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> |
fb54cdbf | 28 | #include <lttng/ust-error.h> |
bec39940 | 29 | |
990570ed | 30 | #include <common/common.h> |
86acf0da | 31 | #include <common/sessiond-comm/sessiond-comm.h> |
1e307fab | 32 | |
86acf0da DG |
33 | #include "fd-limit.h" |
34 | #include "health.h" | |
56fff090 | 35 | #include "ust-app.h" |
48842b30 | 36 | #include "ust-consumer.h" |
d80a6244 DG |
37 | #include "ust-ctl.h" |
38 | ||
55cc08a6 DG |
39 | /* |
40 | * Delete ust context safely. RCU read lock must be held before calling | |
41 | * this function. | |
42 | */ | |
43 | static | |
44 | void delete_ust_app_ctx(int sock, struct ust_app_ctx *ua_ctx) | |
45 | { | |
46 | if (ua_ctx->obj) { | |
47 | ustctl_release_object(sock, ua_ctx->obj); | |
48 | free(ua_ctx->obj); | |
49 | } | |
50 | free(ua_ctx); | |
51 | } | |
52 | ||
d80a6244 DG |
53 | /* |
54 | * Delete ust app event safely. RCU read lock must be held before calling | |
55 | * this function. | |
56 | */ | |
8b366481 DG |
57 | static |
58 | void delete_ust_app_event(int sock, struct ust_app_event *ua_event) | |
d80a6244 | 59 | { |
55cc08a6 | 60 | int ret; |
bec39940 | 61 | struct lttng_ht_iter iter; |
55cc08a6 DG |
62 | struct ust_app_ctx *ua_ctx; |
63 | ||
fc34caaa | 64 | /* Destroy each context of event */ |
bec39940 DG |
65 | cds_lfht_for_each_entry(ua_event->ctx->ht, &iter.iter, ua_ctx, |
66 | node.node) { | |
67 | ret = lttng_ht_del(ua_event->ctx, &iter); | |
55cc08a6 DG |
68 | assert(!ret); |
69 | delete_ust_app_ctx(sock, ua_ctx); | |
70 | } | |
53a80697 | 71 | free(ua_event->filter); |
bec39940 | 72 | lttng_ht_destroy(ua_event->ctx); |
d80a6244 | 73 | |
edb67388 DG |
74 | if (ua_event->obj != NULL) { |
75 | ustctl_release_object(sock, ua_event->obj); | |
76 | free(ua_event->obj); | |
77 | } | |
d80a6244 DG |
78 | free(ua_event); |
79 | } | |
80 | ||
81 | /* | |
82 | * Delete ust app stream safely. RCU read lock must be held before calling | |
83 | * this function. | |
84 | */ | |
8b366481 DG |
85 | static |
86 | void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream) | |
d80a6244 | 87 | { |
8b366481 DG |
88 | if (stream->obj) { |
89 | ustctl_release_object(sock, stream->obj); | |
4063050c | 90 | lttng_fd_put(LTTNG_FD_APPS, 2); |
8b366481 DG |
91 | free(stream->obj); |
92 | } | |
84cd17c6 | 93 | free(stream); |
d80a6244 DG |
94 | } |
95 | ||
96 | /* | |
97 | * Delete ust app channel safely. RCU read lock must be held before calling | |
98 | * this function. | |
99 | */ | |
8b366481 DG |
100 | static |
101 | void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan) | |
d80a6244 DG |
102 | { |
103 | int ret; | |
bec39940 | 104 | struct lttng_ht_iter iter; |
d80a6244 | 105 | struct ust_app_event *ua_event; |
55cc08a6 | 106 | struct ust_app_ctx *ua_ctx; |
d80a6244 DG |
107 | struct ltt_ust_stream *stream, *stmp; |
108 | ||
55cc08a6 | 109 | /* Wipe stream */ |
d80a6244 | 110 | cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) { |
84cd17c6 | 111 | cds_list_del(&stream->list); |
d80a6244 DG |
112 | delete_ust_app_stream(sock, stream); |
113 | } | |
114 | ||
55cc08a6 | 115 | /* Wipe context */ |
bec39940 DG |
116 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter.iter, ua_ctx, node.node) { |
117 | ret = lttng_ht_del(ua_chan->ctx, &iter); | |
55cc08a6 DG |
118 | assert(!ret); |
119 | delete_ust_app_ctx(sock, ua_ctx); | |
120 | } | |
bec39940 | 121 | lttng_ht_destroy(ua_chan->ctx); |
d80a6244 | 122 | |
55cc08a6 | 123 | /* Wipe events */ |
bec39940 DG |
124 | cds_lfht_for_each_entry(ua_chan->events->ht, &iter.iter, ua_event, |
125 | node.node) { | |
126 | ret = lttng_ht_del(ua_chan->events, &iter); | |
525b0740 | 127 | assert(!ret); |
d80a6244 DG |
128 | delete_ust_app_event(sock, ua_event); |
129 | } | |
bec39940 | 130 | lttng_ht_destroy(ua_chan->events); |
edb67388 DG |
131 | |
132 | if (ua_chan->obj != NULL) { | |
133 | ustctl_release_object(sock, ua_chan->obj); | |
4063050c | 134 | lttng_fd_put(LTTNG_FD_APPS, 2); |
edb67388 DG |
135 | free(ua_chan->obj); |
136 | } | |
84cd17c6 | 137 | free(ua_chan); |
d80a6244 DG |
138 | } |
139 | ||
140 | /* | |
141 | * Delete ust app session safely. RCU read lock must be held before calling | |
142 | * this function. | |
143 | */ | |
8b366481 DG |
144 | static |
145 | void delete_ust_app_session(int sock, struct ust_app_session *ua_sess) | |
d80a6244 DG |
146 | { |
147 | int ret; | |
bec39940 | 148 | struct lttng_ht_iter iter; |
d80a6244 DG |
149 | struct ust_app_channel *ua_chan; |
150 | ||
151 | if (ua_sess->metadata) { | |
8b366481 DG |
152 | if (ua_sess->metadata->stream_obj) { |
153 | ustctl_release_object(sock, ua_sess->metadata->stream_obj); | |
4063050c | 154 | lttng_fd_put(LTTNG_FD_APPS, 2); |
8b366481 DG |
155 | free(ua_sess->metadata->stream_obj); |
156 | } | |
157 | if (ua_sess->metadata->obj) { | |
158 | ustctl_release_object(sock, ua_sess->metadata->obj); | |
4063050c | 159 | lttng_fd_put(LTTNG_FD_APPS, 2); |
8b366481 DG |
160 | free(ua_sess->metadata->obj); |
161 | } | |
a2c0da86 | 162 | trace_ust_destroy_metadata(ua_sess->metadata); |
d80a6244 DG |
163 | } |
164 | ||
bec39940 DG |
165 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
166 | node.node) { | |
167 | ret = lttng_ht_del(ua_sess->channels, &iter); | |
525b0740 | 168 | assert(!ret); |
d80a6244 DG |
169 | delete_ust_app_channel(sock, ua_chan); |
170 | } | |
bec39940 | 171 | lttng_ht_destroy(ua_sess->channels); |
d80a6244 | 172 | |
aee6bafd MD |
173 | if (ua_sess->handle != -1) { |
174 | ustctl_release_handle(sock, ua_sess->handle); | |
175 | } | |
8b366481 | 176 | free(ua_sess); |
d80a6244 | 177 | } |
91d76f53 DG |
178 | |
179 | /* | |
284d8f55 DG |
180 | * Delete a traceable application structure from the global list. Never call |
181 | * this function outside of a call_rcu call. | |
91d76f53 | 182 | */ |
8b366481 DG |
183 | static |
184 | void delete_ust_app(struct ust_app *app) | |
91d76f53 | 185 | { |
8b366481 | 186 | int ret, sock; |
bec39940 | 187 | struct lttng_ht_iter iter; |
284d8f55 | 188 | struct ust_app_session *ua_sess; |
44d3bd01 | 189 | |
f6a9efaa | 190 | rcu_read_lock(); |
44d3bd01 | 191 | |
d80a6244 | 192 | /* Delete ust app sessions info */ |
852d0037 DG |
193 | sock = app->sock; |
194 | app->sock = -1; | |
d80a6244 | 195 | |
8b366481 | 196 | /* Wipe sessions */ |
bec39940 DG |
197 | cds_lfht_for_each_entry(app->sessions->ht, &iter.iter, ua_sess, |
198 | node.node) { | |
199 | ret = lttng_ht_del(app->sessions, &iter); | |
525b0740 | 200 | assert(!ret); |
852d0037 | 201 | delete_ust_app_session(app->sock, ua_sess); |
d80a6244 | 202 | } |
bec39940 | 203 | lttng_ht_destroy(app->sessions); |
d80a6244 | 204 | |
6414a713 | 205 | /* |
852d0037 DG |
206 | * Wait until we have deleted the application from the sock hash table |
207 | * before closing this socket, otherwise an application could re-use the | |
208 | * socket ID and race with the teardown, using the same hash table entry. | |
209 | * | |
210 | * It's OK to leave the close in call_rcu. We want it to stay unique for | |
211 | * all RCU readers that could run concurrently with unregister app, | |
212 | * therefore we _need_ to only close that socket after a grace period. So | |
213 | * it should stay in this RCU callback. | |
214 | * | |
215 | * This close() is a very important step of the synchronization model so | |
216 | * every modification to this function must be carefully reviewed. | |
6414a713 | 217 | */ |
799e2c4f MD |
218 | ret = close(sock); |
219 | if (ret) { | |
220 | PERROR("close"); | |
221 | } | |
4063050c | 222 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d80a6244 | 223 | |
852d0037 | 224 | DBG2("UST app pid %d deleted", app->pid); |
284d8f55 | 225 | free(app); |
bec39940 | 226 | |
f6a9efaa | 227 | rcu_read_unlock(); |
099e26bd DG |
228 | } |
229 | ||
230 | /* | |
f6a9efaa | 231 | * URCU intermediate call to delete an UST app. |
099e26bd | 232 | */ |
8b366481 DG |
233 | static |
234 | void delete_ust_app_rcu(struct rcu_head *head) | |
099e26bd | 235 | { |
bec39940 DG |
236 | struct lttng_ht_node_ulong *node = |
237 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa | 238 | struct ust_app *app = |
852d0037 | 239 | caa_container_of(node, struct ust_app, pid_n); |
f6a9efaa | 240 | |
852d0037 | 241 | DBG3("Call RCU deleting app PID %d", app->pid); |
f6a9efaa | 242 | delete_ust_app(app); |
099e26bd DG |
243 | } |
244 | ||
8b366481 DG |
245 | /* |
246 | * Alloc new UST app session. | |
247 | */ | |
248 | static | |
249 | struct ust_app_session *alloc_ust_app_session(void) | |
250 | { | |
251 | struct ust_app_session *ua_sess; | |
252 | ||
253 | /* Init most of the default value by allocating and zeroing */ | |
254 | ua_sess = zmalloc(sizeof(struct ust_app_session)); | |
255 | if (ua_sess == NULL) { | |
256 | PERROR("malloc"); | |
257 | goto error; | |
258 | } | |
259 | ||
260 | ua_sess->handle = -1; | |
bec39940 | 261 | ua_sess->channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
8b366481 DG |
262 | |
263 | return ua_sess; | |
264 | ||
265 | error: | |
266 | return NULL; | |
267 | } | |
268 | ||
269 | /* | |
270 | * Alloc new UST app channel. | |
271 | */ | |
272 | static | |
273 | struct ust_app_channel *alloc_ust_app_channel(char *name, | |
274 | struct lttng_ust_channel *attr) | |
275 | { | |
276 | struct ust_app_channel *ua_chan; | |
277 | ||
278 | /* Init most of the default value by allocating and zeroing */ | |
279 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); | |
280 | if (ua_chan == NULL) { | |
281 | PERROR("malloc"); | |
282 | goto error; | |
283 | } | |
284 | ||
285 | /* Setup channel name */ | |
286 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
287 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
288 | ||
289 | ua_chan->enabled = 1; | |
290 | ua_chan->handle = -1; | |
bec39940 DG |
291 | ua_chan->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
292 | ua_chan->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); | |
293 | lttng_ht_node_init_str(&ua_chan->node, ua_chan->name); | |
8b366481 DG |
294 | |
295 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); | |
296 | ||
297 | /* Copy attributes */ | |
298 | if (attr) { | |
299 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
300 | } | |
301 | ||
302 | DBG3("UST app channel %s allocated", ua_chan->name); | |
303 | ||
304 | return ua_chan; | |
305 | ||
306 | error: | |
307 | return NULL; | |
308 | } | |
309 | ||
310 | /* | |
311 | * Alloc new UST app event. | |
312 | */ | |
313 | static | |
314 | struct ust_app_event *alloc_ust_app_event(char *name, | |
315 | struct lttng_ust_event *attr) | |
316 | { | |
317 | struct ust_app_event *ua_event; | |
318 | ||
319 | /* Init most of the default value by allocating and zeroing */ | |
320 | ua_event = zmalloc(sizeof(struct ust_app_event)); | |
321 | if (ua_event == NULL) { | |
322 | PERROR("malloc"); | |
323 | goto error; | |
324 | } | |
325 | ||
326 | ua_event->enabled = 1; | |
327 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
328 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
bec39940 DG |
329 | ua_event->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
330 | lttng_ht_node_init_str(&ua_event->node, ua_event->name); | |
8b366481 DG |
331 | |
332 | /* Copy attributes */ | |
333 | if (attr) { | |
334 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
335 | } | |
336 | ||
337 | DBG3("UST app event %s allocated", ua_event->name); | |
338 | ||
339 | return ua_event; | |
340 | ||
341 | error: | |
342 | return NULL; | |
343 | } | |
344 | ||
345 | /* | |
346 | * Alloc new UST app context. | |
347 | */ | |
348 | static | |
349 | struct ust_app_ctx *alloc_ust_app_ctx(struct lttng_ust_context *uctx) | |
350 | { | |
351 | struct ust_app_ctx *ua_ctx; | |
352 | ||
353 | ua_ctx = zmalloc(sizeof(struct ust_app_ctx)); | |
354 | if (ua_ctx == NULL) { | |
355 | goto error; | |
356 | } | |
357 | ||
358 | if (uctx) { | |
359 | memcpy(&ua_ctx->ctx, uctx, sizeof(ua_ctx->ctx)); | |
360 | } | |
361 | ||
362 | DBG3("UST app context %d allocated", ua_ctx->ctx.ctx); | |
363 | ||
364 | error: | |
365 | return ua_ctx; | |
366 | } | |
367 | ||
099e26bd | 368 | /* |
421cb601 DG |
369 | * Find an ust_app using the sock and return it. RCU read side lock must be |
370 | * held before calling this helper function. | |
099e26bd | 371 | */ |
8b366481 DG |
372 | static |
373 | struct ust_app *find_app_by_sock(int sock) | |
099e26bd | 374 | { |
bec39940 | 375 | struct lttng_ht_node_ulong *node; |
bec39940 | 376 | struct lttng_ht_iter iter; |
f6a9efaa | 377 | |
852d0037 | 378 | lttng_ht_lookup(ust_app_ht_by_sock, (void *)((unsigned long) sock), &iter); |
bec39940 | 379 | node = lttng_ht_iter_get_node_ulong(&iter); |
f6a9efaa DG |
380 | if (node == NULL) { |
381 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
382 | goto error; |
383 | } | |
852d0037 DG |
384 | |
385 | return caa_container_of(node, struct ust_app, sock_n); | |
f6a9efaa DG |
386 | |
387 | error: | |
388 | return NULL; | |
099e26bd DG |
389 | } |
390 | ||
55cc08a6 DG |
391 | /* |
392 | * Create the channel context on the tracer. | |
393 | */ | |
394 | static | |
395 | int create_ust_channel_context(struct ust_app_channel *ua_chan, | |
396 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
397 | { | |
398 | int ret; | |
399 | ||
86acf0da DG |
400 | health_code_update(&health_thread_cmd); |
401 | ||
852d0037 | 402 | ret = ustctl_add_context(app->sock, &ua_ctx->ctx, |
55cc08a6 DG |
403 | ua_chan->obj, &ua_ctx->obj); |
404 | if (ret < 0) { | |
405 | goto error; | |
406 | } | |
