Commit | Line | Data |
---|---|---|
917a718d | 1 | /* |
a4eb26f0 | 2 | * Copyright (C) 2011 EfficiOS Inc. |
ab5be9fa MJ |
3 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
4 | * Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
917a718d | 5 | * |
ab5be9fa | 6 | * SPDX-License-Identifier: GPL-2.0-only |
917a718d | 7 | * |
917a718d JG |
8 | */ |
9 | ||
f953b297 JG |
10 | #include "common/buffer-view.h" |
11 | #include "common/dynamic-buffer.h" | |
12 | #include "common/sessiond-comm/sessiond-comm.h" | |
13 | #include "lttng/lttng-error.h" | |
14 | #include "lttng/tracker.h" | |
917a718d | 15 | #include <common/compat/getenv.h> |
f953b297 | 16 | #include <common/tracker.h> |
917a718d JG |
17 | #include <common/unix.h> |
18 | #include <common/utils.h> | |
917a718d | 19 | #include <lttng/event-internal.h> |
b178f53e | 20 | #include <lttng/session-descriptor-internal.h> |
f953b297 JG |
21 | #include <lttng/session-internal.h> |
22 | #include <lttng/userspace-probe-internal.h> | |
23 | #include <pthread.h> | |
24 | #include <signal.h> | |
25 | #include <stddef.h> | |
33b9609d | 26 | #include <stdint.h> |
f953b297 | 27 | #include <sys/stat.h> |
917a718d JG |
28 | |
29 | #include "client.h" | |
30 | #include "lttng-sessiond.h" | |
31 | #include "cmd.h" | |
32 | #include "kernel.h" | |
33 | #include "save.h" | |
34 | #include "health-sessiond.h" | |
35 | #include "testpoint.h" | |
36 | #include "utils.h" | |
4ec029ed | 37 | #include "manage-consumer.h" |
022349df | 38 | #include "clear.h" |
917a718d JG |
39 | |
40 | static bool is_root; | |
41 | ||
42 | static struct thread_state { | |
6cb45e93 JG |
43 | sem_t ready; |
44 | bool running; | |
0f68efb6 | 45 | int client_sock; |
6cb45e93 JG |
46 | } thread_state; |
47 | ||
48 | static void set_thread_status(bool running) | |
917a718d | 49 | { |
6cb45e93 JG |
50 | DBG("Marking client thread's state as %s", running ? "running" : "error"); |
51 | thread_state.running = running; | |
52 | sem_post(&thread_state.ready); | |
917a718d JG |
53 | } |
54 | ||
6cb45e93 | 55 | static bool wait_thread_status(void) |
917a718d | 56 | { |
6cb45e93 JG |
57 | DBG("Waiting for client thread to be ready"); |
58 | sem_wait(&thread_state.ready); | |
59 | if (thread_state.running) { | |
60 | DBG("Client thread is ready"); | |
61 | } else { | |
62 | ERR("Initialization of client thread failed"); | |
917a718d | 63 | } |
6cb45e93 JG |
64 | |
65 | return thread_state.running; | |
917a718d JG |
66 | } |
67 | ||
68 | /* | |
69 | * Setup the outgoing data buffer for the response (llm) by allocating the | |
70 | * right amount of memory and copying the original information from the lsm | |
71 | * structure. | |
72 | * | |
73 | * Return 0 on success, negative value on error. | |
74 | */ | |
75 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, | |
76 | const void *payload_buf, size_t payload_len, | |
77 | const void *cmd_header_buf, size_t cmd_header_len) | |
78 | { | |
79 | int ret = 0; | |
80 | const size_t header_len = sizeof(struct lttcomm_lttng_msg); | |
81 | const size_t cmd_header_offset = header_len; | |
82 | const size_t payload_offset = cmd_header_offset + cmd_header_len; | |
83 | const size_t total_msg_size = header_len + cmd_header_len + payload_len; | |
84 | ||
99a98ed3 | 85 | free(cmd_ctx->llm); |
917a718d JG |
86 | cmd_ctx->llm = zmalloc(total_msg_size); |
87 | ||
88 | if (cmd_ctx->llm == NULL) { | |
89 | PERROR("zmalloc"); | |
90 | ret = -ENOMEM; | |
91 | goto end; | |
92 | } | |
93 | ||
94 | /* Copy common data */ | |
95 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
96 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; | |
97 | cmd_ctx->llm->cmd_header_size = cmd_header_len; | |
98 | cmd_ctx->llm->data_size = payload_len; | |
99 | cmd_ctx->lttng_msg_size = total_msg_size; | |
100 | ||
101 | /* Copy command header */ | |
102 | if (cmd_header_len) { | |
103 | memcpy(((uint8_t *) cmd_ctx->llm) + cmd_header_offset, cmd_header_buf, | |
104 | cmd_header_len); | |
105 | } | |
106 | ||
107 | /* Copy payload */ | |
108 | if (payload_len) { | |
109 | memcpy(((uint8_t *) cmd_ctx->llm) + payload_offset, payload_buf, | |
110 | payload_len); | |
111 | } | |
112 | ||
113 | end: | |
114 | return ret; | |
115 | } | |
116 | ||
117 | /* | |
118 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd | |
4ec029ed | 119 | * exec or it will fail. |
917a718d JG |
120 | */ |
121 | static int spawn_consumer_thread(struct consumer_data *consumer_data) | |
122 | { | |
4ec029ed | 123 | return launch_consumer_management_thread(consumer_data) ? 0 : -1; |
917a718d JG |
124 | } |
125 | ||
126 | /* | |
127 | * Fork and exec a consumer daemon (consumerd). | |
128 | * | |
129 | * Return pid if successful else -1. | |
130 | */ | |
131 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) | |
132 | { | |
133 | int ret; | |
134 | pid_t pid; | |
135 | const char *consumer_to_use; | |
136 | const char *verbosity; | |
137 | struct stat st; | |
138 | ||
139 | DBG("Spawning consumerd"); | |
140 | ||
141 | pid = fork(); | |
142 | if (pid == 0) { | |
143 | /* | |
144 | * Exec consumerd. | |
145 | */ | |
146 | if (config.verbose_consumer) { | |
147 | verbosity = "--verbose"; | |
148 | } else if (lttng_opt_quiet) { | |
149 | verbosity = "--quiet"; | |
150 | } else { | |
151 | verbosity = ""; | |
152 | } | |
153 | ||
154 | switch (consumer_data->type) { | |
155 | case LTTNG_CONSUMER_KERNEL: | |
156 | /* | |
157 | * Find out which consumerd to execute. We will first try the | |
158 | * 64-bit path, then the sessiond's installation directory, and | |
159 | * fallback on the 32-bit one, | |
160 | */ | |
161 | DBG3("Looking for a kernel consumer at these locations:"); | |
162 | DBG3(" 1) %s", config.consumerd64_bin_path.value ? : "NULL"); | |
163 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, DEFAULT_CONSUMERD_FILE); | |
164 | DBG3(" 3) %s", config.consumerd32_bin_path.value ? : "NULL"); | |
165 | if (stat(config.consumerd64_bin_path.value, &st) == 0) { | |
166 | DBG3("Found location #1"); | |
167 | consumer_to_use = config.consumerd64_bin_path.value; | |
168 | } else if (stat(INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE, &st) == 0) { | |
169 | DBG3("Found location #2"); | |
170 | consumer_to_use = INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE; | |
171 | } else if (config.consumerd32_bin_path.value && | |
172 | stat(config.consumerd32_bin_path.value, &st) == 0) { | |
173 | DBG3("Found location #3"); | |
174 | consumer_to_use = config.consumerd32_bin_path.value; | |
175 | } else { | |
176 | DBG("Could not find any valid consumerd executable"); | |
177 | ret = -EINVAL; | |
178 | goto error; | |
179 | } | |
180 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
181 | (void) execl(consumer_to_use, | |
182 | "lttng-consumerd", verbosity, "-k", | |
183 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
184 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
185 | "--group", config.tracing_group_name.value, | |
186 | NULL); | |
187 | break; | |
188 | case LTTNG_CONSUMER64_UST: | |
189 | { | |
190 | if (config.consumerd64_lib_dir.value) { | |
cea15630 | 191 | const char *tmp; |
917a718d JG |
192 | size_t tmplen; |
193 | char *tmpnew; | |
194 | ||
195 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); | |
196 | if (!tmp) { | |
197 | tmp = ""; | |
198 | } | |
199 | tmplen = strlen(config.consumerd64_lib_dir.value) + 1 /* : */ + strlen(tmp); | |
200 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
201 | if (!tmpnew) { | |
202 | ret = -ENOMEM; | |
203 | goto error; | |
204 | } | |
205 | strcat(tmpnew, config.consumerd64_lib_dir.value); | |
206 | if (tmp[0] != '\0') { | |
207 | strcat(tmpnew, ":"); | |
208 | strcat(tmpnew, tmp); | |
209 | } | |
210 | ret = setenv("LD_LIBRARY_PATH", tmpnew, 1); | |
211 | free(tmpnew); | |
212 | if (ret) { | |
213 | ret = -errno; | |
214 | goto error; | |
215 | } | |
216 | } | |
217 | DBG("Using 64-bit UST consumer at: %s", config.consumerd64_bin_path.value); | |
218 | (void) execl(config.consumerd64_bin_path.value, "lttng-consumerd", verbosity, "-u", | |
219 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
220 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
221 | "--group", config.tracing_group_name.value, | |
222 | NULL); | |
223 | break; | |
224 | } | |
225 | case LTTNG_CONSUMER32_UST: | |
226 | { | |
227 | if (config.consumerd32_lib_dir.value) { | |
cea15630 | 228 | const char *tmp; |
917a718d JG |
229 | size_t tmplen; |
230 | char *tmpnew; | |
231 | ||
232 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); | |
233 | if (!tmp) { | |
234 | tmp = ""; | |
235 | } | |
236 | tmplen = strlen(config.consumerd32_lib_dir.value) + 1 /* : */ + strlen(tmp); | |
237 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
238 | if (!tmpnew) { | |
239 | ret = -ENOMEM; | |
240 | goto error; | |
241 | } | |
242 | strcat(tmpnew, config.consumerd32_lib_dir.value); | |
243 | if (tmp[0] != '\0') { | |
244 | strcat(tmpnew, ":"); | |
245 | strcat(tmpnew, tmp); | |
246 | } | |
247 | ret = setenv("LD_LIBRARY_PATH", tmpnew, 1); | |
248 | free(tmpnew); | |
249 | if (ret) { | |
250 | ret = -errno; | |
251 | goto error; | |
252 | } | |
253 | } | |
254 | DBG("Using 32-bit UST consumer at: %s", config.consumerd32_bin_path.value); | |
255 | (void) execl(config.consumerd32_bin_path.value, "lttng-consumerd", verbosity, "-u", | |
256 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
257 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
258 | "--group", config.tracing_group_name.value, | |
259 | NULL); | |
260 | break; | |
261 | } | |
262 | default: | |
263 | ERR("unknown consumer type"); | |
264 | errno = 0; | |
265 | } | |
266 | if (errno != 0) { | |
