Commit | Line | Data |
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91d76f53 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
82a3637f DG |
6 | * as published by the Free Software Foundation; only version 2 |
7 | * of the License. | |
91d76f53 DG |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <errno.h> | |
21 | #include <pthread.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
099e26bd | 24 | #include <string.h> |
aba8e916 DG |
25 | #include <sys/stat.h> |
26 | #include <sys/types.h> | |
099e26bd | 27 | #include <unistd.h> |
0df502fd | 28 | #include <urcu/compiler.h> |
bec39940 | 29 | |
10a8a223 | 30 | #include <common/lttngerr.h> |
990570ed | 31 | #include <common/common.h> |
1e307fab | 32 | |
56fff090 | 33 | #include "ust-app.h" |
48842b30 | 34 | #include "ust-consumer.h" |
d80a6244 DG |
35 | #include "ust-ctl.h" |
36 | ||
55cc08a6 DG |
37 | /* |
38 | * Delete ust context safely. RCU read lock must be held before calling | |
39 | * this function. | |
40 | */ | |
41 | static | |
42 | void delete_ust_app_ctx(int sock, struct ust_app_ctx *ua_ctx) | |
43 | { | |
44 | if (ua_ctx->obj) { | |
45 | ustctl_release_object(sock, ua_ctx->obj); | |
46 | free(ua_ctx->obj); | |
47 | } | |
48 | free(ua_ctx); | |
49 | } | |
50 | ||
d80a6244 DG |
51 | /* |
52 | * Delete ust app event safely. RCU read lock must be held before calling | |
53 | * this function. | |
54 | */ | |
8b366481 DG |
55 | static |
56 | void delete_ust_app_event(int sock, struct ust_app_event *ua_event) | |
d80a6244 | 57 | { |
55cc08a6 | 58 | int ret; |
bec39940 | 59 | struct lttng_ht_iter iter; |
55cc08a6 DG |
60 | struct ust_app_ctx *ua_ctx; |
61 | ||
fc34caaa | 62 | /* Destroy each context of event */ |
bec39940 DG |
63 | cds_lfht_for_each_entry(ua_event->ctx->ht, &iter.iter, ua_ctx, |
64 | node.node) { | |
65 | ret = lttng_ht_del(ua_event->ctx, &iter); | |
55cc08a6 DG |
66 | assert(!ret); |
67 | delete_ust_app_ctx(sock, ua_ctx); | |
68 | } | |
bec39940 | 69 | lttng_ht_destroy(ua_event->ctx); |
d80a6244 | 70 | |
edb67388 DG |
71 | if (ua_event->obj != NULL) { |
72 | ustctl_release_object(sock, ua_event->obj); | |
73 | free(ua_event->obj); | |
74 | } | |
d80a6244 DG |
75 | free(ua_event); |
76 | } | |
77 | ||
78 | /* | |
79 | * Delete ust app stream safely. RCU read lock must be held before calling | |
80 | * this function. | |
81 | */ | |
8b366481 DG |
82 | static |
83 | void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream) | |
d80a6244 | 84 | { |
8b366481 DG |
85 | if (stream->obj) { |
86 | ustctl_release_object(sock, stream->obj); | |
87 | free(stream->obj); | |
88 | } | |
84cd17c6 | 89 | free(stream); |
d80a6244 DG |
90 | } |
91 | ||
92 | /* | |
93 | * Delete ust app channel safely. RCU read lock must be held before calling | |
94 | * this function. | |
95 | */ | |
8b366481 DG |
96 | static |
97 | void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan) | |
d80a6244 DG |
98 | { |
99 | int ret; | |
bec39940 | 100 | struct lttng_ht_iter iter; |
d80a6244 | 101 | struct ust_app_event *ua_event; |
55cc08a6 | 102 | struct ust_app_ctx *ua_ctx; |
d80a6244 DG |
103 | struct ltt_ust_stream *stream, *stmp; |
104 | ||
55cc08a6 | 105 | /* Wipe stream */ |
d80a6244 | 106 | cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) { |
84cd17c6 | 107 | cds_list_del(&stream->list); |
d80a6244 DG |
108 | delete_ust_app_stream(sock, stream); |
109 | } | |
110 | ||
55cc08a6 | 111 | /* Wipe context */ |
bec39940 DG |
112 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter.iter, ua_ctx, node.node) { |
113 | ret = lttng_ht_del(ua_chan->ctx, &iter); | |
55cc08a6 DG |
114 | assert(!ret); |
115 | delete_ust_app_ctx(sock, ua_ctx); | |
116 | } | |
bec39940 | 117 | lttng_ht_destroy(ua_chan->ctx); |
d80a6244 | 118 | |
55cc08a6 | 119 | /* Wipe events */ |
bec39940 DG |
120 | cds_lfht_for_each_entry(ua_chan->events->ht, &iter.iter, ua_event, |
121 | node.node) { | |
122 | ret = lttng_ht_del(ua_chan->events, &iter); | |
525b0740 | 123 | assert(!ret); |
d80a6244 DG |
124 | delete_ust_app_event(sock, ua_event); |
125 | } | |
bec39940 | 126 | lttng_ht_destroy(ua_chan->events); |
edb67388 DG |
127 | |
128 | if (ua_chan->obj != NULL) { | |
129 | ustctl_release_object(sock, ua_chan->obj); | |
130 | free(ua_chan->obj); | |
131 | } | |
84cd17c6 | 132 | free(ua_chan); |
d80a6244 DG |
133 | } |
134 | ||
135 | /* | |
136 | * Delete ust app session safely. RCU read lock must be held before calling | |
137 | * this function. | |
138 | */ | |
8b366481 DG |
139 | static |
140 | void delete_ust_app_session(int sock, struct ust_app_session *ua_sess) | |
d80a6244 DG |
141 | { |
142 | int ret; | |
bec39940 | 143 | struct lttng_ht_iter iter; |
d80a6244 DG |
144 | struct ust_app_channel *ua_chan; |
145 | ||
146 | if (ua_sess->metadata) { | |
8b366481 DG |
147 | if (ua_sess->metadata->stream_obj) { |
148 | ustctl_release_object(sock, ua_sess->metadata->stream_obj); | |
149 | free(ua_sess->metadata->stream_obj); | |
150 | } | |
151 | if (ua_sess->metadata->obj) { | |
152 | ustctl_release_object(sock, ua_sess->metadata->obj); | |
153 | free(ua_sess->metadata->obj); | |
154 | } | |
d80a6244 DG |
155 | } |
156 | ||
bec39940 DG |
157 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
158 | node.node) { | |
159 | ret = lttng_ht_del(ua_sess->channels, &iter); | |
525b0740 | 160 | assert(!ret); |
d80a6244 DG |
161 | delete_ust_app_channel(sock, ua_chan); |
162 | } | |
bec39940 | 163 | lttng_ht_destroy(ua_sess->channels); |
d80a6244 | 164 | |
aee6bafd MD |
165 | if (ua_sess->handle != -1) { |
166 | ustctl_release_handle(sock, ua_sess->handle); | |
167 | } | |
8b366481 | 168 | free(ua_sess); |
d80a6244 | 169 | } |
91d76f53 DG |
170 | |
171 | /* | |
284d8f55 DG |
172 | * Delete a traceable application structure from the global list. Never call |
173 | * this function outside of a call_rcu call. | |
91d76f53 | 174 | */ |
8b366481 DG |
175 | static |
176 | void delete_ust_app(struct ust_app *app) | |
91d76f53 | 177 | { |
8b366481 | 178 | int ret, sock; |
bec39940 | 179 | struct lttng_ht_iter iter; |
284d8f55 | 180 | struct ust_app_session *ua_sess; |
44d3bd01 | 181 | |
f6a9efaa | 182 | rcu_read_lock(); |
44d3bd01 | 183 | |
d80a6244 | 184 | /* Delete ust app sessions info */ |
6414a713 MD |
185 | sock = app->key.sock; |
186 | app->key.sock = -1; | |
d80a6244 | 187 | |
8b366481 | 188 | /* Wipe sessions */ |
bec39940 DG |
189 | cds_lfht_for_each_entry(app->sessions->ht, &iter.iter, ua_sess, |
190 | node.node) { | |
191 | ret = lttng_ht_del(app->sessions, &iter); | |
525b0740 | 192 | assert(!ret); |
284d8f55 | 193 | delete_ust_app_session(app->key.sock, ua_sess); |
d80a6244 | 194 | } |
bec39940 | 195 | lttng_ht_destroy(app->sessions); |
d80a6244 | 196 | |
6414a713 | 197 | /* |
bec39940 DG |
198 | * Wait until we have removed the key from the sock hash table before |
199 | * closing this socket, otherwise an application could re-use the socket ID | |
200 | * and race with the teardown, using the same hash table entry. | |
6414a713 MD |
201 | */ |
202 | close(sock); | |
d80a6244 | 203 | |
284d8f55 DG |
204 | DBG2("UST app pid %d deleted", app->key.pid); |
205 | free(app); | |
bec39940 | 206 | |
f6a9efaa | 207 | rcu_read_unlock(); |
099e26bd DG |
208 | } |
209 | ||
210 | /* | |
f6a9efaa | 211 | * URCU intermediate call to delete an UST app. |
099e26bd | 212 | */ |
8b366481 DG |
213 | static |
214 | void delete_ust_app_rcu(struct rcu_head *head) | |
099e26bd | 215 | { |
bec39940 DG |
216 | struct lttng_ht_node_ulong *node = |
217 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
218 | struct ust_app *app = |
219 | caa_container_of(node, struct ust_app, node); | |
220 | ||
bec39940 | 221 | DBG3("Call RCU deleting app PID %d", app->key.pid); |
f6a9efaa | 222 | delete_ust_app(app); |
099e26bd DG |
223 | } |
224 | ||
8b366481 DG |
225 | /* |
226 | * Alloc new UST app session. | |
227 | */ | |
228 | static | |
229 | struct ust_app_session *alloc_ust_app_session(void) | |
230 | { | |
231 | struct ust_app_session *ua_sess; | |
232 | ||
233 | /* Init most of the default value by allocating and zeroing */ | |
234 | ua_sess = zmalloc(sizeof(struct ust_app_session)); | |
235 | if (ua_sess == NULL) { | |
236 | PERROR("malloc"); | |
237 | goto error; | |
238 | } | |
239 | ||
240 | ua_sess->handle = -1; | |
bec39940 | 241 | ua_sess->channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
8b366481 DG |
242 | |
243 | return ua_sess; | |
244 | ||
245 | error: | |
246 | return NULL; | |
247 | } | |
248 | ||
249 | /* | |
250 | * Alloc new UST app channel. | |
251 | */ | |
252 | static | |
253 | struct ust_app_channel *alloc_ust_app_channel(char *name, | |
254 | struct lttng_ust_channel *attr) | |
255 | { | |
256 | struct ust_app_channel *ua_chan; | |
257 | ||
258 | /* Init most of the default value by allocating and zeroing */ | |
259 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); | |
260 | if (ua_chan == NULL) { | |
261 | PERROR("malloc"); | |
262 | goto error; | |
263 | } | |
264 | ||
265 | /* Setup channel name */ | |
266 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
267 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
268 | ||
269 | ua_chan->enabled = 1; | |
270 | ua_chan->handle = -1; | |
bec39940 DG |
271 | ua_chan->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
272 | ua_chan->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); | |
273 | lttng_ht_node_init_str(&ua_chan->node, ua_chan->name); | |
8b366481 DG |
274 | |
275 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); | |
276 | ||
277 | /* Copy attributes */ | |
278 | if (attr) { | |
279 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
280 | } | |
281 | ||
282 | DBG3("UST app channel %s allocated", ua_chan->name); | |
283 | ||
284 | return ua_chan; | |
285 | ||
286 | error: | |
287 | return NULL; | |
288 | } | |
289 | ||
290 | /* | |
291 | * Alloc new UST app event. | |
292 | */ | |
293 | static | |
294 | struct ust_app_event *alloc_ust_app_event(char *name, | |
295 | struct lttng_ust_event *attr) | |
296 | { | |
297 | struct ust_app_event *ua_event; | |
298 | ||
299 | /* Init most of the default value by allocating and zeroing */ | |
300 | ua_event = zmalloc(sizeof(struct ust_app_event)); | |
301 | if (ua_event == NULL) { | |
302 | PERROR("malloc"); | |
303 | goto error; | |
304 | } | |
305 | ||
306 | ua_event->enabled = 1; | |
307 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
308 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
bec39940 DG |
309 | ua_event->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
310 | lttng_ht_node_init_str(&ua_event->node, ua_event->name); | |
8b366481 DG |
311 | |
312 | /* Copy attributes */ | |
313 | if (attr) { | |
314 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
