Commit | Line | Data |
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826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
0fdd1e2c | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
fac6795d | 4 | * |
54d01ffb DG |
5 | * This program is free software; you can redistribute it and/or modify it |
6 | * under the terms of the GNU General Public License as published by the Free | |
7 | * Software Foundation; only version 2 of the License. | |
91d76f53 | 8 | * |
54d01ffb DG |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
91d76f53 | 13 | * |
54d01ffb DG |
14 | * You should have received a copy of the GNU General Public License along with |
15 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
16 | * Place - Suite 330, Boston, MA 02111-1307, USA. | |
fac6795d DG |
17 | */ |
18 | ||
19 | #define _GNU_SOURCE | |
ca4537d3 | 20 | #include <fcntl.h> |
fac6795d DG |
21 | #include <getopt.h> |
22 | #include <grp.h> | |
23 | #include <limits.h> | |
24 | #include <pthread.h> | |
8c0faa1d | 25 | #include <semaphore.h> |
fac6795d DG |
26 | #include <signal.h> |
27 | #include <stdio.h> | |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
0fdd1e2c | 30 | #include <sys/mman.h> |
b73401da | 31 | #include <sys/mount.h> |
1e307fab | 32 | #include <sys/resource.h> |
fac6795d DG |
33 | #include <sys/socket.h> |
34 | #include <sys/stat.h> | |
35 | #include <sys/types.h> | |
0fdd1e2c DG |
36 | #include <sys/wait.h> |
37 | #include <urcu/futex.h> | |
fac6795d | 38 | #include <unistd.h> |
3bd1e081 | 39 | #include <config.h> |
fac6795d | 40 | |
990570ed | 41 | #include <common/common.h> |
0ba98ebc | 42 | #include <common/compat/poll.h> |
db758600 DG |
43 | #include <common/defaults.h> |
44 | #include <common/kernel-consumer/kernel-consumer.h> | |
45 | #include <common/ust-consumer/ust-consumer.h> | |
fac6795d | 46 | |
10a8a223 | 47 | #include "lttng-sessiond.h" |
54d01ffb | 48 | #include "channel.h" |
099e26bd | 49 | #include "context.h" |
54d01ffb | 50 | #include "event.h" |
099e26bd | 51 | #include "futex.h" |
4771f025 | 52 | #include "kernel.h" |
096102bd | 53 | #include "modprobe.h" |
0fdd1e2c | 54 | #include "shm.h" |
1e307fab | 55 | #include "ust-ctl.h" |
8e68d1c8 | 56 | #include "utils.h" |
fac6795d | 57 | |
ebaeda94 MD |
58 | #define CONSUMERD_FILE "lttng-consumerd" |
59 | ||
3bd1e081 MD |
60 | struct consumer_data { |
61 | enum lttng_consumer_type type; | |
62 | ||
63 | pthread_t thread; /* Worker thread interacting with the consumer */ | |
64 | sem_t sem; | |
65 | ||
66 | /* Mutex to control consumerd pid assignation */ | |
67 | pthread_mutex_t pid_mutex; | |
68 | pid_t pid; | |
69 | ||
70 | int err_sock; | |
71 | int cmd_sock; | |
72 | ||
73 | /* consumer error and command Unix socket path */ | |
74 | char err_unix_sock_path[PATH_MAX]; | |
75 | char cmd_unix_sock_path[PATH_MAX]; | |
76 | }; | |
77 | ||
75462a81 | 78 | /* Const values */ |
686204ab | 79 | const char default_home_dir[] = DEFAULT_HOME_DIR; |
bbccc3d2 | 80 | const char default_tracing_group[] = DEFAULT_TRACING_GROUP; |
686204ab MD |
81 | const char default_ust_sock_dir[] = DEFAULT_UST_SOCK_DIR; |
82 | const char default_global_apps_pipe[] = DEFAULT_GLOBAL_APPS_PIPE; | |
83 | ||
fac6795d | 84 | /* Variables */ |
1d4b027a | 85 | int opt_verbose; /* Not static for lttngerr.h */ |
3bd1e081 | 86 | int opt_verbose_consumer; /* Not static for lttngerr.h */ |
1d4b027a | 87 | int opt_quiet; /* Not static for lttngerr.h */ |
d063d709 | 88 | |
fac6795d DG |
89 | const char *progname; |
90 | const char *opt_tracing_group; | |
5b8719f5 | 91 | static int opt_sig_parent; |
fac6795d | 92 | static int opt_daemon; |
4fba7219 | 93 | static int opt_no_kernel; |
fac6795d | 94 | static int is_root; /* Set to 1 if the daemon is running as root */ |
1d4b027a | 95 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
67e40797 | 96 | static char *rundir; |
3bd1e081 MD |
97 | |
98 | /* Consumer daemon specific control data */ | |
99 | static struct consumer_data kconsumer_data = { | |
100 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
101 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
102 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
3bd1e081 | 103 | }; |
7753dea8 MD |
104 | static struct consumer_data ustconsumer64_data = { |
105 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
106 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
107 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
7753dea8 MD |
108 | }; |
109 | static struct consumer_data ustconsumer32_data = { | |
110 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
111 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
112 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
3bd1e081 MD |
113 | }; |
114 | ||
099e26bd | 115 | static int dispatch_thread_exit; |
fac6795d | 116 | |
54d01ffb DG |
117 | /* Global application Unix socket path */ |
118 | static char apps_unix_sock_path[PATH_MAX]; | |
119 | /* Global client Unix socket path */ | |
120 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
121 | /* global wait shm path for UST */ |
122 | static char wait_shm_path[PATH_MAX]; | |
fac6795d | 123 | |
1d4b027a | 124 | /* Sockets and FDs */ |
a4b35e07 MD |
125 | static int client_sock = -1; |
126 | static int apps_sock = -1; | |
127 | static int kernel_tracer_fd = -1; | |
76d7553f | 128 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 129 | |
273ea72c DG |
130 | /* |
131 | * Quit pipe for all threads. This permits a single cancellation point | |
132 | * for all threads when receiving an event on the pipe. | |
133 | */ | |
76d7553f | 134 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 135 | |
099e26bd DG |
136 | /* |
137 | * This pipe is used to inform the thread managing application communication | |
138 | * that a command is queued and ready to be processed. | |
139 | */ | |
76d7553f | 140 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 141 | |
1d4b027a | 142 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 143 | static pthread_t apps_thread; |
099e26bd | 144 | static pthread_t reg_apps_thread; |
1d4b027a | 145 | static pthread_t client_thread; |
7a485870 | 146 | static pthread_t kernel_thread; |
099e26bd | 147 | static pthread_t dispatch_thread; |
5eb91c98 | 148 | |
fac6795d | 149 | |
099e26bd DG |
150 | /* |
151 | * UST registration command queue. This queue is tied with a futex and uses a N | |
152 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
153 | * | |
154 | * The thread_manage_apps and thread_dispatch_ust_registration interact with | |
155 | * this queue and the wait/wake scheme. | |
156 | */ | |
157 | static struct ust_cmd_queue ust_cmd_queue; | |
158 | ||
b5541356 DG |
159 | /* |
160 | * Pointer initialized before thread creation. | |
161 | * | |
162 | * This points to the tracing session list containing the session count and a | |
163 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
164 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 165 | * |
d063d709 | 166 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 167 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
168 | */ |
169 | static struct ltt_session_list *session_list_ptr; | |
170 | ||
7753dea8 MD |
171 | int ust_consumerd64_fd = -1; |
172 | int ust_consumerd32_fd = -1; | |
173 | ||
fb6f1fa2 YB |
174 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
175 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
176 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
177 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
fb09408a MD |
178 | |
179 | static | |
7753dea8 | 180 | void setup_consumerd_path(void) |
fb09408a | 181 | { |
fc7a59ce | 182 | const char *bin, *libdir; |
fb09408a | 183 | |
7753dea8 MD |
184 | /* |
185 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
186 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
187 | * has not been defined. | |
7753dea8 | 188 | */ |
ebaeda94 | 189 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
190 | if (!consumerd32_bin[0]) { |
191 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
192 | } |
193 | if (!consumerd32_libdir[0]) { | |
194 | consumerd32_libdir = INSTALL_LIB_PATH; | |
195 | } | |
196 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
197 | if (!consumerd64_bin[0]) { |
198 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 199 | } |
ebaeda94 MD |
200 | if (!consumerd64_libdir[0]) { |
201 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
202 | } |
203 | #else | |
204 | #error "Unknown bitness" | |
205 | #endif | |
206 | ||
fb09408a MD |
207 | /* |
208 | * runtime env. var. overrides the build default. | |
209 | */ | |
fc7a59ce AM |
210 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
211 | if (bin) { | |
212 | consumerd32_bin = bin; | |
7753dea8 | 213 | } |
fc7a59ce AM |
214 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
215 | if (bin) { | |
216 | consumerd64_bin = bin; | |
ebaeda94 | 217 | } |
72f579ee | 218 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
219 | if (libdir) { |
220 | consumerd32_libdir = libdir; | |
221 | } | |
72f579ee | 222 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
223 | if (libdir) { |
224 | consumerd64_libdir = libdir; | |
fb09408a MD |
225 | } |
226 | } | |
227 | ||
5eb91c98 DG |
228 | /* |
229 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
230 | */ | |
231 | static int create_thread_poll_set(struct lttng_poll_event *events, | |
232 | unsigned int size) | |
233 | { | |
234 | int ret; | |
235 | ||
236 | if (events == NULL || size == 0) { | |
237 | ret = -1; | |
238 | goto error; | |
239 | } | |
240 | ||
241 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
242 | if (ret < 0) { | |
243 | goto error; | |
244 | } | |
245 | ||
246 | /* Add quit pipe */ | |
247 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN); | |
248 | if (ret < 0) { | |
249 | goto error; | |
250 | } | |
251 | ||
252 | return 0; | |
253 | ||
254 | error: | |
255 | return ret; | |
256 | } | |
257 | ||
258 | /* | |
259 | * Check if the thread quit pipe was triggered. | |
260 | * | |
261 | * Return 1 if it was triggered else 0; | |
262 | */ | |
263 | static int check_thread_quit_pipe(int fd, uint32_t events) | |
264 | { | |
265 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
266 | return 1; | |
267 | } | |
268 | ||
269 | return 0; | |
270 | } | |
271 | ||
0fdd1e2c DG |
272 | /* |
273 | * Return group ID of the tracing group or -1 if not found. | |
274 | */ | |
996b65c8 MD |
275 | static gid_t allowed_group(void) |
276 | { | |
277 | struct group *grp; | |
278 | ||
274e143b MD |
279 | if (opt_tracing_group) { |
280 | grp = getgrnam(opt_tracing_group); | |
281 | } else { | |
282 | grp = getgrnam(default_tracing_group); | |
283 | } | |
996b65c8 MD |
284 | if (!grp) { |
285 | return -1; | |
286 | } else { | |
287 | return grp->gr_gid; | |
288 | } | |
289 | } | |
290 | ||
273ea72c | 291 | /* |
5eb91c98 | 292 | * Init thread quit pipe. |
273ea72c DG |
293 | * |
294 | * Return -1 on error or 0 if all pipes are created. | |
295 | */ | |
296 | static int init_thread_quit_pipe(void) | |
297 | { | |
ca4537d3 | 298 | int ret; |
273ea72c | 299 | |
ca4537d3 | 300 | ret = pipe2(thread_quit_pipe, O_CLOEXEC); |
273ea72c | 301 | if (ret < 0) { |
76d7553f | 302 | PERROR("thread quit pipe"); |
273ea72c DG |
303 | goto error; |
304 | } | |
305 | ||
306 | error: | |
307 | return ret; | |
308 | } | |
309 | ||
fac6795d | 310 | /* |
d063d709 DG |
311 | * Complete teardown of a kernel session. This free all data structure related |
312 | * to a kernel session and update counter. | |
fac6795d | 313 | */ |
1d4b027a | 314 | static void teardown_kernel_session(struct ltt_session *session) |
fac6795d | 315 | { |
8f7a84dd | 316 | if (!session->kernel_session) { |
99bab54f | 317 | DBG3("No kernel session when tearing down session"); |
84ea9c99 | 318 | return; |
8f7a84dd DG |
319 | } |
320 | ||
84ea9c99 | 321 | DBG("Tearing down kernel session"); |
d9800920 | 322 | |
84ea9c99 MD |
323 | /* |
324 | * If a custom kernel consumer was registered, close the socket before | |
325 | * tearing down the complete kernel session structure | |
326 | */ | |
327 | if (session->kernel_session->consumer_fd != kconsumer_data.cmd_sock) { | |
328 | lttcomm_close_unix_sock(session->kernel_session->consumer_fd); | |
fac6795d | 329 | } |
84ea9c99 MD |
330 | |
331 | trace_kernel_destroy_session(session->kernel_session); | |
fac6795d DG |
332 | } |
333 | ||
f6a9efaa DG |
334 | /* |
335 | * Complete teardown of all UST sessions. This will free everything on his path | |
336 | * and destroy the core essence of all ust sessions :) | |
337 | */ | |
338 | static void teardown_ust_session(struct ltt_session *session) | |
339 | { | |
84cd17c6 MD |
340 | int ret; |
341 | ||
8f7a84dd | 342 | if (!session->ust_session) { |
99bab54f | 343 | DBG3("No UST session when tearing down session"); |
f470a390 | 344 | return; |
8f7a84dd DG |
345 | } |
346 | ||
84ea9c99 | 347 | DBG("Tearing down UST session(s)"); |
8f7a84dd | 348 | |
84cd17c6 MD |
349 | ret = ust_app_destroy_trace_all(session->ust_session); |
350 | if (ret) { | |
351 | ERR("Error in ust_app_destroy_trace_all"); | |
352 | } | |
8f7a84dd | 353 | |
f6a9efaa DG |
354 | trace_ust_destroy_session(session->ust_session); |
355 | } | |
356 | ||
099e26bd DG |
357 | /* |
358 | * Stop all threads by closing the thread quit pipe. | |
359 | */ | |
cf3af59e MD |
360 | static void stop_threads(void) |
361 | { | |
5eb91c98 DG |
362 | int ret; |
363 | ||
cf3af59e MD |
364 | /* Stopping all threads */ |
365 | DBG("Terminating all threads"); | |
54d01ffb | 366 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
367 | if (ret < 0) { |
368 | ERR("write error on thread quit pipe"); | |
369 | } | |
370 | ||
099e26bd DG |
371 | /* Dispatch thread */ |
372 | dispatch_thread_exit = 1; | |
373 | futex_nto1_wake(&ust_cmd_queue.futex); | |
cf3af59e MD |
374 | } |
375 | ||
fac6795d | 376 | /* |
d063d709 | 377 | * Cleanup the daemon |
fac6795d | 378 | */ |
cf3af59e | 379 | static void cleanup(void) |
fac6795d | 380 | { |
76d7553f | 381 | int ret, i; |
1d4b027a | 382 | char *cmd; |
af9737e9 | 383 | struct ltt_session *sess, *stmp; |
fac6795d | 384 | |
1d4b027a | 385 | DBG("Cleaning up"); |
e07ae692 | 386 | |
67e40797 DG |
387 | DBG("Removing %s directory", rundir); |
388 | ret = asprintf(&cmd, "rm -rf %s", rundir); | |
389 | if (ret < 0) { | |
390 | ERR("asprintf failed. Something is really wrong!"); | |
391 | } | |
5461b305 | 392 | |
67e40797 DG |
393 | /* Remove lttng run directory */ |
394 | ret = system(cmd); | |
395 | if (ret < 0) { | |
396 | ERR("Unable to clean %s", rundir); | |
1d4b027a | 397 | } |
67e40797 | 398 | free(cmd); |
5461b305 | 399 | |
99bab54f | 400 | DBG("Cleaning up all sessions"); |
fac6795d | 401 | |
b5541356 | 402 | /* Destroy session list mutex */ |
273ea72c DG |
403 | if (session_list_ptr != NULL) { |
404 | pthread_mutex_destroy(&session_list_ptr->lock); | |
405 | ||
406 | /* Cleanup ALL session */ | |
54d01ffb DG |
407 | cds_list_for_each_entry_safe(sess, stmp, |
408 | &session_list_ptr->head, list) { | |
273ea72c | 409 | teardown_kernel_session(sess); |
f6a9efaa DG |
410 | teardown_ust_session(sess); |
411 | free(sess); | |
273ea72c DG |
412 | } |
413 | } | |
414 | ||
099e26bd | 415 | DBG("Closing all UST sockets"); |
56fff090 | 416 | ust_app_clean_list(); |
099e26bd | 417 | |
3bd1e081 | 418 | pthread_mutex_destroy(&kconsumer_data.pid_mutex); |
b5541356 | 419 | |
4fba7219 DG |
420 | if (is_root && !opt_no_kernel) { |
421 | DBG2("Closing kernel fd"); | |
a4b35e07 | 422 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
423 | ret = close(kernel_tracer_fd); |
424 | if (ret) { | |
425 | PERROR("close"); | |
426 | } | |
a4b35e07 | 427 | } |
2f50c8a3 | 428 | DBG("Unloading kernel modules"); |
096102bd | 429 | modprobe_remove_lttng_all(); |
2f50c8a3 | 430 | } |
5eb91c98 | 431 | |
76d7553f MD |
432 | /* |
433 | * Closing all pipes used for communication between threads. | |
434 | */ | |
435 | for (i = 0; i < 2; i++) { | |
436 | if (kernel_poll_pipe[i] >= 0) { | |
437 | ret = close(kernel_poll_pipe[i]); | |
438 | if (ret) { | |
439 | PERROR("close"); | |
440 | } | |
441 | ||
442 | } | |
443 | } | |
444 | for (i = 0; i < 2; i++) { | |
445 | if (thread_quit_pipe[i] >= 0) { | |
446 | ret = close(thread_quit_pipe[i]); | |
447 | if (ret) { | |
448 | PERROR("close"); | |
449 | } | |
450 | } | |
451 | } | |
452 | for (i = 0; i < 2; i++) { | |
453 | if (apps_cmd_pipe[i] >= 0) { | |
454 | ret = close(apps_cmd_pipe[i]); | |
455 | if (ret) { | |
456 | PERROR("close"); | |
457 | } | |
458 | } | |
459 | } | |
421cb601 DG |
460 | |
461 | /* <fun> */ | |
f56a39af | 462 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
463 | "Matthew, BEET driven development works!%c[%dm", |
464 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
465 | /* </fun> */ | |
fac6795d DG |
466 | } |
467 | ||
e065084a | 468 | /* |
d063d709 | 469 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 470 | * |
d063d709 | 471 | * Return lttcomm error code. |
e065084a DG |
472 | */ |
473 | static int send_unix_sock(int sock, void *buf, size_t len) | |
474 | { | |
475 | /* Check valid length */ | |
476 | if (len <= 0) { | |
477 | return -1; | |
478 | } | |
479 | ||
480 | return lttcomm_send_unix_sock(sock, buf, len); | |
481 | } | |
482 | ||
5461b305 | 483 | /* |
d063d709 | 484 | * Free memory of a command context structure. |
5461b305 | 485 | */ |
a2fb29a5 | 486 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 487 | { |
a2fb29a5 DG |
488 | DBG("Clean command context structure"); |
489 | if (*cmd_ctx) { | |
490 | if ((*cmd_ctx)->llm) { | |
491 | free((*cmd_ctx)->llm); | |
5461b305 | 492 | } |
a2fb29a5 DG |
493 | if ((*cmd_ctx)->lsm) { |
494 | free((*cmd_ctx)->lsm); | |
5461b305 | 495 | } |
a2fb29a5 DG |
496 | free(*cmd_ctx); |
497 | *cmd_ctx = NULL; | |
5461b305 DG |
498 | } |
499 | } | |
500 | ||
f3ed775e | 501 | /* |
d063d709 | 502 | * Send all stream fds of kernel channel to the consumer. |
f3ed775e | 503 | */ |
2bdd86d4 | 504 | static int send_kconsumer_channel_streams(struct consumer_data *consumer_data, |
6df2e2c9 MD |
505 | int sock, struct ltt_kernel_channel *channel, |
506 | uid_t uid, gid_t gid) | |
f3ed775e DG |
507 | { |
508 | int ret; | |
f3ed775e | 509 | struct ltt_kernel_stream *stream; |
3bd1e081 | 510 | struct lttcomm_consumer_msg lkm; |
f3ed775e | 511 | |
3bd1e081 | 512 | DBG("Sending streams of channel %s to kernel consumer", |
54d01ffb | 513 | channel->channel->name); |
f3ed775e | 514 | |
3bd1e081 MD |
515 | /* Send channel */ |
516 | lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL; | |
517 | lkm.u.channel.channel_key = channel->fd; | |
518 | lkm.u.channel.max_sb_size = channel->channel->attr.subbuf_size; | |
519 | lkm.u.channel.mmap_len = 0; /* for kernel */ | |
2bdd86d4 | 520 | DBG("Sending channel %d to consumer", lkm.u.channel.channel_key); |
3bd1e081 | 521 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); |
f3ed775e | 522 | if (ret < 0) { |
76d7553f | 523 | PERROR("send consumer channel"); |
f3ed775e DG |
524 | goto error; |
525 | } | |
526 | ||
3bd1e081 | 527 | /* Send streams */ |
7a485870 | 528 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { |
3bd1e081 MD |
529 | if (!stream->fd) { |
530 | continue; | |
531 | } | |
532 | lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM; | |
533 | lkm.u.stream.channel_key = channel->fd; | |
534 | lkm.u.stream.stream_key = stream->fd; | |
535 | lkm.u.stream.state = stream->state; | |
536 | lkm.u.stream.output = channel->channel->attr.output; | |
537 | lkm.u.stream.mmap_len = 0; /* for kernel */ | |
6df2e2c9 MD |
538 | lkm.u.stream.uid = uid; |
539 | lkm.u.stream.gid = gid; | |
3bd1e081 MD |
540 | strncpy(lkm.u.stream.path_name, stream->pathname, PATH_MAX - 1); |
541 | lkm.u.stream.path_name[PATH_MAX - 1] = '\0'; | |
542 | DBG("Sending stream %d to consumer", lkm.u.stream.stream_key); | |
543 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
544 | if (ret < 0) { | |
76d7553f | 545 | PERROR("send consumer stream"); |
3bd1e081 MD |
546 | goto error; |
547 | } | |
548 | ret = lttcomm_send_fds_unix_sock(sock, &stream->fd, 1); | |
549 | if (ret < 0) { | |
76d7553f | 550 | PERROR("send consumer stream ancillary data"); |
3bd1e081 | 551 | goto error; |
f3ed775e DG |
552 | } |
553 | } | |
554 | ||
3bd1e081 | 555 | DBG("consumer channel streams sent"); |
f3ed775e DG |
556 | |
557 | return 0; | |
558 | ||
559 | error: | |
560 | return ret; | |
561 | } | |
562 | ||
563 | /* | |
d063d709 | 564 | * Send all stream fds of the kernel session to the consumer. |
f3ed775e | 565 | */ |
