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