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" |
d80a6244 | 35 | |
55cc08a6 DG |
36 | /* |
37 | * Delete ust context safely. RCU read lock must be held before calling | |
38 | * this function. | |
39 | */ | |
40 | static | |
41 | void delete_ust_app_ctx(int sock, struct ust_app_ctx *ua_ctx) | |
42 | { | |
43 | if (ua_ctx->obj) { | |
44 | ustctl_release_object(sock, ua_ctx->obj); | |
45 | free(ua_ctx->obj); | |
46 | } | |
47 | free(ua_ctx); | |
48 | } | |
49 | ||
d80a6244 DG |
50 | /* |
51 | * Delete ust app event safely. RCU read lock must be held before calling | |
52 | * this function. | |
53 | */ | |
8b366481 DG |
54 | static |
55 | void delete_ust_app_event(int sock, struct ust_app_event *ua_event) | |
d80a6244 | 56 | { |
55cc08a6 | 57 | int ret; |
bec39940 | 58 | struct lttng_ht_iter iter; |
55cc08a6 DG |
59 | struct ust_app_ctx *ua_ctx; |
60 | ||
fc34caaa | 61 | /* Destroy each context of event */ |
bec39940 DG |
62 | cds_lfht_for_each_entry(ua_event->ctx->ht, &iter.iter, ua_ctx, |
63 | node.node) { | |
64 | ret = lttng_ht_del(ua_event->ctx, &iter); | |
55cc08a6 DG |
65 | assert(!ret); |
66 | delete_ust_app_ctx(sock, ua_ctx); | |
67 | } | |
bec39940 | 68 | lttng_ht_destroy(ua_event->ctx); |
d80a6244 | 69 | |
edb67388 DG |
70 | if (ua_event->obj != NULL) { |
71 | ustctl_release_object(sock, ua_event->obj); | |
72 | free(ua_event->obj); | |
73 | } | |
d80a6244 DG |
74 | free(ua_event); |
75 | } | |
76 | ||
77 | /* | |
78 | * Delete ust app stream safely. RCU read lock must be held before calling | |
79 | * this function. | |
80 | */ | |
8b366481 DG |
81 | static |
82 | void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream) | |
d80a6244 | 83 | { |
8b366481 DG |
84 | if (stream->obj) { |
85 | ustctl_release_object(sock, stream->obj); | |
4063050c | 86 | lttng_fd_put(LTTNG_FD_APPS, 2); |
8b366481 DG |
87 | free(stream->obj); |
88 | } | |
84cd17c6 | 89 | free(stream); |
d80a6244 DG |
90 | } |
91 | ||
92 | /* | |
93 | * Delete ust app channel safely. RCU read lock must be held before calling | |
94 | * this function. | |
95 | */ | |
8b366481 DG |
96 | static |
97 | void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan) | |
d80a6244 DG |
98 | { |
99 | int ret; | |
bec39940 | 100 | struct lttng_ht_iter iter; |
d80a6244 | 101 | struct ust_app_event *ua_event; |
55cc08a6 | 102 | struct ust_app_ctx *ua_ctx; |
d80a6244 DG |
103 | struct ltt_ust_stream *stream, *stmp; |
104 | ||
55cc08a6 | 105 | /* Wipe stream */ |
d80a6244 | 106 | cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) { |
84cd17c6 | 107 | cds_list_del(&stream->list); |
d80a6244 DG |
108 | delete_ust_app_stream(sock, stream); |
109 | } | |
110 | ||
55cc08a6 | 111 | /* Wipe context */ |
bec39940 DG |
112 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter.iter, ua_ctx, node.node) { |
113 | ret = lttng_ht_del(ua_chan->ctx, &iter); | |
55cc08a6 DG |
114 | assert(!ret); |
115 | delete_ust_app_ctx(sock, ua_ctx); | |
116 | } | |
bec39940 | 117 | lttng_ht_destroy(ua_chan->ctx); |
d80a6244 | 118 | |
55cc08a6 | 119 | /* Wipe events */ |
bec39940 DG |
120 | cds_lfht_for_each_entry(ua_chan->events->ht, &iter.iter, ua_event, |
121 | node.node) { | |
122 | ret = lttng_ht_del(ua_chan->events, &iter); | |
525b0740 | 123 | assert(!ret); |
d80a6244 DG |
124 | delete_ust_app_event(sock, ua_event); |
125 | } | |
bec39940 | 126 | lttng_ht_destroy(ua_chan->events); |
edb67388 DG |
127 | |
128 | if (ua_chan->obj != NULL) { | |
129 | ustctl_release_object(sock, ua_chan->obj); | |
4063050c | 130 | lttng_fd_put(LTTNG_FD_APPS, 2); |
edb67388 DG |
131 | free(ua_chan->obj); |
132 | } | |
84cd17c6 | 133 | free(ua_chan); |
d80a6244 DG |
134 | } |
135 | ||
136 | /* | |
137 | * Delete ust app session safely. RCU read lock must be held before calling | |
138 | * this function. | |
139 | */ | |
8b366481 DG |
140 | static |
141 | void delete_ust_app_session(int sock, struct ust_app_session *ua_sess) | |
d80a6244 DG |
142 | { |
143 | int ret; | |
bec39940 | 144 | struct lttng_ht_iter iter; |
d80a6244 DG |
145 | struct ust_app_channel *ua_chan; |
146 | ||
147 | if (ua_sess->metadata) { | |
8b366481 DG |
148 | if (ua_sess->metadata->stream_obj) { |
149 | ustctl_release_object(sock, ua_sess->metadata->stream_obj); | |
4063050c | 150 | lttng_fd_put(LTTNG_FD_APPS, 2); |
8b366481 DG |
151 | free(ua_sess->metadata->stream_obj); |
152 | } | |
153 | if (ua_sess->metadata->obj) { | |
154 | ustctl_release_object(sock, ua_sess->metadata->obj); | |
4063050c | 155 | lttng_fd_put(LTTNG_FD_APPS, 2); |
8b366481 DG |
156 | free(ua_sess->metadata->obj); |
157 | } | |
a2c0da86 | 158 | trace_ust_destroy_metadata(ua_sess->metadata); |
d80a6244 DG |
159 | } |
160 | ||
bec39940 DG |
161 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
162 | node.node) { | |
163 | ret = lttng_ht_del(ua_sess->channels, &iter); | |
525b0740 | 164 | assert(!ret); |
d80a6244 DG |
165 | delete_ust_app_channel(sock, ua_chan); |
166 | } | |
bec39940 | 167 | lttng_ht_destroy(ua_sess->channels); |
d80a6244 | 168 | |
aee6bafd MD |
169 | if (ua_sess->handle != -1) { |
170 | ustctl_release_handle(sock, ua_sess->handle); | |
171 | } | |
8b366481 | 172 | free(ua_sess); |
d80a6244 | 173 | } |
91d76f53 DG |
174 | |
175 | /* | |
284d8f55 DG |
176 | * Delete a traceable application structure from the global list. Never call |
177 | * this function outside of a call_rcu call. | |
91d76f53 | 178 | */ |
8b366481 DG |
179 | static |
180 | void delete_ust_app(struct ust_app *app) | |
91d76f53 | 181 | { |
8b366481 | 182 | int ret, sock; |
bec39940 | 183 | struct lttng_ht_iter iter; |
284d8f55 | 184 | struct ust_app_session *ua_sess; |
44d3bd01 | 185 | |
f6a9efaa | 186 | rcu_read_lock(); |
44d3bd01 | 187 | |
d80a6244 | 188 | /* Delete ust app sessions info */ |
852d0037 DG |
189 | sock = app->sock; |
190 | app->sock = -1; | |
d80a6244 | 191 | |
8b366481 | 192 | /* Wipe sessions */ |
bec39940 DG |
193 | cds_lfht_for_each_entry(app->sessions->ht, &iter.iter, ua_sess, |
194 | node.node) { | |
195 | ret = lttng_ht_del(app->sessions, &iter); | |
525b0740 | 196 | assert(!ret); |
852d0037 | 197 | delete_ust_app_session(app->sock, ua_sess); |
d80a6244 | 198 | } |
bec39940 | 199 | lttng_ht_destroy(app->sessions); |
d80a6244 | 200 | |
6414a713 | 201 | /* |
852d0037 DG |
202 | * Wait until we have deleted the application from the sock hash table |
203 | * before closing this socket, otherwise an application could re-use the | |
204 | * socket ID and race with the teardown, using the same hash table entry. | |
205 | * | |
206 | * It's OK to leave the close in call_rcu. We want it to stay unique for | |
207 | * all RCU readers that could run concurrently with unregister app, | |
208 | * therefore we _need_ to only close that socket after a grace period. So | |
209 | * it should stay in this RCU callback. | |
210 | * | |
211 | * This close() is a very important step of the synchronization model so | |
212 | * every modification to this function must be carefully reviewed. | |
6414a713 | 213 | */ |
799e2c4f MD |
214 | ret = close(sock); |
215 | if (ret) { | |
216 | PERROR("close"); | |
217 | } | |
4063050c | 218 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d80a6244 | 219 | |
852d0037 | 220 | DBG2("UST app pid %d deleted", app->pid); |
284d8f55 | 221 | free(app); |
bec39940 | 222 | |
f6a9efaa | 223 | rcu_read_unlock(); |
099e26bd DG |
224 | } |
225 | ||
226 | /* | |
f6a9efaa | 227 | * URCU intermediate call to delete an UST app. |
099e26bd | 228 | */ |
8b366481 DG |
229 | static |
230 | void delete_ust_app_rcu(struct rcu_head *head) | |
099e26bd | 231 | { |
bec39940 DG |
232 | struct lttng_ht_node_ulong *node = |
233 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa | 234 | struct ust_app *app = |
852d0037 | 235 | caa_container_of(node, struct ust_app, pid_n); |
f6a9efaa | 236 | |
852d0037 | 237 | DBG3("Call RCU deleting app PID %d", app->pid); |
f6a9efaa | 238 | delete_ust_app(app); |
099e26bd DG |
239 | } |
240 | ||
8b366481 DG |
241 | /* |
242 | * Alloc new UST app session. | |
243 | */ | |
244 | static | |
245 | struct ust_app_session *alloc_ust_app_session(void) | |
246 | { | |
247 | struct ust_app_session *ua_sess; | |
248 | ||
249 | /* Init most of the default value by allocating and zeroing */ | |
250 | ua_sess = zmalloc(sizeof(struct ust_app_session)); | |
251 | if (ua_sess == NULL) { | |
252 | PERROR("malloc"); | |
253 | goto error; | |
254 | } | |
255 | ||
256 | ua_sess->handle = -1; | |
bec39940 | 257 | ua_sess->channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
8b366481 DG |
258 | |
259 | return ua_sess; | |
260 | ||
261 | error: | |
262 | return NULL; | |
263 | } | |
264 | ||
265 | /* | |
266 | * Alloc new UST app channel. | |
267 | */ | |
268 | static | |
269 | struct ust_app_channel *alloc_ust_app_channel(char *name, | |
270 | struct lttng_ust_channel *attr) | |
271 | { | |
272 | struct ust_app_channel *ua_chan; | |
273 | ||
274 | /* Init most of the default value by allocating and zeroing */ | |
275 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); | |
276 | if (ua_chan == NULL) { | |
277 | PERROR("malloc"); | |
278 | goto error; | |
279 | } | |
280 | ||
281 | /* Setup channel name */ | |
282 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
283 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
284 | ||
285 | ua_chan->enabled = 1; | |
286 | ua_chan->handle = -1; | |
bec39940 DG |
287 | ua_chan->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
288 | ua_chan->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); | |
289 | lttng_ht_node_init_str(&ua_chan->node, ua_chan->name); | |
8b366481 DG |
290 | |
291 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); | |
292 | ||
293 | /* Copy attributes */ | |
294 | if (attr) { | |
295 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
296 | } | |
297 | ||
298 | DBG3("UST app channel %s allocated", ua_chan->name); | |
299 | ||
300 | return ua_chan; | |
301 | ||
302 | error: | |
303 | return NULL; | |
304 | } | |
305 | ||
306 | /* | |
307 | * Alloc new UST app event. | |
308 | */ | |
309 | static | |
310 | struct ust_app_event *alloc_ust_app_event(char *name, | |
311 | struct lttng_ust_event *attr) | |
312 | { | |
313 | struct ust_app_event *ua_event; | |
314 | ||
315 | /* Init most of the default value by allocating and zeroing */ | |
316 | ua_event = zmalloc(sizeof(struct ust_app_event)); | |
317 | if (ua_event == NULL) { | |
318 | PERROR("malloc"); | |
319 | goto error; | |
320 | } | |
321 | ||
322 | ua_event->enabled = 1; | |
323 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
324 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
bec39940 DG |
325 | ua_event->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
326 | lttng_ht_node_init_str(&ua_event->node, ua_event->name); | |
8b366481 DG |
327 | |
328 | /* Copy attributes */ | |
329 | if (attr) { | |
330 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
331 | } | |
332 | ||
333 | DBG3("UST app event %s allocated", ua_event->name); | |
334 | ||
335 | return ua_event; | |
336 | ||
337 | error: | |
338 | return NULL; | |
339 | } | |
340 | ||
341 | /* | |
342 | * Alloc new UST app context. | |
343 | */ | |
344 | static | |
345 | struct ust_app_ctx *alloc_ust_app_ctx(struct lttng_ust_context *uctx) | |
346 | { | |
347 | struct ust_app_ctx *ua_ctx; | |
348 | ||
349 | ua_ctx = zmalloc(sizeof(struct ust_app_ctx)); | |
350 | if (ua_ctx == NULL) { | |
351 | goto error; | |
352 | } | |
353 | ||
354 | if (uctx) { | |
355 | memcpy(&ua_ctx->ctx, uctx, sizeof(ua_ctx->ctx)); | |
356 | } | |
357 | ||
358 | DBG3("UST app context %d allocated", ua_ctx->ctx.ctx); | |
359 | ||
360 | error: | |
361 | return ua_ctx; | |
362 | } | |
363 | ||
099e26bd | 364 | /* |
421cb601 DG |
365 | * Find an ust_app using the sock and return it. RCU read side lock must be |
366 | * held before calling this helper function. | |
099e26bd | 367 | */ |
8b366481 DG |
368 | static |
369 | struct ust_app *find_app_by_sock(int sock) | |
099e26bd | 370 | { |
bec39940 | 371 | struct lttng_ht_node_ulong *node; |
