Commit | Line | Data |
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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 */ |
852d0037 DG |
183 | sock = app->sock; |
184 | app->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); |
852d0037 | 191 | delete_ust_app_session(app->sock, ua_sess); |
d80a6244 | 192 | } |
bec39940 | 193 | lttng_ht_destroy(app->sessions); |
d80a6244 | 194 | |
6414a713 | 195 | /* |
852d0037 DG |
196 | * Wait until we have deleted the application from the sock hash table |
197 | * before closing this socket, otherwise an application could re-use the | |
198 | * socket ID and race with the teardown, using the same hash table entry. | |
199 | * | |
200 | * It's OK to leave the close in call_rcu. We want it to stay unique for | |
201 | * all RCU readers that could run concurrently with unregister app, | |
202 | * therefore we _need_ to only close that socket after a grace period. So | |
203 | * it should stay in this RCU callback. | |
204 | * | |
205 | * This close() is a very important step of the synchronization model so | |
206 | * every modification to this function must be carefully reviewed. | |
6414a713 | 207 | */ |
799e2c4f MD |
208 | ret = close(sock); |
209 | if (ret) { | |
210 | PERROR("close"); | |
211 | } | |
d80a6244 | 212 | |
852d0037 | 213 | DBG2("UST app pid %d deleted", app->pid); |
284d8f55 | 214 | free(app); |
bec39940 | 215 | |
f6a9efaa | 216 | rcu_read_unlock(); |
099e26bd DG |
217 | } |
218 | ||
219 | /* | |
f6a9efaa | 220 | * URCU intermediate call to delete an UST app. |
099e26bd | 221 | */ |
8b366481 DG |
222 | static |
223 | void delete_ust_app_rcu(struct rcu_head *head) | |
099e26bd | 224 | { |
bec39940 DG |
225 | struct lttng_ht_node_ulong *node = |
226 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa | 227 | struct ust_app *app = |
852d0037 | 228 | caa_container_of(node, struct ust_app, pid_n); |
f6a9efaa | 229 | |
852d0037 | 230 | DBG3("Call RCU deleting app PID %d", app->pid); |
f6a9efaa | 231 | delete_ust_app(app); |
099e26bd DG |
232 | } |
233 | ||
8b366481 DG |
234 | /* |
235 | * Alloc new UST app session. | |
236 | */ | |
237 | static | |
238 | struct ust_app_session *alloc_ust_app_session(void) | |
239 | { | |
240 | struct ust_app_session *ua_sess; | |
241 | ||
242 | /* Init most of the default value by allocating and zeroing */ | |
243 | ua_sess = zmalloc(sizeof(struct ust_app_session)); | |
244 | if (ua_sess == NULL) { | |
245 | PERROR("malloc"); | |
246 | goto error; | |
247 | } | |
248 | ||
249 | ua_sess->handle = -1; | |
bec39940 | 250 | ua_sess->channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
8b366481 DG |
251 | |
252 | return ua_sess; | |
253 | ||
254 | error: | |
255 | return NULL; | |
256 | } | |
257 | ||
258 | /* | |
259 | * Alloc new UST app channel. | |
260 | */ | |
261 | static | |
262 | struct ust_app_channel *alloc_ust_app_channel(char *name, | |
263 | struct lttng_ust_channel *attr) | |
264 | { | |
265 | struct ust_app_channel *ua_chan; | |
266 | ||
267 | /* Init most of the default value by allocating and zeroing */ | |
268 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); | |
269 | if (ua_chan == NULL) { | |
270 | PERROR("malloc"); | |
271 | goto error; | |
272 | } | |
273 | ||
274 | /* Setup channel name */ | |
275 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
276 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
277 | ||
278 | ua_chan->enabled = 1; | |
279 | ua_chan->handle = -1; | |
bec39940 DG |
280 | ua_chan->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
281 | ua_chan->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); | |
282 | lttng_ht_node_init_str(&ua_chan->node, ua_chan->name); | |
8b366481 DG |
283 | |
284 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); | |
285 | ||
286 | /* Copy attributes */ | |
287 | if (attr) { | |
288 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
289 | } | |
290 | ||
291 | DBG3("UST app channel %s allocated", ua_chan->name); | |
292 | ||
293 | return ua_chan; | |
294 | ||
295 | error: | |
296 | return NULL; | |
297 | } | |
298 | ||
299 | /* | |
300 | * Alloc new UST app event. | |
301 | */ | |
302 | static | |
303 | struct ust_app_event *alloc_ust_app_event(char *name, | |
304 | struct lttng_ust_event *attr) | |
305 | { | |
306 | struct ust_app_event *ua_event; | |
307 | ||
308 | /* Init most of the default value by allocating and zeroing */ | |
309 | ua_event = zmalloc(sizeof(struct ust_app_event)); | |
310 | if (ua_event == NULL) { | |
311 | PERROR("malloc"); | |
312 | goto error; | |
313 | } | |
314 | ||
315 | ua_event->enabled = 1; | |
316 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
317 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
bec39940 DG |
318 | ua_event->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
319 | lttng_ht_node_init_str(&ua_event->node, ua_event->name); | |
8b366481 DG |
320 | |
321 | /* Copy attributes */ | |
322 | if (attr) { | |
323 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
324 | } | |
325 | ||
326 | DBG3("UST app event %s allocated", ua_event->name); | |
327 | ||
328 | return ua_event; | |
329 | ||
330 | error: | |
331 | return NULL; | |
332 | } | |
333 | ||
334 | /* | |
335 | * Alloc new UST app context. | |
336 | */ | |
337 | static | |
338 | struct ust_app_ctx *alloc_ust_app_ctx(struct lttng_ust_context *uctx) | |
339 | { | |
340 | struct ust_app_ctx *ua_ctx; | |
341 | ||
342 | ua_ctx = zmalloc(sizeof(struct ust_app_ctx)); | |
343 | if (ua_ctx == NULL) { | |
344 | goto error; | |
345 | } | |
346 | ||
347 | if (uctx) { | |
348 | memcpy(&ua_ctx->ctx, uctx, sizeof(ua_ctx->ctx)); | |
349 | } | |
350 | ||
351 | DBG3("UST app context %d allocated", ua_ctx->ctx.ctx); | |
352 | ||
353 | error: | |
354 | return ua_ctx; | |
355 | } | |
356 | ||
099e26bd | 357 | /* |
421cb601 DG |
358 | * Find an ust_app using the sock and return it. RCU read side lock must be |
359 | * held before calling this helper function. | |
099e26bd | 360 | */ |
8b366481 DG |
361 | static |
362 | struct ust_app *find_app_by_sock(int sock) | |
099e26bd | 363 | { |
bec39940 | 364 | struct lttng_ht_node_ulong *node; |
bec39940 | 365 | struct lttng_ht_iter iter; |
f6a9efaa | 366 | |
852d0037 | 367 | lttng_ht_lookup(ust_app_ht_by_sock, (void *)((unsigned long) sock), &iter); |
bec39940 | 368 | node = lttng_ht_iter_get_node_ulong(&iter); |
f6a9efaa DG |
369 | if (node == NULL) { |
370 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
371 | goto error; |
372 | } | |
852d0037 DG |
373 | |
374 | return caa_container_of(node, struct ust_app, sock_n); | |
f6a9efaa DG |
375 | |
376 | error: | |
377 | return NULL; | |
099e26bd DG |
378 | } |
379 | ||
55cc08a6 DG |
380 | /* |
381 | * Create the channel context on the tracer. | |
382 | */ | |
383 | static | |
384 | int create_ust_channel_context(struct ust_app_channel *ua_chan, | |
385 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
386 | { | |
387 | int ret; | |
388 | ||
852d0037 | 389 | ret = ustctl_add_context(app->sock, &ua_ctx->ctx, |
55cc08a6 DG |
390 | ua_chan->obj, &ua_ctx->obj); |
391 | if (ret < 0) { | |
392 | goto error; | |
393 | } | |
394 | ||
395 | ua_ctx->handle = ua_ctx->obj->handle; | |
396 | ||
727d5404 | 397 | DBG2("UST app context created successfully for channel %s", ua_chan->name); |
55cc08a6 DG |
398 | |
399 | error: | |
400 | return ret; | |
401 | } | |
402 | ||
403 | /* | |
404 | * Create the event context on the tracer. | |
405 | */ | |
406 | static | |
407 | int create_ust_event_context(struct ust_app_event *ua_event, | |
408 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
409 | { | |
410 | int ret; | |
411 | ||
852d0037 | 412 | ret = ustctl_add_context(app->sock, &ua_ctx->ctx, |
55cc08a6 DG |
413 | ua_event->obj, &ua_ctx->obj); |
414 | if (ret < 0) { | |
415 | goto error; | |
416 | } | |
417 | ||
418 | ua_ctx->handle = ua_ctx->obj->handle; | |
419 | ||
727d5404 | 420 | DBG2("UST app context created successfully for event %s", ua_event->name); |
55cc08a6 DG |
421 | |
422 | error: | |
423 | return ret; | |
424 | } | |
425 | ||
9730260e DG |
426 | /* |
427 | * Disable the specified event on to UST tracer for the UST session. | |
428 | */ | |
429 | static int disable_ust_event(struct ust_app *app, | |
430 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
431 | { | |
432 | int ret; | |
433 | ||
852d0037 | 434 | ret = ustctl_disable(app->sock, ua_event->obj); |
9730260e DG |
435 | if (ret < 0) { |
436 | ERR("UST app event %s disable failed for app (pid: %d) " | |
437 | "and session handle %d with ret %d", | |
852d0037 | 438 | ua_event->attr.name, app->pid, ua_sess->handle, ret); |
9730260e DG |
439 | goto error; |
440 | } | |
441 | ||
442 | DBG2("UST app event %s disabled successfully for app (pid: %d)", | |
852d0037 | 443 | ua_event->attr.name, app->pid); |
9730260e DG |
444 | |
445 | error: | |
446 | return ret; | |
447 | } | |
448 | ||
78f0bacd DG |
449 | /* |
450 | * Disable the specified channel on to UST tracer for the UST session. | |
451 | */ | |
452 | static int disable_ust_channel(struct ust_app *app, | |
453 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
454 | { | |
455 | int ret; | |
456 | ||
852d0037 | 457 | ret = ustctl_disable(app->sock, ua_chan->obj); |
78f0bacd DG |
458 | if (ret < 0) { |
459 | ERR("UST app channel %s disable failed for app (pid: %d) " | |
460 | "and session handle %d with ret %d", | |
852d0037 | 461 | ua_chan->name, app->pid, ua_sess->handle, ret); |
78f0bacd DG |
462 | goto error; |
463 | } | |
464 | ||
78f0bacd | 465 | DBG2("UST app channel %s disabled successfully for app (pid: %d)", |
852d0037 | 466 | ua_chan->name, app->pid); |
78f0bacd DG |
467 | |
468 | error: | |
469 | return ret; | |
470 | } | |
471 | ||
472 | /* | |
473 | * Enable the specified channel on to UST tracer for the UST session. | |
474 | */ | |
475 | static int enable_ust_channel(struct ust_app *app, | |
476 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
477 | { | |
478 | int ret; | |
479 | ||
852d0037 | 480 | ret = ustctl_enable(app->sock, ua_chan->obj); |
78f0bacd DG |
481 | if (ret < 0) { |
482 | ERR("UST app channel %s enable failed for app (pid: %d) " | |
483 | "and session handle %d with ret %d", | |
852d0037 | 484 | ua_chan->name, app->pid, ua_sess->handle, ret); |
78f0bacd DG |
485 | goto error; |
486 | } | |
487 | ||
488 | ua_chan->enabled = 1; | |
489 | ||
490 | DBG2("UST app channel %s enabled successfully for app (pid: %d)", | |
852d0037 | 491 | ua_chan->name, app->pid); |
78f0bacd DG |
492 | |
493 | error: | |
494 | return ret; | |
495 | } | |
496 | ||
edb67388 DG |
497 | /* |
498 | * Enable the specified event on to UST tracer for the UST session. | |
499 | */ | |
500 | static int enable_ust_event(struct ust_app *app, | |
501 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
502 | { | |
503 | int ret; | |
504 | ||
852d0037 | 505 | ret = ustctl_enable(app->sock, ua_event->obj); |
edb67388 DG |
506 | if (ret < 0) { |
507 | ERR("UST app event %s enable failed for app (pid: %d) " | |
