Commit | Line | Data |
---|---|---|
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 | |
fac6795d DG |
20 | #include <getopt.h> |
21 | #include <grp.h> | |
22 | #include <limits.h> | |
23 | #include <pthread.h> | |
8c0faa1d | 24 | #include <semaphore.h> |
fac6795d DG |
25 | #include <signal.h> |
26 | #include <stdio.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
0fdd1e2c | 29 | #include <sys/mman.h> |
b73401da | 30 | #include <sys/mount.h> |
1e307fab | 31 | #include <sys/resource.h> |
fac6795d DG |
32 | #include <sys/socket.h> |
33 | #include <sys/stat.h> | |
34 | #include <sys/types.h> | |
0fdd1e2c DG |
35 | #include <sys/wait.h> |
36 | #include <urcu/futex.h> | |
fac6795d | 37 | #include <unistd.h> |
3bd1e081 | 38 | #include <config.h> |
fac6795d | 39 | |
990570ed | 40 | #include <common/common.h> |
0ba98ebc | 41 | #include <common/compat/poll.h> |
d27c42b8 | 42 | #include <common/compat/socket.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, | |
03550b58 MD |
103 | .err_sock = -1, |
104 | .cmd_sock = -1, | |
3bd1e081 | 105 | }; |
7753dea8 MD |
106 | static struct consumer_data ustconsumer64_data = { |
107 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
108 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
109 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
110 | .err_sock = -1, |
111 | .cmd_sock = -1, | |
7753dea8 MD |
112 | }; |
113 | static struct consumer_data ustconsumer32_data = { | |
114 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
115 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
116 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
117 | .err_sock = -1, |
118 | .cmd_sock = -1, | |
3bd1e081 MD |
119 | }; |
120 | ||
099e26bd | 121 | static int dispatch_thread_exit; |
fac6795d | 122 | |
54d01ffb DG |
123 | /* Global application Unix socket path */ |
124 | static char apps_unix_sock_path[PATH_MAX]; | |
125 | /* Global client Unix socket path */ | |
126 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
127 | /* global wait shm path for UST */ |
128 | static char wait_shm_path[PATH_MAX]; | |
fac6795d | 129 | |
1d4b027a | 130 | /* Sockets and FDs */ |
a4b35e07 MD |
131 | static int client_sock = -1; |
132 | static int apps_sock = -1; | |
133 | static int kernel_tracer_fd = -1; | |
76d7553f | 134 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 135 | |
273ea72c DG |
136 | /* |
137 | * Quit pipe for all threads. This permits a single cancellation point | |
138 | * for all threads when receiving an event on the pipe. | |
139 | */ | |
76d7553f | 140 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 141 | |
099e26bd DG |
142 | /* |
143 | * This pipe is used to inform the thread managing application communication | |
144 | * that a command is queued and ready to be processed. | |
145 | */ | |
76d7553f | 146 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 147 | |
1d4b027a | 148 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 149 | static pthread_t apps_thread; |
099e26bd | 150 | static pthread_t reg_apps_thread; |
1d4b027a | 151 | static pthread_t client_thread; |
7a485870 | 152 | static pthread_t kernel_thread; |
099e26bd | 153 | static pthread_t dispatch_thread; |
5eb91c98 | 154 | |
fac6795d | 155 | |
099e26bd DG |
156 | /* |
157 | * UST registration command queue. This queue is tied with a futex and uses a N | |
158 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
159 | * | |
160 | * The thread_manage_apps and thread_dispatch_ust_registration interact with | |
161 | * this queue and the wait/wake scheme. | |
162 | */ | |
163 | static struct ust_cmd_queue ust_cmd_queue; | |
164 | ||
b5541356 DG |
165 | /* |
166 | * Pointer initialized before thread creation. | |
167 | * | |
168 | * This points to the tracing session list containing the session count and a | |
169 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
170 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 171 | * |
d063d709 | 172 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 173 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
174 | */ |
175 | static struct ltt_session_list *session_list_ptr; | |
176 | ||
7753dea8 MD |
177 | int ust_consumerd64_fd = -1; |
178 | int ust_consumerd32_fd = -1; | |
179 | ||
fb6f1fa2 YB |
180 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
181 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
182 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
183 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
fb09408a MD |
184 | |
185 | static | |
7753dea8 | 186 | void setup_consumerd_path(void) |
fb09408a | 187 | { |
fc7a59ce | 188 | const char *bin, *libdir; |
fb09408a | 189 | |
7753dea8 MD |
190 | /* |
191 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
192 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
193 | * has not been defined. | |
7753dea8 | 194 | */ |
ebaeda94 | 195 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
196 | if (!consumerd32_bin[0]) { |
197 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
198 | } |
199 | if (!consumerd32_libdir[0]) { | |
200 | consumerd32_libdir = INSTALL_LIB_PATH; | |
201 | } | |
202 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
203 | if (!consumerd64_bin[0]) { |
204 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 205 | } |
ebaeda94 MD |
206 | if (!consumerd64_libdir[0]) { |
207 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
208 | } |
209 | #else | |
210 | #error "Unknown bitness" | |
211 | #endif | |
212 | ||
fb09408a MD |
213 | /* |
214 | * runtime env. var. overrides the build default. | |
215 | */ | |
fc7a59ce AM |
216 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
217 | if (bin) { | |
218 | consumerd32_bin = bin; | |
7753dea8 | 219 | } |
fc7a59ce AM |
220 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
221 | if (bin) { | |
222 | consumerd64_bin = bin; | |
ebaeda94 | 223 | } |
72f579ee | 224 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
225 | if (libdir) { |
226 | consumerd32_libdir = libdir; | |
227 | } | |
72f579ee | 228 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
229 | if (libdir) { |
230 | consumerd64_libdir = libdir; | |
fb09408a MD |
231 | } |
232 | } | |
233 | ||
5eb91c98 DG |
234 | /* |
235 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
236 | */ | |
237 | static int create_thread_poll_set(struct lttng_poll_event *events, | |
238 | unsigned int size) | |
239 | { | |
240 | int ret; | |
241 | ||
242 | if (events == NULL || size == 0) { | |
243 | ret = -1; | |
244 | goto error; | |
245 | } | |
246 | ||
247 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
248 | if (ret < 0) { | |
249 | goto error; | |
250 | } | |
251 | ||
252 | /* Add quit pipe */ | |
253 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN); | |
254 | if (ret < 0) { | |
255 | goto error; | |
256 | } | |
257 | ||
258 | return 0; | |
259 | ||
260 | error: | |
261 | return ret; | |
262 | } | |
263 | ||
264 | /* | |
265 | * Check if the thread quit pipe was triggered. | |
266 | * | |
267 | * Return 1 if it was triggered else 0; | |
268 | */ | |
269 | static int check_thread_quit_pipe(int fd, uint32_t events) | |
270 | { | |
271 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
272 | return 1; | |
273 | } | |
274 | ||
275 | return 0; | |
276 | } | |
277 | ||
0fdd1e2c DG |
278 | /* |
279 | * Return group ID of the tracing group or -1 if not found. | |
280 | */ | |
996b65c8 MD |
281 | static gid_t allowed_group(void) |
282 | { | |
283 | struct group *grp; | |
284 | ||
274e143b MD |
285 | if (opt_tracing_group) { |
286 | grp = getgrnam(opt_tracing_group); | |
287 | } else { | |
288 | grp = getgrnam(default_tracing_group); | |
289 | } | |
996b65c8 MD |
290 | if (!grp) { |
291 | return -1; | |
292 | } else { | |
293 | return grp->gr_gid; | |
294 | } | |
295 | } | |
296 | ||
273ea72c | 297 | /* |
5eb91c98 | 298 | * Init thread quit pipe. |
273ea72c DG |
299 | * |
300 | * Return -1 on error or 0 if all pipes are created. | |
301 | */ | |
302 | static int init_thread_quit_pipe(void) | |
303 | { | |
730389d9 | 304 | int ret, i; |
273ea72c | 305 | |
730389d9 | 306 | ret = pipe(thread_quit_pipe); |
273ea72c | 307 | if (ret < 0) { |
730389d9 | 308 | PERROR("thread quit pipe"); |
273ea72c DG |
309 | goto error; |
310 | } | |
311 | ||
730389d9 DG |
312 | for (i = 0; i < 2; i++) { |
313 | ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC); | |
314 | if (ret < 0) { | |
315 | PERROR("fcntl"); | |
316 | goto error; | |
317 | } | |
318 | } | |
319 | ||
273ea72c DG |
320 | error: |
321 | return ret; | |
322 | } | |
323 | ||
fac6795d | 324 | /* |
d063d709 DG |
325 | * Complete teardown of a kernel session. This free all data structure related |
326 | * to a kernel session and update counter. | |
fac6795d | 327 | */ |
1d4b027a | 328 | static void teardown_kernel_session(struct ltt_session *session) |
fac6795d | 329 | { |
8f7a84dd | 330 | if (!session->kernel_session) { |
99bab54f | 331 | DBG3("No kernel session when tearing down session"); |
84ea9c99 | 332 | return; |
8f7a84dd DG |
333 | } |
334 | ||
84ea9c99 | 335 | DBG("Tearing down kernel session"); |
d9800920 | 336 | |
84ea9c99 MD |
337 | /* |
338 | * If a custom kernel consumer was registered, close the socket before | |
339 | * tearing down the complete kernel session structure | |
340 | */ | |
03550b58 MD |
341 | if (kconsumer_data.cmd_sock >= 0 && |
342 | session->kernel_session->consumer_fd != kconsumer_data.cmd_sock) { | |
84ea9c99 | 343 | lttcomm_close_unix_sock(session->kernel_session->consumer_fd); |
fac6795d | 344 | } |
84ea9c99 MD |
345 | |
346 | trace_kernel_destroy_session(session->kernel_session); | |
fac6795d DG |
347 | } |
348 | ||
f6a9efaa DG |
349 | /* |
350 | * Complete teardown of all UST sessions. This will free everything on his path | |
351 | * and destroy the core essence of all ust sessions :) | |
352 | */ | |
353 | static void teardown_ust_session(struct ltt_session *session) | |
354 | { | |
84cd17c6 MD |
355 | int ret; |
356 | ||
8f7a84dd | 357 | if (!session->ust_session) { |
99bab54f | 358 | DBG3("No UST session when tearing down session"); |
f470a390 | 359 | return; |
8f7a84dd DG |
360 | } |
361 | ||
84ea9c99 | 362 | DBG("Tearing down UST session(s)"); |
8f7a84dd | 363 | |
84cd17c6 MD |
364 | ret = ust_app_destroy_trace_all(session->ust_session); |
365 | if (ret) { | |
366 | ERR("Error in ust_app_destroy_trace_all"); | |
367 | } | |
8f7a84dd | 368 | |
f6a9efaa DG |
369 | trace_ust_destroy_session(session->ust_session); |
370 | } | |
371 | ||
099e26bd DG |
372 | /* |
373 | * Stop all threads by closing the thread quit pipe. | |
374 | */ | |
cf3af59e MD |
375 | static void stop_threads(void) |
376 | { | |
5eb91c98 DG |
377 | int ret; |
378 | ||
cf3af59e MD |
379 | /* Stopping all threads */ |
380 | DBG("Terminating all threads"); | |
54d01ffb | 381 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
382 | if (ret < 0) { |
383 | ERR("write error on thread quit pipe"); | |
384 | } | |
385 | ||
099e26bd DG |
386 | /* Dispatch thread */ |
387 | dispatch_thread_exit = 1; | |
388 | futex_nto1_wake(&ust_cmd_queue.futex); | |
cf3af59e MD |
389 | } |
390 | ||
fac6795d | 391 | /* |
d063d709 | 392 | * Cleanup the daemon |
fac6795d | 393 | */ |
cf3af59e | 394 | static void cleanup(void) |
fac6795d | 395 | { |
76d7553f | 396 | int ret, i; |
1d4b027a | 397 | char *cmd; |
af9737e9 | 398 | struct ltt_session *sess, *stmp; |
fac6795d | 399 | |
1d4b027a | 400 | DBG("Cleaning up"); |
e07ae692 | 401 | |
67e40797 DG |
402 | DBG("Removing %s directory", rundir); |
403 | ret = asprintf(&cmd, "rm -rf %s", rundir); | |
404 | if (ret < 0) { | |
405 | ERR("asprintf failed. Something is really wrong!"); | |
406 | } | |
5461b305 | 407 | |
67e40797 DG |
408 | /* Remove lttng run directory */ |
409 | ret = system(cmd); | |
410 | if (ret < 0) { | |
411 | ERR("Unable to clean %s", rundir); | |
1d4b027a | 412 | } |
67e40797 | 413 | free(cmd); |
5461b305 | 414 | |
99bab54f | 415 | DBG("Cleaning up all sessions"); |
fac6795d | 416 | |
b5541356 | 417 | /* Destroy session list mutex */ |
273ea72c DG |
418 | if (session_list_ptr != NULL) { |
419 | pthread_mutex_destroy(&session_list_ptr->lock); | |
420 | ||
421 | /* Cleanup ALL session */ | |
54d01ffb DG |
422 | cds_list_for_each_entry_safe(sess, stmp, |
423 | &session_list_ptr->head, list) { | |
273ea72c | 424 | teardown_kernel_session(sess); |
f6a9efaa DG |
425 | teardown_ust_session(sess); |
426 | free(sess); | |
273ea72c DG |
427 | } |
428 | } | |
429 | ||
099e26bd | 430 | DBG("Closing all UST sockets"); |
56fff090 | 431 | ust_app_clean_list(); |
099e26bd | 432 | |
3bd1e081 | 433 | pthread_mutex_destroy(&kconsumer_data.pid_mutex); |
b5541356 | 434 | |
4fba7219 DG |
435 | if (is_root && !opt_no_kernel) { |
436 | DBG2("Closing kernel fd"); | |
a4b35e07 | 437 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
438 | ret = close(kernel_tracer_fd); |
439 | if (ret) { | |
440 | PERROR("close"); | |
441 | } | |
a4b35e07 | 442 | } |
2f50c8a3 | 443 | DBG("Unloading kernel modules"); |
096102bd | 444 | modprobe_remove_lttng_all(); |
2f50c8a3 | 445 | } |
5eb91c98 | 446 | |
76d7553f MD |
447 | /* |
448 | * Closing all pipes used for communication between threads. | |
449 | */ | |
450 | for (i = 0; i < 2; i++) { | |
451 | if (kernel_poll_pipe[i] >= 0) { | |
452 | ret = close(kernel_poll_pipe[i]); | |
453 | if (ret) { | |
454 | PERROR("close"); | |
455 | } | |
456 | ||
457 | } | |
458 | } | |
459 | for (i = 0; i < 2; i++) { | |
460 | if (thread_quit_pipe[i] >= 0) { | |
461 | ret = close(thread_quit_pipe[i]); | |
462 | if (ret) { | |
463 | PERROR("close"); | |
464 | } | |
465 | } | |
466 | } | |
467 | for (i = 0; i < 2; i++) { | |
468 | if (apps_cmd_pipe[i] >= 0) { | |
469 | ret = close(apps_cmd_pipe[i]); | |
470 | if (ret) { | |
471 | PERROR("close"); | |
472 | } | |
473 | } | |
474 | } | |
421cb601 DG |
475 | |
476 | /* <fun> */ | |
f56a39af | 477 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
478 | "Matthew, BEET driven development works!%c[%dm", |
479 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
480 | /* </fun> */ | |
fac6795d DG |
481 | } |
482 | ||
e065084a | 483 | /* |
d063d709 | 484 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 485 | * |
d063d709 | 486 | * Return lttcomm error code. |
e065084a DG |
487 | */ |
488 | static int send_unix_sock(int sock, void *buf, size_t len) | |
489 | { | |
490 | /* Check valid length */ | |
491 | if (len <= 0) { | |
492 | return -1; | |
493 | } | |
494 | ||
495 | return lttcomm_send_unix_sock(sock, buf, len); | |
496 | } | |
497 | ||
5461b305 | 498 | /* |
d063d709 | 499 | * Free memory of a command context structure. |
5461b305 | 500 | */ |
a2fb29a5 | 501 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 502 | { |
a2fb29a5 DG |
503 | DBG("Clean command context structure"); |
504 | if (*cmd_ctx) { | |
505 | if ((*cmd_ctx)->llm) { | |
506 | free((*cmd_ctx)->llm); | |
5461b305 | 507 | } |
a2fb29a5 DG |
508 | if ((*cmd_ctx)->lsm) { |
509 | free((*cmd_ctx)->lsm); | |
5461b305 | 510 | } |
a2fb29a5 DG |
511 | free(*cmd_ctx); |
512 | *cmd_ctx = NULL; | |
5461b305 DG |
513 | } |
514 | } | |
515 | ||
f3ed775e | 516 | /* |
d063d709 | 517 | * Send all stream fds of kernel channel to the consumer. |
f3ed775e | 518 | */ |
2bdd86d4 | 519 | static int send_kconsumer_channel_streams(struct consumer_data *consumer_data, |
6df2e2c9 MD |
520 | int sock, struct ltt_kernel_channel *channel, |
521 | uid_t uid, gid_t gid) | |
f3ed775e DG |
522 | { |
523 | int ret; | |
f3ed775e | 524 | struct ltt_kernel_stream *stream; |
3bd1e081 | 525 | struct lttcomm_consumer_msg lkm; |
f3ed775e | 526 | |
3bd1e081 | 527 | DBG("Sending streams of channel %s to kernel consumer", |
54d01ffb | 528 | channel->channel->name); |
f3ed775e | 529 | |
3bd1e081 MD |
530 | /* Send channel */ |
531 | lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL; | |
532 | lkm.u.channel.channel_key = channel->fd; | |
533 | lkm.u.channel.max_sb_size = channel->channel->attr.subbuf_size; | |
534 | lkm.u.channel.mmap_len = 0; /* for kernel */ | |
2bdd86d4 | 535 | DBG("Sending channel %d to consumer", lkm.u.channel.channel_key); |
3bd1e081 | 536 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); |
f3ed775e | 537 | if (ret < 0) { |
76d7553f | 538 | PERROR("send consumer channel"); |
f3ed775e DG |
539 | goto error; |
540 | } | |
541 | ||
3bd1e081 | 542 | /* Send streams */ |
7a485870 | 543 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { |
3bd1e081 MD |
544 | if (!stream->fd) { |
545 | continue; | |
546 | } | |
547 | lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM; | |
548 | lkm.u.stream.channel_key = channel->fd; | |
549 | lkm.u.stream.stream_key = stream->fd; | |
550 | lkm.u.stream.state = stream->state; | |
551 | lkm.u.stream.output = channel->channel->attr.output; | |
552 | lkm.u.stream.mmap_len = 0; /* for kernel */ | |
6df2e2c9 MD |
553 | lkm.u.stream.uid = uid; |
554 | lkm.u.stream.gid = gid; | |
3bd1e081 MD |
555 | strncpy(lkm.u.stream.path_name, stream->pathname, PATH_MAX - 1); |
556 | lkm.u.stream.path_name[PATH_MAX - 1] = '\0'; | |
557 | DBG("Sending stream %d to consumer", lkm.u.stream.stream_key); | |
558 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
559 | if (ret < 0) { | |
76d7553f | 560 | PERROR("send consumer stream"); |
3bd1e081 MD |
561 | goto error; |
562 | } | |
563 | ret = lttcomm_send_fds_unix_sock(sock, &stream->fd, 1); | |
564 | if (ret < 0) { | |
76d7553f | 565 | PERROR("send consumer stream ancillary data"); |
3bd1e081 | 566 | goto error; |
f3ed775e DG |
567 | } |
568 | } | |
569 | ||
3bd1e081 | 570 | DBG("consumer channel streams sent"); |
f3ed775e DG |
571 | |
572 | return 0; | |
573 | ||
574 | error: | |
575 | return ret; | |
576 | } | |
577 | ||
578 | /* | |
d063d709 | 579 | * Send all stream fds of the kernel session to the consumer. |
f3ed775e | 580 | */ |
2bdd86d4 | 581 | static int send_kconsumer_session_streams(struct consumer_data *consumer_data, |
3bd1e081 | 582 | struct ltt_kernel_session *session) |
f3ed775e DG |
583 | { |
584 | int ret; | |
585 | struct ltt_kernel_channel *chan; | |
3bd1e081 MD |
586 | struct lttcomm_consumer_msg lkm; |
587 | int sock = session->consumer_fd; | |
7a485870 DG |
588 | |
589 | DBG("Sending metadata stream fd"); | |
590 | ||
03550b58 MD |
591 | /* Extra protection. It's NOT supposed to be set to -1 at this point */ |
592 | if (session->consumer_fd < 0) { | |
3bd1e081 | 593 | session->consumer_fd = consumer_data->cmd_sock; |
d9800920 DG |
594 | } |
595 | ||
03550b58 | 596 | if (session->metadata_stream_fd >= 0) { |
3bd1e081 MD |
597 | /* Send metadata channel fd */ |
598 | lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL; | |
599 | lkm.u.channel.channel_key = session->metadata->fd; | |
600 | lkm.u.channel.max_sb_size = session->metadata->conf->attr.subbuf_size; | |
601 | lkm.u.channel.mmap_len = 0; /* for kernel */ | |
602 | DBG("Sending metadata channel %d to consumer", lkm.u.stream.stream_key); | |
603 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
604 | if (ret < 0) { | |
76d7553f | 605 | PERROR("send consumer channel"); |
3bd1e081 MD |
606 | goto error; |
607 | } | |
608 | ||
609 | /* Send metadata stream fd */ | |
610 | lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM; | |
611 | lkm.u.stream.channel_key = session->metadata->fd; | |
612 | lkm.u.stream.stream_key = session->metadata_stream_fd; | |
613 | lkm.u.stream.state = LTTNG_CONSUMER_ACTIVE_STREAM; | |
614 | lkm.u.stream.output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
615 | lkm.u.stream.mmap_len = 0; /* for kernel */ | |
6df2e2c9 MD |
616 | lkm.u.stream.uid = session->uid; |
617 | lkm.u.stream.gid = session->gid; | |
3bd1e081 MD |
618 | strncpy(lkm.u.stream.path_name, session->metadata->pathname, PATH_MAX - 1); |
619 | lkm.u.stream.path_name[PATH_MAX - 1] = '\0'; | |
620 | DBG("Sending metadata stream %d to consumer", lkm.u.stream.stream_key); | |
621 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
622 | if (ret < 0) { | |
76d7553f | 623 | PERROR("send consumer stream"); |
3bd1e081 MD |
624 | goto error; |
625 | } | |
626 | ret = lttcomm_send_fds_unix_sock(sock, &session->metadata_stream_fd, 1); | |
7a485870 | 627 | if (ret < 0) { |
76d7553f | 628 | PERROR("send consumer stream"); |
7a485870 DG |
629 | goto error; |
630 | } | |
631 | } | |
f3ed775e | 632 | |
f3ed775e | 633 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
6df2e2c9 MD |
634 | ret = send_kconsumer_channel_streams(consumer_data, sock, chan, |
