Commit | Line | Data |
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91d76f53 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
82a3637f DG |
6 | * as published by the Free Software Foundation; only version 2 |
7 | * of the License. | |
91d76f53 DG |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <errno.h> | |
21 | #include <pthread.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
099e26bd | 24 | #include <string.h> |
aba8e916 DG |
25 | #include <sys/stat.h> |
26 | #include <sys/types.h> | |
099e26bd | 27 | #include <unistd.h> |
91d76f53 | 28 | |
0df502fd | 29 | #include <urcu/compiler.h> |
1e307fab | 30 | #include <lttngerr.h> |
48842b30 | 31 | #include <lttng-share.h> |
1e307fab | 32 | |
f6a9efaa | 33 | #include "hashtable.h" |
56fff090 | 34 | #include "ust-app.h" |
48842b30 | 35 | #include "ust-consumer.h" |
d80a6244 DG |
36 | #include "ust-ctl.h" |
37 | ||
55cc08a6 DG |
38 | /* |
39 | * Delete ust context safely. RCU read lock must be held before calling | |
40 | * this function. | |
41 | */ | |
42 | static | |
43 | void delete_ust_app_ctx(int sock, struct ust_app_ctx *ua_ctx) | |
44 | { | |
45 | if (ua_ctx->obj) { | |
46 | ustctl_release_object(sock, ua_ctx->obj); | |
47 | free(ua_ctx->obj); | |
48 | } | |
49 | free(ua_ctx); | |
50 | } | |
51 | ||
d80a6244 DG |
52 | /* |
53 | * Delete ust app event safely. RCU read lock must be held before calling | |
54 | * this function. | |
55 | */ | |
8b366481 DG |
56 | static |
57 | void delete_ust_app_event(int sock, struct ust_app_event *ua_event) | |
d80a6244 | 58 | { |
55cc08a6 DG |
59 | int ret; |
60 | struct cds_lfht_iter iter; | |
61 | struct ust_app_ctx *ua_ctx; | |
62 | ||
63 | cds_lfht_for_each_entry(ua_event->ctx, &iter, ua_ctx, node) { | |
64 | ret = hashtable_del(ua_event->ctx, &iter); | |
65 | assert(!ret); | |
66 | delete_ust_app_ctx(sock, ua_ctx); | |
67 | } | |
68 | ret = hashtable_destroy(ua_event->ctx); | |
69 | assert(!ret); | |
d80a6244 | 70 | |
edb67388 DG |
71 | if (ua_event->obj != NULL) { |
72 | ustctl_release_object(sock, ua_event->obj); | |
73 | free(ua_event->obj); | |
74 | } | |
d80a6244 DG |
75 | free(ua_event); |
76 | } | |
77 | ||
78 | /* | |
79 | * Delete ust app stream safely. RCU read lock must be held before calling | |
80 | * this function. | |
81 | */ | |
8b366481 DG |
82 | static |
83 | void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream) | |
d80a6244 | 84 | { |
8b366481 DG |
85 | if (stream->obj) { |
86 | ustctl_release_object(sock, stream->obj); | |
87 | free(stream->obj); | |
88 | } | |
84cd17c6 | 89 | free(stream); |
d80a6244 DG |
90 | } |
91 | ||
92 | /* | |
93 | * Delete ust app channel safely. RCU read lock must be held before calling | |
94 | * this function. | |
95 | */ | |
8b366481 DG |
96 | static |
97 | void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan) | |
d80a6244 DG |
98 | { |
99 | int ret; | |
100 | struct cds_lfht_iter iter; | |
101 | struct ust_app_event *ua_event; | |
55cc08a6 | 102 | struct ust_app_ctx *ua_ctx; |
d80a6244 DG |
103 | struct ltt_ust_stream *stream, *stmp; |
104 | ||
55cc08a6 | 105 | /* Wipe stream */ |
d80a6244 | 106 | cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) { |
84cd17c6 | 107 | cds_list_del(&stream->list); |
d80a6244 DG |
108 | delete_ust_app_stream(sock, stream); |
109 | } | |
110 | ||
55cc08a6 DG |
111 | /* Wipe context */ |
112 | cds_lfht_for_each_entry(ua_chan->ctx, &iter, ua_ctx, node) { | |
113 | ret = hashtable_del(ua_chan->ctx, &iter); | |
114 | assert(!ret); | |
115 | delete_ust_app_ctx(sock, ua_ctx); | |
116 | } | |
117 | ret = hashtable_destroy(ua_chan->ctx); | |
118 | assert(!ret); | |
d80a6244 | 119 | |
55cc08a6 | 120 | /* Wipe events */ |
d80a6244 | 121 | cds_lfht_for_each_entry(ua_chan->events, &iter, ua_event, node) { |
525b0740 MD |
122 | ret = hashtable_del(ua_chan->events, &iter); |
123 | assert(!ret); | |
d80a6244 DG |
124 | delete_ust_app_event(sock, ua_event); |
125 | } | |
d80a6244 | 126 | ret = hashtable_destroy(ua_chan->events); |
55cc08a6 | 127 | assert(!ret); |
edb67388 DG |
128 | |
129 | if (ua_chan->obj != NULL) { | |
130 | ustctl_release_object(sock, ua_chan->obj); | |
131 | free(ua_chan->obj); | |
132 | } | |
84cd17c6 | 133 | free(ua_chan); |
d80a6244 DG |
134 | } |
135 | ||
136 | /* | |
137 | * Delete ust app session safely. RCU read lock must be held before calling | |
138 | * this function. | |
139 | */ | |
8b366481 DG |
140 | static |
141 | void delete_ust_app_session(int sock, struct ust_app_session *ua_sess) | |
d80a6244 DG |
142 | { |
143 | int ret; | |
144 | struct cds_lfht_iter iter; | |
145 | struct ust_app_channel *ua_chan; | |
146 | ||
147 | if (ua_sess->metadata) { | |
8b366481 DG |
148 | if (ua_sess->metadata->stream_obj) { |
149 | ustctl_release_object(sock, ua_sess->metadata->stream_obj); | |
150 | free(ua_sess->metadata->stream_obj); | |
151 | } | |
152 | if (ua_sess->metadata->obj) { | |
153 | ustctl_release_object(sock, ua_sess->metadata->obj); | |
154 | free(ua_sess->metadata->obj); | |
155 | } | |
d80a6244 DG |
156 | } |
157 | ||
158 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { | |
525b0740 MD |
159 | ret = hashtable_del(ua_sess->channels, &iter); |
160 | assert(!ret); | |
d80a6244 DG |
161 | delete_ust_app_channel(sock, ua_chan); |
162 | } | |
d80a6244 | 163 | ret = hashtable_destroy(ua_sess->channels); |
8b366481 | 164 | assert(!ret); |
d80a6244 | 165 | |
aee6bafd MD |
166 | if (ua_sess->handle != -1) { |
167 | ustctl_release_handle(sock, ua_sess->handle); | |
168 | } | |
8b366481 | 169 | free(ua_sess); |
d80a6244 | 170 | } |
91d76f53 DG |
171 | |
172 | /* | |
284d8f55 DG |
173 | * Delete a traceable application structure from the global list. Never call |
174 | * this function outside of a call_rcu call. | |
91d76f53 | 175 | */ |
8b366481 DG |
176 | static |
177 | void delete_ust_app(struct ust_app *app) | |
91d76f53 | 178 | { |
8b366481 | 179 | int ret, sock; |
f6a9efaa DG |
180 | struct cds_lfht_node *node; |
181 | struct cds_lfht_iter iter; | |
284d8f55 | 182 | struct ust_app_session *ua_sess; |
44d3bd01 | 183 | |
f6a9efaa | 184 | rcu_read_lock(); |
44d3bd01 | 185 | |
f6a9efaa DG |
186 | /* Remove from key hash table */ |
187 | node = hashtable_lookup(ust_app_sock_key_map, | |
284d8f55 | 188 | (void *) ((unsigned long) app->key.sock), sizeof(void *), &iter); |
f6a9efaa | 189 | if (node == NULL) { |
284d8f55 DG |
190 | /* Not suppose to happen */ |
191 | ERR("UST app key %d not found in key hash table", app->key.sock); | |
d80a6244 | 192 | goto end; |
284d8f55 DG |
193 | } |
194 | ||
195 | ret = hashtable_del(ust_app_sock_key_map, &iter); | |
196 | if (ret) { | |
197 | ERR("UST app unable to delete app sock %d from key hash table", | |
198 | app->key.sock); | |
f6a9efaa | 199 | } else { |
284d8f55 DG |
200 | DBG2("UST app pair sock %d key %d deleted", |
201 | app->key.sock, app->key.pid); | |
f6a9efaa DG |
202 | } |
203 | ||
d80a6244 DG |
204 | /* Socket is already closed at this point */ |
205 | ||
206 | /* Delete ust app sessions info */ | |
6414a713 MD |
207 | sock = app->key.sock; |
208 | app->key.sock = -1; | |
d80a6244 | 209 | |
8b366481 | 210 | /* Wipe sessions */ |
284d8f55 | 211 | cds_lfht_for_each_entry(app->sessions, &iter, ua_sess, node) { |
525b0740 MD |
212 | ret = hashtable_del(app->sessions, &iter); |
213 | assert(!ret); | |
284d8f55 | 214 | delete_ust_app_session(app->key.sock, ua_sess); |
d80a6244 | 215 | } |
284d8f55 | 216 | ret = hashtable_destroy(app->sessions); |
8b366481 | 217 | assert(!ret); |
d80a6244 | 218 | |
6414a713 MD |
219 | /* |
220 | * Wait until we have removed the key from the sock hash table | |
221 | * before closing this socket, otherwise an application could | |
222 | * re-use the socket ID and race with the teardown, using the | |
223 | * same hash table entry. | |
224 | */ | |
225 | close(sock); | |
d80a6244 | 226 | |
284d8f55 DG |
227 | DBG2("UST app pid %d deleted", app->key.pid); |
228 | free(app); | |
d80a6244 | 229 | end: |
f6a9efaa | 230 | rcu_read_unlock(); |
099e26bd DG |
231 | } |
232 | ||
233 | /* | |
f6a9efaa | 234 | * URCU intermediate call to delete an UST app. |
099e26bd | 235 | */ |
8b366481 DG |
236 | static |
237 | void delete_ust_app_rcu(struct rcu_head *head) | |
099e26bd | 238 | { |
f6a9efaa DG |
239 | struct cds_lfht_node *node = |
240 | caa_container_of(head, struct cds_lfht_node, head); | |
241 | struct ust_app *app = | |
242 | caa_container_of(node, struct ust_app, node); | |
243 | ||
244 | delete_ust_app(app); | |
099e26bd DG |
245 | } |
246 | ||
8b366481 DG |
247 | /* |
248 | * Alloc new UST app session. | |
249 | */ | |
250 | static | |
251 | struct ust_app_session *alloc_ust_app_session(void) | |
252 | { | |
253 | struct ust_app_session *ua_sess; | |
254 | ||
255 | /* Init most of the default value by allocating and zeroing */ | |
256 | ua_sess = zmalloc(sizeof(struct ust_app_session)); | |
257 | if (ua_sess == NULL) { | |
258 | PERROR("malloc"); | |
259 | goto error; | |
260 | } | |
261 | ||
262 | ua_sess->handle = -1; | |
263 | ua_sess->channels = hashtable_new_str(0); | |
264 | ||
265 | return ua_sess; | |
266 | ||
267 | error: | |
268 | return NULL; | |
269 | } | |
270 | ||
271 | /* | |
272 | * Alloc new UST app channel. | |
273 | */ | |
274 | static | |
275 | struct ust_app_channel *alloc_ust_app_channel(char *name, | |
276 | struct lttng_ust_channel *attr) | |
277 | { | |
278 | struct ust_app_channel *ua_chan; | |
279 | ||
280 | /* Init most of the default value by allocating and zeroing */ | |
281 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); | |
282 | if (ua_chan == NULL) { | |
283 | PERROR("malloc"); | |
284 | goto error; | |
285 | } | |
286 | ||
287 | /* Setup channel name */ | |
288 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
289 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
290 | ||
291 | ua_chan->enabled = 1; | |
292 | ua_chan->handle = -1; | |
293 | ua_chan->ctx = hashtable_new(0); | |
294 | ua_chan->events = hashtable_new_str(0); | |
295 | hashtable_node_init(&ua_chan->node, (void *) ua_chan->name, | |
296 | strlen(ua_chan->name)); | |
297 | ||
298 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); | |
299 | ||
300 | /* Copy attributes */ | |
301 | if (attr) { | |
302 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
