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 | 157 | static |
030a66fa | 158 | void delete_ust_app_stream(int sock, struct ust_app_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; |
030a66fa | 179 | struct ust_app_stream *stream, *stmp; |
d80a6244 | 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; |
d42f20df | 259 | struct ust_app_session *ua_sess, *tmp_ua_sess; |
44d3bd01 | 260 | |
f6a9efaa | 261 | rcu_read_lock(); |
44d3bd01 | 262 | |
d80a6244 | 263 | /* Delete ust app sessions info */ |
852d0037 DG |
264 | sock = app->sock; |
265 | app->sock = -1; | |
d80a6244 | 266 | |
d42f20df DG |
267 | lttng_ht_destroy(app->sessions); |
268 | ||
8b366481 | 269 | /* Wipe sessions */ |
d42f20df DG |
270 | cds_list_for_each_entry_safe(ua_sess, tmp_ua_sess, &app->teardown_head, |
271 | teardown_node) { | |
272 | /* Free every object in the session and the session. */ | |
273 | delete_ust_app_session(sock, ua_sess); | |
d80a6244 | 274 | } |
d80a6244 | 275 | |
6414a713 | 276 | /* |
852d0037 DG |
277 | * Wait until we have deleted the application from the sock hash table |
278 | * before closing this socket, otherwise an application could re-use the | |
279 | * socket ID and race with the teardown, using the same hash table entry. | |
280 | * | |
281 | * It's OK to leave the close in call_rcu. We want it to stay unique for | |
282 | * all RCU readers that could run concurrently with unregister app, | |
283 | * therefore we _need_ to only close that socket after a grace period. So | |
284 | * it should stay in this RCU callback. | |
285 | * | |
286 | * This close() is a very important step of the synchronization model so | |
287 | * every modification to this function must be carefully reviewed. | |
6414a713 | 288 | */ |
799e2c4f MD |
289 | ret = close(sock); |
290 | if (ret) { | |
291 | PERROR("close"); | |
292 | } | |
4063050c | 293 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d80a6244 | 294 | |
852d0037 | 295 | DBG2("UST app pid %d deleted", app->pid); |
284d8f55 | 296 | free(app); |
bec39940 | 297 | |
f6a9efaa | 298 | rcu_read_unlock(); |
099e26bd DG |
299 | } |
300 | ||
301 | /* | |
f6a9efaa | 302 | * URCU intermediate call to delete an UST app. |
099e26bd | 303 | */ |
8b366481 DG |
304 | static |
305 | void delete_ust_app_rcu(struct rcu_head *head) | |
099e26bd | 306 | { |
bec39940 DG |
307 | struct lttng_ht_node_ulong *node = |
308 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa | 309 | struct ust_app *app = |
852d0037 | 310 | caa_container_of(node, struct ust_app, pid_n); |
f6a9efaa | 311 | |
852d0037 | 312 | DBG3("Call RCU deleting app PID %d", app->pid); |
f6a9efaa | 313 | delete_ust_app(app); |
099e26bd DG |
314 | } |
315 | ||
8b366481 DG |
316 | /* |
317 | * Alloc new UST app session. | |
318 | */ | |
319 | static | |
320 | struct ust_app_session *alloc_ust_app_session(void) | |
321 | { | |
322 | struct ust_app_session *ua_sess; | |
323 | ||
324 | /* Init most of the default value by allocating and zeroing */ | |
325 | ua_sess = zmalloc(sizeof(struct ust_app_session)); | |
326 | if (ua_sess == NULL) { | |
327 | PERROR("malloc"); | |
328 | goto error; | |
329 | } | |
330 | ||
331 | ua_sess->handle = -1; | |
bec39940 | 332 | ua_sess->channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
8b366481 DG |
333 | |
334 | return ua_sess; | |
335 | ||
336 | error: | |
337 | return NULL; | |
338 | } | |
339 | ||
340 | /* | |
341 | * Alloc new UST app channel. | |
342 | */ | |
343 | static | |
344 | struct ust_app_channel *alloc_ust_app_channel(char *name, | |
345 | struct lttng_ust_channel *attr) | |
346 | { | |
347 | struct ust_app_channel *ua_chan; | |
348 | ||
349 | /* Init most of the default value by allocating and zeroing */ | |
350 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); | |
351 | if (ua_chan == NULL) { | |
352 | PERROR("malloc"); | |
353 | goto error; | |
354 | } | |
355 | ||
356 | /* Setup channel name */ | |
357 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); | |
358 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
359 | ||
360 | ua_chan->enabled = 1; | |
361 | ua_chan->handle = -1; | |
bec39940 DG |
362 | ua_chan->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
363 | ua_chan->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); | |
364 | lttng_ht_node_init_str(&ua_chan->node, ua_chan->name); | |
8b366481 DG |
365 | |
366 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); | |
367 | ||
368 | /* Copy attributes */ | |
369 | if (attr) { | |
2fe6e7f5 DG |
370 | /* Translate from lttng_ust_channel to lttng_ust_channel_attr.*/ |
371 | ua_chan->attr.subbuf_size = attr->subbuf_size; | |
372 | ua_chan->attr.num_subbuf = attr->num_subbuf; | |
373 | ua_chan->attr.overwrite = attr->overwrite; | |
374 | ua_chan->attr.switch_timer_interval = attr->switch_timer_interval; | |
375 | ua_chan->attr.read_timer_interval = attr->read_timer_interval; | |
376 | ua_chan->attr.output = attr->output; | |
8b366481 DG |
377 | } |
378 | ||
379 | DBG3("UST app channel %s allocated", ua_chan->name); | |
380 | ||
381 | return ua_chan; | |
382 | ||
383 | error: | |
384 | return NULL; | |
385 | } | |
386 | ||
37f1c236 DG |
387 | /* |
388 | * Allocate and initialize a UST app stream. | |
389 | * | |
390 | * Return newly allocated stream pointer or NULL on error. | |
391 | */ | |
392 | static struct ust_app_stream *alloc_ust_app_stream(void) | |
393 | { | |
394 | struct ust_app_stream *stream = NULL; | |
395 | ||
396 | stream = zmalloc(sizeof(*stream)); | |
397 | if (stream == NULL) { | |
398 | PERROR("zmalloc ust app stream"); | |
399 | goto error; | |
400 | } | |
401 | ||
402 | /* Zero could be a valid value for a handle so flag it to -1. */ | |
403 | stream->handle = -1; | |
404 | ||
405 | error: | |
406 | return stream; | |
407 | } | |
408 | ||
8b366481 DG |
409 | /* |
410 | * Alloc new UST app event. | |
411 | */ | |
412 | static | |
413 | struct ust_app_event *alloc_ust_app_event(char *name, | |
414 | struct lttng_ust_event *attr) | |
415 | { | |
416 | struct ust_app_event *ua_event; | |
417 | ||
418 | /* Init most of the default value by allocating and zeroing */ | |
419 | ua_event = zmalloc(sizeof(struct ust_app_event)); | |
420 | if (ua_event == NULL) { | |
421 | PERROR("malloc"); | |
422 | goto error; | |
423 | } | |
424 | ||
425 | ua_event->enabled = 1; | |
426 | strncpy(ua_event->name, name, sizeof(ua_event->name)); | |
427 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
bec39940 | 428 | lttng_ht_node_init_str(&ua_event->node, ua_event->name); |
8b366481 DG |
429 | |
430 | /* Copy attributes */ | |
431 | if (attr) { | |
432 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
433 | } | |
434 | ||
435 | DBG3("UST app event %s allocated", ua_event->name); | |
436 | ||
437 | return ua_event; | |
438 | ||
439 | error: | |
440 | return NULL; | |
441 | } | |
442 | ||
443 | /* | |
444 | * Alloc new UST app context. | |
445 | */ | |
446 | static | |
447 | struct ust_app_ctx *alloc_ust_app_ctx(struct lttng_ust_context *uctx) | |
448 | { | |
449 | struct ust_app_ctx *ua_ctx; | |
450 | ||
451 | ua_ctx = zmalloc(sizeof(struct ust_app_ctx)); | |
452 | if (ua_ctx == NULL) { | |
453 | goto error; | |
454 | } | |
455 | ||
456 | if (uctx) { | |
457 | memcpy(&ua_ctx->ctx, uctx, sizeof(ua_ctx->ctx)); | |
458 | } | |
459 | ||
460 | DBG3("UST app context %d allocated", ua_ctx->ctx.ctx); | |
461 | ||
462 | error: | |
463 | return ua_ctx; | |
464 | } | |
465 | ||
025faf73 DG |
466 | /* |
467 | * Allocate a filter and copy the given original filter. | |
468 | * | |
469 | * Return allocated filter or NULL on error. | |
470 | */ | |
471 | static struct lttng_ust_filter_bytecode *alloc_copy_ust_app_filter( | |
472 | struct lttng_ust_filter_bytecode *orig_f) | |
473 | { | |
474 | struct lttng_ust_filter_bytecode *filter = NULL; | |
475 | ||
476 | /* Copy filter bytecode */ | |
477 | filter = zmalloc(sizeof(*filter) + orig_f->len); | |
478 | if (!filter) { | |
479 | PERROR("zmalloc alloc ust app filter"); | |
480 | goto error; | |
481 | } | |
482 | ||
483 | memcpy(filter, orig_f, sizeof(*filter) + orig_f->len); | |
484 | ||
485 | error: | |
486 | return filter; | |
487 | } | |
488 | ||
099e26bd | 489 | /* |
421cb601 DG |
490 | * Find an ust_app using the sock and return it. RCU read side lock must be |
491 | * held before calling this helper function. | |
099e26bd | 492 | */ |
8b366481 DG |
493 | static |
494 | struct ust_app *find_app_by_sock(int sock) | |
099e26bd | 495 | { |
bec39940 | 496 | struct lttng_ht_node_ulong *node; |
bec39940 | 497 | struct lttng_ht_iter iter; |
f6a9efaa | 498 | |
852d0037 | 499 | lttng_ht_lookup(ust_app_ht_by_sock, (void *)((unsigned long) sock), &iter); |
bec39940 | 500 | node = lttng_ht_iter_get_node_ulong(&iter); |
f6a9efaa DG |
501 | if (node == NULL) { |
502 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
503 | goto error; |
504 | } | |
852d0037 DG |
505 | |
506 | return caa_container_of(node, struct ust_app, sock_n); | |
f6a9efaa DG |
507 | |
508 | error: | |
509 | return NULL; | |
099e26bd DG |
510 | } |
511 | ||
025faf73 DG |
512 | /* |
513 | * Lookup for an ust app event based on event name, filter bytecode and the | |
514 | * event loglevel. | |
515 | * | |
516 | * Return an ust_app_event object or NULL on error. | |
517 | */ | |
18eace3b DG |
518 | static struct ust_app_event *find_ust_app_event(struct lttng_ht *ht, |
519 | char *name, struct lttng_ust_filter_bytecode *filter, int loglevel) | |
520 | { | |
521 | struct lttng_ht_iter iter; | |
522 | struct lttng_ht_node_str *node; | |
523 | struct ust_app_event *event = NULL; | |
524 | struct ust_app_ht_key key; | |
18eace3b DG |
525 | |
526 | assert(name); | |
527 | assert(ht); | |
528 | ||
529 | /* Setup key for event lookup. */ | |
530 | key.name = name; | |
531 | key.filter = filter; | |
532 | key.loglevel = loglevel; | |
533 | ||
025faf73 DG |
534 | /* Lookup using the event name as hash and a custom match fct. */ |
535 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), | |
536 | ht_match_ust_app_event, &key, &iter.iter); | |
18eace3b DG |
537 | node = lttng_ht_iter_get_node_str(&iter); |
538 | if (node == NULL) { | |
539 | goto end; | |
540 | } | |
541 | ||
542 | event = caa_container_of(node, struct ust_app_event, node); | |
543 | ||
544 | end: | |
18eace3b DG |
545 | return event; |
546 | } | |
547 | ||
55cc08a6 DG |
548 | /* |
549 | * Create the channel context on the tracer. | |
550 | */ | |
551 | static | |
552 | int create_ust_channel_context(struct ust_app_channel *ua_chan, | |
553 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
554 | { | |
555 | int ret; | |
556 | ||
86acf0da DG |
557 | health_code_update(&health_thread_cmd); |
558 | ||
852d0037 | 559 | ret = ustctl_add_context(app->sock, &ua_ctx->ctx, |
55cc08a6 DG |
560 | ua_chan->obj, &ua_ctx->obj); |
561 | if (ret < 0) { | |
562 | goto error; | |
563 | } | |
564 | ||
565 | ua_ctx->handle = ua_ctx->obj->handle; | |
566 | ||
727d5404 | 567 | DBG2("UST app context created successfully for channel %s", ua_chan->name); |
55cc08a6 DG |
568 | |
569 | error: | |
86acf0da | 570 | health_code_update(&health_thread_cmd); |
55cc08a6 DG |
571 | return ret; |
572 | } | |
573 | ||
53a80697 MD |
574 | /* |
575 | * Set the filter on the tracer. | |
576 | */ | |
577 | static | |
578 | int set_ust_event_filter(struct ust_app_event *ua_event, | |
579 | struct ust_app *app) | |
580 | { | |
581 | int ret; | |
582 | ||
86acf0da DG |
583 | health_code_update(&health_thread_cmd); |
584 | ||
53a80697 | 585 | if (!ua_event->filter) { |
86acf0da DG |
586 | ret = 0; |
587 | goto error; | |
53a80697 MD |
588 | } |
589 | ||
590 | ret = ustctl_set_filter(app->sock, ua_event->filter, | |
591 | ua_event->obj); | |
592 | if (ret < 0) { | |
593 | goto error; | |
594 | } | |
595 | ||
596 | DBG2("UST filter set successfully for event %s", ua_event->name); | |
597 | ||
598 | error: | |
86acf0da | 599 | health_code_update(&health_thread_cmd); |
53a80697 MD |
600 | return ret; |
601 | } | |
602 | ||
9730260e DG |
603 | /* |
604 | * Disable the specified event on to UST tracer for the UST session. | |
605 | */ | |
606 | static int disable_ust_event(struct ust_app *app, | |
607 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
608 | { | |
609 | int ret; | |
610 | ||
86acf0da DG |
611 | health_code_update(&health_thread_cmd); |
612 | ||
852d0037 | 613 | ret = ustctl_disable(app->sock, ua_event->obj); |
9730260e DG |
614 | if (ret < 0) { |
615 | ERR("UST app event %s disable failed for app (pid: %d) " | |
616 | "and session handle %d with ret %d", | |
852d0037 | 617 | ua_event->attr.name, app->pid, ua_sess->handle, ret); |
9730260e DG |
618 | goto error; |
619 | } | |
620 | ||
621 | DBG2("UST app event %s disabled successfully for app (pid: %d)", | |
852d0037 | 622 | ua_event->attr.name, app->pid); |
9730260e DG |
623 | |
