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 DG |
24 | #include <string.h> |
25 | #include <unistd.h> | |
91d76f53 | 26 | |
1e307fab | 27 | #include <lttngerr.h> |
48842b30 | 28 | #include <lttng-share.h> |
1e307fab | 29 | |
f6a9efaa | 30 | #include "hashtable.h" |
56fff090 | 31 | #include "ust-app.h" |
f6a9efaa | 32 | #include "../hashtable/hash.h" |
48842b30 DG |
33 | #include "ust-ctl.h" |
34 | #include "ust-consumer.h" | |
91d76f53 DG |
35 | |
36 | /* | |
099e26bd | 37 | * Delete a traceable application structure from the global list. |
91d76f53 | 38 | */ |
f6a9efaa | 39 | static void delete_ust_app(struct ust_app *lta) |
91d76f53 | 40 | { |
f6a9efaa DG |
41 | int ret; |
42 | struct cds_lfht_node *node; | |
43 | struct cds_lfht_iter iter; | |
44d3bd01 | 44 | |
f6a9efaa | 45 | rcu_read_lock(); |
44d3bd01 | 46 | |
48842b30 | 47 | free(lta->sessions); |
f6a9efaa | 48 | close(lta->key.sock); |
56fff090 | 49 | |
f6a9efaa DG |
50 | /* Remove from apps hash table */ |
51 | node = hashtable_lookup(ust_app_ht, | |
52 | (void *) ((unsigned long) lta->key.pid), sizeof(void *), &iter); | |
53 | if (node == NULL) { | |
54 | ERR("UST app pid %d not found in hash table", lta->key.pid); | |
55 | } else { | |
56 | ret = hashtable_del(ust_app_ht, &iter); | |
57 | if (ret) { | |
58 | ERR("UST app unable to delete app %d from hash table", | |
59 | lta->key.pid); | |
60 | } else { | |
61 | DBG2("UST app pid %d deleted", lta->key.pid); | |
56fff090 DG |
62 | } |
63 | } | |
64 | ||
f6a9efaa DG |
65 | /* Remove from key hash table */ |
66 | node = hashtable_lookup(ust_app_sock_key_map, | |
67 | (void *) ((unsigned long) lta->key.sock), sizeof(void *), &iter); | |
68 | if (node == NULL) { | |
69 | ERR("UST app key %d not found in key hash table", lta->key.sock); | |
70 | } else { | |
71 | ret = hashtable_del(ust_app_sock_key_map, &iter); | |
72 | if (ret) { | |
73 | ERR("UST app unable to delete app sock %d from key hash table", | |
74 | lta->key.sock); | |
75 | } else { | |
76 | DBG2("UST app pair sock %d key %d deleted", | |
77 | lta->key.sock, lta->key.pid); | |
78 | } | |
79 | } | |
80 | ||
81 | free(lta); | |
82 | ||
83 | rcu_read_unlock(); | |
099e26bd DG |
84 | } |
85 | ||
86 | /* | |
f6a9efaa | 87 | * URCU intermediate call to delete an UST app. |
099e26bd | 88 | */ |
f6a9efaa | 89 | static void delete_ust_app_rcu(struct rcu_head *head) |
099e26bd | 90 | { |
f6a9efaa DG |
91 | struct cds_lfht_node *node = |
92 | caa_container_of(head, struct cds_lfht_node, head); | |
93 | struct ust_app *app = | |
94 | caa_container_of(node, struct ust_app, node); | |
95 | ||
96 | delete_ust_app(app); | |
099e26bd DG |
97 | } |
98 | ||
99 | /* | |
f6a9efaa | 100 | * Find an ust_app using the sock and return it. |
099e26bd | 101 | */ |
f6a9efaa | 102 | static struct ust_app *find_app_by_sock(int sock) |
099e26bd | 103 | { |
f6a9efaa DG |
104 | struct cds_lfht_node *node; |
105 | struct ust_app_key *key; | |
106 | struct cds_lfht_iter iter; | |
f6a9efaa DG |
107 | |
108 | rcu_read_lock(); | |
109 | ||
110 | node = hashtable_lookup(ust_app_sock_key_map, | |
111 | (void *)((unsigned long) sock), sizeof(void *), &iter); | |
112 | if (node == NULL) { | |
113 | DBG2("UST app find by sock %d key not found", sock); | |
114 | rcu_read_unlock(); | |
115 | goto error; | |
116 | } | |
117 | ||
118 | key = caa_container_of(node, struct ust_app_key, node); | |
119 | ||
120 | node = hashtable_lookup(ust_app_ht, | |
121 | (void *)((unsigned long) key->pid), sizeof(void *), &iter); | |
122 | if (node == NULL) { | |
123 | DBG2("UST app find by sock %d not found", sock); | |
124 | rcu_read_unlock(); | |
125 | goto error; | |
126 | } | |
127 | rcu_read_unlock(); | |
128 | ||
129 | return caa_container_of(node, struct ust_app, node); | |
130 | ||
131 | error: | |
132 | return NULL; | |
099e26bd DG |
133 | } |
134 | ||
135 | /* | |
f6a9efaa | 136 | * Return pointer to traceable apps list. |
099e26bd | 137 | */ |
f6a9efaa | 138 | struct cds_lfht *ust_app_get_ht(void) |
099e26bd | 139 | { |
f6a9efaa | 140 | return ust_app_ht; |
91d76f53 DG |
141 | } |
142 | ||
0177d773 | 143 | /* |
f6a9efaa | 144 | * Return ust app pointer or NULL if not found. |
0177d773 | 145 | */ |
