Commit | Line | Data |
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826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
0fdd1e2c | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
26296c48 | 4 | * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 5 | * |
d14d33bf AM |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License, version 2 only, | |
8 | * as published by the Free Software Foundation. | |
91d76f53 | 9 | * |
d14d33bf AM |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
91d76f53 | 14 | * |
d14d33bf AM |
15 | * You should have received a copy of the GNU General Public License along |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
fac6795d DG |
18 | */ |
19 | ||
6c1c0768 | 20 | #define _LGPL_SOURCE |
fac6795d DG |
21 | #include <getopt.h> |
22 | #include <grp.h> | |
23 | #include <limits.h> | |
0bb7724a | 24 | #include <paths.h> |
fac6795d DG |
25 | #include <pthread.h> |
26 | #include <signal.h> | |
27 | #include <stdio.h> | |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
331744e3 | 30 | #include <inttypes.h> |
0fdd1e2c | 31 | #include <sys/mman.h> |
b73401da | 32 | #include <sys/mount.h> |
1e307fab | 33 | #include <sys/resource.h> |
fac6795d DG |
34 | #include <sys/socket.h> |
35 | #include <sys/stat.h> | |
36 | #include <sys/types.h> | |
0fdd1e2c | 37 | #include <sys/wait.h> |
5c827ce0 | 38 | #include <urcu/uatomic.h> |
fac6795d | 39 | #include <unistd.h> |
4f0b90ee | 40 | #include <ctype.h> |
fac6795d | 41 | |
990570ed | 42 | #include <common/common.h> |
d27c42b8 | 43 | #include <common/compat/socket.h> |
e8fa9fb0 | 44 | #include <common/compat/getenv.h> |
db758600 DG |
45 | #include <common/defaults.h> |
46 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 47 | #include <common/futex.h> |
00e2e675 | 48 | #include <common/relayd/relayd.h> |
81b86775 | 49 | #include <common/utils.h> |
3ccdf997 | 50 | #include <common/daemonize.h> |
f40ef1d5 | 51 | #include <common/config/session-config.h> |
fac6795d | 52 | |
10a8a223 | 53 | #include "lttng-sessiond.h" |
7972aab2 | 54 | #include "buffer-registry.h" |
54d01ffb | 55 | #include "channel.h" |
2f77fc4b | 56 | #include "cmd.h" |
00e2e675 | 57 | #include "consumer.h" |
099e26bd | 58 | #include "context.h" |
54d01ffb | 59 | #include "event.h" |
4771f025 | 60 | #include "kernel.h" |
f1e16794 | 61 | #include "kernel-consumer.h" |
096102bd | 62 | #include "modprobe.h" |
0fdd1e2c | 63 | #include "shm.h" |
1e307fab | 64 | #include "ust-ctl.h" |
00e2e675 | 65 | #include "ust-consumer.h" |
8e68d1c8 | 66 | #include "utils.h" |
4063050c | 67 | #include "fd-limit.h" |
8782cc74 | 68 | #include "health-sessiond.h" |
8ac94142 | 69 | #include "testpoint.h" |
d0b96690 | 70 | #include "ust-thread.h" |
022d91ba | 71 | #include "agent-thread.h" |
fb198a11 | 72 | #include "save.h" |
ef367a93 | 73 | #include "load-session-thread.h" |
de27ada2 | 74 | #include "notification-thread.h" |
834978fd | 75 | #include "syscall.h" |
7c1d2758 | 76 | #include "agent.h" |
5e97de00 | 77 | #include "ht-cleanup.h" |
fac6795d | 78 | |
ebaeda94 MD |
79 | #define CONSUMERD_FILE "lttng-consumerd" |
80 | ||
fac6795d | 81 | const char *progname; |
6c71277b | 82 | static const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
26296c48 JG |
83 | static int tracing_group_name_override; |
84 | static char *opt_pidfile; | |
5b8719f5 | 85 | static int opt_sig_parent; |
97e19046 | 86 | static int opt_verbose_consumer; |
72dd7491 | 87 | static int opt_daemon, opt_background; |
4fba7219 | 88 | static int opt_no_kernel; |
ef367a93 | 89 | static char *opt_load_session_path; |
1d4b027a | 90 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
0bb7724a | 91 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ |
67e40797 | 92 | static char *rundir; |
c9cb3e7d | 93 | static int lockfile_fd = -1; |
3bd1e081 | 94 | |
0bb7724a DG |
95 | /* Set to 1 when a SIGUSR1 signal is received. */ |
96 | static int recv_child_signal; | |
97 | ||
a23ec3a7 DG |
98 | /* |
99 | * Consumer daemon specific control data. Every value not initialized here is | |
100 | * set to 0 by the static definition. | |
101 | */ | |
3bd1e081 MD |
102 | static struct consumer_data kconsumer_data = { |
103 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
104 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
105 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
03550b58 MD |
106 | .err_sock = -1, |
107 | .cmd_sock = -1, | |
173af62f DG |
108 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
109 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
110 | .cond = PTHREAD_COND_INITIALIZER, |
111 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 112 | }; |
7753dea8 MD |
113 | static struct consumer_data ustconsumer64_data = { |
114 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
115 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
116 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
117 | .err_sock = -1, |
118 | .cmd_sock = -1, | |
173af62f DG |
119 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
120 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
121 | .cond = PTHREAD_COND_INITIALIZER, |
122 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
123 | }; |
124 | static struct consumer_data ustconsumer32_data = { | |
125 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
126 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
127 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
128 | .err_sock = -1, |
129 | .cmd_sock = -1, | |
173af62f DG |
130 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
131 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
132 | .cond = PTHREAD_COND_INITIALIZER, |
133 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
134 | }; |
135 | ||
26296c48 JG |
136 | /* Command line options */ |
137 | static const struct option long_options[] = { | |
0f5ea17c JG |
138 | { "client-sock", required_argument, 0, 'c' }, |
139 | { "apps-sock", required_argument, 0, 'a' }, | |
140 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
141 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
142 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
143 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
144 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
145 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
146 | { "consumerd32-path", required_argument, 0, '\0' }, | |
147 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
148 | { "consumerd64-path", required_argument, 0, '\0' }, | |
149 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
150 | { "daemonize", no_argument, 0, 'd' }, | |
151 | { "background", no_argument, 0, 'b' }, | |
152 | { "sig-parent", no_argument, 0, 'S' }, | |
153 | { "help", no_argument, 0, 'h' }, | |
154 | { "group", required_argument, 0, 'g' }, | |
155 | { "version", no_argument, 0, 'V' }, | |
156 | { "quiet", no_argument, 0, 'q' }, | |
157 | { "verbose", no_argument, 0, 'v' }, | |
158 | { "verbose-consumer", no_argument, 0, '\0' }, | |
159 | { "no-kernel", no_argument, 0, '\0' }, | |
160 | { "pidfile", required_argument, 0, 'p' }, | |
161 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
162 | { "config", required_argument, 0, 'f' }, | |
163 | { "load", required_argument, 0, 'l' }, | |
164 | { "kmod-probes", required_argument, 0, '\0' }, | |
165 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
26296c48 JG |
166 | { NULL, 0, 0, 0 } |
167 | }; | |
168 | ||
169 | /* Command line options to ignore from configuration file */ | |
170 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
171 | ||
26c9d55e | 172 | /* Shared between threads */ |
099e26bd | 173 | static int dispatch_thread_exit; |
fac6795d | 174 | |
54d01ffb DG |
175 | /* Global application Unix socket path */ |
176 | static char apps_unix_sock_path[PATH_MAX]; | |
177 | /* Global client Unix socket path */ | |
178 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
179 | /* global wait shm path for UST */ |
180 | static char wait_shm_path[PATH_MAX]; | |
44a5e5eb DG |
181 | /* Global health check unix path */ |
182 | static char health_unix_sock_path[PATH_MAX]; | |
fac6795d | 183 | |
1d4b027a | 184 | /* Sockets and FDs */ |
a4b35e07 MD |
185 | static int client_sock = -1; |
186 | static int apps_sock = -1; | |
2f77fc4b | 187 | int kernel_tracer_fd = -1; |
76d7553f | 188 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 189 | |
273ea72c DG |
190 | /* |
191 | * Quit pipe for all threads. This permits a single cancellation point | |
192 | * for all threads when receiving an event on the pipe. | |
193 | */ | |
76d7553f | 194 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 195 | |
099e26bd DG |
196 | /* |
197 | * This pipe is used to inform the thread managing application communication | |
198 | * that a command is queued and ready to be processed. | |
199 | */ | |
76d7553f | 200 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 201 | |
d0b96690 DG |
202 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
203 | ||
1d4b027a | 204 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 205 | static pthread_t apps_thread; |
d0b96690 | 206 | static pthread_t apps_notify_thread; |
099e26bd | 207 | static pthread_t reg_apps_thread; |
1d4b027a | 208 | static pthread_t client_thread; |
7a485870 | 209 | static pthread_t kernel_thread; |
099e26bd | 210 | static pthread_t dispatch_thread; |
44a5e5eb | 211 | static pthread_t health_thread; |
0b2dc8df | 212 | static pthread_t ht_cleanup_thread; |
022d91ba | 213 | static pthread_t agent_reg_thread; |
ef367a93 | 214 | static pthread_t load_session_thread; |
de27ada2 | 215 | static pthread_t notification_thread; |
5eb91c98 | 216 | |
099e26bd DG |
217 | /* |
218 | * UST registration command queue. This queue is tied with a futex and uses a N | |
219 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
220 | * | |
b22c5da8 DG |
221 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
222 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
223 | * the line new application socket and monitors it for any I/O error or clean | |
224 | * close that triggers an unregistration of the application. | |
099e26bd DG |
225 | */ |
226 | static struct ust_cmd_queue ust_cmd_queue; | |
227 | ||
b5541356 DG |
228 | /* |
229 | * Pointer initialized before thread creation. | |
230 | * | |
231 | * This points to the tracing session list containing the session count and a | |
232 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
233 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 234 | * |
d063d709 | 235 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 236 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
237 | */ |
238 | static struct ltt_session_list *session_list_ptr; | |
239 | ||
7753dea8 MD |
240 | int ust_consumerd64_fd = -1; |
241 | int ust_consumerd32_fd = -1; | |
242 | ||
fb6f1fa2 YB |
243 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
244 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
245 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
246 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
26296c48 JG |
247 | static int consumerd32_bin_override; |
248 | static int consumerd64_bin_override; | |
249 | static int consumerd32_libdir_override; | |
250 | static int consumerd64_libdir_override; | |
fb09408a | 251 | |
2f77fc4b DG |
252 | static const char *module_proc_lttng = "/proc/lttng"; |
253 | ||
5c827ce0 DG |
254 | /* |
255 | * Consumer daemon state which is changed when spawning it, killing it or in | |
256 | * case of a fatal error. | |
257 | */ | |
258 | enum consumerd_state { | |
259 | CONSUMER_STARTED = 1, | |
260 | CONSUMER_STOPPED = 2, | |
261 | CONSUMER_ERROR = 3, | |
262 | }; | |
263 | ||
264 | /* | |
265 | * This consumer daemon state is used to validate if a client command will be | |
266 | * able to reach the consumer. If not, the client is informed. For instance, | |
267 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
268 | * error to the client. | |
269 | * | |
270 | * The following example shows a possible race condition of this scheme: | |
271 | * | |
272 | * consumer thread error happens | |
273 | * client cmd arrives | |
274 | * client cmd checks state -> still OK | |
275 | * consumer thread exit, sets error | |
276 | * client cmd try to talk to consumer | |
277 | * ... | |
278 | * | |
279 | * However, since the consumer is a different daemon, we have no way of making | |
280 | * sure the command will reach it safely even with this state flag. This is why | |
281 | * we consider that up to the state validation during command processing, the | |
282 | * command is safe. After that, we can not guarantee the correctness of the | |
283 | * client request vis-a-vis the consumer. | |
284 | */ | |
285 | static enum consumerd_state ust_consumerd_state; | |
286 | static enum consumerd_state kernel_consumerd_state; | |
287 | ||
ae9e45b3 DG |
288 | /* |
289 | * Socket timeout for receiving and sending in seconds. | |
290 | */ | |
291 | static int app_socket_timeout; | |
292 | ||
12744796 DG |
293 | /* Set in main() with the current page size. */ |
294 | long page_size; | |
295 | ||
8782cc74 MD |
296 | /* Application health monitoring */ |
297 | struct health_app *health_sessiond; | |
298 | ||
022d91ba DG |
299 | /* Agent TCP port for registration. Used by the agent thread. */ |
300 | unsigned int agent_tcp_port = DEFAULT_AGENT_TCP_PORT; | |
4d076222 | 301 | |
f43f95a9 DG |
302 | /* Am I root or not. */ |
303 | int is_root; /* Set to 1 if the daemon is running as root */ | |
304 | ||
26296c48 JG |
305 | const char * const config_section_name = "sessiond"; |
306 | ||
ef367a93 JG |
307 | /* Load session thread information to operate. */ |
308 | struct load_session_thread_data *load_info; | |
309 | ||
de27ada2 JG |
310 | /* Notification thread command queue. */ |
311 | struct notification_thread_data *notification_thread_data; | |
312 | ||
7c1d2758 JG |
313 | /* Global hash tables */ |
314 | struct lttng_ht *agent_apps_ht_by_sock = NULL; | |
315 | ||
97bc1426 MD |
316 | /* |
317 | * Whether sessiond is ready for commands/health check requests. | |
318 | * NR_LTTNG_SESSIOND_READY must match the number of calls to | |
ef367a93 | 319 | * sessiond_notify_ready(). |
97bc1426 | 320 | */ |
ef367a93 | 321 | #define NR_LTTNG_SESSIOND_READY 3 |
97bc1426 MD |
322 | int lttng_sessiond_ready = NR_LTTNG_SESSIOND_READY; |
323 | ||
5e97de00 JG |
324 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
325 | { | |
326 | return (fd == thread_quit_pipe[0] && (events & LPOLLIN)) ? 1 : 0; | |
327 | } | |
328 | ||
97bc1426 | 329 | /* Notify parents that we are ready for cmd and health check */ |
ef367a93 JG |
330 | LTTNG_HIDDEN |
331 | void sessiond_notify_ready(void) | |
97bc1426 MD |
332 | { |
333 | if (uatomic_sub_return(<tng_sessiond_ready, 1) == 0) { | |
334 | /* | |
335 | * Notify parent pid that we are ready to accept command | |
336 | * for client side. This ppid is the one from the | |
337 | * external process that spawned us. | |
338 | */ | |
339 | if (opt_sig_parent) { | |
340 | kill(ppid, SIGUSR1); | |
341 | } | |
342 | ||
343 | /* | |
344 | * Notify the parent of the fork() process that we are | |
345 | * ready. | |
346 | */ | |
72dd7491 | 347 | if (opt_daemon || opt_background) { |
97bc1426 MD |
348 | kill(child_ppid, SIGUSR1); |
349 | } | |
350 | } | |
351 | } | |
352 | ||
fb09408a | 353 | static |
7753dea8 | 354 | void setup_consumerd_path(void) |
fb09408a | 355 | { |
fc7a59ce | 356 | const char *bin, *libdir; |
fb09408a | 357 | |
7753dea8 MD |
358 | /* |
359 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
360 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
361 | * has not been defined. | |
7753dea8 | 362 | */ |
ebaeda94 | 363 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
364 | if (!consumerd32_bin[0]) { |
365 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
366 | } |
367 | if (!consumerd32_libdir[0]) { | |
368 | consumerd32_libdir = INSTALL_LIB_PATH; | |
369 | } | |
370 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
371 | if (!consumerd64_bin[0]) { |
372 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 373 | } |
ebaeda94 MD |
374 | if (!consumerd64_libdir[0]) { |
375 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
376 | } |
377 | #else | |
378 | #error "Unknown bitness" | |
379 | #endif | |
380 | ||
fb09408a MD |
381 | /* |
382 | * runtime env. var. overrides the build default. | |
383 | */ | |
e8fa9fb0 | 384 | bin = lttng_secure_getenv("LTTNG_CONSUMERD32_BIN"); |
fc7a59ce AM |
385 | if (bin) { |
386 | consumerd32_bin = bin; | |
7753dea8 | 387 | } |
e8fa9fb0 | 388 | bin = lttng_secure_getenv("LTTNG_CONSUMERD64_BIN"); |
fc7a59ce AM |
389 | if (bin) { |
390 | consumerd64_bin = bin; | |
ebaeda94 | 391 | } |
e8fa9fb0 | 392 | libdir = lttng_secure_getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
393 | if (libdir) { |
394 | consumerd32_libdir = libdir; | |
395 | } | |
e8fa9fb0 | 396 | libdir = lttng_secure_getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
397 | if (libdir) { |
398 | consumerd64_libdir = libdir; | |
fb09408a MD |
399 | } |
400 | } | |
401 | ||
4a15001e MD |
402 | static |
403 | int __sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size, | |
404 | int *a_pipe) | |
5eb91c98 DG |
405 | { |
406 | int ret; | |
407 | ||
d0b96690 | 408 | assert(events); |
5eb91c98 DG |
409 | |
410 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
411 | if (ret < 0) { | |
412 | goto error; | |
413 | } | |
414 | ||
415 | /* Add quit pipe */ | |
4a15001e | 416 | ret = lttng_poll_add(events, a_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
417 | if (ret < 0) { |
418 | goto error; | |
419 | } | |
420 | ||
421 | return 0; | |
422 | ||
423 | error: | |
424 | return ret; | |
425 | } | |
426 | ||
4a15001e MD |
427 | /* |
428 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
429 | */ | |
430 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) | |
431 | { | |
432 | return __sessiond_set_thread_pollset(events, size, thread_quit_pipe); | |
433 | } | |
434 | ||
273ea72c | 435 | /* |
5eb91c98 | 436 | * Init thread quit pipe. |
273ea72c DG |
437 | * |
438 | * Return -1 on error or 0 if all pipes are created. | |
439 | */ | |
4a15001e | 440 | static int __init_thread_quit_pipe(int *a_pipe) |
273ea72c | 441 | { |
730389d9 | 442 | int ret, i; |
273ea72c | 443 | |
4a15001e | 444 | ret = pipe(a_pipe); |
273ea72c | 445 | if (ret < 0) { |
730389d9 | 446 | PERROR("thread quit pipe"); |
273ea72c DG |
447 | goto error; |
448 | } | |
449 | ||
730389d9 | 450 | for (i = 0; i < 2; i++) { |
4a15001e | 451 | ret = fcntl(a_pipe[i], F_SETFD, FD_CLOEXEC); |
730389d9 DG |
452 | if (ret < 0) { |
453 | PERROR("fcntl"); | |
454 | goto error; | |
455 | } | |
456 | } | |
457 | ||
273ea72c DG |
458 | error: |
459 | return ret; | |
460 | } | |
461 | ||
4a15001e MD |
462 | static int init_thread_quit_pipe(void) |
463 | { | |
464 | return __init_thread_quit_pipe(thread_quit_pipe); | |
465 | } | |
466 | ||
099e26bd DG |
467 | /* |
468 | * Stop all threads by closing the thread quit pipe. | |
469 | */ | |
cf3af59e MD |
470 | static void stop_threads(void) |
471 | { | |
5eb91c98 DG |
472 | int ret; |
473 | ||
cf3af59e MD |
474 | /* Stopping all threads */ |
475 | DBG("Terminating all threads"); | |
54d01ffb | 476 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
477 | if (ret < 0) { |
478 | ERR("write error on thread quit pipe"); | |
479 | } | |
480 | ||
099e26bd | 481 | /* Dispatch thread */ |
26c9d55e | 482 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 483 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
484 | } |
485 | ||
e975f9f8 DG |
486 | /* |
487 | * Close every consumer sockets. | |
488 | */ | |
489 | static void close_consumer_sockets(void) | |
490 | { | |
491 | int ret; | |
492 | ||
493 | if (kconsumer_data.err_sock >= 0) { | |
494 | ret = close(kconsumer_data.err_sock); | |
495 | if (ret < 0) { | |
496 | PERROR("kernel consumer err_sock close"); | |
497 | } | |
498 | } | |
499 | if (ustconsumer32_data.err_sock >= 0) { | |
500 | ret = close(ustconsumer32_data.err_sock); | |
501 | if (ret < 0) { | |
a76cbd9f | 502 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
503 | } |
504 | } | |
505 | if (ustconsumer64_data.err_sock >= 0) { | |
506 | ret = close(ustconsumer64_data.err_sock); | |
507 | if (ret < 0) { | |
a76cbd9f | 508 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
509 | } |
510 | } | |
511 | if (kconsumer_data.cmd_sock >= 0) { | |
512 | ret = close(kconsumer_data.cmd_sock); | |
513 | if (ret < 0) { | |
514 | PERROR("kernel consumer cmd_sock close"); | |
515 | } | |
516 | } | |
517 | if (ustconsumer32_data.cmd_sock >= 0) { | |
518 | ret = close(ustconsumer32_data.cmd_sock); | |
519 | if (ret < 0) { | |
a76cbd9f | 520 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
521 | } |
522 | } | |
523 | if (ustconsumer64_data.cmd_sock >= 0) { | |
524 | ret = close(ustconsumer64_data.cmd_sock); | |
525 | if (ret < 0) { | |
a76cbd9f | 526 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
527 | } |
528 | } | |
529 | } | |
530 | ||
c9cb3e7d JG |
531 | /* |
532 | * Generate the full lock file path using the rundir. | |
533 | * | |
534 | * Return the snprintf() return value thus a negative value is an error. | |
535 | */ | |
536 | static int generate_lock_file_path(char *path, size_t len) | |
537 | { | |
538 | int ret; | |
539 | ||
540 | assert(path); | |
541 | assert(rundir); | |
542 | ||
543 | /* Build lockfile path from rundir. */ | |
544 | ret = snprintf(path, len, "%s/" DEFAULT_LTTNG_SESSIOND_LOCKFILE, rundir); | |
545 | if (ret < 0) { | |
546 | PERROR("snprintf lockfile path"); | |
547 | } | |
548 | ||
549 | return ret; | |
550 | } | |
551 | ||
4e4714cb JR |
552 | /* |
553 | * Wait on consumer process termination. | |
554 | * | |
555 | * Need to be called with the consumer data lock held or from a context | |
556 | * ensuring no concurrent access to data (e.g: cleanup). | |
557 | */ | |
558 | static void wait_consumer(struct consumer_data *consumer_data) | |
559 | { | |
560 | pid_t ret; | |
561 | int status; | |
562 | ||
563 | if (consumer_data->pid <= 0) { | |
564 | return; | |
565 | } | |
566 | ||
567 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
568 | consumer_data->pid); | |
569 | ret = waitpid(consumer_data->pid, &status, 0); | |
570 | if (ret == -1) { | |
571 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
572 | } | |
573 | if (!WIFEXITED(status)) { | |
574 | ERR("consumerd termination with error: %d", | |
575 | WEXITSTATUS(ret)); | |
576 | } | |
577 | consumer_data->pid = 0; | |
578 | } | |
579 | ||
fac6795d | 580 | /* |
4a15001e | 581 | * Cleanup the session daemon's data structures. |
fac6795d | 582 | */ |
4a15001e | 583 | static void sessiond_cleanup(void) |
fac6795d | 584 | { |
ef599319 | 585 | int ret; |
af9737e9 | 586 | struct ltt_session *sess, *stmp; |
8c6c56c2 | 587 | char path[PATH_MAX]; |
fac6795d | 588 | |
4a15001e | 589 | DBG("Cleanup sessiond"); |
e07ae692 | 590 | |
4e449f3f MD |
591 | /* |
592 | * Close the thread quit pipe. It has already done its job, | |
593 | * since we are now called. | |
594 | */ | |
2f77fc4b DG |
595 | utils_close_pipe(thread_quit_pipe); |
596 | ||
35f90c40 DG |
597 | /* |
598 | * If opt_pidfile is undefined, the default file will be wiped when | |
599 | * removing the rundir. | |
600 | */ | |
601 | if (opt_pidfile) { | |
602 | ret = remove(opt_pidfile); | |
603 | if (ret < 0) { | |
604 | PERROR("remove pidfile %s", opt_pidfile); | |
605 | } | |
606 | } | |
607 | ||
8c6c56c2 MD |
608 | DBG("Removing sessiond and consumerd content of directory %s", rundir); |
609 | ||
610 | /* sessiond */ | |
611 | snprintf(path, PATH_MAX, | |
612 | "%s/%s", | |
613 | rundir, DEFAULT_LTTNG_SESSIOND_PIDFILE); | |
614 | DBG("Removing %s", path); | |
615 | (void) unlink(path); | |
616 | ||
cd9290dd | 617 | snprintf(path, PATH_MAX, "%s/%s", rundir, |
022d91ba | 618 | DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE); |
cd9290dd DG |
619 | DBG("Removing %s", path); |
620 | (void) unlink(path); | |
621 | ||
8c6c56c2 MD |
622 | /* kconsumerd */ |
623 | snprintf(path, PATH_MAX, | |
624 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, | |
625 | rundir); | |
626 | DBG("Removing %s", path); | |
627 | (void) unlink(path); | |
628 | ||
629 | snprintf(path, PATH_MAX, | |
630 | DEFAULT_KCONSUMERD_PATH, | |
631 | rundir); | |
632 | DBG("Removing directory %s", path); | |
633 | (void) rmdir(path); | |
634 | ||
635 | /* ust consumerd 32 */ | |
636 | snprintf(path, PATH_MAX, | |
637 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, | |
638 | rundir); | |
639 | DBG("Removing %s", path); | |
640 | (void) unlink(path); | |
641 | ||
642 | snprintf(path, PATH_MAX, | |
643 | DEFAULT_USTCONSUMERD32_PATH, | |
644 | rundir); | |
645 | DBG("Removing directory %s", path); | |
646 | (void) rmdir(path); | |
647 | ||
648 | /* ust consumerd 64 */ | |
649 | snprintf(path, PATH_MAX, | |
650 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, | |
651 | rundir); | |
652 | DBG("Removing %s", path); | |
653 | (void) unlink(path); | |
654 | ||
655 | snprintf(path, PATH_MAX, | |
656 | DEFAULT_USTCONSUMERD64_PATH, | |
657 | rundir); | |
658 | DBG("Removing directory %s", path); | |
659 | (void) rmdir(path); | |
5461b305 | 660 | |
99bab54f | 661 | DBG("Cleaning up all sessions"); |
fac6795d | 662 | |
b5541356 | 663 | /* Destroy session list mutex */ |
273ea72c DG |
664 | if (session_list_ptr != NULL) { |
665 | pthread_mutex_destroy(&session_list_ptr->lock); | |
666 | ||
667 | /* Cleanup ALL session */ | |
54d01ffb DG |
668 | cds_list_for_each_entry_safe(sess, stmp, |
669 | &session_list_ptr->head, list) { | |
2f77fc4b | 670 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
671 | } |
672 | } | |
673 | ||
4e4714cb JR |
674 | wait_consumer(&kconsumer_data); |
675 | wait_consumer(&ustconsumer64_data); | |
676 | wait_consumer(&ustconsumer32_data); | |
677 | ||
6a4e4039 JG |
678 | DBG("Cleaning up all agent apps"); |
679 | agent_app_ht_clean(); | |
680 | ||
099e26bd | 681 | DBG("Closing all UST sockets"); |
56fff090 | 682 | ust_app_clean_list(); |
7972aab2 | 683 | buffer_reg_destroy_registries(); |
099e26bd | 684 | |
4fba7219 DG |
685 | if (is_root && !opt_no_kernel) { |
686 | DBG2("Closing kernel fd"); | |
a4b35e07 | 687 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
688 | ret = close(kernel_tracer_fd); |
689 | if (ret) { | |
690 | PERROR("close"); | |
691 | } | |
a4b35e07 | 692 | } |
2f50c8a3 | 693 | DBG("Unloading kernel modules"); |
096102bd | 694 | modprobe_remove_lttng_all(); |
834978fd | 695 | free(syscall_table); |
2f50c8a3 | 696 | } |
2f77fc4b | 697 | |
e975f9f8 DG |
698 | close_consumer_sockets(); |
699 | ||
ef367a93 JG |
700 | if (load_info) { |
701 | load_session_destroy_data(load_info); | |
702 | free(load_info); | |
703 | } | |
704 | ||
de27ada2 JG |
705 | if (notification_thread_data) { |
706 | notification_destroy_data(notification_thread_data); | |
707 | } | |
708 | ||
c9cb3e7d JG |
709 | /* |
710 | * Cleanup lock file by deleting it and finaly closing it which will | |
711 | * release the file system lock. | |
712 | */ | |
713 | if (lockfile_fd >= 0) { | |
714 | char lockfile_path[PATH_MAX]; | |
715 | ||
4a15001e MD |
716 | ret = generate_lock_file_path(lockfile_path, |
717 | sizeof(lockfile_path)); | |
c9cb3e7d JG |
718 | if (ret > 0) { |
719 | ret = remove(lockfile_path); | |
720 | if (ret < 0) { | |
721 | PERROR("remove lock file"); | |
722 | } | |
723 | ret = close(lockfile_fd); | |
724 | if (ret < 0) { | |
725 | PERROR("close lock file"); | |
726 | } | |
727 | } | |
728 | } | |
729 | ||
730 | /* | |
731 | * We do NOT rmdir rundir because there are other processes | |
732 | * using it, for instance lttng-relayd, which can start in | |
733 | * parallel with this teardown. | |
734 | */ | |
735 | ||
736 | free(rundir); | |
4a15001e MD |
737 | } |
738 | ||
739 | /* | |
740 | * Cleanup the daemon's option data structures. | |
741 | */ | |
742 | static void sessiond_cleanup_options(void) | |
743 | { | |
744 | DBG("Cleaning up options"); | |
745 | ||
746 | /* | |
747 | * If the override option is set, the pointer points to a *non* const | |
748 | * thus freeing it even though the variable type is set to const. | |
749 | */ | |
750 | if (tracing_group_name_override) { | |
