Commit | Line | Data |
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826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
0fdd1e2c | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
26296c48 | 4 | * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 5 | * |
d14d33bf AM |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License, version 2 only, | |
8 | * as published by the Free Software Foundation. | |
91d76f53 | 9 | * |
d14d33bf AM |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
91d76f53 | 14 | * |
d14d33bf AM |
15 | * You should have received a copy of the GNU General Public License along |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
fac6795d DG |
18 | */ |
19 | ||
6c1c0768 | 20 | #define _LGPL_SOURCE |
fac6795d DG |
21 | #include <getopt.h> |
22 | #include <grp.h> | |
23 | #include <limits.h> | |
0bb7724a | 24 | #include <paths.h> |
fac6795d DG |
25 | #include <pthread.h> |
26 | #include <signal.h> | |
27 | #include <stdio.h> | |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
331744e3 | 30 | #include <inttypes.h> |
0fdd1e2c | 31 | #include <sys/mman.h> |
b73401da | 32 | #include <sys/mount.h> |
1e307fab | 33 | #include <sys/resource.h> |
fac6795d DG |
34 | #include <sys/socket.h> |
35 | #include <sys/stat.h> | |
36 | #include <sys/types.h> | |
0fdd1e2c | 37 | #include <sys/wait.h> |
5c827ce0 | 38 | #include <urcu/uatomic.h> |
fac6795d | 39 | #include <unistd.h> |
4f0b90ee | 40 | #include <ctype.h> |
fac6795d | 41 | |
990570ed | 42 | #include <common/common.h> |
d27c42b8 | 43 | #include <common/compat/socket.h> |
e8fa9fb0 | 44 | #include <common/compat/getenv.h> |
db758600 DG |
45 | #include <common/defaults.h> |
46 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 47 | #include <common/futex.h> |
00e2e675 | 48 | #include <common/relayd/relayd.h> |
81b86775 | 49 | #include <common/utils.h> |
3ccdf997 | 50 | #include <common/daemonize.h> |
f40ef1d5 | 51 | #include <common/config/session-config.h> |
dcabc190 FD |
52 | #include <common/dynamic-buffer.h> |
53 | #include <lttng/userspace-probe-internal.h> | |
76fcf151 | 54 | #include <lttng/event-internal.h> |
fac6795d | 55 | |
10a8a223 | 56 | #include "lttng-sessiond.h" |
7972aab2 | 57 | #include "buffer-registry.h" |
54d01ffb | 58 | #include "channel.h" |
2f77fc4b | 59 | #include "cmd.h" |
00e2e675 | 60 | #include "consumer.h" |
099e26bd | 61 | #include "context.h" |
54d01ffb | 62 | #include "event.h" |
4771f025 | 63 | #include "kernel.h" |
f1e16794 | 64 | #include "kernel-consumer.h" |
096102bd | 65 | #include "modprobe.h" |
0fdd1e2c | 66 | #include "shm.h" |
1e307fab | 67 | #include "ust-ctl.h" |
00e2e675 | 68 | #include "ust-consumer.h" |
8e68d1c8 | 69 | #include "utils.h" |
4063050c | 70 | #include "fd-limit.h" |
8782cc74 | 71 | #include "health-sessiond.h" |
8ac94142 | 72 | #include "testpoint.h" |
d0b96690 | 73 | #include "ust-thread.h" |
022d91ba | 74 | #include "agent-thread.h" |
fb198a11 | 75 | #include "save.h" |
ef367a93 | 76 | #include "load-session-thread.h" |
b3530820 JG |
77 | #include "notification-thread.h" |
78 | #include "notification-thread-commands.h" | |
db66e574 | 79 | #include "rotation-thread.h" |
0dbc2034 | 80 | #include "lttng-syscall.h" |
7c1d2758 | 81 | #include "agent.h" |
5e97de00 | 82 | #include "ht-cleanup.h" |
e6142f2e | 83 | #include "sessiond-config.h" |
d086f507 | 84 | #include "sessiond-timer.h" |
ebaeda94 | 85 | |
4fc83d94 PP |
86 | static const char *help_msg = |
87 | #ifdef LTTNG_EMBED_HELP | |
88 | #include <lttng-sessiond.8.h> | |
89 | #else | |
90 | NULL | |
91 | #endif | |
92 | ; | |
93 | ||
fac6795d | 94 | const char *progname; |
1d4b027a | 95 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
0bb7724a | 96 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ |
c9cb3e7d | 97 | static int lockfile_fd = -1; |
3bd1e081 | 98 | |
0bb7724a DG |
99 | /* Set to 1 when a SIGUSR1 signal is received. */ |
100 | static int recv_child_signal; | |
101 | ||
88076e89 JD |
102 | static struct lttng_kernel_tracer_version kernel_tracer_version; |
103 | static struct lttng_kernel_tracer_abi_version kernel_tracer_abi_version; | |
104 | ||
a23ec3a7 DG |
105 | /* |
106 | * Consumer daemon specific control data. Every value not initialized here is | |
107 | * set to 0 by the static definition. | |
108 | */ | |
3bd1e081 MD |
109 | static struct consumer_data kconsumer_data = { |
110 | .type = LTTNG_CONSUMER_KERNEL, | |
03550b58 MD |
111 | .err_sock = -1, |
112 | .cmd_sock = -1, | |
b3530820 | 113 | .channel_monitor_pipe = -1, |
62c43103 | 114 | .channel_rotate_pipe = -1, |
173af62f DG |
115 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
116 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
117 | .cond = PTHREAD_COND_INITIALIZER, |
118 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 119 | }; |
7753dea8 MD |
120 | static struct consumer_data ustconsumer64_data = { |
121 | .type = LTTNG_CONSUMER64_UST, | |
03550b58 MD |
122 | .err_sock = -1, |
123 | .cmd_sock = -1, | |
b3530820 | 124 | .channel_monitor_pipe = -1, |
62c43103 | 125 | .channel_rotate_pipe = -1, |
173af62f DG |
126 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
127 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
128 | .cond = PTHREAD_COND_INITIALIZER, |
129 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
130 | }; |
131 | static struct consumer_data ustconsumer32_data = { | |
132 | .type = LTTNG_CONSUMER32_UST, | |
03550b58 MD |
133 | .err_sock = -1, |
134 | .cmd_sock = -1, | |
b3530820 | 135 | .channel_monitor_pipe = -1, |
62c43103 | 136 | .channel_rotate_pipe = -1, |
173af62f DG |
137 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
138 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
139 | .cond = PTHREAD_COND_INITIALIZER, |
140 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
141 | }; |
142 | ||
26296c48 JG |
143 | /* Command line options */ |
144 | static const struct option long_options[] = { | |
0f5ea17c JG |
145 | { "client-sock", required_argument, 0, 'c' }, |
146 | { "apps-sock", required_argument, 0, 'a' }, | |
147 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
148 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
149 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
150 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
151 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
152 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
153 | { "consumerd32-path", required_argument, 0, '\0' }, | |
154 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
155 | { "consumerd64-path", required_argument, 0, '\0' }, | |
156 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
157 | { "daemonize", no_argument, 0, 'd' }, | |
158 | { "background", no_argument, 0, 'b' }, | |
159 | { "sig-parent", no_argument, 0, 'S' }, | |
160 | { "help", no_argument, 0, 'h' }, | |
161 | { "group", required_argument, 0, 'g' }, | |
162 | { "version", no_argument, 0, 'V' }, | |
163 | { "quiet", no_argument, 0, 'q' }, | |
164 | { "verbose", no_argument, 0, 'v' }, | |
165 | { "verbose-consumer", no_argument, 0, '\0' }, | |
166 | { "no-kernel", no_argument, 0, '\0' }, | |
167 | { "pidfile", required_argument, 0, 'p' }, | |
168 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
169 | { "config", required_argument, 0, 'f' }, | |
170 | { "load", required_argument, 0, 'l' }, | |
171 | { "kmod-probes", required_argument, 0, '\0' }, | |
172 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
26296c48 JG |
173 | { NULL, 0, 0, 0 } |
174 | }; | |
175 | ||
e6142f2e JG |
176 | struct sessiond_config config; |
177 | ||
26296c48 JG |
178 | /* Command line options to ignore from configuration file */ |
179 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
180 | ||
26c9d55e | 181 | /* Shared between threads */ |
099e26bd | 182 | static int dispatch_thread_exit; |
fac6795d | 183 | |
1d4b027a | 184 | /* Sockets and FDs */ |
a4b35e07 MD |
185 | static int client_sock = -1; |
186 | static int apps_sock = -1; | |
2f77fc4b | 187 | int kernel_tracer_fd = -1; |
76d7553f | 188 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 189 | |
273ea72c DG |
190 | /* |
191 | * Quit pipe for all threads. This permits a single cancellation point | |
192 | * for all threads when receiving an event on the pipe. | |
193 | */ | |
76d7553f | 194 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 195 | |
099e26bd DG |
196 | /* |
197 | * This pipe is used to inform the thread managing application communication | |
198 | * that a command is queued and ready to be processed. | |
199 | */ | |
76d7553f | 200 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 201 | |
d0b96690 DG |
202 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
203 | ||
1d4b027a | 204 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 205 | static pthread_t apps_thread; |
d0b96690 | 206 | static pthread_t apps_notify_thread; |
099e26bd | 207 | static pthread_t reg_apps_thread; |
1d4b027a | 208 | static pthread_t client_thread; |
7a485870 | 209 | static pthread_t kernel_thread; |
099e26bd | 210 | static pthread_t dispatch_thread; |
44a5e5eb | 211 | static pthread_t health_thread; |
0b2dc8df | 212 | static pthread_t ht_cleanup_thread; |
022d91ba | 213 | static pthread_t agent_reg_thread; |
ef367a93 | 214 | static pthread_t load_session_thread; |
b3530820 | 215 | static pthread_t notification_thread; |
db66e574 | 216 | static pthread_t rotation_thread; |
d086f507 | 217 | static pthread_t timer_thread; |
5eb91c98 | 218 | |
099e26bd DG |
219 | /* |
220 | * UST registration command queue. This queue is tied with a futex and uses a N | |
221 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
222 | * | |
b22c5da8 DG |
223 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
224 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
225 | * the line new application socket and monitors it for any I/O error or clean | |
226 | * close that triggers an unregistration of the application. | |
099e26bd DG |
227 | */ |
228 | static struct ust_cmd_queue ust_cmd_queue; | |
229 | ||
b5541356 DG |
230 | /* |
231 | * Pointer initialized before thread creation. | |
232 | * | |
233 | * This points to the tracing session list containing the session count and a | |
234 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
235 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 236 | * |
d063d709 | 237 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 238 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
239 | */ |
240 | static struct ltt_session_list *session_list_ptr; | |
241 | ||
7753dea8 MD |
242 | int ust_consumerd64_fd = -1; |
243 | int ust_consumerd32_fd = -1; | |
244 | ||
2f77fc4b DG |
245 | static const char *module_proc_lttng = "/proc/lttng"; |
246 | ||
5c827ce0 DG |
247 | /* |
248 | * Consumer daemon state which is changed when spawning it, killing it or in | |
249 | * case of a fatal error. | |
250 | */ | |
251 | enum consumerd_state { | |
252 | CONSUMER_STARTED = 1, | |
253 | CONSUMER_STOPPED = 2, | |
254 | CONSUMER_ERROR = 3, | |
255 | }; | |
256 | ||
257 | /* | |
258 | * This consumer daemon state is used to validate if a client command will be | |
259 | * able to reach the consumer. If not, the client is informed. For instance, | |
260 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
261 | * error to the client. | |
262 | * | |
263 | * The following example shows a possible race condition of this scheme: | |
264 | * | |
265 | * consumer thread error happens | |
266 | * client cmd arrives | |
267 | * client cmd checks state -> still OK | |
268 | * consumer thread exit, sets error | |
269 | * client cmd try to talk to consumer | |
270 | * ... | |
271 | * | |
272 | * However, since the consumer is a different daemon, we have no way of making | |
273 | * sure the command will reach it safely even with this state flag. This is why | |
274 | * we consider that up to the state validation during command processing, the | |
275 | * command is safe. After that, we can not guarantee the correctness of the | |
276 | * client request vis-a-vis the consumer. | |
277 | */ | |
278 | static enum consumerd_state ust_consumerd_state; | |
279 | static enum consumerd_state kernel_consumerd_state; | |
280 | ||
12744796 DG |
281 | /* Set in main() with the current page size. */ |
282 | long page_size; | |
283 | ||
8782cc74 MD |
284 | /* Application health monitoring */ |
285 | struct health_app *health_sessiond; | |
286 | ||
f43f95a9 DG |
287 | /* Am I root or not. */ |
288 | int is_root; /* Set to 1 if the daemon is running as root */ | |
289 | ||
26296c48 JG |
290 | const char * const config_section_name = "sessiond"; |
291 | ||
ef367a93 JG |
292 | /* Load session thread information to operate. */ |
293 | struct load_session_thread_data *load_info; | |
294 | ||
b3530820 JG |
295 | /* Notification thread handle. */ |
296 | struct notification_thread_handle *notification_thread_handle; | |
297 | ||
db66e574 JD |
298 | /* Rotation thread handle. */ |
299 | struct rotation_thread_handle *rotation_thread_handle; | |
300 | ||
7c1d2758 JG |
301 | /* Global hash tables */ |
302 | struct lttng_ht *agent_apps_ht_by_sock = NULL; | |
303 | ||
97bc1426 | 304 | /* |
9cc1ba3b JG |
305 | * The initialization of the session daemon is done in multiple phases. |
306 | * | |
307 | * While all threads are launched near-simultaneously, only some of them | |
308 | * are needed to ensure the session daemon can start to respond to client | |
b3530820 | 309 | * requests. |
9cc1ba3b JG |
310 | * |
311 | * There are two important guarantees that we wish to offer with respect | |
312 | * to the initialisation of the session daemon: | |
313 | * - When the daemonize/background launcher process exits, the sessiond | |
314 | * is fully able to respond to client requests, | |
315 | * - Auto-loaded sessions are visible to clients. | |
316 | * | |
317 | * In order to achieve this, a number of support threads have to be launched | |
318 | * to allow the "client" thread to function properly. Moreover, since the | |
319 | * "load session" thread needs the client thread, we must provide a way | |
320 | * for the "load session" thread to know that the "client" thread is up | |
321 | * and running. | |
322 | * | |
323 | * Hence, the support threads decrement the lttng_sessiond_ready counter | |
324 | * while the "client" threads waits for it to reach 0. Once the "client" thread | |
325 | * unblocks, it posts the message_thread_ready semaphore which allows the | |
326 | * "load session" thread to progress. | |
327 | * | |
328 | * This implies that the "load session" thread is the last to be initialized | |
329 | * and will explicitly call sessiond_signal_parents(), which signals the parents | |
330 | * that the session daemon is fully initialized. | |
331 | * | |
332 | * The four (4) support threads are: | |
333 | * - agent_thread | |
334 | * - notification_thread | |
335 | * - rotation_thread | |
336 | * - health_thread | |
97bc1426 | 337 | */ |
bc4b3ff1 JG |
338 | #define NR_LTTNG_SESSIOND_SUPPORT_THREADS 4 |
339 | int lttng_sessiond_ready = NR_LTTNG_SESSIOND_SUPPORT_THREADS; | |
97bc1426 | 340 | |
5e97de00 JG |
341 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
342 | { | |
343 | return (fd == thread_quit_pipe[0] && (events & LPOLLIN)) ? 1 : 0; | |
344 | } | |
345 | ||
97bc1426 | 346 | /* Notify parents that we are ready for cmd and health check */ |
ef367a93 | 347 | LTTNG_HIDDEN |
9cc1ba3b | 348 | void sessiond_signal_parents(void) |
97bc1426 | 349 | { |
9cc1ba3b JG |
350 | /* |
351 | * Notify parent pid that we are ready to accept command | |
352 | * for client side. This ppid is the one from the | |
353 | * external process that spawned us. | |
354 | */ | |
355 | if (config.sig_parent) { | |
356 | kill(ppid, SIGUSR1); | |
357 | } | |
97bc1426 | 358 | |
9cc1ba3b JG |
359 | /* |
360 | * Notify the parent of the fork() process that we are | |
361 | * ready. | |
362 | */ | |
363 | if (config.daemonize || config.background) { | |
364 | kill(child_ppid, SIGUSR1); | |
97bc1426 MD |
365 | } |
366 | } | |
367 | ||
9cc1ba3b JG |
368 | LTTNG_HIDDEN |
369 | void sessiond_notify_ready(void) | |
370 | { | |
371 | /* | |
524423d6 JG |
372 | * This memory barrier is paired with the one performed by |
373 | * the client thread after it has seen that 'lttng_sessiond_ready' is 0. | |
374 | * | |
375 | * The purpose of these memory barriers is to ensure that all | |
376 | * initialization operations of the various threads that call this | |
377 | * function to signal that they are ready are commited/published | |
378 | * before the client thread can see the 'lttng_sessiond_ready' counter | |
379 | * reach 0. | |
380 | * | |
381 | * Note that this could be a 'write' memory barrier, but a full barrier | |
382 | * is used in case the code using this utility changes. The performance | |
383 | * implications of this choice are minimal since this is a slow path. | |
9cc1ba3b | 384 | */ |
524423d6 JG |
385 | cmm_smp_mb(); |
386 | uatomic_sub(<tng_sessiond_ready, 1); | |
9cc1ba3b JG |
387 | } |
388 | ||
4a15001e MD |
389 | static |
390 | int __sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size, | |
391 | int *a_pipe) | |
5eb91c98 DG |
392 | { |
393 | int ret; | |
394 | ||
d0b96690 | 395 | assert(events); |
5eb91c98 DG |
396 | |
397 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
398 | if (ret < 0) { | |
399 | goto error; | |
400 | } | |
401 | ||
402 | /* Add quit pipe */ | |
4a15001e | 403 | ret = lttng_poll_add(events, a_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
404 | if (ret < 0) { |
405 | goto error; | |
406 | } | |
407 | ||
408 | return 0; | |
409 | ||
410 | error: | |
411 | return ret; | |
412 | } | |
413 | ||
4a15001e MD |
414 | /* |
415 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
416 | */ | |
417 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) | |
418 | { | |
419 | return __sessiond_set_thread_pollset(events, size, thread_quit_pipe); | |
420 | } | |
421 | ||
273ea72c | 422 | /* |
5eb91c98 | 423 | * Init thread quit pipe. |
273ea72c DG |
424 | * |
425 | * Return -1 on error or 0 if all pipes are created. | |
426 | */ | |
4a15001e | 427 | static int __init_thread_quit_pipe(int *a_pipe) |
273ea72c | 428 | { |
730389d9 | 429 | int ret, i; |
273ea72c | 430 | |
4a15001e | 431 | ret = pipe(a_pipe); |
273ea72c | 432 | if (ret < 0) { |
730389d9 | 433 | PERROR("thread quit pipe"); |
273ea72c DG |
434 | goto error; |
435 | } | |
436 | ||
730389d9 | 437 | for (i = 0; i < 2; i++) { |
4a15001e | 438 | ret = fcntl(a_pipe[i], F_SETFD, FD_CLOEXEC); |
730389d9 DG |
439 | if (ret < 0) { |
440 | PERROR("fcntl"); | |
441 | goto error; | |
442 | } | |
443 | } | |
444 | ||
273ea72c DG |
445 | error: |
446 | return ret; | |
447 | } | |
448 | ||
4a15001e MD |
449 | static int init_thread_quit_pipe(void) |
450 | { | |
451 | return __init_thread_quit_pipe(thread_quit_pipe); | |
452 | } | |
453 | ||
099e26bd DG |
454 | /* |
455 | * Stop all threads by closing the thread quit pipe. | |
456 | */ | |
cf3af59e MD |
457 | static void stop_threads(void) |
458 | { | |
5eb91c98 DG |
459 | int ret; |
460 | ||
cf3af59e MD |
461 | /* Stopping all threads */ |
462 | DBG("Terminating all threads"); | |
54d01ffb | 463 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
464 | if (ret < 0) { |
465 | ERR("write error on thread quit pipe"); | |
466 | } | |
467 | ||
099e26bd | 468 | /* Dispatch thread */ |
26c9d55e | 469 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 470 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
471 | } |
472 | ||
e975f9f8 DG |
473 | /* |
474 | * Close every consumer sockets. | |
475 | */ | |
476 | static void close_consumer_sockets(void) | |
477 | { | |
478 | int ret; | |
479 | ||
480 | if (kconsumer_data.err_sock >= 0) { | |
481 | ret = close(kconsumer_data.err_sock); | |
482 | if (ret < 0) { | |
483 | PERROR("kernel consumer err_sock close"); | |
484 | } | |
485 | } | |
486 | if (ustconsumer32_data.err_sock >= 0) { | |
487 | ret = close(ustconsumer32_data.err_sock); | |
488 | if (ret < 0) { | |
a76cbd9f | 489 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
490 | } |
491 | } | |
492 | if (ustconsumer64_data.err_sock >= 0) { | |
493 | ret = close(ustconsumer64_data.err_sock); | |
494 | if (ret < 0) { | |
a76cbd9f | 495 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
496 | } |
497 | } | |
498 | if (kconsumer_data.cmd_sock >= 0) { | |
499 | ret = close(kconsumer_data.cmd_sock); | |
500 | if (ret < 0) { | |
501 | PERROR("kernel consumer cmd_sock close"); | |
502 | } | |
503 | } | |
504 | if (ustconsumer32_data.cmd_sock >= 0) { | |
505 | ret = close(ustconsumer32_data.cmd_sock); | |
506 | if (ret < 0) { | |
a76cbd9f | 507 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
508 | } |
509 | } | |
510 | if (ustconsumer64_data.cmd_sock >= 0) { | |
511 | ret = close(ustconsumer64_data.cmd_sock); | |
512 | if (ret < 0) { | |
a76cbd9f | 513 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
514 | } |
515 | } | |
b3530820 JG |
516 | if (kconsumer_data.channel_monitor_pipe >= 0) { |
517 | ret = close(kconsumer_data.channel_monitor_pipe); | |
518 | if (ret < 0) { | |
519 | PERROR("kernel consumer channel monitor pipe close"); | |
520 | } | |
521 | } | |
522 | if (ustconsumer32_data.channel_monitor_pipe >= 0) { | |
523 | ret = close(ustconsumer32_data.channel_monitor_pipe); | |
524 | if (ret < 0) { | |
525 | PERROR("UST consumerd32 channel monitor pipe close"); | |
526 | } | |
527 | } | |
528 | if (ustconsumer64_data.channel_monitor_pipe >= 0) { | |
529 | ret = close(ustconsumer64_data.channel_monitor_pipe); | |
530 | if (ret < 0) { | |
531 | PERROR("UST consumerd64 channel monitor pipe close"); | |
532 | } | |
533 | } | |
62c43103 JD |
534 | if (kconsumer_data.channel_rotate_pipe >= 0) { |
535 | ret = close(kconsumer_data.channel_rotate_pipe); | |
536 | if (ret < 0) { | |
537 | PERROR("kernel consumer channel rotate pipe close"); | |
538 | } | |
539 | } | |
540 | if (ustconsumer32_data.channel_rotate_pipe >= 0) { | |
541 | ret = close(ustconsumer32_data.channel_rotate_pipe); | |
542 | if (ret < 0) { | |
543 | PERROR("UST consumerd32 channel rotate pipe close"); | |
544 | } | |
545 | } | |
546 | if (ustconsumer64_data.channel_rotate_pipe >= 0) { | |
547 | ret = close(ustconsumer64_data.channel_rotate_pipe); | |
548 | if (ret < 0) { | |
549 | PERROR("UST consumerd64 channel rotate pipe close"); | |
550 | } | |
551 | } | |
e975f9f8 DG |
552 | } |
553 | ||
4e4714cb JR |
554 | /* |
555 | * Wait on consumer process termination. | |
556 | * | |
557 | * Need to be called with the consumer data lock held or from a context | |
558 | * ensuring no concurrent access to data (e.g: cleanup). | |
559 | */ | |
560 | static void wait_consumer(struct consumer_data *consumer_data) | |
561 | { | |
562 | pid_t ret; | |
563 | int status; | |
564 | ||
565 | if (consumer_data->pid <= 0) { | |
566 | return; | |
567 | } | |
568 | ||
569 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
570 | consumer_data->pid); | |
571 | ret = waitpid(consumer_data->pid, &status, 0); | |
572 | if (ret == -1) { | |
573 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
1640c24c | 574 | } else if (!WIFEXITED(status)) { |
4e4714cb JR |
575 | ERR("consumerd termination with error: %d", |
576 | WEXITSTATUS(ret)); | |
577 | } | |
578 | consumer_data->pid = 0; | |
579 | } | |
580 | ||
fac6795d | 581 | /* |
4a15001e | 582 | * Cleanup the session daemon's data structures. |
fac6795d | 583 | */ |
4a15001e | 584 | static void sessiond_cleanup(void) |
fac6795d | 585 | { |
ef599319 | 586 | int ret; |
af9737e9 | 587 | struct ltt_session *sess, *stmp; |
fac6795d | 588 | |
4a15001e | 589 | DBG("Cleanup sessiond"); |
e07ae692 | 590 | |
4e449f3f MD |
591 | /* |
592 | * Close the thread quit pipe. It has already done its job, | |
593 | * since we are now called. | |
594 | */ | |
2f77fc4b DG |
595 | utils_close_pipe(thread_quit_pipe); |
596 | ||
c9a2957d JG |
597 | ret = remove(config.pid_file_path.value); |
598 | if (ret < 0) { | |
599 | PERROR("remove pidfile %s", config.pid_file_path.value); | |
35f90c40 DG |
600 | } |
601 | ||
e6142f2e JG |
602 | DBG("Removing sessiond and consumerd content of directory %s", |
603 | config.rundir.value); | |
8c6c56c2 MD |
604 | |
605 | /* sessiond */ | |
e6142f2e JG |
606 | DBG("Removing %s", config.pid_file_path.value); |
607 | (void) unlink(config.pid_file_path.value); | |
8c6c56c2 | 608 | |
e6142f2e JG |
609 | DBG("Removing %s", config.agent_port_file_path.value); |
610 | (void) unlink(config.agent_port_file_path.value); | |
cd9290dd | 611 | |
8c6c56c2 | 612 | /* kconsumerd */ |
e6142f2e JG |
613 | DBG("Removing %s", kconsumer_data.err_unix_sock_path); |
614 | (void) unlink(kconsumer_data.err_unix_sock_path); | |
615 | ||
616 | DBG("Removing directory %s", config.kconsumerd_path.value); | |
617 | (void) rmdir(config.kconsumerd_path.value); | |
8c6c56c2 MD |
618 | |
619 | /* ust consumerd 32 */ | |
e6142f2e JG |
620 | DBG("Removing %s", config.consumerd32_err_unix_sock_path.value); |
621 | (void) unlink(config.consumerd32_err_unix_sock_path.value); | |
622 | ||
623 | DBG("Removing directory %s", config.consumerd32_path.value); | |
624 | (void) rmdir(config.consumerd32_path.value); | |
8c6c56c2 MD |
625 | |
626 | /* ust consumerd 64 */ | |
e6142f2e JG |
627 | DBG("Removing %s", config.consumerd64_err_unix_sock_path.value); |
628 | (void) unlink(config.consumerd64_err_unix_sock_path.value); | |
629 | ||
630 | DBG("Removing directory %s", config.consumerd64_path.value); | |
631 | (void) rmdir(config.consumerd64_path.value); | |
5461b305 | 632 | |
99bab54f | 633 | DBG("Cleaning up all sessions"); |
fac6795d | 634 | |
b5541356 | 635 | /* Destroy session list mutex */ |
273ea72c DG |
636 | if (session_list_ptr != NULL) { |
637 | pthread_mutex_destroy(&session_list_ptr->lock); | |
638 | ||
639 | /* Cleanup ALL session */ | |
54d01ffb DG |
640 | cds_list_for_each_entry_safe(sess, stmp, |
641 | &session_list_ptr->head, list) { | |
90936dcf JD |
642 | cmd_destroy_session(sess, kernel_poll_pipe[1], |
643 | notification_thread_handle); | |
273ea72c DG |
644 | } |
645 | } | |
646 | ||
4e4714cb JR |
647 | wait_consumer(&kconsumer_data); |
648 | wait_consumer(&ustconsumer64_data); | |
649 | wait_consumer(&ustconsumer32_data); | |
650 | ||
6a4e4039 JG |
651 | DBG("Cleaning up all agent apps"); |
652 | agent_app_ht_clean(); | |
653 | ||
099e26bd | 654 | DBG("Closing all UST sockets"); |
56fff090 | 655 | ust_app_clean_list(); |
7972aab2 | 656 | buffer_reg_destroy_registries(); |
099e26bd | 657 | |
e6142f2e | 658 | if (is_root && !config.no_kernel) { |
4fba7219 | 659 | DBG2("Closing kernel fd"); |
a4b35e07 | 660 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
661 | ret = close(kernel_tracer_fd); |
662 | if (ret) { | |
663 | PERROR("close"); | |
664 | } | |
a4b35e07 | 665 | } |
2f50c8a3 | 666 | DBG("Unloading kernel modules"); |
096102bd | 667 | modprobe_remove_lttng_all(); |
834978fd | 668 | free(syscall_table); |
2f50c8a3 | 669 | } |
2f77fc4b | 670 | |
e975f9f8 DG |
671 | close_consumer_sockets(); |
672 | ||
ef367a93 JG |
673 | if (load_info) { |
674 | load_session_destroy_data(load_info); | |
675 | free(load_info); | |
676 | } | |
677 | ||
c9cb3e7d JG |
678 | /* |
679 | * We do NOT rmdir rundir because there are other processes | |
680 | * using it, for instance lttng-relayd, which can start in | |
681 | * parallel with this teardown. | |
682 | */ | |
4a15001e MD |
683 | } |
684 | ||
685 | /* | |
686 | * Cleanup the daemon's option data structures. | |
687 | */ | |
688 | static void sessiond_cleanup_options(void) | |
689 | { | |
690 | DBG("Cleaning up options"); | |
691 | ||
e6142f2e | 692 | sessiond_config_fini(&config); |
c9cb3e7d | 693 | |
7567352f | 694 | run_as_destroy_worker(); |
fac6795d DG |
695 | } |
696 | ||
e065084a | 697 | /* |
d063d709 | 698 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 699 | * |
d063d709 | 700 | * Return lttcomm error code. |
e065084a DG |
701 | */ |
702 | static int send_unix_sock(int sock, void *buf, size_t len) | |
703 | { | |
704 | /* Check valid length */ | |
c617c0c6 | 705 | if (len == 0) { |
e065084a DG |
706 | return -1; |
707 | } | |
708 | ||
709 | return lttcomm_send_unix_sock(sock, buf, len); | |
710 | } | |
711 | ||
5461b305 | 712 | /* |
d063d709 | 713 | * Free memory of a command context structure. |
5461b305 | 714 | */ |
a2fb29a5 | 715 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 716 | { |
a2fb29a5 DG |
717 | DBG("Clean command context structure"); |
718 | if (*cmd_ctx) { | |
719 | if ((*cmd_ctx)->llm) { | |
720 | free((*cmd_ctx)->llm); | |
5461b305 | 721 | } |
a2fb29a5 DG |
722 | if ((*cmd_ctx)->lsm) { |
723 | free((*cmd_ctx)->lsm); | |
5461b305 | 724 | } |
a2fb29a5 DG |
725 | free(*cmd_ctx); |
726 | *cmd_ctx = NULL; | |
5461b305 DG |
727 | } |
728 | } | |
729 | ||
fac6795d | 730 | /* |
0fdd1e2c | 731 | * Notify UST applications using the shm mmap futex. |
fac6795d | 732 | */ |
0fdd1e2c | 733 | static int notify_ust_apps(int active) |
fac6795d | 734 | { |
0fdd1e2c | 735 | char *wait_shm_mmap; |
fac6795d | 736 | |
0fdd1e2c | 737 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 738 | |
0fdd1e2c | 739 | /* See shm.c for this call implying mmap, shm and futex calls */ |
e6142f2e | 740 | wait_shm_mmap = shm_ust_get_mmap(config.wait_shm_path.value, is_root); |
0fdd1e2c | 741 | if (wait_shm_mmap == NULL) { |
fac6795d DG |
742 | goto error; |
743 | } | |
744 | ||
0fdd1e2c DG |
745 | /* Wake waiting process */ |
746 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
747 | ||
748 | /* Apps notified successfully */ | |
749 | return 0; | |
fac6795d DG |
750 | |
751 | error: | |
0fdd1e2c | 752 | return -1; |
fac6795d DG |
753 | } |
754 | ||
e065084a | 755 | /* |
d063d709 DG |
756 | * Setup the outgoing data buffer for the response (llm) by allocating the |
757 | * right amount of memory and copying the original information from the lsm | |
758 | * structure. | |
ca95a216 | 759 | * |
6e10c9b9 | 760 | * Return 0 on success, negative value on error. |
ca95a216 | 761 | */ |
6e10c9b9 PP |
762 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, |
763 | const void *payload_buf, size_t payload_len, | |
764 | const void *cmd_header_buf, size_t cmd_header_len) | |
ca95a216 | 765 | { |
6e10c9b9 PP |
766 | int ret = 0; |
767 | const size_t header_len = sizeof(struct lttcomm_lttng_msg); | |
768 | const size_t cmd_header_offset = header_len; | |
769 | const size_t payload_offset = cmd_header_offset + cmd_header_len; | |
770 | const size_t total_msg_size = header_len + cmd_header_len + payload_len; | |
ca95a216 | 771 | |
6e10c9b9 | 772 | cmd_ctx->llm = zmalloc(total_msg_size); |
5461b305 | 773 | |
5461b305 | 774 | if (cmd_ctx->llm == NULL) { |
76d7553f | 775 | PERROR("zmalloc"); |
5461b305 | 776 | ret = -ENOMEM; |
6e10c9b9 | 777 | goto end; |
ca95a216 DG |
778 | } |
779 | ||
5461b305 DG |
780 | /* Copy common data */ |
