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" |
48842b30 | 34 | #include "ust-consumer.h" |
d80a6244 DG |
35 | #include "ust-ctl.h" |
36 | ||
37 | /* | |
38 | * Delete ust app event safely. RCU read lock must be held before calling | |
39 | * this function. | |
40 | */ | |
41 | static void delete_ust_app_event(int sock, struct ust_app_event *ua_event) | |
42 | { | |
43 | /* TODO : remove context */ | |
44 | //struct ust_app_ctx *ltctx; | |
45 | //cds_lfht_for_each_entry(lte->ctx, &iter, ltctx, node) { | |
46 | // delete_ust_app_ctx(sock, ltctx); | |
47 | //} | |
48 | ||
49 | ustctl_release_object(sock, ua_event->obj); | |
50 | free(ua_event); | |
51 | } | |
52 | ||
53 | /* | |
54 | * Delete ust app stream safely. RCU read lock must be held before calling | |
55 | * this function. | |
56 | */ | |
57 | static void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream) | |
58 | { | |
59 | //TODO | |
60 | //stream is used for passing to consumer. | |
61 | //send_channel_streams is responsible for freeing the streams. | |
62 | //note that this will not play well with flight recorder mode: | |
63 | //we might need a criterion to discard the streams. | |
64 | } | |
65 | ||
66 | /* | |
67 | * Delete ust app channel safely. RCU read lock must be held before calling | |
68 | * this function. | |
69 | */ | |
70 | static void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan) | |
71 | { | |
72 | int ret; | |
73 | struct cds_lfht_iter iter; | |
74 | struct ust_app_event *ua_event; | |
75 | struct ltt_ust_stream *stream, *stmp; | |
76 | ||
77 | cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) { | |
78 | delete_ust_app_stream(sock, stream); | |
79 | } | |
80 | ||
81 | /* TODO : remove channel context */ | |
82 | //cds_lfht_for_each_entry(ltc->ctx, &iter, ltctx, node) { | |
83 | // hashtable_del(ltc->ctx, &iter); | |
84 | // delete_ust_app_ctx(sock, ltctx); | |
85 | //} | |
86 | //ret = hashtable_destroy(ltc->ctx); | |
87 | ||
88 | cds_lfht_for_each_entry(ua_chan->events, &iter, ua_event, node) { | |
89 | hashtable_del(ua_chan->events, &iter); | |
90 | delete_ust_app_event(sock, ua_event); | |
91 | } | |
92 | ||
93 | ret = hashtable_destroy(ua_chan->events); | |
94 | if (ret < 0) { | |
95 | ERR("UST app destroy session hashtable failed"); | |
96 | goto error; | |
97 | } | |
98 | ||
99 | error: | |
100 | return; | |
101 | } | |
102 | ||
103 | /* | |
104 | * Delete ust app session safely. RCU read lock must be held before calling | |
105 | * this function. | |
106 | */ | |
107 | static void delete_ust_app_session(int sock, | |
108 | struct ust_app_session *ua_sess) | |
109 | { | |
110 | int ret; | |
111 | struct cds_lfht_iter iter; | |
112 | struct ust_app_channel *ua_chan; | |
113 | ||
114 | if (ua_sess->metadata) { | |
115 | /* | |
116 | * We do NOT release the stream object and metadata object since they | |
117 | * are release when fds are sent to the consumer. | |
118 | */ | |
119 | } | |
120 | ||
121 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { | |
122 | hashtable_del(ua_sess->channels, &iter); | |
123 | delete_ust_app_channel(sock, ua_chan); | |
124 | } | |
125 | ||
126 | ret = hashtable_destroy(ua_sess->channels); | |
127 | if (ret < 0) { | |
128 | ERR("UST app destroy session hashtable failed"); | |
129 | goto error; | |
130 | } | |
131 | ||
132 | error: | |
133 | return; | |
134 | } | |
91d76f53 DG |
135 | |
136 | /* | |
284d8f55 DG |
137 | * Delete a traceable application structure from the global list. Never call |
138 | * this function outside of a call_rcu call. | |
91d76f53 | 139 | */ |
284d8f55 | 140 | static void delete_ust_app(struct ust_app *app) |
91d76f53 | 141 | { |
f6a9efaa DG |
142 | int ret; |
143 | struct cds_lfht_node *node; | |
144 | struct cds_lfht_iter iter; | |
284d8f55 | 145 | struct ust_app_session *ua_sess; |
6414a713 | 146 | int sock; |
44d3bd01 | 147 | |
f6a9efaa | 148 | rcu_read_lock(); |
44d3bd01 | 149 | |
f6a9efaa DG |
150 | /* Remove from key hash table */ |
151 | node = hashtable_lookup(ust_app_sock_key_map, | |
284d8f55 | 152 | (void *) ((unsigned long) app->key.sock), sizeof(void *), &iter); |
f6a9efaa | 153 | if (node == NULL) { |
284d8f55 DG |
154 | /* Not suppose to happen */ |
155 | ERR("UST app key %d not found in key hash table", app->key.sock); | |
d80a6244 | 156 | goto end; |
284d8f55 DG |
157 | } |
158 | ||
159 | ret = hashtable_del(ust_app_sock_key_map, &iter); | |
160 | if (ret) { | |
161 | ERR("UST app unable to delete app sock %d from key hash table", | |
162 | app->key.sock); | |
f6a9efaa | 163 | } else { |
284d8f55 DG |
164 | DBG2("UST app pair sock %d key %d deleted", |
165 | app->key.sock, app->key.pid); | |
f6a9efaa DG |
166 | } |
167 | ||
d80a6244 DG |
168 | /* Socket is already closed at this point */ |
169 | ||
170 | /* Delete ust app sessions info */ | |
6414a713 MD |
171 | sock = app->key.sock; |
172 | app->key.sock = -1; | |
d80a6244 | 173 | |
284d8f55 DG |
174 | cds_lfht_for_each_entry(app->sessions, &iter, ua_sess, node) { |
175 | hashtable_del(app->sessions, &iter); | |
176 | delete_ust_app_session(app->key.sock, ua_sess); | |
d80a6244 | 177 | } |
f6a9efaa | 178 | |
284d8f55 | 179 | ret = hashtable_destroy(app->sessions); |
d80a6244 DG |
180 | if (ret < 0) { |
181 | ERR("UST app destroy session hashtable failed"); | |
182 | goto end; | |
183 | } | |
184 | ||
6414a713 MD |
185 | /* |
186 | * Wait until we have removed the key from the sock hash table | |
