Commit | Line | Data |
---|---|---|
91d76f53 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
82a3637f DG |
6 | * as published by the Free Software Foundation; only version 2 |
7 | * of the License. | |
91d76f53 DG |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <errno.h> | |
21 | #include <pthread.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
099e26bd | 24 | #include <string.h> |
aba8e916 DG |
25 | #include <sys/stat.h> |
26 | #include <sys/types.h> | |
099e26bd | 27 | #include <unistd.h> |
0df502fd | 28 | #include <urcu/compiler.h> |
bec39940 | 29 | |
990570ed | 30 | #include <common/common.h> |
1e307fab | 31 | |
56fff090 | 32 | #include "ust-app.h" |
48842b30 | 33 | #include "ust-consumer.h" |
d80a6244 DG |
34 | #include "ust-ctl.h" |
35 | ||
55cc08a6 DG |
36 | /* |
37 | * Delete ust context safely. RCU read lock must be held before calling | |
38 | * this function. | |
39 | */ | |
40 | static | |
41 | void delete_ust_app_ctx(int sock, struct ust_app_ctx *ua_ctx) | |
42 | { | |
43 | if (ua_ctx->obj) { | |
44 | ustctl_release_object(sock, ua_ctx->obj); | |
45 | free(ua_ctx->obj); | |
46 | } | |
47 | free(ua_ctx); | |
48 | } | |
49 | ||
d80a6244 DG |
50 | /* |
51 | * Delete ust app event safely. RCU read lock must be held before calling | |
52 | * this function. | |
53 | */ | |
8b366481 DG |
54 | static |
55 | void delete_ust_app_event(int sock, struct ust_app_event *ua_event) | |
d80a6244 | 56 | { |
55cc08a6 | 57 | int ret; |
bec39940 | 58 | struct lttng_ht_iter iter; |
55cc08a6 DG |
59 | struct ust_app_ctx *ua_ctx; |
60 | ||
fc34caaa | 61 | /* Destroy each context of event */ |
bec39940 DG |
62 | cds_lfht_for_each_entry(ua_event->ctx->ht, &iter.iter, ua_ctx, |
63 | node.node) { | |
64 | ret = lttng_ht_del(ua_event->ctx, &iter); | |
55cc08a6 DG |
65 | assert(!ret); |
66 | delete_ust_app_ctx(sock, ua_ctx); | |
67 | } | |
bec39940 | 68 | lttng_ht_destroy(ua_event->ctx); |
d80a6244 | 69 | |
edb67388 DG |
70 | if (ua_event->obj != NULL) { |
71 | ustctl_release_object(sock, ua_event->obj); | |
72 | free(ua_event->obj); | |
73 | } | |
d80a6244 DG |
74 | free(ua_event); |
75 | } | |
76 | ||
77 | /* | |
78 | * Delete ust app stream safely. RCU read lock must be held before calling | |
79 | * this function. | |
80 | */ | |
8b366481 DG |
81 | static |
82 | void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream) | |
d80a6244 | 83 | { |
8b366481 DG |
84 | if (stream->obj) { |
85 | ustctl_release_object(sock, stream->obj); | |
86 | free(stream->obj); | |
87 | } | |
84cd17c6 | 88 | free(stream); |
d80a6244 DG |
89 | } |
90 | ||
91 | /* | |
92 | * Delete ust app channel safely. RCU read lock must be held before calling | |
93 | * this function. | |
94 | */ | |
8b366481 DG |
95 | static |
96 | void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan) | |
d80a6244 DG |
97 | { |
98 | int ret; | |
bec39940 | 99 | struct lttng_ht_iter iter; |
d80a6244 | 100 | struct ust_app_event *ua_event; |
55cc08a6 | 101 | struct ust_app_ctx *ua_ctx; |
d80a6244 DG |
102 | struct ltt_ust_stream *stream, *stmp; |
103 | ||
55cc08a6 | 104 | /* Wipe stream */ |
d80a6244 | 105 | cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) { |
84cd17c6 | 106 | cds_list_del(&stream->list); |
d80a6244 DG |
107 | delete_ust_app_stream(sock, stream); |
108 | } | |
109 | ||
55cc08a6 | 110 | /* Wipe context */ |
bec39940 DG |
111 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter.iter, ua_ctx, node.node) { |
112 | ret = lttng_ht_del(ua_chan->ctx, &iter); | |
55cc08a6 DG |
113 | assert(!ret); |
114 | delete_ust_app_ctx(sock, ua_ctx); | |
115 | } | |
bec39940 | 116 | lttng_ht_destroy(ua_chan->ctx); |
d80a6244 | 117 | |
55cc08a6 | 118 | /* Wipe events */ |
bec39940 DG |
119 | cds_lfht_for_each_entry(ua_chan->events->ht, &iter.iter, ua_event, |
120 | node.node) { | |
121 | ret = lttng_ht_del(ua_chan->events, &iter); | |
525b0740 | 122 | assert(!ret); |
d80a6244 DG |
123 | delete_ust_app_event(sock, ua_event); |
124 | } | |
bec39940 | 125 | lttng_ht_destroy(ua_chan->events); |
edb67388 DG |
126 | |
127 | if (ua_chan->obj != NULL) { | |
128 | ustctl_release_object(sock, ua_chan->obj); | |
129 | free(ua_chan->obj); | |
130 | } | |
84cd17c6 | 131 | free(ua_chan); |
d80a6244 DG |
132 | } |
133 | ||
134 | /* | |
135 | * Delete ust app session safely. RCU read lock must be held before calling | |
136 | * this function. | |
137 | */ | |
8b366481 DG |
138 | static |
139 | void delete_ust_app_session(int sock, struct ust_app_session *ua_sess) | |
d80a6244 DG |
140 | { |
141 | int ret; | |
bec39940 | 142 | struct lttng_ht_iter iter; |
d80a6244 DG |
143 | struct ust_app_channel *ua_chan; |
144 | ||
145 | if (ua_sess->metadata) { | |
8b366481 DG |
146 | if (ua_sess->metadata->stream_obj) { |
147 | ustctl_release_object(sock, ua_sess->metadata->stream_obj); | |
148 | free(ua_sess->metadata->stream_obj); | |
149 | } | |
150 | if (ua_sess->metadata->obj) { | |
151 | ustctl_release_object(sock, ua_sess->metadata->obj); | |
152 | free(ua_sess->metadata->obj); | |
153 | } | |
d80a6244 DG |
154 | } |
155 | ||
bec39940 DG |
156 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
157 | node.node) { | |
158 | ret = lttng_ht_del(ua_sess->channels, &iter); | |
525b0740 | 159 | assert(!ret); |
d80a6244 DG |
160 | delete_ust_app_channel(sock, ua_chan); |
161 | } | |
bec39940 | 162 | lttng_ht_destroy(ua_sess->channels); |
d80a6244 | 163 | |
aee6bafd MD |
164 | if (ua_sess->handle != -1) { |
165 | ustctl_release_handle(sock, ua_sess->handle); | |
166 | } | |
8b366481 | 167 | free(ua_sess); |
d80a6244 | 168 | } |
91d76f53 DG |
169 | |
170 | /* | |
284d8f55 DG |
171 | * Delete a traceable application structure from the global list. Never call |
172 | * this function outside of a call_rcu call. | |
91d76f53 | 173 | */ |
8b366481 DG |
174 | static |
175 | void delete_ust_app(struct ust_app *app) | |
91d76f53 | 176 | { |
8b366481 | 177 | int ret, sock; |
bec39940 | 178 | struct lttng_ht_iter iter; |
284d8f55 | 179 | struct ust_app_session *ua_sess; |
44d3bd01 | 180 | |
f6a9efaa | 181 | rcu_read_lock(); |
44d3bd01 | 182 | |
d80a6244 | 183 | /* Delete ust app sessions info */ |
6414a713 MD |
184 | sock = app->key.sock; |
185 | app->key.sock = -1; | |
d80a6244 | 186 | |
8b366481 | 187 | /* Wipe sessions */ |
bec39940 DG |
188 | cds_lfht_for_each_entry(app->sessions->ht, &iter.iter, ua_sess, |
189 | node.node) { | |
190 | ret = lttng_ht_del(app->sessions, &iter); | |
525b0740 | 191 | assert(!ret); |
284d8f55 | 192 | delete_ust_app_session(app->key.sock, ua_sess); |
d80a6244 | 193 | } |
bec39940 | 194 | lttng_ht_destroy(app->sessions); |
d80a6244 | 195 | |
6414a713 | 196 | /* |
bec39940 DG |
197 | * Wait until we have removed the key from the sock hash table before |
198 | * closing this socket, otherwise an application could re-use the socket ID | |
199 | * and race with the teardown, using the same hash table entry. | |
6414a713 | 200 | */ |
799e2c4f MD |
201 | ret = close(sock); |
202 | if (ret) { | |
203 | PERROR("close"); | |
204 | } | |
d80a6244 | 205 | |
284d8f55 DG |
206 | DBG2("UST app pid %d deleted", app->key.pid); |
207 | free(app); | |
bec39940 | 208 | |
f6a9efaa | 209 | rcu_read_unlock(); |
099e26bd DG |
210 | } |
211 | ||
212 | /* | |
f6a9efaa | 213 | * URCU intermediate call to delete an UST app. |
099e26bd | 214 | */ |
8b366481 DG |
215 | static |
216 | void delete_ust_app_rcu(struct rcu_head *head) | |
099e26bd | 217 | { |
bec39940 DG |
218 | struct lttng_ht_node_ulong *node = |
219 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
220 | struct ust_app *app = |
221 | caa_container_of(node, struct ust_app, node); | |
222 | ||
bec39940 | 223 | DBG3("Call RCU deleting app PID %d", app->key.pid); |
f6a9efaa | 224 | delete_ust_app(app); |
099e26bd DG |
225 | } |
226 | ||
8b366481 DG |
227 | /* |
228 | * Alloc new UST app session. | |
229 | */ | |
230 | static | |
231 | struct ust_app_session *alloc_ust_app_session(void) | |
232 | { | |
233 | struct ust_app_session *ua_sess; | |
234 | ||
235 | /* Init most of the default value by allocating and zeroing */ | |
236 | ua_sess = zmalloc(sizeof(struct ust_app_session)); | |
237 | if (ua_sess == NULL) { | |
238 | PERROR("malloc"); | |
239 | goto error; | |
240 | } | |
241 | ||
242 | ua_sess->handle = -1; | |
bec39940 | 243 | ua_sess->channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
8b366481 DG |
244 | |
245 | return ua_sess; | |
246 | ||
247 | error: | |
248 | return NULL; | |
249 | } | |
250 | ||
251 | /* | |
252 | * Alloc new UST app channel. | |
253 | */ | |
254 | static | |
255 | struct ust_app_channel *alloc_ust_app_channel(char *name, | |
256 | struct lttng_ust_channel *attr) | |
257 | { | |
258 | struct ust_app_channel *ua_chan; | |
259 | ||
260 | /* Init most of the default value by allocating and zeroing */ | |
261 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); | |
262 | if (ua_chan == NULL) { | |
263 | PERROR("malloc"); | |
264 | goto error; | |
265 | } | |
266 | ||
267 | /* Setup channel name */ | |
268 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
269 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
270 | ||
271 | ua_chan->enabled = 1; | |
272 | ua_chan->handle = -1; | |
bec39940 DG |
273 | ua_chan->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
274 | ua_chan->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); | |
275 | lttng_ht_node_init_str(&ua_chan->node, ua_chan->name); | |
8b366481 DG |
276 | |
277 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); | |
278 | ||
279 | /* Copy attributes */ | |
280 | if (attr) { | |
281 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
282 | } | |
283 | ||
284 | DBG3("UST app channel %s allocated", ua_chan->name); | |
285 | ||
286 | return ua_chan; | |
287 | ||
288 | error: | |
289 | return NULL; | |
290 | } | |
291 | ||
292 | /* | |
293 | * Alloc new UST app event. | |
294 | */ | |
295 | static | |
296 | struct ust_app_event *alloc_ust_app_event(char *name, | |
297 | struct lttng_ust_event *attr) | |
298 | { | |
299 | struct ust_app_event *ua_event; | |
300 | ||
301 | /* Init most of the default value by allocating and zeroing */ | |
302 | ua_event = zmalloc(sizeof(struct ust_app_event)); | |
303 | if (ua_event == NULL) { | |
304 | PERROR("malloc"); | |
305 | goto error; | |
306 | } | |
307 | ||
308 | ua_event->enabled = 1; | |
309 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
310 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
bec39940 DG |
311 | ua_event->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
312 | lttng_ht_node_init_str(&ua_event->node, ua_event->name); | |
8b366481 DG |
313 | |
314 | /* Copy attributes */ | |
315 | if (attr) { | |
316 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
317 | } | |
318 | ||
319 | DBG3("UST app event %s allocated", ua_event->name); | |
320 | ||
321 | return ua_event; | |
322 | ||
323 | error: | |
324 | return NULL; | |
325 | } | |
326 | ||
327 | /* | |
328 | * Alloc new UST app context. | |
329 | */ | |
330 | static | |
331 | struct ust_app_ctx *alloc_ust_app_ctx(struct lttng_ust_context *uctx) | |
332 | { | |
333 | struct ust_app_ctx *ua_ctx; | |
334 | ||
335 | ua_ctx = zmalloc(sizeof(struct ust_app_ctx)); | |
336 | if (ua_ctx == NULL) { | |
337 | goto error; | |
338 | } | |
339 | ||
340 | if (uctx) { | |
341 | memcpy(&ua_ctx->ctx, uctx, sizeof(ua_ctx->ctx)); | |
342 | } | |
343 | ||
344 | DBG3("UST app context %d allocated", ua_ctx->ctx.ctx); | |
345 | ||
346 | error: | |
347 | return ua_ctx; | |
348 | } | |
349 | ||
099e26bd | 350 | /* |
421cb601 DG |
351 | * Find an ust_app using the sock and return it. RCU read side lock must be |