315 | } | |
316 | ||
317 | DBG3("UST app event %s allocated", ua_event->name); | |
318 | ||
319 | return ua_event; | |
320 | ||
321 | error: | |
322 | return NULL; | |
323 | } | |
324 | ||
325 | /* | |
326 | * Alloc new UST app context. | |
327 | */ | |
328 | static | |
329 | struct ust_app_ctx *alloc_ust_app_ctx(struct lttng_ust_context *uctx) | |
330 | { | |
331 | struct ust_app_ctx *ua_ctx; | |
332 | ||
333 | ua_ctx = zmalloc(sizeof(struct ust_app_ctx)); | |
334 | if (ua_ctx == NULL) { | |
335 | goto error; | |
336 | } | |
337 | ||
338 | if (uctx) { | |
339 | memcpy(&ua_ctx->ctx, uctx, sizeof(ua_ctx->ctx)); | |
340 | } | |
341 | ||
342 | DBG3("UST app context %d allocated", ua_ctx->ctx.ctx); | |
343 | ||
344 | error: | |
345 | return ua_ctx; | |
346 | } | |
347 | ||
099e26bd | 348 | /* |
421cb601 DG |
349 | * Find an ust_app using the sock and return it. RCU read side lock must be |
350 | * held before calling this helper function. | |
099e26bd | 351 | */ |
8b366481 DG |
352 | static |
353 | struct ust_app *find_app_by_sock(int sock) | |
099e26bd | 354 | { |
bec39940 | 355 | struct lttng_ht_node_ulong *node; |
f6a9efaa | 356 | struct ust_app_key *key; |
bec39940 | 357 | struct lttng_ht_iter iter; |
f6a9efaa | 358 | |
bec39940 DG |
359 | lttng_ht_lookup(ust_app_sock_key_map, (void *)((unsigned long) sock), |
360 | &iter); | |
361 | node = lttng_ht_iter_get_node_ulong(&iter); | |
f6a9efaa DG |
362 | if (node == NULL) { |
363 | DBG2("UST app find by sock %d key not found", sock); | |
f6a9efaa DG |
364 | goto error; |
365 | } | |
f6a9efaa DG |
366 | key = caa_container_of(node, struct ust_app_key, node); |
367 | ||
bec39940 DG |
368 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) key->pid), &iter); |
369 | node = lttng_ht_iter_get_node_ulong(&iter); | |
f6a9efaa DG |
370 | if (node == NULL) { |
371 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
372 | goto error; |
373 | } | |
f6a9efaa DG |
374 | return caa_container_of(node, struct ust_app, node); |
375 | ||
376 | error: | |
377 | return NULL; | |
099e26bd DG |
378 | } |
379 | ||
55cc08a6 DG |
380 | /* |
381 | * Create the channel context on the tracer. | |
382 | */ | |
383 | static | |
384 | int create_ust_channel_context(struct ust_app_channel *ua_chan, | |
385 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
386 | { | |
387 | int ret; | |
388 | ||
389 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
390 | ua_chan->obj, &ua_ctx->obj); | |
391 | if (ret < 0) { | |
392 | goto error; | |
393 | } | |
394 | ||
395 | ua_ctx->handle = ua_ctx->obj->handle; | |
396 | ||
397 | DBG2("UST app context added to channel %s successfully", ua_chan->name); | |
398 | ||
399 | error: | |
400 | return ret; | |
401 | } | |
402 | ||
403 | /* | |
404 | * Create the event context on the tracer. | |
405 | */ | |
406 | static | |
407 | int create_ust_event_context(struct ust_app_event *ua_event, | |
408 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
409 | { | |
410 | int ret; | |
411 | ||
412 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
413 | ua_event->obj, &ua_ctx->obj); | |
414 | if (ret < 0) { | |
415 | goto error; | |
416 | } | |
417 | ||
418 | ua_ctx->handle = ua_ctx->obj->handle; | |
419 | ||
420 | DBG2("UST app context added to event %s successfully", ua_event->name); | |
421 | ||
422 | error: | |
423 | return ret; | |
424 | } | |
425 | ||
9730260e DG |
426 | /* |
427 | * Disable the specified event on to UST tracer for the UST session. | |
428 | */ | |
429 | static int disable_ust_event(struct ust_app *app, | |
430 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
431 | { | |
432 | int ret; | |
433 | ||
434 | ret = ustctl_disable(app->key.sock, ua_event->obj); | |
435 | if (ret < 0) { | |
436 | ERR("UST app event %s disable failed for app (pid: %d) " | |
437 | "and session handle %d with ret %d", | |
438 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
439 | goto error; | |
440 | } | |
441 | ||
442 | DBG2("UST app event %s disabled successfully for app (pid: %d)", | |
443 | ua_event->attr.name, app->key.pid); | |
444 | ||
445 | error: | |
446 | return ret; | |
447 | } | |
448 | ||
78f0bacd DG |
449 | /* |
450 | * Disable the specified channel on to UST tracer for the UST session. | |
451 | */ | |
452 | static int disable_ust_channel(struct ust_app *app, | |
453 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
454 | { | |
455 | int ret; | |
456 | ||
457 | ret = ustctl_disable(app->key.sock, ua_chan->obj); | |
458 | if (ret < 0) { | |
459 | ERR("UST app channel %s disable failed for app (pid: %d) " | |
460 | "and session handle %d with ret %d", | |
461 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
462 | goto error; | |
463 | } | |
464 | ||
78f0bacd DG |
465 | DBG2("UST app channel %s disabled successfully for app (pid: %d)", |
466 | ua_chan->name, app->key.pid); | |
467 | ||
468 | error: | |
469 | return ret; | |
470 | } | |
471 | ||
472 | /* | |
473 | * Enable the specified channel on to UST tracer for the UST session. | |
474 | */ | |
475 | static int enable_ust_channel(struct ust_app *app, | |
476 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
477 | { | |
478 | int ret; | |
479 | ||
480 | ret = ustctl_enable(app->key.sock, ua_chan->obj); | |
481 | if (ret < 0) { | |
482 | ERR("UST app channel %s enable failed for app (pid: %d) " | |
483 | "and session handle %d with ret %d", | |
484 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
485 | goto error; | |
486 | } | |
487 | ||
488 | ua_chan->enabled = 1; | |
489 | ||
490 | DBG2("UST app channel %s enabled successfully for app (pid: %d)", | |
491 | ua_chan->name, app->key.pid); | |
492 | ||
493 | error: | |
494 | return ret; | |
495 | } | |
496 | ||
edb67388 DG |
497 | /* |
498 | * Enable the specified event on to UST tracer for the UST session. | |
499 | */ | |
500 | static int enable_ust_event(struct ust_app *app, | |
501 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
502 | { | |
503 | int ret; | |
504 | ||
505 | ret = ustctl_enable(app->key.sock, ua_event->obj); | |
506 | if (ret < 0) { | |
507 | ERR("UST app event %s enable failed for app (pid: %d) " | |
508 | "and session handle %d with ret %d", | |
509 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
510 | goto error; | |
511 | } | |
512 | ||
513 | DBG2("UST app event %s enabled successfully for app (pid: %d)", | |
514 | ua_event->attr.name, app->key.pid); | |
515 | ||
516 | error: | |
517 | return ret; | |
518 | } | |
519 | ||
099e26bd | 520 | /* |
5b4a0ec0 | 521 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 522 | */ |
5b4a0ec0 DG |
523 | static int open_ust_metadata(struct ust_app *app, |
524 | struct ust_app_session *ua_sess) | |
0177d773 | 525 | { |
5b4a0ec0 DG |
526 | int ret; |
527 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 528 | |
5b4a0ec0 DG |
529 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
530 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
531 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
532 | uattr.switch_timer_interval = | |
533 | ua_sess->metadata->attr.switch_timer_interval; | |
534 | uattr.read_timer_interval = | |
535 | ua_sess->metadata->attr.read_timer_interval; | |
536 | uattr.output = ua_sess->metadata->attr.output; | |
537 | ||
538 | /* UST tracer metadata creation */ | |
539 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
540 | &ua_sess->metadata->obj); | |
541 | if (ret < 0) { | |
fc34caaa DG |
542 | ERR("UST app open metadata failed for app pid:%d with ret %d", |
543 | app->key.pid, ret); | |
f6a9efaa | 544 | goto error; |
0177d773 | 545 | } |
f6a9efaa | 546 | |
6d3686da DG |
547 | ua_sess->metadata->handle = ua_sess->metadata->obj->handle; |
548 | ||
f6a9efaa | 549 | error: |
5b4a0ec0 | 550 | return ret; |
91d76f53 DG |
551 | } |
552 | ||
553 | /* | |
5b4a0ec0 | 554 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 555 | */ |
5b4a0ec0 DG |
556 | static int create_ust_stream(struct ust_app *app, |
557 | struct ust_app_session *ua_sess) | |
91d76f53 | 558 | { |
5b4a0ec0 | 559 | int ret; |
421cb601 | 560 | |
5b4a0ec0 DG |
561 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, |
562 | &ua_sess->metadata->stream_obj); | |
563 | if (ret < 0) { | |
564 | ERR("UST create metadata stream failed"); | |
421cb601 | 565 | goto error; |
91d76f53 | 566 | } |
421cb601 | 567 | |
421cb601 | 568 | error: |
5b4a0ec0 | 569 | return ret; |
91d76f53 DG |
570 | } |
571 | ||
b551a063 | 572 | /* |
5b4a0ec0 | 573 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 574 | */ |
5b4a0ec0 DG |
575 | static int create_ust_channel(struct ust_app *app, |
576 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 577 | { |
5b4a0ec0 | 578 | int ret; |
b551a063 | 579 | |
5b4a0ec0 DG |
580 | /* TODO: remove cast and use lttng-ust-abi.h */ |
581 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
582 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); | |
583 | if (ret < 0) { | |
58f3ca76 | 584 | ERR("Creating channel %s for app (pid: %d, sock: %d) " |
5b4a0ec0 DG |
585 | "and session handle %d with ret %d", |
586 | ua_chan->name, app->key.pid, app->key.sock, | |
587 | ua_sess->handle, ret); | |
b551a063 DG |
588 | goto error; |
589 | } | |
590 | ||
5b4a0ec0 | 591 | ua_chan->handle = ua_chan->obj->handle; |
b551a063 | 592 | |
5b4a0ec0 DG |
593 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
594 | ua_chan->name, app->key.pid, app->key.sock); | |
b551a063 | 595 | |
8535a6d9 DG |
596 | /* If channel is not enabled, disable it on the tracer */ |
597 | if (!ua_chan->enabled) { | |
598 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
599 | if (ret < 0) { | |
600 | goto error; | |
601 | } | |
602 | } | |
603 | ||
b551a063 DG |
604 | error: |
605 | return ret; | |
606 | } | |
607 | ||
91d76f53 | 608 | /* |
5b4a0ec0 | 609 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 610 | */ |
edb67388 DG |
611 | static |
612 | int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess, | |
613 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event) | |
91d76f53 | 614 | { |
5b4a0ec0 | 615 | int ret = 0; |
284d8f55 | 616 | |
5b4a0ec0 DG |
617 | /* Create UST event on tracer */ |
618 | ret = ustctl_create_event(app->key.sock, &ua_event->attr, ua_chan->obj, | |
619 | &ua_event->obj); | |
620 | if (ret < 0) { | |
fc34caaa DG |
621 | if (ret == -EEXIST) { |
622 | ret = 0; | |
623 | goto error; | |
624 | } | |
5b4a0ec0 DG |
625 | ERR("Error ustctl create event %s for app pid: %d with ret %d", |
626 | ua_event->attr.name, app->key.pid, ret); | |
627 | goto error; | |
91d76f53 | 628 | } |
f6a9efaa | 629 | |
5b4a0ec0 | 630 | ua_event->handle = ua_event->obj->handle; |
284d8f55 | 631 | |
5b4a0ec0 DG |
632 | DBG2("UST app event %s created successfully for pid:%d", |