624 | error: | |
86acf0da | 625 | health_code_update(&health_thread_cmd); |
9730260e DG |
626 | return ret; |
627 | } | |
628 | ||
78f0bacd DG |
629 | /* |
630 | * Disable the specified channel on to UST tracer for the UST session. | |
631 | */ | |
632 | static int disable_ust_channel(struct ust_app *app, | |
633 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
634 | { | |
635 | int ret; | |
636 | ||
86acf0da DG |
637 | health_code_update(&health_thread_cmd); |
638 | ||
852d0037 | 639 | ret = ustctl_disable(app->sock, ua_chan->obj); |
78f0bacd DG |
640 | if (ret < 0) { |
641 | ERR("UST app channel %s disable failed for app (pid: %d) " | |
642 | "and session handle %d with ret %d", | |
852d0037 | 643 | ua_chan->name, app->pid, ua_sess->handle, ret); |
78f0bacd DG |
644 | goto error; |
645 | } | |
646 | ||
78f0bacd | 647 | DBG2("UST app channel %s disabled successfully for app (pid: %d)", |
852d0037 | 648 | ua_chan->name, app->pid); |
78f0bacd DG |
649 | |
650 | error: | |
86acf0da | 651 | health_code_update(&health_thread_cmd); |
78f0bacd DG |
652 | return ret; |
653 | } | |
654 | ||
655 | /* | |
656 | * Enable the specified channel on to UST tracer for the UST session. | |
657 | */ | |
658 | static int enable_ust_channel(struct ust_app *app, | |
659 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
660 | { | |
661 | int ret; | |
662 | ||
86acf0da DG |
663 | health_code_update(&health_thread_cmd); |
664 | ||
852d0037 | 665 | ret = ustctl_enable(app->sock, ua_chan->obj); |
78f0bacd DG |
666 | if (ret < 0) { |
667 | ERR("UST app channel %s enable failed for app (pid: %d) " | |
668 | "and session handle %d with ret %d", | |
852d0037 | 669 | ua_chan->name, app->pid, ua_sess->handle, ret); |
78f0bacd DG |
670 | goto error; |
671 | } | |
672 | ||
673 | ua_chan->enabled = 1; | |
674 | ||
675 | DBG2("UST app channel %s enabled successfully for app (pid: %d)", | |
852d0037 | 676 | ua_chan->name, app->pid); |
78f0bacd DG |
677 | |
678 | error: | |
86acf0da | 679 | health_code_update(&health_thread_cmd); |
78f0bacd DG |
680 | return ret; |
681 | } | |
682 | ||
edb67388 DG |
683 | /* |
684 | * Enable the specified event on to UST tracer for the UST session. | |
685 | */ | |
686 | static int enable_ust_event(struct ust_app *app, | |
687 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
688 | { | |
689 | int ret; | |
690 | ||
86acf0da DG |
691 | health_code_update(&health_thread_cmd); |
692 | ||
852d0037 | 693 | ret = ustctl_enable(app->sock, ua_event->obj); |
edb67388 DG |
694 | if (ret < 0) { |
695 | ERR("UST app event %s enable failed for app (pid: %d) " | |
696 | "and session handle %d with ret %d", | |
852d0037 | 697 | ua_event->attr.name, app->pid, ua_sess->handle, ret); |
edb67388 DG |
698 | goto error; |
699 | } | |
700 | ||
701 | DBG2("UST app event %s enabled successfully for app (pid: %d)", | |
852d0037 | 702 | ua_event->attr.name, app->pid); |
edb67388 DG |
703 | |
704 | error: | |
86acf0da | 705 | health_code_update(&health_thread_cmd); |
edb67388 DG |
706 | return ret; |
707 | } | |
708 | ||
099e26bd | 709 | /* |
5b4a0ec0 | 710 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 711 | */ |
5b4a0ec0 DG |
712 | static int open_ust_metadata(struct ust_app *app, |
713 | struct ust_app_session *ua_sess) | |
0177d773 | 714 | { |
5b4a0ec0 DG |
715 | int ret; |
716 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 717 | |
86acf0da DG |
718 | health_code_update(&health_thread_cmd); |
719 | ||
5b4a0ec0 DG |
720 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
721 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
722 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
723 | uattr.switch_timer_interval = | |
724 | ua_sess->metadata->attr.switch_timer_interval; | |
725 | uattr.read_timer_interval = | |
726 | ua_sess->metadata->attr.read_timer_interval; | |
727 | uattr.output = ua_sess->metadata->attr.output; | |
728 | ||
4063050c MD |
729 | /* We are going to receive 2 fds, we need to reserve them. */ |
730 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
731 | if (ret < 0) { | |
732 | ERR("Exhausted number of available FD upon metadata open"); | |
733 | goto error; | |
734 | } | |
5b4a0ec0 | 735 | /* UST tracer metadata creation */ |
852d0037 | 736 | ret = ustctl_open_metadata(app->sock, ua_sess->handle, &uattr, |
5b4a0ec0 DG |
737 | &ua_sess->metadata->obj); |
738 | if (ret < 0) { | |
fc34caaa | 739 | ERR("UST app open metadata failed for app pid:%d with ret %d", |
852d0037 | 740 | app->pid, ret); |
f6a9efaa | 741 | goto error; |
0177d773 | 742 | } |
f6a9efaa | 743 | |
6d3686da DG |
744 | ua_sess->metadata->handle = ua_sess->metadata->obj->handle; |
745 | ||
f6a9efaa | 746 | error: |
86acf0da | 747 | health_code_update(&health_thread_cmd); |
5b4a0ec0 | 748 | return ret; |
91d76f53 DG |
749 | } |
750 | ||
751 | /* | |
5922e6c2 | 752 | * Create metadata stream onto the UST tracer for a given session. |
91d76f53 | 753 | */ |
5922e6c2 | 754 | static int create_ust_metadata_stream(struct ust_app *app, |
5b4a0ec0 | 755 | struct ust_app_session *ua_sess) |
91d76f53 | 756 | { |
5b4a0ec0 | 757 | int ret; |
421cb601 | 758 | |
86acf0da DG |
759 | health_code_update(&health_thread_cmd); |
760 | ||
4063050c MD |
761 | /* We are going to receive 2 fds, we need to reserve them. */ |
762 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
763 | if (ret < 0) { | |
764 | ERR("Exhausted number of available FD upon metadata stream create"); | |
765 | goto error; | |
766 | } | |
852d0037 | 767 | ret = ustctl_create_stream(app->sock, ua_sess->metadata->obj, |
5b4a0ec0 DG |
768 | &ua_sess->metadata->stream_obj); |
769 | if (ret < 0) { | |
2ba04c3d | 770 | lttng_fd_put(LTTNG_FD_APPS, 2); |
5b4a0ec0 | 771 | ERR("UST create metadata stream failed"); |
421cb601 | 772 | goto error; |
91d76f53 | 773 | } |
421cb601 | 774 | |
421cb601 | 775 | error: |
86acf0da | 776 | health_code_update(&health_thread_cmd); |
5b4a0ec0 | 777 | return ret; |
91d76f53 DG |
778 | } |
779 | ||
4f3ab6ee DG |
780 | /* |
781 | * Create stream onto the UST tracer for a given channel. | |
782 | * | |
783 | * Return -ENOENT if no more stream is available for this channel. | |
784 | * On success, return 0. | |
785 | * On error, return a negative value. | |
786 | */ | |
787 | static int create_ust_stream(struct ust_app *app, | |
030a66fa | 788 | struct ust_app_channel *ua_chan, struct ust_app_stream *stream) |
4f3ab6ee DG |
789 | { |
790 | int ret; | |
791 | ||
792 | assert(app); | |
793 | assert(ua_chan); | |
794 | assert(ua_chan->obj); | |
795 | assert(stream); | |
796 | ||
797 | health_code_update(&health_thread_cmd); | |
798 | ||
799 | /* We are going to receive 2 fds, we need to reserve them. */ | |
800 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
801 | if (ret < 0) { | |
802 | ERR("Exhausted number of available FD on stream creation"); | |
803 | /* Just to make sure we never return -ENOENT. */ | |
804 | ret = -1; | |
805 | goto error; | |
806 | } | |
807 | ||
7f133705 DG |
808 | /* |
809 | * Set the stream name before creating it. On error, we don't have to | |
810 | * delete it on the tracer side. | |
811 | */ | |
812 | ret = snprintf(stream->name, sizeof(stream->name), "%s_%u", | |
813 | ua_chan->name, ua_chan->streams.count); | |
814 | if (ret < 0) { | |
815 | /* Without the stream name we can't continue using it. */ | |
816 | PERROR("snprintf UST create stream"); | |
817 | /* Just to make sure we never return -ENOENT. */ | |
818 | ret = -1; | |
819 | goto error; | |
820 | } | |
821 | ||
4f3ab6ee DG |
822 | ret = ustctl_create_stream(app->sock, ua_chan->obj, &stream->obj); |
823 | if (ret < 0) { | |
824 | lttng_fd_put(LTTNG_FD_APPS, 2); | |
825 | /* Indicates that there is no more stream for that channel. */ | |
495bbffb | 826 | if (ret != -LTTNG_UST_ERR_NOENT) { |
4f3ab6ee DG |
827 | ERR("UST create metadata stream failed (ret: %d)", ret); |
828 | } | |
829 | goto error; | |
830 | } | |
831 | ||
832 | /* Set stream handle with the returned value. */ | |
833 | stream->handle = stream->obj->handle; | |
834 | ||
835 | error: | |
836 | health_code_update(&health_thread_cmd); | |
837 | return ret; | |
838 | } | |
839 | ||
b551a063 | 840 | /* |
5b4a0ec0 | 841 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 842 | */ |
5b4a0ec0 DG |
843 | static int create_ust_channel(struct ust_app *app, |
844 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 845 | { |
5b4a0ec0 | 846 | int ret; |
b551a063 | 847 | |
86acf0da DG |
848 | health_code_update(&health_thread_cmd); |
849 | ||
4063050c MD |
850 | /* We are going to receive 2 fds, we need to reserve them. */ |
851 | ret = lttng_fd_get(LTTNG_FD_APPS, 2); | |
852 | if (ret < 0) { | |
853 | ERR("Exhausted number of available FD upon create channel"); | |
854 | goto error; | |
855 | } | |
86acf0da DG |
856 | |
857 | health_code_update(&health_thread_cmd); | |
858 | ||
2fe6e7f5 DG |
859 | ret = ustctl_create_channel(app->sock, ua_sess->handle, &ua_chan->attr, |
860 | &ua_chan->obj); | |
5b4a0ec0 | 861 | if (ret < 0) { |
58f3ca76 | 862 | ERR("Creating channel %s for app (pid: %d, sock: %d) " |
5b4a0ec0 | 863 | "and session handle %d with ret %d", |
852d0037 | 864 | ua_chan->name, app->pid, app->sock, |
5b4a0ec0 | 865 | ua_sess->handle, ret); |
4063050c | 866 | lttng_fd_put(LTTNG_FD_APPS, 2); |
b551a063 DG |
867 | goto error; |
868 | } | |
869 | ||
5b4a0ec0 | 870 | ua_chan->handle = ua_chan->obj->handle; |
b551a063 | 871 | |
5b4a0ec0 | 872 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
852d0037 | 873 | ua_chan->name, app->pid, app->sock); |
b551a063 | 874 | |
86acf0da DG |
875 | health_code_update(&health_thread_cmd); |
876 | ||
8535a6d9 DG |
877 | /* If channel is not enabled, disable it on the tracer */ |
878 | if (!ua_chan->enabled) { | |
879 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
880 | if (ret < 0) { | |
881 | goto error; | |
882 | } | |
883 | } | |
884 | ||
b551a063 | 885 | error: |
86acf0da | 886 | health_code_update(&health_thread_cmd); |
b551a063 DG |
887 | return ret; |
888 | } | |
889 | ||
91d76f53 | 890 | /* |
5b4a0ec0 | 891 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 892 | */ |
edb67388 DG |
893 | static |
894 | int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess, | |
895 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event) | |
91d76f53 | 896 | { |
5b4a0ec0 | 897 | int ret = 0; |
284d8f55 | 898 | |
86acf0da DG |
899 | health_code_update(&health_thread_cmd); |
900 | ||
5b4a0ec0 | 901 | /* Create UST event on tracer */ |
852d0037 | 902 | ret = ustctl_create_event(app->sock, &ua_event->attr, ua_chan->obj, |
5b4a0ec0 DG |
903 | &ua_event->obj); |
904 | if (ret < 0) { | |
905 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
852d0037 | 906 | ua_event->attr.name, app->pid, ret); |
5b4a0ec0 | 907 | goto error; |
91d76f53 | 908 | } |
f6a9efaa | 909 | |
5b4a0ec0 | 910 | ua_event->handle = ua_event->obj->handle; |
284d8f55 | 911 | |
5b4a0ec0 | 912 | DBG2("UST app event %s created successfully for pid:%d", |
852d0037 | 913 | ua_event->attr.name, app->pid); |
f6a9efaa | 914 | |
86acf0da DG |
915 | health_code_update(&health_thread_cmd); |
916 | ||
025faf73 DG |
917 | /* Set filter if one is present. */ |
918 | if (ua_event->filter) { | |
919 | ret = set_ust_event_filter(ua_event, app); | |
920 | if (ret < 0) { | |
921 | goto error; | |
922 | } | |
923 | } | |
924 | ||
8535a6d9 | 925 | /* If event not enabled, disable it on the tracer */ |
fc34caaa | 926 | if (ua_event->enabled == 0) { |
8535a6d9 DG |
927 | ret = disable_ust_event(app, ua_sess, ua_event); |
928 | if (ret < 0) { | |
fc34caaa DG |
929 | /* |
930 | * If we hit an EPERM, something is wrong with our disable call. If | |
931 | * we get an EEXIST, there is a problem on the tracer side since we | |
932 | * just created it. | |
933 | */ | |
934 | switch (ret) { | |
49c336c1 | 935 | case -LTTNG_UST_ERR_PERM: |
fc34caaa DG |
936 | /* Code flow problem */ |
937 | assert(0); | |
49c336c1 | 938 | case -LTTNG_UST_ERR_EXIST: |
fc34caaa DG |
939 | /* It's OK for our use case. */ |
940 | ret = 0; | |
941 | break; | |
942 | default: | |
943 | break; | |
944 | } | |
8535a6d9 DG |
945 | goto error; |
946 | } | |
947 | } | |
948 | ||
5b4a0ec0 | 949 | error: |
86acf0da | 950 | health_code_update(&health_thread_cmd); |
5b4a0ec0 | 951 | return ret; |
91d76f53 | 952 | } |
48842b30 | 953 | |
5b4a0ec0 DG |
954 | /* |
955 | * Copy data between an UST app event and a LTT event. | |
956 | */ | |
421cb601 | 957 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
958 | struct ltt_ust_event *uevent) |
959 | { | |
960 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); | |
961 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
962 | ||
fc34caaa DG |
963 | ua_event->enabled = uevent->enabled; |
964 | ||
5b4a0ec0 DG |
965 | /* Copy event attributes */ |