267 | PERROR("Consumer execl()"); | |
268 | } | |
269 | /* Reaching this point, we got a failure on our execl(). */ | |
270 | exit(EXIT_FAILURE); | |
271 | } else if (pid > 0) { | |
272 | ret = pid; | |
273 | } else { | |
274 | PERROR("start consumer fork"); | |
275 | ret = -errno; | |
276 | } | |
277 | error: | |
278 | return ret; | |
279 | } | |
280 | ||
281 | /* | |
282 | * Spawn the consumerd daemon and session daemon thread. | |
283 | */ | |
284 | static int start_consumerd(struct consumer_data *consumer_data) | |
285 | { | |
286 | int ret; | |
287 | ||
288 | /* | |
289 | * Set the listen() state on the socket since there is a possible race | |
290 | * between the exec() of the consumer daemon and this call if place in the | |
291 | * consumer thread. See bug #366 for more details. | |
292 | */ | |
293 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
294 | if (ret < 0) { | |
295 | goto error; | |
296 | } | |
297 | ||
298 | pthread_mutex_lock(&consumer_data->pid_mutex); | |
299 | if (consumer_data->pid != 0) { | |
300 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
301 | goto end; | |
302 | } | |
303 | ||
304 | ret = spawn_consumerd(consumer_data); | |
305 | if (ret < 0) { | |
306 | ERR("Spawning consumerd failed"); | |
307 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
308 | goto error; | |
309 | } | |
310 | ||
311 | /* Setting up the consumer_data pid */ | |
312 | consumer_data->pid = ret; | |
313 | DBG2("Consumer pid %d", consumer_data->pid); | |
314 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
315 | ||
316 | DBG2("Spawning consumer control thread"); | |
317 | ret = spawn_consumer_thread(consumer_data); | |
318 | if (ret < 0) { | |
319 | ERR("Fatal error spawning consumer control thread"); | |
320 | goto error; | |
321 | } | |
322 | ||
323 | end: | |
324 | return 0; | |
325 | ||
326 | error: | |
327 | /* Cleanup already created sockets on error. */ | |
328 | if (consumer_data->err_sock >= 0) { | |
329 | int err; | |
330 | ||
331 | err = close(consumer_data->err_sock); | |
332 | if (err < 0) { | |
333 | PERROR("close consumer data error socket"); | |
334 | } | |
335 | } | |
336 | return ret; | |
337 | } | |
338 | ||
339 | /* | |
340 | * Copy consumer output from the tracing session to the domain session. The | |
341 | * function also applies the right modification on a per domain basis for the | |
342 | * trace files destination directory. | |
343 | * | |
344 | * Should *NOT* be called with RCU read-side lock held. | |
345 | */ | |
346 | static int copy_session_consumer(int domain, struct ltt_session *session) | |
347 | { | |
348 | int ret; | |
349 | const char *dir_name; | |
350 | struct consumer_output *consumer; | |
351 | ||
352 | assert(session); | |
353 | assert(session->consumer); | |
354 | ||
355 | switch (domain) { | |
356 | case LTTNG_DOMAIN_KERNEL: | |
357 | DBG3("Copying tracing session consumer output in kernel session"); | |
358 | /* | |
359 | * XXX: We should audit the session creation and what this function | |
360 | * does "extra" in order to avoid a destroy since this function is used | |
361 | * in the domain session creation (kernel and ust) only. Same for UST | |
362 | * domain. | |
363 | */ | |
364 | if (session->kernel_session->consumer) { | |
365 | consumer_output_put(session->kernel_session->consumer); | |
366 | } | |
367 | session->kernel_session->consumer = | |
368 | consumer_copy_output(session->consumer); | |
369 | /* Ease our life a bit for the next part */ | |
370 | consumer = session->kernel_session->consumer; | |
371 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
372 | break; | |
373 | case LTTNG_DOMAIN_JUL: | |
374 | case LTTNG_DOMAIN_LOG4J: | |
375 | case LTTNG_DOMAIN_PYTHON: | |
376 | case LTTNG_DOMAIN_UST: | |
377 | DBG3("Copying tracing session consumer output in UST session"); | |
378 | if (session->ust_session->consumer) { | |
379 | consumer_output_put(session->ust_session->consumer); | |
380 | } | |
381 | session->ust_session->consumer = | |
382 | consumer_copy_output(session->consumer); | |
383 | /* Ease our life a bit for the next part */ | |
384 | consumer = session->ust_session->consumer; | |
385 | dir_name = DEFAULT_UST_TRACE_DIR; | |
386 | break; | |
387 | default: | |
388 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
389 | goto error; | |
390 | } | |
391 | ||
392 | /* Append correct directory to subdir */ | |
b178f53e JG |
393 | ret = lttng_strncpy(consumer->domain_subdir, dir_name, |
394 | sizeof(consumer->domain_subdir)); | |
395 | if (ret) { | |
396 | ret = LTTNG_ERR_UNK; | |
397 | goto error; | |
398 | } | |
399 | DBG3("Copy session consumer subdir %s", consumer->domain_subdir); | |
917a718d JG |
400 | ret = LTTNG_OK; |
401 | ||
402 | error: | |
403 | return ret; | |
404 | } | |
405 | ||
406 | /* | |
407 | * Create an UST session and add it to the session ust list. | |
408 | * | |
409 | * Should *NOT* be called with RCU read-side lock held. | |
410 | */ | |
411 | static int create_ust_session(struct ltt_session *session, | |
df4f5a87 | 412 | const struct lttng_domain *domain) |
917a718d JG |
413 | { |
414 | int ret; | |
415 | struct ltt_ust_session *lus = NULL; | |
416 | ||
417 | assert(session); | |
418 | assert(domain); | |
419 | assert(session->consumer); | |
420 | ||
421 | switch (domain->type) { | |
422 | case LTTNG_DOMAIN_JUL: | |
423 | case LTTNG_DOMAIN_LOG4J: | |
424 | case LTTNG_DOMAIN_PYTHON: | |
425 | case LTTNG_DOMAIN_UST: | |
426 | break; | |
427 | default: | |
428 | ERR("Unknown UST domain on create session %d", domain->type); | |
429 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
430 | goto error; | |
431 | } | |
432 | ||
433 | DBG("Creating UST session"); | |
434 | ||
435 | lus = trace_ust_create_session(session->id); | |
436 | if (lus == NULL) { | |
437 | ret = LTTNG_ERR_UST_SESS_FAIL; | |
438 | goto error; | |
439 | } | |
440 | ||
441 | lus->uid = session->uid; | |
442 | lus->gid = session->gid; | |
443 | lus->output_traces = session->output_traces; | |
444 | lus->snapshot_mode = session->snapshot_mode; | |
445 | lus->live_timer_interval = session->live_timer; | |
446 | session->ust_session = lus; | |
447 | if (session->shm_path[0]) { | |
448 | strncpy(lus->root_shm_path, session->shm_path, | |
449 | sizeof(lus->root_shm_path)); | |
450 | lus->root_shm_path[sizeof(lus->root_shm_path) - 1] = '\0'; | |
451 | strncpy(lus->shm_path, session->shm_path, | |
452 | sizeof(lus->shm_path)); | |
453 | lus->shm_path[sizeof(lus->shm_path) - 1] = '\0'; | |
454 | strncat(lus->shm_path, "/ust", | |
455 | sizeof(lus->shm_path) - strlen(lus->shm_path) - 1); | |
456 | } | |
457 | /* Copy session output to the newly created UST session */ | |
458 | ret = copy_session_consumer(domain->type, session); | |
459 | if (ret != LTTNG_OK) { | |
460 | goto error; | |
461 | } | |
462 | ||
463 | return LTTNG_OK; | |
464 | ||
465 | error: | |
466 | free(lus); | |
467 | session->ust_session = NULL; | |
468 | return ret; | |
469 | } | |
470 | ||
471 | /* | |
472 | * Create a kernel tracer session then create the default channel. | |
473 | */ | |
474 | static int create_kernel_session(struct ltt_session *session) | |
475 | { | |
476 | int ret; | |
477 | ||
478 | DBG("Creating kernel session"); | |
479 | ||
7d268848 | 480 | ret = kernel_create_session(session); |
917a718d JG |
481 | if (ret < 0) { |
482 | ret = LTTNG_ERR_KERN_SESS_FAIL; | |
5d0a7bcb | 483 | goto error_create; |
917a718d JG |
484 | } |
485 | ||
486 | /* Code flow safety */ | |
487 | assert(session->kernel_session); | |
488 | ||
489 | /* Copy session output to the newly created Kernel session */ | |
490 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
491 | if (ret != LTTNG_OK) { | |
492 | goto error; | |
493 | } | |
494 | ||
495 | session->kernel_session->uid = session->uid; | |
496 | session->kernel_session->gid = session->gid; | |
497 | session->kernel_session->output_traces = session->output_traces; | |
498 | session->kernel_session->snapshot_mode = session->snapshot_mode; | |
ee8935c3 | 499 | session->kernel_session->is_live_session = session->live_timer != 0; |
917a718d JG |
500 | |
501 | return LTTNG_OK; | |
502 | ||
503 | error: | |
504 | trace_kernel_destroy_session(session->kernel_session); | |
505 | session->kernel_session = NULL; | |
5d0a7bcb | 506 | error_create: |
917a718d JG |
507 | return ret; |
508 | } | |
509 | ||
510 | /* | |
511 | * Count number of session permitted by uid/gid. | |
512 | */ | |
513 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
514 | { | |
515 | unsigned int i = 0; | |
516 | struct ltt_session *session; | |
517 | const struct ltt_session_list *session_list = session_get_list(); | |
518 | ||
519 | DBG("Counting number of available session for UID %d GID %d", | |
520 | uid, gid); | |
521 | cds_list_for_each_entry(session, &session_list->head, list) { | |
522 | if (!session_get(session)) { | |
523 | continue; | |
524 | } | |
525 | session_lock(session); | |
526 | /* Only count the sessions the user can control. */ | |
527 | if (session_access_ok(session, uid, gid) && | |
528 | !session->destroyed) { | |
529 | i++; | |
530 | } | |
531 | session_unlock(session); | |
532 | session_put(session); | |
533 | } | |
534 | return i; | |
535 | } | |
536 | ||
917a718d JG |
537 | /* |
538 | * Version of setup_lttng_msg() without command header. | |
539 | */ | |
540 | static int setup_lttng_msg_no_cmd_header(struct command_ctx *cmd_ctx, | |
541 | void *payload_buf, size_t payload_len) | |
542 | { | |
543 | return setup_lttng_msg(cmd_ctx, payload_buf, payload_len, NULL, 0); | |
544 | } | |
545 | ||
546 | /* | |
547 | * Free memory of a command context structure. | |
548 | */ | |
