Commit | Line | Data |
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826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
0fdd1e2c | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
26296c48 | 4 | * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 5 | * |
d14d33bf AM |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License, version 2 only, | |
8 | * as published by the Free Software Foundation. | |
91d76f53 | 9 | * |
d14d33bf AM |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
91d76f53 | 14 | * |
d14d33bf AM |
15 | * You should have received a copy of the GNU General Public License along |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
fac6795d DG |
18 | */ |
19 | ||
20 | #define _GNU_SOURCE | |
6c1c0768 | 21 | #define _LGPL_SOURCE |
fac6795d DG |
22 | #include <getopt.h> |
23 | #include <grp.h> | |
24 | #include <limits.h> | |
0bb7724a | 25 | #include <paths.h> |
fac6795d DG |
26 | #include <pthread.h> |
27 | #include <signal.h> | |
28 | #include <stdio.h> | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
331744e3 | 31 | #include <inttypes.h> |
0fdd1e2c | 32 | #include <sys/mman.h> |
b73401da | 33 | #include <sys/mount.h> |
1e307fab | 34 | #include <sys/resource.h> |
fac6795d DG |
35 | #include <sys/socket.h> |
36 | #include <sys/stat.h> | |
37 | #include <sys/types.h> | |
0fdd1e2c | 38 | #include <sys/wait.h> |
5c827ce0 | 39 | #include <urcu/uatomic.h> |
fac6795d | 40 | #include <unistd.h> |
3bd1e081 | 41 | #include <config.h> |
fac6795d | 42 | |
990570ed | 43 | #include <common/common.h> |
d27c42b8 | 44 | #include <common/compat/socket.h> |
e8fa9fb0 | 45 | #include <common/compat/getenv.h> |
db758600 DG |
46 | #include <common/defaults.h> |
47 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 48 | #include <common/futex.h> |
00e2e675 | 49 | #include <common/relayd/relayd.h> |
81b86775 | 50 | #include <common/utils.h> |
3ccdf997 | 51 | #include <common/daemonize.h> |
26296c48 | 52 | #include <common/config/config.h> |
fac6795d | 53 | |
10a8a223 | 54 | #include "lttng-sessiond.h" |
7972aab2 | 55 | #include "buffer-registry.h" |
54d01ffb | 56 | #include "channel.h" |
2f77fc4b | 57 | #include "cmd.h" |
00e2e675 | 58 | #include "consumer.h" |
099e26bd | 59 | #include "context.h" |
54d01ffb | 60 | #include "event.h" |
4771f025 | 61 | #include "kernel.h" |
f1e16794 | 62 | #include "kernel-consumer.h" |
096102bd | 63 | #include "modprobe.h" |
0fdd1e2c | 64 | #include "shm.h" |
1e307fab | 65 | #include "ust-ctl.h" |
00e2e675 | 66 | #include "ust-consumer.h" |
8e68d1c8 | 67 | #include "utils.h" |
4063050c | 68 | #include "fd-limit.h" |
8782cc74 | 69 | #include "health-sessiond.h" |
8ac94142 | 70 | #include "testpoint.h" |
d0b96690 | 71 | #include "ust-thread.h" |
022d91ba | 72 | #include "agent-thread.h" |
fb198a11 | 73 | #include "save.h" |
ef367a93 | 74 | #include "load-session-thread.h" |
834978fd | 75 | #include "syscall.h" |
7c1d2758 | 76 | #include "agent.h" |
fac6795d | 77 | |
ebaeda94 MD |
78 | #define CONSUMERD_FILE "lttng-consumerd" |
79 | ||
fac6795d | 80 | const char *progname; |
6c71277b | 81 | static const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
26296c48 JG |
82 | static int tracing_group_name_override; |
83 | static char *opt_pidfile; | |
5b8719f5 | 84 | static int opt_sig_parent; |
97e19046 | 85 | static int opt_verbose_consumer; |
72dd7491 | 86 | static int opt_daemon, opt_background; |
4fba7219 | 87 | static int opt_no_kernel; |
ef367a93 | 88 | static char *opt_load_session_path; |
1d4b027a | 89 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
0bb7724a | 90 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ |
67e40797 | 91 | static char *rundir; |
c9cb3e7d | 92 | static int lockfile_fd = -1; |
3bd1e081 | 93 | |
0bb7724a DG |
94 | /* Set to 1 when a SIGUSR1 signal is received. */ |
95 | static int recv_child_signal; | |
96 | ||
a23ec3a7 DG |
97 | /* |
98 | * Consumer daemon specific control data. Every value not initialized here is | |
99 | * set to 0 by the static definition. | |
100 | */ | |
3bd1e081 MD |
101 | static struct consumer_data kconsumer_data = { |
102 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
103 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
104 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
03550b58 MD |
105 | .err_sock = -1, |
106 | .cmd_sock = -1, | |
173af62f DG |
107 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
108 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
109 | .cond = PTHREAD_COND_INITIALIZER, |
110 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 111 | }; |
7753dea8 MD |
112 | static struct consumer_data ustconsumer64_data = { |
113 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
114 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
115 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
116 | .err_sock = -1, |
117 | .cmd_sock = -1, | |
173af62f DG |
118 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
119 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
120 | .cond = PTHREAD_COND_INITIALIZER, |
121 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
122 | }; |
123 | static struct consumer_data ustconsumer32_data = { | |
124 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
125 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
126 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
127 | .err_sock = -1, |
128 | .cmd_sock = -1, | |
173af62f DG |
129 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
130 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
131 | .cond = PTHREAD_COND_INITIALIZER, |
132 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
133 | }; |
134 | ||
26296c48 JG |
135 | /* Command line options */ |
136 | static const struct option long_options[] = { | |
0f5ea17c JG |
137 | { "client-sock", required_argument, 0, 'c' }, |
138 | { "apps-sock", required_argument, 0, 'a' }, | |
139 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
140 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
141 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
142 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
143 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
144 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
145 | { "consumerd32-path", required_argument, 0, '\0' }, | |
146 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
147 | { "consumerd64-path", required_argument, 0, '\0' }, | |
148 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
149 | { "daemonize", no_argument, 0, 'd' }, | |
150 | { "background", no_argument, 0, 'b' }, | |
151 | { "sig-parent", no_argument, 0, 'S' }, | |
152 | { "help", no_argument, 0, 'h' }, | |
153 | { "group", required_argument, 0, 'g' }, | |
154 | { "version", no_argument, 0, 'V' }, | |
155 | { "quiet", no_argument, 0, 'q' }, | |
156 | { "verbose", no_argument, 0, 'v' }, | |
157 | { "verbose-consumer", no_argument, 0, '\0' }, | |
158 | { "no-kernel", no_argument, 0, '\0' }, | |
159 | { "pidfile", required_argument, 0, 'p' }, | |
160 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
161 | { "config", required_argument, 0, 'f' }, | |
162 | { "load", required_argument, 0, 'l' }, | |
163 | { "kmod-probes", required_argument, 0, '\0' }, | |
164 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
26296c48 JG |
165 | { NULL, 0, 0, 0 } |
166 | }; | |
167 | ||
168 | /* Command line options to ignore from configuration file */ | |
169 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
170 | ||
26c9d55e | 171 | /* Shared between threads */ |
099e26bd | 172 | static int dispatch_thread_exit; |
fac6795d | 173 | |
54d01ffb DG |
174 | /* Global application Unix socket path */ |
175 | static char apps_unix_sock_path[PATH_MAX]; | |
176 | /* Global client Unix socket path */ | |
177 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
178 | /* global wait shm path for UST */ |
179 | static char wait_shm_path[PATH_MAX]; | |
44a5e5eb DG |
180 | /* Global health check unix path */ |
181 | static char health_unix_sock_path[PATH_MAX]; | |
fac6795d | 182 | |
1d4b027a | 183 | /* Sockets and FDs */ |
a4b35e07 MD |
184 | static int client_sock = -1; |
185 | static int apps_sock = -1; | |
2f77fc4b | 186 | int kernel_tracer_fd = -1; |
76d7553f | 187 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 188 | |
273ea72c DG |
189 | /* |
190 | * Quit pipe for all threads. This permits a single cancellation point | |
191 | * for all threads when receiving an event on the pipe. | |
192 | */ | |
76d7553f | 193 | static int thread_quit_pipe[2] = { -1, -1 }; |
4a15001e | 194 | static int ht_cleanup_quit_pipe[2] = { -1, -1 }; |
273ea72c | 195 | |
099e26bd DG |
196 | /* |
197 | * This pipe is used to inform the thread managing application communication | |
198 | * that a command is queued and ready to be processed. | |
199 | */ | |
76d7553f | 200 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 201 | |
d0b96690 DG |
202 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
203 | ||
1d4b027a | 204 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 205 | static pthread_t apps_thread; |
d0b96690 | 206 | static pthread_t apps_notify_thread; |
099e26bd | 207 | static pthread_t reg_apps_thread; |
1d4b027a | 208 | static pthread_t client_thread; |
7a485870 | 209 | static pthread_t kernel_thread; |
099e26bd | 210 | static pthread_t dispatch_thread; |
44a5e5eb | 211 | static pthread_t health_thread; |
0b2dc8df | 212 | static pthread_t ht_cleanup_thread; |
022d91ba | 213 | static pthread_t agent_reg_thread; |
ef367a93 | 214 | static pthread_t load_session_thread; |
5eb91c98 | 215 | |
099e26bd DG |
216 | /* |
217 | * UST registration command queue. This queue is tied with a futex and uses a N | |
218 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
219 | * | |
b22c5da8 DG |
220 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
221 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
222 | * the line new application socket and monitors it for any I/O error or clean | |
223 | * close that triggers an unregistration of the application. | |
099e26bd DG |
224 | */ |
225 | static struct ust_cmd_queue ust_cmd_queue; | |
226 | ||
b5541356 DG |
227 | /* |
228 | * Pointer initialized before thread creation. | |
229 | * | |
230 | * This points to the tracing session list containing the session count and a | |
231 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
232 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 233 | * |
d063d709 | 234 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 235 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
236 | */ |
237 | static struct ltt_session_list *session_list_ptr; | |
238 | ||
7753dea8 MD |
239 | int ust_consumerd64_fd = -1; |
240 | int ust_consumerd32_fd = -1; | |
241 | ||
fb6f1fa2 YB |
242 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
243 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
244 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
245 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
26296c48 JG |
246 | static int consumerd32_bin_override; |
247 | static int consumerd64_bin_override; | |
248 | static int consumerd32_libdir_override; | |
249 | static int consumerd64_libdir_override; | |
fb09408a | 250 | |
2f77fc4b DG |
251 | static const char *module_proc_lttng = "/proc/lttng"; |
252 | ||
5c827ce0 DG |
253 | /* |
254 | * Consumer daemon state which is changed when spawning it, killing it or in | |
255 | * case of a fatal error. | |
256 | */ | |
257 | enum consumerd_state { | |
258 | CONSUMER_STARTED = 1, | |
259 | CONSUMER_STOPPED = 2, | |
260 | CONSUMER_ERROR = 3, | |
261 | }; | |
262 | ||
263 | /* | |
264 | * This consumer daemon state is used to validate if a client command will be | |
265 | * able to reach the consumer. If not, the client is informed. For instance, | |
266 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
267 | * error to the client. | |
268 | * | |
269 | * The following example shows a possible race condition of this scheme: | |
270 | * | |
271 | * consumer thread error happens | |
272 | * client cmd arrives | |
273 | * client cmd checks state -> still OK | |
274 | * consumer thread exit, sets error | |
275 | * client cmd try to talk to consumer | |
276 | * ... | |
277 | * | |
278 | * However, since the consumer is a different daemon, we have no way of making | |
279 | * sure the command will reach it safely even with this state flag. This is why | |
280 | * we consider that up to the state validation during command processing, the | |
281 | * command is safe. After that, we can not guarantee the correctness of the | |
282 | * client request vis-a-vis the consumer. | |
283 | */ | |
284 | static enum consumerd_state ust_consumerd_state; | |
285 | static enum consumerd_state kernel_consumerd_state; | |
286 | ||
ae9e45b3 DG |
287 | /* |
288 | * Socket timeout for receiving and sending in seconds. | |
289 | */ | |
290 | static int app_socket_timeout; | |
291 | ||
12744796 DG |
292 | /* Set in main() with the current page size. */ |
293 | long page_size; | |
294 | ||
8782cc74 MD |
295 | /* Application health monitoring */ |
296 | struct health_app *health_sessiond; | |
297 | ||
022d91ba DG |
298 | /* Agent TCP port for registration. Used by the agent thread. */ |
299 | unsigned int agent_tcp_port = DEFAULT_AGENT_TCP_PORT; | |
4d076222 | 300 | |
f43f95a9 DG |
301 | /* Am I root or not. */ |
302 | int is_root; /* Set to 1 if the daemon is running as root */ | |
303 | ||
26296c48 JG |
304 | const char * const config_section_name = "sessiond"; |
305 | ||
ef367a93 JG |
306 | /* Load session thread information to operate. */ |
307 | struct load_session_thread_data *load_info; | |
308 | ||
7c1d2758 JG |
309 | /* Global hash tables */ |
310 | struct lttng_ht *agent_apps_ht_by_sock = NULL; | |
311 | ||
97bc1426 MD |
312 | /* |
313 | * Whether sessiond is ready for commands/health check requests. | |
314 | * NR_LTTNG_SESSIOND_READY must match the number of calls to | |
ef367a93 | 315 | * sessiond_notify_ready(). |
97bc1426 | 316 | */ |
ef367a93 | 317 | #define NR_LTTNG_SESSIOND_READY 3 |
97bc1426 MD |
318 | int lttng_sessiond_ready = NR_LTTNG_SESSIOND_READY; |
319 | ||
320 | /* Notify parents that we are ready for cmd and health check */ | |
ef367a93 JG |
321 | LTTNG_HIDDEN |
322 | void sessiond_notify_ready(void) | |
97bc1426 MD |
323 | { |
324 | if (uatomic_sub_return(<tng_sessiond_ready, 1) == 0) { | |
325 | /* | |
326 | * Notify parent pid that we are ready to accept command | |
327 | * for client side. This ppid is the one from the | |
328 | * external process that spawned us. | |
329 | */ | |
330 | if (opt_sig_parent) { | |
331 | kill(ppid, SIGUSR1); | |
332 | } | |
333 | ||
334 | /* | |
335 | * Notify the parent of the fork() process that we are | |
336 | * ready. | |
337 | */ | |
72dd7491 | 338 | if (opt_daemon || opt_background) { |
97bc1426 MD |
339 | kill(child_ppid, SIGUSR1); |
340 | } | |
341 | } | |
342 | } | |
343 | ||
fb09408a | 344 | static |
7753dea8 | 345 | void setup_consumerd_path(void) |
fb09408a | 346 | { |
fc7a59ce | 347 | const char *bin, *libdir; |
fb09408a | 348 | |
7753dea8 MD |
349 | /* |
350 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
351 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
352 | * has not been defined. | |
7753dea8 | 353 | */ |
ebaeda94 | 354 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
355 | if (!consumerd32_bin[0]) { |
356 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
357 | } |
358 | if (!consumerd32_libdir[0]) { | |
359 | consumerd32_libdir = INSTALL_LIB_PATH; | |
360 | } | |
361 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
362 | if (!consumerd64_bin[0]) { |
363 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 364 | } |
ebaeda94 MD |
365 | if (!consumerd64_libdir[0]) { |
366 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
367 | } |
368 | #else | |
369 | #error "Unknown bitness" | |
370 | #endif | |
371 | ||
fb09408a MD |
372 | /* |
373 | * runtime env. var. overrides the build default. | |
374 | */ | |
e8fa9fb0 | 375 | bin = lttng_secure_getenv("LTTNG_CONSUMERD32_BIN"); |
fc7a59ce AM |
376 | if (bin) { |
377 | consumerd32_bin = bin; | |
7753dea8 | 378 | } |
e8fa9fb0 | 379 | bin = lttng_secure_getenv("LTTNG_CONSUMERD64_BIN"); |
fc7a59ce AM |
380 | if (bin) { |
381 | consumerd64_bin = bin; | |
ebaeda94 | 382 | } |
e8fa9fb0 | 383 | libdir = lttng_secure_getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
384 | if (libdir) { |
385 | consumerd32_libdir = libdir; | |
386 | } | |
e8fa9fb0 | 387 | libdir = lttng_secure_getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
388 | if (libdir) { |
389 | consumerd64_libdir = libdir; | |
fb09408a MD |
390 | } |
391 | } | |
392 | ||
4a15001e MD |
393 | static |
394 | int __sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size, | |
395 | int *a_pipe) | |
5eb91c98 DG |
396 | { |
397 | int ret; | |
398 | ||
d0b96690 | 399 | assert(events); |
5eb91c98 DG |
400 | |
401 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
402 | if (ret < 0) { | |
403 | goto error; | |
404 | } | |
405 | ||
406 | /* Add quit pipe */ | |
4a15001e | 407 | ret = lttng_poll_add(events, a_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
408 | if (ret < 0) { |
409 | goto error; | |
410 | } | |
411 | ||
412 | return 0; | |
413 | ||
414 | error: | |
415 | return ret; | |
416 | } | |
417 | ||
4a15001e MD |
418 | /* |
419 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
420 | */ | |
421 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) | |
422 | { | |
423 | return __sessiond_set_thread_pollset(events, size, thread_quit_pipe); | |
424 | } | |
425 | ||
426 | /* | |
427 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
428 | */ | |
429 | int sessiond_set_ht_cleanup_thread_pollset(struct lttng_poll_event *events, | |
430 | size_t size) | |
431 | { | |
432 | return __sessiond_set_thread_pollset(events, size, | |
433 | ht_cleanup_quit_pipe); | |
434 | } | |
435 | ||
436 | static | |
437 | int __sessiond_check_thread_quit_pipe(int fd, uint32_t events, int a_pipe) | |
438 | { | |
439 | if (fd == a_pipe && (events & LPOLLIN)) { | |
440 | return 1; | |
441 | } | |
442 | return 0; | |
443 | } | |
444 | ||
5eb91c98 DG |
445 | /* |
446 | * Check if the thread quit pipe was triggered. | |
447 | * | |
448 | * Return 1 if it was triggered else 0; | |
449 | */ | |
d0b96690 | 450 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
5eb91c98 | 451 | { |
4a15001e MD |
452 | return __sessiond_check_thread_quit_pipe(fd, events, |
453 | thread_quit_pipe[0]); | |
454 | } | |
5eb91c98 | 455 | |
4a15001e MD |
456 | /* |
457 | * Check if the ht_cleanup thread quit pipe was triggered. | |
458 | * | |
459 | * Return 1 if it was triggered else 0; | |
460 | */ | |
461 | int sessiond_check_ht_cleanup_quit(int fd, uint32_t events) | |
462 | { | |
463 | return __sessiond_check_thread_quit_pipe(fd, events, | |
464 | ht_cleanup_quit_pipe[0]); | |
5eb91c98 DG |
465 | } |
466 | ||
273ea72c | 467 | /* |
5eb91c98 | 468 | * Init thread quit pipe. |
273ea72c DG |
469 | * |
470 | * Return -1 on error or 0 if all pipes are created. | |
471 | */ | |
4a15001e | 472 | static int __init_thread_quit_pipe(int *a_pipe) |
273ea72c | 473 | { |
730389d9 | 474 | int ret, i; |
273ea72c | 475 | |
4a15001e | 476 | ret = pipe(a_pipe); |
273ea72c | 477 | if (ret < 0) { |
730389d9 | 478 | PERROR("thread quit pipe"); |
273ea72c DG |
479 | goto error; |
480 | } | |
481 | ||
730389d9 | 482 | for (i = 0; i < 2; i++) { |
4a15001e | 483 | ret = fcntl(a_pipe[i], F_SETFD, FD_CLOEXEC); |
730389d9 DG |
484 | if (ret < 0) { |
485 | PERROR("fcntl"); | |
486 | goto error; | |
487 | } | |
488 | } | |
489 | ||
273ea72c DG |
490 | error: |
491 | return ret; | |
492 | } | |
493 | ||
4a15001e MD |
494 | static int init_thread_quit_pipe(void) |
495 | { | |
496 | return __init_thread_quit_pipe(thread_quit_pipe); | |
497 | } | |
498 | ||
499 | static int init_ht_cleanup_quit_pipe(void) | |
500 | { | |
501 | return __init_thread_quit_pipe(ht_cleanup_quit_pipe); | |
502 | } | |
503 | ||
099e26bd DG |
504 | /* |
505 | * Stop all threads by closing the thread quit pipe. | |
506 | */ | |
cf3af59e MD |
507 | static void stop_threads(void) |
508 | { | |
5eb91c98 DG |
509 | int ret; |
510 | ||
cf3af59e MD |
511 | /* Stopping all threads */ |
512 | DBG("Terminating all threads"); | |
54d01ffb | 513 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
514 | if (ret < 0) { |
515 | ERR("write error on thread quit pipe"); | |
516 | } | |
517 | ||
099e26bd | 518 | /* Dispatch thread */ |
26c9d55e | 519 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 520 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
521 | } |
522 | ||
e975f9f8 DG |
523 | /* |
524 | * Close every consumer sockets. | |
525 | */ | |
526 | static void close_consumer_sockets(void) | |
527 | { | |
528 | int ret; | |
529 | ||
530 | if (kconsumer_data.err_sock >= 0) { | |
531 | ret = close(kconsumer_data.err_sock); | |
532 | if (ret < 0) { | |
533 | PERROR("kernel consumer err_sock close"); | |
534 | } | |
535 | } | |
536 | if (ustconsumer32_data.err_sock >= 0) { | |
537 | ret = close(ustconsumer32_data.err_sock); | |
538 | if (ret < 0) { | |
a76cbd9f | 539 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
540 | } |
541 | } | |
542 | if (ustconsumer64_data.err_sock >= 0) { | |
543 | ret = close(ustconsumer64_data.err_sock); | |
544 | if (ret < 0) { | |
a76cbd9f | 545 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
546 | } |
547 | } | |
548 | if (kconsumer_data.cmd_sock >= 0) { | |
549 | ret = close(kconsumer_data.cmd_sock); | |
550 | if (ret < 0) { | |
551 | PERROR("kernel consumer cmd_sock close"); | |
552 | } | |
553 | } | |
554 | if (ustconsumer32_data.cmd_sock >= 0) { | |
555 | ret = close(ustconsumer32_data.cmd_sock); | |
556 | if (ret < 0) { | |
a76cbd9f | 557 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
558 | } |
559 | } | |
560 | if (ustconsumer64_data.cmd_sock >= 0) { | |
561 | ret = close(ustconsumer64_data.cmd_sock); | |
562 | if (ret < 0) { | |
a76cbd9f | 563 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
564 | } |
565 | } | |
566 | } | |
567 | ||
c9cb3e7d JG |
568 | /* |
569 | * Generate the full lock file path using the rundir. | |
570 | * | |
571 | * Return the snprintf() return value thus a negative value is an error. | |
572 | */ | |
573 | static int generate_lock_file_path(char *path, size_t len) | |
574 | { | |
575 | int ret; | |
576 | ||
577 | assert(path); | |
578 | assert(rundir); | |
579 | ||
580 | /* Build lockfile path from rundir. */ | |
581 | ret = snprintf(path, len, "%s/" DEFAULT_LTTNG_SESSIOND_LOCKFILE, rundir); | |
582 | if (ret < 0) { | |
583 | PERROR("snprintf lockfile path"); | |
584 | } | |
585 | ||
586 | return ret; | |
587 | } | |
588 | ||
4e4714cb JR |
589 | /* |
590 | * Wait on consumer process termination. | |
591 | * | |
592 | * Need to be called with the consumer data lock held or from a context | |
593 | * ensuring no concurrent access to data (e.g: cleanup). | |
594 | */ | |
595 | static void wait_consumer(struct consumer_data *consumer_data) | |
596 | { | |
597 | pid_t ret; | |
598 | int status; | |
599 | ||
600 | if (consumer_data->pid <= 0) { | |
601 | return; | |
602 | } | |
603 | ||
604 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
605 | consumer_data->pid); | |
606 | ret = waitpid(consumer_data->pid, &status, 0); | |
607 | if (ret == -1) { | |
608 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
609 | } | |
610 | if (!WIFEXITED(status)) { | |
611 | ERR("consumerd termination with error: %d", | |
612 | WEXITSTATUS(ret)); | |
613 | } | |
614 | consumer_data->pid = 0; | |
615 | } | |
616 | ||
fac6795d | 617 | /* |
4a15001e | 618 | * Cleanup the session daemon's data structures. |
fac6795d | 619 | */ |
4a15001e | 620 | static void sessiond_cleanup(void) |
fac6795d | 621 | { |
ef599319 | 622 | int ret; |
af9737e9 | 623 | struct ltt_session *sess, *stmp; |
8c6c56c2 | 624 | char path[PATH_MAX]; |
fac6795d | 625 | |
4a15001e | 626 | DBG("Cleanup sessiond"); |
e07ae692 | 627 | |
4e449f3f MD |
628 | /* |
629 | * Close the thread quit pipe. It has already done its job, | |
630 | * since we are now called. | |
631 | */ | |
2f77fc4b DG |
632 | utils_close_pipe(thread_quit_pipe); |
633 | ||
35f90c40 DG |
634 | /* |
635 | * If opt_pidfile is undefined, the default file will be wiped when | |
636 | * removing the rundir. | |
637 | */ | |
638 | if (opt_pidfile) { | |
639 | ret = remove(opt_pidfile); | |
640 | if (ret < 0) { | |
641 | PERROR("remove pidfile %s", opt_pidfile); | |
642 | } | |
643 | } | |
644 | ||
8c6c56c2 MD |
645 | DBG("Removing sessiond and consumerd content of directory %s", rundir); |
646 | ||
647 | /* sessiond */ | |
648 | snprintf(path, PATH_MAX, | |
649 | "%s/%s", | |
650 | rundir, DEFAULT_LTTNG_SESSIOND_PIDFILE); | |
651 | DBG("Removing %s", path); | |
652 | (void) unlink(path); | |
653 | ||
cd9290dd | 654 | snprintf(path, PATH_MAX, "%s/%s", rundir, |
022d91ba | 655 | DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE); |
cd9290dd DG |
656 | DBG("Removing %s", path); |
657 | (void) unlink(path); | |
658 | ||
8c6c56c2 MD |
659 | /* kconsumerd */ |
660 | snprintf(path, PATH_MAX, | |
661 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, | |
662 | rundir); | |
663 | DBG("Removing %s", path); | |
664 | (void) unlink(path); | |
665 | ||
666 | snprintf(path, PATH_MAX, | |
667 | DEFAULT_KCONSUMERD_PATH, | |
668 | rundir); | |
669 | DBG("Removing directory %s", path); | |
670 | (void) rmdir(path); | |
671 | ||
672 | /* ust consumerd 32 */ | |
673 | snprintf(path, PATH_MAX, | |
674 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, | |
675 | rundir); | |
676 | DBG("Removing %s", path); | |
677 | (void) unlink(path); | |
678 | ||
679 | snprintf(path, PATH_MAX, | |
680 | DEFAULT_USTCONSUMERD32_PATH, | |
681 | rundir); | |
682 | DBG("Removing directory %s", path); | |
683 | (void) rmdir(path); | |
684 | ||
685 | /* ust consumerd 64 */ | |
686 | snprintf(path, PATH_MAX, | |
687 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, | |
688 | rundir); | |
689 | DBG("Removing %s", path); | |
690 | (void) unlink(path); | |
691 | ||
692 | snprintf(path, PATH_MAX, | |
693 | DEFAULT_USTCONSUMERD64_PATH, | |
694 | rundir); | |
695 | DBG("Removing directory %s", path); | |
696 | (void) rmdir(path); | |
5461b305 | 697 | |
99bab54f | 698 | DBG("Cleaning up all sessions"); |
fac6795d | 699 | |
b5541356 | 700 | /* Destroy session list mutex */ |
273ea72c DG |
701 | if (session_list_ptr != NULL) { |
702 | pthread_mutex_destroy(&session_list_ptr->lock); | |
703 | ||
704 | /* Cleanup ALL session */ | |
54d01ffb DG |
705 | cds_list_for_each_entry_safe(sess, stmp, |
706 | &session_list_ptr->head, list) { | |
2f77fc4b | 707 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
708 | } |
709 | } | |
710 | ||
4e4714cb JR |
711 | wait_consumer(&kconsumer_data); |
712 | wait_consumer(&ustconsumer64_data); | |
713 | wait_consumer(&ustconsumer32_data); | |
714 | ||
6a4e4039 JG |
715 | DBG("Cleaning up all agent apps"); |
716 | agent_app_ht_clean(); | |
717 | ||
099e26bd | 718 | DBG("Closing all UST sockets"); |
56fff090 | 719 | ust_app_clean_list(); |
7972aab2 | 720 | buffer_reg_destroy_registries(); |
099e26bd | 721 | |
4fba7219 DG |
722 | if (is_root && !opt_no_kernel) { |
723 | DBG2("Closing kernel fd"); | |
a4b35e07 | 724 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
725 | ret = close(kernel_tracer_fd); |
726 | if (ret) { | |
727 | PERROR("close"); | |
728 | } | |
a4b35e07 | 729 | } |
2f50c8a3 | 730 | DBG("Unloading kernel modules"); |
096102bd | 731 | modprobe_remove_lttng_all(); |
834978fd | 732 | free(syscall_table); |
2f50c8a3 | 733 | } |
2f77fc4b | 734 | |
e975f9f8 DG |
735 | close_consumer_sockets(); |
736 | ||
ef367a93 JG |
737 | if (load_info) { |
738 | load_session_destroy_data(load_info); | |
739 | free(load_info); | |