bec39940 | 372 | struct lttng_ht_iter iter; |
f6a9efaa | 373 | |
852d0037 | 374 | lttng_ht_lookup(ust_app_ht_by_sock, (void *)((unsigned long) sock), &iter); |
bec39940 | 375 | node = lttng_ht_iter_get_node_ulong(&iter); |
f6a9efaa DG |
376 | if (node == NULL) { |
377 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
378 | goto error; |
379 | } | |
852d0037 DG |
380 | |
381 | return caa_container_of(node, struct ust_app, sock_n); | |
f6a9efaa DG |
382 | |
383 | error: | |
384 | return NULL; | |
099e26bd DG |
385 | } |
386 | ||
55cc08a6 DG |
387 | /* |
388 | * Create the channel context on the tracer. | |
389 | */ | |
390 | static | |
391 | int create_ust_channel_context(struct ust_app_channel *ua_chan, | |
392 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
393 | { | |
394 | int ret; | |
395 | ||
852d0037 | 396 | ret = ustctl_add_context(app->sock, &ua_ctx->ctx, |
55cc08a6 DG |
397 | ua_chan->obj, &ua_ctx->obj); |
398 | if (ret < 0) { | |
399 | goto error; | |
400 | } | |
401 | ||
402 | ua_ctx->handle = ua_ctx->obj->handle; | |
403 | ||
727d5404 | 404 | DBG2("UST app context created successfully for channel %s", ua_chan->name); |
55cc08a6 DG |
405 | |
406 | error: | |
407 | return ret; | |
408 | } | |
409 | ||
410 | /* | |
411 | * Create the event context on the tracer. | |
412 | */ | |
413 | static | |
414 | int create_ust_event_context(struct ust_app_event *ua_event, | |
415 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
416 | { | |
417 | int ret; | |
418 | ||
852d0037 | 419 | ret = ustctl_add_context(app->sock, &ua_ctx->ctx, |
55cc08a6 DG |
420 | ua_event->obj, &ua_ctx->obj); |
421 | if (ret < 0) { | |
422 | goto error; | |
423 | } | |
424 | ||
425 | ua_ctx->handle = ua_ctx->obj->handle; | |
426 | ||
727d5404 | 427 | DBG2("UST app context created successfully for event %s", ua_event->name); |
55cc08a6 DG |
428 | |
429 | error: | |
430 | return ret; | |
431 | } | |
432 | ||
9730260e DG |
433 | /* |
434 | * Disable the specified event on to UST tracer for the UST session. | |
435 | */ | |
436 | static int disable_ust_event(struct ust_app *app, | |
437 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
438 | { | |
439 | int ret; | |
440 | ||
852d0037 | 441 | ret = ustctl_disable(app->sock, ua_event->obj); |
9730260e DG |
442 | if (ret < 0) { |
443 | ERR("UST app event %s disable failed for app (pid: %d) " | |
444 | "and session handle %d with ret %d", | |
852d0037 | 445 | ua_event->attr.name, app->pid, ua_sess->handle, ret); |
9730260e DG |
446 | goto error; |
447 | } | |
448 | ||
449 | DBG2("UST app event %s disabled successfully for app (pid: %d)", | |
852d0037 | 450 | ua_event->attr.name, app->pid); |
9730260e DG |
451 | |
452 | error: | |
453 | return ret; | |
454 | } | |
455 | ||
78f0bacd DG |
456 | /* |
457 | * Disable the specified channel on to UST tracer for the UST session. | |
458 | */ | |
459 | static int disable_ust_channel(struct ust_app *app, | |
460 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
461 | { | |
462 | int ret; | |
463 | ||
852d0037 | 464 | ret = ustctl_disable(app->sock, ua_chan->obj); |
78f0bacd DG |
465 | if (ret < 0) { |
466 | ERR("UST app channel %s disable failed for app (pid: %d) " | |
467 | "and session handle %d with ret %d", | |
852d0037 | 468 | ua_chan->name, app->pid, ua_sess->handle, ret); |
78f0bacd DG |
469 | goto error; |
470 | } | |
471 | ||
78f0bacd | 472 | DBG2("UST app channel %s disabled successfully for app (pid: %d)", |
852d0037 | 473 | ua_chan->name, app->pid); |
78f0bacd DG |
474 | |
475 | error: | |
476 | return ret; | |
477 | } | |
478 | ||
479 | /* | |
480 | * Enable the specified channel on to UST tracer for the UST session. | |
481 | */ | |
482 | static int enable_ust_channel(struct ust_app *app, | |
483 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
484 | { | |
485 | int ret; | |
486 | ||
852d0037 | 487 | ret = ustctl_enable(app->sock, ua_chan->obj); |
78f0bacd DG |
488 | if (ret < 0) { |
489 | ERR("UST app channel %s enable failed for app (pid: %d) " | |
490 | "and session handle %d with ret %d", | |
852d0037 | 491 | ua_chan->name, app->pid, ua_sess->handle, ret); |
78f0bacd DG |
492 | goto error; |
493 | } | |
494 | ||
495 | ua_chan->enabled = 1; | |
496 | ||
497 | DBG2("UST app channel %s enabled successfully for app (pid: %d)", | |
852d0037 | 498 | ua_chan->name, app->pid); |
78f0bacd DG |
499 | |
500 | error: | |
501 | return ret; | |
502 | } | |
503 | ||
edb67388 DG |
504 | /* |
505 | * Enable the specified event on to UST tracer for the UST session. | |
506 | */ | |
507 | static int enable_ust_event(struct ust_app *app, | |
508 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
509 | { | |
510 | int ret; | |
511 | ||
852d0037 | 512 | ret = ustctl_enable(app->sock, ua_event->obj); |
edb67388 DG |
513 | if (ret < 0) { |
514 | ERR("UST app event %s enable failed for app (pid: %d) " | |
515 | "and session handle %d with ret %d", | |
852d0037 | 516 | ua_event->attr.name, app->pid, ua_sess->handle, ret); |
edb67388 DG |
517 | goto error; |
518 | } | |
519 | ||
520 | DBG2("UST app event %s enabled successfully for app (pid: %d)", | |
852d0037 | 521 | ua_event->attr.name, app->pid); |
edb67388 DG |
522 | |
523 | error: | |
524 | return ret; | |
525 | } | |
526 | ||
099e26bd | 527 | /* |
5b4a0ec0 | 528 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 529 | */ |
5b4a0ec0 DG |
530 | static int open_ust_metadata(struct ust_app *app, |
531 | struct ust_app_session *ua_sess) | |
0177d773 | 532 | { |
5b4a0ec0 DG |
533 | int ret; |
534 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 535 | |
5b4a0ec0 DG |
536 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
537 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
538 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
539 | uattr.switch_timer_interval = | |
540 | ua_sess->metadata->attr.switch_timer_interval; | |
541 | uattr.read_timer_interval = | |
542 | ua_sess->metadata->attr.read_timer_interval; | |
543 | uattr.output = ua_sess->metadata->attr.output; | |
544 | ||
4063050c MD |
545 | /* We are going to receive 2 fds, we need to reserve them. */ |
546 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
547 | if (ret < 0) { | |
548 | ERR("Exhausted number of available FD upon metadata open"); | |
549 | goto error; | |
550 | } | |
5b4a0ec0 | 551 | /* UST tracer metadata creation */ |
852d0037 | 552 | ret = ustctl_open_metadata(app->sock, ua_sess->handle, &uattr, |
5b4a0ec0 DG |
553 | &ua_sess->metadata->obj); |
554 | if (ret < 0) { | |
fc34caaa | 555 | ERR("UST app open metadata failed for app pid:%d with ret %d", |
852d0037 | 556 | app->pid, ret); |
f6a9efaa | 557 | goto error; |
0177d773 | 558 | } |
f6a9efaa | 559 | |
6d3686da DG |
560 | ua_sess->metadata->handle = ua_sess->metadata->obj->handle; |
561 | ||
f6a9efaa | 562 | error: |
5b4a0ec0 | 563 | return ret; |
91d76f53 DG |
564 | } |
565 | ||
566 | /* | |
5b4a0ec0 | 567 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 568 | */ |
5b4a0ec0 DG |
569 | static int create_ust_stream(struct ust_app *app, |
570 | struct ust_app_session *ua_sess) | |
91d76f53 | 571 | { |
5b4a0ec0 | 572 | int ret; |
421cb601 | 573 | |
4063050c MD |
574 | /* We are going to receive 2 fds, we need to reserve them. */ |
575 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
576 | if (ret < 0) { | |
577 | ERR("Exhausted number of available FD upon metadata stream create"); | |
578 | goto error; | |
579 | } | |
852d0037 | 580 | ret = ustctl_create_stream(app->sock, ua_sess->metadata->obj, |
5b4a0ec0 DG |
581 | &ua_sess->metadata->stream_obj); |
582 | if (ret < 0) { | |
583 | ERR("UST create metadata stream failed"); | |
421cb601 | 584 | goto error; |
91d76f53 | 585 | } |
421cb601 | 586 | |
421cb601 | 587 | error: |
5b4a0ec0 | 588 | return ret; |
91d76f53 DG |
589 | } |
590 | ||
b551a063 | 591 | /* |
5b4a0ec0 | 592 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 593 | */ |
5b4a0ec0 DG |
594 | static int create_ust_channel(struct ust_app *app, |
595 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 596 | { |
5b4a0ec0 | 597 | int ret; |
b551a063 | 598 | |
5b4a0ec0 | 599 | /* TODO: remove cast and use lttng-ust-abi.h */ |
4063050c MD |
600 | |
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 create channel"); | |
605 | goto error; | |
606 | } | |
852d0037 | 607 | ret = ustctl_create_channel(app->sock, ua_sess->handle, |
5b4a0ec0 DG |
608 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); |
609 | if (ret < 0) { | |
58f3ca76 | 610 | ERR("Creating channel %s for app (pid: %d, sock: %d) " |
5b4a0ec0 | 611 | "and session handle %d with ret %d", |
852d0037 | 612 | ua_chan->name, app->pid, app->sock, |
5b4a0ec0 | 613 | ua_sess->handle, ret); |
4063050c | 614 | lttng_fd_put(LTTNG_FD_APPS, 2); |
b551a063 DG |
615 | goto error; |
616 | } | |
617 | ||
5b4a0ec0 | 618 | ua_chan->handle = ua_chan->obj->handle; |
b551a063 | 619 | |
5b4a0ec0 | 620 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
852d0037 | 621 | ua_chan->name, app->pid, app->sock); |
b551a063 | 622 | |
8535a6d9 DG |
623 | /* If channel is not enabled, disable it on the tracer */ |
624 | if (!ua_chan->enabled) { | |
625 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
626 | if (ret < 0) { | |
627 | goto error; | |
628 | } | |
629 | } | |
630 | ||
b551a063 DG |
631 | error: |
632 | return ret; | |
633 | } | |
634 | ||
91d76f53 | 635 | /* |
5b4a0ec0 | 636 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 637 | */ |
edb67388 DG |
638 | static |
639 | int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess, | |
640 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event) | |
91d76f53 | 641 | { |
5b4a0ec0 | 642 | int ret = 0; |
284d8f55 | 643 | |
5b4a0ec0 | 644 | /* Create UST event on tracer */ |
852d0037 | 645 | ret = ustctl_create_event(app->sock, &ua_event->attr, ua_chan->obj, |
5b4a0ec0 DG |
646 | &ua_event->obj); |
647 | if (ret < 0) { | |
c0657016 | 648 | if (ret == -EEXIST || ret == -EPERM) { |
fc34caaa DG |
649 | ret = 0; |
650 | goto error; | |
651 | } | |
5b4a0ec0 | 652 | ERR("Error ustctl create event %s for app pid: %d with ret %d", |
852d0037 | 653 | ua_event->attr.name, app->pid, ret); |
5b4a0ec0 | 654 | goto error; |
91d76f53 | 655 | } |
f6a9efaa | 656 | |
5b4a0ec0 | 657 | ua_event->handle = ua_event->obj->handle; |
284d8f55 | 658 | |
5b4a0ec0 | 659 | DBG2("UST app event %s created successfully for pid:%d", |
852d0037 | 660 | ua_event->attr.name, app->pid); |
f6a9efaa | 661 | |
8535a6d9 | 662 | /* If event not enabled, disable it on the tracer */ |
fc34caaa | 663 | if (ua_event->enabled == 0) { |
8535a6d9 DG |
664 | ret = disable_ust_event(app, ua_sess, ua_event); |
665 | if (ret < 0) { | |
fc34caaa DG |
666 | /* |
667 | * If we hit an EPERM, something is wrong with our disable call. If | |
668 | * we get an EEXIST, there is a problem on the tracer side since we | |
669 | * just created it. | |
670 | */ | |
671 | switch (ret) { | |
672 | case -EPERM: | |
673 | /* Code flow problem */ | |
674 | assert(0); | |
675 | case -EEXIST: | |
676 | /* It's OK for our use case. */ | |
677 | ret = 0; | |
678 | break; | |
679 | default: | |
680 | break; | |
681 | } | |
8535a6d9 DG |
682 | goto error; |
683 | } | |
684 | } | |
685 | ||
5b4a0ec0 DG |
686 | error: |
687 | return ret; | |
91d76f53 | 688 | } |
48842b30 | 689 | |
5b4a0ec0 DG |
690 | /* |
691 | * Copy data between an UST app event and a LTT event. | |
692 | */ | |
421cb601 | 693 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
694 | struct ltt_ust_event *uevent) |
695 | { | |
bec39940 | 696 | struct lttng_ht_iter iter; |
55cc08a6 DG |
697 | struct ltt_ust_context *uctx; |
698 | struct ust_app_ctx *ua_ctx; | |
699 | ||
48842b30 DG |
700 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); |
701 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
702 | ||
fc34caaa DG |
703 | ua_event->enabled = uevent->enabled; |
704 | ||
5b4a0ec0 DG |
705 | /* Copy event attributes */ |
706 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
