Commit | Line | Data |
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91d76f53 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
82a3637f DG |
6 | * as published by the Free Software Foundation; only version 2 |
7 | * of the License. | |
91d76f53 DG |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <errno.h> | |
21 | #include <pthread.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
099e26bd | 24 | #include <string.h> |
aba8e916 DG |
25 | #include <sys/stat.h> |
26 | #include <sys/types.h> | |
099e26bd | 27 | #include <unistd.h> |
91d76f53 | 28 | |
0df502fd | 29 | #include <urcu/compiler.h> |
1e307fab | 30 | #include <lttngerr.h> |
48842b30 | 31 | #include <lttng-share.h> |
1e307fab | 32 | |
f6a9efaa | 33 | #include "hashtable.h" |
56fff090 | 34 | #include "ust-app.h" |
48842b30 | 35 | #include "ust-consumer.h" |
d80a6244 DG |
36 | #include "ust-ctl.h" |
37 | ||
55cc08a6 DG |
38 | /* |
39 | * Delete ust context safely. RCU read lock must be held before calling | |
40 | * this function. | |
41 | */ | |
42 | static | |
43 | void delete_ust_app_ctx(int sock, struct ust_app_ctx *ua_ctx) | |
44 | { | |
45 | if (ua_ctx->obj) { | |
46 | ustctl_release_object(sock, ua_ctx->obj); | |
47 | free(ua_ctx->obj); | |
48 | } | |
49 | free(ua_ctx); | |
50 | } | |
51 | ||
d80a6244 DG |
52 | /* |
53 | * Delete ust app event safely. RCU read lock must be held before calling | |
54 | * this function. | |
55 | */ | |
56 | static void delete_ust_app_event(int sock, struct ust_app_event *ua_event) | |
57 | { | |
55cc08a6 DG |
58 | int ret; |
59 | struct cds_lfht_iter iter; | |
60 | struct ust_app_ctx *ua_ctx; | |
61 | ||
62 | cds_lfht_for_each_entry(ua_event->ctx, &iter, ua_ctx, node) { | |
63 | ret = hashtable_del(ua_event->ctx, &iter); | |
64 | assert(!ret); | |
65 | delete_ust_app_ctx(sock, ua_ctx); | |
66 | } | |
67 | ret = hashtable_destroy(ua_event->ctx); | |
68 | assert(!ret); | |
d80a6244 | 69 | |
edb67388 DG |
70 | if (ua_event->obj != NULL) { |
71 | ustctl_release_object(sock, ua_event->obj); | |
72 | free(ua_event->obj); | |
73 | } | |
d80a6244 DG |
74 | free(ua_event); |
75 | } | |
76 | ||
77 | /* | |
78 | * Delete ust app stream safely. RCU read lock must be held before calling | |
79 | * this function. | |
80 | */ | |
81 | static void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream) | |
82 | { | |
84cd17c6 MD |
83 | ustctl_release_object(sock, stream->obj); |
84 | free(stream->obj); | |
85 | free(stream); | |
d80a6244 DG |
86 | } |
87 | ||
88 | /* | |
89 | * Delete ust app channel safely. RCU read lock must be held before calling | |
90 | * this function. | |
91 | */ | |
92 | static void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan) | |
93 | { | |
94 | int ret; | |
95 | struct cds_lfht_iter iter; | |
96 | struct ust_app_event *ua_event; | |
55cc08a6 | 97 | struct ust_app_ctx *ua_ctx; |
d80a6244 DG |
98 | struct ltt_ust_stream *stream, *stmp; |
99 | ||
55cc08a6 | 100 | /* Wipe stream */ |
d80a6244 | 101 | cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) { |
84cd17c6 | 102 | cds_list_del(&stream->list); |
d80a6244 DG |
103 | delete_ust_app_stream(sock, stream); |
104 | } | |
105 | ||
55cc08a6 DG |
106 | /* Wipe context */ |
107 | cds_lfht_for_each_entry(ua_chan->ctx, &iter, ua_ctx, node) { | |
108 | ret = hashtable_del(ua_chan->ctx, &iter); | |
109 | assert(!ret); | |
110 | delete_ust_app_ctx(sock, ua_ctx); | |
111 | } | |
112 | ret = hashtable_destroy(ua_chan->ctx); | |
113 | assert(!ret); | |
d80a6244 | 114 | |
55cc08a6 | 115 | /* Wipe events */ |
d80a6244 | 116 | cds_lfht_for_each_entry(ua_chan->events, &iter, ua_event, node) { |
525b0740 MD |
117 | ret = hashtable_del(ua_chan->events, &iter); |
118 | assert(!ret); | |
d80a6244 DG |
119 | delete_ust_app_event(sock, ua_event); |
120 | } | |
d80a6244 | 121 | ret = hashtable_destroy(ua_chan->events); |
55cc08a6 | 122 | assert(!ret); |
edb67388 DG |
123 | |
124 | if (ua_chan->obj != NULL) { | |
125 | ustctl_release_object(sock, ua_chan->obj); | |
126 | free(ua_chan->obj); | |
127 | } | |
84cd17c6 | 128 | free(ua_chan); |
d80a6244 DG |
129 | } |
130 | ||
131 | /* | |
132 | * Delete ust app session safely. RCU read lock must be held before calling | |
133 | * this function. | |
134 | */ | |
135 | static void delete_ust_app_session(int sock, | |
136 | struct ust_app_session *ua_sess) | |
137 | { | |
138 | int ret; | |
139 | struct cds_lfht_iter iter; | |
140 | struct ust_app_channel *ua_chan; | |
141 | ||
142 | if (ua_sess->metadata) { | |
84cd17c6 MD |
143 | ustctl_release_object(sock, ua_sess->metadata->stream_obj); |
144 | free(ua_sess->metadata->stream_obj); | |
145 | ustctl_release_object(sock, ua_sess->metadata->obj); | |
146 | free(ua_sess->metadata->obj); | |
d80a6244 DG |
147 | } |
148 | ||
149 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { | |
525b0740 MD |
150 | ret = hashtable_del(ua_sess->channels, &iter); |
151 | assert(!ret); | |
d80a6244 DG |
152 | delete_ust_app_channel(sock, ua_chan); |
153 | } | |
154 | ||
155 | ret = hashtable_destroy(ua_sess->channels); | |
156 | if (ret < 0) { | |
157 | ERR("UST app destroy session hashtable failed"); | |
158 | goto error; | |
159 | } | |
160 | ||
161 | error: | |
162 | return; | |
163 | } | |
91d76f53 DG |
164 | |
165 | /* | |
284d8f55 DG |
166 | * Delete a traceable application structure from the global list. Never call |
167 | * this function outside of a call_rcu call. | |
91d76f53 | 168 | */ |
284d8f55 | 169 | static void delete_ust_app(struct ust_app *app) |
91d76f53 | 170 | { |
f6a9efaa DG |
171 | int ret; |
172 | struct cds_lfht_node *node; | |
173 | struct cds_lfht_iter iter; | |
284d8f55 | 174 | struct ust_app_session *ua_sess; |
6414a713 | 175 | int sock; |
44d3bd01 | 176 | |
f6a9efaa | 177 | rcu_read_lock(); |
44d3bd01 | 178 | |
f6a9efaa DG |
179 | /* Remove from key hash table */ |
180 | node = hashtable_lookup(ust_app_sock_key_map, | |
284d8f55 | 181 | (void *) ((unsigned long) app->key.sock), sizeof(void *), &iter); |
f6a9efaa | 182 | if (node == NULL) { |
284d8f55 DG |
183 | /* Not suppose to happen */ |
184 | ERR("UST app key %d not found in key hash table", app->key.sock); | |
d80a6244 | 185 | goto end; |
284d8f55 DG |
186 | } |
187 | ||
188 | ret = hashtable_del(ust_app_sock_key_map, &iter); | |
189 | if (ret) { | |
190 | ERR("UST app unable to delete app sock %d from key hash table", | |
191 | app->key.sock); | |
f6a9efaa | 192 | } else { |
284d8f55 DG |
193 | DBG2("UST app pair sock %d key %d deleted", |
194 | app->key.sock, app->key.pid); | |
f6a9efaa DG |
195 | } |
196 | ||
d80a6244 DG |
197 | /* Socket is already closed at this point */ |
198 | ||
199 | /* Delete ust app sessions info */ | |
6414a713 MD |
200 | sock = app->key.sock; |
201 | app->key.sock = -1; | |
d80a6244 | 202 | |
284d8f55 | 203 | cds_lfht_for_each_entry(app->sessions, &iter, ua_sess, node) { |
525b0740 MD |
204 | ret = hashtable_del(app->sessions, &iter); |
205 | assert(!ret); | |
284d8f55 | 206 | delete_ust_app_session(app->key.sock, ua_sess); |
d80a6244 | 207 | } |
f6a9efaa | 208 | |
284d8f55 | 209 | ret = hashtable_destroy(app->sessions); |
d80a6244 DG |
210 | if (ret < 0) { |
211 | ERR("UST app destroy session hashtable failed"); | |
212 | goto end; | |
213 | } | |
214 | ||
6414a713 MD |
215 | /* |
216 | * Wait until we have removed the key from the sock hash table | |
217 | * before closing this socket, otherwise an application could | |
218 | * re-use the socket ID and race with the teardown, using the | |
219 | * same hash table entry. | |
220 | */ | |
221 | close(sock); | |
d80a6244 | 222 | |
284d8f55 DG |
223 | DBG2("UST app pid %d deleted", app->key.pid); |
224 | free(app); | |
d80a6244 | 225 | end: |
f6a9efaa | 226 | rcu_read_unlock(); |
099e26bd DG |
227 | } |
228 | ||
229 | /* | |
f6a9efaa | 230 | * URCU intermediate call to delete an UST app. |
099e26bd | 231 | */ |
f6a9efaa | 232 | static void delete_ust_app_rcu(struct rcu_head *head) |
099e26bd | 233 | { |
f6a9efaa DG |
234 | struct cds_lfht_node *node = |
235 | caa_container_of(head, struct cds_lfht_node, head); | |
236 | struct ust_app *app = | |
237 | caa_container_of(node, struct ust_app, node); | |
238 | ||
239 | delete_ust_app(app); | |
099e26bd DG |
240 | } |
241 | ||
242 | /* | |
421cb601 DG |
243 | * Find an ust_app using the sock and return it. RCU read side lock must be |
244 | * held before calling this helper function. | |
099e26bd | 245 | */ |
f6a9efaa | 246 | static struct ust_app *find_app_by_sock(int sock) |
099e26bd | 247 | { |
f6a9efaa DG |
248 | struct cds_lfht_node *node; |
249 | struct ust_app_key *key; | |
250 | struct cds_lfht_iter iter; | |
f6a9efaa | 251 | |
f6a9efaa DG |
252 | node = hashtable_lookup(ust_app_sock_key_map, |
253 | (void *)((unsigned long) sock), sizeof(void *), &iter); | |
254 | if (node == NULL) { | |
255 | DBG2("UST app find by sock %d key not found", sock); | |
f6a9efaa DG |
256 | goto error; |
257 | } | |
258 | ||
259 | key = caa_container_of(node, struct ust_app_key, node); | |
260 | ||
261 | node = hashtable_lookup(ust_app_ht, | |
262 | (void *)((unsigned long) key->pid), sizeof(void *), &iter); | |
263 | if (node == NULL) { | |
264 | DBG2("UST app find by sock %d not found", sock); | |
f6a9efaa DG |
265 | goto error; |
266 | } | |
f6a9efaa DG |
267 | return caa_container_of(node, struct ust_app, node); |
268 | ||
269 | error: | |
270 | return NULL; | |
099e26bd DG |
271 | } |
272 | ||
55cc08a6 DG |
273 | /* |
274 | * Create the channel context on the tracer. | |
275 | */ | |
276 | static | |
277 | int create_ust_channel_context(struct ust_app_channel *ua_chan, | |
278 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
279 | { | |
280 | int ret; | |
281 | ||
282 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
283 | ua_chan->obj, &ua_ctx->obj); | |
284 | if (ret < 0) { | |
285 | goto error; | |
286 | } | |
