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); | |
f6a9efaa DG |
116 | goto error; |
117 | } | |
118 | ||
119 | key = caa_container_of(node, struct ust_app_key, node); | |
120 | ||
121 | node = hashtable_lookup(ust_app_ht, | |
122 | (void *)((unsigned long) key->pid), sizeof(void *), &iter); | |
123 | if (node == NULL) { | |
124 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
125 | goto error; |
126 | } | |
f6a9efaa DG |
127 | |
128 | return caa_container_of(node, struct ust_app, node); | |
129 | ||
130 | error: | |
131 | return NULL; | |
099e26bd DG |
132 | } |
133 | ||
134 | /* | |
f6a9efaa | 135 | * Return pointer to traceable apps list. |
099e26bd | 136 | */ |
f6a9efaa | 137 | struct cds_lfht *ust_app_get_ht(void) |
099e26bd | 138 | { |
f6a9efaa | 139 | return ust_app_ht; |
91d76f53 DG |
140 | } |
141 | ||
0177d773 | 142 | /* |
f6a9efaa | 143 | * Return ust app pointer or NULL if not found. |
0177d773 | 144 | */ |
f6a9efaa | 145 | struct ust_app *ust_app_find_by_pid(pid_t pid) |
0177d773 | 146 | { |
f6a9efaa DG |
147 | struct cds_lfht_node *node; |
148 | struct cds_lfht_iter iter; | |
0177d773 | 149 | |
f6a9efaa DG |
150 | rcu_read_lock(); |
151 | node = hashtable_lookup(ust_app_ht, | |
152 | (void *)((unsigned long) pid), sizeof(void *), &iter); | |
153 | if (node == NULL) { | |
154 | rcu_read_unlock(); | |
155 | DBG2("UST app no found with pid %d", pid); | |
156 | goto error; | |
0177d773 | 157 | } |
f6a9efaa | 158 | rcu_read_unlock(); |
0177d773 | 159 | |
f6a9efaa | 160 | DBG2("Found UST app by pid %d", pid); |
44d3bd01 | 161 | |
f6a9efaa DG |
162 | return caa_container_of(node, struct ust_app, node); |
163 | ||
164 | error: | |
0177d773 DG |
165 | return NULL; |
166 | } | |
167 | ||
91d76f53 | 168 | /* |
56fff090 | 169 | * Using pid and uid (of the app), allocate a new ust_app struct and |
050349bb | 170 | * add it to the global traceable app list. |
91d76f53 | 171 | * |
050349bb | 172 | * On success, return 0, else return malloc ENOMEM. |
91d76f53 | 173 | */ |
56fff090 | 174 | int ust_app_register(struct ust_register_msg *msg, int sock) |
91d76f53 | 175 | { |
56fff090 | 176 | struct ust_app *lta; |
91d76f53 | 177 | |
56fff090 | 178 | lta = malloc(sizeof(struct ust_app)); |
91d76f53 | 179 | if (lta == NULL) { |
48842b30 | 180 | PERROR("malloc"); |
91d76f53 DG |
181 | return -ENOMEM; |
182 | } | |
183 | ||
099e26bd DG |
184 | lta->uid = msg->uid; |
185 | lta->gid = msg->gid; | |
f6a9efaa | 186 | lta->key.pid = msg->pid; |
099e26bd DG |
187 | lta->ppid = msg->ppid; |
188 | lta->v_major = msg->major; | |
189 | lta->v_minor = msg->minor; | |
f6a9efaa | 190 | lta->key.sock = sock; |
099e26bd DG |
191 | strncpy(lta->name, msg->name, sizeof(lta->name)); |
192 | lta->name[16] = '\0'; | |
f6a9efaa DG |
193 | hashtable_node_init(<a->node, (void *)((unsigned long)lta->key.pid), |
194 | sizeof(void *)); | |
48842b30 DG |
195 | |
196 | /* Session hashtable */ | |
197 | lta->sessions = hashtable_new(0); | |
f6a9efaa DG |
198 | |
199 | /* Set sock key map */ | |
200 | hashtable_node_init(<a->key.node, (void *)((unsigned long)lta->key.sock), | |
201 | sizeof(void *)); | |
099e26bd | 202 | |
f6a9efaa DG |
203 | rcu_read_lock(); |
204 | hashtable_add_unique(ust_app_ht, <a->node); | |
205 | hashtable_add_unique(ust_app_sock_key_map, <a->key.node); | |
206 | rcu_read_unlock(); | |
099e26bd DG |
207 | |
208 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
f6a9efaa DG |
209 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, |
210 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
91d76f53 DG |
211 | |
212 | return 0; | |
213 | } | |
214 | ||
215 | /* | |
050349bb DG |
216 | * Unregister app by removing it from the global traceable app list and freeing |
217 | * the data struct. | |
099e26bd DG |
218 | * |
219 | * The socket is already closed at this point so no close to sock. | |
91d76f53 | 220 | */ |
56fff090 | 221 | void ust_app_unregister(int sock) |
91d76f53 | 222 | { |
56fff090 | 223 | struct ust_app *lta; |
421cb601 DG |
224 | struct cds_lfht_node *node; |
225 | struct cds_lfht_iter iter; | |
91d76f53 | 226 | |
421cb601 | 227 | rcu_read_lock(); |
099e26bd | 228 | lta = find_app_by_sock(sock); |
421cb601 DG |
