Commit | Line | Data |
---|---|---|
826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
0fdd1e2c | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
26296c48 | 4 | * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 5 | * |
d14d33bf AM |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License, version 2 only, | |
8 | * as published by the Free Software Foundation. | |
91d76f53 | 9 | * |
d14d33bf AM |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
91d76f53 | 14 | * |
d14d33bf AM |
15 | * You should have received a copy of the GNU General Public License along |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
fac6795d DG |
18 | */ |
19 | ||
6c1c0768 | 20 | #define _LGPL_SOURCE |
fac6795d DG |
21 | #include <getopt.h> |
22 | #include <grp.h> | |
23 | #include <limits.h> | |
0bb7724a | 24 | #include <paths.h> |
fac6795d DG |
25 | #include <pthread.h> |
26 | #include <signal.h> | |
27 | #include <stdio.h> | |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
331744e3 | 30 | #include <inttypes.h> |
0fdd1e2c | 31 | #include <sys/mman.h> |
b73401da | 32 | #include <sys/mount.h> |
1e307fab | 33 | #include <sys/resource.h> |
fac6795d DG |
34 | #include <sys/socket.h> |
35 | #include <sys/stat.h> | |
36 | #include <sys/types.h> | |
0fdd1e2c | 37 | #include <sys/wait.h> |
5c827ce0 | 38 | #include <urcu/uatomic.h> |
fac6795d | 39 | #include <unistd.h> |
2c0353f7 | 40 | #include <ctype.h> |
fac6795d | 41 | |
990570ed | 42 | #include <common/common.h> |
d27c42b8 | 43 | #include <common/compat/socket.h> |
e8fa9fb0 | 44 | #include <common/compat/getenv.h> |
db758600 DG |
45 | #include <common/defaults.h> |
46 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 47 | #include <common/futex.h> |
00e2e675 | 48 | #include <common/relayd/relayd.h> |
81b86775 | 49 | #include <common/utils.h> |
3ccdf997 | 50 | #include <common/daemonize.h> |
f40ef1d5 | 51 | #include <common/config/session-config.h> |
fac6795d | 52 | |
10a8a223 | 53 | #include "lttng-sessiond.h" |
7972aab2 | 54 | #include "buffer-registry.h" |
54d01ffb | 55 | #include "channel.h" |
2f77fc4b | 56 | #include "cmd.h" |
00e2e675 | 57 | #include "consumer.h" |
099e26bd | 58 | #include "context.h" |
54d01ffb | 59 | #include "event.h" |
4771f025 | 60 | #include "kernel.h" |
f1e16794 | 61 | #include "kernel-consumer.h" |
096102bd | 62 | #include "modprobe.h" |
0fdd1e2c | 63 | #include "shm.h" |
1e307fab | 64 | #include "ust-ctl.h" |
00e2e675 | 65 | #include "ust-consumer.h" |
8e68d1c8 | 66 | #include "utils.h" |
4063050c | 67 | #include "fd-limit.h" |
8782cc74 | 68 | #include "health-sessiond.h" |
8ac94142 | 69 | #include "testpoint.h" |
d0b96690 | 70 | #include "ust-thread.h" |
022d91ba | 71 | #include "agent-thread.h" |
fb198a11 | 72 | #include "save.h" |
ef367a93 | 73 | #include "load-session-thread.h" |
834978fd | 74 | #include "syscall.h" |
7c1d2758 | 75 | #include "agent.h" |
fac6795d | 76 | |
ebaeda94 MD |
77 | #define CONSUMERD_FILE "lttng-consumerd" |
78 | ||
fac6795d | 79 | const char *progname; |
6c71277b | 80 | static const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
26296c48 JG |
81 | static int tracing_group_name_override; |
82 | static char *opt_pidfile; | |
5b8719f5 | 83 | static int opt_sig_parent; |
97e19046 | 84 | static int opt_verbose_consumer; |
72dd7491 | 85 | static int opt_daemon, opt_background; |
4fba7219 | 86 | static int opt_no_kernel; |
ef367a93 | 87 | static char *opt_load_session_path; |
1d4b027a | 88 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
0bb7724a | 89 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ |
67e40797 | 90 | static char *rundir; |
c9cb3e7d | 91 | static int lockfile_fd = -1; |
3bd1e081 | 92 | |
0bb7724a DG |
93 | /* Set to 1 when a SIGUSR1 signal is received. */ |
94 | static int recv_child_signal; | |
95 | ||
a23ec3a7 DG |
96 | /* |
97 | * Consumer daemon specific control data. Every value not initialized here is | |
98 | * set to 0 by the static definition. | |
99 | */ | |
3bd1e081 MD |
100 | static struct consumer_data kconsumer_data = { |
101 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
102 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
103 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
03550b58 MD |
104 | .err_sock = -1, |
105 | .cmd_sock = -1, | |
173af62f DG |
106 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
107 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
108 | .cond = PTHREAD_COND_INITIALIZER, |
109 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 110 | }; |
7753dea8 MD |
111 | static struct consumer_data ustconsumer64_data = { |
112 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
113 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
114 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
115 | .err_sock = -1, |
116 | .cmd_sock = -1, | |
173af62f DG |
117 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
118 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
119 | .cond = PTHREAD_COND_INITIALIZER, |
120 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
121 | }; |
122 | static struct consumer_data ustconsumer32_data = { | |
123 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
124 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
125 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
126 | .err_sock = -1, |
127 | .cmd_sock = -1, | |
173af62f DG |
128 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
129 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
130 | .cond = PTHREAD_COND_INITIALIZER, |
131 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
132 | }; |
133 | ||
26296c48 JG |
134 | /* Command line options */ |
135 | static const struct option long_options[] = { | |
0f5ea17c JG |
136 | { "client-sock", required_argument, 0, 'c' }, |
137 | { "apps-sock", required_argument, 0, 'a' }, | |
138 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
139 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
140 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
141 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
142 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
143 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
144 | { "consumerd32-path", required_argument, 0, '\0' }, | |
145 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
146 | { "consumerd64-path", required_argument, 0, '\0' }, | |
147 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
148 | { "daemonize", no_argument, 0, 'd' }, | |
149 | { "background", no_argument, 0, 'b' }, | |
150 | { "sig-parent", no_argument, 0, 'S' }, | |
151 | { "help", no_argument, 0, 'h' }, | |
152 | { "group", required_argument, 0, 'g' }, | |
153 | { "version", no_argument, 0, 'V' }, | |
154 | { "quiet", no_argument, 0, 'q' }, | |
155 | { "verbose", no_argument, 0, 'v' }, | |
156 | { "verbose-consumer", no_argument, 0, '\0' }, | |
157 | { "no-kernel", no_argument, 0, '\0' }, | |
158 | { "pidfile", required_argument, 0, 'p' }, | |
159 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
160 | { "config", required_argument, 0, 'f' }, | |
161 | { "load", required_argument, 0, 'l' }, | |
162 | { "kmod-probes", required_argument, 0, '\0' }, | |
163 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
26296c48 JG |
164 | { NULL, 0, 0, 0 } |
165 | }; | |
166 | ||
167 | /* Command line options to ignore from configuration file */ | |
168 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
169 | ||
26c9d55e | 170 | /* Shared between threads */ |
099e26bd | 171 | static int dispatch_thread_exit; |
fac6795d | 172 | |
54d01ffb DG |
173 | /* Global application Unix socket path */ |
174 | static char apps_unix_sock_path[PATH_MAX]; | |
175 | /* Global client Unix socket path */ | |
176 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
177 | /* global wait shm path for UST */ |
178 | static char wait_shm_path[PATH_MAX]; | |
44a5e5eb DG |
179 | /* Global health check unix path */ |
180 | static char health_unix_sock_path[PATH_MAX]; | |
fac6795d | 181 | |
1d4b027a | 182 | /* Sockets and FDs */ |
a4b35e07 MD |
183 | static int client_sock = -1; |
184 | static int apps_sock = -1; | |
2f77fc4b | 185 | int kernel_tracer_fd = -1; |
76d7553f | 186 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 187 | |
273ea72c DG |
188 | /* |
189 | * Quit pipe for all threads. This permits a single cancellation point | |
190 | * for all threads when receiving an event on the pipe. | |
191 | */ | |
76d7553f | 192 | static int thread_quit_pipe[2] = { -1, -1 }; |
4a15001e | 193 | static int ht_cleanup_quit_pipe[2] = { -1, -1 }; |
273ea72c | 194 | |
099e26bd DG |
195 | /* |
196 | * This pipe is used to inform the thread managing application communication | |
197 | * that a command is queued and ready to be processed. | |
198 | */ | |
76d7553f | 199 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 200 | |
d0b96690 DG |
201 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
202 | ||
1d4b027a | 203 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 204 | static pthread_t apps_thread; |
d0b96690 | 205 | static pthread_t apps_notify_thread; |
099e26bd | 206 | static pthread_t reg_apps_thread; |
1d4b027a | 207 | static pthread_t client_thread; |
7a485870 | 208 | static pthread_t kernel_thread; |
099e26bd | 209 | static pthread_t dispatch_thread; |
44a5e5eb | 210 | static pthread_t health_thread; |
0b2dc8df | 211 | static pthread_t ht_cleanup_thread; |
022d91ba | 212 | static pthread_t agent_reg_thread; |
ef367a93 | 213 | static pthread_t load_session_thread; |
5eb91c98 | 214 | |
099e26bd DG |
215 | /* |
216 | * UST registration command queue. This queue is tied with a futex and uses a N | |
217 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
218 | * | |
b22c5da8 DG |
219 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
220 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
221 | * the line new application socket and monitors it for any I/O error or clean | |
222 | * close that triggers an unregistration of the application. | |
099e26bd DG |
223 | */ |
224 | static struct ust_cmd_queue ust_cmd_queue; | |
225 | ||
b5541356 DG |
226 | /* |
227 | * Pointer initialized before thread creation. | |
228 | * | |
229 | * This points to the tracing session list containing the session count and a | |
230 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
231 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 232 | * |
d063d709 | 233 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 234 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
235 | */ |
236 | static struct ltt_session_list *session_list_ptr; | |
237 | ||
7753dea8 MD |
238 | int ust_consumerd64_fd = -1; |
239 | int ust_consumerd32_fd = -1; | |
240 | ||
fb6f1fa2 YB |
241 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
242 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
243 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
244 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
26296c48 JG |
245 | static int consumerd32_bin_override; |
246 | static int consumerd64_bin_override; | |
247 | static int consumerd32_libdir_override; | |
248 | static int consumerd64_libdir_override; | |
fb09408a | 249 | |
2f77fc4b DG |
250 | static const char *module_proc_lttng = "/proc/lttng"; |
251 | ||
5c827ce0 DG |
252 | /* |
253 | * Consumer daemon state which is changed when spawning it, killing it or in | |
254 | * case of a fatal error. | |
255 | */ | |
256 | enum consumerd_state { | |
257 | CONSUMER_STARTED = 1, | |
258 | CONSUMER_STOPPED = 2, | |
259 | CONSUMER_ERROR = 3, | |
260 | }; | |
261 | ||
262 | /* | |
263 | * This consumer daemon state is used to validate if a client command will be | |
264 | * able to reach the consumer. If not, the client is informed. For instance, | |
265 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
266 | * error to the client. | |
267 | * | |
268 | * The following example shows a possible race condition of this scheme: | |
269 | * | |
270 | * consumer thread error happens | |
271 | * client cmd arrives | |
272 | * client cmd checks state -> still OK | |
273 | * consumer thread exit, sets error | |
274 | * client cmd try to talk to consumer | |
275 | * ... | |
276 | * | |
277 | * However, since the consumer is a different daemon, we have no way of making | |
278 | * sure the command will reach it safely even with this state flag. This is why | |
279 | * we consider that up to the state validation during command processing, the | |
280 | * command is safe. After that, we can not guarantee the correctness of the | |
281 | * client request vis-a-vis the consumer. | |
282 | */ | |
283 | static enum consumerd_state ust_consumerd_state; | |
284 | static enum consumerd_state kernel_consumerd_state; | |
285 | ||
ae9e45b3 DG |
286 | /* |
287 | * Socket timeout for receiving and sending in seconds. | |
288 | */ | |
289 | static int app_socket_timeout; | |
290 | ||
12744796 DG |
291 | /* Set in main() with the current page size. */ |
292 | long page_size; | |
293 | ||
8782cc74 MD |
294 | /* Application health monitoring */ |
295 | struct health_app *health_sessiond; | |
296 | ||
022d91ba DG |
297 | /* Agent TCP port for registration. Used by the agent thread. */ |
298 | unsigned int agent_tcp_port = DEFAULT_AGENT_TCP_PORT; | |
4d076222 | 299 | |
f43f95a9 DG |
300 | /* Am I root or not. */ |
301 | int is_root; /* Set to 1 if the daemon is running as root */ | |
302 | ||
26296c48 JG |
303 | const char * const config_section_name = "sessiond"; |
304 | ||
ef367a93 JG |
305 | /* Load session thread information to operate. */ |
306 | struct load_session_thread_data *load_info; | |
307 | ||
7c1d2758 JG |
308 | /* Global hash tables */ |
309 | struct lttng_ht *agent_apps_ht_by_sock = NULL; | |
310 | ||
97bc1426 MD |
311 | /* |
312 | * Whether sessiond is ready for commands/health check requests. | |
313 | * NR_LTTNG_SESSIOND_READY must match the number of calls to | |
ef367a93 | 314 | * sessiond_notify_ready(). |
97bc1426 | 315 | */ |
ef367a93 | 316 | #define NR_LTTNG_SESSIOND_READY 3 |
97bc1426 MD |
317 | int lttng_sessiond_ready = NR_LTTNG_SESSIOND_READY; |
318 | ||
319 | /* Notify parents that we are ready for cmd and health check */ | |
ef367a93 JG |
320 | LTTNG_HIDDEN |
321 | void sessiond_notify_ready(void) | |
97bc1426 MD |
322 | { |
323 | if (uatomic_sub_return(<tng_sessiond_ready, 1) == 0) { | |
324 | /* | |
325 | * Notify parent pid that we are ready to accept command | |
326 | * for client side. This ppid is the one from the | |
327 | * external process that spawned us. | |
328 | */ | |
329 | if (opt_sig_parent) { | |
330 | kill(ppid, SIGUSR1); | |
331 | } | |
332 | ||
333 | /* | |
334 | * Notify the parent of the fork() process that we are | |
335 | * ready. | |
336 | */ | |
72dd7491 | 337 | if (opt_daemon || opt_background) { |
97bc1426 MD |
338 | kill(child_ppid, SIGUSR1); |
339 | } | |
340 | } | |
341 | } | |
342 | ||
fb09408a | 343 | static |
7753dea8 | 344 | void setup_consumerd_path(void) |
fb09408a | 345 | { |
fc7a59ce | 346 | const char *bin, *libdir; |
fb09408a | 347 | |
7753dea8 MD |
348 | /* |
349 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
350 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
351 | * has not been defined. | |
7753dea8 | 352 | */ |
ebaeda94 | 353 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
354 | if (!consumerd32_bin[0]) { |
355 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
356 | } |
357 | if (!consumerd32_libdir[0]) { | |
358 | consumerd32_libdir = INSTALL_LIB_PATH; | |
359 | } | |
360 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
361 | if (!consumerd64_bin[0]) { |
362 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 363 | } |
ebaeda94 MD |
364 | if (!consumerd64_libdir[0]) { |
365 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
366 | } |
367 | #else | |
368 | #error "Unknown bitness" | |
369 | #endif | |
370 | ||
fb09408a MD |
371 | /* |
372 | * runtime env. var. overrides the build default. | |
373 | */ | |
e8fa9fb0 | 374 | bin = lttng_secure_getenv("LTTNG_CONSUMERD32_BIN"); |
fc7a59ce AM |
375 | if (bin) { |
376 | consumerd32_bin = bin; | |
7753dea8 | 377 | } |
e8fa9fb0 | 378 | bin = lttng_secure_getenv("LTTNG_CONSUMERD64_BIN"); |
fc7a59ce AM |
379 | if (bin) { |
380 | consumerd64_bin = bin; | |
ebaeda94 | 381 | } |
e8fa9fb0 | 382 | libdir = lttng_secure_getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
383 | if (libdir) { |
384 | consumerd32_libdir = libdir; | |
385 | } | |
e8fa9fb0 | 386 | libdir = lttng_secure_getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
387 | if (libdir) { |
388 | consumerd64_libdir = libdir; | |
fb09408a MD |
389 | } |
390 | } | |
391 | ||
4a15001e MD |
392 | static |
393 | int __sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size, | |
394 | int *a_pipe) | |
5eb91c98 DG |
395 | { |
396 | int ret; | |
397 | ||
d0b96690 | 398 | assert(events); |
5eb91c98 DG |
399 | |
400 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
401 | if (ret < 0) { | |
402 | goto error; | |
403 | } | |
404 | ||
405 | /* Add quit pipe */ | |
4a15001e | 406 | ret = lttng_poll_add(events, a_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
407 | if (ret < 0) { |
408 | goto error; | |
409 | } | |
410 | ||
411 | return 0; | |
412 | ||
413 | error: | |
414 | return ret; | |
415 | } | |
416 | ||
4a15001e MD |
417 | /* |
418 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
419 | */ | |
420 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) | |
421 | { | |
422 | return __sessiond_set_thread_pollset(events, size, thread_quit_pipe); | |
423 | } | |
424 | ||
425 | /* | |
426 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
427 | */ | |
428 | int sessiond_set_ht_cleanup_thread_pollset(struct lttng_poll_event *events, | |
429 | size_t size) | |
430 | { | |
431 | return __sessiond_set_thread_pollset(events, size, | |
432 | ht_cleanup_quit_pipe); | |
433 | } | |
434 | ||
435 | static | |
436 | int __sessiond_check_thread_quit_pipe(int fd, uint32_t events, int a_pipe) | |
437 | { | |
438 | if (fd == a_pipe && (events & LPOLLIN)) { | |
439 | return 1; | |
440 | } | |
441 | return 0; | |
442 | } | |
443 | ||
5eb91c98 DG |
444 | /* |
445 | * Check if the thread quit pipe was triggered. | |
446 | * | |
447 | * Return 1 if it was triggered else 0; | |
448 | */ | |
d0b96690 | 449 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
5eb91c98 | 450 | { |
4a15001e MD |
451 | return __sessiond_check_thread_quit_pipe(fd, events, |
452 | thread_quit_pipe[0]); | |
453 | } | |
5eb91c98 | 454 | |
4a15001e MD |
455 | /* |
456 | * Check if the ht_cleanup thread quit pipe was triggered. | |
457 | * | |
458 | * Return 1 if it was triggered else 0; | |
459 | */ | |
460 | int sessiond_check_ht_cleanup_quit(int fd, uint32_t events) | |
461 | { | |
462 | return __sessiond_check_thread_quit_pipe(fd, events, | |
463 | ht_cleanup_quit_pipe[0]); | |
5eb91c98 DG |
464 | } |
465 | ||
273ea72c | 466 | /* |
5eb91c98 | 467 | * Init thread quit pipe. |
273ea72c DG |
468 | * |
469 | * Return -1 on error or 0 if all pipes are created. | |
470 | */ | |
4a15001e | 471 | static int __init_thread_quit_pipe(int *a_pipe) |
273ea72c | 472 | { |
730389d9 | 473 | int ret, i; |
273ea72c | 474 | |
4a15001e | 475 | ret = pipe(a_pipe); |
273ea72c | 476 | if (ret < 0) { |
730389d9 | 477 | PERROR("thread quit pipe"); |
273ea72c DG |
478 | goto error; |
479 | } | |
480 | ||
730389d9 | 481 | for (i = 0; i < 2; i++) { |
4a15001e | 482 | ret = fcntl(a_pipe[i], F_SETFD, FD_CLOEXEC); |
730389d9 DG |
483 | if (ret < 0) { |
484 | PERROR("fcntl"); | |
485 | goto error; | |
486 | } | |
487 | } | |
488 | ||
273ea72c DG |
489 | error: |
490 | return ret; | |
491 | } | |
492 | ||
4a15001e MD |
493 | static int init_thread_quit_pipe(void) |
494 | { | |
495 | return __init_thread_quit_pipe(thread_quit_pipe); | |
496 | } | |
497 | ||
498 | static int init_ht_cleanup_quit_pipe(void) | |
499 | { | |
500 | return __init_thread_quit_pipe(ht_cleanup_quit_pipe); | |
501 | } | |
502 | ||
099e26bd DG |
503 | /* |
504 | * Stop all threads by closing the thread quit pipe. | |
505 | */ | |
cf3af59e MD |
506 | static void stop_threads(void) |
507 | { | |
5eb91c98 DG |
508 | int ret; |
509 | ||
cf3af59e MD |
510 | /* Stopping all threads */ |
511 | DBG("Terminating all threads"); | |
54d01ffb | 512 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
513 | if (ret < 0) { |
514 | ERR("write error on thread quit pipe"); | |
515 | } | |
516 | ||
099e26bd | 517 | /* Dispatch thread */ |
26c9d55e | 518 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 519 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
520 | } |
521 | ||
e975f9f8 DG |
522 | /* |
523 | * Close every consumer sockets. | |
524 | */ | |
525 | static void close_consumer_sockets(void) | |
526 | { | |
527 | int ret; | |
528 | ||
529 | if (kconsumer_data.err_sock >= 0) { | |
530 | ret = close(kconsumer_data.err_sock); | |
531 | if (ret < 0) { | |
532 | PERROR("kernel consumer err_sock close"); | |
533 | } | |
534 | } | |
535 | if (ustconsumer32_data.err_sock >= 0) { | |
536 | ret = close(ustconsumer32_data.err_sock); | |
537 | if (ret < 0) { | |
a76cbd9f | 538 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
539 | } |
540 | } | |
541 | if (ustconsumer64_data.err_sock >= 0) { | |
542 | ret = close(ustconsumer64_data.err_sock); | |
543 | if (ret < 0) { | |
a76cbd9f | 544 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
545 | } |
546 | } | |
547 | if (kconsumer_data.cmd_sock >= 0) { | |
548 | ret = close(kconsumer_data.cmd_sock); | |
549 | if (ret < 0) { | |
550 | PERROR("kernel consumer cmd_sock close"); | |
551 | } | |
552 | } | |
553 | if (ustconsumer32_data.cmd_sock >= 0) { | |
554 | ret = close(ustconsumer32_data.cmd_sock); | |
555 | if (ret < 0) { | |
a76cbd9f | 556 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
557 | } |
558 | } | |
559 | if (ustconsumer64_data.cmd_sock >= 0) { | |
560 | ret = close(ustconsumer64_data.cmd_sock); | |
561 | if (ret < 0) { | |
a76cbd9f | 562 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
563 | } |
564 | } | |
565 | } | |
566 | ||
c9cb3e7d JG |
567 | /* |
568 | * Generate the full lock file path using the rundir. | |
569 | * | |
570 | * Return the snprintf() return value thus a negative value is an error. | |
571 | */ | |
572 | static int generate_lock_file_path(char *path, size_t len) | |
573 | { | |
574 | int ret; | |
575 | ||
576 | assert(path); | |
577 | assert(rundir); | |
578 | ||
579 | /* Build lockfile path from rundir. */ | |
580 | ret = snprintf(path, len, "%s/" DEFAULT_LTTNG_SESSIOND_LOCKFILE, rundir); | |
581 | if (ret < 0) { | |
582 | PERROR("snprintf lockfile path"); | |
583 | } | |
584 | ||
585 | return ret; | |
586 | } | |
587 | ||
4e4714cb JR |
588 | /* |
589 | * Wait on consumer process termination. | |
590 | * | |
591 | * Need to be called with the consumer data lock held or from a context | |
592 | * ensuring no concurrent access to data (e.g: cleanup). | |
593 | */ | |
594 | static void wait_consumer(struct consumer_data *consumer_data) | |
595 | { | |
596 | pid_t ret; | |
597 | int status; | |
598 | ||
599 | if (consumer_data->pid <= 0) { | |
600 | return; | |
601 | } | |
602 | ||
603 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
604 | consumer_data->pid); | |
605 | ret = waitpid(consumer_data->pid, &status, 0); | |
606 | if (ret == -1) { | |
607 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
4c8e2382 | 608 | } else if (!WIFEXITED(status)) { |
4e4714cb JR |
609 | ERR("consumerd termination with error: %d", |
610 | WEXITSTATUS(ret)); | |
611 | } | |
612 | consumer_data->pid = 0; | |
613 | } | |
614 | ||
fac6795d | 615 | /* |
4a15001e | 616 | * Cleanup the session daemon's data structures. |
fac6795d | 617 | */ |
4a15001e | 618 | static void sessiond_cleanup(void) |
fac6795d | 619 | { |
ef599319 | 620 | int ret; |
af9737e9 | 621 | struct ltt_session *sess, *stmp; |
8c6c56c2 | 622 | char path[PATH_MAX]; |
fac6795d | 623 | |
4a15001e | 624 | DBG("Cleanup sessiond"); |
e07ae692 | 625 | |
4e449f3f MD |
626 | /* |
627 | * Close the thread quit pipe. It has already done its job, | |
628 | * since we are now called. | |
629 | */ | |
2f77fc4b DG |
630 | utils_close_pipe(thread_quit_pipe); |
631 | ||
35f90c40 DG |
632 | /* |
633 | * If opt_pidfile is undefined, the default file will be wiped when | |
634 | * removing the rundir. | |
635 | */ | |
636 | if (opt_pidfile) { | |
637 | ret = remove(opt_pidfile); | |
638 | if (ret < 0) { | |
639 | PERROR("remove pidfile %s", opt_pidfile); | |
640 | } | |
641 | } | |
642 | ||
8c6c56c2 MD |
643 | DBG("Removing sessiond and consumerd content of directory %s", rundir); |
644 | ||
645 | /* sessiond */ | |
646 | snprintf(path, PATH_MAX, | |
647 | "%s/%s", | |
648 | rundir, DEFAULT_LTTNG_SESSIOND_PIDFILE); | |
649 | DBG("Removing %s", path); | |
650 | (void) unlink(path); | |
651 | ||
cd9290dd | 652 | snprintf(path, PATH_MAX, "%s/%s", rundir, |
022d91ba | 653 | DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE); |
cd9290dd DG |
654 | DBG("Removing %s", path); |
655 | (void) unlink(path); | |
656 | ||
8c6c56c2 MD |
657 | /* kconsumerd */ |
658 | snprintf(path, PATH_MAX, | |
659 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, | |
660 | rundir); | |
661 | DBG("Removing %s", path); | |
662 | (void) unlink(path); | |
663 | ||
664 | snprintf(path, PATH_MAX, | |
665 | DEFAULT_KCONSUMERD_PATH, | |
666 | rundir); | |
667 | DBG("Removing directory %s", path); | |
668 | (void) rmdir(path); | |
669 | ||
670 | /* ust consumerd 32 */ | |
671 | snprintf(path, PATH_MAX, | |
672 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, | |
673 | rundir); | |
674 | DBG("Removing %s", path); | |
675 | (void) unlink(path); | |
676 | ||
677 | snprintf(path, PATH_MAX, | |
678 | DEFAULT_USTCONSUMERD32_PATH, | |
679 | rundir); | |
680 | DBG("Removing directory %s", path); | |
681 | (void) rmdir(path); | |
682 | ||
683 | /* ust consumerd 64 */ | |
684 | snprintf(path, PATH_MAX, | |
685 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, | |
686 | rundir); | |
687 | DBG("Removing %s", path); | |
688 | (void) unlink(path); | |
689 | ||
690 | snprintf(path, PATH_MAX, | |
691 | DEFAULT_USTCONSUMERD64_PATH, | |
692 | rundir); | |
693 | DBG("Removing directory %s", path); | |
694 | (void) rmdir(path); | |
5461b305 | 695 | |
99bab54f | 696 | DBG("Cleaning up all sessions"); |
fac6795d | 697 | |
b5541356 | 698 | /* Destroy session list mutex */ |
273ea72c DG |
699 | if (session_list_ptr != NULL) { |
700 | pthread_mutex_destroy(&session_list_ptr->lock); | |
701 | ||
702 | /* Cleanup ALL session */ | |
54d01ffb DG |
703 | cds_list_for_each_entry_safe(sess, stmp, |
704 | &session_list_ptr->head, list) { | |
2f77fc4b | 705 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
706 | } |
707 | } | |
708 | ||
4e4714cb JR |
709 | wait_consumer(&kconsumer_data); |
710 | wait_consumer(&ustconsumer64_data); | |
711 | wait_consumer(&ustconsumer32_data); | |
712 | ||
6a4e4039 JG |
713 | DBG("Cleaning up all agent apps"); |
714 | agent_app_ht_clean(); | |
715 | ||
099e26bd | 716 | DBG("Closing all UST sockets"); |
56fff090 | 717 | ust_app_clean_list(); |
7972aab2 | 718 | buffer_reg_destroy_registries(); |
099e26bd | 719 | |
4fba7219 DG |
720 | if (is_root && !opt_no_kernel) { |
721 | DBG2("Closing kernel fd"); | |
a4b35e07 | 722 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
723 | ret = close(kernel_tracer_fd); |
724 | if (ret) { | |
725 | PERROR("close"); | |
726 | } | |
a4b35e07 | 727 | } |
2f50c8a3 | 728 | DBG("Unloading kernel modules"); |
096102bd | 729 | modprobe_remove_lttng_all(); |
834978fd | 730 | free(syscall_table); |
2f50c8a3 | 731 | } |
2f77fc4b | 732 | |
e975f9f8 DG |
733 | close_consumer_sockets(); |
734 | ||
ef367a93 JG |
735 | if (load_info) { |
736 | load_session_destroy_data(load_info); | |
737 | free(load_info); | |
738 | } | |
739 | ||
c9cb3e7d JG |
740 | /* |
741 | * Cleanup lock file by deleting it and finaly closing it which will | |
742 | * release the file system lock. | |
743 | */ | |
744 | if (lockfile_fd >= 0) { | |
745 | char lockfile_path[PATH_MAX]; | |
746 | ||
4a15001e MD |
747 | ret = generate_lock_file_path(lockfile_path, |
748 | sizeof(lockfile_path)); | |
c9cb3e7d JG |
749 | if (ret > 0) { |
750 | ret = remove(lockfile_path); | |
751 | if (ret < 0) { | |
752 | PERROR("remove lock file"); | |
753 | } | |
754 | ret = close(lockfile_fd); | |
755 | if (ret < 0) { | |
