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 | */ | |
39f0f159 | 1988 | (void) ust_app_register_done(app); |
d88aee68 DG |
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 | ||
7dac4903 MD |
2030 | /* Empty command queue. */ |
2031 | for (;;) { | |
2032 | /* Dequeue command for registration */ | |
2033 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); | |
2034 | if (node == NULL) { | |
2035 | break; | |
2036 | } | |
2037 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
2038 | ret = close(ust_cmd->sock); | |
2039 | if (ret < 0) { | |
2040 | PERROR("close ust sock exit dispatch %d", ust_cmd->sock); | |
2041 | } | |
2042 | lttng_fd_put(LTTNG_FD_APPS, 1); | |
2043 | free(ust_cmd); | |
2044 | } | |
2045 | ||
9ad42ec1 | 2046 | error_testpoint: |
099e26bd | 2047 | DBG("Dispatch thread dying"); |
12e2b881 MD |
2048 | if (err) { |
2049 | health_error(); | |
2050 | ERR("Health error occurred in %s", __func__); | |
2051 | } | |
8782cc74 | 2052 | health_unregister(health_sessiond); |
099e26bd DG |
2053 | return NULL; |
2054 | } | |
2055 | ||
2056 | /* | |
2057 | * This thread manage application registration. | |
2058 | */ | |
2059 | static void *thread_registration_apps(void *data) | |
1d4b027a | 2060 | { |
139ac872 | 2061 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
2062 | uint32_t revents, nb_fd; |
2063 | struct lttng_poll_event events; | |
099e26bd DG |
2064 | /* |
2065 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
2066 | * freed in the manage apps thread. | |
2067 | */ | |
2068 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 2069 | |
099e26bd | 2070 | DBG("[thread] Manage application registration started"); |
1d4b027a | 2071 | |
6c71277b | 2072 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 2073 | |
e547b070 | 2074 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
2075 | goto error_testpoint; |
2076 | } | |
8ac94142 | 2077 | |
1d4b027a DG |
2078 | ret = lttcomm_listen_unix_sock(apps_sock); |
2079 | if (ret < 0) { | |
76d7553f | 2080 | goto error_listen; |
1d4b027a DG |
2081 | } |
2082 | ||
5eb91c98 DG |
2083 | /* |
2084 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
2085 | * more will be added to this poll set. | |
2086 | */ | |
d0b96690 | 2087 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 2088 | if (ret < 0) { |
76d7553f | 2089 | goto error_create_poll; |
5eb91c98 | 2090 | } |
273ea72c | 2091 | |
5eb91c98 DG |
2092 | /* Add the application registration socket */ |
2093 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
2094 | if (ret < 0) { | |
76d7553f | 2095 | goto error_poll_add; |
5eb91c98 | 2096 | } |
273ea72c | 2097 | |
1d4b027a | 2098 | /* Notify all applications to register */ |
0fdd1e2c DG |
2099 | ret = notify_ust_apps(1); |
2100 | if (ret < 0) { | |
2101 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
2102 | "Execution continues but there might be problem for already\n" |
2103 | "running applications that wishes to register."); | |
0fdd1e2c | 2104 | } |
1d4b027a DG |
2105 | |
2106 | while (1) { | |
2107 | DBG("Accepting application registration"); | |
273ea72c DG |
2108 | |
2109 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 2110 | restart: |
a78af745 | 2111 | health_poll_entry(); |
5eb91c98 | 2112 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 2113 | health_poll_exit(); |
273ea72c | 2114 | if (ret < 0) { |
88f2b785 MD |
2115 | /* |
2116 | * Restart interrupted system call. | |
2117 | */ | |
2118 | if (errno == EINTR) { | |
2119 | goto restart; | |
2120 | } | |
273ea72c DG |
2121 | goto error; |
2122 | } | |
2123 | ||
0d9c5d77 DG |
2124 | nb_fd = ret; |
2125 | ||
5eb91c98 | 2126 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 2127 | health_code_update(); |
139ac872 | 2128 | |
5eb91c98 DG |
2129 | /* Fetch once the poll data */ |
2130 | revents = LTTNG_POLL_GETEV(&events, i); | |
2131 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 2132 | |
fd20dac9 MD |
2133 | if (!revents) { |
2134 | /* No activity for this FD (poll implementation). */ | |
2135 | continue; | |
2136 | } | |
2137 | ||
5eb91c98 | 2138 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 2139 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 2140 | if (ret) { |
139ac872 MD |
2141 | err = 0; |
2142 | goto exit; | |
90014c57 | 2143 | } |
1d4b027a | 2144 | |
5eb91c98 DG |
2145 | /* Event on the registration socket */ |
2146 | if (pollfd == apps_sock) { | |
2147 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2148 | ERR("Register apps socket poll error"); | |
2149 | goto error; | |
2150 | } else if (revents & LPOLLIN) { | |
2151 | sock = lttcomm_accept_unix_sock(apps_sock); | |
2152 | if (sock < 0) { | |
2153 | goto error; | |
2154 | } | |
099e26bd | 2155 | |
16c5c8fa DG |
2156 | /* |
2157 | * Set socket timeout for both receiving and ending. | |
2158 | * app_socket_timeout is in seconds, whereas | |
2159 | * lttcomm_setsockopt_rcv_timeout and | |
2160 | * lttcomm_setsockopt_snd_timeout expect msec as | |
2161 | * parameter. | |
2162 | */ | |
2163 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
2164 | app_socket_timeout * 1000); | |
2165 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
2166 | app_socket_timeout * 1000); | |
2167 | ||
b662582b DG |
2168 | /* |
2169 | * Set the CLOEXEC flag. Return code is useless because | |
2170 | * either way, the show must go on. | |
2171 | */ | |
2172 | (void) utils_set_fd_cloexec(sock); | |
2173 | ||
5eb91c98 | 2174 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 2175 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 2176 | if (ust_cmd == NULL) { |
76d7553f | 2177 | PERROR("ust command zmalloc"); |
ba6e4263 MD |
2178 | ret = close(sock); |
2179 | if (ret) { | |
2180 | PERROR("close"); | |
2181 | } | |
5eb91c98 DG |
2182 | goto error; |
2183 | } | |
1d4b027a | 2184 | |
5eb91c98 DG |
2185 | /* |
2186 | * Using message-based transmissions to ensure we don't | |
2187 | * have to deal with partially received messages. | |
2188 | */ | |
4063050c MD |
2189 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
2190 | if (ret < 0) { | |
2191 | ERR("Exhausted file descriptors allowed for applications."); | |
2192 | free(ust_cmd); | |
2193 | ret = close(sock); | |
2194 | if (ret) { | |
2195 | PERROR("close"); | |
2196 | } | |
2197 | sock = -1; | |
2198 | continue; | |
2199 | } | |
d88aee68 | 2200 | |
840cb59c | 2201 | health_code_update(); |
d0b96690 DG |
2202 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
2203 | if (ret < 0) { | |
5eb91c98 | 2204 | free(ust_cmd); |
d0b96690 | 2205 | /* Close socket of the application. */ |
76d7553f MD |
2206 | ret = close(sock); |
2207 | if (ret) { | |
2208 | PERROR("close"); | |
2209 | } | |
4063050c | 2210 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 2211 | sock = -1; |
5eb91c98 DG |
2212 | continue; |
2213 | } | |
840cb59c | 2214 | health_code_update(); |
099e26bd | 2215 | |
5eb91c98 | 2216 | ust_cmd->sock = sock; |
34a2494f | 2217 | sock = -1; |
099e26bd | 2218 | |
5eb91c98 DG |
2219 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2220 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2221 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2222 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2223 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2224 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2225 | |
5eb91c98 DG |
2226 | /* |
2227 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2228 | * has been taken! This apps will be part of the *system*. |
5eb91c98 | 2229 | */ |
8bdee6e2 | 2230 | cds_wfcq_enqueue(&ust_cmd_queue.head, &ust_cmd_queue.tail, &ust_cmd->node); |
5eb91c98 DG |
2231 | |
2232 | /* | |
2233 | * Wake the registration queue futex. Implicit memory | |
8bdee6e2 | 2234 | * barrier with the exchange in cds_wfcq_enqueue. |
5eb91c98 DG |
2235 | */ |
2236 | futex_nto1_wake(&ust_cmd_queue.futex); | |
2237 | } | |
2238 | } | |
90014c57 | 2239 | } |
1d4b027a DG |
2240 | } |
2241 | ||
139ac872 | 2242 | exit: |
1d4b027a | 2243 | error: |
0fdd1e2c DG |
2244 | /* Notify that the registration thread is gone */ |
2245 | notify_ust_apps(0); | |
2246 | ||
a4b35e07 | 2247 | if (apps_sock >= 0) { |
76d7553f MD |
2248 | ret = close(apps_sock); |
2249 | if (ret) { | |
2250 | PERROR("close"); | |
2251 | } | |
a4b35e07 | 2252 | } |
46c3f085 | 2253 | if (sock >= 0) { |
76d7553f MD |
2254 | ret = close(sock); |
2255 | if (ret) { | |
2256 | PERROR("close"); | |
2257 | } | |
4063050c | 2258 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2259 | } |
273ea72c | 2260 | unlink(apps_unix_sock_path); |
0fdd1e2c | 2261 | |
76d7553f | 2262 | error_poll_add: |
5eb91c98 | 2263 | lttng_poll_clean(&events); |
76d7553f MD |
2264 | error_listen: |
2265 | error_create_poll: | |
6993eeb3 | 2266 | error_testpoint: |
76d7553f | 2267 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2268 | if (err) { |
2269 | health_error(); | |
2270 | ERR("Health error occurred in %s", __func__); | |
2271 | } | |
8782cc74 | 2272 | health_unregister(health_sessiond); |
5eb91c98 | 2273 | |
1d4b027a DG |
2274 | return NULL; |
2275 | } | |
2276 | ||
8c0faa1d | 2277 | /* |
3bd1e081 | 2278 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2279 | * exec or it will fails. |
8c0faa1d | 2280 | */ |
3bd1e081 | 2281 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2282 | { |
a23ec3a7 | 2283 | int ret, clock_ret; |
ee0b0061 DG |
2284 | struct timespec timeout; |
2285 | ||
a23ec3a7 DG |
2286 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
2287 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 2288 | |
a23ec3a7 DG |
2289 | /* Setup pthread condition */ |
2290 | ret = pthread_condattr_init(&consumer_data->condattr); | |
4a15001e | 2291 | if (ret) { |
a23ec3a7 DG |
2292 | errno = ret; |
2293 | PERROR("pthread_condattr_init consumer data"); | |
2294 | goto error; | |
2295 | } | |
2296 | ||
2297 | /* | |
2298 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2299 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2300 | * for a more details and how we noticed it. | |
2301 | */ | |
2302 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
4a15001e | 2303 | if (ret) { |
a23ec3a7 DG |
2304 | errno = ret; |
2305 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2306 | goto error; |
2307 | } | |
8c0faa1d | 2308 | |
a23ec3a7 | 2309 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
4a15001e | 2310 | if (ret) { |
a23ec3a7 DG |
2311 | errno = ret; |
2312 | PERROR("pthread_cond_init consumer data"); | |
2313 | goto error; | |
2314 | } | |
2315 | ||
2316 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
2317 | consumer_data); | |
4a15001e MD |
2318 | if (ret) { |
2319 | errno = ret; | |
3bd1e081 | 2320 | PERROR("pthread_create consumer"); |
ee0b0061 | 2321 | ret = -1; |
8c0faa1d DG |
2322 | goto error; |
2323 | } | |
2324 | ||
a23ec3a7 DG |
2325 | /* We are about to wait on a pthread condition */ |
2326 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2327 | ||
ee0b0061 | 2328 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
2329 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
2330 | /* | |
2331 | * Set the timeout for the condition timed wait even if the clock gettime | |
2332 | * call fails since we might loop on that call and we want to avoid to | |
2333 | * increment the timeout too many times. | |
2334 | */ | |
2335 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2336 | ||
2337 | /* | |
2338 | * The following loop COULD be skipped in some conditions so this is why we | |
2339 | * set ret to 0 in order to make sure at least one round of the loop is | |
2340 | * done. | |
2341 | */ | |
2342 | ret = 0; | |
2343 | ||
2344 | /* | |
2345 | * Loop until the condition is reached or when a timeout is reached. Note | |
2346 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2347 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2348 | * possible. This loop does not take any chances and works with both of | |
2349 | * them. | |
2350 | */ | |
2351 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2352 | if (clock_ret < 0) { | |
2353 | PERROR("clock_gettime spawn consumer"); | |
2354 | /* Infinite wait for the consumerd thread to be ready */ | |
2355 | ret = pthread_cond_wait(&consumer_data->cond, | |
2356 | &consumer_data->cond_mutex); | |
2357 | } else { | |
2358 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2359 | &consumer_data->cond_mutex, &timeout); | |
2360 | } | |
ee0b0061 | 2361 | } |
8c0faa1d | 2362 | |
a23ec3a7 DG |
2363 | /* Release the pthread condition */ |
2364 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2365 | ||
2366 | if (ret != 0) { | |
2367 | errno = ret; | |
2368 | if (ret == ETIMEDOUT) { | |
4282f9a3 DG |
2369 | int pth_ret; |
2370 | ||
ee0b0061 DG |
2371 | /* |
2372 | * Call has timed out so we kill the kconsumerd_thread and return | |
2373 | * an error. | |
2374 | */ | |
a23ec3a7 DG |
2375 | ERR("Condition timed out. The consumer thread was never ready." |
2376 | " Killing it"); | |
4282f9a3 DG |
2377 | pth_ret = pthread_cancel(consumer_data->thread); |
2378 | if (pth_ret < 0) { | |
3bd1e081 | 2379 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2380 | } |
2381 | } else { | |
a23ec3a7 | 2382 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 | 2383 | } |
4282f9a3 DG |
2384 | /* Caller is expecting a negative value on failure. */ |
2385 | ret = -1; | |
ee0b0061 DG |
2386 | goto error; |
2387 | } | |
2388 | ||
3bd1e081 MD |
2389 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2390 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2391 | ERR("Consumerd did not start"); |
3bd1e081 | 2392 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2393 | goto error; |
2394 | } | |
3bd1e081 | 2395 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2396 | |
8c0faa1d DG |
2397 | return 0; |
2398 | ||
2399 | error: | |
2400 | return ret; | |
2401 | } | |
2402 | ||
d9800920 | 2403 | /* |
3bd1e081 | 2404 | * Join consumer thread |
d9800920 | 2405 | */ |
3bd1e081 | 2406 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2407 | { |
2408 | void *status; | |
cf3af59e | 2409 | |
e8209f6b DG |
2410 | /* Consumer pid must be a real one. */ |
2411 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2412 | int ret; |
3bd1e081 | 2413 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2414 | if (ret) { |
4a15001e | 2415 | PERROR("Error killing consumer daemon"); |
cf3af59e MD |
2416 | return ret; |
2417 | } | |
3bd1e081 | 2418 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2419 | } else { |
2420 | return 0; | |
2421 | } | |
2422 | } | |
2423 | ||
8c0faa1d | 2424 | /* |
3bd1e081 | 2425 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2426 | * |
d063d709 | 2427 | * Return pid if successful else -1. |
8c0faa1d | 2428 | */ |
3bd1e081 | 2429 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2430 | { |
2431 | int ret; | |
2432 | pid_t pid; | |
94c55f17 | 2433 | const char *consumer_to_use; |
53086306 | 2434 | const char *verbosity; |
94c55f17 | 2435 | struct stat st; |
8c0faa1d | 2436 | |
3bd1e081 | 2437 | DBG("Spawning consumerd"); |
c49dc785 | 2438 | |
8c0faa1d DG |
2439 | pid = fork(); |
2440 | if (pid == 0) { | |
2441 | /* | |
3bd1e081 | 2442 | * Exec consumerd. |
8c0faa1d | 2443 | */ |
daee5345 | 2444 | if (opt_verbose_consumer) { |
53086306 | 2445 | verbosity = "--verbose"; |
4421f712 | 2446 | } else if (lttng_opt_quiet) { |
53086306 | 2447 | verbosity = "--quiet"; |
4421f712 DG |
2448 | } else { |
2449 | verbosity = ""; | |
53086306 | 2450 | } |
4421f712 | 2451 | |
3bd1e081 MD |
2452 | switch (consumer_data->type) { |
2453 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2454 | /* |
c7704d57 DG |
2455 | * Find out which consumerd to execute. We will first try the |
2456 | * 64-bit path, then the sessiond's installation directory, and | |
2457 | * fallback on the 32-bit one, | |
94c55f17 | 2458 | */ |
63a799e8 AM |
2459 | DBG3("Looking for a kernel consumer at these locations:"); |
2460 | DBG3(" 1) %s", consumerd64_bin); | |
2461 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
2462 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 2463 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 2464 | DBG3("Found location #1"); |
94c55f17 | 2465 | consumer_to_use = consumerd64_bin; |
94c55f17 | 2466 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 2467 | DBG3("Found location #2"); |
94c55f17 | 2468 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 2469 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 2470 | DBG3("Found location #3"); |
eb1e0bd4 | 2471 | consumer_to_use = consumerd32_bin; |
94c55f17 | 2472 | } else { |
63a799e8 | 2473 | DBG("Could not find any valid consumerd executable"); |
4282f9a3 | 2474 | ret = -EINVAL; |
94c55f17 AM |
2475 | break; |
2476 | } | |
2477 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
4282f9a3 | 2478 | ret = execl(consumer_to_use, |
94c55f17 AM |
2479 | "lttng-consumerd", verbosity, "-k", |
2480 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2481 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2482 | "--group", tracing_group_name, |
94c55f17 | 2483 | NULL); |
3bd1e081 | 2484 | break; |
7753dea8 MD |
2485 | case LTTNG_CONSUMER64_UST: |
2486 | { | |
b1e0b6b6 | 2487 | char *tmpnew = NULL; |
8f4905da MD |
2488 | |
2489 | if (consumerd64_libdir[0] != '\0') { | |
2490 | char *tmp; | |
2491 | size_t tmplen; | |
2492 | ||
e8fa9fb0 | 2493 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2494 | if (!tmp) { |
2495 | tmp = ""; | |
2496 | } | |
2497 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2498 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
2499 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2500 | if (!tmpnew) { | |
2501 | ret = -ENOMEM; | |
2502 | goto error; | |
2503 | } | |
2504 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2505 | strcat(tmpnew, consumerd64_libdir); | |
2506 | if (tmp[0] != '\0') { | |
2507 | strcat(tmpnew, ":"); | |
2508 | strcat(tmpnew, tmp); | |
2509 | } | |
2510 | ret = putenv(tmpnew); | |
2511 | if (ret) { | |
2512 | ret = -errno; | |
c6f76da9 | 2513 | free(tmpnew); |
8f4905da MD |
2514 | goto error; |
2515 | } | |
2516 | } | |