407 | ||
408 | ua_ctx->handle = ua_ctx->obj->handle; | |
409 | ||
727d5404 | 410 | DBG2("UST app context created successfully for channel %s", ua_chan->name); |
55cc08a6 DG |
411 | |
412 | error: | |
86acf0da | 413 | health_code_update(&health_thread_cmd); |
55cc08a6 DG |
414 | return ret; |
415 | } | |
416 | ||
417 | /* | |
418 | * Create the event context on the tracer. | |
419 | */ | |
420 | static | |
421 | int create_ust_event_context(struct ust_app_event *ua_event, | |
422 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
423 | { | |
424 | int ret; | |
425 | ||
86acf0da DG |
426 | health_code_update(&health_thread_cmd); |
427 | ||
852d0037 | 428 | ret = ustctl_add_context(app->sock, &ua_ctx->ctx, |
55cc08a6 DG |
429 | ua_event->obj, &ua_ctx->obj); |
430 | if (ret < 0) { | |
431 | goto error; | |
432 | } | |
433 | ||
434 | ua_ctx->handle = ua_ctx->obj->handle; | |
435 | ||
727d5404 | 436 | DBG2("UST app context created successfully for event %s", ua_event->name); |
55cc08a6 DG |
437 | |
438 | error: | |
86acf0da | 439 | health_code_update(&health_thread_cmd); |
55cc08a6 DG |
440 | return ret; |
441 | } | |
442 | ||
53a80697 MD |
443 | /* |
444 | * Set the filter on the tracer. | |
445 | */ | |
446 | static | |
447 | int set_ust_event_filter(struct ust_app_event *ua_event, | |
448 | struct ust_app *app) | |
449 | { | |
450 | int ret; | |
451 | ||
86acf0da DG |
452 | health_code_update(&health_thread_cmd); |
453 | ||
53a80697 | 454 | if (!ua_event->filter) { |
86acf0da DG |
455 | ret = 0; |
456 | goto error; | |
53a80697 MD |
457 | } |
458 | ||
459 | ret = ustctl_set_filter(app->sock, ua_event->filter, | |
460 | ua_event->obj); | |
461 | if (ret < 0) { | |
462 | goto error; | |
463 | } | |
464 | ||
465 | DBG2("UST filter set successfully for event %s", ua_event->name); | |
466 | ||
467 | error: | |
86acf0da | 468 | health_code_update(&health_thread_cmd); |
53a80697 MD |
469 | return ret; |
470 | } | |
471 | ||
9730260e DG |
472 | /* |
473 | * Disable the specified event on to UST tracer for the UST session. | |
474 | */ | |
475 | static int disable_ust_event(struct ust_app *app, | |
476 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
477 | { | |
478 | int ret; | |
479 | ||
86acf0da DG |
480 | health_code_update(&health_thread_cmd); |
481 | ||
852d0037 | 482 | ret = ustctl_disable(app->sock, ua_event->obj); |
9730260e DG |
483 | if (ret < 0) { |
484 | ERR("UST app event %s disable failed for app (pid: %d) " | |
485 | "and session handle %d with ret %d", | |
852d0037 | 486 | ua_event->attr.name, app->pid, ua_sess->handle, ret); |
9730260e DG |
487 | goto error; |
488 | } | |
489 | ||
490 | DBG2("UST app event %s disabled successfully for app (pid: %d)", | |
852d0037 | 491 | ua_event->attr.name, app->pid); |
9730260e DG |
492 | |
493 | error: | |
86acf0da | 494 | health_code_update(&health_thread_cmd); |
9730260e DG |
495 | return ret; |
496 | } | |
497 | ||
78f0bacd DG |
498 | /* |
499 | * Disable the specified channel on to UST tracer for the UST session. | |
500 | */ | |
501 | static int disable_ust_channel(struct ust_app *app, | |
502 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
503 | { | |
504 | int ret; | |
505 | ||
86acf0da DG |
506 | health_code_update(&health_thread_cmd); |
507 | ||
852d0037 | 508 | ret = ustctl_disable(app->sock, ua_chan->obj); |
78f0bacd DG |
509 | if (ret < 0) { |
510 | ERR("UST app channel %s disable failed for app (pid: %d) " | |
511 | "and session handle %d with ret %d", | |
852d0037 | 512 | ua_chan->name, app->pid, ua_sess->handle, ret); |
78f0bacd DG |
513 | goto error; |
514 | } | |
515 | ||
78f0bacd | 516 | DBG2("UST app channel %s disabled successfully for app (pid: %d)", |
852d0037 | 517 | ua_chan->name, app->pid); |
78f0bacd DG |
518 | |
519 | error: | |
86acf0da | 520 | health_code_update(&health_thread_cmd); |
78f0bacd DG |
521 | return ret; |
522 | } | |
523 | ||
524 | /* | |
525 | * Enable the specified channel on to UST tracer for the UST session. | |
526 | */ | |
527 | static int enable_ust_channel(struct ust_app *app, | |
528 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
529 | { | |
530 | int ret; | |
531 | ||
86acf0da DG |
532 | health_code_update(&health_thread_cmd); |
533 | ||
852d0037 | 534 | ret = ustctl_enable(app->sock, ua_chan->obj); |
78f0bacd DG |
535 | if (ret < 0) { |
536 | ERR("UST app channel %s enable failed for app (pid: %d) " | |
537 | "and session handle %d with ret %d", | |
852d0037 | 538 | ua_chan->name, app->pid, ua_sess->handle, ret); |
78f0bacd DG |
539 | goto error; |
540 | } | |
541 | ||
542 | ua_chan->enabled = 1; | |
543 | ||
544 | DBG2("UST app channel %s enabled successfully for app (pid: %d)", | |
852d0037 | 545 | ua_chan->name, app->pid); |
78f0bacd DG |
546 | |
547 | error: | |
86acf0da | 548 | health_code_update(&health_thread_cmd); |
78f0bacd DG |
549 | return ret; |
550 | } | |
551 | ||
edb67388 DG |
552 | /* |
553 | * Enable the specified event on to UST tracer for the UST session. | |
554 | */ | |
555 | static int enable_ust_event(struct ust_app *app, | |
556 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
557 | { | |
558 | int ret; | |
559 | ||
86acf0da DG |
560 | health_code_update(&health_thread_cmd); |
561 | ||
852d0037 | 562 | ret = ustctl_enable(app->sock, ua_event->obj); |
edb67388 DG |
563 | if (ret < 0) { |
564 | ERR("UST app event %s enable failed for app (pid: %d) " | |
565 | "and session handle %d with ret %d", | |
852d0037 | 566 | ua_event->attr.name, app->pid, ua_sess->handle, ret); |
edb67388 DG |
567 | goto error; |
568 | } | |
569 | ||
570 | DBG2("UST app event %s enabled successfully for app (pid: %d)", | |
852d0037 | 571 | ua_event->attr.name, app->pid); |
edb67388 DG |
572 | |
573 | error: | |
86acf0da | 574 | health_code_update(&health_thread_cmd); |
edb67388 DG |
575 | return ret; |
576 | } | |
577 | ||
099e26bd | 578 | /* |
5b4a0ec0 | 579 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 580 | */ |
5b4a0ec0 DG |
581 | static int open_ust_metadata(struct ust_app *app, |
582 | struct ust_app_session *ua_sess) | |
0177d773 | 583 | { |
5b4a0ec0 DG |
584 | int ret; |
585 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 586 | |
86acf0da DG |
587 | health_code_update(&health_thread_cmd); |
588 | ||
5b4a0ec0 DG |
589 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
590 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
591 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
592 | uattr.switch_timer_interval = | |
593 | ua_sess->metadata->attr.switch_timer_interval; | |
594 | uattr.read_timer_interval = | |
595 | ua_sess->metadata->attr.read_timer_interval; | |
596 | uattr.output = ua_sess->metadata->attr.output; | |
597 | ||
4063050c MD |
598 | /* We are going to receive 2 fds, we need to reserve them. */ |
599 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
600 | if (ret < 0) { | |
601 | ERR("Exhausted number of available FD upon metadata open"); | |
602 | goto error; | |
603 | } | |
5b4a0ec0 | 604 | /* UST tracer metadata creation */ |
852d0037 | 605 | ret = ustctl_open_metadata(app->sock, ua_sess->handle, &uattr, |
5b4a0ec0 DG |
606 | &ua_sess->metadata->obj); |
607 | if (ret < 0) { | |
fc34caaa | 608 | ERR("UST app open metadata failed for app pid:%d with ret %d", |
852d0037 | 609 | app->pid, ret); |
f6a9efaa | 610 | goto error; |
0177d773 | 611 | } |
f6a9efaa | 612 | |
6d3686da DG |
613 | ua_sess->metadata->handle = ua_sess->metadata->obj->handle; |
614 | ||
f6a9efaa | 615 | error: |
86acf0da | 616 | health_code_update(&health_thread_cmd); |
5b4a0ec0 | 617 | return ret; |
91d76f53 DG |
618 | } |
619 | ||
620 | /* | |
5b4a0ec0 | 621 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 622 | */ |
5b4a0ec0 DG |
623 | static int create_ust_stream(struct ust_app *app, |
624 | struct ust_app_session *ua_sess) | |
91d76f53 | 625 | { |
5b4a0ec0 | 626 | int ret; |
421cb601 | 627 | |
86acf0da DG |
628 | health_code_update(&health_thread_cmd); |
629 | ||
4063050c MD |
630 | /* We are going to receive 2 fds, we need to reserve them. */ |
631 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
632 | if (ret < 0) { | |
633 | ERR("Exhausted number of available FD upon metadata stream create"); | |
634 | goto error; | |
635 | } | |
852d0037 | 636 | ret = ustctl_create_stream(app->sock, ua_sess->metadata->obj, |
5b4a0ec0 DG |
637 | &ua_sess->metadata->stream_obj); |
638 | if (ret < 0) { | |
639 | ERR("UST create metadata stream failed"); | |
421cb601 | 640 | goto error; |
91d76f53 | 641 | } |
421cb601 | 642 | |
421cb601 | 643 | error: |
86acf0da | 644 | health_code_update(&health_thread_cmd); |
5b4a0ec0 | 645 | return ret; |
91d76f53 DG |
646 | } |
647 | ||
b551a063 | 648 | /* |
5b4a0ec0 | 649 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 650 | */ |
5b4a0ec0 DG |
651 | static int create_ust_channel(struct ust_app *app, |
652 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 653 | { |
5b4a0ec0 | 654 | int ret; |
b551a063 | 655 | |
86acf0da DG |
656 | health_code_update(&health_thread_cmd); |
657 | ||
5b4a0ec0 | 658 | /* TODO: remove cast and use lttng-ust-abi.h */ |
4063050c MD |
659 | |
660 | /* We are going to receive 2 fds, we need to reserve them. */ | |
661 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
662 | if (ret < 0) { | |
663 | ERR("Exhausted number of available FD upon create channel"); | |
664 | goto error; | |
665 | } | |
86acf0da DG |
666 | |
667 | health_code_update(&health_thread_cmd); | |
668 | ||
852d0037 | 669 | ret = ustctl_create_channel(app->sock, ua_sess->handle, |
5b4a0ec0 DG |
670 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); |
671 | if (ret < 0) { | |
58f3ca76 | 672 | ERR("Creating channel %s for app (pid: %d, sock: %d) " |
5b4a0ec0 | 673 | "and session handle %d with ret %d", |
852d0037 | 674 | ua_chan->name, app->pid, app->sock, |
5b4a0ec0 | 675 | ua_sess->handle, ret); |
4063050c | 676 | lttng_fd_put(LTTNG_FD_APPS, 2); |
b551a063 DG |
677 | goto error; |
678 | } | |
679 | ||
5b4a0ec0 | 680 | ua_chan->handle = ua_chan->obj->handle; |
b551a063 | 681 | |
5b4a0ec0 | 682 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
852d0037 | 683 | ua_chan->name, app->pid, app->sock); |
b551a063 | 684 | |
86acf0da DG |
685 | health_code_update(&health_thread_cmd); |
686 | ||
8535a6d9 DG |
687 | /* If channel is not enabled, disable it on the tracer */ |
688 | if (!ua_chan->enabled) { | |
689 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
690 | if (ret < 0) { | |
691 | goto error; | |
692 | } | |
693 | } | |
694 | ||
b551a063 | 695 | error: |
86acf0da | 696 | health_code_update(&health_thread_cmd); |
b551a063 DG |
697 | return ret; |
698 | } | |
699 | ||
91d76f53 | 700 | /* |
5b4a0ec0 | 701 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 702 | */ |
edb67388 DG |
703 | static |
704 | int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess, | |
705 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event) | |
91d76f53 | 706 | { |
5b4a0ec0 | 707 | int ret = 0; |
284d8f55 | 708 | |
86acf0da DG |
709 | health_code_update(&health_thread_cmd); |
710 | ||
5b4a0ec0 | 711 | /* Create UST event on tracer */ |
852d0037 | 712 | ret = ustctl_create_event(app->sock, &ua_event->attr, ua_chan->obj, |
5b4a0ec0 DG |
713 | &ua_event->obj); |
714 | if (ret < 0) { | |
715 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
852d0037 | 716 | ua_event->attr.name, app->pid, ret); |
5b4a0ec0 | 717 | goto error; |
91d76f53 | 718 | } |
f6a9efaa | 719 | |
5b4a0ec0 | 720 | ua_event->handle = ua_event->obj->handle; |
284d8f55 | 721 | |
5b4a0ec0 | 722 | DBG2("UST app event %s created successfully for pid:%d", |
852d0037 | 723 | ua_event->attr.name, app->pid); |
f6a9efaa | 724 | |
86acf0da DG |
725 | health_code_update(&health_thread_cmd); |
726 | ||
8535a6d9 | 727 | /* If event not enabled, disable it on the tracer */ |
fc34caaa | 728 | if (ua_event->enabled == 0) { |
8535a6d9 DG |
729 | ret = disable_ust_event(app, ua_sess, ua_event); |
730 | if (ret < 0) { | |
fc34caaa DG |
731 | /* |
732 | * If we hit an EPERM, something is wrong with our disable call. If | |
733 | * we get an EEXIST, there is a problem on the tracer side since we | |
734 | * just created it. | |
735 | */ | |
736 | switch (ret) { | |
49c336c1 | 737 | case -LTTNG_UST_ERR_PERM: |
fc34caaa DG |
738 | /* Code flow problem */ |
739 | assert(0); | |
49c336c1 | 740 | case -LTTNG_UST_ERR_EXIST: |
fc34caaa DG |
741 | /* It's OK for our use case. */ |
742 | ret = 0; | |
743 | break; | |
744 | default: | |
745 | break; | |
746 | } | |
8535a6d9 DG |
747 | goto error; |
748 | } | |
749 | } | |
750 | ||
5b4a0ec0 | 751 | error: |
86acf0da | 752 | health_code_update(&health_thread_cmd); |
5b4a0ec0 | 753 | return ret; |
91d76f53 | 754 | } |
48842b30 | 755 | |
5b4a0ec0 DG |
756 | /* |
757 | * Copy data between an UST app event and a LTT event. | |
758 | */ | |
421cb601 | 759 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
760 | struct ltt_ust_event *uevent) |
761 | { | |
bec39940 | 762 | struct lttng_ht_iter iter; |
55cc08a6 DG |
763 | struct ltt_ust_context *uctx; |
764 | struct ust_app_ctx *ua_ctx; | |
765 | ||
48842b30 DG |
766 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); |
767 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
768 | ||
fc34caaa DG |
769 | ua_event->enabled = uevent->enabled; |
770 | ||
5b4a0ec0 DG |
771 | /* Copy event attributes */ |
772 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
773 | ||
53a80697 MD |
774 | /* Copy filter bytecode */ |
775 | if (uevent->filter) { | |
