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 | ||
247 | /* | |
5b4a0ec0 | 248 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 249 | */ |
5b4a0ec0 DG |
250 | static int open_ust_metadata(struct ust_app *app, |
251 | struct ust_app_session *ua_sess) | |
0177d773 | 252 | { |
5b4a0ec0 DG |
253 | int ret; |
254 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 255 | |
5b4a0ec0 DG |
256 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
257 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
258 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
259 | uattr.switch_timer_interval = | |
260 | ua_sess->metadata->attr.switch_timer_interval; | |
261 | uattr.read_timer_interval = | |
262 | ua_sess->metadata->attr.read_timer_interval; | |
263 | uattr.output = ua_sess->metadata->attr.output; | |
264 | ||
265 | /* UST tracer metadata creation */ | |
266 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
267 | &ua_sess->metadata->obj); | |
268 | if (ret < 0) { | |
269 | ERR("UST app open metadata failed for app pid:%d", | |
270 | app->key.pid); | |
f6a9efaa | 271 | goto error; |
0177d773 | 272 | } |
f6a9efaa DG |
273 | |
274 | error: | |
5b4a0ec0 | 275 | return ret; |
91d76f53 DG |
276 | } |
277 | ||
278 | /* | |
5b4a0ec0 | 279 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 280 | */ |
5b4a0ec0 DG |
281 | static int create_ust_stream(struct ust_app *app, |
282 | struct ust_app_session *ua_sess) | |
91d76f53 | 283 | { |
5b4a0ec0 | 284 | int ret; |
421cb601 | 285 | |
5b4a0ec0 DG |
286 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, |
287 | &ua_sess->metadata->stream_obj); | |
288 | if (ret < 0) { | |
289 | ERR("UST create metadata stream failed"); | |
421cb601 | 290 | goto error; |
91d76f53 | 291 | } |
421cb601 | 292 | |
421cb601 | 293 | error: |
5b4a0ec0 | 294 | return ret; |
91d76f53 DG |
295 | } |
296 | ||
b551a063 | 297 | /* |
5b4a0ec0 | 298 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 299 | */ |
5b4a0ec0 DG |
300 | static int create_ust_channel(struct ust_app *app, |
301 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 302 | { |
5b4a0ec0 | 303 | int ret; |
b551a063 | 304 | |
5b4a0ec0 DG |
305 | /* TODO: remove cast and use lttng-ust-abi.h */ |
306 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
307 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); | |
308 | if (ret < 0) { | |
309 | DBG("Error creating channel %s for app (pid: %d, sock: %d) " | |
310 | "and session handle %d with ret %d", | |
311 | ua_chan->name, app->key.pid, app->key.sock, | |
312 | ua_sess->handle, ret); | |
b551a063 DG |
313 | goto error; |
314 | } | |
315 | ||
5b4a0ec0 DG |
316 | ua_chan->handle = ua_chan->obj->handle; |
317 | ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; | |
318 | ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; | |
319 | ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; | |
b551a063 | 320 | |
5b4a0ec0 DG |
321 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
322 | ua_chan->name, app->key.pid, app->key.sock); | |
b551a063 | 323 | |
b551a063 DG |
324 | error: |
325 | return ret; | |
326 | } | |
327 | ||
91d76f53 | 328 | /* |
5b4a0ec0 | 329 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 330 | */ |
5b4a0ec0 DG |
331 | static int create_ust_event(struct ust_app *app, |
332 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan, | |
333 | struct ust_app_event *ua_event) | |
91d76f53 | 334 | { |
5b4a0ec0 | 335 | int ret = 0; |
284d8f55 | 336 | |
5b4a0ec0 DG |
337 | /* Create UST event on tracer */ |
338 | ret = ustctl_create_event(app->key.sock, &ua_event->attr, ua_chan->obj, | |
339 | &ua_event->obj); | |
340 | if (ret < 0) { | |
341 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
342 | ua_event->attr.name, app->key.pid, ret); | |
343 | goto error; | |
91d76f53 | 344 | } |
f6a9efaa | 345 | |
5b4a0ec0 DG |
346 | ua_event->handle = ua_event->obj->handle; |
347 | ua_event->enabled = 1; | |
284d8f55 | 348 | |
5b4a0ec0 DG |
349 | DBG2("UST app event %s created successfully for pid:%d", |
350 | ua_event->attr.name, app->key.pid); | |
f6a9efaa | 351 | |
5b4a0ec0 DG |
352 | error: |
353 | return ret; | |
91d76f53 | 354 | } |
48842b30 DG |
355 | |
356 | /* | |
357 | * Alloc new UST app session. | |
358 | */ | |
421cb601 | 359 | static struct ust_app_session *alloc_ust_app_session(void) |
48842b30 DG |
360 | { |
361 | struct ust_app_session *ua_sess; | |
362 | ||
421cb601 | 363 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
364 | ua_sess = zmalloc(sizeof(struct ust_app_session)); |
365 | if (ua_sess == NULL) { | |
366 | PERROR("malloc"); | |
367 | goto error; | |
368 | } | |
369 | ||
48842b30 DG |
370 | ua_sess->handle = -1; |
371 | ua_sess->channels = hashtable_new_str(0); | |
48842b30 DG |
372 | |
373 | return ua_sess; | |
374 | ||
375 | error: | |
376 | return NULL; | |
377 | } | |
378 | ||
421cb601 DG |
379 | /* |
380 | * Alloc new UST app channel. | |
381 | */ | |
284d8f55 DG |
382 | static struct ust_app_channel *alloc_ust_app_channel(char *name, |
383 | struct lttng_ust_channel *attr) | |
48842b30 DG |
384 | { |
385 | struct ust_app_channel *ua_chan; | |
386 | ||
421cb601 | 387 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
388 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); |