707 | ||
bec39940 | 708 | cds_lfht_for_each_entry(uevent->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
709 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
710 | if (ua_ctx == NULL) { | |
fc34caaa DG |
711 | /* malloc() failed. We should simply stop */ |
712 | return; | |
55cc08a6 | 713 | } |
fc34caaa | 714 | |
bec39940 DG |
715 | lttng_ht_node_init_ulong(&ua_ctx->node, |
716 | (unsigned long) ua_ctx->ctx.ctx); | |
717 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 | 718 | } |
48842b30 DG |
719 | } |
720 | ||
5b4a0ec0 DG |
721 | /* |
722 | * Copy data between an UST app channel and a LTT channel. | |
723 | */ | |
421cb601 | 724 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
725 | struct ltt_ust_channel *uchan) |
726 | { | |
bec39940 DG |
727 | struct lttng_ht_iter iter; |
728 | struct lttng_ht_node_str *ua_event_node; | |
48842b30 | 729 | struct ltt_ust_event *uevent; |
55cc08a6 | 730 | struct ltt_ust_context *uctx; |
48842b30 | 731 | struct ust_app_event *ua_event; |
55cc08a6 | 732 | struct ust_app_ctx *ua_ctx; |
48842b30 | 733 | |
fc34caaa | 734 | DBG2("UST app shadow copy of channel %s started", ua_chan->name); |
48842b30 DG |
735 | |
736 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
737 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
738 | /* Copy event attributes */ |
739 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 | 740 | |
fc34caaa DG |
741 | ua_chan->enabled = uchan->enabled; |
742 | ||
bec39940 | 743 | cds_lfht_for_each_entry(uchan->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
744 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
745 | if (ua_ctx == NULL) { | |
746 | continue; | |
747 | } | |
bec39940 DG |
748 | lttng_ht_node_init_ulong(&ua_ctx->node, |
749 | (unsigned long) ua_ctx->ctx.ctx); | |
750 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 | 751 | } |
48842b30 | 752 | |
421cb601 | 753 | /* Copy all events from ltt ust channel to ust app channel */ |
bec39940 DG |
754 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
755 | struct lttng_ht_iter uiter; | |
ba767faf | 756 | |
bec39940 DG |
757 | lttng_ht_lookup(ua_chan->events, (void *) uevent->attr.name, &uiter); |
758 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
48842b30 | 759 | if (ua_event_node == NULL) { |
421cb601 | 760 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 761 | uevent->attr.name); |
284d8f55 | 762 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 763 | if (ua_event == NULL) { |
5b4a0ec0 | 764 | continue; |
48842b30 | 765 | } |
421cb601 | 766 | shadow_copy_event(ua_event, uevent); |
bec39940 | 767 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
48842b30 | 768 | } |
48842b30 DG |
769 | } |
770 | ||
fc34caaa | 771 | DBG3("UST app shadow copy of channel %s done", ua_chan->name); |
48842b30 DG |
772 | } |
773 | ||
5b4a0ec0 DG |
774 | /* |
775 | * Copy data between a UST app session and a regular LTT session. | |
776 | */ | |
421cb601 | 777 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
bec39940 | 778 | struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 | 779 | { |
bec39940 DG |
780 | struct lttng_ht_node_str *ua_chan_node; |
781 | struct lttng_ht_iter iter; | |
48842b30 DG |
782 | struct ltt_ust_channel *uchan; |
783 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
784 | time_t rawtime; |
785 | struct tm *timeinfo; | |
786 | char datetime[16]; | |
787 | int ret; | |
788 | ||
789 | /* Get date and time for unique app path */ | |
790 | time(&rawtime); | |
791 | timeinfo = localtime(&rawtime); | |
792 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 793 | |
421cb601 | 794 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 | 795 | |
a991f516 | 796 | ua_sess->id = usess->id; |
6df2e2c9 MD |
797 | ua_sess->uid = usess->uid; |
798 | ua_sess->gid = usess->gid; | |
48842b30 | 799 | |
fc34caaa | 800 | ret = snprintf(ua_sess->path, PATH_MAX, "%s/%s-%d-%s", usess->pathname, |
852d0037 | 801 | app->name, app->pid, datetime); |
477d7741 MD |
802 | if (ret < 0) { |
803 | PERROR("asprintf UST shadow copy session"); | |
804 | /* TODO: We cannot return an error from here.. */ | |
805 | assert(0); | |
806 | } | |
807 | ||
48842b30 DG |
808 | /* TODO: support all UST domain */ |
809 | ||
810 | /* Iterate over all channels in global domain. */ | |
bec39940 DG |
811 | cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter, |
812 | uchan, node.node) { | |
813 | struct lttng_ht_iter uiter; | |
ba767faf | 814 | |
bec39940 DG |
815 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
816 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
5b4a0ec0 | 817 | if (ua_chan_node != NULL) { |
fc34caaa | 818 | /* Session exist. Contiuing. */ |
5b4a0ec0 DG |
819 | continue; |
820 | } | |
421cb601 | 821 | |
5b4a0ec0 DG |
822 | DBG2("Channel %s not found on shadow session copy, creating it", |
823 | uchan->name); | |
824 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
825 | if (ua_chan == NULL) { | |
fc34caaa | 826 | /* malloc failed FIXME: Might want to do handle ENOMEM .. */ |
5b4a0ec0 | 827 | continue; |
48842b30 DG |
828 | } |
829 | ||
5b4a0ec0 | 830 | shadow_copy_channel(ua_chan, uchan); |
bec39940 | 831 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
48842b30 DG |
832 | } |
833 | } | |
834 | ||
78f0bacd DG |
835 | /* |
836 | * Lookup sesison wrapper. | |
837 | */ | |
84cd17c6 MD |
838 | static |
839 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
bec39940 | 840 | struct ust_app *app, struct lttng_ht_iter *iter) |
84cd17c6 MD |
841 | { |
842 | /* Get right UST app session from app */ | |
2c348c10 | 843 | lttng_ht_lookup(app->sessions, (void *)((unsigned long) usess->id), iter); |
84cd17c6 MD |
844 | } |
845 | ||
421cb601 DG |
846 | /* |
847 | * Return ust app session from the app session hashtable using the UST session | |
a991f516 | 848 | * id. |
421cb601 | 849 | */ |
48842b30 DG |
850 | static struct ust_app_session *lookup_session_by_app( |
851 | struct ltt_ust_session *usess, struct ust_app *app) | |
852 | { | |
bec39940 DG |
853 | struct lttng_ht_iter iter; |
854 | struct lttng_ht_node_ulong *node; | |
48842b30 | 855 | |
84cd17c6 | 856 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 857 | node = lttng_ht_iter_get_node_ulong(&iter); |
48842b30 DG |
858 | if (node == NULL) { |
859 | goto error; | |
860 | } | |
861 | ||
862 | return caa_container_of(node, struct ust_app_session, node); | |
863 | ||
864 | error: | |
865 | return NULL; | |
866 | } | |
867 | ||
421cb601 DG |
868 | /* |
869 | * Create a UST session onto the tracer of app and add it the session | |
870 | * hashtable. | |
871 | * | |
872 | * Return ust app session or NULL on error. | |
873 | */ | |
874 | static struct ust_app_session *create_ust_app_session( | |
875 | struct ltt_ust_session *usess, struct ust_app *app) | |
876 | { | |
877 | int ret; | |
878 | struct ust_app_session *ua_sess; | |
879 | ||
880 | ua_sess = lookup_session_by_app(usess, app); | |
881 | if (ua_sess == NULL) { | |
a991f516 | 882 | DBG2("UST app pid: %d session id %d not found, creating it", |
852d0037 | 883 | app->pid, usess->id); |
421cb601 DG |
884 | ua_sess = alloc_ust_app_session(); |
885 | if (ua_sess == NULL) { | |
886 | /* Only malloc can failed so something is really wrong */ | |
fc34caaa | 887 | goto end; |
421cb601 | 888 | } |
477d7741 | 889 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
890 | } |
891 | ||
892 | if (ua_sess->handle == -1) { | |
852d0037 | 893 | ret = ustctl_create_session(app->sock); |
421cb601 | 894 | if (ret < 0) { |
852d0037 | 895 | ERR("Creating session for app pid %d", app->pid); |
915d047c | 896 | /* This means that the tracer is gone... */ |
a78732df | 897 | delete_ust_app_session(-1, ua_sess); |
915d047c | 898 | ua_sess = (void*) -1UL; |
a78732df | 899 | goto end; |
421cb601 DG |
900 | } |
901 | ||
421cb601 DG |
902 | ua_sess->handle = ret; |
903 | ||
904 | /* Add ust app session to app's HT */ | |
2c348c10 | 905 | lttng_ht_node_init_ulong(&ua_sess->node, (unsigned long) ua_sess->id); |
bec39940 | 906 | lttng_ht_add_unique_ulong(app->sessions, &ua_sess->node); |
421cb601 DG |
907 | |
908 | DBG2("UST app session created successfully with handle %d", ret); | |
909 | } | |
910 | ||
fc34caaa | 911 | end: |
421cb601 | 912 | return ua_sess; |
421cb601 DG |
913 | } |
914 | ||
55cc08a6 DG |
915 | /* |
916 | * Create a context for the channel on the tracer. | |
917 | */ | |
918 | static | |
919 | int create_ust_app_channel_context(struct ust_app_session *ua_sess, | |
920 | struct ust_app_channel *ua_chan, struct lttng_ust_context *uctx, | |
921 | struct ust_app *app) | |
922 | { | |
923 | int ret = 0; | |
bec39940 DG |
924 | struct lttng_ht_iter iter; |
925 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
926 | struct ust_app_ctx *ua_ctx; |
927 | ||
928 | DBG2("UST app adding context to channel %s", ua_chan->name); | |
929 | ||
bec39940 DG |
930 | lttng_ht_lookup(ua_chan->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
931 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
932 | if (node != NULL) { |
933 | ret = -EEXIST; | |
934 | goto error; | |
935 | } | |
936 | ||
937 | ua_ctx = alloc_ust_app_ctx(uctx); | |
938 | if (ua_ctx == NULL) { | |
939 | /* malloc failed */ | |
940 | ret = -1; | |
941 | goto error; | |
942 | } | |
943 | ||
bec39940 DG |
944 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
945 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 DG |
946 | |
947 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
948 | if (ret < 0) { | |
949 | goto error; | |
950 | } | |
951 | ||
952 | error: | |
953 | return ret; | |
954 | } | |
955 | ||
956 | /* | |
957 | * Create an UST context and enable it for the event on the tracer. | |
958 | */ | |
959 | static | |
960 | int create_ust_app_event_context(struct ust_app_session *ua_sess, | |
961 | struct ust_app_event *ua_event, struct lttng_ust_context *uctx, | |
962 | struct ust_app *app) | |
963 | { | |
964 | int ret = 0; | |
bec39940 DG |
965 | struct lttng_ht_iter iter; |
966 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
967 | struct ust_app_ctx *ua_ctx; |
968 | ||
969 | DBG2("UST app adding context to event %s", ua_event->name); | |
970 | ||
bec39940 DG |
971 | lttng_ht_lookup(ua_event->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
972 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
973 | if (node != NULL) { |
974 | ret = -EEXIST; | |
975 | goto error; | |
976 | } | |
977 | ||
978 | ua_ctx = alloc_ust_app_ctx(uctx); | |
979 | if (ua_ctx == NULL) { | |
980 | /* malloc failed */ | |
981 | ret = -1; | |
982 | goto error; | |
983 | } | |
984 | ||
bec39940 DG |
985 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
986 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 DG |
987 | |
988 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
989 | if (ret < 0) { | |
990 | goto error; | |
991 | } | |
992 | ||
993 | error: | |
994 | return ret; | |
995 | } | |
996 | ||
edb67388 DG |
997 | /* |
998 | * Enable on the tracer side a ust app event for the session and channel. | |
999 | */ | |
1000 | static | |
1001 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 1002 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
1003 | { |
1004 | int ret; | |
1005 | ||
1006 | ret = enable_ust_event(app, ua_sess, ua_event); | |
1007 | if (ret < 0) { | |
1008 | goto error; | |
1009 | } | |
1010 | ||
1011 | ua_event->enabled = 1; | |
1012 | ||
1013 | error: | |
1014 | return ret; | |
1015 | } | |
1016 | ||
9730260e DG |
1017 | /* |
1018 | * Disable on the tracer side a ust app event for the session and channel. | |
1019 | */ | |
1020 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
7f79d3a1 | 1021 | struct ust_app_event *ua_event, struct ust_app *app) |
9730260e DG |
1022 | { |
1023 | int ret; | |
1024 | ||
1025 | ret = disable_ust_event(app, ua_sess, ua_event); | |
1026 | if (ret < 0) { | |
1027 | goto error; | |
1028 | } | |
1029 | ||
1030 | ua_event->enabled = 0; | |
1031 | ||
1032 | error: | |
1033 | return ret; | |
1034 | } | |