287 | ||
288 | ua_ctx->handle = ua_ctx->obj->handle; | |
289 | ||
290 | DBG2("UST app context added to channel %s successfully", ua_chan->name); | |
291 | ||
292 | error: | |
293 | return ret; | |
294 | } | |
295 | ||
296 | /* | |
297 | * Create the event context on the tracer. | |
298 | */ | |
299 | static | |
300 | int create_ust_event_context(struct ust_app_event *ua_event, | |
301 | struct ust_app_ctx *ua_ctx, struct ust_app *app) | |
302 | { | |
303 | int ret; | |
304 | ||
305 | ret = ustctl_add_context(app->key.sock, &ua_ctx->ctx, | |
306 | ua_event->obj, &ua_ctx->obj); | |
307 | if (ret < 0) { | |
308 | goto error; | |
309 | } | |
310 | ||
311 | ua_ctx->handle = ua_ctx->obj->handle; | |
312 | ||
313 | DBG2("UST app context added to event %s successfully", ua_event->name); | |
314 | ||
315 | error: | |
316 | return ret; | |
317 | } | |
318 | ||
9730260e DG |
319 | /* |
320 | * Disable the specified event on to UST tracer for the UST session. | |
321 | */ | |
322 | static int disable_ust_event(struct ust_app *app, | |
323 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
324 | { | |
325 | int ret; | |
326 | ||
327 | ret = ustctl_disable(app->key.sock, ua_event->obj); | |
328 | if (ret < 0) { | |
329 | ERR("UST app event %s disable failed for app (pid: %d) " | |
330 | "and session handle %d with ret %d", | |
331 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
332 | goto error; | |
333 | } | |
334 | ||
335 | DBG2("UST app event %s disabled successfully for app (pid: %d)", | |
336 | ua_event->attr.name, app->key.pid); | |
337 | ||
338 | error: | |
339 | return ret; | |
340 | } | |
341 | ||
78f0bacd DG |
342 | /* |
343 | * Disable the specified channel on to UST tracer for the UST session. | |
344 | */ | |
345 | static int disable_ust_channel(struct ust_app *app, | |
346 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
347 | { | |
348 | int ret; | |
349 | ||
350 | ret = ustctl_disable(app->key.sock, ua_chan->obj); | |
351 | if (ret < 0) { | |
352 | ERR("UST app channel %s disable failed for app (pid: %d) " | |
353 | "and session handle %d with ret %d", | |
354 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
355 | goto error; | |
356 | } | |
357 | ||
78f0bacd DG |
358 | DBG2("UST app channel %s disabled successfully for app (pid: %d)", |
359 | ua_chan->name, app->key.pid); | |
360 | ||
361 | error: | |
362 | return ret; | |
363 | } | |
364 | ||
365 | /* | |
366 | * Enable the specified channel on to UST tracer for the UST session. | |
367 | */ | |
368 | static int enable_ust_channel(struct ust_app *app, | |
369 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
370 | { | |
371 | int ret; | |
372 | ||
373 | ret = ustctl_enable(app->key.sock, ua_chan->obj); | |
374 | if (ret < 0) { | |
375 | ERR("UST app channel %s enable failed for app (pid: %d) " | |
376 | "and session handle %d with ret %d", | |
377 | ua_chan->name, app->key.pid, ua_sess->handle, ret); | |
378 | goto error; | |
379 | } | |
380 | ||
381 | ua_chan->enabled = 1; | |
382 | ||
383 | DBG2("UST app channel %s enabled successfully for app (pid: %d)", | |
384 | ua_chan->name, app->key.pid); | |
385 | ||
386 | error: | |
387 | return ret; | |
388 | } | |
389 | ||
edb67388 DG |
390 | /* |
391 | * Enable the specified event on to UST tracer for the UST session. | |
392 | */ | |
393 | static int enable_ust_event(struct ust_app *app, | |
394 | struct ust_app_session *ua_sess, struct ust_app_event *ua_event) | |
395 | { | |
396 | int ret; | |
397 | ||
398 | ret = ustctl_enable(app->key.sock, ua_event->obj); | |
399 | if (ret < 0) { | |
400 | ERR("UST app event %s enable failed for app (pid: %d) " | |
401 | "and session handle %d with ret %d", | |
402 | ua_event->attr.name, app->key.pid, ua_sess->handle, ret); | |
403 | goto error; | |
404 | } | |
405 | ||
406 | DBG2("UST app event %s enabled successfully for app (pid: %d)", | |
407 | ua_event->attr.name, app->key.pid); | |
408 | ||
409 | error: | |
410 | return ret; | |
411 | } | |
412 | ||
099e26bd | 413 | /* |
5b4a0ec0 | 414 | * Open metadata onto the UST tracer for a UST session. |
0177d773 | 415 | */ |
5b4a0ec0 DG |
416 | static int open_ust_metadata(struct ust_app *app, |
417 | struct ust_app_session *ua_sess) | |
0177d773 | 418 | { |
5b4a0ec0 DG |
419 | int ret; |
420 | struct lttng_ust_channel_attr uattr; | |
0177d773 | 421 | |
5b4a0ec0 DG |
422 | uattr.overwrite = ua_sess->metadata->attr.overwrite; |
423 | uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size; | |
424 | uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf; | |
425 | uattr.switch_timer_interval = | |
426 | ua_sess->metadata->attr.switch_timer_interval; | |
427 | uattr.read_timer_interval = | |
428 | ua_sess->metadata->attr.read_timer_interval; | |
429 | uattr.output = ua_sess->metadata->attr.output; | |
430 | ||
431 | /* UST tracer metadata creation */ | |
432 | ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr, | |
433 | &ua_sess->metadata->obj); | |
434 | if (ret < 0) { | |
435 | ERR("UST app open metadata failed for app pid:%d", | |
436 | app->key.pid); | |
f6a9efaa | 437 | goto error; |
0177d773 | 438 | } |
f6a9efaa DG |
439 | |
440 | error: | |
5b4a0ec0 | 441 | return ret; |
91d76f53 DG |
442 | } |
443 | ||
444 | /* | |
5b4a0ec0 | 445 | * Create stream onto the UST tracer for a UST session. |
91d76f53 | 446 | */ |
5b4a0ec0 DG |
447 | static int create_ust_stream(struct ust_app *app, |
448 | struct ust_app_session *ua_sess) | |
91d76f53 | 449 | { |
5b4a0ec0 | 450 | int ret; |
421cb601 | 451 | |
5b4a0ec0 DG |
452 | ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj, |
453 | &ua_sess->metadata->stream_obj); | |
454 | if (ret < 0) { | |
455 | ERR("UST create metadata stream failed"); | |
421cb601 | 456 | goto error; |
91d76f53 | 457 | } |
421cb601 | 458 | |
421cb601 | 459 | error: |
5b4a0ec0 | 460 | return ret; |
91d76f53 DG |
461 | } |
462 | ||
b551a063 | 463 | /* |
5b4a0ec0 | 464 | * Create the specified channel onto the UST tracer for a UST session. |
b551a063 | 465 | */ |
5b4a0ec0 DG |
466 | static int create_ust_channel(struct ust_app *app, |
467 | struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan) | |
b551a063 | 468 | { |
5b4a0ec0 | 469 | int ret; |
b551a063 | 470 | |
5b4a0ec0 DG |
471 | /* TODO: remove cast and use lttng-ust-abi.h */ |
472 | ret = ustctl_create_channel(app->key.sock, ua_sess->handle, | |
473 | (struct lttng_ust_channel_attr *)&ua_chan->attr, &ua_chan->obj); | |
474 | if (ret < 0) { | |
475 | DBG("Error creating channel %s for app (pid: %d, sock: %d) " | |
476 | "and session handle %d with ret %d", | |
477 | ua_chan->name, app->key.pid, app->key.sock, | |
478 | ua_sess->handle, ret); | |
b551a063 DG |
479 | goto error; |
480 | } | |
481 | ||
5b4a0ec0 DG |
482 | ua_chan->handle = ua_chan->obj->handle; |
483 | ua_chan->attr.shm_fd = ua_chan->obj->shm_fd; | |
484 | ua_chan->attr.wait_fd = ua_chan->obj->wait_fd; | |
485 | ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size; | |
b551a063 | 486 | |
5b4a0ec0 DG |
487 | DBG2("UST app channel %s created successfully for pid:%d and sock:%d", |
488 | ua_chan->name, app->key.pid, app->key.sock); | |
b551a063 | 489 | |
8535a6d9 DG |
490 | /* If channel is not enabled, disable it on the tracer */ |
491 | if (!ua_chan->enabled) { | |
492 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
493 | if (ret < 0) { | |
494 | goto error; | |
495 | } | |
496 | } | |
497 | ||
b551a063 DG |
498 | error: |
499 | return ret; | |
500 | } | |
501 | ||
91d76f53 | 502 | /* |
5b4a0ec0 | 503 | * Create the specified event onto the UST tracer for a UST session. |
91d76f53 | 504 | */ |
edb67388 DG |
505 | static |
506 | int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess, | |
507 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event) | |
91d76f53 | 508 | { |
5b4a0ec0 | 509 | int ret = 0; |
284d8f55 | 510 | |
5b4a0ec0 DG |
511 | /* Create UST event on tracer */ |
512 | ret = ustctl_create_event(app->key.sock, &ua_event->attr, ua_chan->obj, | |
513 | &ua_event->obj); | |
514 | if (ret < 0) { | |
515 | ERR("Error ustctl create event %s for app pid: %d with ret %d", | |
516 | ua_event->attr.name, app->key.pid, ret); | |
517 | goto error; | |
91d76f53 | 518 | } |
f6a9efaa | 519 | |
5b4a0ec0 | 520 | ua_event->handle = ua_event->obj->handle; |
284d8f55 | 521 | |
5b4a0ec0 DG |
522 | DBG2("UST app event %s created successfully for pid:%d", |
523 | ua_event->attr.name, app->key.pid); | |
f6a9efaa | 524 | |
8535a6d9 DG |
525 | /* If event not enabled, disable it on the tracer */ |
526 | if (!ua_event->enabled) { | |
527 | ret = disable_ust_event(app, ua_sess, ua_event); | |
528 | if (ret < 0) { | |
529 | goto error; | |
530 | } | |
531 | } | |
532 | ||
5b4a0ec0 DG |
533 | error: |
534 | return ret; | |
91d76f53 | 535 | } |
48842b30 DG |
536 | |
537 | /* | |
538 | * Alloc new UST app session. | |
539 | */ | |
421cb601 | 540 | static struct ust_app_session *alloc_ust_app_session(void) |
48842b30 DG |
541 | { |
542 | struct ust_app_session *ua_sess; | |
543 | ||
421cb601 | 544 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
545 | ua_sess = zmalloc(sizeof(struct ust_app_session)); |
546 | if (ua_sess == NULL) { | |
547 | PERROR("malloc"); | |
548 | goto error; | |
549 | } | |
550 | ||
48842b30 DG |
551 | ua_sess->handle = -1; |
552 | ua_sess->channels = hashtable_new_str(0); | |
48842b30 DG |
553 | |
554 | return ua_sess; | |
555 | ||
556 | error: | |
557 | return NULL; | |
558 | } | |
559 | ||
421cb601 DG |
560 | /* |
561 | * Alloc new UST app channel. | |
562 | */ | |
284d8f55 DG |
563 | static struct ust_app_channel *alloc_ust_app_channel(char *name, |
564 | struct lttng_ust_channel *attr) | |
48842b30 DG |
565 | { |
566 | struct ust_app_channel *ua_chan; | |
567 | ||
421cb601 | 568 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
569 | ua_chan = zmalloc(sizeof(struct ust_app_channel)); |