303 | } | |
304 | ||
305 | DBG3("UST app channel %s allocated", ua_chan->name); | |
306 | ||
307 | return ua_chan; | |
308 | ||
309 | error: | |
310 | return NULL; | |
311 | } | |
312 | ||
313 | /* | |
314 | * Alloc new UST app event. | |
315 | */ | |
316 | static | |
317 | struct ust_app_event *alloc_ust_app_event(char *name, | |
318 | struct lttng_ust_event *attr) | |
319 | { | |
320 | struct ust_app_event *ua_event; | |
321 | ||
322 | /* Init most of the default value by allocating and zeroing */ | |
323 | ua_event = zmalloc(sizeof(struct ust_app_event)); | |
324 | if (ua_event == NULL) { | |
325 | PERROR("malloc"); | |
326 | goto error; | |
327 | } | |
328 | ||
329 | ua_event->enabled = 1; | |
330 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
331 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
332 | ua_event->ctx = hashtable_new(0); | |
333 | hashtable_node_init(&ua_event->node, (void *) ua_event->name, | |
334 | strlen(ua_event->name)); | |
335 | ||
336 | /* Copy attributes */ | |
337 | if (attr) { | |
338 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
339 | } | |
340 | ||
341 | DBG3("UST app event %s allocated", ua_event->name); | |
342 | ||
343 | return ua_event; | |
344 | ||
345 | error: | |
346 | return NULL; | |
347 | } | |
348 | ||
349 | /* | |
350 | * Alloc new UST app context. | |
351 | */ | |
352 | static | |
353 | struct ust_app_ctx *alloc_ust_app_ctx(struct lttng_ust_context *uctx) | |
354 | { | |
355 | struct ust_app_ctx *ua_ctx; | |
356 | ||
357 | ua_ctx = zmalloc(sizeof(struct ust_app_ctx)); | |
358 | if (ua_ctx == NULL) { | |
359 | goto error; | |
360 | } | |
361 | ||
362 | if (uctx) { | |
363 | memcpy(&ua_ctx->ctx, uctx, sizeof(ua_ctx->ctx)); | |
364 | } | |
365 | ||
366 | DBG3("UST app context %d allocated", ua_ctx->ctx.ctx); | |
367 | ||
368 | error: | |
369 | return ua_ctx; | |
370 | } | |
371 | ||
099e26bd | 372 | /* |
421cb601 DG |
373 | * Find an ust_app using the sock and return it. RCU read side lock must be |
374 | * held before calling this helper function. | |
099e26bd | 375 | */ |
8b366481 DG |
376 | static |
377 | struct ust_app *find_app_by_sock(int sock) | |
099e26bd | 378 | { |
f6a9efaa DG |
379 | struct cds_lfht_node *node; |
380 | struct ust_app_key *key; | |
381 | struct cds_lfht_iter iter; | |
f6a9efaa | 382 | |
f6a9efaa DG |
383 | node = hashtable_lookup(ust_app_sock_key_map, |
384 | (void *)((unsigned long) sock), sizeof(void *), &iter); | |
385 | if (node == NULL) { | |
386 | DBG2("UST app find by sock %d key not found", sock); | |
f6a9efaa DG |
387 | goto error; |
388 | } | |
389 | ||
390 | key = caa_container_of(node, struct ust_app_key, node); | |
391 | ||
392 | node = hashtable_lookup(ust_app_ht, | |
393 | (void *)((unsigned long) key->pid), sizeof(void *), &iter); | |
394 | if (node == NULL) { | |
395 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
396 | goto error; |
397 | } | |
f6a9efaa DG |
398 | return caa_container_of(node, struct ust_app, node); |
399 | ||
400 | error: | |
401 | return NULL; | |
099e26bd DG |
402 | } |
403 | ||
55cc08a6 DG |
404 | /* |
405 | * Create the channel context on the tracer. | |
406 | */ | |
407 | static | |
408 | int create_ust_channel_context(struct ust_app_channel *ua_chan, | |
409 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
410 | { | |
411 | int ret; | |
412 | ||
413 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
414 | ua_chan->obj, &ua_ctx->obj); | |
415 | if (ret < 0) { | |
416 | goto error; | |
417 | } | |
418 | ||
419 | ua_ctx->handle = ua_ctx->obj->handle; | |
420 | ||
421 | DBG2("UST app context added to channel %s successfully", ua_chan->name); | |
422 | ||
423 | error: | |
424 | return ret; | |
425 | } | |
426 | ||
427 | /* | |
428 | * Create the event context on the tracer. | |
429 | */ | |
430 | static | |
431 | int create_ust_event_context(struct ust_app_event *ua_event, | |
432 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
433 | { | |
434 | int ret; | |
435 | ||
436 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
437 | ua_event->obj, &ua_ctx->obj); | |
438 | if (ret < 0) { | |
439 | goto error; | |
440 | } | |
441 | ||
442 | ua_ctx->handle = ua_ctx->obj->handle; | |
443 | ||
444 | DBG2("UST app context added to event %s successfully", ua_event->name); | |
445 | ||
446 | error: | |
447 | return ret; | |
448 | } | |
449 | ||
9730260e DG |
450 | /* |
451 | * Disable the specified event on to UST tracer for the UST session. | |
452 | */ | |
453 | static int disable_ust_event(struct ust_app *app, | |
454 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
455 | { | |
456 | int ret; | |
457 | ||
458 | ret = ustctl_disable(app->key.sock, ua_event->obj); | |
459 | if (ret < 0) { | |
460 | ERR("UST app event %s disable failed for app (pid: %d) " | |
461 | "and session handle %d with ret %d", | |
462 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
463 | goto error; | |
464 | } | |
465 | ||
466 | DBG2("UST app event %s disabled successfully for app (pid: %d)", | |
467 | ua_event->attr.name, app->key.pid); | |
468 | ||
469 | error: | |
470 | return ret; | |
471 | } | |
472 | ||
78f0bacd DG |
473 | /* |
474 | * Disable the specified channel on to UST tracer for the UST session. | |
475 | */ | |
476 | static int disable_ust_channel(struct ust_app *app, | |
477 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
478 | { | |
479 | int ret; | |
480 | ||
481 | ret = ustctl_disable(app->key.sock, ua_chan->obj); | |
482 | if (ret < 0) { | |
483 | ERR("UST app channel %s disable failed for app (pid: %d) " | |
484 | "and session handle %d with ret %d", | |
485 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
486 | goto error; | |
487 | } | |
488 | ||
78f0bacd DG |
489 | DBG2("UST app channel %s disabled successfully for app (pid: %d)", |
490 | ua_chan->name, app->key.pid); | |
491 | ||
492 | error: | |
493 | return ret; | |
494 | } | |
495 | ||
496 | /* | |
497 | * Enable the specified channel on to UST tracer for the UST session. | |
498 | */ | |
499 | static int enable_ust_channel(struct ust_app *app, | |
500 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
501 | { | |
502 | int ret; | |
503 | ||
504 | ret = ustctl_enable(app->key.sock, ua_chan->obj); | |
505 | if (ret < 0) { | |
506 | ERR("UST app channel %s enable failed for app (pid: %d) " | |
507 | "and session handle %d with ret %d", | |
508 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
509 | goto error; | |
510 | } | |
511 | ||
512 | ua_chan->enabled = 1; | |
513 | ||
514 | DBG2("UST app channel %s enabled successfully for app (pid: %d)", | |
515 | ua_chan->name, app->key.pid); | |
516 | ||
517 | error: | |
518 | return ret; | |
519 | } | |
520 | ||
edb67388 DG |
521 | /* |
522 | * Enable the specified event on to UST tracer for the UST session. | |
523 | */ | |
524 | static int enable_ust_event(struct ust_app *app, | |
525 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
526 | { | |
527 | int ret; | |
528 | ||
529 | ret = ustctl_enable(app->key.sock, ua_event->obj); | |
530 | if (ret < 0) { | |
531 | ERR("UST app event %s enable failed for app (pid: %d) " | |
532 | "and session handle %d with ret %d", | |
533 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
534 | goto error; | |
535 | } | |
536 | ||
537 | DBG2("UST app event %s enabled successfully for app (pid: %d)", | |
538 | ua_event->attr.name, app->key.pid); | |
539 | ||
540 | error: | |
541 | return ret; | |
542 | } | |
543 | ||
099e26bd | 544 | /* |
5b4a0ec0 | 545 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 546 | */ |
5b4a0ec0 DG |
547 | static int open_ust_metadata(struct ust_app *app, |
548 | struct ust_app_session *ua_sess) | |
0177d773 | 549 | { |
5b4a0ec0 DG |
550 | int ret; |
551 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 552 | |
5b4a0ec0 DG |
553 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
554 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
555 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
556 | uattr.switch_timer_interval = | |
557 | ua_sess->metadata->attr.switch_timer_interval; | |
558 | uattr.read_timer_interval = | |
559 | ua_sess->metadata->attr.read_timer_interval; | |
560 | uattr.output = ua_sess->metadata->attr.output; | |
561 | ||
562 | /* UST tracer metadata creation */ | |
563 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
564 | &ua_sess->metadata->obj); | |
565 | if (ret < 0) { | |
566 | ERR("UST app open metadata failed for app pid:%d", | |
567 | app->key.pid); | |
f6a9efaa | 568 | goto error; |
0177d773 | 569 | } |
f6a9efaa | 570 | |
6d3686da DG |
571 | ua_sess->metadata->handle = ua_sess->metadata->obj->handle; |
572 | ||
f6a9efaa | 573 | error: |
5b4a0ec0 | 574 | return ret; |
91d76f53 DG |
575 | } |
576 | ||
577 | /* | |
5b4a0ec0 | 578 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 579 | */ |
5b4a0ec0 DG |
580 | static int create_ust_stream(struct ust_app *app, |
581 | struct ust_app_session *ua_sess) | |
91d76f53 | 582 | { |
5b4a0ec0 | 583 | int ret; |
421cb601 | 584 | |
5b4a0ec0 DG |
585 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, |
586 | &ua_sess->metadata->stream_obj); | |
587 | if (ret < 0) { | |
588 | ERR("UST create metadata stream failed"); | |
421cb601 | 589 | goto error; |
91d76f53 | 590 | } |
421cb601 | 591 | |
421cb601 | 592 | error: |
5b4a0ec0 | 593 | return ret; |
91d76f53 DG |
594 | } |
595 | ||
b551a063 | 596 | /* |
5b4a0ec0 | 597 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 598 | */ |
5b4a0ec0 DG |
599 | static int create_ust_channel(struct ust_app *app, |
600 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 601 | { |
5b4a0ec0 | 602 | int ret; |
b551a063 | 603 | |
5b4a0ec0 DG |
604 | /* TODO: remove cast and use lttng-ust-abi.h */ |
605 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
606 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); | |
607 | if (ret < 0) { | |
608 | DBG("Error creating channel %s for app (pid: %d, sock: %d) " | |
609 | "and session handle %d with ret %d", | |
610 | ua_chan->name, app->key.pid, app->key.sock, | |
611 | ua_sess->handle, ret); | |
b551a063 DG |
612 | goto error; |
613 | } | |
614 | ||
5b4a0ec0 DG |
615 | ua_chan->handle = ua_chan->obj->handle; |
616 | ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; | |
