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" |
fac6795d | 76 | |
ebaeda94 MD |
77 | #define CONSUMERD_FILE "lttng-consumerd" |
78 | ||
fac6795d | 79 | const char *progname; |
6c71277b | 80 | static const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
26296c48 JG |
81 | static int tracing_group_name_override; |
82 | static char *opt_pidfile; | |
5b8719f5 | 83 | static int opt_sig_parent; |
97e19046 | 84 | static int opt_verbose_consumer; |
72dd7491 | 85 | static int opt_daemon, opt_background; |
4fba7219 | 86 | static int opt_no_kernel; |
ef367a93 | 87 | static char *opt_load_session_path; |
1d4b027a | 88 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
0bb7724a | 89 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ |
67e40797 | 90 | static char *rundir; |
c9cb3e7d | 91 | static int lockfile_fd = -1; |
3bd1e081 | 92 | |
0bb7724a DG |
93 | /* Set to 1 when a SIGUSR1 signal is received. */ |
94 | static int recv_child_signal; | |
95 | ||
a23ec3a7 DG |
96 | /* |
97 | * Consumer daemon specific control data. Every value not initialized here is | |
98 | * set to 0 by the static definition. | |
99 | */ | |
3bd1e081 MD |
100 | static struct consumer_data kconsumer_data = { |
101 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
102 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
103 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
03550b58 MD |
104 | .err_sock = -1, |
105 | .cmd_sock = -1, | |
173af62f DG |
106 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
107 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
108 | .cond = PTHREAD_COND_INITIALIZER, |
109 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 110 | }; |
7753dea8 MD |
111 | static struct consumer_data ustconsumer64_data = { |
112 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
113 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
114 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
115 | .err_sock = -1, |
116 | .cmd_sock = -1, | |
173af62f DG |
117 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
118 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
119 | .cond = PTHREAD_COND_INITIALIZER, |
120 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
121 | }; |
122 | static struct consumer_data ustconsumer32_data = { | |
123 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
124 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
125 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
126 | .err_sock = -1, |
127 | .cmd_sock = -1, | |
173af62f DG |
128 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
129 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
130 | .cond = PTHREAD_COND_INITIALIZER, |
131 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
132 | }; |
133 | ||
26296c48 JG |
134 | /* Command line options */ |
135 | static const struct option long_options[] = { | |
4731a947 JG |
136 | { "client-sock", required_argument, 0, 'c' }, |
137 | { "apps-sock", required_argument, 0, 'a' }, | |
138 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
139 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
140 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
141 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
142 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
143 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
144 | { "consumerd32-path", required_argument, 0, '\0' }, | |
145 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
146 | { "consumerd64-path", required_argument, 0, '\0' }, | |
147 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
148 | { "daemonize", no_argument, 0, 'd' }, | |
149 | { "background", no_argument, 0, 'b' }, | |
150 | { "sig-parent", no_argument, 0, 'S' }, | |
151 | { "help", no_argument, 0, 'h' }, | |
152 | { "group", required_argument, 0, 'g' }, | |
153 | { "version", no_argument, 0, 'V' }, | |
154 | { "quiet", no_argument, 0, 'q' }, | |
155 | { "verbose", no_argument, 0, 'v' }, | |
156 | { "verbose-consumer", no_argument, 0, '\0' }, | |
157 | { "no-kernel", no_argument, 0, '\0' }, | |
158 | { "pidfile", required_argument, 0, 'p' }, | |
159 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
160 | { "config", required_argument, 0, 'f' }, | |
161 | { "load", required_argument, 0, 'l' }, | |
162 | { "kmod-probes", required_argument, 0, '\0' }, | |
163 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
26296c48 JG |
164 | { NULL, 0, 0, 0 } |
165 | }; | |
166 | ||
167 | /* Command line options to ignore from configuration file */ | |
168 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
169 | ||
26c9d55e | 170 | /* Shared between threads */ |
099e26bd | 171 | static int dispatch_thread_exit; |
fac6795d | 172 | |
54d01ffb DG |
173 | /* Global application Unix socket path */ |
174 | static char apps_unix_sock_path[PATH_MAX]; | |
175 | /* Global client Unix socket path */ | |
176 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
177 | /* global wait shm path for UST */ |
178 | static char wait_shm_path[PATH_MAX]; | |
44a5e5eb DG |
179 | /* Global health check unix path */ |
180 | static char health_unix_sock_path[PATH_MAX]; | |
fac6795d | 181 | |
1d4b027a | 182 | /* Sockets and FDs */ |
a4b35e07 MD |
183 | static int client_sock = -1; |
184 | static int apps_sock = -1; | |
2f77fc4b | 185 | int kernel_tracer_fd = -1; |
76d7553f | 186 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 187 | |
273ea72c DG |
188 | /* |
189 | * Quit pipe for all threads. This permits a single cancellation point | |
190 | * for all threads when receiving an event on the pipe. | |
191 | */ | |
76d7553f | 192 | static int thread_quit_pipe[2] = { -1, -1 }; |
4a15001e | 193 | static int ht_cleanup_quit_pipe[2] = { -1, -1 }; |
273ea72c | 194 | |
099e26bd DG |
195 | /* |
196 | * This pipe is used to inform the thread managing application communication | |
197 | * that a command is queued and ready to be processed. | |
198 | */ | |
76d7553f | 199 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 200 | |
d0b96690 DG |
201 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
202 | ||
1d4b027a | 203 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 204 | static pthread_t apps_thread; |
d0b96690 | 205 | static pthread_t apps_notify_thread; |
099e26bd | 206 | static pthread_t reg_apps_thread; |
1d4b027a | 207 | static pthread_t client_thread; |
7a485870 | 208 | static pthread_t kernel_thread; |
099e26bd | 209 | static pthread_t dispatch_thread; |
44a5e5eb | 210 | static pthread_t health_thread; |
0b2dc8df | 211 | static pthread_t ht_cleanup_thread; |
022d91ba | 212 | static pthread_t agent_reg_thread; |
ef367a93 | 213 | static pthread_t load_session_thread; |
5eb91c98 | 214 | |
099e26bd DG |
215 | /* |
216 | * UST registration command queue. This queue is tied with a futex and uses a N | |
217 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
218 | * | |
b22c5da8 DG |
219 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
220 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
221 | * the line new application socket and monitors it for any I/O error or clean | |
222 | * close that triggers an unregistration of the application. | |
099e26bd DG |
223 | */ |
224 | static struct ust_cmd_queue ust_cmd_queue; | |
225 | ||
b5541356 DG |
226 | /* |
227 | * Pointer initialized before thread creation. | |
228 | * | |
229 | * This points to the tracing session list containing the session count and a | |
230 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
231 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 232 | * |
d063d709 | 233 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 234 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
235 | */ |
236 | static struct ltt_session_list *session_list_ptr; | |
237 | ||
7753dea8 MD |
238 | int ust_consumerd64_fd = -1; |
239 | int ust_consumerd32_fd = -1; | |
240 | ||
fb6f1fa2 YB |
241 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
242 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
243 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
244 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
26296c48 JG |
245 | static int consumerd32_bin_override; |
246 | static int consumerd64_bin_override; | |
247 | static int consumerd32_libdir_override; | |
248 | static int consumerd64_libdir_override; | |
fb09408a | 249 | |
2f77fc4b DG |
250 | static const char *module_proc_lttng = "/proc/lttng"; |
251 | ||
5c827ce0 DG |
252 | /* |
253 | * Consumer daemon state which is changed when spawning it, killing it or in | |
254 | * case of a fatal error. | |
255 | */ | |
256 | enum consumerd_state { | |
257 | CONSUMER_STARTED = 1, | |
258 | CONSUMER_STOPPED = 2, | |
259 | CONSUMER_ERROR = 3, | |
260 | }; | |
261 | ||
262 | /* | |
263 | * This consumer daemon state is used to validate if a client command will be | |
264 | * able to reach the consumer. If not, the client is informed. For instance, | |
265 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
266 | * error to the client. | |
267 | * | |
268 | * The following example shows a possible race condition of this scheme: | |
269 | * | |
270 | * consumer thread error happens | |
271 | * client cmd arrives | |
272 | * client cmd checks state -> still OK | |
273 | * consumer thread exit, sets error | |
274 | * client cmd try to talk to consumer | |
275 | * ... | |
276 | * | |
277 | * However, since the consumer is a different daemon, we have no way of making | |
278 | * sure the command will reach it safely even with this state flag. This is why | |
279 | * we consider that up to the state validation during command processing, the | |
280 | * command is safe. After that, we can not guarantee the correctness of the | |
281 | * client request vis-a-vis the consumer. | |
282 | */ | |
283 | static enum consumerd_state ust_consumerd_state; | |
284 | static enum consumerd_state kernel_consumerd_state; | |
285 | ||
ae9e45b3 DG |
286 | /* |
287 | * Socket timeout for receiving and sending in seconds. | |
288 | */ | |
289 | static int app_socket_timeout; | |
290 | ||
12744796 DG |
291 | /* Set in main() with the current page size. */ |
292 | long page_size; | |
293 | ||
8782cc74 MD |
294 | /* Application health monitoring */ |
295 | struct health_app *health_sessiond; | |
296 | ||
022d91ba DG |
297 | /* Agent TCP port for registration. Used by the agent thread. */ |
298 | unsigned int agent_tcp_port = DEFAULT_AGENT_TCP_PORT; | |
4d076222 | 299 | |
f43f95a9 DG |
300 | /* Am I root or not. */ |
301 | int is_root; /* Set to 1 if the daemon is running as root */ | |
302 | ||
26296c48 JG |
303 | const char * const config_section_name = "sessiond"; |
304 | ||
ef367a93 JG |
305 | /* Load session thread information to operate. */ |
306 | struct load_session_thread_data *load_info; | |
307 | ||
97bc1426 MD |
308 | /* |
309 | * Whether sessiond is ready for commands/health check requests. | |
310 | * NR_LTTNG_SESSIOND_READY must match the number of calls to | |
ef367a93 | 311 | * sessiond_notify_ready(). |
97bc1426 | 312 | */ |
ef367a93 | 313 | #define NR_LTTNG_SESSIOND_READY 3 |
97bc1426 MD |
314 | int lttng_sessiond_ready = NR_LTTNG_SESSIOND_READY; |
315 | ||
316 | /* Notify parents that we are ready for cmd and health check */ | |
ef367a93 JG |
317 | LTTNG_HIDDEN |
318 | void sessiond_notify_ready(void) | |
97bc1426 MD |
319 | { |
320 | if (uatomic_sub_return(<tng_sessiond_ready, 1) == 0) { | |
321 | /* | |
322 | * Notify parent pid that we are ready to accept command | |
323 | * for client side. This ppid is the one from the | |
324 | * external process that spawned us. | |
325 | */ | |
326 | if (opt_sig_parent) { | |
327 | kill(ppid, SIGUSR1); | |
328 | } | |
329 | ||
330 | /* | |
331 | * Notify the parent of the fork() process that we are | |
332 | * ready. | |
333 | */ | |
72dd7491 | 334 | if (opt_daemon || opt_background) { |
97bc1426 MD |
335 | kill(child_ppid, SIGUSR1); |
336 | } | |
337 | } | |
338 | } | |
339 | ||
fb09408a | 340 | static |
7753dea8 | 341 | void setup_consumerd_path(void) |
fb09408a | 342 | { |
fc7a59ce | 343 | const char *bin, *libdir; |
fb09408a | 344 | |
7753dea8 MD |
345 | /* |
346 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
347 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
348 | * has not been defined. | |
7753dea8 | 349 | */ |
ebaeda94 | 350 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
351 | if (!consumerd32_bin[0]) { |
352 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
353 | } |
354 | if (!consumerd32_libdir[0]) { | |
355 | consumerd32_libdir = INSTALL_LIB_PATH; | |
356 | } | |
357 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
358 | if (!consumerd64_bin[0]) { |
359 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 360 | } |
ebaeda94 MD |
361 | if (!consumerd64_libdir[0]) { |
362 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
363 | } |
364 | #else | |
365 | #error "Unknown bitness" | |
366 | #endif | |
367 | ||
fb09408a MD |
368 | /* |
369 | * runtime env. var. overrides the build default. | |
370 | */ | |
e8fa9fb0 | 371 | bin = lttng_secure_getenv("LTTNG_CONSUMERD32_BIN"); |
fc7a59ce AM |
372 | if (bin) { |
373 | consumerd32_bin = bin; | |
7753dea8 | 374 | } |
e8fa9fb0 | 375 | bin = lttng_secure_getenv("LTTNG_CONSUMERD64_BIN"); |
fc7a59ce AM |
376 | if (bin) { |
377 | consumerd64_bin = bin; | |
ebaeda94 | 378 | } |
e8fa9fb0 | 379 | libdir = lttng_secure_getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
380 | if (libdir) { |
381 | consumerd32_libdir = libdir; | |
382 | } | |
e8fa9fb0 | 383 | libdir = lttng_secure_getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
384 | if (libdir) { |
385 | consumerd64_libdir = libdir; | |
fb09408a MD |
386 | } |
387 | } | |
388 | ||
4a15001e MD |
389 | static |
390 | int __sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size, | |
391 | int *a_pipe) | |
5eb91c98 DG |
392 | { |
393 | int ret; | |
394 | ||
d0b96690 | 395 | assert(events); |
5eb91c98 DG |
396 | |
397 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
398 | if (ret < 0) { | |
399 | goto error; | |
400 | } | |
401 | ||
402 | /* Add quit pipe */ | |
4a15001e | 403 | ret = lttng_poll_add(events, a_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
404 | if (ret < 0) { |
405 | goto error; | |
406 | } | |
407 | ||
408 | return 0; | |
409 | ||
410 | error: | |
411 | return ret; | |
412 | } | |
413 | ||
4a15001e MD |
414 | /* |
415 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
416 | */ | |
417 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) | |
418 | { | |
419 | return __sessiond_set_thread_pollset(events, size, thread_quit_pipe); | |
420 | } | |
421 | ||
422 | /* | |
423 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
424 | */ | |
425 | int sessiond_set_ht_cleanup_thread_pollset(struct lttng_poll_event *events, | |
426 | size_t size) | |
427 | { | |
428 | return __sessiond_set_thread_pollset(events, size, | |
429 | ht_cleanup_quit_pipe); | |
430 | } | |
431 | ||
432 | static | |
433 | int __sessiond_check_thread_quit_pipe(int fd, uint32_t events, int a_pipe) | |
434 | { | |
435 | if (fd == a_pipe && (events & LPOLLIN)) { | |
436 | return 1; | |
437 | } | |
438 | return 0; | |
439 | } | |
440 | ||
5eb91c98 DG |
441 | /* |
442 | * Check if the thread quit pipe was triggered. | |
443 | * | |
444 | * Return 1 if it was triggered else 0; | |
445 | */ | |
d0b96690 | 446 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
5eb91c98 | 447 | { |
4a15001e MD |
448 | return __sessiond_check_thread_quit_pipe(fd, events, |
449 | thread_quit_pipe[0]); | |
450 | } | |
5eb91c98 | 451 | |
4a15001e MD |
452 | /* |
453 | * Check if the ht_cleanup thread quit pipe was triggered. | |
454 | * | |
455 | * Return 1 if it was triggered else 0; | |
456 | */ | |
457 | int sessiond_check_ht_cleanup_quit(int fd, uint32_t events) | |
458 | { | |
459 | return __sessiond_check_thread_quit_pipe(fd, events, | |
460 | ht_cleanup_quit_pipe[0]); | |
5eb91c98 DG |
461 | } |
462 | ||
273ea72c | 463 | /* |
5eb91c98 | 464 | * Init thread quit pipe. |
273ea72c DG |
465 | * |
466 | * Return -1 on error or 0 if all pipes are created. | |
467 | */ | |
4a15001e | 468 | static int __init_thread_quit_pipe(int *a_pipe) |
273ea72c | 469 | { |
730389d9 | 470 | int ret, i; |
273ea72c | 471 | |
4a15001e | 472 | ret = pipe(a_pipe); |
273ea72c | 473 | if (ret < 0) { |
730389d9 | 474 | PERROR("thread quit pipe"); |
273ea72c DG |
475 | goto error; |
476 | } | |
477 | ||
730389d9 | 478 | for (i = 0; i < 2; i++) { |
4a15001e | 479 | ret = fcntl(a_pipe[i], F_SETFD, FD_CLOEXEC); |
730389d9 DG |
480 | if (ret < 0) { |
481 | PERROR("fcntl"); | |
482 | goto error; | |
483 | } | |
484 | } | |
485 | ||
273ea72c DG |
486 | error: |
487 | return ret; | |
488 | } | |
489 | ||
4a15001e MD |
490 | static int init_thread_quit_pipe(void) |
491 | { | |
492 | return __init_thread_quit_pipe(thread_quit_pipe); | |
493 | } | |
494 | ||
495 | static int init_ht_cleanup_quit_pipe(void) | |
496 | { | |
497 | return __init_thread_quit_pipe(ht_cleanup_quit_pipe); | |
498 | } | |
499 | ||
099e26bd DG |
500 | /* |
501 | * Stop all threads by closing the thread quit pipe. | |
502 | */ | |
cf3af59e MD |
503 | static void stop_threads(void) |
504 | { | |
5eb91c98 DG |
505 | int ret; |
506 | ||
cf3af59e MD |
507 | /* Stopping all threads */ |
508 | DBG("Terminating all threads"); | |
54d01ffb | 509 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
510 | if (ret < 0) { |
511 | ERR("write error on thread quit pipe"); | |
512 | } | |
513 | ||
099e26bd | 514 | /* Dispatch thread */ |
26c9d55e | 515 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 516 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
517 | } |
518 | ||
e975f9f8 DG |
519 | /* |
520 | * Close every consumer sockets. | |
521 | */ | |
522 | static void close_consumer_sockets(void) | |
523 | { | |
524 | int ret; | |
525 | ||
526 | if (kconsumer_data.err_sock >= 0) { | |
527 | ret = close(kconsumer_data.err_sock); | |
528 | if (ret < 0) { | |
529 | PERROR("kernel consumer err_sock close"); | |
530 | } | |
531 | } | |
532 | if (ustconsumer32_data.err_sock >= 0) { | |
533 | ret = close(ustconsumer32_data.err_sock); | |
534 | if (ret < 0) { | |
a76cbd9f | 535 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
536 | } |
537 | } | |
538 | if (ustconsumer64_data.err_sock >= 0) { | |
539 | ret = close(ustconsumer64_data.err_sock); | |
540 | if (ret < 0) { | |
a76cbd9f | 541 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
542 | } |
543 | } | |
544 | if (kconsumer_data.cmd_sock >= 0) { | |
545 | ret = close(kconsumer_data.cmd_sock); | |
546 | if (ret < 0) { | |
547 | PERROR("kernel consumer cmd_sock close"); | |
548 | } | |
549 | } | |
550 | if (ustconsumer32_data.cmd_sock >= 0) { | |
551 | ret = close(ustconsumer32_data.cmd_sock); | |
552 | if (ret < 0) { | |
a76cbd9f | 553 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
554 | } |
555 | } | |
556 | if (ustconsumer64_data.cmd_sock >= 0) { | |
557 | ret = close(ustconsumer64_data.cmd_sock); | |
558 | if (ret < 0) { | |
a76cbd9f | 559 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
560 | } |
561 | } | |
562 | } | |
563 | ||
c9cb3e7d JG |
564 | /* |
565 | * Generate the full lock file path using the rundir. | |
566 | * | |
567 | * Return the snprintf() return value thus a negative value is an error. | |
568 | */ | |
569 | static int generate_lock_file_path(char *path, size_t len) | |
570 | { | |
571 | int ret; | |
572 | ||
573 | assert(path); | |
574 | assert(rundir); | |
575 | ||
576 | /* Build lockfile path from rundir. */ | |
577 | ret = snprintf(path, len, "%s/" DEFAULT_LTTNG_SESSIOND_LOCKFILE, rundir); | |
578 | if (ret < 0) { | |
579 | PERROR("snprintf lockfile path"); | |
580 | } | |
581 | ||
582 | return ret; | |
583 | } | |
584 | ||
fac6795d | 585 | /* |
4a15001e | 586 | * Cleanup the session daemon's data structures. |
fac6795d | 587 | */ |
4a15001e | 588 | static void sessiond_cleanup(void) |
fac6795d | 589 | { |
ef599319 | 590 | int ret; |
af9737e9 | 591 | struct ltt_session *sess, *stmp; |
8c6c56c2 | 592 | char path[PATH_MAX]; |
fac6795d | 593 | |
4a15001e | 594 | DBG("Cleanup sessiond"); |
e07ae692 | 595 | |
4e449f3f MD |
596 | /* |
597 | * Close the thread quit pipe. It has already done its job, | |
598 | * since we are now called. | |
599 | */ | |
2f77fc4b DG |
600 | utils_close_pipe(thread_quit_pipe); |
601 | ||
35f90c40 DG |
602 | /* |
603 | * If opt_pidfile is undefined, the default file will be wiped when | |
604 | * removing the rundir. | |
605 | */ | |
606 | if (opt_pidfile) { | |
607 | ret = remove(opt_pidfile); | |
608 | if (ret < 0) { | |
609 | PERROR("remove pidfile %s", opt_pidfile); | |
610 | } | |
611 | } | |
612 | ||
8c6c56c2 MD |
613 | DBG("Removing sessiond and consumerd content of directory %s", rundir); |
614 | ||
615 | /* sessiond */ | |
616 | snprintf(path, PATH_MAX, | |
617 | "%s/%s", | |
618 | rundir, DEFAULT_LTTNG_SESSIOND_PIDFILE); | |
619 | DBG("Removing %s", path); | |
620 | (void) unlink(path); | |
621 | ||
cd9290dd | 622 | snprintf(path, PATH_MAX, "%s/%s", rundir, |
022d91ba | 623 | DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE); |
cd9290dd DG |
624 | DBG("Removing %s", path); |
625 | (void) unlink(path); | |
626 | ||
8c6c56c2 MD |
627 | /* kconsumerd */ |
628 | snprintf(path, PATH_MAX, | |
629 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, | |
630 | rundir); | |
631 | DBG("Removing %s", path); | |
632 | (void) unlink(path); | |
633 | ||
634 | snprintf(path, PATH_MAX, | |
635 | DEFAULT_KCONSUMERD_PATH, | |
636 | rundir); | |
637 | DBG("Removing directory %s", path); | |
638 | (void) rmdir(path); | |
639 | ||
640 | /* ust consumerd 32 */ | |
641 | snprintf(path, PATH_MAX, | |
642 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, | |
643 | rundir); | |
644 | DBG("Removing %s", path); | |
645 | (void) unlink(path); | |
646 | ||
647 | snprintf(path, PATH_MAX, | |
648 | DEFAULT_USTCONSUMERD32_PATH, | |
649 | rundir); | |
650 | DBG("Removing directory %s", path); | |
651 | (void) rmdir(path); | |
652 | ||
653 | /* ust consumerd 64 */ | |
654 | snprintf(path, PATH_MAX, | |
655 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, | |
656 | rundir); | |
657 | DBG("Removing %s", path); | |
658 | (void) unlink(path); | |
659 | ||
660 | snprintf(path, PATH_MAX, | |
661 | DEFAULT_USTCONSUMERD64_PATH, | |
662 | rundir); | |
663 | DBG("Removing directory %s", path); | |
664 | (void) rmdir(path); | |
5461b305 | 665 | |
99bab54f | 666 | DBG("Cleaning up all sessions"); |
fac6795d | 667 | |
b5541356 | 668 | /* Destroy session list mutex */ |
273ea72c DG |
669 | if (session_list_ptr != NULL) { |
670 | pthread_mutex_destroy(&session_list_ptr->lock); | |
671 | ||
672 | /* Cleanup ALL session */ | |
54d01ffb DG |
673 | cds_list_for_each_entry_safe(sess, stmp, |
674 | &session_list_ptr->head, list) { | |
2f77fc4b | 675 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
676 | } |
677 | } | |
678 | ||
5642e70b JG |
679 | DBG("Cleaning up all agent apps"); |
680 | agent_app_ht_clean(); | |
681 | ||
099e26bd | 682 | DBG("Closing all UST sockets"); |
56fff090 | 683 | ust_app_clean_list(); |
7972aab2 | 684 | buffer_reg_destroy_registries(); |
099e26bd | 685 | |
4fba7219 DG |
686 | if (is_root && !opt_no_kernel) { |
687 | DBG2("Closing kernel fd"); | |
a4b35e07 | 688 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
689 | ret = close(kernel_tracer_fd); |
690 | if (ret) { | |
691 | PERROR("close"); | |
692 | } | |
a4b35e07 | 693 | } |
2f50c8a3 | 694 | DBG("Unloading kernel modules"); |
096102bd | 695 | modprobe_remove_lttng_all(); |
834978fd | 696 | free(syscall_table); |
2f50c8a3 | 697 | } |
2f77fc4b | 698 | |
e975f9f8 DG |
699 | close_consumer_sockets(); |
700 | ||
ef367a93 JG |
701 | if (load_info) { |
702 | load_session_destroy_data(load_info); | |
703 | free(load_info); | |
704 | } | |
705 | ||
c9cb3e7d JG |
706 | /* |
707 | * Cleanup lock file by deleting it and finaly closing it which will | |
708 | * release the file system lock. | |
709 | */ | |
710 | if (lockfile_fd >= 0) { | |
711 | char lockfile_path[PATH_MAX]; | |
712 | ||
4a15001e MD |
713 | ret = generate_lock_file_path(lockfile_path, |
714 | sizeof(lockfile_path)); | |
c9cb3e7d JG |
715 | if (ret > 0) { |
716 | ret = remove(lockfile_path); | |
717 | if (ret < 0) { | |
718 | PERROR("remove lock file"); | |
719 | } | |
720 | ret = close(lockfile_fd); | |
721 | if (ret < 0) { | |
722 | PERROR("close lock file"); | |
723 | } | |
724 | } | |
725 | } | |
726 | ||
727 | /* | |
728 | * We do NOT rmdir rundir because there are other processes | |
729 | * using it, for instance lttng-relayd, which can start in | |
730 | * parallel with this teardown. | |
731 | */ | |
732 | ||
733 | free(rundir); | |
4a15001e MD |
734 | } |
735 | ||
736 | /* | |
737 | * Cleanup the daemon's option data structures. | |
738 | */ | |
739 | static void sessiond_cleanup_options(void) | |
740 | { | |
741 | DBG("Cleaning up options"); | |
742 | ||
743 | /* | |
744 | * If the override option is set, the pointer points to a *non* const | |
745 | * thus freeing it even though the variable type is set to const. | |
746 | */ | |
747 | if (tracing_group_name_override) { | |
748 | free((void *) tracing_group_name); | |
749 | } | |
750 | if (consumerd32_bin_override) { | |
751 | free((void *) consumerd32_bin); | |
752 | } | |
753 | if (consumerd64_bin_override) { | |
754 | free((void *) consumerd64_bin); | |
755 | } | |
756 | if (consumerd32_libdir_override) { | |
757 | free((void *) consumerd32_libdir); | |
758 | } | |
759 | if (consumerd64_libdir_override) { | |
760 | free((void *) consumerd64_libdir); | |
761 | } | |
762 | ||
763 | free(opt_pidfile); | |
764 | free(opt_load_session_path); | |
765 | free(kmod_probes_list); | |
766 | free(kmod_extra_probes_list); | |
c9cb3e7d | 767 | |
421cb601 | 768 | /* <fun> */ |
f56a39af | 769 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
770 | "Matthew, BEET driven development works!%c[%dm", |
771 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
772 | /* </fun> */ | |
fac6795d DG |
773 | } |
774 | ||
e065084a | 775 | /* |
d063d709 | 776 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 777 | * |
d063d709 | 778 | * Return lttcomm error code. |
e065084a DG |
779 | */ |
780 | static int send_unix_sock(int sock, void *buf, size_t len) | |
781 | { | |
782 | /* Check valid length */ | |
c617c0c6 | 783 | if (len == 0) { |
e065084a DG |
784 | return -1; |
785 | } | |
786 | ||
787 | return lttcomm_send_unix_sock(sock, buf, len); | |
788 | } | |
789 | ||
5461b305 | 790 | /* |
d063d709 | 791 | * Free memory of a command context structure. |
5461b305 | 792 | */ |
a2fb29a5 | 793 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 794 | { |
a2fb29a5 DG |
795 | DBG("Clean command context structure"); |
796 | if (*cmd_ctx) { | |
797 | if ((*cmd_ctx)->llm) { | |
798 | free((*cmd_ctx)->llm); | |
5461b305 | 799 | } |
a2fb29a5 DG |