751 | free((void *) tracing_group_name); | |
752 | } | |
753 | if (consumerd32_bin_override) { | |
754 | free((void *) consumerd32_bin); | |
755 | } | |
756 | if (consumerd64_bin_override) { | |
757 | free((void *) consumerd64_bin); | |
758 | } | |
759 | if (consumerd32_libdir_override) { | |
760 | free((void *) consumerd32_libdir); | |
761 | } | |
762 | if (consumerd64_libdir_override) { | |
763 | free((void *) consumerd64_libdir); | |
764 | } | |
765 | ||
766 | free(opt_pidfile); | |
767 | free(opt_load_session_path); | |
768 | free(kmod_probes_list); | |
769 | free(kmod_extra_probes_list); | |
c9cb3e7d | 770 | |
7567352f | 771 | run_as_destroy_worker(); |
fac6795d DG |
772 | } |
773 | ||
e065084a | 774 | /* |
d063d709 | 775 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 776 | * |
d063d709 | 777 | * Return lttcomm error code. |
e065084a DG |
778 | */ |
779 | static int send_unix_sock(int sock, void *buf, size_t len) | |
780 | { | |
781 | /* Check valid length */ | |
c617c0c6 | 782 | if (len == 0) { |
e065084a DG |
783 | return -1; |
784 | } | |
785 | ||
786 | return lttcomm_send_unix_sock(sock, buf, len); | |
787 | } | |
788 | ||
5461b305 | 789 | /* |
d063d709 | 790 | * Free memory of a command context structure. |
5461b305 | 791 | */ |
a2fb29a5 | 792 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 793 | { |
a2fb29a5 DG |
794 | DBG("Clean command context structure"); |
795 | if (*cmd_ctx) { | |
796 | if ((*cmd_ctx)->llm) { | |
797 | free((*cmd_ctx)->llm); | |
5461b305 | 798 | } |
a2fb29a5 DG |
799 | if ((*cmd_ctx)->lsm) { |
800 | free((*cmd_ctx)->lsm); | |
5461b305 | 801 | } |
a2fb29a5 DG |
802 | free(*cmd_ctx); |
803 | *cmd_ctx = NULL; | |
5461b305 DG |
804 | } |
805 | } | |
806 | ||
fac6795d | 807 | /* |
0fdd1e2c | 808 | * Notify UST applications using the shm mmap futex. |
fac6795d | 809 | */ |
0fdd1e2c | 810 | static int notify_ust_apps(int active) |
fac6795d | 811 | { |
0fdd1e2c | 812 | char *wait_shm_mmap; |
fac6795d | 813 | |
0fdd1e2c | 814 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 815 | |
0fdd1e2c DG |
816 | /* See shm.c for this call implying mmap, shm and futex calls */ |
817 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
818 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
819 | goto error; |
820 | } | |
821 | ||
0fdd1e2c DG |
822 | /* Wake waiting process */ |
823 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
824 | ||
825 | /* Apps notified successfully */ | |
826 | return 0; | |
fac6795d DG |
827 | |
828 | error: | |
0fdd1e2c | 829 | return -1; |
fac6795d DG |
830 | } |
831 | ||
e065084a | 832 | /* |
d063d709 DG |
833 | * Setup the outgoing data buffer for the response (llm) by allocating the |
834 | * right amount of memory and copying the original information from the lsm | |
835 | * structure. | |
ca95a216 | 836 | * |
6e10c9b9 | 837 | * Return 0 on success, negative value on error. |
ca95a216 | 838 | */ |
6e10c9b9 PP |
839 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, |
840 | const void *payload_buf, size_t payload_len, | |
841 | const void *cmd_header_buf, size_t cmd_header_len) | |
ca95a216 | 842 | { |
6e10c9b9 PP |
843 | int ret = 0; |
844 | const size_t header_len = sizeof(struct lttcomm_lttng_msg); | |
845 | const size_t cmd_header_offset = header_len; | |
846 | const size_t payload_offset = cmd_header_offset + cmd_header_len; | |
847 | const size_t total_msg_size = header_len + cmd_header_len + payload_len; | |
ca95a216 | 848 | |
6e10c9b9 | 849 | cmd_ctx->llm = zmalloc(total_msg_size); |
5461b305 | 850 | |
5461b305 | 851 | if (cmd_ctx->llm == NULL) { |
76d7553f | 852 | PERROR("zmalloc"); |
5461b305 | 853 | ret = -ENOMEM; |
6e10c9b9 | 854 | goto end; |
ca95a216 DG |
855 | } |
856 | ||
5461b305 DG |
857 | /* Copy common data */ |
858 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 859 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
6e10c9b9 PP |
860 | cmd_ctx->llm->cmd_header_size = cmd_header_len; |
861 | cmd_ctx->llm->data_size = payload_len; | |
862 | cmd_ctx->lttng_msg_size = total_msg_size; | |
5461b305 | 863 | |
6e10c9b9 | 864 | /* Copy command header */ |
b4e3ceb9 PP |
865 | if (cmd_header_len) { |
866 | memcpy(((uint8_t *) cmd_ctx->llm) + cmd_header_offset, cmd_header_buf, | |
867 | cmd_header_len); | |
868 | } | |
5461b305 | 869 | |
6e10c9b9 | 870 | /* Copy payload */ |
b4e3ceb9 PP |
871 | if (payload_len) { |
872 | memcpy(((uint8_t *) cmd_ctx->llm) + payload_offset, payload_buf, | |
873 | payload_len); | |
874 | } | |
ca95a216 | 875 | |
6e10c9b9 | 876 | end: |
ca95a216 DG |
877 | return ret; |
878 | } | |
879 | ||
6e10c9b9 PP |
880 | /* |
881 | * Version of setup_lttng_msg() without command header. | |
882 | */ | |
883 | static int setup_lttng_msg_no_cmd_header(struct command_ctx *cmd_ctx, | |
884 | void *payload_buf, size_t payload_len) | |
885 | { | |
886 | return setup_lttng_msg(cmd_ctx, payload_buf, payload_len, NULL, 0); | |
887 | } | |
7a485870 | 888 | /* |
5eb91c98 | 889 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 890 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 891 | */ |
5eb91c98 | 892 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 893 | { |
5eb91c98 | 894 | int ret; |
7a485870 DG |
895 | struct ltt_session *session; |
896 | struct ltt_kernel_channel *channel; | |
897 | ||
5eb91c98 | 898 | DBG("Updating kernel poll set"); |
7a485870 | 899 | |
54d01ffb | 900 | session_lock_list(); |
b5541356 | 901 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 902 | session_lock(session); |
7a485870 | 903 | if (session->kernel_session == NULL) { |
54d01ffb | 904 | session_unlock(session); |
7a485870 DG |
905 | continue; |
906 | } | |
7a485870 | 907 | |
54d01ffb DG |
908 | cds_list_for_each_entry(channel, |
909 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
910 | /* Add channel fd to the kernel poll set */ |
911 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
912 | if (ret < 0) { | |
54d01ffb | 913 | session_unlock(session); |
5eb91c98 DG |
914 | goto error; |
915 | } | |
916 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 917 | } |
54d01ffb | 918 | session_unlock(session); |
7a485870 | 919 | } |
54d01ffb | 920 | session_unlock_list(); |
7a485870 | 921 | |
5eb91c98 | 922 | return 0; |
7a485870 DG |
923 | |
924 | error: | |
54d01ffb | 925 | session_unlock_list(); |
7a485870 DG |
926 | return -1; |
927 | } | |
928 | ||
929 | /* | |
54d01ffb | 930 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 931 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 932 | * |
d063d709 | 933 | * Useful for CPU hotplug feature. |
7a485870 | 934 | */ |
2bdd86d4 | 935 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
936 | { |
937 | int ret = 0; | |
938 | struct ltt_session *session; | |
173af62f | 939 | struct ltt_kernel_session *ksess; |
7a485870 DG |
940 | struct ltt_kernel_channel *channel; |
941 | ||
942 | DBG("Updating kernel streams for channel fd %d", fd); | |
943 | ||
54d01ffb | 944 | session_lock_list(); |
b5541356 | 945 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 946 | session_lock(session); |
7a485870 | 947 | if (session->kernel_session == NULL) { |
54d01ffb | 948 | session_unlock(session); |
7a485870 DG |
949 | continue; |
950 | } | |
173af62f | 951 | ksess = session->kernel_session; |
d9800920 | 952 | |
4a15001e MD |
953 | cds_list_for_each_entry(channel, |
954 | &ksess->channel_list.head, list) { | |
955 | struct lttng_ht_iter iter; | |
956 | struct consumer_socket *socket; | |
d9800920 | 957 | |
4a15001e MD |
958 | if (channel->fd != fd) { |
959 | continue; | |
960 | } | |
961 | DBG("Channel found, updating kernel streams"); | |
962 | ret = kernel_open_channel_stream(channel); | |
963 | if (ret < 0) { | |
964 | goto error; | |
965 | } | |
966 | /* Update the stream global counter */ | |
967 | ksess->stream_count_global += ret; | |
968 | ||
969 | /* | |
970 | * Have we already sent fds to the consumer? If yes, it | |
971 | * means that tracing is started so it is safe to send | |
972 | * our updated stream fds. | |
973 | */ | |
974 | if (ksess->consumer_fds_sent != 1 | |
975 | || ksess->consumer == NULL) { | |
976 | ret = -1; | |
977 | goto error; | |
978 | } | |
979 | ||
980 | rcu_read_lock(); | |
981 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
982 | &iter.iter, socket, node.node) { | |
983 | pthread_mutex_lock(socket->lock); | |
984 | ret = kernel_consumer_send_channel_stream(socket, | |
985 | channel, ksess, | |
986 | session->output_traces ? 1 : 0); | |
987 | pthread_mutex_unlock(socket->lock); | |
988 | if (ret < 0) { | |
e7fe706f | 989 | rcu_read_unlock(); |
4a15001e | 990 | goto error; |
7a485870 | 991 | } |
7a485870 | 992 | } |
4a15001e | 993 | rcu_read_unlock(); |
7a485870 | 994 | } |
54d01ffb | 995 | session_unlock(session); |
7a485870 | 996 | } |
54d01ffb | 997 | session_unlock_list(); |
b3c750d2 | 998 | return ret; |
7a485870 | 999 | |
b3c750d2 | 1000 | error: |
54d01ffb DG |
1001 | session_unlock(session); |
1002 | session_unlock_list(); | |
7a485870 DG |
1003 | return ret; |
1004 | } | |
1005 | ||
487cf67c | 1006 | /* |
ffe60014 DG |
1007 | * For each tracing session, update newly registered apps. The session list |
1008 | * lock MUST be acquired before calling this. | |
487cf67c DG |
1009 | */ |
1010 | static void update_ust_app(int app_sock) | |
1011 | { | |
1012 | struct ltt_session *sess, *stmp; | |
1013 | ||
fdadac08 DG |
1014 | /* Consumer is in an ERROR state. Stop any application update. */ |
1015 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
1016 | /* Stop the update process since the consumer is dead. */ | |
1017 | return; | |
1018 | } | |
1019 | ||
487cf67c DG |
1020 | /* For all tracing session(s) */ |
1021 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
a9ad0c8f MD |
1022 | struct ust_app *app; |
1023 | ||
4ee14516 | 1024 | session_lock(sess); |
a9ad0c8f MD |
1025 | if (!sess->ust_session) { |
1026 | goto unlock_session; | |
1027 | } | |
1028 | ||
1029 | rcu_read_lock(); | |
1030 | assert(app_sock >= 0); | |
1031 | app = ust_app_find_by_sock(app_sock); | |
1032 | if (app == NULL) { | |
1033 | /* | |
1034 | * Application can be unregistered before so | |
1035 | * this is possible hence simply stopping the | |
1036 | * update. | |
1037 | */ | |
1038 | DBG3("UST app update failed to find app sock %d", | |
1039 | app_sock); | |
1040 | goto unlock_rcu; | |
421cb601 | 1041 | } |
a9ad0c8f MD |
1042 | ust_app_global_update(sess->ust_session, app); |
1043 | unlock_rcu: | |
1044 | rcu_read_unlock(); | |
1045 | unlock_session: | |
4ee14516 | 1046 | session_unlock(sess); |
487cf67c DG |
1047 | } |
1048 | } | |
1049 | ||
7a485870 | 1050 | /* |
d063d709 | 1051 | * This thread manage event coming from the kernel. |
7a485870 | 1052 | * |
d063d709 DG |
1053 | * Features supported in this thread: |
1054 | * -) CPU Hotplug | |
7a485870 DG |
1055 | */ |
1056 | static void *thread_manage_kernel(void *data) | |
1057 | { | |
139ac872 | 1058 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 1059 | uint32_t revents, nb_fd; |
7a485870 | 1060 | char tmp; |
5eb91c98 | 1061 | struct lttng_poll_event events; |
7a485870 | 1062 | |
6993eeb3 | 1063 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 1064 | |
6c71277b | 1065 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 1066 | |
d5d63bf1 DG |
1067 | /* |
1068 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 1069 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 1070 | */ |
6d737ce4 | 1071 | lttng_poll_init(&events); |
d5d63bf1 | 1072 | |
e547b070 | 1073 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
1074 | goto error_testpoint; |
1075 | } | |
8ac94142 | 1076 | |
840cb59c | 1077 | health_code_update(); |
44a5e5eb | 1078 | |
e547b070 | 1079 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 1080 | goto error_testpoint; |
6993eeb3 CB |
1081 | } |
1082 | ||
7a485870 | 1083 | while (1) { |
840cb59c | 1084 | health_code_update(); |
44a5e5eb | 1085 | |
7a485870 | 1086 | if (update_poll_flag == 1) { |
d21b0d71 DG |
1087 | /* Clean events object. We are about to populate it again. */ |
1088 | lttng_poll_clean(&events); | |
1089 | ||
d0b96690 | 1090 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
1091 | if (ret < 0) { |
1092 | goto error_poll_create; | |
1093 | } | |
1094 | ||
1095 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
1096 | if (ret < 0) { | |
1097 | goto error; | |
1098 | } | |
5f822d0a | 1099 | |
d21b0d71 | 1100 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
1101 | ret = update_kernel_poll(&events); |
1102 | if (ret < 0) { | |
7a485870 DG |
1103 | goto error; |
1104 | } | |
1105 | update_poll_flag = 0; | |
1106 | } | |
1107 | ||
7fa2082e | 1108 | DBG("Thread kernel polling"); |
7a485870 DG |
1109 | |
1110 | /* Poll infinite value of time */ | |
88f2b785 | 1111 | restart: |
a78af745 | 1112 | health_poll_entry(); |
5eb91c98 | 1113 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1114 | DBG("Thread kernel return from poll on %d fds", |
1115 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1116 | health_poll_exit(); |
7a485870 | 1117 | if (ret < 0) { |
88f2b785 MD |
1118 | /* |
1119 | * Restart interrupted system call. | |
1120 | */ | |
1121 | if (errno == EINTR) { | |
1122 | goto restart; | |
1123 | } | |
7a485870 DG |
1124 | goto error; |
1125 | } else if (ret == 0) { | |
1126 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
1127 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
1128 | "This should not have happened! Continuing..."); | |
7a485870 DG |
1129 | continue; |
1130 | } | |
1131 | ||
0d9c5d77 DG |
1132 | nb_fd = ret; |
1133 | ||
5eb91c98 DG |
1134 | for (i = 0; i < nb_fd; i++) { |
1135 | /* Fetch once the poll data */ | |
1136 | revents = LTTNG_POLL_GETEV(&events, i); | |
1137 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 1138 | |
840cb59c | 1139 | health_code_update(); |
44a5e5eb | 1140 | |
fd20dac9 MD |
1141 | if (!revents) { |
1142 | /* No activity for this FD (poll implementation). */ | |
1143 | continue; | |
1144 | } | |
1145 | ||
5eb91c98 | 1146 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1147 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1148 | if (ret) { |
139ac872 MD |
1149 | err = 0; |
1150 | goto exit; | |
5eb91c98 | 1151 | } |
7a485870 | 1152 | |
5eb91c98 | 1153 | /* Check for data on kernel pipe */ |
03e43155 MD |
1154 | if (revents & LPOLLIN) { |
1155 | if (pollfd == kernel_poll_pipe[0]) { | |
1156 | (void) lttng_read(kernel_poll_pipe[0], | |
1157 | &tmp, 1); | |
1158 | /* | |
1159 | * Ret value is useless here, if this pipe gets any actions an | |
1160 | * update is required anyway. | |
1161 | */ | |
1162 | update_poll_flag = 1; | |
1163 | continue; | |
1164 | } else { | |
1165 | /* | |
1166 | * New CPU detected by the kernel. Adding kernel stream to | |
1167 | * kernel session and updating the kernel consumer | |
1168 | */ | |
2bdd86d4 | 1169 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
1170 | if (ret < 0) { |
1171 | continue; | |
1172 | } | |
1173 | break; | |
7a485870 | 1174 | } |
03e43155 MD |
1175 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1176 | update_poll_flag = 1; | |
1177 | continue; | |
1178 | } else { | |
1179 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1180 | goto error; | |
7a485870 DG |
1181 | } |
1182 | } | |
1183 | } | |
1184 | ||
139ac872 | 1185 | exit: |
7a485870 | 1186 | error: |
5eb91c98 | 1187 | lttng_poll_clean(&events); |
76d7553f | 1188 | error_poll_create: |
6993eeb3 | 1189 | error_testpoint: |
6620da75 DG |
1190 | utils_close_pipe(kernel_poll_pipe); |
1191 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 1192 | if (err) { |
840cb59c | 1193 | health_error(); |
139ac872 | 1194 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
1195 | WARN("Kernel thread died unexpectedly. " |
1196 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 1197 | } |
8782cc74 | 1198 | health_unregister(health_sessiond); |
76d7553f | 1199 | DBG("Kernel thread dying"); |
7a485870 DG |
1200 | return NULL; |
1201 | } | |
1202 | ||
a23ec3a7 DG |
1203 | /* |
1204 | * Signal pthread condition of the consumer data that the thread. | |
1205 | */ | |
1206 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
1207 | { | |
1208 | pthread_mutex_lock(&data->cond_mutex); | |
1209 | ||
1210 | /* | |
1211 | * The state is set before signaling. It can be any value, it's the waiter | |
1212 | * job to correctly interpret this condition variable associated to the | |
1213 | * consumer pthread_cond. | |
1214 | * | |
1215 | * A value of 0 means that the corresponding thread of the consumer data | |
1216 | * was not started. 1 indicates that the thread has started and is ready | |
1217 | * for action. A negative value means that there was an error during the | |
1218 | * thread bootstrap. | |
1219 | */ | |
1220 | data->consumer_thread_is_ready = state; | |
1221 | (void) pthread_cond_signal(&data->cond); | |
1222 | ||
1223 | pthread_mutex_unlock(&data->cond_mutex); | |
1224 | } | |
1225 | ||
1d4b027a | 1226 | /* |
3bd1e081 | 1227 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1228 | */ |
3bd1e081 | 1229 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1230 | { |
42fc1d0b | 1231 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 1232 | uint32_t revents, nb_fd; |
1d4b027a | 1233 | enum lttcomm_return_code code; |
5eb91c98 | 1234 | struct lttng_poll_event events; |
3bd1e081 | 1235 | struct consumer_data *consumer_data = data; |
1d4b027a | 1236 | |
3bd1e081 | 1237 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1238 | |
34c1e15a MD |
1239 | rcu_register_thread(); |
1240 | rcu_thread_online(); | |
1241 | ||
6c71277b | 1242 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1243 | |
855060f8 | 1244 | health_code_update(); |
9449cc75 | 1245 | |
5eb91c98 | 1246 | /* |
331744e3 JD |
1247 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1248 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1249 | */ |
331744e3 | 1250 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1251 | if (ret < 0) { |
76d7553f | 1252 | goto error_poll; |
5eb91c98 | 1253 | } |
273ea72c | 1254 | |
edb8b045 DG |
1255 | /* |
1256 | * The error socket here is already in a listening state which was done | |
1257 | * just before spawning this thread to avoid a race between the consumer | |
1258 | * daemon exec trying to connect and the listen() call. | |
1259 | */ | |
3bd1e081 | 1260 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1261 | if (ret < 0) { |
1262 | goto error; | |
1263 | } | |
1264 | ||
840cb59c | 1265 | health_code_update(); |
44a5e5eb | 1266 | |
331744e3 | 1267 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1268 | restart: |
a78af745 | 1269 | health_poll_entry(); |
8ac94142 | 1270 | |
e547b070 | 1271 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
1272 | goto error; |
1273 | } | |
8ac94142 | 1274 | |
5eb91c98 | 1275 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1276 | health_poll_exit(); |
273ea72c | 1277 | if (ret < 0) { |
88f2b785 MD |
1278 | /* |
1279 | * Restart interrupted system call. | |
1280 | */ | |
1281 | if (errno == EINTR) { | |
1282 | goto restart; | |
1283 | } | |
273ea72c DG |
1284 | goto error; |
1285 | } | |
1286 | ||
0d9c5d77 DG |
1287 | nb_fd = ret; |
1288 | ||
5eb91c98 DG |
1289 | for (i = 0; i < nb_fd; i++) { |
1290 | /* Fetch once the poll data */ | |
1291 | revents = LTTNG_POLL_GETEV(&events, i); | |
1292 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1293 | ||
840cb59c | 1294 | health_code_update(); |
44a5e5eb | 1295 | |
fd20dac9 MD |
1296 | if (!revents) { |
1297 | /* No activity for this FD (poll implementation). */ | |
1298 | continue; | |
1299 | } | |
1300 | ||
5eb91c98 | 1301 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1302 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1303 | if (ret) { |
139ac872 MD |
1304 | err = 0; |
1305 | goto exit; | |
5eb91c98 DG |
1306 | } |
1307 | ||
1308 | /* Event on the registration socket */ | |
3bd1e081 | 1309 | if (pollfd == consumer_data->err_sock) { |
03e43155 MD |
1310 | if (revents & LPOLLIN) { |
1311 | continue; | |
1312 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1313 | ERR("consumer err socket poll error"); |
5eb91c98 | 1314 | goto error; |
03e43155 MD |
1315 | } else { |
1316 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1317 | goto error; | |
5eb91c98 DG |
1318 | } |
1319 | } | |
273ea72c DG |
1320 | } |
1321 | ||
3bd1e081 | 1322 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1323 | if (sock < 0) { |
1324 | goto error; | |
1325 | } | |
1326 | ||
b662582b DG |
1327 | /* |
1328 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1329 | * show must go on. | |
1330 | */ | |
1331 | (void) utils_set_fd_cloexec(sock); | |
1332 | ||
840cb59c | 1333 | health_code_update(); |
44a5e5eb | 1334 | |
3bd1e081 | 1335 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1336 | |
712ea556 | 1337 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1338 | ret = lttcomm_recv_unix_sock(sock, &code, |
1339 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1340 | if (ret <= 0) { |
1341 | goto error; | |
1342 | } | |
1343 | ||
840cb59c | 1344 | health_code_update(); |
f73fabfd | 1345 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
331744e3 | 1346 | /* Connect both socket, command and metadata. */ |
3bd1e081 MD |
1347 | consumer_data->cmd_sock = |
1348 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
4ce514c4 | 1349 | consumer_data->metadata_fd = |
331744e3 | 1350 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); |
92db7cdc DG |
1351 | if (consumer_data->cmd_sock < 0 |
1352 | || consumer_data->metadata_fd < 0) { | |
331744e3 | 1353 | PERROR("consumer connect cmd socket"); |
a23ec3a7 DG |
1354 | /* On error, signal condition and quit. */ |
1355 | signal_consumer_condition(consumer_data, -1); | |
1d4b027a DG |
1356 | goto error; |
1357 | } | |
9363801e | 1358 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; |
331744e3 JD |
1359 | /* Create metadata socket lock. */ |
1360 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1361 | if (consumer_data->metadata_sock.lock == NULL) { | |
1362 | PERROR("zmalloc pthread mutex"); | |
331744e3 JD |
1363 | goto error; |
1364 | } | |
1365 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1366 | ||
a23ec3a7 | 1367 | signal_consumer_condition(consumer_data, 1); |
331744e3 JD |
1368 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); |
1369 | DBG("Consumer metadata socket ready (fd: %d)", | |
4ce514c4 | 1370 | consumer_data->metadata_fd); |
1d4b027a | 1371 | } else { |
3bd1e081 | 1372 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1373 | lttcomm_get_readable_code(-code)); |
1374 | goto error; | |
1375 | } | |
1376 | ||
331744e3 | 1377 | /* Remove the consumerd error sock since we've established a connexion */ |
3bd1e081 | 1378 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1379 | if (ret < 0) { |
72079cae DG |
1380 | goto error; |
1381 | } | |
1382 | ||
331744e3 | 1383 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1384 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1385 | if (ret < 0) { | |
72079cae | 1386 | goto error; |
5eb91c98 DG |
1387 | } |
1388 | ||
331744e3 | 1389 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1390 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1391 | LPOLLIN | LPOLLRDHUP); |
1392 | if (ret < 0) { | |
1393 | goto error; | |
1394 | } | |
1395 | ||
840cb59c | 1396 | health_code_update(); |
44a5e5eb | 1397 | |
331744e3 | 1398 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1399 | restart_poll: |
331744e3 | 1400 | while (1) { |
42fc1d0b DG |
1401 | health_code_update(); |
1402 | ||
1403 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
1404 | if (should_quit) { | |
1405 | /* Not a health error. */ | |
1406 | err = 0; | |
1407 | goto exit; | |
1408 | } | |
1409 | ||
331744e3 JD |
1410 | health_poll_entry(); |
1411 | ret = lttng_poll_wait(&events, -1); | |
1412 | health_poll_exit(); | |
1413 | if (ret < 0) { | |
1414 | /* | |
1415 | * Restart interrupted system call. | |
1416 | */ | |
1417 | if (errno == EINTR) { | |
1418 | goto restart_poll; | |
1419 | } | |
1420 | goto error; | |
88f2b785 | 1421 | } |
72079cae | 1422 | |
331744e3 | 1423 | nb_fd = ret; |
0d9c5d77 | 1424 | |
331744e3 JD |
1425 | for (i = 0; i < nb_fd; i++) { |
1426 | /* Fetch once the poll data */ | |
1427 | revents = LTTNG_POLL_GETEV(&events, i); | |
1428 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1429 | |
331744e3 | 1430 | health_code_update(); |
44a5e5eb | 1431 | |
fd20dac9 MD |
1432 | if (!revents) { |
1433 | /* No activity for this FD (poll implementation). */ | |
1434 | continue; | |
1435 | } | |
1436 | ||
42fc1d0b DG |
1437 | /* |
1438 | * Thread quit pipe has been triggered, flag that we should stop | |
1439 | * but continue the current loop to handle potential data from | |
1440 | * consumer. | |
1441 | */ | |
1442 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 1443 | |
331744e3 JD |
1444 | if (pollfd == sock) { |
1445 | /* Event on the consumerd socket */ | |
03e43155 MD |
1446 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1447 | && !(revents & LPOLLIN)) { | |
331744e3 JD |
1448 | ERR("consumer err socket second poll error"); |
1449 | goto error; | |
1450 | } | |
1451 | health_code_update(); | |
1452 | /* Wait for any kconsumerd error */ | |
1453 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1454 | sizeof(enum lttcomm_return_code)); | |
1455 | if (ret <= 0) { | |
1456 | ERR("consumer closed the command socket"); | |
1457 | goto error; | |
1458 | } | |
1459 | ||
1460 | ERR("consumer return code : %s", | |
1461 | lttcomm_get_readable_code(-code)); | |
1462 | ||
1463 | goto exit; | |
4ce514c4 | 1464 | } else if (pollfd == consumer_data->metadata_fd) { |
03e43155 MD |
1465 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1466 | && !(revents & LPOLLIN)) { | |
1467 | ERR("consumer err metadata socket second poll error"); | |
1468 | goto error; | |
1469 | } | |
331744e3 JD |
1470 | /* UST metadata requests */ |
1471 | ret = ust_consumer_metadata_request( | |
1472 | &consumer_data->metadata_sock); | |
1473 | if (ret < 0) { | |
1474 | ERR("Handling metadata request"); | |
1475 | goto error; | |
1476 | } | |
5eb91c98 | 1477 | } |
42fc1d0b | 1478 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 1479 | } |
331744e3 | 1480 | health_code_update(); |
5eb91c98 DG |
1481 | } |
1482 | ||
139ac872 | 1483 | exit: |
1d4b027a | 1484 | error: |
fdadac08 DG |
1485 | /* |
1486 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1487 | * thread might be using them so get exclusive access which will abort all |
1488 | * other consumer command by other threads. | |
fdadac08 DG |
1489 | */ |
1490 | pthread_mutex_lock(&consumer_data->lock); | |
1491 | ||
5c827ce0 DG |
1492 | /* Immediately set the consumerd state to stopped */ |
1493 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1494 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1495 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1496 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1497 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1498 | } else { | |
1499 | /* Code flow error... */ | |
1500 | assert(0); | |
1501 | } | |
1502 | ||
76d7553f MD |
1503 | if (consumer_data->err_sock >= 0) { |
1504 | ret = close(consumer_data->err_sock); | |
1505 | if (ret) { | |
1506 | PERROR("close"); | |
1507 | } | |
a76cbd9f | 1508 | consumer_data->err_sock = -1; |
76d7553f MD |
1509 | } |
1510 | if (consumer_data->cmd_sock >= 0) { | |
1511 | ret = close(consumer_data->cmd_sock); | |
1512 | if (ret) { | |
1513 | PERROR("close"); | |
1514 | } | |
a76cbd9f | 1515 | consumer_data->cmd_sock = -1; |
76d7553f | 1516 | } |
96544455 SS |
1517 | if (consumer_data->metadata_sock.fd_ptr && |
1518 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1519 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1520 | if (ret) { |
1521 | PERROR("close"); | |
1522 | } | |
1523 | } | |
76d7553f MD |
1524 | if (sock >= 0) { |
1525 | ret = close(sock); | |
1526 | if (ret) { | |
1527 | PERROR("close"); | |
1528 | } | |
1529 | } | |
273ea72c | 1530 | |
3bd1e081 MD |
1531 | unlink(consumer_data->err_unix_sock_path); |
1532 | unlink(consumer_data->cmd_unix_sock_path); | |