570 | if (ua_chan == NULL) { | |
571 | PERROR("malloc"); | |
572 | goto error; | |
573 | } | |
574 | ||
284d8f55 | 575 | /* Setup channel name */ |
48842b30 DG |
576 | strncpy(ua_chan->name, name, sizeof(ua_chan->name)); |
577 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
284d8f55 | 578 | |
8535a6d9 | 579 | ua_chan->enabled = 1; |
48842b30 | 580 | ua_chan->handle = -1; |
48842b30 | 581 | ua_chan->ctx = hashtable_new(0); |
48842b30 DG |
582 | ua_chan->events = hashtable_new_str(0); |
583 | hashtable_node_init(&ua_chan->node, (void *) ua_chan->name, | |
584 | strlen(ua_chan->name)); | |
585 | ||
284d8f55 DG |
586 | CDS_INIT_LIST_HEAD(&ua_chan->streams.head); |
587 | ||
588 | /* Copy attributes */ | |
589 | if (attr) { | |
590 | memcpy(&ua_chan->attr, attr, sizeof(ua_chan->attr)); | |
591 | } | |
592 | ||
48842b30 DG |
593 | DBG3("UST app channel %s allocated", ua_chan->name); |
594 | ||
595 | return ua_chan; | |
596 | ||
597 | error: | |
598 | return NULL; | |
599 | } | |
600 | ||
421cb601 DG |
601 | /* |
602 | * Alloc new UST app event. | |
603 | */ | |
284d8f55 DG |
604 | static struct ust_app_event *alloc_ust_app_event(char *name, |
605 | struct lttng_ust_event *attr) | |
48842b30 DG |
606 | { |
607 | struct ust_app_event *ua_event; | |
608 | ||
421cb601 | 609 | /* Init most of the default value by allocating and zeroing */ |
48842b30 DG |
610 | ua_event = zmalloc(sizeof(struct ust_app_event)); |
611 | if (ua_event == NULL) { | |
612 | PERROR("malloc"); | |
613 | goto error; | |
614 | } | |
615 | ||
8535a6d9 | 616 | ua_event->enabled = 1; |
48842b30 DG |
617 | strncpy(ua_event->name, name, sizeof(ua_event->name)); |
618 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
619 | ua_event->ctx = hashtable_new(0); | |
620 | hashtable_node_init(&ua_event->node, (void *) ua_event->name, | |
621 | strlen(ua_event->name)); | |
622 | ||
284d8f55 DG |
623 | /* Copy attributes */ |
624 | if (attr) { | |
625 | memcpy(&ua_event->attr, attr, sizeof(ua_event->attr)); | |
626 | } | |
627 | ||
48842b30 DG |
628 | DBG3("UST app event %s allocated", ua_event->name); |
629 | ||
630 | return ua_event; | |
631 | ||
632 | error: | |
633 | return NULL; | |
634 | } | |
635 | ||
55cc08a6 DG |
636 | /* |
637 | * Alloc new UST app context. | |
638 | */ | |
639 | static | |
640 | struct ust_app_ctx *alloc_ust_app_ctx(struct lttng_ust_context *uctx) | |
641 | { | |
642 | struct ust_app_ctx *ua_ctx; | |
643 | ||
644 | ua_ctx = zmalloc(sizeof(struct ust_app_ctx)); | |
645 | if (ua_ctx == NULL) { | |
646 | goto error; | |
647 | } | |
648 | ||
649 | if (uctx) { | |
650 | memcpy(&ua_ctx->ctx, uctx, sizeof(ua_ctx->ctx)); | |
651 | } | |
652 | ||
653 | DBG3("UST app context %d allocated", ua_ctx->ctx.ctx); | |
654 | ||
655 | error: | |
656 | return ua_ctx; | |
657 | } | |
658 | ||
5b4a0ec0 DG |
659 | /* |
660 | * Copy data between an UST app event and a LTT event. | |
661 | */ | |
421cb601 | 662 | static void shadow_copy_event(struct ust_app_event *ua_event, |
48842b30 DG |
663 | struct ltt_ust_event *uevent) |
664 | { | |
55cc08a6 DG |
665 | struct cds_lfht_iter iter; |
666 | struct ltt_ust_context *uctx; | |
667 | struct ust_app_ctx *ua_ctx; | |
668 | ||
48842b30 DG |
669 | strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name)); |
670 | ua_event->name[sizeof(ua_event->name) - 1] = '\0'; | |
671 | ||
5b4a0ec0 DG |
672 | /* Copy event attributes */ |
673 | memcpy(&ua_event->attr, &uevent->attr, sizeof(ua_event->attr)); | |
674 | ||
55cc08a6 DG |
675 | cds_lfht_for_each_entry(uevent->ctx, &iter, uctx, node) { |
676 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); | |
677 | if (ua_ctx == NULL) { | |
678 | continue; | |
679 | } | |
680 | hashtable_node_init(&ua_ctx->node, | |
681 | (void *)((unsigned long) ua_ctx->ctx.ctx), sizeof(void *)); | |
682 | hashtable_add_unique(ua_event->ctx, &ua_ctx->node); | |
683 | } | |
48842b30 DG |
684 | } |
685 | ||
5b4a0ec0 DG |
686 | /* |
687 | * Copy data between an UST app channel and a LTT channel. | |
688 | */ | |
421cb601 | 689 | static void shadow_copy_channel(struct ust_app_channel *ua_chan, |
48842b30 DG |
690 | struct ltt_ust_channel *uchan) |
691 | { | |
692 | struct cds_lfht_iter iter; | |
5b4a0ec0 | 693 | struct cds_lfht_node *ua_event_node; |
48842b30 | 694 | struct ltt_ust_event *uevent; |
55cc08a6 | 695 | struct ltt_ust_context *uctx; |
48842b30 | 696 | struct ust_app_event *ua_event; |
55cc08a6 | 697 | struct ust_app_ctx *ua_ctx; |
48842b30 | 698 | |
421cb601 | 699 | DBG2("Shadow copy of UST app channel %s", ua_chan->name); |
48842b30 DG |
700 | |
701 | strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name)); | |
702 | ua_chan->name[sizeof(ua_chan->name) - 1] = '\0'; | |
5b4a0ec0 DG |
703 | /* Copy event attributes */ |
704 | memcpy(&ua_chan->attr, &uchan->attr, sizeof(ua_chan->attr)); | |
48842b30 | 705 | |
55cc08a6 DG |
706 | cds_lfht_for_each_entry(uchan->ctx, &iter, uctx, node) { |
707 | ua_ctx = alloc_ust_app_ctx(&uctx->ctx); | |
708 | if (ua_ctx == NULL) { | |
709 | continue; | |
710 | } | |
711 | hashtable_node_init(&ua_ctx->node, | |
712 | (void *)((unsigned long) ua_ctx->ctx.ctx), sizeof(void *)); | |
713 | hashtable_add_unique(ua_chan->ctx, &ua_ctx->node); | |
714 | } | |
48842b30 | 715 | |
421cb601 | 716 | /* Copy all events from ltt ust channel to ust app channel */ |
5b4a0ec0 | 717 | cds_lfht_for_each_entry(uchan->events, &iter, uevent, node) { |
ba767faf MD |
718 | struct cds_lfht_iter uiter; |
719 | ||
48842b30 | 720 | ua_event_node = hashtable_lookup(ua_chan->events, |
ba767faf MD |
721 | (void *) uevent->attr.name, strlen(uevent->attr.name), |
722 | &uiter); | |
48842b30 | 723 | if (ua_event_node == NULL) { |
421cb601 | 724 | DBG2("UST event %s not found on shadow copy channel", |
48842b30 | 725 | uevent->attr.name); |
284d8f55 | 726 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); |
48842b30 | 727 | if (ua_event == NULL) { |
5b4a0ec0 | 728 | continue; |
48842b30 | 729 | } |
421cb601 | 730 | shadow_copy_event(ua_event, uevent); |
48842b30 | 731 | hashtable_add_unique(ua_chan->events, &ua_event->node); |
48842b30 | 732 | } |
48842b30 DG |
733 | } |
734 | ||
421cb601 | 735 | DBG3("Shadow copy channel done"); |
48842b30 DG |
736 | } |
737 | ||
5b4a0ec0 DG |
738 | /* |
739 | * Copy data between a UST app session and a regular LTT session. | |
740 | */ | |
421cb601 | 741 | static void shadow_copy_session(struct ust_app_session *ua_sess, |
477d7741 MD |
742 | struct ltt_ust_session *usess, |
743 | struct ust_app *app) | |
48842b30 | 744 | { |
5b4a0ec0 | 745 | struct cds_lfht_node *ua_chan_node; |
48842b30 DG |
746 | struct cds_lfht_iter iter; |
747 | struct ltt_ust_channel *uchan; | |
748 | struct ust_app_channel *ua_chan; | |
477d7741 MD |
749 | time_t rawtime; |
750 | struct tm *timeinfo; | |
751 | char datetime[16]; | |
752 | int ret; | |
753 | ||
754 | /* Get date and time for unique app path */ | |
755 | time(&rawtime); | |
756 | timeinfo = localtime(&rawtime); | |
757 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
48842b30 | 758 | |
421cb601 | 759 | DBG2("Shadow copy of session handle %d", ua_sess->handle); |
48842b30 DG |
760 | |
761 | ua_sess->uid = usess->uid; | |
762 | ||
477d7741 MD |
763 | ret = snprintf(ua_sess->path, PATH_MAX, |
764 | "%s/%s-%d-%s", | |
765 | usess->pathname, app->name, app->key.pid, | |
766 | datetime); | |
767 | if (ret < 0) { | |
768 | PERROR("asprintf UST shadow copy session"); | |
769 | /* TODO: We cannot return an error from here.. */ | |
770 | assert(0); | |
771 | } | |
772 | ||
48842b30 DG |
773 | /* TODO: support all UST domain */ |
774 | ||
775 | /* Iterate over all channels in global domain. */ | |
5b4a0ec0 DG |
776 | cds_lfht_for_each_entry(usess->domain_global.channels, &iter, |
777 | uchan, node) { | |
ba767faf MD |
778 | struct cds_lfht_iter uiter; |
779 | ||
48842b30 | 780 | ua_chan_node = hashtable_lookup(ua_sess->channels, |
ba767faf MD |
781 | (void *)uchan->name, strlen(uchan->name), |
782 | &uiter); | |
5b4a0ec0 DG |
783 | if (ua_chan_node != NULL) { |
784 | continue; | |
785 | } | |
421cb601 | 786 | |
5b4a0ec0 DG |
787 | DBG2("Channel %s not found on shadow session copy, creating it", |
788 | uchan->name); | |
789 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
790 | if (ua_chan == NULL) { | |
791 | /* malloc failed... continuing */ | |
792 | continue; | |
48842b30 DG |
793 | } |
794 | ||
5b4a0ec0 DG |
795 | shadow_copy_channel(ua_chan, uchan); |
796 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
48842b30 DG |
797 | } |
798 | } | |
799 | ||
78f0bacd DG |
800 | /* |
801 | * Lookup sesison wrapper. | |
802 | */ | |
84cd17c6 MD |
803 | static |
804 | void __lookup_session_by_app(struct ltt_ust_session *usess, | |
805 | struct ust_app *app, struct cds_lfht_iter *iter) | |
806 | { | |
807 | /* Get right UST app session from app */ | |
808 | (void) hashtable_lookup(app->sessions, | |
809 | (void *) ((unsigned long) usess->uid), sizeof(void *), | |
810 | iter); | |
811 | } | |
812 | ||
421cb601 DG |
813 | /* |
814 | * Return ust app session from the app session hashtable using the UST session | |
815 | * uid. | |
816 | */ | |
48842b30 DG |
817 | static struct ust_app_session *lookup_session_by_app( |
818 | struct ltt_ust_session *usess, struct ust_app *app) | |
819 | { | |
820 | struct cds_lfht_iter iter; | |
821 | struct cds_lfht_node *node; | |
822 | ||
84cd17c6 MD |
823 | __lookup_session_by_app(usess, app, &iter); |
824 | node = hashtable_iter_get_node(&iter); | |
48842b30 DG |
825 | if (node == NULL) { |
826 | goto error; | |
827 | } | |
828 | ||
829 | return caa_container_of(node, struct ust_app_session, node); | |
830 | ||
831 | error: | |
832 | return NULL; | |
833 | } | |
834 | ||
421cb601 DG |
835 | /* |
836 | * Create a UST session onto the tracer of app and add it the session | |
837 | * hashtable. | |