229 | if (lta == NULL) { |
230 | ERR("Unregister app sock %d not found!", sock); | |
231 | goto error; | |
232 | } | |
233 | ||
234 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
235 | ||
236 | /* Get the node reference for a call_rcu */ | |
237 | node = hashtable_lookup(ust_app_ht, | |
238 | (void *)((unsigned long) lta->key.pid), sizeof(void *), &iter); | |
239 | if (node == NULL) { | |
240 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
241 | goto error; | |
91d76f53 | 242 | } |
421cb601 DG |
243 | |
244 | call_rcu(&node->head, delete_ust_app_rcu); | |
245 | ||
246 | error: | |
247 | rcu_read_unlock(); | |
248 | return; | |
91d76f53 DG |
249 | } |
250 | ||
251 | /* | |
050349bb | 252 | * Return traceable_app_count |
91d76f53 | 253 | */ |
f6a9efaa | 254 | unsigned long ust_app_list_count(void) |
91d76f53 | 255 | { |
f6a9efaa | 256 | unsigned long count; |
91d76f53 | 257 | |
f6a9efaa DG |
258 | rcu_read_lock(); |
259 | count = hashtable_get_count(ust_app_ht); | |
260 | rcu_read_unlock(); | |
91d76f53 | 261 | |
099e26bd | 262 | return count; |
91d76f53 DG |
263 | } |
264 | ||
b551a063 DG |
265 | /* |
266 | * Fill events array with all events name of all registered apps. | |
267 | */ | |
268 | int ust_app_list_events(struct lttng_event **events) | |
269 | { | |
270 | int ret, handle; | |
271 | size_t nbmem, count = 0; | |
272 | struct cds_lfht_iter iter; | |
273 | struct ust_app *app; | |
274 | struct lttng_event *tmp; | |
275 | ||
276 | nbmem = UST_APP_EVENT_LIST_SIZE; | |
277 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
278 | if (tmp == NULL) { | |
279 | PERROR("zmalloc ust app events"); | |
280 | ret = -ENOMEM; | |
281 | goto error; | |
282 | } | |
283 | ||
284 | rcu_read_lock(); | |
285 | ||
286 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
287 | handle = ustctl_tracepoint_list(app->key.sock); | |
288 | if (handle < 0) { | |
289 | ERR("UST app list events getting handle failed for app pid %d", | |
290 | app->key.pid); | |
291 | continue; | |
292 | } | |
293 | ||
294 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, | |
295 | tmp[count].name)) != -ENOENT) { | |
296 | if (count > nbmem) { | |
297 | DBG2("Reallocating event list from %zu to %zu bytes", nbmem, | |
298 | nbmem + UST_APP_EVENT_LIST_SIZE); | |
299 | nbmem += UST_APP_EVENT_LIST_SIZE; | |
300 | tmp = realloc(tmp, nbmem); | |
301 | if (tmp == NULL) { | |
302 | PERROR("realloc ust app events"); | |
303 | ret = -ENOMEM; | |
304 | goto rcu_error; | |
305 | } | |
306 | } | |
307 | ||
308 | tmp[count].type = LTTNG_UST_TRACEPOINT; | |
309 | tmp[count].pid = app->key.pid; | |
310 | count++; | |
311 | } | |
312 | } | |
313 | ||
314 | ret = count; | |
315 | *events = tmp; | |
316 | ||
317 | DBG2("UST app list events done (%zu events)", count); | |
318 | ||
319 | rcu_error: | |
320 | rcu_read_unlock(); | |
321 | error: | |
322 | return ret; | |
323 | } | |
324 | ||
91d76f53 | 325 | /* |
099e26bd | 326 | * Free and clean all traceable apps of the global list. |
91d76f53 | 327 | */ |
56fff090 | 328 | void ust_app_clean_list(void) |
91d76f53 | 329 | { |
f6a9efaa DG |
330 | int ret; |
331 | struct cds_lfht_node *node; | |
332 | struct cds_lfht_iter iter; | |
333 | ||
334 | DBG2("UST app clean hash table"); | |
335 | ||
336 | rcu_read_lock(); | |
337 | ||
338 | hashtable_get_first(ust_app_ht, &iter); | |
339 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
340 | ret = hashtable_del(ust_app_ht, &iter); | |
341 | if (!ret) { | |
342 | call_rcu(&node->head, delete_ust_app_rcu); | |
343 | } | |
344 | hashtable_get_next(ust_app_ht, &iter); | |
91d76f53 | 345 | } |
f6a9efaa DG |
346 | |
347 | rcu_read_unlock(); | |
348 | } | |
349 | ||
350 | /* | |
351 | * Init UST app hash table. | |
352 | */ | |
353 | void ust_app_ht_alloc(void) | |
354 | { | |
355 | ust_app_ht = hashtable_new(0); | |
356 | ust_app_sock_key_map = hashtable_new(0); | |
91d76f53 | 357 | } |
48842b30 DG |
358 | |
359 | /* | |
360 | * Alloc new UST app session. | |
361 | */ | |
421cb601 | 362 | static struct ust_app_session *alloc_ust_app_session(void) |
48842b30 DG |
363 | { |
364 | struct ust_app_session *ua_sess; | |
365 | ||
421cb601 | 366 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