740 | } | |
741 | ||
c9cb3e7d JG |
742 | /* |
743 | * Cleanup lock file by deleting it and finaly closing it which will | |
744 | * release the file system lock. | |
745 | */ | |
746 | if (lockfile_fd >= 0) { | |
747 | char lockfile_path[PATH_MAX]; | |
748 | ||
4a15001e MD |
749 | ret = generate_lock_file_path(lockfile_path, |
750 | sizeof(lockfile_path)); | |
c9cb3e7d JG |
751 | if (ret > 0) { |
752 | ret = remove(lockfile_path); | |
753 | if (ret < 0) { | |
754 | PERROR("remove lock file"); | |
755 | } | |
756 | ret = close(lockfile_fd); | |
757 | if (ret < 0) { | |
758 | PERROR("close lock file"); | |
759 | } | |
760 | } | |
761 | } | |
762 | ||
763 | /* | |
764 | * We do NOT rmdir rundir because there are other processes | |
765 | * using it, for instance lttng-relayd, which can start in | |
766 | * parallel with this teardown. | |
767 | */ | |
768 | ||
769 | free(rundir); | |
4a15001e MD |
770 | } |
771 | ||
772 | /* | |
773 | * Cleanup the daemon's option data structures. | |
774 | */ | |
775 | static void sessiond_cleanup_options(void) | |
776 | { | |
777 | DBG("Cleaning up options"); | |
778 | ||
779 | /* | |
780 | * If the override option is set, the pointer points to a *non* const | |
781 | * thus freeing it even though the variable type is set to const. | |
782 | */ | |
783 | if (tracing_group_name_override) { | |
784 | free((void *) tracing_group_name); | |
785 | } | |
786 | if (consumerd32_bin_override) { | |
787 | free((void *) consumerd32_bin); | |
788 | } | |
789 | if (consumerd64_bin_override) { | |
790 | free((void *) consumerd64_bin); | |
791 | } | |
792 | if (consumerd32_libdir_override) { | |
793 | free((void *) consumerd32_libdir); | |
794 | } | |
795 | if (consumerd64_libdir_override) { | |
796 | free((void *) consumerd64_libdir); | |
797 | } | |
798 | ||
799 | free(opt_pidfile); | |
800 | free(opt_load_session_path); | |
801 | free(kmod_probes_list); | |
802 | free(kmod_extra_probes_list); | |
c9cb3e7d | 803 | |
7567352f MD |
804 | run_as_destroy_worker(); |
805 | ||
421cb601 | 806 | /* <fun> */ |
f56a39af | 807 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
808 | "Matthew, BEET driven development works!%c[%dm", |
809 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
810 | /* </fun> */ | |
fac6795d DG |
811 | } |
812 | ||
e065084a | 813 | /* |
d063d709 | 814 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 815 | * |
d063d709 | 816 | * Return lttcomm error code. |
e065084a DG |
817 | */ |
818 | static int send_unix_sock(int sock, void *buf, size_t len) | |
819 | { | |
820 | /* Check valid length */ | |
c617c0c6 | 821 | if (len == 0) { |
e065084a DG |
822 | return -1; |
823 | } | |
824 | ||
825 | return lttcomm_send_unix_sock(sock, buf, len); | |
826 | } | |
827 | ||
5461b305 | 828 | /* |
d063d709 | 829 | * Free memory of a command context structure. |
5461b305 | 830 | */ |
a2fb29a5 | 831 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 832 | { |
a2fb29a5 DG |
833 | DBG("Clean command context structure"); |
834 | if (*cmd_ctx) { | |
835 | if ((*cmd_ctx)->llm) { | |
836 | free((*cmd_ctx)->llm); | |
5461b305 | 837 | } |
a2fb29a5 DG |
838 | if ((*cmd_ctx)->lsm) { |
839 | free((*cmd_ctx)->lsm); | |
5461b305 | 840 | } |
a2fb29a5 DG |
841 | free(*cmd_ctx); |
842 | *cmd_ctx = NULL; | |
5461b305 DG |
843 | } |
844 | } | |
845 | ||
fac6795d | 846 | /* |
0fdd1e2c | 847 | * Notify UST applications using the shm mmap futex. |
fac6795d | 848 | */ |
0fdd1e2c | 849 | static int notify_ust_apps(int active) |
fac6795d | 850 | { |
0fdd1e2c | 851 | char *wait_shm_mmap; |
fac6795d | 852 | |
0fdd1e2c | 853 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 854 | |
0fdd1e2c DG |
855 | /* See shm.c for this call implying mmap, shm and futex calls */ |
856 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
857 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
858 | goto error; |
859 | } | |
860 | ||
0fdd1e2c DG |
861 | /* Wake waiting process */ |
862 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
863 | ||
864 | /* Apps notified successfully */ | |
865 | return 0; | |
fac6795d DG |
866 | |
867 | error: | |
0fdd1e2c | 868 | return -1; |
fac6795d DG |
869 | } |
870 | ||
e065084a | 871 | /* |
d063d709 DG |
872 | * Setup the outgoing data buffer for the response (llm) by allocating the |
873 | * right amount of memory and copying the original information from the lsm | |
874 | * structure. | |
ca95a216 | 875 | * |
d063d709 | 876 | * Return total size of the buffer pointed by buf. |
ca95a216 | 877 | */ |
5461b305 | 878 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 879 | { |
f3ed775e | 880 | int ret, buf_size; |
ca95a216 | 881 | |
f3ed775e | 882 | buf_size = size; |
5461b305 | 883 | |
ba7f0ae5 | 884 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 885 | if (cmd_ctx->llm == NULL) { |
76d7553f | 886 | PERROR("zmalloc"); |
5461b305 | 887 | ret = -ENOMEM; |
ca95a216 DG |
888 | goto error; |
889 | } | |
890 | ||
5461b305 DG |
891 | /* Copy common data */ |
892 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 893 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 894 | |
5461b305 DG |
895 | cmd_ctx->llm->data_size = size; |
896 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
897 | ||
ca95a216 DG |
898 | return buf_size; |
899 | ||
900 | error: | |
901 | return ret; | |
902 | } | |
903 | ||
7a485870 | 904 | /* |
5eb91c98 | 905 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 906 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 907 | */ |
5eb91c98 | 908 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 909 | { |
5eb91c98 | 910 | int ret; |
7a485870 DG |
911 | struct ltt_session *session; |
912 | struct ltt_kernel_channel *channel; | |
913 | ||
5eb91c98 | 914 | DBG("Updating kernel poll set"); |
7a485870 | 915 | |
54d01ffb | 916 | session_lock_list(); |
b5541356 | 917 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 918 | session_lock(session); |
7a485870 | 919 | if (session->kernel_session == NULL) { |
54d01ffb | 920 | session_unlock(session); |
7a485870 DG |
921 | continue; |
922 | } | |
7a485870 | 923 | |
54d01ffb DG |
924 | cds_list_for_each_entry(channel, |
925 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
926 | /* Add channel fd to the kernel poll set */ |
927 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
928 | if (ret < 0) { | |
54d01ffb | 929 | session_unlock(session); |
5eb91c98 DG |
930 | goto error; |
931 | } | |
932 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 933 | } |
54d01ffb | 934 | session_unlock(session); |
7a485870 | 935 | } |
54d01ffb | 936 | session_unlock_list(); |
7a485870 | 937 | |
5eb91c98 | 938 | return 0; |
7a485870 DG |
939 | |
940 | error: | |
54d01ffb | 941 | session_unlock_list(); |
7a485870 DG |
942 | return -1; |
943 | } | |
944 | ||
945 | /* | |
54d01ffb | 946 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 947 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 948 | * |
d063d709 | 949 | * Useful for CPU hotplug feature. |
7a485870 | 950 | */ |
2bdd86d4 | 951 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
952 | { |
953 | int ret = 0; | |
954 | struct ltt_session *session; | |
173af62f | 955 | struct ltt_kernel_session *ksess; |
7a485870 DG |
956 | struct ltt_kernel_channel *channel; |
957 | ||
958 | DBG("Updating kernel streams for channel fd %d", fd); | |
959 | ||
54d01ffb | 960 | session_lock_list(); |
b5541356 | 961 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 962 | session_lock(session); |
7a485870 | 963 | if (session->kernel_session == NULL) { |
54d01ffb | 964 | session_unlock(session); |
7a485870 DG |
965 | continue; |
966 | } | |
173af62f | 967 | ksess = session->kernel_session; |
d9800920 | 968 | |
4a15001e MD |
969 | cds_list_for_each_entry(channel, |
970 | &ksess->channel_list.head, list) { | |
971 | struct lttng_ht_iter iter; | |
972 | struct consumer_socket *socket; | |
d9800920 | 973 | |
4a15001e MD |
974 | if (channel->fd != fd) { |
975 | continue; | |
976 | } | |
977 | DBG("Channel found, updating kernel streams"); | |
978 | ret = kernel_open_channel_stream(channel); | |
979 | if (ret < 0) { | |
980 | goto error; | |
981 | } | |
982 | /* Update the stream global counter */ | |
983 | ksess->stream_count_global += ret; | |
984 | ||
985 | /* | |
986 | * Have we already sent fds to the consumer? If yes, it | |
987 | * means that tracing is started so it is safe to send | |
988 | * our updated stream fds. | |
989 | */ | |
990 | if (ksess->consumer_fds_sent != 1 | |
991 | || ksess->consumer == NULL) { | |
992 | ret = -1; | |
993 | goto error; | |
994 | } | |
995 | ||
996 | rcu_read_lock(); | |
997 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
998 | &iter.iter, socket, node.node) { | |
999 | pthread_mutex_lock(socket->lock); | |
1000 | ret = kernel_consumer_send_channel_stream(socket, | |
1001 | channel, ksess, | |
1002 | session->output_traces ? 1 : 0); | |
1003 | pthread_mutex_unlock(socket->lock); | |
1004 | if (ret < 0) { | |
e7fe706f | 1005 | rcu_read_unlock(); |
4a15001e | 1006 | goto error; |
7a485870 | 1007 | } |
7a485870 | 1008 | } |
4a15001e | 1009 | rcu_read_unlock(); |
7a485870 | 1010 | } |
54d01ffb | 1011 | session_unlock(session); |
7a485870 | 1012 | } |
54d01ffb | 1013 | session_unlock_list(); |
b3c750d2 | 1014 | return ret; |
7a485870 | 1015 | |
b3c750d2 | 1016 | error: |
54d01ffb DG |
1017 | session_unlock(session); |
1018 | session_unlock_list(); | |
7a485870 DG |
1019 | return ret; |
1020 | } | |
1021 | ||
487cf67c | 1022 | /* |
ffe60014 DG |
1023 | * For each tracing session, update newly registered apps. The session list |
1024 | * lock MUST be acquired before calling this. | |
487cf67c DG |
1025 | */ |
1026 | static void update_ust_app(int app_sock) | |
1027 | { | |
1028 | struct ltt_session *sess, *stmp; | |
1029 | ||
fdadac08 DG |
1030 | /* Consumer is in an ERROR state. Stop any application update. */ |
1031 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
1032 | /* Stop the update process since the consumer is dead. */ | |
1033 | return; | |
1034 | } | |
1035 | ||
487cf67c DG |
1036 | /* For all tracing session(s) */ |
1037 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
a9ad0c8f MD |
1038 | struct ust_app *app; |
1039 | ||
4ee14516 | 1040 | session_lock(sess); |
a9ad0c8f MD |
1041 | if (!sess->ust_session) { |
1042 | goto unlock_session; | |
1043 | } | |
1044 | ||
1045 | rcu_read_lock(); | |
1046 | assert(app_sock >= 0); | |
1047 | app = ust_app_find_by_sock(app_sock); | |
1048 | if (app == NULL) { | |
1049 | /* | |
1050 | * Application can be unregistered before so | |
1051 | * this is possible hence simply stopping the | |
1052 | * update. | |
1053 | */ | |
1054 | DBG3("UST app update failed to find app sock %d", | |
1055 | app_sock); | |
1056 | goto unlock_rcu; | |
421cb601 | 1057 | } |
a9ad0c8f MD |
1058 | ust_app_global_update(sess->ust_session, app); |
1059 | unlock_rcu: | |
1060 | rcu_read_unlock(); | |
1061 | unlock_session: | |
4ee14516 | 1062 | session_unlock(sess); |
487cf67c DG |
1063 | } |
1064 | } | |
1065 | ||
7a485870 | 1066 | /* |
d063d709 | 1067 | * This thread manage event coming from the kernel. |
7a485870 | 1068 | * |
d063d709 DG |
1069 | * Features supported in this thread: |
1070 | * -) CPU Hotplug | |
7a485870 DG |
1071 | */ |
1072 | static void *thread_manage_kernel(void *data) | |
1073 | { | |
139ac872 | 1074 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 1075 | uint32_t revents, nb_fd; |
7a485870 | 1076 | char tmp; |
5eb91c98 | 1077 | struct lttng_poll_event events; |
7a485870 | 1078 | |
6993eeb3 | 1079 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 1080 | |
6c71277b | 1081 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 1082 | |
d5d63bf1 DG |
1083 | /* |
1084 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 1085 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 1086 | */ |
6d737ce4 | 1087 | lttng_poll_init(&events); |
d5d63bf1 | 1088 | |
e547b070 | 1089 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
1090 | goto error_testpoint; |
1091 | } | |
8ac94142 | 1092 | |
840cb59c | 1093 | health_code_update(); |
44a5e5eb | 1094 | |
e547b070 | 1095 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 1096 | goto error_testpoint; |
6993eeb3 CB |
1097 | } |
1098 | ||
7a485870 | 1099 | while (1) { |
840cb59c | 1100 | health_code_update(); |
44a5e5eb | 1101 | |
7a485870 | 1102 | if (update_poll_flag == 1) { |
d21b0d71 DG |
1103 | /* Clean events object. We are about to populate it again. */ |
1104 | lttng_poll_clean(&events); | |
1105 | ||
d0b96690 | 1106 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
1107 | if (ret < 0) { |
1108 | goto error_poll_create; | |
1109 | } | |
1110 | ||
1111 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
1112 | if (ret < 0) { | |
1113 | goto error; | |
1114 | } | |
5f822d0a | 1115 | |
d21b0d71 | 1116 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
1117 | ret = update_kernel_poll(&events); |
1118 | if (ret < 0) { | |
7a485870 DG |
1119 | goto error; |
1120 | } | |
1121 | update_poll_flag = 0; | |
1122 | } | |
1123 | ||
7fa2082e | 1124 | DBG("Thread kernel polling"); |
7a485870 DG |
1125 | |
1126 | /* Poll infinite value of time */ | |
88f2b785 | 1127 | restart: |
a78af745 | 1128 | health_poll_entry(); |
5eb91c98 | 1129 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1130 | DBG("Thread kernel return from poll on %d fds", |
1131 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1132 | health_poll_exit(); |
7a485870 | 1133 | if (ret < 0) { |
88f2b785 MD |
1134 | /* |
1135 | * Restart interrupted system call. | |
1136 | */ | |
1137 | if (errno == EINTR) { | |
1138 | goto restart; | |
1139 | } | |
7a485870 DG |
1140 | goto error; |
1141 | } else if (ret == 0) { | |
1142 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
1143 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
1144 | "This should not have happened! Continuing..."); | |
7a485870 DG |
1145 | continue; |
1146 | } | |
1147 | ||
0d9c5d77 DG |
1148 | nb_fd = ret; |
1149 | ||
5eb91c98 DG |
1150 | for (i = 0; i < nb_fd; i++) { |
1151 | /* Fetch once the poll data */ | |
1152 | revents = LTTNG_POLL_GETEV(&events, i); | |
1153 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 1154 | |
840cb59c | 1155 | health_code_update(); |
44a5e5eb | 1156 | |
fd20dac9 MD |
1157 | if (!revents) { |
1158 | /* No activity for this FD (poll implementation). */ | |
1159 | continue; | |
1160 | } | |
1161 | ||
5eb91c98 | 1162 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1163 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1164 | if (ret) { |
139ac872 MD |
1165 | err = 0; |
1166 | goto exit; | |
5eb91c98 | 1167 | } |
7a485870 | 1168 | |
5eb91c98 | 1169 | /* Check for data on kernel pipe */ |
03e43155 MD |
1170 | if (revents & LPOLLIN) { |
1171 | if (pollfd == kernel_poll_pipe[0]) { | |
1172 | (void) lttng_read(kernel_poll_pipe[0], | |
1173 | &tmp, 1); | |
1174 | /* | |
1175 | * Ret value is useless here, if this pipe gets any actions an | |
1176 | * update is required anyway. | |
1177 | */ | |
1178 | update_poll_flag = 1; | |
1179 | continue; | |
1180 | } else { | |
1181 | /* | |
1182 | * New CPU detected by the kernel. Adding kernel stream to | |
1183 | * kernel session and updating the kernel consumer | |
1184 | */ | |
2bdd86d4 | 1185 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
1186 | if (ret < 0) { |
1187 | continue; | |
1188 | } | |
1189 | break; | |
7a485870 | 1190 | } |
03e43155 MD |
1191 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1192 | update_poll_flag = 1; | |
1193 | continue; | |
1194 | } else { | |
1195 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1196 | goto error; | |
7a485870 DG |
1197 | } |
1198 | } | |
1199 | } | |
1200 | ||
139ac872 | 1201 | exit: |
7a485870 | 1202 | error: |
5eb91c98 | 1203 | lttng_poll_clean(&events); |
76d7553f | 1204 | error_poll_create: |
6993eeb3 | 1205 | error_testpoint: |
6620da75 DG |
1206 | utils_close_pipe(kernel_poll_pipe); |
1207 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 1208 | if (err) { |
840cb59c | 1209 | health_error(); |
139ac872 | 1210 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
1211 | WARN("Kernel thread died unexpectedly. " |
1212 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 1213 | } |
8782cc74 | 1214 | health_unregister(health_sessiond); |
76d7553f | 1215 | DBG("Kernel thread dying"); |
7a485870 DG |
1216 | return NULL; |
1217 | } | |
1218 | ||
a23ec3a7 DG |
1219 | /* |
1220 | * Signal pthread condition of the consumer data that the thread. | |
1221 | */ | |
1222 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
1223 | { | |
1224 | pthread_mutex_lock(&data->cond_mutex); | |
1225 | ||
1226 | /* | |
1227 | * The state is set before signaling. It can be any value, it's the waiter | |
1228 | * job to correctly interpret this condition variable associated to the | |
1229 | * consumer pthread_cond. | |
1230 | * | |
1231 | * A value of 0 means that the corresponding thread of the consumer data | |
1232 | * was not started. 1 indicates that the thread has started and is ready | |
1233 | * for action. A negative value means that there was an error during the | |
1234 | * thread bootstrap. | |
1235 | */ | |
1236 | data->consumer_thread_is_ready = state; | |
1237 | (void) pthread_cond_signal(&data->cond); | |
1238 | ||
1239 | pthread_mutex_unlock(&data->cond_mutex); | |
1240 | } | |
1241 | ||
1d4b027a | 1242 | /* |
3bd1e081 | 1243 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1244 | */ |
3bd1e081 | 1245 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1246 | { |
42fc1d0b | 1247 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 1248 | uint32_t revents, nb_fd; |
1d4b027a | 1249 | enum lttcomm_return_code code; |
5eb91c98 | 1250 | struct lttng_poll_event events; |
3bd1e081 | 1251 | struct consumer_data *consumer_data = data; |
1d4b027a | 1252 | |
3bd1e081 | 1253 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1254 | |
34c1e15a MD |
1255 | rcu_register_thread(); |
1256 | rcu_thread_online(); | |
1257 | ||
6c71277b | 1258 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1259 | |
855060f8 | 1260 | health_code_update(); |
9449cc75 | 1261 | |
5eb91c98 | 1262 | /* |
331744e3 JD |
1263 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1264 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1265 | */ |
331744e3 | 1266 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1267 | if (ret < 0) { |
76d7553f | 1268 | goto error_poll; |
5eb91c98 | 1269 | } |
273ea72c | 1270 | |
edb8b045 DG |
1271 | /* |
1272 | * The error socket here is already in a listening state which was done | |
1273 | * just before spawning this thread to avoid a race between the consumer | |
1274 | * daemon exec trying to connect and the listen() call. | |
1275 | */ | |
3bd1e081 | 1276 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1277 | if (ret < 0) { |
1278 | goto error; | |
1279 | } | |
1280 | ||
840cb59c | 1281 | health_code_update(); |
44a5e5eb | 1282 | |
331744e3 | 1283 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1284 | restart: |
a78af745 | 1285 | health_poll_entry(); |
8ac94142 | 1286 | |
e547b070 | 1287 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
1288 | goto error; |
1289 | } | |
8ac94142 | 1290 | |
5eb91c98 | 1291 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1292 | health_poll_exit(); |
273ea72c | 1293 | if (ret < 0) { |
88f2b785 MD |
1294 | /* |
1295 | * Restart interrupted system call. | |
1296 | */ | |
1297 | if (errno == EINTR) { | |
1298 | goto restart; | |
1299 | } | |
273ea72c DG |
1300 | goto error; |
1301 | } | |
1302 | ||
0d9c5d77 DG |
1303 | nb_fd = ret; |
1304 | ||
5eb91c98 DG |
1305 | for (i = 0; i < nb_fd; i++) { |
1306 | /* Fetch once the poll data */ | |
1307 | revents = LTTNG_POLL_GETEV(&events, i); | |
1308 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1309 | ||
840cb59c | 1310 | health_code_update(); |
44a5e5eb | 1311 | |
fd20dac9 MD |
1312 | if (!revents) { |
1313 | /* No activity for this FD (poll implementation). */ | |
1314 | continue; | |
1315 | } | |
1316 | ||
5eb91c98 | 1317 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1318 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1319 | if (ret) { |
139ac872 MD |
1320 | err = 0; |
1321 | goto exit; | |
5eb91c98 DG |
1322 | } |
1323 | ||
1324 | /* Event on the registration socket */ | |
3bd1e081 | 1325 | if (pollfd == consumer_data->err_sock) { |
03e43155 MD |
1326 | if (revents & LPOLLIN) { |
1327 | continue; | |
1328 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1329 | ERR("consumer err socket poll error"); |
5eb91c98 | 1330 | goto error; |
03e43155 MD |
1331 | } else { |
1332 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1333 | goto error; | |
5eb91c98 DG |
1334 | } |
1335 | } | |
273ea72c DG |
1336 | } |
1337 | ||
3bd1e081 | 1338 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1339 | if (sock < 0) { |
1340 | goto error; | |
1341 | } | |
1342 | ||
b662582b DG |
1343 | /* |
1344 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1345 | * show must go on. | |
1346 | */ | |
1347 | (void) utils_set_fd_cloexec(sock); | |
1348 | ||
840cb59c | 1349 | health_code_update(); |
44a5e5eb | 1350 | |
3bd1e081 | 1351 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1352 | |
712ea556 | 1353 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1354 | ret = lttcomm_recv_unix_sock(sock, &code, |
1355 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1356 | if (ret <= 0) { |
1357 | goto error; | |
1358 | } | |
1359 | ||
840cb59c | 1360 | health_code_update(); |
f73fabfd | 1361 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
331744e3 | 1362 | /* Connect both socket, command and metadata. */ |
3bd1e081 MD |
1363 | consumer_data->cmd_sock = |
1364 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
4ce514c4 | 1365 | consumer_data->metadata_fd = |
331744e3 | 1366 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); |
92db7cdc DG |
1367 | if (consumer_data->cmd_sock < 0 |
1368 | || consumer_data->metadata_fd < 0) { | |
331744e3 | 1369 | PERROR("consumer connect cmd socket"); |
a23ec3a7 DG |
1370 | /* On error, signal condition and quit. */ |
1371 | signal_consumer_condition(consumer_data, -1); | |
1d4b027a DG |
1372 | goto error; |
1373 | } | |
9363801e | 1374 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; |
331744e3 JD |
1375 | /* Create metadata socket lock. */ |
1376 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1377 | if (consumer_data->metadata_sock.lock == NULL) { | |
1378 | PERROR("zmalloc pthread mutex"); | |
1379 | ret = -1; | |
1380 | goto error; | |
1381 | } | |
1382 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1383 | ||
a23ec3a7 | 1384 | signal_consumer_condition(consumer_data, 1); |
331744e3 JD |
1385 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); |
1386 | DBG("Consumer metadata socket ready (fd: %d)", | |
4ce514c4 | 1387 | consumer_data->metadata_fd); |
1d4b027a | 1388 | } else { |
3bd1e081 | 1389 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1390 | lttcomm_get_readable_code(-code)); |
1391 | goto error; | |
1392 | } | |
1393 | ||
331744e3 | 1394 | /* Remove the consumerd error sock since we've established a connexion */ |
3bd1e081 | 1395 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1396 | if (ret < 0) { |
72079cae DG |
1397 | goto error; |
1398 | } | |
1399 | ||
331744e3 | 1400 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1401 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1402 | if (ret < 0) { | |
72079cae | 1403 | goto error; |
5eb91c98 DG |
1404 | } |
1405 | ||
331744e3 | 1406 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1407 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1408 | LPOLLIN | LPOLLRDHUP); |
1409 | if (ret < 0) { | |
1410 | goto error; | |
1411 | } | |
1412 | ||
840cb59c | 1413 | health_code_update(); |
44a5e5eb | 1414 | |
331744e3 | 1415 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1416 | restart_poll: |
331744e3 | 1417 | while (1) { |
42fc1d0b DG |
1418 | health_code_update(); |
1419 | ||
1420 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
1421 | if (should_quit) { | |
1422 | /* Not a health error. */ | |
1423 | err = 0; | |
1424 | goto exit; | |
1425 | } | |
1426 | ||
331744e3 JD |
1427 | health_poll_entry(); |
1428 | ret = lttng_poll_wait(&events, -1); | |
1429 | health_poll_exit(); | |
1430 | if (ret < 0) { | |
1431 | /* | |
1432 | * Restart interrupted system call. | |
1433 | */ | |
1434 | if (errno == EINTR) { | |
1435 | goto restart_poll; | |
1436 | } | |
1437 | goto error; | |
88f2b785 | 1438 | } |
72079cae | 1439 | |
331744e3 | 1440 | nb_fd = ret; |
0d9c5d77 | 1441 | |
331744e3 JD |
1442 | for (i = 0; i < nb_fd; i++) { |
1443 | /* Fetch once the poll data */ | |
1444 | revents = LTTNG_POLL_GETEV(&events, i); | |
1445 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1446 | |
331744e3 | 1447 | health_code_update(); |
44a5e5eb | 1448 | |
fd20dac9 MD |
1449 | if (!revents) { |
1450 | /* No activity for this FD (poll implementation). */ | |
1451 | continue; | |
1452 | } | |
1453 | ||
42fc1d0b DG |
1454 | /* |
1455 | * Thread quit pipe has been triggered, flag that we should stop | |
1456 | * but continue the current loop to handle potential data from | |
1457 | * consumer. | |
1458 | */ | |
1459 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 1460 | |
331744e3 JD |
1461 | if (pollfd == sock) { |
1462 | /* Event on the consumerd socket */ | |
03e43155 MD |
1463 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1464 | && !(revents & LPOLLIN)) { | |
331744e3 JD |
1465 | ERR("consumer err socket second poll error"); |
1466 | goto error; | |
1467 | } | |
1468 | health_code_update(); | |
1469 | /* Wait for any kconsumerd error */ | |
1470 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1471 | sizeof(enum lttcomm_return_code)); | |
1472 | if (ret <= 0) { | |
1473 | ERR("consumer closed the command socket"); | |
1474 | goto error; | |
1475 | } | |
1476 | ||
1477 | ERR("consumer return code : %s", | |
1478 | lttcomm_get_readable_code(-code)); | |
1479 | ||
1480 | goto exit; | |
4ce514c4 | 1481 | } else if (pollfd == consumer_data->metadata_fd) { |
03e43155 MD |
1482 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1483 | && !(revents & LPOLLIN)) { | |
1484 | ERR("consumer err metadata socket second poll error"); | |
1485 | goto error; | |
1486 | } | |
331744e3 JD |
1487 | /* UST metadata requests */ |
1488 | ret = ust_consumer_metadata_request( | |
1489 | &consumer_data->metadata_sock); | |
1490 | if (ret < 0) { | |
1491 | ERR("Handling metadata request"); | |
1492 | goto error; | |
1493 | } | |
5eb91c98 | 1494 | } |
42fc1d0b | 1495 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 1496 | } |
331744e3 | 1497 | health_code_update(); |
5eb91c98 DG |
1498 | } |
1499 | ||
139ac872 | 1500 | exit: |
1d4b027a | 1501 | error: |
fdadac08 DG |
1502 | /* |
1503 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1504 | * thread might be using them so get exclusive access which will abort all |
1505 | * other consumer command by other threads. | |
fdadac08 DG |
1506 | */ |
1507 | pthread_mutex_lock(&consumer_data->lock); | |
1508 | ||
5c827ce0 DG |
1509 | /* Immediately set the consumerd state to stopped */ |
1510 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1511 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1512 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1513 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1514 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1515 | } else { | |
1516 | /* Code flow error... */ | |
1517 | assert(0); | |
1518 | } | |
1519 | ||
76d7553f MD |
1520 | if (consumer_data->err_sock >= 0) { |
1521 | ret = close(consumer_data->err_sock); | |
1522 | if (ret) { | |
1523 | PERROR("close"); | |
1524 | } | |
a76cbd9f | 1525 | consumer_data->err_sock = -1; |
76d7553f MD |