549 | static void clean_command_ctx(struct command_ctx **cmd_ctx) | |
550 | { | |
551 | DBG("Clean command context structure"); | |
552 | if (*cmd_ctx) { | |
553 | if ((*cmd_ctx)->llm) { | |
554 | free((*cmd_ctx)->llm); | |
555 | } | |
556 | if ((*cmd_ctx)->lsm) { | |
557 | free((*cmd_ctx)->lsm); | |
558 | } | |
559 | free(*cmd_ctx); | |
560 | *cmd_ctx = NULL; | |
561 | } | |
562 | } | |
563 | ||
564 | /* | |
565 | * Check if the current kernel tracer supports the session rotation feature. | |
566 | * Return 1 if it does, 0 otherwise. | |
567 | */ | |
568 | static int check_rotate_compatible(void) | |
569 | { | |
570 | int ret = 1; | |
571 | ||
572 | if (kernel_tracer_version.major != 2 || kernel_tracer_version.minor < 11) { | |
573 | DBG("Kernel tracer version is not compatible with the rotation feature"); | |
574 | ret = 0; | |
575 | } | |
576 | ||
577 | return ret; | |
578 | } | |
579 | ||
580 | /* | |
581 | * Send data on a unix socket using the liblttsessiondcomm API. | |
582 | * | |
583 | * Return lttcomm error code. | |
584 | */ | |
585 | static int send_unix_sock(int sock, void *buf, size_t len) | |
586 | { | |
587 | /* Check valid length */ | |
588 | if (len == 0) { | |
589 | return -1; | |
590 | } | |
591 | ||
592 | return lttcomm_send_unix_sock(sock, buf, len); | |
593 | } | |
594 | ||
595 | /* | |
596 | * Process the command requested by the lttng client within the command | |
597 | * context structure. This function make sure that the return structure (llm) | |
598 | * is set and ready for transmission before returning. | |
599 | * | |
600 | * Return any error encountered or 0 for success. | |
601 | * | |
602 | * "sock" is only used for special-case var. len data. | |
3e3665b8 JG |
603 | * A command may assume the ownership of the socket, in which case its value |
604 | * should be set to -1. | |
917a718d JG |
605 | * |
606 | * Should *NOT* be called with RCU read-side lock held. | |
607 | */ | |
3e3665b8 | 608 | static int process_client_msg(struct command_ctx *cmd_ctx, int *sock, |
917a718d JG |
609 | int *sock_error) |
610 | { | |
611 | int ret = LTTNG_OK; | |
612 | int need_tracing_session = 1; | |
613 | int need_domain; | |
33b9609d JR |
614 | struct lttng_dynamic_buffer payload; |
615 | ||
616 | lttng_dynamic_buffer_init(&payload); | |
917a718d JG |
617 | |
618 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
619 | ||
620 | assert(!rcu_read_ongoing()); | |
621 | ||
622 | *sock_error = 0; | |
623 | ||
624 | switch (cmd_ctx->lsm->cmd_type) { | |
b178f53e | 625 | case LTTNG_CREATE_SESSION_EXT: |
917a718d JG |
626 | case LTTNG_DESTROY_SESSION: |
627 | case LTTNG_LIST_SESSIONS: | |
628 | case LTTNG_LIST_DOMAINS: | |
629 | case LTTNG_START_TRACE: | |
630 | case LTTNG_STOP_TRACE: | |
631 | case LTTNG_DATA_PENDING: | |
632 | case LTTNG_SNAPSHOT_ADD_OUTPUT: | |
633 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
634 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
635 | case LTTNG_SNAPSHOT_RECORD: | |
636 | case LTTNG_SAVE_SESSION: | |
637 | case LTTNG_SET_SESSION_SHM_PATH: | |
638 | case LTTNG_REGENERATE_METADATA: | |
639 | case LTTNG_REGENERATE_STATEDUMP: | |
640 | case LTTNG_REGISTER_TRIGGER: | |
641 | case LTTNG_UNREGISTER_TRIGGER: | |
642 | case LTTNG_ROTATE_SESSION: | |
643 | case LTTNG_ROTATION_GET_INFO: | |
644 | case LTTNG_ROTATION_SET_SCHEDULE: | |
645 | case LTTNG_SESSION_LIST_ROTATION_SCHEDULES: | |
022349df | 646 | case LTTNG_CLEAR_SESSION: |
917a718d JG |
647 | need_domain = 0; |
648 | break; | |
649 | default: | |
650 | need_domain = 1; | |
651 | } | |
652 | ||
653 | if (config.no_kernel && need_domain | |
654 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
655 | if (!is_root) { | |
656 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; | |
657 | } else { | |
658 | ret = LTTNG_ERR_KERN_NA; | |
659 | } | |
660 | goto error; | |
661 | } | |
662 | ||
663 | /* Deny register consumer if we already have a spawned consumer. */ | |
664 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
665 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
666 | if (kconsumer_data.pid > 0) { | |
667 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; | |
668 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
669 | goto error; | |
670 | } | |
671 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
672 | } | |
673 | ||
674 | /* | |
675 | * Check for command that don't needs to allocate a returned payload. We do | |
676 | * this here so we don't have to make the call for no payload at each | |
677 | * command. | |
678 | */ | |
679 | switch(cmd_ctx->lsm->cmd_type) { | |
680 | case LTTNG_LIST_SESSIONS: | |
681 | case LTTNG_LIST_TRACEPOINTS: | |
682 | case LTTNG_LIST_TRACEPOINT_FIELDS: | |
683 | case LTTNG_LIST_DOMAINS: | |
684 | case LTTNG_LIST_CHANNELS: | |
685 | case LTTNG_LIST_EVENTS: | |
686 | case LTTNG_LIST_SYSCALLS: | |
f953b297 JG |
687 | case LTTNG_SESSION_LIST_ROTATION_SCHEDULES: |
688 | case LTTNG_PROCESS_ATTR_TRACKER_GET_POLICY: | |
689 | case LTTNG_PROCESS_ATTR_TRACKER_GET_INCLUSION_SET: | |
917a718d JG |
690 | case LTTNG_DATA_PENDING: |
691 | case LTTNG_ROTATE_SESSION: | |
692 | case LTTNG_ROTATION_GET_INFO: | |
917a718d JG |
693 | break; |
694 | default: | |
695 | /* Setup lttng message with no payload */ | |
696 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0); | |
697 | if (ret < 0) { | |
698 | /* This label does not try to unlock the session */ | |
699 | goto init_setup_error; | |
700 | } | |
701 | } | |
702 | ||
703 | /* Commands that DO NOT need a session. */ | |
704 | switch (cmd_ctx->lsm->cmd_type) { | |
b178f53e | 705 | case LTTNG_CREATE_SESSION_EXT: |
917a718d JG |
706 | case LTTNG_LIST_SESSIONS: |
707 | case LTTNG_LIST_TRACEPOINTS: | |
708 | case LTTNG_LIST_SYSCALLS: | |
709 | case LTTNG_LIST_TRACEPOINT_FIELDS: | |
710 | case LTTNG_SAVE_SESSION: | |
711 | case LTTNG_REGISTER_TRIGGER: | |
712 | case LTTNG_UNREGISTER_TRIGGER: | |
713 | need_tracing_session = 0; | |
714 | break; | |
715 | default: | |
716 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
717 | /* | |
718 | * We keep the session list lock across _all_ commands | |
719 | * for now, because the per-session lock does not | |
720 | * handle teardown properly. | |
721 | */ | |
722 | session_lock_list(); | |
723 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); | |
724 | if (cmd_ctx->session == NULL) { | |
725 | ret = LTTNG_ERR_SESS_NOT_FOUND; | |
726 | goto error; | |
727 | } else { | |
728 | /* Acquire lock for the session */ | |
729 | session_lock(cmd_ctx->session); | |
730 | } | |
731 | break; | |
732 | } | |
733 | ||
734 | /* | |
735 | * Commands that need a valid session but should NOT create one if none | |
736 | * exists. Instead of creating one and destroying it when the command is | |
737 | * handled, process that right before so we save some round trip in useless | |
738 | * code path. | |
739 | */ | |
740 | switch (cmd_ctx->lsm->cmd_type) { | |
741 | case LTTNG_DISABLE_CHANNEL: | |
742 | case LTTNG_DISABLE_EVENT: | |
743 | switch (cmd_ctx->lsm->domain.type) { | |
744 | case LTTNG_DOMAIN_KERNEL: | |
745 | if (!cmd_ctx->session->kernel_session) { | |
746 | ret = LTTNG_ERR_NO_CHANNEL; | |
747 | goto error; | |
748 | } | |
749 | break; | |
750 | case LTTNG_DOMAIN_JUL: | |
751 | case LTTNG_DOMAIN_LOG4J: | |
752 | case LTTNG_DOMAIN_PYTHON: | |
753 | case LTTNG_DOMAIN_UST: | |
754 | if (!cmd_ctx->session->ust_session) { | |
755 | ret = LTTNG_ERR_NO_CHANNEL; | |
756 | goto error; | |
757 | } | |
758 | break; | |
759 | default: | |
760 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
761 | goto error; | |
762 | } | |
763 | default: | |
764 | break; | |
765 | } | |
766 | ||
767 | if (!need_domain) { | |
768 | goto skip_domain; | |
769 | } | |
770 | ||
771 | /* | |
772 | * Check domain type for specific "pre-action". | |
773 | */ | |
774 | switch (cmd_ctx->lsm->domain.type) { | |
775 | case LTTNG_DOMAIN_KERNEL: | |
776 | if (!is_root) { | |
777 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; | |
778 | goto error; | |
779 | } | |
780 | ||
7d268848 MD |
781 | /* Kernel tracer check */ |
782 | if (!kernel_tracer_is_initialized()) { | |
783 | /* Basically, load kernel tracer modules */ | |
784 | ret = init_kernel_tracer(); | |
785 | if (ret != 0) { | |
786 | goto error; | |
787 | } | |
788 | } | |
789 | ||
917a718d JG |
790 | /* Consumer is in an ERROR state. Report back to client */ |
791 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
792 | ret = LTTNG_ERR_NO_KERNCONSUMERD; | |
793 | goto error; | |
794 | } | |
795 | ||
796 | /* Need a session for kernel command */ | |
797 | if (need_tracing_session) { | |
798 | if (cmd_ctx->session->kernel_session == NULL) { | |
799 | ret = create_kernel_session(cmd_ctx->session); | |
51630bd8 | 800 | if (ret != LTTNG_OK) { |
917a718d JG |
801 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
802 | goto error; | |
803 | } | |
804 | } | |
805 | ||
806 | /* Start the kernel consumer daemon */ | |
807 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
808 | if (kconsumer_data.pid == 0 && | |
809 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { | |
810 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
811 | ret = start_consumerd(&kconsumer_data); | |
812 | if (ret < 0) { | |
813 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; | |
814 | goto error; | |
815 | } | |
816 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); | |
817 | } else { | |
818 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
819 | } | |
820 | ||
821 | /* | |
822 | * The consumer was just spawned so we need to add the socket to | |
823 | * the consumer output of the session if exist. | |
824 | */ | |
825 | ret = consumer_create_socket(&kconsumer_data, | |