187 | * before closing this socket, otherwise an application could | |
188 | * re-use the socket ID and race with the teardown, using the | |
189 | * same hash table entry. | |
190 | */ | |
191 | close(sock); | |
d80a6244 | 192 | |
284d8f55 DG |
193 | DBG2("UST app pid %d deleted", app->key.pid); |
194 | free(app); | |
d80a6244 | 195 | end: |
f6a9efaa | 196 | rcu_read_unlock(); |
099e26bd DG |
197 | } |
198 | ||
199 | /* | |
f6a9efaa | 200 | * URCU intermediate call to delete an UST app. |
099e26bd | 201 | */ |
f6a9efaa | 202 | static void delete_ust_app_rcu(struct rcu_head *head) |
099e26bd | 203 | { |
f6a9efaa DG |
204 | struct cds_lfht_node *node = |
205 | caa_container_of(head, struct cds_lfht_node, head); | |
206 | struct ust_app *app = | |
207 | caa_container_of(node, struct ust_app, node); | |
208 | ||
209 | delete_ust_app(app); | |
099e26bd DG |
210 | } |
211 | ||
212 | /* | |
421cb601 DG |
213 | * Find an ust_app using the sock and return it. RCU read side lock must be |
214 | * held before calling this helper function. | |
099e26bd | 215 | */ |
f6a9efaa | 216 | static struct ust_app *find_app_by_sock(int sock) |
099e26bd | 217 | { |
f6a9efaa DG |
218 | struct cds_lfht_node *node; |
219 | struct ust_app_key *key; | |
220 | struct cds_lfht_iter iter; | |
f6a9efaa | 221 | |
f6a9efaa DG |
222 | node = hashtable_lookup(ust_app_sock_key_map, |
223 | (void *)((unsigned long) sock), sizeof(void *), &iter); | |
224 | if (node == NULL) { | |
225 | DBG2("UST app find by sock %d key not found", sock); | |
f6a9efaa DG |
226 | goto error; |
227 | } | |
228 | ||
229 | key = caa_container_of(node, struct ust_app_key, node); | |
230 | ||
231 | node = hashtable_lookup(ust_app_ht, | |
232 | (void *)((unsigned long) key->pid), sizeof(void *), &iter); | |
233 | if (node == NULL) { | |
234 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
235 | goto error; |
236 | } | |
f6a9efaa DG |
237 | return caa_container_of(node, struct ust_app, node); |
238 | ||
239 | error: | |
240 | return NULL; | |
099e26bd DG |
241 | } |
242 | ||
243 | /* | |
5b4a0ec0 | 244 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 245 | */ |
5b4a0ec0 DG |
246 | static int open_ust_metadata(struct ust_app *app, |
247 | struct ust_app_session *ua_sess) | |
0177d773 | 248 | { |
5b4a0ec0 DG |
249 | int ret; |
250 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 251 | |
5b4a0ec0 DG |
252 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
253 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
254 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
255 | uattr.switch_timer_interval = | |
256 | ua_sess->metadata->attr.switch_timer_interval; | |
257 | uattr.read_timer_interval = | |
258 | ua_sess->metadata->attr.read_timer_interval; | |
259 | uattr.output = ua_sess->metadata->attr.output; | |
260 | ||
261 | /* UST tracer metadata creation */ | |
262 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
263 | &ua_sess->metadata->obj); | |
264 | if (ret < 0) { | |
265 | ERR("UST app open metadata failed for app pid:%d", | |
266 | app->key.pid); | |
f6a9efaa | 267 | goto error; |
0177d773 | 268 | } |
f6a9efaa DG |
269 | |
270 | error: | |
5b4a0ec0 | 271 | return ret; |
91d76f53 DG |
272 | } |
273 | ||
274 | /* | |
5b4a0ec0 | 275 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 276 | */ |
5b4a0ec0 DG |
277 | static int create_ust_stream(struct ust_app *app, |
278 | struct ust_app_session *ua_sess) | |
91d76f53 | 279 | { |
5b4a0ec0 | 280 | int ret; |
421cb601 | 281 | |
5b4a0ec0 DG |
282 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, |
283 | &ua_sess->metadata->stream_obj); | |
284 | if (ret < 0) { | |
285 | ERR("UST create metadata stream failed"); | |
421cb601 | 286 | goto error; |
91d76f53 | 287 | } |
421cb601 | 288 | |
421cb601 | 289 | error: |
5b4a0ec0 | 290 | return ret; |
91d76f53 DG |
291 | } |
292 | ||
b551a063 | 293 | /* |
5b4a0ec0 | 294 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 295 | */ |
5b4a0ec0 DG |
296 | static int create_ust_channel(struct ust_app *app, |
297 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 298 | { |
5b4a0ec0 | 299 | int ret; |
b551a063 | 300 | |
5b4a0ec0 DG |
301 | /* TODO: remove cast and use lttng-ust-abi.h */ |
302 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
303 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); | |
304 | if (ret < 0) { | |
305 | DBG("Error creating channel %s for app (pid: %d, sock: %d) " | |
306 | "and session handle %d with ret %d", | |
307 | ua_chan->name, app->key.pid, app->key.sock, | |
308 | ua_sess->handle, ret); | |
b551a063 DG |
309 | goto error; |
310 | } | |
311 | ||
5b4a0ec0 DG |
312 | ua_chan->handle = ua_chan->obj->handle; |
313 | ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; | |
314 | ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; | |
315 | ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; | |
b551a063 | 316 | |
5b4a0ec0 DG |
317 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
318 | ua_chan->name, app->key.pid, app->key.sock); | |
b551a063 | 319 | |
b551a063 DG |
320 | error: |
321 | return ret; | |
322 | } | |
323 | ||
91d76f53 | 324 | /* |
5b4a0ec0 | 325 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 326 | */ |
5b4a0ec0 DG |
327 | static int create_ust_event(struct ust_app *app, |
328 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan, | |
329 | struct ust_app_event *ua_event) | |
91d76f53 | 330 | { |
5b4a0ec0 | 331 | int ret = 0; |
284d8f55 | 332 | |
5b4a0ec0 DG |