781 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 782 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
6e10c9b9 PP |
783 | cmd_ctx->llm->cmd_header_size = cmd_header_len; |
784 | cmd_ctx->llm->data_size = payload_len; | |
785 | cmd_ctx->lttng_msg_size = total_msg_size; | |
5461b305 | 786 | |
6e10c9b9 | 787 | /* Copy command header */ |
b4e3ceb9 PP |
788 | if (cmd_header_len) { |
789 | memcpy(((uint8_t *) cmd_ctx->llm) + cmd_header_offset, cmd_header_buf, | |
790 | cmd_header_len); | |
791 | } | |
5461b305 | 792 | |
6e10c9b9 | 793 | /* Copy payload */ |
b4e3ceb9 PP |
794 | if (payload_len) { |
795 | memcpy(((uint8_t *) cmd_ctx->llm) + payload_offset, payload_buf, | |
796 | payload_len); | |
797 | } | |
ca95a216 | 798 | |
6e10c9b9 | 799 | end: |
ca95a216 DG |
800 | return ret; |
801 | } | |
802 | ||
6e10c9b9 PP |
803 | /* |
804 | * Version of setup_lttng_msg() without command header. | |
805 | */ | |
806 | static int setup_lttng_msg_no_cmd_header(struct command_ctx *cmd_ctx, | |
807 | void *payload_buf, size_t payload_len) | |
808 | { | |
809 | return setup_lttng_msg(cmd_ctx, payload_buf, payload_len, NULL, 0); | |
810 | } | |
7a485870 | 811 | /* |
5eb91c98 | 812 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 813 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 814 | */ |
5eb91c98 | 815 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 816 | { |
5eb91c98 | 817 | int ret; |
7a485870 DG |
818 | struct ltt_session *session; |
819 | struct ltt_kernel_channel *channel; | |
820 | ||
5eb91c98 | 821 | DBG("Updating kernel poll set"); |
7a485870 | 822 | |
54d01ffb | 823 | session_lock_list(); |
b5541356 | 824 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 825 | session_lock(session); |
7a485870 | 826 | if (session->kernel_session == NULL) { |
54d01ffb | 827 | session_unlock(session); |
7a485870 DG |
828 | continue; |
829 | } | |
7a485870 | 830 | |
54d01ffb DG |
831 | cds_list_for_each_entry(channel, |
832 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
833 | /* Add channel fd to the kernel poll set */ |
834 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
835 | if (ret < 0) { | |
54d01ffb | 836 | session_unlock(session); |
5eb91c98 DG |
837 | goto error; |
838 | } | |
839 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 840 | } |
54d01ffb | 841 | session_unlock(session); |
7a485870 | 842 | } |
54d01ffb | 843 | session_unlock_list(); |
7a485870 | 844 | |
5eb91c98 | 845 | return 0; |
7a485870 DG |
846 | |
847 | error: | |
54d01ffb | 848 | session_unlock_list(); |
7a485870 DG |
849 | return -1; |
850 | } | |
851 | ||
852 | /* | |
54d01ffb | 853 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 854 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 855 | * |
d063d709 | 856 | * Useful for CPU hotplug feature. |
7a485870 | 857 | */ |
7f032058 | 858 | static int update_kernel_stream(int fd) |
7a485870 DG |
859 | { |
860 | int ret = 0; | |
861 | struct ltt_session *session; | |
173af62f | 862 | struct ltt_kernel_session *ksess; |
7a485870 DG |
863 | struct ltt_kernel_channel *channel; |
864 | ||
865 | DBG("Updating kernel streams for channel fd %d", fd); | |
866 | ||
54d01ffb | 867 | session_lock_list(); |
b5541356 | 868 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 869 | session_lock(session); |
7a485870 | 870 | if (session->kernel_session == NULL) { |
54d01ffb | 871 | session_unlock(session); |
7a485870 DG |
872 | continue; |
873 | } | |
173af62f | 874 | ksess = session->kernel_session; |
d9800920 | 875 | |
4a15001e MD |
876 | cds_list_for_each_entry(channel, |
877 | &ksess->channel_list.head, list) { | |
878 | struct lttng_ht_iter iter; | |
879 | struct consumer_socket *socket; | |
d9800920 | 880 | |
4a15001e MD |
881 | if (channel->fd != fd) { |
882 | continue; | |
883 | } | |
884 | DBG("Channel found, updating kernel streams"); | |
885 | ret = kernel_open_channel_stream(channel); | |
886 | if (ret < 0) { | |
887 | goto error; | |
888 | } | |
889 | /* Update the stream global counter */ | |
890 | ksess->stream_count_global += ret; | |
891 | ||
892 | /* | |
893 | * Have we already sent fds to the consumer? If yes, it | |
894 | * means that tracing is started so it is safe to send | |
895 | * our updated stream fds. | |
896 | */ | |
897 | if (ksess->consumer_fds_sent != 1 | |
898 | || ksess->consumer == NULL) { | |
899 | ret = -1; | |
900 | goto error; | |
901 | } | |
902 | ||
903 | rcu_read_lock(); | |
904 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
905 | &iter.iter, socket, node.node) { | |
906 | pthread_mutex_lock(socket->lock); | |
1fc1b7c8 | 907 | ret = kernel_consumer_send_channel_streams(socket, |
4a15001e MD |
908 | channel, ksess, |
909 | session->output_traces ? 1 : 0); | |
910 | pthread_mutex_unlock(socket->lock); | |
911 | if (ret < 0) { | |
e7fe706f | 912 | rcu_read_unlock(); |
4a15001e | 913 | goto error; |
7a485870 | 914 | } |
7a485870 | 915 | } |
4a15001e | 916 | rcu_read_unlock(); |
7a485870 | 917 | } |
54d01ffb | 918 | session_unlock(session); |
7a485870 | 919 | } |
54d01ffb | 920 | session_unlock_list(); |
b3c750d2 | 921 | return ret; |
7a485870 | 922 | |
b3c750d2 | 923 | error: |
54d01ffb DG |
924 | session_unlock(session); |
925 | session_unlock_list(); | |
7a485870 DG |
926 | return ret; |
927 | } | |
928 | ||
487cf67c | 929 | /* |
ffe60014 DG |
930 | * For each tracing session, update newly registered apps. The session list |
931 | * lock MUST be acquired before calling this. | |
487cf67c DG |
932 | */ |
933 | static void update_ust_app(int app_sock) | |
934 | { | |
935 | struct ltt_session *sess, *stmp; | |
936 | ||
fdadac08 DG |
937 | /* Consumer is in an ERROR state. Stop any application update. */ |
938 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
939 | /* Stop the update process since the consumer is dead. */ | |
940 | return; | |
941 | } | |
942 | ||
487cf67c DG |
943 | /* For all tracing session(s) */ |
944 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
a9ad0c8f MD |
945 | struct ust_app *app; |
946 | ||
4ee14516 | 947 | session_lock(sess); |
a9ad0c8f MD |
948 | if (!sess->ust_session) { |
949 | goto unlock_session; | |
950 | } | |
951 | ||
952 | rcu_read_lock(); | |
953 | assert(app_sock >= 0); | |
954 | app = ust_app_find_by_sock(app_sock); | |
955 | if (app == NULL) { | |
956 | /* | |
957 | * Application can be unregistered before so | |
958 | * this is possible hence simply stopping the | |
959 | * update. | |
960 | */ | |
961 | DBG3("UST app update failed to find app sock %d", | |
962 | app_sock); | |
963 | goto unlock_rcu; | |
421cb601 | 964 | } |
a9ad0c8f MD |
965 | ust_app_global_update(sess->ust_session, app); |
966 | unlock_rcu: | |
967 | rcu_read_unlock(); | |
968 | unlock_session: | |
4ee14516 | 969 | session_unlock(sess); |
487cf67c DG |
970 | } |
971 | } | |
972 | ||
7a485870 | 973 | /* |
d063d709 | 974 | * This thread manage event coming from the kernel. |
7a485870 | 975 | * |
d063d709 DG |
976 | * Features supported in this thread: |
977 | * -) CPU Hotplug | |
7a485870 DG |
978 | */ |
979 | static void *thread_manage_kernel(void *data) | |
980 | { | |
139ac872 | 981 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 982 | uint32_t revents, nb_fd; |
7a485870 | 983 | char tmp; |
5eb91c98 | 984 | struct lttng_poll_event events; |
7a485870 | 985 | |
6993eeb3 | 986 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 987 | |
6c71277b | 988 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 989 | |
d5d63bf1 DG |
990 | /* |
991 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 992 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 993 | */ |
6d737ce4 | 994 | lttng_poll_init(&events); |
d5d63bf1 | 995 | |
e547b070 | 996 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
997 | goto error_testpoint; |
998 | } | |
8ac94142 | 999 | |
840cb59c | 1000 | health_code_update(); |
44a5e5eb | 1001 | |
e547b070 | 1002 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 1003 | goto error_testpoint; |
6993eeb3 CB |
1004 | } |
1005 | ||
7a485870 | 1006 | while (1) { |
840cb59c | 1007 | health_code_update(); |
44a5e5eb | 1008 | |
7a485870 | 1009 | if (update_poll_flag == 1) { |
d21b0d71 DG |
1010 | /* Clean events object. We are about to populate it again. */ |
1011 | lttng_poll_clean(&events); | |
1012 | ||
d0b96690 | 1013 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
1014 | if (ret < 0) { |
1015 | goto error_poll_create; | |
1016 | } | |
1017 | ||
1018 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
1019 | if (ret < 0) { | |
1020 | goto error; | |
1021 | } | |
5f822d0a | 1022 | |
d21b0d71 | 1023 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
1024 | ret = update_kernel_poll(&events); |
1025 | if (ret < 0) { | |
7a485870 DG |
1026 | goto error; |
1027 | } | |
1028 | update_poll_flag = 0; | |
1029 | } | |
1030 | ||
7fa2082e | 1031 | DBG("Thread kernel polling"); |
7a485870 DG |
1032 | |
1033 | /* Poll infinite value of time */ | |
88f2b785 | 1034 | restart: |
a78af745 | 1035 | health_poll_entry(); |
5eb91c98 | 1036 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1037 | DBG("Thread kernel return from poll on %d fds", |
1038 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1039 | health_poll_exit(); |
7a485870 | 1040 | if (ret < 0) { |
88f2b785 MD |
1041 | /* |
1042 | * Restart interrupted system call. | |
1043 | */ | |
1044 | if (errno == EINTR) { | |
1045 | goto restart; | |
1046 | } | |
7a485870 DG |
1047 | goto error; |
1048 | } else if (ret == 0) { | |
1049 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
1050 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
1051 | "This should not have happened! Continuing..."); | |
7a485870 DG |
1052 | continue; |
1053 | } | |
1054 | ||
0d9c5d77 DG |
1055 | nb_fd = ret; |
1056 | ||
5eb91c98 DG |
1057 | for (i = 0; i < nb_fd; i++) { |
1058 | /* Fetch once the poll data */ | |
1059 | revents = LTTNG_POLL_GETEV(&events, i); | |
1060 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 1061 | |
840cb59c | 1062 | health_code_update(); |
44a5e5eb | 1063 | |
fd20dac9 MD |
1064 | if (!revents) { |
1065 | /* No activity for this FD (poll implementation). */ | |
1066 | continue; | |
1067 | } | |
1068 | ||
5eb91c98 | 1069 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1070 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1071 | if (ret) { |
139ac872 MD |
1072 | err = 0; |
1073 | goto exit; | |
5eb91c98 | 1074 | } |
7a485870 | 1075 | |
5eb91c98 | 1076 | /* Check for data on kernel pipe */ |
03e43155 MD |
1077 | if (revents & LPOLLIN) { |
1078 | if (pollfd == kernel_poll_pipe[0]) { | |
1079 | (void) lttng_read(kernel_poll_pipe[0], | |
1080 | &tmp, 1); | |
1081 | /* | |
1082 | * Ret value is useless here, if this pipe gets any actions an | |
1083 | * update is required anyway. | |
1084 | */ | |
1085 | update_poll_flag = 1; | |
1086 | continue; | |
1087 | } else { | |
1088 | /* | |
1089 | * New CPU detected by the kernel. Adding kernel stream to | |
1090 | * kernel session and updating the kernel consumer | |
1091 | */ | |
7f032058 | 1092 | ret = update_kernel_stream(pollfd); |
5eb91c98 DG |
1093 | if (ret < 0) { |
1094 | continue; | |
1095 | } | |
1096 | break; | |
7a485870 | 1097 | } |
03e43155 MD |
1098 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1099 | update_poll_flag = 1; | |
1100 | continue; | |
1101 | } else { | |
1102 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1103 | goto error; | |
7a485870 DG |
1104 | } |
1105 | } | |
1106 | } | |
1107 | ||
139ac872 | 1108 | exit: |
7a485870 | 1109 | error: |
5eb91c98 | 1110 | lttng_poll_clean(&events); |
76d7553f | 1111 | error_poll_create: |
6993eeb3 | 1112 | error_testpoint: |
6620da75 DG |
1113 | utils_close_pipe(kernel_poll_pipe); |
1114 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 1115 | if (err) { |
840cb59c | 1116 | health_error(); |
139ac872 | 1117 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
1118 | WARN("Kernel thread died unexpectedly. " |
1119 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 1120 | } |
8782cc74 | 1121 | health_unregister(health_sessiond); |
76d7553f | 1122 | DBG("Kernel thread dying"); |
7a485870 DG |
1123 | return NULL; |
1124 | } | |
1125 | ||
a23ec3a7 DG |
1126 | /* |
1127 | * Signal pthread condition of the consumer data that the thread. | |
1128 | */ | |
1129 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
1130 | { | |
1131 | pthread_mutex_lock(&data->cond_mutex); | |
1132 | ||
1133 | /* | |
1134 | * The state is set before signaling. It can be any value, it's the waiter | |
1135 | * job to correctly interpret this condition variable associated to the | |
1136 | * consumer pthread_cond. | |
1137 | * | |
1138 | * A value of 0 means that the corresponding thread of the consumer data | |
1139 | * was not started. 1 indicates that the thread has started and is ready | |
1140 | * for action. A negative value means that there was an error during the | |
1141 | * thread bootstrap. | |
1142 | */ | |
1143 | data->consumer_thread_is_ready = state; | |
1144 | (void) pthread_cond_signal(&data->cond); | |
1145 | ||
1146 | pthread_mutex_unlock(&data->cond_mutex); | |
1147 | } | |
1148 | ||
1d4b027a | 1149 | /* |
3bd1e081 | 1150 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1151 | */ |
3bd1e081 | 1152 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1153 | { |
42fc1d0b | 1154 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 1155 | uint32_t revents, nb_fd; |
1d4b027a | 1156 | enum lttcomm_return_code code; |
5eb91c98 | 1157 | struct lttng_poll_event events; |
3bd1e081 | 1158 | struct consumer_data *consumer_data = data; |
b3530820 | 1159 | struct consumer_socket *cmd_socket_wrapper = NULL; |
1d4b027a | 1160 | |
3bd1e081 | 1161 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1162 | |
34c1e15a MD |
1163 | rcu_register_thread(); |
1164 | rcu_thread_online(); | |
1165 | ||
6c71277b | 1166 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1167 | |
855060f8 | 1168 | health_code_update(); |
9449cc75 | 1169 | |
5eb91c98 | 1170 | /* |
331744e3 JD |
1171 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1172 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1173 | */ |
331744e3 | 1174 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1175 | if (ret < 0) { |
76d7553f | 1176 | goto error_poll; |
5eb91c98 | 1177 | } |
273ea72c | 1178 | |
edb8b045 DG |
1179 | /* |
1180 | * The error socket here is already in a listening state which was done | |
1181 | * just before spawning this thread to avoid a race between the consumer | |
1182 | * daemon exec trying to connect and the listen() call. | |
1183 | */ | |
3bd1e081 | 1184 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1185 | if (ret < 0) { |
1186 | goto error; | |
1187 | } | |
1188 | ||
840cb59c | 1189 | health_code_update(); |
44a5e5eb | 1190 | |
331744e3 | 1191 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1192 | restart: |
a78af745 | 1193 | health_poll_entry(); |
8ac94142 | 1194 | |
e547b070 | 1195 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
1196 | goto error; |
1197 | } | |
8ac94142 | 1198 | |
5eb91c98 | 1199 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1200 | health_poll_exit(); |
273ea72c | 1201 | if (ret < 0) { |
88f2b785 MD |
1202 | /* |
1203 | * Restart interrupted system call. | |
1204 | */ | |
1205 | if (errno == EINTR) { | |
1206 | goto restart; | |
1207 | } | |
273ea72c DG |
1208 | goto error; |
1209 | } | |
1210 | ||
0d9c5d77 DG |
1211 | nb_fd = ret; |
1212 | ||
5eb91c98 DG |
1213 | for (i = 0; i < nb_fd; i++) { |
1214 | /* Fetch once the poll data */ | |
1215 | revents = LTTNG_POLL_GETEV(&events, i); | |
1216 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1217 | ||
840cb59c | 1218 | health_code_update(); |
44a5e5eb | 1219 | |
fd20dac9 MD |
1220 | if (!revents) { |
1221 | /* No activity for this FD (poll implementation). */ | |
1222 | continue; | |
1223 | } | |
1224 | ||
5eb91c98 | 1225 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1226 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1227 | if (ret) { |
139ac872 MD |
1228 | err = 0; |
1229 | goto exit; | |
5eb91c98 DG |
1230 | } |
1231 | ||
1232 | /* Event on the registration socket */ | |
3bd1e081 | 1233 | if (pollfd == consumer_data->err_sock) { |
03e43155 MD |
1234 | if (revents & LPOLLIN) { |
1235 | continue; | |
1236 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1237 | ERR("consumer err socket poll error"); |
5eb91c98 | 1238 | goto error; |
03e43155 MD |
1239 | } else { |
1240 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1241 | goto error; | |
5eb91c98 DG |
1242 | } |
1243 | } | |
273ea72c DG |
1244 | } |
1245 | ||
3bd1e081 | 1246 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1247 | if (sock < 0) { |
1248 | goto error; | |
1249 | } | |
1250 | ||
b662582b DG |
1251 | /* |
1252 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1253 | * show must go on. | |
1254 | */ | |
1255 | (void) utils_set_fd_cloexec(sock); | |
1256 | ||
840cb59c | 1257 | health_code_update(); |
44a5e5eb | 1258 | |
3bd1e081 | 1259 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1260 | |
712ea556 | 1261 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1262 | ret = lttcomm_recv_unix_sock(sock, &code, |
1263 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1264 | if (ret <= 0) { |
1265 | goto error; | |
1266 | } | |
1267 | ||
840cb59c | 1268 | health_code_update(); |
b3530820 | 1269 | if (code != LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
3bd1e081 | 1270 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1271 | lttcomm_get_readable_code(-code)); |
1272 | goto error; | |
1273 | } | |
1274 | ||
b3530820 JG |
1275 | /* Connect both command and metadata sockets. */ |
1276 | consumer_data->cmd_sock = | |
1277 | lttcomm_connect_unix_sock( | |
1278 | consumer_data->cmd_unix_sock_path); | |
1279 | consumer_data->metadata_fd = | |
1280 | lttcomm_connect_unix_sock( | |
1281 | consumer_data->cmd_unix_sock_path); | |
1282 | if (consumer_data->cmd_sock < 0 || consumer_data->metadata_fd < 0) { | |
1283 | PERROR("consumer connect cmd socket"); | |
1284 | /* On error, signal condition and quit. */ | |
1285 | signal_consumer_condition(consumer_data, -1); | |
1286 | goto error; | |
1287 | } | |
1288 | ||
1289 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; | |
1290 | ||
1291 | /* Create metadata socket lock. */ | |
1292 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1293 | if (consumer_data->metadata_sock.lock == NULL) { | |
1294 | PERROR("zmalloc pthread mutex"); | |
1295 | goto error; | |
1296 | } | |
1297 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1298 | ||
1299 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); | |
1300 | DBG("Consumer metadata socket ready (fd: %d)", | |
1301 | consumer_data->metadata_fd); | |
1302 | ||
1303 | /* | |
1304 | * Remove the consumerd error sock since we've established a connection. | |
1305 | */ | |
3bd1e081 | 1306 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1307 | if (ret < 0) { |
72079cae DG |
1308 | goto error; |
1309 | } | |
1310 | ||
331744e3 | 1311 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1312 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1313 | if (ret < 0) { | |
72079cae | 1314 | goto error; |
5eb91c98 DG |
1315 | } |
1316 | ||
331744e3 | 1317 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1318 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1319 | LPOLLIN | LPOLLRDHUP); |
1320 | if (ret < 0) { | |
1321 | goto error; | |
1322 | } | |
1323 | ||
840cb59c | 1324 | health_code_update(); |
44a5e5eb | 1325 | |
b3530820 | 1326 | /* |
62c43103 JD |
1327 | * Transfer the write-end of the channel monitoring and rotate pipe |
1328 | * to the consumer by issuing a SET_CHANNEL_MONITOR_PIPE and | |
1329 | * SET_CHANNEL_ROTATE_PIPE commands. | |
b3530820 JG |
1330 | */ |
1331 | cmd_socket_wrapper = consumer_allocate_socket(&consumer_data->cmd_sock); | |
1332 | if (!cmd_socket_wrapper) { | |
1333 | goto error; | |
1334 | } | |
3e4dc117 | 1335 | cmd_socket_wrapper->lock = &consumer_data->lock; |
b3530820 JG |
1336 | |
1337 | ret = consumer_send_channel_monitor_pipe(cmd_socket_wrapper, | |
1338 | consumer_data->channel_monitor_pipe); | |
1339 | if (ret) { | |
1340 | goto error; | |
1341 | } | |
62c43103 JD |
1342 | |
1343 | ret = consumer_send_channel_rotate_pipe(cmd_socket_wrapper, | |
1344 | consumer_data->channel_rotate_pipe); | |
1345 | if (ret) { | |
1346 | goto error; | |
1347 | } | |
1348 | ||
b3530820 JG |
1349 | /* Discard the socket wrapper as it is no longer needed. */ |
1350 | consumer_destroy_socket(cmd_socket_wrapper); | |
1351 | cmd_socket_wrapper = NULL; | |
1352 | ||
1353 | /* The thread is completely initialized, signal that it is ready. */ | |
1354 | signal_consumer_condition(consumer_data, 1); | |
1355 | ||
331744e3 | 1356 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1357 | restart_poll: |
331744e3 | 1358 | while (1) { |
42fc1d0b DG |
1359 | health_code_update(); |
1360 | ||
1361 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
1362 | if (should_quit) { | |
1363 | /* Not a health error. */ | |
1364 | err = 0; | |
1365 | goto exit; | |
1366 | } | |
1367 | ||
331744e3 JD |
1368 | health_poll_entry(); |
1369 | ret = lttng_poll_wait(&events, -1); | |
1370 | health_poll_exit(); | |
1371 | if (ret < 0) { | |
1372 | /* | |
1373 | * Restart interrupted system call. | |
1374 | */ | |
1375 | if (errno == EINTR) { | |
1376 | goto restart_poll; | |
1377 | } | |
1378 | goto error; | |
88f2b785 | 1379 | } |
72079cae | 1380 | |
331744e3 | 1381 | nb_fd = ret; |
0d9c5d77 | 1382 | |
331744e3 JD |
1383 | for (i = 0; i < nb_fd; i++) { |
1384 | /* Fetch once the poll data */ | |
1385 | revents = LTTNG_POLL_GETEV(&events, i); | |
1386 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1387 | |
331744e3 | 1388 | health_code_update(); |
44a5e5eb | 1389 | |
fd20dac9 MD |
1390 | if (!revents) { |
1391 | /* No activity for this FD (poll implementation). */ | |
1392 | continue; | |
1393 | } | |
1394 | ||
42fc1d0b DG |
1395 | /* |
1396 | * Thread quit pipe has been triggered, flag that we should stop | |
1397 | * but continue the current loop to handle potential data from | |
1398 | * consumer. | |
1399 | */ | |
1400 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 1401 | |
331744e3 JD |
1402 | if (pollfd == sock) { |
1403 | /* Event on the consumerd socket */ | |
03e43155 MD |
1404 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1405 | && !(revents & LPOLLIN)) { | |
331744e3 JD |
1406 | ERR("consumer err socket second poll error"); |
1407 | goto error; | |
1408 | } | |
1409 | health_code_update(); | |
1410 | /* Wait for any kconsumerd error */ | |
1411 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1412 | sizeof(enum lttcomm_return_code)); | |
1413 | if (ret <= 0) { | |
1414 | ERR("consumer closed the command socket"); | |
1415 | goto error; | |
1416 | } | |
1417 | ||
1418 | ERR("consumer return code : %s", | |
1419 | lttcomm_get_readable_code(-code)); | |
1420 | ||
1421 | goto exit; | |
4ce514c4 | 1422 | } else if (pollfd == consumer_data->metadata_fd) { |
03e43155 MD |
1423 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1424 | && !(revents & LPOLLIN)) { | |
1425 | ERR("consumer err metadata socket second poll error"); | |
1426 | goto error; | |
1427 | } | |
331744e3 JD |
1428 | /* UST metadata requests */ |
1429 | ret = ust_consumer_metadata_request( | |
1430 | &consumer_data->metadata_sock); | |
1431 | if (ret < 0) { | |
1432 | ERR("Handling metadata request"); | |
1433 | goto error; | |
1434 | } | |
5eb91c98 | 1435 | } |
42fc1d0b | 1436 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 1437 | } |
331744e3 | 1438 | health_code_update(); |
5eb91c98 DG |
1439 | } |
1440 | ||
139ac872 | 1441 | exit: |
1d4b027a | 1442 | error: |
fdadac08 DG |
1443 | /* |
1444 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1445 | * thread might be using them so get exclusive access which will abort all |
1446 | * other consumer command by other threads. | |
fdadac08 DG |
1447 | */ |
1448 | pthread_mutex_lock(&consumer_data->lock); | |
1449 | ||
5c827ce0 DG |
1450 | /* Immediately set the consumerd state to stopped */ |
1451 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1452 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1453 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1454 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1455 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1456 | } else { | |
1457 | /* Code flow error... */ | |
1458 | assert(0); | |
1459 | } | |
1460 | ||
76d7553f MD |
1461 | if (consumer_data->err_sock >= 0) { |
1462 | ret = close(consumer_data->err_sock); | |
1463 | if (ret) { | |
1464 | PERROR("close"); | |
1465 | } | |
a76cbd9f | 1466 | consumer_data->err_sock = -1; |
76d7553f MD |
1467 | } |
1468 | if (consumer_data->cmd_sock >= 0) { | |
1469 | ret = close(consumer_data->cmd_sock); | |
1470 | if (ret) { | |
1471 | PERROR("close"); | |
1472 | } | |
a76cbd9f | 1473 | consumer_data->cmd_sock = -1; |
76d7553f | 1474 | } |
96544455 SS |
1475 | if (consumer_data->metadata_sock.fd_ptr && |
1476 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1477 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1478 | if (ret) { |
1479 | PERROR("close"); | |
1480 | } | |
1481 | } | |
76d7553f MD |
1482 | if (sock >= 0) { |
1483 | ret = close(sock); | |
1484 | if (ret) { | |
1485 | PERROR("close"); | |
1486 | } | |
1487 | } | |
273ea72c | 1488 | |
3bd1e081 MD |
1489 | unlink(consumer_data->err_unix_sock_path); |
1490 | unlink(consumer_data->cmd_unix_sock_path); | |
fdadac08 | 1491 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1492 | |
fdadac08 | 1493 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1494 | if (consumer_data->metadata_sock.lock) { |
1495 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1496 | free(consumer_data->metadata_sock.lock); | |
1497 | } | |
5eb91c98 | 1498 | lttng_poll_clean(&events); |
b3530820 JG |
1499 | |
1500 | if (cmd_socket_wrapper) { | |
1501 | consumer_destroy_socket(cmd_socket_wrapper); | |
1502 | } | |
76d7553f | 1503 | error_poll: |
139ac872 | 1504 | if (err) { |
840cb59c | 1505 | health_error(); |
139ac872 MD |
1506 | ERR("Health error occurred in %s", __func__); |
1507 | } | |
8782cc74 | 1508 | health_unregister(health_sessiond); |
76d7553f | 1509 | DBG("consumer thread cleanup completed"); |
0177d773 | 1510 | |
34c1e15a MD |
1511 | rcu_thread_offline(); |
1512 | rcu_unregister_thread(); | |
1513 | ||
5eb91c98 | 1514 | return NULL; |
099e26bd DG |
1515 | } |
1516 | ||
099e26bd | 1517 | /* |
81f04d5f JG |
1518 | * This thread receives application command sockets (FDs) on the |
1519 | * apps_cmd_pipe and waits (polls) on them until they are closed | |
1520 | * or an error occurs. | |
1521 | * | |
1522 | * At that point, it flushes the data (tracing and metadata) associated | |
1523 | * with this application and tears down ust app sessions and other | |
1524 | * associated data structures through ust_app_unregister(). | |
1525 | * | |
1526 | * Note that this thread never sends commands to the applications | |
1527 | * through the command sockets; it merely listens for hang-ups | |
1528 | * and errors on those sockets and cleans-up as they occur. | |
1d4b027a DG |
1529 | */ |
1530 | static void *thread_manage_apps(void *data) | |
099e26bd | 1531 | { |
139ac872 | 1532 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1533 | ssize_t size_ret; |
5eb91c98 | 1534 | uint32_t revents, nb_fd; |
5eb91c98 | 1535 | struct lttng_poll_event events; |
099e26bd DG |
1536 | |
1537 | DBG("[thread] Manage application started"); | |
1538 | ||
f6a9efaa DG |
1539 | rcu_register_thread(); |
1540 | rcu_thread_online(); | |
1541 | ||
6c71277b | 1542 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1543 | |
e547b070 | 1544 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1545 | goto error_testpoint; |
1546 | } | |
1547 | ||
840cb59c | 1548 | health_code_update(); |
44a5e5eb | 1549 | |
d0b96690 | 1550 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1551 | if (ret < 0) { |
76d7553f | 1552 | goto error_poll_create; |
5eb91c98 | 1553 | } |
099e26bd | 1554 | |
5eb91c98 DG |
1555 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1556 | if (ret < 0) { | |
1557 | goto error; | |
1558 | } | |
099e26bd | 1559 | |
e547b070 | 1560 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1561 | goto error; |
1562 | } | |
8ac94142 | 1563 | |
840cb59c | 1564 | health_code_update(); |
44a5e5eb | 1565 | |
5eb91c98 | 1566 | while (1) { |
7fa2082e | 1567 | DBG("Apps thread polling"); |
099e26bd DG |
1568 | |
1569 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1570 | restart: |
a78af745 | 1571 | health_poll_entry(); |
5eb91c98 | 1572 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1573 | DBG("Apps thread return from poll on %d fds", |
1574 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1575 | health_poll_exit(); |
099e26bd | 1576 | if (ret < 0) { |
88f2b785 MD |
1577 | /* |
1578 | * Restart interrupted system call. | |
1579 | */ | |
1580 | if (errno == EINTR) { | |
1581 | goto restart; | |
1582 | } | |
099e26bd DG |
1583 | goto error; |
1584 | } | |
1585 | ||
0d9c5d77 DG |
1586 | nb_fd = ret; |
1587 | ||
5eb91c98 DG |
1588 | for (i = 0; i < nb_fd; i++) { |
1589 | /* Fetch once the poll data */ | |
1590 | revents = LTTNG_POLL_GETEV(&events, i); | |
1591 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1592 | ||
840cb59c | 1593 | health_code_update(); |
44a5e5eb | 1594 | |
fd20dac9 MD |
1595 | if (!revents) { |
1596 | /* No activity for this FD (poll implementation). */ | |
1597 | continue; | |
1598 | } | |
1599 | ||
5eb91c98 | 1600 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1601 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1602 | if (ret) { |
139ac872 MD |
1603 | err = 0; |
1604 | goto exit; | |
5eb91c98 | 1605 | } |
099e26bd | 1606 | |
5eb91c98 DG |
1607 | /* Inspect the apps cmd pipe */ |
1608 | if (pollfd == apps_cmd_pipe[0]) { | |
03e43155 | 1609 | if (revents & LPOLLIN) { |
d0b96690 DG |
1610 | int sock; |
1611 | ||
5eb91c98 | 1612 | /* Empty pipe */ |
6cd525e8 MD |
1613 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1614 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1615 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1616 | goto error; |
1617 | } | |
099e26bd | 1618 | |
840cb59c | 1619 | health_code_update(); |
44a5e5eb | 1620 | |
ffe60014 | 1621 | /* |
03e43155 MD |
1622 | * Since this is a command socket (write then read), |
1623 | * we only monitor the error events of the socket. | |
ffe60014 | 1624 | */ |
d0b96690 DG |
1625 | ret = lttng_poll_add(&events, sock, |
1626 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1627 | if (ret < 0) { | |
5eb91c98 | 1628 | goto error; |
e0c7ec2b | 1629 | } |
acc7b41b | 1630 | |
d0b96690 | 1631 | DBG("Apps with sock %d added to poll set", sock); |