826 | cmd_ctx->session->kernel_session->consumer); | |
827 | if (ret < 0) { | |
828 | goto error; | |
829 | } | |
830 | } | |
831 | ||
832 | break; | |
833 | case LTTNG_DOMAIN_JUL: | |
834 | case LTTNG_DOMAIN_LOG4J: | |
835 | case LTTNG_DOMAIN_PYTHON: | |
836 | case LTTNG_DOMAIN_UST: | |
837 | { | |
838 | if (!ust_app_supported()) { | |
839 | ret = LTTNG_ERR_NO_UST; | |
840 | goto error; | |
841 | } | |
842 | /* Consumer is in an ERROR state. Report back to client */ | |
843 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
844 | ret = LTTNG_ERR_NO_USTCONSUMERD; | |
845 | goto error; | |
846 | } | |
847 | ||
848 | if (need_tracing_session) { | |
849 | /* Create UST session if none exist. */ | |
850 | if (cmd_ctx->session->ust_session == NULL) { | |
851 | ret = create_ust_session(cmd_ctx->session, | |
df4f5a87 | 852 | ALIGNED_CONST_PTR(cmd_ctx->lsm->domain)); |
917a718d JG |
853 | if (ret != LTTNG_OK) { |
854 | goto error; | |
855 | } | |
856 | } | |
857 | ||
858 | /* Start the UST consumer daemons */ | |
859 | /* 64-bit */ | |
860 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
861 | if (config.consumerd64_bin_path.value && | |
862 | ustconsumer64_data.pid == 0 && | |
863 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { | |
864 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); | |
865 | ret = start_consumerd(&ustconsumer64_data); | |
866 | if (ret < 0) { | |
867 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; | |
868 | uatomic_set(&ust_consumerd64_fd, -EINVAL); | |
869 | goto error; | |
870 | } | |
871 | ||
872 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); | |
873 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); | |
874 | } else { | |
875 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); | |
876 | } | |
877 | ||
878 | /* | |
879 | * Setup socket for consumer 64 bit. No need for atomic access | |
880 | * since it was set above and can ONLY be set in this thread. | |
881 | */ | |
882 | ret = consumer_create_socket(&ustconsumer64_data, | |
883 | cmd_ctx->session->ust_session->consumer); | |
884 | if (ret < 0) { | |
885 | goto error; | |
886 | } | |
887 | ||
888 | /* 32-bit */ | |
889 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); | |
890 | if (config.consumerd32_bin_path.value && | |
891 | ustconsumer32_data.pid == 0 && | |
892 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { | |
893 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
894 | ret = start_consumerd(&ustconsumer32_data); | |
895 | if (ret < 0) { | |
896 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; | |
897 | uatomic_set(&ust_consumerd32_fd, -EINVAL); | |
898 | goto error; | |
899 | } | |
900 | ||
901 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); | |
902 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); | |
903 | } else { | |
904 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
905 | } | |
906 | ||
907 | /* | |
908 | * Setup socket for consumer 32 bit. No need for atomic access | |
909 | * since it was set above and can ONLY be set in this thread. | |
910 | */ | |
911 | ret = consumer_create_socket(&ustconsumer32_data, | |
912 | cmd_ctx->session->ust_session->consumer); | |
913 | if (ret < 0) { | |
914 | goto error; | |
915 | } | |
916 | } | |
917 | break; | |
918 | } | |
919 | default: | |
920 | break; | |
921 | } | |
922 | skip_domain: | |
923 | ||
924 | /* Validate consumer daemon state when start/stop trace command */ | |
925 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
926 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
927 | switch (cmd_ctx->lsm->domain.type) { | |
928 | case LTTNG_DOMAIN_NONE: | |
929 | break; | |
930 | case LTTNG_DOMAIN_JUL: | |
931 | case LTTNG_DOMAIN_LOG4J: | |
932 | case LTTNG_DOMAIN_PYTHON: | |
933 | case LTTNG_DOMAIN_UST: | |
934 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
935 | ret = LTTNG_ERR_NO_USTCONSUMERD; | |
936 | goto error; | |
937 | } | |
938 | break; | |
939 | case LTTNG_DOMAIN_KERNEL: | |
940 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
941 | ret = LTTNG_ERR_NO_KERNCONSUMERD; | |
942 | goto error; | |
943 | } | |
944 | break; | |
945 | default: | |
946 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
947 | goto error; | |
948 | } | |
949 | } | |
950 | ||
951 | /* | |
952 | * Check that the UID or GID match that of the tracing session. | |
953 | * The root user can interact with all sessions. | |
954 | */ | |
955 | if (need_tracing_session) { | |
956 | if (!session_access_ok(cmd_ctx->session, | |
957 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
958 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)) || | |
959 | cmd_ctx->session->destroyed) { | |
960 | ret = LTTNG_ERR_EPERM; | |
961 | goto error; | |
962 | } | |
963 | } | |
964 | ||
965 | /* | |
966 | * Send relayd information to consumer as soon as we have a domain and a | |
967 | * session defined. | |
968 | */ | |
969 | if (cmd_ctx->session && need_domain) { | |
970 | /* | |
971 | * Setup relayd if not done yet. If the relayd information was already | |
972 | * sent to the consumer, this call will gracefully return. | |
973 | */ | |
974 | ret = cmd_setup_relayd(cmd_ctx->session); | |
975 | if (ret != LTTNG_OK) { | |
976 | goto error; | |
977 | } | |
978 | } | |
979 | ||
980 | /* Process by command type */ | |
981 | switch (cmd_ctx->lsm->cmd_type) { | |
982 | case LTTNG_ADD_CONTEXT: | |
983 | { | |
984 | /* | |
985 | * An LTTNG_ADD_CONTEXT command might have a supplementary | |
986 | * payload if the context being added is an application context. | |
987 | */ | |
988 | if (cmd_ctx->lsm->u.context.ctx.ctx == | |
989 | LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
990 | char *provider_name = NULL, *context_name = NULL; | |
991 | size_t provider_name_len = | |
992 | cmd_ctx->lsm->u.context.provider_name_len; | |
993 | size_t context_name_len = | |
994 | cmd_ctx->lsm->u.context.context_name_len; | |
995 | ||
996 | if (provider_name_len == 0 || context_name_len == 0) { | |
997 | /* | |
998 | * Application provider and context names MUST | |
999 | * be provided. | |
1000 | */ | |
1001 | ret = -LTTNG_ERR_INVALID; | |
1002 | goto error; | |
1003 | } | |
1004 | ||
1005 | provider_name = zmalloc(provider_name_len + 1); | |
1006 | if (!provider_name) { | |
1007 | ret = -LTTNG_ERR_NOMEM; | |
1008 | goto error; | |
1009 | } | |
1010 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = | |
1011 | provider_name; | |
1012 | ||
1013 | context_name = zmalloc(context_name_len + 1); | |
1014 | if (!context_name) { | |
1015 | ret = -LTTNG_ERR_NOMEM; | |
1016 | goto error_add_context; | |
1017 | } | |
1018 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = | |
1019 | context_name; | |
1020 | ||
3e3665b8 | 1021 | ret = lttcomm_recv_unix_sock(*sock, provider_name, |
917a718d JG |
1022 | provider_name_len); |
1023 | if (ret < 0) { | |
1024 | goto error_add_context; | |
1025 | } | |
1026 | ||
3e3665b8 | 1027 | ret = lttcomm_recv_unix_sock(*sock, context_name, |
917a718d JG |
1028 | context_name_len); |
1029 | if (ret < 0) { | |
1030 | goto error_add_context; | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | /* | |
1035 | * cmd_add_context assumes ownership of the provider and context | |
1036 | * names. | |
1037 | */ | |
1038 | ret = cmd_add_context(cmd_ctx->session, | |
1039 | cmd_ctx->lsm->domain.type, | |
1040 | cmd_ctx->lsm->u.context.channel_name, | |
df4f5a87 | 1041 | ALIGNED_CONST_PTR(cmd_ctx->lsm->u.context.ctx), |
917a718d JG |
1042 | kernel_poll_pipe[1]); |
1043 | ||
1044 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = NULL; | |
1045 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = NULL; | |
1046 | error_add_context: | |
1047 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name); | |
1048 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name); | |
1049 | if (ret < 0) { | |
1050 | goto error; | |
1051 | } | |
1052 | break; | |
1053 | } | |
1054 | case LTTNG_DISABLE_CHANNEL: | |
1055 | { | |
1056 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
1057 | cmd_ctx->lsm->u.disable.channel_name); | |
1058 | break; | |
1059 | } | |
1060 | case LTTNG_DISABLE_EVENT: | |
1061 | { | |
166fc586 | 1062 | ret = cmd_disable_event(cmd_ctx, *sock); |
917a718d JG |
1063 | break; |
1064 | } | |
1065 | case LTTNG_ENABLE_CHANNEL: | |
1066 | { | |
33b9609d | 1067 | ret = cmd_enable_channel(cmd_ctx, *sock, kernel_poll_pipe[1]); |
917a718d JG |
1068 | break; |
1069 | } | |
f953b297 JG |
1070 | case LTTNG_PROCESS_ATTR_TRACKER_ADD_INCLUDE_VALUE: |
1071 | case LTTNG_PROCESS_ATTR_TRACKER_REMOVE_INCLUDE_VALUE: | |
917a718d | 1072 | { |
f953b297 JG |
1073 | struct lttng_dynamic_buffer payload; |
1074 | struct lttng_buffer_view payload_view; | |
1075 | const bool add_value = | |
1076 | cmd_ctx->lsm->cmd_type == | |
1077 | LTTNG_PROCESS_ATTR_TRACKER_ADD_INCLUDE_VALUE; | |
1078 | const size_t name_len = | |
1079 | cmd_ctx->lsm->u.process_attr_tracker_add_remove_include_value | |
1080 | .name_len; | |
1081 | const enum lttng_domain_type domain_type = | |
1082 | (enum lttng_domain_type) | |
1083 | cmd_ctx->lsm->domain.type; | |
1084 | const enum lttng_process_attr process_attr = | |
1085 | (enum lttng_process_attr) cmd_ctx->lsm->u | |
1086 | .process_attr_tracker_add_remove_include_value | |
1087 | .process_attr; | |
1088 | const enum lttng_process_attr_value_type value_type = | |
1089 | (enum lttng_process_attr_value_type) cmd_ctx | |
1090 | ->lsm->u | |
1091 | .process_attr_tracker_add_remove_include_value | |
1092 | .value_type; | |
1093 | struct process_attr_value *value; | |
1094 | enum lttng_error_code ret_code; | |
1095 | ||
1096 | /* Receive remaining variable length payload if applicable. */ | |
