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 | |
1e307fab | 29 | #include <lttngerr.h> |
48842b30 | 30 | #include <lttng-share.h> |
1e307fab | 31 | |
f6a9efaa | 32 | #include "hashtable.h" |
56fff090 | 33 | #include "ust-app.h" |
f6a9efaa | 34 | #include "../hashtable/hash.h" |
48842b30 DG |
35 | #include "ust-ctl.h" |
36 | #include "ust-consumer.h" | |
91d76f53 DG |
37 | |
38 | /* | |
099e26bd | 39 | * Delete a traceable application structure from the global list. |
91d76f53 | 40 | */ |
f6a9efaa | 41 | static void delete_ust_app(struct ust_app *lta) |
91d76f53 | 42 | { |
f6a9efaa DG |
43 | int ret; |
44 | struct cds_lfht_node *node; | |
45 | struct cds_lfht_iter iter; | |
44d3bd01 | 46 | |
f6a9efaa | 47 | rcu_read_lock(); |
44d3bd01 | 48 | |
421cb601 | 49 | /* TODO: clean session hashtable */ |
48842b30 | 50 | free(lta->sessions); |
f6a9efaa | 51 | close(lta->key.sock); |
56fff090 | 52 | |
f6a9efaa DG |
53 | /* Remove from apps hash table */ |
54 | node = hashtable_lookup(ust_app_ht, | |
55 | (void *) ((unsigned long) lta->key.pid), sizeof(void *), &iter); | |
56 | if (node == NULL) { | |
57 | ERR("UST app pid %d not found in hash table", lta->key.pid); | |
58 | } else { | |
59 | ret = hashtable_del(ust_app_ht, &iter); | |
60 | if (ret) { | |
61 | ERR("UST app unable to delete app %d from hash table", | |
62 | lta->key.pid); | |
63 | } else { | |
64 | DBG2("UST app pid %d deleted", lta->key.pid); | |
56fff090 DG |
65 | } |
66 | } | |
67 | ||
f6a9efaa DG |
68 | /* Remove from key hash table */ |
69 | node = hashtable_lookup(ust_app_sock_key_map, | |
70 | (void *) ((unsigned long) lta->key.sock), sizeof(void *), &iter); | |
71 | if (node == NULL) { | |
72 | ERR("UST app key %d not found in key hash table", lta->key.sock); | |
73 | } else { | |
74 | ret = hashtable_del(ust_app_sock_key_map, &iter); | |
75 | if (ret) { | |
76 | ERR("UST app unable to delete app sock %d from key hash table", | |
77 | lta->key.sock); | |
78 | } else { | |
79 | DBG2("UST app pair sock %d key %d deleted", | |
80 | lta->key.sock, lta->key.pid); | |
81 | } | |
82 | } | |
83 | ||
84 | free(lta); | |
85 | ||
86 | rcu_read_unlock(); | |
099e26bd DG |
87 | } |
88 | ||
89 | /* | |
f6a9efaa | 90 | * URCU intermediate call to delete an UST app. |
099e26bd | 91 | */ |
f6a9efaa | 92 | static void delete_ust_app_rcu(struct rcu_head *head) |
099e26bd | 93 | { |
f6a9efaa DG |
94 | struct cds_lfht_node *node = |
95 | caa_container_of(head, struct cds_lfht_node, head); | |
96 | struct ust_app *app = | |
97 | caa_container_of(node, struct ust_app, node); | |
98 | ||
99 | delete_ust_app(app); | |
099e26bd DG |
100 | } |
101 | ||
102 | /* | |
421cb601 DG |
103 | * Find an ust_app using the sock and return it. RCU read side lock must be |
104 | * held before calling this helper function. | |
099e26bd | 105 | */ |
f6a9efaa | 106 | static struct ust_app *find_app_by_sock(int sock) |
099e26bd | 107 | { |
f6a9efaa DG |
108 | struct cds_lfht_node *node; |
109 | struct ust_app_key *key; | |
110 | struct cds_lfht_iter iter; | |
f6a9efaa | 111 | |
f6a9efaa DG |
112 | node = hashtable_lookup(ust_app_sock_key_map, |
113 | (void *)((unsigned long) sock), sizeof(void *), &iter); | |
114 | if (node == NULL) { | |
115 | DBG2("UST app find by sock %d key not found", sock); | |
116 | rcu_read_unlock(); | |
117 | goto error; | |
118 | } | |
119 | ||
120 | key = caa_container_of(node, struct ust_app_key, node); | |
121 | ||
122 | node = hashtable_lookup(ust_app_ht, | |
123 | (void *)((unsigned long) key->pid), sizeof(void *), &iter); | |
124 | if (node == NULL) { | |
125 | DBG2("UST app find by sock %d not found", sock); | |
126 | rcu_read_unlock(); | |
127 | goto error; | |
128 | } | |
f6a9efaa DG |
129 | |
130 | return caa_container_of(node, struct ust_app, node); | |
131 | ||
132 | error: | |
133 | return NULL; | |
099e26bd DG |
134 | } |
135 | ||
136 | /* | |
f6a9efaa | 137 | * Return pointer to traceable apps list. |
099e26bd | 138 | */ |
f6a9efaa | 139 | struct cds_lfht *ust_app_get_ht(void) |
099e26bd | 140 | { |
f6a9efaa | 141 | return ust_app_ht; |
91d76f53 DG |
142 | } |
143 | ||
0177d773 | 144 | /* |
f6a9efaa | 145 | * Return ust app pointer or NULL if not found. |
0177d773 | 146 | */ |
f6a9efaa | 147 | struct ust_app *ust_app_find_by_pid(pid_t pid) |
0177d773 | 148 | { |
f6a9efaa DG |
149 | struct cds_lfht_node *node; |
150 | struct cds_lfht_iter iter; | |
0177d773 | 151 | |
f6a9efaa DG |
152 | rcu_read_lock(); |
153 | node = hashtable_lookup(ust_app_ht, | |
154 | (void *)((unsigned long) pid), sizeof(void *), &iter); | |
155 | if (node == NULL) { | |