389 | if (ua_chan == NULL) { | |
390 | PERROR("malloc"); | |
391 | goto error; | |
392 | } | |
393 | ||
284d8f55 | 394 | /* Setup channel name */ |
48842b30 DG |
395 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); |
396 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
284d8f55 | 397 | |
48842b30 | 398 | ua_chan->handle = -1; |
48842b30 | 399 | ua_chan->ctx = hashtable_new(0); |
48842b30 DG |
400 | ua_chan->events = hashtable_new_str(0); |
401 | hashtable_node_init(&ua_chan->node, (void *) ua_chan->name, | |
402 | strlen(ua_chan->name)); | |
403 | ||
284d8f55 DG |
404 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); |
405 | ||
406 | /* Copy attributes */ | |
407 | if (attr) { | |
408 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
409 | } | |
410 | ||
48842b30 DG |
411 | DBG3("UST app channel %s allocated", ua_chan->name); |
412 | ||
413 | return ua_chan; | |
414 | ||
415 | error: | |
416 | return NULL; | |
417 | } | |
418 | ||
421cb601 DG |
419 | /* |
420 | * Alloc new UST app event. | |
421 | */ | |
284d8f55 DG |
422 | static struct ust_app_event *alloc_ust_app_event(char *name, |
423 | struct lttng_ust_event *attr) | |
48842b30 DG |
424 | { |
425 | struct ust_app_event *ua_event; | |
426 | ||
421cb601 | 427 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
428 | ua_event = zmalloc(sizeof(struct ust_app_event)); |
429 | if (ua_event == NULL) { | |
430 | PERROR("malloc"); | |
431 | goto error; | |
432 | } | |
433 | ||
434 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
435 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
436 | ua_event->ctx = hashtable_new(0); | |
437 | hashtable_node_init(&ua_event->node, (void *) ua_event->name, | |
438 | strlen(ua_event->name)); | |
439 | ||
284d8f55 DG |
440 | /* Copy attributes */ |
441 | if (attr) { | |
442 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
443 | } | |
444 | ||
48842b30 DG |
445 | DBG3("UST app event %s allocated", ua_event->name); |
446 | ||
447 | return ua_event; | |
448 | ||
449 | error: | |
450 | return NULL; | |
451 | } | |
452 | ||
5b4a0ec0 DG |
453 | /* |
454 | * Copy data between an UST app event and a LTT event. | |
455 | */ | |
421cb601 | 456 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
457 | struct ltt_ust_event *uevent) |
458 | { | |
459 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); | |
460 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
461 | ||
5b4a0ec0 DG |
462 | /* Copy event attributes */ |
463 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
464 | ||
48842b30 DG |
465 | /* TODO: support copy context */ |
466 | } | |
467 | ||
5b4a0ec0 DG |
468 | /* |
469 | * Copy data between an UST app channel and a LTT channel. | |
470 | */ | |
421cb601 | 471 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
472 | struct ltt_ust_channel *uchan) |
473 | { | |
474 | struct cds_lfht_iter iter; | |
5b4a0ec0 | 475 | struct cds_lfht_node *ua_event_node; |
48842b30 DG |
476 | struct ltt_ust_event *uevent; |
477 | struct ust_app_event *ua_event; | |
478 | ||
421cb601 | 479 | DBG2("Shadow copy of UST app channel %s", ua_chan->name); |
48842b30 DG |
480 | |
481 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
482 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
483 | /* Copy event attributes */ |
484 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 DG |
485 | |
486 | /* TODO: support copy context */ | |
487 | ||
421cb601 | 488 | /* Copy all events from ltt ust channel to ust app channel */ |
5b4a0ec0 | 489 | cds_lfht_for_each_entry(uchan->events, &iter, uevent, node) { |
ba767faf MD |
490 | struct cds_lfht_iter uiter; |
491 | ||
48842b30 | 492 | ua_event_node = hashtable_lookup(ua_chan->events, |
ba767faf MD |
493 | (void *) uevent->attr.name, strlen(uevent->attr.name), |
494 | &uiter); | |
48842b30 | 495 | if (ua_event_node == NULL) { |
421cb601 | 496 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 497 | uevent->attr.name); |
284d8f55 | 498 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 499 | if (ua_event == NULL) { |
5b4a0ec0 | 500 | continue; |
48842b30 | 501 | } |
421cb601 | 502 | shadow_copy_event(ua_event, uevent); |
48842b30 | 503 | hashtable_add_unique(ua_chan->events, &ua_event->node); |
48842b30 | 504 | } |
48842b30 DG |
505 | } |
506 | ||
421cb601 | 507 | DBG3("Shadow copy channel done"); |
48842b30 DG |
508 | } |
509 | ||
5b4a0ec0 DG |
510 | /* |
511 | * Copy data between a UST app session and a regular LTT session. | |
512 | */ | |
421cb601 | 513 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
477d7741 MD |
514 | struct ltt_ust_session *usess, |
515 | struct ust_app *app) | |
48842b30 | 516 | { |
5b4a0ec0 | 517 | struct cds_lfht_node *ua_chan_node; |
48842b30 DG |
518 | struct cds_lfht_iter iter; |
519 | struct ltt_ust_channel *uchan; | |
520 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
521 | time_t rawtime; |
522 | struct tm *timeinfo; | |
523 | char datetime[16]; | |
524 | int ret; | |
525 | ||
526 | /* Get date and time for unique app path */ | |
527 | time(&rawtime); | |
528 | timeinfo = localtime(&rawtime); | |
529 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 530 | |
421cb601 | 531 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 DG |
532 | |
533 | ua_sess->uid = usess->uid; | |