2bdd86d4 | 566 | static int send_kconsumer_session_streams(struct consumer_data *consumer_data, |
3bd1e081 | 567 | struct ltt_kernel_session *session) |
f3ed775e DG |
568 | { |
569 | int ret; | |
570 | struct ltt_kernel_channel *chan; | |
3bd1e081 MD |
571 | struct lttcomm_consumer_msg lkm; |
572 | int sock = session->consumer_fd; | |
7a485870 DG |
573 | |
574 | DBG("Sending metadata stream fd"); | |
575 | ||
2bdd86d4 | 576 | /* Extra protection. It's NOT supposed to be set to 0 at this point */ |
d9800920 | 577 | if (session->consumer_fd == 0) { |
3bd1e081 | 578 | session->consumer_fd = consumer_data->cmd_sock; |
d9800920 DG |
579 | } |
580 | ||
7a485870 | 581 | if (session->metadata_stream_fd != 0) { |
3bd1e081 MD |
582 | /* Send metadata channel fd */ |
583 | lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL; | |
584 | lkm.u.channel.channel_key = session->metadata->fd; | |
585 | lkm.u.channel.max_sb_size = session->metadata->conf->attr.subbuf_size; | |
586 | lkm.u.channel.mmap_len = 0; /* for kernel */ | |
587 | DBG("Sending metadata channel %d to consumer", lkm.u.stream.stream_key); | |
588 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
589 | if (ret < 0) { | |
76d7553f | 590 | PERROR("send consumer channel"); |
3bd1e081 MD |
591 | goto error; |
592 | } | |
593 | ||
594 | /* Send metadata stream fd */ | |
595 | lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM; | |
596 | lkm.u.stream.channel_key = session->metadata->fd; | |
597 | lkm.u.stream.stream_key = session->metadata_stream_fd; | |
598 | lkm.u.stream.state = LTTNG_CONSUMER_ACTIVE_STREAM; | |
599 | lkm.u.stream.output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
600 | lkm.u.stream.mmap_len = 0; /* for kernel */ | |
6df2e2c9 MD |
601 | lkm.u.stream.uid = session->uid; |
602 | lkm.u.stream.gid = session->gid; | |
3bd1e081 MD |
603 | strncpy(lkm.u.stream.path_name, session->metadata->pathname, PATH_MAX - 1); |
604 | lkm.u.stream.path_name[PATH_MAX - 1] = '\0'; | |
605 | DBG("Sending metadata stream %d to consumer", lkm.u.stream.stream_key); | |
606 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
607 | if (ret < 0) { | |
76d7553f | 608 | PERROR("send consumer stream"); |
3bd1e081 MD |
609 | goto error; |
610 | } | |
611 | ret = lttcomm_send_fds_unix_sock(sock, &session->metadata_stream_fd, 1); | |
7a485870 | 612 | if (ret < 0) { |
76d7553f | 613 | PERROR("send consumer stream"); |
7a485870 DG |
614 | goto error; |
615 | } | |
616 | } | |
f3ed775e | 617 | |
f3ed775e | 618 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
6df2e2c9 MD |
619 | ret = send_kconsumer_channel_streams(consumer_data, sock, chan, |
620 | session->uid, session->gid); | |
2bdd86d4 MD |
621 | if (ret < 0) { |
622 | goto error; | |
623 | } | |
624 | } | |
625 | ||
626 | DBG("consumer fds (metadata and channel streams) sent"); | |
627 | ||
628 | return 0; | |
629 | ||
630 | error: | |
631 | return ret; | |
632 | } | |
633 | ||
fac6795d | 634 | /* |
0fdd1e2c | 635 | * Notify UST applications using the shm mmap futex. |
fac6795d | 636 | */ |
0fdd1e2c | 637 | static int notify_ust_apps(int active) |
fac6795d | 638 | { |
0fdd1e2c | 639 | char *wait_shm_mmap; |
fac6795d | 640 | |
0fdd1e2c | 641 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 642 | |
0fdd1e2c DG |
643 | /* See shm.c for this call implying mmap, shm and futex calls */ |
644 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
645 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
646 | goto error; |
647 | } | |
648 | ||
0fdd1e2c DG |
649 | /* Wake waiting process */ |
650 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
651 | ||
652 | /* Apps notified successfully */ | |
653 | return 0; | |
fac6795d DG |
654 | |
655 | error: | |
0fdd1e2c | 656 | return -1; |
fac6795d DG |
657 | } |
658 | ||
e065084a | 659 | /* |
d063d709 DG |
660 | * Setup the outgoing data buffer for the response (llm) by allocating the |
661 | * right amount of memory and copying the original information from the lsm | |
662 | * structure. | |
ca95a216 | 663 | * |
d063d709 | 664 | * Return total size of the buffer pointed by buf. |
ca95a216 | 665 | */ |
5461b305 | 666 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 667 | { |
f3ed775e | 668 | int ret, buf_size; |
ca95a216 | 669 | |
f3ed775e | 670 | buf_size = size; |
5461b305 | 671 | |
ba7f0ae5 | 672 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 673 | if (cmd_ctx->llm == NULL) { |
76d7553f | 674 | PERROR("zmalloc"); |
5461b305 | 675 | ret = -ENOMEM; |
ca95a216 DG |
676 | goto error; |
677 | } | |
678 | ||
5461b305 DG |
679 | /* Copy common data */ |
680 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 681 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 682 | |
5461b305 DG |
683 | cmd_ctx->llm->data_size = size; |
684 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
685 | ||
ca95a216 DG |
686 | return buf_size; |
687 | ||
688 | error: | |
689 | return ret; | |
690 | } | |
691 | ||
7a485870 | 692 | /* |
5eb91c98 | 693 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 694 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 695 | */ |
5eb91c98 | 696 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 697 | { |
5eb91c98 | 698 | int ret; |
7a485870 DG |
699 | struct ltt_session *session; |
700 | struct ltt_kernel_channel *channel; | |
701 | ||
5eb91c98 | 702 | DBG("Updating kernel poll set"); |
7a485870 | 703 | |
54d01ffb | 704 | session_lock_list(); |
b5541356 | 705 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 706 | session_lock(session); |
7a485870 | 707 | if (session->kernel_session == NULL) { |
54d01ffb | 708 | session_unlock(session); |
7a485870 DG |
709 | continue; |
710 | } | |
7a485870 | 711 | |
54d01ffb DG |
712 | cds_list_for_each_entry(channel, |
713 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
714 | /* Add channel fd to the kernel poll set */ |
715 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
716 | if (ret < 0) { | |
54d01ffb | 717 | session_unlock(session); |
5eb91c98 DG |
718 | goto error; |
719 | } | |
720 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 721 | } |
54d01ffb | 722 | session_unlock(session); |
7a485870 | 723 | } |
54d01ffb | 724 | session_unlock_list(); |
7a485870 | 725 | |
5eb91c98 | 726 | return 0; |
7a485870 DG |
727 | |
728 | error: | |
54d01ffb | 729 | session_unlock_list(); |
7a485870 DG |
730 | return -1; |
731 | } | |
732 | ||
733 | /* | |
54d01ffb | 734 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 735 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 736 | * |
d063d709 | 737 | * Useful for CPU hotplug feature. |
7a485870 | 738 | */ |
2bdd86d4 | 739 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
740 | { |
741 | int ret = 0; | |
742 | struct ltt_session *session; | |
743 | struct ltt_kernel_channel *channel; | |
744 | ||
745 | DBG("Updating kernel streams for channel fd %d", fd); | |
746 | ||
54d01ffb | 747 | session_lock_list(); |
b5541356 | 748 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 749 | session_lock(session); |
7a485870 | 750 | if (session->kernel_session == NULL) { |
54d01ffb | 751 | session_unlock(session); |
7a485870 DG |
752 | continue; |
753 | } | |
d9800920 DG |
754 | |
755 | /* This is not suppose to be 0 but this is an extra security check */ | |
756 | if (session->kernel_session->consumer_fd == 0) { | |
3bd1e081 | 757 | session->kernel_session->consumer_fd = consumer_data->cmd_sock; |
d9800920 DG |
758 | } |
759 | ||
5eb91c98 DG |
760 | cds_list_for_each_entry(channel, |
761 | &session->kernel_session->channel_list.head, list) { | |
7a485870 DG |
762 | if (channel->fd == fd) { |
763 | DBG("Channel found, updating kernel streams"); | |
764 | ret = kernel_open_channel_stream(channel); | |
765 | if (ret < 0) { | |
b3c750d2 | 766 | goto error; |
7a485870 | 767 | } |
d9800920 | 768 | |
7a485870 | 769 | /* |
5eb91c98 DG |
770 | * Have we already sent fds to the consumer? If yes, it means |
771 | * that tracing is started so it is safe to send our updated | |
772 | * stream fds. | |
7a485870 | 773 | */ |
3bd1e081 | 774 | if (session->kernel_session->consumer_fds_sent == 1) { |
2bdd86d4 | 775 | ret = send_kconsumer_channel_streams(consumer_data, |
6df2e2c9 MD |
776 | session->kernel_session->consumer_fd, channel, |
777 | session->uid, session->gid); | |
7a485870 | 778 | if (ret < 0) { |
b3c750d2 | 779 | goto error; |
7a485870 DG |
780 | } |
781 | } | |
b3c750d2 | 782 | goto error; |
7a485870 DG |
783 | } |
784 | } | |
54d01ffb | 785 | session_unlock(session); |
7a485870 | 786 | } |
54d01ffb | 787 | session_unlock_list(); |
b3c750d2 | 788 | return ret; |
7a485870 | 789 | |
b3c750d2 | 790 | error: |
54d01ffb DG |
791 | session_unlock(session); |
792 | session_unlock_list(); | |
7a485870 DG |
793 | return ret; |
794 | } | |
795 | ||
487cf67c DG |
796 | /* |
797 | * For each tracing session, update newly registered apps. | |
798 | */ | |
799 | static void update_ust_app(int app_sock) | |
800 | { | |
801 | struct ltt_session *sess, *stmp; | |
802 | ||
4ee14516 DG |
803 | session_lock_list(); |
804 | ||
487cf67c DG |
805 | /* For all tracing session(s) */ |
806 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 807 | session_lock(sess); |
421cb601 DG |
808 | if (sess->ust_session) { |
809 | ust_app_global_update(sess->ust_session, app_sock); | |
810 | } | |
4ee14516 | 811 | session_unlock(sess); |
487cf67c | 812 | } |
4ee14516 DG |
813 | |
814 | session_unlock_list(); | |
487cf67c DG |
815 | } |
816 | ||
7a485870 | 817 | /* |
d063d709 | 818 | * This thread manage event coming from the kernel. |
7a485870 | 819 | * |
d063d709 DG |
820 | * Features supported in this thread: |
821 | * -) CPU Hotplug | |
7a485870 DG |
822 | */ |
823 | static void *thread_manage_kernel(void *data) | |
824 | { | |
5eb91c98 DG |
825 | int ret, i, pollfd, update_poll_flag = 1; |
826 | uint32_t revents, nb_fd; | |
7a485870 | 827 | char tmp; |
5eb91c98 | 828 | struct lttng_poll_event events; |
7a485870 DG |
829 | |
830 | DBG("Thread manage kernel started"); | |
831 | ||
5eb91c98 DG |
832 | ret = create_thread_poll_set(&events, 2); |
833 | if (ret < 0) { | |
76d7553f | 834 | goto error_poll_create; |
5eb91c98 DG |
835 | } |
836 | ||
837 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
838 | if (ret < 0) { | |
839 | goto error; | |
840 | } | |
841 | ||
7a485870 DG |
842 | while (1) { |
843 | if (update_poll_flag == 1) { | |
5f822d0a DG |
844 | /* |
845 | * Reset number of fd in the poll set. Always 2 since there is the thread | |
846 | * quit pipe and the kernel pipe. | |
847 | */ | |
848 | events.nb_fd = 2; | |
849 | ||
5eb91c98 DG |
850 | ret = update_kernel_poll(&events); |
851 | if (ret < 0) { | |
7a485870 DG |
852 | goto error; |
853 | } | |
854 | update_poll_flag = 0; | |
855 | } | |
856 | ||
5eb91c98 DG |
857 | nb_fd = LTTNG_POLL_GETNB(&events); |
858 | ||
859 | DBG("Thread kernel polling on %d fds", nb_fd); | |
860 | ||
861 | /* Zeroed the poll events */ | |
862 | lttng_poll_reset(&events); | |
7a485870 DG |
863 | |
864 | /* Poll infinite value of time */ | |
a8b0b341 | 865 | restart: |
5eb91c98 | 866 | ret = lttng_poll_wait(&events, -1); |
7a485870 | 867 | if (ret < 0) { |
a8b0b341 MD |
868 | /* |
869 | * Restart interrupted system call. | |
870 | */ | |
871 | if (errno == EINTR) { | |
872 | goto restart; | |
873 | } | |
7a485870 DG |
874 | goto error; |
875 | } else if (ret == 0) { | |
876 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
877 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
878 | "This should not have happened! Continuing..."); | |
7a485870 DG |
879 | continue; |
880 | } | |
881 | ||
5eb91c98 DG |
882 | for (i = 0; i < nb_fd; i++) { |
883 | /* Fetch once the poll data */ | |
884 | revents = LTTNG_POLL_GETEV(&events, i); | |
885 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 886 | |
5eb91c98 DG |
887 | /* Thread quit pipe has been closed. Killing thread. */ |
888 | ret = check_thread_quit_pipe(pollfd, revents); | |
889 | if (ret) { | |
890 | goto error; | |
891 | } | |
7a485870 | 892 | |
5eb91c98 DG |
893 | /* Check for data on kernel pipe */ |
894 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
895 | ret = read(kernel_poll_pipe[0], &tmp, 1); | |
896 | update_poll_flag = 1; | |
897 | continue; | |
898 | } else { | |
899 | /* | |
900 | * New CPU detected by the kernel. Adding kernel stream to | |
901 | * kernel session and updating the kernel consumer | |
902 | */ | |
903 | if (revents & LPOLLIN) { | |
2bdd86d4 | 904 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
905 | if (ret < 0) { |
906 | continue; | |
907 | } | |
908 | break; | |
909 | /* | |
910 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
911 | * and unregister kernel stream at this point. | |
912 | */ | |
7a485870 | 913 | } |
7a485870 DG |
914 | } |
915 | } | |
916 | } | |
917 | ||
918 | error: | |
5eb91c98 | 919 | lttng_poll_clean(&events); |
76d7553f MD |
920 | error_poll_create: |
921 | DBG("Kernel thread dying"); | |
7a485870 DG |
922 | return NULL; |
923 | } | |
924 | ||
1d4b027a | 925 | /* |
3bd1e081 | 926 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 927 | */ |
3bd1e081 | 928 | static void *thread_manage_consumer(void *data) |
1d4b027a | 929 | { |
76d7553f | 930 | int sock = -1, i, ret, pollfd; |
5eb91c98 | 931 | uint32_t revents, nb_fd; |
1d4b027a | 932 | enum lttcomm_return_code code; |
5eb91c98 | 933 | struct lttng_poll_event events; |
3bd1e081 | 934 | struct consumer_data *consumer_data = data; |
1d4b027a | 935 | |
3bd1e081 | 936 | DBG("[thread] Manage consumer started"); |
1d4b027a | 937 | |
3bd1e081 | 938 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); |
1d4b027a | 939 | if (ret < 0) { |
76d7553f | 940 | goto error_listen; |
1d4b027a DG |
941 | } |
942 | ||
5eb91c98 DG |
943 | /* |
944 | * Pass 2 as size here for the thread quit pipe and kconsumerd_err_sock. | |
945 | * Nothing more will be added to this poll set. | |
946 | */ | |
947 | ret = create_thread_poll_set(&events, 2); | |
948 | if (ret < 0) { | |
76d7553f | 949 | goto error_poll; |
5eb91c98 | 950 | } |
273ea72c | 951 | |
3bd1e081 | 952 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
953 | if (ret < 0) { |
954 | goto error; | |
955 | } | |
956 | ||
957 | nb_fd = LTTNG_POLL_GETNB(&events); | |
273ea72c DG |
958 | |
959 | /* Inifinite blocking call, waiting for transmission */ | |
a8b0b341 | 960 | restart: |
5eb91c98 | 961 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 962 | if (ret < 0) { |
a8b0b341 MD |
963 | /* |
964 | * Restart interrupted system call. | |
965 | */ | |
966 | if (errno == EINTR) { | |
967 | goto restart; | |
968 | } | |
273ea72c DG |
969 | goto error; |
970 | } | |
971 | ||
5eb91c98 DG |
972 | for (i = 0; i < nb_fd; i++) { |
973 | /* Fetch once the poll data */ | |
974 | revents = LTTNG_POLL_GETEV(&events, i); | |
975 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
976 | ||
977 | /* Thread quit pipe has been closed. Killing thread. */ | |
978 | ret = check_thread_quit_pipe(pollfd, revents); | |
979 | if (ret) { | |
980 | goto error; | |
981 | } | |
982 | ||
983 | /* Event on the registration socket */ | |
3bd1e081 | 984 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 985 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 986 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
987 | goto error; |
988 | } | |
989 | } | |
273ea72c DG |
990 | } |
991 | ||
3bd1e081 | 992 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
993 | if (sock < 0) { |
994 | goto error; | |
995 | } | |
996 | ||
3bd1e081 | 997 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 998 | |
712ea556 | 999 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1000 | ret = lttcomm_recv_unix_sock(sock, &code, |
1001 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1002 | if (ret <= 0) { |
1003 | goto error; | |
1004 | } | |
1005 | ||
3bd1e081 MD |
1006 | if (code == CONSUMERD_COMMAND_SOCK_READY) { |
1007 | consumer_data->cmd_sock = | |
1008 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
1009 | if (consumer_data->cmd_sock < 0) { | |
1010 | sem_post(&consumer_data->sem); | |
48842b30 | 1011 | PERROR("consumer connect"); |
1d4b027a DG |
1012 | goto error; |
1013 | } | |
1014 | /* Signal condition to tell that the kconsumerd is ready */ | |
3bd1e081 MD |
1015 | sem_post(&consumer_data->sem); |
1016 | DBG("consumer command socket ready"); | |
1d4b027a | 1017 | } else { |
3bd1e081 | 1018 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1019 | lttcomm_get_readable_code(-code)); |
1020 | goto error; | |
1021 | } | |
1022 | ||
54d01ffb | 1023 | /* Remove the kconsumerd error sock since we've established a connexion */ |
3bd1e081 | 1024 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1025 | if (ret < 0) { |
72079cae DG |
1026 | goto error; |
1027 | } | |
1028 | ||
5eb91c98 DG |
1029 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1030 | if (ret < 0) { | |
72079cae | 1031 | goto error; |
5eb91c98 DG |
1032 | } |
1033 | ||
1034 | /* Update number of fd */ | |
1035 | nb_fd = LTTNG_POLL_GETNB(&events); | |
1036 | ||
1037 | /* Inifinite blocking call, waiting for transmission */ | |
a8b0b341 | 1038 | restart_poll: |
5eb91c98 DG |
1039 | ret = lttng_poll_wait(&events, -1); |
1040 | if (ret < 0) { | |
a8b0b341 MD |
1041 | /* |
1042 | * Restart interrupted system call. | |
1043 | */ | |
1044 | if (errno == EINTR) { | |
1045 | goto restart_poll; | |
1046 | } | |
72079cae DG |
1047 | goto error; |
1048 | } | |
1049 | ||
5eb91c98 DG |
1050 | for (i = 0; i < nb_fd; i++) { |
1051 | /* Fetch once the poll data */ | |
1052 | revents = LTTNG_POLL_GETEV(&events, i); | |
1053 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1054 | ||
1055 | /* Thread quit pipe has been closed. Killing thread. */ | |
1056 | ret = check_thread_quit_pipe(pollfd, revents); | |
1057 | if (ret) { | |
1058 | goto error; | |
1059 | } | |
1060 | ||
1061 | /* Event on the kconsumerd socket */ | |
1062 | if (pollfd == sock) { | |
1063 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1064 | ERR("consumer err socket second poll error"); |
5eb91c98 DG |
1065 | goto error; |
1066 | } | |
1067 | } | |
1068 | } | |
1069 | ||
712ea556 | 1070 | /* Wait for any kconsumerd error */ |
54d01ffb DG |
1071 | ret = lttcomm_recv_unix_sock(sock, &code, |
1072 | sizeof(enum lttcomm_return_code)); | |
712ea556 | 1073 | if (ret <= 0) { |
3bd1e081 | 1074 | ERR("consumer closed the command socket"); |
712ea556 | 1075 | goto error; |
6f61d021 | 1076 | } |
1d4b027a | 1077 | |
3bd1e081 | 1078 | ERR("consumer return code : %s", lttcomm_get_readable_code(-code)); |
712ea556 | 1079 | |
1d4b027a | 1080 | error: |
76d7553f MD |
1081 | if (consumer_data->err_sock >= 0) { |
1082 | ret = close(consumer_data->err_sock); | |
1083 | if (ret) { | |
1084 | PERROR("close"); | |
1085 | } | |
1086 | } | |
1087 | if (consumer_data->cmd_sock >= 0) { | |
1088 | ret = close(consumer_data->cmd_sock); | |
1089 | if (ret) { | |
1090 | PERROR("close"); | |
1091 | } | |
1092 | } | |
1093 | if (sock >= 0) { | |
1094 | ret = close(sock); | |
1095 | if (ret) { | |
1096 | PERROR("close"); | |
1097 | } | |
1098 | } | |
273ea72c | 1099 | |
3bd1e081 MD |
1100 | unlink(consumer_data->err_unix_sock_path); |
1101 | unlink(consumer_data->cmd_unix_sock_path); | |
1102 | consumer_data->pid = 0; | |
1d4b027a | 1103 | |
5eb91c98 | 1104 | lttng_poll_clean(&events); |
76d7553f MD |
1105 | error_poll: |
1106 | error_listen: | |
1107 | DBG("consumer thread cleanup completed"); | |
0177d773 | 1108 | |
5eb91c98 | 1109 | return NULL; |
099e26bd DG |
1110 | } |
1111 | ||
099e26bd DG |
1112 | /* |
1113 | * This thread manage application communication. | |
1d4b027a DG |
1114 | */ |
1115 | static void *thread_manage_apps(void *data) | |
099e26bd | 1116 | { |
5eb91c98 DG |
1117 | int i, ret, pollfd; |
1118 | uint32_t revents, nb_fd; | |
099e26bd | 1119 | struct ust_command ust_cmd; |
5eb91c98 | 1120 | struct lttng_poll_event events; |
099e26bd DG |
1121 | |
1122 | DBG("[thread] Manage application started"); | |
1123 | ||
f6a9efaa DG |
1124 | rcu_register_thread(); |
1125 | rcu_thread_online(); | |
1126 | ||
5eb91c98 DG |
1127 | ret = create_thread_poll_set(&events, 2); |
1128 | if (ret < 0) { | |
76d7553f | 1129 | goto error_poll_create; |
5eb91c98 | 1130 | } |
099e26bd | 1131 | |
5eb91c98 DG |
1132 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1133 | if (ret < 0) { | |
1134 | goto error; | |
1135 | } | |
099e26bd | 1136 | |
5eb91c98 DG |
1137 | while (1) { |
1138 | /* Zeroed the events structure */ | |
1139 | lttng_poll_reset(&events); | |
0177d773 | 1140 | |
5eb91c98 | 1141 | nb_fd = LTTNG_POLL_GETNB(&events); |
099e26bd DG |
1142 | |
1143 | DBG("Apps thread polling on %d fds", nb_fd); | |