94c55f17 | 2517 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 2518 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2519 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2520 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2521 | "--group", tracing_group_name, |
7753dea8 | 2522 | NULL); |
8f4905da MD |
2523 | if (consumerd64_libdir[0] != '\0') { |
2524 | free(tmpnew); | |
2525 | } | |
3bd1e081 | 2526 | break; |
7753dea8 MD |
2527 | } |
2528 | case LTTNG_CONSUMER32_UST: | |
2529 | { | |
937dde8e | 2530 | char *tmpnew = NULL; |
8f4905da MD |
2531 | |
2532 | if (consumerd32_libdir[0] != '\0') { | |
2533 | char *tmp; | |
2534 | size_t tmplen; | |
2535 | ||
e8fa9fb0 | 2536 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2537 | if (!tmp) { |
2538 | tmp = ""; | |
2539 | } | |
2540 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2541 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2542 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2543 | if (!tmpnew) { | |
2544 | ret = -ENOMEM; | |
2545 | goto error; | |
2546 | } | |
2547 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2548 | strcat(tmpnew, consumerd32_libdir); | |
2549 | if (tmp[0] != '\0') { | |
2550 | strcat(tmpnew, ":"); | |
2551 | strcat(tmpnew, tmp); | |
2552 | } | |
2553 | ret = putenv(tmpnew); | |
2554 | if (ret) { | |
2555 | ret = -errno; | |
c6f76da9 | 2556 | free(tmpnew); |
8f4905da MD |
2557 | goto error; |
2558 | } | |
2559 | } | |
94c55f17 | 2560 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 2561 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2562 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2563 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2564 | "--group", tracing_group_name, |
7753dea8 | 2565 | NULL); |
8f4905da MD |
2566 | if (consumerd32_libdir[0] != '\0') { |
2567 | free(tmpnew); | |
2568 | } | |
7753dea8 MD |
2569 | break; |
2570 | } | |
3bd1e081 | 2571 | default: |
76d7553f | 2572 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2573 | exit(EXIT_FAILURE); |
2574 | } | |
8c0faa1d | 2575 | if (errno != 0) { |
4282f9a3 | 2576 | PERROR("Consumer execl()"); |
8c0faa1d | 2577 | } |
4282f9a3 | 2578 | /* Reaching this point, we got a failure on our execl(). */ |
8c0faa1d DG |
2579 | exit(EXIT_FAILURE); |
2580 | } else if (pid > 0) { | |
2581 | ret = pid; | |
8c0faa1d | 2582 | } else { |
76d7553f | 2583 | PERROR("start consumer fork"); |
8c0faa1d | 2584 | ret = -errno; |
8c0faa1d | 2585 | } |
8f4905da | 2586 | error: |
8c0faa1d DG |
2587 | return ret; |
2588 | } | |
2589 | ||
693bd40b | 2590 | /* |
3bd1e081 | 2591 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2592 | */ |
3bd1e081 | 2593 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2594 | { |
c617c0c6 | 2595 | int ret; |
edb8b045 DG |
2596 | |
2597 | /* | |
2598 | * Set the listen() state on the socket since there is a possible race | |
2599 | * between the exec() of the consumer daemon and this call if place in the | |
2600 | * consumer thread. See bug #366 for more details. | |
2601 | */ | |
2602 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2603 | if (ret < 0) { | |
2604 | goto error; | |
2605 | } | |
693bd40b | 2606 | |
3bd1e081 MD |
2607 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2608 | if (consumer_data->pid != 0) { | |
2609 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2610 | goto end; |
2611 | } | |
693bd40b | 2612 | |
3bd1e081 | 2613 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2614 | if (ret < 0) { |
3bd1e081 MD |
2615 | ERR("Spawning consumerd failed"); |
2616 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2617 | goto error; |
693bd40b | 2618 | } |
c49dc785 | 2619 | |
3bd1e081 MD |
2620 | /* Setting up the consumer_data pid */ |
2621 | consumer_data->pid = ret; | |
48842b30 | 2622 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2623 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2624 | |
3bd1e081 MD |
2625 | DBG2("Spawning consumer control thread"); |
2626 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2627 | if (ret < 0) { |
3bd1e081 | 2628 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2629 | goto error; |
2630 | } | |
2631 | ||
c49dc785 | 2632 | end: |
693bd40b DG |
2633 | return 0; |
2634 | ||
2635 | error: | |
331744e3 | 2636 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2637 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2638 | int err; |
2639 | ||
edb8b045 DG |
2640 | err = close(consumer_data->err_sock); |
2641 | if (err < 0) { | |
2642 | PERROR("close consumer data error socket"); | |
2643 | } | |
2644 | } | |
693bd40b DG |
2645 | return ret; |
2646 | } | |
2647 | ||
b73401da | 2648 | /* |
096102bd | 2649 | * Setup necessary data for kernel tracer action. |
b73401da | 2650 | */ |
096102bd | 2651 | static int init_kernel_tracer(void) |
b73401da DG |
2652 | { |
2653 | int ret; | |
b73401da | 2654 | |
096102bd DG |
2655 | /* Modprobe lttng kernel modules */ |
2656 | ret = modprobe_lttng_control(); | |
b73401da | 2657 | if (ret < 0) { |
b73401da DG |
2658 | goto error; |
2659 | } | |
2660 | ||
096102bd DG |
2661 | /* Open debugfs lttng */ |
2662 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2663 | if (kernel_tracer_fd < 0) { | |
2664 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
2665 | ret = -1; |
2666 | goto error_open; | |
54d01ffb DG |
2667 | } |
2668 | ||
2f77fc4b DG |
2669 | /* Validate kernel version */ |
2670 | ret = kernel_validate_version(kernel_tracer_fd); | |
2671 | if (ret < 0) { | |
2672 | goto error_version; | |
b551a063 | 2673 | } |
54d01ffb | 2674 | |
2f77fc4b DG |
2675 | ret = modprobe_lttng_data(); |
2676 | if (ret < 0) { | |
2677 | goto error_modules; | |
54d01ffb DG |
2678 | } |
2679 | ||
2f77fc4b DG |
2680 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2681 | return 0; | |
2682 | ||
2683 | error_version: | |
2684 | modprobe_remove_lttng_control(); | |
2685 | ret = close(kernel_tracer_fd); | |
2686 | if (ret) { | |
2687 | PERROR("close"); | |
b551a063 | 2688 | } |
2f77fc4b | 2689 | kernel_tracer_fd = -1; |
f73fabfd | 2690 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2691 | |
2f77fc4b DG |
2692 | error_modules: |
2693 | ret = close(kernel_tracer_fd); | |
2694 | if (ret) { | |
2695 | PERROR("close"); | |
b551a063 | 2696 | } |
54d01ffb | 2697 | |
2f77fc4b DG |
2698 | error_open: |
2699 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2700 | |
2701 | error: | |
2f77fc4b DG |
2702 | WARN("No kernel tracer available"); |
2703 | kernel_tracer_fd = -1; | |
2704 | if (!is_root) { | |
f73fabfd | 2705 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2706 | } else { |
f73fabfd | 2707 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2708 | } |
54d01ffb DG |
2709 | } |
2710 | ||
2f77fc4b | 2711 | |
54d01ffb | 2712 | /* |
2f77fc4b DG |
2713 | * Copy consumer output from the tracing session to the domain session. The |
2714 | * function also applies the right modification on a per domain basis for the | |
2715 | * trace files destination directory. | |
36b588ed MD |
2716 | * |
2717 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2718 | */ |
2f77fc4b | 2719 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2720 | { |
2721 | int ret; | |
2f77fc4b DG |
2722 | const char *dir_name; |
2723 | struct consumer_output *consumer; | |
2724 | ||
2725 | assert(session); | |
2726 | assert(session->consumer); | |
54d01ffb | 2727 | |
b551a063 DG |
2728 | switch (domain) { |
2729 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2730 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2731 | /* |
2732 | * XXX: We should audit the session creation and what this function | |
2733 | * does "extra" in order to avoid a destroy since this function is used | |
2734 | * in the domain session creation (kernel and ust) only. Same for UST | |
2735 | * domain. | |
2736 | */ | |
2737 | if (session->kernel_session->consumer) { | |
95a90d01 | 2738 | consumer_output_put(session->kernel_session->consumer); |
09a90bcd | 2739 | } |
2f77fc4b DG |
2740 | session->kernel_session->consumer = |
2741 | consumer_copy_output(session->consumer); | |
2742 | /* Ease our life a bit for the next part */ | |
2743 | consumer = session->kernel_session->consumer; | |
2744 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2745 | break; |
f20baf8e | 2746 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2747 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2748 | case LTTNG_DOMAIN_PYTHON: |
b551a063 | 2749 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2750 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd | 2751 | if (session->ust_session->consumer) { |
95a90d01 | 2752 | consumer_output_put(session->ust_session->consumer); |
09a90bcd | 2753 | } |
2f77fc4b DG |
2754 | session->ust_session->consumer = |
2755 | consumer_copy_output(session->consumer); | |
2756 | /* Ease our life a bit for the next part */ | |
2757 | consumer = session->ust_session->consumer; | |
2758 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2759 | break; |
2760 | default: | |
f73fabfd | 2761 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2762 | goto error; |
2763 | } | |
2764 | ||
2f77fc4b | 2765 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2766 | strncat(consumer->subdir, dir_name, |
2767 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2768 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2769 | ||
f73fabfd | 2770 | ret = LTTNG_OK; |
54d01ffb DG |
2771 | |
2772 | error: | |
2773 | return ret; | |
2774 | } | |
2775 | ||
00e2e675 | 2776 | /* |
2f77fc4b | 2777 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2778 | * |
2779 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2780 | */ |
2f77fc4b DG |
2781 | static int create_ust_session(struct ltt_session *session, |
2782 | struct lttng_domain *domain) | |
00e2e675 DG |
2783 | { |
2784 | int ret; | |
2f77fc4b | 2785 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2786 | |
a4b92340 | 2787 | assert(session); |
2f77fc4b DG |
2788 | assert(domain); |
2789 | assert(session->consumer); | |
a4b92340 | 2790 | |
2f77fc4b | 2791 | switch (domain->type) { |
f20baf8e | 2792 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2793 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2794 | case LTTNG_DOMAIN_PYTHON: |
2f77fc4b DG |
2795 | case LTTNG_DOMAIN_UST: |
2796 | break; | |
2797 | default: | |
2798 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2799 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2800 | goto error; |
2801 | } | |
2802 | ||
2f77fc4b DG |
2803 | DBG("Creating UST session"); |
2804 | ||
dec56f6c | 2805 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2806 | if (lus == NULL) { |
f73fabfd | 2807 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2808 | goto error; |
2809 | } | |
2810 | ||
2f77fc4b DG |
2811 | lus->uid = session->uid; |
2812 | lus->gid = session->gid; | |
2bba9e53 | 2813 | lus->output_traces = session->output_traces; |
27babd3a | 2814 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2815 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2816 | session->ust_session = lus; |
d7ba1388 | 2817 | if (session->shm_path[0]) { |
3d071855 MD |
2818 | strncpy(lus->root_shm_path, session->shm_path, |
2819 | sizeof(lus->root_shm_path)); | |
2820 | lus->root_shm_path[sizeof(lus->root_shm_path) - 1] = '\0'; | |
d7ba1388 MD |
2821 | strncpy(lus->shm_path, session->shm_path, |
2822 | sizeof(lus->shm_path)); | |
2823 | lus->shm_path[sizeof(lus->shm_path) - 1] = '\0'; | |
2824 | strncat(lus->shm_path, "/ust", | |
2825 | sizeof(lus->shm_path) - strlen(lus->shm_path) - 1); | |
2826 | } | |
2f77fc4b DG |
2827 | /* Copy session output to the newly created UST session */ |
2828 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2829 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2830 | goto error; |
2831 | } | |
2832 | ||
f73fabfd | 2833 | return LTTNG_OK; |
00e2e675 DG |
2834 | |
2835 | error: | |
2f77fc4b DG |
2836 | free(lus); |
2837 | session->ust_session = NULL; | |
00e2e675 DG |
2838 | return ret; |
2839 | } | |
2840 | ||
2841 | /* | |
2f77fc4b | 2842 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2843 | */ |
2f77fc4b | 2844 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2845 | { |
2846 | int ret; | |
a4b92340 | 2847 | |
2f77fc4b | 2848 | DBG("Creating kernel session"); |
00e2e675 | 2849 | |
2f77fc4b DG |
2850 | ret = kernel_create_session(session, kernel_tracer_fd); |
2851 | if (ret < 0) { | |
f73fabfd | 2852 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2853 | goto error; |
2854 | } | |
2855 | ||
2f77fc4b DG |
2856 | /* Code flow safety */ |
2857 | assert(session->kernel_session); | |
2858 | ||
2859 | /* Copy session output to the newly created Kernel session */ | |
2860 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2861 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2862 | goto error; |
2863 | } | |
2864 | ||
2f77fc4b DG |
2865 | /* Create directory(ies) on local filesystem. */ |
2866 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2867 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2868 | ret = run_as_mkdir_recursive( | |
2869 | session->kernel_session->consumer->dst.trace_path, | |
2870 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2871 | if (ret < 0) { | |
a68b8851 | 2872 | if (errno != EEXIST) { |
2f77fc4b | 2873 | ERR("Trace directory creation error"); |
00e2e675 DG |
2874 | goto error; |
2875 | } | |
00e2e675 | 2876 | } |
2f77fc4b | 2877 | } |
00e2e675 | 2878 | |
2f77fc4b DG |
2879 | session->kernel_session->uid = session->uid; |
2880 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2881 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2882 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2883 | |
f73fabfd | 2884 | return LTTNG_OK; |
00e2e675 | 2885 | |
2f77fc4b DG |
2886 | error: |
2887 | trace_kernel_destroy_session(session->kernel_session); | |
2888 | session->kernel_session = NULL; | |
2889 | return ret; | |
2890 | } | |
00e2e675 | 2891 | |
2f77fc4b DG |
2892 | /* |
2893 | * Count number of session permitted by uid/gid. | |
2894 | */ | |
2895 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2896 | { | |
2897 | unsigned int i = 0; | |
2898 | struct ltt_session *session; | |
07424f16 | 2899 | |
2f77fc4b DG |
2900 | DBG("Counting number of available session for UID %d GID %d", |
2901 | uid, gid); | |
2902 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2903 | /* |
2f77fc4b | 2904 | * Only list the sessions the user can control. |
00e2e675 | 2905 | */ |
2f77fc4b DG |
2906 | if (!session_access_ok(session, uid, gid)) { |
2907 | continue; | |
2908 | } | |
2909 | i++; | |
a4b92340 | 2910 | } |
2f77fc4b | 2911 | return i; |
00e2e675 DG |
2912 | } |
2913 | ||
54d01ffb DG |
2914 | /* |
2915 | * Process the command requested by the lttng client within the command | |
2916 | * context structure. This function make sure that the return structure (llm) | |
2917 | * is set and ready for transmission before returning. | |
2918 | * | |
2919 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2920 | * |
2921 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2922 | * |
2923 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2924 | */ |
53a80697 MD |
2925 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2926 | int *sock_error) | |
54d01ffb | 2927 | { |
f73fabfd | 2928 | int ret = LTTNG_OK; |
44d3bd01 | 2929 | int need_tracing_session = 1; |
2e09ba09 | 2930 | int need_domain; |
54d01ffb DG |
2931 | |
2932 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2933 | ||
53a80697 MD |
2934 | *sock_error = 0; |
2935 | ||
2e09ba09 MD |
2936 | switch (cmd_ctx->lsm->cmd_type) { |
2937 | case LTTNG_CREATE_SESSION: | |
27babd3a | 2938 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2939 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
2940 | case LTTNG_DESTROY_SESSION: |
2941 | case LTTNG_LIST_SESSIONS: | |
2942 | case LTTNG_LIST_DOMAINS: | |
2943 | case LTTNG_START_TRACE: | |
2944 | case LTTNG_STOP_TRACE: | |
6d805429 | 2945 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2946 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2947 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2948 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2949 | case LTTNG_SNAPSHOT_RECORD: | |
fb198a11 | 2950 | case LTTNG_SAVE_SESSION: |
d7ba1388 | 2951 | case LTTNG_SET_SESSION_SHM_PATH: |
2e09ba09 | 2952 | need_domain = 0; |
3aace903 | 2953 | break; |
2e09ba09 MD |
2954 | default: |
2955 | need_domain = 1; | |
2956 | } | |
2957 | ||
2958 | if (opt_no_kernel && need_domain | |
2959 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2960 | if (!is_root) { |
f73fabfd | 2961 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2962 | } else { |
f73fabfd | 2963 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2964 | } |
4fba7219 DG |
2965 | goto error; |
2966 | } | |
2967 | ||
8d3113b2 DG |
2968 | /* Deny register consumer if we already have a spawned consumer. */ |
2969 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2970 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2971 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2972 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2973 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2974 | goto error; |
2975 | } | |
2976 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2977 | } | |
2978 | ||
54d01ffb DG |
2979 | /* |
2980 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2981 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2982 | * command. |
2983 | */ | |
2984 | switch(cmd_ctx->lsm->cmd_type) { | |
2985 | case LTTNG_LIST_SESSIONS: | |
2986 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2987 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2988 | case LTTNG_LIST_DOMAINS: |
2989 | case LTTNG_LIST_CHANNELS: | |
2990 | case LTTNG_LIST_EVENTS: | |
834978fd | 2991 | case LTTNG_LIST_SYSCALLS: |
a5dfbb9d | 2992 | case LTTNG_LIST_TRACKER_PIDS: |
54d01ffb DG |
2993 | break; |
2994 | default: | |
2995 | /* Setup lttng message with no payload */ | |
2996 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2997 | if (ret < 0) { | |
2998 | /* This label does not try to unlock the session */ | |