633 | ua_event->attr.name, app->key.pid); | |
f6a9efaa | 634 | |
8535a6d9 | 635 | /* If event not enabled, disable it on the tracer */ |
fc34caaa | 636 | if (ua_event->enabled == 0) { |
8535a6d9 DG |
637 | ret = disable_ust_event(app, ua_sess, ua_event); |
638 | if (ret < 0) { | |
fc34caaa DG |
639 | /* |
640 | * If we hit an EPERM, something is wrong with our disable call. If | |
641 | * we get an EEXIST, there is a problem on the tracer side since we | |
642 | * just created it. | |
643 | */ | |
644 | switch (ret) { | |
645 | case -EPERM: | |
646 | /* Code flow problem */ | |
647 | assert(0); | |
648 | case -EEXIST: | |
649 | /* It's OK for our use case. */ | |
650 | ret = 0; | |
651 | break; | |
652 | default: | |
653 | break; | |
654 | } | |
8535a6d9 DG |
655 | goto error; |
656 | } | |
657 | } | |
658 | ||
5b4a0ec0 DG |
659 | error: |
660 | return ret; | |
91d76f53 | 661 | } |
48842b30 | 662 | |
5b4a0ec0 DG |
663 | /* |
664 | * Copy data between an UST app event and a LTT event. | |
665 | */ | |
421cb601 | 666 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
667 | struct ltt_ust_event *uevent) |
668 | { | |
bec39940 | 669 | struct lttng_ht_iter iter; |
55cc08a6 DG |
670 | struct ltt_ust_context *uctx; |
671 | struct ust_app_ctx *ua_ctx; | |
672 | ||
48842b30 DG |
673 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); |
674 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
675 | ||
fc34caaa DG |
676 | ua_event->enabled = uevent->enabled; |
677 | ||
5b4a0ec0 DG |
678 | /* Copy event attributes */ |
679 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
680 | ||
bec39940 | 681 | cds_lfht_for_each_entry(uevent->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
682 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
683 | if (ua_ctx == NULL) { | |
fc34caaa DG |
684 | /* malloc() failed. We should simply stop */ |
685 | return; | |
55cc08a6 | 686 | } |
fc34caaa | 687 | |
bec39940 DG |
688 | lttng_ht_node_init_ulong(&ua_ctx->node, |
689 | (unsigned long) ua_ctx->ctx.ctx); | |
690 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 | 691 | } |
48842b30 DG |
692 | } |
693 | ||
5b4a0ec0 DG |
694 | /* |
695 | * Copy data between an UST app channel and a LTT channel. | |
696 | */ | |
421cb601 | 697 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
698 | struct ltt_ust_channel *uchan) |
699 | { | |
bec39940 DG |
700 | struct lttng_ht_iter iter; |
701 | struct lttng_ht_node_str *ua_event_node; | |
48842b30 | 702 | struct ltt_ust_event *uevent; |
55cc08a6 | 703 | struct ltt_ust_context *uctx; |
48842b30 | 704 | struct ust_app_event *ua_event; |
55cc08a6 | 705 | struct ust_app_ctx *ua_ctx; |
48842b30 | 706 | |
fc34caaa | 707 | DBG2("UST app shadow copy of channel %s started", ua_chan->name); |
48842b30 DG |
708 | |
709 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
710 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
711 | /* Copy event attributes */ |
712 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 | 713 | |
fc34caaa DG |
714 | ua_chan->enabled = uchan->enabled; |
715 | ||
bec39940 | 716 | cds_lfht_for_each_entry(uchan->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
717 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
718 | if (ua_ctx == NULL) { | |
719 | continue; | |
720 | } | |
bec39940 DG |
721 | lttng_ht_node_init_ulong(&ua_ctx->node, |
722 | (unsigned long) ua_ctx->ctx.ctx); | |
723 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 | 724 | } |
48842b30 | 725 | |
421cb601 | 726 | /* Copy all events from ltt ust channel to ust app channel */ |
bec39940 DG |
727 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
728 | struct lttng_ht_iter uiter; | |
ba767faf | 729 | |
bec39940 DG |
730 | lttng_ht_lookup(ua_chan->events, (void *) uevent->attr.name, &uiter); |
731 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
48842b30 | 732 | if (ua_event_node == NULL) { |
421cb601 | 733 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 734 | uevent->attr.name); |
284d8f55 | 735 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 736 | if (ua_event == NULL) { |
5b4a0ec0 | 737 | continue; |
48842b30 | 738 | } |
421cb601 | 739 | shadow_copy_event(ua_event, uevent); |
bec39940 | 740 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
48842b30 | 741 | } |
48842b30 DG |
742 | } |
743 | ||
fc34caaa | 744 | DBG3("UST app shadow copy of channel %s done", ua_chan->name); |
48842b30 DG |
745 | } |
746 | ||
5b4a0ec0 DG |
747 | /* |
748 | * Copy data between a UST app session and a regular LTT session. | |
749 | */ | |
421cb601 | 750 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
bec39940 | 751 | struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 | 752 | { |
bec39940 DG |
753 | struct lttng_ht_node_str *ua_chan_node; |
754 | struct lttng_ht_iter iter; | |
48842b30 DG |
755 | struct ltt_ust_channel *uchan; |
756 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
757 | time_t rawtime; |
758 | struct tm *timeinfo; | |
759 | char datetime[16]; | |
760 | int ret; | |
761 | ||
762 | /* Get date and time for unique app path */ | |
763 | time(&rawtime); | |
764 | timeinfo = localtime(&rawtime); | |
765 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 766 | |
421cb601 | 767 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 | 768 | |
a991f516 | 769 | ua_sess->id = usess->id; |
6df2e2c9 MD |
770 | ua_sess->uid = usess->uid; |
771 | ua_sess->gid = usess->gid; | |
48842b30 | 772 | |
fc34caaa DG |
773 | ret = snprintf(ua_sess->path, PATH_MAX, "%s/%s-%d-%s", usess->pathname, |
774 | app->name, app->key.pid, datetime); | |
477d7741 MD |
775 | if (ret < 0) { |
776 | PERROR("asprintf UST shadow copy session"); | |
777 | /* TODO: We cannot return an error from here.. */ | |
778 | assert(0); | |
779 | } | |
780 | ||
48842b30 DG |
781 | /* TODO: support all UST domain */ |
782 | ||
783 | /* Iterate over all channels in global domain. */ | |
bec39940 DG |
784 | cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter, |
785 | uchan, node.node) { | |
786 | struct lttng_ht_iter uiter; | |
ba767faf | 787 | |
bec39940 DG |
788 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
789 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
5b4a0ec0 | 790 | if (ua_chan_node != NULL) { |
fc34caaa | 791 | /* Session exist. Contiuing. */ |
5b4a0ec0 DG |
792 | continue; |
793 | } | |
421cb601 | 794 | |
5b4a0ec0 DG |
795 | DBG2("Channel %s not found on shadow session copy, creating it", |
796 | uchan->name); | |
797 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
798 | if (ua_chan == NULL) { | |
fc34caaa | 799 | /* malloc failed FIXME: Might want to do handle ENOMEM .. */ |
5b4a0ec0 | 800 | continue; |
48842b30 DG |
801 | } |
802 | ||
5b4a0ec0 | 803 | shadow_copy_channel(ua_chan, uchan); |
bec39940 | 804 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
48842b30 DG |
805 | } |
806 | } | |
807 | ||
78f0bacd DG |
808 | /* |
809 | * Lookup sesison wrapper. | |
810 | */ | |
84cd17c6 MD |
811 | static |
812 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
bec39940 | 813 | struct ust_app *app, struct lttng_ht_iter *iter) |
84cd17c6 MD |
814 | { |
815 | /* Get right UST app session from app */ | |
2c348c10 | 816 | lttng_ht_lookup(app->sessions, (void *)((unsigned long) usess->id), iter); |
84cd17c6 MD |
817 | } |
818 | ||
421cb601 DG |
819 | /* |
820 | * Return ust app session from the app session hashtable using the UST session | |
a991f516 | 821 | * id. |
421cb601 | 822 | */ |
48842b30 DG |
823 | static struct ust_app_session *lookup_session_by_app( |
824 | struct ltt_ust_session *usess, struct ust_app *app) | |
825 | { | |
bec39940 DG |
826 | struct lttng_ht_iter iter; |
827 | struct lttng_ht_node_ulong *node; | |
48842b30 | 828 | |
84cd17c6 | 829 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 830 | node = lttng_ht_iter_get_node_ulong(&iter); |
48842b30 DG |
831 | if (node == NULL) { |
832 | goto error; | |
833 | } | |
834 | ||
835 | return caa_container_of(node, struct ust_app_session, node); | |
836 | ||
837 | error: | |
838 | return NULL; | |
839 | } | |
840 | ||
421cb601 DG |
841 | /* |
842 | * Create a UST session onto the tracer of app and add it the session | |
843 | * hashtable. | |
844 | * | |
845 | * Return ust app session or NULL on error. | |
846 | */ | |
847 | static struct ust_app_session *create_ust_app_session( | |
848 | struct ltt_ust_session *usess, struct ust_app *app) | |
849 | { | |
850 | int ret; | |
851 | struct ust_app_session *ua_sess; | |
852 | ||
853 | ua_sess = lookup_session_by_app(usess, app); | |
854 | if (ua_sess == NULL) { | |
a991f516 MD |
855 | DBG2("UST app pid: %d session id %d not found, creating it", |
856 | app->key.pid, usess->id); | |
421cb601 DG |
857 | ua_sess = alloc_ust_app_session(); |
858 | if (ua_sess == NULL) { | |
859 | /* Only malloc can failed so something is really wrong */ | |
fc34caaa | 860 | goto end; |
421cb601 | 861 | } |
477d7741 | 862 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
863 | } |
864 | ||
865 | if (ua_sess->handle == -1) { | |
866 | ret = ustctl_create_session(app->key.sock); | |
867 | if (ret < 0) { | |
fc34caaa | 868 | ERR("Creating session for app pid %d", app->key.pid); |
421cb601 DG |
869 | goto error; |
870 | } | |
871 | ||
421cb601 DG |
872 | ua_sess->handle = ret; |
873 | ||
874 | /* Add ust app session to app's HT */ | |
2c348c10 | 875 | lttng_ht_node_init_ulong(&ua_sess->node, (unsigned long) ua_sess->id); |
bec39940 | 876 | lttng_ht_add_unique_ulong(app->sessions, &ua_sess->node); |
421cb601 DG |
877 | |
878 | DBG2("UST app session created successfully with handle %d", ret); | |
879 | } | |
880 | ||
fc34caaa | 881 | end: |
421cb601 DG |
882 | return ua_sess; |
883 | ||
884 | error: | |
fc34caaa | 885 | delete_ust_app_session(-1, ua_sess); |
421cb601 DG |
886 | return NULL; |
887 | } | |
888 | ||
55cc08a6 DG |
889 | /* |
890 | * Create a context for the channel on the tracer. | |
891 | */ | |
892 | static | |
893 | int create_ust_app_channel_context(struct ust_app_session *ua_sess, | |
894 | struct ust_app_channel *ua_chan, struct lttng_ust_context *uctx, | |
895 | struct ust_app *app) | |
896 | { | |
897 | int ret = 0; | |
bec39940 DG |
898 | struct lttng_ht_iter iter; |
899 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
900 | struct ust_app_ctx *ua_ctx; |
901 | ||
902 | DBG2("UST app adding context to channel %s", ua_chan->name); | |
903 | ||
bec39940 DG |
904 | lttng_ht_lookup(ua_chan->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
905 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
906 | if (node != NULL) { |
907 | ret = -EEXIST; | |
908 | goto error; | |
909 | } | |
910 | ||
911 | ua_ctx = alloc_ust_app_ctx(uctx); | |
912 | if (ua_ctx == NULL) { | |