156 | rcu_read_unlock(); | |
157 | DBG2("UST app no found with pid %d", pid); | |
158 | goto error; | |
0177d773 | 159 | } |
f6a9efaa | 160 | rcu_read_unlock(); |
0177d773 | 161 | |
f6a9efaa | 162 | DBG2("Found UST app by pid %d", pid); |
44d3bd01 | 163 | |
f6a9efaa DG |
164 | return caa_container_of(node, struct ust_app, node); |
165 | ||
166 | error: | |
0177d773 DG |
167 | return NULL; |
168 | } | |
169 | ||
91d76f53 | 170 | /* |
56fff090 | 171 | * Using pid and uid (of the app), allocate a new ust_app struct and |
050349bb | 172 | * add it to the global traceable app list. |
91d76f53 | 173 | * |
050349bb | 174 | * On success, return 0, else return malloc ENOMEM. |
91d76f53 | 175 | */ |
56fff090 | 176 | int ust_app_register(struct ust_register_msg *msg, int sock) |
91d76f53 | 177 | { |
56fff090 | 178 | struct ust_app *lta; |
91d76f53 | 179 | |
56fff090 | 180 | lta = malloc(sizeof(struct ust_app)); |
91d76f53 | 181 | if (lta == NULL) { |
48842b30 | 182 | PERROR("malloc"); |
91d76f53 DG |
183 | return -ENOMEM; |
184 | } | |
185 | ||
099e26bd DG |
186 | lta->uid = msg->uid; |
187 | lta->gid = msg->gid; | |
f6a9efaa | 188 | lta->key.pid = msg->pid; |
099e26bd DG |
189 | lta->ppid = msg->ppid; |
190 | lta->v_major = msg->major; | |
191 | lta->v_minor = msg->minor; | |
f6a9efaa | 192 | lta->key.sock = sock; |
099e26bd DG |
193 | strncpy(lta->name, msg->name, sizeof(lta->name)); |
194 | lta->name[16] = '\0'; | |
f6a9efaa DG |
195 | hashtable_node_init(<a->node, (void *)((unsigned long)lta->key.pid), |
196 | sizeof(void *)); | |
48842b30 DG |
197 | |
198 | /* Session hashtable */ | |
199 | lta->sessions = hashtable_new(0); | |
f6a9efaa DG |
200 | |
201 | /* Set sock key map */ | |
202 | hashtable_node_init(<a->key.node, (void *)((unsigned long)lta->key.sock), | |
203 | sizeof(void *)); | |
099e26bd | 204 | |
f6a9efaa DG |
205 | rcu_read_lock(); |
206 | hashtable_add_unique(ust_app_ht, <a->node); | |
207 | hashtable_add_unique(ust_app_sock_key_map, <a->key.node); | |
208 | rcu_read_unlock(); | |
099e26bd DG |
209 | |
210 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
f6a9efaa DG |
211 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, |
212 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
91d76f53 DG |
213 | |
214 | return 0; | |
215 | } | |
216 | ||
217 | /* | |
050349bb DG |
218 | * Unregister app by removing it from the global traceable app list and freeing |
219 | * the data struct. | |
099e26bd DG |
220 | * |
221 | * The socket is already closed at this point so no close to sock. | |
91d76f53 | 222 | */ |
56fff090 | 223 | void ust_app_unregister(int sock) |
91d76f53 | 224 | { |
56fff090 | 225 | struct ust_app *lta; |
421cb601 DG |
226 | struct cds_lfht_node *node; |
227 | struct cds_lfht_iter iter; | |
91d76f53 | 228 | |
421cb601 | 229 | rcu_read_lock(); |
099e26bd | 230 | lta = find_app_by_sock(sock); |
421cb601 DG |
231 | if (lta == NULL) { |
232 | ERR("Unregister app sock %d not found!", sock); | |
233 | goto error; | |
234 | } | |
235 | ||
236 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
237 | ||
238 | /* Get the node reference for a call_rcu */ | |
239 | node = hashtable_lookup(ust_app_ht, | |
240 | (void *)((unsigned long) lta->key.pid), sizeof(void *), &iter); | |
241 | if (node == NULL) { | |
242 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
243 | goto error; | |
91d76f53 | 244 | } |
421cb601 DG |
245 | |
246 | call_rcu(&node->head, delete_ust_app_rcu); | |
247 | ||
248 | error: | |
249 | rcu_read_unlock(); | |
250 | return; | |
91d76f53 DG |
251 | } |
252 | ||
253 | /* | |
050349bb | 254 | * Return traceable_app_count |
91d76f53 | 255 | */ |
f6a9efaa | 256 | unsigned long ust_app_list_count(void) |
91d76f53 | 257 | { |
f6a9efaa | 258 | unsigned long count; |
91d76f53 | 259 | |
f6a9efaa DG |
260 | rcu_read_lock(); |
261 | count = hashtable_get_count(ust_app_ht); | |
262 | rcu_read_unlock(); | |
91d76f53 | 263 | |
099e26bd | 264 | return count; |
91d76f53 DG |
265 | } |
266 | ||
b551a063 DG |
267 | /* |
268 | * Fill events array with all events name of all registered apps. | |
269 | */ | |
270 | int ust_app_list_events(struct lttng_event **events) | |
271 | { | |
272 | int ret, handle; | |
273 | size_t nbmem, count = 0; | |
274 | struct cds_lfht_iter iter; | |
275 | struct ust_app *app; | |
276 | struct lttng_event *tmp; | |
277 | ||
278 | nbmem = UST_APP_EVENT_LIST_SIZE; | |
279 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
280 | if (tmp == NULL) { | |
281 | PERROR("zmalloc ust app events"); | |
282 | ret = -ENOMEM; | |
283 | goto error; | |
284 | } | |
285 | ||
