Commit | Line | Data |
---|---|---|
91d76f53 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
82a3637f DG |
6 | * as published by the Free Software Foundation; only version 2 |
7 | * of the License. | |
91d76f53 DG |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <errno.h> | |
21 | #include <pthread.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
099e26bd | 24 | #include <string.h> |
aba8e916 DG |
25 | #include <sys/stat.h> |
26 | #include <sys/types.h> | |
099e26bd | 27 | #include <unistd.h> |
91d76f53 | 28 | |
0df502fd | 29 | #include <urcu/compiler.h> |
1e307fab | 30 | #include <lttngerr.h> |
48842b30 | 31 | #include <lttng-share.h> |
1e307fab | 32 | |
f6a9efaa | 33 | #include "hashtable.h" |
56fff090 | 34 | #include "ust-app.h" |
48842b30 | 35 | #include "ust-consumer.h" |
d80a6244 DG |
36 | #include "ust-ctl.h" |
37 | ||
38 | /* | |
39 | * Delete ust app event safely. RCU read lock must be held before calling | |
40 | * this function. | |
41 | */ | |
42 | static void delete_ust_app_event(int sock, struct ust_app_event *ua_event) | |
43 | { | |
44 | /* TODO : remove context */ | |
45 | //struct ust_app_ctx *ltctx; | |
46 | //cds_lfht_for_each_entry(lte->ctx, &iter, ltctx, node) { | |
47 | // delete_ust_app_ctx(sock, ltctx); | |
48 | //} | |
49 | ||
edb67388 DG |
50 | if (ua_event->obj != NULL) { |
51 | ustctl_release_object(sock, ua_event->obj); | |
52 | free(ua_event->obj); | |
53 | } | |
d80a6244 DG |
54 | free(ua_event); |
55 | } | |
56 | ||
57 | /* | |
58 | * Delete ust app stream safely. RCU read lock must be held before calling | |
59 | * this function. | |
60 | */ | |
61 | static void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream) | |
62 | { | |
84cd17c6 MD |
63 | ustctl_release_object(sock, stream->obj); |
64 | free(stream->obj); | |
65 | free(stream); | |
d80a6244 DG |
66 | } |
67 | ||
68 | /* | |
69 | * Delete ust app channel safely. RCU read lock must be held before calling | |
70 | * this function. | |
71 | */ | |
72 | static void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan) | |
73 | { | |
74 | int ret; | |
75 | struct cds_lfht_iter iter; | |
76 | struct ust_app_event *ua_event; | |
77 | struct ltt_ust_stream *stream, *stmp; | |
78 | ||
79 | cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) { | |
84cd17c6 | 80 | cds_list_del(&stream->list); |
d80a6244 DG |
81 | delete_ust_app_stream(sock, stream); |
82 | } | |
83 | ||
84 | /* TODO : remove channel context */ | |
85 | //cds_lfht_for_each_entry(ltc->ctx, &iter, ltctx, node) { | |
525b0740 MD |
86 | // ret = hashtable_del(ltc->ctx, &iter); |
87 | // assert(!ret); | |
d80a6244 DG |
88 | // delete_ust_app_ctx(sock, ltctx); |
89 | //} | |
90 | //ret = hashtable_destroy(ltc->ctx); | |
91 | ||
92 | cds_lfht_for_each_entry(ua_chan->events, &iter, ua_event, node) { | |
525b0740 MD |
93 | ret = hashtable_del(ua_chan->events, &iter); |
94 | assert(!ret); | |
d80a6244 DG |
95 | delete_ust_app_event(sock, ua_event); |
96 | } | |
97 | ||
98 | ret = hashtable_destroy(ua_chan->events); | |
99 | if (ret < 0) { | |
100 | ERR("UST app destroy session hashtable failed"); | |
101 | goto error; | |
102 | } | |
edb67388 DG |
103 | |
104 | if (ua_chan->obj != NULL) { | |
105 | ustctl_release_object(sock, ua_chan->obj); | |
106 | free(ua_chan->obj); | |
107 | } | |
84cd17c6 | 108 | free(ua_chan); |
d80a6244 DG |
109 | |
110 | error: | |
111 | return; | |
112 | } | |
113 | ||
114 | /* | |
115 | * Delete ust app session safely. RCU read lock must be held before calling | |
116 | * this function. | |
117 | */ | |
118 | static void delete_ust_app_session(int sock, | |
119 | struct ust_app_session *ua_sess) | |
120 | { | |
121 | int ret; | |
122 | struct cds_lfht_iter iter; | |
123 | struct ust_app_channel *ua_chan; | |
124 | ||
125 | if (ua_sess->metadata) { | |
84cd17c6 MD |
126 | ustctl_release_object(sock, ua_sess->metadata->stream_obj); |
127 | free(ua_sess->metadata->stream_obj); | |
128 | ustctl_release_object(sock, ua_sess->metadata->obj); | |
129 | free(ua_sess->metadata->obj); | |
d80a6244 DG |
130 | } |
131 | ||
132 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { | |
525b0740 MD |
133 | ret = hashtable_del(ua_sess->channels, &iter); |
134 | assert(!ret); | |
d80a6244 DG |
135 | delete_ust_app_channel(sock, ua_chan); |
136 | } | |
137 | ||
138 | ret = hashtable_destroy(ua_sess->channels); | |
139 | if (ret < 0) { | |
140 | ERR("UST app destroy session hashtable failed"); | |
141 | goto error; | |
142 | } | |
143 | ||
144 | error: | |
145 | return; | |
146 | } | |
91d76f53 DG |
147 | |
148 | /* | |
284d8f55 DG |
149 | * Delete a traceable application structure from the global list. Never call |
150 | * this function outside of a call_rcu call. | |
91d76f53 | 151 | */ |
284d8f55 | 152 | static void delete_ust_app(struct ust_app *app) |
91d76f53 | 153 | { |
f6a9efaa DG |
154 | int ret; |
155 | struct cds_lfht_node *node; | |
156 | struct cds_lfht_iter iter; | |
284d8f55 | 157 | struct ust_app_session *ua_sess; |
6414a713 | 158 | int sock; |
44d3bd01 | 159 | |
f6a9efaa | 160 | rcu_read_lock(); |
44d3bd01 | 161 | |
f6a9efaa DG |
162 | /* Remove from key hash table */ |
163 | node = hashtable_lookup(ust_app_sock_key_map, | |
284d8f55 | 164 | (void *) ((unsigned long) app->key.sock), sizeof(void *), &iter); |
f6a9efaa | 165 | if (node == NULL) { |
284d8f55 DG |
166 | /* Not suppose to happen */ |
167 | ERR("UST app key %d not found in key hash table", app->key.sock); | |
d80a6244 | 168 | goto end; |
284d8f55 DG |
169 | } |
170 | ||
171 | ret = hashtable_del(ust_app_sock_key_map, &iter); | |
172 | if (ret) { | |
173 | ERR("UST app unable to delete app sock %d from key hash table", | |
174 | app->key.sock); | |
f6a9efaa | 175 | } else { |
284d8f55 DG |
176 | DBG2("UST app pair sock %d key %d deleted", |
177 | app->key.sock, app->key.pid); | |
f6a9efaa DG |
178 | } |
179 | ||
d80a6244 DG |
180 | /* Socket is already closed at this point */ |
181 | ||
182 | /* Delete ust app sessions info */ | |
6414a713 MD |
183 | sock = app->key.sock; |
184 | app->key.sock = -1; | |
d80a6244 | 185 | |
284d8f55 | 186 | cds_lfht_for_each_entry(app->sessions, &iter, ua_sess, node) { |
525b0740 MD |
187 | ret = hashtable_del(app->sessions, &iter); |
188 | assert(!ret); | |
284d8f55 | 189 | delete_ust_app_session(app->key.sock, ua_sess); |
d80a6244 | 190 | } |
f6a9efaa | 191 | |
284d8f55 | 192 | ret = hashtable_destroy(app->sessions); |
d80a6244 DG |
193 | if (ret < 0) { |
194 | ERR("UST app destroy session hashtable failed"); | |
195 | goto end; | |
196 | } | |
197 | ||
6414a713 MD |
198 | /* |
199 | * Wait until we have removed the key from the sock hash table | |
200 | * before closing this socket, otherwise an application could | |
201 | * re-use the socket ID and race with the teardown, using the | |
202 | * same hash table entry. | |
203 | */ | |
204 | close(sock); | |
d80a6244 | 205 | |
284d8f55 DG |
206 | DBG2("UST app pid %d deleted", app->key.pid); |
207 | free(app); | |
d80a6244 | 208 | end: |
f6a9efaa | 209 | rcu_read_unlock(); |
099e26bd DG |
210 | } |
211 | ||
212 | /* | |
f6a9efaa | 213 | * URCU intermediate call to delete an UST app. |
099e26bd | 214 | */ |
f6a9efaa | 215 | static void delete_ust_app_rcu(struct rcu_head *head) |
099e26bd | 216 | { |
f6a9efaa DG |
217 | struct cds_lfht_node *node = |
218 | caa_container_of(head, struct cds_lfht_node, head); | |
219 | struct ust_app *app = | |
220 | caa_container_of(node, struct ust_app, node); | |
221 | ||
222 | delete_ust_app(app); | |
099e26bd DG |
223 | } |
224 | ||
225 | /* | |
421cb601 DG |
226 | * Find an ust_app using the sock and return it. RCU read side lock must be |
227 | * held before calling this helper function. | |
099e26bd | 228 | */ |
f6a9efaa | 229 | static struct ust_app *find_app_by_sock(int sock) |
099e26bd | 230 | { |
f6a9efaa DG |
231 | struct cds_lfht_node *node; |
232 | struct ust_app_key *key; | |
233 | struct cds_lfht_iter iter; | |
f6a9efaa | 234 | |
f6a9efaa DG |
235 | node = hashtable_lookup(ust_app_sock_key_map, |
236 | (void *)((unsigned long) sock), sizeof(void *), &iter); | |
237 | if (node == NULL) { | |
238 | DBG2("UST app find by sock %d key not found", sock); | |
f6a9efaa DG |
239 | goto error; |
240 | } | |
241 | ||
242 | key = caa_container_of(node, struct ust_app_key, node); | |
243 | ||
244 | node = hashtable_lookup(ust_app_ht, | |
245 | (void *)((unsigned long) key->pid), sizeof(void *), &iter); | |
246 | if (node == NULL) { | |
