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