286 | rcu_read_lock(); | |
287 | ||
288 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
289 | handle = ustctl_tracepoint_list(app->key.sock); | |
290 | if (handle < 0) { | |
291 | ERR("UST app list events getting handle failed for app pid %d", | |
292 | app->key.pid); | |
293 | continue; | |
294 | } | |
295 | ||
296 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, | |
297 | tmp[count].name)) != -ENOENT) { | |
298 | if (count > nbmem) { | |
299 | DBG2("Reallocating event list from %zu to %zu bytes", nbmem, | |
300 | nbmem + UST_APP_EVENT_LIST_SIZE); | |
301 | nbmem += UST_APP_EVENT_LIST_SIZE; | |
302 | tmp = realloc(tmp, nbmem); | |
303 | if (tmp == NULL) { | |
304 | PERROR("realloc ust app events"); | |
305 | ret = -ENOMEM; | |
306 | goto rcu_error; | |
307 | } | |
308 | } | |
309 | ||
310 | tmp[count].type = LTTNG_UST_TRACEPOINT; | |
311 | tmp[count].pid = app->key.pid; | |
312 | count++; | |
313 | } | |
314 | } | |
315 | ||
316 | ret = count; | |
317 | *events = tmp; | |
318 | ||
319 | DBG2("UST app list events done (%zu events)", count); | |
320 | ||
321 | rcu_error: | |
322 | rcu_read_unlock(); | |
323 | error: | |
324 | return ret; | |
325 | } | |
326 | ||
91d76f53 | 327 | /* |
099e26bd | 328 | * Free and clean all traceable apps of the global list. |
91d76f53 | 329 | */ |
56fff090 | 330 | void ust_app_clean_list(void) |
91d76f53 | 331 | { |
f6a9efaa DG |
332 | int ret; |
333 | struct cds_lfht_node *node; | |
334 | struct cds_lfht_iter iter; | |
335 | ||
336 | DBG2("UST app clean hash table"); | |
337 | ||
338 | rcu_read_lock(); | |
339 | ||
340 | hashtable_get_first(ust_app_ht, &iter); | |
341 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
342 | ret = hashtable_del(ust_app_ht, &iter); | |
343 | if (!ret) { | |
344 | call_rcu(&node->head, delete_ust_app_rcu); | |
345 | } | |
346 | hashtable_get_next(ust_app_ht, &iter); | |
91d76f53 | 347 | } |
f6a9efaa DG |
348 | |
349 | rcu_read_unlock(); | |
350 | } | |
351 | ||
352 | /* | |
353 | * Init UST app hash table. | |
354 | */ | |
355 | void ust_app_ht_alloc(void) | |
356 | { | |
357 | ust_app_ht = hashtable_new(0); | |
358 | ust_app_sock_key_map = hashtable_new(0); | |
91d76f53 | 359 | } |
48842b30 DG |
360 | |
361 | /* | |
362 | * Alloc new UST app session. | |
363 | */ | |
421cb601 | 364 | static struct ust_app_session *alloc_ust_app_session(void) |
48842b30 DG |
365 | { |
366 | struct ust_app_session *ua_sess; | |
367 | ||
421cb601 | 368 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
369 | ua_sess = zmalloc(sizeof(struct ust_app_session)); |
370 | if (ua_sess == NULL) { | |
371 | PERROR("malloc"); | |
372 | goto error; | |
373 | } | |
374 | ||
48842b30 DG |
375 | ua_sess->handle = -1; |
376 | ua_sess->channels = hashtable_new_str(0); | |
48842b30 DG |
377 | |
378 | return ua_sess; | |
379 | ||
380 | error: | |
381 | return NULL; | |
382 | } | |
383 | ||
421cb601 DG |
384 | /* |
385 | * Alloc new UST app channel. | |
386 | */ | |
387 | static struct ust_app_channel *alloc_ust_app_channel(char *name) | |
48842b30 DG |
388 | { |
389 | struct ust_app_channel *ua_chan; | |
390 | ||
421cb601 | 391 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
392 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); |
393 | if (ua_chan == NULL) { | |
394 | PERROR("malloc"); | |
395 | goto error; | |
396 | } | |
397 | ||
398 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
399 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
48842b30 | 400 | ua_chan->handle = -1; |
48842b30 | 401 | ua_chan->ctx = hashtable_new(0); |
5af2f756 | 402 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); |
48842b30 DG |
403 | ua_chan->events = hashtable_new_str(0); |
404 | hashtable_node_init(&ua_chan->node, (void *) ua_chan->name, | |
405 | strlen(ua_chan->name)); | |
406 | ||
407 | DBG3("UST app channel %s allocated", ua_chan->name); | |
408 | ||
409 | return ua_chan; | |
410 | ||
411 | error: | |
412 | return NULL; | |
413 | } | |
414 | ||
421cb601 DG |
415 | /* |
416 | * Alloc new UST app event. | |
417 | */ | |
418 | static struct ust_app_event *alloc_ust_app_event(char *name) | |
48842b30 DG |
419 | { |
420 | struct ust_app_event *ua_event; | |
421 | ||
421cb601 | 422 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
423 | ua_event = zmalloc(sizeof(struct ust_app_event)); |
424 | if (ua_event == NULL) { | |
425 | PERROR("malloc"); | |
426 | goto error; | |
427 | } | |
428 | ||
429 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
430 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
431 | ua_event->ctx = hashtable_new(0); | |