756 | PERROR("close lock file"); | |
757 | } | |
758 | } | |
759 | } | |
760 | ||
761 | /* | |
762 | * We do NOT rmdir rundir because there are other processes | |
763 | * using it, for instance lttng-relayd, which can start in | |
764 | * parallel with this teardown. | |
765 | */ | |
766 | ||
767 | free(rundir); | |
4a15001e MD |
768 | } |
769 | ||
770 | /* | |
771 | * Cleanup the daemon's option data structures. | |
772 | */ | |
773 | static void sessiond_cleanup_options(void) | |
774 | { | |
775 | DBG("Cleaning up options"); | |
776 | ||
777 | /* | |
778 | * If the override option is set, the pointer points to a *non* const | |
779 | * thus freeing it even though the variable type is set to const. | |
780 | */ | |
781 | if (tracing_group_name_override) { | |
782 | free((void *) tracing_group_name); | |
783 | } | |
784 | if (consumerd32_bin_override) { | |
785 | free((void *) consumerd32_bin); | |
786 | } | |
787 | if (consumerd64_bin_override) { | |
788 | free((void *) consumerd64_bin); | |
789 | } | |
790 | if (consumerd32_libdir_override) { | |
791 | free((void *) consumerd32_libdir); | |
792 | } | |
793 | if (consumerd64_libdir_override) { | |
794 | free((void *) consumerd64_libdir); | |
795 | } | |
796 | ||
797 | free(opt_pidfile); | |
798 | free(opt_load_session_path); | |
799 | free(kmod_probes_list); | |
800 | free(kmod_extra_probes_list); | |
c9cb3e7d | 801 | |
7567352f MD |
802 | run_as_destroy_worker(); |
803 | ||
421cb601 | 804 | /* <fun> */ |
f56a39af | 805 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
806 | "Matthew, BEET driven development works!%c[%dm", |
807 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
808 | /* </fun> */ | |
fac6795d DG |
809 | } |
810 | ||
e065084a | 811 | /* |
d063d709 | 812 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 813 | * |
d063d709 | 814 | * Return lttcomm error code. |
e065084a DG |
815 | */ |
816 | static int send_unix_sock(int sock, void *buf, size_t len) | |
817 | { | |
818 | /* Check valid length */ | |
c617c0c6 | 819 | if (len == 0) { |
e065084a DG |
820 | return -1; |
821 | } | |
822 | ||
823 | return lttcomm_send_unix_sock(sock, buf, len); | |
824 | } | |
825 | ||
5461b305 | 826 | /* |
d063d709 | 827 | * Free memory of a command context structure. |
5461b305 | 828 | */ |
a2fb29a5 | 829 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 830 | { |
a2fb29a5 DG |
831 | DBG("Clean command context structure"); |
832 | if (*cmd_ctx) { | |
833 | if ((*cmd_ctx)->llm) { | |
834 | free((*cmd_ctx)->llm); | |
5461b305 | 835 | } |
a2fb29a5 DG |
836 | if ((*cmd_ctx)->lsm) { |
837 | free((*cmd_ctx)->lsm); | |
5461b305 | 838 | } |
a2fb29a5 DG |
839 | free(*cmd_ctx); |
840 | *cmd_ctx = NULL; | |
5461b305 DG |
841 | } |
842 | } | |
843 | ||
fac6795d | 844 | /* |
0fdd1e2c | 845 | * Notify UST applications using the shm mmap futex. |
fac6795d | 846 | */ |
0fdd1e2c | 847 | static int notify_ust_apps(int active) |
fac6795d | 848 | { |
0fdd1e2c | 849 | char *wait_shm_mmap; |
fac6795d | 850 | |
0fdd1e2c | 851 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 852 | |
0fdd1e2c DG |
853 | /* See shm.c for this call implying mmap, shm and futex calls */ |
854 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
855 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
856 | goto error; |
857 | } | |
858 | ||
0fdd1e2c DG |
859 | /* Wake waiting process */ |
860 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
861 | ||
862 | /* Apps notified successfully */ | |
863 | return 0; | |
fac6795d DG |
864 | |
865 | error: | |
0fdd1e2c | 866 | return -1; |
fac6795d DG |
867 | } |
868 | ||
e065084a | 869 | /* |
d063d709 DG |
870 | * Setup the outgoing data buffer for the response (llm) by allocating the |
871 | * right amount of memory and copying the original information from the lsm | |
872 | * structure. | |
ca95a216 | 873 | * |
6e10c9b9 | 874 | * Return 0 on success, negative value on error. |
ca95a216 | 875 | */ |
6e10c9b9 PP |
876 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, |
877 | const void *payload_buf, size_t payload_len, | |
878 | const void *cmd_header_buf, size_t cmd_header_len) | |
ca95a216 | 879 | { |
6e10c9b9 PP |
880 | int ret = 0; |
881 | const size_t header_len = sizeof(struct lttcomm_lttng_msg); | |
882 | const size_t cmd_header_offset = header_len; | |
883 | const size_t payload_offset = cmd_header_offset + cmd_header_len; | |
884 | const size_t total_msg_size = header_len + cmd_header_len + payload_len; | |
ca95a216 | 885 | |
6e10c9b9 | 886 | cmd_ctx->llm = zmalloc(total_msg_size); |
5461b305 | 887 | |
5461b305 | 888 | if (cmd_ctx->llm == NULL) { |
76d7553f | 889 | PERROR("zmalloc"); |
5461b305 | 890 | ret = -ENOMEM; |
6e10c9b9 | 891 | goto end; |
ca95a216 DG |
892 | } |
893 | ||
5461b305 DG |
894 | /* Copy common data */ |
895 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 896 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
6e10c9b9 PP |
897 | cmd_ctx->llm->cmd_header_size = cmd_header_len; |
898 | cmd_ctx->llm->data_size = payload_len; | |
899 | cmd_ctx->lttng_msg_size = total_msg_size; | |
5461b305 | 900 | |
6e10c9b9 | 901 | /* Copy command header */ |
b4e3ceb9 PP |
902 | if (cmd_header_len) { |
903 | memcpy(((uint8_t *) cmd_ctx->llm) + cmd_header_offset, cmd_header_buf, | |
904 | cmd_header_len); | |
905 | } | |
5461b305 | 906 | |
6e10c9b9 | 907 | /* Copy payload */ |
b4e3ceb9 PP |
908 | if (payload_len) { |
909 | memcpy(((uint8_t *) cmd_ctx->llm) + payload_offset, payload_buf, | |
910 | payload_len); | |
911 | } | |
ca95a216 | 912 | |
6e10c9b9 | 913 | end: |
ca95a216 DG |
914 | return ret; |
915 | } | |
916 | ||
6e10c9b9 PP |
917 | /* |
918 | * Version of setup_lttng_msg() without command header. | |
919 | */ | |
920 | static int setup_lttng_msg_no_cmd_header(struct command_ctx *cmd_ctx, | |
921 | void *payload_buf, size_t payload_len) | |
922 | { | |
923 | return setup_lttng_msg(cmd_ctx, payload_buf, payload_len, NULL, 0); | |
924 | } | |
7a485870 | 925 | /* |
5eb91c98 | 926 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 927 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 928 | */ |
5eb91c98 | 929 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 930 | { |
5eb91c98 | 931 | int ret; |
7a485870 DG |
932 | struct ltt_session *session; |
933 | struct ltt_kernel_channel *channel; | |
934 | ||
5eb91c98 | 935 | DBG("Updating kernel poll set"); |
7a485870 | 936 | |
54d01ffb | 937 | session_lock_list(); |
b5541356 | 938 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 939 | session_lock(session); |
7a485870 | 940 | if (session->kernel_session == NULL) { |
54d01ffb | 941 | session_unlock(session); |
7a485870 DG |
942 | continue; |
943 | } | |
7a485870 | 944 | |
54d01ffb DG |
945 | cds_list_for_each_entry(channel, |
946 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
947 | /* Add channel fd to the kernel poll set */ |
948 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
949 | if (ret < 0) { | |
54d01ffb | 950 | session_unlock(session); |
5eb91c98 DG |
951 | goto error; |
952 | } | |
953 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 954 | } |
54d01ffb | 955 | session_unlock(session); |
7a485870 | 956 | } |
54d01ffb | 957 | session_unlock_list(); |
7a485870 | 958 | |
5eb91c98 | 959 | return 0; |
7a485870 DG |
960 | |
961 | error: | |
54d01ffb | 962 | session_unlock_list(); |
7a485870 DG |
963 | return -1; |
964 | } | |
965 | ||
966 | /* | |
54d01ffb | 967 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 968 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 969 | * |
d063d709 | 970 | * Useful for CPU hotplug feature. |
7a485870 | 971 | */ |
2bdd86d4 | 972 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
973 | { |
974 | int ret = 0; | |
975 | struct ltt_session *session; | |
173af62f | 976 | struct ltt_kernel_session *ksess; |
7a485870 DG |
977 | struct ltt_kernel_channel *channel; |
978 | ||
979 | DBG("Updating kernel streams for channel fd %d", fd); | |
980 | ||
54d01ffb | 981 | session_lock_list(); |
b5541356 | 982 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 983 | session_lock(session); |
7a485870 | 984 | if (session->kernel_session == NULL) { |
54d01ffb | 985 | session_unlock(session); |
7a485870 DG |
986 | continue; |
987 | } | |
173af62f | 988 | ksess = session->kernel_session; |
d9800920 | 989 | |
4a15001e MD |
990 | cds_list_for_each_entry(channel, |
991 | &ksess->channel_list.head, list) { | |
992 | struct lttng_ht_iter iter; | |
993 | struct consumer_socket *socket; | |
d9800920 | 994 | |
4a15001e MD |
995 | if (channel->fd != fd) { |
996 | continue; | |
997 | } | |
998 | DBG("Channel found, updating kernel streams"); | |
999 | ret = kernel_open_channel_stream(channel); | |
1000 | if (ret < 0) { | |
1001 | goto error; | |
1002 | } | |
1003 | /* Update the stream global counter */ | |
1004 | ksess->stream_count_global += ret; | |
1005 | ||
1006 | /* | |
1007 | * Have we already sent fds to the consumer? If yes, it | |
1008 | * means that tracing is started so it is safe to send | |
1009 | * our updated stream fds. | |
1010 | */ | |
1011 | if (ksess->consumer_fds_sent != 1 | |
1012 | || ksess->consumer == NULL) { | |
1013 | ret = -1; | |
1014 | goto error; | |
1015 | } | |
1016 | ||
1017 | rcu_read_lock(); | |
1018 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
1019 | &iter.iter, socket, node.node) { | |
1020 | pthread_mutex_lock(socket->lock); | |
1021 | ret = kernel_consumer_send_channel_stream(socket, | |
1022 | channel, ksess, | |
1023 | session->output_traces ? 1 : 0); | |
1024 | pthread_mutex_unlock(socket->lock); | |
1025 | if (ret < 0) { | |
e7fe706f | 1026 | rcu_read_unlock(); |
4a15001e | 1027 | goto error; |
7a485870 | 1028 | } |
7a485870 | 1029 | } |
4a15001e | 1030 | rcu_read_unlock(); |
7a485870 | 1031 | } |
54d01ffb | 1032 | session_unlock(session); |
7a485870 | 1033 | } |
54d01ffb | 1034 | session_unlock_list(); |
b3c750d2 | 1035 | return ret; |
7a485870 | 1036 | |
b3c750d2 | 1037 | error: |
54d01ffb DG |
1038 | session_unlock(session); |
1039 | session_unlock_list(); | |
7a485870 DG |
1040 | return ret; |
1041 | } | |
1042 | ||
487cf67c | 1043 | /* |
ffe60014 DG |
1044 | * For each tracing session, update newly registered apps. The session list |
1045 | * lock MUST be acquired before calling this. | |
487cf67c DG |
1046 | */ |
1047 | static void update_ust_app(int app_sock) | |
1048 | { | |
1049 | struct ltt_session *sess, *stmp; | |
1050 | ||
fdadac08 DG |
1051 | /* Consumer is in an ERROR state. Stop any application update. */ |
1052 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
1053 | /* Stop the update process since the consumer is dead. */ | |
1054 | return; | |
1055 | } | |
1056 | ||
487cf67c DG |
1057 | /* For all tracing session(s) */ |
1058 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
a9ad0c8f MD |
1059 | struct ust_app *app; |
1060 | ||
4ee14516 | 1061 | session_lock(sess); |
a9ad0c8f MD |
1062 | if (!sess->ust_session) { |
1063 | goto unlock_session; | |
1064 | } | |
1065 | ||
1066 | rcu_read_lock(); | |
1067 | assert(app_sock >= 0); | |
1068 | app = ust_app_find_by_sock(app_sock); | |
1069 | if (app == NULL) { | |
1070 | /* | |
1071 | * Application can be unregistered before so | |
1072 | * this is possible hence simply stopping the | |
1073 | * update. | |
1074 | */ | |
1075 | DBG3("UST app update failed to find app sock %d", | |
1076 | app_sock); | |
1077 | goto unlock_rcu; | |
421cb601 | 1078 | } |
a9ad0c8f MD |
1079 | ust_app_global_update(sess->ust_session, app); |
1080 | unlock_rcu: | |
1081 | rcu_read_unlock(); | |
1082 | unlock_session: | |
4ee14516 | 1083 | session_unlock(sess); |
487cf67c DG |
1084 | } |
1085 | } | |
1086 | ||
7a485870 | 1087 | /* |
d063d709 | 1088 | * This thread manage event coming from the kernel. |
7a485870 | 1089 | * |
d063d709 DG |
1090 | * Features supported in this thread: |
1091 | * -) CPU Hotplug | |
7a485870 DG |
1092 | */ |
1093 | static void *thread_manage_kernel(void *data) | |
1094 | { | |
139ac872 | 1095 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 1096 | uint32_t revents, nb_fd; |
7a485870 | 1097 | char tmp; |
5eb91c98 | 1098 | struct lttng_poll_event events; |
7a485870 | 1099 | |
6993eeb3 | 1100 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 1101 | |
6c71277b | 1102 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 1103 | |
d5d63bf1 DG |
1104 | /* |
1105 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 1106 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 1107 | */ |
6d737ce4 | 1108 | lttng_poll_init(&events); |
d5d63bf1 | 1109 | |
e547b070 | 1110 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
1111 | goto error_testpoint; |
1112 | } | |
8ac94142 | 1113 | |
840cb59c | 1114 | health_code_update(); |
44a5e5eb | 1115 | |
e547b070 | 1116 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 1117 | goto error_testpoint; |
6993eeb3 CB |
1118 | } |
1119 | ||
7a485870 | 1120 | while (1) { |
840cb59c | 1121 | health_code_update(); |
44a5e5eb | 1122 | |
7a485870 | 1123 | if (update_poll_flag == 1) { |
d21b0d71 DG |
1124 | /* Clean events object. We are about to populate it again. */ |
1125 | lttng_poll_clean(&events); | |
1126 | ||
d0b96690 | 1127 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
1128 | if (ret < 0) { |
1129 | goto error_poll_create; | |
1130 | } | |
1131 | ||
1132 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
1133 | if (ret < 0) { | |
1134 | goto error; | |
1135 | } | |
5f822d0a | 1136 | |
d21b0d71 | 1137 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
1138 | ret = update_kernel_poll(&events); |
1139 | if (ret < 0) { | |
7a485870 DG |
1140 | goto error; |
1141 | } | |
1142 | update_poll_flag = 0; | |
1143 | } | |
1144 | ||
7fa2082e | 1145 | DBG("Thread kernel polling"); |
7a485870 DG |
1146 | |
1147 | /* Poll infinite value of time */ | |
88f2b785 | 1148 | restart: |
a78af745 | 1149 | health_poll_entry(); |
5eb91c98 | 1150 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1151 | DBG("Thread kernel return from poll on %d fds", |
1152 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1153 | health_poll_exit(); |
7a485870 | 1154 | if (ret < 0) { |
88f2b785 MD |
1155 | /* |
1156 | * Restart interrupted system call. | |
1157 | */ | |
1158 | if (errno == EINTR) { | |
1159 | goto restart; | |
1160 | } | |
7a485870 DG |
1161 | goto error; |
1162 | } else if (ret == 0) { | |
1163 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
1164 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
1165 | "This should not have happened! Continuing..."); | |
7a485870 DG |
1166 | continue; |
1167 | } | |
1168 | ||
0d9c5d77 DG |
1169 | nb_fd = ret; |
1170 | ||
5eb91c98 DG |
1171 | for (i = 0; i < nb_fd; i++) { |
1172 | /* Fetch once the poll data */ | |
1173 | revents = LTTNG_POLL_GETEV(&events, i); | |
1174 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 1175 | |
840cb59c | 1176 | health_code_update(); |
44a5e5eb | 1177 | |
fd20dac9 MD |
1178 | if (!revents) { |
1179 | /* No activity for this FD (poll implementation). */ | |
1180 | continue; | |
1181 | } | |
1182 | ||
5eb91c98 | 1183 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1184 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1185 | if (ret) { |
139ac872 MD |
1186 | err = 0; |
1187 | goto exit; | |
5eb91c98 | 1188 | } |
7a485870 | 1189 | |
5eb91c98 | 1190 | /* Check for data on kernel pipe */ |
03e43155 MD |
1191 | if (revents & LPOLLIN) { |
1192 | if (pollfd == kernel_poll_pipe[0]) { | |
1193 | (void) lttng_read(kernel_poll_pipe[0], | |
1194 | &tmp, 1); | |
1195 | /* | |
1196 | * Ret value is useless here, if this pipe gets any actions an | |
1197 | * update is required anyway. | |
1198 | */ | |
1199 | update_poll_flag = 1; | |
1200 | continue; | |
1201 | } else { | |
1202 | /* | |
1203 | * New CPU detected by the kernel. Adding kernel stream to | |
1204 | * kernel session and updating the kernel consumer | |
1205 | */ | |
2bdd86d4 | 1206 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
1207 | if (ret < 0) { |
1208 | continue; | |
1209 | } | |
1210 | break; | |
7a485870 | 1211 | } |
03e43155 MD |
1212 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1213 | update_poll_flag = 1; | |
1214 | continue; | |
1215 | } else { | |
1216 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1217 | goto error; | |
7a485870 DG |
1218 | } |
1219 | } | |
1220 | } | |
1221 | ||
139ac872 | 1222 | exit: |
7a485870 | 1223 | error: |
5eb91c98 | 1224 | lttng_poll_clean(&events); |
76d7553f | 1225 | error_poll_create: |
6993eeb3 | 1226 | error_testpoint: |
6620da75 DG |
1227 | utils_close_pipe(kernel_poll_pipe); |
1228 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 1229 | if (err) { |
840cb59c | 1230 | health_error(); |
139ac872 | 1231 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
1232 | WARN("Kernel thread died unexpectedly. " |
1233 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 1234 | } |
8782cc74 | 1235 | health_unregister(health_sessiond); |
76d7553f | 1236 | DBG("Kernel thread dying"); |
7a485870 DG |
1237 | return NULL; |
1238 | } | |
1239 | ||
a23ec3a7 DG |
1240 | /* |
1241 | * Signal pthread condition of the consumer data that the thread. | |
1242 | */ | |
1243 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
1244 | { | |
1245 | pthread_mutex_lock(&data->cond_mutex); | |
1246 | ||
1247 | /* | |
1248 | * The state is set before signaling. It can be any value, it's the waiter | |
1249 | * job to correctly interpret this condition variable associated to the | |
1250 | * consumer pthread_cond. | |
1251 | * | |
1252 | * A value of 0 means that the corresponding thread of the consumer data | |
1253 | * was not started. 1 indicates that the thread has started and is ready | |
1254 | * for action. A negative value means that there was an error during the | |
1255 | * thread bootstrap. | |
1256 | */ | |
1257 | data->consumer_thread_is_ready = state; | |
1258 | (void) pthread_cond_signal(&data->cond); | |
1259 | ||
1260 | pthread_mutex_unlock(&data->cond_mutex); | |
1261 | } | |
1262 | ||
1d4b027a | 1263 | /* |
3bd1e081 | 1264 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1265 | */ |
3bd1e081 | 1266 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1267 | { |
42fc1d0b | 1268 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 1269 | uint32_t revents, nb_fd; |
1d4b027a | 1270 | enum lttcomm_return_code code; |
5eb91c98 | 1271 | struct lttng_poll_event events; |
3bd1e081 | 1272 | struct consumer_data *consumer_data = data; |
1d4b027a | 1273 | |
3bd1e081 | 1274 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1275 | |
34c1e15a MD |
1276 | rcu_register_thread(); |
1277 | rcu_thread_online(); | |
1278 | ||
6c71277b | 1279 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1280 | |
855060f8 | 1281 | health_code_update(); |
9449cc75 | 1282 | |
5eb91c98 | 1283 | /* |
331744e3 JD |
1284 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1285 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1286 | */ |
331744e3 | 1287 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1288 | if (ret < 0) { |
76d7553f | 1289 | goto error_poll; |
5eb91c98 | 1290 | } |
273ea72c | 1291 | |
edb8b045 DG |
1292 | /* |
1293 | * The error socket here is already in a listening state which was done | |
1294 | * just before spawning this thread to avoid a race between the consumer | |
1295 | * daemon exec trying to connect and the listen() call. | |
1296 | */ | |
3bd1e081 | 1297 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1298 | if (ret < 0) { |
1299 | goto error; | |
1300 | } | |
1301 | ||
840cb59c | 1302 | health_code_update(); |
44a5e5eb | 1303 | |
331744e3 | 1304 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1305 | restart: |
a78af745 | 1306 | health_poll_entry(); |
8ac94142 | 1307 | |
e547b070 | 1308 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
1309 | goto error; |
1310 | } | |
8ac94142 | 1311 | |
5eb91c98 | 1312 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1313 | health_poll_exit(); |
273ea72c | 1314 | if (ret < 0) { |
88f2b785 MD |
1315 | /* |
1316 | * Restart interrupted system call. | |
1317 | */ | |
1318 | if (errno == EINTR) { | |
1319 | goto restart; | |
1320 | } | |
273ea72c DG |
1321 | goto error; |
1322 | } | |
1323 | ||
0d9c5d77 DG |
1324 | nb_fd = ret; |
1325 | ||
5eb91c98 DG |
1326 | for (i = 0; i < nb_fd; i++) { |
1327 | /* Fetch once the poll data */ | |
1328 | revents = LTTNG_POLL_GETEV(&events, i); | |
1329 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1330 | ||
840cb59c | 1331 | health_code_update(); |
44a5e5eb | 1332 | |
fd20dac9 MD |
1333 | if (!revents) { |
1334 | /* No activity for this FD (poll implementation). */ | |
1335 | continue; | |
1336 | } | |
1337 | ||
5eb91c98 | 1338 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1339 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1340 | if (ret) { |
139ac872 MD |
1341 | err = 0; |
1342 | goto exit; | |
5eb91c98 DG |
1343 | } |
1344 | ||
1345 | /* Event on the registration socket */ | |
3bd1e081 | 1346 | if (pollfd == consumer_data->err_sock) { |
03e43155 MD |
1347 | if (revents & LPOLLIN) { |
1348 | continue; | |
1349 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1350 | ERR("consumer err socket poll error"); |
5eb91c98 | 1351 | goto error; |
03e43155 MD |
1352 | } else { |
1353 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1354 | goto error; | |
5eb91c98 DG |
1355 | } |
1356 | } | |
273ea72c DG |
1357 | } |
1358 | ||
3bd1e081 | 1359 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1360 | if (sock < 0) { |
1361 | goto error; | |
1362 | } | |
1363 | ||
b662582b DG |
1364 | /* |
1365 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1366 | * show must go on. | |
1367 | */ | |
1368 | (void) utils_set_fd_cloexec(sock); | |
1369 | ||
840cb59c | 1370 | health_code_update(); |
44a5e5eb | 1371 | |
3bd1e081 | 1372 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1373 | |
712ea556 | 1374 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1375 | ret = lttcomm_recv_unix_sock(sock, &code, |
1376 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1377 | if (ret <= 0) { |
1378 | goto error; | |
1379 | } | |
1380 | ||
840cb59c | 1381 | health_code_update(); |
f73fabfd | 1382 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
331744e3 | 1383 | /* Connect both socket, command and metadata. */ |
3bd1e081 MD |
1384 | consumer_data->cmd_sock = |
1385 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
4ce514c4 | 1386 | consumer_data->metadata_fd = |
331744e3 | 1387 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); |
92db7cdc DG |
1388 | if (consumer_data->cmd_sock < 0 |
1389 | || consumer_data->metadata_fd < 0) { | |
331744e3 | 1390 | PERROR("consumer connect cmd socket"); |
a23ec3a7 DG |
1391 | /* On error, signal condition and quit. */ |
1392 | signal_consumer_condition(consumer_data, -1); | |
1d4b027a DG |
1393 | goto error; |
1394 | } | |
9363801e | 1395 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; |
331744e3 JD |
1396 | /* Create metadata socket lock. */ |
1397 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1398 | if (consumer_data->metadata_sock.lock == NULL) { | |
1399 | PERROR("zmalloc pthread mutex"); | |
1400 | ret = -1; | |
1401 | goto error; | |
1402 | } | |
1403 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1404 | ||
a23ec3a7 | 1405 | signal_consumer_condition(consumer_data, 1); |
331744e3 JD |
1406 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); |
1407 | DBG("Consumer metadata socket ready (fd: %d)", | |
4ce514c4 | 1408 | consumer_data->metadata_fd); |
1d4b027a | 1409 | } else { |
3bd1e081 | 1410 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1411 | lttcomm_get_readable_code(-code)); |
1412 | goto error; | |
1413 | } | |
1414 | ||
331744e3 | 1415 | /* Remove the consumerd error sock since we've established a connexion */ |
3bd1e081 | 1416 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1417 | if (ret < 0) { |
72079cae DG |
1418 | goto error; |
1419 | } | |
1420 | ||
331744e3 | 1421 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1422 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1423 | if (ret < 0) { | |
72079cae | 1424 | goto error; |
5eb91c98 DG |
1425 | } |
1426 | ||
331744e3 | 1427 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1428 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1429 | LPOLLIN | LPOLLRDHUP); |
1430 | if (ret < 0) { | |
1431 | goto error; | |
1432 | } | |
1433 | ||
840cb59c | 1434 | health_code_update(); |
44a5e5eb | 1435 | |
331744e3 | 1436 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1437 | restart_poll: |
331744e3 | 1438 | while (1) { |
42fc1d0b DG |
1439 | health_code_update(); |
1440 | ||
1441 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
1442 | if (should_quit) { | |
1443 | /* Not a health error. */ | |
1444 | err = 0; | |
1445 | goto exit; | |
1446 | } | |
1447 | ||
331744e3 JD |
1448 | health_poll_entry(); |
1449 | ret = lttng_poll_wait(&events, -1); | |
1450 | health_poll_exit(); | |
1451 | if (ret < 0) { | |
1452 | /* | |
1453 | * Restart interrupted system call. | |
1454 | */ | |
1455 | if (errno == EINTR) { | |
1456 | goto restart_poll; | |
1457 | } | |
1458 | goto error; | |
88f2b785 | 1459 | } |
72079cae | 1460 | |
331744e3 | 1461 | nb_fd = ret; |
0d9c5d77 | 1462 | |
331744e3 JD |
1463 | for (i = 0; i < nb_fd; i++) { |
1464 | /* Fetch once the poll data */ | |
1465 | revents = LTTNG_POLL_GETEV(&events, i); | |
1466 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1467 | |
331744e3 | 1468 | health_code_update(); |
44a5e5eb | 1469 | |
fd20dac9 MD |
1470 | if (!revents) { |
1471 | /* No activity for this FD (poll implementation). */ | |
1472 | continue; | |
1473 | } | |
1474 | ||
42fc1d0b DG |
1475 | /* |
1476 | * Thread quit pipe has been triggered, flag that we should stop | |
1477 | * but continue the current loop to handle potential data from | |
1478 | * consumer. | |
1479 | */ | |
1480 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 1481 | |
331744e3 JD |
1482 | if (pollfd == sock) { |
1483 | /* Event on the consumerd socket */ | |
03e43155 MD |
1484 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1485 | && !(revents & LPOLLIN)) { | |
331744e3 JD |
1486 | ERR("consumer err socket second poll error"); |
1487 | goto error; | |
1488 | } | |
1489 | health_code_update(); | |
1490 | /* Wait for any kconsumerd error */ | |
1491 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1492 | sizeof(enum lttcomm_return_code)); | |
1493 | if (ret <= 0) { | |
1494 | ERR("consumer closed the command socket"); | |
1495 | goto error; | |
1496 | } | |
1497 | ||
1498 | ERR("consumer return code : %s", | |
1499 | lttcomm_get_readable_code(-code)); | |
1500 | ||
1501 | goto exit; | |
4ce514c4 | 1502 | } else if (pollfd == consumer_data->metadata_fd) { |
03e43155 MD |
1503 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1504 | && !(revents & LPOLLIN)) { | |
1505 | ERR("consumer err metadata socket second poll error"); | |
1506 | goto error; | |
1507 | } | |
331744e3 JD |
1508 | /* UST metadata requests */ |
1509 | ret = ust_consumer_metadata_request( | |
1510 | &consumer_data->metadata_sock); | |
1511 | if (ret < 0) { | |
1512 | ERR("Handling metadata request"); | |
1513 | goto error; | |
1514 | } | |
5eb91c98 | 1515 | } |
42fc1d0b | 1516 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 1517 | } |
331744e3 | 1518 | health_code_update(); |
5eb91c98 DG |
1519 | } |
1520 | ||
139ac872 | 1521 | exit: |
1d4b027a | 1522 | error: |
fdadac08 DG |
1523 | /* |
1524 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1525 | * thread might be using them so get exclusive access which will abort all |
1526 | * other consumer command by other threads. | |
fdadac08 DG |
1527 | */ |
1528 | pthread_mutex_lock(&consumer_data->lock); | |
1529 | ||
5c827ce0 DG |
1530 | /* Immediately set the consumerd state to stopped */ |
1531 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1532 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1533 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1534 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1535 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1536 | } else { | |
1537 | /* Code flow error... */ | |
1538 | assert(0); | |
1539 | } | |
1540 | ||
76d7553f MD |
1541 | if (consumer_data->err_sock >= 0) { |
1542 | ret = close(consumer_data->err_sock); | |
1543 | if (ret) { | |
1544 | PERROR("close"); | |