333 | /* Create UST event on tracer */ |
334 | ret = ustctl_create_event(app->key.sock, &ua_event->attr, ua_chan->obj, | |
335 | &ua_event->obj); | |
336 | if (ret < 0) { | |
337 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
338 | ua_event->attr.name, app->key.pid, ret); | |
339 | goto error; | |
91d76f53 | 340 | } |
f6a9efaa | 341 | |
5b4a0ec0 DG |
342 | ua_event->handle = ua_event->obj->handle; |
343 | ua_event->enabled = 1; | |
284d8f55 | 344 | |
5b4a0ec0 DG |
345 | DBG2("UST app event %s created successfully for pid:%d", |
346 | ua_event->attr.name, app->key.pid); | |
f6a9efaa | 347 | |
5b4a0ec0 DG |
348 | error: |
349 | return ret; | |
91d76f53 | 350 | } |
48842b30 DG |
351 | |
352 | /* | |
353 | * Alloc new UST app session. | |
354 | */ | |
421cb601 | 355 | static struct ust_app_session *alloc_ust_app_session(void) |
48842b30 DG |
356 | { |
357 | struct ust_app_session *ua_sess; | |
358 | ||
421cb601 | 359 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
360 | ua_sess = zmalloc(sizeof(struct ust_app_session)); |
361 | if (ua_sess == NULL) { | |
362 | PERROR("malloc"); | |
363 | goto error; | |
364 | } | |
365 | ||
48842b30 DG |
366 | ua_sess->handle = -1; |
367 | ua_sess->channels = hashtable_new_str(0); | |
48842b30 DG |
368 | |
369 | return ua_sess; | |
370 | ||
371 | error: | |
372 | return NULL; | |
373 | } | |
374 | ||
421cb601 DG |
375 | /* |
376 | * Alloc new UST app channel. | |
377 | */ | |
284d8f55 DG |
378 | static struct ust_app_channel *alloc_ust_app_channel(char *name, |
379 | struct lttng_ust_channel *attr) | |
48842b30 DG |
380 | { |
381 | struct ust_app_channel *ua_chan; | |
382 | ||
421cb601 | 383 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
384 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); |
385 | if (ua_chan == NULL) { | |
386 | PERROR("malloc"); | |
387 | goto error; | |
388 | } | |
389 | ||
284d8f55 | 390 | /* Setup channel name */ |
48842b30 DG |
391 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); |
392 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
284d8f55 | 393 | |
48842b30 | 394 | ua_chan->handle = -1; |
48842b30 | 395 | ua_chan->ctx = hashtable_new(0); |
48842b30 DG |
396 | ua_chan->events = hashtable_new_str(0); |
397 | hashtable_node_init(&ua_chan->node, (void *) ua_chan->name, | |
398 | strlen(ua_chan->name)); | |
399 | ||
284d8f55 DG |
400 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); |
401 | ||
402 | /* Copy attributes */ | |
403 | if (attr) { | |
404 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
405 | } | |
406 | ||
48842b30 DG |
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 | */ | |
284d8f55 DG |
418 | static struct ust_app_event *alloc_ust_app_event(char *name, |
419 | struct lttng_ust_event *attr) | |
48842b30 DG |
420 | { |
421 | struct ust_app_event *ua_event; | |
422 | ||
421cb601 | 423 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
424 | ua_event = zmalloc(sizeof(struct ust_app_event)); |
425 | if (ua_event == NULL) { | |
426 | PERROR("malloc"); | |
427 | goto error; | |
428 | } | |
429 | ||
430 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
431 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
432 | ua_event->ctx = hashtable_new(0); | |
433 | hashtable_node_init(&ua_event->node, (void *) ua_event->name, | |
434 | strlen(ua_event->name)); | |
435 | ||
284d8f55 DG |
436 | /* Copy attributes */ |
437 | if (attr) { | |
438 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
439 | } | |
440 | ||
48842b30 DG |
441 | DBG3("UST app event %s allocated", ua_event->name); |
442 | ||
443 | return ua_event; | |
444 | ||
445 | error: | |
446 | return NULL; | |
447 | } | |
448 | ||
5b4a0ec0 DG |
449 | /* |
450 | * Copy data between an UST app event and a LTT event. | |
451 | */ | |
421cb601 | 452 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
453 | struct ltt_ust_event *uevent) |
454 | { | |
455 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); | |
456 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
457 | ||
5b4a0ec0 DG |
458 | /* Copy event attributes */ |
459 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
460 | ||
48842b30 DG |
461 | /* TODO: support copy context */ |
462 | } | |
463 | ||
5b4a0ec0 DG |
464 | /* |
465 | * Copy data between an UST app channel and a LTT channel. | |
466 | */ | |
421cb601 | 467 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
468 | struct ltt_ust_channel *uchan) |
469 | { | |
470 | struct cds_lfht_iter iter; | |
5b4a0ec0 | 471 | struct cds_lfht_node *ua_event_node; |
48842b30 DG |
472 | struct ltt_ust_event *uevent; |
473 | struct ust_app_event *ua_event; | |
474 | ||
421cb601 | 475 | DBG2("Shadow copy of UST app channel %s", ua_chan->name); |
48842b30 DG |
476 | |
477 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
478 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
479 | /* Copy event attributes */ |
480 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 DG |
481 | |
482 | /* TODO: support copy context */ | |
483 | ||
421cb601 | 484 | /* Copy all events from ltt ust channel to ust app channel */ |
5b4a0ec0 | 485 | cds_lfht_for_each_entry(uchan->events, &iter, uevent, node) { |
ba767faf MD |
486 | struct cds_lfht_iter uiter; |
487 | ||
48842b30 | 488 | ua_event_node = hashtable_lookup(ua_chan->events, |
ba767faf MD |
489 | (void *) uevent->attr.name, strlen(uevent->attr.name), |
490 | &uiter); | |
48842b30 | 491 | if (ua_event_node == NULL) { |