800 | if ((*cmd_ctx)->lsm) { |
801 | free((*cmd_ctx)->lsm); | |
5461b305 | 802 | } |
a2fb29a5 DG |
803 | free(*cmd_ctx); |
804 | *cmd_ctx = NULL; | |
5461b305 DG |
805 | } |
806 | } | |
807 | ||
fac6795d | 808 | /* |
0fdd1e2c | 809 | * Notify UST applications using the shm mmap futex. |
fac6795d | 810 | */ |
0fdd1e2c | 811 | static int notify_ust_apps(int active) |
fac6795d | 812 | { |
0fdd1e2c | 813 | char *wait_shm_mmap; |
fac6795d | 814 | |
0fdd1e2c | 815 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 816 | |
0fdd1e2c DG |
817 | /* See shm.c for this call implying mmap, shm and futex calls */ |
818 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
819 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
820 | goto error; |
821 | } | |
822 | ||
0fdd1e2c DG |
823 | /* Wake waiting process */ |
824 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
825 | ||
826 | /* Apps notified successfully */ | |
827 | return 0; | |
fac6795d DG |
828 | |
829 | error: | |
0fdd1e2c | 830 | return -1; |
fac6795d DG |
831 | } |
832 | ||
e065084a | 833 | /* |
d063d709 DG |
834 | * Setup the outgoing data buffer for the response (llm) by allocating the |
835 | * right amount of memory and copying the original information from the lsm | |
836 | * structure. | |
ca95a216 | 837 | * |
d063d709 | 838 | * Return total size of the buffer pointed by buf. |
ca95a216 | 839 | */ |
5461b305 | 840 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 841 | { |
f3ed775e | 842 | int ret, buf_size; |
ca95a216 | 843 | |
f3ed775e | 844 | buf_size = size; |
5461b305 | 845 | |
ba7f0ae5 | 846 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 847 | if (cmd_ctx->llm == NULL) { |
76d7553f | 848 | PERROR("zmalloc"); |
5461b305 | 849 | ret = -ENOMEM; |
ca95a216 DG |
850 | goto error; |
851 | } | |
852 | ||
5461b305 DG |
853 | /* Copy common data */ |
854 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 855 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 856 | |
5461b305 DG |
857 | cmd_ctx->llm->data_size = size; |
858 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
859 | ||
ca95a216 DG |
860 | return buf_size; |
861 | ||
862 | error: | |
863 | return ret; | |
864 | } | |
865 | ||
7a485870 | 866 | /* |
5eb91c98 | 867 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 868 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 869 | */ |
5eb91c98 | 870 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 871 | { |
5eb91c98 | 872 | int ret; |
7a485870 DG |
873 | struct ltt_session *session; |
874 | struct ltt_kernel_channel *channel; | |
875 | ||
5eb91c98 | 876 | DBG("Updating kernel poll set"); |
7a485870 | 877 | |
54d01ffb | 878 | session_lock_list(); |
b5541356 | 879 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 880 | session_lock(session); |
7a485870 | 881 | if (session->kernel_session == NULL) { |
54d01ffb | 882 | session_unlock(session); |
7a485870 DG |
883 | continue; |
884 | } | |
7a485870 | 885 | |
54d01ffb DG |
886 | cds_list_for_each_entry(channel, |
887 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
888 | /* Add channel fd to the kernel poll set */ |
889 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
890 | if (ret < 0) { | |
54d01ffb | 891 | session_unlock(session); |
5eb91c98 DG |
892 | goto error; |
893 | } | |
894 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 895 | } |
54d01ffb | 896 | session_unlock(session); |
7a485870 | 897 | } |
54d01ffb | 898 | session_unlock_list(); |
7a485870 | 899 | |
5eb91c98 | 900 | return 0; |
7a485870 DG |
901 | |
902 | error: | |
54d01ffb | 903 | session_unlock_list(); |
7a485870 DG |
904 | return -1; |
905 | } | |
906 | ||
907 | /* | |
54d01ffb | 908 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 909 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 910 | * |
d063d709 | 911 | * Useful for CPU hotplug feature. |
7a485870 | 912 | */ |
2bdd86d4 | 913 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
914 | { |
915 | int ret = 0; | |
916 | struct ltt_session *session; | |
173af62f | 917 | struct ltt_kernel_session *ksess; |
7a485870 DG |
918 | struct ltt_kernel_channel *channel; |
919 | ||
920 | DBG("Updating kernel streams for channel fd %d", fd); | |
921 | ||
54d01ffb | 922 | session_lock_list(); |
b5541356 | 923 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 924 | session_lock(session); |
7a485870 | 925 | if (session->kernel_session == NULL) { |
54d01ffb | 926 | session_unlock(session); |
7a485870 DG |
927 | continue; |
928 | } | |
173af62f | 929 | ksess = session->kernel_session; |
d9800920 | 930 | |
4a15001e MD |
931 | cds_list_for_each_entry(channel, |
932 | &ksess->channel_list.head, list) { | |
933 | struct lttng_ht_iter iter; | |
934 | struct consumer_socket *socket; | |
d9800920 | 935 | |
4a15001e MD |
936 | if (channel->fd != fd) { |
937 | continue; | |
938 | } | |
939 | DBG("Channel found, updating kernel streams"); | |
940 | ret = kernel_open_channel_stream(channel); | |
941 | if (ret < 0) { | |
942 | goto error; | |
943 | } | |
944 | /* Update the stream global counter */ | |
945 | ksess->stream_count_global += ret; | |
946 | ||
947 | /* | |
948 | * Have we already sent fds to the consumer? If yes, it | |
949 | * means that tracing is started so it is safe to send | |
950 | * our updated stream fds. | |
951 | */ | |
952 | if (ksess->consumer_fds_sent != 1 | |
953 | || ksess->consumer == NULL) { | |
954 | ret = -1; | |
955 | goto error; | |
956 | } | |
957 | ||
958 | rcu_read_lock(); | |
959 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
960 | &iter.iter, socket, node.node) { | |
961 | pthread_mutex_lock(socket->lock); | |
962 | ret = kernel_consumer_send_channel_stream(socket, | |
963 | channel, ksess, | |
964 | session->output_traces ? 1 : 0); | |
965 | pthread_mutex_unlock(socket->lock); | |
966 | if (ret < 0) { | |
e7fe706f | 967 | rcu_read_unlock(); |
4a15001e | 968 | goto error; |
7a485870 | 969 | } |
7a485870 | 970 | } |
4a15001e | 971 | rcu_read_unlock(); |
7a485870 | 972 | } |
54d01ffb | 973 | session_unlock(session); |
7a485870 | 974 | } |
54d01ffb | 975 | session_unlock_list(); |
b3c750d2 | 976 | return ret; |
7a485870 | 977 | |
b3c750d2 | 978 | error: |
54d01ffb DG |
979 | session_unlock(session); |
980 | session_unlock_list(); | |
7a485870 DG |
981 | return ret; |
982 | } | |
983 | ||
487cf67c | 984 | /* |
ffe60014 DG |
985 | * For each tracing session, update newly registered apps. The session list |
986 | * lock MUST be acquired before calling this. | |
487cf67c DG |
987 | */ |
988 | static void update_ust_app(int app_sock) | |
989 | { | |
990 | struct ltt_session *sess, *stmp; | |
991 | ||
fdadac08 DG |
992 | /* Consumer is in an ERROR state. Stop any application update. */ |
993 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
994 | /* Stop the update process since the consumer is dead. */ | |
995 | return; | |
996 | } | |
997 | ||
487cf67c DG |
998 | /* For all tracing session(s) */ |
999 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
a9ad0c8f MD |
1000 | struct ust_app *app; |
1001 | ||
4ee14516 | 1002 | session_lock(sess); |
a9ad0c8f MD |
1003 | if (!sess->ust_session) { |
1004 | goto unlock_session; | |
1005 | } | |
1006 | ||
1007 | rcu_read_lock(); | |
1008 | assert(app_sock >= 0); | |
1009 | app = ust_app_find_by_sock(app_sock); | |
1010 | if (app == NULL) { | |
1011 | /* | |
1012 | * Application can be unregistered before so | |
1013 | * this is possible hence simply stopping the | |
1014 | * update. | |
1015 | */ | |
1016 | DBG3("UST app update failed to find app sock %d", | |
1017 | app_sock); | |
1018 | goto unlock_rcu; | |
421cb601 | 1019 | } |
a9ad0c8f MD |
1020 | ust_app_global_update(sess->ust_session, app); |
1021 | unlock_rcu: | |
1022 | rcu_read_unlock(); | |
1023 | unlock_session: | |
4ee14516 | 1024 | session_unlock(sess); |
487cf67c DG |
1025 | } |
1026 | } | |
1027 | ||
7a485870 | 1028 | /* |
d063d709 | 1029 | * This thread manage event coming from the kernel. |
7a485870 | 1030 | * |
d063d709 DG |
1031 | * Features supported in this thread: |
1032 | * -) CPU Hotplug | |
7a485870 DG |
1033 | */ |
1034 | static void *thread_manage_kernel(void *data) | |
1035 | { | |
139ac872 | 1036 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 1037 | uint32_t revents, nb_fd; |
7a485870 | 1038 | char tmp; |
5eb91c98 | 1039 | struct lttng_poll_event events; |
7a485870 | 1040 | |
6993eeb3 | 1041 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 1042 | |
6c71277b | 1043 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 1044 | |
d5d63bf1 DG |
1045 | /* |
1046 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 1047 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 1048 | */ |
6d737ce4 | 1049 | lttng_poll_init(&events); |
d5d63bf1 | 1050 | |
e547b070 | 1051 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
1052 | goto error_testpoint; |
1053 | } | |
8ac94142 | 1054 | |
840cb59c | 1055 | health_code_update(); |
44a5e5eb | 1056 | |
e547b070 | 1057 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 1058 | goto error_testpoint; |
6993eeb3 CB |
1059 | } |
1060 | ||
7a485870 | 1061 | while (1) { |
840cb59c | 1062 | health_code_update(); |
44a5e5eb | 1063 | |
7a485870 | 1064 | if (update_poll_flag == 1) { |
d21b0d71 DG |
1065 | /* Clean events object. We are about to populate it again. */ |
1066 | lttng_poll_clean(&events); | |
1067 | ||
d0b96690 | 1068 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
1069 | if (ret < 0) { |
1070 | goto error_poll_create; | |
1071 | } | |
1072 | ||
1073 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
1074 | if (ret < 0) { | |
1075 | goto error; | |
1076 | } | |
5f822d0a | 1077 | |
d21b0d71 | 1078 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
1079 | ret = update_kernel_poll(&events); |
1080 | if (ret < 0) { | |
7a485870 DG |
1081 | goto error; |
1082 | } | |
1083 | update_poll_flag = 0; | |
1084 | } | |
1085 | ||
7fa2082e | 1086 | DBG("Thread kernel polling"); |
7a485870 DG |
1087 | |
1088 | /* Poll infinite value of time */ | |
88f2b785 | 1089 | restart: |
a78af745 | 1090 | health_poll_entry(); |
5eb91c98 | 1091 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1092 | DBG("Thread kernel return from poll on %d fds", |
1093 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1094 | health_poll_exit(); |
7a485870 | 1095 | if (ret < 0) { |
88f2b785 MD |
1096 | /* |
1097 | * Restart interrupted system call. | |
1098 | */ | |
1099 | if (errno == EINTR) { | |
1100 | goto restart; | |
1101 | } | |
7a485870 DG |
1102 | goto error; |
1103 | } else if (ret == 0) { | |
1104 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
1105 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
1106 | "This should not have happened! Continuing..."); | |
7a485870 DG |
1107 | continue; |
1108 | } | |
1109 | ||
0d9c5d77 DG |
1110 | nb_fd = ret; |
1111 | ||
5eb91c98 DG |
1112 | for (i = 0; i < nb_fd; i++) { |
1113 | /* Fetch once the poll data */ | |
1114 | revents = LTTNG_POLL_GETEV(&events, i); | |
1115 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 1116 | |
840cb59c | 1117 | health_code_update(); |
44a5e5eb | 1118 | |
fd20dac9 MD |
1119 | if (!revents) { |
1120 | /* No activity for this FD (poll implementation). */ | |
1121 | continue; | |
1122 | } | |
1123 | ||
5eb91c98 | 1124 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1125 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1126 | if (ret) { |
139ac872 MD |
1127 | err = 0; |
1128 | goto exit; | |
5eb91c98 | 1129 | } |
7a485870 | 1130 | |
5eb91c98 DG |
1131 | /* Check for data on kernel pipe */ |
1132 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
6cd525e8 MD |
1133 | (void) lttng_read(kernel_poll_pipe[0], |
1134 | &tmp, 1); | |
f921c78f DG |
1135 | /* |
1136 | * Ret value is useless here, if this pipe gets any actions an | |
1137 | * update is required anyway. | |
1138 | */ | |
5eb91c98 DG |
1139 | update_poll_flag = 1; |
1140 | continue; | |
1141 | } else { | |
1142 | /* | |
1143 | * New CPU detected by the kernel. Adding kernel stream to | |
1144 | * kernel session and updating the kernel consumer | |
1145 | */ | |
1146 | if (revents & LPOLLIN) { | |
2bdd86d4 | 1147 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
1148 | if (ret < 0) { |
1149 | continue; | |
1150 | } | |
1151 | break; | |
1152 | /* | |
1153 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
1154 | * and unregister kernel stream at this point. | |
1155 | */ | |
7a485870 | 1156 | } |
7a485870 DG |
1157 | } |
1158 | } | |
1159 | } | |
1160 | ||
139ac872 | 1161 | exit: |
7a485870 | 1162 | error: |
5eb91c98 | 1163 | lttng_poll_clean(&events); |
76d7553f | 1164 | error_poll_create: |
6993eeb3 | 1165 | error_testpoint: |
6620da75 DG |
1166 | utils_close_pipe(kernel_poll_pipe); |
1167 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 1168 | if (err) { |
840cb59c | 1169 | health_error(); |
139ac872 | 1170 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
1171 | WARN("Kernel thread died unexpectedly. " |
1172 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 1173 | } |
8782cc74 | 1174 | health_unregister(health_sessiond); |
76d7553f | 1175 | DBG("Kernel thread dying"); |
7a485870 DG |
1176 | return NULL; |
1177 | } | |
1178 | ||
a23ec3a7 DG |
1179 | /* |
1180 | * Signal pthread condition of the consumer data that the thread. | |
1181 | */ | |
1182 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
1183 | { | |
1184 | pthread_mutex_lock(&data->cond_mutex); | |
1185 | ||
1186 | /* | |
1187 | * The state is set before signaling. It can be any value, it's the waiter | |
1188 | * job to correctly interpret this condition variable associated to the | |
1189 | * consumer pthread_cond. | |
1190 | * | |
1191 | * A value of 0 means that the corresponding thread of the consumer data | |
1192 | * was not started. 1 indicates that the thread has started and is ready | |
1193 | * for action. A negative value means that there was an error during the | |
1194 | * thread bootstrap. | |
1195 | */ | |
1196 | data->consumer_thread_is_ready = state; | |
1197 | (void) pthread_cond_signal(&data->cond); | |
1198 | ||
1199 | pthread_mutex_unlock(&data->cond_mutex); | |
1200 | } | |
1201 | ||
1d4b027a | 1202 | /* |
3bd1e081 | 1203 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1204 | */ |
3bd1e081 | 1205 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1206 | { |
42fc1d0b | 1207 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 1208 | uint32_t revents, nb_fd; |
1d4b027a | 1209 | enum lttcomm_return_code code; |
5eb91c98 | 1210 | struct lttng_poll_event events; |
3bd1e081 | 1211 | struct consumer_data *consumer_data = data; |
1d4b027a | 1212 | |
3bd1e081 | 1213 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1214 | |
ceff174b MD |
1215 | rcu_register_thread(); |
1216 | rcu_thread_online(); | |
1217 | ||
6c71277b | 1218 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1219 | |
855060f8 | 1220 | health_code_update(); |
9449cc75 | 1221 | |
5eb91c98 | 1222 | /* |
331744e3 JD |
1223 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1224 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1225 | */ |
331744e3 | 1226 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1227 | if (ret < 0) { |
76d7553f | 1228 | goto error_poll; |
5eb91c98 | 1229 | } |
273ea72c | 1230 | |
edb8b045 DG |
1231 | /* |
1232 | * The error socket here is already in a listening state which was done | |
1233 | * just before spawning this thread to avoid a race between the consumer | |
1234 | * daemon exec trying to connect and the listen() call. | |
1235 | */ | |
3bd1e081 | 1236 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1237 | if (ret < 0) { |
1238 | goto error; | |
1239 | } | |
1240 | ||
840cb59c | 1241 | health_code_update(); |
44a5e5eb | 1242 | |
331744e3 | 1243 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1244 | restart: |
a78af745 | 1245 | health_poll_entry(); |
8ac94142 | 1246 | |
e547b070 | 1247 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
1248 | goto error; |
1249 | } | |
8ac94142 | 1250 | |
5eb91c98 | 1251 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1252 | health_poll_exit(); |
273ea72c | 1253 | if (ret < 0) { |
88f2b785 MD |
1254 | /* |
1255 | * Restart interrupted system call. | |
1256 | */ | |
1257 | if (errno == EINTR) { | |
1258 | goto restart; | |
1259 | } | |
273ea72c DG |
1260 | goto error; |
1261 | } | |
1262 | ||
0d9c5d77 DG |
1263 | nb_fd = ret; |
1264 | ||
5eb91c98 DG |
1265 | for (i = 0; i < nb_fd; i++) { |
1266 | /* Fetch once the poll data */ | |
1267 | revents = LTTNG_POLL_GETEV(&events, i); | |
1268 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1269 | ||
840cb59c | 1270 | health_code_update(); |
44a5e5eb | 1271 | |
fd20dac9 MD |
1272 | if (!revents) { |
1273 | /* No activity for this FD (poll implementation). */ | |
1274 | continue; | |
1275 | } | |
1276 | ||
5eb91c98 | 1277 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1278 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1279 | if (ret) { |
139ac872 MD |
1280 | err = 0; |
1281 | goto exit; | |
5eb91c98 DG |
1282 | } |
1283 | ||
1284 | /* Event on the registration socket */ | |
3bd1e081 | 1285 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 1286 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 1287 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
1288 | goto error; |
1289 | } | |
1290 | } | |
273ea72c DG |
1291 | } |
1292 | ||
3bd1e081 | 1293 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1294 | if (sock < 0) { |
1295 | goto error; | |
1296 | } | |
1297 | ||
b662582b DG |
1298 | /* |
1299 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1300 | * show must go on. | |
1301 | */ | |
1302 | (void) utils_set_fd_cloexec(sock); | |
1303 | ||
840cb59c | 1304 | health_code_update(); |
44a5e5eb | 1305 | |
3bd1e081 | 1306 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1307 | |
712ea556 | 1308 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1309 | ret = lttcomm_recv_unix_sock(sock, &code, |
1310 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1311 | if (ret <= 0) { |
1312 | goto error; | |
1313 | } | |
1314 | ||
840cb59c | 1315 | health_code_update(); |
f73fabfd | 1316 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
331744e3 | 1317 | /* Connect both socket, command and metadata. */ |
3bd1e081 MD |
1318 | consumer_data->cmd_sock = |
1319 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
4ce514c4 | 1320 | consumer_data->metadata_fd = |
331744e3 | 1321 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); |
92db7cdc DG |
1322 | if (consumer_data->cmd_sock < 0 |
1323 | || consumer_data->metadata_fd < 0) { | |
331744e3 | 1324 | PERROR("consumer connect cmd socket"); |
a23ec3a7 DG |
1325 | /* On error, signal condition and quit. */ |
1326 | signal_consumer_condition(consumer_data, -1); | |
1d4b027a DG |
1327 | goto error; |
1328 | } | |
9363801e | 1329 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; |
331744e3 JD |
1330 | /* Create metadata socket lock. */ |
1331 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1332 | if (consumer_data->metadata_sock.lock == NULL) { | |
1333 | PERROR("zmalloc pthread mutex"); | |
1334 | ret = -1; | |
1335 | goto error; | |
1336 | } | |
1337 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1338 | ||
a23ec3a7 | 1339 | signal_consumer_condition(consumer_data, 1); |
331744e3 JD |
1340 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); |
1341 | DBG("Consumer metadata socket ready (fd: %d)", | |
4ce514c4 | 1342 | consumer_data->metadata_fd); |
1d4b027a | 1343 | } else { |
3bd1e081 | 1344 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1345 | lttcomm_get_readable_code(-code)); |
1346 | goto error; | |
1347 | } | |
1348 | ||
331744e3 | 1349 | /* Remove the consumerd error sock since we've established a connexion */ |
3bd1e081 | 1350 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1351 | if (ret < 0) { |
72079cae DG |
1352 | goto error; |
1353 | } | |
1354 | ||
331744e3 | 1355 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1356 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1357 | if (ret < 0) { | |
72079cae | 1358 | goto error; |
5eb91c98 DG |
1359 | } |
1360 | ||
331744e3 | 1361 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1362 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1363 | LPOLLIN | LPOLLRDHUP); |
1364 | if (ret < 0) { | |
1365 | goto error; | |
1366 | } | |
1367 | ||
840cb59c | 1368 | health_code_update(); |
44a5e5eb | 1369 | |
331744e3 | 1370 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1371 | restart_poll: |
331744e3 | 1372 | while (1) { |
42fc1d0b DG |
1373 | health_code_update(); |
1374 | ||
1375 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
1376 | if (should_quit) { | |
1377 | /* Not a health error. */ | |
1378 | err = 0; | |
1379 | goto exit; | |
1380 | } | |
1381 | ||
331744e3 JD |
1382 | health_poll_entry(); |
1383 | ret = lttng_poll_wait(&events, -1); | |
1384 | health_poll_exit(); | |
1385 | if (ret < 0) { | |
1386 | /* | |
1387 | * Restart interrupted system call. | |
1388 | */ | |
1389 | if (errno == EINTR) { | |
1390 | goto restart_poll; | |
1391 | } | |
1392 | goto error; | |
88f2b785 | 1393 | } |
72079cae | 1394 | |
331744e3 | 1395 | nb_fd = ret; |
0d9c5d77 | 1396 | |
331744e3 JD |
1397 | for (i = 0; i < nb_fd; i++) { |
1398 | /* Fetch once the poll data */ | |
1399 | revents = LTTNG_POLL_GETEV(&events, i); | |
1400 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1401 | |
331744e3 | 1402 | health_code_update(); |
44a5e5eb | 1403 | |
fd20dac9 MD |
1404 | if (!revents) { |
1405 | /* No activity for this FD (poll implementation). */ | |
1406 | continue; | |
1407 | } | |
1408 | ||
42fc1d0b DG |
1409 | /* |
1410 | * Thread quit pipe has been triggered, flag that we should stop | |
1411 | * but continue the current loop to handle potential data from | |
1412 | * consumer. | |
1413 | */ | |
1414 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 1415 | |
331744e3 JD |
1416 | if (pollfd == sock) { |
1417 | /* Event on the consumerd socket */ | |
1418 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1419 | ERR("consumer err socket second poll error"); | |
1420 | goto error; | |
1421 | } | |
1422 | health_code_update(); | |
1423 | /* Wait for any kconsumerd error */ | |
1424 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1425 | sizeof(enum lttcomm_return_code)); | |
1426 | if (ret <= 0) { | |
1427 | ERR("consumer closed the command socket"); | |
1428 | goto error; | |
1429 | } | |
1430 | ||
1431 | ERR("consumer return code : %s", | |
1432 | lttcomm_get_readable_code(-code)); | |
1433 | ||
1434 | goto exit; | |
4ce514c4 | 1435 | } else if (pollfd == consumer_data->metadata_fd) { |
331744e3 JD |
1436 | /* UST metadata requests */ |
1437 | ret = ust_consumer_metadata_request( | |
1438 | &consumer_data->metadata_sock); | |
1439 | if (ret < 0) { | |
1440 | ERR("Handling metadata request"); | |
1441 | goto error; | |
1442 | } | |
5eb91c98 | 1443 | } |
42fc1d0b | 1444 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 1445 | } |
331744e3 | 1446 | health_code_update(); |
5eb91c98 DG |
1447 | } |
1448 | ||
139ac872 | 1449 | exit: |
1d4b027a | 1450 | error: |
fdadac08 DG |
1451 | /* |
1452 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1453 | * thread might be using them so get exclusive access which will abort all |
1454 | * other consumer command by other threads. | |
fdadac08 DG |
1455 | */ |
1456 | pthread_mutex_lock(&consumer_data->lock); | |
1457 | ||
5c827ce0 DG |
1458 | /* Immediately set the consumerd state to stopped */ |
1459 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1460 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1461 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1462 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1463 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1464 | } else { | |
1465 | /* Code flow error... */ | |
1466 | assert(0); | |
1467 | } | |
1468 | ||
76d7553f MD |
1469 | if (consumer_data->err_sock >= 0) { |
1470 | ret = close(consumer_data->err_sock); | |
1471 | if (ret) { | |
1472 | PERROR("close"); | |
1473 | } | |
a76cbd9f | 1474 | consumer_data->err_sock = -1; |
76d7553f MD |
1475 | } |
1476 | if (consumer_data->cmd_sock >= 0) { | |
1477 | ret = close(consumer_data->cmd_sock); | |
1478 | if (ret) { | |
1479 | PERROR("close"); | |
1480 | } | |
a76cbd9f | 1481 | consumer_data->cmd_sock = -1; |
76d7553f | 1482 | } |
96544455 SS |
1483 | if (consumer_data->metadata_sock.fd_ptr && |
1484 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1485 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1486 | if (ret) { |
1487 | PERROR("close"); | |
1488 | } | |
1489 | } | |
76d7553f MD |
1490 | if (sock >= 0) { |
1491 | ret = close(sock); | |
1492 | if (ret) { | |
1493 | PERROR("close"); | |
1494 | } | |
1495 | } | |
273ea72c | 1496 | |
3bd1e081 MD |
1497 | unlink(consumer_data->err_unix_sock_path); |
1498 | unlink(consumer_data->cmd_unix_sock_path); | |
1499 | consumer_data->pid = 0; | |
fdadac08 | 1500 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1501 | |
fdadac08 | 1502 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1503 | if (consumer_data->metadata_sock.lock) { |
1504 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1505 | free(consumer_data->metadata_sock.lock); | |
1506 | } | |
5eb91c98 | 1507 | lttng_poll_clean(&events); |
76d7553f | 1508 | error_poll: |
139ac872 | 1509 | if (err) { |
840cb59c | 1510 | health_error(); |
139ac872 MD |
1511 | ERR("Health error occurred in %s", __func__); |
1512 | } | |
8782cc74 | 1513 | health_unregister(health_sessiond); |
76d7553f | 1514 | DBG("consumer thread cleanup completed"); |
0177d773 | 1515 | |
ceff174b MD |
1516 | rcu_thread_offline(); |
1517 | rcu_unregister_thread(); | |
1518 | ||
5eb91c98 | 1519 | return NULL; |
099e26bd DG |
1520 | } |
1521 | ||
099e26bd DG |
1522 | /* |
1523 | * This thread manage application communication. | |
1d4b027a DG |
1524 | */ |
1525 | static void *thread_manage_apps(void *data) | |
099e26bd | 1526 | { |
139ac872 | 1527 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1528 | ssize_t size_ret; |
5eb91c98 | 1529 | uint32_t revents, nb_fd; |
5eb91c98 | 1530 | struct lttng_poll_event events; |
099e26bd DG |
1531 | |
1532 | DBG("[thread] Manage application started"); | |
1533 | ||
f6a9efaa DG |
1534 | rcu_register_thread(); |
1535 | rcu_thread_online(); | |
1536 | ||
6c71277b | 1537 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1538 | |
e547b070 | 1539 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1540 | goto error_testpoint; |
1541 | } | |
1542 | ||
840cb59c | 1543 | health_code_update(); |
44a5e5eb | 1544 | |
d0b96690 | 1545 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1546 | if (ret < 0) { |
76d7553f | 1547 | goto error_poll_create; |
5eb91c98 | 1548 | } |
099e26bd | 1549 | |
5eb91c98 DG |