367 | ua_sess = zmalloc(sizeof(struct ust_app_session)); |
368 | if (ua_sess == NULL) { | |
369 | PERROR("malloc"); | |
370 | goto error; | |
371 | } | |
372 | ||
48842b30 DG |
373 | ua_sess->handle = -1; |
374 | ua_sess->channels = hashtable_new_str(0); | |
48842b30 DG |
375 | |
376 | return ua_sess; | |
377 | ||
378 | error: | |
379 | return NULL; | |
380 | } | |
381 | ||
421cb601 DG |
382 | /* |
383 | * Alloc new UST app channel. | |
384 | */ | |
385 | static struct ust_app_channel *alloc_ust_app_channel(char *name) | |
48842b30 DG |
386 | { |
387 | struct ust_app_channel *ua_chan; | |
388 | ||
421cb601 | 389 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
390 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); |
391 | if (ua_chan == NULL) { | |
392 | PERROR("malloc"); | |
393 | goto error; | |
394 | } | |
395 | ||
396 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
397 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
48842b30 | 398 | ua_chan->handle = -1; |
48842b30 | 399 | ua_chan->ctx = hashtable_new(0); |
5af2f756 | 400 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); |
48842b30 DG |
401 | ua_chan->events = hashtable_new_str(0); |
402 | hashtable_node_init(&ua_chan->node, (void *) ua_chan->name, | |
403 | strlen(ua_chan->name)); | |
404 | ||
405 | DBG3("UST app channel %s allocated", ua_chan->name); | |
406 | ||
407 | return ua_chan; | |
408 | ||
409 | error: | |
410 | return NULL; | |
411 | } | |
412 | ||
421cb601 DG |
413 | /* |
414 | * Alloc new UST app event. | |
415 | */ | |
416 | static struct ust_app_event *alloc_ust_app_event(char *name) | |
48842b30 DG |
417 | { |
418 | struct ust_app_event *ua_event; | |
419 | ||
421cb601 | 420 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
421 | ua_event = zmalloc(sizeof(struct ust_app_event)); |
422 | if (ua_event == NULL) { | |
423 | PERROR("malloc"); | |
424 | goto error; | |
425 | } | |
426 | ||
427 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
428 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
429 | ua_event->ctx = hashtable_new(0); | |
430 | hashtable_node_init(&ua_event->node, (void *) ua_event->name, | |
431 | strlen(ua_event->name)); | |
432 | ||
433 | DBG3("UST app event %s allocated", ua_event->name); | |
434 | ||
435 | return ua_event; | |
436 | ||
437 | error: | |
438 | return NULL; | |
439 | } | |
440 | ||
421cb601 | 441 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
442 | struct ltt_ust_event *uevent) |
443 | { | |
444 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); | |
445 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
446 | ||
447 | /* TODO: support copy context */ | |
448 | } | |
449 | ||
421cb601 | 450 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
451 | struct ltt_ust_channel *uchan) |
452 | { | |
453 | struct cds_lfht_iter iter; | |
454 | struct cds_lfht_node *node, *ua_event_node; | |
455 | struct ltt_ust_event *uevent; | |
456 | struct ust_app_event *ua_event; | |
457 | ||
421cb601 | 458 | DBG2("Shadow copy of UST app channel %s", ua_chan->name); |
48842b30 DG |
459 | |
460 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
461 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
462 | ||
463 | /* TODO: support copy context */ | |
464 | ||
421cb601 | 465 | /* Copy all events from ltt ust channel to ust app channel */ |
48842b30 DG |
466 | hashtable_get_first(uchan->events, &iter); |
467 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
468 | uevent = caa_container_of(node, struct ltt_ust_event, node); | |
469 | ||
470 | ua_event_node = hashtable_lookup(ua_chan->events, | |
471 | (void *) uevent->attr.name, strlen(uevent->attr.name), &iter); | |
472 | if (ua_event_node == NULL) { | |
421cb601 | 473 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 474 | uevent->attr.name); |
421cb601 | 475 | ua_event = alloc_ust_app_event(uevent->attr.name); |
48842b30 | 476 | if (ua_event == NULL) { |
421cb601 | 477 | goto next; |
48842b30 | 478 | } |
421cb601 | 479 | shadow_copy_event(ua_event, uevent); |
48842b30 | 480 | hashtable_add_unique(ua_chan->events, &ua_event->node); |
48842b30 DG |
481 | } |
482 | ||
421cb601 | 483 | next: |
48842b30 DG |
484 | /* Get next UST events */ |