913 | /* malloc failed */ | |
914 | ret = -1; | |
915 | goto error; | |
916 | } | |
917 | ||
bec39940 DG |
918 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
919 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 DG |
920 | |
921 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
922 | if (ret < 0) { | |
923 | goto error; | |
924 | } | |
925 | ||
926 | error: | |
927 | return ret; | |
928 | } | |
929 | ||
930 | /* | |
931 | * Create an UST context and enable it for the event on the tracer. | |
932 | */ | |
933 | static | |
934 | int create_ust_app_event_context(struct ust_app_session *ua_sess, | |
935 | struct ust_app_event *ua_event, struct lttng_ust_context *uctx, | |
936 | struct ust_app *app) | |
937 | { | |
938 | int ret = 0; | |
bec39940 DG |
939 | struct lttng_ht_iter iter; |
940 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
941 | struct ust_app_ctx *ua_ctx; |
942 | ||
943 | DBG2("UST app adding context to event %s", ua_event->name); | |
944 | ||
bec39940 DG |
945 | lttng_ht_lookup(ua_event->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
946 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
947 | if (node != NULL) { |
948 | ret = -EEXIST; | |
949 | goto error; | |
950 | } | |
951 | ||
952 | ua_ctx = alloc_ust_app_ctx(uctx); | |
953 | if (ua_ctx == NULL) { | |
954 | /* malloc failed */ | |
955 | ret = -1; | |
956 | goto error; | |
957 | } | |
958 | ||
bec39940 DG |
959 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
960 | lttng_ht_add_unique_ulong(ua_event->ctx, &ua_ctx->node); | |
55cc08a6 DG |
961 | |
962 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
963 | if (ret < 0) { | |
964 | goto error; | |
965 | } | |
966 | ||
967 | error: | |
968 | return ret; | |
969 | } | |
970 | ||
edb67388 DG |
971 | /* |
972 | * Enable on the tracer side a ust app event for the session and channel. | |
973 | */ | |
974 | static | |
975 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 976 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
977 | { |
978 | int ret; | |
979 | ||
980 | ret = enable_ust_event(app, ua_sess, ua_event); | |
981 | if (ret < 0) { | |
982 | goto error; | |
983 | } | |
984 | ||
985 | ua_event->enabled = 1; | |
986 | ||
987 | error: | |
988 | return ret; | |
989 | } | |
990 | ||
9730260e DG |
991 | /* |
992 | * Disable on the tracer side a ust app event for the session and channel. | |
993 | */ | |
994 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
7f79d3a1 | 995 | struct ust_app_event *ua_event, struct ust_app *app) |
9730260e DG |
996 | { |
997 | int ret; | |
998 | ||
999 | ret = disable_ust_event(app, ua_sess, ua_event); | |
1000 | if (ret < 0) { | |
1001 | goto error; | |
1002 | } | |
1003 | ||
1004 | ua_event->enabled = 0; | |
1005 | ||
1006 | error: | |
1007 | return ret; | |
1008 | } | |
1009 | ||
78f0bacd DG |
1010 | /* |
1011 | * Lookup ust app channel for session and disable it on the tracer side. | |
1012 | */ | |
8535a6d9 DG |
1013 | static |
1014 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
1015 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 1016 | { |
8535a6d9 | 1017 | int ret; |
78f0bacd DG |
1018 | |
1019 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
1020 | if (ret < 0) { | |
1021 | goto error; | |
1022 | } | |
1023 | ||
8535a6d9 DG |
1024 | ua_chan->enabled = 0; |
1025 | ||
78f0bacd DG |
1026 | error: |
1027 | return ret; | |
1028 | } | |
1029 | ||
1030 | /* | |
1031 | * Lookup ust app channel for session and enable it on the tracer side. | |
1032 | */ | |
1033 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
1034 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
1035 | { | |
1036 | int ret = 0; | |
bec39940 DG |
1037 | struct lttng_ht_iter iter; |
1038 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1039 | struct ust_app_channel *ua_chan; |
1040 | ||
bec39940 DG |
1041 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1042 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
78f0bacd | 1043 | if (ua_chan_node == NULL) { |
a991f516 MD |
1044 | DBG2("Unable to find channel %s in ust session id %u", |
1045 | uchan->name, ua_sess->id); | |
78f0bacd DG |
1046 | goto error; |
1047 | } | |
1048 | ||
1049 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1050 | ||
1051 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
1052 | if (ret < 0) { | |
1053 | goto error; | |
1054 | } | |
1055 | ||
1056 | error: | |
1057 | return ret; | |
1058 | } | |
1059 | ||
284d8f55 | 1060 | /* |
5b4a0ec0 | 1061 | * Create UST app channel and create it on the tracer. |
284d8f55 | 1062 | */ |
5b4a0ec0 DG |
1063 | static struct ust_app_channel *create_ust_app_channel( |
1064 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
1065 | struct ust_app *app) | |
1066 | { | |
1067 | int ret = 0; | |
bec39940 DG |
1068 | struct lttng_ht_iter iter; |
1069 | struct lttng_ht_node_str *ua_chan_node; | |
5b4a0ec0 DG |
1070 | struct ust_app_channel *ua_chan; |
1071 | ||
1072 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1073 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1074 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
fc34caaa | 1075 | if (ua_chan_node != NULL) { |
5b4a0ec0 | 1076 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
fc34caaa | 1077 | goto end; |
5b4a0ec0 DG |
1078 | } |
1079 | ||
fc34caaa DG |
1080 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); |
1081 | if (ua_chan == NULL) { | |
1082 | /* Only malloc can fail here */ | |
1083 | goto error; | |
1084 | } | |
1085 | shadow_copy_channel(ua_chan, uchan); | |
1086 | ||
5b4a0ec0 DG |
1087 | ret = create_ust_channel(app, ua_sess, ua_chan); |
1088 | if (ret < 0) { | |
fc34caaa DG |
1089 | /* Not found previously means that it does not exist on the tracer */ |
1090 | assert(ret != -EEXIST); | |
5b4a0ec0 DG |
1091 | goto error; |
1092 | } | |
1093 | ||
58f3ca76 DG |
1094 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
1095 | ||
fc34caaa DG |
1096 | DBG2("UST app create channel %s for PID %d completed", ua_chan->name, |
1097 | app->key.pid); | |
1098 | ||
1099 | end: | |
5b4a0ec0 DG |
1100 | return ua_chan; |
1101 | ||
1102 | error: | |
fc34caaa | 1103 | delete_ust_app_channel(-1, ua_chan); |
5b4a0ec0 DG |
1104 | return NULL; |
1105 | } | |
1106 | ||
1107 | /* | |
1108 | * Create UST app event and create it on the tracer side. | |
1109 | */ | |
edb67388 DG |
1110 | static |
1111 | int create_ust_app_event(struct ust_app_session *ua_sess, | |
1112 | struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent, | |
1113 | struct ust_app *app) | |
284d8f55 | 1114 | { |
edb67388 | 1115 | int ret = 0; |
bec39940 DG |
1116 | struct lttng_ht_iter iter; |
1117 | struct lttng_ht_node_str *ua_event_node; | |
5b4a0ec0 | 1118 | struct ust_app_event *ua_event; |
284d8f55 | 1119 | |
5b4a0ec0 | 1120 | /* Get event node */ |
bec39940 DG |
1121 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
1122 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
edb67388 | 1123 | if (ua_event_node != NULL) { |
fc34caaa | 1124 | ret = -EEXIST; |
edb67388 DG |
1125 | goto end; |
1126 | } | |
5b4a0ec0 | 1127 | |
edb67388 DG |
1128 | /* Does not exist so create one */ |
1129 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
1130 | if (ua_event == NULL) { | |
1131 | /* Only malloc can failed so something is really wrong */ | |
1132 | ret = -ENOMEM; | |
fc34caaa | 1133 | goto end; |
5b4a0ec0 | 1134 | } |
edb67388 | 1135 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 1136 | |
edb67388 | 1137 | /* Create it on the tracer side */ |
5b4a0ec0 | 1138 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 1139 | if (ret < 0) { |
fc34caaa DG |
1140 | /* Not found previously means that it does not exist on the tracer */ |
1141 | assert(ret != -EEXIST); | |
284d8f55 DG |
1142 | goto error; |
1143 | } | |
1144 | ||
bec39940 | 1145 | lttng_ht_add_unique_str(ua_chan->events, &ua_event->node); |
284d8f55 | 1146 | |
fc34caaa DG |
1147 | DBG2("UST app create event %s for PID %d completed", ua_event->name, |
1148 | app->key.pid); | |
7f79d3a1 | 1149 | |
edb67388 | 1150 | end: |
fc34caaa DG |
1151 | return ret; |
1152 | ||
5b4a0ec0 | 1153 | error: |
fc34caaa DG |
1154 | /* Valid. Calling here is already in a read side lock */ |
1155 | delete_ust_app_event(-1, ua_event); | |
edb67388 | 1156 | return ret; |
5b4a0ec0 DG |
1157 | } |
1158 | ||
1159 | /* | |
1160 | * Create UST metadata and open it on the tracer side. | |
1161 | */ | |
1162 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
1163 | char *pathname, struct ust_app *app) | |
1164 | { | |
1165 | int ret = 0; | |
1166 | ||
1167 | if (ua_sess->metadata == NULL) { | |
1168 | /* Allocate UST metadata */ | |
1169 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
1170 | if (ua_sess->metadata == NULL) { | |
fc34caaa | 1171 | /* malloc() failed */ |
5b4a0ec0 DG |
1172 | goto error; |
1173 | } | |
1174 | ||
1175 | ret = open_ust_metadata(app, ua_sess); | |
1176 | if (ret < 0) { | |
7db205b5 DG |
1177 | DBG3("Opening metadata failed. Cleaning up memory"); |
1178 | ||
fc34caaa DG |
1179 | /* Cleanup failed metadata struct */ |
1180 | free(ua_sess->metadata); | |
7db205b5 DG |
1181 | /* |
1182 | * This is very important because delete_ust_app_session check if | |
1183 | * the pointer is null or not in order to delete the metadata. | |
1184 | */ | |
1185 | ua_sess->metadata = NULL; | |
5b4a0ec0 DG |
1186 | goto error; |
1187 | } | |
1188 | ||
1189 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
1190 | } | |
1191 | ||
1192 | /* Open UST metadata stream */ | |
1193 | if (ua_sess->metadata->stream_obj == NULL) { | |
1194 | ret = create_ust_stream(app, ua_sess); | |
1195 | if (ret < 0) { | |
1196 | goto error; | |
1197 | } | |
1198 | ||
e11d277b | 1199 | ret = run_as_mkdir(ua_sess->path, S_IRWXU | S_IRWXG, |
67f747d8 | 1200 | ua_sess->uid, ua_sess->gid); |
5b4a0ec0 DG |
1201 | if (ret < 0) { |
1202 | PERROR("mkdir UST metadata"); | |
1203 | goto error; | |
1204 | } | |
1205 | ||
477d7741 MD |
1206 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
1207 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
1208 | if (ret < 0) { |
1209 | PERROR("asprintf UST create stream"); | |
1210 | goto error; | |
1211 | } | |
1212 | ||
1213 | DBG2("UST metadata stream object created for app pid %d", | |
1214 | app->key.pid); | |
1215 | } else { | |
1216 | ERR("Attempting to create stream without metadata opened"); | |
1217 | goto error; | |
1218 | } | |
1219 | ||
1220 | return 0; | |
1221 | ||
1222 | error: | |
1223 | return -1; | |
1224 | } | |
1225 | ||
1226 | /* | |
1227 | * Return pointer to traceable apps list. | |
1228 | */ | |
bec39940 | 1229 | struct lttng_ht *ust_app_get_ht(void) |
5b4a0ec0 DG |
1230 | { |
1231 | return ust_app_ht; | |