1526 | } |
1527 | if (consumer_data->cmd_sock >= 0) { | |
1528 | ret = close(consumer_data->cmd_sock); | |
1529 | if (ret) { | |
1530 | PERROR("close"); | |
1531 | } | |
a76cbd9f | 1532 | consumer_data->cmd_sock = -1; |
76d7553f | 1533 | } |
96544455 SS |
1534 | if (consumer_data->metadata_sock.fd_ptr && |
1535 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1536 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1537 | if (ret) { |
1538 | PERROR("close"); | |
1539 | } | |
1540 | } | |
76d7553f MD |
1541 | if (sock >= 0) { |
1542 | ret = close(sock); | |
1543 | if (ret) { | |
1544 | PERROR("close"); | |
1545 | } | |
1546 | } | |
273ea72c | 1547 | |
3bd1e081 MD |
1548 | unlink(consumer_data->err_unix_sock_path); |
1549 | unlink(consumer_data->cmd_unix_sock_path); | |
fdadac08 | 1550 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1551 | |
fdadac08 | 1552 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1553 | if (consumer_data->metadata_sock.lock) { |
1554 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1555 | free(consumer_data->metadata_sock.lock); | |
1556 | } | |
5eb91c98 | 1557 | lttng_poll_clean(&events); |
76d7553f | 1558 | error_poll: |
139ac872 | 1559 | if (err) { |
840cb59c | 1560 | health_error(); |
139ac872 MD |
1561 | ERR("Health error occurred in %s", __func__); |
1562 | } | |
8782cc74 | 1563 | health_unregister(health_sessiond); |
76d7553f | 1564 | DBG("consumer thread cleanup completed"); |
0177d773 | 1565 | |
34c1e15a MD |
1566 | rcu_thread_offline(); |
1567 | rcu_unregister_thread(); | |
1568 | ||
5eb91c98 | 1569 | return NULL; |
099e26bd DG |
1570 | } |
1571 | ||
099e26bd DG |
1572 | /* |
1573 | * This thread manage application communication. | |
1d4b027a DG |
1574 | */ |
1575 | static void *thread_manage_apps(void *data) | |
099e26bd | 1576 | { |
139ac872 | 1577 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1578 | ssize_t size_ret; |
5eb91c98 | 1579 | uint32_t revents, nb_fd; |
5eb91c98 | 1580 | struct lttng_poll_event events; |
099e26bd DG |
1581 | |
1582 | DBG("[thread] Manage application started"); | |
1583 | ||
f6a9efaa DG |
1584 | rcu_register_thread(); |
1585 | rcu_thread_online(); | |
1586 | ||
6c71277b | 1587 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1588 | |
e547b070 | 1589 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1590 | goto error_testpoint; |
1591 | } | |
1592 | ||
840cb59c | 1593 | health_code_update(); |
44a5e5eb | 1594 | |
d0b96690 | 1595 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1596 | if (ret < 0) { |
76d7553f | 1597 | goto error_poll_create; |
5eb91c98 | 1598 | } |
099e26bd | 1599 | |
5eb91c98 DG |
1600 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1601 | if (ret < 0) { | |
1602 | goto error; | |
1603 | } | |
099e26bd | 1604 | |
e547b070 | 1605 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1606 | goto error; |
1607 | } | |
8ac94142 | 1608 | |
840cb59c | 1609 | health_code_update(); |
44a5e5eb | 1610 | |
5eb91c98 | 1611 | while (1) { |
7fa2082e | 1612 | DBG("Apps thread polling"); |
099e26bd DG |
1613 | |
1614 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1615 | restart: |
a78af745 | 1616 | health_poll_entry(); |
5eb91c98 | 1617 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1618 | DBG("Apps thread return from poll on %d fds", |
1619 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1620 | health_poll_exit(); |
099e26bd | 1621 | if (ret < 0) { |
88f2b785 MD |
1622 | /* |
1623 | * Restart interrupted system call. | |
1624 | */ | |
1625 | if (errno == EINTR) { | |
1626 | goto restart; | |
1627 | } | |
099e26bd DG |
1628 | goto error; |
1629 | } | |
1630 | ||
0d9c5d77 DG |
1631 | nb_fd = ret; |
1632 | ||
5eb91c98 DG |
1633 | for (i = 0; i < nb_fd; i++) { |
1634 | /* Fetch once the poll data */ | |
1635 | revents = LTTNG_POLL_GETEV(&events, i); | |
1636 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1637 | ||
840cb59c | 1638 | health_code_update(); |
44a5e5eb | 1639 | |
fd20dac9 MD |
1640 | if (!revents) { |
1641 | /* No activity for this FD (poll implementation). */ | |
1642 | continue; | |
1643 | } | |
1644 | ||
5eb91c98 | 1645 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1646 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1647 | if (ret) { |
139ac872 MD |
1648 | err = 0; |
1649 | goto exit; | |
5eb91c98 | 1650 | } |
099e26bd | 1651 | |
5eb91c98 DG |
1652 | /* Inspect the apps cmd pipe */ |
1653 | if (pollfd == apps_cmd_pipe[0]) { | |
03e43155 | 1654 | if (revents & LPOLLIN) { |
d0b96690 DG |
1655 | int sock; |
1656 | ||
5eb91c98 | 1657 | /* Empty pipe */ |
6cd525e8 MD |
1658 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1659 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1660 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1661 | goto error; |
1662 | } | |
099e26bd | 1663 | |
840cb59c | 1664 | health_code_update(); |
44a5e5eb | 1665 | |
ffe60014 | 1666 | /* |
03e43155 MD |
1667 | * Since this is a command socket (write then read), |
1668 | * we only monitor the error events of the socket. | |
ffe60014 | 1669 | */ |
d0b96690 DG |
1670 | ret = lttng_poll_add(&events, sock, |
1671 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1672 | if (ret < 0) { | |
5eb91c98 | 1673 | goto error; |
e0c7ec2b | 1674 | } |
acc7b41b | 1675 | |
d0b96690 | 1676 | DBG("Apps with sock %d added to poll set", sock); |
03e43155 MD |
1677 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1678 | ERR("Apps command pipe error"); | |
1679 | goto error; | |
1680 | } else { | |
1681 | ERR("Unknown poll events %u for sock %d", revents, pollfd); | |
1682 | goto error; | |
0177d773 | 1683 | } |
5eb91c98 DG |
1684 | } else { |
1685 | /* | |
54d01ffb DG |
1686 | * At this point, we know that a registered application made |
1687 | * the event at poll_wait. | |
5eb91c98 DG |
1688 | */ |
1689 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1690 | /* Removing from the poll set */ | |
1691 | ret = lttng_poll_del(&events, pollfd); | |
1692 | if (ret < 0) { | |
1693 | goto error; | |
1694 | } | |
099e26bd | 1695 | |
b9d9b220 | 1696 | /* Socket closed on remote end. */ |
56fff090 | 1697 | ust_app_unregister(pollfd); |
03e43155 MD |
1698 | } else { |
1699 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1700 | goto error; | |
5eb91c98 | 1701 | } |
099e26bd | 1702 | } |
44a5e5eb | 1703 | |
840cb59c | 1704 | health_code_update(); |
099e26bd | 1705 | } |
099e26bd DG |
1706 | } |
1707 | ||
139ac872 | 1708 | exit: |
099e26bd | 1709 | error: |
5eb91c98 | 1710 | lttng_poll_clean(&events); |
76d7553f | 1711 | error_poll_create: |
6993eeb3 | 1712 | error_testpoint: |
6620da75 DG |
1713 | utils_close_pipe(apps_cmd_pipe); |
1714 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1715 | ||
1716 | /* | |
1717 | * We don't clean the UST app hash table here since already registered | |
1718 | * applications can still be controlled so let them be until the session | |
1719 | * daemon dies or the applications stop. | |
1720 | */ | |
1721 | ||
139ac872 | 1722 | if (err) { |
840cb59c | 1723 | health_error(); |
139ac872 MD |
1724 | ERR("Health error occurred in %s", __func__); |
1725 | } | |
8782cc74 | 1726 | health_unregister(health_sessiond); |
76d7553f | 1727 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1728 | rcu_thread_offline(); |
1729 | rcu_unregister_thread(); | |
099e26bd DG |
1730 | return NULL; |
1731 | } | |
1732 | ||
d0b96690 | 1733 | /* |
d88aee68 DG |
1734 | * Send a socket to a thread This is called from the dispatch UST registration |
1735 | * thread once all sockets are set for the application. | |
d0b96690 | 1736 | * |
b85dc84c DG |
1737 | * The sock value can be invalid, we don't really care, the thread will handle |
1738 | * it and make the necessary cleanup if so. | |
1739 | * | |
d0b96690 DG |
1740 | * On success, return 0 else a negative value being the errno message of the |
1741 | * write(). | |
1742 | */ | |
d88aee68 | 1743 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1744 | { |
6cd525e8 | 1745 | ssize_t ret; |
d0b96690 | 1746 | |
b85dc84c DG |
1747 | /* |
1748 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1749 | * before calling this function being a shutdown state of the thread. | |
1750 | */ | |
1751 | if (fd < 0) { | |
1752 | ret = -EBADF; | |
1753 | goto error; | |
1754 | } | |
d0b96690 | 1755 | |
6cd525e8 MD |
1756 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1757 | if (ret < sizeof(sock)) { | |
d88aee68 | 1758 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1759 | if (ret < 0) { |
1760 | ret = -errno; | |
1761 | } | |
1762 | goto error; | |
1763 | } | |
1764 | ||
1765 | /* All good. Don't send back the write positive ret value. */ | |
1766 | ret = 0; | |
1767 | error: | |
6cd525e8 | 1768 | return (int) ret; |
d0b96690 DG |
1769 | } |
1770 | ||
f45e313d DG |
1771 | /* |
1772 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1773 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1774 | * notify socket is never received. | |
1775 | */ | |
1776 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1777 | { | |
1778 | int ret, nb_fd = 0, i; | |
1779 | unsigned int fd_added = 0; | |
1780 | struct lttng_poll_event events; | |
1781 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1782 | ||
1783 | assert(wait_queue); | |
1784 | ||
1785 | lttng_poll_init(&events); | |
1786 | ||
1787 | /* Just skip everything for an empty queue. */ | |
1788 | if (!wait_queue->count) { | |
1789 | goto end; | |
1790 | } | |
1791 | ||
1792 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1793 | if (ret < 0) { | |
1794 | goto error_create; | |
1795 | } | |
1796 | ||
1797 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1798 | &wait_queue->head, head) { | |
1799 | assert(wait_node->app); | |
1800 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1801 | LPOLLHUP | LPOLLERR); | |
1802 | if (ret < 0) { | |
1803 | goto error; | |
1804 | } | |
1805 | ||
1806 | fd_added = 1; | |
1807 | } | |
1808 | ||
1809 | if (!fd_added) { | |
1810 | goto end; | |
1811 | } | |
1812 | ||
1813 | /* | |
1814 | * Poll but don't block so we can quickly identify the faulty events and | |
1815 | * clean them afterwards from the wait queue. | |
1816 | */ | |
1817 | ret = lttng_poll_wait(&events, 0); | |
1818 | if (ret < 0) { | |
1819 | goto error; | |
1820 | } | |
1821 | nb_fd = ret; | |
1822 | ||
1823 | for (i = 0; i < nb_fd; i++) { | |
1824 | /* Get faulty FD. */ | |
1825 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1826 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1827 | ||
fd20dac9 MD |
1828 | if (!revents) { |
1829 | /* No activity for this FD (poll implementation). */ | |
1830 | continue; | |
1831 | } | |
1832 | ||
f45e313d DG |
1833 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1834 | &wait_queue->head, head) { | |
1835 | if (pollfd == wait_node->app->sock && | |
1836 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1837 | cds_list_del(&wait_node->head); | |
1838 | wait_queue->count--; | |
1839 | ust_app_destroy(wait_node->app); | |
1840 | free(wait_node); | |
48b40bcf JG |
1841 | /* |
1842 | * Silence warning of use-after-free in | |
1843 | * cds_list_for_each_entry_safe which uses | |
1844 | * __typeof__(*wait_node). | |
1845 | */ | |
1846 | wait_node = NULL; | |
f45e313d | 1847 | break; |
03e43155 MD |
1848 | } else { |
1849 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1850 | goto error; | |
f45e313d DG |
1851 | } |
1852 | } | |
1853 | } | |
1854 | ||
1855 | if (nb_fd > 0) { | |
1856 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1857 | } | |
1858 | ||
1859 | end: | |
1860 | lttng_poll_clean(&events); | |
1861 | return; | |
1862 | ||
1863 | error: | |
1864 | lttng_poll_clean(&events); | |
1865 | error_create: | |
1866 | ERR("Unable to sanitize wait queue"); | |
1867 | return; | |
1868 | } | |
1869 | ||
099e26bd DG |
1870 | /* |
1871 | * Dispatch request from the registration threads to the application | |
1872 | * communication thread. | |
1873 | */ | |
1874 | static void *thread_dispatch_ust_registration(void *data) | |
1875 | { | |
12e2b881 | 1876 | int ret, err = -1; |
8bdee6e2 | 1877 | struct cds_wfcq_node *node; |
099e26bd | 1878 | struct ust_command *ust_cmd = NULL; |
f45e313d DG |
1879 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1880 | struct ust_reg_wait_queue wait_queue = { | |
1881 | .count = 0, | |
1882 | }; | |
d0b96690 | 1883 | |
6c71277b | 1884 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1885 | |
9ad42ec1 MD |
1886 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1887 | goto error_testpoint; | |
1888 | } | |
1889 | ||
12e2b881 MD |
1890 | health_code_update(); |
1891 | ||
f45e313d | 1892 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1893 | |
1894 | DBG("[thread] Dispatch UST command started"); | |
1895 | ||
26c9d55e | 1896 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
12e2b881 MD |
1897 | health_code_update(); |
1898 | ||
099e26bd DG |
1899 | /* Atomically prepare the queue futex */ |
1900 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1901 | ||
1902 | do { | |
d0b96690 | 1903 | struct ust_app *app = NULL; |
7972aab2 | 1904 | ust_cmd = NULL; |
d0b96690 | 1905 | |
f45e313d DG |
1906 | /* |
1907 | * Make sure we don't have node(s) that have hung up before receiving | |
1908 | * the notify socket. This is to clean the list in order to avoid | |
1909 | * memory leaks from notify socket that are never seen. | |
1910 | */ | |
1911 | sanitize_wait_queue(&wait_queue); | |
1912 | ||
12e2b881 | 1913 | health_code_update(); |
099e26bd | 1914 | /* Dequeue command for registration */ |
8bdee6e2 | 1915 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1916 | if (node == NULL) { |
00a17c97 | 1917 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1918 | /* Continue thread execution */ |
1919 | break; | |
1920 | } | |
1921 | ||
1922 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1923 | ||
2f50c8a3 DG |
1924 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1925 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1926 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1927 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1928 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1929 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1930 | |
1931 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1932 | wait_node = zmalloc(sizeof(*wait_node)); | |
1933 | if (!wait_node) { | |
1934 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1935 | ret = close(ust_cmd->sock); |
1936 | if (ret < 0) { | |
1937 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1938 | } | |
51dec90d | 1939 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1940 | free(ust_cmd); |
d0b96690 DG |
1941 | goto error; |
1942 | } | |
1943 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1944 | ||
1945 | /* Create application object if socket is CMD. */ | |
1946 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1947 | ust_cmd->sock); | |
1948 | if (!wait_node->app) { | |
1949 | ret = close(ust_cmd->sock); | |
1950 | if (ret < 0) { | |
1951 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1952 | } |
51dec90d | 1953 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1954 | free(wait_node); |
7972aab2 | 1955 | free(ust_cmd); |
d0b96690 DG |
1956 | continue; |
1957 | } | |
1958 | /* | |
1959 | * Add application to the wait queue so we can set the notify | |
1960 | * socket before putting this object in the global ht. | |
1961 | */ | |
f45e313d DG |
1962 | cds_list_add(&wait_node->head, &wait_queue.head); |
1963 | wait_queue.count++; | |
d0b96690 | 1964 | |
7972aab2 | 1965 | free(ust_cmd); |
d0b96690 DG |
1966 | /* |
1967 | * We have to continue here since we don't have the notify | |
1968 | * socket and the application MUST be added to the hash table | |
1969 | * only at that moment. | |
1970 | */ | |
1971 | continue; | |
1972 | } else { | |
1973 | /* | |
1974 | * Look for the application in the local wait queue and set the | |
1975 | * notify socket if found. | |
1976 | */ | |
d88aee68 | 1977 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1978 | &wait_queue.head, head) { |
12e2b881 | 1979 | health_code_update(); |
d0b96690 DG |
1980 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1981 | wait_node->app->notify_sock = ust_cmd->sock; | |
1982 | cds_list_del(&wait_node->head); | |
f45e313d | 1983 | wait_queue.count--; |
d0b96690 DG |
1984 | app = wait_node->app; |
1985 | free(wait_node); | |
1986 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1987 | break; | |
1988 | } | |
1989 | } | |
020d7f60 DG |
1990 | |
1991 | /* | |
1992 | * With no application at this stage the received socket is | |
1993 | * basically useless so close it before we free the cmd data | |
1994 | * structure for good. | |
1995 | */ | |
1996 | if (!app) { | |
1997 | ret = close(ust_cmd->sock); | |
1998 | if (ret < 0) { | |
1999 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
2000 | } | |
51dec90d | 2001 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 2002 | } |
7972aab2 | 2003 | free(ust_cmd); |
d0b96690 DG |
2004 | } |
2005 | ||
2006 | if (app) { | |
d0b96690 DG |
2007 | /* |
2008 | * @session_lock_list | |
2009 | * | |
2010 | * Lock the global session list so from the register up to the | |
2011 | * registration done message, no thread can see the application | |
2012 | * and change its state. | |
2013 | */ | |
2014 | session_lock_list(); | |
2015 | rcu_read_lock(); | |
d88aee68 | 2016 | |
d0b96690 DG |
2017 | /* |
2018 | * Add application to the global hash table. This needs to be | |
2019 | * done before the update to the UST registry can locate the | |
2020 | * application. | |
2021 | */ | |
2022 | ust_app_add(app); | |
d88aee68 DG |
2023 | |
2024 | /* Set app version. This call will print an error if needed. */ | |
2025 | (void) ust_app_version(app); | |
2026 | ||
2027 | /* Send notify socket through the notify pipe. */ | |
2028 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
2029 | app->notify_sock); | |
2030 | if (ret < 0) { | |
2031 | rcu_read_unlock(); | |
2032 | session_unlock_list(); | |
b85dc84c DG |
2033 | /* |
2034 | * No notify thread, stop the UST tracing. However, this is | |
2035 | * not an internal error of the this thread thus setting | |
2036 | * the health error code to a normal exit. | |
2037 | */ | |
2038 | err = 0; | |
d88aee68 | 2039 | goto error; |
6620da75 | 2040 | } |
d88aee68 | 2041 | |
d0b96690 DG |
2042 | /* |
2043 | * Update newly registered application with the tracing | |
2044 | * registry info already enabled information. | |
2045 | */ | |
2046 | update_ust_app(app->sock); | |
d88aee68 DG |
2047 | |
2048 | /* | |
2049 | * Don't care about return value. Let the manage apps threads | |
2050 | * handle app unregistration upon socket close. | |
2051 | */ | |
fb45065e | 2052 | (void) ust_app_register_done(app); |
d88aee68 DG |
2053 | |
2054 | /* | |
2055 | * Even if the application socket has been closed, send the app | |
2056 | * to the thread and unregistration will take place at that | |
2057 | * place. | |
2058 | */ | |
2059 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 2060 | if (ret < 0) { |
d88aee68 DG |
2061 | rcu_read_unlock(); |
2062 | session_unlock_list(); | |
b85dc84c DG |
2063 | /* |
2064 | * No apps. thread, stop the UST tracing. However, this is | |
2065 | * not an internal error of the this thread thus setting | |
2066 | * the health error code to a normal exit. | |
2067 | */ | |
2068 | err = 0; | |
d88aee68 | 2069 | goto error; |
d0b96690 | 2070 | } |
d88aee68 | 2071 | |
d0b96690 DG |
2072 | rcu_read_unlock(); |
2073 | session_unlock_list(); | |
099e26bd | 2074 | } |
099e26bd DG |
2075 | } while (node != NULL); |
2076 | ||
12e2b881 | 2077 | health_poll_entry(); |
099e26bd DG |
2078 | /* Futex wait on queue. Blocking call on futex() */ |
2079 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 2080 | health_poll_exit(); |
099e26bd | 2081 | } |
12e2b881 MD |
2082 | /* Normal exit, no error */ |
2083 | err = 0; | |
099e26bd DG |
2084 | |
2085 | error: | |
d88aee68 DG |
2086 | /* Clean up wait queue. */ |
2087 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 2088 | &wait_queue.head, head) { |
d88aee68 | 2089 | cds_list_del(&wait_node->head); |
f45e313d | 2090 | wait_queue.count--; |
d88aee68 DG |
2091 | free(wait_node); |
2092 | } | |
2093 | ||
772b8f4d MD |
2094 | /* Empty command queue. */ |
2095 | for (;;) { | |
2096 | /* Dequeue command for registration */ | |
2097 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); | |
2098 | if (node == NULL) { | |
2099 | break; | |
2100 | } | |
2101 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
2102 | ret = close(ust_cmd->sock); | |
2103 | if (ret < 0) { | |
2104 | PERROR("close ust sock exit dispatch %d", ust_cmd->sock); | |
2105 | } | |
2106 | lttng_fd_put(LTTNG_FD_APPS, 1); | |
2107 | free(ust_cmd); | |
2108 | } | |
2109 | ||
9ad42ec1 | 2110 | error_testpoint: |
099e26bd | 2111 | DBG("Dispatch thread dying"); |
12e2b881 MD |
2112 | if (err) { |
2113 | health_error(); | |
2114 | ERR("Health error occurred in %s", __func__); | |
2115 | } | |
8782cc74 | 2116 | health_unregister(health_sessiond); |
099e26bd DG |
2117 | return NULL; |
2118 | } | |
2119 | ||
2120 | /* | |
2121 | * This thread manage application registration. | |
2122 | */ | |
2123 | static void *thread_registration_apps(void *data) | |
1d4b027a | 2124 | { |
139ac872 | 2125 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
2126 | uint32_t revents, nb_fd; |
2127 | struct lttng_poll_event events; | |
099e26bd DG |
2128 | /* |
2129 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
2130 | * freed in the manage apps thread. | |
2131 | */ | |
2132 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 2133 | |
099e26bd | 2134 | DBG("[thread] Manage application registration started"); |
1d4b027a | 2135 | |
6c71277b | 2136 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 2137 | |
e547b070 | 2138 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
2139 | goto error_testpoint; |
2140 | } | |
8ac94142 | 2141 | |
1d4b027a DG |
2142 | ret = lttcomm_listen_unix_sock(apps_sock); |
2143 | if (ret < 0) { | |
76d7553f | 2144 | goto error_listen; |
1d4b027a DG |
2145 | } |
2146 | ||
5eb91c98 DG |
2147 | /* |
2148 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
2149 | * more will be added to this poll set. | |
2150 | */ | |
d0b96690 | 2151 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 2152 | if (ret < 0) { |
76d7553f | 2153 | goto error_create_poll; |
5eb91c98 | 2154 | } |
273ea72c | 2155 | |
5eb91c98 DG |
2156 | /* Add the application registration socket */ |
2157 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
2158 | if (ret < 0) { | |
76d7553f | 2159 | goto error_poll_add; |
5eb91c98 | 2160 | } |
273ea72c | 2161 | |
1d4b027a | 2162 | /* Notify all applications to register */ |
0fdd1e2c DG |
2163 | ret = notify_ust_apps(1); |
2164 | if (ret < 0) { | |
2165 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
2166 | "Execution continues but there might be problem for already\n" |
2167 | "running applications that wishes to register."); | |
0fdd1e2c | 2168 | } |
1d4b027a DG |
2169 | |
2170 | while (1) { | |
2171 | DBG("Accepting application registration"); | |
273ea72c DG |
2172 | |
2173 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 2174 | restart: |
a78af745 | 2175 | health_poll_entry(); |
5eb91c98 | 2176 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 2177 | health_poll_exit(); |
273ea72c | 2178 | if (ret < 0) { |
88f2b785 MD |
2179 | /* |
2180 | * Restart interrupted system call. | |
2181 | */ | |
2182 | if (errno == EINTR) { | |
2183 | goto restart; | |
2184 | } | |
273ea72c DG |
2185 | goto error; |
2186 | } | |
2187 | ||
0d9c5d77 DG |
2188 | nb_fd = ret; |
2189 | ||
5eb91c98 | 2190 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 2191 | health_code_update(); |
139ac872 | 2192 | |
5eb91c98 DG |
2193 | /* Fetch once the poll data */ |
2194 | revents = LTTNG_POLL_GETEV(&events, i); | |
2195 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 2196 | |
fd20dac9 MD |
2197 | if (!revents) { |
2198 | /* No activity for this FD (poll implementation). */ | |
2199 | continue; | |
2200 | } | |
2201 | ||
5eb91c98 | 2202 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 2203 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 2204 | if (ret) { |
139ac872 MD |
2205 | err = 0; |
2206 | goto exit; | |
90014c57 | 2207 | } |
1d4b027a | 2208 | |
5eb91c98 DG |
2209 | /* Event on the registration socket */ |
2210 | if (pollfd == apps_sock) { | |
03e43155 | 2211 | if (revents & LPOLLIN) { |
5eb91c98 DG |
2212 | sock = lttcomm_accept_unix_sock(apps_sock); |
2213 | if (sock < 0) { | |
2214 | goto error; | |
2215 | } | |
099e26bd | 2216 | |
16c5c8fa DG |
2217 | /* |
2218 | * Set socket timeout for both receiving and ending. | |
2219 | * app_socket_timeout is in seconds, whereas | |
2220 | * lttcomm_setsockopt_rcv_timeout and | |
2221 | * lttcomm_setsockopt_snd_timeout expect msec as | |
2222 | * parameter. | |
2223 | */ | |
2224 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
2225 | app_socket_timeout * 1000); | |
2226 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
2227 | app_socket_timeout * 1000); | |
2228 | ||
b662582b DG |
2229 | /* |
2230 | * Set the CLOEXEC flag. Return code is useless because | |
2231 | * either way, the show must go on. | |
2232 | */ | |
2233 | (void) utils_set_fd_cloexec(sock); | |
2234 | ||
5eb91c98 | 2235 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 2236 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 2237 | if (ust_cmd == NULL) { |
76d7553f | 2238 | PERROR("ust command zmalloc"); |
41ed8e47 MD |
2239 | ret = close(sock); |
2240 | if (ret) { | |
2241 | PERROR("close"); | |
2242 | } | |
5eb91c98 DG |
2243 | goto error; |
2244 | } | |
1d4b027a | 2245 | |
5eb91c98 DG |
2246 | /* |
2247 | * Using message-based transmissions to ensure we don't | |
2248 | * have to deal with partially received messages. | |
2249 | */ | |
4063050c MD |
2250 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
2251 | if (ret < 0) { | |
2252 | ERR("Exhausted file descriptors allowed for applications."); | |
2253 | free(ust_cmd); | |
2254 | ret = close(sock); | |
2255 | if (ret) { | |
2256 | PERROR("close"); | |
2257 | } | |
2258 | sock = -1; | |
2259 | continue; | |
2260 | } | |
d88aee68 | 2261 | |
840cb59c | 2262 | health_code_update(); |
d0b96690 DG |
2263 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
2264 | if (ret < 0) { | |
5eb91c98 | 2265 | free(ust_cmd); |
d0b96690 | 2266 | /* Close socket of the application. */ |
76d7553f MD |
2267 | ret = close(sock); |
2268 | if (ret) { | |
2269 | PERROR("close"); | |
2270 | } | |
4063050c | 2271 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 2272 | sock = -1; |
5eb91c98 DG |
2273 | continue; |
2274 | } | |
840cb59c | 2275 | health_code_update(); |
099e26bd | 2276 | |
5eb91c98 | 2277 | ust_cmd->sock = sock; |
34a2494f | 2278 | sock = -1; |
099e26bd | 2279 | |
5eb91c98 DG |
2280 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2281 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2282 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2283 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2284 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2285 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2286 | |
5eb91c98 DG |
2287 | /* |
2288 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2289 | * has been taken! This apps will be part of the *system*. |
5eb91c98 | 2290 | */ |
8bdee6e2 | 2291 | cds_wfcq_enqueue(&ust_cmd_queue.head, &ust_cmd_queue.tail, &ust_cmd->node); |
5eb91c98 DG |
2292 | |
2293 | /* | |
2294 | * Wake the registration queue futex. Implicit memory | |
8bdee6e2 | 2295 | * barrier with the exchange in cds_wfcq_enqueue. |
5eb91c98 DG |
2296 | */ |
2297 | futex_nto1_wake(&ust_cmd_queue.futex); | |
