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 | ||
20 | #define _GNU_SOURCE | |
6c1c0768 | 21 | #define _LGPL_SOURCE |
fac6795d DG |
22 | #include <getopt.h> |
23 | #include <grp.h> | |
24 | #include <limits.h> | |
0bb7724a | 25 | #include <paths.h> |
fac6795d DG |
26 | #include <pthread.h> |
27 | #include <signal.h> | |
28 | #include <stdio.h> | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
331744e3 | 31 | #include <inttypes.h> |
0fdd1e2c | 32 | #include <sys/mman.h> |
b73401da | 33 | #include <sys/mount.h> |
1e307fab | 34 | #include <sys/resource.h> |
fac6795d DG |
35 | #include <sys/socket.h> |
36 | #include <sys/stat.h> | |
37 | #include <sys/types.h> | |
0fdd1e2c | 38 | #include <sys/wait.h> |
5c827ce0 | 39 | #include <urcu/uatomic.h> |
fac6795d | 40 | #include <unistd.h> |
3bd1e081 | 41 | #include <config.h> |
fac6795d | 42 | |
990570ed | 43 | #include <common/common.h> |
d27c42b8 | 44 | #include <common/compat/socket.h> |
e8fa9fb0 | 45 | #include <common/compat/getenv.h> |
db758600 DG |
46 | #include <common/defaults.h> |
47 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 48 | #include <common/futex.h> |
00e2e675 | 49 | #include <common/relayd/relayd.h> |
81b86775 | 50 | #include <common/utils.h> |
3ccdf997 | 51 | #include <common/daemonize.h> |
26296c48 | 52 | #include <common/config/config.h> |
fac6795d | 53 | |
10a8a223 | 54 | #include "lttng-sessiond.h" |
7972aab2 | 55 | #include "buffer-registry.h" |
54d01ffb | 56 | #include "channel.h" |
2f77fc4b | 57 | #include "cmd.h" |
00e2e675 | 58 | #include "consumer.h" |
099e26bd | 59 | #include "context.h" |
54d01ffb | 60 | #include "event.h" |
4771f025 | 61 | #include "kernel.h" |
f1e16794 | 62 | #include "kernel-consumer.h" |
096102bd | 63 | #include "modprobe.h" |
0fdd1e2c | 64 | #include "shm.h" |
1e307fab | 65 | #include "ust-ctl.h" |
00e2e675 | 66 | #include "ust-consumer.h" |
8e68d1c8 | 67 | #include "utils.h" |
4063050c | 68 | #include "fd-limit.h" |
8782cc74 | 69 | #include "health-sessiond.h" |
8ac94142 | 70 | #include "testpoint.h" |
d0b96690 | 71 | #include "ust-thread.h" |
022d91ba | 72 | #include "agent-thread.h" |
fb198a11 | 73 | #include "save.h" |
ef367a93 | 74 | #include "load-session-thread.h" |
834978fd | 75 | #include "syscall.h" |
7c1d2758 | 76 | #include "agent.h" |
fac6795d | 77 | |
ebaeda94 MD |
78 | #define CONSUMERD_FILE "lttng-consumerd" |
79 | ||
fac6795d | 80 | const char *progname; |
6c71277b | 81 | static const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
26296c48 JG |
82 | static int tracing_group_name_override; |
83 | static char *opt_pidfile; | |
5b8719f5 | 84 | static int opt_sig_parent; |
97e19046 | 85 | static int opt_verbose_consumer; |
72dd7491 | 86 | static int opt_daemon, opt_background; |
4fba7219 | 87 | static int opt_no_kernel; |
ef367a93 | 88 | static char *opt_load_session_path; |
1d4b027a | 89 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
0bb7724a | 90 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ |
67e40797 | 91 | static char *rundir; |
c9cb3e7d | 92 | static int lockfile_fd = -1; |
3bd1e081 | 93 | |
0bb7724a DG |
94 | /* Set to 1 when a SIGUSR1 signal is received. */ |
95 | static int recv_child_signal; | |
96 | ||
a23ec3a7 DG |
97 | /* |
98 | * Consumer daemon specific control data. Every value not initialized here is | |
99 | * set to 0 by the static definition. | |
100 | */ | |
3bd1e081 MD |
101 | static struct consumer_data kconsumer_data = { |
102 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
103 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
104 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
03550b58 MD |
105 | .err_sock = -1, |
106 | .cmd_sock = -1, | |
173af62f DG |
107 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
108 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
109 | .cond = PTHREAD_COND_INITIALIZER, |
110 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 111 | }; |
7753dea8 MD |
112 | static struct consumer_data ustconsumer64_data = { |
113 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
114 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
115 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
116 | .err_sock = -1, |
117 | .cmd_sock = -1, | |
173af62f DG |
118 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
119 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
120 | .cond = PTHREAD_COND_INITIALIZER, |
121 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
122 | }; |
123 | static struct consumer_data ustconsumer32_data = { | |
124 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
125 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
126 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
127 | .err_sock = -1, |
128 | .cmd_sock = -1, | |
173af62f DG |
129 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
130 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
131 | .cond = PTHREAD_COND_INITIALIZER, |
132 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
133 | }; |
134 | ||
26296c48 JG |
135 | /* Command line options */ |
136 | static const struct option long_options[] = { | |
0f5ea17c JG |
137 | { "client-sock", required_argument, 0, 'c' }, |
138 | { "apps-sock", required_argument, 0, 'a' }, | |
139 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
140 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
141 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
142 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
143 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
144 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
145 | { "consumerd32-path", required_argument, 0, '\0' }, | |
146 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
147 | { "consumerd64-path", required_argument, 0, '\0' }, | |
148 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
149 | { "daemonize", no_argument, 0, 'd' }, | |
150 | { "background", no_argument, 0, 'b' }, | |
151 | { "sig-parent", no_argument, 0, 'S' }, | |
152 | { "help", no_argument, 0, 'h' }, | |
153 | { "group", required_argument, 0, 'g' }, | |
154 | { "version", no_argument, 0, 'V' }, | |
155 | { "quiet", no_argument, 0, 'q' }, | |
156 | { "verbose", no_argument, 0, 'v' }, | |
157 | { "verbose-consumer", no_argument, 0, '\0' }, | |
158 | { "no-kernel", no_argument, 0, '\0' }, | |
159 | { "pidfile", required_argument, 0, 'p' }, | |
160 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
161 | { "config", required_argument, 0, 'f' }, | |
162 | { "load", required_argument, 0, 'l' }, | |
163 | { "kmod-probes", required_argument, 0, '\0' }, | |
164 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
26296c48 JG |
165 | { NULL, 0, 0, 0 } |
166 | }; | |
167 | ||
168 | /* Command line options to ignore from configuration file */ | |
169 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
170 | ||
26c9d55e | 171 | /* Shared between threads */ |
099e26bd | 172 | static int dispatch_thread_exit; |
fac6795d | 173 | |
54d01ffb DG |
174 | /* Global application Unix socket path */ |
175 | static char apps_unix_sock_path[PATH_MAX]; | |
176 | /* Global client Unix socket path */ | |
177 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
178 | /* global wait shm path for UST */ |
179 | static char wait_shm_path[PATH_MAX]; | |
44a5e5eb DG |
180 | /* Global health check unix path */ |
181 | static char health_unix_sock_path[PATH_MAX]; | |
fac6795d | 182 | |
1d4b027a | 183 | /* Sockets and FDs */ |
a4b35e07 MD |
184 | static int client_sock = -1; |
185 | static int apps_sock = -1; | |
2f77fc4b | 186 | int kernel_tracer_fd = -1; |
76d7553f | 187 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 188 | |
273ea72c DG |
189 | /* |
190 | * Quit pipe for all threads. This permits a single cancellation point | |
191 | * for all threads when receiving an event on the pipe. | |
192 | */ | |
76d7553f | 193 | static int thread_quit_pipe[2] = { -1, -1 }; |
4a15001e | 194 | static int ht_cleanup_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; |
5eb91c98 | 215 | |
099e26bd DG |
216 | /* |
217 | * UST registration command queue. This queue is tied with a futex and uses a N | |
218 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
219 | * | |
b22c5da8 DG |
220 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
221 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
222 | * the line new application socket and monitors it for any I/O error or clean | |
223 | * close that triggers an unregistration of the application. | |
099e26bd DG |
224 | */ |
225 | static struct ust_cmd_queue ust_cmd_queue; | |
226 | ||
b5541356 DG |
227 | /* |
228 | * Pointer initialized before thread creation. | |
229 | * | |
230 | * This points to the tracing session list containing the session count and a | |
231 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
232 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 233 | * |
d063d709 | 234 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 235 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
236 | */ |
237 | static struct ltt_session_list *session_list_ptr; | |
238 | ||
7753dea8 MD |
239 | int ust_consumerd64_fd = -1; |
240 | int ust_consumerd32_fd = -1; | |
241 | ||
fb6f1fa2 YB |
242 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
243 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
244 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
245 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
26296c48 JG |
246 | static int consumerd32_bin_override; |
247 | static int consumerd64_bin_override; | |
248 | static int consumerd32_libdir_override; | |
249 | static int consumerd64_libdir_override; | |
fb09408a | 250 | |
2f77fc4b DG |
251 | static const char *module_proc_lttng = "/proc/lttng"; |
252 | ||
5c827ce0 DG |
253 | /* |
254 | * Consumer daemon state which is changed when spawning it, killing it or in | |
255 | * case of a fatal error. | |
256 | */ | |
257 | enum consumerd_state { | |
258 | CONSUMER_STARTED = 1, | |
259 | CONSUMER_STOPPED = 2, | |
260 | CONSUMER_ERROR = 3, | |
261 | }; | |
262 | ||
263 | /* | |
264 | * This consumer daemon state is used to validate if a client command will be | |
265 | * able to reach the consumer. If not, the client is informed. For instance, | |
266 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
267 | * error to the client. | |
268 | * | |
269 | * The following example shows a possible race condition of this scheme: | |
270 | * | |
271 | * consumer thread error happens | |
272 | * client cmd arrives | |
273 | * client cmd checks state -> still OK | |
274 | * consumer thread exit, sets error | |
275 | * client cmd try to talk to consumer | |
276 | * ... | |
277 | * | |
278 | * However, since the consumer is a different daemon, we have no way of making | |
279 | * sure the command will reach it safely even with this state flag. This is why | |
280 | * we consider that up to the state validation during command processing, the | |
281 | * command is safe. After that, we can not guarantee the correctness of the | |
282 | * client request vis-a-vis the consumer. | |
283 | */ | |
284 | static enum consumerd_state ust_consumerd_state; | |
285 | static enum consumerd_state kernel_consumerd_state; | |
286 | ||
ae9e45b3 DG |
287 | /* |
288 | * Socket timeout for receiving and sending in seconds. | |
289 | */ | |
290 | static int app_socket_timeout; | |
291 | ||
12744796 DG |
292 | /* Set in main() with the current page size. */ |
293 | long page_size; | |
294 | ||
8782cc74 MD |
295 | /* Application health monitoring */ |
296 | struct health_app *health_sessiond; | |
297 | ||
022d91ba DG |
298 | /* Agent TCP port for registration. Used by the agent thread. */ |
299 | unsigned int agent_tcp_port = DEFAULT_AGENT_TCP_PORT; | |
4d076222 | 300 | |
f43f95a9 DG |
301 | /* Am I root or not. */ |
302 | int is_root; /* Set to 1 if the daemon is running as root */ | |
303 | ||
26296c48 JG |
304 | const char * const config_section_name = "sessiond"; |
305 | ||
ef367a93 JG |
306 | /* Load session thread information to operate. */ |
307 | struct load_session_thread_data *load_info; | |
308 | ||
7c1d2758 JG |
309 | /* Global hash tables */ |
310 | struct lttng_ht *agent_apps_ht_by_sock = NULL; | |
311 | ||
97bc1426 MD |
312 | /* |
313 | * Whether sessiond is ready for commands/health check requests. | |
314 | * NR_LTTNG_SESSIOND_READY must match the number of calls to | |
ef367a93 | 315 | * sessiond_notify_ready(). |
97bc1426 | 316 | */ |
ef367a93 | 317 | #define NR_LTTNG_SESSIOND_READY 3 |
97bc1426 MD |
318 | int lttng_sessiond_ready = NR_LTTNG_SESSIOND_READY; |
319 | ||
320 | /* Notify parents that we are ready for cmd and health check */ | |
ef367a93 JG |
321 | LTTNG_HIDDEN |
322 | void sessiond_notify_ready(void) | |
97bc1426 MD |
323 | { |
324 | if (uatomic_sub_return(<tng_sessiond_ready, 1) == 0) { | |
325 | /* | |
326 | * Notify parent pid that we are ready to accept command | |
327 | * for client side. This ppid is the one from the | |
328 | * external process that spawned us. | |
329 | */ | |
330 | if (opt_sig_parent) { | |
331 | kill(ppid, SIGUSR1); | |
332 | } | |
333 | ||
334 | /* | |
335 | * Notify the parent of the fork() process that we are | |
336 | * ready. | |
337 | */ | |
72dd7491 | 338 | if (opt_daemon || opt_background) { |
97bc1426 MD |
339 | kill(child_ppid, SIGUSR1); |
340 | } | |
341 | } | |
342 | } | |
343 | ||
fb09408a | 344 | static |
7753dea8 | 345 | void setup_consumerd_path(void) |
fb09408a | 346 | { |
fc7a59ce | 347 | const char *bin, *libdir; |
fb09408a | 348 | |
7753dea8 MD |
349 | /* |
350 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
351 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
352 | * has not been defined. | |
7753dea8 | 353 | */ |
ebaeda94 | 354 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
355 | if (!consumerd32_bin[0]) { |
356 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
357 | } |
358 | if (!consumerd32_libdir[0]) { | |
359 | consumerd32_libdir = INSTALL_LIB_PATH; | |
360 | } | |
361 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
362 | if (!consumerd64_bin[0]) { |
363 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 364 | } |
ebaeda94 MD |
365 | if (!consumerd64_libdir[0]) { |
366 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
367 | } |
368 | #else | |
369 | #error "Unknown bitness" | |
370 | #endif | |
371 | ||
fb09408a MD |
372 | /* |
373 | * runtime env. var. overrides the build default. | |
374 | */ | |
e8fa9fb0 | 375 | bin = lttng_secure_getenv("LTTNG_CONSUMERD32_BIN"); |
fc7a59ce AM |
376 | if (bin) { |
377 | consumerd32_bin = bin; | |
7753dea8 | 378 | } |
e8fa9fb0 | 379 | bin = lttng_secure_getenv("LTTNG_CONSUMERD64_BIN"); |
fc7a59ce AM |
380 | if (bin) { |
381 | consumerd64_bin = bin; | |
ebaeda94 | 382 | } |
e8fa9fb0 | 383 | libdir = lttng_secure_getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
384 | if (libdir) { |
385 | consumerd32_libdir = libdir; | |
386 | } | |
e8fa9fb0 | 387 | libdir = lttng_secure_getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
388 | if (libdir) { |
389 | consumerd64_libdir = libdir; | |
fb09408a MD |
390 | } |
391 | } | |
392 | ||
4a15001e MD |
393 | static |
394 | int __sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size, | |
395 | int *a_pipe) | |
5eb91c98 DG |
396 | { |
397 | int ret; | |
398 | ||
d0b96690 | 399 | assert(events); |
5eb91c98 DG |
400 | |
401 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
402 | if (ret < 0) { | |
403 | goto error; | |
404 | } | |
405 | ||
406 | /* Add quit pipe */ | |
4a15001e | 407 | ret = lttng_poll_add(events, a_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
408 | if (ret < 0) { |
409 | goto error; | |
410 | } | |
411 | ||
412 | return 0; | |
413 | ||
414 | error: | |
415 | return ret; | |
416 | } | |
417 | ||
4a15001e MD |
418 | /* |
419 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
420 | */ | |
421 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) | |
422 | { | |
423 | return __sessiond_set_thread_pollset(events, size, thread_quit_pipe); | |
424 | } | |
425 | ||
426 | /* | |
427 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
428 | */ | |
429 | int sessiond_set_ht_cleanup_thread_pollset(struct lttng_poll_event *events, | |
430 | size_t size) | |
431 | { | |
432 | return __sessiond_set_thread_pollset(events, size, | |
433 | ht_cleanup_quit_pipe); | |
434 | } | |
435 | ||
436 | static | |
437 | int __sessiond_check_thread_quit_pipe(int fd, uint32_t events, int a_pipe) | |
438 | { | |
439 | if (fd == a_pipe && (events & LPOLLIN)) { | |
440 | return 1; | |
441 | } | |
442 | return 0; | |
443 | } | |
444 | ||
5eb91c98 DG |
445 | /* |
446 | * Check if the thread quit pipe was triggered. | |
447 | * | |
448 | * Return 1 if it was triggered else 0; | |
449 | */ | |
d0b96690 | 450 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
5eb91c98 | 451 | { |
4a15001e MD |
452 | return __sessiond_check_thread_quit_pipe(fd, events, |
453 | thread_quit_pipe[0]); | |
454 | } | |
5eb91c98 | 455 | |
4a15001e MD |
456 | /* |
457 | * Check if the ht_cleanup thread quit pipe was triggered. | |
458 | * | |
459 | * Return 1 if it was triggered else 0; | |
460 | */ | |
461 | int sessiond_check_ht_cleanup_quit(int fd, uint32_t events) | |
462 | { | |
463 | return __sessiond_check_thread_quit_pipe(fd, events, | |
464 | ht_cleanup_quit_pipe[0]); | |
5eb91c98 DG |
465 | } |
466 | ||
273ea72c | 467 | /* |
5eb91c98 | 468 | * Init thread quit pipe. |
273ea72c DG |
469 | * |
470 | * Return -1 on error or 0 if all pipes are created. | |
471 | */ | |
4a15001e | 472 | static int __init_thread_quit_pipe(int *a_pipe) |
273ea72c | 473 | { |
730389d9 | 474 | int ret, i; |
273ea72c | 475 | |
4a15001e | 476 | ret = pipe(a_pipe); |
273ea72c | 477 | if (ret < 0) { |
730389d9 | 478 | PERROR("thread quit pipe"); |
273ea72c DG |
479 | goto error; |
480 | } | |
481 | ||
730389d9 | 482 | for (i = 0; i < 2; i++) { |
4a15001e | 483 | ret = fcntl(a_pipe[i], F_SETFD, FD_CLOEXEC); |
730389d9 DG |
484 | if (ret < 0) { |
485 | PERROR("fcntl"); | |
486 | goto error; | |
487 | } | |
488 | } | |
489 | ||
273ea72c DG |
490 | error: |
491 | return ret; | |
492 | } | |
493 | ||
4a15001e MD |
494 | static int init_thread_quit_pipe(void) |
495 | { | |
496 | return __init_thread_quit_pipe(thread_quit_pipe); | |
497 | } | |
498 | ||
499 | static int init_ht_cleanup_quit_pipe(void) | |
500 | { | |
501 | return __init_thread_quit_pipe(ht_cleanup_quit_pipe); | |
502 | } | |
503 | ||
099e26bd DG |
504 | /* |
505 | * Stop all threads by closing the thread quit pipe. | |
506 | */ | |
cf3af59e MD |
507 | static void stop_threads(void) |
508 | { | |
5eb91c98 DG |
509 | int ret; |
510 | ||
cf3af59e MD |
511 | /* Stopping all threads */ |
512 | DBG("Terminating all threads"); | |
54d01ffb | 513 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
514 | if (ret < 0) { |
515 | ERR("write error on thread quit pipe"); | |
516 | } | |
517 | ||
099e26bd | 518 | /* Dispatch thread */ |
26c9d55e | 519 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 520 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
521 | } |
522 | ||
e975f9f8 DG |
523 | /* |
524 | * Close every consumer sockets. | |
525 | */ | |
526 | static void close_consumer_sockets(void) | |
527 | { | |
528 | int ret; | |
529 | ||
530 | if (kconsumer_data.err_sock >= 0) { | |
531 | ret = close(kconsumer_data.err_sock); | |
532 | if (ret < 0) { | |
533 | PERROR("kernel consumer err_sock close"); | |
534 | } | |
535 | } | |
536 | if (ustconsumer32_data.err_sock >= 0) { | |
537 | ret = close(ustconsumer32_data.err_sock); | |
538 | if (ret < 0) { | |
a76cbd9f | 539 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
540 | } |
541 | } | |
542 | if (ustconsumer64_data.err_sock >= 0) { | |
543 | ret = close(ustconsumer64_data.err_sock); | |
544 | if (ret < 0) { | |
a76cbd9f | 545 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
546 | } |
547 | } | |
548 | if (kconsumer_data.cmd_sock >= 0) { | |
549 | ret = close(kconsumer_data.cmd_sock); | |
550 | if (ret < 0) { | |
551 | PERROR("kernel consumer cmd_sock close"); | |
552 | } | |
553 | } | |
554 | if (ustconsumer32_data.cmd_sock >= 0) { | |
555 | ret = close(ustconsumer32_data.cmd_sock); | |
556 | if (ret < 0) { | |
a76cbd9f | 557 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
558 | } |
559 | } | |
560 | if (ustconsumer64_data.cmd_sock >= 0) { | |
561 | ret = close(ustconsumer64_data.cmd_sock); | |
562 | if (ret < 0) { | |
a76cbd9f | 563 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
564 | } |
565 | } | |
566 | } | |
567 | ||
c9cb3e7d JG |
568 | /* |
569 | * Generate the full lock file path using the rundir. | |
570 | * | |
571 | * Return the snprintf() return value thus a negative value is an error. | |
572 | */ | |
573 | static int generate_lock_file_path(char *path, size_t len) | |
574 | { | |
575 | int ret; | |
576 | ||
577 | assert(path); | |
578 | assert(rundir); | |
579 | ||
580 | /* Build lockfile path from rundir. */ | |
581 | ret = snprintf(path, len, "%s/" DEFAULT_LTTNG_SESSIOND_LOCKFILE, rundir); | |
582 | if (ret < 0) { | |
583 | PERROR("snprintf lockfile path"); | |
584 | } | |
585 | ||
586 | return ret; | |
587 | } | |
588 | ||
fac6795d | 589 | /* |
4a15001e | 590 | * Cleanup the session daemon's data structures. |
fac6795d | 591 | */ |
4a15001e | 592 | static void sessiond_cleanup(void) |
fac6795d | 593 | { |
ef599319 | 594 | int ret; |
af9737e9 | 595 | struct ltt_session *sess, *stmp; |
8c6c56c2 | 596 | char path[PATH_MAX]; |
fac6795d | 597 | |
4a15001e | 598 | DBG("Cleanup sessiond"); |
e07ae692 | 599 | |
4e449f3f MD |
600 | /* |
601 | * Close the thread quit pipe. It has already done its job, | |
602 | * since we are now called. | |
603 | */ | |
2f77fc4b DG |
604 | utils_close_pipe(thread_quit_pipe); |
605 | ||
35f90c40 DG |
606 | /* |
607 | * If opt_pidfile is undefined, the default file will be wiped when | |
608 | * removing the rundir. | |
609 | */ | |
610 | if (opt_pidfile) { | |
611 | ret = remove(opt_pidfile); | |
612 | if (ret < 0) { | |
613 | PERROR("remove pidfile %s", opt_pidfile); | |
614 | } | |
615 | } | |
616 | ||
8c6c56c2 MD |
617 | DBG("Removing sessiond and consumerd content of directory %s", rundir); |
618 | ||
619 | /* sessiond */ | |
620 | snprintf(path, PATH_MAX, | |
621 | "%s/%s", | |
622 | rundir, DEFAULT_LTTNG_SESSIOND_PIDFILE); | |
623 | DBG("Removing %s", path); | |
624 | (void) unlink(path); | |
625 | ||
cd9290dd | 626 | snprintf(path, PATH_MAX, "%s/%s", rundir, |
022d91ba | 627 | DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE); |
cd9290dd DG |
628 | DBG("Removing %s", path); |
629 | (void) unlink(path); | |
630 | ||
8c6c56c2 MD |
631 | /* kconsumerd */ |
632 | snprintf(path, PATH_MAX, | |
633 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, | |
634 | rundir); | |
635 | DBG("Removing %s", path); | |
636 | (void) unlink(path); | |
637 | ||
638 | snprintf(path, PATH_MAX, | |
639 | DEFAULT_KCONSUMERD_PATH, | |
640 | rundir); | |
641 | DBG("Removing directory %s", path); | |
642 | (void) rmdir(path); | |
643 | ||
644 | /* ust consumerd 32 */ | |
645 | snprintf(path, PATH_MAX, | |
646 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, | |
647 | rundir); | |
648 | DBG("Removing %s", path); | |
649 | (void) unlink(path); | |
650 | ||
651 | snprintf(path, PATH_MAX, | |
652 | DEFAULT_USTCONSUMERD32_PATH, | |
653 | rundir); | |
654 | DBG("Removing directory %s", path); | |
655 | (void) rmdir(path); | |
656 | ||
657 | /* ust consumerd 64 */ | |
658 | snprintf(path, PATH_MAX, | |
659 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, | |
660 | rundir); | |
661 | DBG("Removing %s", path); | |
662 | (void) unlink(path); | |
663 | ||
664 | snprintf(path, PATH_MAX, | |
665 | DEFAULT_USTCONSUMERD64_PATH, | |
666 | rundir); | |
667 | DBG("Removing directory %s", path); | |
668 | (void) rmdir(path); | |
5461b305 | 669 | |
99bab54f | 670 | DBG("Cleaning up all sessions"); |
fac6795d | 671 | |
b5541356 | 672 | /* Destroy session list mutex */ |
273ea72c DG |
673 | if (session_list_ptr != NULL) { |
674 | pthread_mutex_destroy(&session_list_ptr->lock); | |
675 | ||
676 | /* Cleanup ALL session */ | |
54d01ffb DG |
677 | cds_list_for_each_entry_safe(sess, stmp, |
678 | &session_list_ptr->head, list) { | |
2f77fc4b | 679 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
680 | } |
681 | } | |
682 | ||
6a4e4039 JG |
683 | DBG("Cleaning up all agent apps"); |
684 | agent_app_ht_clean(); | |
685 | ||
099e26bd | 686 | DBG("Closing all UST sockets"); |
56fff090 | 687 | ust_app_clean_list(); |
7972aab2 | 688 | buffer_reg_destroy_registries(); |
099e26bd | 689 | |
4fba7219 DG |
690 | if (is_root && !opt_no_kernel) { |
691 | DBG2("Closing kernel fd"); | |
a4b35e07 | 692 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
693 | ret = close(kernel_tracer_fd); |
694 | if (ret) { | |
695 | PERROR("close"); | |
696 | } | |
a4b35e07 | 697 | } |
2f50c8a3 | 698 | DBG("Unloading kernel modules"); |
096102bd | 699 | modprobe_remove_lttng_all(); |
834978fd | 700 | free(syscall_table); |
2f50c8a3 | 701 | } |
2f77fc4b | 702 | |
e975f9f8 DG |
703 | close_consumer_sockets(); |
704 | ||
ef367a93 JG |
705 | if (load_info) { |
706 | load_session_destroy_data(load_info); | |
707 | free(load_info); | |
708 | } | |
709 | ||
c9cb3e7d JG |
710 | /* |
711 | * Cleanup lock file by deleting it and finaly closing it which will | |
712 | * release the file system lock. | |
713 | */ | |
714 | if (lockfile_fd >= 0) { | |
715 | char lockfile_path[PATH_MAX]; | |
716 | ||
4a15001e MD |
717 | ret = generate_lock_file_path(lockfile_path, |
718 | sizeof(lockfile_path)); | |
c9cb3e7d JG |
719 | if (ret > 0) { |
720 | ret = remove(lockfile_path); | |
721 | if (ret < 0) { | |
722 | PERROR("remove lock file"); | |
723 | } | |
724 | ret = close(lockfile_fd); | |
725 | if (ret < 0) { | |
726 | PERROR("close lock file"); | |
727 | } | |
728 | } | |
729 | } | |
730 | ||
731 | /* | |
732 | * We do NOT rmdir rundir because there are other processes | |
733 | * using it, for instance lttng-relayd, which can start in | |
734 | * parallel with this teardown. | |
735 | */ | |
736 | ||
737 | free(rundir); | |
4a15001e MD |
738 | } |
739 | ||
740 | /* | |
741 | * Cleanup the daemon's option data structures. | |
742 | */ | |
743 | static void sessiond_cleanup_options(void) | |
744 | { | |
745 | DBG("Cleaning up options"); | |
746 | ||
747 | /* | |
748 | * If the override option is set, the pointer points to a *non* const | |
749 | * thus freeing it even though the variable type is set to const. | |
750 | */ | |
751 | if (tracing_group_name_override) { | |
752 | free((void *) tracing_group_name); | |
753 | } | |
754 | if (consumerd32_bin_override) { | |
755 | free((void *) consumerd32_bin); | |
756 | } | |
757 | if (consumerd64_bin_override) { | |
758 | free((void *) consumerd64_bin); | |
759 | } | |
760 | if (consumerd32_libdir_override) { | |
761 | free((void *) consumerd32_libdir); | |
762 | } | |
763 | if (consumerd64_libdir_override) { | |
764 | free((void *) consumerd64_libdir); | |
765 | } | |
766 | ||
767 | free(opt_pidfile); | |
768 | free(opt_load_session_path); | |
769 | free(kmod_probes_list); | |
770 | free(kmod_extra_probes_list); | |
c9cb3e7d | 771 | |
421cb601 | 772 | /* <fun> */ |