508 | "and session handle %d with ret %d", | |
852d0037 | 509 | ua_event->attr.name, app->pid, ua_sess->handle, ret); |
edb67388 DG |
510 | goto error; |
511 | } | |
512 | ||
513 | DBG2("UST app event %s enabled successfully for app (pid: %d)", | |
852d0037 | 514 | ua_event->attr.name, app->pid); |
edb67388 DG |
515 | |
516 | error: | |
517 | return ret; | |
518 | } | |
519 | ||
099e26bd | 520 | /* |
5b4a0ec0 | 521 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 522 | */ |
5b4a0ec0 DG |
523 | static int open_ust_metadata(struct ust_app *app, |
524 | struct ust_app_session *ua_sess) | |
0177d773 | 525 | { |
5b4a0ec0 DG |
526 | int ret; |
527 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 528 | |
5b4a0ec0 DG |
529 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
530 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
531 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
532 | uattr.switch_timer_interval = | |
533 | ua_sess->metadata->attr.switch_timer_interval; | |
534 | uattr.read_timer_interval = | |
535 | ua_sess->metadata->attr.read_timer_interval; | |
536 | uattr.output = ua_sess->metadata->attr.output; | |
537 | ||
538 | /* UST tracer metadata creation */ | |
852d0037 | 539 | ret = ustctl_open_metadata(app->sock, ua_sess->handle, &uattr, |
5b4a0ec0 DG |
540 | &ua_sess->metadata->obj); |
541 | if (ret < 0) { | |
fc34caaa | 542 | ERR("UST app open metadata failed for app pid:%d with ret %d", |
852d0037 | 543 | app->pid, ret); |
f6a9efaa | 544 | goto error; |
0177d773 | 545 | } |
f6a9efaa | 546 | |
6d3686da DG |
547 | ua_sess->metadata->handle = ua_sess->metadata->obj->handle; |
548 | ||
f6a9efaa | 549 | error: |
5b4a0ec0 | 550 | return ret; |
91d76f53 DG |
551 | } |
552 | ||
553 | /* | |
5b4a0ec0 | 554 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 555 | */ |
5b4a0ec0 DG |
556 | static int create_ust_stream(struct ust_app *app, |
557 | struct ust_app_session *ua_sess) | |
91d76f53 | 558 | { |
5b4a0ec0 | 559 | int ret; |
421cb601 | 560 | |
852d0037 | 561 | ret = ustctl_create_stream(app->sock, ua_sess->metadata->obj, |
5b4a0ec0 DG |
562 | &ua_sess->metadata->stream_obj); |
563 | if (ret < 0) { | |
564 | ERR("UST create metadata stream failed"); | |
421cb601 | 565 | goto error; |
91d76f53 | 566 | } |
421cb601 | 567 | |
421cb601 | 568 | error: |
5b4a0ec0 | 569 | return ret; |
91d76f53 DG |
570 | } |
571 | ||
b551a063 | 572 | /* |
5b4a0ec0 | 573 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 574 | */ |
5b4a0ec0 DG |
575 | static int create_ust_channel(struct ust_app *app, |
576 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 577 | { |
5b4a0ec0 | 578 | int ret; |
b551a063 | 579 | |
5b4a0ec0 | 580 | /* TODO: remove cast and use lttng-ust-abi.h */ |
852d0037 | 581 | ret = ustctl_create_channel(app->sock, ua_sess->handle, |
5b4a0ec0 DG |
582 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); |
583 | if (ret < 0) { | |
58f3ca76 | 584 | ERR("Creating channel %s for app (pid: %d, sock: %d) " |
5b4a0ec0 | 585 | "and session handle %d with ret %d", |
852d0037 | 586 | ua_chan->name, app->pid, app->sock, |
5b4a0ec0 | 587 | ua_sess->handle, ret); |
b551a063 DG |
588 | goto error; |
589 | } | |
590 | ||
5b4a0ec0 | 591 | ua_chan->handle = ua_chan->obj->handle; |
b551a063 | 592 | |
5b4a0ec0 | 593 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
852d0037 | 594 | ua_chan->name, app->pid, app->sock); |
b551a063 | 595 | |
8535a6d9 DG |
596 | /* If channel is not enabled, disable it on the tracer */ |
597 | if (!ua_chan->enabled) { | |
598 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
599 | if (ret < 0) { | |
600 | goto error; | |
601 | } | |
602 | } | |
603 | ||
b551a063 DG |
604 | error: |
605 | return ret; | |
606 | } | |
607 | ||
91d76f53 | 608 | /* |
5b4a0ec0 | 609 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 610 | */ |
edb67388 DG |
611 | static |
612 | int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess, | |
613 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event) | |
91d76f53 | 614 | { |
5b4a0ec0 | 615 | int ret = 0; |
284d8f55 | 616 | |
5b4a0ec0 | 617 | /* Create UST event on tracer */ |
852d0037 | 618 | ret = ustctl_create_event(app->sock, &ua_event->attr, ua_chan->obj, |
5b4a0ec0 DG |
619 | &ua_event->obj); |
620 | if (ret < 0) { | |
fc34caaa DG |
621 | if (ret == -EEXIST) { |
622 | ret = 0; | |
623 | goto error; | |
624 | } | |
5b4a0ec0 | 625 | ERR("Error ustctl create event %s for app pid: %d with ret %d", |
852d0037 | 626 | ua_event->attr.name, app->pid, ret); |
5b4a0ec0 | 627 | goto error; |
91d76f53 | 628 | } |
f6a9efaa | 629 | |
5b4a0ec0 | 630 | ua_event->handle = ua_event->obj->handle; |
284d8f55 | 631 | |
5b4a0ec0 | 632 | DBG2("UST app event %s created successfully for pid:%d", |
852d0037 | 633 | ua_event->attr.name, app->pid); |
f6a9efaa | 634 | |
8535a6d9 | 635 | /* If event not enabled, disable it on the tracer */ |
fc34caaa | 636 | if (ua_event->enabled == 0) { |
8535a6d9 DG |
637 | ret = disable_ust_event(app, ua_sess, ua_event); |
638 | if (ret < 0) { | |
fc34caaa DG |
639 | /* |
640 | * If we hit an EPERM, something is wrong with our disable call. If | |
641 | * we get an EEXIST, there is a problem on the tracer side since we | |
642 | * just created it. | |
643 | */ | |
644 | switch (ret) { | |
645 | case -EPERM: | |
646 | /* Code flow problem */ | |
647 | assert(0); | |
648 | case -EEXIST: | |
649 | /* It's OK for our use case. */ | |
650 | ret = 0; | |
651 | break; | |
652 | default: | |
653 | break; | |
654 | } | |
8535a6d9 DG |
655 | goto error; |
656 | } | |
657 | } | |
658 | ||
5b4a0ec0 DG |
659 | error: |
660 | return ret; | |
91d76f53 | 661 | } |
48842b30 | 662 | |
5b4a0ec0 DG |
663 | /* |
664 | * Copy data between an UST app event and a LTT event. | |
665 | */ | |
421cb601 | 666 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
667 | struct ltt_ust_event *uevent) |
668 | { | |
bec39940 | 669 | struct lttng_ht_iter iter; |
55cc08a6 DG |
670 | struct ltt_ust_context *uctx; |
671 | struct ust_app_ctx *ua_ctx; | |
672 | ||
48842b30 DG |
673 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); |
674 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
675 | ||
fc34caaa DG |
676 | ua_event->enabled = uevent->enabled; |
677 | ||
5b4a0ec0 DG |
678 | /* Copy event attributes */ |
679 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
680 | ||
bec39940 | 681 | cds_lfht_for_each_entry(uevent->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
682 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
683 | if (ua_ctx == NULL) { | |
fc34caaa DG |
684 | /* malloc() failed. We should simply stop */ |
685 | return; | |
55cc08a6 | 686 | } |
fc34caaa | 687 | |
bec39940 DG |
688 | lttng_ht_node_init_ulong(&ua_ctx->node, |
689 | (unsigned long) ua_ctx->ctx.ctx); | |
690 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 | 691 | } |
48842b30 DG |
692 | } |
693 | ||
5b4a0ec0 DG |
694 | /* |
695 | * Copy data between an UST app channel and a LTT channel. | |
696 | */ | |
421cb601 | 697 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
698 | struct ltt_ust_channel *uchan) |
699 | { | |
bec39940 DG |
700 | struct lttng_ht_iter iter; |
701 | struct lttng_ht_node_str *ua_event_node; | |
48842b30 | 702 | struct ltt_ust_event *uevent; |
55cc08a6 | 703 | struct ltt_ust_context *uctx; |
48842b30 | 704 | struct ust_app_event *ua_event; |
55cc08a6 | 705 | struct ust_app_ctx *ua_ctx; |
48842b30 | 706 | |
fc34caaa | 707 | DBG2("UST app shadow copy of channel %s started", ua_chan->name); |
48842b30 DG |
708 | |
709 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
710 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
711 | /* Copy event attributes */ |
712 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 | 713 | |
fc34caaa DG |
714 | ua_chan->enabled = uchan->enabled; |
715 | ||
bec39940 | 716 | cds_lfht_for_each_entry(uchan->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
717 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
718 | if (ua_ctx == NULL) { | |
719 | continue; | |
720 | } | |
bec39940 DG |
721 | lttng_ht_node_init_ulong(&ua_ctx->node, |
722 | (unsigned long) ua_ctx->ctx.ctx); | |
723 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 | 724 | } |
48842b30 | 725 | |
421cb601 | 726 | /* Copy all events from ltt ust channel to ust app channel */ |
bec39940 DG |
727 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
728 | struct lttng_ht_iter uiter; | |
ba767faf | 729 | |
bec39940 DG |
730 | lttng_ht_lookup(ua_chan->events, (void *) uevent->attr.name, &uiter); |
731 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
48842b30 | 732 | if (ua_event_node == NULL) { |
421cb601 | 733 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 734 | uevent->attr.name); |
284d8f55 | 735 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 736 | if (ua_event == NULL) { |
5b4a0ec0 | 737 | continue; |
48842b30 | 738 | } |
421cb601 | 739 | shadow_copy_event(ua_event, uevent); |
bec39940 | 740 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
48842b30 | 741 | } |
48842b30 DG |
742 | } |
743 | ||
fc34caaa | 744 | DBG3("UST app shadow copy of channel %s done", ua_chan->name); |
48842b30 DG |
745 | } |
746 | ||
5b4a0ec0 DG |
747 | /* |
748 | * Copy data between a UST app session and a regular LTT session. | |
749 | */ | |
421cb601 | 750 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
bec39940 | 751 | struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 | 752 | { |
bec39940 DG |
753 | struct lttng_ht_node_str *ua_chan_node; |
754 | struct lttng_ht_iter iter; | |
48842b30 DG |
755 | struct ltt_ust_channel *uchan; |
756 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
757 | time_t rawtime; |
758 | struct tm *timeinfo; | |
759 | char datetime[16]; | |
760 | int ret; | |
761 | ||
762 | /* Get date and time for unique app path */ | |
763 | time(&rawtime); | |
764 | timeinfo = localtime(&rawtime); | |
765 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 766 | |
421cb601 | 767 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 | 768 | |
a991f516 | 769 | ua_sess->id = usess->id; |
6df2e2c9 MD |
770 | ua_sess->uid = usess->uid; |
771 | ua_sess->gid = usess->gid; | |
48842b30 | 772 | |
fc34caaa | 773 | ret = snprintf(ua_sess->path, PATH_MAX, "%s/%s-%d-%s", usess->pathname, |
852d0037 | 774 | app->name, app->pid, datetime); |
477d7741 MD |
775 | if (ret < 0) { |
776 | PERROR("asprintf UST shadow copy session"); | |
777 | /* TODO: We cannot return an error from here.. */ | |
778 | assert(0); | |
779 | } | |
780 | ||
48842b30 DG |
781 | /* TODO: support all UST domain */ |
782 | ||
783 | /* Iterate over all channels in global domain. */ | |
bec39940 DG |
784 | cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter, |
785 | uchan, node.node) { | |
786 | struct lttng_ht_iter uiter; | |
ba767faf | 787 | |
bec39940 DG |
788 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
789 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