617 | ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; | |
618 | ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; | |
b551a063 | 619 | |
5b4a0ec0 DG |
620 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
621 | ua_chan->name, app->key.pid, app->key.sock); | |
b551a063 | 622 | |
8535a6d9 DG |
623 | /* If channel is not enabled, disable it on the tracer */ |
624 | if (!ua_chan->enabled) { | |
625 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
626 | if (ret < 0) { | |
627 | goto error; | |
628 | } | |
629 | } | |
630 | ||
b551a063 DG |
631 | error: |
632 | return ret; | |
633 | } | |
634 | ||
91d76f53 | 635 | /* |
5b4a0ec0 | 636 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 637 | */ |
edb67388 DG |
638 | static |
639 | int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess, | |
640 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event) | |
91d76f53 | 641 | { |
5b4a0ec0 | 642 | int ret = 0; |
284d8f55 | 643 | |
5b4a0ec0 DG |
644 | /* Create UST event on tracer */ |
645 | ret = ustctl_create_event(app->key.sock, &ua_event->attr, ua_chan->obj, | |
646 | &ua_event->obj); | |
647 | if (ret < 0) { | |
648 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
649 | ua_event->attr.name, app->key.pid, ret); | |
650 | goto error; | |
91d76f53 | 651 | } |
f6a9efaa | 652 | |
5b4a0ec0 | 653 | ua_event->handle = ua_event->obj->handle; |
284d8f55 | 654 | |
5b4a0ec0 DG |
655 | DBG2("UST app event %s created successfully for pid:%d", |
656 | ua_event->attr.name, app->key.pid); | |
f6a9efaa | 657 | |
8535a6d9 DG |
658 | /* If event not enabled, disable it on the tracer */ |
659 | if (!ua_event->enabled) { | |
660 | ret = disable_ust_event(app, ua_sess, ua_event); | |
661 | if (ret < 0) { | |
662 | goto error; | |
663 | } | |
664 | } | |
665 | ||
5b4a0ec0 DG |
666 | error: |
667 | return ret; | |
91d76f53 | 668 | } |
48842b30 | 669 | |
5b4a0ec0 DG |
670 | /* |
671 | * Copy data between an UST app event and a LTT event. | |
672 | */ | |
421cb601 | 673 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
674 | struct ltt_ust_event *uevent) |
675 | { | |
55cc08a6 DG |
676 | struct cds_lfht_iter iter; |
677 | struct ltt_ust_context *uctx; | |
678 | struct ust_app_ctx *ua_ctx; | |
679 | ||
48842b30 DG |
680 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); |
681 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
682 | ||
5b4a0ec0 DG |
683 | /* Copy event attributes */ |
684 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
685 | ||
55cc08a6 DG |
686 | cds_lfht_for_each_entry(uevent->ctx, &iter, uctx, node) { |
687 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); | |
688 | if (ua_ctx == NULL) { | |
689 | continue; | |
690 | } | |
691 | hashtable_node_init(&ua_ctx->node, | |
692 | (void *)((unsigned long) ua_ctx->ctx.ctx), sizeof(void *)); | |
693 | hashtable_add_unique(ua_event->ctx, &ua_ctx->node); | |
694 | } | |
48842b30 DG |
695 | } |
696 | ||
5b4a0ec0 DG |
697 | /* |
698 | * Copy data between an UST app channel and a LTT channel. | |
699 | */ | |
421cb601 | 700 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
701 | struct ltt_ust_channel *uchan) |
702 | { | |
703 | struct cds_lfht_iter iter; | |
5b4a0ec0 | 704 | struct cds_lfht_node *ua_event_node; |
48842b30 | 705 | struct ltt_ust_event *uevent; |
55cc08a6 | 706 | struct ltt_ust_context *uctx; |
48842b30 | 707 | struct ust_app_event *ua_event; |
55cc08a6 | 708 | struct ust_app_ctx *ua_ctx; |
48842b30 | 709 | |
421cb601 | 710 | DBG2("Shadow copy of UST app channel %s", ua_chan->name); |
48842b30 DG |
711 | |
712 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
713 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
714 | /* Copy event attributes */ |
715 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 | 716 | |
55cc08a6 DG |
717 | cds_lfht_for_each_entry(uchan->ctx, &iter, uctx, node) { |
718 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); | |
719 | if (ua_ctx == NULL) { | |
720 | continue; | |
721 | } | |
722 | hashtable_node_init(&ua_ctx->node, | |
723 | (void *)((unsigned long) ua_ctx->ctx.ctx), sizeof(void *)); | |
724 | hashtable_add_unique(ua_chan->ctx, &ua_ctx->node); | |
725 | } | |
48842b30 | 726 | |
421cb601 | 727 | /* Copy all events from ltt ust channel to ust app channel */ |
5b4a0ec0 | 728 | cds_lfht_for_each_entry(uchan->events, &iter, uevent, node) { |
ba767faf MD |
729 | struct cds_lfht_iter uiter; |
730 | ||
48842b30 | 731 | ua_event_node = hashtable_lookup(ua_chan->events, |
ba767faf MD |
732 | (void *) uevent->attr.name, strlen(uevent->attr.name), |
733 | &uiter); | |
48842b30 | 734 | if (ua_event_node == NULL) { |
421cb601 | 735 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 736 | uevent->attr.name); |
284d8f55 | 737 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 738 | if (ua_event == NULL) { |
5b4a0ec0 | 739 | continue; |
48842b30 | 740 | } |
421cb601 | 741 | shadow_copy_event(ua_event, uevent); |
48842b30 | 742 | hashtable_add_unique(ua_chan->events, &ua_event->node); |
48842b30 | 743 | } |
48842b30 DG |
744 | } |
745 | ||
421cb601 | 746 | DBG3("Shadow copy channel done"); |
48842b30 DG |
747 | } |
748 | ||
5b4a0ec0 DG |
749 | /* |
750 | * Copy data between a UST app session and a regular LTT session. | |
751 | */ | |
421cb601 | 752 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
477d7741 MD |
753 | struct ltt_ust_session *usess, |
754 | struct ust_app *app) | |
48842b30 | 755 | { |
5b4a0ec0 | 756 | struct cds_lfht_node *ua_chan_node; |
48842b30 DG |
757 | struct cds_lfht_iter iter; |
758 | struct ltt_ust_channel *uchan; | |
759 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
760 | time_t rawtime; |
761 | struct tm *timeinfo; | |
762 | char datetime[16]; | |
763 | int ret; | |
764 | ||
765 | /* Get date and time for unique app path */ | |
766 | time(&rawtime); | |
767 | timeinfo = localtime(&rawtime); | |
768 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 769 | |
421cb601 | 770 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 | 771 | |
a991f516 | 772 | ua_sess->id = usess->id; |
6df2e2c9 MD |
773 | ua_sess->uid = usess->uid; |
774 | ua_sess->gid = usess->gid; | |
48842b30 | 775 | |
477d7741 MD |
776 | ret = snprintf(ua_sess->path, PATH_MAX, |
777 | "%s/%s-%d-%s", | |
778 | usess->pathname, app->name, app->key.pid, | |
779 | datetime); | |
780 | if (ret < 0) { | |
781 | PERROR("asprintf UST shadow copy session"); | |
782 | /* TODO: We cannot return an error from here.. */ | |
783 | assert(0); | |
784 | } | |
785 | ||
48842b30 DG |
786 | /* TODO: support all UST domain */ |
787 | ||
788 | /* Iterate over all channels in global domain. */ | |
5b4a0ec0 DG |
789 | cds_lfht_for_each_entry(usess->domain_global.channels, &iter, |
790 | uchan, node) { | |
ba767faf MD |
791 | struct cds_lfht_iter uiter; |
792 | ||
48842b30 | 793 | ua_chan_node = hashtable_lookup(ua_sess->channels, |
ba767faf MD |
794 | (void *)uchan->name, strlen(uchan->name), |
795 | &uiter); | |
5b4a0ec0 DG |
796 | if (ua_chan_node != NULL) { |
797 | continue; | |
798 | } | |
421cb601 | 799 | |
5b4a0ec0 DG |
800 | DBG2("Channel %s not found on shadow session copy, creating it", |
801 | uchan->name); | |
802 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
803 | if (ua_chan == NULL) { | |
804 | /* malloc failed... continuing */ | |
805 | continue; | |
48842b30 DG |
806 | } |
807 | ||
5b4a0ec0 DG |
808 | shadow_copy_channel(ua_chan, uchan); |
809 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
48842b30 DG |
810 | } |
811 | } | |
812 | ||
78f0bacd DG |
813 | /* |
814 | * Lookup sesison wrapper. | |
815 | */ | |
84cd17c6 MD |
816 | static |
817 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
818 | struct ust_app *app, struct cds_lfht_iter *iter) | |
819 | { | |
820 | /* Get right UST app session from app */ | |
821 | (void) hashtable_lookup(app->sessions, | |
a991f516 | 822 | (void *) ((unsigned long) usess->id), sizeof(void *), |
84cd17c6 MD |
823 | iter); |
824 | } | |
825 | ||
421cb601 DG |
826 | /* |
827 | * Return ust app session from the app session hashtable using the UST session | |
a991f516 | 828 | * id. |
421cb601 | 829 | */ |
48842b30 DG |
830 | static struct ust_app_session *lookup_session_by_app( |
831 | struct ltt_ust_session *usess, struct ust_app *app) | |
832 | { | |
833 | struct cds_lfht_iter iter; | |
834 | struct cds_lfht_node *node; | |
835 | ||
84cd17c6 MD |
836 | __lookup_session_by_app(usess, app, &iter); |
837 | node = hashtable_iter_get_node(&iter); | |
48842b30 DG |
838 | if (node == NULL) { |
839 | goto error; | |
840 | } | |
841 | ||
842 | return caa_container_of(node, struct ust_app_session, node); | |
843 | ||
844 | error: | |
845 | return NULL; | |
846 | } | |
847 | ||
421cb601 DG |
848 | /* |
849 | * Create a UST session onto the tracer of app and add it the session | |
850 | * hashtable. | |
851 | * | |
852 | * Return ust app session or NULL on error. | |
853 | */ | |
854 | static struct ust_app_session *create_ust_app_session( | |
855 | struct ltt_ust_session *usess, struct ust_app *app) | |
856 | { | |
857 | int ret; | |
858 | struct ust_app_session *ua_sess; | |
859 | ||
860 | ua_sess = lookup_session_by_app(usess, app); | |
861 | if (ua_sess == NULL) { | |
a991f516 MD |
862 | DBG2("UST app pid: %d session id %d not found, creating it", |
863 | app->key.pid, usess->id); | |
421cb601 DG |
864 | ua_sess = alloc_ust_app_session(); |
865 | if (ua_sess == NULL) { | |
866 | /* Only malloc can failed so something is really wrong */ | |
867 | goto error; | |
868 | } | |
477d7741 | 869 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
870 | } |
871 | ||
872 | if (ua_sess->handle == -1) { | |
873 | ret = ustctl_create_session(app->key.sock); | |
874 | if (ret < 0) { | |
875 | ERR("Error creating session for app pid %d, sock %d", | |
876 | app->key.pid, app->key.sock); | |
877 | /* TODO: free() ua_sess */ | |
878 | goto error; | |
879 | } | |
880 | ||
881 | DBG2("UST app ustctl create session handle %d", ret); | |
882 | ua_sess->handle = ret; | |
883 | ||
884 | /* Add ust app session to app's HT */ | |
885 | hashtable_node_init(&ua_sess->node, | |
a991f516 | 886 | (void *)((unsigned long) ua_sess->id), sizeof(void *)); |
421cb601 DG |
887 | hashtable_add_unique(app->sessions, &ua_sess->node); |