247 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
248 | goto error; |
249 | } | |
f6a9efaa DG |
250 | return caa_container_of(node, struct ust_app, node); |
251 | ||
252 | error: | |
253 | return NULL; | |
099e26bd DG |
254 | } |
255 | ||
9730260e DG |
256 | /* |
257 | * Disable the specified event on to UST tracer for the UST session. | |
258 | */ | |
259 | static int disable_ust_event(struct ust_app *app, | |
260 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
261 | { | |
262 | int ret; | |
263 | ||
264 | ret = ustctl_disable(app->key.sock, ua_event->obj); | |
265 | if (ret < 0) { | |
266 | ERR("UST app event %s disable failed for app (pid: %d) " | |
267 | "and session handle %d with ret %d", | |
268 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
269 | goto error; | |
270 | } | |
271 | ||
272 | DBG2("UST app event %s disabled successfully for app (pid: %d)", | |
273 | ua_event->attr.name, app->key.pid); | |
274 | ||
275 | error: | |
276 | return ret; | |
277 | } | |
278 | ||
78f0bacd DG |
279 | /* |
280 | * Disable the specified channel on to UST tracer for the UST session. | |
281 | */ | |
282 | static int disable_ust_channel(struct ust_app *app, | |
283 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
284 | { | |
285 | int ret; | |
286 | ||
287 | ret = ustctl_disable(app->key.sock, ua_chan->obj); | |
288 | if (ret < 0) { | |
289 | ERR("UST app channel %s disable failed for app (pid: %d) " | |
290 | "and session handle %d with ret %d", | |
291 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
292 | goto error; | |
293 | } | |
294 | ||
78f0bacd DG |
295 | DBG2("UST app channel %s disabled successfully for app (pid: %d)", |
296 | ua_chan->name, app->key.pid); | |
297 | ||
298 | error: | |
299 | return ret; | |
300 | } | |
301 | ||
302 | /* | |
303 | * Enable the specified channel on to UST tracer for the UST session. | |
304 | */ | |
305 | static int enable_ust_channel(struct ust_app *app, | |
306 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
307 | { | |
308 | int ret; | |
309 | ||
310 | ret = ustctl_enable(app->key.sock, ua_chan->obj); | |
311 | if (ret < 0) { | |
312 | ERR("UST app channel %s enable failed for app (pid: %d) " | |
313 | "and session handle %d with ret %d", | |
314 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
315 | goto error; | |
316 | } | |
317 | ||
318 | ua_chan->enabled = 1; | |
319 | ||
320 | DBG2("UST app channel %s enabled successfully for app (pid: %d)", | |
321 | ua_chan->name, app->key.pid); | |
322 | ||
323 | error: | |
324 | return ret; | |
325 | } | |
326 | ||
edb67388 DG |
327 | /* |
328 | * Enable the specified event on to UST tracer for the UST session. | |
329 | */ | |
330 | static int enable_ust_event(struct ust_app *app, | |
331 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
332 | { | |
333 | int ret; | |
334 | ||
335 | ret = ustctl_enable(app->key.sock, ua_event->obj); | |
336 | if (ret < 0) { | |
337 | ERR("UST app event %s enable failed for app (pid: %d) " | |
338 | "and session handle %d with ret %d", | |
339 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
340 | goto error; | |
341 | } | |
342 | ||
343 | DBG2("UST app event %s enabled successfully for app (pid: %d)", | |
344 | ua_event->attr.name, app->key.pid); | |
345 | ||
346 | error: | |
347 | return ret; | |
348 | } | |
349 | ||
099e26bd | 350 | /* |
5b4a0ec0 | 351 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 352 | */ |
5b4a0ec0 DG |
353 | static int open_ust_metadata(struct ust_app *app, |
354 | struct ust_app_session *ua_sess) | |
0177d773 | 355 | { |
5b4a0ec0 DG |
356 | int ret; |
357 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 358 | |
5b4a0ec0 DG |
359 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
360 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
361 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
362 | uattr.switch_timer_interval = | |
363 | ua_sess->metadata->attr.switch_timer_interval; | |
364 | uattr.read_timer_interval = | |
365 | ua_sess->metadata->attr.read_timer_interval; | |
366 | uattr.output = ua_sess->metadata->attr.output; | |
367 | ||
368 | /* UST tracer metadata creation */ | |
369 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
370 | &ua_sess->metadata->obj); | |
371 | if (ret < 0) { | |
372 | ERR("UST app open metadata failed for app pid:%d", | |
373 | app->key.pid); | |
f6a9efaa | 374 | goto error; |
0177d773 | 375 | } |
f6a9efaa DG |
376 | |
377 | error: | |
5b4a0ec0 | 378 | return ret; |
91d76f53 DG |
379 | } |
380 | ||
381 | /* | |
5b4a0ec0 | 382 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 383 | */ |
5b4a0ec0 DG |
384 | static int create_ust_stream(struct ust_app *app, |
385 | struct ust_app_session *ua_sess) | |
91d76f53 | 386 | { |
5b4a0ec0 | 387 | int ret; |
421cb601 | 388 | |
5b4a0ec0 DG |
389 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, |
390 | &ua_sess->metadata->stream_obj); | |
391 | if (ret < 0) { | |
392 | ERR("UST create metadata stream failed"); | |
421cb601 | 393 | goto error; |
91d76f53 | 394 | } |
421cb601 | 395 | |
421cb601 | 396 | error: |
5b4a0ec0 | 397 | return ret; |
91d76f53 DG |
398 | } |
399 | ||
b551a063 | 400 | /* |
5b4a0ec0 | 401 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 402 | */ |
5b4a0ec0 DG |
403 | static int create_ust_channel(struct ust_app *app, |
404 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 405 | { |
5b4a0ec0 | 406 | int ret; |
b551a063 | 407 | |
5b4a0ec0 DG |
408 | /* TODO: remove cast and use lttng-ust-abi.h */ |
409 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
410 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); | |
411 | if (ret < 0) { | |
412 | DBG("Error creating channel %s for app (pid: %d, sock: %d) " | |
413 | "and session handle %d with ret %d", | |
414 | ua_chan->name, app->key.pid, app->key.sock, | |
415 | ua_sess->handle, ret); | |
b551a063 DG |
416 | goto error; |
417 | } | |
418 | ||
5b4a0ec0 DG |
419 | ua_chan->handle = ua_chan->obj->handle; |
420 | ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; | |
421 | ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; | |
422 | ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; | |
b551a063 | 423 | |
5b4a0ec0 DG |
424 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
425 | ua_chan->name, app->key.pid, app->key.sock); | |
b551a063 | 426 | |
8535a6d9 DG |
427 | /* If channel is not enabled, disable it on the tracer */ |
428 | if (!ua_chan->enabled) { | |
429 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
430 | if (ret < 0) { | |
431 | goto error; | |
432 | } | |
433 | } | |
434 | ||
b551a063 DG |
435 | error: |
436 | return ret; | |
437 | } | |
438 | ||
91d76f53 | 439 | /* |
5b4a0ec0 | 440 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 441 | */ |
edb67388 DG |
442 | static |
443 | int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess, | |
444 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event) | |
91d76f53 | 445 | { |
5b4a0ec0 | 446 | int ret = 0; |
284d8f55 | 447 | |
5b4a0ec0 DG |
448 | /* Create UST event on tracer */ |
449 | ret = ustctl_create_event(app->key.sock, &ua_event->attr, ua_chan->obj, | |
450 | &ua_event->obj); | |
451 | if (ret < 0) { | |
452 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
453 | ua_event->attr.name, app->key.pid, ret); | |
454 | goto error; | |
91d76f53 | 455 | } |
f6a9efaa | 456 | |
5b4a0ec0 | 457 | ua_event->handle = ua_event->obj->handle; |
284d8f55 | 458 | |
5b4a0ec0 DG |
459 | DBG2("UST app event %s created successfully for pid:%d", |
460 | ua_event->attr.name, app->key.pid); | |
f6a9efaa | 461 | |
8535a6d9 DG |
462 | /* If event not enabled, disable it on the tracer */ |
463 | if (!ua_event->enabled) { | |
464 | ret = disable_ust_event(app, ua_sess, ua_event); | |
465 | if (ret < 0) { | |
466 | goto error; | |
467 | } | |
468 | } | |
469 | ||
5b4a0ec0 DG |
470 | error: |
471 | return ret; | |
91d76f53 | 472 | } |
48842b30 DG |
473 | |
474 | /* | |
475 | * Alloc new UST app session. | |
476 | */ | |
421cb601 | 477 | static struct ust_app_session *alloc_ust_app_session(void) |
48842b30 DG |
478 | { |
479 | struct ust_app_session *ua_sess; | |
480 | ||
421cb601 | 481 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
482 | ua_sess = zmalloc(sizeof(struct ust_app_session)); |
483 | if (ua_sess == NULL) { | |
484 | PERROR("malloc"); | |
485 | goto error; | |
486 | } | |
487 | ||
48842b30 DG |
488 | ua_sess->handle = -1; |