776 | ua_event->filter = zmalloc(sizeof(*ua_event->filter) + | |
777 | uevent->filter->len); | |
778 | if (!ua_event->filter) { | |
779 | return; | |
780 | } | |
781 | memcpy(ua_event->filter, uevent->filter, | |
782 | sizeof(*ua_event->filter) + uevent->filter->len); | |
783 | } | |
bec39940 | 784 | cds_lfht_for_each_entry(uevent->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
785 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
786 | if (ua_ctx == NULL) { | |
fc34caaa DG |
787 | /* malloc() failed. We should simply stop */ |
788 | return; | |
55cc08a6 | 789 | } |
fc34caaa | 790 | |
bec39940 DG |
791 | lttng_ht_node_init_ulong(&ua_ctx->node, |
792 | (unsigned long) ua_ctx->ctx.ctx); | |
793 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 | 794 | } |
48842b30 DG |
795 | } |
796 | ||
5b4a0ec0 DG |
797 | /* |
798 | * Copy data between an UST app channel and a LTT channel. | |
799 | */ | |
421cb601 | 800 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
801 | struct ltt_ust_channel *uchan) |
802 | { | |
bec39940 DG |
803 | struct lttng_ht_iter iter; |
804 | struct lttng_ht_node_str *ua_event_node; | |
48842b30 | 805 | struct ltt_ust_event *uevent; |
55cc08a6 | 806 | struct ltt_ust_context *uctx; |
48842b30 | 807 | struct ust_app_event *ua_event; |
55cc08a6 | 808 | struct ust_app_ctx *ua_ctx; |
48842b30 | 809 | |
fc34caaa | 810 | DBG2("UST app shadow copy of channel %s started", ua_chan->name); |
48842b30 DG |
811 | |
812 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
813 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
814 | /* Copy event attributes */ |
815 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 | 816 | |
fc34caaa DG |
817 | ua_chan->enabled = uchan->enabled; |
818 | ||
bec39940 | 819 | cds_lfht_for_each_entry(uchan->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
820 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
821 | if (ua_ctx == NULL) { | |
822 | continue; | |
823 | } | |
bec39940 DG |
824 | lttng_ht_node_init_ulong(&ua_ctx->node, |
825 | (unsigned long) ua_ctx->ctx.ctx); | |
826 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 | 827 | } |
48842b30 | 828 | |
421cb601 | 829 | /* Copy all events from ltt ust channel to ust app channel */ |
bec39940 DG |
830 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
831 | struct lttng_ht_iter uiter; | |
ba767faf | 832 | |
bec39940 DG |
833 | lttng_ht_lookup(ua_chan->events, (void *) uevent->attr.name, &uiter); |
834 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
48842b30 | 835 | if (ua_event_node == NULL) { |
421cb601 | 836 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 837 | uevent->attr.name); |
284d8f55 | 838 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 839 | if (ua_event == NULL) { |
5b4a0ec0 | 840 | continue; |
48842b30 | 841 | } |
421cb601 | 842 | shadow_copy_event(ua_event, uevent); |
bec39940 | 843 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
48842b30 | 844 | } |
48842b30 DG |
845 | } |
846 | ||
fc34caaa | 847 | DBG3("UST app shadow copy of channel %s done", ua_chan->name); |
48842b30 DG |
848 | } |
849 | ||
5b4a0ec0 DG |
850 | /* |
851 | * Copy data between a UST app session and a regular LTT session. | |
852 | */ | |
421cb601 | 853 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
bec39940 | 854 | struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 | 855 | { |
bec39940 DG |
856 | struct lttng_ht_node_str *ua_chan_node; |
857 | struct lttng_ht_iter iter; | |
48842b30 DG |
858 | struct ltt_ust_channel *uchan; |
859 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
860 | time_t rawtime; |
861 | struct tm *timeinfo; | |
862 | char datetime[16]; | |
863 | int ret; | |
864 | ||
865 | /* Get date and time for unique app path */ | |
866 | time(&rawtime); | |
867 | timeinfo = localtime(&rawtime); | |
868 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 869 | |
421cb601 | 870 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 | 871 | |
a991f516 | 872 | ua_sess->id = usess->id; |
6df2e2c9 MD |
873 | ua_sess->uid = usess->uid; |
874 | ua_sess->gid = usess->gid; | |
48842b30 | 875 | |
00e2e675 DG |
876 | ret = snprintf(ua_sess->path, PATH_MAX, "%s-%d-%s/", app->name, app->pid, |
877 | datetime); | |
477d7741 MD |
878 | if (ret < 0) { |
879 | PERROR("asprintf UST shadow copy session"); | |
880 | /* TODO: We cannot return an error from here.. */ | |
881 | assert(0); | |
882 | } | |
883 | ||
48842b30 DG |
884 | /* TODO: support all UST domain */ |
885 | ||
886 | /* Iterate over all channels in global domain. */ | |
bec39940 DG |
887 | cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter, |
888 | uchan, node.node) { | |
889 | struct lttng_ht_iter uiter; | |
ba767faf | 890 | |
bec39940 DG |
891 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
892 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
5b4a0ec0 | 893 | if (ua_chan_node != NULL) { |
fc34caaa | 894 | /* Session exist. Contiuing. */ |
5b4a0ec0 DG |
895 | continue; |
896 | } | |
421cb601 | 897 | |
5b4a0ec0 DG |
898 | DBG2("Channel %s not found on shadow session copy, creating it", |
899 | uchan->name); | |
900 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
901 | if (ua_chan == NULL) { | |
fc34caaa | 902 | /* malloc failed FIXME: Might want to do handle ENOMEM .. */ |
5b4a0ec0 | 903 | continue; |
48842b30 DG |
904 | } |
905 | ||
5b4a0ec0 | 906 | shadow_copy_channel(ua_chan, uchan); |
bec39940 | 907 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
48842b30 DG |
908 | } |
909 | } | |
910 | ||
78f0bacd DG |
911 | /* |
912 | * Lookup sesison wrapper. | |
913 | */ | |
84cd17c6 MD |
914 | static |
915 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
bec39940 | 916 | struct ust_app *app, struct lttng_ht_iter *iter) |
84cd17c6 MD |
917 | { |
918 | /* Get right UST app session from app */ | |
2c348c10 | 919 | lttng_ht_lookup(app->sessions, (void *)((unsigned long) usess->id), iter); |
84cd17c6 MD |
920 | } |
921 | ||
421cb601 DG |
922 | /* |
923 | * Return ust app session from the app session hashtable using the UST session | |
a991f516 | 924 | * id. |
421cb601 | 925 | */ |
48842b30 DG |
926 | static struct ust_app_session *lookup_session_by_app( |
927 | struct ltt_ust_session *usess, struct ust_app *app) | |
928 | { | |
bec39940 DG |
929 | struct lttng_ht_iter iter; |
930 | struct lttng_ht_node_ulong *node; | |
48842b30 | 931 | |
84cd17c6 | 932 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 933 | node = lttng_ht_iter_get_node_ulong(&iter); |
48842b30 DG |
934 | if (node == NULL) { |
935 | goto error; | |
936 | } | |
937 | ||
938 | return caa_container_of(node, struct ust_app_session, node); | |
939 | ||
940 | error: | |
941 | return NULL; | |
942 | } | |
943 | ||
421cb601 DG |
944 | /* |
945 | * Create a UST session onto the tracer of app and add it the session | |
946 | * hashtable. | |
947 | * | |
948 | * Return ust app session or NULL on error. | |
949 | */ | |
950 | static struct ust_app_session *create_ust_app_session( | |
951 | struct ltt_ust_session *usess, struct ust_app *app) | |
952 | { | |
953 | int ret; | |
954 | struct ust_app_session *ua_sess; | |
955 | ||
86acf0da DG |
956 | health_code_update(&health_thread_cmd); |
957 | ||
421cb601 DG |
958 | ua_sess = lookup_session_by_app(usess, app); |
959 | if (ua_sess == NULL) { | |
a991f516 | 960 | DBG2("UST app pid: %d session id %d not found, creating it", |
852d0037 | 961 | app->pid, usess->id); |
421cb601 DG |
962 | ua_sess = alloc_ust_app_session(); |
963 | if (ua_sess == NULL) { | |
964 | /* Only malloc can failed so something is really wrong */ | |
fc34caaa | 965 | goto end; |
421cb601 | 966 | } |
477d7741 | 967 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
968 | } |
969 | ||
86acf0da DG |
970 | health_code_update(&health_thread_cmd); |
971 | ||
421cb601 | 972 | if (ua_sess->handle == -1) { |
852d0037 | 973 | ret = ustctl_create_session(app->sock); |
421cb601 | 974 | if (ret < 0) { |
852d0037 | 975 | ERR("Creating session for app pid %d", app->pid); |
0f83395d | 976 | delete_ust_app_session(-1, ua_sess); |
915d047c DG |
977 | /* This means that the tracer is gone... */ |
978 | ua_sess = (void*) -1UL; | |
0f83395d | 979 | goto end; |
421cb601 DG |
980 | } |
981 | ||
421cb601 DG |
982 | ua_sess->handle = ret; |
983 | ||
984 | /* Add ust app session to app's HT */ | |
2c348c10 | 985 | lttng_ht_node_init_ulong(&ua_sess->node, (unsigned long) ua_sess->id); |
bec39940 | 986 | lttng_ht_add_unique_ulong(app->sessions, &ua_sess->node); |
421cb601 DG |
987 | |
988 | DBG2("UST app session created successfully with handle %d", ret); | |
989 | } | |
990 | ||
fc34caaa | 991 | end: |
86acf0da | 992 | health_code_update(&health_thread_cmd); |
421cb601 | 993 | return ua_sess; |
421cb601 DG |
994 | } |
995 | ||
55cc08a6 DG |
996 | /* |
997 | * Create a context for the channel on the tracer. | |
998 | */ | |
999 | static | |
1000 | int create_ust_app_channel_context(struct ust_app_session *ua_sess, | |
1001 | struct ust_app_channel *ua_chan, struct lttng_ust_context *uctx, | |
1002 | struct ust_app *app) | |
1003 | { | |
1004 | int ret = 0; | |
bec39940 DG |
1005 | struct lttng_ht_iter iter; |
1006 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
1007 | struct ust_app_ctx *ua_ctx; |
1008 | ||
1009 | DBG2("UST app adding context to channel %s", ua_chan->name); | |
1010 | ||
bec39940 DG |
1011 | lttng_ht_lookup(ua_chan->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
1012 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
1013 | if (node != NULL) { |
1014 | ret = -EEXIST; | |
1015 | goto error; | |
1016 | } | |
1017 | ||
1018 | ua_ctx = alloc_ust_app_ctx(uctx); | |
1019 | if (ua_ctx == NULL) { | |
1020 | /* malloc failed */ | |
1021 | ret = -1; | |
1022 | goto error; | |
1023 | } | |
1024 | ||
bec39940 DG |
1025 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
1026 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 DG |
1027 | |
1028 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
1029 | if (ret < 0) { | |
1030 | goto error; | |
1031 | } | |
1032 | ||
1033 | error: | |
1034 | return ret; | |
1035 | } | |
1036 | ||
1037 | /* | |
1038 | * Create an UST context and enable it for the event on the tracer. | |
1039 | */ | |
1040 | static | |
1041 | int create_ust_app_event_context(struct ust_app_session *ua_sess, | |
1042 | struct ust_app_event *ua_event, struct lttng_ust_context *uctx, | |
1043 | struct ust_app *app) | |
1044 | { | |
1045 | int ret = 0; | |
bec39940 DG |
1046 | struct lttng_ht_iter iter; |
1047 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
1048 | struct ust_app_ctx *ua_ctx; |
1049 | ||
1050 | DBG2("UST app adding context to event %s", ua_event->name); | |
1051 | ||
bec39940 DG |
1052 | lttng_ht_lookup(ua_event->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
1053 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
1054 | if (node != NULL) { |
1055 | ret = -EEXIST; | |
1056 | goto error; | |
1057 | } | |
1058 | ||
1059 | ua_ctx = alloc_ust_app_ctx(uctx); | |
1060 | if (ua_ctx == NULL) { | |
1061 | /* malloc failed */ | |
1062 | ret = -1; | |
1063 | goto error; | |
1064 | } | |
1065 | ||
bec39940 DG |
1066 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
1067 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 DG |
1068 | |
1069 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
1070 | if (ret < 0) { | |
1071 | goto error; | |
1072 | } | |
1073 | ||
1074 | error: | |
1075 | return ret; | |
1076 | } | |
1077 | ||
53a80697 MD |
1078 | /* |
1079 | * Set UST filter for the event on the tracer. | |
1080 | */ | |
1081 | static | |
1082 | int set_ust_app_event_filter(struct ust_app_session *ua_sess, | |
1083 | struct ust_app_event *ua_event, | |
1084 | struct lttng_filter_bytecode *bytecode, | |
1085 | struct ust_app *app) | |
1086 | { | |
1087 | int ret = 0; | |
1088 | ||
1089 | DBG2("UST app adding context to event %s", ua_event->name); | |
1090 | ||
1091 | /* Copy filter bytecode */ | |
1092 | ua_event->filter = zmalloc(sizeof(*ua_event->filter) + bytecode->len); | |
1093 | if (!ua_event->filter) { | |
1094 | return -ENOMEM; | |
1095 | } | |
1096 | memcpy(ua_event->filter, bytecode, | |
1097 | sizeof(*ua_event->filter) + bytecode->len); | |
1098 | ret = set_ust_event_filter(ua_event, app); | |
1099 | if (ret < 0) { | |
1100 | goto error; | |
1101 | } | |
1102 | ||
1103 | error: | |
1104 | return ret; | |
1105 | } | |
1106 | ||
edb67388 DG |
1107 | /* |
1108 | * Enable on the tracer side a ust app event for the session and channel. | |
1109 | */ | |
1110 | static | |
1111 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 1112 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
1113 | { |
1114 | int ret; | |
1115 | ||
1116 | ret = enable_ust_event(app, ua_sess, ua_event); | |
1117 | if (ret < 0) { | |
1118 | goto error; | |
1119 | } | |
1120 | ||
1121 | ua_event->enabled = 1; | |
1122 | ||
1123 | error: | |
1124 | return ret; | |
1125 | } | |
1126 | ||
9730260e DG |
1127 | /* |
1128 | * Disable on the tracer side a ust app event for the session and channel. | |
1129 | */ | |
1130 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
7f79d3a1 | 1131 | struct ust_app_event *ua_event, struct ust_app *app) |
9730260e DG |
1132 | { |
1133 | int ret; | |
1134 | ||
1135 | ret = disable_ust_event(app, ua_sess, ua_event); | |
1136 | if (ret < 0) { | |
1137 | goto error; | |
1138 | } | |
1139 | ||
1140 | ua_event->enabled = 0; | |
1141 | ||
1142 | error: | |
1143 | return ret; | |
1144 | } | |
1145 | ||
78f0bacd DG |
1146 | /* |