f6a9efaa | 146 | struct ust_app *ust_app_find_by_pid(pid_t pid) |
0177d773 | 147 | { |
f6a9efaa DG |
148 | struct cds_lfht_node *node; |
149 | struct cds_lfht_iter iter; | |
0177d773 | 150 | |
f6a9efaa DG |
151 | rcu_read_lock(); |
152 | node = hashtable_lookup(ust_app_ht, | |
153 | (void *)((unsigned long) pid), sizeof(void *), &iter); | |
154 | if (node == NULL) { | |
155 | rcu_read_unlock(); | |
156 | DBG2("UST app no found with pid %d", pid); | |
157 | goto error; | |
0177d773 | 158 | } |
f6a9efaa | 159 | rcu_read_unlock(); |
0177d773 | 160 | |
f6a9efaa | 161 | DBG2("Found UST app by pid %d", pid); |
44d3bd01 | 162 | |
f6a9efaa DG |
163 | return caa_container_of(node, struct ust_app, node); |
164 | ||
165 | error: | |
0177d773 DG |
166 | return NULL; |
167 | } | |
168 | ||
91d76f53 | 169 | /* |
56fff090 | 170 | * Using pid and uid (of the app), allocate a new ust_app struct and |
050349bb | 171 | * add it to the global traceable app list. |
91d76f53 | 172 | * |
050349bb | 173 | * On success, return 0, else return malloc ENOMEM. |
91d76f53 | 174 | */ |
56fff090 | 175 | int ust_app_register(struct ust_register_msg *msg, int sock) |
91d76f53 | 176 | { |
56fff090 | 177 | struct ust_app *lta; |
91d76f53 | 178 | |
56fff090 | 179 | lta = malloc(sizeof(struct ust_app)); |
91d76f53 | 180 | if (lta == NULL) { |
48842b30 | 181 | PERROR("malloc"); |
91d76f53 DG |
182 | return -ENOMEM; |
183 | } | |
184 | ||
099e26bd DG |
185 | lta->uid = msg->uid; |
186 | lta->gid = msg->gid; | |
f6a9efaa | 187 | lta->key.pid = msg->pid; |
099e26bd DG |
188 | lta->ppid = msg->ppid; |
189 | lta->v_major = msg->major; | |
190 | lta->v_minor = msg->minor; | |
f6a9efaa | 191 | lta->key.sock = sock; |
099e26bd DG |
192 | strncpy(lta->name, msg->name, sizeof(lta->name)); |
193 | lta->name[16] = '\0'; | |
f6a9efaa DG |
194 | hashtable_node_init(<a->node, (void *)((unsigned long)lta->key.pid), |
195 | sizeof(void *)); | |
48842b30 DG |
196 | |
197 | /* Session hashtable */ | |
198 | lta->sessions = hashtable_new(0); | |
f6a9efaa DG |
199 | |
200 | /* Set sock key map */ | |
201 | hashtable_node_init(<a->key.node, (void *)((unsigned long)lta->key.sock), | |
202 | sizeof(void *)); | |
099e26bd | 203 | |
f6a9efaa DG |
204 | rcu_read_lock(); |
205 | hashtable_add_unique(ust_app_ht, <a->node); | |
206 | hashtable_add_unique(ust_app_sock_key_map, <a->key.node); | |
207 | rcu_read_unlock(); | |
099e26bd DG |
208 | |
209 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
f6a9efaa DG |
210 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, |
211 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
91d76f53 DG |
212 | |
213 | return 0; | |
214 | } | |
215 | ||
216 | /* | |
050349bb DG |
217 | * Unregister app by removing it from the global traceable app list and freeing |
218 | * the data struct. | |
099e26bd DG |
219 | * |
220 | * The socket is already closed at this point so no close to sock. | |
91d76f53 | 221 | */ |
56fff090 | 222 | void ust_app_unregister(int sock) |
91d76f53 | 223 | { |
56fff090 | 224 | struct ust_app *lta; |
91d76f53 | 225 | |
f6a9efaa DG |
226 | DBG2("UST app unregistering sock %d", sock); |
227 | ||
099e26bd DG |
228 | lta = find_app_by_sock(sock); |
229 | if (lta) { | |
f6a9efaa DG |
230 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); |
231 | /* FIXME: Better use a call_rcu here ? */ | |
232 | delete_ust_app(lta); | |
91d76f53 DG |
233 | } |
234 | } | |
235 | ||
236 | /* | |
050349bb | 237 | * Return traceable_app_count |
91d76f53 | 238 | */ |
f6a9efaa | 239 | unsigned long ust_app_list_count(void) |
91d76f53 | 240 | { |
f6a9efaa | 241 | unsigned long count; |
91d76f53 | 242 | |
f6a9efaa DG |
243 | rcu_read_lock(); |
244 | count = hashtable_get_count(ust_app_ht); | |
245 | rcu_read_unlock(); | |
91d76f53 | 246 | |
099e26bd | 247 | return count; |
91d76f53 DG |
248 | } |
249 | ||
250 | /* | |
099e26bd | 251 | * Free and clean all traceable apps of the global list. |
91d76f53 | 252 | */ |
56fff090 | 253 | void ust_app_clean_list(void) |
91d76f53 | 254 | { |
f6a9efaa DG |
255 | int ret; |
256 | struct cds_lfht_node *node; | |
257 | struct cds_lfht_iter iter; | |
258 | ||
259 | DBG2("UST app clean hash table"); | |
260 | ||