f56a39af | 773 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
774 | "Matthew, BEET driven development works!%c[%dm", |
775 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
776 | /* </fun> */ | |
fac6795d DG |
777 | } |
778 | ||
e065084a | 779 | /* |
d063d709 | 780 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 781 | * |
d063d709 | 782 | * Return lttcomm error code. |
e065084a DG |
783 | */ |
784 | static int send_unix_sock(int sock, void *buf, size_t len) | |
785 | { | |
786 | /* Check valid length */ | |
c617c0c6 | 787 | if (len == 0) { |
e065084a DG |
788 | return -1; |
789 | } | |
790 | ||
791 | return lttcomm_send_unix_sock(sock, buf, len); | |
792 | } | |
793 | ||
5461b305 | 794 | /* |
d063d709 | 795 | * Free memory of a command context structure. |
5461b305 | 796 | */ |
a2fb29a5 | 797 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 798 | { |
a2fb29a5 DG |
799 | DBG("Clean command context structure"); |
800 | if (*cmd_ctx) { | |
801 | if ((*cmd_ctx)->llm) { | |
802 | free((*cmd_ctx)->llm); | |
5461b305 | 803 | } |
a2fb29a5 DG |
804 | if ((*cmd_ctx)->lsm) { |
805 | free((*cmd_ctx)->lsm); | |
5461b305 | 806 | } |
a2fb29a5 DG |
807 | free(*cmd_ctx); |
808 | *cmd_ctx = NULL; | |
5461b305 DG |
809 | } |
810 | } | |
811 | ||
fac6795d | 812 | /* |
0fdd1e2c | 813 | * Notify UST applications using the shm mmap futex. |
fac6795d | 814 | */ |
0fdd1e2c | 815 | static int notify_ust_apps(int active) |
fac6795d | 816 | { |
0fdd1e2c | 817 | char *wait_shm_mmap; |
fac6795d | 818 | |
0fdd1e2c | 819 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 820 | |
0fdd1e2c DG |
821 | /* See shm.c for this call implying mmap, shm and futex calls */ |
822 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
823 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
824 | goto error; |
825 | } | |
826 | ||
0fdd1e2c DG |
827 | /* Wake waiting process */ |
828 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
829 | ||
830 | /* Apps notified successfully */ | |
831 | return 0; | |
fac6795d DG |
832 | |
833 | error: | |
0fdd1e2c | 834 | return -1; |
fac6795d DG |
835 | } |
836 | ||
e065084a | 837 | /* |
d063d709 DG |
838 | * Setup the outgoing data buffer for the response (llm) by allocating the |
839 | * right amount of memory and copying the original information from the lsm | |
840 | * structure. | |
ca95a216 | 841 | * |
d063d709 | 842 | * Return total size of the buffer pointed by buf. |
ca95a216 | 843 | */ |
5461b305 | 844 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 845 | { |
f3ed775e | 846 | int ret, buf_size; |
ca95a216 | 847 | |
f3ed775e | 848 | buf_size = size; |
5461b305 | 849 | |
ba7f0ae5 | 850 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 851 | if (cmd_ctx->llm == NULL) { |
76d7553f | 852 | PERROR("zmalloc"); |
5461b305 | 853 | ret = -ENOMEM; |
ca95a216 DG |
854 | goto error; |
855 | } | |
856 | ||
5461b305 DG |
857 | /* Copy common data */ |
858 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 859 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 860 | |
5461b305 DG |
861 | cmd_ctx->llm->data_size = size; |
862 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
863 | ||
ca95a216 DG |
864 | return buf_size; |
865 | ||
866 | error: | |
867 | return ret; | |
868 | } | |
869 | ||
7a485870 | 870 | /* |
5eb91c98 | 871 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 872 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 873 | */ |
5eb91c98 | 874 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 875 | { |
5eb91c98 | 876 | int ret; |
7a485870 DG |
877 | struct ltt_session *session; |
878 | struct ltt_kernel_channel *channel; | |
879 | ||
5eb91c98 | 880 | DBG("Updating kernel poll set"); |
7a485870 | 881 | |
54d01ffb | 882 | session_lock_list(); |
b5541356 | 883 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 884 | session_lock(session); |
7a485870 | 885 | if (session->kernel_session == NULL) { |
54d01ffb | 886 | session_unlock(session); |
7a485870 DG |
887 | continue; |
888 | } | |
7a485870 | 889 | |
54d01ffb DG |
890 | cds_list_for_each_entry(channel, |
891 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
892 | /* Add channel fd to the kernel poll set */ |
893 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
894 | if (ret < 0) { | |
54d01ffb | 895 | session_unlock(session); |
5eb91c98 DG |
896 | goto error; |
897 | } | |
898 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 899 | } |
54d01ffb | 900 | session_unlock(session); |
7a485870 | 901 | } |
54d01ffb | 902 | session_unlock_list(); |
7a485870 | 903 | |
5eb91c98 | 904 | return 0; |
7a485870 DG |
905 | |
906 | error: | |
54d01ffb | 907 | session_unlock_list(); |
7a485870 DG |
908 | return -1; |
909 | } | |
910 | ||
911 | /* | |
54d01ffb | 912 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 913 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 914 | * |
d063d709 | 915 | * Useful for CPU hotplug feature. |
7a485870 | 916 | */ |
2bdd86d4 | 917 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
918 | { |
919 | int ret = 0; | |
920 | struct ltt_session *session; | |
173af62f | 921 | struct ltt_kernel_session *ksess; |
7a485870 DG |
922 | struct ltt_kernel_channel *channel; |
923 | ||
924 | DBG("Updating kernel streams for channel fd %d", fd); | |
925 | ||
54d01ffb | 926 | session_lock_list(); |
b5541356 | 927 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 928 | session_lock(session); |
7a485870 | 929 | if (session->kernel_session == NULL) { |
54d01ffb | 930 | session_unlock(session); |
7a485870 DG |
931 | continue; |
932 | } | |
173af62f | 933 | ksess = session->kernel_session; |
d9800920 | 934 | |
4a15001e MD |
935 | cds_list_for_each_entry(channel, |
936 | &ksess->channel_list.head, list) { | |
937 | struct lttng_ht_iter iter; | |
938 | struct consumer_socket *socket; | |
d9800920 | 939 | |
4a15001e MD |
940 | if (channel->fd != fd) { |
941 | continue; | |
942 | } | |
943 | DBG("Channel found, updating kernel streams"); | |
944 | ret = kernel_open_channel_stream(channel); | |
945 | if (ret < 0) { | |
946 | goto error; | |
947 | } | |
948 | /* Update the stream global counter */ | |
949 | ksess->stream_count_global += ret; | |
950 | ||
951 | /* | |
952 | * Have we already sent fds to the consumer? If yes, it | |
953 | * means that tracing is started so it is safe to send | |
954 | * our updated stream fds. | |
955 | */ | |
956 | if (ksess->consumer_fds_sent != 1 | |
957 | || ksess->consumer == NULL) { | |
958 | ret = -1; | |
959 | goto error; | |
960 | } | |
961 | ||
962 | rcu_read_lock(); | |
963 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
964 | &iter.iter, socket, node.node) { | |
965 | pthread_mutex_lock(socket->lock); | |
966 | ret = kernel_consumer_send_channel_stream(socket, | |
967 | channel, ksess, | |
968 | session->output_traces ? 1 : 0); | |
969 | pthread_mutex_unlock(socket->lock); | |
970 | if (ret < 0) { | |
e7fe706f | 971 | rcu_read_unlock(); |
4a15001e | 972 | goto error; |
7a485870 | 973 | } |
7a485870 | 974 | } |
4a15001e | 975 | rcu_read_unlock(); |
7a485870 | 976 | } |
54d01ffb | 977 | session_unlock(session); |
7a485870 | 978 | } |
54d01ffb | 979 | session_unlock_list(); |
b3c750d2 | 980 | return ret; |
7a485870 | 981 | |
b3c750d2 | 982 | error: |
54d01ffb DG |
983 | session_unlock(session); |
984 | session_unlock_list(); | |
7a485870 DG |
985 | return ret; |
986 | } | |
987 | ||
487cf67c | 988 | /* |
ffe60014 DG |
989 | * For each tracing session, update newly registered apps. The session list |
990 | * lock MUST be acquired before calling this. | |
487cf67c DG |
991 | */ |
992 | static void update_ust_app(int app_sock) | |
993 | { | |
994 | struct ltt_session *sess, *stmp; | |
995 | ||
fdadac08 DG |
996 | /* Consumer is in an ERROR state. Stop any application update. */ |
997 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
998 | /* Stop the update process since the consumer is dead. */ | |
999 | return; | |
1000 | } | |
1001 | ||
487cf67c DG |
1002 | /* For all tracing session(s) */ |
1003 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
a9ad0c8f MD |
1004 | struct ust_app *app; |
1005 | ||
4ee14516 | 1006 | session_lock(sess); |
a9ad0c8f MD |
1007 | if (!sess->ust_session) { |
1008 | goto unlock_session; | |
1009 | } | |
1010 | ||
1011 | rcu_read_lock(); | |
1012 | assert(app_sock >= 0); | |
1013 | app = ust_app_find_by_sock(app_sock); | |
1014 | if (app == NULL) { | |
1015 | /* | |
1016 | * Application can be unregistered before so | |
1017 | * this is possible hence simply stopping the | |
1018 | * update. | |
1019 | */ | |
1020 | DBG3("UST app update failed to find app sock %d", | |
1021 | app_sock); | |
1022 | goto unlock_rcu; | |
421cb601 | 1023 | } |
a9ad0c8f MD |
1024 | ust_app_global_update(sess->ust_session, app); |
1025 | unlock_rcu: | |
1026 | rcu_read_unlock(); | |
1027 | unlock_session: | |
4ee14516 | 1028 | session_unlock(sess); |
487cf67c DG |
1029 | } |
1030 | } | |
1031 | ||
7a485870 | 1032 | /* |
d063d709 | 1033 | * This thread manage event coming from the kernel. |
7a485870 | 1034 | * |
d063d709 DG |
1035 | * Features supported in this thread: |
1036 | * -) CPU Hotplug | |
7a485870 DG |
1037 | */ |
1038 | static void *thread_manage_kernel(void *data) | |
1039 | { | |
139ac872 | 1040 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 1041 | uint32_t revents, nb_fd; |
7a485870 | 1042 | char tmp; |
5eb91c98 | 1043 | struct lttng_poll_event events; |
7a485870 | 1044 | |
6993eeb3 | 1045 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 1046 | |
6c71277b | 1047 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 1048 | |
d5d63bf1 DG |
1049 | /* |
1050 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 1051 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 1052 | */ |
6d737ce4 | 1053 | lttng_poll_init(&events); |
d5d63bf1 | 1054 | |
e547b070 | 1055 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
1056 | goto error_testpoint; |
1057 | } | |
8ac94142 | 1058 | |
840cb59c | 1059 | health_code_update(); |
44a5e5eb | 1060 | |
e547b070 | 1061 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 1062 | goto error_testpoint; |
6993eeb3 CB |
1063 | } |
1064 | ||
7a485870 | 1065 | while (1) { |
840cb59c | 1066 | health_code_update(); |
44a5e5eb | 1067 | |
7a485870 | 1068 | if (update_poll_flag == 1) { |
d21b0d71 DG |
1069 | /* Clean events object. We are about to populate it again. */ |
1070 | lttng_poll_clean(&events); | |
1071 | ||
d0b96690 | 1072 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
1073 | if (ret < 0) { |
1074 | goto error_poll_create; | |
1075 | } | |
1076 | ||
1077 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
1078 | if (ret < 0) { | |
1079 | goto error; | |
1080 | } | |
5f822d0a | 1081 | |
d21b0d71 | 1082 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
1083 | ret = update_kernel_poll(&events); |
1084 | if (ret < 0) { | |
7a485870 DG |
1085 | goto error; |
1086 | } | |
1087 | update_poll_flag = 0; | |
1088 | } | |
1089 | ||
7fa2082e | 1090 | DBG("Thread kernel polling"); |
7a485870 DG |
1091 | |
1092 | /* Poll infinite value of time */ | |
88f2b785 | 1093 | restart: |
a78af745 | 1094 | health_poll_entry(); |
5eb91c98 | 1095 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1096 | DBG("Thread kernel return from poll on %d fds", |
1097 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1098 | health_poll_exit(); |
7a485870 | 1099 | if (ret < 0) { |
88f2b785 MD |
1100 | /* |
1101 | * Restart interrupted system call. | |
1102 | */ | |
1103 | if (errno == EINTR) { | |
1104 | goto restart; | |
1105 | } | |
7a485870 DG |
1106 | goto error; |
1107 | } else if (ret == 0) { | |
1108 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
1109 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
1110 | "This should not have happened! Continuing..."); | |
7a485870 DG |
1111 | continue; |
1112 | } | |
1113 | ||
0d9c5d77 DG |
1114 | nb_fd = ret; |
1115 | ||
5eb91c98 DG |
1116 | for (i = 0; i < nb_fd; i++) { |
1117 | /* Fetch once the poll data */ | |
1118 | revents = LTTNG_POLL_GETEV(&events, i); | |
1119 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 1120 | |
840cb59c | 1121 | health_code_update(); |
44a5e5eb | 1122 | |
fd20dac9 MD |
1123 | if (!revents) { |
1124 | /* No activity for this FD (poll implementation). */ | |
1125 | continue; | |
1126 | } | |
1127 | ||
5eb91c98 | 1128 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1129 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1130 | if (ret) { |
139ac872 MD |
1131 | err = 0; |
1132 | goto exit; | |
5eb91c98 | 1133 | } |
7a485870 | 1134 | |
5eb91c98 DG |
1135 | /* Check for data on kernel pipe */ |
1136 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
6cd525e8 MD |
1137 | (void) lttng_read(kernel_poll_pipe[0], |
1138 | &tmp, 1); | |
f921c78f DG |
1139 | /* |
1140 | * Ret value is useless here, if this pipe gets any actions an | |
1141 | * update is required anyway. | |
1142 | */ | |
5eb91c98 DG |
1143 | update_poll_flag = 1; |
1144 | continue; | |
1145 | } else { | |
1146 | /* | |
1147 | * New CPU detected by the kernel. Adding kernel stream to | |
1148 | * kernel session and updating the kernel consumer | |
1149 | */ | |
1150 | if (revents & LPOLLIN) { | |
2bdd86d4 | 1151 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
1152 | if (ret < 0) { |
1153 | continue; | |
1154 | } | |
1155 | break; | |
1156 | /* | |
1157 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
1158 | * and unregister kernel stream at this point. | |
1159 | */ | |
7a485870 | 1160 | } |
7a485870 DG |
1161 | } |
1162 | } | |
1163 | } | |
1164 | ||
139ac872 | 1165 | exit: |
7a485870 | 1166 | error: |
5eb91c98 | 1167 | lttng_poll_clean(&events); |
76d7553f | 1168 | error_poll_create: |
6993eeb3 | 1169 | error_testpoint: |
6620da75 DG |
1170 | utils_close_pipe(kernel_poll_pipe); |
1171 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 1172 | if (err) { |
840cb59c | 1173 | health_error(); |
139ac872 | 1174 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
1175 | WARN("Kernel thread died unexpectedly. " |
1176 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 1177 | } |
8782cc74 | 1178 | health_unregister(health_sessiond); |
76d7553f | 1179 | DBG("Kernel thread dying"); |
7a485870 DG |
1180 | return NULL; |
1181 | } | |
1182 | ||
a23ec3a7 DG |
1183 | /* |
1184 | * Signal pthread condition of the consumer data that the thread. | |
1185 | */ | |
1186 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
1187 | { | |
1188 | pthread_mutex_lock(&data->cond_mutex); | |
1189 | ||
1190 | /* | |
1191 | * The state is set before signaling. It can be any value, it's the waiter | |
1192 | * job to correctly interpret this condition variable associated to the | |
1193 | * consumer pthread_cond. | |
1194 | * | |
1195 | * A value of 0 means that the corresponding thread of the consumer data | |
1196 | * was not started. 1 indicates that the thread has started and is ready | |
1197 | * for action. A negative value means that there was an error during the | |
1198 | * thread bootstrap. | |
1199 | */ | |
1200 | data->consumer_thread_is_ready = state; | |
1201 | (void) pthread_cond_signal(&data->cond); | |
1202 | ||
1203 | pthread_mutex_unlock(&data->cond_mutex); | |
1204 | } | |
1205 | ||
1d4b027a | 1206 | /* |
3bd1e081 | 1207 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1208 | */ |
3bd1e081 | 1209 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1210 | { |
42fc1d0b | 1211 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 1212 | uint32_t revents, nb_fd; |
1d4b027a | 1213 | enum lttcomm_return_code code; |
5eb91c98 | 1214 | struct lttng_poll_event events; |
3bd1e081 | 1215 | struct consumer_data *consumer_data = data; |
1d4b027a | 1216 | |
3bd1e081 | 1217 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1218 | |
34c1e15a MD |
1219 | rcu_register_thread(); |
1220 | rcu_thread_online(); | |
1221 | ||
6c71277b | 1222 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1223 | |
855060f8 | 1224 | health_code_update(); |
9449cc75 | 1225 | |
5eb91c98 | 1226 | /* |
331744e3 JD |
1227 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1228 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1229 | */ |
331744e3 | 1230 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1231 | if (ret < 0) { |
76d7553f | 1232 | goto error_poll; |
5eb91c98 | 1233 | } |
273ea72c | 1234 | |
edb8b045 DG |
1235 | /* |
1236 | * The error socket here is already in a listening state which was done | |
1237 | * just before spawning this thread to avoid a race between the consumer | |
1238 | * daemon exec trying to connect and the listen() call. | |
1239 | */ | |
3bd1e081 | 1240 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1241 | if (ret < 0) { |
1242 | goto error; | |
1243 | } | |
1244 | ||
840cb59c | 1245 | health_code_update(); |
44a5e5eb | 1246 | |
331744e3 | 1247 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1248 | restart: |
a78af745 | 1249 | health_poll_entry(); |
8ac94142 | 1250 | |
e547b070 | 1251 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
1252 | goto error; |
1253 | } | |
8ac94142 | 1254 | |
5eb91c98 | 1255 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1256 | health_poll_exit(); |
273ea72c | 1257 | if (ret < 0) { |
88f2b785 MD |
1258 | /* |
1259 | * Restart interrupted system call. | |
1260 | */ | |
1261 | if (errno == EINTR) { | |
1262 | goto restart; | |
1263 | } | |
273ea72c DG |
1264 | goto error; |
1265 | } | |
1266 | ||
0d9c5d77 DG |
1267 | nb_fd = ret; |
1268 | ||
5eb91c98 DG |
1269 | for (i = 0; i < nb_fd; i++) { |
1270 | /* Fetch once the poll data */ | |
1271 | revents = LTTNG_POLL_GETEV(&events, i); | |
1272 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1273 | ||
840cb59c | 1274 | health_code_update(); |
44a5e5eb | 1275 | |
fd20dac9 MD |
1276 | if (!revents) { |
1277 | /* No activity for this FD (poll implementation). */ | |
1278 | continue; | |
1279 | } | |
1280 | ||
5eb91c98 | 1281 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1282 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1283 | if (ret) { |
139ac872 MD |
1284 | err = 0; |
1285 | goto exit; | |
5eb91c98 DG |
1286 | } |
1287 | ||
1288 | /* Event on the registration socket */ | |
3bd1e081 | 1289 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 1290 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 1291 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
1292 | goto error; |
1293 | } | |
1294 | } | |
273ea72c DG |
1295 | } |
1296 | ||
3bd1e081 | 1297 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1298 | if (sock < 0) { |
1299 | goto error; | |
1300 | } | |
1301 | ||
b662582b DG |
1302 | /* |
1303 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1304 | * show must go on. | |
1305 | */ | |
1306 | (void) utils_set_fd_cloexec(sock); | |
1307 | ||
840cb59c | 1308 | health_code_update(); |
44a5e5eb | 1309 | |
3bd1e081 | 1310 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1311 | |
712ea556 | 1312 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1313 | ret = lttcomm_recv_unix_sock(sock, &code, |
1314 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1315 | if (ret <= 0) { |
1316 | goto error; | |
1317 | } | |
1318 | ||
840cb59c | 1319 | health_code_update(); |
f73fabfd | 1320 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
331744e3 | 1321 | /* Connect both socket, command and metadata. */ |
3bd1e081 MD |
1322 | consumer_data->cmd_sock = |
1323 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
4ce514c4 | 1324 | consumer_data->metadata_fd = |
331744e3 | 1325 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); |
92db7cdc DG |
1326 | if (consumer_data->cmd_sock < 0 |
1327 | || consumer_data->metadata_fd < 0) { | |
331744e3 | 1328 | PERROR("consumer connect cmd socket"); |
a23ec3a7 DG |
1329 | /* On error, signal condition and quit. */ |
1330 | signal_consumer_condition(consumer_data, -1); | |
1d4b027a DG |
1331 | goto error; |
1332 | } | |
9363801e | 1333 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; |
331744e3 JD |
1334 | /* Create metadata socket lock. */ |
1335 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1336 | if (consumer_data->metadata_sock.lock == NULL) { | |
1337 | PERROR("zmalloc pthread mutex"); | |
1338 | ret = -1; | |
1339 | goto error; | |
1340 | } | |
1341 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1342 | ||
a23ec3a7 | 1343 | signal_consumer_condition(consumer_data, 1); |
331744e3 JD |
1344 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); |
1345 | DBG("Consumer metadata socket ready (fd: %d)", | |
4ce514c4 | 1346 | consumer_data->metadata_fd); |
1d4b027a | 1347 | } else { |
3bd1e081 | 1348 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1349 | lttcomm_get_readable_code(-code)); |
1350 | goto error; | |
1351 | } | |
1352 | ||
331744e3 | 1353 | /* Remove the consumerd error sock since we've established a connexion */ |
3bd1e081 | 1354 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1355 | if (ret < 0) { |
72079cae DG |
1356 | goto error; |
1357 | } | |
1358 | ||
331744e3 | 1359 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1360 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1361 | if (ret < 0) { | |
72079cae | 1362 | goto error; |
5eb91c98 DG |
1363 | } |
1364 | ||
331744e3 | 1365 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1366 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1367 | LPOLLIN | LPOLLRDHUP); |
1368 | if (ret < 0) { | |
1369 | goto error; | |
1370 | } | |
1371 | ||
840cb59c | 1372 | health_code_update(); |
44a5e5eb | 1373 | |
331744e3 | 1374 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1375 | restart_poll: |
331744e3 | 1376 | while (1) { |
42fc1d0b DG |
1377 | health_code_update(); |
1378 | ||
1379 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
1380 | if (should_quit) { | |
1381 | /* Not a health error. */ | |
1382 | err = 0; | |
1383 | goto exit; | |
1384 | } | |
1385 | ||
331744e3 JD |
1386 | health_poll_entry(); |
1387 | ret = lttng_poll_wait(&events, -1); | |
1388 | health_poll_exit(); | |
1389 | if (ret < 0) { | |
1390 | /* | |
1391 | * Restart interrupted system call. | |
1392 | */ | |
1393 | if (errno == EINTR) { | |
1394 | goto restart_poll; | |
1395 | } | |
1396 | goto error; | |
88f2b785 | 1397 | } |
72079cae | 1398 | |
331744e3 | 1399 | nb_fd = ret; |
0d9c5d77 | 1400 | |
331744e3 JD |
1401 | for (i = 0; i < nb_fd; i++) { |
1402 | /* Fetch once the poll data */ | |
1403 | revents = LTTNG_POLL_GETEV(&events, i); | |
1404 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1405 | |
331744e3 | 1406 | health_code_update(); |
44a5e5eb | 1407 | |
fd20dac9 MD |
1408 | if (!revents) { |
1409 | /* No activity for this FD (poll implementation). */ | |
1410 | continue; | |
1411 | } | |
1412 | ||
42fc1d0b DG |
1413 | /* |
1414 | * Thread quit pipe has been triggered, flag that we should stop | |
1415 | * but continue the current loop to handle potential data from | |
1416 | * consumer. | |
1417 | */ | |
1418 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 1419 | |
331744e3 JD |
1420 | if (pollfd == sock) { |
1421 | /* Event on the consumerd socket */ | |
1422 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1423 | ERR("consumer err socket second poll error"); | |
1424 | goto error; | |
1425 | } | |
1426 | health_code_update(); | |
1427 | /* Wait for any kconsumerd error */ | |
1428 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1429 | sizeof(enum lttcomm_return_code)); | |
1430 | if (ret <= 0) { | |
1431 | ERR("consumer closed the command socket"); | |
1432 | goto error; | |
1433 | } | |
1434 | ||
1435 | ERR("consumer return code : %s", | |
1436 | lttcomm_get_readable_code(-code)); | |
1437 | ||
1438 | goto exit; | |
4ce514c4 | 1439 | } else if (pollfd == consumer_data->metadata_fd) { |
331744e3 JD |
1440 | /* UST metadata requests */ |
1441 | ret = ust_consumer_metadata_request( | |
1442 | &consumer_data->metadata_sock); | |
1443 | if (ret < 0) { | |
1444 | ERR("Handling metadata request"); | |
1445 | goto error; | |
1446 | } | |
5eb91c98 | 1447 | } |
42fc1d0b | 1448 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 1449 | } |
331744e3 | 1450 | health_code_update(); |
5eb91c98 DG |
1451 | } |
1452 | ||
139ac872 | 1453 | exit: |
1d4b027a | 1454 | error: |
fdadac08 DG |
1455 | /* |
1456 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1457 | * thread might be using them so get exclusive access which will abort all |
1458 | * other consumer command by other threads. | |
fdadac08 DG |
1459 | */ |
1460 | pthread_mutex_lock(&consumer_data->lock); | |
1461 | ||
5c827ce0 DG |
1462 | /* Immediately set the consumerd state to stopped */ |
1463 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1464 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1465 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1466 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1467 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1468 | } else { | |
1469 | /* Code flow error... */ | |
1470 | assert(0); | |
1471 | } | |
1472 | ||
76d7553f MD |
1473 | if (consumer_data->err_sock >= 0) { |
1474 | ret = close(consumer_data->err_sock); | |
1475 | if (ret) { | |
1476 | PERROR("close"); | |
1477 | } | |
a76cbd9f | 1478 | consumer_data->err_sock = -1; |
76d7553f MD |
1479 | } |
1480 | if (consumer_data->cmd_sock >= 0) { | |
1481 | ret = close(consumer_data->cmd_sock); | |
1482 | if (ret) { | |
1483 | PERROR("close"); | |
1484 | } | |
a76cbd9f | 1485 | consumer_data->cmd_sock = -1; |
76d7553f | 1486 | } |
96544455 SS |
1487 | if (consumer_data->metadata_sock.fd_ptr && |
1488 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1489 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1490 | if (ret) { |
1491 | PERROR("close"); | |
1492 | } | |
1493 | } | |
76d7553f MD |
1494 | if (sock >= 0) { |
1495 | ret = close(sock); | |
1496 | if (ret) { | |
1497 | PERROR("close"); | |
1498 | } | |
1499 | } | |
273ea72c | 1500 | |
3bd1e081 MD |
1501 | unlink(consumer_data->err_unix_sock_path); |
1502 | unlink(consumer_data->cmd_unix_sock_path); | |
1503 | consumer_data->pid = 0; | |
fdadac08 | 1504 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1505 | |
fdadac08 | 1506 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1507 | if (consumer_data->metadata_sock.lock) { |
1508 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1509 | free(consumer_data->metadata_sock.lock); | |
1510 | } | |
5eb91c98 | 1511 | lttng_poll_clean(&events); |
76d7553f | 1512 | error_poll: |
139ac872 | 1513 | if (err) { |
840cb59c | 1514 | health_error(); |
139ac872 MD |
1515 | ERR("Health error occurred in %s", __func__); |
1516 | } | |
8782cc74 | 1517 | health_unregister(health_sessiond); |
76d7553f | 1518 | DBG("consumer thread cleanup completed"); |
0177d773 | 1519 | |
34c1e15a MD |
1520 | rcu_thread_offline(); |
1521 | rcu_unregister_thread(); | |
1522 | ||
5eb91c98 | 1523 | return NULL; |
099e26bd DG |
1524 | } |
1525 | ||
099e26bd DG |
1526 | /* |
1527 | * This thread manage application communication. | |
1d4b027a DG |
1528 | */ |
1529 | static void *thread_manage_apps(void *data) | |
099e26bd | 1530 | { |
139ac872 | 1531 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1532 | ssize_t size_ret; |
5eb91c98 | 1533 | uint32_t revents, nb_fd; |
5eb91c98 | 1534 | struct lttng_poll_event events; |