1147 | * Lookup ust app channel for session and disable it on the tracer side. | |
1148 | */ | |
8535a6d9 DG |
1149 | static |
1150 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
1151 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 1152 | { |
8535a6d9 | 1153 | int ret; |
78f0bacd DG |
1154 | |
1155 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
1156 | if (ret < 0) { | |
1157 | goto error; | |
1158 | } | |
1159 | ||
8535a6d9 DG |
1160 | ua_chan->enabled = 0; |
1161 | ||
78f0bacd DG |
1162 | error: |
1163 | return ret; | |
1164 | } | |
1165 | ||
1166 | /* | |
1167 | * Lookup ust app channel for session and enable it on the tracer side. | |
1168 | */ | |
1169 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
1170 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
1171 | { | |
1172 | int ret = 0; | |
bec39940 DG |
1173 | struct lttng_ht_iter iter; |
1174 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1175 | struct ust_app_channel *ua_chan; |
1176 | ||
bec39940 DG |
1177 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1178 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
78f0bacd | 1179 | if (ua_chan_node == NULL) { |
a991f516 MD |
1180 | DBG2("Unable to find channel %s in ust session id %u", |
1181 | uchan->name, ua_sess->id); | |
78f0bacd DG |
1182 | goto error; |
1183 | } | |
1184 | ||
1185 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1186 | ||
1187 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
1188 | if (ret < 0) { | |
1189 | goto error; | |
1190 | } | |
1191 | ||
1192 | error: | |
1193 | return ret; | |
1194 | } | |
1195 | ||
284d8f55 | 1196 | /* |
5b4a0ec0 | 1197 | * Create UST app channel and create it on the tracer. |
284d8f55 | 1198 | */ |
5b4a0ec0 DG |
1199 | static struct ust_app_channel *create_ust_app_channel( |
1200 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
1201 | struct ust_app *app) | |
1202 | { | |
1203 | int ret = 0; | |
bec39940 DG |
1204 | struct lttng_ht_iter iter; |
1205 | struct lttng_ht_node_str *ua_chan_node; | |
5b4a0ec0 DG |
1206 | struct ust_app_channel *ua_chan; |
1207 | ||
1208 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1209 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1210 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
fc34caaa | 1211 | if (ua_chan_node != NULL) { |
5b4a0ec0 | 1212 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
fc34caaa | 1213 | goto end; |
5b4a0ec0 DG |
1214 | } |
1215 | ||
fc34caaa DG |
1216 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); |
1217 | if (ua_chan == NULL) { | |
1218 | /* Only malloc can fail here */ | |
1219 | goto error; | |
1220 | } | |
1221 | shadow_copy_channel(ua_chan, uchan); | |
1222 | ||
5b4a0ec0 DG |
1223 | ret = create_ust_channel(app, ua_sess, ua_chan); |
1224 | if (ret < 0) { | |
fc34caaa | 1225 | /* Not found previously means that it does not exist on the tracer */ |
49c336c1 | 1226 | assert(ret != -LTTNG_UST_ERR_EXIST); |
5b4a0ec0 DG |
1227 | goto error; |
1228 | } | |
1229 | ||
58f3ca76 DG |
1230 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
1231 | ||
fc34caaa | 1232 | DBG2("UST app create channel %s for PID %d completed", ua_chan->name, |
852d0037 | 1233 | app->pid); |
fc34caaa DG |
1234 | |
1235 | end: | |
5b4a0ec0 DG |
1236 | return ua_chan; |
1237 | ||
1238 | error: | |
fc34caaa | 1239 | delete_ust_app_channel(-1, ua_chan); |
5b4a0ec0 DG |
1240 | return NULL; |
1241 | } | |
1242 | ||
1243 | /* | |
1244 | * Create UST app event and create it on the tracer side. | |
1245 | */ | |
edb67388 DG |
1246 | static |
1247 | int create_ust_app_event(struct ust_app_session *ua_sess, | |
1248 | struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent, | |
1249 | struct ust_app *app) | |
284d8f55 | 1250 | { |
edb67388 | 1251 | int ret = 0; |
bec39940 DG |
1252 | struct lttng_ht_iter iter; |
1253 | struct lttng_ht_node_str *ua_event_node; | |
5b4a0ec0 | 1254 | struct ust_app_event *ua_event; |
284d8f55 | 1255 | |
5b4a0ec0 | 1256 | /* Get event node */ |
bec39940 DG |
1257 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
1258 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
edb67388 | 1259 | if (ua_event_node != NULL) { |
fc34caaa | 1260 | ret = -EEXIST; |
edb67388 DG |
1261 | goto end; |
1262 | } | |
5b4a0ec0 | 1263 | |
edb67388 DG |
1264 | /* Does not exist so create one */ |
1265 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
1266 | if (ua_event == NULL) { | |
1267 | /* Only malloc can failed so something is really wrong */ | |
1268 | ret = -ENOMEM; | |
fc34caaa | 1269 | goto end; |
5b4a0ec0 | 1270 | } |
edb67388 | 1271 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 1272 | |
edb67388 | 1273 | /* Create it on the tracer side */ |
5b4a0ec0 | 1274 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 1275 | if (ret < 0) { |
fc34caaa | 1276 | /* Not found previously means that it does not exist on the tracer */ |
49c336c1 | 1277 | assert(ret == -LTTNG_UST_ERR_EXIST); |
284d8f55 DG |
1278 | goto error; |
1279 | } | |
1280 | ||
bec39940 | 1281 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
284d8f55 | 1282 | |
fc34caaa | 1283 | DBG2("UST app create event %s for PID %d completed", ua_event->name, |
852d0037 | 1284 | app->pid); |
7f79d3a1 | 1285 | |
edb67388 | 1286 | end: |
fc34caaa DG |
1287 | return ret; |
1288 | ||
5b4a0ec0 | 1289 | error: |
fc34caaa DG |
1290 | /* Valid. Calling here is already in a read side lock */ |
1291 | delete_ust_app_event(-1, ua_event); | |
edb67388 | 1292 | return ret; |
5b4a0ec0 DG |
1293 | } |
1294 | ||
1295 | /* | |
1296 | * Create UST metadata and open it on the tracer side. | |
1297 | */ | |
1298 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
1299 | char *pathname, struct ust_app *app) | |
1300 | { | |
1301 | int ret = 0; | |
1302 | ||
1303 | if (ua_sess->metadata == NULL) { | |
1304 | /* Allocate UST metadata */ | |
1305 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
1306 | if (ua_sess->metadata == NULL) { | |
fc34caaa | 1307 | /* malloc() failed */ |
5b4a0ec0 DG |
1308 | goto error; |
1309 | } | |
1310 | ||
1311 | ret = open_ust_metadata(app, ua_sess); | |
1312 | if (ret < 0) { | |
7db205b5 DG |
1313 | DBG3("Opening metadata failed. Cleaning up memory"); |
1314 | ||
fc34caaa DG |
1315 | /* Cleanup failed metadata struct */ |
1316 | free(ua_sess->metadata); | |
7db205b5 DG |
1317 | /* |
1318 | * This is very important because delete_ust_app_session check if | |
1319 | * the pointer is null or not in order to delete the metadata. | |
1320 | */ | |
1321 | ua_sess->metadata = NULL; | |
5b4a0ec0 DG |
1322 | goto error; |
1323 | } | |
1324 | ||
852d0037 | 1325 | DBG2("UST metadata opened for app pid %d", app->pid); |
5b4a0ec0 DG |
1326 | } |
1327 | ||
1328 | /* Open UST metadata stream */ | |
1329 | if (ua_sess->metadata->stream_obj == NULL) { | |
1330 | ret = create_ust_stream(app, ua_sess); | |
1331 | if (ret < 0) { | |
1332 | goto error; | |
1333 | } | |
1334 | ||
477d7741 MD |
1335 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
1336 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
1337 | if (ret < 0) { |
1338 | PERROR("asprintf UST create stream"); | |
1339 | goto error; | |
1340 | } | |
1341 | ||
1342 | DBG2("UST metadata stream object created for app pid %d", | |
852d0037 | 1343 | app->pid); |
5b4a0ec0 DG |
1344 | } else { |
1345 | ERR("Attempting to create stream without metadata opened"); | |
1346 | goto error; | |
1347 | } | |
1348 | ||
1349 | return 0; | |
1350 | ||
1351 | error: | |
1352 | return -1; | |
1353 | } | |
1354 | ||
1355 | /* | |
1356 | * Return pointer to traceable apps list. | |
1357 | */ | |
bec39940 | 1358 | struct lttng_ht *ust_app_get_ht(void) |
5b4a0ec0 DG |
1359 | { |
1360 | return ust_app_ht; | |
1361 | } | |
1362 | ||
1363 | /* | |
1364 | * Return ust app pointer or NULL if not found. | |
1365 | */ | |
1366 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
1367 | { | |
bec39940 DG |
1368 | struct lttng_ht_node_ulong *node; |
1369 | struct lttng_ht_iter iter; | |
5b4a0ec0 DG |
1370 | |
1371 | rcu_read_lock(); | |
bec39940 DG |
1372 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) pid), &iter); |
1373 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1374 | if (node == NULL) { |
1375 | DBG2("UST app no found with pid %d", pid); | |
1376 | goto error; | |
1377 | } | |
1378 | rcu_read_unlock(); | |
1379 | ||
1380 | DBG2("Found UST app by pid %d", pid); | |
1381 | ||
852d0037 | 1382 | return caa_container_of(node, struct ust_app, pid_n); |
5b4a0ec0 DG |
1383 | |
1384 | error: | |
1385 | rcu_read_unlock(); | |
1386 | return NULL; | |
1387 | } | |
1388 | ||
1389 | /* | |
1390 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
1391 | * add it to the global traceable app list. | |
1392 | * | |
0df502fd MD |
1393 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
1394 | * bitness is not supported. | |
5b4a0ec0 DG |
1395 | */ |
1396 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
1397 | { | |
1398 | struct ust_app *lta; | |
799e2c4f | 1399 | int ret; |
5b4a0ec0 | 1400 | |
173af62f DG |
1401 | if ((msg->bits_per_long == 64 && |
1402 | (uatomic_read(&ust_consumerd64_fd) == -EINVAL)) | |
1403 | || (msg->bits_per_long == 32 && | |
1404 | (uatomic_read(&ust_consumerd32_fd) == -EINVAL))) { | |
f943b0fb | 1405 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1406 | "%d-bit long, but no consumerd for this long size is available.\n", |
1407 | msg->name, msg->pid, msg->bits_per_long); | |
799e2c4f MD |
1408 | ret = close(sock); |
1409 | if (ret) { | |
1410 | PERROR("close"); | |
1411 | } | |
4063050c | 1412 | lttng_fd_put(LTTNG_FD_APPS, 1); |
0df502fd MD |
1413 | return -EINVAL; |
1414 | } | |
3f2c5fcc MD |
1415 | if (msg->major != LTTNG_UST_COMM_MAJOR) { |
1416 | ERR("Registration failed: application \"%s\" (pid: %d) has " | |
1417 | "communication protocol version %u.%u, but sessiond supports 2.x.\n", | |
1418 | msg->name, msg->pid, msg->major, msg->minor); | |
799e2c4f MD |
1419 | ret = close(sock); |
1420 | if (ret) { | |
1421 | PERROR("close"); | |
1422 | } | |
4063050c | 1423 | lttng_fd_put(LTTNG_FD_APPS, 1); |
3f2c5fcc MD |
1424 | return -EINVAL; |
1425 | } | |
5b4a0ec0 DG |
1426 | lta = zmalloc(sizeof(struct ust_app)); |
1427 | if (lta == NULL) { | |
1428 | PERROR("malloc"); | |
1429 | return -ENOMEM; | |
1430 | } | |
1431 | ||
1432 | lta->ppid = msg->ppid; | |
1433 | lta->uid = msg->uid; | |
1434 | lta->gid = msg->gid; | |
e0c7ec2b | 1435 | lta->compatible = 0; /* Not compatible until proven */ |
7753dea8 | 1436 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1437 | lta->v_major = msg->major; |
1438 | lta->v_minor = msg->minor; | |
1439 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1440 | lta->name[16] = '\0'; | |
bec39940 | 1441 | lta->sessions = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
5b4a0ec0 | 1442 | |
852d0037 DG |
1443 | lta->pid = msg->pid; |
1444 | lttng_ht_node_init_ulong(<a->pid_n, (unsigned long)lta->pid); | |
1445 | lta->sock = sock; | |
1446 | lttng_ht_node_init_ulong(<a->sock_n, (unsigned long)lta->sock); | |
5b4a0ec0 DG |
1447 | |
1448 | rcu_read_lock(); | |
852d0037 DG |
1449 | |
1450 | /* | |
1451 | * On a re-registration, we want to kick out the previous registration of | |
1452 | * that pid | |
1453 | */ | |
1454 | lttng_ht_add_replace_ulong(ust_app_ht, <a->pid_n); | |
1455 | ||
1456 | /* | |
1457 | * The socket _should_ be unique until _we_ call close. So, a add_unique | |
1458 | * for the ust_app_ht_by_sock is used which asserts fail if the entry was | |
1459 | * already in the table. | |
1460 | */ | |
1461 | lttng_ht_add_unique_ulong(ust_app_ht_by_sock, <a->sock_n); | |
1462 | ||
5b4a0ec0 DG |
1463 | rcu_read_unlock(); |
1464 | ||
1465 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
852d0037 DG |
1466 | " (version %d.%d)", lta->pid, lta->ppid, lta->uid, lta->gid, |
1467 | lta->sock, lta->name, lta->v_major, lta->v_minor); | |
5b4a0ec0 DG |
1468 | |
1469 | return 0; | |
1470 | } | |
1471 | ||
1472 | /* | |
1473 | * Unregister app by removing it from the global traceable app list and freeing | |
1474 | * the data struct. | |
1475 | * | |
1476 | * The socket is already closed at this point so no close to sock. | |
1477 | */ | |
1478 | void ust_app_unregister(int sock) | |
1479 | { | |
1480 | struct ust_app *lta; | |
bec39940 DG |
1481 | struct lttng_ht_node_ulong *node; |
1482 | struct lttng_ht_iter iter; | |
525b0740 | 1483 | int ret; |
5b4a0ec0 DG |
1484 | |
1485 | rcu_read_lock(); | |
886459c6 | 1486 | |
5b4a0ec0 | 1487 | /* Get the node reference for a call_rcu */ |
852d0037 | 1488 | lttng_ht_lookup(ust_app_ht_by_sock, (void *)((unsigned long) sock), &iter); |
bec39940 | 1489 | node = lttng_ht_iter_get_node_ulong(&iter); |
5b4a0ec0 | 1490 | if (node == NULL) { |
852d0037 | 1491 | ERR("Unable to find app by sock %d", sock); |
5b4a0ec0 DG |
1492 | goto error; |
1493 | } | |
284d8f55 | 1494 | |
852d0037 DG |
1495 | lta = caa_container_of(node, struct ust_app, sock_n); |
1496 | ||
1497 | DBG("PID %d unregistering with sock %d", lta->pid, sock); | |
1498 | ||
886459c6 | 1499 | /* Remove application from PID hash table */ |
852d0037 DG |
1500 | ret = lttng_ht_del(ust_app_ht_by_sock, &iter); |
1501 | assert(!ret); | |
1502 | ||
1503 | /* Assign second node for deletion */ | |
1504 | iter.iter.node = <a->pid_n.node; | |
1505 | ||
5b98a774 DG |
1506 | /* |
1507 | * Ignore return value since the node might have been removed before by an | |
1508 | * add replace during app registration because the PID can be reassigned by | |
1509 | * the OS. | |