838 | * | |
839 | * Return ust app session or NULL on error. | |
840 | */ | |
841 | static struct ust_app_session *create_ust_app_session( | |
842 | struct ltt_ust_session *usess, struct ust_app *app) | |
843 | { | |
844 | int ret; | |
845 | struct ust_app_session *ua_sess; | |
846 | ||
847 | ua_sess = lookup_session_by_app(usess, app); | |
848 | if (ua_sess == NULL) { | |
849 | DBG2("UST app pid: %d session uid %d not found, creating it", | |
850 | app->key.pid, usess->uid); | |
851 | ua_sess = alloc_ust_app_session(); | |
852 | if (ua_sess == NULL) { | |
853 | /* Only malloc can failed so something is really wrong */ | |
854 | goto error; | |
855 | } | |
477d7741 | 856 | shadow_copy_session(ua_sess, usess, app); |
421cb601 DG |
857 | } |
858 | ||
859 | if (ua_sess->handle == -1) { | |
860 | ret = ustctl_create_session(app->key.sock); | |
861 | if (ret < 0) { | |
862 | ERR("Error creating session for app pid %d, sock %d", | |
863 | app->key.pid, app->key.sock); | |
864 | /* TODO: free() ua_sess */ | |
865 | goto error; | |
866 | } | |
867 | ||
868 | DBG2("UST app ustctl create session handle %d", ret); | |
869 | ua_sess->handle = ret; | |
870 | ||
871 | /* Add ust app session to app's HT */ | |
872 | hashtable_node_init(&ua_sess->node, | |
873 | (void *)((unsigned long) ua_sess->uid), sizeof(void *)); | |
874 | hashtable_add_unique(app->sessions, &ua_sess->node); | |
875 | ||
876 | DBG2("UST app session created successfully with handle %d", ret); | |
877 | } | |
878 | ||
879 | return ua_sess; | |
880 | ||
881 | error: | |
882 | return NULL; | |
883 | } | |
884 | ||
55cc08a6 DG |
885 | /* |
886 | * Create a context for the channel on the tracer. | |
887 | */ | |
888 | static | |
889 | int create_ust_app_channel_context(struct ust_app_session *ua_sess, | |
890 | struct ust_app_channel *ua_chan, struct lttng_ust_context *uctx, | |
891 | struct ust_app *app) | |
892 | { | |
893 | int ret = 0; | |
894 | struct cds_lfht_iter iter; | |
895 | struct cds_lfht_node *node; | |
896 | struct ust_app_ctx *ua_ctx; | |
897 | ||
898 | DBG2("UST app adding context to channel %s", ua_chan->name); | |
899 | ||
900 | node = hashtable_lookup(ua_chan->ctx, (void *)((unsigned long)uctx->ctx), | |
901 | sizeof(void *), &iter); | |
902 | if (node != NULL) { | |
903 | ret = -EEXIST; | |
904 | goto error; | |
905 | } | |
906 | ||
907 | ua_ctx = alloc_ust_app_ctx(uctx); | |
908 | if (ua_ctx == NULL) { | |
909 | /* malloc failed */ | |
910 | ret = -1; | |
911 | goto error; | |
912 | } | |
913 | ||
914 | hashtable_node_init(&ua_ctx->node, | |
915 | (void *)((unsigned long) ua_ctx->ctx.ctx), sizeof(void *)); | |
916 | hashtable_add_unique(ua_chan->ctx, &ua_ctx->node); | |
917 | ||
918 | ret = create_ust_channel_context(ua_chan, ua_ctx, app); | |
919 | if (ret < 0) { | |
920 | goto error; | |
921 | } | |
922 | ||
923 | error: | |
924 | return ret; | |
925 | } | |
926 | ||
927 | /* | |
928 | * Create an UST context and enable it for the event on the tracer. | |
929 | */ | |
930 | static | |
931 | int create_ust_app_event_context(struct ust_app_session *ua_sess, | |
932 | struct ust_app_event *ua_event, struct lttng_ust_context *uctx, | |
933 | struct ust_app *app) | |
934 | { | |
935 | int ret = 0; | |
936 | struct cds_lfht_iter iter; | |
937 | struct cds_lfht_node *node; | |
938 | struct ust_app_ctx *ua_ctx; | |
939 | ||
940 | DBG2("UST app adding context to event %s", ua_event->name); | |
941 | ||
942 | node = hashtable_lookup(ua_event->ctx, (void *)((unsigned long)uctx->ctx), | |
943 | sizeof(void *), &iter); | |
944 | if (node != NULL) { | |
945 | ret = -EEXIST; | |
946 | goto error; | |
947 | } | |
948 | ||
949 | ua_ctx = alloc_ust_app_ctx(uctx); | |
950 | if (ua_ctx == NULL) { | |
951 | /* malloc failed */ | |
952 | ret = -1; | |
953 | goto error; | |
954 | } | |
955 | ||
956 | hashtable_node_init(&ua_ctx->node, | |
957 | (void *)((unsigned long) ua_ctx->ctx.ctx), sizeof(void *)); | |
958 | hashtable_add_unique(ua_event->ctx, &ua_ctx->node); | |
959 | ||
960 | ret = create_ust_event_context(ua_event, ua_ctx, app); | |
961 | if (ret < 0) { | |
962 | goto error; | |
963 | } | |
964 | ||
965 | error: | |
966 | return ret; | |
967 | } | |
968 | ||
edb67388 DG |
969 | /* |
970 | * Enable on the tracer side a ust app event for the session and channel. | |
971 | */ | |
972 | static | |
973 | int enable_ust_app_event(struct ust_app_session *ua_sess, | |
35a9059d | 974 | struct ust_app_event *ua_event, struct ust_app *app) |
edb67388 DG |
975 | { |
976 | int ret; | |
977 | ||
978 | ret = enable_ust_event(app, ua_sess, ua_event); | |
979 | if (ret < 0) { | |
980 | goto error; | |
981 | } | |
982 | ||
983 | ua_event->enabled = 1; | |
984 | ||
985 | error: | |
986 | return ret; | |
987 | } | |
988 | ||
9730260e DG |
989 | /* |
990 | * Disable on the tracer side a ust app event for the session and channel. | |
991 | */ | |
992 | static int disable_ust_app_event(struct ust_app_session *ua_sess, | |
993 | struct ust_app_channel *ua_chan, struct ust_app_event *ua_event, | |
994 | struct ust_app *app) | |
995 | { | |
996 | int ret; | |
997 | ||
998 | ret = disable_ust_event(app, ua_sess, ua_event); | |
999 | if (ret < 0) { | |
1000 | goto error; | |
1001 | } | |
1002 | ||
1003 | ua_event->enabled = 0; | |
1004 | ||
1005 | error: | |
1006 | return ret; | |
1007 | } | |
1008 | ||
78f0bacd DG |
1009 | /* |
1010 | * Lookup ust app channel for session and disable it on the tracer side. | |
1011 | */ | |
8535a6d9 DG |
1012 | static |
1013 | int disable_ust_app_channel(struct ust_app_session *ua_sess, | |
1014 | struct ust_app_channel *ua_chan, struct ust_app *app) | |
78f0bacd | 1015 | { |
8535a6d9 | 1016 | int ret; |
78f0bacd DG |
1017 | |
1018 | ret = disable_ust_channel(app, ua_sess, ua_chan); | |
1019 | if (ret < 0) { | |
1020 | goto error; | |
1021 | } | |
1022 | ||
8535a6d9 DG |
1023 | ua_chan->enabled = 0; |
1024 | ||
78f0bacd DG |
1025 | error: |
1026 | return ret; | |
1027 | } | |
1028 | ||
1029 | /* | |
1030 | * Lookup ust app channel for session and enable it on the tracer side. | |
1031 | */ | |
1032 | static int enable_ust_app_channel(struct ust_app_session *ua_sess, | |
1033 | struct ltt_ust_channel *uchan, struct ust_app *app) | |
1034 | { | |
1035 | int ret = 0; | |
1036 | struct cds_lfht_iter iter; | |
1037 | struct cds_lfht_node *ua_chan_node; | |
1038 | struct ust_app_channel *ua_chan; | |
1039 | ||
1040 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
1041 | (void *)uchan->name, strlen(uchan->name), &iter); | |
1042 | if (ua_chan_node == NULL) { | |
1043 | DBG2("Unable to find channel %s in ust session uid %u", | |
1044 | uchan->name, ua_sess->uid); | |
1045 | goto error; | |
1046 | } | |
1047 | ||
1048 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1049 | ||
1050 | ret = enable_ust_channel(app, ua_sess, ua_chan); | |
1051 | if (ret < 0) { | |
1052 | goto error; | |
1053 | } | |
1054 | ||
1055 | error: | |
1056 | return ret; | |
1057 | } | |
1058 | ||
284d8f55 | 1059 | /* |
5b4a0ec0 | 1060 | * Create UST app channel and create it on the tracer. |
284d8f55 | 1061 | */ |
5b4a0ec0 DG |
1062 | static struct ust_app_channel *create_ust_app_channel( |
1063 | struct ust_app_session *ua_sess, struct ltt_ust_channel *uchan, | |
1064 | struct ust_app *app) | |
1065 | { | |
1066 | int ret = 0; | |
1067 | struct cds_lfht_iter iter; | |
1068 | struct cds_lfht_node *ua_chan_node; | |
1069 | struct ust_app_channel *ua_chan; | |
1070 | ||
1071 | /* Lookup channel in the ust app session */ | |
1072 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
1073 | (void *)uchan->name, strlen(uchan->name), &iter); | |
1074 | if (ua_chan_node == NULL) { | |
1075 | DBG2("Unable to find channel %s in ust session uid %u", | |
1076 | uchan->name, ua_sess->uid); | |
1077 | ua_chan = alloc_ust_app_channel(uchan->name, &uchan->attr); | |
1078 | if (ua_chan == NULL) { | |
1079 | goto error; | |
1080 | } | |
1081 | shadow_copy_channel(ua_chan, uchan); | |
1082 | ||
1083 | hashtable_add_unique(ua_sess->channels, &ua_chan->node); | |
1084 | } else { | |
1085 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1086 | } | |
1087 | ||
1088 | ret = create_ust_channel(app, ua_sess, ua_chan); | |
1089 | if (ret < 0) { | |
1090 | goto error; | |
1091 | } | |
1092 | ||
1093 | return ua_chan; | |
1094 | ||
1095 | error: | |
1096 | return NULL; | |
1097 | } | |
1098 | ||
1099 | /* | |
1100 | * Create UST app event and create it on the tracer side. | |
1101 | */ | |
edb67388 DG |
1102 | static |
1103 | int create_ust_app_event(struct ust_app_session *ua_sess, | |
1104 | struct ust_app_channel *ua_chan, struct ltt_ust_event *uevent, | |
1105 | struct ust_app *app) | |
284d8f55 | 1106 | { |
edb67388 | 1107 | int ret = 0; |
5b4a0ec0 DG |
1108 | struct cds_lfht_iter iter; |
1109 | struct cds_lfht_node *ua_event_node; | |
1110 | struct ust_app_event *ua_event; | |
284d8f55 | 1111 | |
5b4a0ec0 DG |
1112 | /* Get event node */ |
1113 | ua_event_node = hashtable_lookup(ua_chan->events, | |
1114 | (void *)uevent->attr.name, strlen(uevent->attr.name), &iter); | |
edb67388 DG |
1115 | if (ua_event_node != NULL) { |
1116 | ERR("UST app event %s already exist. Stopping creation.", | |
1117 | uevent->attr.name); | |
1118 | goto end; | |
1119 | } | |
5b4a0ec0 | 1120 | |
edb67388 DG |
1121 | /* Does not exist so create one */ |
1122 | ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr); | |
1123 | if (ua_event == NULL) { | |
1124 | /* Only malloc can failed so something is really wrong */ | |
1125 | ret = -ENOMEM; | |
1126 | goto error; | |
5b4a0ec0 | 1127 | } |
edb67388 | 1128 | shadow_copy_event(ua_event, uevent); |
5b4a0ec0 | 1129 | |
edb67388 | 1130 | /* Create it on the tracer side */ |
5b4a0ec0 | 1131 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); |
284d8f55 | 1132 | if (ret < 0) { |
edb67388 | 1133 | delete_ust_app_event(app->key.sock, ua_event); |