432 | hashtable_node_init(&ua_event->node, (void *) ua_event->name, | |
433 | strlen(ua_event->name)); | |
434 | ||
435 | DBG3("UST app event %s allocated", ua_event->name); | |
436 | ||
437 | return ua_event; | |
438 | ||
439 | error: | |
440 | return NULL; | |
441 | } | |
442 | ||
421cb601 | 443 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
444 | struct ltt_ust_event *uevent) |
445 | { | |
446 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); | |
447 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
448 | ||
449 | /* TODO: support copy context */ | |
450 | } | |
451 | ||
421cb601 | 452 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
453 | struct ltt_ust_channel *uchan) |
454 | { | |
455 | struct cds_lfht_iter iter; | |
456 | struct cds_lfht_node *node, *ua_event_node; | |
457 | struct ltt_ust_event *uevent; | |
458 | struct ust_app_event *ua_event; | |
459 | ||
421cb601 | 460 | DBG2("Shadow copy of UST app channel %s", ua_chan->name); |
48842b30 DG |
461 | |
462 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
463 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
464 | ||
465 | /* TODO: support copy context */ | |
466 | ||
421cb601 | 467 | /* Copy all events from ltt ust channel to ust app channel */ |
48842b30 DG |
468 | hashtable_get_first(uchan->events, &iter); |
469 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
470 | uevent = caa_container_of(node, struct ltt_ust_event, node); | |
471 | ||
472 | ua_event_node = hashtable_lookup(ua_chan->events, | |
473 | (void *) uevent->attr.name, strlen(uevent->attr.name), &iter); | |
474 | if (ua_event_node == NULL) { | |
421cb601 | 475 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 476 | uevent->attr.name); |
421cb601 | 477 | ua_event = alloc_ust_app_event(uevent->attr.name); |
48842b30 | 478 | if (ua_event == NULL) { |
421cb601 | 479 | goto next; |
48842b30 | 480 | } |
421cb601 | 481 | shadow_copy_event(ua_event, uevent); |
48842b30 | 482 | hashtable_add_unique(ua_chan->events, &ua_event->node); |
48842b30 DG |
483 | } |
484 | ||
421cb601 | 485 | next: |
48842b30 DG |
486 | /* Get next UST events */ |
487 | hashtable_get_next(uchan->events, &iter); | |
488 | } | |
489 | ||
421cb601 | 490 | DBG3("Shadow copy channel done"); |
48842b30 DG |
491 | } |
492 | ||
421cb601 | 493 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
48842b30 DG |
494 | struct ltt_ust_session *usess) |
495 | { | |
496 | struct cds_lfht_node *node, *ua_chan_node; | |
497 | struct cds_lfht_iter iter; | |
498 | struct ltt_ust_channel *uchan; | |
499 | struct ust_app_channel *ua_chan; | |
500 | ||
421cb601 | 501 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 DG |
502 | |
503 | ua_sess->uid = usess->uid; | |
504 | ||
505 | /* TODO: support all UST domain */ | |
506 | ||
507 | /* Iterate over all channels in global domain. */ | |
508 | hashtable_get_first(usess->domain_global.channels, &iter); | |
509 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
510 | uchan = caa_container_of(node, struct ltt_ust_channel, node); | |
511 | ||
512 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
421cb601 | 513 | (void *)uchan->name, strlen(uchan->name), &iter); |
48842b30 | 514 | if (ua_chan_node == NULL) { |
421cb601 | 515 | DBG2("Channel %s not found on shadow session copy, creating it", |
48842b30 | 516 | uchan->name); |
421cb601 | 517 | ua_chan = alloc_ust_app_channel(uchan->name); |
48842b30 DG |
518 | if (ua_chan == NULL) { |
519 | /* malloc failed... continuing */ | |
421cb601 | 520 | goto next; |
48842b30 | 521 | } |
421cb601 DG |
522 | |
523 | shadow_copy_channel(ua_chan, uchan); | |
48842b30 | 524 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); |
48842b30 DG |
525 | } |
526 | ||
421cb601 | 527 | next: |
48842b30 DG |
528 | /* Next item in hash table */ |
529 | hashtable_get_next(usess->domain_global.channels, &iter); | |
530 | } | |
531 | } | |
532 | ||
421cb601 DG |
533 | /* |
534 | * Return ust app session from the app session hashtable using the UST session | |
535 | * uid. | |
536 | */ | |
48842b30 DG |
537 | static struct ust_app_session *lookup_session_by_app( |
538 | struct ltt_ust_session *usess, struct ust_app *app) | |
539 | { | |
540 | struct cds_lfht_iter iter; | |
541 | struct cds_lfht_node *node; | |
542 | ||
543 | /* Get right UST app session from app */ | |
544 | node = hashtable_lookup(app->sessions, | |
421cb601 | 545 | (void *) ((unsigned long) usess->uid), sizeof(void *), &iter); |
48842b30 DG |
546 | if (node == NULL) { |
547 | goto error; | |
548 | } | |
549 | ||
550 | return caa_container_of(node, struct ust_app_session, node); | |
551 | ||