5b4a0ec0 | 790 | if (ua_chan_node != NULL) { |
fc34caaa | 791 | /* Session exist. Contiuing. */ |
5b4a0ec0 DG |
792 | continue; |
793 | } | |
421cb601 | 794 | |
5b4a0ec0 DG |
795 | DBG2("Channel %s not found on shadow session copy, creating it", |
796 | uchan->name); | |
797 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
798 | if (ua_chan == NULL) { | |
fc34caaa | 799 | /* malloc failed FIXME: Might want to do handle ENOMEM .. */ |
5b4a0ec0 | 800 | continue; |
48842b30 DG |
801 | } |
802 | ||
5b4a0ec0 | 803 | shadow_copy_channel(ua_chan, uchan); |
bec39940 | 804 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
48842b30 DG |
805 | } |
806 | } | |
807 | ||
78f0bacd DG |
808 | /* |
809 | * Lookup sesison wrapper. | |
810 | */ | |
84cd17c6 MD |
811 | static |
812 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
bec39940 | 813 | struct ust_app *app, struct lttng_ht_iter *iter) |
84cd17c6 MD |
814 | { |
815 | /* Get right UST app session from app */ | |
2c348c10 | 816 | lttng_ht_lookup(app->sessions, (void *)((unsigned long) usess->id), iter); |
84cd17c6 MD |
817 | } |
818 | ||
421cb601 DG |
819 | /* |
820 | * Return ust app session from the app session hashtable using the UST session | |
a991f516 | 821 | * id. |
421cb601 | 822 | */ |
48842b30 DG |
823 | static struct ust_app_session *lookup_session_by_app( |
824 | struct ltt_ust_session *usess, struct ust_app *app) | |
825 | { | |
bec39940 DG |
826 | struct lttng_ht_iter iter; |
827 | struct lttng_ht_node_ulong *node; | |
48842b30 | 828 | |
84cd17c6 | 829 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 830 | node = lttng_ht_iter_get_node_ulong(&iter); |
48842b30 DG |
831 | if (node == NULL) { |
832 | goto error; | |
833 | } | |
834 | ||
835 | return caa_container_of(node, struct ust_app_session, node); | |
836 | ||
837 | error: | |
838 | return NULL; | |
839 | } | |
840 | ||
421cb601 DG |
841 | /* |
842 | * Create a UST session onto the tracer of app and add it the session | |
843 | * hashtable. | |
844 | * | |
845 | * Return ust app session or NULL on error. | |
846 | */ | |
847 | static struct ust_app_session *create_ust_app_session( | |
848 | struct ltt_ust_session *usess, struct ust_app *app) | |
849 | { | |
850 | int ret; | |
851 | struct ust_app_session *ua_sess; | |
852 | ||
853 | ua_sess = lookup_session_by_app(usess, app); | |
854 | if (ua_sess == NULL) { | |
a991f516 | 855 | DBG2("UST app pid: %d session id %d not found, creating it", |
852d0037 | 856 | app->pid, usess->id); |
421cb601 DG |
857 | ua_sess = alloc_ust_app_session(); |
858 | if (ua_sess == NULL) { | |
859 | /* Only malloc can failed so something is really wrong */ | |
fc34caaa | 860 | goto end; |
421cb601 | 861 | } |
477d7741 | 862 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
863 | } |
864 | ||
865 | if (ua_sess->handle == -1) { | |
852d0037 | 866 | ret = ustctl_create_session(app->sock); |
421cb601 | 867 | if (ret < 0) { |
852d0037 | 868 | ERR("Creating session for app pid %d", app->pid); |
915d047c DG |
869 | /* This means that the tracer is gone... */ |
870 | ua_sess = (void*) -1UL; | |
421cb601 DG |
871 | goto error; |
872 | } | |
873 | ||
421cb601 DG |
874 | ua_sess->handle = ret; |
875 | ||
876 | /* Add ust app session to app's HT */ | |
2c348c10 | 877 | lttng_ht_node_init_ulong(&ua_sess->node, (unsigned long) ua_sess->id); |
bec39940 | 878 | lttng_ht_add_unique_ulong(app->sessions, &ua_sess->node); |
421cb601 DG |
879 | |
880 | DBG2("UST app session created successfully with handle %d", ret); | |
881 | } | |
882 | ||
fc34caaa | 883 | end: |
421cb601 DG |
884 | return ua_sess; |
885 | ||
886 | error: | |
fc34caaa | 887 | delete_ust_app_session(-1, ua_sess); |
421cb601 DG |
888 | return NULL; |
889 | } | |
890 | ||
55cc08a6 DG |
891 | /* |
892 | * Create a context for the channel on the tracer. | |
893 | */ | |
894 | static | |
895 | int create_ust_app_channel_context(struct ust_app_session *ua_sess, | |
896 | struct ust_app_channel *ua_chan, struct lttng_ust_context *uctx, | |
897 | struct ust_app *app) | |
898 | { | |
899 | int ret = 0; | |
bec39940 DG |
900 | struct lttng_ht_iter iter; |
901 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
902 | struct ust_app_ctx *ua_ctx; |
903 | ||
904 | DBG2("UST app adding context to channel %s", ua_chan->name); | |
905 | ||
bec39940 DG |
906 | lttng_ht_lookup(ua_chan->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
907 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
908 | if (node != NULL) { |
909 | ret = -EEXIST; | |
910 | goto error; | |
911 | } | |
912 | ||
913 | ua_ctx = alloc_ust_app_ctx(uctx); | |
914 | if (ua_ctx == NULL) { | |
915 | /* malloc failed */ | |
916 | ret = -1; | |
917 | goto error; | |
918 | } | |
919 | ||
bec39940 DG |
920 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
921 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 DG |
922 | |
923 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
924 | if (ret < 0) { | |
925 | goto error; | |
926 | } | |
927 | ||
928 | error: | |
929 | return ret; | |
930 | } | |
931 | ||
932 | /* | |
933 | * Create an UST context and enable it for the event on the tracer. | |
934 | */ | |
935 | static | |
936 | int create_ust_app_event_context(struct ust_app_session *ua_sess, | |
937 | struct ust_app_event *ua_event, struct lttng_ust_context *uctx, | |
938 | struct ust_app *app) | |
939 | { | |
940 | int ret = 0; | |
bec39940 DG |
941 | struct lttng_ht_iter iter; |
942 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
943 | struct ust_app_ctx *ua_ctx; |
944 | ||
945 | DBG2("UST app adding context to event %s", ua_event->name); | |
946 | ||
bec39940 DG |
947 | lttng_ht_lookup(ua_event->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
948 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
949 | if (node != NULL) { |
950 | ret = -EEXIST; | |
951 | goto error; | |
952 | } | |
953 | ||
954 | ua_ctx = alloc_ust_app_ctx(uctx); | |
955 | if (ua_ctx == NULL) { | |
956 | /* malloc failed */ | |
957 | ret = -1; | |
958 | goto error; | |
959 | } | |
960 | ||
bec39940 DG |
961 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
962 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 DG |
963 | |
964 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
965 | if (ret < 0) { | |
966 | goto error; | |
967 | } | |
968 | ||
969 | error: | |
970 | return ret; | |
971 | } | |
972 | ||
edb67388 DG |
973 | /* |
974 | * Enable on the tracer side a ust app event for the session and channel. | |
975 | */ | |
976 | static | |
977 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 978 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
979 | { |
980 | int ret; | |
981 | ||
982 | ret = enable_ust_event(app, ua_sess, ua_event); | |
983 | if (ret < 0) { | |
984 | goto error; | |
985 | } | |
986 | ||
987 | ua_event->enabled = 1; | |
988 | ||
989 | error: | |
990 | return ret; | |
991 | } | |
992 | ||
9730260e DG |
993 | /* |
994 | * Disable on the tracer side a ust app event for the session and channel. | |
995 | */ | |
996 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
7f79d3a1 | 997 | struct ust_app_event *ua_event, struct ust_app *app) |
9730260e DG |
998 | { |
999 | int ret; | |
1000 | ||
1001 | ret = disable_ust_event(app, ua_sess, ua_event); | |
1002 | if (ret < 0) { | |
1003 | goto error; | |
1004 | } | |
1005 | ||
1006 | ua_event->enabled = 0; | |
1007 | ||
1008 | error: | |
1009 | return ret; | |
1010 | } | |
1011 | ||
78f0bacd DG |
1012 | /* |
1013 | * Lookup ust app channel for session and disable it on the tracer side. | |
1014 | */ | |
8535a6d9 DG |
1015 | static |
1016 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
1017 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 1018 | { |
8535a6d9 | 1019 | int ret; |
78f0bacd DG |
1020 | |
1021 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
1022 | if (ret < 0) { | |
1023 | goto error; | |
1024 | } | |
1025 | ||
8535a6d9 DG |
1026 | ua_chan->enabled = 0; |
1027 | ||
78f0bacd DG |
1028 | error: |
1029 | return ret; | |
1030 | } | |
1031 | ||
1032 | /* | |
1033 | * Lookup ust app channel for session and enable it on the tracer side. | |
1034 | */ | |
1035 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
1036 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
1037 | { | |
1038 | int ret = 0; | |
bec39940 DG |
1039 | struct lttng_ht_iter iter; |
1040 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1041 | struct ust_app_channel *ua_chan; |
1042 | ||
bec39940 DG |
1043 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1044 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
78f0bacd | 1045 | if (ua_chan_node == NULL) { |
a991f516 MD |
1046 | DBG2("Unable to find channel %s in ust session id %u", |
1047 | uchan->name, ua_sess->id); | |
78f0bacd DG |
1048 | goto error; |
1049 | } | |
1050 | ||
1051 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1052 | ||
1053 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
1054 | if (ret < 0) { | |
1055 | goto error; | |
1056 | } | |
1057 | ||
1058 | error: | |
1059 | return ret; | |
1060 | } | |
1061 | ||
284d8f55 | 1062 | /* |
5b4a0ec0 | 1063 | * Create UST app channel and create it on the tracer. |
284d8f55 | 1064 | */ |
5b4a0ec0 DG |
1065 | static struct ust_app_channel *create_ust_app_channel( |
1066 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
1067 | struct ust_app *app) | |
1068 | { | |
1069 | int ret = 0; | |
bec39940 DG |
1070 | struct lttng_ht_iter iter; |
1071 | struct lttng_ht_node_str *ua_chan_node; | |
5b4a0ec0 DG |
1072 | struct ust_app_channel *ua_chan; |
1073 | ||
1074 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1075 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1076 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
fc34caaa | 1077 | if (ua_chan_node != NULL) { |
5b4a0ec0 | 1078 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
fc34caaa | 1079 | goto end; |
5b4a0ec0 DG |
1080 | } |
1081 | ||
fc34caaa DG |
1082 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); |
1083 | if (ua_chan == NULL) { | |
1084 | /* Only malloc can fail here */ | |
1085 | goto error; | |
1086 | } | |
1087 | shadow_copy_channel(ua_chan, uchan); | |
1088 | ||
5b4a0ec0 DG |
1089 | ret = create_ust_channel(app, ua_sess, ua_chan); |
1090 | if (ret < 0) { | |
fc34caaa DG |
1091 | /* Not found previously means that it does not exist on the tracer */ |
1092 | assert(ret != -EEXIST); | |
5b4a0ec0 DG |
1093 | goto error; |
1094 | } | |
1095 | ||
58f3ca76 DG |
1096 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
1097 | ||
fc34caaa | 1098 | DBG2("UST app create channel %s for PID %d completed", ua_chan->name, |
852d0037 | 1099 | app->pid); |
fc34caaa DG |
1100 | |
1101 | end: | |
5b4a0ec0 DG |
1102 | return ua_chan; |
1103 | ||
1104 | error: | |
fc34caaa | 1105 | delete_ust_app_channel(-1, ua_chan); |
5b4a0ec0 DG |
1106 | return NULL; |
1107 | } | |
1108 | ||
1109 | /* | |
1110 | * Create UST app event and create it on the tracer side. | |
1111 | */ | |
edb67388 DG |
1112 | static |