1232 | } | |
1233 | ||
1234 | /* | |
1235 | * Return ust app pointer or NULL if not found. | |
1236 | */ | |
1237 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
1238 | { | |
bec39940 DG |
1239 | struct lttng_ht_node_ulong *node; |
1240 | struct lttng_ht_iter iter; | |
5b4a0ec0 DG |
1241 | |
1242 | rcu_read_lock(); | |
bec39940 DG |
1243 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) pid), &iter); |
1244 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1245 | if (node == NULL) { |
1246 | DBG2("UST app no found with pid %d", pid); | |
1247 | goto error; | |
1248 | } | |
1249 | rcu_read_unlock(); | |
1250 | ||
1251 | DBG2("Found UST app by pid %d", pid); | |
1252 | ||
1253 | return caa_container_of(node, struct ust_app, node); | |
1254 | ||
1255 | error: | |
1256 | rcu_read_unlock(); | |
1257 | return NULL; | |
1258 | } | |
1259 | ||
1260 | /* | |
1261 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
1262 | * add it to the global traceable app list. | |
1263 | * | |
0df502fd MD |
1264 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
1265 | * bitness is not supported. | |
5b4a0ec0 DG |
1266 | */ |
1267 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
1268 | { | |
1269 | struct ust_app *lta; | |
1270 | ||
7753dea8 MD |
1271 | if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL) |
1272 | || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) { | |
f943b0fb | 1273 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1274 | "%d-bit long, but no consumerd for this long size is available.\n", |
1275 | msg->name, msg->pid, msg->bits_per_long); | |
88ff5b7f | 1276 | close(sock); |
0df502fd MD |
1277 | return -EINVAL; |
1278 | } | |
5b4a0ec0 DG |
1279 | lta = zmalloc(sizeof(struct ust_app)); |
1280 | if (lta == NULL) { | |
1281 | PERROR("malloc"); | |
1282 | return -ENOMEM; | |
1283 | } | |
1284 | ||
1285 | lta->ppid = msg->ppid; | |
1286 | lta->uid = msg->uid; | |
1287 | lta->gid = msg->gid; | |
7753dea8 | 1288 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1289 | lta->v_major = msg->major; |
1290 | lta->v_minor = msg->minor; | |
1291 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1292 | lta->name[16] = '\0'; | |
bec39940 | 1293 | lta->sessions = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
5b4a0ec0 DG |
1294 | |
1295 | /* Set key map */ | |
1296 | lta->key.pid = msg->pid; | |
bec39940 | 1297 | lttng_ht_node_init_ulong(<a->node, (unsigned long)lta->key.pid); |
5b4a0ec0 | 1298 | lta->key.sock = sock; |
bec39940 | 1299 | lttng_ht_node_init_ulong(<a->key.node, (unsigned long)lta->key.sock); |
5b4a0ec0 DG |
1300 | |
1301 | rcu_read_lock(); | |
bec39940 DG |
1302 | lttng_ht_add_unique_ulong(ust_app_sock_key_map, <a->key.node); |
1303 | lttng_ht_add_unique_ulong(ust_app_ht, <a->node); | |
5b4a0ec0 DG |
1304 | rcu_read_unlock(); |
1305 | ||
1306 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
1307 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, | |
1308 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
1309 | ||
1310 | return 0; | |
1311 | } | |
1312 | ||
1313 | /* | |
1314 | * Unregister app by removing it from the global traceable app list and freeing | |
1315 | * the data struct. | |
1316 | * | |
1317 | * The socket is already closed at this point so no close to sock. | |
1318 | */ | |
1319 | void ust_app_unregister(int sock) | |
1320 | { | |
1321 | struct ust_app *lta; | |
bec39940 DG |
1322 | struct lttng_ht_node_ulong *node; |
1323 | struct lttng_ht_iter iter; | |
525b0740 | 1324 | int ret; |
5b4a0ec0 DG |
1325 | |
1326 | rcu_read_lock(); | |
1327 | lta = find_app_by_sock(sock); | |
1328 | if (lta == NULL) { | |
1329 | ERR("Unregister app sock %d not found!", sock); | |
1330 | goto error; | |
1331 | } | |
1332 | ||
1333 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
1334 | ||
886459c6 MD |
1335 | /* Remove application from socket hash table */ |
1336 | lttng_ht_lookup(ust_app_sock_key_map, (void *)((unsigned long) sock), &iter); | |
1337 | ret = lttng_ht_del(ust_app_sock_key_map, &iter); | |
1338 | assert(!ret); | |
1339 | ||
5b4a0ec0 | 1340 | /* Get the node reference for a call_rcu */ |
bec39940 DG |
1341 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) lta->key.pid), &iter); |
1342 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1343 | if (node == NULL) { |
1344 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
1345 | goto error; | |
1346 | } | |
284d8f55 | 1347 | |
886459c6 | 1348 | /* Remove application from PID hash table */ |
bec39940 | 1349 | ret = lttng_ht_del(ust_app_ht, &iter); |
525b0740 | 1350 | assert(!ret); |
5b4a0ec0 | 1351 | call_rcu(&node->head, delete_ust_app_rcu); |
284d8f55 | 1352 | error: |
5b4a0ec0 DG |
1353 | rcu_read_unlock(); |
1354 | return; | |
284d8f55 DG |
1355 | } |
1356 | ||
1357 | /* | |
5b4a0ec0 | 1358 | * Return traceable_app_count |
284d8f55 | 1359 | */ |
5b4a0ec0 | 1360 | unsigned long ust_app_list_count(void) |
284d8f55 | 1361 | { |
5b4a0ec0 | 1362 | unsigned long count; |
284d8f55 | 1363 | |
5b4a0ec0 | 1364 | rcu_read_lock(); |
bec39940 | 1365 | count = lttng_ht_get_count(ust_app_ht); |
5b4a0ec0 | 1366 | rcu_read_unlock(); |
284d8f55 | 1367 | |
5b4a0ec0 | 1368 | return count; |
284d8f55 DG |
1369 | } |
1370 | ||
5b4a0ec0 DG |
1371 | /* |
1372 | * Fill events array with all events name of all registered apps. | |
1373 | */ | |
1374 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1375 | { |
5b4a0ec0 DG |
1376 | int ret, handle; |
1377 | size_t nbmem, count = 0; | |
bec39940 | 1378 | struct lttng_ht_iter iter; |
5b4a0ec0 DG |
1379 | struct ust_app *app; |
1380 | struct lttng_event *tmp; | |
421cb601 | 1381 | |
5b4a0ec0 DG |
1382 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1383 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1384 | if (tmp == NULL) { | |
1385 | PERROR("zmalloc ust app events"); | |
1386 | ret = -ENOMEM; | |
421cb601 DG |
1387 | goto error; |
1388 | } | |
1389 | ||
5b4a0ec0 | 1390 | rcu_read_lock(); |
421cb601 | 1391 | |
bec39940 | 1392 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
90eaa0d2 | 1393 | struct lttng_ust_tracepoint_iter uiter; |
ac3bd9c0 | 1394 | |
5b4a0ec0 DG |
1395 | handle = ustctl_tracepoint_list(app->key.sock); |
1396 | if (handle < 0) { | |
1397 | ERR("UST app list events getting handle failed for app pid %d", | |
1398 | app->key.pid); | |
1399 | continue; | |
1400 | } | |
421cb601 | 1401 | |
5b4a0ec0 | 1402 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, |
90eaa0d2 | 1403 | &uiter)) != -ENOENT) { |
815564d8 MD |
1404 | if (count >= nbmem) { |
1405 | DBG2("Reallocating event list from %zu to %zu entries", nbmem, | |
1406 | 2 * nbmem); | |
1407 | nbmem *= 2; | |
2f221590 | 1408 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event)); |
5b4a0ec0 DG |
1409 | if (tmp == NULL) { |
1410 | PERROR("realloc ust app events"); | |
1411 | ret = -ENOMEM; | |
1412 | goto rcu_error; | |
1413 | } | |
1414 | } | |
90eaa0d2 DG |
1415 | memcpy(tmp[count].name, uiter.name, LTTNG_UST_SYM_NAME_LEN); |
1416 | memcpy(tmp[count].loglevel, uiter.loglevel, LTTNG_UST_SYM_NAME_LEN); | |
1417 | tmp[count].loglevel_value = uiter.loglevel_value; | |
5b4a0ec0 DG |
1418 | tmp[count].type = LTTNG_UST_TRACEPOINT; |
1419 | tmp[count].pid = app->key.pid; | |
1420 | tmp[count].enabled = -1; | |
1421 | count++; | |
421cb601 | 1422 | } |
421cb601 DG |
1423 | } |
1424 | ||
5b4a0ec0 DG |
1425 | ret = count; |
1426 | *events = tmp; | |
421cb601 | 1427 | |
5b4a0ec0 | 1428 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1429 | |
5b4a0ec0 DG |
1430 | rcu_error: |
1431 | rcu_read_unlock(); | |
421cb601 | 1432 | error: |
5b4a0ec0 | 1433 | return ret; |
421cb601 DG |
1434 | } |
1435 | ||
5b4a0ec0 DG |
1436 | /* |
1437 | * Free and clean all traceable apps of the global list. | |
1438 | */ | |
1439 | void ust_app_clean_list(void) | |
421cb601 | 1440 | { |
5b4a0ec0 | 1441 | int ret; |
bec39940 DG |
1442 | struct lttng_ht_iter iter; |
1443 | struct lttng_ht_node_ulong *node; | |
421cb601 | 1444 | |
5b4a0ec0 | 1445 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1446 | |
5b4a0ec0 | 1447 | rcu_read_lock(); |
421cb601 | 1448 | |
bec39940 DG |
1449 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, node, node) { |
1450 | ret = lttng_ht_del(ust_app_ht, &iter); | |
525b0740 | 1451 | assert(!ret); |
bec39940 | 1452 | call_rcu(&node->head, delete_ust_app_rcu); |
421cb601 | 1453 | } |
bec39940 DG |
1454 | /* Destroy is done only when the ht is empty */ |
1455 | lttng_ht_destroy(ust_app_ht); | |
421cb601 | 1456 | |
bec39940 DG |
1457 | cds_lfht_for_each_entry(ust_app_sock_key_map->ht, &iter.iter, node, node) { |
1458 | ret = lttng_ht_del(ust_app_sock_key_map, &iter); | |
1459 | assert(!ret); | |
1460 | } | |
1461 | /* Destroy is done only when the ht is empty */ | |
1462 | lttng_ht_destroy(ust_app_sock_key_map); | |
421cb601 | 1463 | |
5b4a0ec0 DG |
1464 | rcu_read_unlock(); |
1465 | } | |
1466 | ||
1467 | /* | |
1468 | * Init UST app hash table. | |
1469 | */ | |
1470 | void ust_app_ht_alloc(void) | |
1471 | { | |
bec39940 DG |
1472 | ust_app_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1473 | ust_app_sock_key_map = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
421cb601 DG |
1474 | } |
1475 | ||
78f0bacd DG |
1476 | /* |
1477 | * For a specific UST session, disable the channel for all registered apps. | |
1478 | */ | |
35a9059d | 1479 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1480 | struct ltt_ust_channel *uchan) |
1481 | { | |
1482 | int ret = 0; | |
bec39940 DG |
1483 | struct lttng_ht_iter iter; |
1484 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1485 | struct ust_app *app; |
1486 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1487 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1488 | |
1489 | if (usess == NULL || uchan == NULL) { | |
1490 | ERR("Disabling UST global channel with NULL values"); | |
1491 | ret = -1; | |
1492 | goto error; | |
1493 | } | |
1494 | ||
a991f516 MD |
1495 | DBG2("UST app disabling channel %s from global domain for session id %d", |
1496 | uchan->name, usess->id); | |
78f0bacd DG |
1497 | |
1498 | rcu_read_lock(); | |
1499 | ||
1500 | /* For every registered applications */ | |
bec39940 DG |
1501 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
1502 | struct lttng_ht_iter uiter; | |
78f0bacd DG |
1503 | ua_sess = lookup_session_by_app(usess, app); |
1504 | if (ua_sess == NULL) { | |
1505 | continue; | |
1506 | } | |
1507 | ||
8535a6d9 | 1508 | /* Get channel */ |
bec39940 DG |
1509 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1510 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
8535a6d9 DG |
1511 | /* If the session if found for the app, the channel must be there */ |
