Commit | Line | Data |
---|---|---|
91d76f53 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
91d76f53 DG |
7 | * |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
d14d33bf AM |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
91d76f53 DG |
16 | */ |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <errno.h> | |
20 | #include <pthread.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
099e26bd | 23 | #include <string.h> |
aba8e916 DG |
24 | #include <sys/stat.h> |
25 | #include <sys/types.h> | |
099e26bd | 26 | #include <unistd.h> |
0df502fd | 27 | #include <urcu/compiler.h> |
bec39940 | 28 | |
990570ed | 29 | #include <common/common.h> |
1e307fab | 30 | |
56fff090 | 31 | #include "ust-app.h" |
48842b30 | 32 | #include "ust-consumer.h" |
d80a6244 DG |
33 | #include "ust-ctl.h" |
34 | ||
55cc08a6 DG |
35 | /* |
36 | * Delete ust context safely. RCU read lock must be held before calling | |
37 | * this function. | |
38 | */ | |
39 | static | |
40 | void delete_ust_app_ctx(int sock, struct ust_app_ctx *ua_ctx) | |
41 | { | |
42 | if (ua_ctx->obj) { | |
43 | ustctl_release_object(sock, ua_ctx->obj); | |
44 | free(ua_ctx->obj); | |
45 | } | |
46 | free(ua_ctx); | |
47 | } | |
48 | ||
d80a6244 DG |
49 | /* |
50 | * Delete ust app event safely. RCU read lock must be held before calling | |
51 | * this function. | |
52 | */ | |
8b366481 DG |
53 | static |
54 | void delete_ust_app_event(int sock, struct ust_app_event *ua_event) | |
d80a6244 | 55 | { |
55cc08a6 | 56 | int ret; |
bec39940 | 57 | struct lttng_ht_iter iter; |
55cc08a6 DG |
58 | struct ust_app_ctx *ua_ctx; |
59 | ||
fc34caaa | 60 | /* Destroy each context of event */ |
bec39940 DG |
61 | cds_lfht_for_each_entry(ua_event->ctx->ht, &iter.iter, ua_ctx, |
62 | node.node) { | |
63 | ret = lttng_ht_del(ua_event->ctx, &iter); | |
55cc08a6 DG |
64 | assert(!ret); |
65 | delete_ust_app_ctx(sock, ua_ctx); | |
66 | } | |
bec39940 | 67 | lttng_ht_destroy(ua_event->ctx); |
d80a6244 | 68 | |
edb67388 DG |
69 | if (ua_event->obj != NULL) { |
70 | ustctl_release_object(sock, ua_event->obj); | |
71 | free(ua_event->obj); | |
72 | } | |
d80a6244 DG |
73 | free(ua_event); |
74 | } | |
75 | ||
76 | /* | |
77 | * Delete ust app stream safely. RCU read lock must be held before calling | |
78 | * this function. | |
79 | */ | |
8b366481 DG |
80 | static |
81 | void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream) | |
d80a6244 | 82 | { |
8b366481 DG |
83 | if (stream->obj) { |
84 | ustctl_release_object(sock, stream->obj); | |
85 | free(stream->obj); | |
86 | } | |
84cd17c6 | 87 | free(stream); |
d80a6244 DG |
88 | } |
89 | ||
90 | /* | |
91 | * Delete ust app channel safely. RCU read lock must be held before calling | |
92 | * this function. | |
93 | */ | |
8b366481 DG |
94 | static |
95 | void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan) | |
d80a6244 DG |
96 | { |
97 | int ret; | |
bec39940 | 98 | struct lttng_ht_iter iter; |
d80a6244 | 99 | struct ust_app_event *ua_event; |
55cc08a6 | 100 | struct ust_app_ctx *ua_ctx; |
d80a6244 DG |
101 | struct ltt_ust_stream *stream, *stmp; |
102 | ||
55cc08a6 | 103 | /* Wipe stream */ |
d80a6244 | 104 | cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) { |
84cd17c6 | 105 | cds_list_del(&stream->list); |
d80a6244 DG |
106 | delete_ust_app_stream(sock, stream); |
107 | } | |
108 | ||
55cc08a6 | 109 | /* Wipe context */ |
bec39940 DG |
110 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter.iter, ua_ctx, node.node) { |
111 | ret = lttng_ht_del(ua_chan->ctx, &iter); | |
55cc08a6 DG |
112 | assert(!ret); |
113 | delete_ust_app_ctx(sock, ua_ctx); | |
114 | } | |
bec39940 | 115 | lttng_ht_destroy(ua_chan->ctx); |
d80a6244 | 116 | |
55cc08a6 | 117 | /* Wipe events */ |
bec39940 DG |
118 | cds_lfht_for_each_entry(ua_chan->events->ht, &iter.iter, ua_event, |
119 | node.node) { | |
120 | ret = lttng_ht_del(ua_chan->events, &iter); | |
525b0740 | 121 | assert(!ret); |
d80a6244 DG |
122 | delete_ust_app_event(sock, ua_event); |
123 | } | |
bec39940 | 124 | lttng_ht_destroy(ua_chan->events); |
edb67388 DG |
125 | |
126 | if (ua_chan->obj != NULL) { | |
127 | ustctl_release_object(sock, ua_chan->obj); | |
128 | free(ua_chan->obj); | |
129 | } | |
84cd17c6 | 130 | free(ua_chan); |
d80a6244 DG |
131 | } |
132 | ||
133 | /* | |
134 | * Delete ust app session safely. RCU read lock must be held before calling | |
135 | * this function. | |
136 | */ | |
8b366481 DG |
137 | static |
138 | void delete_ust_app_session(int sock, struct ust_app_session *ua_sess) | |
d80a6244 DG |
139 | { |
140 | int ret; | |
bec39940 | 141 | struct lttng_ht_iter iter; |
d80a6244 DG |
142 | struct ust_app_channel *ua_chan; |
143 | ||
144 | if (ua_sess->metadata) { | |
8b366481 DG |
145 | if (ua_sess->metadata->stream_obj) { |
146 | ustctl_release_object(sock, ua_sess->metadata->stream_obj); | |
147 | free(ua_sess->metadata->stream_obj); | |
148 | } | |
149 | if (ua_sess->metadata->obj) { | |
150 | ustctl_release_object(sock, ua_sess->metadata->obj); | |
151 | free(ua_sess->metadata->obj); | |
152 | } | |
d80a6244 DG |
153 | } |
154 | ||
bec39940 DG |
155 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
156 | node.node) { | |
157 | ret = lttng_ht_del(ua_sess->channels, &iter); | |
525b0740 | 158 | assert(!ret); |
d80a6244 DG |
159 | delete_ust_app_channel(sock, ua_chan); |
160 | } | |
bec39940 | 161 | lttng_ht_destroy(ua_sess->channels); |
d80a6244 | 162 | |
aee6bafd MD |
163 | if (ua_sess->handle != -1) { |
164 | ustctl_release_handle(sock, ua_sess->handle); | |
165 | } | |
8b366481 | 166 | free(ua_sess); |
d80a6244 | 167 | } |
91d76f53 DG |
168 | |
169 | /* | |
284d8f55 DG |
170 | * Delete a traceable application structure from the global list. Never call |
171 | * this function outside of a call_rcu call. | |
91d76f53 | 172 | */ |
8b366481 DG |
173 | static |
174 | void delete_ust_app(struct ust_app *app) | |
91d76f53 | 175 | { |
8b366481 | 176 | int ret, sock; |
bec39940 | 177 | struct lttng_ht_iter iter; |
284d8f55 | 178 | struct ust_app_session *ua_sess; |
44d3bd01 | 179 | |
f6a9efaa | 180 | rcu_read_lock(); |
44d3bd01 | 181 | |
d80a6244 | 182 | /* Delete ust app sessions info */ |
6414a713 MD |
183 | sock = app->key.sock; |
184 | app->key.sock = -1; | |
d80a6244 | 185 | |
8b366481 | 186 | /* Wipe sessions */ |
bec39940 DG |
187 | cds_lfht_for_each_entry(app->sessions->ht, &iter.iter, ua_sess, |
188 | node.node) { | |
189 | ret = lttng_ht_del(app->sessions, &iter); | |
525b0740 | 190 | assert(!ret); |
284d8f55 | 191 | delete_ust_app_session(app->key.sock, ua_sess); |
d80a6244 | 192 | } |
bec39940 | 193 | lttng_ht_destroy(app->sessions); |
d80a6244 | 194 | |
6414a713 | 195 | /* |
bec39940 DG |
196 | * Wait until we have removed the key from the sock hash table before |
197 | * closing this socket, otherwise an application could re-use the socket ID | |
198 | * and race with the teardown, using the same hash table entry. | |
6414a713 | 199 | */ |
799e2c4f MD |
200 | ret = close(sock); |
201 | if (ret) { | |
202 | PERROR("close"); | |
203 | } | |
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 | ||
727d5404 | 398 | DBG2("UST app context created successfully for channel %s", ua_chan->name); |
55cc08a6 DG |
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 | ||
727d5404 | 421 | DBG2("UST app context created successfully for event %s", ua_event->name); |
55cc08a6 DG |
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); |
915d047c DG |
870 | /* This means that the tracer is gone... */ |
871 | ua_sess = (void*) -1UL; | |
421cb601 DG |
872 | goto error; |
873 | } | |
874 | ||
421cb601 DG |
875 | ua_sess->handle = ret; |
876 | ||
877 | /* Add ust app session to app's HT */ | |
2c348c10 | 878 | lttng_ht_node_init_ulong(&ua_sess->node, (unsigned long) ua_sess->id); |
bec39940 | 879 | lttng_ht_add_unique_ulong(app->sessions, &ua_sess->node); |
421cb601 DG |
880 | |
881 | DBG2("UST app session created successfully with handle %d", ret); | |
882 | } | |
883 | ||
fc34caaa | 884 | end: |
421cb601 DG |
885 | return ua_sess; |
886 | ||
887 | error: | |
fc34caaa | 888 | delete_ust_app_session(-1, ua_sess); |
421cb601 DG |
889 | return NULL; |
890 | } | |
891 | ||
55cc08a6 DG |
892 | /* |
893 | * Create a context for the channel on the tracer. | |
894 | */ | |
895 | static | |
896 | int create_ust_app_channel_context(struct ust_app_session *ua_sess, | |
897 | struct ust_app_channel *ua_chan, struct lttng_ust_context *uctx, | |
898 | struct ust_app *app) | |
899 | { | |
900 | int ret = 0; | |