966 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
967 | ||
53a80697 MD |
968 | /* Copy filter bytecode */ |
969 | if (uevent->filter) { | |
025faf73 DG |
970 | ua_event->filter = alloc_copy_ust_app_filter(uevent->filter); |
971 | /* Filter might be NULL here in case of ENONEM. */ | |
53a80697 | 972 | } |
48842b30 DG |
973 | } |
974 | ||
5b4a0ec0 DG |
975 | /* |
976 | * Copy data between an UST app channel and a LTT channel. | |
977 | */ | |
421cb601 | 978 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
979 | struct ltt_ust_channel *uchan) |
980 | { | |
bec39940 | 981 | struct lttng_ht_iter iter; |
48842b30 | 982 | struct ltt_ust_event *uevent; |
55cc08a6 | 983 | struct ltt_ust_context *uctx; |
48842b30 | 984 | struct ust_app_event *ua_event; |
55cc08a6 | 985 | struct ust_app_ctx *ua_ctx; |
48842b30 | 986 | |
fc34caaa | 987 | DBG2("UST app shadow copy of channel %s started", ua_chan->name); |
48842b30 DG |
988 | |
989 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
990 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
991 | /* Copy event attributes */ |
992 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 | 993 | |
fc34caaa DG |
994 | ua_chan->enabled = uchan->enabled; |
995 | ||
bec39940 | 996 | cds_lfht_for_each_entry(uchan->ctx->ht, &iter.iter, uctx, node.node) { |
55cc08a6 DG |
997 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); |
998 | if (ua_ctx == NULL) { | |
999 | continue; | |
1000 | } | |
bec39940 DG |
1001 | lttng_ht_node_init_ulong(&ua_ctx->node, |
1002 | (unsigned long) ua_ctx->ctx.ctx); | |
1003 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 | 1004 | } |
48842b30 | 1005 | |
421cb601 | 1006 | /* Copy all events from ltt ust channel to ust app channel */ |
bec39940 | 1007 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
18eace3b DG |
1008 | ua_event = find_ust_app_event(ua_chan->events, uevent->attr.name, |
1009 | uevent->filter, uevent->attr.loglevel); | |
1010 | if (ua_event == NULL) { | |
421cb601 | 1011 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 1012 | uevent->attr.name); |
284d8f55 | 1013 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 1014 | if (ua_event == NULL) { |
5b4a0ec0 | 1015 | continue; |
48842b30 | 1016 | } |
421cb601 | 1017 | shadow_copy_event(ua_event, uevent); |
18eace3b | 1018 | add_unique_ust_app_event(ua_chan->events, ua_event); |
48842b30 | 1019 | } |
48842b30 DG |
1020 | } |
1021 | ||
fc34caaa | 1022 | DBG3("UST app shadow copy of channel %s done", ua_chan->name); |
48842b30 DG |
1023 | } |
1024 | ||
5b4a0ec0 DG |
1025 | /* |
1026 | * Copy data between a UST app session and a regular LTT session. | |
1027 | */ | |
421cb601 | 1028 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
bec39940 | 1029 | struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 | 1030 | { |
bec39940 DG |
1031 | struct lttng_ht_node_str *ua_chan_node; |
1032 | struct lttng_ht_iter iter; | |
48842b30 DG |
1033 | struct ltt_ust_channel *uchan; |
1034 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
1035 | time_t rawtime; |
1036 | struct tm *timeinfo; | |
1037 | char datetime[16]; | |
1038 | int ret; | |
1039 | ||
1040 | /* Get date and time for unique app path */ | |
1041 | time(&rawtime); | |
1042 | timeinfo = localtime(&rawtime); | |
1043 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 1044 | |
421cb601 | 1045 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 | 1046 | |
a991f516 | 1047 | ua_sess->id = usess->id; |
6df2e2c9 MD |
1048 | ua_sess->uid = usess->uid; |
1049 | ua_sess->gid = usess->gid; | |
48842b30 | 1050 | |
00e2e675 DG |
1051 | ret = snprintf(ua_sess->path, PATH_MAX, "%s-%d-%s/", app->name, app->pid, |
1052 | datetime); | |
477d7741 MD |
1053 | if (ret < 0) { |
1054 | PERROR("asprintf UST shadow copy session"); | |
1055 | /* TODO: We cannot return an error from here.. */ | |
1056 | assert(0); | |
1057 | } | |
1058 | ||
48842b30 DG |
1059 | /* TODO: support all UST domain */ |
1060 | ||
1061 | /* Iterate over all channels in global domain. */ | |
bec39940 DG |
1062 | cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter, |
1063 | uchan, node.node) { | |
1064 | struct lttng_ht_iter uiter; | |
ba767faf | 1065 | |
bec39940 DG |
1066 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1067 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
5b4a0ec0 | 1068 | if (ua_chan_node != NULL) { |
fc34caaa | 1069 | /* Session exist. Contiuing. */ |
5b4a0ec0 DG |
1070 | continue; |
1071 | } | |
421cb601 | 1072 | |
5b4a0ec0 DG |
1073 | DBG2("Channel %s not found on shadow session copy, creating it", |
1074 | uchan->name); | |
1075 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
1076 | if (ua_chan == NULL) { | |
fc34caaa | 1077 | /* malloc failed FIXME: Might want to do handle ENOMEM .. */ |
5b4a0ec0 | 1078 | continue; |
48842b30 DG |
1079 | } |
1080 | ||
5b4a0ec0 | 1081 | shadow_copy_channel(ua_chan, uchan); |
bec39940 | 1082 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
48842b30 DG |
1083 | } |
1084 | } | |
1085 | ||
78f0bacd DG |
1086 | /* |
1087 | * Lookup sesison wrapper. | |
1088 | */ | |
84cd17c6 MD |
1089 | static |
1090 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
bec39940 | 1091 | struct ust_app *app, struct lttng_ht_iter *iter) |
84cd17c6 MD |
1092 | { |
1093 | /* Get right UST app session from app */ | |
2c348c10 | 1094 | lttng_ht_lookup(app->sessions, (void *)((unsigned long) usess->id), iter); |
84cd17c6 MD |
1095 | } |
1096 | ||
421cb601 DG |
1097 | /* |
1098 | * Return ust app session from the app session hashtable using the UST session | |
a991f516 | 1099 | * id. |
421cb601 | 1100 | */ |
48842b30 DG |
1101 | static struct ust_app_session *lookup_session_by_app( |
1102 | struct ltt_ust_session *usess, struct ust_app *app) | |
1103 | { | |
bec39940 DG |
1104 | struct lttng_ht_iter iter; |
1105 | struct lttng_ht_node_ulong *node; | |
48842b30 | 1106 | |
84cd17c6 | 1107 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 1108 | node = lttng_ht_iter_get_node_ulong(&iter); |
48842b30 DG |
1109 | if (node == NULL) { |
1110 | goto error; | |
1111 | } | |
1112 | ||
1113 | return caa_container_of(node, struct ust_app_session, node); | |
1114 | ||
1115 | error: | |
1116 | return NULL; | |
1117 | } | |
1118 | ||
421cb601 | 1119 | /* |
3d8ca23b | 1120 | * Create a session on the tracer side for the given app. |
421cb601 | 1121 | * |
3d8ca23b DG |
1122 | * On success, ua_sess_ptr is populated with the session pointer or else left |
1123 | * untouched. If the session was created, is_created is set to 1. On error, | |
1124 | * it's left untouched. Note that ua_sess_ptr is mandatory but is_created can | |
1125 | * be NULL. | |
1126 | * | |
1127 | * Returns 0 on success or else a negative code which is either -ENOMEM or | |
1128 | * -ENOTCONN which is the default code if the ustctl_create_session fails. | |
421cb601 | 1129 | */ |
3d8ca23b DG |
1130 | static int create_ust_app_session(struct ltt_ust_session *usess, |
1131 | struct ust_app *app, struct ust_app_session **ua_sess_ptr, | |
1132 | int *is_created) | |
421cb601 | 1133 | { |
3d8ca23b | 1134 | int ret, created = 0; |
421cb601 DG |
1135 | struct ust_app_session *ua_sess; |
1136 | ||
3d8ca23b DG |
1137 | assert(usess); |
1138 | assert(app); | |
1139 | assert(ua_sess_ptr); | |
1140 | ||
86acf0da DG |
1141 | health_code_update(&health_thread_cmd); |
1142 | ||
421cb601 DG |
1143 | ua_sess = lookup_session_by_app(usess, app); |
1144 | if (ua_sess == NULL) { | |
a991f516 | 1145 | DBG2("UST app pid: %d session id %d not found, creating it", |
852d0037 | 1146 | app->pid, usess->id); |
421cb601 DG |
1147 | ua_sess = alloc_ust_app_session(); |
1148 | if (ua_sess == NULL) { | |
1149 | /* Only malloc can failed so something is really wrong */ | |
3d8ca23b DG |
1150 | ret = -ENOMEM; |
1151 | goto error; | |
421cb601 | 1152 | } |
477d7741 | 1153 | shadow_copy_session(ua_sess, usess, app); |
3d8ca23b | 1154 | created = 1; |
421cb601 DG |
1155 | } |
1156 | ||
86acf0da DG |
1157 | health_code_update(&health_thread_cmd); |
1158 | ||
421cb601 | 1159 | if (ua_sess->handle == -1) { |
852d0037 | 1160 | ret = ustctl_create_session(app->sock); |
421cb601 | 1161 | if (ret < 0) { |
852d0037 | 1162 | ERR("Creating session for app pid %d", app->pid); |
0f83395d | 1163 | delete_ust_app_session(-1, ua_sess); |
3d8ca23b DG |
1164 | if (ret != -ENOMEM) { |
1165 | /* | |
1166 | * Tracer is probably gone or got an internal error so let's | |
1167 | * behave like it will soon unregister or not usable. | |
1168 | */ | |
1169 | ret = -ENOTCONN; | |
1170 | } | |
1171 | goto error; | |
421cb601 DG |
1172 | } |
1173 | ||
421cb601 DG |
1174 | ua_sess->handle = ret; |
1175 | ||
1176 | /* Add ust app session to app's HT */ | |
2c348c10 | 1177 | lttng_ht_node_init_ulong(&ua_sess->node, (unsigned long) ua_sess->id); |
bec39940 | 1178 | lttng_ht_add_unique_ulong(app->sessions, &ua_sess->node); |
421cb601 DG |
1179 | |
1180 | DBG2("UST app session created successfully with handle %d", ret); | |
1181 | } | |
1182 | ||
3d8ca23b DG |
1183 | *ua_sess_ptr = ua_sess; |
1184 | if (is_created) { | |
1185 | *is_created = created; | |
1186 | } | |
1187 | /* Everything went well. */ | |
1188 | ret = 0; | |
1189 | ||
1190 | error: | |
86acf0da | 1191 | health_code_update(&health_thread_cmd); |
3d8ca23b | 1192 | return ret; |
421cb601 DG |
1193 | } |
1194 | ||
55cc08a6 DG |
1195 | /* |
1196 | * Create a context for the channel on the tracer. | |
1197 | */ | |
1198 | static | |
1199 | int create_ust_app_channel_context(struct ust_app_session *ua_sess, | |
1200 | struct ust_app_channel *ua_chan, struct lttng_ust_context *uctx, | |
1201 | struct ust_app *app) | |
1202 | { | |
1203 | int ret = 0; | |
bec39940 DG |
1204 | struct lttng_ht_iter iter; |
1205 | struct lttng_ht_node_ulong *node; | |
55cc08a6 DG |
1206 | struct ust_app_ctx *ua_ctx; |
1207 | ||
1208 | DBG2("UST app adding context to channel %s", ua_chan->name); | |
1209 | ||
bec39940 DG |
1210 | lttng_ht_lookup(ua_chan->ctx, (void *)((unsigned long)uctx->ctx), &iter); |
1211 | node = lttng_ht_iter_get_node_ulong(&iter); | |
55cc08a6 DG |
1212 | if (node != NULL) { |
1213 | ret = -EEXIST; | |
1214 | goto error; | |
1215 | } | |
1216 | ||
1217 | ua_ctx = alloc_ust_app_ctx(uctx); | |
1218 | if (ua_ctx == NULL) { | |
1219 | /* malloc failed */ | |
1220 | ret = -1; | |
1221 | goto error; | |
1222 | } | |
1223 | ||
bec39940 DG |
1224 | lttng_ht_node_init_ulong(&ua_ctx->node, (unsigned long) ua_ctx->ctx.ctx); |
1225 | lttng_ht_add_unique_ulong(ua_chan->ctx, &ua_ctx->node); | |
55cc08a6 DG |
1226 | |
1227 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
1228 | if (ret < 0) { | |
1229 | goto error; | |
1230 | } | |
1231 | ||
1232 | error: | |
1233 | return ret; | |
1234 | } | |
1235 | ||
edb67388 DG |
1236 | /* |
1237 | * Enable on the tracer side a ust app event for the session and channel. | |
1238 | */ | |
1239 | static | |
1240 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 1241 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
1242 | { |
1243 | int ret; | |
1244 | ||
1245 | ret = enable_ust_event(app, ua_sess, ua_event); | |
1246 | if (ret < 0) { | |
1247 | goto error; | |
1248 | } | |
1249 | ||
1250 | ua_event->enabled = 1; | |
1251 | ||
1252 | error: | |
1253 | return ret; | |
1254 | } | |
1255 | ||
9730260e DG |
1256 | /* |
1257 | * Disable on the tracer side a ust app event for the session and channel. | |
1258 | */ | |
1259 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
7f79d3a1 | 1260 | struct ust_app_event *ua_event, struct ust_app *app) |
9730260e DG |
1261 | { |
1262 | int ret; | |
1263 | ||
1264 | ret = disable_ust_event(app, ua_sess, ua_event); | |
1265 | if (ret < 0) { | |
1266 | goto error; | |
1267 | } | |
1268 | ||
1269 | ua_event->enabled = 0; | |
1270 | ||
1271 | error: | |
1272 | return ret; | |
1273 | } | |
1274 | ||
78f0bacd DG |
1275 | /* |
1276 | * Lookup ust app channel for session and disable it on the tracer side. | |
1277 | */ | |
8535a6d9 DG |
1278 | static |
1279 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
1280 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 1281 | { |
8535a6d9 | 1282 | int ret; |
78f0bacd DG |
1283 | |
1284 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
1285 | if (ret < 0) { | |
1286 | goto error; | |
1287 | } | |
1288 | ||
8535a6d9 DG |
1289 | ua_chan->enabled = 0; |
1290 | ||
78f0bacd DG |
1291 | error: |
1292 | return ret; | |
1293 | } | |
1294 | ||
1295 | /* | |
1296 | * Lookup ust app channel for session and enable it on the tracer side. | |
1297 | */ | |
1298 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
1299 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
1300 | { | |
1301 | int ret = 0; | |
bec39940 DG |
1302 | struct lttng_ht_iter iter; |
1303 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1304 | struct ust_app_channel *ua_chan; |