1512 | assert(ua_chan_node); | |
1513 | ||
1514 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1515 | /* The channel must not be already disabled */ | |
1516 | assert(ua_chan->enabled == 1); | |
1517 | ||
1518 | /* Disable channel onto application */ | |
1519 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1520 | if (ret < 0) { |
1521 | /* XXX: We might want to report this error at some point... */ | |
1522 | continue; | |
1523 | } | |
1524 | } | |
1525 | ||
1526 | rcu_read_unlock(); | |
1527 | ||
1528 | error: | |
1529 | return ret; | |
1530 | } | |
1531 | ||
1532 | /* | |
1533 | * For a specific UST session, enable the channel for all registered apps. | |
1534 | */ | |
35a9059d | 1535 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1536 | struct ltt_ust_channel *uchan) |
1537 | { | |
1538 | int ret = 0; | |
bec39940 | 1539 | struct lttng_ht_iter iter; |
78f0bacd DG |
1540 | struct ust_app *app; |
1541 | struct ust_app_session *ua_sess; | |
1542 | ||
1543 | if (usess == NULL || uchan == NULL) { | |
1544 | ERR("Adding UST global channel to NULL values"); | |
1545 | ret = -1; | |
1546 | goto error; | |
1547 | } | |
1548 | ||
a991f516 MD |
1549 | DBG2("UST app enabling channel %s to global domain for session id %d", |
1550 | uchan->name, usess->id); | |
78f0bacd DG |
1551 | |
1552 | rcu_read_lock(); | |
1553 | ||
1554 | /* For every registered applications */ | |
bec39940 | 1555 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
78f0bacd DG |
1556 | ua_sess = lookup_session_by_app(usess, app); |
1557 | if (ua_sess == NULL) { | |
1558 | continue; | |
1559 | } | |
1560 | ||
1561 | /* Enable channel onto application */ | |
1562 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1563 | if (ret < 0) { | |
1564 | /* XXX: We might want to report this error at some point... */ | |
1565 | continue; | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | rcu_read_unlock(); | |
1570 | ||
1571 | error: | |
1572 | return ret; | |
1573 | } | |
1574 | ||
b0a40d28 DG |
1575 | /* |
1576 | * Disable an event in a channel and for a specific session. | |
1577 | */ | |
35a9059d DG |
1578 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
1579 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
1580 | { |
1581 | int ret = 0; | |
bec39940 DG |
1582 | struct lttng_ht_iter iter, uiter; |
1583 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
b0a40d28 DG |
1584 | struct ust_app *app; |
1585 | struct ust_app_session *ua_sess; | |
1586 | struct ust_app_channel *ua_chan; | |
1587 | struct ust_app_event *ua_event; | |
1588 | ||
1589 | DBG("UST app disabling event %s for all apps in channel " | |
a991f516 | 1590 | "%s for session id %d", uevent->attr.name, uchan->name, usess->id); |
b0a40d28 DG |
1591 | |
1592 | rcu_read_lock(); | |
1593 | ||
1594 | /* For all registered applications */ | |
bec39940 | 1595 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
b0a40d28 DG |
1596 | ua_sess = lookup_session_by_app(usess, app); |
1597 | if (ua_sess == NULL) { | |
1598 | /* Next app */ | |
1599 | continue; | |
1600 | } | |
1601 | ||
1602 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1603 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1604 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 | 1605 | if (ua_chan_node == NULL) { |
a991f516 MD |
1606 | DBG2("Channel %s not found in session id %d for app pid %d." |
1607 | "Skipping", uchan->name, usess->id, app->key.pid); | |
b0a40d28 DG |
1608 | continue; |
1609 | } | |
1610 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1611 | ||
bec39940 DG |
1612 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
1613 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 DG |
1614 | if (ua_event_node == NULL) { |
1615 | DBG2("Event %s not found in channel %s for app pid %d." | |
35a9059d | 1616 | "Skipping", uevent->attr.name, uchan->name, app->key.pid); |
b0a40d28 DG |
1617 | continue; |
1618 | } | |
1619 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1620 | ||
7f79d3a1 | 1621 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
b0a40d28 DG |
1622 | if (ret < 0) { |
1623 | /* XXX: Report error someday... */ | |
1624 | continue; | |
1625 | } | |
1626 | } | |
1627 | ||
1628 | rcu_read_unlock(); | |
1629 | ||
1630 | return ret; | |
1631 | } | |
1632 | ||
9730260e | 1633 | /* |
edb67388 | 1634 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
1635 | * registered apps. |
1636 | */ | |
35a9059d | 1637 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
1638 | struct ltt_ust_channel *uchan) |
1639 | { | |
1640 | int ret = 0; | |
bec39940 DG |
1641 | struct lttng_ht_iter iter, uiter; |
1642 | struct lttng_ht_node_str *ua_chan_node; | |
9730260e DG |
1643 | struct ust_app *app; |
1644 | struct ust_app_session *ua_sess; | |
1645 | struct ust_app_channel *ua_chan; | |
1646 | struct ust_app_event *ua_event; | |
1647 | ||
1648 | DBG("UST app disabling all event for all apps in channel " | |
a991f516 | 1649 | "%s for session id %d", uchan->name, usess->id); |
9730260e DG |
1650 | |
1651 | rcu_read_lock(); | |
1652 | ||
1653 | /* For all registered applications */ | |
bec39940 | 1654 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
9730260e | 1655 | ua_sess = lookup_session_by_app(usess, app); |
edb67388 DG |
1656 | /* If ua_sess is NULL, there is a code flow error */ |
1657 | assert(ua_sess); | |
9730260e DG |
1658 | |
1659 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1660 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1661 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1662 | /* If the channel is not found, there is a code flow error */ |
1663 | assert(ua_chan_node); | |
1664 | ||
9730260e DG |
1665 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1666 | ||
1667 | /* Disable each events of channel */ | |
bec39940 DG |
1668 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
1669 | node.node) { | |
7f79d3a1 | 1670 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
9730260e DG |
1671 | if (ret < 0) { |
1672 | /* XXX: Report error someday... */ | |
1673 | continue; | |
1674 | } | |
1675 | } | |
1676 | } | |
1677 | ||
1678 | rcu_read_unlock(); | |
1679 | ||
1680 | return ret; | |
1681 | } | |
1682 | ||
421cb601 | 1683 | /* |
5b4a0ec0 | 1684 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1685 | */ |
35a9059d | 1686 | int ust_app_create_channel_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1687 | struct ltt_ust_channel *uchan) |
1688 | { | |
bec39940 | 1689 | struct lttng_ht_iter iter; |
48842b30 DG |
1690 | struct ust_app *app; |
1691 | struct ust_app_session *ua_sess; | |
1692 | struct ust_app_channel *ua_chan; | |
1693 | ||
fc34caaa DG |
1694 | /* Very wrong code flow */ |
1695 | assert(usess); | |
1696 | assert(uchan); | |
421cb601 | 1697 | |
a991f516 MD |
1698 | DBG2("UST app adding channel %s to global domain for session id %d", |
1699 | uchan->name, usess->id); | |
48842b30 DG |
1700 | |
1701 | rcu_read_lock(); | |
421cb601 | 1702 | |
5b4a0ec0 | 1703 | /* For every registered applications */ |
bec39940 | 1704 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
edb67388 DG |
1705 | /* |
1706 | * Create session on the tracer side and add it to app session HT. Note | |
1707 | * that if session exist, it will simply return a pointer to the ust | |
1708 | * app session. | |
1709 | */ | |
421cb601 | 1710 | ua_sess = create_ust_app_session(usess, app); |
509cbaf8 | 1711 | if (ua_sess == NULL) { |
fc34caaa DG |
1712 | /* Major problem here and it's maybe the tracer or malloc() */ |
1713 | goto error; | |
48842b30 DG |
1714 | } |
1715 | ||
421cb601 DG |
1716 | /* Create channel onto application */ |
1717 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1718 | if (ua_chan == NULL) { | |
fc34caaa DG |
1719 | /* Major problem here and it's maybe the tracer or malloc() */ |
1720 | goto error; | |
48842b30 | 1721 | } |
48842b30 | 1722 | } |
5b4a0ec0 | 1723 | |
48842b30 DG |
1724 | rcu_read_unlock(); |
1725 | ||
fc34caaa DG |
1726 | return 0; |
1727 | ||
421cb601 | 1728 | error: |
fc34caaa | 1729 | return -1; |
48842b30 DG |
1730 | } |
1731 | ||
5b4a0ec0 | 1732 | /* |
edb67388 | 1733 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 1734 | */ |
35a9059d | 1735 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1736 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1737 | { | |
1738 | int ret = 0; | |
bec39940 DG |
1739 | struct lttng_ht_iter iter, uiter; |
1740 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
48842b30 DG |
1741 | struct ust_app *app; |
1742 | struct ust_app_session *ua_sess; | |
1743 | struct ust_app_channel *ua_chan; | |
1744 | struct ust_app_event *ua_event; | |
48842b30 | 1745 | |
a991f516 MD |
1746 | DBG("UST app enabling event %s for all apps for session id %d", |
1747 | uevent->attr.name, usess->id); | |
48842b30 | 1748 | |
edb67388 DG |
1749 | /* |
1750 | * NOTE: At this point, this function is called only if the session and | |
1751 | * channel passed are already created for all apps. and enabled on the | |
1752 | * tracer also. | |
1753 | */ | |
1754 | ||
48842b30 | 1755 | rcu_read_lock(); |
421cb601 DG |
1756 | |
1757 | /* For all registered applications */ | |
bec39940 | 1758 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
edb67388 DG |
1759 | ua_sess = lookup_session_by_app(usess, app); |
1760 | /* If ua_sess is NULL, there is a code flow error */ | |
1761 | assert(ua_sess); | |
ba767faf | 1762 | |
edb67388 | 1763 | /* Lookup channel in the ust app session */ |
bec39940 DG |
1764 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1765 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1766 | /* If the channel is not found, there is a code flow error */ |
1767 | assert(ua_chan_node); | |
1768 | ||
1769 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1770 | ||
bec39940 DG |
1771 | lttng_ht_lookup(ua_chan->events, (void*)uevent->attr.name, &uiter); |
1772 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
35a9059d | 1773 | if (ua_event_node == NULL) { |
7f79d3a1 DG |
1774 | DBG3("UST app enable event %s not found for app PID %d." |
1775 | "Skipping app", uevent->attr.name, app->key.pid); | |
35a9059d DG |
1776 | continue; |
1777 | } | |
1778 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1779 | ||
1780 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
1781 | if (ret < 0) { | |
7f79d3a1 | 1782 | goto error; |
48842b30 | 1783 | } |
edb67388 DG |
1784 | } |
1785 | ||
7f79d3a1 | 1786 | error: |
edb67388 | 1787 | rcu_read_unlock(); |
edb67388 DG |
1788 | return ret; |
1789 | } | |
1790 | ||
1791 | /* | |
1792 | * For a specific existing UST session and UST channel, creates the event for | |
1793 | * all registered apps. | |
1794 | */ | |
35a9059d | 1795 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