1144 | ||
1145 | /* Inifinite blocking call, waiting for transmission */ | |
a8b0b341 | 1146 | restart: |
5eb91c98 | 1147 | ret = lttng_poll_wait(&events, -1); |
099e26bd | 1148 | if (ret < 0) { |
a8b0b341 MD |
1149 | /* |
1150 | * Restart interrupted system call. | |
1151 | */ | |
1152 | if (errno == EINTR) { | |
1153 | goto restart; | |
1154 | } | |
099e26bd DG |
1155 | goto error; |
1156 | } | |
1157 | ||
5eb91c98 DG |
1158 | for (i = 0; i < nb_fd; i++) { |
1159 | /* Fetch once the poll data */ | |
1160 | revents = LTTNG_POLL_GETEV(&events, i); | |
1161 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1162 | ||
1163 | /* Thread quit pipe has been closed. Killing thread. */ | |
1164 | ret = check_thread_quit_pipe(pollfd, revents); | |
1165 | if (ret) { | |
099e26bd | 1166 | goto error; |
5eb91c98 | 1167 | } |
099e26bd | 1168 | |
5eb91c98 DG |
1169 | /* Inspect the apps cmd pipe */ |
1170 | if (pollfd == apps_cmd_pipe[0]) { | |
1171 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1172 | ERR("Apps command pipe error"); | |
0177d773 | 1173 | goto error; |
5eb91c98 DG |
1174 | } else if (revents & LPOLLIN) { |
1175 | /* Empty pipe */ | |
1176 | ret = read(apps_cmd_pipe[0], &ust_cmd, sizeof(ust_cmd)); | |
1177 | if (ret < 0 || ret < sizeof(ust_cmd)) { | |
76d7553f | 1178 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1179 | goto error; |
1180 | } | |
099e26bd | 1181 | |
5eb91c98 | 1182 | /* Register applicaton to the session daemon */ |
56fff090 | 1183 | ret = ust_app_register(&ust_cmd.reg_msg, |
54d01ffb | 1184 | ust_cmd.sock); |
88ff5b7f | 1185 | if (ret == -ENOMEM) { |
5eb91c98 | 1186 | goto error; |
88ff5b7f MD |
1187 | } else if (ret < 0) { |
1188 | break; | |
5eb91c98 DG |
1189 | } |
1190 | ||
acc7b41b | 1191 | /* |
e0c7ec2b | 1192 | * Validate UST version compatibility. |
acc7b41b | 1193 | */ |
e0c7ec2b DG |
1194 | ret = ust_app_validate_version(ust_cmd.sock); |
1195 | if (ret >= 0) { | |
1196 | /* | |
1197 | * Add channel(s) and event(s) to newly registered apps | |
1198 | * from lttng global UST domain. | |
1199 | */ | |
1200 | update_ust_app(ust_cmd.sock); | |
1201 | } | |
acc7b41b | 1202 | |
f2ca2e25 | 1203 | ret = ust_app_register_done(ust_cmd.sock); |
5eb91c98 DG |
1204 | if (ret < 0) { |
1205 | /* | |
1206 | * If the registration is not possible, we simply | |
1207 | * unregister the apps and continue | |
1208 | */ | |
56fff090 | 1209 | ust_app_unregister(ust_cmd.sock); |
5eb91c98 DG |
1210 | } else { |
1211 | /* | |
1212 | * We just need here to monitor the close of the UST | |
1213 | * socket and poll set monitor those by default. | |
ab08a675 MD |
1214 | * Listen on POLLIN (even if we never expect any |
1215 | * data) to ensure that hangup wakes us. | |
5eb91c98 | 1216 | */ |
ab08a675 | 1217 | ret = lttng_poll_add(&events, ust_cmd.sock, LPOLLIN); |
5eb91c98 DG |
1218 | if (ret < 0) { |
1219 | goto error; | |
1220 | } | |
1221 | ||
54d01ffb DG |
1222 | DBG("Apps with sock %d added to poll set", |
1223 | ust_cmd.sock); | |
5eb91c98 | 1224 | } |
487cf67c | 1225 | |
5eb91c98 | 1226 | break; |
0177d773 | 1227 | } |
5eb91c98 DG |
1228 | } else { |
1229 | /* | |
54d01ffb DG |
1230 | * At this point, we know that a registered application made |
1231 | * the event at poll_wait. | |
5eb91c98 DG |
1232 | */ |
1233 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1234 | /* Removing from the poll set */ | |
1235 | ret = lttng_poll_del(&events, pollfd); | |
1236 | if (ret < 0) { | |
1237 | goto error; | |
1238 | } | |
099e26bd | 1239 | |
b9d9b220 | 1240 | /* Socket closed on remote end. */ |
56fff090 | 1241 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1242 | break; |
1243 | } | |
099e26bd DG |
1244 | } |
1245 | } | |
099e26bd DG |
1246 | } |
1247 | ||
1248 | error: | |
5eb91c98 | 1249 | lttng_poll_clean(&events); |
76d7553f MD |
1250 | error_poll_create: |
1251 | DBG("Application communication apps thread cleanup complete"); | |
f6a9efaa DG |
1252 | rcu_thread_offline(); |
1253 | rcu_unregister_thread(); | |
099e26bd DG |
1254 | return NULL; |
1255 | } | |
1256 | ||
1257 | /* | |
1258 | * Dispatch request from the registration threads to the application | |
1259 | * communication thread. | |
1260 | */ | |
1261 | static void *thread_dispatch_ust_registration(void *data) | |
1262 | { | |
1263 | int ret; | |
1264 | struct cds_wfq_node *node; | |
1265 | struct ust_command *ust_cmd = NULL; | |
1266 | ||
1267 | DBG("[thread] Dispatch UST command started"); | |
1268 | ||
1269 | while (!dispatch_thread_exit) { | |
1270 | /* Atomically prepare the queue futex */ | |
1271 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1272 | ||
1273 | do { | |
1274 | /* Dequeue command for registration */ | |
1275 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1276 | if (node == NULL) { | |
00a17c97 | 1277 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1278 | /* Continue thread execution */ |
1279 | break; | |
1280 | } | |
1281 | ||
1282 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1283 | ||
2f50c8a3 DG |
1284 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1285 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1286 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1287 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1288 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1289 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
099e26bd DG |
1290 | /* |
1291 | * Inform apps thread of the new application registration. This | |
1292 | * call is blocking so we can be assured that the data will be read | |
1293 | * at some point in time or wait to the end of the world :) | |
1294 | */ | |
1295 | ret = write(apps_cmd_pipe[1], ust_cmd, | |
1296 | sizeof(struct ust_command)); | |
1297 | if (ret < 0) { | |
76d7553f | 1298 | PERROR("write apps cmd pipe"); |
099e26bd DG |
1299 | if (errno == EBADF) { |
1300 | /* | |
1301 | * We can't inform the application thread to process | |
1302 | * registration. We will exit or else application | |
1303 | * registration will not occur and tracing will never | |
1304 | * start. | |
1305 | */ | |
1306 | goto error; | |
1307 | } | |
1308 | } | |
1309 | free(ust_cmd); | |
1310 | } while (node != NULL); | |
1311 | ||
1312 | /* Futex wait on queue. Blocking call on futex() */ | |
1313 | futex_nto1_wait(&ust_cmd_queue.futex); | |
1314 | } | |
1315 | ||
1316 | error: | |
1317 | DBG("Dispatch thread dying"); | |
1318 | return NULL; | |
1319 | } | |
1320 | ||
1321 | /* | |
1322 | * This thread manage application registration. | |
1323 | */ | |
1324 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1325 | { |
a4b35e07 | 1326 | int sock = -1, i, ret, pollfd; |
5eb91c98 DG |
1327 | uint32_t revents, nb_fd; |
1328 | struct lttng_poll_event events; | |
099e26bd DG |
1329 | /* |
1330 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1331 | * freed in the manage apps thread. | |
1332 | */ | |
1333 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1334 | |
099e26bd | 1335 | DBG("[thread] Manage application registration started"); |
1d4b027a DG |
1336 | |
1337 | ret = lttcomm_listen_unix_sock(apps_sock); | |
1338 | if (ret < 0) { | |
76d7553f | 1339 | goto error_listen; |
1d4b027a DG |
1340 | } |
1341 | ||
5eb91c98 DG |
1342 | /* |
1343 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1344 | * more will be added to this poll set. | |
1345 | */ | |
1346 | ret = create_thread_poll_set(&events, 2); | |
1347 | if (ret < 0) { | |
76d7553f | 1348 | goto error_create_poll; |
5eb91c98 | 1349 | } |
273ea72c | 1350 | |
5eb91c98 DG |
1351 | /* Add the application registration socket */ |
1352 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1353 | if (ret < 0) { | |
76d7553f | 1354 | goto error_poll_add; |
5eb91c98 | 1355 | } |
273ea72c | 1356 | |
1d4b027a | 1357 | /* Notify all applications to register */ |
0fdd1e2c DG |
1358 | ret = notify_ust_apps(1); |
1359 | if (ret < 0) { | |
1360 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1361 | "Execution continues but there might be problem for already\n" |
1362 | "running applications that wishes to register."); | |
0fdd1e2c | 1363 | } |
1d4b027a DG |
1364 | |
1365 | while (1) { | |
1366 | DBG("Accepting application registration"); | |
273ea72c | 1367 | |
5eb91c98 DG |
1368 | nb_fd = LTTNG_POLL_GETNB(&events); |
1369 | ||
273ea72c | 1370 | /* Inifinite blocking call, waiting for transmission */ |
a8b0b341 | 1371 | restart: |
5eb91c98 | 1372 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 1373 | if (ret < 0) { |
a8b0b341 MD |
1374 | /* |
1375 | * Restart interrupted system call. | |
1376 | */ | |
1377 | if (errno == EINTR) { | |
1378 | goto restart; | |
1379 | } | |
273ea72c DG |
1380 | goto error; |
1381 | } | |
1382 | ||
5eb91c98 DG |
1383 | for (i = 0; i < nb_fd; i++) { |
1384 | /* Fetch once the poll data */ | |
1385 | revents = LTTNG_POLL_GETEV(&events, i); | |
1386 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1387 | |
5eb91c98 DG |
1388 | /* Thread quit pipe has been closed. Killing thread. */ |
1389 | ret = check_thread_quit_pipe(pollfd, revents); | |
1390 | if (ret) { | |
90014c57 DG |
1391 | goto error; |
1392 | } | |
1d4b027a | 1393 | |
5eb91c98 DG |
1394 | /* Event on the registration socket */ |
1395 | if (pollfd == apps_sock) { | |
1396 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1397 | ERR("Register apps socket poll error"); | |
1398 | goto error; | |
1399 | } else if (revents & LPOLLIN) { | |
1400 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1401 | if (sock < 0) { | |
1402 | goto error; | |
1403 | } | |
099e26bd | 1404 | |
5eb91c98 | 1405 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1406 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1407 | if (ust_cmd == NULL) { |
76d7553f | 1408 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
1409 | goto error; |
1410 | } | |
1d4b027a | 1411 | |
5eb91c98 DG |
1412 | /* |
1413 | * Using message-based transmissions to ensure we don't | |
1414 | * have to deal with partially received messages. | |
1415 | */ | |
1416 | ret = lttcomm_recv_unix_sock(sock, &ust_cmd->reg_msg, | |
1417 | sizeof(struct ust_register_msg)); | |
1418 | if (ret < 0 || ret < sizeof(struct ust_register_msg)) { | |
1419 | if (ret < 0) { | |
76d7553f | 1420 | PERROR("lttcomm_recv_unix_sock register apps"); |
5eb91c98 DG |
1421 | } else { |
1422 | ERR("Wrong size received on apps register"); | |
1423 | } | |
1424 | free(ust_cmd); | |
76d7553f MD |
1425 | ret = close(sock); |
1426 | if (ret) { | |
1427 | PERROR("close"); | |
1428 | } | |
1429 | sock = -1; | |
5eb91c98 DG |
1430 | continue; |
1431 | } | |
099e26bd | 1432 | |
5eb91c98 | 1433 | ust_cmd->sock = sock; |
099e26bd | 1434 | |
5eb91c98 DG |
1435 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1436 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1437 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1438 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1439 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1440 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1441 | |
5eb91c98 DG |
1442 | /* |
1443 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1444 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1445 | */ |
1446 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1447 | ||
1448 | /* | |
1449 | * Wake the registration queue futex. Implicit memory | |
1450 | * barrier with the exchange in cds_wfq_enqueue. | |
1451 | */ | |
1452 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1453 | } | |
1454 | } | |
90014c57 | 1455 | } |
1d4b027a DG |
1456 | } |
1457 | ||
1458 | error: | |
0fdd1e2c DG |
1459 | /* Notify that the registration thread is gone */ |
1460 | notify_ust_apps(0); | |
1461 | ||
a4b35e07 | 1462 | if (apps_sock >= 0) { |
76d7553f MD |
1463 | ret = close(apps_sock); |
1464 | if (ret) { | |
1465 | PERROR("close"); | |
1466 | } | |
a4b35e07 MD |
1467 | } |
1468 | if (clock >= 0) { | |
76d7553f MD |
1469 | ret = close(sock); |
1470 | if (ret) { | |
1471 | PERROR("close"); | |
1472 | } | |
a4b35e07 | 1473 | } |
273ea72c | 1474 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1475 | |
76d7553f | 1476 | error_poll_add: |
5eb91c98 | 1477 | lttng_poll_clean(&events); |
76d7553f MD |
1478 | error_listen: |
1479 | error_create_poll: | |
1480 | DBG("UST Registration thread cleanup complete"); | |
5eb91c98 | 1481 | |
1d4b027a DG |
1482 | return NULL; |
1483 | } | |
1484 | ||
8c0faa1d | 1485 | /* |
3bd1e081 | 1486 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1487 | * exec or it will fails. |
8c0faa1d | 1488 | */ |
3bd1e081 | 1489 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d DG |
1490 | { |
1491 | int ret; | |
ee0b0061 DG |
1492 | struct timespec timeout; |
1493 | ||
1494 | timeout.tv_sec = DEFAULT_SEM_WAIT_TIMEOUT; | |
1495 | timeout.tv_nsec = 0; | |
8c0faa1d DG |
1496 | |
1497 | /* Setup semaphore */ | |
3bd1e081 | 1498 | ret = sem_init(&consumer_data->sem, 0, 0); |
ee0b0061 | 1499 | if (ret < 0) { |
3bd1e081 | 1500 | PERROR("sem_init consumer semaphore"); |
ee0b0061 DG |
1501 | goto error; |
1502 | } | |
8c0faa1d | 1503 | |
3bd1e081 MD |
1504 | ret = pthread_create(&consumer_data->thread, NULL, |
1505 | thread_manage_consumer, consumer_data); | |
8c0faa1d | 1506 | if (ret != 0) { |
3bd1e081 | 1507 | PERROR("pthread_create consumer"); |
ee0b0061 | 1508 | ret = -1; |
8c0faa1d DG |
1509 | goto error; |
1510 | } | |
1511 | ||
ee0b0061 DG |
1512 | /* Get time for sem_timedwait absolute timeout */ |
1513 | ret = clock_gettime(CLOCK_REALTIME, &timeout); | |
1514 | if (ret < 0) { | |
3bd1e081 | 1515 | PERROR("clock_gettime spawn consumer"); |
ee0b0061 | 1516 | /* Infinite wait for the kconsumerd thread to be ready */ |
3bd1e081 | 1517 | ret = sem_wait(&consumer_data->sem); |
ee0b0061 DG |
1518 | } else { |
1519 | /* Normal timeout if the gettime was successful */ | |
1520 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
3bd1e081 | 1521 | ret = sem_timedwait(&consumer_data->sem, &timeout); |
ee0b0061 | 1522 | } |
8c0faa1d | 1523 | |
ee0b0061 DG |
1524 | if (ret < 0) { |
1525 | if (errno == ETIMEDOUT) { | |
1526 | /* | |
1527 | * Call has timed out so we kill the kconsumerd_thread and return | |
1528 | * an error. | |
1529 | */ | |
3bd1e081 MD |
1530 | ERR("The consumer thread was never ready. Killing it"); |
1531 | ret = pthread_cancel(consumer_data->thread); | |
ee0b0061 | 1532 | if (ret < 0) { |
3bd1e081 | 1533 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
1534 | } |
1535 | } else { | |
3bd1e081 | 1536 | PERROR("semaphore wait failed consumer thread"); |
ee0b0061 DG |
1537 | } |
1538 | goto error; | |
1539 | } | |
1540 | ||
3bd1e081 MD |
1541 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1542 | if (consumer_data->pid == 0) { | |
712ea556 | 1543 | ERR("Kconsumerd did not start"); |
3bd1e081 | 1544 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
1545 | goto error; |
1546 | } | |
3bd1e081 | 1547 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 1548 | |
8c0faa1d DG |
1549 | return 0; |
1550 | ||
1551 | error: | |
1552 | return ret; | |
1553 | } | |
1554 | ||
d9800920 | 1555 | /* |
3bd1e081 | 1556 | * Join consumer thread |
d9800920 | 1557 | */ |
3bd1e081 | 1558 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
1559 | { |
1560 | void *status; | |
1561 | int ret; | |
1562 | ||
3bd1e081 MD |
1563 | if (consumer_data->pid != 0) { |
1564 | ret = kill(consumer_data->pid, SIGTERM); | |
cf3af59e | 1565 | if (ret) { |
3bd1e081 | 1566 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
1567 | return ret; |
1568 | } | |
3bd1e081 | 1569 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
1570 | } else { |
1571 | return 0; | |
1572 | } | |
1573 | } | |
1574 | ||
8c0faa1d | 1575 | /* |
3bd1e081 | 1576 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 1577 | * |
d063d709 | 1578 | * Return pid if successful else -1. |
8c0faa1d | 1579 | */ |
3bd1e081 | 1580 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
1581 | { |
1582 | int ret; | |
1583 | pid_t pid; | |
94c55f17 | 1584 | const char *consumer_to_use; |
53086306 | 1585 | const char *verbosity; |
94c55f17 | 1586 | struct stat st; |
8c0faa1d | 1587 | |
3bd1e081 | 1588 | DBG("Spawning consumerd"); |
c49dc785 | 1589 | |
8c0faa1d DG |
1590 | pid = fork(); |
1591 | if (pid == 0) { | |
1592 | /* | |
3bd1e081 | 1593 | * Exec consumerd. |
8c0faa1d | 1594 | */ |
daee5345 | 1595 | if (opt_verbose_consumer) { |
53086306 DG |
1596 | verbosity = "--verbose"; |
1597 | } else { | |
1598 | verbosity = "--quiet"; | |
1599 | } | |
3bd1e081 MD |
1600 | switch (consumer_data->type) { |
1601 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 1602 | /* |
c7704d57 DG |
1603 | * Find out which consumerd to execute. We will first try the |
1604 | * 64-bit path, then the sessiond's installation directory, and | |
1605 | * fallback on the 32-bit one, | |
94c55f17 | 1606 | */ |
63a799e8 AM |
1607 | DBG3("Looking for a kernel consumer at these locations:"); |
1608 | DBG3(" 1) %s", consumerd64_bin); | |
1609 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
1610 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 1611 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 1612 | DBG3("Found location #1"); |
94c55f17 | 1613 | consumer_to_use = consumerd64_bin; |
94c55f17 | 1614 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 1615 | DBG3("Found location #2"); |
94c55f17 | 1616 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 1617 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 1618 | DBG3("Found location #3"); |
eb1e0bd4 | 1619 | consumer_to_use = consumerd32_bin; |
94c55f17 | 1620 | } else { |
63a799e8 | 1621 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
1622 | break; |
1623 | } | |
1624 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
1625 | execl(consumer_to_use, | |
1626 | "lttng-consumerd", verbosity, "-k", | |
1627 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
1628 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1629 | NULL); | |
3bd1e081 | 1630 | break; |
7753dea8 MD |
1631 | case LTTNG_CONSUMER64_UST: |
1632 | { | |
b1e0b6b6 | 1633 | char *tmpnew = NULL; |
8f4905da MD |
1634 | |
1635 | if (consumerd64_libdir[0] != '\0') { | |
1636 | char *tmp; | |
1637 | size_t tmplen; | |
1638 | ||
1639 | tmp = getenv("LD_LIBRARY_PATH"); | |
1640 | if (!tmp) { | |
1641 | tmp = ""; | |
1642 | } | |
1643 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1644 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
1645 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1646 | if (!tmpnew) { | |
1647 | ret = -ENOMEM; | |
1648 | goto error; | |
1649 | } | |
1650 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1651 | strcat(tmpnew, consumerd64_libdir); | |
1652 | if (tmp[0] != '\0') { | |
1653 | strcat(tmpnew, ":"); | |
1654 | strcat(tmpnew, tmp); | |
1655 | } | |
1656 | ret = putenv(tmpnew); | |
1657 | if (ret) { | |
1658 | ret = -errno; | |
1659 | goto error; | |
1660 | } | |
1661 | } | |
94c55f17 | 1662 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 1663 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1664 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1665 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1666 | NULL); | |
8f4905da MD |
1667 | if (consumerd64_libdir[0] != '\0') { |
1668 | free(tmpnew); | |
1669 | } | |
1670 | if (ret) { | |
1671 | goto error; | |
1672 | } | |
3bd1e081 | 1673 | break; |
7753dea8 MD |
1674 | } |
1675 | case LTTNG_CONSUMER32_UST: | |
1676 | { | |
937dde8e | 1677 | char *tmpnew = NULL; |
8f4905da MD |
1678 | |
1679 | if (consumerd32_libdir[0] != '\0') { | |
1680 | char *tmp; | |
1681 | size_t tmplen; | |
1682 | ||
1683 | tmp = getenv("LD_LIBRARY_PATH"); | |
1684 | if (!tmp) { | |
1685 | tmp = ""; | |
1686 | } | |
1687 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1688 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
1689 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1690 | if (!tmpnew) { | |
1691 | ret = -ENOMEM; | |
1692 | goto error; | |
1693 | } | |
1694 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1695 | strcat(tmpnew, consumerd32_libdir); | |
1696 | if (tmp[0] != '\0') { | |
1697 | strcat(tmpnew, ":"); | |
1698 | strcat(tmpnew, tmp); | |
1699 | } | |
1700 | ret = putenv(tmpnew); | |
1701 | if (ret) { | |
1702 | ret = -errno; | |
1703 | goto error; | |
1704 | } | |
1705 | } | |
94c55f17 | 1706 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 1707 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1708 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1709 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1710 | NULL); | |