1550 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1551 | if (ret < 0) { | |
1552 | goto error; | |
1553 | } | |
099e26bd | 1554 | |
e547b070 | 1555 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1556 | goto error; |
1557 | } | |
8ac94142 | 1558 | |
840cb59c | 1559 | health_code_update(); |
44a5e5eb | 1560 | |
5eb91c98 | 1561 | while (1) { |
7fa2082e | 1562 | DBG("Apps thread polling"); |
099e26bd DG |
1563 | |
1564 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1565 | restart: |
a78af745 | 1566 | health_poll_entry(); |
5eb91c98 | 1567 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1568 | DBG("Apps thread return from poll on %d fds", |
1569 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1570 | health_poll_exit(); |
099e26bd | 1571 | if (ret < 0) { |
88f2b785 MD |
1572 | /* |
1573 | * Restart interrupted system call. | |
1574 | */ | |
1575 | if (errno == EINTR) { | |
1576 | goto restart; | |
1577 | } | |
099e26bd DG |
1578 | goto error; |
1579 | } | |
1580 | ||
0d9c5d77 DG |
1581 | nb_fd = ret; |
1582 | ||
5eb91c98 DG |
1583 | for (i = 0; i < nb_fd; i++) { |
1584 | /* Fetch once the poll data */ | |
1585 | revents = LTTNG_POLL_GETEV(&events, i); | |
1586 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1587 | ||
840cb59c | 1588 | health_code_update(); |
44a5e5eb | 1589 | |
fd20dac9 MD |
1590 | if (!revents) { |
1591 | /* No activity for this FD (poll implementation). */ | |
1592 | continue; | |
1593 | } | |
1594 | ||
5eb91c98 | 1595 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1596 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1597 | if (ret) { |
139ac872 MD |
1598 | err = 0; |
1599 | goto exit; | |
5eb91c98 | 1600 | } |
099e26bd | 1601 | |
5eb91c98 DG |
1602 | /* Inspect the apps cmd pipe */ |
1603 | if (pollfd == apps_cmd_pipe[0]) { | |
1604 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1605 | ERR("Apps command pipe error"); | |
0177d773 | 1606 | goto error; |
5eb91c98 | 1607 | } else if (revents & LPOLLIN) { |
d0b96690 DG |
1608 | int sock; |
1609 | ||
5eb91c98 | 1610 | /* Empty pipe */ |
6cd525e8 MD |
1611 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1612 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1613 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1614 | goto error; |
1615 | } | |
099e26bd | 1616 | |
840cb59c | 1617 | health_code_update(); |
44a5e5eb | 1618 | |
ffe60014 | 1619 | /* |
d0b96690 DG |
1620 | * We only monitor the error events of the socket. This |
1621 | * thread does not handle any incoming data from UST | |
1622 | * (POLLIN). | |
ffe60014 | 1623 | */ |
d0b96690 DG |
1624 | ret = lttng_poll_add(&events, sock, |
1625 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1626 | if (ret < 0) { | |
5eb91c98 | 1627 | goto error; |
e0c7ec2b | 1628 | } |
acc7b41b | 1629 | |
d0b96690 | 1630 | DBG("Apps with sock %d added to poll set", sock); |
0177d773 | 1631 | } |
5eb91c98 DG |
1632 | } else { |
1633 | /* | |
54d01ffb DG |
1634 | * At this point, we know that a registered application made |
1635 | * the event at poll_wait. | |
5eb91c98 DG |
1636 | */ |
1637 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1638 | /* Removing from the poll set */ | |
1639 | ret = lttng_poll_del(&events, pollfd); | |
1640 | if (ret < 0) { | |
1641 | goto error; | |
1642 | } | |
099e26bd | 1643 | |
b9d9b220 | 1644 | /* Socket closed on remote end. */ |
56fff090 | 1645 | ust_app_unregister(pollfd); |
5eb91c98 | 1646 | } |
099e26bd | 1647 | } |
44a5e5eb | 1648 | |
840cb59c | 1649 | health_code_update(); |
099e26bd | 1650 | } |
099e26bd DG |
1651 | } |
1652 | ||
139ac872 | 1653 | exit: |
099e26bd | 1654 | error: |
5eb91c98 | 1655 | lttng_poll_clean(&events); |
76d7553f | 1656 | error_poll_create: |
6993eeb3 | 1657 | error_testpoint: |
6620da75 DG |
1658 | utils_close_pipe(apps_cmd_pipe); |
1659 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1660 | ||
1661 | /* | |
1662 | * We don't clean the UST app hash table here since already registered | |
1663 | * applications can still be controlled so let them be until the session | |
1664 | * daemon dies or the applications stop. | |
1665 | */ | |
1666 | ||
139ac872 | 1667 | if (err) { |
840cb59c | 1668 | health_error(); |
139ac872 MD |
1669 | ERR("Health error occurred in %s", __func__); |
1670 | } | |
8782cc74 | 1671 | health_unregister(health_sessiond); |
76d7553f | 1672 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1673 | rcu_thread_offline(); |
1674 | rcu_unregister_thread(); | |
099e26bd DG |
1675 | return NULL; |
1676 | } | |
1677 | ||
d0b96690 | 1678 | /* |
d88aee68 DG |
1679 | * Send a socket to a thread This is called from the dispatch UST registration |
1680 | * thread once all sockets are set for the application. | |
d0b96690 | 1681 | * |
b85dc84c DG |
1682 | * The sock value can be invalid, we don't really care, the thread will handle |
1683 | * it and make the necessary cleanup if so. | |
1684 | * | |
d0b96690 DG |
1685 | * On success, return 0 else a negative value being the errno message of the |
1686 | * write(). | |
1687 | */ | |
d88aee68 | 1688 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1689 | { |
6cd525e8 | 1690 | ssize_t ret; |
d0b96690 | 1691 | |
b85dc84c DG |
1692 | /* |
1693 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1694 | * before calling this function being a shutdown state of the thread. | |
1695 | */ | |
1696 | if (fd < 0) { | |
1697 | ret = -EBADF; | |
1698 | goto error; | |
1699 | } | |
d0b96690 | 1700 | |
6cd525e8 MD |
1701 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1702 | if (ret < sizeof(sock)) { | |
d88aee68 | 1703 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1704 | if (ret < 0) { |
1705 | ret = -errno; | |
1706 | } | |
1707 | goto error; | |
1708 | } | |
1709 | ||
1710 | /* All good. Don't send back the write positive ret value. */ | |
1711 | ret = 0; | |
1712 | error: | |
6cd525e8 | 1713 | return (int) ret; |
d0b96690 DG |
1714 | } |
1715 | ||
f45e313d DG |
1716 | /* |
1717 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1718 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1719 | * notify socket is never received. | |
1720 | */ | |
1721 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1722 | { | |
1723 | int ret, nb_fd = 0, i; | |
1724 | unsigned int fd_added = 0; | |
1725 | struct lttng_poll_event events; | |
1726 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1727 | ||
1728 | assert(wait_queue); | |
1729 | ||
1730 | lttng_poll_init(&events); | |
1731 | ||
1732 | /* Just skip everything for an empty queue. */ | |
1733 | if (!wait_queue->count) { | |
1734 | goto end; | |
1735 | } | |
1736 | ||
1737 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1738 | if (ret < 0) { | |
1739 | goto error_create; | |
1740 | } | |
1741 | ||
1742 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1743 | &wait_queue->head, head) { | |
1744 | assert(wait_node->app); | |
1745 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1746 | LPOLLHUP | LPOLLERR); | |
1747 | if (ret < 0) { | |
1748 | goto error; | |
1749 | } | |
1750 | ||
1751 | fd_added = 1; | |
1752 | } | |
1753 | ||
1754 | if (!fd_added) { | |
1755 | goto end; | |
1756 | } | |
1757 | ||
1758 | /* | |
1759 | * Poll but don't block so we can quickly identify the faulty events and | |
1760 | * clean them afterwards from the wait queue. | |
1761 | */ | |
1762 | ret = lttng_poll_wait(&events, 0); | |
1763 | if (ret < 0) { | |
1764 | goto error; | |
1765 | } | |
1766 | nb_fd = ret; | |
1767 | ||
1768 | for (i = 0; i < nb_fd; i++) { | |
1769 | /* Get faulty FD. */ | |
1770 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1771 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1772 | ||
fd20dac9 MD |
1773 | if (!revents) { |
1774 | /* No activity for this FD (poll implementation). */ | |
1775 | continue; | |
1776 | } | |
1777 | ||
f45e313d DG |
1778 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1779 | &wait_queue->head, head) { | |
1780 | if (pollfd == wait_node->app->sock && | |
1781 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1782 | cds_list_del(&wait_node->head); | |
1783 | wait_queue->count--; | |
1784 | ust_app_destroy(wait_node->app); | |
1785 | free(wait_node); | |
1786 | break; | |
1787 | } | |
1788 | } | |
1789 | } | |
1790 | ||
1791 | if (nb_fd > 0) { | |
1792 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1793 | } | |
1794 | ||
1795 | end: | |
1796 | lttng_poll_clean(&events); | |
1797 | return; | |
1798 | ||
1799 | error: | |
1800 | lttng_poll_clean(&events); | |
1801 | error_create: | |
1802 | ERR("Unable to sanitize wait queue"); | |
1803 | return; | |
1804 | } | |
1805 | ||
099e26bd DG |
1806 | /* |
1807 | * Dispatch request from the registration threads to the application | |
1808 | * communication thread. | |
1809 | */ | |
1810 | static void *thread_dispatch_ust_registration(void *data) | |
1811 | { | |
12e2b881 | 1812 | int ret, err = -1; |
8bdee6e2 | 1813 | struct cds_wfcq_node *node; |
099e26bd | 1814 | struct ust_command *ust_cmd = NULL; |
f45e313d DG |
1815 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1816 | struct ust_reg_wait_queue wait_queue = { | |
1817 | .count = 0, | |
1818 | }; | |
d0b96690 | 1819 | |
6c71277b | 1820 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1821 | |
9ad42ec1 MD |
1822 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1823 | goto error_testpoint; | |
1824 | } | |
1825 | ||
12e2b881 MD |
1826 | health_code_update(); |
1827 | ||
f45e313d | 1828 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1829 | |
1830 | DBG("[thread] Dispatch UST command started"); | |
1831 | ||
26c9d55e | 1832 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
12e2b881 MD |
1833 | health_code_update(); |
1834 | ||
099e26bd DG |
1835 | /* Atomically prepare the queue futex */ |
1836 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1837 | ||
1838 | do { | |
d0b96690 | 1839 | struct ust_app *app = NULL; |
7972aab2 | 1840 | ust_cmd = NULL; |
d0b96690 | 1841 | |
f45e313d DG |
1842 | /* |
1843 | * Make sure we don't have node(s) that have hung up before receiving | |
1844 | * the notify socket. This is to clean the list in order to avoid | |
1845 | * memory leaks from notify socket that are never seen. | |
1846 | */ | |
1847 | sanitize_wait_queue(&wait_queue); | |
1848 | ||
12e2b881 | 1849 | health_code_update(); |
099e26bd | 1850 | /* Dequeue command for registration */ |
8bdee6e2 | 1851 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1852 | if (node == NULL) { |
00a17c97 | 1853 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1854 | /* Continue thread execution */ |
1855 | break; | |
1856 | } | |
1857 | ||
1858 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1859 | ||
2f50c8a3 DG |
1860 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1861 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1862 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1863 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1864 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1865 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1866 | |
1867 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1868 | wait_node = zmalloc(sizeof(*wait_node)); | |
1869 | if (!wait_node) { | |
1870 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1871 | ret = close(ust_cmd->sock); |
1872 | if (ret < 0) { | |
1873 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1874 | } | |
51dec90d | 1875 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1876 | free(ust_cmd); |
d0b96690 DG |
1877 | goto error; |
1878 | } | |
1879 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1880 | ||
1881 | /* Create application object if socket is CMD. */ | |
1882 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1883 | ust_cmd->sock); | |
1884 | if (!wait_node->app) { | |
1885 | ret = close(ust_cmd->sock); | |
1886 | if (ret < 0) { | |
1887 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1888 | } |
51dec90d | 1889 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1890 | free(wait_node); |
7972aab2 | 1891 | free(ust_cmd); |
d0b96690 DG |
1892 | continue; |
1893 | } | |
1894 | /* | |
1895 | * Add application to the wait queue so we can set the notify | |
1896 | * socket before putting this object in the global ht. | |
1897 | */ | |
f45e313d DG |
1898 | cds_list_add(&wait_node->head, &wait_queue.head); |
1899 | wait_queue.count++; | |
d0b96690 | 1900 | |
7972aab2 | 1901 | free(ust_cmd); |
d0b96690 DG |
1902 | /* |
1903 | * We have to continue here since we don't have the notify | |
1904 | * socket and the application MUST be added to the hash table | |
1905 | * only at that moment. | |
1906 | */ | |
1907 | continue; | |
1908 | } else { | |
1909 | /* | |
1910 | * Look for the application in the local wait queue and set the | |
1911 | * notify socket if found. | |
1912 | */ | |
d88aee68 | 1913 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1914 | &wait_queue.head, head) { |
12e2b881 | 1915 | health_code_update(); |
d0b96690 DG |
1916 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1917 | wait_node->app->notify_sock = ust_cmd->sock; | |
1918 | cds_list_del(&wait_node->head); | |
f45e313d | 1919 | wait_queue.count--; |
d0b96690 DG |
1920 | app = wait_node->app; |
1921 | free(wait_node); | |
1922 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1923 | break; | |
1924 | } | |
1925 | } | |
020d7f60 DG |
1926 | |
1927 | /* | |
1928 | * With no application at this stage the received socket is | |
1929 | * basically useless so close it before we free the cmd data | |
1930 | * structure for good. | |
1931 | */ | |
1932 | if (!app) { | |
1933 | ret = close(ust_cmd->sock); | |
1934 | if (ret < 0) { | |
1935 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1936 | } | |
51dec90d | 1937 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1938 | } |
7972aab2 | 1939 | free(ust_cmd); |
d0b96690 DG |
1940 | } |
1941 | ||
1942 | if (app) { | |
d0b96690 DG |
1943 | /* |
1944 | * @session_lock_list | |
1945 | * | |
1946 | * Lock the global session list so from the register up to the | |
1947 | * registration done message, no thread can see the application | |
1948 | * and change its state. | |
1949 | */ | |
1950 | session_lock_list(); | |
1951 | rcu_read_lock(); | |
d88aee68 | 1952 | |
d0b96690 DG |
1953 | /* |
1954 | * Add application to the global hash table. This needs to be | |
1955 | * done before the update to the UST registry can locate the | |
1956 | * application. | |
1957 | */ | |
1958 | ust_app_add(app); | |
d88aee68 DG |
1959 | |
1960 | /* Set app version. This call will print an error if needed. */ | |
1961 | (void) ust_app_version(app); | |
1962 | ||
1963 | /* Send notify socket through the notify pipe. */ | |
1964 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1965 | app->notify_sock); | |
1966 | if (ret < 0) { | |
1967 | rcu_read_unlock(); | |
1968 | session_unlock_list(); | |
b85dc84c DG |
1969 | /* |
1970 | * No notify thread, stop the UST tracing. However, this is | |
1971 | * not an internal error of the this thread thus setting | |
1972 | * the health error code to a normal exit. | |
1973 | */ | |
1974 | err = 0; | |
d88aee68 | 1975 | goto error; |
6620da75 | 1976 | } |
d88aee68 | 1977 | |
d0b96690 DG |
1978 | /* |
1979 | * Update newly registered application with the tracing | |
1980 | * registry info already enabled information. | |
1981 | */ | |
1982 | update_ust_app(app->sock); | |
d88aee68 DG |
1983 | |
1984 | /* | |
1985 | * Don't care about return value. Let the manage apps threads | |
1986 | * handle app unregistration upon socket close. | |
1987 | */ | |
1988 | (void) ust_app_register_done(app->sock); | |
1989 | ||
1990 | /* | |
1991 | * Even if the application socket has been closed, send the app | |
1992 | * to the thread and unregistration will take place at that | |
1993 | * place. | |
1994 | */ | |
1995 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 1996 | if (ret < 0) { |
d88aee68 DG |
1997 | rcu_read_unlock(); |
1998 | session_unlock_list(); | |
b85dc84c DG |
1999 | /* |
2000 | * No apps. thread, stop the UST tracing. However, this is | |
2001 | * not an internal error of the this thread thus setting | |
2002 | * the health error code to a normal exit. | |
2003 | */ | |
2004 | err = 0; | |
d88aee68 | 2005 | goto error; |
d0b96690 | 2006 | } |
d88aee68 | 2007 | |
d0b96690 DG |
2008 | rcu_read_unlock(); |
2009 | session_unlock_list(); | |
099e26bd | 2010 | } |
099e26bd DG |
2011 | } while (node != NULL); |
2012 | ||
12e2b881 | 2013 | health_poll_entry(); |
099e26bd DG |
2014 | /* Futex wait on queue. Blocking call on futex() */ |
2015 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 2016 | health_poll_exit(); |
099e26bd | 2017 | } |
12e2b881 MD |
2018 | /* Normal exit, no error */ |
2019 | err = 0; | |
099e26bd DG |
2020 | |
2021 | error: | |
d88aee68 DG |
2022 | /* Clean up wait queue. */ |
2023 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 2024 | &wait_queue.head, head) { |
d88aee68 | 2025 | cds_list_del(&wait_node->head); |
f45e313d | 2026 | wait_queue.count--; |
d88aee68 DG |
2027 | free(wait_node); |
2028 | } | |
2029 | ||
9ad42ec1 | 2030 | error_testpoint: |
099e26bd | 2031 | DBG("Dispatch thread dying"); |
12e2b881 MD |
2032 | if (err) { |
2033 | health_error(); | |
2034 | ERR("Health error occurred in %s", __func__); | |
2035 | } | |
8782cc74 | 2036 | health_unregister(health_sessiond); |
099e26bd DG |
2037 | return NULL; |
2038 | } | |
2039 | ||
2040 | /* | |
2041 | * This thread manage application registration. | |
2042 | */ | |
2043 | static void *thread_registration_apps(void *data) | |
1d4b027a | 2044 | { |
139ac872 | 2045 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
2046 | uint32_t revents, nb_fd; |
2047 | struct lttng_poll_event events; | |
099e26bd DG |
2048 | /* |
2049 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
2050 | * freed in the manage apps thread. | |
2051 | */ | |
2052 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 2053 | |
099e26bd | 2054 | DBG("[thread] Manage application registration started"); |
1d4b027a | 2055 | |
6c71277b | 2056 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 2057 | |
e547b070 | 2058 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
2059 | goto error_testpoint; |
2060 | } | |
8ac94142 | 2061 | |
1d4b027a DG |
2062 | ret = lttcomm_listen_unix_sock(apps_sock); |
2063 | if (ret < 0) { | |
76d7553f | 2064 | goto error_listen; |
1d4b027a DG |
2065 | } |
2066 | ||
5eb91c98 DG |
2067 | /* |
2068 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
2069 | * more will be added to this poll set. | |
2070 | */ | |
d0b96690 | 2071 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 2072 | if (ret < 0) { |
76d7553f | 2073 | goto error_create_poll; |
5eb91c98 | 2074 | } |
273ea72c | 2075 | |
5eb91c98 DG |
2076 | /* Add the application registration socket */ |
2077 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
2078 | if (ret < 0) { | |
76d7553f | 2079 | goto error_poll_add; |
5eb91c98 | 2080 | } |
273ea72c | 2081 | |
1d4b027a | 2082 | /* Notify all applications to register */ |
0fdd1e2c DG |
2083 | ret = notify_ust_apps(1); |
2084 | if (ret < 0) { | |
2085 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
2086 | "Execution continues but there might be problem for already\n" |
2087 | "running applications that wishes to register."); | |
0fdd1e2c | 2088 | } |
1d4b027a DG |
2089 | |
2090 | while (1) { | |
2091 | DBG("Accepting application registration"); | |
273ea72c DG |
2092 | |
2093 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 2094 | restart: |
a78af745 | 2095 | health_poll_entry(); |
5eb91c98 | 2096 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 2097 | health_poll_exit(); |
273ea72c | 2098 | if (ret < 0) { |
88f2b785 MD |
2099 | /* |
2100 | * Restart interrupted system call. | |
2101 | */ | |
2102 | if (errno == EINTR) { | |
2103 | goto restart; | |
2104 | } | |
273ea72c DG |
2105 | goto error; |
2106 | } | |
2107 | ||
0d9c5d77 DG |
2108 | nb_fd = ret; |
2109 | ||
5eb91c98 | 2110 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 2111 | health_code_update(); |
139ac872 | 2112 | |
5eb91c98 DG |
2113 | /* Fetch once the poll data */ |
2114 | revents = LTTNG_POLL_GETEV(&events, i); | |
2115 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 2116 | |
fd20dac9 MD |
2117 | if (!revents) { |
2118 | /* No activity for this FD (poll implementation). */ | |
2119 | continue; | |
2120 | } | |
2121 | ||
5eb91c98 | 2122 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 2123 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 2124 | if (ret) { |
139ac872 MD |
2125 | err = 0; |
2126 | goto exit; | |
90014c57 | 2127 | } |
1d4b027a | 2128 | |
5eb91c98 DG |
2129 | /* Event on the registration socket */ |
2130 | if (pollfd == apps_sock) { | |
2131 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2132 | ERR("Register apps socket poll error"); | |
2133 | goto error; | |
2134 | } else if (revents & LPOLLIN) { | |
2135 | sock = lttcomm_accept_unix_sock(apps_sock); | |
2136 | if (sock < 0) { | |
2137 | goto error; | |
2138 | } | |
099e26bd | 2139 | |
16c5c8fa DG |
2140 | /* |
2141 | * Set socket timeout for both receiving and ending. | |
2142 | * app_socket_timeout is in seconds, whereas | |
2143 | * lttcomm_setsockopt_rcv_timeout and | |
2144 | * lttcomm_setsockopt_snd_timeout expect msec as | |
2145 | * parameter. | |
2146 | */ | |
2147 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
2148 | app_socket_timeout * 1000); | |
2149 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
2150 | app_socket_timeout * 1000); | |
2151 | ||
b662582b DG |
2152 | /* |
2153 | * Set the CLOEXEC flag. Return code is useless because | |
2154 | * either way, the show must go on. | |
2155 | */ | |
2156 | (void) utils_set_fd_cloexec(sock); | |
2157 | ||
5eb91c98 | 2158 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 2159 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 2160 | if (ust_cmd == NULL) { |
76d7553f | 2161 | PERROR("ust command zmalloc"); |
ba6e4263 MD |
2162 | ret = close(sock); |
2163 | if (ret) { | |
2164 | PERROR("close"); | |
2165 | } | |
5eb91c98 DG |
2166 | goto error; |
2167 | } | |
1d4b027a | 2168 | |
5eb91c98 DG |
2169 | /* |
2170 | * Using message-based transmissions to ensure we don't | |
2171 | * have to deal with partially received messages. | |
2172 | */ | |
4063050c MD |
2173 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
2174 | if (ret < 0) { | |
2175 | ERR("Exhausted file descriptors allowed for applications."); | |
2176 | free(ust_cmd); | |
2177 | ret = close(sock); | |
2178 | if (ret) { | |
2179 | PERROR("close"); | |
2180 | } | |
2181 | sock = -1; | |
2182 | continue; | |
2183 | } | |
d88aee68 | 2184 | |
840cb59c | 2185 | health_code_update(); |
d0b96690 DG |
2186 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
2187 | if (ret < 0) { | |
5eb91c98 | 2188 | free(ust_cmd); |
d0b96690 | 2189 | /* Close socket of the application. */ |
76d7553f MD |
2190 | ret = close(sock); |
2191 | if (ret) { | |
2192 | PERROR("close"); | |
2193 | } | |
4063050c | 2194 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 2195 | sock = -1; |
5eb91c98 DG |
2196 | continue; |
2197 | } | |
840cb59c | 2198 | health_code_update(); |
099e26bd | 2199 | |
5eb91c98 | 2200 | ust_cmd->sock = sock; |
34a2494f | 2201 | sock = -1; |
099e26bd | 2202 | |
5eb91c98 DG |
2203 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2204 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2205 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2206 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2207 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2208 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2209 | |
5eb91c98 DG |
2210 | /* |
2211 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2212 | * has been taken! This apps will be part of the *system*. |
5eb91c98 | 2213 | */ |
8bdee6e2 | 2214 | cds_wfcq_enqueue(&ust_cmd_queue.head, &ust_cmd_queue.tail, &ust_cmd->node); |
5eb91c98 DG |
2215 | |
2216 | /* | |
2217 | * Wake the registration queue futex. Implicit memory | |
8bdee6e2 | 2218 | * barrier with the exchange in cds_wfcq_enqueue. |
5eb91c98 DG |
2219 | */ |
2220 | futex_nto1_wake(&ust_cmd_queue.futex); | |
2221 | } | |
2222 | } | |
90014c57 | 2223 | } |
1d4b027a DG |
2224 | } |
2225 | ||
139ac872 | 2226 | exit: |
1d4b027a | 2227 | error: |
0fdd1e2c DG |
2228 | /* Notify that the registration thread is gone */ |
2229 | notify_ust_apps(0); | |
2230 | ||
a4b35e07 | 2231 | if (apps_sock >= 0) { |
76d7553f MD |
2232 | ret = close(apps_sock); |
2233 | if (ret) { | |
2234 | PERROR("close"); | |
2235 | } | |
a4b35e07 | 2236 | } |
46c3f085 | 2237 | if (sock >= 0) { |
76d7553f MD |
2238 | ret = close(sock); |
2239 | if (ret) { | |
2240 | PERROR("close"); | |
2241 | } | |
4063050c | 2242 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2243 | } |
273ea72c | 2244 | unlink(apps_unix_sock_path); |
0fdd1e2c | 2245 | |
76d7553f | 2246 | error_poll_add: |
5eb91c98 | 2247 | lttng_poll_clean(&events); |
76d7553f MD |
2248 | error_listen: |
2249 | error_create_poll: | |
6993eeb3 | 2250 | error_testpoint: |
76d7553f | 2251 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2252 | if (err) { |
2253 | health_error(); | |
2254 | ERR("Health error occurred in %s", __func__); | |
2255 | } | |
8782cc74 | 2256 | health_unregister(health_sessiond); |
5eb91c98 | 2257 | |
1d4b027a DG |
2258 | return NULL; |
2259 | } | |
2260 | ||
8c0faa1d | 2261 | /* |
3bd1e081 | 2262 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2263 | * exec or it will fails. |
8c0faa1d | 2264 | */ |
3bd1e081 | 2265 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2266 | { |
a23ec3a7 | 2267 | int ret, clock_ret; |
ee0b0061 DG |
2268 | struct timespec timeout; |
2269 | ||
a23ec3a7 DG |
2270 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
2271 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 2272 | |
a23ec3a7 DG |
2273 | /* Setup pthread condition */ |
2274 | ret = pthread_condattr_init(&consumer_data->condattr); | |
4a15001e | 2275 | if (ret) { |
a23ec3a7 DG |
2276 | errno = ret; |
2277 | PERROR("pthread_condattr_init consumer data"); | |
2278 | goto error; | |
2279 | } | |
2280 | ||
2281 | /* | |
2282 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2283 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2284 | * for a more details and how we noticed it. | |
2285 | */ | |
2286 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
4a15001e | 2287 | if (ret) { |
a23ec3a7 DG |
2288 | errno = ret; |
2289 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2290 | goto error; |
2291 | } | |
8c0faa1d | 2292 | |
a23ec3a7 | 2293 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
4a15001e | 2294 | if (ret) { |
a23ec3a7 DG |
2295 | errno = ret; |
2296 | PERROR("pthread_cond_init consumer data"); | |
2297 | goto error; | |
2298 | } | |
2299 | ||
