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