Commit | Line | Data |
---|---|---|
91d76f53 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
91d76f53 DG |
7 | * |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
d14d33bf AM |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
91d76f53 DG |
16 | */ |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <errno.h> | |
20 | #include <pthread.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
099e26bd | 23 | #include <string.h> |
aba8e916 DG |
24 | #include <sys/stat.h> |
25 | #include <sys/types.h> | |
099e26bd | 26 | #include <unistd.h> |
0df502fd | 27 | #include <urcu/compiler.h> |
bec39940 | 28 | |
990570ed | 29 | #include <common/common.h> |
1e307fab | 30 | |
56fff090 | 31 | #include "ust-app.h" |
48842b30 | 32 | #include "ust-consumer.h" |
d80a6244 | 33 | #include "ust-ctl.h" |
4063050c | 34 | #include "fd-limit.h" |
53a80697 | 35 | #include "../../common/sessiond-comm/sessiond-comm.h" |
d80a6244 | 36 | |
55cc08a6 DG |
37 | /* |
38 | * Delete ust context safely. RCU read lock must be held before calling | |
39 | * this function. | |
40 | */ | |
41 | static | |
42 | void delete_ust_app_ctx(int sock, struct ust_app_ctx *ua_ctx) | |
43 | { | |
44 | if (ua_ctx->obj) { | |
45 | ustctl_release_object(sock, ua_ctx->obj); | |
46 | free(ua_ctx->obj); | |
47 | } | |
48 | free(ua_ctx); | |
49 | } | |
50 | ||
d80a6244 DG |
51 | /* |
52 | * Delete ust app event safely. RCU read lock must be held before calling | |
53 | * this function. | |
54 | */ | |
8b366481 DG |
55 | static |
56 | void delete_ust_app_event(int sock, struct ust_app_event *ua_event) | |
d80a6244 | 57 | { |
55cc08a6 | 58 | int ret; |
bec39940 | 59 | struct lttng_ht_iter iter; |
55cc08a6 DG |
60 | struct ust_app_ctx *ua_ctx; |
61 | ||
fc34caaa | 62 | /* Destroy each context of event */ |
bec39940 DG |
63 | cds_lfht_for_each_entry(ua_event->ctx->ht, &iter.iter, ua_ctx, |
64 | node.node) { | |
65 | ret = lttng_ht_del(ua_event->ctx, &iter); | |
55cc08a6 DG |
66 | assert(!ret); |
67 | delete_ust_app_ctx(sock, ua_ctx); | |
68 | } | |
53a80697 | 69 | free(ua_event->filter); |
bec39940 | 70 | lttng_ht_destroy(ua_event->ctx); |
d80a6244 | 71 | |
edb67388 DG |
72 | if (ua_event->obj != NULL) { |
73 | ustctl_release_object(sock, ua_event->obj); | |
74 | free(ua_event->obj); | |
75 | } | |
d80a6244 DG |
76 | free(ua_event); |
77 | } | |
78 | ||
79 | /* | |
80 | * Delete ust app stream safely. RCU read lock must be held before calling | |
81 | * this function. | |
82 | */ | |
8b366481 DG |
83 | static |
84 | void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream) | |
d80a6244 | 85 | { |
8b366481 DG |
86 | if (stream->obj) { |
87 | ustctl_release_object(sock, stream->obj); | |
4063050c | 88 | lttng_fd_put(LTTNG_FD_APPS, 2); |
8b366481 DG |
89 | free(stream->obj); |
90 | } | |
84cd17c6 | 91 | free(stream); |
d80a6244 DG |
92 | } |
93 | ||
94 | /* | |
95 | * Delete ust app channel safely. RCU read lock must be held before calling | |
96 | * this function. | |
97 | */ | |
8b366481 DG |
98 | static |
99 | void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan) | |
d80a6244 DG |
100 | { |
101 | int ret; | |
bec39940 | 102 | struct lttng_ht_iter iter; |
d80a6244 | 103 | struct ust_app_event *ua_event; |
55cc08a6 | 104 | struct ust_app_ctx *ua_ctx; |
d80a6244 DG |
105 | struct ltt_ust_stream *stream, *stmp; |
106 | ||
55cc08a6 | 107 | /* Wipe stream */ |
d80a6244 | 108 | cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) { |
84cd17c6 | 109 | cds_list_del(&stream->list); |
d80a6244 DG |
110 | delete_ust_app_stream(sock, stream); |
111 | } | |
112 | ||
55cc08a6 | 113 | /* Wipe context */ |
bec39940 DG |
114 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter.iter, ua_ctx, node.node) { |
115 | ret = lttng_ht_del(ua_chan->ctx, &iter); | |
55cc08a6 DG |
116 | assert(!ret); |
117 | delete_ust_app_ctx(sock, ua_ctx); | |
118 | } | |
bec39940 | 119 | lttng_ht_destroy(ua_chan->ctx); |
d80a6244 | 120 | |
55cc08a6 | 121 | /* Wipe events */ |
bec39940 DG |
122 | cds_lfht_for_each_entry(ua_chan->events->ht, &iter.iter, ua_event, |
123 | node.node) { | |
124 | ret = lttng_ht_del(ua_chan->events, &iter); | |
525b0740 | 125 | assert(!ret); |
d80a6244 DG |
126 | delete_ust_app_event(sock, ua_event); |
127 | } | |
bec39940 | 128 | lttng_ht_destroy(ua_chan->events); |
edb67388 DG |
129 | |
130 | if (ua_chan->obj != NULL) { | |
131 | ustctl_release_object(sock, ua_chan->obj); | |
4063050c | 132 | lttng_fd_put(LTTNG_FD_APPS, 2); |
edb67388 DG |
133 | free(ua_chan->obj); |
134 | } | |
84cd17c6 | 135 | free(ua_chan); |
d80a6244 DG |
136 | } |
137 | ||
138 | /* | |
139 | * Delete ust app session safely. RCU read lock must be held before calling | |
140 | * this function. | |
141 | */ | |
8b366481 DG |
142 | static |
143 | void delete_ust_app_session(int sock, struct ust_app_session *ua_sess) | |
d80a6244 DG |
144 | { |
145 | int ret; | |
bec39940 | 146 | struct lttng_ht_iter iter; |
d80a6244 DG |
147 | struct ust_app_channel *ua_chan; |
148 | ||
149 | if (ua_sess->metadata) { | |
8b366481 DG |
150 | if (ua_sess->metadata->stream_obj) { |
151 | ustctl_release_object(sock, ua_sess->metadata->stream_obj); | |
4063050c | 152 | lttng_fd_put(LTTNG_FD_APPS, 2); |
8b366481 DG |
153 | free(ua_sess->metadata->stream_obj); |
154 | } | |
155 | if (ua_sess->metadata->obj) { | |
156 | ustctl_release_object(sock, ua_sess->metadata->obj); | |
4063050c | 157 | lttng_fd_put(LTTNG_FD_APPS, 2); |
8b366481 DG |
158 | free(ua_sess->metadata->obj); |
159 | } | |
a2c0da86 | 160 | trace_ust_destroy_metadata(ua_sess->metadata); |
d80a6244 DG |
161 | } |
162 | ||
bec39940 DG |
163 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
164 | node.node) { | |
165 | ret = lttng_ht_del(ua_sess->channels, &iter); | |
525b0740 | 166 | assert(!ret); |
d80a6244 DG |
167 | delete_ust_app_channel(sock, ua_chan); |
168 | } | |
bec39940 | 169 | lttng_ht_destroy(ua_sess->channels); |
d80a6244 | 170 | |
aee6bafd MD |
171 | if (ua_sess->handle != -1) { |
172 | ustctl_release_handle(sock, ua_sess->handle); | |
173 | } | |
8b366481 | 174 | free(ua_sess); |
d80a6244 | 175 | } |
91d76f53 DG |
176 | |
177 | /* | |
284d8f55 DG |
178 | * Delete a traceable application structure from the global list. Never call |
179 | * this function outside of a call_rcu call. | |
91d76f53 | 180 | */ |
8b366481 DG |
181 | static |
182 | void delete_ust_app(struct ust_app *app) | |
91d76f53 | 183 | { |
8b366481 | 184 | int ret, sock; |
bec39940 | 185 | struct lttng_ht_iter iter; |
284d8f55 | 186 | struct ust_app_session *ua_sess; |
44d3bd01 | 187 | |
f6a9efaa | 188 | rcu_read_lock(); |
44d3bd01 | 189 | |
d80a6244 | 190 | /* Delete ust app sessions info */ |
852d0037 DG |
191 | sock = app->sock; |
192 | app->sock = -1; | |
d80a6244 | 193 | |
8b366481 | 194 | /* Wipe sessions */ |
bec39940 DG |
195 | cds_lfht_for_each_entry(app->sessions->ht, &iter.iter, ua_sess, |
196 | node.node) { | |
197 | ret = lttng_ht_del(app->sessions, &iter); | |
525b0740 | 198 | assert(!ret); |
852d0037 | 199 | delete_ust_app_session(app->sock, ua_sess); |
d80a6244 | 200 | } |
bec39940 | 201 | lttng_ht_destroy(app->sessions); |
d80a6244 | 202 | |
6414a713 | 203 | /* |
852d0037 DG |
204 | * Wait until we have deleted the application from the sock hash table |
205 | * before closing this socket, otherwise an application could re-use the | |
206 | * socket ID and race with the teardown, using the same hash table entry. | |
207 | * | |
208 | * It's OK to leave the close in call_rcu. We want it to stay unique for | |
209 | * all RCU readers that could run concurrently with unregister app, | |
210 | * therefore we _need_ to only close that socket after a grace period. So | |
211 | * it should stay in this RCU callback. | |
212 | * | |
213 | * This close() is a very important step of the synchronization model so | |
214 | * every modification to this function must be carefully reviewed. | |
6414a713 | 215 | */ |
799e2c4f MD |
216 | ret = close(sock); |
217 | if (ret) { | |
218 | PERROR("close"); | |
219 | } | |
4063050c | 220 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d80a6244 | 221 | |
852d0037 | 222 | DBG2("UST app pid %d deleted", app->pid); |
284d8f55 | 223 | free(app); |
bec39940 | 224 | |
f6a9efaa | 225 | rcu_read_unlock(); |
099e26bd DG |
226 | } |
227 | ||
228 | /* | |
f6a9efaa | 229 | * URCU intermediate call to delete an UST app. |
099e26bd | 230 | */ |
8b366481 DG |
231 | static |
232 | void delete_ust_app_rcu(struct rcu_head *head) | |
099e26bd | 233 | { |
bec39940 DG |
234 | struct lttng_ht_node_ulong *node = |
235 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa | 236 | struct ust_app *app = |
852d0037 | 237 | caa_container_of(node, struct ust_app, pid_n); |
f6a9efaa | 238 | |
852d0037 | 239 | DBG3("Call RCU deleting app PID %d", app->pid); |
f6a9efaa | 240 | delete_ust_app(app); |
099e26bd DG |
241 | } |
242 | ||
8b366481 DG |
243 | /* |
244 | * Alloc new UST app session. | |
245 | */ | |
246 | static | |
247 | struct ust_app_session *alloc_ust_app_session(void) | |
248 | { | |
249 | struct ust_app_session *ua_sess; | |
250 | ||
251 | /* Init most of the default value by allocating and zeroing */ | |
252 | ua_sess = zmalloc(sizeof(struct ust_app_session)); | |
253 | if (ua_sess == NULL) { | |
254 | PERROR("malloc"); | |
255 | goto error; | |
256 | } | |
257 | ||
258 | ua_sess->handle = -1; | |
bec39940 | 259 | ua_sess->channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
8b366481 DG |
260 | |
261 | return ua_sess; | |
262 | ||
263 | error: | |
264 | return NULL; | |
265 | } | |
266 | ||
267 | /* | |
268 | * Alloc new UST app channel. | |
269 | */ | |
270 | static | |
271 | struct ust_app_channel *alloc_ust_app_channel(char *name, | |
272 | struct lttng_ust_channel *attr) | |
273 | { | |
274 | struct ust_app_channel *ua_chan; | |
275 | ||
276 | /* Init most of the default value by allocating and zeroing */ | |
277 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); | |
278 | if (ua_chan == NULL) { | |
279 | PERROR("malloc"); | |
280 | goto error; | |
281 | } | |
282 | ||
283 | /* Setup channel name */ | |
284 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
285 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
286 | ||
287 | ua_chan->enabled = 1; | |
288 | ua_chan->handle = -1; | |
bec39940 DG |
289 | ua_chan->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
290 | ua_chan->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); | |
291 | lttng_ht_node_init_str(&ua_chan->node, ua_chan->name); | |
8b366481 DG |
292 | |
293 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); | |
294 | ||
295 | /* Copy attributes */ | |
296 | if (attr) { | |
297 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
298 | } | |
299 | ||
300 | DBG3("UST app channel %s allocated", ua_chan->name); | |
301 | ||
302 | return ua_chan; | |
303 | ||
304 | error: | |
305 | return NULL; | |
306 | } | |
307 | ||
308 | /* | |
309 | * Alloc new UST app event. | |
310 | */ | |
311 | static | |
312 | struct ust_app_event *alloc_ust_app_event(char *name, | |
313 | struct lttng_ust_event *attr) | |
314 | { | |
315 | struct ust_app_event *ua_event; | |
316 | ||
317 | /* Init most of the default value by allocating and zeroing */ | |
318 | ua_event = zmalloc(sizeof(struct ust_app_event)); | |
319 | if (ua_event == NULL) { | |
320 | PERROR("malloc"); | |
321 | goto error; | |
322 | } | |
323 | ||
324 | ua_event->enabled = 1; | |
325 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
326 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
bec39940 DG |
327 | ua_event->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
328 | lttng_ht_node_init_str(&ua_event->node, ua_event->name); | |
8b366481 DG |
329 | |
330 | /* Copy attributes */ | |
331 | if (attr) { | |
332 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
333 | } | |
334 | ||
335 | DBG3("UST app event %s allocated", ua_event->name); | |
336 | ||
337 | return ua_event; | |
338 | ||
339 | error: | |
340 | return NULL; | |
341 | } | |
342 | ||
343 | /* | |
344 | * Alloc new UST app context. | |
345 | */ | |
346 | static | |
347 | struct ust_app_ctx *alloc_ust_app_ctx(struct lttng_ust_context *uctx) | |
348 | { | |
349 | struct ust_app_ctx *ua_ctx; | |
350 | ||
351 | ua_ctx = zmalloc(sizeof(struct ust_app_ctx)); | |
352 | if (ua_ctx == NULL) { | |
353 | goto error; | |
354 | } | |
355 | ||
356 | if (uctx) { | |
357 | memcpy(&ua_ctx->ctx, uctx, sizeof(ua_ctx->ctx)); | |
358 | } | |
359 | ||
360 | DBG3("UST app context %d allocated", ua_ctx->ctx.ctx); | |
361 | ||
362 | error: | |
363 | return ua_ctx; | |
364 | } | |
365 | ||
099e26bd | 366 | /* |
421cb601 DG |
367 | * Find an ust_app using the sock and return it. RCU read side lock must be |
368 | * held before calling this helper function. | |
099e26bd | 369 | */ |
8b366481 DG |
370 | static |