261 | rcu_read_lock(); | |
262 | ||
263 | hashtable_get_first(ust_app_ht, &iter); | |
264 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
265 | ret = hashtable_del(ust_app_ht, &iter); | |
266 | if (!ret) { | |
267 | call_rcu(&node->head, delete_ust_app_rcu); | |
268 | } | |
269 | hashtable_get_next(ust_app_ht, &iter); | |
91d76f53 | 270 | } |
f6a9efaa DG |
271 | |
272 | rcu_read_unlock(); | |
273 | } | |
274 | ||
275 | /* | |
276 | * Init UST app hash table. | |
277 | */ | |
278 | void ust_app_ht_alloc(void) | |
279 | { | |
280 | ust_app_ht = hashtable_new(0); | |
281 | ust_app_sock_key_map = hashtable_new(0); | |
91d76f53 | 282 | } |
48842b30 DG |
283 | |
284 | /* | |
285 | * Alloc new UST app session. | |
286 | */ | |
287 | static struct ust_app_session *alloc_app_session(void) | |
288 | { | |
289 | struct ust_app_session *ua_sess; | |
290 | ||
291 | ua_sess = zmalloc(sizeof(struct ust_app_session)); | |
292 | if (ua_sess == NULL) { | |
293 | PERROR("malloc"); | |
294 | goto error; | |
295 | } | |
296 | ||
297 | ua_sess->enabled = 0; | |
298 | ua_sess->handle = -1; | |
299 | ua_sess->channels = hashtable_new_str(0); | |
300 | ua_sess->metadata = NULL; | |
301 | ua_sess->obj = NULL; | |
302 | ||
303 | return ua_sess; | |
304 | ||
305 | error: | |
306 | return NULL; | |
307 | } | |
308 | ||
309 | static struct ust_app_channel *alloc_app_channel(char *name) | |
310 | { | |
311 | struct ust_app_channel *ua_chan; | |
312 | ||
313 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); | |
314 | if (ua_chan == NULL) { | |
315 | PERROR("malloc"); | |
316 | goto error; | |
317 | } | |
318 | ||
319 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
320 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
321 | ua_chan->enabled = 0; | |
322 | ua_chan->handle = -1; | |
323 | ua_chan->obj = NULL; | |
324 | ua_chan->ctx = hashtable_new(0); | |
5af2f756 | 325 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); |
48842b30 DG |
326 | ua_chan->events = hashtable_new_str(0); |
327 | hashtable_node_init(&ua_chan->node, (void *) ua_chan->name, | |
328 | strlen(ua_chan->name)); | |
329 | ||
330 | DBG3("UST app channel %s allocated", ua_chan->name); | |
331 | ||
332 | return ua_chan; | |
333 | ||
334 | error: | |
335 | return NULL; | |
336 | } | |
337 | ||
338 | static struct ust_app_event *alloc_app_event(char *name) | |
339 | { | |
340 | struct ust_app_event *ua_event; | |
341 | ||
342 | ua_event = zmalloc(sizeof(struct ust_app_event)); | |
343 | if (ua_event == NULL) { | |
344 | PERROR("malloc"); | |
345 | goto error; | |
346 | } | |
347 | ||
348 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
349 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
350 | ua_event->ctx = hashtable_new(0); | |
351 | hashtable_node_init(&ua_event->node, (void *) ua_event->name, | |
352 | strlen(ua_event->name)); | |
353 | ||
354 | DBG3("UST app event %s allocated", ua_event->name); | |
355 | ||
356 | return ua_event; | |
357 | ||
358 | error: | |
359 | return NULL; | |
360 | } | |
361 | ||
362 | static void shallow_copy_event(struct ust_app_event *ua_event, | |
363 | struct ltt_ust_event *uevent) | |
364 | { | |
365 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); | |
366 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
367 | ||
368 | /* TODO: support copy context */ | |
369 | } | |
370 | ||
371 | static void shallow_copy_channel(struct ust_app_channel *ua_chan, | |
372 | struct ltt_ust_channel *uchan) | |
373 | { | |
374 | struct cds_lfht_iter iter; | |
375 | struct cds_lfht_node *node, *ua_event_node; | |
376 | struct ltt_ust_event *uevent; | |
377 | struct ust_app_event *ua_event; | |
378 | ||
379 | DBG2("Shallow copy of UST app channel %s", ua_chan->name); | |
380 | ||
381 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
382 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
383 | ||
384 | /* TODO: support copy context */ | |
385 | ||
386 | hashtable_get_first(uchan->events, &iter); | |
387 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
388 | uevent = caa_container_of(node, struct ltt_ust_event, node); | |
389 | ||
390 | ua_event_node = hashtable_lookup(ua_chan->events, | |
391 | (void *) uevent->attr.name, strlen(uevent->attr.name), &iter); | |