485 | hashtable_get_next(uchan->events, &iter); | |
486 | } | |
487 | ||
421cb601 | 488 | DBG3("Shadow copy channel done"); |
48842b30 DG |
489 | } |
490 | ||
421cb601 | 491 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
48842b30 DG |
492 | struct ltt_ust_session *usess) |
493 | { | |
494 | struct cds_lfht_node *node, *ua_chan_node; | |
495 | struct cds_lfht_iter iter; | |
496 | struct ltt_ust_channel *uchan; | |
497 | struct ust_app_channel *ua_chan; | |
498 | ||
421cb601 | 499 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 DG |
500 | |
501 | ua_sess->uid = usess->uid; | |
502 | ||
503 | /* TODO: support all UST domain */ | |
504 | ||
505 | /* Iterate over all channels in global domain. */ | |
506 | hashtable_get_first(usess->domain_global.channels, &iter); | |
507 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
508 | uchan = caa_container_of(node, struct ltt_ust_channel, node); | |
509 | ||
510 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
421cb601 | 511 | (void *)uchan->name, strlen(uchan->name), &iter); |
48842b30 | 512 | if (ua_chan_node == NULL) { |
421cb601 | 513 | DBG2("Channel %s not found on shadow session copy, creating it", |
48842b30 | 514 | uchan->name); |
421cb601 | 515 | ua_chan = alloc_ust_app_channel(uchan->name); |
48842b30 DG |
516 | if (ua_chan == NULL) { |
517 | /* malloc failed... continuing */ | |
421cb601 | 518 | goto next; |
48842b30 | 519 | } |
421cb601 DG |
520 | |
521 | shadow_copy_channel(ua_chan, uchan); | |
48842b30 | 522 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); |
48842b30 DG |
523 | } |
524 | ||
421cb601 | 525 | next: |
48842b30 DG |
526 | /* Next item in hash table */ |
527 | hashtable_get_next(usess->domain_global.channels, &iter); | |
528 | } | |
529 | } | |
530 | ||
421cb601 DG |
531 | /* |
532 | * Return ust app session from the app session hashtable using the UST session | |
533 | * uid. | |
534 | */ | |
48842b30 DG |
535 | static struct ust_app_session *lookup_session_by_app( |
536 | struct ltt_ust_session *usess, struct ust_app *app) | |
537 | { | |
538 | struct cds_lfht_iter iter; | |
539 | struct cds_lfht_node *node; | |
540 | ||
541 | /* Get right UST app session from app */ | |
542 | node = hashtable_lookup(app->sessions, | |
421cb601 | 543 | (void *) ((unsigned long) usess->uid), sizeof(void *), &iter); |
48842b30 DG |
544 | if (node == NULL) { |
545 | goto error; | |
546 | } | |
547 | ||
548 | return caa_container_of(node, struct ust_app_session, node); | |
549 | ||
550 | error: | |
551 | return NULL; | |
552 | } | |
553 | ||
421cb601 DG |
554 | /* |
555 | * Create a UST session onto the tracer of app and add it the session | |
556 | * hashtable. | |
557 | * | |
558 | * Return ust app session or NULL on error. | |
559 | */ | |
560 | static struct ust_app_session *create_ust_app_session( | |
561 | struct ltt_ust_session *usess, struct ust_app *app) | |
562 | { | |
563 | int ret; | |
564 | struct ust_app_session *ua_sess; | |
565 | ||
566 | ua_sess = lookup_session_by_app(usess, app); | |
567 | if (ua_sess == NULL) { | |
568 | DBG2("UST app pid: %d session uid %d not found, creating it", | |
569 | app->key.pid, usess->uid); | |
570 | ua_sess = alloc_ust_app_session(); | |
571 | if (ua_sess == NULL) { | |
572 | /* Only malloc can failed so something is really wrong */ | |
573 | goto error; | |
574 | } | |
575 | shadow_copy_session(ua_sess, usess); | |
576 | } | |
577 | ||
578 | if (ua_sess->handle == -1) { | |
579 | ret = ustctl_create_session(app->key.sock); | |
580 | if (ret < 0) { | |
581 | ERR("Error creating session for app pid %d, sock %d", | |
582 | app->key.pid, app->key.sock); | |
583 | /* TODO: free() ua_sess */ | |
584 | goto error; | |
585 | } | |
586 | ||
587 | DBG2("UST app ustctl create session handle %d", ret); | |
588 | ua_sess->handle = ret; | |
589 | ||
590 | /* Add ust app session to app's HT */ | |
591 | hashtable_node_init(&ua_sess->node, | |
592 | (void *)((unsigned long) ua_sess->uid), sizeof(void *)); | |
593 | hashtable_add_unique(app->sessions, &ua_sess->node); | |
594 | ||
595 | DBG2("UST app session created successfully with handle %d", ret); | |
596 | } | |
597 | ||
598 | return ua_sess; | |
599 | ||