552 | error: | |
553 | return NULL; | |
554 | } | |
555 | ||
421cb601 DG |
556 | /* |
557 | * Create a UST session onto the tracer of app and add it the session | |
558 | * hashtable. | |
559 | * | |
560 | * Return ust app session or NULL on error. | |
561 | */ | |
562 | static struct ust_app_session *create_ust_app_session( | |
563 | struct ltt_ust_session *usess, struct ust_app *app) | |
564 | { | |
565 | int ret; | |
566 | struct ust_app_session *ua_sess; | |
567 | ||
568 | ua_sess = lookup_session_by_app(usess, app); | |
569 | if (ua_sess == NULL) { | |
570 | DBG2("UST app pid: %d session uid %d not found, creating it", | |
571 | app->key.pid, usess->uid); | |
572 | ua_sess = alloc_ust_app_session(); | |
573 | if (ua_sess == NULL) { | |
574 | /* Only malloc can failed so something is really wrong */ | |
575 | goto error; | |
576 | } | |
577 | shadow_copy_session(ua_sess, usess); | |
578 | } | |
579 | ||
580 | if (ua_sess->handle == -1) { | |
581 | ret = ustctl_create_session(app->key.sock); | |
582 | if (ret < 0) { | |
583 | ERR("Error creating session for app pid %d, sock %d", | |
584 | app->key.pid, app->key.sock); | |
585 | /* TODO: free() ua_sess */ | |
586 | goto error; | |
587 | } | |
588 | ||
589 | DBG2("UST app ustctl create session handle %d", ret); | |
590 | ua_sess->handle = ret; | |
591 | ||
592 | /* Add ust app session to app's HT */ | |
593 | hashtable_node_init(&ua_sess->node, | |
594 | (void *)((unsigned long) ua_sess->uid), sizeof(void *)); | |
595 | hashtable_add_unique(app->sessions, &ua_sess->node); | |
596 | ||
597 | DBG2("UST app session created successfully with handle %d", ret); | |
598 | } | |
599 | ||
600 | return ua_sess; | |
601 | ||
602 | error: | |
603 | return NULL; | |
604 | } | |
605 | ||
606 | static struct ust_app_channel *create_ust_app_channel( | |
607 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
608 | struct ust_app *app) | |
609 | { | |
610 | int ret = 0; | |
611 | struct cds_lfht_iter iter; | |
612 | struct cds_lfht_node *ua_chan_node; | |
613 | struct ust_app_channel *ua_chan; | |
614 | ||
615 | /* Lookup channel in the ust app session */ | |
616 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
617 | (void *)uchan->name, strlen(uchan->name), &iter); | |
618 | if (ua_chan_node == NULL) { | |
619 | DBG2("Unable to find channel %s in ust session uid %u", | |
620 | uchan->name, ua_sess->uid); | |
621 | ua_chan = alloc_ust_app_channel(uchan->name); | |
622 | if (ua_chan == NULL) { | |
623 | goto error; | |
624 | } | |
625 | shadow_copy_channel(ua_chan, uchan); | |
626 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
627 | } else { | |
628 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
629 | } | |
630 | ||
631 | /* TODO: remove cast and use lttng-ust-abi.h */ | |
632 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
633 | (struct lttng_ust_channel_attr *)&uchan->attr, &ua_chan->obj); | |
634 | if (ret < 0) { | |
635 | DBG("Error creating channel %s for app (pid: %d, sock: %d) " | |
636 | "and session handle %d with ret %d", | |
637 | ua_chan->name, app->key.pid, app->key.sock, | |
638 | ua_sess->handle, ret); | |
639 | goto error; | |
640 | } | |
641 | ||
642 | ua_chan->handle = ua_chan->obj->handle; | |
643 | ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; | |
644 | ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; | |
645 | ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; | |
646 | ||
647 | DBG2("Channel %s UST create successfully for pid:%d and sock:%d", | |
648 | ua_chan->name, app->key.pid, app->key.sock); | |
649 | ||
650 | return ua_chan; | |
651 | ||
652 | error: | |
653 | return NULL; | |
654 | } | |
655 | ||
656 | static struct ust_app_event *create_ust_app_event( | |
657 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan, | |
658 | struct ltt_ust_event *uevent, struct ust_app *app) | |
659 | { | |
660 | int ret; | |
661 | struct cds_lfht_iter iter; | |
662 | struct cds_lfht_node *ua_event_node; | |
663 | struct ust_app_event *ua_event; | |
664 | ||
665 | /* Get event node */ | |
666 | ua_event_node = hashtable_lookup(ua_chan->events, | |
667 | (void *)uevent->attr.name, strlen(uevent->attr.name), &iter); | |
668 | if (ua_event_node == NULL) { | |
669 | DBG2("UST app event %s not found, creating it", uevent->attr.name); | |
670 | /* Does not exist so create one */ | |
671 | ua_event = alloc_ust_app_event(uevent->attr.name); | |
672 | if (ua_event == NULL) { | |
673 | /* Only malloc can failed so something is really wrong */ | |
674 | goto error; | |
675 | } | |
676 | shadow_copy_event(ua_event, uevent); | |
677 | ||
