Commit | Line | Data |
---|---|---|
917a718d | 1 | /* |
21cf9b6b | 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 | ||
28ab034a JG |
10 | #include "agent-thread.hpp" |
11 | #include "clear.hpp" | |
12 | #include "client.hpp" | |
13 | #include "cmd.hpp" | |
c9e313bc SM |
14 | #include "common/buffer-view.hpp" |
15 | #include "common/compat/socket.hpp" | |
16 | #include "common/dynamic-array.hpp" | |
17 | #include "common/dynamic-buffer.hpp" | |
18 | #include "common/fd-handle.hpp" | |
19 | #include "common/payload-view.hpp" | |
20 | #include "common/payload.hpp" | |
21 | #include "common/sessiond-comm/sessiond-comm.hpp" | |
28ab034a JG |
22 | #include "health-sessiond.hpp" |
23 | #include "kernel.hpp" | |
24 | #include "lttng-sessiond.hpp" | |
159b042f JG |
25 | #include "lttng/lttng-error.h" |
26 | #include "lttng/tracker.h" | |
28ab034a JG |
27 | #include "manage-consumer.hpp" |
28 | #include "save.hpp" | |
29 | #include "testpoint.hpp" | |
30 | #include "utils.hpp" | |
31 | ||
c9e313bc SM |
32 | #include <common/compat/getenv.hpp> |
33 | #include <common/tracker.hpp> | |
34 | #include <common/unix.hpp> | |
35 | #include <common/utils.hpp> | |
28ab034a | 36 | |
c9e313bc SM |
37 | #include <lttng/error-query-internal.hpp> |
38 | #include <lttng/event-internal.hpp> | |
39 | #include <lttng/session-descriptor-internal.hpp> | |
40 | #include <lttng/session-internal.hpp> | |
41 | #include <lttng/userspace-probe-internal.hpp> | |
28ab034a | 42 | |
671e39d7 | 43 | #include <fcntl.h> |
159b042f JG |
44 | #include <pthread.h> |
45 | #include <signal.h> | |
46 | #include <stddef.h> | |
999af9c1 | 47 | #include <stdint.h> |
159b042f | 48 | #include <sys/stat.h> |
1434fd36 | 49 | #include <unistd.h> |
917a718d | 50 | |
f1494934 JG |
51 | namespace { |
52 | bool is_root; | |
917a718d | 53 | |
f1494934 | 54 | struct thread_state { |
6cb45e93 JG |
55 | sem_t ready; |
56 | bool running; | |
0f68efb6 | 57 | int client_sock; |
6cb45e93 | 58 | } thread_state; |
f1494934 | 59 | } /* namespace */ |
6cb45e93 JG |
60 | |
61 | static void set_thread_status(bool running) | |
917a718d | 62 | { |
6cb45e93 JG |
63 | DBG("Marking client thread's state as %s", running ? "running" : "error"); |
64 | thread_state.running = running; | |
65 | sem_post(&thread_state.ready); | |
917a718d JG |
66 | } |
67 | ||
cd9adb8b | 68 | static bool wait_thread_status() |
917a718d | 69 | { |
6cb45e93 JG |
70 | DBG("Waiting for client thread to be ready"); |
71 | sem_wait(&thread_state.ready); | |
72 | if (thread_state.running) { | |
73 | DBG("Client thread is ready"); | |
74 | } else { | |
75 | ERR("Initialization of client thread failed"); | |
917a718d | 76 | } |
6cb45e93 JG |
77 | |
78 | return thread_state.running; | |
917a718d JG |
79 | } |
80 | ||
81 | /* | |
82 | * Setup the outgoing data buffer for the response (llm) by allocating the | |
83 | * right amount of memory and copying the original information from the lsm | |
84 | * structure. | |
85 | * | |
86 | * Return 0 on success, negative value on error. | |
87 | */ | |
88 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, | |
28ab034a JG |
89 | const void *payload_buf, |
90 | size_t payload_len, | |
91 | const void *cmd_header_buf, | |
92 | size_t cmd_header_len) | |
917a718d JG |
93 | { |
94 | int ret = 0; | |
95 | const size_t header_len = sizeof(struct lttcomm_lttng_msg); | |
917a718d | 96 | const size_t total_msg_size = header_len + cmd_header_len + payload_len; |
28ab034a | 97 | lttcomm_lttng_msg llm{}; |
7966af57 SM |
98 | |
99 | llm.cmd_type = cmd_ctx->lsm.cmd_type; | |
100 | llm.pid = (uint32_t) cmd_ctx->lsm.domain.attr.pid; | |
101 | llm.cmd_header_size = (uint32_t) cmd_header_len; | |
102 | llm.data_size = (uint32_t) payload_len; | |
917a718d | 103 | |
2eb1b01f JR |
104 | ret = lttng_dynamic_buffer_set_size(&cmd_ctx->reply_payload.buffer, 0); |
105 | if (ret) { | |
106 | goto end; | |
107 | } | |
108 | ||
fe489250 | 109 | lttng_dynamic_pointer_array_clear(&cmd_ctx->reply_payload._fd_handles); |
917a718d | 110 | |
3a91de3a JG |
111 | cmd_ctx->lttng_msg_size = total_msg_size; |
112 | ||
113 | /* Append reply header. */ | |
28ab034a | 114 | ret = lttng_dynamic_buffer_append(&cmd_ctx->reply_payload.buffer, &llm, sizeof(llm)); |
3a91de3a | 115 | if (ret) { |
917a718d JG |
116 | goto end; |
117 | } | |
118 | ||
3a91de3a | 119 | /* Append command header. */ |
917a718d | 120 | if (cmd_header_len) { |
3a91de3a | 121 | ret = lttng_dynamic_buffer_append( |
28ab034a | 122 | &cmd_ctx->reply_payload.buffer, cmd_header_buf, cmd_header_len); |
3a91de3a JG |
123 | if (ret) { |
124 | goto end; | |
125 | } | |
917a718d JG |
126 | } |
127 | ||
3a91de3a | 128 | /* Append payload. */ |
917a718d | 129 | if (payload_len) { |
3a91de3a | 130 | ret = lttng_dynamic_buffer_append( |
28ab034a | 131 | &cmd_ctx->reply_payload.buffer, payload_buf, payload_len); |
3a91de3a JG |
132 | if (ret) { |
133 | goto end; | |
134 | } | |
917a718d JG |
135 | } |
136 | ||
137 | end: | |
138 | return ret; | |
139 | } | |
140 | ||
e368fb43 JG |
141 | static int setup_empty_lttng_msg(struct command_ctx *cmd_ctx) |
142 | { | |
143 | int ret; | |
144 | const struct lttcomm_lttng_msg llm = {}; | |
145 | ||
64defc29 JR |
146 | ret = lttng_dynamic_buffer_set_size(&cmd_ctx->reply_payload.buffer, 0); |
147 | if (ret) { | |
148 | goto end; | |
149 | } | |
e368fb43 JG |
150 | |
151 | /* Append place-holder reply header. */ | |
28ab034a | 152 | ret = lttng_dynamic_buffer_append(&cmd_ctx->reply_payload.buffer, &llm, sizeof(llm)); |
e368fb43 JG |
153 | if (ret) { |
154 | goto end; | |
155 | } | |
156 | ||
157 | cmd_ctx->lttng_msg_size = sizeof(llm); | |
158 | end: | |
159 | return ret; | |
160 | } | |
161 | ||
28ab034a | 162 | static void update_lttng_msg(struct command_ctx *cmd_ctx, size_t cmd_header_len, size_t payload_len) |
e368fb43 JG |
163 | { |
164 | const size_t header_len = sizeof(struct lttcomm_lttng_msg); | |
165 | const size_t total_msg_size = header_len + cmd_header_len + payload_len; | |
e368fb43 | 166 | struct lttcomm_lttng_msg *p_llm; |
28ab034a | 167 | lttcomm_lttng_msg llm{}; |
7966af57 SM |
168 | |
169 | llm.cmd_type = cmd_ctx->lsm.cmd_type; | |
170 | llm.pid = (uint32_t) cmd_ctx->lsm.domain.attr.pid; | |
171 | llm.cmd_header_size = (uint32_t) cmd_header_len; | |
172 | llm.data_size = (uint32_t) payload_len; | |
e368fb43 | 173 | |
a0377dfe | 174 | LTTNG_ASSERT(cmd_ctx->reply_payload.buffer.size >= sizeof(llm)); |
e368fb43 JG |
175 | |
176 | p_llm = (typeof(p_llm)) cmd_ctx->reply_payload.buffer.data; | |
177 | ||
178 | /* Update existing header. */ | |
179 | memcpy(p_llm, &llm, sizeof(llm)); | |
180 | ||
181 | cmd_ctx->lttng_msg_size = total_msg_size; | |
182 | } | |
183 | ||
917a718d JG |
184 | /* |
185 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd | |
4ec029ed | 186 | * exec or it will fail. |
917a718d JG |
187 | */ |
188 | static int spawn_consumer_thread(struct consumer_data *consumer_data) | |
189 | { | |
4ec029ed | 190 | return launch_consumer_management_thread(consumer_data) ? 0 : -1; |
917a718d JG |
191 | } |
192 | ||
193 | /* | |
194 | * Fork and exec a consumer daemon (consumerd). | |
195 | * | |
196 | * Return pid if successful else -1. | |
197 | */ | |
198 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) | |
199 | { | |
200 | int ret; | |
201 | pid_t pid; | |
202 | const char *consumer_to_use; | |
203 | const char *verbosity; | |
204 | struct stat st; | |
205 | ||
206 | DBG("Spawning consumerd"); | |
207 | ||
208 | pid = fork(); | |
209 | if (pid == 0) { | |
210 | /* | |
211 | * Exec consumerd. | |
212 | */ | |
412d7227 | 213 | if (the_config.verbose_consumer) { |
917a718d JG |
214 | verbosity = "--verbose"; |
215 | } else if (lttng_opt_quiet) { | |
216 | verbosity = "--quiet"; | |
217 | } else { | |
218 | verbosity = ""; | |
219 | } | |
220 | ||
221 | switch (consumer_data->type) { | |
222 | case LTTNG_CONSUMER_KERNEL: | |
223 | /* | |
224 | * Find out which consumerd to execute. We will first try the | |
225 | * 64-bit path, then the sessiond's installation directory, and | |
226 | * fallback on the 32-bit one, | |
227 | */ | |
228 | DBG3("Looking for a kernel consumer at these locations:"); | |
28ab034a | 229 | DBG3(" 1) %s", the_config.consumerd64_bin_path.value ?: "NULL"); |
917a718d | 230 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, DEFAULT_CONSUMERD_FILE); |
28ab034a | 231 | DBG3(" 3) %s", the_config.consumerd32_bin_path.value ?: "NULL"); |
412d7227 | 232 | if (stat(the_config.consumerd64_bin_path.value, &st) == 0) { |
917a718d | 233 | DBG3("Found location #1"); |
412d7227 | 234 | consumer_to_use = the_config.consumerd64_bin_path.value; |
917a718d JG |
235 | } else if (stat(INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE, &st) == 0) { |
236 | DBG3("Found location #2"); | |
237 | consumer_to_use = INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE; | |
412d7227 | 238 | } else if (the_config.consumerd32_bin_path.value && |
28ab034a | 239 | stat(the_config.consumerd32_bin_path.value, &st) == 0) { |
917a718d | 240 | DBG3("Found location #3"); |
412d7227 | 241 | consumer_to_use = the_config.consumerd32_bin_path.value; |
917a718d JG |
242 | } else { |
243 | DBG("Could not find any valid consumerd executable"); | |
244 | ret = -EINVAL; | |
245 | goto error; | |
246 | } | |
28ab034a JG |
247 | DBG("Using kernel consumer at: %s", consumer_to_use); |
248 | (void) execl(consumer_to_use, | |
249 | "lttng-consumerd", | |
250 | verbosity, | |
251 | "-k", | |
252 | "--consumerd-cmd-sock", | |
253 | consumer_data->cmd_unix_sock_path, | |
254 | "--consumerd-err-sock", | |
255 | consumer_data->err_unix_sock_path, | |
256 | "--group", | |
257 | the_config.tracing_group_name.value, | |
258 | NULL); | |
917a718d JG |
259 | break; |
260 | case LTTNG_CONSUMER64_UST: | |
261 | { | |
412d7227 | 262 | if (the_config.consumerd64_lib_dir.value) { |
b53d4e59 | 263 | const char *tmp; |
917a718d JG |
264 | size_t tmplen; |
265 | char *tmpnew; | |
266 | ||
267 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); | |
268 | if (!tmp) { | |
269 | tmp = ""; | |
270 | } | |
28ab034a JG |
271 | tmplen = strlen(the_config.consumerd64_lib_dir.value) + 1 /* : */ + |
272 | strlen(tmp); | |
64803277 | 273 | tmpnew = zmalloc<char>(tmplen + 1 /* \0 */); |
917a718d JG |
274 | if (!tmpnew) { |
275 | ret = -ENOMEM; | |
276 | goto error; | |
277 | } | |
412d7227 | 278 | strcat(tmpnew, the_config.consumerd64_lib_dir.value); |
917a718d JG |
279 | if (tmp[0] != '\0') { |
280 | strcat(tmpnew, ":"); | |
281 | strcat(tmpnew, tmp); | |
282 | } | |
283 | ret = setenv("LD_LIBRARY_PATH", tmpnew, 1); | |
284 | free(tmpnew); | |
285 | if (ret) { | |
286 | ret = -errno; | |
287 | goto error; | |
288 | } | |
289 | } | |
412d7227 | 290 | DBG("Using 64-bit UST consumer at: %s", |
28ab034a | 291 | the_config.consumerd64_bin_path.value); |
412d7227 | 292 | (void) execl(the_config.consumerd64_bin_path.value, |
28ab034a JG |
293 | "lttng-consumerd", |
294 | verbosity, | |
295 | "-u", | |
296 | "--consumerd-cmd-sock", | |
297 | consumer_data->cmd_unix_sock_path, | |
298 | "--consumerd-err-sock", | |
299 | consumer_data->err_unix_sock_path, | |
300 | "--group", | |
301 | the_config.tracing_group_name.value, | |
302 | NULL); | |
917a718d JG |
303 | break; |
304 | } | |
305 | case LTTNG_CONSUMER32_UST: | |
306 | { | |
412d7227 | 307 | if (the_config.consumerd32_lib_dir.value) { |
b53d4e59 | 308 | const char *tmp; |
917a718d JG |
309 | size_t tmplen; |
310 | char *tmpnew; | |
311 | ||
312 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); | |
313 | if (!tmp) { | |
314 | tmp = ""; | |
315 | } | |
28ab034a JG |
316 | tmplen = strlen(the_config.consumerd32_lib_dir.value) + 1 /* : */ + |
317 | strlen(tmp); | |
64803277 | 318 | tmpnew = zmalloc<char>(tmplen + 1 /* \0 */); |
917a718d JG |
319 | if (!tmpnew) { |
320 | ret = -ENOMEM; | |
321 | goto error; | |
322 | } | |
412d7227 | 323 | strcat(tmpnew, the_config.consumerd32_lib_dir.value); |
917a718d JG |
324 | if (tmp[0] != '\0') { |
325 | strcat(tmpnew, ":"); | |
326 | strcat(tmpnew, tmp); | |
327 | } | |
328 | ret = setenv("LD_LIBRARY_PATH", tmpnew, 1); | |
329 | free(tmpnew); | |
330 | if (ret) { | |
331 | ret = -errno; | |
332 | goto error; | |
333 | } | |
334 | } | |
412d7227 | 335 | DBG("Using 32-bit UST consumer at: %s", |
28ab034a | 336 | the_config.consumerd32_bin_path.value); |
412d7227 | 337 | (void) execl(the_config.consumerd32_bin_path.value, |
28ab034a JG |
338 | "lttng-consumerd", |
339 | verbosity, | |
340 | "-u", | |
341 | "--consumerd-cmd-sock", | |
342 | consumer_data->cmd_unix_sock_path, | |
343 | "--consumerd-err-sock", | |
344 | consumer_data->err_unix_sock_path, | |
345 | "--group", | |
346 | the_config.tracing_group_name.value, | |
347 | NULL); | |
917a718d JG |
348 | break; |
349 | } | |
350 | default: | |
351 | ERR("unknown consumer type"); | |
352 | errno = 0; | |
353 | } | |
354 | if (errno != 0) { | |
355 | PERROR("Consumer execl()"); | |
356 | } | |
357 | /* Reaching this point, we got a failure on our execl(). */ | |
358 | exit(EXIT_FAILURE); | |
359 | } else if (pid > 0) { | |
360 | ret = pid; | |
361 | } else { | |
362 | PERROR("start consumer fork"); | |
363 | ret = -errno; | |
364 | } | |
365 | error: | |
366 | return ret; | |
367 | } | |
368 | ||
369 | /* | |
370 | * Spawn the consumerd daemon and session daemon thread. | |
371 | */ | |
372 | static int start_consumerd(struct consumer_data *consumer_data) | |
373 | { | |
374 | int ret; | |
375 | ||
