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