392 | if (ua_event_node == NULL) { | |
393 | DBG2("UST event %s not found on shallow copy channel", | |
394 | uevent->attr.name); | |
395 | ua_event = alloc_app_event(uevent->attr.name); | |
396 | if (ua_event == NULL) { | |
397 | continue; | |
398 | } | |
399 | hashtable_add_unique(ua_chan->events, &ua_event->node); | |
400 | } else { | |
401 | ua_event = caa_container_of(node, struct ust_app_event, node); | |
402 | } | |
403 | ||
404 | shallow_copy_event(ua_event, uevent); | |
405 | ||
406 | /* Get next UST events */ | |
407 | hashtable_get_next(uchan->events, &iter); | |
408 | } | |
409 | ||
410 | DBG3("Shallow copy channel done"); | |
411 | } | |
412 | ||
413 | static void shallow_copy_session(struct ust_app_session *ua_sess, | |
414 | struct ltt_ust_session *usess) | |
415 | { | |
416 | struct cds_lfht_node *node, *ua_chan_node; | |
417 | struct cds_lfht_iter iter; | |
418 | struct ltt_ust_channel *uchan; | |
419 | struct ust_app_channel *ua_chan; | |
420 | ||
421 | DBG2("Shallow copy of session handle"); | |
422 | ||
423 | ua_sess->uid = usess->uid; | |
424 | ||
425 | /* TODO: support all UST domain */ | |
426 | ||
427 | /* Iterate over all channels in global domain. */ | |
428 | hashtable_get_first(usess->domain_global.channels, &iter); | |
429 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
430 | uchan = caa_container_of(node, struct ltt_ust_channel, node); | |
431 | ||
432 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
433 | (void *) uchan->name, strlen(uchan->name), &iter); | |
434 | if (ua_chan_node == NULL) { | |
435 | DBG2("Channel %s not found on shallow session copy, creating it", | |
436 | uchan->name); | |
437 | ua_chan = alloc_app_channel(uchan->name); | |
438 | if (ua_chan == NULL) { | |
439 | /* malloc failed... continuing */ | |
440 | continue; | |
441 | } | |
442 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
443 | } else { | |
444 | ua_chan = caa_container_of(node, struct ust_app_channel, node); | |
445 | } | |
446 | ||
447 | shallow_copy_channel(ua_chan, uchan); | |
448 | ||
449 | /* Next item in hash table */ | |
450 | hashtable_get_next(usess->domain_global.channels, &iter); | |
451 | } | |
452 | } | |
453 | ||
454 | static struct ust_app_session *lookup_session_by_app( | |
455 | struct ltt_ust_session *usess, struct ust_app *app) | |
456 | { | |
457 | struct cds_lfht_iter iter; | |
458 | struct cds_lfht_node *node; | |
459 | ||
460 | /* Get right UST app session from app */ | |
461 | node = hashtable_lookup(app->sessions, | |
462 | (void *) ((unsigned long) usess->uid), | |
463 | sizeof(void *), &iter); | |
464 | if (node == NULL) { | |
465 | goto error; | |
466 | } | |
467 | ||
468 | return caa_container_of(node, struct ust_app_session, node); | |
469 | ||
470 | error: | |
471 | return NULL; | |
472 | } | |
473 | ||
474 | int ust_app_add_channel(struct ltt_ust_session *usess, | |
475 | struct ltt_ust_channel *uchan) | |
476 | { | |
477 | int ret = 0; | |
478 | struct cds_lfht_iter iter; | |
479 | struct cds_lfht_node *node, *ua_chan_node; | |
480 | struct ust_app *app; | |
481 | struct ust_app_session *ua_sess; | |
482 | struct ust_app_channel *ua_chan; | |
483 | ||
484 | DBG2("UST app adding channel %s to global domain for session uid %d", | |
485 | uchan->name, usess->uid); | |
486 | ||
487 | rcu_read_lock(); | |
488 | hashtable_get_first(ust_app_ht, &iter); | |
489 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
490 | app = caa_container_of(node, struct ust_app, node); | |
491 | ||
492 | ua_sess = lookup_session_by_app(usess, app); | |
493 | if (ua_sess == NULL) { | |
494 | DBG2("UST app pid: %d session uid %d not found, creating one", | |
495 | app->key.pid, usess->uid); | |
496 | ua_sess = alloc_app_session(); | |
497 | if (ua_sess == NULL) { | |
498 | /* Only malloc can failed so something is really wrong */ | |
499 | goto next; | |
500 | } | |
501 | shallow_copy_session(ua_sess, usess); | |
502 | } | |
503 | ||
504 | if (ua_sess->handle == -1) { | |
505 | ret = ustctl_create_session(app->key.sock); | |
506 | if (ret < 0) { | |
507 | DBG("Error creating session for app pid %d, sock %d", | |
508 | app->key.pid, app->key.sock); | |