534 | ||
477d7741 MD |
535 | ret = snprintf(ua_sess->path, PATH_MAX, |
536 | "%s/%s-%d-%s", | |
537 | usess->pathname, app->name, app->key.pid, | |
538 | datetime); | |
539 | if (ret < 0) { | |
540 | PERROR("asprintf UST shadow copy session"); | |
541 | /* TODO: We cannot return an error from here.. */ | |
542 | assert(0); | |
543 | } | |
544 | ||
48842b30 DG |
545 | /* TODO: support all UST domain */ |
546 | ||
547 | /* Iterate over all channels in global domain. */ | |
5b4a0ec0 DG |
548 | cds_lfht_for_each_entry(usess->domain_global.channels, &iter, |
549 | uchan, node) { | |
ba767faf MD |
550 | struct cds_lfht_iter uiter; |
551 | ||
48842b30 | 552 | ua_chan_node = hashtable_lookup(ua_sess->channels, |
ba767faf MD |
553 | (void *)uchan->name, strlen(uchan->name), |
554 | &uiter); | |
5b4a0ec0 DG |
555 | if (ua_chan_node != NULL) { |
556 | continue; | |
557 | } | |
421cb601 | 558 | |
5b4a0ec0 DG |
559 | DBG2("Channel %s not found on shadow session copy, creating it", |
560 | uchan->name); | |
561 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
562 | if (ua_chan == NULL) { | |
563 | /* malloc failed... continuing */ | |
564 | continue; | |
48842b30 DG |
565 | } |
566 | ||
5b4a0ec0 DG |
567 | shadow_copy_channel(ua_chan, uchan); |
568 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
48842b30 DG |
569 | } |
570 | } | |
571 | ||
84cd17c6 MD |
572 | static |
573 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
574 | struct ust_app *app, struct cds_lfht_iter *iter) | |
575 | { | |
576 | /* Get right UST app session from app */ | |
577 | (void) hashtable_lookup(app->sessions, | |
578 | (void *) ((unsigned long) usess->uid), sizeof(void *), | |
579 | iter); | |
580 | } | |
581 | ||
421cb601 DG |
582 | /* |
583 | * Return ust app session from the app session hashtable using the UST session | |
584 | * uid. | |
585 | */ | |
48842b30 DG |
586 | static struct ust_app_session *lookup_session_by_app( |
587 | struct ltt_ust_session *usess, struct ust_app *app) | |
588 | { | |
589 | struct cds_lfht_iter iter; | |
590 | struct cds_lfht_node *node; | |
591 | ||
84cd17c6 MD |
592 | __lookup_session_by_app(usess, app, &iter); |
593 | node = hashtable_iter_get_node(&iter); | |
48842b30 DG |
594 | if (node == NULL) { |
595 | goto error; | |
596 | } | |
597 | ||
598 | return caa_container_of(node, struct ust_app_session, node); | |
599 | ||
600 | error: | |
601 | return NULL; | |
602 | } | |
603 | ||
421cb601 DG |
604 | /* |
605 | * Create a UST session onto the tracer of app and add it the session | |
606 | * hashtable. | |
607 | * | |
608 | * Return ust app session or NULL on error. | |
609 | */ | |
610 | static struct ust_app_session *create_ust_app_session( | |
611 | struct ltt_ust_session *usess, struct ust_app *app) | |
612 | { | |
613 | int ret; | |
614 | struct ust_app_session *ua_sess; | |
615 | ||
616 | ua_sess = lookup_session_by_app(usess, app); | |
617 | if (ua_sess == NULL) { | |
618 | DBG2("UST app pid: %d session uid %d not found, creating it", | |
619 | app->key.pid, usess->uid); | |
620 | ua_sess = alloc_ust_app_session(); | |
621 | if (ua_sess == NULL) { | |
622 | /* Only malloc can failed so something is really wrong */ | |
623 | goto error; | |
624 | } | |
477d7741 | 625 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
626 | } |
627 | ||
628 | if (ua_sess->handle == -1) { | |
629 | ret = ustctl_create_session(app->key.sock); | |
630 | if (ret < 0) { | |
631 | ERR("Error creating session for app pid %d, sock %d", | |
632 | app->key.pid, app->key.sock); | |
633 | /* TODO: free() ua_sess */ | |
634 | goto error; | |
635 | } | |
636 | ||
637 | DBG2("UST app ustctl create session handle %d", ret); | |
638 | ua_sess->handle = ret; | |
639 | ||
640 | /* Add ust app session to app's HT */ | |
641 | hashtable_node_init(&ua_sess->node, | |
642 | (void *)((unsigned long) ua_sess->uid), sizeof(void *)); | |
643 | hashtable_add_unique(app->sessions, &ua_sess->node); | |
644 | ||
645 | DBG2("UST app session created successfully with handle %d", ret); | |
646 | } | |
647 | ||
648 | return ua_sess; | |
649 | ||
650 | error: | |
651 | return NULL; | |
652 | } | |
653 | ||
284d8f55 | 654 | /* |
5b4a0ec0 | 655 | * Create UST app channel and create it on the tracer. |
284d8f55 | 656 | */ |
5b4a0ec0 DG |
657 | static struct ust_app_channel *create_ust_app_channel( |
658 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
659 | struct ust_app *app) | |
660 | { | |
661 | int ret = 0; | |
662 | struct cds_lfht_iter iter; | |
663 | struct cds_lfht_node *ua_chan_node; | |
664 | struct ust_app_channel *ua_chan; | |
665 | ||
666 | /* Lookup channel in the ust app session */ | |
667 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
668 | (void *)uchan->name, strlen(uchan->name), &iter); | |
669 | if (ua_chan_node == NULL) { | |
670 | DBG2("Unable to find channel %s in ust session uid %u", | |
671 | uchan->name, ua_sess->uid); | |
672 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
673 | if (ua_chan == NULL) { | |
674 | goto error; | |
675 | } | |
676 | shadow_copy_channel(ua_chan, uchan); | |
677 | ||
678 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
679 | } else { | |
680 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
681 | } | |
682 | ||