fdadac08 | 1533 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1534 | |
fdadac08 | 1535 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1536 | if (consumer_data->metadata_sock.lock) { |
1537 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1538 | free(consumer_data->metadata_sock.lock); | |
1539 | } | |
5eb91c98 | 1540 | lttng_poll_clean(&events); |
76d7553f | 1541 | error_poll: |
139ac872 | 1542 | if (err) { |
840cb59c | 1543 | health_error(); |
139ac872 MD |
1544 | ERR("Health error occurred in %s", __func__); |
1545 | } | |
8782cc74 | 1546 | health_unregister(health_sessiond); |
76d7553f | 1547 | DBG("consumer thread cleanup completed"); |
0177d773 | 1548 | |
34c1e15a MD |
1549 | rcu_thread_offline(); |
1550 | rcu_unregister_thread(); | |
1551 | ||
5eb91c98 | 1552 | return NULL; |
099e26bd DG |
1553 | } |
1554 | ||
099e26bd DG |
1555 | /* |
1556 | * This thread manage application communication. | |
1d4b027a DG |
1557 | */ |
1558 | static void *thread_manage_apps(void *data) | |
099e26bd | 1559 | { |
139ac872 | 1560 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1561 | ssize_t size_ret; |
5eb91c98 | 1562 | uint32_t revents, nb_fd; |
5eb91c98 | 1563 | struct lttng_poll_event events; |
099e26bd DG |
1564 | |
1565 | DBG("[thread] Manage application started"); | |
1566 | ||
f6a9efaa DG |
1567 | rcu_register_thread(); |
1568 | rcu_thread_online(); | |
1569 | ||
6c71277b | 1570 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1571 | |
e547b070 | 1572 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1573 | goto error_testpoint; |
1574 | } | |
1575 | ||
840cb59c | 1576 | health_code_update(); |
44a5e5eb | 1577 | |
d0b96690 | 1578 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1579 | if (ret < 0) { |
76d7553f | 1580 | goto error_poll_create; |
5eb91c98 | 1581 | } |
099e26bd | 1582 | |
5eb91c98 DG |
1583 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1584 | if (ret < 0) { | |
1585 | goto error; | |
1586 | } | |
099e26bd | 1587 | |
e547b070 | 1588 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1589 | goto error; |
1590 | } | |
8ac94142 | 1591 | |
840cb59c | 1592 | health_code_update(); |
44a5e5eb | 1593 | |
5eb91c98 | 1594 | while (1) { |
7fa2082e | 1595 | DBG("Apps thread polling"); |
099e26bd DG |
1596 | |
1597 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1598 | restart: |
a78af745 | 1599 | health_poll_entry(); |
5eb91c98 | 1600 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1601 | DBG("Apps thread return from poll on %d fds", |
1602 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1603 | health_poll_exit(); |
099e26bd | 1604 | if (ret < 0) { |
88f2b785 MD |
1605 | /* |
1606 | * Restart interrupted system call. | |
1607 | */ | |
1608 | if (errno == EINTR) { | |
1609 | goto restart; | |
1610 | } | |
099e26bd DG |
1611 | goto error; |
1612 | } | |
1613 | ||
0d9c5d77 DG |
1614 | nb_fd = ret; |
1615 | ||
5eb91c98 DG |
1616 | for (i = 0; i < nb_fd; i++) { |
1617 | /* Fetch once the poll data */ | |
1618 | revents = LTTNG_POLL_GETEV(&events, i); | |
1619 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1620 | ||
840cb59c | 1621 | health_code_update(); |
44a5e5eb | 1622 | |
fd20dac9 MD |
1623 | if (!revents) { |
1624 | /* No activity for this FD (poll implementation). */ | |
1625 | continue; | |
1626 | } | |
1627 | ||
5eb91c98 | 1628 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1629 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1630 | if (ret) { |
139ac872 MD |
1631 | err = 0; |
1632 | goto exit; | |
5eb91c98 | 1633 | } |
099e26bd | 1634 | |
5eb91c98 DG |
1635 | /* Inspect the apps cmd pipe */ |
1636 | if (pollfd == apps_cmd_pipe[0]) { | |
03e43155 | 1637 | if (revents & LPOLLIN) { |
d0b96690 DG |
1638 | int sock; |
1639 | ||
5eb91c98 | 1640 | /* Empty pipe */ |
6cd525e8 MD |
1641 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1642 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1643 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1644 | goto error; |
1645 | } | |
099e26bd | 1646 | |
840cb59c | 1647 | health_code_update(); |
44a5e5eb | 1648 | |
ffe60014 | 1649 | /* |
03e43155 MD |
1650 | * Since this is a command socket (write then read), |
1651 | * we only monitor the error events of the socket. | |
ffe60014 | 1652 | */ |
d0b96690 DG |
1653 | ret = lttng_poll_add(&events, sock, |
1654 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1655 | if (ret < 0) { | |
5eb91c98 | 1656 | goto error; |
e0c7ec2b | 1657 | } |
acc7b41b | 1658 | |
d0b96690 | 1659 | DBG("Apps with sock %d added to poll set", sock); |
03e43155 MD |
1660 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1661 | ERR("Apps command pipe error"); | |
1662 | goto error; | |
1663 | } else { | |
1664 | ERR("Unknown poll events %u for sock %d", revents, pollfd); | |
1665 | goto error; | |
0177d773 | 1666 | } |
5eb91c98 DG |
1667 | } else { |
1668 | /* | |
54d01ffb DG |
1669 | * At this point, we know that a registered application made |
1670 | * the event at poll_wait. | |
5eb91c98 DG |
1671 | */ |
1672 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1673 | /* Removing from the poll set */ | |
1674 | ret = lttng_poll_del(&events, pollfd); | |
1675 | if (ret < 0) { | |
1676 | goto error; | |
1677 | } | |
099e26bd | 1678 | |
b9d9b220 | 1679 | /* Socket closed on remote end. */ |
56fff090 | 1680 | ust_app_unregister(pollfd); |
03e43155 MD |
1681 | } else { |
1682 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1683 | goto error; | |
5eb91c98 | 1684 | } |
099e26bd | 1685 | } |
44a5e5eb | 1686 | |
840cb59c | 1687 | health_code_update(); |
099e26bd | 1688 | } |
099e26bd DG |
1689 | } |
1690 | ||
139ac872 | 1691 | exit: |
099e26bd | 1692 | error: |
5eb91c98 | 1693 | lttng_poll_clean(&events); |
76d7553f | 1694 | error_poll_create: |
6993eeb3 | 1695 | error_testpoint: |
6620da75 DG |
1696 | utils_close_pipe(apps_cmd_pipe); |
1697 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1698 | ||
1699 | /* | |
1700 | * We don't clean the UST app hash table here since already registered | |
1701 | * applications can still be controlled so let them be until the session | |
1702 | * daemon dies or the applications stop. | |
1703 | */ | |
1704 | ||
139ac872 | 1705 | if (err) { |
840cb59c | 1706 | health_error(); |
139ac872 MD |
1707 | ERR("Health error occurred in %s", __func__); |
1708 | } | |
8782cc74 | 1709 | health_unregister(health_sessiond); |
76d7553f | 1710 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1711 | rcu_thread_offline(); |
1712 | rcu_unregister_thread(); | |
099e26bd DG |
1713 | return NULL; |
1714 | } | |
1715 | ||
d0b96690 | 1716 | /* |
d88aee68 DG |
1717 | * Send a socket to a thread This is called from the dispatch UST registration |
1718 | * thread once all sockets are set for the application. | |
d0b96690 | 1719 | * |
b85dc84c DG |
1720 | * The sock value can be invalid, we don't really care, the thread will handle |
1721 | * it and make the necessary cleanup if so. | |
1722 | * | |
d0b96690 DG |
1723 | * On success, return 0 else a negative value being the errno message of the |
1724 | * write(). | |
1725 | */ | |
d88aee68 | 1726 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1727 | { |
6cd525e8 | 1728 | ssize_t ret; |
d0b96690 | 1729 | |
b85dc84c DG |
1730 | /* |
1731 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1732 | * before calling this function being a shutdown state of the thread. | |
1733 | */ | |
1734 | if (fd < 0) { | |
1735 | ret = -EBADF; | |
1736 | goto error; | |
1737 | } | |
d0b96690 | 1738 | |
6cd525e8 MD |
1739 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1740 | if (ret < sizeof(sock)) { | |
d88aee68 | 1741 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1742 | if (ret < 0) { |
1743 | ret = -errno; | |
1744 | } | |
1745 | goto error; | |
1746 | } | |
1747 | ||
1748 | /* All good. Don't send back the write positive ret value. */ | |
1749 | ret = 0; | |
1750 | error: | |
6cd525e8 | 1751 | return (int) ret; |
d0b96690 DG |
1752 | } |
1753 | ||
f45e313d DG |
1754 | /* |
1755 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1756 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1757 | * notify socket is never received. | |
1758 | */ | |
1759 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1760 | { | |
1761 | int ret, nb_fd = 0, i; | |
1762 | unsigned int fd_added = 0; | |
1763 | struct lttng_poll_event events; | |
1764 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1765 | ||
1766 | assert(wait_queue); | |
1767 | ||
1768 | lttng_poll_init(&events); | |
1769 | ||
1770 | /* Just skip everything for an empty queue. */ | |
1771 | if (!wait_queue->count) { | |
1772 | goto end; | |
1773 | } | |
1774 | ||
1775 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1776 | if (ret < 0) { | |
1777 | goto error_create; | |
1778 | } | |
1779 | ||
1780 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1781 | &wait_queue->head, head) { | |
1782 | assert(wait_node->app); | |
1783 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1784 | LPOLLHUP | LPOLLERR); | |
1785 | if (ret < 0) { | |
1786 | goto error; | |
1787 | } | |
1788 | ||
1789 | fd_added = 1; | |
1790 | } | |
1791 | ||
1792 | if (!fd_added) { | |
1793 | goto end; | |
1794 | } | |
1795 | ||
1796 | /* | |
1797 | * Poll but don't block so we can quickly identify the faulty events and | |
1798 | * clean them afterwards from the wait queue. | |
1799 | */ | |
1800 | ret = lttng_poll_wait(&events, 0); | |
1801 | if (ret < 0) { | |
1802 | goto error; | |
1803 | } | |
1804 | nb_fd = ret; | |
1805 | ||
1806 | for (i = 0; i < nb_fd; i++) { | |
1807 | /* Get faulty FD. */ | |
1808 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1809 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1810 | ||
fd20dac9 MD |
1811 | if (!revents) { |
1812 | /* No activity for this FD (poll implementation). */ | |
1813 | continue; | |
1814 | } | |
1815 | ||
f45e313d DG |
1816 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1817 | &wait_queue->head, head) { | |
1818 | if (pollfd == wait_node->app->sock && | |
1819 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1820 | cds_list_del(&wait_node->head); | |
1821 | wait_queue->count--; | |
1822 | ust_app_destroy(wait_node->app); | |
1823 | free(wait_node); | |
48b40bcf JG |
1824 | /* |
1825 | * Silence warning of use-after-free in | |
1826 | * cds_list_for_each_entry_safe which uses | |
1827 | * __typeof__(*wait_node). | |
1828 | */ | |
1829 | wait_node = NULL; | |
f45e313d | 1830 | break; |
03e43155 MD |
1831 | } else { |
1832 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1833 | goto error; | |
f45e313d DG |
1834 | } |
1835 | } | |
1836 | } | |
1837 | ||
1838 | if (nb_fd > 0) { | |
1839 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1840 | } | |
1841 | ||
1842 | end: | |
1843 | lttng_poll_clean(&events); | |
1844 | return; | |
1845 | ||
1846 | error: | |
1847 | lttng_poll_clean(&events); | |
1848 | error_create: | |
1849 | ERR("Unable to sanitize wait queue"); | |
1850 | return; | |
1851 | } | |
1852 | ||
099e26bd DG |
1853 | /* |
1854 | * Dispatch request from the registration threads to the application | |
1855 | * communication thread. | |
1856 | */ | |
1857 | static void *thread_dispatch_ust_registration(void *data) | |
1858 | { | |
12e2b881 | 1859 | int ret, err = -1; |
8bdee6e2 | 1860 | struct cds_wfcq_node *node; |
099e26bd | 1861 | struct ust_command *ust_cmd = NULL; |
f45e313d DG |
1862 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1863 | struct ust_reg_wait_queue wait_queue = { | |
1864 | .count = 0, | |
1865 | }; | |
d0b96690 | 1866 | |
967e3668 MD |
1867 | rcu_register_thread(); |
1868 | ||
6c71277b | 1869 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1870 | |
9ad42ec1 MD |
1871 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1872 | goto error_testpoint; | |
1873 | } | |
1874 | ||
12e2b881 MD |
1875 | health_code_update(); |
1876 | ||
f45e313d | 1877 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1878 | |
1879 | DBG("[thread] Dispatch UST command started"); | |
1880 | ||
26c9d55e | 1881 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
12e2b881 MD |
1882 | health_code_update(); |
1883 | ||
099e26bd DG |
1884 | /* Atomically prepare the queue futex */ |
1885 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1886 | ||
1887 | do { | |
d0b96690 | 1888 | struct ust_app *app = NULL; |
7972aab2 | 1889 | ust_cmd = NULL; |
d0b96690 | 1890 | |
f45e313d DG |
1891 | /* |
1892 | * Make sure we don't have node(s) that have hung up before receiving | |
1893 | * the notify socket. This is to clean the list in order to avoid | |
1894 | * memory leaks from notify socket that are never seen. | |
1895 | */ | |
1896 | sanitize_wait_queue(&wait_queue); | |
1897 | ||
12e2b881 | 1898 | health_code_update(); |
099e26bd | 1899 | /* Dequeue command for registration */ |
8bdee6e2 | 1900 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1901 | if (node == NULL) { |
00a17c97 | 1902 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1903 | /* Continue thread execution */ |
1904 | break; | |
1905 | } | |
1906 | ||
1907 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1908 | ||
2f50c8a3 DG |
1909 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1910 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1911 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1912 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1913 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1914 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1915 | |
1916 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1917 | wait_node = zmalloc(sizeof(*wait_node)); | |
1918 | if (!wait_node) { | |
1919 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1920 | ret = close(ust_cmd->sock); |
1921 | if (ret < 0) { | |
1922 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1923 | } | |
51dec90d | 1924 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1925 | free(ust_cmd); |
d0b96690 DG |
1926 | goto error; |
1927 | } | |
1928 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1929 | ||
1930 | /* Create application object if socket is CMD. */ | |
1931 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1932 | ust_cmd->sock); | |
1933 | if (!wait_node->app) { | |
1934 | ret = close(ust_cmd->sock); | |
1935 | if (ret < 0) { | |
1936 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1937 | } |
51dec90d | 1938 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1939 | free(wait_node); |
7972aab2 | 1940 | free(ust_cmd); |
d0b96690 DG |
1941 | continue; |
1942 | } | |
1943 | /* | |
1944 | * Add application to the wait queue so we can set the notify | |
1945 | * socket before putting this object in the global ht. | |
1946 | */ | |
f45e313d DG |
1947 | cds_list_add(&wait_node->head, &wait_queue.head); |
1948 | wait_queue.count++; | |
d0b96690 | 1949 | |
7972aab2 | 1950 | free(ust_cmd); |
d0b96690 DG |
1951 | /* |
1952 | * We have to continue here since we don't have the notify | |
1953 | * socket and the application MUST be added to the hash table | |
1954 | * only at that moment. | |
1955 | */ | |
1956 | continue; | |
1957 | } else { | |
1958 | /* | |
1959 | * Look for the application in the local wait queue and set the | |
1960 | * notify socket if found. | |
1961 | */ | |
d88aee68 | 1962 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1963 | &wait_queue.head, head) { |
12e2b881 | 1964 | health_code_update(); |
d0b96690 DG |
1965 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1966 | wait_node->app->notify_sock = ust_cmd->sock; | |
1967 | cds_list_del(&wait_node->head); | |
f45e313d | 1968 | wait_queue.count--; |
d0b96690 DG |
1969 | app = wait_node->app; |
1970 | free(wait_node); | |
1971 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1972 | break; | |
1973 | } | |
1974 | } | |
020d7f60 DG |
1975 | |
1976 | /* | |
1977 | * With no application at this stage the received socket is | |
1978 | * basically useless so close it before we free the cmd data | |
1979 | * structure for good. | |
1980 | */ | |
1981 | if (!app) { | |
1982 | ret = close(ust_cmd->sock); | |
1983 | if (ret < 0) { | |
1984 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1985 | } | |
51dec90d | 1986 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1987 | } |
7972aab2 | 1988 | free(ust_cmd); |
d0b96690 DG |
1989 | } |
1990 | ||
1991 | if (app) { | |
d0b96690 DG |
1992 | /* |
1993 | * @session_lock_list | |
1994 | * | |
1995 | * Lock the global session list so from the register up to the | |
1996 | * registration done message, no thread can see the application | |
1997 | * and change its state. | |
1998 | */ | |
1999 | session_lock_list(); | |
2000 | rcu_read_lock(); | |
d88aee68 | 2001 | |
d0b96690 DG |
2002 | /* |
2003 | * Add application to the global hash table. This needs to be | |
2004 | * done before the update to the UST registry can locate the | |
2005 | * application. | |
2006 | */ | |
2007 | ust_app_add(app); | |
d88aee68 DG |
2008 | |
2009 | /* Set app version. This call will print an error if needed. */ | |
2010 | (void) ust_app_version(app); | |
2011 | ||
2012 | /* Send notify socket through the notify pipe. */ | |
2013 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
2014 | app->notify_sock); | |
2015 | if (ret < 0) { | |
2016 | rcu_read_unlock(); | |
2017 | session_unlock_list(); | |
b85dc84c DG |
2018 | /* |
2019 | * No notify thread, stop the UST tracing. However, this is | |
2020 | * not an internal error of the this thread thus setting | |
2021 | * the health error code to a normal exit. | |
2022 | */ | |
2023 | err = 0; | |
d88aee68 | 2024 | goto error; |
6620da75 | 2025 | } |
d88aee68 | 2026 | |
d0b96690 DG |
2027 | /* |
2028 | * Update newly registered application with the tracing | |
2029 | * registry info already enabled information. | |
2030 | */ | |
2031 | update_ust_app(app->sock); | |
d88aee68 DG |
2032 | |
2033 | /* | |
2034 | * Don't care about return value. Let the manage apps threads | |
2035 | * handle app unregistration upon socket close. | |
2036 | */ | |
fb45065e | 2037 | (void) ust_app_register_done(app); |
d88aee68 DG |
2038 | |
2039 | /* | |
2040 | * Even if the application socket has been closed, send the app | |
2041 | * to the thread and unregistration will take place at that | |
2042 | * place. | |
2043 | */ | |
2044 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 2045 | if (ret < 0) { |
d88aee68 DG |
2046 | rcu_read_unlock(); |
2047 | session_unlock_list(); | |
b85dc84c DG |
2048 | /* |
2049 | * No apps. thread, stop the UST tracing. However, this is | |
2050 | * not an internal error of the this thread thus setting | |
2051 | * the health error code to a normal exit. | |
2052 | */ | |
2053 | err = 0; | |
d88aee68 | 2054 | goto error; |
d0b96690 | 2055 | } |
d88aee68 | 2056 | |
d0b96690 DG |
2057 | rcu_read_unlock(); |
2058 | session_unlock_list(); | |
099e26bd | 2059 | } |
099e26bd DG |
2060 | } while (node != NULL); |
2061 | ||
12e2b881 | 2062 | health_poll_entry(); |
099e26bd DG |
2063 | /* Futex wait on queue. Blocking call on futex() */ |
2064 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 2065 | health_poll_exit(); |
099e26bd | 2066 | } |
12e2b881 MD |
2067 | /* Normal exit, no error */ |
2068 | err = 0; | |
099e26bd DG |
2069 | |
2070 | error: | |
d88aee68 DG |
2071 | /* Clean up wait queue. */ |
2072 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 2073 | &wait_queue.head, head) { |
d88aee68 | 2074 | cds_list_del(&wait_node->head); |
f45e313d | 2075 | wait_queue.count--; |
d88aee68 DG |
2076 | free(wait_node); |
2077 | } | |
2078 | ||
772b8f4d MD |
2079 | /* Empty command queue. */ |
2080 | for (;;) { | |
2081 | /* Dequeue command for registration */ | |
2082 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); | |
2083 | if (node == NULL) { | |
2084 | break; | |
2085 | } | |
2086 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
2087 | ret = close(ust_cmd->sock); | |
2088 | if (ret < 0) { | |
2089 | PERROR("close ust sock exit dispatch %d", ust_cmd->sock); | |
2090 | } | |
2091 | lttng_fd_put(LTTNG_FD_APPS, 1); | |
2092 | free(ust_cmd); | |
2093 | } | |
2094 | ||
9ad42ec1 | 2095 | error_testpoint: |
099e26bd | 2096 | DBG("Dispatch thread dying"); |
12e2b881 MD |
2097 | if (err) { |
2098 | health_error(); | |
2099 | ERR("Health error occurred in %s", __func__); | |
2100 | } | |
8782cc74 | 2101 | health_unregister(health_sessiond); |
967e3668 | 2102 | rcu_unregister_thread(); |
099e26bd DG |
2103 | return NULL; |
2104 | } | |
2105 | ||
2106 | /* | |
2107 | * This thread manage application registration. | |
2108 | */ | |
2109 | static void *thread_registration_apps(void *data) | |
1d4b027a | 2110 | { |
139ac872 | 2111 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
2112 | uint32_t revents, nb_fd; |
2113 | struct lttng_poll_event events; | |
099e26bd DG |
2114 | /* |
2115 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
2116 | * freed in the manage apps thread. | |
2117 | */ | |
2118 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 2119 | |
099e26bd | 2120 | DBG("[thread] Manage application registration started"); |
1d4b027a | 2121 | |
6c71277b | 2122 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 2123 | |
e547b070 | 2124 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
2125 | goto error_testpoint; |
2126 | } | |
8ac94142 | 2127 | |
1d4b027a DG |
2128 | ret = lttcomm_listen_unix_sock(apps_sock); |
2129 | if (ret < 0) { | |
76d7553f | 2130 | goto error_listen; |
1d4b027a DG |
2131 | } |
2132 | ||
5eb91c98 DG |
2133 | /* |
2134 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
2135 | * more will be added to this poll set. | |
2136 | */ | |
d0b96690 | 2137 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 2138 | if (ret < 0) { |
76d7553f | 2139 | goto error_create_poll; |
5eb91c98 | 2140 | } |
273ea72c | 2141 | |
5eb91c98 DG |
2142 | /* Add the application registration socket */ |
2143 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
2144 | if (ret < 0) { | |
76d7553f | 2145 | goto error_poll_add; |
5eb91c98 | 2146 | } |
273ea72c | 2147 | |
1d4b027a | 2148 | /* Notify all applications to register */ |
0fdd1e2c DG |
2149 | ret = notify_ust_apps(1); |
2150 | if (ret < 0) { | |
2151 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
2152 | "Execution continues but there might be problem for already\n" |
2153 | "running applications that wishes to register."); | |
0fdd1e2c | 2154 | } |
1d4b027a DG |
2155 | |
2156 | while (1) { | |
2157 | DBG("Accepting application registration"); | |
273ea72c DG |
2158 | |
2159 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 2160 | restart: |
a78af745 | 2161 | health_poll_entry(); |
5eb91c98 | 2162 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 2163 | health_poll_exit(); |
273ea72c | 2164 | if (ret < 0) { |
88f2b785 MD |
2165 | /* |
2166 | * Restart interrupted system call. | |
2167 | */ | |
2168 | if (errno == EINTR) { | |
2169 | goto restart; | |
2170 | } | |
273ea72c DG |
2171 | goto error; |
2172 | } | |
2173 | ||
0d9c5d77 DG |
2174 | nb_fd = ret; |
2175 | ||
5eb91c98 | 2176 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 2177 | health_code_update(); |
139ac872 | 2178 | |
5eb91c98 DG |
2179 | /* Fetch once the poll data */ |
2180 | revents = LTTNG_POLL_GETEV(&events, i); | |
2181 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 2182 | |
fd20dac9 MD |
2183 | if (!revents) { |
2184 | /* No activity for this FD (poll implementation). */ | |
2185 | continue; | |
2186 | } | |
2187 | ||
5eb91c98 | 2188 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 2189 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 2190 | if (ret) { |
139ac872 MD |
2191 | err = 0; |
2192 | goto exit; | |
90014c57 | 2193 | } |
1d4b027a | 2194 | |
5eb91c98 DG |
2195 | /* Event on the registration socket */ |
2196 | if (pollfd == apps_sock) { | |
03e43155 | 2197 | if (revents & LPOLLIN) { |
5eb91c98 DG |
2198 | sock = lttcomm_accept_unix_sock(apps_sock); |
2199 | if (sock < 0) { | |
2200 | goto error; | |
2201 | } | |
099e26bd | 2202 | |
16c5c8fa DG |
2203 | /* |
2204 | * Set socket timeout for both receiving and ending. | |
2205 | * app_socket_timeout is in seconds, whereas | |
2206 | * lttcomm_setsockopt_rcv_timeout and | |
2207 | * lttcomm_setsockopt_snd_timeout expect msec as | |
2208 | * parameter. | |
2209 | */ | |
28ce0ff2 JG |
2210 | if (app_socket_timeout >= 0) { |
2211 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
2212 | app_socket_timeout * 1000); | |
2213 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
2214 | app_socket_timeout * 1000); | |
2215 | } | |
16c5c8fa | 2216 | |
b662582b DG |
2217 | /* |
2218 | * Set the CLOEXEC flag. Return code is useless because | |
2219 | * either way, the show must go on. | |
2220 | */ | |
2221 | (void) utils_set_fd_cloexec(sock); | |
2222 | ||
5eb91c98 | 2223 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 2224 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 2225 | if (ust_cmd == NULL) { |
76d7553f | 2226 | PERROR("ust command zmalloc"); |
41ed8e47 MD |
2227 | ret = close(sock); |
2228 | if (ret) { | |
2229 | PERROR("close"); | |
2230 | } | |
5eb91c98 DG |
2231 | goto error; |
2232 | } | |
1d4b027a | 2233 | |
5eb91c98 DG |
2234 | /* |
2235 | * Using message-based transmissions to ensure we don't | |
2236 | * have to deal with partially received messages. | |
2237 | */ | |
4063050c MD |
2238 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
2239 | if (ret < 0) { | |
2240 | ERR("Exhausted file descriptors allowed for applications."); | |
2241 | free(ust_cmd); | |
2242 | ret = close(sock); | |
2243 | if (ret) { | |
2244 | PERROR("close"); | |
2245 | } | |
2246 | sock = -1; | |
2247 | continue; | |
2248 | } | |
d88aee68 | 2249 | |
840cb59c | 2250 | health_code_update(); |
d0b96690 DG |
2251 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
2252 | if (ret < 0) { | |
5eb91c98 | 2253 | free(ust_cmd); |
d0b96690 | 2254 | /* Close socket of the application. */ |
76d7553f MD |
2255 | ret = close(sock); |
2256 | if (ret) { | |
2257 | PERROR("close"); | |
2258 | } | |
4063050c | 2259 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 2260 | sock = -1; |
5eb91c98 DG |
2261 | continue; |
2262 | } | |
840cb59c | 2263 | health_code_update(); |
099e26bd | 2264 | |
5eb91c98 | 2265 | ust_cmd->sock = sock; |
34a2494f | 2266 | sock = -1; |
099e26bd | 2267 | |
5eb91c98 DG |
2268 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2269 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2270 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2271 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2272 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2273 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2274 | |
5eb91c98 DG |
2275 | /* |
2276 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2277 | * has been taken! This apps will be part of the *system*. |
5eb91c98 | 2278 | */ |
8bdee6e2 | 2279 | cds_wfcq_enqueue(&ust_cmd_queue.head, &ust_cmd_queue.tail, &ust_cmd->node); |
5eb91c98 DG |
2280 | |
2281 | /* | |
2282 | * Wake the registration queue futex. Implicit memory | |
8bdee6e2 | 2283 | * barrier with the exchange in cds_wfcq_enqueue. |
5eb91c98 DG |
2284 | */ |
2285 | futex_nto1_wake(&ust_cmd_queue.futex); | |
03e43155 MD |
2286 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2287 | ERR("Register apps socket poll error"); | |
2288 | goto error; | |
2289 | } else { | |
2290 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2291 | goto error; | |
5eb91c98 DG |
2292 | } |
2293 | } | |
90014c57 | 2294 | } |
1d4b027a DG |
2295 | } |
2296 | ||
139ac872 | 2297 | exit: |
1d4b027a | 2298 | error: |
0fdd1e2c DG |
2299 | /* Notify that the registration thread is gone */ |
2300 | notify_ust_apps(0); | |
2301 | ||
a4b35e07 | 2302 | if (apps_sock >= 0) { |
76d7553f MD |
2303 | ret = close(apps_sock); |
2304 | if (ret) { | |
2305 | PERROR("close"); | |
2306 | } | |
a4b35e07 | 2307 | } |
46c3f085 | 2308 | if (sock >= 0) { |
76d7553f MD |
2309 | ret = close(sock); |
2310 | if (ret) { | |
2311 | PERROR("close"); | |
2312 | } | |
4063050c | 2313 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2314 | } |
273ea72c | 2315 | unlink(apps_unix_sock_path); |
0fdd1e2c | 2316 | |
76d7553f | 2317 | error_poll_add: |