03e43155 MD |
2298 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2299 | ERR("Register apps socket poll error"); | |
2300 | goto error; | |
2301 | } else { | |
2302 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2303 | goto error; | |
5eb91c98 DG |
2304 | } |
2305 | } | |
90014c57 | 2306 | } |
1d4b027a DG |
2307 | } |
2308 | ||
139ac872 | 2309 | exit: |
1d4b027a | 2310 | error: |
0fdd1e2c DG |
2311 | /* Notify that the registration thread is gone */ |
2312 | notify_ust_apps(0); | |
2313 | ||
a4b35e07 | 2314 | if (apps_sock >= 0) { |
76d7553f MD |
2315 | ret = close(apps_sock); |
2316 | if (ret) { | |
2317 | PERROR("close"); | |
2318 | } | |
a4b35e07 | 2319 | } |
46c3f085 | 2320 | if (sock >= 0) { |
76d7553f MD |
2321 | ret = close(sock); |
2322 | if (ret) { | |
2323 | PERROR("close"); | |
2324 | } | |
4063050c | 2325 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2326 | } |
273ea72c | 2327 | unlink(apps_unix_sock_path); |
0fdd1e2c | 2328 | |
76d7553f | 2329 | error_poll_add: |
5eb91c98 | 2330 | lttng_poll_clean(&events); |
76d7553f MD |
2331 | error_listen: |
2332 | error_create_poll: | |
6993eeb3 | 2333 | error_testpoint: |
76d7553f | 2334 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2335 | if (err) { |
2336 | health_error(); | |
2337 | ERR("Health error occurred in %s", __func__); | |
2338 | } | |
8782cc74 | 2339 | health_unregister(health_sessiond); |
5eb91c98 | 2340 | |
1d4b027a DG |
2341 | return NULL; |
2342 | } | |
2343 | ||
8c0faa1d | 2344 | /* |
3bd1e081 | 2345 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2346 | * exec or it will fails. |
8c0faa1d | 2347 | */ |
3bd1e081 | 2348 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2349 | { |
a23ec3a7 | 2350 | int ret, clock_ret; |
ee0b0061 DG |
2351 | struct timespec timeout; |
2352 | ||
a23ec3a7 DG |
2353 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
2354 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 2355 | |
a23ec3a7 DG |
2356 | /* Setup pthread condition */ |
2357 | ret = pthread_condattr_init(&consumer_data->condattr); | |
4a15001e | 2358 | if (ret) { |
a23ec3a7 DG |
2359 | errno = ret; |
2360 | PERROR("pthread_condattr_init consumer data"); | |
2361 | goto error; | |
2362 | } | |
2363 | ||
2364 | /* | |
2365 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2366 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2367 | * for a more details and how we noticed it. | |
2368 | */ | |
2369 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
4a15001e | 2370 | if (ret) { |
a23ec3a7 DG |
2371 | errno = ret; |
2372 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2373 | goto error; |
2374 | } | |
8c0faa1d | 2375 | |
a23ec3a7 | 2376 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
4a15001e | 2377 | if (ret) { |
a23ec3a7 DG |
2378 | errno = ret; |
2379 | PERROR("pthread_cond_init consumer data"); | |
2380 | goto error; | |
2381 | } | |
2382 | ||
2383 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
2384 | consumer_data); | |
4a15001e MD |
2385 | if (ret) { |
2386 | errno = ret; | |
3bd1e081 | 2387 | PERROR("pthread_create consumer"); |
ee0b0061 | 2388 | ret = -1; |
8c0faa1d DG |
2389 | goto error; |
2390 | } | |
2391 | ||
a23ec3a7 DG |
2392 | /* We are about to wait on a pthread condition */ |
2393 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2394 | ||
ee0b0061 | 2395 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
2396 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
2397 | /* | |
2398 | * Set the timeout for the condition timed wait even if the clock gettime | |
2399 | * call fails since we might loop on that call and we want to avoid to | |
2400 | * increment the timeout too many times. | |
2401 | */ | |
2402 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2403 | ||
2404 | /* | |
2405 | * The following loop COULD be skipped in some conditions so this is why we | |
2406 | * set ret to 0 in order to make sure at least one round of the loop is | |
2407 | * done. | |
2408 | */ | |
2409 | ret = 0; | |
2410 | ||
2411 | /* | |
2412 | * Loop until the condition is reached or when a timeout is reached. Note | |
2413 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2414 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2415 | * possible. This loop does not take any chances and works with both of | |
2416 | * them. | |
2417 | */ | |
2418 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2419 | if (clock_ret < 0) { | |
2420 | PERROR("clock_gettime spawn consumer"); | |
2421 | /* Infinite wait for the consumerd thread to be ready */ | |
2422 | ret = pthread_cond_wait(&consumer_data->cond, | |
2423 | &consumer_data->cond_mutex); | |
2424 | } else { | |
2425 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2426 | &consumer_data->cond_mutex, &timeout); | |
2427 | } | |
ee0b0061 | 2428 | } |
8c0faa1d | 2429 | |
a23ec3a7 DG |
2430 | /* Release the pthread condition */ |
2431 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2432 | ||
2433 | if (ret != 0) { | |
2434 | errno = ret; | |
2435 | if (ret == ETIMEDOUT) { | |
4282f9a3 DG |
2436 | int pth_ret; |
2437 | ||
ee0b0061 DG |
2438 | /* |
2439 | * Call has timed out so we kill the kconsumerd_thread and return | |
2440 | * an error. | |
2441 | */ | |
a23ec3a7 DG |
2442 | ERR("Condition timed out. The consumer thread was never ready." |
2443 | " Killing it"); | |
4282f9a3 DG |
2444 | pth_ret = pthread_cancel(consumer_data->thread); |
2445 | if (pth_ret < 0) { | |
3bd1e081 | 2446 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2447 | } |
2448 | } else { | |
a23ec3a7 | 2449 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 | 2450 | } |
4282f9a3 DG |
2451 | /* Caller is expecting a negative value on failure. */ |
2452 | ret = -1; | |
ee0b0061 DG |
2453 | goto error; |
2454 | } | |
2455 | ||
3bd1e081 MD |
2456 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2457 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2458 | ERR("Consumerd did not start"); |
3bd1e081 | 2459 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2460 | goto error; |
2461 | } | |
3bd1e081 | 2462 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2463 | |
8c0faa1d DG |
2464 | return 0; |
2465 | ||
2466 | error: | |
2467 | return ret; | |
2468 | } | |
2469 | ||
d9800920 | 2470 | /* |
3bd1e081 | 2471 | * Join consumer thread |
d9800920 | 2472 | */ |
3bd1e081 | 2473 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2474 | { |
2475 | void *status; | |
cf3af59e | 2476 | |
e8209f6b DG |
2477 | /* Consumer pid must be a real one. */ |
2478 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2479 | int ret; |
3bd1e081 | 2480 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2481 | if (ret) { |
4a15001e | 2482 | PERROR("Error killing consumer daemon"); |
cf3af59e MD |
2483 | return ret; |
2484 | } | |
3bd1e081 | 2485 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2486 | } else { |
2487 | return 0; | |
2488 | } | |
2489 | } | |
2490 | ||
8c0faa1d | 2491 | /* |
3bd1e081 | 2492 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2493 | * |
d063d709 | 2494 | * Return pid if successful else -1. |
8c0faa1d | 2495 | */ |
3bd1e081 | 2496 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2497 | { |
2498 | int ret; | |
2499 | pid_t pid; | |
94c55f17 | 2500 | const char *consumer_to_use; |
53086306 | 2501 | const char *verbosity; |
94c55f17 | 2502 | struct stat st; |
8c0faa1d | 2503 | |
3bd1e081 | 2504 | DBG("Spawning consumerd"); |
c49dc785 | 2505 | |
8c0faa1d DG |
2506 | pid = fork(); |
2507 | if (pid == 0) { | |
2508 | /* | |
3bd1e081 | 2509 | * Exec consumerd. |
8c0faa1d | 2510 | */ |
daee5345 | 2511 | if (opt_verbose_consumer) { |
53086306 | 2512 | verbosity = "--verbose"; |
4421f712 | 2513 | } else if (lttng_opt_quiet) { |
53086306 | 2514 | verbosity = "--quiet"; |
4421f712 DG |
2515 | } else { |
2516 | verbosity = ""; | |
53086306 | 2517 | } |
4421f712 | 2518 | |
3bd1e081 MD |
2519 | switch (consumer_data->type) { |
2520 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2521 | /* |
c7704d57 DG |
2522 | * Find out which consumerd to execute. We will first try the |
2523 | * 64-bit path, then the sessiond's installation directory, and | |
2524 | * fallback on the 32-bit one, | |
94c55f17 | 2525 | */ |
63a799e8 AM |
2526 | DBG3("Looking for a kernel consumer at these locations:"); |
2527 | DBG3(" 1) %s", consumerd64_bin); | |
2528 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
2529 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 2530 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 2531 | DBG3("Found location #1"); |
94c55f17 | 2532 | consumer_to_use = consumerd64_bin; |
94c55f17 | 2533 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 2534 | DBG3("Found location #2"); |
94c55f17 | 2535 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 2536 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 2537 | DBG3("Found location #3"); |
eb1e0bd4 | 2538 | consumer_to_use = consumerd32_bin; |
94c55f17 | 2539 | } else { |
63a799e8 | 2540 | DBG("Could not find any valid consumerd executable"); |
4282f9a3 | 2541 | ret = -EINVAL; |
94c55f17 AM |
2542 | break; |
2543 | } | |
2544 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
4282f9a3 | 2545 | ret = execl(consumer_to_use, |
94c55f17 AM |
2546 | "lttng-consumerd", verbosity, "-k", |
2547 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2548 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2549 | "--group", tracing_group_name, |
94c55f17 | 2550 | NULL); |
3bd1e081 | 2551 | break; |
7753dea8 MD |
2552 | case LTTNG_CONSUMER64_UST: |
2553 | { | |
b1e0b6b6 | 2554 | char *tmpnew = NULL; |
8f4905da MD |
2555 | |
2556 | if (consumerd64_libdir[0] != '\0') { | |
2557 | char *tmp; | |
2558 | size_t tmplen; | |
2559 | ||
e8fa9fb0 | 2560 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2561 | if (!tmp) { |
2562 | tmp = ""; | |
2563 | } | |
2564 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2565 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
2566 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2567 | if (!tmpnew) { | |
2568 | ret = -ENOMEM; | |
2569 | goto error; | |
2570 | } | |
2571 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2572 | strcat(tmpnew, consumerd64_libdir); | |
2573 | if (tmp[0] != '\0') { | |
2574 | strcat(tmpnew, ":"); | |
2575 | strcat(tmpnew, tmp); | |
2576 | } | |
2577 | ret = putenv(tmpnew); | |
2578 | if (ret) { | |
2579 | ret = -errno; | |
c6f76da9 | 2580 | free(tmpnew); |
8f4905da MD |
2581 | goto error; |
2582 | } | |
2583 | } | |
94c55f17 | 2584 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 2585 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2586 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2587 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2588 | "--group", tracing_group_name, |
7753dea8 | 2589 | NULL); |
8f4905da MD |
2590 | if (consumerd64_libdir[0] != '\0') { |
2591 | free(tmpnew); | |
2592 | } | |
3bd1e081 | 2593 | break; |
7753dea8 MD |
2594 | } |
2595 | case LTTNG_CONSUMER32_UST: | |
2596 | { | |
937dde8e | 2597 | char *tmpnew = NULL; |
8f4905da MD |
2598 | |
2599 | if (consumerd32_libdir[0] != '\0') { | |
2600 | char *tmp; | |
2601 | size_t tmplen; | |
2602 | ||
e8fa9fb0 | 2603 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2604 | if (!tmp) { |
2605 | tmp = ""; | |
2606 | } | |
2607 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2608 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2609 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2610 | if (!tmpnew) { | |
2611 | ret = -ENOMEM; | |
2612 | goto error; | |
2613 | } | |
2614 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2615 | strcat(tmpnew, consumerd32_libdir); | |
2616 | if (tmp[0] != '\0') { | |
2617 | strcat(tmpnew, ":"); | |
2618 | strcat(tmpnew, tmp); | |
2619 | } | |
2620 | ret = putenv(tmpnew); | |
2621 | if (ret) { | |
2622 | ret = -errno; | |
c6f76da9 | 2623 | free(tmpnew); |
8f4905da MD |
2624 | goto error; |
2625 | } | |
2626 | } | |
94c55f17 | 2627 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 2628 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2629 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2630 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2631 | "--group", tracing_group_name, |
7753dea8 | 2632 | NULL); |
8f4905da MD |
2633 | if (consumerd32_libdir[0] != '\0') { |
2634 | free(tmpnew); | |
2635 | } | |
7753dea8 MD |
2636 | break; |
2637 | } | |
3bd1e081 | 2638 | default: |
76d7553f | 2639 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2640 | exit(EXIT_FAILURE); |
2641 | } | |
8c0faa1d | 2642 | if (errno != 0) { |
4282f9a3 | 2643 | PERROR("Consumer execl()"); |
8c0faa1d | 2644 | } |
4282f9a3 | 2645 | /* Reaching this point, we got a failure on our execl(). */ |
8c0faa1d DG |
2646 | exit(EXIT_FAILURE); |
2647 | } else if (pid > 0) { | |
2648 | ret = pid; | |
8c0faa1d | 2649 | } else { |
76d7553f | 2650 | PERROR("start consumer fork"); |
8c0faa1d | 2651 | ret = -errno; |
8c0faa1d | 2652 | } |
8f4905da | 2653 | error: |
8c0faa1d DG |
2654 | return ret; |
2655 | } | |
2656 | ||
693bd40b | 2657 | /* |
3bd1e081 | 2658 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2659 | */ |
3bd1e081 | 2660 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2661 | { |
c617c0c6 | 2662 | int ret; |
edb8b045 DG |
2663 | |
2664 | /* | |
2665 | * Set the listen() state on the socket since there is a possible race | |
2666 | * between the exec() of the consumer daemon and this call if place in the | |
2667 | * consumer thread. See bug #366 for more details. | |
2668 | */ | |
2669 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2670 | if (ret < 0) { | |
2671 | goto error; | |
2672 | } | |
693bd40b | 2673 | |
3bd1e081 MD |
2674 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2675 | if (consumer_data->pid != 0) { | |
2676 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2677 | goto end; |
2678 | } | |
693bd40b | 2679 | |
3bd1e081 | 2680 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2681 | if (ret < 0) { |
3bd1e081 MD |
2682 | ERR("Spawning consumerd failed"); |
2683 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2684 | goto error; |
693bd40b | 2685 | } |
c49dc785 | 2686 | |
3bd1e081 MD |
2687 | /* Setting up the consumer_data pid */ |
2688 | consumer_data->pid = ret; | |
48842b30 | 2689 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2690 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2691 | |
3bd1e081 MD |
2692 | DBG2("Spawning consumer control thread"); |
2693 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2694 | if (ret < 0) { |
3bd1e081 | 2695 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2696 | goto error; |
2697 | } | |
2698 | ||
c49dc785 | 2699 | end: |
693bd40b DG |
2700 | return 0; |
2701 | ||
2702 | error: | |
331744e3 | 2703 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2704 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2705 | int err; |
2706 | ||
edb8b045 DG |
2707 | err = close(consumer_data->err_sock); |
2708 | if (err < 0) { | |
2709 | PERROR("close consumer data error socket"); | |
2710 | } | |
2711 | } | |
693bd40b DG |
2712 | return ret; |
2713 | } | |
2714 | ||
b73401da | 2715 | /* |
096102bd | 2716 | * Setup necessary data for kernel tracer action. |
b73401da | 2717 | */ |
096102bd | 2718 | static int init_kernel_tracer(void) |
b73401da DG |
2719 | { |
2720 | int ret; | |
b73401da | 2721 | |
096102bd DG |
2722 | /* Modprobe lttng kernel modules */ |
2723 | ret = modprobe_lttng_control(); | |
b73401da | 2724 | if (ret < 0) { |
b73401da DG |
2725 | goto error; |
2726 | } | |
2727 | ||
096102bd DG |
2728 | /* Open debugfs lttng */ |
2729 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2730 | if (kernel_tracer_fd < 0) { | |
2731 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
2732 | ret = -1; |
2733 | goto error_open; | |
54d01ffb DG |
2734 | } |
2735 | ||
2f77fc4b DG |
2736 | /* Validate kernel version */ |
2737 | ret = kernel_validate_version(kernel_tracer_fd); | |
2738 | if (ret < 0) { | |
2739 | goto error_version; | |
b551a063 | 2740 | } |
54d01ffb | 2741 | |
2f77fc4b DG |
2742 | ret = modprobe_lttng_data(); |
2743 | if (ret < 0) { | |
2744 | goto error_modules; | |
54d01ffb DG |
2745 | } |
2746 | ||
2f77fc4b DG |
2747 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2748 | return 0; | |
2749 | ||
2750 | error_version: | |
2751 | modprobe_remove_lttng_control(); | |
2752 | ret = close(kernel_tracer_fd); | |
2753 | if (ret) { | |
2754 | PERROR("close"); | |
b551a063 | 2755 | } |
2f77fc4b | 2756 | kernel_tracer_fd = -1; |
f73fabfd | 2757 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2758 | |
2f77fc4b DG |
2759 | error_modules: |
2760 | ret = close(kernel_tracer_fd); | |
2761 | if (ret) { | |
2762 | PERROR("close"); | |
b551a063 | 2763 | } |
54d01ffb | 2764 | |
2f77fc4b DG |
2765 | error_open: |
2766 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2767 | |
2768 | error: | |
2f77fc4b DG |
2769 | WARN("No kernel tracer available"); |
2770 | kernel_tracer_fd = -1; | |
2771 | if (!is_root) { | |
f73fabfd | 2772 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2773 | } else { |
f73fabfd | 2774 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2775 | } |
54d01ffb DG |
2776 | } |
2777 | ||
2f77fc4b | 2778 | |
54d01ffb | 2779 | /* |
2f77fc4b DG |
2780 | * Copy consumer output from the tracing session to the domain session. The |
2781 | * function also applies the right modification on a per domain basis for the | |
2782 | * trace files destination directory. | |
36b588ed MD |
2783 | * |
2784 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2785 | */ |
2f77fc4b | 2786 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2787 | { |
2788 | int ret; | |
2f77fc4b DG |
2789 | const char *dir_name; |
2790 | struct consumer_output *consumer; | |
2791 | ||
2792 | assert(session); | |
2793 | assert(session->consumer); | |
54d01ffb | 2794 | |
b551a063 DG |
2795 | switch (domain) { |
2796 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2797 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2798 | /* |
2799 | * XXX: We should audit the session creation and what this function | |
2800 | * does "extra" in order to avoid a destroy since this function is used | |
2801 | * in the domain session creation (kernel and ust) only. Same for UST | |
2802 | * domain. | |
2803 | */ | |
2804 | if (session->kernel_session->consumer) { | |
6addfa37 | 2805 | consumer_output_put(session->kernel_session->consumer); |
09a90bcd | 2806 | } |
2f77fc4b DG |
2807 | session->kernel_session->consumer = |
2808 | consumer_copy_output(session->consumer); | |
2809 | /* Ease our life a bit for the next part */ | |
2810 | consumer = session->kernel_session->consumer; | |
2811 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2812 | break; |
f20baf8e | 2813 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2814 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2815 | case LTTNG_DOMAIN_PYTHON: |
b551a063 | 2816 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2817 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd | 2818 | if (session->ust_session->consumer) { |
6addfa37 | 2819 | consumer_output_put(session->ust_session->consumer); |
09a90bcd | 2820 | } |
2f77fc4b DG |
2821 | session->ust_session->consumer = |
2822 | consumer_copy_output(session->consumer); | |
2823 | /* Ease our life a bit for the next part */ | |
2824 | consumer = session->ust_session->consumer; | |
2825 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2826 | break; |
2827 | default: | |
f73fabfd | 2828 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2829 | goto error; |
2830 | } | |
2831 | ||
2f77fc4b | 2832 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2833 | strncat(consumer->subdir, dir_name, |
2834 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2835 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2836 | ||
f73fabfd | 2837 | ret = LTTNG_OK; |
54d01ffb DG |
2838 | |
2839 | error: | |
2840 | return ret; | |
2841 | } | |
2842 | ||
00e2e675 | 2843 | /* |
2f77fc4b | 2844 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2845 | * |
2846 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2847 | */ |
2f77fc4b DG |
2848 | static int create_ust_session(struct ltt_session *session, |
2849 | struct lttng_domain *domain) | |
00e2e675 DG |
2850 | { |
2851 | int ret; | |
2f77fc4b | 2852 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2853 | |
a4b92340 | 2854 | assert(session); |
2f77fc4b DG |
2855 | assert(domain); |
2856 | assert(session->consumer); | |
a4b92340 | 2857 | |
2f77fc4b | 2858 | switch (domain->type) { |
f20baf8e | 2859 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2860 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2861 | case LTTNG_DOMAIN_PYTHON: |
2f77fc4b DG |
2862 | case LTTNG_DOMAIN_UST: |
2863 | break; | |
2864 | default: | |
2865 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2866 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2867 | goto error; |
2868 | } | |
2869 | ||
2f77fc4b DG |
2870 | DBG("Creating UST session"); |
2871 | ||
dec56f6c | 2872 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2873 | if (lus == NULL) { |
f73fabfd | 2874 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2875 | goto error; |
2876 | } | |
2877 | ||
2f77fc4b DG |
2878 | lus->uid = session->uid; |
2879 | lus->gid = session->gid; | |
2bba9e53 | 2880 | lus->output_traces = session->output_traces; |
27babd3a | 2881 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2882 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2883 | session->ust_session = lus; |
d7ba1388 | 2884 | if (session->shm_path[0]) { |
3d071855 MD |
2885 | strncpy(lus->root_shm_path, session->shm_path, |
2886 | sizeof(lus->root_shm_path)); | |
2887 | lus->root_shm_path[sizeof(lus->root_shm_path) - 1] = '\0'; | |
d7ba1388 MD |
2888 | strncpy(lus->shm_path, session->shm_path, |
2889 | sizeof(lus->shm_path)); | |
2890 | lus->shm_path[sizeof(lus->shm_path) - 1] = '\0'; | |
2891 | strncat(lus->shm_path, "/ust", | |
2892 | sizeof(lus->shm_path) - strlen(lus->shm_path) - 1); | |
2893 | } | |
2f77fc4b DG |
2894 | /* Copy session output to the newly created UST session */ |
2895 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2896 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2897 | goto error; |
2898 | } | |
2899 | ||
f73fabfd | 2900 | return LTTNG_OK; |
00e2e675 DG |
2901 | |
2902 | error: | |
2f77fc4b DG |
2903 | free(lus); |
2904 | session->ust_session = NULL; | |
00e2e675 DG |
2905 | return ret; |
2906 | } | |
2907 | ||
2908 | /* | |
2f77fc4b | 2909 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2910 | */ |
2f77fc4b | 2911 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2912 | { |
2913 | int ret; | |
a4b92340 | 2914 | |
2f77fc4b | 2915 | DBG("Creating kernel session"); |
00e2e675 | 2916 | |
2f77fc4b DG |
2917 | ret = kernel_create_session(session, kernel_tracer_fd); |
2918 | if (ret < 0) { | |
f73fabfd | 2919 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2920 | goto error; |
2921 | } | |
2922 | ||
2f77fc4b DG |
2923 | /* Code flow safety */ |
2924 | assert(session->kernel_session); | |
2925 | ||
2926 | /* Copy session output to the newly created Kernel session */ | |
2927 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2928 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2929 | goto error; |
2930 | } | |
2931 | ||
2f77fc4b DG |
2932 | /* Create directory(ies) on local filesystem. */ |
2933 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2934 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2935 | ret = run_as_mkdir_recursive( | |
2936 | session->kernel_session->consumer->dst.trace_path, | |
2937 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2938 | if (ret < 0) { | |
df5b86c8 | 2939 | if (errno != EEXIST) { |
2f77fc4b | 2940 | ERR("Trace directory creation error"); |
00e2e675 DG |
2941 | goto error; |
2942 | } | |
00e2e675 | 2943 | } |
2f77fc4b | 2944 | } |
00e2e675 | 2945 | |
2f77fc4b DG |
2946 | session->kernel_session->uid = session->uid; |
2947 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2948 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2949 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2950 | |
f73fabfd | 2951 | return LTTNG_OK; |
00e2e675 | 2952 | |
2f77fc4b DG |
2953 | error: |
2954 | trace_kernel_destroy_session(session->kernel_session); | |
2955 | session->kernel_session = NULL; | |
2956 | return ret; | |
2957 | } | |
00e2e675 | 2958 | |
2f77fc4b DG |
2959 | /* |
2960 | * Count number of session permitted by uid/gid. | |
2961 | */ | |
2962 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2963 | { | |
2964 | unsigned int i = 0; | |
2965 | struct ltt_session *session; | |
07424f16 | 2966 | |
2f77fc4b DG |
2967 | DBG("Counting number of available session for UID %d GID %d", |
2968 | uid, gid); | |
2969 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2970 | /* |
2f77fc4b | 2971 | * Only list the sessions the user can control. |
00e2e675 | 2972 | */ |
2f77fc4b DG |
2973 | if (!session_access_ok(session, uid, gid)) { |
2974 | continue; | |
2975 | } | |
2976 | i++; | |
a4b92340 | 2977 | } |
2f77fc4b | 2978 | return i; |
00e2e675 DG |
2979 | } |
2980 | ||
54d01ffb DG |
2981 | /* |
2982 | * Process the command requested by the lttng client within the command | |
2983 | * context structure. This function make sure that the return structure (llm) | |
2984 | * is set and ready for transmission before returning. | |
2985 | * | |
2986 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2987 | * |
2988 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2989 | * |
2990 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2991 | */ |
53a80697 MD |
2992 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2993 | int *sock_error) | |
54d01ffb | 2994 | { |
f73fabfd | 2995 | int ret = LTTNG_OK; |
44d3bd01 | 2996 | int need_tracing_session = 1; |
2e09ba09 | 2997 | int need_domain; |
54d01ffb DG |
2998 | |
2999 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
3000 | ||
3745d315 MD |
3001 | assert(!rcu_read_ongoing()); |
3002 | ||
53a80697 MD |
3003 | *sock_error = 0; |
3004 | ||
2e09ba09 MD |
3005 | switch (cmd_ctx->lsm->cmd_type) { |
3006 | case LTTNG_CREATE_SESSION: | |
27babd3a | 3007 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 3008 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
3009 | case LTTNG_DESTROY_SESSION: |
3010 | case LTTNG_LIST_SESSIONS: | |
3011 | case LTTNG_LIST_DOMAINS: | |
3012 | case LTTNG_START_TRACE: | |
3013 | case LTTNG_STOP_TRACE: | |
6d805429 | 3014 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
3015 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3016 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3017 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3018 | case LTTNG_SNAPSHOT_RECORD: | |
fb198a11 | 3019 | case LTTNG_SAVE_SESSION: |
d7ba1388 | 3020 | case LTTNG_SET_SESSION_SHM_PATH: |
2e09ba09 | 3021 | need_domain = 0; |
3aace903 | 3022 | break; |
2e09ba09 MD |
3023 | default: |
3024 | need_domain = 1; | |
3025 | } | |
3026 | ||
3027 | if (opt_no_kernel && need_domain | |
3028 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 3029 | if (!is_root) { |
f73fabfd | 3030 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 3031 | } else { |
f73fabfd | 3032 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 3033 | } |
4fba7219 DG |
3034 | goto error; |
3035 | } | |
3036 | ||
8d3113b2 DG |
3037 | /* Deny register consumer if we already have a spawned consumer. */ |
3038 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
3039 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
3040 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 3041 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 3042 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
3043 | goto error; |