2300 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
2301 | consumer_data); | |
4a15001e MD |
2302 | if (ret) { |
2303 | errno = ret; | |
3bd1e081 | 2304 | PERROR("pthread_create consumer"); |
ee0b0061 | 2305 | ret = -1; |
8c0faa1d DG |
2306 | goto error; |
2307 | } | |
2308 | ||
a23ec3a7 DG |
2309 | /* We are about to wait on a pthread condition */ |
2310 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2311 | ||
ee0b0061 | 2312 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
2313 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
2314 | /* | |
2315 | * Set the timeout for the condition timed wait even if the clock gettime | |
2316 | * call fails since we might loop on that call and we want to avoid to | |
2317 | * increment the timeout too many times. | |
2318 | */ | |
2319 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2320 | ||
2321 | /* | |
2322 | * The following loop COULD be skipped in some conditions so this is why we | |
2323 | * set ret to 0 in order to make sure at least one round of the loop is | |
2324 | * done. | |
2325 | */ | |
2326 | ret = 0; | |
2327 | ||
2328 | /* | |
2329 | * Loop until the condition is reached or when a timeout is reached. Note | |
2330 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2331 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2332 | * possible. This loop does not take any chances and works with both of | |
2333 | * them. | |
2334 | */ | |
2335 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2336 | if (clock_ret < 0) { | |
2337 | PERROR("clock_gettime spawn consumer"); | |
2338 | /* Infinite wait for the consumerd thread to be ready */ | |
2339 | ret = pthread_cond_wait(&consumer_data->cond, | |
2340 | &consumer_data->cond_mutex); | |
2341 | } else { | |
2342 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2343 | &consumer_data->cond_mutex, &timeout); | |
2344 | } | |
ee0b0061 | 2345 | } |
8c0faa1d | 2346 | |
a23ec3a7 DG |
2347 | /* Release the pthread condition */ |
2348 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2349 | ||
2350 | if (ret != 0) { | |
2351 | errno = ret; | |
2352 | if (ret == ETIMEDOUT) { | |
4282f9a3 DG |
2353 | int pth_ret; |
2354 | ||
ee0b0061 DG |
2355 | /* |
2356 | * Call has timed out so we kill the kconsumerd_thread and return | |
2357 | * an error. | |
2358 | */ | |
a23ec3a7 DG |
2359 | ERR("Condition timed out. The consumer thread was never ready." |
2360 | " Killing it"); | |
4282f9a3 DG |
2361 | pth_ret = pthread_cancel(consumer_data->thread); |
2362 | if (pth_ret < 0) { | |
3bd1e081 | 2363 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2364 | } |
2365 | } else { | |
a23ec3a7 | 2366 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 | 2367 | } |
4282f9a3 DG |
2368 | /* Caller is expecting a negative value on failure. */ |
2369 | ret = -1; | |
ee0b0061 DG |
2370 | goto error; |
2371 | } | |
2372 | ||
3bd1e081 MD |
2373 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2374 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2375 | ERR("Consumerd did not start"); |
3bd1e081 | 2376 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2377 | goto error; |
2378 | } | |
3bd1e081 | 2379 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2380 | |
8c0faa1d DG |
2381 | return 0; |
2382 | ||
2383 | error: | |
2384 | return ret; | |
2385 | } | |
2386 | ||
d9800920 | 2387 | /* |
3bd1e081 | 2388 | * Join consumer thread |
d9800920 | 2389 | */ |
3bd1e081 | 2390 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2391 | { |
2392 | void *status; | |
cf3af59e | 2393 | |
e8209f6b DG |
2394 | /* Consumer pid must be a real one. */ |
2395 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2396 | int ret; |
3bd1e081 | 2397 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2398 | if (ret) { |
4a15001e | 2399 | PERROR("Error killing consumer daemon"); |
cf3af59e MD |
2400 | return ret; |
2401 | } | |
3bd1e081 | 2402 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2403 | } else { |
2404 | return 0; | |
2405 | } | |
2406 | } | |
2407 | ||
8c0faa1d | 2408 | /* |
3bd1e081 | 2409 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2410 | * |
d063d709 | 2411 | * Return pid if successful else -1. |
8c0faa1d | 2412 | */ |
3bd1e081 | 2413 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2414 | { |
2415 | int ret; | |
2416 | pid_t pid; | |
94c55f17 | 2417 | const char *consumer_to_use; |
53086306 | 2418 | const char *verbosity; |
94c55f17 | 2419 | struct stat st; |
8c0faa1d | 2420 | |
3bd1e081 | 2421 | DBG("Spawning consumerd"); |
c49dc785 | 2422 | |
8c0faa1d DG |
2423 | pid = fork(); |
2424 | if (pid == 0) { | |
2425 | /* | |
3bd1e081 | 2426 | * Exec consumerd. |
8c0faa1d | 2427 | */ |
daee5345 | 2428 | if (opt_verbose_consumer) { |
53086306 | 2429 | verbosity = "--verbose"; |
4421f712 | 2430 | } else if (lttng_opt_quiet) { |
53086306 | 2431 | verbosity = "--quiet"; |
4421f712 DG |
2432 | } else { |
2433 | verbosity = ""; | |
53086306 | 2434 | } |
4421f712 | 2435 | |
3bd1e081 MD |
2436 | switch (consumer_data->type) { |
2437 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2438 | /* |
c7704d57 DG |
2439 | * Find out which consumerd to execute. We will first try the |
2440 | * 64-bit path, then the sessiond's installation directory, and | |
2441 | * fallback on the 32-bit one, | |
94c55f17 | 2442 | */ |
63a799e8 AM |
2443 | DBG3("Looking for a kernel consumer at these locations:"); |
2444 | DBG3(" 1) %s", consumerd64_bin); | |
2445 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
2446 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 2447 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 2448 | DBG3("Found location #1"); |
94c55f17 | 2449 | consumer_to_use = consumerd64_bin; |
94c55f17 | 2450 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 2451 | DBG3("Found location #2"); |
94c55f17 | 2452 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 2453 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 2454 | DBG3("Found location #3"); |
eb1e0bd4 | 2455 | consumer_to_use = consumerd32_bin; |
94c55f17 | 2456 | } else { |
63a799e8 | 2457 | DBG("Could not find any valid consumerd executable"); |
4282f9a3 | 2458 | ret = -EINVAL; |
94c55f17 AM |
2459 | break; |
2460 | } | |
2461 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
4282f9a3 | 2462 | ret = execl(consumer_to_use, |
94c55f17 AM |
2463 | "lttng-consumerd", verbosity, "-k", |
2464 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2465 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2466 | "--group", tracing_group_name, |
94c55f17 | 2467 | NULL); |
3bd1e081 | 2468 | break; |
7753dea8 MD |
2469 | case LTTNG_CONSUMER64_UST: |
2470 | { | |
b1e0b6b6 | 2471 | char *tmpnew = NULL; |
8f4905da MD |
2472 | |
2473 | if (consumerd64_libdir[0] != '\0') { | |
2474 | char *tmp; | |
2475 | size_t tmplen; | |
2476 | ||
e8fa9fb0 | 2477 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2478 | if (!tmp) { |
2479 | tmp = ""; | |
2480 | } | |
2481 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2482 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
2483 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2484 | if (!tmpnew) { | |
2485 | ret = -ENOMEM; | |
2486 | goto error; | |
2487 | } | |
2488 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2489 | strcat(tmpnew, consumerd64_libdir); | |
2490 | if (tmp[0] != '\0') { | |
2491 | strcat(tmpnew, ":"); | |
2492 | strcat(tmpnew, tmp); | |
2493 | } | |
2494 | ret = putenv(tmpnew); | |
2495 | if (ret) { | |
2496 | ret = -errno; | |
c6f76da9 | 2497 | free(tmpnew); |
8f4905da MD |
2498 | goto error; |
2499 | } | |
2500 | } | |
94c55f17 | 2501 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 2502 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2503 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2504 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2505 | "--group", tracing_group_name, |
7753dea8 | 2506 | NULL); |
8f4905da MD |
2507 | if (consumerd64_libdir[0] != '\0') { |
2508 | free(tmpnew); | |
2509 | } | |
3bd1e081 | 2510 | break; |
7753dea8 MD |
2511 | } |
2512 | case LTTNG_CONSUMER32_UST: | |
2513 | { | |
937dde8e | 2514 | char *tmpnew = NULL; |
8f4905da MD |
2515 | |
2516 | if (consumerd32_libdir[0] != '\0') { | |
2517 | char *tmp; | |
2518 | size_t tmplen; | |
2519 | ||
e8fa9fb0 | 2520 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2521 | if (!tmp) { |
2522 | tmp = ""; | |
2523 | } | |
2524 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2525 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2526 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2527 | if (!tmpnew) { | |
2528 | ret = -ENOMEM; | |
2529 | goto error; | |
2530 | } | |
2531 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2532 | strcat(tmpnew, consumerd32_libdir); | |
2533 | if (tmp[0] != '\0') { | |
2534 | strcat(tmpnew, ":"); | |
2535 | strcat(tmpnew, tmp); | |
2536 | } | |
2537 | ret = putenv(tmpnew); | |
2538 | if (ret) { | |
2539 | ret = -errno; | |
c6f76da9 | 2540 | free(tmpnew); |
8f4905da MD |
2541 | goto error; |
2542 | } | |
2543 | } | |
94c55f17 | 2544 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 2545 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2546 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2547 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2548 | "--group", tracing_group_name, |
7753dea8 | 2549 | NULL); |
8f4905da MD |
2550 | if (consumerd32_libdir[0] != '\0') { |
2551 | free(tmpnew); | |
2552 | } | |
7753dea8 MD |
2553 | break; |
2554 | } | |
3bd1e081 | 2555 | default: |
76d7553f | 2556 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2557 | exit(EXIT_FAILURE); |
2558 | } | |
8c0faa1d | 2559 | if (errno != 0) { |
4282f9a3 | 2560 | PERROR("Consumer execl()"); |
8c0faa1d | 2561 | } |
4282f9a3 | 2562 | /* Reaching this point, we got a failure on our execl(). */ |
8c0faa1d DG |
2563 | exit(EXIT_FAILURE); |
2564 | } else if (pid > 0) { | |
2565 | ret = pid; | |
8c0faa1d | 2566 | } else { |
76d7553f | 2567 | PERROR("start consumer fork"); |
8c0faa1d | 2568 | ret = -errno; |
8c0faa1d | 2569 | } |
8f4905da | 2570 | error: |
8c0faa1d DG |
2571 | return ret; |
2572 | } | |
2573 | ||
693bd40b | 2574 | /* |
3bd1e081 | 2575 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2576 | */ |
3bd1e081 | 2577 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2578 | { |
c617c0c6 | 2579 | int ret; |
edb8b045 DG |
2580 | |
2581 | /* | |
2582 | * Set the listen() state on the socket since there is a possible race | |
2583 | * between the exec() of the consumer daemon and this call if place in the | |
2584 | * consumer thread. See bug #366 for more details. | |
2585 | */ | |
2586 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2587 | if (ret < 0) { | |
2588 | goto error; | |
2589 | } | |
693bd40b | 2590 | |
3bd1e081 MD |
2591 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2592 | if (consumer_data->pid != 0) { | |
2593 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2594 | goto end; |
2595 | } | |
693bd40b | 2596 | |
3bd1e081 | 2597 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2598 | if (ret < 0) { |
3bd1e081 MD |
2599 | ERR("Spawning consumerd failed"); |
2600 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2601 | goto error; |
693bd40b | 2602 | } |
c49dc785 | 2603 | |
3bd1e081 MD |
2604 | /* Setting up the consumer_data pid */ |
2605 | consumer_data->pid = ret; | |
48842b30 | 2606 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2607 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2608 | |
3bd1e081 MD |
2609 | DBG2("Spawning consumer control thread"); |
2610 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2611 | if (ret < 0) { |
3bd1e081 | 2612 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2613 | goto error; |
2614 | } | |
2615 | ||
c49dc785 | 2616 | end: |
693bd40b DG |
2617 | return 0; |
2618 | ||
2619 | error: | |
331744e3 | 2620 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2621 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2622 | int err; |
2623 | ||
edb8b045 DG |
2624 | err = close(consumer_data->err_sock); |
2625 | if (err < 0) { | |
2626 | PERROR("close consumer data error socket"); | |
2627 | } | |
2628 | } | |
693bd40b DG |
2629 | return ret; |
2630 | } | |
2631 | ||
b73401da | 2632 | /* |
096102bd | 2633 | * Setup necessary data for kernel tracer action. |
b73401da | 2634 | */ |
096102bd | 2635 | static int init_kernel_tracer(void) |
b73401da DG |
2636 | { |
2637 | int ret; | |
b73401da | 2638 | |
096102bd DG |
2639 | /* Modprobe lttng kernel modules */ |
2640 | ret = modprobe_lttng_control(); | |
b73401da | 2641 | if (ret < 0) { |
b73401da DG |
2642 | goto error; |
2643 | } | |
2644 | ||
096102bd DG |
2645 | /* Open debugfs lttng */ |
2646 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2647 | if (kernel_tracer_fd < 0) { | |
2648 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
2649 | ret = -1; |
2650 | goto error_open; | |
54d01ffb DG |
2651 | } |
2652 | ||
2f77fc4b DG |
2653 | /* Validate kernel version */ |
2654 | ret = kernel_validate_version(kernel_tracer_fd); | |
2655 | if (ret < 0) { | |
2656 | goto error_version; | |
b551a063 | 2657 | } |
54d01ffb | 2658 | |
2f77fc4b DG |
2659 | ret = modprobe_lttng_data(); |
2660 | if (ret < 0) { | |
2661 | goto error_modules; | |
54d01ffb DG |
2662 | } |
2663 | ||
2f77fc4b DG |
2664 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2665 | return 0; | |
2666 | ||
2667 | error_version: | |
2668 | modprobe_remove_lttng_control(); | |
2669 | ret = close(kernel_tracer_fd); | |
2670 | if (ret) { | |
2671 | PERROR("close"); | |
b551a063 | 2672 | } |
2f77fc4b | 2673 | kernel_tracer_fd = -1; |
f73fabfd | 2674 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2675 | |
2f77fc4b DG |
2676 | error_modules: |
2677 | ret = close(kernel_tracer_fd); | |
2678 | if (ret) { | |
2679 | PERROR("close"); | |
b551a063 | 2680 | } |
54d01ffb | 2681 | |
2f77fc4b DG |
2682 | error_open: |
2683 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2684 | |
2685 | error: | |
2f77fc4b DG |
2686 | WARN("No kernel tracer available"); |
2687 | kernel_tracer_fd = -1; | |
2688 | if (!is_root) { | |
f73fabfd | 2689 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2690 | } else { |
f73fabfd | 2691 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2692 | } |
54d01ffb DG |
2693 | } |
2694 | ||
2f77fc4b | 2695 | |
54d01ffb | 2696 | /* |
2f77fc4b DG |
2697 | * Copy consumer output from the tracing session to the domain session. The |
2698 | * function also applies the right modification on a per domain basis for the | |
2699 | * trace files destination directory. | |
36b588ed MD |
2700 | * |
2701 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2702 | */ |
2f77fc4b | 2703 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2704 | { |
2705 | int ret; | |
2f77fc4b DG |
2706 | const char *dir_name; |
2707 | struct consumer_output *consumer; | |
2708 | ||
2709 | assert(session); | |
2710 | assert(session->consumer); | |
54d01ffb | 2711 | |
b551a063 DG |
2712 | switch (domain) { |
2713 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2714 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2715 | /* |
2716 | * XXX: We should audit the session creation and what this function | |
2717 | * does "extra" in order to avoid a destroy since this function is used | |
2718 | * in the domain session creation (kernel and ust) only. Same for UST | |
2719 | * domain. | |
2720 | */ | |
2721 | if (session->kernel_session->consumer) { | |
95a90d01 | 2722 | consumer_output_put(session->kernel_session->consumer); |
09a90bcd | 2723 | } |
2f77fc4b DG |
2724 | session->kernel_session->consumer = |
2725 | consumer_copy_output(session->consumer); | |
2726 | /* Ease our life a bit for the next part */ | |
2727 | consumer = session->kernel_session->consumer; | |
2728 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2729 | break; |
f20baf8e | 2730 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2731 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2732 | case LTTNG_DOMAIN_PYTHON: |
b551a063 | 2733 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2734 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd | 2735 | if (session->ust_session->consumer) { |
95a90d01 | 2736 | consumer_output_put(session->ust_session->consumer); |
09a90bcd | 2737 | } |
2f77fc4b DG |
2738 | session->ust_session->consumer = |
2739 | consumer_copy_output(session->consumer); | |
2740 | /* Ease our life a bit for the next part */ | |
2741 | consumer = session->ust_session->consumer; | |
2742 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2743 | break; |
2744 | default: | |
f73fabfd | 2745 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2746 | goto error; |
2747 | } | |
2748 | ||
2f77fc4b | 2749 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2750 | strncat(consumer->subdir, dir_name, |
2751 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2752 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2753 | ||
f73fabfd | 2754 | ret = LTTNG_OK; |
54d01ffb DG |
2755 | |
2756 | error: | |
2757 | return ret; | |
2758 | } | |
2759 | ||
00e2e675 | 2760 | /* |
2f77fc4b | 2761 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2762 | * |
2763 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2764 | */ |
2f77fc4b DG |
2765 | static int create_ust_session(struct ltt_session *session, |
2766 | struct lttng_domain *domain) | |
00e2e675 DG |
2767 | { |
2768 | int ret; | |
2f77fc4b | 2769 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2770 | |
a4b92340 | 2771 | assert(session); |
2f77fc4b DG |
2772 | assert(domain); |
2773 | assert(session->consumer); | |
a4b92340 | 2774 | |
2f77fc4b | 2775 | switch (domain->type) { |
f20baf8e | 2776 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2777 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2778 | case LTTNG_DOMAIN_PYTHON: |
2f77fc4b DG |
2779 | case LTTNG_DOMAIN_UST: |
2780 | break; | |
2781 | default: | |
2782 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2783 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2784 | goto error; |
2785 | } | |
2786 | ||
2f77fc4b DG |
2787 | DBG("Creating UST session"); |
2788 | ||
dec56f6c | 2789 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2790 | if (lus == NULL) { |
f73fabfd | 2791 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2792 | goto error; |
2793 | } | |
2794 | ||
2f77fc4b DG |
2795 | lus->uid = session->uid; |
2796 | lus->gid = session->gid; | |
2bba9e53 | 2797 | lus->output_traces = session->output_traces; |
27babd3a | 2798 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2799 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2800 | session->ust_session = lus; |
d7ba1388 | 2801 | if (session->shm_path[0]) { |
3d071855 MD |
2802 | strncpy(lus->root_shm_path, session->shm_path, |
2803 | sizeof(lus->root_shm_path)); | |
2804 | lus->root_shm_path[sizeof(lus->root_shm_path) - 1] = '\0'; | |
d7ba1388 MD |
2805 | strncpy(lus->shm_path, session->shm_path, |
2806 | sizeof(lus->shm_path)); | |
2807 | lus->shm_path[sizeof(lus->shm_path) - 1] = '\0'; | |
2808 | strncat(lus->shm_path, "/ust", | |
2809 | sizeof(lus->shm_path) - strlen(lus->shm_path) - 1); | |
2810 | } | |
2f77fc4b DG |
2811 | /* Copy session output to the newly created UST session */ |
2812 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2813 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2814 | goto error; |
2815 | } | |
2816 | ||
f73fabfd | 2817 | return LTTNG_OK; |
00e2e675 DG |
2818 | |
2819 | error: | |
2f77fc4b DG |
2820 | free(lus); |
2821 | session->ust_session = NULL; | |
00e2e675 DG |
2822 | return ret; |
2823 | } | |
2824 | ||
2825 | /* | |
2f77fc4b | 2826 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2827 | */ |
2f77fc4b | 2828 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2829 | { |
2830 | int ret; | |
a4b92340 | 2831 | |
2f77fc4b | 2832 | DBG("Creating kernel session"); |
00e2e675 | 2833 | |
2f77fc4b DG |
2834 | ret = kernel_create_session(session, kernel_tracer_fd); |
2835 | if (ret < 0) { | |
f73fabfd | 2836 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2837 | goto error; |
2838 | } | |
2839 | ||
2f77fc4b DG |
2840 | /* Code flow safety */ |
2841 | assert(session->kernel_session); | |
2842 | ||
2843 | /* Copy session output to the newly created Kernel session */ | |
2844 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2845 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2846 | goto error; |
2847 | } | |
2848 | ||
2f77fc4b DG |
2849 | /* Create directory(ies) on local filesystem. */ |
2850 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2851 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2852 | ret = run_as_mkdir_recursive( | |
2853 | session->kernel_session->consumer->dst.trace_path, | |
2854 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2855 | if (ret < 0) { | |
a68b8851 | 2856 | if (errno != EEXIST) { |
2f77fc4b | 2857 | ERR("Trace directory creation error"); |
00e2e675 DG |
2858 | goto error; |
2859 | } | |
00e2e675 | 2860 | } |
2f77fc4b | 2861 | } |
00e2e675 | 2862 | |
2f77fc4b DG |
2863 | session->kernel_session->uid = session->uid; |
2864 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2865 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2866 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2867 | |
f73fabfd | 2868 | return LTTNG_OK; |
00e2e675 | 2869 | |
2f77fc4b DG |
2870 | error: |
2871 | trace_kernel_destroy_session(session->kernel_session); | |
2872 | session->kernel_session = NULL; | |
2873 | return ret; | |
2874 | } | |
00e2e675 | 2875 | |
2f77fc4b DG |
2876 | /* |
2877 | * Count number of session permitted by uid/gid. | |
2878 | */ | |
2879 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2880 | { | |
2881 | unsigned int i = 0; | |
2882 | struct ltt_session *session; | |
07424f16 | 2883 | |
2f77fc4b DG |
2884 | DBG("Counting number of available session for UID %d GID %d", |
2885 | uid, gid); | |
2886 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2887 | /* |
2f77fc4b | 2888 | * Only list the sessions the user can control. |
00e2e675 | 2889 | */ |
2f77fc4b DG |
2890 | if (!session_access_ok(session, uid, gid)) { |
2891 | continue; | |
2892 | } | |
2893 | i++; | |
a4b92340 | 2894 | } |
2f77fc4b | 2895 | return i; |
00e2e675 DG |
2896 | } |
2897 | ||
54d01ffb DG |
2898 | /* |
2899 | * Process the command requested by the lttng client within the command | |
2900 | * context structure. This function make sure that the return structure (llm) | |
2901 | * is set and ready for transmission before returning. | |
2902 | * | |
2903 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2904 | * |
2905 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2906 | * |
2907 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2908 | */ |
53a80697 MD |
2909 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2910 | int *sock_error) | |
54d01ffb | 2911 | { |
f73fabfd | 2912 | int ret = LTTNG_OK; |
44d3bd01 | 2913 | int need_tracing_session = 1; |
2e09ba09 | 2914 | int need_domain; |
54d01ffb DG |
2915 | |
2916 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2917 | ||
53a80697 MD |
2918 | *sock_error = 0; |
2919 | ||
2e09ba09 MD |
2920 | switch (cmd_ctx->lsm->cmd_type) { |
2921 | case LTTNG_CREATE_SESSION: | |
27babd3a | 2922 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2923 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
2924 | case LTTNG_DESTROY_SESSION: |
2925 | case LTTNG_LIST_SESSIONS: | |
2926 | case LTTNG_LIST_DOMAINS: | |
2927 | case LTTNG_START_TRACE: | |
2928 | case LTTNG_STOP_TRACE: | |
6d805429 | 2929 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2930 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2931 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2932 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2933 | case LTTNG_SNAPSHOT_RECORD: | |
fb198a11 | 2934 | case LTTNG_SAVE_SESSION: |
d7ba1388 | 2935 | case LTTNG_SET_SESSION_SHM_PATH: |
2e09ba09 | 2936 | need_domain = 0; |
3aace903 | 2937 | break; |
2e09ba09 MD |
2938 | default: |
2939 | need_domain = 1; | |
2940 | } | |
2941 | ||
2942 | if (opt_no_kernel && need_domain | |
2943 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2944 | if (!is_root) { |
f73fabfd | 2945 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2946 | } else { |
f73fabfd | 2947 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2948 | } |
4fba7219 DG |
2949 | goto error; |
2950 | } | |
2951 | ||
8d3113b2 DG |
2952 | /* Deny register consumer if we already have a spawned consumer. */ |
2953 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2954 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2955 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2956 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2957 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2958 | goto error; |
2959 | } | |
2960 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2961 | } | |
2962 | ||
54d01ffb DG |
2963 | /* |
2964 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2965 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2966 | * command. |
2967 | */ | |
2968 | switch(cmd_ctx->lsm->cmd_type) { | |
2969 | case LTTNG_LIST_SESSIONS: | |
2970 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2971 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2972 | case LTTNG_LIST_DOMAINS: |
2973 | case LTTNG_LIST_CHANNELS: | |
2974 | case LTTNG_LIST_EVENTS: | |
834978fd | 2975 | case LTTNG_LIST_SYSCALLS: |
a5dfbb9d | 2976 | case LTTNG_LIST_TRACKER_PIDS: |
54d01ffb DG |
2977 | break; |
2978 | default: | |
2979 | /* Setup lttng message with no payload */ | |
2980 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2981 | if (ret < 0) { | |
2982 | /* This label does not try to unlock the session */ | |
2983 | goto init_setup_error; | |
2984 | } | |
2985 | } | |
2986 | ||
2987 | /* Commands that DO NOT need a session. */ | |
2988 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2989 | case LTTNG_CREATE_SESSION: |
27babd3a | 2990 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2991 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 | 2992 | case LTTNG_CALIBRATE: |
54d01ffb DG |
2993 | case LTTNG_LIST_SESSIONS: |
2994 | case LTTNG_LIST_TRACEPOINTS: | |
834978fd | 2995 | case LTTNG_LIST_SYSCALLS: |
f37d259d | 2996 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
fb198a11 | 2997 | case LTTNG_SAVE_SESSION: |
44d3bd01 | 2998 | need_tracing_session = 0; |
54d01ffb DG |
2999 | break; |
3000 | default: | |
3001 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
3002 | /* |
3003 | * We keep the session list lock across _all_ commands | |
3004 | * for now, because the per-session lock does not | |
3005 | * handle teardown properly. | |
3006 | */ | |
74babd95 | 3007 | session_lock_list(); |
54d01ffb DG |
3008 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