5eb91c98 | 2318 | lttng_poll_clean(&events); |
76d7553f MD |
2319 | error_listen: |
2320 | error_create_poll: | |
6993eeb3 | 2321 | error_testpoint: |
76d7553f | 2322 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2323 | if (err) { |
2324 | health_error(); | |
2325 | ERR("Health error occurred in %s", __func__); | |
2326 | } | |
8782cc74 | 2327 | health_unregister(health_sessiond); |
5eb91c98 | 2328 | |
1d4b027a DG |
2329 | return NULL; |
2330 | } | |
2331 | ||
8c0faa1d | 2332 | /* |
3bd1e081 | 2333 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2334 | * exec or it will fails. |
8c0faa1d | 2335 | */ |
3bd1e081 | 2336 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2337 | { |
a23ec3a7 | 2338 | int ret, clock_ret; |
ee0b0061 DG |
2339 | struct timespec timeout; |
2340 | ||
13a7bce3 JG |
2341 | /* |
2342 | * Make sure we set the readiness flag to 0 because we are NOT ready. | |
2343 | * This access to consumer_thread_is_ready does not need to be | |
2344 | * protected by consumer_data.cond_mutex (yet) since the consumer | |
2345 | * management thread has not been started at this point. | |
2346 | */ | |
a23ec3a7 | 2347 | consumer_data->consumer_thread_is_ready = 0; |
8c0faa1d | 2348 | |
a23ec3a7 DG |
2349 | /* Setup pthread condition */ |
2350 | ret = pthread_condattr_init(&consumer_data->condattr); | |
4a15001e | 2351 | if (ret) { |
a23ec3a7 DG |
2352 | errno = ret; |
2353 | PERROR("pthread_condattr_init consumer data"); | |
2354 | goto error; | |
2355 | } | |
2356 | ||
2357 | /* | |
2358 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2359 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2360 | * for a more details and how we noticed it. | |
2361 | */ | |
2362 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
4a15001e | 2363 | if (ret) { |
a23ec3a7 DG |
2364 | errno = ret; |
2365 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2366 | goto error; |
2367 | } | |
8c0faa1d | 2368 | |
a23ec3a7 | 2369 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
4a15001e | 2370 | if (ret) { |
a23ec3a7 DG |
2371 | errno = ret; |
2372 | PERROR("pthread_cond_init consumer data"); | |
2373 | goto error; | |
2374 | } | |
2375 | ||
1a1a34b4 MJ |
2376 | ret = pthread_create(&consumer_data->thread, default_pthread_attr(), |
2377 | thread_manage_consumer, consumer_data); | |
4a15001e MD |
2378 | if (ret) { |
2379 | errno = ret; | |
3bd1e081 | 2380 | PERROR("pthread_create consumer"); |
ee0b0061 | 2381 | ret = -1; |
8c0faa1d DG |
2382 | goto error; |
2383 | } | |
2384 | ||
a23ec3a7 DG |
2385 | /* We are about to wait on a pthread condition */ |
2386 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2387 | ||
ee0b0061 | 2388 | /* Get time for sem_timedwait absolute timeout */ |
389fbf04 | 2389 | clock_ret = lttng_clock_gettime(CLOCK_MONOTONIC, &timeout); |
a23ec3a7 DG |
2390 | /* |
2391 | * Set the timeout for the condition timed wait even if the clock gettime | |
2392 | * call fails since we might loop on that call and we want to avoid to | |
2393 | * increment the timeout too many times. | |
2394 | */ | |
2395 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2396 | ||
2397 | /* | |
2398 | * The following loop COULD be skipped in some conditions so this is why we | |
2399 | * set ret to 0 in order to make sure at least one round of the loop is | |
2400 | * done. | |
2401 | */ | |
2402 | ret = 0; | |
2403 | ||
2404 | /* | |
2405 | * Loop until the condition is reached or when a timeout is reached. Note | |
2406 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2407 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2408 | * possible. This loop does not take any chances and works with both of | |
2409 | * them. | |
2410 | */ | |
2411 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2412 | if (clock_ret < 0) { | |
2413 | PERROR("clock_gettime spawn consumer"); | |
2414 | /* Infinite wait for the consumerd thread to be ready */ | |
2415 | ret = pthread_cond_wait(&consumer_data->cond, | |
2416 | &consumer_data->cond_mutex); | |
2417 | } else { | |
2418 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2419 | &consumer_data->cond_mutex, &timeout); | |
2420 | } | |
ee0b0061 | 2421 | } |
8c0faa1d | 2422 | |
a23ec3a7 DG |
2423 | /* Release the pthread condition */ |
2424 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2425 | ||
2426 | if (ret != 0) { | |
2427 | errno = ret; | |
2428 | if (ret == ETIMEDOUT) { | |
4282f9a3 DG |
2429 | int pth_ret; |
2430 | ||
ee0b0061 DG |
2431 | /* |
2432 | * Call has timed out so we kill the kconsumerd_thread and return | |
2433 | * an error. | |
2434 | */ | |
a23ec3a7 DG |
2435 | ERR("Condition timed out. The consumer thread was never ready." |
2436 | " Killing it"); | |
4282f9a3 DG |
2437 | pth_ret = pthread_cancel(consumer_data->thread); |
2438 | if (pth_ret < 0) { | |
3bd1e081 | 2439 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2440 | } |
2441 | } else { | |
a23ec3a7 | 2442 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 | 2443 | } |
4282f9a3 DG |
2444 | /* Caller is expecting a negative value on failure. */ |
2445 | ret = -1; | |
ee0b0061 DG |
2446 | goto error; |
2447 | } | |
2448 | ||
3bd1e081 MD |
2449 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2450 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2451 | ERR("Consumerd did not start"); |
3bd1e081 | 2452 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2453 | goto error; |
2454 | } | |
3bd1e081 | 2455 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2456 | |
8c0faa1d DG |
2457 | return 0; |
2458 | ||
2459 | error: | |
2460 | return ret; | |
2461 | } | |
2462 | ||
d9800920 | 2463 | /* |
3bd1e081 | 2464 | * Join consumer thread |
d9800920 | 2465 | */ |
3bd1e081 | 2466 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2467 | { |
2468 | void *status; | |
cf3af59e | 2469 | |
e8209f6b DG |
2470 | /* Consumer pid must be a real one. */ |
2471 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2472 | int ret; |
3bd1e081 | 2473 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2474 | if (ret) { |
4a15001e | 2475 | PERROR("Error killing consumer daemon"); |
cf3af59e MD |
2476 | return ret; |
2477 | } | |
3bd1e081 | 2478 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2479 | } else { |
2480 | return 0; | |
2481 | } | |
2482 | } | |
2483 | ||
8c0faa1d | 2484 | /* |
3bd1e081 | 2485 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2486 | * |
d063d709 | 2487 | * Return pid if successful else -1. |
8c0faa1d | 2488 | */ |
3bd1e081 | 2489 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2490 | { |
2491 | int ret; | |
2492 | pid_t pid; | |
94c55f17 | 2493 | const char *consumer_to_use; |
53086306 | 2494 | const char *verbosity; |
94c55f17 | 2495 | struct stat st; |
8c0faa1d | 2496 | |
3bd1e081 | 2497 | DBG("Spawning consumerd"); |
c49dc785 | 2498 | |
8c0faa1d DG |
2499 | pid = fork(); |
2500 | if (pid == 0) { | |
2501 | /* | |
3bd1e081 | 2502 | * Exec consumerd. |
8c0faa1d | 2503 | */ |
daee5345 | 2504 | if (opt_verbose_consumer) { |
53086306 | 2505 | verbosity = "--verbose"; |
4421f712 | 2506 | } else if (lttng_opt_quiet) { |
53086306 | 2507 | verbosity = "--quiet"; |
4421f712 DG |
2508 | } else { |
2509 | verbosity = ""; | |
53086306 | 2510 | } |
4421f712 | 2511 | |
3bd1e081 MD |
2512 | switch (consumer_data->type) { |
2513 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2514 | /* |
c7704d57 DG |
2515 | * Find out which consumerd to execute. We will first try the |
2516 | * 64-bit path, then the sessiond's installation directory, and | |
2517 | * fallback on the 32-bit one, | |
94c55f17 | 2518 | */ |
63a799e8 AM |
2519 | DBG3("Looking for a kernel consumer at these locations:"); |
2520 | DBG3(" 1) %s", consumerd64_bin); | |
2521 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
2522 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 2523 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 2524 | DBG3("Found location #1"); |
94c55f17 | 2525 | consumer_to_use = consumerd64_bin; |
94c55f17 | 2526 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 2527 | DBG3("Found location #2"); |
94c55f17 | 2528 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 2529 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 2530 | DBG3("Found location #3"); |
eb1e0bd4 | 2531 | consumer_to_use = consumerd32_bin; |
94c55f17 | 2532 | } else { |
63a799e8 | 2533 | DBG("Could not find any valid consumerd executable"); |
4282f9a3 | 2534 | ret = -EINVAL; |
94c55f17 AM |
2535 | break; |
2536 | } | |
2537 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
4282f9a3 | 2538 | ret = execl(consumer_to_use, |
94c55f17 AM |
2539 | "lttng-consumerd", verbosity, "-k", |
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, |
94c55f17 | 2543 | NULL); |
3bd1e081 | 2544 | break; |
7753dea8 MD |
2545 | case LTTNG_CONSUMER64_UST: |
2546 | { | |
b1e0b6b6 | 2547 | char *tmpnew = NULL; |
8f4905da MD |
2548 | |
2549 | if (consumerd64_libdir[0] != '\0') { | |
2550 | char *tmp; | |
2551 | size_t tmplen; | |
2552 | ||
e8fa9fb0 | 2553 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2554 | if (!tmp) { |
2555 | tmp = ""; | |
2556 | } | |
2557 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2558 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
2559 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2560 | if (!tmpnew) { | |
2561 | ret = -ENOMEM; | |
2562 | goto error; | |
2563 | } | |
2564 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2565 | strcat(tmpnew, consumerd64_libdir); | |
2566 | if (tmp[0] != '\0') { | |
2567 | strcat(tmpnew, ":"); | |
2568 | strcat(tmpnew, tmp); | |
2569 | } | |
2570 | ret = putenv(tmpnew); | |
2571 | if (ret) { | |
2572 | ret = -errno; | |
c6f76da9 | 2573 | free(tmpnew); |
8f4905da MD |
2574 | goto error; |
2575 | } | |
2576 | } | |
94c55f17 | 2577 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 2578 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2579 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2580 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2581 | "--group", tracing_group_name, |
7753dea8 | 2582 | NULL); |
8f4905da MD |
2583 | if (consumerd64_libdir[0] != '\0') { |
2584 | free(tmpnew); | |
2585 | } | |
3bd1e081 | 2586 | break; |
7753dea8 MD |
2587 | } |
2588 | case LTTNG_CONSUMER32_UST: | |
2589 | { | |
937dde8e | 2590 | char *tmpnew = NULL; |
8f4905da MD |
2591 | |
2592 | if (consumerd32_libdir[0] != '\0') { | |
2593 | char *tmp; | |
2594 | size_t tmplen; | |
2595 | ||
e8fa9fb0 | 2596 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2597 | if (!tmp) { |
2598 | tmp = ""; | |
2599 | } | |
2600 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2601 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2602 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2603 | if (!tmpnew) { | |
2604 | ret = -ENOMEM; | |
2605 | goto error; | |
2606 | } | |
2607 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2608 | strcat(tmpnew, consumerd32_libdir); | |
2609 | if (tmp[0] != '\0') { | |
2610 | strcat(tmpnew, ":"); | |
2611 | strcat(tmpnew, tmp); | |
2612 | } | |
2613 | ret = putenv(tmpnew); | |
2614 | if (ret) { | |
2615 | ret = -errno; | |
c6f76da9 | 2616 | free(tmpnew); |
8f4905da MD |
2617 | goto error; |
2618 | } | |
2619 | } | |
94c55f17 | 2620 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 2621 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2622 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2623 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2624 | "--group", tracing_group_name, |
7753dea8 | 2625 | NULL); |
8f4905da MD |
2626 | if (consumerd32_libdir[0] != '\0') { |
2627 | free(tmpnew); | |
2628 | } | |
7753dea8 MD |
2629 | break; |
2630 | } | |
3bd1e081 | 2631 | default: |
76d7553f | 2632 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2633 | exit(EXIT_FAILURE); |
2634 | } | |
8c0faa1d | 2635 | if (errno != 0) { |
4282f9a3 | 2636 | PERROR("Consumer execl()"); |
8c0faa1d | 2637 | } |
4282f9a3 | 2638 | /* Reaching this point, we got a failure on our execl(). */ |
8c0faa1d DG |
2639 | exit(EXIT_FAILURE); |
2640 | } else if (pid > 0) { | |
2641 | ret = pid; | |
8c0faa1d | 2642 | } else { |
76d7553f | 2643 | PERROR("start consumer fork"); |
8c0faa1d | 2644 | ret = -errno; |
8c0faa1d | 2645 | } |
8f4905da | 2646 | error: |
8c0faa1d DG |
2647 | return ret; |
2648 | } | |
2649 | ||
693bd40b | 2650 | /* |
3bd1e081 | 2651 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2652 | */ |
3bd1e081 | 2653 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2654 | { |
c617c0c6 | 2655 | int ret; |
edb8b045 DG |
2656 | |
2657 | /* | |
2658 | * Set the listen() state on the socket since there is a possible race | |
2659 | * between the exec() of the consumer daemon and this call if place in the | |
2660 | * consumer thread. See bug #366 for more details. | |
2661 | */ | |
2662 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2663 | if (ret < 0) { | |
2664 | goto error; | |
2665 | } | |
693bd40b | 2666 | |
3bd1e081 MD |
2667 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2668 | if (consumer_data->pid != 0) { | |
2669 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2670 | goto end; |
2671 | } | |
693bd40b | 2672 | |
3bd1e081 | 2673 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2674 | if (ret < 0) { |
3bd1e081 MD |
2675 | ERR("Spawning consumerd failed"); |
2676 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2677 | goto error; |
693bd40b | 2678 | } |
c49dc785 | 2679 | |
3bd1e081 MD |
2680 | /* Setting up the consumer_data pid */ |
2681 | consumer_data->pid = ret; | |
48842b30 | 2682 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2683 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2684 | |
3bd1e081 MD |
2685 | DBG2("Spawning consumer control thread"); |
2686 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2687 | if (ret < 0) { |
3bd1e081 | 2688 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2689 | goto error; |
2690 | } | |
2691 | ||
c49dc785 | 2692 | end: |
693bd40b DG |
2693 | return 0; |
2694 | ||
2695 | error: | |
331744e3 | 2696 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2697 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2698 | int err; |
2699 | ||
edb8b045 DG |
2700 | err = close(consumer_data->err_sock); |
2701 | if (err < 0) { | |
2702 | PERROR("close consumer data error socket"); | |
2703 | } | |
2704 | } | |
693bd40b DG |
2705 | return ret; |
2706 | } | |
2707 | ||
b73401da | 2708 | /* |
096102bd | 2709 | * Setup necessary data for kernel tracer action. |
b73401da | 2710 | */ |
096102bd | 2711 | static int init_kernel_tracer(void) |
b73401da DG |
2712 | { |
2713 | int ret; | |
b73401da | 2714 | |
096102bd DG |
2715 | /* Modprobe lttng kernel modules */ |
2716 | ret = modprobe_lttng_control(); | |
b73401da | 2717 | if (ret < 0) { |
b73401da DG |
2718 | goto error; |
2719 | } | |
2720 | ||
096102bd DG |
2721 | /* Open debugfs lttng */ |
2722 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2723 | if (kernel_tracer_fd < 0) { | |
2724 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
2725 | ret = -1; |
2726 | goto error_open; | |
54d01ffb DG |
2727 | } |
2728 | ||
2f77fc4b DG |
2729 | /* Validate kernel version */ |
2730 | ret = kernel_validate_version(kernel_tracer_fd); | |
2731 | if (ret < 0) { | |
2732 | goto error_version; | |
b551a063 | 2733 | } |
54d01ffb | 2734 | |
2f77fc4b DG |
2735 | ret = modprobe_lttng_data(); |
2736 | if (ret < 0) { | |
2737 | goto error_modules; | |
54d01ffb DG |
2738 | } |
2739 | ||
2f77fc4b DG |
2740 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2741 | return 0; | |
2742 | ||
2743 | error_version: | |
2744 | modprobe_remove_lttng_control(); | |
2745 | ret = close(kernel_tracer_fd); | |
2746 | if (ret) { | |
2747 | PERROR("close"); | |
b551a063 | 2748 | } |
2f77fc4b | 2749 | kernel_tracer_fd = -1; |
f73fabfd | 2750 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2751 | |
2f77fc4b DG |
2752 | error_modules: |
2753 | ret = close(kernel_tracer_fd); | |
2754 | if (ret) { | |
2755 | PERROR("close"); | |
b551a063 | 2756 | } |
54d01ffb | 2757 | |
2f77fc4b DG |
2758 | error_open: |
2759 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2760 | |
2761 | error: | |
2f77fc4b DG |
2762 | WARN("No kernel tracer available"); |
2763 | kernel_tracer_fd = -1; | |
2764 | if (!is_root) { | |
f73fabfd | 2765 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2766 | } else { |
f73fabfd | 2767 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2768 | } |
54d01ffb DG |
2769 | } |
2770 | ||
2f77fc4b | 2771 | |
54d01ffb | 2772 | /* |
2f77fc4b DG |
2773 | * Copy consumer output from the tracing session to the domain session. The |
2774 | * function also applies the right modification on a per domain basis for the | |
2775 | * trace files destination directory. | |
36b588ed MD |
2776 | * |
2777 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2778 | */ |
2f77fc4b | 2779 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2780 | { |
2781 | int ret; | |
2f77fc4b DG |
2782 | const char *dir_name; |
2783 | struct consumer_output *consumer; | |
2784 | ||
2785 | assert(session); | |
2786 | assert(session->consumer); | |
54d01ffb | 2787 | |
b551a063 DG |
2788 | switch (domain) { |
2789 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2790 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2791 | /* |
2792 | * XXX: We should audit the session creation and what this function | |
2793 | * does "extra" in order to avoid a destroy since this function is used | |
2794 | * in the domain session creation (kernel and ust) only. Same for UST | |
2795 | * domain. | |
2796 | */ | |
2797 | if (session->kernel_session->consumer) { | |
6addfa37 | 2798 | consumer_output_put(session->kernel_session->consumer); |
09a90bcd | 2799 | } |
2f77fc4b DG |
2800 | session->kernel_session->consumer = |
2801 | consumer_copy_output(session->consumer); | |
2802 | /* Ease our life a bit for the next part */ | |
2803 | consumer = session->kernel_session->consumer; | |
2804 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2805 | break; |
f20baf8e | 2806 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2807 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2808 | case LTTNG_DOMAIN_PYTHON: |
b551a063 | 2809 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2810 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd | 2811 | if (session->ust_session->consumer) { |
6addfa37 | 2812 | consumer_output_put(session->ust_session->consumer); |
09a90bcd | 2813 | } |
2f77fc4b DG |
2814 | session->ust_session->consumer = |
2815 | consumer_copy_output(session->consumer); | |
2816 | /* Ease our life a bit for the next part */ | |
2817 | consumer = session->ust_session->consumer; | |
2818 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2819 | break; |
2820 | default: | |
f73fabfd | 2821 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2822 | goto error; |
2823 | } | |
2824 | ||
2f77fc4b | 2825 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2826 | strncat(consumer->subdir, dir_name, |
2827 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2828 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2829 | ||
f73fabfd | 2830 | ret = LTTNG_OK; |
54d01ffb DG |
2831 | |
2832 | error: | |
2833 | return ret; | |
2834 | } | |
2835 | ||
00e2e675 | 2836 | /* |
2f77fc4b | 2837 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2838 | * |
2839 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2840 | */ |
2f77fc4b DG |
2841 | static int create_ust_session(struct ltt_session *session, |
2842 | struct lttng_domain *domain) | |
00e2e675 DG |
2843 | { |
2844 | int ret; | |
2f77fc4b | 2845 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2846 | |
a4b92340 | 2847 | assert(session); |
2f77fc4b DG |
2848 | assert(domain); |
2849 | assert(session->consumer); | |
a4b92340 | 2850 | |
2f77fc4b | 2851 | switch (domain->type) { |
f20baf8e | 2852 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2853 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2854 | case LTTNG_DOMAIN_PYTHON: |
2f77fc4b DG |
2855 | case LTTNG_DOMAIN_UST: |
2856 | break; | |
2857 | default: | |
2858 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2859 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2860 | goto error; |
2861 | } | |
2862 | ||
2f77fc4b DG |
2863 | DBG("Creating UST session"); |
2864 | ||
dec56f6c | 2865 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2866 | if (lus == NULL) { |
f73fabfd | 2867 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2868 | goto error; |
2869 | } | |
2870 | ||
2f77fc4b DG |
2871 | lus->uid = session->uid; |
2872 | lus->gid = session->gid; | |
2bba9e53 | 2873 | lus->output_traces = session->output_traces; |
27babd3a | 2874 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2875 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2876 | session->ust_session = lus; |
d7ba1388 | 2877 | if (session->shm_path[0]) { |
3d071855 MD |
2878 | strncpy(lus->root_shm_path, session->shm_path, |
2879 | sizeof(lus->root_shm_path)); | |
2880 | lus->root_shm_path[sizeof(lus->root_shm_path) - 1] = '\0'; | |
d7ba1388 MD |
2881 | strncpy(lus->shm_path, session->shm_path, |
2882 | sizeof(lus->shm_path)); | |
2883 | lus->shm_path[sizeof(lus->shm_path) - 1] = '\0'; | |
2884 | strncat(lus->shm_path, "/ust", | |
2885 | sizeof(lus->shm_path) - strlen(lus->shm_path) - 1); | |
2886 | } | |
2f77fc4b DG |
2887 | /* Copy session output to the newly created UST session */ |
2888 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2889 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2890 | goto error; |
2891 | } | |
2892 | ||
f73fabfd | 2893 | return LTTNG_OK; |
00e2e675 DG |
2894 | |
2895 | error: | |
2f77fc4b DG |
2896 | free(lus); |
2897 | session->ust_session = NULL; | |
00e2e675 DG |
2898 | return ret; |
2899 | } | |
2900 | ||
2901 | /* | |
2f77fc4b | 2902 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2903 | */ |
2f77fc4b | 2904 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2905 | { |
2906 | int ret; | |
a4b92340 | 2907 | |
2f77fc4b | 2908 | DBG("Creating kernel session"); |
00e2e675 | 2909 | |
2f77fc4b DG |
2910 | ret = kernel_create_session(session, kernel_tracer_fd); |
2911 | if (ret < 0) { | |
f73fabfd | 2912 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2913 | goto error; |
2914 | } | |
2915 | ||
2f77fc4b DG |
2916 | /* Code flow safety */ |
2917 | assert(session->kernel_session); | |
2918 | ||
2919 | /* Copy session output to the newly created Kernel session */ | |
2920 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2921 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2922 | goto error; |
2923 | } | |
2924 | ||
2f77fc4b DG |
2925 | /* Create directory(ies) on local filesystem. */ |
2926 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2927 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2928 | ret = run_as_mkdir_recursive( | |
2929 | session->kernel_session->consumer->dst.trace_path, | |
2930 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2931 | if (ret < 0) { | |
df5b86c8 | 2932 | if (errno != EEXIST) { |
2f77fc4b | 2933 | ERR("Trace directory creation error"); |
00e2e675 DG |
2934 | goto error; |
2935 | } | |
00e2e675 | 2936 | } |
2f77fc4b | 2937 | } |
00e2e675 | 2938 | |
2f77fc4b DG |
2939 | session->kernel_session->uid = session->uid; |
2940 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2941 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2942 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2943 | |
f73fabfd | 2944 | return LTTNG_OK; |
00e2e675 | 2945 | |
2f77fc4b DG |
2946 | error: |
2947 | trace_kernel_destroy_session(session->kernel_session); | |
2948 | session->kernel_session = NULL; | |
2949 | return ret; | |
2950 | } | |
00e2e675 | 2951 | |
2f77fc4b DG |
2952 | /* |
2953 | * Count number of session permitted by uid/gid. | |
2954 | */ | |
2955 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2956 | { | |
2957 | unsigned int i = 0; | |
2958 | struct ltt_session *session; | |
07424f16 | 2959 | |
2f77fc4b DG |
2960 | DBG("Counting number of available session for UID %d GID %d", |
2961 | uid, gid); | |
2962 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2963 | /* |
2f77fc4b | 2964 | * Only list the sessions the user can control. |
00e2e675 | 2965 | */ |
2f77fc4b DG |
2966 | if (!session_access_ok(session, uid, gid)) { |
2967 | continue; | |
2968 | } | |
2969 | i++; | |
a4b92340 | 2970 | } |
2f77fc4b | 2971 | return i; |
00e2e675 DG |
2972 | } |
2973 | ||
54d01ffb DG |
2974 | /* |
2975 | * Process the command requested by the lttng client within the command | |
2976 | * context structure. This function make sure that the return structure (llm) | |
2977 | * is set and ready for transmission before returning. | |
2978 | * | |
2979 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2980 | * |
2981 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2982 | * |
2983 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2984 | */ |
53a80697 MD |
2985 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2986 | int *sock_error) | |
54d01ffb | 2987 | { |
f73fabfd | 2988 | int ret = LTTNG_OK; |
44d3bd01 | 2989 | int need_tracing_session = 1; |
2e09ba09 | 2990 | int need_domain; |
54d01ffb DG |
2991 | |
2992 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2993 | ||
3745d315 MD |
2994 | assert(!rcu_read_ongoing()); |
2995 | ||
53a80697 MD |
2996 | *sock_error = 0; |
2997 | ||
2e09ba09 MD |
2998 | switch (cmd_ctx->lsm->cmd_type) { |
2999 | case LTTNG_CREATE_SESSION: | |
27babd3a | 3000 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 3001 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
3002 | case LTTNG_DESTROY_SESSION: |
3003 | case LTTNG_LIST_SESSIONS: | |
3004 | case LTTNG_LIST_DOMAINS: | |
3005 | case LTTNG_START_TRACE: | |
3006 | case LTTNG_STOP_TRACE: | |
6d805429 | 3007 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
3008 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3009 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3010 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3011 | case LTTNG_SNAPSHOT_RECORD: | |
fb198a11 | 3012 | case LTTNG_SAVE_SESSION: |
d7ba1388 | 3013 | case LTTNG_SET_SESSION_SHM_PATH: |
eded6438 | 3014 | case LTTNG_REGENERATE_METADATA: |
c2561365 | 3015 | case LTTNG_REGENERATE_STATEDUMP: |
db671df9 | 3016 | case LTTNG_REGISTER_TRIGGER: |
2e09ba09 | 3017 | need_domain = 0; |
3aace903 | 3018 | break; |
2e09ba09 MD |
3019 | default: |
3020 | need_domain = 1; | |
3021 | } | |
3022 | ||
3023 | if (opt_no_kernel && need_domain | |
3024 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 3025 | if (!is_root) { |
f73fabfd | 3026 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 3027 | } else { |
f73fabfd | 3028 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 3029 | } |
4fba7219 DG |
3030 | goto error; |
3031 | } | |
3032 | ||
8d3113b2 DG |
3033 | /* Deny register consumer if we already have a spawned consumer. */ |
3034 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
3035 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
3036 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 3037 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 3038 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
3039 | goto error; |
3040 | } | |
3041 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
3042 | } | |
3043 | ||
54d01ffb DG |
3044 | /* |
3045 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 3046 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
3047 | * command. |
3048 | */ | |
3049 | switch(cmd_ctx->lsm->cmd_type) { | |
3050 | case LTTNG_LIST_SESSIONS: | |
3051 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 3052 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
3053 | case LTTNG_LIST_DOMAINS: |
3054 | case LTTNG_LIST_CHANNELS: | |
3055 | case LTTNG_LIST_EVENTS: | |
834978fd | 3056 | case LTTNG_LIST_SYSCALLS: |
a5dfbb9d | 3057 | case LTTNG_LIST_TRACKER_PIDS: |
5cd0780d | 3058 | case LTTNG_DATA_PENDING: |
54d01ffb DG |
3059 | break; |
3060 | default: | |
3061 | /* Setup lttng message with no payload */ | |
6e10c9b9 | 3062 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0); |
54d01ffb DG |
3063 | if (ret < 0) { |
3064 | /* This label does not try to unlock the session */ | |