bec39940 DG |
901 | struct lttng_ht_iter iter; |
902 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
903 | struct ust_app_ctx *ua_ctx; |
904 | ||
905 | DBG2("UST app adding context to channel %s", ua_chan->name); | |
906 | ||
bec39940 DG |
907 | lttng_ht_lookup(ua_chan->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
908 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
909 | if (node != NULL) { |
910 | ret = -EEXIST; | |
911 | goto error; | |
912 | } | |
913 | ||
914 | ua_ctx = alloc_ust_app_ctx(uctx); | |
915 | if (ua_ctx == NULL) { | |
916 | /* malloc failed */ | |
917 | ret = -1; | |
918 | goto error; | |
919 | } | |
920 | ||
bec39940 DG |
921 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
922 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 DG |
923 | |
924 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
925 | if (ret < 0) { | |
926 | goto error; | |
927 | } | |
928 | ||
929 | error: | |
930 | return ret; | |
931 | } | |
932 | ||
933 | /* | |
934 | * Create an UST context and enable it for the event on the tracer. | |
935 | */ | |
936 | static | |
937 | int create_ust_app_event_context(struct ust_app_session *ua_sess, | |
938 | struct ust_app_event *ua_event, struct lttng_ust_context *uctx, | |
939 | struct ust_app *app) | |
940 | { | |
941 | int ret = 0; | |
bec39940 DG |
942 | struct lttng_ht_iter iter; |
943 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
944 | struct ust_app_ctx *ua_ctx; |
945 | ||
946 | DBG2("UST app adding context to event %s", ua_event->name); | |
947 | ||
bec39940 DG |
948 | lttng_ht_lookup(ua_event->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
949 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
950 | if (node != NULL) { |
951 | ret = -EEXIST; | |
952 | goto error; | |
953 | } | |
954 | ||
955 | ua_ctx = alloc_ust_app_ctx(uctx); | |
956 | if (ua_ctx == NULL) { | |
957 | /* malloc failed */ | |
958 | ret = -1; | |
959 | goto error; | |
960 | } | |
961 | ||
bec39940 DG |
962 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
963 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 DG |
964 | |
965 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
966 | if (ret < 0) { | |
967 | goto error; | |
968 | } | |
969 | ||
970 | error: | |
971 | return ret; | |
972 | } | |
973 | ||
edb67388 DG |
974 | /* |
975 | * Enable on the tracer side a ust app event for the session and channel. | |
976 | */ | |
977 | static | |
978 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 979 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
980 | { |
981 | int ret; | |
982 | ||
983 | ret = enable_ust_event(app, ua_sess, ua_event); | |
984 | if (ret < 0) { | |
985 | goto error; | |
986 | } | |
987 | ||
988 | ua_event->enabled = 1; | |
989 | ||
990 | error: | |
991 | return ret; | |
992 | } | |
993 | ||
9730260e DG |
994 | /* |
995 | * Disable on the tracer side a ust app event for the session and channel. | |
996 | */ | |
997 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
7f79d3a1 | 998 | struct ust_app_event *ua_event, struct ust_app *app) |
9730260e DG |
999 | { |
1000 | int ret; | |
1001 | ||
1002 | ret = disable_ust_event(app, ua_sess, ua_event); | |
1003 | if (ret < 0) { | |
1004 | goto error; | |
1005 | } | |
1006 | ||
1007 | ua_event->enabled = 0; | |
1008 | ||
1009 | error: | |
1010 | return ret; | |
1011 | } | |
1012 | ||
78f0bacd DG |
1013 | /* |
1014 | * Lookup ust app channel for session and disable it on the tracer side. | |
1015 | */ | |
8535a6d9 DG |
1016 | static |
1017 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
1018 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 1019 | { |
8535a6d9 | 1020 | int ret; |
78f0bacd DG |
1021 | |
1022 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
1023 | if (ret < 0) { | |
1024 | goto error; | |
1025 | } | |
1026 | ||
8535a6d9 DG |
1027 | ua_chan->enabled = 0; |
1028 | ||
78f0bacd DG |
1029 | error: |
1030 | return ret; | |
1031 | } | |
1032 | ||
1033 | /* | |
1034 | * Lookup ust app channel for session and enable it on the tracer side. | |
1035 | */ | |
1036 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
1037 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
1038 | { | |
1039 | int ret = 0; | |
bec39940 DG |
1040 | struct lttng_ht_iter iter; |
1041 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1042 | struct ust_app_channel *ua_chan; |
1043 | ||
bec39940 DG |
1044 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1045 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
78f0bacd | 1046 | if (ua_chan_node == NULL) { |
a991f516 MD |
1047 | DBG2("Unable to find channel %s in ust session id %u", |
1048 | uchan->name, ua_sess->id); | |
78f0bacd DG |
1049 | goto error; |
1050 | } | |
1051 | ||
1052 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1053 | ||
1054 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
1055 | if (ret < 0) { | |
1056 | goto error; | |
1057 | } | |
1058 | ||
1059 | error: | |
1060 | return ret; | |
1061 | } | |
1062 | ||
284d8f55 | 1063 | /* |
5b4a0ec0 | 1064 | * Create UST app channel and create it on the tracer. |
284d8f55 | 1065 | */ |
5b4a0ec0 DG |
1066 | static struct ust_app_channel *create_ust_app_channel( |
1067 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
1068 | struct ust_app *app) | |
1069 | { | |
1070 | int ret = 0; | |
bec39940 DG |
1071 | struct lttng_ht_iter iter; |
1072 | struct lttng_ht_node_str *ua_chan_node; | |
5b4a0ec0 DG |
1073 | struct ust_app_channel *ua_chan; |
1074 | ||
1075 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1076 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1077 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
fc34caaa | 1078 | if (ua_chan_node != NULL) { |
5b4a0ec0 | 1079 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
fc34caaa | 1080 | goto end; |
5b4a0ec0 DG |
1081 | } |
1082 | ||
fc34caaa DG |
1083 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); |
1084 | if (ua_chan == NULL) { | |
1085 | /* Only malloc can fail here */ | |
1086 | goto error; | |
1087 | } | |
1088 | shadow_copy_channel(ua_chan, uchan); | |
1089 | ||
5b4a0ec0 DG |
1090 | ret = create_ust_channel(app, ua_sess, ua_chan); |
1091 | if (ret < 0) { | |
fc34caaa DG |
1092 | /* Not found previously means that it does not exist on the tracer */ |
1093 | assert(ret != -EEXIST); | |
5b4a0ec0 DG |
1094 | goto error; |
1095 | } | |
1096 | ||
58f3ca76 DG |
1097 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
1098 | ||
fc34caaa DG |
1099 | DBG2("UST app create channel %s for PID %d completed", ua_chan->name, |
1100 | app->key.pid); | |
1101 | ||
1102 | end: | |
5b4a0ec0 DG |
1103 | return ua_chan; |
1104 | ||
1105 | error: | |
fc34caaa | 1106 | delete_ust_app_channel(-1, ua_chan); |
5b4a0ec0 DG |
1107 | return NULL; |
1108 | } | |
1109 | ||
1110 | /* | |
1111 | * Create UST app event and create it on the tracer side. | |
1112 | */ | |
edb67388 DG |
1113 | static |
1114 | int create_ust_app_event(struct ust_app_session *ua_sess, | |
1115 | struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent, | |
1116 | struct ust_app *app) | |
284d8f55 | 1117 | { |
edb67388 | 1118 | int ret = 0; |
bec39940 DG |
1119 | struct lttng_ht_iter iter; |
1120 | struct lttng_ht_node_str *ua_event_node; | |
5b4a0ec0 | 1121 | struct ust_app_event *ua_event; |
284d8f55 | 1122 | |
5b4a0ec0 | 1123 | /* Get event node */ |
bec39940 DG |
1124 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
1125 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
edb67388 | 1126 | if (ua_event_node != NULL) { |
fc34caaa | 1127 | ret = -EEXIST; |
edb67388 DG |
1128 | goto end; |
1129 | } | |
5b4a0ec0 | 1130 | |
edb67388 DG |
1131 | /* Does not exist so create one */ |
1132 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
1133 | if (ua_event == NULL) { | |
1134 | /* Only malloc can failed so something is really wrong */ | |
1135 | ret = -ENOMEM; | |
fc34caaa | 1136 | goto end; |
5b4a0ec0 | 1137 | } |
edb67388 | 1138 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 1139 | |
edb67388 | 1140 | /* Create it on the tracer side */ |
5b4a0ec0 | 1141 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 1142 | if (ret < 0) { |
fc34caaa DG |
1143 | /* Not found previously means that it does not exist on the tracer */ |
1144 | assert(ret != -EEXIST); | |
284d8f55 DG |
1145 | goto error; |
1146 | } | |
1147 | ||
bec39940 | 1148 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
284d8f55 | 1149 | |
fc34caaa DG |
1150 | DBG2("UST app create event %s for PID %d completed", ua_event->name, |