284d8f55 DG |
1134 | goto error; |
1135 | } | |
1136 | ||
8535a6d9 DG |
1137 | ua_event->enabled = 1; |
1138 | ||
edb67388 | 1139 | hashtable_add_unique(ua_chan->events, &ua_event->node); |
284d8f55 | 1140 | |
edb67388 | 1141 | end: |
5b4a0ec0 | 1142 | error: |
edb67388 | 1143 | return ret; |
5b4a0ec0 DG |
1144 | } |
1145 | ||
1146 | /* | |
1147 | * Create UST metadata and open it on the tracer side. | |
1148 | */ | |
1149 | static int create_ust_app_metadata(struct ust_app_session *ua_sess, | |
1150 | char *pathname, struct ust_app *app) | |
1151 | { | |
1152 | int ret = 0; | |
1153 | ||
1154 | if (ua_sess->metadata == NULL) { | |
1155 | /* Allocate UST metadata */ | |
1156 | ua_sess->metadata = trace_ust_create_metadata(pathname); | |
1157 | if (ua_sess->metadata == NULL) { | |
1158 | ERR("UST app session %d creating metadata failed", | |
1159 | ua_sess->handle); | |
1160 | goto error; | |
1161 | } | |
1162 | ||
1163 | ret = open_ust_metadata(app, ua_sess); | |
1164 | if (ret < 0) { | |
1165 | goto error; | |
1166 | } | |
1167 | ||
1168 | DBG2("UST metadata opened for app pid %d", app->key.pid); | |
1169 | } | |
1170 | ||
1171 | /* Open UST metadata stream */ | |
1172 | if (ua_sess->metadata->stream_obj == NULL) { | |
1173 | ret = create_ust_stream(app, ua_sess); | |
1174 | if (ret < 0) { | |
1175 | goto error; | |
1176 | } | |
1177 | ||
477d7741 | 1178 | ret = mkdir(ua_sess->path, S_IRWXU | S_IRWXG); |
5b4a0ec0 DG |
1179 | if (ret < 0) { |
1180 | PERROR("mkdir UST metadata"); | |
1181 | goto error; | |
1182 | } | |
1183 | ||
477d7741 MD |
1184 | ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, |
1185 | "%s/metadata", ua_sess->path); | |
5b4a0ec0 DG |
1186 | if (ret < 0) { |
1187 | PERROR("asprintf UST create stream"); | |
1188 | goto error; | |
1189 | } | |
1190 | ||
1191 | DBG2("UST metadata stream object created for app pid %d", | |
1192 | app->key.pid); | |
1193 | } else { | |
1194 | ERR("Attempting to create stream without metadata opened"); | |
1195 | goto error; | |
1196 | } | |
1197 | ||
1198 | return 0; | |
1199 | ||
1200 | error: | |
1201 | return -1; | |
1202 | } | |
1203 | ||
1204 | /* | |
1205 | * Return pointer to traceable apps list. | |
1206 | */ | |
1207 | struct cds_lfht *ust_app_get_ht(void) | |
1208 | { | |
1209 | return ust_app_ht; | |
1210 | } | |
1211 | ||
1212 | /* | |
1213 | * Return ust app pointer or NULL if not found. | |
1214 | */ | |
1215 | struct ust_app *ust_app_find_by_pid(pid_t pid) | |
1216 | { | |
1217 | struct cds_lfht_node *node; | |
1218 | struct cds_lfht_iter iter; | |
1219 | ||
1220 | rcu_read_lock(); | |
1221 | node = hashtable_lookup(ust_app_ht, | |
1222 | (void *)((unsigned long) pid), sizeof(void *), &iter); | |
1223 | if (node == NULL) { | |
1224 | DBG2("UST app no found with pid %d", pid); | |
1225 | goto error; | |
1226 | } | |
1227 | rcu_read_unlock(); | |
1228 | ||
1229 | DBG2("Found UST app by pid %d", pid); | |
1230 | ||
1231 | return caa_container_of(node, struct ust_app, node); | |
1232 | ||
1233 | error: | |
1234 | rcu_read_unlock(); | |
1235 | return NULL; | |
1236 | } | |
1237 | ||
1238 | /* | |
1239 | * Using pid and uid (of the app), allocate a new ust_app struct and | |
1240 | * add it to the global traceable app list. | |
1241 | * | |
0df502fd MD |
1242 | * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app |
1243 | * bitness is not supported. | |
5b4a0ec0 DG |
1244 | */ |
1245 | int ust_app_register(struct ust_register_msg *msg, int sock) | |
1246 | { | |
1247 | struct ust_app *lta; | |
1248 | ||
7753dea8 MD |
1249 | if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL) |
1250 | || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) { | |
f943b0fb | 1251 | ERR("Registration failed: application \"%s\" (pid: %d) has " |
7753dea8 MD |
1252 | "%d-bit long, but no consumerd for this long size is available.\n", |
1253 | msg->name, msg->pid, msg->bits_per_long); | |
88ff5b7f | 1254 | close(sock); |
0df502fd MD |
1255 | return -EINVAL; |
1256 | } | |
5b4a0ec0 DG |
1257 | lta = zmalloc(sizeof(struct ust_app)); |
1258 | if (lta == NULL) { | |
1259 | PERROR("malloc"); | |
1260 | return -ENOMEM; | |
1261 | } | |
1262 | ||
1263 | lta->ppid = msg->ppid; | |
1264 | lta->uid = msg->uid; | |
1265 | lta->gid = msg->gid; | |
7753dea8 | 1266 | lta->bits_per_long = msg->bits_per_long; |
5b4a0ec0 DG |
1267 | lta->v_major = msg->major; |
1268 | lta->v_minor = msg->minor; | |
1269 | strncpy(lta->name, msg->name, sizeof(lta->name)); | |
1270 | lta->name[16] = '\0'; | |
1271 | lta->sessions = hashtable_new(0); | |
1272 | ||
1273 | /* Set key map */ | |
1274 | lta->key.pid = msg->pid; | |
1275 | hashtable_node_init(<a->node, (void *)((unsigned long)lta->key.pid), | |
1276 | sizeof(void *)); | |
1277 | lta->key.sock = sock; | |
1278 | hashtable_node_init(<a->key.node, (void *)((unsigned long)lta->key.sock), | |
1279 | sizeof(void *)); | |
1280 | ||
1281 | rcu_read_lock(); | |
1282 | hashtable_add_unique(ust_app_sock_key_map, <a->key.node); | |
1283 | hashtable_add_unique(ust_app_ht, <a->node); | |
1284 | rcu_read_unlock(); | |
1285 | ||
1286 | DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s" | |
1287 | " (version %d.%d)", lta->key.pid, lta->ppid, lta->uid, lta->gid, | |
1288 | lta->key.sock, lta->name, lta->v_major, lta->v_minor); | |
1289 | ||
1290 | return 0; | |
1291 | } | |
1292 | ||
1293 | /* | |
1294 | * Unregister app by removing it from the global traceable app list and freeing | |
1295 | * the data struct. | |
1296 | * | |
1297 | * The socket is already closed at this point so no close to sock. | |
1298 | */ | |
1299 | void ust_app_unregister(int sock) | |
1300 | { | |
1301 | struct ust_app *lta; | |
1302 | struct cds_lfht_node *node; | |
1303 | struct cds_lfht_iter iter; | |
525b0740 | 1304 | int ret; |
5b4a0ec0 DG |
1305 | |
1306 | rcu_read_lock(); | |
1307 | lta = find_app_by_sock(sock); | |
1308 | if (lta == NULL) { | |
1309 | ERR("Unregister app sock %d not found!", sock); | |
1310 | goto error; | |
1311 | } | |
1312 | ||
1313 | DBG("PID %d unregistering with sock %d", lta->key.pid, sock); | |
1314 | ||
1315 | /* Get the node reference for a call_rcu */ | |
1316 | node = hashtable_lookup(ust_app_ht, | |
1317 | (void *)((unsigned long) lta->key.pid), sizeof(void *), &iter); | |
1318 | if (node == NULL) { | |
1319 | ERR("Unable to find app sock %d by pid %d", sock, lta->key.pid); | |
1320 | goto error; | |
1321 | } | |
284d8f55 | 1322 | |
525b0740 MD |
1323 | ret = hashtable_del(ust_app_ht, &iter); |
1324 | assert(!ret); | |
5b4a0ec0 | 1325 | call_rcu(&node->head, delete_ust_app_rcu); |
284d8f55 | 1326 | error: |
5b4a0ec0 DG |
1327 | rcu_read_unlock(); |
1328 | return; | |
284d8f55 DG |
1329 | } |
1330 | ||
1331 | /* | |
5b4a0ec0 | 1332 | * Return traceable_app_count |
284d8f55 | 1333 | */ |
5b4a0ec0 | 1334 | unsigned long ust_app_list_count(void) |
284d8f55 | 1335 | { |
5b4a0ec0 | 1336 | unsigned long count; |
284d8f55 | 1337 | |
5b4a0ec0 DG |
1338 | rcu_read_lock(); |
1339 | count = hashtable_get_count(ust_app_ht); | |
1340 | rcu_read_unlock(); | |
284d8f55 | 1341 | |
5b4a0ec0 | 1342 | return count; |
284d8f55 DG |
1343 | } |
1344 | ||
5b4a0ec0 DG |
1345 | /* |
1346 | * Fill events array with all events name of all registered apps. | |
1347 | */ | |
1348 | int ust_app_list_events(struct lttng_event **events) | |
421cb601 | 1349 | { |
5b4a0ec0 DG |
1350 | int ret, handle; |
1351 | size_t nbmem, count = 0; | |
421cb601 | 1352 | struct cds_lfht_iter iter; |
5b4a0ec0 DG |
1353 | struct ust_app *app; |
1354 | struct lttng_event *tmp; | |
421cb601 | 1355 | |
5b4a0ec0 DG |
1356 | nbmem = UST_APP_EVENT_LIST_SIZE; |
1357 | tmp = zmalloc(nbmem * sizeof(struct lttng_event)); | |
1358 | if (tmp == NULL) { | |
1359 | PERROR("zmalloc ust app events"); | |
1360 | ret = -ENOMEM; | |
421cb601 DG |
1361 | goto error; |
1362 | } | |
1363 | ||
5b4a0ec0 | 1364 | rcu_read_lock(); |
421cb601 | 1365 | |
5b4a0ec0 DG |
1366 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
1367 | handle = ustctl_tracepoint_list(app->key.sock); | |
1368 | if (handle < 0) { | |
1369 | ERR("UST app list events getting handle failed for app pid %d", | |
1370 | app->key.pid); | |
1371 | continue; | |
1372 | } | |
421cb601 | 1373 | |
5b4a0ec0 DG |
1374 | while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle, |
1375 | tmp[count].name)) != -ENOENT) { | |
1376 | if (count > nbmem) { | |
1377 | DBG2("Reallocating event list from %zu to %zu bytes", nbmem, | |
1378 | nbmem + UST_APP_EVENT_LIST_SIZE); | |
1379 | nbmem += UST_APP_EVENT_LIST_SIZE; | |
2f221590 | 1380 | tmp = realloc(tmp, nbmem * sizeof(struct lttng_event)); |
5b4a0ec0 DG |
1381 | if (tmp == NULL) { |
1382 | PERROR("realloc ust app events"); | |
1383 | ret = -ENOMEM; | |
1384 | goto rcu_error; | |
1385 | } | |
1386 | } | |
421cb601 | 1387 | |
5b4a0ec0 DG |
1388 | tmp[count].type = LTTNG_UST_TRACEPOINT; |
1389 | tmp[count].pid = app->key.pid; | |
1390 | tmp[count].enabled = -1; | |
1391 | count++; | |
421cb601 | 1392 | } |
421cb601 DG |
1393 | } |
1394 | ||
5b4a0ec0 DG |
1395 | ret = count; |
1396 | *events = tmp; | |
421cb601 | 1397 | |
5b4a0ec0 | 1398 | DBG2("UST app list events done (%zu events)", count); |
421cb601 | 1399 | |
5b4a0ec0 DG |
1400 | rcu_error: |
1401 | rcu_read_unlock(); | |
421cb601 | 1402 | error: |
5b4a0ec0 | 1403 | return ret; |
421cb601 DG |
1404 | } |
1405 | ||
5b4a0ec0 DG |
1406 | /* |
1407 | * Free and clean all traceable apps of the global list. | |
1408 | */ | |
1409 | void ust_app_clean_list(void) | |
421cb601 | 1410 | { |
5b4a0ec0 | 1411 | int ret; |
5b4a0ec0 DG |
1412 | struct cds_lfht_iter iter; |
1413 | struct ust_app *app; | |
421cb601 | 1414 | |
5b4a0ec0 | 1415 | DBG2("UST app cleaning registered apps hash table"); |
421cb601 | 1416 | |
5b4a0ec0 | 1417 | rcu_read_lock(); |
421cb601 | 1418 | |