1305 | ||
bec39940 DG |
1306 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1307 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
78f0bacd | 1308 | if (ua_chan_node == NULL) { |
a991f516 MD |
1309 | DBG2("Unable to find channel %s in ust session id %u", |
1310 | uchan->name, ua_sess->id); | |
78f0bacd DG |
1311 | goto error; |
1312 | } | |
1313 | ||
1314 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1315 | ||
1316 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
1317 | if (ret < 0) { | |
1318 | goto error; | |
1319 | } | |
1320 | ||
1321 | error: | |
1322 | return ret; | |
1323 | } | |
1324 | ||
284d8f55 | 1325 | /* |
4d710ac2 DG |
1326 | * Create UST app channel and create it on the tracer. Set ua_chanp of the |
1327 | * newly created channel if not NULL. | |
284d8f55 | 1328 | */ |
4d710ac2 DG |
1329 | static int create_ust_app_channel(struct ust_app_session *ua_sess, |
1330 | struct ltt_ust_channel *uchan, struct ust_app *app, | |
1331 | struct ust_app_channel **ua_chanp) | |
5b4a0ec0 DG |
1332 | { |
1333 | int ret = 0; | |
bec39940 DG |
1334 | struct lttng_ht_iter iter; |
1335 | struct lttng_ht_node_str *ua_chan_node; | |
5b4a0ec0 DG |
1336 | struct ust_app_channel *ua_chan; |
1337 | ||
1338 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
1339 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
1340 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
fc34caaa | 1341 | if (ua_chan_node != NULL) { |
5b4a0ec0 | 1342 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
fc34caaa | 1343 | goto end; |
5b4a0ec0 DG |
1344 | } |
1345 | ||
fc34caaa DG |
1346 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); |
1347 | if (ua_chan == NULL) { | |
1348 | /* Only malloc can fail here */ | |
4d710ac2 | 1349 | ret = -ENOMEM; |
fc34caaa DG |
1350 | goto error; |
1351 | } | |
1352 | shadow_copy_channel(ua_chan, uchan); | |
1353 | ||
5b4a0ec0 DG |
1354 | ret = create_ust_channel(app, ua_sess, ua_chan); |
1355 | if (ret < 0) { | |
fc34caaa | 1356 | /* Not found previously means that it does not exist on the tracer */ |
49c336c1 | 1357 | assert(ret != -LTTNG_UST_ERR_EXIST); |
5b4a0ec0 DG |
1358 | goto error; |
1359 | } | |
1360 | ||
4d710ac2 | 1361 | /* Only add the channel if successful on the tracer side. */ |
58f3ca76 DG |
1362 | lttng_ht_add_unique_str(ua_sess->channels, &ua_chan->node); |
1363 | ||
fc34caaa | 1364 | DBG2("UST app create channel %s for PID %d completed", ua_chan->name, |
852d0037 | 1365 | app->pid); |
fc34caaa DG |
1366 | |
1367 | end: | |
4d710ac2 DG |
1368 | if (ua_chanp) { |
1369 | *ua_chanp = ua_chan; | |
1370 | } | |
1371 | ||
1372 | /* Everything went well. */ | |
1373 | return 0; | |
5b4a0ec0 DG |
1374 | |
1375 | error: | |
fc34caaa | 1376 | delete_ust_app_channel(-1, ua_chan); |
4d710ac2 | 1377 | return ret; |
5b4a0ec0 DG |
1378 | } |
1379 | ||
1380 | /* | |
1381 | * Create UST app event and create it on the tracer side. | |
1382 | */ | |
edb67388 DG |
1383 | static |
1384 | int create_ust_app_event(struct ust_app_session *ua_sess, | |
1385 | struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent, | |
1386 | struct ust_app *app) | |
284d8f55 | 1387 | { |
edb67388 | 1388 | int ret = 0; |
5b4a0ec0 | 1389 | struct ust_app_event *ua_event; |
284d8f55 | 1390 | |
5b4a0ec0 | 1391 | /* Get event node */ |
18eace3b DG |
1392 | ua_event = find_ust_app_event(ua_chan->events, uevent->attr.name, |
1393 | uevent->filter, uevent->attr.loglevel); | |
1394 | if (ua_event != NULL) { | |
fc34caaa | 1395 | ret = -EEXIST; |
edb67388 DG |
1396 | goto end; |
1397 | } | |
5b4a0ec0 | 1398 | |
edb67388 DG |
1399 | /* Does not exist so create one */ |
1400 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
1401 | if (ua_event == NULL) { | |
1402 | /* Only malloc can failed so something is really wrong */ | |
1403 | ret = -ENOMEM; | |
fc34caaa | 1404 | goto end; |
5b4a0ec0 | 1405 | } |
edb67388 | 1406 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 1407 | |
edb67388 | 1408 | /* Create it on the tracer side */ |
5b4a0ec0 | 1409 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 1410 | if (ret < 0) { |
fc34caaa | 1411 | /* Not found previously means that it does not exist on the tracer */ |
76f66f63 | 1412 | assert(ret != -LTTNG_UST_ERR_EXIST); |
284d8f55 DG |
1413 | goto error; |
1414 | } | |
1415 | ||
18eace3b | 1416 | add_unique_ust_app_event(ua_chan->events, ua_event); |
284d8f55 | 1417 | |
fc34caaa | 1418 | DBG2("UST app create event %s for PID %d completed", ua_event->name, |
852d0037 | 1419 | app->pid); |
7f79d3a1 | 1420 | |
edb67388 | 1421 | end: |
fc34caaa DG |
1422 | return ret; |
1423 | ||
5b4a0ec0 | 1424 | error: |
fc34caaa DG |
1425 | /* Valid. Calling here is already in a read side lock */ |
1426 | delete_ust_app_event(-1, ua_event); | |
edb67388 | 1427 | return ret; |
5b4a0ec0 DG |
1428 | } |
1429 | ||
1430 | /* | |
1431 | * Create UST metadata and open it on the tracer side. | |
1432 | */ | |
1433 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
1434 | char *pathname, struct ust_app *app) | |
1435 | { | |
1436 | int ret = 0; | |
1437 | ||
1438 | if (ua_sess->metadata == NULL) { | |
1439 | /* Allocate UST metadata */ | |
1440 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
1441 | if (ua_sess->metadata == NULL) { | |
fc34caaa | 1442 | /* malloc() failed */ |
5b4a0ec0 DG |
1443 | goto error; |
1444 | } | |
1445 | ||
1446 | ret = open_ust_metadata(app, ua_sess); | |
1447 | if (ret < 0) { | |
7db205b5 DG |
1448 | DBG3("Opening metadata failed. Cleaning up memory"); |
1449 | ||
fc34caaa DG |
1450 | /* Cleanup failed metadata struct */ |
1451 | free(ua_sess->metadata); | |
7db205b5 DG |
1452 | /* |
1453 | * This is very important because delete_ust_app_session check if | |
1454 | * the pointer is null or not in order to delete the metadata. | |
1455 | */ | |
1456 | ua_sess->metadata = NULL; | |
5b4a0ec0 DG |
1457 | goto error; |
1458 | } | |
1459 | ||
852d0037 | 1460 | DBG2("UST metadata opened for app pid %d", app->pid); |
5b4a0ec0 DG |
1461 | } |
1462 | ||
1463 | /* Open UST metadata stream */ | |
1464 | if (ua_sess->metadata->stream_obj == NULL) { | |
5922e6c2 | 1465 | ret = create_ust_metadata_stream(app, ua_sess); |
5b4a0ec0 DG |
1466 | if (ret < 0) { |
1467 | goto error; | |
1468 | } | |
1469 | ||
477d7741 | 1470 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
30079b6b | 1471 | "%s/" DEFAULT_METADATA_NAME, ua_sess->path); |
5b4a0ec0 DG |
1472 | if (ret < 0) { |
1473 | PERROR("asprintf UST create stream"); | |
1474 | goto error; | |
1475 | } | |
1476 | ||
1477 | DBG2("UST metadata stream object created for app pid %d", | |
852d0037 | 1478 | app->pid); |
5b4a0ec0 DG |
1479 | } else { |
1480 | ERR("Attempting to create stream without metadata opened"); | |
1481 | goto error; | |
1482 | } | |
1483 | ||
1484 | return 0; | |
1485 | ||
1486 | error: | |
1487 | return -1; | |
1488 | } | |
1489 | ||
1490 | /* | |
1491 | * Return pointer to traceable apps list. | |
1492 | */ | |
bec39940 | 1493 | struct lttng_ht *ust_app_get_ht(void) |
5b4a0ec0 DG |
1494 | { |
1495 | return ust_app_ht; | |
1496 | } | |
1497 | ||
1498 | /* | |
1499 | * Return ust app pointer or NULL if not found. | |
1500 | */ | |
1501 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
1502 | { | |
bec39940 DG |
1503 | struct lttng_ht_node_ulong *node; |
1504 | struct lttng_ht_iter iter; | |
5b4a0ec0 DG |
1505 | |
1506 | rcu_read_lock(); | |
bec39940 DG |
1507 | lttng_ht_lookup(ust_app_ht, (void *)((unsigned long) pid), &iter); |
1508 | node = lttng_ht_iter_get_node_ulong(&iter); | |
5b4a0ec0 DG |
1509 | if (node == NULL) { |
1510 | DBG2("UST app no found with pid %d", pid); | |
1511 | goto error; | |
1512 | } | |
1513 | rcu_read_unlock(); | |
1514 | ||
1515 | DBG2("Found UST app by pid %d", pid); | |
1516 | ||
852d0037 | 1517 | return caa_container_of(node, struct ust_app, pid_n); |
5b4a0ec0 DG |
1518 | |
1519 | error: | |
1520 | rcu_read_unlock(); | |
1521 | return NULL; | |
1522 | } | |
1523 | ||
1524 | /* | |
1525 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
1526 | * add it to the global traceable app list. | |
1527 | * | |
0df502fd MD |
1528 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
1529 | * bitness is not supported. | |
5b4a0ec0 DG |
1530 | */ |
1531 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
1532 | { | |
1533 | struct ust_app *lta; | |
799e2c4f | 1534 | int ret; |
5b4a0ec0 | 1535 | |
173af62f DG |
1536 | if ((msg->bits_per_long == 64 && |
1537 | (uatomic_read(&ust_consumerd64_fd) == -EINVAL)) | |
1538 | || (msg->bits_per_long == 32 && | |
1539 | (uatomic_read(&ust_consumerd32_fd) == -EINVAL))) { | |
f943b0fb | 1540 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1541 | "%d-bit long, but no consumerd for this long size is available.\n", |
1542 | msg->name, msg->pid, msg->bits_per_long); | |
799e2c4f MD |
1543 | ret = close(sock); |
1544 | if (ret) { | |
1545 | PERROR("close"); | |
1546 | } | |
4063050c | 1547 | lttng_fd_put(LTTNG_FD_APPS, 1); |
0df502fd MD |
1548 | return -EINVAL; |
1549 | } | |
3f2c5fcc MD |
1550 | if (msg->major != LTTNG_UST_COMM_MAJOR) { |
1551 | ERR("Registration failed: application \"%s\" (pid: %d) has " | |
1552 | "communication protocol version %u.%u, but sessiond supports 2.x.\n", | |
1553 | msg->name, msg->pid, msg->major, msg->minor); | |
799e2c4f MD |
1554 | ret = close(sock); |
1555 | if (ret) { | |
1556 | PERROR("close"); | |
1557 | } | |
4063050c | 1558 | lttng_fd_put(LTTNG_FD_APPS, 1); |
3f2c5fcc MD |
1559 | return -EINVAL; |
1560 | } | |
5b4a0ec0 DG |
1561 | lta = zmalloc(sizeof(struct ust_app)); |
1562 | if (lta == NULL) { | |
1563 | PERROR("malloc"); | |
1564 | return -ENOMEM; | |
1565 | } | |
1566 | ||
1567 | lta->ppid = msg->ppid; | |
1568 | lta->uid = msg->uid; | |
1569 | lta->gid = msg->gid; | |
e0c7ec2b | 1570 | lta->compatible = 0; /* Not compatible until proven */ |
7753dea8 | 1571 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1572 | lta->v_major = msg->major; |
1573 | lta->v_minor = msg->minor; | |
1574 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1575 | lta->name[16] = '\0'; | |
bec39940 | 1576 | lta->sessions = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
5b4a0ec0 | 1577 | |
852d0037 DG |
1578 | lta->pid = msg->pid; |
1579 | lttng_ht_node_init_ulong(<a->pid_n, (unsigned long)lta->pid); | |
1580 | lta->sock = sock; | |
1581 | lttng_ht_node_init_ulong(<a->sock_n, (unsigned long)lta->sock); | |
5b4a0ec0 | 1582 | |
d42f20df DG |
1583 | CDS_INIT_LIST_HEAD(<a->teardown_head); |
1584 | ||
5b4a0ec0 | 1585 | rcu_read_lock(); |
852d0037 DG |
1586 | |
1587 | /* | |
1588 | * On a re-registration, we want to kick out the previous registration of | |
1589 | * that pid | |
1590 | */ | |
1591 | lttng_ht_add_replace_ulong(ust_app_ht, <a->pid_n); | |
1592 | ||
1593 | /* | |
1594 | * The socket _should_ be unique until _we_ call close. So, a add_unique | |
1595 | * for the ust_app_ht_by_sock is used which asserts fail if the entry was | |
1596 | * already in the table. | |
1597 | */ | |
1598 | lttng_ht_add_unique_ulong(ust_app_ht_by_sock, <a->sock_n); | |
1599 | ||
5b4a0ec0 DG |
1600 | rcu_read_unlock(); |
1601 | ||
1602 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
852d0037 DG |
1603 | " (version %d.%d)", lta->pid, lta->ppid, lta->uid, lta->gid, |
1604 | lta->sock, lta->name, lta->v_major, lta->v_minor); | |
5b4a0ec0 DG |
1605 | |
1606 | return 0; | |
1607 | } | |
1608 | ||
1609 | /* | |
1610 | * Unregister app by removing it from the global traceable app list and freeing | |
1611 | * the data struct. | |
1612 | * | |
1613 | * The socket is already closed at this point so no close to sock. | |
1614 | */ | |
1615 | void ust_app_unregister(int sock) | |
1616 | { | |
1617 | struct ust_app *lta; | |
bec39940 DG |
1618 | struct lttng_ht_node_ulong *node; |
1619 | struct lttng_ht_iter iter; | |
d42f20df | 1620 | struct ust_app_session *ua_sess; |
525b0740 | 1621 | int ret; |
5b4a0ec0 DG |
1622 | |
1623 | rcu_read_lock(); | |
886459c6 | 1624 | |
5b4a0ec0 | 1625 | /* Get the node reference for a call_rcu */ |
852d0037 | 1626 | lttng_ht_lookup(ust_app_ht_by_sock, (void *)((unsigned long) sock), &iter); |
bec39940 | 1627 | node = lttng_ht_iter_get_node_ulong(&iter); |
5b4a0ec0 | 1628 | if (node == NULL) { |
852d0037 | 1629 | ERR("Unable to find app by sock %d", sock); |
5b4a0ec0 DG |
1630 | goto error; |
1631 | } | |
284d8f55 | 1632 | |
852d0037 DG |
1633 | lta = caa_container_of(node, struct ust_app, sock_n); |
1634 | ||
1635 | DBG("PID %d unregistering with sock %d", lta->pid, sock); | |
1636 | ||
886459c6 | 1637 | /* Remove application from PID hash table */ |
852d0037 DG |
1638 | ret = lttng_ht_del(ust_app_ht_by_sock, &iter); |
1639 | assert(!ret); | |
1640 | ||
1641 | /* Assign second node for deletion */ | |
1642 | iter.iter.node = <a->pid_n.node; | |