03e43155 MD |
1632 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1633 | ERR("Apps command pipe error"); | |
1634 | goto error; | |
1635 | } else { | |
1636 | ERR("Unknown poll events %u for sock %d", revents, pollfd); | |
1637 | goto error; | |
0177d773 | 1638 | } |
5eb91c98 DG |
1639 | } else { |
1640 | /* | |
54d01ffb DG |
1641 | * At this point, we know that a registered application made |
1642 | * the event at poll_wait. | |
5eb91c98 DG |
1643 | */ |
1644 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1645 | /* Removing from the poll set */ | |
1646 | ret = lttng_poll_del(&events, pollfd); | |
1647 | if (ret < 0) { | |
1648 | goto error; | |
1649 | } | |
099e26bd | 1650 | |
b9d9b220 | 1651 | /* Socket closed on remote end. */ |
56fff090 | 1652 | ust_app_unregister(pollfd); |
03e43155 MD |
1653 | } else { |
1654 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1655 | goto error; | |
5eb91c98 | 1656 | } |
099e26bd | 1657 | } |
44a5e5eb | 1658 | |
840cb59c | 1659 | health_code_update(); |
099e26bd | 1660 | } |
099e26bd DG |
1661 | } |
1662 | ||
139ac872 | 1663 | exit: |
099e26bd | 1664 | error: |
5eb91c98 | 1665 | lttng_poll_clean(&events); |
76d7553f | 1666 | error_poll_create: |
6993eeb3 | 1667 | error_testpoint: |
6620da75 DG |
1668 | utils_close_pipe(apps_cmd_pipe); |
1669 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1670 | ||
1671 | /* | |
1672 | * We don't clean the UST app hash table here since already registered | |
1673 | * applications can still be controlled so let them be until the session | |
1674 | * daemon dies or the applications stop. | |
1675 | */ | |
1676 | ||
139ac872 | 1677 | if (err) { |
840cb59c | 1678 | health_error(); |
139ac872 MD |
1679 | ERR("Health error occurred in %s", __func__); |
1680 | } | |
8782cc74 | 1681 | health_unregister(health_sessiond); |
76d7553f | 1682 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1683 | rcu_thread_offline(); |
1684 | rcu_unregister_thread(); | |
099e26bd DG |
1685 | return NULL; |
1686 | } | |
1687 | ||
d0b96690 | 1688 | /* |
d88aee68 DG |
1689 | * Send a socket to a thread This is called from the dispatch UST registration |
1690 | * thread once all sockets are set for the application. | |
d0b96690 | 1691 | * |
b85dc84c DG |
1692 | * The sock value can be invalid, we don't really care, the thread will handle |
1693 | * it and make the necessary cleanup if so. | |
1694 | * | |
d0b96690 DG |
1695 | * On success, return 0 else a negative value being the errno message of the |
1696 | * write(). | |
1697 | */ | |
d88aee68 | 1698 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1699 | { |
6cd525e8 | 1700 | ssize_t ret; |
d0b96690 | 1701 | |
b85dc84c DG |
1702 | /* |
1703 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1704 | * before calling this function being a shutdown state of the thread. | |
1705 | */ | |
1706 | if (fd < 0) { | |
1707 | ret = -EBADF; | |
1708 | goto error; | |
1709 | } | |
d0b96690 | 1710 | |
6cd525e8 MD |
1711 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1712 | if (ret < sizeof(sock)) { | |
d88aee68 | 1713 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1714 | if (ret < 0) { |
1715 | ret = -errno; | |
1716 | } | |
1717 | goto error; | |
1718 | } | |
1719 | ||
1720 | /* All good. Don't send back the write positive ret value. */ | |
1721 | ret = 0; | |
1722 | error: | |
6cd525e8 | 1723 | return (int) ret; |
d0b96690 DG |
1724 | } |
1725 | ||
f45e313d DG |
1726 | /* |
1727 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1728 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1729 | * notify socket is never received. | |
1730 | */ | |
1731 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1732 | { | |
1733 | int ret, nb_fd = 0, i; | |
1734 | unsigned int fd_added = 0; | |
1735 | struct lttng_poll_event events; | |
1736 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1737 | ||
1738 | assert(wait_queue); | |
1739 | ||
1740 | lttng_poll_init(&events); | |
1741 | ||
1742 | /* Just skip everything for an empty queue. */ | |
1743 | if (!wait_queue->count) { | |
1744 | goto end; | |
1745 | } | |
1746 | ||
1747 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1748 | if (ret < 0) { | |
1749 | goto error_create; | |
1750 | } | |
1751 | ||
1752 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1753 | &wait_queue->head, head) { | |
1754 | assert(wait_node->app); | |
1755 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1756 | LPOLLHUP | LPOLLERR); | |
1757 | if (ret < 0) { | |
1758 | goto error; | |
1759 | } | |
1760 | ||
1761 | fd_added = 1; | |
1762 | } | |
1763 | ||
1764 | if (!fd_added) { | |
1765 | goto end; | |
1766 | } | |
1767 | ||
1768 | /* | |
1769 | * Poll but don't block so we can quickly identify the faulty events and | |
1770 | * clean them afterwards from the wait queue. | |
1771 | */ | |
1772 | ret = lttng_poll_wait(&events, 0); | |
1773 | if (ret < 0) { | |
1774 | goto error; | |
1775 | } | |
1776 | nb_fd = ret; | |
1777 | ||
1778 | for (i = 0; i < nb_fd; i++) { | |
1779 | /* Get faulty FD. */ | |
1780 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1781 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1782 | ||
fd20dac9 MD |
1783 | if (!revents) { |
1784 | /* No activity for this FD (poll implementation). */ | |
1785 | continue; | |
1786 | } | |
1787 | ||
f45e313d DG |
1788 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1789 | &wait_queue->head, head) { | |
1790 | if (pollfd == wait_node->app->sock && | |
1791 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1792 | cds_list_del(&wait_node->head); | |
1793 | wait_queue->count--; | |
1794 | ust_app_destroy(wait_node->app); | |
1795 | free(wait_node); | |
48b40bcf JG |
1796 | /* |
1797 | * Silence warning of use-after-free in | |
1798 | * cds_list_for_each_entry_safe which uses | |
1799 | * __typeof__(*wait_node). | |
1800 | */ | |
1801 | wait_node = NULL; | |
f45e313d | 1802 | break; |
03e43155 MD |
1803 | } else { |
1804 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1805 | goto error; | |
f45e313d DG |
1806 | } |
1807 | } | |
1808 | } | |
1809 | ||
1810 | if (nb_fd > 0) { | |
1811 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1812 | } | |
1813 | ||
1814 | end: | |
1815 | lttng_poll_clean(&events); | |
1816 | return; | |
1817 | ||
1818 | error: | |
1819 | lttng_poll_clean(&events); | |
1820 | error_create: | |
1821 | ERR("Unable to sanitize wait queue"); | |
1822 | return; | |
1823 | } | |
1824 | ||
099e26bd DG |
1825 | /* |
1826 | * Dispatch request from the registration threads to the application | |
1827 | * communication thread. | |
1828 | */ | |
1829 | static void *thread_dispatch_ust_registration(void *data) | |
1830 | { | |
12e2b881 | 1831 | int ret, err = -1; |
8bdee6e2 | 1832 | struct cds_wfcq_node *node; |
099e26bd | 1833 | struct ust_command *ust_cmd = NULL; |
f45e313d DG |
1834 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1835 | struct ust_reg_wait_queue wait_queue = { | |
1836 | .count = 0, | |
1837 | }; | |
d0b96690 | 1838 | |
967e3668 MD |
1839 | rcu_register_thread(); |
1840 | ||
6c71277b | 1841 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1842 | |
9ad42ec1 MD |
1843 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1844 | goto error_testpoint; | |
1845 | } | |
1846 | ||
12e2b881 MD |
1847 | health_code_update(); |
1848 | ||
f45e313d | 1849 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1850 | |
1851 | DBG("[thread] Dispatch UST command started"); | |
1852 | ||
0ed3b1a8 | 1853 | for (;;) { |
12e2b881 MD |
1854 | health_code_update(); |
1855 | ||
099e26bd DG |
1856 | /* Atomically prepare the queue futex */ |
1857 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1858 | ||
0ed3b1a8 MD |
1859 | if (CMM_LOAD_SHARED(dispatch_thread_exit)) { |
1860 | break; | |
1861 | } | |
1862 | ||
099e26bd | 1863 | do { |
d0b96690 | 1864 | struct ust_app *app = NULL; |
7972aab2 | 1865 | ust_cmd = NULL; |
d0b96690 | 1866 | |
f45e313d DG |
1867 | /* |
1868 | * Make sure we don't have node(s) that have hung up before receiving | |
1869 | * the notify socket. This is to clean the list in order to avoid | |
1870 | * memory leaks from notify socket that are never seen. | |
1871 | */ | |
1872 | sanitize_wait_queue(&wait_queue); | |
1873 | ||
12e2b881 | 1874 | health_code_update(); |
099e26bd | 1875 | /* Dequeue command for registration */ |
8bdee6e2 | 1876 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1877 | if (node == NULL) { |
00a17c97 | 1878 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1879 | /* Continue thread execution */ |
1880 | break; | |
1881 | } | |
1882 | ||
1883 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1884 | ||
2f50c8a3 DG |
1885 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1886 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1887 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1888 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1889 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1890 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1891 | |
1892 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1893 | wait_node = zmalloc(sizeof(*wait_node)); | |
1894 | if (!wait_node) { | |
1895 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1896 | ret = close(ust_cmd->sock); |
1897 | if (ret < 0) { | |
1898 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1899 | } | |
51dec90d | 1900 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1901 | free(ust_cmd); |
d0b96690 DG |
1902 | goto error; |
1903 | } | |
1904 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1905 | ||
1906 | /* Create application object if socket is CMD. */ | |
1907 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1908 | ust_cmd->sock); | |
1909 | if (!wait_node->app) { | |
1910 | ret = close(ust_cmd->sock); | |
1911 | if (ret < 0) { | |
1912 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1913 | } |
51dec90d | 1914 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1915 | free(wait_node); |
7972aab2 | 1916 | free(ust_cmd); |
d0b96690 DG |
1917 | continue; |
1918 | } | |
1919 | /* | |
1920 | * Add application to the wait queue so we can set the notify | |
1921 | * socket before putting this object in the global ht. | |
1922 | */ | |
f45e313d DG |
1923 | cds_list_add(&wait_node->head, &wait_queue.head); |
1924 | wait_queue.count++; | |
d0b96690 | 1925 | |
7972aab2 | 1926 | free(ust_cmd); |
d0b96690 DG |
1927 | /* |
1928 | * We have to continue here since we don't have the notify | |
1929 | * socket and the application MUST be added to the hash table | |
1930 | * only at that moment. | |
1931 | */ | |
1932 | continue; | |
1933 | } else { | |
1934 | /* | |
1935 | * Look for the application in the local wait queue and set the | |
1936 | * notify socket if found. | |
1937 | */ | |
d88aee68 | 1938 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1939 | &wait_queue.head, head) { |
12e2b881 | 1940 | health_code_update(); |
d0b96690 DG |
1941 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1942 | wait_node->app->notify_sock = ust_cmd->sock; | |
1943 | cds_list_del(&wait_node->head); | |
f45e313d | 1944 | wait_queue.count--; |
d0b96690 DG |
1945 | app = wait_node->app; |
1946 | free(wait_node); | |
1947 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1948 | break; | |
1949 | } | |
1950 | } | |
020d7f60 DG |
1951 | |
1952 | /* | |
1953 | * With no application at this stage the received socket is | |
1954 | * basically useless so close it before we free the cmd data | |
1955 | * structure for good. | |
1956 | */ | |
1957 | if (!app) { | |
1958 | ret = close(ust_cmd->sock); | |
1959 | if (ret < 0) { | |
1960 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1961 | } | |
51dec90d | 1962 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1963 | } |
7972aab2 | 1964 | free(ust_cmd); |
d0b96690 DG |
1965 | } |
1966 | ||
1967 | if (app) { | |
d0b96690 DG |
1968 | /* |
1969 | * @session_lock_list | |
1970 | * | |
1971 | * Lock the global session list so from the register up to the | |
1972 | * registration done message, no thread can see the application | |
1973 | * and change its state. | |
1974 | */ | |
1975 | session_lock_list(); | |
1976 | rcu_read_lock(); | |
d88aee68 | 1977 | |
d0b96690 DG |
1978 | /* |
1979 | * Add application to the global hash table. This needs to be | |
1980 | * done before the update to the UST registry can locate the | |
1981 | * application. | |
1982 | */ | |
1983 | ust_app_add(app); | |
d88aee68 DG |
1984 | |
1985 | /* Set app version. This call will print an error if needed. */ | |
1986 | (void) ust_app_version(app); | |
1987 | ||
1988 | /* Send notify socket through the notify pipe. */ | |
1989 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1990 | app->notify_sock); | |
1991 | if (ret < 0) { | |
1992 | rcu_read_unlock(); | |
1993 | session_unlock_list(); | |
b85dc84c DG |
1994 | /* |
1995 | * No notify thread, stop the UST tracing. However, this is | |
1996 | * not an internal error of the this thread thus setting | |
1997 | * the health error code to a normal exit. | |
1998 | */ | |
1999 | err = 0; | |
d88aee68 | 2000 | goto error; |
6620da75 | 2001 | } |
d88aee68 | 2002 | |
d0b96690 DG |
2003 | /* |
2004 | * Update newly registered application with the tracing | |
2005 | * registry info already enabled information. | |
2006 | */ | |
2007 | update_ust_app(app->sock); | |
d88aee68 DG |
2008 | |
2009 | /* | |
2010 | * Don't care about return value. Let the manage apps threads | |
2011 | * handle app unregistration upon socket close. | |
2012 | */ | |
fb45065e | 2013 | (void) ust_app_register_done(app); |
d88aee68 DG |
2014 | |
2015 | /* | |
2016 | * Even if the application socket has been closed, send the app | |
2017 | * to the thread and unregistration will take place at that | |
2018 | * place. | |
2019 | */ | |
2020 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 2021 | if (ret < 0) { |
d88aee68 DG |
2022 | rcu_read_unlock(); |
2023 | session_unlock_list(); | |
b85dc84c DG |
2024 | /* |
2025 | * No apps. thread, stop the UST tracing. However, this is | |
2026 | * not an internal error of the this thread thus setting | |
2027 | * the health error code to a normal exit. | |
2028 | */ | |
2029 | err = 0; | |
d88aee68 | 2030 | goto error; |
d0b96690 | 2031 | } |
d88aee68 | 2032 | |
d0b96690 DG |
2033 | rcu_read_unlock(); |
2034 | session_unlock_list(); | |
099e26bd | 2035 | } |
099e26bd DG |
2036 | } while (node != NULL); |
2037 | ||
12e2b881 | 2038 | health_poll_entry(); |
099e26bd DG |
2039 | /* Futex wait on queue. Blocking call on futex() */ |
2040 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 2041 | health_poll_exit(); |
099e26bd | 2042 | } |
12e2b881 MD |
2043 | /* Normal exit, no error */ |
2044 | err = 0; | |
099e26bd DG |
2045 | |
2046 | error: | |
d88aee68 DG |
2047 | /* Clean up wait queue. */ |
2048 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 2049 | &wait_queue.head, head) { |
d88aee68 | 2050 | cds_list_del(&wait_node->head); |
f45e313d | 2051 | wait_queue.count--; |
d88aee68 DG |
2052 | free(wait_node); |
2053 | } | |
2054 | ||
772b8f4d MD |
2055 | /* Empty command queue. */ |
2056 | for (;;) { | |
2057 | /* Dequeue command for registration */ | |
2058 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); | |
2059 | if (node == NULL) { | |
2060 | break; | |
2061 | } | |
2062 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
2063 | ret = close(ust_cmd->sock); | |
2064 | if (ret < 0) { | |
2065 | PERROR("close ust sock exit dispatch %d", ust_cmd->sock); | |
2066 | } | |
2067 | lttng_fd_put(LTTNG_FD_APPS, 1); | |
2068 | free(ust_cmd); | |
2069 | } | |
2070 | ||
9ad42ec1 | 2071 | error_testpoint: |
099e26bd | 2072 | DBG("Dispatch thread dying"); |
12e2b881 MD |
2073 | if (err) { |
2074 | health_error(); | |
2075 | ERR("Health error occurred in %s", __func__); | |
2076 | } | |
8782cc74 | 2077 | health_unregister(health_sessiond); |
967e3668 | 2078 | rcu_unregister_thread(); |
099e26bd DG |
2079 | return NULL; |
2080 | } | |
2081 | ||
2082 | /* | |
2083 | * This thread manage application registration. | |
2084 | */ | |
2085 | static void *thread_registration_apps(void *data) | |
1d4b027a | 2086 | { |
139ac872 | 2087 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
2088 | uint32_t revents, nb_fd; |
2089 | struct lttng_poll_event events; | |
099e26bd DG |
2090 | /* |
2091 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
2092 | * freed in the manage apps thread. | |
2093 | */ | |
2094 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 2095 | |
099e26bd | 2096 | DBG("[thread] Manage application registration started"); |
1d4b027a | 2097 | |
6c71277b | 2098 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 2099 | |
e547b070 | 2100 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
2101 | goto error_testpoint; |
2102 | } | |
8ac94142 | 2103 | |
1d4b027a DG |
2104 | ret = lttcomm_listen_unix_sock(apps_sock); |
2105 | if (ret < 0) { | |
76d7553f | 2106 | goto error_listen; |
1d4b027a DG |
2107 | } |
2108 | ||
5eb91c98 DG |
2109 | /* |
2110 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
2111 | * more will be added to this poll set. | |
2112 | */ | |
d0b96690 | 2113 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 2114 | if (ret < 0) { |
76d7553f | 2115 | goto error_create_poll; |
5eb91c98 | 2116 | } |
273ea72c | 2117 | |
5eb91c98 DG |
2118 | /* Add the application registration socket */ |
2119 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
2120 | if (ret < 0) { | |
76d7553f | 2121 | goto error_poll_add; |
5eb91c98 | 2122 | } |
273ea72c | 2123 | |
1d4b027a | 2124 | /* Notify all applications to register */ |
0fdd1e2c DG |
2125 | ret = notify_ust_apps(1); |
2126 | if (ret < 0) { | |
2127 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
2128 | "Execution continues but there might be problem for already\n" |
2129 | "running applications that wishes to register."); | |
0fdd1e2c | 2130 | } |
1d4b027a DG |
2131 | |
2132 | while (1) { | |
2133 | DBG("Accepting application registration"); | |
273ea72c DG |
2134 | |
2135 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 2136 | restart: |
a78af745 | 2137 | health_poll_entry(); |
5eb91c98 | 2138 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 2139 | health_poll_exit(); |
273ea72c | 2140 | if (ret < 0) { |
88f2b785 MD |
2141 | /* |
2142 | * Restart interrupted system call. | |
2143 | */ | |
2144 | if (errno == EINTR) { | |
2145 | goto restart; | |
2146 | } | |
273ea72c DG |
2147 | goto error; |
2148 | } | |
2149 | ||
0d9c5d77 DG |
2150 | nb_fd = ret; |
2151 | ||
5eb91c98 | 2152 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 2153 | health_code_update(); |
139ac872 | 2154 | |
5eb91c98 DG |
2155 | /* Fetch once the poll data */ |
2156 | revents = LTTNG_POLL_GETEV(&events, i); | |
2157 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 2158 | |
fd20dac9 MD |
2159 | if (!revents) { |
2160 | /* No activity for this FD (poll implementation). */ | |
2161 | continue; | |
2162 | } | |
2163 | ||
5eb91c98 | 2164 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 2165 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 2166 | if (ret) { |
139ac872 MD |
2167 | err = 0; |
2168 | goto exit; | |
90014c57 | 2169 | } |
1d4b027a | 2170 | |
5eb91c98 DG |
2171 | /* Event on the registration socket */ |
2172 | if (pollfd == apps_sock) { | |
03e43155 | 2173 | if (revents & LPOLLIN) { |
5eb91c98 DG |
2174 | sock = lttcomm_accept_unix_sock(apps_sock); |
2175 | if (sock < 0) { | |
2176 | goto error; | |
2177 | } | |
099e26bd | 2178 | |
16c5c8fa DG |
2179 | /* |
2180 | * Set socket timeout for both receiving and ending. | |
2181 | * app_socket_timeout is in seconds, whereas | |
2182 | * lttcomm_setsockopt_rcv_timeout and | |
2183 | * lttcomm_setsockopt_snd_timeout expect msec as | |
2184 | * parameter. | |
2185 | */ | |
e6142f2e | 2186 | if (config.app_socket_timeout >= 0) { |
28ce0ff2 | 2187 | (void) lttcomm_setsockopt_rcv_timeout(sock, |
e6142f2e | 2188 | config.app_socket_timeout * 1000); |
28ce0ff2 | 2189 | (void) lttcomm_setsockopt_snd_timeout(sock, |
e6142f2e | 2190 | config.app_socket_timeout * 1000); |
28ce0ff2 | 2191 | } |
16c5c8fa | 2192 | |
b662582b DG |
2193 | /* |
2194 | * Set the CLOEXEC flag. Return code is useless because | |
2195 | * either way, the show must go on. | |
2196 | */ | |
2197 | (void) utils_set_fd_cloexec(sock); | |
2198 | ||
5eb91c98 | 2199 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 2200 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 2201 | if (ust_cmd == NULL) { |
76d7553f | 2202 | PERROR("ust command zmalloc"); |
41ed8e47 MD |
2203 | ret = close(sock); |
2204 | if (ret) { | |
2205 | PERROR("close"); | |
2206 | } | |
5eb91c98 DG |
2207 | goto error; |
2208 | } | |
1d4b027a | 2209 | |
5eb91c98 DG |
2210 | /* |
2211 | * Using message-based transmissions to ensure we don't | |
2212 | * have to deal with partially received messages. | |
2213 | */ | |
4063050c MD |
2214 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
2215 | if (ret < 0) { | |
2216 | ERR("Exhausted file descriptors allowed for applications."); | |
2217 | free(ust_cmd); | |
2218 | ret = close(sock); | |
2219 | if (ret) { | |
2220 | PERROR("close"); | |
2221 | } | |
2222 | sock = -1; | |
2223 | continue; | |
2224 | } | |
d88aee68 | 2225 | |
840cb59c | 2226 | health_code_update(); |
d0b96690 DG |
2227 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
2228 | if (ret < 0) { | |
5eb91c98 | 2229 | free(ust_cmd); |
d0b96690 | 2230 | /* Close socket of the application. */ |
76d7553f MD |
2231 | ret = close(sock); |
2232 | if (ret) { | |
2233 | PERROR("close"); | |
2234 | } | |
4063050c | 2235 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 2236 | sock = -1; |
5eb91c98 DG |
2237 | continue; |
2238 | } | |
840cb59c | 2239 | health_code_update(); |
099e26bd | 2240 | |
5eb91c98 | 2241 | ust_cmd->sock = sock; |
34a2494f | 2242 | sock = -1; |
099e26bd | 2243 | |
5eb91c98 DG |
2244 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2245 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2246 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2247 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2248 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2249 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2250 | |
5eb91c98 DG |
2251 | /* |
2252 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2253 | * has been taken! This apps will be part of the *system*. |
5eb91c98 | 2254 | */ |
8bdee6e2 | 2255 | cds_wfcq_enqueue(&ust_cmd_queue.head, &ust_cmd_queue.tail, &ust_cmd->node); |
5eb91c98 DG |
2256 | |
2257 | /* | |
2258 | * Wake the registration queue futex. Implicit memory | |
8bdee6e2 | 2259 | * barrier with the exchange in cds_wfcq_enqueue. |
5eb91c98 DG |
2260 | */ |
2261 | futex_nto1_wake(&ust_cmd_queue.futex); | |
03e43155 MD |
2262 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2263 | ERR("Register apps socket poll error"); | |
2264 | goto error; | |
2265 | } else { | |
2266 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2267 | goto error; | |
5eb91c98 DG |
2268 | } |
2269 | } | |
90014c57 | 2270 | } |
1d4b027a DG |
2271 | } |
2272 | ||
139ac872 | 2273 | exit: |
1d4b027a | 2274 | error: |
0fdd1e2c DG |
2275 | /* Notify that the registration thread is gone */ |
2276 | notify_ust_apps(0); | |
2277 | ||
a4b35e07 | 2278 | if (apps_sock >= 0) { |
76d7553f MD |
2279 | ret = close(apps_sock); |
2280 | if (ret) { | |
2281 | PERROR("close"); | |
2282 | } | |
a4b35e07 | 2283 | } |
46c3f085 | 2284 | if (sock >= 0) { |
76d7553f MD |
2285 | ret = close(sock); |
2286 | if (ret) { | |
2287 | PERROR("close"); | |
2288 | } | |
4063050c | 2289 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2290 | } |
e6142f2e | 2291 | unlink(config.apps_unix_sock_path.value); |
0fdd1e2c | 2292 | |
76d7553f | 2293 | error_poll_add: |
5eb91c98 | 2294 | lttng_poll_clean(&events); |
76d7553f MD |
2295 | error_listen: |
2296 | error_create_poll: | |
6993eeb3 | 2297 | error_testpoint: |
76d7553f | 2298 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2299 | if (err) { |
2300 | health_error(); | |
2301 | ERR("Health error occurred in %s", __func__); | |
2302 | } | |
8782cc74 | 2303 | health_unregister(health_sessiond); |
5eb91c98 | 2304 | |
1d4b027a DG |
2305 | return NULL; |
2306 | } | |
2307 | ||
8c0faa1d | 2308 | /* |
3bd1e081 | 2309 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2310 | * exec or it will fails. |
8c0faa1d | 2311 | */ |
3bd1e081 | 2312 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2313 | { |
a23ec3a7 | 2314 | int ret, clock_ret; |
ee0b0061 DG |
2315 | struct timespec timeout; |
2316 | ||
13a7bce3 JG |
2317 | /* |
2318 | * Make sure we set the readiness flag to 0 because we are NOT ready. | |
2319 | * This access to consumer_thread_is_ready does not need to be | |
2320 | * protected by consumer_data.cond_mutex (yet) since the consumer | |
2321 | * management thread has not been started at this point. | |
2322 | */ | |
a23ec3a7 | 2323 | consumer_data->consumer_thread_is_ready = 0; |
8c0faa1d | 2324 | |
a23ec3a7 DG |
2325 | /* Setup pthread condition */ |
2326 | ret = pthread_condattr_init(&consumer_data->condattr); | |
4a15001e | 2327 | if (ret) { |
a23ec3a7 DG |
2328 | errno = ret; |
2329 | PERROR("pthread_condattr_init consumer data"); | |
2330 | goto error; | |
2331 | } | |
2332 | ||
2333 | /* | |
2334 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2335 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2336 | * for a more details and how we noticed it. | |
2337 | */ | |
2338 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
4a15001e | 2339 | if (ret) { |
a23ec3a7 DG |
2340 | errno = ret; |
2341 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2342 | goto error; |
2343 | } | |
8c0faa1d | 2344 | |
a23ec3a7 | 2345 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
4a15001e | 2346 | if (ret) { |
a23ec3a7 DG |
2347 | errno = ret; |
2348 | PERROR("pthread_cond_init consumer data"); | |
2349 | goto error; | |
2350 | } | |
2351 | ||
1a1a34b4 MJ |
2352 | ret = pthread_create(&consumer_data->thread, default_pthread_attr(), |
2353 | thread_manage_consumer, consumer_data); | |
4a15001e MD |
2354 | if (ret) { |
2355 | errno = ret; | |
3bd1e081 | 2356 | PERROR("pthread_create consumer"); |
ee0b0061 | 2357 | ret = -1; |
8c0faa1d DG |
2358 | goto error; |
2359 | } | |
2360 | ||
a23ec3a7 DG |
2361 | /* We are about to wait on a pthread condition */ |
2362 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2363 | ||
ee0b0061 | 2364 | /* Get time for sem_timedwait absolute timeout */ |
389fbf04 | 2365 | clock_ret = lttng_clock_gettime(CLOCK_MONOTONIC, &timeout); |
a23ec3a7 DG |
2366 | /* |
2367 | * Set the timeout for the condition timed wait even if the clock gettime | |
2368 | * call fails since we might loop on that call and we want to avoid to | |
2369 | * increment the timeout too many times. | |
2370 | */ | |
2371 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2372 | ||
2373 | /* | |
2374 | * The following loop COULD be skipped in some conditions so this is why we | |
2375 | * set ret to 0 in order to make sure at least one round of the loop is | |
2376 | * done. | |
2377 | */ | |
2378 | ret = 0; | |
2379 | ||
2380 | /* | |
2381 | * Loop until the condition is reached or when a timeout is reached. Note | |
2382 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2383 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2384 | * possible. This loop does not take any chances and works with both of | |
2385 | * them. | |
2386 | */ | |
2387 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2388 | if (clock_ret < 0) { | |
2389 | PERROR("clock_gettime spawn consumer"); | |
2390 | /* Infinite wait for the consumerd thread to be ready */ | |
2391 | ret = pthread_cond_wait(&consumer_data->cond, | |
2392 | &consumer_data->cond_mutex); | |
2393 | } else { | |
2394 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2395 | &consumer_data->cond_mutex, &timeout); | |
2396 | } | |
ee0b0061 | 2397 | } |
8c0faa1d | 2398 | |
a23ec3a7 DG |
2399 | /* Release the pthread condition */ |
2400 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2401 | ||
2402 | if (ret != 0) { | |
2403 | errno = ret; | |
2404 | if (ret == ETIMEDOUT) { | |
4282f9a3 DG |
2405 | int pth_ret; |
2406 | ||
ee0b0061 DG |
2407 | /* |
2408 | * Call has timed out so we kill the kconsumerd_thread and return | |
2409 | * an error. | |
2410 | */ | |
a23ec3a7 DG |
2411 | ERR("Condition timed out. The consumer thread was never ready." |
2412 | " Killing it"); | |
4282f9a3 DG |
2413 | pth_ret = pthread_cancel(consumer_data->thread); |
2414 | if (pth_ret < 0) { | |
3bd1e081 | 2415 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2416 | } |
2417 | } else { | |
a23ec3a7 | 2418 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 | 2419 | } |
4282f9a3 DG |
2420 | /* Caller is expecting a negative value on failure. */ |
2421 | ret = -1; | |
ee0b0061 DG |
2422 | goto error; |
2423 | } | |
2424 | ||
3bd1e081 MD |
2425 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2426 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2427 | ERR("Consumerd did not start"); |
3bd1e081 | 2428 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2429 | goto error; |
2430 | } | |
3bd1e081 | 2431 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2432 | |
8c0faa1d DG |
2433 | return 0; |
2434 | ||
2435 | error: | |
2436 | return ret; | |
2437 | } | |
2438 | ||
d9800920 | 2439 | /* |
3bd1e081 | 2440 | * Join consumer thread |
d9800920 | 2441 | */ |
3bd1e081 | 2442 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2443 | { |
2444 | void *status; | |
cf3af59e | 2445 | |
e8209f6b DG |
2446 | /* Consumer pid must be a real one. */ |
2447 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2448 | int ret; |
3bd1e081 | 2449 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2450 | if (ret) { |
4a15001e | 2451 | PERROR("Error killing consumer daemon"); |
cf3af59e MD |
2452 | return ret; |
2453 | } | |
3bd1e081 | 2454 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2455 | } else { |
2456 | return 0; | |
2457 | } | |
2458 | } | |
2459 | ||
8c0faa1d | 2460 | /* |
3bd1e081 | 2461 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2462 | * |
d063d709 | 2463 | * Return pid if successful else -1. |
8c0faa1d | 2464 | */ |
3bd1e081 | 2465 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2466 | { |
2467 | int ret; | |
2468 | pid_t pid; | |
94c55f17 | 2469 | const char *consumer_to_use; |
53086306 | 2470 | const char *verbosity; |
94c55f17 | 2471 | struct stat st; |
8c0faa1d | 2472 | |
3bd1e081 | 2473 | DBG("Spawning consumerd"); |
c49dc785 | 2474 | |
8c0faa1d DG |
2475 | pid = fork(); |
2476 | if (pid == 0) { | |
2477 | /* | |
3bd1e081 | 2478 | * Exec consumerd. |
8c0faa1d | 2479 | */ |