778ca3dd | 1419 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
5b4a0ec0 | 1420 | ret = hashtable_del(ust_app_ht, &iter); |
525b0740 | 1421 | assert(!ret); |
0d5d001d | 1422 | call_rcu(&iter.node->head, delete_ust_app_rcu); |
421cb601 DG |
1423 | } |
1424 | ||
5b4a0ec0 DG |
1425 | hashtable_destroy(ust_app_ht); |
1426 | hashtable_destroy(ust_app_sock_key_map); | |
421cb601 | 1427 | |
5b4a0ec0 DG |
1428 | rcu_read_unlock(); |
1429 | } | |
1430 | ||
1431 | /* | |
1432 | * Init UST app hash table. | |
1433 | */ | |
1434 | void ust_app_ht_alloc(void) | |
1435 | { | |
1436 | ust_app_ht = hashtable_new(0); | |
1437 | ust_app_sock_key_map = hashtable_new(0); | |
421cb601 DG |
1438 | } |
1439 | ||
78f0bacd DG |
1440 | /* |
1441 | * For a specific UST session, disable the channel for all registered apps. | |
1442 | */ | |
35a9059d | 1443 | int ust_app_disable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1444 | struct ltt_ust_channel *uchan) |
1445 | { | |
1446 | int ret = 0; | |
1447 | struct cds_lfht_iter iter; | |
8535a6d9 | 1448 | struct cds_lfht_node *ua_chan_node; |
78f0bacd DG |
1449 | struct ust_app *app; |
1450 | struct ust_app_session *ua_sess; | |
8535a6d9 | 1451 | struct ust_app_channel *ua_chan; |
78f0bacd DG |
1452 | |
1453 | if (usess == NULL || uchan == NULL) { | |
1454 | ERR("Disabling UST global channel with NULL values"); | |
1455 | ret = -1; | |
1456 | goto error; | |
1457 | } | |
1458 | ||
8535a6d9 | 1459 | DBG2("UST app disabling channel %s from global domain for session uid %d", |
78f0bacd DG |
1460 | uchan->name, usess->uid); |
1461 | ||
1462 | rcu_read_lock(); | |
1463 | ||
1464 | /* For every registered applications */ | |
1465 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1466 | ua_sess = lookup_session_by_app(usess, app); | |
1467 | if (ua_sess == NULL) { | |
1468 | continue; | |
1469 | } | |
1470 | ||
8535a6d9 DG |
1471 | /* Get channel */ |
1472 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
1473 | (void *)uchan->name, strlen(uchan->name), &iter); | |
1474 | /* If the session if found for the app, the channel must be there */ | |
1475 | assert(ua_chan_node); | |
1476 | ||
1477 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1478 | /* The channel must not be already disabled */ | |
1479 | assert(ua_chan->enabled == 1); | |
1480 | ||
1481 | /* Disable channel onto application */ | |
1482 | ret = disable_ust_app_channel(ua_sess, ua_chan, app); | |
78f0bacd DG |
1483 | if (ret < 0) { |
1484 | /* XXX: We might want to report this error at some point... */ | |
1485 | continue; | |
1486 | } | |
1487 | } | |
1488 | ||
1489 | rcu_read_unlock(); | |
1490 | ||
1491 | error: | |
1492 | return ret; | |
1493 | } | |
1494 | ||
1495 | /* | |
1496 | * For a specific UST session, enable the channel for all registered apps. | |
1497 | */ | |
35a9059d | 1498 | int ust_app_enable_channel_glb(struct ltt_ust_session *usess, |
78f0bacd DG |
1499 | struct ltt_ust_channel *uchan) |
1500 | { | |
1501 | int ret = 0; | |
1502 | struct cds_lfht_iter iter; | |
1503 | struct ust_app *app; | |
1504 | struct ust_app_session *ua_sess; | |
1505 | ||
1506 | if (usess == NULL || uchan == NULL) { | |
1507 | ERR("Adding UST global channel to NULL values"); | |
1508 | ret = -1; | |
1509 | goto error; | |
1510 | } | |
1511 | ||
1512 | DBG2("UST app enabling channel %s to global domain for session uid %d", | |
1513 | uchan->name, usess->uid); | |
1514 | ||
1515 | rcu_read_lock(); | |
1516 | ||
1517 | /* For every registered applications */ | |
1518 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1519 | ua_sess = lookup_session_by_app(usess, app); | |
1520 | if (ua_sess == NULL) { | |
1521 | continue; | |
1522 | } | |
1523 | ||
1524 | /* Enable channel onto application */ | |
1525 | ret = enable_ust_app_channel(ua_sess, uchan, app); | |
1526 | if (ret < 0) { | |
1527 | /* XXX: We might want to report this error at some point... */ | |
1528 | continue; | |
1529 | } | |
1530 | } | |
1531 | ||
1532 | rcu_read_unlock(); | |
1533 | ||
1534 | error: | |
1535 | return ret; | |
1536 | } | |
1537 | ||
b0a40d28 DG |
1538 | /* |
1539 | * Disable an event in a channel and for a specific session. | |
1540 | */ | |
35a9059d DG |
1541 | int ust_app_disable_event_glb(struct ltt_ust_session *usess, |
1542 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) | |
b0a40d28 DG |
1543 | { |
1544 | int ret = 0; | |
1545 | struct cds_lfht_iter iter, uiter; | |
1546 | struct cds_lfht_node *ua_chan_node, *ua_event_node; | |
1547 | struct ust_app *app; | |
1548 | struct ust_app_session *ua_sess; | |
1549 | struct ust_app_channel *ua_chan; | |
1550 | struct ust_app_event *ua_event; | |
1551 | ||
1552 | DBG("UST app disabling event %s for all apps in channel " | |
35a9059d | 1553 | "%s for session uid %d", uevent->attr.name, uchan->name, usess->uid); |
b0a40d28 DG |
1554 | |
1555 | rcu_read_lock(); | |
1556 | ||
1557 | /* For all registered applications */ | |
1558 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1559 | ua_sess = lookup_session_by_app(usess, app); | |
1560 | if (ua_sess == NULL) { | |
1561 | /* Next app */ | |
1562 | continue; | |
1563 | } | |
1564 | ||
1565 | /* Lookup channel in the ust app session */ | |
1566 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
1567 | (void *)uchan->name, strlen(uchan->name), &uiter); | |
1568 | if (ua_chan_node == NULL) { | |
1569 | DBG2("Channel %s not found in session uid %d for app pid %d." | |
1570 | "Skipping", uchan->name, usess->uid, app->key.pid); | |
1571 | continue; | |
1572 | } | |
1573 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1574 | ||
1575 | ua_event_node = hashtable_lookup(ua_chan->events, | |
35a9059d | 1576 | (void *)uevent->attr.name, strlen(uevent->attr.name), &uiter); |
b0a40d28 DG |
1577 | if (ua_event_node == NULL) { |
1578 | DBG2("Event %s not found in channel %s for app pid %d." | |
35a9059d | 1579 | "Skipping", uevent->attr.name, uchan->name, app->key.pid); |
b0a40d28 DG |
1580 | continue; |
1581 | } | |
1582 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1583 | ||
1584 | ret = disable_ust_app_event(ua_sess, ua_chan, ua_event, app); | |
1585 | if (ret < 0) { | |
1586 | /* XXX: Report error someday... */ | |
1587 | continue; | |
1588 | } | |
1589 | } | |
1590 | ||
1591 | rcu_read_unlock(); | |
1592 | ||
1593 | return ret; | |
1594 | } | |
1595 | ||
9730260e | 1596 | /* |
edb67388 | 1597 | * For a specific UST session and UST channel, the event for all |
9730260e DG |
1598 | * registered apps. |
1599 | */ | |
35a9059d | 1600 | int ust_app_disable_all_event_glb(struct ltt_ust_session *usess, |
9730260e DG |
1601 | struct ltt_ust_channel *uchan) |
1602 | { | |
1603 | int ret = 0; | |
1604 | struct cds_lfht_iter iter, uiter; | |
1605 | struct cds_lfht_node *ua_chan_node; | |
1606 | struct ust_app *app; | |
1607 | struct ust_app_session *ua_sess; | |
1608 | struct ust_app_channel *ua_chan; | |
1609 | struct ust_app_event *ua_event; | |
1610 | ||
1611 | DBG("UST app disabling all event for all apps in channel " | |
1612 | "%s for session uid %d", uchan->name, usess->uid); | |
1613 | ||
1614 | rcu_read_lock(); | |
1615 | ||
1616 | /* For all registered applications */ | |
1617 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1618 | ua_sess = lookup_session_by_app(usess, app); | |
edb67388 DG |
1619 | /* If ua_sess is NULL, there is a code flow error */ |
1620 | assert(ua_sess); | |
9730260e DG |
1621 | |
1622 | /* Lookup channel in the ust app session */ | |
edb67388 DG |
1623 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, |
1624 | strlen(uchan->name), &uiter); | |
1625 | /* If the channel is not found, there is a code flow error */ | |
1626 | assert(ua_chan_node); | |
1627 | ||
9730260e DG |
1628 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1629 | ||
1630 | /* Disable each events of channel */ | |
1631 | cds_lfht_for_each_entry(ua_chan->events, &uiter, ua_event, node) { | |
1632 | ret = disable_ust_app_event(ua_sess, ua_chan, ua_event, app); | |
1633 | if (ret < 0) { | |
1634 | /* XXX: Report error someday... */ | |
1635 | continue; | |
1636 | } | |
1637 | } | |
1638 | } | |
1639 | ||
1640 | rcu_read_unlock(); | |
1641 | ||
1642 | return ret; | |
1643 | } | |
1644 | ||
421cb601 | 1645 | /* |
5b4a0ec0 | 1646 | * For a specific UST session, create the channel for all registered apps. |
421cb601 | 1647 | */ |
35a9059d | 1648 | int ust_app_create_channel_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1649 | struct ltt_ust_channel *uchan) |
1650 | { | |
1651 | int ret = 0; | |
1652 | struct cds_lfht_iter iter; | |
48842b30 DG |
1653 | struct ust_app *app; |
1654 | struct ust_app_session *ua_sess; | |
1655 | struct ust_app_channel *ua_chan; | |
1656 | ||
421cb601 DG |
1657 | if (usess == NULL || uchan == NULL) { |
1658 | ERR("Adding UST global channel to NULL values"); | |
1659 | ret = -1; | |
1660 | goto error; | |
1661 | } | |
1662 | ||
48842b30 DG |
1663 | DBG2("UST app adding channel %s to global domain for session uid %d", |
1664 | uchan->name, usess->uid); | |
1665 | ||
1666 | rcu_read_lock(); | |
421cb601 | 1667 | |
5b4a0ec0 DG |
1668 | /* For every registered applications */ |
1669 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
edb67388 DG |
1670 | /* |
1671 | * Create session on the tracer side and add it to app session HT. Note | |
1672 | * that if session exist, it will simply return a pointer to the ust | |
1673 | * app session. | |
1674 | */ | |
421cb601 | 1675 | ua_sess = create_ust_app_session(usess, app); |
509cbaf8 | 1676 | if (ua_sess == NULL) { |
5b4a0ec0 | 1677 | continue; |
48842b30 DG |
1678 | } |
1679 | ||
421cb601 DG |
1680 | /* Create channel onto application */ |
1681 | ua_chan = create_ust_app_channel(ua_sess, uchan, app); | |
1682 | if (ua_chan == NULL) { | |
5b4a0ec0 | 1683 | continue; |
48842b30 | 1684 | } |
48842b30 | 1685 | } |
5b4a0ec0 | 1686 | |