1643 | ||
5b98a774 DG |
1644 | /* |
1645 | * Ignore return value since the node might have been removed before by an | |
1646 | * add replace during app registration because the PID can be reassigned by | |
1647 | * the OS. | |
1648 | */ | |
bec39940 | 1649 | ret = lttng_ht_del(ust_app_ht, &iter); |
5b98a774 DG |
1650 | if (ret) { |
1651 | DBG3("Unregister app by PID %d failed. This can happen on pid reuse", | |
1652 | lta->pid); | |
1653 | } | |
852d0037 | 1654 | |
d42f20df DG |
1655 | /* Remove sessions so they are not visible during deletion.*/ |
1656 | cds_lfht_for_each_entry(lta->sessions->ht, &iter.iter, ua_sess, | |
1657 | node.node) { | |
1658 | ret = lttng_ht_del(lta->sessions, &iter); | |
1659 | if (ret) { | |
1660 | /* The session was already removed so scheduled for teardown. */ | |
1661 | continue; | |
1662 | } | |
1663 | ||
1664 | /* | |
1665 | * Add session to list for teardown. This is safe since at this point we | |
1666 | * are the only one using this list. | |
1667 | */ | |
1668 | cds_list_add(&ua_sess->teardown_node, <a->teardown_head); | |
1669 | } | |
1670 | ||
852d0037 DG |
1671 | /* Free memory */ |
1672 | call_rcu(<a->pid_n.head, delete_ust_app_rcu); | |
1673 | ||
284d8f55 | 1674 | error: |
5b4a0ec0 DG |
1675 | rcu_read_unlock(); |
1676 | return; | |
284d8f55 DG |
1677 | } |
1678 | ||
1679 | /* | |
5b4a0ec0 | 1680 | * Return traceable_app_count |
284d8f55 | 1681 | */ |
5b4a0ec0 | 1682 | unsigned long ust_app_list_count(void) |
284d8f55 | 1683 | { |
5b4a0ec0 | 1684 | unsigned long count; |
284d8f55 | 1685 | |
5b4a0ec0 | 1686 | rcu_read_lock(); |
bec39940 | 1687 | count = lttng_ht_get_count(ust_app_ht); |
5b4a0ec0 | 1688 | rcu_read_unlock(); |
284d8f55 | 1689 | |
5b4a0ec0 | 1690 | return count; |
284d8f55 DG |
1691 | } |
1692 | ||
5b4a0ec0 DG |
1693 | /* |
1694 | * Fill events array with all events name of all registered apps. | |
1695 | */ | |
1696 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1697 | { |
5b4a0ec0 DG |
1698 | int ret, handle; |
1699 | size_t nbmem, count = 0; | |
bec39940 | 1700 | struct lttng_ht_iter iter; |
5b4a0ec0 | 1701 | struct ust_app *app; |
c617c0c6 | 1702 | struct lttng_event *tmp_event; |
421cb601 | 1703 | |
5b4a0ec0 | 1704 | nbmem = UST_APP_EVENT_LIST_SIZE; |
c617c0c6 MD |
1705 | tmp_event = zmalloc(nbmem * sizeof(struct lttng_event)); |
1706 | if (tmp_event == NULL) { | |
5b4a0ec0 DG |
1707 | PERROR("zmalloc ust app events"); |
1708 | ret = -ENOMEM; | |
421cb601 DG |
1709 | goto error; |
1710 | } | |
1711 | ||
5b4a0ec0 | 1712 | rcu_read_lock(); |
421cb601 | 1713 | |
852d0037 | 1714 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
90eaa0d2 | 1715 | struct lttng_ust_tracepoint_iter uiter; |
ac3bd9c0 | 1716 | |
86acf0da DG |
1717 | health_code_update(&health_thread_cmd); |
1718 | ||
e0c7ec2b DG |
1719 | if (!app->compatible) { |
1720 | /* | |
1721 | * TODO: In time, we should notice the caller of this error by | |
1722 | * telling him that this is a version error. | |
1723 | */ | |
1724 | continue; | |
1725 | } | |
852d0037 | 1726 | handle = ustctl_tracepoint_list(app->sock); |
5b4a0ec0 DG |
1727 | if (handle < 0) { |
1728 | ERR("UST app list events getting handle failed for app pid %d", | |
852d0037 | 1729 | app->pid); |
5b4a0ec0 DG |
1730 | continue; |
1731 | } | |
421cb601 | 1732 | |
852d0037 | 1733 | while ((ret = ustctl_tracepoint_list_get(app->sock, handle, |
fb54cdbf | 1734 | &uiter)) != -LTTNG_UST_ERR_NOENT) { |
86acf0da | 1735 | health_code_update(&health_thread_cmd); |
815564d8 | 1736 | if (count >= nbmem) { |
d7b3776f | 1737 | /* In case the realloc fails, we free the memory */ |
c617c0c6 MD |
1738 | void *ptr; |
1739 | ||
815564d8 MD |
1740 | DBG2("Reallocating event list from %zu to %zu entries", nbmem, |
1741 | 2 * nbmem); | |
1742 | nbmem *= 2; | |
c617c0c6 MD |
1743 | ptr = realloc(tmp_event, nbmem * sizeof(struct lttng_event)); |
1744 | if (ptr == NULL) { | |
5b4a0ec0 | 1745 | PERROR("realloc ust app events"); |
c617c0c6 | 1746 | free(tmp_event); |
5b4a0ec0 DG |
1747 | ret = -ENOMEM; |
1748 | goto rcu_error; | |
1749 | } | |
c617c0c6 | 1750 | tmp_event = ptr; |
5b4a0ec0 | 1751 | } |
c617c0c6 MD |
1752 | memcpy(tmp_event[count].name, uiter.name, LTTNG_UST_SYM_NAME_LEN); |
1753 | tmp_event[count].loglevel = uiter.loglevel; | |
1754 | tmp_event[count].type = (enum lttng_event_type) LTTNG_UST_TRACEPOINT; | |
1755 | tmp_event[count].pid = app->pid; | |
1756 | tmp_event[count].enabled = -1; | |
5b4a0ec0 | 1757 | count++; |
421cb601 | 1758 | } |
421cb601 DG |
1759 | } |
1760 | ||
5b4a0ec0 | 1761 | ret = count; |
c617c0c6 | 1762 | *events = tmp_event; |
421cb601 | 1763 | |
5b4a0ec0 | 1764 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1765 | |
5b4a0ec0 DG |
1766 | rcu_error: |
1767 | rcu_read_unlock(); | |
421cb601 | 1768 | error: |
86acf0da | 1769 | health_code_update(&health_thread_cmd); |
5b4a0ec0 | 1770 | return ret; |
421cb601 DG |
1771 | } |
1772 | ||
f37d259d MD |
1773 | /* |
1774 | * Fill events array with all events name of all registered apps. | |
1775 | */ | |
1776 | int ust_app_list_event_fields(struct lttng_event_field **fields) | |
1777 | { | |
1778 | int ret, handle; | |
1779 | size_t nbmem, count = 0; | |
1780 | struct lttng_ht_iter iter; | |
1781 | struct ust_app *app; | |
c617c0c6 | 1782 | struct lttng_event_field *tmp_event; |
f37d259d MD |
1783 | |
1784 | nbmem = UST_APP_EVENT_LIST_SIZE; | |
c617c0c6 MD |
1785 | tmp_event = zmalloc(nbmem * sizeof(struct lttng_event_field)); |
1786 | if (tmp_event == NULL) { | |
f37d259d MD |
1787 | PERROR("zmalloc ust app event fields"); |
1788 | ret = -ENOMEM; | |
1789 | goto error; | |
1790 | } | |
1791 | ||
1792 | rcu_read_lock(); | |
1793 | ||
1794 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { | |
1795 | struct lttng_ust_field_iter uiter; | |
1796 | ||
86acf0da DG |
1797 | health_code_update(&health_thread_cmd); |
1798 | ||
f37d259d MD |
1799 | if (!app->compatible) { |
1800 | /* | |
1801 | * TODO: In time, we should notice the caller of this error by | |
1802 | * telling him that this is a version error. | |
1803 | */ | |
1804 | continue; | |
1805 | } | |
1806 | handle = ustctl_tracepoint_field_list(app->sock); | |
1807 | if (handle < 0) { | |
1808 | ERR("UST app list event fields getting handle failed for app pid %d", | |
1809 | app->pid); | |
1810 | continue; | |
1811 | } | |
1812 | ||
1813 | while ((ret = ustctl_tracepoint_field_list_get(app->sock, handle, | |
fb54cdbf | 1814 | &uiter)) != -LTTNG_UST_ERR_NOENT) { |
86acf0da | 1815 | health_code_update(&health_thread_cmd); |
f37d259d | 1816 | if (count >= nbmem) { |
d7b3776f | 1817 | /* In case the realloc fails, we free the memory */ |
c617c0c6 MD |
1818 | void *ptr; |
1819 | ||
f37d259d MD |
1820 | DBG2("Reallocating event field list from %zu to %zu entries", nbmem, |
1821 | 2 * nbmem); | |
1822 | nbmem *= 2; | |
c617c0c6 MD |
1823 | ptr = realloc(tmp_event, nbmem * sizeof(struct lttng_event_field)); |
1824 | if (ptr == NULL) { | |
f37d259d | 1825 | PERROR("realloc ust app event fields"); |
c617c0c6 | 1826 | free(tmp_event); |
f37d259d MD |
1827 | ret = -ENOMEM; |
1828 | goto rcu_error; | |
1829 | } | |
c617c0c6 | 1830 | tmp_event = ptr; |
f37d259d | 1831 | } |
f37d259d | 1832 | |
c617c0c6 MD |
1833 | memcpy(tmp_event[count].field_name, uiter.field_name, LTTNG_UST_SYM_NAME_LEN); |
1834 | tmp_event[count].type = uiter.type; | |
1835 | tmp_event[count].nowrite = uiter.nowrite; | |
f37d259d | 1836 | |
c617c0c6 MD |
1837 | memcpy(tmp_event[count].event.name, uiter.event_name, LTTNG_UST_SYM_NAME_LEN); |
1838 | tmp_event[count].event.loglevel = uiter.loglevel; | |
1839 | tmp_event[count].event.type = LTTNG_UST_TRACEPOINT; | |
1840 | tmp_event[count].event.pid = app->pid; | |
1841 | tmp_event[count].event.enabled = -1; | |
f37d259d MD |
1842 | count++; |
1843 | } | |
1844 | } | |
1845 | ||
1846 | ret = count; | |
c617c0c6 | 1847 | *fields = tmp_event; |
f37d259d MD |
1848 | |
1849 | DBG2("UST app list event fields done (%zu events)", count); | |
1850 | ||
1851 | rcu_error: | |
1852 | rcu_read_unlock(); | |
1853 | error: | |
86acf0da | 1854 | health_code_update(&health_thread_cmd); |
f37d259d MD |
1855 | return ret; |
1856 | } | |
1857 | ||
5b4a0ec0 DG |
1858 | /* |
1859 | * Free and clean all traceable apps of the global list. | |
1860 | */ | |
1861 | void ust_app_clean_list(void) | |
421cb601 | 1862 | { |
5b4a0ec0 | 1863 | int ret; |
659ed79f | 1864 | struct ust_app *app; |
bec39940 | 1865 | struct lttng_ht_iter iter; |
421cb601 | 1866 | |
5b4a0ec0 | 1867 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1868 | |
5b4a0ec0 | 1869 | rcu_read_lock(); |
421cb601 | 1870 | |
659ed79f | 1871 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
bec39940 | 1872 | ret = lttng_ht_del(ust_app_ht, &iter); |
525b0740 | 1873 | assert(!ret); |
659ed79f | 1874 | call_rcu(&app->pid_n.head, delete_ust_app_rcu); |
421cb601 DG |
1875 | } |
1876 | ||
852d0037 | 1877 | /* Cleanup socket hash table */ |
659ed79f DG |
1878 | cds_lfht_for_each_entry(ust_app_ht_by_sock->ht, &iter.iter, app, |
1879 | sock_n.node) { | |
852d0037 | 1880 | ret = lttng_ht_del(ust_app_ht_by_sock, &iter); |
bec39940 DG |
1881 | assert(!ret); |
1882 | } | |
852d0037 | 1883 | |
bec39940 | 1884 | /* Destroy is done only when the ht is empty */ |
852d0037 DG |
1885 | lttng_ht_destroy(ust_app_ht); |
1886 | lttng_ht_destroy(ust_app_ht_by_sock); | |
421cb601 | 1887 | |
5b4a0ec0 DG |
1888 | rcu_read_unlock(); |
1889 | } | |
1890 | ||
1891 | /* | |
1892 | * Init UST app hash table. | |
1893 | */ | |
1894 | void ust_app_ht_alloc(void) | |
1895 | { | |
bec39940 | 1896 | ust_app_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
852d0037 | 1897 | ust_app_ht_by_sock = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
421cb601 DG |
1898 | } |
1899 | ||
78f0bacd DG |
1900 | /* |
1901 | * For a specific UST session, disable the channel for all registered apps. | |
1902 | */ | |
35a9059d | 1903 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1904 | struct ltt_ust_channel *uchan) |
1905 | { | |
1906 | int ret = 0; | |
bec39940 DG |
1907 | struct lttng_ht_iter iter; |
1908 | struct lttng_ht_node_str *ua_chan_node; | |
78f0bacd DG |
1909 | struct ust_app *app; |
1910 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1911 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1912 | |
1913 | if (usess == NULL || uchan == NULL) { | |
1914 | ERR("Disabling UST global channel with NULL values"); | |
1915 | ret = -1; | |
1916 | goto error; | |
1917 | } | |
1918 | ||
a991f516 MD |
1919 | DBG2("UST app disabling channel %s from global domain for session id %d", |
1920 | uchan->name, usess->id); | |
78f0bacd DG |
1921 | |
1922 | rcu_read_lock(); | |
1923 | ||
1924 | /* For every registered applications */ | |
852d0037 | 1925 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
bec39940 | 1926 | struct lttng_ht_iter uiter; |
e0c7ec2b DG |
1927 | if (!app->compatible) { |
1928 | /* | |
1929 | * TODO: In time, we should notice the caller of this error by | |
1930 | * telling him that this is a version error. | |
1931 | */ | |
1932 | continue; | |
1933 | } | |
78f0bacd DG |
1934 | ua_sess = lookup_session_by_app(usess, app); |
1935 | if (ua_sess == NULL) { | |
1936 | continue; | |
1937 | } | |
1938 | ||
8535a6d9 | 1939 | /* Get channel */ |
bec39940 DG |
1940 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
1941 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
8535a6d9 DG |
1942 | /* If the session if found for the app, the channel must be there */ |
1943 | assert(ua_chan_node); | |
1944 | ||
1945 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1946 | /* The channel must not be already disabled */ | |
1947 | assert(ua_chan->enabled == 1); | |
1948 | ||
1949 | /* Disable channel onto application */ | |
1950 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1951 | if (ret < 0) { |
1952 | /* XXX: We might want to report this error at some point... */ | |
1953 | continue; | |
1954 | } | |
1955 | } | |
1956 | ||
1957 | rcu_read_unlock(); | |
1958 | ||
1959 | error: | |
1960 | return ret; | |
1961 | } | |
1962 | ||
1963 | /* | |
1964 | * For a specific UST session, enable the channel for all registered apps. | |
1965 | */ | |
35a9059d | 1966 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1967 | struct ltt_ust_channel *uchan) |
1968 | { | |
1969 | int ret = 0; | |
bec39940 | 1970 | struct lttng_ht_iter iter; |
78f0bacd DG |
1971 | struct ust_app *app; |
1972 | struct ust_app_session *ua_sess; | |
1973 | ||
1974 | if (usess == NULL || uchan == NULL) { | |
1975 | ERR("Adding UST global channel to NULL values"); | |
1976 | ret = -1; | |
1977 | goto error; | |
1978 | } | |
1979 | ||
a991f516 MD |
1980 | DBG2("UST app enabling channel %s to global domain for session id %d", |
1981 | uchan->name, usess->id); | |
78f0bacd DG |
1982 | |