8f4905da MD |
1711 | if (consumerd32_libdir[0] != '\0') { |
1712 | free(tmpnew); | |
1713 | } | |
1714 | if (ret) { | |
1715 | goto error; | |
1716 | } | |
7753dea8 MD |
1717 | break; |
1718 | } | |
3bd1e081 | 1719 | default: |
76d7553f | 1720 | PERROR("unknown consumer type"); |
3bd1e081 MD |
1721 | exit(EXIT_FAILURE); |
1722 | } | |
8c0faa1d | 1723 | if (errno != 0) { |
76d7553f | 1724 | PERROR("kernel start consumer exec"); |
8c0faa1d DG |
1725 | } |
1726 | exit(EXIT_FAILURE); | |
1727 | } else if (pid > 0) { | |
1728 | ret = pid; | |
8c0faa1d | 1729 | } else { |
76d7553f | 1730 | PERROR("start consumer fork"); |
8c0faa1d | 1731 | ret = -errno; |
8c0faa1d | 1732 | } |
8f4905da | 1733 | error: |
8c0faa1d DG |
1734 | return ret; |
1735 | } | |
1736 | ||
693bd40b | 1737 | /* |
3bd1e081 | 1738 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 1739 | */ |
3bd1e081 | 1740 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b DG |
1741 | { |
1742 | int ret; | |
1743 | ||
3bd1e081 MD |
1744 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1745 | if (consumer_data->pid != 0) { | |
1746 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
1747 | goto end; |
1748 | } | |
693bd40b | 1749 | |
3bd1e081 | 1750 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 1751 | if (ret < 0) { |
3bd1e081 MD |
1752 | ERR("Spawning consumerd failed"); |
1753 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 1754 | goto error; |
693bd40b | 1755 | } |
c49dc785 | 1756 | |
3bd1e081 MD |
1757 | /* Setting up the consumer_data pid */ |
1758 | consumer_data->pid = ret; | |
48842b30 | 1759 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 1760 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 1761 | |
3bd1e081 MD |
1762 | DBG2("Spawning consumer control thread"); |
1763 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 1764 | if (ret < 0) { |
3bd1e081 | 1765 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
1766 | goto error; |
1767 | } | |
1768 | ||
c49dc785 | 1769 | end: |
693bd40b DG |
1770 | return 0; |
1771 | ||
1772 | error: | |
1773 | return ret; | |
1774 | } | |
1775 | ||
b73401da | 1776 | /* |
096102bd | 1777 | * Check version of the lttng-modules. |
b73401da | 1778 | */ |
096102bd | 1779 | static int validate_lttng_modules_version(void) |
b73401da | 1780 | { |
096102bd | 1781 | return kernel_validate_version(kernel_tracer_fd); |
ab147185 MD |
1782 | } |
1783 | ||
b73401da | 1784 | /* |
096102bd | 1785 | * Setup necessary data for kernel tracer action. |
b73401da | 1786 | */ |
096102bd | 1787 | static int init_kernel_tracer(void) |
b73401da DG |
1788 | { |
1789 | int ret; | |
b73401da | 1790 | |
096102bd DG |
1791 | /* Modprobe lttng kernel modules */ |
1792 | ret = modprobe_lttng_control(); | |
b73401da | 1793 | if (ret < 0) { |
b73401da DG |
1794 | goto error; |
1795 | } | |
1796 | ||
096102bd DG |
1797 | /* Open debugfs lttng */ |
1798 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
1799 | if (kernel_tracer_fd < 0) { | |
1800 | DBG("Failed to open %s", module_proc_lttng); | |
1801 | ret = -1; | |
1802 | goto error_open; | |
b73401da DG |
1803 | } |
1804 | ||
096102bd DG |
1805 | /* Validate kernel version */ |
1806 | ret = validate_lttng_modules_version(); | |
b73401da | 1807 | if (ret < 0) { |
096102bd | 1808 | goto error_version; |
b73401da DG |
1809 | } |
1810 | ||
096102bd | 1811 | ret = modprobe_lttng_data(); |
b73401da | 1812 | if (ret < 0) { |
096102bd | 1813 | goto error_modules; |
8c0faa1d DG |
1814 | } |
1815 | ||
f3ed775e | 1816 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
096102bd DG |
1817 | return 0; |
1818 | ||
1819 | error_version: | |
1820 | modprobe_remove_lttng_control(); | |
76d7553f MD |
1821 | ret = close(kernel_tracer_fd); |
1822 | if (ret) { | |
1823 | PERROR("close"); | |
1824 | } | |
1825 | kernel_tracer_fd = -1; | |
096102bd DG |
1826 | return LTTCOMM_KERN_VERSION; |
1827 | ||
1828 | error_modules: | |
76d7553f MD |
1829 | ret = close(kernel_tracer_fd); |
1830 | if (ret) { | |
1831 | PERROR("close"); | |
1832 | } | |
096102bd DG |
1833 | |
1834 | error_open: | |
1835 | modprobe_remove_lttng_control(); | |
b73401da DG |
1836 | |
1837 | error: | |
b73401da | 1838 | WARN("No kernel tracer available"); |
a4b35e07 | 1839 | kernel_tracer_fd = -1; |
096102bd | 1840 | return LTTCOMM_KERN_NA; |
f3ed775e | 1841 | } |
33a2b854 | 1842 | |
f3ed775e | 1843 | /* |
54d01ffb | 1844 | * Init tracing by creating trace directory and sending fds kernel consumer. |
f3ed775e | 1845 | */ |
54d01ffb | 1846 | static int init_kernel_tracing(struct ltt_kernel_session *session) |
f3ed775e | 1847 | { |
f40799e8 | 1848 | int ret = 0; |
8c0faa1d | 1849 | |
3bd1e081 | 1850 | if (session->consumer_fds_sent == 0) { |
d9800920 | 1851 | /* |
54d01ffb DG |
1852 | * Assign default kernel consumer socket if no consumer assigned to the |
1853 | * kernel session. At this point, it's NOT suppose to be 0 but this is | |
1854 | * an extra security check. | |
d9800920 DG |
1855 | */ |
1856 | if (session->consumer_fd == 0) { | |
3bd1e081 | 1857 | session->consumer_fd = kconsumer_data.cmd_sock; |
d9800920 DG |
1858 | } |
1859 | ||
2bdd86d4 | 1860 | ret = send_kconsumer_session_streams(&kconsumer_data, session); |
f3ed775e | 1861 | if (ret < 0) { |
f3ed775e DG |
1862 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
1863 | goto error; | |
1864 | } | |
1d4b027a | 1865 | |
3bd1e081 | 1866 | session->consumer_fds_sent = 1; |
f3ed775e | 1867 | } |
1d4b027a DG |
1868 | |
1869 | error: | |
1870 | return ret; | |
8c0faa1d DG |
1871 | } |
1872 | ||
0177d773 DG |
1873 | /* |
1874 | * Create an UST session and add it to the session ust list. | |
1875 | */ | |
44d3bd01 | 1876 | static int create_ust_session(struct ltt_session *session, |
6df2e2c9 | 1877 | struct lttng_domain *domain) |
0177d773 | 1878 | { |
13384287 | 1879 | struct ltt_ust_session *lus = NULL; |
6df2e2c9 | 1880 | int ret; |
44d3bd01 DG |
1881 | |
1882 | switch (domain->type) { | |
48842b30 | 1883 | case LTTNG_DOMAIN_UST: |
44d3bd01 DG |
1884 | break; |
1885 | default: | |
13384287 | 1886 | ret = LTTCOMM_UNKNOWN_DOMAIN; |
44d3bd01 DG |
1887 | goto error; |
1888 | } | |
0177d773 DG |
1889 | |
1890 | DBG("Creating UST session"); | |
1891 | ||
a991f516 | 1892 | lus = trace_ust_create_session(session->path, session->id, domain); |
0177d773 | 1893 | if (lus == NULL) { |
44d3bd01 | 1894 | ret = LTTCOMM_UST_SESS_FAIL; |
0177d773 DG |
1895 | goto error; |
1896 | } | |
1897 | ||
e11d277b | 1898 | ret = run_as_mkdir_recursive(lus->pathname, S_IRWXU | S_IRWXG, |
6df2e2c9 | 1899 | session->uid, session->gid); |
0177d773 DG |
1900 | if (ret < 0) { |
1901 | if (ret != -EEXIST) { | |
1902 | ERR("Trace directory creation error"); | |
44d3bd01 | 1903 | ret = LTTCOMM_UST_SESS_FAIL; |
0177d773 DG |
1904 | goto error; |
1905 | } | |
1906 | } | |
1907 | ||
f6a9efaa DG |
1908 | /* The domain type dictate different actions on session creation */ |
1909 | switch (domain->type) { | |
48842b30 DG |
1910 | case LTTNG_DOMAIN_UST: |
1911 | /* No ustctl for the global UST domain */ | |
1912 | break; | |
1913 | default: | |
36dc12cc | 1914 | ERR("Unknown UST domain on create session %d", domain->type); |
48842b30 | 1915 | goto error; |
0177d773 | 1916 | } |
6df2e2c9 MD |
1917 | lus->uid = session->uid; |
1918 | lus->gid = session->gid; | |
f6a9efaa | 1919 | session->ust_session = lus; |
44d3bd01 DG |
1920 | |
1921 | return LTTCOMM_OK; | |
0177d773 DG |
1922 | |
1923 | error: | |
1924 | free(lus); | |
1925 | return ret; | |
1926 | } | |
1927 | ||
333f285e | 1928 | /* |
d063d709 | 1929 | * Create a kernel tracer session then create the default channel. |
333f285e | 1930 | */ |
6df2e2c9 | 1931 | static int create_kernel_session(struct ltt_session *session) |
333f285e | 1932 | { |
f3ed775e | 1933 | int ret; |
f3ed775e DG |
1934 | |
1935 | DBG("Creating kernel session"); | |
1936 | ||
1937 | ret = kernel_create_session(session, kernel_tracer_fd); | |
1938 | if (ret < 0) { | |
1939 | ret = LTTCOMM_KERN_SESS_FAIL; | |
1940 | goto error; | |
333f285e DG |
1941 | } |
1942 | ||
d9800920 | 1943 | /* Set kernel consumer socket fd */ |
3bd1e081 MD |
1944 | if (kconsumer_data.cmd_sock) { |
1945 | session->kernel_session->consumer_fd = kconsumer_data.cmd_sock; | |
d9800920 DG |
1946 | } |
1947 | ||
e11d277b | 1948 | ret = run_as_mkdir_recursive(session->kernel_session->trace_path, |
6df2e2c9 | 1949 | S_IRWXU | S_IRWXG, session->uid, session->gid); |
7a485870 | 1950 | if (ret < 0) { |
996b65c8 | 1951 | if (ret != -EEXIST) { |
7a485870 DG |
1952 | ERR("Trace directory creation error"); |
1953 | goto error; | |
1954 | } | |
1955 | } | |
6df2e2c9 MD |
1956 | session->kernel_session->uid = session->uid; |
1957 | session->kernel_session->gid = session->gid; | |
7a485870 | 1958 | |
f3ed775e DG |
1959 | error: |
1960 | return ret; | |
333f285e DG |
1961 | } |
1962 | ||
8e0af1b4 | 1963 | /* |
c7704d57 DG |
1964 | * Check if the UID or GID match the session. Root user has access to all |
1965 | * sessions. | |
8e0af1b4 | 1966 | */ |
c7704d57 | 1967 | static int session_access_ok(struct ltt_session *session, uid_t uid, gid_t gid) |
8e0af1b4 | 1968 | { |
c7704d57 | 1969 | if (uid != session->uid && gid != session->gid && uid != 0) { |
8e0af1b4 MD |
1970 | return 0; |
1971 | } else { | |
1972 | return 1; | |
1973 | } | |
1974 | } | |
1975 | ||
1976 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
1977 | { | |
1978 | unsigned int i = 0; | |
1979 | struct ltt_session *session; | |
1980 | ||
1981 | DBG("Counting number of available session for UID %d GID %d", | |
1982 | uid, gid); | |
1983 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
1984 | /* | |
1985 | * Only list the sessions the user can control. | |
1986 | */ | |
1987 | if (!session_access_ok(session, uid, gid)) { | |
1988 | continue; | |
1989 | } | |
1990 | i++; | |
1991 | } | |
1992 | return i; | |
1993 | } | |
1994 | ||
6c9cc2ab DG |
1995 | /* |
1996 | * Using the session list, filled a lttng_session array to send back to the | |
1997 | * client for session listing. | |
1998 | * | |
1999 | * The session list lock MUST be acquired before calling this function. Use | |
54d01ffb | 2000 | * session_lock_list() and session_unlock_list(). |
6c9cc2ab | 2001 | */ |
c7704d57 DG |
2002 | static void list_lttng_sessions(struct lttng_session *sessions, uid_t uid, |
2003 | gid_t gid) | |
6c9cc2ab | 2004 | { |
8e0af1b4 | 2005 | unsigned int i = 0; |
6c9cc2ab DG |
2006 | struct ltt_session *session; |
2007 | ||
8e0af1b4 MD |
2008 | DBG("Getting all available session for UID %d GID %d", |
2009 | uid, gid); | |
6c9cc2ab DG |
2010 | /* |
2011 | * Iterate over session list and append data after the control struct in | |
2012 | * the buffer. | |
2013 | */ | |
2014 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
8e0af1b4 MD |
2015 | /* |
2016 | * Only list the sessions the user can control. | |
2017 | */ | |
2018 | if (!session_access_ok(session, uid, gid)) { | |
2019 | continue; | |
2020 | } | |
6c9cc2ab | 2021 | strncpy(sessions[i].path, session->path, PATH_MAX); |
99497cd0 | 2022 | sessions[i].path[PATH_MAX - 1] = '\0'; |
6c9cc2ab | 2023 | strncpy(sessions[i].name, session->name, NAME_MAX); |
99497cd0 | 2024 | sessions[i].name[NAME_MAX - 1] = '\0'; |
464dd62d | 2025 | sessions[i].enabled = session->enabled; |
6c9cc2ab DG |
2026 | i++; |
2027 | } | |
2028 | } | |
2029 | ||
9f19cc17 DG |
2030 | /* |
2031 | * Fill lttng_channel array of all channels. | |
2032 | */ | |
b551a063 | 2033 | static void list_lttng_channels(int domain, struct ltt_session *session, |
9f19cc17 DG |
2034 | struct lttng_channel *channels) |
2035 | { | |
2036 | int i = 0; | |
2037 | struct ltt_kernel_channel *kchan; | |
2038 | ||
2039 | DBG("Listing channels for session %s", session->name); | |
2040 | ||
b551a063 DG |
2041 | switch (domain) { |
2042 | case LTTNG_DOMAIN_KERNEL: | |
2043 | /* Kernel channels */ | |
2044 | if (session->kernel_session != NULL) { | |
2045 | cds_list_for_each_entry(kchan, | |
2046 | &session->kernel_session->channel_list.head, list) { | |
2047 | /* Copy lttng_channel struct to array */ | |
2048 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
2049 | channels[i].enabled = kchan->enabled; | |
2050 | i++; | |
2051 | } | |
2052 | } | |
2053 | break; | |
2054 | case LTTNG_DOMAIN_UST: | |
2055 | { | |
bec39940 | 2056 | struct lttng_ht_iter iter; |
b551a063 DG |
2057 | struct ltt_ust_channel *uchan; |
2058 | ||
bec39940 DG |
2059 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
2060 | &iter.iter, uchan, node.node) { | |
b551a063 DG |
2061 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); |
2062 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
2063 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
2064 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
2065 | channels[i].attr.switch_timer_interval = | |
2066 | uchan->attr.switch_timer_interval; | |
2067 | channels[i].attr.read_timer_interval = | |
2068 | uchan->attr.read_timer_interval; | |
aea829b3 | 2069 | channels[i].enabled = uchan->enabled; |
5edd7e09 DG |
2070 | switch (uchan->attr.output) { |
2071 | case LTTNG_UST_MMAP: | |
2072 | default: | |
2073 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
2074 | break; | |
2075 | } | |
befe0905 | 2076 | i++; |
b551a063 DG |
2077 | } |
2078 | break; | |
2079 | } | |
2080 | default: | |
2081 | break; | |
2082 | } | |
2083 | } | |
2084 | ||
2085 | /* | |
2086 | * Create a list of ust global domain events. | |
2087 | */ | |
2088 | static int list_lttng_ust_global_events(char *channel_name, | |
2089 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
2090 | { | |
2091 | int i = 0, ret = 0; | |
2092 | unsigned int nb_event = 0; | |
bec39940 DG |
2093 | struct lttng_ht_iter iter; |
2094 | struct lttng_ht_node_str *node; | |
b551a063 DG |
2095 | struct ltt_ust_channel *uchan; |
2096 | struct ltt_ust_event *uevent; | |
2097 | struct lttng_event *tmp; | |
2098 | ||
2099 | DBG("Listing UST global events for channel %s", channel_name); | |
2100 | ||
2101 | rcu_read_lock(); | |
2102 | ||
bec39940 DG |
2103 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); |
2104 | node = lttng_ht_iter_get_node_str(&iter); | |
d7b75b30 DG |
2105 | if (node == NULL) { |
2106 | ret = -LTTCOMM_UST_CHAN_NOT_FOUND; | |
2107 | goto error; | |
b551a063 DG |
2108 | } |
2109 | ||
bec39940 | 2110 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); |
d7b75b30 | 2111 | |
bec39940 | 2112 | nb_event += lttng_ht_get_count(uchan->events); |
d7b75b30 | 2113 | |
b551a063 DG |
2114 | if (nb_event == 0) { |
2115 | ret = nb_event; | |
2116 | goto error; | |
2117 | } | |
2118 | ||
2119 | DBG3("Listing UST global %d events", nb_event); | |
2120 | ||
2121 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
2122 | if (tmp == NULL) { | |
2123 | ret = -LTTCOMM_FATAL; | |
2124 | goto error; | |
2125 | } | |
2126 | ||
bec39940 | 2127 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
d7b75b30 DG |
2128 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); |
2129 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
2130 | tmp[i].enabled = uevent->enabled; | |
2131 | switch (uevent->attr.instrumentation) { | |
2132 | case LTTNG_UST_TRACEPOINT: | |
2133 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
2134 | break; | |
2135 | case LTTNG_UST_PROBE: | |
2136 | tmp[i].type = LTTNG_EVENT_PROBE; | |
2137 | break; | |
2138 | case LTTNG_UST_FUNCTION: | |
2139 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
2140 | break; | |
0cda4f28 | 2141 | } |
8005f29a | 2142 | tmp[i].loglevel = uevent->attr.loglevel; |
0cda4f28 | 2143 | switch (uevent->attr.loglevel_type) { |
8005f29a | 2144 | case LTTNG_UST_LOGLEVEL_ALL: |
22e25b71 | 2145 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
0cda4f28 | 2146 | break; |
8005f29a | 2147 | case LTTNG_UST_LOGLEVEL_RANGE: |
22e25b71 | 2148 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; |
8005f29a MD |
2149 | break; |
2150 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
22e25b71 | 2151 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; |
ac3bd9c0 | 2152 | break; |
9f19cc17 | 2153 | } |
d7b75b30 | 2154 | i++; |
9f19cc17 DG |
2155 | } |
2156 | ||
b551a063 DG |
2157 | ret = nb_event; |
2158 | *events = tmp; | |
2159 | ||
2160 | error: | |
2161 | rcu_read_unlock(); | |
2162 | return ret; | |
9f19cc17 DG |
2163 | } |
2164 | ||
2165 | /* | |
b551a063 | 2166 | * Fill lttng_event array of all kernel events in the channel. |
9f19cc17 | 2167 | */ |
b551a063 DG |
2168 | static int list_lttng_kernel_events(char *channel_name, |
2169 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
9f19cc17 | 2170 | { |
b551a063 DG |
2171 | int i = 0, ret; |
2172 | unsigned int nb_event; | |
9f19cc17 | 2173 | struct ltt_kernel_event *event; |
b551a063 DG |
2174 | struct ltt_kernel_channel *kchan; |
2175 | ||
2176 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
2177 | if (kchan == NULL) { | |
2178 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2179 | goto error; | |
2180 | } | |
2181 | ||
2182 | nb_event = kchan->event_count; | |
9f19cc17 DG |
2183 | |
2184 | DBG("Listing events for channel %s", kchan->channel->name); | |
2185 | ||
b551a063 DG |
2186 | if (nb_event == 0) { |
2187 | ret = nb_event; | |
2188 | goto error; | |
2189 | } | |
2190 | ||
2191 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
2192 | if (*events == NULL) { | |
2193 | ret = LTTCOMM_FATAL; | |
2194 | goto error; | |
2195 | } | |
2196 | ||
9f19cc17 DG |
2197 | /* Kernel channels */ |
2198 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
b551a063 DG |
2199 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); |
2200 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
2201 | (*events)[i].enabled = event->enabled; | |
9f19cc17 DG |
2202 | switch (event->event->instrumentation) { |
2203 | case LTTNG_KERNEL_TRACEPOINT: | |
b551a063 | 2204 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; |
9f19cc17 DG |
2205 | break; |
2206 | case LTTNG_KERNEL_KPROBE: | |
2207 | case LTTNG_KERNEL_KRETPROBE: | |
b551a063 DG |
2208 | (*events)[i].type = LTTNG_EVENT_PROBE; |
2209 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
9f19cc17 DG |
2210 | sizeof(struct lttng_kernel_kprobe)); |
2211 | break; | |
2212 | case LTTNG_KERNEL_FUNCTION: | |
b551a063 DG |
2213 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
2214 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
9f19cc17 DG |
2215 | sizeof(struct lttng_kernel_function)); |
2216 | break; | |
0133c199 | 2217 | case LTTNG_KERNEL_NOOP: |
b551a063 | 2218 | (*events)[i].type = LTTNG_EVENT_NOOP; |
0133c199 | 2219 | break; |
a54bd42d | 2220 | case LTTNG_KERNEL_SYSCALL: |
b551a063 | 2221 | (*events)[i].type = LTTNG_EVENT_SYSCALL; |
0133c199 | 2222 | break; |
7a3d1328 MD |
2223 | case LTTNG_KERNEL_ALL: |
2224 | assert(0); | |
2225 | break; | |
9f19cc17 DG |
2226 | } |
2227 | i++; | |
2228 | } | |
b551a063 DG |
2229 | |
2230 | return nb_event; | |
2231 | ||
2232 | error: | |
2233 | return ret; | |
9f19cc17 DG |
2234 | } |
2235 | ||
fac6795d | 2236 | /* |
54d01ffb | 2237 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. |
fac6795d | 2238 | */ |
54d01ffb DG |
2239 | static int cmd_disable_channel(struct ltt_session *session, |
2240 | int domain, char *channel_name) | |
fac6795d | 2241 | { |
54d01ffb | 2242 | int ret; |
78f0bacd DG |
2243 | struct ltt_ust_session *usess; |
2244 | ||
2245 | usess = session->ust_session; | |
379473d2 | 2246 | |
54d01ffb | 2247 | switch (domain) { |
78f0bacd DG |
2248 | case LTTNG_DOMAIN_KERNEL: |
2249 | { | |
2250 | ret = channel_kernel_disable(session->kernel_session, | |
2251 | channel_name); | |
2252 | if (ret != LTTCOMM_OK) { | |
2253 | goto error; | |
2254 | } | |
54d01ffb | 2255 | |
78f0bacd DG |
2256 | kernel_wait_quiescent(kernel_tracer_fd); |
2257 | break; | |
2258 | } | |
2259 | case LTTNG_DOMAIN_UST: | |
2260 | { | |
2261 | struct ltt_ust_channel *uchan; | |
bec39940 | 2262 | struct lttng_ht *chan_ht; |
78f0bacd | 2263 | |
7885e399 DG |
2264 | chan_ht = usess->domain_global.channels; |
2265 | ||
2266 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
78f0bacd DG |
2267 | if (uchan == NULL) { |
2268 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
54d01ffb | 2269 | goto error; |
78f0bacd DG |
2270 | } |
2271 | ||
7885e399 DG |
2272 | ret = channel_ust_disable(usess, domain, uchan); |
2273 | if (ret != LTTCOMM_OK) { | |
78f0bacd DG |
2274 | goto error; |
2275 | } | |
78f0bacd DG |
2276 | break; |
2277 | } | |
d78d6610 | 2278 | #if 0 |
78f0bacd DG |
2279 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: |
2280 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
