Commit | Line | Data |
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91d76f53 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
91d76f53 DG |
7 | * |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
d14d33bf AM |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
91d76f53 DG |
16 | */ |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <errno.h> | |
20 | #include <pthread.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
099e26bd | 23 | #include <string.h> |
aba8e916 DG |
24 | #include <sys/stat.h> |
25 | #include <sys/types.h> | |
099e26bd | 26 | #include <unistd.h> |
0df502fd | 27 | #include <urcu/compiler.h> |
fb54cdbf | 28 | #include <lttng/ust-error.h> |
bec39940 | 29 | |
990570ed | 30 | #include <common/common.h> |
86acf0da | 31 | #include <common/sessiond-comm/sessiond-comm.h> |
1e307fab | 32 | |
86acf0da DG |
33 | #include "fd-limit.h" |
34 | #include "health.h" | |
56fff090 | 35 | #include "ust-app.h" |
48842b30 | 36 | #include "ust-consumer.h" |
d80a6244 DG |
37 | #include "ust-ctl.h" |
38 | ||
025faf73 DG |
39 | /* |
40 | * Match function for the hash table lookup. | |
41 | * | |
42 | * It matches an ust app event based on three attributes which are the event | |
43 | * name, the filter bytecode and the loglevel. | |
44 | */ | |
18eace3b DG |
45 | static int ht_match_ust_app_event(struct cds_lfht_node *node, const void *_key) |
46 | { | |
47 | struct ust_app_event *event; | |
48 | const struct ust_app_ht_key *key; | |
49 | ||
50 | assert(node); | |
51 | assert(_key); | |
52 | ||
53 | event = caa_container_of(node, struct ust_app_event, node.node); | |
54 | key = _key; | |
55 | ||
56 | /* Match the 3 elements of the key: name, filter and loglevel. */ | |
57 | ||
58 | /* Event name */ | |
59 | if (strncmp(event->attr.name, key->name, sizeof(event->attr.name)) != 0) { | |
60 | goto no_match; | |
61 | } | |
62 | ||
63 | /* Event loglevel. */ | |
64 | if (event->attr.loglevel != key->loglevel) { | |
025faf73 DG |
65 | if (event->attr.loglevel_type == LTTNG_UST_LOGLEVEL_ALL |
66 | && key->loglevel == 0 && event->attr.loglevel == -1) { | |
67 | /* | |
68 | * Match is accepted. This is because on event creation, the | |
69 | * loglevel is set to -1 if the event loglevel type is ALL so 0 and | |
70 | * -1 are accepted for this loglevel type since 0 is the one set by | |
71 | * the API when receiving an enable event. | |
72 | */ | |
73 | } else { | |
74 | goto no_match; | |
75 | } | |
18eace3b DG |
76 | } |
77 | ||
78 | /* One of the filters is NULL, fail. */ | |
79 | if ((key->filter && !event->filter) || (!key->filter && event->filter)) { | |
80 | goto no_match; | |
81 | } | |
82 | ||
025faf73 DG |
83 | if (key->filter && event->filter) { |
84 | /* Both filters exists, check length followed by the bytecode. */ | |
85 | if (event->filter->len != key->filter->len || | |
86 | memcmp(event->filter->data, key->filter->data, | |
87 | event->filter->len) != 0) { | |
88 | goto no_match; | |
89 | } | |
18eace3b DG |
90 | } |
91 | ||
025faf73 | 92 | /* Match. */ |
18eace3b DG |
93 | return 1; |
94 | ||
95 | no_match: | |
96 | return 0; | |
18eace3b DG |
97 | } |
98 | ||
025faf73 DG |
99 | /* |
100 | * Unique add of an ust app event in the given ht. This uses the custom | |
101 | * ht_match_ust_app_event match function and the event name as hash. | |
102 | */ | |
18eace3b DG |
103 | static void add_unique_ust_app_event(struct lttng_ht *ht, |
104 | struct ust_app_event *event) | |
105 | { | |
106 | struct cds_lfht_node *node_ptr; | |
107 | struct ust_app_ht_key key; | |
108 | ||
109 | assert(ht); | |
110 | assert(ht->ht); | |
111 | assert(event); | |
112 | ||
113 | key.name = event->attr.name; | |
114 | key.filter = event->filter; | |
115 | key.loglevel = event->attr.loglevel; | |
116 | ||
117 | node_ptr = cds_lfht_add_unique(ht->ht, | |
118 | ht->hash_fct(event->node.key, lttng_ht_seed), | |
119 | ht_match_ust_app_event, &key, &event->node.node); | |
120 | assert(node_ptr == &event->node.node); | |
121 | } | |
122 | ||
55cc08a6 DG |
123 | /* |
124 | * Delete ust context safely. RCU read lock must be held before calling | |
125 | * this function. | |
126 | */ | |
127 | static | |
128 | void delete_ust_app_ctx(int sock, struct ust_app_ctx *ua_ctx) | |
129 | { | |
130 | if (ua_ctx->obj) { | |
131 | ustctl_release_object(sock, ua_ctx->obj); | |
132 | free(ua_ctx->obj); | |
133 | } | |
134 | free(ua_ctx); | |
135 | } | |
136 | ||
d80a6244 DG |
137 | /* |
138 | * Delete ust app event safely. RCU read lock must be held before calling | |
139 | * this function. | |
140 | */ | |
8b366481 DG |
141 | static |
142 | void delete_ust_app_event(int sock, struct ust_app_event *ua_event) | |
d80a6244 | 143 | { |
53a80697 | 144 | free(ua_event->filter); |
d80a6244 | 145 | |
edb67388 DG |
146 | if (ua_event->obj != NULL) { |
147 | ustctl_release_object(sock, ua_event->obj); | |
148 | free(ua_event->obj); | |
149 | } | |
d80a6244 DG |
150 | free(ua_event); |
151 | } | |
152 | ||
153 | /* | |
154 | * Delete ust app stream safely. RCU read lock must be held before calling | |
155 | * this function. | |
156 | */ | |
8b366481 DG |
157 | static |
158 | void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream) | |
d80a6244 | 159 | { |
8b366481 DG |
160 | if (stream->obj) { |
161 | ustctl_release_object(sock, stream->obj); | |
4063050c | 162 | lttng_fd_put(LTTNG_FD_APPS, 2); |
8b366481 DG |
163 | free(stream->obj); |
164 | } | |
84cd17c6 | 165 | free(stream); |
d80a6244 DG |
166 | } |
167 | ||
168 | /* | |
169 | * Delete ust app channel safely. RCU read lock must be held before calling | |
170 | * this function. | |
171 | */ | |
8b366481 DG |
172 | static |
173 | void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan) | |
d80a6244 DG |
174 | { |
175 | int ret; | |
bec39940 | 176 | struct lttng_ht_iter iter; |
d80a6244 | 177 | struct ust_app_event *ua_event; |
55cc08a6 | 178 | struct ust_app_ctx *ua_ctx; |
d80a6244 DG |
179 | struct ltt_ust_stream *stream, *stmp; |
180 | ||
55cc08a6 | 181 | /* Wipe stream */ |
d80a6244 | 182 | cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) { |
84cd17c6 | 183 | cds_list_del(&stream->list); |
d80a6244 DG |
184 | delete_ust_app_stream(sock, stream); |
185 | } | |
186 | ||
55cc08a6 | 187 | /* Wipe context */ |
bec39940 DG |
188 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter.iter, ua_ctx, node.node) { |
189 | ret = lttng_ht_del(ua_chan->ctx, &iter); | |
55cc08a6 DG |
190 | assert(!ret); |
191 | delete_ust_app_ctx(sock, ua_ctx); | |
192 | } | |
bec39940 | 193 | lttng_ht_destroy(ua_chan->ctx); |
d80a6244 | 194 | |
55cc08a6 | 195 | /* Wipe events */ |
bec39940 DG |
196 | cds_lfht_for_each_entry(ua_chan->events->ht, &iter.iter, ua_event, |
197 | node.node) { | |
198 | ret = lttng_ht_del(ua_chan->events, &iter); | |
525b0740 | 199 | assert(!ret); |
d80a6244 DG |
200 | delete_ust_app_event(sock, ua_event); |
201 | } | |
bec39940 | 202 | lttng_ht_destroy(ua_chan->events); |
edb67388 DG |
203 | |
204 | if (ua_chan->obj != NULL) { | |
205 | ustctl_release_object(sock, ua_chan->obj); | |
4063050c | 206 | lttng_fd_put(LTTNG_FD_APPS, 2); |
edb67388 DG |
207 | free(ua_chan->obj); |
208 | } | |
84cd17c6 | 209 | free(ua_chan); |
d80a6244 DG |
210 | } |
211 | ||
212 | /* | |
213 | * Delete ust app session safely. RCU read lock must be held before calling | |
214 | * this function. | |
215 | */ | |
8b366481 DG |
216 | static |
217 | void delete_ust_app_session(int sock, struct ust_app_session *ua_sess) | |
d80a6244 DG |
218 | { |
219 | int ret; | |
bec39940 | 220 | struct lttng_ht_iter iter; |
d80a6244 DG |
221 | struct ust_app_channel *ua_chan; |
222 | ||
223 | if (ua_sess->metadata) { | |
8b366481 DG |
224 | if (ua_sess->metadata->stream_obj) { |
225 | ustctl_release_object(sock, ua_sess->metadata->stream_obj); | |
4063050c | 226 | lttng_fd_put(LTTNG_FD_APPS, 2); |
8b366481 DG |
227 | free(ua_sess->metadata->stream_obj); |
228 | } | |
229 | if (ua_sess->metadata->obj) { | |
230 | ustctl_release_object(sock, ua_sess->metadata->obj); | |
4063050c | 231 | lttng_fd_put(LTTNG_FD_APPS, 2); |
8b366481 DG |
232 | free(ua_sess->metadata->obj); |
233 | } | |
a2c0da86 | 234 | trace_ust_destroy_metadata(ua_sess->metadata); |
d80a6244 DG |
235 | } |
236 | ||
bec39940 DG |
237 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
238 | node.node) { | |
239 | ret = lttng_ht_del(ua_sess->channels, &iter); | |
525b0740 | 240 | assert(!ret); |
d80a6244 DG |
241 | delete_ust_app_channel(sock, ua_chan); |
242 | } | |
bec39940 | 243 | lttng_ht_destroy(ua_sess->channels); |
d80a6244 | 244 | |
aee6bafd MD |
245 | if (ua_sess->handle != -1) { |
246 | ustctl_release_handle(sock, ua_sess->handle); | |
247 | } | |
8b366481 | 248 | free(ua_sess); |
d80a6244 | 249 | } |
91d76f53 DG |
250 | |
251 | /* | |
284d8f55 DG |
252 | * Delete a traceable application structure from the global list. Never call |
253 | * this function outside of a call_rcu call. | |
91d76f53 | 254 | */ |
8b366481 DG |
255 | static |
256 | void delete_ust_app(struct ust_app *app) | |
91d76f53 | 257 | { |
8b366481 | 258 | int ret, sock; |
bec39940 | 259 | struct lttng_ht_iter iter; |
284d8f55 | 260 | struct ust_app_session *ua_sess; |
44d3bd01 | 261 | |
f6a9efaa | 262 | rcu_read_lock(); |
44d3bd01 | 263 | |
d80a6244 | 264 | /* Delete ust app sessions info */ |
852d0037 DG |
265 | sock = app->sock; |
266 | app->sock = -1; | |
d80a6244 | 267 | |
8b366481 | 268 | /* Wipe sessions */ |
bec39940 DG |
269 | cds_lfht_for_each_entry(app->sessions->ht, &iter.iter, ua_sess, |
270 | node.node) { | |
271 | ret = lttng_ht_del(app->sessions, &iter); | |
c4a1715b DG |
272 | if (ret) { |
273 | /* The session is already scheduled for teardown. */ | |
274 | continue; | |
275 | } | |
852d0037 | 276 | delete_ust_app_session(app->sock, ua_sess); |
d80a6244 | 277 | } |
bec39940 | 278 | lttng_ht_destroy(app->sessions); |
d80a6244 | 279 | |
6414a713 | 280 | /* |
852d0037 DG |
281 | * Wait until we have deleted the application from the sock hash table |
282 | * before closing this socket, otherwise an application could re-use the | |
283 | * socket ID and race with the teardown, using the same hash table entry. | |
284 | * | |
285 | * It's OK to leave the close in call_rcu. We want it to stay unique for | |
286 | * all RCU readers that could run concurrently with unregister app, | |
287 | * therefore we _need_ to only close that socket after a grace period. So | |
288 | * it should stay in this RCU callback. | |
289 | * | |
290 | * This close() is a very important step of the synchronization model so | |
291 | * every modification to this function must be carefully reviewed. | |
6414a713 | 292 | */ |
799e2c4f MD |
293 | ret = close(sock); |
294 | if (ret) { | |
295 | PERROR("close"); | |
296 | } | |
4063050c | 297 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d80a6244 | 298 | |
852d0037 | 299 | DBG2("UST app pid %d deleted", app->pid); |
284d8f55 | 300 | free(app); |
bec39940 | 301 | |
f6a9efaa | 302 | rcu_read_unlock(); |
099e26bd DG |
303 | } |
304 | ||
305 | /* | |
f6a9efaa | 306 | * URCU intermediate call to delete an UST app. |
099e26bd | 307 | */ |
8b366481 DG |
308 | static |
309 | void delete_ust_app_rcu(struct rcu_head *head) | |
099e26bd | 310 | { |
bec39940 DG |
311 | struct lttng_ht_node_ulong *node = |
312 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa | 313 | struct ust_app *app = |
852d0037 | 314 | caa_container_of(node, struct ust_app, pid_n); |
f6a9efaa | 315 | |
852d0037 | 316 | DBG3("Call RCU deleting app PID %d", app->pid); |
f6a9efaa | 317 | delete_ust_app(app); |
099e26bd DG |
318 | } |
319 | ||
8b366481 DG |
320 | /* |
321 | * Alloc new UST app session. | |
322 | */ | |
323 | static | |
324 | struct ust_app_session *alloc_ust_app_session(void) | |
325 | { | |
326 | struct ust_app_session *ua_sess; | |
327 | ||
328 | /* Init most of the default value by allocating and zeroing */ | |
329 | ua_sess = zmalloc(sizeof(struct ust_app_session)); | |
330 | if (ua_sess == NULL) { | |
331 | PERROR("malloc"); | |
332 | goto error; | |
333 | } | |
334 | ||
335 | ua_sess->handle = -1; | |
bec39940 | 336 | ua_sess->channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
8b366481 DG |
337 | |
338 | return ua_sess; | |
339 | ||
340 | error: | |
341 | return NULL; | |
342 | } | |
343 | ||
344 | /* | |
345 | * Alloc new UST app channel. | |
346 | */ | |
347 | static | |
348 | struct ust_app_channel *alloc_ust_app_channel(char *name, | |
349 | struct lttng_ust_channel *attr) | |
350 | { | |
351 | struct ust_app_channel *ua_chan; | |
352 | ||
353 | /* Init most of the default value by allocating and zeroing */ | |
354 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); | |
355 | if (ua_chan == NULL) { | |
356 | PERROR("malloc"); | |
357 | goto error; | |
358 | } | |
359 | ||
360 | /* Setup channel name */ | |
361 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
362 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
363 | ||
364 | ua_chan->enabled = 1; | |
365 | ua_chan->handle = -1; | |
bec39940 DG |
366 | ua_chan->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
367 | ua_chan->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); | |
368 | lttng_ht_node_init_str(&ua_chan->node, ua_chan->name); | |