421cb601 | 492 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 493 | uevent->attr.name); |
284d8f55 | 494 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 495 | if (ua_event == NULL) { |
5b4a0ec0 | 496 | continue; |
48842b30 | 497 | } |
421cb601 | 498 | shadow_copy_event(ua_event, uevent); |
48842b30 | 499 | hashtable_add_unique(ua_chan->events, &ua_event->node); |
48842b30 | 500 | } |
48842b30 DG |
501 | } |
502 | ||
421cb601 | 503 | DBG3("Shadow copy channel done"); |
48842b30 DG |
504 | } |
505 | ||
5b4a0ec0 DG |
506 | /* |
507 | * Copy data between a UST app session and a regular LTT session. | |
508 | */ | |
421cb601 | 509 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
477d7741 MD |
510 | struct ltt_ust_session *usess, |
511 | struct ust_app *app) | |
48842b30 | 512 | { |
5b4a0ec0 | 513 | struct cds_lfht_node *ua_chan_node; |
48842b30 DG |
514 | struct cds_lfht_iter iter; |
515 | struct ltt_ust_channel *uchan; | |
516 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
517 | time_t rawtime; |
518 | struct tm *timeinfo; | |
519 | char datetime[16]; | |
520 | int ret; | |
521 | ||
522 | /* Get date and time for unique app path */ | |
523 | time(&rawtime); | |
524 | timeinfo = localtime(&rawtime); | |
525 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 526 | |
421cb601 | 527 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 DG |
528 | |
529 | ua_sess->uid = usess->uid; | |
530 | ||
477d7741 MD |
531 | ret = snprintf(ua_sess->path, PATH_MAX, |
532 | "%s/%s-%d-%s", | |
533 | usess->pathname, app->name, app->key.pid, | |
534 | datetime); | |
535 | if (ret < 0) { | |
536 | PERROR("asprintf UST shadow copy session"); | |
537 | /* TODO: We cannot return an error from here.. */ | |
538 | assert(0); | |
539 | } | |
540 | ||
48842b30 DG |
541 | /* TODO: support all UST domain */ |
542 | ||
543 | /* Iterate over all channels in global domain. */ | |
5b4a0ec0 DG |
544 | cds_lfht_for_each_entry(usess->domain_global.channels, &iter, |
545 | uchan, node) { | |
ba767faf MD |
546 | struct cds_lfht_iter uiter; |
547 | ||
48842b30 | 548 | ua_chan_node = hashtable_lookup(ua_sess->channels, |
ba767faf MD |
549 | (void *)uchan->name, strlen(uchan->name), |
550 | &uiter); | |
5b4a0ec0 DG |
551 | if (ua_chan_node != NULL) { |
552 | continue; | |
553 | } | |
421cb601 | 554 | |
5b4a0ec0 DG |
555 | DBG2("Channel %s not found on shadow session copy, creating it", |
556 | uchan->name); | |
557 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
558 | if (ua_chan == NULL) { | |
559 | /* malloc failed... continuing */ | |
560 | continue; | |
48842b30 DG |
561 | } |
562 | ||
5b4a0ec0 DG |
563 | shadow_copy_channel(ua_chan, uchan); |
564 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
48842b30 DG |
565 | } |
566 | } | |
567 | ||
421cb601 DG |
568 | /* |
569 | * Return ust app session from the app session hashtable using the UST session | |
570 | * uid. | |
571 | */ | |
48842b30 DG |
572 | static struct ust_app_session *lookup_session_by_app( |
573 | struct ltt_ust_session *usess, struct ust_app *app) | |
574 | { | |
575 | struct cds_lfht_iter iter; | |
576 | struct cds_lfht_node *node; | |
577 | ||
578 | /* Get right UST app session from app */ | |
579 | node = hashtable_lookup(app->sessions, | |
421cb601 | 580 | (void *) ((unsigned long) usess->uid), sizeof(void *), &iter); |
48842b30 DG |
581 | if (node == NULL) { |
582 | goto error; | |
583 | } | |
584 | ||
585 | return caa_container_of(node, struct ust_app_session, node); | |
586 | ||
587 | error: | |
588 | return NULL; | |
589 | } | |
590 | ||
421cb601 DG |
591 | /* |
592 | * Create a UST session onto the tracer of app and add it the session | |
593 | * hashtable. | |
594 | * | |
595 | * Return ust app session or NULL on error. | |
596 | */ | |
597 | static struct ust_app_session *create_ust_app_session( | |
598 | struct ltt_ust_session *usess, struct ust_app *app) | |
599 | { | |
600 | int ret; | |
601 | struct ust_app_session *ua_sess; | |
602 | ||
603 | ua_sess = lookup_session_by_app(usess, app); | |
604 | if (ua_sess == NULL) { | |
605 | DBG2("UST app pid: %d session uid %d not found, creating it", | |
606 | app->key.pid, usess->uid); | |
607 | ua_sess = alloc_ust_app_session(); | |
608 | if (ua_sess == NULL) { | |
609 | /* Only malloc can failed so something is really wrong */ | |
610 | goto error; | |
611 | } | |
477d7741 | 612 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
613 | } |
614 | ||
615 | if (ua_sess->handle == -1) { | |
616 | ret = ustctl_create_session(app->key.sock); | |
617 | if (ret < 0) { | |
618 | ERR("Error creating session for app pid %d, sock %d", | |
619 | app->key.pid, app->key.sock); | |
620 | /* TODO: free() ua_sess */ | |
621 | goto error; | |
622 | } | |
623 | ||
624 | DBG2("UST app ustctl create session handle %d", ret); | |
625 | ua_sess->handle = ret; | |
626 | ||
627 | /* Add ust app session to app's HT */ | |
628 | hashtable_node_init(&ua_sess->node, | |
629 | (void *)((unsigned long) ua_sess->uid), sizeof(void *)); | |
630 | hashtable_add_unique(app->sessions, &ua_sess->node); | |
631 | ||
632 | DBG2("UST app session created successfully with handle %d", ret); | |
633 | } | |
634 | ||
635 | return ua_sess; | |
636 | ||
637 | error: | |
638 | return NULL; | |
639 | } | |
640 | ||
284d8f55 | 641 | /* |
5b4a0ec0 | 642 | * Create UST app channel and create it on the tracer. |
284d8f55 | 643 | */ |
5b4a0ec0 DG |
644 | static struct ust_app_channel *create_ust_app_channel( |