099e26bd DG |
1535 | |
1536 | DBG("[thread] Manage application started"); | |
1537 | ||
f6a9efaa DG |
1538 | rcu_register_thread(); |
1539 | rcu_thread_online(); | |
1540 | ||
6c71277b | 1541 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1542 | |
e547b070 | 1543 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1544 | goto error_testpoint; |
1545 | } | |
1546 | ||
840cb59c | 1547 | health_code_update(); |
44a5e5eb | 1548 | |
d0b96690 | 1549 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1550 | if (ret < 0) { |
76d7553f | 1551 | goto error_poll_create; |
5eb91c98 | 1552 | } |
099e26bd | 1553 | |
5eb91c98 DG |
1554 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1555 | if (ret < 0) { | |
1556 | goto error; | |
1557 | } | |
099e26bd | 1558 | |
e547b070 | 1559 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1560 | goto error; |
1561 | } | |
8ac94142 | 1562 | |
840cb59c | 1563 | health_code_update(); |
44a5e5eb | 1564 | |
5eb91c98 | 1565 | while (1) { |
7fa2082e | 1566 | DBG("Apps thread polling"); |
099e26bd DG |
1567 | |
1568 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1569 | restart: |
a78af745 | 1570 | health_poll_entry(); |
5eb91c98 | 1571 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1572 | DBG("Apps thread return from poll on %d fds", |
1573 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1574 | health_poll_exit(); |
099e26bd | 1575 | if (ret < 0) { |
88f2b785 MD |
1576 | /* |
1577 | * Restart interrupted system call. | |
1578 | */ | |
1579 | if (errno == EINTR) { | |
1580 | goto restart; | |
1581 | } | |
099e26bd DG |
1582 | goto error; |
1583 | } | |
1584 | ||
0d9c5d77 DG |
1585 | nb_fd = ret; |
1586 | ||
5eb91c98 DG |
1587 | for (i = 0; i < nb_fd; i++) { |
1588 | /* Fetch once the poll data */ | |
1589 | revents = LTTNG_POLL_GETEV(&events, i); | |
1590 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1591 | ||
840cb59c | 1592 | health_code_update(); |
44a5e5eb | 1593 | |
fd20dac9 MD |
1594 | if (!revents) { |
1595 | /* No activity for this FD (poll implementation). */ | |
1596 | continue; | |
1597 | } | |
1598 | ||
5eb91c98 | 1599 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1600 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1601 | if (ret) { |
139ac872 MD |
1602 | err = 0; |
1603 | goto exit; | |
5eb91c98 | 1604 | } |
099e26bd | 1605 | |
5eb91c98 DG |
1606 | /* Inspect the apps cmd pipe */ |
1607 | if (pollfd == apps_cmd_pipe[0]) { | |
1608 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1609 | ERR("Apps command pipe error"); | |
0177d773 | 1610 | goto error; |
5eb91c98 | 1611 | } else if (revents & LPOLLIN) { |
d0b96690 DG |
1612 | int sock; |
1613 | ||
5eb91c98 | 1614 | /* Empty pipe */ |
6cd525e8 MD |
1615 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1616 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1617 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1618 | goto error; |
1619 | } | |
099e26bd | 1620 | |
840cb59c | 1621 | health_code_update(); |
44a5e5eb | 1622 | |
ffe60014 | 1623 | /* |
d0b96690 DG |
1624 | * We only monitor the error events of the socket. This |
1625 | * thread does not handle any incoming data from UST | |
1626 | * (POLLIN). | |
ffe60014 | 1627 | */ |
d0b96690 DG |
1628 | ret = lttng_poll_add(&events, sock, |
1629 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1630 | if (ret < 0) { | |
5eb91c98 | 1631 | goto error; |
e0c7ec2b | 1632 | } |
acc7b41b | 1633 | |
d0b96690 | 1634 | DBG("Apps with sock %d added to poll set", sock); |
0177d773 | 1635 | } |
5eb91c98 DG |
1636 | } else { |
1637 | /* | |
54d01ffb DG |
1638 | * At this point, we know that a registered application made |
1639 | * the event at poll_wait. | |
5eb91c98 DG |
1640 | */ |
1641 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1642 | /* Removing from the poll set */ | |
1643 | ret = lttng_poll_del(&events, pollfd); | |
1644 | if (ret < 0) { | |
1645 | goto error; | |
1646 | } | |
099e26bd | 1647 | |
b9d9b220 | 1648 | /* Socket closed on remote end. */ |
56fff090 | 1649 | ust_app_unregister(pollfd); |
5eb91c98 | 1650 | } |
099e26bd | 1651 | } |
44a5e5eb | 1652 | |
840cb59c | 1653 | health_code_update(); |
099e26bd | 1654 | } |
099e26bd DG |
1655 | } |
1656 | ||
139ac872 | 1657 | exit: |
099e26bd | 1658 | error: |
5eb91c98 | 1659 | lttng_poll_clean(&events); |
76d7553f | 1660 | error_poll_create: |
6993eeb3 | 1661 | error_testpoint: |
6620da75 DG |
1662 | utils_close_pipe(apps_cmd_pipe); |
1663 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1664 | ||
1665 | /* | |
1666 | * We don't clean the UST app hash table here since already registered | |
1667 | * applications can still be controlled so let them be until the session | |
1668 | * daemon dies or the applications stop. | |
1669 | */ | |
1670 | ||
139ac872 | 1671 | if (err) { |
840cb59c | 1672 | health_error(); |
139ac872 MD |
1673 | ERR("Health error occurred in %s", __func__); |
1674 | } | |
8782cc74 | 1675 | health_unregister(health_sessiond); |
76d7553f | 1676 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1677 | rcu_thread_offline(); |
1678 | rcu_unregister_thread(); | |
099e26bd DG |
1679 | return NULL; |
1680 | } | |
1681 | ||
d0b96690 | 1682 | /* |
d88aee68 DG |
1683 | * Send a socket to a thread This is called from the dispatch UST registration |
1684 | * thread once all sockets are set for the application. | |
d0b96690 | 1685 | * |
b85dc84c DG |
1686 | * The sock value can be invalid, we don't really care, the thread will handle |
1687 | * it and make the necessary cleanup if so. | |
1688 | * | |
d0b96690 DG |
1689 | * On success, return 0 else a negative value being the errno message of the |
1690 | * write(). | |
1691 | */ | |
d88aee68 | 1692 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1693 | { |
6cd525e8 | 1694 | ssize_t ret; |
d0b96690 | 1695 | |
b85dc84c DG |
1696 | /* |
1697 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1698 | * before calling this function being a shutdown state of the thread. | |
1699 | */ | |
1700 | if (fd < 0) { | |
1701 | ret = -EBADF; | |
1702 | goto error; | |
1703 | } | |
d0b96690 | 1704 | |
6cd525e8 MD |
1705 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1706 | if (ret < sizeof(sock)) { | |
d88aee68 | 1707 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1708 | if (ret < 0) { |
1709 | ret = -errno; | |
1710 | } | |
1711 | goto error; | |
1712 | } | |
1713 | ||
1714 | /* All good. Don't send back the write positive ret value. */ | |
1715 | ret = 0; | |
1716 | error: | |
6cd525e8 | 1717 | return (int) ret; |
d0b96690 DG |
1718 | } |
1719 | ||
f45e313d DG |
1720 | /* |
1721 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1722 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1723 | * notify socket is never received. | |
1724 | */ | |
1725 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1726 | { | |
1727 | int ret, nb_fd = 0, i; | |
1728 | unsigned int fd_added = 0; | |
1729 | struct lttng_poll_event events; | |
1730 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1731 | ||
1732 | assert(wait_queue); | |
1733 | ||
1734 | lttng_poll_init(&events); | |
1735 | ||
1736 | /* Just skip everything for an empty queue. */ | |
1737 | if (!wait_queue->count) { | |
1738 | goto end; | |
1739 | } | |
1740 | ||
1741 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1742 | if (ret < 0) { | |
1743 | goto error_create; | |
1744 | } | |
1745 | ||
1746 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1747 | &wait_queue->head, head) { | |
1748 | assert(wait_node->app); | |
1749 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1750 | LPOLLHUP | LPOLLERR); | |
1751 | if (ret < 0) { | |
1752 | goto error; | |
1753 | } | |
1754 | ||
1755 | fd_added = 1; | |
1756 | } | |
1757 | ||
1758 | if (!fd_added) { | |
1759 | goto end; | |
1760 | } | |
1761 | ||
1762 | /* | |
1763 | * Poll but don't block so we can quickly identify the faulty events and | |
1764 | * clean them afterwards from the wait queue. | |
1765 | */ | |
1766 | ret = lttng_poll_wait(&events, 0); | |
1767 | if (ret < 0) { | |
1768 | goto error; | |
1769 | } | |
1770 | nb_fd = ret; | |
1771 | ||
1772 | for (i = 0; i < nb_fd; i++) { | |
1773 | /* Get faulty FD. */ | |
1774 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1775 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1776 | ||
fd20dac9 MD |
1777 | if (!revents) { |
1778 | /* No activity for this FD (poll implementation). */ | |
1779 | continue; | |
1780 | } | |
1781 | ||
f45e313d DG |
1782 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1783 | &wait_queue->head, head) { | |
1784 | if (pollfd == wait_node->app->sock && | |
1785 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1786 | cds_list_del(&wait_node->head); | |
1787 | wait_queue->count--; | |
1788 | ust_app_destroy(wait_node->app); | |
1789 | free(wait_node); | |
1790 | break; | |
1791 | } | |
1792 | } | |
1793 | } | |
1794 | ||
1795 | if (nb_fd > 0) { | |
1796 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1797 | } | |
1798 | ||
1799 | end: | |
1800 | lttng_poll_clean(&events); | |
1801 | return; | |
1802 | ||
1803 | error: | |
1804 | lttng_poll_clean(&events); | |
1805 | error_create: | |
1806 | ERR("Unable to sanitize wait queue"); | |
1807 | return; | |
1808 | } | |
1809 | ||
099e26bd DG |
1810 | /* |
1811 | * Dispatch request from the registration threads to the application | |
1812 | * communication thread. | |
1813 | */ | |
1814 | static void *thread_dispatch_ust_registration(void *data) | |
1815 | { | |
12e2b881 | 1816 | int ret, err = -1; |
8bdee6e2 | 1817 | struct cds_wfcq_node *node; |
099e26bd | 1818 | struct ust_command *ust_cmd = NULL; |
f45e313d DG |
1819 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1820 | struct ust_reg_wait_queue wait_queue = { | |
1821 | .count = 0, | |
1822 | }; | |
d0b96690 | 1823 | |
6c71277b | 1824 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1825 | |
9ad42ec1 MD |
1826 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1827 | goto error_testpoint; | |
1828 | } | |
1829 | ||
12e2b881 MD |
1830 | health_code_update(); |
1831 | ||
f45e313d | 1832 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1833 | |
1834 | DBG("[thread] Dispatch UST command started"); | |
1835 | ||
26c9d55e | 1836 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
12e2b881 MD |
1837 | health_code_update(); |
1838 | ||
099e26bd DG |
1839 | /* Atomically prepare the queue futex */ |
1840 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1841 | ||
1842 | do { | |
d0b96690 | 1843 | struct ust_app *app = NULL; |
7972aab2 | 1844 | ust_cmd = NULL; |
d0b96690 | 1845 | |
f45e313d DG |
1846 | /* |
1847 | * Make sure we don't have node(s) that have hung up before receiving | |
1848 | * the notify socket. This is to clean the list in order to avoid | |
1849 | * memory leaks from notify socket that are never seen. | |
1850 | */ | |
1851 | sanitize_wait_queue(&wait_queue); | |
1852 | ||
12e2b881 | 1853 | health_code_update(); |
099e26bd | 1854 | /* Dequeue command for registration */ |
8bdee6e2 | 1855 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1856 | if (node == NULL) { |
00a17c97 | 1857 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1858 | /* Continue thread execution */ |
1859 | break; | |
1860 | } | |
1861 | ||
1862 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1863 | ||
2f50c8a3 DG |
1864 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1865 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1866 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1867 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1868 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1869 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1870 | |
1871 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1872 | wait_node = zmalloc(sizeof(*wait_node)); | |
1873 | if (!wait_node) { | |
1874 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1875 | ret = close(ust_cmd->sock); |
1876 | if (ret < 0) { | |
1877 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1878 | } | |
51dec90d | 1879 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1880 | free(ust_cmd); |
d0b96690 DG |
1881 | goto error; |
1882 | } | |
1883 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1884 | ||
1885 | /* Create application object if socket is CMD. */ | |
1886 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1887 | ust_cmd->sock); | |
1888 | if (!wait_node->app) { | |
1889 | ret = close(ust_cmd->sock); | |
1890 | if (ret < 0) { | |
1891 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1892 | } |
51dec90d | 1893 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1894 | free(wait_node); |
7972aab2 | 1895 | free(ust_cmd); |
d0b96690 DG |
1896 | continue; |
1897 | } | |
1898 | /* | |
1899 | * Add application to the wait queue so we can set the notify | |
1900 | * socket before putting this object in the global ht. | |
1901 | */ | |
f45e313d DG |
1902 | cds_list_add(&wait_node->head, &wait_queue.head); |
1903 | wait_queue.count++; | |
d0b96690 | 1904 | |
7972aab2 | 1905 | free(ust_cmd); |
d0b96690 DG |
1906 | /* |
1907 | * We have to continue here since we don't have the notify | |
1908 | * socket and the application MUST be added to the hash table | |
1909 | * only at that moment. | |
1910 | */ | |
1911 | continue; | |
1912 | } else { | |
1913 | /* | |
1914 | * Look for the application in the local wait queue and set the | |
1915 | * notify socket if found. | |
1916 | */ | |
d88aee68 | 1917 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1918 | &wait_queue.head, head) { |
12e2b881 | 1919 | health_code_update(); |
d0b96690 DG |
1920 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1921 | wait_node->app->notify_sock = ust_cmd->sock; | |
1922 | cds_list_del(&wait_node->head); | |
f45e313d | 1923 | wait_queue.count--; |
d0b96690 DG |
1924 | app = wait_node->app; |
1925 | free(wait_node); | |
1926 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1927 | break; | |
1928 | } | |
1929 | } | |
020d7f60 DG |
1930 | |
1931 | /* | |
1932 | * With no application at this stage the received socket is | |
1933 | * basically useless so close it before we free the cmd data | |
1934 | * structure for good. | |
1935 | */ | |
1936 | if (!app) { | |
1937 | ret = close(ust_cmd->sock); | |
1938 | if (ret < 0) { | |
1939 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1940 | } | |
51dec90d | 1941 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1942 | } |
7972aab2 | 1943 | free(ust_cmd); |
d0b96690 DG |
1944 | } |
1945 | ||
1946 | if (app) { | |
d0b96690 DG |
1947 | /* |
1948 | * @session_lock_list | |
1949 | * | |
1950 | * Lock the global session list so from the register up to the | |
1951 | * registration done message, no thread can see the application | |
1952 | * and change its state. | |
1953 | */ | |
1954 | session_lock_list(); | |
1955 | rcu_read_lock(); | |
d88aee68 | 1956 | |
d0b96690 DG |
1957 | /* |
1958 | * Add application to the global hash table. This needs to be | |
1959 | * done before the update to the UST registry can locate the | |
1960 | * application. | |
1961 | */ | |
1962 | ust_app_add(app); | |
d88aee68 DG |
1963 | |
1964 | /* Set app version. This call will print an error if needed. */ | |
1965 | (void) ust_app_version(app); | |
1966 | ||
1967 | /* Send notify socket through the notify pipe. */ | |
1968 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1969 | app->notify_sock); | |
1970 | if (ret < 0) { | |
1971 | rcu_read_unlock(); | |
1972 | session_unlock_list(); | |
b85dc84c DG |
1973 | /* |
1974 | * No notify thread, stop the UST tracing. However, this is | |
1975 | * not an internal error of the this thread thus setting | |
1976 | * the health error code to a normal exit. | |
1977 | */ | |
1978 | err = 0; | |
d88aee68 | 1979 | goto error; |
6620da75 | 1980 | } |
d88aee68 | 1981 | |
d0b96690 DG |
1982 | /* |
1983 | * Update newly registered application with the tracing | |
1984 | * registry info already enabled information. | |
1985 | */ | |
1986 | update_ust_app(app->sock); | |
d88aee68 DG |
1987 | |
1988 | /* | |
1989 | * Don't care about return value. Let the manage apps threads | |
1990 | * handle app unregistration upon socket close. | |
1991 | */ | |
1992 | (void) ust_app_register_done(app->sock); | |
1993 | ||
1994 | /* | |
1995 | * Even if the application socket has been closed, send the app | |
1996 | * to the thread and unregistration will take place at that | |
1997 | * place. | |
1998 | */ | |
1999 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 2000 | if (ret < 0) { |
d88aee68 DG |
2001 | rcu_read_unlock(); |
2002 | session_unlock_list(); | |
b85dc84c DG |
2003 | /* |
2004 | * No apps. thread, stop the UST tracing. However, this is | |
2005 | * not an internal error of the this thread thus setting | |
2006 | * the health error code to a normal exit. | |
2007 | */ | |
2008 | err = 0; | |
d88aee68 | 2009 | goto error; |
d0b96690 | 2010 | } |
d88aee68 | 2011 | |
d0b96690 DG |
2012 | rcu_read_unlock(); |
2013 | session_unlock_list(); | |
099e26bd | 2014 | } |
099e26bd DG |
2015 | } while (node != NULL); |
2016 | ||
12e2b881 | 2017 | health_poll_entry(); |
099e26bd DG |
2018 | /* Futex wait on queue. Blocking call on futex() */ |
2019 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 2020 | health_poll_exit(); |
099e26bd | 2021 | } |
12e2b881 MD |
2022 | /* Normal exit, no error */ |
2023 | err = 0; | |
099e26bd DG |
2024 | |
2025 | error: | |
d88aee68 DG |
2026 | /* Clean up wait queue. */ |
2027 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 2028 | &wait_queue.head, head) { |
d88aee68 | 2029 | cds_list_del(&wait_node->head); |
f45e313d | 2030 | wait_queue.count--; |
d88aee68 DG |
2031 | free(wait_node); |
2032 | } | |
2033 | ||
772b8f4d MD |
2034 | /* Empty command queue. */ |
2035 | for (;;) { | |
2036 | /* Dequeue command for registration */ | |
2037 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); | |
2038 | if (node == NULL) { | |
2039 | break; | |
2040 | } | |
2041 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
2042 | ret = close(ust_cmd->sock); | |
2043 | if (ret < 0) { | |
2044 | PERROR("close ust sock exit dispatch %d", ust_cmd->sock); | |
2045 | } | |
2046 | lttng_fd_put(LTTNG_FD_APPS, 1); | |
2047 | free(ust_cmd); | |
2048 | } | |
2049 | ||
9ad42ec1 | 2050 | error_testpoint: |
099e26bd | 2051 | DBG("Dispatch thread dying"); |
12e2b881 MD |
2052 | if (err) { |
2053 | health_error(); | |
2054 | ERR("Health error occurred in %s", __func__); | |
2055 | } | |
8782cc74 | 2056 | health_unregister(health_sessiond); |
099e26bd DG |
2057 | return NULL; |
2058 | } | |
2059 | ||
2060 | /* | |
2061 | * This thread manage application registration. | |
2062 | */ | |
2063 | static void *thread_registration_apps(void *data) | |
1d4b027a | 2064 | { |
139ac872 | 2065 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
2066 | uint32_t revents, nb_fd; |
2067 | struct lttng_poll_event events; | |
099e26bd DG |
2068 | /* |
2069 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
2070 | * freed in the manage apps thread. | |
2071 | */ | |
2072 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 2073 | |
099e26bd | 2074 | DBG("[thread] Manage application registration started"); |
1d4b027a | 2075 | |
6c71277b | 2076 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 2077 | |
e547b070 | 2078 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
2079 | goto error_testpoint; |
2080 | } | |
8ac94142 | 2081 | |
1d4b027a DG |
2082 | ret = lttcomm_listen_unix_sock(apps_sock); |
2083 | if (ret < 0) { | |
76d7553f | 2084 | goto error_listen; |
1d4b027a DG |
2085 | } |
2086 | ||
5eb91c98 DG |
2087 | /* |
2088 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
2089 | * more will be added to this poll set. | |
2090 | */ | |
d0b96690 | 2091 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 2092 | if (ret < 0) { |
76d7553f | 2093 | goto error_create_poll; |
5eb91c98 | 2094 | } |
273ea72c | 2095 | |
5eb91c98 DG |
2096 | /* Add the application registration socket */ |
2097 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
2098 | if (ret < 0) { | |
76d7553f | 2099 | goto error_poll_add; |
5eb91c98 | 2100 | } |
273ea72c | 2101 | |
1d4b027a | 2102 | /* Notify all applications to register */ |
0fdd1e2c DG |
2103 | ret = notify_ust_apps(1); |
2104 | if (ret < 0) { | |
2105 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
2106 | "Execution continues but there might be problem for already\n" |
2107 | "running applications that wishes to register."); | |
0fdd1e2c | 2108 | } |
1d4b027a DG |
2109 | |
2110 | while (1) { | |
2111 | DBG("Accepting application registration"); | |
273ea72c DG |
2112 | |
2113 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 2114 | restart: |
a78af745 | 2115 | health_poll_entry(); |
5eb91c98 | 2116 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 2117 | health_poll_exit(); |
273ea72c | 2118 | if (ret < 0) { |
88f2b785 MD |
2119 | /* |
2120 | * Restart interrupted system call. | |
2121 | */ | |
2122 | if (errno == EINTR) { | |
2123 | goto restart; | |
2124 | } | |
273ea72c DG |
2125 | goto error; |
2126 | } | |
2127 | ||
0d9c5d77 DG |
2128 | nb_fd = ret; |
2129 | ||
5eb91c98 | 2130 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 2131 | health_code_update(); |
139ac872 | 2132 | |
5eb91c98 DG |
2133 | /* Fetch once the poll data */ |
2134 | revents = LTTNG_POLL_GETEV(&events, i); | |
2135 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 2136 | |
fd20dac9 MD |
2137 | if (!revents) { |
2138 | /* No activity for this FD (poll implementation). */ | |
2139 | continue; | |
2140 | } | |
2141 | ||
5eb91c98 | 2142 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 2143 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 2144 | if (ret) { |
139ac872 MD |
2145 | err = 0; |
2146 | goto exit; | |
90014c57 | 2147 | } |
1d4b027a | 2148 | |
5eb91c98 DG |
2149 | /* Event on the registration socket */ |
2150 | if (pollfd == apps_sock) { | |
2151 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2152 | ERR("Register apps socket poll error"); | |
2153 | goto error; | |
2154 | } else if (revents & LPOLLIN) { | |
2155 | sock = lttcomm_accept_unix_sock(apps_sock); | |
2156 | if (sock < 0) { | |
2157 | goto error; | |
2158 | } | |
099e26bd | 2159 | |
16c5c8fa DG |
2160 | /* |
2161 | * Set socket timeout for both receiving and ending. | |
2162 | * app_socket_timeout is in seconds, whereas | |
2163 | * lttcomm_setsockopt_rcv_timeout and | |
2164 | * lttcomm_setsockopt_snd_timeout expect msec as | |
2165 | * parameter. | |
2166 | */ | |
2167 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
2168 | app_socket_timeout * 1000); | |
2169 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
2170 | app_socket_timeout * 1000); | |
2171 | ||
b662582b DG |
2172 | /* |
2173 | * Set the CLOEXEC flag. Return code is useless because | |
2174 | * either way, the show must go on. | |
2175 | */ | |
2176 | (void) utils_set_fd_cloexec(sock); | |
2177 | ||
5eb91c98 | 2178 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 2179 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 2180 | if (ust_cmd == NULL) { |
76d7553f | 2181 | PERROR("ust command zmalloc"); |
41ed8e47 MD |
2182 | ret = close(sock); |
2183 | if (ret) { | |
2184 | PERROR("close"); | |
2185 | } | |
5eb91c98 DG |
2186 | goto error; |
2187 | } | |
1d4b027a | 2188 | |
5eb91c98 DG |
2189 | /* |
2190 | * Using message-based transmissions to ensure we don't | |
2191 | * have to deal with partially received messages. | |
2192 | */ | |
4063050c MD |
2193 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
2194 | if (ret < 0) { | |
2195 | ERR("Exhausted file descriptors allowed for applications."); | |
2196 | free(ust_cmd); | |
2197 | ret = close(sock); | |
2198 | if (ret) { | |
2199 | PERROR("close"); | |
2200 | } | |
2201 | sock = -1; | |
2202 | continue; | |
2203 | } | |
d88aee68 | 2204 | |
840cb59c | 2205 | health_code_update(); |
d0b96690 DG |
2206 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
2207 | if (ret < 0) { | |
5eb91c98 | 2208 | free(ust_cmd); |
d0b96690 | 2209 | /* Close socket of the application. */ |
76d7553f MD |
2210 | ret = close(sock); |
2211 | if (ret) { | |
2212 | PERROR("close"); | |
2213 | } | |
4063050c | 2214 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 2215 | sock = -1; |
5eb91c98 DG |
2216 | continue; |
2217 | } | |
840cb59c | 2218 | health_code_update(); |
099e26bd | 2219 | |
5eb91c98 | 2220 | ust_cmd->sock = sock; |
34a2494f | 2221 | sock = -1; |
099e26bd | 2222 | |
5eb91c98 DG |
2223 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2224 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2225 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2226 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2227 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2228 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2229 | |
5eb91c98 DG |
2230 | /* |
2231 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2232 | * has been taken! This apps will be part of the *system*. |
5eb91c98 | 2233 | */ |
8bdee6e2 | 2234 | cds_wfcq_enqueue(&ust_cmd_queue.head, &ust_cmd_queue.tail, &ust_cmd->node); |
5eb91c98 DG |
2235 | |
2236 | /* | |
2237 | * Wake the registration queue futex. Implicit memory | |
8bdee6e2 | 2238 | * barrier with the exchange in cds_wfcq_enqueue. |
5eb91c98 DG |
2239 | */ |
2240 | futex_nto1_wake(&ust_cmd_queue.futex); | |
2241 | } | |
2242 | } | |
90014c57 | 2243 | } |
1d4b027a DG |
2244 | } |
2245 | ||
139ac872 | 2246 | exit: |
1d4b027a | 2247 | error: |
0fdd1e2c DG |
2248 | /* Notify that the registration thread is gone */ |
2249 | notify_ust_apps(0); | |
2250 | ||
a4b35e07 | 2251 | if (apps_sock >= 0) { |
76d7553f MD |
2252 | ret = close(apps_sock); |
2253 | if (ret) { | |
2254 | PERROR("close"); | |
2255 | } | |
a4b35e07 | 2256 | } |
46c3f085 | 2257 | if (sock >= 0) { |
76d7553f MD |
2258 | ret = close(sock); |
2259 | if (ret) { | |
2260 | PERROR("close"); | |
2261 | } | |
4063050c | 2262 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2263 | } |
273ea72c | 2264 | unlink(apps_unix_sock_path); |
0fdd1e2c | 2265 | |
76d7553f | 2266 | error_poll_add: |
5eb91c98 | 2267 | lttng_poll_clean(&events); |
76d7553f MD |
2268 | error_listen: |
2269 | error_create_poll: | |
6993eeb3 | 2270 | error_testpoint: |
76d7553f | 2271 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2272 | if (err) { |
2273 | health_error(); | |
2274 | ERR("Health error occurred in %s", __func__); | |
2275 | } | |
8782cc74 | 2276 | health_unregister(health_sessiond); |
5eb91c98 | 2277 | |
1d4b027a DG |
2278 | return NULL; |
2279 | } | |
2280 | ||
8c0faa1d | 2281 | /* |
3bd1e081 | 2282 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2283 | * exec or it will fails. |
8c0faa1d | 2284 | */ |
3bd1e081 | 2285 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2286 | { |
a23ec3a7 | 2287 | int ret, clock_ret; |
ee0b0061 DG |
2288 | struct timespec timeout; |
2289 | ||
a23ec3a7 DG |
2290 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
2291 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 2292 | |
a23ec3a7 DG |
2293 | /* Setup pthread condition */ |
2294 | ret = pthread_condattr_init(&consumer_data->condattr); | |
4a15001e | 2295 | if (ret) { |