1545 | } | |
a76cbd9f | 1546 | consumer_data->err_sock = -1; |
76d7553f MD |
1547 | } |
1548 | if (consumer_data->cmd_sock >= 0) { | |
1549 | ret = close(consumer_data->cmd_sock); | |
1550 | if (ret) { | |
1551 | PERROR("close"); | |
1552 | } | |
a76cbd9f | 1553 | consumer_data->cmd_sock = -1; |
76d7553f | 1554 | } |
96544455 SS |
1555 | if (consumer_data->metadata_sock.fd_ptr && |
1556 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1557 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1558 | if (ret) { |
1559 | PERROR("close"); | |
1560 | } | |
1561 | } | |
76d7553f MD |
1562 | if (sock >= 0) { |
1563 | ret = close(sock); | |
1564 | if (ret) { | |
1565 | PERROR("close"); | |
1566 | } | |
1567 | } | |
273ea72c | 1568 | |
3bd1e081 MD |
1569 | unlink(consumer_data->err_unix_sock_path); |
1570 | unlink(consumer_data->cmd_unix_sock_path); | |
fdadac08 | 1571 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1572 | |
fdadac08 | 1573 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1574 | if (consumer_data->metadata_sock.lock) { |
1575 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1576 | free(consumer_data->metadata_sock.lock); | |
1577 | } | |
5eb91c98 | 1578 | lttng_poll_clean(&events); |
76d7553f | 1579 | error_poll: |
139ac872 | 1580 | if (err) { |
840cb59c | 1581 | health_error(); |
139ac872 MD |
1582 | ERR("Health error occurred in %s", __func__); |
1583 | } | |
8782cc74 | 1584 | health_unregister(health_sessiond); |
76d7553f | 1585 | DBG("consumer thread cleanup completed"); |
0177d773 | 1586 | |
34c1e15a MD |
1587 | rcu_thread_offline(); |
1588 | rcu_unregister_thread(); | |
1589 | ||
5eb91c98 | 1590 | return NULL; |
099e26bd DG |
1591 | } |
1592 | ||
099e26bd DG |
1593 | /* |
1594 | * This thread manage application communication. | |
1d4b027a DG |
1595 | */ |
1596 | static void *thread_manage_apps(void *data) | |
099e26bd | 1597 | { |
139ac872 | 1598 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1599 | ssize_t size_ret; |
5eb91c98 | 1600 | uint32_t revents, nb_fd; |
5eb91c98 | 1601 | struct lttng_poll_event events; |
099e26bd DG |
1602 | |
1603 | DBG("[thread] Manage application started"); | |
1604 | ||
f6a9efaa DG |
1605 | rcu_register_thread(); |
1606 | rcu_thread_online(); | |
1607 | ||
6c71277b | 1608 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1609 | |
e547b070 | 1610 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1611 | goto error_testpoint; |
1612 | } | |
1613 | ||
840cb59c | 1614 | health_code_update(); |
44a5e5eb | 1615 | |
d0b96690 | 1616 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1617 | if (ret < 0) { |
76d7553f | 1618 | goto error_poll_create; |
5eb91c98 | 1619 | } |
099e26bd | 1620 | |
5eb91c98 DG |
1621 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1622 | if (ret < 0) { | |
1623 | goto error; | |
1624 | } | |
099e26bd | 1625 | |
e547b070 | 1626 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1627 | goto error; |
1628 | } | |
8ac94142 | 1629 | |
840cb59c | 1630 | health_code_update(); |
44a5e5eb | 1631 | |
5eb91c98 | 1632 | while (1) { |
7fa2082e | 1633 | DBG("Apps thread polling"); |
099e26bd DG |
1634 | |
1635 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1636 | restart: |
a78af745 | 1637 | health_poll_entry(); |
5eb91c98 | 1638 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1639 | DBG("Apps thread return from poll on %d fds", |
1640 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1641 | health_poll_exit(); |
099e26bd | 1642 | if (ret < 0) { |
88f2b785 MD |
1643 | /* |
1644 | * Restart interrupted system call. | |
1645 | */ | |
1646 | if (errno == EINTR) { | |
1647 | goto restart; | |
1648 | } | |
099e26bd DG |
1649 | goto error; |
1650 | } | |
1651 | ||
0d9c5d77 DG |
1652 | nb_fd = ret; |
1653 | ||
5eb91c98 DG |
1654 | for (i = 0; i < nb_fd; i++) { |
1655 | /* Fetch once the poll data */ | |
1656 | revents = LTTNG_POLL_GETEV(&events, i); | |
1657 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1658 | ||
840cb59c | 1659 | health_code_update(); |
44a5e5eb | 1660 | |
fd20dac9 MD |
1661 | if (!revents) { |
1662 | /* No activity for this FD (poll implementation). */ | |
1663 | continue; | |
1664 | } | |
1665 | ||
5eb91c98 | 1666 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1667 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1668 | if (ret) { |
139ac872 MD |
1669 | err = 0; |
1670 | goto exit; | |
5eb91c98 | 1671 | } |
099e26bd | 1672 | |
5eb91c98 DG |
1673 | /* Inspect the apps cmd pipe */ |
1674 | if (pollfd == apps_cmd_pipe[0]) { | |
03e43155 | 1675 | if (revents & LPOLLIN) { |
d0b96690 DG |
1676 | int sock; |
1677 | ||
5eb91c98 | 1678 | /* Empty pipe */ |
6cd525e8 MD |
1679 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1680 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1681 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1682 | goto error; |
1683 | } | |
099e26bd | 1684 | |
840cb59c | 1685 | health_code_update(); |
44a5e5eb | 1686 | |
ffe60014 | 1687 | /* |
03e43155 MD |
1688 | * Since this is a command socket (write then read), |
1689 | * we only monitor the error events of the socket. | |
ffe60014 | 1690 | */ |
d0b96690 DG |
1691 | ret = lttng_poll_add(&events, sock, |
1692 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1693 | if (ret < 0) { | |
5eb91c98 | 1694 | goto error; |
e0c7ec2b | 1695 | } |
acc7b41b | 1696 | |
d0b96690 | 1697 | DBG("Apps with sock %d added to poll set", sock); |
03e43155 MD |
1698 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1699 | ERR("Apps command pipe error"); | |
1700 | goto error; | |
1701 | } else { | |
1702 | ERR("Unknown poll events %u for sock %d", revents, pollfd); | |
1703 | goto error; | |
0177d773 | 1704 | } |
5eb91c98 DG |
1705 | } else { |
1706 | /* | |
54d01ffb DG |
1707 | * At this point, we know that a registered application made |
1708 | * the event at poll_wait. | |
5eb91c98 DG |
1709 | */ |
1710 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1711 | /* Removing from the poll set */ | |
1712 | ret = lttng_poll_del(&events, pollfd); | |
1713 | if (ret < 0) { | |
1714 | goto error; | |
1715 | } | |
099e26bd | 1716 | |
b9d9b220 | 1717 | /* Socket closed on remote end. */ |
56fff090 | 1718 | ust_app_unregister(pollfd); |
03e43155 MD |
1719 | } else { |
1720 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1721 | goto error; | |
5eb91c98 | 1722 | } |
099e26bd | 1723 | } |
44a5e5eb | 1724 | |
840cb59c | 1725 | health_code_update(); |
099e26bd | 1726 | } |
099e26bd DG |
1727 | } |
1728 | ||
139ac872 | 1729 | exit: |
099e26bd | 1730 | error: |
5eb91c98 | 1731 | lttng_poll_clean(&events); |
76d7553f | 1732 | error_poll_create: |
6993eeb3 | 1733 | error_testpoint: |
6620da75 DG |
1734 | utils_close_pipe(apps_cmd_pipe); |
1735 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1736 | ||
1737 | /* | |
1738 | * We don't clean the UST app hash table here since already registered | |
1739 | * applications can still be controlled so let them be until the session | |
1740 | * daemon dies or the applications stop. | |
1741 | */ | |
1742 | ||
139ac872 | 1743 | if (err) { |
840cb59c | 1744 | health_error(); |
139ac872 MD |
1745 | ERR("Health error occurred in %s", __func__); |
1746 | } | |
8782cc74 | 1747 | health_unregister(health_sessiond); |
76d7553f | 1748 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1749 | rcu_thread_offline(); |
1750 | rcu_unregister_thread(); | |
099e26bd DG |
1751 | return NULL; |
1752 | } | |
1753 | ||
d0b96690 | 1754 | /* |
d88aee68 DG |
1755 | * Send a socket to a thread This is called from the dispatch UST registration |
1756 | * thread once all sockets are set for the application. | |
d0b96690 | 1757 | * |
b85dc84c DG |
1758 | * The sock value can be invalid, we don't really care, the thread will handle |
1759 | * it and make the necessary cleanup if so. | |
1760 | * | |
d0b96690 DG |
1761 | * On success, return 0 else a negative value being the errno message of the |
1762 | * write(). | |
1763 | */ | |
d88aee68 | 1764 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1765 | { |
6cd525e8 | 1766 | ssize_t ret; |
d0b96690 | 1767 | |
b85dc84c DG |
1768 | /* |
1769 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1770 | * before calling this function being a shutdown state of the thread. | |
1771 | */ | |
1772 | if (fd < 0) { | |
1773 | ret = -EBADF; | |
1774 | goto error; | |
1775 | } | |
d0b96690 | 1776 | |
6cd525e8 MD |
1777 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1778 | if (ret < sizeof(sock)) { | |
d88aee68 | 1779 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1780 | if (ret < 0) { |
1781 | ret = -errno; | |
1782 | } | |
1783 | goto error; | |
1784 | } | |
1785 | ||
1786 | /* All good. Don't send back the write positive ret value. */ | |
1787 | ret = 0; | |
1788 | error: | |
6cd525e8 | 1789 | return (int) ret; |
d0b96690 DG |
1790 | } |
1791 | ||
f45e313d DG |
1792 | /* |
1793 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1794 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1795 | * notify socket is never received. | |
1796 | */ | |
1797 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1798 | { | |
1799 | int ret, nb_fd = 0, i; | |
1800 | unsigned int fd_added = 0; | |
1801 | struct lttng_poll_event events; | |
1802 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1803 | ||
1804 | assert(wait_queue); | |
1805 | ||
1806 | lttng_poll_init(&events); | |
1807 | ||
1808 | /* Just skip everything for an empty queue. */ | |
1809 | if (!wait_queue->count) { | |
1810 | goto end; | |
1811 | } | |
1812 | ||
1813 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1814 | if (ret < 0) { | |
1815 | goto error_create; | |
1816 | } | |
1817 | ||
1818 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1819 | &wait_queue->head, head) { | |
1820 | assert(wait_node->app); | |
1821 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1822 | LPOLLHUP | LPOLLERR); | |
1823 | if (ret < 0) { | |
1824 | goto error; | |
1825 | } | |
1826 | ||
1827 | fd_added = 1; | |
1828 | } | |
1829 | ||
1830 | if (!fd_added) { | |
1831 | goto end; | |
1832 | } | |
1833 | ||
1834 | /* | |
1835 | * Poll but don't block so we can quickly identify the faulty events and | |
1836 | * clean them afterwards from the wait queue. | |
1837 | */ | |
1838 | ret = lttng_poll_wait(&events, 0); | |
1839 | if (ret < 0) { | |
1840 | goto error; | |
1841 | } | |
1842 | nb_fd = ret; | |
1843 | ||
1844 | for (i = 0; i < nb_fd; i++) { | |
1845 | /* Get faulty FD. */ | |
1846 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1847 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1848 | ||
fd20dac9 MD |
1849 | if (!revents) { |
1850 | /* No activity for this FD (poll implementation). */ | |
1851 | continue; | |
1852 | } | |
1853 | ||
f45e313d DG |
1854 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1855 | &wait_queue->head, head) { | |
1856 | if (pollfd == wait_node->app->sock && | |
1857 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1858 | cds_list_del(&wait_node->head); | |
1859 | wait_queue->count--; | |
1860 | ust_app_destroy(wait_node->app); | |
1861 | free(wait_node); | |
48b40bcf JG |
1862 | /* |
1863 | * Silence warning of use-after-free in | |
1864 | * cds_list_for_each_entry_safe which uses | |
1865 | * __typeof__(*wait_node). | |
1866 | */ | |
1867 | wait_node = NULL; | |
f45e313d | 1868 | break; |
03e43155 MD |
1869 | } else { |
1870 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1871 | goto error; | |
f45e313d DG |
1872 | } |
1873 | } | |
1874 | } | |
1875 | ||
1876 | if (nb_fd > 0) { | |
1877 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1878 | } | |
1879 | ||
1880 | end: | |
1881 | lttng_poll_clean(&events); | |
1882 | return; | |
1883 | ||
1884 | error: | |
1885 | lttng_poll_clean(&events); | |
1886 | error_create: | |
1887 | ERR("Unable to sanitize wait queue"); | |
1888 | return; | |
1889 | } | |
1890 | ||
099e26bd DG |
1891 | /* |
1892 | * Dispatch request from the registration threads to the application | |
1893 | * communication thread. | |
1894 | */ | |
1895 | static void *thread_dispatch_ust_registration(void *data) | |
1896 | { | |
12e2b881 | 1897 | int ret, err = -1; |
8bdee6e2 | 1898 | struct cds_wfcq_node *node; |
099e26bd | 1899 | struct ust_command *ust_cmd = NULL; |
f45e313d DG |
1900 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1901 | struct ust_reg_wait_queue wait_queue = { | |
1902 | .count = 0, | |
1903 | }; | |
d0b96690 | 1904 | |
322e7d38 MD |
1905 | rcu_register_thread(); |
1906 | ||
6c71277b | 1907 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1908 | |
9ad42ec1 MD |
1909 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1910 | goto error_testpoint; | |
1911 | } | |
1912 | ||
12e2b881 MD |
1913 | health_code_update(); |
1914 | ||
f45e313d | 1915 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1916 | |
1917 | DBG("[thread] Dispatch UST command started"); | |
1918 | ||
212a7c5f | 1919 | for (;;) { |
12e2b881 MD |
1920 | health_code_update(); |
1921 | ||
099e26bd DG |
1922 | /* Atomically prepare the queue futex */ |
1923 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1924 | ||
212a7c5f MD |
1925 | if (CMM_LOAD_SHARED(dispatch_thread_exit)) { |
1926 | break; | |
1927 | } | |
1928 | ||
099e26bd | 1929 | do { |
d0b96690 | 1930 | struct ust_app *app = NULL; |
7972aab2 | 1931 | ust_cmd = NULL; |
d0b96690 | 1932 | |
f45e313d DG |
1933 | /* |
1934 | * Make sure we don't have node(s) that have hung up before receiving | |
1935 | * the notify socket. This is to clean the list in order to avoid | |
1936 | * memory leaks from notify socket that are never seen. | |
1937 | */ | |
1938 | sanitize_wait_queue(&wait_queue); | |
1939 | ||
12e2b881 | 1940 | health_code_update(); |
099e26bd | 1941 | /* Dequeue command for registration */ |
8bdee6e2 | 1942 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1943 | if (node == NULL) { |
00a17c97 | 1944 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1945 | /* Continue thread execution */ |
1946 | break; | |
1947 | } | |
1948 | ||
1949 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1950 | ||
2f50c8a3 DG |
1951 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1952 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1953 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1954 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1955 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1956 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1957 | |
1958 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1959 | wait_node = zmalloc(sizeof(*wait_node)); | |
1960 | if (!wait_node) { | |
1961 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1962 | ret = close(ust_cmd->sock); |
1963 | if (ret < 0) { | |
1964 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1965 | } | |
51dec90d | 1966 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1967 | free(ust_cmd); |
d0b96690 DG |
1968 | goto error; |
1969 | } | |
1970 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1971 | ||
1972 | /* Create application object if socket is CMD. */ | |
1973 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1974 | ust_cmd->sock); | |
1975 | if (!wait_node->app) { | |
1976 | ret = close(ust_cmd->sock); | |
1977 | if (ret < 0) { | |
1978 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1979 | } |
51dec90d | 1980 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1981 | free(wait_node); |
7972aab2 | 1982 | free(ust_cmd); |
d0b96690 DG |
1983 | continue; |
1984 | } | |
1985 | /* | |
1986 | * Add application to the wait queue so we can set the notify | |
1987 | * socket before putting this object in the global ht. | |
1988 | */ | |
f45e313d DG |
1989 | cds_list_add(&wait_node->head, &wait_queue.head); |
1990 | wait_queue.count++; | |
d0b96690 | 1991 | |
7972aab2 | 1992 | free(ust_cmd); |
d0b96690 DG |
1993 | /* |
1994 | * We have to continue here since we don't have the notify | |
1995 | * socket and the application MUST be added to the hash table | |
1996 | * only at that moment. | |
1997 | */ | |
1998 | continue; | |
1999 | } else { | |
2000 | /* | |
2001 | * Look for the application in the local wait queue and set the | |
2002 | * notify socket if found. | |
2003 | */ | |
d88aee68 | 2004 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 2005 | &wait_queue.head, head) { |
12e2b881 | 2006 | health_code_update(); |
d0b96690 DG |
2007 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
2008 | wait_node->app->notify_sock = ust_cmd->sock; | |
2009 | cds_list_del(&wait_node->head); | |
f45e313d | 2010 | wait_queue.count--; |
d0b96690 DG |
2011 | app = wait_node->app; |
2012 | free(wait_node); | |
2013 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
2014 | break; | |
2015 | } | |
2016 | } | |
020d7f60 DG |
2017 | |
2018 | /* | |
2019 | * With no application at this stage the received socket is | |
2020 | * basically useless so close it before we free the cmd data | |
2021 | * structure for good. | |
2022 | */ | |
2023 | if (!app) { | |
2024 | ret = close(ust_cmd->sock); | |
2025 | if (ret < 0) { | |
2026 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
2027 | } | |
51dec90d | 2028 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 2029 | } |
7972aab2 | 2030 | free(ust_cmd); |
d0b96690 DG |
2031 | } |
2032 | ||
2033 | if (app) { | |
d0b96690 DG |
2034 | /* |
2035 | * @session_lock_list | |
2036 | * | |
2037 | * Lock the global session list so from the register up to the | |
2038 | * registration done message, no thread can see the application | |
2039 | * and change its state. | |
2040 | */ | |
2041 | session_lock_list(); | |
2042 | rcu_read_lock(); | |
d88aee68 | 2043 | |
d0b96690 DG |
2044 | /* |
2045 | * Add application to the global hash table. This needs to be | |
2046 | * done before the update to the UST registry can locate the | |
2047 | * application. | |
2048 | */ | |
2049 | ust_app_add(app); | |
d88aee68 DG |
2050 | |
2051 | /* Set app version. This call will print an error if needed. */ | |
2052 | (void) ust_app_version(app); | |
2053 | ||
2054 | /* Send notify socket through the notify pipe. */ | |
2055 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
2056 | app->notify_sock); | |
2057 | if (ret < 0) { | |
2058 | rcu_read_unlock(); | |
2059 | session_unlock_list(); | |
b85dc84c DG |
2060 | /* |
2061 | * No notify thread, stop the UST tracing. However, this is | |
2062 | * not an internal error of the this thread thus setting | |
2063 | * the health error code to a normal exit. | |
2064 | */ | |
2065 | err = 0; | |
d88aee68 | 2066 | goto error; |
6620da75 | 2067 | } |
d88aee68 | 2068 | |
d0b96690 DG |
2069 | /* |
2070 | * Update newly registered application with the tracing | |
2071 | * registry info already enabled information. | |
2072 | */ | |
2073 | update_ust_app(app->sock); | |
d88aee68 DG |
2074 | |
2075 | /* | |
2076 | * Don't care about return value. Let the manage apps threads | |
2077 | * handle app unregistration upon socket close. | |
2078 | */ | |
fb45065e | 2079 | (void) ust_app_register_done(app); |
d88aee68 DG |
2080 | |
2081 | /* | |
2082 | * Even if the application socket has been closed, send the app | |
2083 | * to the thread and unregistration will take place at that | |
2084 | * place. | |
2085 | */ | |
2086 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 2087 | if (ret < 0) { |
d88aee68 DG |
2088 | rcu_read_unlock(); |
2089 | session_unlock_list(); | |
b85dc84c DG |
2090 | /* |
2091 | * No apps. thread, stop the UST tracing. However, this is | |
2092 | * not an internal error of the this thread thus setting | |
2093 | * the health error code to a normal exit. | |
2094 | */ | |
2095 | err = 0; | |
d88aee68 | 2096 | goto error; |
d0b96690 | 2097 | } |
d88aee68 | 2098 | |
d0b96690 DG |
2099 | rcu_read_unlock(); |
2100 | session_unlock_list(); | |
099e26bd | 2101 | } |
099e26bd DG |
2102 | } while (node != NULL); |
2103 | ||
12e2b881 | 2104 | health_poll_entry(); |
099e26bd DG |
2105 | /* Futex wait on queue. Blocking call on futex() */ |
2106 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 2107 | health_poll_exit(); |
099e26bd | 2108 | } |
12e2b881 MD |
2109 | /* Normal exit, no error */ |
2110 | err = 0; | |
099e26bd DG |
2111 | |
2112 | error: | |
d88aee68 DG |
2113 | /* Clean up wait queue. */ |
2114 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 2115 | &wait_queue.head, head) { |
d88aee68 | 2116 | cds_list_del(&wait_node->head); |
f45e313d | 2117 | wait_queue.count--; |
d88aee68 DG |
2118 | free(wait_node); |
2119 | } | |
2120 | ||
772b8f4d MD |
2121 | /* Empty command queue. */ |
2122 | for (;;) { | |
2123 | /* Dequeue command for registration */ | |
2124 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); | |
2125 | if (node == NULL) { | |
2126 | break; | |
2127 | } | |
2128 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
2129 | ret = close(ust_cmd->sock); | |
2130 | if (ret < 0) { | |
2131 | PERROR("close ust sock exit dispatch %d", ust_cmd->sock); | |
2132 | } | |
2133 | lttng_fd_put(LTTNG_FD_APPS, 1); | |
2134 | free(ust_cmd); | |
2135 | } | |
2136 | ||
9ad42ec1 | 2137 | error_testpoint: |
099e26bd | 2138 | DBG("Dispatch thread dying"); |
12e2b881 MD |
2139 | if (err) { |
2140 | health_error(); | |
2141 | ERR("Health error occurred in %s", __func__); | |
2142 | } | |
8782cc74 | 2143 | health_unregister(health_sessiond); |
322e7d38 | 2144 | rcu_unregister_thread(); |
099e26bd DG |
2145 | return NULL; |
2146 | } | |
2147 | ||
2148 | /* | |
2149 | * This thread manage application registration. | |
2150 | */ | |
2151 | static void *thread_registration_apps(void *data) | |
1d4b027a | 2152 | { |
139ac872 | 2153 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
2154 | uint32_t revents, nb_fd; |
2155 | struct lttng_poll_event events; | |
099e26bd DG |
2156 | /* |
2157 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
2158 | * freed in the manage apps thread. | |
2159 | */ | |
2160 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 2161 | |
099e26bd | 2162 | DBG("[thread] Manage application registration started"); |
1d4b027a | 2163 | |
6c71277b | 2164 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 2165 | |
e547b070 | 2166 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
2167 | goto error_testpoint; |
2168 | } | |
8ac94142 | 2169 | |
1d4b027a DG |
2170 | ret = lttcomm_listen_unix_sock(apps_sock); |
2171 | if (ret < 0) { | |
76d7553f | 2172 | goto error_listen; |
1d4b027a DG |
2173 | } |
2174 | ||
5eb91c98 DG |
2175 | /* |
2176 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
2177 | * more will be added to this poll set. | |
2178 | */ | |
d0b96690 | 2179 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 2180 | if (ret < 0) { |
76d7553f | 2181 | goto error_create_poll; |
5eb91c98 | 2182 | } |
273ea72c | 2183 | |
5eb91c98 DG |
2184 | /* Add the application registration socket */ |
2185 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
2186 | if (ret < 0) { | |
76d7553f | 2187 | goto error_poll_add; |
5eb91c98 | 2188 | } |
273ea72c | 2189 | |
1d4b027a | 2190 | /* Notify all applications to register */ |
0fdd1e2c DG |
2191 | ret = notify_ust_apps(1); |
2192 | if (ret < 0) { | |
2193 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
2194 | "Execution continues but there might be problem for already\n" |
2195 | "running applications that wishes to register."); | |
0fdd1e2c | 2196 | } |
1d4b027a DG |
2197 | |
2198 | while (1) { | |
2199 | DBG("Accepting application registration"); | |
273ea72c DG |
2200 | |
2201 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 2202 | restart: |
a78af745 | 2203 | health_poll_entry(); |
5eb91c98 | 2204 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 2205 | health_poll_exit(); |
273ea72c | 2206 | if (ret < 0) { |
88f2b785 MD |
2207 | /* |
2208 | * Restart interrupted system call. | |
2209 | */ | |
2210 | if (errno == EINTR) { | |
2211 | goto restart; | |
2212 | } | |
273ea72c DG |
2213 | goto error; |
2214 | } | |
2215 | ||
0d9c5d77 DG |
2216 | nb_fd = ret; |
2217 | ||
5eb91c98 | 2218 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 2219 | health_code_update(); |
139ac872 | 2220 | |
5eb91c98 DG |
2221 | /* Fetch once the poll data */ |
2222 | revents = LTTNG_POLL_GETEV(&events, i); | |
2223 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 2224 | |
fd20dac9 MD |
2225 | if (!revents) { |
2226 | /* No activity for this FD (poll implementation). */ | |
2227 | continue; | |
2228 | } | |
2229 | ||
5eb91c98 | 2230 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 2231 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 2232 | if (ret) { |
139ac872 MD |
2233 | err = 0; |
2234 | goto exit; | |
90014c57 | 2235 | } |
1d4b027a | 2236 | |
5eb91c98 DG |
2237 | /* Event on the registration socket */ |
2238 | if (pollfd == apps_sock) { | |
03e43155 | 2239 | if (revents & LPOLLIN) { |
5eb91c98 DG |
2240 | sock = lttcomm_accept_unix_sock(apps_sock); |
2241 | if (sock < 0) { | |
2242 | goto error; | |
2243 | } | |
099e26bd | 2244 | |
16c5c8fa DG |
2245 | /* |
2246 | * Set socket timeout for both receiving and ending. | |
2247 | * app_socket_timeout is in seconds, whereas | |
2248 | * lttcomm_setsockopt_rcv_timeout and | |
2249 | * lttcomm_setsockopt_snd_timeout expect msec as | |
2250 | * parameter. | |
2251 | */ | |
9031b6b0 JG |
2252 | if (app_socket_timeout >= 0) { |
2253 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
2254 | app_socket_timeout * 1000); | |
2255 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
2256 | app_socket_timeout * 1000); | |
2257 | } | |
16c5c8fa | 2258 | |
b662582b DG |
2259 | /* |
2260 | * Set the CLOEXEC flag. Return code is useless because | |
2261 | * either way, the show must go on. | |
2262 | */ | |
2263 | (void) utils_set_fd_cloexec(sock); | |
2264 | ||
5eb91c98 | 2265 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 2266 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 2267 | if (ust_cmd == NULL) { |
76d7553f | 2268 | PERROR("ust command zmalloc"); |
41ed8e47 MD |
2269 | ret = close(sock); |
2270 | if (ret) { | |
2271 | PERROR("close"); | |
2272 | } | |
5eb91c98 DG |
2273 | goto error; |
2274 | } | |
1d4b027a | 2275 | |
5eb91c98 DG |
2276 | /* |
2277 | * Using message-based transmissions to ensure we don't | |
2278 | * have to deal with partially received messages. | |
2279 | */ | |
4063050c MD |
2280 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
2281 | if (ret < 0) { | |
2282 | ERR("Exhausted file descriptors allowed for applications."); | |
2283 | free(ust_cmd); | |
2284 | ret = close(sock); | |
2285 | if (ret) { | |
2286 | PERROR("close"); | |
2287 | } | |
2288 | sock = -1; | |
2289 | continue; | |
2290 | } | |
d88aee68 | 2291 | |
840cb59c | 2292 | health_code_update(); |
d0b96690 DG |
2293 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
2294 | if (ret < 0) { | |
5eb91c98 | 2295 | free(ust_cmd); |
d0b96690 | 2296 | /* Close socket of the application. */ |
76d7553f MD |
2297 | ret = close(sock); |
2298 | if (ret) { | |
2299 | PERROR("close"); | |
2300 | } | |
4063050c | 2301 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 2302 | sock = -1; |
5eb91c98 DG |
2303 | continue; |
2304 | } | |
840cb59c | 2305 | health_code_update(); |
099e26bd | 2306 | |
5eb91c98 | 2307 | ust_cmd->sock = sock; |
34a2494f | 2308 | sock = -1; |
099e26bd | 2309 | |
5eb91c98 DG |
2310 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2311 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2312 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2313 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2314 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2315 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2316 | |
5eb91c98 DG |
2317 | /* |
2318 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2319 | * has been taken! This apps will be part of the *system*. |
5eb91c98 | 2320 | */ |
8bdee6e2 | 2321 | cds_wfcq_enqueue(&ust_cmd_queue.head, &ust_cmd_queue.tail, &ust_cmd->node); |
5eb91c98 DG |
2322 | |
2323 | /* | |
2324 | * Wake the registration queue futex. Implicit memory | |
8bdee6e2 | 2325 | * barrier with the exchange in cds_wfcq_enqueue. |
5eb91c98 DG |
2326 | */ |
2327 | futex_nto1_wake(&ust_cmd_queue.futex); | |
03e43155 MD |
2328 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2329 | ERR("Register apps socket poll error"); | |
2330 | goto error; | |
2331 | } else { | |