371 | struct ust_app *find_app_by_sock(int sock) | |
099e26bd | 372 | { |
bec39940 | 373 | struct lttng_ht_node_ulong *node; |
bec39940 | 374 | struct lttng_ht_iter iter; |
f6a9efaa | 375 | |
852d0037 | 376 | lttng_ht_lookup(ust_app_ht_by_sock, (void *)((unsigned long) sock), &iter); |
bec39940 | 377 | node = lttng_ht_iter_get_node_ulong(&iter); |
f6a9efaa DG |
378 | if (node == NULL) { |
379 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
380 | goto error; |
381 | } | |
852d0037 DG |
382 | |
383 | return caa_container_of(node, struct ust_app, sock_n); | |
f6a9efaa DG |
384 | |
385 | error: | |
386 | return NULL; | |
099e26bd DG |
387 | } |
388 | ||
55cc08a6 DG |
389 | /* |
390 | * Create the channel context on the tracer. | |
391 | */ | |
392 | static | |
393 | int create_ust_channel_context(struct ust_app_channel *ua_chan, | |
394 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
395 | { | |
396 | int ret; | |
397 | ||
852d0037 | 398 | ret = ustctl_add_context(app->sock, &ua_ctx->ctx, |
55cc08a6 DG |
399 | ua_chan->obj, &ua_ctx->obj); |
400 | if (ret < 0) { | |
401 | goto error; | |
402 | } | |
403 | ||
404 | ua_ctx->handle = ua_ctx->obj->handle; | |
405 | ||
727d5404 | 406 | DBG2("UST app context created successfully for channel %s", ua_chan->name); |
55cc08a6 DG |
407 | |
408 | error: | |
409 | return ret; | |
410 | } | |
411 | ||
412 | /* | |
413 | * Create the event context on the tracer. | |
414 | */ | |
415 | static | |
416 | int create_ust_event_context(struct ust_app_event *ua_event, | |
417 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
418 | { | |
419 | int ret; | |
420 | ||
852d0037 | 421 | ret = ustctl_add_context(app->sock, &ua_ctx->ctx, |
55cc08a6 DG |
422 | ua_event->obj, &ua_ctx->obj); |
423 | if (ret < 0) { | |
424 | goto error; | |
425 | } | |
426 | ||
427 | ua_ctx->handle = ua_ctx->obj->handle; | |
428 | ||
727d5404 | 429 | DBG2("UST app context created successfully for event %s", ua_event->name); |
55cc08a6 DG |
430 | |
431 | error: | |
432 | return ret; | |
433 | } | |
434 | ||
53a80697 MD |
435 | /* |
436 | * Set the filter on the tracer. | |
437 | */ | |
438 | static | |
439 | int set_ust_event_filter(struct ust_app_event *ua_event, | |
440 | struct ust_app *app) | |
441 | { | |
442 | int ret; | |
443 | ||
444 | if (!ua_event->filter) { | |
445 | return 0; | |
446 | } | |
447 | ||
448 | ret = ustctl_set_filter(app->sock, ua_event->filter, | |
449 | ua_event->obj); | |
450 | if (ret < 0) { | |
451 | goto error; | |
452 | } | |
453 | ||
454 | DBG2("UST filter set successfully for event %s", ua_event->name); | |
455 | ||
456 | error: | |
457 | return ret; | |
458 | } | |
459 | ||
9730260e DG |
460 | /* |
461 | * Disable the specified event on to UST tracer for the UST session. | |
462 | */ | |
463 | static int disable_ust_event(struct ust_app *app, | |
464 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
465 | { | |
466 | int ret; | |
467 | ||
852d0037 | 468 | ret = ustctl_disable(app->sock, ua_event->obj); |
9730260e DG |
469 | if (ret < 0) { |
470 | ERR("UST app event %s disable failed for app (pid: %d) " | |
471 | "and session handle %d with ret %d", | |
852d0037 | 472 | ua_event->attr.name, app->pid, ua_sess->handle, ret); |
9730260e DG |
473 | goto error; |
474 | } | |
475 | ||
476 | DBG2("UST app event %s disabled successfully for app (pid: %d)", | |
852d0037 | 477 | ua_event->attr.name, app->pid); |
9730260e DG |
478 | |
479 | error: | |
480 | return ret; | |
481 | } | |
482 | ||
78f0bacd DG |
483 | /* |
484 | * Disable the specified channel on to UST tracer for the UST session. | |
485 | */ | |
486 | static int disable_ust_channel(struct ust_app *app, | |
487 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
488 | { | |
489 | int ret; | |
490 | ||
852d0037 | 491 | ret = ustctl_disable(app->sock, ua_chan->obj); |
78f0bacd DG |
492 | if (ret < 0) { |
493 | ERR("UST app channel %s disable failed for app (pid: %d) " | |
494 | "and session handle %d with ret %d", | |
852d0037 | 495 | ua_chan->name, app->pid, ua_sess->handle, ret); |
78f0bacd DG |
496 | goto error; |
497 | } | |
498 | ||
78f0bacd | 499 | DBG2("UST app channel %s disabled successfully for app (pid: %d)", |
852d0037 | 500 | ua_chan->name, app->pid); |
78f0bacd DG |
501 | |
502 | error: | |
503 | return ret; | |
504 | } | |
505 | ||
506 | /* | |
507 | * Enable the specified channel on to UST tracer for the UST session. | |
508 | */ | |
509 | static int enable_ust_channel(struct ust_app *app, | |
510 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
511 | { | |
512 | int ret; | |
513 | ||
852d0037 | 514 | ret = ustctl_enable(app->sock, ua_chan->obj); |
78f0bacd DG |
515 | if (ret < 0) { |
516 | ERR("UST app channel %s enable failed for app (pid: %d) " | |
517 | "and session handle %d with ret %d", | |
852d0037 | 518 | ua_chan->name, app->pid, ua_sess->handle, ret); |
78f0bacd DG |
519 | goto error; |
520 | } | |
521 | ||
522 | ua_chan->enabled = 1; | |
523 | ||
524 | DBG2("UST app channel %s enabled successfully for app (pid: %d)", | |
852d0037 | 525 | ua_chan->name, app->pid); |
78f0bacd DG |
526 | |
527 | error: | |
528 | return ret; | |
529 | } | |
530 | ||
edb67388 DG |
531 | /* |
532 | * Enable the specified event on to UST tracer for the UST session. | |
533 | */ | |
534 | static int enable_ust_event(struct ust_app *app, | |
535 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
536 | { | |
537 | int ret; | |
538 | ||
852d0037 | 539 | ret = ustctl_enable(app->sock, ua_event->obj); |
edb67388 DG |
540 | if (ret < 0) { |
541 | ERR("UST app event %s enable failed for app (pid: %d) " | |
542 | "and session handle %d with ret %d", | |
852d0037 | 543 | ua_event->attr.name, app->pid, ua_sess->handle, ret); |
edb67388 DG |
544 | goto error; |
545 | } | |
546 | ||
547 | DBG2("UST app event %s enabled successfully for app (pid: %d)", | |
852d0037 | 548 | ua_event->attr.name, app->pid); |
edb67388 DG |
549 | |
550 | error: | |
551 | return ret; | |
552 | } | |
553 | ||
099e26bd | 554 | /* |
5b4a0ec0 | 555 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 556 | */ |
5b4a0ec0 DG |
557 | static int open_ust_metadata(struct ust_app *app, |
558 | struct ust_app_session *ua_sess) | |
0177d773 | 559 | { |
5b4a0ec0 DG |
560 | int ret; |
561 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 562 | |
5b4a0ec0 DG |
563 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
564 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
565 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
566 | uattr.switch_timer_interval = | |
567 | ua_sess->metadata->attr.switch_timer_interval; | |
568 | uattr.read_timer_interval = | |
569 | ua_sess->metadata->attr.read_timer_interval; | |
570 | uattr.output = ua_sess->metadata->attr.output; | |
571 | ||
4063050c MD |
572 | /* We are going to receive 2 fds, we need to reserve them. */ |
573 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
574 | if (ret < 0) { | |
575 | ERR("Exhausted number of available FD upon metadata open"); | |
576 | goto error; | |
577 | } | |
5b4a0ec0 | 578 | /* UST tracer metadata creation */ |
852d0037 | 579 | ret = ustctl_open_metadata(app->sock, ua_sess->handle, &uattr, |
5b4a0ec0 DG |
580 | &ua_sess->metadata->obj); |
581 | if (ret < 0) { | |
fc34caaa | 582 | ERR("UST app open metadata failed for app pid:%d with ret %d", |
852d0037 | 583 | app->pid, ret); |
f6a9efaa | 584 | goto error; |
0177d773 | 585 | } |
f6a9efaa | 586 | |
6d3686da DG |
587 | ua_sess->metadata->handle = ua_sess->metadata->obj->handle; |
588 | ||
f6a9efaa | 589 | error: |
5b4a0ec0 | 590 | return ret; |
91d76f53 DG |
591 | } |
592 | ||
593 | /* | |
5b4a0ec0 | 594 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 595 | */ |
5b4a0ec0 DG |
596 | static int create_ust_stream(struct ust_app *app, |
597 | struct ust_app_session *ua_sess) | |
91d76f53 | 598 | { |
5b4a0ec0 | 599 | int ret; |
421cb601 | 600 | |
4063050c MD |
601 | /* We are going to receive 2 fds, we need to reserve them. */ |
602 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
603 | if (ret < 0) { | |
604 | ERR("Exhausted number of available FD upon metadata stream create"); | |
605 | goto error; | |
606 | } | |
852d0037 | 607 | ret = ustctl_create_stream(app->sock, ua_sess->metadata->obj, |
5b4a0ec0 DG |
608 | &ua_sess->metadata->stream_obj); |
609 | if (ret < 0) { | |
610 | ERR("UST create metadata stream failed"); | |
421cb601 | 611 | goto error; |
91d76f53 | 612 | } |
421cb601 | 613 | |
421cb601 | 614 | error: |
5b4a0ec0 | 615 | return ret; |
91d76f53 DG |
616 | } |
617 | ||
b551a063 | 618 | /* |
5b4a0ec0 | 619 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 620 | */ |
5b4a0ec0 DG |
621 | static int create_ust_channel(struct ust_app *app, |
622 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 623 | { |
5b4a0ec0 | 624 | int ret; |
b551a063 | 625 | |
5b4a0ec0 | 626 | /* TODO: remove cast and use lttng-ust-abi.h */ |
4063050c MD |
627 | |
628 | /* We are going to receive 2 fds, we need to reserve them. */ | |
629 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
630 | if (ret < 0) { | |
631 | ERR("Exhausted number of available FD upon create channel"); | |
632 | goto error; | |
633 | } | |
852d0037 | 634 | ret = ustctl_create_channel(app->sock, ua_sess->handle, |
5b4a0ec0 DG |
635 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); |
636 | if (ret < 0) { | |
58f3ca76 | 637 | ERR("Creating channel %s for app (pid: %d, sock: %d) " |
5b4a0ec0 | 638 | "and session handle %d with ret %d", |
852d0037 | 639 | ua_chan->name, app->pid, app->sock, |
5b4a0ec0 | 640 | ua_sess->handle, ret); |
4063050c | 641 | lttng_fd_put(LTTNG_FD_APPS, 2); |
b551a063 DG |
642 | goto error; |
643 | } | |
644 | ||
5b4a0ec0 | 645 | ua_chan->handle = ua_chan->obj->handle; |
b551a063 | 646 | |
5b4a0ec0 | 647 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
852d0037 | 648 | ua_chan->name, app->pid, app->sock); |
b551a063 | 649 | |
8535a6d9 DG |
650 | /* If channel is not enabled, disable it on the tracer */ |
651 | if (!ua_chan->enabled) { | |
652 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
653 | if (ret < 0) { | |
654 | goto error; | |
655 | } | |
656 | } | |
657 | ||
b551a063 DG |
658 | error: |
659 | return ret; | |
660 | } | |
661 | ||
91d76f53 | 662 | /* |
5b4a0ec0 | 663 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 664 | */ |
edb67388 DG |
665 | static |
666 | int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess, | |
667 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event) | |
91d76f53 | 668 | { |
5b4a0ec0 | 669 | int ret = 0; |
284d8f55 | 670 | |
5b4a0ec0 | 671 | /* Create UST event on tracer */ |
852d0037 | 672 | ret = ustctl_create_event(app->sock, &ua_event->attr, ua_chan->obj, |
5b4a0ec0 DG |
673 | &ua_event->obj); |
674 | if (ret < 0) { | |
a027b2d2 | 675 | if (ret == -EEXIST || ret == -EPERM) { |
fc34caaa DG |
676 | ret = 0; |
677 | goto error; | |
678 | } | |
5b4a0ec0 | 679 | ERR("Error ustctl create event %s for app pid: %d with ret %d", |
852d0037 | 680 | ua_event->attr.name, app->pid, ret); |
5b4a0ec0 | 681 | goto error; |
91d76f53 | 682 | } |
f6a9efaa | 683 | |
5b4a0ec0 | 684 | ua_event->handle = ua_event->obj->handle; |
284d8f55 | 685 | |
5b4a0ec0 | 686 | DBG2("UST app event %s created successfully for pid:%d", |
852d0037 | 687 | ua_event->attr.name, app->pid); |
f6a9efaa | 688 | |
8535a6d9 | 689 | /* If event not enabled, disable it on the tracer */ |
fc34caaa | 690 | if (ua_event->enabled == 0) { |
8535a6d9 DG |
691 | ret = disable_ust_event(app, ua_sess, ua_event); |
692 | if (ret < 0) { | |
fc34caaa DG |
693 | /* |
694 | * If we hit an EPERM, something is wrong with our disable call. If | |
695 | * we get an EEXIST, there is a problem on the tracer side since we | |
696 | * just created it. | |
697 | */ | |
698 | switch (ret) { | |
699 | case -EPERM: | |
700 | /* Code flow problem */ | |
701 | assert(0); | |
702 | case -EEXIST: | |
703 | /* It's OK for our use case. */ | |
704 | ret = 0; | |
705 | break; | |
706 | default: | |
707 | break; | |
708 | } | |
8535a6d9 DG |
709 | goto error; |
710 | } | |
711 | } | |
712 | ||
5b4a0ec0 DG |
713 | error: |
714 | return ret; | |
91d76f53 | 715 | } |
48842b30 | 716 | |
5b4a0ec0 DG |
717 | /* |
718 | * Copy data between an UST app event and a LTT event. | |
719 | */ | |
421cb601 | 720 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
721 | struct ltt_ust_event *uevent) |
722 | { | |
bec39940 | 723 | struct lttng_ht_iter iter; |
55cc08a6 DG |
724 | struct ltt_ust_context *uctx; |
725 | struct ust_app_ctx *ua_ctx; | |
726 | ||
48842b30 DG |
727 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); |
728 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
729 | ||
fc34caaa DG |
730 | ua_event->enabled = uevent->enabled; |
731 | ||
5b4a0ec0 DG |
732 | /* Copy event attributes */ |