509 | /* TODO: free() ua_sess */ | |
510 | goto next; | |
511 | } | |
512 | ||
513 | DBG2("UST app ustctl create session handle %d", ret); | |
514 | ua_sess->handle = ret; | |
515 | ||
516 | /* Add ust app session to app's HT */ | |
517 | hashtable_node_init(&ua_sess->node, | |
518 | (void *)((unsigned long) ua_sess->uid), sizeof(void *)); | |
519 | hashtable_add_unique(app->sessions, &ua_sess->node); | |
520 | } | |
521 | ||
522 | /* Lookup channel in the ust app session */ | |
523 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
524 | (void *) uchan->name, strlen(uchan->name), &iter); | |
525 | if (ua_chan_node == NULL) { | |
526 | ERR("Channel suppose to be present with the above shallow " | |
527 | "session copy. Continuing..."); | |
528 | goto next; | |
529 | } | |
530 | ||
531 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
532 | ||
533 | /* TODO: remove cast and use lttng-ust-abi.h */ | |
534 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
535 | (struct lttng_ust_channel_attr *)&uchan->attr, &ua_chan->obj); | |
536 | if (ret < 0) { | |
537 | DBG("Error creating channel %s for app (pid: %d, sock: %d) " | |
538 | "and session handle %d with ret %d", | |
539 | uchan->name, app->key.pid, app->key.sock, | |
540 | ua_sess->handle, ret); | |
541 | goto next; | |
542 | } | |
543 | ||
544 | ua_chan->handle = ua_chan->obj->handle; | |
545 | ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; | |
546 | ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; | |
547 | ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; | |
548 | ||
549 | DBG2("Channel %s UST create successfully for pid:%d and sock:%d", | |
550 | uchan->name, app->key.pid, app->key.sock); | |
551 | ||
552 | next: | |
553 | /* Next applications */ | |
554 | hashtable_get_next(ust_app_ht, &iter); | |
555 | } | |
556 | rcu_read_unlock(); | |
557 | ||
558 | return ret; | |
559 | } | |
560 | ||
561 | int ust_app_add_event(struct ltt_ust_session *usess, | |
562 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
563 | { | |
564 | int ret = 0; | |
565 | struct cds_lfht_iter iter; | |
566 | struct cds_lfht_node *node, *ua_chan_node, *ua_event_node; | |
567 | struct ust_app *app; | |
568 | struct ust_app_session *ua_sess; | |
569 | struct ust_app_channel *ua_chan; | |
570 | struct ust_app_event *ua_event; | |
571 | struct lttng_ust_event ltt_uevent; | |
13161846 | 572 | struct lttng_ust_object_data *obj_event; |
48842b30 DG |
573 | |
574 | DBG2("UST app adding event %s to global domain for session uid %d", | |
575 | uevent->attr.name, usess->uid); | |
576 | ||
577 | rcu_read_lock(); | |
578 | hashtable_get_first(ust_app_ht, &iter); | |
579 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
580 | app = caa_container_of(node, struct ust_app, node); | |
581 | ||
582 | ua_sess = lookup_session_by_app(usess, app); | |
583 | if (ua_sess == NULL) { | |
584 | DBG2("UST app (pid: %d, sock: %d) session not found, creating one", | |
585 | app->key.pid, app->key.sock); | |
586 | ua_sess = alloc_app_session(); | |
587 | if (ua_sess == NULL) { | |
588 | /* Only malloc can failed so something is really wrong */ | |
589 | goto next; | |
590 | } | |
591 | shallow_copy_session(ua_sess, usess); | |
592 | } | |
593 | ||
594 | if (ua_sess->handle == -1) { | |
595 | ret = ustctl_create_session(app->key.sock); | |
596 | if (ret < 0) { | |
597 | DBG("Error creating session for app pid %d, sock %d", | |
598 | app->key.pid, app->key.sock); | |
599 | /* TODO: free() ua_sess */ | |
600 | goto next; | |
601 | } | |
602 | ||
603 | DBG2("UST app ustctl create session handle %d", ret); | |
604 | ua_sess->handle = ret; | |
605 | /* Add ust app session to app's HT */ | |
606 | hashtable_node_init(&ua_sess->node, | |
607 | (void *)((unsigned long) ua_sess->uid), sizeof(void *)); | |
608 | hashtable_add_unique(app->sessions, &ua_sess->node); | |
609 | } | |
610 | ||
611 | /* Lookup channel in the ust app session */ | |
612 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
613 | (void *) uchan->name, strlen(uchan->name), &iter); | |
614 | if (ua_chan_node == NULL) { | |
615 | ERR("Channel suppose to be present with the above shallow " | |
616 | "session copy. Continuing..."); | |
617 | goto next; | |