1113 | int create_ust_app_event(struct ust_app_session *ua_sess, | |
1114 | struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent, | |
1115 | struct ust_app *app) | |
284d8f55 | 1116 | { |
edb67388 | 1117 | int ret = 0; |
bec39940 DG |
1118 | struct lttng_ht_iter iter; |
1119 | struct lttng_ht_node_str *ua_event_node; | |
5b4a0ec0 | 1120 | struct ust_app_event *ua_event; |
284d8f55 | 1121 | |
5b4a0ec0 | 1122 | /* Get event node */ |
bec39940 DG |
1123 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
1124 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
edb67388 | 1125 | if (ua_event_node != NULL) { |
fc34caaa | 1126 | ret = -EEXIST; |
edb67388 DG |
1127 | goto end; |
1128 | } | |
5b4a0ec0 | 1129 | |
edb67388 DG |
1130 | /* Does not exist so create one */ |
1131 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
1132 | if (ua_event == NULL) { | |
1133 | /* Only malloc can failed so something is really wrong */ | |
1134 | ret = -ENOMEM; | |
fc34caaa | 1135 | goto end; |
5b4a0ec0 | 1136 | } |
edb67388 | 1137 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 1138 | |
edb67388 | 1139 | /* Create it on the tracer side */ |
5b4a0ec0 | 1140 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 1141 | if (ret < 0) { |
fc34caaa DG |
1142 | /* Not found previously means that it does not exist on the tracer */ |
1143 | assert(ret != -EEXIST); | |
284d8f55 DG |
1144 | goto error; |
1145 | } | |
1146 | ||
bec39940 | 1147 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
284d8f55 | 1148 | |
fc34caaa | 1149 | DBG2("UST app create event %s for PID %d completed", ua_event->name, |
852d0037 | 1150 | app->pid); |
7f79d3a1 | 1151 | |
edb67388 | 1152 | end: |
fc34caaa DG |
1153 | return ret; |
1154 | ||
5b4a0ec0 | 1155 | error: |
fc34caaa DG |
1156 | /* Valid. Calling here is already in a read side lock */ |
1157 | delete_ust_app_event(-1, ua_event); | |
edb67388 | 1158 | return ret; |
5b4a0ec0 DG |
1159 | } |
1160 | ||
1161 | /* | |
1162 | * Create UST metadata and open it on the tracer side. | |
1163 | */ | |
1164 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
1165 | char *pathname, struct ust_app *app) | |
1166 | { | |
1167 | int ret = 0; | |
1168 | ||
1169 | if (ua_sess->metadata == NULL) { | |
1170 | /* Allocate UST metadata */ | |
1171 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
1172 | if (ua_sess->metadata == NULL) { | |
fc34caaa | 1173 | /* malloc() failed */ |
5b4a0ec0 DG |
1174 | goto error; |
1175 | } | |
1176 | ||
1177 | ret = open_ust_metadata(app, ua_sess); | |
1178 | if (ret < 0) { | |
7db205b5 DG |
1179 | DBG3("Opening metadata failed. Cleaning up memory"); |
1180 | ||
fc34caaa DG |
1181 | /* Cleanup failed metadata struct */ |
1182 | free(ua_sess->metadata); | |
7db205b5 DG |
1183 | /* |
1184 | * This is very important because delete_ust_app_session check if | |
1185 | * the pointer is null or not in order to delete the metadata. | |
1186 | */ | |
1187 | ua_sess->metadata = NULL; | |
5b4a0ec0 DG |
1188 | goto error; |
1189 | } | |
1190 | ||
852d0037 | 1191 | DBG2("UST metadata opened for app pid %d", app->pid); |
5b4a0ec0 DG |
1192 | } |
1193 | ||
1194 | /* Open UST metadata stream */ | |
1195 | if (ua_sess->metadata->stream_obj == NULL) { | |
1196 | ret = create_ust_stream(app, ua_sess); | |
1197 | if (ret < 0) { | |
1198 | goto error; | |
1199 | } | |
1200 | ||
e11d277b | 1201 | ret = run_as_mkdir(ua_sess->path, S_IRWXU | S_IRWXG, |
67f747d8 | 1202 | ua_sess->uid, ua_sess->gid); |
5b4a0ec0 DG |
1203 | if (ret < 0) { |
1204 | PERROR("mkdir UST metadata"); | |
1205 | goto error; | |
1206 | } | |
1207 | ||
477d7741 MD |
1208 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
1209 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
1210 | if (ret < 0) { |
1211 | PERROR("asprintf UST create stream"); | |
1212 | goto error; | |
1213 | } | |
1214 | ||
1215 | DBG2("UST metadata stream object created for app pid %d", | |
852d0037 | 1216 | app->pid); |
5b4a0ec0 DG |
1217 | } else { |
1218 | ERR("Attempting to create stream without metadata opened"); | |
1219 | goto error; | |
1220 | } | |
1221 | ||
1222 | return 0; | |
1223 | ||
1224 | error: | |
1225 | return -1; | |
1226 | } | |
1227 | ||
1228 | /* | |
1229 | * Return pointer to traceable apps list. | |
1230 | */ | |
bec39940 | 1231 | struct lttng_ht *ust_app_get_ht(void) |
5b4a0ec0 DG |
1232 | { |
1233 | return ust_app_ht; | |
1234 | } | |
1235 | ||
1236 | /* | |
1237 | * Return ust app pointer or NULL if not found. | |
1238 | */ | |
1239 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
1240 | { | |
bec39940 DG |
1241 | struct lttng_ht_node_ulong *node; |
1242 | struct lttng_ht_iter iter; | |
5b4a0ec0 DG |
1243 | |
1244 | rcu_read_lock(); | |
bec39940 DG |
1245 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) pid), &iter); |
1246 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1247 | if (node == NULL) { |
1248 | DBG2("UST app no found with pid %d", pid); | |
1249 | goto error; | |
1250 | } | |
1251 | rcu_read_unlock(); | |
1252 | ||
1253 | DBG2("Found UST app by pid %d", pid); | |
1254 | ||
852d0037 | 1255 | return caa_container_of(node, struct ust_app, pid_n); |
5b4a0ec0 DG |
1256 | |
1257 | error: | |
1258 | rcu_read_unlock(); | |
1259 | return NULL; | |
1260 | } | |
1261 | ||
1262 | /* | |
1263 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
1264 | * add it to the global traceable app list. | |
1265 | * | |
0df502fd MD |
1266 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
1267 | * bitness is not supported. | |
5b4a0ec0 DG |
1268 | */ |
1269 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
1270 | { | |
1271 | struct ust_app *lta; | |
799e2c4f | 1272 | int ret; |
5b4a0ec0 | 1273 | |
7753dea8 MD |
1274 | if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL) |
1275 | || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) { | |
f943b0fb | 1276 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1277 | "%d-bit long, but no consumerd for this long size is available.\n", |
1278 | msg->name, msg->pid, msg->bits_per_long); | |
799e2c4f MD |
1279 | ret = close(sock); |
1280 | if (ret) { | |
1281 | PERROR("close"); | |
1282 | } | |
0df502fd MD |
1283 | return -EINVAL; |
1284 | } | |
3f2c5fcc MD |
1285 | if (msg->major != LTTNG_UST_COMM_MAJOR) { |
1286 | ERR("Registration failed: application \"%s\" (pid: %d) has " | |
1287 | "communication protocol version %u.%u, but sessiond supports 2.x.\n", | |
1288 | msg->name, msg->pid, msg->major, msg->minor); | |
799e2c4f MD |
1289 | ret = close(sock); |
1290 | if (ret) { | |
1291 | PERROR("close"); | |
1292 | } | |
3f2c5fcc MD |
1293 | return -EINVAL; |
1294 | } | |
5b4a0ec0 DG |
1295 | lta = zmalloc(sizeof(struct ust_app)); |
1296 | if (lta == NULL) { | |
1297 | PERROR("malloc"); | |
1298 | return -ENOMEM; | |
1299 | } | |
1300 | ||
1301 | lta->ppid = msg->ppid; | |
1302 | lta->uid = msg->uid; | |
1303 | lta->gid = msg->gid; | |
e0c7ec2b | 1304 | lta->compatible = 0; /* Not compatible until proven */ |
7753dea8 | 1305 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1306 | lta->v_major = msg->major; |
1307 | lta->v_minor = msg->minor; | |
1308 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1309 | lta->name[16] = '\0'; | |
bec39940 | 1310 | lta->sessions = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
5b4a0ec0 | 1311 | |
852d0037 DG |
1312 | lta->pid = msg->pid; |
1313 | lttng_ht_node_init_ulong(<a->pid_n, (unsigned long)lta->pid); | |
1314 | lta->sock = sock; | |
1315 | lttng_ht_node_init_ulong(<a->sock_n, (unsigned long)lta->sock); | |
5b4a0ec0 DG |
1316 | |
1317 | rcu_read_lock(); | |
852d0037 DG |
1318 | |
1319 | /* | |
1320 | * On a re-registration, we want to kick out the previous registration of | |
1321 | * that pid | |
1322 | */ | |
1323 | lttng_ht_add_replace_ulong(ust_app_ht, <a->pid_n); | |
1324 | ||
1325 | /* | |
1326 | * The socket _should_ be unique until _we_ call close. So, a add_unique | |
1327 | * for the ust_app_ht_by_sock is used which asserts fail if the entry was | |
1328 | * already in the table. | |
1329 | */ | |
1330 | lttng_ht_add_unique_ulong(ust_app_ht_by_sock, <a->sock_n); | |
1331 | ||
5b4a0ec0 DG |
1332 | rcu_read_unlock(); |
1333 | ||
1334 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
852d0037 DG |
1335 | " (version %d.%d)", lta->pid, lta->ppid, lta->uid, lta->gid, |
1336 | lta->sock, lta->name, lta->v_major, lta->v_minor); | |
5b4a0ec0 DG |
1337 | |
1338 | return 0; | |
1339 | } | |
1340 | ||
1341 | /* | |
1342 | * Unregister app by removing it from the global traceable app list and freeing | |
1343 | * the data struct. | |
1344 | * | |
1345 | * The socket is already closed at this point so no close to sock. | |
1346 | */ | |
1347 | void ust_app_unregister(int sock) | |
1348 | { | |
1349 | struct ust_app *lta; | |
bec39940 DG |
1350 | struct lttng_ht_node_ulong *node; |
1351 | struct lttng_ht_iter iter; | |
525b0740 | 1352 | int ret; |
5b4a0ec0 DG |
1353 | |
1354 | rcu_read_lock(); | |
886459c6 | 1355 | |
5b4a0ec0 | 1356 | /* Get the node reference for a call_rcu */ |
852d0037 | 1357 | lttng_ht_lookup(ust_app_ht_by_sock, (void *)((unsigned long) sock), &iter); |
bec39940 | 1358 | node = lttng_ht_iter_get_node_ulong(&iter); |
5b4a0ec0 | 1359 | if (node == NULL) { |
852d0037 | 1360 | ERR("Unable to find app by sock %d", sock); |
5b4a0ec0 DG |
1361 | goto error; |
1362 | } | |
284d8f55 | 1363 | |
852d0037 DG |
1364 | lta = caa_container_of(node, struct ust_app, sock_n); |
1365 | ||
1366 | DBG("PID %d unregistering with sock %d", lta->pid, sock); | |
1367 | ||
886459c6 | 1368 | /* Remove application from PID hash table */ |
852d0037 DG |
1369 | ret = lttng_ht_del(ust_app_ht_by_sock, &iter); |
1370 | assert(!ret); | |
1371 | ||
1372 | /* Assign second node for deletion */ | |
1373 | iter.iter.node = <a->pid_n.node; | |
1374 | ||
bec39940 | 1375 | ret = lttng_ht_del(ust_app_ht, &iter); |
525b0740 | 1376 | assert(!ret); |
852d0037 DG |
1377 | |
1378 | /* Free memory */ | |
1379 | call_rcu(<a->pid_n.head, delete_ust_app_rcu); | |
1380 | ||
284d8f55 | 1381 | error: |
5b4a0ec0 DG |
1382 | rcu_read_unlock(); |
1383 | return; | |
284d8f55 DG |
1384 | } |
1385 | ||
1386 | /* | |
5b4a0ec0 | 1387 | * Return traceable_app_count |
284d8f55 | 1388 | */ |
5b4a0ec0 | 1389 | unsigned long ust_app_list_count(void) |
284d8f55 | 1390 | { |
5b4a0ec0 | 1391 | unsigned long count; |
284d8f55 | 1392 | |
5b4a0ec0 | 1393 | rcu_read_lock(); |
bec39940 | 1394 | count = lttng_ht_get_count(ust_app_ht); |
5b4a0ec0 | 1395 | rcu_read_unlock(); |
284d8f55 | 1396 | |
5b4a0ec0 | 1397 | return count; |
284d8f55 DG |
1398 | } |
1399 | ||
5b4a0ec0 DG |
1400 | /* |
1401 | * Fill events array with all events name of all registered apps. | |
1402 | */ | |
1403 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1404 | { |
5b4a0ec0 DG |
1405 | int ret, handle; |
1406 | size_t nbmem, count = 0; | |
bec39940 | 1407 | struct lttng_ht_iter iter; |
5b4a0ec0 DG |
1408 | struct ust_app *app; |