600 | error: | |
601 | return NULL; | |
602 | } | |
603 | ||
604 | static struct ust_app_channel *create_ust_app_channel( | |
605 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
606 | struct ust_app *app) | |
607 | { | |
608 | int ret = 0; | |
609 | struct cds_lfht_iter iter; | |
610 | struct cds_lfht_node *ua_chan_node; | |
611 | struct ust_app_channel *ua_chan; | |
612 | ||
613 | /* Lookup channel in the ust app session */ | |
614 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
615 | (void *)uchan->name, strlen(uchan->name), &iter); | |
616 | if (ua_chan_node == NULL) { | |
617 | DBG2("Unable to find channel %s in ust session uid %u", | |
618 | uchan->name, ua_sess->uid); | |
619 | ua_chan = alloc_ust_app_channel(uchan->name); | |
620 | if (ua_chan == NULL) { | |
621 | goto error; | |
622 | } | |
623 | shadow_copy_channel(ua_chan, uchan); | |
624 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
625 | } else { | |
626 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
627 | } | |
628 | ||
629 | /* TODO: remove cast and use lttng-ust-abi.h */ | |
630 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
631 | (struct lttng_ust_channel_attr *)&uchan->attr, &ua_chan->obj); | |
632 | if (ret < 0) { | |
633 | DBG("Error creating channel %s for app (pid: %d, sock: %d) " | |
634 | "and session handle %d with ret %d", | |
635 | ua_chan->name, app->key.pid, app->key.sock, | |
636 | ua_sess->handle, ret); | |
637 | goto error; | |
638 | } | |
639 | ||
640 | ua_chan->handle = ua_chan->obj->handle; | |
641 | ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; | |
642 | ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; | |
643 | ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; | |
644 | ||
645 | DBG2("Channel %s UST create successfully for pid:%d and sock:%d", | |
646 | ua_chan->name, app->key.pid, app->key.sock); | |
647 | ||
648 | return ua_chan; | |
649 | ||
650 | error: | |
651 | return NULL; | |
652 | } | |
653 | ||
654 | static struct ust_app_event *create_ust_app_event( | |
655 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan, | |
656 | struct ltt_ust_event *uevent, struct ust_app *app) | |
657 | { | |
658 | int ret; | |
659 | struct cds_lfht_iter iter; | |
660 | struct cds_lfht_node *ua_event_node; | |
661 | struct ust_app_event *ua_event; | |
662 | ||
663 | /* Get event node */ | |
664 | ua_event_node = hashtable_lookup(ua_chan->events, | |
665 | (void *)uevent->attr.name, strlen(uevent->attr.name), &iter); | |
666 | if (ua_event_node == NULL) { | |
667 | DBG2("UST app event %s not found, creating it", uevent->attr.name); | |
668 | /* Does not exist so create one */ | |
669 | ua_event = alloc_ust_app_event(uevent->attr.name); | |
670 | if (ua_event == NULL) { | |
671 | /* Only malloc can failed so something is really wrong */ | |
672 | goto error; | |
673 | } | |
674 | shadow_copy_event(ua_event, uevent); | |
675 | ||
676 | hashtable_add_unique(ua_chan->events, &ua_event->node); | |
677 | } else { | |
678 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
679 | } | |
680 | ||
681 | /* Create UST event on tracer */ | |
682 | ret = ustctl_create_event(app->key.sock, &uevent->attr, ua_chan->obj, | |
683 | &ua_event->obj); | |
684 | if (ret < 0) { | |
685 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
686 | uevent->attr.name, app->key.pid, ret); | |
687 | /* TODO: free() ua_event */ | |
688 | goto error; | |
689 | } | |
690 | ua_event->handle = ua_event->obj->handle; | |
691 | ua_event->enabled = 1; | |
692 | ||
693 | ||
694 | DBG2("Event %s UST create successfully for pid:%d", uevent->attr.name, | |
695 | app->key.pid); | |
696 | ||
697 | return ua_event; | |
698 | ||
699 | error: | |
700 | return NULL; | |
701 | } | |
702 | ||
703 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
704 | char *pathname, struct ust_app *app) | |
705 | { | |
706 | int ret = 0; | |
707 | struct lttng_ust_channel_attr uattr; | |
708 | ||
709 | if (ua_sess->metadata == NULL) { | |
710 | /* Allocate UST metadata */ | |
711 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
712 | if (ua_sess->metadata == NULL) { | |
713 | ERR("UST app session %d creating metadata failed", | |
714 | ua_sess->handle); | |