683 | ret = create_ust_channel(app, ua_sess, ua_chan); | |
684 | if (ret < 0) { | |
685 | goto error; | |
686 | } | |
687 | ||
688 | return ua_chan; | |
689 | ||
690 | error: | |
691 | return NULL; | |
692 | } | |
693 | ||
694 | /* | |
695 | * Create UST app event and create it on the tracer side. | |
696 | */ | |
697 | static struct ust_app_event *create_ust_app_event( | |
698 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan, | |
699 | struct ltt_ust_event *uevent, struct ust_app *app) | |
284d8f55 DG |
700 | { |
701 | int ret; | |
5b4a0ec0 DG |
702 | struct cds_lfht_iter iter; |
703 | struct cds_lfht_node *ua_event_node; | |
704 | struct ust_app_event *ua_event; | |
284d8f55 | 705 | |
5b4a0ec0 DG |
706 | /* Get event node */ |
707 | ua_event_node = hashtable_lookup(ua_chan->events, | |
708 | (void *)uevent->attr.name, strlen(uevent->attr.name), &iter); | |
709 | if (ua_event_node == NULL) { | |
710 | DBG2("UST app event %s not found, creating it", uevent->attr.name); | |
711 | /* Does not exist so create one */ | |
712 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
713 | if (ua_event == NULL) { | |
714 | /* Only malloc can failed so something is really wrong */ | |
715 | goto error; | |
716 | } | |
717 | shadow_copy_event(ua_event, uevent); | |
718 | ||
719 | hashtable_add_unique(ua_chan->events, &ua_event->node); | |
720 | } else { | |
721 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
722 | } | |
723 | ||
724 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); | |
284d8f55 | 725 | if (ret < 0) { |
284d8f55 DG |
726 | goto error; |
727 | } | |
728 | ||
5b4a0ec0 | 729 | return ua_event; |
284d8f55 | 730 | |
5b4a0ec0 DG |
731 | error: |
732 | return NULL; | |
733 | } | |
734 | ||
735 | /* | |
736 | * Create UST metadata and open it on the tracer side. | |
737 | */ | |
738 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
739 | char *pathname, struct ust_app *app) | |
740 | { | |
741 | int ret = 0; | |
742 | ||
743 | if (ua_sess->metadata == NULL) { | |
744 | /* Allocate UST metadata */ | |
745 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
746 | if (ua_sess->metadata == NULL) { | |
747 | ERR("UST app session %d creating metadata failed", | |
748 | ua_sess->handle); | |
749 | goto error; | |
750 | } | |
751 | ||
752 | ret = open_ust_metadata(app, ua_sess); | |
753 | if (ret < 0) { | |
754 | goto error; | |
755 | } | |
756 | ||
757 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
758 | } | |
759 | ||
760 | /* Open UST metadata stream */ | |
761 | if (ua_sess->metadata->stream_obj == NULL) { | |
762 | ret = create_ust_stream(app, ua_sess); | |
763 | if (ret < 0) { | |
764 | goto error; | |
765 | } | |
766 | ||
477d7741 | 767 | ret = mkdir(ua_sess->path, S_IRWXU | S_IRWXG); |
5b4a0ec0 DG |
768 | if (ret < 0) { |
769 | PERROR("mkdir UST metadata"); | |
770 | goto error; | |
771 | } | |
772 | ||
477d7741 MD |
773 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
774 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
775 | if (ret < 0) { |
776 | PERROR("asprintf UST create stream"); | |
777 | goto error; | |
778 | } | |
779 | ||
780 | DBG2("UST metadata stream object created for app pid %d", | |
781 | app->key.pid); | |
782 | } else { | |
783 | ERR("Attempting to create stream without metadata opened"); | |
784 | goto error; | |
785 | } | |
786 | ||
787 | return 0; | |
788 | ||
789 | error: | |
790 | return -1; | |
791 | } | |
792 | ||
793 | /* | |
794 | * Return pointer to traceable apps list. | |
795 | */ | |
796 | struct cds_lfht *ust_app_get_ht(void) | |
797 | { | |
798 | return ust_app_ht; | |
799 | } | |
800 | ||
801 | /* | |
802 | * Return ust app pointer or NULL if not found. | |
803 | */ | |
804 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
805 | { | |
806 | struct cds_lfht_node *node; | |
807 | struct cds_lfht_iter iter; | |
808 | ||
809 | rcu_read_lock(); | |
810 | node = hashtable_lookup(ust_app_ht, | |
811 | (void *)((unsigned long) pid), sizeof(void *), &iter); | |
812 | if (node == NULL) { | |
813 | DBG2("UST app no found with pid %d", pid); | |
814 | goto error; | |
815 | } | |
816 | rcu_read_unlock(); | |
817 | ||
818 | DBG2("Found UST app by pid %d", pid); | |
819 | ||
820 | return caa_container_of(node, struct ust_app, node); | |
821 | ||
822 | error: | |
823 | rcu_read_unlock(); | |
824 | return NULL; | |
825 | } | |
826 | ||
827 | /* | |
828 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
829 | * add it to the global traceable app list. | |
830 | * | |
0df502fd MD |
831 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
832 | * bitness is not supported. | |
5b4a0ec0 DG |
833 | */ |
834 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
835 | { | |
836 | struct ust_app *lta; | |
837 | ||
0df502fd MD |
838 | /* |
839 | * Currently support only tracing of application which share the | |
840 | * same bitness as the consumer. Eventually implement dispatch | |
841 | * to specific compat32 consumer. | |
842 | */ | |
843 | if (msg->bits_per_long != CAA_BITS_PER_LONG) { | |
f943b0fb | 844 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
0df502fd MD |
845 | "%d-bit long, but only " |
846 | "%d-bit lttng-consumerd is available.\n", | |
847 | msg->name, msg->pid, msg->bits_per_long, | |
848 | CAA_BITS_PER_LONG); | |