1097 | if (name_len > LOGIN_NAME_MAX) { | |
1098 | /* | |
1099 | * POSIX mandates user and group names that are at least | |
1100 | * 8 characters long. Note that although shadow-utils | |
1101 | * (useradd, groupaadd, etc.) use 32 chars as their | |
1102 | * limit (from bits/utmp.h, UT_NAMESIZE), | |
1103 | * LOGIN_NAME_MAX is defined to 256. | |
1104 | */ | |
1105 | ERR("Rejecting process attribute tracker value %s as the provided exceeds the maximal allowed length: argument length = %zu, maximal length = %d", | |
1106 | add_value ? "addition" : "removal", | |
1107 | name_len, LOGIN_NAME_MAX); | |
1108 | ret = LTTNG_ERR_INVALID; | |
2d97a006 JR |
1109 | goto error; |
1110 | } | |
1111 | ||
f953b297 JG |
1112 | lttng_dynamic_buffer_init(&payload); |
1113 | if (name_len != 0) { | |
1114 | /* | |
1115 | * Receive variable payload for user/group name | |
1116 | * arguments. | |
1117 | */ | |
1118 | ret = lttng_dynamic_buffer_set_size(&payload, name_len); | |
1119 | if (ret) { | |
1120 | ERR("Failed to allocate buffer to receive payload of %s process attribute tracker value argument", | |
1121 | add_value ? "add" : "remove"); | |
55c9e7ca | 1122 | ret = LTTNG_ERR_NOMEM; |
f953b297 | 1123 | goto error_add_remove_tracker_value; |
55c9e7ca | 1124 | } |
f953b297 JG |
1125 | |
1126 | ret = lttcomm_recv_unix_sock( | |
1127 | *sock, payload.data, name_len); | |
55c9e7ca | 1128 | if (ret <= 0) { |
f953b297 JG |
1129 | ERR("Failed to receive payload of %s process attribute tracker value argument", |
1130 | add_value ? "add" : "remove"); | |
55c9e7ca | 1131 | *sock_error = 1; |
f953b297 JG |
1132 | ret = LTTNG_ERR_INVALID_PROTOCOL; |
1133 | goto error_add_remove_tracker_value; | |
55c9e7ca | 1134 | } |
f953b297 | 1135 | } |
2d97a006 | 1136 | |
f953b297 JG |
1137 | payload_view = lttng_buffer_view_from_dynamic_buffer( |
1138 | &payload, 0, name_len); | |
1139 | /* | |
1140 | * Validate the value type and domains are legal for the process | |
1141 | * attribute tracker that is specified and convert the value to | |
1142 | * add/remove to the internal sessiond representation. | |
1143 | */ | |
1144 | ret_code = process_attr_value_from_comm(domain_type, | |
1145 | process_attr, value_type, | |
1146 | &cmd_ctx->lsm->u.process_attr_tracker_add_remove_include_value | |
1147 | .integral_value, | |
1148 | &payload_view, &value); | |
1149 | if (ret_code != LTTNG_OK) { | |
1150 | ret = ret_code; | |
1151 | goto error_add_remove_tracker_value; | |
55c9e7ca | 1152 | } |
f953b297 JG |
1153 | |
1154 | if (add_value) { | |
1155 | ret = cmd_process_attr_tracker_inclusion_set_add_value( | |
1156 | cmd_ctx->session, domain_type, | |
1157 | process_attr, value); | |
1158 | } else { | |
1159 | ret = cmd_process_attr_tracker_inclusion_set_remove_value( | |
1160 | cmd_ctx->session, domain_type, | |
1161 | process_attr, value); | |
1162 | } | |
1163 | process_attr_value_destroy(value); | |
1164 | error_add_remove_tracker_value: | |
1165 | lttng_dynamic_buffer_reset(&payload); | |
1166 | break; | |
1167 | } | |
1168 | case LTTNG_PROCESS_ATTR_TRACKER_GET_POLICY: | |
1169 | { | |
1170 | enum lttng_tracking_policy tracking_policy; | |
1171 | const enum lttng_domain_type domain_type = | |
1172 | (enum lttng_domain_type) | |
1173 | cmd_ctx->lsm->domain.type; | |
1174 | const enum lttng_process_attr process_attr = | |
1175 | (enum lttng_process_attr) cmd_ctx->lsm->u | |
1176 | .process_attr_tracker_get_tracking_policy | |
1177 | .process_attr; | |
1178 | ||
1179 | ret = cmd_process_attr_tracker_get_tracking_policy( | |
1180 | cmd_ctx->session, domain_type, process_attr, | |
1181 | &tracking_policy); | |
1182 | if (ret != LTTNG_OK) { | |
55c9e7ca JR |
1183 | goto error; |
1184 | } | |
2d97a006 | 1185 | |
f953b297 JG |
1186 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, |
1187 | &(uint32_t){tracking_policy}, sizeof(uint32_t)); | |
1188 | if (ret < 0) { | |
1189 | ret = LTTNG_ERR_NOMEM; | |
2d97a006 JR |
1190 | goto error; |
1191 | } | |
f953b297 | 1192 | ret = LTTNG_OK; |
917a718d JG |
1193 | break; |
1194 | } | |
f953b297 | 1195 | case LTTNG_PROCESS_ATTR_TRACKER_SET_POLICY: |
917a718d | 1196 | { |
f953b297 JG |
1197 | const enum lttng_tracking_policy tracking_policy = |
1198 | (enum lttng_tracking_policy) cmd_ctx->lsm->u | |
1199 | .process_attr_tracker_set_tracking_policy | |
1200 | .tracking_policy; | |
1201 | const enum lttng_domain_type domain_type = | |
1202 | (enum lttng_domain_type) | |
1203 | cmd_ctx->lsm->domain.type; | |
1204 | const enum lttng_process_attr process_attr = | |
1205 | (enum lttng_process_attr) cmd_ctx->lsm->u | |
1206 | .process_attr_tracker_set_tracking_policy | |
1207 | .process_attr; | |
1208 | ||
1209 | ret = cmd_process_attr_tracker_set_tracking_policy( | |
1210 | cmd_ctx->session, domain_type, process_attr, | |
1211 | tracking_policy); | |
1212 | if (ret != LTTNG_OK) { | |
1213 | goto error; | |
55c9e7ca | 1214 | } |
f953b297 JG |
1215 | break; |
1216 | } | |
1217 | case LTTNG_PROCESS_ATTR_TRACKER_GET_INCLUSION_SET: | |
1218 | { | |
1219 | struct lttng_process_attr_values *values; | |
1220 | struct lttng_dynamic_buffer reply; | |
1221 | const enum lttng_domain_type domain_type = | |
1222 | (enum lttng_domain_type) | |
1223 | cmd_ctx->lsm->domain.type; | |
1224 | const enum lttng_process_attr process_attr = | |
1225 | (enum lttng_process_attr) cmd_ctx->lsm->u | |
1226 | .process_attr_tracker_get_inclusion_set | |
1227 | .process_attr; | |
1228 | ||
1229 | ret = cmd_process_attr_tracker_get_inclusion_set( | |
1230 | cmd_ctx->session, domain_type, process_attr, | |
1231 | &values); | |
1232 | if (ret != LTTNG_OK) { | |
55c9e7ca JR |
1233 | goto error; |
1234 | } | |
2d97a006 | 1235 | |
f953b297 JG |
1236 | lttng_dynamic_buffer_init(&reply); |
1237 | ret = lttng_process_attr_values_serialize(values, &reply); | |
1238 | if (ret < 0) { | |
1239 | goto error_tracker_get_inclusion_set; | |
2d97a006 JR |
1240 | } |
1241 | ||
f953b297 JG |
1242 | ret = setup_lttng_msg_no_cmd_header( |
1243 | cmd_ctx, reply.data, reply.size); | |
1244 | if (ret < 0) { | |
1245 | ret = LTTNG_ERR_NOMEM; | |
1246 | goto error_tracker_get_inclusion_set; | |
1247 | } | |
1248 | ret = LTTNG_OK; | |
1249 | ||
1250 | error_tracker_get_inclusion_set: | |
1251 | lttng_process_attr_values_destroy(values); | |
1252 | lttng_dynamic_buffer_reset(&reply); | |
917a718d JG |
1253 | break; |
1254 | } | |
1255 | case LTTNG_ENABLE_EVENT: | |
1256 | { | |
166fc586 | 1257 | ret = cmd_enable_event(cmd_ctx, *sock, kernel_poll_pipe[1]); |
917a718d JG |
1258 | break; |
1259 | } | |
1260 | case LTTNG_LIST_TRACEPOINTS: | |
1261 | { | |
166fc586 JR |
1262 | enum lttng_error_code ret_code; |
1263 | unsigned int nb_events; | |
1264 | struct lttcomm_list_command_header cmd_header = { 0 }; | |
917a718d JG |
1265 | |
1266 | session_lock_list(); | |
166fc586 JR |
1267 | ret_code = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, |
1268 | &payload, &nb_events); | |
917a718d | 1269 | session_unlock_list(); |
166fc586 JR |
1270 | if (ret_code != LTTNG_OK) { |
1271 | ret = (int) ret_code; | |
917a718d JG |
1272 | goto error; |
1273 | } | |
1274 | ||
166fc586 JR |
1275 | if (nb_events > UINT32_MAX) { |
1276 | ret = LTTNG_ERR_OVERFLOW; | |
1277 | goto error; | |
1278 | } | |
1279 | ||
1280 | cmd_header.count = (uint32_t) nb_events; | |
1281 | ret = setup_lttng_msg(cmd_ctx, payload.data, payload.size, | |
1282 | &cmd_header, sizeof(cmd_header)); | |
917a718d JG |
1283 | |
1284 | if (ret < 0) { | |
1285 | goto setup_error; | |
1286 | } | |
1287 | ||
1288 | ret = LTTNG_OK; | |
1289 | break; | |
1290 | } | |
1291 | case LTTNG_LIST_TRACEPOINT_FIELDS: | |
1292 | { | |
1293 | struct lttng_event_field *fields; | |
1294 | ssize_t nb_fields; | |
1295 | ||
1296 | session_lock_list(); | |
1297 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, | |
1298 | &fields); | |
1299 | session_unlock_list(); | |
1300 | if (nb_fields < 0) { | |
1301 | /* Return value is a negative lttng_error_code. */ | |
1302 | ret = -nb_fields; | |
1303 | goto error; | |
1304 | } | |
1305 | ||
1306 | /* | |
1307 | * Setup lttng message with payload size set to the event list size in | |
1308 | * bytes and then copy list into the llm payload. | |
1309 | */ | |
1310 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, fields, | |
1311 | sizeof(struct lttng_event_field) * nb_fields); | |
1312 | free(fields); | |
1313 | ||
1314 | if (ret < 0) { | |
1315 | goto setup_error; | |
1316 | } | |
1317 | ||
1318 | ret = LTTNG_OK; | |
1319 | break; | |
1320 | } | |
1321 | case LTTNG_LIST_SYSCALLS: | |
1322 | { | |
166fc586 JR |
1323 | enum lttng_error_code ret_code; |
1324 | uint32_t nb_syscalls; | |
1325 | struct lttcomm_list_command_header cmd_header = { 0 }; | |
917a718d | 1326 | |
166fc586 JR |
1327 | ret_code = cmd_list_syscalls(&payload, &nb_syscalls); |
1328 | if (ret_code != LTTNG_OK) { | |
1329 | ret = (int) ret_code; | |
917a718d JG |
1330 | goto error; |
1331 | } | |
1332 | ||
166fc586 JR |
1333 | if (nb_syscalls > UINT32_MAX) { |
1334 | ret = LTTNG_ERR_OVERFLOW; | |
1335 | goto error; | |
1336 | } | |
1337 | ||
1338 | cmd_header.count = (uint32_t) nb_syscalls; | |
1339 | ret = setup_lttng_msg(cmd_ctx, payload.data, payload.size, | |
1340 | &cmd_header, sizeof(cmd_header)); | |
917a718d JG |
1341 | |
1342 | if (ret < 0) { | |
1343 | goto setup_error; | |
1344 | } | |
1345 | ||
1346 | ret = LTTNG_OK; | |
1347 | break; | |
1348 | } | |
917a718d JG |
1349 | case LTTNG_SET_CONSUMER_URI: |
1350 | { | |
1351 | size_t nb_uri, len; | |
1352 | struct lttng_uri *uris; | |
1353 | ||
1354 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
1355 | len = nb_uri * sizeof(struct lttng_uri); | |