2999 | goto init_setup_error; | |
3000 | } | |
3001 | } | |
3002 | ||
3003 | /* Commands that DO NOT need a session. */ | |
3004 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 3005 | case LTTNG_CREATE_SESSION: |
27babd3a | 3006 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 3007 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 | 3008 | case LTTNG_CALIBRATE: |
54d01ffb DG |
3009 | case LTTNG_LIST_SESSIONS: |
3010 | case LTTNG_LIST_TRACEPOINTS: | |
834978fd | 3011 | case LTTNG_LIST_SYSCALLS: |
f37d259d | 3012 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
fb198a11 | 3013 | case LTTNG_SAVE_SESSION: |
44d3bd01 | 3014 | need_tracing_session = 0; |
54d01ffb DG |
3015 | break; |
3016 | default: | |
3017 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
3018 | /* |
3019 | * We keep the session list lock across _all_ commands | |
3020 | * for now, because the per-session lock does not | |
3021 | * handle teardown properly. | |
3022 | */ | |
74babd95 | 3023 | session_lock_list(); |
54d01ffb DG |
3024 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
3025 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 3026 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
3027 | goto error; |
3028 | } else { | |
3029 | /* Acquire lock for the session */ | |
3030 | session_lock(cmd_ctx->session); | |
3031 | } | |
3032 | break; | |
3033 | } | |
b389abbe | 3034 | |
5f3ecf22 DG |
3035 | /* |
3036 | * Commands that need a valid session but should NOT create one if none | |
3037 | * exists. Instead of creating one and destroying it when the command is | |
3038 | * handled, process that right before so we save some round trip in useless | |
3039 | * code path. | |
3040 | */ | |
3041 | switch (cmd_ctx->lsm->cmd_type) { | |
3042 | case LTTNG_DISABLE_CHANNEL: | |
3043 | case LTTNG_DISABLE_EVENT: | |
5f3ecf22 DG |
3044 | switch (cmd_ctx->lsm->domain.type) { |
3045 | case LTTNG_DOMAIN_KERNEL: | |
3046 | if (!cmd_ctx->session->kernel_session) { | |
3047 | ret = LTTNG_ERR_NO_CHANNEL; | |
3048 | goto error; | |
3049 | } | |
3050 | break; | |
3051 | case LTTNG_DOMAIN_JUL: | |
5cdb6027 | 3052 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3053 | case LTTNG_DOMAIN_PYTHON: |
5f3ecf22 DG |
3054 | case LTTNG_DOMAIN_UST: |
3055 | if (!cmd_ctx->session->ust_session) { | |
3056 | ret = LTTNG_ERR_NO_CHANNEL; | |
3057 | goto error; | |
3058 | } | |
3059 | break; | |
3060 | default: | |
3061 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3062 | goto error; | |
3063 | } | |
3064 | default: | |
3065 | break; | |
3066 | } | |
3067 | ||
2e09ba09 MD |
3068 | if (!need_domain) { |
3069 | goto skip_domain; | |
3070 | } | |
a4b92340 | 3071 | |
54d01ffb DG |
3072 | /* |
3073 | * Check domain type for specific "pre-action". | |
3074 | */ | |
3075 | switch (cmd_ctx->lsm->domain.type) { | |
3076 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 3077 | if (!is_root) { |
f73fabfd | 3078 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
3079 | goto error; |
3080 | } | |
3081 | ||
54d01ffb | 3082 | /* Kernel tracer check */ |
a4b35e07 | 3083 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3084 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3085 | ret = init_kernel_tracer(); |
3086 | if (ret != 0) { | |
54d01ffb DG |
3087 | goto error; |
3088 | } | |
3089 | } | |
5eb91c98 | 3090 | |
5c827ce0 DG |
3091 | /* Consumer is in an ERROR state. Report back to client */ |
3092 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3093 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3094 | goto error; |
3095 | } | |
3096 | ||
54d01ffb | 3097 | /* Need a session for kernel command */ |
44d3bd01 | 3098 | if (need_tracing_session) { |
54d01ffb | 3099 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3100 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3101 | if (ret < 0) { |
f73fabfd | 3102 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
3103 | goto error; |
3104 | } | |
b389abbe | 3105 | } |
7d29a247 | 3106 | |
54d01ffb | 3107 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3108 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3109 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 3110 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3111 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3112 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3113 | if (ret < 0) { |
f73fabfd | 3114 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 3115 | goto error; |
950131af | 3116 | } |
5c827ce0 | 3117 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
3118 | } else { |
3119 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3120 | } |
173af62f | 3121 | |
a4b92340 DG |
3122 | /* |
3123 | * The consumer was just spawned so we need to add the socket to | |
3124 | * the consumer output of the session if exist. | |
3125 | */ | |
3126 | ret = consumer_create_socket(&kconsumer_data, | |
3127 | cmd_ctx->session->kernel_session->consumer); | |
3128 | if (ret < 0) { | |
3129 | goto error; | |
173af62f | 3130 | } |
0d0c377a | 3131 | } |
5c827ce0 | 3132 | |
54d01ffb | 3133 | break; |
b9dfb167 | 3134 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3135 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3136 | case LTTNG_DOMAIN_PYTHON: |
2bdd86d4 | 3137 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3138 | { |
b51ec5b4 MD |
3139 | if (!ust_app_supported()) { |
3140 | ret = LTTNG_ERR_NO_UST; | |
3141 | goto error; | |
3142 | } | |
5c827ce0 DG |
3143 | /* Consumer is in an ERROR state. Report back to client */ |
3144 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3145 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3146 | goto error; |
3147 | } | |
3148 | ||
44d3bd01 | 3149 | if (need_tracing_session) { |
a4b92340 | 3150 | /* Create UST session if none exist. */ |
f6a9efaa | 3151 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3152 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3153 | &cmd_ctx->lsm->domain); |
f73fabfd | 3154 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
3155 | goto error; |
3156 | } | |
3157 | } | |
00e2e675 | 3158 | |
7753dea8 MD |
3159 | /* Start the UST consumer daemons */ |
3160 | /* 64-bit */ | |
3161 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 3162 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 3163 | ustconsumer64_data.pid == 0 && |
785d2d0d | 3164 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3165 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3166 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3167 | if (ret < 0) { |
f73fabfd | 3168 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 3169 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
3170 | goto error; |
3171 | } | |
48842b30 | 3172 | |
173af62f | 3173 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 3174 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3175 | } else { |
7753dea8 MD |
3176 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3177 | } | |
173af62f DG |
3178 | |
3179 | /* | |
3180 | * Setup socket for consumer 64 bit. No need for atomic access | |
3181 | * since it was set above and can ONLY be set in this thread. | |
3182 | */ | |
a4b92340 DG |
3183 | ret = consumer_create_socket(&ustconsumer64_data, |
3184 | cmd_ctx->session->ust_session->consumer); | |
3185 | if (ret < 0) { | |
3186 | goto error; | |
173af62f DG |
3187 | } |
3188 | ||
7753dea8 | 3189 | /* 32-bit */ |
385b881b | 3190 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); |
fc7a59ce | 3191 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 3192 | ustconsumer32_data.pid == 0 && |
785d2d0d | 3193 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3194 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
3195 | ret = start_consumerd(&ustconsumer32_data); | |
3196 | if (ret < 0) { | |
f73fabfd | 3197 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 3198 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
3199 | goto error; |
3200 | } | |
5c827ce0 | 3201 | |
173af62f | 3202 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 3203 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3204 | } else { |
3205 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3206 | } |
173af62f DG |
3207 | |
3208 | /* | |
3209 | * Setup socket for consumer 64 bit. No need for atomic access | |
3210 | * since it was set above and can ONLY be set in this thread. | |
3211 | */ | |
a4b92340 DG |
3212 | ret = consumer_create_socket(&ustconsumer32_data, |
3213 | cmd_ctx->session->ust_session->consumer); | |
3214 | if (ret < 0) { | |
3215 | goto error; | |
173af62f | 3216 | } |
44d3bd01 DG |
3217 | } |
3218 | break; | |
48842b30 | 3219 | } |
54d01ffb | 3220 | default: |
54d01ffb DG |
3221 | break; |
3222 | } | |
2e09ba09 | 3223 | skip_domain: |
33a2b854 | 3224 | |
5c827ce0 DG |
3225 | /* Validate consumer daemon state when start/stop trace command */ |
3226 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3227 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3228 | switch (cmd_ctx->lsm->domain.type) { | |
b9dfb167 | 3229 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3230 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3231 | case LTTNG_DOMAIN_PYTHON: |
5c827ce0 DG |
3232 | case LTTNG_DOMAIN_UST: |
3233 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3234 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3235 | goto error; |
3236 | } | |
3237 | break; | |
3238 | case LTTNG_DOMAIN_KERNEL: | |
3239 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3240 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3241 | goto error; |
3242 | } | |
3243 | break; | |
3244 | } | |
3245 | } | |
3246 | ||
8e0af1b4 MD |
3247 | /* |
3248 | * Check that the UID or GID match that of the tracing session. | |
3249 | * The root user can interact with all sessions. | |
3250 | */ | |
3251 | if (need_tracing_session) { | |
3252 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3253 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3254 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 3255 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
3256 | goto error; |
3257 | } | |
3258 | } | |
3259 | ||
ffe60014 DG |
3260 | /* |
3261 | * Send relayd information to consumer as soon as we have a domain and a | |
3262 | * session defined. | |
3263 | */ | |
3264 | if (cmd_ctx->session && need_domain) { | |
3265 | /* | |
3266 | * Setup relayd if not done yet. If the relayd information was already | |
3267 | * sent to the consumer, this call will gracefully return. | |
3268 | */ | |
3269 | ret = cmd_setup_relayd(cmd_ctx->session); | |
3270 | if (ret != LTTNG_OK) { | |
3271 | goto error; | |
3272 | } | |
3273 | } | |
3274 | ||
54d01ffb DG |
3275 | /* Process by command type */ |
3276 | switch (cmd_ctx->lsm->cmd_type) { | |
3277 | case LTTNG_ADD_CONTEXT: | |
3278 | { | |
3279 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3280 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 3281 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
3282 | break; |
3283 | } | |
3284 | case LTTNG_DISABLE_CHANNEL: | |
3285 | { | |
3286 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3287 | cmd_ctx->lsm->u.disable.channel_name); | |
3288 | break; | |
3289 | } | |
3290 | case LTTNG_DISABLE_EVENT: | |
3291 | { | |
833984de JG |
3292 | |
3293 | /* | |
3294 | * FIXME: handle filter; for now we just receive the filter's | |
3295 | * bytecode along with the filter expression which are sent by | |
3296 | * liblttng-ctl and discard them. | |
3297 | * | |
3298 | * This fixes an issue where the client may block while sending | |
3299 | * the filter payload and encounter an error because the session | |
3300 | * daemon closes the socket without ever handling this data. | |
3301 | */ | |
3302 | size_t count = cmd_ctx->lsm->u.disable.expression_len + | |
3303 | cmd_ctx->lsm->u.disable.bytecode_len; | |
3304 | ||
3305 | if (count) { | |
3306 | char data[LTTNG_FILTER_MAX_LEN]; | |
3307 | ||
3308 | DBG("Discarding disable event command payload of size %zu", count); | |
3309 | while (count) { | |
3310 | ret = lttcomm_recv_unix_sock(sock, data, | |
3311 | count > sizeof(data) ? sizeof(data) : count); | |
3312 | if (ret < 0) { | |
3313 | goto error; | |
3314 | } | |
3315 | ||
3316 | count -= (size_t) ret; | |
3317 | } | |
3318 | } | |
6e911cad | 3319 | /* FIXME: passing packed structure to non-packed pointer */ |
54d01ffb DG |
3320 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3321 | cmd_ctx->lsm->u.disable.channel_name, | |
6e911cad | 3322 | &cmd_ctx->lsm->u.disable.event); |
33a2b854 DG |
3323 | break; |
3324 | } | |
54d01ffb DG |
3325 | case LTTNG_ENABLE_CHANNEL: |
3326 | { | |
7972aab2 | 3327 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 3328 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
3329 | break; |
3330 | } | |
ccf10263 MD |
3331 | case LTTNG_TRACK_PID: |
3332 | { | |
3333 | ret = cmd_track_pid(cmd_ctx->session, | |
3334 | cmd_ctx->lsm->domain.type, | |
3335 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3336 | break; | |
3337 | } | |
3338 | case LTTNG_UNTRACK_PID: | |
3339 | { | |
3340 | ret = cmd_untrack_pid(cmd_ctx->session, | |
3341 | cmd_ctx->lsm->domain.type, | |
3342 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3343 | break; | |
3344 | } | |
54d01ffb DG |
3345 | case LTTNG_ENABLE_EVENT: |
3346 | { | |
882ef835 JI |
3347 | struct lttng_event_exclusion *exclusion = NULL; |
3348 | struct lttng_filter_bytecode *bytecode = NULL; | |
6b453b5e | 3349 | char *filter_expression = NULL; |
882ef835 | 3350 | |
67676bd8 DG |
3351 | /* Handle exclusion events and receive it from the client. */ |
3352 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3353 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3354 | ||
3355 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3356 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3357 | if (!exclusion) { | |
3358 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3359 | goto error; | |
882ef835 | 3360 | } |
882ef835 | 3361 | |
67676bd8 DG |
3362 | DBG("Receiving var len exclusion event list from client ..."); |
3363 | exclusion->count = count; | |
3364 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3365 | count * LTTNG_SYMBOL_NAME_LEN); | |
3366 | if (ret <= 0) { | |
3367 | DBG("Nothing recv() from client var len data... continuing"); | |
3368 | *sock_error = 1; | |
3369 | free(exclusion); | |
3370 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3371 | goto error; | |
3372 | } | |
3373 | } | |
3374 | ||
6b453b5e JG |
3375 | /* Get filter expression from client. */ |
3376 | if (cmd_ctx->lsm->u.enable.expression_len > 0) { | |
3377 | size_t expression_len = | |
3378 | cmd_ctx->lsm->u.enable.expression_len; | |
3379 | ||
3380 | if (expression_len > LTTNG_FILTER_MAX_LEN) { | |
3381 | ret = LTTNG_ERR_FILTER_INVAL; | |
3382 | free(exclusion); | |
3383 | goto error; | |
3384 | } | |
3385 | ||
3386 | filter_expression = zmalloc(expression_len); | |
3387 | if (!filter_expression) { | |
3388 | free(exclusion); | |
3389 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3390 | goto error; | |
3391 | } | |
3392 | ||
3393 | /* Receive var. len. data */ | |
3394 | DBG("Receiving var len filter's expression from client ..."); | |
3395 | ret = lttcomm_recv_unix_sock(sock, filter_expression, | |
3396 | expression_len); | |
3397 | if (ret <= 0) { | |
3398 | DBG("Nothing recv() from client car len data... continuing"); | |
3399 | *sock_error = 1; | |
3400 | free(filter_expression); | |
3401 | free(exclusion); | |
3402 | ret = LTTNG_ERR_FILTER_INVAL; | |
3403 | goto error; | |
3404 | } | |
3405 | } | |
3406 | ||
67676bd8 DG |
3407 | /* Handle filter and get bytecode from client. */ |
3408 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3409 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3410 | ||
3411 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3412 | ret = LTTNG_ERR_FILTER_INVAL; | |
49d21f93 | 3413 | free(filter_expression); |
67676bd8 DG |
3414 | free(exclusion); |
3415 | goto error; | |
3416 | } | |
3417 | ||
3418 | bytecode = zmalloc(bytecode_len); | |
3419 | if (!bytecode) { | |
49d21f93 | 3420 | free(filter_expression); |
67676bd8 DG |
3421 | free(exclusion); |
3422 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3423 | goto error; | |
882ef835 JI |
3424 | } |
3425 | ||
67676bd8 DG |
3426 | /* Receive var. len. data */ |
3427 | DBG("Receiving var len filter's bytecode from client ..."); | |
3428 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3429 | if (ret <= 0) { | |
3430 | DBG("Nothing recv() from client car len data... continuing"); | |
3431 | *sock_error = 1; | |
49d21f93 | 3432 | free(filter_expression); |
67676bd8 DG |
3433 | free(bytecode); |
3434 | free(exclusion); | |
3435 | ret = LTTNG_ERR_FILTER_INVAL; | |
3436 | goto error; | |
3437 | } | |
3438 | ||
3439 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
49d21f93 | 3440 | free(filter_expression); |
67676bd8 DG |
3441 | free(bytecode); |
3442 | free(exclusion); | |
3443 | ret = LTTNG_ERR_FILTER_INVAL; | |
3444 | goto error; | |
3445 | } | |
882ef835 | 3446 | } |
67676bd8 DG |
3447 | |
3448 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3449 | cmd_ctx->lsm->u.enable.channel_name, | |
6b453b5e JG |
3450 | &cmd_ctx->lsm->u.enable.event, |
3451 | filter_expression, bytecode, exclusion, | |
67676bd8 | 3452 | kernel_poll_pipe[1]); |
54d01ffb DG |
3453 | break; |
3454 | } | |
052da939 | 3455 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3456 | { |
9f19cc17 | 3457 | struct lttng_event *events; |
54d01ffb | 3458 | ssize_t nb_events; |
052da939 | 3459 | |
0845bbfa | 3460 | session_lock_list(); |
54d01ffb | 3461 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
0845bbfa | 3462 | session_unlock_list(); |
54d01ffb | 3463 | if (nb_events < 0) { |
f73fabfd | 3464 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3465 | ret = -nb_events; |
3466 | goto error; | |
2ef84c95 DG |
3467 | } |
3468 | ||
3469 | /* | |
3470 | * Setup lttng message with payload size set to the event list size in | |
3471 | * bytes and then copy list into the llm payload. | |
3472 | */ | |