a23ec3a7 DG |
2296 | errno = ret; |
2297 | PERROR("pthread_condattr_init consumer data"); | |
2298 | goto error; | |
2299 | } | |
2300 | ||
2301 | /* | |
2302 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2303 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2304 | * for a more details and how we noticed it. | |
2305 | */ | |
2306 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
4a15001e | 2307 | if (ret) { |
a23ec3a7 DG |
2308 | errno = ret; |
2309 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2310 | goto error; |
2311 | } | |
8c0faa1d | 2312 | |
a23ec3a7 | 2313 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
4a15001e | 2314 | if (ret) { |
a23ec3a7 DG |
2315 | errno = ret; |
2316 | PERROR("pthread_cond_init consumer data"); | |
2317 | goto error; | |
2318 | } | |
2319 | ||
2320 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
2321 | consumer_data); | |
4a15001e MD |
2322 | if (ret) { |
2323 | errno = ret; | |
3bd1e081 | 2324 | PERROR("pthread_create consumer"); |
ee0b0061 | 2325 | ret = -1; |
8c0faa1d DG |
2326 | goto error; |
2327 | } | |
2328 | ||
a23ec3a7 DG |
2329 | /* We are about to wait on a pthread condition */ |
2330 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2331 | ||
ee0b0061 | 2332 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
2333 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
2334 | /* | |
2335 | * Set the timeout for the condition timed wait even if the clock gettime | |
2336 | * call fails since we might loop on that call and we want to avoid to | |
2337 | * increment the timeout too many times. | |
2338 | */ | |
2339 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2340 | ||
2341 | /* | |
2342 | * The following loop COULD be skipped in some conditions so this is why we | |
2343 | * set ret to 0 in order to make sure at least one round of the loop is | |
2344 | * done. | |
2345 | */ | |
2346 | ret = 0; | |
2347 | ||
2348 | /* | |
2349 | * Loop until the condition is reached or when a timeout is reached. Note | |
2350 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2351 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2352 | * possible. This loop does not take any chances and works with both of | |
2353 | * them. | |
2354 | */ | |
2355 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2356 | if (clock_ret < 0) { | |
2357 | PERROR("clock_gettime spawn consumer"); | |
2358 | /* Infinite wait for the consumerd thread to be ready */ | |
2359 | ret = pthread_cond_wait(&consumer_data->cond, | |
2360 | &consumer_data->cond_mutex); | |
2361 | } else { | |
2362 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2363 | &consumer_data->cond_mutex, &timeout); | |
2364 | } | |
ee0b0061 | 2365 | } |
8c0faa1d | 2366 | |
a23ec3a7 DG |
2367 | /* Release the pthread condition */ |
2368 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2369 | ||
2370 | if (ret != 0) { | |
2371 | errno = ret; | |
2372 | if (ret == ETIMEDOUT) { | |
4282f9a3 DG |
2373 | int pth_ret; |
2374 | ||
ee0b0061 DG |
2375 | /* |
2376 | * Call has timed out so we kill the kconsumerd_thread and return | |
2377 | * an error. | |
2378 | */ | |
a23ec3a7 DG |
2379 | ERR("Condition timed out. The consumer thread was never ready." |
2380 | " Killing it"); | |
4282f9a3 DG |
2381 | pth_ret = pthread_cancel(consumer_data->thread); |
2382 | if (pth_ret < 0) { | |
3bd1e081 | 2383 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2384 | } |
2385 | } else { | |
a23ec3a7 | 2386 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 | 2387 | } |
4282f9a3 DG |
2388 | /* Caller is expecting a negative value on failure. */ |
2389 | ret = -1; | |
ee0b0061 DG |
2390 | goto error; |
2391 | } | |
2392 | ||
3bd1e081 MD |
2393 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2394 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2395 | ERR("Consumerd did not start"); |
3bd1e081 | 2396 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2397 | goto error; |
2398 | } | |
3bd1e081 | 2399 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2400 | |
8c0faa1d DG |
2401 | return 0; |
2402 | ||
2403 | error: | |
2404 | return ret; | |
2405 | } | |
2406 | ||
d9800920 | 2407 | /* |
3bd1e081 | 2408 | * Join consumer thread |
d9800920 | 2409 | */ |
3bd1e081 | 2410 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2411 | { |
2412 | void *status; | |
cf3af59e | 2413 | |
e8209f6b DG |
2414 | /* Consumer pid must be a real one. */ |
2415 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2416 | int ret; |
3bd1e081 | 2417 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2418 | if (ret) { |
4a15001e | 2419 | PERROR("Error killing consumer daemon"); |
cf3af59e MD |
2420 | return ret; |
2421 | } | |
3bd1e081 | 2422 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2423 | } else { |
2424 | return 0; | |
2425 | } | |
2426 | } | |
2427 | ||
8c0faa1d | 2428 | /* |
3bd1e081 | 2429 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2430 | * |
d063d709 | 2431 | * Return pid if successful else -1. |
8c0faa1d | 2432 | */ |
3bd1e081 | 2433 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2434 | { |
2435 | int ret; | |
2436 | pid_t pid; | |
94c55f17 | 2437 | const char *consumer_to_use; |
53086306 | 2438 | const char *verbosity; |
94c55f17 | 2439 | struct stat st; |
8c0faa1d | 2440 | |
3bd1e081 | 2441 | DBG("Spawning consumerd"); |
c49dc785 | 2442 | |
8c0faa1d DG |
2443 | pid = fork(); |
2444 | if (pid == 0) { | |
2445 | /* | |
3bd1e081 | 2446 | * Exec consumerd. |
8c0faa1d | 2447 | */ |
daee5345 | 2448 | if (opt_verbose_consumer) { |
53086306 | 2449 | verbosity = "--verbose"; |
4421f712 | 2450 | } else if (lttng_opt_quiet) { |
53086306 | 2451 | verbosity = "--quiet"; |
4421f712 DG |
2452 | } else { |
2453 | verbosity = ""; | |
53086306 | 2454 | } |
4421f712 | 2455 | |
3bd1e081 MD |
2456 | switch (consumer_data->type) { |
2457 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2458 | /* |
c7704d57 DG |
2459 | * Find out which consumerd to execute. We will first try the |
2460 | * 64-bit path, then the sessiond's installation directory, and | |
2461 | * fallback on the 32-bit one, | |
94c55f17 | 2462 | */ |
63a799e8 AM |
2463 | DBG3("Looking for a kernel consumer at these locations:"); |
2464 | DBG3(" 1) %s", consumerd64_bin); | |
2465 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
2466 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 2467 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 2468 | DBG3("Found location #1"); |
94c55f17 | 2469 | consumer_to_use = consumerd64_bin; |
94c55f17 | 2470 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 2471 | DBG3("Found location #2"); |
94c55f17 | 2472 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 2473 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 2474 | DBG3("Found location #3"); |
eb1e0bd4 | 2475 | consumer_to_use = consumerd32_bin; |
94c55f17 | 2476 | } else { |
63a799e8 | 2477 | DBG("Could not find any valid consumerd executable"); |
4282f9a3 | 2478 | ret = -EINVAL; |
94c55f17 AM |
2479 | break; |
2480 | } | |
2481 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
4282f9a3 | 2482 | ret = execl(consumer_to_use, |
94c55f17 AM |
2483 | "lttng-consumerd", verbosity, "-k", |
2484 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2485 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2486 | "--group", tracing_group_name, |
94c55f17 | 2487 | NULL); |
3bd1e081 | 2488 | break; |
7753dea8 MD |
2489 | case LTTNG_CONSUMER64_UST: |
2490 | { | |
b1e0b6b6 | 2491 | char *tmpnew = NULL; |
8f4905da MD |
2492 | |
2493 | if (consumerd64_libdir[0] != '\0') { | |
2494 | char *tmp; | |
2495 | size_t tmplen; | |
2496 | ||
e8fa9fb0 | 2497 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2498 | if (!tmp) { |
2499 | tmp = ""; | |
2500 | } | |
2501 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2502 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
2503 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2504 | if (!tmpnew) { | |
2505 | ret = -ENOMEM; | |
2506 | goto error; | |
2507 | } | |
2508 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2509 | strcat(tmpnew, consumerd64_libdir); | |
2510 | if (tmp[0] != '\0') { | |
2511 | strcat(tmpnew, ":"); | |
2512 | strcat(tmpnew, tmp); | |
2513 | } | |
2514 | ret = putenv(tmpnew); | |
2515 | if (ret) { | |
2516 | ret = -errno; | |
c6f76da9 | 2517 | free(tmpnew); |
8f4905da MD |
2518 | goto error; |
2519 | } | |
2520 | } | |
94c55f17 | 2521 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 2522 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2523 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2524 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2525 | "--group", tracing_group_name, |
7753dea8 | 2526 | NULL); |
8f4905da MD |
2527 | if (consumerd64_libdir[0] != '\0') { |
2528 | free(tmpnew); | |
2529 | } | |
3bd1e081 | 2530 | break; |
7753dea8 MD |
2531 | } |
2532 | case LTTNG_CONSUMER32_UST: | |
2533 | { | |
937dde8e | 2534 | char *tmpnew = NULL; |
8f4905da MD |
2535 | |
2536 | if (consumerd32_libdir[0] != '\0') { | |
2537 | char *tmp; | |
2538 | size_t tmplen; | |
2539 | ||
e8fa9fb0 | 2540 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2541 | if (!tmp) { |
2542 | tmp = ""; | |
2543 | } | |
2544 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2545 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2546 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2547 | if (!tmpnew) { | |
2548 | ret = -ENOMEM; | |
2549 | goto error; | |
2550 | } | |
2551 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2552 | strcat(tmpnew, consumerd32_libdir); | |
2553 | if (tmp[0] != '\0') { | |
2554 | strcat(tmpnew, ":"); | |
2555 | strcat(tmpnew, tmp); | |
2556 | } | |
2557 | ret = putenv(tmpnew); | |
2558 | if (ret) { | |
2559 | ret = -errno; | |
c6f76da9 | 2560 | free(tmpnew); |
8f4905da MD |
2561 | goto error; |
2562 | } | |
2563 | } | |
94c55f17 | 2564 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 2565 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2566 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2567 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2568 | "--group", tracing_group_name, |
7753dea8 | 2569 | NULL); |
8f4905da MD |
2570 | if (consumerd32_libdir[0] != '\0') { |
2571 | free(tmpnew); | |
2572 | } | |
7753dea8 MD |
2573 | break; |
2574 | } | |
3bd1e081 | 2575 | default: |
76d7553f | 2576 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2577 | exit(EXIT_FAILURE); |
2578 | } | |
8c0faa1d | 2579 | if (errno != 0) { |
4282f9a3 | 2580 | PERROR("Consumer execl()"); |
8c0faa1d | 2581 | } |
4282f9a3 | 2582 | /* Reaching this point, we got a failure on our execl(). */ |
8c0faa1d DG |
2583 | exit(EXIT_FAILURE); |
2584 | } else if (pid > 0) { | |
2585 | ret = pid; | |
8c0faa1d | 2586 | } else { |
76d7553f | 2587 | PERROR("start consumer fork"); |
8c0faa1d | 2588 | ret = -errno; |
8c0faa1d | 2589 | } |
8f4905da | 2590 | error: |
8c0faa1d DG |
2591 | return ret; |
2592 | } | |
2593 | ||
693bd40b | 2594 | /* |
3bd1e081 | 2595 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2596 | */ |
3bd1e081 | 2597 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2598 | { |
c617c0c6 | 2599 | int ret; |
edb8b045 DG |
2600 | |
2601 | /* | |
2602 | * Set the listen() state on the socket since there is a possible race | |
2603 | * between the exec() of the consumer daemon and this call if place in the | |
2604 | * consumer thread. See bug #366 for more details. | |
2605 | */ | |
2606 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2607 | if (ret < 0) { | |
2608 | goto error; | |
2609 | } | |
693bd40b | 2610 | |
3bd1e081 MD |
2611 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2612 | if (consumer_data->pid != 0) { | |
2613 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2614 | goto end; |
2615 | } | |
693bd40b | 2616 | |
3bd1e081 | 2617 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2618 | if (ret < 0) { |
3bd1e081 MD |
2619 | ERR("Spawning consumerd failed"); |
2620 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2621 | goto error; |
693bd40b | 2622 | } |
c49dc785 | 2623 | |
3bd1e081 MD |
2624 | /* Setting up the consumer_data pid */ |
2625 | consumer_data->pid = ret; | |
48842b30 | 2626 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2627 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2628 | |
3bd1e081 MD |
2629 | DBG2("Spawning consumer control thread"); |
2630 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2631 | if (ret < 0) { |
3bd1e081 | 2632 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2633 | goto error; |
2634 | } | |
2635 | ||
c49dc785 | 2636 | end: |
693bd40b DG |
2637 | return 0; |
2638 | ||
2639 | error: | |
331744e3 | 2640 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2641 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2642 | int err; |
2643 | ||
edb8b045 DG |
2644 | err = close(consumer_data->err_sock); |
2645 | if (err < 0) { | |
2646 | PERROR("close consumer data error socket"); | |
2647 | } | |
2648 | } | |
693bd40b DG |
2649 | return ret; |
2650 | } | |
2651 | ||
b73401da | 2652 | /* |
096102bd | 2653 | * Setup necessary data for kernel tracer action. |
b73401da | 2654 | */ |
096102bd | 2655 | static int init_kernel_tracer(void) |
b73401da DG |
2656 | { |
2657 | int ret; | |
b73401da | 2658 | |
096102bd DG |
2659 | /* Modprobe lttng kernel modules */ |
2660 | ret = modprobe_lttng_control(); | |
b73401da | 2661 | if (ret < 0) { |
b73401da DG |
2662 | goto error; |
2663 | } | |
2664 | ||
096102bd DG |
2665 | /* Open debugfs lttng */ |
2666 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2667 | if (kernel_tracer_fd < 0) { | |
2668 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
2669 | ret = -1; |
2670 | goto error_open; | |
54d01ffb DG |
2671 | } |
2672 | ||
2f77fc4b DG |
2673 | /* Validate kernel version */ |
2674 | ret = kernel_validate_version(kernel_tracer_fd); | |
2675 | if (ret < 0) { | |
2676 | goto error_version; | |
b551a063 | 2677 | } |
54d01ffb | 2678 | |
2f77fc4b DG |
2679 | ret = modprobe_lttng_data(); |
2680 | if (ret < 0) { | |
2681 | goto error_modules; | |
54d01ffb DG |
2682 | } |
2683 | ||
2f77fc4b DG |
2684 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2685 | return 0; | |
2686 | ||
2687 | error_version: | |
2688 | modprobe_remove_lttng_control(); | |
2689 | ret = close(kernel_tracer_fd); | |
2690 | if (ret) { | |
2691 | PERROR("close"); | |
b551a063 | 2692 | } |
2f77fc4b | 2693 | kernel_tracer_fd = -1; |
f73fabfd | 2694 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2695 | |
2f77fc4b DG |
2696 | error_modules: |
2697 | ret = close(kernel_tracer_fd); | |
2698 | if (ret) { | |
2699 | PERROR("close"); | |
b551a063 | 2700 | } |
54d01ffb | 2701 | |
2f77fc4b DG |
2702 | error_open: |
2703 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2704 | |
2705 | error: | |
2f77fc4b DG |
2706 | WARN("No kernel tracer available"); |
2707 | kernel_tracer_fd = -1; | |
2708 | if (!is_root) { | |
f73fabfd | 2709 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2710 | } else { |
f73fabfd | 2711 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2712 | } |
54d01ffb DG |
2713 | } |
2714 | ||
2f77fc4b | 2715 | |
54d01ffb | 2716 | /* |
2f77fc4b DG |
2717 | * Copy consumer output from the tracing session to the domain session. The |
2718 | * function also applies the right modification on a per domain basis for the | |
2719 | * trace files destination directory. | |
36b588ed MD |
2720 | * |
2721 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2722 | */ |
2f77fc4b | 2723 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2724 | { |
2725 | int ret; | |
2f77fc4b DG |
2726 | const char *dir_name; |
2727 | struct consumer_output *consumer; | |
2728 | ||
2729 | assert(session); | |
2730 | assert(session->consumer); | |
54d01ffb | 2731 | |
b551a063 DG |
2732 | switch (domain) { |
2733 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2734 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2735 | /* |
2736 | * XXX: We should audit the session creation and what this function | |
2737 | * does "extra" in order to avoid a destroy since this function is used | |
2738 | * in the domain session creation (kernel and ust) only. Same for UST | |
2739 | * domain. | |
2740 | */ | |
2741 | if (session->kernel_session->consumer) { | |
6addfa37 | 2742 | consumer_output_put(session->kernel_session->consumer); |
09a90bcd | 2743 | } |
2f77fc4b DG |
2744 | session->kernel_session->consumer = |
2745 | consumer_copy_output(session->consumer); | |
2746 | /* Ease our life a bit for the next part */ | |
2747 | consumer = session->kernel_session->consumer; | |
2748 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2749 | break; |
f20baf8e | 2750 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2751 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2752 | case LTTNG_DOMAIN_PYTHON: |
b551a063 | 2753 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2754 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd | 2755 | if (session->ust_session->consumer) { |
6addfa37 | 2756 | consumer_output_put(session->ust_session->consumer); |
09a90bcd | 2757 | } |
2f77fc4b DG |
2758 | session->ust_session->consumer = |
2759 | consumer_copy_output(session->consumer); | |
2760 | /* Ease our life a bit for the next part */ | |
2761 | consumer = session->ust_session->consumer; | |
2762 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2763 | break; |
2764 | default: | |
f73fabfd | 2765 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2766 | goto error; |
2767 | } | |
2768 | ||
2f77fc4b | 2769 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2770 | strncat(consumer->subdir, dir_name, |
2771 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2772 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2773 | ||
f73fabfd | 2774 | ret = LTTNG_OK; |
54d01ffb DG |
2775 | |
2776 | error: | |
2777 | return ret; | |
2778 | } | |
2779 | ||
00e2e675 | 2780 | /* |
2f77fc4b | 2781 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2782 | * |
2783 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2784 | */ |
2f77fc4b DG |
2785 | static int create_ust_session(struct ltt_session *session, |
2786 | struct lttng_domain *domain) | |
00e2e675 DG |
2787 | { |
2788 | int ret; | |
2f77fc4b | 2789 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2790 | |
a4b92340 | 2791 | assert(session); |
2f77fc4b DG |
2792 | assert(domain); |
2793 | assert(session->consumer); | |
a4b92340 | 2794 | |
2f77fc4b | 2795 | switch (domain->type) { |
f20baf8e | 2796 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2797 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2798 | case LTTNG_DOMAIN_PYTHON: |
2f77fc4b DG |
2799 | case LTTNG_DOMAIN_UST: |
2800 | break; | |
2801 | default: | |
2802 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2803 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2804 | goto error; |
2805 | } | |
2806 | ||
2f77fc4b DG |
2807 | DBG("Creating UST session"); |
2808 | ||
dec56f6c | 2809 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2810 | if (lus == NULL) { |
f73fabfd | 2811 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2812 | goto error; |
2813 | } | |
2814 | ||
2f77fc4b DG |
2815 | lus->uid = session->uid; |
2816 | lus->gid = session->gid; | |
2bba9e53 | 2817 | lus->output_traces = session->output_traces; |
27babd3a | 2818 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2819 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2820 | session->ust_session = lus; |
d7ba1388 | 2821 | if (session->shm_path[0]) { |
3d071855 MD |
2822 | strncpy(lus->root_shm_path, session->shm_path, |
2823 | sizeof(lus->root_shm_path)); | |
2824 | lus->root_shm_path[sizeof(lus->root_shm_path) - 1] = '\0'; | |
d7ba1388 MD |
2825 | strncpy(lus->shm_path, session->shm_path, |
2826 | sizeof(lus->shm_path)); | |
2827 | lus->shm_path[sizeof(lus->shm_path) - 1] = '\0'; | |
2828 | strncat(lus->shm_path, "/ust", | |
2829 | sizeof(lus->shm_path) - strlen(lus->shm_path) - 1); | |
2830 | } | |
2f77fc4b DG |
2831 | /* Copy session output to the newly created UST session */ |
2832 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2833 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2834 | goto error; |
2835 | } | |
2836 | ||
f73fabfd | 2837 | return LTTNG_OK; |
00e2e675 DG |
2838 | |
2839 | error: | |
2f77fc4b DG |
2840 | free(lus); |
2841 | session->ust_session = NULL; | |
00e2e675 DG |
2842 | return ret; |
2843 | } | |
2844 | ||
2845 | /* | |
2f77fc4b | 2846 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2847 | */ |
2f77fc4b | 2848 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2849 | { |
2850 | int ret; | |
a4b92340 | 2851 | |
2f77fc4b | 2852 | DBG("Creating kernel session"); |
00e2e675 | 2853 | |
2f77fc4b DG |
2854 | ret = kernel_create_session(session, kernel_tracer_fd); |
2855 | if (ret < 0) { | |
f73fabfd | 2856 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2857 | goto error; |
2858 | } | |
2859 | ||
2f77fc4b DG |
2860 | /* Code flow safety */ |
2861 | assert(session->kernel_session); | |
2862 | ||
2863 | /* Copy session output to the newly created Kernel session */ | |
2864 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2865 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2866 | goto error; |
2867 | } | |
2868 | ||
2f77fc4b DG |
2869 | /* Create directory(ies) on local filesystem. */ |
2870 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2871 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2872 | ret = run_as_mkdir_recursive( | |
2873 | session->kernel_session->consumer->dst.trace_path, | |
2874 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2875 | if (ret < 0) { | |
df5b86c8 | 2876 | if (errno != EEXIST) { |
2f77fc4b | 2877 | ERR("Trace directory creation error"); |
00e2e675 DG |
2878 | goto error; |
2879 | } | |
00e2e675 | 2880 | } |
2f77fc4b | 2881 | } |
00e2e675 | 2882 | |
2f77fc4b DG |
2883 | session->kernel_session->uid = session->uid; |
2884 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2885 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2886 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2887 | |
f73fabfd | 2888 | return LTTNG_OK; |
00e2e675 | 2889 | |
2f77fc4b DG |
2890 | error: |
2891 | trace_kernel_destroy_session(session->kernel_session); | |
2892 | session->kernel_session = NULL; | |
2893 | return ret; | |
2894 | } | |
00e2e675 | 2895 | |
2f77fc4b DG |
2896 | /* |
2897 | * Count number of session permitted by uid/gid. | |
2898 | */ | |
2899 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2900 | { | |
2901 | unsigned int i = 0; | |
2902 | struct ltt_session *session; | |
07424f16 | 2903 | |
2f77fc4b DG |
2904 | DBG("Counting number of available session for UID %d GID %d", |
2905 | uid, gid); | |
2906 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2907 | /* |
2f77fc4b | 2908 | * Only list the sessions the user can control. |
00e2e675 | 2909 | */ |
2f77fc4b DG |
2910 | if (!session_access_ok(session, uid, gid)) { |
2911 | continue; | |
2912 | } | |
2913 | i++; | |
a4b92340 | 2914 | } |
2f77fc4b | 2915 | return i; |
00e2e675 DG |
2916 | } |
2917 | ||
54d01ffb DG |
2918 | /* |
2919 | * Process the command requested by the lttng client within the command | |
2920 | * context structure. This function make sure that the return structure (llm) | |
2921 | * is set and ready for transmission before returning. | |
2922 | * | |
2923 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2924 | * |
2925 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2926 | * |
2927 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2928 | */ |
53a80697 MD |
2929 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2930 | int *sock_error) | |
54d01ffb | 2931 | { |
f73fabfd | 2932 | int ret = LTTNG_OK; |
44d3bd01 | 2933 | int need_tracing_session = 1; |
2e09ba09 | 2934 | int need_domain; |
54d01ffb DG |
2935 | |
2936 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2937 | ||
53a80697 MD |
2938 | *sock_error = 0; |
2939 | ||
2e09ba09 MD |
2940 | switch (cmd_ctx->lsm->cmd_type) { |
2941 | case LTTNG_CREATE_SESSION: | |
27babd3a | 2942 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2943 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
2944 | case LTTNG_DESTROY_SESSION: |
2945 | case LTTNG_LIST_SESSIONS: | |
2946 | case LTTNG_LIST_DOMAINS: | |
2947 | case LTTNG_START_TRACE: | |
2948 | case LTTNG_STOP_TRACE: | |
6d805429 | 2949 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2950 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2951 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2952 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2953 | case LTTNG_SNAPSHOT_RECORD: | |
fb198a11 | 2954 | case LTTNG_SAVE_SESSION: |
d7ba1388 | 2955 | case LTTNG_SET_SESSION_SHM_PATH: |
2e09ba09 | 2956 | need_domain = 0; |
3aace903 | 2957 | break; |
2e09ba09 MD |
2958 | default: |
2959 | need_domain = 1; | |
2960 | } | |
2961 | ||
2962 | if (opt_no_kernel && need_domain | |
2963 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2964 | if (!is_root) { |
f73fabfd | 2965 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2966 | } else { |
f73fabfd | 2967 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2968 | } |
4fba7219 DG |
2969 | goto error; |
2970 | } | |
2971 | ||
8d3113b2 DG |
2972 | /* Deny register consumer if we already have a spawned consumer. */ |
2973 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2974 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2975 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2976 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2977 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2978 | goto error; |
2979 | } | |
2980 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2981 | } | |
2982 | ||
54d01ffb DG |
2983 | /* |
2984 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2985 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2986 | * command. |
2987 | */ | |
2988 | switch(cmd_ctx->lsm->cmd_type) { | |
2989 | case LTTNG_LIST_SESSIONS: | |
2990 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2991 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2992 | case LTTNG_LIST_DOMAINS: |
2993 | case LTTNG_LIST_CHANNELS: | |
2994 | case LTTNG_LIST_EVENTS: | |
834978fd | 2995 | case LTTNG_LIST_SYSCALLS: |
a5dfbb9d | 2996 | case LTTNG_LIST_TRACKER_PIDS: |
54d01ffb DG |
2997 | break; |
2998 | default: | |
2999 | /* Setup lttng message with no payload */ | |
3000 | ret = setup_lttng_msg(cmd_ctx, 0); | |
3001 | if (ret < 0) { | |
3002 | /* This label does not try to unlock the session */ | |
3003 | goto init_setup_error; | |
3004 | } | |
3005 | } | |
3006 | ||
3007 | /* Commands that DO NOT need a session. */ | |
3008 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 3009 | case LTTNG_CREATE_SESSION: |
27babd3a | 3010 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 3011 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 | 3012 | case LTTNG_CALIBRATE: |
54d01ffb DG |
3013 | case LTTNG_LIST_SESSIONS: |
3014 | case LTTNG_LIST_TRACEPOINTS: | |
834978fd | 3015 | case LTTNG_LIST_SYSCALLS: |
f37d259d | 3016 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
fb198a11 | 3017 | case LTTNG_SAVE_SESSION: |
44d3bd01 | 3018 | need_tracing_session = 0; |