733 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
734 | ||
53a80697 MD |
735 | /* Copy filter bytecode */ |
736 | if (uevent->filter) { | |
737 | ua_event->filter = zmalloc(sizeof(*ua_event->filter) + | |
738 | uevent->filter->len); | |
739 | if (!ua_event->filter) { | |
740 | return; | |
741 | } | |
742 | memcpy(ua_event->filter, uevent->filter, | |
743 | sizeof(*ua_event->filter) + uevent->filter->len); | |
744 | } | |
bec39940 | 745 | cds_lfht_for_each_entry(uevent->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
746 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
747 | if (ua_ctx == NULL) { | |
fc34caaa DG |
748 | /* malloc() failed. We should simply stop */ |
749 | return; | |
55cc08a6 | 750 | } |
fc34caaa | 751 | |
bec39940 DG |
752 | lttng_ht_node_init_ulong(&ua_ctx->node, |
753 | (unsigned long) ua_ctx->ctx.ctx); | |
754 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 | 755 | } |
48842b30 DG |
756 | } |
757 | ||
5b4a0ec0 DG |
758 | /* |
759 | * Copy data between an UST app channel and a LTT channel. | |
760 | */ | |
421cb601 | 761 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
762 | struct ltt_ust_channel *uchan) |
763 | { | |
bec39940 DG |
764 | struct lttng_ht_iter iter; |
765 | struct lttng_ht_node_str *ua_event_node; | |
48842b30 | 766 | struct ltt_ust_event *uevent; |
55cc08a6 | 767 | struct ltt_ust_context *uctx; |
48842b30 | 768 | struct ust_app_event *ua_event; |
55cc08a6 | 769 | struct ust_app_ctx *ua_ctx; |
48842b30 | 770 | |
fc34caaa | 771 | DBG2("UST app shadow copy of channel %s started", ua_chan->name); |
48842b30 DG |
772 | |
773 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
774 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
775 | /* Copy event attributes */ |
776 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 | 777 | |
fc34caaa DG |
778 | ua_chan->enabled = uchan->enabled; |
779 | ||
bec39940 | 780 | cds_lfht_for_each_entry(uchan->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
781 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
782 | if (ua_ctx == NULL) { | |
783 | continue; | |
784 | } | |
bec39940 DG |
785 | lttng_ht_node_init_ulong(&ua_ctx->node, |
786 | (unsigned long) ua_ctx->ctx.ctx); | |
787 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 | 788 | } |
48842b30 | 789 | |
421cb601 | 790 | /* Copy all events from ltt ust channel to ust app channel */ |
bec39940 DG |
791 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
792 | struct lttng_ht_iter uiter; | |
ba767faf | 793 | |
bec39940 DG |
794 | lttng_ht_lookup(ua_chan->events, (void *) uevent->attr.name, &uiter); |
795 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
48842b30 | 796 | if (ua_event_node == NULL) { |
421cb601 | 797 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 798 | uevent->attr.name); |
284d8f55 | 799 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 800 | if (ua_event == NULL) { |
5b4a0ec0 | 801 | continue; |
48842b30 | 802 | } |
421cb601 | 803 | shadow_copy_event(ua_event, uevent); |
bec39940 | 804 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
48842b30 | 805 | } |
48842b30 DG |
806 | } |
807 | ||
fc34caaa | 808 | DBG3("UST app shadow copy of channel %s done", ua_chan->name); |
48842b30 DG |
809 | } |
810 | ||
5b4a0ec0 DG |
811 | /* |
812 | * Copy data between a UST app session and a regular LTT session. | |
813 | */ | |
421cb601 | 814 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
bec39940 | 815 | struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 | 816 | { |
bec39940 DG |
817 | struct lttng_ht_node_str *ua_chan_node; |
818 | struct lttng_ht_iter iter; | |
48842b30 DG |
819 | struct ltt_ust_channel *uchan; |
820 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
821 | time_t rawtime; |
822 | struct tm *timeinfo; | |
823 | char datetime[16]; | |
824 | int ret; | |
825 | ||
826 | /* Get date and time for unique app path */ | |
827 | time(&rawtime); | |
828 | timeinfo = localtime(&rawtime); | |
829 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 830 | |
421cb601 | 831 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 | 832 | |
a991f516 | 833 | ua_sess->id = usess->id; |
6df2e2c9 MD |
834 | ua_sess->uid = usess->uid; |
835 | ua_sess->gid = usess->gid; | |
48842b30 | 836 | |
00e2e675 DG |
837 | ret = snprintf(ua_sess->path, PATH_MAX, "%s-%d-%s/", app->name, app->pid, |
838 | datetime); | |
477d7741 MD |
839 | if (ret < 0) { |
840 | PERROR("asprintf UST shadow copy session"); | |
841 | /* TODO: We cannot return an error from here.. */ | |
842 | assert(0); | |
843 | } | |
844 | ||
48842b30 DG |
845 | /* TODO: support all UST domain */ |
846 | ||
847 | /* Iterate over all channels in global domain. */ | |
bec39940 DG |
848 | cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter, |
849 | uchan, node.node) { | |
850 | struct lttng_ht_iter uiter; | |
ba767faf | 851 | |
bec39940 DG |
852 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
853 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
5b4a0ec0 | 854 | if (ua_chan_node != NULL) { |
fc34caaa | 855 | /* Session exist. Contiuing. */ |
5b4a0ec0 DG |
856 | continue; |
857 | } | |
421cb601 | 858 | |
5b4a0ec0 DG |
859 | DBG2("Channel %s not found on shadow session copy, creating it", |
860 | uchan->name); | |
861 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
862 | if (ua_chan == NULL) { | |
fc34caaa | 863 | /* malloc failed FIXME: Might want to do handle ENOMEM .. */ |
5b4a0ec0 | 864 | continue; |
48842b30 DG |
865 | } |
866 | ||
5b4a0ec0 | 867 | shadow_copy_channel(ua_chan, uchan); |
bec39940 | 868 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
48842b30 DG |
869 | } |
870 | } | |
871 | ||
78f0bacd DG |
872 | /* |
873 | * Lookup sesison wrapper. | |
874 | */ | |
84cd17c6 MD |
875 | static |
876 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
bec39940 | 877 | struct ust_app *app, struct lttng_ht_iter *iter) |
84cd17c6 MD |
878 | { |
879 | /* Get right UST app session from app */ | |
2c348c10 | 880 | lttng_ht_lookup(app->sessions, (void *)((unsigned long) usess->id), iter); |
84cd17c6 MD |
881 | } |
882 | ||
421cb601 DG |
883 | /* |
884 | * Return ust app session from the app session hashtable using the UST session | |
a991f516 | 885 | * id. |
421cb601 | 886 | */ |
48842b30 DG |
887 | static struct ust_app_session *lookup_session_by_app( |
888 | struct ltt_ust_session *usess, struct ust_app *app) | |
889 | { | |
bec39940 DG |
890 | struct lttng_ht_iter iter; |
891 | struct lttng_ht_node_ulong *node; | |
48842b30 | 892 | |
84cd17c6 | 893 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 894 | node = lttng_ht_iter_get_node_ulong(&iter); |
48842b30 DG |
895 | if (node == NULL) { |
896 | goto error; | |
897 | } | |
898 | ||
899 | return caa_container_of(node, struct ust_app_session, node); | |
900 | ||
901 | error: | |
902 | return NULL; | |
903 | } | |
904 | ||
421cb601 DG |
905 | /* |
906 | * Create a UST session onto the tracer of app and add it the session | |
907 | * hashtable. | |
908 | * | |
909 | * Return ust app session or NULL on error. | |
910 | */ | |
911 | static struct ust_app_session *create_ust_app_session( | |
912 | struct ltt_ust_session *usess, struct ust_app *app) | |
913 | { | |
914 | int ret; | |
915 | struct ust_app_session *ua_sess; | |
916 | ||
917 | ua_sess = lookup_session_by_app(usess, app); | |
918 | if (ua_sess == NULL) { | |
a991f516 | 919 | DBG2("UST app pid: %d session id %d not found, creating it", |
852d0037 | 920 | app->pid, usess->id); |
421cb601 DG |
921 | ua_sess = alloc_ust_app_session(); |
922 | if (ua_sess == NULL) { | |
923 | /* Only malloc can failed so something is really wrong */ | |
fc34caaa | 924 | goto end; |
421cb601 | 925 | } |
477d7741 | 926 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
927 | } |
928 | ||
929 | if (ua_sess->handle == -1) { | |
852d0037 | 930 | ret = ustctl_create_session(app->sock); |
421cb601 | 931 | if (ret < 0) { |
852d0037 | 932 | ERR("Creating session for app pid %d", app->pid); |
915d047c DG |
933 | /* This means that the tracer is gone... */ |
934 | ua_sess = (void*) -1UL; | |
421cb601 DG |
935 | goto error; |
936 | } | |
937 | ||
421cb601 DG |
938 | ua_sess->handle = ret; |
939 | ||
940 | /* Add ust app session to app's HT */ | |
2c348c10 | 941 | lttng_ht_node_init_ulong(&ua_sess->node, (unsigned long) ua_sess->id); |
bec39940 | 942 | lttng_ht_add_unique_ulong(app->sessions, &ua_sess->node); |
421cb601 DG |
943 | |
944 | DBG2("UST app session created successfully with handle %d", ret); | |
945 | } | |
946 | ||
fc34caaa | 947 | end: |
421cb601 DG |
948 | return ua_sess; |
949 | ||
950 | error: | |
fc34caaa | 951 | delete_ust_app_session(-1, ua_sess); |
421cb601 DG |
952 | return NULL; |
953 | } | |
954 | ||
55cc08a6 DG |
955 | /* |
956 | * Create a context for the channel on the tracer. | |
957 | */ | |
958 | static | |
959 | int create_ust_app_channel_context(struct ust_app_session *ua_sess, | |
960 | struct ust_app_channel *ua_chan, struct lttng_ust_context *uctx, | |
961 | struct ust_app *app) | |
962 | { | |
963 | int ret = 0; | |
bec39940 DG |
964 | struct lttng_ht_iter iter; |
965 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
966 | struct ust_app_ctx *ua_ctx; |
967 | ||
968 | DBG2("UST app adding context to channel %s", ua_chan->name); | |
969 | ||
bec39940 DG |
970 | lttng_ht_lookup(ua_chan->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
971 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
972 | if (node != NULL) { |
973 | ret = -EEXIST; | |
974 | goto error; | |
975 | } | |
976 | ||
977 | ua_ctx = alloc_ust_app_ctx(uctx); | |
978 | if (ua_ctx == NULL) { | |
979 | /* malloc failed */ | |
980 | ret = -1; | |
981 | goto error; | |
982 | } | |
983 | ||
bec39940 DG |
984 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
985 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 DG |
986 | |
987 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
988 | if (ret < 0) { | |
989 | goto error; | |
990 | } | |
991 | ||
992 | error: | |
993 | return ret; | |
994 | } | |
995 | ||
996 | /* | |
997 | * Create an UST context and enable it for the event on the tracer. | |
998 | */ | |
999 | static | |
1000 | int create_ust_app_event_context(struct ust_app_session *ua_sess, | |
1001 | struct ust_app_event *ua_event, struct lttng_ust_context *uctx, | |
1002 | struct ust_app *app) | |
1003 | { | |
1004 | int ret = 0; | |
bec39940 DG |
1005 | struct lttng_ht_iter iter; |
1006 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
1007 | struct ust_app_ctx *ua_ctx; |
1008 | ||
1009 | DBG2("UST app adding context to event %s", ua_event->name); | |
1010 | ||
bec39940 DG |
1011 | lttng_ht_lookup(ua_event->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
1012 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
1013 | if (node != NULL) { |
1014 | ret = -EEXIST; | |
1015 | goto error; | |
1016 | } | |
1017 | ||
1018 | ua_ctx = alloc_ust_app_ctx(uctx); | |
1019 | if (ua_ctx == NULL) { | |
1020 | /* malloc failed */ | |
1021 | ret = -1; | |
1022 | goto error; | |
1023 | } | |
1024 | ||
bec39940 DG |
1025 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
1026 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 DG |
1027 | |
1028 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
1029 | if (ret < 0) { | |
1030 | goto error; | |
1031 | } | |
1032 | ||
1033 | error: | |
1034 | return ret; | |
1035 | } | |
1036 | ||
53a80697 MD |
1037 | /* |
1038 | * Set UST filter for the event on the tracer. | |
1039 | */ | |
1040 | static | |
1041 | int set_ust_app_event_filter(struct ust_app_session *ua_sess, | |
1042 | struct ust_app_event *ua_event, | |
1043 | struct lttng_filter_bytecode *bytecode, | |
1044 | struct ust_app *app) | |
1045 | { | |
1046 | int ret = 0; | |
1047 | ||
1048 | DBG2("UST app adding context to event %s", ua_event->name); | |
1049 | ||
1050 | /* Copy filter bytecode */ | |
1051 | ua_event->filter = zmalloc(sizeof(*ua_event->filter) + bytecode->len); | |
1052 | if (!ua_event->filter) { | |
1053 | return -ENOMEM; | |
1054 | } | |
1055 | memcpy(ua_event->filter, bytecode, | |
1056 | sizeof(*ua_event->filter) + bytecode->len); | |
1057 | ret = set_ust_event_filter(ua_event, app); | |
1058 | if (ret < 0) { | |
1059 | goto error; | |
1060 | } | |
1061 | ||
1062 | error: | |
1063 | return ret; | |
1064 | } | |
1065 | ||
edb67388 DG |
1066 | /* |
1067 | * Enable on the tracer side a ust app event for the session and channel. | |
1068 | */ | |
1069 | static | |
1070 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 1071 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
1072 | { |
1073 | int ret; | |
1074 | ||
1075 | ret = enable_ust_event(app, ua_sess, ua_event); | |
1076 | if (ret < 0) { | |
1077 | goto error; | |
1078 | } | |
1079 | ||
1080 | ua_event->enabled = 1; | |
1081 | ||
1082 | error: | |
1083 | return ret; | |