1510 | */ | |
bec39940 | 1511 | ret = lttng_ht_del(ust_app_ht, &iter); |
5b98a774 DG |
1512 | if (ret) { |
1513 | DBG3("Unregister app by PID %d failed. This can happen on pid reuse", | |
1514 | lta->pid); | |
1515 | } | |
852d0037 DG |
1516 | |
1517 | /* Free memory */ | |
1518 | call_rcu(<a->pid_n.head, delete_ust_app_rcu); | |
1519 | ||
284d8f55 | 1520 | error: |
5b4a0ec0 DG |
1521 | rcu_read_unlock(); |
1522 | return; | |
284d8f55 DG |
1523 | } |
1524 | ||
1525 | /* | |
5b4a0ec0 | 1526 | * Return traceable_app_count |
284d8f55 | 1527 | */ |
5b4a0ec0 | 1528 | unsigned long ust_app_list_count(void) |
284d8f55 | 1529 | { |
5b4a0ec0 | 1530 | unsigned long count; |
284d8f55 | 1531 | |
5b4a0ec0 | 1532 | rcu_read_lock(); |
bec39940 | 1533 | count = lttng_ht_get_count(ust_app_ht); |
5b4a0ec0 | 1534 | rcu_read_unlock(); |
284d8f55 | 1535 | |
5b4a0ec0 | 1536 | return count; |
284d8f55 DG |
1537 | } |
1538 | ||
5b4a0ec0 DG |
1539 | /* |
1540 | * Fill events array with all events name of all registered apps. | |
1541 | */ | |
1542 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1543 | { |
5b4a0ec0 DG |
1544 | int ret, handle; |
1545 | size_t nbmem, count = 0; | |
bec39940 | 1546 | struct lttng_ht_iter iter; |
5b4a0ec0 DG |
1547 | struct ust_app *app; |
1548 | struct lttng_event *tmp; | |
421cb601 | 1549 | |
5b4a0ec0 DG |
1550 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1551 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1552 | if (tmp == NULL) { | |
1553 | PERROR("zmalloc ust app events"); | |
1554 | ret = -ENOMEM; | |
421cb601 DG |
1555 | goto error; |
1556 | } | |
1557 | ||
5b4a0ec0 | 1558 | rcu_read_lock(); |
421cb601 | 1559 | |
852d0037 | 1560 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
90eaa0d2 | 1561 | struct lttng_ust_tracepoint_iter uiter; |
ac3bd9c0 | 1562 | |
86acf0da DG |
1563 | health_code_update(&health_thread_cmd); |
1564 | ||
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 | } | |
852d0037 | 1572 | handle = ustctl_tracepoint_list(app->sock); |
5b4a0ec0 DG |
1573 | if (handle < 0) { |
1574 | ERR("UST app list events getting handle failed for app pid %d", | |
852d0037 | 1575 | app->pid); |
5b4a0ec0 DG |
1576 | continue; |
1577 | } | |
421cb601 | 1578 | |
852d0037 | 1579 | while ((ret = ustctl_tracepoint_list_get(app->sock, handle, |
fb54cdbf | 1580 | &uiter)) != -LTTNG_UST_ERR_NOENT) { |
86acf0da | 1581 | health_code_update(&health_thread_cmd); |
815564d8 | 1582 | if (count >= nbmem) { |
d7b3776f DG |
1583 | /* In case the realloc fails, we free the memory */ |
1584 | void *tmp_ptr = (void *) tmp; | |
815564d8 MD |
1585 | DBG2("Reallocating event list from %zu to %zu entries", nbmem, |
1586 | 2 * nbmem); | |
1587 | nbmem *= 2; | |
2f221590 | 1588 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event)); |
5b4a0ec0 DG |
1589 | if (tmp == NULL) { |
1590 | PERROR("realloc ust app events"); | |
d7b3776f | 1591 | free(tmp_ptr); |
5b4a0ec0 DG |
1592 | ret = -ENOMEM; |
1593 | goto rcu_error; | |
1594 | } | |
1595 | } | |
90eaa0d2 | 1596 | memcpy(tmp[count].name, uiter.name, LTTNG_UST_SYM_NAME_LEN); |
8005f29a | 1597 | tmp[count].loglevel = uiter.loglevel; |
6775595e | 1598 | tmp[count].type = (enum lttng_event_type) LTTNG_UST_TRACEPOINT; |
852d0037 | 1599 | tmp[count].pid = app->pid; |
5b4a0ec0 DG |
1600 | tmp[count].enabled = -1; |
1601 | count++; | |
421cb601 | 1602 | } |
421cb601 DG |
1603 | } |
1604 | ||
5b4a0ec0 DG |
1605 | ret = count; |
1606 | *events = tmp; | |
421cb601 | 1607 | |
5b4a0ec0 | 1608 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1609 | |
5b4a0ec0 DG |
1610 | rcu_error: |
1611 | rcu_read_unlock(); | |
421cb601 | 1612 | error: |
86acf0da | 1613 | health_code_update(&health_thread_cmd); |
5b4a0ec0 | 1614 | return ret; |
421cb601 DG |
1615 | } |
1616 | ||
f37d259d MD |
1617 | /* |
1618 | * Fill events array with all events name of all registered apps. | |
1619 | */ | |
1620 | int ust_app_list_event_fields(struct lttng_event_field **fields) | |
1621 | { | |
1622 | int ret, handle; | |
1623 | size_t nbmem, count = 0; | |
1624 | struct lttng_ht_iter iter; | |
1625 | struct ust_app *app; | |
1626 | struct lttng_event_field *tmp; | |
1627 | ||
1628 | nbmem = UST_APP_EVENT_LIST_SIZE; | |
1629 | tmp = zmalloc(nbmem * sizeof(struct lttng_event_field)); | |
1630 | if (tmp == NULL) { | |
1631 | PERROR("zmalloc ust app event fields"); | |
1632 | ret = -ENOMEM; | |
1633 | goto error; | |
1634 | } | |
1635 | ||
1636 | rcu_read_lock(); | |
1637 | ||
1638 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { | |
1639 | struct lttng_ust_field_iter uiter; | |
1640 | ||
86acf0da DG |
1641 | health_code_update(&health_thread_cmd); |
1642 | ||
f37d259d MD |
1643 | if (!app->compatible) { |
1644 | /* | |
1645 | * TODO: In time, we should notice the caller of this error by | |
1646 | * telling him that this is a version error. | |
1647 | */ | |
1648 | continue; | |
1649 | } | |
1650 | handle = ustctl_tracepoint_field_list(app->sock); | |
1651 | if (handle < 0) { | |
1652 | ERR("UST app list event fields getting handle failed for app pid %d", | |
1653 | app->pid); | |
1654 | continue; | |
1655 | } | |
1656 | ||
1657 | while ((ret = ustctl_tracepoint_field_list_get(app->sock, handle, | |
fb54cdbf | 1658 | &uiter)) != -LTTNG_UST_ERR_NOENT) { |
86acf0da | 1659 | health_code_update(&health_thread_cmd); |
f37d259d | 1660 | if (count >= nbmem) { |
d7b3776f DG |
1661 | /* In case the realloc fails, we free the memory */ |
1662 | void *tmp_ptr = (void *) tmp; | |
f37d259d MD |
1663 | DBG2("Reallocating event field list from %zu to %zu entries", nbmem, |
1664 | 2 * nbmem); | |
1665 | nbmem *= 2; | |
1666 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event_field)); | |
1667 | if (tmp == NULL) { | |
1668 | PERROR("realloc ust app event fields"); | |
d7b3776f | 1669 | free(tmp_ptr); |
f37d259d MD |
1670 | ret = -ENOMEM; |
1671 | goto rcu_error; | |
1672 | } | |
1673 | } | |
f37d259d MD |
1674 | |
1675 | memcpy(tmp[count].field_name, uiter.field_name, LTTNG_UST_SYM_NAME_LEN); | |
1676 | tmp[count].type = uiter.type; | |
590b9e3c | 1677 | tmp[count].nowrite = uiter.nowrite; |
f37d259d MD |
1678 | |
1679 | memcpy(tmp[count].event.name, uiter.event_name, LTTNG_UST_SYM_NAME_LEN); | |
1680 | tmp[count].event.loglevel = uiter.loglevel; | |
1681 | tmp[count].event.type = LTTNG_UST_TRACEPOINT; | |
1682 | tmp[count].event.pid = app->pid; | |
1683 | tmp[count].event.enabled = -1; | |
1684 | count++; | |
1685 | } | |
1686 | } | |
1687 | ||
1688 | ret = count; | |
1689 | *fields = tmp; | |
1690 | ||
1691 | DBG2("UST app list event fields done (%zu events)", count); | |
1692 | ||
1693 | rcu_error: | |
1694 | rcu_read_unlock(); | |
1695 | error: | |
86acf0da | 1696 | health_code_update(&health_thread_cmd); |
f37d259d MD |
1697 | return ret; |
1698 | } | |
1699 | ||
5b4a0ec0 DG |
1700 | /* |
1701 | * Free and clean all traceable apps of the global list. | |
1702 | */ | |
1703 | void ust_app_clean_list(void) | |
421cb601 | 1704 | { |
5b4a0ec0 | 1705 | int ret; |
659ed79f | 1706 | struct ust_app *app; |
bec39940 | 1707 | struct lttng_ht_iter iter; |
421cb601 | 1708 | |
5b4a0ec0 | 1709 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1710 | |
5b4a0ec0 | 1711 | rcu_read_lock(); |
421cb601 | 1712 | |
659ed79f | 1713 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
bec39940 | 1714 | ret = lttng_ht_del(ust_app_ht, &iter); |
525b0740 | 1715 | assert(!ret); |
659ed79f | 1716 | call_rcu(&app->pid_n.head, delete_ust_app_rcu); |
421cb601 DG |
1717 | } |
1718 | ||
852d0037 | 1719 | /* Cleanup socket hash table */ |
659ed79f DG |
1720 | cds_lfht_for_each_entry(ust_app_ht_by_sock->ht, &iter.iter, app, |
1721 | sock_n.node) { | |
852d0037 | 1722 | ret = lttng_ht_del(ust_app_ht_by_sock, &iter); |
bec39940 DG |
1723 | assert(!ret); |
1724 | } | |
852d0037 | 1725 | |
bec39940 | 1726 | /* Destroy is done only when the ht is empty */ |
852d0037 DG |
1727 | lttng_ht_destroy(ust_app_ht); |
1728 | lttng_ht_destroy(ust_app_ht_by_sock); | |
421cb601 | 1729 | |
5b4a0ec0 DG |
1730 | rcu_read_unlock(); |
1731 | } | |
1732 | ||
1733 | /* | |
1734 | * Init UST app hash table. | |
1735 | */ | |
1736 | void ust_app_ht_alloc(void) | |
1737 | { | |
bec39940 | 1738 | ust_app_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
852d0037 | 1739 | ust_app_ht_by_sock = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
421cb601 DG |
1740 | } |
1741 | ||
78f0bacd DG |
1742 | /* |
1743 | * For a specific UST session, disable the channel for all registered apps. | |
1744 | */ | |
35a9059d | 1745 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1746 | struct ltt_ust_channel *uchan) |
1747 | { | |
1748 | int ret = 0; | |
bec39940 DG |
1749 | struct lttng_ht_iter iter; |
1750 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1751 | struct ust_app *app; |
1752 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1753 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1754 | |
1755 | if (usess == NULL || uchan == NULL) { | |
1756 | ERR("Disabling UST global channel with NULL values"); | |
1757 | ret = -1; | |
1758 | goto error; | |
1759 | } | |
1760 | ||
a991f516 MD |
1761 | DBG2("UST app disabling channel %s from global domain for session id %d", |
1762 | uchan->name, usess->id); | |
78f0bacd DG |
1763 | |
1764 | rcu_read_lock(); | |
1765 | ||
1766 | /* For every registered applications */ | |
852d0037 | 1767 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
bec39940 | 1768 | struct lttng_ht_iter uiter; |
e0c7ec2b DG |
1769 | if (!app->compatible) { |
1770 | /* | |
1771 | * TODO: In time, we should notice the caller of this error by | |
1772 | * telling him that this is a version error. | |
1773 | */ | |
1774 | continue; | |
1775 | } | |
78f0bacd DG |
1776 | ua_sess = lookup_session_by_app(usess, app); |
1777 | if (ua_sess == NULL) { | |
1778 | continue; | |
1779 | } | |
1780 | ||
8535a6d9 | 1781 | /* Get channel */ |
bec39940 DG |
1782 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1783 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
8535a6d9 DG |
1784 | /* If the session if found for the app, the channel must be there */ |
1785 | assert(ua_chan_node); | |
1786 | ||
1787 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1788 | /* The channel must not be already disabled */ | |
1789 | assert(ua_chan->enabled == 1); | |
1790 | ||
1791 | /* Disable channel onto application */ | |
1792 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1793 | if (ret < 0) { |
1794 | /* XXX: We might want to report this error at some point... */ | |
1795 | continue; | |
1796 | } | |
1797 | } | |
1798 | ||
1799 | rcu_read_unlock(); | |
1800 | ||
1801 | error: | |
1802 | return ret; | |
1803 | } | |
1804 | ||
1805 | /* | |
1806 | * For a specific UST session, enable the channel for all registered apps. | |
1807 | */ | |
35a9059d | 1808 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1809 | struct ltt_ust_channel *uchan) |
1810 | { | |
1811 | int ret = 0; | |
bec39940 | 1812 | struct lttng_ht_iter iter; |
78f0bacd DG |
1813 | struct ust_app *app; |
1814 | struct ust_app_session *ua_sess; | |
1815 | ||
1816 | if (usess == NULL || uchan == NULL) { | |
1817 | ERR("Adding UST global channel to NULL values"); | |
1818 | ret = -1; | |
1819 | goto error; | |
1820 | } | |
1821 | ||
a991f516 MD |
1822 | DBG2("UST app enabling channel %s to global domain for session id %d", |
1823 | uchan->name, usess->id); | |
78f0bacd DG |
1824 | |
1825 | rcu_read_lock(); | |
1826 | ||
1827 | /* For every registered applications */ | |
852d0037 | 1828 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1829 | if (!app->compatible) { |
1830 | /* | |
1831 | * TODO: In time, we should notice the caller of this error by | |
1832 | * telling him that this is a version error. | |
1833 | */ | |
1834 | continue; | |
1835 | } | |
78f0bacd DG |
1836 | ua_sess = lookup_session_by_app(usess, app); |
1837 | if (ua_sess == NULL) { | |
1838 | continue; | |
1839 | } | |
1840 | ||
1841 | /* Enable channel onto application */ | |
1842 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1843 | if (ret < 0) { | |
1844 | /* XXX: We might want to report this error at some point... */ | |
1845 | continue; | |
1846 | } | |
1847 | } | |
1848 | ||
1849 | rcu_read_unlock(); | |
1850 | ||
1851 | error: | |
1852 | return ret; | |
1853 | } | |
1854 | ||
b0a40d28 DG |
1855 | /* |
1856 | * Disable an event in a channel and for a specific session. | |
1857 | */ | |
35a9059d DG |
1858 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
1859 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
1860 | { |
1861 | int ret = 0; | |
bec39940 DG |
1862 | struct lttng_ht_iter iter, uiter; |
1863 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
b0a40d28 DG |
1864 | struct ust_app *app; |
1865 | struct ust_app_session *ua_sess; | |
1866 | struct ust_app_channel *ua_chan; | |
1867 | struct ust_app_event *ua_event; | |
1868 | ||
1869 | DBG("UST app disabling event %s for all apps in channel " | |
a991f516 | 1870 | "%s for session id %d", uevent->attr.name, uchan->name, usess->id); |
b0a40d28 DG |
1871 | |
1872 | rcu_read_lock(); | |
1873 | ||
1874 | /* For all registered applications */ | |
852d0037 | 1875 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1876 | if (!app->compatible) { |
1877 | /* | |
1878 | * TODO: In time, we should notice the caller of this error by | |
1879 | * telling him that this is a version error. | |
1880 | */ | |
1881 | continue; | |
1882 | } | |
b0a40d28 DG |
1883 | ua_sess = lookup_session_by_app(usess, app); |