1796 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1797 | { | |
1798 | int ret = 0; | |
bec39940 DG |
1799 | struct lttng_ht_iter iter, uiter; |
1800 | struct lttng_ht_node_str *ua_chan_node; | |
edb67388 DG |
1801 | struct ust_app *app; |
1802 | struct ust_app_session *ua_sess; | |
1803 | struct ust_app_channel *ua_chan; | |
1804 | ||
a991f516 MD |
1805 | DBG("UST app creating event %s for all apps for session id %d", |
1806 | uevent->attr.name, usess->id); | |
edb67388 | 1807 | |
edb67388 DG |
1808 | rcu_read_lock(); |
1809 | ||
1810 | /* For all registered applications */ | |
bec39940 | 1811 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
edb67388 DG |
1812 | ua_sess = lookup_session_by_app(usess, app); |
1813 | /* If ua_sess is NULL, there is a code flow error */ | |
1814 | assert(ua_sess); | |
48842b30 DG |
1815 | |
1816 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1817 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1818 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1819 | /* If the channel is not found, there is a code flow error */ |
1820 | assert(ua_chan_node); | |
1821 | ||
48842b30 DG |
1822 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1823 | ||
edb67388 DG |
1824 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1825 | if (ret < 0) { | |
fc34caaa DG |
1826 | if (ret != -EEXIST) { |
1827 | /* Possible value at this point: -ENOMEM. If so, we stop! */ | |
1828 | break; | |
1829 | } | |
1830 | DBG2("UST app event %s already exist on app PID %d", | |
1831 | uevent->attr.name, app->key.pid); | |
5b4a0ec0 | 1832 | continue; |
48842b30 | 1833 | } |
48842b30 | 1834 | } |
5b4a0ec0 | 1835 | |
48842b30 DG |
1836 | rcu_read_unlock(); |
1837 | ||
1838 | return ret; | |
1839 | } | |
1840 | ||
5b4a0ec0 DG |
1841 | /* |
1842 | * Start tracing for a specific UST session and app. | |
1843 | */ | |
421cb601 | 1844 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1845 | { |
1846 | int ret = 0; | |
bec39940 | 1847 | struct lttng_ht_iter iter; |
48842b30 DG |
1848 | struct ust_app_session *ua_sess; |
1849 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 1850 | struct ltt_ust_stream *ustream; |
7753dea8 | 1851 | int consumerd_fd; |
48842b30 | 1852 | |
421cb601 | 1853 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 1854 | |
509cbaf8 MD |
1855 | rcu_read_lock(); |
1856 | ||
421cb601 DG |
1857 | ua_sess = lookup_session_by_app(usess, app); |
1858 | if (ua_sess == NULL) { | |
509cbaf8 | 1859 | goto error_rcu_unlock; |
421cb601 | 1860 | } |
48842b30 | 1861 | |
aea829b3 DG |
1862 | /* Upon restart, we skip the setup, already done */ |
1863 | if (ua_sess->started) { | |
8be98f9a | 1864 | goto skip_setup; |
aea829b3 | 1865 | } |
8be98f9a | 1866 | |
421cb601 DG |
1867 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1868 | if (ret < 0) { | |
509cbaf8 | 1869 | goto error_rcu_unlock; |
421cb601 | 1870 | } |
48842b30 | 1871 | |
421cb601 | 1872 | /* For each channel */ |
bec39940 DG |
1873 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
1874 | node.node) { | |
421cb601 DG |
1875 | /* Create all streams */ |
1876 | while (1) { | |
5b4a0ec0 | 1877 | /* Create UST stream */ |
421cb601 DG |
1878 | ustream = zmalloc(sizeof(*ustream)); |
1879 | if (ustream == NULL) { | |
1880 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1881 | goto error_rcu_unlock; |
421cb601 | 1882 | } |
48842b30 | 1883 | |
421cb601 DG |
1884 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
1885 | &ustream->obj); | |
48842b30 | 1886 | if (ret < 0) { |
421cb601 DG |
1887 | /* Got all streams */ |
1888 | break; | |
48842b30 | 1889 | } |
421cb601 | 1890 | ustream->handle = ustream->obj->handle; |
48842b30 | 1891 | |
421cb601 DG |
1892 | /* Order is important */ |
1893 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
477d7741 MD |
1894 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", |
1895 | ua_sess->path, ua_chan->name, | |
1896 | ua_chan->streams.count++); | |
aba8e916 DG |
1897 | if (ret < 0) { |
1898 | PERROR("asprintf UST create stream"); | |
421cb601 | 1899 | continue; |
aba8e916 | 1900 | } |
421cb601 DG |
1901 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1902 | ustream->pathname); | |
1903 | } | |
421cb601 | 1904 | } |
aba8e916 | 1905 | |
7753dea8 MD |
1906 | switch (app->bits_per_long) { |
1907 | case 64: | |
1908 | consumerd_fd = ust_consumerd64_fd; | |
1909 | break; | |
1910 | case 32: | |
1911 | consumerd_fd = ust_consumerd32_fd; | |
1912 | break; | |
1913 | default: | |
1914 | ret = -EINVAL; | |
1915 | goto error_rcu_unlock; | |
1916 | } | |
aea829b3 | 1917 | |
421cb601 | 1918 | /* Setup UST consumer socket and send fds to it */ |
7753dea8 | 1919 | ret = ust_consumer_send_session(consumerd_fd, ua_sess); |
421cb601 | 1920 | if (ret < 0) { |
509cbaf8 | 1921 | goto error_rcu_unlock; |
421cb601 | 1922 | } |
8be98f9a | 1923 | ua_sess->started = 1; |
48842b30 | 1924 | |
8be98f9a | 1925 | skip_setup: |
421cb601 DG |
1926 | /* This start the UST tracing */ |
1927 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
1928 | if (ret < 0) { | |
1929 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 1930 | goto error_rcu_unlock; |
421cb601 | 1931 | } |
5b4a0ec0 | 1932 | |
509cbaf8 | 1933 | rcu_read_unlock(); |
48842b30 | 1934 | |
421cb601 DG |
1935 | /* Quiescent wait after starting trace */ |
1936 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 1937 | |
421cb601 | 1938 | return 0; |
48842b30 | 1939 | |
509cbaf8 MD |
1940 | error_rcu_unlock: |
1941 | rcu_read_unlock(); | |
421cb601 DG |
1942 | return -1; |
1943 | } | |
48842b30 | 1944 | |
8be98f9a MD |
1945 | /* |
1946 | * Stop tracing for a specific UST session and app. | |
1947 | */ | |
1948 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1949 | { | |
1950 | int ret = 0; | |
bec39940 | 1951 | struct lttng_ht_iter iter; |
8be98f9a | 1952 | struct ust_app_session *ua_sess; |
6d3686da | 1953 | struct ust_app_channel *ua_chan; |
8be98f9a MD |
1954 | |
1955 | DBG("Stopping tracing for ust app pid %d", app->key.pid); | |
1956 | ||
1957 | rcu_read_lock(); | |
1958 | ||
1959 | ua_sess = lookup_session_by_app(usess, app); | |
1960 | if (ua_sess == NULL) { | |
1961 | /* Only malloc can failed so something is really wrong */ | |
1962 | goto error_rcu_unlock; | |
1963 | } | |
1964 | ||
7db205b5 DG |
1965 | /* Not started, continuing. */ |
1966 | if (ua_sess->started == 0) { | |
1967 | goto end; | |
1968 | } | |
1969 | ||
9d6c7d3f DG |
1970 | /* This inhibits UST tracing */ |
1971 | ret = ustctl_stop_session(app->key.sock, ua_sess->handle); | |
1972 | if (ret < 0) { | |
1973 | ERR("Error stopping tracing for app pid: %d", app->key.pid); | |
1974 | goto error_rcu_unlock; | |
1975 | } | |
1976 | ||
1977 | /* Quiescent wait after stopping trace */ | |
1978 | ustctl_wait_quiescent(app->key.sock); | |
1979 | ||
1980 | /* Flushing buffers */ | |
bec39940 DG |
1981 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
1982 | node.node) { | |
6d3686da | 1983 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_chan->obj); |
8be98f9a | 1984 | if (ret < 0) { |
7db205b5 DG |
1985 | ERR("UST app PID %d channel %s flush failed with ret %d", |
1986 | app->key.pid, ua_chan->name, ret); | |
6d3686da DG |
1987 | /* Continuing flushing all buffers */ |
1988 | continue; | |
8be98f9a MD |
1989 | } |
1990 | } | |
8be98f9a | 1991 | |
90d97d10 DG |
1992 | /* Flush all buffers before stopping */ |
1993 | ret = ustctl_sock_flush_buffer(app->key.sock, ua_sess->metadata->obj); | |
1994 | if (ret < 0) { | |
7db205b5 DG |
1995 | ERR("UST app PID %d metadata flush failed with ret %d", app->key.pid, |
1996 | ret); | |
90d97d10 DG |
1997 | } |
1998 | ||
7db205b5 | 1999 | ua_sess->started = 0; |
9d6c7d3f | 2000 | |
7db205b5 DG |
2001 | end: |
2002 | rcu_read_unlock(); | |
8be98f9a MD |
2003 | return 0; |
2004 | ||
2005 | error_rcu_unlock: | |
2006 | rcu_read_unlock(); | |
2007 | return -1; | |
2008 | } | |
2009 | ||
84cd17c6 MD |
2010 | /* |
2011 | * Destroy a specific UST session in apps. | |
2012 | */ | |
2013 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2014 | { | |
2015 | struct ust_app_session *ua_sess; | |
2016 | struct lttng_ust_object_data obj; | |
bec39940 DG |
2017 | struct lttng_ht_iter iter; |
2018 | struct lttng_ht_node_ulong *node; | |
525b0740 | 2019 | int ret; |
84cd17c6 MD |
2020 | |
2021 | DBG("Destroy tracing for ust app pid %d", app->key.pid); | |
2022 | ||
2023 | rcu_read_lock(); | |
2024 | ||
2025 | __lookup_session_by_app(usess, app, &iter); | |
bec39940 | 2026 | node = lttng_ht_iter_get_node_ulong(&iter); |
84cd17c6 MD |
2027 | if (node == NULL) { |
2028 | /* Only malloc can failed so something is really wrong */ | |
2029 | goto error_rcu_unlock; | |
2030 | } | |
2031 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
bec39940 | 2032 | ret = lttng_ht_del(app->sessions, &iter); |
525b0740 | 2033 | assert(!ret); |
84cd17c6 MD |
2034 | obj.handle = ua_sess->handle; |
2035 | obj.shm_fd = -1; | |
2036 | obj.wait_fd = -1; | |
2037 | obj.memory_map_size = 0; | |
2038 | ustctl_release_object(app->key.sock, &obj); | |
2039 | ||
7db205b5 DG |
2040 | delete_ust_app_session(app->key.sock, ua_sess); |
2041 | ||
84cd17c6 MD |
2042 | rcu_read_unlock(); |
2043 | ||
2044 | /* Quiescent wait after stopping trace */ | |
2045 | ustctl_wait_quiescent(app->key.sock); | |
2046 | ||
2047 | return 0; | |
2048 | ||
2049 | error_rcu_unlock: | |
2050 | rcu_read_unlock(); | |
2051 | return -1; | |
2052 | } | |
2053 | ||
5b4a0ec0 DG |
2054 | /* |
2055 | * Start tracing for the UST session. | |
2056 | */ | |
421cb601 DG |
2057 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
2058 | { | |
2059 | int ret = 0; | |
bec39940 | 2060 | struct lttng_ht_iter iter; |
421cb601 | 2061 | struct ust_app *app; |
48842b30 | 2062 | |
421cb601 DG |
2063 | DBG("Starting all UST traces"); |
2064 | ||
2065 | rcu_read_lock(); | |
421cb601 | 2066 | |
bec39940 | 2067 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
421cb601 | 2068 | ret = ust_app_start_trace(usess, app); |
48842b30 | 2069 | if (ret < 0) { |
5b4a0ec0 DG |
2070 | /* Continue to next apps even on error */ |
2071 | continue; | |
48842b30 | 2072 | } |
48842b30 | 2073 | } |
5b4a0ec0 | 2074 | |
48842b30 DG |
2075 | rcu_read_unlock(); |
2076 | ||
2077 | return 0; | |
2078 | } | |
487cf67c | 2079 | |
8be98f9a MD |
2080 | /* |
2081 | * Start tracing for the UST session. | |
2082 | */ | |
2083 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
2084 | { | |
2085 | int ret = 0; | |
bec39940 | 2086 | struct lttng_ht_iter iter; |
8be98f9a MD |
2087 | struct ust_app *app; |
2088 | ||
2089 | DBG("Stopping all UST traces"); | |
2090 | ||
2091 | rcu_read_lock(); | |
2092 | ||
bec39940 | 2093 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