e6142f2e | 2480 | if (config.verbose_consumer) { |
53086306 | 2481 | verbosity = "--verbose"; |
4421f712 | 2482 | } else if (lttng_opt_quiet) { |
53086306 | 2483 | verbosity = "--quiet"; |
4421f712 DG |
2484 | } else { |
2485 | verbosity = ""; | |
53086306 | 2486 | } |
4421f712 | 2487 | |
3bd1e081 MD |
2488 | switch (consumer_data->type) { |
2489 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2490 | /* |
c7704d57 DG |
2491 | * Find out which consumerd to execute. We will first try the |
2492 | * 64-bit path, then the sessiond's installation directory, and | |
2493 | * fallback on the 32-bit one, | |
94c55f17 | 2494 | */ |
63a799e8 | 2495 | DBG3("Looking for a kernel consumer at these locations:"); |
59ee5091 | 2496 | DBG3(" 1) %s", config.consumerd64_bin_path.value ? : "NULL"); |
e6142f2e | 2497 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, DEFAULT_CONSUMERD_FILE); |
59ee5091 | 2498 | DBG3(" 3) %s", config.consumerd32_bin_path.value ? : "NULL"); |
e6142f2e | 2499 | if (stat(config.consumerd64_bin_path.value, &st) == 0) { |
63a799e8 | 2500 | DBG3("Found location #1"); |
e6142f2e JG |
2501 | consumer_to_use = config.consumerd64_bin_path.value; |
2502 | } else if (stat(INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE, &st) == 0) { | |
63a799e8 | 2503 | DBG3("Found location #2"); |
e6142f2e | 2504 | consumer_to_use = INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE; |
a1a9f823 JG |
2505 | } else if (config.consumerd32_bin_path.value && |
2506 | stat(config.consumerd32_bin_path.value, &st) == 0) { | |
63a799e8 | 2507 | DBG3("Found location #3"); |
e6142f2e | 2508 | consumer_to_use = config.consumerd32_bin_path.value; |
94c55f17 | 2509 | } else { |
63a799e8 | 2510 | DBG("Could not find any valid consumerd executable"); |
4282f9a3 | 2511 | ret = -EINVAL; |
3d678709 | 2512 | goto error; |
94c55f17 AM |
2513 | } |
2514 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
6e2cc8d8 | 2515 | (void) execl(consumer_to_use, |
94c55f17 AM |
2516 | "lttng-consumerd", verbosity, "-k", |
2517 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2518 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
e6142f2e | 2519 | "--group", config.tracing_group_name.value, |
94c55f17 | 2520 | NULL); |
3bd1e081 | 2521 | break; |
7753dea8 MD |
2522 | case LTTNG_CONSUMER64_UST: |
2523 | { | |
46b23495 | 2524 | if (config.consumerd64_lib_dir.value) { |
8f4905da MD |
2525 | char *tmp; |
2526 | size_t tmplen; | |
ddaec4a2 | 2527 | char *tmpnew; |
8f4905da | 2528 | |
e8fa9fb0 | 2529 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2530 | if (!tmp) { |
2531 | tmp = ""; | |
2532 | } | |
d222983e | 2533 | tmplen = strlen(config.consumerd64_lib_dir.value) + 1 /* : */ + strlen(tmp); |
8f4905da MD |
2534 | tmpnew = zmalloc(tmplen + 1 /* \0 */); |
2535 | if (!tmpnew) { | |
2536 | ret = -ENOMEM; | |
2537 | goto error; | |
2538 | } | |
e6142f2e | 2539 | strcat(tmpnew, config.consumerd64_lib_dir.value); |
8f4905da MD |
2540 | if (tmp[0] != '\0') { |
2541 | strcat(tmpnew, ":"); | |
2542 | strcat(tmpnew, tmp); | |
2543 | } | |
d222983e | 2544 | ret = setenv("LD_LIBRARY_PATH", tmpnew, 1); |
ddaec4a2 | 2545 | free(tmpnew); |
8f4905da MD |
2546 | if (ret) { |
2547 | ret = -errno; | |
2548 | goto error; | |
2549 | } | |
2550 | } | |
e6142f2e JG |
2551 | DBG("Using 64-bit UST consumer at: %s", config.consumerd64_bin_path.value); |
2552 | (void) execl(config.consumerd64_bin_path.value, "lttng-consumerd", verbosity, "-u", | |
7753dea8 MD |
2553 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2554 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
e6142f2e | 2555 | "--group", config.tracing_group_name.value, |
7753dea8 | 2556 | NULL); |
3bd1e081 | 2557 | break; |
7753dea8 MD |
2558 | } |
2559 | case LTTNG_CONSUMER32_UST: | |
2560 | { | |
46b23495 | 2561 | if (config.consumerd32_lib_dir.value) { |
8f4905da MD |
2562 | char *tmp; |
2563 | size_t tmplen; | |
ddaec4a2 | 2564 | char *tmpnew; |
8f4905da | 2565 | |
e8fa9fb0 | 2566 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2567 | if (!tmp) { |
2568 | tmp = ""; | |
2569 | } | |
d222983e | 2570 | tmplen = strlen(config.consumerd32_lib_dir.value) + 1 /* : */ + strlen(tmp); |
8f4905da MD |
2571 | tmpnew = zmalloc(tmplen + 1 /* \0 */); |
2572 | if (!tmpnew) { | |
2573 | ret = -ENOMEM; | |
2574 | goto error; | |
2575 | } | |
e6142f2e | 2576 | strcat(tmpnew, config.consumerd32_lib_dir.value); |
8f4905da MD |
2577 | if (tmp[0] != '\0') { |
2578 | strcat(tmpnew, ":"); | |
2579 | strcat(tmpnew, tmp); | |
2580 | } | |
d222983e | 2581 | ret = setenv("LD_LIBRARY_PATH", tmpnew, 1); |
ddaec4a2 | 2582 | free(tmpnew); |
8f4905da MD |
2583 | if (ret) { |
2584 | ret = -errno; | |
2585 | goto error; | |
2586 | } | |
2587 | } | |
e6142f2e JG |
2588 | DBG("Using 32-bit UST consumer at: %s", config.consumerd32_bin_path.value); |
2589 | (void) execl(config.consumerd32_bin_path.value, "lttng-consumerd", verbosity, "-u", | |
7753dea8 MD |
2590 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2591 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
e6142f2e | 2592 | "--group", config.tracing_group_name.value, |
7753dea8 MD |
2593 | NULL); |
2594 | break; | |
2595 | } | |
3bd1e081 | 2596 | default: |
b60e7183 | 2597 | ERR("unknown consumer type"); |
e9d6b496 | 2598 | errno = 0; |
3bd1e081 | 2599 | } |
8c0faa1d | 2600 | if (errno != 0) { |
4282f9a3 | 2601 | PERROR("Consumer execl()"); |
8c0faa1d | 2602 | } |
4282f9a3 | 2603 | /* Reaching this point, we got a failure on our execl(). */ |
8c0faa1d DG |
2604 | exit(EXIT_FAILURE); |
2605 | } else if (pid > 0) { | |
2606 | ret = pid; | |
8c0faa1d | 2607 | } else { |
76d7553f | 2608 | PERROR("start consumer fork"); |
8c0faa1d | 2609 | ret = -errno; |
8c0faa1d | 2610 | } |
8f4905da | 2611 | error: |
8c0faa1d DG |
2612 | return ret; |
2613 | } | |
2614 | ||
693bd40b | 2615 | /* |
3bd1e081 | 2616 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2617 | */ |
3bd1e081 | 2618 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2619 | { |
c617c0c6 | 2620 | int ret; |
edb8b045 DG |
2621 | |
2622 | /* | |
2623 | * Set the listen() state on the socket since there is a possible race | |
2624 | * between the exec() of the consumer daemon and this call if place in the | |
2625 | * consumer thread. See bug #366 for more details. | |
2626 | */ | |
2627 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2628 | if (ret < 0) { | |
2629 | goto error; | |
2630 | } | |
693bd40b | 2631 | |
3bd1e081 MD |
2632 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2633 | if (consumer_data->pid != 0) { | |
2634 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2635 | goto end; |
2636 | } | |
693bd40b | 2637 | |
3bd1e081 | 2638 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2639 | if (ret < 0) { |
3bd1e081 MD |
2640 | ERR("Spawning consumerd failed"); |
2641 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2642 | goto error; |
693bd40b | 2643 | } |
c49dc785 | 2644 | |
3bd1e081 MD |
2645 | /* Setting up the consumer_data pid */ |
2646 | consumer_data->pid = ret; | |
48842b30 | 2647 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2648 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2649 | |
3bd1e081 MD |
2650 | DBG2("Spawning consumer control thread"); |
2651 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2652 | if (ret < 0) { |
3bd1e081 | 2653 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2654 | goto error; |
2655 | } | |
2656 | ||
c49dc785 | 2657 | end: |
693bd40b DG |
2658 | return 0; |
2659 | ||
2660 | error: | |
331744e3 | 2661 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2662 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2663 | int err; |
2664 | ||
edb8b045 DG |
2665 | err = close(consumer_data->err_sock); |
2666 | if (err < 0) { | |
2667 | PERROR("close consumer data error socket"); | |
2668 | } | |
2669 | } | |
693bd40b DG |
2670 | return ret; |
2671 | } | |
2672 | ||
b73401da | 2673 | /* |
096102bd | 2674 | * Setup necessary data for kernel tracer action. |
b73401da | 2675 | */ |
096102bd | 2676 | static int init_kernel_tracer(void) |
b73401da DG |
2677 | { |
2678 | int ret; | |
b73401da | 2679 | |
096102bd DG |
2680 | /* Modprobe lttng kernel modules */ |
2681 | ret = modprobe_lttng_control(); | |
b73401da | 2682 | if (ret < 0) { |
b73401da DG |
2683 | goto error; |
2684 | } | |
2685 | ||
096102bd DG |
2686 | /* Open debugfs lttng */ |
2687 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2688 | if (kernel_tracer_fd < 0) { | |
2689 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b | 2690 | goto error_open; |
54d01ffb DG |
2691 | } |
2692 | ||
2f77fc4b | 2693 | /* Validate kernel version */ |
88076e89 JD |
2694 | ret = kernel_validate_version(kernel_tracer_fd, &kernel_tracer_version, |
2695 | &kernel_tracer_abi_version); | |
2f77fc4b DG |
2696 | if (ret < 0) { |
2697 | goto error_version; | |
b551a063 | 2698 | } |
54d01ffb | 2699 | |
2f77fc4b DG |
2700 | ret = modprobe_lttng_data(); |
2701 | if (ret < 0) { | |
2702 | goto error_modules; | |
54d01ffb DG |
2703 | } |
2704 | ||
6e21424e JR |
2705 | ret = kernel_supports_ring_buffer_snapshot_sample_positions( |
2706 | kernel_tracer_fd); | |
2707 | if (ret < 0) { | |
2708 | goto error_modules; | |
2709 | } | |
2710 | ||
2711 | if (ret < 1) { | |
2712 | WARN("Kernel tracer does not support buffer monitoring. " | |
2713 | "The monitoring timer of channels in the kernel domain " | |
2714 | "will be set to 0 (disabled)."); | |
2715 | } | |
2716 | ||
2f77fc4b DG |
2717 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2718 | return 0; | |
2719 | ||
2720 | error_version: | |
2721 | modprobe_remove_lttng_control(); | |
2722 | ret = close(kernel_tracer_fd); | |
2723 | if (ret) { | |
2724 | PERROR("close"); | |
b551a063 | 2725 | } |
2f77fc4b | 2726 | kernel_tracer_fd = -1; |
f73fabfd | 2727 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2728 | |
2f77fc4b DG |
2729 | error_modules: |
2730 | ret = close(kernel_tracer_fd); | |
2731 | if (ret) { | |
2732 | PERROR("close"); | |
b551a063 | 2733 | } |
54d01ffb | 2734 | |
2f77fc4b DG |
2735 | error_open: |
2736 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2737 | |
2738 | error: | |
2f77fc4b DG |
2739 | WARN("No kernel tracer available"); |
2740 | kernel_tracer_fd = -1; | |
2741 | if (!is_root) { | |
f73fabfd | 2742 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2743 | } else { |
f73fabfd | 2744 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2745 | } |
54d01ffb DG |
2746 | } |
2747 | ||
2f77fc4b | 2748 | |
54d01ffb | 2749 | /* |
2f77fc4b DG |
2750 | * Copy consumer output from the tracing session to the domain session. The |
2751 | * function also applies the right modification on a per domain basis for the | |
2752 | * trace files destination directory. | |
36b588ed MD |
2753 | * |
2754 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2755 | */ |
2f77fc4b | 2756 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2757 | { |
2758 | int ret; | |
2f77fc4b DG |
2759 | const char *dir_name; |
2760 | struct consumer_output *consumer; | |
2761 | ||
2762 | assert(session); | |
2763 | assert(session->consumer); | |
54d01ffb | 2764 | |
b551a063 DG |
2765 | switch (domain) { |
2766 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2767 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2768 | /* |
2769 | * XXX: We should audit the session creation and what this function | |
2770 | * does "extra" in order to avoid a destroy since this function is used | |
2771 | * in the domain session creation (kernel and ust) only. Same for UST | |
2772 | * domain. | |
2773 | */ | |
2774 | if (session->kernel_session->consumer) { | |
6addfa37 | 2775 | consumer_output_put(session->kernel_session->consumer); |
09a90bcd | 2776 | } |
2f77fc4b DG |
2777 | session->kernel_session->consumer = |
2778 | consumer_copy_output(session->consumer); | |
2779 | /* Ease our life a bit for the next part */ | |
2780 | consumer = session->kernel_session->consumer; | |
2781 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2782 | break; |
f20baf8e | 2783 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2784 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2785 | case LTTNG_DOMAIN_PYTHON: |
b551a063 | 2786 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2787 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd | 2788 | if (session->ust_session->consumer) { |
6addfa37 | 2789 | consumer_output_put(session->ust_session->consumer); |
09a90bcd | 2790 | } |
2f77fc4b DG |
2791 | session->ust_session->consumer = |
2792 | consumer_copy_output(session->consumer); | |
2793 | /* Ease our life a bit for the next part */ | |
2794 | consumer = session->ust_session->consumer; | |
2795 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2796 | break; |
2797 | default: | |
f73fabfd | 2798 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2799 | goto error; |
2800 | } | |
2801 | ||
2f77fc4b | 2802 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2803 | strncat(consumer->subdir, dir_name, |
2804 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2805 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2806 | ||
f73fabfd | 2807 | ret = LTTNG_OK; |
54d01ffb DG |
2808 | |
2809 | error: | |
2810 | return ret; | |
2811 | } | |
2812 | ||
00e2e675 | 2813 | /* |
2f77fc4b | 2814 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2815 | * |
2816 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2817 | */ |
2f77fc4b DG |
2818 | static int create_ust_session(struct ltt_session *session, |
2819 | struct lttng_domain *domain) | |
00e2e675 DG |
2820 | { |
2821 | int ret; | |
2f77fc4b | 2822 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2823 | |
a4b92340 | 2824 | assert(session); |
2f77fc4b DG |
2825 | assert(domain); |
2826 | assert(session->consumer); | |
a4b92340 | 2827 | |
2f77fc4b | 2828 | switch (domain->type) { |
f20baf8e | 2829 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2830 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2831 | case LTTNG_DOMAIN_PYTHON: |
2f77fc4b DG |
2832 | case LTTNG_DOMAIN_UST: |
2833 | break; | |
2834 | default: | |
2835 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2836 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2837 | goto error; |
2838 | } | |
2839 | ||
2f77fc4b DG |
2840 | DBG("Creating UST session"); |
2841 | ||
dec56f6c | 2842 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2843 | if (lus == NULL) { |
f73fabfd | 2844 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2845 | goto error; |
2846 | } | |
2847 | ||
2f77fc4b DG |
2848 | lus->uid = session->uid; |
2849 | lus->gid = session->gid; | |
2bba9e53 | 2850 | lus->output_traces = session->output_traces; |
27babd3a | 2851 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2852 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2853 | session->ust_session = lus; |
d7ba1388 | 2854 | if (session->shm_path[0]) { |
3d071855 MD |
2855 | strncpy(lus->root_shm_path, session->shm_path, |
2856 | sizeof(lus->root_shm_path)); | |
2857 | lus->root_shm_path[sizeof(lus->root_shm_path) - 1] = '\0'; | |
d7ba1388 MD |
2858 | strncpy(lus->shm_path, session->shm_path, |
2859 | sizeof(lus->shm_path)); | |
2860 | lus->shm_path[sizeof(lus->shm_path) - 1] = '\0'; | |
2861 | strncat(lus->shm_path, "/ust", | |
2862 | sizeof(lus->shm_path) - strlen(lus->shm_path) - 1); | |
2863 | } | |
2f77fc4b DG |
2864 | /* Copy session output to the newly created UST session */ |
2865 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2866 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2867 | goto error; |
2868 | } | |
2869 | ||
f73fabfd | 2870 | return LTTNG_OK; |
00e2e675 DG |
2871 | |
2872 | error: | |
2f77fc4b DG |
2873 | free(lus); |
2874 | session->ust_session = NULL; | |
00e2e675 DG |
2875 | return ret; |
2876 | } | |
2877 | ||
2878 | /* | |
2f77fc4b | 2879 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2880 | */ |
2f77fc4b | 2881 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2882 | { |
2883 | int ret; | |
a4b92340 | 2884 | |
2f77fc4b | 2885 | DBG("Creating kernel session"); |
00e2e675 | 2886 | |
2f77fc4b DG |
2887 | ret = kernel_create_session(session, kernel_tracer_fd); |
2888 | if (ret < 0) { | |
f73fabfd | 2889 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2890 | goto error; |
2891 | } | |
2892 | ||
2f77fc4b DG |
2893 | /* Code flow safety */ |
2894 | assert(session->kernel_session); | |
2895 | ||
2896 | /* Copy session output to the newly created Kernel session */ | |
2897 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2898 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2899 | goto error; |
2900 | } | |
2901 | ||
2f77fc4b DG |
2902 | session->kernel_session->uid = session->uid; |
2903 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2904 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2905 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2906 | |
f73fabfd | 2907 | return LTTNG_OK; |
00e2e675 | 2908 | |
2f77fc4b DG |
2909 | error: |
2910 | trace_kernel_destroy_session(session->kernel_session); | |
2911 | session->kernel_session = NULL; | |
2912 | return ret; | |
2913 | } | |
00e2e675 | 2914 | |
2f77fc4b DG |
2915 | /* |
2916 | * Count number of session permitted by uid/gid. | |
2917 | */ | |
2918 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2919 | { | |
2920 | unsigned int i = 0; | |
2921 | struct ltt_session *session; | |
07424f16 | 2922 | |
2f77fc4b DG |
2923 | DBG("Counting number of available session for UID %d GID %d", |
2924 | uid, gid); | |
2925 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2926 | /* |
2f77fc4b | 2927 | * Only list the sessions the user can control. |
00e2e675 | 2928 | */ |
2f77fc4b DG |
2929 | if (!session_access_ok(session, uid, gid)) { |
2930 | continue; | |
2931 | } | |
2932 | i++; | |
a4b92340 | 2933 | } |
2f77fc4b | 2934 | return i; |
00e2e675 DG |
2935 | } |
2936 | ||
dcabc190 FD |
2937 | static int receive_userspace_probe(struct command_ctx *cmd_ctx, int sock, |
2938 | int *sock_error, struct lttng_event *event) | |
2939 | { | |
2940 | int fd, ret; | |
2941 | struct lttng_userspace_probe_location *probe_location; | |
87597c2c | 2942 | const struct lttng_userspace_probe_location_lookup_method *lookup = NULL; |
dcabc190 FD |
2943 | struct lttng_dynamic_buffer probe_location_buffer; |
2944 | struct lttng_buffer_view buffer_view; | |
2945 | ||
2946 | /* | |
2947 | * Create a buffer to store the serialized version of the probe | |
2948 | * location. | |
2949 | */ | |
2950 | lttng_dynamic_buffer_init(&probe_location_buffer); | |
2951 | ret = lttng_dynamic_buffer_set_size(&probe_location_buffer, | |
2952 | cmd_ctx->lsm->u.enable.userspace_probe_location_len); | |
2953 | if (ret) { | |
2954 | ret = LTTNG_ERR_NOMEM; | |
2955 | goto error; | |
2956 | } | |
2957 | ||
2958 | /* | |
2959 | * Receive the probe location. | |
2960 | */ | |
2961 | ret = lttcomm_recv_unix_sock(sock, probe_location_buffer.data, | |
2962 | probe_location_buffer.size); | |
2963 | if (ret <= 0) { | |
2964 | DBG("Nothing recv() from client var len data... continuing"); | |
2965 | *sock_error = 1; | |
2966 | lttng_dynamic_buffer_reset(&probe_location_buffer); | |
2967 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2968 | goto error; | |
2969 | } | |
2970 | ||
2971 | buffer_view = lttng_buffer_view_from_dynamic_buffer( | |
2972 | &probe_location_buffer, 0, probe_location_buffer.size); | |
2973 | ||
2974 | /* | |
2975 | * Extract the probe location from the serialized version. | |
2976 | */ | |
2977 | ret = lttng_userspace_probe_location_create_from_buffer( | |
2978 | &buffer_view, &probe_location); | |
2979 | if (ret < 0) { | |
2980 | WARN("Failed to create a userspace probe location from the received buffer"); | |
2981 | lttng_dynamic_buffer_reset( &probe_location_buffer); | |
2982 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2983 | goto error; | |
2984 | } | |
2985 | ||
2986 | /* | |
2987 | * Receive the file descriptor to the target binary from the client. | |
2988 | */ | |
2989 | DBG("Receiving userspace probe target FD from client ..."); | |
2990 | ret = lttcomm_recv_fds_unix_sock(sock, &fd, 1); | |
2991 | if (ret <= 0) { | |
2992 | DBG("Nothing recv() from client userspace probe fd... continuing"); | |
2993 | *sock_error = 1; | |
2994 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2995 | goto error; | |
2996 | } | |
2997 | ||
2998 | /* | |
2999 | * Set the file descriptor received from the client through the unix | |
3000 | * socket in the probe location. | |
3001 | */ | |
3002 | lookup = lttng_userspace_probe_location_get_lookup_method(probe_location); | |
3003 | if (!lookup) { | |
3004 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
3005 | goto error; | |
3006 | } | |
3007 | ||
3008 | /* | |
3009 | * From the kernel tracer's perspective, all userspace probe event types | |
3010 | * are all the same: a file and an offset. | |
3011 | */ | |
3012 | switch (lttng_userspace_probe_location_lookup_method_get_type(lookup)) { | |
3013 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
3014 | ret = lttng_userspace_probe_location_function_set_binary_fd( | |
3015 | probe_location, fd); | |
3016 | break; | |
3017 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: | |
3018 | ret = lttng_userspace_probe_location_tracepoint_set_binary_fd( | |
3019 | probe_location, fd); | |
3020 | break; | |
3021 | default: | |
3022 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
3023 | goto error; | |
3024 | } | |
3025 | ||
3026 | if (ret) { | |
3027 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
3028 | goto error; | |
3029 | } | |
3030 | ||
3031 | /* Attach the probe location to the event. */ | |
3032 | ret = lttng_event_set_userspace_probe_location(event, probe_location); | |
3033 | if (ret) { | |
3034 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
3035 | goto error; | |
3036 | } | |
3037 | ||
3038 | lttng_dynamic_buffer_reset(&probe_location_buffer); | |
3039 | error: | |
3040 | return ret; | |
3041 | } | |
3042 | ||
5c408ad8 JD |
3043 | /* |
3044 | * Check if the current kernel tracer supports the session rotation feature. | |
3045 | * Return 1 if it does, 0 otherwise. | |
3046 | */ | |
3047 | static int check_rotate_compatible(void) | |
3048 | { | |
3049 | int ret = 1; | |
3050 | ||
3051 | if (kernel_tracer_version.major != 2 || kernel_tracer_version.minor < 11) { | |
3052 | DBG("Kernel tracer version is not compatible with the rotation feature"); | |
3053 | ret = 0; | |
3054 | } | |
3055 | ||
3056 | return ret; | |
3057 | } | |
3058 | ||
54d01ffb DG |
3059 | /* |
3060 | * Process the command requested by the lttng client within the command | |
3061 | * context structure. This function make sure that the return structure (llm) | |
3062 | * is set and ready for transmission before returning. | |
3063 | * | |
3064 | * Return any error encountered or 0 for success. | |
53a80697 MD |
3065 | * |
3066 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
3067 | * |
3068 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 3069 | */ |
53a80697 MD |
3070 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
3071 | int *sock_error) | |
54d01ffb | 3072 | { |
f73fabfd | 3073 | int ret = LTTNG_OK; |
44d3bd01 | 3074 | int need_tracing_session = 1; |
2e09ba09 | 3075 | int need_domain; |
54d01ffb DG |
3076 | |
3077 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
3078 | ||
3745d315 MD |
3079 | assert(!rcu_read_ongoing()); |
3080 | ||
53a80697 MD |
3081 | *sock_error = 0; |
3082 | ||
2e09ba09 MD |
3083 | switch (cmd_ctx->lsm->cmd_type) { |
3084 | case LTTNG_CREATE_SESSION: | |
27babd3a | 3085 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 3086 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
3087 | case LTTNG_DESTROY_SESSION: |
3088 | case LTTNG_LIST_SESSIONS: | |
3089 | case LTTNG_LIST_DOMAINS: | |
3090 | case LTTNG_START_TRACE: | |
3091 | case LTTNG_STOP_TRACE: | |
6d805429 | 3092 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
3093 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3094 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3095 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3096 | case LTTNG_SNAPSHOT_RECORD: | |
fb198a11 | 3097 | case LTTNG_SAVE_SESSION: |
d7ba1388 | 3098 | case LTTNG_SET_SESSION_SHM_PATH: |
eded6438 | 3099 | case LTTNG_REGENERATE_METADATA: |
c2561365 | 3100 | case LTTNG_REGENERATE_STATEDUMP: |
b3530820 JG |
3101 | case LTTNG_REGISTER_TRIGGER: |
3102 | case LTTNG_UNREGISTER_TRIGGER: | |
5c408ad8 | 3103 | case LTTNG_ROTATE_SESSION: |
d68c9a04 | 3104 | case LTTNG_ROTATION_GET_INFO: |
259c2674 | 3105 | case LTTNG_ROTATION_SET_SCHEDULE: |
66ea93b1 | 3106 | case LTTNG_SESSION_LIST_ROTATION_SCHEDULES: |
2e09ba09 | 3107 | need_domain = 0; |
3aace903 | 3108 | break; |
2e09ba09 MD |
3109 | default: |
3110 | need_domain = 1; | |
3111 | } | |
3112 | ||
e6142f2e | 3113 | if (config.no_kernel && need_domain |
2e09ba09 | 3114 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { |
531d29f9 | 3115 | if (!is_root) { |
f73fabfd | 3116 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 3117 | } else { |
f73fabfd | 3118 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 3119 | } |
4fba7219 DG |
3120 | goto error; |
3121 | } | |
3122 | ||
8d3113b2 DG |
3123 | /* Deny register consumer if we already have a spawned consumer. */ |
3124 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
3125 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
3126 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 3127 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 3128 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
3129 | goto error; |
3130 | } | |
3131 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
3132 | } | |
3133 | ||
54d01ffb DG |
3134 | /* |
3135 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 3136 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
3137 | * command. |
3138 | */ | |
3139 | switch(cmd_ctx->lsm->cmd_type) { | |
3140 | case LTTNG_LIST_SESSIONS: | |
3141 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 3142 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
3143 | case LTTNG_LIST_DOMAINS: |
3144 | case LTTNG_LIST_CHANNELS: | |
3145 | case LTTNG_LIST_EVENTS: | |
834978fd | 3146 | case LTTNG_LIST_SYSCALLS: |
a5dfbb9d | 3147 | case LTTNG_LIST_TRACKER_PIDS: |
5cd0780d | 3148 | case LTTNG_DATA_PENDING: |
5c408ad8 | 3149 | case LTTNG_ROTATE_SESSION: |
d68c9a04 | 3150 | case LTTNG_ROTATION_GET_INFO: |
66ea93b1 | 3151 | case LTTNG_SESSION_LIST_ROTATION_SCHEDULES: |
54d01ffb DG |
3152 | break; |
3153 | default: | |
3154 | /* Setup lttng message with no payload */ | |
6e10c9b9 | 3155 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0); |
54d01ffb DG |
3156 | if (ret < 0) { |
3157 | /* This label does not try to unlock the session */ | |
3158 | goto init_setup_error; | |
3159 | } | |
3160 | } | |
3161 | ||
3162 | /* Commands that DO NOT need a session. */ | |
3163 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 3164 | case LTTNG_CREATE_SESSION: |
27babd3a | 3165 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 3166 | case LTTNG_CREATE_SESSION_LIVE: |
54d01ffb DG |
3167 | case LTTNG_LIST_SESSIONS: |
3168 | case LTTNG_LIST_TRACEPOINTS: | |
834978fd | 3169 | case LTTNG_LIST_SYSCALLS: |
f37d259d | 3170 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
fb198a11 | 3171 | case LTTNG_SAVE_SESSION: |
b3530820 JG |
3172 | case LTTNG_REGISTER_TRIGGER: |
3173 | case LTTNG_UNREGISTER_TRIGGER: | |
44d3bd01 | 3174 | need_tracing_session = 0; |
54d01ffb DG |
3175 | break; |
3176 | default: | |
3177 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
3178 | /* |
3179 | * We keep the session list lock across _all_ commands | |
3180 | * for now, because the per-session lock does not | |
3181 | * handle teardown properly. | |
3182 | */ | |
74babd95 | 3183 | session_lock_list(); |
54d01ffb DG |
3184 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
3185 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 3186 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
3187 | goto error; |
3188 | } else { | |
3189 | /* Acquire lock for the session */ | |
3190 | session_lock(cmd_ctx->session); | |
3191 | } | |
3192 | break; | |
3193 | } | |
b389abbe | 3194 | |
5f3ecf22 DG |
3195 | /* |
3196 | * Commands that need a valid session but should NOT create one if none | |
3197 | * exists. Instead of creating one and destroying it when the command is | |
3198 | * handled, process that right before so we save some round trip in useless | |
3199 | * code path. | |
3200 | */ | |
3201 | switch (cmd_ctx->lsm->cmd_type) { | |
3202 | case LTTNG_DISABLE_CHANNEL: | |
3203 | case LTTNG_DISABLE_EVENT: | |
5f3ecf22 DG |
3204 | switch (cmd_ctx->lsm->domain.type) { |
3205 | case LTTNG_DOMAIN_KERNEL: | |
3206 | if (!cmd_ctx->session->kernel_session) { | |
3207 | ret = LTTNG_ERR_NO_CHANNEL; | |
3208 | goto error; | |
3209 | } | |
3210 | break; | |
3211 | case LTTNG_DOMAIN_JUL: | |
5cdb6027 | 3212 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3213 | case LTTNG_DOMAIN_PYTHON: |
5f3ecf22 DG |
3214 | case LTTNG_DOMAIN_UST: |
3215 | if (!cmd_ctx->session->ust_session) { | |
3216 | ret = LTTNG_ERR_NO_CHANNEL; | |
3217 | goto error; | |
3218 | } | |
3219 | break; | |
3220 | default: | |
3221 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3222 | goto error; | |
3223 | } | |
3224 | default: | |
3225 | break; | |
3226 | } | |
3227 | ||
2e09ba09 MD |
3228 | if (!need_domain) { |
3229 | goto skip_domain; | |
3230 | } | |
a4b92340 | 3231 | |
54d01ffb DG |
3232 | /* |
3233 | * Check domain type for specific "pre-action". | |
3234 | */ | |
3235 | switch (cmd_ctx->lsm->domain.type) { | |
3236 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 3237 | if (!is_root) { |
f73fabfd | 3238 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
3239 | goto error; |
3240 | } | |
3241 | ||
54d01ffb | 3242 | /* Kernel tracer check */ |
a4b35e07 | 3243 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3244 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3245 | ret = init_kernel_tracer(); |
3246 | if (ret != 0) { | |
54d01ffb DG |
3247 | goto error; |
3248 | } | |
3249 | } | |
5eb91c98 | 3250 | |
5c827ce0 DG |
3251 | /* Consumer is in an ERROR state. Report back to client */ |
3252 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3253 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3254 | goto error; |
3255 | } | |
3256 | ||
54d01ffb | 3257 | /* Need a session for kernel command */ |
44d3bd01 | 3258 | if (need_tracing_session) { |
54d01ffb | 3259 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3260 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3261 | if (ret < 0) { |
f73fabfd | 3262 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
3263 | goto error; |
3264 | } | |
b389abbe | 3265 | } |
7d29a247 | 3266 | |