54d01ffb DG |
3019 | break; |
3020 | default: | |
3021 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
3022 | /* |
3023 | * We keep the session list lock across _all_ commands | |
3024 | * for now, because the per-session lock does not | |
3025 | * handle teardown properly. | |
3026 | */ | |
74babd95 | 3027 | session_lock_list(); |
54d01ffb DG |
3028 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
3029 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 3030 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
3031 | goto error; |
3032 | } else { | |
3033 | /* Acquire lock for the session */ | |
3034 | session_lock(cmd_ctx->session); | |
3035 | } | |
3036 | break; | |
3037 | } | |
b389abbe | 3038 | |
5f3ecf22 DG |
3039 | /* |
3040 | * Commands that need a valid session but should NOT create one if none | |
3041 | * exists. Instead of creating one and destroying it when the command is | |
3042 | * handled, process that right before so we save some round trip in useless | |
3043 | * code path. | |
3044 | */ | |
3045 | switch (cmd_ctx->lsm->cmd_type) { | |
3046 | case LTTNG_DISABLE_CHANNEL: | |
3047 | case LTTNG_DISABLE_EVENT: | |
5f3ecf22 DG |
3048 | switch (cmd_ctx->lsm->domain.type) { |
3049 | case LTTNG_DOMAIN_KERNEL: | |
3050 | if (!cmd_ctx->session->kernel_session) { | |
3051 | ret = LTTNG_ERR_NO_CHANNEL; | |
3052 | goto error; | |
3053 | } | |
3054 | break; | |
3055 | case LTTNG_DOMAIN_JUL: | |
5cdb6027 | 3056 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3057 | case LTTNG_DOMAIN_PYTHON: |
5f3ecf22 DG |
3058 | case LTTNG_DOMAIN_UST: |
3059 | if (!cmd_ctx->session->ust_session) { | |
3060 | ret = LTTNG_ERR_NO_CHANNEL; | |
3061 | goto error; | |
3062 | } | |
3063 | break; | |
3064 | default: | |
3065 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3066 | goto error; | |
3067 | } | |
3068 | default: | |
3069 | break; | |
3070 | } | |
3071 | ||
2e09ba09 MD |
3072 | if (!need_domain) { |
3073 | goto skip_domain; | |
3074 | } | |
a4b92340 | 3075 | |
54d01ffb DG |
3076 | /* |
3077 | * Check domain type for specific "pre-action". | |
3078 | */ | |
3079 | switch (cmd_ctx->lsm->domain.type) { | |
3080 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 3081 | if (!is_root) { |
f73fabfd | 3082 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
3083 | goto error; |
3084 | } | |
3085 | ||
54d01ffb | 3086 | /* Kernel tracer check */ |
a4b35e07 | 3087 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3088 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3089 | ret = init_kernel_tracer(); |
3090 | if (ret != 0) { | |
54d01ffb DG |
3091 | goto error; |
3092 | } | |
3093 | } | |
5eb91c98 | 3094 | |
5c827ce0 DG |
3095 | /* Consumer is in an ERROR state. Report back to client */ |
3096 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3097 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3098 | goto error; |
3099 | } | |
3100 | ||
54d01ffb | 3101 | /* Need a session for kernel command */ |
44d3bd01 | 3102 | if (need_tracing_session) { |
54d01ffb | 3103 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3104 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3105 | if (ret < 0) { |
f73fabfd | 3106 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
3107 | goto error; |
3108 | } | |
b389abbe | 3109 | } |
7d29a247 | 3110 | |
54d01ffb | 3111 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3112 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3113 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 3114 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3115 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3116 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3117 | if (ret < 0) { |
f73fabfd | 3118 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 3119 | goto error; |
950131af | 3120 | } |
5c827ce0 | 3121 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
3122 | } else { |
3123 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3124 | } |
173af62f | 3125 | |
a4b92340 DG |
3126 | /* |
3127 | * The consumer was just spawned so we need to add the socket to | |
3128 | * the consumer output of the session if exist. | |
3129 | */ | |
3130 | ret = consumer_create_socket(&kconsumer_data, | |
3131 | cmd_ctx->session->kernel_session->consumer); | |
3132 | if (ret < 0) { | |
3133 | goto error; | |
173af62f | 3134 | } |
0d0c377a | 3135 | } |
5c827ce0 | 3136 | |
54d01ffb | 3137 | break; |
b9dfb167 | 3138 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3139 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3140 | case LTTNG_DOMAIN_PYTHON: |
2bdd86d4 | 3141 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3142 | { |
b51ec5b4 MD |
3143 | if (!ust_app_supported()) { |
3144 | ret = LTTNG_ERR_NO_UST; | |
3145 | goto error; | |
3146 | } | |
5c827ce0 DG |
3147 | /* Consumer is in an ERROR state. Report back to client */ |
3148 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3149 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3150 | goto error; |
3151 | } | |
3152 | ||
44d3bd01 | 3153 | if (need_tracing_session) { |
a4b92340 | 3154 | /* Create UST session if none exist. */ |
f6a9efaa | 3155 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3156 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3157 | &cmd_ctx->lsm->domain); |
f73fabfd | 3158 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
3159 | goto error; |
3160 | } | |
3161 | } | |
00e2e675 | 3162 | |
7753dea8 MD |
3163 | /* Start the UST consumer daemons */ |
3164 | /* 64-bit */ | |
3165 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 3166 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 3167 | ustconsumer64_data.pid == 0 && |
785d2d0d | 3168 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3169 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3170 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3171 | if (ret < 0) { |
f73fabfd | 3172 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 3173 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
3174 | goto error; |
3175 | } | |
48842b30 | 3176 | |
173af62f | 3177 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 3178 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3179 | } else { |
7753dea8 MD |
3180 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3181 | } | |
173af62f DG |
3182 | |
3183 | /* | |
3184 | * Setup socket for consumer 64 bit. No need for atomic access | |
3185 | * since it was set above and can ONLY be set in this thread. | |
3186 | */ | |
a4b92340 DG |
3187 | ret = consumer_create_socket(&ustconsumer64_data, |
3188 | cmd_ctx->session->ust_session->consumer); | |
3189 | if (ret < 0) { | |
3190 | goto error; | |
173af62f DG |
3191 | } |
3192 | ||
7753dea8 | 3193 | /* 32-bit */ |
385b881b | 3194 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); |
fc7a59ce | 3195 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 3196 | ustconsumer32_data.pid == 0 && |
785d2d0d | 3197 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3198 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
3199 | ret = start_consumerd(&ustconsumer32_data); | |
3200 | if (ret < 0) { | |
f73fabfd | 3201 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 3202 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
3203 | goto error; |
3204 | } | |
5c827ce0 | 3205 | |
173af62f | 3206 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 3207 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3208 | } else { |
3209 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3210 | } |
173af62f DG |
3211 | |
3212 | /* | |
3213 | * Setup socket for consumer 64 bit. No need for atomic access | |
3214 | * since it was set above and can ONLY be set in this thread. | |
3215 | */ | |
a4b92340 DG |
3216 | ret = consumer_create_socket(&ustconsumer32_data, |
3217 | cmd_ctx->session->ust_session->consumer); | |
3218 | if (ret < 0) { | |
3219 | goto error; | |
173af62f | 3220 | } |
44d3bd01 DG |
3221 | } |
3222 | break; | |
48842b30 | 3223 | } |
54d01ffb | 3224 | default: |
54d01ffb DG |
3225 | break; |
3226 | } | |
2e09ba09 | 3227 | skip_domain: |
33a2b854 | 3228 | |
5c827ce0 DG |
3229 | /* Validate consumer daemon state when start/stop trace command */ |
3230 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3231 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3232 | switch (cmd_ctx->lsm->domain.type) { | |
b9dfb167 | 3233 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3234 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3235 | case LTTNG_DOMAIN_PYTHON: |
5c827ce0 DG |
3236 | case LTTNG_DOMAIN_UST: |
3237 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3238 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3239 | goto error; |
3240 | } | |
3241 | break; | |
3242 | case LTTNG_DOMAIN_KERNEL: | |
3243 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3244 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3245 | goto error; |
3246 | } | |
3247 | break; | |
3248 | } | |
3249 | } | |
3250 | ||
8e0af1b4 MD |
3251 | /* |
3252 | * Check that the UID or GID match that of the tracing session. | |
3253 | * The root user can interact with all sessions. | |
3254 | */ | |
3255 | if (need_tracing_session) { | |
3256 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3257 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3258 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 3259 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
3260 | goto error; |
3261 | } | |
3262 | } | |
3263 | ||
ffe60014 DG |
3264 | /* |
3265 | * Send relayd information to consumer as soon as we have a domain and a | |
3266 | * session defined. | |
3267 | */ | |
3268 | if (cmd_ctx->session && need_domain) { | |
3269 | /* | |
3270 | * Setup relayd if not done yet. If the relayd information was already | |
3271 | * sent to the consumer, this call will gracefully return. | |
3272 | */ | |
3273 | ret = cmd_setup_relayd(cmd_ctx->session); | |
3274 | if (ret != LTTNG_OK) { | |
3275 | goto error; | |
3276 | } | |
3277 | } | |
3278 | ||
54d01ffb DG |
3279 | /* Process by command type */ |
3280 | switch (cmd_ctx->lsm->cmd_type) { | |
3281 | case LTTNG_ADD_CONTEXT: | |
3282 | { | |
3283 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3284 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 3285 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
3286 | break; |
3287 | } | |
3288 | case LTTNG_DISABLE_CHANNEL: | |
3289 | { | |
3290 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3291 | cmd_ctx->lsm->u.disable.channel_name); | |
3292 | break; | |
3293 | } | |
3294 | case LTTNG_DISABLE_EVENT: | |
3295 | { | |
47b7e2f9 JG |
3296 | |
3297 | /* | |
3298 | * FIXME: handle filter; for now we just receive the filter's | |
3299 | * bytecode along with the filter expression which are sent by | |
3300 | * liblttng-ctl and discard them. | |
3301 | * | |
3302 | * This fixes an issue where the client may block while sending | |
3303 | * the filter payload and encounter an error because the session | |
3304 | * daemon closes the socket without ever handling this data. | |
3305 | */ | |
3306 | size_t count = cmd_ctx->lsm->u.disable.expression_len + | |
3307 | cmd_ctx->lsm->u.disable.bytecode_len; | |
3308 | ||
3309 | if (count) { | |
3310 | char data[LTTNG_FILTER_MAX_LEN]; | |
3311 | ||
3312 | DBG("Discarding disable event command payload of size %zu", count); | |
3313 | while (count) { | |
3314 | ret = lttcomm_recv_unix_sock(sock, data, | |
3315 | count > sizeof(data) ? sizeof(data) : count); | |
3316 | if (ret < 0) { | |
3317 | goto error; | |
3318 | } | |
3319 | ||
3320 | count -= (size_t) ret; | |
3321 | } | |
3322 | } | |
6e911cad | 3323 | /* FIXME: passing packed structure to non-packed pointer */ |
54d01ffb DG |
3324 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3325 | cmd_ctx->lsm->u.disable.channel_name, | |
6e911cad | 3326 | &cmd_ctx->lsm->u.disable.event); |
33a2b854 DG |
3327 | break; |
3328 | } | |
54d01ffb DG |
3329 | case LTTNG_ENABLE_CHANNEL: |
3330 | { | |
7972aab2 | 3331 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 3332 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
3333 | break; |
3334 | } | |
ccf10263 MD |
3335 | case LTTNG_TRACK_PID: |
3336 | { | |
3337 | ret = cmd_track_pid(cmd_ctx->session, | |
3338 | cmd_ctx->lsm->domain.type, | |
3339 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3340 | break; | |
3341 | } | |
3342 | case LTTNG_UNTRACK_PID: | |
3343 | { | |
3344 | ret = cmd_untrack_pid(cmd_ctx->session, | |
3345 | cmd_ctx->lsm->domain.type, | |
3346 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3347 | break; | |
3348 | } | |
54d01ffb DG |
3349 | case LTTNG_ENABLE_EVENT: |
3350 | { | |
882ef835 JI |
3351 | struct lttng_event_exclusion *exclusion = NULL; |
3352 | struct lttng_filter_bytecode *bytecode = NULL; | |
6b453b5e | 3353 | char *filter_expression = NULL; |
882ef835 | 3354 | |
67676bd8 DG |
3355 | /* Handle exclusion events and receive it from the client. */ |
3356 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3357 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3358 | ||
3359 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3360 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3361 | if (!exclusion) { | |
3362 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3363 | goto error; | |
882ef835 | 3364 | } |
882ef835 | 3365 | |
67676bd8 DG |
3366 | DBG("Receiving var len exclusion event list from client ..."); |
3367 | exclusion->count = count; | |
3368 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3369 | count * LTTNG_SYMBOL_NAME_LEN); | |
3370 | if (ret <= 0) { | |
3371 | DBG("Nothing recv() from client var len data... continuing"); | |
3372 | *sock_error = 1; | |
3373 | free(exclusion); | |
3374 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3375 | goto error; | |
3376 | } | |
3377 | } | |
3378 | ||
6b453b5e JG |
3379 | /* Get filter expression from client. */ |
3380 | if (cmd_ctx->lsm->u.enable.expression_len > 0) { | |
3381 | size_t expression_len = | |
3382 | cmd_ctx->lsm->u.enable.expression_len; | |
3383 | ||
3384 | if (expression_len > LTTNG_FILTER_MAX_LEN) { | |
3385 | ret = LTTNG_ERR_FILTER_INVAL; | |
3386 | free(exclusion); | |
3387 | goto error; | |
3388 | } | |
3389 | ||
3390 | filter_expression = zmalloc(expression_len); | |
3391 | if (!filter_expression) { | |
3392 | free(exclusion); | |
3393 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3394 | goto error; | |
3395 | } | |
3396 | ||
3397 | /* Receive var. len. data */ | |
3398 | DBG("Receiving var len filter's expression from client ..."); | |
3399 | ret = lttcomm_recv_unix_sock(sock, filter_expression, | |
3400 | expression_len); | |
3401 | if (ret <= 0) { | |
3402 | DBG("Nothing recv() from client car len data... continuing"); | |
3403 | *sock_error = 1; | |
3404 | free(filter_expression); | |
3405 | free(exclusion); | |
3406 | ret = LTTNG_ERR_FILTER_INVAL; | |
3407 | goto error; | |
3408 | } | |
3409 | } | |
3410 | ||
67676bd8 DG |
3411 | /* Handle filter and get bytecode from client. */ |
3412 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3413 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3414 | ||
3415 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3416 | ret = LTTNG_ERR_FILTER_INVAL; | |
49d21f93 | 3417 | free(filter_expression); |
67676bd8 DG |
3418 | free(exclusion); |
3419 | goto error; | |
3420 | } | |
3421 | ||
3422 | bytecode = zmalloc(bytecode_len); | |
3423 | if (!bytecode) { | |
49d21f93 | 3424 | free(filter_expression); |
67676bd8 DG |
3425 | free(exclusion); |
3426 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3427 | goto error; | |
882ef835 JI |
3428 | } |
3429 | ||
67676bd8 DG |
3430 | /* Receive var. len. data */ |
3431 | DBG("Receiving var len filter's bytecode from client ..."); | |
3432 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3433 | if (ret <= 0) { | |
3434 | DBG("Nothing recv() from client car len data... continuing"); | |
3435 | *sock_error = 1; | |
49d21f93 | 3436 | free(filter_expression); |
67676bd8 DG |
3437 | free(bytecode); |
3438 | free(exclusion); | |
3439 | ret = LTTNG_ERR_FILTER_INVAL; | |
3440 | goto error; | |
3441 | } | |
3442 | ||
3443 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
49d21f93 | 3444 | free(filter_expression); |
67676bd8 DG |
3445 | free(bytecode); |
3446 | free(exclusion); | |
3447 | ret = LTTNG_ERR_FILTER_INVAL; | |
3448 | goto error; | |
3449 | } | |
882ef835 | 3450 | } |
67676bd8 DG |
3451 | |
3452 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3453 | cmd_ctx->lsm->u.enable.channel_name, | |
6b453b5e JG |
3454 | &cmd_ctx->lsm->u.enable.event, |
3455 | filter_expression, bytecode, exclusion, | |
67676bd8 | 3456 | kernel_poll_pipe[1]); |
54d01ffb DG |
3457 | break; |
3458 | } | |
052da939 | 3459 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3460 | { |
9f19cc17 | 3461 | struct lttng_event *events; |
54d01ffb | 3462 | ssize_t nb_events; |
052da939 | 3463 | |
0845bbfa | 3464 | session_lock_list(); |
54d01ffb | 3465 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
0845bbfa | 3466 | session_unlock_list(); |
54d01ffb | 3467 | if (nb_events < 0) { |
f73fabfd | 3468 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3469 | ret = -nb_events; |
3470 | goto error; | |
2ef84c95 DG |
3471 | } |
3472 | ||
3473 | /* | |
3474 | * Setup lttng message with payload size set to the event list size in | |
3475 | * bytes and then copy list into the llm payload. | |
3476 | */ | |
052da939 | 3477 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3478 | if (ret < 0) { |
052da939 | 3479 | free(events); |
2ef84c95 DG |
3480 | goto setup_error; |
3481 | } | |
3482 | ||
3483 | /* Copy event list into message payload */ | |
9f19cc17 | 3484 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3485 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3486 | |
9f19cc17 | 3487 | free(events); |
2ef84c95 | 3488 | |
f73fabfd | 3489 | ret = LTTNG_OK; |
2ef84c95 DG |
3490 | break; |
3491 | } | |
f37d259d MD |
3492 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3493 | { | |
3494 | struct lttng_event_field *fields; | |
3495 | ssize_t nb_fields; | |
3496 | ||
0845bbfa | 3497 | session_lock_list(); |
a4b92340 DG |
3498 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3499 | &fields); | |
0845bbfa | 3500 | session_unlock_list(); |
f37d259d | 3501 | if (nb_fields < 0) { |
f73fabfd | 3502 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3503 | ret = -nb_fields; |
3504 | goto error; | |
3505 | } | |
3506 | ||
3507 | /* | |
3508 | * Setup lttng message with payload size set to the event list size in | |
3509 | * bytes and then copy list into the llm payload. | |
3510 | */ | |
a4b92340 DG |
3511 | ret = setup_lttng_msg(cmd_ctx, |
3512 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
3513 | if (ret < 0) { |
3514 | free(fields); | |
3515 | goto setup_error; | |
3516 | } | |
3517 | ||
3518 | /* Copy event list into message payload */ | |
3519 | memcpy(cmd_ctx->llm->payload, fields, | |
3520 | sizeof(struct lttng_event_field) * nb_fields); | |
3521 | ||
3522 | free(fields); | |
3523 | ||
f73fabfd | 3524 | ret = LTTNG_OK; |
f37d259d MD |
3525 | break; |
3526 | } | |
834978fd DG |
3527 | case LTTNG_LIST_SYSCALLS: |
3528 | { | |
3529 | struct lttng_event *events; | |
3530 | ssize_t nb_events; | |
3531 | ||
3532 | nb_events = cmd_list_syscalls(&events); | |
3533 | if (nb_events < 0) { | |
3534 | /* Return value is a negative lttng_error_code. */ | |
3535 | ret = -nb_events; | |
3536 | goto error; | |
3537 | } | |
3538 | ||
3539 | /* | |
3540 | * Setup lttng message with payload size set to the event list size in | |
3541 | * bytes and then copy list into the llm payload. | |
3542 | */ | |
3543 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); | |
3544 | if (ret < 0) { | |
3545 | free(events); | |
3546 | goto setup_error; | |
3547 | } | |
3548 | ||
3549 | /* Copy event list into message payload */ | |
3550 | memcpy(cmd_ctx->llm->payload, events, | |
3551 | sizeof(struct lttng_event) * nb_events); | |
3552 | ||
3553 | free(events); | |
3554 | ||
3555 | ret = LTTNG_OK; | |
3556 | break; | |
3557 | } | |
a5dfbb9d MD |
3558 | case LTTNG_LIST_TRACKER_PIDS: |
3559 | { | |
3560 | int32_t *pids = NULL; | |
3561 | ssize_t nr_pids; | |
3562 | ||
3563 | nr_pids = cmd_list_tracker_pids(cmd_ctx->session, | |
3564 | cmd_ctx->lsm->domain.type, &pids); | |
3565 | if (nr_pids < 0) { | |
3566 | /* Return value is a negative lttng_error_code. */ | |
3567 | ret = -nr_pids; | |
3568 | goto error; | |
3569 | } | |
3570 | ||
3571 | /* | |
3572 | * Setup lttng message with payload size set to the event list size in | |
3573 | * bytes and then copy list into the llm payload. | |
3574 | */ | |
3575 | ret = setup_lttng_msg(cmd_ctx, sizeof(int32_t) * nr_pids); | |
3576 | if (ret < 0) { | |
3577 | free(pids); | |
3578 | goto setup_error; | |
3579 | } | |
3580 | ||
3581 | /* Copy event list into message payload */ | |
3582 | memcpy(cmd_ctx->llm->payload, pids, | |
3583 | sizeof(int) * nr_pids); | |
3584 | ||
3585 | free(pids); | |
3586 | ||
3587 | ret = LTTNG_OK; | |
3588 | break; | |
3589 | } | |
00e2e675 DG |
3590 | case LTTNG_SET_CONSUMER_URI: |
3591 | { | |
a4b92340 DG |
3592 | size_t nb_uri, len; |
3593 | struct lttng_uri *uris; | |
3594 | ||
3595 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3596 | len = nb_uri * sizeof(struct lttng_uri); | |
3597 | ||
3598 | if (nb_uri == 0) { | |
f73fabfd | 3599 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3600 | goto error; |
3601 | } | |
3602 | ||
3603 | uris = zmalloc(len); | |
3604 | if (uris == NULL) { | |
f73fabfd | 3605 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3606 | goto error; |
3607 | } | |
3608 | ||
3609 | /* Receive variable len data */ | |
77c7c900 | 3610 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3611 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3612 | if (ret <= 0) { | |
3613 | DBG("No URIs received from client... continuing"); | |
3614 | *sock_error = 1; | |
f73fabfd | 3615 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3616 | free(uris); |
a4b92340 DG |
3617 | goto error; |
3618 | } | |
3619 | ||
bda32d56 JG |
3620 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); |
3621 | free(uris); | |
f73fabfd | 3622 | if (ret != LTTNG_OK) { |
a4b92340 DG |
3623 | goto error; |
3624 | } | |
3625 | ||
b1d41407 | 3626 | |
00e2e675 DG |
3627 | break; |
3628 | } | |
f3ed775e | 3629 | case LTTNG_START_TRACE: |
8c0faa1d | 3630 | { |
54d01ffb | 3631 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3632 | break; |
3633 | } | |
f3ed775e | 3634 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3635 | { |
54d01ffb | 3636 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3637 | break; |
3638 | } | |
5e16da05 MD |
3639 | case LTTNG_CREATE_SESSION: |
3640 | { | |
a4b92340 DG |
3641 | size_t nb_uri, len; |
3642 | struct lttng_uri *uris = NULL; | |
3643 | ||
3644 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3645 | len = nb_uri * sizeof(struct lttng_uri); | |
3646 | ||
3647 | if (nb_uri > 0) { | |
3648 | uris = zmalloc(len); | |
3649 | if (uris == NULL) { | |
f73fabfd | 3650 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3651 | goto error; |
3652 | } | |
3653 | ||
3654 | /* Receive variable len data */ | |
77c7c900 | 3655 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3656 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3657 | if (ret <= 0) { | |
3658 | DBG("No URIs received from client... continuing"); | |
3659 | *sock_error = 1; | |
f73fabfd | 3660 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3661 | free(uris); |
a4b92340 DG |
3662 | goto error; |
3663 | } | |
3664 | ||
3665 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3666 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3667 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3668 | free(uris); |
a4b92340 DG |
3669 | goto error; |
3670 | } | |
3671 | } | |
3672 | ||
3673 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3674 | &cmd_ctx->creds, 0); |
a4b92340 | 3675 | |
b1d41407 DG |
3676 | free(uris); |
3677 | ||
00e2e675 DG |
3678 | break; |
3679 | } | |
5e16da05 MD |
3680 | case LTTNG_DESTROY_SESSION: |
3681 | { | |
2f77fc4b | 3682 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3683 | |
3684 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3685 | cmd_ctx->session = NULL; |
5461b305 | 3686 | break; |
5e16da05 | 3687 | } |
9f19cc17 | 3688 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3689 | { |
54d01ffb | 3690 | ssize_t nb_dom; |
fa64dfb4 | 3691 | struct lttng_domain *domains = NULL; |
5461b305 | 3692 | |
54d01ffb DG |
3693 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3694 | if (nb_dom < 0) { | |
f73fabfd | 3695 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3696 | ret = -nb_dom; |
3697 | goto error; | |
ce3d728c | 3698 | } |
520ff687 | 3699 | |
54d01ffb | 3700 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 | 3701 | if (ret < 0) { |
ae9c20bc | 3702 | free(domains); |
5461b305 | 3703 | goto setup_error; |
520ff687 | 3704 | } |
57167058 | 3705 | |
54d01ffb DG |
3706 | /* Copy event list into message payload */ |
3707 | memcpy(cmd_ctx->llm->payload, domains, | |
3708 | nb_dom * sizeof(struct lttng_domain)); | |
3709 | ||
3710 | free(domains); | |
5e16da05 | 3711 | |
f73fabfd | 3712 | ret = LTTNG_OK; |
5e16da05 MD |
3713 | break; |
3714 | } | |
9f19cc17 | 3715 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3716 | { |
6775595e | 3717 | int nb_chan; |
ade7ce52 | 3718 | struct lttng_channel *channels = NULL; |
54d01ffb | 3719 | |
b551a063 DG |
3720 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3721 | cmd_ctx->session, &channels); | |
54d01ffb | 3722 | if (nb_chan < 0) { |
f73fabfd | 3723 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3724 | ret = -nb_chan; |
3725 | goto error; | |
5461b305 | 3726 | } |
ca95a216 | 3727 | |
54d01ffb | 3728 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 | 3729 | if (ret < 0) { |
ae9c20bc | 3730 | free(channels); |
5461b305 DG |
3731 | goto setup_error; |
3732 | } | |
9f19cc17 | 3733 | |
54d01ffb DG |
3734 | /* Copy event list into message payload */ |
3735 | memcpy(cmd_ctx->llm->payload, channels, | |
3736 | nb_chan * sizeof(struct lttng_channel)); | |
3737 | ||
3738 | free(channels); | |
9f19cc17 | 3739 | |
f73fabfd | 3740 | ret = LTTNG_OK; |
5461b305 | 3741 | break; |
5e16da05 | 3742 | } |
9f19cc17 | 3743 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3744 | { |
b551a063 | 3745 | ssize_t nb_event; |
684d34d2 | 3746 | struct lttng_event *events = NULL; |
9f19cc17 | 3747 | |
b551a063 | 3748 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3749 | cmd_ctx->lsm->u.list.channel_name, &events); |
3750 | if (nb_event < 0) { | |
f73fabfd | 3751 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3752 | ret = -nb_event; |
3753 | goto error; | |
5461b305 | 3754 | } |
ca95a216 | 3755 | |
54d01ffb | 3756 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 | 3757 | if (ret < 0) { |
ae9c20bc | 3758 | free(events); |
5461b305 DG |
3759 | goto setup_error; |
3760 | } | |
9f19cc17 | 3761 | |
54d01ffb DG |
3762 | /* Copy event list into message payload */ |
3763 | memcpy(cmd_ctx->llm->payload, events, | |
3764 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3765 | |