352 | * held before calling this helper function. | |
099e26bd | 353 | */ |
8b366481 DG |
354 | static |
355 | struct ust_app *find_app_by_sock(int sock) | |
099e26bd | 356 | { |
bec39940 | 357 | struct lttng_ht_node_ulong *node; |
f6a9efaa | 358 | struct ust_app_key *key; |
bec39940 | 359 | struct lttng_ht_iter iter; |
f6a9efaa | 360 | |
bec39940 DG |
361 | lttng_ht_lookup(ust_app_sock_key_map, (void *)((unsigned long) sock), |
362 | &iter); | |
363 | node = lttng_ht_iter_get_node_ulong(&iter); | |
f6a9efaa DG |
364 | if (node == NULL) { |
365 | DBG2("UST app find by sock %d key not found", sock); | |
f6a9efaa DG |
366 | goto error; |
367 | } | |
f6a9efaa DG |
368 | key = caa_container_of(node, struct ust_app_key, node); |
369 | ||
bec39940 DG |
370 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) key->pid), &iter); |
371 | node = lttng_ht_iter_get_node_ulong(&iter); | |
f6a9efaa DG |
372 | if (node == NULL) { |
373 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
374 | goto error; |
375 | } | |
f6a9efaa DG |
376 | return caa_container_of(node, struct ust_app, node); |
377 | ||
378 | error: | |
379 | return NULL; | |
099e26bd DG |
380 | } |
381 | ||
55cc08a6 DG |
382 | /* |
383 | * Create the channel context on the tracer. | |
384 | */ | |
385 | static | |
386 | int create_ust_channel_context(struct ust_app_channel *ua_chan, | |
387 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
388 | { | |
389 | int ret; | |
390 | ||
391 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
392 | ua_chan->obj, &ua_ctx->obj); | |
393 | if (ret < 0) { | |
394 | goto error; | |
395 | } | |
396 | ||
397 | ua_ctx->handle = ua_ctx->obj->handle; | |
398 | ||
727d5404 | 399 | DBG2("UST app context created successfully for channel %s", ua_chan->name); |
55cc08a6 DG |
400 | |
401 | error: | |
402 | return ret; | |
403 | } | |
404 | ||
405 | /* | |
406 | * Create the event context on the tracer. | |
407 | */ | |
408 | static | |
409 | int create_ust_event_context(struct ust_app_event *ua_event, | |
410 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
411 | { | |
412 | int ret; | |
413 | ||
414 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
415 | ua_event->obj, &ua_ctx->obj); | |
416 | if (ret < 0) { | |
417 | goto error; | |
418 | } | |
419 | ||
420 | ua_ctx->handle = ua_ctx->obj->handle; | |
421 | ||
727d5404 | 422 | DBG2("UST app context created successfully for event %s", ua_event->name); |
55cc08a6 DG |
423 | |
424 | error: | |
425 | return ret; | |
426 | } | |
427 | ||
9730260e DG |
428 | /* |
429 | * Disable the specified event on to UST tracer for the UST session. | |
430 | */ | |
431 | static int disable_ust_event(struct ust_app *app, | |
432 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
433 | { | |
434 | int ret; | |
435 | ||
436 | ret = ustctl_disable(app->key.sock, ua_event->obj); | |
437 | if (ret < 0) { | |
438 | ERR("UST app event %s disable failed for app (pid: %d) " | |
439 | "and session handle %d with ret %d", | |
440 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
441 | goto error; | |
442 | } | |
443 | ||
444 | DBG2("UST app event %s disabled successfully for app (pid: %d)", | |
445 | ua_event->attr.name, app->key.pid); | |
446 | ||
447 | error: | |
448 | return ret; | |
449 | } | |
450 | ||
78f0bacd DG |
451 | /* |
452 | * Disable the specified channel on to UST tracer for the UST session. | |
453 | */ | |
454 | static int disable_ust_channel(struct ust_app *app, | |
455 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
456 | { | |
457 | int ret; | |
458 | ||
459 | ret = ustctl_disable(app->key.sock, ua_chan->obj); | |
460 | if (ret < 0) { | |
461 | ERR("UST app channel %s disable failed for app (pid: %d) " | |
462 | "and session handle %d with ret %d", | |
463 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
464 | goto error; | |
465 | } | |
466 | ||
78f0bacd DG |
467 | DBG2("UST app channel %s disabled successfully for app (pid: %d)", |
468 | ua_chan->name, app->key.pid); | |
469 | ||
470 | error: | |
471 | return ret; | |
472 | } | |
473 | ||
474 | /* | |
475 | * Enable the specified channel on to UST tracer for the UST session. | |
476 | */ | |
477 | static int enable_ust_channel(struct ust_app *app, | |
478 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
479 | { | |
480 | int ret; | |
481 | ||
482 | ret = ustctl_enable(app->key.sock, ua_chan->obj); | |
483 | if (ret < 0) { | |
484 | ERR("UST app channel %s enable failed for app (pid: %d) " | |
485 | "and session handle %d with ret %d", | |
486 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
487 | goto error; | |
488 | } | |
489 | ||
490 | ua_chan->enabled = 1; | |
491 | ||
492 | DBG2("UST app channel %s enabled successfully for app (pid: %d)", | |
493 | ua_chan->name, app->key.pid); | |
494 | ||
495 | error: | |
496 | return ret; | |
497 | } | |
498 | ||
edb67388 DG |
499 | /* |
500 | * Enable the specified event on to UST tracer for the UST session. | |
501 | */ | |
502 | static int enable_ust_event(struct ust_app *app, | |
503 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
504 | { | |
505 | int ret; | |
506 | ||
507 | ret = ustctl_enable(app->key.sock, ua_event->obj); | |
508 | if (ret < 0) { | |
509 | ERR("UST app event %s enable failed for app (pid: %d) " | |
510 | "and session handle %d with ret %d", | |
511 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
512 | goto error; | |
513 | } | |
514 | ||
515 | DBG2("UST app event %s enabled successfully for app (pid: %d)", | |
516 | ua_event->attr.name, app->key.pid); | |
517 | ||
518 | error: | |
519 | return ret; | |
520 | } | |
521 | ||
099e26bd | 522 | /* |
5b4a0ec0 | 523 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 524 | */ |
5b4a0ec0 DG |
525 | static int open_ust_metadata(struct ust_app *app, |
526 | struct ust_app_session *ua_sess) | |
0177d773 | 527 | { |
5b4a0ec0 DG |
528 | int ret; |
529 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 530 | |
5b4a0ec0 DG |
531 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
532 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
533 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
534 | uattr.switch_timer_interval = | |
535 | ua_sess->metadata->attr.switch_timer_interval; | |
536 | uattr.read_timer_interval = | |
537 | ua_sess->metadata->attr.read_timer_interval; | |
538 | uattr.output = ua_sess->metadata->attr.output; | |
539 | ||
540 | /* UST tracer metadata creation */ | |
541 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
542 | &ua_sess->metadata->obj); | |
543 | if (ret < 0) { | |
fc34caaa DG |
544 | ERR("UST app open metadata failed for app pid:%d with ret %d", |
545 | app->key.pid, ret); | |
f6a9efaa | 546 | goto error; |
0177d773 | 547 | } |
f6a9efaa | 548 | |
6d3686da DG |
549 | ua_sess->metadata->handle = ua_sess->metadata->obj->handle; |
550 | ||
f6a9efaa | 551 | error: |
5b4a0ec0 | 552 | return ret; |
91d76f53 DG |
553 | } |
554 | ||
555 | /* | |
5b4a0ec0 | 556 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 557 | */ |
5b4a0ec0 DG |
558 | static int create_ust_stream(struct ust_app *app, |
559 | struct ust_app_session *ua_sess) | |
91d76f53 | 560 | { |
5b4a0ec0 | 561 | int ret; |
421cb601 | 562 | |
5b4a0ec0 DG |
563 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, |
564 | &ua_sess->metadata->stream_obj); | |
565 | if (ret < 0) { | |
566 | ERR("UST create metadata stream failed"); | |
421cb601 | 567 | goto error; |
91d76f53 | 568 | } |
421cb601 | 569 | |
421cb601 | 570 | error: |
5b4a0ec0 | 571 | return ret; |
91d76f53 DG |
572 | } |
573 | ||
b551a063 | 574 | /* |
5b4a0ec0 | 575 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 576 | */ |
5b4a0ec0 DG |
577 | static int create_ust_channel(struct ust_app *app, |
578 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 579 | { |
5b4a0ec0 | 580 | int ret; |
b551a063 | 581 | |
5b4a0ec0 DG |
582 | /* TODO: remove cast and use lttng-ust-abi.h */ |
583 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
584 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); | |
585 | if (ret < 0) { | |
58f3ca76 | 586 | ERR("Creating channel %s for app (pid: %d, sock: %d) " |
5b4a0ec0 DG |
587 | "and session handle %d with ret %d", |
588 | ua_chan->name, app->key.pid, app->key.sock, | |
589 | ua_sess->handle, ret); | |
b551a063 DG |
590 | goto error; |
591 | } | |
592 | ||
5b4a0ec0 | 593 | ua_chan->handle = ua_chan->obj->handle; |
b551a063 | 594 | |
5b4a0ec0 DG |
595 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
596 | ua_chan->name, app->key.pid, app->key.sock); | |
b551a063 | 597 | |
8535a6d9 DG |
598 | /* If channel is not enabled, disable it on the tracer */ |
599 | if (!ua_chan->enabled) { | |
600 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
601 | if (ret < 0) { | |
602 | goto error; | |
603 | } | |
604 | } | |
605 | ||
b551a063 DG |
606 | error: |
607 | return ret; | |
608 | } | |
609 | ||
91d76f53 | 610 | /* |
5b4a0ec0 | 611 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 612 | */ |
edb67388 DG |
613 | static |
614 | int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess, | |
615 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event) | |
91d76f53 | 616 | { |
5b4a0ec0 | 617 | int ret = 0; |
284d8f55 | 618 | |
5b4a0ec0 DG |
619 | /* Create UST event on tracer */ |
620 | ret = ustctl_create_event(app->key.sock, &ua_event->attr, ua_chan->obj, | |
621 | &ua_event->obj); | |
622 | if (ret < 0) { | |
fc34caaa DG |
623 | if (ret == -EEXIST) { |
624 | ret = 0; | |
625 | goto error; | |
626 | } | |
5b4a0ec0 DG |
627 | ERR("Error ustctl create event %s for app pid: %d with ret %d", |
628 | ua_event->attr.name, app->key.pid, ret); | |
629 | goto error; | |
91d76f53 | 630 | } |
f6a9efaa | 631 | |
5b4a0ec0 | 632 | ua_event->handle = ua_event->obj->handle; |
284d8f55 | 633 | |
5b4a0ec0 DG |
634 | DBG2("UST app event %s created successfully for pid:%d", |
635 | ua_event->attr.name, app->key.pid); | |
f6a9efaa | 636 | |
8535a6d9 | 637 | /* If event not enabled, disable it on the tracer */ |
fc34caaa | 638 | if (ua_event->enabled == 0) { |
8535a6d9 DG |
639 | ret = disable_ust_event(app, ua_sess, ua_event); |
640 | if (ret < 0) { | |
fc34caaa DG |
641 | /* |
642 | * If we hit an EPERM, something is wrong with our disable call. If | |
643 | * we get an EEXIST, there is a problem on the tracer side since we | |
644 | * just created it. | |
645 | */ | |
646 | switch (ret) { | |
647 | case -EPERM: | |
648 | /* Code flow problem */ | |
649 | assert(0); | |
650 | case -EEXIST: | |
651 | /* It's OK for our use case. */ | |
652 | ret = 0; | |
653 | break; | |
654 | default: | |
655 | break; | |
656 | } | |
8535a6d9 DG |
657 | goto error; |
658 | } | |
659 | } | |
660 | ||
5b4a0ec0 DG |
661 | error: |
662 | return ret; | |
91d76f53 | 663 | } |
48842b30 | 664 | |
5b4a0ec0 DG |
665 | /* |
666 | * Copy data between an UST app event and a LTT event. | |
667 | */ | |
421cb601 | 668 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
669 | struct ltt_ust_event *uevent) |
670 | { | |
bec39940 | 671 | struct lttng_ht_iter iter; |
55cc08a6 DG |
672 | struct ltt_ust_context *uctx; |
673 | struct ust_app_ctx *ua_ctx; | |
674 | ||
48842b30 DG |
675 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); |
676 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
677 | ||
fc34caaa DG |
678 | ua_event->enabled = uevent->enabled; |
679 | ||
5b4a0ec0 DG |
680 | /* Copy event attributes */ |
681 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
682 | ||
bec39940 | 683 | cds_lfht_for_each_entry(uevent->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