1151 | app->key.pid); | |
7f79d3a1 | 1152 | |
edb67388 | 1153 | end: |
fc34caaa DG |
1154 | return ret; |
1155 | ||
5b4a0ec0 | 1156 | error: |
fc34caaa DG |
1157 | /* Valid. Calling here is already in a read side lock */ |
1158 | delete_ust_app_event(-1, ua_event); | |
edb67388 | 1159 | return ret; |
5b4a0ec0 DG |
1160 | } |
1161 | ||
1162 | /* | |
1163 | * Create UST metadata and open it on the tracer side. | |
1164 | */ | |
1165 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
1166 | char *pathname, struct ust_app *app) | |
1167 | { | |
1168 | int ret = 0; | |
1169 | ||
1170 | if (ua_sess->metadata == NULL) { | |
1171 | /* Allocate UST metadata */ | |
1172 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
1173 | if (ua_sess->metadata == NULL) { | |
fc34caaa | 1174 | /* malloc() failed */ |
5b4a0ec0 DG |
1175 | goto error; |
1176 | } | |
1177 | ||
1178 | ret = open_ust_metadata(app, ua_sess); | |
1179 | if (ret < 0) { | |
7db205b5 DG |
1180 | DBG3("Opening metadata failed. Cleaning up memory"); |
1181 | ||
fc34caaa DG |
1182 | /* Cleanup failed metadata struct */ |
1183 | free(ua_sess->metadata); | |
7db205b5 DG |
1184 | /* |
1185 | * This is very important because delete_ust_app_session check if | |
1186 | * the pointer is null or not in order to delete the metadata. | |
1187 | */ | |
1188 | ua_sess->metadata = NULL; | |
5b4a0ec0 DG |
1189 | goto error; |
1190 | } | |
1191 | ||
1192 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
1193 | } | |
1194 | ||
1195 | /* Open UST metadata stream */ | |
1196 | if (ua_sess->metadata->stream_obj == NULL) { | |
1197 | ret = create_ust_stream(app, ua_sess); | |
1198 | if (ret < 0) { | |
1199 | goto error; | |
1200 | } | |
1201 | ||
e11d277b | 1202 | ret = run_as_mkdir(ua_sess->path, S_IRWXU | S_IRWXG, |
67f747d8 | 1203 | ua_sess->uid, ua_sess->gid); |
5b4a0ec0 DG |
1204 | if (ret < 0) { |
1205 | PERROR("mkdir UST metadata"); | |
1206 | goto error; | |
1207 | } | |
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 | */ | |
bec39940 | 1232 | struct lttng_ht *ust_app_get_ht(void) |
5b4a0ec0 DG |
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 | { | |
bec39940 DG |
1242 | struct lttng_ht_node_ulong *node; |
1243 | struct lttng_ht_iter iter; | |
5b4a0ec0 DG |
1244 | |
1245 | rcu_read_lock(); | |
bec39940 DG |
1246 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) pid), &iter); |
1247 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
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; | |
799e2c4f | 1273 | int ret; |
5b4a0ec0 | 1274 | |
7753dea8 MD |
1275 | if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL) |
1276 | || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) { | |
f943b0fb | 1277 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1278 | "%d-bit long, but no consumerd for this long size is available.\n", |
1279 | msg->name, msg->pid, msg->bits_per_long); | |
799e2c4f MD |
1280 | ret = close(sock); |
1281 | if (ret) { | |
1282 | PERROR("close"); | |
1283 | } | |
0df502fd MD |
1284 | return -EINVAL; |
1285 | } | |
3f2c5fcc MD |
1286 | if (msg->major != LTTNG_UST_COMM_MAJOR) { |
1287 | ERR("Registration failed: application \"%s\" (pid: %d) has " | |
1288 | "communication protocol version %u.%u, but sessiond supports 2.x.\n", | |
1289 | msg->name, msg->pid, msg->major, msg->minor); | |
799e2c4f MD |
1290 | ret = close(sock); |
1291 | if (ret) { | |
1292 | PERROR("close"); | |
1293 | } | |
3f2c5fcc MD |
1294 | return -EINVAL; |
1295 | } | |
5b4a0ec0 DG |
1296 | lta = zmalloc(sizeof(struct ust_app)); |
1297 | if (lta == NULL) { | |
1298 | PERROR("malloc"); | |
1299 | return -ENOMEM; | |
1300 | } | |
1301 | ||
1302 | lta->ppid = msg->ppid; | |
1303 | lta->uid = msg->uid; | |
1304 | lta->gid = msg->gid; | |
e0c7ec2b | 1305 | lta->compatible = 0; /* Not compatible until proven */ |
7753dea8 | 1306 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1307 | lta->v_major = msg->major; |
1308 | lta->v_minor = msg->minor; | |
1309 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1310 | lta->name[16] = '\0'; | |
bec39940 | 1311 | lta->sessions = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
5b4a0ec0 DG |
1312 | |
1313 | /* Set key map */ | |
1314 | lta->key.pid = msg->pid; | |
bec39940 | 1315 | lttng_ht_node_init_ulong(<a->node, (unsigned long)lta->key.pid); |
5b4a0ec0 | 1316 | lta->key.sock = sock; |
bec39940 | 1317 | lttng_ht_node_init_ulong(<a->key.node, (unsigned long)lta->key.sock); |
5b4a0ec0 DG |
1318 | |
1319 | rcu_read_lock(); | |
bec39940 DG |
1320 | lttng_ht_add_unique_ulong(ust_app_sock_key_map, <a->key.node); |
1321 | lttng_ht_add_unique_ulong(ust_app_ht, <a->node); | |
5b4a0ec0 DG |
1322 | rcu_read_unlock(); |
1323 | ||
1324 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
1325 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, | |
1326 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
1327 | ||
1328 | return 0; | |
1329 | } | |
1330 | ||
1331 | /* | |
1332 | * Unregister app by removing it from the global traceable app list and freeing | |
1333 | * the data struct. | |
1334 | * | |
1335 | * The socket is already closed at this point so no close to sock. | |
1336 | */ | |
1337 | void ust_app_unregister(int sock) | |
1338 | { | |
1339 | struct ust_app *lta; | |
bec39940 DG |
1340 | struct lttng_ht_node_ulong *node; |
1341 | struct lttng_ht_iter iter; | |
525b0740 | 1342 | int ret; |
5b4a0ec0 DG |
1343 | |
1344 | rcu_read_lock(); | |
1345 | lta = find_app_by_sock(sock); | |
1346 | if (lta == NULL) { | |
1347 | ERR("Unregister app sock %d not found!", sock); | |
1348 | goto error; | |
1349 | } | |
1350 | ||
1351 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
1352 | ||
886459c6 MD |
1353 | /* Remove application from socket hash table */ |
1354 | lttng_ht_lookup(ust_app_sock_key_map, (void *)((unsigned long) sock), &iter); | |
1355 | ret = lttng_ht_del(ust_app_sock_key_map, &iter); | |
1356 | assert(!ret); | |
1357 | ||
5b4a0ec0 | 1358 | /* Get the node reference for a call_rcu */ |
bec39940 DG |
1359 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) lta->key.pid), &iter); |
1360 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1361 | if (node == NULL) { |
1362 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
1363 | goto error; | |
1364 | } | |
284d8f55 | 1365 | |
886459c6 | 1366 | /* Remove application from PID hash table */ |
bec39940 | 1367 | ret = lttng_ht_del(ust_app_ht, &iter); |
525b0740 | 1368 | assert(!ret); |
5b4a0ec0 | 1369 | call_rcu(&node->head, delete_ust_app_rcu); |
284d8f55 | 1370 | error: |
5b4a0ec0 DG |
1371 | rcu_read_unlock(); |
1372 | return; | |
284d8f55 DG |
1373 | } |
1374 | ||
1375 | /* | |
5b4a0ec0 | 1376 | * Return traceable_app_count |
284d8f55 | 1377 | */ |
5b4a0ec0 | 1378 | unsigned long ust_app_list_count(void) |
284d8f55 | 1379 | { |
5b4a0ec0 | 1380 | unsigned long count; |
284d8f55 | 1381 | |
5b4a0ec0 | 1382 | rcu_read_lock(); |
bec39940 | 1383 | count = lttng_ht_get_count(ust_app_ht); |
5b4a0ec0 | 1384 | rcu_read_unlock(); |
284d8f55 | 1385 | |
5b4a0ec0 | 1386 | return count; |
284d8f55 DG |
1387 | } |
1388 | ||
5b4a0ec0 DG |
1389 | /* |
1390 | * Fill events array with all events name of all registered apps. | |
1391 | */ | |
1392 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1393 | { |
5b4a0ec0 DG |
1394 | int ret, handle; |
1395 | size_t nbmem, count = 0; | |
bec39940 | 1396 | struct lttng_ht_iter iter; |
5b4a0ec0 DG |
1397 | struct ust_app *app; |
1398 | struct lttng_event *tmp; | |
421cb601 | 1399 | |
5b4a0ec0 DG |
1400 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1401 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1402 | if (tmp == NULL) { | |
1403 | PERROR("zmalloc ust app events"); | |
1404 | ret = -ENOMEM; | |
421cb601 DG |
1405 | goto error; |
1406 | } | |
1407 | ||
5b4a0ec0 | 1408 | rcu_read_lock(); |
421cb601 | 1409 | |
bec39940 | 1410 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
90eaa0d2 | 1411 | struct lttng_ust_tracepoint_iter uiter; |
ac3bd9c0 | 1412 | |
e0c7ec2b DG |
1413 | if (!app->compatible) { |
1414 | /* | |
1415 | * TODO: In time, we should notice the caller of this error by | |
1416 | * telling him that this is a version error. | |
1417 | */ | |
1418 | continue; | |
1419 | } | |
5b4a0ec0 DG |
1420 | handle = ustctl_tracepoint_list(app->key.sock); |
1421 | if (handle < 0) { | |
1422 | ERR("UST app list events getting handle failed for app pid %d", | |
1423 | app->key.pid); | |
1424 | continue; | |
1425 | } | |
421cb601 | 1426 | |