54d01ffb | 3267 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3268 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3269 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 3270 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3271 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3272 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3273 | if (ret < 0) { |
f73fabfd | 3274 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 3275 | goto error; |
950131af | 3276 | } |
5c827ce0 | 3277 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
3278 | } else { |
3279 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3280 | } |
173af62f | 3281 | |
a4b92340 DG |
3282 | /* |
3283 | * The consumer was just spawned so we need to add the socket to | |
3284 | * the consumer output of the session if exist. | |
3285 | */ | |
3286 | ret = consumer_create_socket(&kconsumer_data, | |
3287 | cmd_ctx->session->kernel_session->consumer); | |
3288 | if (ret < 0) { | |
3289 | goto error; | |
173af62f | 3290 | } |
0d0c377a | 3291 | } |
5c827ce0 | 3292 | |
54d01ffb | 3293 | break; |
b9dfb167 | 3294 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3295 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3296 | case LTTNG_DOMAIN_PYTHON: |
2bdd86d4 | 3297 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3298 | { |
b51ec5b4 MD |
3299 | if (!ust_app_supported()) { |
3300 | ret = LTTNG_ERR_NO_UST; | |
3301 | goto error; | |
3302 | } | |
5c827ce0 DG |
3303 | /* Consumer is in an ERROR state. Report back to client */ |
3304 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3305 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3306 | goto error; |
3307 | } | |
3308 | ||
44d3bd01 | 3309 | if (need_tracing_session) { |
a4b92340 | 3310 | /* Create UST session if none exist. */ |
f6a9efaa | 3311 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3312 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3313 | &cmd_ctx->lsm->domain); |
f73fabfd | 3314 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
3315 | goto error; |
3316 | } | |
3317 | } | |
00e2e675 | 3318 | |
7753dea8 MD |
3319 | /* Start the UST consumer daemons */ |
3320 | /* 64-bit */ | |
3321 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
e6142f2e | 3322 | if (config.consumerd64_bin_path.value && |
7753dea8 | 3323 | ustconsumer64_data.pid == 0 && |
785d2d0d | 3324 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3325 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3326 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3327 | if (ret < 0) { |
f73fabfd | 3328 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 3329 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
3330 | goto error; |
3331 | } | |
48842b30 | 3332 | |
173af62f | 3333 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 3334 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3335 | } else { |
7753dea8 MD |
3336 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3337 | } | |
173af62f DG |
3338 | |
3339 | /* | |
3340 | * Setup socket for consumer 64 bit. No need for atomic access | |
3341 | * since it was set above and can ONLY be set in this thread. | |
3342 | */ | |
a4b92340 DG |
3343 | ret = consumer_create_socket(&ustconsumer64_data, |
3344 | cmd_ctx->session->ust_session->consumer); | |
3345 | if (ret < 0) { | |
3346 | goto error; | |
173af62f DG |
3347 | } |
3348 | ||
7753dea8 | 3349 | /* 32-bit */ |
385b881b | 3350 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); |
e6142f2e | 3351 | if (config.consumerd32_bin_path.value && |
7753dea8 | 3352 | ustconsumer32_data.pid == 0 && |
785d2d0d | 3353 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3354 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
3355 | ret = start_consumerd(&ustconsumer32_data); | |
3356 | if (ret < 0) { | |
f73fabfd | 3357 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 3358 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
3359 | goto error; |
3360 | } | |
5c827ce0 | 3361 | |
173af62f | 3362 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 3363 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3364 | } else { |
3365 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3366 | } |
173af62f DG |
3367 | |
3368 | /* | |
3369 | * Setup socket for consumer 64 bit. No need for atomic access | |
3370 | * since it was set above and can ONLY be set in this thread. | |
3371 | */ | |
a4b92340 DG |
3372 | ret = consumer_create_socket(&ustconsumer32_data, |
3373 | cmd_ctx->session->ust_session->consumer); | |
3374 | if (ret < 0) { | |
3375 | goto error; | |
173af62f | 3376 | } |
44d3bd01 DG |
3377 | } |
3378 | break; | |
48842b30 | 3379 | } |
54d01ffb | 3380 | default: |
54d01ffb DG |
3381 | break; |
3382 | } | |
2e09ba09 | 3383 | skip_domain: |
33a2b854 | 3384 | |
5c827ce0 DG |
3385 | /* Validate consumer daemon state when start/stop trace command */ |
3386 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3387 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3388 | switch (cmd_ctx->lsm->domain.type) { | |
e7619875 JG |
3389 | case LTTNG_DOMAIN_NONE: |
3390 | break; | |
b9dfb167 | 3391 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3392 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3393 | case LTTNG_DOMAIN_PYTHON: |
5c827ce0 DG |
3394 | case LTTNG_DOMAIN_UST: |
3395 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3396 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3397 | goto error; |
3398 | } | |
3399 | break; | |
3400 | case LTTNG_DOMAIN_KERNEL: | |
3401 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3402 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3403 | goto error; |
3404 | } | |
3405 | break; | |
825535cc JG |
3406 | default: |
3407 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3408 | goto error; | |
5c827ce0 DG |
3409 | } |
3410 | } | |
3411 | ||
8e0af1b4 MD |
3412 | /* |
3413 | * Check that the UID or GID match that of the tracing session. | |
3414 | * The root user can interact with all sessions. | |
3415 | */ | |
3416 | if (need_tracing_session) { | |
3417 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3418 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3419 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 3420 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
3421 | goto error; |
3422 | } | |
3423 | } | |
3424 | ||
ffe60014 DG |
3425 | /* |
3426 | * Send relayd information to consumer as soon as we have a domain and a | |
3427 | * session defined. | |
3428 | */ | |
3429 | if (cmd_ctx->session && need_domain) { | |
3430 | /* | |
3431 | * Setup relayd if not done yet. If the relayd information was already | |
3432 | * sent to the consumer, this call will gracefully return. | |
3433 | */ | |
3434 | ret = cmd_setup_relayd(cmd_ctx->session); | |
3435 | if (ret != LTTNG_OK) { | |
3436 | goto error; | |
3437 | } | |
3438 | } | |
3439 | ||
54d01ffb DG |
3440 | /* Process by command type */ |
3441 | switch (cmd_ctx->lsm->cmd_type) { | |
3442 | case LTTNG_ADD_CONTEXT: | |
3443 | { | |
2001793c JG |
3444 | /* |
3445 | * An LTTNG_ADD_CONTEXT command might have a supplementary | |
3446 | * payload if the context being added is an application context. | |
3447 | */ | |
3448 | if (cmd_ctx->lsm->u.context.ctx.ctx == | |
3449 | LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
3450 | char *provider_name = NULL, *context_name = NULL; | |
3451 | size_t provider_name_len = | |
3452 | cmd_ctx->lsm->u.context.provider_name_len; | |
3453 | size_t context_name_len = | |
3454 | cmd_ctx->lsm->u.context.context_name_len; | |
3455 | ||
3456 | if (provider_name_len == 0 || context_name_len == 0) { | |
3457 | /* | |
3458 | * Application provider and context names MUST | |
3459 | * be provided. | |
3460 | */ | |
3461 | ret = -LTTNG_ERR_INVALID; | |
3462 | goto error; | |
3463 | } | |
3464 | ||
3465 | provider_name = zmalloc(provider_name_len + 1); | |
3466 | if (!provider_name) { | |
3467 | ret = -LTTNG_ERR_NOMEM; | |
3468 | goto error; | |
3469 | } | |
e0f4d107 JG |
3470 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = |
3471 | provider_name; | |
2001793c JG |
3472 | |
3473 | context_name = zmalloc(context_name_len + 1); | |
3474 | if (!context_name) { | |
3475 | ret = -LTTNG_ERR_NOMEM; | |
3476 | goto error_add_context; | |
3477 | } | |
e0f4d107 JG |
3478 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = |
3479 | context_name; | |
2001793c JG |
3480 | |
3481 | ret = lttcomm_recv_unix_sock(sock, provider_name, | |
3482 | provider_name_len); | |
3483 | if (ret < 0) { | |
3484 | goto error_add_context; | |
3485 | } | |
3486 | ||
3487 | ret = lttcomm_recv_unix_sock(sock, context_name, | |
3488 | context_name_len); | |
3489 | if (ret < 0) { | |
3490 | goto error_add_context; | |
3491 | } | |
2001793c JG |
3492 | } |
3493 | ||
3494 | /* | |
3495 | * cmd_add_context assumes ownership of the provider and context | |
3496 | * names. | |
3497 | */ | |
3498 | ret = cmd_add_context(cmd_ctx->session, | |
3499 | cmd_ctx->lsm->domain.type, | |
54d01ffb | 3500 | cmd_ctx->lsm->u.context.channel_name, |
2001793c JG |
3501 | &cmd_ctx->lsm->u.context.ctx, |
3502 | kernel_poll_pipe[1]); | |
3503 | ||
3504 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = NULL; | |
3505 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = NULL; | |
3506 | error_add_context: | |
3507 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name); | |
3508 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name); | |
3509 | if (ret < 0) { | |
3510 | goto error; | |
3511 | } | |
54d01ffb DG |
3512 | break; |
3513 | } | |
3514 | case LTTNG_DISABLE_CHANNEL: | |
3515 | { | |
3516 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3517 | cmd_ctx->lsm->u.disable.channel_name); | |
3518 | break; | |
3519 | } | |
3520 | case LTTNG_DISABLE_EVENT: | |
3521 | { | |
47b7e2f9 JG |
3522 | |
3523 | /* | |
3524 | * FIXME: handle filter; for now we just receive the filter's | |
3525 | * bytecode along with the filter expression which are sent by | |
3526 | * liblttng-ctl and discard them. | |
3527 | * | |
3528 | * This fixes an issue where the client may block while sending | |
3529 | * the filter payload and encounter an error because the session | |
3530 | * daemon closes the socket without ever handling this data. | |
3531 | */ | |
3532 | size_t count = cmd_ctx->lsm->u.disable.expression_len + | |
3533 | cmd_ctx->lsm->u.disable.bytecode_len; | |
3534 | ||
3535 | if (count) { | |
3536 | char data[LTTNG_FILTER_MAX_LEN]; | |
3537 | ||
3538 | DBG("Discarding disable event command payload of size %zu", count); | |
3539 | while (count) { | |
3540 | ret = lttcomm_recv_unix_sock(sock, data, | |
3541 | count > sizeof(data) ? sizeof(data) : count); | |
3542 | if (ret < 0) { | |
3543 | goto error; | |
3544 | } | |
3545 | ||
3546 | count -= (size_t) ret; | |
3547 | } | |
3548 | } | |
6e911cad | 3549 | /* FIXME: passing packed structure to non-packed pointer */ |
54d01ffb DG |
3550 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3551 | cmd_ctx->lsm->u.disable.channel_name, | |
6e911cad | 3552 | &cmd_ctx->lsm->u.disable.event); |
33a2b854 DG |
3553 | break; |
3554 | } | |
54d01ffb DG |
3555 | case LTTNG_ENABLE_CHANNEL: |
3556 | { | |
b3530820 JG |
3557 | cmd_ctx->lsm->u.channel.chan.attr.extended.ptr = |
3558 | (struct lttng_channel_extended *) &cmd_ctx->lsm->u.channel.extended; | |
7972aab2 | 3559 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
b3530820 JG |
3560 | &cmd_ctx->lsm->u.channel.chan, |
3561 | kernel_poll_pipe[1]); | |
54d01ffb DG |
3562 | break; |
3563 | } | |
ccf10263 MD |
3564 | case LTTNG_TRACK_PID: |
3565 | { | |
3566 | ret = cmd_track_pid(cmd_ctx->session, | |
3567 | cmd_ctx->lsm->domain.type, | |
3568 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3569 | break; | |
3570 | } | |
3571 | case LTTNG_UNTRACK_PID: | |
3572 | { | |
3573 | ret = cmd_untrack_pid(cmd_ctx->session, | |
3574 | cmd_ctx->lsm->domain.type, | |
3575 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3576 | break; | |
3577 | } | |
54d01ffb DG |
3578 | case LTTNG_ENABLE_EVENT: |
3579 | { | |
dcabc190 | 3580 | struct lttng_event *ev = NULL; |
882ef835 JI |
3581 | struct lttng_event_exclusion *exclusion = NULL; |
3582 | struct lttng_filter_bytecode *bytecode = NULL; | |
6b453b5e | 3583 | char *filter_expression = NULL; |
882ef835 | 3584 | |
67676bd8 DG |
3585 | /* Handle exclusion events and receive it from the client. */ |
3586 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3587 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3588 | ||
3589 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3590 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3591 | if (!exclusion) { | |
3592 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3593 | goto error; | |
882ef835 | 3594 | } |
882ef835 | 3595 | |
67676bd8 DG |
3596 | DBG("Receiving var len exclusion event list from client ..."); |
3597 | exclusion->count = count; | |
3598 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3599 | count * LTTNG_SYMBOL_NAME_LEN); | |
3600 | if (ret <= 0) { | |
3601 | DBG("Nothing recv() from client var len data... continuing"); | |
3602 | *sock_error = 1; | |
3603 | free(exclusion); | |
3604 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3605 | goto error; | |
3606 | } | |
3607 | } | |
3608 | ||
6b453b5e JG |
3609 | /* Get filter expression from client. */ |
3610 | if (cmd_ctx->lsm->u.enable.expression_len > 0) { | |
3611 | size_t expression_len = | |
3612 | cmd_ctx->lsm->u.enable.expression_len; | |
3613 | ||
3614 | if (expression_len > LTTNG_FILTER_MAX_LEN) { | |
3615 | ret = LTTNG_ERR_FILTER_INVAL; | |
3616 | free(exclusion); | |
3617 | goto error; | |
3618 | } | |
3619 | ||
3620 | filter_expression = zmalloc(expression_len); | |
3621 | if (!filter_expression) { | |
3622 | free(exclusion); | |
3623 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3624 | goto error; | |
3625 | } | |
3626 | ||
3627 | /* Receive var. len. data */ | |
3628 | DBG("Receiving var len filter's expression from client ..."); | |
3629 | ret = lttcomm_recv_unix_sock(sock, filter_expression, | |
3630 | expression_len); | |
3631 | if (ret <= 0) { | |
dcabc190 | 3632 | DBG("Nothing recv() from client var len data... continuing"); |
6b453b5e JG |
3633 | *sock_error = 1; |
3634 | free(filter_expression); | |
3635 | free(exclusion); | |
3636 | ret = LTTNG_ERR_FILTER_INVAL; | |
3637 | goto error; | |
3638 | } | |
3639 | } | |
3640 | ||
67676bd8 DG |
3641 | /* Handle filter and get bytecode from client. */ |
3642 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3643 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3644 | ||
3645 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3646 | ret = LTTNG_ERR_FILTER_INVAL; | |
49d21f93 | 3647 | free(filter_expression); |
67676bd8 DG |
3648 | free(exclusion); |
3649 | goto error; | |
3650 | } | |
3651 | ||
3652 | bytecode = zmalloc(bytecode_len); | |
3653 | if (!bytecode) { | |
49d21f93 | 3654 | free(filter_expression); |
67676bd8 DG |
3655 | free(exclusion); |
3656 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3657 | goto error; | |
882ef835 JI |
3658 | } |
3659 | ||
67676bd8 DG |
3660 | /* Receive var. len. data */ |
3661 | DBG("Receiving var len filter's bytecode from client ..."); | |
3662 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3663 | if (ret <= 0) { | |
dcabc190 | 3664 | DBG("Nothing recv() from client var len data... continuing"); |
67676bd8 | 3665 | *sock_error = 1; |
49d21f93 | 3666 | free(filter_expression); |
67676bd8 DG |
3667 | free(bytecode); |
3668 | free(exclusion); | |
3669 | ret = LTTNG_ERR_FILTER_INVAL; | |
3670 | goto error; | |
3671 | } | |
3672 | ||
3673 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
49d21f93 | 3674 | free(filter_expression); |
67676bd8 DG |
3675 | free(bytecode); |
3676 | free(exclusion); | |
3677 | ret = LTTNG_ERR_FILTER_INVAL; | |
3678 | goto error; | |
3679 | } | |
882ef835 | 3680 | } |
67676bd8 | 3681 | |
dcabc190 FD |
3682 | ev = lttng_event_copy(&cmd_ctx->lsm->u.enable.event); |
3683 | if (!ev) { | |
3684 | DBG("Failed to copy event: %s", | |
3685 | cmd_ctx->lsm->u.enable.event.name); | |
5ae0c80e JG |
3686 | free(filter_expression); |
3687 | free(bytecode); | |
3688 | free(exclusion); | |
dcabc190 FD |
3689 | ret = LTTNG_ERR_NOMEM; |
3690 | goto error; | |
3691 | } | |
3692 | ||
3693 | ||
3694 | if (cmd_ctx->lsm->u.enable.userspace_probe_location_len > 0) { | |
3695 | /* Expect a userspace probe description. */ | |
3696 | ret = receive_userspace_probe(cmd_ctx, sock, sock_error, ev); | |
3697 | if (ret) { | |
5ae0c80e JG |
3698 | free(filter_expression); |
3699 | free(bytecode); | |
3700 | free(exclusion); | |
dcabc190 FD |
3701 | lttng_event_destroy(ev); |
3702 | goto error; | |
3703 | } | |
3704 | } | |
3705 | ||
67676bd8 DG |
3706 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, |
3707 | cmd_ctx->lsm->u.enable.channel_name, | |
dcabc190 | 3708 | ev, |
6b453b5e | 3709 | filter_expression, bytecode, exclusion, |
67676bd8 | 3710 | kernel_poll_pipe[1]); |
dcabc190 | 3711 | lttng_event_destroy(ev); |
54d01ffb DG |
3712 | break; |
3713 | } | |
052da939 | 3714 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3715 | { |
9f19cc17 | 3716 | struct lttng_event *events; |
54d01ffb | 3717 | ssize_t nb_events; |
052da939 | 3718 | |
0845bbfa | 3719 | session_lock_list(); |
54d01ffb | 3720 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
0845bbfa | 3721 | session_unlock_list(); |
54d01ffb | 3722 | if (nb_events < 0) { |
f73fabfd | 3723 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3724 | ret = -nb_events; |
3725 | goto error; | |
2ef84c95 DG |
3726 | } |
3727 | ||
3728 | /* | |
3729 | * Setup lttng message with payload size set to the event list size in | |
3730 | * bytes and then copy list into the llm payload. | |
3731 | */ | |
6e10c9b9 PP |
3732 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3733 | sizeof(struct lttng_event) * nb_events); | |
3734 | free(events); | |
3735 | ||
2ef84c95 DG |
3736 | if (ret < 0) { |
3737 | goto setup_error; | |
3738 | } | |
3739 | ||
f73fabfd | 3740 | ret = LTTNG_OK; |
2ef84c95 DG |
3741 | break; |
3742 | } | |
f37d259d MD |
3743 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3744 | { | |
3745 | struct lttng_event_field *fields; | |
3746 | ssize_t nb_fields; | |
3747 | ||
0845bbfa | 3748 | session_lock_list(); |
a4b92340 DG |
3749 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3750 | &fields); | |
0845bbfa | 3751 | session_unlock_list(); |
f37d259d | 3752 | if (nb_fields < 0) { |
f73fabfd | 3753 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3754 | ret = -nb_fields; |
3755 | goto error; | |
3756 | } | |
3757 | ||
3758 | /* | |
3759 | * Setup lttng message with payload size set to the event list size in | |
3760 | * bytes and then copy list into the llm payload. | |
3761 | */ | |
6e10c9b9 | 3762 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, fields, |
a4b92340 | 3763 | sizeof(struct lttng_event_field) * nb_fields); |
6e10c9b9 PP |
3764 | free(fields); |
3765 | ||
f37d259d | 3766 | if (ret < 0) { |
f37d259d MD |
3767 | goto setup_error; |
3768 | } | |
3769 | ||
f73fabfd | 3770 | ret = LTTNG_OK; |
f37d259d MD |
3771 | break; |
3772 | } | |
834978fd DG |
3773 | case LTTNG_LIST_SYSCALLS: |
3774 | { | |
3775 | struct lttng_event *events; | |
3776 | ssize_t nb_events; | |
3777 | ||
3778 | nb_events = cmd_list_syscalls(&events); | |
3779 | if (nb_events < 0) { | |
3780 | /* Return value is a negative lttng_error_code. */ | |
3781 | ret = -nb_events; | |
3782 | goto error; | |
3783 | } | |
3784 | ||
3785 | /* | |
3786 | * Setup lttng message with payload size set to the event list size in | |
3787 | * bytes and then copy list into the llm payload. | |
3788 | */ | |
6e10c9b9 PP |
3789 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3790 | sizeof(struct lttng_event) * nb_events); | |
3791 | free(events); | |
3792 | ||
834978fd | 3793 | if (ret < 0) { |
834978fd DG |
3794 | goto setup_error; |
3795 | } | |
3796 | ||
834978fd DG |
3797 | ret = LTTNG_OK; |
3798 | break; | |
3799 | } | |
a5dfbb9d MD |
3800 | case LTTNG_LIST_TRACKER_PIDS: |
3801 | { | |
3802 | int32_t *pids = NULL; | |
3803 | ssize_t nr_pids; | |
3804 | ||
3805 | nr_pids = cmd_list_tracker_pids(cmd_ctx->session, | |
3806 | cmd_ctx->lsm->domain.type, &pids); | |
3807 | if (nr_pids < 0) { | |
3808 | /* Return value is a negative lttng_error_code. */ | |
3809 | ret = -nr_pids; | |
3810 | goto error; | |
3811 | } | |
3812 | ||
3813 | /* | |
3814 | * Setup lttng message with payload size set to the event list size in | |
3815 | * bytes and then copy list into the llm payload. | |
3816 | */ | |
6e10c9b9 PP |
3817 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, pids, |
3818 | sizeof(int32_t) * nr_pids); | |
3819 | free(pids); | |
3820 | ||
a5dfbb9d | 3821 | if (ret < 0) { |
a5dfbb9d MD |
3822 | goto setup_error; |
3823 | } | |
3824 | ||
a5dfbb9d MD |
3825 | ret = LTTNG_OK; |
3826 | break; | |
3827 | } | |
00e2e675 DG |
3828 | case LTTNG_SET_CONSUMER_URI: |
3829 | { | |
a4b92340 DG |
3830 | size_t nb_uri, len; |
3831 | struct lttng_uri *uris; | |
3832 | ||
3833 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3834 | len = nb_uri * sizeof(struct lttng_uri); | |
3835 | ||
3836 | if (nb_uri == 0) { | |
f73fabfd | 3837 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3838 | goto error; |
3839 | } | |
3840 | ||
3841 | uris = zmalloc(len); | |
3842 | if (uris == NULL) { | |
f73fabfd | 3843 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3844 | goto error; |
3845 | } | |
3846 | ||
3847 | /* Receive variable len data */ | |
77c7c900 | 3848 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3849 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3850 | if (ret <= 0) { | |
3851 | DBG("No URIs received from client... continuing"); | |
3852 | *sock_error = 1; | |
f73fabfd | 3853 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3854 | free(uris); |
a4b92340 DG |
3855 | goto error; |
3856 | } | |
3857 | ||
bda32d56 JG |
3858 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); |
3859 | free(uris); | |
f73fabfd | 3860 | if (ret != LTTNG_OK) { |
a4b92340 DG |
3861 | goto error; |
3862 | } | |
3863 | ||
b1d41407 | 3864 | |
00e2e675 DG |
3865 | break; |
3866 | } | |
f3ed775e | 3867 | case LTTNG_START_TRACE: |
8c0faa1d | 3868 | { |
259c2674 JD |
3869 | /* |
3870 | * On the first start, if we have a kernel session and we have | |
3871 | * enabled time or size-based rotations, we have to make sure | |
3872 | * the kernel tracer supports it. | |
3873 | */ | |
3874 | if (!cmd_ctx->session->has_been_started && \ | |
3875 | cmd_ctx->session->kernel_session && \ | |
3876 | (cmd_ctx->session->rotate_timer_period || \ | |
3877 | cmd_ctx->session->rotate_size) && \ | |
3878 | !check_rotate_compatible()) { | |
3879 | DBG("Kernel tracer version is not compatible with the rotation feature"); | |
3880 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
3881 | goto error; | |
3882 | } | |
54d01ffb | 3883 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3884 | break; |
3885 | } | |
f3ed775e | 3886 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3887 | { |
54d01ffb | 3888 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3889 | break; |
3890 | } | |
5e16da05 MD |
3891 | case LTTNG_CREATE_SESSION: |
3892 | { | |
a4b92340 DG |
3893 | size_t nb_uri, len; |
3894 | struct lttng_uri *uris = NULL; | |
3895 | ||
3896 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3897 | len = nb_uri * sizeof(struct lttng_uri); | |
3898 | ||
3899 | if (nb_uri > 0) { | |
3900 | uris = zmalloc(len); | |
3901 | if (uris == NULL) { | |
f73fabfd | 3902 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3903 | goto error; |
3904 | } | |
3905 | ||
3906 | /* Receive variable len data */ | |
77c7c900 | 3907 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3908 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3909 | if (ret <= 0) { | |
3910 | DBG("No URIs received from client... continuing"); | |
3911 | *sock_error = 1; | |
f73fabfd | 3912 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3913 | free(uris); |
a4b92340 DG |
3914 | goto error; |
3915 | } | |
3916 | ||
3917 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3918 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3919 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3920 | free(uris); |
a4b92340 DG |
3921 | goto error; |
3922 | } | |
3923 | } | |
3924 | ||
3925 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3926 | &cmd_ctx->creds, 0); |
a4b92340 | 3927 | |
b1d41407 DG |
3928 | free(uris); |
3929 | ||
00e2e675 DG |
3930 | break; |
3931 | } | |
5e16da05 MD |
3932 | case LTTNG_DESTROY_SESSION: |
3933 | { | |
90936dcf JD |
3934 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1], |
3935 | notification_thread_handle); | |
a4b92340 DG |
3936 | |
3937 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3938 | cmd_ctx->session = NULL; |
5461b305 | 3939 | break; |
5e16da05 | 3940 | } |
9f19cc17 | 3941 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3942 | { |
54d01ffb | 3943 | ssize_t nb_dom; |
fa64dfb4 | 3944 | struct lttng_domain *domains = NULL; |
5461b305 | 3945 | |
54d01ffb DG |
3946 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3947 | if (nb_dom < 0) { | |
f73fabfd | 3948 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3949 | ret = -nb_dom; |
3950 | goto error; | |
ce3d728c | 3951 | } |
520ff687 | 3952 | |
6e10c9b9 PP |
3953 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, domains, |
3954 | nb_dom * sizeof(struct lttng_domain)); | |
3955 | free(domains); | |
3956 | ||
5461b305 DG |
3957 | if (ret < 0) { |
3958 | goto setup_error; | |
520ff687 | 3959 | } |
57167058 | 3960 | |
f73fabfd | 3961 | ret = LTTNG_OK; |
5e16da05 MD |
3962 | break; |
3963 | } | |
9f19cc17 | 3964 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3965 | { |
53e367f9 | 3966 | ssize_t payload_size; |
ade7ce52 | 3967 | struct lttng_channel *channels = NULL; |
54d01ffb | 3968 | |
53e367f9 | 3969 | payload_size = cmd_list_channels(cmd_ctx->lsm->domain.type, |
b551a063 | 3970 | cmd_ctx->session, &channels); |
53e367f9 | 3971 | if (payload_size < 0) { |
f73fabfd | 3972 | /* Return value is a negative lttng_error_code. */ |
53e367f9 | 3973 | ret = -payload_size; |
54d01ffb | 3974 | goto error; |
5461b305 | 3975 | } |
ca95a216 | 3976 | |
6e10c9b9 | 3977 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, channels, |
53e367f9 | 3978 | payload_size); |
6e10c9b9 PP |
3979 | free(channels); |
3980 | ||
5461b305 DG |
3981 | if (ret < 0) { |
3982 | goto setup_error; | |
3983 | } | |
9f19cc17 | 3984 | |
f73fabfd | 3985 | ret = LTTNG_OK; |
5461b305 | 3986 | break; |
5e16da05 | 3987 | } |
9f19cc17 | 3988 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3989 | { |
b551a063 | 3990 | ssize_t nb_event; |
684d34d2 | 3991 | struct lttng_event *events = NULL; |
b4e3ceb9 PP |
3992 | struct lttcomm_event_command_header cmd_header; |
3993 | size_t total_size; | |
3994 | ||
b2d66287 | 3995 | memset(&cmd_header, 0, sizeof(cmd_header)); |
b4e3ceb9 PP |
3996 | /* Extended infos are included at the end of events */ |
3997 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, | |
3998 | cmd_ctx->session, cmd_ctx->lsm->u.list.channel_name, | |
3999 | &events, &total_size); | |
9f19cc17 | 4000 | |
54d01ffb | 4001 | if (nb_event < 0) { |
f73fabfd | 4002 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
4003 | ret = -nb_event; |
4004 | goto error; | |
5461b305 | 4005 | } |
ca95a216 | 4006 | |
b4e3ceb9 PP |
4007 | cmd_header.nb_events = nb_event; |
4008 | ret = setup_lttng_msg(cmd_ctx, events, total_size, | |
4009 | &cmd_header, sizeof(cmd_header)); | |
6e10c9b9 PP |
4010 | free(events); |
4011 | ||
5461b305 DG |
4012 | if (ret < 0) { |
4013 | goto setup_error; | |
4014 | } | |
9f19cc17 | 4015 | |
f73fabfd | 4016 | ret = LTTNG_OK; |
5461b305 | 4017 | break; |
5e16da05 MD |
4018 | } |
4019 | case LTTNG_LIST_SESSIONS: | |
4020 | { | |
8e0af1b4 | 4021 | unsigned int nr_sessions; |
6e10c9b9 PP |
4022 | void *sessions_payload; |
4023 | size_t payload_len; | |
5461b305 | 4024 | |
8e0af1b4 | 4025 | session_lock_list(); |
730389d9 DG |
4026 | nr_sessions = lttng_sessions_count( |
4027 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
4028 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6e10c9b9 PP |
4029 | payload_len = sizeof(struct lttng_session) * nr_sessions; |
4030 | sessions_payload = zmalloc(payload_len); | |
d32fb093 | 4031 | |
6e10c9b9 | 4032 | if (!sessions_payload) { |
54d01ffb | 4033 | session_unlock_list(); |
6e10c9b9 | 4034 | ret = -ENOMEM; |
5461b305 | 4035 | goto setup_error; |
e065084a | 4036 | } |
5e16da05 | 4037 | |
6e10c9b9 | 4038 | cmd_list_lttng_sessions(sessions_payload, |
730389d9 DG |
4039 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
4040 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
54d01ffb | 4041 | session_unlock_list(); |
5e16da05 | 4042 | |
6e10c9b9 PP |
4043 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, sessions_payload, |
4044 | payload_len); | |
4045 | free(sessions_payload); | |
4046 | ||
4047 | if (ret < 0) { | |
4048 | goto setup_error; | |
4049 | } | |
4050 | ||
f73fabfd | 4051 | ret = LTTNG_OK; |
5e16da05 MD |
4052 | break; |
4053 | } | |
d9800920 DG |
4054 | case LTTNG_REGISTER_CONSUMER: |
4055 | { | |
2f77fc4b DG |
4056 | struct consumer_data *cdata; |
4057 | ||
4058 | switch (cmd_ctx->lsm->domain.type) { | |
4059 | case LTTNG_DOMAIN_KERNEL: | |
4060 | cdata = &kconsumer_data; | |
4061 | break; | |
4062 | default: | |
f73fabfd | 4063 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
4064 | goto error; |
4065 | } | |
4066 | ||
54d01ffb | 4067 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 4068 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
4069 | break; |
4070 | } | |
6d805429 | 4071 | case LTTNG_DATA_PENDING: |
806e2684 | 4072 | { |
f6151c55 | 4073 | int pending_ret; |
6e10c9b9 | 4074 | uint8_t pending_ret_byte; |
f6151c55 JG |
4075 | |
4076 | pending_ret = cmd_data_pending(cmd_ctx->session); | |
6e10c9b9 | 4077 | |
f6151c55 JG |
4078 | /* |
4079 | * FIXME | |
4080 | * | |
4081 | * This function may returns 0 or 1 to indicate whether or not | |
4082 | * there is data pending. In case of error, it should return an | |
4083 | * LTTNG_ERR code. However, some code paths may still return | |
4084 | * a nondescript error code, which we handle by returning an | |
4085 | * "unknown" error. | |
4086 | */ | |
4087 | if (pending_ret == 0 || pending_ret == 1) { | |
6e10c9b9 PP |
4088 | /* |
4089 | * ret will be set to LTTNG_OK at the end of | |
4090 | * this function. | |
4091 | */ | |
f6151c55 JG |
4092 | } else if (pending_ret < 0) { |
4093 | ret = LTTNG_ERR_UNK; | |
4094 | goto setup_error; | |
4095 | } else { | |
4096 | ret = pending_ret; | |
4097 | goto setup_error; | |
4098 | } | |
4099 | ||
6e10c9b9 PP |
