Commit | Line | Data |
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826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
0fdd1e2c | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
26296c48 | 4 | * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 5 | * |
d14d33bf AM |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License, version 2 only, | |
8 | * as published by the Free Software Foundation. | |
91d76f53 | 9 | * |
d14d33bf AM |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
91d76f53 | 14 | * |
d14d33bf AM |
15 | * You should have received a copy of the GNU General Public License along |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
fac6795d DG |
18 | */ |
19 | ||
6c1c0768 | 20 | #define _LGPL_SOURCE |
fac6795d DG |
21 | #include <getopt.h> |
22 | #include <grp.h> | |
23 | #include <limits.h> | |
0bb7724a | 24 | #include <paths.h> |
fac6795d DG |
25 | #include <pthread.h> |
26 | #include <signal.h> | |
27 | #include <stdio.h> | |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
331744e3 | 30 | #include <inttypes.h> |
0fdd1e2c | 31 | #include <sys/mman.h> |
b73401da | 32 | #include <sys/mount.h> |
1e307fab | 33 | #include <sys/resource.h> |
fac6795d DG |
34 | #include <sys/socket.h> |
35 | #include <sys/stat.h> | |
36 | #include <sys/types.h> | |
0fdd1e2c | 37 | #include <sys/wait.h> |
5c827ce0 | 38 | #include <urcu/uatomic.h> |
fac6795d | 39 | #include <unistd.h> |
4f0b90ee | 40 | #include <ctype.h> |
fac6795d | 41 | |
990570ed | 42 | #include <common/common.h> |
d27c42b8 | 43 | #include <common/compat/socket.h> |
e8fa9fb0 | 44 | #include <common/compat/getenv.h> |
db758600 DG |
45 | #include <common/defaults.h> |
46 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 47 | #include <common/futex.h> |
00e2e675 | 48 | #include <common/relayd/relayd.h> |
81b86775 | 49 | #include <common/utils.h> |
3ccdf997 | 50 | #include <common/daemonize.h> |
f40ef1d5 | 51 | #include <common/config/session-config.h> |
fac6795d | 52 | |
10a8a223 | 53 | #include "lttng-sessiond.h" |
7972aab2 | 54 | #include "buffer-registry.h" |
54d01ffb | 55 | #include "channel.h" |
2f77fc4b | 56 | #include "cmd.h" |
00e2e675 | 57 | #include "consumer.h" |
099e26bd | 58 | #include "context.h" |
54d01ffb | 59 | #include "event.h" |
4771f025 | 60 | #include "kernel.h" |
f1e16794 | 61 | #include "kernel-consumer.h" |
096102bd | 62 | #include "modprobe.h" |
0fdd1e2c | 63 | #include "shm.h" |
1e307fab | 64 | #include "ust-ctl.h" |
00e2e675 | 65 | #include "ust-consumer.h" |
8e68d1c8 | 66 | #include "utils.h" |
4063050c | 67 | #include "fd-limit.h" |
8782cc74 | 68 | #include "health-sessiond.h" |
8ac94142 | 69 | #include "testpoint.h" |
d0b96690 | 70 | #include "ust-thread.h" |
022d91ba | 71 | #include "agent-thread.h" |
fb198a11 | 72 | #include "save.h" |
ef367a93 | 73 | #include "load-session-thread.h" |
b3530820 JG |
74 | #include "notification-thread.h" |
75 | #include "notification-thread-commands.h" | |
6e0be6cc | 76 | #include "rotation-thread.h" |
834978fd | 77 | #include "syscall.h" |
7c1d2758 | 78 | #include "agent.h" |
5e97de00 | 79 | #include "ht-cleanup.h" |
55c2a7f9 | 80 | #include "sessiond-timer.h" |
fac6795d | 81 | |
ebaeda94 MD |
82 | #define CONSUMERD_FILE "lttng-consumerd" |
83 | ||
4fc83d94 PP |
84 | static const char *help_msg = |
85 | #ifdef LTTNG_EMBED_HELP | |
86 | #include <lttng-sessiond.8.h> | |
87 | #else | |
88 | NULL | |
89 | #endif | |
90 | ; | |
91 | ||
fac6795d | 92 | const char *progname; |
b3530820 | 93 | const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
26296c48 JG |
94 | static int tracing_group_name_override; |
95 | static char *opt_pidfile; | |
5b8719f5 | 96 | static int opt_sig_parent; |
97e19046 | 97 | static int opt_verbose_consumer; |
72dd7491 | 98 | static int opt_daemon, opt_background; |
4fba7219 | 99 | static int opt_no_kernel; |
ef367a93 | 100 | static char *opt_load_session_path; |