684 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
685 | if (ua_ctx == NULL) { | |
fc34caaa DG |
686 | /* malloc() failed. We should simply stop */ |
687 | return; | |
55cc08a6 | 688 | } |
fc34caaa | 689 | |
bec39940 DG |
690 | lttng_ht_node_init_ulong(&ua_ctx->node, |
691 | (unsigned long) ua_ctx->ctx.ctx); | |
692 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 | 693 | } |
48842b30 DG |
694 | } |
695 | ||
5b4a0ec0 DG |
696 | /* |
697 | * Copy data between an UST app channel and a LTT channel. | |
698 | */ | |
421cb601 | 699 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
700 | struct ltt_ust_channel *uchan) |
701 | { | |
bec39940 DG |
702 | struct lttng_ht_iter iter; |
703 | struct lttng_ht_node_str *ua_event_node; | |
48842b30 | 704 | struct ltt_ust_event *uevent; |
55cc08a6 | 705 | struct ltt_ust_context *uctx; |
48842b30 | 706 | struct ust_app_event *ua_event; |
55cc08a6 | 707 | struct ust_app_ctx *ua_ctx; |
48842b30 | 708 | |
fc34caaa | 709 | DBG2("UST app shadow copy of channel %s started", ua_chan->name); |
48842b30 DG |
710 | |
711 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
712 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
713 | /* Copy event attributes */ |
714 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 | 715 | |
fc34caaa DG |
716 | ua_chan->enabled = uchan->enabled; |
717 | ||
bec39940 | 718 | cds_lfht_for_each_entry(uchan->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
719 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
720 | if (ua_ctx == NULL) { | |
721 | continue; | |
722 | } | |
bec39940 DG |
723 | lttng_ht_node_init_ulong(&ua_ctx->node, |
724 | (unsigned long) ua_ctx->ctx.ctx); | |
725 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 | 726 | } |
48842b30 | 727 | |
421cb601 | 728 | /* Copy all events from ltt ust channel to ust app channel */ |
bec39940 DG |
729 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
730 | struct lttng_ht_iter uiter; | |
ba767faf | 731 | |
bec39940 DG |
732 | lttng_ht_lookup(ua_chan->events, (void *) uevent->attr.name, &uiter); |
733 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
48842b30 | 734 | if (ua_event_node == NULL) { |
421cb601 | 735 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 736 | uevent->attr.name); |
284d8f55 | 737 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 738 | if (ua_event == NULL) { |
5b4a0ec0 | 739 | continue; |
48842b30 | 740 | } |
421cb601 | 741 | shadow_copy_event(ua_event, uevent); |
bec39940 | 742 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
48842b30 | 743 | } |
48842b30 DG |
744 | } |
745 | ||
fc34caaa | 746 | DBG3("UST app shadow copy of channel %s done", ua_chan->name); |
48842b30 DG |
747 | } |
748 | ||
5b4a0ec0 DG |
749 | /* |
750 | * Copy data between a UST app session and a regular LTT session. | |
751 | */ | |
421cb601 | 752 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
bec39940 | 753 | struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 | 754 | { |
bec39940 DG |
755 | struct lttng_ht_node_str *ua_chan_node; |
756 | struct lttng_ht_iter iter; | |
48842b30 DG |
757 | struct ltt_ust_channel *uchan; |
758 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
759 | time_t rawtime; |
760 | struct tm *timeinfo; | |
761 | char datetime[16]; | |
762 | int ret; | |
763 | ||
764 | /* Get date and time for unique app path */ | |
765 | time(&rawtime); | |
766 | timeinfo = localtime(&rawtime); | |
767 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 768 | |
421cb601 | 769 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 | 770 | |
a991f516 | 771 | ua_sess->id = usess->id; |
6df2e2c9 MD |
772 | ua_sess->uid = usess->uid; |
773 | ua_sess->gid = usess->gid; | |
48842b30 | 774 | |
fc34caaa DG |
775 | ret = snprintf(ua_sess->path, PATH_MAX, "%s/%s-%d-%s", usess->pathname, |
776 | app->name, app->key.pid, datetime); | |
477d7741 MD |
777 | if (ret < 0) { |
778 | PERROR("asprintf UST shadow copy session"); | |
779 | /* TODO: We cannot return an error from here.. */ | |
780 | assert(0); | |
781 | } | |
782 | ||
48842b30 DG |
783 | /* TODO: support all UST domain */ |
784 | ||
785 | /* Iterate over all channels in global domain. */ | |
bec39940 DG |
786 | cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter, |
787 | uchan, node.node) { | |
788 | struct lttng_ht_iter uiter; | |
ba767faf | 789 | |
bec39940 DG |
790 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
791 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
5b4a0ec0 | 792 | if (ua_chan_node != NULL) { |
fc34caaa | 793 | /* Session exist. Contiuing. */ |
5b4a0ec0 DG |
794 | continue; |
795 | } | |
421cb601 | 796 | |
5b4a0ec0 DG |
797 | DBG2("Channel %s not found on shadow session copy, creating it", |
798 | uchan->name); | |
799 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
800 | if (ua_chan == NULL) { | |
fc34caaa | 801 | /* malloc failed FIXME: Might want to do handle ENOMEM .. */ |
5b4a0ec0 | 802 | continue; |
48842b30 DG |
803 | } |
804 | ||
5b4a0ec0 | 805 | shadow_copy_channel(ua_chan, uchan); |
bec39940 | 806 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
48842b30 DG |
807 | } |
808 | } | |
809 | ||
78f0bacd DG |
810 | /* |
811 | * Lookup sesison wrapper. | |
812 | */ | |
84cd17c6 MD |
813 | static |
814 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
bec39940 | 815 | struct ust_app *app, struct lttng_ht_iter *iter) |
84cd17c6 MD |
816 | { |
817 | /* Get right UST app session from app */ | |
2c348c10 | 818 | lttng_ht_lookup(app->sessions, (void *)((unsigned long) usess->id), iter); |
84cd17c6 MD |
819 | } |
820 | ||
421cb601 DG |
821 | /* |
822 | * Return ust app session from the app session hashtable using the UST session | |
a991f516 | 823 | * id. |
421cb601 | 824 | */ |
48842b30 DG |
825 | static struct ust_app_session *lookup_session_by_app( |
826 | struct ltt_ust_session *usess, struct ust_app *app) | |
827 | { | |
bec39940 DG |
828 | struct lttng_ht_iter iter; |
829 | struct lttng_ht_node_ulong *node; | |
48842b30 | 830 | |
84cd17c6 | 831 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 832 | node = lttng_ht_iter_get_node_ulong(&iter); |
48842b30 DG |
833 | if (node == NULL) { |
834 | goto error; | |
835 | } | |
836 | ||
837 | return caa_container_of(node, struct ust_app_session, node); | |
838 | ||
839 | error: | |
840 | return NULL; | |
841 | } | |
842 | ||
421cb601 DG |
843 | /* |
844 | * Create a UST session onto the tracer of app and add it the session | |
845 | * hashtable. | |
846 | * | |
847 | * Return ust app session or NULL on error. | |
848 | */ | |
849 | static struct ust_app_session *create_ust_app_session( | |
850 | struct ltt_ust_session *usess, struct ust_app *app) | |
851 | { | |
852 | int ret; | |
853 | struct ust_app_session *ua_sess; | |
854 | ||
855 | ua_sess = lookup_session_by_app(usess, app); | |
856 | if (ua_sess == NULL) { | |
a991f516 MD |
857 | DBG2("UST app pid: %d session id %d not found, creating it", |
858 | app->key.pid, usess->id); | |
421cb601 DG |
859 | ua_sess = alloc_ust_app_session(); |
860 | if (ua_sess == NULL) { | |
861 | /* Only malloc can failed so something is really wrong */ | |
fc34caaa | 862 | goto end; |
421cb601 | 863 | } |
477d7741 | 864 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
865 | } |
866 | ||
867 | if (ua_sess->handle == -1) { | |
868 | ret = ustctl_create_session(app->key.sock); | |
869 | if (ret < 0) { | |
fc34caaa | 870 | ERR("Creating session for app pid %d", app->key.pid); |
915d047c DG |
871 | /* This means that the tracer is gone... */ |
872 | ua_sess = (void*) -1UL; | |
421cb601 DG |
873 | goto error; |
874 | } | |
875 | ||
421cb601 DG |
876 | ua_sess->handle = ret; |
877 | ||
878 | /* Add ust app session to app's HT */ | |
2c348c10 | 879 | lttng_ht_node_init_ulong(&ua_sess->node, (unsigned long) ua_sess->id); |
bec39940 | 880 | lttng_ht_add_unique_ulong(app->sessions, &ua_sess->node); |
421cb601 DG |
881 | |
882 | DBG2("UST app session created successfully with handle %d", ret); | |
883 | } | |
884 | ||
fc34caaa | 885 | end: |
421cb601 DG |
886 | return ua_sess; |
887 | ||
888 | error: | |
fc34caaa | 889 | delete_ust_app_session(-1, ua_sess); |
421cb601 DG |
890 | return NULL; |
891 | } | |
892 | ||
55cc08a6 DG |
893 | /* |
894 | * Create a context for the channel on the tracer. | |
895 | */ | |
896 | static | |
897 | int create_ust_app_channel_context(struct ust_app_session *ua_sess, | |
898 | struct ust_app_channel *ua_chan, struct lttng_ust_context *uctx, | |
899 | struct ust_app *app) | |
900 | { | |
901 | int ret = 0; | |
bec39940 DG |
902 | struct lttng_ht_iter iter; |
903 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
904 | struct ust_app_ctx *ua_ctx; |
905 | ||
906 | DBG2("UST app adding context to channel %s", ua_chan->name); | |
907 | ||
bec39940 DG |
908 | lttng_ht_lookup(ua_chan->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
909 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
910 | if (node != NULL) { |
911 | ret = -EEXIST; | |
912 | goto error; | |
913 | } | |
914 | ||
915 | ua_ctx = alloc_ust_app_ctx(uctx); | |
916 | if (ua_ctx == NULL) { | |
917 | /* malloc failed */ | |
918 | ret = -1; | |
919 | goto error; | |
920 | } | |
921 | ||
bec39940 DG |
922 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
923 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 DG |
924 | |
925 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
926 | if (ret < 0) { | |
927 | goto error; | |
928 | } | |
929 | ||
930 | error: | |
931 | return ret; | |
932 | } | |
933 | ||
934 | /* | |
935 | * Create an UST context and enable it for the event on the tracer. | |
936 | */ | |
937 | static | |
938 | int create_ust_app_event_context(struct ust_app_session *ua_sess, | |
939 | struct ust_app_event *ua_event, struct lttng_ust_context *uctx, | |
940 | struct ust_app *app) | |
941 | { | |
942 | int ret = 0; | |
bec39940 DG |
943 | struct lttng_ht_iter iter; |
944 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
945 | struct ust_app_ctx *ua_ctx; |
946 | ||
947 | DBG2("UST app adding context to event %s", ua_event->name); | |
948 | ||
bec39940 DG |
949 | lttng_ht_lookup(ua_event->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
950 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
951 | if (node != NULL) { |
952 | ret = -EEXIST; | |
953 | goto error; | |
954 | } | |
955 | ||
956 | ua_ctx = alloc_ust_app_ctx(uctx); | |
957 | if (ua_ctx == NULL) { | |
958 | /* malloc failed */ | |
959 | ret = -1; | |
960 | goto error; | |
961 | } | |
962 | ||
bec39940 DG |
963 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
964 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 DG |
965 | |
966 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
967 | if (ret < 0) { | |
968 | goto error; | |
969 | } | |
970 | ||
971 | error: | |
972 | return ret; | |
973 | } | |
974 | ||
edb67388 DG |
975 | /* |
976 | * Enable on the tracer side a ust app event for the session and channel. | |
977 | */ | |
978 | static | |
979 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 980 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
981 | { |
982 | int ret; | |
983 | ||
984 | ret = enable_ust_event(app, ua_sess, ua_event); | |
985 | if (ret < 0) { | |
986 | goto error; | |
987 | } | |
988 | ||
989 | ua_event->enabled = 1; | |
990 | ||
991 | error: | |
992 | return ret; | |
993 | } | |
994 | ||
9730260e DG |
995 | /* |
996 | * Disable on the tracer side a ust app event for the session and channel. | |
997 | */ | |
998 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
7f79d3a1 | 999 | struct ust_app_event *ua_event, struct ust_app *app) |
9730260e DG |
1000 | { |