1035 | ||
78f0bacd DG |
1036 | /* |
1037 | * Lookup ust app channel for session and disable it on the tracer side. | |
1038 | */ | |
8535a6d9 DG |
1039 | static |
1040 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
1041 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 1042 | { |
8535a6d9 | 1043 | int ret; |
78f0bacd DG |
1044 | |
1045 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
1046 | if (ret < 0) { | |
1047 | goto error; | |
1048 | } | |
1049 | ||
8535a6d9 DG |
1050 | ua_chan->enabled = 0; |
1051 | ||
78f0bacd DG |
1052 | error: |
1053 | return ret; | |
1054 | } | |
1055 | ||
1056 | /* | |
1057 | * Lookup ust app channel for session and enable it on the tracer side. | |
1058 | */ | |
1059 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
1060 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
1061 | { | |
1062 | int ret = 0; | |
bec39940 DG |
1063 | struct lttng_ht_iter iter; |
1064 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1065 | struct ust_app_channel *ua_chan; |
1066 | ||
bec39940 DG |
1067 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1068 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
78f0bacd | 1069 | if (ua_chan_node == NULL) { |
a991f516 MD |
1070 | DBG2("Unable to find channel %s in ust session id %u", |
1071 | uchan->name, ua_sess->id); | |
78f0bacd DG |
1072 | goto error; |
1073 | } | |
1074 | ||
1075 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1076 | ||
1077 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
1078 | if (ret < 0) { | |
1079 | goto error; | |
1080 | } | |
1081 | ||
1082 | error: | |
1083 | return ret; | |
1084 | } | |
1085 | ||
284d8f55 | 1086 | /* |
5b4a0ec0 | 1087 | * Create UST app channel and create it on the tracer. |
284d8f55 | 1088 | */ |
5b4a0ec0 DG |
1089 | static struct ust_app_channel *create_ust_app_channel( |
1090 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
1091 | struct ust_app *app) | |
1092 | { | |
1093 | int ret = 0; | |
bec39940 DG |
1094 | struct lttng_ht_iter iter; |
1095 | struct lttng_ht_node_str *ua_chan_node; | |
5b4a0ec0 DG |
1096 | struct ust_app_channel *ua_chan; |
1097 | ||
1098 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1099 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1100 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
fc34caaa | 1101 | if (ua_chan_node != NULL) { |
5b4a0ec0 | 1102 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
fc34caaa | 1103 | goto end; |
5b4a0ec0 DG |
1104 | } |
1105 | ||
fc34caaa DG |
1106 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); |
1107 | if (ua_chan == NULL) { | |
1108 | /* Only malloc can fail here */ | |
1109 | goto error; | |
1110 | } | |
1111 | shadow_copy_channel(ua_chan, uchan); | |
1112 | ||
5b4a0ec0 DG |
1113 | ret = create_ust_channel(app, ua_sess, ua_chan); |
1114 | if (ret < 0) { | |
fc34caaa DG |
1115 | /* Not found previously means that it does not exist on the tracer */ |
1116 | assert(ret != -EEXIST); | |
5b4a0ec0 DG |
1117 | goto error; |
1118 | } | |
1119 | ||
58f3ca76 DG |
1120 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
1121 | ||
fc34caaa | 1122 | DBG2("UST app create channel %s for PID %d completed", ua_chan->name, |
852d0037 | 1123 | app->pid); |
fc34caaa DG |
1124 | |
1125 | end: | |
5b4a0ec0 DG |
1126 | return ua_chan; |
1127 | ||
1128 | error: | |
fc34caaa | 1129 | delete_ust_app_channel(-1, ua_chan); |
5b4a0ec0 DG |
1130 | return NULL; |
1131 | } | |
1132 | ||
1133 | /* | |
1134 | * Create UST app event and create it on the tracer side. | |
1135 | */ | |
edb67388 DG |
1136 | static |
1137 | int create_ust_app_event(struct ust_app_session *ua_sess, | |
1138 | struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent, | |
1139 | struct ust_app *app) | |
284d8f55 | 1140 | { |
edb67388 | 1141 | int ret = 0; |
bec39940 DG |
1142 | struct lttng_ht_iter iter; |
1143 | struct lttng_ht_node_str *ua_event_node; | |
5b4a0ec0 | 1144 | struct ust_app_event *ua_event; |
284d8f55 | 1145 | |
5b4a0ec0 | 1146 | /* Get event node */ |
bec39940 DG |
1147 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
1148 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
edb67388 | 1149 | if (ua_event_node != NULL) { |
fc34caaa | 1150 | ret = -EEXIST; |
edb67388 DG |
1151 | goto end; |
1152 | } | |
5b4a0ec0 | 1153 | |
edb67388 DG |
1154 | /* Does not exist so create one */ |
1155 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
1156 | if (ua_event == NULL) { | |
1157 | /* Only malloc can failed so something is really wrong */ | |
1158 | ret = -ENOMEM; | |
fc34caaa | 1159 | goto end; |
5b4a0ec0 | 1160 | } |
edb67388 | 1161 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 1162 | |
edb67388 | 1163 | /* Create it on the tracer side */ |
5b4a0ec0 | 1164 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 1165 | if (ret < 0) { |
fc34caaa DG |
1166 | /* Not found previously means that it does not exist on the tracer */ |
1167 | assert(ret != -EEXIST); | |
284d8f55 DG |
1168 | goto error; |
1169 | } | |
1170 | ||
bec39940 | 1171 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
284d8f55 | 1172 | |
fc34caaa | 1173 | DBG2("UST app create event %s for PID %d completed", ua_event->name, |
852d0037 | 1174 | app->pid); |
7f79d3a1 | 1175 | |
edb67388 | 1176 | end: |
fc34caaa DG |
1177 | return ret; |
1178 | ||
5b4a0ec0 | 1179 | error: |
fc34caaa DG |
1180 | /* Valid. Calling here is already in a read side lock */ |
1181 | delete_ust_app_event(-1, ua_event); | |
edb67388 | 1182 | return ret; |
5b4a0ec0 DG |
1183 | } |
1184 | ||
1185 | /* | |
1186 | * Create UST metadata and open it on the tracer side. | |
1187 | */ | |
1188 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
1189 | char *pathname, struct ust_app *app) | |
1190 | { | |
1191 | int ret = 0; | |
1192 | ||
1193 | if (ua_sess->metadata == NULL) { | |
1194 | /* Allocate UST metadata */ | |
1195 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
1196 | if (ua_sess->metadata == NULL) { | |
fc34caaa | 1197 | /* malloc() failed */ |
5b4a0ec0 DG |
1198 | goto error; |
1199 | } | |
1200 | ||
1201 | ret = open_ust_metadata(app, ua_sess); | |
1202 | if (ret < 0) { | |
7db205b5 DG |
1203 | DBG3("Opening metadata failed. Cleaning up memory"); |
1204 | ||
fc34caaa DG |
1205 | /* Cleanup failed metadata struct */ |
1206 | free(ua_sess->metadata); | |
7db205b5 DG |
1207 | /* |
1208 | * This is very important because delete_ust_app_session check if | |
1209 | * the pointer is null or not in order to delete the metadata. | |
1210 | */ | |
1211 | ua_sess->metadata = NULL; | |
5b4a0ec0 DG |
1212 | goto error; |
1213 | } | |
1214 | ||
852d0037 | 1215 | DBG2("UST metadata opened for app pid %d", app->pid); |
5b4a0ec0 DG |
1216 | } |
1217 | ||
1218 | /* Open UST metadata stream */ | |
1219 | if (ua_sess->metadata->stream_obj == NULL) { | |
1220 | ret = create_ust_stream(app, ua_sess); | |
1221 | if (ret < 0) { | |
1222 | goto error; | |
1223 | } | |
1224 | ||
e11d277b | 1225 | ret = run_as_mkdir(ua_sess->path, S_IRWXU | S_IRWXG, |
67f747d8 | 1226 | ua_sess->uid, ua_sess->gid); |
5b4a0ec0 DG |
1227 | if (ret < 0) { |
1228 | PERROR("mkdir UST metadata"); | |
1229 | goto error; | |
1230 | } | |
1231 | ||
477d7741 MD |
1232 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
1233 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
1234 | if (ret < 0) { |
1235 | PERROR("asprintf UST create stream"); | |
1236 | goto error; | |
1237 | } | |
1238 | ||
1239 | DBG2("UST metadata stream object created for app pid %d", | |
852d0037 | 1240 | app->pid); |
5b4a0ec0 DG |
1241 | } else { |
1242 | ERR("Attempting to create stream without metadata opened"); | |
1243 | goto error; | |
1244 | } | |
1245 | ||
1246 | return 0; | |
1247 | ||
1248 | error: | |
1249 | return -1; | |
1250 | } | |
1251 | ||
1252 | /* | |
1253 | * Return pointer to traceable apps list. | |
1254 | */ | |
bec39940 | 1255 | struct lttng_ht *ust_app_get_ht(void) |
5b4a0ec0 DG |
1256 | { |
1257 | return ust_app_ht; | |
1258 | } | |
1259 | ||
1260 | /* | |
1261 | * Return ust app pointer or NULL if not found. | |
1262 | */ | |
1263 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
1264 | { | |
bec39940 DG |
1265 | struct lttng_ht_node_ulong *node; |
1266 | struct lttng_ht_iter iter; | |
5b4a0ec0 DG |
1267 | |
1268 | rcu_read_lock(); | |
bec39940 DG |
1269 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) pid), &iter); |
1270 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1271 | if (node == NULL) { |
1272 | DBG2("UST app no found with pid %d", pid); | |
1273 | goto error; | |
1274 | } | |
1275 | rcu_read_unlock(); | |
1276 | ||
1277 | DBG2("Found UST app by pid %d", pid); | |
1278 | ||
852d0037 | 1279 | return caa_container_of(node, struct ust_app, pid_n); |
5b4a0ec0 DG |
1280 | |
1281 | error: | |
1282 | rcu_read_unlock(); | |
1283 | return NULL; | |
1284 | } | |
1285 | ||
1286 | /* | |
1287 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
1288 | * add it to the global traceable app list. | |
1289 | * | |
0df502fd MD |
1290 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
1291 | * bitness is not supported. | |
5b4a0ec0 DG |
1292 | */ |
1293 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
1294 | { | |
1295 | struct ust_app *lta; | |
799e2c4f | 1296 | int ret; |
5b4a0ec0 | 1297 | |
7753dea8 MD |
1298 | if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL) |
1299 | || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) { | |
f943b0fb | 1300 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1301 | "%d-bit long, but no consumerd for this long size is available.\n", |
1302 | msg->name, msg->pid, msg->bits_per_long); | |
799e2c4f MD |
1303 | ret = close(sock); |
1304 | if (ret) { | |
1305 | PERROR("close"); | |
1306 | } | |
4063050c | 1307 | lttng_fd_put(LTTNG_FD_APPS, 1); |
0df502fd MD |
1308 | return -EINVAL; |
1309 | } | |
3f2c5fcc MD |
1310 | if (msg->major != LTTNG_UST_COMM_MAJOR) { |
1311 | ERR("Registration failed: application \"%s\" (pid: %d) has " | |
1312 | "communication protocol version %u.%u, but sessiond supports 2.x.\n", | |
1313 | msg->name, msg->pid, msg->major, msg->minor); | |
799e2c4f MD |
1314 | ret = close(sock); |
1315 | if (ret) { | |
1316 | PERROR("close"); | |
1317 | } | |
4063050c | 1318 | lttng_fd_put(LTTNG_FD_APPS, 1); |
3f2c5fcc MD |
1319 | return -EINVAL; |
1320 | } | |
5b4a0ec0 DG |
1321 | lta = zmalloc(sizeof(struct ust_app)); |
1322 | if (lta == NULL) { | |
1323 | PERROR("malloc"); | |
1324 | return -ENOMEM; | |
1325 | } | |
1326 | ||
1327 | lta->ppid = msg->ppid; | |
1328 | lta->uid = msg->uid; | |
1329 | lta->gid = msg->gid; | |
e0c7ec2b | 1330 | lta->compatible = 0; /* Not compatible until proven */ |
7753dea8 | 1331 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1332 | lta->v_major = msg->major; |
1333 | lta->v_minor = msg->minor; | |
1334 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1335 | lta->name[16] = '\0'; | |
bec39940 | 1336 | lta->sessions = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
5b4a0ec0 | 1337 | |
852d0037 DG |
1338 | lta->pid = msg->pid; |
1339 | lttng_ht_node_init_ulong(<a->pid_n, (unsigned long)lta->pid); | |
1340 | lta->sock = sock; | |
1341 | lttng_ht_node_init_ulong(<a->sock_n, (unsigned long)lta->sock); | |
5b4a0ec0 DG |
1342 | |
1343 | rcu_read_lock(); | |
852d0037 DG |
1344 | |
1345 | /* | |
1346 | * On a re-registration, we want to kick out the previous registration of | |
1347 | * that pid | |
1348 | */ | |
1349 | lttng_ht_add_replace_ulong(ust_app_ht, <a->pid_n); | |
1350 | ||
1351 | /* | |
1352 | * The socket _should_ be unique until _we_ call close. So, a add_unique | |
1353 | * for the ust_app_ht_by_sock is used which asserts fail if the entry was | |
1354 | * already in the table. | |
1355 | */ | |
1356 | lttng_ht_add_unique_ulong(ust_app_ht_by_sock, <a->sock_n); | |
1357 | ||
5b4a0ec0 DG |
1358 | rcu_read_unlock(); |
1359 | ||
1360 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
852d0037 DG |
1361 | " (version %d.%d)", lta->pid, lta->ppid, lta->uid, lta->gid, |