5b4a0ec0 | 1427 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, |
90eaa0d2 | 1428 | &uiter)) != -ENOENT) { |
815564d8 MD |
1429 | if (count >= nbmem) { |
1430 | DBG2("Reallocating event list from %zu to %zu entries", nbmem, | |
1431 | 2 * nbmem); | |
1432 | nbmem *= 2; | |
2f221590 | 1433 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event)); |
5b4a0ec0 DG |
1434 | if (tmp == NULL) { |
1435 | PERROR("realloc ust app events"); | |
1436 | ret = -ENOMEM; | |
1437 | goto rcu_error; | |
1438 | } | |
1439 | } | |
90eaa0d2 | 1440 | memcpy(tmp[count].name, uiter.name, LTTNG_UST_SYM_NAME_LEN); |
8005f29a | 1441 | tmp[count].loglevel = uiter.loglevel; |
69892bbb | 1442 | tmp[count].type = LTTNG_UST_TRACEPOINT; |
5b4a0ec0 DG |
1443 | tmp[count].pid = app->key.pid; |
1444 | tmp[count].enabled = -1; | |
1445 | count++; | |
421cb601 | 1446 | } |
421cb601 DG |
1447 | } |
1448 | ||
5b4a0ec0 DG |
1449 | ret = count; |
1450 | *events = tmp; | |
421cb601 | 1451 | |
5b4a0ec0 | 1452 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1453 | |
5b4a0ec0 DG |
1454 | rcu_error: |
1455 | rcu_read_unlock(); | |
421cb601 | 1456 | error: |
5b4a0ec0 | 1457 | return ret; |
421cb601 DG |
1458 | } |
1459 | ||
5b4a0ec0 DG |
1460 | /* |
1461 | * Free and clean all traceable apps of the global list. | |
1462 | */ | |
1463 | void ust_app_clean_list(void) | |
421cb601 | 1464 | { |
5b4a0ec0 | 1465 | int ret; |
bec39940 DG |
1466 | struct lttng_ht_iter iter; |
1467 | struct lttng_ht_node_ulong *node; | |
421cb601 | 1468 | |
5b4a0ec0 | 1469 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1470 | |
5b4a0ec0 | 1471 | rcu_read_lock(); |
421cb601 | 1472 | |
bec39940 DG |
1473 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, node, node) { |
1474 | ret = lttng_ht_del(ust_app_ht, &iter); | |
525b0740 | 1475 | assert(!ret); |
bec39940 | 1476 | call_rcu(&node->head, delete_ust_app_rcu); |
421cb601 | 1477 | } |
bec39940 DG |
1478 | /* Destroy is done only when the ht is empty */ |
1479 | lttng_ht_destroy(ust_app_ht); | |
421cb601 | 1480 | |
bec39940 DG |
1481 | cds_lfht_for_each_entry(ust_app_sock_key_map->ht, &iter.iter, node, node) { |
1482 | ret = lttng_ht_del(ust_app_sock_key_map, &iter); | |
1483 | assert(!ret); | |
1484 | } | |
1485 | /* Destroy is done only when the ht is empty */ | |
1486 | lttng_ht_destroy(ust_app_sock_key_map); | |
421cb601 | 1487 | |
5b4a0ec0 DG |
1488 | rcu_read_unlock(); |
1489 | } | |
1490 | ||
1491 | /* | |
1492 | * Init UST app hash table. | |
1493 | */ | |
1494 | void ust_app_ht_alloc(void) | |
1495 | { | |
bec39940 DG |
1496 | ust_app_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1497 | ust_app_sock_key_map = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
421cb601 DG |
1498 | } |
1499 | ||
78f0bacd DG |
1500 | /* |
1501 | * For a specific UST session, disable the channel for all registered apps. | |
1502 | */ | |
35a9059d | 1503 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1504 | struct ltt_ust_channel *uchan) |
1505 | { | |
1506 | int ret = 0; | |
bec39940 DG |
1507 | struct lttng_ht_iter iter; |
1508 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1509 | struct ust_app *app; |
1510 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1511 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1512 | |
1513 | if (usess == NULL || uchan == NULL) { | |
1514 | ERR("Disabling UST global channel with NULL values"); | |
1515 | ret = -1; | |
1516 | goto error; | |
1517 | } | |
1518 | ||
a991f516 MD |
1519 | DBG2("UST app disabling channel %s from global domain for session id %d", |
1520 | uchan->name, usess->id); | |
78f0bacd DG |
1521 | |
1522 | rcu_read_lock(); | |
1523 | ||
1524 | /* For every registered applications */ | |
bec39940 DG |
1525 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
1526 | struct lttng_ht_iter uiter; | |
e0c7ec2b DG |
1527 | if (!app->compatible) { |
1528 | /* | |
1529 | * TODO: In time, we should notice the caller of this error by | |
1530 | * telling him that this is a version error. | |
1531 | */ | |
1532 | continue; | |
1533 | } | |
78f0bacd DG |
1534 | ua_sess = lookup_session_by_app(usess, app); |
1535 | if (ua_sess == NULL) { | |
1536 | continue; | |
1537 | } | |
1538 | ||
8535a6d9 | 1539 | /* Get channel */ |
bec39940 DG |
1540 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1541 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
8535a6d9 DG |
1542 | /* If the session if found for the app, the channel must be there */ |
1543 | assert(ua_chan_node); | |
1544 | ||
1545 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1546 | /* The channel must not be already disabled */ | |
1547 | assert(ua_chan->enabled == 1); | |
1548 | ||
1549 | /* Disable channel onto application */ | |
1550 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1551 | if (ret < 0) { |
1552 | /* XXX: We might want to report this error at some point... */ | |
1553 | continue; | |
1554 | } | |
1555 | } | |
1556 | ||
1557 | rcu_read_unlock(); | |
1558 | ||
1559 | error: | |
1560 | return ret; | |
1561 | } | |
1562 | ||
1563 | /* | |
1564 | * For a specific UST session, enable the channel for all registered apps. | |
1565 | */ | |
35a9059d | 1566 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1567 | struct ltt_ust_channel *uchan) |
1568 | { | |
1569 | int ret = 0; | |
bec39940 | 1570 | struct lttng_ht_iter iter; |
78f0bacd DG |
1571 | struct ust_app *app; |
1572 | struct ust_app_session *ua_sess; | |
1573 | ||
1574 | if (usess == NULL || uchan == NULL) { | |
1575 | ERR("Adding UST global channel to NULL values"); | |
1576 | ret = -1; | |
1577 | goto error; | |
1578 | } | |
1579 | ||
a991f516 MD |
1580 | DBG2("UST app enabling channel %s to global domain for session id %d", |
1581 | uchan->name, usess->id); | |
78f0bacd DG |
1582 | |
1583 | rcu_read_lock(); | |
1584 | ||
1585 | /* For every registered applications */ | |
bec39940 | 1586 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
e0c7ec2b DG |
1587 | if (!app->compatible) { |
1588 | /* | |
1589 | * TODO: In time, we should notice the caller of this error by | |
1590 | * telling him that this is a version error. | |
1591 | */ | |
1592 | continue; | |
1593 | } | |
78f0bacd DG |
1594 | ua_sess = lookup_session_by_app(usess, app); |
1595 | if (ua_sess == NULL) { | |
1596 | continue; | |
1597 | } | |
1598 | ||
1599 | /* Enable channel onto application */ | |
1600 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1601 | if (ret < 0) { | |
1602 | /* XXX: We might want to report this error at some point... */ | |
1603 | continue; | |
1604 | } | |
1605 | } | |
1606 | ||
1607 | rcu_read_unlock(); | |
1608 | ||
1609 | error: | |
1610 | return ret; | |
1611 | } | |
1612 | ||
b0a40d28 DG |
1613 | /* |
1614 | * Disable an event in a channel and for a specific session. | |
1615 | */ | |
35a9059d DG |
1616 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
1617 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
1618 | { |
1619 | int ret = 0; | |
bec39940 DG |
1620 | struct lttng_ht_iter iter, uiter; |
1621 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
b0a40d28 DG |
1622 | struct ust_app *app; |
1623 | struct ust_app_session *ua_sess; | |
1624 | struct ust_app_channel *ua_chan; | |
1625 | struct ust_app_event *ua_event; | |
1626 | ||
1627 | DBG("UST app disabling event %s for all apps in channel " | |
a991f516 | 1628 | "%s for session id %d", uevent->attr.name, uchan->name, usess->id); |
b0a40d28 DG |
1629 | |
1630 | rcu_read_lock(); | |
1631 | ||
1632 | /* For all registered applications */ | |
bec39940 | 1633 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
e0c7ec2b DG |
1634 | if (!app->compatible) { |
1635 | /* | |
1636 | * TODO: In time, we should notice the caller of this error by | |
1637 | * telling him that this is a version error. | |
1638 | */ | |
1639 | continue; | |
1640 | } | |
b0a40d28 DG |
1641 | ua_sess = lookup_session_by_app(usess, app); |
1642 | if (ua_sess == NULL) { | |
1643 | /* Next app */ | |
1644 | continue; | |
1645 | } | |
1646 | ||
1647 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1648 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1649 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 | 1650 | if (ua_chan_node == NULL) { |
a991f516 MD |
1651 | DBG2("Channel %s not found in session id %d for app pid %d." |
1652 | "Skipping", uchan->name, usess->id, app->key.pid); | |
b0a40d28 DG |
1653 | continue; |
1654 | } | |
1655 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1656 | ||
bec39940 DG |
1657 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