88ff5b7f | 849 | close(sock); |
0df502fd MD |
850 | return -EINVAL; |
851 | } | |
852 | ||
5b4a0ec0 DG |
853 | lta = zmalloc(sizeof(struct ust_app)); |
854 | if (lta == NULL) { | |
855 | PERROR("malloc"); | |
856 | return -ENOMEM; | |
857 | } | |
858 | ||
859 | lta->ppid = msg->ppid; | |
860 | lta->uid = msg->uid; | |
861 | lta->gid = msg->gid; | |
862 | lta->v_major = msg->major; | |
863 | lta->v_minor = msg->minor; | |
864 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
865 | lta->name[16] = '\0'; | |
866 | lta->sessions = hashtable_new(0); | |
867 | ||
868 | /* Set key map */ | |
869 | lta->key.pid = msg->pid; | |
870 | hashtable_node_init(<a->node, (void *)((unsigned long)lta->key.pid), | |
871 | sizeof(void *)); | |
872 | lta->key.sock = sock; | |
873 | hashtable_node_init(<a->key.node, (void *)((unsigned long)lta->key.sock), | |
874 | sizeof(void *)); | |
875 | ||
876 | rcu_read_lock(); | |
877 | hashtable_add_unique(ust_app_sock_key_map, <a->key.node); | |
878 | hashtable_add_unique(ust_app_ht, <a->node); | |
879 | rcu_read_unlock(); | |
880 | ||
881 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
882 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, | |
883 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
884 | ||
885 | return 0; | |
886 | } | |
887 | ||
888 | /* | |
889 | * Unregister app by removing it from the global traceable app list and freeing | |
890 | * the data struct. | |
891 | * | |
892 | * The socket is already closed at this point so no close to sock. | |
893 | */ | |
894 | void ust_app_unregister(int sock) | |
895 | { | |
896 | struct ust_app *lta; | |
897 | struct cds_lfht_node *node; | |
898 | struct cds_lfht_iter iter; | |
899 | ||
900 | rcu_read_lock(); | |
901 | lta = find_app_by_sock(sock); | |
902 | if (lta == NULL) { | |
903 | ERR("Unregister app sock %d not found!", sock); | |
904 | goto error; | |
905 | } | |
906 | ||
907 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
908 | ||
909 | /* Get the node reference for a call_rcu */ | |
910 | node = hashtable_lookup(ust_app_ht, | |
911 | (void *)((unsigned long) lta->key.pid), sizeof(void *), &iter); | |
912 | if (node == NULL) { | |
913 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
914 | goto error; | |
915 | } | |
284d8f55 | 916 | |
5b4a0ec0 DG |
917 | hashtable_del(ust_app_ht, &iter); |
918 | call_rcu(&node->head, delete_ust_app_rcu); | |
284d8f55 | 919 | error: |
5b4a0ec0 DG |
920 | rcu_read_unlock(); |
921 | return; | |
284d8f55 DG |
922 | } |
923 | ||
924 | /* | |
5b4a0ec0 | 925 | * Return traceable_app_count |
284d8f55 | 926 | */ |
5b4a0ec0 | 927 | unsigned long ust_app_list_count(void) |
284d8f55 | 928 | { |
5b4a0ec0 | 929 | unsigned long count; |
284d8f55 | 930 | |
5b4a0ec0 DG |
931 | rcu_read_lock(); |
932 | count = hashtable_get_count(ust_app_ht); | |
933 | rcu_read_unlock(); | |
284d8f55 | 934 | |
5b4a0ec0 | 935 | return count; |
284d8f55 DG |
936 | } |
937 | ||
5b4a0ec0 DG |
938 | /* |
939 | * Fill events array with all events name of all registered apps. | |
940 | */ | |
941 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 942 | { |
5b4a0ec0 DG |
943 | int ret, handle; |
944 | size_t nbmem, count = 0; | |
421cb601 | 945 | struct cds_lfht_iter iter; |
5b4a0ec0 DG |
946 | struct ust_app *app; |
947 | struct lttng_event *tmp; | |
421cb601 | 948 | |
5b4a0ec0 DG |
949 | nbmem = UST_APP_EVENT_LIST_SIZE; |
950 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
951 | if (tmp == NULL) { | |
952 | PERROR("zmalloc ust app events"); | |
953 | ret = -ENOMEM; | |
421cb601 DG |
954 | goto error; |
955 | } | |
956 | ||
5b4a0ec0 | 957 | rcu_read_lock(); |
421cb601 | 958 | |
5b4a0ec0 DG |
959 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
960 | handle = ustctl_tracepoint_list(app->key.sock); | |
961 | if (handle < 0) { | |
962 | ERR("UST app list events getting handle failed for app pid %d", | |
963 | app->key.pid); | |
964 | continue; | |
965 | } | |
421cb601 | 966 | |
5b4a0ec0 DG |
967 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, |
968 | tmp[count].name)) != -ENOENT) { | |
969 | if (count > nbmem) { | |
970 | DBG2("Reallocating event list from %zu to %zu bytes", nbmem, | |
971 | nbmem + UST_APP_EVENT_LIST_SIZE); | |
972 | nbmem += UST_APP_EVENT_LIST_SIZE; | |
973 | tmp = realloc(tmp, nbmem); | |
974 | if (tmp == NULL) { | |
975 | PERROR("realloc ust app events"); | |
976 | ret = -ENOMEM; | |
977 | goto rcu_error; | |
978 | } | |
979 | } | |
421cb601 | 980 | |
5b4a0ec0 DG |
981 | tmp[count].type = LTTNG_UST_TRACEPOINT; |
982 | tmp[count].pid = app->key.pid; | |
983 | tmp[count].enabled = -1; | |
984 | count++; | |
421cb601 | 985 | } |
421cb601 DG |
986 | } |
987 | ||
5b4a0ec0 DG |
988 | ret = count; |
989 | *events = tmp; | |
421cb601 | 990 | |
5b4a0ec0 | 991 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 992 | |
5b4a0ec0 DG |
993 | rcu_error: |
994 | rcu_read_unlock(); | |
421cb601 | 995 | error: |
5b4a0ec0 | 996 | return ret; |
421cb601 DG |
997 | } |
998 | ||
5b4a0ec0 DG |
999 | /* |
1000 | * Free and clean all traceable apps of the global list. | |
1001 | */ | |
1002 | void ust_app_clean_list(void) | |
421cb601 | 1003 | { |
5b4a0ec0 DG |
1004 | int ret; |
1005 | struct cds_lfht_node *node; | |
1006 | struct cds_lfht_iter iter; | |