489 | ua_sess->channels = hashtable_new_str(0); | |
48842b30 DG |
490 | |
491 | return ua_sess; | |
492 | ||
493 | error: | |
494 | return NULL; | |
495 | } | |
496 | ||
421cb601 DG |
497 | /* |
498 | * Alloc new UST app channel. | |
499 | */ | |
284d8f55 DG |
500 | static struct ust_app_channel *alloc_ust_app_channel(char *name, |
501 | struct lttng_ust_channel *attr) | |
48842b30 DG |
502 | { |
503 | struct ust_app_channel *ua_chan; | |
504 | ||
421cb601 | 505 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
506 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); |
507 | if (ua_chan == NULL) { | |
508 | PERROR("malloc"); | |
509 | goto error; | |
510 | } | |
511 | ||
284d8f55 | 512 | /* Setup channel name */ |
48842b30 DG |
513 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); |
514 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
284d8f55 | 515 | |
8535a6d9 | 516 | ua_chan->enabled = 1; |
48842b30 | 517 | ua_chan->handle = -1; |
48842b30 | 518 | ua_chan->ctx = hashtable_new(0); |
48842b30 DG |
519 | ua_chan->events = hashtable_new_str(0); |
520 | hashtable_node_init(&ua_chan->node, (void *) ua_chan->name, | |
521 | strlen(ua_chan->name)); | |
522 | ||
284d8f55 DG |
523 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); |
524 | ||
525 | /* Copy attributes */ | |
526 | if (attr) { | |
527 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
528 | } | |
529 | ||
48842b30 DG |
530 | DBG3("UST app channel %s allocated", ua_chan->name); |
531 | ||
532 | return ua_chan; | |
533 | ||
534 | error: | |
535 | return NULL; | |
536 | } | |
537 | ||
421cb601 DG |
538 | /* |
539 | * Alloc new UST app event. | |
540 | */ | |
284d8f55 DG |
541 | static struct ust_app_event *alloc_ust_app_event(char *name, |
542 | struct lttng_ust_event *attr) | |
48842b30 DG |
543 | { |
544 | struct ust_app_event *ua_event; | |
545 | ||
421cb601 | 546 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
547 | ua_event = zmalloc(sizeof(struct ust_app_event)); |
548 | if (ua_event == NULL) { | |
549 | PERROR("malloc"); | |
550 | goto error; | |
551 | } | |
552 | ||
8535a6d9 | 553 | ua_event->enabled = 1; |
48842b30 DG |
554 | strncpy(ua_event->name, name, sizeof(ua_event->name)); |
555 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
556 | ua_event->ctx = hashtable_new(0); | |
557 | hashtable_node_init(&ua_event->node, (void *) ua_event->name, | |
558 | strlen(ua_event->name)); | |
559 | ||
284d8f55 DG |
560 | /* Copy attributes */ |
561 | if (attr) { | |
562 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
563 | } | |
564 | ||
48842b30 DG |
565 | DBG3("UST app event %s allocated", ua_event->name); |
566 | ||
567 | return ua_event; | |
568 | ||
569 | error: | |
570 | return NULL; | |
571 | } | |
572 | ||
5b4a0ec0 DG |
573 | /* |
574 | * Copy data between an UST app event and a LTT event. | |
575 | */ | |
421cb601 | 576 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
577 | struct ltt_ust_event *uevent) |
578 | { | |
579 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); | |
580 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
581 | ||
5b4a0ec0 DG |
582 | /* Copy event attributes */ |
583 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
584 | ||
48842b30 DG |
585 | /* TODO: support copy context */ |
586 | } | |
587 | ||
5b4a0ec0 DG |
588 | /* |
589 | * Copy data between an UST app channel and a LTT channel. | |
590 | */ | |
421cb601 | 591 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
592 | struct ltt_ust_channel *uchan) |
593 | { | |
594 | struct cds_lfht_iter iter; | |
5b4a0ec0 | 595 | struct cds_lfht_node *ua_event_node; |
48842b30 DG |
596 | struct ltt_ust_event *uevent; |
597 | struct ust_app_event *ua_event; | |
598 | ||
421cb601 | 599 | DBG2("Shadow copy of UST app channel %s", ua_chan->name); |
48842b30 DG |
600 | |
601 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
602 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
603 | /* Copy event attributes */ |
604 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 DG |
605 | |
606 | /* TODO: support copy context */ | |
607 | ||
421cb601 | 608 | /* Copy all events from ltt ust channel to ust app channel */ |
5b4a0ec0 | 609 | cds_lfht_for_each_entry(uchan->events, &iter, uevent, node) { |
ba767faf MD |
610 | struct cds_lfht_iter uiter; |
611 | ||
48842b30 | 612 | ua_event_node = hashtable_lookup(ua_chan->events, |
ba767faf MD |
613 | (void *) uevent->attr.name, strlen(uevent->attr.name), |
614 | &uiter); | |
48842b30 | 615 | if (ua_event_node == NULL) { |
421cb601 | 616 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 617 | uevent->attr.name); |
284d8f55 | 618 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 619 | if (ua_event == NULL) { |
5b4a0ec0 | 620 | continue; |
48842b30 | 621 | } |
421cb601 | 622 | shadow_copy_event(ua_event, uevent); |
48842b30 | 623 | hashtable_add_unique(ua_chan->events, &ua_event->node); |
48842b30 | 624 | } |
48842b30 DG |
625 | } |
626 | ||
421cb601 | 627 | DBG3("Shadow copy channel done"); |
48842b30 DG |
628 | } |
629 | ||
5b4a0ec0 DG |
630 | /* |
631 | * Copy data between a UST app session and a regular LTT session. | |
632 | */ | |
421cb601 | 633 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
477d7741 MD |
634 | struct ltt_ust_session *usess, |
635 | struct ust_app *app) | |
48842b30 | 636 | { |
5b4a0ec0 | 637 | struct cds_lfht_node *ua_chan_node; |
48842b30 DG |
638 | struct cds_lfht_iter iter; |
639 | struct ltt_ust_channel *uchan; | |
640 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
641 | time_t rawtime; |
642 | struct tm *timeinfo; | |
643 | char datetime[16]; | |
644 | int ret; | |
645 | ||
646 | /* Get date and time for unique app path */ | |
647 | time(&rawtime); | |
648 | timeinfo = localtime(&rawtime); | |
649 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 650 | |
421cb601 | 651 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 DG |
652 | |
653 | ua_sess->uid = usess->uid; | |
654 | ||
477d7741 MD |
655 | ret = snprintf(ua_sess->path, PATH_MAX, |
656 | "%s/%s-%d-%s", | |
657 | usess->pathname, app->name, app->key.pid, | |
658 | datetime); | |
659 | if (ret < 0) { | |
660 | PERROR("asprintf UST shadow copy session"); | |
661 | /* TODO: We cannot return an error from here.. */ | |
662 | assert(0); | |
663 | } | |
664 | ||
48842b30 DG |
665 | /* TODO: support all UST domain */ |
666 | ||
667 | /* Iterate over all channels in global domain. */ | |
5b4a0ec0 DG |
668 | cds_lfht_for_each_entry(usess->domain_global.channels, &iter, |
669 | uchan, node) { | |
ba767faf MD |
670 | struct cds_lfht_iter uiter; |
671 | ||
48842b30 | 672 | ua_chan_node = hashtable_lookup(ua_sess->channels, |
ba767faf MD |
673 | (void *)uchan->name, strlen(uchan->name), |
674 | &uiter); | |
5b4a0ec0 DG |
675 | if (ua_chan_node != NULL) { |
676 | continue; | |
677 | } | |
421cb601 | 678 | |
5b4a0ec0 DG |
679 | DBG2("Channel %s not found on shadow session copy, creating it", |
680 | uchan->name); | |
681 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
682 | if (ua_chan == NULL) { | |
683 | /* malloc failed... continuing */ | |
684 | continue; | |
48842b30 DG |
685 | } |
686 | ||
5b4a0ec0 DG |
687 | shadow_copy_channel(ua_chan, uchan); |
688 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
48842b30 DG |
689 | } |
690 | } | |
691 | ||
78f0bacd DG |
692 | /* |
693 | * Lookup sesison wrapper. | |
694 | */ | |
84cd17c6 MD |
695 | static |
696 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
697 | struct ust_app *app, struct cds_lfht_iter *iter) | |
698 | { | |
699 | /* Get right UST app session from app */ | |
700 | (void) hashtable_lookup(app->sessions, | |
701 | (void *) ((unsigned long) usess->uid), sizeof(void *), | |
702 | iter); | |
703 | } | |
704 | ||
421cb601 DG |
705 | /* |
706 | * Return ust app session from the app session hashtable using the UST session | |
707 | * uid. | |
708 | */ | |
48842b30 DG |
709 | static struct ust_app_session *lookup_session_by_app( |
710 | struct ltt_ust_session *usess, struct ust_app *app) | |
711 | { | |
712 | struct cds_lfht_iter iter; | |
713 | struct cds_lfht_node *node; | |
714 | ||
84cd17c6 MD |
715 | __lookup_session_by_app(usess, app, &iter); |
716 | node = hashtable_iter_get_node(&iter); | |
48842b30 DG |
717 | if (node == NULL) { |
718 | goto error; | |
719 | } | |
720 | ||
721 | return caa_container_of(node, struct ust_app_session, node); | |
722 | ||
723 | error: | |
724 | return NULL; | |