1356 | ||
1357 | if (nb_uri == 0) { | |
1358 | ret = LTTNG_ERR_INVALID; | |
1359 | goto error; | |
1360 | } | |
1361 | ||
1362 | uris = zmalloc(len); | |
1363 | if (uris == NULL) { | |
1364 | ret = LTTNG_ERR_FATAL; | |
1365 | goto error; | |
1366 | } | |
1367 | ||
1368 | /* Receive variable len data */ | |
1369 | DBG("Receiving %zu URI(s) from client ...", nb_uri); | |
3e3665b8 | 1370 | ret = lttcomm_recv_unix_sock(*sock, uris, len); |
917a718d JG |
1371 | if (ret <= 0) { |
1372 | DBG("No URIs received from client... continuing"); | |
1373 | *sock_error = 1; | |
1374 | ret = LTTNG_ERR_SESSION_FAIL; | |
1375 | free(uris); | |
1376 | goto error; | |
1377 | } | |
1378 | ||
1379 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); | |
1380 | free(uris); | |
1381 | if (ret != LTTNG_OK) { | |
1382 | goto error; | |
1383 | } | |
1384 | ||
1385 | ||
1386 | break; | |
1387 | } | |
1388 | case LTTNG_START_TRACE: | |
1389 | { | |
1390 | /* | |
1391 | * On the first start, if we have a kernel session and we have | |
1392 | * enabled time or size-based rotations, we have to make sure | |
1393 | * the kernel tracer supports it. | |
1394 | */ | |
1395 | if (!cmd_ctx->session->has_been_started && \ | |
1396 | cmd_ctx->session->kernel_session && \ | |
1397 | (cmd_ctx->session->rotate_timer_period || \ | |
1398 | cmd_ctx->session->rotate_size) && \ | |
1399 | !check_rotate_compatible()) { | |
1400 | DBG("Kernel tracer version is not compatible with the rotation feature"); | |
1401 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
1402 | goto error; | |
1403 | } | |
1404 | ret = cmd_start_trace(cmd_ctx->session); | |
1405 | break; | |
1406 | } | |
1407 | case LTTNG_STOP_TRACE: | |
1408 | { | |
1409 | ret = cmd_stop_trace(cmd_ctx->session); | |
1410 | break; | |
1411 | } | |
917a718d JG |
1412 | case LTTNG_DESTROY_SESSION: |
1413 | { | |
1414 | ret = cmd_destroy_session(cmd_ctx->session, | |
3e3665b8 JG |
1415 | notification_thread_handle, |
1416 | sock); | |
917a718d JG |
1417 | break; |
1418 | } | |
1419 | case LTTNG_LIST_DOMAINS: | |
1420 | { | |
1421 | ssize_t nb_dom; | |
1422 | struct lttng_domain *domains = NULL; | |
1423 | ||
1424 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); | |
1425 | if (nb_dom < 0) { | |
1426 | /* Return value is a negative lttng_error_code. */ | |
1427 | ret = -nb_dom; | |
1428 | goto error; | |
1429 | } | |
1430 | ||
1431 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, domains, | |
1432 | nb_dom * sizeof(struct lttng_domain)); | |
1433 | free(domains); | |
1434 | ||
1435 | if (ret < 0) { | |
1436 | goto setup_error; | |
1437 | } | |
1438 | ||
1439 | ret = LTTNG_OK; | |
1440 | break; | |
1441 | } | |
1442 | case LTTNG_LIST_CHANNELS: | |
1443 | { | |
33b9609d JR |
1444 | uint32_t nb_channel; |
1445 | enum lttng_error_code ret_code; | |
1446 | struct lttcomm_list_command_header cmd_header = { 0 }; | |
917a718d | 1447 | |
33b9609d JR |
1448 | ret_code = cmd_list_channels(cmd_ctx->lsm->domain.type, |
1449 | cmd_ctx->session, &payload, &nb_channel); | |
1450 | if (ret_code != LTTNG_OK) { | |
1451 | ret = (int) ret_code; | |
917a718d JG |
1452 | goto error; |
1453 | } | |
1454 | ||
33b9609d JR |
1455 | cmd_header.count = nb_channel; |
1456 | ret = setup_lttng_msg(cmd_ctx, payload.data, payload.size, | |
1457 | &cmd_header, sizeof(cmd_header)); | |
917a718d JG |
1458 | |
1459 | if (ret < 0) { | |
1460 | goto setup_error; | |
1461 | } | |
1462 | ||
1463 | ret = LTTNG_OK; | |
1464 | break; | |
1465 | } | |
1466 | case LTTNG_LIST_EVENTS: | |
1467 | { | |
166fc586 JR |
1468 | enum lttng_error_code ret_code; |
1469 | unsigned int nb_events; | |
1470 | struct lttcomm_list_command_header cmd_header = { 0 }; | |
1471 | ||
1472 | ret_code = cmd_list_events(cmd_ctx->lsm->domain.type, | |
1473 | cmd_ctx->session, | |
1474 | cmd_ctx->lsm->u.list.channel_name, &payload, | |
1475 | &nb_events); | |
1476 | ||
1477 | if (ret_code != LTTNG_OK) { | |
1478 | ret = (int) ret_code; | |
917a718d JG |
1479 | goto error; |
1480 | } | |
1481 | ||
166fc586 JR |
1482 | if (nb_events > UINT32_MAX) { |
1483 | ret = LTTNG_ERR_OVERFLOW; | |
1484 | goto error; | |
1485 | } | |
1486 | ||
1487 | cmd_header.count = (uint32_t) nb_events; | |
1488 | ret = setup_lttng_msg(cmd_ctx, payload.data, payload.size, | |
1489 | &cmd_header, sizeof(cmd_header)); | |
917a718d JG |
1490 | |
1491 | if (ret < 0) { | |
1492 | goto setup_error; | |
1493 | } | |
1494 | ||
1495 | ret = LTTNG_OK; | |
1496 | break; | |
1497 | } | |
1498 | case LTTNG_LIST_SESSIONS: | |
1499 | { | |
1500 | unsigned int nr_sessions; | |
1501 | void *sessions_payload; | |
1502 | size_t payload_len; | |
1503 | ||
1504 | session_lock_list(); | |
1505 | nr_sessions = lttng_sessions_count( | |
1506 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
1507 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
b178f53e JG |
1508 | |
1509 | payload_len = (sizeof(struct lttng_session) * nr_sessions) + | |
1510 | (sizeof(struct lttng_session_extended) * nr_sessions); | |
917a718d JG |
1511 | sessions_payload = zmalloc(payload_len); |
1512 | ||
1513 | if (!sessions_payload) { | |
1514 | session_unlock_list(); | |
1515 | ret = -ENOMEM; | |
1516 | goto setup_error; | |
1517 | } | |
1518 | ||
b178f53e | 1519 | cmd_list_lttng_sessions(sessions_payload, nr_sessions, |
917a718d JG |
1520 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
1521 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
1522 | session_unlock_list(); | |
1523 | ||
1524 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, sessions_payload, | |
1525 | payload_len); | |
1526 | free(sessions_payload); | |
1527 | ||
1528 | if (ret < 0) { | |
1529 | goto setup_error; | |
1530 | } | |
1531 | ||
1532 | ret = LTTNG_OK; | |
1533 | break; | |
1534 | } | |
1535 | case LTTNG_REGISTER_CONSUMER: | |
1536 | { | |
1537 | struct consumer_data *cdata; | |
1538 | ||
1539 | switch (cmd_ctx->lsm->domain.type) { | |
1540 | case LTTNG_DOMAIN_KERNEL: | |
1541 | cdata = &kconsumer_data; | |
1542 | break; | |
1543 | default: | |
1544 | ret = LTTNG_ERR_UND; | |
1545 | goto error; | |
1546 | } | |
1547 | ||
1548 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
1549 | cmd_ctx->lsm->u.reg.path, cdata); | |
1550 | break; | |
1551 | } | |
1552 | case LTTNG_DATA_PENDING: | |
1553 | { | |
1554 | int pending_ret; | |
1555 | uint8_t pending_ret_byte; | |
1556 | ||
1557 | pending_ret = cmd_data_pending(cmd_ctx->session); | |
1558 | ||
1559 | /* | |
1560 | * FIXME | |
1561 | * | |
1562 | * This function may returns 0 or 1 to indicate whether or not | |
1563 | * there is data pending. In case of error, it should return an | |
1564 | * LTTNG_ERR code. However, some code paths may still return | |
1565 | * a nondescript error code, which we handle by returning an | |
1566 | * "unknown" error. | |
1567 | */ | |
1568 | if (pending_ret == 0 || pending_ret == 1) { | |
1569 | /* | |
1570 | * ret will be set to LTTNG_OK at the end of | |
1571 | * this function. | |
1572 | */ | |
1573 | } else if (pending_ret < 0) { | |
1574 | ret = LTTNG_ERR_UNK; | |
1575 | goto setup_error; | |
1576 | } else { | |
1577 | ret = pending_ret; | |
1578 | goto setup_error; | |
1579 | } | |
1580 | ||
1581 | pending_ret_byte = (uint8_t) pending_ret; | |
1582 | ||
1583 | /* 1 byte to return whether or not data is pending */ | |
1584 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, | |
1585 | &pending_ret_byte, 1); | |
1586 | ||
1587 | if (ret < 0) { | |
1588 | goto setup_error; | |
1589 | } | |
1590 | ||
1591 | ret = LTTNG_OK; | |
1592 | break; | |
1593 | } | |
1594 | case LTTNG_SNAPSHOT_ADD_OUTPUT: | |
1595 | { | |
a914e76a | 1596 | uint32_t snapshot_id; |
917a718d JG |
1597 | struct lttcomm_lttng_output_id reply; |
1598 | ||
1599 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
df4f5a87 JG |
1600 | ALIGNED_CONST_PTR(cmd_ctx->lsm->u.snapshot_output.output), |
1601 | &snapshot_id); | |
917a718d JG |
1602 | if (ret != LTTNG_OK) { |
1603 | goto error; | |
1604 | } | |
a914e76a | 1605 | reply.id = snapshot_id; |
917a718d JG |
1606 | |
1607 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &reply, | |
1608 | sizeof(reply)); | |
1609 | if (ret < 0) { | |
1610 | goto setup_error; | |
1611 | } | |
1612 | ||
1613 | /* Copy output list into message payload */ | |
1614 | ret = LTTNG_OK; | |
1615 | break; | |
1616 | } | |
1617 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
1618 | { | |
1619 | ret = cmd_snapshot_del_output(cmd_ctx->session, | |
df4f5a87 | 1620 | ALIGNED_CONST_PTR(cmd_ctx->lsm->u.snapshot_output.output)); |
917a718d JG |
1621 | break; |
1622 | } | |
1623 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
1624 | { | |
1625 | ssize_t nb_output; | |
1626 | struct lttng_snapshot_output *outputs = NULL; | |
1627 | ||
1628 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
1629 | if (nb_output < 0) { | |
1630 | ret = -nb_output; | |
1631 | goto error; | |
1632 | } | |
1633 | ||
1634 | assert((nb_output > 0 && outputs) || nb_output == 0); | |
1635 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, outputs, | |
1636 | nb_output * sizeof(struct lttng_snapshot_output)); | |
1637 | free(outputs); | |
1638 | ||
1639 | if (ret < 0) { | |
1640 | goto setup_error; | |
1641 | } | |
1642 | ||
1643 | ret = LTTNG_OK; | |
1644 | break; | |
1645 | } | |
1646 | case LTTNG_SNAPSHOT_RECORD: | |
1647 | { | |
1648 | ret = cmd_snapshot_record(cmd_ctx->session, | |
df4f5a87 | 1649 | ALIGNED_CONST_PTR(cmd_ctx->lsm->u.snapshot_record.output), |
917a718d JG |
1650 | cmd_ctx->lsm->u.snapshot_record.wait); |
1651 | break; | |
1652 | } | |
b178f53e | 1653 | case LTTNG_CREATE_SESSION_EXT: |
917a718d | 1654 | { |
b178f53e JG |