645 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
646 | struct ust_app *app) | |
647 | { | |
648 | int ret = 0; | |
649 | struct cds_lfht_iter iter; | |
650 | struct cds_lfht_node *ua_chan_node; | |
651 | struct ust_app_channel *ua_chan; | |
652 | ||
653 | /* Lookup channel in the ust app session */ | |
654 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
655 | (void *)uchan->name, strlen(uchan->name), &iter); | |
656 | if (ua_chan_node == NULL) { | |
657 | DBG2("Unable to find channel %s in ust session uid %u", | |
658 | uchan->name, ua_sess->uid); | |
659 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
660 | if (ua_chan == NULL) { | |
661 | goto error; | |
662 | } | |
663 | shadow_copy_channel(ua_chan, uchan); | |
664 | ||
665 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
666 | } else { | |
667 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
668 | } | |
669 | ||
670 | ret = create_ust_channel(app, ua_sess, ua_chan); | |
671 | if (ret < 0) { | |
672 | goto error; | |
673 | } | |
674 | ||
675 | return ua_chan; | |
676 | ||
677 | error: | |
678 | return NULL; | |
679 | } | |
680 | ||
681 | /* | |
682 | * Create UST app event and create it on the tracer side. | |
683 | */ | |
684 | static struct ust_app_event *create_ust_app_event( | |
685 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan, | |
686 | struct ltt_ust_event *uevent, struct ust_app *app) | |
284d8f55 DG |
687 | { |
688 | int ret; | |
5b4a0ec0 DG |
689 | struct cds_lfht_iter iter; |
690 | struct cds_lfht_node *ua_event_node; | |
691 | struct ust_app_event *ua_event; | |
284d8f55 | 692 | |
5b4a0ec0 DG |
693 | /* Get event node */ |
694 | ua_event_node = hashtable_lookup(ua_chan->events, | |
695 | (void *)uevent->attr.name, strlen(uevent->attr.name), &iter); | |
696 | if (ua_event_node == NULL) { | |
697 | DBG2("UST app event %s not found, creating it", uevent->attr.name); | |
698 | /* Does not exist so create one */ | |
699 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
700 | if (ua_event == NULL) { | |
701 | /* Only malloc can failed so something is really wrong */ | |
702 | goto error; | |
703 | } | |
704 | shadow_copy_event(ua_event, uevent); | |
705 | ||
706 | hashtable_add_unique(ua_chan->events, &ua_event->node); | |
707 | } else { | |
708 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
709 | } | |
710 | ||
711 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); | |
284d8f55 | 712 | if (ret < 0) { |
284d8f55 DG |
713 | goto error; |
714 | } | |
715 | ||
5b4a0ec0 | 716 | return ua_event; |
284d8f55 | 717 | |
5b4a0ec0 DG |
718 | error: |
719 | return NULL; | |
720 | } | |
721 | ||
722 | /* | |
723 | * Create UST metadata and open it on the tracer side. | |
724 | */ | |
725 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
726 | char *pathname, struct ust_app *app) | |
727 | { | |
728 | int ret = 0; | |
729 | ||
730 | if (ua_sess->metadata == NULL) { | |
731 | /* Allocate UST metadata */ | |
732 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
733 | if (ua_sess->metadata == NULL) { | |
734 | ERR("UST app session %d creating metadata failed", | |
735 | ua_sess->handle); | |
736 | goto error; | |
737 | } | |
738 | ||
739 | ret = open_ust_metadata(app, ua_sess); | |
740 | if (ret < 0) { | |
741 | goto error; | |
742 | } | |
743 | ||
744 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
745 | } | |
746 | ||
747 | /* Open UST metadata stream */ | |
748 | if (ua_sess->metadata->stream_obj == NULL) { | |
749 | ret = create_ust_stream(app, ua_sess); | |
750 | if (ret < 0) { | |
751 | goto error; | |
752 | } | |
753 | ||
477d7741 | 754 | ret = mkdir(ua_sess->path, S_IRWXU | S_IRWXG); |
5b4a0ec0 DG |
755 | if (ret < 0) { |
756 | PERROR("mkdir UST metadata"); | |
757 | goto error; | |
758 | } | |
759 | ||
477d7741 MD |
760 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
761 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
762 | if (ret < 0) { |
763 | PERROR("asprintf UST create stream"); | |
764 | goto error; | |
765 | } | |
766 | ||
767 | DBG2("UST metadata stream object created for app pid %d", | |
768 | app->key.pid); | |
769 | } else { | |
770 | ERR("Attempting to create stream without metadata opened"); | |
771 | goto error; | |
772 | } | |
773 | ||
774 | return 0; | |
775 | ||
776 | error: | |
777 | return -1; | |
778 | } | |
779 | ||
780 | /* | |
781 | * Return pointer to traceable apps list. | |
782 | */ | |
783 | struct cds_lfht *ust_app_get_ht(void) | |
784 | { | |
785 | return ust_app_ht; | |
786 | } | |
787 | ||
788 | /* | |
789 | * Return ust app pointer or NULL if not found. | |
790 | */ | |
791 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
792 | { | |
793 | struct cds_lfht_node *node; | |
794 | struct cds_lfht_iter iter; | |
795 | ||
796 | rcu_read_lock(); | |
797 | node = hashtable_lookup(ust_app_ht, | |
798 | (void *)((unsigned long) pid), sizeof(void *), &iter); | |
799 | if (node == NULL) { | |
800 | DBG2("UST app no found with pid %d", pid); | |
801 | goto error; | |
802 | } | |
803 | rcu_read_unlock(); | |
804 | ||
805 | DBG2("Found UST app by pid %d", pid); | |
806 | ||
807 | return caa_container_of(node, struct ust_app, node); | |
808 | ||
809 | error: | |
810 | rcu_read_unlock(); | |
811 | return NULL; | |
812 | } | |
813 | ||
814 | /* | |
815 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
816 | * add it to the global traceable app list. | |
817 | * | |
818 | * On success, return 0, else return malloc ENOMEM. | |