1362 | lta->sock, lta->name, lta->v_major, lta->v_minor); | |
5b4a0ec0 DG |
1363 | |
1364 | return 0; | |
1365 | } | |
1366 | ||
1367 | /* | |
1368 | * Unregister app by removing it from the global traceable app list and freeing | |
1369 | * the data struct. | |
1370 | * | |
1371 | * The socket is already closed at this point so no close to sock. | |
1372 | */ | |
1373 | void ust_app_unregister(int sock) | |
1374 | { | |
1375 | struct ust_app *lta; | |
bec39940 DG |
1376 | struct lttng_ht_node_ulong *node; |
1377 | struct lttng_ht_iter iter; | |
525b0740 | 1378 | int ret; |
5b4a0ec0 DG |
1379 | |
1380 | rcu_read_lock(); | |
886459c6 | 1381 | |
5b4a0ec0 | 1382 | /* Get the node reference for a call_rcu */ |
852d0037 | 1383 | lttng_ht_lookup(ust_app_ht_by_sock, (void *)((unsigned long) sock), &iter); |
bec39940 | 1384 | node = lttng_ht_iter_get_node_ulong(&iter); |
5b4a0ec0 | 1385 | if (node == NULL) { |
852d0037 | 1386 | ERR("Unable to find app by sock %d", sock); |
5b4a0ec0 DG |
1387 | goto error; |
1388 | } | |
284d8f55 | 1389 | |
852d0037 DG |
1390 | lta = caa_container_of(node, struct ust_app, sock_n); |
1391 | ||
1392 | DBG("PID %d unregistering with sock %d", lta->pid, sock); | |
1393 | ||
886459c6 | 1394 | /* Remove application from PID hash table */ |
852d0037 DG |
1395 | ret = lttng_ht_del(ust_app_ht_by_sock, &iter); |
1396 | assert(!ret); | |
1397 | ||
1398 | /* Assign second node for deletion */ | |
1399 | iter.iter.node = <a->pid_n.node; | |
1400 | ||
bec39940 | 1401 | ret = lttng_ht_del(ust_app_ht, &iter); |
525b0740 | 1402 | assert(!ret); |
852d0037 DG |
1403 | |
1404 | /* Free memory */ | |
1405 | call_rcu(<a->pid_n.head, delete_ust_app_rcu); | |
1406 | ||
284d8f55 | 1407 | error: |
5b4a0ec0 DG |
1408 | rcu_read_unlock(); |
1409 | return; | |
284d8f55 DG |
1410 | } |
1411 | ||
1412 | /* | |
5b4a0ec0 | 1413 | * Return traceable_app_count |
284d8f55 | 1414 | */ |
5b4a0ec0 | 1415 | unsigned long ust_app_list_count(void) |
284d8f55 | 1416 | { |
5b4a0ec0 | 1417 | unsigned long count; |
284d8f55 | 1418 | |
5b4a0ec0 | 1419 | rcu_read_lock(); |
bec39940 | 1420 | count = lttng_ht_get_count(ust_app_ht); |
5b4a0ec0 | 1421 | rcu_read_unlock(); |
284d8f55 | 1422 | |
5b4a0ec0 | 1423 | return count; |
284d8f55 DG |
1424 | } |
1425 | ||
5b4a0ec0 DG |
1426 | /* |
1427 | * Fill events array with all events name of all registered apps. | |
1428 | */ | |
1429 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1430 | { |
5b4a0ec0 DG |
1431 | int ret, handle; |
1432 | size_t nbmem, count = 0; | |
bec39940 | 1433 | struct lttng_ht_iter iter; |
5b4a0ec0 DG |
1434 | struct ust_app *app; |
1435 | struct lttng_event *tmp; | |
421cb601 | 1436 | |
5b4a0ec0 DG |
1437 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1438 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1439 | if (tmp == NULL) { | |
1440 | PERROR("zmalloc ust app events"); | |
1441 | ret = -ENOMEM; | |
421cb601 DG |
1442 | goto error; |
1443 | } | |
1444 | ||
5b4a0ec0 | 1445 | rcu_read_lock(); |
421cb601 | 1446 | |
852d0037 | 1447 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
90eaa0d2 | 1448 | struct lttng_ust_tracepoint_iter uiter; |
ac3bd9c0 | 1449 | |
e0c7ec2b DG |
1450 | if (!app->compatible) { |
1451 | /* | |
1452 | * TODO: In time, we should notice the caller of this error by | |
1453 | * telling him that this is a version error. | |
1454 | */ | |
1455 | continue; | |
1456 | } | |
852d0037 | 1457 | handle = ustctl_tracepoint_list(app->sock); |
5b4a0ec0 DG |
1458 | if (handle < 0) { |
1459 | ERR("UST app list events getting handle failed for app pid %d", | |
852d0037 | 1460 | app->pid); |
5b4a0ec0 DG |
1461 | continue; |
1462 | } | |
421cb601 | 1463 | |
852d0037 | 1464 | while ((ret = ustctl_tracepoint_list_get(app->sock, handle, |
90eaa0d2 | 1465 | &uiter)) != -ENOENT) { |
815564d8 MD |
1466 | if (count >= nbmem) { |
1467 | DBG2("Reallocating event list from %zu to %zu entries", nbmem, | |
1468 | 2 * nbmem); | |
1469 | nbmem *= 2; | |
2f221590 | 1470 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event)); |
5b4a0ec0 DG |
1471 | if (tmp == NULL) { |
1472 | PERROR("realloc ust app events"); | |
1473 | ret = -ENOMEM; | |
1474 | goto rcu_error; | |
1475 | } | |
1476 | } | |
90eaa0d2 | 1477 | memcpy(tmp[count].name, uiter.name, LTTNG_UST_SYM_NAME_LEN); |
8005f29a | 1478 | tmp[count].loglevel = uiter.loglevel; |
9fbaebcf | 1479 | tmp[count].type = (enum lttng_event_type) LTTNG_UST_TRACEPOINT; |
852d0037 | 1480 | tmp[count].pid = app->pid; |
5b4a0ec0 DG |
1481 | tmp[count].enabled = -1; |
1482 | count++; | |
421cb601 | 1483 | } |
421cb601 DG |
1484 | } |
1485 | ||
5b4a0ec0 DG |
1486 | ret = count; |
1487 | *events = tmp; | |
421cb601 | 1488 | |
5b4a0ec0 | 1489 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1490 | |
5b4a0ec0 DG |
1491 | rcu_error: |
1492 | rcu_read_unlock(); | |
421cb601 | 1493 | error: |
5b4a0ec0 | 1494 | return ret; |
421cb601 DG |
1495 | } |
1496 | ||
5b4a0ec0 DG |
1497 | /* |
1498 | * Free and clean all traceable apps of the global list. | |
1499 | */ | |
1500 | void ust_app_clean_list(void) | |
421cb601 | 1501 | { |
5b4a0ec0 | 1502 | int ret; |
bec39940 DG |
1503 | struct lttng_ht_iter iter; |
1504 | struct lttng_ht_node_ulong *node; | |
421cb601 | 1505 | |
5b4a0ec0 | 1506 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1507 | |
5b4a0ec0 | 1508 | rcu_read_lock(); |
421cb601 | 1509 | |
bec39940 DG |
1510 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, node, node) { |
1511 | ret = lttng_ht_del(ust_app_ht, &iter); | |
525b0740 | 1512 | assert(!ret); |
bec39940 | 1513 | call_rcu(&node->head, delete_ust_app_rcu); |
421cb601 DG |
1514 | } |
1515 | ||
852d0037 DG |
1516 | /* Cleanup socket hash table */ |
1517 | cds_lfht_for_each_entry(ust_app_ht_by_sock->ht, &iter.iter, node, node) { | |
1518 | ret = lttng_ht_del(ust_app_ht_by_sock, &iter); | |
bec39940 DG |
1519 | assert(!ret); |
1520 | } | |
852d0037 | 1521 | |
bec39940 | 1522 | /* Destroy is done only when the ht is empty */ |
852d0037 DG |
1523 | lttng_ht_destroy(ust_app_ht); |
1524 | lttng_ht_destroy(ust_app_ht_by_sock); | |
421cb601 | 1525 | |
5b4a0ec0 DG |
1526 | rcu_read_unlock(); |
1527 | } | |
1528 | ||
1529 | /* | |
1530 | * Init UST app hash table. | |
1531 | */ | |
1532 | void ust_app_ht_alloc(void) | |
1533 | { | |
bec39940 | 1534 | ust_app_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
852d0037 | 1535 | ust_app_ht_by_sock = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
421cb601 DG |
1536 | } |
1537 | ||
78f0bacd DG |
1538 | /* |
1539 | * For a specific UST session, disable the channel for all registered apps. | |
1540 | */ | |
35a9059d | 1541 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1542 | struct ltt_ust_channel *uchan) |
1543 | { | |
1544 | int ret = 0; | |
bec39940 DG |
1545 | struct lttng_ht_iter iter; |
1546 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1547 | struct ust_app *app; |
1548 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1549 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1550 | |
1551 | if (usess == NULL || uchan == NULL) { | |
1552 | ERR("Disabling UST global channel with NULL values"); | |
1553 | ret = -1; | |
1554 | goto error; | |
1555 | } | |
1556 | ||
a991f516 MD |
1557 | DBG2("UST app disabling channel %s from global domain for session id %d", |
1558 | uchan->name, usess->id); | |
78f0bacd DG |
1559 | |
1560 | rcu_read_lock(); | |
1561 | ||
1562 | /* For every registered applications */ | |
852d0037 | 1563 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
bec39940 | 1564 | struct lttng_ht_iter uiter; |
e0c7ec2b DG |
1565 | if (!app->compatible) { |
1566 | /* | |
1567 | * TODO: In time, we should notice the caller of this error by | |
1568 | * telling him that this is a version error. | |
1569 | */ | |
1570 | continue; | |
1571 | } | |
78f0bacd DG |
1572 | ua_sess = lookup_session_by_app(usess, app); |
1573 | if (ua_sess == NULL) { | |
1574 | continue; | |
1575 | } | |
1576 | ||
8535a6d9 | 1577 | /* Get channel */ |
bec39940 DG |
1578 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1579 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
8535a6d9 DG |
1580 | /* If the session if found for the app, the channel must be there */ |
1581 | assert(ua_chan_node); | |
1582 | ||
1583 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1584 | /* The channel must not be already disabled */ | |
1585 | assert(ua_chan->enabled == 1); | |
1586 | ||
1587 | /* Disable channel onto application */ | |
1588 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1589 | if (ret < 0) { |
1590 | /* XXX: We might want to report this error at some point... */ | |
1591 | continue; | |
1592 | } | |
1593 | } | |
1594 | ||
1595 | rcu_read_unlock(); | |
1596 | ||
1597 | error: | |
1598 | return ret; | |
1599 | } | |
1600 | ||
1601 | /* | |
1602 | * For a specific UST session, enable the channel for all registered apps. | |
1603 | */ | |
35a9059d | 1604 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1605 | struct ltt_ust_channel *uchan) |
1606 | { | |
1607 | int ret = 0; | |
bec39940 | 1608 | struct lttng_ht_iter iter; |
78f0bacd DG |
1609 | struct ust_app *app; |
1610 | struct ust_app_session *ua_sess; | |
1611 | ||
1612 | if (usess == NULL || uchan == NULL) { | |
1613 | ERR("Adding UST global channel to NULL values"); | |
1614 | ret = -1; | |
1615 | goto error; | |
1616 | } | |
1617 | ||
a991f516 MD |
1618 | DBG2("UST app enabling channel %s to global domain for session id %d", |
1619 | uchan->name, usess->id); | |
78f0bacd DG |
1620 | |
1621 | rcu_read_lock(); | |
1622 | ||
1623 | /* For every registered applications */ | |
852d0037 | 1624 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1625 | if (!app->compatible) { |
1626 | /* | |
1627 | * TODO: In time, we should notice the caller of this error by | |
1628 | * telling him that this is a version error. | |
1629 | */ | |
1630 | continue; | |
1631 | } | |
78f0bacd DG |
1632 | ua_sess = lookup_session_by_app(usess, app); |
1633 | if (ua_sess == NULL) { | |
1634 | continue; | |
1635 | } | |
1636 | ||
1637 | /* Enable channel onto application */ | |
1638 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1639 | if (ret < 0) { | |
1640 | /* XXX: We might want to report this error at some point... */ | |
1641 | continue; | |
1642 | } | |
1643 | } | |
1644 | ||
1645 | rcu_read_unlock(); | |
1646 | ||
1647 | error: | |
1648 | return ret; | |
1649 | } | |
1650 | ||
b0a40d28 DG |
1651 | /* |
1652 | * Disable an event in a channel and for a specific session. | |
1653 | */ | |
35a9059d DG |
1654 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
1655 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
1656 | { |
1657 | int ret = 0; | |
bec39940 DG |
1658 | struct lttng_ht_iter iter, uiter; |
1659 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
b0a40d28 DG |
1660 | struct ust_app *app; |
1661 | struct ust_app_session *ua_sess; | |
1662 | struct ust_app_channel *ua_chan; | |
1663 | struct ust_app_event *ua_event; | |
1664 | ||
1665 | DBG("UST app disabling event %s for all apps in channel " | |
a991f516 | 1666 | "%s for session id %d", uevent->attr.name, uchan->name, usess->id); |
b0a40d28 DG |
1667 | |
1668 | rcu_read_lock(); | |
1669 | ||
1670 | /* For all registered applications */ | |
852d0037 | 1671 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1672 | if (!app->compatible) { |
1673 | /* | |
1674 | * TODO: In time, we should notice the caller of this error by | |
1675 | * telling him that this is a version error. | |
1676 | */ | |
1677 | continue; | |
1678 | } | |
b0a40d28 DG |
1679 | ua_sess = lookup_session_by_app(usess, app); |
1680 | if (ua_sess == NULL) { | |
1681 | /* Next app */ | |
1682 | continue; | |
1683 | } | |
1684 | ||
1685 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1686 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1687 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 | 1688 | if (ua_chan_node == NULL) { |
a991f516 | 1689 | DBG2("Channel %s not found in session id %d for app pid %d." |