715 | goto error; | |
716 | } | |
717 | ||
718 | uattr.overwrite = ua_sess->metadata->attr.overwrite; | |
719 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
720 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
721 | uattr.switch_timer_interval = | |
722 | ua_sess->metadata->attr.switch_timer_interval; | |
723 | uattr.read_timer_interval = | |
724 | ua_sess->metadata->attr.read_timer_interval; | |
725 | uattr.output = ua_sess->metadata->attr.output; | |
726 | ||
727 | /* UST tracer metadata creation */ | |
728 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
729 | &ua_sess->metadata->obj); | |
730 | if (ret < 0) { | |
731 | ERR("UST app open metadata failed for app pid:%d", | |
732 | app->key.pid); | |
733 | goto error; | |
734 | } | |
735 | ||
736 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
737 | } | |
738 | ||
739 | /* Open UST metadata stream */ | |
740 | if (ua_sess->metadata->stream_obj == NULL) { | |
741 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, | |
742 | &ua_sess->metadata->stream_obj); | |
743 | if (ret < 0) { | |
744 | ERR("UST create metadata stream failed"); | |
745 | goto error; | |
746 | } | |
747 | ||
748 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, "%s/%s-%d", | |
749 | pathname, app->name, app->key.pid); | |
750 | if (ret < 0) { | |
751 | PERROR("asprintf UST create stream"); | |
752 | goto error; | |
753 | } | |
754 | ||
755 | ret = mkdir(ua_sess->metadata->pathname, S_IRWXU | S_IRWXG); | |
756 | if (ret < 0) { | |
757 | PERROR("mkdir UST metadata"); | |
758 | goto error; | |
759 | } | |
760 | ||
761 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, "%s/%s-%d/metadata", | |
762 | pathname, app->name, app->key.pid); | |
763 | if (ret < 0) { | |
764 | PERROR("asprintf UST create stream"); | |
765 | goto error; | |
766 | } | |
767 | ||
768 | DBG2("UST metadata stream object created for app pid %d", | |
769 | app->key.pid); | |
770 | } | |
771 | ||
772 | return 0; | |
773 | ||
774 | error: | |
775 | return -1; | |
776 | } | |
777 | ||
778 | /* | |
779 | * Add channel to all ust app session. | |
780 | */ | |
781 | int ust_app_add_channel_all(struct ltt_ust_session *usess, | |
48842b30 DG |
782 | struct ltt_ust_channel *uchan) |
783 | { | |
784 | int ret = 0; | |
785 | struct cds_lfht_iter iter; | |
421cb601 | 786 | struct cds_lfht_node *node; |
48842b30 DG |
787 | struct ust_app *app; |
788 | struct ust_app_session *ua_sess; | |
789 | struct ust_app_channel *ua_chan; | |
790 | ||
421cb601 DG |
791 | if (usess == NULL || uchan == NULL) { |
792 | ERR("Adding UST global channel to NULL values"); | |
793 | ret = -1; | |
794 | goto error; | |
795 | } | |
796 | ||
48842b30 DG |
797 | DBG2("UST app adding channel %s to global domain for session uid %d", |
798 | uchan->name, usess->uid); | |
799 | ||
800 | rcu_read_lock(); | |
421cb601 DG |
801 | |
802 | /* For every UST applications registered */ | |
48842b30 DG |
803 | hashtable_get_first(ust_app_ht, &iter); |
804 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
805 | app = caa_container_of(node, struct ust_app, node); | |
806 | ||
421cb601 DG |
807 | /* Create session on the tracer side and add it to app session HT */ |
808 | ua_sess = create_ust_app_session(usess, app); | |
509cbaf8 | 809 | if (ua_sess == NULL) { |
48842b30 DG |
810 | goto next; |
811 | } | |
812 | ||
421cb601 DG |
813 | /* Create channel onto application */ |
814 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
815 | if (ua_chan == NULL) { | |
48842b30 DG |
816 | goto next; |
817 | } | |
818 | ||
48842b30 DG |
819 | next: |
820 | /* Next applications */ | |
821 | hashtable_get_next(ust_app_ht, &iter); | |
822 | } | |
823 | rcu_read_unlock(); | |
824 | ||
421cb601 | 825 | error: |
48842b30 DG |
826 | return ret; |
827 | } | |
828 | ||
421cb601 | 829 | int ust_app_add_event_all(struct ltt_ust_session *usess, |
48842b30 DG |
830 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
831 | { | |
832 | int ret = 0; | |
833 | struct cds_lfht_iter iter; | |
421cb601 | 834 | struct cds_lfht_node *node, *ua_chan_node; |
48842b30 DG |
835 | struct ust_app *app; |
836 | struct ust_app_session *ua_sess; | |
837 | struct ust_app_channel *ua_chan; | |