3065 | goto init_setup_error; | |
3066 | } | |
3067 | } | |
3068 | ||
3069 | /* Commands that DO NOT need a session. */ | |
3070 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 3071 | case LTTNG_CREATE_SESSION: |
27babd3a | 3072 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 3073 | case LTTNG_CREATE_SESSION_LIVE: |
54d01ffb DG |
3074 | case LTTNG_LIST_SESSIONS: |
3075 | case LTTNG_LIST_TRACEPOINTS: | |
834978fd | 3076 | case LTTNG_LIST_SYSCALLS: |
f37d259d | 3077 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
fb198a11 | 3078 | case LTTNG_SAVE_SESSION: |
db671df9 | 3079 | case LTTNG_REGISTER_TRIGGER: |
44d3bd01 | 3080 | need_tracing_session = 0; |
54d01ffb DG |
3081 | break; |
3082 | default: | |
3083 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
3084 | /* |
3085 | * We keep the session list lock across _all_ commands | |
3086 | * for now, because the per-session lock does not | |
3087 | * handle teardown properly. | |
3088 | */ | |
74babd95 | 3089 | session_lock_list(); |
54d01ffb DG |
3090 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
3091 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 3092 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
3093 | goto error; |
3094 | } else { | |
3095 | /* Acquire lock for the session */ | |
3096 | session_lock(cmd_ctx->session); | |
3097 | } | |
3098 | break; | |
3099 | } | |
b389abbe | 3100 | |
5f3ecf22 DG |
3101 | /* |
3102 | * Commands that need a valid session but should NOT create one if none | |
3103 | * exists. Instead of creating one and destroying it when the command is | |
3104 | * handled, process that right before so we save some round trip in useless | |
3105 | * code path. | |
3106 | */ | |
3107 | switch (cmd_ctx->lsm->cmd_type) { | |
3108 | case LTTNG_DISABLE_CHANNEL: | |
3109 | case LTTNG_DISABLE_EVENT: | |
5f3ecf22 DG |
3110 | switch (cmd_ctx->lsm->domain.type) { |
3111 | case LTTNG_DOMAIN_KERNEL: | |
3112 | if (!cmd_ctx->session->kernel_session) { | |
3113 | ret = LTTNG_ERR_NO_CHANNEL; | |
3114 | goto error; | |
3115 | } | |
3116 | break; | |
3117 | case LTTNG_DOMAIN_JUL: | |
5cdb6027 | 3118 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3119 | case LTTNG_DOMAIN_PYTHON: |
5f3ecf22 DG |
3120 | case LTTNG_DOMAIN_UST: |
3121 | if (!cmd_ctx->session->ust_session) { | |
3122 | ret = LTTNG_ERR_NO_CHANNEL; | |
3123 | goto error; | |
3124 | } | |
3125 | break; | |
3126 | default: | |
3127 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3128 | goto error; | |
3129 | } | |
3130 | default: | |
3131 | break; | |
3132 | } | |
3133 | ||
2e09ba09 MD |
3134 | if (!need_domain) { |
3135 | goto skip_domain; | |
3136 | } | |
a4b92340 | 3137 | |
54d01ffb DG |
3138 | /* |
3139 | * Check domain type for specific "pre-action". | |
3140 | */ | |
3141 | switch (cmd_ctx->lsm->domain.type) { | |
3142 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 3143 | if (!is_root) { |
f73fabfd | 3144 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
3145 | goto error; |
3146 | } | |
3147 | ||
54d01ffb | 3148 | /* Kernel tracer check */ |
a4b35e07 | 3149 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3150 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3151 | ret = init_kernel_tracer(); |
3152 | if (ret != 0) { | |
54d01ffb DG |
3153 | goto error; |
3154 | } | |
3155 | } | |
5eb91c98 | 3156 | |
5c827ce0 DG |
3157 | /* Consumer is in an ERROR state. Report back to client */ |
3158 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3159 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3160 | goto error; |
3161 | } | |
3162 | ||
54d01ffb | 3163 | /* Need a session for kernel command */ |
44d3bd01 | 3164 | if (need_tracing_session) { |
54d01ffb | 3165 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3166 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3167 | if (ret < 0) { |
f73fabfd | 3168 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
3169 | goto error; |
3170 | } | |
b389abbe | 3171 | } |
7d29a247 | 3172 | |
54d01ffb | 3173 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3174 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3175 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 3176 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3177 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3178 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3179 | if (ret < 0) { |
f73fabfd | 3180 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 3181 | goto error; |
950131af | 3182 | } |
5c827ce0 | 3183 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
3184 | } else { |
3185 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3186 | } |
173af62f | 3187 | |
a4b92340 DG |
3188 | /* |
3189 | * The consumer was just spawned so we need to add the socket to | |
3190 | * the consumer output of the session if exist. | |
3191 | */ | |
3192 | ret = consumer_create_socket(&kconsumer_data, | |
3193 | cmd_ctx->session->kernel_session->consumer); | |
3194 | if (ret < 0) { | |
3195 | goto error; | |
173af62f | 3196 | } |
0d0c377a | 3197 | } |
5c827ce0 | 3198 | |
54d01ffb | 3199 | break; |
b9dfb167 | 3200 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3201 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3202 | case LTTNG_DOMAIN_PYTHON: |
2bdd86d4 | 3203 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3204 | { |
b51ec5b4 MD |
3205 | if (!ust_app_supported()) { |
3206 | ret = LTTNG_ERR_NO_UST; | |
3207 | goto error; | |
3208 | } | |
5c827ce0 DG |
3209 | /* Consumer is in an ERROR state. Report back to client */ |
3210 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3211 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3212 | goto error; |
3213 | } | |
3214 | ||
44d3bd01 | 3215 | if (need_tracing_session) { |
a4b92340 | 3216 | /* Create UST session if none exist. */ |
f6a9efaa | 3217 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3218 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3219 | &cmd_ctx->lsm->domain); |
f73fabfd | 3220 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
3221 | goto error; |
3222 | } | |
3223 | } | |
00e2e675 | 3224 | |
7753dea8 MD |
3225 | /* Start the UST consumer daemons */ |
3226 | /* 64-bit */ | |
3227 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 3228 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 3229 | ustconsumer64_data.pid == 0 && |
785d2d0d | 3230 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3231 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3232 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3233 | if (ret < 0) { |
f73fabfd | 3234 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 3235 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
3236 | goto error; |
3237 | } | |
48842b30 | 3238 | |
173af62f | 3239 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 3240 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3241 | } else { |
7753dea8 MD |
3242 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3243 | } | |
173af62f DG |
3244 | |
3245 | /* | |
3246 | * Setup socket for consumer 64 bit. No need for atomic access | |
3247 | * since it was set above and can ONLY be set in this thread. | |
3248 | */ | |
a4b92340 DG |
3249 | ret = consumer_create_socket(&ustconsumer64_data, |
3250 | cmd_ctx->session->ust_session->consumer); | |
3251 | if (ret < 0) { | |
3252 | goto error; | |
173af62f DG |
3253 | } |
3254 | ||
7753dea8 | 3255 | /* 32-bit */ |
385b881b | 3256 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); |
fc7a59ce | 3257 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 3258 | ustconsumer32_data.pid == 0 && |
785d2d0d | 3259 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3260 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
3261 | ret = start_consumerd(&ustconsumer32_data); | |
3262 | if (ret < 0) { | |
f73fabfd | 3263 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 3264 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
3265 | goto error; |
3266 | } | |
5c827ce0 | 3267 | |
173af62f | 3268 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 3269 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3270 | } else { |
3271 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3272 | } |
173af62f DG |
3273 | |
3274 | /* | |
3275 | * Setup socket for consumer 64 bit. No need for atomic access | |
3276 | * since it was set above and can ONLY be set in this thread. | |
3277 | */ | |
a4b92340 DG |
3278 | ret = consumer_create_socket(&ustconsumer32_data, |
3279 | cmd_ctx->session->ust_session->consumer); | |
3280 | if (ret < 0) { | |
3281 | goto error; | |
173af62f | 3282 | } |
44d3bd01 DG |
3283 | } |
3284 | break; | |
48842b30 | 3285 | } |
54d01ffb | 3286 | default: |
54d01ffb DG |
3287 | break; |
3288 | } | |
2e09ba09 | 3289 | skip_domain: |
33a2b854 | 3290 | |
5c827ce0 DG |
3291 | /* Validate consumer daemon state when start/stop trace command */ |
3292 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3293 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3294 | switch (cmd_ctx->lsm->domain.type) { | |
e7619875 JG |
3295 | case LTTNG_DOMAIN_NONE: |
3296 | break; | |
b9dfb167 | 3297 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3298 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3299 | case LTTNG_DOMAIN_PYTHON: |
5c827ce0 DG |
3300 | case LTTNG_DOMAIN_UST: |
3301 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3302 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3303 | goto error; |
3304 | } | |
3305 | break; | |
3306 | case LTTNG_DOMAIN_KERNEL: | |
3307 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3308 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3309 | goto error; |
3310 | } | |
3311 | break; | |
825535cc JG |
3312 | default: |
3313 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3314 | goto error; | |
5c827ce0 DG |
3315 | } |
3316 | } | |
3317 | ||
8e0af1b4 MD |
3318 | /* |
3319 | * Check that the UID or GID match that of the tracing session. | |
3320 | * The root user can interact with all sessions. | |
3321 | */ | |
3322 | if (need_tracing_session) { | |
3323 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3324 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3325 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 3326 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
3327 | goto error; |
3328 | } | |
3329 | } | |
3330 | ||
ffe60014 DG |
3331 | /* |
3332 | * Send relayd information to consumer as soon as we have a domain and a | |
3333 | * session defined. | |
3334 | */ | |
3335 | if (cmd_ctx->session && need_domain) { | |
3336 | /* | |
3337 | * Setup relayd if not done yet. If the relayd information was already | |
3338 | * sent to the consumer, this call will gracefully return. | |
3339 | */ | |
3340 | ret = cmd_setup_relayd(cmd_ctx->session); | |
3341 | if (ret != LTTNG_OK) { | |
3342 | goto error; | |
3343 | } | |
3344 | } | |
3345 | ||
54d01ffb DG |
3346 | /* Process by command type */ |
3347 | switch (cmd_ctx->lsm->cmd_type) { | |
3348 | case LTTNG_ADD_CONTEXT: | |
3349 | { | |
2001793c JG |
3350 | /* |
3351 | * An LTTNG_ADD_CONTEXT command might have a supplementary | |
3352 | * payload if the context being added is an application context. | |
3353 | */ | |
3354 | if (cmd_ctx->lsm->u.context.ctx.ctx == | |
3355 | LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
3356 | char *provider_name = NULL, *context_name = NULL; | |
3357 | size_t provider_name_len = | |
3358 | cmd_ctx->lsm->u.context.provider_name_len; | |
3359 | size_t context_name_len = | |
3360 | cmd_ctx->lsm->u.context.context_name_len; | |
3361 | ||
3362 | if (provider_name_len == 0 || context_name_len == 0) { | |
3363 | /* | |
3364 | * Application provider and context names MUST | |
3365 | * be provided. | |
3366 | */ | |
3367 | ret = -LTTNG_ERR_INVALID; | |
3368 | goto error; | |
3369 | } | |
3370 | ||
3371 | provider_name = zmalloc(provider_name_len + 1); | |
3372 | if (!provider_name) { | |
3373 | ret = -LTTNG_ERR_NOMEM; | |
3374 | goto error; | |
3375 | } | |
e0f4d107 JG |
3376 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = |
3377 | provider_name; | |
2001793c JG |
3378 | |
3379 | context_name = zmalloc(context_name_len + 1); | |
3380 | if (!context_name) { | |
3381 | ret = -LTTNG_ERR_NOMEM; | |
3382 | goto error_add_context; | |
3383 | } | |
e0f4d107 JG |
3384 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = |
3385 | context_name; | |
2001793c JG |
3386 | |
3387 | ret = lttcomm_recv_unix_sock(sock, provider_name, | |
3388 | provider_name_len); | |
3389 | if (ret < 0) { | |
3390 | goto error_add_context; | |
3391 | } | |
3392 | ||
3393 | ret = lttcomm_recv_unix_sock(sock, context_name, | |
3394 | context_name_len); | |
3395 | if (ret < 0) { | |
3396 | goto error_add_context; | |
3397 | } | |
2001793c JG |
3398 | } |
3399 | ||
3400 | /* | |
3401 | * cmd_add_context assumes ownership of the provider and context | |
3402 | * names. | |
3403 | */ | |
3404 | ret = cmd_add_context(cmd_ctx->session, | |
3405 | cmd_ctx->lsm->domain.type, | |
54d01ffb | 3406 | cmd_ctx->lsm->u.context.channel_name, |
2001793c JG |
3407 | &cmd_ctx->lsm->u.context.ctx, |
3408 | kernel_poll_pipe[1]); | |
3409 | ||
3410 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = NULL; | |
3411 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = NULL; | |
3412 | error_add_context: | |
3413 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name); | |
3414 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name); | |
3415 | if (ret < 0) { | |
3416 | goto error; | |
3417 | } | |
54d01ffb DG |
3418 | break; |
3419 | } | |
3420 | case LTTNG_DISABLE_CHANNEL: | |
3421 | { | |
3422 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3423 | cmd_ctx->lsm->u.disable.channel_name); | |
3424 | break; | |
3425 | } | |
3426 | case LTTNG_DISABLE_EVENT: | |
3427 | { | |
47b7e2f9 JG |
3428 | |
3429 | /* | |
3430 | * FIXME: handle filter; for now we just receive the filter's | |
3431 | * bytecode along with the filter expression which are sent by | |
3432 | * liblttng-ctl and discard them. | |
3433 | * | |
3434 | * This fixes an issue where the client may block while sending | |
3435 | * the filter payload and encounter an error because the session | |
3436 | * daemon closes the socket without ever handling this data. | |
3437 | */ | |
3438 | size_t count = cmd_ctx->lsm->u.disable.expression_len + | |
3439 | cmd_ctx->lsm->u.disable.bytecode_len; | |
3440 | ||
3441 | if (count) { | |
3442 | char data[LTTNG_FILTER_MAX_LEN]; | |
3443 | ||
3444 | DBG("Discarding disable event command payload of size %zu", count); | |
3445 | while (count) { | |
3446 | ret = lttcomm_recv_unix_sock(sock, data, | |
3447 | count > sizeof(data) ? sizeof(data) : count); | |
3448 | if (ret < 0) { | |
3449 | goto error; | |
3450 | } | |
3451 | ||
3452 | count -= (size_t) ret; | |
3453 | } | |
3454 | } | |
6e911cad | 3455 | /* FIXME: passing packed structure to non-packed pointer */ |
54d01ffb DG |
3456 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3457 | cmd_ctx->lsm->u.disable.channel_name, | |
6e911cad | 3458 | &cmd_ctx->lsm->u.disable.event); |
33a2b854 DG |
3459 | break; |
3460 | } | |
54d01ffb DG |
3461 | case LTTNG_ENABLE_CHANNEL: |
3462 | { | |
7972aab2 | 3463 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 3464 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
3465 | break; |
3466 | } | |
ccf10263 MD |
3467 | case LTTNG_TRACK_PID: |
3468 | { | |
3469 | ret = cmd_track_pid(cmd_ctx->session, | |
3470 | cmd_ctx->lsm->domain.type, | |
3471 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3472 | break; | |
3473 | } | |
3474 | case LTTNG_UNTRACK_PID: | |
3475 | { | |
3476 | ret = cmd_untrack_pid(cmd_ctx->session, | |
3477 | cmd_ctx->lsm->domain.type, | |
3478 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3479 | break; | |
3480 | } | |
54d01ffb DG |
3481 | case LTTNG_ENABLE_EVENT: |
3482 | { | |
882ef835 JI |
3483 | struct lttng_event_exclusion *exclusion = NULL; |
3484 | struct lttng_filter_bytecode *bytecode = NULL; | |
6b453b5e | 3485 | char *filter_expression = NULL; |
882ef835 | 3486 | |
67676bd8 DG |
3487 | /* Handle exclusion events and receive it from the client. */ |
3488 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3489 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3490 | ||
3491 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3492 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3493 | if (!exclusion) { | |
3494 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3495 | goto error; | |
882ef835 | 3496 | } |
882ef835 | 3497 | |
67676bd8 DG |
3498 | DBG("Receiving var len exclusion event list from client ..."); |
3499 | exclusion->count = count; | |
3500 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3501 | count * LTTNG_SYMBOL_NAME_LEN); | |
3502 | if (ret <= 0) { | |
3503 | DBG("Nothing recv() from client var len data... continuing"); | |
3504 | *sock_error = 1; | |
3505 | free(exclusion); | |
3506 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3507 | goto error; | |
3508 | } | |
3509 | } | |
3510 | ||
6b453b5e JG |
3511 | /* Get filter expression from client. */ |
3512 | if (cmd_ctx->lsm->u.enable.expression_len > 0) { | |
3513 | size_t expression_len = | |
3514 | cmd_ctx->lsm->u.enable.expression_len; | |
3515 | ||
3516 | if (expression_len > LTTNG_FILTER_MAX_LEN) { | |
3517 | ret = LTTNG_ERR_FILTER_INVAL; | |
3518 | free(exclusion); | |
3519 | goto error; | |
3520 | } | |
3521 | ||
3522 | filter_expression = zmalloc(expression_len); | |
3523 | if (!filter_expression) { | |
3524 | free(exclusion); | |
3525 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3526 | goto error; | |
3527 | } | |
3528 | ||
3529 | /* Receive var. len. data */ | |
3530 | DBG("Receiving var len filter's expression from client ..."); | |
3531 | ret = lttcomm_recv_unix_sock(sock, filter_expression, | |
3532 | expression_len); | |
3533 | if (ret <= 0) { | |
3534 | DBG("Nothing recv() from client car len data... continuing"); | |
3535 | *sock_error = 1; | |
3536 | free(filter_expression); | |
3537 | free(exclusion); | |
3538 | ret = LTTNG_ERR_FILTER_INVAL; | |
3539 | goto error; | |
3540 | } | |
3541 | } | |
3542 | ||
67676bd8 DG |
3543 | /* Handle filter and get bytecode from client. */ |
3544 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3545 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3546 | ||
3547 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3548 | ret = LTTNG_ERR_FILTER_INVAL; | |
49d21f93 | 3549 | free(filter_expression); |
67676bd8 DG |
3550 | free(exclusion); |
3551 | goto error; | |
3552 | } | |
3553 | ||
3554 | bytecode = zmalloc(bytecode_len); | |
3555 | if (!bytecode) { | |
49d21f93 | 3556 | free(filter_expression); |
67676bd8 DG |
3557 | free(exclusion); |
3558 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3559 | goto error; | |
882ef835 JI |
3560 | } |
3561 | ||
67676bd8 DG |
3562 | /* Receive var. len. data */ |
3563 | DBG("Receiving var len filter's bytecode from client ..."); | |
3564 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3565 | if (ret <= 0) { | |
3566 | DBG("Nothing recv() from client car len data... continuing"); | |
3567 | *sock_error = 1; | |
49d21f93 | 3568 | free(filter_expression); |
67676bd8 DG |
3569 | free(bytecode); |
3570 | free(exclusion); | |
3571 | ret = LTTNG_ERR_FILTER_INVAL; | |
3572 | goto error; | |
3573 | } | |
3574 | ||
3575 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
49d21f93 | 3576 | free(filter_expression); |
67676bd8 DG |
3577 | free(bytecode); |
3578 | free(exclusion); | |
3579 | ret = LTTNG_ERR_FILTER_INVAL; | |
3580 | goto error; | |
3581 | } | |
882ef835 | 3582 | } |
67676bd8 DG |
3583 | |
3584 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3585 | cmd_ctx->lsm->u.enable.channel_name, | |
6b453b5e JG |
3586 | &cmd_ctx->lsm->u.enable.event, |
3587 | filter_expression, bytecode, exclusion, | |
67676bd8 | 3588 | kernel_poll_pipe[1]); |
54d01ffb DG |
3589 | break; |
3590 | } | |
052da939 | 3591 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3592 | { |
9f19cc17 | 3593 | struct lttng_event *events; |
54d01ffb | 3594 | ssize_t nb_events; |
052da939 | 3595 | |
0845bbfa | 3596 | session_lock_list(); |
54d01ffb | 3597 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
0845bbfa | 3598 | session_unlock_list(); |
54d01ffb | 3599 | if (nb_events < 0) { |
f73fabfd | 3600 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3601 | ret = -nb_events; |
3602 | goto error; | |
2ef84c95 DG |
3603 | } |
3604 | ||
3605 | /* | |
3606 | * Setup lttng message with payload size set to the event list size in | |
3607 | * bytes and then copy list into the llm payload. | |
3608 | */ | |
6e10c9b9 PP |
3609 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3610 | sizeof(struct lttng_event) * nb_events); | |
3611 | free(events); | |
3612 | ||
2ef84c95 DG |
3613 | if (ret < 0) { |
3614 | goto setup_error; | |
3615 | } | |
3616 | ||
f73fabfd | 3617 | ret = LTTNG_OK; |
2ef84c95 DG |
3618 | break; |
3619 | } | |
f37d259d MD |
3620 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3621 | { | |
3622 | struct lttng_event_field *fields; | |
3623 | ssize_t nb_fields; | |
3624 | ||
0845bbfa | 3625 | session_lock_list(); |
a4b92340 DG |
3626 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3627 | &fields); | |
0845bbfa | 3628 | session_unlock_list(); |
f37d259d | 3629 | if (nb_fields < 0) { |
f73fabfd | 3630 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3631 | ret = -nb_fields; |
3632 | goto error; | |
3633 | } | |
3634 | ||
3635 | /* | |
3636 | * Setup lttng message with payload size set to the event list size in | |
3637 | * bytes and then copy list into the llm payload. | |
3638 | */ | |
6e10c9b9 | 3639 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, fields, |
a4b92340 | 3640 | sizeof(struct lttng_event_field) * nb_fields); |
6e10c9b9 PP |
3641 | free(fields); |
3642 | ||
f37d259d | 3643 | if (ret < 0) { |
f37d259d MD |
3644 | goto setup_error; |
3645 | } | |
3646 | ||
f73fabfd | 3647 | ret = LTTNG_OK; |
f37d259d MD |
3648 | break; |
3649 | } | |
834978fd DG |
3650 | case LTTNG_LIST_SYSCALLS: |
3651 | { | |
3652 | struct lttng_event *events; | |
3653 | ssize_t nb_events; | |
3654 | ||
3655 | nb_events = cmd_list_syscalls(&events); | |
3656 | if (nb_events < 0) { | |
3657 | /* Return value is a negative lttng_error_code. */ | |
3658 | ret = -nb_events; | |
3659 | goto error; | |
3660 | } | |
3661 | ||
3662 | /* | |
3663 | * Setup lttng message with payload size set to the event list size in | |
3664 | * bytes and then copy list into the llm payload. | |
3665 | */ | |
6e10c9b9 PP |
3666 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3667 | sizeof(struct lttng_event) * nb_events); | |
3668 | free(events); | |
3669 | ||
834978fd | 3670 | if (ret < 0) { |
834978fd DG |
3671 | goto setup_error; |
3672 | } | |
3673 | ||
834978fd DG |
3674 | ret = LTTNG_OK; |
3675 | break; | |
3676 | } | |
a5dfbb9d MD |
3677 | case LTTNG_LIST_TRACKER_PIDS: |
3678 | { | |
3679 | int32_t *pids = NULL; | |
3680 | ssize_t nr_pids; | |
3681 | ||
3682 | nr_pids = cmd_list_tracker_pids(cmd_ctx->session, | |
3683 | cmd_ctx->lsm->domain.type, &pids); | |
3684 | if (nr_pids < 0) { | |
3685 | /* Return value is a negative lttng_error_code. */ | |
3686 | ret = -nr_pids; | |
3687 | goto error; | |
3688 | } | |
3689 | ||
3690 | /* | |
3691 | * Setup lttng message with payload size set to the event list size in | |
3692 | * bytes and then copy list into the llm payload. | |
3693 | */ | |
6e10c9b9 PP |
3694 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, pids, |
3695 | sizeof(int32_t) * nr_pids); | |
3696 | free(pids); | |
3697 | ||
a5dfbb9d | 3698 | if (ret < 0) { |
a5dfbb9d MD |
3699 | goto setup_error; |
3700 | } | |
3701 | ||
a5dfbb9d MD |
3702 | ret = LTTNG_OK; |
3703 | break; | |
3704 | } | |
00e2e675 DG |
3705 | case LTTNG_SET_CONSUMER_URI: |
3706 | { | |
a4b92340 DG |
3707 | size_t nb_uri, len; |
3708 | struct lttng_uri *uris; | |
3709 | ||
3710 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3711 | len = nb_uri * sizeof(struct lttng_uri); | |
3712 | ||
3713 | if (nb_uri == 0) { | |
f73fabfd | 3714 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3715 | goto error; |
3716 | } | |
3717 | ||
3718 | uris = zmalloc(len); | |
3719 | if (uris == NULL) { | |
f73fabfd | 3720 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3721 | goto error; |
3722 | } | |
3723 | ||
3724 | /* Receive variable len data */ | |
77c7c900 | 3725 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3726 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3727 | if (ret <= 0) { | |
3728 | DBG("No URIs received from client... continuing"); | |
3729 | *sock_error = 1; | |
f73fabfd | 3730 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3731 | free(uris); |
a4b92340 DG |
3732 | goto error; |
3733 | } | |
3734 | ||
bda32d56 JG |
3735 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); |
3736 | free(uris); | |
f73fabfd | 3737 | if (ret != LTTNG_OK) { |
a4b92340 DG |
3738 | goto error; |
3739 | } | |
3740 | ||
b1d41407 | 3741 | |
00e2e675 DG |
3742 | break; |
3743 | } | |
f3ed775e | 3744 | case LTTNG_START_TRACE: |
8c0faa1d | 3745 | { |
54d01ffb | 3746 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3747 | break; |
3748 | } | |
f3ed775e | 3749 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3750 | { |
54d01ffb | 3751 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3752 | break; |
3753 | } | |
5e16da05 MD |
3754 | case LTTNG_CREATE_SESSION: |
3755 | { | |
a4b92340 DG |
3756 | size_t nb_uri, len; |
3757 | struct lttng_uri *uris = NULL; | |
3758 | ||
3759 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3760 | len = nb_uri * sizeof(struct lttng_uri); | |
3761 | ||
3762 | if (nb_uri > 0) { | |
3763 | uris = zmalloc(len); | |
3764 | if (uris == NULL) { | |
f73fabfd | 3765 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3766 | goto error; |
3767 | } | |
3768 | ||
3769 | /* Receive variable len data */ | |
77c7c900 | 3770 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3771 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3772 | if (ret <= 0) { | |
3773 | DBG("No URIs received from client... continuing"); | |
3774 | *sock_error = 1; | |
f73fabfd | 3775 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3776 | free(uris); |
a4b92340 DG |
3777 | goto error; |
3778 | } | |
3779 | ||
3780 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3781 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3782 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3783 | free(uris); |
a4b92340 DG |
3784 | goto error; |
3785 | } | |
3786 | } | |
3787 | ||
3788 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3789 | &cmd_ctx->creds, 0); |
a4b92340 | 3790 | |
b1d41407 DG |
3791 | free(uris); |
3792 | ||
00e2e675 DG |
3793 | break; |
3794 | } | |
5e16da05 MD |
3795 | case LTTNG_DESTROY_SESSION: |
3796 | { | |
2f77fc4b | 3797 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3798 | |
3799 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3800 | cmd_ctx->session = NULL; |
5461b305 | 3801 | break; |
5e16da05 | 3802 | } |
9f19cc17 | 3803 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3804 | { |
54d01ffb | 3805 | ssize_t nb_dom; |
fa64dfb4 | 3806 | struct lttng_domain *domains = NULL; |
5461b305 | 3807 | |
54d01ffb DG |
3808 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3809 | if (nb_dom < 0) { | |
f73fabfd | 3810 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3811 | ret = -nb_dom; |
3812 | goto error; | |
ce3d728c | 3813 | } |
520ff687 | 3814 | |
6e10c9b9 PP |
3815 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, domains, |
3816 | nb_dom * sizeof(struct lttng_domain)); | |
3817 | free(domains); | |
3818 | ||
5461b305 DG |
3819 | if (ret < 0) { |
3820 | goto setup_error; | |
520ff687 | 3821 | } |
57167058 | 3822 | |
f73fabfd | 3823 | ret = LTTNG_OK; |
5e16da05 MD |
3824 | break; |
3825 | } | |
9f19cc17 | 3826 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3827 | { |
53e367f9 | 3828 | ssize_t payload_size; |
ade7ce52 | 3829 | struct lttng_channel *channels = NULL; |
54d01ffb | 3830 | |
53e367f9 | 3831 | payload_size = cmd_list_channels(cmd_ctx->lsm->domain.type, |
b551a063 | 3832 | cmd_ctx->session, &channels); |