819 | */ | |
820 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
821 | { | |
822 | struct ust_app *lta; | |
823 | ||
824 | lta = zmalloc(sizeof(struct ust_app)); | |
825 | if (lta == NULL) { | |
826 | PERROR("malloc"); | |
827 | return -ENOMEM; | |
828 | } | |
829 | ||
830 | lta->ppid = msg->ppid; | |
831 | lta->uid = msg->uid; | |
832 | lta->gid = msg->gid; | |
833 | lta->v_major = msg->major; | |
834 | lta->v_minor = msg->minor; | |
835 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
836 | lta->name[16] = '\0'; | |
837 | lta->sessions = hashtable_new(0); | |
838 | ||
839 | /* Set key map */ | |
840 | lta->key.pid = msg->pid; | |
841 | hashtable_node_init(<a->node, (void *)((unsigned long)lta->key.pid), | |
842 | sizeof(void *)); | |
843 | lta->key.sock = sock; | |
844 | hashtable_node_init(<a->key.node, (void *)((unsigned long)lta->key.sock), | |
845 | sizeof(void *)); | |
846 | ||
847 | rcu_read_lock(); | |
848 | hashtable_add_unique(ust_app_sock_key_map, <a->key.node); | |
849 | hashtable_add_unique(ust_app_ht, <a->node); | |
850 | rcu_read_unlock(); | |
851 | ||
852 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
853 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, | |
854 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
855 | ||
856 | return 0; | |
857 | } | |
858 | ||
859 | /* | |
860 | * Unregister app by removing it from the global traceable app list and freeing | |
861 | * the data struct. | |
862 | * | |
863 | * The socket is already closed at this point so no close to sock. | |
864 | */ | |
865 | void ust_app_unregister(int sock) | |
866 | { | |
867 | struct ust_app *lta; | |
868 | struct cds_lfht_node *node; | |
869 | struct cds_lfht_iter iter; | |
870 | ||
871 | rcu_read_lock(); | |
872 | lta = find_app_by_sock(sock); | |
873 | if (lta == NULL) { | |
874 | ERR("Unregister app sock %d not found!", sock); | |
875 | goto error; | |
876 | } | |
877 | ||
878 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
879 | ||
880 | /* Get the node reference for a call_rcu */ | |
881 | node = hashtable_lookup(ust_app_ht, | |
882 | (void *)((unsigned long) lta->key.pid), sizeof(void *), &iter); | |
883 | if (node == NULL) { | |
884 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
885 | goto error; | |
886 | } | |
284d8f55 | 887 | |
5b4a0ec0 DG |
888 | hashtable_del(ust_app_ht, &iter); |
889 | call_rcu(&node->head, delete_ust_app_rcu); | |
284d8f55 | 890 | error: |
5b4a0ec0 DG |
891 | rcu_read_unlock(); |
892 | return; | |
284d8f55 DG |
893 | } |
894 | ||
895 | /* | |
5b4a0ec0 | 896 | * Return traceable_app_count |
284d8f55 | 897 | */ |
5b4a0ec0 | 898 | unsigned long ust_app_list_count(void) |
284d8f55 | 899 | { |
5b4a0ec0 | 900 | unsigned long count; |
284d8f55 | 901 | |
5b4a0ec0 DG |
902 | rcu_read_lock(); |
903 | count = hashtable_get_count(ust_app_ht); | |
904 | rcu_read_unlock(); | |
284d8f55 | 905 | |
5b4a0ec0 | 906 | return count; |
284d8f55 DG |
907 | } |
908 | ||
5b4a0ec0 DG |
909 | /* |
910 | * Fill events array with all events name of all registered apps. | |
911 | */ | |
912 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 913 | { |
5b4a0ec0 DG |
914 | int ret, handle; |
915 | size_t nbmem, count = 0; | |
421cb601 | 916 | struct cds_lfht_iter iter; |
5b4a0ec0 DG |
917 | struct ust_app *app; |
918 | struct lttng_event *tmp; | |
421cb601 | 919 | |
5b4a0ec0 DG |
920 | nbmem = UST_APP_EVENT_LIST_SIZE; |
921 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
922 | if (tmp == NULL) { | |
923 | PERROR("zmalloc ust app events"); | |
924 | ret = -ENOMEM; | |
421cb601 DG |
925 | goto error; |
926 | } | |
927 | ||
5b4a0ec0 | 928 | rcu_read_lock(); |
421cb601 | 929 | |
5b4a0ec0 DG |
930 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
931 | handle = ustctl_tracepoint_list(app->key.sock); | |
932 | if (handle < 0) { | |
933 | ERR("UST app list events getting handle failed for app pid %d", | |
934 | app->key.pid); | |
935 | continue; | |
936 | } | |
421cb601 | 937 | |
5b4a0ec0 DG |
938 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, |
939 | tmp[count].name)) != -ENOENT) { | |
940 | if (count > nbmem) { | |
941 | DBG2("Reallocating event list from %zu to %zu bytes", nbmem, | |
942 | nbmem + UST_APP_EVENT_LIST_SIZE); | |
943 | nbmem += UST_APP_EVENT_LIST_SIZE; | |
944 | tmp = realloc(tmp, nbmem); | |
945 | if (tmp == NULL) { | |
946 | PERROR("realloc ust app events"); | |
947 | ret = -ENOMEM; | |
948 | goto rcu_error; | |
949 | } | |
950 | } | |
421cb601 | 951 | |
5b4a0ec0 DG |
952 | tmp[count].type = LTTNG_UST_TRACEPOINT; |
953 | tmp[count].pid = app->key.pid; | |
954 | tmp[count].enabled = -1; | |
955 | count++; | |
421cb601 | 956 | } |
421cb601 DG |
957 | } |
958 | ||
5b4a0ec0 DG |
959 | ret = count; |
960 | *events = tmp; | |
421cb601 | 961 | |
5b4a0ec0 | 962 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 963 | |
5b4a0ec0 DG |
964 | rcu_error: |
965 | rcu_read_unlock(); | |
421cb601 | 966 | error: |
5b4a0ec0 | 967 | return ret; |
421cb601 DG |
968 | } |
969 | ||
5b4a0ec0 DG |
970 | /* |
971 | * Free and clean all traceable apps of the global list. | |
972 | */ | |
973 | void ust_app_clean_list(void) | |
421cb601 | 974 | { |
5b4a0ec0 DG |
975 | int ret; |
976 | struct cds_lfht_node *node; | |
977 | struct cds_lfht_iter iter; | |
978 | struct ust_app *app; | |
421cb601 | 979 | |
5b4a0ec0 | 980 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 981 | |
5b4a0ec0 | 982 | rcu_read_lock(); |