8b366481 DG |
369 | |
370 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); | |
371 | ||
372 | /* Copy attributes */ | |
373 | if (attr) { | |
374 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
375 | } | |
376 | ||
377 | DBG3("UST app channel %s allocated", ua_chan->name); | |
378 | ||
379 | return ua_chan; | |
380 | ||
381 | error: | |
382 | return NULL; | |
383 | } | |
384 | ||
385 | /* | |
386 | * Alloc new UST app event. | |
387 | */ | |
388 | static | |
389 | struct ust_app_event *alloc_ust_app_event(char *name, | |
390 | struct lttng_ust_event *attr) | |
391 | { | |
392 | struct ust_app_event *ua_event; | |
393 | ||
394 | /* Init most of the default value by allocating and zeroing */ | |
395 | ua_event = zmalloc(sizeof(struct ust_app_event)); | |
396 | if (ua_event == NULL) { | |
397 | PERROR("malloc"); | |
398 | goto error; | |
399 | } | |
400 | ||
401 | ua_event->enabled = 1; | |
402 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
403 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
bec39940 | 404 | lttng_ht_node_init_str(&ua_event->node, ua_event->name); |
8b366481 DG |
405 | |
406 | /* Copy attributes */ | |
407 | if (attr) { | |
408 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
409 | } | |
410 | ||
411 | DBG3("UST app event %s allocated", ua_event->name); | |
412 | ||
413 | return ua_event; | |
414 | ||
415 | error: | |
416 | return NULL; | |
417 | } | |
418 | ||
419 | /* | |
420 | * Alloc new UST app context. | |
421 | */ | |
422 | static | |
423 | struct ust_app_ctx *alloc_ust_app_ctx(struct lttng_ust_context *uctx) | |
424 | { | |
425 | struct ust_app_ctx *ua_ctx; | |
426 | ||
427 | ua_ctx = zmalloc(sizeof(struct ust_app_ctx)); | |
428 | if (ua_ctx == NULL) { | |
429 | goto error; | |
430 | } | |
431 | ||
432 | if (uctx) { | |
433 | memcpy(&ua_ctx->ctx, uctx, sizeof(ua_ctx->ctx)); | |
434 | } | |
435 | ||
436 | DBG3("UST app context %d allocated", ua_ctx->ctx.ctx); | |
437 | ||
438 | error: | |
439 | return ua_ctx; | |
440 | } | |
441 | ||
025faf73 DG |
442 | /* |
443 | * Allocate a filter and copy the given original filter. | |
444 | * | |
445 | * Return allocated filter or NULL on error. | |
446 | */ | |
447 | static struct lttng_ust_filter_bytecode *alloc_copy_ust_app_filter( | |
448 | struct lttng_ust_filter_bytecode *orig_f) | |
449 | { | |
450 | struct lttng_ust_filter_bytecode *filter = NULL; | |
451 | ||
452 | /* Copy filter bytecode */ | |
453 | filter = zmalloc(sizeof(*filter) + orig_f->len); | |
454 | if (!filter) { | |
455 | PERROR("zmalloc alloc ust app filter"); | |
456 | goto error; | |
457 | } | |
458 | ||
459 | memcpy(filter, orig_f, sizeof(*filter) + orig_f->len); | |
460 | ||
461 | error: | |
462 | return filter; | |
463 | } | |
464 | ||
099e26bd | 465 | /* |
421cb601 DG |
466 | * Find an ust_app using the sock and return it. RCU read side lock must be |
467 | * held before calling this helper function. | |
099e26bd | 468 | */ |
8b366481 DG |
469 | static |
470 | struct ust_app *find_app_by_sock(int sock) | |
099e26bd | 471 | { |
bec39940 | 472 | struct lttng_ht_node_ulong *node; |
bec39940 | 473 | struct lttng_ht_iter iter; |
f6a9efaa | 474 | |
852d0037 | 475 | lttng_ht_lookup(ust_app_ht_by_sock, (void *)((unsigned long) sock), &iter); |
bec39940 | 476 | node = lttng_ht_iter_get_node_ulong(&iter); |
f6a9efaa DG |
477 | if (node == NULL) { |
478 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
479 | goto error; |
480 | } | |
852d0037 DG |
481 | |
482 | return caa_container_of(node, struct ust_app, sock_n); | |
f6a9efaa DG |
483 | |
484 | error: | |
485 | return NULL; | |
099e26bd DG |
486 | } |
487 | ||
025faf73 DG |
488 | /* |
489 | * Lookup for an ust app event based on event name, filter bytecode and the | |
490 | * event loglevel. | |
491 | * | |
492 | * Return an ust_app_event object or NULL on error. | |
493 | */ | |
18eace3b DG |
494 | static struct ust_app_event *find_ust_app_event(struct lttng_ht *ht, |
495 | char *name, struct lttng_ust_filter_bytecode *filter, int loglevel) | |
496 | { | |
497 | struct lttng_ht_iter iter; | |
498 | struct lttng_ht_node_str *node; | |
499 | struct ust_app_event *event = NULL; | |
500 | struct ust_app_ht_key key; | |
18eace3b DG |
501 | |
502 | assert(name); | |
503 | assert(ht); | |
504 | ||
505 | /* Setup key for event lookup. */ | |
506 | key.name = name; | |
507 | key.filter = filter; | |
508 | key.loglevel = loglevel; | |
509 | ||
025faf73 DG |
510 | /* Lookup using the event name as hash and a custom match fct. */ |
511 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), | |
512 | ht_match_ust_app_event, &key, &iter.iter); | |
18eace3b DG |
513 | node = lttng_ht_iter_get_node_str(&iter); |
514 | if (node == NULL) { | |
515 | goto end; | |
516 | } | |
517 | ||
518 | event = caa_container_of(node, struct ust_app_event, node); | |
519 | ||
520 | end: | |
18eace3b DG |
521 | return event; |
522 | } | |
523 | ||
55cc08a6 DG |
524 | /* |
525 | * Create the channel context on the tracer. | |
526 | */ | |
527 | static | |
528 | int create_ust_channel_context(struct ust_app_channel *ua_chan, | |
529 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
530 | { | |
531 | int ret; | |
532 | ||
86acf0da DG |
533 | health_code_update(&health_thread_cmd); |
534 | ||
852d0037 | 535 | ret = ustctl_add_context(app->sock, &ua_ctx->ctx, |
55cc08a6 DG |
536 | ua_chan->obj, &ua_ctx->obj); |
537 | if (ret < 0) { | |
538 | goto error; | |
539 | } | |
540 | ||
541 | ua_ctx->handle = ua_ctx->obj->handle; | |
542 | ||
727d5404 | 543 | DBG2("UST app context created successfully for channel %s", ua_chan->name); |
55cc08a6 DG |
544 | |
545 | error: | |
86acf0da | 546 | health_code_update(&health_thread_cmd); |
55cc08a6 DG |
547 | return ret; |
548 | } | |
549 | ||
53a80697 MD |
550 | /* |
551 | * Set the filter on the tracer. | |
552 | */ | |
553 | static | |
554 | int set_ust_event_filter(struct ust_app_event *ua_event, | |
555 | struct ust_app *app) | |
556 | { | |
557 | int ret; | |
558 | ||
86acf0da DG |
559 | health_code_update(&health_thread_cmd); |
560 | ||
53a80697 | 561 | if (!ua_event->filter) { |
86acf0da DG |
562 | ret = 0; |
563 | goto error; | |
53a80697 MD |
564 | } |
565 | ||
566 | ret = ustctl_set_filter(app->sock, ua_event->filter, | |
567 | ua_event->obj); | |
568 | if (ret < 0) { | |
569 | goto error; | |
570 | } | |
571 | ||
572 | DBG2("UST filter set successfully for event %s", ua_event->name); | |
573 | ||
574 | error: | |
86acf0da | 575 | health_code_update(&health_thread_cmd); |
53a80697 MD |
576 | return ret; |
577 | } | |
578 | ||
9730260e DG |
579 | /* |
580 | * Disable the specified event on to UST tracer for the UST session. | |
581 | */ | |
582 | static int disable_ust_event(struct ust_app *app, | |
583 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
584 | { | |
585 | int ret; | |
586 | ||
86acf0da DG |
587 | health_code_update(&health_thread_cmd); |
588 | ||
852d0037 | 589 | ret = ustctl_disable(app->sock, ua_event->obj); |
9730260e DG |
590 | if (ret < 0) { |
591 | ERR("UST app event %s disable failed for app (pid: %d) " | |
592 | "and session handle %d with ret %d", | |
852d0037 | 593 | ua_event->attr.name, app->pid, ua_sess->handle, ret); |
9730260e DG |
594 | goto error; |
595 | } | |
596 | ||
597 | DBG2("UST app event %s disabled successfully for app (pid: %d)", | |
852d0037 | 598 | ua_event->attr.name, app->pid); |
9730260e DG |
599 | |
600 | error: | |
86acf0da | 601 | health_code_update(&health_thread_cmd); |
9730260e DG |
602 | return ret; |
603 | } | |
604 | ||
78f0bacd DG |
605 | /* |
606 | * Disable the specified channel on to UST tracer for the UST session. | |
607 | */ | |
608 | static int disable_ust_channel(struct ust_app *app, | |
609 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
610 | { | |
611 | int ret; | |
612 | ||
86acf0da DG |
613 | health_code_update(&health_thread_cmd); |
614 | ||
852d0037 | 615 | ret = ustctl_disable(app->sock, ua_chan->obj); |
78f0bacd DG |
616 | if (ret < 0) { |
617 | ERR("UST app channel %s disable failed for app (pid: %d) " | |
618 | "and session handle %d with ret %d", | |
852d0037 | 619 | ua_chan->name, app->pid, ua_sess->handle, ret); |
78f0bacd DG |
620 | goto error; |
621 | } | |
622 | ||
78f0bacd | 623 | DBG2("UST app channel %s disabled successfully for app (pid: %d)", |
852d0037 | 624 | ua_chan->name, app->pid); |
78f0bacd DG |
625 | |
626 | error: | |
86acf0da | 627 | health_code_update(&health_thread_cmd); |
78f0bacd DG |
628 | return ret; |
629 | } | |
630 | ||
631 | /* | |
632 | * Enable the specified channel on to UST tracer for the UST session. | |
633 | */ | |
634 | static int enable_ust_channel(struct ust_app *app, | |
635 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
636 | { | |
637 | int ret; | |
638 | ||
86acf0da DG |
639 | health_code_update(&health_thread_cmd); |
640 | ||
852d0037 | 641 | ret = ustctl_enable(app->sock, ua_chan->obj); |
78f0bacd DG |
642 | if (ret < 0) { |
643 | ERR("UST app channel %s enable failed for app (pid: %d) " | |
644 | "and session handle %d with ret %d", | |
852d0037 | 645 | ua_chan->name, app->pid, ua_sess->handle, ret); |
78f0bacd DG |
646 | goto error; |
647 | } | |
648 | ||
649 | ua_chan->enabled = 1; | |
650 | ||
651 | DBG2("UST app channel %s enabled successfully for app (pid: %d)", | |
852d0037 | 652 | ua_chan->name, app->pid); |
78f0bacd DG |
653 | |
654 | error: | |
86acf0da | 655 | health_code_update(&health_thread_cmd); |
78f0bacd DG |
656 | return ret; |
657 | } | |
658 | ||
edb67388 DG |
659 | /* |
660 | * Enable the specified event on to UST tracer for the UST session. | |
661 | */ | |
662 | static int enable_ust_event(struct ust_app *app, | |
663 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
664 | { | |
665 | int ret; | |
666 | ||
86acf0da DG |
667 | health_code_update(&health_thread_cmd); |
668 | ||
852d0037 | 669 | ret = ustctl_enable(app->sock, ua_event->obj); |
edb67388 DG |
670 | if (ret < 0) { |
671 | ERR("UST app event %s enable failed for app (pid: %d) " | |
672 | "and session handle %d with ret %d", | |
852d0037 | 673 | ua_event->attr.name, app->pid, ua_sess->handle, ret); |
edb67388 DG |
674 | goto error; |
675 | } | |
676 | ||
677 | DBG2("UST app event %s enabled successfully for app (pid: %d)", | |
852d0037 | 678 | ua_event->attr.name, app->pid); |
edb67388 DG |
679 | |
680 | error: | |
86acf0da | 681 | health_code_update(&health_thread_cmd); |
edb67388 DG |
682 | return ret; |
683 | } | |
684 | ||
099e26bd | 685 | /* |
5b4a0ec0 | 686 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 687 | */ |
5b4a0ec0 DG |
688 | static int open_ust_metadata(struct ust_app *app, |
689 | struct ust_app_session *ua_sess) | |
0177d773 | 690 | { |
5b4a0ec0 DG |
691 | int ret; |
692 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 693 | |
86acf0da DG |
694 | health_code_update(&health_thread_cmd); |
695 | ||
5b4a0ec0 DG |
696 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
697 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
698 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
699 | uattr.switch_timer_interval = | |
700 | ua_sess->metadata->attr.switch_timer_interval; | |
701 | uattr.read_timer_interval = | |
702 | ua_sess->metadata->attr.read_timer_interval; | |
703 | uattr.output = ua_sess->metadata->attr.output; | |
704 | ||
4063050c MD |
705 | /* We are going to receive 2 fds, we need to reserve them. */ |
706 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
707 | if (ret < 0) { | |
708 | ERR("Exhausted number of available FD upon metadata open"); | |
709 | goto error; | |
710 | } | |
5b4a0ec0 | 711 | /* UST tracer metadata creation */ |
852d0037 | 712 | ret = ustctl_open_metadata(app->sock, ua_sess->handle, &uattr, |
5b4a0ec0 DG |
713 | &ua_sess->metadata->obj); |
714 | if (ret < 0) { | |
fc34caaa | 715 | ERR("UST app open metadata failed for app pid:%d with ret %d", |
852d0037 | 716 | app->pid, ret); |
f6a9efaa | 717 | goto error; |
0177d773 | 718 | } |
f6a9efaa | 719 | |
6d3686da DG |
720 | ua_sess->metadata->handle = ua_sess->metadata->obj->handle; |
721 | ||
f6a9efaa | 722 | error: |
86acf0da | 723 | health_code_update(&health_thread_cmd); |
5b4a0ec0 | 724 | return ret; |
91d76f53 DG |
725 | } |
726 | ||
727 | /* | |
5b4a0ec0 | 728 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 729 | */ |
5b4a0ec0 DG |
730 | static int create_ust_stream(struct ust_app *app, |
731 | struct ust_app_session *ua_sess) | |
91d76f53 | 732 | { |
5b4a0ec0 | 733 | int ret; |
421cb601 | 734 | |
86acf0da DG |
735 | health_code_update(&health_thread_cmd); |
736 | ||
4063050c MD |
737 | /* We are going to receive 2 fds, we need to reserve them. */ |
738 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
739 | if (ret < 0) { | |
740 | ERR("Exhausted number of available FD upon metadata stream create"); | |
741 | goto error; | |
742 | } | |
852d0037 | 743 | ret = ustctl_create_stream(app->sock, ua_sess->metadata->obj, |
5b4a0ec0 DG |
744 | &ua_sess->metadata->stream_obj); |
745 | if (ret < 0) { | |
746 | ERR("UST create metadata stream failed"); | |
421cb601 | 747 | goto error; |
91d76f53 | 748 | } |
421cb601 | 749 | |
421cb601 | 750 | error: |
86acf0da | 751 | health_code_update(&health_thread_cmd); |