725 | } | |
726 | ||
421cb601 DG |
727 | /* |
728 | * Create a UST session onto the tracer of app and add it the session | |
729 | * hashtable. | |
730 | * | |
731 | * Return ust app session or NULL on error. | |
732 | */ | |
733 | static struct ust_app_session *create_ust_app_session( | |
734 | struct ltt_ust_session *usess, struct ust_app *app) | |
735 | { | |
736 | int ret; | |
737 | struct ust_app_session *ua_sess; | |
738 | ||
739 | ua_sess = lookup_session_by_app(usess, app); | |
740 | if (ua_sess == NULL) { | |
741 | DBG2("UST app pid: %d session uid %d not found, creating it", | |
742 | app->key.pid, usess->uid); | |
743 | ua_sess = alloc_ust_app_session(); | |
744 | if (ua_sess == NULL) { | |
745 | /* Only malloc can failed so something is really wrong */ | |
746 | goto error; | |
747 | } | |
477d7741 | 748 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
749 | } |
750 | ||
751 | if (ua_sess->handle == -1) { | |
752 | ret = ustctl_create_session(app->key.sock); | |
753 | if (ret < 0) { | |
754 | ERR("Error creating session for app pid %d, sock %d", | |
755 | app->key.pid, app->key.sock); | |
756 | /* TODO: free() ua_sess */ | |
757 | goto error; | |
758 | } | |
759 | ||
760 | DBG2("UST app ustctl create session handle %d", ret); | |
761 | ua_sess->handle = ret; | |
762 | ||
763 | /* Add ust app session to app's HT */ | |
764 | hashtable_node_init(&ua_sess->node, | |
765 | (void *)((unsigned long) ua_sess->uid), sizeof(void *)); | |
766 | hashtable_add_unique(app->sessions, &ua_sess->node); | |
767 | ||
768 | DBG2("UST app session created successfully with handle %d", ret); | |
769 | } | |
770 | ||
771 | return ua_sess; | |
772 | ||
773 | error: | |
774 | return NULL; | |
775 | } | |
776 | ||
edb67388 DG |
777 | /* |
778 | * Enable on the tracer side a ust app event for the session and channel. | |
779 | */ | |
780 | static | |
781 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 782 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
783 | { |
784 | int ret; | |
785 | ||
786 | ret = enable_ust_event(app, ua_sess, ua_event); | |
787 | if (ret < 0) { | |
788 | goto error; | |
789 | } | |
790 | ||
791 | ua_event->enabled = 1; | |
792 | ||
793 | error: | |
794 | return ret; | |
795 | } | |
796 | ||
9730260e DG |
797 | /* |
798 | * Disable on the tracer side a ust app event for the session and channel. | |
799 | */ | |
800 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
801 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event, | |
802 | struct ust_app *app) | |
803 | { | |
804 | int ret; | |
805 | ||
806 | ret = disable_ust_event(app, ua_sess, ua_event); | |
807 | if (ret < 0) { | |
808 | goto error; | |
809 | } | |
810 | ||
811 | ua_event->enabled = 0; | |
812 | ||
813 | error: | |
814 | return ret; | |
815 | } | |
816 | ||
78f0bacd DG |
817 | /* |
818 | * Lookup ust app channel for session and disable it on the tracer side. | |
819 | */ | |
8535a6d9 DG |
820 | static |
821 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
822 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 823 | { |
8535a6d9 | 824 | int ret; |
78f0bacd DG |
825 | |
826 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
827 | if (ret < 0) { | |
828 | goto error; | |
829 | } | |
830 | ||
8535a6d9 DG |
831 | ua_chan->enabled = 0; |
832 | ||
78f0bacd DG |
833 | error: |
834 | return ret; | |
835 | } | |
836 | ||
837 | /* | |
838 | * Lookup ust app channel for session and enable it on the tracer side. | |
839 | */ | |
840 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
841 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
842 | { | |
843 | int ret = 0; | |
844 | struct cds_lfht_iter iter; | |
845 | struct cds_lfht_node *ua_chan_node; | |
846 | struct ust_app_channel *ua_chan; | |
847 | ||
848 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
849 | (void *)uchan->name, strlen(uchan->name), &iter); | |
850 | if (ua_chan_node == NULL) { | |
851 | DBG2("Unable to find channel %s in ust session uid %u", | |
852 | uchan->name, ua_sess->uid); | |
853 | goto error; | |
854 | } | |
855 | ||
856 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
857 | ||
858 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
859 | if (ret < 0) { | |
860 | goto error; | |
861 | } | |
862 | ||
863 | error: | |
864 | return ret; | |
865 | } | |
866 | ||
284d8f55 | 867 | /* |
5b4a0ec0 | 868 | * Create UST app channel and create it on the tracer. |
284d8f55 | 869 | */ |
5b4a0ec0 DG |
870 | static struct ust_app_channel *create_ust_app_channel( |
871 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
872 | struct ust_app *app) | |
873 | { | |
874 | int ret = 0; | |
875 | struct cds_lfht_iter iter; | |
876 | struct cds_lfht_node *ua_chan_node; | |
877 | struct ust_app_channel *ua_chan; | |
878 | ||
879 | /* Lookup channel in the ust app session */ | |
880 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
881 | (void *)uchan->name, strlen(uchan->name), &iter); | |
882 | if (ua_chan_node == NULL) { | |
883 | DBG2("Unable to find channel %s in ust session uid %u", | |
884 | uchan->name, ua_sess->uid); | |
885 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
886 | if (ua_chan == NULL) { | |
887 | goto error; | |
888 | } | |
889 | shadow_copy_channel(ua_chan, uchan); | |
890 | ||
891 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
892 | } else { | |
893 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
894 | } | |
895 | ||
896 | ret = create_ust_channel(app, ua_sess, ua_chan); | |
897 | if (ret < 0) { | |
898 | goto error; | |
899 | } | |
900 | ||
901 | return ua_chan; | |
902 | ||
903 | error: | |
904 | return NULL; | |
905 | } | |
906 | ||
907 | /* | |
908 | * Create UST app event and create it on the tracer side. | |
909 | */ | |
edb67388 DG |
910 | static |
911 | int create_ust_app_event(struct ust_app_session *ua_sess, | |
912 | struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent, | |
913 | struct ust_app *app) | |
284d8f55 | 914 | { |
edb67388 | 915 | int ret = 0; |
5b4a0ec0 DG |
916 | struct cds_lfht_iter iter; |
917 | struct cds_lfht_node *ua_event_node; | |
918 | struct ust_app_event *ua_event; | |
284d8f55 | 919 | |
5b4a0ec0 DG |
920 | /* Get event node */ |
921 | ua_event_node = hashtable_lookup(ua_chan->events, | |
922 | (void *)uevent->attr.name, strlen(uevent->attr.name), &iter); | |
edb67388 DG |
923 | if (ua_event_node != NULL) { |
924 | ERR("UST app event %s already exist. Stopping creation.", | |
925 | uevent->attr.name); | |
926 | goto end; | |
927 | } | |
5b4a0ec0 | 928 | |
edb67388 DG |
929 | /* Does not exist so create one */ |
930 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
931 | if (ua_event == NULL) { | |
932 | /* Only malloc can failed so something is really wrong */ | |
933 | ret = -ENOMEM; | |
934 | goto error; | |
5b4a0ec0 | 935 | } |
edb67388 | 936 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 937 | |
edb67388 | 938 | /* Create it on the tracer side */ |
5b4a0ec0 | 939 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 940 | if (ret < 0) { |
edb67388 | 941 | delete_ust_app_event(app->key.sock, ua_event); |
284d8f55 DG |
942 | goto error; |
943 | } | |
944 | ||
8535a6d9 DG |
945 | ua_event->enabled = 1; |
946 | ||
edb67388 | 947 | hashtable_add_unique(ua_chan->events, &ua_event->node); |
284d8f55 | 948 | |
edb67388 | 949 | end: |
5b4a0ec0 | 950 | error: |
edb67388 | 951 | return ret; |
5b4a0ec0 DG |
952 | } |
953 | ||
954 | /* | |
955 | * Create UST metadata and open it on the tracer side. | |
956 | */ | |
957 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
958 | char *pathname, struct ust_app *app) | |
959 | { | |
960 | int ret = 0; | |
961 | ||
962 | if (ua_sess->metadata == NULL) { | |
963 | /* Allocate UST metadata */ | |
964 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
965 | if (ua_sess->metadata == NULL) { | |
966 | ERR("UST app session %d creating metadata failed", | |
967 | ua_sess->handle); | |
968 | goto error; | |
969 | } | |
970 | ||
971 | ret = open_ust_metadata(app, ua_sess); | |
972 | if (ret < 0) { | |
973 | goto error; | |
974 | } | |
975 | ||
976 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
977 | } | |
978 | ||
979 | /* Open UST metadata stream */ | |
980 | if (ua_sess->metadata->stream_obj == NULL) { | |
981 | ret = create_ust_stream(app, ua_sess); | |
982 | if (ret < 0) { | |
983 | goto error; | |
984 | } | |
985 | ||
477d7741 | 986 | ret = mkdir(ua_sess->path, S_IRWXU | S_IRWXG); |