635 | session->uid, session->gid); | |
2bdd86d4 MD |
636 | if (ret < 0) { |
637 | goto error; | |
638 | } | |
639 | } | |
640 | ||
641 | DBG("consumer fds (metadata and channel streams) sent"); | |
642 | ||
643 | return 0; | |
644 | ||
645 | error: | |
646 | return ret; | |
647 | } | |
648 | ||
fac6795d | 649 | /* |
0fdd1e2c | 650 | * Notify UST applications using the shm mmap futex. |
fac6795d | 651 | */ |
0fdd1e2c | 652 | static int notify_ust_apps(int active) |
fac6795d | 653 | { |
0fdd1e2c | 654 | char *wait_shm_mmap; |
fac6795d | 655 | |
0fdd1e2c | 656 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 657 | |
0fdd1e2c DG |
658 | /* See shm.c for this call implying mmap, shm and futex calls */ |
659 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
660 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
661 | goto error; |
662 | } | |
663 | ||
0fdd1e2c DG |
664 | /* Wake waiting process */ |
665 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
666 | ||
667 | /* Apps notified successfully */ | |
668 | return 0; | |
fac6795d DG |
669 | |
670 | error: | |
0fdd1e2c | 671 | return -1; |
fac6795d DG |
672 | } |
673 | ||
e065084a | 674 | /* |
d063d709 DG |
675 | * Setup the outgoing data buffer for the response (llm) by allocating the |
676 | * right amount of memory and copying the original information from the lsm | |
677 | * structure. | |
ca95a216 | 678 | * |
d063d709 | 679 | * Return total size of the buffer pointed by buf. |
ca95a216 | 680 | */ |
5461b305 | 681 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 682 | { |
f3ed775e | 683 | int ret, buf_size; |
ca95a216 | 684 | |
f3ed775e | 685 | buf_size = size; |
5461b305 | 686 | |
ba7f0ae5 | 687 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 688 | if (cmd_ctx->llm == NULL) { |
76d7553f | 689 | PERROR("zmalloc"); |
5461b305 | 690 | ret = -ENOMEM; |
ca95a216 DG |
691 | goto error; |
692 | } | |
693 | ||
5461b305 DG |
694 | /* Copy common data */ |
695 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 696 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 697 | |
5461b305 DG |
698 | cmd_ctx->llm->data_size = size; |
699 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
700 | ||
ca95a216 DG |
701 | return buf_size; |
702 | ||
703 | error: | |
704 | return ret; | |
705 | } | |
706 | ||
7a485870 | 707 | /* |
5eb91c98 | 708 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 709 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 710 | */ |
5eb91c98 | 711 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 712 | { |
5eb91c98 | 713 | int ret; |
7a485870 DG |
714 | struct ltt_session *session; |
715 | struct ltt_kernel_channel *channel; | |
716 | ||
5eb91c98 | 717 | DBG("Updating kernel poll set"); |
7a485870 | 718 | |
54d01ffb | 719 | session_lock_list(); |
b5541356 | 720 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 721 | session_lock(session); |
7a485870 | 722 | if (session->kernel_session == NULL) { |
54d01ffb | 723 | session_unlock(session); |
7a485870 DG |
724 | continue; |
725 | } | |
7a485870 | 726 | |
54d01ffb DG |
727 | cds_list_for_each_entry(channel, |
728 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
729 | /* Add channel fd to the kernel poll set */ |
730 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
731 | if (ret < 0) { | |
54d01ffb | 732 | session_unlock(session); |
5eb91c98 DG |
733 | goto error; |
734 | } | |
735 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 736 | } |
54d01ffb | 737 | session_unlock(session); |
7a485870 | 738 | } |
54d01ffb | 739 | session_unlock_list(); |
7a485870 | 740 | |
5eb91c98 | 741 | return 0; |
7a485870 DG |
742 | |
743 | error: | |
54d01ffb | 744 | session_unlock_list(); |
7a485870 DG |
745 | return -1; |
746 | } | |
747 | ||
748 | /* | |
54d01ffb | 749 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 750 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 751 | * |
d063d709 | 752 | * Useful for CPU hotplug feature. |
7a485870 | 753 | */ |
2bdd86d4 | 754 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
755 | { |
756 | int ret = 0; | |
757 | struct ltt_session *session; | |
758 | struct ltt_kernel_channel *channel; | |
759 | ||
760 | DBG("Updating kernel streams for channel fd %d", fd); | |
761 | ||
54d01ffb | 762 | session_lock_list(); |
b5541356 | 763 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 764 | session_lock(session); |
7a485870 | 765 | if (session->kernel_session == NULL) { |
54d01ffb | 766 | session_unlock(session); |
7a485870 DG |
767 | continue; |
768 | } | |
d9800920 | 769 | |
03550b58 MD |
770 | /* This is not suppose to be -1 but this is an extra security check */ |
771 | if (session->kernel_session->consumer_fd < 0) { | |
3bd1e081 | 772 | session->kernel_session->consumer_fd = consumer_data->cmd_sock; |
d9800920 DG |
773 | } |
774 | ||
5eb91c98 DG |
775 | cds_list_for_each_entry(channel, |
776 | &session->kernel_session->channel_list.head, list) { | |
7a485870 DG |
777 | if (channel->fd == fd) { |
778 | DBG("Channel found, updating kernel streams"); | |
779 | ret = kernel_open_channel_stream(channel); | |
780 | if (ret < 0) { | |
b3c750d2 | 781 | goto error; |
7a485870 | 782 | } |
d9800920 | 783 | |
7a485870 | 784 | /* |
5eb91c98 DG |
785 | * Have we already sent fds to the consumer? If yes, it means |
786 | * that tracing is started so it is safe to send our updated | |
787 | * stream fds. | |
7a485870 | 788 | */ |
3bd1e081 | 789 | if (session->kernel_session->consumer_fds_sent == 1) { |
2bdd86d4 | 790 | ret = send_kconsumer_channel_streams(consumer_data, |
6df2e2c9 MD |
791 | session->kernel_session->consumer_fd, channel, |
792 | session->uid, session->gid); | |
7a485870 | 793 | if (ret < 0) { |
b3c750d2 | 794 | goto error; |
7a485870 DG |
795 | } |
796 | } | |
b3c750d2 | 797 | goto error; |
7a485870 DG |
798 | } |
799 | } | |
54d01ffb | 800 | session_unlock(session); |
7a485870 | 801 | } |
54d01ffb | 802 | session_unlock_list(); |
b3c750d2 | 803 | return ret; |
7a485870 | 804 | |
b3c750d2 | 805 | error: |
54d01ffb DG |
806 | session_unlock(session); |
807 | session_unlock_list(); | |
7a485870 DG |
808 | return ret; |
809 | } | |
810 | ||
487cf67c DG |
811 | /* |
812 | * For each tracing session, update newly registered apps. | |
813 | */ | |
814 | static void update_ust_app(int app_sock) | |
815 | { | |
816 | struct ltt_session *sess, *stmp; | |
817 | ||
4ee14516 DG |
818 | session_lock_list(); |
819 | ||
487cf67c DG |
820 | /* For all tracing session(s) */ |
821 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 822 | session_lock(sess); |
421cb601 DG |
823 | if (sess->ust_session) { |
824 | ust_app_global_update(sess->ust_session, app_sock); | |
825 | } | |
4ee14516 | 826 | session_unlock(sess); |
487cf67c | 827 | } |
4ee14516 DG |
828 | |
829 | session_unlock_list(); | |
487cf67c DG |
830 | } |
831 | ||
7a485870 | 832 | /* |
d063d709 | 833 | * This thread manage event coming from the kernel. |
7a485870 | 834 | * |
d063d709 DG |
835 | * Features supported in this thread: |
836 | * -) CPU Hotplug | |
7a485870 DG |
837 | */ |
838 | static void *thread_manage_kernel(void *data) | |
839 | { | |
5eb91c98 DG |
840 | int ret, i, pollfd, update_poll_flag = 1; |
841 | uint32_t revents, nb_fd; | |
7a485870 | 842 | char tmp; |
5eb91c98 | 843 | struct lttng_poll_event events; |
7a485870 DG |
844 | |
845 | DBG("Thread manage kernel started"); | |
846 | ||
5eb91c98 DG |
847 | ret = create_thread_poll_set(&events, 2); |
848 | if (ret < 0) { | |
76d7553f | 849 | goto error_poll_create; |
5eb91c98 DG |
850 | } |
851 | ||
852 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
853 | if (ret < 0) { | |
854 | goto error; | |
855 | } | |
856 | ||
7a485870 DG |
857 | while (1) { |
858 | if (update_poll_flag == 1) { | |
5f822d0a DG |
859 | /* |
860 | * Reset number of fd in the poll set. Always 2 since there is the thread | |
861 | * quit pipe and the kernel pipe. | |
862 | */ | |
863 | events.nb_fd = 2; | |
864 | ||
5eb91c98 DG |
865 | ret = update_kernel_poll(&events); |
866 | if (ret < 0) { | |
7a485870 DG |
867 | goto error; |
868 | } | |
869 | update_poll_flag = 0; | |
870 | } | |
871 | ||
5eb91c98 DG |
872 | nb_fd = LTTNG_POLL_GETNB(&events); |
873 | ||
874 | DBG("Thread kernel polling on %d fds", nb_fd); | |
875 | ||
876 | /* Zeroed the poll events */ | |
877 | lttng_poll_reset(&events); | |
7a485870 DG |
878 | |
879 | /* Poll infinite value of time */ | |
88f2b785 | 880 | restart: |
5eb91c98 | 881 | ret = lttng_poll_wait(&events, -1); |
7a485870 | 882 | if (ret < 0) { |
88f2b785 MD |
883 | /* |
884 | * Restart interrupted system call. | |
885 | */ | |
886 | if (errno == EINTR) { | |
887 | goto restart; | |
888 | } | |
7a485870 DG |
889 | goto error; |
890 | } else if (ret == 0) { | |
891 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
892 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
893 | "This should not have happened! Continuing..."); | |
7a485870 DG |
894 | continue; |
895 | } | |
896 | ||
5eb91c98 DG |
897 | for (i = 0; i < nb_fd; i++) { |
898 | /* Fetch once the poll data */ | |
899 | revents = LTTNG_POLL_GETEV(&events, i); | |
900 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 901 | |
5eb91c98 DG |
902 | /* Thread quit pipe has been closed. Killing thread. */ |
903 | ret = check_thread_quit_pipe(pollfd, revents); | |
904 | if (ret) { | |
905 | goto error; | |
906 | } | |
7a485870 | 907 | |
5eb91c98 DG |
908 | /* Check for data on kernel pipe */ |
909 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
910 | ret = read(kernel_poll_pipe[0], &tmp, 1); | |
911 | update_poll_flag = 1; | |
912 | continue; | |
913 | } else { | |
914 | /* | |
915 | * New CPU detected by the kernel. Adding kernel stream to | |
916 | * kernel session and updating the kernel consumer | |
917 | */ | |
918 | if (revents & LPOLLIN) { | |
2bdd86d4 | 919 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
920 | if (ret < 0) { |
921 | continue; | |
922 | } | |
923 | break; | |
924 | /* | |
925 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
926 | * and unregister kernel stream at this point. | |
927 | */ | |
7a485870 | 928 | } |
7a485870 DG |
929 | } |
930 | } | |
931 | } | |
932 | ||
933 | error: | |
5eb91c98 | 934 | lttng_poll_clean(&events); |
76d7553f MD |
935 | error_poll_create: |
936 | DBG("Kernel thread dying"); | |
7a485870 DG |
937 | return NULL; |
938 | } | |
939 | ||
1d4b027a | 940 | /* |
3bd1e081 | 941 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 942 | */ |
3bd1e081 | 943 | static void *thread_manage_consumer(void *data) |
1d4b027a | 944 | { |
76d7553f | 945 | int sock = -1, i, ret, pollfd; |
5eb91c98 | 946 | uint32_t revents, nb_fd; |
1d4b027a | 947 | enum lttcomm_return_code code; |
5eb91c98 | 948 | struct lttng_poll_event events; |
3bd1e081 | 949 | struct consumer_data *consumer_data = data; |
1d4b027a | 950 | |
3bd1e081 | 951 | DBG("[thread] Manage consumer started"); |
1d4b027a | 952 | |
3bd1e081 | 953 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); |
1d4b027a | 954 | if (ret < 0) { |
76d7553f | 955 | goto error_listen; |
1d4b027a DG |
956 | } |
957 | ||
5eb91c98 DG |
958 | /* |
959 | * Pass 2 as size here for the thread quit pipe and kconsumerd_err_sock. | |
960 | * Nothing more will be added to this poll set. | |
961 | */ | |
962 | ret = create_thread_poll_set(&events, 2); | |
963 | if (ret < 0) { | |
76d7553f | 964 | goto error_poll; |
5eb91c98 | 965 | } |
273ea72c | 966 | |
3bd1e081 | 967 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
968 | if (ret < 0) { |
969 | goto error; | |
970 | } | |
971 | ||
972 | nb_fd = LTTNG_POLL_GETNB(&events); | |
273ea72c DG |
973 | |
974 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 975 | restart: |
5eb91c98 | 976 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 977 | if (ret < 0) { |
88f2b785 MD |
978 | /* |
979 | * Restart interrupted system call. | |
980 | */ | |
981 | if (errno == EINTR) { | |
982 | goto restart; | |
983 | } | |
273ea72c DG |
984 | goto error; |
985 | } | |
986 | ||
5eb91c98 DG |
987 | for (i = 0; i < nb_fd; i++) { |
988 | /* Fetch once the poll data */ | |
989 | revents = LTTNG_POLL_GETEV(&events, i); | |
990 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
991 | ||
992 | /* Thread quit pipe has been closed. Killing thread. */ | |
993 | ret = check_thread_quit_pipe(pollfd, revents); | |
994 | if (ret) { | |
995 | goto error; | |
996 | } | |
997 | ||
998 | /* Event on the registration socket */ | |
3bd1e081 | 999 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 1000 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 1001 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
1002 | goto error; |
1003 | } | |
1004 | } | |
273ea72c DG |
1005 | } |
1006 | ||
3bd1e081 | 1007 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1008 | if (sock < 0) { |
1009 | goto error; | |
1010 | } | |
1011 | ||
3bd1e081 | 1012 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1013 | |
712ea556 | 1014 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1015 | ret = lttcomm_recv_unix_sock(sock, &code, |
1016 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1017 | if (ret <= 0) { |
1018 | goto error; | |
1019 | } | |
1020 | ||
3bd1e081 MD |
1021 | if (code == CONSUMERD_COMMAND_SOCK_READY) { |
1022 | consumer_data->cmd_sock = | |
1023 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
1024 | if (consumer_data->cmd_sock < 0) { | |
1025 | sem_post(&consumer_data->sem); | |
48842b30 | 1026 | PERROR("consumer connect"); |
1d4b027a DG |
1027 | goto error; |
1028 | } | |
1029 | /* Signal condition to tell that the kconsumerd is ready */ | |
3bd1e081 MD |
1030 | sem_post(&consumer_data->sem); |
1031 | DBG("consumer command socket ready"); | |
1d4b027a | 1032 | } else { |
3bd1e081 | 1033 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1034 | lttcomm_get_readable_code(-code)); |
1035 | goto error; | |
1036 | } | |
1037 | ||
54d01ffb | 1038 | /* Remove the kconsumerd error sock since we've established a connexion */ |
3bd1e081 | 1039 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1040 | if (ret < 0) { |
72079cae DG |
1041 | goto error; |
1042 | } | |
1043 | ||
5eb91c98 DG |
1044 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1045 | if (ret < 0) { | |
72079cae | 1046 | goto error; |
5eb91c98 DG |
1047 | } |
1048 | ||
1049 | /* Update number of fd */ | |
1050 | nb_fd = LTTNG_POLL_GETNB(&events); | |
1051 | ||
1052 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1053 | restart_poll: |
5eb91c98 DG |
1054 | ret = lttng_poll_wait(&events, -1); |
1055 | if (ret < 0) { | |
88f2b785 MD |
1056 | /* |
1057 | * Restart interrupted system call. | |
1058 | */ | |
1059 | if (errno == EINTR) { | |
1060 | goto restart_poll; | |
1061 | } | |
72079cae DG |
1062 | goto error; |
1063 | } | |
1064 | ||
5eb91c98 DG |
1065 | for (i = 0; i < nb_fd; i++) { |
1066 | /* Fetch once the poll data */ | |
1067 | revents = LTTNG_POLL_GETEV(&events, i); | |
1068 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1069 | ||
1070 | /* Thread quit pipe has been closed. Killing thread. */ | |
1071 | ret = check_thread_quit_pipe(pollfd, revents); | |
1072 | if (ret) { | |
1073 | goto error; | |
1074 | } | |
1075 | ||
1076 | /* Event on the kconsumerd socket */ | |
1077 | if (pollfd == sock) { | |
1078 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1079 | ERR("consumer err socket second poll error"); |
5eb91c98 DG |
1080 | goto error; |
1081 | } | |
1082 | } | |
1083 | } | |
1084 | ||
712ea556 | 1085 | /* Wait for any kconsumerd error */ |
54d01ffb DG |
1086 | ret = lttcomm_recv_unix_sock(sock, &code, |
1087 | sizeof(enum lttcomm_return_code)); | |
712ea556 | 1088 | if (ret <= 0) { |
3bd1e081 | 1089 | ERR("consumer closed the command socket"); |
712ea556 | 1090 | goto error; |
6f61d021 | 1091 | } |
1d4b027a | 1092 | |
3bd1e081 | 1093 | ERR("consumer return code : %s", lttcomm_get_readable_code(-code)); |
712ea556 | 1094 | |
1d4b027a | 1095 | error: |
76d7553f MD |
1096 | if (consumer_data->err_sock >= 0) { |
1097 | ret = close(consumer_data->err_sock); | |
1098 | if (ret) { | |
1099 | PERROR("close"); | |
1100 | } | |
1101 | } | |
1102 | if (consumer_data->cmd_sock >= 0) { | |
1103 | ret = close(consumer_data->cmd_sock); | |
1104 | if (ret) { | |
1105 | PERROR("close"); | |
1106 | } | |
1107 | } | |
1108 | if (sock >= 0) { | |
1109 | ret = close(sock); | |
1110 | if (ret) { | |
1111 | PERROR("close"); | |
1112 | } | |
1113 | } | |
273ea72c | 1114 | |
3bd1e081 MD |
1115 | unlink(consumer_data->err_unix_sock_path); |
1116 | unlink(consumer_data->cmd_unix_sock_path); | |
1117 | consumer_data->pid = 0; | |
1d4b027a | 1118 | |
5eb91c98 | 1119 | lttng_poll_clean(&events); |
76d7553f MD |
1120 | error_poll: |
1121 | error_listen: | |
1122 | DBG("consumer thread cleanup completed"); | |
0177d773 | 1123 | |
5eb91c98 | 1124 | return NULL; |
099e26bd DG |
1125 | } |
1126 | ||
099e26bd DG |
1127 | /* |
1128 | * This thread manage application communication. | |
1d4b027a DG |
1129 | */ |
1130 | static void *thread_manage_apps(void *data) | |
099e26bd | 1131 | { |
5eb91c98 DG |
1132 | int i, ret, pollfd; |
1133 | uint32_t revents, nb_fd; | |
099e26bd | 1134 | struct ust_command ust_cmd; |
5eb91c98 | 1135 | struct lttng_poll_event events; |
099e26bd DG |
1136 | |
1137 | DBG("[thread] Manage application started"); | |
1138 | ||
f6a9efaa DG |
1139 | rcu_register_thread(); |
1140 | rcu_thread_online(); | |
1141 | ||
5eb91c98 DG |
1142 | ret = create_thread_poll_set(&events, 2); |
1143 | if (ret < 0) { | |
76d7553f | 1144 | goto error_poll_create; |
5eb91c98 | 1145 | } |
099e26bd | 1146 | |
5eb91c98 DG |
1147 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1148 | if (ret < 0) { | |
1149 | goto error; | |
1150 | } | |
099e26bd | 1151 | |
5eb91c98 DG |
1152 | while (1) { |
1153 | /* Zeroed the events structure */ | |
1154 | lttng_poll_reset(&events); | |
0177d773 | 1155 | |
5eb91c98 | 1156 | nb_fd = LTTNG_POLL_GETNB(&events); |
099e26bd DG |
1157 | |
1158 | DBG("Apps thread polling on %d fds", nb_fd); | |
1159 | ||
1160 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1161 | restart: |
5eb91c98 | 1162 | ret = lttng_poll_wait(&events, -1); |
099e26bd | 1163 | if (ret < 0) { |
88f2b785 MD |
1164 | /* |
1165 | * Restart interrupted system call. | |
1166 | */ | |
1167 | if (errno == EINTR) { | |
1168 | goto restart; | |
1169 | } | |
099e26bd DG |
1170 | goto error; |
1171 | } | |
1172 | ||
5eb91c98 DG |
1173 | for (i = 0; i < nb_fd; i++) { |
1174 | /* Fetch once the poll data */ | |
1175 | revents = LTTNG_POLL_GETEV(&events, i); | |
1176 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1177 | ||
1178 | /* Thread quit pipe has been closed. Killing thread. */ | |
1179 | ret = check_thread_quit_pipe(pollfd, revents); | |
1180 | if (ret) { | |
099e26bd | 1181 | goto error; |
5eb91c98 | 1182 | } |
099e26bd | 1183 | |
5eb91c98 DG |
1184 | /* Inspect the apps cmd pipe */ |
1185 | if (pollfd == apps_cmd_pipe[0]) { | |
1186 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1187 | ERR("Apps command pipe error"); | |
0177d773 | 1188 | goto error; |
5eb91c98 DG |
1189 | } else if (revents & LPOLLIN) { |
1190 | /* Empty pipe */ | |
1191 | ret = read(apps_cmd_pipe[0], &ust_cmd, sizeof(ust_cmd)); | |
1192 | if (ret < 0 || ret < sizeof(ust_cmd)) { | |
76d7553f | 1193 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1194 | goto error; |
1195 | } | |
099e26bd | 1196 | |
5eb91c98 | 1197 | /* Register applicaton to the session daemon */ |
56fff090 | 1198 | ret = ust_app_register(&ust_cmd.reg_msg, |
54d01ffb | 1199 | ust_cmd.sock); |
88ff5b7f | 1200 | if (ret == -ENOMEM) { |
5eb91c98 | 1201 | goto error; |
88ff5b7f MD |
1202 | } else if (ret < 0) { |
1203 | break; | |
5eb91c98 DG |
1204 | } |
1205 | ||
acc7b41b | 1206 | /* |
e0c7ec2b | 1207 | * Validate UST version compatibility. |
acc7b41b | 1208 | */ |
e0c7ec2b DG |
1209 | ret = ust_app_validate_version(ust_cmd.sock); |
1210 | if (ret >= 0) { | |
1211 | /* | |
1212 | * Add channel(s) and event(s) to newly registered apps | |
1213 | * from lttng global UST domain. | |
1214 | */ | |
1215 | update_ust_app(ust_cmd.sock); | |
1216 | } | |
acc7b41b | 1217 | |
f2ca2e25 | 1218 | ret = ust_app_register_done(ust_cmd.sock); |
5eb91c98 DG |
1219 | if (ret < 0) { |
1220 | /* | |
1221 | * If the registration is not possible, we simply | |
1222 | * unregister the apps and continue | |
1223 | */ | |
56fff090 | 1224 | ust_app_unregister(ust_cmd.sock); |