1001 | int ret; | |
1002 | ||
1003 | ret = disable_ust_event(app, ua_sess, ua_event); | |
1004 | if (ret < 0) { | |
1005 | goto error; | |
1006 | } | |
1007 | ||
1008 | ua_event->enabled = 0; | |
1009 | ||
1010 | error: | |
1011 | return ret; | |
1012 | } | |
1013 | ||
78f0bacd DG |
1014 | /* |
1015 | * Lookup ust app channel for session and disable it on the tracer side. | |
1016 | */ | |
8535a6d9 DG |
1017 | static |
1018 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
1019 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 1020 | { |
8535a6d9 | 1021 | int ret; |
78f0bacd DG |
1022 | |
1023 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
1024 | if (ret < 0) { | |
1025 | goto error; | |
1026 | } | |
1027 | ||
8535a6d9 DG |
1028 | ua_chan->enabled = 0; |
1029 | ||
78f0bacd DG |
1030 | error: |
1031 | return ret; | |
1032 | } | |
1033 | ||
1034 | /* | |
1035 | * Lookup ust app channel for session and enable it on the tracer side. | |
1036 | */ | |
1037 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
1038 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
1039 | { | |
1040 | int ret = 0; | |
bec39940 DG |
1041 | struct lttng_ht_iter iter; |
1042 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1043 | struct ust_app_channel *ua_chan; |
1044 | ||
bec39940 DG |
1045 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1046 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
78f0bacd | 1047 | if (ua_chan_node == NULL) { |
a991f516 MD |
1048 | DBG2("Unable to find channel %s in ust session id %u", |
1049 | uchan->name, ua_sess->id); | |
78f0bacd DG |
1050 | goto error; |
1051 | } | |
1052 | ||
1053 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1054 | ||
1055 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
1056 | if (ret < 0) { | |
1057 | goto error; | |
1058 | } | |
1059 | ||
1060 | error: | |
1061 | return ret; | |
1062 | } | |
1063 | ||
284d8f55 | 1064 | /* |
5b4a0ec0 | 1065 | * Create UST app channel and create it on the tracer. |
284d8f55 | 1066 | */ |
5b4a0ec0 DG |
1067 | static struct ust_app_channel *create_ust_app_channel( |
1068 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
1069 | struct ust_app *app) | |
1070 | { | |
1071 | int ret = 0; | |
bec39940 DG |
1072 | struct lttng_ht_iter iter; |
1073 | struct lttng_ht_node_str *ua_chan_node; | |
5b4a0ec0 DG |
1074 | struct ust_app_channel *ua_chan; |
1075 | ||
1076 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1077 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1078 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
fc34caaa | 1079 | if (ua_chan_node != NULL) { |
5b4a0ec0 | 1080 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
fc34caaa | 1081 | goto end; |
5b4a0ec0 DG |
1082 | } |
1083 | ||
fc34caaa DG |
1084 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); |
1085 | if (ua_chan == NULL) { | |
1086 | /* Only malloc can fail here */ | |
1087 | goto error; | |
1088 | } | |
1089 | shadow_copy_channel(ua_chan, uchan); | |
1090 | ||
5b4a0ec0 DG |
1091 | ret = create_ust_channel(app, ua_sess, ua_chan); |
1092 | if (ret < 0) { | |
fc34caaa DG |
1093 | /* Not found previously means that it does not exist on the tracer */ |
1094 | assert(ret != -EEXIST); | |
5b4a0ec0 DG |
1095 | goto error; |
1096 | } | |
1097 | ||
58f3ca76 DG |
1098 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
1099 | ||
fc34caaa DG |
1100 | DBG2("UST app create channel %s for PID %d completed", ua_chan->name, |
1101 | app->key.pid); | |
1102 | ||
1103 | end: | |
5b4a0ec0 DG |
1104 | return ua_chan; |
1105 | ||
1106 | error: | |
fc34caaa | 1107 | delete_ust_app_channel(-1, ua_chan); |
5b4a0ec0 DG |
1108 | return NULL; |
1109 | } | |
1110 | ||
1111 | /* | |
1112 | * Create UST app event and create it on the tracer side. | |
1113 | */ | |
edb67388 DG |
1114 | static |
1115 | int create_ust_app_event(struct ust_app_session *ua_sess, | |
1116 | struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent, | |
1117 | struct ust_app *app) | |
284d8f55 | 1118 | { |
edb67388 | 1119 | int ret = 0; |
bec39940 DG |
1120 | struct lttng_ht_iter iter; |
1121 | struct lttng_ht_node_str *ua_event_node; | |
5b4a0ec0 | 1122 | struct ust_app_event *ua_event; |
284d8f55 | 1123 | |
5b4a0ec0 | 1124 | /* Get event node */ |
bec39940 DG |
1125 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
1126 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
edb67388 | 1127 | if (ua_event_node != NULL) { |
fc34caaa | 1128 | ret = -EEXIST; |
edb67388 DG |
1129 | goto end; |
1130 | } | |
5b4a0ec0 | 1131 | |
edb67388 DG |
1132 | /* Does not exist so create one */ |
1133 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
1134 | if (ua_event == NULL) { | |
1135 | /* Only malloc can failed so something is really wrong */ | |
1136 | ret = -ENOMEM; | |
fc34caaa | 1137 | goto end; |
5b4a0ec0 | 1138 | } |
edb67388 | 1139 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 1140 | |
edb67388 | 1141 | /* Create it on the tracer side */ |
5b4a0ec0 | 1142 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 1143 | if (ret < 0) { |
fc34caaa DG |
1144 | /* Not found previously means that it does not exist on the tracer */ |
1145 | assert(ret != -EEXIST); | |
284d8f55 DG |
1146 | goto error; |
1147 | } | |
1148 | ||
bec39940 | 1149 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
284d8f55 | 1150 | |
fc34caaa DG |
1151 | DBG2("UST app create event %s for PID %d completed", ua_event->name, |
1152 | app->key.pid); | |
7f79d3a1 | 1153 | |
edb67388 | 1154 | end: |
fc34caaa DG |
1155 | return ret; |
1156 | ||
5b4a0ec0 | 1157 | error: |
fc34caaa DG |
1158 | /* Valid. Calling here is already in a read side lock */ |
1159 | delete_ust_app_event(-1, ua_event); | |
edb67388 | 1160 | return ret; |
5b4a0ec0 DG |
1161 | } |
1162 | ||
1163 | /* | |
1164 | * Create UST metadata and open it on the tracer side. | |
1165 | */ | |
1166 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
1167 | char *pathname, struct ust_app *app) | |
1168 | { | |
1169 | int ret = 0; | |
1170 | ||
1171 | if (ua_sess->metadata == NULL) { | |
1172 | /* Allocate UST metadata */ | |
1173 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
1174 | if (ua_sess->metadata == NULL) { | |
fc34caaa | 1175 | /* malloc() failed */ |
5b4a0ec0 DG |
1176 | goto error; |
1177 | } | |
1178 | ||
1179 | ret = open_ust_metadata(app, ua_sess); | |
1180 | if (ret < 0) { | |
7db205b5 DG |
1181 | DBG3("Opening metadata failed. Cleaning up memory"); |
1182 | ||
fc34caaa DG |
1183 | /* Cleanup failed metadata struct */ |
1184 | free(ua_sess->metadata); | |
7db205b5 DG |
1185 | /* |
1186 | * This is very important because delete_ust_app_session check if | |
1187 | * the pointer is null or not in order to delete the metadata. | |
1188 | */ | |
1189 | ua_sess->metadata = NULL; | |
5b4a0ec0 DG |
1190 | goto error; |
1191 | } | |
1192 | ||
1193 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
1194 | } | |
1195 | ||
1196 | /* Open UST metadata stream */ | |
1197 | if (ua_sess->metadata->stream_obj == NULL) { | |
1198 | ret = create_ust_stream(app, ua_sess); | |
1199 | if (ret < 0) { | |
1200 | goto error; | |
1201 | } | |
1202 | ||
e11d277b | 1203 | ret = run_as_mkdir(ua_sess->path, S_IRWXU | S_IRWXG, |
67f747d8 | 1204 | ua_sess->uid, ua_sess->gid); |
5b4a0ec0 DG |
1205 | if (ret < 0) { |
1206 | PERROR("mkdir UST metadata"); | |
1207 | goto error; | |
1208 | } | |
1209 | ||
477d7741 MD |
1210 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
1211 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
1212 | if (ret < 0) { |
1213 | PERROR("asprintf UST create stream"); | |
1214 | goto error; | |
1215 | } | |
1216 | ||
1217 | DBG2("UST metadata stream object created for app pid %d", | |
1218 | app->key.pid); | |
1219 | } else { | |
1220 | ERR("Attempting to create stream without metadata opened"); | |
1221 | goto error; | |
1222 | } | |
1223 | ||
1224 | return 0; | |
1225 | ||
1226 | error: | |
1227 | return -1; | |
1228 | } | |
1229 | ||
1230 | /* | |
1231 | * Return pointer to traceable apps list. | |
1232 | */ | |
bec39940 | 1233 | struct lttng_ht *ust_app_get_ht(void) |
5b4a0ec0 DG |
1234 | { |
1235 | return ust_app_ht; | |
1236 | } | |
1237 | ||
1238 | /* | |
1239 | * Return ust app pointer or NULL if not found. | |
1240 | */ | |
1241 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
1242 | { | |
bec39940 DG |
1243 | struct lttng_ht_node_ulong *node; |
1244 | struct lttng_ht_iter iter; | |
5b4a0ec0 DG |
1245 | |
1246 | rcu_read_lock(); | |
bec39940 DG |
1247 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) pid), &iter); |
1248 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1249 | if (node == NULL) { |
1250 | DBG2("UST app no found with pid %d", pid); | |
1251 | goto error; | |
1252 | } | |
1253 | rcu_read_unlock(); | |
1254 | ||
1255 | DBG2("Found UST app by pid %d", pid); | |
1256 | ||
1257 | return caa_container_of(node, struct ust_app, node); | |
1258 | ||
1259 | error: | |
1260 | rcu_read_unlock(); | |
1261 | return NULL; | |
1262 | } | |
1263 | ||
1264 | /* | |
1265 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
1266 | * add it to the global traceable app list. | |
1267 | * | |
0df502fd MD |
1268 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
1269 | * bitness is not supported. | |
5b4a0ec0 DG |
1270 | */ |
1271 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
1272 | { | |
1273 | struct ust_app *lta; | |
799e2c4f | 1274 | int ret; |
5b4a0ec0 | 1275 | |
7753dea8 MD |
1276 | if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL) |
1277 | || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) { | |
f943b0fb | 1278 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1279 | "%d-bit long, but no consumerd for this long size is available.\n", |
1280 | msg->name, msg->pid, msg->bits_per_long); | |
799e2c4f MD |
1281 | ret = close(sock); |
1282 | if (ret) { | |
1283 | PERROR("close"); | |
1284 | } | |
0df502fd MD |
1285 | return -EINVAL; |
1286 | } | |
3f2c5fcc MD |
1287 | if (msg->major != LTTNG_UST_COMM_MAJOR) { |
1288 | ERR("Registration failed: application \"%s\" (pid: %d) has " | |
1289 | "communication protocol version %u.%u, but sessiond supports 2.x.\n", | |
1290 | msg->name, msg->pid, msg->major, msg->minor); | |
799e2c4f MD |
1291 | ret = close(sock); |
1292 | if (ret) { | |
1293 | PERROR("close"); | |
1294 | } | |
3f2c5fcc MD |
1295 | return -EINVAL; |
1296 | } | |
5b4a0ec0 DG |
1297 | lta = zmalloc(sizeof(struct ust_app)); |
1298 | if (lta == NULL) { | |
1299 | PERROR("malloc"); | |
1300 | return -ENOMEM; | |
1301 | } | |
1302 | ||
1303 | lta->ppid = msg->ppid; | |
1304 | lta->uid = msg->uid; | |
1305 | lta->gid = msg->gid; | |
e0c7ec2b | 1306 | lta->compatible = 0; /* Not compatible until proven */ |
7753dea8 | 1307 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1308 | lta->v_major = msg->major; |
1309 | lta->v_minor = msg->minor; | |
1310 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1311 | lta->name[16] = '\0'; | |
bec39940 | 1312 | lta->sessions = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
5b4a0ec0 DG |
1313 | |
1314 | /* Set key map */ | |
1315 | lta->key.pid = msg->pid; | |
bec39940 | 1316 | lttng_ht_node_init_ulong(<a->node, (unsigned long)lta->key.pid); |
5b4a0ec0 | 1317 | lta->key.sock = sock; |
bec39940 | 1318 | lttng_ht_node_init_ulong(<a->key.node, (unsigned long)lta->key.sock); |
5b4a0ec0 DG |
1319 | |
1320 | rcu_read_lock(); | |
bec39940 DG |
1321 | lttng_ht_add_unique_ulong(ust_app_sock_key_map, <a->key.node); |
1322 | lttng_ht_add_unique_ulong(ust_app_ht, <a->node); | |
5b4a0ec0 DG |
1323 | rcu_read_unlock(); |