5b4a0ec0 DG |
987 | if (ret < 0) { |
988 | PERROR("mkdir UST metadata"); | |
989 | goto error; | |
990 | } | |
991 | ||
477d7741 MD |
992 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
993 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
994 | if (ret < 0) { |
995 | PERROR("asprintf UST create stream"); | |
996 | goto error; | |
997 | } | |
998 | ||
999 | DBG2("UST metadata stream object created for app pid %d", | |
1000 | app->key.pid); | |
1001 | } else { | |
1002 | ERR("Attempting to create stream without metadata opened"); | |
1003 | goto error; | |
1004 | } | |
1005 | ||
1006 | return 0; | |
1007 | ||
1008 | error: | |
1009 | return -1; | |
1010 | } | |
1011 | ||
1012 | /* | |
1013 | * Return pointer to traceable apps list. | |
1014 | */ | |
1015 | struct cds_lfht *ust_app_get_ht(void) | |
1016 | { | |
1017 | return ust_app_ht; | |
1018 | } | |
1019 | ||
1020 | /* | |
1021 | * Return ust app pointer or NULL if not found. | |
1022 | */ | |
1023 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
1024 | { | |
1025 | struct cds_lfht_node *node; | |
1026 | struct cds_lfht_iter iter; | |
1027 | ||
1028 | rcu_read_lock(); | |
1029 | node = hashtable_lookup(ust_app_ht, | |
1030 | (void *)((unsigned long) pid), sizeof(void *), &iter); | |
1031 | if (node == NULL) { | |
1032 | DBG2("UST app no found with pid %d", pid); | |
1033 | goto error; | |
1034 | } | |
1035 | rcu_read_unlock(); | |
1036 | ||
1037 | DBG2("Found UST app by pid %d", pid); | |
1038 | ||
1039 | return caa_container_of(node, struct ust_app, node); | |
1040 | ||
1041 | error: | |
1042 | rcu_read_unlock(); | |
1043 | return NULL; | |
1044 | } | |
1045 | ||
1046 | /* | |
1047 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
1048 | * add it to the global traceable app list. | |
1049 | * | |
0df502fd MD |
1050 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
1051 | * bitness is not supported. | |
5b4a0ec0 DG |
1052 | */ |
1053 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
1054 | { | |
1055 | struct ust_app *lta; | |
1056 | ||
7753dea8 MD |
1057 | if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL) |
1058 | || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) { | |
f943b0fb | 1059 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1060 | "%d-bit long, but no consumerd for this long size is available.\n", |
1061 | msg->name, msg->pid, msg->bits_per_long); | |
88ff5b7f | 1062 | close(sock); |
0df502fd MD |
1063 | return -EINVAL; |
1064 | } | |
5b4a0ec0 DG |
1065 | lta = zmalloc(sizeof(struct ust_app)); |
1066 | if (lta == NULL) { | |
1067 | PERROR("malloc"); | |
1068 | return -ENOMEM; | |
1069 | } | |
1070 | ||
1071 | lta->ppid = msg->ppid; | |
1072 | lta->uid = msg->uid; | |
1073 | lta->gid = msg->gid; | |
7753dea8 | 1074 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1075 | lta->v_major = msg->major; |
1076 | lta->v_minor = msg->minor; | |
1077 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1078 | lta->name[16] = '\0'; | |
1079 | lta->sessions = hashtable_new(0); | |
1080 | ||
1081 | /* Set key map */ | |
1082 | lta->key.pid = msg->pid; | |
1083 | hashtable_node_init(<a->node, (void *)((unsigned long)lta->key.pid), | |
1084 | sizeof(void *)); | |
1085 | lta->key.sock = sock; | |
1086 | hashtable_node_init(<a->key.node, (void *)((unsigned long)lta->key.sock), | |
1087 | sizeof(void *)); | |
1088 | ||
1089 | rcu_read_lock(); | |
1090 | hashtable_add_unique(ust_app_sock_key_map, <a->key.node); | |
1091 | hashtable_add_unique(ust_app_ht, <a->node); | |
1092 | rcu_read_unlock(); | |
1093 | ||
1094 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
1095 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, | |
1096 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
1097 | ||
1098 | return 0; | |
1099 | } | |
1100 | ||
1101 | /* | |
1102 | * Unregister app by removing it from the global traceable app list and freeing | |
1103 | * the data struct. | |
1104 | * | |
1105 | * The socket is already closed at this point so no close to sock. | |
1106 | */ | |
1107 | void ust_app_unregister(int sock) | |
1108 | { | |
1109 | struct ust_app *lta; | |
1110 | struct cds_lfht_node *node; | |
1111 | struct cds_lfht_iter iter; | |
525b0740 | 1112 | int ret; |
5b4a0ec0 DG |
1113 | |
1114 | rcu_read_lock(); | |
1115 | lta = find_app_by_sock(sock); | |
1116 | if (lta == NULL) { | |
1117 | ERR("Unregister app sock %d not found!", sock); | |
1118 | goto error; | |
1119 | } | |
1120 | ||
1121 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
1122 | ||
1123 | /* Get the node reference for a call_rcu */ | |
1124 | node = hashtable_lookup(ust_app_ht, | |
1125 | (void *)((unsigned long) lta->key.pid), sizeof(void *), &iter); | |
1126 | if (node == NULL) { | |
1127 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
1128 | goto error; | |
1129 | } | |
284d8f55 | 1130 | |
525b0740 MD |
1131 | ret = hashtable_del(ust_app_ht, &iter); |
1132 | assert(!ret); | |
5b4a0ec0 | 1133 | call_rcu(&node->head, delete_ust_app_rcu); |
284d8f55 | 1134 | error: |
5b4a0ec0 DG |
1135 | rcu_read_unlock(); |
1136 | return; | |
284d8f55 DG |
1137 | } |
1138 | ||
1139 | /* | |
5b4a0ec0 | 1140 | * Return traceable_app_count |
284d8f55 | 1141 | */ |
5b4a0ec0 | 1142 | unsigned long ust_app_list_count(void) |
284d8f55 | 1143 | { |
5b4a0ec0 | 1144 | unsigned long count; |
284d8f55 | 1145 | |
5b4a0ec0 DG |
1146 | rcu_read_lock(); |
1147 | count = hashtable_get_count(ust_app_ht); | |
1148 | rcu_read_unlock(); | |
284d8f55 | 1149 | |
5b4a0ec0 | 1150 | return count; |
284d8f55 DG |
1151 | } |
1152 | ||
5b4a0ec0 DG |
1153 | /* |
1154 | * Fill events array with all events name of all registered apps. | |
1155 | */ | |
1156 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1157 | { |
5b4a0ec0 DG |
1158 | int ret, handle; |
1159 | size_t nbmem, count = 0; | |
421cb601 | 1160 | struct cds_lfht_iter iter; |
5b4a0ec0 DG |
1161 | struct ust_app *app; |
1162 | struct lttng_event *tmp; | |
421cb601 | 1163 | |
5b4a0ec0 DG |
1164 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1165 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1166 | if (tmp == NULL) { | |
1167 | PERROR("zmalloc ust app events"); | |
1168 | ret = -ENOMEM; | |
421cb601 DG |
1169 | goto error; |
1170 | } | |
1171 | ||
5b4a0ec0 | 1172 | rcu_read_lock(); |
421cb601 | 1173 | |
5b4a0ec0 DG |
1174 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
1175 | handle = ustctl_tracepoint_list(app->key.sock); | |
1176 | if (handle < 0) { | |
1177 | ERR("UST app list events getting handle failed for app pid %d", | |
1178 | app->key.pid); | |
1179 | continue; | |
1180 | } | |
421cb601 | 1181 | |
5b4a0ec0 DG |
1182 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, |
1183 | tmp[count].name)) != -ENOENT) { | |
1184 | if (count > nbmem) { | |
1185 | DBG2("Reallocating event list from %zu to %zu bytes", nbmem, | |
1186 | nbmem + UST_APP_EVENT_LIST_SIZE); | |
1187 | nbmem += UST_APP_EVENT_LIST_SIZE; | |
1188 | tmp = realloc(tmp, nbmem); | |
1189 | if (tmp == NULL) { | |
1190 | PERROR("realloc ust app events"); | |
1191 | ret = -ENOMEM; | |
1192 | goto rcu_error; | |
1193 | } | |
1194 | } | |
421cb601 | 1195 | |
5b4a0ec0 DG |
1196 | tmp[count].type = LTTNG_UST_TRACEPOINT; |
1197 | tmp[count].pid = app->key.pid; | |
1198 | tmp[count].enabled = -1; | |
1199 | count++; | |
421cb601 | 1200 | } |
421cb601 DG |
1201 | } |
1202 | ||
5b4a0ec0 DG |
1203 | ret = count; |
1204 | *events = tmp; | |
421cb601 | 1205 | |
5b4a0ec0 | 1206 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1207 | |
5b4a0ec0 DG |
1208 | rcu_error: |
1209 | rcu_read_unlock(); | |
421cb601 | 1210 | error: |
5b4a0ec0 | 1211 | return ret; |
421cb601 DG |
1212 | } |
1213 | ||
5b4a0ec0 DG |
1214 | /* |
1215 | * Free and clean all traceable apps of the global list. | |
1216 | */ | |
1217 | void ust_app_clean_list(void) | |
421cb601 | 1218 | { |
5b4a0ec0 | 1219 | int ret; |
5b4a0ec0 DG |
1220 | struct cds_lfht_iter iter; |
1221 | struct ust_app *app; | |
421cb601 | 1222 | |
5b4a0ec0 | 1223 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1224 | |
5b4a0ec0 | 1225 | rcu_read_lock(); |
421cb601 | 1226 | |
778ca3dd | 1227 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
5b4a0ec0 | 1228 | ret = hashtable_del(ust_app_ht, &iter); |
525b0740 | 1229 | assert(!ret); |
0d5d001d | 1230 | call_rcu(&iter.node->head, delete_ust_app_rcu); |
421cb601 DG |
1231 | } |
1232 | ||
5b4a0ec0 DG |
1233 | hashtable_destroy(ust_app_ht); |