052da939 | 3473 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3474 | if (ret < 0) { |
052da939 | 3475 | free(events); |
2ef84c95 DG |
3476 | goto setup_error; |
3477 | } | |
3478 | ||
3479 | /* Copy event list into message payload */ | |
9f19cc17 | 3480 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3481 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3482 | |
9f19cc17 | 3483 | free(events); |
2ef84c95 | 3484 | |
f73fabfd | 3485 | ret = LTTNG_OK; |
2ef84c95 DG |
3486 | break; |
3487 | } | |
f37d259d MD |
3488 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3489 | { | |
3490 | struct lttng_event_field *fields; | |
3491 | ssize_t nb_fields; | |
3492 | ||
0845bbfa | 3493 | session_lock_list(); |
a4b92340 DG |
3494 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3495 | &fields); | |
0845bbfa | 3496 | session_unlock_list(); |
f37d259d | 3497 | if (nb_fields < 0) { |
f73fabfd | 3498 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3499 | ret = -nb_fields; |
3500 | goto error; | |
3501 | } | |
3502 | ||
3503 | /* | |
3504 | * Setup lttng message with payload size set to the event list size in | |
3505 | * bytes and then copy list into the llm payload. | |
3506 | */ | |
a4b92340 DG |
3507 | ret = setup_lttng_msg(cmd_ctx, |
3508 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
3509 | if (ret < 0) { |
3510 | free(fields); | |
3511 | goto setup_error; | |
3512 | } | |
3513 | ||
3514 | /* Copy event list into message payload */ | |
3515 | memcpy(cmd_ctx->llm->payload, fields, | |
3516 | sizeof(struct lttng_event_field) * nb_fields); | |
3517 | ||
3518 | free(fields); | |
3519 | ||
f73fabfd | 3520 | ret = LTTNG_OK; |
f37d259d MD |
3521 | break; |
3522 | } | |
834978fd DG |
3523 | case LTTNG_LIST_SYSCALLS: |
3524 | { | |
3525 | struct lttng_event *events; | |
3526 | ssize_t nb_events; | |
3527 | ||
3528 | nb_events = cmd_list_syscalls(&events); | |
3529 | if (nb_events < 0) { | |
3530 | /* Return value is a negative lttng_error_code. */ | |
3531 | ret = -nb_events; | |
3532 | goto error; | |
3533 | } | |
3534 | ||
3535 | /* | |
3536 | * Setup lttng message with payload size set to the event list size in | |
3537 | * bytes and then copy list into the llm payload. | |
3538 | */ | |
3539 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); | |
3540 | if (ret < 0) { | |
3541 | free(events); | |
3542 | goto setup_error; | |
3543 | } | |
3544 | ||
3545 | /* Copy event list into message payload */ | |
3546 | memcpy(cmd_ctx->llm->payload, events, | |
3547 | sizeof(struct lttng_event) * nb_events); | |
3548 | ||
3549 | free(events); | |
3550 | ||
3551 | ret = LTTNG_OK; | |
3552 | break; | |
3553 | } | |
a5dfbb9d MD |
3554 | case LTTNG_LIST_TRACKER_PIDS: |
3555 | { | |
3556 | int32_t *pids = NULL; | |
3557 | ssize_t nr_pids; | |
3558 | ||
3559 | nr_pids = cmd_list_tracker_pids(cmd_ctx->session, | |
3560 | cmd_ctx->lsm->domain.type, &pids); | |
3561 | if (nr_pids < 0) { | |
3562 | /* Return value is a negative lttng_error_code. */ | |
3563 | ret = -nr_pids; | |
3564 | goto error; | |
3565 | } | |
3566 | ||
3567 | /* | |
3568 | * Setup lttng message with payload size set to the event list size in | |
3569 | * bytes and then copy list into the llm payload. | |
3570 | */ | |
3571 | ret = setup_lttng_msg(cmd_ctx, sizeof(int32_t) * nr_pids); | |
3572 | if (ret < 0) { | |
3573 | free(pids); | |
3574 | goto setup_error; | |
3575 | } | |
3576 | ||
3577 | /* Copy event list into message payload */ | |
3578 | memcpy(cmd_ctx->llm->payload, pids, | |
3579 | sizeof(int) * nr_pids); | |
3580 | ||
3581 | free(pids); | |
3582 | ||
3583 | ret = LTTNG_OK; | |
3584 | break; | |
3585 | } | |
00e2e675 DG |
3586 | case LTTNG_SET_CONSUMER_URI: |
3587 | { | |
a4b92340 DG |
3588 | size_t nb_uri, len; |
3589 | struct lttng_uri *uris; | |
3590 | ||
3591 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3592 | len = nb_uri * sizeof(struct lttng_uri); | |
3593 | ||
3594 | if (nb_uri == 0) { | |
f73fabfd | 3595 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3596 | goto error; |
3597 | } | |
3598 | ||
3599 | uris = zmalloc(len); | |
3600 | if (uris == NULL) { | |
f73fabfd | 3601 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3602 | goto error; |
3603 | } | |
3604 | ||
3605 | /* Receive variable len data */ | |
77c7c900 | 3606 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3607 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3608 | if (ret <= 0) { | |
3609 | DBG("No URIs received from client... continuing"); | |
3610 | *sock_error = 1; | |
f73fabfd | 3611 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3612 | free(uris); |
a4b92340 DG |
3613 | goto error; |
3614 | } | |
3615 | ||
bda32d56 JG |
3616 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); |
3617 | free(uris); | |
f73fabfd | 3618 | if (ret != LTTNG_OK) { |
a4b92340 DG |
3619 | goto error; |
3620 | } | |
3621 | ||
b1d41407 | 3622 | |
00e2e675 DG |
3623 | break; |
3624 | } | |
f3ed775e | 3625 | case LTTNG_START_TRACE: |
8c0faa1d | 3626 | { |
54d01ffb | 3627 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3628 | break; |
3629 | } | |
f3ed775e | 3630 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3631 | { |
54d01ffb | 3632 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3633 | break; |
3634 | } | |
5e16da05 MD |
3635 | case LTTNG_CREATE_SESSION: |
3636 | { | |
a4b92340 DG |
3637 | size_t nb_uri, len; |
3638 | struct lttng_uri *uris = NULL; | |
3639 | ||
3640 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3641 | len = nb_uri * sizeof(struct lttng_uri); | |
3642 | ||
3643 | if (nb_uri > 0) { | |
3644 | uris = zmalloc(len); | |
3645 | if (uris == NULL) { | |
f73fabfd | 3646 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3647 | goto error; |
3648 | } | |
3649 | ||
3650 | /* Receive variable len data */ | |
77c7c900 | 3651 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3652 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3653 | if (ret <= 0) { | |
3654 | DBG("No URIs received from client... continuing"); | |
3655 | *sock_error = 1; | |
f73fabfd | 3656 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3657 | free(uris); |
a4b92340 DG |
3658 | goto error; |
3659 | } | |
3660 | ||
3661 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3662 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3663 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3664 | free(uris); |
a4b92340 DG |
3665 | goto error; |
3666 | } | |
3667 | } | |
3668 | ||
3669 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3670 | &cmd_ctx->creds, 0); |
a4b92340 | 3671 | |
b1d41407 DG |
3672 | free(uris); |
3673 | ||
00e2e675 DG |
3674 | break; |
3675 | } | |
5e16da05 MD |
3676 | case LTTNG_DESTROY_SESSION: |
3677 | { | |
2f77fc4b | 3678 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3679 | |
3680 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3681 | cmd_ctx->session = NULL; |
5461b305 | 3682 | break; |
5e16da05 | 3683 | } |
9f19cc17 | 3684 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3685 | { |
54d01ffb | 3686 | ssize_t nb_dom; |
fa64dfb4 | 3687 | struct lttng_domain *domains = NULL; |
5461b305 | 3688 | |
54d01ffb DG |
3689 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3690 | if (nb_dom < 0) { | |
f73fabfd | 3691 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3692 | ret = -nb_dom; |
3693 | goto error; | |
ce3d728c | 3694 | } |
520ff687 | 3695 | |
54d01ffb | 3696 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 | 3697 | if (ret < 0) { |
ae9c20bc | 3698 | free(domains); |
5461b305 | 3699 | goto setup_error; |
520ff687 | 3700 | } |
57167058 | 3701 | |
54d01ffb DG |
3702 | /* Copy event list into message payload */ |
3703 | memcpy(cmd_ctx->llm->payload, domains, | |
3704 | nb_dom * sizeof(struct lttng_domain)); | |
3705 | ||
3706 | free(domains); | |
5e16da05 | 3707 | |
f73fabfd | 3708 | ret = LTTNG_OK; |
5e16da05 MD |
3709 | break; |
3710 | } | |
9f19cc17 | 3711 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3712 | { |
6775595e | 3713 | int nb_chan; |
ade7ce52 | 3714 | struct lttng_channel *channels = NULL; |
54d01ffb | 3715 | |
b551a063 DG |
3716 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3717 | cmd_ctx->session, &channels); | |
54d01ffb | 3718 | if (nb_chan < 0) { |
f73fabfd | 3719 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3720 | ret = -nb_chan; |
3721 | goto error; | |
5461b305 | 3722 | } |
ca95a216 | 3723 | |
54d01ffb | 3724 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 | 3725 | if (ret < 0) { |
ae9c20bc | 3726 | free(channels); |
5461b305 DG |
3727 | goto setup_error; |
3728 | } | |
9f19cc17 | 3729 | |
54d01ffb DG |
3730 | /* Copy event list into message payload */ |
3731 | memcpy(cmd_ctx->llm->payload, channels, | |
3732 | nb_chan * sizeof(struct lttng_channel)); | |
3733 | ||
3734 | free(channels); | |
9f19cc17 | 3735 | |
f73fabfd | 3736 | ret = LTTNG_OK; |
5461b305 | 3737 | break; |
5e16da05 | 3738 | } |
9f19cc17 | 3739 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3740 | { |
b551a063 | 3741 | ssize_t nb_event; |
684d34d2 | 3742 | struct lttng_event *events = NULL; |
9f19cc17 | 3743 | |
b551a063 | 3744 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3745 | cmd_ctx->lsm->u.list.channel_name, &events); |
3746 | if (nb_event < 0) { | |
f73fabfd | 3747 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3748 | ret = -nb_event; |
3749 | goto error; | |
5461b305 | 3750 | } |
ca95a216 | 3751 | |
54d01ffb | 3752 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 | 3753 | if (ret < 0) { |
ae9c20bc | 3754 | free(events); |
5461b305 DG |
3755 | goto setup_error; |
3756 | } | |
9f19cc17 | 3757 | |
54d01ffb DG |
3758 | /* Copy event list into message payload */ |
3759 | memcpy(cmd_ctx->llm->payload, events, | |
3760 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3761 | |
54d01ffb | 3762 | free(events); |
9f19cc17 | 3763 | |
f73fabfd | 3764 | ret = LTTNG_OK; |
5461b305 | 3765 | break; |
5e16da05 MD |
3766 | } |
3767 | case LTTNG_LIST_SESSIONS: | |
3768 | { | |
8e0af1b4 | 3769 | unsigned int nr_sessions; |
5461b305 | 3770 | |
8e0af1b4 | 3771 | session_lock_list(); |
730389d9 DG |
3772 | nr_sessions = lttng_sessions_count( |
3773 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3774 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3775 | |
8e0af1b4 | 3776 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3777 | if (ret < 0) { |
54d01ffb | 3778 | session_unlock_list(); |
5461b305 | 3779 | goto setup_error; |
e065084a | 3780 | } |
5e16da05 | 3781 | |
6c9cc2ab | 3782 | /* Filled the session array */ |
2f77fc4b | 3783 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3784 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3785 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3786 | |
54d01ffb | 3787 | session_unlock_list(); |
5e16da05 | 3788 | |
f73fabfd | 3789 | ret = LTTNG_OK; |
5e16da05 MD |
3790 | break; |
3791 | } | |
d0254c7c MD |
3792 | case LTTNG_CALIBRATE: |
3793 | { | |
54d01ffb DG |
3794 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3795 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3796 | break; |
3797 | } | |
d9800920 DG |
3798 | case LTTNG_REGISTER_CONSUMER: |
3799 | { | |
2f77fc4b DG |
3800 | struct consumer_data *cdata; |
3801 | ||
3802 | switch (cmd_ctx->lsm->domain.type) { | |
3803 | case LTTNG_DOMAIN_KERNEL: | |
3804 | cdata = &kconsumer_data; | |
3805 | break; | |
3806 | default: | |
f73fabfd | 3807 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3808 | goto error; |
3809 | } | |
3810 | ||
54d01ffb | 3811 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3812 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3813 | break; |
3814 | } | |
6d805429 | 3815 | case LTTNG_DATA_PENDING: |
806e2684 | 3816 | { |
6d805429 | 3817 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
3818 | break; |
3819 | } | |
da3c9ec1 DG |
3820 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3821 | { | |
6dc3064a DG |
3822 | struct lttcomm_lttng_output_id reply; |
3823 | ||
3824 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3825 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3826 | if (ret != LTTNG_OK) { | |
3827 | goto error; | |
3828 | } | |
3829 | ||
3830 | ret = setup_lttng_msg(cmd_ctx, sizeof(reply)); | |
3831 | if (ret < 0) { | |
3832 | goto setup_error; | |
3833 | } | |
3834 | ||
3835 | /* Copy output list into message payload */ | |
3836 | memcpy(cmd_ctx->llm->payload, &reply, sizeof(reply)); | |
3837 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3838 | break; |
3839 | } | |
3840 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3841 | { | |
6dc3064a DG |
3842 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3843 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3844 | break; |
3845 | } | |
3846 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3847 | { | |
6dc3064a DG |
3848 | ssize_t nb_output; |
3849 | struct lttng_snapshot_output *outputs = NULL; | |
3850 | ||
3851 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
3852 | if (nb_output < 0) { | |
3853 | ret = -nb_output; | |
3854 | goto error; | |
3855 | } | |
3856 | ||
3857 | ret = setup_lttng_msg(cmd_ctx, | |
3858 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3859 | if (ret < 0) { | |
3860 | free(outputs); | |
3861 | goto setup_error; | |
3862 | } | |
3863 | ||
3864 | if (outputs) { | |
3865 | /* Copy output list into message payload */ | |
3866 | memcpy(cmd_ctx->llm->payload, outputs, | |
3867 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3868 | free(outputs); | |
3869 | } | |
3870 | ||
3871 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3872 | break; |
3873 | } | |
3874 | case LTTNG_SNAPSHOT_RECORD: | |
3875 | { | |
6dc3064a DG |
3876 | ret = cmd_snapshot_record(cmd_ctx->session, |
3877 | &cmd_ctx->lsm->u.snapshot_record.output, | |
3878 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
3879 | break; |
3880 | } | |
27babd3a DG |
3881 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
3882 | { | |
3883 | size_t nb_uri, len; | |
3884 | struct lttng_uri *uris = NULL; | |
3885 | ||
3886 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3887 | len = nb_uri * sizeof(struct lttng_uri); | |
3888 | ||
3889 | if (nb_uri > 0) { | |
3890 | uris = zmalloc(len); | |
3891 | if (uris == NULL) { | |
3892 | ret = LTTNG_ERR_FATAL; | |
3893 | goto error; | |
3894 | } | |
3895 | ||
3896 | /* Receive variable len data */ | |
3897 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3898 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3899 | if (ret <= 0) { | |
3900 | DBG("No URIs received from client... continuing"); | |
3901 | *sock_error = 1; | |
3902 | ret = LTTNG_ERR_SESSION_FAIL; | |
3903 | free(uris); | |
3904 | goto error; | |
3905 | } | |
3906 | ||
3907 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3908 | DBG("Creating session with ONE network URI is a bad call"); | |
3909 | ret = LTTNG_ERR_SESSION_FAIL; | |
3910 | free(uris); | |
3911 | goto error; | |
3912 | } | |
3913 | } | |
3914 | ||
3915 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
3916 | nb_uri, &cmd_ctx->creds); | |
3917 | free(uris); | |
3918 | break; | |
3919 | } | |
ecc48a90 JD |
3920 | case LTTNG_CREATE_SESSION_LIVE: |
3921 | { | |
3922 | size_t nb_uri, len; | |
3923 | struct lttng_uri *uris = NULL; | |
3924 | ||
3925 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3926 | len = nb_uri * sizeof(struct lttng_uri); | |
3927 | ||
3928 | if (nb_uri > 0) { | |
3929 | uris = zmalloc(len); | |
3930 | if (uris == NULL) { | |
3931 | ret = LTTNG_ERR_FATAL; | |
3932 | goto error; | |
3933 | } | |
3934 | ||
3935 | /* Receive variable len data */ | |
3936 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3937 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3938 | if (ret <= 0) { | |
3939 | DBG("No URIs received from client... continuing"); | |
3940 | *sock_error = 1; | |
3941 | ret = LTTNG_ERR_SESSION_FAIL; | |
3942 | free(uris); | |
3943 | goto error; | |
3944 | } | |
3945 | ||
3946 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3947 | DBG("Creating session with ONE network URI is a bad call"); | |
3948 | ret = LTTNG_ERR_SESSION_FAIL; | |
3949 | free(uris); | |
3950 | goto error; | |
3951 | } | |
3952 | } | |
3953 | ||
3954 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
3955 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
3956 | free(uris); | |
3957 | break; | |
3958 | } | |
fb198a11 JG |
3959 | case LTTNG_SAVE_SESSION: |
3960 | { | |
3961 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
3962 | &cmd_ctx->creds); | |
3963 | break; | |
3964 | } | |
d7ba1388 MD |
3965 | case LTTNG_SET_SESSION_SHM_PATH: |
3966 | { | |
3967 | ret = cmd_set_session_shm_path(cmd_ctx->session, | |
3968 | cmd_ctx->lsm->u.set_shm_path.shm_path); | |
3969 | break; | |
3970 | } | |
5e16da05 | 3971 | default: |
f73fabfd | 3972 | ret = LTTNG_ERR_UND; |
5461b305 | 3973 | break; |
fac6795d DG |
3974 | } |
3975 | ||
5461b305 | 3976 | error: |
5461b305 DG |
3977 | if (cmd_ctx->llm == NULL) { |
3978 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3979 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3980 | goto setup_error; |
3981 | } | |
3982 | } | |
54d01ffb | 3983 | /* Set return code */ |
5461b305 | 3984 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3985 | setup_error: |
b5541356 | 3986 | if (cmd_ctx->session) { |
54d01ffb | 3987 | session_unlock(cmd_ctx->session); |
b5541356 | 3988 | } |
256a5576 MD |
3989 | if (need_tracing_session) { |
3990 | session_unlock_list(); | |
3991 | } | |
54d01ffb | 3992 | init_setup_error: |
8028d920 | 3993 | return ret; |
fac6795d DG |
3994 | } |
3995 | ||
44a5e5eb DG |
3996 | /* |
3997 | * Thread managing health check socket. | |
3998 | */ | |
3999 | static void *thread_manage_health(void *data) | |
4000 | { | |
eb4a2943 | 4001 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
4002 | uint32_t revents, nb_fd; |
4003 | struct lttng_poll_event events; | |
0c89d795 MD |
4004 | struct health_comm_msg msg; |
4005 | struct health_comm_reply reply; | |
44a5e5eb DG |
4006 | |
4007 | DBG("[thread] Manage health check started"); | |
4008 | ||
4009 | rcu_register_thread(); | |
4010 | ||
6d737ce4 DG |
