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