1084 | } | |
1085 | ||
9730260e DG |
1086 | /* |
1087 | * Disable on the tracer side a ust app event for the session and channel. | |
1088 | */ | |
1089 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
7f79d3a1 | 1090 | struct ust_app_event *ua_event, struct ust_app *app) |
9730260e DG |
1091 | { |
1092 | int ret; | |
1093 | ||
1094 | ret = disable_ust_event(app, ua_sess, ua_event); | |
1095 | if (ret < 0) { | |
1096 | goto error; | |
1097 | } | |
1098 | ||
1099 | ua_event->enabled = 0; | |
1100 | ||
1101 | error: | |
1102 | return ret; | |
1103 | } | |
1104 | ||
78f0bacd DG |
1105 | /* |
1106 | * Lookup ust app channel for session and disable it on the tracer side. | |
1107 | */ | |
8535a6d9 DG |
1108 | static |
1109 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
1110 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 1111 | { |
8535a6d9 | 1112 | int ret; |
78f0bacd DG |
1113 | |
1114 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
1115 | if (ret < 0) { | |
1116 | goto error; | |
1117 | } | |
1118 | ||
8535a6d9 DG |
1119 | ua_chan->enabled = 0; |
1120 | ||
78f0bacd DG |
1121 | error: |
1122 | return ret; | |
1123 | } | |
1124 | ||
1125 | /* | |
1126 | * Lookup ust app channel for session and enable it on the tracer side. | |
1127 | */ | |
1128 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
1129 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
1130 | { | |
1131 | int ret = 0; | |
bec39940 DG |
1132 | struct lttng_ht_iter iter; |
1133 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1134 | struct ust_app_channel *ua_chan; |
1135 | ||
bec39940 DG |
1136 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1137 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
78f0bacd | 1138 | if (ua_chan_node == NULL) { |
a991f516 MD |
1139 | DBG2("Unable to find channel %s in ust session id %u", |
1140 | uchan->name, ua_sess->id); | |
78f0bacd DG |
1141 | goto error; |
1142 | } | |
1143 | ||
1144 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1145 | ||
1146 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
1147 | if (ret < 0) { | |
1148 | goto error; | |
1149 | } | |
1150 | ||
1151 | error: | |
1152 | return ret; | |
1153 | } | |
1154 | ||
284d8f55 | 1155 | /* |
5b4a0ec0 | 1156 | * Create UST app channel and create it on the tracer. |
284d8f55 | 1157 | */ |
5b4a0ec0 DG |
1158 | static struct ust_app_channel *create_ust_app_channel( |
1159 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
1160 | struct ust_app *app) | |
1161 | { | |
1162 | int ret = 0; | |
bec39940 DG |
1163 | struct lttng_ht_iter iter; |
1164 | struct lttng_ht_node_str *ua_chan_node; | |
5b4a0ec0 DG |
1165 | struct ust_app_channel *ua_chan; |
1166 | ||
1167 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1168 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1169 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
fc34caaa | 1170 | if (ua_chan_node != NULL) { |
5b4a0ec0 | 1171 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
fc34caaa | 1172 | goto end; |
5b4a0ec0 DG |
1173 | } |
1174 | ||
fc34caaa DG |
1175 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); |
1176 | if (ua_chan == NULL) { | |
1177 | /* Only malloc can fail here */ | |
1178 | goto error; | |
1179 | } | |
1180 | shadow_copy_channel(ua_chan, uchan); | |
1181 | ||
5b4a0ec0 DG |
1182 | ret = create_ust_channel(app, ua_sess, ua_chan); |
1183 | if (ret < 0) { | |
fc34caaa DG |
1184 | /* Not found previously means that it does not exist on the tracer */ |
1185 | assert(ret != -EEXIST); | |
5b4a0ec0 DG |
1186 | goto error; |
1187 | } | |
1188 | ||
58f3ca76 DG |
1189 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
1190 | ||
fc34caaa | 1191 | DBG2("UST app create channel %s for PID %d completed", ua_chan->name, |
852d0037 | 1192 | app->pid); |
fc34caaa DG |
1193 | |
1194 | end: | |
5b4a0ec0 DG |
1195 | return ua_chan; |
1196 | ||
1197 | error: | |
fc34caaa | 1198 | delete_ust_app_channel(-1, ua_chan); |
5b4a0ec0 DG |
1199 | return NULL; |
1200 | } | |
1201 | ||
1202 | /* | |
1203 | * Create UST app event and create it on the tracer side. | |
1204 | */ | |
edb67388 DG |
1205 | static |
1206 | int create_ust_app_event(struct ust_app_session *ua_sess, | |
1207 | struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent, | |
1208 | struct ust_app *app) | |
284d8f55 | 1209 | { |
edb67388 | 1210 | int ret = 0; |
bec39940 DG |
1211 | struct lttng_ht_iter iter; |
1212 | struct lttng_ht_node_str *ua_event_node; | |
5b4a0ec0 | 1213 | struct ust_app_event *ua_event; |
284d8f55 | 1214 | |
5b4a0ec0 | 1215 | /* Get event node */ |
bec39940 DG |
1216 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
1217 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
edb67388 | 1218 | if (ua_event_node != NULL) { |
fc34caaa | 1219 | ret = -EEXIST; |
edb67388 DG |
1220 | goto end; |
1221 | } | |
5b4a0ec0 | 1222 | |
edb67388 DG |
1223 | /* Does not exist so create one */ |
1224 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
1225 | if (ua_event == NULL) { | |
1226 | /* Only malloc can failed so something is really wrong */ | |
1227 | ret = -ENOMEM; | |
fc34caaa | 1228 | goto end; |
5b4a0ec0 | 1229 | } |
edb67388 | 1230 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 1231 | |
edb67388 | 1232 | /* Create it on the tracer side */ |
5b4a0ec0 | 1233 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 1234 | if (ret < 0) { |
fc34caaa DG |
1235 | /* Not found previously means that it does not exist on the tracer */ |
1236 | assert(ret != -EEXIST); | |
284d8f55 DG |
1237 | goto error; |
1238 | } | |
1239 | ||
bec39940 | 1240 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
284d8f55 | 1241 | |
fc34caaa | 1242 | DBG2("UST app create event %s for PID %d completed", ua_event->name, |
852d0037 | 1243 | app->pid); |
7f79d3a1 | 1244 | |
edb67388 | 1245 | end: |
fc34caaa DG |
1246 | return ret; |
1247 | ||
5b4a0ec0 | 1248 | error: |
fc34caaa DG |
1249 | /* Valid. Calling here is already in a read side lock */ |
1250 | delete_ust_app_event(-1, ua_event); | |
edb67388 | 1251 | return ret; |
5b4a0ec0 DG |
1252 | } |
1253 | ||
1254 | /* | |
1255 | * Create UST metadata and open it on the tracer side. | |
1256 | */ | |
1257 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
1258 | char *pathname, struct ust_app *app) | |
1259 | { | |
1260 | int ret = 0; | |
1261 | ||
1262 | if (ua_sess->metadata == NULL) { | |
1263 | /* Allocate UST metadata */ | |
1264 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
1265 | if (ua_sess->metadata == NULL) { | |
fc34caaa | 1266 | /* malloc() failed */ |
5b4a0ec0 DG |
1267 | goto error; |
1268 | } | |
1269 | ||
1270 | ret = open_ust_metadata(app, ua_sess); | |
1271 | if (ret < 0) { | |
7db205b5 DG |
1272 | DBG3("Opening metadata failed. Cleaning up memory"); |
1273 | ||
fc34caaa DG |
1274 | /* Cleanup failed metadata struct */ |
1275 | free(ua_sess->metadata); | |
7db205b5 DG |
1276 | /* |
1277 | * This is very important because delete_ust_app_session check if | |
1278 | * the pointer is null or not in order to delete the metadata. | |
1279 | */ | |
1280 | ua_sess->metadata = NULL; | |
5b4a0ec0 DG |
1281 | goto error; |
1282 | } | |
1283 | ||
852d0037 | 1284 | DBG2("UST metadata opened for app pid %d", app->pid); |
5b4a0ec0 DG |
1285 | } |
1286 | ||
1287 | /* Open UST metadata stream */ | |
1288 | if (ua_sess->metadata->stream_obj == NULL) { | |
1289 | ret = create_ust_stream(app, ua_sess); | |
1290 | if (ret < 0) { | |
1291 | goto error; | |
1292 | } | |
1293 | ||
477d7741 MD |
1294 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
1295 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
1296 | if (ret < 0) { |
1297 | PERROR("asprintf UST create stream"); | |
1298 | goto error; | |
1299 | } | |
1300 | ||
1301 | DBG2("UST metadata stream object created for app pid %d", | |
852d0037 | 1302 | app->pid); |
5b4a0ec0 DG |
1303 | } else { |
1304 | ERR("Attempting to create stream without metadata opened"); | |
1305 | goto error; | |
1306 | } | |
1307 | ||
1308 | return 0; | |
1309 | ||
1310 | error: | |
1311 | return -1; | |
1312 | } | |
1313 | ||
1314 | /* | |
1315 | * Return pointer to traceable apps list. | |
1316 | */ | |
bec39940 | 1317 | struct lttng_ht *ust_app_get_ht(void) |
5b4a0ec0 DG |
1318 | { |
1319 | return ust_app_ht; | |
1320 | } | |
1321 | ||
1322 | /* | |
1323 | * Return ust app pointer or NULL if not found. | |
1324 | */ | |
1325 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
1326 | { | |
bec39940 DG |
1327 | struct lttng_ht_node_ulong *node; |
1328 | struct lttng_ht_iter iter; | |
5b4a0ec0 DG |
1329 | |
1330 | rcu_read_lock(); | |
bec39940 DG |
1331 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) pid), &iter); |
1332 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1333 | if (node == NULL) { |
1334 | DBG2("UST app no found with pid %d", pid); | |
1335 | goto error; | |
1336 | } | |
1337 | rcu_read_unlock(); | |
1338 | ||
1339 | DBG2("Found UST app by pid %d", pid); | |
1340 | ||
852d0037 | 1341 | return caa_container_of(node, struct ust_app, pid_n); |
5b4a0ec0 DG |
1342 | |
1343 | error: | |
1344 | rcu_read_unlock(); | |
1345 | return NULL; | |
1346 | } | |
1347 | ||
1348 | /* | |
1349 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
1350 | * add it to the global traceable app list. | |
1351 | * | |
0df502fd MD |
1352 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
1353 | * bitness is not supported. | |
5b4a0ec0 DG |
1354 | */ |
1355 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
1356 | { | |
1357 | struct ust_app *lta; | |
799e2c4f | 1358 | int ret; |
5b4a0ec0 | 1359 | |
7753dea8 MD |
1360 | if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL) |
1361 | || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) { | |
f943b0fb | 1362 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1363 | "%d-bit long, but no consumerd for this long size is available.\n", |
1364 | msg->name, msg->pid, msg->bits_per_long); | |
799e2c4f MD |
1365 | ret = close(sock); |
1366 | if (ret) { | |
1367 | PERROR("close"); | |
1368 | } | |
4063050c | 1369 | lttng_fd_put(LTTNG_FD_APPS, 1); |
0df502fd MD |
1370 | return -EINVAL; |
1371 | } | |
3f2c5fcc MD |
1372 | if (msg->major != LTTNG_UST_COMM_MAJOR) { |
1373 | ERR("Registration failed: application \"%s\" (pid: %d) has " | |
1374 | "communication protocol version %u.%u, but sessiond supports 2.x.\n", | |
1375 | msg->name, msg->pid, msg->major, msg->minor); | |
799e2c4f MD |
1376 | ret = close(sock); |
1377 | if (ret) { | |
1378 | PERROR("close"); | |
1379 | } | |
4063050c | 1380 | lttng_fd_put(LTTNG_FD_APPS, 1); |
3f2c5fcc MD |
1381 | return -EINVAL; |
1382 | } | |
5b4a0ec0 DG |
1383 | lta = zmalloc(sizeof(struct ust_app)); |
1384 | if (lta == NULL) { | |
1385 | PERROR("malloc"); | |
1386 | return -ENOMEM; | |
1387 | } | |
1388 | ||
1389 | lta->ppid = msg->ppid; | |
1390 | lta->uid = msg->uid; | |
1391 | lta->gid = msg->gid; | |
e0c7ec2b | 1392 | lta->compatible = 0; /* Not compatible until proven */ |
7753dea8 | 1393 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1394 | lta->v_major = msg->major; |
1395 | lta->v_minor = msg->minor; | |
1396 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1397 | lta->name[16] = '\0'; | |
bec39940 | 1398 | lta->sessions = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
5b4a0ec0 | 1399 | |
852d0037 DG |
1400 | lta->pid = msg->pid; |
1401 | lttng_ht_node_init_ulong(<a->pid_n, (unsigned long)lta->pid); | |
1402 | lta->sock = sock; | |
1403 | lttng_ht_node_init_ulong(<a->sock_n, (unsigned long)lta->sock); | |
5b4a0ec0 DG |
1404 | |
1405 | rcu_read_lock(); | |
852d0037 DG |
1406 | |
1407 | /* | |
1408 | * On a re-registration, we want to kick out the previous registration of | |
1409 | * that pid | |
1410 | */ | |
1411 | lttng_ht_add_replace_ulong(ust_app_ht, <a->pid_n); | |
1412 | ||
1413 | /* | |
1414 | * The socket _should_ be unique until _we_ call close. So, a add_unique | |
1415 | * for the ust_app_ht_by_sock is used which asserts fail if the entry was | |
1416 | * already in the table. | |
1417 | */ | |
1418 | lttng_ht_add_unique_ulong(ust_app_ht_by_sock, <a->sock_n); | |
1419 | ||
5b4a0ec0 DG |
1420 | rcu_read_unlock(); |
1421 | ||
1422 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
852d0037 DG |
1423 | " (version %d.%d)", lta->pid, lta->ppid, lta->uid, lta->gid, |
1424 | lta->sock, lta->name, lta->v_major, lta->v_minor); | |
5b4a0ec0 DG |
1425 | |
1426 | return 0; | |
1427 | } | |
1428 | ||
1429 | /* | |
1430 | * Unregister app by removing it from the global traceable app list and freeing | |
1431 | * the data struct. | |
1432 | * | |
1433 | * The socket is already closed at this point so no close to sock. | |
1434 | */ | |
1435 | void ust_app_unregister(int sock) | |
1436 | { | |
1437 | struct ust_app *lta; | |
bec39940 DG |