2281 | case LTTNG_DOMAIN_UST_PID: | |
d78d6610 | 2282 | #endif |
78f0bacd DG |
2283 | default: |
2284 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2285 | goto error; | |
20fe2104 DG |
2286 | } |
2287 | ||
54d01ffb | 2288 | ret = LTTCOMM_OK; |
d65106b1 | 2289 | |
54d01ffb DG |
2290 | error: |
2291 | return ret; | |
2292 | } | |
2293 | ||
2294 | /* | |
2295 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
2296 | */ | |
44d3bd01 | 2297 | static int cmd_enable_channel(struct ltt_session *session, |
aea829b3 | 2298 | int domain, struct lttng_channel *attr) |
54d01ffb DG |
2299 | { |
2300 | int ret; | |
f6a9efaa | 2301 | struct ltt_ust_session *usess = session->ust_session; |
bec39940 | 2302 | struct lttng_ht *chan_ht; |
f6a9efaa | 2303 | |
5d56b5aa | 2304 | DBG("Enabling channel %s for session %s", attr->name, session->name); |
d65106b1 | 2305 | |
aea829b3 | 2306 | switch (domain) { |
44d3bd01 DG |
2307 | case LTTNG_DOMAIN_KERNEL: |
2308 | { | |
2309 | struct ltt_kernel_channel *kchan; | |
54d01ffb | 2310 | |
44d3bd01 DG |
2311 | kchan = trace_kernel_get_channel_by_name(attr->name, |
2312 | session->kernel_session); | |
2313 | if (kchan == NULL) { | |
2314 | ret = channel_kernel_create(session->kernel_session, | |
2315 | attr, kernel_poll_pipe[1]); | |
2316 | } else { | |
2317 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
2318 | } | |
2319 | ||
2320 | if (ret != LTTCOMM_OK) { | |
2321 | goto error; | |
2322 | } | |
2323 | ||
2324 | kernel_wait_quiescent(kernel_tracer_fd); | |
2325 | break; | |
2326 | } | |
f6a9efaa DG |
2327 | case LTTNG_DOMAIN_UST: |
2328 | { | |
2329 | struct ltt_ust_channel *uchan; | |
2330 | ||
7885e399 | 2331 | chan_ht = usess->domain_global.channels; |
f6a9efaa | 2332 | |
7885e399 | 2333 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); |
f6a9efaa | 2334 | if (uchan == NULL) { |
7885e399 | 2335 | ret = channel_ust_create(usess, domain, attr); |
f6a9efaa | 2336 | } else { |
7885e399 | 2337 | ret = channel_ust_enable(usess, domain, uchan); |
48842b30 | 2338 | } |
f6a9efaa DG |
2339 | break; |
2340 | } | |
d78d6610 | 2341 | #if 0 |
78f0bacd DG |
2342 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: |
2343 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
44d3bd01 | 2344 | case LTTNG_DOMAIN_UST_PID: |
d78d6610 | 2345 | #endif |
44d3bd01 DG |
2346 | default: |
2347 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2348 | goto error; | |
54d01ffb DG |
2349 | } |
2350 | ||
54d01ffb DG |
2351 | error: |
2352 | return ret; | |
2353 | } | |
2354 | ||
2355 | /* | |
2356 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
2357 | */ | |
2358 | static int cmd_disable_event(struct ltt_session *session, int domain, | |
2359 | char *channel_name, char *event_name) | |
2360 | { | |
2361 | int ret; | |
54d01ffb DG |
2362 | |
2363 | switch (domain) { | |
2364 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
2365 | { |
2366 | struct ltt_kernel_channel *kchan; | |
b0a40d28 | 2367 | struct ltt_kernel_session *ksess; |
2bdd86d4 | 2368 | |
b0a40d28 DG |
2369 | ksess = session->kernel_session; |
2370 | ||
2371 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
54d01ffb DG |
2372 | if (kchan == NULL) { |
2373 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2374 | goto error; | |
d65106b1 DG |
2375 | } |
2376 | ||
b0a40d28 | 2377 | ret = event_kernel_disable_tracepoint(ksess, kchan, event_name); |
54d01ffb DG |
2378 | if (ret != LTTCOMM_OK) { |
2379 | goto error; | |
2380 | } | |
2381 | ||
2382 | kernel_wait_quiescent(kernel_tracer_fd); | |
d65106b1 | 2383 | break; |
2bdd86d4 MD |
2384 | } |
2385 | case LTTNG_DOMAIN_UST: | |
b0a40d28 | 2386 | { |
b0a40d28 | 2387 | struct ltt_ust_channel *uchan; |
7f79d3a1 | 2388 | struct ltt_ust_session *usess; |
b0a40d28 DG |
2389 | |
2390 | usess = session->ust_session; | |
2391 | ||
2392 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2393 | channel_name); | |
2394 | if (uchan == NULL) { | |
2395 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
2396 | goto error; | |
2397 | } | |
2398 | ||
7f79d3a1 DG |
2399 | ret = event_ust_disable_tracepoint(usess, domain, uchan, event_name); |
2400 | if (ret != LTTCOMM_OK) { | |
b0a40d28 DG |
2401 | goto error; |
2402 | } | |
2403 | ||
7f79d3a1 | 2404 | DBG3("Disable UST event %s in channel %s completed", event_name, |
b0a40d28 | 2405 | channel_name); |
b0a40d28 DG |
2406 | break; |
2407 | } | |
d78d6610 | 2408 | #if 0 |
2bdd86d4 MD |
2409 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2410 | case LTTNG_DOMAIN_UST_PID: | |
2411 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2412 | #endif |
54d01ffb | 2413 | default: |
1ab1ea0b | 2414 | ret = LTTCOMM_UND; |
54d01ffb | 2415 | goto error; |
d65106b1 | 2416 | } |
26cc6b4e | 2417 | |
54d01ffb DG |
2418 | ret = LTTCOMM_OK; |
2419 | ||
2420 | error: | |
2421 | return ret; | |
2422 | } | |
2423 | ||
2424 | /* | |
2425 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
2426 | */ | |
2427 | static int cmd_disable_event_all(struct ltt_session *session, int domain, | |
2428 | char *channel_name) | |
2429 | { | |
2430 | int ret; | |
54d01ffb DG |
2431 | |
2432 | switch (domain) { | |
2433 | case LTTNG_DOMAIN_KERNEL: | |
9730260e DG |
2434 | { |
2435 | struct ltt_kernel_session *ksess; | |
2436 | struct ltt_kernel_channel *kchan; | |
2437 | ||
2438 | ksess = session->kernel_session; | |
2439 | ||
2440 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
54d01ffb DG |
2441 | if (kchan == NULL) { |
2442 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2443 | goto error; | |
26cc6b4e DG |
2444 | } |
2445 | ||
9730260e | 2446 | ret = event_kernel_disable_all(ksess, kchan); |
54d01ffb | 2447 | if (ret != LTTCOMM_OK) { |
0b97ec54 | 2448 | goto error; |
26cc6b4e DG |
2449 | } |
2450 | ||
54d01ffb | 2451 | kernel_wait_quiescent(kernel_tracer_fd); |
26cc6b4e | 2452 | break; |
9730260e DG |
2453 | } |
2454 | case LTTNG_DOMAIN_UST: | |
2455 | { | |
2456 | struct ltt_ust_session *usess; | |
2457 | struct ltt_ust_channel *uchan; | |
2458 | ||
2459 | usess = session->ust_session; | |
2460 | ||
2461 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2462 | channel_name); | |
2463 | if (uchan == NULL) { | |
2464 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
2465 | goto error; | |
2466 | } | |
2467 | ||
7f79d3a1 DG |
2468 | ret = event_ust_disable_all_tracepoints(usess, domain, uchan); |
2469 | if (ret != 0) { | |
9730260e DG |
2470 | goto error; |
2471 | } | |
2472 | ||
7f79d3a1 | 2473 | DBG3("Disable all UST events in channel %s completed", channel_name); |
9730260e DG |
2474 | |
2475 | break; | |
2476 | } | |
d78d6610 | 2477 | #if 0 |
9730260e DG |
2478 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2479 | case LTTNG_DOMAIN_UST_PID: | |
2480 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2481 | #endif |
54d01ffb | 2482 | default: |
1ab1ea0b | 2483 | ret = LTTCOMM_UND; |
54d01ffb | 2484 | goto error; |
26cc6b4e | 2485 | } |
e953ef25 | 2486 | |
54d01ffb | 2487 | ret = LTTCOMM_OK; |
e953ef25 | 2488 | |
54d01ffb DG |
2489 | error: |
2490 | return ret; | |
2491 | } | |
f5177a38 | 2492 | |
54d01ffb DG |
2493 | /* |
2494 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
2495 | */ | |
2496 | static int cmd_add_context(struct ltt_session *session, int domain, | |
2497 | char *channel_name, char *event_name, struct lttng_event_context *ctx) | |
2498 | { | |
2499 | int ret; | |
f5177a38 | 2500 | |
54d01ffb DG |
2501 | switch (domain) { |
2502 | case LTTNG_DOMAIN_KERNEL: | |
2503 | /* Add kernel context to kernel tracer */ | |
2504 | ret = context_kernel_add(session->kernel_session, ctx, | |
2505 | event_name, channel_name); | |
2506 | if (ret != LTTCOMM_OK) { | |
f5177a38 | 2507 | goto error; |
e953ef25 | 2508 | } |
2bdd86d4 MD |
2509 | break; |
2510 | case LTTNG_DOMAIN_UST: | |
2511 | { | |
55cc08a6 | 2512 | struct ltt_ust_session *usess = session->ust_session; |
e953ef25 | 2513 | |
55cc08a6 DG |
2514 | ret = context_ust_add(usess, domain, ctx, event_name, channel_name); |
2515 | if (ret != LTTCOMM_OK) { | |
2516 | goto error; | |
2bdd86d4 | 2517 | } |
e953ef25 | 2518 | break; |
2bdd86d4 | 2519 | } |
d78d6610 | 2520 | #if 0 |
55cc08a6 DG |
2521 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2522 | case LTTNG_DOMAIN_UST_PID: | |
2523 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2524 | #endif |
54d01ffb | 2525 | default: |
1ab1ea0b | 2526 | ret = LTTCOMM_UND; |
54d01ffb | 2527 | goto error; |
e953ef25 | 2528 | } |
950131af | 2529 | |
54d01ffb | 2530 | ret = LTTCOMM_OK; |
950131af | 2531 | |
54d01ffb DG |
2532 | error: |
2533 | return ret; | |
2534 | } | |
2535 | ||
2536 | /* | |
2537 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2538 | */ | |
2539 | static int cmd_enable_event(struct ltt_session *session, int domain, | |
2540 | char *channel_name, struct lttng_event *event) | |
2541 | { | |
2542 | int ret; | |
f6cd6b0f | 2543 | struct lttng_channel *attr; |
48842b30 | 2544 | struct ltt_ust_session *usess = session->ust_session; |
54d01ffb DG |
2545 | |
2546 | switch (domain) { | |
2547 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
2548 | { |
2549 | struct ltt_kernel_channel *kchan; | |
2550 | ||
54d01ffb DG |
2551 | kchan = trace_kernel_get_channel_by_name(channel_name, |
2552 | session->kernel_session); | |
2553 | if (kchan == NULL) { | |
f6cd6b0f DG |
2554 | attr = channel_new_default_attr(domain); |
2555 | if (attr == NULL) { | |
2556 | ret = LTTCOMM_FATAL; | |
2557 | goto error; | |
2558 | } | |
2559 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
2560 | ||
54d01ffb | 2561 | /* This call will notify the kernel thread */ |
44d3bd01 | 2562 | ret = channel_kernel_create(session->kernel_session, |
f6cd6b0f | 2563 | attr, kernel_poll_pipe[1]); |
54d01ffb | 2564 | if (ret != LTTCOMM_OK) { |
ff4d74e6 | 2565 | free(attr); |
f5177a38 DG |
2566 | goto error; |
2567 | } | |
ff4d74e6 | 2568 | free(attr); |
54d01ffb | 2569 | } |
950131af | 2570 | |
54d01ffb DG |
2571 | /* Get the newly created kernel channel pointer */ |
2572 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2573 | session->kernel_session); | |
2574 | if (kchan == NULL) { | |
2575 | /* This sould not happen... */ | |
2576 | ret = LTTCOMM_FATAL; | |
2577 | goto error; | |
2578 | } | |
f5177a38 | 2579 | |
48842b30 DG |
2580 | ret = event_kernel_enable_tracepoint(session->kernel_session, kchan, |
2581 | event); | |
54d01ffb | 2582 | if (ret != LTTCOMM_OK) { |
f5177a38 | 2583 | goto error; |
950131af DG |
2584 | } |
2585 | ||
54d01ffb | 2586 | kernel_wait_quiescent(kernel_tracer_fd); |
950131af | 2587 | break; |
2bdd86d4 MD |
2588 | } |
2589 | case LTTNG_DOMAIN_UST: | |
2590 | { | |
aea829b3 | 2591 | struct lttng_channel *attr; |
edb67388 | 2592 | struct ltt_ust_channel *uchan; |
2bdd86d4 | 2593 | |
edb67388 | 2594 | /* Get channel from global UST domain */ |
48842b30 DG |
2595 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
2596 | channel_name); | |
2597 | if (uchan == NULL) { | |
aea829b3 DG |
2598 | /* Create default channel */ |
2599 | attr = channel_new_default_attr(domain); | |
2600 | if (attr == NULL) { | |
2601 | ret = LTTCOMM_FATAL; | |
2602 | goto error; | |
2603 | } | |
596219f7 | 2604 | snprintf(attr->name, NAME_MAX, "%s", channel_name); |
edb67388 | 2605 | attr->name[NAME_MAX - 1] = '\0'; |
aea829b3 | 2606 | |
7885e399 | 2607 | ret = channel_ust_create(usess, domain, attr); |
edb67388 | 2608 | if (ret != LTTCOMM_OK) { |
ff4d74e6 | 2609 | free(attr); |
aea829b3 DG |
2610 | goto error; |
2611 | } | |
aea829b3 DG |
2612 | free(attr); |
2613 | ||
2614 | /* Get the newly created channel reference back */ | |
2615 | uchan = trace_ust_find_channel_by_name( | |
2616 | usess->domain_global.channels, channel_name); | |
2617 | if (uchan == NULL) { | |
2618 | /* Something is really wrong */ | |
2619 | ret = LTTCOMM_FATAL; | |
2620 | goto error; | |
2621 | } | |
48842b30 | 2622 | } |
2bdd86d4 | 2623 | |
edb67388 | 2624 | /* At this point, the session and channel exist on the tracer */ |
edb67388 DG |
2625 | ret = event_ust_enable_tracepoint(usess, domain, uchan, event); |
2626 | if (ret != LTTCOMM_OK) { | |
48842b30 | 2627 | goto error; |
2bdd86d4 MD |
2628 | } |
2629 | break; | |
2630 | } | |
d78d6610 | 2631 | #if 0 |
2bdd86d4 MD |
2632 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2633 | case LTTNG_DOMAIN_UST_PID: | |
2634 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2635 | #endif |
54d01ffb | 2636 | default: |
1ab1ea0b | 2637 | ret = LTTCOMM_UND; |
54d01ffb | 2638 | goto error; |
950131af | 2639 | } |
d36b8583 | 2640 | |
54d01ffb | 2641 | ret = LTTCOMM_OK; |
d36b8583 | 2642 | |
54d01ffb DG |
2643 | error: |
2644 | return ret; | |
2645 | } | |
7d29a247 | 2646 | |
54d01ffb DG |
2647 | /* |
2648 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
2649 | */ | |
2650 | static int cmd_enable_event_all(struct ltt_session *session, int domain, | |
8c9ae521 | 2651 | char *channel_name, int event_type) |
54d01ffb DG |
2652 | { |
2653 | int ret; | |
2654 | struct ltt_kernel_channel *kchan; | |
7d29a247 | 2655 | |
54d01ffb DG |
2656 | switch (domain) { |
2657 | case LTTNG_DOMAIN_KERNEL: | |
2658 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2659 | session->kernel_session); | |
2660 | if (kchan == NULL) { | |
2661 | /* This call will notify the kernel thread */ | |
44d3bd01 DG |
2662 | ret = channel_kernel_create(session->kernel_session, NULL, |
2663 | kernel_poll_pipe[1]); | |
54d01ffb DG |
2664 | if (ret != LTTCOMM_OK) { |
2665 | goto error; | |
d36b8583 | 2666 | } |
0d0c377a | 2667 | |
8f69e5eb DG |
2668 | /* Get the newly created kernel channel pointer */ |
2669 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2670 | session->kernel_session); | |
2671 | if (kchan == NULL) { | |
2672 | /* This sould not happen... */ | |
2673 | ret = LTTCOMM_FATAL; | |
2674 | goto error; | |
2675 | } | |
2676 | ||
54d01ffb | 2677 | } |
0fdd1e2c | 2678 | |
7a3d1328 | 2679 | switch (event_type) { |
76d45b40 | 2680 | case LTTNG_EVENT_SYSCALL: |
7a3d1328 | 2681 | ret = event_kernel_enable_all_syscalls(session->kernel_session, |
8c9ae521 | 2682 | kchan, kernel_tracer_fd); |
7a3d1328 | 2683 | break; |
76d45b40 | 2684 | case LTTNG_EVENT_TRACEPOINT: |
8c9ae521 | 2685 | /* |
7a3d1328 MD |
2686 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and |
2687 | * events already registered to the channel. | |
8c9ae521 | 2688 | */ |
7a3d1328 MD |
2689 | ret = event_kernel_enable_all_tracepoints(session->kernel_session, |
2690 | kchan, kernel_tracer_fd); | |
2691 | break; | |
76d45b40 | 2692 | case LTTNG_EVENT_ALL: |
7a3d1328 | 2693 | /* Enable syscalls and tracepoints */ |
8c9ae521 DG |
2694 | ret = event_kernel_enable_all(session->kernel_session, |
2695 | kchan, kernel_tracer_fd); | |
7a3d1328 MD |
2696 | break; |
2697 | default: | |
2698 | ret = LTTCOMM_KERN_ENABLE_FAIL; | |
2699 | goto error; | |
8c9ae521 | 2700 | } |
8f69e5eb DG |
2701 | |
2702 | /* Manage return value */ | |
54d01ffb | 2703 | if (ret != LTTCOMM_OK) { |
0d0c377a | 2704 | goto error; |
d36b8583 DG |
2705 | } |
2706 | ||
54d01ffb | 2707 | kernel_wait_quiescent(kernel_tracer_fd); |
d36b8583 | 2708 | break; |
76d45b40 DG |
2709 | case LTTNG_DOMAIN_UST: |
2710 | { | |
2711 | struct lttng_channel *attr; | |
2712 | struct ltt_ust_channel *uchan; | |
2713 | struct ltt_ust_session *usess = session->ust_session; | |
2714 | ||
2715 | /* Get channel from global UST domain */ | |
2716 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2717 | channel_name); | |
2718 | if (uchan == NULL) { | |
2719 | /* Create default channel */ | |
2720 | attr = channel_new_default_attr(domain); | |
2721 | if (attr == NULL) { | |
2722 | ret = LTTCOMM_FATAL; | |
2723 | goto error; | |
2724 | } | |
2725 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
2726 | attr->name[NAME_MAX - 1] = '\0'; | |
2727 | ||
2728 | /* Use the internal command enable channel */ | |
7885e399 | 2729 | ret = channel_ust_create(usess, domain, attr); |
76d45b40 DG |
2730 | if (ret != LTTCOMM_OK) { |
2731 | free(attr); | |
2732 | goto error; | |
2733 | } | |
2734 | free(attr); | |
2735 | ||
2736 | /* Get the newly created channel reference back */ | |
2737 | uchan = trace_ust_find_channel_by_name( | |
2738 | usess->domain_global.channels, channel_name); | |
2739 | if (uchan == NULL) { | |
2740 | /* Something is really wrong */ | |
2741 | ret = LTTCOMM_FATAL; | |
2742 | goto error; | |
2743 | } | |
2744 | } | |
2745 | ||
2746 | /* At this point, the session and channel exist on the tracer */ | |
2747 | ||
2748 | switch (event_type) { | |
2749 | case LTTNG_EVENT_ALL: | |
2750 | case LTTNG_EVENT_TRACEPOINT: | |
2751 | ret = event_ust_enable_all_tracepoints(usess, domain, uchan); | |
2752 | if (ret != LTTCOMM_OK) { | |
2753 | goto error; | |
2754 | } | |
2755 | break; | |
2756 | default: | |
2757 | ret = LTTCOMM_UST_ENABLE_FAIL; | |
2758 | goto error; | |
2759 | } | |
2760 | ||
2761 | /* Manage return value */ | |
2762 | if (ret != LTTCOMM_OK) { | |
2763 | goto error; | |
2764 | } | |
2765 | ||
2766 | break; | |
2767 | } | |
d78d6610 | 2768 | #if 0 |
76d45b40 DG |
2769 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2770 | case LTTNG_DOMAIN_UST_PID: | |
2771 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2772 | #endif |
54d01ffb | 2773 | default: |
1ab1ea0b | 2774 | ret = LTTCOMM_UND; |
54d01ffb | 2775 | goto error; |
d36b8583 | 2776 | } |
f3ed775e | 2777 | |
54d01ffb DG |
2778 | ret = LTTCOMM_OK; |
2779 | ||
2780 | error: | |
2781 | return ret; | |
2782 | } | |
2783 | ||
2784 | /* | |
2785 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2786 | */ | |
2787 | static ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
2788 | { | |
2789 | int ret; | |
2790 | ssize_t nb_events = 0; | |
2791 | ||
2792 | switch (domain) { | |
2793 | case LTTNG_DOMAIN_KERNEL: | |
2794 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
2795 | if (nb_events < 0) { | |
2796 | ret = LTTCOMM_KERN_LIST_FAIL; | |
2797 | goto error; | |
894be886 | 2798 | } |
54d01ffb | 2799 | break; |
b551a063 DG |
2800 | case LTTNG_DOMAIN_UST: |
2801 | nb_events = ust_app_list_events(events); | |
2802 | if (nb_events < 0) { | |
2803 | ret = LTTCOMM_UST_LIST_FAIL; | |
2804 | goto error; | |
2805 | } | |
2806 | break; | |
54d01ffb | 2807 | default: |
1ab1ea0b | 2808 | ret = LTTCOMM_UND; |
54d01ffb DG |
2809 | goto error; |
2810 | } | |
894be886 | 2811 | |
54d01ffb | 2812 | return nb_events; |
7d29a247 | 2813 | |
54d01ffb DG |
2814 | error: |
2815 | /* Return negative value to differentiate return code */ | |
2816 | return -ret; | |
2817 | } | |
b389abbe | 2818 | |
54d01ffb DG |
2819 | /* |
2820 | * Command LTTNG_START_TRACE processed by the client thread. | |
2821 | */ | |
2822 | static int cmd_start_trace(struct ltt_session *session) | |
2823 | { | |
2824 | int ret; | |
54d01ffb | 2825 | struct ltt_kernel_session *ksession; |
b9d9b220 | 2826 | struct ltt_ust_session *usess; |
b389abbe | 2827 | |
54d01ffb DG |
2828 | /* Short cut */ |
2829 | ksession = session->kernel_session; | |
b9d9b220 | 2830 | usess = session->ust_session; |
5eb91c98 | 2831 | |
b9ef1c83 DG |
2832 | if (session->enabled) { |
2833 | ret = LTTCOMM_UST_START_FAIL; | |
2834 | goto error; | |
2835 | } | |
2836 | ||
464dd62d MD |
2837 | session->enabled = 1; |
2838 | ||
54d01ffb DG |
2839 | /* Kernel tracing */ |
2840 | if (ksession != NULL) { | |
2bdd86d4 MD |
2841 | struct ltt_kernel_channel *kchan; |
2842 | ||
54d01ffb DG |
2843 | /* Open kernel metadata */ |
2844 | if (ksession->metadata == NULL) { | |
2845 | ret = kernel_open_metadata(ksession, ksession->trace_path); | |
2846 | if (ret < 0) { | |
2847 | ret = LTTCOMM_KERN_META_FAIL; | |
2848 | goto error; | |
b389abbe | 2849 | } |
54d01ffb | 2850 | } |
7d29a247 | 2851 | |
54d01ffb DG |
2852 | /* Open kernel metadata stream */ |
2853 | if (ksession->metadata_stream_fd == 0) { | |
2854 | ret = kernel_open_metadata_stream(ksession); | |
2855 | if (ret < 0) { | |
2856 | ERR("Kernel create metadata stream failed"); | |
2857 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
2858 | goto error; | |
2859 | } | |
2860 | } | |
2861 | ||
2862 | /* For each channel */ | |
2863 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
2864 | if (kchan->stream_count == 0) { | |
2865 | ret = kernel_open_channel_stream(kchan); | |
2866 | if (ret < 0) { | |
2867 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
7d29a247 DG |
2868 | goto error; |
2869 | } | |
54d01ffb DG |
2870 | /* Update the stream global counter */ |
2871 | ksession->stream_count_global += ret; | |
7d29a247 | 2872 | } |
54d01ffb DG |
2873 | } |
2874 | ||
2875 | /* Setup kernel consumer socket and send fds to it */ | |