1007 | struct ust_app *app; | |
421cb601 | 1008 | |
5b4a0ec0 | 1009 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1010 | |
5b4a0ec0 | 1011 | rcu_read_lock(); |
421cb601 | 1012 | |
5b4a0ec0 DG |
1013 | cds_lfht_for_each(ust_app_ht, &iter, node) { |
1014 | app = caa_container_of(node, struct ust_app, node); | |
421cb601 | 1015 | |
5b4a0ec0 DG |
1016 | ret = hashtable_del(ust_app_ht, &iter); |
1017 | if (!ret) { | |
1018 | call_rcu(&node->head, delete_ust_app_rcu); | |
421cb601 | 1019 | } |
421cb601 DG |
1020 | } |
1021 | ||
5b4a0ec0 DG |
1022 | hashtable_destroy(ust_app_ht); |
1023 | hashtable_destroy(ust_app_sock_key_map); | |
421cb601 | 1024 | |
5b4a0ec0 DG |
1025 | rcu_read_unlock(); |
1026 | } | |
1027 | ||
1028 | /* | |
1029 | * Init UST app hash table. | |
1030 | */ | |
1031 | void ust_app_ht_alloc(void) | |
1032 | { | |
1033 | ust_app_ht = hashtable_new(0); | |
1034 | ust_app_sock_key_map = hashtable_new(0); | |
421cb601 DG |
1035 | } |
1036 | ||
1037 | /* | |
5b4a0ec0 | 1038 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1039 | */ |
5b4a0ec0 | 1040 | int ust_app_create_channel_all(struct ltt_ust_session *usess, |
48842b30 DG |
1041 | struct ltt_ust_channel *uchan) |
1042 | { | |
1043 | int ret = 0; | |
1044 | struct cds_lfht_iter iter; | |
48842b30 DG |
1045 | struct ust_app *app; |
1046 | struct ust_app_session *ua_sess; | |
1047 | struct ust_app_channel *ua_chan; | |
1048 | ||
421cb601 DG |
1049 | if (usess == NULL || uchan == NULL) { |
1050 | ERR("Adding UST global channel to NULL values"); | |
1051 | ret = -1; | |
1052 | goto error; | |
1053 | } | |
1054 | ||
48842b30 DG |
1055 | DBG2("UST app adding channel %s to global domain for session uid %d", |
1056 | uchan->name, usess->uid); | |
1057 | ||
1058 | rcu_read_lock(); | |
421cb601 | 1059 | |
5b4a0ec0 DG |
1060 | /* For every registered applications */ |
1061 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
421cb601 DG |
1062 | /* Create session on the tracer side and add it to app session HT */ |
1063 | ua_sess = create_ust_app_session(usess, app); | |
509cbaf8 | 1064 | if (ua_sess == NULL) { |
5b4a0ec0 | 1065 | continue; |
48842b30 DG |
1066 | } |
1067 | ||
421cb601 DG |
1068 | /* Create channel onto application */ |
1069 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1070 | if (ua_chan == NULL) { | |
5b4a0ec0 | 1071 | continue; |
48842b30 | 1072 | } |
48842b30 | 1073 | } |
5b4a0ec0 | 1074 | |
48842b30 DG |
1075 | rcu_read_unlock(); |
1076 | ||
421cb601 | 1077 | error: |
48842b30 DG |
1078 | return ret; |
1079 | } | |
1080 | ||
5b4a0ec0 DG |
1081 | /* |
1082 | * For a specific UST session and UST channel, create the event for all | |
1083 | * registered apps. | |
1084 | */ | |
1085 | int ust_app_create_event_all(struct ltt_ust_session *usess, | |
48842b30 DG |
1086 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1087 | { | |
1088 | int ret = 0; | |
1089 | struct cds_lfht_iter iter; | |
5b4a0ec0 | 1090 | struct cds_lfht_node *ua_chan_node; |
48842b30 DG |
1091 | struct ust_app *app; |
1092 | struct ust_app_session *ua_sess; | |
1093 | struct ust_app_channel *ua_chan; | |
1094 | struct ust_app_event *ua_event; | |
48842b30 | 1095 | |
284d8f55 | 1096 | DBG("UST app creating event %s for all apps for session uid %d", |
48842b30 DG |
1097 | uevent->attr.name, usess->uid); |
1098 | ||
1099 | rcu_read_lock(); | |
421cb601 DG |
1100 | |
1101 | /* For all registered applications */ | |
5b4a0ec0 | 1102 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
ba767faf MD |
1103 | struct cds_lfht_iter uiter; |
1104 | ||
421cb601 DG |
1105 | /* Create session on the tracer side and add it to app session HT */ |
1106 | ua_sess = create_ust_app_session(usess, app); | |
509cbaf8 | 1107 | if (ua_sess == NULL) { |
5b4a0ec0 | 1108 | continue; |
48842b30 DG |
1109 | } |
1110 | ||
1111 | /* Lookup channel in the ust app session */ | |
1112 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
ba767faf MD |
1113 | (void *)uchan->name, strlen(uchan->name), |
1114 | &uiter); | |
48842b30 | 1115 | if (ua_chan_node == NULL) { |
421cb601 DG |
1116 | ERR("Channel %s not found in session uid %d. Skipping", |
1117 | uchan->name, usess->uid); | |
5b4a0ec0 | 1118 | continue; |
48842b30 | 1119 | } |
48842b30 DG |
1120 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1121 | ||
421cb601 DG |
1122 | ua_event = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1123 | if (ua_event == NULL) { | |
5b4a0ec0 | 1124 | continue; |
48842b30 | 1125 | } |
48842b30 | 1126 | } |
5b4a0ec0 | 1127 | |
48842b30 DG |
1128 | rcu_read_unlock(); |
1129 | ||
1130 | return ret; | |
1131 | } | |
1132 | ||
5b4a0ec0 DG |
1133 | /* |
1134 | * Start tracing for a specific UST session and app. | |
1135 | */ | |
421cb601 | 1136 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1137 | { |
1138 | int ret = 0; | |
1139 | struct cds_lfht_iter iter; | |
48842b30 DG |
1140 | struct ust_app_session *ua_sess; |
1141 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 1142 | struct ltt_ust_stream *ustream; |
48842b30 | 1143 | |
421cb601 | 1144 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 1145 | |
509cbaf8 MD |
1146 | rcu_read_lock(); |
1147 | ||
421cb601 DG |
1148 | ua_sess = lookup_session_by_app(usess, app); |