5eb91c98 DG |
1225 | } else { |
1226 | /* | |
1227 | * We just need here to monitor the close of the UST | |
1228 | * socket and poll set monitor those by default. | |
a9ade966 MD |
1229 | * Listen on POLLIN (even if we never expect any |
1230 | * data) to ensure that hangup wakes us. | |
5eb91c98 | 1231 | */ |
a9ade966 | 1232 | ret = lttng_poll_add(&events, ust_cmd.sock, LPOLLIN); |
5eb91c98 DG |
1233 | if (ret < 0) { |
1234 | goto error; | |
1235 | } | |
1236 | ||
54d01ffb DG |
1237 | DBG("Apps with sock %d added to poll set", |
1238 | ust_cmd.sock); | |
5eb91c98 | 1239 | } |
487cf67c | 1240 | |
5eb91c98 | 1241 | break; |
0177d773 | 1242 | } |
5eb91c98 DG |
1243 | } else { |
1244 | /* | |
54d01ffb DG |
1245 | * At this point, we know that a registered application made |
1246 | * the event at poll_wait. | |
5eb91c98 DG |
1247 | */ |
1248 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1249 | /* Removing from the poll set */ | |
1250 | ret = lttng_poll_del(&events, pollfd); | |
1251 | if (ret < 0) { | |
1252 | goto error; | |
1253 | } | |
099e26bd | 1254 | |
b9d9b220 | 1255 | /* Socket closed on remote end. */ |
56fff090 | 1256 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1257 | break; |
1258 | } | |
099e26bd DG |
1259 | } |
1260 | } | |
099e26bd DG |
1261 | } |
1262 | ||
1263 | error: | |
5eb91c98 | 1264 | lttng_poll_clean(&events); |
76d7553f MD |
1265 | error_poll_create: |
1266 | DBG("Application communication apps thread cleanup complete"); | |
f6a9efaa DG |
1267 | rcu_thread_offline(); |
1268 | rcu_unregister_thread(); | |
099e26bd DG |
1269 | return NULL; |
1270 | } | |
1271 | ||
1272 | /* | |
1273 | * Dispatch request from the registration threads to the application | |
1274 | * communication thread. | |
1275 | */ | |
1276 | static void *thread_dispatch_ust_registration(void *data) | |
1277 | { | |
1278 | int ret; | |
1279 | struct cds_wfq_node *node; | |
1280 | struct ust_command *ust_cmd = NULL; | |
1281 | ||
1282 | DBG("[thread] Dispatch UST command started"); | |
1283 | ||
1284 | while (!dispatch_thread_exit) { | |
1285 | /* Atomically prepare the queue futex */ | |
1286 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1287 | ||
1288 | do { | |
1289 | /* Dequeue command for registration */ | |
1290 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1291 | if (node == NULL) { | |
00a17c97 | 1292 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1293 | /* Continue thread execution */ |
1294 | break; | |
1295 | } | |
1296 | ||
1297 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1298 | ||
2f50c8a3 DG |
1299 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1300 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1301 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1302 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1303 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1304 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
099e26bd DG |
1305 | /* |
1306 | * Inform apps thread of the new application registration. This | |
1307 | * call is blocking so we can be assured that the data will be read | |
1308 | * at some point in time or wait to the end of the world :) | |
1309 | */ | |
1310 | ret = write(apps_cmd_pipe[1], ust_cmd, | |
1311 | sizeof(struct ust_command)); | |
1312 | if (ret < 0) { | |
76d7553f | 1313 | PERROR("write apps cmd pipe"); |
099e26bd DG |
1314 | if (errno == EBADF) { |
1315 | /* | |
1316 | * We can't inform the application thread to process | |
1317 | * registration. We will exit or else application | |
1318 | * registration will not occur and tracing will never | |
1319 | * start. | |
1320 | */ | |
1321 | goto error; | |
1322 | } | |
1323 | } | |
1324 | free(ust_cmd); | |
1325 | } while (node != NULL); | |
1326 | ||
1327 | /* Futex wait on queue. Blocking call on futex() */ | |
1328 | futex_nto1_wait(&ust_cmd_queue.futex); | |
1329 | } | |
1330 | ||
1331 | error: | |
1332 | DBG("Dispatch thread dying"); | |
1333 | return NULL; | |
1334 | } | |
1335 | ||
1336 | /* | |
1337 | * This thread manage application registration. | |
1338 | */ | |
1339 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1340 | { |
a4b35e07 | 1341 | int sock = -1, i, ret, pollfd; |
5eb91c98 DG |
1342 | uint32_t revents, nb_fd; |
1343 | struct lttng_poll_event events; | |
099e26bd DG |
1344 | /* |
1345 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1346 | * freed in the manage apps thread. | |
1347 | */ | |
1348 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1349 | |
099e26bd | 1350 | DBG("[thread] Manage application registration started"); |
1d4b027a DG |
1351 | |
1352 | ret = lttcomm_listen_unix_sock(apps_sock); | |
1353 | if (ret < 0) { | |
76d7553f | 1354 | goto error_listen; |
1d4b027a DG |
1355 | } |
1356 | ||
5eb91c98 DG |
1357 | /* |
1358 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1359 | * more will be added to this poll set. | |
1360 | */ | |
1361 | ret = create_thread_poll_set(&events, 2); | |
1362 | if (ret < 0) { | |
76d7553f | 1363 | goto error_create_poll; |
5eb91c98 | 1364 | } |
273ea72c | 1365 | |
5eb91c98 DG |
1366 | /* Add the application registration socket */ |
1367 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1368 | if (ret < 0) { | |
76d7553f | 1369 | goto error_poll_add; |
5eb91c98 | 1370 | } |
273ea72c | 1371 | |
1d4b027a | 1372 | /* Notify all applications to register */ |
0fdd1e2c DG |
1373 | ret = notify_ust_apps(1); |
1374 | if (ret < 0) { | |
1375 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1376 | "Execution continues but there might be problem for already\n" |
1377 | "running applications that wishes to register."); | |
0fdd1e2c | 1378 | } |
1d4b027a DG |
1379 | |
1380 | while (1) { | |
1381 | DBG("Accepting application registration"); | |
273ea72c | 1382 | |
5eb91c98 DG |
1383 | nb_fd = LTTNG_POLL_GETNB(&events); |
1384 | ||
273ea72c | 1385 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 1386 | restart: |
5eb91c98 | 1387 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 1388 | if (ret < 0) { |
88f2b785 MD |
1389 | /* |
1390 | * Restart interrupted system call. | |
1391 | */ | |
1392 | if (errno == EINTR) { | |
1393 | goto restart; | |
1394 | } | |
273ea72c DG |
1395 | goto error; |
1396 | } | |
1397 | ||
5eb91c98 DG |
1398 | for (i = 0; i < nb_fd; i++) { |
1399 | /* Fetch once the poll data */ | |
1400 | revents = LTTNG_POLL_GETEV(&events, i); | |
1401 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1402 | |
5eb91c98 DG |
1403 | /* Thread quit pipe has been closed. Killing thread. */ |
1404 | ret = check_thread_quit_pipe(pollfd, revents); | |
1405 | if (ret) { | |
90014c57 DG |
1406 | goto error; |
1407 | } | |
1d4b027a | 1408 | |
5eb91c98 DG |
1409 | /* Event on the registration socket */ |
1410 | if (pollfd == apps_sock) { | |
1411 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1412 | ERR("Register apps socket poll error"); | |
1413 | goto error; | |
1414 | } else if (revents & LPOLLIN) { | |
1415 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1416 | if (sock < 0) { | |
1417 | goto error; | |
1418 | } | |
099e26bd | 1419 | |
5eb91c98 | 1420 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1421 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1422 | if (ust_cmd == NULL) { |
76d7553f | 1423 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
1424 | goto error; |
1425 | } | |
1d4b027a | 1426 | |
5eb91c98 DG |
1427 | /* |
1428 | * Using message-based transmissions to ensure we don't | |
1429 | * have to deal with partially received messages. | |
1430 | */ | |
1431 | ret = lttcomm_recv_unix_sock(sock, &ust_cmd->reg_msg, | |
1432 | sizeof(struct ust_register_msg)); | |
1433 | if (ret < 0 || ret < sizeof(struct ust_register_msg)) { | |
1434 | if (ret < 0) { | |
76d7553f | 1435 | PERROR("lttcomm_recv_unix_sock register apps"); |
5eb91c98 DG |
1436 | } else { |
1437 | ERR("Wrong size received on apps register"); | |
1438 | } | |
1439 | free(ust_cmd); | |
76d7553f MD |
1440 | ret = close(sock); |
1441 | if (ret) { | |
1442 | PERROR("close"); | |
1443 | } | |
1444 | sock = -1; | |
5eb91c98 DG |
1445 | continue; |
1446 | } | |
099e26bd | 1447 | |
5eb91c98 | 1448 | ust_cmd->sock = sock; |
34a2494f | 1449 | sock = -1; |
099e26bd | 1450 | |
5eb91c98 DG |
1451 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1452 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1453 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1454 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1455 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1456 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1457 | |
5eb91c98 DG |
1458 | /* |
1459 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1460 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1461 | */ |
1462 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1463 | ||
1464 | /* | |
1465 | * Wake the registration queue futex. Implicit memory | |
1466 | * barrier with the exchange in cds_wfq_enqueue. | |
1467 | */ | |
1468 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1469 | } | |
1470 | } | |
90014c57 | 1471 | } |
1d4b027a DG |
1472 | } |
1473 | ||
1474 | error: | |
0fdd1e2c DG |
1475 | /* Notify that the registration thread is gone */ |
1476 | notify_ust_apps(0); | |
1477 | ||
a4b35e07 | 1478 | if (apps_sock >= 0) { |
76d7553f MD |
1479 | ret = close(apps_sock); |
1480 | if (ret) { | |
1481 | PERROR("close"); | |
1482 | } | |
a4b35e07 | 1483 | } |
46c3f085 | 1484 | if (sock >= 0) { |
76d7553f MD |
1485 | ret = close(sock); |
1486 | if (ret) { | |
1487 | PERROR("close"); | |
1488 | } | |
a4b35e07 | 1489 | } |
273ea72c | 1490 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1491 | |
76d7553f | 1492 | error_poll_add: |
5eb91c98 | 1493 | lttng_poll_clean(&events); |
76d7553f MD |
1494 | error_listen: |
1495 | error_create_poll: | |
1496 | DBG("UST Registration thread cleanup complete"); | |
5eb91c98 | 1497 | |
1d4b027a DG |
1498 | return NULL; |
1499 | } | |
1500 | ||
8c0faa1d | 1501 | /* |
3bd1e081 | 1502 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1503 | * exec or it will fails. |
8c0faa1d | 1504 | */ |
3bd1e081 | 1505 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d DG |
1506 | { |
1507 | int ret; | |
ee0b0061 DG |
1508 | struct timespec timeout; |
1509 | ||
1510 | timeout.tv_sec = DEFAULT_SEM_WAIT_TIMEOUT; | |
1511 | timeout.tv_nsec = 0; | |
8c0faa1d DG |
1512 | |
1513 | /* Setup semaphore */ | |
3bd1e081 | 1514 | ret = sem_init(&consumer_data->sem, 0, 0); |
ee0b0061 | 1515 | if (ret < 0) { |
3bd1e081 | 1516 | PERROR("sem_init consumer semaphore"); |
ee0b0061 DG |
1517 | goto error; |
1518 | } | |
8c0faa1d | 1519 | |
3bd1e081 MD |
1520 | ret = pthread_create(&consumer_data->thread, NULL, |
1521 | thread_manage_consumer, consumer_data); | |
8c0faa1d | 1522 | if (ret != 0) { |
3bd1e081 | 1523 | PERROR("pthread_create consumer"); |
ee0b0061 | 1524 | ret = -1; |
8c0faa1d DG |
1525 | goto error; |
1526 | } | |
1527 | ||
ee0b0061 DG |
1528 | /* Get time for sem_timedwait absolute timeout */ |
1529 | ret = clock_gettime(CLOCK_REALTIME, &timeout); | |
1530 | if (ret < 0) { | |
3bd1e081 | 1531 | PERROR("clock_gettime spawn consumer"); |
ee0b0061 | 1532 | /* Infinite wait for the kconsumerd thread to be ready */ |
3bd1e081 | 1533 | ret = sem_wait(&consumer_data->sem); |
ee0b0061 DG |
1534 | } else { |
1535 | /* Normal timeout if the gettime was successful */ | |
1536 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
3bd1e081 | 1537 | ret = sem_timedwait(&consumer_data->sem, &timeout); |
ee0b0061 | 1538 | } |
8c0faa1d | 1539 | |
ee0b0061 DG |
1540 | if (ret < 0) { |
1541 | if (errno == ETIMEDOUT) { | |
1542 | /* | |
1543 | * Call has timed out so we kill the kconsumerd_thread and return | |
1544 | * an error. | |
1545 | */ | |
3bd1e081 MD |
1546 | ERR("The consumer thread was never ready. Killing it"); |
1547 | ret = pthread_cancel(consumer_data->thread); | |
ee0b0061 | 1548 | if (ret < 0) { |
3bd1e081 | 1549 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
1550 | } |
1551 | } else { | |
3bd1e081 | 1552 | PERROR("semaphore wait failed consumer thread"); |
ee0b0061 DG |
1553 | } |
1554 | goto error; | |
1555 | } | |
1556 | ||
3bd1e081 MD |
1557 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1558 | if (consumer_data->pid == 0) { | |
712ea556 | 1559 | ERR("Kconsumerd did not start"); |
3bd1e081 | 1560 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
1561 | goto error; |
1562 | } | |
3bd1e081 | 1563 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 1564 | |
8c0faa1d DG |
1565 | return 0; |
1566 | ||
1567 | error: | |
1568 | return ret; | |
1569 | } | |
1570 | ||
d9800920 | 1571 | /* |
3bd1e081 | 1572 | * Join consumer thread |
d9800920 | 1573 | */ |
3bd1e081 | 1574 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
1575 | { |
1576 | void *status; | |
1577 | int ret; | |
1578 | ||
3bd1e081 MD |
1579 | if (consumer_data->pid != 0) { |
1580 | ret = kill(consumer_data->pid, SIGTERM); | |
cf3af59e | 1581 | if (ret) { |
3bd1e081 | 1582 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
1583 | return ret; |
1584 | } | |
3bd1e081 | 1585 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
1586 | } else { |
1587 | return 0; | |
1588 | } | |
1589 | } | |
1590 | ||
8c0faa1d | 1591 | /* |
3bd1e081 | 1592 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 1593 | * |
d063d709 | 1594 | * Return pid if successful else -1. |
8c0faa1d | 1595 | */ |
3bd1e081 | 1596 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
1597 | { |
1598 | int ret; | |
1599 | pid_t pid; | |
94c55f17 | 1600 | const char *consumer_to_use; |
53086306 | 1601 | const char *verbosity; |
94c55f17 | 1602 | struct stat st; |
8c0faa1d | 1603 | |
3bd1e081 | 1604 | DBG("Spawning consumerd"); |
c49dc785 | 1605 | |
8c0faa1d DG |
1606 | pid = fork(); |
1607 | if (pid == 0) { | |
1608 | /* | |
3bd1e081 | 1609 | * Exec consumerd. |
8c0faa1d | 1610 | */ |
daee5345 | 1611 | if (opt_verbose_consumer) { |
53086306 DG |
1612 | verbosity = "--verbose"; |
1613 | } else { | |
1614 | verbosity = "--quiet"; | |
1615 | } | |
3bd1e081 MD |
1616 | switch (consumer_data->type) { |
1617 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 1618 | /* |
c7704d57 DG |
1619 | * Find out which consumerd to execute. We will first try the |
1620 | * 64-bit path, then the sessiond's installation directory, and | |
1621 | * fallback on the 32-bit one, | |
94c55f17 | 1622 | */ |
63a799e8 AM |
1623 | DBG3("Looking for a kernel consumer at these locations:"); |
1624 | DBG3(" 1) %s", consumerd64_bin); | |
1625 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
1626 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 1627 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 1628 | DBG3("Found location #1"); |
94c55f17 | 1629 | consumer_to_use = consumerd64_bin; |
94c55f17 | 1630 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 1631 | DBG3("Found location #2"); |
94c55f17 | 1632 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 1633 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 1634 | DBG3("Found location #3"); |
eb1e0bd4 | 1635 | consumer_to_use = consumerd32_bin; |
94c55f17 | 1636 | } else { |
63a799e8 | 1637 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
1638 | break; |
1639 | } | |
1640 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
1641 | execl(consumer_to_use, | |
1642 | "lttng-consumerd", verbosity, "-k", | |
1643 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
1644 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1645 | NULL); | |
3bd1e081 | 1646 | break; |
7753dea8 MD |
1647 | case LTTNG_CONSUMER64_UST: |
1648 | { | |
b1e0b6b6 | 1649 | char *tmpnew = NULL; |
8f4905da MD |
1650 | |
1651 | if (consumerd64_libdir[0] != '\0') { | |
1652 | char *tmp; | |
1653 | size_t tmplen; | |
1654 | ||
1655 | tmp = getenv("LD_LIBRARY_PATH"); | |
1656 | if (!tmp) { | |
1657 | tmp = ""; | |
1658 | } | |
1659 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1660 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
1661 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1662 | if (!tmpnew) { | |
1663 | ret = -ENOMEM; | |
1664 | goto error; | |
1665 | } | |
1666 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1667 | strcat(tmpnew, consumerd64_libdir); | |
1668 | if (tmp[0] != '\0') { | |
1669 | strcat(tmpnew, ":"); | |
1670 | strcat(tmpnew, tmp); | |
1671 | } | |
1672 | ret = putenv(tmpnew); | |
1673 | if (ret) { | |
1674 | ret = -errno; | |
1675 | goto error; | |
1676 | } | |
1677 | } | |
94c55f17 | 1678 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 1679 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1680 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1681 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1682 | NULL); | |
8f4905da MD |
1683 | if (consumerd64_libdir[0] != '\0') { |
1684 | free(tmpnew); | |
1685 | } | |
1686 | if (ret) { | |
1687 | goto error; | |
1688 | } | |
3bd1e081 | 1689 | break; |
7753dea8 MD |
1690 | } |
1691 | case LTTNG_CONSUMER32_UST: | |
1692 | { | |
937dde8e | 1693 | char *tmpnew = NULL; |
8f4905da MD |
1694 | |
1695 | if (consumerd32_libdir[0] != '\0') { | |
1696 | char *tmp; | |
1697 | size_t tmplen; | |
1698 | ||
1699 | tmp = getenv("LD_LIBRARY_PATH"); | |
1700 | if (!tmp) { | |
1701 | tmp = ""; | |
1702 | } | |
1703 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1704 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
1705 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1706 | if (!tmpnew) { | |
1707 | ret = -ENOMEM; | |
1708 | goto error; | |
1709 | } | |
1710 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1711 | strcat(tmpnew, consumerd32_libdir); | |
1712 | if (tmp[0] != '\0') { | |
1713 | strcat(tmpnew, ":"); | |
1714 | strcat(tmpnew, tmp); | |
1715 | } | |
1716 | ret = putenv(tmpnew); | |
1717 | if (ret) { | |
1718 | ret = -errno; | |
1719 | goto error; | |
1720 | } | |
1721 | } | |
94c55f17 | 1722 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 1723 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1724 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1725 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1726 | NULL); | |
8f4905da MD |
1727 | if (consumerd32_libdir[0] != '\0') { |
1728 | free(tmpnew); | |
1729 | } | |
1730 | if (ret) { | |
1731 | goto error; | |
1732 | } | |
7753dea8 MD |
1733 | break; |
1734 | } | |
3bd1e081 | 1735 | default: |
76d7553f | 1736 | PERROR("unknown consumer type"); |
3bd1e081 MD |
1737 | exit(EXIT_FAILURE); |
1738 | } | |
8c0faa1d | 1739 | if (errno != 0) { |
76d7553f | 1740 | PERROR("kernel start consumer exec"); |
8c0faa1d DG |
1741 | } |
1742 | exit(EXIT_FAILURE); | |
1743 | } else if (pid > 0) { | |
1744 | ret = pid; | |
8c0faa1d | 1745 | } else { |
76d7553f | 1746 | PERROR("start consumer fork"); |
8c0faa1d | 1747 | ret = -errno; |
8c0faa1d | 1748 | } |
8f4905da | 1749 | error: |
8c0faa1d DG |
1750 | return ret; |
1751 | } | |
1752 | ||
693bd40b | 1753 | /* |
3bd1e081 | 1754 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 1755 | */ |
3bd1e081 | 1756 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b DG |
1757 | { |
1758 | int ret; | |
1759 | ||
3bd1e081 MD |
1760 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1761 | if (consumer_data->pid != 0) { | |
1762 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
1763 | goto end; |
1764 | } | |
693bd40b | 1765 | |
3bd1e081 | 1766 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 1767 | if (ret < 0) { |
3bd1e081 MD |
1768 | ERR("Spawning consumerd failed"); |
1769 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 1770 | goto error; |
693bd40b | 1771 | } |
c49dc785 | 1772 | |
3bd1e081 MD |
1773 | /* Setting up the consumer_data pid */ |
1774 | consumer_data->pid = ret; | |
48842b30 | 1775 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 1776 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 1777 | |
3bd1e081 MD |
1778 | DBG2("Spawning consumer control thread"); |
1779 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 1780 | if (ret < 0) { |
3bd1e081 | 1781 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
1782 | goto error; |
1783 | } | |
1784 | ||
c49dc785 | 1785 | end: |
693bd40b DG |
1786 | return 0; |
1787 | ||
1788 | error: | |
1789 | return ret; | |
1790 | } | |
1791 | ||
b73401da | 1792 | /* |
096102bd | 1793 | * Check version of the lttng-modules. |
b73401da | 1794 | */ |
096102bd | 1795 | static int validate_lttng_modules_version(void) |