1234 | hashtable_destroy(ust_app_sock_key_map); | |
421cb601 | 1235 | |
5b4a0ec0 DG |
1236 | rcu_read_unlock(); |
1237 | } | |
1238 | ||
1239 | /* | |
1240 | * Init UST app hash table. | |
1241 | */ | |
1242 | void ust_app_ht_alloc(void) | |
1243 | { | |
1244 | ust_app_ht = hashtable_new(0); | |
1245 | ust_app_sock_key_map = hashtable_new(0); | |
421cb601 DG |
1246 | } |
1247 | ||
78f0bacd DG |
1248 | /* |
1249 | * For a specific UST session, disable the channel for all registered apps. | |
1250 | */ | |
35a9059d | 1251 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1252 | struct ltt_ust_channel *uchan) |
1253 | { | |
1254 | int ret = 0; | |
1255 | struct cds_lfht_iter iter; | |
8535a6d9 | 1256 | struct cds_lfht_node *ua_chan_node; |
78f0bacd DG |
1257 | struct ust_app *app; |
1258 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1259 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1260 | |
1261 | if (usess == NULL || uchan == NULL) { | |
1262 | ERR("Disabling UST global channel with NULL values"); | |
1263 | ret = -1; | |
1264 | goto error; | |
1265 | } | |
1266 | ||
8535a6d9 | 1267 | DBG2("UST app disabling channel %s from global domain for session uid %d", |
78f0bacd DG |
1268 | uchan->name, usess->uid); |
1269 | ||
1270 | rcu_read_lock(); | |
1271 | ||
1272 | /* For every registered applications */ | |
1273 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1274 | ua_sess = lookup_session_by_app(usess, app); | |
1275 | if (ua_sess == NULL) { | |
1276 | continue; | |
1277 | } | |
1278 | ||
8535a6d9 DG |
1279 | /* Get channel */ |
1280 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
1281 | (void *)uchan->name, strlen(uchan->name), &iter); | |
1282 | /* If the session if found for the app, the channel must be there */ | |
1283 | assert(ua_chan_node); | |
1284 | ||
1285 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1286 | /* The channel must not be already disabled */ | |
1287 | assert(ua_chan->enabled == 1); | |
1288 | ||
1289 | /* Disable channel onto application */ | |
1290 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1291 | if (ret < 0) { |
1292 | /* XXX: We might want to report this error at some point... */ | |
1293 | continue; | |
1294 | } | |
1295 | } | |
1296 | ||
1297 | rcu_read_unlock(); | |
1298 | ||
1299 | error: | |
1300 | return ret; | |
1301 | } | |
1302 | ||
1303 | /* | |
1304 | * For a specific UST session, enable the channel for all registered apps. | |
1305 | */ | |
35a9059d | 1306 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1307 | struct ltt_ust_channel *uchan) |
1308 | { | |
1309 | int ret = 0; | |
1310 | struct cds_lfht_iter iter; | |
1311 | struct ust_app *app; | |
1312 | struct ust_app_session *ua_sess; | |
1313 | ||
1314 | if (usess == NULL || uchan == NULL) { | |
1315 | ERR("Adding UST global channel to NULL values"); | |
1316 | ret = -1; | |
1317 | goto error; | |
1318 | } | |
1319 | ||
1320 | DBG2("UST app enabling channel %s to global domain for session uid %d", | |
1321 | uchan->name, usess->uid); | |
1322 | ||
1323 | rcu_read_lock(); | |
1324 | ||
1325 | /* For every registered applications */ | |
1326 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1327 | ua_sess = lookup_session_by_app(usess, app); | |
1328 | if (ua_sess == NULL) { | |
1329 | continue; | |
1330 | } | |
1331 | ||
1332 | /* Enable channel onto application */ | |
1333 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1334 | if (ret < 0) { | |
1335 | /* XXX: We might want to report this error at some point... */ | |
1336 | continue; | |
1337 | } | |
1338 | } | |
1339 | ||
1340 | rcu_read_unlock(); | |
1341 | ||
1342 | error: | |
1343 | return ret; | |
1344 | } | |
1345 | ||
b0a40d28 DG |
1346 | /* |
1347 | * Disable an event in a channel and for a specific session. | |
1348 | */ | |
35a9059d DG |
1349 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
1350 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
1351 | { |
1352 | int ret = 0; | |
1353 | struct cds_lfht_iter iter, uiter; | |
1354 | struct cds_lfht_node *ua_chan_node, *ua_event_node; | |
1355 | struct ust_app *app; | |
1356 | struct ust_app_session *ua_sess; | |
1357 | struct ust_app_channel *ua_chan; | |
1358 | struct ust_app_event *ua_event; | |
1359 | ||
1360 | DBG("UST app disabling event %s for all apps in channel " | |
35a9059d | 1361 | "%s for session uid %d", uevent->attr.name, uchan->name, usess->uid); |
b0a40d28 DG |
1362 | |
1363 | rcu_read_lock(); | |
1364 | ||
1365 | /* For all registered applications */ | |
1366 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1367 | ua_sess = lookup_session_by_app(usess, app); | |
1368 | if (ua_sess == NULL) { | |
1369 | /* Next app */ | |
1370 | continue; | |
1371 | } | |
1372 | ||
1373 | /* Lookup channel in the ust app session */ | |
1374 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
1375 | (void *)uchan->name, strlen(uchan->name), &uiter); | |
1376 | if (ua_chan_node == NULL) { | |
1377 | DBG2("Channel %s not found in session uid %d for app pid %d." | |
1378 | "Skipping", uchan->name, usess->uid, app->key.pid); | |
1379 | continue; | |
1380 | } | |
1381 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1382 | ||
1383 | ua_event_node = hashtable_lookup(ua_chan->events, | |
35a9059d | 1384 | (void *)uevent->attr.name, strlen(uevent->attr.name), &uiter); |
b0a40d28 DG |
1385 | if (ua_event_node == NULL) { |
1386 | DBG2("Event %s not found in channel %s for app pid %d." | |
35a9059d | 1387 | "Skipping", uevent->attr.name, uchan->name, app->key.pid); |
b0a40d28 DG |
1388 | continue; |
1389 | } | |
1390 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1391 | ||
1392 | ret = disable_ust_app_event(ua_sess, ua_chan, ua_event, app); | |
1393 | if (ret < 0) { | |
1394 | /* XXX: Report error someday... */ | |
1395 | continue; | |
1396 | } | |
1397 | } | |
1398 | ||
1399 | rcu_read_unlock(); | |
1400 | ||
1401 | return ret; | |
1402 | } | |
1403 | ||
9730260e | 1404 | /* |
edb67388 | 1405 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
1406 | * registered apps. |
1407 | */ | |
35a9059d | 1408 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
1409 | struct ltt_ust_channel *uchan) |
1410 | { | |
1411 | int ret = 0; | |
1412 | struct cds_lfht_iter iter, uiter; | |
1413 | struct cds_lfht_node *ua_chan_node; | |
1414 | struct ust_app *app; | |
1415 | struct ust_app_session *ua_sess; | |
1416 | struct ust_app_channel *ua_chan; | |
1417 | struct ust_app_event *ua_event; | |
1418 | ||
1419 | DBG("UST app disabling all event for all apps in channel " | |
1420 | "%s for session uid %d", uchan->name, usess->uid); | |
1421 | ||
1422 | rcu_read_lock(); | |
1423 | ||
1424 | /* For all registered applications */ | |
1425 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1426 | ua_sess = lookup_session_by_app(usess, app); | |
edb67388 DG |
1427 | /* If ua_sess is NULL, there is a code flow error */ |
1428 | assert(ua_sess); | |
9730260e DG |
1429 | |
1430 | /* Lookup channel in the ust app session */ | |
edb67388 DG |
1431 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, |
1432 | strlen(uchan->name), &uiter); | |
1433 | /* If the channel is not found, there is a code flow error */ | |
1434 | assert(ua_chan_node); | |
1435 | ||
9730260e DG |
1436 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1437 | ||
1438 | /* Disable each events of channel */ | |
1439 | cds_lfht_for_each_entry(ua_chan->events, &uiter, ua_event, node) { | |
1440 | ret = disable_ust_app_event(ua_sess, ua_chan, ua_event, app); | |
1441 | if (ret < 0) { | |
1442 | /* XXX: Report error someday... */ | |
1443 | continue; | |
1444 | } | |
1445 | } | |
1446 | } | |
1447 | ||
1448 | rcu_read_unlock(); | |
1449 | ||
1450 | return ret; | |
1451 | } | |
1452 | ||
421cb601 | 1453 | /* |
5b4a0ec0 | 1454 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1455 | */ |
35a9059d | 1456 | int ust_app_create_channel_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1457 | struct ltt_ust_channel *uchan) |
1458 | { | |
1459 | int ret = 0; | |
1460 | struct cds_lfht_iter iter; | |
48842b30 DG |
1461 | struct ust_app *app; |
1462 | struct ust_app_session *ua_sess; | |
1463 | struct ust_app_channel *ua_chan; | |
1464 | ||
421cb601 DG |
1465 | if (usess == NULL || uchan == NULL) { |
1466 | ERR("Adding UST global channel to NULL values"); | |
1467 | ret = -1; | |
1468 | goto error; | |
1469 | } | |
1470 | ||
48842b30 DG |