1324 | ||
1325 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
1326 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, | |
1327 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
1328 | ||
1329 | return 0; | |
1330 | } | |
1331 | ||
1332 | /* | |
1333 | * Unregister app by removing it from the global traceable app list and freeing | |
1334 | * the data struct. | |
1335 | * | |
1336 | * The socket is already closed at this point so no close to sock. | |
1337 | */ | |
1338 | void ust_app_unregister(int sock) | |
1339 | { | |
1340 | struct ust_app *lta; | |
bec39940 DG |
1341 | struct lttng_ht_node_ulong *node; |
1342 | struct lttng_ht_iter iter; | |
525b0740 | 1343 | int ret; |
5b4a0ec0 DG |
1344 | |
1345 | rcu_read_lock(); | |
1346 | lta = find_app_by_sock(sock); | |
1347 | if (lta == NULL) { | |
1348 | ERR("Unregister app sock %d not found!", sock); | |
1349 | goto error; | |
1350 | } | |
1351 | ||
1352 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
1353 | ||
886459c6 MD |
1354 | /* Remove application from socket hash table */ |
1355 | lttng_ht_lookup(ust_app_sock_key_map, (void *)((unsigned long) sock), &iter); | |
1356 | ret = lttng_ht_del(ust_app_sock_key_map, &iter); | |
1357 | assert(!ret); | |
1358 | ||
5b4a0ec0 | 1359 | /* Get the node reference for a call_rcu */ |
bec39940 DG |
1360 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) lta->key.pid), &iter); |
1361 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1362 | if (node == NULL) { |
1363 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
1364 | goto error; | |
1365 | } | |
284d8f55 | 1366 | |
886459c6 | 1367 | /* Remove application from PID hash table */ |
bec39940 | 1368 | ret = lttng_ht_del(ust_app_ht, &iter); |
525b0740 | 1369 | assert(!ret); |
5b4a0ec0 | 1370 | call_rcu(&node->head, delete_ust_app_rcu); |
284d8f55 | 1371 | error: |
5b4a0ec0 DG |
1372 | rcu_read_unlock(); |
1373 | return; | |
284d8f55 DG |
1374 | } |
1375 | ||
1376 | /* | |
5b4a0ec0 | 1377 | * Return traceable_app_count |
284d8f55 | 1378 | */ |
5b4a0ec0 | 1379 | unsigned long ust_app_list_count(void) |
284d8f55 | 1380 | { |
5b4a0ec0 | 1381 | unsigned long count; |
284d8f55 | 1382 | |
5b4a0ec0 | 1383 | rcu_read_lock(); |
bec39940 | 1384 | count = lttng_ht_get_count(ust_app_ht); |
5b4a0ec0 | 1385 | rcu_read_unlock(); |
284d8f55 | 1386 | |
5b4a0ec0 | 1387 | return count; |
284d8f55 DG |
1388 | } |
1389 | ||
5b4a0ec0 DG |
1390 | /* |
1391 | * Fill events array with all events name of all registered apps. | |
1392 | */ | |
1393 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1394 | { |
5b4a0ec0 DG |
1395 | int ret, handle; |
1396 | size_t nbmem, count = 0; | |
bec39940 | 1397 | struct lttng_ht_iter iter; |
5b4a0ec0 DG |
1398 | struct ust_app *app; |
1399 | struct lttng_event *tmp; | |
421cb601 | 1400 | |
5b4a0ec0 DG |
1401 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1402 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1403 | if (tmp == NULL) { | |
1404 | PERROR("zmalloc ust app events"); | |
1405 | ret = -ENOMEM; | |
421cb601 DG |
1406 | goto error; |
1407 | } | |
1408 | ||
5b4a0ec0 | 1409 | rcu_read_lock(); |
421cb601 | 1410 | |
bec39940 | 1411 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
90eaa0d2 | 1412 | struct lttng_ust_tracepoint_iter uiter; |
ac3bd9c0 | 1413 | |
e0c7ec2b DG |
1414 | if (!app->compatible) { |
1415 | /* | |
1416 | * TODO: In time, we should notice the caller of this error by | |
1417 | * telling him that this is a version error. | |
1418 | */ | |
1419 | continue; | |
1420 | } | |
5b4a0ec0 DG |
1421 | handle = ustctl_tracepoint_list(app->key.sock); |
1422 | if (handle < 0) { | |
1423 | ERR("UST app list events getting handle failed for app pid %d", | |
1424 | app->key.pid); | |
1425 | continue; | |
1426 | } | |
421cb601 | 1427 | |
5b4a0ec0 | 1428 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, |
90eaa0d2 | 1429 | &uiter)) != -ENOENT) { |
815564d8 MD |
1430 | if (count >= nbmem) { |
1431 | DBG2("Reallocating event list from %zu to %zu entries", nbmem, | |
1432 | 2 * nbmem); | |
1433 | nbmem *= 2; | |
2f221590 | 1434 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event)); |
5b4a0ec0 DG |
1435 | if (tmp == NULL) { |
1436 | PERROR("realloc ust app events"); | |
1437 | ret = -ENOMEM; | |
1438 | goto rcu_error; | |
1439 | } | |
1440 | } | |
90eaa0d2 | 1441 | memcpy(tmp[count].name, uiter.name, LTTNG_UST_SYM_NAME_LEN); |
8005f29a | 1442 | tmp[count].loglevel = uiter.loglevel; |
69892bbb | 1443 | tmp[count].type = LTTNG_UST_TRACEPOINT; |
5b4a0ec0 DG |
1444 | tmp[count].pid = app->key.pid; |
1445 | tmp[count].enabled = -1; | |
1446 | count++; | |
421cb601 | 1447 | } |
421cb601 DG |
1448 | } |
1449 | ||
5b4a0ec0 DG |
1450 | ret = count; |
1451 | *events = tmp; | |
421cb601 | 1452 | |
5b4a0ec0 | 1453 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1454 | |
5b4a0ec0 DG |
1455 | rcu_error: |
1456 | rcu_read_unlock(); | |
421cb601 | 1457 | error: |
5b4a0ec0 | 1458 | return ret; |
421cb601 DG |
1459 | } |
1460 | ||
5b4a0ec0 DG |
1461 | /* |
1462 | * Free and clean all traceable apps of the global list. | |
1463 | */ | |
1464 | void ust_app_clean_list(void) | |
421cb601 | 1465 | { |
5b4a0ec0 | 1466 | int ret; |
bec39940 DG |
1467 | struct lttng_ht_iter iter; |
1468 | struct lttng_ht_node_ulong *node; | |
421cb601 | 1469 | |
5b4a0ec0 | 1470 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1471 | |
5b4a0ec0 | 1472 | rcu_read_lock(); |
421cb601 | 1473 | |
bec39940 DG |
1474 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, node, node) { |
1475 | ret = lttng_ht_del(ust_app_ht, &iter); | |
525b0740 | 1476 | assert(!ret); |
bec39940 | 1477 | call_rcu(&node->head, delete_ust_app_rcu); |
421cb601 | 1478 | } |
bec39940 DG |
1479 | /* Destroy is done only when the ht is empty */ |
1480 | lttng_ht_destroy(ust_app_ht); | |
421cb601 | 1481 | |
bec39940 DG |
1482 | cds_lfht_for_each_entry(ust_app_sock_key_map->ht, &iter.iter, node, node) { |
1483 | ret = lttng_ht_del(ust_app_sock_key_map, &iter); | |
1484 | assert(!ret); | |
1485 | } | |
1486 | /* Destroy is done only when the ht is empty */ | |
1487 | lttng_ht_destroy(ust_app_sock_key_map); | |
421cb601 | 1488 | |
5b4a0ec0 DG |
1489 | rcu_read_unlock(); |
1490 | } | |
1491 | ||
1492 | /* | |
1493 | * Init UST app hash table. | |
1494 | */ | |
1495 | void ust_app_ht_alloc(void) | |
1496 | { | |
bec39940 DG |
1497 | ust_app_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1498 | ust_app_sock_key_map = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
421cb601 DG |
1499 | } |
1500 | ||
78f0bacd DG |
1501 | /* |
1502 | * For a specific UST session, disable the channel for all registered apps. | |
1503 | */ | |
35a9059d | 1504 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1505 | struct ltt_ust_channel *uchan) |
1506 | { | |
1507 | int ret = 0; | |
bec39940 DG |
1508 | struct lttng_ht_iter iter; |
1509 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1510 | struct ust_app *app; |
1511 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1512 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1513 | |
1514 | if (usess == NULL || uchan == NULL) { | |
1515 | ERR("Disabling UST global channel with NULL values"); | |
1516 | ret = -1; | |
1517 | goto error; | |
1518 | } | |
1519 | ||
a991f516 MD |
1520 | DBG2("UST app disabling channel %s from global domain for session id %d", |
1521 | uchan->name, usess->id); | |
78f0bacd DG |
1522 | |
1523 | rcu_read_lock(); | |
1524 | ||
1525 | /* For every registered applications */ | |
bec39940 DG |
1526 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
1527 | struct lttng_ht_iter uiter; | |
e0c7ec2b DG |
1528 | if (!app->compatible) { |
1529 | /* | |
1530 | * TODO: In time, we should notice the caller of this error by | |
1531 | * telling him that this is a version error. | |
1532 | */ | |
1533 | continue; | |
1534 | } | |
78f0bacd DG |
1535 | ua_sess = lookup_session_by_app(usess, app); |
1536 | if (ua_sess == NULL) { | |
1537 | continue; | |
1538 | } | |
1539 | ||
8535a6d9 | 1540 | /* Get channel */ |
bec39940 DG |
1541 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1542 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
8535a6d9 DG |
1543 | /* If the session if found for the app, the channel must be there */ |
1544 | assert(ua_chan_node); | |
1545 | ||
1546 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1547 | /* The channel must not be already disabled */ | |
1548 | assert(ua_chan->enabled == 1); | |
1549 | ||
1550 | /* Disable channel onto application */ | |
1551 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1552 | if (ret < 0) { |
1553 | /* XXX: We might want to report this error at some point... */ | |
1554 | continue; | |
1555 | } | |
1556 | } | |
1557 | ||
1558 | rcu_read_unlock(); | |
1559 | ||
1560 | error: | |
1561 | return ret; | |
1562 | } | |
1563 | ||
1564 | /* | |
1565 | * For a specific UST session, enable the channel for all registered apps. | |
1566 | */ | |
35a9059d | 1567 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1568 | struct ltt_ust_channel *uchan) |
1569 | { | |
1570 | int ret = 0; | |
bec39940 | 1571 | struct lttng_ht_iter iter; |
78f0bacd DG |
1572 | struct ust_app *app; |
1573 | struct ust_app_session *ua_sess; | |
1574 | ||
1575 | if (usess == NULL || uchan == NULL) { | |
1576 | ERR("Adding UST global channel to NULL values"); | |
1577 | ret = -1; | |
1578 | goto error; | |
1579 | } | |
1580 | ||
a991f516 MD |
1581 | DBG2("UST app enabling channel %s to global domain for session id %d", |
1582 | uchan->name, usess->id); | |
78f0bacd DG |
1583 | |
1584 | rcu_read_lock(); | |
1585 | ||
1586 | /* For every registered applications */ | |
bec39940 | 1587 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
e0c7ec2b DG |
1588 | if (!app->compatible) { |
1589 | /* | |
1590 | * TODO: In time, we should notice the caller of this error by | |
1591 | * telling him that this is a version error. | |
1592 | */ | |
1593 | continue; | |
1594 | } | |
78f0bacd DG |
1595 | ua_sess = lookup_session_by_app(usess, app); |
1596 | if (ua_sess == NULL) { | |
1597 | continue; | |
1598 | } | |
1599 | ||
1600 | /* Enable channel onto application */ | |
1601 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1602 | if (ret < 0) { | |
1603 | /* XXX: We might want to report this error at some point... */ | |
1604 | continue; | |
1605 | } | |
1606 | } | |
1607 | ||
1608 | rcu_read_unlock(); | |
1609 | ||
1610 | error: | |
1611 | return ret; | |
1612 | } | |
1613 | ||
b0a40d28 DG |
1614 | /* |
1615 | * Disable an event in a channel and for a specific session. | |
1616 | */ | |
35a9059d DG |
1617 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
1618 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
1619 | { |
1620 | int ret = 0; | |
bec39940 DG |
1621 | struct lttng_ht_iter iter, uiter; |
1622 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
b0a40d28 DG |
1623 | struct ust_app *app; |
1624 | struct ust_app_session *ua_sess; | |
1625 | struct ust_app_channel *ua_chan; | |
1626 | struct ust_app_event *ua_event; | |
1627 | ||
1628 | DBG("UST app disabling event %s for all apps in channel " | |
a991f516 | 1629 | "%s for session id %d", uevent->attr.name, uchan->name, usess->id); |
b0a40d28 DG |
1630 | |
1631 | rcu_read_lock(); | |
1632 | ||
1633 | /* For all registered applications */ | |
bec39940 | 1634 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
e0c7ec2b DG |
1635 | if (!app->compatible) { |
1636 | /* | |
1637 | * TODO: In time, we should notice the caller of this error by | |
1638 | * telling him that this is a version error. | |
1639 | */ | |