618 | } | |
619 | ||
620 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
621 | ||
622 | /* Prepare lttng ust event */ | |
623 | strncpy(ltt_uevent.name, uevent->attr.name, sizeof(ltt_uevent.name)); | |
624 | ltt_uevent.name[sizeof(ltt_uevent.name) - 1] = '\0'; | |
625 | /* TODO: adjust to other instrumentation types */ | |
626 | ltt_uevent.instrumentation = LTTNG_UST_TRACEPOINT; | |
627 | ||
628 | /* Get event node */ | |
629 | ua_event_node = hashtable_lookup(ua_chan->events, | |
630 | (void *) uevent->attr.name, strlen(uevent->attr.name), &iter); | |
631 | if (ua_event_node == NULL) { | |
632 | DBG2("UST app event %s not found, creating one", uevent->attr.name); | |
633 | /* Does not exist so create one */ | |
634 | ua_event = alloc_app_event(uevent->attr.name); | |
635 | if (ua_event == NULL) { | |
636 | /* Only malloc can failed so something is really wrong */ | |
637 | goto next; | |
638 | } | |
639 | ||
640 | shallow_copy_event(ua_event, uevent); | |
641 | ||
642 | /* Create UST event on tracer */ | |
643 | ret = ustctl_create_event(app->key.sock, <t_uevent, ua_chan->obj, | |
644 | &obj_event); | |
645 | if (ret < 0) { | |
646 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
647 | uevent->attr.name, app->key.pid, ret); | |
648 | /* TODO: free() ua_event and obj_event */ | |
649 | goto next; | |
650 | } | |
651 | ua_event->obj = obj_event; | |
652 | ua_event->handle = obj_event->handle; | |
653 | ua_event->enabled = 1; | |
654 | } else { | |
655 | ua_event = caa_container_of(ua_event_node, | |
656 | struct ust_app_event, node); | |
657 | ||
658 | if (ua_event->enabled == 0) { | |
659 | ret = ustctl_enable(app->key.sock, ua_event->obj); | |
660 | if (ret < 0) { | |
661 | ERR("Error ustctl enable event %s for app " | |
662 | "pid: %d with ret %d", uevent->attr.name, | |
663 | app->key.pid, ret); | |
664 | goto next; | |
665 | } | |
666 | ua_event->enabled = 1; | |
667 | } | |
668 | } | |
669 | ||
670 | hashtable_add_unique(ua_chan->events, &ua_event->node); | |
671 | ||
672 | DBG2("Event %s UST create successfully for pid:%d", uevent->attr.name, | |
673 | app->key.pid); | |
674 | ||
675 | next: | |
676 | /* Next applications */ | |
677 | hashtable_get_next(ust_app_ht, &iter); | |
678 | } | |
679 | rcu_read_unlock(); | |
680 | ||
681 | return ret; | |
682 | } | |
683 | ||
684 | int ust_app_start_trace(struct ltt_ust_session *usess) | |
685 | { | |
686 | int ret = 0; | |
687 | struct cds_lfht_iter iter; | |
688 | struct cds_lfht_node *node, *ua_chan_node; | |
689 | struct ust_app *app; | |
690 | struct ust_app_session *ua_sess; | |
691 | struct ust_app_channel *ua_chan; | |
692 | struct lttng_ust_channel_attr uattr; | |
693 | struct ltt_ust_channel *uchan; | |
694 | ||
695 | rcu_read_lock(); | |
696 | hashtable_get_first(ust_app_ht, &iter); | |
697 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
698 | app = caa_container_of(node, struct ust_app, node); | |
699 | ||
700 | ua_sess = lookup_session_by_app(usess, app); | |
701 | if (ua_sess == NULL) { | |
702 | /* Only malloc can failed so something is really wrong */ | |
703 | goto next; | |
704 | } | |
705 | ||
706 | if (ua_sess->metadata == NULL) { | |
707 | /* Allocate UST metadata */ | |
708 | ua_sess->metadata = trace_ust_create_metadata(usess->pathname); | |
709 | if (ua_sess->metadata == NULL) { | |
710 | ERR("UST app session %d creating metadata failed", | |
711 | ua_sess->handle); | |
712 | goto next; | |
713 | } | |
714 | ||
715 | uattr.overwrite = ua_sess->metadata->attr.overwrite; | |
716 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
717 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
718 | uattr.switch_timer_interval = | |
719 | ua_sess->metadata->attr.switch_timer_interval; | |
720 | uattr.read_timer_interval = | |
721 | ua_sess->metadata->attr.read_timer_interval; | |
722 | uattr.output = ua_sess->metadata->attr.output; | |
723 | ||
724 | /* UST tracer metadata creation */ | |
725 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
726 | &ua_sess->metadata->obj); | |
727 | if (ret < 0) { | |
728 | ERR("UST app open metadata failed for app pid:%d", | |
729 | app->key.pid); | |
730 | goto next; | |
731 | } | |
732 | ||