2332 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2333 | goto error; | |
5eb91c98 DG |
2334 | } |
2335 | } | |
90014c57 | 2336 | } |
1d4b027a DG |
2337 | } |
2338 | ||
139ac872 | 2339 | exit: |
1d4b027a | 2340 | error: |
0fdd1e2c DG |
2341 | /* Notify that the registration thread is gone */ |
2342 | notify_ust_apps(0); | |
2343 | ||
a4b35e07 | 2344 | if (apps_sock >= 0) { |
76d7553f MD |
2345 | ret = close(apps_sock); |
2346 | if (ret) { | |
2347 | PERROR("close"); | |
2348 | } | |
a4b35e07 | 2349 | } |
46c3f085 | 2350 | if (sock >= 0) { |
76d7553f MD |
2351 | ret = close(sock); |
2352 | if (ret) { | |
2353 | PERROR("close"); | |
2354 | } | |
4063050c | 2355 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2356 | } |
273ea72c | 2357 | unlink(apps_unix_sock_path); |
0fdd1e2c | 2358 | |
76d7553f | 2359 | error_poll_add: |
5eb91c98 | 2360 | lttng_poll_clean(&events); |
76d7553f MD |
2361 | error_listen: |
2362 | error_create_poll: | |
6993eeb3 | 2363 | error_testpoint: |
76d7553f | 2364 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2365 | if (err) { |
2366 | health_error(); | |
2367 | ERR("Health error occurred in %s", __func__); | |
2368 | } | |
8782cc74 | 2369 | health_unregister(health_sessiond); |
5eb91c98 | 2370 | |
1d4b027a DG |
2371 | return NULL; |
2372 | } | |
2373 | ||
8c0faa1d | 2374 | /* |
3bd1e081 | 2375 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2376 | * exec or it will fails. |
8c0faa1d | 2377 | */ |
3bd1e081 | 2378 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2379 | { |
a23ec3a7 | 2380 | int ret, clock_ret; |
ee0b0061 DG |
2381 | struct timespec timeout; |
2382 | ||
a23ec3a7 DG |
2383 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
2384 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 2385 | |
a23ec3a7 DG |
2386 | /* Setup pthread condition */ |
2387 | ret = pthread_condattr_init(&consumer_data->condattr); | |
4a15001e | 2388 | if (ret) { |
a23ec3a7 DG |
2389 | errno = ret; |
2390 | PERROR("pthread_condattr_init consumer data"); | |
2391 | goto error; | |
2392 | } | |
2393 | ||
2394 | /* | |
2395 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2396 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2397 | * for a more details and how we noticed it. | |
2398 | */ | |
2399 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
4a15001e | 2400 | if (ret) { |
a23ec3a7 DG |
2401 | errno = ret; |
2402 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2403 | goto error; |
2404 | } | |
8c0faa1d | 2405 | |
a23ec3a7 | 2406 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
4a15001e | 2407 | if (ret) { |
a23ec3a7 DG |
2408 | errno = ret; |
2409 | PERROR("pthread_cond_init consumer data"); | |
2410 | goto error; | |
2411 | } | |
2412 | ||
2413 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
2414 | consumer_data); | |
4a15001e MD |
2415 | if (ret) { |
2416 | errno = ret; | |
3bd1e081 | 2417 | PERROR("pthread_create consumer"); |
ee0b0061 | 2418 | ret = -1; |
8c0faa1d DG |
2419 | goto error; |
2420 | } | |
2421 | ||
a23ec3a7 DG |
2422 | /* We are about to wait on a pthread condition */ |
2423 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2424 | ||
ee0b0061 | 2425 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
2426 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
2427 | /* | |
2428 | * Set the timeout for the condition timed wait even if the clock gettime | |
2429 | * call fails since we might loop on that call and we want to avoid to | |
2430 | * increment the timeout too many times. | |
2431 | */ | |
2432 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2433 | ||
2434 | /* | |
2435 | * The following loop COULD be skipped in some conditions so this is why we | |
2436 | * set ret to 0 in order to make sure at least one round of the loop is | |
2437 | * done. | |
2438 | */ | |
2439 | ret = 0; | |
2440 | ||
2441 | /* | |
2442 | * Loop until the condition is reached or when a timeout is reached. Note | |
2443 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2444 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2445 | * possible. This loop does not take any chances and works with both of | |
2446 | * them. | |
2447 | */ | |
2448 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2449 | if (clock_ret < 0) { | |
2450 | PERROR("clock_gettime spawn consumer"); | |
2451 | /* Infinite wait for the consumerd thread to be ready */ | |
2452 | ret = pthread_cond_wait(&consumer_data->cond, | |
2453 | &consumer_data->cond_mutex); | |
2454 | } else { | |
2455 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2456 | &consumer_data->cond_mutex, &timeout); | |
2457 | } | |
ee0b0061 | 2458 | } |
8c0faa1d | 2459 | |
a23ec3a7 DG |
2460 | /* Release the pthread condition */ |
2461 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2462 | ||
2463 | if (ret != 0) { | |
2464 | errno = ret; | |
2465 | if (ret == ETIMEDOUT) { | |
4282f9a3 DG |
2466 | int pth_ret; |
2467 | ||
ee0b0061 DG |
2468 | /* |
2469 | * Call has timed out so we kill the kconsumerd_thread and return | |
2470 | * an error. | |
2471 | */ | |
a23ec3a7 DG |
2472 | ERR("Condition timed out. The consumer thread was never ready." |
2473 | " Killing it"); | |
4282f9a3 DG |
2474 | pth_ret = pthread_cancel(consumer_data->thread); |
2475 | if (pth_ret < 0) { | |
3bd1e081 | 2476 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2477 | } |
2478 | } else { | |
a23ec3a7 | 2479 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 | 2480 | } |
4282f9a3 DG |
2481 | /* Caller is expecting a negative value on failure. */ |
2482 | ret = -1; | |
ee0b0061 DG |
2483 | goto error; |
2484 | } | |
2485 | ||
3bd1e081 MD |
2486 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2487 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2488 | ERR("Consumerd did not start"); |
3bd1e081 | 2489 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2490 | goto error; |
2491 | } | |
3bd1e081 | 2492 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2493 | |
8c0faa1d DG |
2494 | return 0; |
2495 | ||
2496 | error: | |
2497 | return ret; | |
2498 | } | |
2499 | ||
d9800920 | 2500 | /* |
3bd1e081 | 2501 | * Join consumer thread |
d9800920 | 2502 | */ |
3bd1e081 | 2503 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2504 | { |
2505 | void *status; | |
cf3af59e | 2506 | |
e8209f6b DG |
2507 | /* Consumer pid must be a real one. */ |
2508 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2509 | int ret; |
3bd1e081 | 2510 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2511 | if (ret) { |
4a15001e | 2512 | PERROR("Error killing consumer daemon"); |
cf3af59e MD |
2513 | return ret; |
2514 | } | |
3bd1e081 | 2515 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2516 | } else { |
2517 | return 0; | |
2518 | } | |
2519 | } | |
2520 | ||
8c0faa1d | 2521 | /* |
3bd1e081 | 2522 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2523 | * |
d063d709 | 2524 | * Return pid if successful else -1. |
8c0faa1d | 2525 | */ |
3bd1e081 | 2526 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2527 | { |
2528 | int ret; | |
2529 | pid_t pid; | |
94c55f17 | 2530 | const char *consumer_to_use; |
53086306 | 2531 | const char *verbosity; |
94c55f17 | 2532 | struct stat st; |
8c0faa1d | 2533 | |
3bd1e081 | 2534 | DBG("Spawning consumerd"); |
c49dc785 | 2535 | |
8c0faa1d DG |
2536 | pid = fork(); |
2537 | if (pid == 0) { | |
2538 | /* | |
3bd1e081 | 2539 | * Exec consumerd. |
8c0faa1d | 2540 | */ |
daee5345 | 2541 | if (opt_verbose_consumer) { |
53086306 | 2542 | verbosity = "--verbose"; |
4421f712 | 2543 | } else if (lttng_opt_quiet) { |
53086306 | 2544 | verbosity = "--quiet"; |
4421f712 DG |
2545 | } else { |
2546 | verbosity = ""; | |
53086306 | 2547 | } |
4421f712 | 2548 | |
3bd1e081 MD |
2549 | switch (consumer_data->type) { |
2550 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2551 | /* |
c7704d57 DG |
2552 | * Find out which consumerd to execute. We will first try the |
2553 | * 64-bit path, then the sessiond's installation directory, and | |
2554 | * fallback on the 32-bit one, | |
94c55f17 | 2555 | */ |
63a799e8 AM |
2556 | DBG3("Looking for a kernel consumer at these locations:"); |
2557 | DBG3(" 1) %s", consumerd64_bin); | |
2558 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
2559 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 2560 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 2561 | DBG3("Found location #1"); |
94c55f17 | 2562 | consumer_to_use = consumerd64_bin; |
94c55f17 | 2563 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 2564 | DBG3("Found location #2"); |
94c55f17 | 2565 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 2566 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 2567 | DBG3("Found location #3"); |
eb1e0bd4 | 2568 | consumer_to_use = consumerd32_bin; |
94c55f17 | 2569 | } else { |
63a799e8 | 2570 | DBG("Could not find any valid consumerd executable"); |
4282f9a3 | 2571 | ret = -EINVAL; |
6f386b41 | 2572 | goto error; |
94c55f17 AM |
2573 | } |
2574 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
4282f9a3 | 2575 | ret = execl(consumer_to_use, |
94c55f17 AM |
2576 | "lttng-consumerd", verbosity, "-k", |
2577 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2578 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2579 | "--group", tracing_group_name, |
94c55f17 | 2580 | NULL); |
3bd1e081 | 2581 | break; |
7753dea8 MD |
2582 | case LTTNG_CONSUMER64_UST: |
2583 | { | |
b1e0b6b6 | 2584 | char *tmpnew = NULL; |
8f4905da MD |
2585 | |
2586 | if (consumerd64_libdir[0] != '\0') { | |
2587 | char *tmp; | |
2588 | size_t tmplen; | |
2589 | ||
e8fa9fb0 | 2590 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2591 | if (!tmp) { |
2592 | tmp = ""; | |
2593 | } | |
2594 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2595 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
2596 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2597 | if (!tmpnew) { | |
2598 | ret = -ENOMEM; | |
2599 | goto error; | |
2600 | } | |
2601 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2602 | strcat(tmpnew, consumerd64_libdir); | |
2603 | if (tmp[0] != '\0') { | |
2604 | strcat(tmpnew, ":"); | |
2605 | strcat(tmpnew, tmp); | |
2606 | } | |
2607 | ret = putenv(tmpnew); | |
2608 | if (ret) { | |
2609 | ret = -errno; | |
c6f76da9 | 2610 | free(tmpnew); |
8f4905da MD |
2611 | goto error; |
2612 | } | |
2613 | } | |
94c55f17 | 2614 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 2615 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2616 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2617 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2618 | "--group", tracing_group_name, |
7753dea8 | 2619 | NULL); |
8f4905da MD |
2620 | if (consumerd64_libdir[0] != '\0') { |
2621 | free(tmpnew); | |
2622 | } | |
3bd1e081 | 2623 | break; |
7753dea8 MD |
2624 | } |
2625 | case LTTNG_CONSUMER32_UST: | |
2626 | { | |
937dde8e | 2627 | char *tmpnew = NULL; |
8f4905da MD |
2628 | |
2629 | if (consumerd32_libdir[0] != '\0') { | |
2630 | char *tmp; | |
2631 | size_t tmplen; | |
2632 | ||
e8fa9fb0 | 2633 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2634 | if (!tmp) { |
2635 | tmp = ""; | |
2636 | } | |
2637 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2638 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2639 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2640 | if (!tmpnew) { | |
2641 | ret = -ENOMEM; | |
2642 | goto error; | |
2643 | } | |
2644 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2645 | strcat(tmpnew, consumerd32_libdir); | |
2646 | if (tmp[0] != '\0') { | |
2647 | strcat(tmpnew, ":"); | |
2648 | strcat(tmpnew, tmp); | |
2649 | } | |
2650 | ret = putenv(tmpnew); | |
2651 | if (ret) { | |
2652 | ret = -errno; | |
c6f76da9 | 2653 | free(tmpnew); |
8f4905da MD |
2654 | goto error; |
2655 | } | |
2656 | } | |
94c55f17 | 2657 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 2658 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2659 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2660 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2661 | "--group", tracing_group_name, |
7753dea8 | 2662 | NULL); |
8f4905da MD |
2663 | if (consumerd32_libdir[0] != '\0') { |
2664 | free(tmpnew); | |
2665 | } | |
7753dea8 MD |
2666 | break; |
2667 | } | |
3bd1e081 | 2668 | default: |
76d7553f | 2669 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2670 | exit(EXIT_FAILURE); |
2671 | } | |
8c0faa1d | 2672 | if (errno != 0) { |
4282f9a3 | 2673 | PERROR("Consumer execl()"); |
8c0faa1d | 2674 | } |
4282f9a3 | 2675 | /* Reaching this point, we got a failure on our execl(). */ |
8c0faa1d DG |
2676 | exit(EXIT_FAILURE); |
2677 | } else if (pid > 0) { | |
2678 | ret = pid; | |
8c0faa1d | 2679 | } else { |
76d7553f | 2680 | PERROR("start consumer fork"); |
8c0faa1d | 2681 | ret = -errno; |
8c0faa1d | 2682 | } |
8f4905da | 2683 | error: |
8c0faa1d DG |
2684 | return ret; |
2685 | } | |
2686 | ||
693bd40b | 2687 | /* |
3bd1e081 | 2688 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2689 | */ |
3bd1e081 | 2690 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2691 | { |
c617c0c6 | 2692 | int ret; |
edb8b045 DG |
2693 | |
2694 | /* | |
2695 | * Set the listen() state on the socket since there is a possible race | |
2696 | * between the exec() of the consumer daemon and this call if place in the | |
2697 | * consumer thread. See bug #366 for more details. | |
2698 | */ | |
2699 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2700 | if (ret < 0) { | |
2701 | goto error; | |
2702 | } | |
693bd40b | 2703 | |
3bd1e081 MD |
2704 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2705 | if (consumer_data->pid != 0) { | |
2706 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2707 | goto end; |
2708 | } | |
693bd40b | 2709 | |
3bd1e081 | 2710 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2711 | if (ret < 0) { |
3bd1e081 MD |
2712 | ERR("Spawning consumerd failed"); |
2713 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2714 | goto error; |
693bd40b | 2715 | } |
c49dc785 | 2716 | |
3bd1e081 MD |
2717 | /* Setting up the consumer_data pid */ |
2718 | consumer_data->pid = ret; | |
48842b30 | 2719 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2720 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2721 | |
3bd1e081 MD |
2722 | DBG2("Spawning consumer control thread"); |
2723 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2724 | if (ret < 0) { |
3bd1e081 | 2725 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2726 | goto error; |
2727 | } | |
2728 | ||
c49dc785 | 2729 | end: |
693bd40b DG |
2730 | return 0; |
2731 | ||
2732 | error: | |
331744e3 | 2733 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2734 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2735 | int err; |
2736 | ||
edb8b045 DG |
2737 | err = close(consumer_data->err_sock); |
2738 | if (err < 0) { | |
2739 | PERROR("close consumer data error socket"); | |
2740 | } | |
2741 | } | |
693bd40b DG |
2742 | return ret; |
2743 | } | |
2744 | ||
b73401da | 2745 | /* |
096102bd | 2746 | * Setup necessary data for kernel tracer action. |
b73401da | 2747 | */ |
096102bd | 2748 | static int init_kernel_tracer(void) |
b73401da DG |
2749 | { |
2750 | int ret; | |
b73401da | 2751 | |
096102bd DG |
2752 | /* Modprobe lttng kernel modules */ |
2753 | ret = modprobe_lttng_control(); | |
b73401da | 2754 | if (ret < 0) { |
b73401da DG |
2755 | goto error; |
2756 | } | |
2757 | ||
096102bd DG |
2758 | /* Open debugfs lttng */ |
2759 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2760 | if (kernel_tracer_fd < 0) { | |
2761 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b | 2762 | goto error_open; |
54d01ffb DG |
2763 | } |
2764 | ||
2f77fc4b DG |
2765 | /* Validate kernel version */ |
2766 | ret = kernel_validate_version(kernel_tracer_fd); | |
2767 | if (ret < 0) { | |
2768 | goto error_version; | |
b551a063 | 2769 | } |
54d01ffb | 2770 | |
2f77fc4b DG |
2771 | ret = modprobe_lttng_data(); |
2772 | if (ret < 0) { | |
2773 | goto error_modules; | |
54d01ffb DG |
2774 | } |
2775 | ||
2f77fc4b DG |
2776 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2777 | return 0; | |
2778 | ||
2779 | error_version: | |
2780 | modprobe_remove_lttng_control(); | |
2781 | ret = close(kernel_tracer_fd); | |
2782 | if (ret) { | |
2783 | PERROR("close"); | |
b551a063 | 2784 | } |
2f77fc4b | 2785 | kernel_tracer_fd = -1; |
f73fabfd | 2786 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2787 | |
2f77fc4b DG |
2788 | error_modules: |
2789 | ret = close(kernel_tracer_fd); | |
2790 | if (ret) { | |
2791 | PERROR("close"); | |
b551a063 | 2792 | } |
54d01ffb | 2793 | |
2f77fc4b DG |
2794 | error_open: |
2795 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2796 | |
2797 | error: | |
2f77fc4b DG |
2798 | WARN("No kernel tracer available"); |
2799 | kernel_tracer_fd = -1; | |
2800 | if (!is_root) { | |
f73fabfd | 2801 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2802 | } else { |
f73fabfd | 2803 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2804 | } |
54d01ffb DG |
2805 | } |
2806 | ||
2f77fc4b | 2807 | |
54d01ffb | 2808 | /* |
2f77fc4b DG |
2809 | * Copy consumer output from the tracing session to the domain session. The |
2810 | * function also applies the right modification on a per domain basis for the | |
2811 | * trace files destination directory. | |
36b588ed MD |
2812 | * |
2813 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2814 | */ |
2f77fc4b | 2815 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2816 | { |
2817 | int ret; | |
2f77fc4b DG |
2818 | const char *dir_name; |
2819 | struct consumer_output *consumer; | |
2820 | ||
2821 | assert(session); | |
2822 | assert(session->consumer); | |
54d01ffb | 2823 | |
b551a063 DG |
2824 | switch (domain) { |
2825 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2826 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2827 | /* |
2828 | * XXX: We should audit the session creation and what this function | |
2829 | * does "extra" in order to avoid a destroy since this function is used | |
2830 | * in the domain session creation (kernel and ust) only. Same for UST | |
2831 | * domain. | |
2832 | */ | |
2833 | if (session->kernel_session->consumer) { | |
6addfa37 | 2834 | consumer_output_put(session->kernel_session->consumer); |
09a90bcd | 2835 | } |
2f77fc4b DG |
2836 | session->kernel_session->consumer = |
2837 | consumer_copy_output(session->consumer); | |
2838 | /* Ease our life a bit for the next part */ | |
2839 | consumer = session->kernel_session->consumer; | |
2840 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2841 | break; |
f20baf8e | 2842 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2843 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2844 | case LTTNG_DOMAIN_PYTHON: |
b551a063 | 2845 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2846 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd | 2847 | if (session->ust_session->consumer) { |
6addfa37 | 2848 | consumer_output_put(session->ust_session->consumer); |
09a90bcd | 2849 | } |
2f77fc4b DG |
2850 | session->ust_session->consumer = |
2851 | consumer_copy_output(session->consumer); | |
2852 | /* Ease our life a bit for the next part */ | |
2853 | consumer = session->ust_session->consumer; | |
2854 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2855 | break; |
2856 | default: | |
f73fabfd | 2857 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2858 | goto error; |
2859 | } | |
2860 | ||
2f77fc4b | 2861 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2862 | strncat(consumer->subdir, dir_name, |
2863 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2864 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2865 | ||
f73fabfd | 2866 | ret = LTTNG_OK; |
54d01ffb DG |
2867 | |
2868 | error: | |
2869 | return ret; | |
2870 | } | |
2871 | ||
00e2e675 | 2872 | /* |
2f77fc4b | 2873 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2874 | * |
2875 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2876 | */ |
2f77fc4b DG |
2877 | static int create_ust_session(struct ltt_session *session, |
2878 | struct lttng_domain *domain) | |
00e2e675 DG |
2879 | { |
2880 | int ret; | |
2f77fc4b | 2881 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2882 | |
a4b92340 | 2883 | assert(session); |
2f77fc4b DG |
2884 | assert(domain); |
2885 | assert(session->consumer); | |
a4b92340 | 2886 | |
2f77fc4b | 2887 | switch (domain->type) { |
f20baf8e | 2888 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2889 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2890 | case LTTNG_DOMAIN_PYTHON: |
2f77fc4b DG |
2891 | case LTTNG_DOMAIN_UST: |
2892 | break; | |
2893 | default: | |
2894 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2895 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2896 | goto error; |
2897 | } | |
2898 | ||
2f77fc4b DG |
2899 | DBG("Creating UST session"); |
2900 | ||
dec56f6c | 2901 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2902 | if (lus == NULL) { |
f73fabfd | 2903 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2904 | goto error; |
2905 | } | |
2906 | ||
2f77fc4b DG |
2907 | lus->uid = session->uid; |
2908 | lus->gid = session->gid; | |
2bba9e53 | 2909 | lus->output_traces = session->output_traces; |
27babd3a | 2910 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2911 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2912 | session->ust_session = lus; |
d7ba1388 | 2913 | if (session->shm_path[0]) { |
3d071855 MD |
2914 | strncpy(lus->root_shm_path, session->shm_path, |
2915 | sizeof(lus->root_shm_path)); | |
2916 | lus->root_shm_path[sizeof(lus->root_shm_path) - 1] = '\0'; | |
d7ba1388 MD |
2917 | strncpy(lus->shm_path, session->shm_path, |
2918 | sizeof(lus->shm_path)); | |
2919 | lus->shm_path[sizeof(lus->shm_path) - 1] = '\0'; | |
2920 | strncat(lus->shm_path, "/ust", | |
2921 | sizeof(lus->shm_path) - strlen(lus->shm_path) - 1); | |
2922 | } | |
2f77fc4b DG |
2923 | /* Copy session output to the newly created UST session */ |
2924 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2925 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2926 | goto error; |
2927 | } | |
2928 | ||
f73fabfd | 2929 | return LTTNG_OK; |
00e2e675 DG |
2930 | |
2931 | error: | |
2f77fc4b DG |
2932 | free(lus); |
2933 | session->ust_session = NULL; | |
00e2e675 DG |
2934 | return ret; |
2935 | } | |
2936 | ||
2937 | /* | |
2f77fc4b | 2938 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2939 | */ |
2f77fc4b | 2940 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2941 | { |
2942 | int ret; | |
a4b92340 | 2943 | |
2f77fc4b | 2944 | DBG("Creating kernel session"); |
00e2e675 | 2945 | |
2f77fc4b DG |
2946 | ret = kernel_create_session(session, kernel_tracer_fd); |
2947 | if (ret < 0) { | |
f73fabfd | 2948 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2949 | goto error; |
2950 | } | |
2951 | ||
2f77fc4b DG |
2952 | /* Code flow safety */ |
2953 | assert(session->kernel_session); | |
2954 | ||
2955 | /* Copy session output to the newly created Kernel session */ | |
2956 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2957 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2958 | goto error; |
2959 | } | |
2960 | ||
2f77fc4b DG |
2961 | /* Create directory(ies) on local filesystem. */ |
2962 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2963 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2964 | ret = run_as_mkdir_recursive( | |
2965 | session->kernel_session->consumer->dst.trace_path, | |
2966 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2967 | if (ret < 0) { | |
df5b86c8 | 2968 | if (errno != EEXIST) { |
2f77fc4b | 2969 | ERR("Trace directory creation error"); |
00e2e675 DG |
2970 | goto error; |
2971 | } | |
00e2e675 | 2972 | } |
2f77fc4b | 2973 | } |
00e2e675 | 2974 | |
2f77fc4b DG |
2975 | session->kernel_session->uid = session->uid; |
2976 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2977 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2978 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2979 | |
f73fabfd | 2980 | return LTTNG_OK; |
00e2e675 | 2981 | |
2f77fc4b DG |
2982 | error: |
2983 | trace_kernel_destroy_session(session->kernel_session); | |
2984 | session->kernel_session = NULL; | |
2985 | return ret; | |
2986 | } | |
00e2e675 | 2987 | |
2f77fc4b DG |
2988 | /* |
2989 | * Count number of session permitted by uid/gid. | |
2990 | */ | |
2991 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2992 | { | |
2993 | unsigned int i = 0; | |
2994 | struct ltt_session *session; | |
07424f16 | 2995 | |
2f77fc4b DG |
2996 | DBG("Counting number of available session for UID %d GID %d", |
2997 | uid, gid); | |
2998 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2999 | /* |
2f77fc4b | 3000 | * Only list the sessions the user can control. |
00e2e675 | 3001 | */ |
2f77fc4b DG |
3002 | if (!session_access_ok(session, uid, gid)) { |
3003 | continue; | |
3004 | } | |
3005 | i++; | |
a4b92340 | 3006 | } |
2f77fc4b | 3007 | return i; |
00e2e675 DG |
3008 | } |
3009 | ||
54d01ffb DG |
3010 | /* |
3011 | * Process the command requested by the lttng client within the command | |
3012 | * context structure. This function make sure that the return structure (llm) | |
3013 | * is set and ready for transmission before returning. | |
3014 | * | |
3015 | * Return any error encountered or 0 for success. | |
53a80697 MD |
3016 | * |
3017 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
3018 | * |
3019 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 3020 | */ |
53a80697 MD |
3021 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
3022 | int *sock_error) | |
54d01ffb | 3023 | { |
f73fabfd | 3024 | int ret = LTTNG_OK; |
44d3bd01 | 3025 | int need_tracing_session = 1; |
2e09ba09 | 3026 | int need_domain; |
54d01ffb DG |
3027 | |
3028 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
3029 | ||
3745d315 MD |
3030 | assert(!rcu_read_ongoing()); |
3031 | ||
53a80697 MD |
3032 | *sock_error = 0; |
3033 | ||
2e09ba09 MD |
3034 | switch (cmd_ctx->lsm->cmd_type) { |
3035 | case LTTNG_CREATE_SESSION: | |
27babd3a | 3036 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 3037 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
3038 | case LTTNG_DESTROY_SESSION: |
3039 | case LTTNG_LIST_SESSIONS: | |
3040 | case LTTNG_LIST_DOMAINS: | |
3041 | case LTTNG_START_TRACE: | |
3042 | case LTTNG_STOP_TRACE: | |
6d805429 | 3043 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
3044 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3045 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3046 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3047 | case LTTNG_SNAPSHOT_RECORD: | |
fb198a11 | 3048 | case LTTNG_SAVE_SESSION: |
d7ba1388 | 3049 | case LTTNG_SET_SESSION_SHM_PATH: |
93ec662e | 3050 | case LTTNG_METADATA_REGENERATE: |
2e09ba09 | 3051 | need_domain = 0; |
3aace903 | 3052 | break; |
2e09ba09 MD |
3053 | default: |
3054 | need_domain = 1; | |
3055 | } | |
3056 | ||
3057 | if (opt_no_kernel && need_domain | |
3058 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 3059 | if (!is_root) { |
f73fabfd | 3060 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 3061 | } else { |
f73fabfd | 3062 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 3063 | } |
4fba7219 DG |
3064 | goto error; |
3065 | } | |
3066 | ||
8d3113b2 DG |
3067 | /* Deny register consumer if we already have a spawned consumer. */ |
3068 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
3069 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
3070 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 3071 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 3072 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
3073 | goto error; |
3074 | } | |
3075 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
3076 | } | |
3077 | ||
54d01ffb DG |
3078 | /* |
3079 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 3080 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
3081 | * command. |
3082 | */ | |
3083 | switch(cmd_ctx->lsm->cmd_type) { | |
3084 | case LTTNG_LIST_SESSIONS: | |
3085 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 3086 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
3087 | case LTTNG_LIST_DOMAINS: |
3088 | case LTTNG_LIST_CHANNELS: | |
3089 | case LTTNG_LIST_EVENTS: | |
834978fd | 3090 | case LTTNG_LIST_SYSCALLS: |
a5dfbb9d | 3091 | case LTTNG_LIST_TRACKER_PIDS: |