1471 | DBG2("UST app adding channel %s to global domain for session uid %d", |
1472 | uchan->name, usess->uid); | |
1473 | ||
1474 | rcu_read_lock(); | |
421cb601 | 1475 | |
5b4a0ec0 DG |
1476 | /* For every registered applications */ |
1477 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
edb67388 DG |
1478 | /* |
1479 | * Create session on the tracer side and add it to app session HT. Note | |
1480 | * that if session exist, it will simply return a pointer to the ust | |
1481 | * app session. | |
1482 | */ | |
421cb601 | 1483 | ua_sess = create_ust_app_session(usess, app); |
509cbaf8 | 1484 | if (ua_sess == NULL) { |
5b4a0ec0 | 1485 | continue; |
48842b30 DG |
1486 | } |
1487 | ||
421cb601 DG |
1488 | /* Create channel onto application */ |
1489 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1490 | if (ua_chan == NULL) { | |
5b4a0ec0 | 1491 | continue; |
48842b30 | 1492 | } |
48842b30 | 1493 | } |
5b4a0ec0 | 1494 | |
48842b30 DG |
1495 | rcu_read_unlock(); |
1496 | ||
421cb601 | 1497 | error: |
48842b30 DG |
1498 | return ret; |
1499 | } | |
1500 | ||
5b4a0ec0 | 1501 | /* |
edb67388 | 1502 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 1503 | */ |
35a9059d | 1504 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1505 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1506 | { | |
1507 | int ret = 0; | |
edb67388 | 1508 | struct cds_lfht_iter iter, uiter; |
35a9059d | 1509 | struct cds_lfht_node *ua_chan_node, *ua_event_node; |
48842b30 DG |
1510 | struct ust_app *app; |
1511 | struct ust_app_session *ua_sess; | |
1512 | struct ust_app_channel *ua_chan; | |
1513 | struct ust_app_event *ua_event; | |
48842b30 | 1514 | |
edb67388 | 1515 | DBG("UST app enabling event %s for all apps for session uid %d", |
48842b30 DG |
1516 | uevent->attr.name, usess->uid); |
1517 | ||
edb67388 DG |
1518 | /* |
1519 | * NOTE: At this point, this function is called only if the session and | |
1520 | * channel passed are already created for all apps. and enabled on the | |
1521 | * tracer also. | |
1522 | */ | |
1523 | ||
48842b30 | 1524 | rcu_read_lock(); |
421cb601 DG |
1525 | |
1526 | /* For all registered applications */ | |
5b4a0ec0 | 1527 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
edb67388 DG |
1528 | ua_sess = lookup_session_by_app(usess, app); |
1529 | /* If ua_sess is NULL, there is a code flow error */ | |
1530 | assert(ua_sess); | |
ba767faf | 1531 | |
edb67388 DG |
1532 | /* Lookup channel in the ust app session */ |
1533 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, | |
1534 | strlen(uchan->name), &uiter); | |
1535 | /* If the channel is not found, there is a code flow error */ | |
1536 | assert(ua_chan_node); | |
1537 | ||
1538 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1539 | ||
35a9059d DG |
1540 | ua_event_node = hashtable_lookup(ua_sess->channels, |
1541 | (void*)uevent->attr.name, strlen(uevent->attr.name), &uiter); | |
1542 | if (ua_event_node == NULL) { | |
1543 | DBG3("UST app enable event %s not found. Skipping app", | |
1544 | uevent->attr.name); | |
1545 | continue; | |
1546 | } | |
1547 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1548 | ||
1549 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
1550 | if (ret < 0) { | |
1551 | /* XXX: Report error someday... */ | |
1552 | continue; | |
48842b30 | 1553 | } |
edb67388 DG |
1554 | } |
1555 | ||
1556 | rcu_read_unlock(); | |
1557 | ||
1558 | return ret; | |
1559 | } | |
1560 | ||
1561 | /* | |
1562 | * For a specific existing UST session and UST channel, creates the event for | |
1563 | * all registered apps. | |
1564 | */ | |
35a9059d | 1565 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
1566 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1567 | { | |
1568 | int ret = 0; | |
1569 | struct cds_lfht_iter iter, uiter; | |
1570 | struct cds_lfht_node *ua_chan_node; | |
1571 | struct ust_app *app; | |
1572 | struct ust_app_session *ua_sess; | |
1573 | struct ust_app_channel *ua_chan; | |
1574 | ||
1575 | DBG("UST app creating event %s for all apps for session uid %d", | |
1576 | uevent->attr.name, usess->uid); | |
1577 | ||
1578 | /* | |
1579 | * NOTE: At this point, this function is called only if the session and | |
1580 | * channel passed are already created for all apps. and enabled on the | |
1581 | * tracer also. | |
1582 | */ | |
1583 | ||
1584 | rcu_read_lock(); | |
1585 | ||
1586 | /* For all registered applications */ | |
1587 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1588 | ua_sess = lookup_session_by_app(usess, app); | |
1589 | /* If ua_sess is NULL, there is a code flow error */ | |
1590 | assert(ua_sess); | |
48842b30 DG |
1591 | |
1592 | /* Lookup channel in the ust app session */ | |
edb67388 DG |
1593 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, |
1594 | strlen(uchan->name), &uiter); | |
1595 | /* If the channel is not found, there is a code flow error */ | |
1596 | assert(ua_chan_node); | |
1597 | ||
48842b30 DG |
1598 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1599 | ||
edb67388 DG |
1600 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1601 | if (ret < 0) { | |
5b4a0ec0 | 1602 | continue; |
48842b30 | 1603 | } |
48842b30 | 1604 | } |
5b4a0ec0 | 1605 | |
48842b30 DG |
1606 | rcu_read_unlock(); |
1607 | ||
1608 | return ret; | |
1609 | } | |
1610 | ||
5b4a0ec0 DG |
1611 | /* |
1612 | * Start tracing for a specific UST session and app. | |
1613 | */ | |
421cb601 | 1614 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1615 | { |
1616 | int ret = 0; | |
1617 | struct cds_lfht_iter iter; | |
48842b30 DG |
1618 | struct ust_app_session *ua_sess; |
1619 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 1620 | struct ltt_ust_stream *ustream; |
7753dea8 | 1621 | int consumerd_fd; |
48842b30 | 1622 | |
421cb601 | 1623 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 1624 | |
509cbaf8 MD |
1625 | rcu_read_lock(); |
1626 | ||
421cb601 DG |
1627 | ua_sess = lookup_session_by_app(usess, app); |
1628 | if (ua_sess == NULL) { | |
509cbaf8 | 1629 | goto error_rcu_unlock; |
421cb601 | 1630 | } |
48842b30 | 1631 | |
aea829b3 DG |
1632 | /* Upon restart, we skip the setup, already done */ |
1633 | if (ua_sess->started) { | |
8be98f9a | 1634 | goto skip_setup; |
aea829b3 | 1635 | } |
8be98f9a | 1636 | |
421cb601 DG |
1637 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1638 | if (ret < 0) { | |
509cbaf8 | 1639 | goto error_rcu_unlock; |
421cb601 | 1640 | } |
48842b30 | 1641 | |
421cb601 | 1642 | /* For each channel */ |
5b4a0ec0 | 1643 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { |
421cb601 DG |
1644 | /* Create all streams */ |
1645 | while (1) { | |
5b4a0ec0 | 1646 | /* Create UST stream */ |
421cb601 DG |
1647 | ustream = zmalloc(sizeof(*ustream)); |
1648 | if (ustream == NULL) { | |
1649 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1650 | goto error_rcu_unlock; |
421cb601 | 1651 | } |
48842b30 | 1652 | |
421cb601 DG |
1653 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
1654 | &ustream->obj); | |
48842b30 | 1655 | if (ret < 0) { |
421cb601 DG |
1656 | /* Got all streams */ |
1657 | break; | |
48842b30 | 1658 | } |
421cb601 | 1659 | ustream->handle = ustream->obj->handle; |
48842b30 | 1660 | |
421cb601 DG |
1661 | /* Order is important */ |
1662 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
477d7741 MD |
1663 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", |
1664 | ua_sess->path, ua_chan->name, | |
1665 | ua_chan->streams.count++); | |
aba8e916 DG |
1666 | if (ret < 0) { |
1667 | PERROR("asprintf UST create stream"); | |
421cb601 | 1668 | continue; |
aba8e916 | 1669 | } |
421cb601 DG |
1670 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1671 | ustream->pathname); | |
1672 | } | |
421cb601 | 1673 | } |
aba8e916 | 1674 | |
7753dea8 MD |
1675 | switch (app->bits_per_long) { |
1676 | case 64: | |
1677 | consumerd_fd = ust_consumerd64_fd; | |
1678 | break; | |
1679 | case 32: | |
1680 | consumerd_fd = ust_consumerd32_fd; | |
1681 | break; | |
1682 | default: | |
1683 | ret = -EINVAL; | |
1684 | goto error_rcu_unlock; | |
1685 | } | |
aea829b3 | 1686 | |
421cb601 | 1687 | /* Setup UST consumer socket and send fds to it */ |
7753dea8 | 1688 | ret = ust_consumer_send_session(consumerd_fd, ua_sess); |
421cb601 | 1689 | if (ret < 0) { |
509cbaf8 | 1690 | goto error_rcu_unlock; |
421cb601 | 1691 | } |
8be98f9a | 1692 | ua_sess->started = 1; |
48842b30 | 1693 | |
8be98f9a | 1694 | skip_setup: |
421cb601 DG |