1640 | continue; | |
1641 | } | |
b0a40d28 DG |
1642 | ua_sess = lookup_session_by_app(usess, app); |
1643 | if (ua_sess == NULL) { | |
1644 | /* Next app */ | |
1645 | continue; | |
1646 | } | |
1647 | ||
1648 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1649 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1650 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 | 1651 | if (ua_chan_node == NULL) { |
a991f516 MD |
1652 | DBG2("Channel %s not found in session id %d for app pid %d." |
1653 | "Skipping", uchan->name, usess->id, app->key.pid); | |
b0a40d28 DG |
1654 | continue; |
1655 | } | |
1656 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1657 | ||
bec39940 DG |
1658 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
1659 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 DG |
1660 | if (ua_event_node == NULL) { |
1661 | DBG2("Event %s not found in channel %s for app pid %d." | |
35a9059d | 1662 | "Skipping", uevent->attr.name, uchan->name, app->key.pid); |
b0a40d28 DG |
1663 | continue; |
1664 | } | |
1665 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1666 | ||
7f79d3a1 | 1667 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
b0a40d28 DG |
1668 | if (ret < 0) { |
1669 | /* XXX: Report error someday... */ | |
1670 | continue; | |
1671 | } | |
1672 | } | |
1673 | ||
1674 | rcu_read_unlock(); | |
1675 | ||
1676 | return ret; | |
1677 | } | |
1678 | ||
9730260e | 1679 | /* |
edb67388 | 1680 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
1681 | * registered apps. |
1682 | */ | |
35a9059d | 1683 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
1684 | struct ltt_ust_channel *uchan) |
1685 | { | |
1686 | int ret = 0; | |
bec39940 DG |
1687 | struct lttng_ht_iter iter, uiter; |
1688 | struct lttng_ht_node_str *ua_chan_node; | |
9730260e DG |
1689 | struct ust_app *app; |
1690 | struct ust_app_session *ua_sess; | |
1691 | struct ust_app_channel *ua_chan; | |
1692 | struct ust_app_event *ua_event; | |
1693 | ||
1694 | DBG("UST app disabling all event for all apps in channel " | |
a991f516 | 1695 | "%s for session id %d", uchan->name, usess->id); |
9730260e DG |
1696 | |
1697 | rcu_read_lock(); | |
1698 | ||
1699 | /* For all registered applications */ | |
bec39940 | 1700 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
e0c7ec2b DG |
1701 | if (!app->compatible) { |
1702 | /* | |
1703 | * TODO: In time, we should notice the caller of this error by | |
1704 | * telling him that this is a version error. | |
1705 | */ | |
1706 | continue; | |
1707 | } | |
9730260e | 1708 | ua_sess = lookup_session_by_app(usess, app); |
edb67388 DG |
1709 | /* If ua_sess is NULL, there is a code flow error */ |
1710 | assert(ua_sess); | |
9730260e DG |
1711 | |
1712 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1713 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1714 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1715 | /* If the channel is not found, there is a code flow error */ |
1716 | assert(ua_chan_node); | |
1717 | ||
9730260e DG |
1718 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1719 | ||
1720 | /* Disable each events of channel */ | |
bec39940 DG |
1721 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
1722 | node.node) { | |
7f79d3a1 | 1723 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
9730260e DG |
1724 | if (ret < 0) { |
1725 | /* XXX: Report error someday... */ | |
1726 | continue; | |
1727 | } | |
1728 | } | |
1729 | } | |
1730 | ||
1731 | rcu_read_unlock(); | |
1732 | ||
1733 | return ret; | |
1734 | } | |
1735 | ||
421cb601 | 1736 | /* |
5b4a0ec0 | 1737 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1738 | */ |
35a9059d | 1739 | int ust_app_create_channel_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1740 | struct ltt_ust_channel *uchan) |
1741 | { | |
bec39940 | 1742 | struct lttng_ht_iter iter; |
48842b30 DG |
1743 | struct ust_app *app; |
1744 | struct ust_app_session *ua_sess; | |
1745 | struct ust_app_channel *ua_chan; | |
1746 | ||
fc34caaa DG |
1747 | /* Very wrong code flow */ |
1748 | assert(usess); | |
1749 | assert(uchan); | |
421cb601 | 1750 | |
a991f516 MD |
1751 | DBG2("UST app adding channel %s to global domain for session id %d", |
1752 | uchan->name, usess->id); | |
48842b30 DG |
1753 | |
1754 | rcu_read_lock(); | |
421cb601 | 1755 | |
5b4a0ec0 | 1756 | /* For every registered applications */ |
bec39940 | 1757 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
e0c7ec2b DG |
1758 | if (!app->compatible) { |
1759 | /* | |
1760 | * TODO: In time, we should notice the caller of this error by | |
1761 | * telling him that this is a version error. | |
1762 | */ | |
1763 | continue; | |
1764 | } | |
edb67388 DG |
1765 | /* |
1766 | * Create session on the tracer side and add it to app session HT. Note | |
1767 | * that if session exist, it will simply return a pointer to the ust | |
1768 | * app session. | |
1769 | */ | |
421cb601 | 1770 | ua_sess = create_ust_app_session(usess, app); |
509cbaf8 | 1771 | if (ua_sess == NULL) { |
915d047c | 1772 | /* The malloc() failed. */ |
fc34caaa | 1773 | goto error; |
915d047c DG |
1774 | } else if (ua_sess == (void *) -1UL) { |
1775 | /* The application's socket is not valid. Contiuing */ | |
1776 | continue; | |
48842b30 DG |
1777 | } |
1778 | ||
421cb601 DG |
1779 | /* Create channel onto application */ |
1780 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1781 | if (ua_chan == NULL) { | |
fc34caaa DG |
1782 | /* Major problem here and it's maybe the tracer or malloc() */ |
1783 | goto error; | |
48842b30 | 1784 | } |
48842b30 | 1785 | } |
5b4a0ec0 | 1786 | |
48842b30 DG |
1787 | rcu_read_unlock(); |
1788 | ||
fc34caaa DG |
1789 | return 0; |
1790 | ||
421cb601 | 1791 | error: |
fc34caaa | 1792 | return -1; |
48842b30 DG |
1793 | } |
1794 | ||
5b4a0ec0 | 1795 | /* |
edb67388 | 1796 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 1797 | */ |
35a9059d | 1798 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1799 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1800 | { | |
1801 | int ret = 0; | |
bec39940 DG |
1802 | struct lttng_ht_iter iter, uiter; |
1803 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
48842b30 DG |
1804 | struct ust_app *app; |
1805 | struct ust_app_session *ua_sess; | |
1806 | struct ust_app_channel *ua_chan; | |
1807 | struct ust_app_event *ua_event; | |
48842b30 | 1808 | |
a991f516 MD |
1809 | DBG("UST app enabling event %s for all apps for session id %d", |
1810 | uevent->attr.name, usess->id); | |
48842b30 | 1811 | |
edb67388 DG |
1812 | /* |
1813 | * NOTE: At this point, this function is called only if the session and | |
1814 | * channel passed are already created for all apps. and enabled on the | |
1815 | * tracer also. | |
1816 | */ | |
1817 | ||
48842b30 | 1818 | rcu_read_lock(); |
421cb601 DG |
1819 | |
1820 | /* For all registered applications */ | |
bec39940 | 1821 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
e0c7ec2b DG |
1822 | if (!app->compatible) { |
1823 | /* | |
1824 | * TODO: In time, we should notice the caller of this error by | |
1825 | * telling him that this is a version error. | |
1826 | */ | |
1827 | continue; | |
1828 | } | |
edb67388 DG |
1829 | ua_sess = lookup_session_by_app(usess, app); |
1830 | /* If ua_sess is NULL, there is a code flow error */ | |
1831 | assert(ua_sess); | |
ba767faf | 1832 | |
edb67388 | 1833 | /* Lookup channel in the ust app session */ |
bec39940 DG |
1834 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1835 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1836 | /* If the channel is not found, there is a code flow error */ |
1837 | assert(ua_chan_node); | |
1838 | ||
1839 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1840 | ||
bec39940 DG |
1841 | lttng_ht_lookup(ua_chan->events, (void*)uevent->attr.name, &uiter); |
1842 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
35a9059d | 1843 | if (ua_event_node == NULL) { |
7f79d3a1 DG |
1844 | DBG3("UST app enable event %s not found for app PID %d." |
1845 | "Skipping app", uevent->attr.name, app->key.pid); | |
35a9059d DG |
1846 | continue; |
1847 | } | |
1848 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1849 | ||
1850 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
1851 | if (ret < 0) { | |
7f79d3a1 | 1852 | goto error; |
48842b30 | 1853 | } |
edb67388 DG |
1854 | } |
1855 | ||
7f79d3a1 | 1856 | error: |
edb67388 | 1857 | rcu_read_unlock(); |
edb67388 DG |
1858 | return ret; |
1859 | } | |
1860 | ||
1861 | /* | |
1862 | * For a specific existing UST session and UST channel, creates the event for | |
1863 | * all registered apps. | |
1864 | */ | |
35a9059d | 1865 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
1866 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1867 | { | |
1868 | int ret = 0; | |
bec39940 DG |
1869 | struct lttng_ht_iter iter, uiter; |
1870 | struct lttng_ht_node_str *ua_chan_node; | |
edb67388 DG |
1871 | struct ust_app *app; |
1872 | struct ust_app_session *ua_sess; | |
1873 | struct ust_app_channel *ua_chan; | |
1874 | ||
a991f516 MD |
1875 | DBG("UST app creating event %s for all apps for session id %d", |
1876 | uevent->attr.name, usess->id); | |
edb67388 | 1877 | |
edb67388 DG |
1878 | rcu_read_lock(); |
1879 | ||
1880 | /* For all registered applications */ | |
bec39940 | 1881 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
e0c7ec2b DG |
1882 | if (!app->compatible) { |
1883 | /* | |
1884 | * TODO: In time, we should notice the caller of this error by | |
1885 | * telling him that this is a version error. | |
1886 | */ | |
1887 | continue; | |
1888 | } | |
edb67388 DG |
1889 | ua_sess = lookup_session_by_app(usess, app); |
1890 | /* If ua_sess is NULL, there is a code flow error */ | |
1891 | assert(ua_sess); | |
48842b30 DG |
1892 | |
1893 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1894 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1895 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1896 | /* If the channel is not found, there is a code flow error */ |
1897 | assert(ua_chan_node); | |
1898 | ||
48842b30 DG |
1899 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1900 | ||
edb67388 DG |
1901 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1902 | if (ret < 0) { | |
fc34caaa DG |
1903 | if (ret != -EEXIST) { |
1904 | /* Possible value at this point: -ENOMEM. If so, we stop! */ | |
1905 | break; | |
1906 | } | |
1907 | DBG2("UST app event %s already exist on app PID %d", | |
1908 | uevent->attr.name, app->key.pid); | |
5b4a0ec0 | 1909 | continue; |
48842b30 | 1910 | } |
48842b30 | 1911 | } |
5b4a0ec0 | 1912 | |
48842b30 DG |
1913 | rcu_read_unlock(); |
1914 | ||
1915 | return ret; | |
1916 | } | |
1917 | ||
5b4a0ec0 DG |
1918 | /* |
1919 | * Start tracing for a specific UST session and app. | |
1920 | */ | |
421cb601 | 1921 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1922 | { |
1923 | int ret = 0; | |
bec39940 | 1924 | struct lttng_ht_iter iter; |
48842b30 DG |
1925 | struct ust_app_session *ua_sess; |
1926 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 1927 | struct ltt_ust_stream *ustream; |
7753dea8 | 1928 | int consumerd_fd; |
48842b30 | 1929 | |
421cb601 | 1930 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 1931 | |
509cbaf8 MD |
1932 | rcu_read_lock(); |
1933 | ||
e0c7ec2b DG |
1934 | if (!app->compatible) { |
1935 | goto end; | |
1936 | } | |
1937 | ||
421cb601 DG |
1938 | ua_sess = lookup_session_by_app(usess, app); |
1939 | if (ua_sess == NULL) { | |
509cbaf8 | 1940 | goto error_rcu_unlock; |
421cb601 | 1941 | } |
48842b30 | 1942 | |
aea829b3 DG |