852d0037 | 1690 | "Skipping", uchan->name, usess->id, app->pid); |
b0a40d28 DG |
1691 | continue; |
1692 | } | |
1693 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1694 | ||
bec39940 DG |
1695 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
1696 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 DG |
1697 | if (ua_event_node == NULL) { |
1698 | DBG2("Event %s not found in channel %s for app pid %d." | |
852d0037 | 1699 | "Skipping", uevent->attr.name, uchan->name, app->pid); |
b0a40d28 DG |
1700 | continue; |
1701 | } | |
1702 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1703 | ||
7f79d3a1 | 1704 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
b0a40d28 DG |
1705 | if (ret < 0) { |
1706 | /* XXX: Report error someday... */ | |
1707 | continue; | |
1708 | } | |
1709 | } | |
1710 | ||
1711 | rcu_read_unlock(); | |
1712 | ||
1713 | return ret; | |
1714 | } | |
1715 | ||
9730260e | 1716 | /* |
edb67388 | 1717 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
1718 | * registered apps. |
1719 | */ | |
35a9059d | 1720 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
1721 | struct ltt_ust_channel *uchan) |
1722 | { | |
1723 | int ret = 0; | |
bec39940 DG |
1724 | struct lttng_ht_iter iter, uiter; |
1725 | struct lttng_ht_node_str *ua_chan_node; | |
9730260e DG |
1726 | struct ust_app *app; |
1727 | struct ust_app_session *ua_sess; | |
1728 | struct ust_app_channel *ua_chan; | |
1729 | struct ust_app_event *ua_event; | |
1730 | ||
1731 | DBG("UST app disabling all event for all apps in channel " | |
a991f516 | 1732 | "%s for session id %d", uchan->name, usess->id); |
9730260e DG |
1733 | |
1734 | rcu_read_lock(); | |
1735 | ||
1736 | /* For all registered applications */ | |
852d0037 | 1737 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1738 | if (!app->compatible) { |
1739 | /* | |
1740 | * TODO: In time, we should notice the caller of this error by | |
1741 | * telling him that this is a version error. | |
1742 | */ | |
1743 | continue; | |
1744 | } | |
9730260e | 1745 | ua_sess = lookup_session_by_app(usess, app); |
edb67388 DG |
1746 | /* If ua_sess is NULL, there is a code flow error */ |
1747 | assert(ua_sess); | |
9730260e DG |
1748 | |
1749 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1750 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1751 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1752 | /* If the channel is not found, there is a code flow error */ |
1753 | assert(ua_chan_node); | |
1754 | ||
9730260e DG |
1755 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1756 | ||
1757 | /* Disable each events of channel */ | |
bec39940 DG |
1758 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
1759 | node.node) { | |
7f79d3a1 | 1760 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
9730260e DG |
1761 | if (ret < 0) { |
1762 | /* XXX: Report error someday... */ | |
1763 | continue; | |
1764 | } | |
1765 | } | |
1766 | } | |
1767 | ||
1768 | rcu_read_unlock(); | |
1769 | ||
1770 | return ret; | |
1771 | } | |
1772 | ||
421cb601 | 1773 | /* |
5b4a0ec0 | 1774 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1775 | */ |
35a9059d | 1776 | int ust_app_create_channel_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1777 | struct ltt_ust_channel *uchan) |
1778 | { | |
bec39940 | 1779 | struct lttng_ht_iter iter; |
48842b30 DG |
1780 | struct ust_app *app; |
1781 | struct ust_app_session *ua_sess; | |
1782 | struct ust_app_channel *ua_chan; | |
1783 | ||
fc34caaa DG |
1784 | /* Very wrong code flow */ |
1785 | assert(usess); | |
1786 | assert(uchan); | |
421cb601 | 1787 | |
a991f516 MD |
1788 | DBG2("UST app adding channel %s to global domain for session id %d", |
1789 | uchan->name, usess->id); | |
48842b30 DG |
1790 | |
1791 | rcu_read_lock(); | |
421cb601 | 1792 | |
5b4a0ec0 | 1793 | /* For every registered applications */ |
852d0037 | 1794 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1795 | if (!app->compatible) { |
1796 | /* | |
1797 | * TODO: In time, we should notice the caller of this error by | |
1798 | * telling him that this is a version error. | |
1799 | */ | |
1800 | continue; | |
1801 | } | |
edb67388 DG |
1802 | /* |
1803 | * Create session on the tracer side and add it to app session HT. Note | |
1804 | * that if session exist, it will simply return a pointer to the ust | |
1805 | * app session. | |
1806 | */ | |
421cb601 | 1807 | ua_sess = create_ust_app_session(usess, app); |
509cbaf8 | 1808 | if (ua_sess == NULL) { |
915d047c | 1809 | /* The malloc() failed. */ |
fc34caaa | 1810 | goto error; |
915d047c DG |
1811 | } else if (ua_sess == (void *) -1UL) { |
1812 | /* The application's socket is not valid. Contiuing */ | |
1813 | continue; | |
48842b30 DG |
1814 | } |
1815 | ||
421cb601 DG |
1816 | /* Create channel onto application */ |
1817 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1818 | if (ua_chan == NULL) { | |
fc34caaa DG |
1819 | /* Major problem here and it's maybe the tracer or malloc() */ |
1820 | goto error; | |
48842b30 | 1821 | } |
48842b30 | 1822 | } |
5b4a0ec0 | 1823 | |
48842b30 DG |
1824 | rcu_read_unlock(); |
1825 | ||
fc34caaa DG |
1826 | return 0; |
1827 | ||
421cb601 | 1828 | error: |
fc34caaa | 1829 | return -1; |
48842b30 DG |
1830 | } |
1831 | ||
5b4a0ec0 | 1832 | /* |
edb67388 | 1833 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 1834 | */ |
35a9059d | 1835 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1836 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1837 | { | |
1838 | int ret = 0; | |
bec39940 DG |
1839 | struct lttng_ht_iter iter, uiter; |
1840 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
48842b30 DG |
1841 | struct ust_app *app; |
1842 | struct ust_app_session *ua_sess; | |
1843 | struct ust_app_channel *ua_chan; | |
1844 | struct ust_app_event *ua_event; | |
48842b30 | 1845 | |
a991f516 MD |
1846 | DBG("UST app enabling event %s for all apps for session id %d", |
1847 | uevent->attr.name, usess->id); | |
48842b30 | 1848 | |
edb67388 DG |
1849 | /* |
1850 | * NOTE: At this point, this function is called only if the session and | |
1851 | * channel passed are already created for all apps. and enabled on the | |
1852 | * tracer also. | |
1853 | */ | |
1854 | ||
48842b30 | 1855 | rcu_read_lock(); |
421cb601 DG |
1856 | |
1857 | /* For all registered applications */ | |
852d0037 | 1858 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1859 | if (!app->compatible) { |
1860 | /* | |
1861 | * TODO: In time, we should notice the caller of this error by | |
1862 | * telling him that this is a version error. | |
1863 | */ | |
1864 | continue; | |
1865 | } | |
edb67388 DG |
1866 | ua_sess = lookup_session_by_app(usess, app); |
1867 | /* If ua_sess is NULL, there is a code flow error */ | |
1868 | assert(ua_sess); | |
ba767faf | 1869 | |
edb67388 | 1870 | /* Lookup channel in the ust app session */ |
bec39940 DG |
1871 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1872 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1873 | /* If the channel is not found, there is a code flow error */ |
1874 | assert(ua_chan_node); | |
1875 | ||
1876 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1877 | ||
bec39940 DG |
1878 | lttng_ht_lookup(ua_chan->events, (void*)uevent->attr.name, &uiter); |
1879 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
35a9059d | 1880 | if (ua_event_node == NULL) { |
7f79d3a1 | 1881 | DBG3("UST app enable event %s not found for app PID %d." |
852d0037 | 1882 | "Skipping app", uevent->attr.name, app->pid); |
35a9059d DG |
1883 | continue; |
1884 | } | |
1885 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1886 | ||
1887 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
1888 | if (ret < 0) { | |
7f79d3a1 | 1889 | goto error; |
48842b30 | 1890 | } |
edb67388 DG |
1891 | } |
1892 | ||
7f79d3a1 | 1893 | error: |
edb67388 | 1894 | rcu_read_unlock(); |
edb67388 DG |
1895 | return ret; |
1896 | } | |
1897 | ||
1898 | /* | |
1899 | * For a specific existing UST session and UST channel, creates the event for | |
1900 | * all registered apps. | |
1901 | */ | |
35a9059d | 1902 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
1903 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1904 | { | |
1905 | int ret = 0; | |
bec39940 DG |
1906 | struct lttng_ht_iter iter, uiter; |
1907 | struct lttng_ht_node_str *ua_chan_node; | |
edb67388 DG |
1908 | struct ust_app *app; |
1909 | struct ust_app_session *ua_sess; | |
1910 | struct ust_app_channel *ua_chan; | |
1911 | ||
a991f516 MD |
1912 | DBG("UST app creating event %s for all apps for session id %d", |
1913 | uevent->attr.name, usess->id); | |
edb67388 | 1914 | |
edb67388 DG |
1915 | rcu_read_lock(); |
1916 | ||
1917 | /* For all registered applications */ | |
852d0037 | 1918 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1919 | if (!app->compatible) { |
1920 | /* | |
1921 | * TODO: In time, we should notice the caller of this error by | |
1922 | * telling him that this is a version error. | |
1923 | */ | |
1924 | continue; | |
1925 | } | |
edb67388 DG |
1926 | ua_sess = lookup_session_by_app(usess, app); |
1927 | /* If ua_sess is NULL, there is a code flow error */ | |
1928 | assert(ua_sess); | |
48842b30 DG |
1929 | |
1930 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1931 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1932 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1933 | /* If the channel is not found, there is a code flow error */ |
1934 | assert(ua_chan_node); | |
1935 | ||
48842b30 DG |
1936 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1937 | ||
edb67388 DG |
1938 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1939 | if (ret < 0) { | |
fc34caaa DG |
1940 | if (ret != -EEXIST) { |
1941 | /* Possible value at this point: -ENOMEM. If so, we stop! */ | |
1942 | break; | |
1943 | } | |
1944 | DBG2("UST app event %s already exist on app PID %d", | |
852d0037 | 1945 | uevent->attr.name, app->pid); |
5b4a0ec0 | 1946 | continue; |
48842b30 | 1947 | } |
48842b30 | 1948 | } |
5b4a0ec0 | 1949 | |
48842b30 DG |
1950 | rcu_read_unlock(); |
1951 | ||
1952 | return ret; | |
1953 | } | |
1954 | ||
5b4a0ec0 DG |
1955 | /* |
1956 | * Start tracing for a specific UST session and app. | |
1957 | */ | |
421cb601 | 1958 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1959 | { |
1960 | int ret = 0; | |
bec39940 | 1961 | struct lttng_ht_iter iter; |
48842b30 DG |
1962 | struct ust_app_session *ua_sess; |
1963 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 1964 | struct ltt_ust_stream *ustream; |
7753dea8 | 1965 | int consumerd_fd; |
48842b30 | 1966 | |
852d0037 | 1967 | DBG("Starting tracing for ust app pid %d", app->pid); |
5cf5d0e7 | 1968 | |
509cbaf8 MD |
1969 | rcu_read_lock(); |
1970 | ||
e0c7ec2b DG |
1971 | if (!app->compatible) { |
1972 | goto end; | |
1973 | } | |
1974 | ||
421cb601 DG |
1975 | ua_sess = lookup_session_by_app(usess, app); |
1976 | if (ua_sess == NULL) { | |
509cbaf8 | 1977 | goto error_rcu_unlock; |
421cb601 | 1978 | } |
48842b30 | 1979 | |
aea829b3 DG |
1980 | /* Upon restart, we skip the setup, already done */ |
1981 | if (ua_sess->started) { | |
8be98f9a | 1982 | goto skip_setup; |
aea829b3 | 1983 | } |
8be98f9a | 1984 | |
f848c3eb DG |
1985 | /* Indicate that the session has been started once */ |
1986 | ua_sess->started = 1; | |
1987 | ||
421cb601 DG |
1988 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1989 | if (ret < 0) { | |
509cbaf8 | 1990 | goto error_rcu_unlock; |
421cb601 | 1991 | } |
48842b30 | 1992 | |
421cb601 | 1993 | /* For each channel */ |
bec39940 DG |
1994 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
1995 | node.node) { | |
421cb601 DG |
1996 | /* Create all streams */ |
1997 | while (1) { | |
5b4a0ec0 | 1998 | /* Create UST stream */ |
421cb601 DG |
1999 | ustream = zmalloc(sizeof(*ustream)); |
2000 | if (ustream == NULL) { | |
2001 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 2002 | goto error_rcu_unlock; |