3009 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 3010 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
3011 | goto error; |
3012 | } else { | |
3013 | /* Acquire lock for the session */ | |
3014 | session_lock(cmd_ctx->session); | |
3015 | } | |
3016 | break; | |
3017 | } | |
b389abbe | 3018 | |
5f3ecf22 DG |
3019 | /* |
3020 | * Commands that need a valid session but should NOT create one if none | |
3021 | * exists. Instead of creating one and destroying it when the command is | |
3022 | * handled, process that right before so we save some round trip in useless | |
3023 | * code path. | |
3024 | */ | |
3025 | switch (cmd_ctx->lsm->cmd_type) { | |
3026 | case LTTNG_DISABLE_CHANNEL: | |
3027 | case LTTNG_DISABLE_EVENT: | |
5f3ecf22 DG |
3028 | switch (cmd_ctx->lsm->domain.type) { |
3029 | case LTTNG_DOMAIN_KERNEL: | |
3030 | if (!cmd_ctx->session->kernel_session) { | |
3031 | ret = LTTNG_ERR_NO_CHANNEL; | |
3032 | goto error; | |
3033 | } | |
3034 | break; | |
3035 | case LTTNG_DOMAIN_JUL: | |
5cdb6027 | 3036 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3037 | case LTTNG_DOMAIN_PYTHON: |
5f3ecf22 DG |
3038 | case LTTNG_DOMAIN_UST: |
3039 | if (!cmd_ctx->session->ust_session) { | |
3040 | ret = LTTNG_ERR_NO_CHANNEL; | |
3041 | goto error; | |
3042 | } | |
3043 | break; | |
3044 | default: | |
3045 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3046 | goto error; | |
3047 | } | |
3048 | default: | |
3049 | break; | |
3050 | } | |
3051 | ||
2e09ba09 MD |
3052 | if (!need_domain) { |
3053 | goto skip_domain; | |
3054 | } | |
a4b92340 | 3055 | |
54d01ffb DG |
3056 | /* |
3057 | * Check domain type for specific "pre-action". | |
3058 | */ | |
3059 | switch (cmd_ctx->lsm->domain.type) { | |
3060 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 3061 | if (!is_root) { |
f73fabfd | 3062 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
3063 | goto error; |
3064 | } | |
3065 | ||
54d01ffb | 3066 | /* Kernel tracer check */ |
a4b35e07 | 3067 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3068 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3069 | ret = init_kernel_tracer(); |
3070 | if (ret != 0) { | |
54d01ffb DG |
3071 | goto error; |
3072 | } | |
3073 | } | |
5eb91c98 | 3074 | |
5c827ce0 DG |
3075 | /* Consumer is in an ERROR state. Report back to client */ |
3076 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3077 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3078 | goto error; |
3079 | } | |
3080 | ||
54d01ffb | 3081 | /* Need a session for kernel command */ |
44d3bd01 | 3082 | if (need_tracing_session) { |
54d01ffb | 3083 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3084 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3085 | if (ret < 0) { |
f73fabfd | 3086 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
3087 | goto error; |
3088 | } | |
b389abbe | 3089 | } |
7d29a247 | 3090 | |
54d01ffb | 3091 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3092 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3093 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 3094 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3095 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3096 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3097 | if (ret < 0) { |
f73fabfd | 3098 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 3099 | goto error; |
950131af | 3100 | } |
5c827ce0 | 3101 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
3102 | } else { |
3103 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3104 | } |
173af62f | 3105 | |
a4b92340 DG |
3106 | /* |
3107 | * The consumer was just spawned so we need to add the socket to | |
3108 | * the consumer output of the session if exist. | |
3109 | */ | |
3110 | ret = consumer_create_socket(&kconsumer_data, | |
3111 | cmd_ctx->session->kernel_session->consumer); | |
3112 | if (ret < 0) { | |
3113 | goto error; | |
173af62f | 3114 | } |
0d0c377a | 3115 | } |
5c827ce0 | 3116 | |
54d01ffb | 3117 | break; |
b9dfb167 | 3118 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3119 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3120 | case LTTNG_DOMAIN_PYTHON: |
2bdd86d4 | 3121 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3122 | { |
b51ec5b4 MD |
3123 | if (!ust_app_supported()) { |
3124 | ret = LTTNG_ERR_NO_UST; | |
3125 | goto error; | |
3126 | } | |
5c827ce0 DG |
3127 | /* Consumer is in an ERROR state. Report back to client */ |
3128 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3129 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3130 | goto error; |
3131 | } | |
3132 | ||
44d3bd01 | 3133 | if (need_tracing_session) { |
a4b92340 | 3134 | /* Create UST session if none exist. */ |
f6a9efaa | 3135 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3136 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3137 | &cmd_ctx->lsm->domain); |
f73fabfd | 3138 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
3139 | goto error; |
3140 | } | |
3141 | } | |
00e2e675 | 3142 | |
7753dea8 MD |
3143 | /* Start the UST consumer daemons */ |
3144 | /* 64-bit */ | |
3145 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 3146 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 3147 | ustconsumer64_data.pid == 0 && |
785d2d0d | 3148 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3149 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3150 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3151 | if (ret < 0) { |
f73fabfd | 3152 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 3153 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
3154 | goto error; |
3155 | } | |
48842b30 | 3156 | |
173af62f | 3157 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 3158 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3159 | } else { |
7753dea8 MD |
3160 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3161 | } | |
173af62f DG |
3162 | |
3163 | /* | |
3164 | * Setup socket for consumer 64 bit. No need for atomic access | |
3165 | * since it was set above and can ONLY be set in this thread. | |
3166 | */ | |
a4b92340 DG |
3167 | ret = consumer_create_socket(&ustconsumer64_data, |
3168 | cmd_ctx->session->ust_session->consumer); | |
3169 | if (ret < 0) { | |
3170 | goto error; | |
173af62f DG |
3171 | } |
3172 | ||
7753dea8 | 3173 | /* 32-bit */ |
385b881b | 3174 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); |
fc7a59ce | 3175 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 3176 | ustconsumer32_data.pid == 0 && |
785d2d0d | 3177 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3178 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
3179 | ret = start_consumerd(&ustconsumer32_data); | |
3180 | if (ret < 0) { | |
f73fabfd | 3181 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 3182 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
3183 | goto error; |
3184 | } | |
5c827ce0 | 3185 | |
173af62f | 3186 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 3187 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3188 | } else { |
3189 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3190 | } |
173af62f DG |
3191 | |
3192 | /* | |
3193 | * Setup socket for consumer 64 bit. No need for atomic access | |
3194 | * since it was set above and can ONLY be set in this thread. | |
3195 | */ | |
a4b92340 DG |
3196 | ret = consumer_create_socket(&ustconsumer32_data, |
3197 | cmd_ctx->session->ust_session->consumer); | |
3198 | if (ret < 0) { | |
3199 | goto error; | |
173af62f | 3200 | } |
44d3bd01 DG |
3201 | } |
3202 | break; | |
48842b30 | 3203 | } |
54d01ffb | 3204 | default: |
54d01ffb DG |
3205 | break; |
3206 | } | |
2e09ba09 | 3207 | skip_domain: |
33a2b854 | 3208 | |
5c827ce0 DG |
3209 | /* Validate consumer daemon state when start/stop trace command */ |
3210 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3211 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3212 | switch (cmd_ctx->lsm->domain.type) { | |
b9dfb167 | 3213 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3214 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3215 | case LTTNG_DOMAIN_PYTHON: |
5c827ce0 DG |
3216 | case LTTNG_DOMAIN_UST: |
3217 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3218 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3219 | goto error; |
3220 | } | |
3221 | break; | |
3222 | case LTTNG_DOMAIN_KERNEL: | |
3223 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3224 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3225 | goto error; |
3226 | } | |
3227 | break; | |
3228 | } | |
3229 | } | |
3230 | ||
8e0af1b4 MD |
3231 | /* |
3232 | * Check that the UID or GID match that of the tracing session. | |
3233 | * The root user can interact with all sessions. | |
3234 | */ | |
3235 | if (need_tracing_session) { | |
3236 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3237 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3238 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 3239 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
3240 | goto error; |
3241 | } | |
3242 | } | |
3243 | ||
ffe60014 DG |
3244 | /* |
3245 | * Send relayd information to consumer as soon as we have a domain and a | |
3246 | * session defined. | |
3247 | */ | |
3248 | if (cmd_ctx->session && need_domain) { | |
3249 | /* | |
3250 | * Setup relayd if not done yet. If the relayd information was already | |
3251 | * sent to the consumer, this call will gracefully return. | |
3252 | */ | |
3253 | ret = cmd_setup_relayd(cmd_ctx->session); | |
3254 | if (ret != LTTNG_OK) { | |
3255 | goto error; | |
3256 | } | |
3257 | } | |
3258 | ||
54d01ffb DG |
3259 | /* Process by command type */ |
3260 | switch (cmd_ctx->lsm->cmd_type) { | |
3261 | case LTTNG_ADD_CONTEXT: | |
3262 | { | |
3263 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3264 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 3265 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
3266 | break; |
3267 | } | |
3268 | case LTTNG_DISABLE_CHANNEL: | |
3269 | { | |
3270 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3271 | cmd_ctx->lsm->u.disable.channel_name); | |
3272 | break; | |
3273 | } | |
3274 | case LTTNG_DISABLE_EVENT: | |
3275 | { | |
833984de JG |
3276 | |
3277 | /* | |
3278 | * FIXME: handle filter; for now we just receive the filter's | |
3279 | * bytecode along with the filter expression which are sent by | |
3280 | * liblttng-ctl and discard them. | |
3281 | * | |
3282 | * This fixes an issue where the client may block while sending | |
3283 | * the filter payload and encounter an error because the session | |
3284 | * daemon closes the socket without ever handling this data. | |
3285 | */ | |
3286 | size_t count = cmd_ctx->lsm->u.disable.expression_len + | |
3287 | cmd_ctx->lsm->u.disable.bytecode_len; | |
3288 | ||
3289 | if (count) { | |
3290 | char data[LTTNG_FILTER_MAX_LEN]; | |
3291 | ||
3292 | DBG("Discarding disable event command payload of size %zu", count); | |
3293 | while (count) { | |
3294 | ret = lttcomm_recv_unix_sock(sock, data, | |
3295 | count > sizeof(data) ? sizeof(data) : count); | |
3296 | if (ret < 0) { | |
3297 | goto error; | |
3298 | } | |
3299 | ||
3300 | count -= (size_t) ret; | |
3301 | } | |
3302 | } | |
6e911cad | 3303 | /* FIXME: passing packed structure to non-packed pointer */ |
54d01ffb DG |
3304 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3305 | cmd_ctx->lsm->u.disable.channel_name, | |
6e911cad | 3306 | &cmd_ctx->lsm->u.disable.event); |
33a2b854 DG |
3307 | break; |
3308 | } | |
54d01ffb DG |
3309 | case LTTNG_ENABLE_CHANNEL: |
3310 | { | |
7972aab2 | 3311 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 3312 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
3313 | break; |
3314 | } | |
ccf10263 MD |
3315 | case LTTNG_TRACK_PID: |
3316 | { | |
3317 | ret = cmd_track_pid(cmd_ctx->session, | |
3318 | cmd_ctx->lsm->domain.type, | |
3319 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3320 | break; | |
3321 | } | |
3322 | case LTTNG_UNTRACK_PID: | |
3323 | { | |
3324 | ret = cmd_untrack_pid(cmd_ctx->session, | |
3325 | cmd_ctx->lsm->domain.type, | |
3326 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3327 | break; | |
3328 | } | |
54d01ffb DG |
3329 | case LTTNG_ENABLE_EVENT: |
3330 | { | |
882ef835 JI |
3331 | struct lttng_event_exclusion *exclusion = NULL; |
3332 | struct lttng_filter_bytecode *bytecode = NULL; | |
6b453b5e | 3333 | char *filter_expression = NULL; |
882ef835 | 3334 | |
67676bd8 DG |
3335 | /* Handle exclusion events and receive it from the client. */ |
3336 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3337 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3338 | ||
3339 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3340 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3341 | if (!exclusion) { | |
3342 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3343 | goto error; | |
882ef835 | 3344 | } |
882ef835 | 3345 | |
67676bd8 DG |
3346 | DBG("Receiving var len exclusion event list from client ..."); |
3347 | exclusion->count = count; | |
3348 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3349 | count * LTTNG_SYMBOL_NAME_LEN); | |
3350 | if (ret <= 0) { | |
3351 | DBG("Nothing recv() from client var len data... continuing"); | |
3352 | *sock_error = 1; | |
3353 | free(exclusion); | |
3354 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3355 | goto error; | |
3356 | } | |
3357 | } | |
3358 | ||
6b453b5e JG |
3359 | /* Get filter expression from client. */ |
3360 | if (cmd_ctx->lsm->u.enable.expression_len > 0) { | |
3361 | size_t expression_len = | |
3362 | cmd_ctx->lsm->u.enable.expression_len; | |
3363 | ||
3364 | if (expression_len > LTTNG_FILTER_MAX_LEN) { | |
3365 | ret = LTTNG_ERR_FILTER_INVAL; | |
3366 | free(exclusion); | |
3367 | goto error; | |
3368 | } | |
3369 | ||
3370 | filter_expression = zmalloc(expression_len); | |
3371 | if (!filter_expression) { | |
3372 | free(exclusion); | |
3373 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3374 | goto error; | |
3375 | } | |
3376 | ||
3377 | /* Receive var. len. data */ | |
3378 | DBG("Receiving var len filter's expression from client ..."); | |
3379 | ret = lttcomm_recv_unix_sock(sock, filter_expression, | |
3380 | expression_len); | |
3381 | if (ret <= 0) { | |
3382 | DBG("Nothing recv() from client car len data... continuing"); | |
3383 | *sock_error = 1; | |
3384 | free(filter_expression); | |
3385 | free(exclusion); | |
3386 | ret = LTTNG_ERR_FILTER_INVAL; | |
3387 | goto error; | |
3388 | } | |
3389 | } | |
3390 | ||
67676bd8 DG |
3391 | /* Handle filter and get bytecode from client. */ |
3392 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3393 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3394 | ||
3395 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3396 | ret = LTTNG_ERR_FILTER_INVAL; | |
49d21f93 | 3397 | free(filter_expression); |
67676bd8 DG |
3398 | free(exclusion); |
3399 | goto error; | |
3400 | } | |
3401 | ||
3402 | bytecode = zmalloc(bytecode_len); | |
3403 | if (!bytecode) { | |
49d21f93 | 3404 | free(filter_expression); |
67676bd8 DG |
3405 | free(exclusion); |
3406 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3407 | goto error; | |
882ef835 JI |
3408 | } |
3409 | ||
67676bd8 DG |
3410 | /* Receive var. len. data */ |
3411 | DBG("Receiving var len filter's bytecode from client ..."); | |
3412 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3413 | if (ret <= 0) { | |
3414 | DBG("Nothing recv() from client car len data... continuing"); | |
3415 | *sock_error = 1; | |
49d21f93 | 3416 | free(filter_expression); |
67676bd8 DG |
3417 | free(bytecode); |
3418 | free(exclusion); | |
3419 | ret = LTTNG_ERR_FILTER_INVAL; | |
3420 | goto error; | |
3421 | } | |
3422 | ||
3423 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
49d21f93 | 3424 | free(filter_expression); |
67676bd8 DG |
3425 | free(bytecode); |
3426 | free(exclusion); | |
3427 | ret = LTTNG_ERR_FILTER_INVAL; | |
3428 | goto error; | |
3429 | } | |
882ef835 | 3430 | } |
67676bd8 DG |
3431 | |
3432 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3433 | cmd_ctx->lsm->u.enable.channel_name, | |
6b453b5e JG |
3434 | &cmd_ctx->lsm->u.enable.event, |
3435 | filter_expression, bytecode, exclusion, | |
67676bd8 | 3436 | kernel_poll_pipe[1]); |
54d01ffb DG |
3437 | break; |
3438 | } | |
052da939 | 3439 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3440 | { |
9f19cc17 | 3441 | struct lttng_event *events; |
54d01ffb | 3442 | ssize_t nb_events; |
052da939 | 3443 | |
0845bbfa | 3444 | session_lock_list(); |
54d01ffb | 3445 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
0845bbfa | 3446 | session_unlock_list(); |
54d01ffb | 3447 | if (nb_events < 0) { |
f73fabfd | 3448 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3449 | ret = -nb_events; |
3450 | goto error; | |
2ef84c95 DG |
3451 | } |
3452 | ||
3453 | /* | |
3454 | * Setup lttng message with payload size set to the event list size in | |
3455 | * bytes and then copy list into the llm payload. | |
3456 | */ | |
052da939 | 3457 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3458 | if (ret < 0) { |
052da939 | 3459 | free(events); |
2ef84c95 DG |
3460 | goto setup_error; |
3461 | } | |
3462 | ||
3463 | /* Copy event list into message payload */ | |
9f19cc17 | 3464 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3465 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3466 | |
9f19cc17 | 3467 | free(events); |
2ef84c95 | 3468 | |
f73fabfd | 3469 | ret = LTTNG_OK; |
2ef84c95 DG |
3470 | break; |
3471 | } | |
f37d259d MD |
3472 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3473 | { | |
3474 | struct lttng_event_field *fields; | |
3475 | ssize_t nb_fields; | |
3476 | ||
0845bbfa | 3477 | session_lock_list(); |
a4b92340 DG |
3478 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3479 | &fields); | |
0845bbfa | 3480 | session_unlock_list(); |
f37d259d | 3481 | if (nb_fields < 0) { |
f73fabfd | 3482 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3483 | ret = -nb_fields; |
3484 | goto error; | |
3485 | } | |
3486 | ||
3487 | /* | |
3488 | * Setup lttng message with payload size set to the event list size in | |
3489 | * bytes and then copy list into the llm payload. | |
3490 | */ | |
a4b92340 DG |
3491 | ret = setup_lttng_msg(cmd_ctx, |
3492 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
3493 | if (ret < 0) { |
3494 | free(fields); | |
3495 | goto setup_error; | |
3496 | } | |
3497 | ||
3498 | /* Copy event list into message payload */ | |
3499 | memcpy(cmd_ctx->llm->payload, fields, | |
3500 | sizeof(struct lttng_event_field) * nb_fields); | |
3501 | ||
3502 | free(fields); | |
3503 | ||
f73fabfd | 3504 | ret = LTTNG_OK; |
f37d259d MD |
3505 | break; |
3506 | } | |
834978fd DG |
3507 | case LTTNG_LIST_SYSCALLS: |
3508 | { | |
3509 | struct lttng_event *events; | |
3510 | ssize_t nb_events; | |
3511 | ||
3512 | nb_events = cmd_list_syscalls(&events); | |
3513 | if (nb_events < 0) { | |
3514 | /* Return value is a negative lttng_error_code. */ | |
3515 | ret = -nb_events; | |
3516 | goto error; | |
3517 | } | |
3518 | ||
3519 | /* | |
3520 | * Setup lttng message with payload size set to the event list size in | |
3521 | * bytes and then copy list into the llm payload. | |
3522 | */ | |
3523 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); | |
3524 | if (ret < 0) { | |
3525 | free(events); | |
3526 | goto setup_error; | |
3527 | } | |
3528 | ||
3529 | /* Copy event list into message payload */ | |
3530 | memcpy(cmd_ctx->llm->payload, events, | |
3531 | sizeof(struct lttng_event) * nb_events); | |
3532 | ||
3533 | free(events); | |
3534 | ||
3535 | ret = LTTNG_OK; | |
3536 | break; | |
3537 | } | |
a5dfbb9d MD |
3538 | case LTTNG_LIST_TRACKER_PIDS: |
3539 | { | |
3540 | int32_t *pids = NULL; | |
3541 | ssize_t nr_pids; | |
3542 | ||
3543 | nr_pids = cmd_list_tracker_pids(cmd_ctx->session, | |
3544 | cmd_ctx->lsm->domain.type, &pids); | |
3545 | if (nr_pids < 0) { | |
3546 | /* Return value is a negative lttng_error_code. */ | |
3547 | ret = -nr_pids; | |
3548 | goto error; | |
3549 | } | |
3550 | ||
3551 | /* | |
3552 | * Setup lttng message with payload size set to the event list size in | |
3553 | * bytes and then copy list into the llm payload. | |
3554 | */ | |
3555 | ret = setup_lttng_msg(cmd_ctx, sizeof(int32_t) * nr_pids); | |
3556 | if (ret < 0) { | |
3557 | free(pids); | |
3558 | goto setup_error; | |
3559 | } | |
3560 | ||
3561 | /* Copy event list into message payload */ | |
3562 | memcpy(cmd_ctx->llm->payload, pids, | |
3563 | sizeof(int) * nr_pids); | |
3564 | ||
3565 | free(pids); | |
3566 | ||
3567 | ret = LTTNG_OK; | |
3568 | break; | |
3569 | } | |
00e2e675 DG |
3570 | case LTTNG_SET_CONSUMER_URI: |
3571 | { | |
a4b92340 DG |
3572 | size_t nb_uri, len; |
3573 | struct lttng_uri *uris; | |
3574 | ||
3575 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3576 | len = nb_uri * sizeof(struct lttng_uri); | |
3577 | ||
3578 | if (nb_uri == 0) { | |
f73fabfd | 3579 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3580 | goto error; |
3581 | } | |
3582 | ||
3583 | uris = zmalloc(len); | |
3584 | if (uris == NULL) { | |
f73fabfd | 3585 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3586 | goto error; |
3587 | } | |
3588 | ||
3589 | /* Receive variable len data */ | |
77c7c900 | 3590 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3591 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3592 | if (ret <= 0) { | |
3593 | DBG("No URIs received from client... continuing"); | |
3594 | *sock_error = 1; | |
f73fabfd | 3595 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3596 | free(uris); |
a4b92340 DG |
3597 | goto error; |
3598 | } | |
3599 | ||
bda32d56 JG |
3600 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); |
3601 | free(uris); | |
f73fabfd | 3602 | if (ret != LTTNG_OK) { |
a4b92340 DG |
3603 | goto error; |
3604 | } | |
3605 | ||
b1d41407 | 3606 | |
00e2e675 DG |
3607 | break; |
3608 | } | |
f3ed775e | 3609 | case LTTNG_START_TRACE: |
8c0faa1d | 3610 | { |
54d01ffb | 3611 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3612 | break; |
3613 | } | |
f3ed775e | 3614 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3615 | { |
54d01ffb | 3616 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3617 | break; |
3618 | } | |
5e16da05 MD |
3619 | case LTTNG_CREATE_SESSION: |
3620 | { | |
a4b92340 DG |
3621 | size_t nb_uri, len; |
3622 | struct lttng_uri *uris = NULL; | |
3623 | ||
3624 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3625 | len = nb_uri * sizeof(struct lttng_uri); | |
3626 | ||
3627 | if (nb_uri > 0) { | |
3628 | uris = zmalloc(len); | |
3629 | if (uris == NULL) { | |
f73fabfd | 3630 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3631 | goto error; |
3632 | } | |
3633 | ||
3634 | /* Receive variable len data */ | |
77c7c900 | 3635 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3636 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3637 | if (ret <= 0) { | |
3638 | DBG("No URIs received from client... continuing"); | |
3639 | *sock_error = 1; | |
f73fabfd | 3640 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3641 | free(uris); |
a4b92340 DG |
3642 | goto error; |
3643 | } | |
3644 | ||
3645 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3646 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3647 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3648 | free(uris); |
a4b92340 DG |
3649 | goto error; |
3650 | } | |
3651 | } | |
3652 | ||
3653 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3654 | &cmd_ctx->creds, 0); |
a4b92340 | 3655 | |
b1d41407 DG |
3656 | free(uris); |
3657 | ||
00e2e675 DG |
3658 | break; |
3659 | } | |
5e16da05 MD |
3660 | case LTTNG_DESTROY_SESSION: |
3661 | { | |
2f77fc4b | 3662 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3663 | |
3664 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3665 | cmd_ctx->session = NULL; |
5461b305 | 3666 | break; |
5e16da05 | 3667 | } |
9f19cc17 | 3668 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3669 | { |
54d01ffb | 3670 | ssize_t nb_dom; |
fa64dfb4 | 3671 | struct lttng_domain *domains = NULL; |
5461b305 | 3672 | |
54d01ffb DG |
3673 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3674 | if (nb_dom < 0) { | |
f73fabfd | 3675 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3676 | ret = -nb_dom; |
3677 | goto error; | |
ce3d728c | 3678 | } |
520ff687 | 3679 | |
54d01ffb | 3680 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 | 3681 | if (ret < 0) { |
ae9c20bc | 3682 | free(domains); |
5461b305 | 3683 | goto setup_error; |
520ff687 | 3684 | } |
57167058 | 3685 | |
54d01ffb DG |
3686 | /* Copy event list into message payload */ |
3687 | memcpy(cmd_ctx->llm->payload, domains, | |
3688 | nb_dom * sizeof(struct lttng_domain)); | |
3689 | ||
3690 | free(domains); | |
5e16da05 | 3691 | |
f73fabfd | 3692 | ret = LTTNG_OK; |
5e16da05 MD |
3693 | break; |
3694 | } | |
9f19cc17 | 3695 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3696 | { |
6775595e | 3697 | int nb_chan; |
ade7ce52 | 3698 | struct lttng_channel *channels = NULL; |
54d01ffb | 3699 | |
b551a063 DG |
3700 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3701 | cmd_ctx->session, &channels); | |
54d01ffb | 3702 | if (nb_chan < 0) { |
f73fabfd | 3703 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3704 | ret = -nb_chan; |
3705 | goto error; | |
5461b305 | 3706 | } |
ca95a216 | 3707 | |
54d01ffb | 3708 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 | 3709 | if (ret < 0) { |
ae9c20bc | 3710 | free(channels); |
5461b305 DG |
3711 | goto setup_error; |
3712 | } | |
9f19cc17 | 3713 | |
54d01ffb DG |
3714 | /* Copy event list into message payload */ |
3715 | memcpy(cmd_ctx->llm->payload, channels, | |
3716 | nb_chan * sizeof(struct lttng_channel)); | |
3717 | ||
3718 | free(channels); | |
9f19cc17 | 3719 | |
f73fabfd | 3720 | ret = LTTNG_OK; |
5461b305 | 3721 | break; |
5e16da05 | 3722 | } |
9f19cc17 | 3723 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3724 | { |
b551a063 | 3725 | ssize_t nb_event; |
684d34d2 | 3726 | struct lttng_event *events = NULL; |
9f19cc17 | 3727 | |
b551a063 | 3728 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3729 | cmd_ctx->lsm->u.list.channel_name, &events); |
3730 | if (nb_event < 0) { | |
f73fabfd | 3731 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3732 | ret = -nb_event; |
3733 | goto error; | |
5461b305 | 3734 | } |
ca95a216 | 3735 | |
54d01ffb | 3736 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 | 3737 | if (ret < 0) { |
ae9c20bc | 3738 | free(events); |
5461b305 DG |
3739 | goto setup_error; |
3740 | } | |
9f19cc17 | 3741 | |
54d01ffb DG |
3742 | /* Copy event list into message payload */ |
3743 | memcpy(cmd_ctx->llm->payload, events, | |
3744 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3745 | |
54d01ffb | 3746 | free(events); |
9f19cc17 | 3747 | |