5b4a0ec0 | 752 | return ret; |
91d76f53 DG |
753 | } |
754 | ||
b551a063 | 755 | /* |
5b4a0ec0 | 756 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 757 | */ |
5b4a0ec0 DG |
758 | static int create_ust_channel(struct ust_app *app, |
759 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 760 | { |
5b4a0ec0 | 761 | int ret; |
b551a063 | 762 | |
86acf0da DG |
763 | health_code_update(&health_thread_cmd); |
764 | ||
5b4a0ec0 | 765 | /* TODO: remove cast and use lttng-ust-abi.h */ |
4063050c MD |
766 | |
767 | /* We are going to receive 2 fds, we need to reserve them. */ | |
768 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
769 | if (ret < 0) { | |
770 | ERR("Exhausted number of available FD upon create channel"); | |
771 | goto error; | |
772 | } | |
86acf0da DG |
773 | |
774 | health_code_update(&health_thread_cmd); | |
775 | ||
852d0037 | 776 | ret = ustctl_create_channel(app->sock, ua_sess->handle, |
5b4a0ec0 DG |
777 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); |
778 | if (ret < 0) { | |
58f3ca76 | 779 | ERR("Creating channel %s for app (pid: %d, sock: %d) " |
5b4a0ec0 | 780 | "and session handle %d with ret %d", |
852d0037 | 781 | ua_chan->name, app->pid, app->sock, |
5b4a0ec0 | 782 | ua_sess->handle, ret); |
4063050c | 783 | lttng_fd_put(LTTNG_FD_APPS, 2); |
b551a063 DG |
784 | goto error; |
785 | } | |
786 | ||
5b4a0ec0 | 787 | ua_chan->handle = ua_chan->obj->handle; |
b551a063 | 788 | |
5b4a0ec0 | 789 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
852d0037 | 790 | ua_chan->name, app->pid, app->sock); |
b551a063 | 791 | |
86acf0da DG |
792 | health_code_update(&health_thread_cmd); |
793 | ||
8535a6d9 DG |
794 | /* If channel is not enabled, disable it on the tracer */ |
795 | if (!ua_chan->enabled) { | |
796 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
797 | if (ret < 0) { | |
798 | goto error; | |
799 | } | |
800 | } | |
801 | ||
b551a063 | 802 | error: |
86acf0da | 803 | health_code_update(&health_thread_cmd); |
b551a063 DG |
804 | return ret; |
805 | } | |
806 | ||
91d76f53 | 807 | /* |
5b4a0ec0 | 808 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 809 | */ |
edb67388 DG |
810 | static |
811 | int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess, | |
812 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event) | |
91d76f53 | 813 | { |
5b4a0ec0 | 814 | int ret = 0; |
284d8f55 | 815 | |
86acf0da DG |
816 | health_code_update(&health_thread_cmd); |
817 | ||
5b4a0ec0 | 818 | /* Create UST event on tracer */ |
852d0037 | 819 | ret = ustctl_create_event(app->sock, &ua_event->attr, ua_chan->obj, |
5b4a0ec0 DG |
820 | &ua_event->obj); |
821 | if (ret < 0) { | |
822 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
852d0037 | 823 | ua_event->attr.name, app->pid, ret); |
5b4a0ec0 | 824 | goto error; |
91d76f53 | 825 | } |
f6a9efaa | 826 | |
5b4a0ec0 | 827 | ua_event->handle = ua_event->obj->handle; |
284d8f55 | 828 | |
5b4a0ec0 | 829 | DBG2("UST app event %s created successfully for pid:%d", |
852d0037 | 830 | ua_event->attr.name, app->pid); |
f6a9efaa | 831 | |
86acf0da DG |
832 | health_code_update(&health_thread_cmd); |
833 | ||
025faf73 DG |
834 | /* Set filter if one is present. */ |
835 | if (ua_event->filter) { | |
836 | ret = set_ust_event_filter(ua_event, app); | |
837 | if (ret < 0) { | |
838 | goto error; | |
839 | } | |
840 | } | |
841 | ||
8535a6d9 | 842 | /* If event not enabled, disable it on the tracer */ |
fc34caaa | 843 | if (ua_event->enabled == 0) { |
8535a6d9 DG |
844 | ret = disable_ust_event(app, ua_sess, ua_event); |
845 | if (ret < 0) { | |
fc34caaa DG |
846 | /* |
847 | * If we hit an EPERM, something is wrong with our disable call. If | |
848 | * we get an EEXIST, there is a problem on the tracer side since we | |
849 | * just created it. | |
850 | */ | |
851 | switch (ret) { | |
49c336c1 | 852 | case -LTTNG_UST_ERR_PERM: |
fc34caaa DG |
853 | /* Code flow problem */ |
854 | assert(0); | |
49c336c1 | 855 | case -LTTNG_UST_ERR_EXIST: |
fc34caaa DG |
856 | /* It's OK for our use case. */ |
857 | ret = 0; | |
858 | break; | |
859 | default: | |
860 | break; | |
861 | } | |
8535a6d9 DG |
862 | goto error; |
863 | } | |
864 | } | |
865 | ||
5b4a0ec0 | 866 | error: |
86acf0da | 867 | health_code_update(&health_thread_cmd); |
5b4a0ec0 | 868 | return ret; |
91d76f53 | 869 | } |
48842b30 | 870 | |
5b4a0ec0 DG |
871 | /* |
872 | * Copy data between an UST app event and a LTT event. | |
873 | */ | |
421cb601 | 874 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
875 | struct ltt_ust_event *uevent) |
876 | { | |
877 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); | |
878 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
879 | ||
fc34caaa DG |
880 | ua_event->enabled = uevent->enabled; |
881 | ||
5b4a0ec0 DG |
882 | /* Copy event attributes */ |
883 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
884 | ||
53a80697 MD |
885 | /* Copy filter bytecode */ |
886 | if (uevent->filter) { | |
025faf73 DG |
887 | ua_event->filter = alloc_copy_ust_app_filter(uevent->filter); |
888 | /* Filter might be NULL here in case of ENONEM. */ | |
53a80697 | 889 | } |
48842b30 DG |
890 | } |
891 | ||
5b4a0ec0 DG |
892 | /* |
893 | * Copy data between an UST app channel and a LTT channel. | |
894 | */ | |
421cb601 | 895 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
896 | struct ltt_ust_channel *uchan) |
897 | { | |
bec39940 | 898 | struct lttng_ht_iter iter; |
48842b30 | 899 | struct ltt_ust_event *uevent; |
55cc08a6 | 900 | struct ltt_ust_context *uctx; |
48842b30 | 901 | struct ust_app_event *ua_event; |
55cc08a6 | 902 | struct ust_app_ctx *ua_ctx; |
48842b30 | 903 | |
fc34caaa | 904 | DBG2("UST app shadow copy of channel %s started", ua_chan->name); |
48842b30 DG |
905 | |
906 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
907 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
908 | /* Copy event attributes */ |
909 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 | 910 | |
fc34caaa DG |
911 | ua_chan->enabled = uchan->enabled; |
912 | ||
bec39940 | 913 | cds_lfht_for_each_entry(uchan->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
914 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
915 | if (ua_ctx == NULL) { | |
916 | continue; | |
917 | } | |
bec39940 DG |
918 | lttng_ht_node_init_ulong(&ua_ctx->node, |
919 | (unsigned long) ua_ctx->ctx.ctx); | |
920 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 | 921 | } |
48842b30 | 922 | |
421cb601 | 923 | /* Copy all events from ltt ust channel to ust app channel */ |
bec39940 | 924 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
18eace3b DG |
925 | ua_event = find_ust_app_event(ua_chan->events, uevent->attr.name, |
926 | uevent->filter, uevent->attr.loglevel); | |
927 | if (ua_event == NULL) { | |
421cb601 | 928 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 929 | uevent->attr.name); |
284d8f55 | 930 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 931 | if (ua_event == NULL) { |
5b4a0ec0 | 932 | continue; |
48842b30 | 933 | } |
421cb601 | 934 | shadow_copy_event(ua_event, uevent); |
18eace3b | 935 | add_unique_ust_app_event(ua_chan->events, ua_event); |
48842b30 | 936 | } |
48842b30 DG |
937 | } |
938 | ||
fc34caaa | 939 | DBG3("UST app shadow copy of channel %s done", ua_chan->name); |
48842b30 DG |
940 | } |
941 | ||
5b4a0ec0 DG |
942 | /* |
943 | * Copy data between a UST app session and a regular LTT session. | |
944 | */ | |
421cb601 | 945 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
bec39940 | 946 | struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 | 947 | { |
bec39940 DG |
948 | struct lttng_ht_node_str *ua_chan_node; |
949 | struct lttng_ht_iter iter; | |
48842b30 DG |
950 | struct ltt_ust_channel *uchan; |
951 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
952 | time_t rawtime; |
953 | struct tm *timeinfo; | |
954 | char datetime[16]; | |
955 | int ret; | |
956 | ||
957 | /* Get date and time for unique app path */ | |
958 | time(&rawtime); | |
959 | timeinfo = localtime(&rawtime); | |
960 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 961 | |
421cb601 | 962 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 | 963 | |
a991f516 | 964 | ua_sess->id = usess->id; |
6df2e2c9 MD |
965 | ua_sess->uid = usess->uid; |
966 | ua_sess->gid = usess->gid; | |
48842b30 | 967 | |
00e2e675 DG |
968 | ret = snprintf(ua_sess->path, PATH_MAX, "%s-%d-%s/", app->name, app->pid, |
969 | datetime); | |
477d7741 MD |
970 | if (ret < 0) { |
971 | PERROR("asprintf UST shadow copy session"); | |
972 | /* TODO: We cannot return an error from here.. */ | |
973 | assert(0); | |
974 | } | |
975 | ||
48842b30 DG |
976 | /* TODO: support all UST domain */ |
977 | ||
978 | /* Iterate over all channels in global domain. */ | |
bec39940 DG |
979 | cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter, |
980 | uchan, node.node) { | |
981 | struct lttng_ht_iter uiter; | |
ba767faf | 982 | |
bec39940 DG |
983 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
984 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
5b4a0ec0 | 985 | if (ua_chan_node != NULL) { |
fc34caaa | 986 | /* Session exist. Contiuing. */ |
5b4a0ec0 DG |
987 | continue; |
988 | } | |
421cb601 | 989 | |
5b4a0ec0 DG |
990 | DBG2("Channel %s not found on shadow session copy, creating it", |
991 | uchan->name); | |
992 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
993 | if (ua_chan == NULL) { | |
fc34caaa | 994 | /* malloc failed FIXME: Might want to do handle ENOMEM .. */ |
5b4a0ec0 | 995 | continue; |
48842b30 DG |
996 | } |
997 | ||
5b4a0ec0 | 998 | shadow_copy_channel(ua_chan, uchan); |
bec39940 | 999 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
48842b30 DG |
1000 | } |
1001 | } | |
1002 | ||
78f0bacd DG |
1003 | /* |
1004 | * Lookup sesison wrapper. | |
1005 | */ | |
84cd17c6 MD |
1006 | static |
1007 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
bec39940 | 1008 | struct ust_app *app, struct lttng_ht_iter *iter) |
84cd17c6 MD |
1009 | { |
1010 | /* Get right UST app session from app */ | |
2c348c10 | 1011 | lttng_ht_lookup(app->sessions, (void *)((unsigned long) usess->id), iter); |
84cd17c6 MD |
1012 | } |
1013 | ||
421cb601 DG |
1014 | /* |
1015 | * Return ust app session from the app session hashtable using the UST session | |
a991f516 | 1016 | * id. |
421cb601 | 1017 | */ |
48842b30 DG |
1018 | static struct ust_app_session *lookup_session_by_app( |
1019 | struct ltt_ust_session *usess, struct ust_app *app) | |
1020 | { | |
bec39940 DG |
1021 | struct lttng_ht_iter iter; |
1022 | struct lttng_ht_node_ulong *node; | |
48842b30 | 1023 | |
84cd17c6 | 1024 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 1025 | node = lttng_ht_iter_get_node_ulong(&iter); |
48842b30 DG |
1026 | if (node == NULL) { |
1027 | goto error; | |
1028 | } | |
1029 | ||
1030 | return caa_container_of(node, struct ust_app_session, node); | |
1031 | ||
1032 | error: | |
1033 | return NULL; | |
1034 | } | |
1035 | ||
421cb601 DG |
1036 | /* |
1037 | * Create a UST session onto the tracer of app and add it the session | |
1038 | * hashtable. | |
1039 | * | |
1040 | * Return ust app session or NULL on error. | |
1041 | */ | |
1042 | static struct ust_app_session *create_ust_app_session( | |
1043 | struct ltt_ust_session *usess, struct ust_app *app) | |
1044 | { | |
1045 | int ret; | |
1046 | struct ust_app_session *ua_sess; | |
1047 | ||
86acf0da DG |
1048 | health_code_update(&health_thread_cmd); |
1049 | ||
421cb601 DG |
1050 | ua_sess = lookup_session_by_app(usess, app); |
1051 | if (ua_sess == NULL) { | |
a991f516 | 1052 | DBG2("UST app pid: %d session id %d not found, creating it", |
852d0037 | 1053 | app->pid, usess->id); |
421cb601 DG |
1054 | ua_sess = alloc_ust_app_session(); |
1055 | if (ua_sess == NULL) { | |
1056 | /* Only malloc can failed so something is really wrong */ | |
fc34caaa | 1057 | goto end; |
421cb601 | 1058 | } |
477d7741 | 1059 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
1060 | } |
1061 | ||
86acf0da DG |
1062 | health_code_update(&health_thread_cmd); |
1063 | ||
421cb601 | 1064 | if (ua_sess->handle == -1) { |
852d0037 | 1065 | ret = ustctl_create_session(app->sock); |
421cb601 | 1066 | if (ret < 0) { |
852d0037 | 1067 | ERR("Creating session for app pid %d", app->pid); |
0f83395d | 1068 | delete_ust_app_session(-1, ua_sess); |
915d047c DG |
1069 | /* This means that the tracer is gone... */ |
1070 | ua_sess = (void*) -1UL; | |
0f83395d | 1071 | goto end; |
421cb601 DG |
1072 | } |
1073 | ||
421cb601 DG |
1074 | ua_sess->handle = ret; |
1075 | ||
1076 | /* Add ust app session to app's HT */ | |
2c348c10 | 1077 | lttng_ht_node_init_ulong(&ua_sess->node, (unsigned long) ua_sess->id); |
bec39940 | 1078 | lttng_ht_add_unique_ulong(app->sessions, &ua_sess->node); |
421cb601 DG |
1079 | |
1080 | DBG2("UST app session created successfully with handle %d", ret); | |
1081 | } | |
1082 | ||
fc34caaa | 1083 | end: |
86acf0da | 1084 | health_code_update(&health_thread_cmd); |
421cb601 | 1085 | return ua_sess; |
421cb601 DG |
1086 | } |
1087 | ||
55cc08a6 DG |
1088 | /* |
1089 | * Create a context for the channel on the tracer. | |
1090 | */ | |
1091 | static | |