8be98f9a MD |
2094 | ret = ust_app_stop_trace(usess, app); |
2095 | if (ret < 0) { | |
2096 | /* Continue to next apps even on error */ | |
2097 | continue; | |
2098 | } | |
2099 | } | |
2100 | ||
2101 | rcu_read_unlock(); | |
2102 | ||
2103 | return 0; | |
2104 | } | |
2105 | ||
84cd17c6 MD |
2106 | /* |
2107 | * Destroy app UST session. | |
2108 | */ | |
2109 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
2110 | { | |
2111 | int ret = 0; | |
bec39940 | 2112 | struct lttng_ht_iter iter; |
84cd17c6 MD |
2113 | struct ust_app *app; |
2114 | ||
2115 | DBG("Destroy all UST traces"); | |
2116 | ||
2117 | rcu_read_lock(); | |
2118 | ||
bec39940 | 2119 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
84cd17c6 MD |
2120 | ret = ust_app_destroy_trace(usess, app); |
2121 | if (ret < 0) { | |
2122 | /* Continue to next apps even on error */ | |
2123 | continue; | |
2124 | } | |
2125 | } | |
2126 | ||
2127 | rcu_read_unlock(); | |
2128 | ||
2129 | return 0; | |
2130 | } | |
2131 | ||
5b4a0ec0 DG |
2132 | /* |
2133 | * Add channels/events from UST global domain to registered apps at sock. | |
2134 | */ | |
487cf67c DG |
2135 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
2136 | { | |
2137 | int ret = 0; | |
bec39940 | 2138 | struct lttng_ht_iter iter, uiter; |
487cf67c DG |
2139 | struct ust_app *app; |
2140 | struct ust_app_session *ua_sess; | |
2141 | struct ust_app_channel *ua_chan; | |
2142 | struct ust_app_event *ua_event; | |
1f3580c7 DG |
2143 | |
2144 | if (usess == NULL) { | |
5b4a0ec0 | 2145 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
2146 | goto error; |
2147 | } | |
2148 | ||
a991f516 MD |
2149 | DBG2("UST app global update for app sock %d for session id %d", sock, |
2150 | usess->id); | |
487cf67c | 2151 | |
284d8f55 DG |
2152 | rcu_read_lock(); |
2153 | ||
487cf67c DG |
2154 | app = find_app_by_sock(sock); |
2155 | if (app == NULL) { | |
2156 | ERR("Failed to update app sock %d", sock); | |
2157 | goto error; | |
2158 | } | |
2159 | ||
421cb601 | 2160 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 2161 | if (ua_sess == NULL) { |
487cf67c DG |
2162 | goto error; |
2163 | } | |
2164 | ||
284d8f55 DG |
2165 | /* |
2166 | * We can iterate safely here over all UST app session sicne the create ust | |
2167 | * app session above made a shadow copy of the UST global domain from the | |
2168 | * ltt ust session. | |
2169 | */ | |
bec39940 DG |
2170 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2171 | node.node) { | |
284d8f55 DG |
2172 | ret = create_ust_channel(app, ua_sess, ua_chan); |
2173 | if (ret < 0) { | |
2174 | /* FIXME: Should we quit here or continue... */ | |
2175 | continue; | |
487cf67c DG |
2176 | } |
2177 | ||
284d8f55 | 2178 | /* For each events */ |
bec39940 DG |
2179 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
2180 | node.node) { | |
284d8f55 DG |
2181 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
2182 | if (ret < 0) { | |
2183 | /* FIXME: Should we quit here or continue... */ | |
2184 | continue; | |
487cf67c | 2185 | } |
36dc12cc | 2186 | } |
487cf67c DG |
2187 | } |
2188 | ||
36dc12cc | 2189 | if (usess->start_trace) { |
421cb601 | 2190 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 2191 | if (ret < 0) { |
36dc12cc DG |
2192 | goto error; |
2193 | } | |
2194 | ||
36dc12cc DG |
2195 | DBG2("UST trace started for app pid %d", app->key.pid); |
2196 | } | |
2197 | ||
487cf67c DG |
2198 | error: |
2199 | rcu_read_unlock(); | |
2200 | return; | |
2201 | } | |
55cc08a6 DG |
2202 | |
2203 | /* | |
2204 | * Add context to a specific channel for global UST domain. | |
2205 | */ | |
2206 | int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess, | |
2207 | struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx) | |
2208 | { | |
2209 | int ret = 0; | |
bec39940 DG |
2210 | struct lttng_ht_node_str *ua_chan_node; |
2211 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2212 | struct ust_app_channel *ua_chan = NULL; |
2213 | struct ust_app_session *ua_sess; | |
2214 | struct ust_app *app; | |
2215 | ||
2216 | rcu_read_lock(); | |
2217 | ||
bec39940 | 2218 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
55cc08a6 DG |
2219 | ua_sess = lookup_session_by_app(usess, app); |
2220 | if (ua_sess == NULL) { | |
2221 | continue; | |
2222 | } | |
2223 | ||
2224 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2225 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2226 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2227 | if (ua_chan_node == NULL) { |
2228 | continue; | |
2229 | } | |
2230 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2231 | node); | |
2232 | ||
2233 | ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app); | |
2234 | if (ret < 0) { | |
2235 | continue; | |
2236 | } | |
2237 | } | |
2238 | ||
55cc08a6 DG |
2239 | rcu_read_unlock(); |
2240 | return ret; | |
2241 | } | |
2242 | ||
2243 | /* | |
2244 | * Add context to a specific event in a channel for global UST domain. | |
2245 | */ | |
2246 | int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess, | |
2247 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
2248 | struct ltt_ust_context *uctx) | |
2249 | { | |
2250 | int ret = 0; | |
bec39940 DG |
2251 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; |
2252 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2253 | struct ust_app_session *ua_sess; |
2254 | struct ust_app_event *ua_event; | |
2255 | struct ust_app_channel *ua_chan = NULL; | |
2256 | struct ust_app *app; | |
2257 | ||
2258 | rcu_read_lock(); | |
2259 | ||
bec39940 | 2260 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, node.node) { |
55cc08a6 DG |
2261 | ua_sess = lookup_session_by_app(usess, app); |
2262 | if (ua_sess == NULL) { | |
2263 | continue; | |
2264 | } | |
2265 | ||
2266 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2267 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2268 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2269 | if (ua_chan_node == NULL) { |
2270 | continue; | |
2271 | } | |
2272 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2273 | node); | |
2274 | ||
bec39940 DG |
2275 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
2276 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2277 | if (ua_event_node == NULL) { |
2278 | continue; | |
2279 | } | |
2280 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, | |
2281 | node); | |
2282 | ||
2283 | ret = create_ust_app_event_context(ua_sess, ua_event, &uctx->ctx, app); | |
2284 | if (ret < 0) { | |
2285 | continue; | |
2286 | } | |
2287 | } | |
2288 | ||
55cc08a6 DG |
2289 | rcu_read_unlock(); |
2290 | return ret; | |
2291 | } | |
76d45b40 DG |
2292 | |
2293 | /* | |
2294 | * Enable event for a channel from a UST session for a specific PID. | |
2295 | */ | |
2296 | int ust_app_enable_event_pid(struct ltt_ust_session *usess, | |
2297 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2298 | { | |
2299 | int ret = 0; | |
bec39940 DG |
2300 | struct lttng_ht_iter iter; |
2301 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
76d45b40 DG |
2302 | struct ust_app *app; |
2303 | struct ust_app_session *ua_sess; | |
2304 | struct ust_app_channel *ua_chan; | |
2305 | struct ust_app_event *ua_event; | |
2306 | ||
2307 | DBG("UST app enabling event %s for PID %d", uevent->attr.name, pid); | |
2308 | ||
2309 | rcu_read_lock(); | |
2310 | ||
2311 | app = ust_app_find_by_pid(pid); | |
2312 | if (app == NULL) { | |
2313 | ERR("UST app enable event per PID %d not found", pid); | |
2314 | ret = -1; | |
2315 | goto error; | |
2316 | } | |
2317 | ||
2318 | ua_sess = lookup_session_by_app(usess, app); | |
2319 | /* If ua_sess is NULL, there is a code flow error */ | |
2320 | assert(ua_sess); | |
2321 | ||
2322 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2323 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2324 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2325 | /* If the channel is not found, there is a code flow error */ |
2326 | assert(ua_chan_node); | |
2327 | ||
2328 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2329 | ||
bec39940 DG |
2330 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2331 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2332 | if (ua_event_node == NULL) { |
2333 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); | |
2334 | if (ret < 0) { | |
2335 | goto error; | |
2336 | } | |
2337 | } else { | |
2338 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2339 | ||
2340 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2341 | if (ret < 0) { | |
2342 | goto error; | |
2343 | } | |
2344 | } | |
2345 | ||
2346 | error: | |
2347 | rcu_read_unlock(); | |
2348 | return ret; | |
2349 | } | |
7f79d3a1 DG |
2350 | |
2351 | /* | |
2352 | * Disable event for a channel from a UST session for a specific PID. | |
2353 | */ | |
2354 | int ust_app_disable_event_pid(struct ltt_ust_session *usess, | |
2355 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2356 | { | |
2357 | int ret = 0; | |
bec39940 DG |
2358 | struct lttng_ht_iter iter; |
2359 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
7f79d3a1 DG |
2360 | struct ust_app *app; |
2361 | struct ust_app_session *ua_sess; | |
2362 | struct ust_app_channel *ua_chan; | |
2363 | struct ust_app_event *ua_event; | |
2364 | ||
2365 | DBG("UST app disabling event %s for PID %d", uevent->attr.name, pid); | |
2366 | ||
2367 | rcu_read_lock(); | |
2368 | ||
2369 | app = ust_app_find_by_pid(pid); | |
2370 | if (app == NULL) { | |
2371 | ERR("UST app disable event per PID %d not found", pid); | |
2372 | ret = -1; | |
2373 | goto error; | |
2374 | } | |
2375 | ||
2376 | ua_sess = lookup_session_by_app(usess, app); | |
2377 | /* If ua_sess is NULL, there is a code flow error */ | |
2378 | assert(ua_sess); | |
2379 | ||
2380 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2381 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2382 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2383 | if (ua_chan_node == NULL) { |
2384 | /* Channel does not exist, skip disabling */ | |
2385 | goto error; | |
2386 | } | |
2387 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2388 | ||
bec39940 DG |
2389 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2390 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2391 | if (ua_event_node == NULL) { |
2392 | /* Event does not exist, skip disabling */ | |
2393 | goto error; | |
2394 | } | |
2395 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2396 | ||
2397 | ret = disable_ust_app_event(ua_sess, ua_event, app); | |
2398 | if (ret < 0) { | |
2399 | goto error; | |
2400 | } | |
2401 | ||
2402 | error: | |
2403 | rcu_read_unlock(); | |
2404 | return ret; | |
2405 | } |