f73fabfd | 3748 | ret = LTTNG_OK; |
5461b305 | 3749 | break; |
5e16da05 MD |
3750 | } |
3751 | case LTTNG_LIST_SESSIONS: | |
3752 | { | |
8e0af1b4 | 3753 | unsigned int nr_sessions; |
5461b305 | 3754 | |
8e0af1b4 | 3755 | session_lock_list(); |
730389d9 DG |
3756 | nr_sessions = lttng_sessions_count( |
3757 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3758 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3759 | |
8e0af1b4 | 3760 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3761 | if (ret < 0) { |
54d01ffb | 3762 | session_unlock_list(); |
5461b305 | 3763 | goto setup_error; |
e065084a | 3764 | } |
5e16da05 | 3765 | |
6c9cc2ab | 3766 | /* Filled the session array */ |
2f77fc4b | 3767 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3768 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3769 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3770 | |
54d01ffb | 3771 | session_unlock_list(); |
5e16da05 | 3772 | |
f73fabfd | 3773 | ret = LTTNG_OK; |
5e16da05 MD |
3774 | break; |
3775 | } | |
d0254c7c MD |
3776 | case LTTNG_CALIBRATE: |
3777 | { | |
54d01ffb DG |
3778 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3779 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3780 | break; |
3781 | } | |
d9800920 DG |
3782 | case LTTNG_REGISTER_CONSUMER: |
3783 | { | |
2f77fc4b DG |
3784 | struct consumer_data *cdata; |
3785 | ||
3786 | switch (cmd_ctx->lsm->domain.type) { | |
3787 | case LTTNG_DOMAIN_KERNEL: | |
3788 | cdata = &kconsumer_data; | |
3789 | break; | |
3790 | default: | |
f73fabfd | 3791 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3792 | goto error; |
3793 | } | |
3794 | ||
54d01ffb | 3795 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3796 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3797 | break; |
3798 | } | |
6d805429 | 3799 | case LTTNG_DATA_PENDING: |
806e2684 | 3800 | { |
6d805429 | 3801 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
3802 | break; |
3803 | } | |
da3c9ec1 DG |
3804 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3805 | { | |
6dc3064a DG |
3806 | struct lttcomm_lttng_output_id reply; |
3807 | ||
3808 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3809 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3810 | if (ret != LTTNG_OK) { | |
3811 | goto error; | |
3812 | } | |
3813 | ||
3814 | ret = setup_lttng_msg(cmd_ctx, sizeof(reply)); | |
3815 | if (ret < 0) { | |
3816 | goto setup_error; | |
3817 | } | |
3818 | ||
3819 | /* Copy output list into message payload */ | |
3820 | memcpy(cmd_ctx->llm->payload, &reply, sizeof(reply)); | |
3821 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3822 | break; |
3823 | } | |
3824 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3825 | { | |
6dc3064a DG |
3826 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3827 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3828 | break; |
3829 | } | |
3830 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3831 | { | |
6dc3064a DG |
3832 | ssize_t nb_output; |
3833 | struct lttng_snapshot_output *outputs = NULL; | |
3834 | ||
3835 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
3836 | if (nb_output < 0) { | |
3837 | ret = -nb_output; | |
3838 | goto error; | |
3839 | } | |
3840 | ||
3841 | ret = setup_lttng_msg(cmd_ctx, | |
3842 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3843 | if (ret < 0) { | |
3844 | free(outputs); | |
3845 | goto setup_error; | |
3846 | } | |
3847 | ||
3848 | if (outputs) { | |
3849 | /* Copy output list into message payload */ | |
3850 | memcpy(cmd_ctx->llm->payload, outputs, | |
3851 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3852 | free(outputs); | |
3853 | } | |
3854 | ||
3855 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3856 | break; |
3857 | } | |
3858 | case LTTNG_SNAPSHOT_RECORD: | |
3859 | { | |
6dc3064a DG |
3860 | ret = cmd_snapshot_record(cmd_ctx->session, |
3861 | &cmd_ctx->lsm->u.snapshot_record.output, | |
3862 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
3863 | break; |
3864 | } | |
27babd3a DG |
3865 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
3866 | { | |
3867 | size_t nb_uri, len; | |
3868 | struct lttng_uri *uris = NULL; | |
3869 | ||
3870 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3871 | len = nb_uri * sizeof(struct lttng_uri); | |
3872 | ||
3873 | if (nb_uri > 0) { | |
3874 | uris = zmalloc(len); | |
3875 | if (uris == NULL) { | |
3876 | ret = LTTNG_ERR_FATAL; | |
3877 | goto error; | |
3878 | } | |
3879 | ||
3880 | /* Receive variable len data */ | |
3881 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3882 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3883 | if (ret <= 0) { | |
3884 | DBG("No URIs received from client... continuing"); | |
3885 | *sock_error = 1; | |
3886 | ret = LTTNG_ERR_SESSION_FAIL; | |
3887 | free(uris); | |
3888 | goto error; | |
3889 | } | |
3890 | ||
3891 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3892 | DBG("Creating session with ONE network URI is a bad call"); | |
3893 | ret = LTTNG_ERR_SESSION_FAIL; | |
3894 | free(uris); | |
3895 | goto error; | |
3896 | } | |
3897 | } | |
3898 | ||
3899 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
3900 | nb_uri, &cmd_ctx->creds); | |
3901 | free(uris); | |
3902 | break; | |
3903 | } | |
ecc48a90 JD |
3904 | case LTTNG_CREATE_SESSION_LIVE: |
3905 | { | |
3906 | size_t nb_uri, len; | |
3907 | struct lttng_uri *uris = NULL; | |
3908 | ||
3909 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3910 | len = nb_uri * sizeof(struct lttng_uri); | |
3911 | ||
3912 | if (nb_uri > 0) { | |
3913 | uris = zmalloc(len); | |
3914 | if (uris == NULL) { | |
3915 | ret = LTTNG_ERR_FATAL; | |
3916 | goto error; | |
3917 | } | |
3918 | ||
3919 | /* Receive variable len data */ | |
3920 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3921 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3922 | if (ret <= 0) { | |
3923 | DBG("No URIs received from client... continuing"); | |
3924 | *sock_error = 1; | |
3925 | ret = LTTNG_ERR_SESSION_FAIL; | |
3926 | free(uris); | |
3927 | goto error; | |
3928 | } | |
3929 | ||
3930 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3931 | DBG("Creating session with ONE network URI is a bad call"); | |
3932 | ret = LTTNG_ERR_SESSION_FAIL; | |
3933 | free(uris); | |
3934 | goto error; | |
3935 | } | |
3936 | } | |
3937 | ||
3938 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
3939 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
3940 | free(uris); | |
3941 | break; | |
3942 | } | |
fb198a11 JG |
3943 | case LTTNG_SAVE_SESSION: |
3944 | { | |
3945 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
3946 | &cmd_ctx->creds); | |
3947 | break; | |
3948 | } | |
d7ba1388 MD |
3949 | case LTTNG_SET_SESSION_SHM_PATH: |
3950 | { | |
3951 | ret = cmd_set_session_shm_path(cmd_ctx->session, | |
3952 | cmd_ctx->lsm->u.set_shm_path.shm_path); | |
3953 | break; | |
3954 | } | |
5e16da05 | 3955 | default: |
f73fabfd | 3956 | ret = LTTNG_ERR_UND; |
5461b305 | 3957 | break; |
fac6795d DG |
3958 | } |
3959 | ||
5461b305 | 3960 | error: |
5461b305 DG |
3961 | if (cmd_ctx->llm == NULL) { |
3962 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3963 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3964 | goto setup_error; |
3965 | } | |
3966 | } | |
54d01ffb | 3967 | /* Set return code */ |
5461b305 | 3968 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3969 | setup_error: |
b5541356 | 3970 | if (cmd_ctx->session) { |
54d01ffb | 3971 | session_unlock(cmd_ctx->session); |
b5541356 | 3972 | } |
256a5576 MD |
3973 | if (need_tracing_session) { |
3974 | session_unlock_list(); | |
3975 | } | |
54d01ffb | 3976 | init_setup_error: |
8028d920 | 3977 | return ret; |
fac6795d DG |
3978 | } |
3979 | ||
44a5e5eb DG |
3980 | /* |
3981 | * Thread managing health check socket. | |
3982 | */ | |
3983 | static void *thread_manage_health(void *data) | |
3984 | { | |
eb4a2943 | 3985 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
3986 | uint32_t revents, nb_fd; |
3987 | struct lttng_poll_event events; | |
0c89d795 MD |
3988 | struct health_comm_msg msg; |
3989 | struct health_comm_reply reply; | |
44a5e5eb DG |
3990 | |
3991 | DBG("[thread] Manage health check started"); | |
3992 | ||
3993 | rcu_register_thread(); | |
3994 | ||
6d737ce4 DG |
3995 | /* We might hit an error path before this is created. */ |
3996 | lttng_poll_init(&events); | |
3cc04881 | 3997 | |
44a5e5eb DG |
3998 | /* Create unix socket */ |
3999 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
4000 | if (sock < 0) { | |
4001 | ERR("Unable to create health check Unix socket"); | |
4002 | ret = -1; | |
4003 | goto error; | |
4004 | } | |
4005 | ||
6c71277b MD |
4006 | if (is_root) { |
4007 | /* lttng health client socket path permissions */ | |
4008 | ret = chown(health_unix_sock_path, 0, | |
4009 | utils_get_group_id(tracing_group_name)); | |
4010 | if (ret < 0) { | |
4011 | ERR("Unable to set group on %s", health_unix_sock_path); | |
4012 | PERROR("chown"); | |
4013 | ret = -1; | |
4014 | goto error; | |
4015 | } | |
4016 | ||
4017 | ret = chmod(health_unix_sock_path, | |
4018 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4019 | if (ret < 0) { | |
4020 | ERR("Unable to set permissions on %s", health_unix_sock_path); | |
4021 | PERROR("chmod"); | |
4022 | ret = -1; | |
4023 | goto error; | |
4024 | } | |
4025 | } | |
4026 | ||
b662582b DG |
4027 | /* |
4028 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4029 | * show must go on. | |
4030 | */ | |
4031 | (void) utils_set_fd_cloexec(sock); | |
4032 | ||
44a5e5eb DG |
4033 | ret = lttcomm_listen_unix_sock(sock); |
4034 | if (ret < 0) { | |
4035 | goto error; | |
4036 | } | |
4037 | ||
4038 | /* | |
4039 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4040 | * more will be added to this poll set. | |
4041 | */ | |
d0b96690 | 4042 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
4043 | if (ret < 0) { |
4044 | goto error; | |
4045 | } | |
4046 | ||
4047 | /* Add the application registration socket */ | |
4048 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
4049 | if (ret < 0) { | |
4050 | goto error; | |
4051 | } | |
4052 | ||
ef367a93 | 4053 | sessiond_notify_ready(); |
97bc1426 | 4054 | |
44a5e5eb DG |
4055 | while (1) { |
4056 | DBG("Health check ready"); | |
4057 | ||
44a5e5eb DG |
4058 | /* Inifinite blocking call, waiting for transmission */ |
4059 | restart: | |
4060 | ret = lttng_poll_wait(&events, -1); | |
4061 | if (ret < 0) { | |
4062 | /* | |
4063 | * Restart interrupted system call. | |
4064 | */ | |
4065 | if (errno == EINTR) { | |
4066 | goto restart; | |
4067 | } | |
4068 | goto error; | |
4069 | } | |
4070 | ||
0d9c5d77 DG |
4071 | nb_fd = ret; |
4072 | ||
44a5e5eb DG |
4073 | for (i = 0; i < nb_fd; i++) { |
4074 | /* Fetch once the poll data */ | |
4075 | revents = LTTNG_POLL_GETEV(&events, i); | |
4076 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4077 | ||
fd20dac9 MD |
4078 | if (!revents) { |
4079 | /* No activity for this FD (poll implementation). */ | |
4080 | continue; | |
4081 | } | |
4082 | ||
44a5e5eb | 4083 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4084 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 4085 | if (ret) { |
139ac872 MD |
4086 | err = 0; |
4087 | goto exit; | |
44a5e5eb DG |
4088 | } |
4089 | ||
4090 | /* Event on the registration socket */ | |
4091 | if (pollfd == sock) { | |
4092 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
4093 | ERR("Health socket poll error"); | |
4094 | goto error; | |
4095 | } | |
4096 | } | |
4097 | } | |
4098 | ||
4099 | new_sock = lttcomm_accept_unix_sock(sock); | |
4100 | if (new_sock < 0) { | |
4101 | goto error; | |
4102 | } | |
4103 | ||
b662582b DG |
4104 | /* |
4105 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4106 | * show must go on. | |
4107 | */ | |
4108 | (void) utils_set_fd_cloexec(new_sock); | |
4109 | ||
44a5e5eb DG |
4110 | DBG("Receiving data from client for health..."); |
4111 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
4112 | if (ret <= 0) { | |
4113 | DBG("Nothing recv() from client... continuing"); | |
4114 | ret = close(new_sock); | |
4115 | if (ret) { | |
4116 | PERROR("close"); | |
4117 | } | |
4118 | new_sock = -1; | |
4119 | continue; | |
4120 | } | |
4121 | ||
4122 | rcu_thread_online(); | |
4123 | ||
53efb85a | 4124 | memset(&reply, 0, sizeof(reply)); |
6c71277b MD |
4125 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { |
4126 | /* | |
4127 | * health_check_state returns 0 if health is | |
4128 | * bad. | |
4129 | */ | |
4130 | if (!health_check_state(health_sessiond, i)) { | |
4131 | reply.ret_code |= 1ULL << i; | |
4132 | } | |
44a5e5eb DG |
4133 | } |
4134 | ||
6c71277b | 4135 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
4136 | |
4137 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
4138 | if (ret < 0) { | |
4139 | ERR("Failed to send health data back to client"); | |
4140 | } | |
4141 | ||
4142 | /* End of transmission */ | |
4143 | ret = close(new_sock); | |
4144 | if (ret) { | |
4145 | PERROR("close"); | |
4146 | } | |
4147 | new_sock = -1; | |
4148 | } | |
4149 | ||
139ac872 | 4150 | exit: |
44a5e5eb | 4151 | error: |
139ac872 MD |
4152 | if (err) { |
4153 | ERR("Health error occurred in %s", __func__); | |
4154 | } | |
44a5e5eb DG |
4155 | DBG("Health check thread dying"); |
4156 | unlink(health_unix_sock_path); | |
4157 | if (sock >= 0) { | |
4158 | ret = close(sock); | |
4159 | if (ret) { | |
4160 | PERROR("close"); | |
4161 | } | |
4162 | } | |
44a5e5eb DG |
4163 | |
4164 | lttng_poll_clean(&events); | |
4165 | ||
4166 | rcu_unregister_thread(); | |
4167 | return NULL; | |
4168 | } | |
4169 | ||
1d4b027a | 4170 | /* |
d063d709 DG |
4171 | * This thread manage all clients request using the unix client socket for |
4172 | * communication. | |
1d4b027a DG |
4173 | */ |
4174 | static void *thread_manage_clients(void *data) | |
4175 | { | |
139ac872 | 4176 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 4177 | int sock_error; |
5eb91c98 | 4178 | uint32_t revents, nb_fd; |
273ea72c | 4179 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 4180 | struct lttng_poll_event events; |
1d4b027a DG |
4181 | |
4182 | DBG("[thread] Manage client started"); | |
4183 | ||
f6a9efaa DG |
4184 | rcu_register_thread(); |
4185 | ||
6c71277b | 4186 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 4187 | |
840cb59c | 4188 | health_code_update(); |
44a5e5eb | 4189 | |
1d4b027a DG |
4190 | ret = lttcomm_listen_unix_sock(client_sock); |
4191 | if (ret < 0) { | |
35df2755 | 4192 | goto error_listen; |
1d4b027a DG |
4193 | } |
4194 | ||
5eb91c98 DG |
4195 | /* |
4196 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4197 | * more will be added to this poll set. | |
4198 | */ | |
d0b96690 | 4199 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 4200 | if (ret < 0) { |
35df2755 | 4201 | goto error_create_poll; |
5eb91c98 | 4202 | } |
273ea72c | 4203 | |
5eb91c98 DG |
4204 | /* Add the application registration socket */ |
4205 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
4206 | if (ret < 0) { | |
4207 | goto error; | |
4208 | } | |
273ea72c | 4209 | |
ef367a93 JG |
4210 | sessiond_notify_ready(); |
4211 | ret = sem_post(&load_info->message_thread_ready); | |
4212 | if (ret) { | |
4213 | PERROR("sem_post message_thread_ready"); | |
4214 | goto error; | |
4215 | } | |
0bb7724a | 4216 | |
72453c8c MD |
4217 | /* This testpoint is after we signal readiness to the parent. */ |
4218 | if (testpoint(sessiond_thread_manage_clients)) { | |
4219 | goto error; | |
4220 | } | |
4221 | ||
e547b070 | 4222 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
4223 | goto error; |
4224 | } | |
8ac94142 | 4225 | |
840cb59c | 4226 | health_code_update(); |
44a5e5eb | 4227 | |
1d4b027a | 4228 | while (1) { |
1d4b027a | 4229 | DBG("Accepting client command ..."); |
273ea72c DG |
4230 | |
4231 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 4232 | restart: |
a78af745 | 4233 | health_poll_entry(); |
5eb91c98 | 4234 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 4235 | health_poll_exit(); |
273ea72c | 4236 | if (ret < 0) { |
88f2b785 MD |
4237 | /* |
4238 | * Restart interrupted system call. | |
4239 | */ | |
4240 | if (errno == EINTR) { | |
4241 | goto restart; | |
4242 | } | |
273ea72c DG |
4243 | goto error; |
4244 | } | |
4245 | ||
0d9c5d77 DG |
4246 | nb_fd = ret; |
4247 | ||
5eb91c98 DG |
4248 | for (i = 0; i < nb_fd; i++) { |
4249 | /* Fetch once the poll data */ | |
4250 | revents = LTTNG_POLL_GETEV(&events, i); | |
4251 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4252 | ||
840cb59c | 4253 | health_code_update(); |
44a5e5eb | 4254 | |
fd20dac9 MD |
4255 | if (!revents) { |
4256 | /* No activity for this FD (poll implementation). */ | |
4257 | continue; | |
4258 | } | |
4259 | ||
5eb91c98 | 4260 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4261 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 4262 | if (ret) { |
139ac872 MD |
4263 | err = 0; |
4264 | goto exit; | |
5eb91c98 DG |
4265 | } |
4266 | ||
4267 | /* Event on the registration socket */ | |
4268 | if (pollfd == client_sock) { | |
4269 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
4270 | ERR("Client socket poll error"); | |
4271 | goto error; | |
4272 | } | |
4273 | } | |
4274 | } | |
4275 | ||
4276 | DBG("Wait for client response"); | |
4277 | ||
840cb59c | 4278 | health_code_update(); |
44a5e5eb | 4279 | |
5eb91c98 DG |
4280 | sock = lttcomm_accept_unix_sock(client_sock); |
4281 | if (sock < 0) { | |
273ea72c | 4282 | goto error; |
273ea72c DG |
4283 | } |
4284 | ||
b662582b DG |
4285 | /* |
4286 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4287 | * show must go on. | |
4288 | */ | |
4289 | (void) utils_set_fd_cloexec(sock); | |
4290 | ||
be040666 DG |
4291 | /* Set socket option for credentials retrieval */ |
4292 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
4293 | if (ret < 0) { | |
4294 | goto error; | |
4295 | } | |
4296 | ||
5eb91c98 | 4297 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 4298 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 4299 | if (cmd_ctx == NULL) { |
76d7553f | 4300 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 4301 | goto error; |
5eb91c98 | 4302 | } |
1d4b027a | 4303 | |
5eb91c98 | 4304 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 4305 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 4306 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 4307 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
4308 | goto error; |
4309 | } | |
1d4b027a | 4310 | |
5eb91c98 DG |
4311 | cmd_ctx->llm = NULL; |
4312 | cmd_ctx->session = NULL; | |
1d4b027a | 4313 | |
840cb59c | 4314 | health_code_update(); |
44a5e5eb | 4315 | |
5eb91c98 DG |
4316 | /* |
4317 | * Data is received from the lttng client. The struct | |
4318 | * lttcomm_session_msg (lsm) contains the command and data request of | |
4319 | * the client. | |
4320 | */ | |
4321 | DBG("Receiving data from client ..."); | |
be040666 DG |
4322 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
4323 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
4324 | if (ret <= 0) { |
4325 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
4326 | ret = close(sock); |
4327 | if (ret) { | |
4328 | PERROR("close"); | |
4329 | } | |
4330 | sock = -1; | |
a2c0da86 | 4331 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4332 | continue; |
4333 | } | |
1d4b027a | 4334 | |
840cb59c | 4335 | health_code_update(); |
44a5e5eb | 4336 | |
5eb91c98 DG |
4337 | // TODO: Validate cmd_ctx including sanity check for |
4338 | // security purpose. | |
f7776ea7 | 4339 | |
f6a9efaa | 4340 | rcu_thread_online(); |
5eb91c98 DG |
4341 | /* |
4342 | * This function dispatch the work to the kernel or userspace tracer | |
4343 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
4344 | * informations for the client. The command context struct contains | |
4345 | * everything this function may needs. | |
4346 | */ | |
53a80697 | 4347 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 4348 | rcu_thread_offline(); |
5eb91c98 | 4349 | if (ret < 0) { |
36134aa1 DG |
4350 | ret = close(sock); |
4351 | if (ret) { | |
4352 | PERROR("close"); | |
53a80697 | 4353 | } |
36134aa1 | 4354 | sock = -1; |
bbd973c2 | 4355 | /* |
5eb91c98 | 4356 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 4357 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
4358 | * (ENOMEM). Error detected but still accept |
4359 | * command, unless a socket error has been | |
4360 | * detected. | |
bbd973c2 | 4361 | */ |
bbd973c2 | 4362 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4363 | continue; |
4364 | } | |
d6e4fca4 | 4365 | |
840cb59c | 4366 | health_code_update(); |
44a5e5eb | 4367 | |
54d01ffb DG |
4368 | DBG("Sending response (size: %d, retcode: %s)", |
4369 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 4370 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 4371 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
4372 | if (ret < 0) { |
4373 | ERR("Failed to send data back to client"); | |
bbd973c2 | 4374 | } |
1d4b027a | 4375 | |
5eb91c98 | 4376 | /* End of transmission */ |
76d7553f MD |
4377 | ret = close(sock); |
4378 | if (ret) { | |
4379 | PERROR("close"); | |
4380 | } | |
4381 | sock = -1; | |
be040666 DG |
4382 | |
4383 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 4384 | |
840cb59c | 4385 | health_code_update(); |
273ea72c DG |
4386 | } |
4387 | ||
139ac872 | 4388 | exit: |
5eb91c98 | 4389 | error: |
35df2755 CB |
4390 | if (sock >= 0) { |
4391 | ret = close(sock); | |
4392 | if (ret) { | |
4393 | PERROR("close"); | |
4394 | } | |
139ac872 | 4395 | } |
44a5e5eb | 4396 | |
35df2755 CB |
4397 | lttng_poll_clean(&events); |
4398 | clean_command_ctx(&cmd_ctx); | |
4399 | ||
4400 | error_listen: | |
4401 | error_create_poll: | |
273ea72c | 4402 | unlink(client_unix_sock_path); |
76d7553f MD |
4403 | if (client_sock >= 0) { |
4404 | ret = close(client_sock); | |
4405 | if (ret) { | |
4406 | PERROR("close"); | |
4407 | } | |
a4b35e07 | 4408 | } |
35df2755 CB |
4409 | |
4410 | if (err) { | |
840cb59c | 4411 | health_error(); |
35df2755 | 4412 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4413 | } |
273ea72c | 4414 | |
8782cc74 | 4415 | health_unregister(health_sessiond); |
35df2755 CB |
4416 | |
4417 | DBG("Client thread dying"); | |
f6a9efaa DG |
4418 | |
4419 | rcu_unregister_thread(); | |
4a15001e MD |
4420 | |
4421 | /* | |
4422 | * Since we are creating the consumer threads, we own them, so we need | |
4423 | * to join them before our thread exits. | |
4424 | */ | |
4425 | ret = join_consumer_thread(&kconsumer_data); | |
4426 | if (ret) { | |
4427 | errno = ret; | |
4428 | PERROR("join_consumer"); | |
4429 | } | |
4430 | ||
4431 | ret = join_consumer_thread(&ustconsumer32_data); | |
4432 | if (ret) { | |
4433 | errno = ret; | |
4434 | PERROR("join_consumer ust32"); | |
4435 | } | |
4436 | ||
4437 | ret = join_consumer_thread(&ustconsumer64_data); | |
4438 | if (ret) { | |
4439 | errno = ret; | |
4440 | PERROR("join_consumer ust64"); | |
4441 | } | |
1d4b027a DG |
4442 | return NULL; |
4443 | } | |
4444 | ||
4445 | ||
fac6795d DG |
4446 | /* |
4447 | * usage function on stderr | |
4448 | */ | |
4449 | static void usage(void) | |
4450 | { | |
b716ce68 | 4451 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
4452 | fprintf(stderr, " -h, --help Display this usage.\n"); |
4453 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
4454 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
4455 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
4456 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
4457 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
4458 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
4459 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
4460 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
4461 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
4462 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
4463 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
4464 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 | 4465 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
72dd7491 | 4466 | fprintf(stderr, " -b, --background Start as a daemon, keeping console open.\n"); |
d6f42150 DG |
4467 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); |
4468 | fprintf(stderr, " -V, --version Show version number.\n"); | |
7fe6d2c5 | 4469 | fprintf(stderr, " -S, --sig-parent Send SIGUSR1 to parent pid to notify readiness.\n"); |
d6f42150 DG |
4470 | fprintf(stderr, " -q, --quiet No output at all.\n"); |
4471 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
35f90c40 | 4472 | fprintf(stderr, " -p, --pidfile FILE Write a pid to FILE name overriding the default value.\n"); |
3bd1e081 | 4473 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 4474 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
1b2ef7fe | 4475 | fprintf(stderr, " --agent-tcp-port Agent registration TCP port\n"); |
76d01ebb | 4476 | fprintf(stderr, " -f --config PATH Load daemon configuration file\n"); |
ef367a93 | 4477 | fprintf(stderr, " -l --load PATH Load session configuration\n"); |
fbb9748b | 4478 | fprintf(stderr, " --kmod-probes Specify kernel module probes to load\n"); |
c9d42407 | 4479 | fprintf(stderr, " --extra-kmod-probes Specify extra kernel module probes to load\n"); |
fac6795d DG |
4480 | } |
4481 | ||
0a17a3a0 JG |
4482 | static int string_match(const char *str1, const char *str2) |
4483 | { | |
4484 | return (str1 && str2) && !strcmp(str1, str2); | |
4485 | } | |
4486 | ||
fac6795d | 4487 | /* |
26296c48 JG |
4488 | * Take an option from the getopt output and set it in the right variable to be |
4489 | * used later. | |
4490 | * | |
4491 | * Return 0 on success else a negative value. | |
fac6795d | 4492 | */ |
26296c48 | 4493 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4494 | { |
26296c48 | 4495 | int ret = 0; |
fac6795d | 4496 | |
c5d350b2 JG |
4497 | if (arg && arg[0] == '\0') { |
4498 | /* | |
4499 | * This only happens if the value is read from daemon config | |
4500 | * file. This means the option requires an argument and the | |
4501 | * configuration file contains a line such as: | |
4502 | * my_option = | |
4503 | */ | |
4504 | ret = -EINVAL; | |
4505 | goto end; | |
4506 | } | |
4507 | ||
0a17a3a0 | 4508 | if (string_match(optname, "client-sock") || opt == 'c') { |
e8fa9fb0 MD |
4509 | if (lttng_is_setuid_setgid()) { |
4510 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4511 | "-c, --client-sock"); | |
4512 | } else { | |
4513 | snprintf(client_unix_sock_path, PATH_MAX, "%s", arg); | |
4514 | } | |
0a17a3a0 | 4515 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
e8fa9fb0 MD |
4516 | if (lttng_is_setuid_setgid()) { |
4517 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4518 | "-a, --apps-sock"); | |
4519 | } else { | |