48842b30 DG |
1687 | rcu_read_unlock(); |
1688 | ||
421cb601 | 1689 | error: |
48842b30 DG |
1690 | return ret; |
1691 | } | |
1692 | ||
5b4a0ec0 | 1693 | /* |
edb67388 | 1694 | * Enable event for a specific session and channel on the tracer. |
5b4a0ec0 | 1695 | */ |
35a9059d | 1696 | int ust_app_enable_event_glb(struct ltt_ust_session *usess, |
48842b30 DG |
1697 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1698 | { | |
1699 | int ret = 0; | |
edb67388 | 1700 | struct cds_lfht_iter iter, uiter; |
35a9059d | 1701 | struct cds_lfht_node *ua_chan_node, *ua_event_node; |
48842b30 DG |
1702 | struct ust_app *app; |
1703 | struct ust_app_session *ua_sess; | |
1704 | struct ust_app_channel *ua_chan; | |
1705 | struct ust_app_event *ua_event; | |
48842b30 | 1706 | |
edb67388 | 1707 | DBG("UST app enabling event %s for all apps for session uid %d", |
48842b30 DG |
1708 | uevent->attr.name, usess->uid); |
1709 | ||
edb67388 DG |
1710 | /* |
1711 | * NOTE: At this point, this function is called only if the session and | |
1712 | * channel passed are already created for all apps. and enabled on the | |
1713 | * tracer also. | |
1714 | */ | |
1715 | ||
48842b30 | 1716 | rcu_read_lock(); |
421cb601 DG |
1717 | |
1718 | /* For all registered applications */ | |
5b4a0ec0 | 1719 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
edb67388 DG |
1720 | ua_sess = lookup_session_by_app(usess, app); |
1721 | /* If ua_sess is NULL, there is a code flow error */ | |
1722 | assert(ua_sess); | |
ba767faf | 1723 | |
edb67388 DG |
1724 | /* Lookup channel in the ust app session */ |
1725 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, | |
1726 | strlen(uchan->name), &uiter); | |
1727 | /* If the channel is not found, there is a code flow error */ | |
1728 | assert(ua_chan_node); | |
1729 | ||
1730 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); | |
1731 | ||
35a9059d DG |
1732 | ua_event_node = hashtable_lookup(ua_sess->channels, |
1733 | (void*)uevent->attr.name, strlen(uevent->attr.name), &uiter); | |
1734 | if (ua_event_node == NULL) { | |
1735 | DBG3("UST app enable event %s not found. Skipping app", | |
1736 | uevent->attr.name); | |
1737 | continue; | |
1738 | } | |
1739 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, node); | |
1740 | ||
1741 | ret = enable_ust_app_event(ua_sess, ua_event, app); | |
1742 | if (ret < 0) { | |
1743 | /* XXX: Report error someday... */ | |
1744 | continue; | |
48842b30 | 1745 | } |
edb67388 DG |
1746 | } |
1747 | ||
1748 | rcu_read_unlock(); | |
1749 | ||
1750 | return ret; | |
1751 | } | |
1752 | ||
1753 | /* | |
1754 | * For a specific existing UST session and UST channel, creates the event for | |
1755 | * all registered apps. | |
1756 | */ | |
35a9059d | 1757 | int ust_app_create_event_glb(struct ltt_ust_session *usess, |
edb67388 DG |
1758 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent) |
1759 | { | |
1760 | int ret = 0; | |
1761 | struct cds_lfht_iter iter, uiter; | |
1762 | struct cds_lfht_node *ua_chan_node; | |
1763 | struct ust_app *app; | |
1764 | struct ust_app_session *ua_sess; | |
1765 | struct ust_app_channel *ua_chan; | |
1766 | ||
1767 | DBG("UST app creating event %s for all apps for session uid %d", | |
1768 | uevent->attr.name, usess->uid); | |
1769 | ||
1770 | /* | |
1771 | * NOTE: At this point, this function is called only if the session and | |
1772 | * channel passed are already created for all apps. and enabled on the | |
1773 | * tracer also. | |
1774 | */ | |
1775 | ||
1776 | rcu_read_lock(); | |
1777 | ||
1778 | /* For all registered applications */ | |
1779 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
1780 | ua_sess = lookup_session_by_app(usess, app); | |
1781 | /* If ua_sess is NULL, there is a code flow error */ | |
1782 | assert(ua_sess); | |
48842b30 DG |
1783 | |
1784 | /* Lookup channel in the ust app session */ | |
edb67388 DG |
1785 | ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name, |
1786 | strlen(uchan->name), &uiter); | |
1787 | /* If the channel is not found, there is a code flow error */ | |
1788 | assert(ua_chan_node); | |
1789 | ||
48842b30 DG |
1790 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node); |
1791 | ||
edb67388 DG |
1792 | ret = create_ust_app_event(ua_sess, ua_chan, uevent, app); |
1793 | if (ret < 0) { | |
5b4a0ec0 | 1794 | continue; |
48842b30 | 1795 | } |
48842b30 | 1796 | } |
5b4a0ec0 | 1797 | |
48842b30 DG |
1798 | rcu_read_unlock(); |
1799 | ||
1800 | return ret; | |
1801 | } | |
1802 | ||
5b4a0ec0 DG |
1803 | /* |
1804 | * Start tracing for a specific UST session and app. | |
1805 | */ | |
421cb601 | 1806 | int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app) |
48842b30 DG |
1807 | { |
1808 | int ret = 0; | |
1809 | struct cds_lfht_iter iter; | |
48842b30 DG |
1810 | struct ust_app_session *ua_sess; |
1811 | struct ust_app_channel *ua_chan; | |
5b4a0ec0 | 1812 | struct ltt_ust_stream *ustream; |
7753dea8 | 1813 | int consumerd_fd; |
48842b30 | 1814 | |
421cb601 | 1815 | DBG("Starting tracing for ust app pid %d", app->key.pid); |
5cf5d0e7 | 1816 | |
509cbaf8 MD |
1817 | rcu_read_lock(); |
1818 | ||
421cb601 DG |
1819 | ua_sess = lookup_session_by_app(usess, app); |
1820 | if (ua_sess == NULL) { | |
509cbaf8 | 1821 | goto error_rcu_unlock; |
421cb601 | 1822 | } |
48842b30 | 1823 | |
aea829b3 DG |
1824 | /* Upon restart, we skip the setup, already done */ |
1825 | if (ua_sess->started) { | |
8be98f9a | 1826 | goto skip_setup; |
aea829b3 | 1827 | } |
8be98f9a | 1828 | |
421cb601 DG |
1829 | ret = create_ust_app_metadata(ua_sess, usess->pathname, app); |
1830 | if (ret < 0) { | |
509cbaf8 | 1831 | goto error_rcu_unlock; |
421cb601 | 1832 | } |
48842b30 | 1833 | |
421cb601 | 1834 | /* For each channel */ |
5b4a0ec0 | 1835 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { |
421cb601 DG |
1836 | /* Create all streams */ |
1837 | while (1) { | |
5b4a0ec0 | 1838 | /* Create UST stream */ |
421cb601 DG |
1839 | ustream = zmalloc(sizeof(*ustream)); |
1840 | if (ustream == NULL) { | |
1841 | PERROR("zmalloc ust stream"); | |
509cbaf8 | 1842 | goto error_rcu_unlock; |
421cb601 | 1843 | } |
48842b30 | 1844 | |
421cb601 DG |
1845 | ret = ustctl_create_stream(app->key.sock, ua_chan->obj, |
1846 | &ustream->obj); | |
48842b30 | 1847 | if (ret < 0) { |
421cb601 DG |
1848 | /* Got all streams */ |
1849 | break; | |
48842b30 | 1850 | } |
421cb601 | 1851 | ustream->handle = ustream->obj->handle; |
48842b30 | 1852 | |
421cb601 DG |
1853 | /* Order is important */ |
1854 | cds_list_add_tail(&ustream->list, &ua_chan->streams.head); | |
477d7741 MD |
1855 | ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u", |
1856 | ua_sess->path, ua_chan->name, | |
1857 | ua_chan->streams.count++); | |
aba8e916 DG |
1858 | if (ret < 0) { |
1859 | PERROR("asprintf UST create stream"); | |
421cb601 | 1860 | continue; |
aba8e916 | 1861 | } |
421cb601 DG |
1862 | DBG2("UST stream %d ready at %s", ua_chan->streams.count, |
1863 | ustream->pathname); | |
1864 | } | |
421cb601 | 1865 | } |
aba8e916 | 1866 | |
7753dea8 MD |
1867 | switch (app->bits_per_long) { |
1868 | case 64: | |
1869 | consumerd_fd = ust_consumerd64_fd; | |
1870 | break; | |
1871 | case 32: | |
1872 | consumerd_fd = ust_consumerd32_fd; | |
1873 | break; | |
1874 | default: | |
1875 | ret = -EINVAL; | |
1876 | goto error_rcu_unlock; | |
1877 | } | |
aea829b3 | 1878 | |
421cb601 | 1879 | /* Setup UST consumer socket and send fds to it */ |
7753dea8 | 1880 | ret = ust_consumer_send_session(consumerd_fd, ua_sess); |
421cb601 | 1881 | if (ret < 0) { |
509cbaf8 | 1882 | goto error_rcu_unlock; |
421cb601 | 1883 | } |
8be98f9a | 1884 | ua_sess->started = 1; |
48842b30 | 1885 | |
8be98f9a | 1886 | skip_setup: |
421cb601 DG |
1887 | /* This start the UST tracing */ |
1888 | ret = ustctl_start_session(app->key.sock, ua_sess->handle); | |
1889 | if (ret < 0) { | |
1890 | ERR("Error starting tracing for app pid: %d", app->key.pid); | |
509cbaf8 | 1891 | goto error_rcu_unlock; |
421cb601 | 1892 | } |
5b4a0ec0 | 1893 | |
509cbaf8 | 1894 | rcu_read_unlock(); |
48842b30 | 1895 | |
421cb601 DG |
1896 | /* Quiescent wait after starting trace */ |
1897 | ustctl_wait_quiescent(app->key.sock); | |
48842b30 | 1898 | |
421cb601 | 1899 | return 0; |
48842b30 | 1900 | |
509cbaf8 MD |
1901 | error_rcu_unlock: |
1902 | rcu_read_unlock(); | |
421cb601 DG |
1903 | return -1; |
1904 | } | |
48842b30 | 1905 | |
8be98f9a MD |
1906 | /* |
1907 | * Stop tracing for a specific UST session and app. | |
1908 | */ | |
1909 | int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1910 | { | |
1911 | int ret = 0; | |
1912 | struct ust_app_session *ua_sess; | |
1913 | ||
1914 | DBG("Stopping tracing for ust app pid %d", app->key.pid); | |
1915 | ||
1916 | rcu_read_lock(); | |
1917 | ||
1918 | ua_sess = lookup_session_by_app(usess, app); | |
1919 | if (ua_sess == NULL) { | |
1920 | /* Only malloc can failed so something is really wrong */ | |
1921 | goto error_rcu_unlock; | |
1922 | } | |
1923 | ||
1924 | #if 0 /* only useful when periodical flush will be supported */ | |
1925 | /* need to keep a handle on shm in session for this. */ | |
1926 | /* Flush all buffers before stopping */ | |
1927 | ret = ustctl_flush_buffer(usess->sock, usess->metadata->obj); | |
1928 | if (ret < 0) { | |
1929 | ERR("UST metadata flush failed"); | |
1930 | } | |
1931 | ||
1932 | cds_list_for_each_entry(ustchan, &usess->channels.head, list) { | |
1933 | ret = ustctl_flush_buffer(usess->sock, ustchan->obj); | |
1934 | if (ret < 0) { | |
1935 | ERR("UST flush buffer error"); | |
1936 | } | |
1937 | } | |
1938 | #endif | |
1939 | ||
1940 | /* This inhibits UST tracing */ | |
1941 | ret = ustctl_stop_session(app->key.sock, ua_sess->handle); | |
1942 | if (ret < 0) { | |
1943 | ERR("Error stopping tracing for app pid: %d", app->key.pid); | |