53e367f9 | 3833 | if (payload_size < 0) { |
f73fabfd | 3834 | /* Return value is a negative lttng_error_code. */ |
53e367f9 | 3835 | ret = -payload_size; |
54d01ffb | 3836 | goto error; |
5461b305 | 3837 | } |
ca95a216 | 3838 | |
6e10c9b9 | 3839 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, channels, |
53e367f9 | 3840 | payload_size); |
6e10c9b9 PP |
3841 | free(channels); |
3842 | ||
5461b305 DG |
3843 | if (ret < 0) { |
3844 | goto setup_error; | |
3845 | } | |
9f19cc17 | 3846 | |
f73fabfd | 3847 | ret = LTTNG_OK; |
5461b305 | 3848 | break; |
5e16da05 | 3849 | } |
9f19cc17 | 3850 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3851 | { |
b551a063 | 3852 | ssize_t nb_event; |
684d34d2 | 3853 | struct lttng_event *events = NULL; |
b4e3ceb9 PP |
3854 | struct lttcomm_event_command_header cmd_header; |
3855 | size_t total_size; | |
3856 | ||
b2d66287 | 3857 | memset(&cmd_header, 0, sizeof(cmd_header)); |
b4e3ceb9 PP |
3858 | /* Extended infos are included at the end of events */ |
3859 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, | |
3860 | cmd_ctx->session, cmd_ctx->lsm->u.list.channel_name, | |
3861 | &events, &total_size); | |
9f19cc17 | 3862 | |
54d01ffb | 3863 | if (nb_event < 0) { |
f73fabfd | 3864 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3865 | ret = -nb_event; |
3866 | goto error; | |
5461b305 | 3867 | } |
ca95a216 | 3868 | |
b4e3ceb9 PP |
3869 | cmd_header.nb_events = nb_event; |
3870 | ret = setup_lttng_msg(cmd_ctx, events, total_size, | |
3871 | &cmd_header, sizeof(cmd_header)); | |
6e10c9b9 PP |
3872 | free(events); |
3873 | ||
5461b305 DG |
3874 | if (ret < 0) { |
3875 | goto setup_error; | |
3876 | } | |
9f19cc17 | 3877 | |
f73fabfd | 3878 | ret = LTTNG_OK; |
5461b305 | 3879 | break; |
5e16da05 MD |
3880 | } |
3881 | case LTTNG_LIST_SESSIONS: | |
3882 | { | |
8e0af1b4 | 3883 | unsigned int nr_sessions; |
6e10c9b9 PP |
3884 | void *sessions_payload; |
3885 | size_t payload_len; | |
5461b305 | 3886 | |
8e0af1b4 | 3887 | session_lock_list(); |
730389d9 DG |
3888 | nr_sessions = lttng_sessions_count( |
3889 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3890 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6e10c9b9 PP |
3891 | payload_len = sizeof(struct lttng_session) * nr_sessions; |
3892 | sessions_payload = zmalloc(payload_len); | |
d32fb093 | 3893 | |
6e10c9b9 | 3894 | if (!sessions_payload) { |
54d01ffb | 3895 | session_unlock_list(); |
6e10c9b9 | 3896 | ret = -ENOMEM; |
5461b305 | 3897 | goto setup_error; |
e065084a | 3898 | } |
5e16da05 | 3899 | |
6e10c9b9 | 3900 | cmd_list_lttng_sessions(sessions_payload, |
730389d9 DG |
3901 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3902 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
54d01ffb | 3903 | session_unlock_list(); |
5e16da05 | 3904 | |
6e10c9b9 PP |
3905 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, sessions_payload, |
3906 | payload_len); | |
3907 | free(sessions_payload); | |
3908 | ||
3909 | if (ret < 0) { | |
3910 | goto setup_error; | |
3911 | } | |
3912 | ||
f73fabfd | 3913 | ret = LTTNG_OK; |
5e16da05 MD |
3914 | break; |
3915 | } | |
d9800920 DG |
3916 | case LTTNG_REGISTER_CONSUMER: |
3917 | { | |
2f77fc4b DG |
3918 | struct consumer_data *cdata; |
3919 | ||
3920 | switch (cmd_ctx->lsm->domain.type) { | |
3921 | case LTTNG_DOMAIN_KERNEL: | |
3922 | cdata = &kconsumer_data; | |
3923 | break; | |
3924 | default: | |
f73fabfd | 3925 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3926 | goto error; |
3927 | } | |
3928 | ||
54d01ffb | 3929 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3930 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3931 | break; |
3932 | } | |
6d805429 | 3933 | case LTTNG_DATA_PENDING: |
806e2684 | 3934 | { |
f6151c55 | 3935 | int pending_ret; |
6e10c9b9 | 3936 | uint8_t pending_ret_byte; |
f6151c55 JG |
3937 | |
3938 | pending_ret = cmd_data_pending(cmd_ctx->session); | |
6e10c9b9 | 3939 | |
f6151c55 JG |
3940 | /* |
3941 | * FIXME | |
3942 | * | |
3943 | * This function may returns 0 or 1 to indicate whether or not | |
3944 | * there is data pending. In case of error, it should return an | |
3945 | * LTTNG_ERR code. However, some code paths may still return | |
3946 | * a nondescript error code, which we handle by returning an | |
3947 | * "unknown" error. | |
3948 | */ | |
3949 | if (pending_ret == 0 || pending_ret == 1) { | |
6e10c9b9 PP |
3950 | /* |
3951 | * ret will be set to LTTNG_OK at the end of | |
3952 | * this function. | |
3953 | */ | |
f6151c55 JG |
3954 | } else if (pending_ret < 0) { |
3955 | ret = LTTNG_ERR_UNK; | |
3956 | goto setup_error; | |
3957 | } else { | |
3958 | ret = pending_ret; | |
3959 | goto setup_error; | |
3960 | } | |
3961 | ||
6e10c9b9 PP |
3962 | pending_ret_byte = (uint8_t) pending_ret; |
3963 | ||
3964 | /* 1 byte to return whether or not data is pending */ | |
3965 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, | |
3966 | &pending_ret_byte, 1); | |
3967 | ||
3968 | if (ret < 0) { | |
3969 | goto setup_error; | |
3970 | } | |
3971 | ||
3972 | ret = LTTNG_OK; | |
806e2684 DG |
3973 | break; |
3974 | } | |
da3c9ec1 DG |
3975 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3976 | { | |
6dc3064a DG |
3977 | struct lttcomm_lttng_output_id reply; |
3978 | ||
3979 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3980 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3981 | if (ret != LTTNG_OK) { | |
3982 | goto error; | |
3983 | } | |
3984 | ||
6e10c9b9 PP |
3985 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &reply, |
3986 | sizeof(reply)); | |
6dc3064a DG |
3987 | if (ret < 0) { |
3988 | goto setup_error; | |
3989 | } | |
3990 | ||
3991 | /* Copy output list into message payload */ | |
6dc3064a | 3992 | ret = LTTNG_OK; |
da3c9ec1 DG |
3993 | break; |
3994 | } | |
3995 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3996 | { | |
6dc3064a DG |
3997 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3998 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3999 | break; |
4000 | } | |
4001 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
4002 | { | |
6dc3064a DG |
4003 | ssize_t nb_output; |
4004 | struct lttng_snapshot_output *outputs = NULL; | |
4005 | ||
4006 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
4007 | if (nb_output < 0) { | |
4008 | ret = -nb_output; | |
4009 | goto error; | |
4010 | } | |
4011 | ||
6e10c9b9 PP |
4012 | assert((nb_output > 0 && outputs) || nb_output == 0); |
4013 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, outputs, | |
6dc3064a | 4014 | nb_output * sizeof(struct lttng_snapshot_output)); |
6e10c9b9 PP |
4015 | free(outputs); |
4016 | ||
6dc3064a | 4017 | if (ret < 0) { |
6dc3064a DG |
4018 | goto setup_error; |
4019 | } | |
4020 | ||
6dc3064a | 4021 | ret = LTTNG_OK; |
da3c9ec1 DG |
4022 | break; |
4023 | } | |
4024 | case LTTNG_SNAPSHOT_RECORD: | |
4025 | { | |
6dc3064a DG |
4026 | ret = cmd_snapshot_record(cmd_ctx->session, |
4027 | &cmd_ctx->lsm->u.snapshot_record.output, | |
4028 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
4029 | break; |
4030 | } | |
27babd3a DG |
4031 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
4032 | { | |
4033 | size_t nb_uri, len; | |
4034 | struct lttng_uri *uris = NULL; | |
4035 | ||
4036 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4037 | len = nb_uri * sizeof(struct lttng_uri); | |
4038 | ||
4039 | if (nb_uri > 0) { | |
4040 | uris = zmalloc(len); | |
4041 | if (uris == NULL) { | |
4042 | ret = LTTNG_ERR_FATAL; | |
4043 | goto error; | |
4044 | } | |
4045 | ||
4046 | /* Receive variable len data */ | |
4047 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
4048 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
4049 | if (ret <= 0) { | |
4050 | DBG("No URIs received from client... continuing"); | |
4051 | *sock_error = 1; | |
4052 | ret = LTTNG_ERR_SESSION_FAIL; | |
4053 | free(uris); | |
4054 | goto error; | |
4055 | } | |
4056 | ||
4057 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4058 | DBG("Creating session with ONE network URI is a bad call"); | |
4059 | ret = LTTNG_ERR_SESSION_FAIL; | |
4060 | free(uris); | |
4061 | goto error; | |
4062 | } | |
4063 | } | |
4064 | ||
4065 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
4066 | nb_uri, &cmd_ctx->creds); | |
4067 | free(uris); | |
4068 | break; | |
4069 | } | |
ecc48a90 JD |
4070 | case LTTNG_CREATE_SESSION_LIVE: |
4071 | { | |
4072 | size_t nb_uri, len; | |
4073 | struct lttng_uri *uris = NULL; | |
4074 | ||
4075 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4076 | len = nb_uri * sizeof(struct lttng_uri); | |
4077 | ||
4078 | if (nb_uri > 0) { | |
4079 | uris = zmalloc(len); | |
4080 | if (uris == NULL) { | |
4081 | ret = LTTNG_ERR_FATAL; | |
4082 | goto error; | |
4083 | } | |
4084 | ||
4085 | /* Receive variable len data */ | |
4086 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
4087 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
4088 | if (ret <= 0) { | |
4089 | DBG("No URIs received from client... continuing"); | |
4090 | *sock_error = 1; | |
4091 | ret = LTTNG_ERR_SESSION_FAIL; | |
4092 | free(uris); | |
4093 | goto error; | |
4094 | } | |
4095 | ||
4096 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4097 | DBG("Creating session with ONE network URI is a bad call"); | |
4098 | ret = LTTNG_ERR_SESSION_FAIL; | |
4099 | free(uris); | |
4100 | goto error; | |
4101 | } | |
4102 | } | |
4103 | ||
4104 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
4105 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
4106 | free(uris); | |
4107 | break; | |
4108 | } | |
fb198a11 JG |
4109 | case LTTNG_SAVE_SESSION: |
4110 | { | |
4111 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
4112 | &cmd_ctx->creds); | |
4113 | break; | |
4114 | } | |
d7ba1388 MD |
4115 | case LTTNG_SET_SESSION_SHM_PATH: |
4116 | { | |
4117 | ret = cmd_set_session_shm_path(cmd_ctx->session, | |
4118 | cmd_ctx->lsm->u.set_shm_path.shm_path); | |
4119 | break; | |
4120 | } | |
eded6438 | 4121 | case LTTNG_REGENERATE_METADATA: |
93ec662e | 4122 | { |
eded6438 | 4123 | ret = cmd_regenerate_metadata(cmd_ctx->session); |
93ec662e JD |
4124 | break; |
4125 | } | |
c2561365 JD |
4126 | case LTTNG_REGENERATE_STATEDUMP: |
4127 | { | |
4128 | ret = cmd_regenerate_statedump(cmd_ctx->session); | |
4129 | break; | |
4130 | } | |
db671df9 JG |
4131 | case LTTNG_REGISTER_TRIGGER: |
4132 | { | |
4133 | ret = cmd_register_trigger(cmd_ctx, sock); | |
4134 | break; | |
4135 | } | |
5e16da05 | 4136 | default: |
f73fabfd | 4137 | ret = LTTNG_ERR_UND; |
5461b305 | 4138 | break; |
fac6795d DG |
4139 | } |
4140 | ||
5461b305 | 4141 | error: |
5461b305 DG |
4142 | if (cmd_ctx->llm == NULL) { |
4143 | DBG("Missing llm structure. Allocating one."); | |
6e10c9b9 | 4144 | if (setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0) < 0) { |
5461b305 DG |
4145 | goto setup_error; |
4146 | } | |
4147 | } | |
54d01ffb | 4148 | /* Set return code */ |
5461b305 | 4149 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 4150 | setup_error: |
b5541356 | 4151 | if (cmd_ctx->session) { |
54d01ffb | 4152 | session_unlock(cmd_ctx->session); |
b5541356 | 4153 | } |
256a5576 MD |
4154 | if (need_tracing_session) { |
4155 | session_unlock_list(); | |
4156 | } | |
54d01ffb | 4157 | init_setup_error: |
3745d315 | 4158 | assert(!rcu_read_ongoing()); |
8028d920 | 4159 | return ret; |
fac6795d DG |
4160 | } |
4161 | ||
44a5e5eb DG |
4162 | /* |
4163 | * Thread managing health check socket. | |
4164 | */ | |
4165 | static void *thread_manage_health(void *data) | |
4166 | { | |
eb4a2943 | 4167 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
4168 | uint32_t revents, nb_fd; |
4169 | struct lttng_poll_event events; | |
0c89d795 MD |
4170 | struct health_comm_msg msg; |
4171 | struct health_comm_reply reply; | |
44a5e5eb DG |
4172 | |
4173 | DBG("[thread] Manage health check started"); | |
4174 | ||
4175 | rcu_register_thread(); | |
4176 | ||
6d737ce4 DG |
4177 | /* We might hit an error path before this is created. */ |
4178 | lttng_poll_init(&events); | |
3cc04881 | 4179 | |
44a5e5eb DG |
4180 | /* Create unix socket */ |
4181 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
4182 | if (sock < 0) { | |
4183 | ERR("Unable to create health check Unix socket"); | |
44a5e5eb DG |
4184 | goto error; |
4185 | } | |
4186 | ||
6c71277b MD |
4187 | if (is_root) { |
4188 | /* lttng health client socket path permissions */ | |
4189 | ret = chown(health_unix_sock_path, 0, | |
4190 | utils_get_group_id(tracing_group_name)); | |
4191 | if (ret < 0) { | |
4192 | ERR("Unable to set group on %s", health_unix_sock_path); | |
4193 | PERROR("chown"); | |
6c71277b MD |
4194 | goto error; |
4195 | } | |
4196 | ||
4197 | ret = chmod(health_unix_sock_path, | |
4198 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4199 | if (ret < 0) { | |
4200 | ERR("Unable to set permissions on %s", health_unix_sock_path); | |
4201 | PERROR("chmod"); | |
6c71277b MD |
4202 | goto error; |
4203 | } | |
4204 | } | |
4205 | ||
b662582b DG |
4206 | /* |
4207 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4208 | * show must go on. | |
4209 | */ | |
4210 | (void) utils_set_fd_cloexec(sock); | |
4211 | ||
44a5e5eb DG |
4212 | ret = lttcomm_listen_unix_sock(sock); |
4213 | if (ret < 0) { | |
4214 | goto error; | |
4215 | } | |
4216 | ||
4217 | /* | |
4218 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4219 | * more will be added to this poll set. | |
4220 | */ | |
d0b96690 | 4221 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
4222 | if (ret < 0) { |
4223 | goto error; | |
4224 | } | |
4225 | ||
4226 | /* Add the application registration socket */ | |
4227 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
4228 | if (ret < 0) { | |
4229 | goto error; | |
4230 | } | |
4231 | ||
ef367a93 | 4232 | sessiond_notify_ready(); |
97bc1426 | 4233 | |
44a5e5eb DG |
4234 | while (1) { |
4235 | DBG("Health check ready"); | |
4236 | ||
44a5e5eb DG |
4237 | /* Inifinite blocking call, waiting for transmission */ |
4238 | restart: | |
4239 | ret = lttng_poll_wait(&events, -1); | |
4240 | if (ret < 0) { | |
4241 | /* | |
4242 | * Restart interrupted system call. | |
4243 | */ | |
4244 | if (errno == EINTR) { | |
4245 | goto restart; | |
4246 | } | |
4247 | goto error; | |
4248 | } | |
4249 | ||
0d9c5d77 DG |
4250 | nb_fd = ret; |
4251 | ||
44a5e5eb DG |
4252 | for (i = 0; i < nb_fd; i++) { |
4253 | /* Fetch once the poll data */ | |
4254 | revents = LTTNG_POLL_GETEV(&events, i); | |
4255 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4256 | ||
fd20dac9 MD |
4257 | if (!revents) { |
4258 | /* No activity for this FD (poll implementation). */ | |
4259 | continue; | |
4260 | } | |
4261 | ||
44a5e5eb | 4262 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4263 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 4264 | if (ret) { |
139ac872 MD |
4265 | err = 0; |
4266 | goto exit; | |
44a5e5eb DG |
4267 | } |
4268 | ||
4269 | /* Event on the registration socket */ | |
4270 | if (pollfd == sock) { | |
03e43155 MD |
4271 | if (revents & LPOLLIN) { |
4272 | continue; | |
4273 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
44a5e5eb DG |
4274 | ERR("Health socket poll error"); |
4275 | goto error; | |
03e43155 MD |
4276 | } else { |
4277 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4278 | goto error; | |
44a5e5eb DG |
4279 | } |
4280 | } | |
4281 | } | |
4282 | ||
4283 | new_sock = lttcomm_accept_unix_sock(sock); | |
4284 | if (new_sock < 0) { | |
4285 | goto error; | |
4286 | } | |
4287 | ||
b662582b DG |
4288 | /* |
4289 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4290 | * show must go on. | |
4291 | */ | |
4292 | (void) utils_set_fd_cloexec(new_sock); | |
4293 | ||
44a5e5eb DG |
4294 | DBG("Receiving data from client for health..."); |
4295 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
4296 | if (ret <= 0) { | |
4297 | DBG("Nothing recv() from client... continuing"); | |
4298 | ret = close(new_sock); | |
4299 | if (ret) { | |
4300 | PERROR("close"); | |
4301 | } | |
44a5e5eb DG |
4302 | continue; |
4303 | } | |
4304 | ||
4305 | rcu_thread_online(); | |
4306 | ||
53efb85a | 4307 | memset(&reply, 0, sizeof(reply)); |
6c71277b MD |
4308 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { |
4309 | /* | |
4310 | * health_check_state returns 0 if health is | |
4311 | * bad. | |
4312 | */ | |
4313 | if (!health_check_state(health_sessiond, i)) { | |
4314 | reply.ret_code |= 1ULL << i; | |
4315 | } | |
44a5e5eb DG |
4316 | } |
4317 | ||
6c71277b | 4318 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
4319 | |
4320 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
4321 | if (ret < 0) { | |
4322 | ERR("Failed to send health data back to client"); | |
4323 | } | |
4324 | ||
4325 | /* End of transmission */ | |
4326 | ret = close(new_sock); | |
4327 | if (ret) { | |
4328 | PERROR("close"); | |
4329 | } | |
44a5e5eb DG |
4330 | } |
4331 | ||
139ac872 | 4332 | exit: |
44a5e5eb | 4333 | error: |
139ac872 MD |
4334 | if (err) { |
4335 | ERR("Health error occurred in %s", __func__); | |
4336 | } | |
44a5e5eb DG |
4337 | DBG("Health check thread dying"); |
4338 | unlink(health_unix_sock_path); | |
4339 | if (sock >= 0) { | |
4340 | ret = close(sock); | |
4341 | if (ret) { | |
4342 | PERROR("close"); | |
4343 | } | |
4344 | } | |
44a5e5eb DG |
4345 | |
4346 | lttng_poll_clean(&events); | |
b11d6a7f | 4347 | stop_threads(); |
44a5e5eb DG |
4348 | rcu_unregister_thread(); |
4349 | return NULL; | |
4350 | } | |
4351 | ||
1d4b027a | 4352 | /* |
d063d709 DG |
4353 | * This thread manage all clients request using the unix client socket for |
4354 | * communication. | |
1d4b027a DG |
4355 | */ |
4356 | static void *thread_manage_clients(void *data) | |
4357 | { | |
139ac872 | 4358 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 4359 | int sock_error; |
5eb91c98 | 4360 | uint32_t revents, nb_fd; |
273ea72c | 4361 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 4362 | struct lttng_poll_event events; |
1d4b027a DG |
4363 | |
4364 | DBG("[thread] Manage client started"); | |
4365 | ||
f6a9efaa DG |
4366 | rcu_register_thread(); |
4367 | ||
6c71277b | 4368 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 4369 | |
840cb59c | 4370 | health_code_update(); |
44a5e5eb | 4371 | |
1d4b027a DG |
4372 | ret = lttcomm_listen_unix_sock(client_sock); |
4373 | if (ret < 0) { | |
35df2755 | 4374 | goto error_listen; |
1d4b027a DG |
4375 | } |
4376 | ||
5eb91c98 DG |
4377 | /* |
4378 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4379 | * more will be added to this poll set. | |
4380 | */ | |
d0b96690 | 4381 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 4382 | if (ret < 0) { |
35df2755 | 4383 | goto error_create_poll; |
5eb91c98 | 4384 | } |
273ea72c | 4385 | |
5eb91c98 DG |
4386 | /* Add the application registration socket */ |
4387 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
4388 | if (ret < 0) { | |
4389 | goto error; | |
4390 | } | |
273ea72c | 4391 | |
ef367a93 JG |
4392 | sessiond_notify_ready(); |
4393 | ret = sem_post(&load_info->message_thread_ready); | |
4394 | if (ret) { | |
4395 | PERROR("sem_post message_thread_ready"); | |
4396 | goto error; | |
4397 | } | |
0bb7724a | 4398 | |
72453c8c MD |
4399 | /* This testpoint is after we signal readiness to the parent. */ |
4400 | if (testpoint(sessiond_thread_manage_clients)) { | |
4401 | goto error; | |
4402 | } | |
4403 | ||
e547b070 | 4404 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
4405 | goto error; |
4406 | } | |
8ac94142 | 4407 | |
840cb59c | 4408 | health_code_update(); |
44a5e5eb | 4409 | |
1d4b027a | 4410 | while (1) { |
1d4b027a | 4411 | DBG("Accepting client command ..."); |
273ea72c DG |
4412 | |
4413 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 4414 | restart: |
a78af745 | 4415 | health_poll_entry(); |
5eb91c98 | 4416 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 4417 | health_poll_exit(); |
273ea72c | 4418 | if (ret < 0) { |
88f2b785 MD |
4419 | /* |
4420 | * Restart interrupted system call. | |
4421 | */ | |
4422 | if (errno == EINTR) { | |
4423 | goto restart; | |
4424 | } | |
273ea72c DG |
4425 | goto error; |
4426 | } | |
4427 | ||
0d9c5d77 DG |
4428 | nb_fd = ret; |
4429 | ||
5eb91c98 DG |
4430 | for (i = 0; i < nb_fd; i++) { |
4431 | /* Fetch once the poll data */ | |
4432 | revents = LTTNG_POLL_GETEV(&events, i); | |
4433 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4434 | ||
840cb59c | 4435 | health_code_update(); |
44a5e5eb | 4436 | |
fd20dac9 MD |
4437 | if (!revents) { |
4438 | /* No activity for this FD (poll implementation). */ | |
4439 | continue; | |
4440 | } | |
4441 | ||
5eb91c98 | 4442 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4443 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 4444 | if (ret) { |
139ac872 MD |
4445 | err = 0; |
4446 | goto exit; | |
5eb91c98 DG |
4447 | } |
4448 | ||
4449 | /* Event on the registration socket */ | |
4450 | if (pollfd == client_sock) { | |
03e43155 MD |
4451 | if (revents & LPOLLIN) { |
4452 | continue; | |
4453 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
5eb91c98 DG |
4454 | ERR("Client socket poll error"); |
4455 | goto error; | |
03e43155 MD |
4456 | } else { |
4457 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4458 | goto error; | |
5eb91c98 DG |
4459 | } |
4460 | } | |
4461 | } | |
4462 | ||
4463 | DBG("Wait for client response"); | |
4464 | ||
840cb59c | 4465 | health_code_update(); |
44a5e5eb | 4466 | |
5eb91c98 DG |
4467 | sock = lttcomm_accept_unix_sock(client_sock); |
4468 | if (sock < 0) { | |
273ea72c | 4469 | goto error; |
273ea72c DG |
4470 | } |
4471 | ||
b662582b DG |
4472 | /* |
4473 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4474 | * show must go on. | |
4475 | */ | |
4476 | (void) utils_set_fd_cloexec(sock); | |
4477 | ||
be040666 DG |
4478 | /* Set socket option for credentials retrieval */ |
4479 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
4480 | if (ret < 0) { | |
4481 | goto error; | |
4482 | } | |
4483 | ||
5eb91c98 | 4484 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 4485 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 4486 | if (cmd_ctx == NULL) { |
76d7553f | 4487 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 4488 | goto error; |
5eb91c98 | 4489 | } |
1d4b027a | 4490 | |
5eb91c98 | 4491 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 4492 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 4493 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 4494 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
4495 | goto error; |
4496 | } | |
1d4b027a | 4497 | |
5eb91c98 DG |
4498 | cmd_ctx->llm = NULL; |
4499 | cmd_ctx->session = NULL; | |
1d4b027a | 4500 | |
840cb59c | 4501 | health_code_update(); |
44a5e5eb | 4502 | |
5eb91c98 DG |
4503 | /* |
4504 | * Data is received from the lttng client. The struct | |
4505 | * lttcomm_session_msg (lsm) contains the command and data request of | |
4506 | * the client. | |
4507 | */ | |
4508 | DBG("Receiving data from client ..."); | |
be040666 DG |
4509 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
4510 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
4511 | if (ret <= 0) { |
4512 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
4513 | ret = close(sock); |
4514 | if (ret) { | |
4515 | PERROR("close"); | |
4516 | } | |
4517 | sock = -1; | |
a2c0da86 | 4518 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4519 | continue; |
4520 | } | |
1d4b027a | 4521 | |
840cb59c | 4522 | health_code_update(); |
44a5e5eb | 4523 | |
5eb91c98 DG |
4524 | // TODO: Validate cmd_ctx including sanity check for |
4525 | // security purpose. | |
f7776ea7 | 4526 | |
f6a9efaa | 4527 | rcu_thread_online(); |
5eb91c98 DG |
4528 | /* |
4529 | * This function dispatch the work to the kernel or userspace tracer | |
4530 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
4531 | * informations for the client. The command context struct contains | |
4532 | * everything this function may needs. | |
4533 | */ | |
53a80697 | 4534 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 4535 | rcu_thread_offline(); |
5eb91c98 | 4536 | if (ret < 0) { |
36134aa1 DG |
4537 | ret = close(sock); |
4538 | if (ret) { | |
4539 | PERROR("close"); | |
53a80697 | 4540 | } |
36134aa1 | 4541 | sock = -1; |
bbd973c2 | 4542 | /* |
5eb91c98 | 4543 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 4544 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
4545 | * (ENOMEM). Error detected but still accept |
4546 | * command, unless a socket error has been | |
4547 | * detected. | |
bbd973c2 | 4548 | */ |
bbd973c2 | 4549 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4550 | continue; |
4551 | } | |
d6e4fca4 | 4552 | |
840cb59c | 4553 | health_code_update(); |
44a5e5eb | 4554 | |
a1ac8b97 | 4555 | DBG("Sending response (size: %d, retcode: %s (%d))", |
54d01ffb | 4556 | cmd_ctx->lttng_msg_size, |
a1ac8b97 JG |
4557 | lttng_strerror(-cmd_ctx->llm->ret_code), |
4558 | cmd_ctx->llm->ret_code); | |
54d01ffb | 4559 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
4560 | if (ret < 0) { |
4561 | ERR("Failed to send data back to client"); | |
bbd973c2 | 4562 | } |
1d4b027a | 4563 | |
5eb91c98 | 4564 | /* End of transmission */ |
76d7553f MD |
4565 | ret = close(sock); |
4566 | if (ret) { | |
4567 | PERROR("close"); | |
4568 | } | |
4569 | sock = -1; | |
be040666 DG |
4570 | |
4571 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 4572 | |
840cb59c | 4573 | health_code_update(); |
273ea72c DG |
4574 | } |
4575 | ||
139ac872 | 4576 | exit: |
5eb91c98 | 4577 | error: |
35df2755 CB |
4578 | if (sock >= 0) { |
4579 | ret = close(sock); | |
4580 | if (ret) { | |
4581 | PERROR("close"); | |
4582 | } | |
139ac872 | 4583 | } |
44a5e5eb | 4584 | |
35df2755 CB |
4585 | lttng_poll_clean(&events); |
4586 | clean_command_ctx(&cmd_ctx); | |
4587 | ||
4588 | error_listen: | |
4589 | error_create_poll: | |
273ea72c | 4590 | unlink(client_unix_sock_path); |
76d7553f MD |
4591 | if (client_sock >= 0) { |
4592 | ret = close(client_sock); | |
4593 | if (ret) { | |
4594 | PERROR("close"); | |
4595 | } | |
a4b35e07 | 4596 | } |
35df2755 CB |
4597 | |
4598 | if (err) { | |
840cb59c | 4599 | health_error(); |
35df2755 | 4600 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4601 | } |
273ea72c | 4602 | |
8782cc74 | 4603 | health_unregister(health_sessiond); |
35df2755 CB |
4604 | |
4605 | DBG("Client thread dying"); | |
f6a9efaa DG |
4606 | |
4607 | rcu_unregister_thread(); | |
4a15001e MD |
4608 | |
4609 | /* | |
4610 | * Since we are creating the consumer threads, we own them, so we need | |
4611 | * to join them before our thread exits. | |
4612 | */ | |
4613 | ret = join_consumer_thread(&kconsumer_data); | |
4614 | if (ret) { | |
4615 | errno = ret; | |
4616 | PERROR("join_consumer"); | |
4617 | } | |
4618 | ||
4619 | ret = join_consumer_thread(&ustconsumer32_data); | |
4620 | if (ret) { | |
4621 | errno = ret; | |
4622 | PERROR("join_consumer ust32"); | |
4623 | } | |
4624 | ||
4625 | ret = join_consumer_thread(&ustconsumer64_data); | |
4626 | if (ret) { | |
4627 | errno = ret; | |
4628 | PERROR("join_consumer ust64"); | |
4629 | } | |
1d4b027a DG |
4630 | return NULL; |
4631 | } | |
4632 | ||
c0232ea5 JG |
4633 | static int string_match(const char *str1, const char *str2) |
4634 | { | |
4635 | return (str1 && str2) && !strcmp(str1, str2); | |
4636 | } | |
4637 | ||
fac6795d | 4638 | /* |
26296c48 JG |
4639 | * Take an option from the getopt output and set it in the right variable to be |
4640 | * used later. | |
4641 | * | |
4642 | * Return 0 on success else a negative value. | |
fac6795d | 4643 | */ |
26296c48 | 4644 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4645 | { |
26296c48 | 4646 | int ret = 0; |
fac6795d | 4647 | |
c0232ea5 | 4648 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
4649 | if (!arg || *arg == '\0') { |
4650 | ret = -EINVAL; | |
4651 | goto end; | |
4652 | } | |
e8fa9fb0 MD |
4653 | if (lttng_is_setuid_setgid()) { |
4654 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4655 | "-c, --client-sock"); | |
4656 | } else { | |
4657 | snprintf(client_unix_sock_path, PATH_MAX, "%s", arg); | |
4658 | } | |
c0232ea5 | 4659 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