376 | /* | |
377 | * Set the listen() state on the socket since there is a possible race | |
378 | * between the exec() of the consumer daemon and this call if place in the | |
379 | * consumer thread. See bug #366 for more details. | |
380 | */ | |
381 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
382 | if (ret < 0) { | |
383 | goto error; | |
384 | } | |
385 | ||
386 | pthread_mutex_lock(&consumer_data->pid_mutex); | |
387 | if (consumer_data->pid != 0) { | |
388 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
389 | goto end; | |
390 | } | |
391 | ||
392 | ret = spawn_consumerd(consumer_data); | |
393 | if (ret < 0) { | |
394 | ERR("Spawning consumerd failed"); | |
395 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
396 | goto error; | |
397 | } | |
398 | ||
399 | /* Setting up the consumer_data pid */ | |
400 | consumer_data->pid = ret; | |
401 | DBG2("Consumer pid %d", consumer_data->pid); | |
402 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
403 | ||
404 | DBG2("Spawning consumer control thread"); | |
405 | ret = spawn_consumer_thread(consumer_data); | |
406 | if (ret < 0) { | |
407 | ERR("Fatal error spawning consumer control thread"); | |
408 | goto error; | |
409 | } | |
410 | ||
411 | end: | |
412 | return 0; | |
413 | ||
414 | error: | |
415 | /* Cleanup already created sockets on error. */ | |
416 | if (consumer_data->err_sock >= 0) { | |
417 | int err; | |
418 | ||
419 | err = close(consumer_data->err_sock); | |
420 | if (err < 0) { | |
421 | PERROR("close consumer data error socket"); | |
422 | } | |
423 | } | |
424 | return ret; | |
425 | } | |
426 | ||
427 | /* | |
428 | * Copy consumer output from the tracing session to the domain session. The | |
429 | * function also applies the right modification on a per domain basis for the | |
430 | * trace files destination directory. | |
917a718d JG |
431 | */ |
432 | static int copy_session_consumer(int domain, struct ltt_session *session) | |
433 | { | |
434 | int ret; | |
435 | const char *dir_name; | |
436 | struct consumer_output *consumer; | |
437 | ||
a0377dfe FD |
438 | LTTNG_ASSERT(session); |
439 | LTTNG_ASSERT(session->consumer); | |
917a718d JG |
440 | |
441 | switch (domain) { | |
442 | case LTTNG_DOMAIN_KERNEL: | |
443 | DBG3("Copying tracing session consumer output in kernel session"); | |
444 | /* | |
445 | * XXX: We should audit the session creation and what this function | |
446 | * does "extra" in order to avoid a destroy since this function is used | |
447 | * in the domain session creation (kernel and ust) only. Same for UST | |
448 | * domain. | |
449 | */ | |
450 | if (session->kernel_session->consumer) { | |
451 | consumer_output_put(session->kernel_session->consumer); | |
452 | } | |
28ab034a | 453 | session->kernel_session->consumer = consumer_copy_output(session->consumer); |
917a718d JG |
454 | /* Ease our life a bit for the next part */ |
455 | consumer = session->kernel_session->consumer; | |
456 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
457 | break; | |
458 | case LTTNG_DOMAIN_JUL: | |
459 | case LTTNG_DOMAIN_LOG4J: | |
460 | case LTTNG_DOMAIN_PYTHON: | |
461 | case LTTNG_DOMAIN_UST: | |
462 | DBG3("Copying tracing session consumer output in UST session"); | |
463 | if (session->ust_session->consumer) { | |
464 | consumer_output_put(session->ust_session->consumer); | |
465 | } | |
28ab034a | 466 | session->ust_session->consumer = consumer_copy_output(session->consumer); |
917a718d JG |
467 | /* Ease our life a bit for the next part */ |
468 | consumer = session->ust_session->consumer; | |
469 | dir_name = DEFAULT_UST_TRACE_DIR; | |
470 | break; | |
471 | default: | |
472 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
473 | goto error; | |
474 | } | |
475 | ||
476 | /* Append correct directory to subdir */ | |
28ab034a | 477 | ret = lttng_strncpy(consumer->domain_subdir, dir_name, sizeof(consumer->domain_subdir)); |
b178f53e JG |
478 | if (ret) { |
479 | ret = LTTNG_ERR_UNK; | |
480 | goto error; | |
481 | } | |
482 | DBG3("Copy session consumer subdir %s", consumer->domain_subdir); | |
917a718d JG |
483 | ret = LTTNG_OK; |
484 | ||
485 | error: | |
486 | return ret; | |
487 | } | |
488 | ||
489 | /* | |
490 | * Create an UST session and add it to the session ust list. | |
917a718d | 491 | */ |
28ab034a | 492 | static int create_ust_session(struct ltt_session *session, const struct lttng_domain *domain) |
917a718d JG |
493 | { |
494 | int ret; | |
cd9adb8b | 495 | struct ltt_ust_session *lus = nullptr; |
917a718d | 496 | |
a0377dfe FD |
497 | LTTNG_ASSERT(session); |
498 | LTTNG_ASSERT(domain); | |
499 | LTTNG_ASSERT(session->consumer); | |
917a718d JG |
500 | |
501 | switch (domain->type) { | |
502 | case LTTNG_DOMAIN_JUL: | |
503 | case LTTNG_DOMAIN_LOG4J: | |
504 | case LTTNG_DOMAIN_PYTHON: | |
505 | case LTTNG_DOMAIN_UST: | |
506 | break; | |
507 | default: | |
508 | ERR("Unknown UST domain on create session %d", domain->type); | |
509 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
510 | goto error; | |
511 | } | |
512 | ||
513 | DBG("Creating UST session"); | |
514 | ||
515 | lus = trace_ust_create_session(session->id); | |
cd9adb8b | 516 | if (lus == nullptr) { |
917a718d JG |
517 | ret = LTTNG_ERR_UST_SESS_FAIL; |
518 | goto error; | |
519 | } | |
520 | ||
521 | lus->uid = session->uid; | |
522 | lus->gid = session->gid; | |
523 | lus->output_traces = session->output_traces; | |
524 | lus->snapshot_mode = session->snapshot_mode; | |
525 | lus->live_timer_interval = session->live_timer; | |
526 | session->ust_session = lus; | |
527 | if (session->shm_path[0]) { | |
28ab034a | 528 | strncpy(lus->root_shm_path, session->shm_path, sizeof(lus->root_shm_path)); |
917a718d | 529 | lus->root_shm_path[sizeof(lus->root_shm_path) - 1] = '\0'; |
28ab034a | 530 | strncpy(lus->shm_path, session->shm_path, sizeof(lus->shm_path)); |
917a718d | 531 | lus->shm_path[sizeof(lus->shm_path) - 1] = '\0'; |
28ab034a | 532 | strncat(lus->shm_path, "/ust", sizeof(lus->shm_path) - strlen(lus->shm_path) - 1); |
917a718d JG |
533 | } |
534 | /* Copy session output to the newly created UST session */ | |
535 | ret = copy_session_consumer(domain->type, session); | |
536 | if (ret != LTTNG_OK) { | |
537 | goto error; | |
538 | } | |
539 | ||
540 | return LTTNG_OK; | |
541 | ||
542 | error: | |
543 | free(lus); | |
cd9adb8b | 544 | session->ust_session = nullptr; |
917a718d JG |
545 | return ret; |
546 | } | |
547 | ||
548 | /* | |
549 | * Create a kernel tracer session then create the default channel. | |
550 | */ | |
551 | static int create_kernel_session(struct ltt_session *session) | |
552 | { | |
553 | int ret; | |
554 | ||
555 | DBG("Creating kernel session"); | |
556 | ||
7d268848 | 557 | ret = kernel_create_session(session); |
917a718d JG |
558 | if (ret < 0) { |
559 | ret = LTTNG_ERR_KERN_SESS_FAIL; | |
5d0a7bcb | 560 | goto error_create; |
917a718d JG |
561 | } |
562 | ||
563 | /* Code flow safety */ | |
a0377dfe | 564 | LTTNG_ASSERT(session->kernel_session); |
917a718d JG |
565 | |
566 | /* Copy session output to the newly created Kernel session */ | |
567 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
568 | if (ret != LTTNG_OK) { | |
569 | goto error; | |
570 | } | |
571 | ||
572 | session->kernel_session->uid = session->uid; | |
573 | session->kernel_session->gid = session->gid; | |
574 | session->kernel_session->output_traces = session->output_traces; | |
575 | session->kernel_session->snapshot_mode = session->snapshot_mode; | |
a2814ea7 | 576 | session->kernel_session->is_live_session = session->live_timer != 0; |
917a718d JG |
577 | |
578 | return LTTNG_OK; | |
579 | ||
580 | error: | |
581 | trace_kernel_destroy_session(session->kernel_session); | |
cd9adb8b | 582 | session->kernel_session = nullptr; |
5d0a7bcb | 583 | error_create: |
917a718d JG |
584 | return ret; |
585 | } | |
586 | ||
587 | /* | |
588 | * Count number of session permitted by uid/gid. | |
589 | */ | |
28ab034a | 590 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid __attribute__((unused))) |
917a718d JG |
591 | { |
592 | unsigned int i = 0; | |
593 | struct ltt_session *session; | |
594 | const struct ltt_session_list *session_list = session_get_list(); | |
595 | ||
d7b377ed | 596 | DBG("Counting number of available session for UID %d", uid); |
28ab034a | 597 | cds_list_for_each_entry (session, &session_list->head, list) { |
917a718d JG |
598 | if (!session_get(session)) { |
599 | continue; | |
600 | } | |
601 | session_lock(session); | |
602 | /* Only count the sessions the user can control. */ | |
28ab034a | 603 | if (session_access_ok(session, uid) && !session->destroyed) { |
917a718d JG |
604 | i++; |
605 | } | |
606 | session_unlock(session); | |
607 | session_put(session); | |
608 | } | |
609 | return i; | |
610 | } | |
611 | ||
746e08d7 | 612 | static enum lttng_error_code receive_lttng_trigger(struct command_ctx *cmd_ctx, |
28ab034a JG |
613 | int sock, |
614 | int *sock_error, | |
615 | struct lttng_trigger **_trigger) | |
746e08d7 JG |
616 | { |
617 | int ret; | |
618 | size_t trigger_len; | |
619 | ssize_t sock_recv_len; | |
620 | enum lttng_error_code ret_code; | |
621 | struct lttng_payload trigger_payload; | |
cd9adb8b | 622 | struct lttng_trigger *trigger = nullptr; |
746e08d7 JG |
623 | |
624 | lttng_payload_init(&trigger_payload); | |
625 | trigger_len = (size_t) cmd_ctx->lsm.u.trigger.length; | |
28ab034a | 626 | ret = lttng_dynamic_buffer_set_size(&trigger_payload.buffer, trigger_len); |
746e08d7 JG |
627 | if (ret) { |
628 | ret_code = LTTNG_ERR_NOMEM; | |
629 | goto end; | |
630 | } | |
631 | ||
28ab034a | 632 | sock_recv_len = lttcomm_recv_unix_sock(sock, trigger_payload.buffer.data, trigger_len); |
746e08d7 JG |
633 | if (sock_recv_len < 0 || sock_recv_len != trigger_len) { |
634 | ERR("Failed to receive trigger in command payload"); | |
635 | *sock_error = 1; | |
636 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
637 | goto end; | |
638 | } | |
639 | ||
640 | /* Receive fds, if any. */ | |
641 | if (cmd_ctx->lsm.fd_count > 0) { | |
642 | sock_recv_len = lttcomm_recv_payload_fds_unix_sock( | |
28ab034a JG |
643 | sock, cmd_ctx->lsm.fd_count, &trigger_payload); |
644 | if (sock_recv_len > 0 && sock_recv_len != cmd_ctx->lsm.fd_count * sizeof(int)) { | |
746e08d7 | 645 | ERR("Failed to receive all file descriptors for trigger in command payload: expected fd count = %u, ret = %d", |
28ab034a JG |
646 | cmd_ctx->lsm.fd_count, |
647 | (int) ret); | |
746e08d7 JG |
648 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; |
649 | *sock_error = 1; | |
650 | goto end; | |
651 | } else if (sock_recv_len <= 0) { | |
652 | ERR("Failed to receive file descriptors for trigger in command payload: expected fd count = %u, ret = %d", | |
28ab034a JG |
653 | cmd_ctx->lsm.fd_count, |
654 | (int) ret); | |
746e08d7 JG |
655 | ret_code = LTTNG_ERR_FATAL; |
656 | *sock_error = 1; | |
657 | goto end; | |
658 | } | |
659 | } | |
660 | ||
661 | /* Deserialize trigger. */ | |
662 | { | |
663 | struct lttng_payload_view view = | |
28ab034a | 664 | lttng_payload_view_from_payload(&trigger_payload, 0, -1); |
746e08d7 | 665 | |
28ab034a | 666 | if (lttng_trigger_create_from_payload(&view, &trigger) != trigger_len) { |
746e08d7 JG |
667 | ERR("Invalid trigger received as part of command payload"); |
668 | ret_code = LTTNG_ERR_INVALID_TRIGGER; | |
b5ef1685 | 669 | lttng_trigger_put(trigger); |
746e08d7 JG |
670 | goto end; |
671 | } | |
672 | } | |
673 | ||
674 | *_trigger = trigger; | |
675 | ret_code = LTTNG_OK; | |
676 | ||
677 | end: | |
bae46a81 | 678 | lttng_payload_reset(&trigger_payload); |
746e08d7 JG |
679 | return ret_code; |
680 | } | |
681 | ||
588c4b0d | 682 | static enum lttng_error_code receive_lttng_error_query(struct command_ctx *cmd_ctx, |
28ab034a JG |
683 | int sock, |
684 | int *sock_error, | |
685 | struct lttng_error_query **_query) | |
588c4b0d JG |
686 | { |
687 | int ret; | |
688 | size_t query_len; | |
689 | ssize_t sock_recv_len; | |
690 | enum lttng_error_code ret_code; | |
691 | struct lttng_payload query_payload; | |
cd9adb8b | 692 | struct lttng_error_query *query = nullptr; |
588c4b0d JG |
693 | |
694 | lttng_payload_init(&query_payload); | |
695 | query_len = (size_t) cmd_ctx->lsm.u.error_query.length; | |
696 | ret = lttng_dynamic_buffer_set_size(&query_payload.buffer, query_len); | |
697 | if (ret) { | |
698 | ret_code = LTTNG_ERR_NOMEM; | |
699 | goto end; | |
700 | } | |
701 | ||
28ab034a | 702 | sock_recv_len = lttcomm_recv_unix_sock(sock, query_payload.buffer.data, query_len); |
588c4b0d JG |
703 | if (sock_recv_len < 0 || sock_recv_len != query_len) { |
704 | ERR("Failed to receive error query in command payload"); | |
705 | *sock_error = 1; | |
706 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
707 | goto end; | |
708 | } | |
709 | ||
710 | /* Receive fds, if any. */ | |
711 | if (cmd_ctx->lsm.fd_count > 0) { | |
712 | sock_recv_len = lttcomm_recv_payload_fds_unix_sock( | |
28ab034a JG |
713 | sock, cmd_ctx->lsm.fd_count, &query_payload); |
714 | if (sock_recv_len > 0 && sock_recv_len != cmd_ctx->lsm.fd_count * sizeof(int)) { | |
588c4b0d | 715 | ERR("Failed to receive all file descriptors for error query in command payload: expected fd count = %u, ret = %d", |
28ab034a JG |
716 | cmd_ctx->lsm.fd_count, |
717 | (int) ret); | |
588c4b0d JG |
718 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; |
719 | *sock_error = 1; | |
720 | goto end; | |