1409 | struct lttng_event *tmp; | |
421cb601 | 1410 | |
5b4a0ec0 DG |
1411 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1412 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1413 | if (tmp == NULL) { | |
1414 | PERROR("zmalloc ust app events"); | |
1415 | ret = -ENOMEM; | |
421cb601 DG |
1416 | goto error; |
1417 | } | |
1418 | ||
5b4a0ec0 | 1419 | rcu_read_lock(); |
421cb601 | 1420 | |
852d0037 | 1421 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
90eaa0d2 | 1422 | struct lttng_ust_tracepoint_iter uiter; |
ac3bd9c0 | 1423 | |
e0c7ec2b DG |
1424 | if (!app->compatible) { |
1425 | /* | |
1426 | * TODO: In time, we should notice the caller of this error by | |
1427 | * telling him that this is a version error. | |
1428 | */ | |
1429 | continue; | |
1430 | } | |
852d0037 | 1431 | handle = ustctl_tracepoint_list(app->sock); |
5b4a0ec0 DG |
1432 | if (handle < 0) { |
1433 | ERR("UST app list events getting handle failed for app pid %d", | |
852d0037 | 1434 | app->pid); |
5b4a0ec0 DG |
1435 | continue; |
1436 | } | |
421cb601 | 1437 | |
852d0037 | 1438 | while ((ret = ustctl_tracepoint_list_get(app->sock, handle, |
90eaa0d2 | 1439 | &uiter)) != -ENOENT) { |
815564d8 MD |
1440 | if (count >= nbmem) { |
1441 | DBG2("Reallocating event list from %zu to %zu entries", nbmem, | |
1442 | 2 * nbmem); | |
1443 | nbmem *= 2; | |
2f221590 | 1444 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event)); |
5b4a0ec0 DG |
1445 | if (tmp == NULL) { |
1446 | PERROR("realloc ust app events"); | |
1447 | ret = -ENOMEM; | |
1448 | goto rcu_error; | |
1449 | } | |
1450 | } | |
90eaa0d2 | 1451 | memcpy(tmp[count].name, uiter.name, LTTNG_UST_SYM_NAME_LEN); |
8005f29a | 1452 | tmp[count].loglevel = uiter.loglevel; |
69892bbb | 1453 | tmp[count].type = LTTNG_UST_TRACEPOINT; |
852d0037 | 1454 | tmp[count].pid = app->pid; |
5b4a0ec0 DG |
1455 | tmp[count].enabled = -1; |
1456 | count++; | |
421cb601 | 1457 | } |
421cb601 DG |
1458 | } |
1459 | ||
5b4a0ec0 DG |
1460 | ret = count; |
1461 | *events = tmp; | |
421cb601 | 1462 | |
5b4a0ec0 | 1463 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1464 | |
5b4a0ec0 DG |
1465 | rcu_error: |
1466 | rcu_read_unlock(); | |
421cb601 | 1467 | error: |
5b4a0ec0 | 1468 | return ret; |
421cb601 DG |
1469 | } |
1470 | ||
5b4a0ec0 DG |
1471 | /* |
1472 | * Free and clean all traceable apps of the global list. | |
1473 | */ | |
1474 | void ust_app_clean_list(void) | |
421cb601 | 1475 | { |
5b4a0ec0 | 1476 | int ret; |
bec39940 DG |
1477 | struct lttng_ht_iter iter; |
1478 | struct lttng_ht_node_ulong *node; | |
421cb601 | 1479 | |
5b4a0ec0 | 1480 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1481 | |
5b4a0ec0 | 1482 | rcu_read_lock(); |
421cb601 | 1483 | |
bec39940 DG |
1484 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, node, node) { |
1485 | ret = lttng_ht_del(ust_app_ht, &iter); | |
525b0740 | 1486 | assert(!ret); |
bec39940 | 1487 | call_rcu(&node->head, delete_ust_app_rcu); |
421cb601 DG |
1488 | } |
1489 | ||
852d0037 DG |
1490 | /* Cleanup socket hash table */ |
1491 | cds_lfht_for_each_entry(ust_app_ht_by_sock->ht, &iter.iter, node, node) { | |
1492 | ret = lttng_ht_del(ust_app_ht_by_sock, &iter); | |
bec39940 DG |
1493 | assert(!ret); |
1494 | } | |
852d0037 | 1495 | |
bec39940 | 1496 | /* Destroy is done only when the ht is empty */ |
852d0037 DG |
1497 | lttng_ht_destroy(ust_app_ht); |
1498 | lttng_ht_destroy(ust_app_ht_by_sock); | |
421cb601 | 1499 | |
5b4a0ec0 DG |
1500 | rcu_read_unlock(); |
1501 | } | |
1502 | ||
1503 | /* | |
1504 | * Init UST app hash table. | |
1505 | */ | |
1506 | void ust_app_ht_alloc(void) | |
1507 | { | |
bec39940 | 1508 | ust_app_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
852d0037 | 1509 | ust_app_ht_by_sock = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
421cb601 DG |
1510 | } |
1511 | ||
78f0bacd DG |
1512 | /* |
1513 | * For a specific UST session, disable the channel for all registered apps. | |
1514 | */ | |
35a9059d | 1515 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1516 | struct ltt_ust_channel *uchan) |
1517 | { | |
1518 | int ret = 0; | |
bec39940 DG |
1519 | struct lttng_ht_iter iter; |
1520 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1521 | struct ust_app *app; |
1522 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1523 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1524 | |
1525 | if (usess == NULL || uchan == NULL) { | |
1526 | ERR("Disabling UST global channel with NULL values"); | |
1527 | ret = -1; | |
1528 | goto error; | |
1529 | } | |
1530 | ||
a991f516 MD |
1531 | DBG2("UST app disabling channel %s from global domain for session id %d", |
1532 | uchan->name, usess->id); | |
78f0bacd DG |
1533 | |
1534 | rcu_read_lock(); | |
1535 | ||
1536 | /* For every registered applications */ | |
852d0037 | 1537 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
bec39940 | 1538 | struct lttng_ht_iter uiter; |
e0c7ec2b DG |
1539 | if (!app->compatible) { |
1540 | /* | |
1541 | * TODO: In time, we should notice the caller of this error by | |
1542 | * telling him that this is a version error. | |
1543 | */ | |
1544 | continue; | |
1545 | } | |
78f0bacd DG |
1546 | ua_sess = lookup_session_by_app(usess, app); |
1547 | if (ua_sess == NULL) { | |
1548 | continue; | |
1549 | } | |
1550 | ||
8535a6d9 | 1551 | /* Get channel */ |
bec39940 DG |
1552 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1553 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
8535a6d9 DG |
1554 | /* If the session if found for the app, the channel must be there */ |
1555 | assert(ua_chan_node); | |
1556 | ||
1557 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1558 | /* The channel must not be already disabled */ | |
1559 | assert(ua_chan->enabled == 1); | |
1560 | ||
1561 | /* Disable channel onto application */ | |
1562 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1563 | if (ret < 0) { |
1564 | /* XXX: We might want to report this error at some point... */ | |
1565 | continue; | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | rcu_read_unlock(); | |
1570 | ||
1571 | error: | |
1572 | return ret; | |
1573 | } | |
1574 | ||
1575 | /* | |
1576 | * For a specific UST session, enable the channel for all registered apps. | |
1577 | */ | |
35a9059d | 1578 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1579 | struct ltt_ust_channel *uchan) |
1580 | { | |
1581 | int ret = 0; | |
bec39940 | 1582 | struct lttng_ht_iter iter; |
78f0bacd DG |
1583 | struct ust_app *app; |
1584 | struct ust_app_session *ua_sess; | |
1585 | ||
1586 | if (usess == NULL || uchan == NULL) { | |
1587 | ERR("Adding UST global channel to NULL values"); | |
1588 | ret = -1; | |
1589 | goto error; | |
1590 | } | |
1591 | ||
a991f516 MD |
1592 | DBG2("UST app enabling channel %s to global domain for session id %d", |
1593 | uchan->name, usess->id); | |
78f0bacd DG |
1594 | |
1595 | rcu_read_lock(); | |
1596 | ||
1597 | /* For every registered applications */ | |
852d0037 | 1598 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1599 | if (!app->compatible) { |
1600 | /* | |
1601 | * TODO: In time, we should notice the caller of this error by | |
1602 | * telling him that this is a version error. | |
1603 | */ | |
1604 | continue; | |
1605 | } | |
78f0bacd DG |
1606 | ua_sess = lookup_session_by_app(usess, app); |
1607 | if (ua_sess == NULL) { | |
1608 | continue; | |
1609 | } | |
1610 | ||
1611 | /* Enable channel onto application */ | |
1612 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1613 | if (ret < 0) { | |
1614 | /* XXX: We might want to report this error at some point... */ | |
1615 | continue; | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | rcu_read_unlock(); | |
1620 | ||
1621 | error: | |
1622 | return ret; | |
1623 | } | |
1624 | ||
b0a40d28 DG |
1625 | /* |
1626 | * Disable an event in a channel and for a specific session. | |
1627 | */ | |
35a9059d DG |
1628 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
1629 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
1630 | { |
1631 | int ret = 0; | |
bec39940 DG |
1632 | struct lttng_ht_iter iter, uiter; |
1633 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
b0a40d28 DG |
1634 | struct ust_app *app; |
1635 | struct ust_app_session *ua_sess; | |
1636 | struct ust_app_channel *ua_chan; | |
1637 | struct ust_app_event *ua_event; | |
1638 | ||
1639 | DBG("UST app disabling event %s for all apps in channel " | |
a991f516 | 1640 | "%s for session id %d", uevent->attr.name, uchan->name, usess->id); |
b0a40d28 DG |
1641 | |
1642 | rcu_read_lock(); | |
1643 | ||
1644 | /* For all registered applications */ | |
852d0037 | 1645 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1646 | if (!app->compatible) { |
1647 | /* | |
1648 | * TODO: In time, we should notice the caller of this error by | |
1649 | * telling him that this is a version error. | |
1650 | */ | |
1651 | continue; | |
1652 | } | |
b0a40d28 DG |
1653 | ua_sess = lookup_session_by_app(usess, app); |
1654 | if (ua_sess == NULL) { | |
1655 | /* Next app */ | |
1656 | continue; | |
1657 | } | |
1658 | ||
1659 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1660 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1661 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 | 1662 | if (ua_chan_node == NULL) { |
a991f516 | 1663 | DBG2("Channel %s not found in session id %d for app pid %d." |
852d0037 | 1664 | "Skipping", uchan->name, usess->id, app->pid); |
b0a40d28 DG |
1665 | continue; |
1666 | } | |
1667 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1668 | ||
bec39940 DG |
1669 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
1670 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 DG |
1671 | if (ua_event_node == NULL) { |
1672 | DBG2("Event %s not found in channel %s for app pid %d." | |
852d0037 | 1673 | "Skipping", uevent->attr.name, uchan->name, app->pid); |
b0a40d28 DG |
1674 | continue; |
1675 | } | |
1676 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1677 | ||
7f79d3a1 | 1678 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
b0a40d28 DG |
1679 | if (ret < 0) { |
1680 | /* XXX: Report error someday... */ | |
1681 | continue; | |
1682 | } | |
1683 | } | |
1684 | ||
1685 | rcu_read_unlock(); | |
1686 | ||
1687 | return ret; | |
1688 | } | |
1689 | ||
9730260e | 1690 | /* |
edb67388 | 1691 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
1692 | * registered apps. |
1693 | */ | |
35a9059d | 1694 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
1695 | struct ltt_ust_channel *uchan) |
1696 | { | |
1697 | int ret = 0; | |
bec39940 DG |
1698 | struct lttng_ht_iter iter, uiter; |
1699 | struct lttng_ht_node_str *ua_chan_node; | |
9730260e DG |
1700 | struct ust_app *app; |
1701 | struct ust_app_session *ua_sess; | |
1702 | struct ust_app_channel *ua_chan; | |
1703 | struct ust_app_event *ua_event; | |
1704 | ||
1705 | DBG("UST app disabling all event for all apps in channel " | |
a991f516 | 1706 | "%s for session id %d", uchan->name, usess->id); |