888 | ||
889 | DBG2("UST app session created successfully with handle %d", ret); | |
890 | } | |
891 | ||
892 | return ua_sess; | |
893 | ||
894 | error: | |
895 | return NULL; | |
896 | } | |
897 | ||
55cc08a6 DG |
898 | /* |
899 | * Create a context for the channel on the tracer. | |
900 | */ | |
901 | static | |
902 | int create_ust_app_channel_context(struct ust_app_session *ua_sess, | |
903 | struct ust_app_channel *ua_chan, struct lttng_ust_context *uctx, | |
904 | struct ust_app *app) | |
905 | { | |
906 | int ret = 0; | |
907 | struct cds_lfht_iter iter; | |
908 | struct cds_lfht_node *node; | |
909 | struct ust_app_ctx *ua_ctx; | |
910 | ||
911 | DBG2("UST app adding context to channel %s", ua_chan->name); | |
912 | ||
913 | node = hashtable_lookup(ua_chan->ctx, (void *)((unsigned long)uctx->ctx), | |
914 | sizeof(void *), &iter); | |
915 | if (node != NULL) { | |
916 | ret = -EEXIST; | |
917 | goto error; | |
918 | } | |
919 | ||
920 | ua_ctx = alloc_ust_app_ctx(uctx); | |
921 | if (ua_ctx == NULL) { | |
922 | /* malloc failed */ | |
923 | ret = -1; | |
924 | goto error; | |
925 | } | |
926 | ||
927 | hashtable_node_init(&ua_ctx->node, | |
928 | (void *)((unsigned long) ua_ctx->ctx.ctx), sizeof(void *)); | |
929 | hashtable_add_unique(ua_chan->ctx, &ua_ctx->node); | |
930 | ||
931 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
932 | if (ret < 0) { | |
933 | goto error; | |
934 | } | |
935 | ||
936 | error: | |
937 | return ret; | |
938 | } | |
939 | ||
940 | /* | |
941 | * Create an UST context and enable it for the event on the tracer. | |
942 | */ | |
943 | static | |
944 | int create_ust_app_event_context(struct ust_app_session *ua_sess, | |
945 | struct ust_app_event *ua_event, struct lttng_ust_context *uctx, | |
946 | struct ust_app *app) | |
947 | { | |
948 | int ret = 0; | |
949 | struct cds_lfht_iter iter; | |
950 | struct cds_lfht_node *node; | |
951 | struct ust_app_ctx *ua_ctx; | |
952 | ||
953 | DBG2("UST app adding context to event %s", ua_event->name); | |
954 | ||
955 | node = hashtable_lookup(ua_event->ctx, (void *)((unsigned long)uctx->ctx), | |
956 | sizeof(void *), &iter); | |
957 | if (node != NULL) { | |
958 | ret = -EEXIST; | |
959 | goto error; | |
960 | } | |
961 | ||
962 | ua_ctx = alloc_ust_app_ctx(uctx); | |
963 | if (ua_ctx == NULL) { | |
964 | /* malloc failed */ | |
965 | ret = -1; | |
966 | goto error; | |
967 | } | |
968 | ||
969 | hashtable_node_init(&ua_ctx->node, | |
970 | (void *)((unsigned long) ua_ctx->ctx.ctx), sizeof(void *)); | |
971 | hashtable_add_unique(ua_event->ctx, &ua_ctx->node); | |
972 | ||
973 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
974 | if (ret < 0) { | |
975 | goto error; | |
976 | } | |
977 | ||
978 | error: | |
979 | return ret; | |
980 | } | |
981 | ||
edb67388 DG |
982 | /* |
983 | * Enable on the tracer side a ust app event for the session and channel. | |
984 | */ | |
985 | static | |
986 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 987 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
988 | { |
989 | int ret; | |
990 | ||
991 | ret = enable_ust_event(app, ua_sess, ua_event); | |
992 | if (ret < 0) { | |
993 | goto error; | |
994 | } | |
995 | ||
996 | ua_event->enabled = 1; | |
997 | ||
998 | error: | |
999 | return ret; | |
1000 | } | |
1001 | ||
9730260e DG |
1002 | /* |
1003 | * Disable on the tracer side a ust app event for the session and channel. | |
1004 | */ | |
1005 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
7f79d3a1 | 1006 | struct ust_app_event *ua_event, struct ust_app *app) |
9730260e DG |
1007 | { |
1008 | int ret; | |
1009 | ||
1010 | ret = disable_ust_event(app, ua_sess, ua_event); | |
1011 | if (ret < 0) { | |
1012 | goto error; | |
1013 | } | |
1014 | ||
1015 | ua_event->enabled = 0; | |
1016 | ||
1017 | error: | |
1018 | return ret; | |
1019 | } | |
1020 | ||
78f0bacd DG |
1021 | /* |
1022 | * Lookup ust app channel for session and disable it on the tracer side. | |
1023 | */ | |
8535a6d9 DG |
1024 | static |
1025 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
1026 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 1027 | { |
8535a6d9 | 1028 | int ret; |
78f0bacd DG |
1029 | |
1030 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
1031 | if (ret < 0) { | |
1032 | goto error; | |
1033 | } | |
1034 | ||
8535a6d9 DG |
1035 | ua_chan->enabled = 0; |
1036 | ||
78f0bacd DG |
1037 | error: |
1038 | return ret; | |
1039 | } | |
1040 | ||
1041 | /* | |
1042 | * Lookup ust app channel for session and enable it on the tracer side. | |
1043 | */ | |
1044 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
1045 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
1046 | { | |
1047 | int ret = 0; | |
1048 | struct cds_lfht_iter iter; | |
1049 | struct cds_lfht_node *ua_chan_node; | |
1050 | struct ust_app_channel *ua_chan; | |
1051 | ||
1052 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
1053 | (void *)uchan->name, strlen(uchan->name), &iter); | |
1054 | if (ua_chan_node == NULL) { | |
a991f516 MD |
1055 | DBG2("Unable to find channel %s in ust session id %u", |
1056 | uchan->name, ua_sess->id); | |
78f0bacd DG |
1057 | goto error; |
1058 | } | |
1059 | ||
1060 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1061 | ||
1062 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
1063 | if (ret < 0) { | |
1064 | goto error; | |
1065 | } | |
1066 | ||
1067 | error: | |
1068 | return ret; | |
1069 | } | |
1070 | ||
284d8f55 | 1071 | /* |
5b4a0ec0 | 1072 | * Create UST app channel and create it on the tracer. |
284d8f55 | 1073 | */ |
5b4a0ec0 DG |
1074 | static struct ust_app_channel *create_ust_app_channel( |
1075 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
1076 | struct ust_app *app) | |
1077 | { | |
1078 | int ret = 0; | |
1079 | struct cds_lfht_iter iter; | |
1080 | struct cds_lfht_node *ua_chan_node; | |
1081 | struct ust_app_channel *ua_chan; | |
1082 | ||
1083 | /* Lookup channel in the ust app session */ | |
1084 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
1085 | (void *)uchan->name, strlen(uchan->name), &iter); | |
1086 | if (ua_chan_node == NULL) { | |
a991f516 MD |
1087 | DBG2("Unable to find channel %s in ust session id %u", |
1088 | uchan->name, ua_sess->id); | |
5b4a0ec0 DG |
1089 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); |
1090 | if (ua_chan == NULL) { | |
1091 | goto error; | |
1092 | } | |
1093 | shadow_copy_channel(ua_chan, uchan); | |
1094 | ||
1095 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
1096 | } else { | |
1097 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1098 | } | |
1099 | ||
1100 | ret = create_ust_channel(app, ua_sess, ua_chan); | |
1101 | if (ret < 0) { | |
1102 | goto error; | |
1103 | } | |
1104 | ||
1105 | return ua_chan; | |
1106 | ||
1107 | error: | |
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; |
5b4a0ec0 DG |
1120 | struct cds_lfht_iter iter; |
1121 | struct cds_lfht_node *ua_event_node; | |
1122 | struct ust_app_event *ua_event; | |
284d8f55 | 1123 | |
5b4a0ec0 DG |
1124 | /* Get event node */ |
1125 | ua_event_node = hashtable_lookup(ua_chan->events, | |
1126 | (void *)uevent->attr.name, strlen(uevent->attr.name), &iter); | |
edb67388 DG |
1127 | if (ua_event_node != NULL) { |
1128 | ERR("UST app event %s already exist. Stopping creation.", | |
1129 | uevent->attr.name); | |
1130 | goto end; | |
1131 | } | |
5b4a0ec0 | 1132 | |
edb67388 DG |
1133 | /* Does not exist so create one */ |
1134 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
1135 | if (ua_event == NULL) { | |
1136 | /* Only malloc can failed so something is really wrong */ | |
1137 | ret = -ENOMEM; | |
1138 | goto error; | |
5b4a0ec0 | 1139 | } |
edb67388 | 1140 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 1141 | |
edb67388 | 1142 | /* Create it on the tracer side */ |
5b4a0ec0 | 1143 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 1144 | if (ret < 0) { |
e5abf1bf | 1145 | rcu_read_lock(); |
edb67388 | 1146 | delete_ust_app_event(app->key.sock, ua_event); |
e5abf1bf | 1147 | rcu_read_unlock(); |
284d8f55 DG |
1148 | goto error; |
1149 | } | |
1150 | ||
8535a6d9 DG |
1151 | ua_event->enabled = 1; |
1152 | ||
edb67388 | 1153 | hashtable_add_unique(ua_chan->events, &ua_event->node); |
284d8f55 | 1154 | |
7f79d3a1 DG |
1155 | DBG2("UST app create event %s for PID %d completed", |
1156 | ua_event->name, app->key.pid); | |
1157 | ||
edb67388 | 1158 | end: |
5b4a0ec0 | 1159 | error: |
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; | |
67e40797 | 1170 | mode_t old_umask; |
5b4a0ec0 DG |
1171 | |
1172 | if (ua_sess->metadata == NULL) { | |
1173 | /* Allocate UST metadata */ | |
1174 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
1175 | if (ua_sess->metadata == NULL) { | |
1176 | ERR("UST app session %d creating metadata failed", | |
1177 | ua_sess->handle); | |
1178 | goto error; | |
1179 | } | |
1180 | ||
1181 | ret = open_ust_metadata(app, ua_sess); | |
1182 | if (ret < 0) { | |
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 | ||
67e40797 | 1196 | old_umask = umask(0); |
477d7741 | 1197 | ret = mkdir(ua_sess->path, S_IRWXU | S_IRWXG); |
5b4a0ec0 DG |
1198 | if (ret < 0) { |
1199 | PERROR("mkdir UST metadata"); | |
1200 | goto error; | |
1201 | } | |
6df2e2c9 MD |
1202 | ret = chown(ua_sess->path, ua_sess->uid, ua_sess->gid); |
1203 | if (ret < 0) { | |
1204 | ERR("Unable to change owner of %s", ua_sess->path); | |
1205 | perror("chown"); | |
1206 | } | |
67e40797 | 1207 | umask(old_umask); |
5b4a0ec0 | 1208 | |
477d7741 MD |
1209 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
1210 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
1211 | if (ret < 0) { |
1212 | PERROR("asprintf UST create stream"); | |
1213 | goto error; | |
1214 | } | |
1215 | ||
1216 | DBG2("UST metadata stream object created for app pid %d", | |
1217 | app->key.pid); | |
1218 | } else { | |
1219 | ERR("Attempting to create stream without metadata opened"); | |
1220 | goto error; | |
1221 | } | |
1222 | ||
1223 | return 0; | |
1224 | ||
1225 | error: | |
1226 | return -1; | |
1227 | } | |
1228 | ||
1229 | /* | |
1230 | * Return pointer to traceable apps list. | |
1231 | */ | |
1232 | struct cds_lfht *ust_app_get_ht(void) | |
1233 | { | |