838 | struct ust_app_event *ua_event; | |
48842b30 DG |
839 | |
840 | DBG2("UST app adding event %s to global domain for session uid %d", | |
841 | uevent->attr.name, usess->uid); | |
842 | ||
843 | rcu_read_lock(); | |
421cb601 DG |
844 | |
845 | /* For all registered applications */ | |
48842b30 DG |
846 | hashtable_get_first(ust_app_ht, &iter); |
847 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
848 | app = caa_container_of(node, struct ust_app, node); | |
849 | ||
421cb601 DG |
850 | /* Create session on the tracer side and add it to app session HT */ |
851 | ua_sess = create_ust_app_session(usess, app); | |
509cbaf8 | 852 | if (ua_sess == NULL) { |
421cb601 | 853 | goto next; |
48842b30 DG |
854 | } |
855 | ||
856 | /* Lookup channel in the ust app session */ | |
857 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
421cb601 | 858 | (void *)uchan->name, strlen(uchan->name), &iter); |
48842b30 | 859 | if (ua_chan_node == NULL) { |
421cb601 DG |
860 | ERR("Channel %s not found in session uid %d. Skipping", |
861 | uchan->name, usess->uid); | |
48842b30 DG |
862 | goto next; |
863 | } | |
48842b30 DG |
864 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
865 | ||
421cb601 DG |
866 | ua_event = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
867 | if (ua_event == NULL) { | |
868 | goto next; | |
48842b30 DG |
869 | } |
870 | ||
48842b30 DG |
871 | next: |
872 | /* Next applications */ | |
873 | hashtable_get_next(ust_app_ht, &iter); | |
874 | } | |
875 | rcu_read_unlock(); | |
876 | ||
877 | return ret; | |
878 | } | |
879 | ||
421cb601 | 880 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
881 | { |
882 | int ret = 0; | |
883 | struct cds_lfht_iter iter; | |
421cb601 | 884 | struct cds_lfht_node *node; |
48842b30 DG |
885 | struct ust_app_session *ua_sess; |
886 | struct ust_app_channel *ua_chan; | |
48842b30 | 887 | |
421cb601 | 888 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 889 | |
509cbaf8 MD |
890 | rcu_read_lock(); |
891 | ||
421cb601 DG |
892 | ua_sess = lookup_session_by_app(usess, app); |
893 | if (ua_sess == NULL) { | |
894 | /* Only malloc can failed so something is really wrong */ | |
509cbaf8 | 895 | goto error_rcu_unlock; |
421cb601 | 896 | } |
48842b30 | 897 | |
421cb601 DG |
898 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
899 | if (ret < 0) { | |
509cbaf8 | 900 | goto error_rcu_unlock; |
421cb601 | 901 | } |
48842b30 | 902 | |
421cb601 DG |
903 | /* For each channel */ |
904 | hashtable_get_first(ua_sess->channels, &iter); | |
905 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
906 | ua_chan = caa_container_of(node, struct ust_app_channel, node); | |
48842b30 | 907 | |
421cb601 DG |
908 | /* Create all streams */ |
909 | while (1) { | |
910 | struct ltt_ust_stream *ustream; | |
48842b30 | 911 | |
421cb601 DG |
912 | ustream = zmalloc(sizeof(*ustream)); |
913 | if (ustream == NULL) { | |
914 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 915 | goto error_rcu_unlock; |
421cb601 | 916 | } |
48842b30 | 917 | |
421cb601 DG |
918 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
919 | &ustream->obj); | |
48842b30 | 920 | if (ret < 0) { |
421cb601 DG |
921 | /* Got all streams */ |
922 | break; | |
48842b30 | 923 | } |
421cb601 | 924 | ustream->handle = ustream->obj->handle; |
48842b30 | 925 | |
421cb601 DG |
926 | /* Order is important */ |
927 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
928 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s-%d/%s_%u", | |
929 | usess->pathname, app->name, app->key.pid, | |
930 | ua_chan->name, ua_chan->streams.count++); | |
aba8e916 DG |
931 | if (ret < 0) { |
932 | PERROR("asprintf UST create stream"); | |
421cb601 | 933 | continue; |
aba8e916 | 934 | } |
421cb601 DG |
935 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
936 | ustream->pathname); | |
937 | } | |
aba8e916 | 938 | |
421cb601 DG |
939 | /* Next applications */ |
940 | hashtable_get_next(ua_sess->channels, &iter); | |
941 | } | |
aba8e916 | 942 | |
421cb601 DG |
943 | /* Setup UST consumer socket and send fds to it */ |
944 | ret = ust_consumer_send_session(usess->consumer_fd, ua_sess); | |
945 | if (ret < 0) { | |
509cbaf8 | 946 | goto error_rcu_unlock; |