3044 | } | |
3045 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
3046 | } | |
3047 | ||
54d01ffb DG |
3048 | /* |
3049 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 3050 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
3051 | * command. |
3052 | */ | |
3053 | switch(cmd_ctx->lsm->cmd_type) { | |
3054 | case LTTNG_LIST_SESSIONS: | |
3055 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 3056 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
3057 | case LTTNG_LIST_DOMAINS: |
3058 | case LTTNG_LIST_CHANNELS: | |
3059 | case LTTNG_LIST_EVENTS: | |
834978fd | 3060 | case LTTNG_LIST_SYSCALLS: |
a5dfbb9d | 3061 | case LTTNG_LIST_TRACKER_PIDS: |
54d01ffb DG |
3062 | break; |
3063 | default: | |
3064 | /* Setup lttng message with no payload */ | |
3065 | ret = setup_lttng_msg(cmd_ctx, 0); | |
3066 | if (ret < 0) { | |
3067 | /* This label does not try to unlock the session */ | |
3068 | goto init_setup_error; | |
3069 | } | |
3070 | } | |
3071 | ||
3072 | /* Commands that DO NOT need a session. */ | |
3073 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 3074 | case LTTNG_CREATE_SESSION: |
27babd3a | 3075 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 3076 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 | 3077 | case LTTNG_CALIBRATE: |
54d01ffb DG |
3078 | case LTTNG_LIST_SESSIONS: |
3079 | case LTTNG_LIST_TRACEPOINTS: | |
834978fd | 3080 | case LTTNG_LIST_SYSCALLS: |
f37d259d | 3081 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
fb198a11 | 3082 | case LTTNG_SAVE_SESSION: |
44d3bd01 | 3083 | need_tracing_session = 0; |
54d01ffb DG |
3084 | break; |
3085 | default: | |
3086 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
3087 | /* |
3088 | * We keep the session list lock across _all_ commands | |
3089 | * for now, because the per-session lock does not | |
3090 | * handle teardown properly. | |
3091 | */ | |
74babd95 | 3092 | session_lock_list(); |
54d01ffb DG |
3093 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
3094 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 3095 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
3096 | goto error; |
3097 | } else { | |
3098 | /* Acquire lock for the session */ | |
3099 | session_lock(cmd_ctx->session); | |
3100 | } | |
3101 | break; | |
3102 | } | |
b389abbe | 3103 | |
5f3ecf22 DG |
3104 | /* |
3105 | * Commands that need a valid session but should NOT create one if none | |
3106 | * exists. Instead of creating one and destroying it when the command is | |
3107 | * handled, process that right before so we save some round trip in useless | |
3108 | * code path. | |
3109 | */ | |
3110 | switch (cmd_ctx->lsm->cmd_type) { | |
3111 | case LTTNG_DISABLE_CHANNEL: | |
3112 | case LTTNG_DISABLE_EVENT: | |
5f3ecf22 DG |
3113 | switch (cmd_ctx->lsm->domain.type) { |
3114 | case LTTNG_DOMAIN_KERNEL: | |
3115 | if (!cmd_ctx->session->kernel_session) { | |
3116 | ret = LTTNG_ERR_NO_CHANNEL; | |
3117 | goto error; | |
3118 | } | |
3119 | break; | |
3120 | case LTTNG_DOMAIN_JUL: | |
5cdb6027 | 3121 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3122 | case LTTNG_DOMAIN_PYTHON: |
5f3ecf22 DG |
3123 | case LTTNG_DOMAIN_UST: |
3124 | if (!cmd_ctx->session->ust_session) { | |
3125 | ret = LTTNG_ERR_NO_CHANNEL; | |
3126 | goto error; | |
3127 | } | |
3128 | break; | |
3129 | default: | |
3130 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3131 | goto error; | |
3132 | } | |
3133 | default: | |
3134 | break; | |
3135 | } | |
3136 | ||
2e09ba09 MD |
3137 | if (!need_domain) { |
3138 | goto skip_domain; | |
3139 | } | |
a4b92340 | 3140 | |
54d01ffb DG |
3141 | /* |
3142 | * Check domain type for specific "pre-action". | |
3143 | */ | |
3144 | switch (cmd_ctx->lsm->domain.type) { | |
3145 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 3146 | if (!is_root) { |
f73fabfd | 3147 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
3148 | goto error; |
3149 | } | |
3150 | ||
54d01ffb | 3151 | /* Kernel tracer check */ |
a4b35e07 | 3152 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3153 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3154 | ret = init_kernel_tracer(); |
3155 | if (ret != 0) { | |
54d01ffb DG |
3156 | goto error; |
3157 | } | |
3158 | } | |
5eb91c98 | 3159 | |
5c827ce0 DG |
3160 | /* Consumer is in an ERROR state. Report back to client */ |
3161 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3162 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3163 | goto error; |
3164 | } | |
3165 | ||
54d01ffb | 3166 | /* Need a session for kernel command */ |
44d3bd01 | 3167 | if (need_tracing_session) { |
54d01ffb | 3168 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3169 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3170 | if (ret < 0) { |
f73fabfd | 3171 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
3172 | goto error; |
3173 | } | |
b389abbe | 3174 | } |
7d29a247 | 3175 | |
54d01ffb | 3176 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3177 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3178 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 3179 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3180 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3181 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3182 | if (ret < 0) { |
f73fabfd | 3183 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 3184 | goto error; |
950131af | 3185 | } |
5c827ce0 | 3186 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
3187 | } else { |
3188 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3189 | } |
173af62f | 3190 | |
a4b92340 DG |
3191 | /* |
3192 | * The consumer was just spawned so we need to add the socket to | |
3193 | * the consumer output of the session if exist. | |
3194 | */ | |
3195 | ret = consumer_create_socket(&kconsumer_data, | |
3196 | cmd_ctx->session->kernel_session->consumer); | |
3197 | if (ret < 0) { | |
3198 | goto error; | |
173af62f | 3199 | } |
0d0c377a | 3200 | } |
5c827ce0 | 3201 | |
54d01ffb | 3202 | break; |
b9dfb167 | 3203 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3204 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3205 | case LTTNG_DOMAIN_PYTHON: |
2bdd86d4 | 3206 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3207 | { |
b51ec5b4 MD |
3208 | if (!ust_app_supported()) { |
3209 | ret = LTTNG_ERR_NO_UST; | |
3210 | goto error; | |
3211 | } | |
5c827ce0 DG |
3212 | /* Consumer is in an ERROR state. Report back to client */ |
3213 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3214 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3215 | goto error; |
3216 | } | |
3217 | ||
44d3bd01 | 3218 | if (need_tracing_session) { |
a4b92340 | 3219 | /* Create UST session if none exist. */ |
f6a9efaa | 3220 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3221 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3222 | &cmd_ctx->lsm->domain); |
f73fabfd | 3223 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
3224 | goto error; |
3225 | } | |
3226 | } | |
00e2e675 | 3227 | |
7753dea8 MD |
3228 | /* Start the UST consumer daemons */ |
3229 | /* 64-bit */ | |
3230 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 3231 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 3232 | ustconsumer64_data.pid == 0 && |
785d2d0d | 3233 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3234 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3235 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3236 | if (ret < 0) { |
f73fabfd | 3237 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 3238 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
3239 | goto error; |
3240 | } | |
48842b30 | 3241 | |
173af62f | 3242 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 3243 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3244 | } else { |
7753dea8 MD |
3245 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3246 | } | |
173af62f DG |
3247 | |
3248 | /* | |
3249 | * Setup socket for consumer 64 bit. No need for atomic access | |
3250 | * since it was set above and can ONLY be set in this thread. | |
3251 | */ | |
a4b92340 DG |
3252 | ret = consumer_create_socket(&ustconsumer64_data, |
3253 | cmd_ctx->session->ust_session->consumer); | |
3254 | if (ret < 0) { | |
3255 | goto error; | |
173af62f DG |
3256 | } |
3257 | ||
7753dea8 | 3258 | /* 32-bit */ |
385b881b | 3259 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); |
fc7a59ce | 3260 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 3261 | ustconsumer32_data.pid == 0 && |
785d2d0d | 3262 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3263 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
3264 | ret = start_consumerd(&ustconsumer32_data); | |
3265 | if (ret < 0) { | |
f73fabfd | 3266 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 3267 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
3268 | goto error; |
3269 | } | |
5c827ce0 | 3270 | |
173af62f | 3271 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 3272 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3273 | } else { |
3274 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3275 | } |
173af62f DG |
3276 | |
3277 | /* | |
3278 | * Setup socket for consumer 64 bit. No need for atomic access | |
3279 | * since it was set above and can ONLY be set in this thread. | |
3280 | */ | |
a4b92340 DG |
3281 | ret = consumer_create_socket(&ustconsumer32_data, |
3282 | cmd_ctx->session->ust_session->consumer); | |
3283 | if (ret < 0) { | |
3284 | goto error; | |
173af62f | 3285 | } |
44d3bd01 DG |
3286 | } |
3287 | break; | |
48842b30 | 3288 | } |
54d01ffb | 3289 | default: |
54d01ffb DG |
3290 | break; |
3291 | } | |
2e09ba09 | 3292 | skip_domain: |
33a2b854 | 3293 | |
5c827ce0 DG |
3294 | /* Validate consumer daemon state when start/stop trace command */ |
3295 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3296 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3297 | switch (cmd_ctx->lsm->domain.type) { | |
b9dfb167 | 3298 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3299 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3300 | case LTTNG_DOMAIN_PYTHON: |
5c827ce0 DG |
3301 | case LTTNG_DOMAIN_UST: |
3302 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3303 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3304 | goto error; |
3305 | } | |
3306 | break; | |
3307 | case LTTNG_DOMAIN_KERNEL: | |
3308 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3309 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3310 | goto error; |
3311 | } | |
3312 | break; | |
3313 | } | |
3314 | } | |
3315 | ||
8e0af1b4 MD |
3316 | /* |
3317 | * Check that the UID or GID match that of the tracing session. | |
3318 | * The root user can interact with all sessions. | |
3319 | */ | |
3320 | if (need_tracing_session) { | |
3321 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3322 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3323 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 3324 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
3325 | goto error; |
3326 | } | |
3327 | } | |
3328 | ||
ffe60014 DG |
3329 | /* |
3330 | * Send relayd information to consumer as soon as we have a domain and a | |
3331 | * session defined. | |
3332 | */ | |
3333 | if (cmd_ctx->session && need_domain) { | |
3334 | /* | |
3335 | * Setup relayd if not done yet. If the relayd information was already | |
3336 | * sent to the consumer, this call will gracefully return. | |
3337 | */ | |
3338 | ret = cmd_setup_relayd(cmd_ctx->session); | |
3339 | if (ret != LTTNG_OK) { | |
3340 | goto error; | |
3341 | } | |
3342 | } | |
3343 | ||
54d01ffb DG |
3344 | /* Process by command type */ |
3345 | switch (cmd_ctx->lsm->cmd_type) { | |
3346 | case LTTNG_ADD_CONTEXT: | |
3347 | { | |
3348 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3349 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 3350 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
3351 | break; |
3352 | } | |
3353 | case LTTNG_DISABLE_CHANNEL: | |
3354 | { | |
3355 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3356 | cmd_ctx->lsm->u.disable.channel_name); | |
3357 | break; | |
3358 | } | |
3359 | case LTTNG_DISABLE_EVENT: | |
3360 | { | |
47b7e2f9 JG |
3361 | |
3362 | /* | |
3363 | * FIXME: handle filter; for now we just receive the filter's | |
3364 | * bytecode along with the filter expression which are sent by | |
3365 | * liblttng-ctl and discard them. | |
3366 | * | |
3367 | * This fixes an issue where the client may block while sending | |
3368 | * the filter payload and encounter an error because the session | |
3369 | * daemon closes the socket without ever handling this data. | |
3370 | */ | |
3371 | size_t count = cmd_ctx->lsm->u.disable.expression_len + | |
3372 | cmd_ctx->lsm->u.disable.bytecode_len; | |
3373 | ||
3374 | if (count) { | |
3375 | char data[LTTNG_FILTER_MAX_LEN]; | |
3376 | ||
3377 | DBG("Discarding disable event command payload of size %zu", count); | |
3378 | while (count) { | |
3379 | ret = lttcomm_recv_unix_sock(sock, data, | |
3380 | count > sizeof(data) ? sizeof(data) : count); | |
3381 | if (ret < 0) { | |
3382 | goto error; | |
3383 | } | |
3384 | ||
3385 | count -= (size_t) ret; | |
3386 | } | |
3387 | } | |
6e911cad | 3388 | /* FIXME: passing packed structure to non-packed pointer */ |
54d01ffb DG |
3389 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3390 | cmd_ctx->lsm->u.disable.channel_name, | |
6e911cad | 3391 | &cmd_ctx->lsm->u.disable.event); |
33a2b854 DG |
3392 | break; |
3393 | } | |
54d01ffb DG |
3394 | case LTTNG_ENABLE_CHANNEL: |
3395 | { | |
7972aab2 | 3396 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 3397 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
3398 | break; |
3399 | } | |
ccf10263 MD |
3400 | case LTTNG_TRACK_PID: |
3401 | { | |
3402 | ret = cmd_track_pid(cmd_ctx->session, | |
3403 | cmd_ctx->lsm->domain.type, | |
3404 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3405 | break; | |
3406 | } | |
3407 | case LTTNG_UNTRACK_PID: | |
3408 | { | |
3409 | ret = cmd_untrack_pid(cmd_ctx->session, | |
3410 | cmd_ctx->lsm->domain.type, | |
3411 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3412 | break; | |
3413 | } | |
54d01ffb DG |
3414 | case LTTNG_ENABLE_EVENT: |
3415 | { | |
882ef835 JI |
3416 | struct lttng_event_exclusion *exclusion = NULL; |
3417 | struct lttng_filter_bytecode *bytecode = NULL; | |
6b453b5e | 3418 | char *filter_expression = NULL; |
882ef835 | 3419 | |
67676bd8 DG |
3420 | /* Handle exclusion events and receive it from the client. */ |
3421 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3422 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3423 | ||
3424 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3425 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3426 | if (!exclusion) { | |
3427 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3428 | goto error; | |
882ef835 | 3429 | } |
882ef835 | 3430 | |
67676bd8 DG |
3431 | DBG("Receiving var len exclusion event list from client ..."); |
3432 | exclusion->count = count; | |
3433 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3434 | count * LTTNG_SYMBOL_NAME_LEN); | |
3435 | if (ret <= 0) { | |
3436 | DBG("Nothing recv() from client var len data... continuing"); | |
3437 | *sock_error = 1; | |
3438 | free(exclusion); | |
3439 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3440 | goto error; | |
3441 | } | |
3442 | } | |
3443 | ||
6b453b5e JG |
3444 | /* Get filter expression from client. */ |
3445 | if (cmd_ctx->lsm->u.enable.expression_len > 0) { | |
3446 | size_t expression_len = | |
3447 | cmd_ctx->lsm->u.enable.expression_len; | |
3448 | ||
3449 | if (expression_len > LTTNG_FILTER_MAX_LEN) { | |
3450 | ret = LTTNG_ERR_FILTER_INVAL; | |
3451 | free(exclusion); | |
3452 | goto error; | |
3453 | } | |
3454 | ||
3455 | filter_expression = zmalloc(expression_len); | |
3456 | if (!filter_expression) { | |
3457 | free(exclusion); | |
3458 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3459 | goto error; | |
3460 | } | |
3461 | ||
3462 | /* Receive var. len. data */ | |
3463 | DBG("Receiving var len filter's expression from client ..."); | |
3464 | ret = lttcomm_recv_unix_sock(sock, filter_expression, | |
3465 | expression_len); | |
3466 | if (ret <= 0) { | |
3467 | DBG("Nothing recv() from client car len data... continuing"); | |
3468 | *sock_error = 1; | |
3469 | free(filter_expression); | |
3470 | free(exclusion); | |
3471 | ret = LTTNG_ERR_FILTER_INVAL; | |
3472 | goto error; | |
3473 | } | |
3474 | } | |
3475 | ||
67676bd8 DG |
3476 | /* Handle filter and get bytecode from client. */ |
3477 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3478 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3479 | ||
3480 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3481 | ret = LTTNG_ERR_FILTER_INVAL; | |
49d21f93 | 3482 | free(filter_expression); |
67676bd8 DG |
3483 | free(exclusion); |
3484 | goto error; | |
3485 | } | |
3486 | ||
3487 | bytecode = zmalloc(bytecode_len); | |
3488 | if (!bytecode) { | |
49d21f93 | 3489 | free(filter_expression); |
67676bd8 DG |
3490 | free(exclusion); |
3491 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3492 | goto error; | |
882ef835 JI |
3493 | } |
3494 | ||
67676bd8 DG |
3495 | /* Receive var. len. data */ |
3496 | DBG("Receiving var len filter's bytecode from client ..."); | |
3497 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3498 | if (ret <= 0) { | |
3499 | DBG("Nothing recv() from client car len data... continuing"); | |
3500 | *sock_error = 1; | |
49d21f93 | 3501 | free(filter_expression); |
67676bd8 DG |
3502 | free(bytecode); |
3503 | free(exclusion); | |
3504 | ret = LTTNG_ERR_FILTER_INVAL; | |
3505 | goto error; | |
3506 | } | |
3507 | ||
3508 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
49d21f93 | 3509 | free(filter_expression); |
67676bd8 DG |
3510 | free(bytecode); |
3511 | free(exclusion); | |
3512 | ret = LTTNG_ERR_FILTER_INVAL; | |
3513 | goto error; | |
3514 | } | |
882ef835 | 3515 | } |
67676bd8 DG |
3516 | |
3517 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3518 | cmd_ctx->lsm->u.enable.channel_name, | |
6b453b5e JG |
3519 | &cmd_ctx->lsm->u.enable.event, |
3520 | filter_expression, bytecode, exclusion, | |
67676bd8 | 3521 | kernel_poll_pipe[1]); |
54d01ffb DG |
3522 | break; |
3523 | } | |
052da939 | 3524 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3525 | { |
9f19cc17 | 3526 | struct lttng_event *events; |
54d01ffb | 3527 | ssize_t nb_events; |
052da939 | 3528 | |
0845bbfa | 3529 | session_lock_list(); |
54d01ffb | 3530 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
0845bbfa | 3531 | session_unlock_list(); |
54d01ffb | 3532 | if (nb_events < 0) { |
f73fabfd | 3533 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3534 | ret = -nb_events; |
3535 | goto error; | |
2ef84c95 DG |
3536 | } |
3537 | ||
3538 | /* | |
3539 | * Setup lttng message with payload size set to the event list size in | |
3540 | * bytes and then copy list into the llm payload. | |
3541 | */ | |
052da939 | 3542 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3543 | if (ret < 0) { |
052da939 | 3544 | free(events); |
2ef84c95 DG |
3545 | goto setup_error; |
3546 | } | |
3547 | ||
3548 | /* Copy event list into message payload */ | |
9f19cc17 | 3549 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3550 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3551 | |
9f19cc17 | 3552 | free(events); |
2ef84c95 | 3553 | |
f73fabfd | 3554 | ret = LTTNG_OK; |
2ef84c95 DG |
3555 | break; |
3556 | } | |
f37d259d MD |
3557 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3558 | { | |
3559 | struct lttng_event_field *fields; | |
3560 | ssize_t nb_fields; | |
3561 | ||
0845bbfa | 3562 | session_lock_list(); |
a4b92340 DG |
3563 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3564 | &fields); | |
0845bbfa | 3565 | session_unlock_list(); |
f37d259d | 3566 | if (nb_fields < 0) { |
f73fabfd | 3567 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3568 | ret = -nb_fields; |
3569 | goto error; | |
3570 | } | |
3571 | ||
3572 | /* | |
3573 | * Setup lttng message with payload size set to the event list size in | |
3574 | * bytes and then copy list into the llm payload. | |
3575 | */ | |
a4b92340 DG |
3576 | ret = setup_lttng_msg(cmd_ctx, |
3577 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
3578 | if (ret < 0) { |
3579 | free(fields); | |
3580 | goto setup_error; | |
3581 | } | |
3582 | ||
3583 | /* Copy event list into message payload */ | |
3584 | memcpy(cmd_ctx->llm->payload, fields, | |
3585 | sizeof(struct lttng_event_field) * nb_fields); | |
3586 | ||
3587 | free(fields); | |
3588 | ||
f73fabfd | 3589 | ret = LTTNG_OK; |
f37d259d MD |
3590 | break; |
3591 | } | |
834978fd DG |
3592 | case LTTNG_LIST_SYSCALLS: |
3593 | { | |
3594 | struct lttng_event *events; | |
3595 | ssize_t nb_events; | |
3596 | ||
3597 | nb_events = cmd_list_syscalls(&events); | |
3598 | if (nb_events < 0) { | |
3599 | /* Return value is a negative lttng_error_code. */ | |
3600 | ret = -nb_events; | |
3601 | goto error; | |
3602 | } | |
3603 | ||
3604 | /* | |
3605 | * Setup lttng message with payload size set to the event list size in | |
3606 | * bytes and then copy list into the llm payload. | |
3607 | */ | |
3608 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); | |
3609 | if (ret < 0) { | |
3610 | free(events); | |
3611 | goto setup_error; | |
3612 | } | |
3613 | ||
3614 | /* Copy event list into message payload */ | |
3615 | memcpy(cmd_ctx->llm->payload, events, | |
3616 | sizeof(struct lttng_event) * nb_events); | |
3617 | ||
3618 | free(events); | |
3619 | ||
3620 | ret = LTTNG_OK; | |
3621 | break; | |
3622 | } | |
a5dfbb9d MD |
3623 | case LTTNG_LIST_TRACKER_PIDS: |
3624 | { | |
3625 | int32_t *pids = NULL; | |
3626 | ssize_t nr_pids; | |
3627 | ||
3628 | nr_pids = cmd_list_tracker_pids(cmd_ctx->session, | |
3629 | cmd_ctx->lsm->domain.type, &pids); | |
3630 | if (nr_pids < 0) { | |
3631 | /* Return value is a negative lttng_error_code. */ | |
3632 | ret = -nr_pids; | |
3633 | goto error; | |
3634 | } | |
3635 | ||
3636 | /* | |
3637 | * Setup lttng message with payload size set to the event list size in | |
3638 | * bytes and then copy list into the llm payload. | |
3639 | */ | |
3640 | ret = setup_lttng_msg(cmd_ctx, sizeof(int32_t) * nr_pids); | |
3641 | if (ret < 0) { | |
3642 | free(pids); | |
3643 | goto setup_error; | |
3644 | } | |
3645 | ||
3646 | /* Copy event list into message payload */ | |
3647 | memcpy(cmd_ctx->llm->payload, pids, | |
3648 | sizeof(int) * nr_pids); | |
3649 | ||
3650 | free(pids); | |
3651 | ||
3652 | ret = LTTNG_OK; | |
3653 | break; | |
3654 | } | |
00e2e675 DG |
3655 | case LTTNG_SET_CONSUMER_URI: |
3656 | { | |
a4b92340 DG |
3657 | size_t nb_uri, len; |
3658 | struct lttng_uri *uris; | |
3659 | ||
3660 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3661 | len = nb_uri * sizeof(struct lttng_uri); | |
3662 | ||
3663 | if (nb_uri == 0) { | |
f73fabfd | 3664 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3665 | goto error; |
3666 | } | |
3667 | ||
3668 | uris = zmalloc(len); | |
3669 | if (uris == NULL) { | |
f73fabfd | 3670 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3671 | goto error; |
3672 | } | |
3673 | ||
3674 | /* Receive variable len data */ | |
77c7c900 | 3675 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3676 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3677 | if (ret <= 0) { | |
3678 | DBG("No URIs received from client... continuing"); | |
3679 | *sock_error = 1; | |
f73fabfd | 3680 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3681 | free(uris); |
a4b92340 DG |
3682 | goto error; |
3683 | } | |
3684 | ||
bda32d56 JG |
3685 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); |
3686 | free(uris); | |
f73fabfd | 3687 | if (ret != LTTNG_OK) { |
a4b92340 DG |
3688 | goto error; |
3689 | } | |
3690 | ||
b1d41407 | 3691 | |
00e2e675 DG |
3692 | break; |
3693 | } | |
f3ed775e | 3694 | case LTTNG_START_TRACE: |
8c0faa1d | 3695 | { |
54d01ffb | 3696 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3697 | break; |
3698 | } | |
f3ed775e | 3699 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3700 | { |
54d01ffb | 3701 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3702 | break; |
3703 | } | |
5e16da05 MD |
3704 | case LTTNG_CREATE_SESSION: |
3705 | { | |
a4b92340 DG |
3706 | size_t nb_uri, len; |
3707 | struct lttng_uri *uris = NULL; | |
3708 | ||
3709 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3710 | len = nb_uri * sizeof(struct lttng_uri); | |
3711 | ||
3712 | if (nb_uri > 0) { | |
3713 | uris = zmalloc(len); | |
3714 | if (uris == NULL) { | |
f73fabfd | 3715 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3716 | goto error; |
3717 | } | |
3718 | ||
3719 | /* Receive variable len data */ | |
77c7c900 | 3720 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3721 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3722 | if (ret <= 0) { | |
3723 | DBG("No URIs received from client... continuing"); | |
3724 | *sock_error = 1; | |
f73fabfd | 3725 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3726 | free(uris); |
a4b92340 DG |
3727 | goto error; |
3728 | } | |
3729 | ||
3730 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3731 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3732 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3733 | free(uris); |
a4b92340 DG |
3734 | goto error; |
3735 | } | |
3736 | } | |
3737 | ||
3738 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3739 | &cmd_ctx->creds, 0); |
a4b92340 | 3740 | |
b1d41407 DG |
3741 | free(uris); |
3742 | ||
00e2e675 DG |
3743 | break; |
3744 | } | |
5e16da05 MD |
3745 | case LTTNG_DESTROY_SESSION: |
3746 | { | |
2f77fc4b | 3747 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3748 | |
3749 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3750 | cmd_ctx->session = NULL; |
5461b305 | 3751 | break; |
5e16da05 | 3752 | } |
9f19cc17 | 3753 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3754 | { |
54d01ffb | 3755 | ssize_t nb_dom; |
fa64dfb4 | 3756 | struct lttng_domain *domains = NULL; |
5461b305 | 3757 | |
54d01ffb DG |
3758 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3759 | if (nb_dom < 0) { | |
f73fabfd | 3760 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3761 | ret = -nb_dom; |
3762 | goto error; | |
ce3d728c | 3763 | } |
520ff687 | 3764 | |
54d01ffb | 3765 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 | 3766 | if (ret < 0) { |
ae9c20bc | 3767 | free(domains); |
5461b305 | 3768 | goto setup_error; |
520ff687 | 3769 | } |
57167058 | 3770 | |
54d01ffb DG |
3771 | /* Copy event list into message payload */ |
3772 | memcpy(cmd_ctx->llm->payload, domains, | |
3773 | nb_dom * sizeof(struct lttng_domain)); | |
3774 | ||
3775 | free(domains); | |
5e16da05 | 3776 | |
f73fabfd | 3777 | ret = LTTNG_OK; |
5e16da05 MD |
3778 | break; |
3779 | } | |
9f19cc17 | 3780 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3781 | { |
6775595e | 3782 | int nb_chan; |
ade7ce52 | 3783 | struct lttng_channel *channels = NULL; |
54d01ffb | 3784 | |
b551a063 DG |
3785 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3786 | cmd_ctx->session, &channels); | |
54d01ffb | 3787 | if (nb_chan < 0) { |
f73fabfd | 3788 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3789 | ret = -nb_chan; |
3790 | goto error; | |
5461b305 | 3791 | } |
ca95a216 | 3792 | |
54d01ffb | 3793 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 | 3794 | if (ret < 0) { |
ae9c20bc | 3795 | free(channels); |
5461b305 DG |
3796 | goto setup_error; |
3797 | } | |
9f19cc17 | 3798 | |
54d01ffb DG |
3799 | /* Copy event list into message payload */ |
3800 | memcpy(cmd_ctx->llm->payload, channels, | |
3801 | nb_chan * sizeof(struct lttng_channel)); | |
3802 | ||
3803 | free(channels); | |