1983 | rcu_read_lock(); | |
1984 | ||
1985 | /* For every registered applications */ | |
852d0037 | 1986 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
1987 | if (!app->compatible) { |
1988 | /* | |
1989 | * TODO: In time, we should notice the caller of this error by | |
1990 | * telling him that this is a version error. | |
1991 | */ | |
1992 | continue; | |
1993 | } | |
78f0bacd DG |
1994 | ua_sess = lookup_session_by_app(usess, app); |
1995 | if (ua_sess == NULL) { | |
1996 | continue; | |
1997 | } | |
1998 | ||
1999 | /* Enable channel onto application */ | |
2000 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
2001 | if (ret < 0) { | |
2002 | /* XXX: We might want to report this error at some point... */ | |
2003 | continue; | |
2004 | } | |
2005 | } | |
2006 | ||
2007 | rcu_read_unlock(); | |
2008 | ||
2009 | error: | |
2010 | return ret; | |
2011 | } | |
2012 | ||
b0a40d28 DG |
2013 | /* |
2014 | * Disable an event in a channel and for a specific session. | |
2015 | */ | |
35a9059d DG |
2016 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
2017 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
2018 | { |
2019 | int ret = 0; | |
bec39940 DG |
2020 | struct lttng_ht_iter iter, uiter; |
2021 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
b0a40d28 DG |
2022 | struct ust_app *app; |
2023 | struct ust_app_session *ua_sess; | |
2024 | struct ust_app_channel *ua_chan; | |
2025 | struct ust_app_event *ua_event; | |
2026 | ||
2027 | DBG("UST app disabling event %s for all apps in channel " | |
a991f516 | 2028 | "%s for session id %d", uevent->attr.name, uchan->name, usess->id); |
b0a40d28 DG |
2029 | |
2030 | rcu_read_lock(); | |
2031 | ||
2032 | /* For all registered applications */ | |
852d0037 | 2033 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2034 | if (!app->compatible) { |
2035 | /* | |
2036 | * TODO: In time, we should notice the caller of this error by | |
2037 | * telling him that this is a version error. | |
2038 | */ | |
2039 | continue; | |
2040 | } | |
b0a40d28 DG |
2041 | ua_sess = lookup_session_by_app(usess, app); |
2042 | if (ua_sess == NULL) { | |
2043 | /* Next app */ | |
2044 | continue; | |
2045 | } | |
2046 | ||
2047 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2048 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2049 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 | 2050 | if (ua_chan_node == NULL) { |
a991f516 | 2051 | DBG2("Channel %s not found in session id %d for app pid %d." |
852d0037 | 2052 | "Skipping", uchan->name, usess->id, app->pid); |
b0a40d28 DG |
2053 | continue; |
2054 | } | |
2055 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2056 | ||
bec39940 DG |
2057 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &uiter); |
2058 | ua_event_node = lttng_ht_iter_get_node_str(&uiter); | |
b0a40d28 DG |
2059 | if (ua_event_node == NULL) { |
2060 | DBG2("Event %s not found in channel %s for app pid %d." | |
852d0037 | 2061 | "Skipping", uevent->attr.name, uchan->name, app->pid); |
b0a40d28 DG |
2062 | continue; |
2063 | } | |
2064 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2065 | ||
7f79d3a1 | 2066 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
b0a40d28 DG |
2067 | if (ret < 0) { |
2068 | /* XXX: Report error someday... */ | |
2069 | continue; | |
2070 | } | |
2071 | } | |
2072 | ||
2073 | rcu_read_unlock(); | |
2074 | ||
2075 | return ret; | |
2076 | } | |
2077 | ||
9730260e | 2078 | /* |
edb67388 | 2079 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
2080 | * registered apps. |
2081 | */ | |
35a9059d | 2082 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
2083 | struct ltt_ust_channel *uchan) |
2084 | { | |
2085 | int ret = 0; | |
bec39940 DG |
2086 | struct lttng_ht_iter iter, uiter; |
2087 | struct lttng_ht_node_str *ua_chan_node; | |
9730260e DG |
2088 | struct ust_app *app; |
2089 | struct ust_app_session *ua_sess; | |
2090 | struct ust_app_channel *ua_chan; | |
2091 | struct ust_app_event *ua_event; | |
2092 | ||
2093 | DBG("UST app disabling all event for all apps in channel " | |
a991f516 | 2094 | "%s for session id %d", uchan->name, usess->id); |
9730260e DG |
2095 | |
2096 | rcu_read_lock(); | |
2097 | ||
2098 | /* For all registered applications */ | |
852d0037 | 2099 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2100 | if (!app->compatible) { |
2101 | /* | |
2102 | * TODO: In time, we should notice the caller of this error by | |
2103 | * telling him that this is a version error. | |
2104 | */ | |
2105 | continue; | |
2106 | } | |
9730260e | 2107 | ua_sess = lookup_session_by_app(usess, app); |
c4a1715b DG |
2108 | if (!ua_sess) { |
2109 | /* The application has problem or is probably dead. */ | |
2110 | continue; | |
2111 | } | |
9730260e DG |
2112 | |
2113 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2114 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2115 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
2116 | /* If the channel is not found, there is a code flow error */ |
2117 | assert(ua_chan_node); | |
2118 | ||
9730260e DG |
2119 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
2120 | ||
2121 | /* Disable each events of channel */ | |
bec39940 DG |
2122 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
2123 | node.node) { | |
7f79d3a1 | 2124 | ret = disable_ust_app_event(ua_sess, ua_event, app); |
9730260e DG |
2125 | if (ret < 0) { |
2126 | /* XXX: Report error someday... */ | |
2127 | continue; | |
2128 | } | |
2129 | } | |
2130 | } | |
2131 | ||
2132 | rcu_read_unlock(); | |
2133 | ||
2134 | return ret; | |
2135 | } | |
2136 | ||
421cb601 | 2137 | /* |
5b4a0ec0 | 2138 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 2139 | */ |
35a9059d | 2140 | int ust_app_create_channel_glb(struct ltt_ust_session *usess, |
48842b30 DG |
2141 | struct ltt_ust_channel *uchan) |
2142 | { | |
3d8ca23b | 2143 | int ret = 0, created; |
bec39940 | 2144 | struct lttng_ht_iter iter; |
48842b30 | 2145 | struct ust_app *app; |
3d8ca23b | 2146 | struct ust_app_session *ua_sess = NULL; |
48842b30 | 2147 | |
fc34caaa DG |
2148 | /* Very wrong code flow */ |
2149 | assert(usess); | |
2150 | assert(uchan); | |
421cb601 | 2151 | |
a991f516 MD |
2152 | DBG2("UST app adding channel %s to global domain for session id %d", |
2153 | uchan->name, usess->id); | |
48842b30 DG |
2154 | |
2155 | rcu_read_lock(); | |
421cb601 | 2156 | |
5b4a0ec0 | 2157 | /* For every registered applications */ |
852d0037 | 2158 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2159 | if (!app->compatible) { |
2160 | /* | |
2161 | * TODO: In time, we should notice the caller of this error by | |
2162 | * telling him that this is a version error. | |
2163 | */ | |
2164 | continue; | |
2165 | } | |
edb67388 DG |
2166 | /* |
2167 | * Create session on the tracer side and add it to app session HT. Note | |
2168 | * that if session exist, it will simply return a pointer to the ust | |
2169 | * app session. | |
2170 | */ | |
3d8ca23b DG |
2171 | ret = create_ust_app_session(usess, app, &ua_sess, &created); |
2172 | if (ret < 0) { | |
2173 | switch (ret) { | |
2174 | case -ENOTCONN: | |
2175 | /* | |
2176 | * The application's socket is not valid. Either a bad socket | |
2177 | * or a timeout on it. We can't inform the caller that for a | |
2178 | * specific app, the session failed so lets continue here. | |
2179 | */ | |
2180 | continue; | |
2181 | case -ENOMEM: | |
2182 | default: | |
2183 | goto error_rcu_unlock; | |
2184 | } | |
48842b30 | 2185 | } |
3d8ca23b | 2186 | assert(ua_sess); |
48842b30 | 2187 | |
4d710ac2 DG |
2188 | /* Create channel onto application. We don't need the chan ref. */ |
2189 | ret = create_ust_app_channel(ua_sess, uchan, app, NULL); | |
3d8ca23b DG |
2190 | if (ret < 0) { |
2191 | if (ret == -ENOMEM) { | |
2192 | /* No more memory is a fatal error. Stop right now. */ | |
2193 | goto error_rcu_unlock; | |
2194 | } | |
2195 | /* Cleanup the created session if it's the case. */ | |
2196 | if (created) { | |
2197 | delete_ust_app_session(app->sock, ua_sess); | |
2198 | } | |
48842b30 | 2199 | } |
48842b30 | 2200 | } |
5b4a0ec0 | 2201 | |
95e047ff | 2202 | error_rcu_unlock: |
48842b30 | 2203 | rcu_read_unlock(); |
3c14c33f | 2204 | return ret; |
48842b30 DG |
2205 | } |
2206 | ||
5b4a0ec0 | 2207 | /* |
edb67388 | 2208 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 2209 | */ |
35a9059d | 2210 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
2211 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
2212 | { | |
2213 | int ret = 0; | |
bec39940 | 2214 | struct lttng_ht_iter iter, uiter; |
18eace3b | 2215 | struct lttng_ht_node_str *ua_chan_node; |
48842b30 DG |
2216 | struct ust_app *app; |
2217 | struct ust_app_session *ua_sess; | |
2218 | struct ust_app_channel *ua_chan; | |
2219 | struct ust_app_event *ua_event; | |
48842b30 | 2220 | |
a991f516 MD |
2221 | DBG("UST app enabling event %s for all apps for session id %d", |
2222 | uevent->attr.name, usess->id); | |
48842b30 | 2223 | |
edb67388 DG |
2224 | /* |
2225 | * NOTE: At this point, this function is called only if the session and | |
2226 | * channel passed are already created for all apps. and enabled on the | |
2227 | * tracer also. | |
2228 | */ | |
2229 | ||
48842b30 | 2230 | rcu_read_lock(); |
421cb601 DG |
2231 | |
2232 | /* For all registered applications */ | |
852d0037 | 2233 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2234 | if (!app->compatible) { |
2235 | /* | |
2236 | * TODO: In time, we should notice the caller of this error by | |
2237 | * telling him that this is a version error. | |
2238 | */ | |
2239 | continue; | |
2240 | } | |
edb67388 | 2241 | ua_sess = lookup_session_by_app(usess, app); |
c4a1715b DG |
2242 | if (!ua_sess) { |
2243 | /* The application has problem or is probably dead. */ | |
2244 | continue; | |
2245 | } | |
ba767faf | 2246 | |
edb67388 | 2247 | /* Lookup channel in the ust app session */ |
bec39940 DG |
2248 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2249 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
2250 | /* If the channel is not found, there is a code flow error */ |
2251 | assert(ua_chan_node); | |
2252 | ||
2253 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2254 | ||
18eace3b DG |
2255 | /* Get event node */ |
2256 | ua_event = find_ust_app_event(ua_chan->events, uevent->attr.name, | |
2257 | uevent->filter, uevent->attr.loglevel); | |
2258 | if (ua_event == NULL) { | |
7f79d3a1 | 2259 | DBG3("UST app enable event %s not found for app PID %d." |
852d0037 | 2260 | "Skipping app", uevent->attr.name, app->pid); |
35a9059d DG |
2261 | continue; |
2262 | } | |
35a9059d DG |
2263 | |
2264 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
2265 | if (ret < 0) { | |
7f79d3a1 | 2266 | goto error; |
48842b30 | 2267 | } |
edb67388 DG |
2268 | } |
2269 | ||
7f79d3a1 | 2270 | error: |
edb67388 | 2271 | rcu_read_unlock(); |
edb67388 DG |
2272 | return ret; |
2273 | } | |
2274 | ||
2275 | /* | |
2276 | * For a specific existing UST session and UST channel, creates the event for | |
2277 | * all registered apps. | |
2278 | */ | |
35a9059d | 2279 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
2280 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
2281 | { | |
2282 | int ret = 0; | |
bec39940 DG |
2283 | struct lttng_ht_iter iter, uiter; |
2284 | struct lttng_ht_node_str *ua_chan_node; | |
edb67388 DG |
2285 | struct ust_app *app; |
2286 | struct ust_app_session *ua_sess; | |
2287 | struct ust_app_channel *ua_chan; | |
2288 | ||
a991f516 MD |
2289 | DBG("UST app creating event %s for all apps for session id %d", |
2290 | uevent->attr.name, usess->id); | |
edb67388 | 2291 | |
edb67388 DG |
2292 | rcu_read_lock(); |
2293 | ||
2294 | /* For all registered applications */ | |
852d0037 | 2295 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2296 | if (!app->compatible) { |
2297 | /* | |
2298 | * TODO: In time, we should notice the caller of this error by | |
2299 | * telling him that this is a version error. | |
2300 | */ | |
2301 | continue; | |
2302 | } | |
edb67388 | 2303 | ua_sess = lookup_session_by_app(usess, app); |
c4a1715b DG |
2304 | if (!ua_sess) { |
2305 | /* The application has problem or is probably dead. */ | |
2306 | continue; | |
2307 | } | |
48842b30 DG |
2308 | |
2309 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2310 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2311 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
edb67388 DG |
2312 | /* If the channel is not found, there is a code flow error */ |
2313 | assert(ua_chan_node); | |
2314 | ||
48842b30 DG |
2315 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
2316 | ||
edb67388 DG |
2317 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
2318 | if (ret < 0) { | |
49c336c1 | 2319 | if (ret != -LTTNG_UST_ERR_EXIST) { |