29a58940 | 3092 | case LTTNG_DATA_PENDING: |
54d01ffb DG |
3093 | break; |
3094 | default: | |
3095 | /* Setup lttng message with no payload */ | |
6e10c9b9 | 3096 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0); |
54d01ffb DG |
3097 | if (ret < 0) { |
3098 | /* This label does not try to unlock the session */ | |
3099 | goto init_setup_error; | |
3100 | } | |
3101 | } | |
3102 | ||
3103 | /* Commands that DO NOT need a session. */ | |
3104 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 3105 | case LTTNG_CREATE_SESSION: |
27babd3a | 3106 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 3107 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 | 3108 | case LTTNG_CALIBRATE: |
54d01ffb DG |
3109 | case LTTNG_LIST_SESSIONS: |
3110 | case LTTNG_LIST_TRACEPOINTS: | |
834978fd | 3111 | case LTTNG_LIST_SYSCALLS: |
f37d259d | 3112 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
fb198a11 | 3113 | case LTTNG_SAVE_SESSION: |
44d3bd01 | 3114 | need_tracing_session = 0; |
54d01ffb DG |
3115 | break; |
3116 | default: | |
3117 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
3118 | /* |
3119 | * We keep the session list lock across _all_ commands | |
3120 | * for now, because the per-session lock does not | |
3121 | * handle teardown properly. | |
3122 | */ | |
74babd95 | 3123 | session_lock_list(); |
54d01ffb DG |
3124 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
3125 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 3126 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
3127 | goto error; |
3128 | } else { | |
3129 | /* Acquire lock for the session */ | |
3130 | session_lock(cmd_ctx->session); | |
3131 | } | |
3132 | break; | |
3133 | } | |
b389abbe | 3134 | |
5f3ecf22 DG |
3135 | /* |
3136 | * Commands that need a valid session but should NOT create one if none | |
3137 | * exists. Instead of creating one and destroying it when the command is | |
3138 | * handled, process that right before so we save some round trip in useless | |
3139 | * code path. | |
3140 | */ | |
3141 | switch (cmd_ctx->lsm->cmd_type) { | |
3142 | case LTTNG_DISABLE_CHANNEL: | |
3143 | case LTTNG_DISABLE_EVENT: | |
5f3ecf22 DG |
3144 | switch (cmd_ctx->lsm->domain.type) { |
3145 | case LTTNG_DOMAIN_KERNEL: | |
3146 | if (!cmd_ctx->session->kernel_session) { | |
3147 | ret = LTTNG_ERR_NO_CHANNEL; | |
3148 | goto error; | |
3149 | } | |
3150 | break; | |
3151 | case LTTNG_DOMAIN_JUL: | |
5cdb6027 | 3152 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3153 | case LTTNG_DOMAIN_PYTHON: |
5f3ecf22 DG |
3154 | case LTTNG_DOMAIN_UST: |
3155 | if (!cmd_ctx->session->ust_session) { | |
3156 | ret = LTTNG_ERR_NO_CHANNEL; | |
3157 | goto error; | |
3158 | } | |
3159 | break; | |
3160 | default: | |
3161 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3162 | goto error; | |
3163 | } | |
3164 | default: | |
3165 | break; | |
3166 | } | |
3167 | ||
2e09ba09 MD |
3168 | if (!need_domain) { |
3169 | goto skip_domain; | |
3170 | } | |
a4b92340 | 3171 | |
54d01ffb DG |
3172 | /* |
3173 | * Check domain type for specific "pre-action". | |
3174 | */ | |
3175 | switch (cmd_ctx->lsm->domain.type) { | |
3176 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 3177 | if (!is_root) { |
f73fabfd | 3178 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
3179 | goto error; |
3180 | } | |
3181 | ||
54d01ffb | 3182 | /* Kernel tracer check */ |
a4b35e07 | 3183 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3184 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3185 | ret = init_kernel_tracer(); |
3186 | if (ret != 0) { | |
54d01ffb DG |
3187 | goto error; |
3188 | } | |
3189 | } | |
5eb91c98 | 3190 | |
5c827ce0 DG |
3191 | /* Consumer is in an ERROR state. Report back to client */ |
3192 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3193 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3194 | goto error; |
3195 | } | |
3196 | ||
54d01ffb | 3197 | /* Need a session for kernel command */ |
44d3bd01 | 3198 | if (need_tracing_session) { |
54d01ffb | 3199 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3200 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3201 | if (ret < 0) { |
f73fabfd | 3202 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
3203 | goto error; |
3204 | } | |
b389abbe | 3205 | } |
7d29a247 | 3206 | |
54d01ffb | 3207 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3208 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3209 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 3210 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3211 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3212 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3213 | if (ret < 0) { |
f73fabfd | 3214 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 3215 | goto error; |
950131af | 3216 | } |
5c827ce0 | 3217 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
3218 | } else { |
3219 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3220 | } |
173af62f | 3221 | |
a4b92340 DG |
3222 | /* |
3223 | * The consumer was just spawned so we need to add the socket to | |
3224 | * the consumer output of the session if exist. | |
3225 | */ | |
3226 | ret = consumer_create_socket(&kconsumer_data, | |
3227 | cmd_ctx->session->kernel_session->consumer); | |
3228 | if (ret < 0) { | |
3229 | goto error; | |
173af62f | 3230 | } |
0d0c377a | 3231 | } |
5c827ce0 | 3232 | |
54d01ffb | 3233 | break; |
b9dfb167 | 3234 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3235 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3236 | case LTTNG_DOMAIN_PYTHON: |
2bdd86d4 | 3237 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3238 | { |
b51ec5b4 MD |
3239 | if (!ust_app_supported()) { |
3240 | ret = LTTNG_ERR_NO_UST; | |
3241 | goto error; | |
3242 | } | |
5c827ce0 DG |
3243 | /* Consumer is in an ERROR state. Report back to client */ |
3244 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3245 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3246 | goto error; |
3247 | } | |
3248 | ||
44d3bd01 | 3249 | if (need_tracing_session) { |
a4b92340 | 3250 | /* Create UST session if none exist. */ |
f6a9efaa | 3251 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3252 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3253 | &cmd_ctx->lsm->domain); |
f73fabfd | 3254 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
3255 | goto error; |
3256 | } | |
3257 | } | |
00e2e675 | 3258 | |
7753dea8 MD |
3259 | /* Start the UST consumer daemons */ |
3260 | /* 64-bit */ | |
3261 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 3262 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 3263 | ustconsumer64_data.pid == 0 && |
785d2d0d | 3264 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3265 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3266 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3267 | if (ret < 0) { |
f73fabfd | 3268 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 3269 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
3270 | goto error; |
3271 | } | |
48842b30 | 3272 | |
173af62f | 3273 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 3274 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3275 | } else { |
7753dea8 MD |
3276 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3277 | } | |
173af62f DG |
3278 | |
3279 | /* | |
3280 | * Setup socket for consumer 64 bit. No need for atomic access | |
3281 | * since it was set above and can ONLY be set in this thread. | |
3282 | */ | |
a4b92340 DG |
3283 | ret = consumer_create_socket(&ustconsumer64_data, |
3284 | cmd_ctx->session->ust_session->consumer); | |
3285 | if (ret < 0) { | |
3286 | goto error; | |
173af62f DG |
3287 | } |
3288 | ||
7753dea8 | 3289 | /* 32-bit */ |
385b881b | 3290 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); |
fc7a59ce | 3291 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 3292 | ustconsumer32_data.pid == 0 && |
785d2d0d | 3293 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3294 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
3295 | ret = start_consumerd(&ustconsumer32_data); | |
3296 | if (ret < 0) { | |
f73fabfd | 3297 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 3298 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
3299 | goto error; |
3300 | } | |
5c827ce0 | 3301 | |
173af62f | 3302 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 3303 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3304 | } else { |
3305 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3306 | } |
173af62f DG |
3307 | |
3308 | /* | |
3309 | * Setup socket for consumer 64 bit. No need for atomic access | |
3310 | * since it was set above and can ONLY be set in this thread. | |
3311 | */ | |
a4b92340 DG |
3312 | ret = consumer_create_socket(&ustconsumer32_data, |
3313 | cmd_ctx->session->ust_session->consumer); | |
3314 | if (ret < 0) { | |
3315 | goto error; | |
173af62f | 3316 | } |
44d3bd01 DG |
3317 | } |
3318 | break; | |
48842b30 | 3319 | } |
54d01ffb | 3320 | default: |
54d01ffb DG |
3321 | break; |
3322 | } | |
2e09ba09 | 3323 | skip_domain: |
33a2b854 | 3324 | |
5c827ce0 DG |
3325 | /* Validate consumer daemon state when start/stop trace command */ |
3326 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3327 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3328 | switch (cmd_ctx->lsm->domain.type) { | |
1a17cae8 JG |
3329 | case LTTNG_DOMAIN_NONE: |
3330 | break; | |
b9dfb167 | 3331 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3332 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3333 | case LTTNG_DOMAIN_PYTHON: |
5c827ce0 DG |
3334 | case LTTNG_DOMAIN_UST: |
3335 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3336 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3337 | goto error; |
3338 | } | |
3339 | break; | |
3340 | case LTTNG_DOMAIN_KERNEL: | |
3341 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3342 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3343 | goto error; |
3344 | } | |
3345 | break; | |
083c3f30 JG |
3346 | default: |
3347 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3348 | goto error; | |
5c827ce0 DG |
3349 | } |
3350 | } | |
3351 | ||
8e0af1b4 MD |
3352 | /* |
3353 | * Check that the UID or GID match that of the tracing session. | |
3354 | * The root user can interact with all sessions. | |
3355 | */ | |
3356 | if (need_tracing_session) { | |
3357 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3358 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3359 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 3360 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
3361 | goto error; |
3362 | } | |
3363 | } | |
3364 | ||
ffe60014 DG |
3365 | /* |
3366 | * Send relayd information to consumer as soon as we have a domain and a | |
3367 | * session defined. | |
3368 | */ | |
3369 | if (cmd_ctx->session && need_domain) { | |
3370 | /* | |
3371 | * Setup relayd if not done yet. If the relayd information was already | |
3372 | * sent to the consumer, this call will gracefully return. | |
3373 | */ | |
3374 | ret = cmd_setup_relayd(cmd_ctx->session); | |
3375 | if (ret != LTTNG_OK) { | |
3376 | goto error; | |
3377 | } | |
3378 | } | |
3379 | ||
54d01ffb DG |
3380 | /* Process by command type */ |
3381 | switch (cmd_ctx->lsm->cmd_type) { | |
3382 | case LTTNG_ADD_CONTEXT: | |
3383 | { | |
2001793c JG |
3384 | /* |
3385 | * An LTTNG_ADD_CONTEXT command might have a supplementary | |
3386 | * payload if the context being added is an application context. | |
3387 | */ | |
3388 | if (cmd_ctx->lsm->u.context.ctx.ctx == | |
3389 | LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
3390 | char *provider_name = NULL, *context_name = NULL; | |
3391 | size_t provider_name_len = | |
3392 | cmd_ctx->lsm->u.context.provider_name_len; | |
3393 | size_t context_name_len = | |
3394 | cmd_ctx->lsm->u.context.context_name_len; | |
3395 | ||
3396 | if (provider_name_len == 0 || context_name_len == 0) { | |
3397 | /* | |
3398 | * Application provider and context names MUST | |
3399 | * be provided. | |
3400 | */ | |
3401 | ret = -LTTNG_ERR_INVALID; | |
3402 | goto error; | |
3403 | } | |
3404 | ||
3405 | provider_name = zmalloc(provider_name_len + 1); | |
3406 | if (!provider_name) { | |
3407 | ret = -LTTNG_ERR_NOMEM; | |
3408 | goto error; | |
3409 | } | |
e0f4d107 JG |
3410 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = |
3411 | provider_name; | |
2001793c JG |
3412 | |
3413 | context_name = zmalloc(context_name_len + 1); | |
3414 | if (!context_name) { | |
3415 | ret = -LTTNG_ERR_NOMEM; | |
3416 | goto error_add_context; | |
3417 | } | |
e0f4d107 JG |
3418 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = |
3419 | context_name; | |
2001793c JG |
3420 | |
3421 | ret = lttcomm_recv_unix_sock(sock, provider_name, | |
3422 | provider_name_len); | |
3423 | if (ret < 0) { | |
3424 | goto error_add_context; | |
3425 | } | |
3426 | ||
3427 | ret = lttcomm_recv_unix_sock(sock, context_name, | |
3428 | context_name_len); | |
3429 | if (ret < 0) { | |
3430 | goto error_add_context; | |
3431 | } | |
2001793c JG |
3432 | } |
3433 | ||
3434 | /* | |
3435 | * cmd_add_context assumes ownership of the provider and context | |
3436 | * names. | |
3437 | */ | |
3438 | ret = cmd_add_context(cmd_ctx->session, | |
3439 | cmd_ctx->lsm->domain.type, | |
54d01ffb | 3440 | cmd_ctx->lsm->u.context.channel_name, |
2001793c JG |
3441 | &cmd_ctx->lsm->u.context.ctx, |
3442 | kernel_poll_pipe[1]); | |
3443 | ||
3444 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = NULL; | |
3445 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = NULL; | |
3446 | error_add_context: | |
3447 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name); | |
3448 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name); | |
3449 | if (ret < 0) { | |
3450 | goto error; | |
3451 | } | |
54d01ffb DG |
3452 | break; |
3453 | } | |
3454 | case LTTNG_DISABLE_CHANNEL: | |
3455 | { | |
3456 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3457 | cmd_ctx->lsm->u.disable.channel_name); | |
3458 | break; | |
3459 | } | |
3460 | case LTTNG_DISABLE_EVENT: | |
3461 | { | |
47b7e2f9 JG |
3462 | |
3463 | /* | |
3464 | * FIXME: handle filter; for now we just receive the filter's | |
3465 | * bytecode along with the filter expression which are sent by | |
3466 | * liblttng-ctl and discard them. | |
3467 | * | |
3468 | * This fixes an issue where the client may block while sending | |
3469 | * the filter payload and encounter an error because the session | |
3470 | * daemon closes the socket without ever handling this data. | |
3471 | */ | |
3472 | size_t count = cmd_ctx->lsm->u.disable.expression_len + | |
3473 | cmd_ctx->lsm->u.disable.bytecode_len; | |
3474 | ||
3475 | if (count) { | |
3476 | char data[LTTNG_FILTER_MAX_LEN]; | |
3477 | ||
3478 | DBG("Discarding disable event command payload of size %zu", count); | |
3479 | while (count) { | |
3480 | ret = lttcomm_recv_unix_sock(sock, data, | |
3481 | count > sizeof(data) ? sizeof(data) : count); | |
3482 | if (ret < 0) { | |
3483 | goto error; | |
3484 | } | |
3485 | ||
3486 | count -= (size_t) ret; | |
3487 | } | |
3488 | } | |
6e911cad | 3489 | /* FIXME: passing packed structure to non-packed pointer */ |
54d01ffb DG |
3490 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3491 | cmd_ctx->lsm->u.disable.channel_name, | |
6e911cad | 3492 | &cmd_ctx->lsm->u.disable.event); |
33a2b854 DG |
3493 | break; |
3494 | } | |
54d01ffb DG |
3495 | case LTTNG_ENABLE_CHANNEL: |
3496 | { | |
7972aab2 | 3497 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 3498 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
3499 | break; |
3500 | } | |
ccf10263 MD |
3501 | case LTTNG_TRACK_PID: |
3502 | { | |
3503 | ret = cmd_track_pid(cmd_ctx->session, | |
3504 | cmd_ctx->lsm->domain.type, | |
3505 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3506 | break; | |
3507 | } | |
3508 | case LTTNG_UNTRACK_PID: | |
3509 | { | |
3510 | ret = cmd_untrack_pid(cmd_ctx->session, | |
3511 | cmd_ctx->lsm->domain.type, | |
3512 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3513 | break; | |
3514 | } | |
54d01ffb DG |
3515 | case LTTNG_ENABLE_EVENT: |
3516 | { | |
882ef835 JI |
3517 | struct lttng_event_exclusion *exclusion = NULL; |
3518 | struct lttng_filter_bytecode *bytecode = NULL; | |
6b453b5e | 3519 | char *filter_expression = NULL; |
882ef835 | 3520 | |
67676bd8 DG |
3521 | /* Handle exclusion events and receive it from the client. */ |
3522 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3523 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3524 | ||
3525 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3526 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3527 | if (!exclusion) { | |
3528 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3529 | goto error; | |
882ef835 | 3530 | } |
882ef835 | 3531 | |
67676bd8 DG |
3532 | DBG("Receiving var len exclusion event list from client ..."); |
3533 | exclusion->count = count; | |
3534 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3535 | count * LTTNG_SYMBOL_NAME_LEN); | |
3536 | if (ret <= 0) { | |
3537 | DBG("Nothing recv() from client var len data... continuing"); | |
3538 | *sock_error = 1; | |
3539 | free(exclusion); | |
3540 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3541 | goto error; | |
3542 | } | |
3543 | } | |
3544 | ||
6b453b5e JG |
3545 | /* Get filter expression from client. */ |
3546 | if (cmd_ctx->lsm->u.enable.expression_len > 0) { | |
3547 | size_t expression_len = | |
3548 | cmd_ctx->lsm->u.enable.expression_len; | |
3549 | ||
3550 | if (expression_len > LTTNG_FILTER_MAX_LEN) { | |
3551 | ret = LTTNG_ERR_FILTER_INVAL; | |
3552 | free(exclusion); | |
3553 | goto error; | |
3554 | } | |
3555 | ||
3556 | filter_expression = zmalloc(expression_len); | |
3557 | if (!filter_expression) { | |
3558 | free(exclusion); | |
3559 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3560 | goto error; | |
3561 | } | |
3562 | ||
3563 | /* Receive var. len. data */ | |
3564 | DBG("Receiving var len filter's expression from client ..."); | |
3565 | ret = lttcomm_recv_unix_sock(sock, filter_expression, | |
3566 | expression_len); | |
3567 | if (ret <= 0) { | |
3568 | DBG("Nothing recv() from client car len data... continuing"); | |
3569 | *sock_error = 1; | |
3570 | free(filter_expression); | |
3571 | free(exclusion); | |
3572 | ret = LTTNG_ERR_FILTER_INVAL; | |
3573 | goto error; | |
3574 | } | |
3575 | } | |
3576 | ||
67676bd8 DG |
3577 | /* Handle filter and get bytecode from client. */ |
3578 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3579 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3580 | ||
3581 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3582 | ret = LTTNG_ERR_FILTER_INVAL; | |
49d21f93 | 3583 | free(filter_expression); |
67676bd8 DG |
3584 | free(exclusion); |
3585 | goto error; | |
3586 | } | |
3587 | ||
3588 | bytecode = zmalloc(bytecode_len); | |
3589 | if (!bytecode) { | |
49d21f93 | 3590 | free(filter_expression); |
67676bd8 DG |
3591 | free(exclusion); |
3592 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3593 | goto error; | |
882ef835 JI |
3594 | } |
3595 | ||
67676bd8 DG |
3596 | /* Receive var. len. data */ |
3597 | DBG("Receiving var len filter's bytecode from client ..."); | |
3598 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3599 | if (ret <= 0) { | |
3600 | DBG("Nothing recv() from client car len data... continuing"); | |
3601 | *sock_error = 1; | |
49d21f93 | 3602 | free(filter_expression); |
67676bd8 DG |
3603 | free(bytecode); |
3604 | free(exclusion); | |
3605 | ret = LTTNG_ERR_FILTER_INVAL; | |
3606 | goto error; | |
3607 | } | |
3608 | ||
3609 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
49d21f93 | 3610 | free(filter_expression); |
67676bd8 DG |
3611 | free(bytecode); |
3612 | free(exclusion); | |
3613 | ret = LTTNG_ERR_FILTER_INVAL; | |
3614 | goto error; | |
3615 | } | |
882ef835 | 3616 | } |
67676bd8 DG |
3617 | |
3618 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3619 | cmd_ctx->lsm->u.enable.channel_name, | |
6b453b5e JG |
3620 | &cmd_ctx->lsm->u.enable.event, |
3621 | filter_expression, bytecode, exclusion, | |
67676bd8 | 3622 | kernel_poll_pipe[1]); |
54d01ffb DG |
3623 | break; |
3624 | } | |
052da939 | 3625 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3626 | { |
9f19cc17 | 3627 | struct lttng_event *events; |
54d01ffb | 3628 | ssize_t nb_events; |
052da939 | 3629 | |
0845bbfa | 3630 | session_lock_list(); |
54d01ffb | 3631 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
0845bbfa | 3632 | session_unlock_list(); |
54d01ffb | 3633 | if (nb_events < 0) { |
f73fabfd | 3634 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3635 | ret = -nb_events; |
3636 | goto error; | |
2ef84c95 DG |
3637 | } |
3638 | ||
3639 | /* | |
3640 | * Setup lttng message with payload size set to the event list size in | |
3641 | * bytes and then copy list into the llm payload. | |
3642 | */ | |
6e10c9b9 PP |
3643 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3644 | sizeof(struct lttng_event) * nb_events); | |
3645 | free(events); | |
3646 | ||
2ef84c95 DG |
3647 | if (ret < 0) { |
3648 | goto setup_error; | |
3649 | } | |
3650 | ||
f73fabfd | 3651 | ret = LTTNG_OK; |
2ef84c95 DG |
3652 | break; |
3653 | } | |
f37d259d MD |
3654 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3655 | { | |
3656 | struct lttng_event_field *fields; | |
3657 | ssize_t nb_fields; | |
3658 | ||
0845bbfa | 3659 | session_lock_list(); |
a4b92340 DG |
3660 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3661 | &fields); | |
0845bbfa | 3662 | session_unlock_list(); |
f37d259d | 3663 | if (nb_fields < 0) { |
f73fabfd | 3664 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3665 | ret = -nb_fields; |
3666 | goto error; | |
3667 | } | |
3668 | ||
3669 | /* | |
3670 | * Setup lttng message with payload size set to the event list size in | |
3671 | * bytes and then copy list into the llm payload. | |
3672 | */ | |
6e10c9b9 | 3673 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, fields, |
a4b92340 | 3674 | sizeof(struct lttng_event_field) * nb_fields); |
6e10c9b9 PP |
3675 | free(fields); |
3676 | ||
f37d259d | 3677 | if (ret < 0) { |
f37d259d MD |
3678 | goto setup_error; |
3679 | } | |
3680 | ||
f73fabfd | 3681 | ret = LTTNG_OK; |
f37d259d MD |
3682 | break; |
3683 | } | |
834978fd DG |
3684 | case LTTNG_LIST_SYSCALLS: |
3685 | { | |
3686 | struct lttng_event *events; | |
3687 | ssize_t nb_events; | |
3688 | ||
3689 | nb_events = cmd_list_syscalls(&events); | |
3690 | if (nb_events < 0) { | |
3691 | /* Return value is a negative lttng_error_code. */ | |
3692 | ret = -nb_events; | |
3693 | goto error; | |
3694 | } | |
3695 | ||
3696 | /* | |
3697 | * Setup lttng message with payload size set to the event list size in | |
3698 | * bytes and then copy list into the llm payload. | |
3699 | */ | |
6e10c9b9 PP |
3700 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3701 | sizeof(struct lttng_event) * nb_events); | |
3702 | free(events); | |
3703 | ||
834978fd | 3704 | if (ret < 0) { |
834978fd DG |
3705 | goto setup_error; |
3706 | } | |
3707 | ||
834978fd DG |
3708 | ret = LTTNG_OK; |
3709 | break; | |
3710 | } | |
a5dfbb9d MD |
3711 | case LTTNG_LIST_TRACKER_PIDS: |
3712 | { | |
3713 | int32_t *pids = NULL; | |
3714 | ssize_t nr_pids; | |
3715 | ||
3716 | nr_pids = cmd_list_tracker_pids(cmd_ctx->session, | |
3717 | cmd_ctx->lsm->domain.type, &pids); | |
3718 | if (nr_pids < 0) { | |
3719 | /* Return value is a negative lttng_error_code. */ | |
3720 | ret = -nr_pids; | |
3721 | goto error; | |
3722 | } | |
3723 | ||
3724 | /* | |
3725 | * Setup lttng message with payload size set to the event list size in | |
3726 | * bytes and then copy list into the llm payload. | |
3727 | */ | |
6e10c9b9 PP |
3728 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, pids, |
3729 | sizeof(int32_t) * nr_pids); | |
3730 | free(pids); | |
3731 | ||
a5dfbb9d | 3732 | if (ret < 0) { |
a5dfbb9d MD |
3733 | goto setup_error; |
3734 | } | |
3735 | ||
a5dfbb9d MD |
3736 | ret = LTTNG_OK; |
3737 | break; | |
3738 | } | |
00e2e675 DG |
3739 | case LTTNG_SET_CONSUMER_URI: |
3740 | { | |
a4b92340 DG |
3741 | size_t nb_uri, len; |
3742 | struct lttng_uri *uris; | |
3743 | ||
3744 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3745 | len = nb_uri * sizeof(struct lttng_uri); | |
3746 | ||
3747 | if (nb_uri == 0) { | |
f73fabfd | 3748 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3749 | goto error; |
3750 | } | |
3751 | ||
3752 | uris = zmalloc(len); | |
3753 | if (uris == NULL) { | |
f73fabfd | 3754 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3755 | goto error; |
3756 | } | |
3757 | ||
3758 | /* Receive variable len data */ | |
77c7c900 | 3759 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3760 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3761 | if (ret <= 0) { | |
3762 | DBG("No URIs received from client... continuing"); | |
3763 | *sock_error = 1; | |
f73fabfd | 3764 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3765 | free(uris); |
a4b92340 DG |
3766 | goto error; |
3767 | } | |
3768 | ||
bda32d56 JG |
3769 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); |
3770 | free(uris); | |
f73fabfd | 3771 | if (ret != LTTNG_OK) { |
a4b92340 DG |
3772 | goto error; |
3773 | } | |
3774 | ||
b1d41407 | 3775 | |
00e2e675 DG |
3776 | break; |
3777 | } | |
f3ed775e | 3778 | case LTTNG_START_TRACE: |
8c0faa1d | 3779 | { |
54d01ffb | 3780 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3781 | break; |
3782 | } | |
f3ed775e | 3783 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3784 | { |
54d01ffb | 3785 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3786 | break; |
3787 | } | |
5e16da05 MD |
3788 | case LTTNG_CREATE_SESSION: |
3789 | { | |
a4b92340 DG |
3790 | size_t nb_uri, len; |
3791 | struct lttng_uri *uris = NULL; | |
3792 | ||
3793 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3794 | len = nb_uri * sizeof(struct lttng_uri); | |
3795 | ||
3796 | if (nb_uri > 0) { | |
3797 | uris = zmalloc(len); | |
3798 | if (uris == NULL) { | |
f73fabfd | 3799 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3800 | goto error; |
3801 | } | |
3802 | ||
3803 | /* Receive variable len data */ | |
77c7c900 | 3804 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3805 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3806 | if (ret <= 0) { | |
3807 | DBG("No URIs received from client... continuing"); | |
3808 | *sock_error = 1; | |
f73fabfd | 3809 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3810 | free(uris); |
a4b92340 DG |
3811 | goto error; |
3812 | } | |
3813 | ||
3814 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3815 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3816 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3817 | free(uris); |
a4b92340 DG |
3818 | goto error; |
3819 | } | |
3820 | } | |
3821 | ||
3822 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3823 | &cmd_ctx->creds, 0); |
a4b92340 | 3824 | |
b1d41407 DG |
3825 | free(uris); |
3826 | ||
00e2e675 DG |
3827 | break; |
3828 | } | |
5e16da05 MD |
3829 | case LTTNG_DESTROY_SESSION: |
3830 | { | |
2f77fc4b | 3831 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3832 | |
3833 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3834 | cmd_ctx->session = NULL; |
5461b305 | 3835 | break; |
5e16da05 | 3836 | } |
9f19cc17 | 3837 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3838 | { |
54d01ffb | 3839 | ssize_t nb_dom; |
fa64dfb4 | 3840 | struct lttng_domain *domains = NULL; |
5461b305 | 3841 | |
54d01ffb DG |
3842 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3843 | if (nb_dom < 0) { | |
f73fabfd | 3844 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3845 | ret = -nb_dom; |
3846 | goto error; | |
ce3d728c | 3847 | } |
520ff687 | 3848 | |
6e10c9b9 PP |
3849 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, domains, |
3850 | nb_dom * sizeof(struct lttng_domain)); | |
3851 | free(domains); | |
3852 | ||
5461b305 DG |
3853 | if (ret < 0) { |
3854 | goto setup_error; | |
520ff687 | 3855 | } |
57167058 | 3856 | |
f73fabfd | 3857 | ret = LTTNG_OK; |
5e16da05 MD |
3858 | break; |
3859 | } | |
9f19cc17 | 3860 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3861 | { |
53e367f9 | 3862 | ssize_t payload_size; |
ade7ce52 | 3863 | struct lttng_channel *channels = NULL; |
