pid(struct ltt_ust_session *usess, | |
2298 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2299 | { | |
2300 | int ret = 0; | |
bec39940 DG |
2301 | struct lttng_ht_iter iter; |
2302 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
76d45b40 DG |
2303 | struct ust_app *app; |
2304 | struct ust_app_session *ua_sess; | |
2305 | struct ust_app_channel *ua_chan; | |
2306 | struct ust_app_event *ua_event; | |
2307 | ||
2308 | DBG("UST app enabling event %s for PID %d", uevent->attr.name, pid); | |
2309 | ||
2310 | rcu_read_lock(); | |
2311 | ||
2312 | app = ust_app_find_by_pid(pid); | |
2313 | if (app == NULL) { | |
2314 | ERR("UST app enable event per PID %d not found", pid); | |
2315 | ret = -1; | |
2316 | goto error; | |
2317 | } | |
2318 | ||
2319 | ua_sess = lookup_session_by_app(usess, app); | |
2320 | /* If ua_sess is NULL, there is a code flow error */ | |
2321 | assert(ua_sess); | |
2322 | ||
2323 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2324 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2325 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2326 | /* If the channel is not found, there is a code flow error */ |
2327 | assert(ua_chan_node); | |
2328 | ||
2329 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2330 | ||
bec39940 DG |
2331 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2332 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2333 | if (ua_event_node == NULL) { |
2334 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); | |
2335 | if (ret < 0) { | |
2336 | goto error; | |
2337 | } | |
2338 | } else { | |
2339 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2340 | ||
2341 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2342 | if (ret < 0) { | |
2343 | goto error; | |
2344 | } | |
2345 | } | |
2346 | ||
2347 | error: | |
2348 | rcu_read_unlock(); | |
2349 | return ret; | |
2350 | } | |
7f79d3a1 DG |
2351 | |
2352 | /* | |
2353 | * Disable event for a channel from a UST session for a specific PID. | |
2354 | */ | |
2355 | int ust_app_disable_event_pid(struct ltt_ust_session *usess, | |
2356 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2357 | { | |
2358 | int ret = 0; | |
bec39940 DG |
2359 | struct lttng_ht_iter iter; |
2360 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
7f79d3a1 DG |
2361 | struct ust_app *app; |
2362 | struct ust_app_session *ua_sess; | |
2363 | struct ust_app_channel *ua_chan; | |
2364 | struct ust_app_event *ua_event; | |
2365 | ||
2366 | DBG("UST app disabling event %s for PID %d", uevent->attr.name, pid); | |
2367 | ||
2368 | rcu_read_lock(); | |
2369 | ||
2370 | app = ust_app_find_by_pid(pid); | |
2371 | if (app == NULL) { | |
2372 | ERR("UST app disable event per PID %d not found", pid); | |
2373 | ret = -1; | |
2374 | goto error; | |
2375 | } | |
2376 | ||
2377 | ua_sess = lookup_session_by_app(usess, app); | |
2378 | /* If ua_sess is NULL, there is a code flow error */ | |
2379 | assert(ua_sess); | |
2380 | ||
2381 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2382 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2383 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2384 | if (ua_chan_node == NULL) { |
2385 | /* Channel does not exist, skip disabling */ | |
2386 | goto error; | |
2387 | } | |
2388 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2389 | ||
bec39940 DG |
2390 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2391 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2392 | if (ua_event_node == NULL) { |
2393 | /* Event does not exist, skip disabling */ | |
2394 | goto error; | |
2395 | } | |
2396 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2397 | ||
2398 | ret = disable_ust_app_event(ua_sess, ua_event, app); | |
2399 | if (ret < 0) { | |
2400 | goto error; | |
2401 | } | |
2402 | ||
2403 | error: | |
2404 | rcu_read_unlock(); | |
2405 | return ret; | |
2406 | } |