9730260e DG |
1707 | |
1708 | rcu_read_lock(); | |
1709 | ||
1710 | /* For all registered applications */ | |
852d0037 | 1711 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1712 | if (!app->compatible) { |
1713 | /* | |
1714 | * TODO: In time, we should notice the caller of this error by | |
1715 | * telling him that this is a version error. | |
1716 | */ | |
1717 | continue; | |
1718 | } | |
9730260e | 1719 | ua_sess = lookup_session_by_app(usess, app); |
edb67388 DG |
1720 | /* If ua_sess is NULL, there is a code flow error */ |
1721 | assert(ua_sess); | |
9730260e DG |
1722 | |
1723 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1724 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1725 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1726 | /* If the channel is not found, there is a code flow error */ |
1727 | assert(ua_chan_node); | |
1728 | ||
9730260e DG |
1729 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1730 | ||
1731 | /* Disable each events of channel */ | |
bec39940 DG |
1732 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
1733 | node.node) { | |
7f79d3a1 | 1734 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
9730260e DG |
1735 | if (ret < 0) { |
1736 | /* XXX: Report error someday... */ | |
1737 | continue; | |
1738 | } | |
1739 | } | |
1740 | } | |
1741 | ||
1742 | rcu_read_unlock(); | |
1743 | ||
1744 | return ret; | |
1745 | } | |
1746 | ||
421cb601 | 1747 | /* |
5b4a0ec0 | 1748 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1749 | */ |
35a9059d | 1750 | int ust_app_create_channel_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1751 | struct ltt_ust_channel *uchan) |
1752 | { | |
bec39940 | 1753 | struct lttng_ht_iter iter; |
48842b30 DG |
1754 | struct ust_app *app; |
1755 | struct ust_app_session *ua_sess; | |
1756 | struct ust_app_channel *ua_chan; | |
1757 | ||
fc34caaa DG |
1758 | /* Very wrong code flow */ |
1759 | assert(usess); | |
1760 | assert(uchan); | |
421cb601 | 1761 | |
a991f516 MD |
1762 | DBG2("UST app adding channel %s to global domain for session id %d", |
1763 | uchan->name, usess->id); | |
48842b30 DG |
1764 | |
1765 | rcu_read_lock(); | |
421cb601 | 1766 | |
5b4a0ec0 | 1767 | /* For every registered applications */ |
852d0037 | 1768 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1769 | if (!app->compatible) { |
1770 | /* | |
1771 | * TODO: In time, we should notice the caller of this error by | |
1772 | * telling him that this is a version error. | |
1773 | */ | |
1774 | continue; | |
1775 | } | |
edb67388 DG |
1776 | /* |
1777 | * Create session on the tracer side and add it to app session HT. Note | |
1778 | * that if session exist, it will simply return a pointer to the ust | |
1779 | * app session. | |
1780 | */ | |
421cb601 | 1781 | ua_sess = create_ust_app_session(usess, app); |
509cbaf8 | 1782 | if (ua_sess == NULL) { |
915d047c | 1783 | /* The malloc() failed. */ |
fc34caaa | 1784 | goto error; |
915d047c DG |
1785 | } else if (ua_sess == (void *) -1UL) { |
1786 | /* The application's socket is not valid. Contiuing */ | |
1787 | continue; | |
48842b30 DG |
1788 | } |
1789 | ||
421cb601 DG |
1790 | /* Create channel onto application */ |
1791 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1792 | if (ua_chan == NULL) { | |
fc34caaa DG |
1793 | /* Major problem here and it's maybe the tracer or malloc() */ |
1794 | goto error; | |
48842b30 | 1795 | } |
48842b30 | 1796 | } |
5b4a0ec0 | 1797 | |
48842b30 DG |
1798 | rcu_read_unlock(); |
1799 | ||
fc34caaa DG |
1800 | return 0; |
1801 | ||
421cb601 | 1802 | error: |
fc34caaa | 1803 | return -1; |
48842b30 DG |
1804 | } |
1805 | ||
5b4a0ec0 | 1806 | /* |
edb67388 | 1807 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 1808 | */ |
35a9059d | 1809 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1810 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1811 | { | |
1812 | int ret = 0; | |
bec39940 DG |
1813 | struct lttng_ht_iter iter, uiter; |
1814 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
48842b30 DG |
1815 | struct ust_app *app; |
1816 | struct ust_app_session *ua_sess; | |
1817 | struct ust_app_channel *ua_chan; | |
1818 | struct ust_app_event *ua_event; | |
48842b30 | 1819 | |
a991f516 MD |
1820 | DBG("UST app enabling event %s for all apps for session id %d", |
1821 | uevent->attr.name, usess->id); | |
48842b30 | 1822 | |
edb67388 DG |
1823 | /* |
1824 | * NOTE: At this point, this function is called only if the session and | |
1825 | * channel passed are already created for all apps. and enabled on the | |
1826 | * tracer also. | |
1827 | */ | |
1828 | ||
48842b30 | 1829 | rcu_read_lock(); |
421cb601 DG |
1830 | |
1831 | /* For all registered applications */ | |
852d0037 | 1832 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1833 | if (!app->compatible) { |
1834 | /* | |
1835 | * TODO: In time, we should notice the caller of this error by | |
1836 | * telling him that this is a version error. | |
1837 | */ | |
1838 | continue; | |
1839 | } | |
edb67388 DG |
1840 | ua_sess = lookup_session_by_app(usess, app); |
1841 | /* If ua_sess is NULL, there is a code flow error */ | |
1842 | assert(ua_sess); | |
ba767faf | 1843 | |
edb67388 | 1844 | /* Lookup channel in the ust app session */ |
bec39940 DG |
1845 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1846 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1847 | /* If the channel is not found, there is a code flow error */ |
1848 | assert(ua_chan_node); | |
1849 | ||
1850 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1851 | ||
bec39940 DG |
1852 | lttng_ht_lookup(ua_chan->events, (void*)uevent->attr.name, &uiter); |
1853 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
35a9059d | 1854 | if (ua_event_node == NULL) { |
7f79d3a1 | 1855 | DBG3("UST app enable event %s not found for app PID %d." |
852d0037 | 1856 | "Skipping app", uevent->attr.name, app->pid); |
35a9059d DG |
1857 | continue; |
1858 | } | |
1859 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1860 | ||
1861 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
1862 | if (ret < 0) { | |
7f79d3a1 | 1863 | goto error; |
48842b30 | 1864 | } |
edb67388 DG |
1865 | } |
1866 | ||
7f79d3a1 | 1867 | error: |
edb67388 | 1868 | rcu_read_unlock(); |
edb67388 DG |
1869 | return ret; |
1870 | } | |
1871 | ||
1872 | /* | |
1873 | * For a specific existing UST session and UST channel, creates the event for | |
1874 | * all registered apps. | |
1875 | */ | |
35a9059d | 1876 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
1877 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1878 | { | |
1879 | int ret = 0; | |
bec39940 DG |
1880 | struct lttng_ht_iter iter, uiter; |
1881 | struct lttng_ht_node_str *ua_chan_node; | |
edb67388 DG |
1882 | struct ust_app *app; |
1883 | struct ust_app_session *ua_sess; | |
1884 | struct ust_app_channel *ua_chan; | |
1885 | ||
a991f516 MD |
1886 | DBG("UST app creating event %s for all apps for session id %d", |
1887 | uevent->attr.name, usess->id); | |
edb67388 | 1888 | |
edb67388 DG |
1889 | rcu_read_lock(); |
1890 | ||
1891 | /* For all registered applications */ | |
852d0037 | 1892 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1893 | if (!app->compatible) { |
1894 | /* | |
1895 | * TODO: In time, we should notice the caller of this error by | |
1896 | * telling him that this is a version error. | |
1897 | */ | |
1898 | continue; | |
1899 | } | |
edb67388 DG |
1900 | ua_sess = lookup_session_by_app(usess, app); |
1901 | /* If ua_sess is NULL, there is a code flow error */ | |
1902 | assert(ua_sess); | |
48842b30 DG |
1903 | |
1904 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1905 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1906 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1907 | /* If the channel is not found, there is a code flow error */ |
1908 | assert(ua_chan_node); | |
1909 | ||
48842b30 DG |
1910 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1911 | ||
edb67388 DG |
1912 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1913 | if (ret < 0) { | |
fc34caaa DG |
1914 | if (ret != -EEXIST) { |
1915 | /* Possible value at this point: -ENOMEM. If so, we stop! */ | |
1916 | break; | |
1917 | } | |
1918 | DBG2("UST app event %s already exist on app PID %d", | |
852d0037 | 1919 | uevent->attr.name, app->pid); |
5b4a0ec0 | 1920 | continue; |
48842b30 | 1921 | } |
48842b30 | 1922 | } |
5b4a0ec0 | 1923 | |
48842b30 DG |
1924 | rcu_read_unlock(); |
1925 | ||
1926 | return ret; | |
1927 | } | |
1928 | ||
5b4a0ec0 DG |
1929 | /* |
1930 | * Start tracing for a specific UST session and app. | |
1931 | */ | |
421cb601 | 1932 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1933 | { |
1934 | int ret = 0; | |
bec39940 | 1935 | struct lttng_ht_iter iter; |
48842b30 DG |
1936 | struct ust_app_session *ua_sess; |
1937 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 1938 | struct ltt_ust_stream *ustream; |
7753dea8 | 1939 | int consumerd_fd; |
48842b30 | 1940 | |
852d0037 | 1941 | DBG("Starting tracing for ust app pid %d", app->pid); |
5cf5d0e7 | 1942 | |
509cbaf8 MD |
1943 | rcu_read_lock(); |
1944 | ||
e0c7ec2b DG |
1945 | if (!app->compatible) { |
1946 | goto end; | |
1947 | } | |
1948 | ||
421cb601 DG |
1949 | ua_sess = lookup_session_by_app(usess, app); |
1950 | if (ua_sess == NULL) { | |
509cbaf8 | 1951 | goto error_rcu_unlock; |
421cb601 | 1952 | } |
48842b30 | 1953 | |
aea829b3 DG |
1954 | /* Upon restart, we skip the setup, already done */ |
1955 | if (ua_sess->started) { | |
8be98f9a | 1956 | goto skip_setup; |
aea829b3 | 1957 | } |
8be98f9a | 1958 | |
f848c3eb DG |
1959 | /* Indicate that the session has been started once */ |
1960 | ua_sess->started = 1; | |
1961 | ||
421cb601 DG |
1962 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1963 | if (ret < 0) { | |
509cbaf8 | 1964 | goto error_rcu_unlock; |
421cb601 | 1965 | } |
48842b30 | 1966 | |
421cb601 | 1967 | /* For each channel */ |
bec39940 DG |
1968 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
1969 | node.node) { | |
421cb601 DG |
1970 | /* Create all streams */ |
1971 | while (1) { | |
5b4a0ec0 | 1972 | /* Create UST stream */ |
421cb601 DG |
1973 | ustream = zmalloc(sizeof(*ustream)); |
1974 | if (ustream == NULL) { | |
1975 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1976 | goto error_rcu_unlock; |
421cb601 | 1977 | } |
48842b30 | 1978 | |
852d0037 | 1979 | ret = ustctl_create_stream(app->sock, ua_chan->obj, |
421cb601 | 1980 | &ustream->obj); |
48842b30 | 1981 | if (ret < 0) { |
421cb601 DG |
1982 | /* Got all streams */ |
1983 | break; | |
48842b30 | 1984 | } |
421cb601 | 1985 | ustream->handle = ustream->obj->handle; |
48842b30 | 1986 | |
421cb601 DG |
1987 | /* Order is important */ |
1988 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
477d7741 MD |
1989 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", |
1990 | ua_sess->path, ua_chan->name, | |
1991 | ua_chan->streams.count++); | |