421cb601 | 2003 | } |
48842b30 | 2004 | |
4063050c MD |
2005 | /* We are going to receive 2 fds, we need to reserve them. */ |
2006 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
2007 | if (ret < 0) { | |
2008 | ERR("Exhausted number of available FD upon stream create"); | |
2009 | free(ustream); | |
2010 | goto error_rcu_unlock; | |
2011 | } | |
852d0037 | 2012 | ret = ustctl_create_stream(app->sock, ua_chan->obj, |
421cb601 | 2013 | &ustream->obj); |
48842b30 | 2014 | if (ret < 0) { |
421cb601 | 2015 | /* Got all streams */ |
4063050c | 2016 | lttng_fd_put(LTTNG_FD_APPS, 2); |
a2c0da86 | 2017 | free(ustream); |
421cb601 | 2018 | break; |
48842b30 | 2019 | } |
421cb601 | 2020 | ustream->handle = ustream->obj->handle; |
48842b30 | 2021 | |
421cb601 DG |
2022 | /* Order is important */ |
2023 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
477d7741 MD |
2024 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", |
2025 | ua_sess->path, ua_chan->name, | |
2026 | ua_chan->streams.count++); | |
aba8e916 DG |
2027 | if (ret < 0) { |
2028 | PERROR("asprintf UST create stream"); | |
a2c0da86 MD |
2029 | /* |
2030 | * XXX what should we do here with the | |
2031 | * stream ? | |
2032 | */ | |
421cb601 | 2033 | continue; |
aba8e916 | 2034 | } |
421cb601 DG |
2035 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
2036 | ustream->pathname); | |
2037 | } | |
421cb601 | 2038 | } |
aba8e916 | 2039 | |
7753dea8 MD |
2040 | switch (app->bits_per_long) { |
2041 | case 64: | |
2042 | consumerd_fd = ust_consumerd64_fd; | |
2043 | break; | |
2044 | case 32: | |
2045 | consumerd_fd = ust_consumerd32_fd; | |
2046 | break; | |
2047 | default: | |
2048 | ret = -EINVAL; | |
2049 | goto error_rcu_unlock; | |
2050 | } | |
aea829b3 | 2051 | |
421cb601 | 2052 | /* Setup UST consumer socket and send fds to it */ |
7753dea8 | 2053 | ret = ust_consumer_send_session(consumerd_fd, ua_sess); |
421cb601 | 2054 | if (ret < 0) { |
509cbaf8 | 2055 | goto error_rcu_unlock; |
421cb601 | 2056 | } |
48842b30 | 2057 | |
840a7334 CB |
2058 | /* Ask UST to open the write side of the wait pipe */ |
2059 | DBG("Asking UST to open metadata stream wait pipe path: %s\n", | |
2060 | ua_sess->metadata->stream_obj->wait_pipe_path); | |
2061 | ||
2062 | ret = ustctl_open_wait_pipe(app->sock, ua_sess->metadata->obj); | |
2063 | ||
2064 | if (ret < 0) { | |
2065 | ERR("Asking UST to open wait_pipe failed"); | |
2066 | } | |
2067 | ||
2068 | /* each channel */ | |
2069 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, | |
2070 | node.node) { | |
2071 | ||
2072 | DBG("Asking UST to open channel wait pipe path: %s\n", | |
2073 | ua_chan->obj->wait_pipe_path); | |
2074 | ||
2075 | ret = ustctl_open_wait_pipe(app->sock, ua_chan->obj); | |
2076 | ||
2077 | if (ret < 0) { | |
2078 | ERR("Asking UST to open wait_pipe failed for wait pipe: %s", | |
2079 | ua_chan->obj->wait_pipe_path); | |
2080 | } | |
2081 | } | |
2082 | ||
8be98f9a | 2083 | skip_setup: |
421cb601 | 2084 | /* This start the UST tracing */ |
852d0037 | 2085 | ret = ustctl_start_session(app->sock, ua_sess->handle); |
421cb601 | 2086 | if (ret < 0) { |
852d0037 | 2087 | ERR("Error starting tracing for app pid: %d", app->pid); |
509cbaf8 | 2088 | goto error_rcu_unlock; |
421cb601 | 2089 | } |
5b4a0ec0 | 2090 | |
421cb601 | 2091 | /* Quiescent wait after starting trace */ |
852d0037 | 2092 | ustctl_wait_quiescent(app->sock); |
48842b30 | 2093 | |
e0c7ec2b DG |
2094 | end: |
2095 | rcu_read_unlock(); | |
421cb601 | 2096 | return 0; |
48842b30 | 2097 | |
509cbaf8 MD |
2098 | error_rcu_unlock: |
2099 | rcu_read_unlock(); | |
421cb601 DG |
2100 | return -1; |
2101 | } | |
48842b30 | 2102 | |
8be98f9a MD |
2103 | /* |
2104 | * Stop tracing for a specific UST session and app. | |
2105 | */ | |
2106 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2107 | { | |
2108 | int ret = 0; | |
bec39940 | 2109 | struct lttng_ht_iter iter; |
8be98f9a | 2110 | struct ust_app_session *ua_sess; |
6d3686da | 2111 | struct ust_app_channel *ua_chan; |
8be98f9a | 2112 | |
852d0037 | 2113 | DBG("Stopping tracing for ust app pid %d", app->pid); |
8be98f9a MD |
2114 | |
2115 | rcu_read_lock(); | |
2116 | ||
e0c7ec2b DG |
2117 | if (!app->compatible) { |
2118 | goto end; | |
2119 | } | |
2120 | ||
8be98f9a MD |
2121 | ua_sess = lookup_session_by_app(usess, app); |
2122 | if (ua_sess == NULL) { | |
2123 | /* Only malloc can failed so something is really wrong */ | |
2124 | goto error_rcu_unlock; | |
2125 | } | |
2126 | ||
9bc07046 DG |
2127 | /* |
2128 | * If started = 0, it means that stop trace has been called for a session | |
2129 | * that was never started. This is a code flow error and should never | |
2130 | * happen. | |
2131 | */ | |
2132 | assert(ua_sess->started == 1); | |
7db205b5 | 2133 | |
9d6c7d3f | 2134 | /* This inhibits UST tracing */ |
852d0037 | 2135 | ret = ustctl_stop_session(app->sock, ua_sess->handle); |
9d6c7d3f | 2136 | if (ret < 0) { |
852d0037 | 2137 | ERR("Error stopping tracing for app pid: %d", app->pid); |
9d6c7d3f DG |
2138 | goto error_rcu_unlock; |
2139 | } | |
2140 | ||
2141 | /* Quiescent wait after stopping trace */ | |
852d0037 | 2142 | ustctl_wait_quiescent(app->sock); |
9d6c7d3f DG |
2143 | |
2144 | /* Flushing buffers */ | |
bec39940 DG |
2145 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2146 | node.node) { | |
852d0037 | 2147 | ret = ustctl_sock_flush_buffer(app->sock, ua_chan->obj); |
8be98f9a | 2148 | if (ret < 0) { |
7db205b5 | 2149 | ERR("UST app PID %d channel %s flush failed with ret %d", |
852d0037 | 2150 | app->pid, ua_chan->name, ret); |
6d3686da DG |
2151 | /* Continuing flushing all buffers */ |
2152 | continue; | |
8be98f9a MD |
2153 | } |
2154 | } | |
8be98f9a | 2155 | |
90d97d10 | 2156 | /* Flush all buffers before stopping */ |
852d0037 | 2157 | ret = ustctl_sock_flush_buffer(app->sock, ua_sess->metadata->obj); |
90d97d10 | 2158 | if (ret < 0) { |
852d0037 | 2159 | ERR("UST app PID %d metadata flush failed with ret %d", app->pid, |
7db205b5 | 2160 | ret); |
90d97d10 DG |
2161 | } |
2162 | ||
7db205b5 DG |
2163 | end: |
2164 | rcu_read_unlock(); | |
8be98f9a MD |
2165 | return 0; |
2166 | ||
2167 | error_rcu_unlock: | |
2168 | rcu_read_unlock(); | |
2169 | return -1; | |
2170 | } | |
2171 | ||
84cd17c6 MD |
2172 | /* |
2173 | * Destroy a specific UST session in apps. | |
2174 | */ | |
2175 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2176 | { | |
2177 | struct ust_app_session *ua_sess; | |
2178 | struct lttng_ust_object_data obj; | |
bec39940 DG |
2179 | struct lttng_ht_iter iter; |
2180 | struct lttng_ht_node_ulong *node; | |
525b0740 | 2181 | int ret; |
84cd17c6 | 2182 | |
852d0037 | 2183 | DBG("Destroy tracing for ust app pid %d", app->pid); |
84cd17c6 MD |
2184 | |
2185 | rcu_read_lock(); | |
2186 | ||
e0c7ec2b DG |
2187 | if (!app->compatible) { |
2188 | goto end; | |
2189 | } | |
2190 | ||
84cd17c6 | 2191 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 2192 | node = lttng_ht_iter_get_node_ulong(&iter); |
84cd17c6 MD |
2193 | if (node == NULL) { |
2194 | /* Only malloc can failed so something is really wrong */ | |
2195 | goto error_rcu_unlock; | |
2196 | } | |
2197 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
bec39940 | 2198 | ret = lttng_ht_del(app->sessions, &iter); |
525b0740 | 2199 | assert(!ret); |
84cd17c6 MD |
2200 | obj.handle = ua_sess->handle; |
2201 | obj.shm_fd = -1; | |
2202 | obj.wait_fd = -1; | |
2203 | obj.memory_map_size = 0; | |
852d0037 | 2204 | ustctl_release_object(app->sock, &obj); |
84cd17c6 | 2205 | |
852d0037 | 2206 | delete_ust_app_session(app->sock, ua_sess); |
7db205b5 | 2207 | |
84cd17c6 | 2208 | /* Quiescent wait after stopping trace */ |
852d0037 | 2209 | ustctl_wait_quiescent(app->sock); |
84cd17c6 | 2210 | |
e0c7ec2b DG |
2211 | end: |
2212 | rcu_read_unlock(); | |
84cd17c6 MD |
2213 | return 0; |
2214 | ||
2215 | error_rcu_unlock: | |
2216 | rcu_read_unlock(); | |
2217 | return -1; | |
2218 | } | |
2219 | ||
5b4a0ec0 DG |
2220 | /* |
2221 | * Start tracing for the UST session. | |
2222 | */ | |
421cb601 DG |
2223 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
2224 | { | |
2225 | int ret = 0; | |
bec39940 | 2226 | struct lttng_ht_iter iter; |
421cb601 | 2227 | struct ust_app *app; |
48842b30 | 2228 | |
421cb601 DG |
2229 | DBG("Starting all UST traces"); |
2230 | ||
2231 | rcu_read_lock(); | |
421cb601 | 2232 | |
852d0037 | 2233 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
421cb601 | 2234 | ret = ust_app_start_trace(usess, app); |
48842b30 | 2235 | if (ret < 0) { |
5b4a0ec0 DG |
2236 | /* Continue to next apps even on error */ |
2237 | continue; | |
48842b30 | 2238 | } |
48842b30 | 2239 | } |
5b4a0ec0 | 2240 | |
48842b30 DG |
2241 | rcu_read_unlock(); |
2242 | ||
2243 | return 0; | |
2244 | } | |
487cf67c | 2245 | |
8be98f9a MD |
2246 | /* |
2247 | * Start tracing for the UST session. | |
2248 | */ | |
2249 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
2250 | { | |
2251 | int ret = 0; | |
bec39940 | 2252 | struct lttng_ht_iter iter; |
8be98f9a MD |
2253 | struct ust_app *app; |
2254 | ||
2255 | DBG("Stopping all UST traces"); | |
2256 | ||
2257 | rcu_read_lock(); | |
2258 | ||
852d0037 | 2259 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
8be98f9a MD |
2260 | ret = ust_app_stop_trace(usess, app); |
2261 | if (ret < 0) { | |
2262 | /* Continue to next apps even on error */ | |
2263 | continue; | |
2264 | } | |
2265 | } | |
2266 | ||
2267 | rcu_read_unlock(); | |
2268 | ||
2269 | return 0; | |
2270 | } | |
2271 | ||
84cd17c6 MD |
2272 | /* |
2273 | * Destroy app UST session. | |
2274 | */ | |
2275 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
2276 | { | |
2277 | int ret = 0; | |
bec39940 | 2278 | struct lttng_ht_iter iter; |
84cd17c6 MD |
2279 | struct ust_app *app; |
2280 | ||
2281 | DBG("Destroy all UST traces"); | |
2282 | ||
2283 | rcu_read_lock(); | |
2284 | ||
852d0037 | 2285 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
84cd17c6 MD |
2286 | ret = ust_app_destroy_trace(usess, app); |
2287 | if (ret < 0) { | |
2288 | /* Continue to next apps even on error */ | |
2289 | continue; | |
2290 | } | |
2291 | } | |
2292 | ||
2293 | rcu_read_unlock(); | |
2294 | ||
2295 | return 0; | |
2296 | } | |
2297 | ||
5b4a0ec0 DG |
2298 | /* |
2299 | * Add channels/events from UST global domain to registered apps at sock. | |
2300 | */ | |
487cf67c DG |
2301 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
2302 | { | |
55c54cce | 2303 | int ret = 0; |
727d5404 | 2304 | struct lttng_ht_iter iter, uiter, iter_ctx; |
487cf67c DG |
2305 | struct ust_app *app; |
2306 | struct ust_app_session *ua_sess; | |
2307 | struct ust_app_channel *ua_chan; | |
2308 | struct ust_app_event *ua_event; | |
727d5404 | 2309 | struct ust_app_ctx *ua_ctx; |
1f3580c7 DG |
2310 | |
2311 | if (usess == NULL) { | |
5b4a0ec0 | 2312 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
2313 | goto error; |
2314 | } | |
2315 | ||
a991f516 MD |
2316 | DBG2("UST app global update for app sock %d for session id %d", sock, |
2317 | usess->id); | |
487cf67c | 2318 | |
284d8f55 DG |
2319 | rcu_read_lock(); |
2320 | ||
487cf67c DG |
2321 | app = find_app_by_sock(sock); |
2322 | if (app == NULL) { | |
2323 | ERR("Failed to update app sock %d", sock); | |
2324 | goto error; | |
2325 | } | |
2326 | ||
e0c7ec2b DG |
2327 | if (!app->compatible) { |
2328 | goto error; | |
2329 | } | |
2330 | ||
421cb601 | 2331 | ua_sess = create_ust_app_session(usess, app); |
a78732df | 2332 | if (ua_sess == NULL || ua_sess == (void *) -1UL) { |
487cf67c DG |
2333 | goto error; |
2334 | } | |
2335 | ||
284d8f55 DG |
2336 | /* |
2337 | * We can iterate safely here over all UST app session sicne the create ust | |
2338 | * app session above made a shadow copy of the UST global domain from the | |
2339 | * ltt ust session. | |
2340 | */ | |
bec39940 DG |
2341 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2342 | node.node) { | |
284d8f55 DG |
2343 | ret = create_ust_channel(app, ua_sess, ua_chan); |