1092 | int create_ust_app_channel_context(struct ust_app_session *ua_sess, | |
1093 | struct ust_app_channel *ua_chan, struct lttng_ust_context *uctx, | |
1094 | struct ust_app *app) | |
1095 | { | |
1096 | int ret = 0; | |
bec39940 DG |
1097 | struct lttng_ht_iter iter; |
1098 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
1099 | struct ust_app_ctx *ua_ctx; |
1100 | ||
1101 | DBG2("UST app adding context to channel %s", ua_chan->name); | |
1102 | ||
bec39940 DG |
1103 | lttng_ht_lookup(ua_chan->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
1104 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
1105 | if (node != NULL) { |
1106 | ret = -EEXIST; | |
1107 | goto error; | |
1108 | } | |
1109 | ||
1110 | ua_ctx = alloc_ust_app_ctx(uctx); | |
1111 | if (ua_ctx == NULL) { | |
1112 | /* malloc failed */ | |
1113 | ret = -1; | |
1114 | goto error; | |
1115 | } | |
1116 | ||
bec39940 DG |
1117 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
1118 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 DG |
1119 | |
1120 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
1121 | if (ret < 0) { | |
1122 | goto error; | |
1123 | } | |
1124 | ||
1125 | error: | |
1126 | return ret; | |
1127 | } | |
1128 | ||
edb67388 DG |
1129 | /* |
1130 | * Enable on the tracer side a ust app event for the session and channel. | |
1131 | */ | |
1132 | static | |
1133 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 1134 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
1135 | { |
1136 | int ret; | |
1137 | ||
1138 | ret = enable_ust_event(app, ua_sess, ua_event); | |
1139 | if (ret < 0) { | |
1140 | goto error; | |
1141 | } | |
1142 | ||
1143 | ua_event->enabled = 1; | |
1144 | ||
1145 | error: | |
1146 | return ret; | |
1147 | } | |
1148 | ||
9730260e DG |
1149 | /* |
1150 | * Disable on the tracer side a ust app event for the session and channel. | |
1151 | */ | |
1152 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
7f79d3a1 | 1153 | struct ust_app_event *ua_event, struct ust_app *app) |
9730260e DG |
1154 | { |
1155 | int ret; | |
1156 | ||
1157 | ret = disable_ust_event(app, ua_sess, ua_event); | |
1158 | if (ret < 0) { | |
1159 | goto error; | |
1160 | } | |
1161 | ||
1162 | ua_event->enabled = 0; | |
1163 | ||
1164 | error: | |
1165 | return ret; | |
1166 | } | |
1167 | ||
78f0bacd DG |
1168 | /* |
1169 | * Lookup ust app channel for session and disable it on the tracer side. | |
1170 | */ | |
8535a6d9 DG |
1171 | static |
1172 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
1173 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 1174 | { |
8535a6d9 | 1175 | int ret; |
78f0bacd DG |
1176 | |
1177 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
1178 | if (ret < 0) { | |
1179 | goto error; | |
1180 | } | |
1181 | ||
8535a6d9 DG |
1182 | ua_chan->enabled = 0; |
1183 | ||
78f0bacd DG |
1184 | error: |
1185 | return ret; | |
1186 | } | |
1187 | ||
1188 | /* | |
1189 | * Lookup ust app channel for session and enable it on the tracer side. | |
1190 | */ | |
1191 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
1192 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
1193 | { | |
1194 | int ret = 0; | |
bec39940 DG |
1195 | struct lttng_ht_iter iter; |
1196 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1197 | struct ust_app_channel *ua_chan; |
1198 | ||
bec39940 DG |
1199 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1200 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
78f0bacd | 1201 | if (ua_chan_node == NULL) { |
a991f516 MD |
1202 | DBG2("Unable to find channel %s in ust session id %u", |
1203 | uchan->name, ua_sess->id); | |
78f0bacd DG |
1204 | goto error; |
1205 | } | |
1206 | ||
1207 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1208 | ||
1209 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
1210 | if (ret < 0) { | |
1211 | goto error; | |
1212 | } | |
1213 | ||
1214 | error: | |
1215 | return ret; | |
1216 | } | |
1217 | ||
284d8f55 | 1218 | /* |
5b4a0ec0 | 1219 | * Create UST app channel and create it on the tracer. |
284d8f55 | 1220 | */ |
5b4a0ec0 DG |
1221 | static struct ust_app_channel *create_ust_app_channel( |
1222 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
1223 | struct ust_app *app) | |
1224 | { | |
1225 | int ret = 0; | |
bec39940 DG |
1226 | struct lttng_ht_iter iter; |
1227 | struct lttng_ht_node_str *ua_chan_node; | |
5b4a0ec0 DG |
1228 | struct ust_app_channel *ua_chan; |
1229 | ||
1230 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1231 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1232 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
fc34caaa | 1233 | if (ua_chan_node != NULL) { |
5b4a0ec0 | 1234 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
fc34caaa | 1235 | goto end; |
5b4a0ec0 DG |
1236 | } |
1237 | ||
fc34caaa DG |
1238 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); |
1239 | if (ua_chan == NULL) { | |
1240 | /* Only malloc can fail here */ | |
1241 | goto error; | |
1242 | } | |
1243 | shadow_copy_channel(ua_chan, uchan); | |
1244 | ||
5b4a0ec0 DG |
1245 | ret = create_ust_channel(app, ua_sess, ua_chan); |
1246 | if (ret < 0) { | |
fc34caaa | 1247 | /* Not found previously means that it does not exist on the tracer */ |
49c336c1 | 1248 | assert(ret != -LTTNG_UST_ERR_EXIST); |
5b4a0ec0 DG |
1249 | goto error; |
1250 | } | |
1251 | ||
58f3ca76 DG |
1252 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
1253 | ||
fc34caaa | 1254 | DBG2("UST app create channel %s for PID %d completed", ua_chan->name, |
852d0037 | 1255 | app->pid); |
fc34caaa DG |
1256 | |
1257 | end: | |
5b4a0ec0 DG |
1258 | return ua_chan; |
1259 | ||
1260 | error: | |
fc34caaa | 1261 | delete_ust_app_channel(-1, ua_chan); |
5b4a0ec0 DG |
1262 | return NULL; |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * Create UST app event and create it on the tracer side. | |
1267 | */ | |
edb67388 DG |
1268 | static |
1269 | int create_ust_app_event(struct ust_app_session *ua_sess, | |
1270 | struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent, | |
1271 | struct ust_app *app) | |
284d8f55 | 1272 | { |
edb67388 | 1273 | int ret = 0; |
5b4a0ec0 | 1274 | struct ust_app_event *ua_event; |
284d8f55 | 1275 | |
5b4a0ec0 | 1276 | /* Get event node */ |
18eace3b DG |
1277 | ua_event = find_ust_app_event(ua_chan->events, uevent->attr.name, |
1278 | uevent->filter, uevent->attr.loglevel); | |
1279 | if (ua_event != NULL) { | |
fc34caaa | 1280 | ret = -EEXIST; |
edb67388 DG |
1281 | goto end; |
1282 | } | |
5b4a0ec0 | 1283 | |
edb67388 DG |
1284 | /* Does not exist so create one */ |
1285 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
1286 | if (ua_event == NULL) { | |
1287 | /* Only malloc can failed so something is really wrong */ | |
1288 | ret = -ENOMEM; | |
fc34caaa | 1289 | goto end; |
5b4a0ec0 | 1290 | } |
edb67388 | 1291 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 1292 | |
edb67388 | 1293 | /* Create it on the tracer side */ |
5b4a0ec0 | 1294 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 1295 | if (ret < 0) { |
fc34caaa | 1296 | /* Not found previously means that it does not exist on the tracer */ |
76f66f63 | 1297 | assert(ret != -LTTNG_UST_ERR_EXIST); |
284d8f55 DG |
1298 | goto error; |
1299 | } | |
1300 | ||
18eace3b | 1301 | add_unique_ust_app_event(ua_chan->events, ua_event); |
284d8f55 | 1302 | |
fc34caaa | 1303 | DBG2("UST app create event %s for PID %d completed", ua_event->name, |
852d0037 | 1304 | app->pid); |
7f79d3a1 | 1305 | |
edb67388 | 1306 | end: |
fc34caaa DG |
1307 | return ret; |
1308 | ||
5b4a0ec0 | 1309 | error: |
fc34caaa DG |
1310 | /* Valid. Calling here is already in a read side lock */ |
1311 | delete_ust_app_event(-1, ua_event); | |
edb67388 | 1312 | return ret; |
5b4a0ec0 DG |
1313 | } |
1314 | ||
1315 | /* | |
1316 | * Create UST metadata and open it on the tracer side. | |
1317 | */ | |
1318 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
1319 | char *pathname, struct ust_app *app) | |
1320 | { | |
1321 | int ret = 0; | |
1322 | ||
1323 | if (ua_sess->metadata == NULL) { | |
1324 | /* Allocate UST metadata */ | |
1325 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
1326 | if (ua_sess->metadata == NULL) { | |
fc34caaa | 1327 | /* malloc() failed */ |
5b4a0ec0 DG |
1328 | goto error; |
1329 | } | |
1330 | ||
1331 | ret = open_ust_metadata(app, ua_sess); | |
1332 | if (ret < 0) { | |
7db205b5 DG |
1333 | DBG3("Opening metadata failed. Cleaning up memory"); |
1334 | ||
fc34caaa DG |
1335 | /* Cleanup failed metadata struct */ |
1336 | free(ua_sess->metadata); | |
7db205b5 DG |
1337 | /* |
1338 | * This is very important because delete_ust_app_session check if | |
1339 | * the pointer is null or not in order to delete the metadata. | |
1340 | */ | |
1341 | ua_sess->metadata = NULL; | |
5b4a0ec0 DG |
1342 | goto error; |
1343 | } | |
1344 | ||
852d0037 | 1345 | DBG2("UST metadata opened for app pid %d", app->pid); |
5b4a0ec0 DG |
1346 | } |
1347 | ||
1348 | /* Open UST metadata stream */ | |
1349 | if (ua_sess->metadata->stream_obj == NULL) { | |
1350 | ret = create_ust_stream(app, ua_sess); | |
1351 | if (ret < 0) { | |
1352 | goto error; | |
1353 | } | |
1354 | ||
477d7741 MD |
1355 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
1356 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
1357 | if (ret < 0) { |
1358 | PERROR("asprintf UST create stream"); | |
1359 | goto error; | |
1360 | } | |
1361 | ||
1362 | DBG2("UST metadata stream object created for app pid %d", | |
852d0037 | 1363 | app->pid); |
5b4a0ec0 DG |
1364 | } else { |
1365 | ERR("Attempting to create stream without metadata opened"); | |
1366 | goto error; | |
1367 | } | |
1368 | ||
1369 | return 0; | |
1370 | ||
1371 | error: | |
1372 | return -1; | |
1373 | } | |
1374 | ||
1375 | /* | |
1376 | * Return pointer to traceable apps list. | |
1377 | */ | |
bec39940 | 1378 | struct lttng_ht *ust_app_get_ht(void) |
5b4a0ec0 DG |
1379 | { |
1380 | return ust_app_ht; | |
1381 | } | |
1382 | ||
1383 | /* | |
1384 | * Return ust app pointer or NULL if not found. | |
1385 | */ | |
1386 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
1387 | { | |
bec39940 DG |
1388 | struct lttng_ht_node_ulong *node; |
1389 | struct lttng_ht_iter iter; | |
5b4a0ec0 DG |
1390 | |
1391 | rcu_read_lock(); | |
bec39940 DG |
1392 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) pid), &iter); |
1393 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1394 | if (node == NULL) { |
1395 | DBG2("UST app no found with pid %d", pid); | |
1396 | goto error; | |
1397 | } | |
1398 | rcu_read_unlock(); | |
1399 | ||
1400 | DBG2("Found UST app by pid %d", pid); | |
1401 | ||
852d0037 | 1402 | return caa_container_of(node, struct ust_app, pid_n); |
5b4a0ec0 DG |
1403 | |
1404 | error: | |
1405 | rcu_read_unlock(); | |
1406 | return NULL; | |
1407 | } | |
1408 | ||
1409 | /* | |
1410 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
1411 | * add it to the global traceable app list. | |
1412 | * | |
0df502fd MD |
1413 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
1414 | * bitness is not supported. | |
5b4a0ec0 DG |
1415 | */ |
1416 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
1417 | { | |
1418 | struct ust_app *lta; | |
799e2c4f | 1419 | int ret; |
5b4a0ec0 | 1420 | |
173af62f DG |
1421 | if ((msg->bits_per_long == 64 && |
1422 | (uatomic_read(&ust_consumerd64_fd) == -EINVAL)) | |
1423 | || (msg->bits_per_long == 32 && | |
1424 | (uatomic_read(&ust_consumerd32_fd) == -EINVAL))) { | |
f943b0fb | 1425 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1426 | "%d-bit long, but no consumerd for this long size is available.\n", |
1427 | msg->name, msg->pid, msg->bits_per_long); | |
799e2c4f MD |
1428 | ret = close(sock); |
1429 | if (ret) { | |
1430 | PERROR("close"); | |
1431 | } | |
4063050c | 1432 | lttng_fd_put(LTTNG_FD_APPS, 1); |
0df502fd MD |
1433 | return -EINVAL; |
1434 | } | |
3f2c5fcc MD |
1435 | if (msg->major != LTTNG_UST_COMM_MAJOR) { |
1436 | ERR("Registration failed: application \"%s\" (pid: %d) has " | |
1437 | "communication protocol version %u.%u, but sessiond supports 2.x.\n", | |
1438 | msg->name, msg->pid, msg->major, msg->minor); | |
799e2c4f MD |
1439 | ret = close(sock); |
1440 | if (ret) { | |
1441 | PERROR("close"); | |
1442 | } | |
4063050c | 1443 | lttng_fd_put(LTTNG_FD_APPS, 1); |
3f2c5fcc MD |
1444 | return -EINVAL; |
1445 | } | |
5b4a0ec0 DG |
1446 | lta = zmalloc(sizeof(struct ust_app)); |
1447 | if (lta == NULL) { | |
1448 | PERROR("malloc"); | |
1449 | return -ENOMEM; | |
1450 | } | |
1451 | ||
1452 | lta->ppid = msg->ppid; | |
1453 | lta->uid = msg->uid; | |
1454 | lta->gid = msg->gid; | |
e0c7ec2b | 1455 | lta->compatible = 0; /* Not compatible until proven */ |
7753dea8 | 1456 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1457 | lta->v_major = msg->major; |
1458 | lta->v_minor = msg->minor; | |
1459 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1460 | lta->name[16] = '\0'; | |
bec39940 | 1461 | lta->sessions = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
5b4a0ec0 | 1462 | |
852d0037 DG |
1463 | lta->pid = msg->pid; |
1464 | lttng_ht_node_init_ulong(<a->pid_n, (unsigned long)lta->pid); | |