1658 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 DG |
1659 | if (ua_event_node == NULL) { |
1660 | DBG2("Event %s not found in channel %s for app pid %d." | |
35a9059d | 1661 | "Skipping", uevent->attr.name, uchan->name, app->key.pid); |
b0a40d28 DG |
1662 | continue; |
1663 | } | |
1664 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1665 | ||
7f79d3a1 | 1666 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
b0a40d28 DG |
1667 | if (ret < 0) { |
1668 | /* XXX: Report error someday... */ | |
1669 | continue; | |
1670 | } | |
1671 | } | |
1672 | ||
1673 | rcu_read_unlock(); | |
1674 | ||
1675 | return ret; | |
1676 | } | |
1677 | ||
9730260e | 1678 | /* |
edb67388 | 1679 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
1680 | * registered apps. |
1681 | */ | |
35a9059d | 1682 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
1683 | struct ltt_ust_channel *uchan) |
1684 | { | |
1685 | int ret = 0; | |
bec39940 DG |
1686 | struct lttng_ht_iter iter, uiter; |
1687 | struct lttng_ht_node_str *ua_chan_node; | |
9730260e DG |
1688 | struct ust_app *app; |
1689 | struct ust_app_session *ua_sess; | |
1690 | struct ust_app_channel *ua_chan; | |
1691 | struct ust_app_event *ua_event; | |
1692 | ||
1693 | DBG("UST app disabling all event for all apps in channel " | |
a991f516 | 1694 | "%s for session id %d", uchan->name, usess->id); |
9730260e DG |
1695 | |
1696 | rcu_read_lock(); | |
1697 | ||
1698 | /* For all registered applications */ | |
bec39940 | 1699 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
e0c7ec2b DG |
1700 | if (!app->compatible) { |
1701 | /* | |
1702 | * TODO: In time, we should notice the caller of this error by | |
1703 | * telling him that this is a version error. | |
1704 | */ | |
1705 | continue; | |
1706 | } | |
9730260e | 1707 | ua_sess = lookup_session_by_app(usess, app); |
edb67388 DG |
1708 | /* If ua_sess is NULL, there is a code flow error */ |
1709 | assert(ua_sess); | |
9730260e DG |
1710 | |
1711 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1712 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1713 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1714 | /* If the channel is not found, there is a code flow error */ |
1715 | assert(ua_chan_node); | |
1716 | ||
9730260e DG |
1717 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1718 | ||
1719 | /* Disable each events of channel */ | |
bec39940 DG |
1720 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
1721 | node.node) { | |
7f79d3a1 | 1722 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
9730260e DG |
1723 | if (ret < 0) { |
1724 | /* XXX: Report error someday... */ | |
1725 | continue; | |
1726 | } | |
1727 | } | |
1728 | } | |
1729 | ||
1730 | rcu_read_unlock(); | |
1731 | ||
1732 | return ret; | |
1733 | } | |
1734 | ||
421cb601 | 1735 | /* |
5b4a0ec0 | 1736 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1737 | */ |
35a9059d | 1738 | int ust_app_create_channel_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1739 | struct ltt_ust_channel *uchan) |
1740 | { | |
bec39940 | 1741 | struct lttng_ht_iter iter; |
48842b30 DG |
1742 | struct ust_app *app; |
1743 | struct ust_app_session *ua_sess; | |
1744 | struct ust_app_channel *ua_chan; | |
1745 | ||
fc34caaa DG |
1746 | /* Very wrong code flow */ |
1747 | assert(usess); | |
1748 | assert(uchan); | |
421cb601 | 1749 | |
a991f516 MD |
1750 | DBG2("UST app adding channel %s to global domain for session id %d", |
1751 | uchan->name, usess->id); | |
48842b30 DG |
1752 | |
1753 | rcu_read_lock(); | |
421cb601 | 1754 | |
5b4a0ec0 | 1755 | /* For every registered applications */ |
bec39940 | 1756 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
e0c7ec2b DG |
1757 | if (!app->compatible) { |
1758 | /* | |
1759 | * TODO: In time, we should notice the caller of this error by | |
1760 | * telling him that this is a version error. | |
1761 | */ | |
1762 | continue; | |
1763 | } | |
edb67388 DG |
1764 | /* |
1765 | * Create session on the tracer side and add it to app session HT. Note | |
1766 | * that if session exist, it will simply return a pointer to the ust | |
1767 | * app session. | |
1768 | */ | |
421cb601 | 1769 | ua_sess = create_ust_app_session(usess, app); |
509cbaf8 | 1770 | if (ua_sess == NULL) { |
915d047c | 1771 | /* The malloc() failed. */ |
fc34caaa | 1772 | goto error; |
915d047c DG |
1773 | } else if (ua_sess == (void *) -1UL) { |
1774 | /* The application's socket is not valid. Contiuing */ | |
1775 | continue; | |
48842b30 DG |
1776 | } |
1777 | ||
421cb601 DG |
1778 | /* Create channel onto application */ |
1779 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1780 | if (ua_chan == NULL) { | |
fc34caaa DG |
1781 | /* Major problem here and it's maybe the tracer or malloc() */ |
1782 | goto error; | |
48842b30 | 1783 | } |
48842b30 | 1784 | } |
5b4a0ec0 | 1785 | |
48842b30 DG |
1786 | rcu_read_unlock(); |
1787 | ||
fc34caaa DG |
1788 | return 0; |
1789 | ||
421cb601 | 1790 | error: |
fc34caaa | 1791 | return -1; |
48842b30 DG |
1792 | } |
1793 | ||
5b4a0ec0 | 1794 | /* |
edb67388 | 1795 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 1796 | */ |
35a9059d | 1797 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1798 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1799 | { | |
1800 | int ret = 0; | |
bec39940 DG |
1801 | struct lttng_ht_iter iter, uiter; |
1802 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
48842b30 DG |
1803 | struct ust_app *app; |
1804 | struct ust_app_session *ua_sess; | |
1805 | struct ust_app_channel *ua_chan; | |
1806 | struct ust_app_event *ua_event; | |
48842b30 | 1807 | |
a991f516 MD |
1808 | DBG("UST app enabling event %s for all apps for session id %d", |
1809 | uevent->attr.name, usess->id); | |
48842b30 | 1810 | |
edb67388 DG |
1811 | /* |
1812 | * NOTE: At this point, this function is called only if the session and | |
1813 | * channel passed are already created for all apps. and enabled on the | |
1814 | * tracer also. | |
1815 | */ | |
1816 | ||
48842b30 | 1817 | rcu_read_lock(); |
421cb601 DG |
1818 | |
1819 | /* For all registered applications */ | |
bec39940 | 1820 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
e0c7ec2b DG |
1821 | if (!app->compatible) { |
1822 | /* | |
1823 | * TODO: In time, we should notice the caller of this error by | |
1824 | * telling him that this is a version error. | |
1825 | */ | |
1826 | continue; | |
1827 | } | |
edb67388 DG |
1828 | ua_sess = lookup_session_by_app(usess, app); |
1829 | /* If ua_sess is NULL, there is a code flow error */ | |
1830 | assert(ua_sess); | |
ba767faf | 1831 | |
edb67388 | 1832 | /* Lookup channel in the ust app session */ |
bec39940 DG |
1833 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1834 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1835 | /* If the channel is not found, there is a code flow error */ |
1836 | assert(ua_chan_node); | |
1837 | ||
1838 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1839 | ||
bec39940 DG |
1840 | lttng_ht_lookup(ua_chan->events, (void*)uevent->attr.name, &uiter); |
1841 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
35a9059d | 1842 | if (ua_event_node == NULL) { |
7f79d3a1 DG |
1843 | DBG3("UST app enable event %s not found for app PID %d." |
1844 | "Skipping app", uevent->attr.name, app->key.pid); | |
35a9059d DG |
1845 | continue; |
1846 | } | |
1847 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1848 | ||
1849 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
1850 | if (ret < 0) { | |
7f79d3a1 | 1851 | goto error; |
48842b30 | 1852 | } |
edb67388 DG |
1853 | } |
1854 | ||
7f79d3a1 | 1855 | error: |
edb67388 | 1856 | rcu_read_unlock(); |
edb67388 DG |
1857 | return ret; |
1858 | } | |
1859 | ||
1860 | /* | |
1861 | * For a specific existing UST session and UST channel, creates the event for | |
1862 | * all registered apps. | |
1863 | */ | |
35a9059d | 1864 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
1865 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1866 | { | |
1867 | int ret = 0; | |
bec39940 DG |
1868 | struct lttng_ht_iter iter, uiter; |
1869 | struct lttng_ht_node_str *ua_chan_node; | |
edb67388 DG |
1870 | struct ust_app *app; |
1871 | struct ust_app_session *ua_sess; | |
1872 | struct ust_app_channel *ua_chan; | |
1873 | ||
a991f516 MD |
1874 | DBG("UST app creating event %s for all apps for session id %d", |
1875 | uevent->attr.name, usess->id); | |
edb67388 | 1876 | |
edb67388 DG |
1877 | rcu_read_lock(); |
1878 | ||