2344 | if (ret < 0) { | |
2345 | /* FIXME: Should we quit here or continue... */ | |
2346 | continue; | |
487cf67c DG |
2347 | } |
2348 | ||
727d5404 DG |
2349 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter_ctx.iter, ua_ctx, |
2350 | node.node) { | |
2351 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
2352 | if (ret < 0) { | |
2353 | /* FIXME: Should we quit here or continue... */ | |
2354 | continue; | |
2355 | } | |
2356 | } | |
2357 | ||
2358 | ||
284d8f55 | 2359 | /* For each events */ |
bec39940 DG |
2360 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
2361 | node.node) { | |
284d8f55 DG |
2362 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
2363 | if (ret < 0) { | |
2364 | /* FIXME: Should we quit here or continue... */ | |
2365 | continue; | |
487cf67c | 2366 | } |
727d5404 DG |
2367 | |
2368 | /* Add context on events. */ | |
2369 | cds_lfht_for_each_entry(ua_event->ctx->ht, &iter_ctx.iter, | |
2370 | ua_ctx, node.node) { | |
2371 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
2372 | if (ret < 0) { | |
2373 | /* FIXME: Should we quit here or continue... */ | |
2374 | continue; | |
2375 | } | |
2376 | } | |
36dc12cc | 2377 | } |
487cf67c DG |
2378 | } |
2379 | ||
36dc12cc | 2380 | if (usess->start_trace) { |
421cb601 | 2381 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 2382 | if (ret < 0) { |
36dc12cc DG |
2383 | goto error; |
2384 | } | |
2385 | ||
852d0037 | 2386 | DBG2("UST trace started for app pid %d", app->pid); |
36dc12cc DG |
2387 | } |
2388 | ||
487cf67c DG |
2389 | error: |
2390 | rcu_read_unlock(); | |
2391 | return; | |
2392 | } | |
55cc08a6 DG |
2393 | |
2394 | /* | |
2395 | * Add context to a specific channel for global UST domain. | |
2396 | */ | |
2397 | int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess, | |
2398 | struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx) | |
2399 | { | |
2400 | int ret = 0; | |
bec39940 DG |
2401 | struct lttng_ht_node_str *ua_chan_node; |
2402 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2403 | struct ust_app_channel *ua_chan = NULL; |
2404 | struct ust_app_session *ua_sess; | |
2405 | struct ust_app *app; | |
2406 | ||
2407 | rcu_read_lock(); | |
2408 | ||
852d0037 | 2409 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2410 | if (!app->compatible) { |
2411 | /* | |
2412 | * TODO: In time, we should notice the caller of this error by | |
2413 | * telling him that this is a version error. | |
2414 | */ | |
2415 | continue; | |
2416 | } | |
55cc08a6 DG |
2417 | ua_sess = lookup_session_by_app(usess, app); |
2418 | if (ua_sess == NULL) { | |
2419 | continue; | |
2420 | } | |
2421 | ||
2422 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2423 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2424 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2425 | if (ua_chan_node == NULL) { |
2426 | continue; | |
2427 | } | |
2428 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2429 | node); | |
2430 | ||
2431 | ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app); | |
2432 | if (ret < 0) { | |
2433 | continue; | |
2434 | } | |
2435 | } | |
2436 | ||
55cc08a6 DG |
2437 | rcu_read_unlock(); |
2438 | return ret; | |
2439 | } | |
2440 | ||
2441 | /* | |
2442 | * Add context to a specific event in a channel for global UST domain. | |
2443 | */ | |
2444 | int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess, | |
2445 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
2446 | struct ltt_ust_context *uctx) | |
2447 | { | |
2448 | int ret = 0; | |
bec39940 DG |
2449 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; |
2450 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2451 | struct ust_app_session *ua_sess; |
2452 | struct ust_app_event *ua_event; | |
2453 | struct ust_app_channel *ua_chan = NULL; | |
2454 | struct ust_app *app; | |
2455 | ||
2456 | rcu_read_lock(); | |
2457 | ||
852d0037 | 2458 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2459 | if (!app->compatible) { |
2460 | /* | |
2461 | * TODO: In time, we should notice the caller of this error by | |
2462 | * telling him that this is a version error. | |
2463 | */ | |
2464 | continue; | |
2465 | } | |
55cc08a6 DG |
2466 | ua_sess = lookup_session_by_app(usess, app); |
2467 | if (ua_sess == NULL) { | |
2468 | continue; | |
2469 | } | |
2470 | ||
2471 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2472 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2473 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2474 | if (ua_chan_node == NULL) { |
2475 | continue; | |
2476 | } | |
2477 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2478 | node); | |
2479 | ||
bec39940 DG |
2480 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
2481 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2482 | if (ua_event_node == NULL) { |
2483 | continue; | |
2484 | } | |
2485 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, | |
2486 | node); | |
2487 | ||
2488 | ret = create_ust_app_event_context(ua_sess, ua_event, &uctx->ctx, app); | |
2489 | if (ret < 0) { | |
2490 | continue; | |
2491 | } | |
2492 | } | |
2493 | ||
55cc08a6 DG |
2494 | rcu_read_unlock(); |
2495 | return ret; | |
2496 | } | |
76d45b40 DG |
2497 | |
2498 | /* | |
2499 | * Enable event for a channel from a UST session for a specific PID. | |
2500 | */ | |
2501 | int ust_app_enable_event_pid(struct ltt_ust_session *usess, | |
2502 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2503 | { | |
2504 | int ret = 0; | |
bec39940 DG |
2505 | struct lttng_ht_iter iter; |
2506 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
76d45b40 DG |
2507 | struct ust_app *app; |
2508 | struct ust_app_session *ua_sess; | |
2509 | struct ust_app_channel *ua_chan; | |
2510 | struct ust_app_event *ua_event; | |
2511 | ||
2512 | DBG("UST app enabling event %s for PID %d", uevent->attr.name, pid); | |
2513 | ||
2514 | rcu_read_lock(); | |
2515 | ||
2516 | app = ust_app_find_by_pid(pid); | |
2517 | if (app == NULL) { | |
2518 | ERR("UST app enable event per PID %d not found", pid); | |
2519 | ret = -1; | |
2520 | goto error; | |
2521 | } | |
2522 | ||
e0c7ec2b DG |
2523 | if (!app->compatible) { |
2524 | ret = 0; | |
2525 | goto error; | |
2526 | } | |
2527 | ||
76d45b40 DG |
2528 | ua_sess = lookup_session_by_app(usess, app); |
2529 | /* If ua_sess is NULL, there is a code flow error */ | |
2530 | assert(ua_sess); | |
2531 | ||
2532 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2533 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2534 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2535 | /* If the channel is not found, there is a code flow error */ |
2536 | assert(ua_chan_node); | |
2537 | ||
2538 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2539 | ||
bec39940 DG |
2540 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2541 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2542 | if (ua_event_node == NULL) { |
2543 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); | |
2544 | if (ret < 0) { | |
2545 | goto error; | |
2546 | } | |
2547 | } else { | |
2548 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2549 | ||
2550 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2551 | if (ret < 0) { | |
2552 | goto error; | |
2553 | } | |
2554 | } | |
2555 | ||
2556 | error: | |
2557 | rcu_read_unlock(); | |
2558 | return ret; | |
2559 | } | |
7f79d3a1 DG |
2560 | |
2561 | /* | |
2562 | * Disable event for a channel from a UST session for a specific PID. | |
2563 | */ | |
2564 | int ust_app_disable_event_pid(struct ltt_ust_session *usess, | |
2565 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2566 | { | |
2567 | int ret = 0; | |
bec39940 DG |
2568 | struct lttng_ht_iter iter; |
2569 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
7f79d3a1 DG |
2570 | struct ust_app *app; |
2571 | struct ust_app_session *ua_sess; | |
2572 | struct ust_app_channel *ua_chan; | |
2573 | struct ust_app_event *ua_event; | |
2574 | ||
2575 | DBG("UST app disabling event %s for PID %d", uevent->attr.name, pid); | |
2576 | ||
2577 | rcu_read_lock(); | |
2578 | ||
2579 | app = ust_app_find_by_pid(pid); | |
2580 | if (app == NULL) { | |
2581 | ERR("UST app disable event per PID %d not found", pid); | |
2582 | ret = -1; | |
2583 | goto error; | |
2584 | } | |
2585 | ||
e0c7ec2b DG |
2586 | if (!app->compatible) { |
2587 | ret = 0; | |
2588 | goto error; | |
2589 | } | |
2590 | ||
7f79d3a1 DG |
2591 | ua_sess = lookup_session_by_app(usess, app); |
2592 | /* If ua_sess is NULL, there is a code flow error */ | |
2593 | assert(ua_sess); | |
2594 | ||
2595 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2596 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2597 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2598 | if (ua_chan_node == NULL) { |
2599 | /* Channel does not exist, skip disabling */ | |
2600 | goto error; | |
2601 | } | |
2602 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2603 | ||
bec39940 DG |
2604 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2605 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2606 | if (ua_event_node == NULL) { |
2607 | /* Event does not exist, skip disabling */ | |
2608 | goto error; | |
2609 | } | |
2610 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2611 | ||
2612 | ret = disable_ust_app_event(ua_sess, ua_event, app); | |
2613 | if (ret < 0) { | |
2614 | goto error; | |
2615 | } | |
2616 | ||
2617 | error: | |
2618 | rcu_read_unlock(); | |
2619 | return ret; | |
2620 | } | |
e0c7ec2b DG |
2621 | |
2622 | /* | |
2623 | * Validate version of UST apps and set the compatible bit. | |
2624 | */ | |
2625 | int ust_app_validate_version(int sock) | |
2626 | { | |
2627 | int ret; | |
2628 | struct ust_app *app; | |
2629 | ||
2630 | rcu_read_lock(); | |
2631 | ||
2632 | app = find_app_by_sock(sock); | |
2633 | assert(app); | |
2634 | ||
2635 | ret = ustctl_tracer_version(sock, &app->version); | |
2636 | if (ret < 0) { | |
2637 | goto error; | |
2638 | } | |
2639 | ||
2640 | /* Validate version */ | |
2641 | if (app->version.major > UST_APP_MAJOR_VERSION) { | |
2642 | goto error; | |
2643 | } | |
2644 | ||
2645 | DBG2("UST app PID %d is compatible with major version %d " | |
852d0037 | 2646 | "(supporting <= %d)", app->pid, app->version.major, |
e0c7ec2b DG |
2647 | UST_APP_MAJOR_VERSION); |
2648 | app->compatible = 1; | |
2649 | rcu_read_unlock(); | |
2650 | return 0; | |
2651 | ||
2652 | error: | |
2653 | DBG2("UST app PID %d is not compatible with major version %d " | |
852d0037 | 2654 | "(supporting <= %d)", app->pid, app->version.major, |
e0c7ec2b DG |
2655 | UST_APP_MAJOR_VERSION); |
2656 | app->compatible = 0; | |
2657 | rcu_read_unlock(); | |
2658 | return -1; | |
2659 | } | |
4466912f DG |
2660 | |
2661 | /* | |
2662 | * Calibrate registered applications. | |
2663 | */ | |
2664 | int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate) | |
2665 | { | |
2666 | int ret = 0; | |
2667 | struct lttng_ht_iter iter; | |
2668 | struct ust_app *app; | |
2669 | ||
2670 | rcu_read_lock(); | |
2671 | ||
852d0037 | 2672 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
4466912f DG |
2673 | if (!app->compatible) { |
2674 | /* | |
2675 | * TODO: In time, we should notice the caller of this error by | |
2676 | * telling him that this is a version error. | |
2677 | */ | |
2678 | continue; | |
2679 | } | |
2680 | ||
852d0037 | 2681 | ret = ustctl_calibrate(app->sock, calibrate); |
4466912f DG |
2682 | if (ret < 0) { |
2683 | switch (ret) { | |
2684 | case -ENOSYS: | |
2685 | /* Means that it's not implemented on the tracer side. */ | |
2686 | ret = 0; | |
2687 | break; | |
2688 | default: | |
2689 | /* TODO: Report error to user */ | |
2690 | DBG2("Calibrate app PID %d returned with error %d", | |
852d0037 | 2691 | app->pid, ret); |
4466912f DG |
2692 | break; |
2693 | } | |
2694 | } | |
2695 | } | |
2696 | ||
2697 | DBG("UST app global domain calibration finished"); | |
2698 | ||
2699 | rcu_read_unlock(); | |
2700 | ||
2701 | return ret; | |
2702 | } |