1655 | struct lttng_dynamic_buffer payload; |
1656 | struct lttng_session_descriptor *return_descriptor = NULL; | |
917a718d | 1657 | |
b178f53e | 1658 | lttng_dynamic_buffer_init(&payload); |
3e3665b8 | 1659 | ret = cmd_create_session(cmd_ctx, *sock, &return_descriptor); |
b178f53e JG |
1660 | if (ret != LTTNG_OK) { |
1661 | goto error; | |
917a718d JG |
1662 | } |
1663 | ||
b178f53e JG |
1664 | ret = lttng_session_descriptor_serialize(return_descriptor, |
1665 | &payload); | |
1666 | if (ret) { | |
1667 | ERR("Failed to serialize session descriptor in reply to \"create session\" command"); | |
1668 | lttng_session_descriptor_destroy(return_descriptor); | |
1669 | ret = LTTNG_ERR_NOMEM; | |
1670 | goto error; | |
917a718d | 1671 | } |
b178f53e JG |
1672 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, payload.data, |
1673 | payload.size); | |
1674 | if (ret) { | |
1675 | lttng_session_descriptor_destroy(return_descriptor); | |
1676 | ret = LTTNG_ERR_NOMEM; | |
1677 | goto error; | |
1678 | } | |
1679 | lttng_dynamic_buffer_reset(&payload); | |
1680 | lttng_session_descriptor_destroy(return_descriptor); | |
1681 | ret = LTTNG_OK; | |
917a718d JG |
1682 | break; |
1683 | } | |
1684 | case LTTNG_SAVE_SESSION: | |
1685 | { | |
1686 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
1687 | &cmd_ctx->creds); | |
1688 | break; | |
1689 | } | |
1690 | case LTTNG_SET_SESSION_SHM_PATH: | |
1691 | { | |
1692 | ret = cmd_set_session_shm_path(cmd_ctx->session, | |
1693 | cmd_ctx->lsm->u.set_shm_path.shm_path); | |
1694 | break; | |
1695 | } | |
1696 | case LTTNG_REGENERATE_METADATA: | |
1697 | { | |
1698 | ret = cmd_regenerate_metadata(cmd_ctx->session); | |
1699 | break; | |
1700 | } | |
1701 | case LTTNG_REGENERATE_STATEDUMP: | |
1702 | { | |
1703 | ret = cmd_regenerate_statedump(cmd_ctx->session); | |
1704 | break; | |
1705 | } | |
1706 | case LTTNG_REGISTER_TRIGGER: | |
1707 | { | |
3e3665b8 | 1708 | ret = cmd_register_trigger(cmd_ctx, *sock, |
917a718d JG |
1709 | notification_thread_handle); |
1710 | break; | |
1711 | } | |
1712 | case LTTNG_UNREGISTER_TRIGGER: | |
1713 | { | |
3e3665b8 | 1714 | ret = cmd_unregister_trigger(cmd_ctx, *sock, |
917a718d JG |
1715 | notification_thread_handle); |
1716 | break; | |
1717 | } | |
1718 | case LTTNG_ROTATE_SESSION: | |
1719 | { | |
1720 | struct lttng_rotate_session_return rotate_return; | |
1721 | ||
1722 | DBG("Client rotate session \"%s\"", cmd_ctx->session->name); | |
1723 | ||
1724 | memset(&rotate_return, 0, sizeof(rotate_return)); | |
1725 | if (cmd_ctx->session->kernel_session && !check_rotate_compatible()) { | |
1726 | DBG("Kernel tracer version is not compatible with the rotation feature"); | |
1727 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
1728 | goto error; | |
1729 | } | |
1730 | ||
7fdbed1c | 1731 | ret = cmd_rotate_session(cmd_ctx->session, &rotate_return, |
343defc2 MD |
1732 | false, |
1733 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED); | |
917a718d JG |
1734 | if (ret < 0) { |
1735 | ret = -ret; | |
1736 | goto error; | |
1737 | } | |
1738 | ||
1739 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &rotate_return, | |
1740 | sizeof(rotate_return)); | |
1741 | if (ret < 0) { | |
1742 | ret = -ret; | |
1743 | goto error; | |
1744 | } | |
1745 | ||
1746 | ret = LTTNG_OK; | |
1747 | break; | |
1748 | } | |
1749 | case LTTNG_ROTATION_GET_INFO: | |
1750 | { | |
1751 | struct lttng_rotation_get_info_return get_info_return; | |
1752 | ||
1753 | memset(&get_info_return, 0, sizeof(get_info_return)); | |
1754 | ret = cmd_rotate_get_info(cmd_ctx->session, &get_info_return, | |
1755 | cmd_ctx->lsm->u.get_rotation_info.rotation_id); | |
1756 | if (ret < 0) { | |
1757 | ret = -ret; | |
1758 | goto error; | |
1759 | } | |
1760 | ||
1761 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &get_info_return, | |
1762 | sizeof(get_info_return)); | |
1763 | if (ret < 0) { | |
1764 | ret = -ret; | |
1765 | goto error; | |
1766 | } | |
1767 | ||
1768 | ret = LTTNG_OK; | |
1769 | break; | |
1770 | } | |
1771 | case LTTNG_ROTATION_SET_SCHEDULE: | |
1772 | { | |
1773 | bool set_schedule; | |
1774 | enum lttng_rotation_schedule_type schedule_type; | |
1775 | uint64_t value; | |
1776 | ||
1777 | if (cmd_ctx->session->kernel_session && !check_rotate_compatible()) { | |
1778 | DBG("Kernel tracer version does not support session rotations"); | |
1779 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
1780 | goto error; | |
1781 | } | |
1782 | ||
1783 | set_schedule = cmd_ctx->lsm->u.rotation_set_schedule.set == 1; | |
1784 | schedule_type = (enum lttng_rotation_schedule_type) cmd_ctx->lsm->u.rotation_set_schedule.type; | |
1785 | value = cmd_ctx->lsm->u.rotation_set_schedule.value; | |
1786 | ||
1787 | ret = cmd_rotation_set_schedule(cmd_ctx->session, | |
1788 | set_schedule, | |
1789 | schedule_type, | |
1790 | value, | |
1791 | notification_thread_handle); | |
1792 | if (ret != LTTNG_OK) { | |
1793 | goto error; | |
1794 | } | |
1795 | ||
1796 | break; | |
1797 | } | |
1798 | case LTTNG_SESSION_LIST_ROTATION_SCHEDULES: | |
1799 | { | |
1800 | struct lttng_session_list_schedules_return schedules = { | |
1801 | .periodic.set = !!cmd_ctx->session->rotate_timer_period, | |
1802 | .periodic.value = cmd_ctx->session->rotate_timer_period, | |
1803 | .size.set = !!cmd_ctx->session->rotate_size, | |
1804 | .size.value = cmd_ctx->session->rotate_size, | |
1805 | }; | |
1806 | ||
1807 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &schedules, | |
1808 | sizeof(schedules)); | |
1809 | if (ret < 0) { | |
1810 | ret = -ret; | |
1811 | goto error; | |
1812 | } | |
1813 | ||
1814 | ret = LTTNG_OK; | |
1815 | break; | |
1816 | } | |
022349df MD |
1817 | case LTTNG_CLEAR_SESSION: |
1818 | { | |
1819 | ret = cmd_clear_session(cmd_ctx->session, sock); | |
1820 | break; | |
1821 | } | |
917a718d JG |
1822 | default: |
1823 | ret = LTTNG_ERR_UND; | |
1824 | break; | |
1825 | } | |
1826 | ||
1827 | error: | |
1828 | if (cmd_ctx->llm == NULL) { | |
1829 | DBG("Missing llm structure. Allocating one."); | |
1830 | if (setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0) < 0) { | |
1831 | goto setup_error; | |
1832 | } | |
1833 | } | |
1834 | /* Set return code */ | |
1835 | cmd_ctx->llm->ret_code = ret; | |
1836 | setup_error: | |
1837 | if (cmd_ctx->session) { | |
1838 | session_unlock(cmd_ctx->session); | |
1839 | session_put(cmd_ctx->session); | |
3e3665b8 | 1840 | cmd_ctx->session = NULL; |
917a718d JG |
1841 | } |
1842 | if (need_tracing_session) { | |
1843 | session_unlock_list(); | |
1844 | } | |
1845 | init_setup_error: | |
1846 | assert(!rcu_read_ongoing()); | |
33b9609d | 1847 | lttng_dynamic_buffer_reset(&payload); |
917a718d JG |
1848 | return ret; |
1849 | } | |
1850 | ||
1851 | static int create_client_sock(void) | |
1852 | { | |
1853 | int ret, client_sock; | |
1854 | const mode_t old_umask = umask(0); | |
1855 | ||
1856 | /* Create client tool unix socket */ | |
1857 | client_sock = lttcomm_create_unix_sock(config.client_unix_sock_path.value); | |
1858 | if (client_sock < 0) { | |
1859 | ERR("Create unix sock failed: %s", config.client_unix_sock_path.value); | |
1860 | ret = -1; | |
1861 | goto end; | |
1862 | } | |
1863 | ||
1864 | /* Set the cloexec flag */ | |
1865 | ret = utils_set_fd_cloexec(client_sock); | |
1866 | if (ret < 0) { | |
1867 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
1868 | "Continuing but note that the consumer daemon will have a " | |
1869 | "reference to this socket on exec()", client_sock); | |
1870 | } | |
1871 | ||
1872 | /* File permission MUST be 660 */ | |
1873 | ret = chmod(config.client_unix_sock_path.value, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
1874 | if (ret < 0) { | |
18972083 JR |
1875 | ERR("Set file permissions failed: %s", |
1876 | config.client_unix_sock_path.value); | |
917a718d | 1877 | PERROR("chmod"); |
18972083 JR |
1878 | (void) lttcomm_close_unix_sock(client_sock); |
1879 | ret = -1; | |
917a718d JG |
1880 | goto end; |
1881 | } | |
1882 | DBG("Created client socket (fd = %i)", client_sock); | |
1883 | ret = client_sock; | |
1884 | end: | |
1885 | umask(old_umask); | |
1886 | return ret; | |
1887 | } | |
1888 | ||
1889 | static void cleanup_client_thread(void *data) | |
1890 | { | |
1891 | struct lttng_pipe *quit_pipe = data; | |
1892 | ||
1893 | lttng_pipe_destroy(quit_pipe); | |
1894 | } | |
1895 | ||
6cb45e93 JG |
1896 | static void thread_init_cleanup(void *data) |
1897 | { | |
1898 | set_thread_status(false); | |
1899 | } | |
1900 | ||
917a718d JG |
1901 | /* |
1902 | * This thread manage all clients request using the unix client socket for | |
1903 | * communication. | |
1904 | */ | |
1905 | static void *thread_manage_clients(void *data) | |
1906 | { | |
1907 | int sock = -1, ret, i, pollfd, err = -1; | |
1908 | int sock_error; | |
1909 | uint32_t revents, nb_fd; | |
1910 | struct command_ctx *cmd_ctx = NULL; | |
1911 | struct lttng_poll_event events; | |
0f68efb6 | 1912 | const int client_sock = thread_state.client_sock; |
917a718d JG |
1913 | struct lttng_pipe *quit_pipe = data; |
1914 | const int thread_quit_pipe_fd = lttng_pipe_get_readfd(quit_pipe); | |
1915 | ||
1916 | DBG("[thread] Manage client started"); | |
1917 | ||
1918 | is_root = (getuid() == 0); | |
1919 | ||
6cb45e93 | 1920 | pthread_cleanup_push(thread_init_cleanup, NULL); |
917a718d JG |
1921 | |
1922 | rcu_register_thread(); | |
1923 | ||
1924 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); | |
1925 | ||
1926 | health_code_update(); | |
1927 | ||
1928 | ret = lttcomm_listen_unix_sock(client_sock); | |
1929 | if (ret < 0) { | |
1930 | goto error_listen; | |
1931 | } | |
1932 | ||