54d01ffb | 3864 | |
53e367f9 | 3865 | payload_size = cmd_list_channels(cmd_ctx->lsm->domain.type, |
b551a063 | 3866 | cmd_ctx->session, &channels); |
53e367f9 | 3867 | if (payload_size < 0) { |
f73fabfd | 3868 | /* Return value is a negative lttng_error_code. */ |
53e367f9 | 3869 | ret = -payload_size; |
54d01ffb | 3870 | goto error; |
5461b305 | 3871 | } |
ca95a216 | 3872 | |
6e10c9b9 | 3873 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, channels, |
53e367f9 | 3874 | payload_size); |
6e10c9b9 PP |
3875 | free(channels); |
3876 | ||
5461b305 DG |
3877 | if (ret < 0) { |
3878 | goto setup_error; | |
3879 | } | |
9f19cc17 | 3880 | |
f73fabfd | 3881 | ret = LTTNG_OK; |
5461b305 | 3882 | break; |
5e16da05 | 3883 | } |
9f19cc17 | 3884 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3885 | { |
b551a063 | 3886 | ssize_t nb_event; |
684d34d2 | 3887 | struct lttng_event *events = NULL; |
b4e3ceb9 PP |
3888 | struct lttcomm_event_command_header cmd_header; |
3889 | size_t total_size; | |
3890 | ||
b2d66287 | 3891 | memset(&cmd_header, 0, sizeof(cmd_header)); |
b4e3ceb9 PP |
3892 | /* Extended infos are included at the end of events */ |
3893 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, | |
3894 | cmd_ctx->session, cmd_ctx->lsm->u.list.channel_name, | |
3895 | &events, &total_size); | |
9f19cc17 | 3896 | |
54d01ffb | 3897 | if (nb_event < 0) { |
f73fabfd | 3898 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3899 | ret = -nb_event; |
3900 | goto error; | |
5461b305 | 3901 | } |
ca95a216 | 3902 | |
b4e3ceb9 PP |
3903 | cmd_header.nb_events = nb_event; |
3904 | ret = setup_lttng_msg(cmd_ctx, events, total_size, | |
3905 | &cmd_header, sizeof(cmd_header)); | |
6e10c9b9 PP |
3906 | free(events); |
3907 | ||
5461b305 DG |
3908 | if (ret < 0) { |
3909 | goto setup_error; | |
3910 | } | |
9f19cc17 | 3911 | |
f73fabfd | 3912 | ret = LTTNG_OK; |
5461b305 | 3913 | break; |
5e16da05 MD |
3914 | } |
3915 | case LTTNG_LIST_SESSIONS: | |
3916 | { | |
8e0af1b4 | 3917 | unsigned int nr_sessions; |
6e10c9b9 PP |
3918 | void *sessions_payload; |
3919 | size_t payload_len; | |
5461b305 | 3920 | |
8e0af1b4 | 3921 | session_lock_list(); |
730389d9 DG |
3922 | nr_sessions = lttng_sessions_count( |
3923 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3924 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6e10c9b9 PP |
3925 | payload_len = sizeof(struct lttng_session) * nr_sessions; |
3926 | sessions_payload = zmalloc(payload_len); | |
d32fb093 | 3927 | |
6e10c9b9 | 3928 | if (!sessions_payload) { |
54d01ffb | 3929 | session_unlock_list(); |
6e10c9b9 | 3930 | ret = -ENOMEM; |
5461b305 | 3931 | goto setup_error; |
e065084a | 3932 | } |
5e16da05 | 3933 | |
6e10c9b9 | 3934 | cmd_list_lttng_sessions(sessions_payload, |
730389d9 DG |
3935 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3936 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
54d01ffb | 3937 | session_unlock_list(); |
5e16da05 | 3938 | |
6e10c9b9 PP |
3939 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, sessions_payload, |
3940 | payload_len); | |
3941 | free(sessions_payload); | |
3942 | ||
3943 | if (ret < 0) { | |
3944 | goto setup_error; | |
3945 | } | |
3946 | ||
f73fabfd | 3947 | ret = LTTNG_OK; |
5e16da05 MD |
3948 | break; |
3949 | } | |
d0254c7c MD |
3950 | case LTTNG_CALIBRATE: |
3951 | { | |
54d01ffb DG |
3952 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3953 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3954 | break; |
3955 | } | |
d9800920 DG |
3956 | case LTTNG_REGISTER_CONSUMER: |
3957 | { | |
2f77fc4b DG |
3958 | struct consumer_data *cdata; |
3959 | ||
3960 | switch (cmd_ctx->lsm->domain.type) { | |
3961 | case LTTNG_DOMAIN_KERNEL: | |
3962 | cdata = &kconsumer_data; | |
3963 | break; | |
3964 | default: | |
f73fabfd | 3965 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3966 | goto error; |
3967 | } | |
3968 | ||
54d01ffb | 3969 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3970 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3971 | break; |
3972 | } | |
6d805429 | 3973 | case LTTNG_DATA_PENDING: |
806e2684 | 3974 | { |
f6151c55 | 3975 | int pending_ret; |
6e10c9b9 | 3976 | uint8_t pending_ret_byte; |
f6151c55 JG |
3977 | |
3978 | pending_ret = cmd_data_pending(cmd_ctx->session); | |
6e10c9b9 | 3979 | |
f6151c55 JG |
3980 | /* |
3981 | * FIXME | |
3982 | * | |
3983 | * This function may returns 0 or 1 to indicate whether or not | |
3984 | * there is data pending. In case of error, it should return an | |
3985 | * LTTNG_ERR code. However, some code paths may still return | |
3986 | * a nondescript error code, which we handle by returning an | |
3987 | * "unknown" error. | |
3988 | */ | |
3989 | if (pending_ret == 0 || pending_ret == 1) { | |
6e10c9b9 PP |
3990 | /* |
3991 | * ret will be set to LTTNG_OK at the end of | |
3992 | * this function. | |
3993 | */ | |
f6151c55 JG |
3994 | } else if (pending_ret < 0) { |
3995 | ret = LTTNG_ERR_UNK; | |
3996 | goto setup_error; | |
3997 | } else { | |
3998 | ret = pending_ret; | |
3999 | goto setup_error; | |
4000 | } | |
4001 | ||
6e10c9b9 PP |
4002 | pending_ret_byte = (uint8_t) pending_ret; |
4003 | ||
4004 | /* 1 byte to return whether or not data is pending */ | |
4005 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, | |
4006 | &pending_ret_byte, 1); | |
4007 | ||
4008 | if (ret < 0) { | |
4009 | goto setup_error; | |
4010 | } | |
4011 | ||
4012 | ret = LTTNG_OK; | |
806e2684 DG |
4013 | break; |
4014 | } | |
da3c9ec1 DG |
4015 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
4016 | { | |
6dc3064a DG |
4017 | struct lttcomm_lttng_output_id reply; |
4018 | ||
4019 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
4020 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
4021 | if (ret != LTTNG_OK) { | |
4022 | goto error; | |
4023 | } | |
4024 | ||
6e10c9b9 PP |
4025 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &reply, |
4026 | sizeof(reply)); | |
6dc3064a DG |
4027 | if (ret < 0) { |
4028 | goto setup_error; | |
4029 | } | |
4030 | ||
4031 | /* Copy output list into message payload */ | |
6dc3064a | 4032 | ret = LTTNG_OK; |
da3c9ec1 DG |
4033 | break; |
4034 | } | |
4035 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
4036 | { | |
6dc3064a DG |
4037 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
4038 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
4039 | break; |
4040 | } | |
4041 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
4042 | { | |
6dc3064a DG |
4043 | ssize_t nb_output; |
4044 | struct lttng_snapshot_output *outputs = NULL; | |
4045 | ||
4046 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
4047 | if (nb_output < 0) { | |
4048 | ret = -nb_output; | |
4049 | goto error; | |
4050 | } | |
4051 | ||
6e10c9b9 PP |
4052 | assert((nb_output > 0 && outputs) || nb_output == 0); |
4053 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, outputs, | |
6dc3064a | 4054 | nb_output * sizeof(struct lttng_snapshot_output)); |
6e10c9b9 PP |
4055 | free(outputs); |
4056 | ||
6dc3064a | 4057 | if (ret < 0) { |
6dc3064a DG |
4058 | goto setup_error; |
4059 | } | |
4060 | ||
6dc3064a | 4061 | ret = LTTNG_OK; |
da3c9ec1 DG |
4062 | break; |
4063 | } | |
4064 | case LTTNG_SNAPSHOT_RECORD: | |
4065 | { | |
6dc3064a DG |
4066 | ret = cmd_snapshot_record(cmd_ctx->session, |
4067 | &cmd_ctx->lsm->u.snapshot_record.output, | |
4068 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
4069 | break; |
4070 | } | |
27babd3a DG |
4071 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
4072 | { | |
4073 | size_t nb_uri, len; | |
4074 | struct lttng_uri *uris = NULL; | |
4075 | ||
4076 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4077 | len = nb_uri * sizeof(struct lttng_uri); | |
4078 | ||
4079 | if (nb_uri > 0) { | |
4080 | uris = zmalloc(len); | |
4081 | if (uris == NULL) { | |
4082 | ret = LTTNG_ERR_FATAL; | |
4083 | goto error; | |
4084 | } | |
4085 | ||
4086 | /* Receive variable len data */ | |
4087 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
4088 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
4089 | if (ret <= 0) { | |
4090 | DBG("No URIs received from client... continuing"); | |
4091 | *sock_error = 1; | |
4092 | ret = LTTNG_ERR_SESSION_FAIL; | |
4093 | free(uris); | |
4094 | goto error; | |
4095 | } | |
4096 | ||
4097 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4098 | DBG("Creating session with ONE network URI is a bad call"); | |
4099 | ret = LTTNG_ERR_SESSION_FAIL; | |
4100 | free(uris); | |
4101 | goto error; | |
4102 | } | |
4103 | } | |
4104 | ||
4105 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
4106 | nb_uri, &cmd_ctx->creds); | |
4107 | free(uris); | |
4108 | break; | |
4109 | } | |
ecc48a90 JD |
4110 | case LTTNG_CREATE_SESSION_LIVE: |
4111 | { | |
4112 | size_t nb_uri, len; | |
4113 | struct lttng_uri *uris = NULL; | |
4114 | ||
4115 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4116 | len = nb_uri * sizeof(struct lttng_uri); | |
4117 | ||
4118 | if (nb_uri > 0) { | |
4119 | uris = zmalloc(len); | |
4120 | if (uris == NULL) { | |
4121 | ret = LTTNG_ERR_FATAL; | |
4122 | goto error; | |
4123 | } | |
4124 | ||
4125 | /* Receive variable len data */ | |
4126 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
4127 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
4128 | if (ret <= 0) { | |
4129 | DBG("No URIs received from client... continuing"); | |
4130 | *sock_error = 1; | |
4131 | ret = LTTNG_ERR_SESSION_FAIL; | |
4132 | free(uris); | |
4133 | goto error; | |
4134 | } | |
4135 | ||
4136 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4137 | DBG("Creating session with ONE network URI is a bad call"); | |
4138 | ret = LTTNG_ERR_SESSION_FAIL; | |
4139 | free(uris); | |
4140 | goto error; | |
4141 | } | |
4142 | } | |
4143 | ||
4144 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
4145 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
4146 | free(uris); | |
4147 | break; | |
4148 | } | |
fb198a11 JG |
4149 | case LTTNG_SAVE_SESSION: |
4150 | { | |
4151 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
4152 | &cmd_ctx->creds); | |
4153 | break; | |
4154 | } | |
d7ba1388 MD |
4155 | case LTTNG_SET_SESSION_SHM_PATH: |
4156 | { | |
4157 | ret = cmd_set_session_shm_path(cmd_ctx->session, | |
4158 | cmd_ctx->lsm->u.set_shm_path.shm_path); | |
4159 | break; | |
4160 | } | |
93ec662e JD |
4161 | case LTTNG_METADATA_REGENERATE: |
4162 | { | |
4163 | ret = cmd_metadata_regenerate(cmd_ctx->session); | |
4164 | break; | |
4165 | } | |
5e16da05 | 4166 | default: |
f73fabfd | 4167 | ret = LTTNG_ERR_UND; |
5461b305 | 4168 | break; |
fac6795d DG |
4169 | } |
4170 | ||
5461b305 | 4171 | error: |
5461b305 DG |
4172 | if (cmd_ctx->llm == NULL) { |
4173 | DBG("Missing llm structure. Allocating one."); | |
6e10c9b9 | 4174 | if (setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0) < 0) { |
5461b305 DG |
4175 | goto setup_error; |
4176 | } | |
4177 | } | |
54d01ffb | 4178 | /* Set return code */ |
5461b305 | 4179 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 4180 | setup_error: |
b5541356 | 4181 | if (cmd_ctx->session) { |
54d01ffb | 4182 | session_unlock(cmd_ctx->session); |
b5541356 | 4183 | } |
256a5576 MD |
4184 | if (need_tracing_session) { |
4185 | session_unlock_list(); | |
4186 | } | |
54d01ffb | 4187 | init_setup_error: |
3745d315 | 4188 | assert(!rcu_read_ongoing()); |
8028d920 | 4189 | return ret; |
fac6795d DG |
4190 | } |
4191 | ||
44a5e5eb DG |
4192 | /* |
4193 | * Thread managing health check socket. | |
4194 | */ | |
4195 | static void *thread_manage_health(void *data) | |
4196 | { | |
eb4a2943 | 4197 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
4198 | uint32_t revents, nb_fd; |
4199 | struct lttng_poll_event events; | |
0c89d795 MD |
4200 | struct health_comm_msg msg; |
4201 | struct health_comm_reply reply; | |
44a5e5eb DG |
4202 | |
4203 | DBG("[thread] Manage health check started"); | |
4204 | ||
4205 | rcu_register_thread(); | |
4206 | ||
6d737ce4 DG |
4207 | /* We might hit an error path before this is created. */ |
4208 | lttng_poll_init(&events); | |
3cc04881 | 4209 | |
44a5e5eb DG |
4210 | /* Create unix socket */ |
4211 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
4212 | if (sock < 0) { | |
4213 | ERR("Unable to create health check Unix socket"); | |
4214 | ret = -1; | |
4215 | goto error; | |
4216 | } | |
4217 | ||
6c71277b MD |
4218 | if (is_root) { |
4219 | /* lttng health client socket path permissions */ | |
4220 | ret = chown(health_unix_sock_path, 0, | |
4221 | utils_get_group_id(tracing_group_name)); | |
4222 | if (ret < 0) { | |
4223 | ERR("Unable to set group on %s", health_unix_sock_path); | |
4224 | PERROR("chown"); | |
4225 | ret = -1; | |
4226 | goto error; | |
4227 | } | |
4228 | ||
4229 | ret = chmod(health_unix_sock_path, | |
4230 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4231 | if (ret < 0) { | |
4232 | ERR("Unable to set permissions on %s", health_unix_sock_path); | |
4233 | PERROR("chmod"); | |
4234 | ret = -1; | |
4235 | goto error; | |
4236 | } | |
4237 | } | |
4238 | ||
b662582b DG |
4239 | /* |
4240 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4241 | * show must go on. | |
4242 | */ | |
4243 | (void) utils_set_fd_cloexec(sock); | |
4244 | ||
44a5e5eb DG |
4245 | ret = lttcomm_listen_unix_sock(sock); |
4246 | if (ret < 0) { | |
4247 | goto error; | |
4248 | } | |
4249 | ||
4250 | /* | |
4251 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4252 | * more will be added to this poll set. | |
4253 | */ | |
d0b96690 | 4254 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
4255 | if (ret < 0) { |
4256 | goto error; | |
4257 | } | |
4258 | ||
4259 | /* Add the application registration socket */ | |
4260 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
4261 | if (ret < 0) { | |
4262 | goto error; | |
4263 | } | |
4264 | ||
ef367a93 | 4265 | sessiond_notify_ready(); |
97bc1426 | 4266 | |
44a5e5eb DG |
4267 | while (1) { |
4268 | DBG("Health check ready"); | |
4269 | ||
44a5e5eb DG |
4270 | /* Inifinite blocking call, waiting for transmission */ |
4271 | restart: | |
4272 | ret = lttng_poll_wait(&events, -1); | |
4273 | if (ret < 0) { | |
4274 | /* | |
4275 | * Restart interrupted system call. | |
4276 | */ | |
4277 | if (errno == EINTR) { | |
4278 | goto restart; | |
4279 | } | |
4280 | goto error; | |
4281 | } | |
4282 | ||
0d9c5d77 DG |
4283 | nb_fd = ret; |
4284 | ||
44a5e5eb DG |
4285 | for (i = 0; i < nb_fd; i++) { |
4286 | /* Fetch once the poll data */ | |
4287 | revents = LTTNG_POLL_GETEV(&events, i); | |
4288 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4289 | ||
fd20dac9 MD |
4290 | if (!revents) { |
4291 | /* No activity for this FD (poll implementation). */ | |
4292 | continue; | |
4293 | } | |
4294 | ||
44a5e5eb | 4295 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4296 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 4297 | if (ret) { |
139ac872 MD |
4298 | err = 0; |
4299 | goto exit; | |
44a5e5eb DG |
4300 | } |
4301 | ||
4302 | /* Event on the registration socket */ | |
4303 | if (pollfd == sock) { | |
03e43155 MD |
4304 | if (revents & LPOLLIN) { |
4305 | continue; | |
4306 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
44a5e5eb DG |
4307 | ERR("Health socket poll error"); |
4308 | goto error; | |
03e43155 MD |
4309 | } else { |
4310 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4311 | goto error; | |
44a5e5eb DG |
4312 | } |
4313 | } | |
4314 | } | |
4315 | ||
4316 | new_sock = lttcomm_accept_unix_sock(sock); | |
4317 | if (new_sock < 0) { | |
4318 | goto error; | |
4319 | } | |
4320 | ||
b662582b DG |
4321 | /* |
4322 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4323 | * show must go on. | |
4324 | */ | |
4325 | (void) utils_set_fd_cloexec(new_sock); | |
4326 | ||
44a5e5eb DG |
4327 | DBG("Receiving data from client for health..."); |
4328 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
4329 | if (ret <= 0) { | |
4330 | DBG("Nothing recv() from client... continuing"); | |
4331 | ret = close(new_sock); | |
4332 | if (ret) { | |
4333 | PERROR("close"); | |
4334 | } | |
4335 | new_sock = -1; | |
4336 | continue; | |
4337 | } | |
4338 | ||
4339 | rcu_thread_online(); | |
4340 | ||
53efb85a | 4341 | memset(&reply, 0, sizeof(reply)); |
6c71277b MD |
4342 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { |
4343 | /* | |
4344 | * health_check_state returns 0 if health is | |
4345 | * bad. | |
4346 | */ | |
4347 | if (!health_check_state(health_sessiond, i)) { | |
4348 | reply.ret_code |= 1ULL << i; | |
4349 | } | |
44a5e5eb DG |
4350 | } |
4351 | ||
6c71277b | 4352 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
4353 | |
4354 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
4355 | if (ret < 0) { | |
4356 | ERR("Failed to send health data back to client"); | |
4357 | } | |
4358 | ||
4359 | /* End of transmission */ | |
4360 | ret = close(new_sock); | |
4361 | if (ret) { | |
4362 | PERROR("close"); | |
4363 | } | |
4364 | new_sock = -1; | |
4365 | } | |
4366 | ||
139ac872 | 4367 | exit: |
44a5e5eb | 4368 | error: |
139ac872 MD |
4369 | if (err) { |
4370 | ERR("Health error occurred in %s", __func__); | |
4371 | } | |
44a5e5eb DG |
4372 | DBG("Health check thread dying"); |
4373 | unlink(health_unix_sock_path); | |
4374 | if (sock >= 0) { | |
4375 | ret = close(sock); | |
4376 | if (ret) { | |
4377 | PERROR("close"); | |
4378 | } | |
4379 | } | |
44a5e5eb DG |
4380 | |
4381 | lttng_poll_clean(&events); | |
0016e083 | 4382 | stop_threads(); |
44a5e5eb DG |
4383 | rcu_unregister_thread(); |
4384 | return NULL; | |
4385 | } | |
4386 | ||
1d4b027a | 4387 | /* |
d063d709 DG |
4388 | * This thread manage all clients request using the unix client socket for |
4389 | * communication. | |
1d4b027a DG |
4390 | */ |
4391 | static void *thread_manage_clients(void *data) | |
4392 | { | |
139ac872 | 4393 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 4394 | int sock_error; |
5eb91c98 | 4395 | uint32_t revents, nb_fd; |
273ea72c | 4396 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 4397 | struct lttng_poll_event events; |
1d4b027a DG |
4398 | |
4399 | DBG("[thread] Manage client started"); | |
4400 | ||
f6a9efaa DG |
4401 | rcu_register_thread(); |
4402 | ||
6c71277b | 4403 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 4404 | |
840cb59c | 4405 | health_code_update(); |
44a5e5eb | 4406 | |
1d4b027a DG |
4407 | ret = lttcomm_listen_unix_sock(client_sock); |
4408 | if (ret < 0) { | |
35df2755 | 4409 | goto error_listen; |
1d4b027a DG |
4410 | } |
4411 | ||
5eb91c98 DG |
4412 | /* |
4413 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4414 | * more will be added to this poll set. | |
4415 | */ | |
d0b96690 | 4416 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 4417 | if (ret < 0) { |
35df2755 | 4418 | goto error_create_poll; |
5eb91c98 | 4419 | } |
273ea72c | 4420 | |
5eb91c98 DG |
4421 | /* Add the application registration socket */ |
4422 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
4423 | if (ret < 0) { | |
4424 | goto error; | |
4425 | } | |
273ea72c | 4426 | |
ef367a93 JG |
4427 | sessiond_notify_ready(); |
4428 | ret = sem_post(&load_info->message_thread_ready); | |
4429 | if (ret) { | |
4430 | PERROR("sem_post message_thread_ready"); | |
4431 | goto error; | |
4432 | } | |
0bb7724a | 4433 | |
72453c8c MD |
4434 | /* This testpoint is after we signal readiness to the parent. */ |
4435 | if (testpoint(sessiond_thread_manage_clients)) { | |
4436 | goto error; | |
4437 | } | |
4438 | ||
e547b070 | 4439 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
4440 | goto error; |
4441 | } | |
8ac94142 | 4442 | |
840cb59c | 4443 | health_code_update(); |
44a5e5eb | 4444 | |
1d4b027a | 4445 | while (1) { |
1d4b027a | 4446 | DBG("Accepting client command ..."); |
273ea72c DG |
4447 | |
4448 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 4449 | restart: |
a78af745 | 4450 | health_poll_entry(); |
5eb91c98 | 4451 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 4452 | health_poll_exit(); |
273ea72c | 4453 | if (ret < 0) { |
88f2b785 MD |
4454 | /* |
4455 | * Restart interrupted system call. | |
4456 | */ | |
4457 | if (errno == EINTR) { | |
4458 | goto restart; | |
4459 | } | |
273ea72c DG |
4460 | goto error; |
4461 | } | |
4462 | ||
0d9c5d77 DG |
4463 | nb_fd = ret; |
4464 | ||
5eb91c98 DG |
4465 | for (i = 0; i < nb_fd; i++) { |
4466 | /* Fetch once the poll data */ | |
4467 | revents = LTTNG_POLL_GETEV(&events, i); | |
4468 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4469 | ||
840cb59c | 4470 | health_code_update(); |
44a5e5eb | 4471 | |
fd20dac9 MD |
4472 | if (!revents) { |
4473 | /* No activity for this FD (poll implementation). */ | |
4474 | continue; | |
4475 | } | |
4476 | ||
5eb91c98 | 4477 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4478 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 4479 | if (ret) { |
139ac872 MD |
4480 | err = 0; |
4481 | goto exit; | |
5eb91c98 DG |
4482 | } |
4483 | ||
4484 | /* Event on the registration socket */ | |
4485 | if (pollfd == client_sock) { | |
03e43155 MD |
4486 | if (revents & LPOLLIN) { |
4487 | continue; | |
4488 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
5eb91c98 DG |
4489 | ERR("Client socket poll error"); |
4490 | goto error; | |
03e43155 MD |
4491 | } else { |
4492 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4493 | goto error; | |
5eb91c98 DG |
4494 | } |
4495 | } | |
4496 | } | |
4497 | ||
4498 | DBG("Wait for client response"); | |
4499 | ||
840cb59c | 4500 | health_code_update(); |
44a5e5eb | 4501 | |
5eb91c98 DG |
4502 | sock = lttcomm_accept_unix_sock(client_sock); |
4503 | if (sock < 0) { | |
273ea72c | 4504 | goto error; |
273ea72c DG |
4505 | } |
4506 | ||
b662582b DG |
4507 | /* |
4508 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4509 | * show must go on. | |
4510 | */ | |
4511 | (void) utils_set_fd_cloexec(sock); | |
4512 | ||
be040666 DG |
4513 | /* Set socket option for credentials retrieval */ |
4514 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
4515 | if (ret < 0) { | |
4516 | goto error; | |
4517 | } | |
4518 | ||
5eb91c98 | 4519 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 4520 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 4521 | if (cmd_ctx == NULL) { |
76d7553f | 4522 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 4523 | goto error; |
5eb91c98 | 4524 | } |
1d4b027a | 4525 | |
5eb91c98 | 4526 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 4527 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 4528 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 4529 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
4530 | goto error; |
4531 | } | |
1d4b027a | 4532 | |
5eb91c98 DG |
4533 | cmd_ctx->llm = NULL; |
4534 | cmd_ctx->session = NULL; | |
1d4b027a | 4535 | |
840cb59c | 4536 | health_code_update(); |
44a5e5eb | 4537 | |
5eb91c98 DG |
4538 | /* |
4539 | * Data is received from the lttng client. The struct | |
4540 | * lttcomm_session_msg (lsm) contains the command and data request of | |
4541 | * the client. | |
4542 | */ | |
4543 | DBG("Receiving data from client ..."); | |
be040666 DG |
4544 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
4545 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
4546 | if (ret <= 0) { |
4547 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
4548 | ret = close(sock); |
4549 | if (ret) { | |
4550 | PERROR("close"); | |
4551 | } | |
4552 | sock = -1; | |
a2c0da86 | 4553 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4554 | continue; |
4555 | } | |
1d4b027a | 4556 | |
840cb59c | 4557 | health_code_update(); |
44a5e5eb | 4558 | |
5eb91c98 DG |
4559 | // TODO: Validate cmd_ctx including sanity check for |
4560 | // security purpose. | |
f7776ea7 | 4561 | |
f6a9efaa | 4562 | rcu_thread_online(); |
5eb91c98 DG |
4563 | /* |
4564 | * This function dispatch the work to the kernel or userspace tracer | |
4565 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
4566 | * informations for the client. The command context struct contains | |
4567 | * everything this function may needs. | |
4568 | */ | |
53a80697 | 4569 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 4570 | rcu_thread_offline(); |
5eb91c98 | 4571 | if (ret < 0) { |
36134aa1 DG |
4572 | ret = close(sock); |
4573 | if (ret) { | |
4574 | PERROR("close"); | |
53a80697 | 4575 | } |
36134aa1 | 4576 | sock = -1; |
bbd973c2 | 4577 | /* |
5eb91c98 | 4578 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 4579 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
4580 | * (ENOMEM). Error detected but still accept |
4581 | * command, unless a socket error has been | |
4582 | * detected. | |
bbd973c2 | 4583 | */ |
bbd973c2 | 4584 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4585 | continue; |
4586 | } | |
d6e4fca4 | 4587 | |
840cb59c | 4588 | health_code_update(); |
44a5e5eb | 4589 | |
a1ac8b97 | 4590 | DBG("Sending response (size: %d, retcode: %s (%d))", |
54d01ffb | 4591 | cmd_ctx->lttng_msg_size, |
a1ac8b97 JG |
4592 | lttng_strerror(-cmd_ctx->llm->ret_code), |
4593 | cmd_ctx->llm->ret_code); | |
54d01ffb | 4594 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
4595 | if (ret < 0) { |
4596 | ERR("Failed to send data back to client"); | |
bbd973c2 | 4597 | } |
1d4b027a | 4598 | |
5eb91c98 | 4599 | /* End of transmission */ |
76d7553f MD |
4600 | ret = close(sock); |
4601 | if (ret) { | |
4602 | PERROR("close"); | |
4603 | } | |
4604 | sock = -1; | |
be040666 DG |
4605 | |
4606 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 4607 | |
840cb59c | 4608 | health_code_update(); |
273ea72c DG |
4609 | } |
4610 | ||
139ac872 | 4611 | exit: |
5eb91c98 | 4612 | error: |
35df2755 CB |
4613 | if (sock >= 0) { |
4614 | ret = close(sock); | |
4615 | if (ret) { | |
4616 | PERROR("close"); | |
4617 | } | |
139ac872 | 4618 | } |
44a5e5eb | 4619 | |
35df2755 CB |
4620 | lttng_poll_clean(&events); |
4621 | clean_command_ctx(&cmd_ctx); | |
4622 | ||
4623 | error_listen: | |
4624 | error_create_poll: | |
273ea72c | 4625 | unlink(client_unix_sock_path); |
76d7553f MD |
4626 | if (client_sock >= 0) { |
4627 | ret = close(client_sock); | |
4628 | if (ret) { | |
4629 | PERROR("close"); | |
4630 | } | |
a4b35e07 | 4631 | } |
35df2755 CB |
4632 | |
4633 | if (err) { | |
840cb59c | 4634 | health_error(); |
35df2755 | 4635 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4636 | } |
273ea72c | 4637 | |
8782cc74 | 4638 | health_unregister(health_sessiond); |
35df2755 CB |
4639 | |
4640 | DBG("Client thread dying"); | |
f6a9efaa DG |
4641 | |
4642 | rcu_unregister_thread(); | |
4a15001e MD |
4643 | |
4644 | /* | |
4645 | * Since we are creating the consumer threads, we own them, so we need | |
4646 | * to join them before our thread exits. | |
4647 | */ | |
4648 | ret = join_consumer_thread(&kconsumer_data); | |
4649 | if (ret) { | |
4650 | errno = ret; | |
4651 | PERROR("join_consumer"); | |
4652 | } | |
4653 | ||
4654 | ret = join_consumer_thread(&ustconsumer32_data); | |
4655 | if (ret) { | |
4656 | errno = ret; | |
4657 | PERROR("join_consumer ust32"); | |
4658 | } | |
4659 | ||
4660 | ret = join_consumer_thread(&ustconsumer64_data); | |
4661 | if (ret) { | |
4662 | errno = ret; | |
4663 | PERROR("join_consumer ust64"); | |
4664 | } | |
1d4b027a DG |
4665 | return NULL; |
4666 | } | |
4667 | ||
c0232ea5 JG |
4668 | static int string_match(const char *str1, const char *str2) |
4669 | { | |
4670 | return (str1 && str2) && !strcmp(str1, str2); | |
4671 | } | |
4672 | ||
fac6795d | 4673 | /* |
26296c48 JG |
4674 | * Take an option from the getopt output and set it in the right variable to be |
4675 | * used later. | |
4676 | * | |
4677 | * Return 0 on success else a negative value. | |
fac6795d | 4678 | */ |
26296c48 | 4679 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4680 | { |
26296c48 | 4681 | int ret = 0; |
fac6795d | 4682 | |
c0232ea5 | 4683 | if (string_match(optname, "client-sock") || opt == 'c') { |
313f2aa8 JG |
4684 | if (!arg || *arg == '\0') { |
4685 | ret = -EINVAL; | |
4686 | goto end; | |
4687 | } | |
e8fa9fb0 MD |
4688 | if (lttng_is_setuid_setgid()) { |
4689 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4690 | "-c, --client-sock"); | |
4691 | } else { | |
4692 | snprintf(client_unix_sock_path, PATH_MAX, "%s", arg); | |
4693 | } | |
c0232ea5 | 4694 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
313f2aa8 JG |