1465 | lta->sock = sock; | |
1466 | lttng_ht_node_init_ulong(<a->sock_n, (unsigned long)lta->sock); | |
5b4a0ec0 DG |
1467 | |
1468 | rcu_read_lock(); | |
852d0037 DG |
1469 | |
1470 | /* | |
1471 | * On a re-registration, we want to kick out the previous registration of | |
1472 | * that pid | |
1473 | */ | |
1474 | lttng_ht_add_replace_ulong(ust_app_ht, <a->pid_n); | |
1475 | ||
1476 | /* | |
1477 | * The socket _should_ be unique until _we_ call close. So, a add_unique | |
1478 | * for the ust_app_ht_by_sock is used which asserts fail if the entry was | |
1479 | * already in the table. | |
1480 | */ | |
1481 | lttng_ht_add_unique_ulong(ust_app_ht_by_sock, <a->sock_n); | |
1482 | ||
5b4a0ec0 DG |
1483 | rcu_read_unlock(); |
1484 | ||
1485 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
852d0037 DG |
1486 | " (version %d.%d)", lta->pid, lta->ppid, lta->uid, lta->gid, |
1487 | lta->sock, lta->name, lta->v_major, lta->v_minor); | |
5b4a0ec0 DG |
1488 | |
1489 | return 0; | |
1490 | } | |
1491 | ||
1492 | /* | |
1493 | * Unregister app by removing it from the global traceable app list and freeing | |
1494 | * the data struct. | |
1495 | * | |
1496 | * The socket is already closed at this point so no close to sock. | |
1497 | */ | |
1498 | void ust_app_unregister(int sock) | |
1499 | { | |
1500 | struct ust_app *lta; | |
bec39940 DG |
1501 | struct lttng_ht_node_ulong *node; |
1502 | struct lttng_ht_iter iter; | |
525b0740 | 1503 | int ret; |
5b4a0ec0 DG |
1504 | |
1505 | rcu_read_lock(); | |
886459c6 | 1506 | |
5b4a0ec0 | 1507 | /* Get the node reference for a call_rcu */ |
852d0037 | 1508 | lttng_ht_lookup(ust_app_ht_by_sock, (void *)((unsigned long) sock), &iter); |
bec39940 | 1509 | node = lttng_ht_iter_get_node_ulong(&iter); |
5b4a0ec0 | 1510 | if (node == NULL) { |
852d0037 | 1511 | ERR("Unable to find app by sock %d", sock); |
5b4a0ec0 DG |
1512 | goto error; |
1513 | } | |
284d8f55 | 1514 | |
852d0037 DG |
1515 | lta = caa_container_of(node, struct ust_app, sock_n); |
1516 | ||
1517 | DBG("PID %d unregistering with sock %d", lta->pid, sock); | |
1518 | ||
886459c6 | 1519 | /* Remove application from PID hash table */ |
852d0037 DG |
1520 | ret = lttng_ht_del(ust_app_ht_by_sock, &iter); |
1521 | assert(!ret); | |
1522 | ||
1523 | /* Assign second node for deletion */ | |
1524 | iter.iter.node = <a->pid_n.node; | |
1525 | ||
5b98a774 DG |
1526 | /* |
1527 | * Ignore return value since the node might have been removed before by an | |
1528 | * add replace during app registration because the PID can be reassigned by | |
1529 | * the OS. | |
1530 | */ | |
bec39940 | 1531 | ret = lttng_ht_del(ust_app_ht, &iter); |
5b98a774 DG |
1532 | if (ret) { |
1533 | DBG3("Unregister app by PID %d failed. This can happen on pid reuse", | |
1534 | lta->pid); | |
1535 | } | |
852d0037 DG |
1536 | |
1537 | /* Free memory */ | |
1538 | call_rcu(<a->pid_n.head, delete_ust_app_rcu); | |
1539 | ||
284d8f55 | 1540 | error: |
5b4a0ec0 DG |
1541 | rcu_read_unlock(); |
1542 | return; | |
284d8f55 DG |
1543 | } |
1544 | ||
1545 | /* | |
5b4a0ec0 | 1546 | * Return traceable_app_count |
284d8f55 | 1547 | */ |
5b4a0ec0 | 1548 | unsigned long ust_app_list_count(void) |
284d8f55 | 1549 | { |
5b4a0ec0 | 1550 | unsigned long count; |
284d8f55 | 1551 | |
5b4a0ec0 | 1552 | rcu_read_lock(); |
bec39940 | 1553 | count = lttng_ht_get_count(ust_app_ht); |
5b4a0ec0 | 1554 | rcu_read_unlock(); |
284d8f55 | 1555 | |
5b4a0ec0 | 1556 | return count; |
284d8f55 DG |
1557 | } |
1558 | ||
5b4a0ec0 DG |
1559 | /* |
1560 | * Fill events array with all events name of all registered apps. | |
1561 | */ | |
1562 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1563 | { |
5b4a0ec0 DG |
1564 | int ret, handle; |
1565 | size_t nbmem, count = 0; | |
bec39940 | 1566 | struct lttng_ht_iter iter; |
5b4a0ec0 DG |
1567 | struct ust_app *app; |
1568 | struct lttng_event *tmp; | |
421cb601 | 1569 | |
5b4a0ec0 DG |
1570 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1571 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1572 | if (tmp == NULL) { | |
1573 | PERROR("zmalloc ust app events"); | |
1574 | ret = -ENOMEM; | |
421cb601 DG |
1575 | goto error; |
1576 | } | |
1577 | ||
5b4a0ec0 | 1578 | rcu_read_lock(); |
421cb601 | 1579 | |
852d0037 | 1580 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
90eaa0d2 | 1581 | struct lttng_ust_tracepoint_iter uiter; |
ac3bd9c0 | 1582 | |
86acf0da DG |
1583 | health_code_update(&health_thread_cmd); |
1584 | ||
e0c7ec2b DG |
1585 | if (!app->compatible) { |
1586 | /* | |
1587 | * TODO: In time, we should notice the caller of this error by | |
1588 | * telling him that this is a version error. | |
1589 | */ | |
1590 | continue; | |
1591 | } | |
852d0037 | 1592 | handle = ustctl_tracepoint_list(app->sock); |
5b4a0ec0 DG |
1593 | if (handle < 0) { |
1594 | ERR("UST app list events getting handle failed for app pid %d", | |
852d0037 | 1595 | app->pid); |
5b4a0ec0 DG |
1596 | continue; |
1597 | } | |
421cb601 | 1598 | |
852d0037 | 1599 | while ((ret = ustctl_tracepoint_list_get(app->sock, handle, |
fb54cdbf | 1600 | &uiter)) != -LTTNG_UST_ERR_NOENT) { |
86acf0da | 1601 | health_code_update(&health_thread_cmd); |
815564d8 | 1602 | if (count >= nbmem) { |
d7b3776f DG |
1603 | /* In case the realloc fails, we free the memory */ |
1604 | void *tmp_ptr = (void *) tmp; | |
815564d8 MD |
1605 | DBG2("Reallocating event list from %zu to %zu entries", nbmem, |
1606 | 2 * nbmem); | |
1607 | nbmem *= 2; | |
2f221590 | 1608 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event)); |
5b4a0ec0 DG |
1609 | if (tmp == NULL) { |
1610 | PERROR("realloc ust app events"); | |
d7b3776f | 1611 | free(tmp_ptr); |
5b4a0ec0 DG |
1612 | ret = -ENOMEM; |
1613 | goto rcu_error; | |
1614 | } | |
1615 | } | |
90eaa0d2 | 1616 | memcpy(tmp[count].name, uiter.name, LTTNG_UST_SYM_NAME_LEN); |
8005f29a | 1617 | tmp[count].loglevel = uiter.loglevel; |
6775595e | 1618 | tmp[count].type = (enum lttng_event_type) LTTNG_UST_TRACEPOINT; |
852d0037 | 1619 | tmp[count].pid = app->pid; |
5b4a0ec0 DG |
1620 | tmp[count].enabled = -1; |
1621 | count++; | |
421cb601 | 1622 | } |
421cb601 DG |
1623 | } |
1624 | ||
5b4a0ec0 DG |
1625 | ret = count; |
1626 | *events = tmp; | |
421cb601 | 1627 | |
5b4a0ec0 | 1628 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1629 | |
5b4a0ec0 DG |
1630 | rcu_error: |
1631 | rcu_read_unlock(); | |
421cb601 | 1632 | error: |
86acf0da | 1633 | health_code_update(&health_thread_cmd); |
5b4a0ec0 | 1634 | return ret; |
421cb601 DG |
1635 | } |
1636 | ||
f37d259d MD |
1637 | /* |
1638 | * Fill events array with all events name of all registered apps. | |
1639 | */ | |
1640 | int ust_app_list_event_fields(struct lttng_event_field **fields) | |
1641 | { | |
1642 | int ret, handle; | |
1643 | size_t nbmem, count = 0; | |
1644 | struct lttng_ht_iter iter; | |
1645 | struct ust_app *app; | |
1646 | struct lttng_event_field *tmp; | |
1647 | ||
1648 | nbmem = UST_APP_EVENT_LIST_SIZE; | |
1649 | tmp = zmalloc(nbmem * sizeof(struct lttng_event_field)); | |
1650 | if (tmp == NULL) { | |
1651 | PERROR("zmalloc ust app event fields"); | |
1652 | ret = -ENOMEM; | |
1653 | goto error; | |
1654 | } | |
1655 | ||
1656 | rcu_read_lock(); | |
1657 | ||
1658 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { | |
1659 | struct lttng_ust_field_iter uiter; | |
1660 | ||
86acf0da DG |
1661 | health_code_update(&health_thread_cmd); |
1662 | ||
f37d259d MD |
1663 | if (!app->compatible) { |
1664 | /* | |
1665 | * TODO: In time, we should notice the caller of this error by | |
1666 | * telling him that this is a version error. | |
1667 | */ | |
1668 | continue; | |
1669 | } | |
1670 | handle = ustctl_tracepoint_field_list(app->sock); | |
1671 | if (handle < 0) { | |
1672 | ERR("UST app list event fields getting handle failed for app pid %d", | |
1673 | app->pid); | |
1674 | continue; | |
1675 | } | |
1676 | ||
1677 | while ((ret = ustctl_tracepoint_field_list_get(app->sock, handle, | |
fb54cdbf | 1678 | &uiter)) != -LTTNG_UST_ERR_NOENT) { |
86acf0da | 1679 | health_code_update(&health_thread_cmd); |
f37d259d | 1680 | if (count >= nbmem) { |
d7b3776f DG |
1681 | /* In case the realloc fails, we free the memory */ |
1682 | void *tmp_ptr = (void *) tmp; | |
f37d259d MD |
1683 | DBG2("Reallocating event field list from %zu to %zu entries", nbmem, |
1684 | 2 * nbmem); | |
1685 | nbmem *= 2; | |
1686 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event_field)); | |
1687 | if (tmp == NULL) { | |
1688 | PERROR("realloc ust app event fields"); | |
d7b3776f | 1689 | free(tmp_ptr); |
f37d259d MD |
1690 | ret = -ENOMEM; |
1691 | goto rcu_error; | |
1692 | } | |
1693 | } | |
f37d259d MD |
1694 | |
1695 | memcpy(tmp[count].field_name, uiter.field_name, LTTNG_UST_SYM_NAME_LEN); | |
1696 | tmp[count].type = uiter.type; | |
590b9e3c | 1697 | tmp[count].nowrite = uiter.nowrite; |
f37d259d MD |
1698 | |
1699 | memcpy(tmp[count].event.name, uiter.event_name, LTTNG_UST_SYM_NAME_LEN); | |
1700 | tmp[count].event.loglevel = uiter.loglevel; | |
1701 | tmp[count].event.type = LTTNG_UST_TRACEPOINT; | |
1702 | tmp[count].event.pid = app->pid; | |
1703 | tmp[count].event.enabled = -1; | |
1704 | count++; | |
1705 | } | |
1706 | } | |
1707 | ||
1708 | ret = count; | |
1709 | *fields = tmp; | |
1710 | ||
1711 | DBG2("UST app list event fields done (%zu events)", count); | |
1712 | ||
1713 | rcu_error: | |
1714 | rcu_read_unlock(); | |
1715 | error: | |
86acf0da | 1716 | health_code_update(&health_thread_cmd); |
f37d259d MD |
1717 | return ret; |
1718 | } | |
1719 | ||
5b4a0ec0 DG |
1720 | /* |
1721 | * Free and clean all traceable apps of the global list. | |
1722 | */ | |
1723 | void ust_app_clean_list(void) | |
421cb601 | 1724 | { |
5b4a0ec0 | 1725 | int ret; |
659ed79f | 1726 | struct ust_app *app; |
bec39940 | 1727 | struct lttng_ht_iter iter; |
421cb601 | 1728 | |
5b4a0ec0 | 1729 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1730 | |
5b4a0ec0 | 1731 | rcu_read_lock(); |
421cb601 | 1732 | |
659ed79f | 1733 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
bec39940 | 1734 | ret = lttng_ht_del(ust_app_ht, &iter); |
525b0740 | 1735 | assert(!ret); |
659ed79f | 1736 | call_rcu(&app->pid_n.head, delete_ust_app_rcu); |
421cb601 DG |
1737 | } |
1738 | ||
852d0037 | 1739 | /* Cleanup socket hash table */ |
659ed79f DG |
1740 | cds_lfht_for_each_entry(ust_app_ht_by_sock->ht, &iter.iter, app, |
1741 | sock_n.node) { | |
852d0037 | 1742 | ret = lttng_ht_del(ust_app_ht_by_sock, &iter); |
bec39940 DG |
1743 | assert(!ret); |
1744 | } | |
852d0037 | 1745 | |
bec39940 | 1746 | /* Destroy is done only when the ht is empty */ |
852d0037 DG |
1747 | lttng_ht_destroy(ust_app_ht); |
1748 | lttng_ht_destroy(ust_app_ht_by_sock); | |
421cb601 | 1749 | |
5b4a0ec0 DG |
1750 | rcu_read_unlock(); |
1751 | } | |
1752 | ||
1753 | /* | |
1754 | * Init UST app hash table. | |
1755 | */ | |
1756 | void ust_app_ht_alloc(void) | |
1757 | { | |
bec39940 | 1758 | ust_app_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
852d0037 | 1759 | ust_app_ht_by_sock = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
421cb601 DG |
1760 | } |
1761 | ||
78f0bacd DG |
1762 | /* |
1763 | * For a specific UST session, disable the channel for all registered apps. | |
1764 | */ | |
35a9059d | 1765 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1766 | struct ltt_ust_channel *uchan) |
1767 | { | |
1768 | int ret = 0; | |
bec39940 DG |
1769 | struct lttng_ht_iter iter; |
1770 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1771 | struct ust_app *app; |
1772 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1773 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1774 | |
1775 | if (usess == NULL || uchan == NULL) { | |
1776 | ERR("Disabling UST global channel with NULL values"); | |
1777 | ret = -1; | |
1778 | goto error; | |
1779 | } | |
1780 | ||
a991f516 MD |
1781 | DBG2("UST app disabling channel %s from global domain for session id %d", |
1782 | uchan->name, usess->id); | |
78f0bacd DG |
1783 | |
1784 | rcu_read_lock(); | |
1785 | ||
1786 | /* For every registered applications */ | |
852d0037 | 1787 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
bec39940 | 1788 | struct lttng_ht_iter uiter; |
e0c7ec2b DG |
1789 | if (!app->compatible) { |
1790 | /* | |
1791 | * TODO: In time, we should notice the caller of this error by | |
1792 | * telling him that this is a version error. | |
1793 | */ | |
1794 | continue; | |
1795 | } | |
78f0bacd DG |
1796 | ua_sess = lookup_session_by_app(usess, app); |
1797 | if (ua_sess == NULL) { | |
1798 | continue; | |
1799 | } | |
1800 | ||
8535a6d9 | 1801 | /* Get channel */ |
bec39940 DG |
1802 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1803 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
8535a6d9 DG |
1804 | /* If the session if found for the app, the channel must be there */ |
1805 | assert(ua_chan_node); | |
1806 | ||
1807 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1808 | /* The channel must not be already disabled */ | |
1809 | assert(ua_chan->enabled == 1); | |
1810 | ||
1811 | /* Disable channel onto application */ | |
1812 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1813 | if (ret < 0) { |