721 | } else if (sock_recv_len <= 0) { | |
722 | ERR("Failed to receive file descriptors for error query in command payload: expected fd count = %u, ret = %d", | |
28ab034a JG |
723 | cmd_ctx->lsm.fd_count, |
724 | (int) ret); | |
588c4b0d JG |
725 | ret_code = LTTNG_ERR_FATAL; |
726 | *sock_error = 1; | |
727 | goto end; | |
728 | } | |
729 | } | |
730 | ||
731 | /* Deserialize error query. */ | |
732 | { | |
733 | struct lttng_payload_view view = | |
28ab034a | 734 | lttng_payload_view_from_payload(&query_payload, 0, -1); |
588c4b0d | 735 | |
28ab034a | 736 | if (lttng_error_query_create_from_payload(&view, &query) != query_len) { |
588c4b0d JG |
737 | ERR("Invalid error query received as part of command payload"); |
738 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
739 | goto end; | |
740 | } | |
741 | } | |
742 | ||
743 | *_query = query; | |
744 | ret_code = LTTNG_OK; | |
745 | ||
746 | end: | |
747 | lttng_payload_reset(&query_payload); | |
748 | return ret_code; | |
749 | } | |
750 | ||
8ddd72ef | 751 | static enum lttng_error_code receive_lttng_event(struct command_ctx *cmd_ctx, |
28ab034a JG |
752 | int sock, |
753 | int *sock_error, | |
754 | struct lttng_event **out_event, | |
755 | char **out_filter_expression, | |
756 | struct lttng_bytecode **out_bytecode, | |
757 | struct lttng_event_exclusion **out_exclusion) | |
8ddd72ef JR |
758 | { |
759 | int ret; | |
760 | size_t event_len; | |
761 | ssize_t sock_recv_len; | |
762 | enum lttng_error_code ret_code; | |
763 | struct lttng_payload event_payload; | |
cd9adb8b JG |
764 | struct lttng_event *local_event = nullptr; |
765 | char *local_filter_expression = nullptr; | |
766 | struct lttng_bytecode *local_bytecode = nullptr; | |
767 | struct lttng_event_exclusion *local_exclusion = nullptr; | |
8ddd72ef JR |
768 | |
769 | lttng_payload_init(&event_payload); | |
37a5ef39 | 770 | if (cmd_ctx->lsm.cmd_type == LTTCOMM_SESSIOND_COMMAND_ENABLE_EVENT) { |
8ddd72ef | 771 | event_len = (size_t) cmd_ctx->lsm.u.enable.length; |
37a5ef39 | 772 | } else if (cmd_ctx->lsm.cmd_type == LTTCOMM_SESSIOND_COMMAND_DISABLE_EVENT) { |
8ddd72ef JR |
773 | event_len = (size_t) cmd_ctx->lsm.u.disable.length; |
774 | } else { | |
775 | abort(); | |
776 | } | |
777 | ||
778 | ret = lttng_dynamic_buffer_set_size(&event_payload.buffer, event_len); | |
779 | if (ret) { | |
780 | ret_code = LTTNG_ERR_NOMEM; | |
781 | goto end; | |
782 | } | |
783 | ||
28ab034a | 784 | sock_recv_len = lttcomm_recv_unix_sock(sock, event_payload.buffer.data, event_len); |
8ddd72ef JR |
785 | if (sock_recv_len < 0 || sock_recv_len != event_len) { |
786 | ERR("Failed to receive event in command payload"); | |
787 | *sock_error = 1; | |
788 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
789 | goto end; | |
790 | } | |
791 | ||
792 | /* Receive fds, if any. */ | |
793 | if (cmd_ctx->lsm.fd_count > 0) { | |
794 | sock_recv_len = lttcomm_recv_payload_fds_unix_sock( | |
28ab034a JG |
795 | sock, cmd_ctx->lsm.fd_count, &event_payload); |
796 | if (sock_recv_len > 0 && sock_recv_len != cmd_ctx->lsm.fd_count * sizeof(int)) { | |
8ddd72ef | 797 | ERR("Failed to receive all file descriptors for event in command payload: expected fd count = %u, ret = %d", |
28ab034a JG |
798 | cmd_ctx->lsm.fd_count, |
799 | (int) ret); | |
8ddd72ef JR |
800 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; |
801 | *sock_error = 1; | |
802 | goto end; | |
803 | } else if (sock_recv_len <= 0) { | |
804 | ERR("Failed to receive file descriptors for event in command payload: expected fd count = %u, ret = %d", | |
28ab034a JG |
805 | cmd_ctx->lsm.fd_count, |
806 | (int) ret); | |
8ddd72ef JR |
807 | ret_code = LTTNG_ERR_FATAL; |
808 | *sock_error = 1; | |
809 | goto end; | |
810 | } | |
811 | } | |
812 | ||
813 | /* Deserialize event. */ | |
814 | { | |
9610c0c5 | 815 | ssize_t len; |
8ddd72ef | 816 | struct lttng_payload_view event_view = |
28ab034a | 817 | lttng_payload_view_from_payload(&event_payload, 0, -1); |
8ddd72ef | 818 | |
28ab034a JG |
819 | len = lttng_event_create_from_payload(&event_view, |
820 | &local_event, | |
821 | &local_exclusion, | |
822 | &local_filter_expression, | |
823 | &local_bytecode); | |
9610c0c5 JR |
824 | |
825 | if (len < 0) { | |
826 | ERR("Failed to create an event from the received buffer"); | |
827 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
828 | goto end; | |
829 | } | |
830 | ||
831 | if (len != event_len) { | |
28ab034a JG |
832 | ERR("Userspace probe location from the received buffer is not the advertised length: header length = %zu" PRIu32 |
833 | ", payload length = %zd", | |
834 | event_len, | |
835 | len); | |
8ddd72ef JR |
836 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; |
837 | goto end; | |
838 | } | |
839 | } | |
840 | ||
9610c0c5 JR |
841 | *out_event = local_event; |
842 | *out_exclusion = local_exclusion; | |
843 | *out_filter_expression = local_filter_expression; | |
844 | *out_bytecode = local_bytecode; | |
cd9adb8b JG |
845 | local_event = nullptr; |
846 | local_exclusion = nullptr; | |
847 | local_filter_expression = nullptr; | |
848 | local_bytecode = nullptr; | |
9610c0c5 | 849 | |
8ddd72ef JR |
850 | ret_code = LTTNG_OK; |
851 | ||
852 | end: | |
853 | lttng_payload_reset(&event_payload); | |
9610c0c5 JR |
854 | lttng_event_destroy(local_event); |
855 | free(local_filter_expression); | |
856 | free(local_bytecode); | |
857 | free(local_exclusion); | |
8ddd72ef JR |
858 | return ret_code; |
859 | } | |
860 | ||
28ab034a JG |
861 | static enum lttng_error_code |
862 | receive_lttng_event_context(const struct command_ctx *cmd_ctx, | |
863 | int sock, | |
864 | int *sock_error, | |
865 | struct lttng_event_context **out_event_context) | |
26e1c61f JR |
866 | { |
867 | int ret; | |
28ab034a | 868 | const size_t event_context_len = (size_t) cmd_ctx->lsm.u.context.length; |
26e1c61f JR |
869 | ssize_t sock_recv_len; |
870 | enum lttng_error_code ret_code; | |
871 | struct lttng_payload event_context_payload; | |
cd9adb8b | 872 | struct lttng_event_context *context = nullptr; |
26e1c61f JR |
873 | |
874 | lttng_payload_init(&event_context_payload); | |
875 | ||
28ab034a | 876 | ret = lttng_dynamic_buffer_set_size(&event_context_payload.buffer, event_context_len); |
26e1c61f JR |
877 | if (ret) { |
878 | ret_code = LTTNG_ERR_NOMEM; | |
879 | goto end; | |
880 | } | |
881 | ||
28ab034a JG |
882 | sock_recv_len = |
883 | lttcomm_recv_unix_sock(sock, event_context_payload.buffer.data, event_context_len); | |
26e1c61f JR |
884 | if (sock_recv_len < 0 || sock_recv_len != event_context_len) { |
885 | ERR("Failed to receive event context in command payload"); | |
886 | *sock_error = 1; | |
887 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
888 | goto end; | |
889 | } | |
890 | ||
891 | /* Deserialize event. */ | |
892 | { | |
129d59f5 | 893 | ssize_t len; |
26e1c61f | 894 | struct lttng_payload_view event_context_view = |
28ab034a | 895 | lttng_payload_view_from_payload(&event_context_payload, 0, -1); |
26e1c61f | 896 | |
28ab034a | 897 | len = lttng_event_context_create_from_payload(&event_context_view, &context); |
129d59f5 JR |
898 | |
899 | if (len < 0) { | |
900 | ERR("Failed to create a event context from the received buffer"); | |
901 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
902 | goto end; | |
903 | } | |
904 | ||
905 | if (len != event_context_len) { | |
28ab034a JG |
906 | ERR("Event context from the received buffer is not the advertised length: expected length = %zu, payload length = %zd", |
907 | event_context_len, | |
908 | len); | |
26e1c61f JR |
909 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; |
910 | goto end; | |
911 | } | |
912 | } | |
913 | ||
129d59f5 | 914 | *out_event_context = context; |
cd9adb8b | 915 | context = nullptr; |
26e1c61f JR |
916 | ret_code = LTTNG_OK; |
917 | ||
918 | end: | |
129d59f5 | 919 | lttng_event_context_destroy(context); |
26e1c61f JR |
920 | lttng_payload_reset(&event_context_payload); |
921 | return ret_code; | |
922 | } | |
923 | ||
917a718d JG |
924 | /* |
925 | * Version of setup_lttng_msg() without command header. | |
926 | */ | |
28ab034a JG |
927 | static int |
928 | setup_lttng_msg_no_cmd_header(struct command_ctx *cmd_ctx, void *payload_buf, size_t payload_len) | |
917a718d | 929 | { |
cd9adb8b | 930 | return setup_lttng_msg(cmd_ctx, payload_buf, payload_len, nullptr, 0); |
917a718d JG |
931 | } |
932 | ||
917a718d JG |
933 | /* |
934 | * Check if the current kernel tracer supports the session rotation feature. | |
935 | * Return 1 if it does, 0 otherwise. | |
936 | */ | |
cd9adb8b | 937 | static int check_rotate_compatible() |
917a718d JG |
938 | { |
939 | int ret = 1; | |
940 | ||
28ab034a | 941 | if (the_kernel_tracer_version.major != 2 || the_kernel_tracer_version.minor < 11) { |
917a718d JG |
942 | DBG("Kernel tracer version is not compatible with the rotation feature"); |
943 | ret = 0; | |
944 | } | |
945 | ||
946 | return ret; | |
947 | } | |
948 | ||
949 | /* | |
950 | * Send data on a unix socket using the liblttsessiondcomm API. | |
951 | * | |
952 | * Return lttcomm error code. | |
953 | */ | |
3a91de3a | 954 | static int send_unix_sock(int sock, struct lttng_payload_view *view) |
917a718d | 955 | { |
3a91de3a | 956 | int ret; |
fe489250 | 957 | const int fd_count = lttng_payload_view_get_fd_handle_count(view); |
3a91de3a | 958 | |
917a718d | 959 | /* Check valid length */ |
3a91de3a JG |
960 | if (view->buffer.size == 0) { |
961 | ret = -1; | |
962 | goto end; | |
963 | } | |
964 | ||
28ab034a | 965 | ret = lttcomm_send_unix_sock(sock, view->buffer.data, view->buffer.size); |
3a91de3a JG |
966 | if (ret < 0) { |
967 | goto end; | |
917a718d JG |
968 | } |
969 | ||
fe489250 | 970 | if (fd_count > 0) { |
700741dc JG |
971 | ret = lttcomm_send_payload_view_fds_unix_sock(sock, view); |
972 | if (ret < 0) { | |
973 | goto end; | |
fe489250 | 974 | } |
3a91de3a JG |
975 | } |
976 | ||
977 | end: | |
978 | return ret; | |
917a718d JG |
979 | } |
980 | ||
981 | /* | |
982 | * Process the command requested by the lttng client within the command | |
983 | * context structure. This function make sure that the return structure (llm) | |
984 | * is set and ready for transmission before returning. | |
985 | * | |
986 | * Return any error encountered or 0 for success. | |
987 | * | |
988 | * "sock" is only used for special-case var. len data. | |
3e3665b8 JG |
989 | * A command may assume the ownership of the socket, in which case its value |
990 | * should be set to -1. | |
917a718d | 991 | */ |
28ab034a | 992 | static int process_client_msg(struct command_ctx *cmd_ctx, int *sock, int *sock_error) |
917a718d JG |
993 | { |
994 | int ret = LTTNG_OK; | |
9124c630 JR |
995 | bool need_tracing_session = true; |
996 | bool need_domain; | |
997 | bool need_consumerd; | |
917a718d | 998 | |
6c1db447 JG |
999 | if (!lttcomm_sessiond_command_is_valid((lttcomm_sessiond_command) cmd_ctx->lsm.cmd_type)) { |
1000 | ERR("Unknown client command received: command id = %" PRIu32, | |
28ab034a | 1001 | cmd_ctx->lsm.cmd_type); |
6c1db447 JG |
1002 | ret = LTTNG_ERR_UND; |
1003 | goto error; | |
1004 | } | |
1005 | ||
19f912db | 1006 | DBG("Processing client command '%s\' (%d)", |
28ab034a JG |
1007 | lttcomm_sessiond_command_str((lttcomm_sessiond_command) cmd_ctx->lsm.cmd_type), |
1008 | cmd_ctx->lsm.cmd_type); | |
917a718d | 1009 | |
917a718d JG |
1010 | *sock_error = 0; |
1011 | ||
3a91de3a | 1012 | switch (cmd_ctx->lsm.cmd_type) { |
37a5ef39 JG |
1013 | case LTTCOMM_SESSIOND_COMMAND_CREATE_SESSION_EXT: |
1014 | case LTTCOMM_SESSIOND_COMMAND_DESTROY_SESSION: | |
1015 | case LTTCOMM_SESSIOND_COMMAND_LIST_SESSIONS: | |
1016 | case LTTCOMM_SESSIOND_COMMAND_LIST_DOMAINS: | |
1017 | case LTTCOMM_SESSIOND_COMMAND_START_TRACE: | |
1018 | case LTTCOMM_SESSIOND_COMMAND_STOP_TRACE: | |
1019 | case LTTCOMM_SESSIOND_COMMAND_DATA_PENDING: | |
1020 | case LTTCOMM_SESSIOND_COMMAND_SNAPSHOT_ADD_OUTPUT: | |
1021 | case LTTCOMM_SESSIOND_COMMAND_SNAPSHOT_DEL_OUTPUT: | |
1022 | case LTTCOMM_SESSIOND_COMMAND_SNAPSHOT_LIST_OUTPUT: | |
1023 | case LTTCOMM_SESSIOND_COMMAND_SNAPSHOT_RECORD: | |
1024 | case LTTCOMM_SESSIOND_COMMAND_SAVE_SESSION: | |
1025 | case LTTCOMM_SESSIOND_COMMAND_SET_SESSION_SHM_PATH: | |
1026 | case LTTCOMM_SESSIOND_COMMAND_REGENERATE_METADATA: | |
1027 | case LTTCOMM_SESSIOND_COMMAND_REGENERATE_STATEDUMP: | |
1028 | case LTTCOMM_SESSIOND_COMMAND_ROTATE_SESSION: | |
1029 | case LTTCOMM_SESSIOND_COMMAND_ROTATION_GET_INFO: | |
1030 | case LTTCOMM_SESSIOND_COMMAND_ROTATION_SET_SCHEDULE: | |
1031 | case LTTCOMM_SESSIOND_COMMAND_SESSION_LIST_ROTATION_SCHEDULES: | |
1032 | case LTTCOMM_SESSIOND_COMMAND_CLEAR_SESSION: | |
1033 | case LTTCOMM_SESSIOND_COMMAND_LIST_TRIGGERS: | |
1034 | case LTTCOMM_SESSIOND_COMMAND_EXECUTE_ERROR_QUERY: | |
9124c630 JR |
1035 | need_domain = false; |
1036 | break; | |
1037 | default: | |
1038 | need_domain = true; | |
1039 | } | |
1040 | ||
1041 | /* Needs a functioning consumerd? */ | |
1042 | switch (cmd_ctx->lsm.cmd_type) { | |
37a5ef39 JG |
1043 | case LTTCOMM_SESSIOND_COMMAND_REGISTER_TRIGGER: |
1044 | case LTTCOMM_SESSIOND_COMMAND_UNREGISTER_TRIGGER: | |
1045 | case LTTCOMM_SESSIOND_COMMAND_EXECUTE_ERROR_QUERY: | |
9124c630 | 1046 | need_consumerd = false; |
917a718d JG |
1047 | break; |
1048 | default: | |
9124c630 JR |
1049 | need_consumerd = true; |
1050 | break; | |
917a718d JG |
1051 | } |
1052 | ||
412d7227 | 1053 | if (the_config.no_kernel && need_domain && |