1695 | /* This start the UST tracing */ |
1696 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
1697 | if (ret < 0) { | |
1698 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 1699 | goto error_rcu_unlock; |
421cb601 | 1700 | } |
5b4a0ec0 | 1701 | |
509cbaf8 | 1702 | rcu_read_unlock(); |
48842b30 | 1703 | |
421cb601 DG |
1704 | /* Quiescent wait after starting trace */ |
1705 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 1706 | |
421cb601 | 1707 | return 0; |
48842b30 | 1708 | |
509cbaf8 MD |
1709 | error_rcu_unlock: |
1710 | rcu_read_unlock(); | |
421cb601 DG |
1711 | return -1; |
1712 | } | |
48842b30 | 1713 | |
8be98f9a MD |
1714 | /* |
1715 | * Stop tracing for a specific UST session and app. | |
1716 | */ | |
1717 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1718 | { | |
1719 | int ret = 0; | |
1720 | struct ust_app_session *ua_sess; | |
1721 | ||
1722 | DBG("Stopping tracing for ust app pid %d", app->key.pid); | |
1723 | ||
1724 | rcu_read_lock(); | |
1725 | ||
1726 | ua_sess = lookup_session_by_app(usess, app); | |
1727 | if (ua_sess == NULL) { | |
1728 | /* Only malloc can failed so something is really wrong */ | |
1729 | goto error_rcu_unlock; | |
1730 | } | |
1731 | ||
1732 | #if 0 /* only useful when periodical flush will be supported */ | |
1733 | /* need to keep a handle on shm in session for this. */ | |
1734 | /* Flush all buffers before stopping */ | |
1735 | ret = ustctl_flush_buffer(usess->sock, usess->metadata->obj); | |
1736 | if (ret < 0) { | |
1737 | ERR("UST metadata flush failed"); | |
1738 | } | |
1739 | ||
1740 | cds_list_for_each_entry(ustchan, &usess->channels.head, list) { | |
1741 | ret = ustctl_flush_buffer(usess->sock, ustchan->obj); | |
1742 | if (ret < 0) { | |
1743 | ERR("UST flush buffer error"); | |
1744 | } | |
1745 | } | |
1746 | #endif | |
1747 | ||
1748 | /* This inhibits UST tracing */ | |
1749 | ret = ustctl_stop_session(app->key.sock, ua_sess->handle); | |
1750 | if (ret < 0) { | |
1751 | ERR("Error stopping tracing for app pid: %d", app->key.pid); | |
1752 | goto error_rcu_unlock; | |
1753 | } | |
1754 | ||
1755 | rcu_read_unlock(); | |
1756 | ||
1757 | /* Quiescent wait after stopping trace */ | |
1758 | ustctl_wait_quiescent(app->key.sock); | |
1759 | ||
1760 | return 0; | |
1761 | ||
1762 | error_rcu_unlock: | |
1763 | rcu_read_unlock(); | |
1764 | return -1; | |
1765 | } | |
1766 | ||
84cd17c6 MD |
1767 | /* |
1768 | * Destroy a specific UST session in apps. | |
1769 | */ | |
1770 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1771 | { | |
1772 | struct ust_app_session *ua_sess; | |
1773 | struct lttng_ust_object_data obj; | |
1774 | struct cds_lfht_iter iter; | |
1775 | struct cds_lfht_node *node; | |
525b0740 | 1776 | int ret; |
84cd17c6 MD |
1777 | |
1778 | DBG("Destroy tracing for ust app pid %d", app->key.pid); | |
1779 | ||
1780 | rcu_read_lock(); | |
1781 | ||
1782 | __lookup_session_by_app(usess, app, &iter); | |
1783 | node = hashtable_iter_get_node(&iter); | |
1784 | if (node == NULL) { | |
1785 | /* Only malloc can failed so something is really wrong */ | |
1786 | goto error_rcu_unlock; | |
1787 | } | |
1788 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
525b0740 MD |
1789 | ret = hashtable_del(app->sessions, &iter); |
1790 | assert(!ret); | |
84cd17c6 MD |
1791 | delete_ust_app_session(app->key.sock, ua_sess); |
1792 | obj.handle = ua_sess->handle; | |
1793 | obj.shm_fd = -1; | |
1794 | obj.wait_fd = -1; | |
1795 | obj.memory_map_size = 0; | |
1796 | ustctl_release_object(app->key.sock, &obj); | |
1797 | ||
1798 | rcu_read_unlock(); | |
1799 | ||
1800 | /* Quiescent wait after stopping trace */ | |
1801 | ustctl_wait_quiescent(app->key.sock); | |
1802 | ||
1803 | return 0; | |
1804 | ||
1805 | error_rcu_unlock: | |
1806 | rcu_read_unlock(); | |
1807 | return -1; | |
1808 | } | |
1809 | ||
5b4a0ec0 DG |
1810 | /* |
1811 | * Start tracing for the UST session. | |
1812 | */ | |
421cb601 DG |
1813 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
1814 | { | |
1815 | int ret = 0; | |
1816 | struct cds_lfht_iter iter; | |
421cb601 | 1817 | struct ust_app *app; |
48842b30 | 1818 | |
421cb601 DG |
1819 | DBG("Starting all UST traces"); |
1820 | ||
1821 | rcu_read_lock(); | |
421cb601 | 1822 | |
5b4a0ec0 | 1823 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
421cb601 | 1824 | ret = ust_app_start_trace(usess, app); |
48842b30 | 1825 | if (ret < 0) { |
5b4a0ec0 DG |
1826 | /* Continue to next apps even on error */ |
1827 | continue; | |
48842b30 | 1828 | } |
48842b30 | 1829 | } |
5b4a0ec0 | 1830 | |
48842b30 DG |
1831 | rcu_read_unlock(); |
1832 | ||
1833 | return 0; | |
1834 | } | |
487cf67c | 1835 | |
8be98f9a MD |
1836 | /* |
1837 | * Start tracing for the UST session. | |
1838 | */ | |
1839 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
1840 | { | |
1841 | int ret = 0; | |
1842 | struct cds_lfht_iter iter; | |
1843 | struct ust_app *app; | |
1844 | ||
1845 | DBG("Stopping all UST traces"); | |
1846 | ||
1847 | rcu_read_lock(); | |
1848 | ||
1849 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1850 | ret = ust_app_stop_trace(usess, app); | |
1851 | if (ret < 0) { | |
1852 | /* Continue to next apps even on error */ | |
1853 | continue; | |
1854 | } | |
1855 | } | |
1856 | ||
1857 | rcu_read_unlock(); | |
1858 | ||
1859 | return 0; | |
1860 | } | |
1861 | ||
84cd17c6 MD |
1862 | /* |
1863 | * Destroy app UST session. | |
1864 | */ | |
1865 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
1866 | { | |
1867 | int ret = 0; | |
1868 | struct cds_lfht_iter iter; | |
1869 | struct ust_app *app; | |
1870 | ||
1871 | DBG("Destroy all UST traces"); | |
1872 | ||
1873 | rcu_read_lock(); | |
1874 | ||
1875 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1876 | ret = ust_app_destroy_trace(usess, app); | |
1877 | if (ret < 0) { | |
1878 | /* Continue to next apps even on error */ | |
1879 | continue; | |
1880 | } | |
1881 | } | |
1882 | ||
1883 | rcu_read_unlock(); | |
1884 | ||
1885 | return 0; | |
1886 | } | |
1887 | ||
5b4a0ec0 DG |
1888 | /* |
1889 | * Add channels/events from UST global domain to registered apps at sock. | |
1890 | */ | |
487cf67c DG |
1891 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
1892 | { | |
1893 | int ret = 0; | |
487cf67c | 1894 | struct cds_lfht_iter iter; |
487cf67c DG |
1895 | struct ust_app *app; |
1896 | struct ust_app_session *ua_sess; | |
1897 | struct ust_app_channel *ua_chan; | |
1898 | struct ust_app_event *ua_event; | |
1f3580c7 DG |
1899 | |
1900 | if (usess == NULL) { | |
5b4a0ec0 | 1901 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
1902 | goto error; |
1903 | } | |
1904 | ||
487cf67c DG |
1905 | DBG2("UST app global update for app sock %d for session uid %d", sock, |
1906 | usess->uid); | |
1907 | ||
284d8f55 DG |
1908 | rcu_read_lock(); |
1909 | ||
487cf67c DG |
1910 | app = find_app_by_sock(sock); |
1911 | if (app == NULL) { | |
1912 | ERR("Failed to update app sock %d", sock); | |
1913 | goto error; | |
1914 | } | |
1915 | ||
421cb601 | 1916 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 1917 | if (ua_sess == NULL) { |
487cf67c DG |
1918 | goto error; |
1919 | } | |
1920 | ||
284d8f55 DG |
1921 | /* |
1922 | * We can iterate safely here over all UST app session sicne the create ust | |
1923 | * app session above made a shadow copy of the UST global domain from the | |
1924 | * ltt ust session. | |
1925 | */ | |
1926 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { | |
1927 | ret = create_ust_channel(app, ua_sess, ua_chan); | |
1928 | if (ret < 0) { | |
1929 | /* FIXME: Should we quit here or continue... */ | |
1930 | continue; | |
487cf67c DG |
1931 | } |
1932 | ||
284d8f55 DG |
1933 | /* For each events */ |
1934 | cds_lfht_for_each_entry(ua_chan->events, &iter, ua_event, node) { | |
1935 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); | |
1936 | if (ret < 0) { | |
1937 | /* FIXME: Should we quit here or continue... */ | |
1938 | continue; | |
487cf67c | 1939 | } |
36dc12cc | 1940 | } |
487cf67c DG |
1941 | } |
1942 | ||
36dc12cc | 1943 | if (usess->start_trace) { |
421cb601 | 1944 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 1945 | if (ret < 0) { |
36dc12cc DG |
1946 | goto error; |
1947 | } | |
1948 | ||
36dc12cc DG |
1949 | DBG2("UST trace started for app pid %d", app->key.pid); |
1950 | } | |
1951 | ||
487cf67c DG |
1952 | error: |
1953 | rcu_read_unlock(); | |
1954 | return; | |
1955 | } |