1884 | if (ua_sess == NULL) { | |
1885 | /* Next app */ | |
1886 | continue; | |
1887 | } | |
1888 | ||
1889 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1890 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1891 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 | 1892 | if (ua_chan_node == NULL) { |
a991f516 | 1893 | DBG2("Channel %s not found in session id %d for app pid %d." |
852d0037 | 1894 | "Skipping", uchan->name, usess->id, app->pid); |
b0a40d28 DG |
1895 | continue; |
1896 | } | |
1897 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1898 | ||
bec39940 DG |
1899 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
1900 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 DG |
1901 | if (ua_event_node == NULL) { |
1902 | DBG2("Event %s not found in channel %s for app pid %d." | |
852d0037 | 1903 | "Skipping", uevent->attr.name, uchan->name, app->pid); |
b0a40d28 DG |
1904 | continue; |
1905 | } | |
1906 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1907 | ||
7f79d3a1 | 1908 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
b0a40d28 DG |
1909 | if (ret < 0) { |
1910 | /* XXX: Report error someday... */ | |
1911 | continue; | |
1912 | } | |
1913 | } | |
1914 | ||
1915 | rcu_read_unlock(); | |
1916 | ||
1917 | return ret; | |
1918 | } | |
1919 | ||
9730260e | 1920 | /* |
edb67388 | 1921 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
1922 | * registered apps. |
1923 | */ | |
35a9059d | 1924 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
1925 | struct ltt_ust_channel *uchan) |
1926 | { | |
1927 | int ret = 0; | |
bec39940 DG |
1928 | struct lttng_ht_iter iter, uiter; |
1929 | struct lttng_ht_node_str *ua_chan_node; | |
9730260e DG |
1930 | struct ust_app *app; |
1931 | struct ust_app_session *ua_sess; | |
1932 | struct ust_app_channel *ua_chan; | |
1933 | struct ust_app_event *ua_event; | |
1934 | ||
1935 | DBG("UST app disabling all event for all apps in channel " | |
a991f516 | 1936 | "%s for session id %d", uchan->name, usess->id); |
9730260e DG |
1937 | |
1938 | rcu_read_lock(); | |
1939 | ||
1940 | /* For all registered applications */ | |
852d0037 | 1941 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1942 | if (!app->compatible) { |
1943 | /* | |
1944 | * TODO: In time, we should notice the caller of this error by | |
1945 | * telling him that this is a version error. | |
1946 | */ | |
1947 | continue; | |
1948 | } | |
9730260e | 1949 | ua_sess = lookup_session_by_app(usess, app); |
edb67388 DG |
1950 | /* If ua_sess is NULL, there is a code flow error */ |
1951 | assert(ua_sess); | |
9730260e DG |
1952 | |
1953 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1954 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1955 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1956 | /* If the channel is not found, there is a code flow error */ |
1957 | assert(ua_chan_node); | |
1958 | ||
9730260e DG |
1959 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1960 | ||
1961 | /* Disable each events of channel */ | |
bec39940 DG |
1962 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
1963 | node.node) { | |
7f79d3a1 | 1964 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
9730260e DG |
1965 | if (ret < 0) { |
1966 | /* XXX: Report error someday... */ | |
1967 | continue; | |
1968 | } | |
1969 | } | |
1970 | } | |
1971 | ||
1972 | rcu_read_unlock(); | |
1973 | ||
1974 | return ret; | |
1975 | } | |
1976 | ||
421cb601 | 1977 | /* |
5b4a0ec0 | 1978 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1979 | */ |
35a9059d | 1980 | int ust_app_create_channel_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1981 | struct ltt_ust_channel *uchan) |
1982 | { | |
3c14c33f | 1983 | int ret = 0; |
bec39940 | 1984 | struct lttng_ht_iter iter; |
48842b30 DG |
1985 | struct ust_app *app; |
1986 | struct ust_app_session *ua_sess; | |
1987 | struct ust_app_channel *ua_chan; | |
1988 | ||
fc34caaa DG |
1989 | /* Very wrong code flow */ |
1990 | assert(usess); | |
1991 | assert(uchan); | |
421cb601 | 1992 | |
a991f516 MD |
1993 | DBG2("UST app adding channel %s to global domain for session id %d", |
1994 | uchan->name, usess->id); | |
48842b30 DG |
1995 | |
1996 | rcu_read_lock(); | |
421cb601 | 1997 | |
5b4a0ec0 | 1998 | /* For every registered applications */ |
852d0037 | 1999 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2000 | if (!app->compatible) { |
2001 | /* | |
2002 | * TODO: In time, we should notice the caller of this error by | |
2003 | * telling him that this is a version error. | |
2004 | */ | |
2005 | continue; | |
2006 | } | |
edb67388 DG |
2007 | /* |
2008 | * Create session on the tracer side and add it to app session HT. Note | |
2009 | * that if session exist, it will simply return a pointer to the ust | |
2010 | * app session. | |
2011 | */ | |
421cb601 | 2012 | ua_sess = create_ust_app_session(usess, app); |
509cbaf8 | 2013 | if (ua_sess == NULL) { |
915d047c | 2014 | /* The malloc() failed. */ |
3c14c33f | 2015 | ret = -1; |
fc34caaa | 2016 | goto error; |
915d047c DG |
2017 | } else if (ua_sess == (void *) -1UL) { |
2018 | /* The application's socket is not valid. Contiuing */ | |
3c14c33f | 2019 | ret = -1; |
915d047c | 2020 | continue; |
48842b30 DG |
2021 | } |
2022 | ||
421cb601 DG |
2023 | /* Create channel onto application */ |
2024 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
2025 | if (ua_chan == NULL) { | |
fc34caaa | 2026 | /* Major problem here and it's maybe the tracer or malloc() */ |
3c14c33f | 2027 | ret = -1; |
fc34caaa | 2028 | goto error; |
48842b30 | 2029 | } |
48842b30 | 2030 | } |
5b4a0ec0 | 2031 | |
48842b30 DG |
2032 | rcu_read_unlock(); |
2033 | ||
421cb601 | 2034 | error: |
3c14c33f | 2035 | return ret; |
48842b30 DG |
2036 | } |
2037 | ||
5b4a0ec0 | 2038 | /* |
edb67388 | 2039 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 2040 | */ |
35a9059d | 2041 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
2042 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
2043 | { | |
2044 | int ret = 0; | |
bec39940 DG |
2045 | struct lttng_ht_iter iter, uiter; |
2046 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
48842b30 DG |
2047 | struct ust_app *app; |
2048 | struct ust_app_session *ua_sess; | |
2049 | struct ust_app_channel *ua_chan; | |
2050 | struct ust_app_event *ua_event; | |
48842b30 | 2051 | |
a991f516 MD |
2052 | DBG("UST app enabling event %s for all apps for session id %d", |
2053 | uevent->attr.name, usess->id); | |
48842b30 | 2054 | |
edb67388 DG |
2055 | /* |
2056 | * NOTE: At this point, this function is called only if the session and | |
2057 | * channel passed are already created for all apps. and enabled on the | |
2058 | * tracer also. | |
2059 | */ | |
2060 | ||
48842b30 | 2061 | rcu_read_lock(); |
421cb601 DG |
2062 | |
2063 | /* For all registered applications */ | |
852d0037 | 2064 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2065 | if (!app->compatible) { |
2066 | /* | |
2067 | * TODO: In time, we should notice the caller of this error by | |
2068 | * telling him that this is a version error. | |
2069 | */ | |
2070 | continue; | |
2071 | } | |
edb67388 DG |
2072 | ua_sess = lookup_session_by_app(usess, app); |
2073 | /* If ua_sess is NULL, there is a code flow error */ | |
2074 | assert(ua_sess); | |
ba767faf | 2075 | |
edb67388 | 2076 | /* Lookup channel in the ust app session */ |
bec39940 DG |
2077 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2078 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
2079 | /* If the channel is not found, there is a code flow error */ |
2080 | assert(ua_chan_node); | |
2081 | ||
2082 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2083 | ||
bec39940 DG |
2084 | lttng_ht_lookup(ua_chan->events, (void*)uevent->attr.name, &uiter); |
2085 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
35a9059d | 2086 | if (ua_event_node == NULL) { |
7f79d3a1 | 2087 | DBG3("UST app enable event %s not found for app PID %d." |
852d0037 | 2088 | "Skipping app", uevent->attr.name, app->pid); |
35a9059d DG |
2089 | continue; |
2090 | } | |
2091 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2092 | ||
2093 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2094 | if (ret < 0) { | |
7f79d3a1 | 2095 | goto error; |
48842b30 | 2096 | } |
edb67388 DG |
2097 | } |
2098 | ||
7f79d3a1 | 2099 | error: |
edb67388 | 2100 | rcu_read_unlock(); |
edb67388 DG |
2101 | return ret; |
2102 | } | |
2103 | ||
2104 | /* | |
2105 | * For a specific existing UST session and UST channel, creates the event for | |
2106 | * all registered apps. | |
2107 | */ | |
35a9059d | 2108 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
2109 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
2110 | { | |
2111 | int ret = 0; | |
bec39940 DG |
2112 | struct lttng_ht_iter iter, uiter; |
2113 | struct lttng_ht_node_str *ua_chan_node; | |
edb67388 DG |
2114 | struct ust_app *app; |
2115 | struct ust_app_session *ua_sess; | |
2116 | struct ust_app_channel *ua_chan; | |
2117 | ||
a991f516 MD |
2118 | DBG("UST app creating event %s for all apps for session id %d", |
2119 | uevent->attr.name, usess->id); | |
edb67388 | 2120 | |
edb67388 DG |
2121 | rcu_read_lock(); |
2122 | ||
2123 | /* For all registered applications */ | |
852d0037 | 2124 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2125 | if (!app->compatible) { |
2126 | /* | |
2127 | * TODO: In time, we should notice the caller of this error by | |
2128 | * telling him that this is a version error. | |
2129 | */ | |
2130 | continue; | |
2131 | } | |
edb67388 DG |
2132 | ua_sess = lookup_session_by_app(usess, app); |
2133 | /* If ua_sess is NULL, there is a code flow error */ | |
2134 | assert(ua_sess); | |
48842b30 DG |
2135 | |
2136 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2137 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2138 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
2139 | /* If the channel is not found, there is a code flow error */ |
2140 | assert(ua_chan_node); | |
2141 | ||
48842b30 DG |
2142 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
2143 | ||
edb67388 DG |
2144 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
2145 | if (ret < 0) { | |
49c336c1 | 2146 | if (ret != -LTTNG_UST_ERR_EXIST) { |
fc34caaa DG |
2147 | /* Possible value at this point: -ENOMEM. If so, we stop! */ |
2148 | break; | |
2149 | } | |
2150 | DBG2("UST app event %s already exist on app PID %d", | |
852d0037 | 2151 | uevent->attr.name, app->pid); |
5b4a0ec0 | 2152 | continue; |
48842b30 | 2153 | } |
48842b30 | 2154 | } |
5b4a0ec0 | 2155 | |
48842b30 DG |
2156 | rcu_read_unlock(); |
2157 | ||
2158 | return ret; | |
2159 | } | |
2160 | ||
5b4a0ec0 DG |
2161 | /* |
2162 | * Start tracing for a specific UST session and app. | |
2163 | */ | |
421cb601 | 2164 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
2165 | { |
2166 | int ret = 0; | |
bec39940 | 2167 | struct lttng_ht_iter iter; |
48842b30 DG |
2168 | struct ust_app_session *ua_sess; |
2169 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 2170 | struct ltt_ust_stream *ustream; |
173af62f | 2171 | struct consumer_socket *socket; |
48842b30 | 2172 | |
852d0037 | 2173 | DBG("Starting tracing for ust app pid %d", app->pid); |
5cf5d0e7 | 2174 | |
509cbaf8 MD |
2175 | rcu_read_lock(); |
2176 | ||
e0c7ec2b DG |
2177 | if (!app->compatible) { |
2178 | goto end; | |
2179 | } | |
2180 | ||
421cb601 DG |
2181 | ua_sess = lookup_session_by_app(usess, app); |
2182 | if (ua_sess == NULL) { | |
509cbaf8 | 2183 | goto error_rcu_unlock; |
421cb601 | 2184 | } |
48842b30 | 2185 | |
aea829b3 DG |
2186 | /* Upon restart, we skip the setup, already done */ |
2187 | if (ua_sess->started) { | |
8be98f9a | 2188 | goto skip_setup; |
aea829b3 | 2189 | } |
8be98f9a | 2190 | |
a4b92340 DG |
2191 | /* Create directories if consumer is LOCAL and has a path defined. */ |
2192 | if (usess->consumer->type == CONSUMER_DST_LOCAL && | |
2193 | strlen(usess->consumer->dst.trace_path) > 0) { | |
2194 | ret = run_as_mkdir_recursive(usess->consumer->dst.trace_path, | |
2195 | S_IRWXU | S_IRWXG, usess->uid, usess->gid); | |
2196 | if (ret < 0) { | |
2197 | if (ret != -EEXIST) { | |
2198 | ERR("Trace directory creation error"); | |
2199 | ret = -1; | |
2200 | goto error_rcu_unlock; | |
2201 | } | |
2202 | } | |
2203 | } | |
2204 | ||
f848c3eb DG |
2205 | /* Indicate that the session has been started once */ |
2206 | ua_sess->started = 1; | |
2207 | ||
421cb601 DG |
2208 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
2209 | if (ret < 0) { | |
f73fabfd | 2210 | ret = LTTNG_ERR_UST_META_FAIL; |
509cbaf8 | 2211 | goto error_rcu_unlock; |
421cb601 | 2212 | } |
48842b30 | 2213 | |
421cb601 | 2214 | /* For each channel */ |
bec39940 DG |
2215 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2216 | node.node) { | |
421cb601 DG |
2217 | /* Create all streams */ |
2218 | while (1) { | |
5b4a0ec0 | 2219 | /* Create UST stream */ |
421cb601 DG |
2220 | ustream = zmalloc(sizeof(*ustream)); |
2221 | if (ustream == NULL) { | |
2222 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 2223 | goto error_rcu_unlock; |
421cb601 | 2224 | } |
48842b30 | 2225 | |
4063050c MD |
2226 | /* We are going to receive 2 fds, we need to reserve them. */ |
2227 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
2228 | if (ret < 0) { | |
2229 | ERR("Exhausted number of available FD upon stream create"); | |
2230 | free(ustream); | |
2231 | goto error_rcu_unlock; | |
2232 | } | |
86acf0da DG |
2233 | |
2234 | health_code_update(&health_thread_cmd); | |