1879 | /* For all registered applications */ | |
bec39940 | 1880 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
e0c7ec2b DG |
1881 | if (!app->compatible) { |
1882 | /* | |
1883 | * TODO: In time, we should notice the caller of this error by | |
1884 | * telling him that this is a version error. | |
1885 | */ | |
1886 | continue; | |
1887 | } | |
edb67388 DG |
1888 | ua_sess = lookup_session_by_app(usess, app); |
1889 | /* If ua_sess is NULL, there is a code flow error */ | |
1890 | assert(ua_sess); | |
48842b30 DG |
1891 | |
1892 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1893 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1894 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1895 | /* If the channel is not found, there is a code flow error */ |
1896 | assert(ua_chan_node); | |
1897 | ||
48842b30 DG |
1898 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1899 | ||
edb67388 DG |
1900 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1901 | if (ret < 0) { | |
fc34caaa DG |
1902 | if (ret != -EEXIST) { |
1903 | /* Possible value at this point: -ENOMEM. If so, we stop! */ | |
1904 | break; | |
1905 | } | |
1906 | DBG2("UST app event %s already exist on app PID %d", | |
1907 | uevent->attr.name, app->key.pid); | |
5b4a0ec0 | 1908 | continue; |
48842b30 | 1909 | } |
48842b30 | 1910 | } |
5b4a0ec0 | 1911 | |
48842b30 DG |
1912 | rcu_read_unlock(); |
1913 | ||
1914 | return ret; | |
1915 | } | |
1916 | ||
5b4a0ec0 DG |
1917 | /* |
1918 | * Start tracing for a specific UST session and app. | |
1919 | */ | |
421cb601 | 1920 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1921 | { |
1922 | int ret = 0; | |
bec39940 | 1923 | struct lttng_ht_iter iter; |
48842b30 DG |
1924 | struct ust_app_session *ua_sess; |
1925 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 1926 | struct ltt_ust_stream *ustream; |
7753dea8 | 1927 | int consumerd_fd; |
48842b30 | 1928 | |
421cb601 | 1929 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 1930 | |
509cbaf8 MD |
1931 | rcu_read_lock(); |
1932 | ||
e0c7ec2b DG |
1933 | if (!app->compatible) { |
1934 | goto end; | |
1935 | } | |
1936 | ||
421cb601 DG |
1937 | ua_sess = lookup_session_by_app(usess, app); |
1938 | if (ua_sess == NULL) { | |
509cbaf8 | 1939 | goto error_rcu_unlock; |
421cb601 | 1940 | } |
48842b30 | 1941 | |
aea829b3 DG |
1942 | /* Upon restart, we skip the setup, already done */ |
1943 | if (ua_sess->started) { | |
8be98f9a | 1944 | goto skip_setup; |
aea829b3 | 1945 | } |
8be98f9a | 1946 | |
f848c3eb DG |
1947 | /* Indicate that the session has been started once */ |
1948 | ua_sess->started = 1; | |
1949 | ||
421cb601 DG |
1950 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1951 | if (ret < 0) { | |
509cbaf8 | 1952 | goto error_rcu_unlock; |
421cb601 | 1953 | } |
48842b30 | 1954 | |
421cb601 | 1955 | /* For each channel */ |
bec39940 DG |
1956 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
1957 | node.node) { | |
421cb601 DG |
1958 | /* Create all streams */ |
1959 | while (1) { | |
5b4a0ec0 | 1960 | /* Create UST stream */ |
421cb601 DG |
1961 | ustream = zmalloc(sizeof(*ustream)); |
1962 | if (ustream == NULL) { | |
1963 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1964 | goto error_rcu_unlock; |
421cb601 | 1965 | } |
48842b30 | 1966 | |
421cb601 DG |
1967 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
1968 | &ustream->obj); | |
48842b30 | 1969 | if (ret < 0) { |
421cb601 DG |
1970 | /* Got all streams */ |
1971 | break; | |
48842b30 | 1972 | } |
421cb601 | 1973 | ustream->handle = ustream->obj->handle; |
48842b30 | 1974 | |
421cb601 DG |
1975 | /* Order is important */ |
1976 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
477d7741 MD |
1977 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", |
1978 | ua_sess->path, ua_chan->name, | |
1979 | ua_chan->streams.count++); | |
aba8e916 DG |
1980 | if (ret < 0) { |
1981 | PERROR("asprintf UST create stream"); | |
421cb601 | 1982 | continue; |
aba8e916 | 1983 | } |
421cb601 DG |
1984 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1985 | ustream->pathname); | |
1986 | } | |
421cb601 | 1987 | } |
aba8e916 | 1988 | |
7753dea8 MD |
1989 | switch (app->bits_per_long) { |
1990 | case 64: | |
1991 | consumerd_fd = ust_consumerd64_fd; | |
1992 | break; | |
1993 | case 32: | |
1994 | consumerd_fd = ust_consumerd32_fd; | |
1995 | break; | |
1996 | default: | |
1997 | ret = -EINVAL; | |
1998 | goto error_rcu_unlock; | |
1999 | } | |
aea829b3 | 2000 | |
421cb601 | 2001 | /* Setup UST consumer socket and send fds to it */ |
7753dea8 | 2002 | ret = ust_consumer_send_session(consumerd_fd, ua_sess); |
421cb601 | 2003 | if (ret < 0) { |
509cbaf8 | 2004 | goto error_rcu_unlock; |
421cb601 | 2005 | } |
48842b30 | 2006 | |
8be98f9a | 2007 | skip_setup: |
421cb601 DG |
2008 | /* This start the UST tracing */ |
2009 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
2010 | if (ret < 0) { | |
2011 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 2012 | goto error_rcu_unlock; |
421cb601 | 2013 | } |
5b4a0ec0 | 2014 | |
421cb601 DG |
2015 | /* Quiescent wait after starting trace */ |
2016 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 2017 | |
e0c7ec2b DG |
2018 | end: |
2019 | rcu_read_unlock(); | |
421cb601 | 2020 | return 0; |
48842b30 | 2021 | |
509cbaf8 MD |
2022 | error_rcu_unlock: |
2023 | rcu_read_unlock(); | |
421cb601 DG |
2024 | return -1; |
2025 | } | |
48842b30 | 2026 | |
8be98f9a MD |
2027 | /* |
2028 | * Stop tracing for a specific UST session and app. | |
2029 | */ | |
2030 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2031 | { | |
2032 | int ret = 0; | |
bec39940 | 2033 | struct lttng_ht_iter iter; |
8be98f9a | 2034 | struct ust_app_session *ua_sess; |
6d3686da | 2035 | struct ust_app_channel *ua_chan; |
8be98f9a MD |
2036 | |
2037 | DBG("Stopping tracing for ust app pid %d", app->key.pid); | |
2038 | ||
2039 | rcu_read_lock(); | |
2040 | ||
e0c7ec2b DG |
2041 | if (!app->compatible) { |
2042 | goto end; | |
2043 | } | |
2044 | ||
8be98f9a MD |
2045 | ua_sess = lookup_session_by_app(usess, app); |
2046 | if (ua_sess == NULL) { | |
2047 | /* Only malloc can failed so something is really wrong */ | |
2048 | goto error_rcu_unlock; | |
2049 | } | |
2050 | ||
9bc07046 DG |
2051 | /* |
2052 | * If started = 0, it means that stop trace has been called for a session | |
2053 | * that was never started. This is a code flow error and should never | |
2054 | * happen. | |
2055 | */ | |
2056 | assert(ua_sess->started == 1); | |
7db205b5 | 2057 | |
9d6c7d3f DG |
2058 | /* This inhibits UST tracing */ |
2059 | ret = ustctl_stop_session(app->key.sock, ua_sess->handle); | |
2060 | if (ret < 0) { | |
2061 | ERR("Error stopping tracing for app pid: %d", app->key.pid); | |
2062 | goto error_rcu_unlock; | |
2063 | } | |
2064 | ||
2065 | /* Quiescent wait after stopping trace */ | |
2066 | ustctl_wait_quiescent(app->key.sock); | |
2067 | ||
2068 | /* Flushing buffers */ | |
bec39940 DG |
2069 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2070 | node.node) { | |
6d3686da | 2071 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_chan->obj); |
8be98f9a | 2072 | if (ret < 0) { |
7db205b5 DG |
2073 | ERR("UST app PID %d channel %s flush failed with ret %d", |
2074 | app->key.pid, ua_chan->name, ret); | |
6d3686da DG |
2075 | /* Continuing flushing all buffers */ |
2076 | continue; | |
8be98f9a MD |
2077 | } |
2078 | } | |
8be98f9a | 2079 | |
90d97d10 DG |
2080 | /* Flush all buffers before stopping */ |
2081 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_sess->metadata->obj); | |
2082 | if (ret < 0) { | |
7db205b5 DG |
2083 | ERR("UST app PID %d metadata flush failed with ret %d", app->key.pid, |
2084 | ret); | |
90d97d10 DG |
2085 | } |
2086 | ||
7db205b5 DG |
2087 | end: |
2088 | rcu_read_unlock(); | |
8be98f9a MD |
2089 | return 0; |
2090 | ||
2091 | error_rcu_unlock: | |
2092 | rcu_read_unlock(); | |
2093 | return -1; | |
2094 | } | |
2095 | ||
84cd17c6 MD |
2096 | /* |
2097 | * Destroy a specific UST session in apps. | |
2098 | */ | |
2099 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2100 | { | |
2101 | struct ust_app_session *ua_sess; | |
2102 | struct lttng_ust_object_data obj; | |
bec39940 DG |
2103 | struct lttng_ht_iter iter; |
2104 | struct lttng_ht_node_ulong *node; | |
525b0740 | 2105 | int ret; |
84cd17c6 MD |
2106 | |
2107 | DBG("Destroy tracing for ust app pid %d", app->key.pid); | |
2108 | ||
2109 | rcu_read_lock(); | |
2110 | ||
e0c7ec2b DG |
2111 | if (!app->compatible) { |