1943 | /* Upon restart, we skip the setup, already done */ |
1944 | if (ua_sess->started) { | |
8be98f9a | 1945 | goto skip_setup; |
aea829b3 | 1946 | } |
8be98f9a | 1947 | |
f848c3eb DG |
1948 | /* Indicate that the session has been started once */ |
1949 | ua_sess->started = 1; | |
1950 | ||
421cb601 DG |
1951 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1952 | if (ret < 0) { | |
509cbaf8 | 1953 | goto error_rcu_unlock; |
421cb601 | 1954 | } |
48842b30 | 1955 | |
421cb601 | 1956 | /* For each channel */ |
bec39940 DG |
1957 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
1958 | node.node) { | |
421cb601 DG |
1959 | /* Create all streams */ |
1960 | while (1) { | |
5b4a0ec0 | 1961 | /* Create UST stream */ |
421cb601 DG |
1962 | ustream = zmalloc(sizeof(*ustream)); |
1963 | if (ustream == NULL) { | |
1964 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1965 | goto error_rcu_unlock; |
421cb601 | 1966 | } |
48842b30 | 1967 | |
421cb601 DG |
1968 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
1969 | &ustream->obj); | |
48842b30 | 1970 | if (ret < 0) { |
421cb601 DG |
1971 | /* Got all streams */ |
1972 | break; | |
48842b30 | 1973 | } |
421cb601 | 1974 | ustream->handle = ustream->obj->handle; |
48842b30 | 1975 | |
421cb601 DG |
1976 | /* Order is important */ |
1977 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
477d7741 MD |
1978 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", |
1979 | ua_sess->path, ua_chan->name, | |
1980 | ua_chan->streams.count++); | |
aba8e916 DG |
1981 | if (ret < 0) { |
1982 | PERROR("asprintf UST create stream"); | |
421cb601 | 1983 | continue; |
aba8e916 | 1984 | } |
421cb601 DG |
1985 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1986 | ustream->pathname); | |
1987 | } | |
421cb601 | 1988 | } |
aba8e916 | 1989 | |
7753dea8 MD |
1990 | switch (app->bits_per_long) { |
1991 | case 64: | |
1992 | consumerd_fd = ust_consumerd64_fd; | |
1993 | break; | |
1994 | case 32: | |
1995 | consumerd_fd = ust_consumerd32_fd; | |
1996 | break; | |
1997 | default: | |
1998 | ret = -EINVAL; | |
1999 | goto error_rcu_unlock; | |
2000 | } | |
aea829b3 | 2001 | |
421cb601 | 2002 | /* Setup UST consumer socket and send fds to it */ |
7753dea8 | 2003 | ret = ust_consumer_send_session(consumerd_fd, ua_sess); |
421cb601 | 2004 | if (ret < 0) { |
509cbaf8 | 2005 | goto error_rcu_unlock; |
421cb601 | 2006 | } |
48842b30 | 2007 | |
8be98f9a | 2008 | skip_setup: |
421cb601 DG |
2009 | /* This start the UST tracing */ |
2010 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
2011 | if (ret < 0) { | |
2012 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 2013 | goto error_rcu_unlock; |
421cb601 | 2014 | } |
5b4a0ec0 | 2015 | |
421cb601 DG |
2016 | /* Quiescent wait after starting trace */ |
2017 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 2018 | |
e0c7ec2b DG |
2019 | end: |
2020 | rcu_read_unlock(); | |
421cb601 | 2021 | return 0; |
48842b30 | 2022 | |
509cbaf8 MD |
2023 | error_rcu_unlock: |
2024 | rcu_read_unlock(); | |
421cb601 DG |
2025 | return -1; |
2026 | } | |
48842b30 | 2027 | |
8be98f9a MD |
2028 | /* |
2029 | * Stop tracing for a specific UST session and app. | |
2030 | */ | |
2031 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2032 | { | |
2033 | int ret = 0; | |
bec39940 | 2034 | struct lttng_ht_iter iter; |
8be98f9a | 2035 | struct ust_app_session *ua_sess; |
6d3686da | 2036 | struct ust_app_channel *ua_chan; |
8be98f9a MD |
2037 | |
2038 | DBG("Stopping tracing for ust app pid %d", app->key.pid); | |
2039 | ||
2040 | rcu_read_lock(); | |
2041 | ||
e0c7ec2b DG |
2042 | if (!app->compatible) { |
2043 | goto end; | |
2044 | } | |
2045 | ||
8be98f9a MD |
2046 | ua_sess = lookup_session_by_app(usess, app); |
2047 | if (ua_sess == NULL) { | |
2048 | /* Only malloc can failed so something is really wrong */ | |
2049 | goto error_rcu_unlock; | |
2050 | } | |
2051 | ||
9bc07046 DG |
2052 | /* |
2053 | * If started = 0, it means that stop trace has been called for a session | |
2054 | * that was never started. This is a code flow error and should never | |
2055 | * happen. | |
2056 | */ | |
2057 | assert(ua_sess->started == 1); | |
7db205b5 | 2058 | |
9d6c7d3f DG |
2059 | /* This inhibits UST tracing */ |
2060 | ret = ustctl_stop_session(app->key.sock, ua_sess->handle); | |
2061 | if (ret < 0) { | |
2062 | ERR("Error stopping tracing for app pid: %d", app->key.pid); | |
2063 | goto error_rcu_unlock; | |
2064 | } | |
2065 | ||
2066 | /* Quiescent wait after stopping trace */ | |
2067 | ustctl_wait_quiescent(app->key.sock); | |
2068 | ||
2069 | /* Flushing buffers */ | |
bec39940 DG |
2070 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2071 | node.node) { | |
6d3686da | 2072 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_chan->obj); |
8be98f9a | 2073 | if (ret < 0) { |
7db205b5 DG |
2074 | ERR("UST app PID %d channel %s flush failed with ret %d", |
2075 | app->key.pid, ua_chan->name, ret); | |
6d3686da DG |
2076 | /* Continuing flushing all buffers */ |
2077 | continue; | |
8be98f9a MD |
2078 | } |
2079 | } | |
8be98f9a | 2080 | |
90d97d10 DG |
2081 | /* Flush all buffers before stopping */ |
2082 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_sess->metadata->obj); | |
2083 | if (ret < 0) { | |
7db205b5 DG |
2084 | ERR("UST app PID %d metadata flush failed with ret %d", app->key.pid, |
2085 | ret); | |
90d97d10 DG |
2086 | } |
2087 | ||
7db205b5 DG |
2088 | end: |
2089 | rcu_read_unlock(); | |
8be98f9a MD |
2090 | return 0; |
2091 | ||
2092 | error_rcu_unlock: | |
2093 | rcu_read_unlock(); | |
2094 | return -1; | |
2095 | } | |
2096 | ||
84cd17c6 MD |
2097 | /* |
2098 | * Destroy a specific UST session in apps. | |
2099 | */ | |
2100 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2101 | { | |
2102 | struct ust_app_session *ua_sess; | |
2103 | struct lttng_ust_object_data obj; | |
bec39940 DG |
2104 | struct lttng_ht_iter iter; |
2105 | struct lttng_ht_node_ulong *node; | |
525b0740 | 2106 | int ret; |
84cd17c6 MD |
2107 | |
2108 | DBG("Destroy tracing for ust app pid %d", app->key.pid); | |
2109 | ||
2110 | rcu_read_lock(); | |
2111 | ||
e0c7ec2b DG |
2112 | if (!app->compatible) { |
2113 | goto end; | |
2114 | } | |
2115 | ||
84cd17c6 | 2116 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 2117 | node = lttng_ht_iter_get_node_ulong(&iter); |
84cd17c6 MD |
2118 | if (node == NULL) { |
2119 | /* Only malloc can failed so something is really wrong */ | |
2120 | goto error_rcu_unlock; | |
2121 | } | |
2122 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
bec39940 | 2123 | ret = lttng_ht_del(app->sessions, &iter); |
525b0740 | 2124 | assert(!ret); |
84cd17c6 MD |
2125 | obj.handle = ua_sess->handle; |
2126 | obj.shm_fd = -1; | |
2127 | obj.wait_fd = -1; | |
2128 | obj.memory_map_size = 0; | |
2129 | ustctl_release_object(app->key.sock, &obj); | |
2130 | ||
7db205b5 DG |
2131 | delete_ust_app_session(app->key.sock, ua_sess); |
2132 | ||
84cd17c6 MD |
2133 | /* Quiescent wait after stopping trace */ |
2134 | ustctl_wait_quiescent(app->key.sock); | |
2135 | ||
e0c7ec2b DG |
2136 | end: |
2137 | rcu_read_unlock(); | |
84cd17c6 MD |
2138 | return 0; |
2139 | ||
2140 | error_rcu_unlock: | |
2141 | rcu_read_unlock(); | |
2142 | return -1; | |
2143 | } | |
2144 | ||
5b4a0ec0 DG |
2145 | /* |
2146 | * Start tracing for the UST session. | |
2147 | */ | |
421cb601 DG |
2148 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
2149 | { | |
2150 | int ret = 0; | |
bec39940 | 2151 | struct lttng_ht_iter iter; |
421cb601 | 2152 | struct ust_app *app; |
48842b30 | 2153 | |
421cb601 DG |
2154 | DBG("Starting all UST traces"); |
2155 | ||
2156 | rcu_read_lock(); | |
421cb601 | 2157 | |
bec39940 | 2158 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
421cb601 | 2159 | ret = ust_app_start_trace(usess, app); |
48842b30 | 2160 | if (ret < 0) { |
5b4a0ec0 DG |
2161 | /* Continue to next apps even on error */ |
2162 | continue; | |
48842b30 | 2163 | } |
48842b30 | 2164 | } |
5b4a0ec0 | 2165 | |
48842b30 DG |
2166 | rcu_read_unlock(); |
2167 | ||
2168 | return 0; | |
2169 | } | |
487cf67c | 2170 | |
8be98f9a MD |
2171 | /* |
2172 | * Start tracing for the UST session. | |
2173 | */ | |
2174 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
2175 | { | |
2176 | int ret = 0; | |
bec39940 | 2177 | struct lttng_ht_iter iter; |
8be98f9a MD |
2178 | struct ust_app *app; |
2179 | ||
2180 | DBG("Stopping all UST traces"); | |
2181 | ||
2182 | rcu_read_lock(); | |
2183 | ||
bec39940 | 2184 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
8be98f9a MD |
2185 | ret = ust_app_stop_trace(usess, app); |
2186 | if (ret < 0) { | |
2187 | /* Continue to next apps even on error */ | |
2188 | continue; | |
2189 | } | |
2190 | } | |
2191 | ||
2192 | rcu_read_unlock(); | |
2193 | ||
2194 | return 0; | |
2195 | } | |
2196 | ||
84cd17c6 MD |
2197 | /* |
2198 | * Destroy app UST session. | |
2199 | */ | |
2200 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
2201 | { | |
2202 | int ret = 0; | |
bec39940 | 2203 | struct lttng_ht_iter iter; |
84cd17c6 MD |
2204 | struct ust_app *app; |
2205 | ||
2206 | DBG("Destroy all UST traces"); | |
2207 | ||
2208 | rcu_read_lock(); | |
2209 | ||
bec39940 | 2210 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
84cd17c6 MD |
2211 | ret = ust_app_destroy_trace(usess, app); |
2212 | if (ret < 0) { | |
2213 | /* Continue to next apps even on error */ | |
2214 | continue; | |
2215 | } | |
2216 | } | |
2217 | ||
2218 | rcu_read_unlock(); | |
2219 | ||
2220 | return 0; | |
2221 | } | |
2222 | ||
5b4a0ec0 DG |
2223 | /* |
2224 | * Add channels/events from UST global domain to registered apps at sock. | |
2225 | */ | |
487cf67c DG |
2226 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
2227 | { | |
55c54cce | 2228 | int ret = 0; |
727d5404 | 2229 | struct lttng_ht_iter iter, uiter, iter_ctx; |
487cf67c DG |
2230 | struct ust_app *app; |
2231 | struct ust_app_session *ua_sess; | |
2232 | struct ust_app_channel *ua_chan; | |
2233 | struct ust_app_event *ua_event; | |
727d5404 | 2234 | struct ust_app_ctx *ua_ctx; |
1f3580c7 DG |
2235 | |
2236 | if (usess == NULL) { | |
5b4a0ec0 | 2237 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
2238 | goto error; |
2239 | } | |
2240 | ||
a991f516 MD |
2241 | DBG2("UST app global update for app sock %d for session id %d", sock, |
2242 | usess->id); | |
487cf67c | 2243 | |
284d8f55 DG |
2244 | rcu_read_lock(); |
2245 | ||
487cf67c DG |
2246 | app = find_app_by_sock(sock); |
2247 | if (app == NULL) { | |
2248 | ERR("Failed to update app sock %d", sock); | |
2249 | goto error; | |
2250 | } | |
2251 | ||
e0c7ec2b DG |
2252 | if (!app->compatible) { |
2253 | goto error; | |
2254 | } | |
2255 | ||
421cb601 | 2256 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 2257 | if (ua_sess == NULL) { |
487cf67c DG |
2258 | goto error; |
2259 | } | |
2260 | ||
284d8f55 DG |
2261 | /* |
2262 | * We can iterate safely here over all UST app session sicne the create ust | |
2263 | * app session above made a shadow copy of the UST global domain from the | |
2264 | * ltt ust session. | |
2265 | */ | |
bec39940 DG |
2266 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2267 | node.node) { | |
284d8f55 DG |
2268 | ret = create_ust_channel(app, ua_sess, ua_chan); |
2269 | if (ret < 0) { | |
2270 | /* FIXME: Should we quit here or continue... */ | |
2271 | continue; | |
487cf67c DG |
2272 | } |
2273 | ||
727d5404 DG |
2274 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter_ctx.iter, ua_ctx, |
2275 | node.node) { | |
2276 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
2277 | if (ret < 0) { | |