2876 | ret = init_kernel_tracing(ksession); | |
2877 | if (ret < 0) { | |
2878 | ret = LTTCOMM_KERN_START_FAIL; | |
2879 | goto error; | |
2880 | } | |
2881 | ||
2882 | /* This start the kernel tracing */ | |
2883 | ret = kernel_start_session(ksession); | |
2884 | if (ret < 0) { | |
2885 | ret = LTTCOMM_KERN_START_FAIL; | |
2886 | goto error; | |
2887 | } | |
2888 | ||
2889 | /* Quiescent wait after starting trace */ | |
2890 | kernel_wait_quiescent(kernel_tracer_fd); | |
2891 | } | |
2892 | ||
36dc12cc | 2893 | /* Flag session that trace should start automatically */ |
b9d9b220 DG |
2894 | if (usess) { |
2895 | usess->start_trace = 1; | |
36dc12cc | 2896 | |
b9d9b220 DG |
2897 | ret = ust_app_start_trace_all(usess); |
2898 | if (ret < 0) { | |
2899 | ret = LTTCOMM_UST_START_FAIL; | |
2900 | goto error; | |
2901 | } | |
2bdd86d4 | 2902 | } |
54d01ffb DG |
2903 | |
2904 | ret = LTTCOMM_OK; | |
2905 | ||
2906 | error: | |
2907 | return ret; | |
2908 | } | |
2909 | ||
2910 | /* | |
2911 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2912 | */ | |
2913 | static int cmd_stop_trace(struct ltt_session *session) | |
2914 | { | |
2915 | int ret; | |
2916 | struct ltt_kernel_channel *kchan; | |
2917 | struct ltt_kernel_session *ksession; | |
8be98f9a | 2918 | struct ltt_ust_session *usess; |
54d01ffb DG |
2919 | |
2920 | /* Short cut */ | |
2921 | ksession = session->kernel_session; | |
8be98f9a | 2922 | usess = session->ust_session; |
54d01ffb | 2923 | |
b9ef1c83 | 2924 | if (!session->enabled) { |
190df5ac | 2925 | ret = LTTCOMM_UST_STOP_FAIL; |
b9ef1c83 DG |
2926 | goto error; |
2927 | } | |
2928 | ||
464dd62d MD |
2929 | session->enabled = 0; |
2930 | ||
54d01ffb DG |
2931 | /* Kernel tracer */ |
2932 | if (ksession != NULL) { | |
2933 | DBG("Stop kernel tracing"); | |
2934 | ||
2935 | /* Flush all buffers before stopping */ | |
2936 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
2937 | if (ret < 0) { | |
2938 | ERR("Kernel metadata flush failed"); | |
2939 | } | |
f34daff7 | 2940 | |
54d01ffb DG |
2941 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { |
2942 | ret = kernel_flush_buffer(kchan); | |
0d0c377a | 2943 | if (ret < 0) { |
54d01ffb | 2944 | ERR("Kernel flush buffer error"); |
7d29a247 | 2945 | } |
54d01ffb | 2946 | } |
19e70852 | 2947 | |
54d01ffb DG |
2948 | ret = kernel_stop_session(ksession); |
2949 | if (ret < 0) { | |
2950 | ret = LTTCOMM_KERN_STOP_FAIL; | |
19e70852 | 2951 | goto error; |
f3ed775e | 2952 | } |
54d01ffb DG |
2953 | |
2954 | kernel_wait_quiescent(kernel_tracer_fd); | |
894be886 | 2955 | } |
54d01ffb | 2956 | |
8be98f9a MD |
2957 | if (usess) { |
2958 | usess->start_trace = 0; | |
2bdd86d4 | 2959 | |
8be98f9a | 2960 | ret = ust_app_stop_trace_all(usess); |
2bdd86d4 | 2961 | if (ret < 0) { |
190df5ac | 2962 | ret = LTTCOMM_UST_STOP_FAIL; |
2bdd86d4 MD |
2963 | goto error; |
2964 | } | |
2bdd86d4 | 2965 | } |
54d01ffb DG |
2966 | |
2967 | ret = LTTCOMM_OK; | |
2968 | ||
2969 | error: | |
2970 | return ret; | |
2971 | } | |
2972 | ||
2973 | /* | |
2974 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
2975 | */ | |
ca4537d3 | 2976 | static int cmd_create_session(char *name, char *path, struct ucred *creds) |
54d01ffb DG |
2977 | { |
2978 | int ret; | |
2979 | ||
ca4537d3 | 2980 | ret = session_create(name, path, creds->uid, creds->gid); |
54d01ffb DG |
2981 | if (ret != LTTCOMM_OK) { |
2982 | goto error; | |
2983 | } | |
2984 | ||
2985 | ret = LTTCOMM_OK; | |
2986 | ||
2987 | error: | |
2988 | return ret; | |
2989 | } | |
2990 | ||
2991 | /* | |
2992 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
2993 | */ | |
2994 | static int cmd_destroy_session(struct ltt_session *session, char *name) | |
2995 | { | |
2996 | int ret; | |
2997 | ||
2998 | /* Clean kernel session teardown */ | |
2999 | teardown_kernel_session(session); | |
84cd17c6 MD |
3000 | /* UST session teardown */ |
3001 | teardown_ust_session(session); | |
54d01ffb DG |
3002 | |
3003 | /* | |
3004 | * Must notify the kernel thread here to update it's poll setin order | |
3005 | * to remove the channel(s)' fd just destroyed. | |
3006 | */ | |
3007 | ret = notify_thread_pipe(kernel_poll_pipe[1]); | |
3008 | if (ret < 0) { | |
76d7553f | 3009 | PERROR("write kernel poll pipe"); |
54d01ffb DG |
3010 | } |
3011 | ||
271933a4 | 3012 | ret = session_destroy(session); |
54d01ffb DG |
3013 | |
3014 | return ret; | |
3015 | } | |
3016 | ||
3017 | /* | |
3018 | * Command LTTNG_CALIBRATE processed by the client thread. | |
3019 | */ | |
3020 | static int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
3021 | { | |
3022 | int ret; | |
3023 | ||
3024 | switch (domain) { | |
3025 | case LTTNG_DOMAIN_KERNEL: | |
33a2b854 | 3026 | { |
54d01ffb | 3027 | struct lttng_kernel_calibrate kcalibrate; |
33a2b854 | 3028 | |
54d01ffb DG |
3029 | kcalibrate.type = calibrate->type; |
3030 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
33a2b854 | 3031 | if (ret < 0) { |
54d01ffb DG |
3032 | ret = LTTCOMM_KERN_ENABLE_FAIL; |
3033 | goto error; | |
33a2b854 | 3034 | } |
54d01ffb DG |
3035 | break; |
3036 | } | |
4466912f DG |
3037 | case LTTNG_DOMAIN_UST: |
3038 | { | |
3039 | struct lttng_ust_calibrate ucalibrate; | |
3040 | ||
3041 | ucalibrate.type = calibrate->type; | |
3042 | ret = ust_app_calibrate_glb(&ucalibrate); | |
3043 | if (ret < 0) { | |
3044 | ret = LTTCOMM_UST_CALIBRATE_FAIL; | |
3045 | goto error; | |
3046 | } | |
3047 | break; | |
3048 | } | |
54d01ffb | 3049 | default: |
1ab1ea0b | 3050 | ret = LTTCOMM_UND; |
54d01ffb DG |
3051 | goto error; |
3052 | } | |
33a2b854 | 3053 | |
54d01ffb | 3054 | ret = LTTCOMM_OK; |
33a2b854 | 3055 | |
54d01ffb DG |
3056 | error: |
3057 | return ret; | |
3058 | } | |
7d29a247 | 3059 | |
54d01ffb DG |
3060 | /* |
3061 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
3062 | */ | |
3063 | static int cmd_register_consumer(struct ltt_session *session, int domain, | |
3064 | char *sock_path) | |
3065 | { | |
3066 | int ret, sock; | |
b389abbe | 3067 | |
54d01ffb DG |
3068 | switch (domain) { |
3069 | case LTTNG_DOMAIN_KERNEL: | |
3070 | /* Can't register a consumer if there is already one */ | |
48c4f28c | 3071 | if (session->kernel_session->consumer_fds_sent != 0) { |
54d01ffb DG |
3072 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
3073 | goto error; | |
3074 | } | |
3075 | ||
3076 | sock = lttcomm_connect_unix_sock(sock_path); | |
3077 | if (sock < 0) { | |
3078 | ret = LTTCOMM_CONNECT_FAIL; | |
3079 | goto error; | |
3080 | } | |
3081 | ||
3082 | session->kernel_session->consumer_fd = sock; | |
3083 | break; | |
3084 | default: | |
3085 | /* TODO: Userspace tracing */ | |
1ab1ea0b | 3086 | ret = LTTCOMM_UND; |
54d01ffb DG |
3087 | goto error; |
3088 | } | |
3089 | ||
3090 | ret = LTTCOMM_OK; | |
3091 | ||
3092 | error: | |
3093 | return ret; | |
3094 | } | |
3095 | ||
3096 | /* | |
3097 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
3098 | */ | |
3099 | static ssize_t cmd_list_domains(struct ltt_session *session, | |
3100 | struct lttng_domain **domains) | |
3101 | { | |
b551a063 | 3102 | int ret, index = 0; |
54d01ffb DG |
3103 | ssize_t nb_dom = 0; |
3104 | ||
3105 | if (session->kernel_session != NULL) { | |
b551a063 | 3106 | DBG3("Listing domains found kernel domain"); |
54d01ffb DG |
3107 | nb_dom++; |
3108 | } | |
3109 | ||
b551a063 DG |
3110 | if (session->ust_session != NULL) { |
3111 | DBG3("Listing domains found UST global domain"); | |
3112 | nb_dom++; | |
3113 | } | |
54d01ffb | 3114 | |
b551a063 | 3115 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
54d01ffb DG |
3116 | if (*domains == NULL) { |
3117 | ret = -LTTCOMM_FATAL; | |
3118 | goto error; | |
3119 | } | |
3120 | ||
b551a063 DG |
3121 | if (session->kernel_session != NULL) { |
3122 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
3123 | index++; | |
3124 | } | |
3125 | ||
3126 | if (session->ust_session != NULL) { | |
3127 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
3128 | index++; | |
3129 | } | |
54d01ffb | 3130 | |
54d01ffb DG |
3131 | return nb_dom; |
3132 | ||
3133 | error: | |
3134 | return ret; | |
3135 | } | |
3136 | ||
3137 | /* | |
3138 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
3139 | */ | |
b551a063 | 3140 | static ssize_t cmd_list_channels(int domain, struct ltt_session *session, |
54d01ffb DG |
3141 | struct lttng_channel **channels) |
3142 | { | |
3143 | int ret; | |
3144 | ssize_t nb_chan = 0; | |
3145 | ||
b551a063 DG |
3146 | switch (domain) { |
3147 | case LTTNG_DOMAIN_KERNEL: | |
3148 | if (session->kernel_session != NULL) { | |
3149 | nb_chan = session->kernel_session->channel_count; | |
3150 | } | |
0df502fd | 3151 | DBG3("Number of kernel channels %zd", nb_chan); |
b551a063 DG |
3152 | break; |
3153 | case LTTNG_DOMAIN_UST: | |
3154 | if (session->ust_session != NULL) { | |
bec39940 | 3155 | nb_chan = lttng_ht_get_count( |
b551a063 DG |
3156 | session->ust_session->domain_global.channels); |
3157 | } | |
0df502fd | 3158 | DBG3("Number of UST global channels %zd", nb_chan); |
b551a063 DG |
3159 | break; |
3160 | default: | |
3161 | *channels = NULL; | |
1ab1ea0b | 3162 | ret = -LTTCOMM_UND; |
54d01ffb DG |
3163 | goto error; |
3164 | } | |
3165 | ||
b551a063 DG |
3166 | if (nb_chan > 0) { |
3167 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
3168 | if (*channels == NULL) { | |
3169 | ret = -LTTCOMM_FATAL; | |
3170 | goto error; | |
3171 | } | |
54d01ffb | 3172 | |
b551a063 DG |
3173 | list_lttng_channels(domain, session, *channels); |
3174 | } else { | |
3175 | *channels = NULL; | |
3176 | } | |
2bdd86d4 | 3177 | |
54d01ffb DG |
3178 | return nb_chan; |
3179 | ||
3180 | error: | |
3181 | return ret; | |
3182 | } | |
3183 | ||
3184 | /* | |
3185 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
3186 | */ | |
b551a063 | 3187 | static ssize_t cmd_list_events(int domain, struct ltt_session *session, |
54d01ffb DG |
3188 | char *channel_name, struct lttng_event **events) |
3189 | { | |
b551a063 | 3190 | int ret = 0; |
54d01ffb | 3191 | ssize_t nb_event = 0; |
54d01ffb | 3192 | |
b551a063 DG |
3193 | switch (domain) { |
3194 | case LTTNG_DOMAIN_KERNEL: | |
3195 | if (session->kernel_session != NULL) { | |
3196 | nb_event = list_lttng_kernel_events(channel_name, | |
3197 | session->kernel_session, events); | |
54d01ffb | 3198 | } |
b551a063 DG |
3199 | break; |
3200 | case LTTNG_DOMAIN_UST: | |
3201 | { | |
3202 | if (session->ust_session != NULL) { | |
3203 | nb_event = list_lttng_ust_global_events(channel_name, | |
3204 | &session->ust_session->domain_global, events); | |
3205 | } | |
3206 | break; | |
54d01ffb | 3207 | } |
b551a063 | 3208 | default: |
1ab1ea0b | 3209 | ret = -LTTCOMM_UND; |
54d01ffb DG |
3210 | goto error; |
3211 | } | |
3212 | ||
b551a063 | 3213 | ret = nb_event; |
54d01ffb DG |
3214 | |
3215 | error: | |
3216 | return ret; | |
3217 | } | |
3218 | ||
3219 | /* | |
3220 | * Process the command requested by the lttng client within the command | |
3221 | * context structure. This function make sure that the return structure (llm) | |
3222 | * is set and ready for transmission before returning. | |
3223 | * | |
3224 | * Return any error encountered or 0 for success. | |
3225 | */ | |
3226 | static int process_client_msg(struct command_ctx *cmd_ctx) | |
3227 | { | |
3228 | int ret = LTTCOMM_OK; | |
44d3bd01 | 3229 | int need_tracing_session = 1; |
f84aa40a | 3230 | int need_domain; |
54d01ffb DG |
3231 | |
3232 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
3233 | ||
f84aa40a MD |
3234 | switch (cmd_ctx->lsm->cmd_type) { |
3235 | case LTTNG_CREATE_SESSION: | |
3236 | case LTTNG_DESTROY_SESSION: | |
3237 | case LTTNG_LIST_SESSIONS: | |
3238 | case LTTNG_LIST_DOMAINS: | |
3239 | case LTTNG_START_TRACE: | |
3240 | case LTTNG_STOP_TRACE: | |
3241 | need_domain = 0; | |
faf09bcf | 3242 | break; |
f84aa40a MD |
3243 | default: |
3244 | need_domain = 1; | |
3245 | } | |
3246 | ||
3247 | if (opt_no_kernel && need_domain | |
3248 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
4fba7219 DG |
3249 | ret = LTTCOMM_KERN_NA; |
3250 | goto error; | |
3251 | } | |
3252 | ||
54d01ffb DG |
3253 | /* |
3254 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 3255 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
3256 | * command. |
3257 | */ | |
3258 | switch(cmd_ctx->lsm->cmd_type) { | |
3259 | case LTTNG_LIST_SESSIONS: | |
3260 | case LTTNG_LIST_TRACEPOINTS: | |
3261 | case LTTNG_LIST_DOMAINS: | |
3262 | case LTTNG_LIST_CHANNELS: | |
3263 | case LTTNG_LIST_EVENTS: | |
3264 | break; | |
3265 | default: | |
3266 | /* Setup lttng message with no payload */ | |
3267 | ret = setup_lttng_msg(cmd_ctx, 0); | |
3268 | if (ret < 0) { | |
3269 | /* This label does not try to unlock the session */ | |
3270 | goto init_setup_error; | |
3271 | } | |
3272 | } | |
3273 | ||
3274 | /* Commands that DO NOT need a session. */ | |
3275 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 3276 | case LTTNG_CREATE_SESSION: |
f84aa40a | 3277 | case LTTNG_CALIBRATE: |
54d01ffb DG |
3278 | case LTTNG_LIST_SESSIONS: |
3279 | case LTTNG_LIST_TRACEPOINTS: | |
44d3bd01 | 3280 | need_tracing_session = 0; |
54d01ffb DG |
3281 | break; |
3282 | default: | |
3283 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
74babd95 | 3284 | session_lock_list(); |
54d01ffb | 3285 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
74babd95 | 3286 | session_unlock_list(); |
54d01ffb DG |
3287 | if (cmd_ctx->session == NULL) { |
3288 | if (cmd_ctx->lsm->session.name != NULL) { | |
3289 | ret = LTTCOMM_SESS_NOT_FOUND; | |
3290 | } else { | |
3291 | /* If no session name specified */ | |
3292 | ret = LTTCOMM_SELECT_SESS; | |
3293 | } | |
3294 | goto error; | |
3295 | } else { | |
3296 | /* Acquire lock for the session */ | |
3297 | session_lock(cmd_ctx->session); | |
3298 | } | |
3299 | break; | |
3300 | } | |
b389abbe | 3301 | |
f84aa40a MD |
3302 | if (!need_domain) { |
3303 | goto skip_domain; | |
3304 | } | |
54d01ffb DG |
3305 | /* |
3306 | * Check domain type for specific "pre-action". | |
3307 | */ | |
3308 | switch (cmd_ctx->lsm->domain.type) { | |
3309 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 DG |
3310 | if (!is_root) { |
3311 | ret = LTTCOMM_KERN_NA; | |
3312 | goto error; | |
3313 | } | |
3314 | ||
54d01ffb | 3315 | /* Kernel tracer check */ |
a4b35e07 | 3316 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3317 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3318 | ret = init_kernel_tracer(); |
3319 | if (ret != 0) { | |
54d01ffb DG |
3320 | goto error; |
3321 | } | |
3322 | } | |
5eb91c98 | 3323 | |
54d01ffb | 3324 | /* Need a session for kernel command */ |
44d3bd01 | 3325 | if (need_tracing_session) { |
54d01ffb | 3326 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3327 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3328 | if (ret < 0) { |
54d01ffb | 3329 | ret = LTTCOMM_KERN_SESS_FAIL; |
5eb91c98 DG |
3330 | goto error; |
3331 | } | |
b389abbe | 3332 | } |
7d29a247 | 3333 | |
54d01ffb | 3334 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3335 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3336 | if (kconsumer_data.pid == 0 && | |
54d01ffb | 3337 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3338 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3339 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3340 | if (ret < 0) { |
54d01ffb DG |
3341 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
3342 | goto error; | |
950131af | 3343 | } |
3ff2ecac MD |
3344 | } else { |
3345 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3346 | } |
0d0c377a | 3347 | } |
54d01ffb | 3348 | break; |
2bdd86d4 | 3349 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3350 | { |
44d3bd01 | 3351 | if (need_tracing_session) { |
f6a9efaa | 3352 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3353 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3354 | &cmd_ctx->lsm->domain); |
44d3bd01 DG |
3355 | if (ret != LTTCOMM_OK) { |
3356 | goto error; | |
3357 | } | |
3358 | } | |
7753dea8 MD |
3359 | /* Start the UST consumer daemons */ |
3360 | /* 64-bit */ | |
3361 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 3362 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 3363 | ustconsumer64_data.pid == 0 && |
2bdd86d4 | 3364 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3365 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3366 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3367 | if (ret < 0) { |
7753dea8 MD |
3368 | ret = LTTCOMM_UST_CONSUMER64_FAIL; |
3369 | ust_consumerd64_fd = -EINVAL; | |
2bdd86d4 MD |
3370 | goto error; |
3371 | } | |
48842b30 | 3372 | |
7753dea8 | 3373 | ust_consumerd64_fd = ustconsumer64_data.cmd_sock; |
3ff2ecac | 3374 | } else { |
7753dea8 MD |
3375 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3376 | } | |
3377 | /* 32-bit */ | |
fc7a59ce | 3378 | if (consumerd32_bin[0] != '\0' && |
7753dea8 MD |
3379 | ustconsumer32_data.pid == 0 && |
3380 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { | |
3381 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
3382 | ret = start_consumerd(&ustconsumer32_data); | |
3383 | if (ret < 0) { | |
3384 | ret = LTTCOMM_UST_CONSUMER32_FAIL; | |
3385 | ust_consumerd32_fd = -EINVAL; | |
3386 | goto error; | |
3387 | } | |
3388 | ust_consumerd32_fd = ustconsumer32_data.cmd_sock; | |
3389 | } else { | |
3390 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3391 | } |
44d3bd01 DG |
3392 | } |
3393 | break; | |
48842b30 | 3394 | } |
54d01ffb | 3395 | default: |
54d01ffb DG |
3396 | break; |
3397 | } | |
f84aa40a | 3398 | skip_domain: |
33a2b854 | 3399 | |
8e0af1b4 MD |
3400 | /* |
3401 | * Check that the UID or GID match that of the tracing session. | |
3402 | * The root user can interact with all sessions. | |
3403 | */ | |
3404 | if (need_tracing_session) { | |
3405 | if (!session_access_ok(cmd_ctx->session, | |
ca4537d3 | 3406 | cmd_ctx->creds.uid, cmd_ctx->creds.gid)) { |
8e0af1b4 MD |
3407 | ret = LTTCOMM_EPERM; |
3408 | goto error; | |
3409 | } | |
3410 | } | |
3411 | ||
54d01ffb DG |
3412 | /* Process by command type */ |
3413 | switch (cmd_ctx->lsm->cmd_type) { | |
3414 | case LTTNG_ADD_CONTEXT: | |
3415 | { | |
3416 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3417 | cmd_ctx->lsm->u.context.channel_name, | |
3418 | cmd_ctx->lsm->u.context.event_name, | |
3419 | &cmd_ctx->lsm->u.context.ctx); | |
3420 | break; | |
3421 | } | |
3422 | case LTTNG_DISABLE_CHANNEL: | |
3423 | { | |
3424 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3425 | cmd_ctx->lsm->u.disable.channel_name); | |
3426 | break; | |
3427 | } | |
3428 | case LTTNG_DISABLE_EVENT: | |
3429 | { | |
3430 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3431 | cmd_ctx->lsm->u.disable.channel_name, | |
3432 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
3433 | break; |
3434 | } | |
54d01ffb DG |
3435 | case LTTNG_DISABLE_ALL_EVENT: |
3436 | { | |
2bdd86d4 | 3437 | DBG("Disabling all events"); |
54d01ffb DG |
3438 | |
3439 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3440 | cmd_ctx->lsm->u.disable.channel_name); | |
3441 | break; | |
3442 | } | |
3443 | case LTTNG_ENABLE_CHANNEL: | |
3444 | { | |
aea829b3 | 3445 | ret = cmd_enable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
54d01ffb DG |
3446 | &cmd_ctx->lsm->u.channel.chan); |
3447 | break; | |
3448 | } | |
3449 | case LTTNG_ENABLE_EVENT: | |
3450 | { | |
3451 | ret = cmd_enable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3452 | cmd_ctx->lsm->u.enable.channel_name, | |
3453 | &cmd_ctx->lsm->u.enable.event); | |
3454 | break; | |
3455 | } | |
3456 | case LTTNG_ENABLE_ALL_EVENT: | |
3457 | { | |
2bdd86d4 | 3458 | DBG("Enabling all events"); |
54d01ffb DG |
3459 | |
3460 | ret = cmd_enable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
8c9ae521 DG |
3461 | cmd_ctx->lsm->u.enable.channel_name, |
3462 | cmd_ctx->lsm->u.enable.event.type); | |
54d01ffb DG |
3463 | break; |
3464 | } | |
052da939 | 3465 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3466 | { |
9f19cc17 | 3467 | struct lttng_event *events; |
54d01ffb | 3468 | ssize_t nb_events; |
052da939 | 3469 | |
54d01ffb DG |
3470 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
3471 | if (nb_events < 0) { | |
3472 | ret = -nb_events; | |
3473 | goto error; | |
2ef84c95 DG |
3474 | } |
3475 | ||
3476 | /* | |
3477 | * Setup lttng message with payload size set to the event list size in | |
3478 | * bytes and then copy list into the llm payload. | |
3479 | */ | |
052da939 | 3480 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3481 | if (ret < 0) { |