4100 | pending_ret_byte = (uint8_t) pending_ret; |
4101 | ||
4102 | /* 1 byte to return whether or not data is pending */ | |
4103 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, | |
4104 | &pending_ret_byte, 1); | |
4105 | ||
4106 | if (ret < 0) { | |
4107 | goto setup_error; | |
4108 | } | |
4109 | ||
4110 | ret = LTTNG_OK; | |
806e2684 DG |
4111 | break; |
4112 | } | |
da3c9ec1 DG |
4113 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
4114 | { | |
6dc3064a DG |
4115 | struct lttcomm_lttng_output_id reply; |
4116 | ||
4117 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
4118 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
4119 | if (ret != LTTNG_OK) { | |
4120 | goto error; | |
4121 | } | |
4122 | ||
6e10c9b9 PP |
4123 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &reply, |
4124 | sizeof(reply)); | |
6dc3064a DG |
4125 | if (ret < 0) { |
4126 | goto setup_error; | |
4127 | } | |
4128 | ||
4129 | /* Copy output list into message payload */ | |
6dc3064a | 4130 | ret = LTTNG_OK; |
da3c9ec1 DG |
4131 | break; |
4132 | } | |
4133 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
4134 | { | |
6dc3064a DG |
4135 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
4136 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
4137 | break; |
4138 | } | |
4139 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
4140 | { | |
6dc3064a DG |
4141 | ssize_t nb_output; |
4142 | struct lttng_snapshot_output *outputs = NULL; | |
4143 | ||
4144 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
4145 | if (nb_output < 0) { | |
4146 | ret = -nb_output; | |
4147 | goto error; | |
4148 | } | |
4149 | ||
6e10c9b9 PP |
4150 | assert((nb_output > 0 && outputs) || nb_output == 0); |
4151 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, outputs, | |
6dc3064a | 4152 | nb_output * sizeof(struct lttng_snapshot_output)); |
6e10c9b9 PP |
4153 | free(outputs); |
4154 | ||
6dc3064a | 4155 | if (ret < 0) { |
6dc3064a DG |
4156 | goto setup_error; |
4157 | } | |
4158 | ||
6dc3064a | 4159 | ret = LTTNG_OK; |
da3c9ec1 DG |
4160 | break; |
4161 | } | |
4162 | case LTTNG_SNAPSHOT_RECORD: | |
4163 | { | |
6dc3064a DG |
4164 | ret = cmd_snapshot_record(cmd_ctx->session, |
4165 | &cmd_ctx->lsm->u.snapshot_record.output, | |
4166 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
4167 | break; |
4168 | } | |
27babd3a DG |
4169 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
4170 | { | |
4171 | size_t nb_uri, len; | |
4172 | struct lttng_uri *uris = NULL; | |
4173 | ||
4174 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4175 | len = nb_uri * sizeof(struct lttng_uri); | |
4176 | ||
4177 | if (nb_uri > 0) { | |
4178 | uris = zmalloc(len); | |
4179 | if (uris == NULL) { | |
4180 | ret = LTTNG_ERR_FATAL; | |
4181 | goto error; | |
4182 | } | |
4183 | ||
4184 | /* Receive variable len data */ | |
4185 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
4186 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
4187 | if (ret <= 0) { | |
4188 | DBG("No URIs received from client... continuing"); | |
4189 | *sock_error = 1; | |
4190 | ret = LTTNG_ERR_SESSION_FAIL; | |
4191 | free(uris); | |
4192 | goto error; | |
4193 | } | |
4194 | ||
4195 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4196 | DBG("Creating session with ONE network URI is a bad call"); | |
4197 | ret = LTTNG_ERR_SESSION_FAIL; | |
4198 | free(uris); | |
4199 | goto error; | |
4200 | } | |
4201 | } | |
4202 | ||
4203 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
4204 | nb_uri, &cmd_ctx->creds); | |
4205 | free(uris); | |
4206 | break; | |
4207 | } | |
ecc48a90 JD |
4208 | case LTTNG_CREATE_SESSION_LIVE: |
4209 | { | |
4210 | size_t nb_uri, len; | |
4211 | struct lttng_uri *uris = NULL; | |
4212 | ||
4213 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4214 | len = nb_uri * sizeof(struct lttng_uri); | |
4215 | ||
4216 | if (nb_uri > 0) { | |
4217 | uris = zmalloc(len); | |
4218 | if (uris == NULL) { | |
4219 | ret = LTTNG_ERR_FATAL; | |
4220 | goto error; | |
4221 | } | |
4222 | ||
4223 | /* Receive variable len data */ | |
4224 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
4225 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
4226 | if (ret <= 0) { | |
4227 | DBG("No URIs received from client... continuing"); | |
4228 | *sock_error = 1; | |
4229 | ret = LTTNG_ERR_SESSION_FAIL; | |
4230 | free(uris); | |
4231 | goto error; | |
4232 | } | |
4233 | ||
4234 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4235 | DBG("Creating session with ONE network URI is a bad call"); | |
4236 | ret = LTTNG_ERR_SESSION_FAIL; | |
4237 | free(uris); | |
4238 | goto error; | |
4239 | } | |
4240 | } | |
4241 | ||
4242 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
4243 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
4244 | free(uris); | |
4245 | break; | |
4246 | } | |
fb198a11 JG |
4247 | case LTTNG_SAVE_SESSION: |
4248 | { | |
4249 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
4250 | &cmd_ctx->creds); | |
4251 | break; | |
4252 | } | |
d7ba1388 MD |
4253 | case LTTNG_SET_SESSION_SHM_PATH: |
4254 | { | |
4255 | ret = cmd_set_session_shm_path(cmd_ctx->session, | |
4256 | cmd_ctx->lsm->u.set_shm_path.shm_path); | |
4257 | break; | |
4258 | } | |
eded6438 | 4259 | case LTTNG_REGENERATE_METADATA: |
93ec662e | 4260 | { |
eded6438 | 4261 | ret = cmd_regenerate_metadata(cmd_ctx->session); |
93ec662e JD |
4262 | break; |
4263 | } | |
c2561365 JD |
4264 | case LTTNG_REGENERATE_STATEDUMP: |
4265 | { | |
4266 | ret = cmd_regenerate_statedump(cmd_ctx->session); | |
4267 | break; | |
4268 | } | |
b3530820 JG |
4269 | case LTTNG_REGISTER_TRIGGER: |
4270 | { | |
4271 | ret = cmd_register_trigger(cmd_ctx, sock, | |
4272 | notification_thread_handle); | |
4273 | break; | |
4274 | } | |
4275 | case LTTNG_UNREGISTER_TRIGGER: | |
4276 | { | |
4277 | ret = cmd_unregister_trigger(cmd_ctx, sock, | |
4278 | notification_thread_handle); | |
4279 | break; | |
4280 | } | |
5c408ad8 JD |
4281 | case LTTNG_ROTATE_SESSION: |
4282 | { | |
4283 | struct lttng_rotate_session_return rotate_return; | |
4284 | ||
4285 | DBG("Client rotate session \"%s\"", cmd_ctx->session->name); | |
4286 | ||
d68c9a04 | 4287 | memset(&rotate_return, 0, sizeof(rotate_return)); |
5c408ad8 JD |
4288 | if (cmd_ctx->session->kernel_session && !check_rotate_compatible()) { |
4289 | DBG("Kernel tracer version is not compatible with the rotation feature"); | |
4290 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
4291 | goto error; | |
4292 | } | |
4293 | ||
4294 | ret = cmd_rotate_session(cmd_ctx->session, &rotate_return); | |
4295 | if (ret < 0) { | |
4296 | ret = -ret; | |
4297 | goto error; | |
4298 | } | |
4299 | ||
4300 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &rotate_return, | |
4301 | sizeof(rotate_return)); | |
4302 | if (ret < 0) { | |
4303 | ret = -ret; | |
4304 | goto error; | |
4305 | } | |
4306 | ||
4307 | ret = LTTNG_OK; | |
4308 | break; | |
4309 | } | |
d68c9a04 | 4310 | case LTTNG_ROTATION_GET_INFO: |
5c408ad8 | 4311 | { |
d68c9a04 | 4312 | struct lttng_rotation_get_info_return get_info_return; |
5c408ad8 | 4313 | |
d68c9a04 JD |
4314 | memset(&get_info_return, 0, sizeof(get_info_return)); |
4315 | ret = cmd_rotate_get_info(cmd_ctx->session, &get_info_return, | |
4316 | cmd_ctx->lsm->u.get_rotation_info.rotation_id); | |
5c408ad8 JD |
4317 | if (ret < 0) { |
4318 | ret = -ret; | |
4319 | goto error; | |
4320 | } | |
4321 | ||
d68c9a04 JD |
4322 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &get_info_return, |
4323 | sizeof(get_info_return)); | |
5c408ad8 JD |
4324 | if (ret < 0) { |
4325 | ret = -ret; | |
4326 | goto error; | |
4327 | } | |
4328 | ||
4329 | ret = LTTNG_OK; | |
4330 | break; | |
4331 | } | |
259c2674 JD |
4332 | case LTTNG_ROTATION_SET_SCHEDULE: |
4333 | { | |
66ea93b1 JG |
4334 | bool set_schedule; |
4335 | enum lttng_rotation_schedule_type schedule_type; | |
4336 | uint64_t value; | |
4337 | ||
259c2674 JD |
4338 | if (cmd_ctx->session->kernel_session && !check_rotate_compatible()) { |
4339 | DBG("Kernel tracer version does not support session rotations"); | |
4340 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
4341 | goto error; | |
4342 | } | |
4343 | ||
66ea93b1 JG |
4344 | set_schedule = cmd_ctx->lsm->u.rotation_set_schedule.set == 1; |
4345 | schedule_type = (enum lttng_rotation_schedule_type) cmd_ctx->lsm->u.rotation_set_schedule.type; | |
4346 | value = cmd_ctx->lsm->u.rotation_set_schedule.value; | |
4347 | ||
259c2674 | 4348 | ret = cmd_rotation_set_schedule(cmd_ctx->session, |
66ea93b1 JG |
4349 | set_schedule, |
4350 | schedule_type, | |
4351 | value, | |
90936dcf | 4352 | notification_thread_handle); |
a2026546 | 4353 | if (ret != LTTNG_OK) { |
259c2674 JD |
4354 | goto error; |
4355 | } | |
4356 | ||
259c2674 JD |
4357 | break; |
4358 | } | |
66ea93b1 | 4359 | case LTTNG_SESSION_LIST_ROTATION_SCHEDULES: |
329f3443 | 4360 | { |
66ea93b1 JG |
4361 | struct lttng_session_list_schedules_return schedules = { |
4362 | .periodic.set = !!cmd_ctx->session->rotate_timer_period, | |
4363 | .periodic.value = cmd_ctx->session->rotate_timer_period, | |
4364 | .size.set = !!cmd_ctx->session->rotate_size, | |
4365 | .size.value = cmd_ctx->session->rotate_size, | |
4366 | }; | |
4367 | ||
4368 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &schedules, | |
4369 | sizeof(schedules)); | |
329f3443 JD |
4370 | if (ret < 0) { |
4371 | ret = -ret; | |
4372 | goto error; | |
4373 | } | |
4374 | ||
4375 | ret = LTTNG_OK; | |
4376 | break; | |
4377 | } | |
5e16da05 | 4378 | default: |
f73fabfd | 4379 | ret = LTTNG_ERR_UND; |
5461b305 | 4380 | break; |
fac6795d DG |
4381 | } |
4382 | ||
5461b305 | 4383 | error: |
5461b305 DG |
4384 | if (cmd_ctx->llm == NULL) { |
4385 | DBG("Missing llm structure. Allocating one."); | |
6e10c9b9 | 4386 | if (setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0) < 0) { |
5461b305 DG |
4387 | goto setup_error; |
4388 | } | |
4389 | } | |
54d01ffb | 4390 | /* Set return code */ |
5461b305 | 4391 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 4392 | setup_error: |
b5541356 | 4393 | if (cmd_ctx->session) { |
54d01ffb | 4394 | session_unlock(cmd_ctx->session); |
b5541356 | 4395 | } |
256a5576 MD |
4396 | if (need_tracing_session) { |
4397 | session_unlock_list(); | |
4398 | } | |
54d01ffb | 4399 | init_setup_error: |
3745d315 | 4400 | assert(!rcu_read_ongoing()); |
8028d920 | 4401 | return ret; |
fac6795d DG |
4402 | } |
4403 | ||
44a5e5eb DG |
4404 | /* |
4405 | * Thread managing health check socket. | |
4406 | */ | |
4407 | static void *thread_manage_health(void *data) | |
4408 | { | |
eb4a2943 | 4409 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
4410 | uint32_t revents, nb_fd; |
4411 | struct lttng_poll_event events; | |
0c89d795 MD |
4412 | struct health_comm_msg msg; |
4413 | struct health_comm_reply reply; | |
44a5e5eb DG |
4414 | |
4415 | DBG("[thread] Manage health check started"); | |
4416 | ||
4417 | rcu_register_thread(); | |
4418 | ||
6d737ce4 DG |
4419 | /* We might hit an error path before this is created. */ |
4420 | lttng_poll_init(&events); | |
3cc04881 | 4421 | |
44a5e5eb | 4422 | /* Create unix socket */ |
e6142f2e | 4423 | sock = lttcomm_create_unix_sock(config.health_unix_sock_path.value); |
44a5e5eb DG |
4424 | if (sock < 0) { |
4425 | ERR("Unable to create health check Unix socket"); | |
44a5e5eb DG |
4426 | goto error; |
4427 | } | |
4428 | ||
6c71277b MD |
4429 | if (is_root) { |
4430 | /* lttng health client socket path permissions */ | |
e6142f2e JG |
4431 | ret = chown(config.health_unix_sock_path.value, 0, |
4432 | utils_get_group_id(config.tracing_group_name.value)); | |
6c71277b | 4433 | if (ret < 0) { |
e6142f2e | 4434 | ERR("Unable to set group on %s", config.health_unix_sock_path.value); |
6c71277b | 4435 | PERROR("chown"); |
6c71277b MD |
4436 | goto error; |
4437 | } | |
4438 | ||
e6142f2e | 4439 | ret = chmod(config.health_unix_sock_path.value, |
6c71277b MD |
4440 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
4441 | if (ret < 0) { | |
e6142f2e | 4442 | ERR("Unable to set permissions on %s", config.health_unix_sock_path.value); |
6c71277b | 4443 | PERROR("chmod"); |
6c71277b MD |
4444 | goto error; |
4445 | } | |
4446 | } | |
4447 | ||
b662582b DG |
4448 | /* |
4449 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4450 | * show must go on. | |
4451 | */ | |
4452 | (void) utils_set_fd_cloexec(sock); | |
4453 | ||
44a5e5eb DG |
4454 | ret = lttcomm_listen_unix_sock(sock); |
4455 | if (ret < 0) { | |
4456 | goto error; | |
4457 | } | |
4458 | ||
4459 | /* | |
4460 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4461 | * more will be added to this poll set. | |
4462 | */ | |
d0b96690 | 4463 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
4464 | if (ret < 0) { |
4465 | goto error; | |
4466 | } | |
4467 | ||
4468 | /* Add the application registration socket */ | |
4469 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
4470 | if (ret < 0) { | |
4471 | goto error; | |
4472 | } | |
4473 | ||
ef367a93 | 4474 | sessiond_notify_ready(); |
97bc1426 | 4475 | |
44a5e5eb DG |
4476 | while (1) { |
4477 | DBG("Health check ready"); | |
4478 | ||
44a5e5eb DG |
4479 | /* Inifinite blocking call, waiting for transmission */ |
4480 | restart: | |
4481 | ret = lttng_poll_wait(&events, -1); | |
4482 | if (ret < 0) { | |
4483 | /* | |
4484 | * Restart interrupted system call. | |
4485 | */ | |
4486 | if (errno == EINTR) { | |
4487 | goto restart; | |
4488 | } | |
4489 | goto error; | |
4490 | } | |
4491 | ||
0d9c5d77 DG |
4492 | nb_fd = ret; |
4493 | ||
44a5e5eb DG |
4494 | for (i = 0; i < nb_fd; i++) { |
4495 | /* Fetch once the poll data */ | |
4496 | revents = LTTNG_POLL_GETEV(&events, i); | |
4497 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4498 | ||
fd20dac9 MD |
4499 | if (!revents) { |
4500 | /* No activity for this FD (poll implementation). */ | |
4501 | continue; | |
4502 | } | |
4503 | ||
44a5e5eb | 4504 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4505 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 4506 | if (ret) { |
139ac872 MD |
4507 | err = 0; |
4508 | goto exit; | |
44a5e5eb DG |
4509 | } |
4510 | ||
4511 | /* Event on the registration socket */ | |
4512 | if (pollfd == sock) { | |
03e43155 MD |
4513 | if (revents & LPOLLIN) { |
4514 | continue; | |
4515 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
44a5e5eb DG |
4516 | ERR("Health socket poll error"); |
4517 | goto error; | |
03e43155 MD |
4518 | } else { |
4519 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4520 | goto error; | |
44a5e5eb DG |
4521 | } |
4522 | } | |
4523 | } | |
4524 | ||
4525 | new_sock = lttcomm_accept_unix_sock(sock); | |
4526 | if (new_sock < 0) { | |
4527 | goto error; | |
4528 | } | |
4529 | ||
b662582b DG |
4530 | /* |
4531 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4532 | * show must go on. | |
4533 | */ | |
4534 | (void) utils_set_fd_cloexec(new_sock); | |
4535 | ||
44a5e5eb DG |
4536 | DBG("Receiving data from client for health..."); |
4537 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
4538 | if (ret <= 0) { | |
4539 | DBG("Nothing recv() from client... continuing"); | |
4540 | ret = close(new_sock); | |
4541 | if (ret) { | |
4542 | PERROR("close"); | |
4543 | } | |
44a5e5eb DG |
4544 | continue; |
4545 | } | |
4546 | ||
4547 | rcu_thread_online(); | |
4548 | ||
53efb85a | 4549 | memset(&reply, 0, sizeof(reply)); |
6c71277b MD |
4550 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { |
4551 | /* | |
4552 | * health_check_state returns 0 if health is | |
4553 | * bad. | |
4554 | */ | |
4555 | if (!health_check_state(health_sessiond, i)) { | |
4556 | reply.ret_code |= 1ULL << i; | |
4557 | } | |
44a5e5eb DG |
4558 | } |
4559 | ||
6c71277b | 4560 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
4561 | |
4562 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
4563 | if (ret < 0) { | |
4564 | ERR("Failed to send health data back to client"); | |
4565 | } | |
4566 | ||
4567 | /* End of transmission */ | |
4568 | ret = close(new_sock); | |
4569 | if (ret) { | |
4570 | PERROR("close"); | |
4571 | } | |
44a5e5eb DG |
4572 | } |
4573 | ||
139ac872 | 4574 | exit: |
44a5e5eb | 4575 | error: |
139ac872 MD |
4576 | if (err) { |
4577 | ERR("Health error occurred in %s", __func__); | |
4578 | } | |
44a5e5eb | 4579 | DBG("Health check thread dying"); |
e6142f2e | 4580 | unlink(config.health_unix_sock_path.value); |
44a5e5eb DG |
4581 | if (sock >= 0) { |
4582 | ret = close(sock); | |
4583 | if (ret) { | |
4584 | PERROR("close"); | |
4585 | } | |
4586 | } | |
44a5e5eb DG |
4587 | |
4588 | lttng_poll_clean(&events); | |
b11d6a7f | 4589 | stop_threads(); |
44a5e5eb DG |
4590 | rcu_unregister_thread(); |
4591 | return NULL; | |
4592 | } | |
4593 | ||
1d4b027a | 4594 | /* |
d063d709 DG |
4595 | * This thread manage all clients request using the unix client socket for |
4596 | * communication. | |
1d4b027a DG |
4597 | */ |
4598 | static void *thread_manage_clients(void *data) | |
4599 | { | |
139ac872 | 4600 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 4601 | int sock_error; |
5eb91c98 | 4602 | uint32_t revents, nb_fd; |
273ea72c | 4603 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 4604 | struct lttng_poll_event events; |
1d4b027a DG |
4605 | |
4606 | DBG("[thread] Manage client started"); | |
4607 | ||
f6a9efaa DG |
4608 | rcu_register_thread(); |
4609 | ||
6c71277b | 4610 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 4611 | |
840cb59c | 4612 | health_code_update(); |
44a5e5eb | 4613 | |
1d4b027a DG |
4614 | ret = lttcomm_listen_unix_sock(client_sock); |
4615 | if (ret < 0) { | |
35df2755 | 4616 | goto error_listen; |
1d4b027a DG |
4617 | } |
4618 | ||
5eb91c98 DG |
4619 | /* |
4620 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4621 | * more will be added to this poll set. | |
4622 | */ | |
d0b96690 | 4623 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 4624 | if (ret < 0) { |
35df2755 | 4625 | goto error_create_poll; |
5eb91c98 | 4626 | } |
273ea72c | 4627 | |
5eb91c98 DG |
4628 | /* Add the application registration socket */ |
4629 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
4630 | if (ret < 0) { | |
4631 | goto error; | |
4632 | } | |
273ea72c | 4633 | |
ef367a93 JG |
4634 | ret = sem_post(&load_info->message_thread_ready); |
4635 | if (ret) { | |
4636 | PERROR("sem_post message_thread_ready"); | |
4637 | goto error; | |
4638 | } | |
0bb7724a | 4639 | |
f28f9e44 JG |
4640 | /* |
4641 | * Wait until all support threads are initialized before accepting | |
4642 | * commands. | |
4643 | */ | |
4644 | while (uatomic_read(<tng_sessiond_ready) != 0) { | |
4645 | fd_set read_fds; | |
4646 | struct timeval timeout; | |
4647 | ||
4648 | FD_ZERO(&read_fds); | |
4649 | FD_SET(thread_quit_pipe[0], &read_fds); | |
4650 | memset(&timeout, 0, sizeof(timeout)); | |
4651 | timeout.tv_usec = 1000; | |
4652 | ||
4653 | /* | |
4654 | * If a support thread failed to launch, it may signal that | |
4655 | * we must exit and the sessiond would never be marked as | |
4656 | * "ready". | |
4657 | * | |
4658 | * The timeout is set to 1ms, which serves as a way to | |
4659 | * pace down this check. | |
4660 | */ | |
4661 | ret = select(thread_quit_pipe[0] + 1, &read_fds, NULL, NULL, | |
4662 | &timeout); | |
4663 | if (ret > 0 || (ret < 0 && errno != EINTR)) { | |
4664 | goto exit; | |
4665 | } | |
4666 | } | |
8b0d4636 JG |
4667 | /* |
4668 | * This barrier is paired with the one in sessiond_notify_ready() to | |
4669 | * ensure that loads accessing data initialized by the other threads, | |
4670 | * on which this thread was waiting, are not performed before this point. | |
4671 | * | |
4672 | * Note that this could be a 'read' memory barrier, but a full barrier | |
4673 | * is used in case the code changes. The performance implications of | |
4674 | * this choice are minimal since this is a slow path. | |
4675 | */ | |
4676 | cmm_smp_mb(); | |
f28f9e44 | 4677 | |
72453c8c MD |
4678 | /* This testpoint is after we signal readiness to the parent. */ |
4679 | if (testpoint(sessiond_thread_manage_clients)) { | |
4680 | goto error; | |
4681 | } | |
4682 | ||
e547b070 | 4683 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
4684 | goto error; |
4685 | } | |
8ac94142 | 4686 | |
840cb59c | 4687 | health_code_update(); |
44a5e5eb | 4688 | |
1d4b027a | 4689 | while (1) { |
a503e1ef JG |
4690 | const struct cmd_completion_handler *cmd_completion_handler; |
4691 | ||
1d4b027a | 4692 | DBG("Accepting client command ..."); |
273ea72c DG |
4693 | |
4694 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 4695 | restart: |
a78af745 | 4696 | health_poll_entry(); |
5eb91c98 | 4697 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 4698 | health_poll_exit(); |
273ea72c | 4699 | if (ret < 0) { |
88f2b785 MD |
4700 | /* |
4701 | * Restart interrupted system call. | |
4702 | */ | |
4703 | if (errno == EINTR) { | |
4704 | goto restart; | |
4705 | } | |
273ea72c DG |
4706 | goto error; |
4707 | } | |
4708 | ||
0d9c5d77 DG |
4709 | nb_fd = ret; |
4710 | ||
5eb91c98 DG |
4711 | for (i = 0; i < nb_fd; i++) { |
4712 | /* Fetch once the poll data */ | |
4713 | revents = LTTNG_POLL_GETEV(&events, i); | |
4714 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4715 | ||
840cb59c | 4716 | health_code_update(); |
44a5e5eb | 4717 | |
fd20dac9 MD |
4718 | if (!revents) { |
4719 | /* No activity for this FD (poll implementation). */ | |
4720 | continue; | |
4721 | } | |
4722 | ||
5eb91c98 | 4723 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4724 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 4725 | if (ret) { |
139ac872 MD |
4726 | err = 0; |
4727 | goto exit; | |
5eb91c98 DG |
4728 | } |
4729 | ||
4730 | /* Event on the registration socket */ | |
4731 | if (pollfd == client_sock) { | |
03e43155 MD |
4732 | if (revents & LPOLLIN) { |
4733 | continue; | |
4734 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
5eb91c98 DG |
4735 | ERR("Client socket poll error"); |
4736 | goto error; | |
03e43155 MD |
4737 | } else { |
4738 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4739 | goto error; | |
5eb91c98 DG |
4740 | } |
4741 | } | |
4742 | } | |
4743 | ||
4744 | DBG("Wait for client response"); | |
4745 | ||
840cb59c | 4746 | health_code_update(); |
44a5e5eb | 4747 | |
5eb91c98 DG |
4748 | sock = lttcomm_accept_unix_sock(client_sock); |
4749 | if (sock < 0) { | |
273ea72c | 4750 | goto error; |
273ea72c DG |
4751 | } |
4752 | ||
b662582b DG |
4753 | /* |
4754 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4755 | * show must go on. | |
4756 | */ | |
4757 | (void) utils_set_fd_cloexec(sock); | |
4758 | ||
be040666 DG |
4759 | /* Set socket option for credentials retrieval */ |
4760 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
4761 | if (ret < 0) { | |
4762 | goto error; | |
4763 | } | |
4764 | ||
5eb91c98 | 4765 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 4766 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 4767 | if (cmd_ctx == NULL) { |
76d7553f | 4768 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 4769 | goto error; |
5eb91c98 | 4770 | } |
1d4b027a | 4771 | |
5eb91c98 | 4772 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 4773 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 4774 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 4775 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
4776 | goto error; |
4777 | } | |
1d4b027a | 4778 | |
5eb91c98 DG |
4779 | cmd_ctx->llm = NULL; |
4780 | cmd_ctx->session = NULL; | |
1d4b027a | 4781 | |
840cb59c | 4782 | health_code_update(); |
44a5e5eb | 4783 | |
5eb91c98 DG |
4784 | /* |
4785 | * Data is received from the lttng client. The struct | |
4786 | * lttcomm_session_msg (lsm) contains the command and data request of | |
4787 | * the client. | |
4788 | */ | |
4789 | DBG("Receiving data from client ..."); | |
be040666 DG |
4790 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
4791 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
4792 | if (ret <= 0) { |
4793 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
4794 | ret = close(sock); |
4795 | if (ret) { | |
4796 | PERROR("close"); | |
4797 | } | |
4798 | sock = -1; | |
a2c0da86 | 4799 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4800 | continue; |
4801 | } | |
1d4b027a | 4802 | |
840cb59c | 4803 | health_code_update(); |
44a5e5eb | 4804 | |
5eb91c98 DG |
4805 | // TODO: Validate cmd_ctx including sanity check for |
4806 | // security purpose. | |
f7776ea7 | 4807 | |
f6a9efaa | 4808 | rcu_thread_online(); |
5eb91c98 DG |
4809 | /* |
4810 | * This function dispatch the work to the kernel or userspace tracer | |
4811 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
4812 | * informations for the client. The command context struct contains | |
4813 | * everything this function may needs. | |
4814 | */ | |
53a80697 | 4815 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 4816 | rcu_thread_offline(); |
5eb91c98 | 4817 | if (ret < 0) { |
36134aa1 DG |
4818 | ret = close(sock); |
4819 | if (ret) { | |
4820 | PERROR("close"); | |
53a80697 | 4821 | } |
36134aa1 | 4822 | sock = -1; |
bbd973c2 | 4823 | /* |
5eb91c98 | 4824 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 4825 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
4826 | * (ENOMEM). Error detected but still accept |
4827 | * command, unless a socket error has been | |
4828 | * detected. | |
bbd973c2 | 4829 | */ |
bbd973c2 | 4830 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4831 | continue; |
4832 | } | |
d6e4fca4 | 4833 | |
a503e1ef JG |
4834 | cmd_completion_handler = cmd_pop_completion_handler(); |
4835 | if (cmd_completion_handler) { | |
4836 | enum lttng_error_code completion_code; | |
4837 | ||
4838 | completion_code = cmd_completion_handler->run( | |
4839 | cmd_completion_handler->data); | |
4840 | if (completion_code != LTTNG_OK) { | |
4841 | clean_command_ctx(&cmd_ctx); | |
4842 | continue; | |
4843 | } | |
4844 | } | |
4845 | ||
840cb59c | 4846 | health_code_update(); |
44a5e5eb | 4847 | |
a1ac8b97 | 4848 | DBG("Sending response (size: %d, retcode: %s (%d))", |
54d01ffb | 4849 | cmd_ctx->lttng_msg_size, |
a1ac8b97 JG |
4850 | lttng_strerror(-cmd_ctx->llm->ret_code), |
4851 | cmd_ctx->llm->ret_code); | |
54d01ffb | 4852 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
4853 | if (ret < 0) { |
4854 | ERR("Failed to send data back to client"); | |
bbd973c2 | 4855 | } |
1d4b027a | 4856 | |
5eb91c98 | 4857 | /* End of transmission */ |
76d7553f MD |
4858 | ret = close(sock); |
4859 | if (ret) { | |
4860 | PERROR("close"); | |
4861 | } | |
4862 | sock = -1; | |
be040666 DG |
4863 | |
4864 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 4865 | |
840cb59c | 4866 | health_code_update(); |
273ea72c DG |
4867 | } |
4868 | ||
139ac872 | 4869 | exit: |
5eb91c98 | 4870 | error: |
35df2755 CB |
4871 | if (sock >= 0) { |
4872 | ret = close(sock); | |
4873 | if (ret) { | |
4874 | PERROR("close"); | |
4875 | } | |
139ac872 | 4876 | } |
44a5e5eb | 4877 | |
35df2755 CB |
4878 | lttng_poll_clean(&events); |
4879 | clean_command_ctx(&cmd_ctx); | |
4880 | ||
4881 | error_listen: | |
4882 | error_create_poll: | |
e6142f2e | 4883 | unlink(config.client_unix_sock_path.value); |
76d7553f MD |
4884 | if (client_sock >= 0) { |
4885 | ret = close(client_sock); | |
4886 | if (ret) { | |
4887 | PERROR("close"); | |
4888 | } | |
a4b35e07 | 4889 | } |
35df2755 CB |
4890 | |
4891 | if (err) { | |
840cb59c | 4892 | health_error(); |
35df2755 | 4893 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4894 | } |
273ea72c | 4895 | |
8782cc74 | 4896 | health_unregister(health_sessiond); |
35df2755 CB |
4897 | |
4898 | DBG("Client thread dying"); | |
f6a9efaa DG |
4899 | |
4900 | rcu_unregister_thread(); | |
4a15001e MD |
4901 | |
4902 | /* | |
4903 | * Since we are creating the consumer threads, we own them, so we need | |
4904 | * to join them before our thread exits. | |
4905 | */ | |
4906 | ret = join_consumer_thread(&kconsumer_data); | |
4907 | if (ret) { | |
4908 | errno = ret; | |
4909 | PERROR("join_consumer"); | |
4910 | } | |
4911 | ||
4912 | ret = join_consumer_thread(&ustconsumer32_data); | |
4913 | if (ret) { | |
4914 | errno = ret; | |
4915 | PERROR("join_consumer ust32"); | |
4916 | } | |
4917 | ||
4918 | ret = join_consumer_thread(&ustconsumer64_data); | |
4919 | if (ret) { | |
4920 | errno = ret; | |
4921 | PERROR("join_consumer ust64"); | |
4922 | } | |
1d4b027a DG |
4923 | return NULL; |
4924 | } | |
4925 | ||
c0232ea5 JG |
4926 | static int string_match(const char *str1, const char *str2) |
4927 | { | |
4928 | return (str1 && str2) && !strcmp(str1, str2); | |
4929 | } | |
4930 | ||
fac6795d | 4931 | /* |
26296c48 JG |
4932 | * Take an option from the getopt output and set it in the right variable to be |
4933 | * used later. | |
4934 | * | |
4935 | * Return 0 on success else a negative value. | |
fac6795d | 4936 | */ |
26296c48 | 4937 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4938 | { |
26296c48 | 4939 | int ret = 0; |
fac6795d | 4940 | |
c0232ea5 | 4941 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
4942 | if (!arg || *arg == '\0') { |
4943 | ret = -EINVAL; | |
4944 | goto end; | |
4945 | } | |
e8fa9fb0 MD |
4946 | if (lttng_is_setuid_setgid()) { |
4947 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4948 | "-c, --client-sock"); | |
4949 | } else { | |
e6142f2e JG |
4950 | config_string_set(&config.client_unix_sock_path, |
4951 | strdup(arg)); | |
4952 | if (!config.client_unix_sock_path.value) { | |
4953 | ret = -ENOMEM; | |
4954 | PERROR("strdup"); | |
4955 | } | |
e8fa9fb0 | 4956 | } |
c0232ea5 | 4957 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
4958 | if (!arg || *arg == '\0') { |
4959 | ret = -EINVAL; | |
4960 | goto end; | |
4961 | } | |
e8fa9fb0 MD |
4962 | if (lttng_is_setuid_setgid()) { |
4963 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4964 | "-a, --apps-sock"); | |
4965 | } else { | |
e6142f2e JG |
4966 | config_string_set(&config.apps_unix_sock_path, |
4967 | strdup(arg)); | |
4968 | if (!config.apps_unix_sock_path.value) { | |
4969 | ret = -ENOMEM; | |
4970 | PERROR("strdup"); | |
4971 | } | |
e8fa9fb0 | 4972 | } |
c0232ea5 | 4973 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
e6142f2e | 4974 | config.daemonize = true; |
c0232ea5 | 4975 | } else if (string_match(optname, "background") || opt == 'b') { |
e6142f2e | 4976 | config.background = true; |
c0232ea5 | 4977 | } else if (string_match(optname, "group") || opt == 'g') { |
66b2ce8e JG |
4978 | if (!arg || *arg == '\0') { |
4979 | ret = -EINVAL; | |
4980 | goto end; | |
4981 | } | |
e8fa9fb0 MD |
4982 | if (lttng_is_setuid_setgid()) { |
4983 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4984 | "-g, --group"); | |
4985 | } else { | |
e6142f2e JG |
4986 | config_string_set(&config.tracing_group_name, |