1438 | struct lttng_ht_node_ulong *node; |
1439 | struct lttng_ht_iter iter; | |
525b0740 | 1440 | int ret; |
5b4a0ec0 DG |
1441 | |
1442 | rcu_read_lock(); | |
886459c6 | 1443 | |
5b4a0ec0 | 1444 | /* Get the node reference for a call_rcu */ |
852d0037 | 1445 | lttng_ht_lookup(ust_app_ht_by_sock, (void *)((unsigned long) sock), &iter); |
bec39940 | 1446 | node = lttng_ht_iter_get_node_ulong(&iter); |
5b4a0ec0 | 1447 | if (node == NULL) { |
852d0037 | 1448 | ERR("Unable to find app by sock %d", sock); |
5b4a0ec0 DG |
1449 | goto error; |
1450 | } | |
284d8f55 | 1451 | |
852d0037 DG |
1452 | lta = caa_container_of(node, struct ust_app, sock_n); |
1453 | ||
1454 | DBG("PID %d unregistering with sock %d", lta->pid, sock); | |
1455 | ||
886459c6 | 1456 | /* Remove application from PID hash table */ |
852d0037 DG |
1457 | ret = lttng_ht_del(ust_app_ht_by_sock, &iter); |
1458 | assert(!ret); | |
1459 | ||
1460 | /* Assign second node for deletion */ | |
1461 | iter.iter.node = <a->pid_n.node; | |
1462 | ||
bec39940 | 1463 | ret = lttng_ht_del(ust_app_ht, &iter); |
525b0740 | 1464 | assert(!ret); |
852d0037 DG |
1465 | |
1466 | /* Free memory */ | |
1467 | call_rcu(<a->pid_n.head, delete_ust_app_rcu); | |
1468 | ||
284d8f55 | 1469 | error: |
5b4a0ec0 DG |
1470 | rcu_read_unlock(); |
1471 | return; | |
284d8f55 DG |
1472 | } |
1473 | ||
1474 | /* | |
5b4a0ec0 | 1475 | * Return traceable_app_count |
284d8f55 | 1476 | */ |
5b4a0ec0 | 1477 | unsigned long ust_app_list_count(void) |
284d8f55 | 1478 | { |
5b4a0ec0 | 1479 | unsigned long count; |
284d8f55 | 1480 | |
5b4a0ec0 | 1481 | rcu_read_lock(); |
bec39940 | 1482 | count = lttng_ht_get_count(ust_app_ht); |
5b4a0ec0 | 1483 | rcu_read_unlock(); |
284d8f55 | 1484 | |
5b4a0ec0 | 1485 | return count; |
284d8f55 DG |
1486 | } |
1487 | ||
5b4a0ec0 DG |
1488 | /* |
1489 | * Fill events array with all events name of all registered apps. | |
1490 | */ | |
1491 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1492 | { |
5b4a0ec0 DG |
1493 | int ret, handle; |
1494 | size_t nbmem, count = 0; | |
bec39940 | 1495 | struct lttng_ht_iter iter; |
5b4a0ec0 DG |
1496 | struct ust_app *app; |
1497 | struct lttng_event *tmp; | |
421cb601 | 1498 | |
5b4a0ec0 DG |
1499 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1500 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1501 | if (tmp == NULL) { | |
1502 | PERROR("zmalloc ust app events"); | |
1503 | ret = -ENOMEM; | |
421cb601 DG |
1504 | goto error; |
1505 | } | |
1506 | ||
5b4a0ec0 | 1507 | rcu_read_lock(); |
421cb601 | 1508 | |
852d0037 | 1509 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
90eaa0d2 | 1510 | struct lttng_ust_tracepoint_iter uiter; |
ac3bd9c0 | 1511 | |
e0c7ec2b DG |
1512 | if (!app->compatible) { |
1513 | /* | |
1514 | * TODO: In time, we should notice the caller of this error by | |
1515 | * telling him that this is a version error. | |
1516 | */ | |
1517 | continue; | |
1518 | } | |
852d0037 | 1519 | handle = ustctl_tracepoint_list(app->sock); |
5b4a0ec0 DG |
1520 | if (handle < 0) { |
1521 | ERR("UST app list events getting handle failed for app pid %d", | |
852d0037 | 1522 | app->pid); |
5b4a0ec0 DG |
1523 | continue; |
1524 | } | |
421cb601 | 1525 | |
852d0037 | 1526 | while ((ret = ustctl_tracepoint_list_get(app->sock, handle, |
90eaa0d2 | 1527 | &uiter)) != -ENOENT) { |
815564d8 MD |
1528 | if (count >= nbmem) { |
1529 | DBG2("Reallocating event list from %zu to %zu entries", nbmem, | |
1530 | 2 * nbmem); | |
1531 | nbmem *= 2; | |
2f221590 | 1532 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event)); |
5b4a0ec0 DG |
1533 | if (tmp == NULL) { |
1534 | PERROR("realloc ust app events"); | |
1535 | ret = -ENOMEM; | |
1536 | goto rcu_error; | |
1537 | } | |
1538 | } | |
90eaa0d2 | 1539 | memcpy(tmp[count].name, uiter.name, LTTNG_UST_SYM_NAME_LEN); |
8005f29a | 1540 | tmp[count].loglevel = uiter.loglevel; |
6775595e | 1541 | tmp[count].type = (enum lttng_event_type) LTTNG_UST_TRACEPOINT; |
852d0037 | 1542 | tmp[count].pid = app->pid; |
5b4a0ec0 DG |
1543 | tmp[count].enabled = -1; |
1544 | count++; | |
421cb601 | 1545 | } |
421cb601 DG |
1546 | } |
1547 | ||
5b4a0ec0 DG |
1548 | ret = count; |
1549 | *events = tmp; | |
421cb601 | 1550 | |
5b4a0ec0 | 1551 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1552 | |
5b4a0ec0 DG |
1553 | rcu_error: |
1554 | rcu_read_unlock(); | |
421cb601 | 1555 | error: |
5b4a0ec0 | 1556 | return ret; |
421cb601 DG |
1557 | } |
1558 | ||
f37d259d MD |
1559 | /* |
1560 | * Fill events array with all events name of all registered apps. | |
1561 | */ | |
1562 | int ust_app_list_event_fields(struct lttng_event_field **fields) | |
1563 | { | |
1564 | int ret, handle; | |
1565 | size_t nbmem, count = 0; | |
1566 | struct lttng_ht_iter iter; | |
1567 | struct ust_app *app; | |
1568 | struct lttng_event_field *tmp; | |
1569 | ||
1570 | nbmem = UST_APP_EVENT_LIST_SIZE; | |
1571 | tmp = zmalloc(nbmem * sizeof(struct lttng_event_field)); | |
1572 | if (tmp == NULL) { | |
1573 | PERROR("zmalloc ust app event fields"); | |
1574 | ret = -ENOMEM; | |
1575 | goto error; | |
1576 | } | |
1577 | ||
1578 | rcu_read_lock(); | |
1579 | ||
1580 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { | |
1581 | struct lttng_ust_field_iter uiter; | |
1582 | ||
1583 | if (!app->compatible) { | |
1584 | /* | |
1585 | * TODO: In time, we should notice the caller of this error by | |
1586 | * telling him that this is a version error. | |
1587 | */ | |
1588 | continue; | |
1589 | } | |
1590 | handle = ustctl_tracepoint_field_list(app->sock); | |
1591 | if (handle < 0) { | |
1592 | ERR("UST app list event fields getting handle failed for app pid %d", | |
1593 | app->pid); | |
1594 | continue; | |
1595 | } | |
1596 | ||
1597 | while ((ret = ustctl_tracepoint_field_list_get(app->sock, handle, | |
1598 | &uiter)) != -ENOENT) { | |
1599 | if (count >= nbmem) { | |
1600 | DBG2("Reallocating event field list from %zu to %zu entries", nbmem, | |
1601 | 2 * nbmem); | |
1602 | nbmem *= 2; | |
1603 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event_field)); | |
1604 | if (tmp == NULL) { | |
1605 | PERROR("realloc ust app event fields"); | |
1606 | ret = -ENOMEM; | |
1607 | goto rcu_error; | |
1608 | } | |
1609 | } | |
f37d259d MD |
1610 | |
1611 | memcpy(tmp[count].field_name, uiter.field_name, LTTNG_UST_SYM_NAME_LEN); | |
1612 | tmp[count].type = uiter.type; | |
1613 | ||
1614 | memcpy(tmp[count].event.name, uiter.event_name, LTTNG_UST_SYM_NAME_LEN); | |
1615 | tmp[count].event.loglevel = uiter.loglevel; | |
1616 | tmp[count].event.type = LTTNG_UST_TRACEPOINT; | |
1617 | tmp[count].event.pid = app->pid; | |
1618 | tmp[count].event.enabled = -1; | |
1619 | count++; | |
1620 | } | |
1621 | } | |
1622 | ||
1623 | ret = count; | |
1624 | *fields = tmp; | |
1625 | ||
1626 | DBG2("UST app list event fields done (%zu events)", count); | |
1627 | ||
1628 | rcu_error: | |
1629 | rcu_read_unlock(); | |
1630 | error: | |
1631 | return ret; | |
1632 | } | |
1633 | ||
5b4a0ec0 DG |
1634 | /* |
1635 | * Free and clean all traceable apps of the global list. | |
1636 | */ | |
1637 | void ust_app_clean_list(void) | |
421cb601 | 1638 | { |
5b4a0ec0 | 1639 | int ret; |
bec39940 DG |
1640 | struct lttng_ht_iter iter; |
1641 | struct lttng_ht_node_ulong *node; | |
421cb601 | 1642 | |
5b4a0ec0 | 1643 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1644 | |
5b4a0ec0 | 1645 | rcu_read_lock(); |
421cb601 | 1646 | |
bec39940 DG |
1647 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, node, node) { |
1648 | ret = lttng_ht_del(ust_app_ht, &iter); | |
525b0740 | 1649 | assert(!ret); |
bec39940 | 1650 | call_rcu(&node->head, delete_ust_app_rcu); |
421cb601 DG |
1651 | } |
1652 | ||
852d0037 DG |
1653 | /* Cleanup socket hash table */ |
1654 | cds_lfht_for_each_entry(ust_app_ht_by_sock->ht, &iter.iter, node, node) { | |
1655 | ret = lttng_ht_del(ust_app_ht_by_sock, &iter); | |
bec39940 DG |
1656 | assert(!ret); |
1657 | } | |
852d0037 | 1658 | |
bec39940 | 1659 | /* Destroy is done only when the ht is empty */ |
852d0037 DG |
1660 | lttng_ht_destroy(ust_app_ht); |
1661 | lttng_ht_destroy(ust_app_ht_by_sock); | |
421cb601 | 1662 | |
5b4a0ec0 DG |
1663 | rcu_read_unlock(); |
1664 | } | |
1665 | ||
1666 | /* | |
1667 | * Init UST app hash table. | |
1668 | */ | |
1669 | void ust_app_ht_alloc(void) | |
1670 | { | |
bec39940 | 1671 | ust_app_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
852d0037 | 1672 | ust_app_ht_by_sock = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
421cb601 DG |
1673 | } |
1674 | ||
78f0bacd DG |
1675 | /* |
1676 | * For a specific UST session, disable the channel for all registered apps. | |
1677 | */ | |
35a9059d | 1678 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1679 | struct ltt_ust_channel *uchan) |
1680 | { | |
1681 | int ret = 0; | |
bec39940 DG |
1682 | struct lttng_ht_iter iter; |
1683 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1684 | struct ust_app *app; |
1685 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1686 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1687 | |
1688 | if (usess == NULL || uchan == NULL) { | |
1689 | ERR("Disabling UST global channel with NULL values"); | |
1690 | ret = -1; | |
1691 | goto error; | |
1692 | } | |
1693 | ||
a991f516 MD |
1694 | DBG2("UST app disabling channel %s from global domain for session id %d", |
1695 | uchan->name, usess->id); | |
78f0bacd DG |
1696 | |
1697 | rcu_read_lock(); | |
1698 | ||
1699 | /* For every registered applications */ | |
852d0037 | 1700 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
bec39940 | 1701 | struct lttng_ht_iter uiter; |
e0c7ec2b DG |
1702 | if (!app->compatible) { |
1703 | /* | |
1704 | * TODO: In time, we should notice the caller of this error by | |
1705 | * telling him that this is a version error. | |
1706 | */ | |
1707 | continue; | |
1708 | } | |
78f0bacd DG |
1709 | ua_sess = lookup_session_by_app(usess, app); |
1710 | if (ua_sess == NULL) { | |
1711 | continue; | |
1712 | } | |
1713 | ||
8535a6d9 | 1714 | /* Get channel */ |
bec39940 DG |
1715 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1716 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
8535a6d9 DG |
1717 | /* If the session if found for the app, the channel must be there */ |
1718 | assert(ua_chan_node); | |
1719 | ||
1720 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1721 | /* The channel must not be already disabled */ | |
1722 | assert(ua_chan->enabled == 1); | |
1723 | ||
1724 | /* Disable channel onto application */ | |
1725 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1726 | if (ret < 0) { |
1727 | /* XXX: We might want to report this error at some point... */ | |
1728 | continue; | |
1729 | } | |
1730 | } | |
1731 | ||
1732 | rcu_read_unlock(); | |
1733 | ||
1734 | error: | |
1735 | return ret; | |
1736 | } | |
1737 | ||
1738 | /* | |
1739 | * For a specific UST session, enable the channel for all registered apps. | |
1740 | */ | |
35a9059d | 1741 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1742 | struct ltt_ust_channel *uchan) |
1743 | { | |
1744 | int ret = 0; | |
bec39940 | 1745 | struct lttng_ht_iter iter; |
78f0bacd DG |
1746 | struct ust_app *app; |
1747 | struct ust_app_session *ua_sess; | |
1748 | ||
1749 | if (usess == NULL || uchan == NULL) { | |
1750 | ERR("Adding UST global channel to NULL values"); | |
1751 | ret = -1; | |
1752 | goto error; | |
1753 | } | |
1754 | ||
a991f516 MD |
1755 | DBG2("UST app enabling channel %s to global domain for session id %d", |
1756 | uchan->name, usess->id); | |
78f0bacd DG |
1757 | |
1758 | rcu_read_lock(); | |
1759 | ||
1760 | /* For every registered applications */ | |
852d0037 | 1761 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1762 | if (!app->compatible) { |
1763 | /* | |
1764 | * TODO: In time, we should notice the caller of this error by | |
1765 | * telling him that this is a version error. | |
1766 | */ | |
1767 | continue; | |
1768 | } | |
78f0bacd DG |
1769 | ua_sess = lookup_session_by_app(usess, app); |
1770 | if (ua_sess == NULL) { | |
1771 | continue; | |
1772 | } | |
1773 | ||
1774 | /* Enable channel onto application */ | |
1775 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1776 | if (ret < 0) { | |
1777 | /* XXX: We might want to report this error at some point... */ | |
1778 | continue; | |
1779 | } | |
1780 | } | |
1781 | ||
1782 | rcu_read_unlock(); | |
1783 | ||
1784 | error: | |
1785 | return ret; | |
1786 | } | |
1787 | ||
b0a40d28 DG |
1788 | /* |
1789 | * Disable an event in a channel and for a specific session. | |
1790 | */ | |
35a9059d DG |
1791 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
1792 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
1793 | { |
1794 | int ret = 0; | |
bec39940 DG |
1795 | struct lttng_ht_iter iter, uiter; |