54d01ffb | 3766 | free(events); |
9f19cc17 | 3767 | |
f73fabfd | 3768 | ret = LTTNG_OK; |
5461b305 | 3769 | break; |
5e16da05 MD |
3770 | } |
3771 | case LTTNG_LIST_SESSIONS: | |
3772 | { | |
8e0af1b4 | 3773 | unsigned int nr_sessions; |
5461b305 | 3774 | |
8e0af1b4 | 3775 | session_lock_list(); |
730389d9 DG |
3776 | nr_sessions = lttng_sessions_count( |
3777 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3778 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3779 | |
8e0af1b4 | 3780 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3781 | if (ret < 0) { |
54d01ffb | 3782 | session_unlock_list(); |
5461b305 | 3783 | goto setup_error; |
e065084a | 3784 | } |
5e16da05 | 3785 | |
6c9cc2ab | 3786 | /* Filled the session array */ |
2f77fc4b | 3787 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3788 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3789 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3790 | |
54d01ffb | 3791 | session_unlock_list(); |
5e16da05 | 3792 | |
f73fabfd | 3793 | ret = LTTNG_OK; |
5e16da05 MD |
3794 | break; |
3795 | } | |
d0254c7c MD |
3796 | case LTTNG_CALIBRATE: |
3797 | { | |
54d01ffb DG |
3798 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3799 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3800 | break; |
3801 | } | |
d9800920 DG |
3802 | case LTTNG_REGISTER_CONSUMER: |
3803 | { | |
2f77fc4b DG |
3804 | struct consumer_data *cdata; |
3805 | ||
3806 | switch (cmd_ctx->lsm->domain.type) { | |
3807 | case LTTNG_DOMAIN_KERNEL: | |
3808 | cdata = &kconsumer_data; | |
3809 | break; | |
3810 | default: | |
f73fabfd | 3811 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3812 | goto error; |
3813 | } | |
3814 | ||
54d01ffb | 3815 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3816 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3817 | break; |
3818 | } | |
6d805429 | 3819 | case LTTNG_DATA_PENDING: |
806e2684 | 3820 | { |
f6151c55 JG |
3821 | int pending_ret; |
3822 | ||
3823 | /* 1 byte to return whether or not data is pending */ | |
3824 | ret = setup_lttng_msg(cmd_ctx, 1); | |
3825 | if (ret < 0) { | |
3826 | goto setup_error; | |
3827 | } | |
3828 | ||
3829 | pending_ret = cmd_data_pending(cmd_ctx->session); | |
3830 | /* | |
3831 | * FIXME | |
3832 | * | |
3833 | * This function may returns 0 or 1 to indicate whether or not | |
3834 | * there is data pending. In case of error, it should return an | |
3835 | * LTTNG_ERR code. However, some code paths may still return | |
3836 | * a nondescript error code, which we handle by returning an | |
3837 | * "unknown" error. | |
3838 | */ | |
3839 | if (pending_ret == 0 || pending_ret == 1) { | |
3840 | ret = LTTNG_OK; | |
3841 | } else if (pending_ret < 0) { | |
3842 | ret = LTTNG_ERR_UNK; | |
3843 | goto setup_error; | |
3844 | } else { | |
3845 | ret = pending_ret; | |
3846 | goto setup_error; | |
3847 | } | |
3848 | ||
3849 | *cmd_ctx->llm->payload = (uint8_t) pending_ret; | |
806e2684 DG |
3850 | break; |
3851 | } | |
da3c9ec1 DG |
3852 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3853 | { | |
6dc3064a DG |
3854 | struct lttcomm_lttng_output_id reply; |
3855 | ||
3856 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3857 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3858 | if (ret != LTTNG_OK) { | |
3859 | goto error; | |
3860 | } | |
3861 | ||
3862 | ret = setup_lttng_msg(cmd_ctx, sizeof(reply)); | |
3863 | if (ret < 0) { | |
3864 | goto setup_error; | |
3865 | } | |
3866 | ||
3867 | /* Copy output list into message payload */ | |
3868 | memcpy(cmd_ctx->llm->payload, &reply, sizeof(reply)); | |
3869 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3870 | break; |
3871 | } | |
3872 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3873 | { | |
6dc3064a DG |
3874 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3875 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3876 | break; |
3877 | } | |
3878 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3879 | { | |
6dc3064a DG |
3880 | ssize_t nb_output; |
3881 | struct lttng_snapshot_output *outputs = NULL; | |
3882 | ||
3883 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
3884 | if (nb_output < 0) { | |
3885 | ret = -nb_output; | |
3886 | goto error; | |
3887 | } | |
3888 | ||
3889 | ret = setup_lttng_msg(cmd_ctx, | |
3890 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3891 | if (ret < 0) { | |
3892 | free(outputs); | |
3893 | goto setup_error; | |
3894 | } | |
3895 | ||
3896 | if (outputs) { | |
3897 | /* Copy output list into message payload */ | |
3898 | memcpy(cmd_ctx->llm->payload, outputs, | |
3899 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3900 | free(outputs); | |
3901 | } | |
3902 | ||
3903 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3904 | break; |
3905 | } | |
3906 | case LTTNG_SNAPSHOT_RECORD: | |
3907 | { | |
6dc3064a DG |
3908 | ret = cmd_snapshot_record(cmd_ctx->session, |
3909 | &cmd_ctx->lsm->u.snapshot_record.output, | |
3910 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
3911 | break; |
3912 | } | |
27babd3a DG |
3913 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
3914 | { | |
3915 | size_t nb_uri, len; | |
3916 | struct lttng_uri *uris = NULL; | |
3917 | ||
3918 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3919 | len = nb_uri * sizeof(struct lttng_uri); | |
3920 | ||
3921 | if (nb_uri > 0) { | |
3922 | uris = zmalloc(len); | |
3923 | if (uris == NULL) { | |
3924 | ret = LTTNG_ERR_FATAL; | |
3925 | goto error; | |
3926 | } | |
3927 | ||
3928 | /* Receive variable len data */ | |
3929 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3930 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3931 | if (ret <= 0) { | |
3932 | DBG("No URIs received from client... continuing"); | |
3933 | *sock_error = 1; | |
3934 | ret = LTTNG_ERR_SESSION_FAIL; | |
3935 | free(uris); | |
3936 | goto error; | |
3937 | } | |
3938 | ||
3939 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3940 | DBG("Creating session with ONE network URI is a bad call"); | |
3941 | ret = LTTNG_ERR_SESSION_FAIL; | |
3942 | free(uris); | |
3943 | goto error; | |
3944 | } | |
3945 | } | |
3946 | ||
3947 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
3948 | nb_uri, &cmd_ctx->creds); | |
3949 | free(uris); | |
3950 | break; | |
3951 | } | |
ecc48a90 JD |
3952 | case LTTNG_CREATE_SESSION_LIVE: |
3953 | { | |
3954 | size_t nb_uri, len; | |
3955 | struct lttng_uri *uris = NULL; | |
3956 | ||
3957 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3958 | len = nb_uri * sizeof(struct lttng_uri); | |
3959 | ||
3960 | if (nb_uri > 0) { | |
3961 | uris = zmalloc(len); | |
3962 | if (uris == NULL) { | |
3963 | ret = LTTNG_ERR_FATAL; | |
3964 | goto error; | |
3965 | } | |
3966 | ||
3967 | /* Receive variable len data */ | |
3968 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3969 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3970 | if (ret <= 0) { | |
3971 | DBG("No URIs received from client... continuing"); | |
3972 | *sock_error = 1; | |
3973 | ret = LTTNG_ERR_SESSION_FAIL; | |
3974 | free(uris); | |
3975 | goto error; | |
3976 | } | |
3977 | ||
3978 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3979 | DBG("Creating session with ONE network URI is a bad call"); | |
3980 | ret = LTTNG_ERR_SESSION_FAIL; | |
3981 | free(uris); | |
3982 | goto error; | |
3983 | } | |
3984 | } | |
3985 | ||
3986 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
3987 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
3988 | free(uris); | |
3989 | break; | |
3990 | } | |
fb198a11 JG |
3991 | case LTTNG_SAVE_SESSION: |
3992 | { | |
3993 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
3994 | &cmd_ctx->creds); | |
3995 | break; | |
3996 | } | |
d7ba1388 MD |
3997 | case LTTNG_SET_SESSION_SHM_PATH: |
3998 | { | |
3999 | ret = cmd_set_session_shm_path(cmd_ctx->session, | |
4000 | cmd_ctx->lsm->u.set_shm_path.shm_path); | |
4001 | break; | |
4002 | } | |
5e16da05 | 4003 | default: |
f73fabfd | 4004 | ret = LTTNG_ERR_UND; |
5461b305 | 4005 | break; |
fac6795d DG |
4006 | } |
4007 | ||
5461b305 | 4008 | error: |
5461b305 DG |
4009 | if (cmd_ctx->llm == NULL) { |
4010 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 4011 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
4012 | goto setup_error; |
4013 | } | |
4014 | } | |
54d01ffb | 4015 | /* Set return code */ |
5461b305 | 4016 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 4017 | setup_error: |
b5541356 | 4018 | if (cmd_ctx->session) { |
54d01ffb | 4019 | session_unlock(cmd_ctx->session); |
b5541356 | 4020 | } |
256a5576 MD |
4021 | if (need_tracing_session) { |
4022 | session_unlock_list(); | |
4023 | } | |
54d01ffb | 4024 | init_setup_error: |
8028d920 | 4025 | return ret; |
fac6795d DG |
4026 | } |
4027 | ||
44a5e5eb DG |
4028 | /* |
4029 | * Thread managing health check socket. | |
4030 | */ | |
4031 | static void *thread_manage_health(void *data) | |
4032 | { | |
eb4a2943 | 4033 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
4034 | uint32_t revents, nb_fd; |
4035 | struct lttng_poll_event events; | |
0c89d795 MD |
4036 | struct health_comm_msg msg; |
4037 | struct health_comm_reply reply; | |
44a5e5eb DG |
4038 | |
4039 | DBG("[thread] Manage health check started"); | |
4040 | ||
4041 | rcu_register_thread(); | |
4042 | ||
6d737ce4 DG |
4043 | /* We might hit an error path before this is created. */ |
4044 | lttng_poll_init(&events); | |
3cc04881 | 4045 | |
44a5e5eb DG |
4046 | /* Create unix socket */ |
4047 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
4048 | if (sock < 0) { | |
4049 | ERR("Unable to create health check Unix socket"); | |
4050 | ret = -1; | |
4051 | goto error; | |
4052 | } | |
4053 | ||
6c71277b MD |
4054 | if (is_root) { |
4055 | /* lttng health client socket path permissions */ | |
4056 | ret = chown(health_unix_sock_path, 0, | |
4057 | utils_get_group_id(tracing_group_name)); | |
4058 | if (ret < 0) { | |
4059 | ERR("Unable to set group on %s", health_unix_sock_path); | |
4060 | PERROR("chown"); | |
4061 | ret = -1; | |
4062 | goto error; | |
4063 | } | |
4064 | ||
4065 | ret = chmod(health_unix_sock_path, | |
4066 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4067 | if (ret < 0) { | |
4068 | ERR("Unable to set permissions on %s", health_unix_sock_path); | |
4069 | PERROR("chmod"); | |
4070 | ret = -1; | |
4071 | goto error; | |
4072 | } | |
4073 | } | |
4074 | ||
b662582b DG |
4075 | /* |
4076 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4077 | * show must go on. | |
4078 | */ | |
4079 | (void) utils_set_fd_cloexec(sock); | |
4080 | ||
44a5e5eb DG |
4081 | ret = lttcomm_listen_unix_sock(sock); |
4082 | if (ret < 0) { | |
4083 | goto error; | |
4084 | } | |
4085 | ||
4086 | /* | |
4087 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4088 | * more will be added to this poll set. | |
4089 | */ | |
d0b96690 | 4090 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
4091 | if (ret < 0) { |
4092 | goto error; | |
4093 | } | |
4094 | ||
4095 | /* Add the application registration socket */ | |
4096 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
4097 | if (ret < 0) { | |
4098 | goto error; | |
4099 | } | |
4100 | ||
ef367a93 | 4101 | sessiond_notify_ready(); |
97bc1426 | 4102 | |
44a5e5eb DG |
4103 | while (1) { |
4104 | DBG("Health check ready"); | |
4105 | ||
44a5e5eb DG |
4106 | /* Inifinite blocking call, waiting for transmission */ |
4107 | restart: | |
4108 | ret = lttng_poll_wait(&events, -1); | |
4109 | if (ret < 0) { | |
4110 | /* | |
4111 | * Restart interrupted system call. | |
4112 | */ | |
4113 | if (errno == EINTR) { | |
4114 | goto restart; | |
4115 | } | |
4116 | goto error; | |
4117 | } | |
4118 | ||
0d9c5d77 DG |
4119 | nb_fd = ret; |
4120 | ||
44a5e5eb DG |
4121 | for (i = 0; i < nb_fd; i++) { |
4122 | /* Fetch once the poll data */ | |
4123 | revents = LTTNG_POLL_GETEV(&events, i); | |
4124 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4125 | ||
fd20dac9 MD |
4126 | if (!revents) { |
4127 | /* No activity for this FD (poll implementation). */ | |
4128 | continue; | |
4129 | } | |
4130 | ||
44a5e5eb | 4131 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4132 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 4133 | if (ret) { |
139ac872 MD |
4134 | err = 0; |
4135 | goto exit; | |
44a5e5eb DG |
4136 | } |
4137 | ||
4138 | /* Event on the registration socket */ | |
4139 | if (pollfd == sock) { | |
4140 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
4141 | ERR("Health socket poll error"); | |
4142 | goto error; | |
4143 | } | |
4144 | } | |
4145 | } | |
4146 | ||
4147 | new_sock = lttcomm_accept_unix_sock(sock); | |
4148 | if (new_sock < 0) { | |
4149 | goto error; | |
4150 | } | |
4151 | ||
b662582b DG |
4152 | /* |
4153 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4154 | * show must go on. | |
4155 | */ | |
4156 | (void) utils_set_fd_cloexec(new_sock); | |
4157 | ||
44a5e5eb DG |
4158 | DBG("Receiving data from client for health..."); |
4159 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
4160 | if (ret <= 0) { | |
4161 | DBG("Nothing recv() from client... continuing"); | |
4162 | ret = close(new_sock); | |
4163 | if (ret) { | |
4164 | PERROR("close"); | |
4165 | } | |
4166 | new_sock = -1; | |
4167 | continue; | |
4168 | } | |
4169 | ||
4170 | rcu_thread_online(); | |
4171 | ||
53efb85a | 4172 | memset(&reply, 0, sizeof(reply)); |
6c71277b MD |
4173 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { |
4174 | /* | |
4175 | * health_check_state returns 0 if health is | |
4176 | * bad. | |
4177 | */ | |
4178 | if (!health_check_state(health_sessiond, i)) { | |
4179 | reply.ret_code |= 1ULL << i; | |
4180 | } | |
44a5e5eb DG |
4181 | } |
4182 | ||
6c71277b | 4183 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
4184 | |
4185 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
4186 | if (ret < 0) { | |
4187 | ERR("Failed to send health data back to client"); | |
4188 | } | |
4189 | ||
4190 | /* End of transmission */ | |
4191 | ret = close(new_sock); | |
4192 | if (ret) { | |
4193 | PERROR("close"); | |
4194 | } | |
4195 | new_sock = -1; | |
4196 | } | |
4197 | ||
139ac872 | 4198 | exit: |
44a5e5eb | 4199 | error: |
139ac872 MD |
4200 | if (err) { |
4201 | ERR("Health error occurred in %s", __func__); | |
4202 | } | |
44a5e5eb DG |
4203 | DBG("Health check thread dying"); |
4204 | unlink(health_unix_sock_path); | |
4205 | if (sock >= 0) { | |
4206 | ret = close(sock); | |
4207 | if (ret) { | |
4208 | PERROR("close"); | |
4209 | } | |
4210 | } | |
44a5e5eb DG |
4211 | |
4212 | lttng_poll_clean(&events); | |
4213 | ||
4214 | rcu_unregister_thread(); | |
4215 | return NULL; | |
4216 | } | |
4217 | ||
1d4b027a | 4218 | /* |
d063d709 DG |
4219 | * This thread manage all clients request using the unix client socket for |
4220 | * communication. | |
1d4b027a DG |
4221 | */ |
4222 | static void *thread_manage_clients(void *data) | |
4223 | { | |
139ac872 | 4224 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 4225 | int sock_error; |
5eb91c98 | 4226 | uint32_t revents, nb_fd; |
273ea72c | 4227 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 4228 | struct lttng_poll_event events; |
1d4b027a DG |
4229 | |
4230 | DBG("[thread] Manage client started"); | |
4231 | ||
f6a9efaa DG |
4232 | rcu_register_thread(); |
4233 | ||
6c71277b | 4234 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 4235 | |
840cb59c | 4236 | health_code_update(); |
44a5e5eb | 4237 | |
1d4b027a DG |
4238 | ret = lttcomm_listen_unix_sock(client_sock); |
4239 | if (ret < 0) { | |
35df2755 | 4240 | goto error_listen; |
1d4b027a DG |
4241 | } |
4242 | ||
5eb91c98 DG |
4243 | /* |
4244 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4245 | * more will be added to this poll set. | |
4246 | */ | |
d0b96690 | 4247 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 4248 | if (ret < 0) { |
35df2755 | 4249 | goto error_create_poll; |
5eb91c98 | 4250 | } |
273ea72c | 4251 | |
5eb91c98 DG |
4252 | /* Add the application registration socket */ |
4253 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
4254 | if (ret < 0) { | |
4255 | goto error; | |
4256 | } | |
273ea72c | 4257 | |
ef367a93 JG |
4258 | sessiond_notify_ready(); |
4259 | ret = sem_post(&load_info->message_thread_ready); | |
4260 | if (ret) { | |
4261 | PERROR("sem_post message_thread_ready"); | |
4262 | goto error; | |
4263 | } | |
0bb7724a | 4264 | |
72453c8c MD |
4265 | /* This testpoint is after we signal readiness to the parent. */ |
4266 | if (testpoint(sessiond_thread_manage_clients)) { | |
4267 | goto error; | |
4268 | } | |
4269 | ||
e547b070 | 4270 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
4271 | goto error; |
4272 | } | |
8ac94142 | 4273 | |
840cb59c | 4274 | health_code_update(); |
44a5e5eb | 4275 | |
1d4b027a | 4276 | while (1) { |
1d4b027a | 4277 | DBG("Accepting client command ..."); |
273ea72c DG |
4278 | |
4279 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 4280 | restart: |
a78af745 | 4281 | health_poll_entry(); |
5eb91c98 | 4282 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 4283 | health_poll_exit(); |
273ea72c | 4284 | if (ret < 0) { |
88f2b785 MD |
4285 | /* |
4286 | * Restart interrupted system call. | |
4287 | */ | |
4288 | if (errno == EINTR) { | |
4289 | goto restart; | |
4290 | } | |
273ea72c DG |
4291 | goto error; |
4292 | } | |
4293 | ||
0d9c5d77 DG |
4294 | nb_fd = ret; |
4295 | ||
5eb91c98 DG |
4296 | for (i = 0; i < nb_fd; i++) { |
4297 | /* Fetch once the poll data */ | |
4298 | revents = LTTNG_POLL_GETEV(&events, i); | |
4299 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4300 | ||
840cb59c | 4301 | health_code_update(); |
44a5e5eb | 4302 | |
fd20dac9 MD |
4303 | if (!revents) { |
4304 | /* No activity for this FD (poll implementation). */ | |
4305 | continue; | |
4306 | } | |
4307 | ||
5eb91c98 | 4308 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4309 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 4310 | if (ret) { |
139ac872 MD |
4311 | err = 0; |
4312 | goto exit; | |
5eb91c98 DG |
4313 | } |
4314 | ||
4315 | /* Event on the registration socket */ | |
4316 | if (pollfd == client_sock) { | |
4317 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
4318 | ERR("Client socket poll error"); | |
4319 | goto error; | |
4320 | } | |
4321 | } | |
4322 | } | |
4323 | ||
4324 | DBG("Wait for client response"); | |
4325 | ||
840cb59c | 4326 | health_code_update(); |
44a5e5eb | 4327 | |
5eb91c98 DG |
4328 | sock = lttcomm_accept_unix_sock(client_sock); |
4329 | if (sock < 0) { | |
273ea72c | 4330 | goto error; |
273ea72c DG |
4331 | } |
4332 | ||
b662582b DG |
4333 | /* |
4334 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4335 | * show must go on. | |
4336 | */ | |
4337 | (void) utils_set_fd_cloexec(sock); | |
4338 | ||
be040666 DG |
4339 | /* Set socket option for credentials retrieval */ |
4340 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
4341 | if (ret < 0) { | |
4342 | goto error; | |
4343 | } | |
4344 | ||
5eb91c98 | 4345 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 4346 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 4347 | if (cmd_ctx == NULL) { |
76d7553f | 4348 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 4349 | goto error; |
5eb91c98 | 4350 | } |
1d4b027a | 4351 | |
5eb91c98 | 4352 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 4353 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 4354 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 4355 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
4356 | goto error; |
4357 | } | |
1d4b027a | 4358 | |
5eb91c98 DG |
4359 | cmd_ctx->llm = NULL; |
4360 | cmd_ctx->session = NULL; | |
1d4b027a | 4361 | |
840cb59c | 4362 | health_code_update(); |
44a5e5eb | 4363 | |
5eb91c98 DG |
4364 | /* |
4365 | * Data is received from the lttng client. The struct | |
4366 | * lttcomm_session_msg (lsm) contains the command and data request of | |
4367 | * the client. | |
4368 | */ | |
4369 | DBG("Receiving data from client ..."); | |
be040666 DG |
4370 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
4371 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
4372 | if (ret <= 0) { |
4373 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
4374 | ret = close(sock); |
4375 | if (ret) { | |
4376 | PERROR("close"); | |
4377 | } | |
4378 | sock = -1; | |
a2c0da86 | 4379 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4380 | continue; |
4381 | } | |
1d4b027a | 4382 | |
840cb59c | 4383 | health_code_update(); |
44a5e5eb | 4384 | |
5eb91c98 DG |
4385 | // TODO: Validate cmd_ctx including sanity check for |
4386 | // security purpose. | |
f7776ea7 | 4387 | |
f6a9efaa | 4388 | rcu_thread_online(); |
5eb91c98 DG |
4389 | /* |
4390 | * This function dispatch the work to the kernel or userspace tracer | |
4391 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
4392 | * informations for the client. The command context struct contains | |
4393 | * everything this function may needs. | |
4394 | */ | |
53a80697 | 4395 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 4396 | rcu_thread_offline(); |
5eb91c98 | 4397 | if (ret < 0) { |
36134aa1 DG |
4398 | ret = close(sock); |
4399 | if (ret) { | |
4400 | PERROR("close"); | |
53a80697 | 4401 | } |
36134aa1 | 4402 | sock = -1; |
bbd973c2 | 4403 | /* |
5eb91c98 | 4404 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 4405 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
4406 | * (ENOMEM). Error detected but still accept |
4407 | * command, unless a socket error has been | |
4408 | * detected. | |
bbd973c2 | 4409 | */ |
bbd973c2 | 4410 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4411 | continue; |
4412 | } | |
d6e4fca4 | 4413 | |
840cb59c | 4414 | health_code_update(); |
44a5e5eb | 4415 | |
a1ac8b97 | 4416 | DBG("Sending response (size: %d, retcode: %s (%d))", |
54d01ffb | 4417 | cmd_ctx->lttng_msg_size, |
a1ac8b97 JG |
4418 | lttng_strerror(-cmd_ctx->llm->ret_code), |
4419 | cmd_ctx->llm->ret_code); | |
54d01ffb | 4420 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
4421 | if (ret < 0) { |
4422 | ERR("Failed to send data back to client"); | |
bbd973c2 | 4423 | } |
1d4b027a | 4424 | |
5eb91c98 | 4425 | /* End of transmission */ |
76d7553f MD |
4426 | ret = close(sock); |
4427 | if (ret) { | |
4428 | PERROR("close"); | |
4429 | } | |
4430 | sock = -1; | |
be040666 DG |
4431 | |
4432 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 4433 | |
840cb59c | 4434 | health_code_update(); |
273ea72c DG |
4435 | } |
4436 | ||
139ac872 | 4437 | exit: |
5eb91c98 | 4438 | error: |
35df2755 CB |
4439 | if (sock >= 0) { |
4440 | ret = close(sock); | |
4441 | if (ret) { | |
4442 | PERROR("close"); | |
4443 | } | |
139ac872 | 4444 | } |
44a5e5eb | 4445 | |
35df2755 CB |
4446 | lttng_poll_clean(&events); |
4447 | clean_command_ctx(&cmd_ctx); | |
4448 | ||
4449 | error_listen: | |
4450 | error_create_poll: | |
273ea72c | 4451 | unlink(client_unix_sock_path); |
76d7553f MD |
4452 | if (client_sock >= 0) { |
4453 | ret = close(client_sock); | |
4454 | if (ret) { | |
4455 | PERROR("close"); | |
4456 | } | |
a4b35e07 | 4457 | } |
35df2755 CB |
4458 | |
4459 | if (err) { | |
840cb59c | 4460 | health_error(); |
35df2755 | 4461 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4462 | } |
273ea72c | 4463 | |
8782cc74 | 4464 | health_unregister(health_sessiond); |
35df2755 CB |
4465 | |
4466 | DBG("Client thread dying"); | |
f6a9efaa DG |
4467 | |
4468 | rcu_unregister_thread(); | |
4a15001e MD |
4469 | |
4470 | /* | |
4471 | * Since we are creating the consumer threads, we own them, so we need | |
4472 | * to join them before our thread exits. | |
4473 | */ | |
4474 | ret = join_consumer_thread(&kconsumer_data); | |
4475 | if (ret) { | |
4476 | errno = ret; | |
4477 | PERROR("join_consumer"); | |
4478 | } | |
4479 | ||
4480 | ret = join_consumer_thread(&ustconsumer32_data); | |
4481 | if (ret) { | |
4482 | errno = ret; | |
4483 | PERROR("join_consumer ust32"); | |
4484 | } | |
4485 | ||
4486 | ret = join_consumer_thread(&ustconsumer64_data); | |
4487 | if (ret) { | |
4488 | errno = ret; | |
4489 | PERROR("join_consumer ust64"); | |
4490 | } | |
1d4b027a DG |
4491 | return NULL; |
4492 | } | |
4493 | ||
4494 | ||
fac6795d DG |
4495 | /* |
4496 | * usage function on stderr | |
4497 | */ | |
4498 | static void usage(void) | |
4499 | { | |
b716ce68 | 4500 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
4501 | fprintf(stderr, " -h, --help Display this usage.\n"); |
4502 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
4503 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
4504 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
4505 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
4506 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
4507 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
4508 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
4509 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
4510 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
4511 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
4512 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
4513 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 | 4514 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
72dd7491 | 4515 | fprintf(stderr, " -b, --background Start as a daemon, keeping console open.\n"); |
d6f42150 DG |
4516 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); |
4517 | fprintf(stderr, " -V, --version Show version number.\n"); | |
7fe6d2c5 | 4518 | fprintf(stderr, " -S, --sig-parent Send SIGUSR1 to parent pid to notify readiness.\n"); |
d6f42150 DG |
4519 | fprintf(stderr, " -q, --quiet No output at all.\n"); |
4520 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
35f90c40 | 4521 | fprintf(stderr, " -p, --pidfile FILE Write a pid to FILE name overriding the default value.\n"); |
3bd1e081 | 4522 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 4523 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
1b2ef7fe | 4524 | fprintf(stderr, " --agent-tcp-port Agent registration TCP port\n"); |
76d01ebb | 4525 | fprintf(stderr, " -f --config PATH Load daemon configuration file\n"); |
ef367a93 | 4526 | fprintf(stderr, " -l --load PATH Load session configuration\n"); |
fbb9748b | 4527 | fprintf(stderr, " --kmod-probes Specify kernel module probes to load\n"); |
c9d42407 | 4528 | fprintf(stderr, " --extra-kmod-probes Specify extra kernel module probes to load\n"); |
fac6795d DG |
4529 | } |
4530 | ||
c0232ea5 JG |
4531 | static int string_match(const char *str1, const char *str2) |
4532 | { | |
4533 | return (str1 && str2) && !strcmp(str1, str2); | |
4534 | } | |
4535 | ||
fac6795d | 4536 | /* |
26296c48 JG |
4537 | * Take an option from the getopt output and set it in the right variable to be |
4538 | * used later. | |
4539 | * | |
4540 | * Return 0 on success else a negative value. | |
fac6795d | 4541 | */ |
26296c48 | 4542 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4543 | { |
26296c48 | 4544 | int ret = 0; |
fac6795d | 4545 | |
c5d350b2 JG |
4546 | if (arg && arg[0] == '\0') { |
4547 | /* | |
4548 | * This only happens if the value is read from daemon config | |
4549 | * file. This means the option requires an argument and the | |