4987 | strdup(arg)); | |
4988 | if (!config.tracing_group_name.value) { | |
e8fa9fb0 | 4989 | ret = -ENOMEM; |
e6142f2e | 4990 | PERROR("strdup"); |
e8fa9fb0 | 4991 | } |
db322c4d | 4992 | } |
c0232ea5 | 4993 | } else if (string_match(optname, "help") || opt == 'h') { |
4fc83d94 | 4994 | ret = utils_show_help(8, "lttng-sessiond", help_msg); |
8190767e | 4995 | if (ret) { |
4fc83d94 | 4996 | ERR("Cannot show --help for `lttng-sessiond`"); |
8190767e PP |
4997 | perror("exec"); |
4998 | } | |
4999 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 5000 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
5001 | fprintf(stdout, "%s\n", VERSION); |
5002 | exit(EXIT_SUCCESS); | |
c0232ea5 | 5003 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
e6142f2e | 5004 | config.sig_parent = true; |
c0232ea5 | 5005 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
66b2ce8e JG |
5006 | if (!arg || *arg == '\0') { |
5007 | ret = -EINVAL; | |
5008 | goto end; | |
5009 | } | |
e8fa9fb0 MD |
5010 | if (lttng_is_setuid_setgid()) { |
5011 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5012 | "--kconsumerd-err-sock"); | |
5013 | } else { | |
e6142f2e JG |
5014 | config_string_set(&config.kconsumerd_err_unix_sock_path, |
5015 | strdup(arg)); | |
5016 | if (!config.kconsumerd_err_unix_sock_path.value) { | |
5017 | ret = -ENOMEM; | |
5018 | PERROR("strdup"); | |
5019 | } | |
e8fa9fb0 | 5020 | } |
c0232ea5 | 5021 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
5022 | if (!arg || *arg == '\0') { |
5023 | ret = -EINVAL; | |
5024 | goto end; | |
5025 | } | |
e8fa9fb0 MD |
5026 | if (lttng_is_setuid_setgid()) { |
5027 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5028 | "--kconsumerd-cmd-sock"); | |
5029 | } else { | |
e6142f2e JG |
5030 | config_string_set(&config.kconsumerd_cmd_unix_sock_path, |
5031 | strdup(arg)); | |
5032 | if (!config.kconsumerd_cmd_unix_sock_path.value) { | |
5033 | ret = -ENOMEM; | |
5034 | PERROR("strdup"); | |
5035 | } | |
e8fa9fb0 | 5036 | } |
c0232ea5 | 5037 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e JG |
5038 | if (!arg || *arg == '\0') { |
5039 | ret = -EINVAL; | |
5040 | goto end; | |
5041 | } | |
e8fa9fb0 MD |
5042 | if (lttng_is_setuid_setgid()) { |
5043 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5044 | "--ustconsumerd64-err-sock"); | |
5045 | } else { | |
e6142f2e JG |
5046 | config_string_set(&config.consumerd64_err_unix_sock_path, |
5047 | strdup(arg)); | |
5048 | if (!config.consumerd64_err_unix_sock_path.value) { | |
5049 | ret = -ENOMEM; | |
5050 | PERROR("strdup"); | |
5051 | } | |
e8fa9fb0 | 5052 | } |
c0232ea5 | 5053 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
66b2ce8e JG |
5054 | if (!arg || *arg == '\0') { |
5055 | ret = -EINVAL; | |
5056 | goto end; | |
5057 | } | |
e8fa9fb0 MD |
5058 | if (lttng_is_setuid_setgid()) { |
5059 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5060 | "--ustconsumerd64-cmd-sock"); | |
5061 | } else { | |
e6142f2e JG |
5062 | config_string_set(&config.consumerd64_cmd_unix_sock_path, |
5063 | strdup(arg)); | |
5064 | if (!config.consumerd64_cmd_unix_sock_path.value) { | |
5065 | ret = -ENOMEM; | |
5066 | PERROR("strdup"); | |
5067 | } | |
e8fa9fb0 | 5068 | } |
c0232ea5 | 5069 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
66b2ce8e JG |
5070 | if (!arg || *arg == '\0') { |
5071 | ret = -EINVAL; | |
5072 | goto end; | |
5073 | } | |
e8fa9fb0 MD |
5074 | if (lttng_is_setuid_setgid()) { |
5075 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5076 | "--ustconsumerd32-err-sock"); | |
5077 | } else { | |
e6142f2e JG |
5078 | config_string_set(&config.consumerd32_err_unix_sock_path, |
5079 | strdup(arg)); | |
5080 | if (!config.consumerd32_err_unix_sock_path.value) { | |
5081 | ret = -ENOMEM; | |
5082 | PERROR("strdup"); | |
5083 | } | |
e8fa9fb0 | 5084 | } |
c0232ea5 | 5085 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
66b2ce8e JG |
5086 | if (!arg || *arg == '\0') { |
5087 | ret = -EINVAL; | |
5088 | goto end; | |
5089 | } | |
e8fa9fb0 MD |
5090 | if (lttng_is_setuid_setgid()) { |
5091 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5092 | "--ustconsumerd32-cmd-sock"); | |
5093 | } else { | |
e6142f2e JG |
5094 | config_string_set(&config.consumerd32_cmd_unix_sock_path, |
5095 | strdup(arg)); | |
5096 | if (!config.consumerd32_cmd_unix_sock_path.value) { | |
5097 | ret = -ENOMEM; | |
5098 | PERROR("strdup"); | |
5099 | } | |
e8fa9fb0 | 5100 | } |
c0232ea5 | 5101 | } else if (string_match(optname, "no-kernel")) { |
e6142f2e | 5102 | config.no_kernel = true; |
c0232ea5 | 5103 | } else if (string_match(optname, "quiet") || opt == 'q') { |
6d9a9c65 | 5104 | config.quiet = true; |
c0232ea5 | 5105 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
5106 | /* Verbose level can increase using multiple -v */ |
5107 | if (arg) { | |
13755a18 | 5108 | /* Value obtained from config file */ |
e6142f2e | 5109 | config.verbose = config_parse_value(arg); |
26296c48 | 5110 | } else { |
13755a18 | 5111 | /* -v used on command line */ |
e6142f2e | 5112 | config.verbose++; |
26296c48 | 5113 | } |
13755a18 | 5114 | /* Clamp value to [0, 3] */ |
e6142f2e JG |
5115 | config.verbose = config.verbose < 0 ? 0 : |
5116 | (config.verbose <= 3 ? config.verbose : 3); | |
c0232ea5 | 5117 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 | 5118 | if (arg) { |
e6142f2e | 5119 | config.verbose_consumer = config_parse_value(arg); |
26296c48 | 5120 | } else { |
e6142f2e | 5121 | config.verbose_consumer++; |
26296c48 | 5122 | } |
c0232ea5 | 5123 | } else if (string_match(optname, "consumerd32-path")) { |
66b2ce8e JG |
5124 | if (!arg || *arg == '\0') { |
5125 | ret = -EINVAL; | |
5126 | goto end; | |
5127 | } | |
e8fa9fb0 MD |
5128 | if (lttng_is_setuid_setgid()) { |
5129 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5130 | "--consumerd32-path"); | |
5131 | } else { | |
e6142f2e JG |
5132 | config_string_set(&config.consumerd32_bin_path, |
5133 | strdup(arg)); | |
5134 | if (!config.consumerd32_bin_path.value) { | |
e8fa9fb0 MD |
5135 | PERROR("strdup"); |
5136 | ret = -ENOMEM; | |
5137 | } | |
db322c4d | 5138 | } |
c0232ea5 | 5139 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
5140 | if (!arg || *arg == '\0') { |
5141 | ret = -EINVAL; | |
5142 | goto end; | |
5143 | } | |
e8fa9fb0 MD |
5144 | if (lttng_is_setuid_setgid()) { |
5145 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5146 | "--consumerd32-libdir"); | |
5147 | } else { | |
e6142f2e JG |
5148 | config_string_set(&config.consumerd32_lib_dir, |
5149 | strdup(arg)); | |
5150 | if (!config.consumerd32_lib_dir.value) { | |
e8fa9fb0 MD |
5151 | PERROR("strdup"); |
5152 | ret = -ENOMEM; | |
5153 | } | |
db322c4d | 5154 | } |
c0232ea5 | 5155 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
5156 | if (!arg || *arg == '\0') { |
5157 | ret = -EINVAL; | |
5158 | goto end; | |
5159 | } | |
e8fa9fb0 MD |
5160 | if (lttng_is_setuid_setgid()) { |
5161 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5162 | "--consumerd64-path"); | |
5163 | } else { | |
e6142f2e JG |
5164 | config_string_set(&config.consumerd64_bin_path, |
5165 | strdup(arg)); | |
5166 | if (!config.consumerd64_bin_path.value) { | |
e8fa9fb0 MD |
5167 | PERROR("strdup"); |
5168 | ret = -ENOMEM; | |
5169 | } | |
db322c4d | 5170 | } |
c0232ea5 | 5171 | } else if (string_match(optname, "consumerd64-libdir")) { |
66b2ce8e JG |
5172 | if (!arg || *arg == '\0') { |
5173 | ret = -EINVAL; | |
5174 | goto end; | |
5175 | } | |
e8fa9fb0 MD |
5176 | if (lttng_is_setuid_setgid()) { |
5177 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5178 | "--consumerd64-libdir"); | |
5179 | } else { | |
e6142f2e JG |
5180 | config_string_set(&config.consumerd64_lib_dir, |
5181 | strdup(arg)); | |
5182 | if (!config.consumerd64_lib_dir.value) { | |
e8fa9fb0 MD |
5183 | PERROR("strdup"); |
5184 | ret = -ENOMEM; | |
5185 | } | |
db322c4d | 5186 | } |
c0232ea5 | 5187 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
66b2ce8e JG |
5188 | if (!arg || *arg == '\0') { |
5189 | ret = -EINVAL; | |
5190 | goto end; | |
5191 | } | |
e8fa9fb0 MD |
5192 | if (lttng_is_setuid_setgid()) { |
5193 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5194 | "-p, --pidfile"); | |
5195 | } else { | |
e6142f2e JG |
5196 | config_string_set(&config.pid_file_path, strdup(arg)); |
5197 | if (!config.pid_file_path.value) { | |
e8fa9fb0 MD |
5198 | PERROR("strdup"); |
5199 | ret = -ENOMEM; | |
5200 | } | |
db322c4d | 5201 | } |
c0232ea5 | 5202 | } else if (string_match(optname, "agent-tcp-port")) { |
66b2ce8e JG |
5203 | if (!arg || *arg == '\0') { |
5204 | ret = -EINVAL; | |
5205 | goto end; | |
5206 | } | |
e8fa9fb0 MD |
5207 | if (lttng_is_setuid_setgid()) { |
5208 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5209 | "--agent-tcp-port"); | |
5210 | } else { | |
5211 | unsigned long v; | |
4d076222 | 5212 | |
e8fa9fb0 MD |
5213 | errno = 0; |
5214 | v = strtoul(arg, NULL, 0); | |
5215 | if (errno != 0 || !isdigit(arg[0])) { | |
5216 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
5217 | return -1; | |
5218 | } | |
5219 | if (v == 0 || v >= 65535) { | |
5220 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
5221 | return -1; | |
5222 | } | |
2288467f JG |
5223 | config.agent_tcp_port.begin = config.agent_tcp_port.end = (int) v; |
5224 | DBG3("Agent TCP port set to non default: %i", (int) v); | |
26296c48 | 5225 | } |
c0232ea5 | 5226 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
5227 | if (!arg || *arg == '\0') { |
5228 | ret = -EINVAL; | |
5229 | goto end; | |
5230 | } | |
e8fa9fb0 MD |
5231 | if (lttng_is_setuid_setgid()) { |
5232 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5233 | "-l, --load"); | |
5234 | } else { | |
e6142f2e JG |
5235 | config_string_set(&config.load_session_path, strdup(arg)); |
5236 | if (!config.load_session_path.value) { | |
e8fa9fb0 MD |
5237 | PERROR("strdup"); |
5238 | ret = -ENOMEM; | |
5239 | } | |
ef367a93 | 5240 | } |
c0232ea5 | 5241 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
5242 | if (!arg || *arg == '\0') { |
5243 | ret = -EINVAL; | |
5244 | goto end; | |
5245 | } | |
e8fa9fb0 MD |
5246 | if (lttng_is_setuid_setgid()) { |
5247 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5248 | "--kmod-probes"); | |
5249 | } else { | |
e6142f2e JG |
5250 | config_string_set(&config.kmod_probes_list, strdup(arg)); |
5251 | if (!config.kmod_probes_list.value) { | |
e8fa9fb0 MD |
5252 | PERROR("strdup"); |
5253 | ret = -ENOMEM; | |
5254 | } | |
c9d42407 | 5255 | } |
c0232ea5 | 5256 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
5257 | if (!arg || *arg == '\0') { |
5258 | ret = -EINVAL; | |
5259 | goto end; | |
5260 | } | |
e8fa9fb0 MD |
5261 | if (lttng_is_setuid_setgid()) { |
5262 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5263 | "--extra-kmod-probes"); | |
5264 | } else { | |
e6142f2e JG |
5265 | config_string_set(&config.kmod_extra_probes_list, |
5266 | strdup(arg)); | |
5267 | if (!config.kmod_extra_probes_list.value) { | |
e8fa9fb0 MD |
5268 | PERROR("strdup"); |
5269 | ret = -ENOMEM; | |
5270 | } | |
db322c4d | 5271 | } |
c0232ea5 JG |
5272 | } else if (string_match(optname, "config") || opt == 'f') { |
5273 | /* This is handled in set_options() thus silent skip. */ | |
5274 | goto end; | |
5275 | } else { | |
26296c48 JG |
5276 | /* Unknown option or other error. |
5277 | * Error is printed by getopt, just return */ | |
5278 | ret = -1; | |
5279 | } | |
5280 | ||
f3dd7ce7 | 5281 | end: |
c5d350b2 JG |
5282 | if (ret == -EINVAL) { |
5283 | const char *opt_name = "unknown"; | |
5284 | int i; | |
5285 | ||
5286 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
5287 | i++) { | |
5288 | if (opt == long_options[i].val) { | |
5289 | opt_name = long_options[i].name; | |
5290 | break; | |
5291 | } | |
5292 | } | |
5293 | ||
5294 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
5295 | opt_name); | |
5296 | } | |
f3dd7ce7 | 5297 | |
26296c48 JG |
5298 | return ret; |
5299 | } | |
5300 | ||
5301 | /* | |
5302 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 5303 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
5304 | * return value conventions. |
5305 | */ | |
5306 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
5307 | { | |
5308 | int ret = 0, i; | |
5309 | ||
5310 | if (!entry || !entry->name || !entry->value) { | |
5311 | ret = -EINVAL; | |
5312 | goto end; | |
5313 | } | |
5314 | ||
5315 | /* Check if the option is to be ignored */ | |
5316 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
5317 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
5318 | goto end; | |
5319 | } | |
5320 | } | |
5321 | ||
5322 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
5323 | i++) { | |
5324 | ||
5325 | /* Ignore if not fully matched. */ | |
5326 | if (strcmp(entry->name, long_options[i].name)) { | |
5327 | continue; | |
5328 | } | |
5329 | ||
5330 | /* | |
5331 | * If the option takes no argument on the command line, we have to | |
5332 | * check if the value is "true". We support non-zero numeric values, | |
5333 | * true, on and yes. | |
5334 | */ | |
5335 | if (!long_options[i].has_arg) { | |
5336 | ret = config_parse_value(entry->value); | |
5337 | if (ret <= 0) { | |
5338 | if (ret) { | |
5339 | WARN("Invalid configuration value \"%s\" for option %s", | |
5340 | entry->value, entry->name); | |
5341 | } | |
5342 | /* False, skip boolean config option. */ | |
5343 | goto end; | |
4d076222 | 5344 | } |
26296c48 JG |
5345 | } |
5346 | ||
5347 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
5348 | goto end; | |
5349 | } | |
5350 | ||
5351 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
5352 | ||
5353 | end: | |
5354 | return ret; | |
5355 | } | |
5356 | ||
5357 | /* | |
5358 | * daemon configuration loading and argument parsing | |
5359 | */ | |
5360 | static int set_options(int argc, char **argv) | |
5361 | { | |
5362 | int ret = 0, c = 0, option_index = 0; | |
5363 | int orig_optopt = optopt, orig_optind = optind; | |
5364 | char *optstring; | |
5365 | const char *config_path = NULL; | |
5366 | ||
5367 | optstring = utils_generate_optstring(long_options, | |
5368 | sizeof(long_options) / sizeof(struct option)); | |
5369 | if (!optstring) { | |
5370 | ret = -ENOMEM; | |
5371 | goto end; | |
5372 | } | |
5373 | ||
5374 | /* Check for the --config option */ | |
5375 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
5376 | &option_index)) != -1) { | |
5377 | if (c == '?') { | |
5378 | ret = -EINVAL; | |
5379 | goto end; | |
5380 | } else if (c != 'f') { | |
5381 | /* if not equal to --config option. */ | |
5382 | continue; | |
5383 | } | |
5384 | ||
e8fa9fb0 MD |
5385 | if (lttng_is_setuid_setgid()) { |
5386 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5387 | "-f, --config"); | |
5388 | } else { | |
5389 | config_path = utils_expand_path(optarg); | |
5390 | if (!config_path) { | |
5391 | ERR("Failed to resolve path: %s", optarg); | |
5392 | } | |
26296c48 JG |
5393 | } |
5394 | } | |
5395 | ||
5396 | ret = config_get_section_entries(config_path, config_section_name, | |
5397 | config_entry_handler, NULL); | |
5398 | if (ret) { | |
5399 | if (ret > 0) { | |
5400 | ERR("Invalid configuration option at line %i", ret); | |
5401 | ret = -1; | |
5402 | } | |
5403 | goto end; | |
5404 | } | |
5405 | ||
5406 | /* Reset getopt's global state */ | |
5407 | optopt = orig_optopt; | |
5408 | optind = orig_optind; | |
5409 | while (1) { | |
c0232ea5 JG |
5410 | option_index = -1; |
5411 | /* | |
5412 | * getopt_long() will not set option_index if it encounters a | |
5413 | * short option. | |
5414 | */ | |
5415 | c = getopt_long(argc, argv, optstring, long_options, | |
5416 | &option_index); | |
26296c48 | 5417 | if (c == -1) { |
4d076222 DG |
5418 | break; |
5419 | } | |
26296c48 | 5420 | |
c0232ea5 JG |
5421 | /* |
5422 | * Pass NULL as the long option name if popt left the index | |
5423 | * unset. | |
5424 | */ | |
5425 | ret = set_option(c, optarg, | |
5426 | option_index < 0 ? NULL : | |
5427 | long_options[option_index].name); | |
26296c48 JG |
5428 | if (ret < 0) { |
5429 | break; | |
fac6795d DG |
5430 | } |
5431 | } | |
5432 | ||
26296c48 JG |
5433 | end: |
5434 | free(optstring); | |
5435 | return ret; | |
fac6795d DG |
5436 | } |
5437 | ||
5438 | /* | |
d063d709 | 5439 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
5440 | * apps_sock - The communication socket for all UST apps. |
5441 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 5442 | */ |
cf3af59e | 5443 | static int init_daemon_socket(void) |
fac6795d DG |
5444 | { |
5445 | int ret = 0; | |
5446 | mode_t old_umask; | |
5447 | ||
5448 | old_umask = umask(0); | |
5449 | ||
5450 | /* Create client tool unix socket */ | |
e6142f2e | 5451 | client_sock = lttcomm_create_unix_sock(config.client_unix_sock_path.value); |
d6f42150 | 5452 | if (client_sock < 0) { |
e6142f2e | 5453 | ERR("Create unix sock failed: %s", config.client_unix_sock_path.value); |
fac6795d DG |
5454 | ret = -1; |
5455 | goto end; | |
5456 | } | |
5457 | ||
b662582b DG |
5458 | /* Set the cloexec flag */ |
5459 | ret = utils_set_fd_cloexec(client_sock); | |
5460 | if (ret < 0) { | |
5461 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
5462 | "Continuing but note that the consumer daemon will have a " | |
5463 | "reference to this socket on exec()", client_sock); | |
5464 | } | |
5465 | ||
fac6795d | 5466 | /* File permission MUST be 660 */ |
e6142f2e | 5467 | ret = chmod(config.client_unix_sock_path.value, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
fac6795d | 5468 | if (ret < 0) { |
e6142f2e | 5469 | ERR("Set file permissions failed: %s", config.client_unix_sock_path.value); |
76d7553f | 5470 | PERROR("chmod"); |
fac6795d DG |
5471 | goto end; |
5472 | } | |
5473 | ||
5474 | /* Create the application unix socket */ | |
e6142f2e | 5475 | apps_sock = lttcomm_create_unix_sock(config.apps_unix_sock_path.value); |
d6f42150 | 5476 | if (apps_sock < 0) { |
e6142f2e | 5477 | ERR("Create unix sock failed: %s", config.apps_unix_sock_path.value); |
fac6795d DG |
5478 | ret = -1; |
5479 | goto end; | |
5480 | } | |
5481 | ||
b662582b DG |
5482 | /* Set the cloexec flag */ |
5483 | ret = utils_set_fd_cloexec(apps_sock); | |
5484 | if (ret < 0) { | |
5485 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
5486 | "Continuing but note that the consumer daemon will have a " | |
5487 | "reference to this socket on exec()", apps_sock); | |
5488 | } | |
5489 | ||
d6f42150 | 5490 | /* File permission MUST be 666 */ |
e6142f2e | 5491 | ret = chmod(config.apps_unix_sock_path.value, |
54d01ffb | 5492 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); |
fac6795d | 5493 | if (ret < 0) { |
e6142f2e | 5494 | ERR("Set file permissions failed: %s", config.apps_unix_sock_path.value); |
76d7553f | 5495 | PERROR("chmod"); |
fac6795d DG |
5496 | goto end; |
5497 | } | |
5498 | ||
b662582b DG |
5499 | DBG3("Session daemon client socket %d and application socket %d created", |
5500 | client_sock, apps_sock); | |
5501 | ||
fac6795d DG |
5502 | end: |
5503 | umask(old_umask); | |
5504 | return ret; | |
5505 | } | |
5506 | ||
f472090a JG |
5507 | /* |
5508 | * Create lockfile using the rundir and return its fd. | |
5509 | */ | |
5510 | static int create_lockfile(void) | |
5511 | { | |
5512 | return utils_create_lock_file(config.lock_file_path.value); | |
5513 | } | |
5514 | ||
fac6795d | 5515 | /* |
54d01ffb DG |
5516 | * Check if the global socket is available, and if a daemon is answering at the |
5517 | * other side. If yes, error is returned. | |
f472090a JG |
5518 | * |
5519 | * Also attempts to create and hold the lock file. | |
fac6795d | 5520 | */ |
cf3af59e | 5521 | static int check_existing_daemon(void) |
fac6795d | 5522 | { |
f472090a JG |
5523 | int ret = 0; |
5524 | ||
7d8234d9 | 5525 | /* Is there anybody out there ? */ |
099e26bd | 5526 | if (lttng_session_daemon_alive()) { |
f472090a JG |
5527 | ret = -EEXIST; |
5528 | goto end; | |
099e26bd | 5529 | } |
b09c7c76 | 5530 | |
f472090a JG |
5531 | lockfile_fd = create_lockfile(); |
5532 | if (lockfile_fd < 0) { | |
5533 | ret = -EEXIST; | |
5534 | goto end; | |
5535 | } | |
5536 | end: | |
5537 | return ret; | |
5538 | } | |
5539 | ||
5540 | static void sessiond_cleanup_lock_file(void) | |
5541 | { | |
5542 | int ret; | |
5543 | ||
5544 | /* | |
5545 | * Cleanup lock file by deleting it and finaly closing it which will | |
5546 | * release the file system lock. | |
5547 | */ | |
5548 | if (lockfile_fd >= 0) { | |
5549 | ret = remove(config.lock_file_path.value); | |
5550 | if (ret < 0) { | |
5551 | PERROR("remove lock file"); | |
5552 | } | |
5553 | ret = close(lockfile_fd); | |
5554 | if (ret < 0) { | |
5555 | PERROR("close lock file"); | |
5556 | } | |
5557 | } | |
fac6795d DG |
5558 | } |
5559 | ||
fac6795d | 5560 | /* |
d063d709 | 5561 | * Set the tracing group gid onto the client socket. |
5e16da05 | 5562 | * |
d063d709 | 5563 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 5564 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 5565 | */ |
be040666 | 5566 | static int set_permissions(char *rundir) |
fac6795d DG |
5567 | { |
5568 | int ret; | |
996b65c8 | 5569 | gid_t gid; |
fac6795d | 5570 | |
e6142f2e | 5571 | gid = utils_get_group_id(config.tracing_group_name.value); |
fac6795d | 5572 | |
d6f42150 | 5573 | /* Set lttng run dir */ |
be040666 | 5574 | ret = chown(rundir, 0, gid); |
d6f42150 | 5575 | if (ret < 0) { |
be040666 | 5576 | ERR("Unable to set group on %s", rundir); |
76d7553f | 5577 | PERROR("chown"); |
d6f42150 DG |
5578 | } |
5579 | ||
6c71277b MD |
5580 | /* |
5581 | * Ensure all applications and tracing group can search the run | |
5582 | * dir. Allow everyone to read the directory, since it does not | |
5583 | * buy us anything to hide its content. | |
5584 | */ | |
5585 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
5586 | if (ret < 0) { |
5587 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 5588 | PERROR("chmod"); |
d1613cf5 JN |
5589 | } |
5590 | ||
d6f42150 | 5591 | /* lttng client socket path */ |
e6142f2e | 5592 | ret = chown(config.client_unix_sock_path.value, 0, gid); |
fac6795d | 5593 | if (ret < 0) { |
e6142f2e | 5594 | ERR("Unable to set group on %s", config.client_unix_sock_path.value); |
76d7553f | 5595 | PERROR("chown"); |
d6f42150 DG |
5596 | } |
5597 | ||
3bd1e081 | 5598 | /* kconsumer error socket path */ |
6c71277b | 5599 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 5600 | if (ret < 0) { |
3bd1e081 | 5601 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 5602 | PERROR("chown"); |
3bd1e081 MD |
5603 | } |
5604 | ||
7753dea8 | 5605 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 5606 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
5607 | if (ret < 0) { |
5608 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 5609 | PERROR("chown"); |
7753dea8 MD |
5610 | } |
5611 | ||
5612 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 5613 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 5614 | if (ret < 0) { |
7753dea8 | 5615 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 5616 | PERROR("chown"); |
fac6795d DG |
5617 | } |
5618 | ||
d6f42150 | 5619 | DBG("All permissions are set"); |
e07ae692 | 5620 | |
fac6795d DG |
5621 | return ret; |
5622 | } | |
5623 | ||
d6f42150 | 5624 | /* |
d063d709 | 5625 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 5626 | */ |
e6142f2e | 5627 | static int create_lttng_rundir(void) |
d6f42150 DG |
5628 | { |
5629 | int ret; | |
5630 | ||
e6142f2e | 5631 | DBG3("Creating LTTng run directory: %s", config.rundir.value); |
67e40797 | 5632 | |
e6142f2e | 5633 | ret = mkdir(config.rundir.value, S_IRWXU); |
d6f42150 | 5634 | if (ret < 0) { |
b1f11e69 | 5635 | if (errno != EEXIST) { |
e6142f2e | 5636 | ERR("Unable to create %s", config.rundir.value); |
b1f11e69 DG |
5637 | goto error; |
5638 | } else { | |
5639 | ret = 0; | |
5640 | } | |
d6f42150 DG |
5641 | } |
5642 | ||
5643 | error: | |
5644 | return ret; | |
5645 | } | |
5646 | ||
5647 | /* | |
e6142f2e | 5648 | * Setup sockets and directory needed by the consumerds' communication with the |
d063d709 | 5649 | * session daemon. |
d6f42150 | 5650 | */ |
e6142f2e | 5651 | static int set_consumer_sockets(struct consumer_data *consumer_data) |
d6f42150 DG |
5652 | { |
5653 | int ret; | |
e6142f2e | 5654 | char *path = NULL; |
d6f42150 | 5655 | |
6c71277b | 5656 | switch (consumer_data->type) { |
7753dea8 | 5657 | case LTTNG_CONSUMER_KERNEL: |
e6142f2e | 5658 | path = config.kconsumerd_path.value; |
7753dea8 MD |
5659 | break; |
5660 | case LTTNG_CONSUMER64_UST: | |
e6142f2e | 5661 | path = config.consumerd64_path.value; |
7753dea8 MD |
5662 | break; |
5663 | case LTTNG_CONSUMER32_UST: | |
e6142f2e | 5664 | path = config.consumerd32_path.value; |
7753dea8 MD |
5665 | break; |
5666 | default: | |
5667 | ERR("Consumer type unknown"); | |
5668 | ret = -EINVAL; | |
5669 | goto error; | |
d6f42150 | 5670 | } |
e6142f2e | 5671 | assert(path); |
d6f42150 | 5672 | |
67e40797 DG |
5673 | DBG2("Creating consumer directory: %s", path); |
5674 | ||
6c71277b | 5675 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
e7e1ef17 JR |
5676 | if (ret < 0 && errno != EEXIST) { |
5677 | PERROR("mkdir"); | |
5678 | ERR("Failed to create %s", path); | |
5679 | goto error; | |
d6f42150 | 5680 | } |
6c71277b | 5681 | if (is_root) { |
e6142f2e | 5682 | ret = chown(path, 0, utils_get_group_id(config.tracing_group_name.value)); |
6c71277b MD |
5683 | if (ret < 0) { |
5684 | ERR("Unable to set group on %s", path); | |
5685 | PERROR("chown"); | |
5686 | goto error; | |
5687 | } | |
5688 | } | |
d6f42150 | 5689 | |
e6142f2e | 5690 | /* Create the consumerd error unix socket */ |
3bd1e081 MD |
5691 | consumer_data->err_sock = |
5692 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
5693 | if (consumer_data->err_sock < 0) { | |
5694 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
5695 | ret = -1; |
5696 | goto error; | |
5697 | } | |
5698 | ||
a24f05ab MD |
5699 | /* |
5700 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
5701 | * show must go on. | |
5702 | */ | |
5703 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
5704 | if (ret < 0) { | |
5705 | PERROR("utils_set_fd_cloexec"); | |
5706 | /* continue anyway */ | |
5707 | } | |
5708 | ||
d6f42150 | 5709 | /* File permission MUST be 660 */ |
3bd1e081 | 5710 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 5711 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 5712 | if (ret < 0) { |
3bd1e081 | 5713 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 5714 | PERROR("chmod"); |
d6f42150 DG |
5715 | goto error; |
5716 | } | |
5717 | ||
5718 | error: | |
5719 | return ret; | |
5720 | } | |
5721 | ||
fac6795d | 5722 | /* |
d063d709 | 5723 | * Signal handler for the daemon |
cf3af59e | 5724 | * |
54d01ffb DG |
5725 | * Simply stop all worker threads, leaving main() return gracefully after |
5726 | * joining all threads and calling cleanup(). | |
fac6795d DG |
5727 | */ |
5728 | static void sighandler(int sig) | |
5729 | { | |
5730 | switch (sig) { | |
cf3af59e | 5731 | case SIGINT: |
af87c45a | 5732 | DBG("SIGINT caught"); |
cf3af59e MD |
5733 | stop_threads(); |
5734 | break; | |
5735 | case SIGTERM: | |
af87c45a | 5736 | DBG("SIGTERM caught"); |
cf3af59e MD |
5737 | stop_threads(); |
5738 | break; | |
0bb7724a DG |
5739 | case SIGUSR1: |
5740 | CMM_STORE_SHARED(recv_child_signal, 1); | |
5741 | break; | |
cf3af59e MD |
5742 | default: |
5743 | break; | |
fac6795d | 5744 | } |
fac6795d DG |
5745 | } |
5746 | ||
5747 | /* | |
d063d709 | 5748 | * Setup signal handler for : |
1d4b027a | 5749 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 5750 | */ |
1d4b027a | 5751 | static int set_signal_handler(void) |
fac6795d | 5752 | { |
1d4b027a DG |
5753 | int ret = 0; |
5754 | struct sigaction sa; | |
5755 | sigset_t sigset; | |
fac6795d | 5756 | |
1d4b027a | 5757 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 5758 | PERROR("sigemptyset"); |
1d4b027a DG |
5759 | return ret; |
5760 | } | |
d6f42150 | 5761 | |
1d4b027a DG |
5762 | sa.sa_mask = sigset; |
5763 | sa.sa_flags = 0; | |
0072e5e2 MD |
5764 | |
5765 | sa.sa_handler = sighandler; | |
1d4b027a | 5766 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 5767 | PERROR("sigaction"); |
1d4b027a | 5768 | return ret; |
d6f42150 DG |
5769 | } |
5770 | ||
1d4b027a | 5771 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 5772 | PERROR("sigaction"); |
1d4b027a | 5773 | return ret; |
d6f42150 | 5774 | } |
aaf26714 | 5775 | |
0072e5e2 | 5776 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 5777 | PERROR("sigaction"); |
1d4b027a | 5778 | return ret; |
8c0faa1d DG |
5779 | } |
5780 | ||
0072e5e2 MD |
5781 | sa.sa_handler = SIG_IGN; |
5782 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
5783 | PERROR("sigaction"); |
5784 | return ret; | |
5785 | } | |
5786 | ||
5787 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
5788 | |
5789 | return ret; | |
fac6795d DG |
5790 | } |
5791 | ||
f3ed775e | 5792 | /* |
d063d709 | 5793 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 5794 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e DG |
5795 | */ |
5796 | static void set_ulimit(void) | |
5797 | { | |
5798 | int ret; | |
5799 | struct rlimit lim; | |
5800 | ||
514bb9f0 | 5801 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
5802 | lim.rlim_cur = 65535; |
5803 | lim.rlim_max = 65535; | |
5804 | ||
5805 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
5806 | if (ret < 0) { | |
76d7553f | 5807 | PERROR("failed to set open files limit"); |
f3ed775e DG |
5808 | } |
5809 | } | |
5810 | ||
4a15001e | 5811 | static int write_pidfile(void) |
35f90c40 | 5812 | { |
e6142f2e | 5813 | return utils_create_pid_file(getpid(), config.pid_file_path.value); |
35f90c40 DG |
5814 | } |
5815 | ||
e6142f2e JG |
5816 | static int set_clock_plugin_env(void) |
5817 | { | |
5818 | int ret = 0; | |
5819 | char *env_value = NULL; | |
cd9290dd | 5820 | |
e6142f2e JG |
5821 | if (!config.lttng_ust_clock_plugin.value) { |
5822 | goto end; | |
5823 | } | |
5824 | ||
5825 | ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s", | |
5826 | config.lttng_ust_clock_plugin.value); | |
cd9290dd | 5827 | if (ret < 0) { |
e6142f2e JG |
5828 | PERROR("asprintf"); |
5829 | goto end; | |
cd9290dd DG |
5830 | } |
5831 | ||
e6142f2e JG |
5832 | ret = putenv(env_value); |
5833 | if (ret) { | |
5834 | free(env_value); | |
5835 | PERROR("putenv of LTTNG_UST_CLOCK_PLUGIN"); | |
5836 | goto end; | |
5837 | } | |
cd9290dd | 5838 | |
e6142f2e JG |
5839 | DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"", |
5840 | config.lttng_ust_clock_plugin.value); | |
5841 | end: | |
4a15001e | 5842 | return ret; |
ef367a93 JG |
5843 | } |
5844 | ||
d086f507 JD |
5845 | static |
5846 | struct rotation_thread_timer_queue *create_rotate_timer_queue(void) | |