b73401da | 1796 | { |
096102bd | 1797 | return kernel_validate_version(kernel_tracer_fd); |
ab147185 MD |
1798 | } |
1799 | ||
b73401da | 1800 | /* |
096102bd | 1801 | * Setup necessary data for kernel tracer action. |
b73401da | 1802 | */ |
096102bd | 1803 | static int init_kernel_tracer(void) |
b73401da DG |
1804 | { |
1805 | int ret; | |
b73401da | 1806 | |
096102bd DG |
1807 | /* Modprobe lttng kernel modules */ |
1808 | ret = modprobe_lttng_control(); | |
b73401da | 1809 | if (ret < 0) { |
b73401da DG |
1810 | goto error; |
1811 | } | |
1812 | ||
096102bd DG |
1813 | /* Open debugfs lttng */ |
1814 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
1815 | if (kernel_tracer_fd < 0) { | |
1816 | DBG("Failed to open %s", module_proc_lttng); | |
1817 | ret = -1; | |
1818 | goto error_open; | |
b73401da DG |
1819 | } |
1820 | ||
096102bd DG |
1821 | /* Validate kernel version */ |
1822 | ret = validate_lttng_modules_version(); | |
b73401da | 1823 | if (ret < 0) { |
096102bd | 1824 | goto error_version; |
b73401da DG |
1825 | } |
1826 | ||
096102bd | 1827 | ret = modprobe_lttng_data(); |
b73401da | 1828 | if (ret < 0) { |
096102bd | 1829 | goto error_modules; |
8c0faa1d DG |
1830 | } |
1831 | ||
f3ed775e | 1832 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
096102bd DG |
1833 | return 0; |
1834 | ||
1835 | error_version: | |
1836 | modprobe_remove_lttng_control(); | |
76d7553f MD |
1837 | ret = close(kernel_tracer_fd); |
1838 | if (ret) { | |
1839 | PERROR("close"); | |
1840 | } | |
1841 | kernel_tracer_fd = -1; | |
096102bd DG |
1842 | return LTTCOMM_KERN_VERSION; |
1843 | ||
1844 | error_modules: | |
76d7553f MD |
1845 | ret = close(kernel_tracer_fd); |
1846 | if (ret) { | |
1847 | PERROR("close"); | |
1848 | } | |
096102bd DG |
1849 | |
1850 | error_open: | |
1851 | modprobe_remove_lttng_control(); | |
b73401da DG |
1852 | |
1853 | error: | |
b73401da | 1854 | WARN("No kernel tracer available"); |
a4b35e07 | 1855 | kernel_tracer_fd = -1; |
531d29f9 MD |
1856 | if (!is_root) { |
1857 | return LTTCOMM_NEED_ROOT_SESSIOND; | |
1858 | } else { | |
1859 | return LTTCOMM_KERN_NA; | |
1860 | } | |
f3ed775e | 1861 | } |
33a2b854 | 1862 | |
f3ed775e | 1863 | /* |
54d01ffb | 1864 | * Init tracing by creating trace directory and sending fds kernel consumer. |
f3ed775e | 1865 | */ |
54d01ffb | 1866 | static int init_kernel_tracing(struct ltt_kernel_session *session) |
f3ed775e | 1867 | { |
f40799e8 | 1868 | int ret = 0; |
8c0faa1d | 1869 | |
3bd1e081 | 1870 | if (session->consumer_fds_sent == 0) { |
d9800920 | 1871 | /* |
54d01ffb | 1872 | * Assign default kernel consumer socket if no consumer assigned to the |
03550b58 | 1873 | * kernel session. At this point, it's NOT supposed to be -1 but this is |
54d01ffb | 1874 | * an extra security check. |
d9800920 | 1875 | */ |
03550b58 | 1876 | if (session->consumer_fd < 0) { |
3bd1e081 | 1877 | session->consumer_fd = kconsumer_data.cmd_sock; |
d9800920 DG |
1878 | } |
1879 | ||
2bdd86d4 | 1880 | ret = send_kconsumer_session_streams(&kconsumer_data, session); |
f3ed775e | 1881 | if (ret < 0) { |
f3ed775e DG |
1882 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
1883 | goto error; | |
1884 | } | |
1d4b027a | 1885 | |
3bd1e081 | 1886 | session->consumer_fds_sent = 1; |
f3ed775e | 1887 | } |
1d4b027a DG |
1888 | |
1889 | error: | |
1890 | return ret; | |
8c0faa1d DG |
1891 | } |
1892 | ||
0177d773 DG |
1893 | /* |
1894 | * Create an UST session and add it to the session ust list. | |
1895 | */ | |
44d3bd01 | 1896 | static int create_ust_session(struct ltt_session *session, |
6df2e2c9 | 1897 | struct lttng_domain *domain) |
0177d773 | 1898 | { |
13384287 | 1899 | struct ltt_ust_session *lus = NULL; |
6df2e2c9 | 1900 | int ret; |
44d3bd01 DG |
1901 | |
1902 | switch (domain->type) { | |
48842b30 | 1903 | case LTTNG_DOMAIN_UST: |
44d3bd01 DG |
1904 | break; |
1905 | default: | |
13384287 | 1906 | ret = LTTCOMM_UNKNOWN_DOMAIN; |
44d3bd01 DG |
1907 | goto error; |
1908 | } | |
0177d773 DG |
1909 | |
1910 | DBG("Creating UST session"); | |
1911 | ||
a991f516 | 1912 | lus = trace_ust_create_session(session->path, session->id, domain); |
0177d773 | 1913 | if (lus == NULL) { |
44d3bd01 | 1914 | ret = LTTCOMM_UST_SESS_FAIL; |
0177d773 DG |
1915 | goto error; |
1916 | } | |
1917 | ||
e11d277b | 1918 | ret = run_as_mkdir_recursive(lus->pathname, S_IRWXU | S_IRWXG, |
6df2e2c9 | 1919 | session->uid, session->gid); |
0177d773 DG |
1920 | if (ret < 0) { |
1921 | if (ret != -EEXIST) { | |
1922 | ERR("Trace directory creation error"); | |
44d3bd01 | 1923 | ret = LTTCOMM_UST_SESS_FAIL; |
0177d773 DG |
1924 | goto error; |
1925 | } | |
1926 | } | |
1927 | ||
f6a9efaa DG |
1928 | /* The domain type dictate different actions on session creation */ |
1929 | switch (domain->type) { | |
48842b30 DG |
1930 | case LTTNG_DOMAIN_UST: |
1931 | /* No ustctl for the global UST domain */ | |
1932 | break; | |
1933 | default: | |
36dc12cc | 1934 | ERR("Unknown UST domain on create session %d", domain->type); |
48842b30 | 1935 | goto error; |
0177d773 | 1936 | } |
6df2e2c9 MD |
1937 | lus->uid = session->uid; |
1938 | lus->gid = session->gid; | |
f6a9efaa | 1939 | session->ust_session = lus; |
44d3bd01 DG |
1940 | |
1941 | return LTTCOMM_OK; | |
0177d773 DG |
1942 | |
1943 | error: | |
1944 | free(lus); | |
1945 | return ret; | |
1946 | } | |
1947 | ||
333f285e | 1948 | /* |
d063d709 | 1949 | * Create a kernel tracer session then create the default channel. |
333f285e | 1950 | */ |
6df2e2c9 | 1951 | static int create_kernel_session(struct ltt_session *session) |
333f285e | 1952 | { |
f3ed775e | 1953 | int ret; |
f3ed775e DG |
1954 | |
1955 | DBG("Creating kernel session"); | |
1956 | ||
1957 | ret = kernel_create_session(session, kernel_tracer_fd); | |
1958 | if (ret < 0) { | |
1959 | ret = LTTCOMM_KERN_SESS_FAIL; | |
1960 | goto error; | |
333f285e DG |
1961 | } |
1962 | ||
d9800920 | 1963 | /* Set kernel consumer socket fd */ |
03550b58 | 1964 | if (kconsumer_data.cmd_sock >= 0) { |
3bd1e081 | 1965 | session->kernel_session->consumer_fd = kconsumer_data.cmd_sock; |
d9800920 DG |
1966 | } |
1967 | ||
e11d277b | 1968 | ret = run_as_mkdir_recursive(session->kernel_session->trace_path, |
6df2e2c9 | 1969 | S_IRWXU | S_IRWXG, session->uid, session->gid); |
7a485870 | 1970 | if (ret < 0) { |
996b65c8 | 1971 | if (ret != -EEXIST) { |
7a485870 DG |
1972 | ERR("Trace directory creation error"); |
1973 | goto error; | |
1974 | } | |
1975 | } | |
6df2e2c9 MD |
1976 | session->kernel_session->uid = session->uid; |
1977 | session->kernel_session->gid = session->gid; | |
7a485870 | 1978 | |
f3ed775e DG |
1979 | error: |
1980 | return ret; | |
333f285e DG |
1981 | } |
1982 | ||
8e0af1b4 | 1983 | /* |
c7704d57 DG |
1984 | * Check if the UID or GID match the session. Root user has access to all |
1985 | * sessions. | |
8e0af1b4 | 1986 | */ |
c7704d57 | 1987 | static int session_access_ok(struct ltt_session *session, uid_t uid, gid_t gid) |
8e0af1b4 | 1988 | { |
c7704d57 | 1989 | if (uid != session->uid && gid != session->gid && uid != 0) { |
8e0af1b4 MD |
1990 | return 0; |
1991 | } else { | |
1992 | return 1; | |
1993 | } | |
1994 | } | |
1995 | ||
1996 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
1997 | { | |
1998 | unsigned int i = 0; | |
1999 | struct ltt_session *session; | |
2000 | ||
2001 | DBG("Counting number of available session for UID %d GID %d", | |
2002 | uid, gid); | |
2003 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
2004 | /* | |
2005 | * Only list the sessions the user can control. | |
2006 | */ | |
2007 | if (!session_access_ok(session, uid, gid)) { | |
2008 | continue; | |
2009 | } | |
2010 | i++; | |
2011 | } | |
2012 | return i; | |
2013 | } | |
2014 | ||
6c9cc2ab DG |
2015 | /* |
2016 | * Using the session list, filled a lttng_session array to send back to the | |
2017 | * client for session listing. | |
2018 | * | |
2019 | * The session list lock MUST be acquired before calling this function. Use | |
54d01ffb | 2020 | * session_lock_list() and session_unlock_list(). |
6c9cc2ab | 2021 | */ |
c7704d57 DG |
2022 | static void list_lttng_sessions(struct lttng_session *sessions, uid_t uid, |
2023 | gid_t gid) | |
6c9cc2ab | 2024 | { |
8e0af1b4 | 2025 | unsigned int i = 0; |
6c9cc2ab DG |
2026 | struct ltt_session *session; |
2027 | ||
8e0af1b4 MD |
2028 | DBG("Getting all available session for UID %d GID %d", |
2029 | uid, gid); | |
6c9cc2ab DG |
2030 | /* |
2031 | * Iterate over session list and append data after the control struct in | |
2032 | * the buffer. | |
2033 | */ | |
2034 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
8e0af1b4 MD |
2035 | /* |
2036 | * Only list the sessions the user can control. | |
2037 | */ | |
2038 | if (!session_access_ok(session, uid, gid)) { | |
2039 | continue; | |
2040 | } | |
6c9cc2ab | 2041 | strncpy(sessions[i].path, session->path, PATH_MAX); |
99497cd0 | 2042 | sessions[i].path[PATH_MAX - 1] = '\0'; |
6c9cc2ab | 2043 | strncpy(sessions[i].name, session->name, NAME_MAX); |
99497cd0 | 2044 | sessions[i].name[NAME_MAX - 1] = '\0'; |
464dd62d | 2045 | sessions[i].enabled = session->enabled; |
6c9cc2ab DG |
2046 | i++; |
2047 | } | |
2048 | } | |
2049 | ||
9f19cc17 DG |
2050 | /* |
2051 | * Fill lttng_channel array of all channels. | |
2052 | */ | |
b551a063 | 2053 | static void list_lttng_channels(int domain, struct ltt_session *session, |
9f19cc17 DG |
2054 | struct lttng_channel *channels) |
2055 | { | |
2056 | int i = 0; | |
2057 | struct ltt_kernel_channel *kchan; | |
2058 | ||
2059 | DBG("Listing channels for session %s", session->name); | |
2060 | ||
b551a063 DG |
2061 | switch (domain) { |
2062 | case LTTNG_DOMAIN_KERNEL: | |
2063 | /* Kernel channels */ | |
2064 | if (session->kernel_session != NULL) { | |
2065 | cds_list_for_each_entry(kchan, | |
2066 | &session->kernel_session->channel_list.head, list) { | |
2067 | /* Copy lttng_channel struct to array */ | |
2068 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
2069 | channels[i].enabled = kchan->enabled; | |
2070 | i++; | |
2071 | } | |
2072 | } | |
2073 | break; | |
2074 | case LTTNG_DOMAIN_UST: | |
2075 | { | |
bec39940 | 2076 | struct lttng_ht_iter iter; |
b551a063 DG |
2077 | struct ltt_ust_channel *uchan; |
2078 | ||
bec39940 DG |
2079 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
2080 | &iter.iter, uchan, node.node) { | |
b551a063 DG |
2081 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); |
2082 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
2083 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
2084 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
2085 | channels[i].attr.switch_timer_interval = | |
2086 | uchan->attr.switch_timer_interval; | |
2087 | channels[i].attr.read_timer_interval = | |
2088 | uchan->attr.read_timer_interval; | |
aea829b3 | 2089 | channels[i].enabled = uchan->enabled; |
5edd7e09 DG |
2090 | switch (uchan->attr.output) { |
2091 | case LTTNG_UST_MMAP: | |
2092 | default: | |
2093 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
2094 | break; | |
2095 | } | |
befe0905 | 2096 | i++; |
b551a063 DG |
2097 | } |
2098 | break; | |
2099 | } | |
2100 | default: | |
2101 | break; | |
2102 | } | |
2103 | } | |
2104 | ||
2105 | /* | |
2106 | * Create a list of ust global domain events. | |
2107 | */ | |
2108 | static int list_lttng_ust_global_events(char *channel_name, | |
2109 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
2110 | { | |
2111 | int i = 0, ret = 0; | |
2112 | unsigned int nb_event = 0; | |
bec39940 DG |
2113 | struct lttng_ht_iter iter; |
2114 | struct lttng_ht_node_str *node; | |
b551a063 DG |
2115 | struct ltt_ust_channel *uchan; |
2116 | struct ltt_ust_event *uevent; | |
2117 | struct lttng_event *tmp; | |
2118 | ||
2119 | DBG("Listing UST global events for channel %s", channel_name); | |
2120 | ||
2121 | rcu_read_lock(); | |
2122 | ||
bec39940 DG |
2123 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); |
2124 | node = lttng_ht_iter_get_node_str(&iter); | |
d7b75b30 DG |
2125 | if (node == NULL) { |
2126 | ret = -LTTCOMM_UST_CHAN_NOT_FOUND; | |
2127 | goto error; | |
b551a063 DG |
2128 | } |
2129 | ||
bec39940 | 2130 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); |
d7b75b30 | 2131 | |
bec39940 | 2132 | nb_event += lttng_ht_get_count(uchan->events); |
d7b75b30 | 2133 | |
b551a063 DG |
2134 | if (nb_event == 0) { |
2135 | ret = nb_event; | |
2136 | goto error; | |
2137 | } | |
2138 | ||
2139 | DBG3("Listing UST global %d events", nb_event); | |
2140 | ||
2141 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
2142 | if (tmp == NULL) { | |
2143 | ret = -LTTCOMM_FATAL; | |
2144 | goto error; | |
2145 | } | |
2146 | ||
bec39940 | 2147 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
d7b75b30 DG |
2148 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); |
2149 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
2150 | tmp[i].enabled = uevent->enabled; | |
2151 | switch (uevent->attr.instrumentation) { | |
2152 | case LTTNG_UST_TRACEPOINT: | |
2153 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
2154 | break; | |
2155 | case LTTNG_UST_PROBE: | |
2156 | tmp[i].type = LTTNG_EVENT_PROBE; | |
2157 | break; | |
2158 | case LTTNG_UST_FUNCTION: | |
2159 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
2160 | break; | |
0cda4f28 | 2161 | } |
8005f29a | 2162 | tmp[i].loglevel = uevent->attr.loglevel; |
0cda4f28 | 2163 | switch (uevent->attr.loglevel_type) { |
8005f29a | 2164 | case LTTNG_UST_LOGLEVEL_ALL: |
22e25b71 | 2165 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
0cda4f28 | 2166 | break; |
8005f29a | 2167 | case LTTNG_UST_LOGLEVEL_RANGE: |
22e25b71 | 2168 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; |
8005f29a MD |
2169 | break; |
2170 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
22e25b71 | 2171 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; |
ac3bd9c0 | 2172 | break; |
9f19cc17 | 2173 | } |
d7b75b30 | 2174 | i++; |
9f19cc17 DG |
2175 | } |
2176 | ||
b551a063 DG |
2177 | ret = nb_event; |
2178 | *events = tmp; | |
2179 | ||
2180 | error: | |
2181 | rcu_read_unlock(); | |
2182 | return ret; | |
9f19cc17 DG |
2183 | } |
2184 | ||
2185 | /* | |
b551a063 | 2186 | * Fill lttng_event array of all kernel events in the channel. |
9f19cc17 | 2187 | */ |
b551a063 DG |
2188 | static int list_lttng_kernel_events(char *channel_name, |
2189 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
9f19cc17 | 2190 | { |
b551a063 DG |
2191 | int i = 0, ret; |
2192 | unsigned int nb_event; | |
9f19cc17 | 2193 | struct ltt_kernel_event *event; |
b551a063 DG |
2194 | struct ltt_kernel_channel *kchan; |
2195 | ||
2196 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
2197 | if (kchan == NULL) { | |
2198 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2199 | goto error; | |
2200 | } | |
2201 | ||
2202 | nb_event = kchan->event_count; | |
9f19cc17 DG |
2203 | |
2204 | DBG("Listing events for channel %s", kchan->channel->name); | |
2205 | ||
b551a063 DG |
2206 | if (nb_event == 0) { |
2207 | ret = nb_event; | |
2208 | goto error; | |
2209 | } | |
2210 | ||
2211 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
2212 | if (*events == NULL) { | |
2213 | ret = LTTCOMM_FATAL; | |
2214 | goto error; | |
2215 | } | |
2216 | ||
9f19cc17 DG |
2217 | /* Kernel channels */ |
2218 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
b551a063 DG |
2219 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); |
2220 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
2221 | (*events)[i].enabled = event->enabled; | |
9f19cc17 DG |
2222 | switch (event->event->instrumentation) { |
2223 | case LTTNG_KERNEL_TRACEPOINT: | |
b551a063 | 2224 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; |
9f19cc17 DG |
2225 | break; |
2226 | case LTTNG_KERNEL_KPROBE: | |
2227 | case LTTNG_KERNEL_KRETPROBE: | |
b551a063 DG |
2228 | (*events)[i].type = LTTNG_EVENT_PROBE; |
2229 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
9f19cc17 DG |
2230 | sizeof(struct lttng_kernel_kprobe)); |
2231 | break; | |
2232 | case LTTNG_KERNEL_FUNCTION: | |
b551a063 DG |
2233 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
2234 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
9f19cc17 DG |
2235 | sizeof(struct lttng_kernel_function)); |
2236 | break; | |
0133c199 | 2237 | case LTTNG_KERNEL_NOOP: |
b551a063 | 2238 | (*events)[i].type = LTTNG_EVENT_NOOP; |
0133c199 | 2239 | break; |
a54bd42d | 2240 | case LTTNG_KERNEL_SYSCALL: |
b551a063 | 2241 | (*events)[i].type = LTTNG_EVENT_SYSCALL; |
0133c199 | 2242 | break; |
7a3d1328 MD |
2243 | case LTTNG_KERNEL_ALL: |
2244 | assert(0); | |
2245 | break; | |
9f19cc17 DG |
2246 | } |
2247 | i++; | |
2248 | } | |
b551a063 DG |
2249 | |
2250 | return nb_event; | |
2251 | ||
2252 | error: | |
2253 | return ret; | |
9f19cc17 DG |
2254 | } |
2255 | ||
fac6795d | 2256 | /* |
54d01ffb | 2257 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. |
fac6795d | 2258 | */ |
54d01ffb DG |
2259 | static int cmd_disable_channel(struct ltt_session *session, |
2260 | int domain, char *channel_name) | |
fac6795d | 2261 | { |
54d01ffb | 2262 | int ret; |
78f0bacd DG |
2263 | struct ltt_ust_session *usess; |
2264 | ||
2265 | usess = session->ust_session; | |
379473d2 | 2266 | |
54d01ffb | 2267 | switch (domain) { |
78f0bacd DG |
2268 | case LTTNG_DOMAIN_KERNEL: |
2269 | { | |
2270 | ret = channel_kernel_disable(session->kernel_session, | |
2271 | channel_name); | |
2272 | if (ret != LTTCOMM_OK) { | |
2273 | goto error; | |
2274 | } | |
54d01ffb | 2275 | |
78f0bacd DG |
2276 | kernel_wait_quiescent(kernel_tracer_fd); |
2277 | break; | |
2278 | } | |
2279 | case LTTNG_DOMAIN_UST: | |
2280 | { | |
2281 | struct ltt_ust_channel *uchan; | |
bec39940 | 2282 | struct lttng_ht *chan_ht; |
78f0bacd | 2283 | |
7885e399 DG |
2284 | chan_ht = usess->domain_global.channels; |
2285 | ||
2286 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
78f0bacd DG |
2287 | if (uchan == NULL) { |
2288 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
54d01ffb | 2289 | goto error; |
78f0bacd DG |
2290 | } |
2291 | ||
7885e399 DG |
2292 | ret = channel_ust_disable(usess, domain, uchan); |
2293 | if (ret != LTTCOMM_OK) { | |
78f0bacd DG |
2294 | goto error; |
2295 | } | |
78f0bacd DG |
2296 | break; |
2297 | } | |
d78d6610 | 2298 | #if 0 |
78f0bacd DG |
2299 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: |
2300 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
2301 | case LTTNG_DOMAIN_UST_PID: | |
d78d6610 | 2302 | #endif |
78f0bacd DG |
2303 | default: |
2304 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2305 | goto error; | |
20fe2104 DG |
2306 | } |
2307 | ||
54d01ffb | 2308 | ret = LTTCOMM_OK; |
d65106b1 | 2309 | |
54d01ffb DG |
2310 | error: |
2311 | return ret; | |
2312 | } | |
2313 | ||
2314 | /* | |
2315 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
2316 | */ | |
44d3bd01 | 2317 | static int cmd_enable_channel(struct ltt_session *session, |
aea829b3 | 2318 | int domain, struct lttng_channel *attr) |
54d01ffb DG |
2319 | { |
2320 | int ret; | |
f6a9efaa | 2321 | struct ltt_ust_session *usess = session->ust_session; |
bec39940 | 2322 | struct lttng_ht *chan_ht; |
f6a9efaa | 2323 | |
5d56b5aa | 2324 | DBG("Enabling channel %s for session %s", attr->name, session->name); |
d65106b1 | 2325 | |
aea829b3 | 2326 | switch (domain) { |
44d3bd01 DG |
2327 | case LTTNG_DOMAIN_KERNEL: |
2328 | { | |
2329 | struct ltt_kernel_channel *kchan; | |
54d01ffb | 2330 | |
44d3bd01 DG |
2331 | kchan = trace_kernel_get_channel_by_name(attr->name, |
2332 | session->kernel_session); | |
2333 | if (kchan == NULL) { | |
2334 | ret = channel_kernel_create(session->kernel_session, | |
2335 | attr, kernel_poll_pipe[1]); | |
2336 | } else { | |
2337 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
2338 | } | |
2339 | ||
2340 | if (ret != LTTCOMM_OK) { | |
2341 | goto error; | |
2342 | } | |
2343 | ||
2344 | kernel_wait_quiescent(kernel_tracer_fd); | |
2345 | break; | |
2346 | } | |
f6a9efaa DG |
2347 | case LTTNG_DOMAIN_UST: |
2348 | { | |
2349 | struct ltt_ust_channel *uchan; | |
2350 | ||
7885e399 | 2351 | chan_ht = usess->domain_global.channels; |
f6a9efaa | 2352 | |
7885e399 | 2353 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); |
f6a9efaa | 2354 | if (uchan == NULL) { |
7885e399 | 2355 | ret = channel_ust_create(usess, domain, attr); |
f6a9efaa | 2356 | } else { |