aba8e916 DG |
1992 | if (ret < 0) { |
1993 | PERROR("asprintf UST create stream"); | |
421cb601 | 1994 | continue; |
aba8e916 | 1995 | } |
421cb601 DG |
1996 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1997 | ustream->pathname); | |
1998 | } | |
421cb601 | 1999 | } |
aba8e916 | 2000 | |
7753dea8 MD |
2001 | switch (app->bits_per_long) { |
2002 | case 64: | |
2003 | consumerd_fd = ust_consumerd64_fd; | |
2004 | break; | |
2005 | case 32: | |
2006 | consumerd_fd = ust_consumerd32_fd; | |
2007 | break; | |
2008 | default: | |
2009 | ret = -EINVAL; | |
2010 | goto error_rcu_unlock; | |
2011 | } | |
aea829b3 | 2012 | |
421cb601 | 2013 | /* Setup UST consumer socket and send fds to it */ |
7753dea8 | 2014 | ret = ust_consumer_send_session(consumerd_fd, ua_sess); |
421cb601 | 2015 | if (ret < 0) { |
509cbaf8 | 2016 | goto error_rcu_unlock; |
421cb601 | 2017 | } |
48842b30 | 2018 | |
8be98f9a | 2019 | skip_setup: |
421cb601 | 2020 | /* This start the UST tracing */ |
852d0037 | 2021 | ret = ustctl_start_session(app->sock, ua_sess->handle); |
421cb601 | 2022 | if (ret < 0) { |
852d0037 | 2023 | ERR("Error starting tracing for app pid: %d", app->pid); |
509cbaf8 | 2024 | goto error_rcu_unlock; |
421cb601 | 2025 | } |
5b4a0ec0 | 2026 | |
421cb601 | 2027 | /* Quiescent wait after starting trace */ |
852d0037 | 2028 | ustctl_wait_quiescent(app->sock); |
48842b30 | 2029 | |
e0c7ec2b DG |
2030 | end: |
2031 | rcu_read_unlock(); | |
421cb601 | 2032 | return 0; |
48842b30 | 2033 | |
509cbaf8 MD |
2034 | error_rcu_unlock: |
2035 | rcu_read_unlock(); | |
421cb601 DG |
2036 | return -1; |
2037 | } | |
48842b30 | 2038 | |
8be98f9a MD |
2039 | /* |
2040 | * Stop tracing for a specific UST session and app. | |
2041 | */ | |
2042 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2043 | { | |
2044 | int ret = 0; | |
bec39940 | 2045 | struct lttng_ht_iter iter; |
8be98f9a | 2046 | struct ust_app_session *ua_sess; |
6d3686da | 2047 | struct ust_app_channel *ua_chan; |
8be98f9a | 2048 | |
852d0037 | 2049 | DBG("Stopping tracing for ust app pid %d", app->pid); |
8be98f9a MD |
2050 | |
2051 | rcu_read_lock(); | |
2052 | ||
e0c7ec2b DG |
2053 | if (!app->compatible) { |
2054 | goto end; | |
2055 | } | |
2056 | ||
8be98f9a MD |
2057 | ua_sess = lookup_session_by_app(usess, app); |
2058 | if (ua_sess == NULL) { | |
2059 | /* Only malloc can failed so something is really wrong */ | |
2060 | goto error_rcu_unlock; | |
2061 | } | |
2062 | ||
9bc07046 DG |
2063 | /* |
2064 | * If started = 0, it means that stop trace has been called for a session | |
2065 | * that was never started. This is a code flow error and should never | |
2066 | * happen. | |
2067 | */ | |
2068 | assert(ua_sess->started == 1); | |
7db205b5 | 2069 | |
9d6c7d3f | 2070 | /* This inhibits UST tracing */ |
852d0037 | 2071 | ret = ustctl_stop_session(app->sock, ua_sess->handle); |
9d6c7d3f | 2072 | if (ret < 0) { |
852d0037 | 2073 | ERR("Error stopping tracing for app pid: %d", app->pid); |
9d6c7d3f DG |
2074 | goto error_rcu_unlock; |
2075 | } | |
2076 | ||
2077 | /* Quiescent wait after stopping trace */ | |
852d0037 | 2078 | ustctl_wait_quiescent(app->sock); |
9d6c7d3f DG |
2079 | |
2080 | /* Flushing buffers */ | |
bec39940 DG |
2081 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2082 | node.node) { | |
852d0037 | 2083 | ret = ustctl_sock_flush_buffer(app->sock, ua_chan->obj); |
8be98f9a | 2084 | if (ret < 0) { |
7db205b5 | 2085 | ERR("UST app PID %d channel %s flush failed with ret %d", |
852d0037 | 2086 | app->pid, ua_chan->name, ret); |
6d3686da DG |
2087 | /* Continuing flushing all buffers */ |
2088 | continue; | |
8be98f9a MD |
2089 | } |
2090 | } | |
8be98f9a | 2091 | |
90d97d10 | 2092 | /* Flush all buffers before stopping */ |
852d0037 | 2093 | ret = ustctl_sock_flush_buffer(app->sock, ua_sess->metadata->obj); |
90d97d10 | 2094 | if (ret < 0) { |
852d0037 | 2095 | ERR("UST app PID %d metadata flush failed with ret %d", app->pid, |
7db205b5 | 2096 | ret); |
90d97d10 DG |
2097 | } |
2098 | ||
7db205b5 DG |
2099 | end: |
2100 | rcu_read_unlock(); | |
8be98f9a MD |
2101 | return 0; |
2102 | ||
2103 | error_rcu_unlock: | |
2104 | rcu_read_unlock(); | |
2105 | return -1; | |
2106 | } | |
2107 | ||
84cd17c6 MD |
2108 | /* |
2109 | * Destroy a specific UST session in apps. | |
2110 | */ | |
2111 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2112 | { | |
2113 | struct ust_app_session *ua_sess; | |
2114 | struct lttng_ust_object_data obj; | |
bec39940 DG |
2115 | struct lttng_ht_iter iter; |
2116 | struct lttng_ht_node_ulong *node; | |
525b0740 | 2117 | int ret; |
84cd17c6 | 2118 | |
852d0037 | 2119 | DBG("Destroy tracing for ust app pid %d", app->pid); |
84cd17c6 MD |
2120 | |
2121 | rcu_read_lock(); | |
2122 | ||
e0c7ec2b DG |
2123 | if (!app->compatible) { |
2124 | goto end; | |
2125 | } | |
2126 | ||
84cd17c6 | 2127 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 2128 | node = lttng_ht_iter_get_node_ulong(&iter); |
84cd17c6 MD |
2129 | if (node == NULL) { |
2130 | /* Only malloc can failed so something is really wrong */ | |
2131 | goto error_rcu_unlock; | |
2132 | } | |
2133 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
bec39940 | 2134 | ret = lttng_ht_del(app->sessions, &iter); |
525b0740 | 2135 | assert(!ret); |
84cd17c6 MD |
2136 | obj.handle = ua_sess->handle; |
2137 | obj.shm_fd = -1; | |
2138 | obj.wait_fd = -1; | |
2139 | obj.memory_map_size = 0; | |
852d0037 | 2140 | ustctl_release_object(app->sock, &obj); |
84cd17c6 | 2141 | |
852d0037 | 2142 | delete_ust_app_session(app->sock, ua_sess); |
7db205b5 | 2143 | |
84cd17c6 | 2144 | /* Quiescent wait after stopping trace */ |
852d0037 | 2145 | ustctl_wait_quiescent(app->sock); |
84cd17c6 | 2146 | |
e0c7ec2b DG |
2147 | end: |
2148 | rcu_read_unlock(); | |
84cd17c6 MD |
2149 | return 0; |
2150 | ||
2151 | error_rcu_unlock: | |
2152 | rcu_read_unlock(); | |
2153 | return -1; | |
2154 | } | |
2155 | ||
5b4a0ec0 DG |
2156 | /* |
2157 | * Start tracing for the UST session. | |
2158 | */ | |
421cb601 DG |
2159 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
2160 | { | |
2161 | int ret = 0; | |
bec39940 | 2162 | struct lttng_ht_iter iter; |
421cb601 | 2163 | struct ust_app *app; |
48842b30 | 2164 | |
421cb601 DG |
2165 | DBG("Starting all UST traces"); |
2166 | ||
2167 | rcu_read_lock(); | |
421cb601 | 2168 | |
852d0037 | 2169 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
421cb601 | 2170 | ret = ust_app_start_trace(usess, app); |
48842b30 | 2171 | if (ret < 0) { |
5b4a0ec0 DG |
2172 | /* Continue to next apps even on error */ |
2173 | continue; | |
48842b30 | 2174 | } |
48842b30 | 2175 | } |
5b4a0ec0 | 2176 | |
48842b30 DG |
2177 | rcu_read_unlock(); |
2178 | ||
2179 | return 0; | |
2180 | } | |
487cf67c | 2181 | |
8be98f9a MD |
2182 | /* |
2183 | * Start tracing for the UST session. | |
2184 | */ | |
2185 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
2186 | { | |
2187 | int ret = 0; | |
bec39940 | 2188 | struct lttng_ht_iter iter; |
8be98f9a MD |
2189 | struct ust_app *app; |
2190 | ||
2191 | DBG("Stopping all UST traces"); | |
2192 | ||
2193 | rcu_read_lock(); | |
2194 | ||
852d0037 | 2195 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
8be98f9a MD |
2196 | ret = ust_app_stop_trace(usess, app); |
2197 | if (ret < 0) { | |
2198 | /* Continue to next apps even on error */ | |
2199 | continue; | |
2200 | } | |
2201 | } | |
2202 | ||
2203 | rcu_read_unlock(); | |
2204 | ||
2205 | return 0; | |
2206 | } | |
2207 | ||
84cd17c6 MD |
2208 | /* |
2209 | * Destroy app UST session. | |
2210 | */ | |
2211 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
2212 | { | |
2213 | int ret = 0; | |
bec39940 | 2214 | struct lttng_ht_iter iter; |
84cd17c6 MD |
2215 | struct ust_app *app; |
2216 | ||
2217 | DBG("Destroy all UST traces"); | |
2218 | ||
2219 | rcu_read_lock(); | |
2220 | ||
852d0037 | 2221 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
84cd17c6 MD |
2222 | ret = ust_app_destroy_trace(usess, app); |
2223 | if (ret < 0) { | |
2224 | /* Continue to next apps even on error */ | |
2225 | continue; | |
2226 | } | |
2227 | } | |
2228 | ||
2229 | rcu_read_unlock(); | |
2230 | ||
2231 | return 0; | |
2232 | } | |
2233 | ||
5b4a0ec0 DG |
2234 | /* |
2235 | * Add channels/events from UST global domain to registered apps at sock. | |
2236 | */ | |
487cf67c DG |
2237 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
2238 | { | |
55c54cce | 2239 | int ret = 0; |
727d5404 | 2240 | struct lttng_ht_iter iter, uiter, iter_ctx; |
487cf67c DG |
2241 | struct ust_app *app; |
2242 | struct ust_app_session *ua_sess; | |
2243 | struct ust_app_channel *ua_chan; | |
2244 | struct ust_app_event *ua_event; | |
727d5404 | 2245 | struct ust_app_ctx *ua_ctx; |
1f3580c7 DG |
2246 | |
2247 | if (usess == NULL) { | |
5b4a0ec0 | 2248 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
2249 | goto error; |
2250 | } | |
2251 | ||
a991f516 MD |
2252 | DBG2("UST app global update for app sock %d for session id %d", sock, |
2253 | usess->id); | |
487cf67c | 2254 | |
284d8f55 DG |
2255 | rcu_read_lock(); |
2256 | ||
487cf67c DG |
2257 | app = find_app_by_sock(sock); |
2258 | if (app == NULL) { | |
2259 | ERR("Failed to update app sock %d", sock); | |
2260 | goto error; | |
2261 | } | |
2262 | ||
e0c7ec2b DG |
2263 | if (!app->compatible) { |
2264 | goto error; | |
2265 | } | |
2266 | ||
421cb601 | 2267 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 2268 | if (ua_sess == NULL) { |
487cf67c DG |
2269 | goto error; |
2270 | } | |
2271 | ||
284d8f55 DG |
2272 | /* |
2273 | * We can iterate safely here over all UST app session sicne the create ust | |
2274 | * app session above made a shadow copy of the UST global domain from the | |
2275 | * ltt ust session. | |
2276 | */ | |
bec39940 DG |
2277 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2278 | node.node) { | |
284d8f55 DG |
2279 | ret = create_ust_channel(app, ua_sess, ua_chan); |
2280 | if (ret < 0) { | |
2281 | /* FIXME: Should we quit here or continue... */ | |
2282 | continue; | |
487cf67c DG |
2283 | } |
2284 | ||
727d5404 DG |
2285 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter_ctx.iter, ua_ctx, |
2286 | node.node) { | |
2287 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
2288 | if (ret < 0) { | |
2289 | /* FIXME: Should we quit here or continue... */ | |
2290 | continue; | |
2291 | } | |
2292 | } | |
2293 | ||
2294 | ||
284d8f55 | 2295 | /* For each events */ |
bec39940 DG |
2296 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
2297 | node.node) { | |
284d8f55 DG |
2298 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
2299 | if (ret < 0) { | |
2300 | /* FIXME: Should we quit here or continue... */ | |
2301 | continue; | |
487cf67c | 2302 | } |
727d5404 DG |
2303 | |
2304 | /* Add context on events. */ | |
2305 | cds_lfht_for_each_entry(ua_event->ctx->ht, &iter_ctx.iter, | |
2306 | ua_ctx, node.node) { | |
2307 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