1814 | /* XXX: We might want to report this error at some point... */ | |
1815 | continue; | |
1816 | } | |
1817 | } | |
1818 | ||
1819 | rcu_read_unlock(); | |
1820 | ||
1821 | error: | |
1822 | return ret; | |
1823 | } | |
1824 | ||
1825 | /* | |
1826 | * For a specific UST session, enable the channel for all registered apps. | |
1827 | */ | |
35a9059d | 1828 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1829 | struct ltt_ust_channel *uchan) |
1830 | { | |
1831 | int ret = 0; | |
bec39940 | 1832 | struct lttng_ht_iter iter; |
78f0bacd DG |
1833 | struct ust_app *app; |
1834 | struct ust_app_session *ua_sess; | |
1835 | ||
1836 | if (usess == NULL || uchan == NULL) { | |
1837 | ERR("Adding UST global channel to NULL values"); | |
1838 | ret = -1; | |
1839 | goto error; | |
1840 | } | |
1841 | ||
a991f516 MD |
1842 | DBG2("UST app enabling channel %s to global domain for session id %d", |
1843 | uchan->name, usess->id); | |
78f0bacd DG |
1844 | |
1845 | rcu_read_lock(); | |
1846 | ||
1847 | /* For every registered applications */ | |
852d0037 | 1848 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1849 | if (!app->compatible) { |
1850 | /* | |
1851 | * TODO: In time, we should notice the caller of this error by | |
1852 | * telling him that this is a version error. | |
1853 | */ | |
1854 | continue; | |
1855 | } | |
78f0bacd DG |
1856 | ua_sess = lookup_session_by_app(usess, app); |
1857 | if (ua_sess == NULL) { | |
1858 | continue; | |
1859 | } | |
1860 | ||
1861 | /* Enable channel onto application */ | |
1862 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1863 | if (ret < 0) { | |
1864 | /* XXX: We might want to report this error at some point... */ | |
1865 | continue; | |
1866 | } | |
1867 | } | |
1868 | ||
1869 | rcu_read_unlock(); | |
1870 | ||
1871 | error: | |
1872 | return ret; | |
1873 | } | |
1874 | ||
b0a40d28 DG |
1875 | /* |
1876 | * Disable an event in a channel and for a specific session. | |
1877 | */ | |
35a9059d DG |
1878 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
1879 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
1880 | { |
1881 | int ret = 0; | |
bec39940 DG |
1882 | struct lttng_ht_iter iter, uiter; |
1883 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
b0a40d28 DG |
1884 | struct ust_app *app; |
1885 | struct ust_app_session *ua_sess; | |
1886 | struct ust_app_channel *ua_chan; | |
1887 | struct ust_app_event *ua_event; | |
1888 | ||
1889 | DBG("UST app disabling event %s for all apps in channel " | |
a991f516 | 1890 | "%s for session id %d", uevent->attr.name, uchan->name, usess->id); |
b0a40d28 DG |
1891 | |
1892 | rcu_read_lock(); | |
1893 | ||
1894 | /* For all registered applications */ | |
852d0037 | 1895 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1896 | if (!app->compatible) { |
1897 | /* | |
1898 | * TODO: In time, we should notice the caller of this error by | |
1899 | * telling him that this is a version error. | |
1900 | */ | |
1901 | continue; | |
1902 | } | |
b0a40d28 DG |
1903 | ua_sess = lookup_session_by_app(usess, app); |
1904 | if (ua_sess == NULL) { | |
1905 | /* Next app */ | |
1906 | continue; | |
1907 | } | |
1908 | ||
1909 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1910 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1911 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 | 1912 | if (ua_chan_node == NULL) { |
a991f516 | 1913 | DBG2("Channel %s not found in session id %d for app pid %d." |
852d0037 | 1914 | "Skipping", uchan->name, usess->id, app->pid); |
b0a40d28 DG |
1915 | continue; |
1916 | } | |
1917 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1918 | ||
bec39940 DG |
1919 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
1920 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 DG |
1921 | if (ua_event_node == NULL) { |
1922 | DBG2("Event %s not found in channel %s for app pid %d." | |
852d0037 | 1923 | "Skipping", uevent->attr.name, uchan->name, app->pid); |
b0a40d28 DG |
1924 | continue; |
1925 | } | |
1926 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1927 | ||
7f79d3a1 | 1928 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
b0a40d28 DG |
1929 | if (ret < 0) { |
1930 | /* XXX: Report error someday... */ | |
1931 | continue; | |
1932 | } | |
1933 | } | |
1934 | ||
1935 | rcu_read_unlock(); | |
1936 | ||
1937 | return ret; | |
1938 | } | |
1939 | ||
9730260e | 1940 | /* |
edb67388 | 1941 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
1942 | * registered apps. |
1943 | */ | |
35a9059d | 1944 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
1945 | struct ltt_ust_channel *uchan) |
1946 | { | |
1947 | int ret = 0; | |
bec39940 DG |
1948 | struct lttng_ht_iter iter, uiter; |
1949 | struct lttng_ht_node_str *ua_chan_node; | |
9730260e DG |
1950 | struct ust_app *app; |
1951 | struct ust_app_session *ua_sess; | |
1952 | struct ust_app_channel *ua_chan; | |
1953 | struct ust_app_event *ua_event; | |
1954 | ||
1955 | DBG("UST app disabling all event for all apps in channel " | |
a991f516 | 1956 | "%s for session id %d", uchan->name, usess->id); |
9730260e DG |
1957 | |
1958 | rcu_read_lock(); | |
1959 | ||
1960 | /* For all registered applications */ | |
852d0037 | 1961 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1962 | if (!app->compatible) { |
1963 | /* | |
1964 | * TODO: In time, we should notice the caller of this error by | |
1965 | * telling him that this is a version error. | |
1966 | */ | |
1967 | continue; | |
1968 | } | |
9730260e | 1969 | ua_sess = lookup_session_by_app(usess, app); |
c4a1715b DG |
1970 | if (!ua_sess) { |
1971 | /* The application has problem or is probably dead. */ | |
1972 | continue; | |
1973 | } | |
9730260e DG |
1974 | |
1975 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1976 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1977 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
1978 | /* If the channel is not found, there is a code flow error */ |
1979 | assert(ua_chan_node); | |
1980 | ||
9730260e DG |
1981 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1982 | ||
1983 | /* Disable each events of channel */ | |
bec39940 DG |
1984 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
1985 | node.node) { | |
7f79d3a1 | 1986 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
9730260e DG |
1987 | if (ret < 0) { |
1988 | /* XXX: Report error someday... */ | |
1989 | continue; | |
1990 | } | |
1991 | } | |
1992 | } | |
1993 | ||
1994 | rcu_read_unlock(); | |
1995 | ||
1996 | return ret; | |
1997 | } | |
1998 | ||
421cb601 | 1999 | /* |
5b4a0ec0 | 2000 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 2001 | */ |
35a9059d | 2002 | int ust_app_create_channel_glb(struct ltt_ust_session *usess, |
48842b30 DG |
2003 | struct ltt_ust_channel *uchan) |
2004 | { | |
3c14c33f | 2005 | int ret = 0; |
bec39940 | 2006 | struct lttng_ht_iter iter; |
48842b30 DG |
2007 | struct ust_app *app; |
2008 | struct ust_app_session *ua_sess; | |
2009 | struct ust_app_channel *ua_chan; | |
2010 | ||
fc34caaa DG |
2011 | /* Very wrong code flow */ |
2012 | assert(usess); | |
2013 | assert(uchan); | |
421cb601 | 2014 | |
a991f516 MD |
2015 | DBG2("UST app adding channel %s to global domain for session id %d", |
2016 | uchan->name, usess->id); | |
48842b30 DG |
2017 | |
2018 | rcu_read_lock(); | |
421cb601 | 2019 | |
5b4a0ec0 | 2020 | /* For every registered applications */ |
852d0037 | 2021 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2022 | if (!app->compatible) { |
2023 | /* | |
2024 | * TODO: In time, we should notice the caller of this error by | |
2025 | * telling him that this is a version error. | |
2026 | */ | |
2027 | continue; | |
2028 | } | |
edb67388 DG |
2029 | /* |
2030 | * Create session on the tracer side and add it to app session HT. Note | |
2031 | * that if session exist, it will simply return a pointer to the ust | |
2032 | * app session. | |
2033 | */ | |
421cb601 | 2034 | ua_sess = create_ust_app_session(usess, app); |
509cbaf8 | 2035 | if (ua_sess == NULL) { |
915d047c | 2036 | /* The malloc() failed. */ |
3c14c33f | 2037 | ret = -1; |
fc34caaa | 2038 | goto error; |
915d047c DG |
2039 | } else if (ua_sess == (void *) -1UL) { |
2040 | /* The application's socket is not valid. Contiuing */ | |
3c14c33f | 2041 | ret = -1; |
915d047c | 2042 | continue; |
48842b30 DG |
2043 | } |
2044 | ||
421cb601 DG |
2045 | /* Create channel onto application */ |
2046 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
2047 | if (ua_chan == NULL) { | |
fc34caaa | 2048 | /* Major problem here and it's maybe the tracer or malloc() */ |
3c14c33f | 2049 | ret = -1; |
fc34caaa | 2050 | goto error; |
48842b30 | 2051 | } |
48842b30 | 2052 | } |
5b4a0ec0 | 2053 | |
48842b30 DG |
2054 | rcu_read_unlock(); |
2055 | ||
421cb601 | 2056 | error: |
3c14c33f | 2057 | return ret; |
48842b30 DG |
2058 | } |
2059 | ||
5b4a0ec0 | 2060 | /* |
edb67388 | 2061 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 2062 | */ |
35a9059d | 2063 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
2064 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
2065 | { | |
2066 | int ret = 0; | |
bec39940 | 2067 | struct lttng_ht_iter iter, uiter; |
18eace3b | 2068 | struct lttng_ht_node_str *ua_chan_node; |
48842b30 DG |
2069 | struct ust_app *app; |
2070 | struct ust_app_session *ua_sess; | |
2071 | struct ust_app_channel *ua_chan; | |
2072 | struct ust_app_event *ua_event; | |
48842b30 | 2073 | |
a991f516 MD |
2074 | DBG("UST app enabling event %s for all apps for session id %d", |
2075 | uevent->attr.name, usess->id); | |
48842b30 | 2076 | |
edb67388 DG |
2077 | /* |
2078 | * NOTE: At this point, this function is called only if the session and | |
2079 | * channel passed are already created for all apps. and enabled on the | |
2080 | * tracer also. | |
2081 | */ | |
2082 | ||
48842b30 | 2083 | rcu_read_lock(); |
421cb601 DG |
2084 | |
2085 | /* For all registered applications */ | |
852d0037 | 2086 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2087 | if (!app->compatible) { |
2088 | /* | |
2089 | * TODO: In time, we should notice the caller of this error by | |
2090 | * telling him that this is a version error. | |
2091 | */ | |
2092 | continue; | |
2093 | } | |
edb67388 | 2094 | ua_sess = lookup_session_by_app(usess, app); |
c4a1715b DG |
2095 | if (!ua_sess) { |
2096 | /* The application has problem or is probably dead. */ | |
2097 | continue; | |
2098 | } | |
ba767faf | 2099 | |
edb67388 | 2100 | /* Lookup channel in the ust app session */ |
bec39940 DG |
2101 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2102 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
2103 | /* If the channel is not found, there is a code flow error */ |
2104 | assert(ua_chan_node); | |
2105 | ||
2106 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2107 | ||
18eace3b DG |
2108 | /* Get event node */ |
2109 | ua_event = find_ust_app_event(ua_chan->events, uevent->attr.name, | |
2110 | uevent->filter, uevent->attr.loglevel); | |
2111 | if (ua_event == NULL) { | |
7f79d3a1 | 2112 | DBG3("UST app enable event %s not found for app PID %d." |
852d0037 | 2113 | "Skipping app", uevent->attr.name, app->pid); |
35a9059d DG |
2114 | continue; |
2115 | } | |
35a9059d DG |
2116 | |
2117 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2118 | if (ret < 0) { | |
7f79d3a1 | 2119 | goto error; |
48842b30 | 2120 | } |
edb67388 DG |
2121 | } |
2122 | ||
7f79d3a1 | 2123 | error: |
edb67388 | 2124 | rcu_read_unlock(); |
edb67388 DG |
2125 | return ret; |
2126 | } | |
2127 | ||
2128 | /* | |
2129 | * For a specific existing UST session and UST channel, creates the event for | |
2130 | * all registered apps. | |
2131 | */ | |
35a9059d | 2132 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
2133 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
2134 | { | |
2135 | int ret = 0; | |
bec39940 DG |
2136 | struct lttng_ht_iter iter, uiter; |
2137 | struct lttng_ht_node_str *ua_chan_node; | |
edb67388 DG |
2138 | struct ust_app *app; |
2139 | struct ust_app_session *ua_sess; | |
2140 | struct ust_app_channel *ua_chan; | |
2141 | ||
a991f516 MD |
2142 | DBG("UST app creating event %s for all apps for session id %d", |
2143 | uevent->attr.name, usess->id); | |
edb67388 | 2144 | |
edb67388 DG |
2145 | rcu_read_lock(); |
2146 | ||
2147 | /* For all registered applications */ | |
852d0037 | 2148 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2149 | if (!app->compatible) { |
2150 | /* | |
2151 | * TODO: In time, we should notice the caller of this error by | |
2152 | * telling him that this is a version error. | |
2153 | */ | |
2154 | continue; | |
2155 | } | |
edb67388 | 2156 | ua_sess = lookup_session_by_app(usess, app); |
c4a1715b DG |
2157 | if (!ua_sess) { |
2158 | /* The application has problem or is probably dead. */ | |
2159 | continue; | |
2160 | } | |
48842b30 DG |
2161 | |
2162 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2163 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2164 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
2165 | /* If the channel is not found, there is a code flow error */ |
2166 | assert(ua_chan_node); | |
2167 | ||
48842b30 DG |