733 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
734 | } | |
735 | ||
736 | /* Open UST metadata stream */ | |
737 | if (ua_sess->metadata->stream_obj == NULL) { | |
738 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, | |
739 | &ua_sess->metadata->stream_obj); | |
740 | if (ret < 0) { | |
741 | ERR("UST create metadata stream failed"); | |
742 | goto next; | |
743 | } | |
744 | ||
745 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, "%s/%s", | |
746 | usess->pathname, "metadata"); | |
747 | if (ret < 0) { | |
748 | PERROR("asprintf UST create stream"); | |
749 | goto next; | |
750 | } | |
751 | ||
752 | DBG2("UST metadata stream object created for app pid %d", | |
753 | app->key.pid); | |
754 | } | |
755 | ||
756 | /* For each channel */ | |
757 | hashtable_get_first(usess->domain_global.channels, &iter); | |
758 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
759 | uchan = caa_container_of(node, struct ltt_ust_channel, node); | |
760 | ||
761 | /* Lookup channel in the ust app session */ | |
762 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
763 | (void *) uchan->name, strlen(uchan->name), &iter); | |
764 | if (ua_chan_node == NULL) { | |
765 | ERR("Channel suppose to be present with the above shallow " | |
766 | "session copy. Continuing..."); | |
767 | goto next; | |
768 | } | |
769 | ||
770 | ua_chan = caa_container_of(ua_chan_node, | |
771 | struct ust_app_channel, node); | |
772 | ||
a220deea MD |
773 | for (;;) { |
774 | struct lttng_ust_object_data *obj; | |
775 | struct ltt_ust_stream *ustream; | |
48842b30 | 776 | |
a220deea MD |
777 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
778 | &obj); | |
779 | if (ret < 0) { | |
780 | /* Got all streams */ | |
781 | goto next_chan; | |
782 | } | |
48842b30 | 783 | |
a220deea MD |
784 | ustream = malloc(sizeof(*ustream)); |
785 | if (ustream == NULL) { | |
786 | goto next_chan; | |
787 | } | |
788 | memset(ustream, 0, sizeof(struct ltt_ust_stream)); | |
789 | ustream->obj = obj; | |
790 | ustream->handle = ustream->obj->handle; | |
5af2f756 MD |
791 | /* Order is important */ |
792 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
793 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", | |
a220deea | 794 | uchan->pathname, uchan->name, |
5af2f756 | 795 | ua_chan->streams.count++); |
a220deea MD |
796 | if (ret < 0) { |
797 | PERROR("asprintf UST create stream"); | |
798 | goto next_chan; | |
799 | } | |
48842b30 DG |
800 | } |
801 | ||
802 | next_chan: | |
803 | /* Next applications */ | |
804 | hashtable_get_next(ua_sess->channels, &iter); | |
805 | } | |
806 | ||
807 | /* Setup UST consumer socket and send fds to it */ | |
48842b30 DG |
808 | ret = ust_consumer_send_session(usess->consumer_fd, ua_sess); |
809 | if (ret < 0) { | |
810 | goto next; | |
811 | } | |
812 | ||
813 | /* This start the UST tracing */ | |
814 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
815 | if (ret < 0) { | |
816 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
817 | goto next; | |
818 | } | |
819 | ||
820 | /* Quiescent wait after starting trace */ | |
821 | ustctl_wait_quiescent(app->key.sock); | |
822 | next: | |
823 | /* Next applications */ | |
824 | hashtable_get_next(ust_app_ht, &iter); | |
825 | } | |
826 | rcu_read_unlock(); | |
827 | ||
828 | return 0; | |
829 | } | |
487cf67c DG |
830 | |
831 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) | |
832 | { | |
833 | int ret = 0; | |
834 | int session_existed = 1; | |
835 | struct cds_lfht_iter iter; | |
836 | struct cds_lfht_node *node, *ua_chan_node; | |
837 | struct ust_app *app; | |
838 | struct ust_app_session *ua_sess; | |
839 | struct ust_app_channel *ua_chan; | |
840 | struct ust_app_event *ua_event; | |
841 | struct lttng_ust_event ltt_uevent; | |
842 | struct ltt_ust_channel *uchan; | |
843 | struct lttng_ust_object_data *obj_event; | |
844 | ||
845 | DBG2("UST app global update for app sock %d for session uid %d", sock, | |
846 | usess->uid); | |
847 | ||
848 | rcu_read_lock(); | |
849 | app = find_app_by_sock(sock); | |
850 | if (app == NULL) { | |
851 | ERR("Failed to update app sock %d", sock); | |
852 | goto error; | |
853 | } | |
854 | ||