4660 | if (!arg || *arg == '\0') { |
4661 | ret = -EINVAL; | |
4662 | goto end; | |
4663 | } | |
e8fa9fb0 MD |
4664 | if (lttng_is_setuid_setgid()) { |
4665 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4666 | "-a, --apps-sock"); | |
4667 | } else { | |
4668 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", arg); | |
4669 | } | |
c0232ea5 | 4670 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
26296c48 | 4671 | opt_daemon = 1; |
c0232ea5 | 4672 | } else if (string_match(optname, "background") || opt == 'b') { |
72dd7491 | 4673 | opt_background = 1; |
c0232ea5 | 4674 | } else if (string_match(optname, "group") || opt == 'g') { |
66b2ce8e JG |
4675 | if (!arg || *arg == '\0') { |
4676 | ret = -EINVAL; | |
4677 | goto end; | |
4678 | } | |
e8fa9fb0 MD |
4679 | if (lttng_is_setuid_setgid()) { |
4680 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4681 | "-g, --group"); | |
4682 | } else { | |
4683 | /* | |
4684 | * If the override option is set, the pointer points to a | |
4685 | * *non* const thus freeing it even though the variable type is | |
4686 | * set to const. | |
4687 | */ | |
4688 | if (tracing_group_name_override) { | |
4689 | free((void *) tracing_group_name); | |
4690 | } | |
4691 | tracing_group_name = strdup(arg); | |
4692 | if (!tracing_group_name) { | |
4693 | PERROR("strdup"); | |
4694 | ret = -ENOMEM; | |
4695 | } | |
4696 | tracing_group_name_override = 1; | |
db322c4d | 4697 | } |
c0232ea5 | 4698 | } else if (string_match(optname, "help") || opt == 'h') { |
8190767e PP |
4699 | ret = utils_show_man_page(8, "lttng-sessiond"); |
4700 | if (ret) { | |
4701 | ERR("Cannot view man page lttng-sessiond(8)"); | |
4702 | perror("exec"); | |
4703 | } | |
4704 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 4705 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
4706 | fprintf(stdout, "%s\n", VERSION); |
4707 | exit(EXIT_SUCCESS); | |
c0232ea5 | 4708 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
26296c48 | 4709 | opt_sig_parent = 1; |
c0232ea5 | 4710 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
66b2ce8e JG |
4711 | if (!arg || *arg == '\0') { |
4712 | ret = -EINVAL; | |
4713 | goto end; | |
4714 | } | |
e8fa9fb0 MD |
4715 | if (lttng_is_setuid_setgid()) { |
4716 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4717 | "--kconsumerd-err-sock"); | |
4718 | } else { | |
4719 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4720 | } | |
c0232ea5 | 4721 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
4722 | if (!arg || *arg == '\0') { |
4723 | ret = -EINVAL; | |
4724 | goto end; | |
4725 | } | |
e8fa9fb0 MD |
4726 | if (lttng_is_setuid_setgid()) { |
4727 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4728 | "--kconsumerd-cmd-sock"); | |
4729 | } else { | |
4730 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4731 | } | |
c0232ea5 | 4732 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e JG |
4733 | if (!arg || *arg == '\0') { |
4734 | ret = -EINVAL; | |
4735 | goto end; | |
4736 | } | |
e8fa9fb0 MD |
4737 | if (lttng_is_setuid_setgid()) { |
4738 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4739 | "--ustconsumerd64-err-sock"); | |
4740 | } else { | |
4741 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4742 | } | |
c0232ea5 | 4743 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
66b2ce8e JG |
4744 | if (!arg || *arg == '\0') { |
4745 | ret = -EINVAL; | |
4746 | goto end; | |
4747 | } | |
e8fa9fb0 MD |
4748 | if (lttng_is_setuid_setgid()) { |
4749 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4750 | "--ustconsumerd64-cmd-sock"); | |
4751 | } else { | |
4752 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4753 | } | |
c0232ea5 | 4754 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
66b2ce8e JG |
4755 | if (!arg || *arg == '\0') { |
4756 | ret = -EINVAL; | |
4757 | goto end; | |
4758 | } | |
e8fa9fb0 MD |
4759 | if (lttng_is_setuid_setgid()) { |
4760 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4761 | "--ustconsumerd32-err-sock"); | |
4762 | } else { | |
4763 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4764 | } | |
c0232ea5 | 4765 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
66b2ce8e JG |
4766 | if (!arg || *arg == '\0') { |
4767 | ret = -EINVAL; | |
4768 | goto end; | |
4769 | } | |
e8fa9fb0 MD |
4770 | if (lttng_is_setuid_setgid()) { |
4771 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4772 | "--ustconsumerd32-cmd-sock"); | |
4773 | } else { | |
4774 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4775 | } | |
c0232ea5 | 4776 | } else if (string_match(optname, "no-kernel")) { |
26296c48 | 4777 | opt_no_kernel = 1; |
c0232ea5 | 4778 | } else if (string_match(optname, "quiet") || opt == 'q') { |
26296c48 | 4779 | lttng_opt_quiet = 1; |
c0232ea5 | 4780 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
4781 | /* Verbose level can increase using multiple -v */ |
4782 | if (arg) { | |
13755a18 | 4783 | /* Value obtained from config file */ |
26296c48 JG |
4784 | lttng_opt_verbose = config_parse_value(arg); |
4785 | } else { | |
13755a18 JG |
4786 | /* -v used on command line */ |
4787 | lttng_opt_verbose++; | |
26296c48 | 4788 | } |
13755a18 JG |
4789 | /* Clamp value to [0, 3] */ |
4790 | lttng_opt_verbose = lttng_opt_verbose < 0 ? 0 : | |
4791 | (lttng_opt_verbose <= 3 ? lttng_opt_verbose : 3); | |
c0232ea5 | 4792 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 JG |
4793 | if (arg) { |
4794 | opt_verbose_consumer = config_parse_value(arg); | |
4795 | } else { | |
ca939de8 | 4796 | opt_verbose_consumer++; |
26296c48 | 4797 | } |
c0232ea5 | 4798 | } else if (string_match(optname, "consumerd32-path")) { |
66b2ce8e JG |
4799 | if (!arg || *arg == '\0') { |
4800 | ret = -EINVAL; | |
4801 | goto end; | |
4802 | } | |
e8fa9fb0 MD |
4803 | if (lttng_is_setuid_setgid()) { |
4804 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4805 | "--consumerd32-path"); | |
4806 | } else { | |
4807 | if (consumerd32_bin_override) { | |
4808 | free((void *) consumerd32_bin); | |
4809 | } | |
4810 | consumerd32_bin = strdup(arg); | |
4811 | if (!consumerd32_bin) { | |
4812 | PERROR("strdup"); | |
4813 | ret = -ENOMEM; | |
4814 | } | |
4815 | consumerd32_bin_override = 1; | |
db322c4d | 4816 | } |
c0232ea5 | 4817 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
4818 | if (!arg || *arg == '\0') { |
4819 | ret = -EINVAL; | |
4820 | goto end; | |
4821 | } | |
e8fa9fb0 MD |
4822 | if (lttng_is_setuid_setgid()) { |
4823 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4824 | "--consumerd32-libdir"); | |
4825 | } else { | |
4826 | if (consumerd32_libdir_override) { | |
4827 | free((void *) consumerd32_libdir); | |
4828 | } | |
4829 | consumerd32_libdir = strdup(arg); | |
4830 | if (!consumerd32_libdir) { | |
4831 | PERROR("strdup"); | |
4832 | ret = -ENOMEM; | |
4833 | } | |
4834 | consumerd32_libdir_override = 1; | |
db322c4d | 4835 | } |
c0232ea5 | 4836 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
4837 | if (!arg || *arg == '\0') { |
4838 | ret = -EINVAL; | |
4839 | goto end; | |
4840 | } | |
e8fa9fb0 MD |
4841 | if (lttng_is_setuid_setgid()) { |
4842 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4843 | "--consumerd64-path"); | |
4844 | } else { | |
4845 | if (consumerd64_bin_override) { | |
4846 | free((void *) consumerd64_bin); | |
4847 | } | |
4848 | consumerd64_bin = strdup(arg); | |
4849 | if (!consumerd64_bin) { | |
4850 | PERROR("strdup"); | |
4851 | ret = -ENOMEM; | |
4852 | } | |
4853 | consumerd64_bin_override = 1; | |
db322c4d | 4854 | } |
c0232ea5 | 4855 | } else if (string_match(optname, "consumerd64-libdir")) { |
66b2ce8e JG |
4856 | if (!arg || *arg == '\0') { |
4857 | ret = -EINVAL; | |
4858 | goto end; | |
4859 | } | |
e8fa9fb0 MD |
4860 | if (lttng_is_setuid_setgid()) { |
4861 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4862 | "--consumerd64-libdir"); | |
4863 | } else { | |
4864 | if (consumerd64_libdir_override) { | |
4865 | free((void *) consumerd64_libdir); | |
4866 | } | |
4867 | consumerd64_libdir = strdup(arg); | |
4868 | if (!consumerd64_libdir) { | |
4869 | PERROR("strdup"); | |
4870 | ret = -ENOMEM; | |
4871 | } | |
4872 | consumerd64_libdir_override = 1; | |
db322c4d | 4873 | } |
c0232ea5 | 4874 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
66b2ce8e JG |
4875 | if (!arg || *arg == '\0') { |
4876 | ret = -EINVAL; | |
4877 | goto end; | |
4878 | } | |
e8fa9fb0 MD |
4879 | if (lttng_is_setuid_setgid()) { |
4880 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4881 | "-p, --pidfile"); | |
4882 | } else { | |
4883 | free(opt_pidfile); | |
4884 | opt_pidfile = strdup(arg); | |
4885 | if (!opt_pidfile) { | |
4886 | PERROR("strdup"); | |
4887 | ret = -ENOMEM; | |
4888 | } | |
db322c4d | 4889 | } |
c0232ea5 | 4890 | } else if (string_match(optname, "agent-tcp-port")) { |
66b2ce8e JG |
4891 | if (!arg || *arg == '\0') { |
4892 | ret = -EINVAL; | |
4893 | goto end; | |
4894 | } | |
e8fa9fb0 MD |
4895 | if (lttng_is_setuid_setgid()) { |
4896 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4897 | "--agent-tcp-port"); | |
4898 | } else { | |
4899 | unsigned long v; | |
4d076222 | 4900 | |
e8fa9fb0 MD |
4901 | errno = 0; |
4902 | v = strtoul(arg, NULL, 0); | |
4903 | if (errno != 0 || !isdigit(arg[0])) { | |
4904 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
4905 | return -1; | |
4906 | } | |
4907 | if (v == 0 || v >= 65535) { | |
4908 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
4909 | return -1; | |
4910 | } | |
4911 | agent_tcp_port = (uint32_t) v; | |
4912 | DBG3("Agent TCP port set to non default: %u", agent_tcp_port); | |
26296c48 | 4913 | } |
c0232ea5 | 4914 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
4915 | if (!arg || *arg == '\0') { |
4916 | ret = -EINVAL; | |
4917 | goto end; | |
4918 | } | |
e8fa9fb0 MD |
4919 | if (lttng_is_setuid_setgid()) { |
4920 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4921 | "-l, --load"); | |
4922 | } else { | |
4923 | free(opt_load_session_path); | |
4924 | opt_load_session_path = strdup(arg); | |
4925 | if (!opt_load_session_path) { | |
4926 | PERROR("strdup"); | |
4927 | ret = -ENOMEM; | |
4928 | } | |
ef367a93 | 4929 | } |
c0232ea5 | 4930 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
4931 | if (!arg || *arg == '\0') { |
4932 | ret = -EINVAL; | |
4933 | goto end; | |
4934 | } | |
e8fa9fb0 MD |
4935 | if (lttng_is_setuid_setgid()) { |
4936 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4937 | "--kmod-probes"); | |
4938 | } else { | |
4939 | free(kmod_probes_list); | |
4940 | kmod_probes_list = strdup(arg); | |
4941 | if (!kmod_probes_list) { | |
4942 | PERROR("strdup"); | |
4943 | ret = -ENOMEM; | |
4944 | } | |
c9d42407 | 4945 | } |
c0232ea5 | 4946 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
4947 | if (!arg || *arg == '\0') { |
4948 | ret = -EINVAL; | |
4949 | goto end; | |
4950 | } | |
e8fa9fb0 MD |
4951 | if (lttng_is_setuid_setgid()) { |
4952 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4953 | "--extra-kmod-probes"); | |
4954 | } else { | |
4955 | free(kmod_extra_probes_list); | |
4956 | kmod_extra_probes_list = strdup(arg); | |
4957 | if (!kmod_extra_probes_list) { | |
4958 | PERROR("strdup"); | |
4959 | ret = -ENOMEM; | |
4960 | } | |
db322c4d | 4961 | } |
c0232ea5 JG |
4962 | } else if (string_match(optname, "config") || opt == 'f') { |
4963 | /* This is handled in set_options() thus silent skip. */ | |
4964 | goto end; | |
4965 | } else { | |
26296c48 JG |
4966 | /* Unknown option or other error. |
4967 | * Error is printed by getopt, just return */ | |
4968 | ret = -1; | |
4969 | } | |
4970 | ||
f3dd7ce7 | 4971 | end: |
c5d350b2 JG |
4972 | if (ret == -EINVAL) { |
4973 | const char *opt_name = "unknown"; | |
4974 | int i; | |
4975 | ||
4976 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
4977 | i++) { | |
4978 | if (opt == long_options[i].val) { | |
4979 | opt_name = long_options[i].name; | |
4980 | break; | |
4981 | } | |
4982 | } | |
4983 | ||
4984 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
4985 | opt_name); | |
4986 | } | |
f3dd7ce7 | 4987 | |
26296c48 JG |
4988 | return ret; |
4989 | } | |
4990 | ||
4991 | /* | |
4992 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 4993 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
4994 | * return value conventions. |
4995 | */ | |
4996 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
4997 | { | |
4998 | int ret = 0, i; | |
4999 | ||
5000 | if (!entry || !entry->name || !entry->value) { | |
5001 | ret = -EINVAL; | |
5002 | goto end; | |
5003 | } | |
5004 | ||
5005 | /* Check if the option is to be ignored */ | |
5006 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
5007 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
5008 | goto end; | |
5009 | } | |
5010 | } | |
5011 | ||
5012 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
5013 | i++) { | |
5014 | ||
5015 | /* Ignore if not fully matched. */ | |
5016 | if (strcmp(entry->name, long_options[i].name)) { | |
5017 | continue; | |
5018 | } | |
5019 | ||
5020 | /* | |
5021 | * If the option takes no argument on the command line, we have to | |
5022 | * check if the value is "true". We support non-zero numeric values, | |
5023 | * true, on and yes. | |
5024 | */ | |
5025 | if (!long_options[i].has_arg) { | |
5026 | ret = config_parse_value(entry->value); | |
5027 | if (ret <= 0) { | |
5028 | if (ret) { | |
5029 | WARN("Invalid configuration value \"%s\" for option %s", | |
5030 | entry->value, entry->name); | |
5031 | } | |
5032 | /* False, skip boolean config option. */ | |
5033 | goto end; | |
4d076222 | 5034 | } |
26296c48 JG |
5035 | } |
5036 | ||
5037 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
5038 | goto end; | |
5039 | } | |
5040 | ||
5041 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
5042 | ||
5043 | end: | |
5044 | return ret; | |
5045 | } | |
5046 | ||
5047 | /* | |
5048 | * daemon configuration loading and argument parsing | |
5049 | */ | |
5050 | static int set_options(int argc, char **argv) | |
5051 | { | |
5052 | int ret = 0, c = 0, option_index = 0; | |
5053 | int orig_optopt = optopt, orig_optind = optind; | |
5054 | char *optstring; | |
5055 | const char *config_path = NULL; | |
5056 | ||
5057 | optstring = utils_generate_optstring(long_options, | |
5058 | sizeof(long_options) / sizeof(struct option)); | |
5059 | if (!optstring) { | |
5060 | ret = -ENOMEM; | |
5061 | goto end; | |
5062 | } | |
5063 | ||
5064 | /* Check for the --config option */ | |
5065 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
5066 | &option_index)) != -1) { | |
5067 | if (c == '?') { | |
5068 | ret = -EINVAL; | |
5069 | goto end; | |
5070 | } else if (c != 'f') { | |
5071 | /* if not equal to --config option. */ | |
5072 | continue; | |
5073 | } | |
5074 | ||
e8fa9fb0 MD |
5075 | if (lttng_is_setuid_setgid()) { |
5076 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5077 | "-f, --config"); | |
5078 | } else { | |
5079 | config_path = utils_expand_path(optarg); | |
5080 | if (!config_path) { | |
5081 | ERR("Failed to resolve path: %s", optarg); | |
5082 | } | |
26296c48 JG |
5083 | } |
5084 | } | |
5085 | ||
5086 | ret = config_get_section_entries(config_path, config_section_name, | |
5087 | config_entry_handler, NULL); | |
5088 | if (ret) { | |
5089 | if (ret > 0) { | |
5090 | ERR("Invalid configuration option at line %i", ret); | |
5091 | ret = -1; | |
5092 | } | |
5093 | goto end; | |
5094 | } | |
5095 | ||
5096 | /* Reset getopt's global state */ | |
5097 | optopt = orig_optopt; | |
5098 | optind = orig_optind; | |
5099 | while (1) { | |
c0232ea5 JG |
5100 | option_index = -1; |
5101 | /* | |
5102 | * getopt_long() will not set option_index if it encounters a | |
5103 | * short option. | |
5104 | */ | |
5105 | c = getopt_long(argc, argv, optstring, long_options, | |
5106 | &option_index); | |
26296c48 | 5107 | if (c == -1) { |
4d076222 DG |
5108 | break; |
5109 | } | |
26296c48 | 5110 | |
c0232ea5 JG |
5111 | /* |
5112 | * Pass NULL as the long option name if popt left the index | |
5113 | * unset. | |
5114 | */ | |
5115 | ret = set_option(c, optarg, | |
5116 | option_index < 0 ? NULL : | |
5117 | long_options[option_index].name); | |
26296c48 JG |
5118 | if (ret < 0) { |
5119 | break; | |
fac6795d DG |
5120 | } |
5121 | } | |
5122 | ||
26296c48 JG |
5123 | end: |
5124 | free(optstring); | |
5125 | return ret; | |
fac6795d DG |
5126 | } |
5127 | ||
5128 | /* | |
d063d709 | 5129 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
5130 | * apps_sock - The communication socket for all UST apps. |
5131 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 5132 | */ |
cf3af59e | 5133 | static int init_daemon_socket(void) |
fac6795d DG |
5134 | { |
5135 | int ret = 0; | |
5136 | mode_t old_umask; | |
5137 | ||
5138 | old_umask = umask(0); | |
5139 | ||
5140 | /* Create client tool unix socket */ | |
d6f42150 DG |
5141 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
5142 | if (client_sock < 0) { | |
5143 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
5144 | ret = -1; |
5145 | goto end; | |
5146 | } | |
5147 | ||
b662582b DG |
5148 | /* Set the cloexec flag */ |
5149 | ret = utils_set_fd_cloexec(client_sock); | |
5150 | if (ret < 0) { | |
5151 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
5152 | "Continuing but note that the consumer daemon will have a " | |
5153 | "reference to this socket on exec()", client_sock); | |
5154 | } | |
5155 | ||
fac6795d DG |
5156 | /* File permission MUST be 660 */ |
5157 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
5158 | if (ret < 0) { | |
d6f42150 | 5159 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 5160 | PERROR("chmod"); |
fac6795d DG |
5161 | goto end; |
5162 | } | |
5163 | ||
5164 | /* Create the application unix socket */ | |
d6f42150 DG |
5165 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
5166 | if (apps_sock < 0) { | |
5167 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
5168 | ret = -1; |
5169 | goto end; | |
5170 | } | |
5171 | ||
b662582b DG |
5172 | /* Set the cloexec flag */ |
5173 | ret = utils_set_fd_cloexec(apps_sock); | |
5174 | if (ret < 0) { | |
5175 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
5176 | "Continuing but note that the consumer daemon will have a " | |
5177 | "reference to this socket on exec()", apps_sock); | |
5178 | } | |
5179 | ||
d6f42150 | 5180 | /* File permission MUST be 666 */ |
54d01ffb DG |
5181 | ret = chmod(apps_unix_sock_path, |
5182 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 5183 | if (ret < 0) { |
d6f42150 | 5184 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 5185 | PERROR("chmod"); |
fac6795d DG |
5186 | goto end; |
5187 | } | |
5188 | ||
b662582b DG |
5189 | DBG3("Session daemon client socket %d and application socket %d created", |
5190 | client_sock, apps_sock); | |
5191 | ||
fac6795d DG |
5192 | end: |
5193 | umask(old_umask); | |
5194 | return ret; | |
5195 | } | |
5196 | ||
5197 | /* | |
54d01ffb DG |
5198 | * Check if the global socket is available, and if a daemon is answering at the |
5199 | * other side. If yes, error is returned. | |
fac6795d | 5200 | */ |
cf3af59e | 5201 | static int check_existing_daemon(void) |
fac6795d | 5202 | { |
7d8234d9 | 5203 | /* Is there anybody out there ? */ |
099e26bd | 5204 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 5205 | return -EEXIST; |
099e26bd | 5206 | } |
b09c7c76 DG |
5207 | |
5208 | return 0; | |
fac6795d DG |
5209 | } |
5210 | ||
fac6795d | 5211 | /* |
d063d709 | 5212 | * Set the tracing group gid onto the client socket. |
5e16da05 | 5213 | * |
d063d709 | 5214 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 5215 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 5216 | */ |
be040666 | 5217 | static int set_permissions(char *rundir) |
fac6795d DG |
5218 | { |
5219 | int ret; | |
996b65c8 | 5220 | gid_t gid; |
fac6795d | 5221 | |
6c71277b | 5222 | gid = utils_get_group_id(tracing_group_name); |
fac6795d | 5223 | |
d6f42150 | 5224 | /* Set lttng run dir */ |
be040666 | 5225 | ret = chown(rundir, 0, gid); |
d6f42150 | 5226 | if (ret < 0) { |
be040666 | 5227 | ERR("Unable to set group on %s", rundir); |
76d7553f | 5228 | PERROR("chown"); |
d6f42150 DG |
5229 | } |
5230 | ||
6c71277b MD |
5231 | /* |
5232 | * Ensure all applications and tracing group can search the run | |
5233 | * dir. Allow everyone to read the directory, since it does not | |
5234 | * buy us anything to hide its content. | |
5235 | */ | |
5236 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
5237 | if (ret < 0) { |
5238 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 5239 | PERROR("chmod"); |
d1613cf5 JN |
5240 | } |
5241 | ||
d6f42150 | 5242 | /* lttng client socket path */ |
996b65c8 | 5243 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 5244 | if (ret < 0) { |
d6f42150 | 5245 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 5246 | PERROR("chown"); |
d6f42150 DG |
5247 | } |
5248 | ||
3bd1e081 | 5249 | /* kconsumer error socket path */ |
6c71277b | 5250 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 5251 | if (ret < 0) { |
3bd1e081 | 5252 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 5253 | PERROR("chown"); |
3bd1e081 MD |
5254 | } |
5255 | ||
7753dea8 | 5256 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 5257 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
5258 | if (ret < 0) { |
5259 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 5260 | PERROR("chown"); |
7753dea8 MD |
5261 | } |
5262 | ||
5263 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 5264 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 5265 | if (ret < 0) { |
7753dea8 | 5266 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 5267 | PERROR("chown"); |
fac6795d DG |
5268 | } |
5269 | ||
d6f42150 | 5270 | DBG("All permissions are set"); |
e07ae692 | 5271 | |
fac6795d DG |
5272 | return ret; |
5273 | } | |
5274 | ||
d6f42150 | 5275 | /* |
d063d709 | 5276 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 5277 | */ |
67e40797 | 5278 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
5279 | { |
5280 | int ret; | |
5281 | ||
67e40797 DG |
5282 | DBG3("Creating LTTng run directory: %s", rundir); |
5283 | ||
d1613cf5 | 5284 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 5285 | if (ret < 0) { |
b1f11e69 | 5286 | if (errno != EEXIST) { |
67e40797 | 5287 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
5288 | goto error; |
5289 | } else { | |
5290 | ret = 0; | |
5291 | } | |
d6f42150 DG |
5292 | } |
5293 | ||
5294 | error: | |
5295 | return ret; | |
5296 | } | |
5297 | ||
5298 | /* | |
d063d709 DG |
5299 | * Setup sockets and directory needed by the kconsumerd communication with the |
5300 | * session daemon. | |
d6f42150 | 5301 | */ |
67e40797 DG |
5302 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
5303 | const char *rundir) | |
d6f42150 DG |
5304 | { |
5305 | int ret; | |
67e40797 | 5306 | char path[PATH_MAX]; |
d6f42150 | 5307 | |
6c71277b | 5308 | switch (consumer_data->type) { |
7753dea8 | 5309 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 5310 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
5311 | break; |
5312 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 5313 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
5314 | break; |
5315 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 5316 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
5317 | break; |
5318 | default: | |
5319 | ERR("Consumer type unknown"); | |
5320 | ret = -EINVAL; | |
5321 | goto error; | |
d6f42150 DG |
5322 | } |
5323 | ||
67e40797 DG |
5324 | DBG2("Creating consumer directory: %s", path); |
5325 | ||
6c71277b | 5326 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
d6f42150 | 5327 | if (ret < 0) { |
6beb2242 | 5328 | if (errno != EEXIST) { |
f11e84c2 | 5329 | PERROR("mkdir"); |
3bd1e081 | 5330 | ERR("Failed to create %s", path); |
6beb2242 DG |
5331 | goto error; |
5332 | } | |
f11e84c2 | 5333 | ret = -1; |
d6f42150 | 5334 | } |
6c71277b MD |
5335 | if (is_root) { |
5336 | ret = chown(path, 0, utils_get_group_id(tracing_group_name)); | |
5337 | if (ret < 0) { | |
5338 | ERR("Unable to set group on %s", path); | |
5339 | PERROR("chown"); | |
5340 | goto error; | |
5341 | } | |
5342 | } | |
d6f42150 DG |
5343 | |
5344 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
5345 | consumer_data->err_sock = |
5346 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
5347 | if (consumer_data->err_sock < 0) { | |
5348 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
5349 | ret = -1; |
5350 | goto error; | |
5351 | } | |
5352 | ||
a24f05ab MD |
5353 | /* |
5354 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
5355 | * show must go on. | |
5356 | */ | |
5357 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
5358 | if (ret < 0) { | |
5359 | PERROR("utils_set_fd_cloexec"); | |
5360 | /* continue anyway */ | |
5361 | } | |
5362 | ||
d6f42150 | 5363 | /* File permission MUST be 660 */ |
3bd1e081 | 5364 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 5365 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 5366 | if (ret < 0) { |
3bd1e081 | 5367 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 5368 | PERROR("chmod"); |
d6f42150 DG |
5369 | goto error; |
5370 | } | |
5371 | ||
5372 | error: | |
5373 | return ret; | |
5374 | } | |
5375 | ||
fac6795d | 5376 | /* |
d063d709 | 5377 | * Signal handler for the daemon |
cf3af59e | 5378 | * |
54d01ffb DG |
5379 | * Simply stop all worker threads, leaving main() return gracefully after |
5380 | * joining all threads and calling cleanup(). | |
fac6795d DG |
5381 | */ |
5382 | static void sighandler(int sig) | |
5383 | { | |
5384 | switch (sig) { | |
cf3af59e | 5385 | case SIGINT: |
af87c45a | 5386 | DBG("SIGINT caught"); |
cf3af59e MD |
5387 | stop_threads(); |
5388 | break; | |
5389 | case SIGTERM: | |
af87c45a | 5390 | DBG("SIGTERM caught"); |
cf3af59e MD |
5391 | stop_threads(); |
5392 | break; | |
0bb7724a DG |
5393 | case SIGUSR1: |
5394 | CMM_STORE_SHARED(recv_child_signal, 1); | |
5395 | break; | |
cf3af59e MD |
5396 | default: |
5397 | break; | |
fac6795d | 5398 | } |
fac6795d DG |
5399 | } |
5400 | ||
5401 | /* | |
d063d709 | 5402 | * Setup signal handler for : |
1d4b027a | 5403 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 5404 | */ |
1d4b027a | 5405 | static int set_signal_handler(void) |
fac6795d | 5406 | { |
1d4b027a DG |
5407 | int ret = 0; |
5408 | struct sigaction sa; | |
5409 | sigset_t sigset; | |
fac6795d | 5410 | |
1d4b027a | 5411 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 5412 | PERROR("sigemptyset"); |
1d4b027a DG |
5413 | return ret; |
5414 | } | |
d6f42150 | 5415 | |
1d4b027a DG |
5416 | sa.sa_mask = sigset; |
5417 | sa.sa_flags = 0; | |
0072e5e2 MD |
5418 | |
5419 | sa.sa_handler = sighandler; | |
1d4b027a | 5420 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 5421 | PERROR("sigaction"); |
1d4b027a | 5422 | return ret; |
d6f42150 DG |
5423 | } |
5424 | ||
1d4b027a | 5425 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 5426 | PERROR("sigaction"); |
1d4b027a | 5427 | return ret; |
d6f42150 | 5428 | } |
aaf26714 | 5429 | |
0072e5e2 | 5430 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 5431 | PERROR("sigaction"); |
1d4b027a | 5432 | return ret; |
8c0faa1d DG |
5433 | } |
5434 | ||
0072e5e2 MD |
5435 | sa.sa_handler = SIG_IGN; |
5436 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
5437 | PERROR("sigaction"); |
5438 | return ret; | |
5439 | } | |
5440 | ||
5441 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
5442 | |
5443 | return ret; | |
fac6795d DG |
5444 | } |
5445 | ||
f3ed775e | 5446 | /* |
d063d709 | 5447 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 5448 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e DG |
5449 | */ |
5450 | static void set_ulimit(void) | |
5451 | { | |
5452 | int ret; | |
5453 | struct rlimit lim; | |
5454 | ||
514bb9f0 | 5455 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
5456 | lim.rlim_cur = 65535; |
5457 | lim.rlim_max = 65535; | |
5458 | ||
5459 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
5460 | if (ret < 0) { | |
76d7553f | 5461 | PERROR("failed to set open files limit"); |
f3ed775e DG |
5462 | } |