1234 | return ust_app_ht; | |
1235 | } | |
1236 | ||
1237 | /* | |
1238 | * Return ust app pointer or NULL if not found. | |
1239 | */ | |
1240 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
1241 | { | |
1242 | struct cds_lfht_node *node; | |
1243 | struct cds_lfht_iter iter; | |
1244 | ||
1245 | rcu_read_lock(); | |
1246 | node = hashtable_lookup(ust_app_ht, | |
1247 | (void *)((unsigned long) pid), sizeof(void *), &iter); | |
1248 | if (node == NULL) { | |
1249 | DBG2("UST app no found with pid %d", pid); | |
1250 | goto error; | |
1251 | } | |
1252 | rcu_read_unlock(); | |
1253 | ||
1254 | DBG2("Found UST app by pid %d", pid); | |
1255 | ||
1256 | return caa_container_of(node, struct ust_app, node); | |
1257 | ||
1258 | error: | |
1259 | rcu_read_unlock(); | |
1260 | return NULL; | |
1261 | } | |
1262 | ||
1263 | /* | |
1264 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
1265 | * add it to the global traceable app list. | |
1266 | * | |
0df502fd MD |
1267 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
1268 | * bitness is not supported. | |
5b4a0ec0 DG |
1269 | */ |
1270 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
1271 | { | |
1272 | struct ust_app *lta; | |
1273 | ||
7753dea8 MD |
1274 | if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL) |
1275 | || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) { | |
f943b0fb | 1276 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1277 | "%d-bit long, but no consumerd for this long size is available.\n", |
1278 | msg->name, msg->pid, msg->bits_per_long); | |
88ff5b7f | 1279 | close(sock); |
0df502fd MD |
1280 | return -EINVAL; |
1281 | } | |
5b4a0ec0 DG |
1282 | lta = zmalloc(sizeof(struct ust_app)); |
1283 | if (lta == NULL) { | |
1284 | PERROR("malloc"); | |
1285 | return -ENOMEM; | |
1286 | } | |
1287 | ||
1288 | lta->ppid = msg->ppid; | |
1289 | lta->uid = msg->uid; | |
1290 | lta->gid = msg->gid; | |
7753dea8 | 1291 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1292 | lta->v_major = msg->major; |
1293 | lta->v_minor = msg->minor; | |
1294 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1295 | lta->name[16] = '\0'; | |
1296 | lta->sessions = hashtable_new(0); | |
1297 | ||
1298 | /* Set key map */ | |
1299 | lta->key.pid = msg->pid; | |
1300 | hashtable_node_init(<a->node, (void *)((unsigned long)lta->key.pid), | |
1301 | sizeof(void *)); | |
1302 | lta->key.sock = sock; | |
1303 | hashtable_node_init(<a->key.node, (void *)((unsigned long)lta->key.sock), | |
1304 | sizeof(void *)); | |
1305 | ||
1306 | rcu_read_lock(); | |
1307 | hashtable_add_unique(ust_app_sock_key_map, <a->key.node); | |
1308 | hashtable_add_unique(ust_app_ht, <a->node); | |
1309 | rcu_read_unlock(); | |
1310 | ||
1311 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
1312 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, | |
1313 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
1314 | ||
1315 | return 0; | |
1316 | } | |
1317 | ||
1318 | /* | |
1319 | * Unregister app by removing it from the global traceable app list and freeing | |
1320 | * the data struct. | |
1321 | * | |
1322 | * The socket is already closed at this point so no close to sock. | |
1323 | */ | |
1324 | void ust_app_unregister(int sock) | |
1325 | { | |
1326 | struct ust_app *lta; | |
1327 | struct cds_lfht_node *node; | |
1328 | struct cds_lfht_iter iter; | |
525b0740 | 1329 | int ret; |
5b4a0ec0 DG |
1330 | |
1331 | rcu_read_lock(); | |
1332 | lta = find_app_by_sock(sock); | |
1333 | if (lta == NULL) { | |
1334 | ERR("Unregister app sock %d not found!", sock); | |
1335 | goto error; | |
1336 | } | |
1337 | ||
1338 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
1339 | ||
1340 | /* Get the node reference for a call_rcu */ | |
1341 | node = hashtable_lookup(ust_app_ht, | |
1342 | (void *)((unsigned long) lta->key.pid), sizeof(void *), &iter); | |
1343 | if (node == NULL) { | |
1344 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
1345 | goto error; | |
1346 | } | |
284d8f55 | 1347 | |
525b0740 MD |
1348 | ret = hashtable_del(ust_app_ht, &iter); |
1349 | assert(!ret); | |
5b4a0ec0 | 1350 | call_rcu(&node->head, delete_ust_app_rcu); |
284d8f55 | 1351 | error: |
5b4a0ec0 DG |
1352 | rcu_read_unlock(); |
1353 | return; | |
284d8f55 DG |
1354 | } |
1355 | ||
1356 | /* | |
5b4a0ec0 | 1357 | * Return traceable_app_count |
284d8f55 | 1358 | */ |
5b4a0ec0 | 1359 | unsigned long ust_app_list_count(void) |
284d8f55 | 1360 | { |
5b4a0ec0 | 1361 | unsigned long count; |
284d8f55 | 1362 | |
5b4a0ec0 DG |
1363 | rcu_read_lock(); |
1364 | count = hashtable_get_count(ust_app_ht); | |
1365 | rcu_read_unlock(); | |
284d8f55 | 1366 | |
5b4a0ec0 | 1367 | return count; |
284d8f55 DG |
1368 | } |
1369 | ||
5b4a0ec0 DG |
1370 | /* |
1371 | * Fill events array with all events name of all registered apps. | |
1372 | */ | |
1373 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1374 | { |
5b4a0ec0 DG |
1375 | int ret, handle; |
1376 | size_t nbmem, count = 0; | |
421cb601 | 1377 | struct cds_lfht_iter iter; |
5b4a0ec0 DG |
1378 | struct ust_app *app; |
1379 | struct lttng_event *tmp; | |
421cb601 | 1380 | |
5b4a0ec0 DG |
1381 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1382 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1383 | if (tmp == NULL) { | |
1384 | PERROR("zmalloc ust app events"); | |
1385 | ret = -ENOMEM; | |
421cb601 DG |
1386 | goto error; |
1387 | } | |
1388 | ||
5b4a0ec0 | 1389 | rcu_read_lock(); |
421cb601 | 1390 | |
5b4a0ec0 | 1391 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
90eaa0d2 | 1392 | struct lttng_ust_tracepoint_iter uiter; |
ac3bd9c0 | 1393 | |
5b4a0ec0 DG |
1394 | handle = ustctl_tracepoint_list(app->key.sock); |
1395 | if (handle < 0) { | |
1396 | ERR("UST app list events getting handle failed for app pid %d", | |
1397 | app->key.pid); | |
1398 | continue; | |
1399 | } | |
421cb601 | 1400 | |
5b4a0ec0 | 1401 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, |
90eaa0d2 | 1402 | &uiter)) != -ENOENT) { |
815564d8 MD |
1403 | if (count >= nbmem) { |
1404 | DBG2("Reallocating event list from %zu to %zu entries", nbmem, | |
1405 | 2 * nbmem); | |
1406 | nbmem *= 2; | |
2f221590 | 1407 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event)); |
5b4a0ec0 DG |
1408 | if (tmp == NULL) { |
1409 | PERROR("realloc ust app events"); | |
1410 | ret = -ENOMEM; | |
1411 | goto rcu_error; | |
1412 | } | |
1413 | } | |
90eaa0d2 DG |
1414 | memcpy(tmp[count].name, uiter.name, LTTNG_UST_SYM_NAME_LEN); |
1415 | memcpy(tmp[count].loglevel, uiter.loglevel, LTTNG_UST_SYM_NAME_LEN); | |
1416 | tmp[count].loglevel_value = uiter.loglevel_value; | |
5b4a0ec0 DG |
1417 | tmp[count].type = LTTNG_UST_TRACEPOINT; |
1418 | tmp[count].pid = app->key.pid; | |
1419 | tmp[count].enabled = -1; | |
1420 | count++; | |
421cb601 | 1421 | } |
421cb601 DG |
1422 | } |
1423 | ||
5b4a0ec0 DG |
1424 | ret = count; |
1425 | *events = tmp; | |
421cb601 | 1426 | |
5b4a0ec0 | 1427 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1428 | |
5b4a0ec0 DG |
1429 | rcu_error: |
1430 | rcu_read_unlock(); | |
421cb601 | 1431 | error: |
5b4a0ec0 | 1432 | return ret; |
421cb601 DG |
1433 | } |
1434 | ||
5b4a0ec0 DG |
1435 | /* |
1436 | * Free and clean all traceable apps of the global list. | |
1437 | */ | |
1438 | void ust_app_clean_list(void) | |
421cb601 | 1439 | { |
5b4a0ec0 | 1440 | int ret; |
5b4a0ec0 DG |
1441 | struct cds_lfht_iter iter; |
1442 | struct ust_app *app; | |
421cb601 | 1443 | |
5b4a0ec0 | 1444 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1445 | |
5b4a0ec0 | 1446 | rcu_read_lock(); |
421cb601 | 1447 | |
778ca3dd | 1448 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
5b4a0ec0 | 1449 | ret = hashtable_del(ust_app_ht, &iter); |
525b0740 | 1450 | assert(!ret); |
0d5d001d | 1451 | call_rcu(&iter.node->head, delete_ust_app_rcu); |
421cb601 DG |
1452 | } |
1453 | ||
5b4a0ec0 DG |
1454 | hashtable_destroy(ust_app_ht); |
1455 | hashtable_destroy(ust_app_sock_key_map); | |
421cb601 | 1456 | |
5b4a0ec0 DG |
1457 | rcu_read_unlock(); |
1458 | } | |
1459 | ||
1460 | /* | |
1461 | * Init UST app hash table. | |
1462 | */ | |
1463 | void ust_app_ht_alloc(void) | |
1464 | { | |
1465 | ust_app_ht = hashtable_new(0); | |
1466 | ust_app_sock_key_map = hashtable_new(0); | |
421cb601 DG |
1467 | } |
1468 | ||
78f0bacd DG |
1469 | /* |
1470 | * For a specific UST session, disable the channel for all registered apps. | |
1471 | */ | |
35a9059d | 1472 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1473 | struct ltt_ust_channel *uchan) |
1474 | { | |
1475 | int ret = 0; | |
1476 | struct cds_lfht_iter iter; | |
8535a6d9 | 1477 | struct cds_lfht_node *ua_chan_node; |
78f0bacd DG |
1478 | struct ust_app *app; |
1479 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1480 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1481 | |
1482 | if (usess == NULL || uchan == NULL) { | |
1483 | ERR("Disabling UST global channel with NULL values"); | |
1484 | ret = -1; | |
1485 | goto error; | |
1486 | } | |
1487 | ||
a991f516 MD |
1488 | DBG2("UST app disabling channel %s from global domain for session id %d", |
1489 | uchan->name, usess->id); | |
78f0bacd DG |
1490 | |
1491 | rcu_read_lock(); | |
1492 | ||
1493 | /* For every registered applications */ | |
1494 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
90eaa0d2 DG |
1495 | struct cds_lfht_iter uiter; |
1496 | ||
78f0bacd DG |
1497 | ua_sess = lookup_session_by_app(usess, app); |
1498 | if (ua_sess == NULL) { | |
1499 | continue; | |
1500 | } | |
1501 | ||
8535a6d9 DG |
1502 | /* Get channel */ |
1503 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
90eaa0d2 | 1504 | (void *)uchan->name, strlen(uchan->name), &uiter); |
8535a6d9 DG |
1505 | /* If the session if found for the app, the channel must be there */ |
1506 | assert(ua_chan_node); | |
1507 | ||
1508 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1509 | /* The channel must not be already disabled */ | |
1510 | assert(ua_chan->enabled == 1); | |
1511 | ||
1512 | /* Disable channel onto application */ | |
1513 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1514 | if (ret < 0) { |
1515 | /* XXX: We might want to report this error at some point... */ | |
1516 | continue; | |
1517 | } | |