1944 | goto error_rcu_unlock; | |
1945 | } | |
1946 | ||
1947 | rcu_read_unlock(); | |
1948 | ||
1949 | /* Quiescent wait after stopping trace */ | |
1950 | ustctl_wait_quiescent(app->key.sock); | |
1951 | ||
1952 | return 0; | |
1953 | ||
1954 | error_rcu_unlock: | |
1955 | rcu_read_unlock(); | |
1956 | return -1; | |
1957 | } | |
1958 | ||
84cd17c6 MD |
1959 | /* |
1960 | * Destroy a specific UST session in apps. | |
1961 | */ | |
1962 | int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app) | |
1963 | { | |
1964 | struct ust_app_session *ua_sess; | |
1965 | struct lttng_ust_object_data obj; | |
1966 | struct cds_lfht_iter iter; | |
1967 | struct cds_lfht_node *node; | |
525b0740 | 1968 | int ret; |
84cd17c6 MD |
1969 | |
1970 | DBG("Destroy tracing for ust app pid %d", app->key.pid); | |
1971 | ||
1972 | rcu_read_lock(); | |
1973 | ||
1974 | __lookup_session_by_app(usess, app, &iter); | |
1975 | node = hashtable_iter_get_node(&iter); | |
1976 | if (node == NULL) { | |
1977 | /* Only malloc can failed so something is really wrong */ | |
1978 | goto error_rcu_unlock; | |
1979 | } | |
1980 | ua_sess = caa_container_of(node, struct ust_app_session, node); | |
525b0740 MD |
1981 | ret = hashtable_del(app->sessions, &iter); |
1982 | assert(!ret); | |
84cd17c6 MD |
1983 | delete_ust_app_session(app->key.sock, ua_sess); |
1984 | obj.handle = ua_sess->handle; | |
1985 | obj.shm_fd = -1; | |
1986 | obj.wait_fd = -1; | |
1987 | obj.memory_map_size = 0; | |
1988 | ustctl_release_object(app->key.sock, &obj); | |
1989 | ||
1990 | rcu_read_unlock(); | |
1991 | ||
1992 | /* Quiescent wait after stopping trace */ | |
1993 | ustctl_wait_quiescent(app->key.sock); | |
1994 | ||
1995 | return 0; | |
1996 | ||
1997 | error_rcu_unlock: | |
1998 | rcu_read_unlock(); | |
1999 | return -1; | |
2000 | } | |
2001 | ||
5b4a0ec0 DG |
2002 | /* |
2003 | * Start tracing for the UST session. | |
2004 | */ | |
421cb601 DG |
2005 | int ust_app_start_trace_all(struct ltt_ust_session *usess) |
2006 | { | |
2007 | int ret = 0; | |
2008 | struct cds_lfht_iter iter; | |
421cb601 | 2009 | struct ust_app *app; |
48842b30 | 2010 | |
421cb601 DG |
2011 | DBG("Starting all UST traces"); |
2012 | ||
2013 | rcu_read_lock(); | |
421cb601 | 2014 | |
5b4a0ec0 | 2015 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { |
421cb601 | 2016 | ret = ust_app_start_trace(usess, app); |
48842b30 | 2017 | if (ret < 0) { |
5b4a0ec0 DG |
2018 | /* Continue to next apps even on error */ |
2019 | continue; | |
48842b30 | 2020 | } |
48842b30 | 2021 | } |
5b4a0ec0 | 2022 | |
48842b30 DG |
2023 | rcu_read_unlock(); |
2024 | ||
2025 | return 0; | |
2026 | } | |
487cf67c | 2027 | |
8be98f9a MD |
2028 | /* |
2029 | * Start tracing for the UST session. | |
2030 | */ | |
2031 | int ust_app_stop_trace_all(struct ltt_ust_session *usess) | |
2032 | { | |
2033 | int ret = 0; | |
2034 | struct cds_lfht_iter iter; | |
2035 | struct ust_app *app; | |
2036 | ||
2037 | DBG("Stopping all UST traces"); | |
2038 | ||
2039 | rcu_read_lock(); | |
2040 | ||
2041 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
2042 | ret = ust_app_stop_trace(usess, app); | |
2043 | if (ret < 0) { | |
2044 | /* Continue to next apps even on error */ | |
2045 | continue; | |
2046 | } | |
2047 | } | |
2048 | ||
2049 | rcu_read_unlock(); | |
2050 | ||
2051 | return 0; | |
2052 | } | |
2053 | ||
84cd17c6 MD |
2054 | /* |
2055 | * Destroy app UST session. | |
2056 | */ | |
2057 | int ust_app_destroy_trace_all(struct ltt_ust_session *usess) | |
2058 | { | |
2059 | int ret = 0; | |
2060 | struct cds_lfht_iter iter; | |
2061 | struct ust_app *app; | |
2062 | ||
2063 | DBG("Destroy all UST traces"); | |
2064 | ||
2065 | rcu_read_lock(); | |
2066 | ||
2067 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
2068 | ret = ust_app_destroy_trace(usess, app); | |
2069 | if (ret < 0) { | |
2070 | /* Continue to next apps even on error */ | |
2071 | continue; | |
2072 | } | |
2073 | } | |
2074 | ||
2075 | rcu_read_unlock(); | |
2076 | ||
2077 | return 0; | |
2078 | } | |
2079 | ||
5b4a0ec0 DG |
2080 | /* |
2081 | * Add channels/events from UST global domain to registered apps at sock. | |
2082 | */ | |
487cf67c DG |
2083 | void ust_app_global_update(struct ltt_ust_session *usess, int sock) |
2084 | { | |
2085 | int ret = 0; | |
487cf67c | 2086 | struct cds_lfht_iter iter; |
487cf67c DG |
2087 | struct ust_app *app; |
2088 | struct ust_app_session *ua_sess; | |
2089 | struct ust_app_channel *ua_chan; | |
2090 | struct ust_app_event *ua_event; | |
1f3580c7 DG |
2091 | |
2092 | if (usess == NULL) { | |
5b4a0ec0 | 2093 | ERR("No UST session on global update. Returning"); |
1f3580c7 DG |
2094 | goto error; |
2095 | } | |
2096 | ||
487cf67c DG |
2097 | DBG2("UST app global update for app sock %d for session uid %d", sock, |
2098 | usess->uid); | |
2099 | ||
284d8f55 DG |
2100 | rcu_read_lock(); |
2101 | ||
487cf67c DG |
2102 | app = find_app_by_sock(sock); |
2103 | if (app == NULL) { | |
2104 | ERR("Failed to update app sock %d", sock); | |
2105 | goto error; | |
2106 | } | |
2107 | ||
421cb601 | 2108 | ua_sess = create_ust_app_session(usess, app); |
487cf67c | 2109 | if (ua_sess == NULL) { |
487cf67c DG |
2110 | goto error; |
2111 | } | |
2112 | ||
284d8f55 DG |
2113 | /* |
2114 | * We can iterate safely here over all UST app session sicne the create ust | |
2115 | * app session above made a shadow copy of the UST global domain from the | |
2116 | * ltt ust session. | |
2117 | */ | |
2118 | cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) { | |
2119 | ret = create_ust_channel(app, ua_sess, ua_chan); | |
2120 | if (ret < 0) { | |
2121 | /* FIXME: Should we quit here or continue... */ | |
2122 | continue; | |
487cf67c DG |
2123 | } |
2124 | ||
284d8f55 DG |
2125 | /* For each events */ |
2126 | cds_lfht_for_each_entry(ua_chan->events, &iter, ua_event, node) { | |
2127 | ret = create_ust_event(app, ua_sess, ua_chan, ua_event); | |
2128 | if (ret < 0) { | |
2129 | /* FIXME: Should we quit here or continue... */ | |
2130 | continue; | |
487cf67c | 2131 | } |
36dc12cc | 2132 | } |
487cf67c DG |
2133 | } |
2134 | ||
36dc12cc | 2135 | if (usess->start_trace) { |
421cb601 | 2136 | ret = ust_app_start_trace(usess, app); |
36dc12cc | 2137 | if (ret < 0) { |
36dc12cc DG |
2138 | goto error; |
2139 | } | |
2140 | ||
36dc12cc DG |
2141 | DBG2("UST trace started for app pid %d", app->key.pid); |
2142 | } | |
2143 | ||
487cf67c DG |
2144 | error: |
2145 | rcu_read_unlock(); | |
2146 | return; | |
2147 | } | |
55cc08a6 DG |
2148 | |
2149 | /* | |
2150 | * Add context to a specific channel for global UST domain. | |
2151 | */ | |
2152 | int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess, | |
2153 | struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx) | |
2154 | { | |
2155 | int ret = 0; | |
2156 | struct cds_lfht_node *ua_chan_node; | |
2157 | struct cds_lfht_iter iter, uiter; | |
2158 | struct ust_app_channel *ua_chan = NULL; | |
2159 | struct ust_app_session *ua_sess; | |
2160 | struct ust_app *app; | |
2161 | ||
2162 | rcu_read_lock(); | |
2163 | ||
2164 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
2165 | ua_sess = lookup_session_by_app(usess, app); | |
2166 | if (ua_sess == NULL) { | |
2167 | continue; | |
2168 | } | |
2169 | ||
2170 | /* Lookup channel in the ust app session */ | |
2171 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
2172 | (void *)uchan->name, strlen(uchan->name), &uiter); | |
2173 | if (ua_chan_node == NULL) { | |
2174 | continue; | |
2175 | } | |
2176 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2177 | node); | |
2178 | ||
2179 | ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app); | |
2180 | if (ret < 0) { | |
2181 | continue; | |
2182 | } | |
2183 | } | |
2184 | ||
2185 | /* Add ltt UST context node to ltt UST channel */ | |
2186 | hashtable_add_unique(uchan->ctx, &uctx->node); | |
2187 | ||
2188 | rcu_read_unlock(); | |
2189 | return ret; | |
2190 | } | |
2191 | ||
2192 | /* | |
2193 | * Add context to a specific event in a channel for global UST domain. | |
2194 | */ | |
2195 | int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess, | |
2196 | struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent, | |
2197 | struct ltt_ust_context *uctx) | |
2198 | { | |
2199 | int ret = 0; | |
2200 | struct cds_lfht_node *ua_chan_node, *ua_event_node; | |
2201 | struct cds_lfht_iter iter, uiter; | |
2202 | struct ust_app_session *ua_sess; | |
2203 | struct ust_app_event *ua_event; | |
2204 | struct ust_app_channel *ua_chan = NULL; | |
2205 | struct ust_app *app; | |
2206 | ||
2207 | rcu_read_lock(); | |
2208 | ||
2209 | cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) { | |
2210 | ua_sess = lookup_session_by_app(usess, app); | |
2211 | if (ua_sess == NULL) { | |
2212 | continue; | |
2213 | } | |
2214 | ||
2215 | /* Lookup channel in the ust app session */ | |
2216 | ua_chan_node = hashtable_lookup(ua_sess->channels, | |
2217 | (void *)uchan->name, strlen(uchan->name), &uiter); | |
2218 | if (ua_chan_node == NULL) { | |
2219 | continue; | |
2220 | } | |
2221 | ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, | |
2222 | node); | |
2223 | ||
2224 | ua_event_node = hashtable_lookup(ua_chan->events, | |
2225 | (void *)uevent->attr.name, strlen(uevent->attr.name), &uiter); | |
2226 | if (ua_event_node == NULL) { | |
2227 | continue; | |
2228 | } | |
2229 | ua_event = caa_container_of(ua_event_node, struct ust_app_event, | |
2230 | node); | |
2231 | ||
2232 | ret = create_ust_app_event_context(ua_sess, ua_event, &uctx->ctx, app); | |
2233 | if (ret < 0) { | |
2234 | continue; | |
2235 | } | |
2236 | } | |
2237 | ||
2238 | /* Add ltt UST context node to ltt UST event */ | |
2239 | hashtable_add_unique(uevent->ctx, &uctx->node); | |
2240 | ||
2241 | rcu_read_unlock(); | |
2242 | return ret; | |
2243 | } |