4550 | * configuration file contains a line such as: | |
4551 | * my_option = | |
4552 | */ | |
4553 | ret = -EINVAL; | |
4554 | goto end; | |
4555 | } | |
4556 | ||
c0232ea5 | 4557 | if (string_match(optname, "client-sock") || opt == 'c') { |
e8fa9fb0 MD |
4558 | if (lttng_is_setuid_setgid()) { |
4559 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4560 | "-c, --client-sock"); | |
4561 | } else { | |
4562 | snprintf(client_unix_sock_path, PATH_MAX, "%s", arg); | |
4563 | } | |
c0232ea5 | 4564 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
e8fa9fb0 MD |
4565 | if (lttng_is_setuid_setgid()) { |
4566 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4567 | "-a, --apps-sock"); | |
4568 | } else { | |
4569 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", arg); | |
4570 | } | |
c0232ea5 | 4571 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
26296c48 | 4572 | opt_daemon = 1; |
c0232ea5 | 4573 | } else if (string_match(optname, "background") || opt == 'b') { |
72dd7491 | 4574 | opt_background = 1; |
c0232ea5 | 4575 | } else if (string_match(optname, "group") || opt == 'g') { |
e8fa9fb0 MD |
4576 | if (lttng_is_setuid_setgid()) { |
4577 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4578 | "-g, --group"); | |
4579 | } else { | |
4580 | /* | |
4581 | * If the override option is set, the pointer points to a | |
4582 | * *non* const thus freeing it even though the variable type is | |
4583 | * set to const. | |
4584 | */ | |
4585 | if (tracing_group_name_override) { | |
4586 | free((void *) tracing_group_name); | |
4587 | } | |
4588 | tracing_group_name = strdup(arg); | |
4589 | if (!tracing_group_name) { | |
4590 | PERROR("strdup"); | |
4591 | ret = -ENOMEM; | |
4592 | } | |
4593 | tracing_group_name_override = 1; | |
db322c4d | 4594 | } |
c0232ea5 | 4595 | } else if (string_match(optname, "help") || opt == 'h') { |
26296c48 | 4596 | usage(); |
4a15001e | 4597 | exit(EXIT_SUCCESS); |
c0232ea5 | 4598 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
4599 | fprintf(stdout, "%s\n", VERSION); |
4600 | exit(EXIT_SUCCESS); | |
c0232ea5 | 4601 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
26296c48 | 4602 | opt_sig_parent = 1; |
c0232ea5 | 4603 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
e8fa9fb0 MD |
4604 | if (lttng_is_setuid_setgid()) { |
4605 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4606 | "--kconsumerd-err-sock"); | |
4607 | } else { | |
4608 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4609 | } | |
c0232ea5 | 4610 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
e8fa9fb0 MD |
4611 | if (lttng_is_setuid_setgid()) { |
4612 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4613 | "--kconsumerd-cmd-sock"); | |
4614 | } else { | |
4615 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4616 | } | |
c0232ea5 | 4617 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
e8fa9fb0 MD |
4618 | if (lttng_is_setuid_setgid()) { |
4619 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4620 | "--ustconsumerd64-err-sock"); | |
4621 | } else { | |
4622 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4623 | } | |
c0232ea5 | 4624 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
e8fa9fb0 MD |
4625 | if (lttng_is_setuid_setgid()) { |
4626 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4627 | "--ustconsumerd64-cmd-sock"); | |
4628 | } else { | |
4629 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4630 | } | |
c0232ea5 | 4631 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
e8fa9fb0 MD |
4632 | if (lttng_is_setuid_setgid()) { |
4633 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4634 | "--ustconsumerd32-err-sock"); | |
4635 | } else { | |
4636 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4637 | } | |
c0232ea5 | 4638 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
e8fa9fb0 MD |
4639 | if (lttng_is_setuid_setgid()) { |
4640 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4641 | "--ustconsumerd32-cmd-sock"); | |
4642 | } else { | |
4643 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4644 | } | |
c0232ea5 | 4645 | } else if (string_match(optname, "no-kernel")) { |
26296c48 | 4646 | opt_no_kernel = 1; |
c0232ea5 | 4647 | } else if (string_match(optname, "quiet") || opt == 'q') { |
26296c48 | 4648 | lttng_opt_quiet = 1; |
c0232ea5 | 4649 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
4650 | /* Verbose level can increase using multiple -v */ |
4651 | if (arg) { | |
13755a18 | 4652 | /* Value obtained from config file */ |
26296c48 JG |
4653 | lttng_opt_verbose = config_parse_value(arg); |
4654 | } else { | |
13755a18 JG |
4655 | /* -v used on command line */ |
4656 | lttng_opt_verbose++; | |
26296c48 | 4657 | } |
13755a18 JG |
4658 | /* Clamp value to [0, 3] */ |
4659 | lttng_opt_verbose = lttng_opt_verbose < 0 ? 0 : | |
4660 | (lttng_opt_verbose <= 3 ? lttng_opt_verbose : 3); | |
c0232ea5 | 4661 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 JG |
4662 | if (arg) { |
4663 | opt_verbose_consumer = config_parse_value(arg); | |
4664 | } else { | |
3bd1e081 | 4665 | opt_verbose_consumer += 1; |
26296c48 | 4666 | } |
c0232ea5 | 4667 | } else if (string_match(optname, "consumerd32-path")) { |
e8fa9fb0 MD |
4668 | if (lttng_is_setuid_setgid()) { |
4669 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4670 | "--consumerd32-path"); | |
4671 | } else { | |
4672 | if (consumerd32_bin_override) { | |
4673 | free((void *) consumerd32_bin); | |
4674 | } | |
4675 | consumerd32_bin = strdup(arg); | |
4676 | if (!consumerd32_bin) { | |
4677 | PERROR("strdup"); | |
4678 | ret = -ENOMEM; | |
4679 | } | |
4680 | consumerd32_bin_override = 1; | |
db322c4d | 4681 | } |
c0232ea5 | 4682 | } else if (string_match(optname, "consumerd32-libdir")) { |
e8fa9fb0 MD |
4683 | if (lttng_is_setuid_setgid()) { |
4684 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4685 | "--consumerd32-libdir"); | |
4686 | } else { | |
4687 | if (consumerd32_libdir_override) { | |
4688 | free((void *) consumerd32_libdir); | |
4689 | } | |
4690 | consumerd32_libdir = strdup(arg); | |
4691 | if (!consumerd32_libdir) { | |
4692 | PERROR("strdup"); | |
4693 | ret = -ENOMEM; | |
4694 | } | |
4695 | consumerd32_libdir_override = 1; | |
db322c4d | 4696 | } |
c0232ea5 | 4697 | } else if (string_match(optname, "consumerd64-path")) { |
e8fa9fb0 MD |
4698 | if (lttng_is_setuid_setgid()) { |
4699 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4700 | "--consumerd64-path"); | |
4701 | } else { | |
4702 | if (consumerd64_bin_override) { | |
4703 | free((void *) consumerd64_bin); | |
4704 | } | |
4705 | consumerd64_bin = strdup(arg); | |
4706 | if (!consumerd64_bin) { | |
4707 | PERROR("strdup"); | |
4708 | ret = -ENOMEM; | |
4709 | } | |
4710 | consumerd64_bin_override = 1; | |
db322c4d | 4711 | } |
c0232ea5 | 4712 | } else if (string_match(optname, "consumerd64-libdir")) { |
e8fa9fb0 MD |
4713 | if (lttng_is_setuid_setgid()) { |
4714 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4715 | "--consumerd64-libdir"); | |
4716 | } else { | |
4717 | if (consumerd64_libdir_override) { | |
4718 | free((void *) consumerd64_libdir); | |
4719 | } | |
4720 | consumerd64_libdir = strdup(arg); | |
4721 | if (!consumerd64_libdir) { | |
4722 | PERROR("strdup"); | |
4723 | ret = -ENOMEM; | |
4724 | } | |
4725 | consumerd64_libdir_override = 1; | |
db322c4d | 4726 | } |
c0232ea5 | 4727 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
e8fa9fb0 MD |
4728 | if (lttng_is_setuid_setgid()) { |
4729 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4730 | "-p, --pidfile"); | |
4731 | } else { | |
4732 | free(opt_pidfile); | |
4733 | opt_pidfile = strdup(arg); | |
4734 | if (!opt_pidfile) { | |
4735 | PERROR("strdup"); | |
4736 | ret = -ENOMEM; | |
4737 | } | |
db322c4d | 4738 | } |
c0232ea5 | 4739 | } else if (string_match(optname, "agent-tcp-port")) { |
e8fa9fb0 MD |
4740 | if (lttng_is_setuid_setgid()) { |
4741 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4742 | "--agent-tcp-port"); | |
4743 | } else { | |
4744 | unsigned long v; | |
4d076222 | 4745 | |
e04aa23e JG |
4746 | if (!arg) { |
4747 | ret = -EINVAL; | |
4748 | goto end; | |
4749 | } | |
e8fa9fb0 MD |
4750 | errno = 0; |
4751 | v = strtoul(arg, NULL, 0); | |
4752 | if (errno != 0 || !isdigit(arg[0])) { | |
4753 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
4754 | return -1; | |
4755 | } | |
4756 | if (v == 0 || v >= 65535) { | |
4757 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
4758 | return -1; | |
4759 | } | |
4760 | agent_tcp_port = (uint32_t) v; | |
4761 | DBG3("Agent TCP port set to non default: %u", agent_tcp_port); | |
26296c48 | 4762 | } |
c0232ea5 | 4763 | } else if (string_match(optname, "load") || opt == 'l') { |
e8fa9fb0 MD |
4764 | if (lttng_is_setuid_setgid()) { |
4765 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4766 | "-l, --load"); | |
4767 | } else { | |
4768 | free(opt_load_session_path); | |
4769 | opt_load_session_path = strdup(arg); | |
4770 | if (!opt_load_session_path) { | |
4771 | PERROR("strdup"); | |
4772 | ret = -ENOMEM; | |
4773 | } | |
ef367a93 | 4774 | } |
c0232ea5 | 4775 | } else if (string_match(optname, "kmod-probes")) { |
e8fa9fb0 MD |
4776 | if (lttng_is_setuid_setgid()) { |
4777 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4778 | "--kmod-probes"); | |
4779 | } else { | |
4780 | free(kmod_probes_list); | |
4781 | kmod_probes_list = strdup(arg); | |
4782 | if (!kmod_probes_list) { | |
4783 | PERROR("strdup"); | |
4784 | ret = -ENOMEM; | |
4785 | } | |
c9d42407 | 4786 | } |
c0232ea5 | 4787 | } else if (string_match(optname, "extra-kmod-probes")) { |
e8fa9fb0 MD |
4788 | if (lttng_is_setuid_setgid()) { |
4789 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4790 | "--extra-kmod-probes"); | |
4791 | } else { | |
4792 | free(kmod_extra_probes_list); | |
4793 | kmod_extra_probes_list = strdup(arg); | |
4794 | if (!kmod_extra_probes_list) { | |
4795 | PERROR("strdup"); | |
4796 | ret = -ENOMEM; | |
4797 | } | |
db322c4d | 4798 | } |
c0232ea5 JG |
4799 | } else if (string_match(optname, "config") || opt == 'f') { |
4800 | /* This is handled in set_options() thus silent skip. */ | |
4801 | goto end; | |
4802 | } else { | |
26296c48 JG |
4803 | /* Unknown option or other error. |
4804 | * Error is printed by getopt, just return */ | |
4805 | ret = -1; | |
4806 | } | |
4807 | ||
f3dd7ce7 | 4808 | end: |
c5d350b2 JG |
4809 | if (ret == -EINVAL) { |
4810 | const char *opt_name = "unknown"; | |
4811 | int i; | |
4812 | ||
4813 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
4814 | i++) { | |
4815 | if (opt == long_options[i].val) { | |
4816 | opt_name = long_options[i].name; | |
4817 | break; | |
4818 | } | |
4819 | } | |
4820 | ||
4821 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
4822 | opt_name); | |
4823 | } | |
f3dd7ce7 | 4824 | |
26296c48 JG |
4825 | return ret; |
4826 | } | |
4827 | ||
4828 | /* | |
4829 | * config_entry_handler_cb used to handle options read from a config file. | |
4830 | * See config_entry_handler_cb comment in common/config/config.h for the | |
4831 | * return value conventions. | |
4832 | */ | |
4833 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
4834 | { | |
4835 | int ret = 0, i; | |
4836 | ||
4837 | if (!entry || !entry->name || !entry->value) { | |
4838 | ret = -EINVAL; | |
4839 | goto end; | |
4840 | } | |
4841 | ||
4842 | /* Check if the option is to be ignored */ | |
4843 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
4844 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
4845 | goto end; | |
4846 | } | |
4847 | } | |
4848 | ||
4849 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
4850 | i++) { | |
4851 | ||
4852 | /* Ignore if not fully matched. */ | |
4853 | if (strcmp(entry->name, long_options[i].name)) { | |
4854 | continue; | |
4855 | } | |
4856 | ||
4857 | /* | |
4858 | * If the option takes no argument on the command line, we have to | |
4859 | * check if the value is "true". We support non-zero numeric values, | |
4860 | * true, on and yes. | |
4861 | */ | |
4862 | if (!long_options[i].has_arg) { | |
4863 | ret = config_parse_value(entry->value); | |
4864 | if (ret <= 0) { | |
4865 | if (ret) { | |
4866 | WARN("Invalid configuration value \"%s\" for option %s", | |
4867 | entry->value, entry->name); | |
4868 | } | |
4869 | /* False, skip boolean config option. */ | |
4870 | goto end; | |
4d076222 | 4871 | } |
26296c48 JG |
4872 | } |
4873 | ||
4874 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
4875 | goto end; | |
4876 | } | |
4877 | ||
4878 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
4879 | ||
4880 | end: | |
4881 | return ret; | |
4882 | } | |
4883 | ||
4884 | /* | |
4885 | * daemon configuration loading and argument parsing | |
4886 | */ | |
4887 | static int set_options(int argc, char **argv) | |
4888 | { | |
4889 | int ret = 0, c = 0, option_index = 0; | |
4890 | int orig_optopt = optopt, orig_optind = optind; | |
4891 | char *optstring; | |
4892 | const char *config_path = NULL; | |
4893 | ||
4894 | optstring = utils_generate_optstring(long_options, | |
4895 | sizeof(long_options) / sizeof(struct option)); | |
4896 | if (!optstring) { | |
4897 | ret = -ENOMEM; | |
4898 | goto end; | |
4899 | } | |
4900 | ||
4901 | /* Check for the --config option */ | |
4902 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
4903 | &option_index)) != -1) { | |
4904 | if (c == '?') { | |
4905 | ret = -EINVAL; | |
4906 | goto end; | |
4907 | } else if (c != 'f') { | |
4908 | /* if not equal to --config option. */ | |
4909 | continue; | |
4910 | } | |
4911 | ||
e8fa9fb0 MD |
4912 | if (lttng_is_setuid_setgid()) { |
4913 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4914 | "-f, --config"); | |
4915 | } else { | |
4916 | config_path = utils_expand_path(optarg); | |
4917 | if (!config_path) { | |
4918 | ERR("Failed to resolve path: %s", optarg); | |
4919 | } | |
26296c48 JG |
4920 | } |
4921 | } | |
4922 | ||
4923 | ret = config_get_section_entries(config_path, config_section_name, | |
4924 | config_entry_handler, NULL); | |
4925 | if (ret) { | |
4926 | if (ret > 0) { | |
4927 | ERR("Invalid configuration option at line %i", ret); | |
4928 | ret = -1; | |
4929 | } | |
4930 | goto end; | |
4931 | } | |
4932 | ||
4933 | /* Reset getopt's global state */ | |
4934 | optopt = orig_optopt; | |
4935 | optind = orig_optind; | |
4936 | while (1) { | |
c0232ea5 JG |
4937 | option_index = -1; |
4938 | /* | |
4939 | * getopt_long() will not set option_index if it encounters a | |
4940 | * short option. | |
4941 | */ | |
4942 | c = getopt_long(argc, argv, optstring, long_options, | |
4943 | &option_index); | |
26296c48 | 4944 | if (c == -1) { |
4d076222 DG |
4945 | break; |
4946 | } | |
26296c48 | 4947 | |
c0232ea5 JG |
4948 | /* |
4949 | * Pass NULL as the long option name if popt left the index | |
4950 | * unset. | |
4951 | */ | |
4952 | ret = set_option(c, optarg, | |
4953 | option_index < 0 ? NULL : | |
4954 | long_options[option_index].name); | |
26296c48 JG |
4955 | if (ret < 0) { |
4956 | break; | |
fac6795d DG |
4957 | } |
4958 | } | |
4959 | ||
26296c48 JG |
4960 | end: |
4961 | free(optstring); | |
4962 | return ret; | |
fac6795d DG |
4963 | } |
4964 | ||
4965 | /* | |
d063d709 | 4966 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
4967 | * apps_sock - The communication socket for all UST apps. |
4968 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 4969 | */ |
cf3af59e | 4970 | static int init_daemon_socket(void) |
fac6795d DG |
4971 | { |
4972 | int ret = 0; | |
4973 | mode_t old_umask; | |
4974 | ||
4975 | old_umask = umask(0); | |
4976 | ||
4977 | /* Create client tool unix socket */ | |
d6f42150 DG |
4978 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
4979 | if (client_sock < 0) { | |
4980 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
4981 | ret = -1; |
4982 | goto end; | |
4983 | } | |
4984 | ||
b662582b DG |
4985 | /* Set the cloexec flag */ |
4986 | ret = utils_set_fd_cloexec(client_sock); | |
4987 | if (ret < 0) { | |
4988 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
4989 | "Continuing but note that the consumer daemon will have a " | |
4990 | "reference to this socket on exec()", client_sock); | |
4991 | } | |
4992 | ||
fac6795d DG |
4993 | /* File permission MUST be 660 */ |
4994 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4995 | if (ret < 0) { | |
d6f42150 | 4996 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 4997 | PERROR("chmod"); |
fac6795d DG |
4998 | goto end; |
4999 | } | |
5000 | ||
5001 | /* Create the application unix socket */ | |
d6f42150 DG |
5002 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
5003 | if (apps_sock < 0) { | |
5004 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
5005 | ret = -1; |
5006 | goto end; | |
5007 | } | |
5008 | ||
b662582b DG |
5009 | /* Set the cloexec flag */ |
5010 | ret = utils_set_fd_cloexec(apps_sock); | |
5011 | if (ret < 0) { | |
5012 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
5013 | "Continuing but note that the consumer daemon will have a " | |
5014 | "reference to this socket on exec()", apps_sock); | |
5015 | } | |
5016 | ||
d6f42150 | 5017 | /* File permission MUST be 666 */ |
54d01ffb DG |
5018 | ret = chmod(apps_unix_sock_path, |
5019 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 5020 | if (ret < 0) { |
d6f42150 | 5021 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 5022 | PERROR("chmod"); |
fac6795d DG |
5023 | goto end; |
5024 | } | |
5025 | ||
b662582b DG |
5026 | DBG3("Session daemon client socket %d and application socket %d created", |
5027 | client_sock, apps_sock); | |
5028 | ||
fac6795d DG |
5029 | end: |
5030 | umask(old_umask); | |
5031 | return ret; | |
5032 | } | |
5033 | ||
5034 | /* | |
54d01ffb DG |
5035 | * Check if the global socket is available, and if a daemon is answering at the |
5036 | * other side. If yes, error is returned. | |
fac6795d | 5037 | */ |
cf3af59e | 5038 | static int check_existing_daemon(void) |
fac6795d | 5039 | { |
7d8234d9 | 5040 | /* Is there anybody out there ? */ |
099e26bd | 5041 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 5042 | return -EEXIST; |
099e26bd | 5043 | } |
b09c7c76 DG |
5044 | |
5045 | return 0; | |
fac6795d DG |
5046 | } |
5047 | ||
fac6795d | 5048 | /* |
d063d709 | 5049 | * Set the tracing group gid onto the client socket. |
5e16da05 | 5050 | * |
d063d709 | 5051 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 5052 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 5053 | */ |
be040666 | 5054 | static int set_permissions(char *rundir) |
fac6795d DG |
5055 | { |
5056 | int ret; | |
996b65c8 | 5057 | gid_t gid; |
fac6795d | 5058 | |
6c71277b | 5059 | gid = utils_get_group_id(tracing_group_name); |
fac6795d | 5060 | |
d6f42150 | 5061 | /* Set lttng run dir */ |
be040666 | 5062 | ret = chown(rundir, 0, gid); |
d6f42150 | 5063 | if (ret < 0) { |
be040666 | 5064 | ERR("Unable to set group on %s", rundir); |
76d7553f | 5065 | PERROR("chown"); |
d6f42150 DG |
5066 | } |
5067 | ||
6c71277b MD |
5068 | /* |
5069 | * Ensure all applications and tracing group can search the run | |
5070 | * dir. Allow everyone to read the directory, since it does not | |
5071 | * buy us anything to hide its content. | |
5072 | */ | |
5073 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
5074 | if (ret < 0) { |
5075 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 5076 | PERROR("chmod"); |
d1613cf5 JN |
5077 | } |
5078 | ||
d6f42150 | 5079 | /* lttng client socket path */ |
996b65c8 | 5080 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 5081 | if (ret < 0) { |
d6f42150 | 5082 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 5083 | PERROR("chown"); |
d6f42150 DG |
5084 | } |
5085 | ||
3bd1e081 | 5086 | /* kconsumer error socket path */ |
6c71277b | 5087 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 5088 | if (ret < 0) { |
3bd1e081 | 5089 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 5090 | PERROR("chown"); |
3bd1e081 MD |
5091 | } |
5092 | ||
7753dea8 | 5093 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 5094 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
5095 | if (ret < 0) { |
5096 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 5097 | PERROR("chown"); |
7753dea8 MD |
5098 | } |
5099 | ||
5100 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 5101 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 5102 | if (ret < 0) { |
7753dea8 | 5103 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 5104 | PERROR("chown"); |
fac6795d DG |
5105 | } |
5106 | ||
d6f42150 | 5107 | DBG("All permissions are set"); |
e07ae692 | 5108 | |
fac6795d DG |
5109 | return ret; |
5110 | } | |
5111 | ||
d6f42150 | 5112 | /* |
d063d709 | 5113 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 5114 | */ |
67e40797 | 5115 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
5116 | { |
5117 | int ret; | |
5118 | ||
67e40797 DG |
5119 | DBG3("Creating LTTng run directory: %s", rundir); |
5120 | ||
d1613cf5 | 5121 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 5122 | if (ret < 0) { |
b1f11e69 | 5123 | if (errno != EEXIST) { |
67e40797 | 5124 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
5125 | goto error; |
5126 | } else { | |
5127 | ret = 0; | |
5128 | } | |
d6f42150 DG |
5129 | } |
5130 | ||
5131 | error: | |
5132 | return ret; | |
5133 | } | |
5134 | ||
5135 | /* | |
d063d709 DG |
5136 | * Setup sockets and directory needed by the kconsumerd communication with the |
5137 | * session daemon. | |
d6f42150 | 5138 | */ |
67e40797 DG |
5139 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
5140 | const char *rundir) | |
d6f42150 DG |
5141 | { |
5142 | int ret; | |
67e40797 | 5143 | char path[PATH_MAX]; |
d6f42150 | 5144 | |
6c71277b | 5145 | switch (consumer_data->type) { |
7753dea8 | 5146 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 5147 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
5148 | break; |
5149 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 5150 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
5151 | break; |
5152 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 5153 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
5154 | break; |
5155 | default: | |
5156 | ERR("Consumer type unknown"); | |
5157 | ret = -EINVAL; | |
5158 | goto error; | |
d6f42150 DG |
5159 | } |
5160 | ||
67e40797 DG |
5161 | DBG2("Creating consumer directory: %s", path); |
5162 | ||
6c71277b | 5163 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
d6f42150 | 5164 | if (ret < 0) { |
6beb2242 | 5165 | if (errno != EEXIST) { |
f11e84c2 | 5166 | PERROR("mkdir"); |
3bd1e081 | 5167 | ERR("Failed to create %s", path); |
6beb2242 DG |
5168 | goto error; |
5169 | } | |
f11e84c2 | 5170 | ret = -1; |
d6f42150 | 5171 | } |
6c71277b MD |
5172 | if (is_root) { |
5173 | ret = chown(path, 0, utils_get_group_id(tracing_group_name)); | |
5174 | if (ret < 0) { | |
5175 | ERR("Unable to set group on %s", path); | |
5176 | PERROR("chown"); | |
5177 | goto error; | |
5178 | } | |
5179 | } | |
d6f42150 DG |
5180 | |
5181 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
5182 | consumer_data->err_sock = |
5183 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
5184 | if (consumer_data->err_sock < 0) { | |
5185 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
5186 | ret = -1; |
5187 | goto error; | |
5188 | } | |
5189 | ||
a24f05ab MD |
5190 | /* |
5191 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
5192 | * show must go on. | |
5193 | */ | |
5194 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
5195 | if (ret < 0) { | |
5196 | PERROR("utils_set_fd_cloexec"); | |
5197 | /* continue anyway */ | |
5198 | } | |
5199 | ||
d6f42150 | 5200 | /* File permission MUST be 660 */ |
3bd1e081 | 5201 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 5202 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 5203 | if (ret < 0) { |
3bd1e081 | 5204 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 5205 | PERROR("chmod"); |
d6f42150 DG |
5206 | goto error; |
5207 | } | |
5208 | ||
5209 | error: | |
5210 | return ret; | |
5211 | } | |
5212 | ||
fac6795d | 5213 | /* |
d063d709 | 5214 | * Signal handler for the daemon |
cf3af59e | 5215 | * |
54d01ffb DG |
5216 | * Simply stop all worker threads, leaving main() return gracefully after |
5217 | * joining all threads and calling cleanup(). | |
fac6795d DG |
5218 | */ |
5219 | static void sighandler(int sig) | |
5220 | { | |
5221 | switch (sig) { | |
cf3af59e | 5222 | case SIGPIPE: |
af87c45a | 5223 | DBG("SIGPIPE caught"); |
cf3af59e MD |
5224 | return; |
5225 | case SIGINT: | |
af87c45a | 5226 | DBG("SIGINT caught"); |
cf3af59e MD |
5227 | stop_threads(); |
5228 | break; | |
5229 | case SIGTERM: | |
af87c45a | 5230 | DBG("SIGTERM caught"); |
cf3af59e MD |
5231 | stop_threads(); |
5232 | break; | |
0bb7724a DG |
5233 | case SIGUSR1: |
5234 | CMM_STORE_SHARED(recv_child_signal, 1); | |
5235 | break; | |
cf3af59e MD |
5236 | default: |
5237 | break; | |
fac6795d | 5238 | } |
fac6795d DG |
5239 | } |
5240 | ||
5241 | /* | |
d063d709 | 5242 | * Setup signal handler for : |
1d4b027a | 5243 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 5244 | */ |
1d4b027a | 5245 | static int set_signal_handler(void) |
fac6795d | 5246 | { |
1d4b027a DG |
5247 | int ret = 0; |
5248 | struct sigaction sa; | |
5249 | sigset_t sigset; | |
fac6795d | 5250 | |
1d4b027a | 5251 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 5252 | PERROR("sigemptyset"); |
1d4b027a DG |
5253 | return ret; |
5254 | } | |
d6f42150 | 5255 | |
1d4b027a DG |
5256 | sa.sa_handler = sighandler; |
5257 | sa.sa_mask = sigset; | |
5258 | sa.sa_flags = 0; | |
5259 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 5260 | PERROR("sigaction"); |
1d4b027a | 5261 | return ret; |
d6f42150 DG |
5262 | } |
5263 | ||
1d4b027a | 5264 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 5265 | PERROR("sigaction"); |
1d4b027a | 5266 | return ret; |
d6f42150 | 5267 | } |
aaf26714 | 5268 | |
1d4b027a | 5269 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 5270 | PERROR("sigaction"); |
1d4b027a | 5271 | return ret; |
8c0faa1d DG |
5272 | } |
5273 | ||
0bb7724a DG |
5274 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
5275 | PERROR("sigaction"); | |
5276 | return ret; | |
5277 | } | |
5278 | ||
5279 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
5280 | |
5281 | return ret; | |
fac6795d DG |
5282 | } |
5283 | ||
f3ed775e | 5284 | /* |
d063d709 DG |
5285 | * Set open files limit to unlimited. This daemon can open a large number of |
5286 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
5287 | */ |
5288 | static void set_ulimit(void) | |
5289 | { | |
5290 | int ret; | |
5291 | struct rlimit lim; | |
5292 | ||
a88df331 | 5293 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
5294 | lim.rlim_cur = 65535; |
5295 | lim.rlim_max = 65535; | |
5296 | ||
5297 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
5298 | if (ret < 0) { | |
76d7553f | 5299 | PERROR("failed to set open files limit"); |
f3ed775e DG |
5300 | } |
5301 | } | |
5302 | ||
35f90c40 DG |
5303 | /* |
5304 | * Write pidfile using the rundir and opt_pidfile. | |
5305 | */ | |
4a15001e | 5306 | static int write_pidfile(void) |
35f90c40 DG |
5307 | { |
5308 | int ret; | |