1796 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
b0a40d28 DG |
1797 | struct ust_app *app; |
1798 | struct ust_app_session *ua_sess; | |
1799 | struct ust_app_channel *ua_chan; | |
1800 | struct ust_app_event *ua_event; | |
1801 | ||
1802 | DBG("UST app disabling event %s for all apps in channel " | |
a991f516 | 1803 | "%s for session id %d", uevent->attr.name, uchan->name, usess->id); |
b0a40d28 DG |
1804 | |
1805 | rcu_read_lock(); | |
1806 | ||
1807 | /* For all registered applications */ | |
852d0037 | 1808 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1809 | if (!app->compatible) { |
1810 | /* | |
1811 | * TODO: In time, we should notice the caller of this error by | |
1812 | * telling him that this is a version error. | |
1813 | */ | |
1814 | continue; | |
1815 | } | |
b0a40d28 DG |
1816 | ua_sess = lookup_session_by_app(usess, app); |
1817 | if (ua_sess == NULL) { | |
1818 | /* Next app */ | |
1819 | continue; | |
1820 | } | |
1821 | ||
1822 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1823 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1824 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 | 1825 | if (ua_chan_node == NULL) { |
a991f516 | 1826 | DBG2("Channel %s not found in session id %d for app pid %d." |
852d0037 | 1827 | "Skipping", uchan->name, usess->id, app->pid); |
b0a40d28 DG |
1828 | continue; |
1829 | } | |
1830 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1831 | ||
bec39940 DG |
1832 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
1833 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 DG |
1834 | if (ua_event_node == NULL) { |
1835 | DBG2("Event %s not found in channel %s for app pid %d." | |
852d0037 | 1836 | "Skipping", uevent->attr.name, uchan->name, app->pid); |
b0a40d28 DG |
1837 | continue; |
1838 | } | |
1839 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1840 | ||
7f79d3a1 | 1841 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
b0a40d28 DG |
1842 | if (ret < 0) { |
1843 | /* XXX: Report error someday... */ | |
1844 | continue; | |
1845 | } | |
1846 | } | |
1847 | ||
1848 | rcu_read_unlock(); | |
1849 | ||
1850 | return ret; | |
1851 | } | |
1852 | ||
9730260e | 1853 | /* |
edb67388 | 1854 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
1855 | * registered apps. |
1856 | */ | |
35a9059d | 1857 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
1858 | struct ltt_ust_channel *uchan) |
1859 | { | |
1860 | int ret = 0; | |
bec39940 DG |
1861 | struct lttng_ht_iter iter, uiter; |
1862 | struct lttng_ht_node_str *ua_chan_node; | |
9730260e DG |
1863 | struct ust_app *app; |
1864 | struct ust_app_session *ua_sess; | |
1865 | struct ust_app_channel *ua_chan; | |
1866 | struct ust_app_event *ua_event; | |
1867 | ||
1868 | DBG("UST app disabling all event for all apps in channel " | |
a991f516 | 1869 | "%s for session id %d", uchan->name, usess->id); |
9730260e DG |
1870 | |
1871 | rcu_read_lock(); | |
1872 | ||
1873 | /* For all registered applications */ | |
852d0037 | 1874 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1875 | if (!app->compatible) { |
1876 | /* | |
1877 | * TODO: In time, we should notice the caller of this error by | |
1878 | * telling him that this is a version error. | |
1879 | */ | |
1880 | continue; | |
1881 | } | |
9730260e | 1882 | ua_sess = lookup_session_by_app(usess, app); |
edb67388 DG |
1883 | /* If ua_sess is NULL, there is a code flow error */ |
1884 | assert(ua_sess); | |
9730260e DG |
1885 | |
1886 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1887 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1888 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1889 | /* If the channel is not found, there is a code flow error */ |
1890 | assert(ua_chan_node); | |
1891 | ||
9730260e DG |
1892 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1893 | ||
1894 | /* Disable each events of channel */ | |
bec39940 DG |
1895 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
1896 | node.node) { | |
7f79d3a1 | 1897 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
9730260e DG |
1898 | if (ret < 0) { |
1899 | /* XXX: Report error someday... */ | |
1900 | continue; | |
1901 | } | |
1902 | } | |
1903 | } | |
1904 | ||
1905 | rcu_read_unlock(); | |
1906 | ||
1907 | return ret; | |
1908 | } | |
1909 | ||
421cb601 | 1910 | /* |
5b4a0ec0 | 1911 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1912 | */ |
35a9059d | 1913 | int ust_app_create_channel_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1914 | struct ltt_ust_channel *uchan) |
1915 | { | |
bec39940 | 1916 | struct lttng_ht_iter iter; |
48842b30 DG |
1917 | struct ust_app *app; |
1918 | struct ust_app_session *ua_sess; | |
1919 | struct ust_app_channel *ua_chan; | |
1920 | ||
fc34caaa DG |
1921 | /* Very wrong code flow */ |
1922 | assert(usess); | |
1923 | assert(uchan); | |
421cb601 | 1924 | |
a991f516 MD |
1925 | DBG2("UST app adding channel %s to global domain for session id %d", |
1926 | uchan->name, usess->id); | |
48842b30 DG |
1927 | |
1928 | rcu_read_lock(); | |
421cb601 | 1929 | |
5b4a0ec0 | 1930 | /* For every registered applications */ |
852d0037 | 1931 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1932 | if (!app->compatible) { |
1933 | /* | |
1934 | * TODO: In time, we should notice the caller of this error by | |
1935 | * telling him that this is a version error. | |
1936 | */ | |
1937 | continue; | |
1938 | } | |
edb67388 DG |
1939 | /* |
1940 | * Create session on the tracer side and add it to app session HT. Note | |
1941 | * that if session exist, it will simply return a pointer to the ust | |
1942 | * app session. | |
1943 | */ | |
421cb601 | 1944 | ua_sess = create_ust_app_session(usess, app); |
509cbaf8 | 1945 | if (ua_sess == NULL) { |
915d047c | 1946 | /* The malloc() failed. */ |
fc34caaa | 1947 | goto error; |
915d047c DG |
1948 | } else if (ua_sess == (void *) -1UL) { |
1949 | /* The application's socket is not valid. Contiuing */ | |
1950 | continue; | |
48842b30 DG |
1951 | } |
1952 | ||
421cb601 DG |
1953 | /* Create channel onto application */ |
1954 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1955 | if (ua_chan == NULL) { | |
fc34caaa DG |
1956 | /* Major problem here and it's maybe the tracer or malloc() */ |
1957 | goto error; | |
48842b30 | 1958 | } |
48842b30 | 1959 | } |
5b4a0ec0 | 1960 | |
48842b30 DG |
1961 | rcu_read_unlock(); |
1962 | ||
fc34caaa DG |
1963 | return 0; |
1964 | ||
421cb601 | 1965 | error: |
fc34caaa | 1966 | return -1; |
48842b30 DG |
1967 | } |
1968 | ||
5b4a0ec0 | 1969 | /* |
edb67388 | 1970 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 1971 | */ |
35a9059d | 1972 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1973 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1974 | { | |
1975 | int ret = 0; | |
bec39940 DG |
1976 | struct lttng_ht_iter iter, uiter; |
1977 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
48842b30 DG |
1978 | struct ust_app *app; |
1979 | struct ust_app_session *ua_sess; | |
1980 | struct ust_app_channel *ua_chan; | |
1981 | struct ust_app_event *ua_event; | |
48842b30 | 1982 | |
a991f516 MD |
1983 | DBG("UST app enabling event %s for all apps for session id %d", |
1984 | uevent->attr.name, usess->id); | |
48842b30 | 1985 | |
edb67388 DG |
1986 | /* |
1987 | * NOTE: At this point, this function is called only if the session and | |
1988 | * channel passed are already created for all apps. and enabled on the | |
1989 | * tracer also. | |
1990 | */ | |
1991 | ||
48842b30 | 1992 | rcu_read_lock(); |
421cb601 DG |
1993 | |
1994 | /* For all registered applications */ | |
852d0037 | 1995 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1996 | if (!app->compatible) { |
1997 | /* | |
1998 | * TODO: In time, we should notice the caller of this error by | |
1999 | * telling him that this is a version error. | |
2000 | */ | |
2001 | continue; | |
2002 | } | |
edb67388 DG |
2003 | ua_sess = lookup_session_by_app(usess, app); |
2004 | /* If ua_sess is NULL, there is a code flow error */ | |
2005 | assert(ua_sess); | |
ba767faf | 2006 | |
edb67388 | 2007 | /* Lookup channel in the ust app session */ |
bec39940 DG |
2008 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2009 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
2010 | /* If the channel is not found, there is a code flow error */ |
2011 | assert(ua_chan_node); | |
2012 | ||
2013 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2014 | ||
bec39940 DG |
2015 | lttng_ht_lookup(ua_chan->events, (void*)uevent->attr.name, &uiter); |
2016 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
35a9059d | 2017 | if (ua_event_node == NULL) { |
7f79d3a1 | 2018 | DBG3("UST app enable event %s not found for app PID %d." |
852d0037 | 2019 | "Skipping app", uevent->attr.name, app->pid); |
35a9059d DG |
2020 | continue; |
2021 | } | |
2022 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2023 | ||
2024 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2025 | if (ret < 0) { | |
7f79d3a1 | 2026 | goto error; |
48842b30 | 2027 | } |
edb67388 DG |
2028 | } |
2029 | ||
7f79d3a1 | 2030 | error: |
edb67388 | 2031 | rcu_read_unlock(); |
edb67388 DG |
2032 | return ret; |
2033 | } | |
2034 | ||
2035 | /* | |
2036 | * For a specific existing UST session and UST channel, creates the event for | |
2037 | * all registered apps. | |
2038 | */ | |
35a9059d | 2039 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
2040 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
2041 | { | |
2042 | int ret = 0; | |
bec39940 DG |
2043 | struct lttng_ht_iter iter, uiter; |
2044 | struct lttng_ht_node_str *ua_chan_node; | |
edb67388 DG |
2045 | struct ust_app *app; |
2046 | struct ust_app_session *ua_sess; | |
2047 | struct ust_app_channel *ua_chan; | |
2048 | ||
a991f516 MD |
2049 | DBG("UST app creating event %s for all apps for session id %d", |
2050 | uevent->attr.name, usess->id); | |
edb67388 | 2051 | |
edb67388 DG |
2052 | rcu_read_lock(); |
2053 | ||
2054 | /* For all registered applications */ | |
852d0037 | 2055 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2056 | if (!app->compatible) { |
2057 | /* | |
2058 | * TODO: In time, we should notice the caller of this error by | |
2059 | * telling him that this is a version error. | |
2060 | */ | |
2061 | continue; | |
2062 | } | |
edb67388 DG |
2063 | ua_sess = lookup_session_by_app(usess, app); |
2064 | /* If ua_sess is NULL, there is a code flow error */ | |
2065 | assert(ua_sess); | |
48842b30 DG |
2066 | |
2067 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2068 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2069 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
2070 | /* If the channel is not found, there is a code flow error */ |
2071 | assert(ua_chan_node); | |
2072 | ||
48842b30 DG |
2073 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
2074 | ||
edb67388 DG |
2075 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
2076 | if (ret < 0) { | |
fc34caaa DG |
2077 | if (ret != -EEXIST) { |
2078 | /* Possible value at this point: -ENOMEM. If so, we stop! */ | |
2079 | break; | |
2080 | } | |
2081 | DBG2("UST app event %s already exist on app PID %d", | |
852d0037 | 2082 | uevent->attr.name, app->pid); |
5b4a0ec0 | 2083 | continue; |
48842b30 | 2084 | } |
48842b30 | 2085 | } |
5b4a0ec0 | 2086 | |
48842b30 DG |
2087 | rcu_read_unlock(); |
2088 | ||
2089 | return ret; | |
2090 | } | |
2091 | ||
5b4a0ec0 DG |
2092 | /* |
2093 | * Start tracing for a specific UST session and app. | |
2094 | */ | |
421cb601 | 2095 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
2096 | { |
2097 | int ret = 0; | |
bec39940 | 2098 | struct lttng_ht_iter iter; |
48842b30 DG |
2099 | struct ust_app_session *ua_sess; |
2100 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 2101 | struct ltt_ust_stream *ustream; |
7753dea8 | 2102 | int consumerd_fd; |
48842b30 | 2103 | |
852d0037 | 2104 | DBG("Starting tracing for ust app pid %d", app->pid); |
5cf5d0e7 | 2105 | |
509cbaf8 MD |
2106 | rcu_read_lock(); |
2107 | ||
e0c7ec2b DG |
2108 | if (!app->compatible) { |
2109 | goto end; | |
2110 | } | |
2111 | ||
421cb601 DG |
2112 | ua_sess = lookup_session_by_app(usess, app); |
2113 | if (ua_sess == NULL) { | |
509cbaf8 | 2114 | goto error_rcu_unlock; |
421cb601 | 2115 | } |
48842b30 | 2116 | |
aea829b3 DG |
2117 | /* Upon restart, we skip the setup, already done */ |
2118 | if (ua_sess->started) { | |
8be98f9a | 2119 | goto skip_setup; |
aea829b3 | 2120 | } |
8be98f9a | 2121 | |
f848c3eb DG |
2122 | /* Indicate that the session has been started once */ |
2123 | ua_sess->started = 1; | |
2124 | ||
421cb601 DG |
2125 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
2126 | if (ret < 0) { | |
509cbaf8 | 2127 | goto error_rcu_unlock; |
421cb601 | 2128 | } |
48842b30 | 2129 | |
421cb601 | 2130 | /* For each channel */ |