4011 | /* We might hit an error path before this is created. */ |
4012 | lttng_poll_init(&events); | |
3cc04881 | 4013 | |
44a5e5eb DG |
4014 | /* Create unix socket */ |
4015 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
4016 | if (sock < 0) { | |
4017 | ERR("Unable to create health check Unix socket"); | |
4018 | ret = -1; | |
4019 | goto error; | |
4020 | } | |
4021 | ||
6c71277b MD |
4022 | if (is_root) { |
4023 | /* lttng health client socket path permissions */ | |
4024 | ret = chown(health_unix_sock_path, 0, | |
4025 | utils_get_group_id(tracing_group_name)); | |
4026 | if (ret < 0) { | |
4027 | ERR("Unable to set group on %s", health_unix_sock_path); | |
4028 | PERROR("chown"); | |
4029 | ret = -1; | |
4030 | goto error; | |
4031 | } | |
4032 | ||
4033 | ret = chmod(health_unix_sock_path, | |
4034 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4035 | if (ret < 0) { | |
4036 | ERR("Unable to set permissions on %s", health_unix_sock_path); | |
4037 | PERROR("chmod"); | |
4038 | ret = -1; | |
4039 | goto error; | |
4040 | } | |
4041 | } | |
4042 | ||
b662582b DG |
4043 | /* |
4044 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4045 | * show must go on. | |
4046 | */ | |
4047 | (void) utils_set_fd_cloexec(sock); | |
4048 | ||
44a5e5eb DG |
4049 | ret = lttcomm_listen_unix_sock(sock); |
4050 | if (ret < 0) { | |
4051 | goto error; | |
4052 | } | |
4053 | ||
4054 | /* | |
4055 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4056 | * more will be added to this poll set. | |
4057 | */ | |
d0b96690 | 4058 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
4059 | if (ret < 0) { |
4060 | goto error; | |
4061 | } | |
4062 | ||
4063 | /* Add the application registration socket */ | |
4064 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
4065 | if (ret < 0) { | |
4066 | goto error; | |
4067 | } | |
4068 | ||
ef367a93 | 4069 | sessiond_notify_ready(); |
97bc1426 | 4070 | |
44a5e5eb DG |
4071 | while (1) { |
4072 | DBG("Health check ready"); | |
4073 | ||
44a5e5eb DG |
4074 | /* Inifinite blocking call, waiting for transmission */ |
4075 | restart: | |
4076 | ret = lttng_poll_wait(&events, -1); | |
4077 | if (ret < 0) { | |
4078 | /* | |
4079 | * Restart interrupted system call. | |
4080 | */ | |
4081 | if (errno == EINTR) { | |
4082 | goto restart; | |
4083 | } | |
4084 | goto error; | |
4085 | } | |
4086 | ||
0d9c5d77 DG |
4087 | nb_fd = ret; |
4088 | ||
44a5e5eb DG |
4089 | for (i = 0; i < nb_fd; i++) { |
4090 | /* Fetch once the poll data */ | |
4091 | revents = LTTNG_POLL_GETEV(&events, i); | |
4092 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4093 | ||
fd20dac9 MD |
4094 | if (!revents) { |
4095 | /* No activity for this FD (poll implementation). */ | |
4096 | continue; | |
4097 | } | |
4098 | ||
44a5e5eb | 4099 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4100 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 4101 | if (ret) { |
139ac872 MD |
4102 | err = 0; |
4103 | goto exit; | |
44a5e5eb DG |
4104 | } |
4105 | ||
4106 | /* Event on the registration socket */ | |
4107 | if (pollfd == sock) { | |
4108 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
4109 | ERR("Health socket poll error"); | |
4110 | goto error; | |
4111 | } | |
4112 | } | |
4113 | } | |
4114 | ||
4115 | new_sock = lttcomm_accept_unix_sock(sock); | |
4116 | if (new_sock < 0) { | |
4117 | goto error; | |
4118 | } | |
4119 | ||
b662582b DG |
4120 | /* |
4121 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4122 | * show must go on. | |
4123 | */ | |
4124 | (void) utils_set_fd_cloexec(new_sock); | |
4125 | ||
44a5e5eb DG |
4126 | DBG("Receiving data from client for health..."); |
4127 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
4128 | if (ret <= 0) { | |
4129 | DBG("Nothing recv() from client... continuing"); | |
4130 | ret = close(new_sock); | |
4131 | if (ret) { | |
4132 | PERROR("close"); | |
4133 | } | |
4134 | new_sock = -1; | |
4135 | continue; | |
4136 | } | |
4137 | ||
4138 | rcu_thread_online(); | |
4139 | ||
53efb85a | 4140 | memset(&reply, 0, sizeof(reply)); |
6c71277b MD |
4141 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { |
4142 | /* | |
4143 | * health_check_state returns 0 if health is | |
4144 | * bad. | |
4145 | */ | |
4146 | if (!health_check_state(health_sessiond, i)) { | |
4147 | reply.ret_code |= 1ULL << i; | |
4148 | } | |
44a5e5eb DG |
4149 | } |
4150 | ||
6c71277b | 4151 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
4152 | |
4153 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
4154 | if (ret < 0) { | |
4155 | ERR("Failed to send health data back to client"); | |
4156 | } | |
4157 | ||
4158 | /* End of transmission */ | |
4159 | ret = close(new_sock); | |
4160 | if (ret) { | |
4161 | PERROR("close"); | |
4162 | } | |
4163 | new_sock = -1; | |
4164 | } | |
4165 | ||
139ac872 | 4166 | exit: |
44a5e5eb | 4167 | error: |
139ac872 MD |
4168 | if (err) { |
4169 | ERR("Health error occurred in %s", __func__); | |
4170 | } | |
44a5e5eb DG |
4171 | DBG("Health check thread dying"); |
4172 | unlink(health_unix_sock_path); | |
4173 | if (sock >= 0) { | |
4174 | ret = close(sock); | |
4175 | if (ret) { | |
4176 | PERROR("close"); | |
4177 | } | |
4178 | } | |
44a5e5eb DG |
4179 | |
4180 | lttng_poll_clean(&events); | |
4181 | ||
4182 | rcu_unregister_thread(); | |
4183 | return NULL; | |
4184 | } | |
4185 | ||
1d4b027a | 4186 | /* |
d063d709 DG |
4187 | * This thread manage all clients request using the unix client socket for |
4188 | * communication. | |
1d4b027a DG |
4189 | */ |
4190 | static void *thread_manage_clients(void *data) | |
4191 | { | |
139ac872 | 4192 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 4193 | int sock_error; |
5eb91c98 | 4194 | uint32_t revents, nb_fd; |
273ea72c | 4195 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 4196 | struct lttng_poll_event events; |
1d4b027a DG |
4197 | |
4198 | DBG("[thread] Manage client started"); | |
4199 | ||
f6a9efaa DG |
4200 | rcu_register_thread(); |
4201 | ||
6c71277b | 4202 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 4203 | |
840cb59c | 4204 | health_code_update(); |
44a5e5eb | 4205 | |
1d4b027a DG |
4206 | ret = lttcomm_listen_unix_sock(client_sock); |
4207 | if (ret < 0) { | |
35df2755 | 4208 | goto error_listen; |
1d4b027a DG |
4209 | } |
4210 | ||
5eb91c98 DG |
4211 | /* |
4212 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4213 | * more will be added to this poll set. | |
4214 | */ | |
d0b96690 | 4215 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 4216 | if (ret < 0) { |
35df2755 | 4217 | goto error_create_poll; |
5eb91c98 | 4218 | } |
273ea72c | 4219 | |
5eb91c98 DG |
4220 | /* Add the application registration socket */ |
4221 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
4222 | if (ret < 0) { | |
4223 | goto error; | |
4224 | } | |
273ea72c | 4225 | |
ef367a93 JG |
4226 | sessiond_notify_ready(); |
4227 | ret = sem_post(&load_info->message_thread_ready); | |
4228 | if (ret) { | |
4229 | PERROR("sem_post message_thread_ready"); | |
4230 | goto error; | |
4231 | } | |
0bb7724a | 4232 | |
72453c8c MD |
4233 | /* This testpoint is after we signal readiness to the parent. */ |
4234 | if (testpoint(sessiond_thread_manage_clients)) { | |
4235 | goto error; | |
4236 | } | |
4237 | ||
e547b070 | 4238 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
4239 | goto error; |
4240 | } | |
8ac94142 | 4241 | |
840cb59c | 4242 | health_code_update(); |
44a5e5eb | 4243 | |
1d4b027a | 4244 | while (1) { |
1d4b027a | 4245 | DBG("Accepting client command ..."); |
273ea72c DG |
4246 | |
4247 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 4248 | restart: |
a78af745 | 4249 | health_poll_entry(); |
5eb91c98 | 4250 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 4251 | health_poll_exit(); |
273ea72c | 4252 | if (ret < 0) { |
88f2b785 MD |
4253 | /* |
4254 | * Restart interrupted system call. | |
4255 | */ | |
4256 | if (errno == EINTR) { | |
4257 | goto restart; | |
4258 | } | |
273ea72c DG |
4259 | goto error; |
4260 | } | |
4261 | ||
0d9c5d77 DG |
4262 | nb_fd = ret; |
4263 | ||
5eb91c98 DG |
4264 | for (i = 0; i < nb_fd; i++) { |
4265 | /* Fetch once the poll data */ | |
4266 | revents = LTTNG_POLL_GETEV(&events, i); | |
4267 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4268 | ||
840cb59c | 4269 | health_code_update(); |
44a5e5eb | 4270 | |
fd20dac9 MD |
4271 | if (!revents) { |
4272 | /* No activity for this FD (poll implementation). */ | |
4273 | continue; | |
4274 | } | |
4275 | ||
5eb91c98 | 4276 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4277 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 4278 | if (ret) { |
139ac872 MD |
4279 | err = 0; |
4280 | goto exit; | |
5eb91c98 DG |
4281 | } |
4282 | ||
4283 | /* Event on the registration socket */ | |
4284 | if (pollfd == client_sock) { | |
4285 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
4286 | ERR("Client socket poll error"); | |
4287 | goto error; | |
4288 | } | |
4289 | } | |
4290 | } | |
4291 | ||
4292 | DBG("Wait for client response"); | |
4293 | ||
840cb59c | 4294 | health_code_update(); |
44a5e5eb | 4295 | |
5eb91c98 DG |
4296 | sock = lttcomm_accept_unix_sock(client_sock); |
4297 | if (sock < 0) { | |
273ea72c | 4298 | goto error; |
273ea72c DG |
4299 | } |
4300 | ||
b662582b DG |
4301 | /* |
4302 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4303 | * show must go on. | |
4304 | */ | |
4305 | (void) utils_set_fd_cloexec(sock); | |
4306 | ||
be040666 DG |
4307 | /* Set socket option for credentials retrieval */ |
4308 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
4309 | if (ret < 0) { | |
4310 | goto error; | |
4311 | } | |
4312 | ||
5eb91c98 | 4313 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 4314 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 4315 | if (cmd_ctx == NULL) { |
76d7553f | 4316 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 4317 | goto error; |
5eb91c98 | 4318 | } |
1d4b027a | 4319 | |
5eb91c98 | 4320 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 4321 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 4322 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 4323 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
4324 | goto error; |
4325 | } | |
1d4b027a | 4326 | |
5eb91c98 DG |
4327 | cmd_ctx->llm = NULL; |
4328 | cmd_ctx->session = NULL; | |
1d4b027a | 4329 | |
840cb59c | 4330 | health_code_update(); |
44a5e5eb | 4331 | |
5eb91c98 DG |
4332 | /* |
4333 | * Data is received from the lttng client. The struct | |
4334 | * lttcomm_session_msg (lsm) contains the command and data request of | |
4335 | * the client. | |
4336 | */ | |
4337 | DBG("Receiving data from client ..."); | |
be040666 DG |
4338 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
4339 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
4340 | if (ret <= 0) { |
4341 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
4342 | ret = close(sock); |
4343 | if (ret) { | |
4344 | PERROR("close"); | |
4345 | } | |
4346 | sock = -1; | |
a2c0da86 | 4347 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4348 | continue; |
4349 | } | |
1d4b027a | 4350 | |
840cb59c | 4351 | health_code_update(); |
44a5e5eb | 4352 | |
5eb91c98 DG |
4353 | // TODO: Validate cmd_ctx including sanity check for |
4354 | // security purpose. | |
f7776ea7 | 4355 | |
f6a9efaa | 4356 | rcu_thread_online(); |
5eb91c98 DG |
4357 | /* |
4358 | * This function dispatch the work to the kernel or userspace tracer | |
4359 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
4360 | * informations for the client. The command context struct contains | |
4361 | * everything this function may needs. | |
4362 | */ | |
53a80697 | 4363 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 4364 | rcu_thread_offline(); |
5eb91c98 | 4365 | if (ret < 0) { |
36134aa1 DG |
4366 | ret = close(sock); |
4367 | if (ret) { | |
4368 | PERROR("close"); | |
53a80697 | 4369 | } |
36134aa1 | 4370 | sock = -1; |
bbd973c2 | 4371 | /* |
5eb91c98 | 4372 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 4373 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
4374 | * (ENOMEM). Error detected but still accept |
4375 | * command, unless a socket error has been | |
4376 | * detected. | |
bbd973c2 | 4377 | */ |
bbd973c2 | 4378 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4379 | continue; |
4380 | } | |
d6e4fca4 | 4381 | |
840cb59c | 4382 | health_code_update(); |
44a5e5eb | 4383 | |
54d01ffb DG |
4384 | DBG("Sending response (size: %d, retcode: %s)", |
4385 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 4386 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 4387 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
4388 | if (ret < 0) { |
4389 | ERR("Failed to send data back to client"); | |
bbd973c2 | 4390 | } |
1d4b027a | 4391 | |
5eb91c98 | 4392 | /* End of transmission */ |
76d7553f MD |
4393 | ret = close(sock); |
4394 | if (ret) { | |
4395 | PERROR("close"); | |
4396 | } | |
4397 | sock = -1; | |
be040666 DG |
4398 | |
4399 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 4400 | |
840cb59c | 4401 | health_code_update(); |
273ea72c DG |
4402 | } |
4403 | ||
139ac872 | 4404 | exit: |
5eb91c98 | 4405 | error: |
35df2755 CB |
4406 | if (sock >= 0) { |
4407 | ret = close(sock); | |
4408 | if (ret) { | |
4409 | PERROR("close"); | |
4410 | } | |
139ac872 | 4411 | } |
44a5e5eb | 4412 | |
35df2755 CB |
4413 | lttng_poll_clean(&events); |
4414 | clean_command_ctx(&cmd_ctx); | |
4415 | ||
4416 | error_listen: | |
4417 | error_create_poll: | |
273ea72c | 4418 | unlink(client_unix_sock_path); |
76d7553f MD |
4419 | if (client_sock >= 0) { |
4420 | ret = close(client_sock); | |
4421 | if (ret) { | |
4422 | PERROR("close"); | |
4423 | } | |
a4b35e07 | 4424 | } |
35df2755 CB |
4425 | |
4426 | if (err) { | |
840cb59c | 4427 | health_error(); |
35df2755 | 4428 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4429 | } |
273ea72c | 4430 | |
8782cc74 | 4431 | health_unregister(health_sessiond); |
35df2755 CB |
4432 | |
4433 | DBG("Client thread dying"); | |
f6a9efaa DG |
4434 | |
4435 | rcu_unregister_thread(); | |
4a15001e MD |
4436 | |
4437 | /* | |
4438 | * Since we are creating the consumer threads, we own them, so we need | |
4439 | * to join them before our thread exits. | |
4440 | */ | |
4441 | ret = join_consumer_thread(&kconsumer_data); | |
4442 | if (ret) { | |
4443 | errno = ret; | |
4444 | PERROR("join_consumer"); | |
4445 | } | |
4446 | ||
4447 | ret = join_consumer_thread(&ustconsumer32_data); | |
4448 | if (ret) { | |
4449 | errno = ret; | |
4450 | PERROR("join_consumer ust32"); | |
4451 | } | |
4452 | ||
4453 | ret = join_consumer_thread(&ustconsumer64_data); | |
4454 | if (ret) { | |
4455 | errno = ret; | |
4456 | PERROR("join_consumer ust64"); | |
4457 | } | |
1d4b027a DG |
4458 | return NULL; |
4459 | } | |
4460 | ||
4461 | ||
fac6795d DG |
4462 | /* |
4463 | * usage function on stderr | |
4464 | */ | |
4465 | static void usage(void) | |
4466 | { | |
b716ce68 | 4467 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
4468 | fprintf(stderr, " -h, --help Display this usage.\n"); |
4469 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
4470 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
4471 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
4472 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
4473 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
4474 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
4475 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
4476 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
4477 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
4478 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
4479 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
4480 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 | 4481 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
72dd7491 | 4482 | fprintf(stderr, " -b, --background Start as a daemon, keeping console open.\n"); |
d6f42150 DG |
4483 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); |
4484 | fprintf(stderr, " -V, --version Show version number.\n"); | |
7fe6d2c5 | 4485 | fprintf(stderr, " -S, --sig-parent Send SIGUSR1 to parent pid to notify readiness.\n"); |
d6f42150 DG |
4486 | fprintf(stderr, " -q, --quiet No output at all.\n"); |
4487 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
35f90c40 | 4488 | fprintf(stderr, " -p, --pidfile FILE Write a pid to FILE name overriding the default value.\n"); |
3bd1e081 | 4489 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 4490 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
1b2ef7fe | 4491 | fprintf(stderr, " --agent-tcp-port Agent registration TCP port\n"); |
76d01ebb | 4492 | fprintf(stderr, " -f --config PATH Load daemon configuration file\n"); |
ef367a93 | 4493 | fprintf(stderr, " -l --load PATH Load session configuration\n"); |
fbb9748b | 4494 | fprintf(stderr, " --kmod-probes Specify kernel module probes to load\n"); |
c9d42407 | 4495 | fprintf(stderr, " --extra-kmod-probes Specify extra kernel module probes to load\n"); |
fac6795d DG |
4496 | } |
4497 | ||
0a17a3a0 JG |
4498 | static int string_match(const char *str1, const char *str2) |
4499 | { | |
4500 | return (str1 && str2) && !strcmp(str1, str2); | |
4501 | } | |
4502 | ||
fac6795d | 4503 | /* |
26296c48 JG |
4504 | * Take an option from the getopt output and set it in the right variable to be |
4505 | * used later. | |
4506 | * | |
4507 | * Return 0 on success else a negative value. | |
fac6795d | 4508 | */ |
26296c48 | 4509 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4510 | { |
26296c48 | 4511 | int ret = 0; |
fac6795d | 4512 | |
c5d350b2 JG |
4513 | if (arg && arg[0] == '\0') { |
4514 | /* | |
4515 | * This only happens if the value is read from daemon config | |
4516 | * file. This means the option requires an argument and the | |
4517 | * configuration file contains a line such as: | |
4518 | * my_option = | |
4519 | */ | |
4520 | ret = -EINVAL; | |
4521 | goto end; | |
4522 | } | |
4523 | ||
0a17a3a0 | 4524 | if (string_match(optname, "client-sock") || opt == 'c') { |
e8fa9fb0 MD |
4525 | if (lttng_is_setuid_setgid()) { |