1933 | /* | |
1934 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
1935 | * more will be added to this poll set. | |
1936 | */ | |
1937 | ret = lttng_poll_create(&events, 2, LTTNG_CLOEXEC); | |
1938 | if (ret < 0) { | |
1939 | goto error_create_poll; | |
1940 | } | |
1941 | ||
1942 | /* Add the application registration socket */ | |
1943 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
1944 | if (ret < 0) { | |
1945 | goto error; | |
1946 | } | |
1947 | ||
1948 | /* Add thread quit pipe */ | |
1949 | ret = lttng_poll_add(&events, thread_quit_pipe_fd, LPOLLIN | LPOLLERR); | |
1950 | if (ret < 0) { | |
1951 | goto error; | |
1952 | } | |
1953 | ||
6cb45e93 JG |
1954 | /* Set state as running. */ |
1955 | set_thread_status(true); | |
1956 | pthread_cleanup_pop(0); | |
1957 | ||
917a718d JG |
1958 | /* This testpoint is after we signal readiness to the parent. */ |
1959 | if (testpoint(sessiond_thread_manage_clients)) { | |
1960 | goto error; | |
1961 | } | |
1962 | ||
1963 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { | |
1964 | goto error; | |
1965 | } | |
1966 | ||
1967 | health_code_update(); | |
1968 | ||
917a718d JG |
1969 | while (1) { |
1970 | const struct cmd_completion_handler *cmd_completion_handler; | |
1971 | ||
1972 | DBG("Accepting client command ..."); | |
1973 | ||
1974 | /* Inifinite blocking call, waiting for transmission */ | |
1975 | restart: | |
1976 | health_poll_entry(); | |
1977 | ret = lttng_poll_wait(&events, -1); | |
1978 | health_poll_exit(); | |
1979 | if (ret < 0) { | |
1980 | /* | |
1981 | * Restart interrupted system call. | |
1982 | */ | |
1983 | if (errno == EINTR) { | |
1984 | goto restart; | |
1985 | } | |
1986 | goto error; | |
1987 | } | |
1988 | ||
1989 | nb_fd = ret; | |
1990 | ||
1991 | for (i = 0; i < nb_fd; i++) { | |
1992 | revents = LTTNG_POLL_GETEV(&events, i); | |
1993 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1994 | ||
1995 | health_code_update(); | |
1996 | ||
917a718d JG |
1997 | if (pollfd == thread_quit_pipe_fd) { |
1998 | err = 0; | |
1999 | goto exit; | |
2000 | } else { | |
2001 | /* Event on the registration socket */ | |
2002 | if (revents & LPOLLIN) { | |
2003 | continue; | |
2004 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2005 | ERR("Client socket poll error"); | |
2006 | goto error; | |
2007 | } else { | |
2008 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2009 | goto error; | |
2010 | } | |
2011 | } | |
2012 | } | |
2013 | ||
2014 | DBG("Wait for client response"); | |
2015 | ||
2016 | health_code_update(); | |
2017 | ||
2018 | sock = lttcomm_accept_unix_sock(client_sock); | |
2019 | if (sock < 0) { | |
2020 | goto error; | |
2021 | } | |
2022 | ||
2023 | /* | |
2024 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
2025 | * show must go on. | |
2026 | */ | |
2027 | (void) utils_set_fd_cloexec(sock); | |
2028 | ||
2029 | /* Set socket option for credentials retrieval */ | |
2030 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
2031 | if (ret < 0) { | |
2032 | goto error; | |
2033 | } | |
2034 | ||
2035 | /* Allocate context command to process the client request */ | |
2036 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); | |
2037 | if (cmd_ctx == NULL) { | |
2038 | PERROR("zmalloc cmd_ctx"); | |
2039 | goto error; | |
2040 | } | |
2041 | ||
2042 | /* Allocate data buffer for reception */ | |
2043 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); | |
2044 | if (cmd_ctx->lsm == NULL) { | |
2045 | PERROR("zmalloc cmd_ctx->lsm"); | |
2046 | goto error; | |
2047 | } | |
2048 | ||
2049 | cmd_ctx->llm = NULL; | |
2050 | cmd_ctx->session = NULL; | |
2051 | ||
2052 | health_code_update(); | |
2053 | ||
2054 | /* | |
2055 | * Data is received from the lttng client. The struct | |
2056 | * lttcomm_session_msg (lsm) contains the command and data request of | |
2057 | * the client. | |
2058 | */ | |
2059 | DBG("Receiving data from client ..."); | |
2060 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, | |
2061 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
2062 | if (ret <= 0) { | |
2063 | DBG("Nothing recv() from client... continuing"); | |
2064 | ret = close(sock); | |
2065 | if (ret) { | |
2066 | PERROR("close"); | |
2067 | } | |
2068 | sock = -1; | |
2069 | clean_command_ctx(&cmd_ctx); | |
2070 | continue; | |
2071 | } | |
2072 | ||
2073 | health_code_update(); | |
2074 | ||
2075 | // TODO: Validate cmd_ctx including sanity check for | |
2076 | // security purpose. | |
2077 | ||
2078 | rcu_thread_online(); | |
2079 | /* | |
2080 | * This function dispatch the work to the kernel or userspace tracer | |
2081 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
2082 | * informations for the client. The command context struct contains | |
2083 | * everything this function may needs. | |
2084 | */ | |
3e3665b8 | 2085 | ret = process_client_msg(cmd_ctx, &sock, &sock_error); |
917a718d JG |
2086 | rcu_thread_offline(); |
2087 | if (ret < 0) { | |
3e3665b8 JG |
2088 | if (sock >= 0) { |
2089 | ret = close(sock); | |
2090 | if (ret) { | |
2091 | PERROR("close"); | |
2092 | } | |
2093 | } | |
2094 | sock = -1; | |
917a718d JG |
2095 | /* |
2096 | * TODO: Inform client somehow of the fatal error. At | |
2097 | * this point, ret < 0 means that a zmalloc failed | |
2098 | * (ENOMEM). Error detected but still accept | |
2099 | * command, unless a socket error has been | |
2100 | * detected. | |
2101 | */ | |
2102 | clean_command_ctx(&cmd_ctx); | |
2103 | continue; | |
2104 | } | |
2105 | ||
2106 | cmd_completion_handler = cmd_pop_completion_handler(); | |
2107 | if (cmd_completion_handler) { | |
2108 | enum lttng_error_code completion_code; | |
2109 | ||
2110 | completion_code = cmd_completion_handler->run( | |
2111 | cmd_completion_handler->data); | |
2112 | if (completion_code != LTTNG_OK) { | |
2113 | clean_command_ctx(&cmd_ctx); | |
2114 | continue; | |
2115 | } | |
2116 | } | |
2117 | ||
2118 | health_code_update(); | |
2119 | ||
3e3665b8 JG |
2120 | if (sock >= 0) { |
2121 | DBG("Sending response (size: %d, retcode: %s (%d))", | |
2122 | cmd_ctx->lttng_msg_size, | |
2123 | lttng_strerror(-cmd_ctx->llm->ret_code), | |
2124 | cmd_ctx->llm->ret_code); | |
2125 | ret = send_unix_sock(sock, cmd_ctx->llm, | |
2126 | cmd_ctx->lttng_msg_size); | |
2127 | if (ret < 0) { | |
2128 | ERR("Failed to send data back to client"); | |
2129 | } | |
917a718d | 2130 | |
3e3665b8 JG |
2131 | /* End of transmission */ |
2132 | ret = close(sock); | |
2133 | if (ret) { | |
2134 | PERROR("close"); | |
2135 | } | |
2136 | } | |
2137 | sock = -1; | |
917a718d JG |
2138 | |
2139 | clean_command_ctx(&cmd_ctx); | |
2140 | ||
2141 | health_code_update(); | |
2142 | } | |
2143 | ||
2144 | exit: | |
2145 | error: | |
2146 | if (sock >= 0) { | |
2147 | ret = close(sock); | |
2148 | if (ret) { | |
2149 | PERROR("close"); | |
2150 | } | |
2151 | } | |
2152 | ||
2153 | lttng_poll_clean(&events); | |
2154 | clean_command_ctx(&cmd_ctx); | |
2155 | ||
2156 | error_listen: | |
2157 | error_create_poll: | |
2158 | unlink(config.client_unix_sock_path.value); | |
0f68efb6 JG |
2159 | ret = close(client_sock); |
2160 | if (ret) { | |
2161 | PERROR("close"); | |
917a718d JG |
2162 | } |
2163 | ||
2164 | if (err) { | |
2165 | health_error(); | |
2166 | ERR("Health error occurred in %s", __func__); | |
2167 | } | |
2168 | ||
2169 | health_unregister(health_sessiond); | |
2170 | ||
2171 | DBG("Client thread dying"); | |
2172 | ||
2173 | rcu_unregister_thread(); | |
917a718d JG |
2174 | return NULL; |
2175 | } | |
2176 | ||
2177 | static | |
2178 | bool shutdown_client_thread(void *thread_data) | |
2179 | { | |
2180 | struct lttng_pipe *client_quit_pipe = thread_data; | |
2181 | const int write_fd = lttng_pipe_get_writefd(client_quit_pipe); | |
2182 | ||
2183 | return notify_thread_pipe(write_fd) == 1; | |
2184 | } | |
2185 | ||
2186 | struct lttng_thread *launch_client_thread(void) | |
2187 | { | |
6cb45e93 | 2188 | bool thread_running; |
917a718d | 2189 | struct lttng_pipe *client_quit_pipe; |
0f68efb6 JG |
2190 | struct lttng_thread *thread = NULL; |
2191 | int client_sock_fd = -1; | |
917a718d | 2192 | |
6cb45e93 | 2193 | sem_init(&thread_state.ready, 0, 0); |
917a718d JG |
2194 | client_quit_pipe = lttng_pipe_open(FD_CLOEXEC); |
2195 | if (!client_quit_pipe) { | |
2196 | goto error; | |
2197 | } | |
2198 | ||
0f68efb6 JG |
2199 | client_sock_fd = create_client_sock(); |
2200 | if (client_sock_fd < 0) { | |
2201 | goto error; | |
2202 | } | |
2203 | ||
2204 | thread_state.client_sock = client_sock_fd; | |
917a718d JG |
2205 | thread = lttng_thread_create("Client management", |
2206 | thread_manage_clients, | |
2207 | shutdown_client_thread, | |
2208 | cleanup_client_thread, | |
2209 | client_quit_pipe); | |
2210 | if (!thread) { | |
2211 | goto error; | |
2212 | } | |
0f68efb6 JG |
2213 | /* The client thread now owns the client sock fd and the quit pipe. */ |
2214 | client_sock_fd = -1; | |
2215 | client_quit_pipe = NULL; | |
917a718d JG |
2216 | |
2217 | /* | |
2218 | * This thread is part of the threads that need to be fully | |
2219 | * initialized before the session daemon is marked as "ready". | |
2220 | */ | |
6cb45e93 JG |
2221 | thread_running = wait_thread_status(); |
2222 | if (!thread_running) { | |
0f68efb6 | 2223 | goto error; |
6cb45e93 | 2224 | } |
917a718d JG |
2225 | return thread; |
2226 | error: | |
0f68efb6 JG |
2227 | if (client_sock_fd >= 0) { |
2228 | if (close(client_sock_fd)) { | |
2229 | PERROR("Failed to close client socket"); | |
2230 | } | |
2231 | } | |
2232 | lttng_thread_put(thread); | |
917a718d JG |
2233 | cleanup_client_thread(client_quit_pipe); |
2234 | return NULL; | |
2235 | } |