2168 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
2169 | ||
edb67388 DG |
2170 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
2171 | if (ret < 0) { | |
49c336c1 | 2172 | if (ret != -LTTNG_UST_ERR_EXIST) { |
fc34caaa DG |
2173 | /* Possible value at this point: -ENOMEM. If so, we stop! */ |
2174 | break; | |
2175 | } | |
2176 | DBG2("UST app event %s already exist on app PID %d", | |
852d0037 | 2177 | uevent->attr.name, app->pid); |
5b4a0ec0 | 2178 | continue; |
48842b30 | 2179 | } |
48842b30 | 2180 | } |
5b4a0ec0 | 2181 | |
48842b30 DG |
2182 | rcu_read_unlock(); |
2183 | ||
2184 | return ret; | |
2185 | } | |
2186 | ||
5b4a0ec0 DG |
2187 | /* |
2188 | * Start tracing for a specific UST session and app. | |
2189 | */ | |
421cb601 | 2190 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
2191 | { |
2192 | int ret = 0; | |
bec39940 | 2193 | struct lttng_ht_iter iter; |
48842b30 DG |
2194 | struct ust_app_session *ua_sess; |
2195 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 2196 | struct ltt_ust_stream *ustream; |
173af62f | 2197 | struct consumer_socket *socket; |
48842b30 | 2198 | |
852d0037 | 2199 | DBG("Starting tracing for ust app pid %d", app->pid); |
5cf5d0e7 | 2200 | |
509cbaf8 MD |
2201 | rcu_read_lock(); |
2202 | ||
e0c7ec2b DG |
2203 | if (!app->compatible) { |
2204 | goto end; | |
2205 | } | |
2206 | ||
421cb601 DG |
2207 | ua_sess = lookup_session_by_app(usess, app); |
2208 | if (ua_sess == NULL) { | |
509cbaf8 | 2209 | goto error_rcu_unlock; |
421cb601 | 2210 | } |
48842b30 | 2211 | |
aea829b3 DG |
2212 | /* Upon restart, we skip the setup, already done */ |
2213 | if (ua_sess->started) { | |
8be98f9a | 2214 | goto skip_setup; |
aea829b3 | 2215 | } |
8be98f9a | 2216 | |
a4b92340 DG |
2217 | /* Create directories if consumer is LOCAL and has a path defined. */ |
2218 | if (usess->consumer->type == CONSUMER_DST_LOCAL && | |
2219 | strlen(usess->consumer->dst.trace_path) > 0) { | |
2220 | ret = run_as_mkdir_recursive(usess->consumer->dst.trace_path, | |
2221 | S_IRWXU | S_IRWXG, usess->uid, usess->gid); | |
2222 | if (ret < 0) { | |
2223 | if (ret != -EEXIST) { | |
2224 | ERR("Trace directory creation error"); | |
2225 | ret = -1; | |
2226 | goto error_rcu_unlock; | |
2227 | } | |
2228 | } | |
2229 | } | |
2230 | ||
f848c3eb DG |
2231 | /* Indicate that the session has been started once */ |
2232 | ua_sess->started = 1; | |
2233 | ||
421cb601 DG |
2234 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
2235 | if (ret < 0) { | |
f73fabfd | 2236 | ret = LTTNG_ERR_UST_META_FAIL; |
509cbaf8 | 2237 | goto error_rcu_unlock; |
421cb601 | 2238 | } |
48842b30 | 2239 | |
421cb601 | 2240 | /* For each channel */ |
bec39940 DG |
2241 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2242 | node.node) { | |
421cb601 DG |
2243 | /* Create all streams */ |
2244 | while (1) { | |
5b4a0ec0 | 2245 | /* Create UST stream */ |
421cb601 DG |
2246 | ustream = zmalloc(sizeof(*ustream)); |
2247 | if (ustream == NULL) { | |
2248 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 2249 | goto error_rcu_unlock; |
421cb601 | 2250 | } |
48842b30 | 2251 | |
4063050c MD |
2252 | /* We are going to receive 2 fds, we need to reserve them. */ |
2253 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
2254 | if (ret < 0) { | |
2255 | ERR("Exhausted number of available FD upon stream create"); | |
2256 | free(ustream); | |
2257 | goto error_rcu_unlock; | |
2258 | } | |
86acf0da DG |
2259 | |
2260 | health_code_update(&health_thread_cmd); | |
2261 | ||
852d0037 | 2262 | ret = ustctl_create_stream(app->sock, ua_chan->obj, |
421cb601 | 2263 | &ustream->obj); |
48842b30 | 2264 | if (ret < 0) { |
421cb601 | 2265 | /* Got all streams */ |
4063050c | 2266 | lttng_fd_put(LTTNG_FD_APPS, 2); |
a2c0da86 | 2267 | free(ustream); |
f73fabfd | 2268 | ret = LTTNG_ERR_UST_STREAM_FAIL; |
421cb601 | 2269 | break; |
48842b30 | 2270 | } |
421cb601 | 2271 | ustream->handle = ustream->obj->handle; |
48842b30 | 2272 | |
86acf0da DG |
2273 | health_code_update(&health_thread_cmd); |
2274 | ||
421cb601 DG |
2275 | /* Order is important */ |
2276 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
00e2e675 | 2277 | ret = snprintf(ustream->name, sizeof(ustream->name), "%s_%u", |
c30aaa51 MD |
2278 | ua_chan->name, ua_chan->streams.count); |
2279 | ua_chan->streams.count++; | |
aba8e916 DG |
2280 | if (ret < 0) { |
2281 | PERROR("asprintf UST create stream"); | |
a2c0da86 MD |
2282 | /* |
2283 | * XXX what should we do here with the | |
2284 | * stream ? | |
2285 | */ | |
421cb601 | 2286 | continue; |
aba8e916 | 2287 | } |
00e2e675 DG |
2288 | DBG2("UST stream %d ready (handle: %d)", ua_chan->streams.count, |
2289 | ustream->handle); | |
421cb601 | 2290 | } |
86acf0da DG |
2291 | |
2292 | health_code_update(&health_thread_cmd); | |
421cb601 | 2293 | } |
aba8e916 | 2294 | |
7753dea8 MD |
2295 | switch (app->bits_per_long) { |
2296 | case 64: | |
173af62f DG |
2297 | socket = consumer_find_socket(uatomic_read(&ust_consumerd64_fd), |
2298 | usess->consumer); | |
2299 | if (socket == NULL) { | |
2300 | goto skip_setup; | |
2301 | } | |
7753dea8 MD |
2302 | break; |
2303 | case 32: | |
173af62f DG |
2304 | socket = consumer_find_socket(uatomic_read(&ust_consumerd32_fd), |
2305 | usess->consumer); | |
2306 | if (socket == NULL) { | |
2307 | goto skip_setup; | |
2308 | } | |
7753dea8 MD |
2309 | break; |
2310 | default: | |
2311 | ret = -EINVAL; | |
2312 | goto error_rcu_unlock; | |
2313 | } | |
aea829b3 | 2314 | |
421cb601 | 2315 | /* Setup UST consumer socket and send fds to it */ |
173af62f | 2316 | ret = ust_consumer_send_session(ua_sess, usess->consumer, socket); |
421cb601 | 2317 | if (ret < 0) { |
509cbaf8 | 2318 | goto error_rcu_unlock; |
421cb601 | 2319 | } |
48842b30 | 2320 | |
86acf0da DG |
2321 | health_code_update(&health_thread_cmd); |
2322 | ||
8be98f9a | 2323 | skip_setup: |
421cb601 | 2324 | /* This start the UST tracing */ |
852d0037 | 2325 | ret = ustctl_start_session(app->sock, ua_sess->handle); |
421cb601 | 2326 | if (ret < 0) { |
852d0037 | 2327 | ERR("Error starting tracing for app pid: %d", app->pid); |
509cbaf8 | 2328 | goto error_rcu_unlock; |
421cb601 | 2329 | } |
5b4a0ec0 | 2330 | |
86acf0da DG |
2331 | health_code_update(&health_thread_cmd); |
2332 | ||
421cb601 | 2333 | /* Quiescent wait after starting trace */ |
852d0037 | 2334 | ustctl_wait_quiescent(app->sock); |
48842b30 | 2335 | |
e0c7ec2b DG |
2336 | end: |
2337 | rcu_read_unlock(); | |
86acf0da | 2338 | health_code_update(&health_thread_cmd); |
421cb601 | 2339 | return 0; |
48842b30 | 2340 | |
509cbaf8 MD |
2341 | error_rcu_unlock: |
2342 | rcu_read_unlock(); | |
86acf0da | 2343 | health_code_update(&health_thread_cmd); |
421cb601 DG |
2344 | return -1; |
2345 | } | |
48842b30 | 2346 | |
8be98f9a MD |
2347 | /* |
2348 | * Stop tracing for a specific UST session and app. | |
2349 | */ | |
2350 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2351 | { | |
2352 | int ret = 0; | |
bec39940 | 2353 | struct lttng_ht_iter iter; |
8be98f9a | 2354 | struct ust_app_session *ua_sess; |
6d3686da | 2355 | struct ust_app_channel *ua_chan; |
8be98f9a | 2356 | |
852d0037 | 2357 | DBG("Stopping tracing for ust app pid %d", app->pid); |
8be98f9a MD |
2358 | |
2359 | rcu_read_lock(); | |
2360 | ||
e0c7ec2b DG |
2361 | if (!app->compatible) { |
2362 | goto end; | |
2363 | } | |
2364 | ||
8be98f9a MD |
2365 | ua_sess = lookup_session_by_app(usess, app); |
2366 | if (ua_sess == NULL) { | |
2367 | /* Only malloc can failed so something is really wrong */ | |
2368 | goto error_rcu_unlock; | |
2369 | } | |
2370 | ||
9bc07046 DG |
2371 | /* |
2372 | * If started = 0, it means that stop trace has been called for a session | |
2373 | * that was never started. This is a code flow error and should never | |
2374 | * happen. | |
2375 | */ | |
2376 | assert(ua_sess->started == 1); | |
7db205b5 | 2377 | |
86acf0da DG |
2378 | health_code_update(&health_thread_cmd); |
2379 | ||
9d6c7d3f | 2380 | /* This inhibits UST tracing */ |
852d0037 | 2381 | ret = ustctl_stop_session(app->sock, ua_sess->handle); |
9d6c7d3f | 2382 | if (ret < 0) { |
852d0037 | 2383 | ERR("Error stopping tracing for app pid: %d", app->pid); |
9d6c7d3f DG |
2384 | goto error_rcu_unlock; |
2385 | } | |
2386 | ||
86acf0da DG |
2387 | health_code_update(&health_thread_cmd); |
2388 | ||
9d6c7d3f | 2389 | /* Quiescent wait after stopping trace */ |
852d0037 | 2390 | ustctl_wait_quiescent(app->sock); |
9d6c7d3f | 2391 | |
86acf0da DG |
2392 | health_code_update(&health_thread_cmd); |
2393 | ||
9d6c7d3f | 2394 | /* Flushing buffers */ |
bec39940 DG |
2395 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2396 | node.node) { | |
86acf0da | 2397 | health_code_update(&health_thread_cmd); |
852d0037 | 2398 | ret = ustctl_sock_flush_buffer(app->sock, ua_chan->obj); |
8be98f9a | 2399 | if (ret < 0) { |
7db205b5 | 2400 | ERR("UST app PID %d channel %s flush failed with ret %d", |
852d0037 | 2401 | app->pid, ua_chan->name, ret); |
6d3686da DG |
2402 | /* Continuing flushing all buffers */ |
2403 | continue; | |
8be98f9a MD |
2404 | } |
2405 | } | |
8be98f9a | 2406 | |
86acf0da DG |
2407 | health_code_update(&health_thread_cmd); |
2408 | ||
90d97d10 | 2409 | /* Flush all buffers before stopping */ |
852d0037 | 2410 | ret = ustctl_sock_flush_buffer(app->sock, ua_sess->metadata->obj); |
90d97d10 | 2411 | if (ret < 0) { |
852d0037 | 2412 | ERR("UST app PID %d metadata flush failed with ret %d", app->pid, |
7db205b5 | 2413 | ret); |
90d97d10 DG |
2414 | } |
2415 | ||
7db205b5 DG |
2416 | end: |
2417 | rcu_read_unlock(); | |
86acf0da | 2418 | health_code_update(&health_thread_cmd); |
8be98f9a MD |
2419 | return 0; |
2420 | ||
2421 | error_rcu_unlock: | |
2422 | rcu_read_unlock(); | |
86acf0da | 2423 | health_code_update(&health_thread_cmd); |
8be98f9a MD |
2424 | return -1; |
2425 | } | |
2426 | ||
84cd17c6 MD |
2427 | /* |
2428 | * Destroy a specific UST session in apps. | |
2429 | */ | |
2430 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2431 | { | |
2432 | struct ust_app_session *ua_sess; | |
2433 | struct lttng_ust_object_data obj; | |
bec39940 DG |
2434 | struct lttng_ht_iter iter; |
2435 | struct lttng_ht_node_ulong *node; | |
525b0740 | 2436 | int ret; |
84cd17c6 | 2437 | |
852d0037 | 2438 | DBG("Destroy tracing for ust app pid %d", app->pid); |
84cd17c6 MD |
2439 | |
2440 | rcu_read_lock(); | |
2441 | ||
e0c7ec2b DG |
2442 | if (!app->compatible) { |
2443 | goto end; | |
2444 | } | |
2445 | ||
84cd17c6 | 2446 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 2447 | node = lttng_ht_iter_get_node_ulong(&iter); |
84cd17c6 MD |
2448 | if (node == NULL) { |
2449 | /* Only malloc can failed so something is really wrong */ | |
2450 | goto error_rcu_unlock; | |
2451 | } | |
2452 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
bec39940 | 2453 | ret = lttng_ht_del(app->sessions, &iter); |
c4a1715b DG |
2454 | if (ret) { |
2455 | /* Already scheduled for teardown. */ | |
2456 | goto end; | |
2457 | } | |
2458 | ||
84cd17c6 MD |
2459 | obj.handle = ua_sess->handle; |
2460 | obj.shm_fd = -1; | |
2461 | obj.wait_fd = -1; | |
2462 | obj.memory_map_size = 0; | |
86acf0da | 2463 | health_code_update(&health_thread_cmd); |
852d0037 | 2464 | ustctl_release_object(app->sock, &obj); |
84cd17c6 | 2465 | |
86acf0da | 2466 | health_code_update(&health_thread_cmd); |
852d0037 | 2467 | delete_ust_app_session(app->sock, ua_sess); |
7db205b5 | 2468 | |
84cd17c6 | 2469 | /* Quiescent wait after stopping trace */ |
852d0037 | 2470 | ustctl_wait_quiescent(app->sock); |
84cd17c6 | 2471 | |
e0c7ec2b DG |
2472 | end: |
2473 | rcu_read_unlock(); | |
86acf0da | 2474 | health_code_update(&health_thread_cmd); |
84cd17c6 MD |
2475 | return 0; |
2476 | ||
2477 | error_rcu_unlock: | |
2478 | rcu_read_unlock(); | |
86acf0da | 2479 | health_code_update(&health_thread_cmd); |
84cd17c6 MD |
2480 | return -1; |
2481 | } | |
2482 | ||
5b4a0ec0 DG |
2483 | /* |
2484 | * Start tracing for the UST session. | |
2485 | */ | |
421cb601 DG |
2486 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
2487 | { | |
2488 | int ret = 0; | |
bec39940 | 2489 | struct lttng_ht_iter iter; |
421cb601 | 2490 | struct ust_app *app; |
48842b30 | 2491 | |
421cb601 DG |
2492 | DBG("Starting all UST traces"); |
2493 | ||
2494 | rcu_read_lock(); | |
421cb601 | 2495 | |
852d0037 | 2496 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
421cb601 | 2497 | ret = ust_app_start_trace(usess, app); |
48842b30 | 2498 | if (ret < 0) { |
5b4a0ec0 DG |
2499 | /* Continue to next apps even on error */ |
2500 | continue; | |
48842b30 | 2501 | } |
48842b30 | 2502 | } |
5b4a0ec0 | 2503 | |
48842b30 DG |
2504 | rcu_read_unlock(); |
2505 | ||
2506 | return 0; | |
2507 | } | |
487cf67c | 2508 | |
8be98f9a MD |
2509 | /* |
2510 | * Start tracing for the UST session. | |
2511 | */ | |
2512 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
2513 | { | |
2514 | int ret = 0; | |
bec39940 | 2515 | struct lttng_ht_iter iter; |
8be98f9a MD |
2516 | struct ust_app *app; |
2517 | ||
2518 | DBG("Stopping all UST traces"); | |
2519 | ||
2520 | rcu_read_lock(); | |
2521 | ||
852d0037 | 2522 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
8be98f9a MD |