678 | hashtable_add_unique(ua_chan->events, &ua_event->node); | |
679 | } else { | |
680 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
681 | } | |
682 | ||
683 | /* Create UST event on tracer */ | |
684 | ret = ustctl_create_event(app->key.sock, &uevent->attr, ua_chan->obj, | |
685 | &ua_event->obj); | |
686 | if (ret < 0) { | |
687 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
688 | uevent->attr.name, app->key.pid, ret); | |
689 | /* TODO: free() ua_event */ | |
690 | goto error; | |
691 | } | |
692 | ua_event->handle = ua_event->obj->handle; | |
693 | ua_event->enabled = 1; | |
694 | ||
695 | ||
696 | DBG2("Event %s UST create successfully for pid:%d", uevent->attr.name, | |
697 | app->key.pid); | |
698 | ||
699 | return ua_event; | |
700 | ||
701 | error: | |
702 | return NULL; | |
703 | } | |
704 | ||
705 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
706 | char *pathname, struct ust_app *app) | |
707 | { | |
708 | int ret = 0; | |
709 | struct lttng_ust_channel_attr uattr; | |
710 | ||
711 | if (ua_sess->metadata == NULL) { | |
712 | /* Allocate UST metadata */ | |
713 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
714 | if (ua_sess->metadata == NULL) { | |
715 | ERR("UST app session %d creating metadata failed", | |
716 | ua_sess->handle); | |
717 | goto error; | |
718 | } | |
719 | ||
720 | uattr.overwrite = ua_sess->metadata->attr.overwrite; | |
721 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
722 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
723 | uattr.switch_timer_interval = | |
724 | ua_sess->metadata->attr.switch_timer_interval; | |
725 | uattr.read_timer_interval = | |
726 | ua_sess->metadata->attr.read_timer_interval; | |
727 | uattr.output = ua_sess->metadata->attr.output; | |
728 | ||
729 | /* UST tracer metadata creation */ | |
730 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
731 | &ua_sess->metadata->obj); | |
732 | if (ret < 0) { | |
733 | ERR("UST app open metadata failed for app pid:%d", | |
734 | app->key.pid); | |
735 | goto error; | |
736 | } | |
737 | ||
738 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
739 | } | |
740 | ||
741 | /* Open UST metadata stream */ | |
742 | if (ua_sess->metadata->stream_obj == NULL) { | |
743 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, | |
744 | &ua_sess->metadata->stream_obj); | |
745 | if (ret < 0) { | |
746 | ERR("UST create metadata stream failed"); | |
747 | goto error; | |
748 | } | |
749 | ||
750 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, "%s/%s-%d", | |
751 | pathname, app->name, app->key.pid); | |
752 | if (ret < 0) { | |
753 | PERROR("asprintf UST create stream"); | |
754 | goto error; | |
755 | } | |
756 | ||
757 | ret = mkdir(ua_sess->metadata->pathname, S_IRWXU | S_IRWXG); | |
758 | if (ret < 0) { | |
759 | PERROR("mkdir UST metadata"); | |
760 | goto error; | |
761 | } | |
762 | ||
763 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, "%s/%s-%d/metadata", | |
764 | pathname, app->name, app->key.pid); | |
765 | if (ret < 0) { | |
766 | PERROR("asprintf UST create stream"); | |
767 | goto error; | |
768 | } | |
769 | ||
770 | DBG2("UST metadata stream object created for app pid %d", | |
771 | app->key.pid); | |
772 | } | |
773 | ||
774 | return 0; | |
775 | ||
776 | error: | |
777 | return -1; | |
778 | } | |
779 | ||
780 | /* | |
781 | * Add channel to all ust app session. | |
782 | */ | |
783 | int ust_app_add_channel_all(struct ltt_ust_session *usess, | |
48842b30 DG |
784 | struct ltt_ust_channel *uchan) |
785 | { | |
786 | int ret = 0; | |
787 | struct cds_lfht_iter iter; | |
421cb601 | 788 | struct cds_lfht_node *node; |
48842b30 DG |
789 | struct ust_app *app; |
790 | struct ust_app_session *ua_sess; | |
791 | struct ust_app_channel *ua_chan; | |
792 | ||
421cb601 DG |
793 | if (usess == NULL || uchan == NULL) { |
794 | ERR("Adding UST global channel to NULL values"); | |
795 | ret = -1; | |
796 | goto error; | |
797 | } | |
798 | ||
48842b30 DG |
799 | DBG2("UST app adding channel %s to global domain for session uid %d", |
800 | uchan->name, usess->uid); | |
801 | ||
802 | rcu_read_lock(); | |
421cb601 DG |
803 | |
804 | /* For every UST applications registered */ | |
48842b30 DG |
805 | hashtable_get_first(ust_app_ht, &iter); |
806 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
807 | app = caa_container_of(node, struct ust_app, node); | |
808 | ||
421cb601 DG |
809 | /* Create session on the tracer side and add it to app session HT */ |
810 | ua_sess = create_ust_app_session(usess, app); | |
509cbaf8 | 811 | if (ua_sess == NULL) { |
48842b30 DG |