421cb601 | 983 | |
5b4a0ec0 DG |
984 | cds_lfht_for_each(ust_app_ht, &iter, node) { |
985 | app = caa_container_of(node, struct ust_app, node); | |
421cb601 | 986 | |
5b4a0ec0 DG |
987 | ret = hashtable_del(ust_app_ht, &iter); |
988 | if (!ret) { | |
989 | call_rcu(&node->head, delete_ust_app_rcu); | |
421cb601 | 990 | } |
421cb601 DG |
991 | } |
992 | ||
5b4a0ec0 DG |
993 | hashtable_destroy(ust_app_ht); |
994 | hashtable_destroy(ust_app_sock_key_map); | |
421cb601 | 995 | |
5b4a0ec0 DG |
996 | rcu_read_unlock(); |
997 | } | |
998 | ||
999 | /* | |
1000 | * Init UST app hash table. | |
1001 | */ | |
1002 | void ust_app_ht_alloc(void) | |
1003 | { | |
1004 | ust_app_ht = hashtable_new(0); | |
1005 | ust_app_sock_key_map = hashtable_new(0); | |
421cb601 DG |
1006 | } |
1007 | ||
1008 | /* | |
5b4a0ec0 | 1009 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1010 | */ |
5b4a0ec0 | 1011 | int ust_app_create_channel_all(struct ltt_ust_session *usess, |
48842b30 DG |
1012 | struct ltt_ust_channel *uchan) |
1013 | { | |
1014 | int ret = 0; | |
1015 | struct cds_lfht_iter iter; | |
48842b30 DG |
1016 | struct ust_app *app; |
1017 | struct ust_app_session *ua_sess; | |
1018 | struct ust_app_channel *ua_chan; | |
1019 | ||
421cb601 DG |
1020 | if (usess == NULL || uchan == NULL) { |
1021 | ERR("Adding UST global channel to NULL values"); | |
1022 | ret = -1; | |
1023 | goto error; | |
1024 | } | |
1025 | ||
48842b30 DG |
1026 | DBG2("UST app adding channel %s to global domain for session uid %d", |
1027 | uchan->name, usess->uid); | |
1028 | ||
1029 | rcu_read_lock(); | |
421cb601 | 1030 | |
5b4a0ec0 DG |
1031 | /* For every registered applications */ |
1032 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
421cb601 DG |
1033 | /* Create session on the tracer side and add it to app session HT */ |
1034 | ua_sess = create_ust_app_session(usess, app); | |
509cbaf8 | 1035 | if (ua_sess == NULL) { |
5b4a0ec0 | 1036 | continue; |
48842b30 DG |
1037 | } |
1038 | ||
421cb601 DG |
1039 | /* Create channel onto application */ |
1040 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1041 | if (ua_chan == NULL) { | |
5b4a0ec0 | 1042 | continue; |
48842b30 | 1043 | } |
48842b30 | 1044 | } |
5b4a0ec0 | 1045 | |
48842b30 DG |
1046 | rcu_read_unlock(); |
1047 | ||
421cb601 | 1048 | error: |
48842b30 DG |
1049 | return ret; |
1050 | } | |
1051 | ||
5b4a0ec0 DG |
1052 | /* |
1053 | * For a specific UST session and UST channel, create the event for all | |
1054 | * registered apps. | |
1055 | */ | |
1056 | int ust_app_create_event_all(struct ltt_ust_session *usess, | |
48842b30 DG |
1057 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1058 | { | |
1059 | int ret = 0; | |
1060 | struct cds_lfht_iter iter; | |
5b4a0ec0 | 1061 | struct cds_lfht_node *ua_chan_node; |
48842b30 DG |
1062 | struct ust_app *app; |
1063 | struct ust_app_session *ua_sess; | |
1064 | struct ust_app_channel *ua_chan; | |
1065 | struct ust_app_event *ua_event; | |
48842b30 | 1066 | |
284d8f55 | 1067 | DBG("UST app creating event %s for all apps for session uid %d", |
48842b30 DG |
1068 | uevent->attr.name, usess->uid); |
1069 | ||
1070 | rcu_read_lock(); | |
421cb601 DG |
1071 | |
1072 | /* For all registered applications */ | |
5b4a0ec0 | 1073 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
ba767faf MD |
1074 | struct cds_lfht_iter uiter; |
1075 | ||
421cb601 DG |
1076 | /* Create session on the tracer side and add it to app session HT */ |
1077 | ua_sess = create_ust_app_session(usess, app); | |
509cbaf8 | 1078 | if (ua_sess == NULL) { |
5b4a0ec0 | 1079 | continue; |
48842b30 DG |
1080 | } |
1081 | ||
1082 | /* Lookup channel in the ust app session */ | |
1083 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
ba767faf MD |
1084 | (void *)uchan->name, strlen(uchan->name), |
1085 | &uiter); | |
48842b30 | 1086 | if (ua_chan_node == NULL) { |
421cb601 DG |
1087 | ERR("Channel %s not found in session uid %d. Skipping", |
1088 | uchan->name, usess->uid); | |
5b4a0ec0 | 1089 | continue; |
48842b30 | 1090 | } |
48842b30 DG |
1091 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1092 | ||
421cb601 DG |
1093 | ua_event = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1094 | if (ua_event == NULL) { | |
5b4a0ec0 | 1095 | continue; |
48842b30 | 1096 | } |
48842b30 | 1097 | } |
5b4a0ec0 | 1098 | |
48842b30 DG |
1099 | rcu_read_unlock(); |
1100 | ||
1101 | return ret; | |
1102 | } | |
1103 | ||
5b4a0ec0 DG |
1104 | /* |
1105 | * Start tracing for a specific UST session and app. | |
1106 | */ | |
421cb601 | 1107 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1108 | { |
1109 | int ret = 0; | |
1110 | struct cds_lfht_iter iter; | |
48842b30 DG |
1111 | struct ust_app_session *ua_sess; |
1112 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 1113 | struct ltt_ust_stream *ustream; |
48842b30 | 1114 | |
421cb601 | 1115 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 1116 | |
509cbaf8 MD |
1117 | rcu_read_lock(); |
1118 | ||
421cb601 DG |
1119 | ua_sess = lookup_session_by_app(usess, app); |
1120 | if (ua_sess == NULL) { | |
1121 | /* Only malloc can failed so something is really wrong */ | |
509cbaf8 | 1122 | goto error_rcu_unlock; |
421cb601 | 1123 | } |
48842b30 | 1124 | |
421cb601 DG |
1125 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1126 | if (ret < 0) { | |
509cbaf8 | 1127 | goto error_rcu_unlock; |
421cb601 | 1128 | } |
48842b30 | 1129 | |