1518 | } | |
1519 | ||
1520 | rcu_read_unlock(); | |
1521 | ||
1522 | error: | |
1523 | return ret; | |
1524 | } | |
1525 | ||
1526 | /* | |
1527 | * For a specific UST session, enable the channel for all registered apps. | |
1528 | */ | |
35a9059d | 1529 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1530 | struct ltt_ust_channel *uchan) |
1531 | { | |
1532 | int ret = 0; | |
1533 | struct cds_lfht_iter iter; | |
1534 | struct ust_app *app; | |
1535 | struct ust_app_session *ua_sess; | |
1536 | ||
1537 | if (usess == NULL || uchan == NULL) { | |
1538 | ERR("Adding UST global channel to NULL values"); | |
1539 | ret = -1; | |
1540 | goto error; | |
1541 | } | |
1542 | ||
a991f516 MD |
1543 | DBG2("UST app enabling channel %s to global domain for session id %d", |
1544 | uchan->name, usess->id); | |
78f0bacd DG |
1545 | |
1546 | rcu_read_lock(); | |
1547 | ||
1548 | /* For every registered applications */ | |
1549 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1550 | ua_sess = lookup_session_by_app(usess, app); | |
1551 | if (ua_sess == NULL) { | |
1552 | continue; | |
1553 | } | |
1554 | ||
1555 | /* Enable channel onto application */ | |
1556 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1557 | if (ret < 0) { | |
1558 | /* XXX: We might want to report this error at some point... */ | |
1559 | continue; | |
1560 | } | |
1561 | } | |
1562 | ||
1563 | rcu_read_unlock(); | |
1564 | ||
1565 | error: | |
1566 | return ret; | |
1567 | } | |
1568 | ||
b0a40d28 DG |
1569 | /* |
1570 | * Disable an event in a channel and for a specific session. | |
1571 | */ | |
35a9059d DG |
1572 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
1573 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
1574 | { |
1575 | int ret = 0; | |
90eaa0d2 | 1576 | struct cds_lfht_iter iter; |
b0a40d28 DG |
1577 | struct cds_lfht_node *ua_chan_node, *ua_event_node; |
1578 | struct ust_app *app; | |
1579 | struct ust_app_session *ua_sess; | |
1580 | struct ust_app_channel *ua_chan; | |
1581 | struct ust_app_event *ua_event; | |
1582 | ||
1583 | DBG("UST app disabling event %s for all apps in channel " | |
a991f516 | 1584 | "%s for session id %d", uevent->attr.name, uchan->name, usess->id); |
b0a40d28 DG |
1585 | |
1586 | rcu_read_lock(); | |
1587 | ||
1588 | /* For all registered applications */ | |
1589 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
90eaa0d2 DG |
1590 | struct cds_lfht_iter uiter; |
1591 | ||
b0a40d28 DG |
1592 | ua_sess = lookup_session_by_app(usess, app); |
1593 | if (ua_sess == NULL) { | |
1594 | /* Next app */ | |
1595 | continue; | |
1596 | } | |
1597 | ||
1598 | /* Lookup channel in the ust app session */ | |
1599 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
1600 | (void *)uchan->name, strlen(uchan->name), &uiter); | |
1601 | if (ua_chan_node == NULL) { | |
a991f516 MD |
1602 | DBG2("Channel %s not found in session id %d for app pid %d." |
1603 | "Skipping", uchan->name, usess->id, app->key.pid); | |
b0a40d28 DG |
1604 | continue; |
1605 | } | |
1606 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1607 | ||
1608 | ua_event_node = hashtable_lookup(ua_chan->events, | |
35a9059d | 1609 | (void *)uevent->attr.name, strlen(uevent->attr.name), &uiter); |
b0a40d28 DG |
1610 | if (ua_event_node == NULL) { |
1611 | DBG2("Event %s not found in channel %s for app pid %d." | |
35a9059d | 1612 | "Skipping", uevent->attr.name, uchan->name, app->key.pid); |
b0a40d28 DG |
1613 | continue; |
1614 | } | |
1615 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1616 | ||
7f79d3a1 | 1617 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
b0a40d28 DG |
1618 | if (ret < 0) { |
1619 | /* XXX: Report error someday... */ | |
1620 | continue; | |
1621 | } | |
1622 | } | |
1623 | ||
1624 | rcu_read_unlock(); | |
1625 | ||
1626 | return ret; | |
1627 | } | |
1628 | ||
9730260e | 1629 | /* |
edb67388 | 1630 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
1631 | * registered apps. |
1632 | */ | |
35a9059d | 1633 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
1634 | struct ltt_ust_channel *uchan) |
1635 | { | |
1636 | int ret = 0; | |
90eaa0d2 | 1637 | struct cds_lfht_iter iter; |
9730260e DG |
1638 | struct cds_lfht_node *ua_chan_node; |
1639 | struct ust_app *app; | |
1640 | struct ust_app_session *ua_sess; | |
1641 | struct ust_app_channel *ua_chan; | |
1642 | struct ust_app_event *ua_event; | |
1643 | ||
1644 | DBG("UST app disabling all event for all apps in channel " | |
a991f516 | 1645 | "%s for session id %d", uchan->name, usess->id); |
9730260e DG |
1646 | |
1647 | rcu_read_lock(); | |
1648 | ||
1649 | /* For all registered applications */ | |
1650 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
90eaa0d2 DG |
1651 | struct cds_lfht_iter uiter; |
1652 | ||
9730260e | 1653 | ua_sess = lookup_session_by_app(usess, app); |
edb67388 DG |
1654 | /* If ua_sess is NULL, there is a code flow error */ |
1655 | assert(ua_sess); | |
9730260e DG |
1656 | |
1657 | /* Lookup channel in the ust app session */ | |
edb67388 DG |
1658 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, |
1659 | strlen(uchan->name), &uiter); | |
1660 | /* If the channel is not found, there is a code flow error */ | |
1661 | assert(ua_chan_node); | |
1662 | ||
9730260e DG |
1663 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1664 | ||
1665 | /* Disable each events of channel */ | |
1666 | cds_lfht_for_each_entry(ua_chan->events, &uiter, ua_event, 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 | { | |
1686 | int ret = 0; | |
1687 | struct cds_lfht_iter iter; | |
48842b30 DG |
1688 | struct ust_app *app; |
1689 | struct ust_app_session *ua_sess; | |
1690 | struct ust_app_channel *ua_chan; | |
1691 | ||
421cb601 DG |
1692 | if (usess == NULL || uchan == NULL) { |
1693 | ERR("Adding UST global channel to NULL values"); | |
1694 | ret = -1; | |
1695 | goto error; | |
1696 | } | |
1697 | ||
a991f516 MD |
1698 | DBG2("UST app adding channel %s to global domain for session id %d", |
1699 | uchan->name, usess->id); | |
48842b30 DG |
1700 | |
1701 | rcu_read_lock(); | |
421cb601 | 1702 | |
5b4a0ec0 DG |
1703 | /* For every registered applications */ |
1704 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
edb67388 DG |
1705 | /* |
1706 | * Create session on the tracer side and add it to app session HT. Note | |
1707 | * that if session exist, it will simply return a pointer to the ust | |
1708 | * app session. | |
1709 | */ | |
421cb601 | 1710 | ua_sess = create_ust_app_session(usess, app); |
509cbaf8 | 1711 | if (ua_sess == NULL) { |
5b4a0ec0 | 1712 | continue; |
48842b30 DG |
1713 | } |
1714 | ||
421cb601 DG |
1715 | /* Create channel onto application */ |
1716 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1717 | if (ua_chan == NULL) { | |
5b4a0ec0 | 1718 | continue; |
48842b30 | 1719 | } |
48842b30 | 1720 | } |
5b4a0ec0 | 1721 | |
48842b30 DG |
1722 | rcu_read_unlock(); |
1723 | ||
421cb601 | 1724 | error: |
48842b30 DG |
1725 | return ret; |
1726 | } | |
1727 | ||
5b4a0ec0 | 1728 | /* |
edb67388 | 1729 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 1730 | */ |
35a9059d | 1731 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1732 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1733 | { | |
1734 | int ret = 0; | |
90eaa0d2 | 1735 | struct cds_lfht_iter iter; |
35a9059d | 1736 | struct cds_lfht_node *ua_chan_node, *ua_event_node; |
48842b30 DG |
1737 | struct ust_app *app; |
1738 | struct ust_app_session *ua_sess; | |
1739 | struct ust_app_channel *ua_chan; | |
1740 | struct ust_app_event *ua_event; | |
48842b30 | 1741 | |
a991f516 MD |
1742 | DBG("UST app enabling event %s for all apps for session id %d", |
1743 | uevent->attr.name, usess->id); | |
48842b30 | 1744 | |
edb67388 DG |
1745 | /* |
1746 | * NOTE: At this point, this function is called only if the session and | |
1747 | * channel passed are already created for all apps. and enabled on the | |
1748 | * tracer also. | |
1749 | */ | |
1750 | ||
48842b30 | 1751 | rcu_read_lock(); |
421cb601 DG |
1752 | |
1753 | /* For all registered applications */ | |
5b4a0ec0 | 1754 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
90eaa0d2 DG |
1755 | struct cds_lfht_iter uiter; |
1756 | ||
edb67388 DG |
1757 | ua_sess = lookup_session_by_app(usess, app); |
1758 | /* If ua_sess is NULL, there is a code flow error */ | |
1759 | assert(ua_sess); | |
ba767faf | 1760 | |
edb67388 DG |
1761 | /* Lookup channel in the ust app session */ |
1762 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, | |
1763 | strlen(uchan->name), &uiter); | |
1764 | /* If the channel is not found, there is a code flow error */ | |
1765 | assert(ua_chan_node); | |
1766 | ||
1767 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1768 | ||
7f79d3a1 | 1769 | ua_event_node = hashtable_lookup(ua_chan->events, |
35a9059d DG |
1770 | (void*)uevent->attr.name, strlen(uevent->attr.name), &uiter); |
1771 | if (ua_event_node == NULL) { | |
7f79d3a1 DG |
1772 | DBG3("UST app enable event %s not found for app PID %d." |
1773 | "Skipping app", uevent->attr.name, app->key.pid); | |
35a9059d DG |
1774 | continue; |
1775 | } | |
1776 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1777 | ||
1778 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
1779 | if (ret < 0) { | |
7f79d3a1 | 1780 | goto error; |
48842b30 | 1781 | } |
edb67388 DG |
1782 | } |
1783 | ||
7f79d3a1 | 1784 | error: |
edb67388 | 1785 | rcu_read_unlock(); |
edb67388 DG |
1786 | return ret; |
1787 | } | |
1788 | ||
1789 | /* | |
1790 | * For a specific existing UST session and UST channel, creates the event for | |
1791 | * all registered apps. | |
1792 | */ | |
35a9059d | 1793 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
1794 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1795 | { | |
1796 | int ret = 0; | |
90eaa0d2 | 1797 | struct cds_lfht_iter iter; |
edb67388 DG |
1798 | struct cds_lfht_node *ua_chan_node; |
1799 | struct ust_app *app; | |
1800 | struct ust_app_session *ua_sess; | |
1801 | struct ust_app_channel *ua_chan; | |
1802 | ||
a991f516 MD |
1803 | DBG("UST app creating event %s for all apps for session id %d", |
1804 | uevent->attr.name, usess->id); | |
edb67388 DG |
1805 | |
1806 | /* | |