7885e399 | 2357 | ret = channel_ust_enable(usess, domain, uchan); |
48842b30 | 2358 | } |
f6a9efaa DG |
2359 | break; |
2360 | } | |
d78d6610 | 2361 | #if 0 |
78f0bacd DG |
2362 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: |
2363 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
44d3bd01 | 2364 | case LTTNG_DOMAIN_UST_PID: |
d78d6610 | 2365 | #endif |
44d3bd01 DG |
2366 | default: |
2367 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2368 | goto error; | |
54d01ffb DG |
2369 | } |
2370 | ||
54d01ffb DG |
2371 | error: |
2372 | return ret; | |
2373 | } | |
2374 | ||
2375 | /* | |
2376 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
2377 | */ | |
2378 | static int cmd_disable_event(struct ltt_session *session, int domain, | |
2379 | char *channel_name, char *event_name) | |
2380 | { | |
2381 | int ret; | |
54d01ffb DG |
2382 | |
2383 | switch (domain) { | |
2384 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
2385 | { |
2386 | struct ltt_kernel_channel *kchan; | |
b0a40d28 | 2387 | struct ltt_kernel_session *ksess; |
2bdd86d4 | 2388 | |
b0a40d28 DG |
2389 | ksess = session->kernel_session; |
2390 | ||
2391 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
54d01ffb DG |
2392 | if (kchan == NULL) { |
2393 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2394 | goto error; | |
d65106b1 DG |
2395 | } |
2396 | ||
b0a40d28 | 2397 | ret = event_kernel_disable_tracepoint(ksess, kchan, event_name); |
54d01ffb DG |
2398 | if (ret != LTTCOMM_OK) { |
2399 | goto error; | |
2400 | } | |
2401 | ||
2402 | kernel_wait_quiescent(kernel_tracer_fd); | |
d65106b1 | 2403 | break; |
2bdd86d4 MD |
2404 | } |
2405 | case LTTNG_DOMAIN_UST: | |
b0a40d28 | 2406 | { |
b0a40d28 | 2407 | struct ltt_ust_channel *uchan; |
7f79d3a1 | 2408 | struct ltt_ust_session *usess; |
b0a40d28 DG |
2409 | |
2410 | usess = session->ust_session; | |
2411 | ||
2412 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2413 | channel_name); | |
2414 | if (uchan == NULL) { | |
2415 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
2416 | goto error; | |
2417 | } | |
2418 | ||
7f79d3a1 DG |
2419 | ret = event_ust_disable_tracepoint(usess, domain, uchan, event_name); |
2420 | if (ret != LTTCOMM_OK) { | |
b0a40d28 DG |
2421 | goto error; |
2422 | } | |
2423 | ||
7f79d3a1 | 2424 | DBG3("Disable UST event %s in channel %s completed", event_name, |
b0a40d28 | 2425 | channel_name); |
b0a40d28 DG |
2426 | break; |
2427 | } | |
d78d6610 | 2428 | #if 0 |
2bdd86d4 MD |
2429 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2430 | case LTTNG_DOMAIN_UST_PID: | |
2431 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2432 | #endif |
54d01ffb | 2433 | default: |
1ab1ea0b | 2434 | ret = LTTCOMM_UND; |
54d01ffb | 2435 | goto error; |
d65106b1 | 2436 | } |
26cc6b4e | 2437 | |
54d01ffb DG |
2438 | ret = LTTCOMM_OK; |
2439 | ||
2440 | error: | |
2441 | return ret; | |
2442 | } | |
2443 | ||
2444 | /* | |
2445 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
2446 | */ | |
2447 | static int cmd_disable_event_all(struct ltt_session *session, int domain, | |
2448 | char *channel_name) | |
2449 | { | |
2450 | int ret; | |
54d01ffb DG |
2451 | |
2452 | switch (domain) { | |
2453 | case LTTNG_DOMAIN_KERNEL: | |
9730260e DG |
2454 | { |
2455 | struct ltt_kernel_session *ksess; | |
2456 | struct ltt_kernel_channel *kchan; | |
2457 | ||
2458 | ksess = session->kernel_session; | |
2459 | ||
2460 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
54d01ffb DG |
2461 | if (kchan == NULL) { |
2462 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2463 | goto error; | |
26cc6b4e DG |
2464 | } |
2465 | ||
9730260e | 2466 | ret = event_kernel_disable_all(ksess, kchan); |
54d01ffb | 2467 | if (ret != LTTCOMM_OK) { |
0b97ec54 | 2468 | goto error; |
26cc6b4e DG |
2469 | } |
2470 | ||
54d01ffb | 2471 | kernel_wait_quiescent(kernel_tracer_fd); |
26cc6b4e | 2472 | break; |
9730260e DG |
2473 | } |
2474 | case LTTNG_DOMAIN_UST: | |
2475 | { | |
2476 | struct ltt_ust_session *usess; | |
2477 | struct ltt_ust_channel *uchan; | |
2478 | ||
2479 | usess = session->ust_session; | |
2480 | ||
2481 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2482 | channel_name); | |
2483 | if (uchan == NULL) { | |
2484 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
2485 | goto error; | |
2486 | } | |
2487 | ||
7f79d3a1 DG |
2488 | ret = event_ust_disable_all_tracepoints(usess, domain, uchan); |
2489 | if (ret != 0) { | |
9730260e DG |
2490 | goto error; |
2491 | } | |
2492 | ||
7f79d3a1 | 2493 | DBG3("Disable all UST events in channel %s completed", channel_name); |
9730260e DG |
2494 | |
2495 | break; | |
2496 | } | |
d78d6610 | 2497 | #if 0 |
9730260e DG |
2498 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2499 | case LTTNG_DOMAIN_UST_PID: | |
2500 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2501 | #endif |
54d01ffb | 2502 | default: |
1ab1ea0b | 2503 | ret = LTTCOMM_UND; |
54d01ffb | 2504 | goto error; |
26cc6b4e | 2505 | } |
e953ef25 | 2506 | |
54d01ffb | 2507 | ret = LTTCOMM_OK; |
e953ef25 | 2508 | |
54d01ffb DG |
2509 | error: |
2510 | return ret; | |
2511 | } | |
f5177a38 | 2512 | |
54d01ffb DG |
2513 | /* |
2514 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
2515 | */ | |
2516 | static int cmd_add_context(struct ltt_session *session, int domain, | |
2517 | char *channel_name, char *event_name, struct lttng_event_context *ctx) | |
2518 | { | |
2519 | int ret; | |
f5177a38 | 2520 | |
54d01ffb DG |
2521 | switch (domain) { |
2522 | case LTTNG_DOMAIN_KERNEL: | |
2523 | /* Add kernel context to kernel tracer */ | |
2524 | ret = context_kernel_add(session->kernel_session, ctx, | |
2525 | event_name, channel_name); | |
2526 | if (ret != LTTCOMM_OK) { | |
f5177a38 | 2527 | goto error; |
e953ef25 | 2528 | } |
2bdd86d4 MD |
2529 | break; |
2530 | case LTTNG_DOMAIN_UST: | |
2531 | { | |
55cc08a6 | 2532 | struct ltt_ust_session *usess = session->ust_session; |
e953ef25 | 2533 | |
55cc08a6 DG |
2534 | ret = context_ust_add(usess, domain, ctx, event_name, channel_name); |
2535 | if (ret != LTTCOMM_OK) { | |
2536 | goto error; | |
2bdd86d4 | 2537 | } |
e953ef25 | 2538 | break; |
2bdd86d4 | 2539 | } |
d78d6610 | 2540 | #if 0 |
55cc08a6 DG |
2541 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2542 | case LTTNG_DOMAIN_UST_PID: | |
2543 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2544 | #endif |
54d01ffb | 2545 | default: |
1ab1ea0b | 2546 | ret = LTTCOMM_UND; |
54d01ffb | 2547 | goto error; |
e953ef25 | 2548 | } |
950131af | 2549 | |
54d01ffb | 2550 | ret = LTTCOMM_OK; |
950131af | 2551 | |
54d01ffb DG |
2552 | error: |
2553 | return ret; | |
2554 | } | |
2555 | ||
2556 | /* | |
2557 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2558 | */ | |
2559 | static int cmd_enable_event(struct ltt_session *session, int domain, | |
2560 | char *channel_name, struct lttng_event *event) | |
2561 | { | |
2562 | int ret; | |
f6cd6b0f | 2563 | struct lttng_channel *attr; |
48842b30 | 2564 | struct ltt_ust_session *usess = session->ust_session; |
54d01ffb DG |
2565 | |
2566 | switch (domain) { | |
2567 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
2568 | { |
2569 | struct ltt_kernel_channel *kchan; | |
2570 | ||
54d01ffb DG |
2571 | kchan = trace_kernel_get_channel_by_name(channel_name, |
2572 | session->kernel_session); | |
2573 | if (kchan == NULL) { | |
f6cd6b0f DG |
2574 | attr = channel_new_default_attr(domain); |
2575 | if (attr == NULL) { | |
2576 | ret = LTTCOMM_FATAL; | |
2577 | goto error; | |
2578 | } | |
2579 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
2580 | ||
54d01ffb | 2581 | /* This call will notify the kernel thread */ |
44d3bd01 | 2582 | ret = channel_kernel_create(session->kernel_session, |
f6cd6b0f | 2583 | attr, kernel_poll_pipe[1]); |
54d01ffb | 2584 | if (ret != LTTCOMM_OK) { |
ff4d74e6 | 2585 | free(attr); |
f5177a38 DG |
2586 | goto error; |
2587 | } | |
ff4d74e6 | 2588 | free(attr); |
54d01ffb | 2589 | } |
950131af | 2590 | |
54d01ffb DG |
2591 | /* Get the newly created kernel channel pointer */ |
2592 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2593 | session->kernel_session); | |
2594 | if (kchan == NULL) { | |
2595 | /* This sould not happen... */ | |
2596 | ret = LTTCOMM_FATAL; | |
2597 | goto error; | |
2598 | } | |
f5177a38 | 2599 | |
48842b30 DG |
2600 | ret = event_kernel_enable_tracepoint(session->kernel_session, kchan, |
2601 | event); | |
54d01ffb | 2602 | if (ret != LTTCOMM_OK) { |
f5177a38 | 2603 | goto error; |
950131af DG |
2604 | } |
2605 | ||
54d01ffb | 2606 | kernel_wait_quiescent(kernel_tracer_fd); |
950131af | 2607 | break; |
2bdd86d4 MD |
2608 | } |
2609 | case LTTNG_DOMAIN_UST: | |
2610 | { | |
aea829b3 | 2611 | struct lttng_channel *attr; |
edb67388 | 2612 | struct ltt_ust_channel *uchan; |
2bdd86d4 | 2613 | |
edb67388 | 2614 | /* Get channel from global UST domain */ |
48842b30 DG |
2615 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
2616 | channel_name); | |
2617 | if (uchan == NULL) { | |
aea829b3 DG |
2618 | /* Create default channel */ |
2619 | attr = channel_new_default_attr(domain); | |
2620 | if (attr == NULL) { | |
2621 | ret = LTTCOMM_FATAL; | |
2622 | goto error; | |
2623 | } | |
596219f7 | 2624 | snprintf(attr->name, NAME_MAX, "%s", channel_name); |
edb67388 | 2625 | attr->name[NAME_MAX - 1] = '\0'; |
aea829b3 | 2626 | |
7885e399 | 2627 | ret = channel_ust_create(usess, domain, attr); |
edb67388 | 2628 | if (ret != LTTCOMM_OK) { |
ff4d74e6 | 2629 | free(attr); |
aea829b3 DG |
2630 | goto error; |
2631 | } | |
aea829b3 DG |
2632 | free(attr); |
2633 | ||
2634 | /* Get the newly created channel reference back */ | |
2635 | uchan = trace_ust_find_channel_by_name( | |
2636 | usess->domain_global.channels, channel_name); | |
2637 | if (uchan == NULL) { | |
2638 | /* Something is really wrong */ | |
2639 | ret = LTTCOMM_FATAL; | |
2640 | goto error; | |
2641 | } | |
48842b30 | 2642 | } |
2bdd86d4 | 2643 | |
edb67388 | 2644 | /* At this point, the session and channel exist on the tracer */ |
edb67388 DG |
2645 | ret = event_ust_enable_tracepoint(usess, domain, uchan, event); |
2646 | if (ret != LTTCOMM_OK) { | |
48842b30 | 2647 | goto error; |
2bdd86d4 MD |
2648 | } |
2649 | break; | |
2650 | } | |
d78d6610 | 2651 | #if 0 |
2bdd86d4 MD |
2652 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2653 | case LTTNG_DOMAIN_UST_PID: | |
2654 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2655 | #endif |
54d01ffb | 2656 | default: |
1ab1ea0b | 2657 | ret = LTTCOMM_UND; |
54d01ffb | 2658 | goto error; |
950131af | 2659 | } |
d36b8583 | 2660 | |
54d01ffb | 2661 | ret = LTTCOMM_OK; |
d36b8583 | 2662 | |
54d01ffb DG |
2663 | error: |
2664 | return ret; | |
2665 | } | |
7d29a247 | 2666 | |
54d01ffb DG |
2667 | /* |
2668 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
2669 | */ | |
2670 | static int cmd_enable_event_all(struct ltt_session *session, int domain, | |
8c9ae521 | 2671 | char *channel_name, int event_type) |
54d01ffb DG |
2672 | { |
2673 | int ret; | |
2674 | struct ltt_kernel_channel *kchan; | |
7d29a247 | 2675 | |
54d01ffb DG |
2676 | switch (domain) { |
2677 | case LTTNG_DOMAIN_KERNEL: | |
2678 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2679 | session->kernel_session); | |
2680 | if (kchan == NULL) { | |
2681 | /* This call will notify the kernel thread */ | |
44d3bd01 DG |
2682 | ret = channel_kernel_create(session->kernel_session, NULL, |
2683 | kernel_poll_pipe[1]); | |
54d01ffb DG |
2684 | if (ret != LTTCOMM_OK) { |
2685 | goto error; | |
d36b8583 | 2686 | } |
0d0c377a | 2687 | |
8f69e5eb DG |
2688 | /* Get the newly created kernel channel pointer */ |
2689 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2690 | session->kernel_session); | |
2691 | if (kchan == NULL) { | |
2692 | /* This sould not happen... */ | |
2693 | ret = LTTCOMM_FATAL; | |
2694 | goto error; | |
2695 | } | |
2696 | ||
54d01ffb | 2697 | } |
0fdd1e2c | 2698 | |
7a3d1328 | 2699 | switch (event_type) { |
76d45b40 | 2700 | case LTTNG_EVENT_SYSCALL: |
7a3d1328 | 2701 | ret = event_kernel_enable_all_syscalls(session->kernel_session, |
8c9ae521 | 2702 | kchan, kernel_tracer_fd); |
7a3d1328 | 2703 | break; |
76d45b40 | 2704 | case LTTNG_EVENT_TRACEPOINT: |
8c9ae521 | 2705 | /* |
7a3d1328 MD |
2706 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and |
2707 | * events already registered to the channel. | |
8c9ae521 | 2708 | */ |
7a3d1328 MD |
2709 | ret = event_kernel_enable_all_tracepoints(session->kernel_session, |
2710 | kchan, kernel_tracer_fd); | |
2711 | break; | |
76d45b40 | 2712 | case LTTNG_EVENT_ALL: |
7a3d1328 | 2713 | /* Enable syscalls and tracepoints */ |
8c9ae521 DG |
2714 | ret = event_kernel_enable_all(session->kernel_session, |
2715 | kchan, kernel_tracer_fd); | |
7a3d1328 MD |
2716 | break; |
2717 | default: | |
2718 | ret = LTTCOMM_KERN_ENABLE_FAIL; | |
2719 | goto error; | |
8c9ae521 | 2720 | } |
8f69e5eb DG |
2721 | |
2722 | /* Manage return value */ | |
54d01ffb | 2723 | if (ret != LTTCOMM_OK) { |
0d0c377a | 2724 | goto error; |
d36b8583 DG |
2725 | } |
2726 | ||
54d01ffb | 2727 | kernel_wait_quiescent(kernel_tracer_fd); |
d36b8583 | 2728 | break; |
76d45b40 DG |
2729 | case LTTNG_DOMAIN_UST: |
2730 | { | |
2731 | struct lttng_channel *attr; | |
2732 | struct ltt_ust_channel *uchan; | |
2733 | struct ltt_ust_session *usess = session->ust_session; | |
2734 | ||
2735 | /* Get channel from global UST domain */ | |
2736 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2737 | channel_name); | |
2738 | if (uchan == NULL) { | |
2739 | /* Create default channel */ | |
2740 | attr = channel_new_default_attr(domain); | |
2741 | if (attr == NULL) { | |
2742 | ret = LTTCOMM_FATAL; | |
2743 | goto error; | |
2744 | } | |
2745 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
2746 | attr->name[NAME_MAX - 1] = '\0'; | |
2747 | ||
2748 | /* Use the internal command enable channel */ | |
7885e399 | 2749 | ret = channel_ust_create(usess, domain, attr); |
76d45b40 DG |
2750 | if (ret != LTTCOMM_OK) { |
2751 | free(attr); | |
2752 | goto error; | |
2753 | } | |
2754 | free(attr); | |
2755 | ||
2756 | /* Get the newly created channel reference back */ | |
2757 | uchan = trace_ust_find_channel_by_name( | |
2758 | usess->domain_global.channels, channel_name); | |
2759 | if (uchan == NULL) { | |
2760 | /* Something is really wrong */ | |
2761 | ret = LTTCOMM_FATAL; | |
2762 | goto error; | |
2763 | } | |
2764 | } | |
2765 | ||
2766 | /* At this point, the session and channel exist on the tracer */ | |
2767 | ||
2768 | switch (event_type) { | |
2769 | case LTTNG_EVENT_ALL: | |
2770 | case LTTNG_EVENT_TRACEPOINT: | |
2771 | ret = event_ust_enable_all_tracepoints(usess, domain, uchan); | |
2772 | if (ret != LTTCOMM_OK) { | |
2773 | goto error; | |
2774 | } | |
2775 | break; | |
2776 | default: | |
2777 | ret = LTTCOMM_UST_ENABLE_FAIL; | |
2778 | goto error; | |
2779 | } | |
2780 | ||
2781 | /* Manage return value */ | |
2782 | if (ret != LTTCOMM_OK) { | |
2783 | goto error; | |
2784 | } | |
2785 | ||
2786 | break; | |
2787 | } | |
d78d6610 | 2788 | #if 0 |
76d45b40 DG |
2789 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2790 | case LTTNG_DOMAIN_UST_PID: | |
2791 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2792 | #endif |
54d01ffb | 2793 | default: |
1ab1ea0b | 2794 | ret = LTTCOMM_UND; |
54d01ffb | 2795 | goto error; |
d36b8583 | 2796 | } |
f3ed775e | 2797 | |
54d01ffb DG |
2798 | ret = LTTCOMM_OK; |
2799 | ||
2800 | error: | |
2801 | return ret; | |
2802 | } | |
2803 | ||
2804 | /* | |
2805 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2806 | */ | |
2807 | static ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
2808 | { | |
2809 | int ret; | |
2810 | ssize_t nb_events = 0; | |
2811 | ||
2812 | switch (domain) { | |
2813 | case LTTNG_DOMAIN_KERNEL: | |
2814 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
2815 | if (nb_events < 0) { | |
2816 | ret = LTTCOMM_KERN_LIST_FAIL; | |
2817 | goto error; | |
894be886 | 2818 | } |
54d01ffb | 2819 | break; |
b551a063 DG |
2820 | case LTTNG_DOMAIN_UST: |
2821 | nb_events = ust_app_list_events(events); | |
2822 | if (nb_events < 0) { | |
2823 | ret = LTTCOMM_UST_LIST_FAIL; | |
2824 | goto error; | |
2825 | } | |
2826 | break; | |
54d01ffb | 2827 | default: |
1ab1ea0b | 2828 | ret = LTTCOMM_UND; |
54d01ffb DG |
2829 | goto error; |
2830 | } | |
894be886 | 2831 | |
54d01ffb | 2832 | return nb_events; |
7d29a247 | 2833 | |
54d01ffb DG |
2834 | error: |
2835 | /* Return negative value to differentiate return code */ | |
2836 | return -ret; | |
2837 | } | |
b389abbe | 2838 | |
54d01ffb DG |
2839 | /* |
2840 | * Command LTTNG_START_TRACE processed by the client thread. | |
2841 | */ | |
2842 | static int cmd_start_trace(struct ltt_session *session) | |
2843 | { | |
2844 | int ret; | |
54d01ffb | 2845 | struct ltt_kernel_session *ksession; |
b9d9b220 | 2846 | struct ltt_ust_session *usess; |
b389abbe | 2847 | |
54d01ffb DG |
2848 | /* Short cut */ |
2849 | ksession = session->kernel_session; | |
b9d9b220 | 2850 | usess = session->ust_session; |
5eb91c98 | 2851 | |
b9ef1c83 | 2852 | if (session->enabled) { |
80e327fa DG |
2853 | /* Already started. */ |
2854 | ret = LTTCOMM_TRACE_ALREADY_STARTED; | |
b9ef1c83 DG |
2855 | goto error; |
2856 | } | |
2857 | ||
464dd62d MD |
2858 | session->enabled = 1; |
2859 | ||
54d01ffb DG |
2860 | /* Kernel tracing */ |
2861 | if (ksession != NULL) { | |
2bdd86d4 MD |
2862 | struct ltt_kernel_channel *kchan; |
2863 | ||
54d01ffb DG |
2864 | /* Open kernel metadata */ |
2865 | if (ksession->metadata == NULL) { | |
2866 | ret = kernel_open_metadata(ksession, ksession->trace_path); | |
2867 | if (ret < 0) { | |
2868 | ret = LTTCOMM_KERN_META_FAIL; | |
2869 | goto error; | |
b389abbe | 2870 | } |
54d01ffb | 2871 | } |
7d29a247 | 2872 | |
54d01ffb | 2873 | /* Open kernel metadata stream */ |
03550b58 | 2874 | if (ksession->metadata_stream_fd < 0) { |
54d01ffb DG |
2875 | ret = kernel_open_metadata_stream(ksession); |
2876 | if (ret < 0) { | |
2877 | ERR("Kernel create metadata stream failed"); | |
2878 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
2879 | goto error; | |
2880 | } | |
2881 | } | |
2882 | ||
2883 | /* For each channel */ | |
2884 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
2885 | if (kchan->stream_count == 0) { | |
2886 | ret = kernel_open_channel_stream(kchan); | |
2887 | if (ret < 0) { | |
2888 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
7d29a247 DG |
2889 | goto error; |
2890 | } | |
54d01ffb DG |
2891 | /* Update the stream global counter */ |
2892 | ksession->stream_count_global += ret; | |
7d29a247 | 2893 | } |
54d01ffb DG |
2894 | } |
2895 | ||
2896 | /* Setup kernel consumer socket and send fds to it */ | |
2897 | ret = init_kernel_tracing(ksession); | |
2898 | if (ret < 0) { | |
2899 | ret = LTTCOMM_KERN_START_FAIL; | |
2900 | goto error; | |
2901 | } | |
2902 | ||
2903 | /* This start the kernel tracing */ | |
2904 | ret = kernel_start_session(ksession); | |
2905 | if (ret < 0) { | |
2906 | ret = LTTCOMM_KERN_START_FAIL; | |
2907 | goto error; | |
2908 | } | |
2909 | ||
2910 | /* Quiescent wait after starting trace */ | |
2911 | kernel_wait_quiescent(kernel_tracer_fd); | |
2912 | } | |
2913 | ||
36dc12cc | 2914 | /* Flag session that trace should start automatically */ |
b9d9b220 DG |
2915 | if (usess) { |
2916 | usess->start_trace = 1; | |
36dc12cc | 2917 | |
b9d9b220 DG |
2918 | ret = ust_app_start_trace_all(usess); |
2919 | if (ret < 0) { | |
2920 | ret = LTTCOMM_UST_START_FAIL; | |
2921 | goto error; | |
2922 | } | |
2bdd86d4 | 2923 | } |
54d01ffb DG |
2924 | |
2925 | ret = LTTCOMM_OK; | |
2926 | ||
2927 | error: | |
2928 | return ret; | |
2929 | } | |
2930 | ||
2931 | /* | |
2932 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2933 | */ | |
2934 | static int cmd_stop_trace(struct ltt_session *session) | |
2935 | { | |
2936 | int ret; | |
2937 | struct ltt_kernel_channel *kchan; | |
2938 | struct ltt_kernel_session *ksession; | |
8be98f9a | 2939 | struct ltt_ust_session *usess; |
54d01ffb DG |
2940 | |
2941 | /* Short cut */ | |
2942 | ksession = session->kernel_session; | |
8be98f9a | 2943 | usess = session->ust_session; |
54d01ffb | 2944 | |
b9ef1c83 | 2945 | if (!session->enabled) { |
80e327fa | 2946 | ret = LTTCOMM_TRACE_ALREADY_STOPPED; |
b9ef1c83 DG |
2947 | goto error; |
2948 | } | |
2949 | ||
464dd62d MD |