812 | goto next; |
813 | } | |
814 | ||
421cb601 DG |
815 | /* Create channel onto application */ |
816 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
817 | if (ua_chan == NULL) { | |
48842b30 DG |
818 | goto next; |
819 | } | |
820 | ||
48842b30 DG |
821 | next: |
822 | /* Next applications */ | |
823 | hashtable_get_next(ust_app_ht, &iter); | |
824 | } | |
825 | rcu_read_unlock(); | |
826 | ||
421cb601 | 827 | error: |
48842b30 DG |
828 | return ret; |
829 | } | |
830 | ||
421cb601 | 831 | int ust_app_add_event_all(struct ltt_ust_session *usess, |
48842b30 DG |
832 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
833 | { | |
834 | int ret = 0; | |
835 | struct cds_lfht_iter iter; | |
421cb601 | 836 | struct cds_lfht_node *node, *ua_chan_node; |
48842b30 DG |
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; | |
48842b30 DG |
841 | |
842 | DBG2("UST app adding event %s to global domain for session uid %d", | |
843 | uevent->attr.name, usess->uid); | |
844 | ||
845 | rcu_read_lock(); | |
421cb601 DG |
846 | |
847 | /* For all registered applications */ | |
48842b30 DG |
848 | hashtable_get_first(ust_app_ht, &iter); |
849 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
850 | app = caa_container_of(node, struct ust_app, node); | |
851 | ||
421cb601 DG |
852 | /* Create session on the tracer side and add it to app session HT */ |
853 | ua_sess = create_ust_app_session(usess, app); | |
509cbaf8 | 854 | if (ua_sess == NULL) { |
421cb601 | 855 | goto next; |
48842b30 DG |
856 | } |
857 | ||
858 | /* Lookup channel in the ust app session */ | |
859 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
421cb601 | 860 | (void *)uchan->name, strlen(uchan->name), &iter); |
48842b30 | 861 | if (ua_chan_node == NULL) { |
421cb601 DG |
862 | ERR("Channel %s not found in session uid %d. Skipping", |
863 | uchan->name, usess->uid); | |
48842b30 DG |
864 | goto next; |
865 | } | |
48842b30 DG |
866 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
867 | ||
421cb601 DG |
868 | ua_event = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
869 | if (ua_event == NULL) { | |
870 | goto next; | |
48842b30 DG |
871 | } |
872 | ||
48842b30 DG |
873 | next: |
874 | /* Next applications */ | |
875 | hashtable_get_next(ust_app_ht, &iter); | |
876 | } | |
877 | rcu_read_unlock(); | |
878 | ||
879 | return ret; | |
880 | } | |
881 | ||
421cb601 | 882 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
883 | { |
884 | int ret = 0; | |
885 | struct cds_lfht_iter iter; | |
421cb601 | 886 | struct cds_lfht_node *node; |
48842b30 DG |
887 | struct ust_app_session *ua_sess; |
888 | struct ust_app_channel *ua_chan; | |
48842b30 | 889 | |
421cb601 | 890 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 891 | |
509cbaf8 MD |
892 | rcu_read_lock(); |
893 | ||
421cb601 DG |
894 | ua_sess = lookup_session_by_app(usess, app); |
895 | if (ua_sess == NULL) { | |
896 | /* Only malloc can failed so something is really wrong */ | |
509cbaf8 | 897 | goto error_rcu_unlock; |
421cb601 | 898 | } |
48842b30 | 899 | |
421cb601 DG |
900 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
901 | if (ret < 0) { | |
509cbaf8 | 902 | goto error_rcu_unlock; |
421cb601 | 903 | } |
48842b30 | 904 | |
421cb601 DG |
905 | /* For each channel */ |
906 | hashtable_get_first(ua_sess->channels, &iter); | |
907 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
908 | ua_chan = caa_container_of(node, struct ust_app_channel, node); | |
48842b30 | 909 | |
421cb601 DG |
910 | /* Create all streams */ |
911 | while (1) { | |
912 | struct ltt_ust_stream *ustream; | |
48842b30 | 913 | |
421cb601 DG |
914 | ustream = zmalloc(sizeof(*ustream)); |
915 | if (ustream == NULL) { | |
916 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 917 | goto error_rcu_unlock; |
421cb601 | 918 | } |
48842b30 | 919 | |
421cb601 DG |
920 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
921 | &ustream->obj); | |
48842b30 | 922 | if (ret < 0) { |
421cb601 DG |
923 | /* Got all streams */ |
924 | break; | |
48842b30 | 925 | } |
421cb601 | 926 | ustream->handle = ustream->obj->handle; |
48842b30 | 927 | |
421cb601 DG |
928 | /* Order is important */ |
929 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
930 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s-%d/%s_%u", | |
931 | usess->pathname, app->name, app->key.pid, | |
932 | ua_chan->name, ua_chan->streams.count++); | |
aba8e916 DG |
933 | if (ret < 0) { |
934 | PERROR("asprintf UST create stream"); | |
421cb601 | 935 | continue; |
aba8e916 | 936 | } |
421cb601 DG |
937 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