1149 | if (ua_sess == NULL) { | |
1150 | /* Only malloc can failed so something is really wrong */ | |
509cbaf8 | 1151 | goto error_rcu_unlock; |
421cb601 | 1152 | } |
48842b30 | 1153 | |
8be98f9a MD |
1154 | /* upon restart, we skip the setup, already done */ |
1155 | if (ua_sess->started) | |
1156 | goto skip_setup; | |
1157 | ||
421cb601 DG |
1158 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1159 | if (ret < 0) { | |
509cbaf8 | 1160 | goto error_rcu_unlock; |
421cb601 | 1161 | } |
48842b30 | 1162 | |
421cb601 | 1163 | /* For each channel */ |
5b4a0ec0 | 1164 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { |
421cb601 DG |
1165 | /* Create all streams */ |
1166 | while (1) { | |
5b4a0ec0 | 1167 | /* Create UST stream */ |
421cb601 DG |
1168 | ustream = zmalloc(sizeof(*ustream)); |
1169 | if (ustream == NULL) { | |
1170 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1171 | goto error_rcu_unlock; |
421cb601 | 1172 | } |
48842b30 | 1173 | |
421cb601 DG |
1174 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
1175 | &ustream->obj); | |
48842b30 | 1176 | if (ret < 0) { |
421cb601 DG |
1177 | /* Got all streams */ |
1178 | break; | |
48842b30 | 1179 | } |
421cb601 | 1180 | ustream->handle = ustream->obj->handle; |
48842b30 | 1181 | |
421cb601 DG |
1182 | /* Order is important */ |
1183 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
477d7741 MD |
1184 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", |
1185 | ua_sess->path, ua_chan->name, | |
1186 | ua_chan->streams.count++); | |
aba8e916 DG |
1187 | if (ret < 0) { |
1188 | PERROR("asprintf UST create stream"); | |
421cb601 | 1189 | continue; |
aba8e916 | 1190 | } |
421cb601 DG |
1191 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1192 | ustream->pathname); | |
1193 | } | |
421cb601 | 1194 | } |
aba8e916 | 1195 | |
421cb601 | 1196 | /* Setup UST consumer socket and send fds to it */ |
ba5d816e | 1197 | ret = ust_consumer_send_session(ust_consumer_fd, ua_sess); |
421cb601 | 1198 | if (ret < 0) { |
509cbaf8 | 1199 | goto error_rcu_unlock; |
421cb601 | 1200 | } |
8be98f9a | 1201 | ua_sess->started = 1; |
48842b30 | 1202 | |
8be98f9a | 1203 | skip_setup: |
421cb601 DG |
1204 | /* This start the UST tracing */ |
1205 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
1206 | if (ret < 0) { | |
1207 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 1208 | goto error_rcu_unlock; |
421cb601 | 1209 | } |
5b4a0ec0 | 1210 | |
509cbaf8 | 1211 | rcu_read_unlock(); |
48842b30 | 1212 | |
421cb601 DG |
1213 | /* Quiescent wait after starting trace */ |
1214 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 1215 | |
421cb601 | 1216 | return 0; |
48842b30 | 1217 | |
509cbaf8 MD |
1218 | error_rcu_unlock: |
1219 | rcu_read_unlock(); | |
421cb601 DG |
1220 | return -1; |
1221 | } | |
48842b30 | 1222 | |
8be98f9a MD |
1223 | /* |
1224 | * Stop tracing for a specific UST session and app. | |
1225 | */ | |
1226 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1227 | { | |
1228 | int ret = 0; | |
1229 | struct ust_app_session *ua_sess; | |
1230 | ||
1231 | DBG("Stopping tracing for ust app pid %d", app->key.pid); | |
1232 | ||
1233 | rcu_read_lock(); | |
1234 | ||
1235 | ua_sess = lookup_session_by_app(usess, app); | |
1236 | if (ua_sess == NULL) { | |
1237 | /* Only malloc can failed so something is really wrong */ | |
1238 | goto error_rcu_unlock; | |
1239 | } | |
1240 | ||
1241 | #if 0 /* only useful when periodical flush will be supported */ | |
1242 | /* need to keep a handle on shm in session for this. */ | |
1243 | /* Flush all buffers before stopping */ | |
1244 | ret = ustctl_flush_buffer(usess->sock, usess->metadata->obj); | |
1245 | if (ret < 0) { | |
1246 | ERR("UST metadata flush failed"); | |
1247 | } | |
1248 | ||
1249 | cds_list_for_each_entry(ustchan, &usess->channels.head, list) { | |
1250 | ret = ustctl_flush_buffer(usess->sock, ustchan->obj); | |
1251 | if (ret < 0) { | |
1252 | ERR("UST flush buffer error"); | |
1253 | } | |
1254 | } | |
1255 | #endif | |
1256 | ||
1257 | /* This inhibits UST tracing */ | |
1258 | ret = ustctl_stop_session(app->key.sock, ua_sess->handle); | |
1259 | if (ret < 0) { | |
1260 | ERR("Error stopping tracing for app pid: %d", app->key.pid); | |
1261 | goto error_rcu_unlock; | |
1262 | } | |
1263 | ||
1264 | rcu_read_unlock(); | |
1265 | ||
1266 | /* Quiescent wait after stopping trace */ | |
1267 | ustctl_wait_quiescent(app->key.sock); | |
1268 | ||
1269 | return 0; | |
1270 | ||
1271 | error_rcu_unlock: | |
1272 | rcu_read_unlock(); | |
1273 | return -1; | |
1274 | } | |
1275 | ||
84cd17c6 MD |
1276 | /* |
1277 | * Destroy a specific UST session in apps. | |
1278 | */ | |
1279 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1280 | { | |
1281 | struct ust_app_session *ua_sess; | |
1282 | struct lttng_ust_object_data obj; | |
1283 | struct cds_lfht_iter iter; | |
1284 | struct cds_lfht_node *node; | |
1285 | ||
1286 | DBG("Destroy tracing for ust app pid %d", app->key.pid); | |
1287 | ||
1288 | rcu_read_lock(); | |
1289 | ||
1290 | __lookup_session_by_app(usess, app, &iter); | |
1291 | node = hashtable_iter_get_node(&iter); | |
1292 | if (node == NULL) { | |
1293 | /* Only malloc can failed so something is really wrong */ | |
1294 | goto error_rcu_unlock; | |