2950 | session->enabled = 0; |
2951 | ||
54d01ffb DG |
2952 | /* Kernel tracer */ |
2953 | if (ksession != NULL) { | |
2954 | DBG("Stop kernel tracing"); | |
2955 | ||
2956 | /* Flush all buffers before stopping */ | |
2957 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
2958 | if (ret < 0) { | |
2959 | ERR("Kernel metadata flush failed"); | |
2960 | } | |
f34daff7 | 2961 | |
54d01ffb DG |
2962 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { |
2963 | ret = kernel_flush_buffer(kchan); | |
0d0c377a | 2964 | if (ret < 0) { |
54d01ffb | 2965 | ERR("Kernel flush buffer error"); |
7d29a247 | 2966 | } |
54d01ffb | 2967 | } |
19e70852 | 2968 | |
54d01ffb DG |
2969 | ret = kernel_stop_session(ksession); |
2970 | if (ret < 0) { | |
2971 | ret = LTTCOMM_KERN_STOP_FAIL; | |
19e70852 | 2972 | goto error; |
f3ed775e | 2973 | } |
54d01ffb DG |
2974 | |
2975 | kernel_wait_quiescent(kernel_tracer_fd); | |
894be886 | 2976 | } |
54d01ffb | 2977 | |
8be98f9a MD |
2978 | if (usess) { |
2979 | usess->start_trace = 0; | |
2bdd86d4 | 2980 | |
8be98f9a | 2981 | ret = ust_app_stop_trace_all(usess); |
2bdd86d4 | 2982 | if (ret < 0) { |
190df5ac | 2983 | ret = LTTCOMM_UST_STOP_FAIL; |
2bdd86d4 MD |
2984 | goto error; |
2985 | } | |
2bdd86d4 | 2986 | } |
54d01ffb DG |
2987 | |
2988 | ret = LTTCOMM_OK; | |
2989 | ||
2990 | error: | |
2991 | return ret; | |
2992 | } | |
2993 | ||
2994 | /* | |
2995 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
2996 | */ | |
730389d9 | 2997 | static int cmd_create_session(char *name, char *path, lttng_sock_cred *creds) |
54d01ffb DG |
2998 | { |
2999 | int ret; | |
3000 | ||
730389d9 DG |
3001 | ret = session_create(name, path, LTTNG_SOCK_GET_UID_CRED(creds), |
3002 | LTTNG_SOCK_GET_GID_CRED(creds)); | |
54d01ffb DG |
3003 | if (ret != LTTCOMM_OK) { |
3004 | goto error; | |
3005 | } | |
3006 | ||
3007 | ret = LTTCOMM_OK; | |
3008 | ||
3009 | error: | |
3010 | return ret; | |
3011 | } | |
3012 | ||
3013 | /* | |
3014 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
3015 | */ | |
3016 | static int cmd_destroy_session(struct ltt_session *session, char *name) | |
3017 | { | |
3018 | int ret; | |
3019 | ||
3020 | /* Clean kernel session teardown */ | |
3021 | teardown_kernel_session(session); | |
84cd17c6 MD |
3022 | /* UST session teardown */ |
3023 | teardown_ust_session(session); | |
54d01ffb DG |
3024 | |
3025 | /* | |
3026 | * Must notify the kernel thread here to update it's poll setin order | |
3027 | * to remove the channel(s)' fd just destroyed. | |
3028 | */ | |
3029 | ret = notify_thread_pipe(kernel_poll_pipe[1]); | |
3030 | if (ret < 0) { | |
76d7553f | 3031 | PERROR("write kernel poll pipe"); |
54d01ffb DG |
3032 | } |
3033 | ||
271933a4 | 3034 | ret = session_destroy(session); |
54d01ffb DG |
3035 | |
3036 | return ret; | |
3037 | } | |
3038 | ||
3039 | /* | |
3040 | * Command LTTNG_CALIBRATE processed by the client thread. | |
3041 | */ | |
3042 | static int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
3043 | { | |
3044 | int ret; | |
3045 | ||
3046 | switch (domain) { | |
3047 | case LTTNG_DOMAIN_KERNEL: | |
33a2b854 | 3048 | { |
54d01ffb | 3049 | struct lttng_kernel_calibrate kcalibrate; |
33a2b854 | 3050 | |
54d01ffb DG |
3051 | kcalibrate.type = calibrate->type; |
3052 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
33a2b854 | 3053 | if (ret < 0) { |
54d01ffb DG |
3054 | ret = LTTCOMM_KERN_ENABLE_FAIL; |
3055 | goto error; | |
33a2b854 | 3056 | } |
54d01ffb DG |
3057 | break; |
3058 | } | |
4466912f DG |
3059 | case LTTNG_DOMAIN_UST: |
3060 | { | |
3061 | struct lttng_ust_calibrate ucalibrate; | |
3062 | ||
3063 | ucalibrate.type = calibrate->type; | |
3064 | ret = ust_app_calibrate_glb(&ucalibrate); | |
3065 | if (ret < 0) { | |
3066 | ret = LTTCOMM_UST_CALIBRATE_FAIL; | |
3067 | goto error; | |
3068 | } | |
3069 | break; | |
3070 | } | |
54d01ffb | 3071 | default: |
1ab1ea0b | 3072 | ret = LTTCOMM_UND; |
54d01ffb DG |
3073 | goto error; |
3074 | } | |
33a2b854 | 3075 | |
54d01ffb | 3076 | ret = LTTCOMM_OK; |
33a2b854 | 3077 | |
54d01ffb DG |
3078 | error: |
3079 | return ret; | |
3080 | } | |
7d29a247 | 3081 | |
54d01ffb DG |
3082 | /* |
3083 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
3084 | */ | |
3085 | static int cmd_register_consumer(struct ltt_session *session, int domain, | |
3086 | char *sock_path) | |
3087 | { | |
3088 | int ret, sock; | |
b389abbe | 3089 | |
54d01ffb DG |
3090 | switch (domain) { |
3091 | case LTTNG_DOMAIN_KERNEL: | |
3092 | /* Can't register a consumer if there is already one */ | |
48c4f28c | 3093 | if (session->kernel_session->consumer_fds_sent != 0) { |
54d01ffb DG |
3094 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
3095 | goto error; | |
3096 | } | |
3097 | ||
3098 | sock = lttcomm_connect_unix_sock(sock_path); | |
3099 | if (sock < 0) { | |
3100 | ret = LTTCOMM_CONNECT_FAIL; | |
3101 | goto error; | |
3102 | } | |
3103 | ||
3104 | session->kernel_session->consumer_fd = sock; | |
3105 | break; | |
3106 | default: | |
3107 | /* TODO: Userspace tracing */ | |
1ab1ea0b | 3108 | ret = LTTCOMM_UND; |
54d01ffb DG |
3109 | goto error; |
3110 | } | |
3111 | ||
3112 | ret = LTTCOMM_OK; | |
3113 | ||
3114 | error: | |
3115 | return ret; | |
3116 | } | |
3117 | ||
3118 | /* | |
3119 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
3120 | */ | |
3121 | static ssize_t cmd_list_domains(struct ltt_session *session, | |
3122 | struct lttng_domain **domains) | |
3123 | { | |
b551a063 | 3124 | int ret, index = 0; |
54d01ffb DG |
3125 | ssize_t nb_dom = 0; |
3126 | ||
3127 | if (session->kernel_session != NULL) { | |
b551a063 | 3128 | DBG3("Listing domains found kernel domain"); |
54d01ffb DG |
3129 | nb_dom++; |
3130 | } | |
3131 | ||
b551a063 DG |
3132 | if (session->ust_session != NULL) { |
3133 | DBG3("Listing domains found UST global domain"); | |
3134 | nb_dom++; | |
3135 | } | |
54d01ffb | 3136 | |
b551a063 | 3137 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
54d01ffb DG |
3138 | if (*domains == NULL) { |
3139 | ret = -LTTCOMM_FATAL; | |
3140 | goto error; | |
3141 | } | |
3142 | ||
b551a063 DG |
3143 | if (session->kernel_session != NULL) { |
3144 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
3145 | index++; | |
3146 | } | |
3147 | ||
3148 | if (session->ust_session != NULL) { | |
3149 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
3150 | index++; | |
3151 | } | |
54d01ffb | 3152 | |
54d01ffb DG |
3153 | return nb_dom; |
3154 | ||
3155 | error: | |
3156 | return ret; | |
3157 | } | |
3158 | ||
3159 | /* | |
3160 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
3161 | */ | |
b551a063 | 3162 | static ssize_t cmd_list_channels(int domain, struct ltt_session *session, |
54d01ffb DG |
3163 | struct lttng_channel **channels) |
3164 | { | |
3165 | int ret; | |
3166 | ssize_t nb_chan = 0; | |
3167 | ||
b551a063 DG |
3168 | switch (domain) { |
3169 | case LTTNG_DOMAIN_KERNEL: | |
3170 | if (session->kernel_session != NULL) { | |
3171 | nb_chan = session->kernel_session->channel_count; | |
3172 | } | |
0df502fd | 3173 | DBG3("Number of kernel channels %zd", nb_chan); |
b551a063 DG |
3174 | break; |
3175 | case LTTNG_DOMAIN_UST: | |
3176 | if (session->ust_session != NULL) { | |
bec39940 | 3177 | nb_chan = lttng_ht_get_count( |
b551a063 DG |
3178 | session->ust_session->domain_global.channels); |
3179 | } | |
0df502fd | 3180 | DBG3("Number of UST global channels %zd", nb_chan); |
b551a063 DG |
3181 | break; |
3182 | default: | |
3183 | *channels = NULL; | |
1ab1ea0b | 3184 | ret = -LTTCOMM_UND; |
54d01ffb DG |
3185 | goto error; |
3186 | } | |
3187 | ||
b551a063 DG |
3188 | if (nb_chan > 0) { |
3189 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
3190 | if (*channels == NULL) { | |
3191 | ret = -LTTCOMM_FATAL; | |
3192 | goto error; | |
3193 | } | |
54d01ffb | 3194 | |
b551a063 DG |
3195 | list_lttng_channels(domain, session, *channels); |
3196 | } else { | |
3197 | *channels = NULL; | |
3198 | } | |
2bdd86d4 | 3199 | |
54d01ffb DG |
3200 | return nb_chan; |
3201 | ||
3202 | error: | |
3203 | return ret; | |
3204 | } | |
3205 | ||
3206 | /* | |
3207 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
3208 | */ | |
b551a063 | 3209 | static ssize_t cmd_list_events(int domain, struct ltt_session *session, |
54d01ffb DG |
3210 | char *channel_name, struct lttng_event **events) |
3211 | { | |
b551a063 | 3212 | int ret = 0; |
54d01ffb | 3213 | ssize_t nb_event = 0; |
54d01ffb | 3214 | |
b551a063 DG |
3215 | switch (domain) { |
3216 | case LTTNG_DOMAIN_KERNEL: | |
3217 | if (session->kernel_session != NULL) { | |
3218 | nb_event = list_lttng_kernel_events(channel_name, | |
3219 | session->kernel_session, events); | |
54d01ffb | 3220 | } |
b551a063 DG |
3221 | break; |
3222 | case LTTNG_DOMAIN_UST: | |
3223 | { | |
3224 | if (session->ust_session != NULL) { | |
3225 | nb_event = list_lttng_ust_global_events(channel_name, | |
3226 | &session->ust_session->domain_global, events); | |
3227 | } | |
3228 | break; | |
54d01ffb | 3229 | } |
b551a063 | 3230 | default: |
1ab1ea0b | 3231 | ret = -LTTCOMM_UND; |
54d01ffb DG |
3232 | goto error; |
3233 | } | |
3234 | ||
b551a063 | 3235 | ret = nb_event; |
54d01ffb DG |
3236 | |
3237 | error: | |
3238 | return ret; | |
3239 | } | |
3240 | ||
3241 | /* | |
3242 | * Process the command requested by the lttng client within the command | |
3243 | * context structure. This function make sure that the return structure (llm) | |
3244 | * is set and ready for transmission before returning. | |
3245 | * | |
3246 | * Return any error encountered or 0 for success. | |
3247 | */ | |
3248 | static int process_client_msg(struct command_ctx *cmd_ctx) | |
3249 | { | |
3250 | int ret = LTTCOMM_OK; | |
44d3bd01 | 3251 | int need_tracing_session = 1; |
2e09ba09 | 3252 | int need_domain; |
54d01ffb DG |
3253 | |
3254 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
3255 | ||
2e09ba09 MD |
3256 | switch (cmd_ctx->lsm->cmd_type) { |
3257 | case LTTNG_CREATE_SESSION: | |
3258 | case LTTNG_DESTROY_SESSION: | |
3259 | case LTTNG_LIST_SESSIONS: | |
3260 | case LTTNG_LIST_DOMAINS: | |
3261 | case LTTNG_START_TRACE: | |
3262 | case LTTNG_STOP_TRACE: | |
3263 | need_domain = 0; | |
3aace903 | 3264 | break; |
2e09ba09 MD |
3265 | default: |
3266 | need_domain = 1; | |
3267 | } | |
3268 | ||
3269 | if (opt_no_kernel && need_domain | |
3270 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 MD |
3271 | if (!is_root) { |
3272 | ret = LTTCOMM_NEED_ROOT_SESSIOND; | |
3273 | } else { | |
3274 | ret = LTTCOMM_KERN_NA; | |
3275 | } | |
4fba7219 DG |
3276 | goto error; |
3277 | } | |
3278 | ||
54d01ffb DG |
3279 | /* |
3280 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 3281 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
3282 | * command. |
3283 | */ | |
3284 | switch(cmd_ctx->lsm->cmd_type) { | |
3285 | case LTTNG_LIST_SESSIONS: | |
3286 | case LTTNG_LIST_TRACEPOINTS: | |
3287 | case LTTNG_LIST_DOMAINS: | |
3288 | case LTTNG_LIST_CHANNELS: | |
3289 | case LTTNG_LIST_EVENTS: | |
3290 | break; | |
3291 | default: | |
3292 | /* Setup lttng message with no payload */ | |
3293 | ret = setup_lttng_msg(cmd_ctx, 0); | |
3294 | if (ret < 0) { | |
3295 | /* This label does not try to unlock the session */ | |
3296 | goto init_setup_error; | |
3297 | } | |
3298 | } | |
3299 | ||
3300 | /* Commands that DO NOT need a session. */ | |
3301 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 3302 | case LTTNG_CREATE_SESSION: |
2e09ba09 | 3303 | case LTTNG_CALIBRATE: |
54d01ffb DG |
3304 | case LTTNG_LIST_SESSIONS: |
3305 | case LTTNG_LIST_TRACEPOINTS: | |
44d3bd01 | 3306 | need_tracing_session = 0; |
54d01ffb DG |
3307 | break; |
3308 | default: | |
3309 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
74babd95 | 3310 | session_lock_list(); |
54d01ffb | 3311 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
74babd95 | 3312 | session_unlock_list(); |
54d01ffb DG |
3313 | if (cmd_ctx->session == NULL) { |
3314 | if (cmd_ctx->lsm->session.name != NULL) { | |
3315 | ret = LTTCOMM_SESS_NOT_FOUND; | |
3316 | } else { | |
3317 | /* If no session name specified */ | |
3318 | ret = LTTCOMM_SELECT_SESS; | |
3319 | } | |
3320 | goto error; | |
3321 | } else { | |
3322 | /* Acquire lock for the session */ | |
3323 | session_lock(cmd_ctx->session); | |
3324 | } | |
3325 | break; | |
3326 | } | |
b389abbe | 3327 | |
2e09ba09 MD |
3328 | if (!need_domain) { |
3329 | goto skip_domain; | |
3330 | } | |
54d01ffb DG |
3331 | /* |
3332 | * Check domain type for specific "pre-action". | |
3333 | */ | |
3334 | switch (cmd_ctx->lsm->domain.type) { | |
3335 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 3336 | if (!is_root) { |
531d29f9 | 3337 | ret = LTTCOMM_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
3338 | goto error; |
3339 | } | |
3340 | ||
54d01ffb | 3341 | /* Kernel tracer check */ |
a4b35e07 | 3342 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3343 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3344 | ret = init_kernel_tracer(); |
3345 | if (ret != 0) { | |
54d01ffb DG |
3346 | goto error; |
3347 | } | |
3348 | } | |
5eb91c98 | 3349 | |
54d01ffb | 3350 | /* Need a session for kernel command */ |
44d3bd01 | 3351 | if (need_tracing_session) { |
54d01ffb | 3352 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3353 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3354 | if (ret < 0) { |
54d01ffb | 3355 | ret = LTTCOMM_KERN_SESS_FAIL; |
5eb91c98 DG |
3356 | goto error; |
3357 | } | |
b389abbe | 3358 | } |
7d29a247 | 3359 | |
54d01ffb | 3360 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3361 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3362 | if (kconsumer_data.pid == 0 && | |
54d01ffb | 3363 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3364 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3365 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3366 | if (ret < 0) { |
54d01ffb DG |
3367 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
3368 | goto error; | |
950131af | 3369 | } |
3ff2ecac MD |
3370 | } else { |
3371 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3372 | } |
0d0c377a | 3373 | } |
54d01ffb | 3374 | break; |
2bdd86d4 | 3375 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3376 | { |
44d3bd01 | 3377 | if (need_tracing_session) { |
f6a9efaa | 3378 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3379 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3380 | &cmd_ctx->lsm->domain); |
44d3bd01 DG |
3381 | if (ret != LTTCOMM_OK) { |
3382 | goto error; | |
3383 | } | |
3384 | } | |
7753dea8 MD |
3385 | /* Start the UST consumer daemons */ |
3386 | /* 64-bit */ | |
3387 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 3388 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 3389 | ustconsumer64_data.pid == 0 && |
2bdd86d4 | 3390 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3391 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3392 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3393 | if (ret < 0) { |
7753dea8 MD |
3394 | ret = LTTCOMM_UST_CONSUMER64_FAIL; |
3395 | ust_consumerd64_fd = -EINVAL; | |
2bdd86d4 MD |
3396 | goto error; |
3397 | } | |
48842b30 | 3398 | |
7753dea8 | 3399 | ust_consumerd64_fd = ustconsumer64_data.cmd_sock; |
3ff2ecac | 3400 | } else { |
7753dea8 MD |
3401 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3402 | } | |
3403 | /* 32-bit */ | |
fc7a59ce | 3404 | if (consumerd32_bin[0] != '\0' && |
7753dea8 MD |
3405 | ustconsumer32_data.pid == 0 && |
3406 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { | |
3407 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
3408 | ret = start_consumerd(&ustconsumer32_data); | |
3409 | if (ret < 0) { | |
3410 | ret = LTTCOMM_UST_CONSUMER32_FAIL; | |
3411 | ust_consumerd32_fd = -EINVAL; | |
3412 | goto error; | |
3413 | } | |
3414 | ust_consumerd32_fd = ustconsumer32_data.cmd_sock; | |
3415 | } else { | |
3416 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3417 | } |
44d3bd01 DG |
3418 | } |
3419 | break; | |
48842b30 | 3420 | } |
54d01ffb | 3421 | default: |
54d01ffb DG |
3422 | break; |
3423 | } | |
2e09ba09 | 3424 | skip_domain: |
33a2b854 | 3425 | |
8e0af1b4 MD |
3426 | /* |
3427 | * Check that the UID or GID match that of the tracing session. | |
3428 | * The root user can interact with all sessions. | |
3429 | */ | |
3430 | if (need_tracing_session) { | |
3431 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3432 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3433 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
8e0af1b4 MD |
3434 | ret = LTTCOMM_EPERM; |
3435 | goto error; | |
3436 | } | |
3437 | } | |
3438 | ||
54d01ffb DG |
3439 | /* Process by command type */ |
3440 | switch (cmd_ctx->lsm->cmd_type) { | |
3441 | case LTTNG_ADD_CONTEXT: | |
3442 | { | |
3443 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3444 | cmd_ctx->lsm->u.context.channel_name, | |
3445 | cmd_ctx->lsm->u.context.event_name, | |
3446 | &cmd_ctx->lsm->u.context.ctx); | |
3447 | break; | |
3448 | } | |
3449 | case LTTNG_DISABLE_CHANNEL: | |
3450 | { | |
3451 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3452 | cmd_ctx->lsm->u.disable.channel_name); | |
3453 | break; | |
3454 | } | |
3455 | case LTTNG_DISABLE_EVENT: | |
3456 | { | |
3457 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3458 | cmd_ctx->lsm->u.disable.channel_name, | |
3459 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
3460 | break; |
3461 | } | |
54d01ffb DG |
3462 | case LTTNG_DISABLE_ALL_EVENT: |
3463 | { | |
2bdd86d4 | 3464 | DBG("Disabling all events"); |
54d01ffb DG |
3465 | |
3466 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3467 | cmd_ctx->lsm->u.disable.channel_name); | |
3468 | break; | |
3469 | } | |
3470 | case LTTNG_ENABLE_CHANNEL: | |
3471 | { | |
aea829b3 | 3472 | ret = cmd_enable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
54d01ffb DG |
3473 | &cmd_ctx->lsm->u.channel.chan); |
3474 | break; | |
3475 | } | |
3476 | case LTTNG_ENABLE_EVENT: | |
3477 | { | |
3478 | ret = cmd_enable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3479 | cmd_ctx->lsm->u.enable.channel_name, | |
3480 | &cmd_ctx->lsm->u.enable.event); | |
3481 | break; | |
3482 | } | |
3483 | case LTTNG_ENABLE_ALL_EVENT: | |
3484 | { | |
2bdd86d4 | 3485 | DBG("Enabling all events"); |
54d01ffb DG |
3486 | |
3487 | ret = cmd_enable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
8c9ae521 DG |
3488 | cmd_ctx->lsm->u.enable.channel_name, |
3489 | cmd_ctx->lsm->u.enable.event.type); | |
54d01ffb DG |
3490 | break; |
3491 | } | |
052da939 | 3492 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3493 | { |
9f19cc17 | 3494 | struct lttng_event *events; |
54d01ffb | 3495 | ssize_t nb_events; |
052da939 | 3496 | |
54d01ffb DG |
3497 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
3498 | if (nb_events < 0) { | |
3499 | ret = -nb_events; | |
3500 | goto error; | |
2ef84c95 DG |
3501 | } |
3502 | ||
3503 | /* | |
3504 | * Setup lttng message with payload size set to the event list size in | |
3505 | * bytes and then copy list into the llm payload. | |
3506 | */ | |
052da939 | 3507 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3508 | if (ret < 0) { |
052da939 | 3509 | free(events); |
2ef84c95 DG |
3510 | goto setup_error; |
3511 | } | |
3512 | ||
3513 | /* Copy event list into message payload */ | |
9f19cc17 | 3514 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3515 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3516 | |
9f19cc17 | 3517 | free(events); |
2ef84c95 DG |
3518 | |
3519 | ret = LTTCOMM_OK; | |
3520 | break; | |
3521 | } | |
f3ed775e | 3522 | case LTTNG_START_TRACE: |
8c0faa1d | 3523 | { |
54d01ffb | 3524 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3525 | break; |
3526 | } | |
f3ed775e | 3527 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3528 | { |
54d01ffb | 3529 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3530 | break; |
3531 | } | |
5e16da05 MD |
3532 | case LTTNG_CREATE_SESSION: |
3533 | { | |
54d01ffb | 3534 | ret = cmd_create_session(cmd_ctx->lsm->session.name, |
6df2e2c9 | 3535 | cmd_ctx->lsm->session.path, &cmd_ctx->creds); |
5e16da05 MD |
3536 | break; |
3537 | } | |
3538 | case LTTNG_DESTROY_SESSION: | |
3539 | { | |
54d01ffb DG |
3540 | ret = cmd_destroy_session(cmd_ctx->session, |
3541 | cmd_ctx->lsm->session.name); | |
5461b305 | 3542 | break; |
5e16da05 | 3543 | } |
9f19cc17 | 3544 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3545 | { |