bec39940 DG |
2131 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2132 | node.node) { | |
421cb601 DG |
2133 | /* Create all streams */ |
2134 | while (1) { | |
5b4a0ec0 | 2135 | /* Create UST stream */ |
421cb601 DG |
2136 | ustream = zmalloc(sizeof(*ustream)); |
2137 | if (ustream == NULL) { | |
2138 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 2139 | goto error_rcu_unlock; |
421cb601 | 2140 | } |
48842b30 | 2141 | |
4063050c MD |
2142 | /* We are going to receive 2 fds, we need to reserve them. */ |
2143 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
2144 | if (ret < 0) { | |
2145 | ERR("Exhausted number of available FD upon stream create"); | |
2146 | free(ustream); | |
2147 | goto error_rcu_unlock; | |
2148 | } | |
852d0037 | 2149 | ret = ustctl_create_stream(app->sock, ua_chan->obj, |
421cb601 | 2150 | &ustream->obj); |
48842b30 | 2151 | if (ret < 0) { |
421cb601 | 2152 | /* Got all streams */ |
4063050c | 2153 | lttng_fd_put(LTTNG_FD_APPS, 2); |
a2c0da86 | 2154 | free(ustream); |
421cb601 | 2155 | break; |
48842b30 | 2156 | } |
421cb601 | 2157 | ustream->handle = ustream->obj->handle; |
48842b30 | 2158 | |
421cb601 DG |
2159 | /* Order is important */ |
2160 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
00e2e675 DG |
2161 | ret = snprintf(ustream->name, sizeof(ustream->name), "%s_%u", |
2162 | ua_chan->name, ua_chan->streams.count++); | |
aba8e916 DG |
2163 | if (ret < 0) { |
2164 | PERROR("asprintf UST create stream"); | |
a2c0da86 MD |
2165 | /* |
2166 | * XXX what should we do here with the | |
2167 | * stream ? | |
2168 | */ | |
421cb601 | 2169 | continue; |
aba8e916 | 2170 | } |
00e2e675 DG |
2171 | DBG2("UST stream %d ready (handle: %d)", ua_chan->streams.count, |
2172 | ustream->handle); | |
421cb601 | 2173 | } |
421cb601 | 2174 | } |
aba8e916 | 2175 | |
7753dea8 MD |
2176 | switch (app->bits_per_long) { |
2177 | case 64: | |
2178 | consumerd_fd = ust_consumerd64_fd; | |
2179 | break; | |
2180 | case 32: | |
2181 | consumerd_fd = ust_consumerd32_fd; | |
2182 | break; | |
2183 | default: | |
2184 | ret = -EINVAL; | |
2185 | goto error_rcu_unlock; | |
2186 | } | |
aea829b3 | 2187 | |
421cb601 | 2188 | /* Setup UST consumer socket and send fds to it */ |
00e2e675 | 2189 | ret = ust_consumer_send_session(consumerd_fd, ua_sess, usess->consumer); |
421cb601 | 2190 | if (ret < 0) { |
509cbaf8 | 2191 | goto error_rcu_unlock; |
421cb601 | 2192 | } |
48842b30 | 2193 | |
8be98f9a | 2194 | skip_setup: |
421cb601 | 2195 | /* This start the UST tracing */ |
852d0037 | 2196 | ret = ustctl_start_session(app->sock, ua_sess->handle); |
421cb601 | 2197 | if (ret < 0) { |
852d0037 | 2198 | ERR("Error starting tracing for app pid: %d", app->pid); |
509cbaf8 | 2199 | goto error_rcu_unlock; |
421cb601 | 2200 | } |
5b4a0ec0 | 2201 | |
421cb601 | 2202 | /* Quiescent wait after starting trace */ |
852d0037 | 2203 | ustctl_wait_quiescent(app->sock); |
48842b30 | 2204 | |
e0c7ec2b DG |
2205 | end: |
2206 | rcu_read_unlock(); | |
421cb601 | 2207 | return 0; |
48842b30 | 2208 | |
509cbaf8 MD |
2209 | error_rcu_unlock: |
2210 | rcu_read_unlock(); | |
421cb601 DG |
2211 | return -1; |
2212 | } | |
48842b30 | 2213 | |
8be98f9a MD |
2214 | /* |
2215 | * Stop tracing for a specific UST session and app. | |
2216 | */ | |
2217 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2218 | { | |
2219 | int ret = 0; | |
bec39940 | 2220 | struct lttng_ht_iter iter; |
8be98f9a | 2221 | struct ust_app_session *ua_sess; |
6d3686da | 2222 | struct ust_app_channel *ua_chan; |
8be98f9a | 2223 | |
852d0037 | 2224 | DBG("Stopping tracing for ust app pid %d", app->pid); |
8be98f9a MD |
2225 | |
2226 | rcu_read_lock(); | |
2227 | ||
e0c7ec2b DG |
2228 | if (!app->compatible) { |
2229 | goto end; | |
2230 | } | |
2231 | ||
8be98f9a MD |
2232 | ua_sess = lookup_session_by_app(usess, app); |
2233 | if (ua_sess == NULL) { | |
2234 | /* Only malloc can failed so something is really wrong */ | |
2235 | goto error_rcu_unlock; | |
2236 | } | |
2237 | ||
9bc07046 DG |
2238 | /* |
2239 | * If started = 0, it means that stop trace has been called for a session | |
2240 | * that was never started. This is a code flow error and should never | |
2241 | * happen. | |
2242 | */ | |
2243 | assert(ua_sess->started == 1); | |
7db205b5 | 2244 | |
9d6c7d3f | 2245 | /* This inhibits UST tracing */ |
852d0037 | 2246 | ret = ustctl_stop_session(app->sock, ua_sess->handle); |
9d6c7d3f | 2247 | if (ret < 0) { |
852d0037 | 2248 | ERR("Error stopping tracing for app pid: %d", app->pid); |
9d6c7d3f DG |
2249 | goto error_rcu_unlock; |
2250 | } | |
2251 | ||
2252 | /* Quiescent wait after stopping trace */ | |
852d0037 | 2253 | ustctl_wait_quiescent(app->sock); |
9d6c7d3f DG |
2254 | |
2255 | /* Flushing buffers */ | |
bec39940 DG |
2256 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2257 | node.node) { | |
852d0037 | 2258 | ret = ustctl_sock_flush_buffer(app->sock, ua_chan->obj); |
8be98f9a | 2259 | if (ret < 0) { |
7db205b5 | 2260 | ERR("UST app PID %d channel %s flush failed with ret %d", |
852d0037 | 2261 | app->pid, ua_chan->name, ret); |
6d3686da DG |
2262 | /* Continuing flushing all buffers */ |
2263 | continue; | |
8be98f9a MD |
2264 | } |
2265 | } | |
8be98f9a | 2266 | |
90d97d10 | 2267 | /* Flush all buffers before stopping */ |
852d0037 | 2268 | ret = ustctl_sock_flush_buffer(app->sock, ua_sess->metadata->obj); |
90d97d10 | 2269 | if (ret < 0) { |
852d0037 | 2270 | ERR("UST app PID %d metadata flush failed with ret %d", app->pid, |
7db205b5 | 2271 | ret); |
90d97d10 DG |
2272 | } |
2273 | ||
7db205b5 DG |
2274 | end: |
2275 | rcu_read_unlock(); | |
8be98f9a MD |
2276 | return 0; |
2277 | ||
2278 | error_rcu_unlock: | |
2279 | rcu_read_unlock(); | |
2280 | return -1; | |
2281 | } | |
2282 | ||
84cd17c6 MD |
2283 | /* |
2284 | * Destroy a specific UST session in apps. | |
2285 | */ | |
2286 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2287 | { | |
2288 | struct ust_app_session *ua_sess; | |
2289 | struct lttng_ust_object_data obj; | |
bec39940 DG |
2290 | struct lttng_ht_iter iter; |
2291 | struct lttng_ht_node_ulong *node; | |
525b0740 | 2292 | int ret; |
84cd17c6 | 2293 | |
852d0037 | 2294 | DBG("Destroy tracing for ust app pid %d", app->pid); |
84cd17c6 MD |
2295 | |
2296 | rcu_read_lock(); | |
2297 | ||
e0c7ec2b DG |
2298 | if (!app->compatible) { |
2299 | goto end; | |
2300 | } | |
2301 | ||
84cd17c6 | 2302 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 2303 | node = lttng_ht_iter_get_node_ulong(&iter); |
84cd17c6 MD |
2304 | if (node == NULL) { |
2305 | /* Only malloc can failed so something is really wrong */ | |
2306 | goto error_rcu_unlock; | |
2307 | } | |
2308 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
bec39940 | 2309 | ret = lttng_ht_del(app->sessions, &iter); |
525b0740 | 2310 | assert(!ret); |
84cd17c6 MD |
2311 | obj.handle = ua_sess->handle; |
2312 | obj.shm_fd = -1; | |
2313 | obj.wait_fd = -1; | |
2314 | obj.memory_map_size = 0; | |
852d0037 | 2315 | ustctl_release_object(app->sock, &obj); |
84cd17c6 | 2316 | |
852d0037 | 2317 | delete_ust_app_session(app->sock, ua_sess); |
7db205b5 | 2318 | |
84cd17c6 | 2319 | /* Quiescent wait after stopping trace */ |
852d0037 | 2320 | ustctl_wait_quiescent(app->sock); |
84cd17c6 | 2321 | |
e0c7ec2b DG |
2322 | end: |
2323 | rcu_read_unlock(); | |
84cd17c6 MD |
2324 | return 0; |
2325 | ||
2326 | error_rcu_unlock: | |
2327 | rcu_read_unlock(); | |
2328 | return -1; | |
2329 | } | |
2330 | ||
5b4a0ec0 DG |
2331 | /* |
2332 | * Start tracing for the UST session. | |
2333 | */ | |
421cb601 DG |
2334 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
2335 | { | |
2336 | int ret = 0; | |
bec39940 | 2337 | struct lttng_ht_iter iter; |
421cb601 | 2338 | struct ust_app *app; |
48842b30 | 2339 | |
421cb601 DG |
2340 | DBG("Starting all UST traces"); |
2341 | ||
2342 | rcu_read_lock(); | |
421cb601 | 2343 | |
852d0037 | 2344 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
421cb601 | 2345 | ret = ust_app_start_trace(usess, app); |
48842b30 | 2346 | if (ret < 0) { |
5b4a0ec0 DG |
2347 | /* Continue to next apps even on error */ |
2348 | continue; | |
48842b30 | 2349 | } |
48842b30 | 2350 | } |
5b4a0ec0 | 2351 | |
48842b30 DG |
2352 | rcu_read_unlock(); |
2353 | ||
2354 | return 0; | |
2355 | } | |
487cf67c | 2356 | |
8be98f9a MD |
2357 | /* |
2358 | * Start tracing for the UST session. | |
2359 | */ | |
2360 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
2361 | { | |
2362 | int ret = 0; | |
bec39940 | 2363 | struct lttng_ht_iter iter; |
8be98f9a MD |
2364 | struct ust_app *app; |
2365 | ||
2366 | DBG("Stopping all UST traces"); | |
2367 | ||
2368 | rcu_read_lock(); | |
2369 | ||
852d0037 | 2370 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
8be98f9a MD |
2371 | ret = ust_app_stop_trace(usess, app); |
2372 | if (ret < 0) { | |
2373 | /* Continue to next apps even on error */ | |
2374 | continue; | |
2375 | } | |
2376 | } | |
2377 | ||
2378 | rcu_read_unlock(); | |
2379 | ||
2380 | return 0; | |
2381 | } | |
2382 | ||
84cd17c6 MD |
2383 | /* |
2384 | * Destroy app UST session. | |
2385 | */ | |
2386 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
2387 | { | |
2388 | int ret = 0; | |
bec39940 | 2389 | struct lttng_ht_iter iter; |
84cd17c6 MD |
2390 | struct ust_app *app; |
2391 | ||
2392 | DBG("Destroy all UST traces"); | |
2393 | ||
2394 | rcu_read_lock(); | |
2395 | ||
852d0037 | 2396 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
84cd17c6 MD |
2397 | ret = ust_app_destroy_trace(usess, app); |
2398 | if (ret < 0) { | |
2399 | /* Continue to next apps even on error */ | |
2400 | continue; | |
2401 | } | |
2402 | } | |
2403 | ||
2404 | rcu_read_unlock(); | |
2405 | ||
2406 | return 0; | |
2407 | } | |
2408 | ||
5b4a0ec0 DG |
2409 | /* |
2410 | * Add channels/events from UST global domain to registered apps at sock. | |
2411 | */ | |
487cf67c DG |
2412 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
2413 | { | |
55c54cce | 2414 | int ret = 0; |
727d5404 | 2415 | struct lttng_ht_iter iter, uiter, iter_ctx; |
487cf67c DG |
2416 | struct ust_app *app; |
2417 | struct ust_app_session *ua_sess; | |
2418 | struct ust_app_channel *ua_chan; | |
2419 | struct ust_app_event *ua_event; | |
727d5404 | 2420 | struct ust_app_ctx *ua_ctx; |
1f3580c7 DG |
2421 | |
2422 | if (usess == NULL) { | |
5b4a0ec0 | 2423 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
2424 | goto error; |
2425 | } | |
2426 | ||
a991f516 MD |
2427 | DBG2("UST app global update for app sock %d for session id %d", sock, |
2428 | usess->id); | |
487cf67c | 2429 | |
284d8f55 DG |
2430 | rcu_read_lock(); |
2431 | ||
487cf67c DG |
2432 | app = find_app_by_sock(sock); |
2433 | if (app == NULL) { | |
2434 | ERR("Failed to update app sock %d", sock); | |
2435 | goto error; | |
2436 | } | |
2437 | ||
e0c7ec2b DG |
2438 | if (!app->compatible) { |
2439 | goto error; | |
2440 | } | |
2441 | ||
421cb601 | 2442 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 2443 | if (ua_sess == NULL) { |
487cf67c DG |
2444 | goto error; |
2445 | } | |
2446 | ||
284d8f55 DG |
2447 | /* |
2448 | * We can iterate safely here over all UST app session sicne the create ust | |
2449 | * app session above made a shadow copy of the UST global domain from the | |
2450 | * ltt ust session. | |
2451 | */ | |
bec39940 DG |
2452 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2453 | node.node) { | |
284d8f55 DG |
2454 | ret = create_ust_channel(app, ua_sess, ua_chan); |
2455 | if (ret < 0) { | |
2456 | /* FIXME: Should we quit here or continue... */ | |
2457 | continue; | |
487cf67c DG |
2458 | } |
2459 | ||
727d5404 DG |
2460 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter_ctx.iter, ua_ctx, |
2461 | node.node) { | |
2462 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
2463 | if (ret < 0) { | |
2464 | /* FIXME: Should we quit here or continue... */ | |
2465 | continue; | |
2466 | } | |
2467 | } | |
2468 | ||
2469 | ||
284d8f55 | 2470 | /* For each events */ |
bec39940 DG |
2471 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
2472 | node.node) { | |
284d8f55 DG |
2473 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
2474 | if (ret < 0) { | |
2475 | /* FIXME: Should we quit here or continue... */ | |
2476 | continue; | |
487cf67c | 2477 | } |
727d5404 DG |
2478 | |
2479 | /* Add context on events. */ | |
2480 | cds_lfht_for_each_entry(ua_event->ctx->ht, &iter_ctx.iter, | |
2481 | ua_ctx, node.node) { | |
2482 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
2483 | if (ret < 0) { | |
2484 | /* FIXME: Should we quit here or continue... */ | |
2485 | continue; | |
2486 | } | |
2487 | } | |
53a80697 MD |
2488 | ret = set_ust_event_filter(ua_event, app); |
2489 | if (ret < 0) { | |
2490 | /* FIXME: Should we quit here or continue... */ | |