4695 | if (!arg || *arg == '\0') { |
4696 | ret = -EINVAL; | |
4697 | goto end; | |
4698 | } | |
e8fa9fb0 MD |
4699 | if (lttng_is_setuid_setgid()) { |
4700 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4701 | "-a, --apps-sock"); | |
4702 | } else { | |
4703 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", arg); | |
4704 | } | |
c0232ea5 | 4705 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
26296c48 | 4706 | opt_daemon = 1; |
c0232ea5 | 4707 | } else if (string_match(optname, "background") || opt == 'b') { |
72dd7491 | 4708 | opt_background = 1; |
c0232ea5 | 4709 | } else if (string_match(optname, "group") || opt == 'g') { |
313f2aa8 JG |
4710 | if (!arg || *arg == '\0') { |
4711 | ret = -EINVAL; | |
4712 | goto end; | |
4713 | } | |
e8fa9fb0 MD |
4714 | if (lttng_is_setuid_setgid()) { |
4715 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4716 | "-g, --group"); | |
4717 | } else { | |
4718 | /* | |
4719 | * If the override option is set, the pointer points to a | |
4720 | * *non* const thus freeing it even though the variable type is | |
4721 | * set to const. | |
4722 | */ | |
4723 | if (tracing_group_name_override) { | |
4724 | free((void *) tracing_group_name); | |
4725 | } | |
4726 | tracing_group_name = strdup(arg); | |
4727 | if (!tracing_group_name) { | |
4728 | PERROR("strdup"); | |
4729 | ret = -ENOMEM; | |
4730 | } | |
4731 | tracing_group_name_override = 1; | |
db322c4d | 4732 | } |
c0232ea5 | 4733 | } else if (string_match(optname, "help") || opt == 'h') { |
8190767e PP |
4734 | ret = utils_show_man_page(8, "lttng-sessiond"); |
4735 | if (ret) { | |
4736 | ERR("Cannot view man page lttng-sessiond(8)"); | |
4737 | perror("exec"); | |
4738 | } | |
4739 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 4740 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
4741 | fprintf(stdout, "%s\n", VERSION); |
4742 | exit(EXIT_SUCCESS); | |
c0232ea5 | 4743 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
26296c48 | 4744 | opt_sig_parent = 1; |
c0232ea5 | 4745 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
313f2aa8 JG |
4746 | if (!arg || *arg == '\0') { |
4747 | ret = -EINVAL; | |
4748 | goto end; | |
4749 | } | |
e8fa9fb0 MD |
4750 | if (lttng_is_setuid_setgid()) { |
4751 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4752 | "--kconsumerd-err-sock"); | |
4753 | } else { | |
4754 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4755 | } | |
c0232ea5 | 4756 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
313f2aa8 JG |
4757 | if (!arg || *arg == '\0') { |
4758 | ret = -EINVAL; | |
4759 | goto end; | |
4760 | } | |
e8fa9fb0 MD |
4761 | if (lttng_is_setuid_setgid()) { |
4762 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4763 | "--kconsumerd-cmd-sock"); | |
4764 | } else { | |
4765 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4766 | } | |
c0232ea5 | 4767 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
313f2aa8 JG |
4768 | if (!arg || *arg == '\0') { |
4769 | ret = -EINVAL; | |
4770 | goto end; | |
4771 | } | |
e8fa9fb0 MD |
4772 | if (lttng_is_setuid_setgid()) { |
4773 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4774 | "--ustconsumerd64-err-sock"); | |
4775 | } else { | |
4776 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4777 | } | |
c0232ea5 | 4778 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
313f2aa8 JG |
4779 | if (!arg || *arg == '\0') { |
4780 | ret = -EINVAL; | |
4781 | goto end; | |
4782 | } | |
e8fa9fb0 MD |
4783 | if (lttng_is_setuid_setgid()) { |
4784 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4785 | "--ustconsumerd64-cmd-sock"); | |
4786 | } else { | |
4787 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4788 | } | |
c0232ea5 | 4789 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
313f2aa8 JG |
4790 | if (!arg || *arg == '\0') { |
4791 | ret = -EINVAL; | |
4792 | goto end; | |
4793 | } | |
e8fa9fb0 MD |
4794 | if (lttng_is_setuid_setgid()) { |
4795 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4796 | "--ustconsumerd32-err-sock"); | |
4797 | } else { | |
4798 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4799 | } | |
c0232ea5 | 4800 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
313f2aa8 JG |
4801 | if (!arg || *arg == '\0') { |
4802 | ret = -EINVAL; | |
4803 | goto end; | |
4804 | } | |
e8fa9fb0 MD |
4805 | if (lttng_is_setuid_setgid()) { |
4806 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4807 | "--ustconsumerd32-cmd-sock"); | |
4808 | } else { | |
4809 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4810 | } | |
c0232ea5 | 4811 | } else if (string_match(optname, "no-kernel")) { |
26296c48 | 4812 | opt_no_kernel = 1; |
c0232ea5 | 4813 | } else if (string_match(optname, "quiet") || opt == 'q') { |
26296c48 | 4814 | lttng_opt_quiet = 1; |
c0232ea5 | 4815 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
4816 | /* Verbose level can increase using multiple -v */ |
4817 | if (arg) { | |
13755a18 | 4818 | /* Value obtained from config file */ |
26296c48 JG |
4819 | lttng_opt_verbose = config_parse_value(arg); |
4820 | } else { | |
13755a18 JG |
4821 | /* -v used on command line */ |
4822 | lttng_opt_verbose++; | |
26296c48 | 4823 | } |
13755a18 JG |
4824 | /* Clamp value to [0, 3] */ |
4825 | lttng_opt_verbose = lttng_opt_verbose < 0 ? 0 : | |
4826 | (lttng_opt_verbose <= 3 ? lttng_opt_verbose : 3); | |
c0232ea5 | 4827 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 JG |
4828 | if (arg) { |
4829 | opt_verbose_consumer = config_parse_value(arg); | |
4830 | } else { | |
9c62ab28 | 4831 | opt_verbose_consumer++; |
26296c48 | 4832 | } |
c0232ea5 | 4833 | } else if (string_match(optname, "consumerd32-path")) { |
313f2aa8 JG |
4834 | if (!arg || *arg == '\0') { |
4835 | ret = -EINVAL; | |
4836 | goto end; | |
4837 | } | |
e8fa9fb0 MD |
4838 | if (lttng_is_setuid_setgid()) { |
4839 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4840 | "--consumerd32-path"); | |
4841 | } else { | |
4842 | if (consumerd32_bin_override) { | |
4843 | free((void *) consumerd32_bin); | |
4844 | } | |
4845 | consumerd32_bin = strdup(arg); | |
4846 | if (!consumerd32_bin) { | |
4847 | PERROR("strdup"); | |
4848 | ret = -ENOMEM; | |
4849 | } | |
4850 | consumerd32_bin_override = 1; | |
db322c4d | 4851 | } |
c0232ea5 | 4852 | } else if (string_match(optname, "consumerd32-libdir")) { |
313f2aa8 JG |
4853 | if (!arg || *arg == '\0') { |
4854 | ret = -EINVAL; | |
4855 | goto end; | |
4856 | } | |
e8fa9fb0 MD |
4857 | if (lttng_is_setuid_setgid()) { |
4858 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4859 | "--consumerd32-libdir"); | |
4860 | } else { | |
4861 | if (consumerd32_libdir_override) { | |
4862 | free((void *) consumerd32_libdir); | |
4863 | } | |
4864 | consumerd32_libdir = strdup(arg); | |
4865 | if (!consumerd32_libdir) { | |
4866 | PERROR("strdup"); | |
4867 | ret = -ENOMEM; | |
4868 | } | |
4869 | consumerd32_libdir_override = 1; | |
db322c4d | 4870 | } |
c0232ea5 | 4871 | } else if (string_match(optname, "consumerd64-path")) { |
313f2aa8 JG |
4872 | if (!arg || *arg == '\0') { |
4873 | ret = -EINVAL; | |
4874 | goto end; | |
4875 | } | |
e8fa9fb0 MD |
4876 | if (lttng_is_setuid_setgid()) { |
4877 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4878 | "--consumerd64-path"); | |
4879 | } else { | |
4880 | if (consumerd64_bin_override) { | |
4881 | free((void *) consumerd64_bin); | |
4882 | } | |
4883 | consumerd64_bin = strdup(arg); | |
4884 | if (!consumerd64_bin) { | |
4885 | PERROR("strdup"); | |
4886 | ret = -ENOMEM; | |
4887 | } | |
4888 | consumerd64_bin_override = 1; | |
db322c4d | 4889 | } |
c0232ea5 | 4890 | } else if (string_match(optname, "consumerd64-libdir")) { |
313f2aa8 JG |
4891 | if (!arg || *arg == '\0') { |
4892 | ret = -EINVAL; | |
4893 | goto end; | |
4894 | } | |
e8fa9fb0 MD |
4895 | if (lttng_is_setuid_setgid()) { |
4896 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4897 | "--consumerd64-libdir"); | |
4898 | } else { | |
4899 | if (consumerd64_libdir_override) { | |
4900 | free((void *) consumerd64_libdir); | |
4901 | } | |
4902 | consumerd64_libdir = strdup(arg); | |
4903 | if (!consumerd64_libdir) { | |
4904 | PERROR("strdup"); | |
4905 | ret = -ENOMEM; | |
4906 | } | |
4907 | consumerd64_libdir_override = 1; | |
db322c4d | 4908 | } |
c0232ea5 | 4909 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
313f2aa8 JG |
4910 | if (!arg || *arg == '\0') { |
4911 | ret = -EINVAL; | |
4912 | goto end; | |
4913 | } | |
e8fa9fb0 MD |
4914 | if (lttng_is_setuid_setgid()) { |
4915 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4916 | "-p, --pidfile"); | |
4917 | } else { | |
4918 | free(opt_pidfile); | |
4919 | opt_pidfile = strdup(arg); | |
4920 | if (!opt_pidfile) { | |
4921 | PERROR("strdup"); | |
4922 | ret = -ENOMEM; | |
4923 | } | |
db322c4d | 4924 | } |
c0232ea5 | 4925 | } else if (string_match(optname, "agent-tcp-port")) { |
313f2aa8 JG |
4926 | if (!arg || *arg == '\0') { |
4927 | ret = -EINVAL; | |
4928 | goto end; | |
4929 | } | |
e8fa9fb0 MD |
4930 | if (lttng_is_setuid_setgid()) { |
4931 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4932 | "--agent-tcp-port"); | |
4933 | } else { | |
4934 | unsigned long v; | |
4d076222 | 4935 | |
e04aa23e JG |
4936 | if (!arg) { |
4937 | ret = -EINVAL; | |
4938 | goto end; | |
4939 | } | |
e8fa9fb0 MD |
4940 | errno = 0; |
4941 | v = strtoul(arg, NULL, 0); | |
4942 | if (errno != 0 || !isdigit(arg[0])) { | |
4943 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
4944 | return -1; | |
4945 | } | |
4946 | if (v == 0 || v >= 65535) { | |
4947 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
4948 | return -1; | |
4949 | } | |
4950 | agent_tcp_port = (uint32_t) v; | |
4951 | DBG3("Agent TCP port set to non default: %u", agent_tcp_port); | |
26296c48 | 4952 | } |
c0232ea5 | 4953 | } else if (string_match(optname, "load") || opt == 'l') { |
313f2aa8 JG |
4954 | if (!arg || *arg == '\0') { |
4955 | ret = -EINVAL; | |
4956 | goto end; | |
4957 | } | |
e8fa9fb0 MD |
4958 | if (lttng_is_setuid_setgid()) { |
4959 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4960 | "-l, --load"); | |
4961 | } else { | |
4962 | free(opt_load_session_path); | |
4963 | opt_load_session_path = strdup(arg); | |
4964 | if (!opt_load_session_path) { | |
4965 | PERROR("strdup"); | |
4966 | ret = -ENOMEM; | |
4967 | } | |
ef367a93 | 4968 | } |
c0232ea5 | 4969 | } else if (string_match(optname, "kmod-probes")) { |
313f2aa8 JG |
4970 | if (!arg || *arg == '\0') { |
4971 | ret = -EINVAL; | |
4972 | goto end; | |
4973 | } | |
e8fa9fb0 MD |
4974 | if (lttng_is_setuid_setgid()) { |
4975 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4976 | "--kmod-probes"); | |
4977 | } else { | |
4978 | free(kmod_probes_list); | |
4979 | kmod_probes_list = strdup(arg); | |
4980 | if (!kmod_probes_list) { | |
4981 | PERROR("strdup"); | |
4982 | ret = -ENOMEM; | |
4983 | } | |
c9d42407 | 4984 | } |
c0232ea5 | 4985 | } else if (string_match(optname, "extra-kmod-probes")) { |
313f2aa8 JG |
4986 | if (!arg || *arg == '\0') { |
4987 | ret = -EINVAL; | |
4988 | goto end; | |
4989 | } | |
e8fa9fb0 MD |
4990 | if (lttng_is_setuid_setgid()) { |
4991 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4992 | "--extra-kmod-probes"); | |
4993 | } else { | |
4994 | free(kmod_extra_probes_list); | |
4995 | kmod_extra_probes_list = strdup(arg); | |
4996 | if (!kmod_extra_probes_list) { | |
4997 | PERROR("strdup"); | |
4998 | ret = -ENOMEM; | |
4999 | } | |
db322c4d | 5000 | } |
c0232ea5 JG |
5001 | } else if (string_match(optname, "config") || opt == 'f') { |
5002 | /* This is handled in set_options() thus silent skip. */ | |
5003 | goto end; | |
5004 | } else { | |
26296c48 JG |
5005 | /* Unknown option or other error. |
5006 | * Error is printed by getopt, just return */ | |
5007 | ret = -1; | |
5008 | } | |
5009 | ||
f3dd7ce7 | 5010 | end: |
c5d350b2 JG |
5011 | if (ret == -EINVAL) { |
5012 | const char *opt_name = "unknown"; | |
5013 | int i; | |
5014 | ||
5015 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
5016 | i++) { | |
5017 | if (opt == long_options[i].val) { | |
5018 | opt_name = long_options[i].name; | |
5019 | break; | |
5020 | } | |
5021 | } | |
5022 | ||
5023 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
5024 | opt_name); | |
5025 | } | |
f3dd7ce7 | 5026 | |
26296c48 JG |
5027 | return ret; |
5028 | } | |
5029 | ||
5030 | /* | |
5031 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 5032 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
5033 | * return value conventions. |
5034 | */ | |
5035 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
5036 | { | |
5037 | int ret = 0, i; | |
5038 | ||
5039 | if (!entry || !entry->name || !entry->value) { | |
5040 | ret = -EINVAL; | |
5041 | goto end; | |
5042 | } | |
5043 | ||
5044 | /* Check if the option is to be ignored */ | |
5045 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
5046 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
5047 | goto end; | |
5048 | } | |
5049 | } | |
5050 | ||
5051 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
5052 | i++) { | |
5053 | ||
5054 | /* Ignore if not fully matched. */ | |
5055 | if (strcmp(entry->name, long_options[i].name)) { | |
5056 | continue; | |
5057 | } | |
5058 | ||
5059 | /* | |
5060 | * If the option takes no argument on the command line, we have to | |
5061 | * check if the value is "true". We support non-zero numeric values, | |
5062 | * true, on and yes. | |
5063 | */ | |
5064 | if (!long_options[i].has_arg) { | |
5065 | ret = config_parse_value(entry->value); | |
5066 | if (ret <= 0) { | |
5067 | if (ret) { | |
5068 | WARN("Invalid configuration value \"%s\" for option %s", | |
5069 | entry->value, entry->name); | |
5070 | } | |
5071 | /* False, skip boolean config option. */ | |
5072 | goto end; | |
4d076222 | 5073 | } |
26296c48 JG |
5074 | } |
5075 | ||
5076 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
5077 | goto end; | |
5078 | } | |
5079 | ||
5080 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
5081 | ||
5082 | end: | |
5083 | return ret; | |
5084 | } | |
5085 | ||
5086 | /* | |
5087 | * daemon configuration loading and argument parsing | |
5088 | */ | |
5089 | static int set_options(int argc, char **argv) | |
5090 | { | |
5091 | int ret = 0, c = 0, option_index = 0; | |
5092 | int orig_optopt = optopt, orig_optind = optind; | |
5093 | char *optstring; | |
5094 | const char *config_path = NULL; | |
5095 | ||
5096 | optstring = utils_generate_optstring(long_options, | |
5097 | sizeof(long_options) / sizeof(struct option)); | |
5098 | if (!optstring) { | |
5099 | ret = -ENOMEM; | |
5100 | goto end; | |
5101 | } | |
5102 | ||
5103 | /* Check for the --config option */ | |
5104 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
5105 | &option_index)) != -1) { | |
5106 | if (c == '?') { | |
5107 | ret = -EINVAL; | |
5108 | goto end; | |
5109 | } else if (c != 'f') { | |
5110 | /* if not equal to --config option. */ | |
5111 | continue; | |
5112 | } | |
5113 | ||
e8fa9fb0 MD |
5114 | if (lttng_is_setuid_setgid()) { |
5115 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5116 | "-f, --config"); | |
5117 | } else { | |
5118 | config_path = utils_expand_path(optarg); | |
5119 | if (!config_path) { | |
5120 | ERR("Failed to resolve path: %s", optarg); | |
5121 | } | |
26296c48 JG |
5122 | } |
5123 | } | |
5124 | ||
5125 | ret = config_get_section_entries(config_path, config_section_name, | |
5126 | config_entry_handler, NULL); | |
5127 | if (ret) { | |
5128 | if (ret > 0) { | |
5129 | ERR("Invalid configuration option at line %i", ret); | |
5130 | ret = -1; | |
5131 | } | |
5132 | goto end; | |
5133 | } | |
5134 | ||
5135 | /* Reset getopt's global state */ | |
5136 | optopt = orig_optopt; | |
5137 | optind = orig_optind; | |
5138 | while (1) { | |
c0232ea5 JG |
5139 | option_index = -1; |
5140 | /* | |
5141 | * getopt_long() will not set option_index if it encounters a | |
5142 | * short option. | |
5143 | */ | |
5144 | c = getopt_long(argc, argv, optstring, long_options, | |
5145 | &option_index); | |
26296c48 | 5146 | if (c == -1) { |
4d076222 DG |
5147 | break; |
5148 | } | |
26296c48 | 5149 | |
c0232ea5 JG |
5150 | /* |
5151 | * Pass NULL as the long option name if popt left the index | |
5152 | * unset. | |
5153 | */ | |
5154 | ret = set_option(c, optarg, | |
5155 | option_index < 0 ? NULL : | |
5156 | long_options[option_index].name); | |
26296c48 JG |
5157 | if (ret < 0) { |
5158 | break; | |
fac6795d DG |
5159 | } |
5160 | } | |
5161 | ||
26296c48 JG |
5162 | end: |
5163 | free(optstring); | |
5164 | return ret; | |
fac6795d DG |
5165 | } |
5166 | ||
5167 | /* | |
d063d709 | 5168 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
5169 | * apps_sock - The communication socket for all UST apps. |
5170 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 5171 | */ |
cf3af59e | 5172 | static int init_daemon_socket(void) |
fac6795d DG |
5173 | { |
5174 | int ret = 0; | |
5175 | mode_t old_umask; | |
5176 | ||
5177 | old_umask = umask(0); | |
5178 | ||
5179 | /* Create client tool unix socket */ | |
d6f42150 DG |
5180 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
5181 | if (client_sock < 0) { | |
5182 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
5183 | ret = -1; |
5184 | goto end; | |
5185 | } | |
5186 | ||
b662582b DG |
5187 | /* Set the cloexec flag */ |
5188 | ret = utils_set_fd_cloexec(client_sock); | |
5189 | if (ret < 0) { | |
5190 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
5191 | "Continuing but note that the consumer daemon will have a " | |
5192 | "reference to this socket on exec()", client_sock); | |
5193 | } | |
5194 | ||
fac6795d DG |
5195 | /* File permission MUST be 660 */ |
5196 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
5197 | if (ret < 0) { | |
d6f42150 | 5198 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 5199 | PERROR("chmod"); |
fac6795d DG |
5200 | goto end; |
5201 | } | |
5202 | ||
5203 | /* Create the application unix socket */ | |
d6f42150 DG |
5204 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
5205 | if (apps_sock < 0) { | |
5206 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
5207 | ret = -1; |
5208 | goto end; | |
5209 | } | |
5210 | ||
b662582b DG |
5211 | /* Set the cloexec flag */ |
5212 | ret = utils_set_fd_cloexec(apps_sock); | |
5213 | if (ret < 0) { | |
5214 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
5215 | "Continuing but note that the consumer daemon will have a " | |
5216 | "reference to this socket on exec()", apps_sock); | |
5217 | } | |
5218 | ||
d6f42150 | 5219 | /* File permission MUST be 666 */ |
54d01ffb DG |
5220 | ret = chmod(apps_unix_sock_path, |
5221 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 5222 | if (ret < 0) { |
d6f42150 | 5223 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 5224 | PERROR("chmod"); |
fac6795d DG |
5225 | goto end; |
5226 | } | |
5227 | ||
b662582b DG |
5228 | DBG3("Session daemon client socket %d and application socket %d created", |
5229 | client_sock, apps_sock); | |
5230 | ||
fac6795d DG |
5231 | end: |
5232 | umask(old_umask); | |
5233 | return ret; | |
5234 | } | |
5235 | ||
5236 | /* | |
54d01ffb DG |
5237 | * Check if the global socket is available, and if a daemon is answering at the |
5238 | * other side. If yes, error is returned. | |
fac6795d | 5239 | */ |
cf3af59e | 5240 | static int check_existing_daemon(void) |
fac6795d | 5241 | { |
7d8234d9 | 5242 | /* Is there anybody out there ? */ |
099e26bd | 5243 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 5244 | return -EEXIST; |
099e26bd | 5245 | } |
b09c7c76 DG |
5246 | |
5247 | return 0; | |
fac6795d DG |
5248 | } |
5249 | ||
fac6795d | 5250 | /* |
d063d709 | 5251 | * Set the tracing group gid onto the client socket. |
5e16da05 | 5252 | * |
d063d709 | 5253 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 5254 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 5255 | */ |
be040666 | 5256 | static int set_permissions(char *rundir) |
fac6795d DG |
5257 | { |
5258 | int ret; | |
996b65c8 | 5259 | gid_t gid; |
fac6795d | 5260 | |
6c71277b | 5261 | gid = utils_get_group_id(tracing_group_name); |
fac6795d | 5262 | |
d6f42150 | 5263 | /* Set lttng run dir */ |
be040666 | 5264 | ret = chown(rundir, 0, gid); |
d6f42150 | 5265 | if (ret < 0) { |
be040666 | 5266 | ERR("Unable to set group on %s", rundir); |
76d7553f | 5267 | PERROR("chown"); |
d6f42150 DG |
5268 | } |
5269 | ||
6c71277b MD |
5270 | /* |
5271 | * Ensure all applications and tracing group can search the run | |
5272 | * dir. Allow everyone to read the directory, since it does not | |
5273 | * buy us anything to hide its content. | |
5274 | */ | |
5275 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
5276 | if (ret < 0) { |
5277 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 5278 | PERROR("chmod"); |
d1613cf5 JN |
5279 | } |
5280 | ||
d6f42150 | 5281 | /* lttng client socket path */ |
996b65c8 | 5282 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 5283 | if (ret < 0) { |
d6f42150 | 5284 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 5285 | PERROR("chown"); |
d6f42150 DG |
5286 | } |
5287 | ||
3bd1e081 | 5288 | /* kconsumer error socket path */ |
6c71277b | 5289 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 5290 | if (ret < 0) { |
3bd1e081 | 5291 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 5292 | PERROR("chown"); |
3bd1e081 MD |
5293 | } |
5294 | ||
7753dea8 | 5295 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 5296 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
5297 | if (ret < 0) { |
5298 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 5299 | PERROR("chown"); |
7753dea8 MD |
5300 | } |
5301 | ||
5302 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 5303 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 5304 | if (ret < 0) { |
7753dea8 | 5305 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 5306 | PERROR("chown"); |
fac6795d DG |
5307 | } |
5308 | ||
d6f42150 | 5309 | DBG("All permissions are set"); |
e07ae692 | 5310 | |
fac6795d DG |
5311 | return ret; |
5312 | } | |
5313 | ||
d6f42150 | 5314 | /* |
d063d709 | 5315 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 5316 | */ |
67e40797 | 5317 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
5318 | { |
5319 | int ret; | |
5320 | ||
67e40797 DG |
5321 | DBG3("Creating LTTng run directory: %s", rundir); |
5322 | ||
d1613cf5 | 5323 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 5324 | if (ret < 0) { |
b1f11e69 | 5325 | if (errno != EEXIST) { |
67e40797 | 5326 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
5327 | goto error; |
5328 | } else { | |
5329 | ret = 0; | |
5330 | } | |
d6f42150 DG |
5331 | } |
5332 | ||
5333 | error: | |
5334 | return ret; | |
5335 | } | |
5336 | ||
5337 | /* | |
d063d709 DG |
5338 | * Setup sockets and directory needed by the kconsumerd communication with the |
5339 | * session daemon. | |
d6f42150 | 5340 | */ |
67e40797 DG |
5341 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
5342 | const char *rundir) | |
d6f42150 DG |
5343 | { |
5344 | int ret; | |
67e40797 | 5345 | char path[PATH_MAX]; |
d6f42150 | 5346 | |
6c71277b | 5347 | switch (consumer_data->type) { |
7753dea8 | 5348 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 5349 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
5350 | break; |
5351 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 5352 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
5353 | break; |
5354 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 5355 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
5356 | break; |
5357 | default: | |
5358 | ERR("Consumer type unknown"); | |
5359 | ret = -EINVAL; | |
5360 | goto error; | |
d6f42150 DG |
5361 | } |
5362 | ||
67e40797 DG |
5363 | DBG2("Creating consumer directory: %s", path); |
5364 | ||
6c71277b | 5365 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
d6f42150 | 5366 | if (ret < 0) { |
6beb2242 | 5367 | if (errno != EEXIST) { |
f11e84c2 | 5368 | PERROR("mkdir"); |
3bd1e081 | 5369 | ERR("Failed to create %s", path); |
6beb2242 DG |
5370 | goto error; |
5371 | } | |
f11e84c2 | 5372 | ret = -1; |
d6f42150 | 5373 | } |
6c71277b MD |
5374 | if (is_root) { |
5375 | ret = chown(path, 0, utils_get_group_id(tracing_group_name)); | |
5376 | if (ret < 0) { | |
5377 | ERR("Unable to set group on %s", path); | |
5378 | PERROR("chown"); | |
5379 | goto error; | |
5380 | } | |
5381 | } | |
d6f42150 DG |
5382 | |
5383 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
5384 | consumer_data->err_sock = |
5385 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
5386 | if (consumer_data->err_sock < 0) { | |
5387 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
5388 | ret = -1; |
5389 | goto error; | |
5390 | } | |
5391 | ||
a24f05ab MD |
5392 | /* |
5393 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
5394 | * show must go on. | |
5395 | */ | |
5396 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
5397 | if (ret < 0) { | |
5398 | PERROR("utils_set_fd_cloexec"); | |
5399 | /* continue anyway */ | |
5400 | } | |
5401 | ||
d6f42150 | 5402 | /* File permission MUST be 660 */ |
3bd1e081 | 5403 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 5404 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 5405 | if (ret < 0) { |
3bd1e081 | 5406 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 5407 | PERROR("chmod"); |
d6f42150 DG |
5408 | goto error; |
5409 | } | |
5410 | ||
5411 | error: | |
5412 | return ret; | |
5413 | } | |
5414 | ||
fac6795d | 5415 | /* |
d063d709 | 5416 | * Signal handler for the daemon |
cf3af59e | 5417 | * |
54d01ffb DG |
5418 | * Simply stop all worker threads, leaving main() return gracefully after |
5419 | * joining all threads and calling cleanup(). | |
fac6795d DG |
5420 | */ |
5421 | static void sighandler(int sig) | |
5422 | { | |
5423 | switch (sig) { | |
cf3af59e | 5424 | case SIGINT: |
af87c45a | 5425 | DBG("SIGINT caught"); |
cf3af59e MD |
5426 | stop_threads(); |
5427 | break; | |
5428 | case SIGTERM: | |
af87c45a | 5429 | DBG("SIGTERM caught"); |
cf3af59e MD |
5430 | stop_threads(); |
5431 | break; | |
0bb7724a DG |
5432 | case SIGUSR1: |
5433 | CMM_STORE_SHARED(recv_child_signal, 1); | |
5434 | break; | |
cf3af59e MD |
5435 | default: |
5436 | break; | |
fac6795d | 5437 | } |
fac6795d DG |
5438 | } |
5439 | ||
5440 | /* | |
d063d709 | 5441 | * Setup signal handler for : |
1d4b027a | 5442 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 5443 | */ |
1d4b027a | 5444 | static int set_signal_handler(void) |
fac6795d | 5445 | { |
1d4b027a DG |
5446 | int ret = 0; |
5447 | struct sigaction sa; | |
5448 | sigset_t sigset; | |
fac6795d | 5449 | |
1d4b027a | 5450 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 5451 | PERROR("sigemptyset"); |
1d4b027a DG |
5452 | return ret; |
5453 | } | |
d6f42150 | 5454 | |
1d4b027a DG |
5455 | sa.sa_mask = sigset; |
5456 | sa.sa_flags = 0; | |
e0b31a80 MD |
5457 | |
5458 | sa.sa_handler = sighandler; | |
1d4b027a | 5459 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 5460 | PERROR("sigaction"); |
1d4b027a | 5461 | return ret; |
d6f42150 DG |
5462 | } |
5463 | ||
1d4b027a | 5464 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 5465 | PERROR("sigaction"); |
1d4b027a | 5466 | return ret; |
d6f42150 | 5467 | } |
aaf26714 | 5468 | |
e0b31a80 | 5469 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 5470 | PERROR("sigaction"); |
1d4b027a | 5471 | return ret; |
8c0faa1d DG |
5472 | } |
5473 | ||
e0b31a80 MD |
5474 | sa.sa_handler = SIG_IGN; |
5475 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
5476 | PERROR("sigaction"); |
5477 | return ret; | |
5478 | } | |
5479 | ||
5480 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
5481 | |
5482 | return ret; | |
fac6795d DG |
5483 | } |
5484 | ||
f3ed775e | 5485 | /* |
d063d709 DG |
5486 | * Set open files limit to unlimited. This daemon can open a large number of |
5487 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
5488 | */ |
5489 | static void set_ulimit(void) | |
5490 | { | |
5491 | int ret; | |
5492 | struct rlimit lim; | |
5493 | ||
a88df331 | 5494 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
5495 | lim.rlim_cur = 65535; |
5496 | lim.rlim_max = 65535; | |
5497 | ||
5498 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
5499 | if (ret < 0) { | |