54d01ffb DG |
3546 | ssize_t nb_dom; |
3547 | struct lttng_domain *domains; | |
5461b305 | 3548 | |
54d01ffb DG |
3549 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3550 | if (nb_dom < 0) { | |
3551 | ret = -nb_dom; | |
3552 | goto error; | |
ce3d728c | 3553 | } |
520ff687 | 3554 | |
54d01ffb | 3555 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 DG |
3556 | if (ret < 0) { |
3557 | goto setup_error; | |
520ff687 | 3558 | } |
57167058 | 3559 | |
54d01ffb DG |
3560 | /* Copy event list into message payload */ |
3561 | memcpy(cmd_ctx->llm->payload, domains, | |
3562 | nb_dom * sizeof(struct lttng_domain)); | |
3563 | ||
3564 | free(domains); | |
5e16da05 | 3565 | |
5461b305 | 3566 | ret = LTTCOMM_OK; |
5e16da05 MD |
3567 | break; |
3568 | } | |
9f19cc17 | 3569 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3570 | { |
54d01ffb DG |
3571 | size_t nb_chan; |
3572 | struct lttng_channel *channels; | |
3573 | ||
b551a063 DG |
3574 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3575 | cmd_ctx->session, &channels); | |
54d01ffb DG |
3576 | if (nb_chan < 0) { |
3577 | ret = -nb_chan; | |
3578 | goto error; | |
5461b305 | 3579 | } |
ca95a216 | 3580 | |
54d01ffb | 3581 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 DG |
3582 | if (ret < 0) { |
3583 | goto setup_error; | |
3584 | } | |
9f19cc17 | 3585 | |
54d01ffb DG |
3586 | /* Copy event list into message payload */ |
3587 | memcpy(cmd_ctx->llm->payload, channels, | |
3588 | nb_chan * sizeof(struct lttng_channel)); | |
3589 | ||
3590 | free(channels); | |
9f19cc17 DG |
3591 | |
3592 | ret = LTTCOMM_OK; | |
5461b305 | 3593 | break; |
5e16da05 | 3594 | } |
9f19cc17 | 3595 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3596 | { |
b551a063 | 3597 | ssize_t nb_event; |
684d34d2 | 3598 | struct lttng_event *events = NULL; |
9f19cc17 | 3599 | |
b551a063 | 3600 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3601 | cmd_ctx->lsm->u.list.channel_name, &events); |
3602 | if (nb_event < 0) { | |
3603 | ret = -nb_event; | |
3604 | goto error; | |
5461b305 | 3605 | } |
ca95a216 | 3606 | |
54d01ffb | 3607 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 DG |
3608 | if (ret < 0) { |
3609 | goto setup_error; | |
3610 | } | |
9f19cc17 | 3611 | |
54d01ffb DG |
3612 | /* Copy event list into message payload */ |
3613 | memcpy(cmd_ctx->llm->payload, events, | |
3614 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3615 | |
54d01ffb | 3616 | free(events); |
9f19cc17 DG |
3617 | |
3618 | ret = LTTCOMM_OK; | |
5461b305 | 3619 | break; |
5e16da05 MD |
3620 | } |
3621 | case LTTNG_LIST_SESSIONS: | |
3622 | { | |
8e0af1b4 | 3623 | unsigned int nr_sessions; |
5461b305 | 3624 | |
8e0af1b4 | 3625 | session_lock_list(); |
730389d9 DG |
3626 | nr_sessions = lttng_sessions_count( |
3627 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3628 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3629 | |
8e0af1b4 | 3630 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3631 | if (ret < 0) { |
54d01ffb | 3632 | session_unlock_list(); |
5461b305 | 3633 | goto setup_error; |
e065084a | 3634 | } |
5e16da05 | 3635 | |
6c9cc2ab | 3636 | /* Filled the session array */ |
8e0af1b4 | 3637 | list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3638 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3639 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3640 | |
54d01ffb | 3641 | session_unlock_list(); |
5e16da05 | 3642 | |
5461b305 | 3643 | ret = LTTCOMM_OK; |
5e16da05 MD |
3644 | break; |
3645 | } | |
d0254c7c MD |
3646 | case LTTNG_CALIBRATE: |
3647 | { | |
54d01ffb DG |
3648 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3649 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3650 | break; |
3651 | } | |
d9800920 DG |
3652 | case LTTNG_REGISTER_CONSUMER: |
3653 | { | |
54d01ffb DG |
3654 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3655 | cmd_ctx->lsm->u.reg.path); | |
d9800920 DG |
3656 | break; |
3657 | } | |
5e16da05 | 3658 | default: |
5e16da05 | 3659 | ret = LTTCOMM_UND; |
5461b305 | 3660 | break; |
fac6795d DG |
3661 | } |
3662 | ||
5461b305 | 3663 | error: |
5461b305 DG |
3664 | if (cmd_ctx->llm == NULL) { |
3665 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3666 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3667 | goto setup_error; |
3668 | } | |
3669 | } | |
54d01ffb | 3670 | /* Set return code */ |
5461b305 | 3671 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3672 | setup_error: |
b5541356 | 3673 | if (cmd_ctx->session) { |
54d01ffb | 3674 | session_unlock(cmd_ctx->session); |
b5541356 | 3675 | } |
54d01ffb | 3676 | init_setup_error: |
8028d920 | 3677 | return ret; |
fac6795d DG |
3678 | } |
3679 | ||
1d4b027a | 3680 | /* |
d063d709 DG |
3681 | * This thread manage all clients request using the unix client socket for |
3682 | * communication. | |
1d4b027a DG |
3683 | */ |
3684 | static void *thread_manage_clients(void *data) | |
3685 | { | |
a4b35e07 | 3686 | int sock = -1, ret, i, pollfd; |
5eb91c98 | 3687 | uint32_t revents, nb_fd; |
273ea72c | 3688 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3689 | struct lttng_poll_event events; |
1d4b027a DG |
3690 | |
3691 | DBG("[thread] Manage client started"); | |
3692 | ||
f6a9efaa DG |
3693 | rcu_register_thread(); |
3694 | ||
1d4b027a DG |
3695 | ret = lttcomm_listen_unix_sock(client_sock); |
3696 | if (ret < 0) { | |
3697 | goto error; | |
3698 | } | |
3699 | ||
5eb91c98 DG |
3700 | /* |
3701 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3702 | * more will be added to this poll set. | |
3703 | */ | |
3704 | ret = create_thread_poll_set(&events, 2); | |
3705 | if (ret < 0) { | |
3706 | goto error; | |
3707 | } | |
273ea72c | 3708 | |
5eb91c98 DG |
3709 | /* Add the application registration socket */ |
3710 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3711 | if (ret < 0) { | |
3712 | goto error; | |
3713 | } | |
273ea72c | 3714 | |
bbd973c2 DG |
3715 | /* |
3716 | * Notify parent pid that we are ready to accept command for client side. | |
1d4b027a DG |
3717 | */ |
3718 | if (opt_sig_parent) { | |
8db8d1dc | 3719 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3720 | } |
3721 | ||
3722 | while (1) { | |
1d4b027a | 3723 | DBG("Accepting client command ..."); |
273ea72c | 3724 | |
5eb91c98 DG |
3725 | nb_fd = LTTNG_POLL_GETNB(&events); |
3726 | ||
273ea72c | 3727 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 3728 | restart: |
5eb91c98 | 3729 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 3730 | if (ret < 0) { |
88f2b785 MD |
3731 | /* |
3732 | * Restart interrupted system call. | |
3733 | */ | |
3734 | if (errno == EINTR) { | |
3735 | goto restart; | |
3736 | } | |
273ea72c DG |
3737 | goto error; |
3738 | } | |
3739 | ||
5eb91c98 DG |
3740 | for (i = 0; i < nb_fd; i++) { |
3741 | /* Fetch once the poll data */ | |
3742 | revents = LTTNG_POLL_GETEV(&events, i); | |
3743 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3744 | ||
3745 | /* Thread quit pipe has been closed. Killing thread. */ | |
3746 | ret = check_thread_quit_pipe(pollfd, revents); | |
3747 | if (ret) { | |
3748 | goto error; | |
3749 | } | |
3750 | ||
3751 | /* Event on the registration socket */ | |
3752 | if (pollfd == client_sock) { | |
3753 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3754 | ERR("Client socket poll error"); | |
3755 | goto error; | |
3756 | } | |
3757 | } | |
3758 | } | |
3759 | ||
3760 | DBG("Wait for client response"); | |
3761 | ||
3762 | sock = lttcomm_accept_unix_sock(client_sock); | |
3763 | if (sock < 0) { | |
273ea72c | 3764 | goto error; |
273ea72c DG |
3765 | } |
3766 | ||
be040666 DG |
3767 | /* Set socket option for credentials retrieval */ |
3768 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3769 | if (ret < 0) { | |
3770 | goto error; | |
3771 | } | |
3772 | ||
5eb91c98 | 3773 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3774 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3775 | if (cmd_ctx == NULL) { |
76d7553f | 3776 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 3777 | goto error; |
5eb91c98 | 3778 | } |
1d4b027a | 3779 | |
5eb91c98 | 3780 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3781 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3782 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 3783 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3784 | goto error; |
3785 | } | |
1d4b027a | 3786 | |
5eb91c98 DG |
3787 | cmd_ctx->llm = NULL; |
3788 | cmd_ctx->session = NULL; | |
1d4b027a | 3789 | |
5eb91c98 DG |
3790 | /* |
3791 | * Data is received from the lttng client. The struct | |
3792 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3793 | * the client. | |
3794 | */ | |
3795 | DBG("Receiving data from client ..."); | |
be040666 DG |
3796 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3797 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3798 | if (ret <= 0) { |
3799 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
3800 | ret = close(sock); |
3801 | if (ret) { | |
3802 | PERROR("close"); | |
3803 | } | |
3804 | sock = -1; | |
5eb91c98 DG |
3805 | free(cmd_ctx); |
3806 | continue; | |
3807 | } | |
1d4b027a | 3808 | |
5eb91c98 DG |
3809 | // TODO: Validate cmd_ctx including sanity check for |
3810 | // security purpose. | |
f7776ea7 | 3811 | |
f6a9efaa | 3812 | rcu_thread_online(); |
5eb91c98 DG |
3813 | /* |
3814 | * This function dispatch the work to the kernel or userspace tracer | |
3815 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3816 | * informations for the client. The command context struct contains | |
3817 | * everything this function may needs. | |
3818 | */ | |
3819 | ret = process_client_msg(cmd_ctx); | |
f6a9efaa | 3820 | rcu_thread_offline(); |
5eb91c98 | 3821 | if (ret < 0) { |
bbd973c2 | 3822 | /* |
5eb91c98 | 3823 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3824 | * this point, ret < 0 means that a zmalloc failed |
5eb91c98 | 3825 | * (ENOMEM). Error detected but still accept command. |
bbd973c2 | 3826 | */ |
bbd973c2 | 3827 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3828 | continue; |
3829 | } | |
d6e4fca4 | 3830 | |
54d01ffb DG |
3831 | DBG("Sending response (size: %d, retcode: %s)", |
3832 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3833 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3834 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3835 | if (ret < 0) { |
3836 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3837 | } |
1d4b027a | 3838 | |
5eb91c98 | 3839 | /* End of transmission */ |
76d7553f MD |
3840 | ret = close(sock); |
3841 | if (ret) { | |
3842 | PERROR("close"); | |
3843 | } | |
3844 | sock = -1; | |
be040666 DG |
3845 | |
3846 | clean_command_ctx(&cmd_ctx); | |
273ea72c DG |
3847 | } |
3848 | ||
5eb91c98 DG |
3849 | error: |
3850 | DBG("Client thread dying"); | |
273ea72c | 3851 | unlink(client_unix_sock_path); |
76d7553f MD |
3852 | if (client_sock >= 0) { |
3853 | ret = close(client_sock); | |
3854 | if (ret) { | |
3855 | PERROR("close"); | |
3856 | } | |
a4b35e07 MD |
3857 | } |
3858 | if (sock >= 0) { | |
76d7553f MD |
3859 | ret = close(sock); |
3860 | if (ret) { | |
3861 | PERROR("close"); | |
3862 | } | |
a4b35e07 | 3863 | } |
273ea72c | 3864 | |
5eb91c98 | 3865 | lttng_poll_clean(&events); |
a2fb29a5 | 3866 | clean_command_ctx(&cmd_ctx); |
f6a9efaa DG |
3867 | |
3868 | rcu_unregister_thread(); | |
1d4b027a DG |
3869 | return NULL; |
3870 | } | |
3871 | ||
3872 | ||
fac6795d DG |
3873 | /* |
3874 | * usage function on stderr | |
3875 | */ | |
3876 | static void usage(void) | |
3877 | { | |
b716ce68 | 3878 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
3879 | fprintf(stderr, " -h, --help Display this usage.\n"); |
3880 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
3881 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
3882 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
3883 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
3884 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
3885 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
3886 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
3887 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
3888 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
3889 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
3890 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
3891 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
3892 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
3893 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
3894 | fprintf(stderr, " -V, --version Show version number.\n"); | |
3895 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
3896 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
3897 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
3bd1e081 | 3898 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 3899 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
fac6795d DG |
3900 | } |
3901 | ||
3902 | /* | |
3903 | * daemon argument parsing | |
3904 | */ | |
3905 | static int parse_args(int argc, char **argv) | |
3906 | { | |
3907 | int c; | |
3908 | ||
3909 | static struct option long_options[] = { | |
3910 | { "client-sock", 1, 0, 'c' }, | |
3911 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
3912 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
3913 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
7753dea8 MD |
3914 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, |
3915 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
ebaeda94 MD |
3916 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, |
3917 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
3918 | { "consumerd32-path", 1, 0, 'u' }, | |
3919 | { "consumerd32-libdir", 1, 0, 'U' }, | |
3920 | { "consumerd64-path", 1, 0, 't' }, | |
3921 | { "consumerd64-libdir", 1, 0, 'T' }, | |
fac6795d | 3922 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 3923 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
3924 | { "help", 0, 0, 'h' }, |
3925 | { "group", 1, 0, 'g' }, | |
3926 | { "version", 0, 0, 'V' }, | |
75462a81 | 3927 | { "quiet", 0, 0, 'q' }, |
3f9947db | 3928 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 3929 | { "verbose-consumer", 0, 0, 'Z' }, |
4fba7219 | 3930 | { "no-kernel", 0, 0, 'N' }, |
fac6795d DG |
3931 | { NULL, 0, 0, 0 } |
3932 | }; | |
3933 | ||
3934 | while (1) { | |
3935 | int option_index = 0; | |
4fba7219 | 3936 | c = getopt_long(argc, argv, "dhqvVSN" "a:c:g:s:C:E:D:F:Z:u:t", |
54d01ffb | 3937 | long_options, &option_index); |
fac6795d DG |
3938 | if (c == -1) { |
3939 | break; | |
3940 | } | |
3941 | ||
3942 | switch (c) { | |
3943 | case 0: | |
3944 | fprintf(stderr, "option %s", long_options[option_index].name); | |
3945 | if (optarg) { | |
3946 | fprintf(stderr, " with arg %s\n", optarg); | |
3947 | } | |
3948 | break; | |
b716ce68 | 3949 | case 'c': |
fac6795d DG |
3950 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
3951 | break; | |
3952 | case 'a': | |
3953 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
3954 | break; | |
3955 | case 'd': | |
3956 | opt_daemon = 1; | |
3957 | break; | |
3958 | case 'g': | |
fb09408a | 3959 | opt_tracing_group = optarg; |
fac6795d DG |
3960 | break; |
3961 | case 'h': | |
3962 | usage(); | |
3963 | exit(EXIT_FAILURE); | |
3964 | case 'V': | |
3965 | fprintf(stdout, "%s\n", VERSION); | |
3966 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
3967 | case 'S': |
3968 | opt_sig_parent = 1; | |
3969 | break; | |
d6f42150 | 3970 | case 'E': |
3bd1e081 | 3971 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
3972 | break; |
3973 | case 'C': | |
3bd1e081 MD |
3974 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3975 | break; | |
3976 | case 'F': | |
7753dea8 | 3977 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
3bd1e081 MD |
3978 | break; |
3979 | case 'D': | |
7753dea8 MD |
3980 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3981 | break; | |
3982 | case 'H': | |
3983 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
3984 | break; | |
3985 | case 'G': | |
3986 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 3987 | break; |
4fba7219 DG |
3988 | case 'N': |
3989 | opt_no_kernel = 1; | |
3990 | break; | |
75462a81 DG |
3991 | case 'q': |
3992 | opt_quiet = 1; | |
3993 | break; | |
3f9947db | 3994 | case 'v': |
53086306 DG |
3995 | /* Verbose level can increase using multiple -v */ |
3996 | opt_verbose += 1; | |
3f9947db | 3997 | break; |
31f73cc9 | 3998 | case 'Z': |
3bd1e081 | 3999 | opt_verbose_consumer += 1; |
31f73cc9 | 4000 | break; |
fb09408a | 4001 | case 'u': |
fc7a59ce | 4002 | consumerd32_bin= optarg; |
ebaeda94 MD |
4003 | break; |
4004 | case 'U': | |
4005 | consumerd32_libdir = optarg; | |
7753dea8 MD |
4006 | break; |
4007 | case 't': | |
fc7a59ce | 4008 | consumerd64_bin = optarg; |
ebaeda94 MD |
4009 | break; |
4010 | case 'T': | |
4011 | consumerd64_libdir = optarg; | |
fb09408a | 4012 | break; |
fac6795d DG |
4013 | default: |
4014 | /* Unknown option or other error. | |
4015 | * Error is printed by getopt, just return */ | |
4016 | return -1; | |
4017 | } | |
4018 | } | |
4019 | ||
4020 | return 0; | |
4021 | } | |
4022 | ||
4023 | /* | |
d063d709 | 4024 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
4025 | * apps_sock - The communication socket for all UST apps. |
4026 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 4027 | */ |
cf3af59e | 4028 | static int init_daemon_socket(void) |
fac6795d DG |
4029 | { |
4030 | int ret = 0; | |
4031 | mode_t old_umask; | |
4032 | ||
4033 | old_umask = umask(0); | |
4034 | ||
4035 | /* Create client tool unix socket */ | |
d6f42150 DG |
4036 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
4037 | if (client_sock < 0) { | |
4038 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
4039 | ret = -1; |
4040 | goto end; | |
4041 | } | |
4042 | ||
4043 | /* File permission MUST be 660 */ | |
4044 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4045 | if (ret < 0) { | |
d6f42150 | 4046 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 4047 | PERROR("chmod"); |
fac6795d DG |
4048 | goto end; |
4049 | } | |
4050 | ||
4051 | /* Create the application unix socket */ | |
d6f42150 DG |
4052 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
4053 | if (apps_sock < 0) { | |
4054 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
4055 | ret = -1; |
4056 | goto end; | |
4057 | } | |
4058 | ||
d6f42150 | 4059 | /* File permission MUST be 666 */ |
54d01ffb DG |
4060 | ret = chmod(apps_unix_sock_path, |
4061 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 4062 | if (ret < 0) { |
d6f42150 | 4063 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 4064 | PERROR("chmod"); |
fac6795d DG |
4065 | goto end; |
4066 | } | |
4067 | ||
4068 | end: | |
4069 | umask(old_umask); | |
4070 | return ret; | |
4071 | } | |
4072 | ||
4073 | /* | |
54d01ffb DG |
4074 | * Check if the global socket is available, and if a daemon is answering at the |
4075 | * other side. If yes, error is returned. | |
fac6795d | 4076 | */ |
cf3af59e | 4077 | static int check_existing_daemon(void) |
fac6795d | 4078 | { |
7d8234d9 | 4079 | /* Is there anybody out there ? */ |
099e26bd | 4080 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 4081 | return -EEXIST; |
099e26bd | 4082 | } |
b09c7c76 DG |
4083 | |
4084 | return 0; | |
fac6795d DG |
4085 | } |
4086 | ||
fac6795d | 4087 | /* |
d063d709 | 4088 | * Set the tracing group gid onto the client socket. |
5e16da05 | 4089 | * |
d063d709 | 4090 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 4091 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 4092 | */ |
be040666 | 4093 | static int set_permissions(char *rundir) |
fac6795d DG |
4094 | { |
4095 | int ret; | |
996b65c8 | 4096 | gid_t gid; |
fac6795d | 4097 | |
996b65c8 MD |
4098 | gid = allowed_group(); |
4099 | if (gid < 0) { | |
be040666 DG |
4100 | WARN("No tracing group detected"); |
4101 | ret = 0; | |
fac6795d DG |
4102 | goto end; |
4103 | } | |
4104 | ||
d6f42150 | 4105 | /* Set lttng run dir */ |
be040666 | 4106 | ret = chown(rundir, 0, gid); |
d6f42150 | 4107 | if (ret < 0) { |
be040666 | 4108 | ERR("Unable to set group on %s", rundir); |
76d7553f | 4109 | PERROR("chown"); |
d6f42150 DG |
4110 | } |
4111 | ||
d1613cf5 | 4112 | /* Ensure tracing group can search the run dir */ |
61076f74 | 4113 | ret = chmod(rundir, S_IRWXU | S_IXGRP | S_IXOTH); |
d1613cf5 JN |