421cb601 | 947 | } |
48842b30 | 948 | |
421cb601 DG |
949 | /* This start the UST tracing */ |
950 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
951 | if (ret < 0) { | |
952 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 953 | goto error_rcu_unlock; |
421cb601 | 954 | } |
509cbaf8 | 955 | rcu_read_unlock(); |
48842b30 | 956 | |
421cb601 DG |
957 | /* Quiescent wait after starting trace */ |
958 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 959 | |
421cb601 | 960 | return 0; |
48842b30 | 961 | |
509cbaf8 MD |
962 | error_rcu_unlock: |
963 | rcu_read_unlock(); | |
421cb601 DG |
964 | return -1; |
965 | } | |
48842b30 | 966 | |
421cb601 DG |
967 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
968 | { | |
969 | int ret = 0; | |
970 | struct cds_lfht_iter iter; | |
971 | struct cds_lfht_node *node; | |
972 | struct ust_app *app; | |
48842b30 | 973 | |
421cb601 DG |
974 | DBG("Starting all UST traces"); |
975 | ||
976 | rcu_read_lock(); | |
977 | hashtable_get_first(ust_app_ht, &iter); | |
978 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
979 | app = caa_container_of(node, struct ust_app, node); | |
980 | ||
981 | ret = ust_app_start_trace(usess, app); | |
48842b30 | 982 | if (ret < 0) { |
48842b30 DG |
983 | goto next; |
984 | } | |
985 | ||
48842b30 DG |
986 | next: |
987 | /* Next applications */ | |
988 | hashtable_get_next(ust_app_ht, &iter); | |
989 | } | |
990 | rcu_read_unlock(); | |
991 | ||
992 | return 0; | |
993 | } | |
487cf67c DG |
994 | |
995 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) | |
996 | { | |
997 | int ret = 0; | |
487cf67c | 998 | struct cds_lfht_iter iter; |
421cb601 | 999 | struct cds_lfht_node *node; |
487cf67c DG |
1000 | struct ust_app *app; |
1001 | struct ust_app_session *ua_sess; | |
1002 | struct ust_app_channel *ua_chan; | |
1003 | struct ust_app_event *ua_event; | |
487cf67c | 1004 | struct ltt_ust_channel *uchan; |
421cb601 | 1005 | struct ltt_ust_event *uevent; |
487cf67c | 1006 | |
1f3580c7 DG |
1007 | rcu_read_lock(); |
1008 | ||
1009 | if (usess == NULL) { | |
1010 | DBG2("No UST session on global update. Returning"); | |
1011 | goto error; | |
1012 | } | |
1013 | ||
487cf67c DG |
1014 | DBG2("UST app global update for app sock %d for session uid %d", sock, |
1015 | usess->uid); | |
1016 | ||
487cf67c DG |
1017 | app = find_app_by_sock(sock); |
1018 | if (app == NULL) { | |
1019 | ERR("Failed to update app sock %d", sock); | |
1020 | goto error; | |
1021 | } | |
1022 | ||
421cb601 | 1023 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 1024 | if (ua_sess == NULL) { |
487cf67c DG |
1025 | goto error; |
1026 | } | |
1027 | ||
487cf67c DG |
1028 | hashtable_get_first(usess->domain_global.channels, &iter); |
1029 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { | |
1030 | uchan = caa_container_of(node, struct ltt_ust_channel, node); | |
1031 | ||
421cb601 DG |
1032 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); |
1033 | if (ua_chan == NULL) { | |
487cf67c DG |
1034 | goto next_chan; |
1035 | } | |
1036 | ||
421cb601 | 1037 | hashtable_get_first(uchan->events, &iter); |
487cf67c | 1038 | while ((node = hashtable_iter_get_node(&iter)) != NULL) { |
421cb601 | 1039 | uevent = caa_container_of(node, struct ltt_ust_event, node); |
487cf67c | 1040 | |
421cb601 DG |
1041 | ua_event = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1042 | if (ua_event == NULL) { | |
487cf67c DG |
1043 | goto next_event; |
1044 | } | |
1045 | ||
487cf67c | 1046 | next_event: |
421cb601 | 1047 | hashtable_get_next(uchan->events, &iter); |
36dc12cc DG |
1048 | } |
1049 | ||
487cf67c | 1050 | next_chan: |
421cb601 DG |
1051 | /* Next item in hash table */ |
1052 | hashtable_get_next(usess->domain_global.channels, &iter); | |
487cf67c DG |
1053 | } |
1054 | ||
36dc12cc | 1055 | if (usess->start_trace) { |
421cb601 | 1056 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 1057 | if (ret < 0) { |
36dc12cc DG |
1058 | goto error; |
1059 | } | |
1060 | ||
36dc12cc DG |
1061 | DBG2("UST trace started for app pid %d", app->key.pid); |
1062 | } | |
1063 | ||
487cf67c DG |
1064 | error: |
1065 | rcu_read_unlock(); | |
1066 | return; | |
1067 | } |