855 | ua_sess = lookup_session_by_app(usess, app); | |
856 | if (ua_sess == NULL) { | |
857 | DBG2("UST app pid: %d session uid %d not found, creating one", | |
858 | app->key.pid, usess->uid); | |
859 | ua_sess = alloc_app_session(); | |
860 | if (ua_sess == NULL) { | |
861 | /* Only malloc can failed so something is really wrong */ | |
862 | goto error; | |
863 | } | |
864 | shallow_copy_session(ua_sess, usess); | |
865 | session_existed= 0; | |
866 | } | |
867 | ||
868 | if (ua_sess->handle == -1) { | |
869 | ret = ustctl_create_session(app->key.sock); | |
870 | if (ret < 0) { | |
871 | DBG("Error creating session for app pid %d, sock %d", | |
872 | app->key.pid, app->key.sock); | |
873 | /* TODO: free() ua_sess */ | |
874 | goto error; | |
875 | } | |
876 | ||
877 | DBG2("UST app ustctl create session handle %d", ret); | |
878 | ua_sess->handle = ret; | |
879 | ||
880 | /* Add ust app session to app's HT */ | |
881 | hashtable_node_init(&ua_sess->node, | |
882 | (void *)((unsigned long) ua_sess->uid), sizeof(void *)); | |
883 | hashtable_add_unique(app->sessions, &ua_sess->node); | |
884 | } | |
885 | ||
886 | if (session_existed) { | |
887 | goto error; | |
888 | } | |
889 | ||
890 | /* Iterate over all channels */ | |
891 | hashtable_get_first(usess->domain_global.channels, &iter); | |
892 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
893 | uchan = caa_container_of(node, struct ltt_ust_channel, node); | |
894 | ||
895 | /* Lookup channel in the ust app session */ | |
896 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
897 | (void *) uchan->name, strlen(uchan->name), &iter); | |
898 | if (ua_chan_node == NULL) { | |
899 | ERR("UST app channel not found for uchan %s", uchan->name); | |
900 | goto next_chan; | |
901 | } | |
902 | ||
903 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
904 | ||
905 | /* TODO: remove cast and use lttng-ust-abi.h */ | |
906 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
907 | (struct lttng_ust_channel_attr *)&uchan->attr, &ua_chan->obj); | |
908 | if (ret < 0) { | |
909 | DBG("Error creating channel %s for app (pid: %d, sock: %d) " | |
910 | "and session handle %d with ret %d", | |
911 | uchan->name, app->key.pid, app->key.sock, | |
912 | ua_sess->handle, ret); | |
913 | goto next_chan; | |
914 | } | |
915 | ||
916 | ua_chan->handle = ua_chan->obj->handle; | |
917 | ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; | |
918 | ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; | |
919 | ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; | |
920 | ||
921 | DBG2("Channel %s UST create successfully for pid:%d and sock:%d", | |
922 | uchan->name, app->key.pid, app->key.sock); | |
923 | ||
924 | /* For each event(s) of that channel */ | |
925 | hashtable_get_first(ua_chan->events, &iter); | |
926 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
927 | ua_event = caa_container_of(node, struct ust_app_event, node); | |
928 | ||
929 | /* Prepare lttng ust event */ | |
930 | memset(<t_uevent, 0, sizeof(ltt_uevent)); | |
931 | strncpy(ltt_uevent.name, ua_event->name, sizeof(ltt_uevent.name)); | |
932 | ltt_uevent.name[sizeof(ltt_uevent.name) - 1] = '\0'; | |
933 | ||
934 | /* TODO: adjust to other instrumentation types */ | |
935 | ltt_uevent.instrumentation = LTTNG_UST_TRACEPOINT; | |
936 | ||
937 | /* Create UST event on tracer */ | |
938 | ret = ustctl_create_event(app->key.sock, <t_uevent, ua_chan->obj, | |
939 | &obj_event); | |
940 | if (ret < 0) { | |
941 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
942 | ua_event->name, app->key.pid, ret); | |
943 | /* TODO: free() ua_event and obj_event */ | |
944 | goto next_event; | |
945 | } | |
946 | ||
947 | ua_event->obj = obj_event; | |
948 | ua_event->handle = obj_event->handle; | |
949 | ua_event->enabled = 1; | |
950 | ||
951 | DBG2("Event %s UST create successfully for pid:%d", | |
952 | ua_event->name, app->key.pid); | |
953 | ||
954 | next_event: | |
955 | hashtable_get_next(ua_chan->events, &iter); | |
956 | } | |
957 | ||
958 | next_chan: | |
959 | /* Next applications */ | |
960 | hashtable_get_next(ua_sess->channels, &iter); | |
961 | } | |
962 | ||
963 | error: | |
964 | rcu_read_unlock(); | |
965 | return; | |
966 | } |