052da939 | 3482 | free(events); |
2ef84c95 DG |
3483 | goto setup_error; |
3484 | } | |
3485 | ||
3486 | /* Copy event list into message payload */ | |
9f19cc17 | 3487 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3488 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3489 | |
9f19cc17 | 3490 | free(events); |
2ef84c95 DG |
3491 | |
3492 | ret = LTTCOMM_OK; | |
3493 | break; | |
3494 | } | |
f3ed775e | 3495 | case LTTNG_START_TRACE: |
8c0faa1d | 3496 | { |
54d01ffb | 3497 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3498 | break; |
3499 | } | |
f3ed775e | 3500 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3501 | { |
54d01ffb | 3502 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3503 | break; |
3504 | } | |
5e16da05 MD |
3505 | case LTTNG_CREATE_SESSION: |
3506 | { | |
54d01ffb | 3507 | ret = cmd_create_session(cmd_ctx->lsm->session.name, |
6df2e2c9 | 3508 | cmd_ctx->lsm->session.path, &cmd_ctx->creds); |
5e16da05 MD |
3509 | break; |
3510 | } | |
3511 | case LTTNG_DESTROY_SESSION: | |
3512 | { | |
54d01ffb DG |
3513 | ret = cmd_destroy_session(cmd_ctx->session, |
3514 | cmd_ctx->lsm->session.name); | |
5461b305 | 3515 | break; |
5e16da05 | 3516 | } |
9f19cc17 | 3517 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3518 | { |
54d01ffb DG |
3519 | ssize_t nb_dom; |
3520 | struct lttng_domain *domains; | |
5461b305 | 3521 | |
54d01ffb DG |
3522 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3523 | if (nb_dom < 0) { | |
3524 | ret = -nb_dom; | |
3525 | goto error; | |
ce3d728c | 3526 | } |
520ff687 | 3527 | |
54d01ffb | 3528 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 DG |
3529 | if (ret < 0) { |
3530 | goto setup_error; | |
520ff687 | 3531 | } |
57167058 | 3532 | |
54d01ffb DG |
3533 | /* Copy event list into message payload */ |
3534 | memcpy(cmd_ctx->llm->payload, domains, | |
3535 | nb_dom * sizeof(struct lttng_domain)); | |
3536 | ||
3537 | free(domains); | |
5e16da05 | 3538 | |
5461b305 | 3539 | ret = LTTCOMM_OK; |
5e16da05 MD |
3540 | break; |
3541 | } | |
9f19cc17 | 3542 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3543 | { |
54d01ffb DG |
3544 | size_t nb_chan; |
3545 | struct lttng_channel *channels; | |
3546 | ||
b551a063 DG |
3547 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3548 | cmd_ctx->session, &channels); | |
54d01ffb DG |
3549 | if (nb_chan < 0) { |
3550 | ret = -nb_chan; | |
3551 | goto error; | |
5461b305 | 3552 | } |
ca95a216 | 3553 | |
54d01ffb | 3554 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 DG |
3555 | if (ret < 0) { |
3556 | goto setup_error; | |
3557 | } | |
9f19cc17 | 3558 | |
54d01ffb DG |
3559 | /* Copy event list into message payload */ |
3560 | memcpy(cmd_ctx->llm->payload, channels, | |
3561 | nb_chan * sizeof(struct lttng_channel)); | |
3562 | ||
3563 | free(channels); | |
9f19cc17 DG |
3564 | |
3565 | ret = LTTCOMM_OK; | |
5461b305 | 3566 | break; |
5e16da05 | 3567 | } |
9f19cc17 | 3568 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3569 | { |
b551a063 | 3570 | ssize_t nb_event; |
684d34d2 | 3571 | struct lttng_event *events = NULL; |
9f19cc17 | 3572 | |
b551a063 | 3573 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3574 | cmd_ctx->lsm->u.list.channel_name, &events); |
3575 | if (nb_event < 0) { | |
3576 | ret = -nb_event; | |
3577 | goto error; | |
5461b305 | 3578 | } |
ca95a216 | 3579 | |
54d01ffb | 3580 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 DG |
3581 | if (ret < 0) { |
3582 | goto setup_error; | |
3583 | } | |
9f19cc17 | 3584 | |
54d01ffb DG |
3585 | /* Copy event list into message payload */ |
3586 | memcpy(cmd_ctx->llm->payload, events, | |
3587 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3588 | |
54d01ffb | 3589 | free(events); |
9f19cc17 DG |
3590 | |
3591 | ret = LTTCOMM_OK; | |
5461b305 | 3592 | break; |
5e16da05 MD |
3593 | } |
3594 | case LTTNG_LIST_SESSIONS: | |
3595 | { | |
8e0af1b4 | 3596 | unsigned int nr_sessions; |
5461b305 | 3597 | |
8e0af1b4 | 3598 | session_lock_list(); |
ca4537d3 | 3599 | nr_sessions = lttng_sessions_count(cmd_ctx->creds.uid, cmd_ctx->creds.gid); |
d32fb093 | 3600 | |
8e0af1b4 | 3601 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3602 | if (ret < 0) { |
54d01ffb | 3603 | session_unlock_list(); |
5461b305 | 3604 | goto setup_error; |
e065084a | 3605 | } |
5e16da05 | 3606 | |
6c9cc2ab | 3607 | /* Filled the session array */ |
8e0af1b4 | 3608 | list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
ca4537d3 | 3609 | cmd_ctx->creds.uid, cmd_ctx->creds.gid); |
6c9cc2ab | 3610 | |
54d01ffb | 3611 | session_unlock_list(); |
5e16da05 | 3612 | |
5461b305 | 3613 | ret = LTTCOMM_OK; |
5e16da05 MD |
3614 | break; |
3615 | } | |
d0254c7c MD |
3616 | case LTTNG_CALIBRATE: |
3617 | { | |
54d01ffb DG |
3618 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3619 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3620 | break; |
3621 | } | |
d9800920 DG |
3622 | case LTTNG_REGISTER_CONSUMER: |
3623 | { | |
54d01ffb DG |
3624 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3625 | cmd_ctx->lsm->u.reg.path); | |
d9800920 DG |
3626 | break; |
3627 | } | |
5e16da05 | 3628 | default: |
5e16da05 | 3629 | ret = LTTCOMM_UND; |
5461b305 | 3630 | break; |
fac6795d DG |
3631 | } |
3632 | ||
5461b305 | 3633 | error: |
5461b305 DG |
3634 | if (cmd_ctx->llm == NULL) { |
3635 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3636 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3637 | goto setup_error; |
3638 | } | |
3639 | } | |
54d01ffb | 3640 | /* Set return code */ |
5461b305 | 3641 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3642 | setup_error: |
b5541356 | 3643 | if (cmd_ctx->session) { |
54d01ffb | 3644 | session_unlock(cmd_ctx->session); |
b5541356 | 3645 | } |
54d01ffb | 3646 | init_setup_error: |
8028d920 | 3647 | return ret; |
fac6795d DG |
3648 | } |
3649 | ||
1d4b027a | 3650 | /* |
d063d709 DG |
3651 | * This thread manage all clients request using the unix client socket for |
3652 | * communication. | |
1d4b027a DG |
3653 | */ |
3654 | static void *thread_manage_clients(void *data) | |
3655 | { | |
a4b35e07 | 3656 | int sock = -1, ret, i, pollfd; |
5eb91c98 | 3657 | uint32_t revents, nb_fd; |
273ea72c | 3658 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3659 | struct lttng_poll_event events; |
1d4b027a DG |
3660 | |
3661 | DBG("[thread] Manage client started"); | |
3662 | ||
f6a9efaa DG |
3663 | rcu_register_thread(); |
3664 | ||
1d4b027a DG |
3665 | ret = lttcomm_listen_unix_sock(client_sock); |
3666 | if (ret < 0) { | |
3667 | goto error; | |
3668 | } | |
3669 | ||
5eb91c98 DG |
3670 | /* |
3671 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3672 | * more will be added to this poll set. | |
3673 | */ | |
3674 | ret = create_thread_poll_set(&events, 2); | |
3675 | if (ret < 0) { | |
3676 | goto error; | |
3677 | } | |
273ea72c | 3678 | |
5eb91c98 DG |
3679 | /* Add the application registration socket */ |
3680 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3681 | if (ret < 0) { | |
3682 | goto error; | |
3683 | } | |
273ea72c | 3684 | |
bbd973c2 DG |
3685 | /* |
3686 | * Notify parent pid that we are ready to accept command for client side. | |
1d4b027a DG |
3687 | */ |
3688 | if (opt_sig_parent) { | |
8db8d1dc | 3689 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3690 | } |
3691 | ||
3692 | while (1) { | |
1d4b027a | 3693 | DBG("Accepting client command ..."); |
273ea72c | 3694 | |
5eb91c98 DG |
3695 | nb_fd = LTTNG_POLL_GETNB(&events); |
3696 | ||
273ea72c | 3697 | /* Inifinite blocking call, waiting for transmission */ |
a8b0b341 | 3698 | restart: |
5eb91c98 | 3699 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 3700 | if (ret < 0) { |
a8b0b341 MD |
3701 | /* |
3702 | * Restart interrupted system call. | |
3703 | */ | |
3704 | if (errno == EINTR) { | |
3705 | goto restart; | |
3706 | } | |
273ea72c DG |
3707 | goto error; |
3708 | } | |
3709 | ||
5eb91c98 DG |
3710 | for (i = 0; i < nb_fd; i++) { |
3711 | /* Fetch once the poll data */ | |
3712 | revents = LTTNG_POLL_GETEV(&events, i); | |
3713 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3714 | ||
3715 | /* Thread quit pipe has been closed. Killing thread. */ | |
3716 | ret = check_thread_quit_pipe(pollfd, revents); | |
3717 | if (ret) { | |
3718 | goto error; | |
3719 | } | |
3720 | ||
3721 | /* Event on the registration socket */ | |
3722 | if (pollfd == client_sock) { | |
3723 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3724 | ERR("Client socket poll error"); | |
3725 | goto error; | |
3726 | } | |
3727 | } | |
3728 | } | |
3729 | ||
3730 | DBG("Wait for client response"); | |
3731 | ||
3732 | sock = lttcomm_accept_unix_sock(client_sock); | |
3733 | if (sock < 0) { | |
273ea72c | 3734 | goto error; |
273ea72c DG |
3735 | } |
3736 | ||
be040666 DG |
3737 | /* Set socket option for credentials retrieval */ |
3738 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3739 | if (ret < 0) { | |
3740 | goto error; | |
3741 | } | |
3742 | ||
5eb91c98 | 3743 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3744 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3745 | if (cmd_ctx == NULL) { |
76d7553f | 3746 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 3747 | goto error; |
5eb91c98 | 3748 | } |
1d4b027a | 3749 | |
5eb91c98 | 3750 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3751 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3752 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 3753 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3754 | goto error; |
3755 | } | |
1d4b027a | 3756 | |
5eb91c98 DG |
3757 | cmd_ctx->llm = NULL; |
3758 | cmd_ctx->session = NULL; | |
1d4b027a | 3759 | |
5eb91c98 DG |
3760 | /* |
3761 | * Data is received from the lttng client. The struct | |
3762 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3763 | * the client. | |
3764 | */ | |
3765 | DBG("Receiving data from client ..."); | |
be040666 DG |
3766 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3767 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3768 | if (ret <= 0) { |
3769 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
3770 | ret = close(sock); |
3771 | if (ret) { | |
3772 | PERROR("close"); | |
3773 | } | |
3774 | sock = -1; | |
5eb91c98 DG |
3775 | free(cmd_ctx); |
3776 | continue; | |
3777 | } | |
1d4b027a | 3778 | |
5eb91c98 DG |
3779 | // TODO: Validate cmd_ctx including sanity check for |
3780 | // security purpose. | |
f7776ea7 | 3781 | |
f6a9efaa | 3782 | rcu_thread_online(); |
5eb91c98 DG |
3783 | /* |
3784 | * This function dispatch the work to the kernel or userspace tracer | |
3785 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3786 | * informations for the client. The command context struct contains | |
3787 | * everything this function may needs. | |
3788 | */ | |
3789 | ret = process_client_msg(cmd_ctx); | |
f6a9efaa | 3790 | rcu_thread_offline(); |
5eb91c98 | 3791 | if (ret < 0) { |
bbd973c2 | 3792 | /* |
5eb91c98 | 3793 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3794 | * this point, ret < 0 means that a zmalloc failed |
5eb91c98 | 3795 | * (ENOMEM). Error detected but still accept command. |
bbd973c2 | 3796 | */ |
bbd973c2 | 3797 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3798 | continue; |
3799 | } | |
d6e4fca4 | 3800 | |
54d01ffb DG |
3801 | DBG("Sending response (size: %d, retcode: %s)", |
3802 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3803 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3804 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3805 | if (ret < 0) { |
3806 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3807 | } |
1d4b027a | 3808 | |
5eb91c98 | 3809 | /* End of transmission */ |
76d7553f MD |
3810 | ret = close(sock); |
3811 | if (ret) { | |
3812 | PERROR("close"); | |
3813 | } | |
3814 | sock = -1; | |
be040666 DG |
3815 | |
3816 | clean_command_ctx(&cmd_ctx); | |
273ea72c DG |
3817 | } |
3818 | ||
5eb91c98 DG |
3819 | error: |
3820 | DBG("Client thread dying"); | |
273ea72c | 3821 | unlink(client_unix_sock_path); |
76d7553f MD |
3822 | if (client_sock >= 0) { |
3823 | ret = close(client_sock); | |
3824 | if (ret) { | |
3825 | PERROR("close"); | |
3826 | } | |
a4b35e07 MD |
3827 | } |
3828 | if (sock >= 0) { | |
76d7553f MD |
3829 | ret = close(sock); |
3830 | if (ret) { | |
3831 | PERROR("close"); | |
3832 | } | |
a4b35e07 | 3833 | } |
273ea72c | 3834 | |
5eb91c98 | 3835 | lttng_poll_clean(&events); |
a2fb29a5 | 3836 | clean_command_ctx(&cmd_ctx); |
f6a9efaa DG |
3837 | |
3838 | rcu_unregister_thread(); | |
1d4b027a DG |
3839 | return NULL; |
3840 | } | |
3841 | ||
3842 | ||
fac6795d DG |
3843 | /* |
3844 | * usage function on stderr | |
3845 | */ | |
3846 | static void usage(void) | |
3847 | { | |
b716ce68 | 3848 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
3849 | fprintf(stderr, " -h, --help Display this usage.\n"); |
3850 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
3851 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
3852 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
3853 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
3854 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
3855 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
3856 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
3857 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
3858 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
3859 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
3860 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
3861 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
3862 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
3863 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
3864 | fprintf(stderr, " -V, --version Show version number.\n"); | |
3865 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
3866 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
3867 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
3bd1e081 | 3868 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 3869 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
fac6795d DG |
3870 | } |
3871 | ||
3872 | /* | |
3873 | * daemon argument parsing | |
3874 | */ | |
3875 | static int parse_args(int argc, char **argv) | |
3876 | { | |
3877 | int c; | |
3878 | ||
3879 | static struct option long_options[] = { | |
3880 | { "client-sock", 1, 0, 'c' }, | |
3881 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
3882 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
3883 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
7753dea8 MD |
3884 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, |
3885 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
ebaeda94 MD |
3886 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, |
3887 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
3888 | { "consumerd32-path", 1, 0, 'u' }, | |
3889 | { "consumerd32-libdir", 1, 0, 'U' }, | |
3890 | { "consumerd64-path", 1, 0, 't' }, | |
3891 | { "consumerd64-libdir", 1, 0, 'T' }, | |
fac6795d | 3892 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 3893 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
3894 | { "help", 0, 0, 'h' }, |
3895 | { "group", 1, 0, 'g' }, | |
3896 | { "version", 0, 0, 'V' }, | |
75462a81 | 3897 | { "quiet", 0, 0, 'q' }, |
3f9947db | 3898 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 3899 | { "verbose-consumer", 0, 0, 'Z' }, |
4fba7219 | 3900 | { "no-kernel", 0, 0, 'N' }, |
fac6795d DG |
3901 | { NULL, 0, 0, 0 } |
3902 | }; | |
3903 | ||
3904 | while (1) { | |
3905 | int option_index = 0; | |
4fba7219 | 3906 | c = getopt_long(argc, argv, "dhqvVSN" "a:c:g:s:C:E:D:F:Z:u:t", |
54d01ffb | 3907 | long_options, &option_index); |
fac6795d DG |
3908 | if (c == -1) { |
3909 | break; | |
3910 | } | |
3911 | ||
3912 | switch (c) { | |
3913 | case 0: | |
3914 | fprintf(stderr, "option %s", long_options[option_index].name); | |
3915 | if (optarg) { | |
3916 | fprintf(stderr, " with arg %s\n", optarg); | |
3917 | } | |
3918 | break; | |
b716ce68 | 3919 | case 'c': |
fac6795d DG |
3920 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
3921 | break; | |
3922 | case 'a': | |
3923 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
3924 | break; | |
3925 | case 'd': | |
3926 | opt_daemon = 1; | |
3927 | break; | |
3928 | case 'g': | |
fb09408a | 3929 | opt_tracing_group = optarg; |
fac6795d DG |
3930 | break; |
3931 | case 'h': | |
3932 | usage(); | |
3933 | exit(EXIT_FAILURE); | |
3934 | case 'V': | |
3935 | fprintf(stdout, "%s\n", VERSION); | |
3936 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
3937 | case 'S': |
3938 | opt_sig_parent = 1; | |
3939 | break; | |
d6f42150 | 3940 | case 'E': |
3bd1e081 | 3941 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
3942 | break; |
3943 | case 'C': | |
3bd1e081 MD |
3944 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3945 | break; | |
3946 | case 'F': | |
7753dea8 | 3947 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
3bd1e081 MD |
3948 | break; |
3949 | case 'D': | |
7753dea8 MD |
3950 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3951 | break; | |
3952 | case 'H': | |
3953 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
3954 | break; | |
3955 | case 'G': | |
3956 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 3957 | break; |
4fba7219 DG |
3958 | case 'N': |
3959 | opt_no_kernel = 1; | |
3960 | break; | |
75462a81 DG |
3961 | case 'q': |
3962 | opt_quiet = 1; | |
3963 | break; | |
3f9947db | 3964 | case 'v': |
53086306 DG |
3965 | /* Verbose level can increase using multiple -v */ |
3966 | opt_verbose += 1; | |
3f9947db | 3967 | break; |
31f73cc9 | 3968 | case 'Z': |
3bd1e081 | 3969 | opt_verbose_consumer += 1; |
31f73cc9 | 3970 | break; |
fb09408a | 3971 | case 'u': |
fc7a59ce | 3972 | consumerd32_bin= optarg; |
ebaeda94 MD |
3973 | break; |
3974 | case 'U': | |
3975 | consumerd32_libdir = optarg; | |
7753dea8 MD |
3976 | break; |
3977 | case 't': | |
fc7a59ce | 3978 | consumerd64_bin = optarg; |
ebaeda94 MD |
3979 | break; |
3980 | case 'T': | |
3981 | consumerd64_libdir = optarg; | |
fb09408a | 3982 | break; |
fac6795d DG |
3983 | default: |
3984 | /* Unknown option or other error. | |
3985 | * Error is printed by getopt, just return */ | |
3986 | return -1; | |
3987 | } | |
3988 | } | |
3989 | ||
3990 | return 0; | |
3991 | } | |
3992 | ||
3993 | /* | |
d063d709 | 3994 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
3995 | * apps_sock - The communication socket for all UST apps. |
3996 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 3997 | */ |
cf3af59e | 3998 | static int init_daemon_socket(void) |
fac6795d DG |
3999 | { |
4000 | int ret = 0; | |
4001 | mode_t old_umask; | |
4002 | ||
4003 | old_umask = umask(0); | |
4004 | ||
4005 | /* Create client tool unix socket */ | |
d6f42150 DG |
4006 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
4007 | if (client_sock < 0) { | |
4008 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
4009 | ret = -1; |
4010 | goto end; | |
4011 | } | |
4012 | ||
4013 | /* File permission MUST be 660 */ | |
4014 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4015 | if (ret < 0) { | |
d6f42150 | 4016 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 4017 | PERROR("chmod"); |
fac6795d DG |
4018 | goto end; |
4019 | } | |
4020 | ||
4021 | /* Create the application unix socket */ | |
d6f42150 DG |
4022 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
4023 | if (apps_sock < 0) { | |
4024 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
4025 | ret = -1; |
4026 | goto end; | |
4027 | } | |
4028 | ||
d6f42150 | 4029 | /* File permission MUST be 666 */ |
54d01ffb DG |
4030 | ret = chmod(apps_unix_sock_path, |
4031 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 4032 | if (ret < 0) { |
d6f42150 | 4033 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 4034 | PERROR("chmod"); |
fac6795d DG |
4035 | goto end; |
4036 | } | |
4037 | ||
4038 | end: | |
4039 | umask(old_umask); | |
4040 | return ret; | |
4041 | } | |
4042 | ||
4043 | /* | |
54d01ffb DG |
4044 | * Check if the global socket is available, and if a daemon is answering at the |
4045 | * other side. If yes, error is returned. | |
fac6795d | 4046 | */ |
cf3af59e | 4047 | static int check_existing_daemon(void) |
fac6795d | 4048 | { |
7d8234d9 | 4049 | /* Is there anybody out there ? */ |
099e26bd | 4050 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 4051 | return -EEXIST; |
099e26bd | 4052 | } |
b09c7c76 DG |
4053 | |
4054 | return 0; | |
fac6795d DG |
4055 | } |
4056 | ||
fac6795d | 4057 | /* |