9f19cc17 | 3804 | |
f73fabfd | 3805 | ret = LTTNG_OK; |
5461b305 | 3806 | break; |
5e16da05 | 3807 | } |
9f19cc17 | 3808 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3809 | { |
b551a063 | 3810 | ssize_t nb_event; |
684d34d2 | 3811 | struct lttng_event *events = NULL; |
9f19cc17 | 3812 | |
b551a063 | 3813 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3814 | cmd_ctx->lsm->u.list.channel_name, &events); |
3815 | if (nb_event < 0) { | |
f73fabfd | 3816 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3817 | ret = -nb_event; |
3818 | goto error; | |
5461b305 | 3819 | } |
ca95a216 | 3820 | |
54d01ffb | 3821 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 | 3822 | if (ret < 0) { |
ae9c20bc | 3823 | free(events); |
5461b305 DG |
3824 | goto setup_error; |
3825 | } | |
9f19cc17 | 3826 | |
54d01ffb DG |
3827 | /* Copy event list into message payload */ |
3828 | memcpy(cmd_ctx->llm->payload, events, | |
3829 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3830 | |
54d01ffb | 3831 | free(events); |
9f19cc17 | 3832 | |
f73fabfd | 3833 | ret = LTTNG_OK; |
5461b305 | 3834 | break; |
5e16da05 MD |
3835 | } |
3836 | case LTTNG_LIST_SESSIONS: | |
3837 | { | |
8e0af1b4 | 3838 | unsigned int nr_sessions; |
5461b305 | 3839 | |
8e0af1b4 | 3840 | session_lock_list(); |
730389d9 DG |
3841 | nr_sessions = lttng_sessions_count( |
3842 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3843 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3844 | |
8e0af1b4 | 3845 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3846 | if (ret < 0) { |
54d01ffb | 3847 | session_unlock_list(); |
5461b305 | 3848 | goto setup_error; |
e065084a | 3849 | } |
5e16da05 | 3850 | |
6c9cc2ab | 3851 | /* Filled the session array */ |
2f77fc4b | 3852 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3853 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3854 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3855 | |
54d01ffb | 3856 | session_unlock_list(); |
5e16da05 | 3857 | |
f73fabfd | 3858 | ret = LTTNG_OK; |
5e16da05 MD |
3859 | break; |
3860 | } | |
d0254c7c MD |
3861 | case LTTNG_CALIBRATE: |
3862 | { | |
54d01ffb DG |
3863 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3864 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3865 | break; |
3866 | } | |
d9800920 DG |
3867 | case LTTNG_REGISTER_CONSUMER: |
3868 | { | |
2f77fc4b DG |
3869 | struct consumer_data *cdata; |
3870 | ||
3871 | switch (cmd_ctx->lsm->domain.type) { | |
3872 | case LTTNG_DOMAIN_KERNEL: | |
3873 | cdata = &kconsumer_data; | |
3874 | break; | |
3875 | default: | |
f73fabfd | 3876 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3877 | goto error; |
3878 | } | |
3879 | ||
54d01ffb | 3880 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3881 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3882 | break; |
3883 | } | |
6d805429 | 3884 | case LTTNG_DATA_PENDING: |
806e2684 | 3885 | { |
f6151c55 JG |
3886 | int pending_ret; |
3887 | ||
3888 | /* 1 byte to return whether or not data is pending */ | |
3889 | ret = setup_lttng_msg(cmd_ctx, 1); | |
3890 | if (ret < 0) { | |
3891 | goto setup_error; | |
3892 | } | |
3893 | ||
3894 | pending_ret = cmd_data_pending(cmd_ctx->session); | |
3895 | /* | |
3896 | * FIXME | |
3897 | * | |
3898 | * This function may returns 0 or 1 to indicate whether or not | |
3899 | * there is data pending. In case of error, it should return an | |
3900 | * LTTNG_ERR code. However, some code paths may still return | |
3901 | * a nondescript error code, which we handle by returning an | |
3902 | * "unknown" error. | |
3903 | */ | |
3904 | if (pending_ret == 0 || pending_ret == 1) { | |
3905 | ret = LTTNG_OK; | |
3906 | } else if (pending_ret < 0) { | |
3907 | ret = LTTNG_ERR_UNK; | |
3908 | goto setup_error; | |
3909 | } else { | |
3910 | ret = pending_ret; | |
3911 | goto setup_error; | |
3912 | } | |
3913 | ||
3914 | *cmd_ctx->llm->payload = (uint8_t) pending_ret; | |
806e2684 DG |
3915 | break; |
3916 | } | |
da3c9ec1 DG |
3917 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3918 | { | |
6dc3064a DG |
3919 | struct lttcomm_lttng_output_id reply; |
3920 | ||
3921 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3922 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3923 | if (ret != LTTNG_OK) { | |
3924 | goto error; | |
3925 | } | |
3926 | ||
3927 | ret = setup_lttng_msg(cmd_ctx, sizeof(reply)); | |
3928 | if (ret < 0) { | |
3929 | goto setup_error; | |
3930 | } | |
3931 | ||
3932 | /* Copy output list into message payload */ | |
3933 | memcpy(cmd_ctx->llm->payload, &reply, sizeof(reply)); | |
3934 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3935 | break; |
3936 | } | |
3937 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3938 | { | |
6dc3064a DG |
3939 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3940 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3941 | break; |
3942 | } | |
3943 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3944 | { | |
6dc3064a DG |
3945 | ssize_t nb_output; |
3946 | struct lttng_snapshot_output *outputs = NULL; | |
3947 | ||
3948 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
3949 | if (nb_output < 0) { | |
3950 | ret = -nb_output; | |
3951 | goto error; | |
3952 | } | |
3953 | ||
3954 | ret = setup_lttng_msg(cmd_ctx, | |
3955 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3956 | if (ret < 0) { | |
3957 | free(outputs); | |
3958 | goto setup_error; | |
3959 | } | |
3960 | ||
3961 | if (outputs) { | |
3962 | /* Copy output list into message payload */ | |
3963 | memcpy(cmd_ctx->llm->payload, outputs, | |
3964 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3965 | free(outputs); | |
3966 | } | |
3967 | ||
3968 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3969 | break; |
3970 | } | |
3971 | case LTTNG_SNAPSHOT_RECORD: | |
3972 | { | |
6dc3064a DG |
3973 | ret = cmd_snapshot_record(cmd_ctx->session, |
3974 | &cmd_ctx->lsm->u.snapshot_record.output, | |
3975 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
3976 | break; |
3977 | } | |
27babd3a DG |
3978 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
3979 | { | |
3980 | size_t nb_uri, len; | |
3981 | struct lttng_uri *uris = NULL; | |
3982 | ||
3983 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3984 | len = nb_uri * sizeof(struct lttng_uri); | |
3985 | ||
3986 | if (nb_uri > 0) { | |
3987 | uris = zmalloc(len); | |
3988 | if (uris == NULL) { | |
3989 | ret = LTTNG_ERR_FATAL; | |
3990 | goto error; | |
3991 | } | |
3992 | ||
3993 | /* Receive variable len data */ | |
3994 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3995 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3996 | if (ret <= 0) { | |
3997 | DBG("No URIs received from client... continuing"); | |
3998 | *sock_error = 1; | |
3999 | ret = LTTNG_ERR_SESSION_FAIL; | |
4000 | free(uris); | |
4001 | goto error; | |
4002 | } | |
4003 | ||
4004 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4005 | DBG("Creating session with ONE network URI is a bad call"); | |
4006 | ret = LTTNG_ERR_SESSION_FAIL; | |
4007 | free(uris); | |
4008 | goto error; | |
4009 | } | |
4010 | } | |
4011 | ||
4012 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
4013 | nb_uri, &cmd_ctx->creds); | |
4014 | free(uris); | |
4015 | break; | |
4016 | } | |
ecc48a90 JD |
4017 | case LTTNG_CREATE_SESSION_LIVE: |
4018 | { | |
4019 | size_t nb_uri, len; | |
4020 | struct lttng_uri *uris = NULL; | |
4021 | ||
4022 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4023 | len = nb_uri * sizeof(struct lttng_uri); | |
4024 | ||
4025 | if (nb_uri > 0) { | |
4026 | uris = zmalloc(len); | |
4027 | if (uris == NULL) { | |
4028 | ret = LTTNG_ERR_FATAL; | |
4029 | goto error; | |
4030 | } | |
4031 | ||
4032 | /* Receive variable len data */ | |
4033 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
4034 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
4035 | if (ret <= 0) { | |
4036 | DBG("No URIs received from client... continuing"); | |
4037 | *sock_error = 1; | |
4038 | ret = LTTNG_ERR_SESSION_FAIL; | |
4039 | free(uris); | |
4040 | goto error; | |
4041 | } | |
4042 | ||
4043 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4044 | DBG("Creating session with ONE network URI is a bad call"); | |
4045 | ret = LTTNG_ERR_SESSION_FAIL; | |
4046 | free(uris); | |
4047 | goto error; | |
4048 | } | |
4049 | } | |
4050 | ||
4051 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
4052 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
4053 | free(uris); | |
4054 | break; | |
4055 | } | |
fb198a11 JG |
4056 | case LTTNG_SAVE_SESSION: |
4057 | { | |
4058 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
4059 | &cmd_ctx->creds); | |
4060 | break; | |
4061 | } | |
d7ba1388 MD |
4062 | case LTTNG_SET_SESSION_SHM_PATH: |
4063 | { | |
4064 | ret = cmd_set_session_shm_path(cmd_ctx->session, | |
4065 | cmd_ctx->lsm->u.set_shm_path.shm_path); | |
4066 | break; | |
4067 | } | |
5e16da05 | 4068 | default: |
f73fabfd | 4069 | ret = LTTNG_ERR_UND; |
5461b305 | 4070 | break; |
fac6795d DG |
4071 | } |
4072 | ||
5461b305 | 4073 | error: |
5461b305 DG |
4074 | if (cmd_ctx->llm == NULL) { |
4075 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 4076 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
4077 | goto setup_error; |
4078 | } | |
4079 | } | |
54d01ffb | 4080 | /* Set return code */ |
5461b305 | 4081 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 4082 | setup_error: |
b5541356 | 4083 | if (cmd_ctx->session) { |
54d01ffb | 4084 | session_unlock(cmd_ctx->session); |
b5541356 | 4085 | } |
256a5576 MD |
4086 | if (need_tracing_session) { |
4087 | session_unlock_list(); | |
4088 | } | |
54d01ffb | 4089 | init_setup_error: |
3745d315 | 4090 | assert(!rcu_read_ongoing()); |
8028d920 | 4091 | return ret; |
fac6795d DG |
4092 | } |
4093 | ||
44a5e5eb DG |
4094 | /* |
4095 | * Thread managing health check socket. | |
4096 | */ | |
4097 | static void *thread_manage_health(void *data) | |
4098 | { | |
eb4a2943 | 4099 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
4100 | uint32_t revents, nb_fd; |
4101 | struct lttng_poll_event events; | |
0c89d795 MD |
4102 | struct health_comm_msg msg; |
4103 | struct health_comm_reply reply; | |
44a5e5eb DG |
4104 | |
4105 | DBG("[thread] Manage health check started"); | |
4106 | ||
4107 | rcu_register_thread(); | |
4108 | ||
6d737ce4 DG |
4109 | /* We might hit an error path before this is created. */ |
4110 | lttng_poll_init(&events); | |
3cc04881 | 4111 | |
44a5e5eb DG |
4112 | /* Create unix socket */ |
4113 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
4114 | if (sock < 0) { | |
4115 | ERR("Unable to create health check Unix socket"); | |
4116 | ret = -1; | |
4117 | goto error; | |
4118 | } | |
4119 | ||
6c71277b MD |
4120 | if (is_root) { |
4121 | /* lttng health client socket path permissions */ | |
4122 | ret = chown(health_unix_sock_path, 0, | |
4123 | utils_get_group_id(tracing_group_name)); | |
4124 | if (ret < 0) { | |
4125 | ERR("Unable to set group on %s", health_unix_sock_path); | |
4126 | PERROR("chown"); | |
4127 | ret = -1; | |
4128 | goto error; | |
4129 | } | |
4130 | ||
4131 | ret = chmod(health_unix_sock_path, | |
4132 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4133 | if (ret < 0) { | |
4134 | ERR("Unable to set permissions on %s", health_unix_sock_path); | |
4135 | PERROR("chmod"); | |
4136 | ret = -1; | |
4137 | goto error; | |
4138 | } | |
4139 | } | |
4140 | ||
b662582b DG |
4141 | /* |
4142 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4143 | * show must go on. | |
4144 | */ | |
4145 | (void) utils_set_fd_cloexec(sock); | |
4146 | ||
44a5e5eb DG |
4147 | ret = lttcomm_listen_unix_sock(sock); |
4148 | if (ret < 0) { | |
4149 | goto error; | |
4150 | } | |
4151 | ||
4152 | /* | |
4153 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4154 | * more will be added to this poll set. | |
4155 | */ | |
d0b96690 | 4156 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
4157 | if (ret < 0) { |
4158 | goto error; | |
4159 | } | |
4160 | ||
4161 | /* Add the application registration socket */ | |
4162 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
4163 | if (ret < 0) { | |
4164 | goto error; | |
4165 | } | |
4166 | ||
ef367a93 | 4167 | sessiond_notify_ready(); |
97bc1426 | 4168 | |
44a5e5eb DG |
4169 | while (1) { |
4170 | DBG("Health check ready"); | |
4171 | ||
44a5e5eb DG |
4172 | /* Inifinite blocking call, waiting for transmission */ |
4173 | restart: | |
4174 | ret = lttng_poll_wait(&events, -1); | |
4175 | if (ret < 0) { | |
4176 | /* | |
4177 | * Restart interrupted system call. | |
4178 | */ | |
4179 | if (errno == EINTR) { | |
4180 | goto restart; | |
4181 | } | |
4182 | goto error; | |
4183 | } | |
4184 | ||
0d9c5d77 DG |
4185 | nb_fd = ret; |
4186 | ||
44a5e5eb DG |
4187 | for (i = 0; i < nb_fd; i++) { |
4188 | /* Fetch once the poll data */ | |
4189 | revents = LTTNG_POLL_GETEV(&events, i); | |
4190 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4191 | ||
fd20dac9 MD |
4192 | if (!revents) { |
4193 | /* No activity for this FD (poll implementation). */ | |
4194 | continue; | |
4195 | } | |
4196 | ||
44a5e5eb | 4197 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4198 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 4199 | if (ret) { |
139ac872 MD |
4200 | err = 0; |
4201 | goto exit; | |
44a5e5eb DG |
4202 | } |
4203 | ||
4204 | /* Event on the registration socket */ | |
4205 | if (pollfd == sock) { | |
03e43155 MD |
4206 | if (revents & LPOLLIN) { |
4207 | continue; | |
4208 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
44a5e5eb DG |
4209 | ERR("Health socket poll error"); |
4210 | goto error; | |
03e43155 MD |
4211 | } else { |
4212 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4213 | goto error; | |
44a5e5eb DG |
4214 | } |
4215 | } | |
4216 | } | |
4217 | ||
4218 | new_sock = lttcomm_accept_unix_sock(sock); | |
4219 | if (new_sock < 0) { | |
4220 | goto error; | |
4221 | } | |
4222 | ||
b662582b DG |
4223 | /* |
4224 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4225 | * show must go on. | |
4226 | */ | |
4227 | (void) utils_set_fd_cloexec(new_sock); | |
4228 | ||
44a5e5eb DG |
4229 | DBG("Receiving data from client for health..."); |
4230 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
4231 | if (ret <= 0) { | |
4232 | DBG("Nothing recv() from client... continuing"); | |
4233 | ret = close(new_sock); | |
4234 | if (ret) { | |
4235 | PERROR("close"); | |
4236 | } | |
4237 | new_sock = -1; | |
4238 | continue; | |
4239 | } | |
4240 | ||
4241 | rcu_thread_online(); | |
4242 | ||
53efb85a | 4243 | memset(&reply, 0, sizeof(reply)); |
6c71277b MD |
4244 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { |
4245 | /* | |
4246 | * health_check_state returns 0 if health is | |
4247 | * bad. | |
4248 | */ | |
4249 | if (!health_check_state(health_sessiond, i)) { | |
4250 | reply.ret_code |= 1ULL << i; | |
4251 | } | |
44a5e5eb DG |
4252 | } |
4253 | ||
6c71277b | 4254 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
4255 | |
4256 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
4257 | if (ret < 0) { | |
4258 | ERR("Failed to send health data back to client"); | |
4259 | } | |
4260 | ||
4261 | /* End of transmission */ | |
4262 | ret = close(new_sock); | |
4263 | if (ret) { | |
4264 | PERROR("close"); | |
4265 | } | |
4266 | new_sock = -1; | |
4267 | } | |
4268 | ||
139ac872 | 4269 | exit: |
44a5e5eb | 4270 | error: |
139ac872 MD |
4271 | if (err) { |
4272 | ERR("Health error occurred in %s", __func__); | |
4273 | } | |
44a5e5eb DG |
4274 | DBG("Health check thread dying"); |
4275 | unlink(health_unix_sock_path); | |
4276 | if (sock >= 0) { | |
4277 | ret = close(sock); | |
4278 | if (ret) { | |
4279 | PERROR("close"); | |
4280 | } | |
4281 | } | |
44a5e5eb DG |
4282 | |
4283 | lttng_poll_clean(&events); | |
4284 | ||
4285 | rcu_unregister_thread(); | |
4286 | return NULL; | |
4287 | } | |
4288 | ||
1d4b027a | 4289 | /* |
d063d709 DG |
4290 | * This thread manage all clients request using the unix client socket for |
4291 | * communication. | |
1d4b027a DG |
4292 | */ |
4293 | static void *thread_manage_clients(void *data) | |
4294 | { | |
139ac872 | 4295 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 4296 | int sock_error; |
5eb91c98 | 4297 | uint32_t revents, nb_fd; |
273ea72c | 4298 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 4299 | struct lttng_poll_event events; |
1d4b027a DG |
4300 | |
4301 | DBG("[thread] Manage client started"); | |
4302 | ||
f6a9efaa DG |
4303 | rcu_register_thread(); |
4304 | ||
6c71277b | 4305 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 4306 | |
840cb59c | 4307 | health_code_update(); |
44a5e5eb | 4308 | |
1d4b027a DG |
4309 | ret = lttcomm_listen_unix_sock(client_sock); |
4310 | if (ret < 0) { | |
35df2755 | 4311 | goto error_listen; |
1d4b027a DG |
4312 | } |
4313 | ||
5eb91c98 DG |
4314 | /* |
4315 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4316 | * more will be added to this poll set. | |
4317 | */ | |
d0b96690 | 4318 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 4319 | if (ret < 0) { |
35df2755 | 4320 | goto error_create_poll; |
5eb91c98 | 4321 | } |
273ea72c | 4322 | |
5eb91c98 DG |
4323 | /* Add the application registration socket */ |
4324 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
4325 | if (ret < 0) { | |
4326 | goto error; | |
4327 | } | |
273ea72c | 4328 | |
ef367a93 JG |
4329 | sessiond_notify_ready(); |
4330 | ret = sem_post(&load_info->message_thread_ready); | |
4331 | if (ret) { | |
4332 | PERROR("sem_post message_thread_ready"); | |
4333 | goto error; | |
4334 | } | |
0bb7724a | 4335 | |
72453c8c MD |
4336 | /* This testpoint is after we signal readiness to the parent. */ |
4337 | if (testpoint(sessiond_thread_manage_clients)) { | |
4338 | goto error; | |
4339 | } | |
4340 | ||
e547b070 | 4341 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
4342 | goto error; |
4343 | } | |
8ac94142 | 4344 | |
840cb59c | 4345 | health_code_update(); |
44a5e5eb | 4346 | |
1d4b027a | 4347 | while (1) { |
1d4b027a | 4348 | DBG("Accepting client command ..."); |
273ea72c DG |
4349 | |
4350 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 4351 | restart: |
a78af745 | 4352 | health_poll_entry(); |
5eb91c98 | 4353 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 4354 | health_poll_exit(); |
273ea72c | 4355 | if (ret < 0) { |
88f2b785 MD |
4356 | /* |
4357 | * Restart interrupted system call. | |
4358 | */ | |
4359 | if (errno == EINTR) { | |
4360 | goto restart; | |
4361 | } | |
273ea72c DG |
4362 | goto error; |
4363 | } | |
4364 | ||
0d9c5d77 DG |
4365 | nb_fd = ret; |
4366 | ||
5eb91c98 DG |
4367 | for (i = 0; i < nb_fd; i++) { |
4368 | /* Fetch once the poll data */ | |
4369 | revents = LTTNG_POLL_GETEV(&events, i); | |
4370 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4371 | ||
840cb59c | 4372 | health_code_update(); |
44a5e5eb | 4373 | |
fd20dac9 MD |
4374 | if (!revents) { |
4375 | /* No activity for this FD (poll implementation). */ | |
4376 | continue; | |
4377 | } | |
4378 | ||
5eb91c98 | 4379 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4380 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 4381 | if (ret) { |
139ac872 MD |
4382 | err = 0; |
4383 | goto exit; | |
5eb91c98 DG |
4384 | } |
4385 | ||
4386 | /* Event on the registration socket */ | |
4387 | if (pollfd == client_sock) { | |
03e43155 MD |
4388 | if (revents & LPOLLIN) { |
4389 | continue; | |
4390 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
5eb91c98 DG |
4391 | ERR("Client socket poll error"); |
4392 | goto error; | |
03e43155 MD |
4393 | } else { |
4394 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4395 | goto error; | |
5eb91c98 DG |
4396 | } |
4397 | } | |
4398 | } | |
4399 | ||
4400 | DBG("Wait for client response"); | |
4401 | ||
840cb59c | 4402 | health_code_update(); |
44a5e5eb | 4403 | |
5eb91c98 DG |
4404 | sock = lttcomm_accept_unix_sock(client_sock); |
4405 | if (sock < 0) { | |
273ea72c | 4406 | goto error; |
273ea72c DG |
4407 | } |
4408 | ||
b662582b DG |
4409 | /* |
4410 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4411 | * show must go on. | |
4412 | */ | |
4413 | (void) utils_set_fd_cloexec(sock); | |
4414 | ||
be040666 DG |
4415 | /* Set socket option for credentials retrieval */ |
4416 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
4417 | if (ret < 0) { | |
4418 | goto error; | |
4419 | } | |
4420 | ||
5eb91c98 | 4421 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 4422 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 4423 | if (cmd_ctx == NULL) { |
76d7553f | 4424 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 4425 | goto error; |
5eb91c98 | 4426 | } |
1d4b027a | 4427 | |
5eb91c98 | 4428 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 4429 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 4430 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 4431 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
4432 | goto error; |
4433 | } | |
1d4b027a | 4434 | |
5eb91c98 DG |
4435 | cmd_ctx->llm = NULL; |
4436 | cmd_ctx->session = NULL; | |
1d4b027a | 4437 | |
840cb59c | 4438 | health_code_update(); |
44a5e5eb | 4439 | |
5eb91c98 DG |
4440 | /* |
4441 | * Data is received from the lttng client. The struct | |
4442 | * lttcomm_session_msg (lsm) contains the command and data request of | |
4443 | * the client. | |
4444 | */ | |
4445 | DBG("Receiving data from client ..."); | |
be040666 DG |
4446 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
4447 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
4448 | if (ret <= 0) { |
4449 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
4450 | ret = close(sock); |
4451 | if (ret) { | |
4452 | PERROR("close"); | |
4453 | } | |
4454 | sock = -1; | |
a2c0da86 | 4455 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4456 | continue; |
4457 | } | |
1d4b027a | 4458 | |
840cb59c | 4459 | health_code_update(); |
44a5e5eb | 4460 | |
5eb91c98 DG |
4461 | // TODO: Validate cmd_ctx including sanity check for |
4462 | // security purpose. | |
f7776ea7 | 4463 | |
f6a9efaa | 4464 | rcu_thread_online(); |
5eb91c98 DG |
4465 | /* |
4466 | * This function dispatch the work to the kernel or userspace tracer | |
4467 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
4468 | * informations for the client. The command context struct contains | |
4469 | * everything this function may needs. | |
4470 | */ | |
53a80697 | 4471 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 4472 | rcu_thread_offline(); |
5eb91c98 | 4473 | if (ret < 0) { |
36134aa1 DG |
4474 | ret = close(sock); |
4475 | if (ret) { | |
4476 | PERROR("close"); | |
53a80697 | 4477 | } |
36134aa1 | 4478 | sock = -1; |
bbd973c2 | 4479 | /* |
5eb91c98 | 4480 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 4481 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
4482 | * (ENOMEM). Error detected but still accept |
4483 | * command, unless a socket error has been | |
4484 | * detected. | |
bbd973c2 | 4485 | */ |
bbd973c2 | 4486 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4487 | continue; |
4488 | } | |
d6e4fca4 | 4489 | |
840cb59c | 4490 | health_code_update(); |
44a5e5eb | 4491 | |
a1ac8b97 | 4492 | DBG("Sending response (size: %d, retcode: %s (%d))", |
54d01ffb | 4493 | cmd_ctx->lttng_msg_size, |
a1ac8b97 JG |
4494 | lttng_strerror(-cmd_ctx->llm->ret_code), |
4495 | cmd_ctx->llm->ret_code); | |
54d01ffb | 4496 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
4497 | if (ret < 0) { |
4498 | ERR("Failed to send data back to client"); | |
bbd973c2 | 4499 | } |
1d4b027a | 4500 | |
5eb91c98 | 4501 | /* End of transmission */ |
76d7553f MD |
4502 | ret = close(sock); |
4503 | if (ret) { | |
4504 | PERROR("close"); | |
4505 | } | |
4506 | sock = -1; | |
be040666 DG |
4507 | |
4508 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 4509 | |
840cb59c | 4510 | health_code_update(); |
273ea72c DG |
4511 | } |
4512 | ||
139ac872 | 4513 | exit: |
5eb91c98 | 4514 | error: |
35df2755 CB |
4515 | if (sock >= 0) { |
4516 | ret = close(sock); | |
4517 | if (ret) { | |
4518 | PERROR("close"); | |
4519 | } | |
139ac872 | 4520 | } |
44a5e5eb | 4521 | |
35df2755 CB |
4522 | lttng_poll_clean(&events); |
4523 | clean_command_ctx(&cmd_ctx); | |
4524 | ||
4525 | error_listen: | |
4526 | error_create_poll: | |
273ea72c | 4527 | unlink(client_unix_sock_path); |
76d7553f MD |
4528 | if (client_sock >= 0) { |
4529 | ret = close(client_sock); | |
4530 | if (ret) { | |
4531 | PERROR("close"); | |
4532 | } | |
a4b35e07 | 4533 | } |
35df2755 CB |
4534 | |
4535 | if (err) { | |
840cb59c | 4536 | health_error(); |
35df2755 | 4537 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4538 | } |
273ea72c | 4539 | |
8782cc74 | 4540 | health_unregister(health_sessiond); |
35df2755 CB |
4541 | |
4542 | DBG("Client thread dying"); | |
f6a9efaa DG |
4543 | |
4544 | rcu_unregister_thread(); | |
4a15001e MD |
4545 | |
4546 | /* | |
4547 | * Since we are creating the consumer threads, we own them, so we need | |
4548 | * to join them before our thread exits. | |
4549 | */ | |
4550 | ret = join_consumer_thread(&kconsumer_data); | |
4551 | if (ret) { | |
4552 | errno = ret; | |
4553 | PERROR("join_consumer"); | |
4554 | } | |
4555 | ||
4556 | ret = join_consumer_thread(&ustconsumer32_data); | |
4557 | if (ret) { | |
4558 | errno = ret; | |
4559 | PERROR("join_consumer ust32"); | |
4560 | } | |
4561 | ||
4562 | ret = join_consumer_thread(&ustconsumer64_data); | |
4563 | if (ret) { | |
4564 | errno = ret; | |
4565 | PERROR("join_consumer ust64"); | |
4566 | } | |
1d4b027a DG |
4567 | return NULL; |
4568 | } | |
4569 | ||
4570 | ||
fac6795d DG |
4571 | /* |
4572 | * usage function on stderr | |
4573 | */ | |
4574 | static void usage(void) | |
4575 | { | |
b716ce68 | 4576 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
4577 | fprintf(stderr, " -h, --help Display this usage.\n"); |
4578 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
4579 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
4580 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
4581 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
4582 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
4583 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
4584 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
4585 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
4586 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
4587 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
4588 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
4589 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 | 4590 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
72dd7491 | 4591 | fprintf(stderr, " -b, --background Start as a daemon, keeping console open.\n"); |
d6f42150 DG |
4592 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); |
4593 | fprintf(stderr, " -V, --version Show version number.\n"); | |
7fe6d2c5 | 4594 | fprintf(stderr, " -S, --sig-parent Send SIGUSR1 to parent pid to notify readiness.\n"); |
d6f42150 DG |
4595 | fprintf(stderr, " -q, --quiet No output at all.\n"); |
4596 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
35f90c40 | 4597 | fprintf(stderr, " -p, --pidfile FILE Write a pid to FILE name overriding the default value.\n"); |
3bd1e081 | 4598 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 4599 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
1b2ef7fe | 4600 | fprintf(stderr, " --agent-tcp-port Agent registration TCP port\n"); |
76d01ebb | 4601 | fprintf(stderr, " -f --config PATH Load daemon configuration file\n"); |
ef367a93 | 4602 | fprintf(stderr, " -l --load PATH Load session configuration\n"); |
fbb9748b | 4603 | fprintf(stderr, " --kmod-probes Specify kernel module probes to load\n"); |