5309 | char pidfile_path[PATH_MAX]; | |
5310 | ||
5311 | assert(rundir); | |
5312 | ||
5313 | if (opt_pidfile) { | |
5314 | strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path)); | |
5315 | } else { | |
5316 | /* Build pidfile path from rundir and opt_pidfile. */ | |
5317 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
5318 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
5319 | if (ret < 0) { | |
5320 | PERROR("snprintf pidfile path"); | |
5321 | goto error; | |
5322 | } | |
5323 | } | |
5324 | ||
5325 | /* | |
4a15001e | 5326 | * Create pid file in rundir. |
35f90c40 | 5327 | */ |
4a15001e | 5328 | ret = utils_create_pid_file(getpid(), pidfile_path); |
35f90c40 | 5329 | error: |
4a15001e | 5330 | return ret; |
35f90c40 DG |
5331 | } |
5332 | ||
c9cb3e7d JG |
5333 | /* |
5334 | * Create lockfile using the rundir and return its fd. | |
5335 | */ | |
5336 | static int create_lockfile(void) | |
5337 | { | |
5338 | int ret; | |
5339 | char lockfile_path[PATH_MAX]; | |
5340 | ||
5341 | ret = generate_lock_file_path(lockfile_path, sizeof(lockfile_path)); | |
5342 | if (ret < 0) { | |
5343 | goto error; | |
5344 | } | |
5345 | ||
5346 | ret = utils_create_lock_file(lockfile_path); | |
5347 | error: | |
5348 | return ret; | |
5349 | } | |
5350 | ||
cd9290dd | 5351 | /* |
022d91ba | 5352 | * Write agent TCP port using the rundir. |
cd9290dd | 5353 | */ |
4a15001e | 5354 | static int write_agent_port(void) |
cd9290dd DG |
5355 | { |
5356 | int ret; | |
5357 | char path[PATH_MAX]; | |
5358 | ||
5359 | assert(rundir); | |
5360 | ||
5361 | ret = snprintf(path, sizeof(path), "%s/" | |
022d91ba | 5362 | DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE, rundir); |
cd9290dd | 5363 | if (ret < 0) { |
022d91ba | 5364 | PERROR("snprintf agent port path"); |
cd9290dd DG |
5365 | goto error; |
5366 | } | |
5367 | ||
5368 | /* | |
4a15001e | 5369 | * Create TCP agent port file in rundir. |
cd9290dd | 5370 | */ |
4a15001e | 5371 | ret = utils_create_pid_file(agent_tcp_port, path); |
cd9290dd DG |
5372 | |
5373 | error: | |
4a15001e | 5374 | return ret; |
ef367a93 JG |
5375 | } |
5376 | ||
fac6795d DG |
5377 | /* |
5378 | * main | |
5379 | */ | |
5380 | int main(int argc, char **argv) | |
5381 | { | |
4a15001e | 5382 | int ret = 0, retval = 0; |
fac6795d | 5383 | void *status; |
ae9e45b3 | 5384 | const char *home_path, *env_app_timeout; |
fac6795d | 5385 | |
335a95b7 MD |
5386 | init_kernel_workarounds(); |
5387 | ||
f6a9efaa DG |
5388 | rcu_register_thread(); |
5389 | ||
4a15001e MD |
5390 | if (set_signal_handler()) { |
5391 | retval = -1; | |
5392 | goto exit_set_signal_handler; | |
0bb7724a DG |
5393 | } |
5394 | ||
7753dea8 | 5395 | setup_consumerd_path(); |
fb09408a | 5396 | |
12744796 DG |
5397 | page_size = sysconf(_SC_PAGESIZE); |
5398 | if (page_size < 0) { | |
5399 | PERROR("sysconf _SC_PAGESIZE"); | |
5400 | page_size = LONG_MAX; | |
5401 | WARN("Fallback page size to %ld", page_size); | |
5402 | } | |
5403 | ||
4a15001e MD |
5404 | /* |
5405 | * Parse arguments and load the daemon configuration file. | |
5406 | * | |
5407 | * We have an exit_options exit path to free memory reserved by | |
5408 | * set_options. This is needed because the rest of sessiond_cleanup() | |
5409 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
5410 | * depends on set_options. | |
5411 | */ | |
fac6795d | 5412 | progname = argv[0]; |
4a15001e MD |
5413 | if (set_options(argc, argv)) { |
5414 | retval = -1; | |
5415 | goto exit_options; | |
fac6795d DG |
5416 | } |
5417 | ||
5418 | /* Daemonize */ | |
72dd7491 | 5419 | if (opt_daemon || opt_background) { |
ceed52b5 MD |
5420 | int i; |
5421 | ||
72dd7491 MD |
5422 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
5423 | !opt_background); | |
53094c05 | 5424 | if (ret < 0) { |
4a15001e MD |
5425 | retval = -1; |
5426 | goto exit_options; | |
53094c05 | 5427 | } |
0bb7724a | 5428 | |
ceed52b5 | 5429 | /* |
0bb7724a | 5430 | * We are in the child. Make sure all other file descriptors are |
4a15001e MD |
5431 | * closed, in case we are called with more opened file |
5432 | * descriptors than the standard ones. | |
ceed52b5 MD |
5433 | */ |
5434 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
5435 | (void) close(i); | |
5436 | } | |
5437 | } | |
5438 | ||
4a15001e MD |
5439 | /* |
5440 | * Starting from here, we can create threads. This needs to be after | |
5441 | * lttng_daemonize due to RCU. | |
5442 | */ | |
5443 | ||
5444 | /* | |
5445 | * Initialize the health check subsystem. This call should set the | |
5446 | * appropriate time values. | |
5447 | */ | |
5448 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
5449 | if (!health_sessiond) { | |
5450 | PERROR("health_app_create error"); | |
5451 | retval = -1; | |
5452 | goto exit_health_sessiond_cleanup; | |
5453 | } | |
5454 | ||
5455 | if (init_ht_cleanup_quit_pipe()) { | |
5456 | retval = -1; | |
5457 | goto exit_ht_cleanup_quit_pipe; | |
5458 | } | |
5459 | ||
5460 | /* Setup the thread ht_cleanup communication pipe. */ | |
5461 | if (utils_create_pipe_cloexec(ht_cleanup_pipe)) { | |
5462 | retval = -1; | |
5463 | goto exit_ht_cleanup_pipe; | |
5464 | } | |
5465 | ||
25b397f9 MD |
5466 | /* Set up max poll set size */ |
5467 | if (lttng_poll_set_max_size()) { | |
5468 | retval = -1; | |
5469 | goto exit_set_max_size; | |
5470 | } | |
5471 | ||
4a15001e MD |
5472 | /* Create thread to clean up RCU hash tables */ |
5473 | ret = pthread_create(&ht_cleanup_thread, NULL, | |
5474 | thread_ht_cleanup, (void *) NULL); | |
5475 | if (ret) { | |
5476 | errno = ret; | |
5477 | PERROR("pthread_create ht_cleanup"); | |
5478 | retval = -1; | |
5479 | goto exit_ht_cleanup; | |
5480 | } | |
5481 | ||
ceed52b5 | 5482 | /* Create thread quit pipe */ |
4a15001e MD |
5483 | if (init_thread_quit_pipe()) { |
5484 | retval = -1; | |
5485 | goto exit_init_data; | |
fac6795d DG |
5486 | } |
5487 | ||
5488 | /* Check if daemon is UID = 0 */ | |
5489 | is_root = !getuid(); | |
5490 | ||
fac6795d | 5491 | if (is_root) { |
990570ed | 5492 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
4ea184d1 | 5493 | if (!rundir) { |
4a15001e MD |
5494 | retval = -1; |
5495 | goto exit_init_data; | |
4ea184d1 | 5496 | } |
67e40797 DG |
5497 | |
5498 | /* Create global run dir with root access */ | |
4a15001e MD |
5499 | if (create_lttng_rundir(rundir)) { |
5500 | retval = -1; | |
5501 | goto exit_init_data; | |
d6f42150 DG |
5502 | } |
5503 | ||
fac6795d | 5504 | if (strlen(apps_unix_sock_path) == 0) { |
4a15001e | 5505 | ret = snprintf(apps_unix_sock_path, PATH_MAX, |
d6f42150 | 5506 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); |
4a15001e MD |
5507 | if (ret < 0) { |
5508 | retval = -1; | |
5509 | goto exit_init_data; | |
5510 | } | |
fac6795d DG |
5511 | } |
5512 | ||
5513 | if (strlen(client_unix_sock_path) == 0) { | |
4a15001e | 5514 | ret = snprintf(client_unix_sock_path, PATH_MAX, |
d6f42150 | 5515 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); |
4a15001e MD |
5516 | if (ret < 0) { |
5517 | retval = -1; | |
5518 | goto exit_init_data; | |
5519 | } | |
d6f42150 | 5520 | } |
0fdd1e2c DG |
5521 | |
5522 | /* Set global SHM for ust */ | |
5523 | if (strlen(wait_shm_path) == 0) { | |
4a15001e | 5524 | ret = snprintf(wait_shm_path, PATH_MAX, |
0fdd1e2c | 5525 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); |
4a15001e MD |
5526 | if (ret < 0) { |
5527 | retval = -1; | |
5528 | goto exit_init_data; | |
5529 | } | |
0fdd1e2c | 5530 | } |
67e40797 | 5531 | |
44a5e5eb | 5532 | if (strlen(health_unix_sock_path) == 0) { |
4a15001e MD |
5533 | ret = snprintf(health_unix_sock_path, |
5534 | sizeof(health_unix_sock_path), | |
44a5e5eb | 5535 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); |
4a15001e MD |
5536 | if (ret < 0) { |
5537 | retval = -1; | |
5538 | goto exit_init_data; | |
5539 | } | |
44a5e5eb DG |
5540 | } |
5541 | ||
67e40797 | 5542 | /* Setup kernel consumerd path */ |
4a15001e | 5543 | ret = snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5544 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5545 | if (ret < 0) { |
5546 | retval = -1; | |
5547 | goto exit_init_data; | |
5548 | } | |
5549 | ret = snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5550 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5551 | if (ret < 0) { |
5552 | retval = -1; | |
5553 | goto exit_init_data; | |
5554 | } | |
67e40797 DG |
5555 | |
5556 | DBG2("Kernel consumer err path: %s", | |
5557 | kconsumer_data.err_unix_sock_path); | |
5558 | DBG2("Kernel consumer cmd path: %s", | |
5559 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 5560 | } else { |
feb0f3e5 | 5561 | home_path = utils_get_home_dir(); |
b082db07 | 5562 | if (home_path == NULL) { |
273ea72c DG |
5563 | /* TODO: Add --socket PATH option */ |
5564 | ERR("Can't get HOME directory for sockets creation."); | |
4a15001e MD |
5565 | retval = -1; |
5566 | goto exit_init_data; | |
b082db07 DG |
5567 | } |
5568 | ||
67e40797 DG |
5569 | /* |
5570 | * Create rundir from home path. This will create something like | |
5571 | * $HOME/.lttng | |
5572 | */ | |
990570ed | 5573 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 | 5574 | if (ret < 0) { |
4a15001e MD |
5575 | retval = -1; |
5576 | goto exit_init_data; | |
67e40797 DG |
5577 | } |
5578 | ||
4a15001e MD |
5579 | if (create_lttng_rundir(rundir)) { |
5580 | retval = -1; | |
5581 | goto exit_init_data; | |
67e40797 DG |
5582 | } |
5583 | ||
fac6795d | 5584 | if (strlen(apps_unix_sock_path) == 0) { |
4a15001e MD |
5585 | ret = snprintf(apps_unix_sock_path, PATH_MAX, |
5586 | DEFAULT_HOME_APPS_UNIX_SOCK, | |
5587 | home_path); | |
5588 | if (ret < 0) { | |
5589 | retval = -1; | |
5590 | goto exit_init_data; | |
5591 | } | |
fac6795d DG |
5592 | } |
5593 | ||
5594 | /* Set the cli tool unix socket path */ | |
5595 | if (strlen(client_unix_sock_path) == 0) { | |
4a15001e MD |
5596 | ret = snprintf(client_unix_sock_path, PATH_MAX, |
5597 | DEFAULT_HOME_CLIENT_UNIX_SOCK, | |
5598 | home_path); | |
5599 | if (ret < 0) { | |
5600 | retval = -1; | |
5601 | goto exit_init_data; | |
5602 | } | |
fac6795d | 5603 | } |
0fdd1e2c DG |
5604 | |
5605 | /* Set global SHM for ust */ | |
5606 | if (strlen(wait_shm_path) == 0) { | |
4a15001e MD |
5607 | ret = snprintf(wait_shm_path, PATH_MAX, |
5608 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, | |
5609 | getuid()); | |
5610 | if (ret < 0) { | |
5611 | retval = -1; | |
5612 | goto exit_init_data; | |
5613 | } | |
0fdd1e2c | 5614 | } |
44a5e5eb DG |
5615 | |
5616 | /* Set health check Unix path */ | |
5617 | if (strlen(health_unix_sock_path) == 0) { | |
4a15001e MD |
5618 | ret = snprintf(health_unix_sock_path, |
5619 | sizeof(health_unix_sock_path), | |
5620 | DEFAULT_HOME_HEALTH_UNIX_SOCK, | |
5621 | home_path); | |
5622 | if (ret < 0) { | |
5623 | retval = -1; | |
5624 | goto exit_init_data; | |
5625 | } | |
44a5e5eb | 5626 | } |
fac6795d DG |
5627 | } |
5628 | ||
c9cb3e7d JG |
5629 | lockfile_fd = create_lockfile(); |
5630 | if (lockfile_fd < 0) { | |
4a15001e MD |
5631 | retval = -1; |
5632 | goto exit_init_data; | |
c9cb3e7d JG |
5633 | } |
5634 | ||
5c827ce0 DG |
5635 | /* Set consumer initial state */ |
5636 | kernel_consumerd_state = CONSUMER_STOPPED; | |
5637 | ust_consumerd_state = CONSUMER_STOPPED; | |
5638 | ||
847177cd DG |
5639 | DBG("Client socket path %s", client_unix_sock_path); |
5640 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 5641 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
5642 | DBG("LTTng run directory path: %s", rundir); |
5643 | ||
5644 | /* 32 bits consumerd path setup */ | |
4a15001e | 5645 | ret = snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5646 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5647 | if (ret < 0) { |
5648 | PERROR("snprintf 32-bit consumer error socket path"); | |
5649 | retval = -1; | |
5650 | goto exit_init_data; | |
5651 | } | |
5652 | ret = snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5653 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5654 | if (ret < 0) { |
5655 | PERROR("snprintf 32-bit consumer command socket path"); | |
5656 | retval = -1; | |
5657 | goto exit_init_data; | |
5658 | } | |
67e40797 DG |
5659 | |
5660 | DBG2("UST consumer 32 bits err path: %s", | |
5661 | ustconsumer32_data.err_unix_sock_path); | |
5662 | DBG2("UST consumer 32 bits cmd path: %s", | |
5663 | ustconsumer32_data.cmd_unix_sock_path); | |
5664 | ||
5665 | /* 64 bits consumerd path setup */ | |
4a15001e | 5666 | ret = snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5667 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5668 | if (ret < 0) { |
5669 | PERROR("snprintf 64-bit consumer error socket path"); | |
5670 | retval = -1; | |
5671 | goto exit_init_data; | |
5672 | } | |
5673 | ret = snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5674 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5675 | if (ret < 0) { |
5676 | PERROR("snprintf 64-bit consumer command socket path"); | |
5677 | retval = -1; | |
5678 | goto exit_init_data; | |
5679 | } | |
67e40797 DG |
5680 | |
5681 | DBG2("UST consumer 64 bits err path: %s", | |
5682 | ustconsumer64_data.err_unix_sock_path); | |
5683 | DBG2("UST consumer 64 bits cmd path: %s", | |
5684 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 5685 | |
273ea72c | 5686 | /* |
7d8234d9 | 5687 | * See if daemon already exist. |
fac6795d | 5688 | */ |
4a15001e | 5689 | if (check_existing_daemon()) { |
75462a81 | 5690 | ERR("Already running daemon.\n"); |
273ea72c | 5691 | /* |
cf3af59e MD |
5692 | * We do not goto exit because we must not cleanup() |
5693 | * because a daemon is already running. | |
ab118b20 | 5694 | */ |
4a15001e MD |
5695 | retval = -1; |
5696 | goto exit_init_data; | |
a88df331 DG |
5697 | } |
5698 | ||
1427f9b2 DG |
5699 | /* |
5700 | * Init UST app hash table. Alloc hash table before this point since | |
5701 | * cleanup() can get called after that point. | |
5702 | */ | |
4a15001e | 5703 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 5704 | ERR("Failed to allocate UST app hash table"); |
4a15001e MD |
5705 | retval = -1; |
5706 | goto exit_init_data; | |
5707 | } | |
1427f9b2 | 5708 | |
6a4e4039 JG |
5709 | /* |
5710 | * Initialize agent app hash table. We allocate the hash table here | |
5711 | * since cleanup() can get called after this point. | |
5712 | */ | |
5713 | if (agent_app_ht_alloc()) { | |
5714 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e MD |
5715 | retval = -1; |
5716 | goto exit_init_data; | |
f20baf8e DG |
5717 | } |
5718 | ||
a88df331 DG |
5719 | /* |
5720 | * These actions must be executed as root. We do that *after* setting up | |
5721 | * the sockets path because we MUST make the check for another daemon using | |
5722 | * those paths *before* trying to set the kernel consumer sockets and init | |
5723 | * kernel tracer. | |
5724 | */ | |
5725 | if (is_root) { | |
4a15001e MD |
5726 | if (set_consumer_sockets(&kconsumer_data, rundir)) { |
5727 | retval = -1; | |
5728 | goto exit_init_data; | |
7753dea8 MD |
5729 | } |
5730 | ||
a88df331 | 5731 | /* Setup kernel tracer */ |
4fba7219 DG |
5732 | if (!opt_no_kernel) { |
5733 | init_kernel_tracer(); | |
89588270 DG |
5734 | if (kernel_tracer_fd >= 0) { |
5735 | ret = syscall_init_table(); | |
5736 | if (ret < 0) { | |
4a15001e MD |
5737 | ERR("Unable to populate syscall table. " |
5738 | "Syscall tracing won't work " | |
5739 | "for this session daemon."); | |
89588270 | 5740 | } |
834978fd | 5741 | } |
4fba7219 | 5742 | } |
a88df331 DG |
5743 | |
5744 | /* Set ulimit for open files */ | |
5745 | set_ulimit(); | |
fac6795d | 5746 | } |
4063050c MD |
5747 | /* init lttng_fd tracking must be done after set_ulimit. */ |
5748 | lttng_fd_init(); | |
fac6795d | 5749 | |
4a15001e MD |
5750 | if (set_consumer_sockets(&ustconsumer64_data, rundir)) { |
5751 | retval = -1; | |
5752 | goto exit_init_data; | |
67e40797 DG |
5753 | } |
5754 | ||
4a15001e MD |
5755 | if (set_consumer_sockets(&ustconsumer32_data, rundir)) { |
5756 | retval = -1; | |
5757 | goto exit_init_data; | |
67e40797 DG |
5758 | } |
5759 | ||
d6f42150 | 5760 | /* Setup the needed unix socket */ |
4a15001e MD |
5761 | if (init_daemon_socket()) { |
5762 | retval = -1; | |
5763 | goto exit_init_data; | |
fac6795d DG |
5764 | } |
5765 | ||
5766 | /* Set credentials to socket */ | |
4a15001e MD |
5767 | if (is_root && set_permissions(rundir)) { |
5768 | retval = -1; | |
5769 | goto exit_init_data; | |
fac6795d DG |
5770 | } |
5771 | ||
5b8719f5 DG |
5772 | /* Get parent pid if -S, --sig-parent is specified. */ |
5773 | if (opt_sig_parent) { | |
5774 | ppid = getppid(); | |
5775 | } | |
5776 | ||
7a485870 | 5777 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 | 5778 | if (is_root && !opt_no_kernel) { |
4a15001e MD |
5779 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
5780 | retval = -1; | |
5781 | goto exit_init_data; | |
6620da75 | 5782 | } |
7a485870 DG |
5783 | } |
5784 | ||
099e26bd | 5785 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
5786 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
5787 | retval = -1; | |
5788 | goto exit_init_data; | |
099e26bd DG |
5789 | } |
5790 | ||
d0b96690 | 5791 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
5792 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
5793 | retval = -1; | |
5794 | goto exit_init_data; | |
d0b96690 DG |
5795 | } |
5796 | ||
7972aab2 DG |
5797 | /* Initialize global buffer per UID and PID registry. */ |
5798 | buffer_reg_init_uid_registry(); | |
5799 | buffer_reg_init_pid_registry(); | |
5800 | ||
099e26bd | 5801 | /* Init UST command queue. */ |
8bdee6e2 | 5802 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 5803 | |
273ea72c | 5804 | /* |
4a15001e MD |
5805 | * Get session list pointer. This pointer MUST NOT be free'd. This list |
5806 | * is statically declared in session.c | |
273ea72c | 5807 | */ |
54d01ffb | 5808 | session_list_ptr = session_get_list(); |
b5541356 | 5809 | |
2f77fc4b | 5810 | cmd_init(); |
00e2e675 | 5811 | |
ae9e45b3 DG |
5812 | /* Check for the application socket timeout env variable. */ |
5813 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
5814 | if (env_app_timeout) { | |
5815 | app_socket_timeout = atoi(env_app_timeout); | |
5816 | } else { | |
5817 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
5818 | } | |
5819 | ||
4a15001e MD |
5820 | ret = write_pidfile(); |
5821 | if (ret) { | |
5822 | ERR("Error in write_pidfile"); | |
5823 | retval = -1; | |
5824 | goto exit_init_data; | |
5825 | } | |
5826 | ret = write_agent_port(); | |
5827 | if (ret) { | |
5828 | ERR("Error in write_agent_port"); | |
5829 | retval = -1; | |
5830 | goto exit_init_data; | |
5831 | } | |
35f90c40 | 5832 | |
554831e7 MD |
5833 | /* Initialize communication library */ |
5834 | lttcomm_init(); | |
4a15001e | 5835 | /* Initialize TCP timeout values */ |
d831c249 | 5836 | lttcomm_inet_init(); |
554831e7 | 5837 | |
ef367a93 | 5838 | if (load_session_init_data(&load_info) < 0) { |
4a15001e MD |
5839 | retval = -1; |
5840 | goto exit_init_data; | |
ef367a93 JG |
5841 | } |
5842 | load_info->path = opt_load_session_path; | |
5843 | ||
d5b9fd2f | 5844 | /* Create health-check thread */ |
44a5e5eb DG |
5845 | ret = pthread_create(&health_thread, NULL, |
5846 | thread_manage_health, (void *) NULL); | |
4a15001e MD |
5847 | if (ret) { |
5848 | errno = ret; | |
44a5e5eb | 5849 | PERROR("pthread_create health"); |
4a15001e | 5850 | retval = -1; |
44a5e5eb DG |
5851 | goto exit_health; |
5852 | } | |
5853 | ||
cf3af59e | 5854 | /* Create thread to manage the client socket */ |
099e26bd DG |
5855 | ret = pthread_create(&client_thread, NULL, |
5856 | thread_manage_clients, (void *) NULL); | |
4a15001e MD |
5857 | if (ret) { |
5858 | errno = ret; | |
76d7553f | 5859 | PERROR("pthread_create clients"); |
4a15001e | 5860 | retval = -1; |
cf3af59e MD |
5861 | goto exit_client; |
5862 | } | |
fac6795d | 5863 | |
099e26bd DG |
5864 | /* Create thread to dispatch registration */ |
5865 | ret = pthread_create(&dispatch_thread, NULL, | |
5866 | thread_dispatch_ust_registration, (void *) NULL); | |
4a15001e MD |
5867 | if (ret) { |
5868 | errno = ret; | |
76d7553f | 5869 | PERROR("pthread_create dispatch"); |
4a15001e | 5870 | retval = -1; |
099e26bd DG |
5871 | goto exit_dispatch; |
5872 | } | |
5873 | ||
5874 | /* Create thread to manage application registration. */ | |
5875 | ret = pthread_create(®_apps_thread, NULL, | |
5876 | thread_registration_apps, (void *) NULL); | |
4a15001e MD |
5877 | if (ret) { |
5878 | errno = ret; | |
76d7553f | 5879 | PERROR("pthread_create registration"); |
4a15001e | 5880 | retval = -1; |
099e26bd DG |
5881 | goto exit_reg_apps; |
5882 | } | |
5883 | ||
cf3af59e | 5884 | /* Create thread to manage application socket */ |
54d01ffb DG |
5885 | ret = pthread_create(&apps_thread, NULL, |
5886 | thread_manage_apps, (void *) NULL); | |
4a15001e MD |
5887 | if (ret) { |
5888 | errno = ret; | |
d0b96690 | 5889 | PERROR("pthread_create apps"); |
4a15001e | 5890 | retval = -1; |
d0b96690 DG |
5891 | goto exit_apps; |
5892 | } | |
5893 | ||
5894 | /* Create thread to manage application notify socket */ | |
5895 | ret = pthread_create(&apps_notify_thread, NULL, | |
5896 | ust_thread_manage_notify, (void *) NULL); | |
4a15001e MD |
5897 | if (ret) { |
5898 | errno = ret; | |
f5c32ef1 | 5899 | PERROR("pthread_create notify"); |
4a15001e | 5900 | retval = -1; |
9563b0ad | 5901 | goto exit_apps_notify; |
cf3af59e | 5902 | } |
fac6795d | 5903 | |
022d91ba DG |
5904 | /* Create agent registration thread. */ |
5905 | ret = pthread_create(&agent_reg_thread, NULL, | |
5906 | agent_thread_manage_registration, (void *) NULL); | |
4a15001e MD |
5907 | if (ret) { |
5908 | errno = ret; | |
022d91ba | 5909 | PERROR("pthread_create agent"); |
4a15001e | 5910 | retval = -1; |
022d91ba | 5911 | goto exit_agent_reg; |
4d076222 DG |
5912 | } |
5913 | ||
6620da75 DG |
5914 | /* Don't start this thread if kernel tracing is not requested nor root */ |
5915 | if (is_root && !opt_no_kernel) { | |
5916 | /* Create kernel thread to manage kernel event */ | |
5917 | ret = pthread_create(&kernel_thread, NULL, | |
5918 | thread_manage_kernel, (void *) NULL); | |
4a15001e MD |
5919 | if (ret) { |
5920 | errno = ret; | |
6620da75 | 5921 | PERROR("pthread_create kernel"); |
4a15001e | 5922 | retval = -1; |
6620da75 DG |
5923 | goto exit_kernel; |
5924 | } | |
ef367a93 | 5925 | } |
7a485870 | 5926 | |
4a15001e MD |
5927 | /* Create session loading thread. */ |
5928 | ret = pthread_create(&load_session_thread, NULL, thread_load_session, | |
5929 | load_info); | |
5930 | if (ret) { | |
5931 | errno = ret; | |
5932 | PERROR("pthread_create load_session_thread"); | |
5933 | retval = -1; | |
5934 | goto exit_load_session; | |
5935 | } | |
5936 | ||
5937 | /* | |
5938 | * This is where we start awaiting program completion (e.g. through | |
5939 | * signal that asks threads to teardown). | |
5940 | */ | |
5941 | ||
5942 | ret = pthread_join(load_session_thread, &status); | |
5943 | if (ret) { | |
5944 | errno = ret; | |
5945 | PERROR("pthread_join load_session_thread"); | |
5946 | retval = -1; | |
5947 | } | |
5948 | exit_load_session: | |
ef367a93 JG |
5949 | |
5950 | if (is_root && !opt_no_kernel) { | |
6620da75 | 5951 | ret = pthread_join(kernel_thread, &status); |
4a15001e MD |
5952 | if (ret) { |
5953 | errno = ret; | |
6620da75 | 5954 | PERROR("pthread_join"); |
4a15001e | 5955 | retval = -1; |
6620da75 | 5956 | } |
fac6795d | 5957 | } |
cf3af59e | 5958 | exit_kernel: |
4a15001e | 5959 | |
022d91ba | 5960 | ret = pthread_join(agent_reg_thread, &status); |
4a15001e MD |
5961 | if (ret) { |
5962 | errno = ret; | |
022d91ba | 5963 | PERROR("pthread_join agent"); |
4a15001e | 5964 | retval = -1; |
4d076222 | 5965 | } |
022d91ba | 5966 | exit_agent_reg: |
4a15001e | 5967 | |
9563b0ad | 5968 | ret = pthread_join(apps_notify_thread, &status); |
4a15001e MD |
5969 | if (ret) { |
5970 | errno = ret; | |
9563b0ad | 5971 | PERROR("pthread_join apps notify"); |
4a15001e | 5972 | retval = -1; |
9563b0ad | 5973 | } |
9563b0ad | 5974 | exit_apps_notify: |
4a15001e | 5975 | |
cf3af59e | 5976 | ret = pthread_join(apps_thread, &status); |
4a15001e MD |
5977 | if (ret) { |
5978 | errno = ret; | |
9563b0ad | 5979 | PERROR("pthread_join apps"); |
4a15001e | 5980 | retval = -1; |
cf3af59e | 5981 | } |
cf3af59e | 5982 | exit_apps: |
4a15001e | 5983 | |
099e26bd | 5984 | ret = pthread_join(reg_apps_thread, &status); |
4a15001e MD |
5985 | if (ret) { |
5986 | errno = ret; | |
76d7553f | 5987 | PERROR("pthread_join"); |
4a15001e | 5988 | retval = -1; |
099e26bd | 5989 | } |
099e26bd | 5990 | exit_reg_apps: |
4a15001e | 5991 | |
772b8f4d MD |
5992 | /* |
5993 | * Join dispatch thread after joining reg_apps_thread to ensure | |
5994 | * we don't leak applications in the queue. | |
5995 | */ | |
099e26bd | 5996 | ret = pthread_join(dispatch_thread, &status); |
4a15001e MD |
5997 | if (ret) { |
5998 | errno = ret; | |
76d7553f | 5999 | PERROR("pthread_join"); |
4a15001e | 6000 | retval = -1; |
099e26bd | 6001 | } |
099e26bd | 6002 | exit_dispatch: |
4a15001e | 6003 | |
cf3af59e | 6004 | ret = pthread_join(client_thread, &status); |
4a15001e MD |
6005 | if (ret) { |
6006 | errno = ret; | |
76d7553f | 6007 | PERROR("pthread_join"); |
4a15001e | 6008 | retval = -1; |
cf3af59e | 6009 | } |
4a15001e | 6010 | exit_client: |
a88df331 | 6011 | |
4a15001e MD |
6012 | ret = pthread_join(health_thread, &status); |
6013 | if (ret) { | |
6014 | errno = ret; | |
6015 | PERROR("pthread_join health thread"); | |
6016 | retval = -1; | |
06f525de | 6017 | } |
4a15001e | 6018 | exit_health: |
06f525de | 6019 | |
4a15001e MD |
6020 | exit_init_data: |
6021 | /* | |
6022 | * sessiond_cleanup() is called when no other thread is running, except | |
6023 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
6024 | */ | |
6025 | rcu_thread_online(); | |
6026 | sessiond_cleanup(); | |
6027 | rcu_thread_offline(); | |
6028 | rcu_unregister_thread(); | |
06f525de | 6029 | |
4a15001e MD |
6030 | ret = notify_thread_pipe(ht_cleanup_quit_pipe[1]); |
6031 | if (ret < 0) { | |
6032 | ERR("write error on ht_cleanup quit pipe"); | |
6033 | retval = -1; | |
06f525de DG |
6034 | } |
6035 | ||
0b2dc8df | 6036 | ret = pthread_join(ht_cleanup_thread, &status); |
4a15001e MD |
6037 | if (ret) { |
6038 | errno = ret; | |
0b2dc8df | 6039 | PERROR("pthread_join ht cleanup thread"); |
4a15001e | 6040 | retval = -1; |
0b2dc8df MD |
6041 | } |
6042 | exit_ht_cleanup: | |
25b397f9 | 6043 | exit_set_max_size: |
4a15001e MD |
6044 | |
6045 | utils_close_pipe(ht_cleanup_pipe); | |
6046 | exit_ht_cleanup_pipe: | |
6047 | ||
cf3af59e | 6048 | /* |
4a15001e | 6049 | * Close the ht_cleanup quit pipe. |
cf3af59e | 6050 | */ |
4a15001e MD |
6051 | utils_close_pipe(ht_cleanup_quit_pipe); |
6052 | exit_ht_cleanup_quit_pipe: | |
6053 | ||
6054 | health_app_destroy(health_sessiond); | |
6055 | exit_health_sessiond_cleanup: | |
6056 | ||
6057 | exit_options: | |
6058 | sessiond_cleanup_options(); | |
6059 | ||
6060 | exit_set_signal_handler: | |
6061 | if (!retval) { | |
cf3af59e | 6062 | exit(EXIT_SUCCESS); |
4a15001e MD |
6063 | } else { |
6064 | exit(EXIT_FAILURE); | |
67e40797 | 6065 | } |
fac6795d | 6066 | } |