76d7553f | 5500 | PERROR("failed to set open files limit"); |
f3ed775e DG |
5501 | } |
5502 | } | |
5503 | ||
35f90c40 DG |
5504 | /* |
5505 | * Write pidfile using the rundir and opt_pidfile. | |
5506 | */ | |
4a15001e | 5507 | static int write_pidfile(void) |
35f90c40 DG |
5508 | { |
5509 | int ret; | |
5510 | char pidfile_path[PATH_MAX]; | |
5511 | ||
5512 | assert(rundir); | |
5513 | ||
5514 | if (opt_pidfile) { | |
221cbdf3 MD |
5515 | if (lttng_strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path))) { |
5516 | ret = -1; | |
5517 | goto error; | |
5518 | } | |
35f90c40 DG |
5519 | } else { |
5520 | /* Build pidfile path from rundir and opt_pidfile. */ | |
5521 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
5522 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
5523 | if (ret < 0) { | |
5524 | PERROR("snprintf pidfile path"); | |
5525 | goto error; | |
5526 | } | |
5527 | } | |
5528 | ||
5529 | /* | |
4a15001e | 5530 | * Create pid file in rundir. |
35f90c40 | 5531 | */ |
4a15001e | 5532 | ret = utils_create_pid_file(getpid(), pidfile_path); |
35f90c40 | 5533 | error: |
4a15001e | 5534 | return ret; |
35f90c40 DG |
5535 | } |
5536 | ||
c9cb3e7d JG |
5537 | /* |
5538 | * Create lockfile using the rundir and return its fd. | |
5539 | */ | |
5540 | static int create_lockfile(void) | |
5541 | { | |
5542 | int ret; | |
5543 | char lockfile_path[PATH_MAX]; | |
5544 | ||
5545 | ret = generate_lock_file_path(lockfile_path, sizeof(lockfile_path)); | |
5546 | if (ret < 0) { | |
5547 | goto error; | |
5548 | } | |
5549 | ||
5550 | ret = utils_create_lock_file(lockfile_path); | |
5551 | error: | |
5552 | return ret; | |
5553 | } | |
5554 | ||
cd9290dd | 5555 | /* |
022d91ba | 5556 | * Write agent TCP port using the rundir. |
cd9290dd | 5557 | */ |
4a15001e | 5558 | static int write_agent_port(void) |
cd9290dd DG |
5559 | { |
5560 | int ret; | |
5561 | char path[PATH_MAX]; | |
5562 | ||
5563 | assert(rundir); | |
5564 | ||
5565 | ret = snprintf(path, sizeof(path), "%s/" | |
022d91ba | 5566 | DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE, rundir); |
cd9290dd | 5567 | if (ret < 0) { |
022d91ba | 5568 | PERROR("snprintf agent port path"); |
cd9290dd DG |
5569 | goto error; |
5570 | } | |
5571 | ||
5572 | /* | |
4a15001e | 5573 | * Create TCP agent port file in rundir. |
cd9290dd | 5574 | */ |
4a15001e | 5575 | ret = utils_create_pid_file(agent_tcp_port, path); |
cd9290dd DG |
5576 | |
5577 | error: | |
4a15001e | 5578 | return ret; |
ef367a93 JG |
5579 | } |
5580 | ||
fac6795d DG |
5581 | /* |
5582 | * main | |
5583 | */ | |
5584 | int main(int argc, char **argv) | |
5585 | { | |
4a15001e | 5586 | int ret = 0, retval = 0; |
fac6795d | 5587 | void *status; |
ae9e45b3 | 5588 | const char *home_path, *env_app_timeout; |
fac6795d | 5589 | |
335a95b7 MD |
5590 | init_kernel_workarounds(); |
5591 | ||
f6a9efaa DG |
5592 | rcu_register_thread(); |
5593 | ||
4a15001e MD |
5594 | if (set_signal_handler()) { |
5595 | retval = -1; | |
5596 | goto exit_set_signal_handler; | |
0bb7724a DG |
5597 | } |
5598 | ||
7753dea8 | 5599 | setup_consumerd_path(); |
fb09408a | 5600 | |
12744796 DG |
5601 | page_size = sysconf(_SC_PAGESIZE); |
5602 | if (page_size < 0) { | |
5603 | PERROR("sysconf _SC_PAGESIZE"); | |
5604 | page_size = LONG_MAX; | |
5605 | WARN("Fallback page size to %ld", page_size); | |
5606 | } | |
5607 | ||
4a15001e MD |
5608 | /* |
5609 | * Parse arguments and load the daemon configuration file. | |
5610 | * | |
5611 | * We have an exit_options exit path to free memory reserved by | |
5612 | * set_options. This is needed because the rest of sessiond_cleanup() | |
5613 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
5614 | * depends on set_options. | |
5615 | */ | |
fac6795d | 5616 | progname = argv[0]; |
4a15001e MD |
5617 | if (set_options(argc, argv)) { |
5618 | retval = -1; | |
5619 | goto exit_options; | |
fac6795d DG |
5620 | } |
5621 | ||
5622 | /* Daemonize */ | |
72dd7491 | 5623 | if (opt_daemon || opt_background) { |
ceed52b5 MD |
5624 | int i; |
5625 | ||
72dd7491 MD |
5626 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
5627 | !opt_background); | |
53094c05 | 5628 | if (ret < 0) { |
4a15001e MD |
5629 | retval = -1; |
5630 | goto exit_options; | |
53094c05 | 5631 | } |
0bb7724a | 5632 | |
ceed52b5 | 5633 | /* |
0bb7724a | 5634 | * We are in the child. Make sure all other file descriptors are |
4a15001e MD |
5635 | * closed, in case we are called with more opened file |
5636 | * descriptors than the standard ones. | |
ceed52b5 MD |
5637 | */ |
5638 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
5639 | (void) close(i); | |
5640 | } | |
5641 | } | |
5642 | ||
7567352f MD |
5643 | if (run_as_create_worker(argv[0]) < 0) { |
5644 | goto exit_create_run_as_worker_cleanup; | |
5645 | } | |
5646 | ||
4a15001e MD |
5647 | /* |
5648 | * Starting from here, we can create threads. This needs to be after | |
5649 | * lttng_daemonize due to RCU. | |
5650 | */ | |
5651 | ||
5652 | /* | |
5653 | * Initialize the health check subsystem. This call should set the | |
5654 | * appropriate time values. | |
5655 | */ | |
5656 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
5657 | if (!health_sessiond) { | |
5658 | PERROR("health_app_create error"); | |
5659 | retval = -1; | |
5660 | goto exit_health_sessiond_cleanup; | |
5661 | } | |
5662 | ||
5663 | if (init_ht_cleanup_quit_pipe()) { | |
5664 | retval = -1; | |
5665 | goto exit_ht_cleanup_quit_pipe; | |
5666 | } | |
5667 | ||
5668 | /* Setup the thread ht_cleanup communication pipe. */ | |
5669 | if (utils_create_pipe_cloexec(ht_cleanup_pipe)) { | |
5670 | retval = -1; | |
5671 | goto exit_ht_cleanup_pipe; | |
5672 | } | |
5673 | ||
25b397f9 MD |
5674 | /* Set up max poll set size */ |
5675 | if (lttng_poll_set_max_size()) { | |
5676 | retval = -1; | |
5677 | goto exit_set_max_size; | |
5678 | } | |
5679 | ||
4a15001e MD |
5680 | /* Create thread to clean up RCU hash tables */ |
5681 | ret = pthread_create(&ht_cleanup_thread, NULL, | |
5682 | thread_ht_cleanup, (void *) NULL); | |
5683 | if (ret) { | |
5684 | errno = ret; | |
5685 | PERROR("pthread_create ht_cleanup"); | |
5686 | retval = -1; | |
5687 | goto exit_ht_cleanup; | |
5688 | } | |
5689 | ||
ceed52b5 | 5690 | /* Create thread quit pipe */ |
4a15001e MD |
5691 | if (init_thread_quit_pipe()) { |
5692 | retval = -1; | |
5693 | goto exit_init_data; | |
fac6795d DG |
5694 | } |
5695 | ||
5696 | /* Check if daemon is UID = 0 */ | |
5697 | is_root = !getuid(); | |
5698 | ||
fac6795d | 5699 | if (is_root) { |
990570ed | 5700 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
4ea184d1 | 5701 | if (!rundir) { |
4a15001e MD |
5702 | retval = -1; |
5703 | goto exit_init_data; | |
4ea184d1 | 5704 | } |
67e40797 DG |
5705 | |
5706 | /* Create global run dir with root access */ | |
4a15001e MD |
5707 | if (create_lttng_rundir(rundir)) { |
5708 | retval = -1; | |
5709 | goto exit_init_data; | |
d6f42150 DG |
5710 | } |
5711 | ||
fac6795d | 5712 | if (strlen(apps_unix_sock_path) == 0) { |
4a15001e | 5713 | ret = snprintf(apps_unix_sock_path, PATH_MAX, |
d6f42150 | 5714 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); |
4a15001e MD |
5715 | if (ret < 0) { |
5716 | retval = -1; | |
5717 | goto exit_init_data; | |
5718 | } | |
fac6795d DG |
5719 | } |
5720 | ||
5721 | if (strlen(client_unix_sock_path) == 0) { | |
4a15001e | 5722 | ret = snprintf(client_unix_sock_path, PATH_MAX, |
d6f42150 | 5723 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); |
4a15001e MD |
5724 | if (ret < 0) { |
5725 | retval = -1; | |
5726 | goto exit_init_data; | |
5727 | } | |
d6f42150 | 5728 | } |
0fdd1e2c DG |
5729 | |
5730 | /* Set global SHM for ust */ | |
5731 | if (strlen(wait_shm_path) == 0) { | |
4a15001e | 5732 | ret = snprintf(wait_shm_path, PATH_MAX, |
0fdd1e2c | 5733 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); |
4a15001e MD |
5734 | if (ret < 0) { |
5735 | retval = -1; | |
5736 | goto exit_init_data; | |
5737 | } | |
0fdd1e2c | 5738 | } |
67e40797 | 5739 | |
44a5e5eb | 5740 | if (strlen(health_unix_sock_path) == 0) { |
4a15001e MD |
5741 | ret = snprintf(health_unix_sock_path, |
5742 | sizeof(health_unix_sock_path), | |
44a5e5eb | 5743 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); |
4a15001e MD |
5744 | if (ret < 0) { |
5745 | retval = -1; | |
5746 | goto exit_init_data; | |
5747 | } | |
44a5e5eb DG |
5748 | } |
5749 | ||
67e40797 | 5750 | /* Setup kernel consumerd path */ |
4a15001e | 5751 | ret = snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5752 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5753 | if (ret < 0) { |
5754 | retval = -1; | |
5755 | goto exit_init_data; | |
5756 | } | |
5757 | ret = snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5758 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5759 | if (ret < 0) { |
5760 | retval = -1; | |
5761 | goto exit_init_data; | |
5762 | } | |
67e40797 DG |
5763 | |
5764 | DBG2("Kernel consumer err path: %s", | |
5765 | kconsumer_data.err_unix_sock_path); | |
5766 | DBG2("Kernel consumer cmd path: %s", | |
5767 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 5768 | } else { |
feb0f3e5 | 5769 | home_path = utils_get_home_dir(); |
b082db07 | 5770 | if (home_path == NULL) { |
273ea72c DG |
5771 | /* TODO: Add --socket PATH option */ |
5772 | ERR("Can't get HOME directory for sockets creation."); | |
4a15001e MD |
5773 | retval = -1; |
5774 | goto exit_init_data; | |
b082db07 DG |
5775 | } |
5776 | ||
67e40797 DG |
5777 | /* |
5778 | * Create rundir from home path. This will create something like | |
5779 | * $HOME/.lttng | |
5780 | */ | |
990570ed | 5781 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 | 5782 | if (ret < 0) { |
4a15001e MD |
5783 | retval = -1; |
5784 | goto exit_init_data; | |
67e40797 DG |
5785 | } |
5786 | ||
4a15001e MD |
5787 | if (create_lttng_rundir(rundir)) { |
5788 | retval = -1; | |
5789 | goto exit_init_data; | |
67e40797 DG |
5790 | } |
5791 | ||
fac6795d | 5792 | if (strlen(apps_unix_sock_path) == 0) { |
4a15001e MD |
5793 | ret = snprintf(apps_unix_sock_path, PATH_MAX, |
5794 | DEFAULT_HOME_APPS_UNIX_SOCK, | |
5795 | home_path); | |
5796 | if (ret < 0) { | |
5797 | retval = -1; | |
5798 | goto exit_init_data; | |
5799 | } | |
fac6795d DG |
5800 | } |
5801 | ||
5802 | /* Set the cli tool unix socket path */ | |
5803 | if (strlen(client_unix_sock_path) == 0) { | |
4a15001e MD |
5804 | ret = snprintf(client_unix_sock_path, PATH_MAX, |
5805 | DEFAULT_HOME_CLIENT_UNIX_SOCK, | |
5806 | home_path); | |
5807 | if (ret < 0) { | |
5808 | retval = -1; | |
5809 | goto exit_init_data; | |
5810 | } | |
fac6795d | 5811 | } |
0fdd1e2c DG |
5812 | |
5813 | /* Set global SHM for ust */ | |
5814 | if (strlen(wait_shm_path) == 0) { | |
4a15001e MD |
5815 | ret = snprintf(wait_shm_path, PATH_MAX, |
5816 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, | |
5817 | getuid()); | |
5818 | if (ret < 0) { | |
5819 | retval = -1; | |
5820 | goto exit_init_data; | |
5821 | } | |
0fdd1e2c | 5822 | } |
44a5e5eb DG |
5823 | |
5824 | /* Set health check Unix path */ | |
5825 | if (strlen(health_unix_sock_path) == 0) { | |
4a15001e MD |
5826 | ret = snprintf(health_unix_sock_path, |
5827 | sizeof(health_unix_sock_path), | |
5828 | DEFAULT_HOME_HEALTH_UNIX_SOCK, | |
5829 | home_path); | |
5830 | if (ret < 0) { | |
5831 | retval = -1; | |
5832 | goto exit_init_data; | |
5833 | } | |
44a5e5eb | 5834 | } |
fac6795d DG |
5835 | } |
5836 | ||
c9cb3e7d JG |
5837 | lockfile_fd = create_lockfile(); |
5838 | if (lockfile_fd < 0) { | |
4a15001e MD |
5839 | retval = -1; |
5840 | goto exit_init_data; | |
c9cb3e7d JG |
5841 | } |
5842 | ||
5c827ce0 DG |
5843 | /* Set consumer initial state */ |
5844 | kernel_consumerd_state = CONSUMER_STOPPED; | |
5845 | ust_consumerd_state = CONSUMER_STOPPED; | |
5846 | ||
847177cd DG |
5847 | DBG("Client socket path %s", client_unix_sock_path); |
5848 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 5849 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
5850 | DBG("LTTng run directory path: %s", rundir); |
5851 | ||
5852 | /* 32 bits consumerd path setup */ | |
4a15001e | 5853 | ret = snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5854 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5855 | if (ret < 0) { |
5856 | PERROR("snprintf 32-bit consumer error socket path"); | |
5857 | retval = -1; | |
5858 | goto exit_init_data; | |
5859 | } | |
5860 | ret = snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5861 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5862 | if (ret < 0) { |
5863 | PERROR("snprintf 32-bit consumer command socket path"); | |
5864 | retval = -1; | |
5865 | goto exit_init_data; | |
5866 | } | |
67e40797 DG |
5867 | |
5868 | DBG2("UST consumer 32 bits err path: %s", | |
5869 | ustconsumer32_data.err_unix_sock_path); | |
5870 | DBG2("UST consumer 32 bits cmd path: %s", | |
5871 | ustconsumer32_data.cmd_unix_sock_path); | |
5872 | ||
5873 | /* 64 bits consumerd path setup */ | |
4a15001e | 5874 | ret = snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5875 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5876 | if (ret < 0) { |
5877 | PERROR("snprintf 64-bit consumer error socket path"); | |
5878 | retval = -1; | |
5879 | goto exit_init_data; | |
5880 | } | |
5881 | ret = snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5882 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5883 | if (ret < 0) { |
5884 | PERROR("snprintf 64-bit consumer command socket path"); | |
5885 | retval = -1; | |
5886 | goto exit_init_data; | |
5887 | } | |
67e40797 DG |
5888 | |
5889 | DBG2("UST consumer 64 bits err path: %s", | |
5890 | ustconsumer64_data.err_unix_sock_path); | |
5891 | DBG2("UST consumer 64 bits cmd path: %s", | |
5892 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 5893 | |
273ea72c | 5894 | /* |
7d8234d9 | 5895 | * See if daemon already exist. |
fac6795d | 5896 | */ |
4a15001e | 5897 | if (check_existing_daemon()) { |
75462a81 | 5898 | ERR("Already running daemon.\n"); |
273ea72c | 5899 | /* |
cf3af59e MD |
5900 | * We do not goto exit because we must not cleanup() |
5901 | * because a daemon is already running. | |
ab118b20 | 5902 | */ |
4a15001e MD |
5903 | retval = -1; |
5904 | goto exit_init_data; | |
a88df331 DG |
5905 | } |
5906 | ||
1427f9b2 DG |
5907 | /* |
5908 | * Init UST app hash table. Alloc hash table before this point since | |
5909 | * cleanup() can get called after that point. | |
5910 | */ | |
4a15001e | 5911 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 5912 | ERR("Failed to allocate UST app hash table"); |
4a15001e MD |
5913 | retval = -1; |
5914 | goto exit_init_data; | |
5915 | } | |
1427f9b2 | 5916 | |
6a4e4039 JG |
5917 | /* |
5918 | * Initialize agent app hash table. We allocate the hash table here | |
5919 | * since cleanup() can get called after this point. | |
5920 | */ | |
5921 | if (agent_app_ht_alloc()) { | |
5922 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e MD |
5923 | retval = -1; |
5924 | goto exit_init_data; | |
f20baf8e DG |
5925 | } |
5926 | ||
a88df331 DG |
5927 | /* |
5928 | * These actions must be executed as root. We do that *after* setting up | |
5929 | * the sockets path because we MUST make the check for another daemon using | |
5930 | * those paths *before* trying to set the kernel consumer sockets and init | |
5931 | * kernel tracer. | |
5932 | */ | |
5933 | if (is_root) { | |
4a15001e MD |
5934 | if (set_consumer_sockets(&kconsumer_data, rundir)) { |
5935 | retval = -1; | |
5936 | goto exit_init_data; | |
7753dea8 MD |
5937 | } |
5938 | ||
a88df331 | 5939 | /* Setup kernel tracer */ |
4fba7219 DG |
5940 | if (!opt_no_kernel) { |
5941 | init_kernel_tracer(); | |
89588270 DG |
5942 | if (kernel_tracer_fd >= 0) { |
5943 | ret = syscall_init_table(); | |
5944 | if (ret < 0) { | |
4a15001e MD |
5945 | ERR("Unable to populate syscall table. " |
5946 | "Syscall tracing won't work " | |
5947 | "for this session daemon."); | |
89588270 | 5948 | } |
834978fd | 5949 | } |
4fba7219 | 5950 | } |
a88df331 DG |
5951 | |
5952 | /* Set ulimit for open files */ | |
5953 | set_ulimit(); | |
fac6795d | 5954 | } |
4063050c MD |
5955 | /* init lttng_fd tracking must be done after set_ulimit. */ |
5956 | lttng_fd_init(); | |
fac6795d | 5957 | |
4a15001e MD |
5958 | if (set_consumer_sockets(&ustconsumer64_data, rundir)) { |
5959 | retval = -1; | |
5960 | goto exit_init_data; | |
67e40797 DG |
5961 | } |
5962 | ||
4a15001e MD |
5963 | if (set_consumer_sockets(&ustconsumer32_data, rundir)) { |
5964 | retval = -1; | |
5965 | goto exit_init_data; | |
67e40797 DG |
5966 | } |
5967 | ||
d6f42150 | 5968 | /* Setup the needed unix socket */ |
4a15001e MD |
5969 | if (init_daemon_socket()) { |
5970 | retval = -1; | |
5971 | goto exit_init_data; | |
fac6795d DG |
5972 | } |
5973 | ||
5974 | /* Set credentials to socket */ | |
4a15001e MD |
5975 | if (is_root && set_permissions(rundir)) { |
5976 | retval = -1; | |
5977 | goto exit_init_data; | |
fac6795d DG |
5978 | } |
5979 | ||
5b8719f5 DG |
5980 | /* Get parent pid if -S, --sig-parent is specified. */ |
5981 | if (opt_sig_parent) { | |
5982 | ppid = getppid(); | |
5983 | } | |
5984 | ||
7a485870 | 5985 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 | 5986 | if (is_root && !opt_no_kernel) { |
4a15001e MD |
5987 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
5988 | retval = -1; | |
5989 | goto exit_init_data; | |
6620da75 | 5990 | } |
7a485870 DG |
5991 | } |
5992 | ||
099e26bd | 5993 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
5994 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
5995 | retval = -1; | |
5996 | goto exit_init_data; | |
099e26bd DG |
5997 | } |
5998 | ||
d0b96690 | 5999 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
6000 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
6001 | retval = -1; | |
6002 | goto exit_init_data; | |
d0b96690 DG |
6003 | } |
6004 | ||
7972aab2 DG |
6005 | /* Initialize global buffer per UID and PID registry. */ |
6006 | buffer_reg_init_uid_registry(); | |
6007 | buffer_reg_init_pid_registry(); | |
6008 | ||
099e26bd | 6009 | /* Init UST command queue. */ |
8bdee6e2 | 6010 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 6011 | |
273ea72c | 6012 | /* |
4a15001e MD |
6013 | * Get session list pointer. This pointer MUST NOT be free'd. This list |
6014 | * is statically declared in session.c | |
273ea72c | 6015 | */ |
54d01ffb | 6016 | session_list_ptr = session_get_list(); |
b5541356 | 6017 | |
2f77fc4b | 6018 | cmd_init(); |
00e2e675 | 6019 | |
ae9e45b3 DG |
6020 | /* Check for the application socket timeout env variable. */ |
6021 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
6022 | if (env_app_timeout) { | |
6023 | app_socket_timeout = atoi(env_app_timeout); | |
6024 | } else { | |
6025 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
6026 | } | |
6027 | ||
4a15001e MD |
6028 | ret = write_pidfile(); |
6029 | if (ret) { | |
6030 | ERR("Error in write_pidfile"); | |
6031 | retval = -1; | |
6032 | goto exit_init_data; | |
6033 | } | |
6034 | ret = write_agent_port(); | |
6035 | if (ret) { | |
6036 | ERR("Error in write_agent_port"); | |
6037 | retval = -1; | |
6038 | goto exit_init_data; | |
6039 | } | |
35f90c40 | 6040 | |
554831e7 MD |
6041 | /* Initialize communication library */ |
6042 | lttcomm_init(); | |
4a15001e | 6043 | /* Initialize TCP timeout values */ |
d831c249 | 6044 | lttcomm_inet_init(); |
554831e7 | 6045 | |
ef367a93 | 6046 | if (load_session_init_data(&load_info) < 0) { |
4a15001e MD |
6047 | retval = -1; |
6048 | goto exit_init_data; | |
ef367a93 JG |
6049 | } |
6050 | load_info->path = opt_load_session_path; | |
6051 | ||
d5b9fd2f | 6052 | /* Create health-check thread */ |
44a5e5eb DG |
6053 | ret = pthread_create(&health_thread, NULL, |
6054 | thread_manage_health, (void *) NULL); | |
4a15001e MD |
6055 | if (ret) { |
6056 | errno = ret; | |
44a5e5eb | 6057 | PERROR("pthread_create health"); |
4a15001e | 6058 | retval = -1; |
44a5e5eb DG |
6059 | goto exit_health; |
6060 | } | |
6061 | ||
cf3af59e | 6062 | /* Create thread to manage the client socket */ |
099e26bd DG |
6063 | ret = pthread_create(&client_thread, NULL, |
6064 | thread_manage_clients, (void *) NULL); | |
4a15001e MD |
6065 | if (ret) { |
6066 | errno = ret; | |
76d7553f | 6067 | PERROR("pthread_create clients"); |
4a15001e | 6068 | retval = -1; |
cf3af59e MD |
6069 | goto exit_client; |
6070 | } | |
fac6795d | 6071 | |
099e26bd DG |
6072 | /* Create thread to dispatch registration */ |
6073 | ret = pthread_create(&dispatch_thread, NULL, | |
6074 | thread_dispatch_ust_registration, (void *) NULL); | |
4a15001e MD |
6075 | if (ret) { |
6076 | errno = ret; | |
76d7553f | 6077 | PERROR("pthread_create dispatch"); |
4a15001e | 6078 | retval = -1; |
099e26bd DG |
6079 | goto exit_dispatch; |
6080 | } | |
6081 | ||
6082 | /* Create thread to manage application registration. */ | |
6083 | ret = pthread_create(®_apps_thread, NULL, | |
6084 | thread_registration_apps, (void *) NULL); | |
4a15001e MD |
6085 | if (ret) { |
6086 | errno = ret; | |
76d7553f | 6087 | PERROR("pthread_create registration"); |
4a15001e | 6088 | retval = -1; |
099e26bd DG |
6089 | goto exit_reg_apps; |
6090 | } | |
6091 | ||
cf3af59e | 6092 | /* Create thread to manage application socket */ |
54d01ffb DG |
6093 | ret = pthread_create(&apps_thread, NULL, |
6094 | thread_manage_apps, (void *) NULL); | |
4a15001e MD |
6095 | if (ret) { |
6096 | errno = ret; | |
d0b96690 | 6097 | PERROR("pthread_create apps"); |
4a15001e | 6098 | retval = -1; |
d0b96690 DG |
6099 | goto exit_apps; |
6100 | } | |
6101 | ||
6102 | /* Create thread to manage application notify socket */ | |
6103 | ret = pthread_create(&apps_notify_thread, NULL, | |
6104 | ust_thread_manage_notify, (void *) NULL); | |
4a15001e MD |
6105 | if (ret) { |
6106 | errno = ret; | |
f5c32ef1 | 6107 | PERROR("pthread_create notify"); |
4a15001e | 6108 | retval = -1; |
9563b0ad | 6109 | goto exit_apps_notify; |
cf3af59e | 6110 | } |
fac6795d | 6111 | |
022d91ba DG |
6112 | /* Create agent registration thread. */ |
6113 | ret = pthread_create(&agent_reg_thread, NULL, | |
6114 | agent_thread_manage_registration, (void *) NULL); | |
4a15001e MD |
6115 | if (ret) { |
6116 | errno = ret; | |
022d91ba | 6117 | PERROR("pthread_create agent"); |
4a15001e | 6118 | retval = -1; |
022d91ba | 6119 | goto exit_agent_reg; |
4d076222 DG |
6120 | } |
6121 | ||
6620da75 DG |
6122 | /* Don't start this thread if kernel tracing is not requested nor root */ |
6123 | if (is_root && !opt_no_kernel) { | |
6124 | /* Create kernel thread to manage kernel event */ | |
6125 | ret = pthread_create(&kernel_thread, NULL, | |
6126 | thread_manage_kernel, (void *) NULL); | |
4a15001e MD |
6127 | if (ret) { |
6128 | errno = ret; | |
6620da75 | 6129 | PERROR("pthread_create kernel"); |
4a15001e | 6130 | retval = -1; |
6620da75 DG |
6131 | goto exit_kernel; |
6132 | } | |
ef367a93 | 6133 | } |
7a485870 | 6134 | |
4a15001e MD |
6135 | /* Create session loading thread. */ |
6136 | ret = pthread_create(&load_session_thread, NULL, thread_load_session, | |
6137 | load_info); | |
6138 | if (ret) { | |
6139 | errno = ret; | |
6140 | PERROR("pthread_create load_session_thread"); | |
6141 | retval = -1; | |
6142 | goto exit_load_session; | |
6143 | } | |
6144 | ||
6145 | /* | |
6146 | * This is where we start awaiting program completion (e.g. through | |
6147 | * signal that asks threads to teardown). | |
6148 | */ | |
6149 | ||
6150 | ret = pthread_join(load_session_thread, &status); | |
6151 | if (ret) { | |
6152 | errno = ret; | |
6153 | PERROR("pthread_join load_session_thread"); | |
6154 | retval = -1; | |
6155 | } | |
6156 | exit_load_session: | |
ef367a93 JG |
6157 | |
6158 | if (is_root && !opt_no_kernel) { | |
6620da75 | 6159 | ret = pthread_join(kernel_thread, &status); |
4a15001e MD |
6160 | if (ret) { |
6161 | errno = ret; | |
6620da75 | 6162 | PERROR("pthread_join"); |
4a15001e | 6163 | retval = -1; |
6620da75 | 6164 | } |
fac6795d | 6165 | } |
cf3af59e | 6166 | exit_kernel: |
4a15001e | 6167 | |
022d91ba | 6168 | ret = pthread_join(agent_reg_thread, &status); |
4a15001e MD |
6169 | if (ret) { |
6170 | errno = ret; | |
022d91ba | 6171 | PERROR("pthread_join agent"); |
4a15001e | 6172 | retval = -1; |
4d076222 | 6173 | } |
022d91ba | 6174 | exit_agent_reg: |
4a15001e | 6175 | |
9563b0ad | 6176 | ret = pthread_join(apps_notify_thread, &status); |
4a15001e MD |
6177 | if (ret) { |
6178 | errno = ret; | |
9563b0ad | 6179 | PERROR("pthread_join apps notify"); |
4a15001e | 6180 | retval = -1; |
9563b0ad | 6181 | } |
9563b0ad | 6182 | exit_apps_notify: |
4a15001e | 6183 | |
cf3af59e | 6184 | ret = pthread_join(apps_thread, &status); |
4a15001e MD |
6185 | if (ret) { |
6186 | errno = ret; | |
9563b0ad | 6187 | PERROR("pthread_join apps"); |
4a15001e | 6188 | retval = -1; |
cf3af59e | 6189 | } |
cf3af59e | 6190 | exit_apps: |
4a15001e | 6191 | |
099e26bd | 6192 | ret = pthread_join(reg_apps_thread, &status); |
4a15001e MD |
6193 | if (ret) { |
6194 | errno = ret; | |
76d7553f | 6195 | PERROR("pthread_join"); |
4a15001e | 6196 | retval = -1; |
099e26bd | 6197 | } |
099e26bd | 6198 | exit_reg_apps: |
4a15001e | 6199 | |
772b8f4d MD |
6200 | /* |
6201 | * Join dispatch thread after joining reg_apps_thread to ensure | |
6202 | * we don't leak applications in the queue. | |
6203 | */ | |
099e26bd | 6204 | ret = pthread_join(dispatch_thread, &status); |
4a15001e MD |
6205 | if (ret) { |
6206 | errno = ret; | |
76d7553f | 6207 | PERROR("pthread_join"); |
4a15001e | 6208 | retval = -1; |
099e26bd | 6209 | } |
099e26bd | 6210 | exit_dispatch: |
4a15001e | 6211 | |
cf3af59e | 6212 | ret = pthread_join(client_thread, &status); |
4a15001e MD |
6213 | if (ret) { |
6214 | errno = ret; | |
76d7553f | 6215 | PERROR("pthread_join"); |
4a15001e | 6216 | retval = -1; |
cf3af59e | 6217 | } |
4a15001e | 6218 | exit_client: |
a88df331 | 6219 | |
4a15001e MD |
6220 | ret = pthread_join(health_thread, &status); |
6221 | if (ret) { | |
6222 | errno = ret; | |
6223 | PERROR("pthread_join health thread"); | |
6224 | retval = -1; | |
06f525de | 6225 | } |
4a15001e | 6226 | exit_health: |
06f525de | 6227 | |
4a15001e | 6228 | exit_init_data: |
19154d2a MD |
6229 | /* |
6230 | * Wait for all pending call_rcu work to complete before tearing | |
6231 | * down data structures. call_rcu worker may be trying to | |
6232 | * perform lookups in those structures. | |
6233 | */ | |
6234 | rcu_barrier(); | |
4a15001e MD |
6235 | /* |
6236 | * sessiond_cleanup() is called when no other thread is running, except | |
6237 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
6238 | */ | |
6239 | rcu_thread_online(); | |
6240 | sessiond_cleanup(); | |
6241 | rcu_thread_offline(); | |
6242 | rcu_unregister_thread(); | |
06f525de | 6243 | |
7a15c0ae JG |
6244 | /* |
6245 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
6246 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
6247 | * the queue is empty before shutting down the clean-up thread. | |
6248 | */ | |
6249 | rcu_barrier(); | |
6250 | ||
4a15001e MD |
6251 | ret = notify_thread_pipe(ht_cleanup_quit_pipe[1]); |
6252 | if (ret < 0) { | |
6253 | ERR("write error on ht_cleanup quit pipe"); | |
6254 | retval = -1; | |
06f525de DG |
6255 | } |
6256 | ||
0b2dc8df | 6257 | ret = pthread_join(ht_cleanup_thread, &status); |
4a15001e MD |
6258 | if (ret) { |
6259 | errno = ret; | |
0b2dc8df | 6260 | PERROR("pthread_join ht cleanup thread"); |
4a15001e | 6261 | retval = -1; |
0b2dc8df MD |
6262 | } |
6263 | exit_ht_cleanup: | |
25b397f9 | 6264 | exit_set_max_size: |
4a15001e MD |
6265 | |
6266 | utils_close_pipe(ht_cleanup_pipe); | |
6267 | exit_ht_cleanup_pipe: | |
6268 | ||
cf3af59e | 6269 | /* |
4a15001e | 6270 | * Close the ht_cleanup quit pipe. |
cf3af59e | 6271 | */ |
4a15001e MD |
6272 | utils_close_pipe(ht_cleanup_quit_pipe); |
6273 | exit_ht_cleanup_quit_pipe: | |
6274 | ||
6275 | health_app_destroy(health_sessiond); | |
6276 | exit_health_sessiond_cleanup: | |
7567352f | 6277 | exit_create_run_as_worker_cleanup: |
4a15001e MD |
6278 | |
6279 | exit_options: | |
6280 | sessiond_cleanup_options(); | |
6281 | ||
6282 | exit_set_signal_handler: | |
0658924e | 6283 | |
4a15001e | 6284 | if (!retval) { |
cf3af59e | 6285 | exit(EXIT_SUCCESS); |
4a15001e MD |
6286 | } else { |
6287 | exit(EXIT_FAILURE); | |
67e40797 | 6288 | } |
fac6795d | 6289 | } |