2112 | goto end; | |
2113 | } | |
2114 | ||
84cd17c6 | 2115 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 2116 | node = lttng_ht_iter_get_node_ulong(&iter); |
84cd17c6 MD |
2117 | if (node == NULL) { |
2118 | /* Only malloc can failed so something is really wrong */ | |
2119 | goto error_rcu_unlock; | |
2120 | } | |
2121 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
bec39940 | 2122 | ret = lttng_ht_del(app->sessions, &iter); |
525b0740 | 2123 | assert(!ret); |
84cd17c6 MD |
2124 | obj.handle = ua_sess->handle; |
2125 | obj.shm_fd = -1; | |
2126 | obj.wait_fd = -1; | |
2127 | obj.memory_map_size = 0; | |
2128 | ustctl_release_object(app->key.sock, &obj); | |
2129 | ||
7db205b5 DG |
2130 | delete_ust_app_session(app->key.sock, ua_sess); |
2131 | ||
84cd17c6 MD |
2132 | /* Quiescent wait after stopping trace */ |
2133 | ustctl_wait_quiescent(app->key.sock); | |
2134 | ||
e0c7ec2b DG |
2135 | end: |
2136 | rcu_read_unlock(); | |
84cd17c6 MD |
2137 | return 0; |
2138 | ||
2139 | error_rcu_unlock: | |
2140 | rcu_read_unlock(); | |
2141 | return -1; | |
2142 | } | |
2143 | ||
5b4a0ec0 DG |
2144 | /* |
2145 | * Start tracing for the UST session. | |
2146 | */ | |
421cb601 DG |
2147 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
2148 | { | |
2149 | int ret = 0; | |
bec39940 | 2150 | struct lttng_ht_iter iter; |
421cb601 | 2151 | struct ust_app *app; |
48842b30 | 2152 | |
421cb601 DG |
2153 | DBG("Starting all UST traces"); |
2154 | ||
2155 | rcu_read_lock(); | |
421cb601 | 2156 | |
bec39940 | 2157 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
421cb601 | 2158 | ret = ust_app_start_trace(usess, app); |
48842b30 | 2159 | if (ret < 0) { |
5b4a0ec0 DG |
2160 | /* Continue to next apps even on error */ |
2161 | continue; | |
48842b30 | 2162 | } |
48842b30 | 2163 | } |
5b4a0ec0 | 2164 | |
48842b30 DG |
2165 | rcu_read_unlock(); |
2166 | ||
2167 | return 0; | |
2168 | } | |
487cf67c | 2169 | |
8be98f9a MD |
2170 | /* |
2171 | * Start tracing for the UST session. | |
2172 | */ | |
2173 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
2174 | { | |
2175 | int ret = 0; | |
bec39940 | 2176 | struct lttng_ht_iter iter; |
8be98f9a MD |
2177 | struct ust_app *app; |
2178 | ||
2179 | DBG("Stopping all UST traces"); | |
2180 | ||
2181 | rcu_read_lock(); | |
2182 | ||
bec39940 | 2183 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
8be98f9a MD |
2184 | ret = ust_app_stop_trace(usess, app); |
2185 | if (ret < 0) { | |
2186 | /* Continue to next apps even on error */ | |
2187 | continue; | |
2188 | } | |
2189 | } | |
2190 | ||
2191 | rcu_read_unlock(); | |
2192 | ||
2193 | return 0; | |
2194 | } | |
2195 | ||
84cd17c6 MD |
2196 | /* |
2197 | * Destroy app UST session. | |
2198 | */ | |
2199 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
2200 | { | |
2201 | int ret = 0; | |
bec39940 | 2202 | struct lttng_ht_iter iter; |
84cd17c6 MD |
2203 | struct ust_app *app; |
2204 | ||
2205 | DBG("Destroy all UST traces"); | |
2206 | ||
2207 | rcu_read_lock(); | |
2208 | ||
bec39940 | 2209 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
84cd17c6 MD |
2210 | ret = ust_app_destroy_trace(usess, app); |
2211 | if (ret < 0) { | |
2212 | /* Continue to next apps even on error */ | |
2213 | continue; | |
2214 | } | |
2215 | } | |
2216 | ||
2217 | rcu_read_unlock(); | |
2218 | ||
2219 | return 0; | |
2220 | } | |
2221 | ||
5b4a0ec0 DG |
2222 | /* |
2223 | * Add channels/events from UST global domain to registered apps at sock. | |
2224 | */ | |
487cf67c DG |
2225 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
2226 | { | |
55c54cce | 2227 | int ret = 0; |
727d5404 | 2228 | struct lttng_ht_iter iter, uiter, iter_ctx; |
487cf67c DG |
2229 | struct ust_app *app; |
2230 | struct ust_app_session *ua_sess; | |
2231 | struct ust_app_channel *ua_chan; | |
2232 | struct ust_app_event *ua_event; | |
727d5404 | 2233 | struct ust_app_ctx *ua_ctx; |
1f3580c7 DG |
2234 | |
2235 | if (usess == NULL) { | |
5b4a0ec0 | 2236 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
2237 | goto error; |
2238 | } | |
2239 | ||
a991f516 MD |
2240 | DBG2("UST app global update for app sock %d for session id %d", sock, |
2241 | usess->id); | |
487cf67c | 2242 | |
284d8f55 DG |
2243 | rcu_read_lock(); |
2244 | ||
487cf67c DG |
2245 | app = find_app_by_sock(sock); |
2246 | if (app == NULL) { | |
2247 | ERR("Failed to update app sock %d", sock); | |
2248 | goto error; | |
2249 | } | |
2250 | ||
e0c7ec2b DG |
2251 | if (!app->compatible) { |
2252 | goto error; | |
2253 | } | |
2254 | ||
421cb601 | 2255 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 2256 | if (ua_sess == NULL) { |
487cf67c DG |
2257 | goto error; |
2258 | } | |
2259 | ||
284d8f55 DG |
2260 | /* |
2261 | * We can iterate safely here over all UST app session sicne the create ust | |
2262 | * app session above made a shadow copy of the UST global domain from the | |
2263 | * ltt ust session. | |
2264 | */ | |
bec39940 DG |
2265 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2266 | node.node) { | |
284d8f55 DG |
2267 | ret = create_ust_channel(app, ua_sess, ua_chan); |
2268 | if (ret < 0) { | |
2269 | /* FIXME: Should we quit here or continue... */ | |
2270 | continue; | |
487cf67c DG |
2271 | } |
2272 | ||
727d5404 DG |
2273 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter_ctx.iter, ua_ctx, |
2274 | node.node) { | |
2275 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
2276 | if (ret < 0) { | |
2277 | /* FIXME: Should we quit here or continue... */ | |
2278 | continue; | |
2279 | } | |
2280 | } | |
2281 | ||
2282 | ||
284d8f55 | 2283 | /* For each events */ |
bec39940 DG |
2284 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
2285 | node.node) { | |
284d8f55 DG |
2286 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
2287 | if (ret < 0) { | |
2288 | /* FIXME: Should we quit here or continue... */ | |
2289 | continue; | |
487cf67c | 2290 | } |
727d5404 DG |
2291 | |
2292 | /* Add context on events. */ | |
2293 | cds_lfht_for_each_entry(ua_event->ctx->ht, &iter_ctx.iter, | |
2294 | ua_ctx, node.node) { | |
2295 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
2296 | if (ret < 0) { | |
2297 | /* FIXME: Should we quit here or continue... */ | |
2298 | continue; | |
2299 | } | |
2300 | } | |
36dc12cc | 2301 | } |
487cf67c DG |
2302 | } |
2303 | ||
36dc12cc | 2304 | if (usess->start_trace) { |
421cb601 | 2305 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 2306 | if (ret < 0) { |
36dc12cc DG |
2307 | goto error; |
2308 | } | |
2309 | ||
36dc12cc DG |
2310 | DBG2("UST trace started for app pid %d", app->key.pid); |
2311 | } | |
2312 | ||
487cf67c DG |
2313 | error: |
2314 | rcu_read_unlock(); | |
2315 | return; | |
2316 | } | |
55cc08a6 DG |
2317 | |
2318 | /* | |
2319 | * Add context to a specific channel for global UST domain. | |
2320 | */ | |
2321 | int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess, | |
2322 | struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx) | |
2323 | { | |
2324 | int ret = 0; | |
bec39940 DG |
2325 | struct lttng_ht_node_str *ua_chan_node; |
2326 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2327 | struct ust_app_channel *ua_chan = NULL; |
2328 | struct ust_app_session *ua_sess; | |
2329 | struct ust_app *app; | |
2330 | ||
2331 | rcu_read_lock(); | |
2332 | ||
bec39940 | 2333 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
e0c7ec2b DG |
2334 | if (!app->compatible) { |
2335 | /* | |
2336 | * TODO: In time, we should notice the caller of this error by | |
2337 | * telling him that this is a version error. | |
2338 | */ | |
2339 | continue; | |
2340 | } | |
55cc08a6 DG |
2341 | ua_sess = lookup_session_by_app(usess, app); |
2342 | if (ua_sess == NULL) { | |
2343 | continue; | |
2344 | } | |
2345 | ||
2346 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2347 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2348 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2349 | if (ua_chan_node == NULL) { |
2350 | continue; | |
2351 | } | |
2352 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2353 | node); | |
2354 | ||
2355 | ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app); | |
2356 | if (ret < 0) { | |
2357 | continue; | |
2358 | } | |
2359 | } | |
2360 | ||
55cc08a6 DG |
2361 | rcu_read_unlock(); |
2362 | return ret; | |
2363 | } | |
2364 | ||
2365 | /* | |
2366 | * Add context to a specific event in a channel for global UST domain. | |
2367 | */ | |
2368 | int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess, | |