5463 | } | |
5464 | ||
35f90c40 DG |
5465 | /* |
5466 | * Write pidfile using the rundir and opt_pidfile. | |
5467 | */ | |
4a15001e | 5468 | static int write_pidfile(void) |
35f90c40 DG |
5469 | { |
5470 | int ret; | |
5471 | char pidfile_path[PATH_MAX]; | |
5472 | ||
5473 | assert(rundir); | |
5474 | ||
5475 | if (opt_pidfile) { | |
b8d76705 MD |
5476 | if (lttng_strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path))) { |
5477 | ret = -1; | |
5478 | goto error; | |
5479 | } | |
35f90c40 DG |
5480 | } else { |
5481 | /* Build pidfile path from rundir and opt_pidfile. */ | |
5482 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
5483 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
5484 | if (ret < 0) { | |
5485 | PERROR("snprintf pidfile path"); | |
5486 | goto error; | |
5487 | } | |
5488 | } | |
5489 | ||
5490 | /* | |
4a15001e | 5491 | * Create pid file in rundir. |
35f90c40 | 5492 | */ |
4a15001e | 5493 | ret = utils_create_pid_file(getpid(), pidfile_path); |
35f90c40 | 5494 | error: |
4a15001e | 5495 | return ret; |
35f90c40 DG |
5496 | } |
5497 | ||
c9cb3e7d JG |
5498 | /* |
5499 | * Create lockfile using the rundir and return its fd. | |
5500 | */ | |
5501 | static int create_lockfile(void) | |
5502 | { | |
5503 | int ret; | |
5504 | char lockfile_path[PATH_MAX]; | |
5505 | ||
5506 | ret = generate_lock_file_path(lockfile_path, sizeof(lockfile_path)); | |
5507 | if (ret < 0) { | |
5508 | goto error; | |
5509 | } | |
5510 | ||
5511 | ret = utils_create_lock_file(lockfile_path); | |
5512 | error: | |
5513 | return ret; | |
5514 | } | |
5515 | ||
cd9290dd | 5516 | /* |
022d91ba | 5517 | * Write agent TCP port using the rundir. |
cd9290dd | 5518 | */ |
4a15001e | 5519 | static int write_agent_port(void) |
cd9290dd DG |
5520 | { |
5521 | int ret; | |
5522 | char path[PATH_MAX]; | |
5523 | ||
5524 | assert(rundir); | |
5525 | ||
5526 | ret = snprintf(path, sizeof(path), "%s/" | |
022d91ba | 5527 | DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE, rundir); |
cd9290dd | 5528 | if (ret < 0) { |
022d91ba | 5529 | PERROR("snprintf agent port path"); |
cd9290dd DG |
5530 | goto error; |
5531 | } | |
5532 | ||
5533 | /* | |
4a15001e | 5534 | * Create TCP agent port file in rundir. |
cd9290dd | 5535 | */ |
4a15001e | 5536 | ret = utils_create_pid_file(agent_tcp_port, path); |
cd9290dd DG |
5537 | |
5538 | error: | |
4a15001e | 5539 | return ret; |
ef367a93 JG |
5540 | } |
5541 | ||
fac6795d DG |
5542 | /* |
5543 | * main | |
5544 | */ | |
5545 | int main(int argc, char **argv) | |
5546 | { | |
4a15001e | 5547 | int ret = 0, retval = 0; |
fac6795d | 5548 | void *status; |
ae9e45b3 | 5549 | const char *home_path, *env_app_timeout; |
fac6795d | 5550 | |
335a95b7 MD |
5551 | init_kernel_workarounds(); |
5552 | ||
f6a9efaa DG |
5553 | rcu_register_thread(); |
5554 | ||
4a15001e MD |
5555 | if (set_signal_handler()) { |
5556 | retval = -1; | |
5557 | goto exit_set_signal_handler; | |
0bb7724a DG |
5558 | } |
5559 | ||
7753dea8 | 5560 | setup_consumerd_path(); |
fb09408a | 5561 | |
12744796 DG |
5562 | page_size = sysconf(_SC_PAGESIZE); |
5563 | if (page_size < 0) { | |
5564 | PERROR("sysconf _SC_PAGESIZE"); | |
5565 | page_size = LONG_MAX; | |
5566 | WARN("Fallback page size to %ld", page_size); | |
5567 | } | |
5568 | ||
4a15001e MD |
5569 | /* |
5570 | * Parse arguments and load the daemon configuration file. | |
5571 | * | |
5572 | * We have an exit_options exit path to free memory reserved by | |
5573 | * set_options. This is needed because the rest of sessiond_cleanup() | |
5574 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
5575 | * depends on set_options. | |
5576 | */ | |
fac6795d | 5577 | progname = argv[0]; |
4a15001e MD |
5578 | if (set_options(argc, argv)) { |
5579 | retval = -1; | |
5580 | goto exit_options; | |
fac6795d DG |
5581 | } |
5582 | ||
5583 | /* Daemonize */ | |
72dd7491 | 5584 | if (opt_daemon || opt_background) { |
ceed52b5 MD |
5585 | int i; |
5586 | ||
72dd7491 MD |
5587 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
5588 | !opt_background); | |
53094c05 | 5589 | if (ret < 0) { |
4a15001e MD |
5590 | retval = -1; |
5591 | goto exit_options; | |
53094c05 | 5592 | } |
0bb7724a | 5593 | |
ceed52b5 | 5594 | /* |
0bb7724a | 5595 | * We are in the child. Make sure all other file descriptors are |
4a15001e MD |
5596 | * closed, in case we are called with more opened file |
5597 | * descriptors than the standard ones. | |
ceed52b5 MD |
5598 | */ |
5599 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
5600 | (void) close(i); | |
5601 | } | |
5602 | } | |
5603 | ||
7567352f MD |
5604 | if (run_as_create_worker(argv[0]) < 0) { |
5605 | goto exit_create_run_as_worker_cleanup; | |
5606 | } | |
5607 | ||
4a15001e MD |
5608 | /* |
5609 | * Starting from here, we can create threads. This needs to be after | |
5610 | * lttng_daemonize due to RCU. | |
5611 | */ | |
5612 | ||
5613 | /* | |
5614 | * Initialize the health check subsystem. This call should set the | |
5615 | * appropriate time values. | |
5616 | */ | |
5617 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
5618 | if (!health_sessiond) { | |
5619 | PERROR("health_app_create error"); | |
5620 | retval = -1; | |
5621 | goto exit_health_sessiond_cleanup; | |
5622 | } | |
5623 | ||
4a15001e | 5624 | /* Create thread to clean up RCU hash tables */ |
5e97de00 | 5625 | if (init_ht_cleanup_thread(&ht_cleanup_thread)) { |
4a15001e MD |
5626 | retval = -1; |
5627 | goto exit_ht_cleanup; | |
5628 | } | |
5629 | ||
ceed52b5 | 5630 | /* Create thread quit pipe */ |
4a15001e MD |
5631 | if (init_thread_quit_pipe()) { |
5632 | retval = -1; | |
5633 | goto exit_init_data; | |
fac6795d DG |
5634 | } |
5635 | ||
5636 | /* Check if daemon is UID = 0 */ | |
5637 | is_root = !getuid(); | |
5638 | ||
fac6795d | 5639 | if (is_root) { |
990570ed | 5640 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
4ea184d1 | 5641 | if (!rundir) { |
4a15001e MD |
5642 | retval = -1; |
5643 | goto exit_init_data; | |
4ea184d1 | 5644 | } |
67e40797 DG |
5645 | |
5646 | /* Create global run dir with root access */ | |
4a15001e MD |
5647 | if (create_lttng_rundir(rundir)) { |
5648 | retval = -1; | |
5649 | goto exit_init_data; | |
d6f42150 DG |
5650 | } |
5651 | ||
fac6795d | 5652 | if (strlen(apps_unix_sock_path) == 0) { |
4a15001e | 5653 | ret = snprintf(apps_unix_sock_path, PATH_MAX, |
d6f42150 | 5654 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); |
4a15001e MD |
5655 | if (ret < 0) { |
5656 | retval = -1; | |
5657 | goto exit_init_data; | |
5658 | } | |
fac6795d DG |
5659 | } |
5660 | ||
5661 | if (strlen(client_unix_sock_path) == 0) { | |
4a15001e | 5662 | ret = snprintf(client_unix_sock_path, PATH_MAX, |
d6f42150 | 5663 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); |
4a15001e MD |
5664 | if (ret < 0) { |
5665 | retval = -1; | |
5666 | goto exit_init_data; | |
5667 | } | |
d6f42150 | 5668 | } |
0fdd1e2c DG |
5669 | |
5670 | /* Set global SHM for ust */ | |
5671 | if (strlen(wait_shm_path) == 0) { | |
4a15001e | 5672 | ret = snprintf(wait_shm_path, PATH_MAX, |
0fdd1e2c | 5673 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); |
4a15001e MD |
5674 | if (ret < 0) { |
5675 | retval = -1; | |
5676 | goto exit_init_data; | |
5677 | } | |
0fdd1e2c | 5678 | } |
67e40797 | 5679 | |
44a5e5eb | 5680 | if (strlen(health_unix_sock_path) == 0) { |
4a15001e MD |
5681 | ret = snprintf(health_unix_sock_path, |
5682 | sizeof(health_unix_sock_path), | |
44a5e5eb | 5683 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); |
4a15001e MD |
5684 | if (ret < 0) { |
5685 | retval = -1; | |
5686 | goto exit_init_data; | |
5687 | } | |
44a5e5eb DG |
5688 | } |
5689 | ||
67e40797 | 5690 | /* Setup kernel consumerd path */ |
4a15001e | 5691 | ret = snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5692 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5693 | if (ret < 0) { |
5694 | retval = -1; | |
5695 | goto exit_init_data; | |
5696 | } | |
5697 | ret = snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5698 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5699 | if (ret < 0) { |
5700 | retval = -1; | |
5701 | goto exit_init_data; | |
5702 | } | |
67e40797 DG |
5703 | |
5704 | DBG2("Kernel consumer err path: %s", | |
5705 | kconsumer_data.err_unix_sock_path); | |
5706 | DBG2("Kernel consumer cmd path: %s", | |
5707 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 5708 | } else { |
feb0f3e5 | 5709 | home_path = utils_get_home_dir(); |
b082db07 | 5710 | if (home_path == NULL) { |
273ea72c DG |
5711 | /* TODO: Add --socket PATH option */ |
5712 | ERR("Can't get HOME directory for sockets creation."); | |
4a15001e MD |
5713 | retval = -1; |
5714 | goto exit_init_data; | |
b082db07 DG |
5715 | } |
5716 | ||
67e40797 DG |
5717 | /* |
5718 | * Create rundir from home path. This will create something like | |
5719 | * $HOME/.lttng | |
5720 | */ | |
990570ed | 5721 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 | 5722 | if (ret < 0) { |
4a15001e MD |
5723 | retval = -1; |
5724 | goto exit_init_data; | |
67e40797 DG |
5725 | } |
5726 | ||
4a15001e MD |
5727 | if (create_lttng_rundir(rundir)) { |
5728 | retval = -1; | |
5729 | goto exit_init_data; | |
67e40797 DG |
5730 | } |
5731 | ||
fac6795d | 5732 | if (strlen(apps_unix_sock_path) == 0) { |
4a15001e MD |
5733 | ret = snprintf(apps_unix_sock_path, PATH_MAX, |
5734 | DEFAULT_HOME_APPS_UNIX_SOCK, | |
5735 | home_path); | |
5736 | if (ret < 0) { | |
5737 | retval = -1; | |
5738 | goto exit_init_data; | |
5739 | } | |
fac6795d DG |
5740 | } |
5741 | ||
5742 | /* Set the cli tool unix socket path */ | |
5743 | if (strlen(client_unix_sock_path) == 0) { | |
4a15001e MD |
5744 | ret = snprintf(client_unix_sock_path, PATH_MAX, |
5745 | DEFAULT_HOME_CLIENT_UNIX_SOCK, | |
5746 | home_path); | |
5747 | if (ret < 0) { | |
5748 | retval = -1; | |
5749 | goto exit_init_data; | |
5750 | } | |
fac6795d | 5751 | } |
0fdd1e2c DG |
5752 | |
5753 | /* Set global SHM for ust */ | |
5754 | if (strlen(wait_shm_path) == 0) { | |
4a15001e MD |
5755 | ret = snprintf(wait_shm_path, PATH_MAX, |
5756 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, | |
5757 | getuid()); | |
5758 | if (ret < 0) { | |
5759 | retval = -1; | |
5760 | goto exit_init_data; | |
5761 | } | |
0fdd1e2c | 5762 | } |
44a5e5eb DG |
5763 | |
5764 | /* Set health check Unix path */ | |
5765 | if (strlen(health_unix_sock_path) == 0) { | |
4a15001e MD |
5766 | ret = snprintf(health_unix_sock_path, |
5767 | sizeof(health_unix_sock_path), | |
5768 | DEFAULT_HOME_HEALTH_UNIX_SOCK, | |
5769 | home_path); | |
5770 | if (ret < 0) { | |
5771 | retval = -1; | |
5772 | goto exit_init_data; | |
5773 | } | |
44a5e5eb | 5774 | } |
fac6795d DG |
5775 | } |
5776 | ||
c9cb3e7d JG |
5777 | lockfile_fd = create_lockfile(); |
5778 | if (lockfile_fd < 0) { | |
4a15001e MD |
5779 | retval = -1; |
5780 | goto exit_init_data; | |
c9cb3e7d JG |
5781 | } |
5782 | ||
5c827ce0 DG |
5783 | /* Set consumer initial state */ |
5784 | kernel_consumerd_state = CONSUMER_STOPPED; | |
5785 | ust_consumerd_state = CONSUMER_STOPPED; | |
5786 | ||
847177cd DG |
5787 | DBG("Client socket path %s", client_unix_sock_path); |
5788 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 5789 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
5790 | DBG("LTTng run directory path: %s", rundir); |
5791 | ||
5792 | /* 32 bits consumerd path setup */ | |
4a15001e | 5793 | ret = snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5794 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5795 | if (ret < 0) { |
5796 | PERROR("snprintf 32-bit consumer error socket path"); | |
5797 | retval = -1; | |
5798 | goto exit_init_data; | |
5799 | } | |
5800 | ret = snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5801 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5802 | if (ret < 0) { |
5803 | PERROR("snprintf 32-bit consumer command socket path"); | |
5804 | retval = -1; | |
5805 | goto exit_init_data; | |
5806 | } | |
67e40797 DG |
5807 | |
5808 | DBG2("UST consumer 32 bits err path: %s", | |
5809 | ustconsumer32_data.err_unix_sock_path); | |
5810 | DBG2("UST consumer 32 bits cmd path: %s", | |
5811 | ustconsumer32_data.cmd_unix_sock_path); | |
5812 | ||
5813 | /* 64 bits consumerd path setup */ | |
4a15001e | 5814 | ret = snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5815 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5816 | if (ret < 0) { |
5817 | PERROR("snprintf 64-bit consumer error socket path"); | |
5818 | retval = -1; | |
5819 | goto exit_init_data; | |
5820 | } | |
5821 | ret = snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5822 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5823 | if (ret < 0) { |
5824 | PERROR("snprintf 64-bit consumer command socket path"); | |
5825 | retval = -1; | |
5826 | goto exit_init_data; | |
5827 | } | |
67e40797 DG |
5828 | |
5829 | DBG2("UST consumer 64 bits err path: %s", | |
5830 | ustconsumer64_data.err_unix_sock_path); | |
5831 | DBG2("UST consumer 64 bits cmd path: %s", | |
5832 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 5833 | |
273ea72c | 5834 | /* |
7d8234d9 | 5835 | * See if daemon already exist. |
fac6795d | 5836 | */ |
4a15001e | 5837 | if (check_existing_daemon()) { |
75462a81 | 5838 | ERR("Already running daemon.\n"); |
273ea72c | 5839 | /* |
cf3af59e MD |
5840 | * We do not goto exit because we must not cleanup() |
5841 | * because a daemon is already running. | |
ab118b20 | 5842 | */ |
4a15001e MD |
5843 | retval = -1; |
5844 | goto exit_init_data; | |
a88df331 DG |
5845 | } |
5846 | ||
1427f9b2 DG |
5847 | /* |
5848 | * Init UST app hash table. Alloc hash table before this point since | |
5849 | * cleanup() can get called after that point. | |
5850 | */ | |
4a15001e | 5851 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 5852 | ERR("Failed to allocate UST app hash table"); |
4a15001e MD |
5853 | retval = -1; |
5854 | goto exit_init_data; | |
5855 | } | |
1427f9b2 | 5856 | |
6a4e4039 JG |
5857 | /* |
5858 | * Initialize agent app hash table. We allocate the hash table here | |
5859 | * since cleanup() can get called after this point. | |
5860 | */ | |
5861 | if (agent_app_ht_alloc()) { | |
5862 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e MD |
5863 | retval = -1; |
5864 | goto exit_init_data; | |
f20baf8e DG |
5865 | } |
5866 | ||
a88df331 DG |
5867 | /* |
5868 | * These actions must be executed as root. We do that *after* setting up | |
5869 | * the sockets path because we MUST make the check for another daemon using | |
5870 | * those paths *before* trying to set the kernel consumer sockets and init | |
5871 | * kernel tracer. | |
5872 | */ | |
5873 | if (is_root) { | |
4a15001e MD |
5874 | if (set_consumer_sockets(&kconsumer_data, rundir)) { |
5875 | retval = -1; | |
5876 | goto exit_init_data; | |
7753dea8 MD |
5877 | } |
5878 | ||
a88df331 | 5879 | /* Setup kernel tracer */ |
4fba7219 DG |
5880 | if (!opt_no_kernel) { |
5881 | init_kernel_tracer(); | |
89588270 DG |
5882 | if (kernel_tracer_fd >= 0) { |
5883 | ret = syscall_init_table(); | |
5884 | if (ret < 0) { | |
4a15001e MD |
5885 | ERR("Unable to populate syscall table. " |
5886 | "Syscall tracing won't work " | |
5887 | "for this session daemon."); | |
89588270 | 5888 | } |
834978fd | 5889 | } |
4fba7219 | 5890 | } |
a88df331 DG |
5891 | |
5892 | /* Set ulimit for open files */ | |
5893 | set_ulimit(); | |
fac6795d | 5894 | } |
4063050c MD |
5895 | /* init lttng_fd tracking must be done after set_ulimit. */ |
5896 | lttng_fd_init(); | |
fac6795d | 5897 | |
4a15001e MD |
5898 | if (set_consumer_sockets(&ustconsumer64_data, rundir)) { |
5899 | retval = -1; | |
5900 | goto exit_init_data; | |
67e40797 DG |
5901 | } |
5902 | ||
4a15001e MD |
5903 | if (set_consumer_sockets(&ustconsumer32_data, rundir)) { |
5904 | retval = -1; | |
5905 | goto exit_init_data; | |
67e40797 DG |
5906 | } |
5907 | ||
d6f42150 | 5908 | /* Setup the needed unix socket */ |
4a15001e MD |
5909 | if (init_daemon_socket()) { |
5910 | retval = -1; | |
5911 | goto exit_init_data; | |
fac6795d DG |
5912 | } |
5913 | ||
5914 | /* Set credentials to socket */ | |
4a15001e MD |
5915 | if (is_root && set_permissions(rundir)) { |
5916 | retval = -1; | |
5917 | goto exit_init_data; | |
fac6795d DG |
5918 | } |
5919 | ||
5b8719f5 DG |
5920 | /* Get parent pid if -S, --sig-parent is specified. */ |
5921 | if (opt_sig_parent) { | |
5922 | ppid = getppid(); | |
5923 | } | |
5924 | ||
7a485870 | 5925 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 | 5926 | if (is_root && !opt_no_kernel) { |
4a15001e MD |
5927 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
5928 | retval = -1; | |
5929 | goto exit_init_data; | |
6620da75 | 5930 | } |
7a485870 DG |
5931 | } |
5932 | ||
099e26bd | 5933 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
5934 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
5935 | retval = -1; | |
5936 | goto exit_init_data; | |
099e26bd DG |
5937 | } |
5938 | ||
d0b96690 | 5939 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
5940 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
5941 | retval = -1; | |
5942 | goto exit_init_data; | |
d0b96690 DG |
5943 | } |
5944 | ||
7972aab2 DG |
5945 | /* Initialize global buffer per UID and PID registry. */ |
5946 | buffer_reg_init_uid_registry(); | |
5947 | buffer_reg_init_pid_registry(); | |
5948 | ||
099e26bd | 5949 | /* Init UST command queue. */ |
8bdee6e2 | 5950 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 5951 | |
273ea72c | 5952 | /* |
4a15001e MD |
5953 | * Get session list pointer. This pointer MUST NOT be free'd. This list |
5954 | * is statically declared in session.c | |
273ea72c | 5955 | */ |
54d01ffb | 5956 | session_list_ptr = session_get_list(); |
b5541356 | 5957 | |
2f77fc4b | 5958 | cmd_init(); |
00e2e675 | 5959 | |
ae9e45b3 DG |
5960 | /* Check for the application socket timeout env variable. */ |
5961 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
5962 | if (env_app_timeout) { | |
5963 | app_socket_timeout = atoi(env_app_timeout); | |
5964 | } else { | |
5965 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
5966 | } | |
5967 | ||
4a15001e MD |
5968 | ret = write_pidfile(); |
5969 | if (ret) { | |
5970 | ERR("Error in write_pidfile"); | |
5971 | retval = -1; | |
5972 | goto exit_init_data; | |
5973 | } | |
5974 | ret = write_agent_port(); | |
5975 | if (ret) { | |
5976 | ERR("Error in write_agent_port"); | |
5977 | retval = -1; | |
5978 | goto exit_init_data; | |
5979 | } | |
35f90c40 | 5980 | |
554831e7 MD |
5981 | /* Initialize communication library */ |
5982 | lttcomm_init(); | |
4a15001e | 5983 | /* Initialize TCP timeout values */ |
d831c249 | 5984 | lttcomm_inet_init(); |
554831e7 | 5985 | |
ef367a93 | 5986 | if (load_session_init_data(&load_info) < 0) { |
4a15001e MD |
5987 | retval = -1; |
5988 | goto exit_init_data; | |
ef367a93 JG |
5989 | } |
5990 | load_info->path = opt_load_session_path; | |
5991 | ||
d5b9fd2f | 5992 | /* Create health-check thread */ |
1a1a34b4 | 5993 | ret = pthread_create(&health_thread, default_pthread_attr(), |
44a5e5eb | 5994 | thread_manage_health, (void *) NULL); |
4a15001e MD |
5995 | if (ret) { |
5996 | errno = ret; | |
44a5e5eb | 5997 | PERROR("pthread_create health"); |
4a15001e | 5998 | retval = -1; |
44a5e5eb DG |
5999 | goto exit_health; |
6000 | } | |
6001 | ||
de27ada2 JG |
6002 | notification_thread_data = notification_init_data(); |
6003 | if (!notification_thread_data) { | |
6004 | retval = -1; | |
6005 | ERR("Failed to initialize notification thread shared data"); | |
6006 | goto exit_notification; | |
6007 | } | |
6008 | ||
6009 | /* Create notification thread. */ | |
6010 | ret = pthread_create(¬ification_thread, default_pthread_attr(), | |
6011 | thread_notification, notification_thread_data); | |
6012 | if (ret) { | |
6013 | errno = ret; | |
6014 | PERROR("pthread_create notification"); | |
6015 | retval = -1; | |
6016 | goto exit_notification; | |
6017 | } | |
6018 | ||
cf3af59e | 6019 | /* Create thread to manage the client socket */ |
1a1a34b4 | 6020 | ret = pthread_create(&client_thread, default_pthread_attr(), |
099e26bd | 6021 | thread_manage_clients, (void *) NULL); |
4a15001e MD |
6022 | if (ret) { |
6023 | errno = ret; | |
76d7553f | 6024 | PERROR("pthread_create clients"); |
4a15001e | 6025 | retval = -1; |
cf3af59e MD |
6026 | goto exit_client; |
6027 | } | |
fac6795d | 6028 | |
099e26bd | 6029 | /* Create thread to dispatch registration */ |
1a1a34b4 | 6030 | ret = pthread_create(&dispatch_thread, default_pthread_attr(), |
099e26bd | 6031 | thread_dispatch_ust_registration, (void *) NULL); |
4a15001e MD |
6032 | if (ret) { |
6033 | errno = ret; | |
76d7553f | 6034 | PERROR("pthread_create dispatch"); |
4a15001e | 6035 | retval = -1; |
099e26bd DG |
6036 | goto exit_dispatch; |
6037 | } | |
6038 | ||
6039 | /* Create thread to manage application registration. */ | |
1a1a34b4 | 6040 | ret = pthread_create(®_apps_thread, default_pthread_attr(), |
099e26bd | 6041 | thread_registration_apps, (void *) NULL); |
4a15001e MD |
6042 | if (ret) { |
6043 | errno = ret; | |
76d7553f | 6044 | PERROR("pthread_create registration"); |
4a15001e | 6045 | retval = -1; |
099e26bd DG |
6046 | goto exit_reg_apps; |
6047 | } | |
6048 | ||
cf3af59e | 6049 | /* Create thread to manage application socket */ |
1a1a34b4 | 6050 | ret = pthread_create(&apps_thread, default_pthread_attr(), |
54d01ffb | 6051 | thread_manage_apps, (void *) NULL); |
4a15001e MD |
6052 | if (ret) { |
6053 | errno = ret; | |
d0b96690 | 6054 | PERROR("pthread_create apps"); |
4a15001e | 6055 | retval = -1; |
d0b96690 DG |
6056 | goto exit_apps; |
6057 | } | |
6058 | ||
6059 | /* Create thread to manage application notify socket */ | |
1a1a34b4 | 6060 | ret = pthread_create(&apps_notify_thread, default_pthread_attr(), |
d0b96690 | 6061 | ust_thread_manage_notify, (void *) NULL); |
4a15001e MD |
6062 | if (ret) { |
6063 | errno = ret; | |
f5c32ef1 | 6064 | PERROR("pthread_create notify"); |
4a15001e | 6065 | retval = -1; |
9563b0ad | 6066 | goto exit_apps_notify; |
cf3af59e | 6067 | } |
fac6795d | 6068 | |
022d91ba | 6069 | /* Create agent registration thread. */ |
1a1a34b4 | 6070 | ret = pthread_create(&agent_reg_thread, default_pthread_attr(), |
022d91ba | 6071 | agent_thread_manage_registration, (void *) NULL); |
4a15001e MD |
6072 | if (ret) { |
6073 | errno = ret; | |
022d91ba | 6074 | PERROR("pthread_create agent"); |
4a15001e | 6075 | retval = -1; |
022d91ba | 6076 | goto exit_agent_reg; |
4d076222 DG |
6077 | } |
6078 | ||
6620da75 DG |
6079 | /* Don't start this thread if kernel tracing is not requested nor root */ |
6080 | if (is_root && !opt_no_kernel) { | |
6081 | /* Create kernel thread to manage kernel event */ | |
1a1a34b4 | 6082 | ret = pthread_create(&kernel_thread, default_pthread_attr(), |
6620da75 | 6083 | thread_manage_kernel, (void *) NULL); |
4a15001e MD |
6084 | if (ret) { |
6085 | errno = ret; | |
6620da75 | 6086 | PERROR("pthread_create kernel"); |
4a15001e | 6087 | retval = -1; |
6620da75 DG |
6088 | goto exit_kernel; |
6089 | } | |
ef367a93 | 6090 | } |
7a485870 | 6091 | |
4a15001e | 6092 | /* Create session loading thread. */ |
1a1a34b4 MJ |
6093 | ret = pthread_create(&load_session_thread, default_pthread_attr(), |
6094 | thread_load_session, load_info); | |
4a15001e MD |
6095 | if (ret) { |
6096 | errno = ret; | |
6097 | PERROR("pthread_create load_session_thread"); | |
6098 | retval = -1; | |
6099 | goto exit_load_session; | |
6100 | } | |
6101 | ||
6102 | /* | |
6103 | * This is where we start awaiting program completion (e.g. through | |
6104 | * signal that asks threads to teardown). | |
6105 | */ | |
6106 | ||
6107 | ret = pthread_join(load_session_thread, &status); | |
6108 | if (ret) { | |
6109 | errno = ret; | |
6110 | PERROR("pthread_join load_session_thread"); | |
6111 | retval = -1; | |
6112 | } | |
6113 | exit_load_session: | |
ef367a93 JG |
6114 | |
6115 | if (is_root && !opt_no_kernel) { | |
6620da75 | 6116 | ret = pthread_join(kernel_thread, &status); |
4a15001e MD |
6117 | if (ret) { |
6118 | errno = ret; | |
6620da75 | 6119 | PERROR("pthread_join"); |
4a15001e | 6120 | retval = -1; |
6620da75 | 6121 | } |
fac6795d | 6122 | } |
cf3af59e | 6123 | exit_kernel: |
4a15001e | 6124 | |
022d91ba | 6125 | ret = pthread_join(agent_reg_thread, &status); |
4a15001e MD |
6126 | if (ret) { |
6127 | errno = ret; | |
022d91ba | 6128 | PERROR("pthread_join agent"); |
4a15001e | 6129 | retval = -1; |
4d076222 | 6130 | } |
022d91ba | 6131 | exit_agent_reg: |
4a15001e | 6132 | |
9563b0ad | 6133 | ret = pthread_join(apps_notify_thread, &status); |
4a15001e MD |
6134 | if (ret) { |
6135 | errno = ret; | |
9563b0ad | 6136 | PERROR("pthread_join apps notify"); |
4a15001e | 6137 | retval = -1; |
9563b0ad | 6138 | } |
9563b0ad | 6139 | exit_apps_notify: |
4a15001e | 6140 | |
cf3af59e | 6141 | ret = pthread_join(apps_thread, &status); |
4a15001e MD |
6142 | if (ret) { |
6143 | errno = ret; | |
9563b0ad | 6144 | PERROR("pthread_join apps"); |
4a15001e | 6145 | retval = -1; |
cf3af59e | 6146 | } |
cf3af59e | 6147 | exit_apps: |
4a15001e | 6148 | |
099e26bd | 6149 | ret = pthread_join(reg_apps_thread, &status); |
4a15001e MD |
6150 | if (ret) { |
6151 | errno = ret; | |
76d7553f | 6152 | PERROR("pthread_join"); |
4a15001e | 6153 | retval = -1; |
099e26bd | 6154 | } |
099e26bd | 6155 | exit_reg_apps: |
4a15001e | 6156 | |
772b8f4d MD |
6157 | /* |
6158 | * Join dispatch thread after joining reg_apps_thread to ensure | |
6159 | * we don't leak applications in the queue. | |
6160 | */ | |
099e26bd | 6161 | ret = pthread_join(dispatch_thread, &status); |
4a15001e MD |
6162 | if (ret) { |
6163 | errno = ret; | |
76d7553f | 6164 | PERROR("pthread_join"); |
4a15001e | 6165 | retval = -1; |
099e26bd | 6166 | } |
099e26bd | 6167 | exit_dispatch: |
4a15001e | 6168 | |
cf3af59e | 6169 | ret = pthread_join(client_thread, &status); |
4a15001e MD |
6170 | if (ret) { |
6171 | errno = ret; | |
76d7553f | 6172 | PERROR("pthread_join"); |
4a15001e | 6173 | retval = -1; |
cf3af59e | 6174 | } |
de27ada2 | 6175 | |
4a15001e | 6176 | exit_client: |
de27ada2 JG |
6177 | ret = pthread_join(notification_thread, &status); |
6178 | if (ret) { | |
6179 | errno = ret; | |
6180 | PERROR("pthread_join notification thread"); | |
6181 | retval = -1; | |
6182 | } | |
a88df331 | 6183 | |
de27ada2 | 6184 | exit_notification: |
4a15001e MD |
6185 | ret = pthread_join(health_thread, &status); |
6186 | if (ret) { | |
6187 | errno = ret; | |
6188 | PERROR("pthread_join health thread"); | |
6189 | retval = -1; | |
06f525de DG |
6190 | } |
6191 | ||
de27ada2 | 6192 | exit_health: |
4a15001e | 6193 | exit_init_data: |
4d62fbf8 MD |
6194 | /* |
6195 | * Wait for all pending call_rcu work to complete before tearing | |
6196 | * down data structures. call_rcu worker may be trying to | |
6197 | * perform lookups in those structures. | |
6198 | */ | |
6199 | rcu_barrier(); | |
4a15001e MD |
6200 | /* |
6201 | * sessiond_cleanup() is called when no other thread is running, except | |
6202 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
6203 | */ | |
6204 | rcu_thread_online(); | |
6205 | sessiond_cleanup(); | |
6206 | rcu_thread_offline(); | |
6207 | rcu_unregister_thread(); | |
06f525de | 6208 | |
c4d5de9d JG |
6209 | /* |
6210 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
6211 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
6212 | * the queue is empty before shutting down the clean-up thread. | |
6213 | */ | |
6214 | rcu_barrier(); | |
6215 | ||
5e97de00 | 6216 | ret = fini_ht_cleanup_thread(&ht_cleanup_thread); |
4a15001e | 6217 | if (ret) { |
4a15001e | 6218 | retval = -1; |
0b2dc8df MD |
6219 | } |
6220 | exit_ht_cleanup: | |
4a15001e | 6221 | |
4a15001e MD |
6222 | health_app_destroy(health_sessiond); |
6223 | exit_health_sessiond_cleanup: | |
7567352f | 6224 | exit_create_run_as_worker_cleanup: |
4a15001e MD |
6225 | |
6226 | exit_options: | |
6227 | sessiond_cleanup_options(); | |
6228 | ||
6229 | exit_set_signal_handler: | |
0658924e | 6230 | |
4a15001e | 6231 | if (!retval) { |
cf3af59e | 6232 | exit(EXIT_SUCCESS); |
4a15001e MD |
6233 | } else { |
6234 | exit(EXIT_FAILURE); | |
67e40797 | 6235 | } |
fac6795d | 6236 | } |