2308 | if (ret < 0) { | |
2309 | /* FIXME: Should we quit here or continue... */ | |
2310 | continue; | |
2311 | } | |
2312 | } | |
36dc12cc | 2313 | } |
487cf67c DG |
2314 | } |
2315 | ||
36dc12cc | 2316 | if (usess->start_trace) { |
421cb601 | 2317 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 2318 | if (ret < 0) { |
36dc12cc DG |
2319 | goto error; |
2320 | } | |
2321 | ||
852d0037 | 2322 | DBG2("UST trace started for app pid %d", app->pid); |
36dc12cc DG |
2323 | } |
2324 | ||
487cf67c DG |
2325 | error: |
2326 | rcu_read_unlock(); | |
2327 | return; | |
2328 | } | |
55cc08a6 DG |
2329 | |
2330 | /* | |
2331 | * Add context to a specific channel for global UST domain. | |
2332 | */ | |
2333 | int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess, | |
2334 | struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx) | |
2335 | { | |
2336 | int ret = 0; | |
bec39940 DG |
2337 | struct lttng_ht_node_str *ua_chan_node; |
2338 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2339 | struct ust_app_channel *ua_chan = NULL; |
2340 | struct ust_app_session *ua_sess; | |
2341 | struct ust_app *app; | |
2342 | ||
2343 | rcu_read_lock(); | |
2344 | ||
852d0037 | 2345 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2346 | if (!app->compatible) { |
2347 | /* | |
2348 | * TODO: In time, we should notice the caller of this error by | |
2349 | * telling him that this is a version error. | |
2350 | */ | |
2351 | continue; | |
2352 | } | |
55cc08a6 DG |
2353 | ua_sess = lookup_session_by_app(usess, app); |
2354 | if (ua_sess == NULL) { | |
2355 | continue; | |
2356 | } | |
2357 | ||
2358 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2359 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2360 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2361 | if (ua_chan_node == NULL) { |
2362 | continue; | |
2363 | } | |
2364 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2365 | node); | |
2366 | ||
2367 | ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app); | |
2368 | if (ret < 0) { | |
2369 | continue; | |
2370 | } | |
2371 | } | |
2372 | ||
55cc08a6 DG |
2373 | rcu_read_unlock(); |
2374 | return ret; | |
2375 | } | |
2376 | ||
2377 | /* | |
2378 | * Add context to a specific event in a channel for global UST domain. | |
2379 | */ | |
2380 | int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess, | |
2381 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
2382 | struct ltt_ust_context *uctx) | |
2383 | { | |
2384 | int ret = 0; | |
bec39940 DG |
2385 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; |
2386 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2387 | struct ust_app_session *ua_sess; |
2388 | struct ust_app_event *ua_event; | |
2389 | struct ust_app_channel *ua_chan = NULL; | |
2390 | struct ust_app *app; | |
2391 | ||
2392 | rcu_read_lock(); | |
2393 | ||
852d0037 | 2394 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2395 | if (!app->compatible) { |
2396 | /* | |
2397 | * TODO: In time, we should notice the caller of this error by | |
2398 | * telling him that this is a version error. | |
2399 | */ | |
2400 | continue; | |
2401 | } | |
55cc08a6 DG |
2402 | ua_sess = lookup_session_by_app(usess, app); |
2403 | if (ua_sess == NULL) { | |
2404 | continue; | |
2405 | } | |
2406 | ||
2407 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2408 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2409 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2410 | if (ua_chan_node == NULL) { |
2411 | continue; | |
2412 | } | |
2413 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2414 | node); | |
2415 | ||
bec39940 DG |
2416 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
2417 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2418 | if (ua_event_node == NULL) { |
2419 | continue; | |
2420 | } | |
2421 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, | |
2422 | node); | |
2423 | ||
2424 | ret = create_ust_app_event_context(ua_sess, ua_event, &uctx->ctx, app); | |
2425 | if (ret < 0) { | |
2426 | continue; | |
2427 | } | |
2428 | } | |
2429 | ||
55cc08a6 DG |
2430 | rcu_read_unlock(); |
2431 | return ret; | |
2432 | } | |
76d45b40 DG |
2433 | |
2434 | /* | |
2435 | * Enable event for a channel from a UST session for a specific PID. | |
2436 | */ | |
2437 | int ust_app_enable_event_pid(struct ltt_ust_session *usess, | |
2438 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2439 | { | |
2440 | int ret = 0; | |
bec39940 DG |
2441 | struct lttng_ht_iter iter; |
2442 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
76d45b40 DG |
2443 | struct ust_app *app; |
2444 | struct ust_app_session *ua_sess; | |
2445 | struct ust_app_channel *ua_chan; | |
2446 | struct ust_app_event *ua_event; | |
2447 | ||
2448 | DBG("UST app enabling event %s for PID %d", uevent->attr.name, pid); | |
2449 | ||
2450 | rcu_read_lock(); | |
2451 | ||
2452 | app = ust_app_find_by_pid(pid); | |
2453 | if (app == NULL) { | |
2454 | ERR("UST app enable event per PID %d not found", pid); | |
2455 | ret = -1; | |
2456 | goto error; | |
2457 | } | |
2458 | ||
e0c7ec2b DG |
2459 | if (!app->compatible) { |
2460 | ret = 0; | |
2461 | goto error; | |
2462 | } | |
2463 | ||
76d45b40 DG |
2464 | ua_sess = lookup_session_by_app(usess, app); |
2465 | /* If ua_sess is NULL, there is a code flow error */ | |
2466 | assert(ua_sess); | |
2467 | ||
2468 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2469 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2470 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2471 | /* If the channel is not found, there is a code flow error */ |
2472 | assert(ua_chan_node); | |
2473 | ||
2474 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2475 | ||
bec39940 DG |
2476 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2477 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2478 | if (ua_event_node == NULL) { |
2479 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); | |
2480 | if (ret < 0) { | |
2481 | goto error; | |
2482 | } | |
2483 | } else { | |
2484 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2485 | ||
2486 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2487 | if (ret < 0) { | |
2488 | goto error; | |
2489 | } | |
2490 | } | |
2491 | ||
2492 | error: | |
2493 | rcu_read_unlock(); | |
2494 | return ret; | |
2495 | } | |
7f79d3a1 DG |
2496 | |
2497 | /* | |
2498 | * Disable event for a channel from a UST session for a specific PID. | |
2499 | */ | |
2500 | int ust_app_disable_event_pid(struct ltt_ust_session *usess, | |
2501 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2502 | { | |
2503 | int ret = 0; | |
bec39940 DG |
2504 | struct lttng_ht_iter iter; |
2505 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
7f79d3a1 DG |
2506 | struct ust_app *app; |
2507 | struct ust_app_session *ua_sess; | |
2508 | struct ust_app_channel *ua_chan; | |
2509 | struct ust_app_event *ua_event; | |
2510 | ||
2511 | DBG("UST app disabling event %s for PID %d", uevent->attr.name, pid); | |
2512 | ||
2513 | rcu_read_lock(); | |
2514 | ||
2515 | app = ust_app_find_by_pid(pid); | |
2516 | if (app == NULL) { | |
2517 | ERR("UST app disable event per PID %d not found", pid); | |
2518 | ret = -1; | |
2519 | goto error; | |
2520 | } | |
2521 | ||
e0c7ec2b DG |
2522 | if (!app->compatible) { |
2523 | ret = 0; | |
2524 | goto error; | |
2525 | } | |
2526 | ||
7f79d3a1 DG |
2527 | ua_sess = lookup_session_by_app(usess, app); |
2528 | /* If ua_sess is NULL, there is a code flow error */ | |
2529 | assert(ua_sess); | |
2530 | ||
2531 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2532 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2533 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2534 | if (ua_chan_node == NULL) { |
2535 | /* Channel does not exist, skip disabling */ | |
2536 | goto error; | |
2537 | } | |
2538 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2539 | ||
bec39940 DG |
2540 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2541 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2542 | if (ua_event_node == NULL) { |
2543 | /* Event does not exist, skip disabling */ | |
2544 | goto error; | |
2545 | } | |
2546 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2547 | ||
2548 | ret = disable_ust_app_event(ua_sess, ua_event, app); | |
2549 | if (ret < 0) { | |
2550 | goto error; | |
2551 | } | |
2552 | ||
2553 | error: | |
2554 | rcu_read_unlock(); | |
2555 | return ret; | |
2556 | } | |
e0c7ec2b DG |
2557 | |
2558 | /* | |
2559 | * Validate version of UST apps and set the compatible bit. | |
2560 | */ | |
2561 | int ust_app_validate_version(int sock) | |
2562 | { | |
2563 | int ret; | |
2564 | struct ust_app *app; | |
2565 | ||
2566 | rcu_read_lock(); | |
2567 | ||
2568 | app = find_app_by_sock(sock); | |
2569 | assert(app); | |
2570 | ||
2571 | ret = ustctl_tracer_version(sock, &app->version); | |
2572 | if (ret < 0) { | |
2573 | goto error; | |
2574 | } | |
2575 | ||
2576 | /* Validate version */ | |
2577 | if (app->version.major > UST_APP_MAJOR_VERSION) { | |
2578 | goto error; | |
2579 | } | |
2580 | ||
2581 | DBG2("UST app PID %d is compatible with major version %d " | |
852d0037 | 2582 | "(supporting <= %d)", app->pid, app->version.major, |
e0c7ec2b DG |
2583 | UST_APP_MAJOR_VERSION); |
2584 | app->compatible = 1; | |
2585 | rcu_read_unlock(); | |
2586 | return 0; | |
2587 | ||
2588 | error: | |
2589 | DBG2("UST app PID %d is not compatible with major version %d " | |
852d0037 | 2590 | "(supporting <= %d)", app->pid, app->version.major, |
e0c7ec2b DG |
2591 | UST_APP_MAJOR_VERSION); |
2592 | app->compatible = 0; | |
2593 | rcu_read_unlock(); | |
2594 | return -1; | |
2595 | } | |
4466912f DG |
2596 | |
2597 | /* | |
2598 | * Calibrate registered applications. | |
2599 | */ | |
2600 | int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate) | |
2601 | { | |
2602 | int ret = 0; | |
2603 | struct lttng_ht_iter iter; | |
2604 | struct ust_app *app; | |
2605 | ||
2606 | rcu_read_lock(); | |
2607 | ||
852d0037 | 2608 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
4466912f DG |
2609 | if (!app->compatible) { |
2610 | /* | |
2611 | * TODO: In time, we should notice the caller of this error by | |
2612 | * telling him that this is a version error. | |
2613 | */ | |
2614 | continue; | |
2615 | } | |
2616 | ||
852d0037 | 2617 | ret = ustctl_calibrate(app->sock, calibrate); |
4466912f DG |
2618 | if (ret < 0) { |
2619 | switch (ret) { | |
2620 | case -ENOSYS: | |
2621 | /* Means that it's not implemented on the tracer side. */ | |
2622 | ret = 0; | |
2623 | break; | |
2624 | default: | |
2625 | /* TODO: Report error to user */ | |
2626 | DBG2("Calibrate app PID %d returned with error %d", | |
852d0037 | 2627 | app->pid, ret); |
4466912f DG |
2628 | break; |
2629 | } | |
2630 | } | |
2631 | } | |
2632 | ||
2633 | DBG("UST app global domain calibration finished"); | |
2634 | ||
2635 | rcu_read_unlock(); | |
2636 | ||
2637 | return ret; | |
2638 | } |