5847 | { | |
5848 | struct rotation_thread_timer_queue *queue = NULL; | |
5849 | ||
5850 | queue = zmalloc(sizeof(struct rotation_thread_timer_queue)); | |
5851 | if (!queue) { | |
5852 | PERROR("Failed to allocate timer rotate queue"); | |
5853 | goto end; | |
5854 | } | |
5855 | ||
5856 | queue->event_pipe = lttng_pipe_open(FD_CLOEXEC | O_NONBLOCK); | |
5857 | CDS_INIT_LIST_HEAD(&queue->list); | |
5858 | pthread_mutex_init(&queue->lock, NULL); | |
5859 | ||
5860 | end: | |
5861 | return queue; | |
5862 | } | |
5863 | ||
5864 | static | |
5865 | void destroy_rotate_timer_queue(struct rotation_thread_timer_queue *queue) | |
5866 | { | |
5867 | struct sessiond_rotation_timer *node, *tmp_node; | |
5868 | ||
5869 | if (!queue) { | |
5870 | return; | |
5871 | } | |
5872 | ||
5873 | lttng_pipe_destroy(queue->event_pipe); | |
5874 | ||
5875 | pthread_mutex_lock(&queue->lock); | |
5876 | /* Empty wait queue. */ | |
5877 | cds_list_for_each_entry_safe(node, tmp_node, &queue->list, head) { | |
5878 | cds_list_del(&node->head); | |
5879 | free(node); | |
5880 | } | |
5881 | pthread_mutex_unlock(&queue->lock); | |
5882 | ||
5883 | pthread_mutex_destroy(&queue->lock); | |
5884 | free(queue); | |
5885 | } | |
5886 | ||
fac6795d DG |
5887 | /* |
5888 | * main | |
5889 | */ | |
5890 | int main(int argc, char **argv) | |
5891 | { | |
4a15001e | 5892 | int ret = 0, retval = 0; |
fac6795d | 5893 | void *status; |
e6142f2e | 5894 | const char *env_app_timeout; |
b3530820 JG |
5895 | struct lttng_pipe *ust32_channel_monitor_pipe = NULL, |
5896 | *ust64_channel_monitor_pipe = NULL, | |
5897 | *kernel_channel_monitor_pipe = NULL; | |
99611076 JG |
5898 | bool notification_thread_launched = false; |
5899 | bool rotation_thread_launched = false; | |
5900 | bool timer_thread_launched = false; | |
62c43103 JD |
5901 | struct lttng_pipe *ust32_channel_rotate_pipe = NULL, |
5902 | *ust64_channel_rotate_pipe = NULL, | |
5903 | *kernel_channel_rotate_pipe = NULL; | |
d086f507 JD |
5904 | struct timer_thread_parameters timer_thread_ctx; |
5905 | /* Queue of rotation jobs populated by the sessiond-timer. */ | |
5906 | struct rotation_thread_timer_queue *rotation_timer_queue = NULL; | |
90936dcf | 5907 | sem_t notification_thread_ready; |
fac6795d | 5908 | |
335a95b7 MD |
5909 | init_kernel_workarounds(); |
5910 | ||
f6a9efaa DG |
5911 | rcu_register_thread(); |
5912 | ||
4a15001e MD |
5913 | if (set_signal_handler()) { |
5914 | retval = -1; | |
5915 | goto exit_set_signal_handler; | |
0bb7724a DG |
5916 | } |
5917 | ||
d086f507 JD |
5918 | if (sessiond_timer_signal_init()) { |
5919 | retval = -1; | |
5920 | goto exit_set_signal_handler; | |
5921 | } | |
5922 | ||
12744796 DG |
5923 | page_size = sysconf(_SC_PAGESIZE); |
5924 | if (page_size < 0) { | |
5925 | PERROR("sysconf _SC_PAGESIZE"); | |
5926 | page_size = LONG_MAX; | |
5927 | WARN("Fallback page size to %ld", page_size); | |
5928 | } | |
5929 | ||
e6142f2e JG |
5930 | ret = sessiond_config_init(&config); |
5931 | if (ret) { | |
5932 | retval = -1; | |
5933 | goto exit_set_signal_handler; | |
5934 | } | |
5935 | ||
2788b494 JR |
5936 | /* |
5937 | * Init config from environment variables. | |
5938 | * Command line option override env configuration per-doc. Do env first. | |
5939 | */ | |
5940 | sessiond_config_apply_env_config(&config); | |
5941 | ||
4a15001e MD |
5942 | /* |
5943 | * Parse arguments and load the daemon configuration file. | |
5944 | * | |
5945 | * We have an exit_options exit path to free memory reserved by | |
5946 | * set_options. This is needed because the rest of sessiond_cleanup() | |
5947 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
5948 | * depends on set_options. | |
5949 | */ | |
fac6795d | 5950 | progname = argv[0]; |
4a15001e MD |
5951 | if (set_options(argc, argv)) { |
5952 | retval = -1; | |
5953 | goto exit_options; | |
fac6795d DG |
5954 | } |
5955 | ||
e6142f2e JG |
5956 | /* |
5957 | * Resolve all paths received as arguments, configuration option, or | |
5958 | * through environment variable as absolute paths. This is necessary | |
5959 | * since daemonizing causes the sessiond's current working directory | |
5960 | * to '/'. | |
5961 | */ | |
5962 | ret = sessiond_config_resolve_paths(&config); | |
5963 | if (ret) { | |
5964 | goto exit_options; | |
5965 | } | |
5966 | ||
5967 | /* Apply config. */ | |
5968 | lttng_opt_verbose = config.verbose; | |
5969 | lttng_opt_quiet = config.quiet; | |
5970 | kconsumer_data.err_unix_sock_path = | |
5971 | config.kconsumerd_err_unix_sock_path.value; | |
5972 | kconsumer_data.cmd_unix_sock_path = | |
5973 | config.kconsumerd_cmd_unix_sock_path.value; | |
5974 | ustconsumer32_data.err_unix_sock_path = | |
5975 | config.consumerd32_err_unix_sock_path.value; | |
5976 | ustconsumer32_data.cmd_unix_sock_path = | |
5977 | config.consumerd32_cmd_unix_sock_path.value; | |
5978 | ustconsumer64_data.err_unix_sock_path = | |
5979 | config.consumerd64_err_unix_sock_path.value; | |
5980 | ustconsumer64_data.cmd_unix_sock_path = | |
5981 | config.consumerd64_cmd_unix_sock_path.value; | |
5982 | set_clock_plugin_env(); | |
5983 | ||
5984 | sessiond_config_log(&config); | |
5985 | ||
f472090a JG |
5986 | if (create_lttng_rundir()) { |
5987 | retval = -1; | |
5988 | goto exit_options; | |
5989 | } | |
5990 | ||
5991 | /* Abort launch if a session daemon is already running. */ | |
5992 | if (check_existing_daemon()) { | |
5993 | ERR("A session daemon is already running."); | |
5994 | retval = -1; | |
5995 | goto exit_options; | |
5996 | } | |
5997 | ||
fac6795d | 5998 | /* Daemonize */ |
e6142f2e | 5999 | if (config.daemonize || config.background) { |
ceed52b5 MD |
6000 | int i; |
6001 | ||
72dd7491 | 6002 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
e6142f2e | 6003 | !config.background); |
53094c05 | 6004 | if (ret < 0) { |
4a15001e MD |
6005 | retval = -1; |
6006 | goto exit_options; | |
53094c05 | 6007 | } |
0bb7724a | 6008 | |
ceed52b5 | 6009 | /* |
0bb7724a | 6010 | * We are in the child. Make sure all other file descriptors are |
4a15001e | 6011 | * closed, in case we are called with more opened file |
f472090a | 6012 | * descriptors than the standard ones and the lock file. |
ceed52b5 MD |
6013 | */ |
6014 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
f472090a JG |
6015 | if (i == lockfile_fd) { |
6016 | continue; | |
6017 | } | |
ceed52b5 MD |
6018 | (void) close(i); |
6019 | } | |
6020 | } | |
6021 | ||
7567352f MD |
6022 | if (run_as_create_worker(argv[0]) < 0) { |
6023 | goto exit_create_run_as_worker_cleanup; | |
6024 | } | |
6025 | ||
4a15001e MD |
6026 | /* |
6027 | * Starting from here, we can create threads. This needs to be after | |
6028 | * lttng_daemonize due to RCU. | |
6029 | */ | |
6030 | ||
6031 | /* | |
6032 | * Initialize the health check subsystem. This call should set the | |
6033 | * appropriate time values. | |
6034 | */ | |
6035 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
6036 | if (!health_sessiond) { | |
6037 | PERROR("health_app_create error"); | |
6038 | retval = -1; | |
6039 | goto exit_health_sessiond_cleanup; | |
6040 | } | |
6041 | ||
4a15001e | 6042 | /* Create thread to clean up RCU hash tables */ |
5e97de00 | 6043 | if (init_ht_cleanup_thread(&ht_cleanup_thread)) { |
4a15001e MD |
6044 | retval = -1; |
6045 | goto exit_ht_cleanup; | |
6046 | } | |
6047 | ||
ceed52b5 | 6048 | /* Create thread quit pipe */ |
4a15001e MD |
6049 | if (init_thread_quit_pipe()) { |
6050 | retval = -1; | |
6051 | goto exit_init_data; | |
fac6795d DG |
6052 | } |
6053 | ||
6054 | /* Check if daemon is UID = 0 */ | |
6055 | is_root = !getuid(); | |
fac6795d | 6056 | if (is_root) { |
67e40797 | 6057 | /* Create global run dir with root access */ |
67e40797 | 6058 | |
b3530820 JG |
6059 | kernel_channel_monitor_pipe = lttng_pipe_open(0); |
6060 | if (!kernel_channel_monitor_pipe) { | |
6061 | ERR("Failed to create kernel consumer channel monitor pipe"); | |
6062 | retval = -1; | |
6063 | goto exit_init_data; | |
6064 | } | |
6065 | kconsumer_data.channel_monitor_pipe = | |
6066 | lttng_pipe_release_writefd( | |
6067 | kernel_channel_monitor_pipe); | |
6068 | if (kconsumer_data.channel_monitor_pipe < 0) { | |
6069 | retval = -1; | |
6070 | goto exit_init_data; | |
6071 | } | |
62c43103 JD |
6072 | kernel_channel_rotate_pipe = lttng_pipe_open(0); |
6073 | if (!kernel_channel_rotate_pipe) { | |
6074 | ERR("Failed to create kernel consumer channel rotate pipe"); | |
6075 | retval = -1; | |
6076 | goto exit_init_data; | |
6077 | } | |
6078 | kconsumer_data.channel_rotate_pipe = | |
6079 | lttng_pipe_release_writefd( | |
6080 | kernel_channel_rotate_pipe); | |
6081 | if (kconsumer_data.channel_rotate_pipe < 0) { | |
6082 | retval = -1; | |
6083 | goto exit_init_data; | |
6084 | } | |
fac6795d DG |
6085 | } |
6086 | ||
5c827ce0 DG |
6087 | /* Set consumer initial state */ |
6088 | kernel_consumerd_state = CONSUMER_STOPPED; | |
6089 | ust_consumerd_state = CONSUMER_STOPPED; | |
6090 | ||
b3530820 JG |
6091 | ust32_channel_monitor_pipe = lttng_pipe_open(0); |
6092 | if (!ust32_channel_monitor_pipe) { | |
6093 | ERR("Failed to create 32-bit user space consumer channel monitor pipe"); | |
6094 | retval = -1; | |
6095 | goto exit_init_data; | |
6096 | } | |
6097 | ustconsumer32_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
6098 | ust32_channel_monitor_pipe); | |
6099 | if (ustconsumer32_data.channel_monitor_pipe < 0) { | |
6100 | retval = -1; | |
6101 | goto exit_init_data; | |
6102 | } | |
62c43103 JD |
6103 | ust32_channel_rotate_pipe = lttng_pipe_open(0); |
6104 | if (!ust32_channel_rotate_pipe) { | |
6105 | ERR("Failed to create 32-bit user space consumer channel rotate pipe"); | |
6106 | retval = -1; | |
6107 | goto exit_init_data; | |
6108 | } | |
6109 | ustconsumer32_data.channel_rotate_pipe = lttng_pipe_release_writefd( | |
6110 | ust32_channel_rotate_pipe); | |
6111 | if (ustconsumer32_data.channel_rotate_pipe < 0) { | |
6112 | retval = -1; | |
6113 | goto exit_init_data; | |
6114 | } | |
6115 | ||
d086f507 JD |
6116 | /* |
6117 | * The rotation_timer_queue structure is shared between the sessiond timer | |
6118 | * thread and the rotation thread. The main() keeps the ownership and | |
6119 | * destroys it when both threads have quit. | |
6120 | */ | |
6121 | rotation_timer_queue = create_rotate_timer_queue(); | |
6122 | if (!rotation_timer_queue) { | |
6123 | retval = -1; | |
6124 | goto exit_init_data; | |
6125 | } | |
6126 | timer_thread_ctx.rotation_timer_queue = rotation_timer_queue; | |
67e40797 | 6127 | |
b3530820 JG |
6128 | ust64_channel_monitor_pipe = lttng_pipe_open(0); |
6129 | if (!ust64_channel_monitor_pipe) { | |
6130 | ERR("Failed to create 64-bit user space consumer channel monitor pipe"); | |
6131 | retval = -1; | |
6132 | goto exit_init_data; | |
6133 | } | |
6134 | ustconsumer64_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
6135 | ust64_channel_monitor_pipe); | |
6136 | if (ustconsumer64_data.channel_monitor_pipe < 0) { | |
6137 | retval = -1; | |
6138 | goto exit_init_data; | |
6139 | } | |
62c43103 JD |
6140 | ust64_channel_rotate_pipe = lttng_pipe_open(0); |
6141 | if (!ust64_channel_rotate_pipe) { | |
6142 | ERR("Failed to create 64-bit user space consumer channel rotate pipe"); | |
6143 | retval = -1; | |
6144 | goto exit_init_data; | |
6145 | } | |
6146 | ustconsumer64_data.channel_rotate_pipe = lttng_pipe_release_writefd( | |
6147 | ust64_channel_rotate_pipe); | |
6148 | if (ustconsumer64_data.channel_rotate_pipe < 0) { | |
6149 | retval = -1; | |
6150 | goto exit_init_data; | |
6151 | } | |
847177cd | 6152 | |
1427f9b2 DG |
6153 | /* |
6154 | * Init UST app hash table. Alloc hash table before this point since | |
6155 | * cleanup() can get called after that point. | |
6156 | */ | |
4a15001e | 6157 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 6158 | ERR("Failed to allocate UST app hash table"); |
4a15001e MD |
6159 | retval = -1; |
6160 | goto exit_init_data; | |
6161 | } | |
1427f9b2 | 6162 | |
6a4e4039 JG |
6163 | /* |
6164 | * Initialize agent app hash table. We allocate the hash table here | |
6165 | * since cleanup() can get called after this point. | |
6166 | */ | |
6167 | if (agent_app_ht_alloc()) { | |
6168 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e MD |
6169 | retval = -1; |
6170 | goto exit_init_data; | |
f20baf8e DG |
6171 | } |
6172 | ||
a88df331 DG |
6173 | /* |
6174 | * These actions must be executed as root. We do that *after* setting up | |
6175 | * the sockets path because we MUST make the check for another daemon using | |
6176 | * those paths *before* trying to set the kernel consumer sockets and init | |
6177 | * kernel tracer. | |
6178 | */ | |
6179 | if (is_root) { | |
e6142f2e | 6180 | if (set_consumer_sockets(&kconsumer_data)) { |
4a15001e MD |
6181 | retval = -1; |
6182 | goto exit_init_data; | |
7753dea8 MD |
6183 | } |
6184 | ||
a88df331 | 6185 | /* Setup kernel tracer */ |
e6142f2e | 6186 | if (!config.no_kernel) { |
4fba7219 | 6187 | init_kernel_tracer(); |
89588270 DG |
6188 | if (kernel_tracer_fd >= 0) { |
6189 | ret = syscall_init_table(); | |
6190 | if (ret < 0) { | |
4a15001e MD |
6191 | ERR("Unable to populate syscall table. " |
6192 | "Syscall tracing won't work " | |
6193 | "for this session daemon."); | |
89588270 | 6194 | } |
834978fd | 6195 | } |
4fba7219 | 6196 | } |
a88df331 DG |
6197 | |
6198 | /* Set ulimit for open files */ | |
6199 | set_ulimit(); | |
fac6795d | 6200 | } |
4063050c MD |
6201 | /* init lttng_fd tracking must be done after set_ulimit. */ |
6202 | lttng_fd_init(); | |
fac6795d | 6203 | |
e6142f2e | 6204 | if (set_consumer_sockets(&ustconsumer64_data)) { |
4a15001e MD |
6205 | retval = -1; |
6206 | goto exit_init_data; | |
67e40797 DG |
6207 | } |
6208 | ||
e6142f2e | 6209 | if (set_consumer_sockets(&ustconsumer32_data)) { |
4a15001e MD |
6210 | retval = -1; |
6211 | goto exit_init_data; | |
67e40797 DG |
6212 | } |
6213 | ||
d6f42150 | 6214 | /* Setup the needed unix socket */ |
4a15001e MD |
6215 | if (init_daemon_socket()) { |
6216 | retval = -1; | |
6217 | goto exit_init_data; | |
fac6795d DG |
6218 | } |
6219 | ||
6220 | /* Set credentials to socket */ | |
e6142f2e | 6221 | if (is_root && set_permissions(config.rundir.value)) { |
4a15001e MD |
6222 | retval = -1; |
6223 | goto exit_init_data; | |
fac6795d DG |
6224 | } |
6225 | ||
5b8719f5 | 6226 | /* Get parent pid if -S, --sig-parent is specified. */ |
e6142f2e | 6227 | if (config.sig_parent) { |
5b8719f5 DG |
6228 | ppid = getppid(); |
6229 | } | |
6230 | ||
7a485870 | 6231 | /* Setup the kernel pipe for waking up the kernel thread */ |
e6142f2e | 6232 | if (is_root && !config.no_kernel) { |
4a15001e MD |
6233 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
6234 | retval = -1; | |
6235 | goto exit_init_data; | |
6620da75 | 6236 | } |
7a485870 DG |
6237 | } |
6238 | ||
099e26bd | 6239 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
6240 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
6241 | retval = -1; | |
6242 | goto exit_init_data; | |
099e26bd DG |
6243 | } |
6244 | ||
d0b96690 | 6245 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
6246 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
6247 | retval = -1; | |
6248 | goto exit_init_data; | |
d0b96690 DG |
6249 | } |
6250 | ||
7972aab2 DG |
6251 | /* Initialize global buffer per UID and PID registry. */ |
6252 | buffer_reg_init_uid_registry(); | |
6253 | buffer_reg_init_pid_registry(); | |
6254 | ||
099e26bd | 6255 | /* Init UST command queue. */ |
8bdee6e2 | 6256 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 6257 | |
273ea72c | 6258 | /* |
4a15001e MD |
6259 | * Get session list pointer. This pointer MUST NOT be free'd. This list |
6260 | * is statically declared in session.c | |
273ea72c | 6261 | */ |
54d01ffb | 6262 | session_list_ptr = session_get_list(); |
b5541356 | 6263 | |
2f77fc4b | 6264 | cmd_init(); |
00e2e675 | 6265 | |
ae9e45b3 DG |
6266 | /* Check for the application socket timeout env variable. */ |
6267 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
6268 | if (env_app_timeout) { | |
e6142f2e | 6269 | config.app_socket_timeout = atoi(env_app_timeout); |
ae9e45b3 | 6270 | } else { |
e6142f2e | 6271 | config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; |
ae9e45b3 DG |
6272 | } |
6273 | ||
4a15001e MD |
6274 | ret = write_pidfile(); |
6275 | if (ret) { | |
6276 | ERR("Error in write_pidfile"); | |
6277 | retval = -1; | |
6278 | goto exit_init_data; | |
6279 | } | |
35f90c40 | 6280 | |
554831e7 MD |
6281 | /* Initialize communication library */ |
6282 | lttcomm_init(); | |
4a15001e | 6283 | /* Initialize TCP timeout values */ |
d831c249 | 6284 | lttcomm_inet_init(); |
554831e7 | 6285 | |
ef367a93 | 6286 | if (load_session_init_data(&load_info) < 0) { |
4a15001e MD |
6287 | retval = -1; |
6288 | goto exit_init_data; | |
ef367a93 | 6289 | } |
e6142f2e | 6290 | load_info->path = config.load_session_path.value; |
ef367a93 | 6291 | |
12b4fb37 | 6292 | /* Create health-check thread. */ |
1a1a34b4 | 6293 | ret = pthread_create(&health_thread, default_pthread_attr(), |
44a5e5eb | 6294 | thread_manage_health, (void *) NULL); |
4a15001e MD |
6295 | if (ret) { |
6296 | errno = ret; | |
44a5e5eb | 6297 | PERROR("pthread_create health"); |
4a15001e | 6298 | retval = -1; |
44a5e5eb DG |
6299 | goto exit_health; |
6300 | } | |
6301 | ||
90936dcf JD |
6302 | /* |
6303 | * The rotation thread needs the notification thread to be ready before | |
6304 | * creating the rotate_notification_channel, so we use this semaphore as | |
6305 | * a rendez-vous point. | |
6306 | */ | |
6307 | sem_init(¬ification_thread_ready, 0, 0); | |
6308 | ||
b3530820 JG |
6309 | /* notification_thread_data acquires the pipes' read side. */ |
6310 | notification_thread_handle = notification_thread_handle_create( | |
6311 | ust32_channel_monitor_pipe, | |
6312 | ust64_channel_monitor_pipe, | |
90936dcf JD |
6313 | kernel_channel_monitor_pipe, |
6314 | ¬ification_thread_ready); | |
b3530820 JG |
6315 | if (!notification_thread_handle) { |
6316 | retval = -1; | |
6317 | ERR("Failed to create notification thread shared data"); | |
6318 | stop_threads(); | |
6319 | goto exit_notification; | |
6320 | } | |
6321 | ||
6322 | /* Create notification thread. */ | |
6323 | ret = pthread_create(¬ification_thread, default_pthread_attr(), | |
6324 | thread_notification, notification_thread_handle); | |
6325 | if (ret) { | |
6326 | errno = ret; | |
6327 | PERROR("pthread_create notification"); | |
6328 | retval = -1; | |
6329 | stop_threads(); | |
6330 | goto exit_notification; | |
6331 | } | |
99611076 | 6332 | notification_thread_launched = true; |
b3530820 | 6333 | |
d086f507 JD |
6334 | /* Create timer thread. */ |
6335 | ret = pthread_create(&timer_thread, default_pthread_attr(), | |
6336 | sessiond_timer_thread, &timer_thread_ctx); | |
6337 | if (ret) { | |
6338 | errno = ret; | |
6339 | PERROR("pthread_create timer"); | |
6340 | retval = -1; | |
6341 | stop_threads(); | |
6342 | goto exit_notification; | |
6343 | } | |
99611076 | 6344 | timer_thread_launched = true; |
d086f507 | 6345 | |
db66e574 JD |
6346 | /* rotation_thread_data acquires the pipes' read side. */ |
6347 | rotation_thread_handle = rotation_thread_handle_create( | |
6348 | ust32_channel_rotate_pipe, | |
6349 | ust64_channel_rotate_pipe, | |
6350 | kernel_channel_rotate_pipe, | |
d086f507 | 6351 | thread_quit_pipe[0], |
90936dcf JD |
6352 | rotation_timer_queue, |
6353 | notification_thread_handle, | |
6354 | ¬ification_thread_ready); | |
db66e574 JD |
6355 | if (!rotation_thread_handle) { |
6356 | retval = -1; | |
6357 | ERR("Failed to create rotation thread shared data"); | |
6358 | stop_threads(); | |
6359 | goto exit_rotation; | |
6360 | } | |
db66e574 JD |
6361 | |
6362 | /* Create rotation thread. */ | |
6363 | ret = pthread_create(&rotation_thread, default_pthread_attr(), | |
6364 | thread_rotation, rotation_thread_handle); | |
6365 | if (ret) { | |
6366 | errno = ret; | |
6367 | PERROR("pthread_create rotation"); | |
6368 | retval = -1; | |
6369 | stop_threads(); | |
6370 | goto exit_rotation; | |
6371 | } | |
99611076 | 6372 | rotation_thread_launched = true; |
db66e574 | 6373 | |
cf3af59e | 6374 | /* Create thread to manage the client socket */ |
1a1a34b4 | 6375 | ret = pthread_create(&client_thread, default_pthread_attr(), |
099e26bd | 6376 | thread_manage_clients, (void *) NULL); |
4a15001e MD |
6377 | if (ret) { |
6378 | errno = ret; | |
76d7553f | 6379 | PERROR("pthread_create clients"); |
4a15001e | 6380 | retval = -1; |
b3530820 | 6381 | stop_threads(); |
cf3af59e MD |
6382 | goto exit_client; |
6383 | } | |
fac6795d | 6384 | |
099e26bd | 6385 | /* Create thread to dispatch registration */ |
1a1a34b4 | 6386 | ret = pthread_create(&dispatch_thread, default_pthread_attr(), |
099e26bd | 6387 | thread_dispatch_ust_registration, (void *) NULL); |
4a15001e MD |
6388 | if (ret) { |
6389 | errno = ret; | |
76d7553f | 6390 | PERROR("pthread_create dispatch"); |
4a15001e | 6391 | retval = -1; |
b3530820 | 6392 | stop_threads(); |
099e26bd DG |
6393 | goto exit_dispatch; |
6394 | } | |
6395 | ||
6396 | /* Create thread to manage application registration. */ | |
1a1a34b4 | 6397 | ret = pthread_create(®_apps_thread, default_pthread_attr(), |
099e26bd | 6398 | thread_registration_apps, (void *) NULL); |
4a15001e MD |
6399 | if (ret) { |
6400 | errno = ret; | |
76d7553f | 6401 | PERROR("pthread_create registration"); |
4a15001e | 6402 | retval = -1; |
b3530820 | 6403 | stop_threads(); |
099e26bd DG |
6404 | goto exit_reg_apps; |
6405 | } | |
6406 | ||
cf3af59e | 6407 | /* Create thread to manage application socket */ |
1a1a34b4 | 6408 | ret = pthread_create(&apps_thread, default_pthread_attr(), |
54d01ffb | 6409 | thread_manage_apps, (void *) NULL); |
4a15001e MD |
6410 | if (ret) { |
6411 | errno = ret; | |
d0b96690 | 6412 | PERROR("pthread_create apps"); |
4a15001e | 6413 | retval = -1; |
b3530820 | 6414 | stop_threads(); |
d0b96690 DG |
6415 | goto exit_apps; |
6416 | } | |
6417 | ||
6418 | /* Create thread to manage application notify socket */ | |
1a1a34b4 | 6419 | ret = pthread_create(&apps_notify_thread, default_pthread_attr(), |
d0b96690 | 6420 | ust_thread_manage_notify, (void *) NULL); |
4a15001e MD |
6421 | if (ret) { |
6422 | errno = ret; | |
f5c32ef1 | 6423 | PERROR("pthread_create notify"); |
4a15001e | 6424 | retval = -1; |
b3530820 | 6425 | stop_threads(); |
9563b0ad | 6426 | goto exit_apps_notify; |
cf3af59e | 6427 | } |
fac6795d | 6428 | |
022d91ba | 6429 | /* Create agent registration thread. */ |
1a1a34b4 | 6430 | ret = pthread_create(&agent_reg_thread, default_pthread_attr(), |
022d91ba | 6431 | agent_thread_manage_registration, (void *) NULL); |
4a15001e MD |
6432 | if (ret) { |
6433 | errno = ret; | |
022d91ba | 6434 | PERROR("pthread_create agent"); |
4a15001e | 6435 | retval = -1; |
b3530820 | 6436 | stop_threads(); |
022d91ba | 6437 | goto exit_agent_reg; |
4d076222 DG |
6438 | } |
6439 | ||
6620da75 | 6440 | /* Don't start this thread if kernel tracing is not requested nor root */ |
e6142f2e | 6441 | if (is_root && !config.no_kernel) { |
6620da75 | 6442 | /* Create kernel thread to manage kernel event */ |
1a1a34b4 | 6443 | ret = pthread_create(&kernel_thread, default_pthread_attr(), |
6620da75 | 6444 | thread_manage_kernel, (void *) NULL); |
4a15001e MD |
6445 | if (ret) { |
6446 | errno = ret; | |
6620da75 | 6447 | PERROR("pthread_create kernel"); |
4a15001e | 6448 | retval = -1; |
b3530820 | 6449 | stop_threads(); |
6620da75 DG |
6450 | goto exit_kernel; |
6451 | } | |
ef367a93 | 6452 | } |
7a485870 | 6453 | |
4a15001e | 6454 | /* Create session loading thread. */ |
1a1a34b4 MJ |
6455 | ret = pthread_create(&load_session_thread, default_pthread_attr(), |
6456 | thread_load_session, load_info); | |
4a15001e MD |
6457 | if (ret) { |
6458 | errno = ret; | |
6459 | PERROR("pthread_create load_session_thread"); | |
6460 | retval = -1; | |
b3530820 | 6461 | stop_threads(); |
4a15001e MD |
6462 | goto exit_load_session; |
6463 | } | |
6464 | ||
6465 | /* | |
6466 | * This is where we start awaiting program completion (e.g. through | |
6467 | * signal that asks threads to teardown). | |
6468 | */ | |
6469 | ||
6470 | ret = pthread_join(load_session_thread, &status); | |
6471 | if (ret) { | |
6472 | errno = ret; | |
6473 | PERROR("pthread_join load_session_thread"); | |
6474 | retval = -1; | |
6475 | } | |
6476 | exit_load_session: | |
ef367a93 | 6477 | |
e6142f2e | 6478 | if (is_root && !config.no_kernel) { |
6620da75 | 6479 | ret = pthread_join(kernel_thread, &status); |
4a15001e MD |
6480 | if (ret) { |
6481 | errno = ret; | |
6620da75 | 6482 | PERROR("pthread_join"); |
4a15001e | 6483 | retval = -1; |
6620da75 | 6484 | } |
fac6795d | 6485 | } |
cf3af59e | 6486 | exit_kernel: |
4a15001e | 6487 | |
022d91ba | 6488 | ret = pthread_join(agent_reg_thread, &status); |
4a15001e MD |
6489 | if (ret) { |
6490 | errno = ret; | |
022d91ba | 6491 | PERROR("pthread_join agent"); |
4a15001e | 6492 | retval = -1; |
4d076222 | 6493 | } |
022d91ba | 6494 | exit_agent_reg: |
4a15001e | 6495 | |
9563b0ad | 6496 | ret = pthread_join(apps_notify_thread, &status); |
4a15001e MD |
6497 | if (ret) { |
6498 | errno = ret; | |
9563b0ad | 6499 | PERROR("pthread_join apps notify"); |
4a15001e | 6500 | retval = -1; |
9563b0ad | 6501 | } |
9563b0ad | 6502 | exit_apps_notify: |
4a15001e | 6503 | |
cf3af59e | 6504 | ret = pthread_join(apps_thread, &status); |
4a15001e MD |
6505 | if (ret) { |
6506 | errno = ret; | |
9563b0ad | 6507 | PERROR("pthread_join apps"); |
4a15001e | 6508 | retval = -1; |
cf3af59e | 6509 | } |
cf3af59e | 6510 | exit_apps: |
4a15001e | 6511 | |
099e26bd | 6512 | ret = pthread_join(reg_apps_thread, &status); |
4a15001e MD |
6513 | if (ret) { |
6514 | errno = ret; | |
76d7553f | 6515 | PERROR("pthread_join"); |
4a15001e | 6516 | retval = -1; |
099e26bd | 6517 | } |
099e26bd | 6518 | exit_reg_apps: |
4a15001e | 6519 | |
772b8f4d MD |
6520 | /* |
6521 | * Join dispatch thread after joining reg_apps_thread to ensure | |
6522 | * we don't leak applications in the queue. | |
6523 | */ | |
099e26bd | 6524 | ret = pthread_join(dispatch_thread, &status); |
4a15001e MD |
6525 | if (ret) { |
6526 | errno = ret; | |
76d7553f | 6527 | PERROR("pthread_join"); |
4a15001e | 6528 | retval = -1; |
099e26bd | 6529 | } |
099e26bd | 6530 | exit_dispatch: |
4a15001e | 6531 | |
cf3af59e | 6532 | ret = pthread_join(client_thread, &status); |
4a15001e MD |
6533 | if (ret) { |
6534 | errno = ret; | |
76d7553f | 6535 | PERROR("pthread_join"); |
4a15001e | 6536 | retval = -1; |
cf3af59e | 6537 | } |
a88df331 | 6538 | |
b3530820 | 6539 | exit_client: |
db66e574 | 6540 | exit_rotation: |
b3530820 | 6541 | exit_notification: |
90936dcf | 6542 | sem_destroy(¬ification_thread_ready); |
4a15001e MD |
6543 | ret = pthread_join(health_thread, &status); |
6544 | if (ret) { | |
6545 | errno = ret; | |
6546 | PERROR("pthread_join health thread"); | |
6547 | retval = -1; | |
06f525de DG |
6548 | } |
6549 | ||
b3530820 | 6550 | exit_health: |
4a15001e | 6551 | exit_init_data: |
4d62fbf8 MD |
6552 | /* |
6553 | * Wait for all pending call_rcu work to complete before tearing | |
6554 | * down data structures. call_rcu worker may be trying to | |
6555 | * perform lookups in those structures. | |
6556 | */ | |
6557 | rcu_barrier(); | |
4a15001e MD |
6558 | /* |
6559 | * sessiond_cleanup() is called when no other thread is running, except | |
6560 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
6561 | */ | |
6562 | rcu_thread_online(); | |
6563 | sessiond_cleanup(); | |
06f525de | 6564 | |
c4d5de9d JG |
6565 | /* |
6566 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
6567 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
6568 | * the queue is empty before shutting down the clean-up thread. | |
6569 | */ | |
6570 | rcu_barrier(); | |
6571 | ||
b3530820 JG |
6572 | /* |
6573 | * The teardown of the notification system is performed after the | |
6574 | * session daemon's teardown in order to allow it to be notified | |
6575 | * of the active session and channels at the moment of the teardown. | |
6576 | */ | |
6577 | if (notification_thread_handle) { | |
99611076 | 6578 | if (notification_thread_launched) { |
6be1a386 JG |
6579 | notification_thread_command_quit( |
6580 | notification_thread_handle); | |
6581 | ret = pthread_join(notification_thread, &status); | |
6582 | if (ret) { | |
6583 | errno = ret; | |
6584 | PERROR("pthread_join notification thread"); | |
6585 | retval = -1; | |
6586 | } | |
3dec304b | 6587 | } |
6be1a386 | 6588 | notification_thread_handle_destroy(notification_thread_handle); |
b3530820 JG |
6589 | } |
6590 | ||
db66e574 | 6591 | if (rotation_thread_handle) { |
99611076 | 6592 | if (rotation_thread_launched) { |
db66e574 JD |
6593 | ret = pthread_join(rotation_thread, &status); |
6594 | if (ret) { | |
6595 | errno = ret; | |
6596 | PERROR("pthread_join rotation thread"); | |
6597 | retval = -1; | |
6598 | } | |
6599 | } | |
6600 | rotation_thread_handle_destroy(rotation_thread_handle); | |
6601 | } | |
6602 | ||
99611076 | 6603 | if (timer_thread_launched) { |
d086f507 JD |
6604 | kill(getpid(), LTTNG_SESSIOND_SIG_EXIT); |
6605 | ret = pthread_join(timer_thread, &status); | |
6606 | if (ret) { | |
6607 | errno = ret; | |
6608 | PERROR("pthread_join timer thread"); | |
6609 | retval = -1; | |
6610 | } | |
6611 | } | |
6612 | ||
6613 | /* | |
6614 | * After the rotation and timer thread have quit, we can safely destroy | |
6615 | * the rotation_timer_queue. | |
6616 | */ | |
6617 | destroy_rotate_timer_queue(rotation_timer_queue); | |
6618 | ||
b3530820 JG |
6619 | rcu_thread_offline(); |
6620 | rcu_unregister_thread(); | |
6621 | ||
5e97de00 | 6622 | ret = fini_ht_cleanup_thread(&ht_cleanup_thread); |
4a15001e | 6623 | if (ret) { |
4a15001e | 6624 | retval = -1; |
0b2dc8df | 6625 | } |
b3530820 JG |
6626 | lttng_pipe_destroy(ust32_channel_monitor_pipe); |
6627 | lttng_pipe_destroy(ust64_channel_monitor_pipe); | |
6628 | lttng_pipe_destroy(kernel_channel_monitor_pipe); | |
62c43103 JD |
6629 | lttng_pipe_destroy(ust32_channel_rotate_pipe); |
6630 | lttng_pipe_destroy(ust64_channel_rotate_pipe); | |
6631 | lttng_pipe_destroy(kernel_channel_rotate_pipe); | |
0b2dc8df | 6632 | exit_ht_cleanup: |
4a15001e | 6633 | |
4a15001e MD |
6634 | health_app_destroy(health_sessiond); |
6635 | exit_health_sessiond_cleanup: | |
7567352f | 6636 | exit_create_run_as_worker_cleanup: |
4a15001e MD |
6637 | |
6638 | exit_options: | |
f472090a | 6639 | sessiond_cleanup_lock_file(); |
4a15001e MD |
6640 | sessiond_cleanup_options(); |
6641 | ||
6642 | exit_set_signal_handler: | |
6643 | if (!retval) { | |
cf3af59e | 6644 | exit(EXIT_SUCCESS); |
4a15001e MD |
6645 | } else { |
6646 | exit(EXIT_FAILURE); | |
67e40797 | 6647 | } |
fac6795d | 6648 | } |