28ab034a | 1054 | cmd_ctx->lsm.domain.type == LTTNG_DOMAIN_KERNEL) { |
917a718d JG |
1055 | if (!is_root) { |
1056 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; | |
1057 | } else { | |
1058 | ret = LTTNG_ERR_KERN_NA; | |
1059 | } | |
1060 | goto error; | |
1061 | } | |
1062 | ||
1063 | /* Deny register consumer if we already have a spawned consumer. */ | |
37a5ef39 | 1064 | if (cmd_ctx->lsm.cmd_type == LTTCOMM_SESSIOND_COMMAND_REGISTER_CONSUMER) { |
412d7227 SM |
1065 | pthread_mutex_lock(&the_kconsumer_data.pid_mutex); |
1066 | if (the_kconsumer_data.pid > 0) { | |
917a718d | 1067 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
412d7227 | 1068 | pthread_mutex_unlock(&the_kconsumer_data.pid_mutex); |
917a718d JG |
1069 | goto error; |
1070 | } | |
412d7227 | 1071 | pthread_mutex_unlock(&the_kconsumer_data.pid_mutex); |
917a718d JG |
1072 | } |
1073 | ||
1074 | /* | |
1075 | * Check for command that don't needs to allocate a returned payload. We do | |
1076 | * this here so we don't have to make the call for no payload at each | |
1077 | * command. | |
1078 | */ | |
28ab034a | 1079 | switch (cmd_ctx->lsm.cmd_type) { |
37a5ef39 JG |
1080 | case LTTCOMM_SESSIOND_COMMAND_LIST_SESSIONS: |
1081 | case LTTCOMM_SESSIOND_COMMAND_LIST_TRACEPOINTS: | |
1082 | case LTTCOMM_SESSIOND_COMMAND_LIST_TRACEPOINT_FIELDS: | |
1083 | case LTTCOMM_SESSIOND_COMMAND_LIST_DOMAINS: | |
1084 | case LTTCOMM_SESSIOND_COMMAND_LIST_CHANNELS: | |
1085 | case LTTCOMM_SESSIOND_COMMAND_LIST_EVENTS: | |
1086 | case LTTCOMM_SESSIOND_COMMAND_LIST_SYSCALLS: | |
1087 | case LTTCOMM_SESSIOND_COMMAND_SESSION_LIST_ROTATION_SCHEDULES: | |
1088 | case LTTCOMM_SESSIOND_COMMAND_PROCESS_ATTR_TRACKER_GET_POLICY: | |
1089 | case LTTCOMM_SESSIOND_COMMAND_PROCESS_ATTR_TRACKER_GET_INCLUSION_SET: | |
1090 | case LTTCOMM_SESSIOND_COMMAND_DATA_PENDING: | |
1091 | case LTTCOMM_SESSIOND_COMMAND_ROTATE_SESSION: | |
1092 | case LTTCOMM_SESSIOND_COMMAND_ROTATION_GET_INFO: | |
1093 | case LTTCOMM_SESSIOND_COMMAND_REGISTER_TRIGGER: | |
1094 | case LTTCOMM_SESSIOND_COMMAND_LIST_TRIGGERS: | |
1095 | case LTTCOMM_SESSIOND_COMMAND_EXECUTE_ERROR_QUERY: | |
917a718d JG |
1096 | break; |
1097 | default: | |
1098 | /* Setup lttng message with no payload */ | |
cd9adb8b | 1099 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, nullptr, 0); |
917a718d JG |
1100 | if (ret < 0) { |
1101 | /* This label does not try to unlock the session */ | |
1102 | goto init_setup_error; | |
1103 | } | |
1104 | } | |
1105 | ||
1106 | /* Commands that DO NOT need a session. */ | |
3a91de3a | 1107 | switch (cmd_ctx->lsm.cmd_type) { |
37a5ef39 JG |
1108 | case LTTCOMM_SESSIOND_COMMAND_CREATE_SESSION_EXT: |
1109 | case LTTCOMM_SESSIOND_COMMAND_LIST_SESSIONS: | |
1110 | case LTTCOMM_SESSIOND_COMMAND_LIST_TRACEPOINTS: | |
1111 | case LTTCOMM_SESSIOND_COMMAND_LIST_SYSCALLS: | |
1112 | case LTTCOMM_SESSIOND_COMMAND_LIST_TRACEPOINT_FIELDS: | |
1113 | case LTTCOMM_SESSIOND_COMMAND_SAVE_SESSION: | |
1114 | case LTTCOMM_SESSIOND_COMMAND_REGISTER_TRIGGER: | |
1115 | case LTTCOMM_SESSIOND_COMMAND_UNREGISTER_TRIGGER: | |
1116 | case LTTCOMM_SESSIOND_COMMAND_LIST_TRIGGERS: | |
1117 | case LTTCOMM_SESSIOND_COMMAND_EXECUTE_ERROR_QUERY: | |
9124c630 | 1118 | need_tracing_session = false; |
917a718d JG |
1119 | break; |
1120 | default: | |
3a91de3a | 1121 | DBG("Getting session %s by name", cmd_ctx->lsm.session.name); |
917a718d JG |
1122 | /* |
1123 | * We keep the session list lock across _all_ commands | |
1124 | * for now, because the per-session lock does not | |
1125 | * handle teardown properly. | |
1126 | */ | |
1127 | session_lock_list(); | |
3a91de3a | 1128 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm.session.name); |
cd9adb8b | 1129 | if (cmd_ctx->session == nullptr) { |
917a718d JG |
1130 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
1131 | goto error; | |
1132 | } else { | |
1133 | /* Acquire lock for the session */ | |
1134 | session_lock(cmd_ctx->session); | |
1135 | } | |
1136 | break; | |
1137 | } | |
1138 | ||
1139 | /* | |
1140 | * Commands that need a valid session but should NOT create one if none | |
1141 | * exists. Instead of creating one and destroying it when the command is | |
1142 | * handled, process that right before so we save some round trip in useless | |
1143 | * code path. | |
1144 | */ | |
3a91de3a | 1145 | switch (cmd_ctx->lsm.cmd_type) { |
37a5ef39 JG |
1146 | case LTTCOMM_SESSIOND_COMMAND_DISABLE_CHANNEL: |
1147 | case LTTCOMM_SESSIOND_COMMAND_DISABLE_EVENT: | |
3a91de3a | 1148 | switch (cmd_ctx->lsm.domain.type) { |
917a718d JG |
1149 | case LTTNG_DOMAIN_KERNEL: |
1150 | if (!cmd_ctx->session->kernel_session) { | |
1151 | ret = LTTNG_ERR_NO_CHANNEL; | |
1152 | goto error; | |
1153 | } | |
1154 | break; | |
1155 | case LTTNG_DOMAIN_JUL: | |
1156 | case LTTNG_DOMAIN_LOG4J: | |
1157 | case LTTNG_DOMAIN_PYTHON: | |
1158 | case LTTNG_DOMAIN_UST: | |
1159 | if (!cmd_ctx->session->ust_session) { | |
1160 | ret = LTTNG_ERR_NO_CHANNEL; | |
1161 | goto error; | |
1162 | } | |
1163 | break; | |
1164 | default: | |
1165 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1166 | goto error; | |
1167 | } | |
1168 | default: | |
1169 | break; | |
1170 | } | |
1171 | ||
1172 | if (!need_domain) { | |
1173 | goto skip_domain; | |
1174 | } | |
1175 | ||
1176 | /* | |
1177 | * Check domain type for specific "pre-action". | |
1178 | */ | |
3a91de3a | 1179 | switch (cmd_ctx->lsm.domain.type) { |
917a718d JG |
1180 | case LTTNG_DOMAIN_KERNEL: |
1181 | if (!is_root) { | |
1182 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; | |
1183 | goto error; | |
1184 | } | |
1185 | ||
7d268848 MD |
1186 | /* Kernel tracer check */ |
1187 | if (!kernel_tracer_is_initialized()) { | |
1188 | /* Basically, load kernel tracer modules */ | |
1189 | ret = init_kernel_tracer(); | |
1190 | if (ret != 0) { | |
1191 | goto error; | |
1192 | } | |
1193 | } | |
1194 | ||
917a718d | 1195 | /* Consumer is in an ERROR state. Report back to client */ |
28ab034a | 1196 | if (need_consumerd && uatomic_read(&the_kernel_consumerd_state) == CONSUMER_ERROR) { |
917a718d JG |
1197 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
1198 | goto error; | |
1199 | } | |
1200 | ||
1201 | /* Need a session for kernel command */ | |
1202 | if (need_tracing_session) { | |
cd9adb8b | 1203 | if (cmd_ctx->session->kernel_session == nullptr) { |
917a718d | 1204 | ret = create_kernel_session(cmd_ctx->session); |
51630bd8 | 1205 | if (ret != LTTNG_OK) { |
917a718d JG |
1206 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
1207 | goto error; | |
1208 | } | |
1209 | } | |
1210 | ||
1211 | /* Start the kernel consumer daemon */ | |
412d7227 SM |
1212 | pthread_mutex_lock(&the_kconsumer_data.pid_mutex); |
1213 | if (the_kconsumer_data.pid == 0 && | |
28ab034a | 1214 | cmd_ctx->lsm.cmd_type != LTTCOMM_SESSIOND_COMMAND_REGISTER_CONSUMER) { |
412d7227 SM |
1215 | pthread_mutex_unlock(&the_kconsumer_data.pid_mutex); |
1216 | ret = start_consumerd(&the_kconsumer_data); | |
917a718d JG |
1217 | if (ret < 0) { |
1218 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; | |
1219 | goto error; | |
1220 | } | |
412d7227 | 1221 | uatomic_set(&the_kernel_consumerd_state, CONSUMER_STARTED); |
917a718d | 1222 | } else { |
412d7227 | 1223 | pthread_mutex_unlock(&the_kconsumer_data.pid_mutex); |
917a718d JG |
1224 | } |
1225 | ||
1226 | /* | |
1227 | * The consumer was just spawned so we need to add the socket to | |
1228 | * the consumer output of the session if exist. | |
1229 | */ | |
412d7227 | 1230 | ret = consumer_create_socket(&the_kconsumer_data, |
28ab034a | 1231 | cmd_ctx->session->kernel_session->consumer); |
917a718d JG |
1232 | if (ret < 0) { |
1233 | goto error; | |
1234 | } | |
1235 | } | |
1236 | ||
1237 | break; | |
1238 | case LTTNG_DOMAIN_JUL: | |
1239 | case LTTNG_DOMAIN_LOG4J: | |
1240 | case LTTNG_DOMAIN_PYTHON: | |
44760c20 JR |
1241 | if (!agent_tracing_is_enabled()) { |
1242 | ret = LTTNG_ERR_AGENT_TRACING_DISABLED; | |
1243 | goto error; | |
1244 | } | |
1245 | /* Fallthrough */ | |
917a718d JG |
1246 | case LTTNG_DOMAIN_UST: |
1247 | { | |
1248 | if (!ust_app_supported()) { | |
1249 | ret = LTTNG_ERR_NO_UST; | |
1250 | goto error; | |
1251 | } | |
9124c630 | 1252 | |
917a718d | 1253 | /* Consumer is in an ERROR state. Report back to client */ |
28ab034a | 1254 | if (need_consumerd && uatomic_read(&the_ust_consumerd_state) == CONSUMER_ERROR) { |
917a718d JG |
1255 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
1256 | goto error; | |
1257 | } | |
1258 | ||
1259 | if (need_tracing_session) { | |
1260 | /* Create UST session if none exist. */ | |
cd9adb8b | 1261 | if (cmd_ctx->session->ust_session == nullptr) { |
7966af57 SM |
1262 | lttng_domain domain = cmd_ctx->lsm.domain; |
1263 | ret = create_ust_session(cmd_ctx->session, &domain); | |
917a718d JG |
1264 | if (ret != LTTNG_OK) { |
1265 | goto error; | |
1266 | } | |
1267 | } | |
1268 | ||
1269 | /* Start the UST consumer daemons */ | |
1270 | /* 64-bit */ | |
412d7227 SM |
1271 | pthread_mutex_lock(&the_ustconsumer64_data.pid_mutex); |
1272 | if (the_config.consumerd64_bin_path.value && | |
28ab034a JG |
1273 | the_ustconsumer64_data.pid == 0 && |
1274 | cmd_ctx->lsm.cmd_type != LTTCOMM_SESSIOND_COMMAND_REGISTER_CONSUMER) { | |
412d7227 SM |
1275 | pthread_mutex_unlock(&the_ustconsumer64_data.pid_mutex); |
1276 | ret = start_consumerd(&the_ustconsumer64_data); | |
917a718d JG |
1277 | if (ret < 0) { |
1278 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; | |
412d7227 | 1279 | uatomic_set(&the_ust_consumerd64_fd, -EINVAL); |
917a718d JG |
1280 | goto error; |
1281 | } | |
1282 | ||
28ab034a JG |
1283 | uatomic_set(&the_ust_consumerd64_fd, |
1284 | the_ustconsumer64_data.cmd_sock); | |
412d7227 | 1285 | uatomic_set(&the_ust_consumerd_state, CONSUMER_STARTED); |
917a718d | 1286 | } else { |
412d7227 | 1287 | pthread_mutex_unlock(&the_ustconsumer64_data.pid_mutex); |
917a718d JG |
1288 | } |
1289 | ||
1290 | /* | |
1291 | * Setup socket for consumer 64 bit. No need for atomic access | |
1292 | * since it was set above and can ONLY be set in this thread. | |
1293 | */ | |
412d7227 | 1294 | ret = consumer_create_socket(&the_ustconsumer64_data, |
28ab034a | 1295 | cmd_ctx->session->ust_session->consumer); |
917a718d JG |
1296 | if (ret < 0) { |
1297 | goto error; | |
1298 | } | |
1299 | ||
1300 | /* 32-bit */ | |
412d7227 SM |
1301 | pthread_mutex_lock(&the_ustconsumer32_data.pid_mutex); |
1302 | if (the_config.consumerd32_bin_path.value && | |
28ab034a JG |
1303 | the_ustconsumer32_data.pid == 0 && |
1304 | cmd_ctx->lsm.cmd_type != LTTCOMM_SESSIOND_COMMAND_REGISTER_CONSUMER) { | |
412d7227 SM |
1305 | pthread_mutex_unlock(&the_ustconsumer32_data.pid_mutex); |
1306 | ret = start_consumerd(&the_ustconsumer32_data); | |
917a718d JG |
1307 | if (ret < 0) { |
1308 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; | |
412d7227 | 1309 | uatomic_set(&the_ust_consumerd32_fd, -EINVAL); |
917a718d JG |
1310 | goto error; |
1311 | } | |
1312 | ||
28ab034a JG |
1313 | uatomic_set(&the_ust_consumerd32_fd, |
1314 | the_ustconsumer32_data.cmd_sock); | |
412d7227 | 1315 | uatomic_set(&the_ust_consumerd_state, CONSUMER_STARTED); |
917a718d | 1316 | } else { |
412d7227 | 1317 | pthread_mutex_unlock(&the_ustconsumer32_data.pid_mutex); |
917a718d JG |
1318 | } |
1319 | ||
1320 | /* | |
1321 | * Setup socket for consumer 32 bit. No need for atomic access | |
1322 | * since it was set above and can ONLY be set in this thread. | |
1323 | */ | |
412d7227 | 1324 | ret = consumer_create_socket(&the_ustconsumer32_data, |
28ab034a | 1325 | cmd_ctx->session->ust_session->consumer); |
917a718d JG |
1326 | if (ret < 0) { |
1327 | goto error; | |
1328 | } | |
1329 | } | |
1330 | break; | |
1331 | } | |
1332 | default: | |
1333 | break; | |
1334 | } | |
1335 | skip_domain: | |
1336 | ||
1337 | /* Validate consumer daemon state when start/stop trace command */ | |
37a5ef39 | 1338 | if (cmd_ctx->lsm.cmd_type == LTTCOMM_SESSIOND_COMMAND_START_TRACE || |
28ab034a | 1339 | cmd_ctx->lsm.cmd_type == LTTCOMM_SESSIOND_COMMAND_STOP_TRACE) { |
3a91de3a | 1340 | switch (cmd_ctx->lsm.domain.type) { |
917a718d JG |
1341 | case LTTNG_DOMAIN_NONE: |
1342 | break; | |
1343 | case LTTNG_DOMAIN_JUL: | |
1344 | case LTTNG_DOMAIN_LOG4J: | |
1345 | case LTTNG_DOMAIN_PYTHON: | |
1346 | case LTTNG_DOMAIN_UST: | |
412d7227 | 1347 | if (uatomic_read(&the_ust_consumerd_state) != CONSUMER_STARTED) { |
917a718d JG |
1348 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
1349 | goto error; | |
1350 | } | |
1351 | break; | |
1352 | case LTTNG_DOMAIN_KERNEL: | |
412d7227 | 1353 | if (uatomic_read(&the_kernel_consumerd_state) != CONSUMER_STARTED) { |
917a718d JG |
1354 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
1355 | goto error; | |
1356 | } | |
1357 | break; | |
1358 | default: | |
1359 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1360 | goto error; | |
1361 | } | |
1362 | } | |
1363 | ||
1364 | /* | |
d7b377ed | 1365 | * Check that the UID matches that of the tracing session. |
917a718d JG |
1366 | * The root user can interact with all sessions. |
1367 | */ | |
1368 | if (need_tracing_session) { | |
1369 | if (!session_access_ok(cmd_ctx->session, | |
28ab034a JG |
1370 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds)) || |
1371 | cmd_ctx->session->destroyed) { | |
917a718d JG |
1372 | ret = LTTNG_ERR_EPERM; |
1373 | goto error; | |
1374 | } | |