fc34caaa DG |
2320 | /* Possible value at this point: -ENOMEM. If so, we stop! */ |
2321 | break; | |
2322 | } | |
2323 | DBG2("UST app event %s already exist on app PID %d", | |
852d0037 | 2324 | uevent->attr.name, app->pid); |
5b4a0ec0 | 2325 | continue; |
48842b30 | 2326 | } |
48842b30 | 2327 | } |
5b4a0ec0 | 2328 | |
48842b30 DG |
2329 | rcu_read_unlock(); |
2330 | ||
2331 | return ret; | |
2332 | } | |
2333 | ||
5b4a0ec0 DG |
2334 | /* |
2335 | * Start tracing for a specific UST session and app. | |
2336 | */ | |
421cb601 | 2337 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
2338 | { |
2339 | int ret = 0; | |
bec39940 | 2340 | struct lttng_ht_iter iter; |
48842b30 DG |
2341 | struct ust_app_session *ua_sess; |
2342 | struct ust_app_channel *ua_chan; | |
030a66fa | 2343 | struct ust_app_stream *ustream; |
173af62f | 2344 | struct consumer_socket *socket; |
48842b30 | 2345 | |
852d0037 | 2346 | DBG("Starting tracing for ust app pid %d", app->pid); |
5cf5d0e7 | 2347 | |
509cbaf8 MD |
2348 | rcu_read_lock(); |
2349 | ||
e0c7ec2b DG |
2350 | if (!app->compatible) { |
2351 | goto end; | |
2352 | } | |
2353 | ||
421cb601 DG |
2354 | ua_sess = lookup_session_by_app(usess, app); |
2355 | if (ua_sess == NULL) { | |
d42f20df DG |
2356 | /* The session is in teardown process. Ignore and continue. */ |
2357 | goto end; | |
421cb601 | 2358 | } |
48842b30 | 2359 | |
aea829b3 DG |
2360 | /* Upon restart, we skip the setup, already done */ |
2361 | if (ua_sess->started) { | |
8be98f9a | 2362 | goto skip_setup; |
aea829b3 | 2363 | } |
8be98f9a | 2364 | |
a4b92340 DG |
2365 | /* Create directories if consumer is LOCAL and has a path defined. */ |
2366 | if (usess->consumer->type == CONSUMER_DST_LOCAL && | |
2367 | strlen(usess->consumer->dst.trace_path) > 0) { | |
2368 | ret = run_as_mkdir_recursive(usess->consumer->dst.trace_path, | |
2369 | S_IRWXU | S_IRWXG, usess->uid, usess->gid); | |
2370 | if (ret < 0) { | |
2371 | if (ret != -EEXIST) { | |
2372 | ERR("Trace directory creation error"); | |
2373 | ret = -1; | |
2374 | goto error_rcu_unlock; | |
2375 | } | |
2376 | } | |
2377 | } | |
2378 | ||
421cb601 DG |
2379 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
2380 | if (ret < 0) { | |
f73fabfd | 2381 | ret = LTTNG_ERR_UST_META_FAIL; |
509cbaf8 | 2382 | goto error_rcu_unlock; |
421cb601 | 2383 | } |
48842b30 | 2384 | |
421cb601 | 2385 | /* For each channel */ |
bec39940 DG |
2386 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2387 | node.node) { | |
421cb601 DG |
2388 | /* Create all streams */ |
2389 | while (1) { | |
5b4a0ec0 | 2390 | /* Create UST stream */ |
37f1c236 | 2391 | ustream = alloc_ust_app_stream(); |
421cb601 | 2392 | if (ustream == NULL) { |
509cbaf8 | 2393 | goto error_rcu_unlock; |
421cb601 | 2394 | } |
48842b30 | 2395 | |
86acf0da DG |
2396 | health_code_update(&health_thread_cmd); |
2397 | ||
4f3ab6ee | 2398 | ret = create_ust_stream(app, ua_chan, ustream); |
48842b30 | 2399 | if (ret < 0) { |
4f3ab6ee | 2400 | /* Free unused memory after this point. */ |
a2c0da86 | 2401 | free(ustream); |
495bbffb | 2402 | if (ret == -LTTNG_UST_ERR_NOENT) { |
5548a381 DG |
2403 | /* Got all streams. Continue normal execution. */ |
2404 | break; | |
2405 | } | |
2406 | /* Error at this point. Stop everything. */ | |
f73fabfd | 2407 | ret = LTTNG_ERR_UST_STREAM_FAIL; |
5548a381 | 2408 | goto error_rcu_unlock; |
48842b30 DG |
2409 | } |
2410 | ||
86acf0da DG |
2411 | health_code_update(&health_thread_cmd); |
2412 | ||
7f133705 | 2413 | /* Order is important this is why a list is used. */ |
421cb601 | 2414 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); |
c30aaa51 | 2415 | ua_chan->streams.count++; |
7f133705 | 2416 | |
00e2e675 DG |
2417 | DBG2("UST stream %d ready (handle: %d)", ua_chan->streams.count, |
2418 | ustream->handle); | |
421cb601 | 2419 | } |
86acf0da DG |
2420 | |
2421 | health_code_update(&health_thread_cmd); | |
421cb601 | 2422 | } |
aba8e916 | 2423 | |
7753dea8 MD |
2424 | switch (app->bits_per_long) { |
2425 | case 64: | |
173af62f DG |
2426 | socket = consumer_find_socket(uatomic_read(&ust_consumerd64_fd), |
2427 | usess->consumer); | |
2428 | if (socket == NULL) { | |
2429 | goto skip_setup; | |
2430 | } | |
7753dea8 MD |
2431 | break; |
2432 | case 32: | |
173af62f DG |
2433 | socket = consumer_find_socket(uatomic_read(&ust_consumerd32_fd), |
2434 | usess->consumer); | |
2435 | if (socket == NULL) { | |
2436 | goto skip_setup; | |
2437 | } | |
7753dea8 MD |
2438 | break; |
2439 | default: | |
2440 | ret = -EINVAL; | |
2441 | goto error_rcu_unlock; | |
2442 | } | |
aea829b3 | 2443 | |
421cb601 | 2444 | /* Setup UST consumer socket and send fds to it */ |
173af62f | 2445 | ret = ust_consumer_send_session(ua_sess, usess->consumer, socket); |
421cb601 | 2446 | if (ret < 0) { |
509cbaf8 | 2447 | goto error_rcu_unlock; |
421cb601 | 2448 | } |
48842b30 | 2449 | |
86acf0da DG |
2450 | health_code_update(&health_thread_cmd); |
2451 | ||
8be98f9a | 2452 | skip_setup: |
421cb601 | 2453 | /* This start the UST tracing */ |
852d0037 | 2454 | ret = ustctl_start_session(app->sock, ua_sess->handle); |
421cb601 | 2455 | if (ret < 0) { |
5c3c99d7 | 2456 | ERR("Error starting tracing for app pid: %d (ret: %d)", app->pid, ret); |
509cbaf8 | 2457 | goto error_rcu_unlock; |
421cb601 | 2458 | } |
5b4a0ec0 | 2459 | |
55c3953d DG |
2460 | /* Indicate that the session has been started once */ |
2461 | ua_sess->started = 1; | |
2462 | ||
86acf0da DG |
2463 | health_code_update(&health_thread_cmd); |
2464 | ||
421cb601 | 2465 | /* Quiescent wait after starting trace */ |
852d0037 | 2466 | ustctl_wait_quiescent(app->sock); |
48842b30 | 2467 | |
e0c7ec2b DG |
2468 | end: |
2469 | rcu_read_unlock(); | |
86acf0da | 2470 | health_code_update(&health_thread_cmd); |
421cb601 | 2471 | return 0; |
48842b30 | 2472 | |
509cbaf8 MD |
2473 | error_rcu_unlock: |
2474 | rcu_read_unlock(); | |
86acf0da | 2475 | health_code_update(&health_thread_cmd); |
421cb601 DG |
2476 | return -1; |
2477 | } | |
48842b30 | 2478 | |
8be98f9a MD |
2479 | /* |
2480 | * Stop tracing for a specific UST session and app. | |
2481 | */ | |
2482 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
2483 | { | |
2484 | int ret = 0; | |
bec39940 | 2485 | struct lttng_ht_iter iter; |
8be98f9a | 2486 | struct ust_app_session *ua_sess; |
6d3686da | 2487 | struct ust_app_channel *ua_chan; |
8be98f9a | 2488 | |
852d0037 | 2489 | DBG("Stopping tracing for ust app pid %d", app->pid); |
8be98f9a MD |
2490 | |
2491 | rcu_read_lock(); | |
2492 | ||
e0c7ec2b DG |
2493 | if (!app->compatible) { |
2494 | goto end; | |
2495 | } | |
2496 | ||
8be98f9a MD |
2497 | ua_sess = lookup_session_by_app(usess, app); |
2498 | if (ua_sess == NULL) { | |
d42f20df | 2499 | goto end; |
8be98f9a MD |
2500 | } |
2501 | ||
9bc07046 DG |
2502 | /* |
2503 | * If started = 0, it means that stop trace has been called for a session | |
c45536e1 DG |
2504 | * that was never started. It's possible since we can have a fail start |
2505 | * from either the application manager thread or the command thread. Simply | |
2506 | * indicate that this is a stop error. | |
9bc07046 | 2507 | */ |
f9dfc3d9 | 2508 | if (!ua_sess->started) { |
c45536e1 DG |
2509 | goto error_rcu_unlock; |
2510 | } | |
7db205b5 | 2511 | |
86acf0da DG |
2512 | health_code_update(&health_thread_cmd); |
2513 | ||
9d6c7d3f | 2514 | /* This inhibits UST tracing */ |
852d0037 | 2515 | ret = ustctl_stop_session(app->sock, ua_sess->handle); |
9d6c7d3f | 2516 | if (ret < 0) { |
5c3c99d7 | 2517 | ERR("Error stopping tracing for app pid: %d (ret: %d)", app->pid, ret); |
9d6c7d3f DG |
2518 | goto error_rcu_unlock; |
2519 | } | |
2520 | ||
86acf0da DG |
2521 | health_code_update(&health_thread_cmd); |
2522 | ||
9d6c7d3f | 2523 | /* Quiescent wait after stopping trace */ |
852d0037 | 2524 | ustctl_wait_quiescent(app->sock); |
9d6c7d3f | 2525 | |
86acf0da DG |
2526 | health_code_update(&health_thread_cmd); |
2527 | ||
9d6c7d3f | 2528 | /* Flushing buffers */ |
bec39940 DG |
2529 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2530 | node.node) { | |
86acf0da | 2531 | health_code_update(&health_thread_cmd); |
852d0037 | 2532 | ret = ustctl_sock_flush_buffer(app->sock, ua_chan->obj); |
8be98f9a | 2533 | if (ret < 0) { |
7db205b5 | 2534 | ERR("UST app PID %d channel %s flush failed with ret %d", |
852d0037 | 2535 | app->pid, ua_chan->name, ret); |
6d3686da DG |
2536 | /* Continuing flushing all buffers */ |
2537 | continue; | |
8be98f9a MD |
2538 | } |
2539 | } | |
8be98f9a | 2540 | |
86acf0da DG |
2541 | health_code_update(&health_thread_cmd); |
2542 | ||
90d97d10 | 2543 | /* Flush all buffers before stopping */ |
852d0037 | 2544 | ret = ustctl_sock_flush_buffer(app->sock, ua_sess->metadata->obj); |
90d97d10 | 2545 | if (ret < 0) { |
852d0037 | 2546 | ERR("UST app PID %d metadata flush failed with ret %d", app->pid, |
7db205b5 | 2547 | ret); |
90d97d10 DG |
2548 | } |
2549 | ||
7db205b5 DG |
2550 | end: |
2551 | rcu_read_unlock(); | |
86acf0da | 2552 | health_code_update(&health_thread_cmd); |
8be98f9a MD |
2553 | return 0; |
2554 | ||
2555 | error_rcu_unlock: | |
2556 | rcu_read_unlock(); | |
86acf0da | 2557 | health_code_update(&health_thread_cmd); |
8be98f9a MD |
2558 | return -1; |
2559 | } | |
2560 | ||
84cd17c6 MD |
2561 | /* |
2562 | * Destroy a specific UST session in apps. | |
2563 | */ | |
3353de95 | 2564 | static int destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) |
84cd17c6 MD |
2565 | { |
2566 | struct ust_app_session *ua_sess; | |
2567 | struct lttng_ust_object_data obj; | |
bec39940 DG |
2568 | struct lttng_ht_iter iter; |
2569 | struct lttng_ht_node_ulong *node; | |
525b0740 | 2570 | int ret; |
84cd17c6 | 2571 | |
852d0037 | 2572 | DBG("Destroy tracing for ust app pid %d", app->pid); |
84cd17c6 MD |
2573 | |
2574 | rcu_read_lock(); | |
2575 | ||
e0c7ec2b DG |
2576 | if (!app->compatible) { |
2577 | goto end; | |
2578 | } | |
2579 | ||
84cd17c6 | 2580 | __lookup_session_by_app(usess, app, &iter); |
bec39940 | 2581 | node = lttng_ht_iter_get_node_ulong(&iter); |
84cd17c6 | 2582 | if (node == NULL) { |
d42f20df DG |
2583 | /* Session is being or is deleted. */ |
2584 | goto end; | |
84cd17c6 MD |
2585 | } |
2586 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
bec39940 | 2587 | ret = lttng_ht_del(app->sessions, &iter); |
c4a1715b DG |
2588 | if (ret) { |
2589 | /* Already scheduled for teardown. */ | |
2590 | goto end; | |
2591 | } | |
2592 | ||
84cd17c6 MD |
2593 | obj.handle = ua_sess->handle; |
2594 | obj.shm_fd = -1; | |
2595 | obj.wait_fd = -1; | |
2596 | obj.memory_map_size = 0; | |
86acf0da | 2597 | health_code_update(&health_thread_cmd); |
852d0037 | 2598 | ustctl_release_object(app->sock, &obj); |
84cd17c6 | 2599 | |
86acf0da | 2600 | health_code_update(&health_thread_cmd); |
852d0037 | 2601 | delete_ust_app_session(app->sock, ua_sess); |
7db205b5 | 2602 | |
84cd17c6 | 2603 | /* Quiescent wait after stopping trace */ |
852d0037 | 2604 | ustctl_wait_quiescent(app->sock); |
84cd17c6 | 2605 | |
e0c7ec2b DG |
2606 | end: |
2607 | rcu_read_unlock(); | |
86acf0da | 2608 | health_code_update(&health_thread_cmd); |
84cd17c6 | 2609 | return 0; |
84cd17c6 MD |
2610 | } |
2611 | ||
5b4a0ec0 DG |
2612 | /* |
2613 | * Start tracing for the UST session. | |
2614 | */ | |
421cb601 DG |
2615 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
2616 | { | |
2617 | int ret = 0; | |
bec39940 | 2618 | struct lttng_ht_iter iter; |
421cb601 | 2619 | struct ust_app *app; |
48842b30 | 2620 | |
421cb601 DG |
2621 | DBG("Starting all UST traces"); |
2622 | ||
2623 | rcu_read_lock(); | |
421cb601 | 2624 | |
852d0037 | 2625 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
421cb601 | 2626 | ret = ust_app_start_trace(usess, app); |
48842b30 | 2627 | if (ret < 0) { |
5b4a0ec0 DG |
2628 | /* Continue to next apps even on error */ |
2629 | continue; | |
48842b30 | 2630 | } |
48842b30 | 2631 | } |
5b4a0ec0 | 2632 | |
48842b30 DG |
2633 | rcu_read_unlock(); |
2634 | ||
2635 | return 0; | |
2636 | } | |
487cf67c | 2637 | |
8be98f9a MD |
2638 | /* |
2639 | * Start tracing for the UST session. | |
2640 | */ | |
2641 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
2642 | { | |
2643 | int ret = 0; | |
bec39940 | 2644 | struct lttng_ht_iter iter; |
8be98f9a MD |
2645 | struct ust_app *app; |
2646 | ||
2647 | DBG("Stopping all UST traces"); | |
2648 | ||
2649 | rcu_read_lock(); | |
2650 | ||
852d0037 | 2651 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
8be98f9a MD |
2652 | ret = ust_app_stop_trace(usess, app); |
2653 | if (ret < 0) { | |
2654 | /* Continue to next apps even on error */ | |
2655 | continue; | |
2656 | } | |
2657 | } | |
2658 | ||
2659 | rcu_read_unlock(); | |
2660 | ||
2661 | return 0; | |
2662 | } | |
2663 | ||
84cd17c6 MD |
2664 | /* |
2665 | * Destroy app UST session. | |