4526 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4527 | "-c, --client-sock"); | |
4528 | } else { | |
4529 | snprintf(client_unix_sock_path, PATH_MAX, "%s", arg); | |
4530 | } | |
0a17a3a0 | 4531 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
e8fa9fb0 MD |
4532 | if (lttng_is_setuid_setgid()) { |
4533 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4534 | "-a, --apps-sock"); | |
4535 | } else { | |
4536 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", arg); | |
4537 | } | |
0a17a3a0 | 4538 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
26296c48 | 4539 | opt_daemon = 1; |
0a17a3a0 | 4540 | } else if (string_match(optname, "background") || opt == 'b') { |
72dd7491 | 4541 | opt_background = 1; |
0a17a3a0 | 4542 | } else if (string_match(optname, "group") || opt == 'g') { |
e8fa9fb0 MD |
4543 | if (lttng_is_setuid_setgid()) { |
4544 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4545 | "-g, --group"); | |
4546 | } else { | |
4547 | /* | |
4548 | * If the override option is set, the pointer points to a | |
4549 | * *non* const thus freeing it even though the variable type is | |
4550 | * set to const. | |
4551 | */ | |
4552 | if (tracing_group_name_override) { | |
4553 | free((void *) tracing_group_name); | |
4554 | } | |
4555 | tracing_group_name = strdup(arg); | |
4556 | if (!tracing_group_name) { | |
4557 | PERROR("strdup"); | |
4558 | ret = -ENOMEM; | |
4559 | } | |
4560 | tracing_group_name_override = 1; | |
db322c4d | 4561 | } |
0a17a3a0 | 4562 | } else if (string_match(optname, "help") || opt == 'h') { |
26296c48 | 4563 | usage(); |
4a15001e | 4564 | exit(EXIT_SUCCESS); |
0a17a3a0 | 4565 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
4566 | fprintf(stdout, "%s\n", VERSION); |
4567 | exit(EXIT_SUCCESS); | |
0a17a3a0 | 4568 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
26296c48 | 4569 | opt_sig_parent = 1; |
0a17a3a0 | 4570 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
e8fa9fb0 MD |
4571 | if (lttng_is_setuid_setgid()) { |
4572 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4573 | "--kconsumerd-err-sock"); | |
4574 | } else { | |
4575 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4576 | } | |
0a17a3a0 | 4577 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
e8fa9fb0 MD |
4578 | if (lttng_is_setuid_setgid()) { |
4579 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4580 | "--kconsumerd-cmd-sock"); | |
4581 | } else { | |
4582 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4583 | } | |
0a17a3a0 | 4584 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
e8fa9fb0 MD |
4585 | if (lttng_is_setuid_setgid()) { |
4586 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4587 | "--ustconsumerd64-err-sock"); | |
4588 | } else { | |
4589 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4590 | } | |
0a17a3a0 | 4591 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
e8fa9fb0 MD |
4592 | if (lttng_is_setuid_setgid()) { |
4593 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4594 | "--ustconsumerd64-cmd-sock"); | |
4595 | } else { | |
4596 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4597 | } | |
0a17a3a0 | 4598 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
e8fa9fb0 MD |
4599 | if (lttng_is_setuid_setgid()) { |
4600 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4601 | "--ustconsumerd32-err-sock"); | |
4602 | } else { | |
4603 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4604 | } | |
0a17a3a0 | 4605 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
e8fa9fb0 MD |
4606 | if (lttng_is_setuid_setgid()) { |
4607 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4608 | "--ustconsumerd32-cmd-sock"); | |
4609 | } else { | |
4610 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4611 | } | |
0a17a3a0 | 4612 | } else if (string_match(optname, "no-kernel")) { |
26296c48 | 4613 | opt_no_kernel = 1; |
0a17a3a0 | 4614 | } else if (string_match(optname, "quiet") || opt == 'q') { |
26296c48 | 4615 | lttng_opt_quiet = 1; |
0a17a3a0 | 4616 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
4617 | /* Verbose level can increase using multiple -v */ |
4618 | if (arg) { | |
13755a18 | 4619 | /* Value obtained from config file */ |
26296c48 JG |
4620 | lttng_opt_verbose = config_parse_value(arg); |
4621 | } else { | |
13755a18 JG |
4622 | /* -v used on command line */ |
4623 | lttng_opt_verbose++; | |
26296c48 | 4624 | } |
13755a18 JG |
4625 | /* Clamp value to [0, 3] */ |
4626 | lttng_opt_verbose = lttng_opt_verbose < 0 ? 0 : | |
4627 | (lttng_opt_verbose <= 3 ? lttng_opt_verbose : 3); | |
0a17a3a0 | 4628 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 JG |
4629 | if (arg) { |
4630 | opt_verbose_consumer = config_parse_value(arg); | |
4631 | } else { | |
3bd1e081 | 4632 | opt_verbose_consumer += 1; |
26296c48 | 4633 | } |
0a17a3a0 | 4634 | } else if (string_match(optname, "consumerd32-path")) { |
e8fa9fb0 MD |
4635 | if (lttng_is_setuid_setgid()) { |
4636 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4637 | "--consumerd32-path"); | |
4638 | } else { | |
4639 | if (consumerd32_bin_override) { | |
4640 | free((void *) consumerd32_bin); | |
4641 | } | |
4642 | consumerd32_bin = strdup(arg); | |
4643 | if (!consumerd32_bin) { | |
4644 | PERROR("strdup"); | |
4645 | ret = -ENOMEM; | |
4646 | } | |
4647 | consumerd32_bin_override = 1; | |
db322c4d | 4648 | } |
0a17a3a0 | 4649 | } else if (string_match(optname, "consumerd32-libdir")) { |
e8fa9fb0 MD |
4650 | if (lttng_is_setuid_setgid()) { |
4651 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4652 | "--consumerd32-libdir"); | |
4653 | } else { | |
4654 | if (consumerd32_libdir_override) { | |
4655 | free((void *) consumerd32_libdir); | |
4656 | } | |
4657 | consumerd32_libdir = strdup(arg); | |
4658 | if (!consumerd32_libdir) { | |
4659 | PERROR("strdup"); | |
4660 | ret = -ENOMEM; | |
4661 | } | |
4662 | consumerd32_libdir_override = 1; | |
db322c4d | 4663 | } |
0a17a3a0 | 4664 | } else if (string_match(optname, "consumerd64-path")) { |
e8fa9fb0 MD |
4665 | if (lttng_is_setuid_setgid()) { |
4666 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4667 | "--consumerd64-path"); | |
4668 | } else { | |
4669 | if (consumerd64_bin_override) { | |
4670 | free((void *) consumerd64_bin); | |
4671 | } | |
4672 | consumerd64_bin = strdup(arg); | |
4673 | if (!consumerd64_bin) { | |
4674 | PERROR("strdup"); | |
4675 | ret = -ENOMEM; | |
4676 | } | |
4677 | consumerd64_bin_override = 1; | |
db322c4d | 4678 | } |
0a17a3a0 | 4679 | } else if (string_match(optname, "consumerd64-libdir")) { |
e8fa9fb0 MD |
4680 | if (lttng_is_setuid_setgid()) { |
4681 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4682 | "--consumerd64-libdir"); | |
4683 | } else { | |
4684 | if (consumerd64_libdir_override) { | |
4685 | free((void *) consumerd64_libdir); | |
4686 | } | |
4687 | consumerd64_libdir = strdup(arg); | |
4688 | if (!consumerd64_libdir) { | |
4689 | PERROR("strdup"); | |
4690 | ret = -ENOMEM; | |
4691 | } | |
4692 | consumerd64_libdir_override = 1; | |
db322c4d | 4693 | } |
0a17a3a0 | 4694 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
e8fa9fb0 MD |
4695 | if (lttng_is_setuid_setgid()) { |
4696 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4697 | "-p, --pidfile"); | |
4698 | } else { | |
4699 | free(opt_pidfile); | |
4700 | opt_pidfile = strdup(arg); | |
4701 | if (!opt_pidfile) { | |
4702 | PERROR("strdup"); | |
4703 | ret = -ENOMEM; | |
4704 | } | |
db322c4d | 4705 | } |
0a17a3a0 | 4706 | } else if (string_match(optname, "agent-tcp-port")) { |
e8fa9fb0 MD |
4707 | if (lttng_is_setuid_setgid()) { |
4708 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4709 | "--agent-tcp-port"); | |
4710 | } else { | |
4711 | unsigned long v; | |
4d076222 | 4712 | |
e04aa23e JG |
4713 | if (!arg) { |
4714 | ret = -EINVAL; | |
4715 | goto end; | |
4716 | } | |
e8fa9fb0 MD |
4717 | errno = 0; |
4718 | v = strtoul(arg, NULL, 0); | |
4719 | if (errno != 0 || !isdigit(arg[0])) { | |
4720 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
4721 | return -1; | |
4722 | } | |
4723 | if (v == 0 || v >= 65535) { | |
4724 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
4725 | return -1; | |
4726 | } | |
4727 | agent_tcp_port = (uint32_t) v; | |
4728 | DBG3("Agent TCP port set to non default: %u", agent_tcp_port); | |
26296c48 | 4729 | } |
0a17a3a0 | 4730 | } else if (string_match(optname, "load") || opt == 'l') { |
e8fa9fb0 MD |
4731 | if (lttng_is_setuid_setgid()) { |
4732 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4733 | "-l, --load"); | |
4734 | } else { | |
4735 | free(opt_load_session_path); | |
4736 | opt_load_session_path = strdup(arg); | |
4737 | if (!opt_load_session_path) { | |
4738 | PERROR("strdup"); | |
4739 | ret = -ENOMEM; | |
4740 | } | |
ef367a93 | 4741 | } |
0a17a3a0 | 4742 | } else if (string_match(optname, "kmod-probes")) { |
e8fa9fb0 MD |
4743 | if (lttng_is_setuid_setgid()) { |
4744 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4745 | "--kmod-probes"); | |
4746 | } else { | |
4747 | free(kmod_probes_list); | |
4748 | kmod_probes_list = strdup(arg); | |
4749 | if (!kmod_probes_list) { | |
4750 | PERROR("strdup"); | |
4751 | ret = -ENOMEM; | |
4752 | } | |
c9d42407 | 4753 | } |
0a17a3a0 | 4754 | } else if (string_match(optname, "extra-kmod-probes")) { |
e8fa9fb0 MD |
4755 | if (lttng_is_setuid_setgid()) { |
4756 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4757 | "--extra-kmod-probes"); | |
4758 | } else { | |
4759 | free(kmod_extra_probes_list); | |
4760 | kmod_extra_probes_list = strdup(arg); | |
4761 | if (!kmod_extra_probes_list) { | |
4762 | PERROR("strdup"); | |
4763 | ret = -ENOMEM; | |
4764 | } | |
db322c4d | 4765 | } |
0a17a3a0 JG |
4766 | } else if (string_match(optname, "config") || opt == 'f') { |
4767 | /* This is handled in set_options() thus silent skip. */ | |
4768 | goto end; | |
4769 | } else { | |
26296c48 JG |
4770 | /* Unknown option or other error. |
4771 | * Error is printed by getopt, just return */ | |
4772 | ret = -1; | |
4773 | } | |
4774 | ||
f3dd7ce7 | 4775 | end: |
c5d350b2 JG |
4776 | if (ret == -EINVAL) { |
4777 | const char *opt_name = "unknown"; | |
4778 | int i; | |
4779 | ||
4780 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
4781 | i++) { | |
4782 | if (opt == long_options[i].val) { | |
4783 | opt_name = long_options[i].name; | |
4784 | break; | |
4785 | } | |
4786 | } | |
4787 | ||
4788 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
4789 | opt_name); | |
4790 | } | |
f3dd7ce7 | 4791 | |
26296c48 JG |
4792 | return ret; |
4793 | } | |
4794 | ||
4795 | /* | |
4796 | * config_entry_handler_cb used to handle options read from a config file. | |
4797 | * See config_entry_handler_cb comment in common/config/config.h for the | |
4798 | * return value conventions. | |
4799 | */ | |
4800 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
4801 | { | |
4802 | int ret = 0, i; | |
4803 | ||
4804 | if (!entry || !entry->name || !entry->value) { | |
4805 | ret = -EINVAL; | |
4806 | goto end; | |
4807 | } | |
4808 | ||
4809 | /* Check if the option is to be ignored */ | |
4810 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
4811 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
4812 | goto end; | |
4813 | } | |
4814 | } | |
4815 | ||
4816 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
4817 | i++) { | |
4818 | ||
4819 | /* Ignore if not fully matched. */ | |
4820 | if (strcmp(entry->name, long_options[i].name)) { | |
4821 | continue; | |
4822 | } | |
4823 | ||
4824 | /* | |
4825 | * If the option takes no argument on the command line, we have to | |
4826 | * check if the value is "true". We support non-zero numeric values, | |
4827 | * true, on and yes. | |
4828 | */ | |
4829 | if (!long_options[i].has_arg) { | |
4830 | ret = config_parse_value(entry->value); | |
4831 | if (ret <= 0) { | |
4832 | if (ret) { | |
4833 | WARN("Invalid configuration value \"%s\" for option %s", | |
4834 | entry->value, entry->name); | |
4835 | } | |
4836 | /* False, skip boolean config option. */ | |
4837 | goto end; | |
4d076222 | 4838 | } |
26296c48 JG |
4839 | } |
4840 | ||
4841 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
4842 | goto end; | |
4843 | } | |
4844 | ||
4845 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
4846 | ||
4847 | end: | |
4848 | return ret; | |
4849 | } | |
4850 | ||
4851 | /* | |
4852 | * daemon configuration loading and argument parsing | |
4853 | */ | |
4854 | static int set_options(int argc, char **argv) | |
4855 | { | |
4856 | int ret = 0, c = 0, option_index = 0; | |
4857 | int orig_optopt = optopt, orig_optind = optind; | |
4858 | char *optstring; | |
4859 | const char *config_path = NULL; | |
4860 | ||
4861 | optstring = utils_generate_optstring(long_options, | |
4862 | sizeof(long_options) / sizeof(struct option)); | |
4863 | if (!optstring) { | |
4864 | ret = -ENOMEM; | |
4865 | goto end; | |
4866 | } | |
4867 | ||
4868 | /* Check for the --config option */ | |
4869 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
4870 | &option_index)) != -1) { | |
4871 | if (c == '?') { | |
4872 | ret = -EINVAL; | |
4873 | goto end; | |
4874 | } else if (c != 'f') { | |
4875 | /* if not equal to --config option. */ | |
4876 | continue; | |
4877 | } | |
4878 | ||
e8fa9fb0 MD |
4879 | if (lttng_is_setuid_setgid()) { |
4880 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4881 | "-f, --config"); | |
4882 | } else { | |
4883 | config_path = utils_expand_path(optarg); | |
4884 | if (!config_path) { | |
4885 | ERR("Failed to resolve path: %s", optarg); | |
4886 | } | |
26296c48 JG |
4887 | } |
4888 | } | |
4889 | ||
4890 | ret = config_get_section_entries(config_path, config_section_name, | |
4891 | config_entry_handler, NULL); | |
4892 | if (ret) { | |
4893 | if (ret > 0) { | |
4894 | ERR("Invalid configuration option at line %i", ret); | |
4895 | ret = -1; | |
4896 | } | |
4897 | goto end; | |
4898 | } | |
4899 | ||
4900 | /* Reset getopt's global state */ | |
4901 | optopt = orig_optopt; | |
4902 | optind = orig_optind; | |
4903 | while (1) { | |
0a17a3a0 JG |
4904 | option_index = -1; |
4905 | /* | |
4906 | * getopt_long() will not set option_index if it encounters a | |
4907 | * short option. | |
4908 | */ | |
4909 | c = getopt_long(argc, argv, optstring, long_options, | |
4910 | &option_index); | |
26296c48 | 4911 | if (c == -1) { |
4d076222 DG |
4912 | break; |
4913 | } | |
26296c48 | 4914 | |
0a17a3a0 JG |
4915 | /* |
4916 | * Pass NULL as the long option name if popt left the index | |
4917 | * unset. | |
4918 | */ | |
4919 | ret = set_option(c, optarg, | |
4920 | option_index < 0 ? NULL : | |
4921 | long_options[option_index].name); | |
26296c48 JG |
4922 | if (ret < 0) { |
4923 | break; | |
fac6795d DG |
4924 | } |
4925 | } | |
4926 | ||
26296c48 JG |
4927 | end: |
4928 | free(optstring); | |
4929 | return ret; | |
fac6795d DG |
4930 | } |
4931 | ||
4932 | /* | |
d063d709 | 4933 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
4934 | * apps_sock - The communication socket for all UST apps. |
4935 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 4936 | */ |
cf3af59e | 4937 | static int init_daemon_socket(void) |
fac6795d DG |
4938 | { |
4939 | int ret = 0; | |
4940 | mode_t old_umask; | |
4941 | ||
4942 | old_umask = umask(0); | |
4943 | ||
4944 | /* Create client tool unix socket */ | |
d6f42150 DG |
4945 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
4946 | if (client_sock < 0) { | |
4947 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
4948 | ret = -1; |
4949 | goto end; | |
4950 | } | |
4951 | ||
b662582b DG |
4952 | /* Set the cloexec flag */ |
4953 | ret = utils_set_fd_cloexec(client_sock); | |
4954 | if (ret < 0) { | |
4955 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
4956 | "Continuing but note that the consumer daemon will have a " | |
4957 | "reference to this socket on exec()", client_sock); | |
4958 | } | |
4959 | ||
fac6795d DG |
4960 | /* File permission MUST be 660 */ |
4961 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4962 | if (ret < 0) { | |
d6f42150 | 4963 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 4964 | PERROR("chmod"); |
fac6795d DG |
4965 | goto end; |
4966 | } | |
4967 | ||
4968 | /* Create the application unix socket */ | |
d6f42150 DG |
4969 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
4970 | if (apps_sock < 0) { | |
4971 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
4972 | ret = -1; |
4973 | goto end; | |
4974 | } | |
4975 | ||
b662582b DG |
4976 | /* Set the cloexec flag */ |
4977 | ret = utils_set_fd_cloexec(apps_sock); | |
4978 | if (ret < 0) { | |
4979 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
4980 | "Continuing but note that the consumer daemon will have a " | |
4981 | "reference to this socket on exec()", apps_sock); | |
4982 | } | |
4983 | ||
d6f42150 | 4984 | /* File permission MUST be 666 */ |
54d01ffb DG |
4985 | ret = chmod(apps_unix_sock_path, |
4986 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 4987 | if (ret < 0) { |
d6f42150 | 4988 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 4989 | PERROR("chmod"); |
fac6795d DG |
4990 | goto end; |
4991 | } | |
4992 | ||
b662582b DG |
4993 | DBG3("Session daemon client socket %d and application socket %d created", |
4994 | client_sock, apps_sock); | |
4995 | ||
fac6795d DG |
4996 | end: |
4997 | umask(old_umask); | |
4998 | return ret; | |
4999 | } | |
5000 | ||
5001 | /* | |
54d01ffb DG |
5002 | * Check if the global socket is available, and if a daemon is answering at the |
5003 | * other side. If yes, error is returned. | |
fac6795d | 5004 | */ |
cf3af59e | 5005 | static int check_existing_daemon(void) |
fac6795d | 5006 | { |
7d8234d9 | 5007 | /* Is there anybody out there ? */ |
099e26bd | 5008 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 5009 | return -EEXIST; |
099e26bd | 5010 | } |
b09c7c76 DG |
5011 | |
5012 | return 0; | |
fac6795d DG |
5013 | } |
5014 | ||
fac6795d | 5015 | /* |
d063d709 | 5016 | * Set the tracing group gid onto the client socket. |
5e16da05 | 5017 | * |
d063d709 | 5018 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 5019 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 5020 | */ |