1375 | } | |
1376 | ||
1377 | /* | |
1378 | * Send relayd information to consumer as soon as we have a domain and a | |
1379 | * session defined. | |
1380 | */ | |
1381 | if (cmd_ctx->session && need_domain) { | |
1382 | /* | |
1383 | * Setup relayd if not done yet. If the relayd information was already | |
1384 | * sent to the consumer, this call will gracefully return. | |
1385 | */ | |
1386 | ret = cmd_setup_relayd(cmd_ctx->session); | |
1387 | if (ret != LTTNG_OK) { | |
1388 | goto error; | |
1389 | } | |
1390 | } | |
1391 | ||
1392 | /* Process by command type */ | |
3a91de3a | 1393 | switch (cmd_ctx->lsm.cmd_type) { |
37a5ef39 | 1394 | case LTTCOMM_SESSIOND_COMMAND_ADD_CONTEXT: |
917a718d | 1395 | { |
cd9adb8b | 1396 | struct lttng_event_context *event_context = nullptr; |
26e1c61f | 1397 | const enum lttng_error_code ret_code = |
28ab034a | 1398 | receive_lttng_event_context(cmd_ctx, *sock, sock_error, &event_context); |
917a718d | 1399 | |
26e1c61f JR |
1400 | if (ret_code != LTTNG_OK) { |
1401 | ret = (int) ret_code; | |
917a718d JG |
1402 | goto error; |
1403 | } | |
26e1c61f JR |
1404 | |
1405 | ret = cmd_add_context(cmd_ctx, event_context, the_kernel_poll_pipe[1]); | |
1406 | lttng_event_context_destroy(event_context); | |
917a718d JG |
1407 | break; |
1408 | } | |
37a5ef39 | 1409 | case LTTCOMM_SESSIOND_COMMAND_DISABLE_CHANNEL: |
917a718d | 1410 | { |
28ab034a JG |
1411 | ret = cmd_disable_channel(cmd_ctx->session, |
1412 | cmd_ctx->lsm.domain.type, | |
1413 | cmd_ctx->lsm.u.disable.channel_name); | |
917a718d JG |
1414 | break; |
1415 | } | |
37a5ef39 | 1416 | case LTTCOMM_SESSIOND_COMMAND_ENABLE_CHANNEL: |
917a718d | 1417 | { |
28ab034a | 1418 | ret = cmd_enable_channel(cmd_ctx, *sock, the_kernel_poll_pipe[1]); |
917a718d JG |
1419 | break; |
1420 | } | |
37a5ef39 JG |
1421 | case LTTCOMM_SESSIOND_COMMAND_PROCESS_ATTR_TRACKER_ADD_INCLUDE_VALUE: |
1422 | case LTTCOMM_SESSIOND_COMMAND_PROCESS_ATTR_TRACKER_REMOVE_INCLUDE_VALUE: | |
917a718d | 1423 | { |
159b042f JG |
1424 | struct lttng_dynamic_buffer payload; |
1425 | struct lttng_buffer_view payload_view; | |
28ab034a JG |
1426 | const bool add_value = cmd_ctx->lsm.cmd_type == |
1427 | LTTCOMM_SESSIOND_COMMAND_PROCESS_ATTR_TRACKER_ADD_INCLUDE_VALUE; | |
159b042f | 1428 | const size_t name_len = |
28ab034a | 1429 | cmd_ctx->lsm.u.process_attr_tracker_add_remove_include_value.name_len; |
159b042f | 1430 | const enum lttng_domain_type domain_type = |
28ab034a | 1431 | (enum lttng_domain_type) cmd_ctx->lsm.domain.type; |
159b042f | 1432 | const enum lttng_process_attr process_attr = |
28ab034a JG |
1433 | (enum lttng_process_attr) cmd_ctx->lsm.u |
1434 | .process_attr_tracker_add_remove_include_value.process_attr; | |
159b042f | 1435 | const enum lttng_process_attr_value_type value_type = |
28ab034a JG |
1436 | (enum lttng_process_attr_value_type) cmd_ctx->lsm.u |
1437 | .process_attr_tracker_add_remove_include_value.value_type; | |
159b042f JG |
1438 | struct process_attr_value *value; |
1439 | enum lttng_error_code ret_code; | |
1434fd36 MJ |
1440 | long login_name_max; |
1441 | ||
1442 | login_name_max = sysconf(_SC_LOGIN_NAME_MAX); | |
1443 | if (login_name_max < 0) { | |
1444 | PERROR("Failed to get _SC_LOGIN_NAME_MAX system configuration"); | |
1445 | ret = LTTNG_ERR_INVALID; | |
1446 | goto error; | |
1447 | } | |
159b042f JG |
1448 | |
1449 | /* Receive remaining variable length payload if applicable. */ | |
1434fd36 | 1450 | if (name_len > login_name_max) { |
159b042f JG |
1451 | /* |
1452 | * POSIX mandates user and group names that are at least | |
1453 | * 8 characters long. Note that although shadow-utils | |
1454 | * (useradd, groupaadd, etc.) use 32 chars as their | |
1455 | * limit (from bits/utmp.h, UT_NAMESIZE), | |
1456 | * LOGIN_NAME_MAX is defined to 256. | |
1457 | */ | |
1434fd36 | 1458 | ERR("Rejecting process attribute tracker value %s as the provided exceeds the maximal allowed length: argument length = %zu, maximal length = %ld", |
28ab034a JG |
1459 | add_value ? "addition" : "removal", |
1460 | name_len, | |
1461 | login_name_max); | |
159b042f | 1462 | ret = LTTNG_ERR_INVALID; |
2d97a006 JR |
1463 | goto error; |
1464 | } | |
1465 | ||
159b042f JG |
1466 | lttng_dynamic_buffer_init(&payload); |
1467 | if (name_len != 0) { | |
1468 | /* | |
1469 | * Receive variable payload for user/group name | |
1470 | * arguments. | |
1471 | */ | |
1472 | ret = lttng_dynamic_buffer_set_size(&payload, name_len); | |
1473 | if (ret) { | |
1474 | ERR("Failed to allocate buffer to receive payload of %s process attribute tracker value argument", | |
28ab034a | 1475 | add_value ? "add" : "remove"); |
55c9e7ca | 1476 | ret = LTTNG_ERR_NOMEM; |
159b042f | 1477 | goto error_add_remove_tracker_value; |
55c9e7ca | 1478 | } |
159b042f | 1479 | |
28ab034a | 1480 | ret = lttcomm_recv_unix_sock(*sock, payload.data, name_len); |
55c9e7ca | 1481 | if (ret <= 0) { |
159b042f | 1482 | ERR("Failed to receive payload of %s process attribute tracker value argument", |
28ab034a | 1483 | add_value ? "add" : "remove"); |
55c9e7ca | 1484 | *sock_error = 1; |
159b042f JG |
1485 | ret = LTTNG_ERR_INVALID_PROTOCOL; |
1486 | goto error_add_remove_tracker_value; | |
55c9e7ca | 1487 | } |
159b042f | 1488 | } |
2d97a006 | 1489 | |
28ab034a | 1490 | payload_view = lttng_buffer_view_from_dynamic_buffer(&payload, 0, name_len); |
3e6e0df2 JG |
1491 | if (name_len > 0 && !lttng_buffer_view_is_valid(&payload_view)) { |
1492 | ret = LTTNG_ERR_INVALID_PROTOCOL; | |
1493 | goto error_add_remove_tracker_value; | |
1494 | } | |
1495 | ||
159b042f JG |
1496 | /* |
1497 | * Validate the value type and domains are legal for the process | |
1498 | * attribute tracker that is specified and convert the value to | |
1499 | * add/remove to the internal sessiond representation. | |
1500 | */ | |
28ab034a JG |
1501 | ret_code = process_attr_value_from_comm( |
1502 | domain_type, | |
1503 | process_attr, | |
1504 | value_type, | |
1505 | &cmd_ctx->lsm.u.process_attr_tracker_add_remove_include_value.integral_value, | |
1506 | &payload_view, | |
1507 | &value); | |
159b042f JG |
1508 | if (ret_code != LTTNG_OK) { |
1509 | ret = ret_code; | |
1510 | goto error_add_remove_tracker_value; | |
55c9e7ca | 1511 | } |
159b042f JG |
1512 | |
1513 | if (add_value) { | |
1514 | ret = cmd_process_attr_tracker_inclusion_set_add_value( | |
28ab034a | 1515 | cmd_ctx->session, domain_type, process_attr, value); |
159b042f JG |
1516 | } else { |
1517 | ret = cmd_process_attr_tracker_inclusion_set_remove_value( | |
28ab034a | 1518 | cmd_ctx->session, domain_type, process_attr, value); |
159b042f JG |
1519 | } |
1520 | process_attr_value_destroy(value); | |
1521 | error_add_remove_tracker_value: | |
1522 | lttng_dynamic_buffer_reset(&payload); | |
1523 | break; | |
1524 | } | |
37a5ef39 | 1525 | case LTTCOMM_SESSIOND_COMMAND_PROCESS_ATTR_TRACKER_GET_POLICY: |
159b042f JG |
1526 | { |
1527 | enum lttng_tracking_policy tracking_policy; | |
1528 | const enum lttng_domain_type domain_type = | |
28ab034a | 1529 | (enum lttng_domain_type) cmd_ctx->lsm.domain.type; |
159b042f | 1530 | const enum lttng_process_attr process_attr = |
28ab034a JG |
1531 | (enum lttng_process_attr) cmd_ctx->lsm.u |
1532 | .process_attr_tracker_get_tracking_policy.process_attr; | |
159b042f JG |
1533 | |
1534 | ret = cmd_process_attr_tracker_get_tracking_policy( | |
28ab034a | 1535 | cmd_ctx->session, domain_type, process_attr, &tracking_policy); |
159b042f | 1536 | if (ret != LTTNG_OK) { |
55c9e7ca JR |
1537 | goto error; |
1538 | } | |
2d97a006 | 1539 | |
7966af57 | 1540 | uint32_t tracking_policy_u32 = tracking_policy; |
28ab034a JG |
1541 | ret = setup_lttng_msg_no_cmd_header( |
1542 | cmd_ctx, &tracking_policy_u32, sizeof(uint32_t)); | |
159b042f JG |
1543 | if (ret < 0) { |
1544 | ret = LTTNG_ERR_NOMEM; | |
2d97a006 JR |
1545 | goto error; |
1546 | } | |
159b042f | 1547 | ret = LTTNG_OK; |
917a718d JG |
1548 | break; |
1549 | } | |
37a5ef39 | 1550 | case LTTCOMM_SESSIOND_COMMAND_PROCESS_ATTR_TRACKER_SET_POLICY: |
917a718d | 1551 | { |
159b042f | 1552 | const enum lttng_tracking_policy tracking_policy = |
28ab034a JG |
1553 | (enum lttng_tracking_policy) cmd_ctx->lsm.u |
1554 | .process_attr_tracker_set_tracking_policy.tracking_policy; | |
159b042f | 1555 | const enum lttng_domain_type domain_type = |
28ab034a | 1556 | (enum lttng_domain_type) cmd_ctx->lsm.domain.type; |
159b042f | 1557 | const enum lttng_process_attr process_attr = |
28ab034a JG |
1558 | (enum lttng_process_attr) cmd_ctx->lsm.u |
1559 | .process_attr_tracker_set_tracking_policy.process_attr; | |
159b042f JG |
1560 | |
1561 | ret = cmd_process_attr_tracker_set_tracking_policy( | |
28ab034a | 1562 | cmd_ctx->session, domain_type, process_attr, tracking_policy); |
159b042f JG |
1563 | if (ret != LTTNG_OK) { |
1564 | goto error; | |
55c9e7ca | 1565 | } |
159b042f JG |
1566 | break; |
1567 | } | |
37a5ef39 | 1568 | case LTTCOMM_SESSIOND_COMMAND_PROCESS_ATTR_TRACKER_GET_INCLUSION_SET: |
159b042f JG |
1569 | { |
1570 | struct lttng_process_attr_values *values; | |
1571 | struct lttng_dynamic_buffer reply; | |
1572 | const enum lttng_domain_type domain_type = | |
28ab034a | 1573 | (enum lttng_domain_type) cmd_ctx->lsm.domain.type; |
159b042f | 1574 | const enum lttng_process_attr process_attr = |
28ab034a JG |
1575 | (enum lttng_process_attr) |
1576 | cmd_ctx->lsm.u.process_attr_tracker_get_inclusion_set.process_attr; | |
159b042f JG |
1577 | |
1578 | ret = cmd_process_attr_tracker_get_inclusion_set( | |
28ab034a | 1579 | cmd_ctx->session, domain_type, process_attr, &values); |
159b042f | 1580 | if (ret != LTTNG_OK) { |
55c9e7ca JR |
1581 | goto error; |
1582 | } | |
2d97a006 | 1583 | |
159b042f JG |
1584 | lttng_dynamic_buffer_init(&reply); |
1585 | ret = lttng_process_attr_values_serialize(values, &reply); | |
1586 | if (ret < 0) { | |
1587 | goto error_tracker_get_inclusion_set; | |
2d97a006 JR |
1588 | } |
1589 | ||
28ab034a | 1590 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, reply.data, reply.size); |
159b042f JG |
1591 | if (ret < 0) { |
1592 | ret = LTTNG_ERR_NOMEM; | |
1593 | goto error_tracker_get_inclusion_set; | |
1594 | } | |
1595 | ret = LTTNG_OK; | |
1596 | ||
1597 | error_tracker_get_inclusion_set: | |
1598 | lttng_process_attr_values_destroy(values); | |
1599 | lttng_dynamic_buffer_reset(&reply); | |
917a718d JG |
1600 | break; |
1601 | } | |
37a5ef39 JG |
1602 | case LTTCOMM_SESSIOND_COMMAND_ENABLE_EVENT: |
1603 | case LTTCOMM_SESSIOND_COMMAND_DISABLE_EVENT: | |
917a718d | 1604 | { |
8ddd72ef JR |
1605 | struct lttng_event *event; |
1606 | char *filter_expression; | |
1607 | struct lttng_event_exclusion *exclusions; | |
1608 | struct lttng_bytecode *bytecode; | |
28ab034a JG |
1609 | const enum lttng_error_code ret_code = receive_lttng_event(cmd_ctx, |
1610 | *sock, | |
1611 | sock_error, | |
1612 | &event, | |
1613 | &filter_expression, | |
1614 | &bytecode, | |
1615 | &exclusions); | |
917a718d | 1616 | |
8ddd72ef JR |
1617 | if (ret_code != LTTNG_OK) { |
1618 | ret = (int) ret_code; | |
917a718d JG |
1619 | goto error; |
1620 | } | |
1621 | ||
8ddd72ef JR |
1622 | /* |
1623 | * Ownership of filter_expression, exclusions, and bytecode is | |
1624 | * always transferred. | |
1625 | */ | |
37a5ef39 | 1626 | ret = cmd_ctx->lsm.cmd_type == LTTCOMM_SESSIOND_COMMAND_ENABLE_EVENT ? |
28ab034a JG |
1627 | cmd_enable_event(cmd_ctx, |
1628 | event, | |
1629 | filter_expression, | |
1630 | exclusions, | |
1631 | bytecode, | |
1632 | the_kernel_poll_pipe[1]) : | |
1633 | cmd_disable_event(cmd_ctx, event, filter_expression, bytecode, exclusions); | |
8ddd72ef | 1634 | lttng_event_destroy(event); |
917a718d JG |
1635 | break; |
1636 | } | |
37a5ef39 | 1637 | case LTTCOMM_SESSIOND_COMMAND_LIST_TRACEPOINTS: |
917a718d | 1638 | { |
8ddd72ef JR |
1639 | enum lttng_error_code ret_code; |
1640 | size_t original_payload_size; | |
1641 | size_t payload_size; | |
1642 | const size_t command_header_size = sizeof(struct lttcomm_list_command_header); | |
1643 | ||
1644 | ret = setup_empty_lttng_msg(cmd_ctx); | |
1645 | if (ret) { | |
1646 | ret = LTTNG_ERR_NOMEM; | |
1647 | goto setup_error; | |
1648 | } | |
1649 | ||
1650 | original_payload_size = cmd_ctx->reply_payload.buffer.size; | |
917a718d JG |
1651 | |
1652 | session_lock_list(); | |
28ab034a | 1653 | ret_code = cmd_list_tracepoints(cmd_ctx->lsm.domain.type, &cmd_ctx->reply_payload); |
917a718d | 1654 | session_unlock_list(); |
8ddd72ef JR |
1655 | if (ret_code != LTTNG_OK) { |
1656 | ret = (int) ret_code; | |
917a718d JG |
1657 | goto error; |
1658 | } | |
1659 | ||
28ab034a JG |
1660 | payload_size = cmd_ctx->reply_payload.buffer.size - command_header_size - |
1661 | original_payload_size; | |
8ddd72ef | 1662 | update_lttng_msg(cmd_ctx, command_header_size, payload_size); |
917a718d JG |
1663 | |
1664 | ret = LTTNG_OK; | |
1665 | break; | |
1666 | } | |
37a5ef39 | 1667 | case LTTCOMM_SESSIOND_COMMAND_LIST_TRACEPOINT_FIELDS: |
917a718d | 1668 | { |
b2d68839 JR |
1669 | enum lttng_error_code ret_code; |
1670 | size_t original_payload_size; | |
1671 | size_t payload_size; | |
1672 | const size_t command_header_size = sizeof(struct lttcomm_list_command_header); | |
1673 | ||
1674 | ret = setup_empty_lttng_msg(cmd_ctx); | |
1675 | if (ret) { | |
1676 | ret = LTTNG_ERR_NOMEM; | |
1677 | goto setup_error; | |
1678 | } | |
1679 | ||
1680 | original_payload_size = cmd_ctx->reply_payload.buffer.size; | |
917a718d JG |
1681 | |