c9d42407 | 4604 | fprintf(stderr, " --extra-kmod-probes Specify extra kernel module probes to load\n"); |
fac6795d DG |
4605 | } |
4606 | ||
c0232ea5 JG |
4607 | static int string_match(const char *str1, const char *str2) |
4608 | { | |
4609 | return (str1 && str2) && !strcmp(str1, str2); | |
4610 | } | |
4611 | ||
fac6795d | 4612 | /* |
26296c48 JG |
4613 | * Take an option from the getopt output and set it in the right variable to be |
4614 | * used later. | |
4615 | * | |
4616 | * Return 0 on success else a negative value. | |
fac6795d | 4617 | */ |
26296c48 | 4618 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4619 | { |
26296c48 | 4620 | int ret = 0; |
fac6795d | 4621 | |
c5d350b2 JG |
4622 | if (arg && arg[0] == '\0') { |
4623 | /* | |
4624 | * This only happens if the value is read from daemon config | |
4625 | * file. This means the option requires an argument and the | |
4626 | * configuration file contains a line such as: | |
4627 | * my_option = | |
4628 | */ | |
4629 | ret = -EINVAL; | |
4630 | goto end; | |
4631 | } | |
4632 | ||
c0232ea5 | 4633 | if (string_match(optname, "client-sock") || opt == 'c') { |
e8fa9fb0 MD |
4634 | if (lttng_is_setuid_setgid()) { |
4635 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4636 | "-c, --client-sock"); | |
4637 | } else { | |
4638 | snprintf(client_unix_sock_path, PATH_MAX, "%s", arg); | |
4639 | } | |
c0232ea5 | 4640 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
e8fa9fb0 MD |
4641 | if (lttng_is_setuid_setgid()) { |
4642 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4643 | "-a, --apps-sock"); | |
4644 | } else { | |
4645 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", arg); | |
4646 | } | |
c0232ea5 | 4647 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
26296c48 | 4648 | opt_daemon = 1; |
c0232ea5 | 4649 | } else if (string_match(optname, "background") || opt == 'b') { |
72dd7491 | 4650 | opt_background = 1; |
c0232ea5 | 4651 | } else if (string_match(optname, "group") || opt == 'g') { |
e8fa9fb0 MD |
4652 | if (lttng_is_setuid_setgid()) { |
4653 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4654 | "-g, --group"); | |
4655 | } else { | |
4656 | /* | |
4657 | * If the override option is set, the pointer points to a | |
4658 | * *non* const thus freeing it even though the variable type is | |
4659 | * set to const. | |
4660 | */ | |
4661 | if (tracing_group_name_override) { | |
4662 | free((void *) tracing_group_name); | |
4663 | } | |
4664 | tracing_group_name = strdup(arg); | |
4665 | if (!tracing_group_name) { | |
4666 | PERROR("strdup"); | |
4667 | ret = -ENOMEM; | |
4668 | } | |
4669 | tracing_group_name_override = 1; | |
db322c4d | 4670 | } |
c0232ea5 | 4671 | } else if (string_match(optname, "help") || opt == 'h') { |
26296c48 | 4672 | usage(); |
4a15001e | 4673 | exit(EXIT_SUCCESS); |
c0232ea5 | 4674 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
4675 | fprintf(stdout, "%s\n", VERSION); |
4676 | exit(EXIT_SUCCESS); | |
c0232ea5 | 4677 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
26296c48 | 4678 | opt_sig_parent = 1; |
c0232ea5 | 4679 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
e8fa9fb0 MD |
4680 | if (lttng_is_setuid_setgid()) { |
4681 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4682 | "--kconsumerd-err-sock"); | |
4683 | } else { | |
4684 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4685 | } | |
c0232ea5 | 4686 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
e8fa9fb0 MD |
4687 | if (lttng_is_setuid_setgid()) { |
4688 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4689 | "--kconsumerd-cmd-sock"); | |
4690 | } else { | |
4691 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4692 | } | |
c0232ea5 | 4693 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
e8fa9fb0 MD |
4694 | if (lttng_is_setuid_setgid()) { |
4695 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4696 | "--ustconsumerd64-err-sock"); | |
4697 | } else { | |
4698 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4699 | } | |
c0232ea5 | 4700 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
e8fa9fb0 MD |
4701 | if (lttng_is_setuid_setgid()) { |
4702 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4703 | "--ustconsumerd64-cmd-sock"); | |
4704 | } else { | |
4705 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4706 | } | |
c0232ea5 | 4707 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
e8fa9fb0 MD |
4708 | if (lttng_is_setuid_setgid()) { |
4709 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4710 | "--ustconsumerd32-err-sock"); | |
4711 | } else { | |
4712 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4713 | } | |
c0232ea5 | 4714 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
e8fa9fb0 MD |
4715 | if (lttng_is_setuid_setgid()) { |
4716 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4717 | "--ustconsumerd32-cmd-sock"); | |
4718 | } else { | |
4719 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4720 | } | |
c0232ea5 | 4721 | } else if (string_match(optname, "no-kernel")) { |
26296c48 | 4722 | opt_no_kernel = 1; |
c0232ea5 | 4723 | } else if (string_match(optname, "quiet") || opt == 'q') { |
26296c48 | 4724 | lttng_opt_quiet = 1; |
c0232ea5 | 4725 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
4726 | /* Verbose level can increase using multiple -v */ |
4727 | if (arg) { | |
13755a18 | 4728 | /* Value obtained from config file */ |
26296c48 JG |
4729 | lttng_opt_verbose = config_parse_value(arg); |
4730 | } else { | |
13755a18 JG |
4731 | /* -v used on command line */ |
4732 | lttng_opt_verbose++; | |
26296c48 | 4733 | } |
13755a18 JG |
4734 | /* Clamp value to [0, 3] */ |
4735 | lttng_opt_verbose = lttng_opt_verbose < 0 ? 0 : | |
4736 | (lttng_opt_verbose <= 3 ? lttng_opt_verbose : 3); | |
c0232ea5 | 4737 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 JG |
4738 | if (arg) { |
4739 | opt_verbose_consumer = config_parse_value(arg); | |
4740 | } else { | |
3bd1e081 | 4741 | opt_verbose_consumer += 1; |
26296c48 | 4742 | } |
c0232ea5 | 4743 | } else if (string_match(optname, "consumerd32-path")) { |
e8fa9fb0 MD |
4744 | if (lttng_is_setuid_setgid()) { |
4745 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4746 | "--consumerd32-path"); | |
4747 | } else { | |
4748 | if (consumerd32_bin_override) { | |
4749 | free((void *) consumerd32_bin); | |
4750 | } | |
4751 | consumerd32_bin = strdup(arg); | |
4752 | if (!consumerd32_bin) { | |
4753 | PERROR("strdup"); | |
4754 | ret = -ENOMEM; | |
4755 | } | |
4756 | consumerd32_bin_override = 1; | |
db322c4d | 4757 | } |
c0232ea5 | 4758 | } else if (string_match(optname, "consumerd32-libdir")) { |
e8fa9fb0 MD |
4759 | if (lttng_is_setuid_setgid()) { |
4760 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4761 | "--consumerd32-libdir"); | |
4762 | } else { | |
4763 | if (consumerd32_libdir_override) { | |
4764 | free((void *) consumerd32_libdir); | |
4765 | } | |
4766 | consumerd32_libdir = strdup(arg); | |
4767 | if (!consumerd32_libdir) { | |
4768 | PERROR("strdup"); | |
4769 | ret = -ENOMEM; | |
4770 | } | |
4771 | consumerd32_libdir_override = 1; | |
db322c4d | 4772 | } |
c0232ea5 | 4773 | } else if (string_match(optname, "consumerd64-path")) { |
e8fa9fb0 MD |
4774 | if (lttng_is_setuid_setgid()) { |
4775 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4776 | "--consumerd64-path"); | |
4777 | } else { | |
4778 | if (consumerd64_bin_override) { | |
4779 | free((void *) consumerd64_bin); | |
4780 | } | |
4781 | consumerd64_bin = strdup(arg); | |
4782 | if (!consumerd64_bin) { | |
4783 | PERROR("strdup"); | |
4784 | ret = -ENOMEM; | |
4785 | } | |
4786 | consumerd64_bin_override = 1; | |
db322c4d | 4787 | } |
c0232ea5 | 4788 | } else if (string_match(optname, "consumerd64-libdir")) { |
e8fa9fb0 MD |
4789 | if (lttng_is_setuid_setgid()) { |
4790 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4791 | "--consumerd64-libdir"); | |
4792 | } else { | |
4793 | if (consumerd64_libdir_override) { | |
4794 | free((void *) consumerd64_libdir); | |
4795 | } | |
4796 | consumerd64_libdir = strdup(arg); | |
4797 | if (!consumerd64_libdir) { | |
4798 | PERROR("strdup"); | |
4799 | ret = -ENOMEM; | |
4800 | } | |
4801 | consumerd64_libdir_override = 1; | |
db322c4d | 4802 | } |
c0232ea5 | 4803 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
e8fa9fb0 MD |
4804 | if (lttng_is_setuid_setgid()) { |
4805 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4806 | "-p, --pidfile"); | |
4807 | } else { | |
4808 | free(opt_pidfile); | |
4809 | opt_pidfile = strdup(arg); | |
4810 | if (!opt_pidfile) { | |
4811 | PERROR("strdup"); | |
4812 | ret = -ENOMEM; | |
4813 | } | |
db322c4d | 4814 | } |
c0232ea5 | 4815 | } else if (string_match(optname, "agent-tcp-port")) { |
e8fa9fb0 MD |
4816 | if (lttng_is_setuid_setgid()) { |
4817 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4818 | "--agent-tcp-port"); | |
4819 | } else { | |
4820 | unsigned long v; | |
4d076222 | 4821 | |
e04aa23e JG |
4822 | if (!arg) { |
4823 | ret = -EINVAL; | |
4824 | goto end; | |
4825 | } | |
e8fa9fb0 MD |
4826 | errno = 0; |
4827 | v = strtoul(arg, NULL, 0); | |
4828 | if (errno != 0 || !isdigit(arg[0])) { | |
4829 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
4830 | return -1; | |
4831 | } | |
4832 | if (v == 0 || v >= 65535) { | |
4833 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
4834 | return -1; | |
4835 | } | |
4836 | agent_tcp_port = (uint32_t) v; | |
4837 | DBG3("Agent TCP port set to non default: %u", agent_tcp_port); | |
26296c48 | 4838 | } |
c0232ea5 | 4839 | } else if (string_match(optname, "load") || opt == 'l') { |
e8fa9fb0 MD |
4840 | if (lttng_is_setuid_setgid()) { |
4841 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4842 | "-l, --load"); | |
4843 | } else { | |
4844 | free(opt_load_session_path); | |
4845 | opt_load_session_path = strdup(arg); | |
4846 | if (!opt_load_session_path) { | |
4847 | PERROR("strdup"); | |
4848 | ret = -ENOMEM; | |
4849 | } | |
ef367a93 | 4850 | } |
c0232ea5 | 4851 | } else if (string_match(optname, "kmod-probes")) { |
e8fa9fb0 MD |
4852 | if (lttng_is_setuid_setgid()) { |
4853 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4854 | "--kmod-probes"); | |
4855 | } else { | |
4856 | free(kmod_probes_list); | |
4857 | kmod_probes_list = strdup(arg); | |
4858 | if (!kmod_probes_list) { | |
4859 | PERROR("strdup"); | |
4860 | ret = -ENOMEM; | |
4861 | } | |
c9d42407 | 4862 | } |
c0232ea5 | 4863 | } else if (string_match(optname, "extra-kmod-probes")) { |
e8fa9fb0 MD |
4864 | if (lttng_is_setuid_setgid()) { |
4865 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4866 | "--extra-kmod-probes"); | |
4867 | } else { | |
4868 | free(kmod_extra_probes_list); | |
4869 | kmod_extra_probes_list = strdup(arg); | |
4870 | if (!kmod_extra_probes_list) { | |
4871 | PERROR("strdup"); | |
4872 | ret = -ENOMEM; | |
4873 | } | |
db322c4d | 4874 | } |
c0232ea5 JG |
4875 | } else if (string_match(optname, "config") || opt == 'f') { |
4876 | /* This is handled in set_options() thus silent skip. */ | |
4877 | goto end; | |
4878 | } else { | |
26296c48 JG |
4879 | /* Unknown option or other error. |
4880 | * Error is printed by getopt, just return */ | |
4881 | ret = -1; | |
4882 | } | |
4883 | ||
f3dd7ce7 | 4884 | end: |
c5d350b2 JG |
4885 | if (ret == -EINVAL) { |
4886 | const char *opt_name = "unknown"; | |
4887 | int i; | |
4888 | ||
4889 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
4890 | i++) { | |
4891 | if (opt == long_options[i].val) { | |
4892 | opt_name = long_options[i].name; | |
4893 | break; | |
4894 | } | |
4895 | } | |
4896 | ||
4897 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
4898 | opt_name); | |
4899 | } | |
f3dd7ce7 | 4900 | |
26296c48 JG |
4901 | return ret; |
4902 | } | |
4903 | ||
4904 | /* | |
4905 | * config_entry_handler_cb used to handle options read from a config file. | |
4906 | * See config_entry_handler_cb comment in common/config/config.h for the | |
4907 | * return value conventions. | |
4908 | */ | |
4909 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
4910 | { | |
4911 | int ret = 0, i; | |
4912 | ||
4913 | if (!entry || !entry->name || !entry->value) { | |
4914 | ret = -EINVAL; | |
4915 | goto end; | |
4916 | } | |
4917 | ||
4918 | /* Check if the option is to be ignored */ | |
4919 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
4920 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
4921 | goto end; | |
4922 | } | |
4923 | } | |
4924 | ||
4925 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
4926 | i++) { | |
4927 | ||
4928 | /* Ignore if not fully matched. */ | |
4929 | if (strcmp(entry->name, long_options[i].name)) { | |
4930 | continue; | |
4931 | } | |
4932 | ||
4933 | /* | |
4934 | * If the option takes no argument on the command line, we have to | |
4935 | * check if the value is "true". We support non-zero numeric values, | |
4936 | * true, on and yes. | |
4937 | */ | |
4938 | if (!long_options[i].has_arg) { | |
4939 | ret = config_parse_value(entry->value); | |
4940 | if (ret <= 0) { | |
4941 | if (ret) { | |
4942 | WARN("Invalid configuration value \"%s\" for option %s", | |
4943 | entry->value, entry->name); | |
4944 | } | |
4945 | /* False, skip boolean config option. */ | |
4946 | goto end; | |
4d076222 | 4947 | } |
26296c48 JG |
4948 | } |
4949 | ||
4950 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
4951 | goto end; | |
4952 | } | |
4953 | ||
4954 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
4955 | ||
4956 | end: | |
4957 | return ret; | |
4958 | } | |
4959 | ||
4960 | /* | |
4961 | * daemon configuration loading and argument parsing | |
4962 | */ | |
4963 | static int set_options(int argc, char **argv) | |
4964 | { | |
4965 | int ret = 0, c = 0, option_index = 0; | |
4966 | int orig_optopt = optopt, orig_optind = optind; | |
4967 | char *optstring; | |
4968 | const char *config_path = NULL; | |
4969 | ||
4970 | optstring = utils_generate_optstring(long_options, | |
4971 | sizeof(long_options) / sizeof(struct option)); | |
4972 | if (!optstring) { | |
4973 | ret = -ENOMEM; | |
4974 | goto end; | |
4975 | } | |
4976 | ||
4977 | /* Check for the --config option */ | |
4978 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
4979 | &option_index)) != -1) { | |
4980 | if (c == '?') { | |
4981 | ret = -EINVAL; | |
4982 | goto end; | |
4983 | } else if (c != 'f') { | |
4984 | /* if not equal to --config option. */ | |
4985 | continue; | |
4986 | } | |
4987 | ||
e8fa9fb0 MD |
4988 | if (lttng_is_setuid_setgid()) { |
4989 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4990 | "-f, --config"); | |
4991 | } else { | |
4992 | config_path = utils_expand_path(optarg); | |
4993 | if (!config_path) { | |
4994 | ERR("Failed to resolve path: %s", optarg); | |
4995 | } | |
26296c48 JG |
4996 | } |
4997 | } | |
4998 | ||
4999 | ret = config_get_section_entries(config_path, config_section_name, | |
5000 | config_entry_handler, NULL); | |
5001 | if (ret) { | |
5002 | if (ret > 0) { | |
5003 | ERR("Invalid configuration option at line %i", ret); | |
5004 | ret = -1; | |
5005 | } | |
5006 | goto end; | |
5007 | } | |
5008 | ||
5009 | /* Reset getopt's global state */ | |
5010 | optopt = orig_optopt; | |
5011 | optind = orig_optind; | |
5012 | while (1) { | |
c0232ea5 JG |
5013 | option_index = -1; |
5014 | /* | |
5015 | * getopt_long() will not set option_index if it encounters a | |
5016 | * short option. | |
5017 | */ | |
5018 | c = getopt_long(argc, argv, optstring, long_options, | |
5019 | &option_index); | |
26296c48 | 5020 | if (c == -1) { |
4d076222 DG |
5021 | break; |
5022 | } | |
26296c48 | 5023 | |
c0232ea5 JG |
5024 | /* |
5025 | * Pass NULL as the long option name if popt left the index | |
5026 | * unset. | |
5027 | */ | |
5028 | ret = set_option(c, optarg, | |
5029 | option_index < 0 ? NULL : | |
5030 | long_options[option_index].name); | |
26296c48 JG |
5031 | if (ret < 0) { |
5032 | break; | |
fac6795d DG |
5033 | } |
5034 | } | |
5035 | ||
26296c48 JG |
5036 | end: |
5037 | free(optstring); | |
5038 | return ret; | |
fac6795d DG |
5039 | } |
5040 | ||
5041 | /* | |
d063d709 | 5042 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
5043 | * apps_sock - The communication socket for all UST apps. |
5044 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 5045 | */ |
cf3af59e | 5046 | static int init_daemon_socket(void) |
fac6795d DG |
5047 | { |
5048 | int ret = 0; | |
5049 | mode_t old_umask; | |
5050 | ||
5051 | old_umask = umask(0); | |
5052 | ||
5053 | /* Create client tool unix socket */ | |
d6f42150 DG |
5054 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
5055 | if (client_sock < 0) { | |
5056 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
5057 | ret = -1; |
5058 | goto end; | |
5059 | } | |
5060 | ||
b662582b DG |
5061 | /* Set the cloexec flag */ |
5062 | ret = utils_set_fd_cloexec(client_sock); | |
5063 | if (ret < 0) { | |
5064 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
5065 | "Continuing but note that the consumer daemon will have a " | |
5066 | "reference to this socket on exec()", client_sock); | |
5067 | } | |
5068 | ||
fac6795d DG |
5069 | /* File permission MUST be 660 */ |
5070 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
5071 | if (ret < 0) { | |
d6f42150 | 5072 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 5073 | PERROR("chmod"); |
fac6795d DG |
5074 | goto end; |
5075 | } | |
5076 | ||
5077 | /* Create the application unix socket */ | |
d6f42150 DG |
5078 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
5079 | if (apps_sock < 0) { | |
5080 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
5081 | ret = -1; |
5082 | goto end; | |
5083 | } | |
5084 | ||
b662582b DG |
5085 | /* Set the cloexec flag */ |
5086 | ret = utils_set_fd_cloexec(apps_sock); | |
5087 | if (ret < 0) { | |
5088 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
5089 | "Continuing but note that the consumer daemon will have a " | |
5090 | "reference to this socket on exec()", apps_sock); | |
5091 | } | |
5092 | ||
d6f42150 | 5093 | /* File permission MUST be 666 */ |
54d01ffb DG |
5094 | ret = chmod(apps_unix_sock_path, |
5095 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 5096 | if (ret < 0) { |
d6f42150 | 5097 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 5098 | PERROR("chmod"); |
fac6795d DG |
5099 | goto end; |
5100 | } | |
5101 | ||
b662582b DG |
5102 | DBG3("Session daemon client socket %d and application socket %d created", |
5103 | client_sock, apps_sock); | |
5104 | ||
fac6795d DG |
5105 | end: |
5106 | umask(old_umask); | |
5107 | return ret; | |
5108 | } | |
5109 | ||
5110 | /* | |
54d01ffb DG |
5111 | * Check if the global socket is available, and if a daemon is answering at the |
5112 | * other side. If yes, error is returned. | |
fac6795d | 5113 | */ |
cf3af59e | 5114 | static int check_existing_daemon(void) |
fac6795d | 5115 | { |
7d8234d9 | 5116 | /* Is there anybody out there ? */ |
099e26bd | 5117 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 5118 | return -EEXIST; |
099e26bd | 5119 | } |
b09c7c76 DG |
5120 | |
5121 | return 0; | |
fac6795d DG |
5122 | } |
5123 | ||
fac6795d | 5124 | /* |
d063d709 | 5125 | * Set the tracing group gid onto the client socket. |
5e16da05 | 5126 | * |
d063d709 | 5127 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 5128 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 5129 | */ |
be040666 | 5130 | static int set_permissions(char *rundir) |
fac6795d DG |
5131 | { |
5132 | int ret; | |
996b65c8 | 5133 | gid_t gid; |
fac6795d | 5134 | |
6c71277b | 5135 | gid = utils_get_group_id(tracing_group_name); |
fac6795d | 5136 | |
d6f42150 | 5137 | /* Set lttng run dir */ |
be040666 | 5138 | ret = chown(rundir, 0, gid); |
d6f42150 | 5139 | if (ret < 0) { |
be040666 | 5140 | ERR("Unable to set group on %s", rundir); |
76d7553f | 5141 | PERROR("chown"); |
d6f42150 DG |
5142 | } |
5143 | ||
6c71277b MD |
5144 | /* |
5145 | * Ensure all applications and tracing group can search the run | |
5146 | * dir. Allow everyone to read the directory, since it does not | |
5147 | * buy us anything to hide its content. | |
5148 | */ | |
5149 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
5150 | if (ret < 0) { |
5151 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 5152 | PERROR("chmod"); |
d1613cf5 JN |
5153 | } |
5154 | ||
d6f42150 | 5155 | /* lttng client socket path */ |
996b65c8 | 5156 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 5157 | if (ret < 0) { |
d6f42150 | 5158 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 5159 | PERROR("chown"); |
d6f42150 DG |
5160 | } |
5161 | ||
3bd1e081 | 5162 | /* kconsumer error socket path */ |
6c71277b | 5163 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 5164 | if (ret < 0) { |
3bd1e081 | 5165 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 5166 | PERROR("chown"); |
3bd1e081 MD |
5167 | } |
5168 | ||
7753dea8 | 5169 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 5170 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
5171 | if (ret < 0) { |
5172 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 5173 | PERROR("chown"); |
7753dea8 MD |
5174 | } |
5175 | ||
5176 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 5177 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 5178 | if (ret < 0) { |
7753dea8 | 5179 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 5180 | PERROR("chown"); |
fac6795d DG |
5181 | } |
5182 | ||
d6f42150 | 5183 | DBG("All permissions are set"); |
e07ae692 | 5184 | |
fac6795d DG |
5185 | return ret; |
5186 | } | |
5187 | ||
d6f42150 | 5188 | /* |
d063d709 | 5189 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 5190 | */ |
67e40797 | 5191 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
5192 | { |
5193 | int ret; | |
5194 | ||
67e40797 DG |
5195 | DBG3("Creating LTTng run directory: %s", rundir); |
5196 | ||
d1613cf5 | 5197 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 5198 | if (ret < 0) { |
b1f11e69 | 5199 | if (errno != EEXIST) { |
67e40797 | 5200 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
5201 | goto error; |
5202 | } else { | |
5203 | ret = 0; | |
5204 | } | |
d6f42150 DG |
5205 | } |
5206 | ||
5207 | error: | |
5208 | return ret; | |
5209 | } | |
5210 | ||
5211 | /* | |
d063d709 DG |
5212 | * Setup sockets and directory needed by the kconsumerd communication with the |
5213 | * session daemon. | |
d6f42150 | 5214 | */ |
67e40797 DG |
5215 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
5216 | const char *rundir) | |
d6f42150 DG |
5217 | { |
5218 | int ret; | |
67e40797 | 5219 | char path[PATH_MAX]; |
d6f42150 | 5220 | |
6c71277b | 5221 | switch (consumer_data->type) { |
7753dea8 | 5222 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 5223 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
5224 | break; |
5225 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 5226 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
5227 | break; |
5228 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 5229 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
5230 | break; |
5231 | default: | |
5232 | ERR("Consumer type unknown"); | |
5233 | ret = -EINVAL; | |
5234 | goto error; | |
d6f42150 DG |
5235 | } |
5236 | ||
67e40797 DG |
5237 | DBG2("Creating consumer directory: %s", path); |
5238 | ||
6c71277b | 5239 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
d6f42150 | 5240 | if (ret < 0) { |
6beb2242 | 5241 | if (errno != EEXIST) { |
f11e84c2 | 5242 | PERROR("mkdir"); |
3bd1e081 | 5243 | ERR("Failed to create %s", path); |
6beb2242 DG |
5244 | goto error; |
5245 | } | |
f11e84c2 | 5246 | ret = -1; |
d6f42150 | 5247 | } |
6c71277b MD |
5248 | if (is_root) { |
5249 | ret = chown(path, 0, utils_get_group_id(tracing_group_name)); | |
5250 | if (ret < 0) { | |
5251 | ERR("Unable to set group on %s", path); | |
5252 | PERROR("chown"); | |
5253 | goto error; | |
5254 | } | |
5255 | } | |
d6f42150 DG |
5256 | |
5257 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
5258 | consumer_data->err_sock = |
5259 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
5260 | if (consumer_data->err_sock < 0) { | |
5261 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
5262 | ret = -1; |
5263 | goto error; | |
5264 | } | |
5265 | ||
a24f05ab MD |
5266 | /* |
5267 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
5268 | * show must go on. | |
5269 | */ | |
5270 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
5271 | if (ret < 0) { | |
5272 | PERROR("utils_set_fd_cloexec"); | |
5273 | /* continue anyway */ | |
5274 | } | |
5275 | ||
d6f42150 | 5276 | /* File permission MUST be 660 */ |
3bd1e081 | 5277 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 5278 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 5279 | if (ret < 0) { |
3bd1e081 | 5280 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 5281 | PERROR("chmod"); |
d6f42150 DG |
5282 | goto error; |
5283 | } | |
5284 | ||
5285 | error: | |
5286 | return ret; | |
5287 | } | |
5288 | ||
fac6795d | 5289 | /* |
d063d709 | 5290 | * Signal handler for the daemon |
cf3af59e | 5291 | * |
54d01ffb DG |
5292 | * Simply stop all worker threads, leaving main() return gracefully after |
5293 | * joining all threads and calling cleanup(). | |
fac6795d DG |
5294 | */ |
5295 | static void sighandler(int sig) | |
5296 | { | |
5297 | switch (sig) { | |
cf3af59e | 5298 | case SIGPIPE: |
af87c45a | 5299 | DBG("SIGPIPE caught"); |
cf3af59e MD |
5300 | return; |
5301 | case SIGINT: | |
af87c45a | 5302 | DBG("SIGINT caught"); |
cf3af59e MD |
5303 | stop_threads(); |
5304 | break; | |
5305 | case SIGTERM: | |
af87c45a | 5306 | DBG("SIGTERM caught"); |
cf3af59e MD |
5307 | stop_threads(); |
5308 | break; | |
0bb7724a DG |
5309 | case SIGUSR1: |
5310 | CMM_STORE_SHARED(recv_child_signal, 1); | |
5311 | break; | |
cf3af59e MD |
5312 | default: |
5313 | break; | |
fac6795d | 5314 | } |
fac6795d DG |
5315 | } |
5316 | ||
5317 | /* | |
d063d709 | 5318 | * Setup signal handler for : |
1d4b027a | 5319 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 5320 | */ |
1d4b027a | 5321 | static int set_signal_handler(void) |
fac6795d | 5322 | { |
1d4b027a DG |
5323 | int ret = 0; |
5324 | struct sigaction sa; | |
5325 | sigset_t sigset; | |
fac6795d | 5326 | |
1d4b027a | 5327 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 5328 | PERROR("sigemptyset"); |
1d4b027a DG |
5329 | return ret; |
5330 | } | |
d6f42150 | 5331 | |
1d4b027a DG |
5332 | sa.sa_handler = sighandler; |
5333 | sa.sa_mask = sigset; | |
5334 | sa.sa_flags = 0; | |
5335 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 5336 | PERROR("sigaction"); |
1d4b027a | 5337 | return ret; |
d6f42150 DG |
5338 | } |
5339 | ||
1d4b027a | 5340 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 5341 | PERROR("sigaction"); |
1d4b027a | 5342 | return ret; |
d6f42150 | 5343 | } |
aaf26714 | 5344 | |
1d4b027a | 5345 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 5346 | PERROR("sigaction"); |
1d4b027a | 5347 | return ret; |
8c0faa1d DG |
5348 | } |
5349 | ||
0bb7724a DG |
5350 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
5351 | PERROR("sigaction"); | |
5352 | return ret; | |
5353 | } | |
5354 | ||
5355 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
5356 | |
5357 | return ret; | |
fac6795d DG |
5358 | } |
5359 | ||
f3ed775e | 5360 | /* |
d063d709 DG |
5361 | * Set open files limit to unlimited. This daemon can open a large number of |
5362 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
5363 | */ |
5364 | static void set_ulimit(void) | |
5365 | { | |
5366 | int ret; | |
5367 | struct rlimit lim; | |
5368 | ||
a88df331 | 5369 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
5370 | lim.rlim_cur = 65535; |
5371 | lim.rlim_max = 65535; | |
5372 | ||
5373 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
5374 | if (ret < 0) { | |