1295 | } | |
1296 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
1297 | hashtable_del(app->sessions, &iter); | |
1298 | delete_ust_app_session(app->key.sock, ua_sess); | |
1299 | obj.handle = ua_sess->handle; | |
1300 | obj.shm_fd = -1; | |
1301 | obj.wait_fd = -1; | |
1302 | obj.memory_map_size = 0; | |
1303 | ustctl_release_object(app->key.sock, &obj); | |
1304 | ||
1305 | rcu_read_unlock(); | |
1306 | ||
1307 | /* Quiescent wait after stopping trace */ | |
1308 | ustctl_wait_quiescent(app->key.sock); | |
1309 | ||
1310 | return 0; | |
1311 | ||
1312 | error_rcu_unlock: | |
1313 | rcu_read_unlock(); | |
1314 | return -1; | |
1315 | } | |
1316 | ||
5b4a0ec0 DG |
1317 | /* |
1318 | * Start tracing for the UST session. | |
1319 | */ | |
421cb601 DG |
1320 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
1321 | { | |
1322 | int ret = 0; | |
1323 | struct cds_lfht_iter iter; | |
421cb601 | 1324 | struct ust_app *app; |
48842b30 | 1325 | |
421cb601 DG |
1326 | DBG("Starting all UST traces"); |
1327 | ||
1328 | rcu_read_lock(); | |
421cb601 | 1329 | |
5b4a0ec0 | 1330 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
421cb601 | 1331 | ret = ust_app_start_trace(usess, app); |
48842b30 | 1332 | if (ret < 0) { |
5b4a0ec0 DG |
1333 | /* Continue to next apps even on error */ |
1334 | continue; | |
48842b30 | 1335 | } |
48842b30 | 1336 | } |
5b4a0ec0 | 1337 | |
48842b30 DG |
1338 | rcu_read_unlock(); |
1339 | ||
1340 | return 0; | |
1341 | } | |
487cf67c | 1342 | |
8be98f9a MD |
1343 | /* |
1344 | * Start tracing for the UST session. | |
1345 | */ | |
1346 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
1347 | { | |
1348 | int ret = 0; | |
1349 | struct cds_lfht_iter iter; | |
1350 | struct ust_app *app; | |
1351 | ||
1352 | DBG("Stopping all UST traces"); | |
1353 | ||
1354 | rcu_read_lock(); | |
1355 | ||
1356 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1357 | ret = ust_app_stop_trace(usess, app); | |
1358 | if (ret < 0) { | |
1359 | /* Continue to next apps even on error */ | |
1360 | continue; | |
1361 | } | |
1362 | } | |
1363 | ||
1364 | rcu_read_unlock(); | |
1365 | ||
1366 | return 0; | |
1367 | } | |
1368 | ||
84cd17c6 MD |
1369 | /* |
1370 | * Destroy app UST session. | |
1371 | */ | |
1372 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
1373 | { | |
1374 | int ret = 0; | |
1375 | struct cds_lfht_iter iter; | |
1376 | struct ust_app *app; | |
1377 | ||
1378 | DBG("Destroy all UST traces"); | |
1379 | ||
1380 | rcu_read_lock(); | |
1381 | ||
1382 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1383 | ret = ust_app_destroy_trace(usess, app); | |
1384 | if (ret < 0) { | |
1385 | /* Continue to next apps even on error */ | |
1386 | continue; | |
1387 | } | |
1388 | } | |
1389 | ||
1390 | rcu_read_unlock(); | |
1391 | ||
1392 | return 0; | |
1393 | } | |
1394 | ||
5b4a0ec0 DG |
1395 | /* |
1396 | * Add channels/events from UST global domain to registered apps at sock. | |
1397 | */ | |
487cf67c DG |
1398 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
1399 | { | |
1400 | int ret = 0; | |
487cf67c | 1401 | struct cds_lfht_iter iter; |
487cf67c DG |
1402 | struct ust_app *app; |
1403 | struct ust_app_session *ua_sess; | |
1404 | struct ust_app_channel *ua_chan; | |
1405 | struct ust_app_event *ua_event; | |
1f3580c7 DG |
1406 | |
1407 | if (usess == NULL) { | |
5b4a0ec0 | 1408 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
1409 | goto error; |
1410 | } | |
1411 | ||
487cf67c DG |
1412 | DBG2("UST app global update for app sock %d for session uid %d", sock, |
1413 | usess->uid); | |
1414 | ||
284d8f55 DG |
1415 | rcu_read_lock(); |
1416 | ||
487cf67c DG |
1417 | app = find_app_by_sock(sock); |
1418 | if (app == NULL) { | |
1419 | ERR("Failed to update app sock %d", sock); | |
1420 | goto error; | |
1421 | } | |
1422 | ||
421cb601 | 1423 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 1424 | if (ua_sess == NULL) { |
487cf67c DG |
1425 | goto error; |
1426 | } | |
1427 | ||
284d8f55 DG |
1428 | /* |
1429 | * We can iterate safely here over all UST app session sicne the create ust | |
1430 | * app session above made a shadow copy of the UST global domain from the | |
1431 | * ltt ust session. | |
1432 | */ | |
1433 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { | |
1434 | ret = create_ust_channel(app, ua_sess, ua_chan); | |
1435 | if (ret < 0) { | |
1436 | /* FIXME: Should we quit here or continue... */ | |
1437 | continue; | |
487cf67c DG |
1438 | } |
1439 | ||
284d8f55 DG |
1440 | /* For each events */ |
1441 | cds_lfht_for_each_entry(ua_chan->events, &iter, ua_event, node) { | |
1442 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); | |
1443 | if (ret < 0) { | |
1444 | /* FIXME: Should we quit here or continue... */ | |
1445 | continue; | |
487cf67c | 1446 | } |
36dc12cc | 1447 | } |
487cf67c DG |
1448 | } |
1449 | ||
36dc12cc | 1450 | if (usess->start_trace) { |
421cb601 | 1451 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 1452 | if (ret < 0) { |
36dc12cc DG |
1453 | goto error; |
1454 | } | |
1455 | ||
36dc12cc DG |
1456 | DBG2("UST trace started for app pid %d", app->key.pid); |
1457 | } | |
1458 | ||
487cf67c DG |
1459 | error: |
1460 | rcu_read_unlock(); | |
1461 | return; | |
1462 | } |