2666 | */ | |
2667 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
2668 | { | |
2669 | int ret = 0; | |
bec39940 | 2670 | struct lttng_ht_iter iter; |
84cd17c6 MD |
2671 | struct ust_app *app; |
2672 | ||
2673 | DBG("Destroy all UST traces"); | |
2674 | ||
2675 | rcu_read_lock(); | |
2676 | ||
852d0037 | 2677 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
3353de95 | 2678 | ret = destroy_trace(usess, app); |
84cd17c6 MD |
2679 | if (ret < 0) { |
2680 | /* Continue to next apps even on error */ | |
2681 | continue; | |
2682 | } | |
2683 | } | |
2684 | ||
2685 | rcu_read_unlock(); | |
2686 | ||
2687 | return 0; | |
2688 | } | |
2689 | ||
5b4a0ec0 DG |
2690 | /* |
2691 | * Add channels/events from UST global domain to registered apps at sock. | |
2692 | */ | |
487cf67c DG |
2693 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
2694 | { | |
55c54cce | 2695 | int ret = 0; |
727d5404 | 2696 | struct lttng_ht_iter iter, uiter, iter_ctx; |
487cf67c | 2697 | struct ust_app *app; |
3d8ca23b | 2698 | struct ust_app_session *ua_sess = NULL; |
487cf67c DG |
2699 | struct ust_app_channel *ua_chan; |
2700 | struct ust_app_event *ua_event; | |
727d5404 | 2701 | struct ust_app_ctx *ua_ctx; |
1f3580c7 | 2702 | |
95e047ff | 2703 | assert(usess); |
1f3580c7 | 2704 | |
a991f516 MD |
2705 | DBG2("UST app global update for app sock %d for session id %d", sock, |
2706 | usess->id); | |
487cf67c | 2707 | |
284d8f55 DG |
2708 | rcu_read_lock(); |
2709 | ||
487cf67c DG |
2710 | app = find_app_by_sock(sock); |
2711 | if (app == NULL) { | |
2712 | ERR("Failed to update app sock %d", sock); | |
2713 | goto error; | |
2714 | } | |
2715 | ||
e0c7ec2b DG |
2716 | if (!app->compatible) { |
2717 | goto error; | |
2718 | } | |
2719 | ||
3d8ca23b DG |
2720 | ret = create_ust_app_session(usess, app, &ua_sess, NULL); |
2721 | if (ret < 0) { | |
2722 | /* Tracer is probably gone or ENOMEM. */ | |
487cf67c DG |
2723 | goto error; |
2724 | } | |
3d8ca23b | 2725 | assert(ua_sess); |
487cf67c | 2726 | |
284d8f55 DG |
2727 | /* |
2728 | * We can iterate safely here over all UST app session sicne the create ust | |
2729 | * app session above made a shadow copy of the UST global domain from the | |
2730 | * ltt ust session. | |
2731 | */ | |
bec39940 DG |
2732 | cds_lfht_for_each_entry(ua_sess->channels->ht, &iter.iter, ua_chan, |
2733 | node.node) { | |
284d8f55 DG |
2734 | ret = create_ust_channel(app, ua_sess, ua_chan); |
2735 | if (ret < 0) { | |
2736 | /* FIXME: Should we quit here or continue... */ | |
2737 | continue; | |
487cf67c DG |
2738 | } |
2739 | ||
727d5404 DG |
2740 | cds_lfht_for_each_entry(ua_chan->ctx->ht, &iter_ctx.iter, ua_ctx, |
2741 | node.node) { | |
2742 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
2743 | if (ret < 0) { | |
2744 | /* FIXME: Should we quit here or continue... */ | |
2745 | continue; | |
2746 | } | |
2747 | } | |
2748 | ||
2749 | ||
284d8f55 | 2750 | /* For each events */ |
bec39940 DG |
2751 | cds_lfht_for_each_entry(ua_chan->events->ht, &uiter.iter, ua_event, |
2752 | node.node) { | |
284d8f55 DG |
2753 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
2754 | if (ret < 0) { | |
2755 | /* FIXME: Should we quit here or continue... */ | |
2756 | continue; | |
487cf67c | 2757 | } |
36dc12cc | 2758 | } |
487cf67c DG |
2759 | } |
2760 | ||
36dc12cc | 2761 | if (usess->start_trace) { |
421cb601 | 2762 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 2763 | if (ret < 0) { |
36dc12cc DG |
2764 | goto error; |
2765 | } | |
2766 | ||
852d0037 | 2767 | DBG2("UST trace started for app pid %d", app->pid); |
36dc12cc DG |
2768 | } |
2769 | ||
487cf67c DG |
2770 | error: |
2771 | rcu_read_unlock(); | |
2772 | return; | |
2773 | } | |
55cc08a6 DG |
2774 | |
2775 | /* | |
2776 | * Add context to a specific channel for global UST domain. | |
2777 | */ | |
2778 | int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess, | |
2779 | struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx) | |
2780 | { | |
2781 | int ret = 0; | |
bec39940 DG |
2782 | struct lttng_ht_node_str *ua_chan_node; |
2783 | struct lttng_ht_iter iter, uiter; | |
55cc08a6 DG |
2784 | struct ust_app_channel *ua_chan = NULL; |
2785 | struct ust_app_session *ua_sess; | |
2786 | struct ust_app *app; | |
2787 | ||
2788 | rcu_read_lock(); | |
2789 | ||
852d0037 | 2790 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
e0c7ec2b DG |
2791 | if (!app->compatible) { |
2792 | /* | |
2793 | * TODO: In time, we should notice the caller of this error by | |
2794 | * telling him that this is a version error. | |
2795 | */ | |
2796 | continue; | |
2797 | } | |
55cc08a6 DG |
2798 | ua_sess = lookup_session_by_app(usess, app); |
2799 | if (ua_sess == NULL) { | |
2800 | continue; | |
2801 | } | |
2802 | ||
2803 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2804 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &uiter); |
2805 | ua_chan_node = lttng_ht_iter_get_node_str(&uiter); | |
55cc08a6 DG |
2806 | if (ua_chan_node == NULL) { |
2807 | continue; | |
2808 | } | |
2809 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2810 | node); | |
2811 | ||
2812 | ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app); | |
2813 | if (ret < 0) { | |
2814 | continue; | |
2815 | } | |
2816 | } | |
2817 | ||
55cc08a6 DG |
2818 | rcu_read_unlock(); |
2819 | return ret; | |
2820 | } | |
2821 | ||
76d45b40 DG |
2822 | /* |
2823 | * Enable event for a channel from a UST session for a specific PID. | |
2824 | */ | |
2825 | int ust_app_enable_event_pid(struct ltt_ust_session *usess, | |
2826 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2827 | { | |
2828 | int ret = 0; | |
bec39940 | 2829 | struct lttng_ht_iter iter; |
18eace3b | 2830 | struct lttng_ht_node_str *ua_chan_node; |
76d45b40 DG |
2831 | struct ust_app *app; |
2832 | struct ust_app_session *ua_sess; | |
2833 | struct ust_app_channel *ua_chan; | |
2834 | struct ust_app_event *ua_event; | |
2835 | ||
2836 | DBG("UST app enabling event %s for PID %d", uevent->attr.name, pid); | |
2837 | ||
2838 | rcu_read_lock(); | |
2839 | ||
2840 | app = ust_app_find_by_pid(pid); | |
2841 | if (app == NULL) { | |
2842 | ERR("UST app enable event per PID %d not found", pid); | |
2843 | ret = -1; | |
2844 | goto error; | |
2845 | } | |
2846 | ||
e0c7ec2b DG |
2847 | if (!app->compatible) { |
2848 | ret = 0; | |
2849 | goto error; | |
2850 | } | |
2851 | ||
76d45b40 | 2852 | ua_sess = lookup_session_by_app(usess, app); |
c4a1715b DG |
2853 | if (!ua_sess) { |
2854 | /* The application has problem or is probably dead. */ | |
2855 | goto error; | |
2856 | } | |
76d45b40 DG |
2857 | |
2858 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2859 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2860 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
76d45b40 DG |
2861 | /* If the channel is not found, there is a code flow error */ |
2862 | assert(ua_chan_node); | |
2863 | ||
2864 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2865 | ||
18eace3b DG |
2866 | ua_event = find_ust_app_event(ua_chan->events, uevent->attr.name, |
2867 | uevent->filter, uevent->attr.loglevel); | |
2868 | if (ua_event == NULL) { | |
76d45b40 DG |
2869 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
2870 | if (ret < 0) { | |
2871 | goto error; | |
2872 | } | |
2873 | } else { | |
76d45b40 DG |
2874 | ret = enable_ust_app_event(ua_sess, ua_event, app); |
2875 | if (ret < 0) { | |
2876 | goto error; | |
2877 | } | |
2878 | } | |
2879 | ||
2880 | error: | |
2881 | rcu_read_unlock(); | |
2882 | return ret; | |
2883 | } | |
7f79d3a1 DG |
2884 | |
2885 | /* | |
2886 | * Disable event for a channel from a UST session for a specific PID. | |
2887 | */ | |
2888 | int ust_app_disable_event_pid(struct ltt_ust_session *usess, | |
2889 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, pid_t pid) | |
2890 | { | |
2891 | int ret = 0; | |
bec39940 DG |
2892 | struct lttng_ht_iter iter; |
2893 | struct lttng_ht_node_str *ua_chan_node, *ua_event_node; | |
7f79d3a1 DG |
2894 | struct ust_app *app; |
2895 | struct ust_app_session *ua_sess; | |
2896 | struct ust_app_channel *ua_chan; | |
2897 | struct ust_app_event *ua_event; | |
2898 | ||
2899 | DBG("UST app disabling event %s for PID %d", uevent->attr.name, pid); | |
2900 | ||
2901 | rcu_read_lock(); | |
2902 | ||
2903 | app = ust_app_find_by_pid(pid); | |
2904 | if (app == NULL) { | |
2905 | ERR("UST app disable event per PID %d not found", pid); | |
2906 | ret = -1; | |
2907 | goto error; | |
2908 | } | |
2909 | ||
e0c7ec2b DG |
2910 | if (!app->compatible) { |
2911 | ret = 0; | |
2912 | goto error; | |
2913 | } | |
2914 | ||
7f79d3a1 | 2915 | ua_sess = lookup_session_by_app(usess, app); |
c4a1715b DG |
2916 | if (!ua_sess) { |
2917 | /* The application has problem or is probably dead. */ | |
2918 | goto error; | |
2919 | } | |
7f79d3a1 DG |
2920 | |
2921 | /* Lookup channel in the ust app session */ | |
bec39940 DG |
2922 | lttng_ht_lookup(ua_sess->channels, (void *)uchan->name, &iter); |
2923 | ua_chan_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2924 | if (ua_chan_node == NULL) { |
2925 | /* Channel does not exist, skip disabling */ | |
2926 | goto error; | |
2927 | } | |
2928 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
2929 | ||
bec39940 DG |
2930 | lttng_ht_lookup(ua_chan->events, (void *)uevent->attr.name, &iter); |
2931 | ua_event_node = lttng_ht_iter_get_node_str(&iter); | |
7f79d3a1 DG |
2932 | if (ua_event_node == NULL) { |
2933 | /* Event does not exist, skip disabling */ | |
2934 | goto error; | |
2935 | } | |
2936 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
2937 | ||
2938 | ret = disable_ust_app_event(ua_sess, ua_event, app); | |
2939 | if (ret < 0) { | |
2940 | goto error; | |
2941 | } | |
2942 | ||
2943 | error: | |
2944 | rcu_read_unlock(); | |
2945 | return ret; | |
2946 | } | |
e0c7ec2b DG |
2947 | |
2948 | /* | |
2949 | * Validate version of UST apps and set the compatible bit. | |
2950 | */ | |
2951 | int ust_app_validate_version(int sock) | |
2952 | { | |
2953 | int ret; | |
2954 | struct ust_app *app; | |
2955 | ||
2956 | rcu_read_lock(); | |
2957 | ||
2958 | app = find_app_by_sock(sock); | |
2959 | assert(app); | |
2960 | ||
86acf0da DG |
2961 | health_code_update(&health_thread_cmd); |
2962 | ||
e0c7ec2b DG |
2963 | ret = ustctl_tracer_version(sock, &app->version); |
2964 | if (ret < 0) { | |
2965 | goto error; | |
2966 | } | |
2967 | ||
2968 | /* Validate version */ | |
aee0cea0 | 2969 | if (app->version.major != UST_APP_MAJOR_VERSION) { |
e0c7ec2b DG |
2970 | goto error; |
2971 | } | |
2972 | ||
68264071 | 2973 | DBG2("UST app PID %d is compatible with internal major version %d " |
aee0cea0 | 2974 | "(supporting == %d)", app->pid, app->version.major, |
e0c7ec2b DG |
2975 | UST_APP_MAJOR_VERSION); |
2976 | app->compatible = 1; | |
2977 | rcu_read_unlock(); | |
86acf0da | 2978 | health_code_update(&health_thread_cmd); |
e0c7ec2b DG |
2979 | return 0; |
2980 | ||
2981 | error: | |
68264071 | 2982 | DBG2("UST app PID %d is not compatible with internal major version %d " |
aee0cea0 | 2983 | "(supporting == %d)", app->pid, app->version.major, |
e0c7ec2b DG |
2984 | UST_APP_MAJOR_VERSION); |
2985 | app->compatible = 0; | |
2986 | rcu_read_unlock(); | |
86acf0da | 2987 | health_code_update(&health_thread_cmd); |
e0c7ec2b DG |
2988 | return -1; |
2989 | } | |
4466912f DG |
2990 | |
2991 | /* | |
2992 | * Calibrate registered applications. | |
2993 | */ | |
2994 | int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate) | |
2995 | { | |
2996 | int ret = 0; | |
2997 | struct lttng_ht_iter iter; | |
2998 | struct ust_app *app; | |
2999 | ||
3000 | rcu_read_lock(); | |
3001 | ||
852d0037 | 3002 | cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) { |
4466912f DG |
3003 | if (!app->compatible) { |
3004 | /* | |
3005 | * TODO: In time, we should notice the caller of this error by | |
3006 | * telling him that this is a version error. | |
3007 | */ | |
3008 | continue; | |
3009 | } | |
3010 | ||
86acf0da DG |
3011 | health_code_update(&health_thread_cmd); |
3012 | ||
852d0037 | 3013 | ret = ustctl_calibrate(app->sock, calibrate); |
4466912f DG |
3014 | if (ret < 0) { |
3015 | switch (ret) { | |
3016 | case -ENOSYS: | |
3017 | /* Means that it's not implemented on the tracer side. */ | |
3018 | ret = 0; | |
3019 | break; | |
3020 | default: | |
3021 | /* TODO: Report error to user */ | |
3022 | DBG2("Calibrate app PID %d returned with error %d", | |
852d0037 | 3023 | app->pid, ret); |
4466912f DG |
3024 | break; |
3025 | } | |
3026 | } | |
3027 | } | |
3028 | ||
3029 | DBG("UST app global domain calibration finished"); | |
3030 | ||
3031 | rcu_read_unlock(); | |
3032 | ||
86acf0da DG |
3033 | health_code_update(&health_thread_cmd); |
3034 | ||
4466912f DG |
3035 | return ret; |
3036 | } |