76d7553f | 5375 | PERROR("failed to set open files limit"); |
f3ed775e DG |
5376 | } |
5377 | } | |
5378 | ||
35f90c40 DG |
5379 | /* |
5380 | * Write pidfile using the rundir and opt_pidfile. | |
5381 | */ | |
4a15001e | 5382 | static int write_pidfile(void) |
35f90c40 DG |
5383 | { |
5384 | int ret; | |
5385 | char pidfile_path[PATH_MAX]; | |
5386 | ||
5387 | assert(rundir); | |
5388 | ||
5389 | if (opt_pidfile) { | |
5390 | strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path)); | |
5391 | } else { | |
5392 | /* Build pidfile path from rundir and opt_pidfile. */ | |
5393 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
5394 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
5395 | if (ret < 0) { | |
5396 | PERROR("snprintf pidfile path"); | |
5397 | goto error; | |
5398 | } | |
5399 | } | |
5400 | ||
5401 | /* | |
4a15001e | 5402 | * Create pid file in rundir. |
35f90c40 | 5403 | */ |
4a15001e | 5404 | ret = utils_create_pid_file(getpid(), pidfile_path); |
35f90c40 | 5405 | error: |
4a15001e | 5406 | return ret; |
35f90c40 DG |
5407 | } |
5408 | ||
c9cb3e7d JG |
5409 | /* |
5410 | * Create lockfile using the rundir and return its fd. | |
5411 | */ | |
5412 | static int create_lockfile(void) | |
5413 | { | |
5414 | int ret; | |
5415 | char lockfile_path[PATH_MAX]; | |
5416 | ||
5417 | ret = generate_lock_file_path(lockfile_path, sizeof(lockfile_path)); | |
5418 | if (ret < 0) { | |
5419 | goto error; | |
5420 | } | |
5421 | ||
5422 | ret = utils_create_lock_file(lockfile_path); | |
5423 | error: | |
5424 | return ret; | |
5425 | } | |
5426 | ||
cd9290dd | 5427 | /* |
022d91ba | 5428 | * Write agent TCP port using the rundir. |
cd9290dd | 5429 | */ |
4a15001e | 5430 | static int write_agent_port(void) |
cd9290dd DG |
5431 | { |
5432 | int ret; | |
5433 | char path[PATH_MAX]; | |
5434 | ||
5435 | assert(rundir); | |
5436 | ||
5437 | ret = snprintf(path, sizeof(path), "%s/" | |
022d91ba | 5438 | DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE, rundir); |
cd9290dd | 5439 | if (ret < 0) { |
022d91ba | 5440 | PERROR("snprintf agent port path"); |
cd9290dd DG |
5441 | goto error; |
5442 | } | |
5443 | ||
5444 | /* | |
4a15001e | 5445 | * Create TCP agent port file in rundir. |
cd9290dd | 5446 | */ |
4a15001e | 5447 | ret = utils_create_pid_file(agent_tcp_port, path); |
cd9290dd DG |
5448 | |
5449 | error: | |
4a15001e | 5450 | return ret; |
ef367a93 JG |
5451 | } |
5452 | ||
fac6795d DG |
5453 | /* |
5454 | * main | |
5455 | */ | |
5456 | int main(int argc, char **argv) | |
5457 | { | |
4a15001e | 5458 | int ret = 0, retval = 0; |
fac6795d | 5459 | void *status; |
ae9e45b3 | 5460 | const char *home_path, *env_app_timeout; |
fac6795d | 5461 | |
335a95b7 MD |
5462 | init_kernel_workarounds(); |
5463 | ||
f6a9efaa DG |
5464 | rcu_register_thread(); |
5465 | ||
4a15001e MD |
5466 | if (set_signal_handler()) { |
5467 | retval = -1; | |
5468 | goto exit_set_signal_handler; | |
0bb7724a DG |
5469 | } |
5470 | ||
7753dea8 | 5471 | setup_consumerd_path(); |
fb09408a | 5472 | |
12744796 DG |
5473 | page_size = sysconf(_SC_PAGESIZE); |
5474 | if (page_size < 0) { | |
5475 | PERROR("sysconf _SC_PAGESIZE"); | |
5476 | page_size = LONG_MAX; | |
5477 | WARN("Fallback page size to %ld", page_size); | |
5478 | } | |
5479 | ||
4a15001e MD |
5480 | /* |
5481 | * Parse arguments and load the daemon configuration file. | |
5482 | * | |
5483 | * We have an exit_options exit path to free memory reserved by | |
5484 | * set_options. This is needed because the rest of sessiond_cleanup() | |
5485 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
5486 | * depends on set_options. | |
5487 | */ | |
fac6795d | 5488 | progname = argv[0]; |
4a15001e MD |
5489 | if (set_options(argc, argv)) { |
5490 | retval = -1; | |
5491 | goto exit_options; | |
fac6795d DG |
5492 | } |
5493 | ||
5494 | /* Daemonize */ | |
72dd7491 | 5495 | if (opt_daemon || opt_background) { |
ceed52b5 MD |
5496 | int i; |
5497 | ||
72dd7491 MD |
5498 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
5499 | !opt_background); | |
53094c05 | 5500 | if (ret < 0) { |
4a15001e MD |
5501 | retval = -1; |
5502 | goto exit_options; | |
53094c05 | 5503 | } |
0bb7724a | 5504 | |
ceed52b5 | 5505 | /* |
0bb7724a | 5506 | * We are in the child. Make sure all other file descriptors are |
4a15001e MD |
5507 | * closed, in case we are called with more opened file |
5508 | * descriptors than the standard ones. | |
ceed52b5 MD |
5509 | */ |
5510 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
5511 | (void) close(i); | |
5512 | } | |
5513 | } | |
5514 | ||
7567352f MD |
5515 | if (run_as_create_worker(argv[0]) < 0) { |
5516 | goto exit_create_run_as_worker_cleanup; | |
5517 | } | |
5518 | ||
4a15001e MD |
5519 | /* |
5520 | * Starting from here, we can create threads. This needs to be after | |
5521 | * lttng_daemonize due to RCU. | |
5522 | */ | |
5523 | ||
5524 | /* | |
5525 | * Initialize the health check subsystem. This call should set the | |
5526 | * appropriate time values. | |
5527 | */ | |
5528 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
5529 | if (!health_sessiond) { | |
5530 | PERROR("health_app_create error"); | |
5531 | retval = -1; | |
5532 | goto exit_health_sessiond_cleanup; | |
5533 | } | |
5534 | ||
5535 | if (init_ht_cleanup_quit_pipe()) { | |
5536 | retval = -1; | |
5537 | goto exit_ht_cleanup_quit_pipe; | |
5538 | } | |
5539 | ||
5540 | /* Setup the thread ht_cleanup communication pipe. */ | |
5541 | if (utils_create_pipe_cloexec(ht_cleanup_pipe)) { | |
5542 | retval = -1; | |
5543 | goto exit_ht_cleanup_pipe; | |
5544 | } | |
5545 | ||
25b397f9 MD |
5546 | /* Set up max poll set size */ |
5547 | if (lttng_poll_set_max_size()) { | |
5548 | retval = -1; | |
5549 | goto exit_set_max_size; | |
5550 | } | |
5551 | ||
4a15001e MD |
5552 | /* Create thread to clean up RCU hash tables */ |
5553 | ret = pthread_create(&ht_cleanup_thread, NULL, | |
5554 | thread_ht_cleanup, (void *) NULL); | |
5555 | if (ret) { | |
5556 | errno = ret; | |
5557 | PERROR("pthread_create ht_cleanup"); | |
5558 | retval = -1; | |
5559 | goto exit_ht_cleanup; | |
5560 | } | |
5561 | ||
ceed52b5 | 5562 | /* Create thread quit pipe */ |
4a15001e MD |
5563 | if (init_thread_quit_pipe()) { |
5564 | retval = -1; | |
5565 | goto exit_init_data; | |
fac6795d DG |
5566 | } |
5567 | ||
5568 | /* Check if daemon is UID = 0 */ | |
5569 | is_root = !getuid(); | |
5570 | ||
fac6795d | 5571 | if (is_root) { |
990570ed | 5572 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
4ea184d1 | 5573 | if (!rundir) { |
4a15001e MD |
5574 | retval = -1; |
5575 | goto exit_init_data; | |
4ea184d1 | 5576 | } |
67e40797 DG |
5577 | |
5578 | /* Create global run dir with root access */ | |
4a15001e MD |
5579 | if (create_lttng_rundir(rundir)) { |
5580 | retval = -1; | |
5581 | goto exit_init_data; | |
d6f42150 DG |
5582 | } |
5583 | ||
fac6795d | 5584 | if (strlen(apps_unix_sock_path) == 0) { |
4a15001e | 5585 | ret = snprintf(apps_unix_sock_path, PATH_MAX, |
d6f42150 | 5586 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); |
4a15001e MD |
5587 | if (ret < 0) { |
5588 | retval = -1; | |
5589 | goto exit_init_data; | |
5590 | } | |
fac6795d DG |
5591 | } |
5592 | ||
5593 | if (strlen(client_unix_sock_path) == 0) { | |
4a15001e | 5594 | ret = snprintf(client_unix_sock_path, PATH_MAX, |
d6f42150 | 5595 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); |
4a15001e MD |
5596 | if (ret < 0) { |
5597 | retval = -1; | |
5598 | goto exit_init_data; | |
5599 | } | |
d6f42150 | 5600 | } |
0fdd1e2c DG |
5601 | |
5602 | /* Set global SHM for ust */ | |
5603 | if (strlen(wait_shm_path) == 0) { | |
4a15001e | 5604 | ret = snprintf(wait_shm_path, PATH_MAX, |
0fdd1e2c | 5605 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); |
4a15001e MD |
5606 | if (ret < 0) { |
5607 | retval = -1; | |
5608 | goto exit_init_data; | |
5609 | } | |
0fdd1e2c | 5610 | } |
67e40797 | 5611 | |
44a5e5eb | 5612 | if (strlen(health_unix_sock_path) == 0) { |
4a15001e MD |
5613 | ret = snprintf(health_unix_sock_path, |
5614 | sizeof(health_unix_sock_path), | |
44a5e5eb | 5615 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); |
4a15001e MD |
5616 | if (ret < 0) { |
5617 | retval = -1; | |
5618 | goto exit_init_data; | |
5619 | } | |
44a5e5eb DG |
5620 | } |
5621 | ||
67e40797 | 5622 | /* Setup kernel consumerd path */ |
4a15001e | 5623 | ret = snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5624 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5625 | if (ret < 0) { |
5626 | retval = -1; | |
5627 | goto exit_init_data; | |
5628 | } | |
5629 | ret = snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5630 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5631 | if (ret < 0) { |
5632 | retval = -1; | |
5633 | goto exit_init_data; | |
5634 | } | |
67e40797 DG |
5635 | |
5636 | DBG2("Kernel consumer err path: %s", | |
5637 | kconsumer_data.err_unix_sock_path); | |
5638 | DBG2("Kernel consumer cmd path: %s", | |
5639 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 5640 | } else { |
feb0f3e5 | 5641 | home_path = utils_get_home_dir(); |
b082db07 | 5642 | if (home_path == NULL) { |
273ea72c DG |
5643 | /* TODO: Add --socket PATH option */ |
5644 | ERR("Can't get HOME directory for sockets creation."); | |
4a15001e MD |
5645 | retval = -1; |
5646 | goto exit_init_data; | |
b082db07 DG |
5647 | } |
5648 | ||
67e40797 DG |
5649 | /* |
5650 | * Create rundir from home path. This will create something like | |
5651 | * $HOME/.lttng | |
5652 | */ | |
990570ed | 5653 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 | 5654 | if (ret < 0) { |
4a15001e MD |
5655 | retval = -1; |
5656 | goto exit_init_data; | |
67e40797 DG |
5657 | } |
5658 | ||
4a15001e MD |
5659 | if (create_lttng_rundir(rundir)) { |
5660 | retval = -1; | |
5661 | goto exit_init_data; | |
67e40797 DG |
5662 | } |
5663 | ||
fac6795d | 5664 | if (strlen(apps_unix_sock_path) == 0) { |
4a15001e MD |
5665 | ret = snprintf(apps_unix_sock_path, PATH_MAX, |
5666 | DEFAULT_HOME_APPS_UNIX_SOCK, | |
5667 | home_path); | |
5668 | if (ret < 0) { | |
5669 | retval = -1; | |
5670 | goto exit_init_data; | |
5671 | } | |
fac6795d DG |
5672 | } |
5673 | ||
5674 | /* Set the cli tool unix socket path */ | |
5675 | if (strlen(client_unix_sock_path) == 0) { | |
4a15001e MD |
5676 | ret = snprintf(client_unix_sock_path, PATH_MAX, |
5677 | DEFAULT_HOME_CLIENT_UNIX_SOCK, | |
5678 | home_path); | |
5679 | if (ret < 0) { | |
5680 | retval = -1; | |
5681 | goto exit_init_data; | |
5682 | } | |
fac6795d | 5683 | } |
0fdd1e2c DG |
5684 | |
5685 | /* Set global SHM for ust */ | |
5686 | if (strlen(wait_shm_path) == 0) { | |
4a15001e MD |
5687 | ret = snprintf(wait_shm_path, PATH_MAX, |
5688 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, | |
5689 | getuid()); | |
5690 | if (ret < 0) { | |
5691 | retval = -1; | |
5692 | goto exit_init_data; | |
5693 | } | |
0fdd1e2c | 5694 | } |
44a5e5eb DG |
5695 | |
5696 | /* Set health check Unix path */ | |
5697 | if (strlen(health_unix_sock_path) == 0) { | |
4a15001e MD |
5698 | ret = snprintf(health_unix_sock_path, |
5699 | sizeof(health_unix_sock_path), | |
5700 | DEFAULT_HOME_HEALTH_UNIX_SOCK, | |
5701 | home_path); | |
5702 | if (ret < 0) { | |
5703 | retval = -1; | |
5704 | goto exit_init_data; | |
5705 | } | |
44a5e5eb | 5706 | } |
fac6795d DG |
5707 | } |
5708 | ||
c9cb3e7d JG |
5709 | lockfile_fd = create_lockfile(); |
5710 | if (lockfile_fd < 0) { | |
4a15001e MD |
5711 | retval = -1; |
5712 | goto exit_init_data; | |
c9cb3e7d JG |
5713 | } |
5714 | ||
5c827ce0 DG |
5715 | /* Set consumer initial state */ |
5716 | kernel_consumerd_state = CONSUMER_STOPPED; | |
5717 | ust_consumerd_state = CONSUMER_STOPPED; | |
5718 | ||
847177cd DG |
5719 | DBG("Client socket path %s", client_unix_sock_path); |
5720 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 5721 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
5722 | DBG("LTTng run directory path: %s", rundir); |
5723 | ||
5724 | /* 32 bits consumerd path setup */ | |
4a15001e | 5725 | ret = snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5726 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5727 | if (ret < 0) { |
5728 | PERROR("snprintf 32-bit consumer error socket path"); | |
5729 | retval = -1; | |
5730 | goto exit_init_data; | |
5731 | } | |
5732 | ret = snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5733 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5734 | if (ret < 0) { |
5735 | PERROR("snprintf 32-bit consumer command socket path"); | |
5736 | retval = -1; | |
5737 | goto exit_init_data; | |
5738 | } | |
67e40797 DG |
5739 | |
5740 | DBG2("UST consumer 32 bits err path: %s", | |
5741 | ustconsumer32_data.err_unix_sock_path); | |
5742 | DBG2("UST consumer 32 bits cmd path: %s", | |
5743 | ustconsumer32_data.cmd_unix_sock_path); | |
5744 | ||
5745 | /* 64 bits consumerd path setup */ | |
4a15001e | 5746 | ret = snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5747 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5748 | if (ret < 0) { |
5749 | PERROR("snprintf 64-bit consumer error socket path"); | |
5750 | retval = -1; | |
5751 | goto exit_init_data; | |
5752 | } | |
5753 | ret = snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5754 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5755 | if (ret < 0) { |
5756 | PERROR("snprintf 64-bit consumer command socket path"); | |
5757 | retval = -1; | |
5758 | goto exit_init_data; | |
5759 | } | |
67e40797 DG |
5760 | |
5761 | DBG2("UST consumer 64 bits err path: %s", | |
5762 | ustconsumer64_data.err_unix_sock_path); | |
5763 | DBG2("UST consumer 64 bits cmd path: %s", | |
5764 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 5765 | |
273ea72c | 5766 | /* |
7d8234d9 | 5767 | * See if daemon already exist. |
fac6795d | 5768 | */ |
4a15001e | 5769 | if (check_existing_daemon()) { |
75462a81 | 5770 | ERR("Already running daemon.\n"); |
273ea72c | 5771 | /* |
cf3af59e MD |
5772 | * We do not goto exit because we must not cleanup() |
5773 | * because a daemon is already running. | |
ab118b20 | 5774 | */ |
4a15001e MD |
5775 | retval = -1; |
5776 | goto exit_init_data; | |
a88df331 DG |
5777 | } |
5778 | ||
1427f9b2 DG |
5779 | /* |
5780 | * Init UST app hash table. Alloc hash table before this point since | |
5781 | * cleanup() can get called after that point. | |
5782 | */ | |
4a15001e | 5783 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 5784 | ERR("Failed to allocate UST app hash table"); |
4a15001e MD |
5785 | retval = -1; |
5786 | goto exit_init_data; | |
5787 | } | |
1427f9b2 | 5788 | |
6a4e4039 JG |
5789 | /* |
5790 | * Initialize agent app hash table. We allocate the hash table here | |
5791 | * since cleanup() can get called after this point. | |
5792 | */ | |
5793 | if (agent_app_ht_alloc()) { | |
5794 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e MD |
5795 | retval = -1; |
5796 | goto exit_init_data; | |
f20baf8e DG |
5797 | } |
5798 | ||
a88df331 DG |
5799 | /* |
5800 | * These actions must be executed as root. We do that *after* setting up | |
5801 | * the sockets path because we MUST make the check for another daemon using | |
5802 | * those paths *before* trying to set the kernel consumer sockets and init | |
5803 | * kernel tracer. | |
5804 | */ | |
5805 | if (is_root) { | |
4a15001e MD |
5806 | if (set_consumer_sockets(&kconsumer_data, rundir)) { |
5807 | retval = -1; | |
5808 | goto exit_init_data; | |
7753dea8 MD |
5809 | } |
5810 | ||
a88df331 | 5811 | /* Setup kernel tracer */ |
4fba7219 DG |
5812 | if (!opt_no_kernel) { |
5813 | init_kernel_tracer(); | |
89588270 DG |
5814 | if (kernel_tracer_fd >= 0) { |
5815 | ret = syscall_init_table(); | |
5816 | if (ret < 0) { | |
4a15001e MD |
5817 | ERR("Unable to populate syscall table. " |
5818 | "Syscall tracing won't work " | |
5819 | "for this session daemon."); | |
89588270 | 5820 | } |
834978fd | 5821 | } |
4fba7219 | 5822 | } |
a88df331 DG |
5823 | |
5824 | /* Set ulimit for open files */ | |
5825 | set_ulimit(); | |
fac6795d | 5826 | } |
4063050c MD |
5827 | /* init lttng_fd tracking must be done after set_ulimit. */ |
5828 | lttng_fd_init(); | |
fac6795d | 5829 | |
4a15001e MD |
5830 | if (set_consumer_sockets(&ustconsumer64_data, rundir)) { |
5831 | retval = -1; | |
5832 | goto exit_init_data; | |
67e40797 DG |
5833 | } |
5834 | ||
4a15001e MD |
5835 | if (set_consumer_sockets(&ustconsumer32_data, rundir)) { |
5836 | retval = -1; | |
5837 | goto exit_init_data; | |
67e40797 DG |
5838 | } |
5839 | ||
d6f42150 | 5840 | /* Setup the needed unix socket */ |
4a15001e MD |
5841 | if (init_daemon_socket()) { |
5842 | retval = -1; | |
5843 | goto exit_init_data; | |
fac6795d DG |
5844 | } |
5845 | ||
5846 | /* Set credentials to socket */ | |
4a15001e MD |
5847 | if (is_root && set_permissions(rundir)) { |
5848 | retval = -1; | |
5849 | goto exit_init_data; | |
fac6795d DG |
5850 | } |
5851 | ||
5b8719f5 DG |
5852 | /* Get parent pid if -S, --sig-parent is specified. */ |
5853 | if (opt_sig_parent) { | |
5854 | ppid = getppid(); | |
5855 | } | |
5856 | ||
7a485870 | 5857 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 | 5858 | if (is_root && !opt_no_kernel) { |
4a15001e MD |
5859 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
5860 | retval = -1; | |
5861 | goto exit_init_data; | |
6620da75 | 5862 | } |
7a485870 DG |
5863 | } |
5864 | ||
099e26bd | 5865 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
5866 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
5867 | retval = -1; | |
5868 | goto exit_init_data; | |
099e26bd DG |
5869 | } |
5870 | ||
d0b96690 | 5871 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
5872 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
5873 | retval = -1; | |
5874 | goto exit_init_data; | |
d0b96690 DG |
5875 | } |
5876 | ||
7972aab2 DG |
5877 | /* Initialize global buffer per UID and PID registry. */ |
5878 | buffer_reg_init_uid_registry(); | |
5879 | buffer_reg_init_pid_registry(); | |
5880 | ||
099e26bd | 5881 | /* Init UST command queue. */ |
8bdee6e2 | 5882 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 5883 | |
273ea72c | 5884 | /* |
4a15001e MD |
5885 | * Get session list pointer. This pointer MUST NOT be free'd. This list |
5886 | * is statically declared in session.c | |
273ea72c | 5887 | */ |
54d01ffb | 5888 | session_list_ptr = session_get_list(); |
b5541356 | 5889 | |
2f77fc4b | 5890 | cmd_init(); |
00e2e675 | 5891 | |
ae9e45b3 DG |
5892 | /* Check for the application socket timeout env variable. */ |
5893 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
5894 | if (env_app_timeout) { | |
5895 | app_socket_timeout = atoi(env_app_timeout); | |
5896 | } else { | |
5897 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
5898 | } | |
5899 | ||
4a15001e MD |
5900 | ret = write_pidfile(); |
5901 | if (ret) { | |
5902 | ERR("Error in write_pidfile"); | |
5903 | retval = -1; | |
5904 | goto exit_init_data; | |
5905 | } | |
5906 | ret = write_agent_port(); | |
5907 | if (ret) { | |
5908 | ERR("Error in write_agent_port"); | |
5909 | retval = -1; | |
5910 | goto exit_init_data; | |
5911 | } | |
35f90c40 | 5912 | |
554831e7 MD |
5913 | /* Initialize communication library */ |
5914 | lttcomm_init(); | |
4a15001e | 5915 | /* Initialize TCP timeout values */ |
d831c249 | 5916 | lttcomm_inet_init(); |
554831e7 | 5917 | |
ef367a93 | 5918 | if (load_session_init_data(&load_info) < 0) { |
4a15001e MD |
5919 | retval = -1; |
5920 | goto exit_init_data; | |
ef367a93 JG |
5921 | } |
5922 | load_info->path = opt_load_session_path; | |
5923 | ||
d5b9fd2f | 5924 | /* Create health-check thread */ |
44a5e5eb DG |
5925 | ret = pthread_create(&health_thread, NULL, |
5926 | thread_manage_health, (void *) NULL); | |
4a15001e MD |
5927 | if (ret) { |
5928 | errno = ret; | |
44a5e5eb | 5929 | PERROR("pthread_create health"); |
4a15001e | 5930 | retval = -1; |
44a5e5eb DG |
5931 | goto exit_health; |
5932 | } | |
5933 | ||
cf3af59e | 5934 | /* Create thread to manage the client socket */ |
099e26bd DG |
5935 | ret = pthread_create(&client_thread, NULL, |
5936 | thread_manage_clients, (void *) NULL); | |
4a15001e MD |
5937 | if (ret) { |
5938 | errno = ret; | |
76d7553f | 5939 | PERROR("pthread_create clients"); |
4a15001e | 5940 | retval = -1; |
cf3af59e MD |
5941 | goto exit_client; |
5942 | } | |
fac6795d | 5943 | |
099e26bd DG |
5944 | /* Create thread to dispatch registration */ |
5945 | ret = pthread_create(&dispatch_thread, NULL, | |
5946 | thread_dispatch_ust_registration, (void *) NULL); | |
4a15001e MD |
5947 | if (ret) { |
5948 | errno = ret; | |
76d7553f | 5949 | PERROR("pthread_create dispatch"); |
4a15001e | 5950 | retval = -1; |
099e26bd DG |
5951 | goto exit_dispatch; |
5952 | } | |
5953 | ||
5954 | /* Create thread to manage application registration. */ | |
5955 | ret = pthread_create(®_apps_thread, NULL, | |
5956 | thread_registration_apps, (void *) NULL); | |
4a15001e MD |
5957 | if (ret) { |
5958 | errno = ret; | |
76d7553f | 5959 | PERROR("pthread_create registration"); |
4a15001e | 5960 | retval = -1; |
099e26bd DG |
5961 | goto exit_reg_apps; |
5962 | } | |
5963 | ||
cf3af59e | 5964 | /* Create thread to manage application socket */ |
54d01ffb DG |
5965 | ret = pthread_create(&apps_thread, NULL, |
5966 | thread_manage_apps, (void *) NULL); | |
4a15001e MD |
5967 | if (ret) { |
5968 | errno = ret; | |
d0b96690 | 5969 | PERROR("pthread_create apps"); |
4a15001e | 5970 | retval = -1; |
d0b96690 DG |
5971 | goto exit_apps; |
5972 | } | |
5973 | ||
5974 | /* Create thread to manage application notify socket */ | |
5975 | ret = pthread_create(&apps_notify_thread, NULL, | |
5976 | ust_thread_manage_notify, (void *) NULL); | |
4a15001e MD |
5977 | if (ret) { |
5978 | errno = ret; | |
f5c32ef1 | 5979 | PERROR("pthread_create notify"); |
4a15001e | 5980 | retval = -1; |
9563b0ad | 5981 | goto exit_apps_notify; |
cf3af59e | 5982 | } |
fac6795d | 5983 | |
022d91ba DG |
5984 | /* Create agent registration thread. */ |
5985 | ret = pthread_create(&agent_reg_thread, NULL, | |
5986 | agent_thread_manage_registration, (void *) NULL); | |
4a15001e MD |
5987 | if (ret) { |
5988 | errno = ret; | |
022d91ba | 5989 | PERROR("pthread_create agent"); |
4a15001e | 5990 | retval = -1; |
022d91ba | 5991 | goto exit_agent_reg; |
4d076222 DG |
5992 | } |
5993 | ||
6620da75 DG |
5994 | /* Don't start this thread if kernel tracing is not requested nor root */ |
5995 | if (is_root && !opt_no_kernel) { | |
5996 | /* Create kernel thread to manage kernel event */ | |
5997 | ret = pthread_create(&kernel_thread, NULL, | |
5998 | thread_manage_kernel, (void *) NULL); | |
4a15001e MD |
5999 | if (ret) { |
6000 | errno = ret; | |
6620da75 | 6001 | PERROR("pthread_create kernel"); |
4a15001e | 6002 | retval = -1; |
6620da75 DG |
6003 | goto exit_kernel; |
6004 | } | |
ef367a93 | 6005 | } |
7a485870 | 6006 | |
4a15001e MD |
6007 | /* Create session loading thread. */ |
6008 | ret = pthread_create(&load_session_thread, NULL, thread_load_session, | |
6009 | load_info); | |
6010 | if (ret) { | |
6011 | errno = ret; | |
6012 | PERROR("pthread_create load_session_thread"); | |
6013 | retval = -1; | |
6014 | goto exit_load_session; | |
6015 | } | |
6016 | ||
6017 | /* | |
6018 | * This is where we start awaiting program completion (e.g. through | |
6019 | * signal that asks threads to teardown). | |
6020 | */ | |
6021 | ||
6022 | ret = pthread_join(load_session_thread, &status); | |
6023 | if (ret) { | |
6024 | errno = ret; | |
6025 | PERROR("pthread_join load_session_thread"); | |
6026 | retval = -1; | |
6027 | } | |
6028 | exit_load_session: | |
ef367a93 JG |
6029 | |
6030 | if (is_root && !opt_no_kernel) { | |
6620da75 | 6031 | ret = pthread_join(kernel_thread, &status); |
4a15001e MD |
6032 | if (ret) { |
6033 | errno = ret; | |
6620da75 | 6034 | PERROR("pthread_join"); |
4a15001e | 6035 | retval = -1; |
6620da75 | 6036 | } |
fac6795d | 6037 | } |
cf3af59e | 6038 | exit_kernel: |
4a15001e | 6039 | |
022d91ba | 6040 | ret = pthread_join(agent_reg_thread, &status); |
4a15001e MD |
6041 | if (ret) { |
6042 | errno = ret; | |
022d91ba | 6043 | PERROR("pthread_join agent"); |
4a15001e | 6044 | retval = -1; |
4d076222 | 6045 | } |
022d91ba | 6046 | exit_agent_reg: |
4a15001e | 6047 | |
9563b0ad | 6048 | ret = pthread_join(apps_notify_thread, &status); |
4a15001e MD |
6049 | if (ret) { |
6050 | errno = ret; | |
9563b0ad | 6051 | PERROR("pthread_join apps notify"); |
4a15001e | 6052 | retval = -1; |
9563b0ad | 6053 | } |
9563b0ad | 6054 | exit_apps_notify: |
4a15001e | 6055 | |
cf3af59e | 6056 | ret = pthread_join(apps_thread, &status); |
4a15001e MD |
6057 | if (ret) { |
6058 | errno = ret; | |
9563b0ad | 6059 | PERROR("pthread_join apps"); |
4a15001e | 6060 | retval = -1; |
cf3af59e | 6061 | } |
cf3af59e | 6062 | exit_apps: |
4a15001e | 6063 | |
099e26bd | 6064 | ret = pthread_join(reg_apps_thread, &status); |
4a15001e MD |
6065 | if (ret) { |
6066 | errno = ret; | |
76d7553f | 6067 | PERROR("pthread_join"); |
4a15001e | 6068 | retval = -1; |
099e26bd | 6069 | } |
099e26bd | 6070 | exit_reg_apps: |
4a15001e | 6071 | |
772b8f4d MD |
6072 | /* |
6073 | * Join dispatch thread after joining reg_apps_thread to ensure | |
6074 | * we don't leak applications in the queue. | |
6075 | */ | |
099e26bd | 6076 | ret = pthread_join(dispatch_thread, &status); |
4a15001e MD |
6077 | if (ret) { |
6078 | errno = ret; | |
76d7553f | 6079 | PERROR("pthread_join"); |
4a15001e | 6080 | retval = -1; |
099e26bd | 6081 | } |
099e26bd | 6082 | exit_dispatch: |
4a15001e | 6083 | |
cf3af59e | 6084 | ret = pthread_join(client_thread, &status); |
4a15001e MD |
6085 | if (ret) { |
6086 | errno = ret; | |
76d7553f | 6087 | PERROR("pthread_join"); |
4a15001e | 6088 | retval = -1; |
cf3af59e | 6089 | } |
4a15001e | 6090 | exit_client: |
a88df331 | 6091 | |
4a15001e MD |
6092 | ret = pthread_join(health_thread, &status); |
6093 | if (ret) { | |
6094 | errno = ret; | |
6095 | PERROR("pthread_join health thread"); | |
6096 | retval = -1; | |
06f525de | 6097 | } |
4a15001e | 6098 | exit_health: |
06f525de | 6099 | |
4a15001e MD |
6100 | exit_init_data: |
6101 | /* | |
6102 | * sessiond_cleanup() is called when no other thread is running, except | |
6103 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
6104 | */ | |
6105 | rcu_thread_online(); | |
6106 | sessiond_cleanup(); | |
6107 | rcu_thread_offline(); | |
6108 | rcu_unregister_thread(); | |
06f525de | 6109 | |
4a15001e MD |
6110 | ret = notify_thread_pipe(ht_cleanup_quit_pipe[1]); |
6111 | if (ret < 0) { | |
6112 | ERR("write error on ht_cleanup quit pipe"); | |
6113 | retval = -1; | |
06f525de DG |
6114 | } |
6115 | ||
0b2dc8df | 6116 | ret = pthread_join(ht_cleanup_thread, &status); |
4a15001e MD |
6117 | if (ret) { |
6118 | errno = ret; | |
0b2dc8df | 6119 | PERROR("pthread_join ht cleanup thread"); |
4a15001e | 6120 | retval = -1; |
0b2dc8df MD |
6121 | } |
6122 | exit_ht_cleanup: | |
25b397f9 | 6123 | exit_set_max_size: |
4a15001e MD |
6124 | |
6125 | utils_close_pipe(ht_cleanup_pipe); | |
6126 | exit_ht_cleanup_pipe: | |
6127 | ||
cf3af59e | 6128 | /* |
4a15001e | 6129 | * Close the ht_cleanup quit pipe. |
cf3af59e | 6130 | */ |
4a15001e MD |
6131 | utils_close_pipe(ht_cleanup_quit_pipe); |
6132 | exit_ht_cleanup_quit_pipe: | |
6133 | ||
6134 | health_app_destroy(health_sessiond); | |
6135 | exit_health_sessiond_cleanup: | |
7567352f | 6136 | exit_create_run_as_worker_cleanup: |
4a15001e MD |
6137 | |
6138 | exit_options: | |
6139 | sessiond_cleanup_options(); | |
6140 | ||
6141 | exit_set_signal_handler: | |
0658924e MD |
6142 | /* Ensure all prior call_rcu are done. */ |
6143 | rcu_barrier(); | |
6144 | ||
4a15001e | 6145 | if (!retval) { |
cf3af59e | 6146 | exit(EXIT_SUCCESS); |
4a15001e MD |
6147 | } else { |
6148 | exit(EXIT_FAILURE); | |
67e40797 | 6149 | } |
fac6795d | 6150 | } |