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