2235 | ||
852d0037 | 2236 | ret = ustctl_create_stream(app->sock, ua_chan->obj, |
421cb601 | 2237 | &ustream->obj); |
48842b30 | 2238 | if (ret < 0) { |
421cb601 | 2239 | /* Got all streams */ |
4063050c | 2240 | lttng_fd_put(LTTNG_FD_APPS, 2); |
a2c0da86 | 2241 | free(ustream); |
f73fabfd | 2242 | ret = LTTNG_ERR_UST_STREAM_FAIL; |
421cb601 | 2243 | break; |
48842b30 | 2244 | } |
421cb601 | 2245 | ustream->handle = ustream->obj->handle; |
48842b30 | 2246 | |
86acf0da DG |
2247 | health_code_update(&health_thread_cmd); |
2248 | ||
421cb601 DG |
2249 | /* Order is important */ |
2250 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
00e2e675 | 2251 | ret = snprintf(ustream->name, sizeof(ustream->name), "%s_%u", |
c30aaa51 MD |
2252 | ua_chan->name, ua_chan->streams.count); |
2253 | ua_chan->streams.count++; | |
aba8e916 DG |
2254 | if (ret < 0) { |
2255 | PERROR("asprintf UST create stream"); | |
a2c0da86 MD |
2256 | /* |
2257 | * XXX what should we do here with the | |
2258 | * stream ? | |
2259 | */ | |
421cb601 | 2260 | continue; |
aba8e916 | 2261 | } |
00e2e675 DG |
2262 | DBG2("UST stream %d ready (handle: %d)", ua_chan->streams.count, |
2263 | ustream->handle); | |
421cb601 | 2264 | } |
86acf0da DG |
2265 | |
2266 | health_code_update(&health_thread_cmd); | |
421cb601 | 2267 | } |
aba8e916 | 2268 | |
7753dea8 MD |
2269 | switch (app->bits_per_long) { |
2270 | case 64: | |
173af62f DG |
2271 | socket = consumer_find_socket(uatomic_read(&ust_consumerd64_fd), |
2272 | usess->consumer); | |
2273 | if (socket == NULL) { | |
2274 | goto skip_setup; | |
2275 | } | |
7753dea8 MD |
2276 | break; |
2277 | case 32: | |
173af62f DG |
2278 | socket = consumer_find_socket(uatomic_read(&ust_consumerd32_fd), |
2279 | usess->consumer); | |
2280 | if (socket == NULL) { | |
2281 | goto skip_setup; | |
2282 | } | |
7753dea8 MD |
2283 | break; |
2284 | default: | |
2285 | ret = -EINVAL; | |
2286 | goto error_rcu_unlock; | |
2287 | } | |
aea829b3 | 2288 | |
421cb601 | 2289 | /* Setup UST consumer socket and send fds to it */ |
173af62f | 2290 | ret = ust_consumer_send_session(ua_sess, usess->consumer, socket); |
421cb601 | 2291 | if (ret < 0) { |
509cbaf8 | 2292 | goto error_rcu_unlock; |
421cb601 | 2293 | } |
48842b30 | 2294 | |
86acf0da DG |
2295 | health_code_update(&health_thread_cmd); |
2296 | ||
8be98f9a | 2297 | skip_setup: |
421cb601 | 2298 | /* This start the UST tracing */ |
852d0037 | 2299 | ret = ustctl_start_session(app->sock, ua_sess->handle); |
421cb601 | 2300 | if (ret < 0) { |
852d0037 | 2301 | ERR("Error starting tracing for app pid: %d", app->pid); |
509cbaf8 | 2302 | goto error_rcu_unlock; |
421cb601 | 2303 | } |
5b4a0ec0 | 2304 | |
86acf0da DG |
2305 | health_code_update(&health_thread_cmd); |
2306 | ||
421cb601 | 2307 | /* Quiescent wait after starting trace */ |
852d0037 | 2308 | ustctl_wait_quiescent(app->sock); |
48842b30 | 2309 | |
e0c7ec2b DG |
2310 | end: |
2311 | rcu_read_unlock(); | |
86acf0da | 2312 | health_code_update(&health_thread_cmd); |
421cb601 | 2313 | return 0; |
48842b30 | 2314 | |
509cbaf8 MD |
2315 | error_rcu_unlock: |
2316 | rcu_read_unlock(); | |
86acf0da | 2317 | health_code_update(&health_thread_cmd); |
421cb601 DG |
2318 | return -1; |
2319 | } | |
48842b30 | 2320 | |
8be98f9a MD |
2321 | /* |
2322 | * Stop tracing for a specific UST session and app. | |
2323 | */ | |
2324 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2325 | { | |
2326 | int ret = 0; | |
bec39940 | 2327 | struct lttng_ht_iter iter; |
8be98f9a | 2328 | struct ust_app_session *ua_sess; |
6d3686da | 2329 | struct ust_app_channel *ua_chan; |
8be98f9a | 2330 | |
852d0037 | 2331 | DBG("Stopping tracing for ust app pid %d", app->pid); |
8be98f9a MD |
2332 | |
2333 | rcu_read_lock(); | |
2334 | ||
e0c7ec2b DG |
2335 | if (!app->compatible) { |
2336 | goto end; | |
2337 | } | |
2338 | ||
8be98f9a MD |
2339 | ua_sess = lookup_session_by_app(usess, app); |
2340 | if (ua_sess == NULL) { | |
2341 | /* Only malloc can failed so something is really wrong */ | |
2342 | goto error_rcu_unlock; | |
2343 | } | |
2344 | ||
9bc07046 DG |
2345 | /* |
2346 | * If started = 0, it means that stop trace has been called for a session | |
2347 | * that was never started. This is a code flow error and should never | |
2348 | * happen. | |
2349 | */ | |
2350 | assert(ua_sess->started == 1); | |
7db205b5 | 2351 | |
86acf0da DG |
2352 | health_code_update(&health_thread_cmd); |
2353 | ||
9d6c7d3f | 2354 | /* This inhibits UST tracing */ |
852d0037 | 2355 | ret = ustctl_stop_session(app->sock, ua_sess->handle); |
9d6c7d3f | 2356 | if (ret < 0) { |
852d0037 | 2357 | ERR("Error stopping tracing for app pid: %d", app->pid); |
9d6c7d3f DG |
2358 | goto error_rcu_unlock; |
2359 | } | |
2360 | ||
86acf0da DG |
2361 | health_code_update(&health_thread_cmd); |
2362 | ||
9d6c7d3f | 2363 | /* Quiescent wait after stopping trace */ |
852d0037 | 2364 | ustctl_wait_quiescent(app->sock); |
9d6c7d3f | 2365 | |
86acf0da DG |
2366 | health_code_update(&health_thread_cmd); |
2367 | ||
9d6c7d3f | 2368 | /* Flushing buffers */ |
bec39940 DG |
2369 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2370 | node.node) { | |
86acf0da | 2371 | health_code_update(&health_thread_cmd); |
852d0037 | 2372 | ret = ustctl_sock_flush_buffer(app->sock, ua_chan->obj); |
8be98f9a | 2373 | if (ret < 0) { |
7db205b5 | 2374 | ERR("UST app PID %d channel %s flush failed with ret %d", |
852d0037 | 2375 | app->pid, ua_chan->name, ret); |
6d3686da DG |
2376 | /* Continuing flushing all buffers */ |
2377 | continue; | |
8be98f9a MD |
2378 | } |
2379 | } | |
8be98f9a | 2380 | |
86acf0da DG |
2381 | health_code_update(&health_thread_cmd); |
2382 | ||
90d97d10 | 2383 | /* Flush all buffers before stopping */ |
852d0037 | 2384 | ret = ustctl_sock_flush_buffer(app->sock, ua_sess->metadata->obj); |
90d97d10 | 2385 | if (ret < 0) { |
852d0037 | 2386 | ERR("UST app PID %d metadata flush failed with ret %d", app->pid, |
7db205b5 | 2387 | ret); |
90d97d10 DG |
2388 | } |
2389 | ||
7db205b5 DG |
2390 | end: |
2391 | rcu_read_unlock(); | |
86acf0da | 2392 | health_code_update(&health_thread_cmd); |
8be98f9a MD |
2393 | return 0; |
2394 | ||
2395 | error_rcu_unlock: | |
2396 | rcu_read_unlock(); | |
86acf0da | 2397 | health_code_update(&health_thread_cmd); |
8be98f9a MD |
2398 | return -1; |
2399 | } | |
2400 | ||
84cd17c6 MD |
2401 | /* |
2402 | * Destroy a specific UST session in apps. | |
2403 | */ | |
2404 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2405 | { | |
2406 | struct ust_app_session *ua_sess; | |
2407 | struct lttng_ust_object_data obj; | |
bec39940 DG |
2408 | struct lttng_ht_iter iter; |
2409 | struct lttng_ht_node_ulong *node; | |
525b0740 | 2410 | int ret; |
84cd17c6 | 2411 | |
852d0037 | 2412 | DBG("Destroy tracing for ust app pid %d", app->pid); |
84cd17c6 MD |
2413 | |
2414 | rcu_read_lock(); | |
2415 | ||
e0c7ec2b DG |
2416 | if (!app->compatible) { |
2417 | goto end; | |
2418 | } | |
2419 | ||
84cd17c6 | 2420 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 2421 | node = lttng_ht_iter_get_node_ulong(&iter); |
84cd17c6 MD |
2422 | if (node == NULL) { |
2423 | /* Only malloc can failed so something is really wrong */ | |
2424 | goto error_rcu_unlock; | |
2425 | } | |
2426 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
bec39940 | 2427 | ret = lttng_ht_del(app->sessions, &iter); |
525b0740 | 2428 | assert(!ret); |
84cd17c6 MD |
2429 | obj.handle = ua_sess->handle; |
2430 | obj.shm_fd = -1; | |
2431 | obj.wait_fd = -1; | |
2432 | obj.memory_map_size = 0; | |
86acf0da | 2433 | health_code_update(&health_thread_cmd); |
852d0037 | 2434 | ustctl_release_object(app->sock, &obj); |
84cd17c6 | 2435 | |
86acf0da | 2436 | health_code_update(&health_thread_cmd); |
852d0037 | 2437 | delete_ust_app_session(app->sock, ua_sess); |
7db205b5 | 2438 | |
84cd17c6 | 2439 | /* Quiescent wait after stopping trace */ |
852d0037 | 2440 | ustctl_wait_quiescent(app->sock); |
84cd17c6 | 2441 | |
e0c7ec2b DG |
2442 | end: |
2443 | rcu_read_unlock(); | |
86acf0da | 2444 | health_code_update(&health_thread_cmd); |
84cd17c6 MD |
2445 | return 0; |
2446 | ||
2447 | error_rcu_unlock: | |
2448 | rcu_read_unlock(); | |
86acf0da | 2449 | health_code_update(&health_thread_cmd); |
84cd17c6 MD |
2450 | return -1; |
2451 | } | |
2452 | ||
5b4a0ec0 DG |
2453 | /* |
2454 | * Start tracing for the UST session. | |
2455 | */ | |
421cb601 DG |
2456 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
2457 | { | |
2458 | int ret = 0; | |
bec39940 | 2459 | struct lttng_ht_iter iter; |
421cb601 | 2460 | struct ust_app *app; |
48842b30 | 2461 | |
421cb601 DG |
2462 | DBG("Starting all UST traces"); |
2463 | ||
2464 | rcu_read_lock(); | |
421cb601 | 2465 | |
852d0037 | 2466 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
421cb601 | 2467 | ret = ust_app_start_trace(usess, app); |
48842b30 | 2468 | if (ret < 0) { |
5b4a0ec0 DG |
2469 | /* Continue to next apps even on error */ |
2470 | continue; | |
48842b30 | 2471 | } |
48842b30 | 2472 | } |
5b4a0ec0 | 2473 | |
48842b30 DG |
2474 | rcu_read_unlock(); |
2475 | ||
2476 | return 0; | |
2477 | } | |
487cf67c | 2478 | |
8be98f9a MD |
2479 | /* |
2480 | * Start tracing for the UST session. | |
2481 | */ | |
2482 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
2483 | { | |
2484 | int ret = 0; | |
bec39940 | 2485 | struct lttng_ht_iter iter; |
8be98f9a MD |
2486 | struct ust_app *app; |
2487 | ||
2488 | DBG("Stopping all UST traces"); | |
2489 | ||
2490 | rcu_read_lock(); | |
2491 | ||
852d0037 | 2492 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
8be98f9a MD |
2493 | ret = ust_app_stop_trace(usess, app); |
2494 | if (ret < 0) { | |
2495 | /* Continue to next apps even on error */ | |
2496 | continue; | |
2497 | } | |
2498 | } | |
2499 | ||
2500 | rcu_read_unlock(); | |
2501 | ||
2502 | return 0; | |
2503 | } | |
2504 | ||
84cd17c6 MD |
2505 | /* |
2506 | * Destroy app UST session. | |
2507 | */ | |
2508 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
2509 | { | |
2510 | int ret = 0; | |
bec39940 | 2511 | struct lttng_ht_iter iter; |
84cd17c6 MD |
2512 | struct ust_app *app; |
2513 | ||
2514 | DBG("Destroy all UST traces"); | |
2515 | ||
2516 | rcu_read_lock(); | |
2517 | ||
852d0037 | 2518 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
84cd17c6 MD |
2519 | ret = ust_app_destroy_trace(usess, app); |
2520 | if (ret < 0) { | |
2521 | /* Continue to next apps even on error */ | |
2522 | continue; | |
2523 | } | |
2524 | } | |
2525 | ||
2526 | rcu_read_unlock(); | |
2527 | ||
2528 | return 0; | |
2529 | } | |
2530 | ||
5b4a0ec0 DG |
2531 | /* |
2532 | * Add channels/events from UST global domain to registered apps at sock. | |
2533 | */ | |
487cf67c DG |
2534 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
2535 | { | |
55c54cce | 2536 | int ret = 0; |
727d5404 | 2537 | struct lttng_ht_iter iter, uiter, iter_ctx; |
487cf67c DG |
2538 | struct ust_app *app; |
2539 | struct ust_app_session *ua_sess; | |
2540 | struct ust_app_channel *ua_chan; | |
2541 | struct ust_app_event *ua_event; | |
727d5404 | 2542 | struct ust_app_ctx *ua_ctx; |
1f3580c7 DG |
2543 | |
2544 | if (usess == NULL) { | |
5b4a0ec0 | 2545 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
2546 | goto error; |
2547 | } | |
2548 | ||
a991f516 MD |
2549 | DBG2("UST app global update for app sock %d for session id %d", sock, |
2550 | usess->id); | |
487cf67c | 2551 | |
284d8f55 DG |
2552 | rcu_read_lock(); |
2553 | ||
487cf67c DG |
2554 | app = find_app_by_sock(sock); |
2555 | if (app == NULL) { | |
2556 | ERR("Failed to update app sock %d", sock); | |
2557 | goto error; | |
2558 | } | |
2559 | ||
e0c7ec2b DG |
2560 | if (!app->compatible) { |
2561 | goto error; | |
2562 | } | |
2563 | ||
421cb601 | 2564 | ua_sess = create_ust_app_session(usess, app); |
5b98a774 DG |
2565 | if (ua_sess == NULL || ua_sess == (void *) -1UL) { |
2566 | /* Tracer is gone for this session and has been freed */ | |
487cf67c DG |
2567 | goto error; |
2568 | } | |
2569 | ||
284d8f55 DG |
2570 | /* |
2571 | * We can iterate safely here over all UST app session sicne the create ust | |
2572 | * app session above made a shadow copy of the UST global domain from the | |
2573 | * ltt ust session. | |
2574 | */ | |
bec39940 DG |
2575 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2576 | node.node) { | |
284d8f55 DG |
2577 | ret = create_ust_channel(app, ua_sess, ua_chan); |
2578 | if (ret < 0) { | |
2579 | /* FIXME: Should we quit here or continue... */ | |
2580 | continue; | |
487cf67c DG |
2581 | } |
2582 | ||
727d5404 DG |
2583 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter_ctx.iter, ua_ctx, |
2584 | node.node) { | |
2585 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
2586 | if (ret < 0) { | |
2587 | /* FIXME: Should we quit here or continue... */ | |
2588 | continue; | |
2589 | } | |
2590 | } | |
2591 | ||
2592 | ||
284d8f55 | 2593 | /* For each events */ |
bec39940 DG |
2594 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
2595 | node.node) { | |
284d8f55 DG |
2596 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
2597 | if (ret < 0) { | |
2598 | /* FIXME: Should we quit here or continue... */ | |
2599 | continue; | |
487cf67c | 2600 | } |
727d5404 DG |
2601 | |
2602 | /* Add context on events. */ | |
2603 | cds_lfht_for_each_entry(ua_event->ctx->ht, &iter_ctx.iter, | |
2604 | ua_ctx, node.node) { | |
2605 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
2606 | if (ret < 0) { | |