1682 | session_lock_list(); | |
28ab034a JG |
1683 | ret_code = cmd_list_tracepoint_fields(cmd_ctx->lsm.domain.type, |
1684 | &cmd_ctx->reply_payload); | |
917a718d | 1685 | session_unlock_list(); |
b2d68839 JR |
1686 | if (ret_code != LTTNG_OK) { |
1687 | ret = (int) ret_code; | |
917a718d JG |
1688 | goto error; |
1689 | } | |
1690 | ||
28ab034a JG |
1691 | payload_size = cmd_ctx->reply_payload.buffer.size - command_header_size - |
1692 | original_payload_size; | |
b2d68839 | 1693 | update_lttng_msg(cmd_ctx, command_header_size, payload_size); |
917a718d JG |
1694 | |
1695 | ret = LTTNG_OK; | |
1696 | break; | |
1697 | } | |
37a5ef39 | 1698 | case LTTCOMM_SESSIOND_COMMAND_LIST_SYSCALLS: |
917a718d | 1699 | { |
8ddd72ef JR |
1700 | enum lttng_error_code ret_code; |
1701 | size_t original_payload_size; | |
1702 | size_t payload_size; | |
1703 | const size_t command_header_size = sizeof(struct lttcomm_list_command_header); | |
917a718d | 1704 | |
8ddd72ef JR |
1705 | ret = setup_empty_lttng_msg(cmd_ctx); |
1706 | if (ret) { | |
1707 | ret = LTTNG_ERR_NOMEM; | |
1708 | goto setup_error; | |
917a718d JG |
1709 | } |
1710 | ||
8ddd72ef | 1711 | original_payload_size = cmd_ctx->reply_payload.buffer.size; |
917a718d | 1712 | |
8ddd72ef JR |
1713 | ret_code = cmd_list_syscalls(&cmd_ctx->reply_payload); |
1714 | if (ret_code != LTTNG_OK) { | |
1715 | ret = (int) ret_code; | |
1716 | goto error; | |
917a718d JG |
1717 | } |
1718 | ||
28ab034a JG |
1719 | payload_size = cmd_ctx->reply_payload.buffer.size - command_header_size - |
1720 | original_payload_size; | |
8ddd72ef JR |
1721 | update_lttng_msg(cmd_ctx, command_header_size, payload_size); |
1722 | ||
917a718d JG |
1723 | ret = LTTNG_OK; |
1724 | break; | |
1725 | } | |
37a5ef39 | 1726 | case LTTCOMM_SESSIOND_COMMAND_SET_CONSUMER_URI: |
917a718d JG |
1727 | { |
1728 | size_t nb_uri, len; | |
1729 | struct lttng_uri *uris; | |
1730 | ||
3a91de3a | 1731 | nb_uri = cmd_ctx->lsm.u.uri.size; |
917a718d JG |
1732 | len = nb_uri * sizeof(struct lttng_uri); |
1733 | ||
1734 | if (nb_uri == 0) { | |
1735 | ret = LTTNG_ERR_INVALID; | |
1736 | goto error; | |
1737 | } | |
1738 | ||
64803277 | 1739 | uris = calloc<lttng_uri>(nb_uri); |
cd9adb8b | 1740 | if (uris == nullptr) { |
917a718d JG |
1741 | ret = LTTNG_ERR_FATAL; |
1742 | goto error; | |
1743 | } | |
1744 | ||
1745 | /* Receive variable len data */ | |
1746 | DBG("Receiving %zu URI(s) from client ...", nb_uri); | |
3e3665b8 | 1747 | ret = lttcomm_recv_unix_sock(*sock, uris, len); |
917a718d JG |
1748 | if (ret <= 0) { |
1749 | DBG("No URIs received from client... continuing"); | |
1750 | *sock_error = 1; | |
1751 | ret = LTTNG_ERR_SESSION_FAIL; | |
1752 | free(uris); | |
1753 | goto error; | |
1754 | } | |
1755 | ||
1756 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); | |
1757 | free(uris); | |
1758 | if (ret != LTTNG_OK) { | |
1759 | goto error; | |
1760 | } | |
1761 | ||
917a718d JG |
1762 | break; |
1763 | } | |
37a5ef39 | 1764 | case LTTCOMM_SESSIOND_COMMAND_START_TRACE: |
917a718d JG |
1765 | { |
1766 | /* | |
1767 | * On the first start, if we have a kernel session and we have | |
1768 | * enabled time or size-based rotations, we have to make sure | |
1769 | * the kernel tracer supports it. | |
1770 | */ | |
28ab034a JG |
1771 | if (!cmd_ctx->session->has_been_started && cmd_ctx->session->kernel_session && |
1772 | (cmd_ctx->session->rotate_timer_period || cmd_ctx->session->rotate_size) && | |
1773 | !check_rotate_compatible()) { | |
917a718d JG |
1774 | DBG("Kernel tracer version is not compatible with the rotation feature"); |
1775 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
1776 | goto error; | |
1777 | } | |
1778 | ret = cmd_start_trace(cmd_ctx->session); | |
1779 | break; | |
1780 | } | |
37a5ef39 | 1781 | case LTTCOMM_SESSIOND_COMMAND_STOP_TRACE: |
917a718d JG |
1782 | { |
1783 | ret = cmd_stop_trace(cmd_ctx->session); | |
1784 | break; | |
1785 | } | |
37a5ef39 | 1786 | case LTTCOMM_SESSIOND_COMMAND_DESTROY_SESSION: |
917a718d | 1787 | { |
0038180d | 1788 | ret = cmd_destroy_session(cmd_ctx->session, sock); |
917a718d JG |
1789 | break; |
1790 | } | |
37a5ef39 | 1791 | case LTTCOMM_SESSIOND_COMMAND_LIST_DOMAINS: |
917a718d JG |
1792 | { |
1793 | ssize_t nb_dom; | |
cd9adb8b | 1794 | struct lttng_domain *domains = nullptr; |
917a718d JG |
1795 | |
1796 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); | |
1797 | if (nb_dom < 0) { | |
1798 | /* Return value is a negative lttng_error_code. */ | |
1799 | ret = -nb_dom; | |
1800 | goto error; | |
1801 | } | |
1802 | ||
28ab034a JG |
1803 | ret = setup_lttng_msg_no_cmd_header( |
1804 | cmd_ctx, domains, nb_dom * sizeof(struct lttng_domain)); | |
917a718d JG |
1805 | free(domains); |
1806 | ||
1807 | if (ret < 0) { | |
1808 | goto setup_error; | |
1809 | } | |
1810 | ||
1811 | ret = LTTNG_OK; | |
1812 | break; | |
1813 | } | |
37a5ef39 | 1814 | case LTTCOMM_SESSIOND_COMMAND_LIST_CHANNELS: |
917a718d | 1815 | { |
999af9c1 JR |
1816 | enum lttng_error_code ret_code; |
1817 | size_t original_payload_size; | |
1818 | size_t payload_size; | |
1819 | const size_t command_header_size = sizeof(struct lttcomm_list_command_header); | |
917a718d | 1820 | |
999af9c1 JR |
1821 | ret = setup_empty_lttng_msg(cmd_ctx); |
1822 | if (ret) { | |
1823 | ret = LTTNG_ERR_NOMEM; | |
1824 | goto setup_error; | |
917a718d JG |
1825 | } |
1826 | ||
999af9c1 | 1827 | original_payload_size = cmd_ctx->reply_payload.buffer.size; |
917a718d | 1828 | |
28ab034a JG |
1829 | ret_code = cmd_list_channels( |
1830 | cmd_ctx->lsm.domain.type, cmd_ctx->session, &cmd_ctx->reply_payload); | |
999af9c1 JR |
1831 | if (ret_code != LTTNG_OK) { |
1832 | ret = (int) ret_code; | |
1833 | goto error; | |
917a718d JG |
1834 | } |
1835 | ||
28ab034a JG |
1836 | payload_size = cmd_ctx->reply_payload.buffer.size - command_header_size - |
1837 | original_payload_size; | |
999af9c1 JR |
1838 | update_lttng_msg(cmd_ctx, command_header_size, payload_size); |
1839 | ||
917a718d JG |
1840 | ret = LTTNG_OK; |
1841 | break; | |
1842 | } | |
37a5ef39 | 1843 | case LTTCOMM_SESSIOND_COMMAND_LIST_EVENTS: |
917a718d | 1844 | { |
8ddd72ef | 1845 | enum lttng_error_code ret_code; |
e368fb43 JG |
1846 | size_t original_payload_size; |
1847 | size_t payload_size; | |
8ddd72ef | 1848 | const size_t command_header_size = sizeof(struct lttcomm_list_command_header); |
e368fb43 JG |
1849 | |
1850 | ret = setup_empty_lttng_msg(cmd_ctx); | |
1851 | if (ret) { | |
1852 | ret = LTTNG_ERR_NOMEM; | |
1853 | goto setup_error; | |
917a718d JG |
1854 | } |
1855 | ||
e368fb43 | 1856 | original_payload_size = cmd_ctx->reply_payload.buffer.size; |
917a718d | 1857 | |
8ddd72ef | 1858 | ret_code = cmd_list_events(cmd_ctx->lsm.domain.type, |
28ab034a JG |
1859 | cmd_ctx->session, |
1860 | cmd_ctx->lsm.u.list.channel_name, | |
1861 | &cmd_ctx->reply_payload); | |
8ddd72ef JR |
1862 | if (ret_code != LTTNG_OK) { |
1863 | ret = (int) ret_code; | |
e368fb43 | 1864 | goto error; |
917a718d JG |
1865 | } |
1866 | ||
28ab034a JG |
1867 | payload_size = cmd_ctx->reply_payload.buffer.size - command_header_size - |
1868 | original_payload_size; | |
8ddd72ef | 1869 | update_lttng_msg(cmd_ctx, command_header_size, payload_size); |
e368fb43 | 1870 | |
917a718d JG |
1871 | ret = LTTNG_OK; |
1872 | break; | |
1873 | } | |
37a5ef39 | 1874 | case LTTCOMM_SESSIOND_COMMAND_LIST_SESSIONS: |
917a718d JG |
1875 | { |
1876 | unsigned int nr_sessions; | |
64803277 SM |
1877 | lttng_session *sessions_payload = nullptr; |
1878 | size_t payload_len = 0; | |
917a718d JG |
1879 | |
1880 | session_lock_list(); | |
28ab034a JG |
1881 | nr_sessions = lttng_sessions_count(LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
1882 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
b178f53e | 1883 | |
64803277 | 1884 | if (nr_sessions > 0) { |
28ab034a JG |
1885 | payload_len = (sizeof(struct lttng_session) * nr_sessions) + |
1886 | (sizeof(struct lttng_session_extended) * nr_sessions); | |
64803277 SM |
1887 | sessions_payload = zmalloc<lttng_session>(payload_len); |
1888 | if (!sessions_payload) { | |
1889 | session_unlock_list(); | |
1890 | ret = -ENOMEM; | |
1891 | goto setup_error; | |
1892 | } | |
917a718d | 1893 | |
28ab034a JG |
1894 | cmd_list_lttng_sessions(sessions_payload, |
1895 | nr_sessions, | |
1896 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
1897 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
917a718d JG |
1898 | } |
1899 | ||
917a718d JG |
1900 | session_unlock_list(); |
1901 | ||
28ab034a | 1902 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, sessions_payload, payload_len); |
917a718d JG |
1903 | free(sessions_payload); |
1904 | ||
1905 | if (ret < 0) { | |
1906 | goto setup_error; | |
1907 | } | |
1908 | ||
1909 | ret = LTTNG_OK; | |
1910 | break; | |
1911 | } | |
37a5ef39 | 1912 | case LTTCOMM_SESSIOND_COMMAND_REGISTER_CONSUMER: |
917a718d JG |
1913 | { |
1914 | struct consumer_data *cdata; | |
1915 | ||
3a91de3a | 1916 | switch (cmd_ctx->lsm.domain.type) { |
917a718d | 1917 | case LTTNG_DOMAIN_KERNEL: |
412d7227 | 1918 | cdata = &the_kconsumer_data; |
917a718d JG |
1919 | break; |
1920 | default: | |
1921 | ret = LTTNG_ERR_UND; | |
1922 | goto error; | |
1923 | } | |
1924 | ||
28ab034a JG |
1925 | ret = cmd_register_consumer( |
1926 | cmd_ctx->session, cmd_ctx->lsm.domain.type, cmd_ctx->lsm.u.reg.path, cdata); | |
917a718d JG |
1927 | break; |
1928 | } | |
37a5ef39 | 1929 | case LTTCOMM_SESSIOND_COMMAND_DATA_PENDING: |
917a718d JG |
1930 | { |
1931 | int pending_ret; | |
1932 | uint8_t pending_ret_byte; | |
1933 | ||
1934 | pending_ret = cmd_data_pending(cmd_ctx->session); | |
1935 | ||
1936 | /* | |
1937 | * FIXME | |
1938 | * | |
1939 | * This function may returns 0 or 1 to indicate whether or not | |
1940 | * there is data pending. In case of error, it should return an | |
1941 | * LTTNG_ERR code. However, some code paths may still return | |
1942 | * a nondescript error code, which we handle by returning an | |
1943 | * "unknown" error. | |
1944 | */ | |
1945 | if (pending_ret == 0 || pending_ret == 1) { | |
1946 | /* | |
1947 | * ret will be set to LTTNG_OK at the end of | |
1948 | * this function. | |
1949 | */ | |
1950 | } else if (pending_ret < 0) { | |
1951 | ret = LTTNG_ERR_UNK; | |
1952 | goto setup_error; | |
1953 | } else { | |
1954 | ret = pending_ret; | |
1955 | goto setup_error; | |
1956 | } | |
1957 | ||
1958 | pending_ret_byte = (uint8_t) pending_ret; | |
1959 | ||
1960 | /* 1 byte to return whether or not data is pending */ | |
28ab034a | 1961 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &pending_ret_byte, 1); |
917a718d JG |
1962 | |
1963 | if (ret < 0) { | |
1964 | goto setup_error; | |
1965 | } | |
1966 | ||
1967 | ret = LTTNG_OK; | |
1968 | break; | |
1969 | } | |
37a5ef39 | 1970 | case LTTCOMM_SESSIOND_COMMAND_SNAPSHOT_ADD_OUTPUT: |
917a718d | 1971 | { |
a914e76a | 1972 | uint32_t snapshot_id; |
917a718d | 1973 | struct lttcomm_lttng_output_id reply; |
7966af57 | 1974 | lttng_snapshot_output output = cmd_ctx->lsm.u.snapshot_output.output; |
917a718d | 1975 | |
28ab034a | 1976 | ret = cmd_snapshot_add_output(cmd_ctx->session, &output, &snapshot_id); |
917a718d JG |
1977 | if (ret != LTTNG_OK) { |
1978 | goto error; | |
1979 | } | |
a914e76a | 1980 | reply.id = snapshot_id; |
917a718d | 1981 | |
28ab034a | 1982 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &reply, sizeof(reply)); |
917a718d JG |
1983 | if (ret < 0) { |
1984 | goto setup_error; | |
1985 | } | |
1986 | ||
1987 | /* Copy output list into message payload */ | |
1988 | ret = LTTNG_OK; | |
1989 | break; | |
1990 | } | |
37a5ef39 | 1991 | case LTTCOMM_SESSIOND_COMMAND_SNAPSHOT_DEL_OUTPUT: |
917a718d | 1992 | { |
7966af57 SM |
1993 | lttng_snapshot_output output = cmd_ctx->lsm.u.snapshot_output.output; |
1994 | ret = cmd_snapshot_del_output(cmd_ctx->session, &output); | |
917a718d JG |
1995 | break; |
1996 | } | |
37a5ef39 | 1997 | case LTTCOMM_SESSIOND_COMMAND_SNAPSHOT_LIST_OUTPUT: |
917a718d JG |
1998 | { |
1999 | ssize_t nb_output; | |
cd9adb8b | 2000 | struct lttng_snapshot_output *outputs = nullptr; |
917a718d JG |
2001 | |
2002 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
2003 | if (nb_output < 0) { | |
2004 | ret = -nb_output; | |
2005 | goto error; | |
2006 | } | |
2007 | ||
a0377dfe | 2008 | LTTNG_ASSERT((nb_output > 0 && outputs) || nb_output == 0); |
28ab034a JG |
2009 | ret = setup_lttng_msg_no_cmd_header( |
2010 | cmd_ctx, outputs, nb_output * sizeof(struct lttng_snapshot_output)); | |
917a718d JG |
2011 | free(outputs); |
2012 | ||
2013 | if (ret < 0) { | |
2014 | goto setup_error; | |
2015 | } | |
2016 | ||
2017 | ret = LTTNG_OK; | |
2018 | break; | |
2019 | } | |
37a5ef39 | 2020 | case LTTCOMM_SESSIOND_COMMAND_SNAPSHOT_RECORD: |
917a718d | 2021 | { |
7966af57 | 2022 | lttng_snapshot_output output = cmd_ctx->lsm.u.snapshot_record.output; |
28ab034a JG |
2023 | ret = cmd_snapshot_record(cmd_ctx->session, &output, 0); // RFC: set to zero since |
2024 | // it's ignored by | |
2025 | // cmd_snapshot_record | |
917a718d JG |
2026 | break; |
2027 | } | |
37a5ef39 | 2028 | case LTTCOMM_SESSIOND_COMMAND_CREATE_SESSION_EXT: |
917a718d | 2029 | { |
b178f53e | 2030 | struct lttng_dynamic_buffer payload; |
cd9adb8b | 2031 | struct lttng_session_descriptor *return_descriptor = nullptr; |
917a718d | 2032 | |
b178f53e | 2033 | lttng_dynamic_buffer_init(&payload); |