2369 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
2370 | struct ltt_ust_context *uctx) | |
2371 | { | |
2372 | int ret = 0; | |
bec39940 DG |
2373 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; |
2374 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2375 | struct ust_app_session *ua_sess; |
2376 | struct ust_app_event *ua_event; | |
2377 | struct ust_app_channel *ua_chan = NULL; | |
2378 | struct ust_app *app; | |
2379 | ||
2380 | rcu_read_lock(); | |
2381 | ||
bec39940 | 2382 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
e0c7ec2b DG |
2383 | if (!app->compatible) { |
2384 | /* | |
2385 | * TODO: In time, we should notice the caller of this error by | |
2386 | * telling him that this is a version error. | |
2387 | */ | |
2388 | continue; | |
2389 | } | |
55cc08a6 DG |
2390 | ua_sess = lookup_session_by_app(usess, app); |
2391 | if (ua_sess == NULL) { | |
2392 | continue; | |
2393 | } | |
2394 | ||
2395 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2396 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2397 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2398 | if (ua_chan_node == NULL) { |
2399 | continue; | |
2400 | } | |
2401 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2402 | node); | |
2403 | ||
bec39940 DG |
2404 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
2405 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2406 | if (ua_event_node == NULL) { |
2407 | continue; | |
2408 | } | |
2409 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, | |
2410 | node); | |
2411 | ||
2412 | ret = create_ust_app_event_context(ua_sess, ua_event, &uctx->ctx, app); | |
2413 | if (ret < 0) { | |
2414 | continue; | |
2415 | } | |
2416 | } | |
2417 | ||
55cc08a6 DG |
2418 | rcu_read_unlock(); |
2419 | return ret; | |
2420 | } | |
76d45b40 DG |
2421 | |
2422 | /* | |
2423 | * Enable event for a channel from a UST session for a specific PID. | |
2424 | */ | |
2425 | int ust_app_enable_event_pid(struct ltt_ust_session *usess, | |
2426 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2427 | { | |
2428 | int ret = 0; | |
bec39940 DG |
2429 | struct lttng_ht_iter iter; |
2430 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
76d45b40 DG |
2431 | struct ust_app *app; |
2432 | struct ust_app_session *ua_sess; | |
2433 | struct ust_app_channel *ua_chan; | |
2434 | struct ust_app_event *ua_event; | |
2435 | ||
2436 | DBG("UST app enabling event %s for PID %d", uevent->attr.name, pid); | |
2437 | ||
2438 | rcu_read_lock(); | |
2439 | ||
2440 | app = ust_app_find_by_pid(pid); | |
2441 | if (app == NULL) { | |
2442 | ERR("UST app enable event per PID %d not found", pid); | |
2443 | ret = -1; | |
2444 | goto error; | |
2445 | } | |
2446 | ||
e0c7ec2b DG |
2447 | if (!app->compatible) { |
2448 | ret = 0; | |
2449 | goto error; | |
2450 | } | |
2451 | ||
76d45b40 DG |
2452 | ua_sess = lookup_session_by_app(usess, app); |
2453 | /* If ua_sess is NULL, there is a code flow error */ | |
2454 | assert(ua_sess); | |
2455 | ||
2456 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2457 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2458 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2459 | /* If the channel is not found, there is a code flow error */ |
2460 | assert(ua_chan_node); | |
2461 | ||
2462 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2463 | ||
bec39940 DG |
2464 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2465 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2466 | if (ua_event_node == NULL) { |
2467 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); | |
2468 | if (ret < 0) { | |
2469 | goto error; | |
2470 | } | |
2471 | } else { | |
2472 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2473 | ||
2474 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2475 | if (ret < 0) { | |
2476 | goto error; | |
2477 | } | |
2478 | } | |
2479 | ||
2480 | error: | |
2481 | rcu_read_unlock(); | |
2482 | return ret; | |
2483 | } | |
7f79d3a1 DG |
2484 | |
2485 | /* | |
2486 | * Disable event for a channel from a UST session for a specific PID. | |
2487 | */ | |
2488 | int ust_app_disable_event_pid(struct ltt_ust_session *usess, | |
2489 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2490 | { | |
2491 | int ret = 0; | |
bec39940 DG |
2492 | struct lttng_ht_iter iter; |
2493 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
7f79d3a1 DG |
2494 | struct ust_app *app; |
2495 | struct ust_app_session *ua_sess; | |
2496 | struct ust_app_channel *ua_chan; | |
2497 | struct ust_app_event *ua_event; | |
2498 | ||
2499 | DBG("UST app disabling event %s for PID %d", uevent->attr.name, pid); | |
2500 | ||
2501 | rcu_read_lock(); | |
2502 | ||
2503 | app = ust_app_find_by_pid(pid); | |
2504 | if (app == NULL) { | |
2505 | ERR("UST app disable event per PID %d not found", pid); | |
2506 | ret = -1; | |
2507 | goto error; | |
2508 | } | |
2509 | ||
e0c7ec2b DG |
2510 | if (!app->compatible) { |
2511 | ret = 0; | |
2512 | goto error; | |
2513 | } | |
2514 | ||
7f79d3a1 DG |
2515 | ua_sess = lookup_session_by_app(usess, app); |
2516 | /* If ua_sess is NULL, there is a code flow error */ | |
2517 | assert(ua_sess); | |
2518 | ||
2519 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2520 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2521 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2522 | if (ua_chan_node == NULL) { |
2523 | /* Channel does not exist, skip disabling */ | |
2524 | goto error; | |
2525 | } | |
2526 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2527 | ||
bec39940 DG |
2528 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2529 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2530 | if (ua_event_node == NULL) { |
2531 | /* Event does not exist, skip disabling */ | |
2532 | goto error; | |
2533 | } | |
2534 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2535 | ||
2536 | ret = disable_ust_app_event(ua_sess, ua_event, app); | |
2537 | if (ret < 0) { | |
2538 | goto error; | |
2539 | } | |
2540 | ||
2541 | error: | |
2542 | rcu_read_unlock(); | |
2543 | return ret; | |
2544 | } | |
e0c7ec2b DG |
2545 | |
2546 | /* | |
2547 | * Validate version of UST apps and set the compatible bit. | |
2548 | */ | |
2549 | int ust_app_validate_version(int sock) | |
2550 | { | |
2551 | int ret; | |
2552 | struct ust_app *app; | |
2553 | ||
2554 | rcu_read_lock(); | |
2555 | ||
2556 | app = find_app_by_sock(sock); | |
2557 | assert(app); | |
2558 | ||
2559 | ret = ustctl_tracer_version(sock, &app->version); | |
2560 | if (ret < 0) { | |
2561 | goto error; | |
2562 | } | |
2563 | ||
2564 | /* Validate version */ | |
2565 | if (app->version.major > UST_APP_MAJOR_VERSION) { | |
2566 | goto error; | |
2567 | } | |
2568 | ||
2569 | DBG2("UST app PID %d is compatible with major version %d " | |
2570 | "(supporting <= %d)", app->key.pid, app->version.major, | |
2571 | UST_APP_MAJOR_VERSION); | |
2572 | app->compatible = 1; | |
2573 | rcu_read_unlock(); | |
2574 | return 0; | |
2575 | ||
2576 | error: | |
2577 | DBG2("UST app PID %d is not compatible with major version %d " | |
2578 | "(supporting <= %d)", app->key.pid, app->version.major, | |
2579 | UST_APP_MAJOR_VERSION); | |
2580 | app->compatible = 0; | |
2581 | rcu_read_unlock(); | |
2582 | return -1; | |
2583 | } | |
4466912f DG |
2584 | |
2585 | /* | |
2586 | * Calibrate registered applications. | |
2587 | */ | |
2588 | int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate) | |
2589 | { | |
2590 | int ret = 0; | |
2591 | struct lttng_ht_iter iter; | |
2592 | struct ust_app *app; | |
2593 | ||
2594 | rcu_read_lock(); | |
2595 | ||
2596 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { | |
2597 | if (!app->compatible) { | |
2598 | /* | |
2599 | * TODO: In time, we should notice the caller of this error by | |
2600 | * telling him that this is a version error. | |
2601 | */ | |
2602 | continue; | |
2603 | } | |
2604 | ||
2605 | ret = ustctl_calibrate(app->key.sock, calibrate); | |
2606 | if (ret < 0) { | |
2607 | switch (ret) { | |
2608 | case -ENOSYS: | |
2609 | /* Means that it's not implemented on the tracer side. */ | |
2610 | ret = 0; | |
2611 | break; | |
2612 | default: | |
2613 | /* TODO: Report error to user */ | |
2614 | DBG2("Calibrate app PID %d returned with error %d", | |
2615 | app->key.pid, ret); | |
2616 | break; | |
2617 | } | |
2618 | } | |
2619 | } | |
2620 | ||
2621 | DBG("UST app global domain calibration finished"); | |
2622 | ||
2623 | rcu_read_unlock(); | |
2624 | ||
2625 | return ret; | |
2626 | } |