2607 | /* FIXME: Should we quit here or continue... */ | |
2608 | continue; | |
2609 | } | |
2610 | } | |
53a80697 MD |
2611 | ret = set_ust_event_filter(ua_event, app); |
2612 | if (ret < 0) { | |
2613 | /* FIXME: Should we quit here or continue... */ | |
2614 | continue; | |
2615 | } | |
36dc12cc | 2616 | } |
487cf67c DG |
2617 | } |
2618 | ||
36dc12cc | 2619 | if (usess->start_trace) { |
421cb601 | 2620 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 2621 | if (ret < 0) { |
36dc12cc DG |
2622 | goto error; |
2623 | } | |
2624 | ||
852d0037 | 2625 | DBG2("UST trace started for app pid %d", app->pid); |
36dc12cc DG |
2626 | } |
2627 | ||
487cf67c DG |
2628 | error: |
2629 | rcu_read_unlock(); | |
2630 | return; | |
2631 | } | |
55cc08a6 DG |
2632 | |
2633 | /* | |
2634 | * Add context to a specific channel for global UST domain. | |
2635 | */ | |
2636 | int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess, | |
2637 | struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx) | |
2638 | { | |
2639 | int ret = 0; | |
bec39940 DG |
2640 | struct lttng_ht_node_str *ua_chan_node; |
2641 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2642 | struct ust_app_channel *ua_chan = NULL; |
2643 | struct ust_app_session *ua_sess; | |
2644 | struct ust_app *app; | |
2645 | ||
2646 | rcu_read_lock(); | |
2647 | ||
852d0037 | 2648 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2649 | if (!app->compatible) { |
2650 | /* | |
2651 | * TODO: In time, we should notice the caller of this error by | |
2652 | * telling him that this is a version error. | |
2653 | */ | |
2654 | continue; | |
2655 | } | |
55cc08a6 DG |
2656 | ua_sess = lookup_session_by_app(usess, app); |
2657 | if (ua_sess == NULL) { | |
2658 | continue; | |
2659 | } | |
2660 | ||
2661 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2662 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2663 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2664 | if (ua_chan_node == NULL) { |
2665 | continue; | |
2666 | } | |
2667 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2668 | node); | |
2669 | ||
2670 | ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app); | |
2671 | if (ret < 0) { | |
2672 | continue; | |
2673 | } | |
2674 | } | |
2675 | ||
55cc08a6 DG |
2676 | rcu_read_unlock(); |
2677 | return ret; | |
2678 | } | |
2679 | ||
2680 | /* | |
2681 | * Add context to a specific event in a channel for global UST domain. | |
2682 | */ | |
2683 | int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess, | |
2684 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
2685 | struct ltt_ust_context *uctx) | |
2686 | { | |
2687 | int ret = 0; | |
bec39940 DG |
2688 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; |
2689 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2690 | struct ust_app_session *ua_sess; |
2691 | struct ust_app_event *ua_event; | |
2692 | struct ust_app_channel *ua_chan = NULL; | |
2693 | struct ust_app *app; | |
2694 | ||
2695 | rcu_read_lock(); | |
2696 | ||
852d0037 | 2697 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2698 | if (!app->compatible) { |
2699 | /* | |
2700 | * TODO: In time, we should notice the caller of this error by | |
2701 | * telling him that this is a version error. | |
2702 | */ | |
2703 | continue; | |
2704 | } | |
55cc08a6 DG |
2705 | ua_sess = lookup_session_by_app(usess, app); |
2706 | if (ua_sess == NULL) { | |
2707 | continue; | |
2708 | } | |
2709 | ||
2710 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2711 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2712 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2713 | if (ua_chan_node == NULL) { |
2714 | continue; | |
2715 | } | |
2716 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2717 | node); | |
2718 | ||
bec39940 DG |
2719 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
2720 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2721 | if (ua_event_node == NULL) { |
2722 | continue; | |
2723 | } | |
2724 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, | |
2725 | node); | |
2726 | ||
2727 | ret = create_ust_app_event_context(ua_sess, ua_event, &uctx->ctx, app); | |
2728 | if (ret < 0) { | |
2729 | continue; | |
2730 | } | |
2731 | } | |
2732 | ||
55cc08a6 DG |
2733 | rcu_read_unlock(); |
2734 | return ret; | |
2735 | } | |
76d45b40 | 2736 | |
53a80697 MD |
2737 | /* |
2738 | * Add context to a specific event in a channel for global UST domain. | |
2739 | */ | |
2740 | int ust_app_set_filter_event_glb(struct ltt_ust_session *usess, | |
2741 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
2742 | struct lttng_filter_bytecode *bytecode) | |
2743 | { | |
2744 | int ret = 0; | |
2745 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
2746 | struct lttng_ht_iter iter, uiter; | |
2747 | struct ust_app_session *ua_sess; | |
2748 | struct ust_app_event *ua_event; | |
2749 | struct ust_app_channel *ua_chan = NULL; | |
2750 | struct ust_app *app; | |
2751 | ||
2752 | rcu_read_lock(); | |
2753 | ||
2754 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { | |
2755 | if (!app->compatible) { | |
2756 | /* | |
2757 | * TODO: In time, we should notice the caller of this error by | |
2758 | * telling him that this is a version error. | |
2759 | */ | |
2760 | continue; | |
2761 | } | |
2762 | ua_sess = lookup_session_by_app(usess, app); | |
2763 | if (ua_sess == NULL) { | |
2764 | continue; | |
2765 | } | |
2766 | ||
2767 | /* Lookup channel in the ust app session */ | |
2768 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); | |
2769 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
2770 | if (ua_chan_node == NULL) { | |
2771 | continue; | |
2772 | } | |
2773 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2774 | node); | |
2775 | ||
2776 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); | |
2777 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
2778 | if (ua_event_node == NULL) { | |
2779 | continue; | |
2780 | } | |
2781 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, | |
2782 | node); | |
2783 | ||
2784 | ret = set_ust_app_event_filter(ua_sess, ua_event, bytecode, app); | |
2785 | if (ret < 0) { | |
2786 | continue; | |
2787 | } | |
2788 | } | |
2789 | ||
2790 | rcu_read_unlock(); | |
2791 | return ret; | |
2792 | } | |
2793 | ||
76d45b40 DG |
2794 | /* |
2795 | * Enable event for a channel from a UST session for a specific PID. | |
2796 | */ | |
2797 | int ust_app_enable_event_pid(struct ltt_ust_session *usess, | |
2798 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2799 | { | |
2800 | int ret = 0; | |
bec39940 DG |
2801 | struct lttng_ht_iter iter; |
2802 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
76d45b40 DG |
2803 | struct ust_app *app; |
2804 | struct ust_app_session *ua_sess; | |
2805 | struct ust_app_channel *ua_chan; | |
2806 | struct ust_app_event *ua_event; | |
2807 | ||
2808 | DBG("UST app enabling event %s for PID %d", uevent->attr.name, pid); | |
2809 | ||
2810 | rcu_read_lock(); | |
2811 | ||
2812 | app = ust_app_find_by_pid(pid); | |
2813 | if (app == NULL) { | |
2814 | ERR("UST app enable event per PID %d not found", pid); | |
2815 | ret = -1; | |
2816 | goto error; | |
2817 | } | |
2818 | ||
e0c7ec2b DG |
2819 | if (!app->compatible) { |
2820 | ret = 0; | |
2821 | goto error; | |
2822 | } | |
2823 | ||
76d45b40 DG |
2824 | ua_sess = lookup_session_by_app(usess, app); |
2825 | /* If ua_sess is NULL, there is a code flow error */ | |
2826 | assert(ua_sess); | |
2827 | ||
2828 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2829 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2830 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2831 | /* If the channel is not found, there is a code flow error */ |
2832 | assert(ua_chan_node); | |
2833 | ||
2834 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2835 | ||
bec39940 DG |
2836 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2837 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2838 | if (ua_event_node == NULL) { |
2839 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); | |
2840 | if (ret < 0) { | |
2841 | goto error; | |
2842 | } | |
2843 | } else { | |
2844 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2845 | ||
2846 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2847 | if (ret < 0) { | |
2848 | goto error; | |
2849 | } | |
2850 | } | |
2851 | ||
2852 | error: | |
2853 | rcu_read_unlock(); | |
2854 | return ret; | |
2855 | } | |
7f79d3a1 DG |
2856 | |
2857 | /* | |
2858 | * Disable event for a channel from a UST session for a specific PID. | |
2859 | */ | |
2860 | int ust_app_disable_event_pid(struct ltt_ust_session *usess, | |
2861 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2862 | { | |
2863 | int ret = 0; | |
bec39940 DG |
2864 | struct lttng_ht_iter iter; |
2865 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
7f79d3a1 DG |
2866 | struct ust_app *app; |
2867 | struct ust_app_session *ua_sess; | |
2868 | struct ust_app_channel *ua_chan; | |
2869 | struct ust_app_event *ua_event; | |
2870 | ||
2871 | DBG("UST app disabling event %s for PID %d", uevent->attr.name, pid); | |
2872 | ||
2873 | rcu_read_lock(); | |
2874 | ||
2875 | app = ust_app_find_by_pid(pid); | |
2876 | if (app == NULL) { | |
2877 | ERR("UST app disable event per PID %d not found", pid); | |
2878 | ret = -1; | |
2879 | goto error; | |
2880 | } | |
2881 | ||
e0c7ec2b DG |
2882 | if (!app->compatible) { |
2883 | ret = 0; | |
2884 | goto error; | |
2885 | } | |
2886 | ||
7f79d3a1 DG |
2887 | ua_sess = lookup_session_by_app(usess, app); |
2888 | /* If ua_sess is NULL, there is a code flow error */ | |
2889 | assert(ua_sess); | |
2890 | ||
2891 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2892 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2893 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2894 | if (ua_chan_node == NULL) { |
2895 | /* Channel does not exist, skip disabling */ | |
2896 | goto error; | |
2897 | } | |
2898 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2899 | ||
bec39940 DG |
2900 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2901 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2902 | if (ua_event_node == NULL) { |
2903 | /* Event does not exist, skip disabling */ | |
2904 | goto error; | |
2905 | } | |
2906 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2907 | ||
2908 | ret = disable_ust_app_event(ua_sess, ua_event, app); | |
2909 | if (ret < 0) { | |
2910 | goto error; | |
2911 | } | |
2912 | ||
2913 | error: | |
2914 | rcu_read_unlock(); | |
2915 | return ret; | |
2916 | } | |
e0c7ec2b DG |
2917 | |
2918 | /* | |
2919 | * Validate version of UST apps and set the compatible bit. | |
2920 | */ | |
2921 | int ust_app_validate_version(int sock) | |
2922 | { | |
2923 | int ret; | |
2924 | struct ust_app *app; | |
2925 | ||
2926 | rcu_read_lock(); | |
2927 | ||
2928 | app = find_app_by_sock(sock); | |
2929 | assert(app); | |
2930 | ||
86acf0da DG |
2931 | health_code_update(&health_thread_cmd); |
2932 | ||
e0c7ec2b DG |
2933 | ret = ustctl_tracer_version(sock, &app->version); |
2934 | if (ret < 0) { | |
2935 | goto error; | |
2936 | } | |
2937 | ||
2938 | /* Validate version */ | |
aee0cea0 | 2939 | if (app->version.major != UST_APP_MAJOR_VERSION) { |
e0c7ec2b DG |
2940 | goto error; |
2941 | } | |
2942 | ||
68264071 | 2943 | DBG2("UST app PID %d is compatible with internal major version %d " |
aee0cea0 | 2944 | "(supporting == %d)", app->pid, app->version.major, |
e0c7ec2b DG |
2945 | UST_APP_MAJOR_VERSION); |
2946 | app->compatible = 1; | |
2947 | rcu_read_unlock(); | |
86acf0da | 2948 | health_code_update(&health_thread_cmd); |
e0c7ec2b DG |
2949 | return 0; |
2950 | ||
2951 | error: | |
68264071 | 2952 | DBG2("UST app PID %d is not compatible with internal major version %d " |
aee0cea0 | 2953 | "(supporting == %d)", app->pid, app->version.major, |
e0c7ec2b DG |
2954 | UST_APP_MAJOR_VERSION); |
2955 | app->compatible = 0; | |
2956 | rcu_read_unlock(); | |
86acf0da | 2957 | health_code_update(&health_thread_cmd); |
e0c7ec2b DG |
2958 | return -1; |
2959 | } | |
4466912f DG |
2960 | |
2961 | /* | |
2962 | * Calibrate registered applications. | |
2963 | */ | |
2964 | int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate) | |
2965 | { | |
2966 | int ret = 0; | |
2967 | struct lttng_ht_iter iter; | |
2968 | struct ust_app *app; | |
2969 | ||
2970 | rcu_read_lock(); | |
2971 | ||
852d0037 | 2972 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
4466912f DG |
2973 | if (!app->compatible) { |
2974 | /* | |
2975 | * TODO: In time, we should notice the caller of this error by | |
2976 | * telling him that this is a version error. | |
2977 | */ | |
2978 | continue; | |
2979 | } | |
2980 | ||
86acf0da DG |
2981 | health_code_update(&health_thread_cmd); |
2982 | ||
852d0037 | 2983 | ret = ustctl_calibrate(app->sock, calibrate); |
4466912f DG |
2984 | if (ret < 0) { |
2985 | switch (ret) { | |
2986 | case -ENOSYS: | |
2987 | /* Means that it's not implemented on the tracer side. */ | |
2988 | ret = 0; | |
2989 | break; | |
2990 | default: | |
2991 | /* TODO: Report error to user */ | |
2992 | DBG2("Calibrate app PID %d returned with error %d", | |
852d0037 | 2993 | app->pid, ret); |
4466912f DG |
2994 | break; |
2995 | } | |
2996 | } | |
2997 | } | |
2998 | ||
2999 | DBG("UST app global domain calibration finished"); | |
3000 | ||
3001 | rcu_read_unlock(); | |
3002 | ||
86acf0da DG |
3003 | health_code_update(&health_thread_cmd); |
3004 | ||
4466912f DG |
3005 | return ret; |
3006 | } |