2278 | /* FIXME: Should we quit here or continue... */ | |
2279 | continue; | |
2280 | } | |
2281 | } | |
2282 | ||
2283 | ||
284d8f55 | 2284 | /* For each events */ |
bec39940 DG |
2285 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
2286 | node.node) { | |
284d8f55 DG |
2287 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
2288 | if (ret < 0) { | |
2289 | /* FIXME: Should we quit here or continue... */ | |
2290 | continue; | |
487cf67c | 2291 | } |
727d5404 DG |
2292 | |
2293 | /* Add context on events. */ | |
2294 | cds_lfht_for_each_entry(ua_event->ctx->ht, &iter_ctx.iter, | |
2295 | ua_ctx, node.node) { | |
2296 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
2297 | if (ret < 0) { | |
2298 | /* FIXME: Should we quit here or continue... */ | |
2299 | continue; | |
2300 | } | |
2301 | } | |
36dc12cc | 2302 | } |
487cf67c DG |
2303 | } |
2304 | ||
36dc12cc | 2305 | if (usess->start_trace) { |
421cb601 | 2306 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 2307 | if (ret < 0) { |
36dc12cc DG |
2308 | goto error; |
2309 | } | |
2310 | ||
36dc12cc DG |
2311 | DBG2("UST trace started for app pid %d", app->key.pid); |
2312 | } | |
2313 | ||
487cf67c DG |
2314 | error: |
2315 | rcu_read_unlock(); | |
2316 | return; | |
2317 | } | |
55cc08a6 DG |
2318 | |
2319 | /* | |
2320 | * Add context to a specific channel for global UST domain. | |
2321 | */ | |
2322 | int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess, | |
2323 | struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx) | |
2324 | { | |
2325 | int ret = 0; | |
bec39940 DG |
2326 | struct lttng_ht_node_str *ua_chan_node; |
2327 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2328 | struct ust_app_channel *ua_chan = NULL; |
2329 | struct ust_app_session *ua_sess; | |
2330 | struct ust_app *app; | |
2331 | ||
2332 | rcu_read_lock(); | |
2333 | ||
bec39940 | 2334 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
e0c7ec2b DG |
2335 | if (!app->compatible) { |
2336 | /* | |
2337 | * TODO: In time, we should notice the caller of this error by | |
2338 | * telling him that this is a version error. | |
2339 | */ | |
2340 | continue; | |
2341 | } | |
55cc08a6 DG |
2342 | ua_sess = lookup_session_by_app(usess, app); |
2343 | if (ua_sess == NULL) { | |
2344 | continue; | |
2345 | } | |
2346 | ||
2347 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2348 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2349 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2350 | if (ua_chan_node == NULL) { |
2351 | continue; | |
2352 | } | |
2353 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2354 | node); | |
2355 | ||
2356 | ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app); | |
2357 | if (ret < 0) { | |
2358 | continue; | |
2359 | } | |
2360 | } | |
2361 | ||
55cc08a6 DG |
2362 | rcu_read_unlock(); |
2363 | return ret; | |
2364 | } | |
2365 | ||
2366 | /* | |
2367 | * Add context to a specific event in a channel for global UST domain. | |
2368 | */ | |
2369 | int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess, | |
2370 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
2371 | struct ltt_ust_context *uctx) | |
2372 | { | |
2373 | int ret = 0; | |
bec39940 DG |
2374 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; |
2375 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2376 | struct ust_app_session *ua_sess; |
2377 | struct ust_app_event *ua_event; | |
2378 | struct ust_app_channel *ua_chan = NULL; | |
2379 | struct ust_app *app; | |
2380 | ||
2381 | rcu_read_lock(); | |
2382 | ||
bec39940 | 2383 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
e0c7ec2b DG |
2384 | if (!app->compatible) { |
2385 | /* | |
2386 | * TODO: In time, we should notice the caller of this error by | |
2387 | * telling him that this is a version error. | |
2388 | */ | |
2389 | continue; | |
2390 | } | |
55cc08a6 DG |
2391 | ua_sess = lookup_session_by_app(usess, app); |
2392 | if (ua_sess == NULL) { | |
2393 | continue; | |
2394 | } | |
2395 | ||
2396 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2397 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2398 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2399 | if (ua_chan_node == NULL) { |
2400 | continue; | |
2401 | } | |
2402 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2403 | node); | |
2404 | ||
bec39940 DG |
2405 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
2406 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2407 | if (ua_event_node == NULL) { |
2408 | continue; | |
2409 | } | |
2410 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, | |
2411 | node); | |
2412 | ||
2413 | ret = create_ust_app_event_context(ua_sess, ua_event, &uctx->ctx, app); | |
2414 | if (ret < 0) { | |
2415 | continue; | |
2416 | } | |
2417 | } | |
2418 | ||
55cc08a6 DG |
2419 | rcu_read_unlock(); |
2420 | return ret; | |
2421 | } | |
76d45b40 DG |
2422 | |
2423 | /* | |
2424 | * Enable event for a channel from a UST session for a specific PID. | |
2425 | */ | |
2426 | int ust_app_enable_event_pid(struct ltt_ust_session *usess, | |
2427 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2428 | { | |
2429 | int ret = 0; | |
bec39940 DG |
2430 | struct lttng_ht_iter iter; |
2431 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
76d45b40 DG |
2432 | struct ust_app *app; |
2433 | struct ust_app_session *ua_sess; | |
2434 | struct ust_app_channel *ua_chan; | |
2435 | struct ust_app_event *ua_event; | |
2436 | ||
2437 | DBG("UST app enabling event %s for PID %d", uevent->attr.name, pid); | |
2438 | ||
2439 | rcu_read_lock(); | |
2440 | ||
2441 | app = ust_app_find_by_pid(pid); | |
2442 | if (app == NULL) { | |
2443 | ERR("UST app enable event per PID %d not found", pid); | |
2444 | ret = -1; | |
2445 | goto error; | |
2446 | } | |
2447 | ||
e0c7ec2b DG |
2448 | if (!app->compatible) { |
2449 | ret = 0; | |
2450 | goto error; | |
2451 | } | |
2452 | ||
76d45b40 DG |
2453 | ua_sess = lookup_session_by_app(usess, app); |
2454 | /* If ua_sess is NULL, there is a code flow error */ | |
2455 | assert(ua_sess); | |
2456 | ||
2457 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2458 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2459 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2460 | /* If the channel is not found, there is a code flow error */ |
2461 | assert(ua_chan_node); | |
2462 | ||
2463 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2464 | ||
bec39940 DG |
2465 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2466 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2467 | if (ua_event_node == NULL) { |
2468 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); | |
2469 | if (ret < 0) { | |
2470 | goto error; | |
2471 | } | |
2472 | } else { | |
2473 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2474 | ||
2475 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2476 | if (ret < 0) { | |
2477 | goto error; | |
2478 | } | |
2479 | } | |
2480 | ||
2481 | error: | |
2482 | rcu_read_unlock(); | |
2483 | return ret; | |
2484 | } | |
7f79d3a1 DG |
2485 | |
2486 | /* | |
2487 | * Disable event for a channel from a UST session for a specific PID. | |
2488 | */ | |
2489 | int ust_app_disable_event_pid(struct ltt_ust_session *usess, | |
2490 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2491 | { | |
2492 | int ret = 0; | |
bec39940 DG |
2493 | struct lttng_ht_iter iter; |
2494 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
7f79d3a1 DG |
2495 | struct ust_app *app; |
2496 | struct ust_app_session *ua_sess; | |
2497 | struct ust_app_channel *ua_chan; | |
2498 | struct ust_app_event *ua_event; | |
2499 | ||
2500 | DBG("UST app disabling event %s for PID %d", uevent->attr.name, pid); | |
2501 | ||
2502 | rcu_read_lock(); | |
2503 | ||
2504 | app = ust_app_find_by_pid(pid); | |
2505 | if (app == NULL) { | |
2506 | ERR("UST app disable event per PID %d not found", pid); | |
2507 | ret = -1; | |
2508 | goto error; | |
2509 | } | |
2510 | ||
e0c7ec2b DG |
2511 | if (!app->compatible) { |
2512 | ret = 0; | |
2513 | goto error; | |
2514 | } | |
2515 | ||
7f79d3a1 DG |
2516 | ua_sess = lookup_session_by_app(usess, app); |
2517 | /* If ua_sess is NULL, there is a code flow error */ | |
2518 | assert(ua_sess); | |
2519 | ||
2520 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2521 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2522 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2523 | if (ua_chan_node == NULL) { |
2524 | /* Channel does not exist, skip disabling */ | |
2525 | goto error; | |
2526 | } | |
2527 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2528 | ||
bec39940 DG |
2529 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2530 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2531 | if (ua_event_node == NULL) { |
2532 | /* Event does not exist, skip disabling */ | |
2533 | goto error; | |
2534 | } | |
2535 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2536 | ||
2537 | ret = disable_ust_app_event(ua_sess, ua_event, app); | |
2538 | if (ret < 0) { | |
2539 | goto error; | |
2540 | } | |
2541 | ||
2542 | error: | |
2543 | rcu_read_unlock(); | |
2544 | return ret; | |
2545 | } | |
e0c7ec2b DG |
2546 | |
2547 | /* | |
2548 | * Validate version of UST apps and set the compatible bit. | |
2549 | */ | |
2550 | int ust_app_validate_version(int sock) | |
2551 | { | |
2552 | int ret; | |
2553 | struct ust_app *app; | |
2554 | ||
2555 | rcu_read_lock(); | |
2556 | ||
2557 | app = find_app_by_sock(sock); | |
2558 | assert(app); | |
2559 | ||
2560 | ret = ustctl_tracer_version(sock, &app->version); | |
2561 | if (ret < 0) { | |
2562 | goto error; | |
2563 | } | |
2564 | ||
2565 | /* Validate version */ | |
2566 | if (app->version.major > UST_APP_MAJOR_VERSION) { | |
2567 | goto error; | |
2568 | } | |
2569 | ||
2570 | DBG2("UST app PID %d is compatible with major version %d " | |
2571 | "(supporting <= %d)", app->key.pid, app->version.major, | |
2572 | UST_APP_MAJOR_VERSION); | |
2573 | app->compatible = 1; | |
2574 | rcu_read_unlock(); | |
2575 | return 0; | |
2576 | ||
2577 | error: | |
2578 | DBG2("UST app PID %d is not compatible with major version %d " | |
2579 | "(supporting <= %d)", app->key.pid, app->version.major, | |
2580 | UST_APP_MAJOR_VERSION); | |
2581 | app->compatible = 0; | |
2582 | rcu_read_unlock(); | |
2583 | return -1; | |
2584 | } | |
4466912f DG |
2585 | |
2586 | /* | |
2587 | * Calibrate registered applications. | |
2588 | */ | |
2589 | int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate) | |
2590 | { | |
2591 | int ret = 0; | |
2592 | struct lttng_ht_iter iter; | |
2593 | struct ust_app *app; | |
2594 | ||
2595 | rcu_read_lock(); | |
2596 | ||
2597 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { | |
2598 | if (!app->compatible) { | |
2599 | /* | |
2600 | * TODO: In time, we should notice the caller of this error by | |
2601 | * telling him that this is a version error. | |
2602 | */ | |
2603 | continue; | |
2604 | } | |
2605 | ||
2606 | ret = ustctl_calibrate(app->key.sock, calibrate); | |
2607 | if (ret < 0) { | |
2608 | switch (ret) { | |
2609 | case -ENOSYS: | |
2610 | /* Means that it's not implemented on the tracer side. */ | |
2611 | ret = 0; | |
2612 | break; | |
2613 | default: | |
2614 | /* TODO: Report error to user */ | |
2615 | DBG2("Calibrate app PID %d returned with error %d", | |
2616 | app->key.pid, ret); | |
2617 | break; | |
2618 | } | |
2619 | } | |
2620 | } | |
2621 | ||
2622 | DBG("UST app global domain calibration finished"); | |
2623 | ||
2624 | rcu_read_unlock(); | |
2625 | ||
2626 | return ret; | |
2627 | } |