2491 | continue; | |
2492 | } | |
36dc12cc | 2493 | } |
487cf67c DG |
2494 | } |
2495 | ||
36dc12cc | 2496 | if (usess->start_trace) { |
421cb601 | 2497 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 2498 | if (ret < 0) { |
36dc12cc DG |
2499 | goto error; |
2500 | } | |
2501 | ||
852d0037 | 2502 | DBG2("UST trace started for app pid %d", app->pid); |
36dc12cc DG |
2503 | } |
2504 | ||
487cf67c DG |
2505 | error: |
2506 | rcu_read_unlock(); | |
2507 | return; | |
2508 | } | |
55cc08a6 DG |
2509 | |
2510 | /* | |
2511 | * Add context to a specific channel for global UST domain. | |
2512 | */ | |
2513 | int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess, | |
2514 | struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx) | |
2515 | { | |
2516 | int ret = 0; | |
bec39940 DG |
2517 | struct lttng_ht_node_str *ua_chan_node; |
2518 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2519 | struct ust_app_channel *ua_chan = NULL; |
2520 | struct ust_app_session *ua_sess; | |
2521 | struct ust_app *app; | |
2522 | ||
2523 | rcu_read_lock(); | |
2524 | ||
852d0037 | 2525 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2526 | if (!app->compatible) { |
2527 | /* | |
2528 | * TODO: In time, we should notice the caller of this error by | |
2529 | * telling him that this is a version error. | |
2530 | */ | |
2531 | continue; | |
2532 | } | |
55cc08a6 DG |
2533 | ua_sess = lookup_session_by_app(usess, app); |
2534 | if (ua_sess == NULL) { | |
2535 | continue; | |
2536 | } | |
2537 | ||
2538 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2539 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2540 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2541 | if (ua_chan_node == NULL) { |
2542 | continue; | |
2543 | } | |
2544 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2545 | node); | |
2546 | ||
2547 | ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app); | |
2548 | if (ret < 0) { | |
2549 | continue; | |
2550 | } | |
2551 | } | |
2552 | ||
55cc08a6 DG |
2553 | rcu_read_unlock(); |
2554 | return ret; | |
2555 | } | |
2556 | ||
2557 | /* | |
2558 | * Add context to a specific event in a channel for global UST domain. | |
2559 | */ | |
2560 | int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess, | |
2561 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
2562 | struct ltt_ust_context *uctx) | |
2563 | { | |
2564 | int ret = 0; | |
bec39940 DG |
2565 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; |
2566 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2567 | struct ust_app_session *ua_sess; |
2568 | struct ust_app_event *ua_event; | |
2569 | struct ust_app_channel *ua_chan = NULL; | |
2570 | struct ust_app *app; | |
2571 | ||
2572 | rcu_read_lock(); | |
2573 | ||
852d0037 | 2574 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2575 | if (!app->compatible) { |
2576 | /* | |
2577 | * TODO: In time, we should notice the caller of this error by | |
2578 | * telling him that this is a version error. | |
2579 | */ | |
2580 | continue; | |
2581 | } | |
55cc08a6 DG |
2582 | ua_sess = lookup_session_by_app(usess, app); |
2583 | if (ua_sess == NULL) { | |
2584 | continue; | |
2585 | } | |
2586 | ||
2587 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2588 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2589 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2590 | if (ua_chan_node == NULL) { |
2591 | continue; | |
2592 | } | |
2593 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2594 | node); | |
2595 | ||
bec39940 DG |
2596 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
2597 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2598 | if (ua_event_node == NULL) { |
2599 | continue; | |
2600 | } | |
2601 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, | |
2602 | node); | |
2603 | ||
2604 | ret = create_ust_app_event_context(ua_sess, ua_event, &uctx->ctx, app); | |
2605 | if (ret < 0) { | |
2606 | continue; | |
2607 | } | |
2608 | } | |
2609 | ||
55cc08a6 DG |
2610 | rcu_read_unlock(); |
2611 | return ret; | |
2612 | } | |
76d45b40 | 2613 | |
53a80697 MD |
2614 | /* |
2615 | * Add context to a specific event in a channel for global UST domain. | |
2616 | */ | |
2617 | int ust_app_set_filter_event_glb(struct ltt_ust_session *usess, | |
2618 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
2619 | struct lttng_filter_bytecode *bytecode) | |
2620 | { | |
2621 | int ret = 0; | |
2622 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
2623 | struct lttng_ht_iter iter, uiter; | |
2624 | struct ust_app_session *ua_sess; | |
2625 | struct ust_app_event *ua_event; | |
2626 | struct ust_app_channel *ua_chan = NULL; | |
2627 | struct ust_app *app; | |
2628 | ||
2629 | rcu_read_lock(); | |
2630 | ||
2631 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { | |
2632 | if (!app->compatible) { | |
2633 | /* | |
2634 | * TODO: In time, we should notice the caller of this error by | |
2635 | * telling him that this is a version error. | |
2636 | */ | |
2637 | continue; | |
2638 | } | |
2639 | ua_sess = lookup_session_by_app(usess, app); | |
2640 | if (ua_sess == NULL) { | |
2641 | continue; | |
2642 | } | |
2643 | ||
2644 | /* Lookup channel in the ust app session */ | |
2645 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); | |
2646 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
2647 | if (ua_chan_node == NULL) { | |
2648 | continue; | |
2649 | } | |
2650 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2651 | node); | |
2652 | ||
2653 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); | |
2654 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
2655 | if (ua_event_node == NULL) { | |
2656 | continue; | |
2657 | } | |
2658 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, | |
2659 | node); | |
2660 | ||
2661 | ret = set_ust_app_event_filter(ua_sess, ua_event, bytecode, app); | |
2662 | if (ret < 0) { | |
2663 | continue; | |
2664 | } | |
2665 | } | |
2666 | ||
2667 | rcu_read_unlock(); | |
2668 | return ret; | |
2669 | } | |
2670 | ||
76d45b40 DG |
2671 | /* |
2672 | * Enable event for a channel from a UST session for a specific PID. | |
2673 | */ | |
2674 | int ust_app_enable_event_pid(struct ltt_ust_session *usess, | |
2675 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2676 | { | |
2677 | int ret = 0; | |
bec39940 DG |
2678 | struct lttng_ht_iter iter; |
2679 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
76d45b40 DG |
2680 | struct ust_app *app; |
2681 | struct ust_app_session *ua_sess; | |
2682 | struct ust_app_channel *ua_chan; | |
2683 | struct ust_app_event *ua_event; | |
2684 | ||
2685 | DBG("UST app enabling event %s for PID %d", uevent->attr.name, pid); | |
2686 | ||
2687 | rcu_read_lock(); | |
2688 | ||
2689 | app = ust_app_find_by_pid(pid); | |
2690 | if (app == NULL) { | |
2691 | ERR("UST app enable event per PID %d not found", pid); | |
2692 | ret = -1; | |
2693 | goto error; | |
2694 | } | |
2695 | ||
e0c7ec2b DG |
2696 | if (!app->compatible) { |
2697 | ret = 0; | |
2698 | goto error; | |
2699 | } | |
2700 | ||
76d45b40 DG |
2701 | ua_sess = lookup_session_by_app(usess, app); |
2702 | /* If ua_sess is NULL, there is a code flow error */ | |
2703 | assert(ua_sess); | |
2704 | ||
2705 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2706 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2707 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2708 | /* If the channel is not found, there is a code flow error */ |
2709 | assert(ua_chan_node); | |
2710 | ||
2711 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2712 | ||
bec39940 DG |
2713 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2714 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2715 | if (ua_event_node == NULL) { |
2716 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); | |
2717 | if (ret < 0) { | |
2718 | goto error; | |
2719 | } | |
2720 | } else { | |
2721 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2722 | ||
2723 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2724 | if (ret < 0) { | |
2725 | goto error; | |
2726 | } | |
2727 | } | |
2728 | ||
2729 | error: | |
2730 | rcu_read_unlock(); | |
2731 | return ret; | |
2732 | } | |
7f79d3a1 DG |
2733 | |
2734 | /* | |
2735 | * Disable event for a channel from a UST session for a specific PID. | |
2736 | */ | |
2737 | int ust_app_disable_event_pid(struct ltt_ust_session *usess, | |
2738 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2739 | { | |
2740 | int ret = 0; | |
bec39940 DG |
2741 | struct lttng_ht_iter iter; |
2742 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
7f79d3a1 DG |
2743 | struct ust_app *app; |
2744 | struct ust_app_session *ua_sess; | |
2745 | struct ust_app_channel *ua_chan; | |
2746 | struct ust_app_event *ua_event; | |
2747 | ||
2748 | DBG("UST app disabling event %s for PID %d", uevent->attr.name, pid); | |
2749 | ||
2750 | rcu_read_lock(); | |
2751 | ||
2752 | app = ust_app_find_by_pid(pid); | |
2753 | if (app == NULL) { | |
2754 | ERR("UST app disable event per PID %d not found", pid); | |
2755 | ret = -1; | |
2756 | goto error; | |
2757 | } | |
2758 | ||
e0c7ec2b DG |
2759 | if (!app->compatible) { |
2760 | ret = 0; | |
2761 | goto error; | |
2762 | } | |
2763 | ||
7f79d3a1 DG |
2764 | ua_sess = lookup_session_by_app(usess, app); |
2765 | /* If ua_sess is NULL, there is a code flow error */ | |
2766 | assert(ua_sess); | |
2767 | ||
2768 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2769 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2770 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2771 | if (ua_chan_node == NULL) { |
2772 | /* Channel does not exist, skip disabling */ | |
2773 | goto error; | |
2774 | } | |
2775 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2776 | ||
bec39940 DG |
2777 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2778 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2779 | if (ua_event_node == NULL) { |
2780 | /* Event does not exist, skip disabling */ | |
2781 | goto error; | |
2782 | } | |
2783 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2784 | ||
2785 | ret = disable_ust_app_event(ua_sess, ua_event, app); | |
2786 | if (ret < 0) { | |
2787 | goto error; | |
2788 | } | |
2789 | ||
2790 | error: | |
2791 | rcu_read_unlock(); | |
2792 | return ret; | |
2793 | } | |
e0c7ec2b DG |
2794 | |
2795 | /* | |
2796 | * Validate version of UST apps and set the compatible bit. | |
2797 | */ | |
2798 | int ust_app_validate_version(int sock) | |
2799 | { | |
2800 | int ret; | |
2801 | struct ust_app *app; | |
2802 | ||
2803 | rcu_read_lock(); | |
2804 | ||
2805 | app = find_app_by_sock(sock); | |
2806 | assert(app); | |
2807 | ||
2808 | ret = ustctl_tracer_version(sock, &app->version); | |
2809 | if (ret < 0) { | |
2810 | goto error; | |
2811 | } | |
2812 | ||
2813 | /* Validate version */ | |
2814 | if (app->version.major > UST_APP_MAJOR_VERSION) { | |
2815 | goto error; | |
2816 | } | |
2817 | ||
2818 | DBG2("UST app PID %d is compatible with major version %d " | |
852d0037 | 2819 | "(supporting <= %d)", app->pid, app->version.major, |
e0c7ec2b DG |
2820 | UST_APP_MAJOR_VERSION); |
2821 | app->compatible = 1; | |
2822 | rcu_read_unlock(); | |
2823 | return 0; | |
2824 | ||
2825 | error: | |
2826 | DBG2("UST app PID %d is not compatible with major version %d " | |
852d0037 | 2827 | "(supporting <= %d)", app->pid, app->version.major, |
e0c7ec2b DG |
2828 | UST_APP_MAJOR_VERSION); |
2829 | app->compatible = 0; | |
2830 | rcu_read_unlock(); | |
2831 | return -1; | |
2832 | } | |
4466912f DG |
2833 | |
2834 | /* | |
2835 | * Calibrate registered applications. | |
2836 | */ | |
2837 | int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate) | |
2838 | { | |
2839 | int ret = 0; | |
2840 | struct lttng_ht_iter iter; | |
2841 | struct ust_app *app; | |
2842 | ||
2843 | rcu_read_lock(); | |
2844 | ||
852d0037 | 2845 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
4466912f DG |
2846 | if (!app->compatible) { |
2847 | /* | |
2848 | * TODO: In time, we should notice the caller of this error by | |
2849 | * telling him that this is a version error. | |
2850 | */ | |
2851 | continue; | |
2852 | } | |
2853 | ||
852d0037 | 2854 | ret = ustctl_calibrate(app->sock, calibrate); |
4466912f DG |
2855 | if (ret < 0) { |
2856 | switch (ret) { | |
2857 | case -ENOSYS: | |
2858 | /* Means that it's not implemented on the tracer side. */ | |
2859 | ret = 0; | |
2860 | break; | |
2861 | default: | |
2862 | /* TODO: Report error to user */ | |
2863 | DBG2("Calibrate app PID %d returned with error %d", | |
852d0037 | 2864 | app->pid, ret); |
4466912f DG |
2865 | break; |
2866 | } | |
2867 | } | |
2868 | } | |
2869 | ||
2870 | DBG("UST app global domain calibration finished"); | |
2871 | ||
2872 | rcu_read_unlock(); | |
2873 | ||
2874 | return ret; | |
2875 | } |