4520 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", arg); | |
4521 | } | |
0a17a3a0 | 4522 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
26296c48 | 4523 | opt_daemon = 1; |
0a17a3a0 | 4524 | } else if (string_match(optname, "background") || opt == 'b') { |
72dd7491 | 4525 | opt_background = 1; |
0a17a3a0 | 4526 | } else if (string_match(optname, "group") || opt == 'g') { |
e8fa9fb0 MD |
4527 | if (lttng_is_setuid_setgid()) { |
4528 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4529 | "-g, --group"); | |
4530 | } else { | |
4531 | /* | |
4532 | * If the override option is set, the pointer points to a | |
4533 | * *non* const thus freeing it even though the variable type is | |
4534 | * set to const. | |
4535 | */ | |
4536 | if (tracing_group_name_override) { | |
4537 | free((void *) tracing_group_name); | |
4538 | } | |
4539 | tracing_group_name = strdup(arg); | |
4540 | if (!tracing_group_name) { | |
4541 | PERROR("strdup"); | |
4542 | ret = -ENOMEM; | |
4543 | } | |
4544 | tracing_group_name_override = 1; | |
db322c4d | 4545 | } |
0a17a3a0 | 4546 | } else if (string_match(optname, "help") || opt == 'h') { |
26296c48 | 4547 | usage(); |
4a15001e | 4548 | exit(EXIT_SUCCESS); |
0a17a3a0 | 4549 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
4550 | fprintf(stdout, "%s\n", VERSION); |
4551 | exit(EXIT_SUCCESS); | |
0a17a3a0 | 4552 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
26296c48 | 4553 | opt_sig_parent = 1; |
0a17a3a0 | 4554 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
e8fa9fb0 MD |
4555 | if (lttng_is_setuid_setgid()) { |
4556 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4557 | "--kconsumerd-err-sock"); | |
4558 | } else { | |
4559 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4560 | } | |
0a17a3a0 | 4561 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
e8fa9fb0 MD |
4562 | if (lttng_is_setuid_setgid()) { |
4563 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4564 | "--kconsumerd-cmd-sock"); | |
4565 | } else { | |
4566 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4567 | } | |
0a17a3a0 | 4568 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
e8fa9fb0 MD |
4569 | if (lttng_is_setuid_setgid()) { |
4570 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4571 | "--ustconsumerd64-err-sock"); | |
4572 | } else { | |
4573 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4574 | } | |
0a17a3a0 | 4575 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
e8fa9fb0 MD |
4576 | if (lttng_is_setuid_setgid()) { |
4577 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4578 | "--ustconsumerd64-cmd-sock"); | |
4579 | } else { | |
4580 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4581 | } | |
0a17a3a0 | 4582 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
e8fa9fb0 MD |
4583 | if (lttng_is_setuid_setgid()) { |
4584 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4585 | "--ustconsumerd32-err-sock"); | |
4586 | } else { | |
4587 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4588 | } | |
0a17a3a0 | 4589 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
e8fa9fb0 MD |
4590 | if (lttng_is_setuid_setgid()) { |
4591 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4592 | "--ustconsumerd32-cmd-sock"); | |
4593 | } else { | |
4594 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4595 | } | |
0a17a3a0 | 4596 | } else if (string_match(optname, "no-kernel")) { |
26296c48 | 4597 | opt_no_kernel = 1; |
0a17a3a0 | 4598 | } else if (string_match(optname, "quiet") || opt == 'q') { |
26296c48 | 4599 | lttng_opt_quiet = 1; |
0a17a3a0 | 4600 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
4601 | /* Verbose level can increase using multiple -v */ |
4602 | if (arg) { | |
13755a18 | 4603 | /* Value obtained from config file */ |
26296c48 JG |
4604 | lttng_opt_verbose = config_parse_value(arg); |
4605 | } else { | |
13755a18 JG |
4606 | /* -v used on command line */ |
4607 | lttng_opt_verbose++; | |
26296c48 | 4608 | } |
13755a18 JG |
4609 | /* Clamp value to [0, 3] */ |
4610 | lttng_opt_verbose = lttng_opt_verbose < 0 ? 0 : | |
4611 | (lttng_opt_verbose <= 3 ? lttng_opt_verbose : 3); | |
0a17a3a0 | 4612 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 JG |
4613 | if (arg) { |
4614 | opt_verbose_consumer = config_parse_value(arg); | |
4615 | } else { | |
3bd1e081 | 4616 | opt_verbose_consumer += 1; |
26296c48 | 4617 | } |
0a17a3a0 | 4618 | } else if (string_match(optname, "consumerd32-path")) { |
e8fa9fb0 MD |
4619 | if (lttng_is_setuid_setgid()) { |
4620 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4621 | "--consumerd32-path"); | |
4622 | } else { | |
4623 | if (consumerd32_bin_override) { | |
4624 | free((void *) consumerd32_bin); | |
4625 | } | |
4626 | consumerd32_bin = strdup(arg); | |
4627 | if (!consumerd32_bin) { | |
4628 | PERROR("strdup"); | |
4629 | ret = -ENOMEM; | |
4630 | } | |
4631 | consumerd32_bin_override = 1; | |
db322c4d | 4632 | } |
0a17a3a0 | 4633 | } else if (string_match(optname, "consumerd32-libdir")) { |
e8fa9fb0 MD |
4634 | if (lttng_is_setuid_setgid()) { |
4635 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4636 | "--consumerd32-libdir"); | |
4637 | } else { | |
4638 | if (consumerd32_libdir_override) { | |
4639 | free((void *) consumerd32_libdir); | |
4640 | } | |
4641 | consumerd32_libdir = strdup(arg); | |
4642 | if (!consumerd32_libdir) { | |
4643 | PERROR("strdup"); | |
4644 | ret = -ENOMEM; | |
4645 | } | |
4646 | consumerd32_libdir_override = 1; | |
db322c4d | 4647 | } |
0a17a3a0 | 4648 | } else if (string_match(optname, "consumerd64-path")) { |
e8fa9fb0 MD |
4649 | if (lttng_is_setuid_setgid()) { |
4650 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4651 | "--consumerd64-path"); | |
4652 | } else { | |
4653 | if (consumerd64_bin_override) { | |
4654 | free((void *) consumerd64_bin); | |
4655 | } | |
4656 | consumerd64_bin = strdup(arg); | |
4657 | if (!consumerd64_bin) { | |
4658 | PERROR("strdup"); | |
4659 | ret = -ENOMEM; | |
4660 | } | |
4661 | consumerd64_bin_override = 1; | |
db322c4d | 4662 | } |
0a17a3a0 | 4663 | } else if (string_match(optname, "consumerd64-libdir")) { |
e8fa9fb0 MD |
4664 | if (lttng_is_setuid_setgid()) { |
4665 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4666 | "--consumerd64-libdir"); | |
4667 | } else { | |
4668 | if (consumerd64_libdir_override) { | |
4669 | free((void *) consumerd64_libdir); | |
4670 | } | |
4671 | consumerd64_libdir = strdup(arg); | |
4672 | if (!consumerd64_libdir) { | |
4673 | PERROR("strdup"); | |
4674 | ret = -ENOMEM; | |
4675 | } | |
4676 | consumerd64_libdir_override = 1; | |
db322c4d | 4677 | } |
0a17a3a0 | 4678 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
e8fa9fb0 MD |
4679 | if (lttng_is_setuid_setgid()) { |
4680 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4681 | "-p, --pidfile"); | |
4682 | } else { | |
4683 | free(opt_pidfile); | |
4684 | opt_pidfile = strdup(arg); | |
4685 | if (!opt_pidfile) { | |
4686 | PERROR("strdup"); | |
4687 | ret = -ENOMEM; | |
4688 | } | |
db322c4d | 4689 | } |
0a17a3a0 | 4690 | } else if (string_match(optname, "agent-tcp-port")) { |
e8fa9fb0 MD |
4691 | if (lttng_is_setuid_setgid()) { |
4692 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4693 | "--agent-tcp-port"); | |
4694 | } else { | |
4695 | unsigned long v; | |
4d076222 | 4696 | |
e04aa23e JG |
4697 | if (!arg) { |
4698 | ret = -EINVAL; | |
4699 | goto end; | |
4700 | } | |
e8fa9fb0 MD |
4701 | errno = 0; |
4702 | v = strtoul(arg, NULL, 0); | |
4703 | if (errno != 0 || !isdigit(arg[0])) { | |
4704 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
4705 | return -1; | |
4706 | } | |
4707 | if (v == 0 || v >= 65535) { | |
4708 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
4709 | return -1; | |
4710 | } | |
4711 | agent_tcp_port = (uint32_t) v; | |
4712 | DBG3("Agent TCP port set to non default: %u", agent_tcp_port); | |
26296c48 | 4713 | } |
0a17a3a0 | 4714 | } else if (string_match(optname, "load") || opt == 'l') { |
e8fa9fb0 MD |
4715 | if (lttng_is_setuid_setgid()) { |
4716 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4717 | "-l, --load"); | |
4718 | } else { | |
4719 | free(opt_load_session_path); | |
4720 | opt_load_session_path = strdup(arg); | |
4721 | if (!opt_load_session_path) { | |
4722 | PERROR("strdup"); | |
4723 | ret = -ENOMEM; | |
4724 | } | |
ef367a93 | 4725 | } |
0a17a3a0 | 4726 | } else if (string_match(optname, "kmod-probes")) { |
e8fa9fb0 MD |
4727 | if (lttng_is_setuid_setgid()) { |
4728 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4729 | "--kmod-probes"); | |
4730 | } else { | |
4731 | free(kmod_probes_list); | |
4732 | kmod_probes_list = strdup(arg); | |
4733 | if (!kmod_probes_list) { | |
4734 | PERROR("strdup"); | |
4735 | ret = -ENOMEM; | |
4736 | } | |
c9d42407 | 4737 | } |
0a17a3a0 | 4738 | } else if (string_match(optname, "extra-kmod-probes")) { |
e8fa9fb0 MD |
4739 | if (lttng_is_setuid_setgid()) { |
4740 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4741 | "--extra-kmod-probes"); | |
4742 | } else { | |
4743 | free(kmod_extra_probes_list); | |
4744 | kmod_extra_probes_list = strdup(arg); | |
4745 | if (!kmod_extra_probes_list) { | |
4746 | PERROR("strdup"); | |
4747 | ret = -ENOMEM; | |
4748 | } | |
db322c4d | 4749 | } |
0a17a3a0 JG |
4750 | } else if (string_match(optname, "config") || opt == 'f') { |
4751 | /* This is handled in set_options() thus silent skip. */ | |
4752 | goto end; | |
4753 | } else { | |
26296c48 JG |
4754 | /* Unknown option or other error. |
4755 | * Error is printed by getopt, just return */ | |
4756 | ret = -1; | |
4757 | } | |
4758 | ||
f3dd7ce7 | 4759 | end: |
c5d350b2 JG |
4760 | if (ret == -EINVAL) { |
4761 | const char *opt_name = "unknown"; | |
4762 | int i; | |
4763 | ||
4764 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
4765 | i++) { | |
4766 | if (opt == long_options[i].val) { | |
4767 | opt_name = long_options[i].name; | |
4768 | break; | |
4769 | } | |
4770 | } | |
4771 | ||
4772 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
4773 | opt_name); | |
4774 | } | |
f3dd7ce7 | 4775 | |
26296c48 JG |
4776 | return ret; |
4777 | } | |
4778 | ||
4779 | /* | |
4780 | * config_entry_handler_cb used to handle options read from a config file. | |
4781 | * See config_entry_handler_cb comment in common/config/config.h for the | |
4782 | * return value conventions. | |
4783 | */ | |
4784 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
4785 | { | |
4786 | int ret = 0, i; | |
4787 | ||
4788 | if (!entry || !entry->name || !entry->value) { | |
4789 | ret = -EINVAL; | |
4790 | goto end; | |
4791 | } | |
4792 | ||
4793 | /* Check if the option is to be ignored */ | |
4794 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
4795 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
4796 | goto end; | |
4797 | } | |
4798 | } | |
4799 | ||
4800 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
4801 | i++) { | |
4802 | ||
4803 | /* Ignore if not fully matched. */ | |
4804 | if (strcmp(entry->name, long_options[i].name)) { | |
4805 | continue; | |
4806 | } | |
4807 | ||
4808 | /* | |
4809 | * If the option takes no argument on the command line, we have to | |
4810 | * check if the value is "true". We support non-zero numeric values, | |
4811 | * true, on and yes. | |
4812 | */ | |
4813 | if (!long_options[i].has_arg) { | |
4814 | ret = config_parse_value(entry->value); | |
4815 | if (ret <= 0) { | |
4816 | if (ret) { | |
4817 | WARN("Invalid configuration value \"%s\" for option %s", | |
4818 | entry->value, entry->name); | |
4819 | } | |
4820 | /* False, skip boolean config option. */ | |
4821 | goto end; | |
4d076222 | 4822 | } |
26296c48 JG |
4823 | } |
4824 | ||
4825 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
4826 | goto end; | |
4827 | } | |
4828 | ||
4829 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
4830 | ||
4831 | end: | |
4832 | return ret; | |
4833 | } | |
4834 | ||
4835 | /* | |
4836 | * daemon configuration loading and argument parsing | |
4837 | */ | |
4838 | static int set_options(int argc, char **argv) | |
4839 | { | |
4840 | int ret = 0, c = 0, option_index = 0; | |
4841 | int orig_optopt = optopt, orig_optind = optind; | |
4842 | char *optstring; | |
4843 | const char *config_path = NULL; | |
4844 | ||
4845 | optstring = utils_generate_optstring(long_options, | |
4846 | sizeof(long_options) / sizeof(struct option)); | |
4847 | if (!optstring) { | |
4848 | ret = -ENOMEM; | |
4849 | goto end; | |
4850 | } | |
4851 | ||
4852 | /* Check for the --config option */ | |
4853 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
4854 | &option_index)) != -1) { | |
4855 | if (c == '?') { | |
4856 | ret = -EINVAL; | |
4857 | goto end; | |
4858 | } else if (c != 'f') { | |
4859 | /* if not equal to --config option. */ | |
4860 | continue; | |
4861 | } | |
4862 | ||
e8fa9fb0 MD |
4863 | if (lttng_is_setuid_setgid()) { |
4864 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4865 | "-f, --config"); | |
4866 | } else { | |
4867 | config_path = utils_expand_path(optarg); | |
4868 | if (!config_path) { | |
4869 | ERR("Failed to resolve path: %s", optarg); | |
4870 | } | |
26296c48 JG |
4871 | } |
4872 | } | |
4873 | ||
4874 | ret = config_get_section_entries(config_path, config_section_name, | |
4875 | config_entry_handler, NULL); | |
4876 | if (ret) { | |
4877 | if (ret > 0) { | |
4878 | ERR("Invalid configuration option at line %i", ret); | |
4879 | ret = -1; | |
4880 | } | |
4881 | goto end; | |
4882 | } | |
4883 | ||
4884 | /* Reset getopt's global state */ | |
4885 | optopt = orig_optopt; | |
4886 | optind = orig_optind; | |
4887 | while (1) { | |
0a17a3a0 JG |
4888 | option_index = -1; |
4889 | /* | |
4890 | * getopt_long() will not set option_index if it encounters a | |
4891 | * short option. | |
4892 | */ | |
4893 | c = getopt_long(argc, argv, optstring, long_options, | |
4894 | &option_index); | |
26296c48 | 4895 | if (c == -1) { |
4d076222 DG |
4896 | break; |
4897 | } | |
26296c48 | 4898 | |
0a17a3a0 JG |
4899 | /* |
4900 | * Pass NULL as the long option name if popt left the index | |
4901 | * unset. | |
4902 | */ | |
4903 | ret = set_option(c, optarg, | |
4904 | option_index < 0 ? NULL : | |
4905 | long_options[option_index].name); | |
26296c48 JG |
4906 | if (ret < 0) { |
4907 | break; | |
fac6795d DG |
4908 | } |
4909 | } | |
4910 | ||
26296c48 JG |
4911 | end: |
4912 | free(optstring); | |
4913 | return ret; | |
fac6795d DG |
4914 | } |
4915 | ||
4916 | /* | |
d063d709 | 4917 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
4918 | * apps_sock - The communication socket for all UST apps. |
4919 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 4920 | */ |
cf3af59e | 4921 | static int init_daemon_socket(void) |
fac6795d DG |
4922 | { |
4923 | int ret = 0; | |
4924 | mode_t old_umask; | |
4925 | ||
4926 | old_umask = umask(0); | |
4927 | ||
4928 | /* Create client tool unix socket */ | |
d6f42150 DG |
4929 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
4930 | if (client_sock < 0) { | |
4931 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
4932 | ret = -1; |
4933 | goto end; | |
4934 | } | |
4935 | ||
b662582b DG |
4936 | /* Set the cloexec flag */ |
4937 | ret = utils_set_fd_cloexec(client_sock); | |
4938 | if (ret < 0) { | |
4939 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
4940 | "Continuing but note that the consumer daemon will have a " | |
4941 | "reference to this socket on exec()", client_sock); | |
4942 | } | |
4943 | ||
fac6795d DG |
4944 | /* File permission MUST be 660 */ |
4945 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4946 | if (ret < 0) { | |
d6f42150 | 4947 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 4948 | PERROR("chmod"); |
fac6795d DG |
4949 | goto end; |
4950 | } | |
4951 | ||
4952 | /* Create the application unix socket */ | |
d6f42150 DG |
4953 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
4954 | if (apps_sock < 0) { | |
4955 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
4956 | ret = -1; |
4957 | goto end; | |
4958 | } | |
4959 | ||
b662582b DG |
4960 | /* Set the cloexec flag */ |
4961 | ret = utils_set_fd_cloexec(apps_sock); | |
4962 | if (ret < 0) { | |
4963 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
4964 | "Continuing but note that the consumer daemon will have a " | |
4965 | "reference to this socket on exec()", apps_sock); | |
4966 | } | |
4967 | ||
d6f42150 | 4968 | /* File permission MUST be 666 */ |
54d01ffb DG |
4969 | ret = chmod(apps_unix_sock_path, |
4970 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 4971 | if (ret < 0) { |
d6f42150 | 4972 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 4973 | PERROR("chmod"); |
fac6795d DG |
4974 | goto end; |
4975 | } | |
4976 | ||
b662582b DG |
4977 | DBG3("Session daemon client socket %d and application socket %d created", |
4978 | client_sock, apps_sock); | |
4979 | ||
fac6795d DG |
4980 | end: |
4981 | umask(old_umask); | |
4982 | return ret; | |
4983 | } | |
4984 | ||
4985 | /* | |
54d01ffb DG |
4986 | * Check if the global socket is available, and if a daemon is answering at the |
4987 | * other side. If yes, error is returned. | |
fac6795d | 4988 | */ |
cf3af59e | 4989 | static int check_existing_daemon(void) |
fac6795d | 4990 | { |
7d8234d9 | 4991 | /* Is there anybody out there ? */ |
099e26bd | 4992 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 4993 | return -EEXIST; |
099e26bd | 4994 | } |
b09c7c76 DG |
4995 | |
4996 | return 0; | |
fac6795d DG |
4997 | } |
4998 | ||
fac6795d | 4999 | /* |
d063d709 | 5000 | * Set the tracing group gid onto the client socket. |
5e16da05 | 5001 | * |
d063d709 | 5002 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 5003 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 5004 | */ |
be040666 | 5005 | static int set_permissions(char *rundir) |
fac6795d DG |
5006 | { |
5007 | int ret; | |
996b65c8 | 5008 | gid_t gid; |
fac6795d | 5009 | |
6c71277b | 5010 | gid = utils_get_group_id(tracing_group_name); |
fac6795d | 5011 | |
d6f42150 | 5012 | /* Set lttng run dir */ |
be040666 | 5013 | ret = chown(rundir, 0, gid); |
d6f42150 | 5014 | if (ret < 0) { |
be040666 | 5015 | ERR("Unable to set group on %s", rundir); |
76d7553f | 5016 | PERROR("chown"); |
d6f42150 DG |
5017 | } |
5018 | ||
6c71277b MD |
5019 | /* |
5020 | * Ensure all applications and tracing group can search the run | |
5021 | * dir. Allow everyone to read the directory, since it does not | |
5022 | * buy us anything to hide its content. | |
5023 | */ | |
5024 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
5025 | if (ret < 0) { |
5026 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 5027 | PERROR("chmod"); |
d1613cf5 JN |
5028 | } |
5029 | ||
d6f42150 | 5030 | /* lttng client socket path */ |
996b65c8 | 5031 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 5032 | if (ret < 0) { |
d6f42150 | 5033 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 5034 | PERROR("chown"); |
d6f42150 DG |
5035 | } |
5036 | ||
3bd1e081 | 5037 | /* kconsumer error socket path */ |
6c71277b | 5038 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 5039 | if (ret < 0) { |
3bd1e081 | 5040 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 5041 | PERROR("chown"); |
3bd1e081 MD |
5042 | } |
5043 | ||
7753dea8 | 5044 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 5045 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
5046 | if (ret < 0) { |
5047 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 5048 | PERROR("chown"); |
7753dea8 MD |
5049 | } |
5050 | ||
5051 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 5052 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 5053 | if (ret < 0) { |
7753dea8 | 5054 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 5055 | PERROR("chown"); |
fac6795d DG |
5056 | } |
5057 | ||
d6f42150 | 5058 | DBG("All permissions are set"); |
e07ae692 | 5059 | |
fac6795d DG |
5060 | return ret; |
5061 | } | |
5062 | ||
d6f42150 | 5063 | /* |
d063d709 | 5064 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 5065 | */ |
67e40797 | 5066 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
5067 | { |
5068 | int ret; | |
5069 | ||
67e40797 DG |
5070 | DBG3("Creating LTTng run directory: %s", rundir); |
5071 | ||
d1613cf5 | 5072 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 5073 | if (ret < 0) { |
b1f11e69 | 5074 | if (errno != EEXIST) { |
67e40797 | 5075 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
5076 | goto error; |
5077 | } else { | |
5078 | ret = 0; | |
5079 | } | |
d6f42150 DG |
5080 | } |
5081 | ||
5082 | error: | |
5083 | return ret; | |
5084 | } | |
5085 | ||
5086 | /* | |
d063d709 DG |
5087 | * Setup sockets and directory needed by the kconsumerd communication with the |
5088 | * session daemon. | |
d6f42150 | 5089 | */ |
67e40797 DG |
5090 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
5091 | const char *rundir) | |
d6f42150 DG |
5092 | { |
5093 | int ret; | |
67e40797 | 5094 | char path[PATH_MAX]; |
d6f42150 | 5095 | |
6c71277b | 5096 | switch (consumer_data->type) { |
7753dea8 | 5097 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 5098 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
5099 | break; |
5100 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 5101 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
5102 | break; |
5103 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 5104 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
5105 | break; |
5106 | default: | |
5107 | ERR("Consumer type unknown"); | |
5108 | ret = -EINVAL; | |
5109 | goto error; | |
d6f42150 DG |
5110 | } |
5111 | ||
67e40797 DG |
5112 | DBG2("Creating consumer directory: %s", path); |
5113 | ||
6c71277b | 5114 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
d6f42150 | 5115 | if (ret < 0) { |
6beb2242 | 5116 | if (errno != EEXIST) { |
f11e84c2 | 5117 | PERROR("mkdir"); |
3bd1e081 | 5118 | ERR("Failed to create %s", path); |
6beb2242 DG |
5119 | goto error; |
5120 | } | |
f11e84c2 | 5121 | ret = -1; |
d6f42150 | 5122 | } |
6c71277b MD |
5123 | if (is_root) { |
5124 | ret = chown(path, 0, utils_get_group_id(tracing_group_name)); | |
5125 | if (ret < 0) { | |
5126 | ERR("Unable to set group on %s", path); | |
5127 | PERROR("chown"); | |
5128 | goto error; | |
5129 | } | |
5130 | } | |
d6f42150 DG |
5131 | |
5132 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
5133 | consumer_data->err_sock = |
5134 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
5135 | if (consumer_data->err_sock < 0) { | |
5136 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
5137 | ret = -1; |
5138 | goto error; | |
5139 | } | |
5140 | ||
a24f05ab MD |
5141 | /* |
5142 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
5143 | * show must go on. | |
5144 | */ | |
5145 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
5146 | if (ret < 0) { | |
5147 | PERROR("utils_set_fd_cloexec"); | |
5148 | /* continue anyway */ | |
5149 | } | |
5150 | ||
d6f42150 | 5151 | /* File permission MUST be 660 */ |
3bd1e081 | 5152 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 5153 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 5154 | if (ret < 0) { |
3bd1e081 | 5155 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 5156 | PERROR("chmod"); |
d6f42150 DG |
5157 | goto error; |
5158 | } | |
5159 | ||
5160 | error: | |
5161 | return ret; | |
5162 | } | |
5163 | ||
fac6795d | 5164 | /* |
d063d709 | 5165 | * Signal handler for the daemon |
cf3af59e | 5166 | * |
54d01ffb DG |
5167 | * Simply stop all worker threads, leaving main() return gracefully after |
5168 | * joining all threads and calling cleanup(). | |
fac6795d DG |
5169 | */ |
5170 | static void sighandler(int sig) | |
5171 | { | |
5172 | switch (sig) { | |
cf3af59e | 5173 | case SIGPIPE: |
af87c45a | 5174 | DBG("SIGPIPE caught"); |
cf3af59e MD |
5175 | return; |
5176 | case SIGINT: | |
af87c45a | 5177 | DBG("SIGINT caught"); |
cf3af59e MD |
5178 | stop_threads(); |
5179 | break; | |
5180 | case SIGTERM: | |
af87c45a | 5181 | DBG("SIGTERM caught"); |
cf3af59e MD |
5182 | stop_threads(); |
5183 | break; | |
0bb7724a DG |
5184 | case SIGUSR1: |
5185 | CMM_STORE_SHARED(recv_child_signal, 1); | |
5186 | break; | |
cf3af59e MD |
5187 | default: |
5188 | break; | |
fac6795d | 5189 | } |
fac6795d DG |
5190 | } |
5191 | ||
5192 | /* | |
d063d709 | 5193 | * Setup signal handler for : |
1d4b027a | 5194 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 5195 | */ |
1d4b027a | 5196 | static int set_signal_handler(void) |
fac6795d | 5197 | { |
1d4b027a DG |
5198 | int ret = 0; |
5199 | struct sigaction sa; | |
5200 | sigset_t sigset; | |
fac6795d | 5201 | |
1d4b027a | 5202 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 5203 | PERROR("sigemptyset"); |
1d4b027a DG |
5204 | return ret; |
5205 | } | |
d6f42150 | 5206 | |
1d4b027a DG |
5207 | sa.sa_handler = sighandler; |
5208 | sa.sa_mask = sigset; | |
5209 | sa.sa_flags = 0; | |
5210 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 5211 | PERROR("sigaction"); |
1d4b027a | 5212 | return ret; |
d6f42150 DG |
5213 | } |
5214 | ||
1d4b027a | 5215 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 5216 | PERROR("sigaction"); |
1d4b027a | 5217 | return ret; |
d6f42150 | 5218 | } |
aaf26714 | 5219 | |
1d4b027a | 5220 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 5221 | PERROR("sigaction"); |
1d4b027a | 5222 | return ret; |
8c0faa1d DG |
5223 | } |
5224 | ||
0bb7724a DG |
5225 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
5226 | PERROR("sigaction"); | |
5227 | return ret; | |
5228 | } | |
5229 | ||
5230 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
5231 | |
5232 | return ret; | |
fac6795d DG |
5233 | } |
5234 | ||
f3ed775e | 5235 | /* |
d063d709 DG |
5236 | * Set open files limit to unlimited. This daemon can open a large number of |
5237 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
5238 | */ |
5239 | static void set_ulimit(void) | |
5240 | { | |
5241 | int ret; | |
5242 | struct rlimit lim; | |
5243 | ||
a88df331 | 5244 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
5245 | lim.rlim_cur = 65535; |
5246 | lim.rlim_max = 65535; | |
5247 | ||
5248 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
5249 | if (ret < 0) { | |
76d7553f | 5250 | PERROR("failed to set open files limit"); |
f3ed775e DG |
5251 | } |
5252 | } | |
5253 | ||
35f90c40 DG |
5254 | /* |
5255 | * Write pidfile using the rundir and opt_pidfile. | |
5256 | */ | |
4a15001e | 5257 | static int write_pidfile(void) |
35f90c40 DG |
5258 | { |
5259 | int ret; | |
5260 | char pidfile_path[PATH_MAX]; | |
5261 | ||
5262 | assert(rundir); | |
5263 | ||
5264 | if (opt_pidfile) { | |
5265 | strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path)); | |
5266 | } else { | |
5267 | /* Build pidfile path from rundir and opt_pidfile. */ | |
5268 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