3e3665b8 | 2034 | ret = cmd_create_session(cmd_ctx, *sock, &return_descriptor); |
b178f53e JG |
2035 | if (ret != LTTNG_OK) { |
2036 | goto error; | |
917a718d JG |
2037 | } |
2038 | ||
28ab034a | 2039 | ret = lttng_session_descriptor_serialize(return_descriptor, &payload); |
b178f53e JG |
2040 | if (ret) { |
2041 | ERR("Failed to serialize session descriptor in reply to \"create session\" command"); | |
2042 | lttng_session_descriptor_destroy(return_descriptor); | |
2043 | ret = LTTNG_ERR_NOMEM; | |
2044 | goto error; | |
917a718d | 2045 | } |
28ab034a | 2046 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, payload.data, payload.size); |
b178f53e JG |
2047 | if (ret) { |
2048 | lttng_session_descriptor_destroy(return_descriptor); | |
2049 | ret = LTTNG_ERR_NOMEM; | |
2050 | goto error; | |
2051 | } | |
2052 | lttng_dynamic_buffer_reset(&payload); | |
2053 | lttng_session_descriptor_destroy(return_descriptor); | |
2054 | ret = LTTNG_OK; | |
917a718d JG |
2055 | break; |
2056 | } | |
37a5ef39 | 2057 | case LTTCOMM_SESSIOND_COMMAND_SAVE_SESSION: |
917a718d | 2058 | { |
28ab034a | 2059 | ret = cmd_save_sessions(&cmd_ctx->lsm.u.save_session.attr, &cmd_ctx->creds); |
917a718d JG |
2060 | break; |
2061 | } | |
37a5ef39 | 2062 | case LTTCOMM_SESSIOND_COMMAND_SET_SESSION_SHM_PATH: |
917a718d JG |
2063 | { |
2064 | ret = cmd_set_session_shm_path(cmd_ctx->session, | |
28ab034a | 2065 | cmd_ctx->lsm.u.set_shm_path.shm_path); |
917a718d JG |
2066 | break; |
2067 | } | |
37a5ef39 | 2068 | case LTTCOMM_SESSIOND_COMMAND_REGENERATE_METADATA: |
917a718d JG |
2069 | { |
2070 | ret = cmd_regenerate_metadata(cmd_ctx->session); | |
2071 | break; | |
2072 | } | |
37a5ef39 | 2073 | case LTTCOMM_SESSIOND_COMMAND_REGENERATE_STATEDUMP: |
917a718d JG |
2074 | { |
2075 | ret = cmd_regenerate_statedump(cmd_ctx->session); | |
2076 | break; | |
2077 | } | |
37a5ef39 | 2078 | case LTTCOMM_SESSIOND_COMMAND_REGISTER_TRIGGER: |
917a718d | 2079 | { |
746e08d7 | 2080 | struct lttng_trigger *payload_trigger; |
242388e4 | 2081 | struct lttng_trigger *return_trigger; |
746e08d7 JG |
2082 | size_t original_reply_payload_size; |
2083 | size_t reply_payload_size; | |
2084 | const struct lttng_credentials cmd_creds = { | |
2085 | .uid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.uid), | |
2086 | .gid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.gid), | |
2087 | }; | |
242388e4 JR |
2088 | |
2089 | ret = setup_empty_lttng_msg(cmd_ctx); | |
2090 | if (ret) { | |
2091 | ret = LTTNG_ERR_NOMEM; | |
2092 | goto setup_error; | |
2093 | } | |
2094 | ||
28ab034a | 2095 | ret = receive_lttng_trigger(cmd_ctx, *sock, sock_error, &payload_trigger); |
746e08d7 JG |
2096 | if (ret != LTTNG_OK) { |
2097 | goto error; | |
2098 | } | |
2099 | ||
2100 | original_reply_payload_size = cmd_ctx->reply_payload.buffer.size; | |
242388e4 | 2101 | |
28ab034a JG |
2102 | ret = cmd_register_trigger(&cmd_creds, |
2103 | payload_trigger, | |
2104 | cmd_ctx->lsm.u.trigger.is_trigger_anonymous, | |
2105 | the_notification_thread_handle, | |
2106 | &return_trigger); | |
242388e4 | 2107 | if (ret != LTTNG_OK) { |
746e08d7 | 2108 | lttng_trigger_put(payload_trigger); |
242388e4 JR |
2109 | goto error; |
2110 | } | |
2111 | ||
2112 | ret = lttng_trigger_serialize(return_trigger, &cmd_ctx->reply_payload); | |
746e08d7 JG |
2113 | lttng_trigger_put(payload_trigger); |
2114 | lttng_trigger_put(return_trigger); | |
242388e4 JR |
2115 | if (ret) { |
2116 | ERR("Failed to serialize trigger in reply to \"register trigger\" command"); | |
2117 | ret = LTTNG_ERR_NOMEM; | |
242388e4 JR |
2118 | goto error; |
2119 | } | |
2120 | ||
28ab034a JG |
2121 | reply_payload_size = |
2122 | cmd_ctx->reply_payload.buffer.size - original_reply_payload_size; | |
242388e4 | 2123 | |
746e08d7 | 2124 | update_lttng_msg(cmd_ctx, 0, reply_payload_size); |
242388e4 JR |
2125 | |
2126 | ret = LTTNG_OK; | |
917a718d JG |
2127 | break; |
2128 | } | |
37a5ef39 | 2129 | case LTTCOMM_SESSIOND_COMMAND_UNREGISTER_TRIGGER: |
917a718d | 2130 | { |
746e08d7 JG |
2131 | struct lttng_trigger *payload_trigger; |
2132 | const struct lttng_credentials cmd_creds = { | |
2133 | .uid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.uid), | |
2134 | .gid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.gid), | |
2135 | }; | |
2136 | ||
28ab034a | 2137 | ret = receive_lttng_trigger(cmd_ctx, *sock, sock_error, &payload_trigger); |
746e08d7 JG |
2138 | if (ret != LTTNG_OK) { |
2139 | goto error; | |
2140 | } | |
2141 | ||
28ab034a JG |
2142 | ret = cmd_unregister_trigger( |
2143 | &cmd_creds, payload_trigger, the_notification_thread_handle); | |
746e08d7 | 2144 | lttng_trigger_put(payload_trigger); |
917a718d JG |
2145 | break; |
2146 | } | |
37a5ef39 | 2147 | case LTTCOMM_SESSIOND_COMMAND_ROTATE_SESSION: |
917a718d JG |
2148 | { |
2149 | struct lttng_rotate_session_return rotate_return; | |
2150 | ||
2151 | DBG("Client rotate session \"%s\"", cmd_ctx->session->name); | |
2152 | ||
2153 | memset(&rotate_return, 0, sizeof(rotate_return)); | |
2154 | if (cmd_ctx->session->kernel_session && !check_rotate_compatible()) { | |
2155 | DBG("Kernel tracer version is not compatible with the rotation feature"); | |
2156 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
2157 | goto error; | |
2158 | } | |
2159 | ||
28ab034a JG |
2160 | ret = cmd_rotate_session(cmd_ctx->session, |
2161 | &rotate_return, | |
2162 | false, | |
2163 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED); | |
917a718d JG |
2164 | if (ret < 0) { |
2165 | ret = -ret; | |
2166 | goto error; | |
2167 | } | |
2168 | ||
28ab034a | 2169 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &rotate_return, sizeof(rotate_return)); |
917a718d JG |
2170 | if (ret < 0) { |
2171 | ret = -ret; | |
2172 | goto error; | |
2173 | } | |
2174 | ||
2175 | ret = LTTNG_OK; | |
2176 | break; | |
2177 | } | |
37a5ef39 | 2178 | case LTTCOMM_SESSIOND_COMMAND_ROTATION_GET_INFO: |
917a718d JG |
2179 | { |
2180 | struct lttng_rotation_get_info_return get_info_return; | |
2181 | ||
2182 | memset(&get_info_return, 0, sizeof(get_info_return)); | |
28ab034a JG |
2183 | ret = cmd_rotate_get_info(cmd_ctx->session, |
2184 | &get_info_return, | |
2185 | cmd_ctx->lsm.u.get_rotation_info.rotation_id); | |
917a718d JG |
2186 | if (ret < 0) { |
2187 | ret = -ret; | |
2188 | goto error; | |
2189 | } | |
2190 | ||
28ab034a JG |
2191 | ret = setup_lttng_msg_no_cmd_header( |
2192 | cmd_ctx, &get_info_return, sizeof(get_info_return)); | |
917a718d JG |
2193 | if (ret < 0) { |
2194 | ret = -ret; | |
2195 | goto error; | |
2196 | } | |
2197 | ||
2198 | ret = LTTNG_OK; | |
2199 | break; | |
2200 | } | |
37a5ef39 | 2201 | case LTTCOMM_SESSIOND_COMMAND_ROTATION_SET_SCHEDULE: |
917a718d JG |
2202 | { |
2203 | bool set_schedule; | |
2204 | enum lttng_rotation_schedule_type schedule_type; | |
2205 | uint64_t value; | |
2206 | ||
2207 | if (cmd_ctx->session->kernel_session && !check_rotate_compatible()) { | |
2208 | DBG("Kernel tracer version does not support session rotations"); | |
2209 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
2210 | goto error; | |
2211 | } | |
2212 | ||
3a91de3a | 2213 | set_schedule = cmd_ctx->lsm.u.rotation_set_schedule.set == 1; |
28ab034a JG |
2214 | schedule_type = (enum lttng_rotation_schedule_type) |
2215 | cmd_ctx->lsm.u.rotation_set_schedule.type; | |
3a91de3a | 2216 | value = cmd_ctx->lsm.u.rotation_set_schedule.value; |
917a718d | 2217 | |
28f23191 JG |
2218 | ret = cmd_rotation_set_schedule( |
2219 | cmd_ctx->session, set_schedule, schedule_type, value); | |
917a718d JG |
2220 | if (ret != LTTNG_OK) { |
2221 | goto error; | |
2222 | } | |
2223 | ||
2224 | break; | |
2225 | } | |
37a5ef39 | 2226 | case LTTCOMM_SESSIOND_COMMAND_SESSION_LIST_ROTATION_SCHEDULES: |
917a718d | 2227 | { |
7966af57 SM |
2228 | lttng_session_list_schedules_return schedules; |
2229 | ||
2230 | schedules.periodic.set = !!cmd_ctx->session->rotate_timer_period; | |
2231 | schedules.periodic.value = cmd_ctx->session->rotate_timer_period; | |
2232 | schedules.size.set = !!cmd_ctx->session->rotate_size; | |
2233 | schedules.size.value = cmd_ctx->session->rotate_size; | |
917a718d | 2234 | |
28ab034a | 2235 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &schedules, sizeof(schedules)); |
917a718d JG |
2236 | if (ret < 0) { |
2237 | ret = -ret; | |
2238 | goto error; | |
2239 | } | |
2240 | ||
2241 | ret = LTTNG_OK; | |
2242 | break; | |
2243 | } | |
37a5ef39 | 2244 | case LTTCOMM_SESSIOND_COMMAND_CLEAR_SESSION: |
022349df MD |
2245 | { |
2246 | ret = cmd_clear_session(cmd_ctx->session, sock); | |
2247 | break; | |
2248 | } | |
37a5ef39 | 2249 | case LTTCOMM_SESSIOND_COMMAND_LIST_TRIGGERS: |
fbc9f37d | 2250 | { |
cd9adb8b | 2251 | struct lttng_triggers *return_triggers = nullptr; |
fbc9f37d JR |
2252 | size_t original_payload_size; |
2253 | size_t payload_size; | |
2254 | ||
2255 | ret = setup_empty_lttng_msg(cmd_ctx); | |
2256 | if (ret) { | |
2257 | ret = LTTNG_ERR_NOMEM; | |
2258 | goto setup_error; | |
2259 | } | |
2260 | ||
2261 | original_payload_size = cmd_ctx->reply_payload.buffer.size; | |
2262 | ||
28ab034a | 2263 | ret = cmd_list_triggers(cmd_ctx, the_notification_thread_handle, &return_triggers); |
fbc9f37d JR |
2264 | if (ret != LTTNG_OK) { |
2265 | goto error; | |
2266 | } | |
2267 | ||
a0377dfe | 2268 | LTTNG_ASSERT(return_triggers); |
28ab034a | 2269 | ret = lttng_triggers_serialize(return_triggers, &cmd_ctx->reply_payload); |
fbc9f37d JR |
2270 | lttng_triggers_destroy(return_triggers); |
2271 | if (ret) { | |
2272 | ERR("Failed to serialize triggers in reply to `list triggers` command"); | |
2273 | ret = LTTNG_ERR_NOMEM; | |
2274 | goto error; | |
2275 | } | |
2276 | ||
28ab034a | 2277 | payload_size = cmd_ctx->reply_payload.buffer.size - original_payload_size; |
fbc9f37d JR |
2278 | |
2279 | update_lttng_msg(cmd_ctx, 0, payload_size); | |
2280 | ||
2281 | ret = LTTNG_OK; | |
2282 | break; | |
2283 | } | |
37a5ef39 | 2284 | case LTTCOMM_SESSIOND_COMMAND_EXECUTE_ERROR_QUERY: |
588c4b0d JG |
2285 | { |
2286 | struct lttng_error_query *query; | |
2287 | const struct lttng_credentials cmd_creds = { | |
2288 | .uid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.uid), | |
2289 | .gid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.gid), | |
2290 | }; | |
cd9adb8b | 2291 | struct lttng_error_query_results *results = nullptr; |
588c4b0d JG |
2292 | size_t original_payload_size; |
2293 | size_t payload_size; | |
2294 | ||
2295 | ret = setup_empty_lttng_msg(cmd_ctx); | |
2296 | if (ret) { | |
2297 | ret = LTTNG_ERR_NOMEM; | |
2298 | goto setup_error; | |
2299 | } | |
2300 | ||
2301 | original_payload_size = cmd_ctx->reply_payload.buffer.size; | |
2302 | ||
28ab034a | 2303 | ret = receive_lttng_error_query(cmd_ctx, *sock, sock_error, &query); |
588c4b0d JG |
2304 | if (ret != LTTNG_OK) { |
2305 | goto error; | |
2306 | } | |
2307 | ||
28ab034a JG |
2308 | ret = cmd_execute_error_query( |
2309 | &cmd_creds, query, &results, the_notification_thread_handle); | |
588c4b0d JG |
2310 | lttng_error_query_destroy(query); |
2311 | if (ret != LTTNG_OK) { | |
2312 | goto error; | |
2313 | } | |
2314 | ||
a0377dfe | 2315 | LTTNG_ASSERT(results); |
28ab034a | 2316 | ret = lttng_error_query_results_serialize(results, &cmd_ctx->reply_payload); |
588c4b0d JG |
2317 | lttng_error_query_results_destroy(results); |
2318 | if (ret) { | |
2319 | ERR("Failed to serialize error query result set in reply to `execute error query` command"); | |
2320 | ret = LTTNG_ERR_NOMEM; | |
2321 | goto error; | |
2322 | } | |
2323 | ||
28ab034a | 2324 | payload_size = cmd_ctx->reply_payload.buffer.size - original_payload_size; |
588c4b0d JG |
2325 | |
2326 | update_lttng_msg(cmd_ctx, 0, payload_size); | |
2327 | ||
2328 | ret = LTTNG_OK; | |
2329 | ||
2330 | break; | |
2331 | } | |
917a718d JG |
2332 | default: |
2333 | ret = LTTNG_ERR_UND; | |
2334 | break; | |
2335 | } | |
2336 | ||
2337 | error: | |
3a91de3a JG |
2338 | if (cmd_ctx->reply_payload.buffer.size == 0) { |
2339 | DBG("Missing llm header, creating one."); | |
cd9adb8b | 2340 | if (setup_lttng_msg_no_cmd_header(cmd_ctx, nullptr, 0) < 0) { |
917a718d JG |
2341 | goto setup_error; |
2342 | } | |
2343 | } | |
2344 | /* Set return code */ | |
3a91de3a | 2345 | ((struct lttcomm_lttng_msg *) (cmd_ctx->reply_payload.buffer.data))->ret_code = ret; |
917a718d JG |
2346 | setup_error: |
2347 | if (cmd_ctx->session) { | |
2348 | session_unlock(cmd_ctx->session); | |
2349 | session_put(cmd_ctx->session); | |
cd9adb8b | 2350 | cmd_ctx->session = nullptr; |
917a718d JG |
2351 | } |
2352 | if (need_tracing_session) { | |
2353 | session_unlock_list(); | |
2354 | } | |
2355 | init_setup_error: | |
a0377dfe | 2356 | LTTNG_ASSERT(!rcu_read_ongoing()); |
917a718d JG |
2357 | return ret; |
2358 | } | |
2359 | ||
cd9adb8b | 2360 | static int create_client_sock() |
917a718d JG |
2361 | { |
2362 | int ret, client_sock; | |
917a718d JG |
2363 | |
2364 | /* Create client tool unix socket */ | |
28ab034a | 2365 | client_sock = lttcomm_create_unix_sock(the_config.client_unix_sock_path.value); |
917a718d | 2366 | if (client_sock < 0) { |
28ab034a | 2367 | ERR("Create unix sock failed: %s", the_config.client_unix_sock_path.value); |
917a718d JG |
2368 | ret = -1; |
2369 | goto end; | |
2370 | } | |
2371 | ||
2372 | /* Set the cloexec flag */ | |
2373 | ret = utils_set_fd_cloexec(client_sock); | |
2374 | if (ret < 0) { | |
2375 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
28ab034a JG |