2523 | ret = ust_app_stop_trace(usess, app); |
2524 | if (ret < 0) { | |
2525 | /* Continue to next apps even on error */ | |
2526 | continue; | |
2527 | } | |
2528 | } | |
2529 | ||
2530 | rcu_read_unlock(); | |
2531 | ||
2532 | return 0; | |
2533 | } | |
2534 | ||
84cd17c6 MD |
2535 | /* |
2536 | * Destroy app UST session. | |
2537 | */ | |
2538 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
2539 | { | |
2540 | int ret = 0; | |
bec39940 | 2541 | struct lttng_ht_iter iter; |
84cd17c6 MD |
2542 | struct ust_app *app; |
2543 | ||
2544 | DBG("Destroy all UST traces"); | |
2545 | ||
2546 | rcu_read_lock(); | |
2547 | ||
852d0037 | 2548 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
84cd17c6 MD |
2549 | ret = ust_app_destroy_trace(usess, app); |
2550 | if (ret < 0) { | |
2551 | /* Continue to next apps even on error */ | |
2552 | continue; | |
2553 | } | |
2554 | } | |
2555 | ||
2556 | rcu_read_unlock(); | |
2557 | ||
2558 | return 0; | |
2559 | } | |
2560 | ||
5b4a0ec0 DG |
2561 | /* |
2562 | * Add channels/events from UST global domain to registered apps at sock. | |
2563 | */ | |
487cf67c DG |
2564 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
2565 | { | |
55c54cce | 2566 | int ret = 0; |
727d5404 | 2567 | struct lttng_ht_iter iter, uiter, iter_ctx; |
487cf67c DG |
2568 | struct ust_app *app; |
2569 | struct ust_app_session *ua_sess; | |
2570 | struct ust_app_channel *ua_chan; | |
2571 | struct ust_app_event *ua_event; | |
727d5404 | 2572 | struct ust_app_ctx *ua_ctx; |
1f3580c7 DG |
2573 | |
2574 | if (usess == NULL) { | |
5b4a0ec0 | 2575 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
2576 | goto error; |
2577 | } | |
2578 | ||
a991f516 MD |
2579 | DBG2("UST app global update for app sock %d for session id %d", sock, |
2580 | usess->id); | |
487cf67c | 2581 | |
284d8f55 DG |
2582 | rcu_read_lock(); |
2583 | ||
487cf67c DG |
2584 | app = find_app_by_sock(sock); |
2585 | if (app == NULL) { | |
2586 | ERR("Failed to update app sock %d", sock); | |
2587 | goto error; | |
2588 | } | |
2589 | ||
e0c7ec2b DG |
2590 | if (!app->compatible) { |
2591 | goto error; | |
2592 | } | |
2593 | ||
421cb601 | 2594 | ua_sess = create_ust_app_session(usess, app); |
5b98a774 DG |
2595 | if (ua_sess == NULL || ua_sess == (void *) -1UL) { |
2596 | /* Tracer is gone for this session and has been freed */ | |
487cf67c DG |
2597 | goto error; |
2598 | } | |
2599 | ||
284d8f55 DG |
2600 | /* |
2601 | * We can iterate safely here over all UST app session sicne the create ust | |
2602 | * app session above made a shadow copy of the UST global domain from the | |
2603 | * ltt ust session. | |
2604 | */ | |
bec39940 DG |
2605 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2606 | node.node) { | |
284d8f55 DG |
2607 | ret = create_ust_channel(app, ua_sess, ua_chan); |
2608 | if (ret < 0) { | |
2609 | /* FIXME: Should we quit here or continue... */ | |
2610 | continue; | |
487cf67c DG |
2611 | } |
2612 | ||
727d5404 DG |
2613 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter_ctx.iter, ua_ctx, |
2614 | node.node) { | |
2615 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
2616 | if (ret < 0) { | |
2617 | /* FIXME: Should we quit here or continue... */ | |
2618 | continue; | |
2619 | } | |
2620 | } | |
2621 | ||
2622 | ||
284d8f55 | 2623 | /* For each events */ |
bec39940 DG |
2624 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
2625 | node.node) { | |
284d8f55 DG |
2626 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
2627 | if (ret < 0) { | |
2628 | /* FIXME: Should we quit here or continue... */ | |
2629 | continue; | |
487cf67c | 2630 | } |
727d5404 | 2631 | |
53a80697 MD |
2632 | ret = set_ust_event_filter(ua_event, app); |
2633 | if (ret < 0) { | |
2634 | /* FIXME: Should we quit here or continue... */ | |
2635 | continue; | |
2636 | } | |
36dc12cc | 2637 | } |
487cf67c DG |
2638 | } |
2639 | ||
36dc12cc | 2640 | if (usess->start_trace) { |
421cb601 | 2641 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 2642 | if (ret < 0) { |
36dc12cc DG |
2643 | goto error; |
2644 | } | |
2645 | ||
852d0037 | 2646 | DBG2("UST trace started for app pid %d", app->pid); |
36dc12cc DG |
2647 | } |
2648 | ||
487cf67c DG |
2649 | error: |
2650 | rcu_read_unlock(); | |
2651 | return; | |
2652 | } | |
55cc08a6 DG |
2653 | |
2654 | /* | |
2655 | * Add context to a specific channel for global UST domain. | |
2656 | */ | |
2657 | int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess, | |
2658 | struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx) | |
2659 | { | |
2660 | int ret = 0; | |
bec39940 DG |
2661 | struct lttng_ht_node_str *ua_chan_node; |
2662 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2663 | struct ust_app_channel *ua_chan = NULL; |
2664 | struct ust_app_session *ua_sess; | |
2665 | struct ust_app *app; | |
2666 | ||
2667 | rcu_read_lock(); | |
2668 | ||
852d0037 | 2669 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2670 | if (!app->compatible) { |
2671 | /* | |
2672 | * TODO: In time, we should notice the caller of this error by | |
2673 | * telling him that this is a version error. | |
2674 | */ | |
2675 | continue; | |
2676 | } | |
55cc08a6 DG |
2677 | ua_sess = lookup_session_by_app(usess, app); |
2678 | if (ua_sess == NULL) { | |
2679 | continue; | |
2680 | } | |
2681 | ||
2682 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2683 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2684 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2685 | if (ua_chan_node == NULL) { |
2686 | continue; | |
2687 | } | |
2688 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2689 | node); | |
2690 | ||
2691 | ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app); | |
2692 | if (ret < 0) { | |
2693 | continue; | |
2694 | } | |
2695 | } | |
2696 | ||
55cc08a6 DG |
2697 | rcu_read_unlock(); |
2698 | return ret; | |
2699 | } | |
2700 | ||
76d45b40 DG |
2701 | /* |
2702 | * Enable event for a channel from a UST session for a specific PID. | |
2703 | */ | |
2704 | int ust_app_enable_event_pid(struct ltt_ust_session *usess, | |
2705 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2706 | { | |
2707 | int ret = 0; | |
bec39940 | 2708 | struct lttng_ht_iter iter; |
18eace3b | 2709 | struct lttng_ht_node_str *ua_chan_node; |
76d45b40 DG |
2710 | struct ust_app *app; |
2711 | struct ust_app_session *ua_sess; | |
2712 | struct ust_app_channel *ua_chan; | |
2713 | struct ust_app_event *ua_event; | |
2714 | ||
2715 | DBG("UST app enabling event %s for PID %d", uevent->attr.name, pid); | |
2716 | ||
2717 | rcu_read_lock(); | |
2718 | ||
2719 | app = ust_app_find_by_pid(pid); | |
2720 | if (app == NULL) { | |
2721 | ERR("UST app enable event per PID %d not found", pid); | |
2722 | ret = -1; | |
2723 | goto error; | |
2724 | } | |
2725 | ||
e0c7ec2b DG |
2726 | if (!app->compatible) { |
2727 | ret = 0; | |
2728 | goto error; | |
2729 | } | |
2730 | ||
76d45b40 | 2731 | ua_sess = lookup_session_by_app(usess, app); |
c4a1715b DG |
2732 | if (!ua_sess) { |
2733 | /* The application has problem or is probably dead. */ | |
2734 | goto error; | |
2735 | } | |
76d45b40 DG |
2736 | |
2737 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2738 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2739 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2740 | /* If the channel is not found, there is a code flow error */ |
2741 | assert(ua_chan_node); | |
2742 | ||
2743 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2744 | ||
18eace3b DG |
2745 | ua_event = find_ust_app_event(ua_chan->events, uevent->attr.name, |
2746 | uevent->filter, uevent->attr.loglevel); | |
2747 | if (ua_event == NULL) { | |
76d45b40 DG |
2748 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
2749 | if (ret < 0) { | |
2750 | goto error; | |
2751 | } | |
2752 | } else { | |
76d45b40 DG |
2753 | ret = enable_ust_app_event(ua_sess, ua_event, app); |
2754 | if (ret < 0) { | |
2755 | goto error; | |
2756 | } | |
2757 | } | |
2758 | ||
2759 | error: | |
2760 | rcu_read_unlock(); | |
2761 | return ret; | |
2762 | } | |
7f79d3a1 DG |
2763 | |
2764 | /* | |
2765 | * Disable event for a channel from a UST session for a specific PID. | |
2766 | */ | |
2767 | int ust_app_disable_event_pid(struct ltt_ust_session *usess, | |
2768 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2769 | { | |
2770 | int ret = 0; | |
bec39940 DG |
2771 | struct lttng_ht_iter iter; |
2772 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
7f79d3a1 DG |
2773 | struct ust_app *app; |
2774 | struct ust_app_session *ua_sess; | |
2775 | struct ust_app_channel *ua_chan; | |
2776 | struct ust_app_event *ua_event; | |
2777 | ||
2778 | DBG("UST app disabling event %s for PID %d", uevent->attr.name, pid); | |
2779 | ||
2780 | rcu_read_lock(); | |
2781 | ||
2782 | app = ust_app_find_by_pid(pid); | |
2783 | if (app == NULL) { | |
2784 | ERR("UST app disable event per PID %d not found", pid); | |
2785 | ret = -1; | |
2786 | goto error; | |
2787 | } | |
2788 | ||
e0c7ec2b DG |
2789 | if (!app->compatible) { |
2790 | ret = 0; | |
2791 | goto error; | |
2792 | } | |
2793 | ||
7f79d3a1 | 2794 | ua_sess = lookup_session_by_app(usess, app); |
c4a1715b DG |
2795 | if (!ua_sess) { |
2796 | /* The application has problem or is probably dead. */ | |
2797 | goto error; | |
2798 | } | |
7f79d3a1 DG |
2799 | |
2800 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2801 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2802 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2803 | if (ua_chan_node == NULL) { |
2804 | /* Channel does not exist, skip disabling */ | |
2805 | goto error; | |
2806 | } | |
2807 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2808 | ||
bec39940 DG |
2809 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2810 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2811 | if (ua_event_node == NULL) { |
2812 | /* Event does not exist, skip disabling */ | |
2813 | goto error; | |
2814 | } | |
2815 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2816 | ||
2817 | ret = disable_ust_app_event(ua_sess, ua_event, app); | |
2818 | if (ret < 0) { | |
2819 | goto error; | |
2820 | } | |
2821 | ||
2822 | error: | |
2823 | rcu_read_unlock(); | |
2824 | return ret; | |
2825 | } | |
e0c7ec2b DG |
2826 | |
2827 | /* | |
2828 | * Validate version of UST apps and set the compatible bit. | |
2829 | */ | |
2830 | int ust_app_validate_version(int sock) | |
2831 | { | |
2832 | int ret; | |
2833 | struct ust_app *app; | |
2834 | ||
2835 | rcu_read_lock(); | |
2836 | ||
2837 | app = find_app_by_sock(sock); | |
2838 | assert(app); | |
2839 | ||
86acf0da DG |
2840 | health_code_update(&health_thread_cmd); |
2841 | ||
e0c7ec2b DG |
2842 | ret = ustctl_tracer_version(sock, &app->version); |
2843 | if (ret < 0) { | |
2844 | goto error; | |
2845 | } | |
2846 | ||
2847 | /* Validate version */ | |
aee0cea0 | 2848 | if (app->version.major != UST_APP_MAJOR_VERSION) { |
e0c7ec2b DG |
2849 | goto error; |
2850 | } | |
2851 | ||
68264071 | 2852 | DBG2("UST app PID %d is compatible with internal major version %d " |
aee0cea0 | 2853 | "(supporting == %d)", app->pid, app->version.major, |
e0c7ec2b DG |
2854 | UST_APP_MAJOR_VERSION); |
2855 | app->compatible = 1; | |
2856 | rcu_read_unlock(); | |
86acf0da | 2857 | health_code_update(&health_thread_cmd); |
e0c7ec2b DG |
2858 | return 0; |
2859 | ||
2860 | error: | |
68264071 | 2861 | DBG2("UST app PID %d is not compatible with internal major version %d " |
aee0cea0 | 2862 | "(supporting == %d)", app->pid, app->version.major, |
e0c7ec2b DG |
2863 | UST_APP_MAJOR_VERSION); |
2864 | app->compatible = 0; | |
2865 | rcu_read_unlock(); | |
86acf0da | 2866 | health_code_update(&health_thread_cmd); |
e0c7ec2b DG |
2867 | return -1; |
2868 | } | |
4466912f DG |
2869 | |
2870 | /* | |
2871 | * Calibrate registered applications. | |
2872 | */ | |
2873 | int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate) | |
2874 | { | |
2875 | int ret = 0; | |
2876 | struct lttng_ht_iter iter; | |
2877 | struct ust_app *app; | |
2878 | ||
2879 | rcu_read_lock(); | |
2880 | ||
852d0037 | 2881 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
4466912f DG |
2882 | if (!app->compatible) { |
2883 | /* | |
2884 | * TODO: In time, we should notice the caller of this error by | |
2885 | * telling him that this is a version error. | |
2886 | */ | |
2887 | continue; | |
2888 | } | |
2889 | ||
86acf0da DG |
2890 | health_code_update(&health_thread_cmd); |
2891 | ||
852d0037 | 2892 | ret = ustctl_calibrate(app->sock, calibrate); |
4466912f DG |
2893 | if (ret < 0) { |
2894 | switch (ret) { | |
2895 | case -ENOSYS: | |
2896 | /* Means that it's not implemented on the tracer side. */ | |
2897 | ret = 0; | |
2898 | break; | |
2899 | default: | |
2900 | /* TODO: Report error to user */ | |
2901 | DBG2("Calibrate app PID %d returned with error %d", | |
852d0037 | 2902 | app->pid, ret); |
4466912f DG |
2903 | break; |
2904 | } | |
2905 | } | |
2906 | } | |
2907 | ||
2908 | DBG("UST app global domain calibration finished"); | |
2909 | ||
2910 | rcu_read_unlock(); | |
2911 | ||
86acf0da DG |
2912 | health_code_update(&health_thread_cmd); |
2913 | ||
4466912f DG |
2914 | return ret; |
2915 | } |