938 | ustream->pathname); | |
939 | } | |
aba8e916 | 940 | |
421cb601 DG |
941 | /* Next applications */ |
942 | hashtable_get_next(ua_sess->channels, &iter); | |
943 | } | |
aba8e916 | 944 | |
421cb601 DG |
945 | /* Setup UST consumer socket and send fds to it */ |
946 | ret = ust_consumer_send_session(usess->consumer_fd, ua_sess); | |
947 | if (ret < 0) { | |
509cbaf8 | 948 | goto error_rcu_unlock; |
421cb601 | 949 | } |
48842b30 | 950 | |
421cb601 DG |
951 | /* This start the UST tracing */ |
952 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
953 | if (ret < 0) { | |
954 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 955 | goto error_rcu_unlock; |
421cb601 | 956 | } |
509cbaf8 | 957 | rcu_read_unlock(); |
48842b30 | 958 | |
421cb601 DG |
959 | /* Quiescent wait after starting trace */ |
960 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 961 | |
421cb601 | 962 | return 0; |
48842b30 | 963 | |
509cbaf8 MD |
964 | error_rcu_unlock: |
965 | rcu_read_unlock(); | |
421cb601 DG |
966 | return -1; |
967 | } | |
48842b30 | 968 | |
421cb601 DG |
969 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
970 | { | |
971 | int ret = 0; | |
972 | struct cds_lfht_iter iter; | |
973 | struct cds_lfht_node *node; | |
974 | struct ust_app *app; | |
48842b30 | 975 | |
421cb601 DG |
976 | DBG("Starting all UST traces"); |
977 | ||
978 | rcu_read_lock(); | |
979 | hashtable_get_first(ust_app_ht, &iter); | |
980 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
981 | app = caa_container_of(node, struct ust_app, node); | |
982 | ||
983 | ret = ust_app_start_trace(usess, app); | |
48842b30 | 984 | if (ret < 0) { |
48842b30 DG |
985 | goto next; |
986 | } | |
987 | ||
48842b30 DG |
988 | next: |
989 | /* Next applications */ | |
990 | hashtable_get_next(ust_app_ht, &iter); | |
991 | } | |
992 | rcu_read_unlock(); | |
993 | ||
994 | return 0; | |
995 | } | |
487cf67c DG |
996 | |
997 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) | |
998 | { | |
999 | int ret = 0; | |
487cf67c | 1000 | struct cds_lfht_iter iter; |
421cb601 | 1001 | struct cds_lfht_node *node; |
487cf67c DG |
1002 | struct ust_app *app; |
1003 | struct ust_app_session *ua_sess; | |
1004 | struct ust_app_channel *ua_chan; | |
1005 | struct ust_app_event *ua_event; | |
487cf67c | 1006 | struct ltt_ust_channel *uchan; |
421cb601 | 1007 | struct ltt_ust_event *uevent; |
487cf67c | 1008 | |
1f3580c7 DG |
1009 | rcu_read_lock(); |
1010 | ||
1011 | if (usess == NULL) { | |
1012 | DBG2("No UST session on global update. Returning"); | |
1013 | goto error; | |
1014 | } | |
1015 | ||
487cf67c DG |
1016 | DBG2("UST app global update for app sock %d for session uid %d", sock, |
1017 | usess->uid); | |
1018 | ||
487cf67c DG |
1019 | app = find_app_by_sock(sock); |
1020 | if (app == NULL) { | |
1021 | ERR("Failed to update app sock %d", sock); | |
1022 | goto error; | |
1023 | } | |
1024 | ||
421cb601 | 1025 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 1026 | if (ua_sess == NULL) { |
487cf67c DG |
1027 | goto error; |
1028 | } | |
1029 | ||
487cf67c DG |
1030 | hashtable_get_first(usess->domain_global.channels, &iter); |
1031 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
1032 | uchan = caa_container_of(node, struct ltt_ust_channel, node); | |
1033 | ||
421cb601 DG |
1034 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); |
1035 | if (ua_chan == NULL) { | |
487cf67c DG |
1036 | goto next_chan; |
1037 | } | |
1038 | ||
421cb601 | 1039 | hashtable_get_first(uchan->events, &iter); |
487cf67c | 1040 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { |
421cb601 | 1041 | uevent = caa_container_of(node, struct ltt_ust_event, node); |
487cf67c | 1042 | |
421cb601 DG |
1043 | ua_event = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1044 | if (ua_event == NULL) { | |
487cf67c DG |
1045 | goto next_event; |
1046 | } | |
1047 | ||
487cf67c | 1048 | next_event: |
421cb601 | 1049 | hashtable_get_next(uchan->events, &iter); |
36dc12cc DG |
1050 | } |
1051 | ||
487cf67c | 1052 | next_chan: |
421cb601 DG |
1053 | /* Next item in hash table */ |
1054 | hashtable_get_next(usess->domain_global.channels, &iter); | |
487cf67c DG |
1055 | } |
1056 | ||
36dc12cc | 1057 | if (usess->start_trace) { |
421cb601 | 1058 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 1059 | if (ret < 0) { |
36dc12cc DG |
1060 | goto error; |
1061 | } | |
1062 | ||
36dc12cc DG |
1063 | DBG2("UST trace started for app pid %d", app->key.pid); |
1064 | } | |
1065 | ||
487cf67c DG |
1066 | error: |
1067 | rcu_read_unlock(); | |
1068 | return; | |
1069 | } |