5269 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
5270 | if (ret < 0) { | |
5271 | PERROR("snprintf pidfile path"); | |
5272 | goto error; | |
5273 | } | |
5274 | } | |
5275 | ||
5276 | /* | |
4a15001e | 5277 | * Create pid file in rundir. |
35f90c40 | 5278 | */ |
4a15001e | 5279 | ret = utils_create_pid_file(getpid(), pidfile_path); |
35f90c40 | 5280 | error: |
4a15001e | 5281 | return ret; |
35f90c40 DG |
5282 | } |
5283 | ||
c9cb3e7d JG |
5284 | /* |
5285 | * Create lockfile using the rundir and return its fd. | |
5286 | */ | |
5287 | static int create_lockfile(void) | |
5288 | { | |
5289 | int ret; | |
5290 | char lockfile_path[PATH_MAX]; | |
5291 | ||
5292 | ret = generate_lock_file_path(lockfile_path, sizeof(lockfile_path)); | |
5293 | if (ret < 0) { | |
5294 | goto error; | |
5295 | } | |
5296 | ||
5297 | ret = utils_create_lock_file(lockfile_path); | |
5298 | error: | |
5299 | return ret; | |
5300 | } | |
5301 | ||
cd9290dd | 5302 | /* |
022d91ba | 5303 | * Write agent TCP port using the rundir. |
cd9290dd | 5304 | */ |
4a15001e | 5305 | static int write_agent_port(void) |
cd9290dd DG |
5306 | { |
5307 | int ret; | |
5308 | char path[PATH_MAX]; | |
5309 | ||
5310 | assert(rundir); | |
5311 | ||
5312 | ret = snprintf(path, sizeof(path), "%s/" | |
022d91ba | 5313 | DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE, rundir); |
cd9290dd | 5314 | if (ret < 0) { |
022d91ba | 5315 | PERROR("snprintf agent port path"); |
cd9290dd DG |
5316 | goto error; |
5317 | } | |
5318 | ||
5319 | /* | |
4a15001e | 5320 | * Create TCP agent port file in rundir. |
cd9290dd | 5321 | */ |
4a15001e | 5322 | ret = utils_create_pid_file(agent_tcp_port, path); |
cd9290dd DG |
5323 | |
5324 | error: | |
4a15001e | 5325 | return ret; |
ef367a93 JG |
5326 | } |
5327 | ||
fac6795d DG |
5328 | /* |
5329 | * main | |
5330 | */ | |
5331 | int main(int argc, char **argv) | |
5332 | { | |
4a15001e | 5333 | int ret = 0, retval = 0; |
fac6795d | 5334 | void *status; |
ae9e45b3 | 5335 | const char *home_path, *env_app_timeout; |
fac6795d | 5336 | |
77cdfc81 JG |
5337 | /* Initialize agent apps ht global variable */ |
5338 | agent_apps_ht_by_sock = NULL; | |
5339 | ||
335a95b7 MD |
5340 | init_kernel_workarounds(); |
5341 | ||
f6a9efaa DG |
5342 | rcu_register_thread(); |
5343 | ||
4a15001e MD |
5344 | if (set_signal_handler()) { |
5345 | retval = -1; | |
5346 | goto exit_set_signal_handler; | |
0bb7724a DG |
5347 | } |
5348 | ||
7753dea8 | 5349 | setup_consumerd_path(); |
fb09408a | 5350 | |
12744796 DG |
5351 | page_size = sysconf(_SC_PAGESIZE); |
5352 | if (page_size < 0) { | |
5353 | PERROR("sysconf _SC_PAGESIZE"); | |
5354 | page_size = LONG_MAX; | |
5355 | WARN("Fallback page size to %ld", page_size); | |
5356 | } | |
5357 | ||
4a15001e MD |
5358 | /* |
5359 | * Parse arguments and load the daemon configuration file. | |
5360 | * | |
5361 | * We have an exit_options exit path to free memory reserved by | |
5362 | * set_options. This is needed because the rest of sessiond_cleanup() | |
5363 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
5364 | * depends on set_options. | |
5365 | */ | |
fac6795d | 5366 | progname = argv[0]; |
4a15001e MD |
5367 | if (set_options(argc, argv)) { |
5368 | retval = -1; | |
5369 | goto exit_options; | |
fac6795d DG |
5370 | } |
5371 | ||
5372 | /* Daemonize */ | |
72dd7491 | 5373 | if (opt_daemon || opt_background) { |
ceed52b5 MD |
5374 | int i; |
5375 | ||
72dd7491 MD |
5376 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
5377 | !opt_background); | |
53094c05 | 5378 | if (ret < 0) { |
4a15001e MD |
5379 | retval = -1; |
5380 | goto exit_options; | |
53094c05 | 5381 | } |
0bb7724a | 5382 | |
ceed52b5 | 5383 | /* |
0bb7724a | 5384 | * We are in the child. Make sure all other file descriptors are |
4a15001e MD |
5385 | * closed, in case we are called with more opened file |
5386 | * descriptors than the standard ones. | |
ceed52b5 MD |
5387 | */ |
5388 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
5389 | (void) close(i); | |
5390 | } | |
5391 | } | |
5392 | ||
4a15001e MD |
5393 | /* |
5394 | * Starting from here, we can create threads. This needs to be after | |
5395 | * lttng_daemonize due to RCU. | |
5396 | */ | |
5397 | ||
5398 | /* | |
5399 | * Initialize the health check subsystem. This call should set the | |
5400 | * appropriate time values. | |
5401 | */ | |
5402 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
5403 | if (!health_sessiond) { | |
5404 | PERROR("health_app_create error"); | |
5405 | retval = -1; | |
5406 | goto exit_health_sessiond_cleanup; | |
5407 | } | |
5408 | ||
5409 | if (init_ht_cleanup_quit_pipe()) { | |
5410 | retval = -1; | |
5411 | goto exit_ht_cleanup_quit_pipe; | |
5412 | } | |
5413 | ||
5414 | /* Setup the thread ht_cleanup communication pipe. */ | |
5415 | if (utils_create_pipe_cloexec(ht_cleanup_pipe)) { | |
5416 | retval = -1; | |
5417 | goto exit_ht_cleanup_pipe; | |
5418 | } | |
5419 | ||
25b397f9 MD |
5420 | /* Set up max poll set size */ |
5421 | if (lttng_poll_set_max_size()) { | |
5422 | retval = -1; | |
5423 | goto exit_set_max_size; | |
5424 | } | |
5425 | ||
4a15001e MD |
5426 | /* Create thread to clean up RCU hash tables */ |
5427 | ret = pthread_create(&ht_cleanup_thread, NULL, | |
5428 | thread_ht_cleanup, (void *) NULL); | |
5429 | if (ret) { | |
5430 | errno = ret; | |
5431 | PERROR("pthread_create ht_cleanup"); | |
5432 | retval = -1; | |
5433 | goto exit_ht_cleanup; | |
5434 | } | |
5435 | ||
ceed52b5 | 5436 | /* Create thread quit pipe */ |
4a15001e MD |
5437 | if (init_thread_quit_pipe()) { |
5438 | retval = -1; | |
5439 | goto exit_init_data; | |
fac6795d DG |
5440 | } |
5441 | ||
5442 | /* Check if daemon is UID = 0 */ | |
5443 | is_root = !getuid(); | |
5444 | ||
fac6795d | 5445 | if (is_root) { |
990570ed | 5446 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
4ea184d1 | 5447 | if (!rundir) { |
4a15001e MD |
5448 | retval = -1; |
5449 | goto exit_init_data; | |
4ea184d1 | 5450 | } |
67e40797 DG |
5451 | |
5452 | /* Create global run dir with root access */ | |
4a15001e MD |
5453 | if (create_lttng_rundir(rundir)) { |
5454 | retval = -1; | |
5455 | goto exit_init_data; | |
d6f42150 DG |
5456 | } |
5457 | ||
fac6795d | 5458 | if (strlen(apps_unix_sock_path) == 0) { |
4a15001e | 5459 | ret = snprintf(apps_unix_sock_path, PATH_MAX, |
d6f42150 | 5460 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); |
4a15001e MD |
5461 | if (ret < 0) { |
5462 | retval = -1; | |
5463 | goto exit_init_data; | |
5464 | } | |
fac6795d DG |
5465 | } |
5466 | ||
5467 | if (strlen(client_unix_sock_path) == 0) { | |
4a15001e | 5468 | ret = snprintf(client_unix_sock_path, PATH_MAX, |
d6f42150 | 5469 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); |
4a15001e MD |
5470 | if (ret < 0) { |
5471 | retval = -1; | |
5472 | goto exit_init_data; | |
5473 | } | |
d6f42150 | 5474 | } |
0fdd1e2c DG |
5475 | |
5476 | /* Set global SHM for ust */ | |
5477 | if (strlen(wait_shm_path) == 0) { | |
4a15001e | 5478 | ret = snprintf(wait_shm_path, PATH_MAX, |
0fdd1e2c | 5479 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); |
4a15001e MD |
5480 | if (ret < 0) { |
5481 | retval = -1; | |
5482 | goto exit_init_data; | |
5483 | } | |
0fdd1e2c | 5484 | } |
67e40797 | 5485 | |
44a5e5eb | 5486 | if (strlen(health_unix_sock_path) == 0) { |
4a15001e MD |
5487 | ret = snprintf(health_unix_sock_path, |
5488 | sizeof(health_unix_sock_path), | |
44a5e5eb | 5489 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); |
4a15001e MD |
5490 | if (ret < 0) { |
5491 | retval = -1; | |
5492 | goto exit_init_data; | |
5493 | } | |
44a5e5eb DG |
5494 | } |
5495 | ||
67e40797 | 5496 | /* Setup kernel consumerd path */ |
4a15001e | 5497 | ret = snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5498 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5499 | if (ret < 0) { |
5500 | retval = -1; | |
5501 | goto exit_init_data; | |
5502 | } | |
5503 | ret = snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5504 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5505 | if (ret < 0) { |
5506 | retval = -1; | |
5507 | goto exit_init_data; | |
5508 | } | |
67e40797 DG |
5509 | |
5510 | DBG2("Kernel consumer err path: %s", | |
5511 | kconsumer_data.err_unix_sock_path); | |
5512 | DBG2("Kernel consumer cmd path: %s", | |
5513 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 5514 | } else { |
feb0f3e5 | 5515 | home_path = utils_get_home_dir(); |
b082db07 | 5516 | if (home_path == NULL) { |
273ea72c DG |
5517 | /* TODO: Add --socket PATH option */ |
5518 | ERR("Can't get HOME directory for sockets creation."); | |
4a15001e MD |
5519 | retval = -1; |
5520 | goto exit_init_data; | |
b082db07 DG |
5521 | } |
5522 | ||
67e40797 DG |
5523 | /* |
5524 | * Create rundir from home path. This will create something like | |
5525 | * $HOME/.lttng | |
5526 | */ | |
990570ed | 5527 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 | 5528 | if (ret < 0) { |
4a15001e MD |
5529 | retval = -1; |
5530 | goto exit_init_data; | |
67e40797 DG |
5531 | } |
5532 | ||
4a15001e MD |
5533 | if (create_lttng_rundir(rundir)) { |
5534 | retval = -1; | |
5535 | goto exit_init_data; | |
67e40797 DG |
5536 | } |
5537 | ||
fac6795d | 5538 | if (strlen(apps_unix_sock_path) == 0) { |
4a15001e MD |
5539 | ret = snprintf(apps_unix_sock_path, PATH_MAX, |
5540 | DEFAULT_HOME_APPS_UNIX_SOCK, | |
5541 | home_path); | |
5542 | if (ret < 0) { | |
5543 | retval = -1; | |
5544 | goto exit_init_data; | |
5545 | } | |
fac6795d DG |
5546 | } |
5547 | ||
5548 | /* Set the cli tool unix socket path */ | |
5549 | if (strlen(client_unix_sock_path) == 0) { | |
4a15001e MD |
5550 | ret = snprintf(client_unix_sock_path, PATH_MAX, |
5551 | DEFAULT_HOME_CLIENT_UNIX_SOCK, | |
5552 | home_path); | |
5553 | if (ret < 0) { | |
5554 | retval = -1; | |
5555 | goto exit_init_data; | |
5556 | } | |
fac6795d | 5557 | } |
0fdd1e2c DG |
5558 | |
5559 | /* Set global SHM for ust */ | |
5560 | if (strlen(wait_shm_path) == 0) { | |
4a15001e MD |
5561 | ret = snprintf(wait_shm_path, PATH_MAX, |
5562 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, | |
5563 | getuid()); | |
5564 | if (ret < 0) { | |
5565 | retval = -1; | |
5566 | goto exit_init_data; | |
5567 | } | |
0fdd1e2c | 5568 | } |
44a5e5eb DG |
5569 | |
5570 | /* Set health check Unix path */ | |
5571 | if (strlen(health_unix_sock_path) == 0) { | |
4a15001e MD |
5572 | ret = snprintf(health_unix_sock_path, |
5573 | sizeof(health_unix_sock_path), | |
5574 | DEFAULT_HOME_HEALTH_UNIX_SOCK, | |
5575 | home_path); | |
5576 | if (ret < 0) { | |
5577 | retval = -1; | |
5578 | goto exit_init_data; | |
5579 | } | |
44a5e5eb | 5580 | } |
fac6795d DG |
5581 | } |
5582 | ||
c9cb3e7d JG |
5583 | lockfile_fd = create_lockfile(); |
5584 | if (lockfile_fd < 0) { | |
4a15001e MD |
5585 | retval = -1; |
5586 | goto exit_init_data; | |
c9cb3e7d JG |
5587 | } |
5588 | ||
5c827ce0 DG |
5589 | /* Set consumer initial state */ |
5590 | kernel_consumerd_state = CONSUMER_STOPPED; | |
5591 | ust_consumerd_state = CONSUMER_STOPPED; | |
5592 | ||
847177cd DG |
5593 | DBG("Client socket path %s", client_unix_sock_path); |
5594 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 5595 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
5596 | DBG("LTTng run directory path: %s", rundir); |
5597 | ||
5598 | /* 32 bits consumerd path setup */ | |
4a15001e | 5599 | ret = snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5600 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5601 | if (ret < 0) { |
5602 | PERROR("snprintf 32-bit consumer error socket path"); | |
5603 | retval = -1; | |
5604 | goto exit_init_data; | |
5605 | } | |
5606 | ret = snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5607 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5608 | if (ret < 0) { |
5609 | PERROR("snprintf 32-bit consumer command socket path"); | |
5610 | retval = -1; | |
5611 | goto exit_init_data; | |
5612 | } | |
67e40797 DG |
5613 | |
5614 | DBG2("UST consumer 32 bits err path: %s", | |
5615 | ustconsumer32_data.err_unix_sock_path); | |
5616 | DBG2("UST consumer 32 bits cmd path: %s", | |
5617 | ustconsumer32_data.cmd_unix_sock_path); | |
5618 | ||
5619 | /* 64 bits consumerd path setup */ | |
4a15001e | 5620 | ret = snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5621 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5622 | if (ret < 0) { |
5623 | PERROR("snprintf 64-bit consumer error socket path"); | |
5624 | retval = -1; | |
5625 | goto exit_init_data; | |
5626 | } | |
5627 | ret = snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5628 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5629 | if (ret < 0) { |
5630 | PERROR("snprintf 64-bit consumer command socket path"); | |
5631 | retval = -1; | |
5632 | goto exit_init_data; | |
5633 | } | |
67e40797 DG |
5634 | |
5635 | DBG2("UST consumer 64 bits err path: %s", | |
5636 | ustconsumer64_data.err_unix_sock_path); | |
5637 | DBG2("UST consumer 64 bits cmd path: %s", | |
5638 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 5639 | |
273ea72c | 5640 | /* |
7d8234d9 | 5641 | * See if daemon already exist. |
fac6795d | 5642 | */ |
4a15001e | 5643 | if (check_existing_daemon()) { |
75462a81 | 5644 | ERR("Already running daemon.\n"); |
273ea72c | 5645 | /* |
cf3af59e MD |
5646 | * We do not goto exit because we must not cleanup() |
5647 | * because a daemon is already running. | |
ab118b20 | 5648 | */ |
4a15001e MD |
5649 | retval = -1; |
5650 | goto exit_init_data; | |
a88df331 DG |
5651 | } |
5652 | ||
1427f9b2 DG |
5653 | /* |
5654 | * Init UST app hash table. Alloc hash table before this point since | |
5655 | * cleanup() can get called after that point. | |
5656 | */ | |
4a15001e | 5657 | if (ust_app_ht_alloc()) { |
cd0f7e67 | 5658 | ERR("Failed to allocate UST app hash table"); |
4a15001e MD |
5659 | retval = -1; |
5660 | goto exit_init_data; | |
5661 | } | |
1427f9b2 | 5662 | |
5642e70b JG |
5663 | /* |
5664 | * Initialize agent app hash table. We allocate the hash table here | |
5665 | * since cleanup() can get called after this point. | |
5666 | */ | |
5667 | if (agent_app_ht_alloc()) { | |
5668 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e MD |
5669 | retval = -1; |
5670 | goto exit_init_data; | |
f20baf8e DG |
5671 | } |
5672 | ||
a88df331 DG |
5673 | /* |
5674 | * These actions must be executed as root. We do that *after* setting up | |
5675 | * the sockets path because we MUST make the check for another daemon using | |
5676 | * those paths *before* trying to set the kernel consumer sockets and init | |
5677 | * kernel tracer. | |
5678 | */ | |
5679 | if (is_root) { | |
4a15001e MD |
5680 | if (set_consumer_sockets(&kconsumer_data, rundir)) { |
5681 | retval = -1; | |
5682 | goto exit_init_data; | |
7753dea8 MD |
5683 | } |
5684 | ||
a88df331 | 5685 | /* Setup kernel tracer */ |
4fba7219 DG |
5686 | if (!opt_no_kernel) { |
5687 | init_kernel_tracer(); | |
89588270 DG |
5688 | if (kernel_tracer_fd >= 0) { |
5689 | ret = syscall_init_table(); | |
5690 | if (ret < 0) { | |
4a15001e MD |
5691 | ERR("Unable to populate syscall table. " |
5692 | "Syscall tracing won't work " | |
5693 | "for this session daemon."); | |
89588270 | 5694 | } |
834978fd | 5695 | } |
4fba7219 | 5696 | } |
a88df331 DG |
5697 | |
5698 | /* Set ulimit for open files */ | |
5699 | set_ulimit(); | |
fac6795d | 5700 | } |
4063050c MD |
5701 | /* init lttng_fd tracking must be done after set_ulimit. */ |
5702 | lttng_fd_init(); | |
fac6795d | 5703 | |
4a15001e MD |
5704 | if (set_consumer_sockets(&ustconsumer64_data, rundir)) { |
5705 | retval = -1; | |
5706 | goto exit_init_data; | |
67e40797 DG |
5707 | } |
5708 | ||
4a15001e MD |
5709 | if (set_consumer_sockets(&ustconsumer32_data, rundir)) { |
5710 | retval = -1; | |
5711 | goto exit_init_data; | |
67e40797 DG |
5712 | } |
5713 | ||
d6f42150 | 5714 | /* Setup the needed unix socket */ |
4a15001e MD |
5715 | if (init_daemon_socket()) { |
5716 | retval = -1; | |
5717 | goto exit_init_data; | |
fac6795d DG |
5718 | } |
5719 | ||
5720 | /* Set credentials to socket */ | |
4a15001e MD |
5721 | if (is_root && set_permissions(rundir)) { |
5722 | retval = -1; | |
5723 | goto exit_init_data; | |
fac6795d DG |
5724 | } |
5725 | ||
5b8719f5 DG |
5726 | /* Get parent pid if -S, --sig-parent is specified. */ |
5727 | if (opt_sig_parent) { | |
5728 | ppid = getppid(); | |
5729 | } | |
5730 | ||
7a485870 | 5731 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 | 5732 | if (is_root && !opt_no_kernel) { |
4a15001e MD |
5733 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
5734 | retval = -1; | |
5735 | goto exit_init_data; | |
6620da75 | 5736 | } |
7a485870 DG |
5737 | } |
5738 | ||
099e26bd | 5739 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
5740 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
5741 | retval = -1; | |
5742 | goto exit_init_data; | |
099e26bd DG |
5743 | } |
5744 | ||
d0b96690 | 5745 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
5746 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
5747 | retval = -1; | |
5748 | goto exit_init_data; | |
d0b96690 DG |
5749 | } |
5750 | ||
7972aab2 DG |
5751 | /* Initialize global buffer per UID and PID registry. */ |
5752 | buffer_reg_init_uid_registry(); | |
5753 | buffer_reg_init_pid_registry(); | |
5754 | ||
099e26bd | 5755 | /* Init UST command queue. */ |
8bdee6e2 | 5756 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 5757 | |
273ea72c | 5758 | /* |
4a15001e MD |
5759 | * Get session list pointer. This pointer MUST NOT be free'd. This list |
5760 | * is statically declared in session.c | |
273ea72c | 5761 | */ |
54d01ffb | 5762 | session_list_ptr = session_get_list(); |
b5541356 | 5763 | |
2f77fc4b | 5764 | cmd_init(); |
00e2e675 | 5765 | |
ae9e45b3 DG |
5766 | /* Check for the application socket timeout env variable. */ |
5767 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
5768 | if (env_app_timeout) { | |
5769 | app_socket_timeout = atoi(env_app_timeout); | |
5770 | } else { | |
5771 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
5772 | } | |
5773 | ||
4a15001e MD |
5774 | ret = write_pidfile(); |
5775 | if (ret) { | |
5776 | ERR("Error in write_pidfile"); | |
5777 | retval = -1; | |
5778 | goto exit_init_data; | |
5779 | } | |
5780 | ret = write_agent_port(); | |
5781 | if (ret) { | |
5782 | ERR("Error in write_agent_port"); | |
5783 | retval = -1; | |
5784 | goto exit_init_data; | |
5785 | } | |
35f90c40 | 5786 | |
554831e7 MD |
5787 | /* Initialize communication library */ |
5788 | lttcomm_init(); | |
4a15001e | 5789 | /* Initialize TCP timeout values */ |
d831c249 | 5790 | lttcomm_inet_init(); |
554831e7 | 5791 | |
ef367a93 | 5792 | if (load_session_init_data(&load_info) < 0) { |
4a15001e MD |
5793 | retval = -1; |
5794 | goto exit_init_data; | |
ef367a93 JG |
5795 | } |
5796 | load_info->path = opt_load_session_path; | |
5797 | ||
d5b9fd2f | 5798 | /* Create health-check thread */ |
44a5e5eb DG |
5799 | ret = pthread_create(&health_thread, NULL, |
5800 | thread_manage_health, (void *) NULL); | |
4a15001e MD |
5801 | if (ret) { |
5802 | errno = ret; | |
44a5e5eb | 5803 | PERROR("pthread_create health"); |
4a15001e | 5804 | retval = -1; |
44a5e5eb DG |
5805 | goto exit_health; |
5806 | } | |
5807 | ||
cf3af59e | 5808 | /* Create thread to manage the client socket */ |
099e26bd DG |
5809 | ret = pthread_create(&client_thread, NULL, |
5810 | thread_manage_clients, (void *) NULL); | |
4a15001e MD |
5811 | if (ret) { |
5812 | errno = ret; | |
76d7553f | 5813 | PERROR("pthread_create clients"); |
4a15001e | 5814 | retval = -1; |
cf3af59e MD |
5815 | goto exit_client; |
5816 | } | |
fac6795d | 5817 | |
099e26bd DG |
5818 | /* Create thread to dispatch registration */ |
5819 | ret = pthread_create(&dispatch_thread, NULL, | |
5820 | thread_dispatch_ust_registration, (void *) NULL); | |
4a15001e MD |
5821 | if (ret) { |
5822 | errno = ret; | |
76d7553f | 5823 | PERROR("pthread_create dispatch"); |
4a15001e | 5824 | retval = -1; |
099e26bd DG |
5825 | goto exit_dispatch; |
5826 | } | |
5827 | ||
5828 | /* Create thread to manage application registration. */ | |
5829 | ret = pthread_create(®_apps_thread, NULL, | |
5830 | thread_registration_apps, (void *) NULL); | |
4a15001e MD |
5831 | if (ret) { |
5832 | errno = ret; | |
76d7553f | 5833 | PERROR("pthread_create registration"); |
4a15001e | 5834 | retval = -1; |
099e26bd DG |
5835 | goto exit_reg_apps; |
5836 | } | |
5837 | ||
cf3af59e | 5838 | /* Create thread to manage application socket */ |
54d01ffb DG |
5839 | ret = pthread_create(&apps_thread, NULL, |
5840 | thread_manage_apps, (void *) NULL); | |
4a15001e MD |
5841 | if (ret) { |
5842 | errno = ret; | |
d0b96690 | 5843 | PERROR("pthread_create apps"); |
4a15001e | 5844 | retval = -1; |
d0b96690 DG |
5845 | goto exit_apps; |
5846 | } | |
5847 | ||
5848 | /* Create thread to manage application notify socket */ | |
5849 | ret = pthread_create(&apps_notify_thread, NULL, | |
5850 | ust_thread_manage_notify, (void *) NULL); | |
4a15001e MD |
5851 | if (ret) { |
5852 | errno = ret; | |
f5c32ef1 | 5853 | PERROR("pthread_create notify"); |
4a15001e | 5854 | retval = -1; |
9563b0ad | 5855 | goto exit_apps_notify; |
cf3af59e | 5856 | } |
fac6795d | 5857 | |
022d91ba DG |
5858 | /* Create agent registration thread. */ |
5859 | ret = pthread_create(&agent_reg_thread, NULL, | |
5860 | agent_thread_manage_registration, (void *) NULL); | |
4a15001e MD |
5861 | if (ret) { |
5862 | errno = ret; | |
022d91ba | 5863 | PERROR("pthread_create agent"); |
4a15001e | 5864 | retval = -1; |
022d91ba | 5865 | goto exit_agent_reg; |
4d076222 DG |
5866 | } |
5867 | ||
6620da75 DG |
5868 | /* Don't start this thread if kernel tracing is not requested nor root */ |
5869 | if (is_root && !opt_no_kernel) { | |
5870 | /* Create kernel thread to manage kernel event */ | |
5871 | ret = pthread_create(&kernel_thread, NULL, | |
5872 | thread_manage_kernel, (void *) NULL); | |
4a15001e MD |
5873 | if (ret) { |
5874 | errno = ret; | |
6620da75 | 5875 | PERROR("pthread_create kernel"); |
4a15001e | 5876 | retval = -1; |
6620da75 DG |
5877 | goto exit_kernel; |
5878 | } | |
ef367a93 | 5879 | } |
7a485870 | 5880 | |
4a15001e MD |
5881 | /* Create session loading thread. */ |
5882 | ret = pthread_create(&load_session_thread, NULL, thread_load_session, | |
5883 | load_info); | |
5884 | if (ret) { | |
5885 | errno = ret; | |
5886 | PERROR("pthread_create load_session_thread"); | |
5887 | retval = -1; | |
5888 | goto exit_load_session; | |
5889 | } | |
5890 | ||
5891 | /* | |
5892 | * This is where we start awaiting program completion (e.g. through | |
5893 | * signal that asks threads to teardown). | |
5894 | */ | |
5895 | ||
5896 | ret = pthread_join(load_session_thread, &status); | |
5897 | if (ret) { | |
5898 | errno = ret; | |
5899 | PERROR("pthread_join load_session_thread"); | |
5900 | retval = -1; | |
5901 | } | |
5902 | exit_load_session: | |
ef367a93 JG |
5903 | |
5904 | if (is_root && !opt_no_kernel) { | |
6620da75 | 5905 | ret = pthread_join(kernel_thread, &status); |
4a15001e MD |
5906 | if (ret) { |
5907 | errno = ret; | |
6620da75 | 5908 | PERROR("pthread_join"); |
4a15001e | 5909 | retval = -1; |
6620da75 | 5910 | } |
fac6795d | 5911 | } |
cf3af59e | 5912 | exit_kernel: |
4a15001e | 5913 | |
022d91ba | 5914 | ret = pthread_join(agent_reg_thread, &status); |
4a15001e MD |
5915 | if (ret) { |
5916 | errno = ret; | |
022d91ba | 5917 | PERROR("pthread_join agent"); |
4a15001e | 5918 | retval = -1; |
4d076222 | 5919 | } |
022d91ba | 5920 | exit_agent_reg: |
4a15001e | 5921 | |
9563b0ad | 5922 | ret = pthread_join(apps_notify_thread, &status); |
4a15001e MD |
5923 | if (ret) { |
5924 | errno = ret; | |
9563b0ad | 5925 | PERROR("pthread_join apps notify"); |
4a15001e | 5926 | retval = -1; |
9563b0ad | 5927 | } |
9563b0ad | 5928 | exit_apps_notify: |
4a15001e | 5929 | |
cf3af59e | 5930 | ret = pthread_join(apps_thread, &status); |
4a15001e MD |
5931 | if (ret) { |
5932 | errno = ret; | |
9563b0ad | 5933 | PERROR("pthread_join apps"); |
4a15001e | 5934 | retval = -1; |
cf3af59e | 5935 | } |
cf3af59e | 5936 | exit_apps: |
4a15001e | 5937 | |
099e26bd | 5938 | ret = pthread_join(reg_apps_thread, &status); |
4a15001e MD |
5939 | if (ret) { |
5940 | errno = ret; | |
76d7553f | 5941 | PERROR("pthread_join"); |
4a15001e | 5942 | retval = -1; |
099e26bd | 5943 | } |
099e26bd | 5944 | exit_reg_apps: |
4a15001e | 5945 | |
099e26bd | 5946 | ret = pthread_join(dispatch_thread, &status); |
4a15001e MD |
5947 | if (ret) { |
5948 | errno = ret; | |
76d7553f | 5949 | PERROR("pthread_join"); |
4a15001e | 5950 | retval = -1; |
099e26bd | 5951 | } |
099e26bd | 5952 | exit_dispatch: |
4a15001e | 5953 | |
cf3af59e | 5954 | ret = pthread_join(client_thread, &status); |
4a15001e MD |
5955 | if (ret) { |
5956 | errno = ret; | |
76d7553f | 5957 | PERROR("pthread_join"); |
4a15001e | 5958 | retval = -1; |
cf3af59e | 5959 | } |
4a15001e | 5960 | exit_client: |
a88df331 | 5961 | |
4a15001e MD |
5962 | ret = pthread_join(health_thread, &status); |
5963 | if (ret) { | |
5964 | errno = ret; | |
5965 | PERROR("pthread_join health thread"); | |
5966 | retval = -1; | |
06f525de | 5967 | } |
4a15001e | 5968 | exit_health: |
06f525de | 5969 | |
4a15001e MD |
5970 | exit_init_data: |
5971 | /* | |
5972 | * sessiond_cleanup() is called when no other thread is running, except | |
5973 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
5974 | */ | |
5975 | rcu_thread_online(); | |
5976 | sessiond_cleanup(); | |
5977 | rcu_thread_offline(); | |
5978 | rcu_unregister_thread(); | |
06f525de | 5979 | |
4a15001e MD |
5980 | ret = notify_thread_pipe(ht_cleanup_quit_pipe[1]); |
5981 | if (ret < 0) { | |
5982 | ERR("write error on ht_cleanup quit pipe"); | |
5983 | retval = -1; | |
06f525de DG |
5984 | } |
5985 | ||
0b2dc8df | 5986 | ret = pthread_join(ht_cleanup_thread, &status); |
4a15001e MD |
5987 | if (ret) { |
5988 | errno = ret; | |
0b2dc8df | 5989 | PERROR("pthread_join ht cleanup thread"); |
4a15001e | 5990 | retval = -1; |
0b2dc8df MD |
5991 | } |
5992 | exit_ht_cleanup: | |
25b397f9 | 5993 | exit_set_max_size: |
4a15001e MD |
5994 | |
5995 | utils_close_pipe(ht_cleanup_pipe); | |
5996 | exit_ht_cleanup_pipe: | |
5997 | ||
cf3af59e | 5998 | /* |
4a15001e | 5999 | * Close the ht_cleanup quit pipe. |
cf3af59e | 6000 | */ |
4a15001e MD |
6001 | utils_close_pipe(ht_cleanup_quit_pipe); |
6002 | exit_ht_cleanup_quit_pipe: | |
6003 | ||
6004 | health_app_destroy(health_sessiond); | |
6005 | exit_health_sessiond_cleanup: | |
6006 | ||
6007 | exit_options: | |
6008 | sessiond_cleanup_options(); | |
6009 | ||
6010 | exit_set_signal_handler: | |
6011 | if (!retval) { | |
cf3af59e | 6012 | exit(EXIT_SUCCESS); |
4a15001e MD |
6013 | } else { |
6014 | exit(EXIT_FAILURE); | |
67e40797 | 6015 | } |
fac6795d | 6016 | } |