be040666 | 5021 | static int set_permissions(char *rundir) |
fac6795d DG |
5022 | { |
5023 | int ret; | |
996b65c8 | 5024 | gid_t gid; |
fac6795d | 5025 | |
6c71277b | 5026 | gid = utils_get_group_id(tracing_group_name); |
fac6795d | 5027 | |
d6f42150 | 5028 | /* Set lttng run dir */ |
be040666 | 5029 | ret = chown(rundir, 0, gid); |
d6f42150 | 5030 | if (ret < 0) { |
be040666 | 5031 | ERR("Unable to set group on %s", rundir); |
76d7553f | 5032 | PERROR("chown"); |
d6f42150 DG |
5033 | } |
5034 | ||
6c71277b MD |
5035 | /* |
5036 | * Ensure all applications and tracing group can search the run | |
5037 | * dir. Allow everyone to read the directory, since it does not | |
5038 | * buy us anything to hide its content. | |
5039 | */ | |
5040 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
5041 | if (ret < 0) { |
5042 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 5043 | PERROR("chmod"); |
d1613cf5 JN |
5044 | } |
5045 | ||
d6f42150 | 5046 | /* lttng client socket path */ |
996b65c8 | 5047 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 5048 | if (ret < 0) { |
d6f42150 | 5049 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 5050 | PERROR("chown"); |
d6f42150 DG |
5051 | } |
5052 | ||
3bd1e081 | 5053 | /* kconsumer error socket path */ |
6c71277b | 5054 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 5055 | if (ret < 0) { |
3bd1e081 | 5056 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 5057 | PERROR("chown"); |
3bd1e081 MD |
5058 | } |
5059 | ||
7753dea8 | 5060 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 5061 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
5062 | if (ret < 0) { |
5063 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 5064 | PERROR("chown"); |
7753dea8 MD |
5065 | } |
5066 | ||
5067 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 5068 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 5069 | if (ret < 0) { |
7753dea8 | 5070 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 5071 | PERROR("chown"); |
fac6795d DG |
5072 | } |
5073 | ||
d6f42150 | 5074 | DBG("All permissions are set"); |
e07ae692 | 5075 | |
fac6795d DG |
5076 | return ret; |
5077 | } | |
5078 | ||
d6f42150 | 5079 | /* |
d063d709 | 5080 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 5081 | */ |
67e40797 | 5082 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
5083 | { |
5084 | int ret; | |
5085 | ||
67e40797 DG |
5086 | DBG3("Creating LTTng run directory: %s", rundir); |
5087 | ||
d1613cf5 | 5088 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 5089 | if (ret < 0) { |
b1f11e69 | 5090 | if (errno != EEXIST) { |
67e40797 | 5091 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
5092 | goto error; |
5093 | } else { | |
5094 | ret = 0; | |
5095 | } | |
d6f42150 DG |
5096 | } |
5097 | ||
5098 | error: | |
5099 | return ret; | |
5100 | } | |
5101 | ||
5102 | /* | |
d063d709 DG |
5103 | * Setup sockets and directory needed by the kconsumerd communication with the |
5104 | * session daemon. | |
d6f42150 | 5105 | */ |
67e40797 DG |
5106 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
5107 | const char *rundir) | |
d6f42150 DG |
5108 | { |
5109 | int ret; | |
67e40797 | 5110 | char path[PATH_MAX]; |
d6f42150 | 5111 | |
6c71277b | 5112 | switch (consumer_data->type) { |
7753dea8 | 5113 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 5114 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
5115 | break; |
5116 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 5117 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
5118 | break; |
5119 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 5120 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
5121 | break; |
5122 | default: | |
5123 | ERR("Consumer type unknown"); | |
5124 | ret = -EINVAL; | |
5125 | goto error; | |
d6f42150 DG |
5126 | } |
5127 | ||
67e40797 DG |
5128 | DBG2("Creating consumer directory: %s", path); |
5129 | ||
6c71277b | 5130 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
d6f42150 | 5131 | if (ret < 0) { |
6beb2242 | 5132 | if (errno != EEXIST) { |
f11e84c2 | 5133 | PERROR("mkdir"); |
3bd1e081 | 5134 | ERR("Failed to create %s", path); |
6beb2242 DG |
5135 | goto error; |
5136 | } | |
f11e84c2 | 5137 | ret = -1; |
d6f42150 | 5138 | } |
6c71277b MD |
5139 | if (is_root) { |
5140 | ret = chown(path, 0, utils_get_group_id(tracing_group_name)); | |
5141 | if (ret < 0) { | |
5142 | ERR("Unable to set group on %s", path); | |
5143 | PERROR("chown"); | |
5144 | goto error; | |
5145 | } | |
5146 | } | |
d6f42150 DG |
5147 | |
5148 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
5149 | consumer_data->err_sock = |
5150 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
5151 | if (consumer_data->err_sock < 0) { | |
5152 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
5153 | ret = -1; |
5154 | goto error; | |
5155 | } | |
5156 | ||
a24f05ab MD |
5157 | /* |
5158 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
5159 | * show must go on. | |
5160 | */ | |
5161 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
5162 | if (ret < 0) { | |
5163 | PERROR("utils_set_fd_cloexec"); | |
5164 | /* continue anyway */ | |
5165 | } | |
5166 | ||
d6f42150 | 5167 | /* File permission MUST be 660 */ |
3bd1e081 | 5168 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 5169 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 5170 | if (ret < 0) { |
3bd1e081 | 5171 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 5172 | PERROR("chmod"); |
d6f42150 DG |
5173 | goto error; |
5174 | } | |
5175 | ||
5176 | error: | |
5177 | return ret; | |
5178 | } | |
5179 | ||
fac6795d | 5180 | /* |
d063d709 | 5181 | * Signal handler for the daemon |
cf3af59e | 5182 | * |
54d01ffb DG |
5183 | * Simply stop all worker threads, leaving main() return gracefully after |
5184 | * joining all threads and calling cleanup(). | |
fac6795d DG |
5185 | */ |
5186 | static void sighandler(int sig) | |
5187 | { | |
5188 | switch (sig) { | |
cf3af59e | 5189 | case SIGPIPE: |
af87c45a | 5190 | DBG("SIGPIPE caught"); |
cf3af59e MD |
5191 | return; |
5192 | case SIGINT: | |
af87c45a | 5193 | DBG("SIGINT caught"); |
cf3af59e MD |
5194 | stop_threads(); |
5195 | break; | |
5196 | case SIGTERM: | |
af87c45a | 5197 | DBG("SIGTERM caught"); |
cf3af59e MD |
5198 | stop_threads(); |
5199 | break; | |
0bb7724a DG |
5200 | case SIGUSR1: |
5201 | CMM_STORE_SHARED(recv_child_signal, 1); | |
5202 | break; | |
cf3af59e MD |
5203 | default: |
5204 | break; | |
fac6795d | 5205 | } |
fac6795d DG |
5206 | } |
5207 | ||
5208 | /* | |
d063d709 | 5209 | * Setup signal handler for : |
1d4b027a | 5210 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 5211 | */ |
1d4b027a | 5212 | static int set_signal_handler(void) |
fac6795d | 5213 | { |
1d4b027a DG |
5214 | int ret = 0; |
5215 | struct sigaction sa; | |
5216 | sigset_t sigset; | |
fac6795d | 5217 | |
1d4b027a | 5218 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 5219 | PERROR("sigemptyset"); |
1d4b027a DG |
5220 | return ret; |
5221 | } | |
d6f42150 | 5222 | |
1d4b027a DG |
5223 | sa.sa_handler = sighandler; |
5224 | sa.sa_mask = sigset; | |
5225 | sa.sa_flags = 0; | |
5226 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 5227 | PERROR("sigaction"); |
1d4b027a | 5228 | return ret; |
d6f42150 DG |
5229 | } |
5230 | ||
1d4b027a | 5231 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 5232 | PERROR("sigaction"); |
1d4b027a | 5233 | return ret; |
d6f42150 | 5234 | } |
aaf26714 | 5235 | |
1d4b027a | 5236 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 5237 | PERROR("sigaction"); |
1d4b027a | 5238 | return ret; |
8c0faa1d DG |
5239 | } |
5240 | ||
0bb7724a DG |
5241 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
5242 | PERROR("sigaction"); | |
5243 | return ret; | |
5244 | } | |
5245 | ||
5246 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
5247 | |
5248 | return ret; | |
fac6795d DG |
5249 | } |
5250 | ||
f3ed775e | 5251 | /* |
d063d709 DG |
5252 | * Set open files limit to unlimited. This daemon can open a large number of |
5253 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
5254 | */ |
5255 | static void set_ulimit(void) | |
5256 | { | |
5257 | int ret; | |
5258 | struct rlimit lim; | |
5259 | ||
a88df331 | 5260 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
5261 | lim.rlim_cur = 65535; |
5262 | lim.rlim_max = 65535; | |
5263 | ||
5264 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
5265 | if (ret < 0) { | |
76d7553f | 5266 | PERROR("failed to set open files limit"); |
f3ed775e DG |
5267 | } |
5268 | } | |
5269 | ||
35f90c40 DG |
5270 | /* |
5271 | * Write pidfile using the rundir and opt_pidfile. | |
5272 | */ | |
4a15001e | 5273 | static int write_pidfile(void) |
35f90c40 DG |
5274 | { |
5275 | int ret; | |
5276 | char pidfile_path[PATH_MAX]; | |
5277 | ||
5278 | assert(rundir); | |
5279 | ||
5280 | if (opt_pidfile) { | |
5281 | strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path)); | |
5282 | } else { | |
5283 | /* Build pidfile path from rundir and opt_pidfile. */ | |
5284 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
5285 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
5286 | if (ret < 0) { | |
5287 | PERROR("snprintf pidfile path"); | |
5288 | goto error; | |
5289 | } | |
5290 | } | |
5291 | ||
5292 | /* | |
4a15001e | 5293 | * Create pid file in rundir. |
35f90c40 | 5294 | */ |
4a15001e | 5295 | ret = utils_create_pid_file(getpid(), pidfile_path); |
35f90c40 | 5296 | error: |
4a15001e | 5297 | return ret; |
35f90c40 DG |
5298 | } |
5299 | ||
c9cb3e7d JG |
5300 | /* |
5301 | * Create lockfile using the rundir and return its fd. | |
5302 | */ | |
5303 | static int create_lockfile(void) | |
5304 | { | |
5305 | int ret; | |
5306 | char lockfile_path[PATH_MAX]; | |
5307 | ||
5308 | ret = generate_lock_file_path(lockfile_path, sizeof(lockfile_path)); | |
5309 | if (ret < 0) { | |
5310 | goto error; | |
5311 | } | |
5312 | ||
5313 | ret = utils_create_lock_file(lockfile_path); | |
5314 | error: | |
5315 | return ret; | |
5316 | } | |
5317 | ||
cd9290dd | 5318 | /* |
022d91ba | 5319 | * Write agent TCP port using the rundir. |
cd9290dd | 5320 | */ |
4a15001e | 5321 | static int write_agent_port(void) |
cd9290dd DG |
5322 | { |
5323 | int ret; | |
5324 | char path[PATH_MAX]; | |
5325 | ||
5326 | assert(rundir); | |
5327 | ||
5328 | ret = snprintf(path, sizeof(path), "%s/" | |
022d91ba | 5329 | DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE, rundir); |
cd9290dd | 5330 | if (ret < 0) { |
022d91ba | 5331 | PERROR("snprintf agent port path"); |
cd9290dd DG |
5332 | goto error; |
5333 | } | |
5334 | ||
5335 | /* | |
4a15001e | 5336 | * Create TCP agent port file in rundir. |
cd9290dd | 5337 | */ |
4a15001e | 5338 | ret = utils_create_pid_file(agent_tcp_port, path); |
cd9290dd DG |
5339 | |
5340 | error: | |
4a15001e | 5341 | return ret; |
ef367a93 JG |
5342 | } |
5343 | ||
fac6795d DG |
5344 | /* |
5345 | * main | |
5346 | */ | |
5347 | int main(int argc, char **argv) | |
5348 | { | |
4a15001e | 5349 | int ret = 0, retval = 0; |
fac6795d | 5350 | void *status; |
ae9e45b3 | 5351 | const char *home_path, *env_app_timeout; |
fac6795d | 5352 | |
77cdfc81 JG |
5353 | /* Initialize agent apps ht global variable */ |
5354 | agent_apps_ht_by_sock = NULL; | |
5355 | ||
335a95b7 MD |
5356 | init_kernel_workarounds(); |
5357 | ||
f6a9efaa DG |
5358 | rcu_register_thread(); |
5359 | ||
4a15001e MD |
5360 | if (set_signal_handler()) { |
5361 | retval = -1; | |
5362 | goto exit_set_signal_handler; | |
0bb7724a DG |
5363 | } |
5364 | ||
7753dea8 | 5365 | setup_consumerd_path(); |
fb09408a | 5366 | |
12744796 DG |
5367 | page_size = sysconf(_SC_PAGESIZE); |
5368 | if (page_size < 0) { | |
5369 | PERROR("sysconf _SC_PAGESIZE"); | |
5370 | page_size = LONG_MAX; | |
5371 | WARN("Fallback page size to %ld", page_size); | |
5372 | } | |
5373 | ||
4a15001e MD |
5374 | /* |
5375 | * Parse arguments and load the daemon configuration file. | |
5376 | * | |
5377 | * We have an exit_options exit path to free memory reserved by | |
5378 | * set_options. This is needed because the rest of sessiond_cleanup() | |
5379 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
5380 | * depends on set_options. | |
5381 | */ | |
fac6795d | 5382 | progname = argv[0]; |
4a15001e MD |
5383 | if (set_options(argc, argv)) { |
5384 | retval = -1; | |
5385 | goto exit_options; | |
fac6795d DG |
5386 | } |
5387 | ||
5388 | /* Daemonize */ | |
72dd7491 | 5389 | if (opt_daemon || opt_background) { |
ceed52b5 MD |
5390 | int i; |
5391 | ||
72dd7491 MD |
5392 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
5393 | !opt_background); | |
53094c05 | 5394 | if (ret < 0) { |
4a15001e MD |
5395 | retval = -1; |
5396 | goto exit_options; | |
53094c05 | 5397 | } |
0bb7724a | 5398 | |
ceed52b5 | 5399 | /* |
0bb7724a | 5400 | * We are in the child. Make sure all other file descriptors are |
4a15001e MD |
5401 | * closed, in case we are called with more opened file |
5402 | * descriptors than the standard ones. | |
ceed52b5 MD |
5403 | */ |
5404 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
5405 | (void) close(i); | |
5406 | } | |
5407 | } | |
5408 | ||
4a15001e MD |
5409 | /* |
5410 | * Starting from here, we can create threads. This needs to be after | |
5411 | * lttng_daemonize due to RCU. | |
5412 | */ | |
5413 | ||
5414 | /* | |
5415 | * Initialize the health check subsystem. This call should set the | |
5416 | * appropriate time values. | |
5417 | */ | |
5418 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
5419 | if (!health_sessiond) { | |
5420 | PERROR("health_app_create error"); | |
5421 | retval = -1; | |
5422 | goto exit_health_sessiond_cleanup; | |
5423 | } | |
5424 | ||
5425 | if (init_ht_cleanup_quit_pipe()) { | |
5426 | retval = -1; | |
5427 | goto exit_ht_cleanup_quit_pipe; | |
5428 | } | |
5429 | ||
5430 | /* Setup the thread ht_cleanup communication pipe. */ | |
5431 | if (utils_create_pipe_cloexec(ht_cleanup_pipe)) { | |
5432 | retval = -1; | |
5433 | goto exit_ht_cleanup_pipe; | |
5434 | } | |
5435 | ||
25b397f9 MD |
5436 | /* Set up max poll set size */ |
5437 | if (lttng_poll_set_max_size()) { | |
5438 | retval = -1; | |
5439 | goto exit_set_max_size; | |
5440 | } | |
5441 | ||
4a15001e MD |
5442 | /* Create thread to clean up RCU hash tables */ |
5443 | ret = pthread_create(&ht_cleanup_thread, NULL, | |
5444 | thread_ht_cleanup, (void *) NULL); | |
5445 | if (ret) { | |
5446 | errno = ret; | |
5447 | PERROR("pthread_create ht_cleanup"); | |
5448 | retval = -1; | |
5449 | goto exit_ht_cleanup; | |
5450 | } | |
5451 | ||
ceed52b5 | 5452 | /* Create thread quit pipe */ |
4a15001e MD |
5453 | if (init_thread_quit_pipe()) { |
5454 | retval = -1; | |
5455 | goto exit_init_data; | |
fac6795d DG |
5456 | } |
5457 | ||
5458 | /* Check if daemon is UID = 0 */ | |
5459 | is_root = !getuid(); | |
5460 | ||
fac6795d | 5461 | if (is_root) { |
990570ed | 5462 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
4ea184d1 | 5463 | if (!rundir) { |
4a15001e MD |
5464 | retval = -1; |
5465 | goto exit_init_data; | |
4ea184d1 | 5466 | } |
67e40797 DG |
5467 | |
5468 | /* Create global run dir with root access */ | |
4a15001e MD |
5469 | if (create_lttng_rundir(rundir)) { |
5470 | retval = -1; | |
5471 | goto exit_init_data; | |
d6f42150 DG |
5472 | } |
5473 | ||
fac6795d | 5474 | if (strlen(apps_unix_sock_path) == 0) { |
4a15001e | 5475 | ret = snprintf(apps_unix_sock_path, PATH_MAX, |
d6f42150 | 5476 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); |
4a15001e MD |
5477 | if (ret < 0) { |
5478 | retval = -1; | |
5479 | goto exit_init_data; | |
5480 | } | |
fac6795d DG |
5481 | } |
5482 | ||
5483 | if (strlen(client_unix_sock_path) == 0) { | |
4a15001e | 5484 | ret = snprintf(client_unix_sock_path, PATH_MAX, |
d6f42150 | 5485 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); |
4a15001e MD |
5486 | if (ret < 0) { |
5487 | retval = -1; | |
5488 | goto exit_init_data; | |
5489 | } | |
d6f42150 | 5490 | } |
0fdd1e2c DG |
5491 | |
5492 | /* Set global SHM for ust */ | |
5493 | if (strlen(wait_shm_path) == 0) { | |
4a15001e | 5494 | ret = snprintf(wait_shm_path, PATH_MAX, |
0fdd1e2c | 5495 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); |
4a15001e MD |
5496 | if (ret < 0) { |
5497 | retval = -1; | |
5498 | goto exit_init_data; | |
5499 | } | |
0fdd1e2c | 5500 | } |
67e40797 | 5501 | |
44a5e5eb | 5502 | if (strlen(health_unix_sock_path) == 0) { |
4a15001e MD |
5503 | ret = snprintf(health_unix_sock_path, |
5504 | sizeof(health_unix_sock_path), | |
44a5e5eb | 5505 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); |
4a15001e MD |
5506 | if (ret < 0) { |
5507 | retval = -1; | |
5508 | goto exit_init_data; | |
5509 | } | |
44a5e5eb DG |
5510 | } |
5511 | ||
67e40797 | 5512 | /* Setup kernel consumerd path */ |
4a15001e | 5513 | ret = snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5514 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5515 | if (ret < 0) { |
5516 | retval = -1; | |
5517 | goto exit_init_data; | |
5518 | } | |
5519 | ret = snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5520 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5521 | if (ret < 0) { |
5522 | retval = -1; | |
5523 | goto exit_init_data; | |
5524 | } | |
67e40797 DG |
5525 | |
5526 | DBG2("Kernel consumer err path: %s", | |
5527 | kconsumer_data.err_unix_sock_path); | |
5528 | DBG2("Kernel consumer cmd path: %s", | |
5529 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 5530 | } else { |
feb0f3e5 | 5531 | home_path = utils_get_home_dir(); |
b082db07 | 5532 | if (home_path == NULL) { |
273ea72c DG |
5533 | /* TODO: Add --socket PATH option */ |
5534 | ERR("Can't get HOME directory for sockets creation."); | |
4a15001e MD |
5535 | retval = -1; |
5536 | goto exit_init_data; | |
b082db07 DG |
5537 | } |
5538 | ||
67e40797 DG |
5539 | /* |
5540 | * Create rundir from home path. This will create something like | |
5541 | * $HOME/.lttng | |
5542 | */ | |
990570ed | 5543 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 | 5544 | if (ret < 0) { |
4a15001e MD |