2376 | "Continuing but note that the consumer daemon will have a " |
2377 | "reference to this socket on exec()", | |
2378 | client_sock); | |
917a718d JG |
2379 | } |
2380 | ||
2381 | /* File permission MUST be 660 */ | |
28ab034a | 2382 | ret = chmod(the_config.client_unix_sock_path.value, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
917a718d | 2383 | if (ret < 0) { |
28ab034a | 2384 | ERR("Set file permissions failed: %s", the_config.client_unix_sock_path.value); |
917a718d | 2385 | PERROR("chmod"); |
18972083 JR |
2386 | (void) lttcomm_close_unix_sock(client_sock); |
2387 | ret = -1; | |
917a718d JG |
2388 | goto end; |
2389 | } | |
2390 | DBG("Created client socket (fd = %i)", client_sock); | |
2391 | ret = client_sock; | |
2392 | end: | |
917a718d JG |
2393 | return ret; |
2394 | } | |
2395 | ||
2396 | static void cleanup_client_thread(void *data) | |
2397 | { | |
7966af57 | 2398 | struct lttng_pipe *quit_pipe = (lttng_pipe *) data; |
917a718d JG |
2399 | |
2400 | lttng_pipe_destroy(quit_pipe); | |
2401 | } | |
2402 | ||
f46376a1 | 2403 | static void thread_init_cleanup(void *data __attribute__((unused))) |
6cb45e93 JG |
2404 | { |
2405 | set_thread_status(false); | |
2406 | } | |
2407 | ||
917a718d JG |
2408 | /* |
2409 | * This thread manage all clients request using the unix client socket for | |
2410 | * communication. | |
2411 | */ | |
2412 | static void *thread_manage_clients(void *data) | |
2413 | { | |
8a00688e | 2414 | int sock = -1, ret, i, err = -1; |
917a718d | 2415 | int sock_error; |
8a00688e | 2416 | uint32_t nb_fd; |
917a718d | 2417 | struct lttng_poll_event events; |
0f68efb6 | 2418 | const int client_sock = thread_state.client_sock; |
7966af57 | 2419 | struct lttng_pipe *quit_pipe = (lttng_pipe *) data; |
917a718d | 2420 | const int thread_quit_pipe_fd = lttng_pipe_get_readfd(quit_pipe); |
3a91de3a | 2421 | struct command_ctx cmd_ctx = {}; |
917a718d JG |
2422 | |
2423 | DBG("[thread] Manage client started"); | |
2424 | ||
3a91de3a JG |
2425 | lttng_payload_init(&cmd_ctx.reply_payload); |
2426 | ||
917a718d JG |
2427 | is_root = (getuid() == 0); |
2428 | ||
cd9adb8b | 2429 | pthread_cleanup_push(thread_init_cleanup, nullptr); |
917a718d JG |
2430 | |
2431 | rcu_register_thread(); | |
2432 | ||
412d7227 | 2433 | health_register(the_health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
917a718d JG |
2434 | |
2435 | health_code_update(); | |
2436 | ||
2437 | ret = lttcomm_listen_unix_sock(client_sock); | |
2438 | if (ret < 0) { | |
2439 | goto error_listen; | |
2440 | } | |
2441 | ||
2442 | /* | |
2443 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
2444 | * more will be added to this poll set. | |
2445 | */ | |
2446 | ret = lttng_poll_create(&events, 2, LTTNG_CLOEXEC); | |
2447 | if (ret < 0) { | |
2448 | goto error_create_poll; | |
2449 | } | |
2450 | ||
2451 | /* Add the application registration socket */ | |
2452 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
2453 | if (ret < 0) { | |
2454 | goto error; | |
2455 | } | |
2456 | ||
2457 | /* Add thread quit pipe */ | |
1524f98c | 2458 | ret = lttng_poll_add(&events, thread_quit_pipe_fd, LPOLLIN); |
917a718d JG |
2459 | if (ret < 0) { |
2460 | goto error; | |
2461 | } | |
2462 | ||
6cb45e93 | 2463 | /* Set state as running. */ |
0d163d56 | 2464 | set_thread_status(true); |
6cb45e93 JG |
2465 | pthread_cleanup_pop(0); |
2466 | ||
917a718d JG |
2467 | /* This testpoint is after we signal readiness to the parent. */ |
2468 | if (testpoint(sessiond_thread_manage_clients)) { | |
2469 | goto error; | |
2470 | } | |
2471 | ||
2472 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { | |
2473 | goto error; | |
2474 | } | |
2475 | ||
2476 | health_code_update(); | |
2477 | ||
cd9adb8b | 2478 | while (true) { |
917a718d JG |
2479 | const struct cmd_completion_handler *cmd_completion_handler; |
2480 | ||
7966af57 SM |
2481 | cmd_ctx.creds.uid = UINT32_MAX; |
2482 | cmd_ctx.creds.gid = UINT32_MAX; | |
2483 | cmd_ctx.creds.pid = 0; | |
cd9adb8b | 2484 | cmd_ctx.session = nullptr; |
fe489250 | 2485 | lttng_payload_clear(&cmd_ctx.reply_payload); |
e368fb43 | 2486 | cmd_ctx.lttng_msg_size = 0; |
3a91de3a | 2487 | |
917a718d JG |
2488 | DBG("Accepting client command ..."); |
2489 | ||
2490 | /* Inifinite blocking call, waiting for transmission */ | |
2491 | restart: | |
2492 | health_poll_entry(); | |
2493 | ret = lttng_poll_wait(&events, -1); | |
2494 | health_poll_exit(); | |
2495 | if (ret < 0) { | |
2496 | /* | |
2497 | * Restart interrupted system call. | |
2498 | */ | |
2499 | if (errno == EINTR) { | |
2500 | goto restart; | |
2501 | } | |
2502 | goto error; | |
2503 | } | |
2504 | ||
2505 | nb_fd = ret; | |
2506 | ||
2507 | for (i = 0; i < nb_fd; i++) { | |
8a00688e MJ |
2508 | /* Fetch once the poll data. */ |
2509 | const auto revents = LTTNG_POLL_GETEV(&events, i); | |
2510 | const auto pollfd = LTTNG_POLL_GETFD(&events, i); | |
917a718d JG |
2511 | |
2512 | health_code_update(); | |
2513 | ||
8a00688e | 2514 | /* Activity on thread quit pipe, exiting. */ |
917a718d | 2515 | if (pollfd == thread_quit_pipe_fd) { |
8a00688e | 2516 | DBG("Activity on thread quit pipe"); |
917a718d JG |
2517 | err = 0; |
2518 | goto exit; | |
8a00688e MJ |
2519 | } |
2520 | ||
2521 | /* Event on the registration socket */ | |
2522 | if (revents & LPOLLIN) { | |
2523 | continue; | |
2524 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2525 | ERR("Client socket poll error"); | |
2526 | goto error; | |
917a718d | 2527 | } else { |
8a00688e MJ |
2528 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); |
2529 | goto error; | |
917a718d JG |
2530 | } |
2531 | } | |
2532 | ||
2533 | DBG("Wait for client response"); | |
2534 | ||
2535 | health_code_update(); | |
2536 | ||
2537 | sock = lttcomm_accept_unix_sock(client_sock); | |
2538 | if (sock < 0) { | |
2539 | goto error; | |
2540 | } | |
2541 | ||
2542 | /* | |
2543 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
2544 | * show must go on. | |
2545 | */ | |
2546 | (void) utils_set_fd_cloexec(sock); | |
2547 | ||
2548 | /* Set socket option for credentials retrieval */ | |
2549 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
2550 | if (ret < 0) { | |
2551 | goto error; | |
2552 | } | |
2553 | ||
917a718d JG |
2554 | health_code_update(); |
2555 | ||
2556 | /* | |
2557 | * Data is received from the lttng client. The struct | |
2558 | * lttcomm_session_msg (lsm) contains the command and data request of | |
2559 | * the client. | |
2560 | */ | |
2561 | DBG("Receiving data from client ..."); | |
28ab034a JG |
2562 | ret = lttcomm_recv_creds_unix_sock( |
2563 | sock, &cmd_ctx.lsm, sizeof(struct lttcomm_session_msg), &cmd_ctx.creds); | |
3a91de3a JG |
2564 | if (ret != sizeof(struct lttcomm_session_msg)) { |
2565 | DBG("Incomplete recv() from client... continuing"); | |
917a718d JG |
2566 | ret = close(sock); |
2567 | if (ret) { | |
2568 | PERROR("close"); | |
2569 | } | |
2570 | sock = -1; | |
917a718d JG |
2571 | continue; |
2572 | } | |
2573 | ||
2574 | health_code_update(); | |
2575 | ||
2576 | // TODO: Validate cmd_ctx including sanity check for | |
2577 | // security purpose. | |
2578 | ||
2579 | rcu_thread_online(); | |
2580 | /* | |
2581 | * This function dispatch the work to the kernel or userspace tracer | |
2582 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
2583 | * informations for the client. The command context struct contains | |
2584 | * everything this function may needs. | |
2585 | */ | |
3a91de3a | 2586 | ret = process_client_msg(&cmd_ctx, &sock, &sock_error); |
917a718d JG |
2587 | rcu_thread_offline(); |
2588 | if (ret < 0) { | |
3e3665b8 JG |
2589 | if (sock >= 0) { |
2590 | ret = close(sock); | |
2591 | if (ret) { | |
2592 | PERROR("close"); | |
2593 | } | |
4a76dfd3 JR |
2594 | } |
2595 | sock = -1; | |
917a718d JG |
2596 | /* |
2597 | * TODO: Inform client somehow of the fatal error. At | |
2598 | * this point, ret < 0 means that a zmalloc failed | |
2599 | * (ENOMEM). Error detected but still accept | |
2600 | * command, unless a socket error has been | |
2601 | * detected. | |
2602 | */ | |
917a718d JG |
2603 | continue; |
2604 | } | |
2605 | ||
c7e9ffbd | 2606 | if (ret < LTTNG_OK || ret >= LTTNG_ERR_NR) { |
7e397c55 | 2607 | WARN("Command returned an invalid status code, returning unknown error: " |
28ab034a JG |
2608 | "command type = %s (%d), ret = %d", |
2609 | lttcomm_sessiond_command_str( | |
2610 | (lttcomm_sessiond_command) cmd_ctx.lsm.cmd_type), | |
2611 | cmd_ctx.lsm.cmd_type, | |
2612 | ret); | |
c7e9ffbd JG |
2613 | ret = LTTNG_ERR_UNK; |
2614 | } | |
2615 | ||
917a718d JG |
2616 | cmd_completion_handler = cmd_pop_completion_handler(); |
2617 | if (cmd_completion_handler) { | |
2618 | enum lttng_error_code completion_code; | |
2619 | ||
28ab034a | 2620 | completion_code = cmd_completion_handler->run(cmd_completion_handler->data); |
917a718d | 2621 | if (completion_code != LTTNG_OK) { |
917a718d JG |
2622 | continue; |
2623 | } | |
2624 | } | |
2625 | ||
2626 | health_code_update(); | |
2627 | ||
3e3665b8 | 2628 | if (sock >= 0) { |
3a91de3a | 2629 | struct lttng_payload_view view = |
28ab034a JG |
2630 | lttng_payload_view_from_payload(&cmd_ctx.reply_payload, 0, -1); |
2631 | struct lttcomm_lttng_msg *llm = | |
2632 | (typeof(llm)) cmd_ctx.reply_payload.buffer.data; | |
3a91de3a | 2633 | |
a0377dfe FD |
2634 | LTTNG_ASSERT(cmd_ctx.reply_payload.buffer.size >= sizeof(*llm)); |
2635 | LTTNG_ASSERT(cmd_ctx.lttng_msg_size == cmd_ctx.reply_payload.buffer.size); | |
3a91de3a | 2636 | |
fe489250 | 2637 | llm->fd_count = lttng_payload_view_get_fd_handle_count(&view); |
e368fb43 | 2638 | |
3e3665b8 | 2639 | DBG("Sending response (size: %d, retcode: %s (%d))", |
28ab034a JG |
2640 | cmd_ctx.lttng_msg_size, |
2641 | lttng_strerror(-llm->ret_code), | |
2642 | llm->ret_code); | |
3a91de3a | 2643 | ret = send_unix_sock(sock, &view); |
3e3665b8 JG |
2644 | if (ret < 0) { |
2645 | ERR("Failed to send data back to client"); | |
2646 | } | |
917a718d | 2647 | |
3e3665b8 JG |
2648 | /* End of transmission */ |
2649 | ret = close(sock); | |
2650 | if (ret) { | |
2651 | PERROR("close"); | |
2652 | } | |
4a76dfd3 JR |
2653 | } |
2654 | sock = -1; | |
917a718d | 2655 | |
917a718d JG |
2656 | health_code_update(); |
2657 | } | |
2658 | ||
2659 | exit: | |
2660 | error: | |
2661 | if (sock >= 0) { | |
2662 | ret = close(sock); | |
2663 | if (ret) { | |
2664 | PERROR("close"); | |
2665 | } | |
2666 | } | |
2667 | ||
2668 | lttng_poll_clean(&events); | |
917a718d JG |
2669 | |
2670 | error_listen: | |
2671 | error_create_poll: | |
412d7227 | 2672 | unlink(the_config.client_unix_sock_path.value); |
0f68efb6 JG |
2673 | ret = close(client_sock); |
2674 | if (ret) { | |
2675 | PERROR("close"); | |
917a718d JG |
2676 | } |
2677 | ||
2678 | if (err) { | |
2679 | health_error(); | |
2680 | ERR("Health error occurred in %s", __func__); | |
2681 | } | |
2682 | ||
412d7227 | 2683 | health_unregister(the_health_sessiond); |
917a718d JG |
2684 | |
2685 | DBG("Client thread dying"); | |
3a91de3a | 2686 | lttng_payload_reset(&cmd_ctx.reply_payload); |
917a718d | 2687 | rcu_unregister_thread(); |
cd9adb8b | 2688 | return nullptr; |
917a718d JG |
2689 | } |
2690 | ||
28ab034a | 2691 | static bool shutdown_client_thread(void *thread_data) |
917a718d | 2692 | { |
7966af57 | 2693 | struct lttng_pipe *client_quit_pipe = (lttng_pipe *) thread_data; |
917a718d JG |
2694 | const int write_fd = lttng_pipe_get_writefd(client_quit_pipe); |
2695 | ||
2696 | return notify_thread_pipe(write_fd) == 1; | |
2697 | } | |
2698 | ||
cd9adb8b | 2699 | struct lttng_thread *launch_client_thread() |
917a718d | 2700 | { |
6cb45e93 | 2701 | bool thread_running; |
917a718d | 2702 | struct lttng_pipe *client_quit_pipe; |
cd9adb8b | 2703 | struct lttng_thread *thread = nullptr; |
0f68efb6 | 2704 | int client_sock_fd = -1; |
917a718d | 2705 | |
6cb45e93 | 2706 | sem_init(&thread_state.ready, 0, 0); |
917a718d JG |
2707 | client_quit_pipe = lttng_pipe_open(FD_CLOEXEC); |
2708 | if (!client_quit_pipe) { | |
2709 | goto error; | |
2710 | } | |
2711 | ||
0f68efb6 JG |
2712 | client_sock_fd = create_client_sock(); |
2713 | if (client_sock_fd < 0) { | |
2714 | goto error; | |
2715 | } | |
2716 | ||
2717 | thread_state.client_sock = client_sock_fd; | |
917a718d | 2718 | thread = lttng_thread_create("Client management", |
28ab034a JG |
2719 | thread_manage_clients, |
2720 | shutdown_client_thread, | |
2721 | cleanup_client_thread, | |
2722 | client_quit_pipe); | |
917a718d JG |
2723 | if (!thread) { |
2724 | goto error; | |
2725 | } | |
0f68efb6 JG |
2726 | /* The client thread now owns the client sock fd and the quit pipe. */ |
2727 | client_sock_fd = -1; | |
cd9adb8b | 2728 | client_quit_pipe = nullptr; |
917a718d JG |
2729 | |
2730 | /* | |
2731 | * This thread is part of the threads that need to be fully | |
2732 | * initialized before the session daemon is marked as "ready". | |
2733 | */ | |
6cb45e93 JG |
2734 | thread_running = wait_thread_status(); |
2735 | if (!thread_running) { | |
0f68efb6 | 2736 | goto error; |
6cb45e93 | 2737 | } |
917a718d JG |
2738 | return thread; |
2739 | error: | |
0f68efb6 JG |
2740 | if (client_sock_fd >= 0) { |
2741 | if (close(client_sock_fd)) { | |
2742 | PERROR("Failed to close client socket"); | |
2743 | } | |
2744 | } | |
2745 | lttng_thread_put(thread); | |
917a718d | 2746 | cleanup_client_thread(client_quit_pipe); |
cd9adb8b | 2747 | return nullptr; |
917a718d | 2748 | } |