4114 | if (ret < 0) { |
4115 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 4116 | PERROR("chmod"); |
d1613cf5 JN |
4117 | } |
4118 | ||
d6f42150 | 4119 | /* lttng client socket path */ |
996b65c8 | 4120 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 4121 | if (ret < 0) { |
d6f42150 | 4122 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 4123 | PERROR("chown"); |
d6f42150 DG |
4124 | } |
4125 | ||
3bd1e081 MD |
4126 | /* kconsumer error socket path */ |
4127 | ret = chown(kconsumer_data.err_unix_sock_path, 0, gid); | |
d6f42150 | 4128 | if (ret < 0) { |
3bd1e081 | 4129 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 4130 | PERROR("chown"); |
3bd1e081 MD |
4131 | } |
4132 | ||
7753dea8 MD |
4133 | /* 64-bit ustconsumer error socket path */ |
4134 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, gid); | |
4135 | if (ret < 0) { | |
4136 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 4137 | PERROR("chown"); |
7753dea8 MD |
4138 | } |
4139 | ||
4140 | /* 32-bit ustconsumer compat32 error socket path */ | |
4141 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, gid); | |
3bd1e081 | 4142 | if (ret < 0) { |
7753dea8 | 4143 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 4144 | PERROR("chown"); |
fac6795d DG |
4145 | } |
4146 | ||
d6f42150 | 4147 | DBG("All permissions are set"); |
e07ae692 | 4148 | |
fac6795d DG |
4149 | end: |
4150 | return ret; | |
4151 | } | |
4152 | ||
7a485870 | 4153 | /* |
d063d709 | 4154 | * Create the pipe used to wake up the kernel thread. |
76d7553f | 4155 | * Closed in cleanup(). |
7a485870 DG |
4156 | */ |
4157 | static int create_kernel_poll_pipe(void) | |
4158 | { | |
730389d9 DG |
4159 | int ret, i; |
4160 | ||
4161 | ret = pipe(kernel_poll_pipe); | |
4162 | if (ret < 0) { | |
4163 | PERROR("kernel poll pipe"); | |
4164 | goto error; | |
4165 | } | |
4166 | ||
4167 | for (i = 0; i < 2; i++) { | |
4168 | ret = fcntl(kernel_poll_pipe[i], F_SETFD, FD_CLOEXEC); | |
4169 | if (ret < 0) { | |
4170 | PERROR("fcntl kernel_poll_pipe"); | |
4171 | goto error; | |
4172 | } | |
4173 | } | |
4174 | ||
4175 | error: | |
4176 | return ret; | |
7a485870 DG |
4177 | } |
4178 | ||
099e26bd DG |
4179 | /* |
4180 | * Create the application command pipe to wake thread_manage_apps. | |
76d7553f | 4181 | * Closed in cleanup(). |
099e26bd DG |
4182 | */ |
4183 | static int create_apps_cmd_pipe(void) | |
4184 | { | |
730389d9 DG |
4185 | int ret, i; |
4186 | ||
4187 | ret = pipe(apps_cmd_pipe); | |
4188 | if (ret < 0) { | |
4189 | PERROR("apps cmd pipe"); | |
4190 | goto error; | |
4191 | } | |
4192 | ||
4193 | for (i = 0; i < 2; i++) { | |
4194 | ret = fcntl(apps_cmd_pipe[i], F_SETFD, FD_CLOEXEC); | |
4195 | if (ret < 0) { | |
4196 | PERROR("fcntl apps_cmd_pipe"); | |
4197 | goto error; | |
4198 | } | |
4199 | } | |
4200 | ||
4201 | error: | |
4202 | return ret; | |
099e26bd DG |
4203 | } |
4204 | ||
d6f42150 | 4205 | /* |
d063d709 | 4206 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 4207 | */ |
67e40797 | 4208 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
4209 | { |
4210 | int ret; | |
4211 | ||
67e40797 DG |
4212 | DBG3("Creating LTTng run directory: %s", rundir); |
4213 | ||
d1613cf5 | 4214 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 4215 | if (ret < 0) { |
b1f11e69 | 4216 | if (errno != EEXIST) { |
67e40797 | 4217 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
4218 | goto error; |
4219 | } else { | |
4220 | ret = 0; | |
4221 | } | |
d6f42150 DG |
4222 | } |
4223 | ||
4224 | error: | |
4225 | return ret; | |
4226 | } | |
4227 | ||
4228 | /* | |
d063d709 DG |
4229 | * Setup sockets and directory needed by the kconsumerd communication with the |
4230 | * session daemon. | |
d6f42150 | 4231 | */ |
67e40797 DG |
4232 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
4233 | const char *rundir) | |
d6f42150 DG |
4234 | { |
4235 | int ret; | |
67e40797 | 4236 | char path[PATH_MAX]; |
d6f42150 | 4237 | |
67e40797 | 4238 | switch (consumer_data->type) { |
7753dea8 | 4239 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 4240 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
4241 | break; |
4242 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 4243 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
4244 | break; |
4245 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 4246 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
4247 | break; |
4248 | default: | |
4249 | ERR("Consumer type unknown"); | |
4250 | ret = -EINVAL; | |
4251 | goto error; | |
d6f42150 DG |
4252 | } |
4253 | ||
67e40797 DG |
4254 | DBG2("Creating consumer directory: %s", path); |
4255 | ||
d1613cf5 | 4256 | ret = mkdir(path, S_IRWXU); |
d6f42150 | 4257 | if (ret < 0) { |
6beb2242 | 4258 | if (errno != EEXIST) { |
3bd1e081 | 4259 | ERR("Failed to create %s", path); |
6beb2242 DG |
4260 | goto error; |
4261 | } | |
4262 | ret = 0; | |
d6f42150 DG |
4263 | } |
4264 | ||
4265 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
4266 | consumer_data->err_sock = |
4267 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
4268 | if (consumer_data->err_sock < 0) { | |
4269 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
4270 | ret = -1; |
4271 | goto error; | |
4272 | } | |
4273 | ||
4274 | /* File permission MUST be 660 */ | |
3bd1e081 | 4275 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 4276 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 4277 | if (ret < 0) { |
3bd1e081 | 4278 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 4279 | PERROR("chmod"); |
d6f42150 DG |
4280 | goto error; |
4281 | } | |
4282 | ||
4283 | error: | |
4284 | return ret; | |
4285 | } | |
4286 | ||
fac6795d | 4287 | /* |
d063d709 | 4288 | * Signal handler for the daemon |
cf3af59e | 4289 | * |
54d01ffb DG |
4290 | * Simply stop all worker threads, leaving main() return gracefully after |
4291 | * joining all threads and calling cleanup(). | |
fac6795d DG |
4292 | */ |
4293 | static void sighandler(int sig) | |
4294 | { | |
4295 | switch (sig) { | |
cf3af59e | 4296 | case SIGPIPE: |
af87c45a | 4297 | DBG("SIGPIPE caught"); |
cf3af59e MD |
4298 | return; |
4299 | case SIGINT: | |
af87c45a | 4300 | DBG("SIGINT caught"); |
cf3af59e MD |
4301 | stop_threads(); |
4302 | break; | |
4303 | case SIGTERM: | |
af87c45a | 4304 | DBG("SIGTERM caught"); |
cf3af59e MD |
4305 | stop_threads(); |
4306 | break; | |
4307 | default: | |
4308 | break; | |
fac6795d | 4309 | } |
fac6795d DG |
4310 | } |
4311 | ||
4312 | /* | |
d063d709 | 4313 | * Setup signal handler for : |
1d4b027a | 4314 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 4315 | */ |
1d4b027a | 4316 | static int set_signal_handler(void) |
fac6795d | 4317 | { |
1d4b027a DG |
4318 | int ret = 0; |
4319 | struct sigaction sa; | |
4320 | sigset_t sigset; | |
fac6795d | 4321 | |
1d4b027a | 4322 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 4323 | PERROR("sigemptyset"); |
1d4b027a DG |
4324 | return ret; |
4325 | } | |
d6f42150 | 4326 | |
1d4b027a DG |
4327 | sa.sa_handler = sighandler; |
4328 | sa.sa_mask = sigset; | |
4329 | sa.sa_flags = 0; | |
4330 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 4331 | PERROR("sigaction"); |
1d4b027a | 4332 | return ret; |
d6f42150 DG |
4333 | } |
4334 | ||
1d4b027a | 4335 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 4336 | PERROR("sigaction"); |
1d4b027a | 4337 | return ret; |
d6f42150 | 4338 | } |
aaf26714 | 4339 | |
1d4b027a | 4340 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 4341 | PERROR("sigaction"); |
1d4b027a | 4342 | return ret; |
8c0faa1d DG |
4343 | } |
4344 | ||
1d4b027a DG |
4345 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
4346 | ||
4347 | return ret; | |
fac6795d DG |
4348 | } |
4349 | ||
f3ed775e | 4350 | /* |
d063d709 DG |
4351 | * Set open files limit to unlimited. This daemon can open a large number of |
4352 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
4353 | */ |
4354 | static void set_ulimit(void) | |
4355 | { | |
4356 | int ret; | |
4357 | struct rlimit lim; | |
4358 | ||
a88df331 | 4359 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
4360 | lim.rlim_cur = 65535; |
4361 | lim.rlim_max = 65535; | |
4362 | ||
4363 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
4364 | if (ret < 0) { | |
76d7553f | 4365 | PERROR("failed to set open files limit"); |
f3ed775e DG |
4366 | } |
4367 | } | |
4368 | ||
fac6795d DG |
4369 | /* |
4370 | * main | |
4371 | */ | |
4372 | int main(int argc, char **argv) | |
4373 | { | |
fac6795d DG |
4374 | int ret = 0; |
4375 | void *status; | |
b082db07 | 4376 | const char *home_path; |
fac6795d | 4377 | |
335a95b7 MD |
4378 | init_kernel_workarounds(); |
4379 | ||
f6a9efaa DG |
4380 | rcu_register_thread(); |
4381 | ||
273ea72c | 4382 | /* Create thread quit pipe */ |
cf3af59e MD |
4383 | if ((ret = init_thread_quit_pipe()) < 0) { |
4384 | goto error; | |
273ea72c DG |
4385 | } |
4386 | ||
7753dea8 | 4387 | setup_consumerd_path(); |
fb09408a | 4388 | |
fac6795d DG |
4389 | /* Parse arguments */ |
4390 | progname = argv[0]; | |
4391 | if ((ret = parse_args(argc, argv) < 0)) { | |
cf3af59e | 4392 | goto error; |
fac6795d DG |
4393 | } |
4394 | ||
4395 | /* Daemonize */ | |
4396 | if (opt_daemon) { | |
53094c05 DG |
4397 | ret = daemon(0, 0); |
4398 | if (ret < 0) { | |
76d7553f | 4399 | PERROR("daemon"); |
cf3af59e | 4400 | goto error; |
53094c05 | 4401 | } |
fac6795d DG |
4402 | } |
4403 | ||
4404 | /* Check if daemon is UID = 0 */ | |
4405 | is_root = !getuid(); | |
4406 | ||
fac6795d | 4407 | if (is_root) { |
990570ed | 4408 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
4409 | |
4410 | /* Create global run dir with root access */ | |
4411 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 4412 | if (ret < 0) { |
cf3af59e | 4413 | goto error; |
d6f42150 DG |
4414 | } |
4415 | ||
fac6795d | 4416 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
4417 | snprintf(apps_unix_sock_path, PATH_MAX, |
4418 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
4419 | } |
4420 | ||
4421 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
4422 | snprintf(client_unix_sock_path, PATH_MAX, |
4423 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
4424 | } | |
0fdd1e2c DG |
4425 | |
4426 | /* Set global SHM for ust */ | |
4427 | if (strlen(wait_shm_path) == 0) { | |
4428 | snprintf(wait_shm_path, PATH_MAX, | |
4429 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
4430 | } | |
67e40797 DG |
4431 | |
4432 | /* Setup kernel consumerd path */ | |
4433 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4434 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 4435 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4436 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4437 | |
4438 | DBG2("Kernel consumer err path: %s", | |
4439 | kconsumer_data.err_unix_sock_path); | |
4440 | DBG2("Kernel consumer cmd path: %s", | |
4441 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 4442 | } else { |
b082db07 DG |
4443 | home_path = get_home_dir(); |
4444 | if (home_path == NULL) { | |
273ea72c DG |
4445 | /* TODO: Add --socket PATH option */ |
4446 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
4447 | ret = -EPERM; |
4448 | goto error; | |
b082db07 DG |
4449 | } |
4450 | ||
67e40797 DG |
4451 | /* |
4452 | * Create rundir from home path. This will create something like | |
4453 | * $HOME/.lttng | |
4454 | */ | |
990570ed | 4455 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
4456 | if (ret < 0) { |
4457 | ret = -ENOMEM; | |
4458 | goto error; | |
4459 | } | |
4460 | ||
4461 | ret = create_lttng_rundir(rundir); | |
4462 | if (ret < 0) { | |
4463 | goto error; | |
4464 | } | |
4465 | ||
fac6795d | 4466 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 4467 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 4468 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
4469 | } |
4470 | ||
4471 | /* Set the cli tool unix socket path */ | |
4472 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 4473 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 4474 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 4475 | } |
0fdd1e2c DG |
4476 | |
4477 | /* Set global SHM for ust */ | |
4478 | if (strlen(wait_shm_path) == 0) { | |
4479 | snprintf(wait_shm_path, PATH_MAX, | |
4480 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, geteuid()); | |
4481 | } | |
fac6795d DG |
4482 | } |
4483 | ||
847177cd DG |
4484 | DBG("Client socket path %s", client_unix_sock_path); |
4485 | DBG("Application socket path %s", apps_unix_sock_path); | |
67e40797 DG |
4486 | DBG("LTTng run directory path: %s", rundir); |
4487 | ||
4488 | /* 32 bits consumerd path setup */ | |
4489 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4490 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 4491 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4492 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4493 | |
4494 | DBG2("UST consumer 32 bits err path: %s", | |
4495 | ustconsumer32_data.err_unix_sock_path); | |
4496 | DBG2("UST consumer 32 bits cmd path: %s", | |
4497 | ustconsumer32_data.cmd_unix_sock_path); | |
4498 | ||
4499 | /* 64 bits consumerd path setup */ | |
4500 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4501 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 4502 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4503 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4504 | |
4505 | DBG2("UST consumer 64 bits err path: %s", | |
4506 | ustconsumer64_data.err_unix_sock_path); | |
4507 | DBG2("UST consumer 64 bits cmd path: %s", | |
4508 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 4509 | |
273ea72c | 4510 | /* |
7d8234d9 | 4511 | * See if daemon already exist. |
fac6795d | 4512 | */ |
7d8234d9 | 4513 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4514 | ERR("Already running daemon.\n"); |
273ea72c | 4515 | /* |
cf3af59e MD |
4516 | * We do not goto exit because we must not cleanup() |
4517 | * because a daemon is already running. | |
ab118b20 | 4518 | */ |
cf3af59e | 4519 | goto error; |
a88df331 DG |
4520 | } |
4521 | ||
54d01ffb | 4522 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4523 | |
4524 | /* | |
4525 | * These actions must be executed as root. We do that *after* setting up | |
4526 | * the sockets path because we MUST make the check for another daemon using | |
4527 | * those paths *before* trying to set the kernel consumer sockets and init | |
4528 | * kernel tracer. | |
4529 | */ | |
4530 | if (is_root) { | |
67e40797 | 4531 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4532 | if (ret < 0) { |
4533 | goto exit; | |
4534 | } | |
4535 | ||
a88df331 | 4536 | /* Setup kernel tracer */ |
4fba7219 DG |
4537 | if (!opt_no_kernel) { |
4538 | init_kernel_tracer(); | |
4539 | } | |
a88df331 DG |
4540 | |
4541 | /* Set ulimit for open files */ | |
4542 | set_ulimit(); | |
fac6795d DG |
4543 | } |
4544 | ||
67e40797 DG |
4545 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
4546 | if (ret < 0) { | |
4547 | goto exit; | |
4548 | } | |
4549 | ||
4550 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
4551 | if (ret < 0) { | |
4552 | goto exit; | |
4553 | } | |
4554 | ||
cf3af59e MD |
4555 | if ((ret = set_signal_handler()) < 0) { |
4556 | goto exit; | |
fac6795d DG |
4557 | } |
4558 | ||
d6f42150 | 4559 | /* Setup the needed unix socket */ |
cf3af59e MD |
4560 | if ((ret = init_daemon_socket()) < 0) { |
4561 | goto exit; | |
fac6795d DG |
4562 | } |
4563 | ||
4564 | /* Set credentials to socket */ | |
be040666 | 4565 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 4566 | goto exit; |
fac6795d DG |
4567 | } |
4568 | ||
5b8719f5 DG |
4569 | /* Get parent pid if -S, --sig-parent is specified. */ |
4570 | if (opt_sig_parent) { | |
4571 | ppid = getppid(); | |
4572 | } | |
4573 | ||
7a485870 | 4574 | /* Setup the kernel pipe for waking up the kernel thread */ |
cf3af59e MD |
4575 | if ((ret = create_kernel_poll_pipe()) < 0) { |
4576 | goto exit; | |
7a485870 DG |
4577 | } |
4578 | ||
099e26bd DG |
4579 | /* Setup the thread apps communication pipe. */ |
4580 | if ((ret = create_apps_cmd_pipe()) < 0) { | |
4581 | goto exit; | |
4582 | } | |
4583 | ||
4584 | /* Init UST command queue. */ | |
4585 | cds_wfq_init(&ust_cmd_queue.queue); | |
4586 | ||
f6a9efaa DG |
4587 | /* Init UST app hash table */ |
4588 | ust_app_ht_alloc(); | |
4589 | ||
273ea72c | 4590 | /* |
54d01ffb DG |
4591 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4592 | * statically declared in session.c | |
273ea72c | 4593 | */ |
54d01ffb | 4594 | session_list_ptr = session_get_list(); |
b5541356 | 4595 | |
5eb91c98 DG |
4596 | /* Set up max poll set size */ |
4597 | lttng_poll_set_max_size(); | |
4598 | ||
cf3af59e | 4599 | /* Create thread to manage the client socket */ |
099e26bd DG |
4600 | ret = pthread_create(&client_thread, NULL, |
4601 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 4602 | if (ret != 0) { |
76d7553f | 4603 | PERROR("pthread_create clients"); |
cf3af59e MD |
4604 | goto exit_client; |
4605 | } | |
fac6795d | 4606 | |
099e26bd DG |
4607 | /* Create thread to dispatch registration */ |
4608 | ret = pthread_create(&dispatch_thread, NULL, | |
4609 | thread_dispatch_ust_registration, (void *) NULL); | |
4610 | if (ret != 0) { | |
76d7553f | 4611 | PERROR("pthread_create dispatch"); |
099e26bd DG |
4612 | goto exit_dispatch; |
4613 | } | |
4614 | ||
4615 | /* Create thread to manage application registration. */ | |
4616 | ret = pthread_create(®_apps_thread, NULL, | |
4617 | thread_registration_apps, (void *) NULL); | |
4618 | if (ret != 0) { | |
76d7553f | 4619 | PERROR("pthread_create registration"); |
099e26bd DG |
4620 | goto exit_reg_apps; |
4621 | } | |
4622 | ||
cf3af59e | 4623 | /* Create thread to manage application socket */ |
54d01ffb DG |
4624 | ret = pthread_create(&apps_thread, NULL, |
4625 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 4626 | if (ret != 0) { |
76d7553f | 4627 | PERROR("pthread_create apps"); |
cf3af59e MD |
4628 | goto exit_apps; |
4629 | } | |
fac6795d | 4630 | |
cf3af59e | 4631 | /* Create kernel thread to manage kernel event */ |
54d01ffb DG |
4632 | ret = pthread_create(&kernel_thread, NULL, |
4633 | thread_manage_kernel, (void *) NULL); | |
cf3af59e | 4634 | if (ret != 0) { |
76d7553f | 4635 | PERROR("pthread_create kernel"); |
cf3af59e MD |
4636 | goto exit_kernel; |
4637 | } | |
7a485870 | 4638 | |
cf3af59e MD |
4639 | ret = pthread_join(kernel_thread, &status); |
4640 | if (ret != 0) { | |
76d7553f | 4641 | PERROR("pthread_join"); |
cf3af59e | 4642 | goto error; /* join error, exit without cleanup */ |
fac6795d DG |
4643 | } |
4644 | ||
cf3af59e MD |
4645 | exit_kernel: |
4646 | ret = pthread_join(apps_thread, &status); | |
4647 | if (ret != 0) { | |
76d7553f | 4648 | PERROR("pthread_join"); |
cf3af59e MD |
4649 | goto error; /* join error, exit without cleanup */ |
4650 | } | |
fac6795d | 4651 | |
cf3af59e | 4652 | exit_apps: |
099e26bd DG |
4653 | ret = pthread_join(reg_apps_thread, &status); |
4654 | if (ret != 0) { | |
76d7553f | 4655 | PERROR("pthread_join"); |
099e26bd DG |
4656 | goto error; /* join error, exit without cleanup */ |
4657 | } | |
4658 | ||
4659 | exit_reg_apps: | |
4660 | ret = pthread_join(dispatch_thread, &status); | |
4661 | if (ret != 0) { | |
76d7553f | 4662 | PERROR("pthread_join"); |
099e26bd DG |
4663 | goto error; /* join error, exit without cleanup */ |
4664 | } | |
4665 | ||
4666 | exit_dispatch: | |
cf3af59e MD |
4667 | ret = pthread_join(client_thread, &status); |
4668 | if (ret != 0) { | |
76d7553f | 4669 | PERROR("pthread_join"); |
cf3af59e MD |
4670 | goto error; /* join error, exit without cleanup */ |
4671 | } | |
4672 | ||
3bd1e081 | 4673 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 4674 | if (ret != 0) { |
76d7553f | 4675 | PERROR("join_consumer"); |
cf3af59e MD |
4676 | goto error; /* join error, exit without cleanup */ |
4677 | } | |
a88df331 | 4678 | |
cf3af59e | 4679 | exit_client: |
a88df331 | 4680 | exit: |
cf3af59e MD |
4681 | /* |
4682 | * cleanup() is called when no other thread is running. | |
4683 | */ | |
f6a9efaa | 4684 | rcu_thread_online(); |
cf3af59e | 4685 | cleanup(); |
f6a9efaa DG |
4686 | rcu_thread_offline(); |
4687 | rcu_unregister_thread(); | |
67e40797 | 4688 | if (!ret) { |
cf3af59e | 4689 | exit(EXIT_SUCCESS); |
67e40797 | 4690 | } |
cf3af59e | 4691 | error: |
5e16da05 | 4692 | exit(EXIT_FAILURE); |
fac6795d | 4693 | } |