5545 | retval = -1; |
5546 | goto exit_init_data; | |
67e40797 DG |
5547 | } |
5548 | ||
4a15001e MD |
5549 | if (create_lttng_rundir(rundir)) { |
5550 | retval = -1; | |
5551 | goto exit_init_data; | |
67e40797 DG |
5552 | } |
5553 | ||
fac6795d | 5554 | if (strlen(apps_unix_sock_path) == 0) { |
4a15001e MD |
5555 | ret = snprintf(apps_unix_sock_path, PATH_MAX, |
5556 | DEFAULT_HOME_APPS_UNIX_SOCK, | |
5557 | home_path); | |
5558 | if (ret < 0) { | |
5559 | retval = -1; | |
5560 | goto exit_init_data; | |
5561 | } | |
fac6795d DG |
5562 | } |
5563 | ||
5564 | /* Set the cli tool unix socket path */ | |
5565 | if (strlen(client_unix_sock_path) == 0) { | |
4a15001e MD |
5566 | ret = snprintf(client_unix_sock_path, PATH_MAX, |
5567 | DEFAULT_HOME_CLIENT_UNIX_SOCK, | |
5568 | home_path); | |
5569 | if (ret < 0) { | |
5570 | retval = -1; | |
5571 | goto exit_init_data; | |
5572 | } | |
fac6795d | 5573 | } |
0fdd1e2c DG |
5574 | |
5575 | /* Set global SHM for ust */ | |
5576 | if (strlen(wait_shm_path) == 0) { | |
4a15001e MD |
5577 | ret = snprintf(wait_shm_path, PATH_MAX, |
5578 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, | |
5579 | getuid()); | |
5580 | if (ret < 0) { | |
5581 | retval = -1; | |
5582 | goto exit_init_data; | |
5583 | } | |
0fdd1e2c | 5584 | } |
44a5e5eb DG |
5585 | |
5586 | /* Set health check Unix path */ | |
5587 | if (strlen(health_unix_sock_path) == 0) { | |
4a15001e MD |
5588 | ret = snprintf(health_unix_sock_path, |
5589 | sizeof(health_unix_sock_path), | |
5590 | DEFAULT_HOME_HEALTH_UNIX_SOCK, | |
5591 | home_path); | |
5592 | if (ret < 0) { | |
5593 | retval = -1; | |
5594 | goto exit_init_data; | |
5595 | } | |
44a5e5eb | 5596 | } |
fac6795d DG |
5597 | } |
5598 | ||
c9cb3e7d JG |
5599 | lockfile_fd = create_lockfile(); |
5600 | if (lockfile_fd < 0) { | |
4a15001e MD |
5601 | retval = -1; |
5602 | goto exit_init_data; | |
c9cb3e7d JG |
5603 | } |
5604 | ||
5c827ce0 DG |
5605 | /* Set consumer initial state */ |
5606 | kernel_consumerd_state = CONSUMER_STOPPED; | |
5607 | ust_consumerd_state = CONSUMER_STOPPED; | |
5608 | ||
847177cd DG |
5609 | DBG("Client socket path %s", client_unix_sock_path); |
5610 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 5611 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
5612 | DBG("LTTng run directory path: %s", rundir); |
5613 | ||
5614 | /* 32 bits consumerd path setup */ | |
4a15001e | 5615 | ret = snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5616 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5617 | if (ret < 0) { |
5618 | PERROR("snprintf 32-bit consumer error socket path"); | |
5619 | retval = -1; | |
5620 | goto exit_init_data; | |
5621 | } | |
5622 | ret = snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5623 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5624 | if (ret < 0) { |
5625 | PERROR("snprintf 32-bit consumer command socket path"); | |
5626 | retval = -1; | |
5627 | goto exit_init_data; | |
5628 | } | |
67e40797 DG |
5629 | |
5630 | DBG2("UST consumer 32 bits err path: %s", | |
5631 | ustconsumer32_data.err_unix_sock_path); | |
5632 | DBG2("UST consumer 32 bits cmd path: %s", | |
5633 | ustconsumer32_data.cmd_unix_sock_path); | |
5634 | ||
5635 | /* 64 bits consumerd path setup */ | |
4a15001e | 5636 | ret = snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5637 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5638 | if (ret < 0) { |
5639 | PERROR("snprintf 64-bit consumer error socket path"); | |
5640 | retval = -1; | |
5641 | goto exit_init_data; | |
5642 | } | |
5643 | ret = snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5644 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5645 | if (ret < 0) { |
5646 | PERROR("snprintf 64-bit consumer command socket path"); | |
5647 | retval = -1; | |
5648 | goto exit_init_data; | |
5649 | } | |
67e40797 DG |
5650 | |
5651 | DBG2("UST consumer 64 bits err path: %s", | |
5652 | ustconsumer64_data.err_unix_sock_path); | |
5653 | DBG2("UST consumer 64 bits cmd path: %s", | |
5654 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 5655 | |
273ea72c | 5656 | /* |
7d8234d9 | 5657 | * See if daemon already exist. |
fac6795d | 5658 | */ |
4a15001e | 5659 | if (check_existing_daemon()) { |
75462a81 | 5660 | ERR("Already running daemon.\n"); |
273ea72c | 5661 | /* |
cf3af59e MD |
5662 | * We do not goto exit because we must not cleanup() |
5663 | * because a daemon is already running. | |
ab118b20 | 5664 | */ |
4a15001e MD |
5665 | retval = -1; |
5666 | goto exit_init_data; | |
a88df331 DG |
5667 | } |
5668 | ||
1427f9b2 DG |
5669 | /* |
5670 | * Init UST app hash table. Alloc hash table before this point since | |
5671 | * cleanup() can get called after that point. | |
5672 | */ | |
4a15001e | 5673 | if (ust_app_ht_alloc()) { |
cd0f7e67 | 5674 | ERR("Failed to allocate UST app hash table"); |
4a15001e MD |
5675 | retval = -1; |
5676 | goto exit_init_data; | |
5677 | } | |
1427f9b2 | 5678 | |
5642e70b JG |
5679 | /* |
5680 | * Initialize agent app hash table. We allocate the hash table here | |
5681 | * since cleanup() can get called after this point. | |
5682 | */ | |
5683 | if (agent_app_ht_alloc()) { | |
5684 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e MD |
5685 | retval = -1; |
5686 | goto exit_init_data; | |
f20baf8e DG |
5687 | } |
5688 | ||
a88df331 DG |
5689 | /* |
5690 | * These actions must be executed as root. We do that *after* setting up | |
5691 | * the sockets path because we MUST make the check for another daemon using | |
5692 | * those paths *before* trying to set the kernel consumer sockets and init | |
5693 | * kernel tracer. | |
5694 | */ | |
5695 | if (is_root) { | |
4a15001e MD |
5696 | if (set_consumer_sockets(&kconsumer_data, rundir)) { |
5697 | retval = -1; | |
5698 | goto exit_init_data; | |
7753dea8 MD |
5699 | } |
5700 | ||
a88df331 | 5701 | /* Setup kernel tracer */ |
4fba7219 DG |
5702 | if (!opt_no_kernel) { |
5703 | init_kernel_tracer(); | |
89588270 DG |
5704 | if (kernel_tracer_fd >= 0) { |
5705 | ret = syscall_init_table(); | |
5706 | if (ret < 0) { | |
4a15001e MD |
5707 | ERR("Unable to populate syscall table. " |
5708 | "Syscall tracing won't work " | |
5709 | "for this session daemon."); | |
89588270 | 5710 | } |
834978fd | 5711 | } |
4fba7219 | 5712 | } |
a88df331 DG |
5713 | |
5714 | /* Set ulimit for open files */ | |
5715 | set_ulimit(); | |
fac6795d | 5716 | } |
4063050c MD |
5717 | /* init lttng_fd tracking must be done after set_ulimit. */ |
5718 | lttng_fd_init(); | |
fac6795d | 5719 | |
4a15001e MD |
5720 | if (set_consumer_sockets(&ustconsumer64_data, rundir)) { |
5721 | retval = -1; | |
5722 | goto exit_init_data; | |
67e40797 DG |
5723 | } |
5724 | ||
4a15001e MD |
5725 | if (set_consumer_sockets(&ustconsumer32_data, rundir)) { |
5726 | retval = -1; | |
5727 | goto exit_init_data; | |
67e40797 DG |
5728 | } |
5729 | ||
d6f42150 | 5730 | /* Setup the needed unix socket */ |
4a15001e MD |
5731 | if (init_daemon_socket()) { |
5732 | retval = -1; | |
5733 | goto exit_init_data; | |
fac6795d DG |
5734 | } |
5735 | ||
5736 | /* Set credentials to socket */ | |
4a15001e MD |
5737 | if (is_root && set_permissions(rundir)) { |
5738 | retval = -1; | |
5739 | goto exit_init_data; | |
fac6795d DG |
5740 | } |
5741 | ||
5b8719f5 DG |
5742 | /* Get parent pid if -S, --sig-parent is specified. */ |
5743 | if (opt_sig_parent) { | |
5744 | ppid = getppid(); | |
5745 | } | |
5746 | ||
7a485870 | 5747 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 | 5748 | if (is_root && !opt_no_kernel) { |
4a15001e MD |
5749 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
5750 | retval = -1; | |
5751 | goto exit_init_data; | |
6620da75 | 5752 | } |
7a485870 DG |
5753 | } |
5754 | ||
099e26bd | 5755 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
5756 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
5757 | retval = -1; | |
5758 | goto exit_init_data; | |
099e26bd DG |
5759 | } |
5760 | ||
d0b96690 | 5761 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
5762 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
5763 | retval = -1; | |
5764 | goto exit_init_data; | |
d0b96690 DG |
5765 | } |
5766 | ||
7972aab2 DG |
5767 | /* Initialize global buffer per UID and PID registry. */ |
5768 | buffer_reg_init_uid_registry(); | |
5769 | buffer_reg_init_pid_registry(); | |
5770 | ||
099e26bd | 5771 | /* Init UST command queue. */ |
8bdee6e2 | 5772 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 5773 | |
273ea72c | 5774 | /* |
4a15001e MD |
5775 | * Get session list pointer. This pointer MUST NOT be free'd. This list |
5776 | * is statically declared in session.c | |
273ea72c | 5777 | */ |
54d01ffb | 5778 | session_list_ptr = session_get_list(); |
b5541356 | 5779 | |
2f77fc4b | 5780 | cmd_init(); |
00e2e675 | 5781 | |
ae9e45b3 DG |
5782 | /* Check for the application socket timeout env variable. */ |
5783 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
5784 | if (env_app_timeout) { | |
5785 | app_socket_timeout = atoi(env_app_timeout); | |
5786 | } else { | |
5787 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
5788 | } | |
5789 | ||
4a15001e MD |
5790 | ret = write_pidfile(); |
5791 | if (ret) { | |
5792 | ERR("Error in write_pidfile"); | |
5793 | retval = -1; | |
5794 | goto exit_init_data; | |
5795 | } | |
5796 | ret = write_agent_port(); | |
5797 | if (ret) { | |
5798 | ERR("Error in write_agent_port"); | |
5799 | retval = -1; | |
5800 | goto exit_init_data; | |
5801 | } | |
35f90c40 | 5802 | |
554831e7 MD |
5803 | /* Initialize communication library */ |
5804 | lttcomm_init(); | |
4a15001e | 5805 | /* Initialize TCP timeout values */ |
d831c249 | 5806 | lttcomm_inet_init(); |
554831e7 | 5807 | |
ef367a93 | 5808 | if (load_session_init_data(&load_info) < 0) { |
4a15001e MD |
5809 | retval = -1; |
5810 | goto exit_init_data; | |
ef367a93 JG |
5811 | } |
5812 | load_info->path = opt_load_session_path; | |
5813 | ||
d5b9fd2f | 5814 | /* Create health-check thread */ |
44a5e5eb DG |
5815 | ret = pthread_create(&health_thread, NULL, |
5816 | thread_manage_health, (void *) NULL); | |
4a15001e MD |
5817 | if (ret) { |
5818 | errno = ret; | |
44a5e5eb | 5819 | PERROR("pthread_create health"); |
4a15001e | 5820 | retval = -1; |
44a5e5eb DG |
5821 | goto exit_health; |
5822 | } | |
5823 | ||
cf3af59e | 5824 | /* Create thread to manage the client socket */ |
099e26bd DG |
5825 | ret = pthread_create(&client_thread, NULL, |
5826 | thread_manage_clients, (void *) NULL); | |
4a15001e MD |
5827 | if (ret) { |
5828 | errno = ret; | |
76d7553f | 5829 | PERROR("pthread_create clients"); |
4a15001e | 5830 | retval = -1; |
cf3af59e MD |
5831 | goto exit_client; |
5832 | } | |
fac6795d | 5833 | |
099e26bd DG |
5834 | /* Create thread to dispatch registration */ |
5835 | ret = pthread_create(&dispatch_thread, NULL, | |
5836 | thread_dispatch_ust_registration, (void *) NULL); | |
4a15001e MD |
5837 | if (ret) { |
5838 | errno = ret; | |
76d7553f | 5839 | PERROR("pthread_create dispatch"); |
4a15001e | 5840 | retval = -1; |
099e26bd DG |
5841 | goto exit_dispatch; |
5842 | } | |
5843 | ||
5844 | /* Create thread to manage application registration. */ | |
5845 | ret = pthread_create(®_apps_thread, NULL, | |
5846 | thread_registration_apps, (void *) NULL); | |
4a15001e MD |
5847 | if (ret) { |
5848 | errno = ret; | |
76d7553f | 5849 | PERROR("pthread_create registration"); |
4a15001e | 5850 | retval = -1; |
099e26bd DG |
5851 | goto exit_reg_apps; |
5852 | } | |
5853 | ||
cf3af59e | 5854 | /* Create thread to manage application socket */ |
54d01ffb DG |
5855 | ret = pthread_create(&apps_thread, NULL, |
5856 | thread_manage_apps, (void *) NULL); | |
4a15001e MD |
5857 | if (ret) { |
5858 | errno = ret; | |
d0b96690 | 5859 | PERROR("pthread_create apps"); |
4a15001e | 5860 | retval = -1; |
d0b96690 DG |
5861 | goto exit_apps; |
5862 | } | |
5863 | ||
5864 | /* Create thread to manage application notify socket */ | |
5865 | ret = pthread_create(&apps_notify_thread, NULL, | |
5866 | ust_thread_manage_notify, (void *) NULL); | |
4a15001e MD |
5867 | if (ret) { |
5868 | errno = ret; | |
f5c32ef1 | 5869 | PERROR("pthread_create notify"); |
4a15001e | 5870 | retval = -1; |
9563b0ad | 5871 | goto exit_apps_notify; |
cf3af59e | 5872 | } |
fac6795d | 5873 | |
022d91ba DG |
5874 | /* Create agent registration thread. */ |
5875 | ret = pthread_create(&agent_reg_thread, NULL, | |
5876 | agent_thread_manage_registration, (void *) NULL); | |
4a15001e MD |
5877 | if (ret) { |
5878 | errno = ret; | |
022d91ba | 5879 | PERROR("pthread_create agent"); |
4a15001e | 5880 | retval = -1; |
022d91ba | 5881 | goto exit_agent_reg; |
4d076222 DG |
5882 | } |
5883 | ||
6620da75 DG |
5884 | /* Don't start this thread if kernel tracing is not requested nor root */ |
5885 | if (is_root && !opt_no_kernel) { | |
5886 | /* Create kernel thread to manage kernel event */ | |
5887 | ret = pthread_create(&kernel_thread, NULL, | |
5888 | thread_manage_kernel, (void *) NULL); | |
4a15001e MD |
5889 | if (ret) { |
5890 | errno = ret; | |
6620da75 | 5891 | PERROR("pthread_create kernel"); |
4a15001e | 5892 | retval = -1; |
6620da75 DG |
5893 | goto exit_kernel; |
5894 | } | |
ef367a93 | 5895 | } |
7a485870 | 5896 | |
4a15001e MD |
5897 | /* Create session loading thread. */ |
5898 | ret = pthread_create(&load_session_thread, NULL, thread_load_session, | |
5899 | load_info); | |
5900 | if (ret) { | |
5901 | errno = ret; | |
5902 | PERROR("pthread_create load_session_thread"); | |
5903 | retval = -1; | |
5904 | goto exit_load_session; | |
5905 | } | |
5906 | ||
5907 | /* | |
5908 | * This is where we start awaiting program completion (e.g. through | |
5909 | * signal that asks threads to teardown). | |
5910 | */ | |
5911 | ||
5912 | ret = pthread_join(load_session_thread, &status); | |
5913 | if (ret) { | |
5914 | errno = ret; | |
5915 | PERROR("pthread_join load_session_thread"); | |
5916 | retval = -1; | |
5917 | } | |
5918 | exit_load_session: | |
ef367a93 JG |
5919 | |
5920 | if (is_root && !opt_no_kernel) { | |
6620da75 | 5921 | ret = pthread_join(kernel_thread, &status); |
4a15001e MD |
5922 | if (ret) { |
5923 | errno = ret; | |
6620da75 | 5924 | PERROR("pthread_join"); |
4a15001e | 5925 | retval = -1; |
6620da75 | 5926 | } |
fac6795d | 5927 | } |
cf3af59e | 5928 | exit_kernel: |
4a15001e | 5929 | |
022d91ba | 5930 | ret = pthread_join(agent_reg_thread, &status); |
4a15001e MD |
5931 | if (ret) { |
5932 | errno = ret; | |
022d91ba | 5933 | PERROR("pthread_join agent"); |
4a15001e | 5934 | retval = -1; |
4d076222 | 5935 | } |
022d91ba | 5936 | exit_agent_reg: |
4a15001e | 5937 | |
9563b0ad | 5938 | ret = pthread_join(apps_notify_thread, &status); |
4a15001e MD |
5939 | if (ret) { |
5940 | errno = ret; | |
9563b0ad | 5941 | PERROR("pthread_join apps notify"); |
4a15001e | 5942 | retval = -1; |
9563b0ad | 5943 | } |
9563b0ad | 5944 | exit_apps_notify: |
4a15001e | 5945 | |
cf3af59e | 5946 | ret = pthread_join(apps_thread, &status); |
4a15001e MD |
5947 | if (ret) { |
5948 | errno = ret; | |
9563b0ad | 5949 | PERROR("pthread_join apps"); |
4a15001e | 5950 | retval = -1; |
cf3af59e | 5951 | } |
cf3af59e | 5952 | exit_apps: |
4a15001e | 5953 | |
099e26bd | 5954 | ret = pthread_join(reg_apps_thread, &status); |
4a15001e MD |
5955 | if (ret) { |
5956 | errno = ret; | |
76d7553f | 5957 | PERROR("pthread_join"); |
4a15001e | 5958 | retval = -1; |
099e26bd | 5959 | } |
099e26bd | 5960 | exit_reg_apps: |
4a15001e | 5961 | |
7dac4903 MD |
5962 | /* |
5963 | * Join dispatch thread after joining reg_apps_thread to ensure | |
5964 | * we don't leak applications in the queue. | |
5965 | */ | |
099e26bd | 5966 | ret = pthread_join(dispatch_thread, &status); |
4a15001e MD |
5967 | if (ret) { |
5968 | errno = ret; | |
76d7553f | 5969 | PERROR("pthread_join"); |
4a15001e | 5970 | retval = -1; |
099e26bd | 5971 | } |
099e26bd | 5972 | exit_dispatch: |
4a15001e | 5973 | |
cf3af59e | 5974 | ret = pthread_join(client_thread, &status); |
4a15001e MD |
5975 | if (ret) { |
5976 | errno = ret; | |
76d7553f | 5977 | PERROR("pthread_join"); |
4a15001e | 5978 | retval = -1; |
cf3af59e | 5979 | } |
4a15001e | 5980 | exit_client: |
a88df331 | 5981 | |
4a15001e MD |
5982 | ret = pthread_join(health_thread, &status); |
5983 | if (ret) { | |
5984 | errno = ret; | |
5985 | PERROR("pthread_join health thread"); | |
5986 | retval = -1; | |
06f525de | 5987 | } |
4a15001e | 5988 | exit_health: |
06f525de | 5989 | |
4a15001e MD |
5990 | exit_init_data: |
5991 | /* | |
5992 | * sessiond_cleanup() is called when no other thread is running, except | |
5993 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
5994 | */ | |
5995 | rcu_thread_online(); | |
5996 | sessiond_cleanup(); | |
5997 | rcu_thread_offline(); | |
5998 | rcu_unregister_thread(); | |
06f525de | 5999 | |
4a15001e MD |
6000 | ret = notify_thread_pipe(ht_cleanup_quit_pipe[1]); |
6001 | if (ret < 0) { | |
6002 | ERR("write error on ht_cleanup quit pipe"); | |
6003 | retval = -1; | |
06f525de DG |
6004 | } |
6005 | ||
0b2dc8df | 6006 | ret = pthread_join(ht_cleanup_thread, &status); |
4a15001e MD |
6007 | if (ret) { |
6008 | errno = ret; | |
0b2dc8df | 6009 | PERROR("pthread_join ht cleanup thread"); |
4a15001e | 6010 | retval = -1; |
0b2dc8df MD |
6011 | } |
6012 | exit_ht_cleanup: | |
25b397f9 | 6013 | exit_set_max_size: |
4a15001e MD |
6014 | |
6015 | utils_close_pipe(ht_cleanup_pipe); | |
6016 | exit_ht_cleanup_pipe: | |
6017 | ||
cf3af59e | 6018 | /* |
4a15001e | 6019 | * Close the ht_cleanup quit pipe. |
cf3af59e | 6020 | */ |
4a15001e MD |
6021 | utils_close_pipe(ht_cleanup_quit_pipe); |
6022 | exit_ht_cleanup_quit_pipe: | |
6023 | ||
6024 | health_app_destroy(health_sessiond); | |
6025 | exit_health_sessiond_cleanup: | |
6026 | ||
6027 | exit_options: | |
6028 | sessiond_cleanup_options(); | |
6029 | ||
6030 | exit_set_signal_handler: | |
9c910722 MD |
6031 | /* Ensure all prior call_rcu are done. */ |
6032 | rcu_barrier(); | |
6033 | ||
4a15001e | 6034 | if (!retval) { |
cf3af59e | 6035 | exit(EXIT_SUCCESS); |
4a15001e MD |
6036 | } else { |
6037 | exit(EXIT_FAILURE); | |
67e40797 | 6038 | } |
fac6795d | 6039 | } |