d063d709 | 4058 | * Set the tracing group gid onto the client socket. |
5e16da05 | 4059 | * |
d063d709 | 4060 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 4061 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 4062 | */ |
be040666 | 4063 | static int set_permissions(char *rundir) |
fac6795d DG |
4064 | { |
4065 | int ret; | |
996b65c8 | 4066 | gid_t gid; |
fac6795d | 4067 | |
996b65c8 MD |
4068 | gid = allowed_group(); |
4069 | if (gid < 0) { | |
be040666 DG |
4070 | WARN("No tracing group detected"); |
4071 | ret = 0; | |
fac6795d DG |
4072 | goto end; |
4073 | } | |
4074 | ||
d6f42150 | 4075 | /* Set lttng run dir */ |
be040666 | 4076 | ret = chown(rundir, 0, gid); |
d6f42150 | 4077 | if (ret < 0) { |
be040666 | 4078 | ERR("Unable to set group on %s", rundir); |
76d7553f | 4079 | PERROR("chown"); |
d6f42150 DG |
4080 | } |
4081 | ||
d1613cf5 | 4082 | /* Ensure tracing group can search the run dir */ |
61076f74 | 4083 | ret = chmod(rundir, S_IRWXU | S_IXGRP | S_IXOTH); |
d1613cf5 JN |
4084 | if (ret < 0) { |
4085 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 4086 | PERROR("chmod"); |
d1613cf5 JN |
4087 | } |
4088 | ||
d6f42150 | 4089 | /* lttng client socket path */ |
996b65c8 | 4090 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 4091 | if (ret < 0) { |
d6f42150 | 4092 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 4093 | PERROR("chown"); |
d6f42150 DG |
4094 | } |
4095 | ||
3bd1e081 MD |
4096 | /* kconsumer error socket path */ |
4097 | ret = chown(kconsumer_data.err_unix_sock_path, 0, gid); | |
d6f42150 | 4098 | if (ret < 0) { |
3bd1e081 | 4099 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 4100 | PERROR("chown"); |
3bd1e081 MD |
4101 | } |
4102 | ||
7753dea8 MD |
4103 | /* 64-bit ustconsumer error socket path */ |
4104 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, gid); | |
4105 | if (ret < 0) { | |
4106 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 4107 | PERROR("chown"); |
7753dea8 MD |
4108 | } |
4109 | ||
4110 | /* 32-bit ustconsumer compat32 error socket path */ | |
4111 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, gid); | |
3bd1e081 | 4112 | if (ret < 0) { |
7753dea8 | 4113 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 4114 | PERROR("chown"); |
fac6795d DG |
4115 | } |
4116 | ||
d6f42150 | 4117 | DBG("All permissions are set"); |
e07ae692 | 4118 | |
fac6795d DG |
4119 | end: |
4120 | return ret; | |
4121 | } | |
4122 | ||
7a485870 | 4123 | /* |
d063d709 | 4124 | * Create the pipe used to wake up the kernel thread. |
76d7553f | 4125 | * Closed in cleanup(). |
7a485870 DG |
4126 | */ |
4127 | static int create_kernel_poll_pipe(void) | |
4128 | { | |
ca4537d3 | 4129 | return pipe2(kernel_poll_pipe, O_CLOEXEC); |
7a485870 DG |
4130 | } |
4131 | ||
099e26bd DG |
4132 | /* |
4133 | * Create the application command pipe to wake thread_manage_apps. | |
76d7553f | 4134 | * Closed in cleanup(). |
099e26bd DG |
4135 | */ |
4136 | static int create_apps_cmd_pipe(void) | |
4137 | { | |
ca4537d3 | 4138 | return pipe2(apps_cmd_pipe, O_CLOEXEC); |
099e26bd DG |
4139 | } |
4140 | ||
d6f42150 | 4141 | /* |
d063d709 | 4142 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 4143 | */ |
67e40797 | 4144 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
4145 | { |
4146 | int ret; | |
4147 | ||
67e40797 DG |
4148 | DBG3("Creating LTTng run directory: %s", rundir); |
4149 | ||
d1613cf5 | 4150 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 4151 | if (ret < 0) { |
b1f11e69 | 4152 | if (errno != EEXIST) { |
67e40797 | 4153 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
4154 | goto error; |
4155 | } else { | |
4156 | ret = 0; | |
4157 | } | |
d6f42150 DG |
4158 | } |
4159 | ||
4160 | error: | |
4161 | return ret; | |
4162 | } | |
4163 | ||
4164 | /* | |
d063d709 DG |
4165 | * Setup sockets and directory needed by the kconsumerd communication with the |
4166 | * session daemon. | |
d6f42150 | 4167 | */ |
67e40797 DG |
4168 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
4169 | const char *rundir) | |
d6f42150 DG |
4170 | { |
4171 | int ret; | |
67e40797 | 4172 | char path[PATH_MAX]; |
d6f42150 | 4173 | |
67e40797 | 4174 | switch (consumer_data->type) { |
7753dea8 | 4175 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 4176 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
4177 | break; |
4178 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 4179 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
4180 | break; |
4181 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 4182 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
4183 | break; |
4184 | default: | |
4185 | ERR("Consumer type unknown"); | |
4186 | ret = -EINVAL; | |
4187 | goto error; | |
d6f42150 DG |
4188 | } |
4189 | ||
67e40797 DG |
4190 | DBG2("Creating consumer directory: %s", path); |
4191 | ||
d1613cf5 | 4192 | ret = mkdir(path, S_IRWXU); |
d6f42150 | 4193 | if (ret < 0) { |
6beb2242 | 4194 | if (errno != EEXIST) { |
3bd1e081 | 4195 | ERR("Failed to create %s", path); |
6beb2242 DG |
4196 | goto error; |
4197 | } | |
4198 | ret = 0; | |
d6f42150 DG |
4199 | } |
4200 | ||
4201 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
4202 | consumer_data->err_sock = |
4203 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
4204 | if (consumer_data->err_sock < 0) { | |
4205 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
4206 | ret = -1; |
4207 | goto error; | |
4208 | } | |
4209 | ||
4210 | /* File permission MUST be 660 */ | |
3bd1e081 | 4211 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 4212 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 4213 | if (ret < 0) { |
3bd1e081 | 4214 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 4215 | PERROR("chmod"); |
d6f42150 DG |
4216 | goto error; |
4217 | } | |
4218 | ||
4219 | error: | |
4220 | return ret; | |
4221 | } | |
4222 | ||
fac6795d | 4223 | /* |
d063d709 | 4224 | * Signal handler for the daemon |
cf3af59e | 4225 | * |
54d01ffb DG |
4226 | * Simply stop all worker threads, leaving main() return gracefully after |
4227 | * joining all threads and calling cleanup(). | |
fac6795d DG |
4228 | */ |
4229 | static void sighandler(int sig) | |
4230 | { | |
4231 | switch (sig) { | |
cf3af59e | 4232 | case SIGPIPE: |
af87c45a | 4233 | DBG("SIGPIPE caught"); |
cf3af59e MD |
4234 | return; |
4235 | case SIGINT: | |
af87c45a | 4236 | DBG("SIGINT caught"); |
cf3af59e MD |
4237 | stop_threads(); |
4238 | break; | |
4239 | case SIGTERM: | |
af87c45a | 4240 | DBG("SIGTERM caught"); |
cf3af59e MD |
4241 | stop_threads(); |
4242 | break; | |
4243 | default: | |
4244 | break; | |
fac6795d | 4245 | } |
fac6795d DG |
4246 | } |
4247 | ||
4248 | /* | |
d063d709 | 4249 | * Setup signal handler for : |
1d4b027a | 4250 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 4251 | */ |
1d4b027a | 4252 | static int set_signal_handler(void) |
fac6795d | 4253 | { |
1d4b027a DG |
4254 | int ret = 0; |
4255 | struct sigaction sa; | |
4256 | sigset_t sigset; | |
fac6795d | 4257 | |
1d4b027a | 4258 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 4259 | PERROR("sigemptyset"); |
1d4b027a DG |
4260 | return ret; |
4261 | } | |
d6f42150 | 4262 | |
1d4b027a DG |
4263 | sa.sa_handler = sighandler; |
4264 | sa.sa_mask = sigset; | |
4265 | sa.sa_flags = 0; | |
4266 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 4267 | PERROR("sigaction"); |
1d4b027a | 4268 | return ret; |
d6f42150 DG |
4269 | } |
4270 | ||
1d4b027a | 4271 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 4272 | PERROR("sigaction"); |
1d4b027a | 4273 | return ret; |
d6f42150 | 4274 | } |
aaf26714 | 4275 | |
1d4b027a | 4276 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 4277 | PERROR("sigaction"); |
1d4b027a | 4278 | return ret; |
8c0faa1d DG |
4279 | } |
4280 | ||
1d4b027a DG |
4281 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
4282 | ||
4283 | return ret; | |
fac6795d DG |
4284 | } |
4285 | ||
f3ed775e | 4286 | /* |
d063d709 DG |
4287 | * Set open files limit to unlimited. This daemon can open a large number of |
4288 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
4289 | */ |
4290 | static void set_ulimit(void) | |
4291 | { | |
4292 | int ret; | |
4293 | struct rlimit lim; | |
4294 | ||
a88df331 | 4295 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
4296 | lim.rlim_cur = 65535; |
4297 | lim.rlim_max = 65535; | |
4298 | ||
4299 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
4300 | if (ret < 0) { | |
76d7553f | 4301 | PERROR("failed to set open files limit"); |
f3ed775e DG |
4302 | } |
4303 | } | |
4304 | ||
fac6795d DG |
4305 | /* |
4306 | * main | |
4307 | */ | |
4308 | int main(int argc, char **argv) | |
4309 | { | |
fac6795d DG |
4310 | int ret = 0; |
4311 | void *status; | |
b082db07 | 4312 | const char *home_path; |
fac6795d | 4313 | |
335a95b7 MD |
4314 | init_kernel_workarounds(); |
4315 | ||
f6a9efaa DG |
4316 | rcu_register_thread(); |
4317 | ||
273ea72c | 4318 | /* Create thread quit pipe */ |
cf3af59e MD |
4319 | if ((ret = init_thread_quit_pipe()) < 0) { |
4320 | goto error; | |
273ea72c DG |
4321 | } |
4322 | ||
7753dea8 | 4323 | setup_consumerd_path(); |
fb09408a | 4324 | |
fac6795d DG |
4325 | /* Parse arguments */ |
4326 | progname = argv[0]; | |
4327 | if ((ret = parse_args(argc, argv) < 0)) { | |
cf3af59e | 4328 | goto error; |
fac6795d DG |
4329 | } |
4330 | ||
4331 | /* Daemonize */ | |
4332 | if (opt_daemon) { | |
53094c05 DG |
4333 | ret = daemon(0, 0); |
4334 | if (ret < 0) { | |
76d7553f | 4335 | PERROR("daemon"); |
cf3af59e | 4336 | goto error; |
53094c05 | 4337 | } |
fac6795d DG |
4338 | } |
4339 | ||
4340 | /* Check if daemon is UID = 0 */ | |
4341 | is_root = !getuid(); | |
4342 | ||
fac6795d | 4343 | if (is_root) { |
990570ed | 4344 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
4345 | |
4346 | /* Create global run dir with root access */ | |
4347 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 4348 | if (ret < 0) { |
cf3af59e | 4349 | goto error; |
d6f42150 DG |
4350 | } |
4351 | ||
fac6795d | 4352 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
4353 | snprintf(apps_unix_sock_path, PATH_MAX, |
4354 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
4355 | } |
4356 | ||
4357 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
4358 | snprintf(client_unix_sock_path, PATH_MAX, |
4359 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
4360 | } | |
0fdd1e2c DG |
4361 | |
4362 | /* Set global SHM for ust */ | |
4363 | if (strlen(wait_shm_path) == 0) { | |
4364 | snprintf(wait_shm_path, PATH_MAX, | |
4365 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
4366 | } | |
67e40797 DG |
4367 | |
4368 | /* Setup kernel consumerd path */ | |
4369 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4370 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 4371 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4372 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4373 | |
4374 | DBG2("Kernel consumer err path: %s", | |
4375 | kconsumer_data.err_unix_sock_path); | |
4376 | DBG2("Kernel consumer cmd path: %s", | |
4377 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 4378 | } else { |
b082db07 DG |
4379 | home_path = get_home_dir(); |
4380 | if (home_path == NULL) { | |
273ea72c DG |
4381 | /* TODO: Add --socket PATH option */ |
4382 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
4383 | ret = -EPERM; |
4384 | goto error; | |
b082db07 DG |
4385 | } |
4386 | ||
67e40797 DG |
4387 | /* |
4388 | * Create rundir from home path. This will create something like | |
4389 | * $HOME/.lttng | |
4390 | */ | |
990570ed | 4391 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
4392 | if (ret < 0) { |
4393 | ret = -ENOMEM; | |
4394 | goto error; | |
4395 | } | |
4396 | ||
4397 | ret = create_lttng_rundir(rundir); | |
4398 | if (ret < 0) { | |
4399 | goto error; | |
4400 | } | |
4401 | ||
fac6795d | 4402 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 4403 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 4404 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
4405 | } |
4406 | ||
4407 | /* Set the cli tool unix socket path */ | |
4408 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 4409 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 4410 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 4411 | } |
0fdd1e2c DG |
4412 | |
4413 | /* Set global SHM for ust */ | |
4414 | if (strlen(wait_shm_path) == 0) { | |
4415 | snprintf(wait_shm_path, PATH_MAX, | |
4416 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, geteuid()); | |
4417 | } | |
fac6795d DG |
4418 | } |
4419 | ||
847177cd DG |
4420 | DBG("Client socket path %s", client_unix_sock_path); |
4421 | DBG("Application socket path %s", apps_unix_sock_path); | |
67e40797 DG |
4422 | DBG("LTTng run directory path: %s", rundir); |
4423 | ||
4424 | /* 32 bits consumerd path setup */ | |
4425 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4426 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 4427 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4428 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4429 | |
4430 | DBG2("UST consumer 32 bits err path: %s", | |
4431 | ustconsumer32_data.err_unix_sock_path); | |
4432 | DBG2("UST consumer 32 bits cmd path: %s", | |
4433 | ustconsumer32_data.cmd_unix_sock_path); | |
4434 | ||
4435 | /* 64 bits consumerd path setup */ | |
4436 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4437 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 4438 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4439 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4440 | |
4441 | DBG2("UST consumer 64 bits err path: %s", | |
4442 | ustconsumer64_data.err_unix_sock_path); | |
4443 | DBG2("UST consumer 64 bits cmd path: %s", | |
4444 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 4445 | |
273ea72c | 4446 | /* |
7d8234d9 | 4447 | * See if daemon already exist. |
fac6795d | 4448 | */ |
7d8234d9 | 4449 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4450 | ERR("Already running daemon.\n"); |
273ea72c | 4451 | /* |
cf3af59e MD |
4452 | * We do not goto exit because we must not cleanup() |
4453 | * because a daemon is already running. | |
ab118b20 | 4454 | */ |
cf3af59e | 4455 | goto error; |
a88df331 DG |
4456 | } |
4457 | ||
54d01ffb | 4458 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4459 | |
4460 | /* | |
4461 | * These actions must be executed as root. We do that *after* setting up | |
4462 | * the sockets path because we MUST make the check for another daemon using | |
4463 | * those paths *before* trying to set the kernel consumer sockets and init | |
4464 | * kernel tracer. | |
4465 | */ | |
4466 | if (is_root) { | |
67e40797 | 4467 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4468 | if (ret < 0) { |
4469 | goto exit; | |
4470 | } | |
4471 | ||
a88df331 | 4472 | /* Setup kernel tracer */ |
4fba7219 DG |
4473 | if (!opt_no_kernel) { |
4474 | init_kernel_tracer(); | |
4475 | } | |
a88df331 DG |
4476 | |
4477 | /* Set ulimit for open files */ | |
4478 | set_ulimit(); | |
fac6795d DG |
4479 | } |
4480 | ||
67e40797 DG |
4481 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
4482 | if (ret < 0) { | |
4483 | goto exit; | |
4484 | } | |
4485 | ||
4486 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
4487 | if (ret < 0) { | |
4488 | goto exit; | |
4489 | } | |
4490 | ||
cf3af59e MD |
4491 | if ((ret = set_signal_handler()) < 0) { |
4492 | goto exit; | |
fac6795d DG |
4493 | } |
4494 | ||
d6f42150 | 4495 | /* Setup the needed unix socket */ |
cf3af59e MD |
4496 | if ((ret = init_daemon_socket()) < 0) { |
4497 | goto exit; | |
fac6795d DG |
4498 | } |
4499 | ||
4500 | /* Set credentials to socket */ | |
be040666 | 4501 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 4502 | goto exit; |
fac6795d DG |
4503 | } |
4504 | ||
5b8719f5 DG |
4505 | /* Get parent pid if -S, --sig-parent is specified. */ |
4506 | if (opt_sig_parent) { | |
4507 | ppid = getppid(); | |
4508 | } | |
4509 | ||
7a485870 | 4510 | /* Setup the kernel pipe for waking up the kernel thread */ |
cf3af59e MD |
4511 | if ((ret = create_kernel_poll_pipe()) < 0) { |
4512 | goto exit; | |
7a485870 DG |
4513 | } |
4514 | ||
099e26bd DG |
4515 | /* Setup the thread apps communication pipe. */ |
4516 | if ((ret = create_apps_cmd_pipe()) < 0) { | |
4517 | goto exit; | |
4518 | } | |
4519 | ||
4520 | /* Init UST command queue. */ | |
4521 | cds_wfq_init(&ust_cmd_queue.queue); | |
4522 | ||
f6a9efaa DG |
4523 | /* Init UST app hash table */ |
4524 | ust_app_ht_alloc(); | |
4525 | ||
273ea72c | 4526 | /* |
54d01ffb DG |
4527 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4528 | * statically declared in session.c | |
273ea72c | 4529 | */ |
54d01ffb | 4530 | session_list_ptr = session_get_list(); |
b5541356 | 4531 | |
5eb91c98 DG |
4532 | /* Set up max poll set size */ |
4533 | lttng_poll_set_max_size(); | |
4534 | ||
cf3af59e | 4535 | /* Create thread to manage the client socket */ |
099e26bd DG |
4536 | ret = pthread_create(&client_thread, NULL, |
4537 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 4538 | if (ret != 0) { |
76d7553f | 4539 | PERROR("pthread_create clients"); |
cf3af59e MD |
4540 | goto exit_client; |
4541 | } | |
fac6795d | 4542 | |
099e26bd DG |
4543 | /* Create thread to dispatch registration */ |
4544 | ret = pthread_create(&dispatch_thread, NULL, | |
4545 | thread_dispatch_ust_registration, (void *) NULL); | |
4546 | if (ret != 0) { | |
76d7553f | 4547 | PERROR("pthread_create dispatch"); |
099e26bd DG |
4548 | goto exit_dispatch; |
4549 | } | |
4550 | ||
4551 | /* Create thread to manage application registration. */ | |
4552 | ret = pthread_create(®_apps_thread, NULL, | |
4553 | thread_registration_apps, (void *) NULL); | |
4554 | if (ret != 0) { | |
76d7553f | 4555 | PERROR("pthread_create registration"); |
099e26bd DG |
4556 | goto exit_reg_apps; |
4557 | } | |
4558 | ||
cf3af59e | 4559 | /* Create thread to manage application socket */ |
54d01ffb DG |
4560 | ret = pthread_create(&apps_thread, NULL, |
4561 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 4562 | if (ret != 0) { |
76d7553f | 4563 | PERROR("pthread_create apps"); |
cf3af59e MD |
4564 | goto exit_apps; |
4565 | } | |
fac6795d | 4566 | |
cf3af59e | 4567 | /* Create kernel thread to manage kernel event */ |
54d01ffb DG |
4568 | ret = pthread_create(&kernel_thread, NULL, |
4569 | thread_manage_kernel, (void *) NULL); | |
cf3af59e | 4570 | if (ret != 0) { |
76d7553f | 4571 | PERROR("pthread_create kernel"); |
cf3af59e MD |
4572 | goto exit_kernel; |
4573 | } | |
7a485870 | 4574 | |
cf3af59e MD |
4575 | ret = pthread_join(kernel_thread, &status); |
4576 | if (ret != 0) { | |
76d7553f | 4577 | PERROR("pthread_join"); |
cf3af59e | 4578 | goto error; /* join error, exit without cleanup */ |
fac6795d DG |
4579 | } |
4580 | ||
cf3af59e MD |
4581 | exit_kernel: |
4582 | ret = pthread_join(apps_thread, &status); | |
4583 | if (ret != 0) { | |
76d7553f | 4584 | PERROR("pthread_join"); |
cf3af59e MD |
4585 | goto error; /* join error, exit without cleanup */ |
4586 | } | |
fac6795d | 4587 | |
cf3af59e | 4588 | exit_apps: |
099e26bd DG |
4589 | ret = pthread_join(reg_apps_thread, &status); |
4590 | if (ret != 0) { | |
76d7553f | 4591 | PERROR("pthread_join"); |
099e26bd DG |
4592 | goto error; /* join error, exit without cleanup */ |
4593 | } | |
4594 | ||
4595 | exit_reg_apps: | |
4596 | ret = pthread_join(dispatch_thread, &status); | |
4597 | if (ret != 0) { | |
76d7553f | 4598 | PERROR("pthread_join"); |
099e26bd DG |
4599 | goto error; /* join error, exit without cleanup */ |
4600 | } | |
4601 | ||
4602 | exit_dispatch: | |
cf3af59e MD |
4603 | ret = pthread_join(client_thread, &status); |
4604 | if (ret != 0) { | |
76d7553f | 4605 | PERROR("pthread_join"); |
cf3af59e MD |
4606 | goto error; /* join error, exit without cleanup */ |
4607 | } | |
4608 | ||
3bd1e081 | 4609 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 4610 | if (ret != 0) { |
76d7553f | 4611 | PERROR("join_consumer"); |
cf3af59e MD |
4612 | goto error; /* join error, exit without cleanup */ |
4613 | } | |
a88df331 | 4614 | |
cf3af59e | 4615 | exit_client: |
a88df331 | 4616 | exit: |
cf3af59e MD |
4617 | /* |
4618 | * cleanup() is called when no other thread is running. | |
4619 | */ | |
f6a9efaa | 4620 | rcu_thread_online(); |
cf3af59e | 4621 | cleanup(); |
f6a9efaa DG |
4622 | rcu_thread_offline(); |
4623 | rcu_unregister_thread(); | |
67e40797 | 4624 | if (!ret) { |
cf3af59e | 4625 | exit(EXIT_SUCCESS); |
67e40797 | 4626 | } |
cf3af59e | 4627 | error: |
5e16da05 | 4628 | exit(EXIT_FAILURE); |
fac6795d | 4629 | } |