421cb601 | 1130 | /* For each channel */ |
5b4a0ec0 | 1131 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { |
421cb601 DG |
1132 | /* Create all streams */ |
1133 | while (1) { | |
5b4a0ec0 | 1134 | /* Create UST stream */ |
421cb601 DG |
1135 | ustream = zmalloc(sizeof(*ustream)); |
1136 | if (ustream == NULL) { | |
1137 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1138 | goto error_rcu_unlock; |
421cb601 | 1139 | } |
48842b30 | 1140 | |
421cb601 DG |
1141 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
1142 | &ustream->obj); | |
48842b30 | 1143 | if (ret < 0) { |
421cb601 DG |
1144 | /* Got all streams */ |
1145 | break; | |
48842b30 | 1146 | } |
421cb601 | 1147 | ustream->handle = ustream->obj->handle; |
48842b30 | 1148 | |
421cb601 DG |
1149 | /* Order is important */ |
1150 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
477d7741 MD |
1151 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", |
1152 | ua_sess->path, ua_chan->name, | |
1153 | ua_chan->streams.count++); | |
aba8e916 DG |
1154 | if (ret < 0) { |
1155 | PERROR("asprintf UST create stream"); | |
421cb601 | 1156 | continue; |
aba8e916 | 1157 | } |
421cb601 DG |
1158 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1159 | ustream->pathname); | |
1160 | } | |
421cb601 | 1161 | } |
aba8e916 | 1162 | |
421cb601 | 1163 | /* Setup UST consumer socket and send fds to it */ |
ba5d816e | 1164 | ret = ust_consumer_send_session(ust_consumer_fd, ua_sess); |
421cb601 | 1165 | if (ret < 0) { |
509cbaf8 | 1166 | goto error_rcu_unlock; |
421cb601 | 1167 | } |
48842b30 | 1168 | |
421cb601 DG |
1169 | /* This start the UST tracing */ |
1170 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
1171 | if (ret < 0) { | |
1172 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 1173 | goto error_rcu_unlock; |
421cb601 | 1174 | } |
5b4a0ec0 | 1175 | |
509cbaf8 | 1176 | rcu_read_unlock(); |
48842b30 | 1177 | |
421cb601 DG |
1178 | /* Quiescent wait after starting trace */ |
1179 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 1180 | |
421cb601 | 1181 | return 0; |
48842b30 | 1182 | |
509cbaf8 MD |
1183 | error_rcu_unlock: |
1184 | rcu_read_unlock(); | |
421cb601 DG |
1185 | return -1; |
1186 | } | |
48842b30 | 1187 | |
5b4a0ec0 DG |
1188 | /* |
1189 | * Start tracing for the UST session. | |
1190 | */ | |
421cb601 DG |
1191 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
1192 | { | |
1193 | int ret = 0; | |
1194 | struct cds_lfht_iter iter; | |
421cb601 | 1195 | struct ust_app *app; |
48842b30 | 1196 | |
421cb601 DG |
1197 | DBG("Starting all UST traces"); |
1198 | ||
1199 | rcu_read_lock(); | |
421cb601 | 1200 | |
5b4a0ec0 | 1201 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
421cb601 | 1202 | ret = ust_app_start_trace(usess, app); |
48842b30 | 1203 | if (ret < 0) { |
5b4a0ec0 DG |
1204 | /* Continue to next apps even on error */ |
1205 | continue; | |
48842b30 | 1206 | } |
48842b30 | 1207 | } |
5b4a0ec0 | 1208 | |
48842b30 DG |
1209 | rcu_read_unlock(); |
1210 | ||
1211 | return 0; | |
1212 | } | |
487cf67c | 1213 | |
5b4a0ec0 DG |
1214 | /* |
1215 | * Add channels/events from UST global domain to registered apps at sock. | |
1216 | */ | |
487cf67c DG |
1217 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
1218 | { | |
1219 | int ret = 0; | |
487cf67c | 1220 | struct cds_lfht_iter iter; |
487cf67c DG |
1221 | struct ust_app *app; |
1222 | struct ust_app_session *ua_sess; | |
1223 | struct ust_app_channel *ua_chan; | |
1224 | struct ust_app_event *ua_event; | |
1f3580c7 DG |
1225 | |
1226 | if (usess == NULL) { | |
5b4a0ec0 | 1227 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
1228 | goto error; |
1229 | } | |
1230 | ||
487cf67c DG |
1231 | DBG2("UST app global update for app sock %d for session uid %d", sock, |
1232 | usess->uid); | |
1233 | ||
284d8f55 DG |
1234 | rcu_read_lock(); |
1235 | ||
487cf67c DG |
1236 | app = find_app_by_sock(sock); |
1237 | if (app == NULL) { | |
1238 | ERR("Failed to update app sock %d", sock); | |
1239 | goto error; | |
1240 | } | |
1241 | ||
421cb601 | 1242 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 1243 | if (ua_sess == NULL) { |
487cf67c DG |
1244 | goto error; |
1245 | } | |
1246 | ||
284d8f55 DG |
1247 | /* |
1248 | * We can iterate safely here over all UST app session sicne the create ust | |
1249 | * app session above made a shadow copy of the UST global domain from the | |
1250 | * ltt ust session. | |
1251 | */ | |
1252 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { | |
1253 | ret = create_ust_channel(app, ua_sess, ua_chan); | |
1254 | if (ret < 0) { | |
1255 | /* FIXME: Should we quit here or continue... */ | |
1256 | continue; | |
487cf67c DG |
1257 | } |
1258 | ||
284d8f55 DG |
1259 | /* For each events */ |
1260 | cds_lfht_for_each_entry(ua_chan->events, &iter, ua_event, node) { | |
1261 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); | |
1262 | if (ret < 0) { | |
1263 | /* FIXME: Should we quit here or continue... */ | |
1264 | continue; | |
487cf67c | 1265 | } |
36dc12cc | 1266 | } |
487cf67c DG |
1267 | } |
1268 | ||
36dc12cc | 1269 | if (usess->start_trace) { |
421cb601 | 1270 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 1271 | if (ret < 0) { |
36dc12cc DG |
1272 | goto error; |
1273 | } | |
1274 | ||
36dc12cc DG |
1275 | DBG2("UST trace started for app pid %d", app->key.pid); |
1276 | } | |
1277 | ||
487cf67c DG |
1278 | error: |
1279 | rcu_read_unlock(); | |
1280 | return; | |
1281 | } |