1807 | * NOTE: At this point, this function is called only if the session and | |
1808 | * channel passed are already created for all apps. and enabled on the | |
1809 | * tracer also. | |
1810 | */ | |
1811 | ||
1812 | rcu_read_lock(); | |
1813 | ||
1814 | /* For all registered applications */ | |
1815 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
90eaa0d2 DG |
1816 | struct cds_lfht_iter uiter; |
1817 | ||
edb67388 DG |
1818 | ua_sess = lookup_session_by_app(usess, app); |
1819 | /* If ua_sess is NULL, there is a code flow error */ | |
1820 | assert(ua_sess); | |
48842b30 DG |
1821 | |
1822 | /* Lookup channel in the ust app session */ | |
edb67388 DG |
1823 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, |
1824 | strlen(uchan->name), &uiter); | |
1825 | /* If the channel is not found, there is a code flow error */ | |
1826 | assert(ua_chan_node); | |
1827 | ||
48842b30 DG |
1828 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1829 | ||
edb67388 DG |
1830 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1831 | if (ret < 0) { | |
5b4a0ec0 | 1832 | continue; |
48842b30 | 1833 | } |
48842b30 | 1834 | } |
5b4a0ec0 | 1835 | |
48842b30 DG |
1836 | rcu_read_unlock(); |
1837 | ||
1838 | return ret; | |
1839 | } | |
1840 | ||
5b4a0ec0 DG |
1841 | /* |
1842 | * Start tracing for a specific UST session and app. | |
1843 | */ | |
421cb601 | 1844 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1845 | { |
1846 | int ret = 0; | |
1847 | struct cds_lfht_iter iter; | |
48842b30 DG |
1848 | struct ust_app_session *ua_sess; |
1849 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 1850 | struct ltt_ust_stream *ustream; |
7753dea8 | 1851 | int consumerd_fd; |
48842b30 | 1852 | |
421cb601 | 1853 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 1854 | |
509cbaf8 MD |
1855 | rcu_read_lock(); |
1856 | ||
421cb601 DG |
1857 | ua_sess = lookup_session_by_app(usess, app); |
1858 | if (ua_sess == NULL) { | |
509cbaf8 | 1859 | goto error_rcu_unlock; |
421cb601 | 1860 | } |
48842b30 | 1861 | |
aea829b3 DG |
1862 | /* Upon restart, we skip the setup, already done */ |
1863 | if (ua_sess->started) { | |
8be98f9a | 1864 | goto skip_setup; |
aea829b3 | 1865 | } |
8be98f9a | 1866 | |
421cb601 DG |
1867 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1868 | if (ret < 0) { | |
509cbaf8 | 1869 | goto error_rcu_unlock; |
421cb601 | 1870 | } |
48842b30 | 1871 | |
421cb601 | 1872 | /* For each channel */ |
5b4a0ec0 | 1873 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { |
421cb601 DG |
1874 | /* Create all streams */ |
1875 | while (1) { | |
5b4a0ec0 | 1876 | /* Create UST stream */ |
421cb601 DG |
1877 | ustream = zmalloc(sizeof(*ustream)); |
1878 | if (ustream == NULL) { | |
1879 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1880 | goto error_rcu_unlock; |
421cb601 | 1881 | } |
48842b30 | 1882 | |
421cb601 DG |
1883 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
1884 | &ustream->obj); | |
48842b30 | 1885 | if (ret < 0) { |
421cb601 DG |
1886 | /* Got all streams */ |
1887 | break; | |
48842b30 | 1888 | } |
421cb601 | 1889 | ustream->handle = ustream->obj->handle; |
48842b30 | 1890 | |
421cb601 DG |
1891 | /* Order is important */ |
1892 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
477d7741 MD |
1893 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", |
1894 | ua_sess->path, ua_chan->name, | |
1895 | ua_chan->streams.count++); | |
aba8e916 DG |
1896 | if (ret < 0) { |
1897 | PERROR("asprintf UST create stream"); | |
421cb601 | 1898 | continue; |
aba8e916 | 1899 | } |
421cb601 DG |
1900 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1901 | ustream->pathname); | |
1902 | } | |
421cb601 | 1903 | } |
aba8e916 | 1904 | |
7753dea8 MD |
1905 | switch (app->bits_per_long) { |
1906 | case 64: | |
1907 | consumerd_fd = ust_consumerd64_fd; | |
1908 | break; | |
1909 | case 32: | |
1910 | consumerd_fd = ust_consumerd32_fd; | |
1911 | break; | |
1912 | default: | |
1913 | ret = -EINVAL; | |
1914 | goto error_rcu_unlock; | |
1915 | } | |
aea829b3 | 1916 | |
421cb601 | 1917 | /* Setup UST consumer socket and send fds to it */ |
7753dea8 | 1918 | ret = ust_consumer_send_session(consumerd_fd, ua_sess); |
421cb601 | 1919 | if (ret < 0) { |
509cbaf8 | 1920 | goto error_rcu_unlock; |
421cb601 | 1921 | } |
8be98f9a | 1922 | ua_sess->started = 1; |
48842b30 | 1923 | |
8be98f9a | 1924 | skip_setup: |
421cb601 DG |
1925 | /* This start the UST tracing */ |
1926 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
1927 | if (ret < 0) { | |
1928 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 1929 | goto error_rcu_unlock; |
421cb601 | 1930 | } |
5b4a0ec0 | 1931 | |
509cbaf8 | 1932 | rcu_read_unlock(); |
48842b30 | 1933 | |
421cb601 DG |
1934 | /* Quiescent wait after starting trace */ |
1935 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 1936 | |
421cb601 | 1937 | return 0; |
48842b30 | 1938 | |
509cbaf8 MD |
1939 | error_rcu_unlock: |
1940 | rcu_read_unlock(); | |
421cb601 DG |
1941 | return -1; |
1942 | } | |
48842b30 | 1943 | |
8be98f9a MD |
1944 | /* |
1945 | * Stop tracing for a specific UST session and app. | |
1946 | */ | |
1947 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1948 | { | |
1949 | int ret = 0; | |
6d3686da | 1950 | struct cds_lfht_iter iter; |
8be98f9a | 1951 | struct ust_app_session *ua_sess; |
6d3686da | 1952 | struct ust_app_channel *ua_chan; |
8be98f9a MD |
1953 | |
1954 | DBG("Stopping tracing for ust app pid %d", app->key.pid); | |
1955 | ||
1956 | rcu_read_lock(); | |
1957 | ||
1958 | ua_sess = lookup_session_by_app(usess, app); | |
1959 | if (ua_sess == NULL) { | |
1960 | /* Only malloc can failed so something is really wrong */ | |
1961 | goto error_rcu_unlock; | |
1962 | } | |
1963 | ||
9d6c7d3f DG |
1964 | /* This inhibits UST tracing */ |
1965 | ret = ustctl_stop_session(app->key.sock, ua_sess->handle); | |
1966 | if (ret < 0) { | |
1967 | ERR("Error stopping tracing for app pid: %d", app->key.pid); | |
1968 | goto error_rcu_unlock; | |
1969 | } | |
1970 | ||
1971 | /* Quiescent wait after stopping trace */ | |
1972 | ustctl_wait_quiescent(app->key.sock); | |
1973 | ||
1974 | /* Flushing buffers */ | |
6d3686da DG |
1975 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { |
1976 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_chan->obj); | |
8be98f9a | 1977 | if (ret < 0) { |
6d3686da DG |
1978 | ERR("UST app PID %d channel %s flush failed", |
1979 | app->key.pid, ua_chan->name); | |
1980 | ERR("Ended with ret %d", ret); | |
1981 | /* Continuing flushing all buffers */ | |
1982 | continue; | |
8be98f9a MD |
1983 | } |
1984 | } | |
8be98f9a | 1985 | |
90d97d10 DG |
1986 | /* Flush all buffers before stopping */ |
1987 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_sess->metadata->obj); | |
1988 | if (ret < 0) { | |
1989 | ERR("UST app PID %d metadata flush failed", app->key.pid); | |
1990 | ERR("Ended with ret %d", ret); | |
1991 | } | |
1992 | ||
9d6c7d3f DG |
1993 | rcu_read_unlock(); |
1994 | ||
8be98f9a MD |
1995 | return 0; |
1996 | ||
1997 | error_rcu_unlock: | |
1998 | rcu_read_unlock(); | |
1999 | return -1; | |
2000 | } | |
2001 | ||
84cd17c6 MD |
2002 | /* |
2003 | * Destroy a specific UST session in apps. | |
2004 | */ | |
2005 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2006 | { | |
2007 | struct ust_app_session *ua_sess; | |
2008 | struct lttng_ust_object_data obj; | |
2009 | struct cds_lfht_iter iter; | |
2010 | struct cds_lfht_node *node; | |
525b0740 | 2011 | int ret; |
84cd17c6 MD |
2012 | |
2013 | DBG("Destroy tracing for ust app pid %d", app->key.pid); | |
2014 | ||
2015 | rcu_read_lock(); | |
2016 | ||
2017 | __lookup_session_by_app(usess, app, &iter); | |
2018 | node = hashtable_iter_get_node(&iter); | |
2019 | if (node == NULL) { | |
2020 | /* Only malloc can failed so something is really wrong */ | |
2021 | goto error_rcu_unlock; | |
2022 | } | |
2023 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
525b0740 MD |
2024 | ret = hashtable_del(app->sessions, &iter); |
2025 | assert(!ret); | |
84cd17c6 MD |
2026 | delete_ust_app_session(app->key.sock, ua_sess); |
2027 | obj.handle = ua_sess->handle; | |
2028 | obj.shm_fd = -1; | |
2029 | obj.wait_fd = -1; | |
2030 | obj.memory_map_size = 0; | |
2031 | ustctl_release_object(app->key.sock, &obj); | |
2032 | ||
2033 | rcu_read_unlock(); | |
2034 | ||
2035 | /* Quiescent wait after stopping trace */ | |
2036 | ustctl_wait_quiescent(app->key.sock); | |
2037 | ||
2038 | return 0; | |
2039 | ||
2040 | error_rcu_unlock: | |
2041 | rcu_read_unlock(); | |
2042 | return -1; | |
2043 | } | |
2044 | ||
5b4a0ec0 DG |
2045 | /* |
2046 | * Start tracing for the UST session. | |
2047 | */ | |
421cb601 DG |
2048 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
2049 | { | |
2050 | int ret = 0; | |
2051 | struct cds_lfht_iter iter; | |
421cb601 | 2052 | struct ust_app *app; |
48842b30 | 2053 | |
421cb601 DG |
2054 | DBG("Starting all UST traces"); |
2055 | ||
2056 | rcu_read_lock(); | |
421cb601 | 2057 | |
5b4a0ec0 | 2058 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
421cb601 | 2059 | ret = ust_app_start_trace(usess, app); |
48842b30 | 2060 | if (ret < 0) { |
5b4a0ec0 DG |
2061 | /* Continue to next apps even on error */ |
2062 | continue; | |
48842b30 | 2063 | } |
48842b30 | 2064 | } |
5b4a0ec0 | 2065 | |
48842b30 DG |
2066 | rcu_read_unlock(); |
2067 | ||
2068 | return 0; | |
2069 | } | |
487cf67c | 2070 | |
8be98f9a MD |
2071 | /* |
2072 | * Start tracing for the UST session. | |
2073 | */ | |
2074 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
2075 | { | |
2076 | int ret = 0; | |
2077 | struct cds_lfht_iter iter; | |
2078 | struct ust_app *app; | |
2079 | ||
2080 | DBG("Stopping all UST traces"); | |
2081 | ||
2082 | rcu_read_lock(); | |
2083 | ||
2084 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
2085 | ret = ust_app_stop_trace(usess, app); | |
2086 | if (ret < 0) { | |
2087 | /* Continue to next apps even on error */ | |
2088 | continue; | |
2089 | } | |
2090 | } | |
2091 | ||
2092 | rcu_read_unlock(); | |
2093 | ||
2094 | return 0; | |
2095 | } | |
2096 | ||
84cd17c6 MD |
2097 | /* |
2098 | * Destroy app UST session. | |
2099 | */ | |
2100 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
2101 | { | |
2102 | int ret = 0; | |
2103 | struct cds_lfht_iter iter; | |
2104 | struct ust_app *app; | |
2105 | ||
2106 | DBG("Destroy all UST traces"); | |
2107 | ||
2108 | rcu_read_lock(); | |
2109 | ||
2110 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
2111 | ret = ust_app_destroy_trace(usess, app); | |
2112 | if (ret < 0) { | |
2113 | /* Continue to next apps even on error */ | |
2114 | continue; | |
2115 | } | |
2116 | } | |
2117 | ||
2118 | rcu_read_unlock(); | |
2119 | ||
2120 | return 0; | |
2121 | } | |
2122 | ||
5b4a0ec0 DG |
2123 | /* |
2124 | * Add channels/events from UST global domain to registered apps at sock. | |
2125 | */ | |
487cf67c DG |
2126 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
2127 | { | |
2128 | int ret = 0; | |
487cf67c | 2129 | struct cds_lfht_iter iter; |
487cf67c DG |
2130 | struct ust_app *app; |
2131 | struct ust_app_session *ua_sess; | |
2132 | struct ust_app_channel *ua_chan; | |
2133 | struct ust_app_event *ua_event; | |
1f3580c7 DG |
2134 | |
2135 | if (usess == NULL) { | |
5b4a0ec0 | 2136 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
2137 | goto error; |
2138 | } | |
2139 | ||
a991f516 MD |
2140 | DBG2("UST app global update for app sock %d for session id %d", sock, |
2141 | usess->id); | |
487cf67c | 2142 | |
284d8f55 DG |
2143 | rcu_read_lock(); |
2144 | ||
487cf67c DG |
2145 | app = find_app_by_sock(sock); |
2146 | if (app == NULL) { | |
2147 | ERR("Failed to update app sock %d", sock); | |
2148 | goto error; | |
2149 | } | |
2150 | ||
421cb601 | 2151 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 2152 | if (ua_sess == NULL) { |
487cf67c DG |
2153 | goto error; |
2154 | } | |
2155 | ||
284d8f55 DG |
2156 | /* |
2157 | * We can iterate safely here over all UST app session sicne the create ust | |
2158 | * app session above made a shadow copy of the UST global domain from the | |
2159 | * ltt ust session. | |
2160 | */ | |
2161 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { | |
90eaa0d2 DG |
2162 | struct cds_lfht_iter uiter; |
2163 | ||
284d8f55 DG |
2164 | ret = create_ust_channel(app, ua_sess, ua_chan); |
2165 | if (ret < 0) { | |
2166 | /* FIXME: Should we quit here or continue... */ | |
2167 | continue; | |
487cf67c DG |
2168 | } |
2169 | ||
284d8f55 | 2170 | /* For each events */ |
90eaa0d2 | 2171 | cds_lfht_for_each_entry(ua_chan->events, &uiter, ua_event, node) { |
284d8f55 DG |
2172 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
2173 | if (ret < 0) { | |
2174 | /* FIXME: Should we quit here or continue... */ | |
2175 | continue; | |
487cf67c | 2176 | } |
36dc12cc | 2177 | } |
487cf67c DG |
2178 | } |
2179 | ||
36dc12cc | 2180 | if (usess->start_trace) { |
421cb601 | 2181 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 2182 | if (ret < 0) { |
36dc12cc DG |
2183 | goto error; |
2184 | } | |
2185 | ||
36dc12cc DG |
2186 | DBG2("UST trace started for app pid %d", app->key.pid); |
2187 | } | |
2188 | ||
487cf67c DG |
2189 | error: |
2190 | rcu_read_unlock(); | |
2191 | return; | |
2192 | } | |
55cc08a6 DG |
2193 | |
2194 | /* | |
2195 | * Add context to a specific channel for global UST domain. | |
2196 | */ | |
2197 | int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess, | |
2198 | struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx) | |
2199 | { | |
2200 | int ret = 0; | |
2201 | struct cds_lfht_node *ua_chan_node; | |
90eaa0d2 | 2202 | struct cds_lfht_iter iter; |
55cc08a6 DG |
2203 | struct ust_app_channel *ua_chan = NULL; |
2204 | struct ust_app_session *ua_sess; | |
2205 | struct ust_app *app; | |
2206 | ||
2207 | rcu_read_lock(); | |
2208 | ||
2209 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
90eaa0d2 DG |
2210 | struct cds_lfht_iter uiter; |
2211 | ||
55cc08a6 DG |
2212 | ua_sess = lookup_session_by_app(usess, app); |
2213 | if (ua_sess == NULL) { | |
2214 | continue; | |
2215 | } | |
2216 | ||
2217 | /* Lookup channel in the ust app session */ | |
2218 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
2219 | (void *)uchan->name, strlen(uchan->name), &uiter); | |
2220 | if (ua_chan_node == NULL) { | |
2221 | continue; | |
2222 | } | |
2223 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2224 | node); | |
2225 | ||
2226 | ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app); | |
2227 | if (ret < 0) { | |
2228 | continue; | |
2229 | } | |
2230 | } | |
2231 | ||
55cc08a6 DG |
2232 | rcu_read_unlock(); |
2233 | return ret; | |
2234 | } | |
2235 | ||
2236 | /* | |
2237 | * Add context to a specific event in a channel for global UST domain. | |
2238 | */ | |
2239 | int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess, | |
2240 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
2241 | struct ltt_ust_context *uctx) | |
2242 | { | |
2243 | int ret = 0; | |
2244 | struct cds_lfht_node *ua_chan_node, *ua_event_node; | |
90eaa0d2 | 2245 | struct cds_lfht_iter iter; |
55cc08a6 DG |
2246 | struct ust_app_session *ua_sess; |
2247 | struct ust_app_event *ua_event; | |
2248 | struct ust_app_channel *ua_chan = NULL; | |
2249 | struct ust_app *app; | |
2250 | ||
2251 | rcu_read_lock(); | |
2252 | ||
2253 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
90eaa0d2 DG |
2254 | struct cds_lfht_iter uiter; |
2255 | ||
55cc08a6 DG |
2256 | ua_sess = lookup_session_by_app(usess, app); |
2257 | if (ua_sess == NULL) { | |
2258 | continue; | |
2259 | } | |
2260 | ||
2261 | /* Lookup channel in the ust app session */ | |
2262 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
2263 | (void *)uchan->name, strlen(uchan->name), &uiter); | |
2264 | if (ua_chan_node == NULL) { | |
2265 | continue; | |
2266 | } | |
2267 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2268 | node); | |
2269 | ||
2270 | ua_event_node = hashtable_lookup(ua_chan->events, | |
2271 | (void *)uevent->attr.name, strlen(uevent->attr.name), &uiter); | |
2272 | if (ua_event_node == NULL) { | |
2273 | continue; | |
2274 | } | |
2275 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, | |
2276 | node); | |
2277 | ||
2278 | ret = create_ust_app_event_context(ua_sess, ua_event, &uctx->ctx, app); | |
2279 | if (ret < 0) { | |
2280 | continue; | |
2281 | } | |
2282 | } | |
2283 | ||
55cc08a6 DG |
2284 | rcu_read_unlock(); |
2285 | return ret; | |
2286 | } | |
76d45b40 DG |
2287 | |
2288 | /* | |
2289 | * Enable event for a channel from a UST session for a specific PID. | |
2290 | */ | |
2291 | int ust_app_enable_event_pid(struct ltt_ust_session *usess, | |
2292 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2293 | { | |
2294 | int ret = 0; | |
2295 | struct cds_lfht_iter iter; | |
2296 | struct cds_lfht_node *ua_chan_node, *ua_event_node; | |
2297 | struct ust_app *app; | |
2298 | struct ust_app_session *ua_sess; | |
2299 | struct ust_app_channel *ua_chan; | |
2300 | struct ust_app_event *ua_event; | |
2301 | ||
2302 | DBG("UST app enabling event %s for PID %d", uevent->attr.name, pid); | |
2303 | ||
2304 | rcu_read_lock(); | |
2305 | ||
2306 | app = ust_app_find_by_pid(pid); | |
2307 | if (app == NULL) { | |
2308 | ERR("UST app enable event per PID %d not found", pid); | |
2309 | ret = -1; | |
2310 | goto error; | |
2311 | } | |
2312 | ||
2313 | ua_sess = lookup_session_by_app(usess, app); | |
2314 | /* If ua_sess is NULL, there is a code flow error */ | |
2315 | assert(ua_sess); | |
2316 | ||
2317 | /* Lookup channel in the ust app session */ | |
2318 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, | |
2319 | strlen(uchan->name), &iter); | |
2320 | /* If the channel is not found, there is a code flow error */ | |
2321 | assert(ua_chan_node); | |
2322 | ||
2323 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2324 | ||
7f79d3a1 | 2325 | ua_event_node = hashtable_lookup(ua_chan->events, |
76d45b40 DG |
2326 | (void*)uevent->attr.name, strlen(uevent->attr.name), &iter); |
2327 | if (ua_event_node == NULL) { | |
2328 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); | |
2329 | if (ret < 0) { | |
2330 | goto error; | |
2331 | } | |
2332 | } else { | |
2333 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2334 | ||
2335 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2336 | if (ret < 0) { | |
2337 | goto error; | |
2338 | } | |
2339 | } | |
2340 | ||
2341 | error: | |
2342 | rcu_read_unlock(); | |
2343 | return ret; | |
2344 | } | |
7f79d3a1 DG |
2345 | |
2346 | /* | |
2347 | * Disable event for a channel from a UST session for a specific PID. | |
2348 | */ | |
2349 | int ust_app_disable_event_pid(struct ltt_ust_session *usess, | |
2350 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2351 | { | |
2352 | int ret = 0; | |
2353 | struct cds_lfht_iter iter; | |
2354 | struct cds_lfht_node *ua_chan_node, *ua_event_node; | |
2355 | struct ust_app *app; | |
2356 | struct ust_app_session *ua_sess; | |
2357 | struct ust_app_channel *ua_chan; | |
2358 | struct ust_app_event *ua_event; | |
2359 | ||
2360 | DBG("UST app disabling event %s for PID %d", uevent->attr.name, pid); | |
2361 | ||
2362 | rcu_read_lock(); | |
2363 | ||
2364 | app = ust_app_find_by_pid(pid); | |
2365 | if (app == NULL) { | |
2366 | ERR("UST app disable event per PID %d not found", pid); | |
2367 | ret = -1; | |
2368 | goto error; | |
2369 | } | |
2370 | ||
2371 | ua_sess = lookup_session_by_app(usess, app); | |
2372 | /* If ua_sess is NULL, there is a code flow error */ | |
2373 | assert(ua_sess); | |
2374 | ||
2375 | /* Lookup channel in the ust app session */ | |
2376 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, | |
2377 | strlen(uchan->name), &iter); | |
2378 | if (ua_chan_node == NULL) { | |
2379 | /* Channel does not exist, skip disabling */ | |
2380 | goto error; | |
2381 | } | |
2382 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2383 | ||
2384 | ua_event_node = hashtable_lookup(ua_chan->events, | |
2385 | (void*)uevent->attr.name, strlen(uevent->attr.name), &iter); | |
2386 | if (ua_event_node == NULL) { | |
2387 | /* Event does not exist, skip disabling */ | |
2388 | goto error; | |
2389 | } | |
2390 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2391 | ||
2392 | ret = disable_ust_app_event(ua_sess, ua_event, app); | |
2393 | if (ret < 0) { | |
2394 | goto error; | |
2395 | } | |
2396 | ||
2397 | error: | |
2398 | rcu_read_unlock(); | |
2399 | return ret; | |
2400 | } |