1d4b027a | 101 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
0bb7724a | 102 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ |
67e40797 | 103 | static char *rundir; |
c9cb3e7d | 104 | static int lockfile_fd = -1; |
3bd1e081 | 105 | |
0bb7724a DG |
106 | /* Set to 1 when a SIGUSR1 signal is received. */ |
107 | static int recv_child_signal; | |
108 | ||
a23ec3a7 DG |
109 | /* |
110 | * Consumer daemon specific control data. Every value not initialized here is | |
111 | * set to 0 by the static definition. | |
112 | */ | |
3bd1e081 MD |
113 | static struct consumer_data kconsumer_data = { |
114 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
115 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
116 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
03550b58 MD |
117 | .err_sock = -1, |
118 | .cmd_sock = -1, | |
b3530820 | 119 | .channel_monitor_pipe = -1, |
6e0be6cc | 120 | .channel_rotate_pipe = -1, |
173af62f DG |
121 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
122 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
123 | .cond = PTHREAD_COND_INITIALIZER, |
124 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 125 | }; |
7753dea8 MD |
126 | static struct consumer_data ustconsumer64_data = { |
127 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
128 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
129 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
130 | .err_sock = -1, |
131 | .cmd_sock = -1, | |
b3530820 | 132 | .channel_monitor_pipe = -1, |
6e0be6cc | 133 | .channel_rotate_pipe = -1, |
173af62f DG |
134 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
135 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
136 | .cond = PTHREAD_COND_INITIALIZER, |
137 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
138 | }; |
139 | static struct consumer_data ustconsumer32_data = { | |
140 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
141 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
142 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
143 | .err_sock = -1, |
144 | .cmd_sock = -1, | |
b3530820 | 145 | .channel_monitor_pipe = -1, |
6e0be6cc | 146 | .channel_rotate_pipe = -1, |
173af62f DG |
147 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
148 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
149 | .cond = PTHREAD_COND_INITIALIZER, |
150 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
151 | }; |
152 | ||
26296c48 JG |
153 | /* Command line options */ |
154 | static const struct option long_options[] = { | |
0f5ea17c JG |
155 | { "client-sock", required_argument, 0, 'c' }, |
156 | { "apps-sock", required_argument, 0, 'a' }, | |
157 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
158 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
159 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
160 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
161 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
162 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
163 | { "consumerd32-path", required_argument, 0, '\0' }, | |
164 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
165 | { "consumerd64-path", required_argument, 0, '\0' }, | |
166 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
167 | { "daemonize", no_argument, 0, 'd' }, | |
168 | { "background", no_argument, 0, 'b' }, | |
169 | { "sig-parent", no_argument, 0, 'S' }, | |
170 | { "help", no_argument, 0, 'h' }, | |
171 | { "group", required_argument, 0, 'g' }, | |
172 | { "version", no_argument, 0, 'V' }, | |
173 | { "quiet", no_argument, 0, 'q' }, | |
174 | { "verbose", no_argument, 0, 'v' }, | |
175 | { "verbose-consumer", no_argument, 0, '\0' }, | |
176 | { "no-kernel", no_argument, 0, '\0' }, | |
177 | { "pidfile", required_argument, 0, 'p' }, | |
178 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
179 | { "config", required_argument, 0, 'f' }, | |
180 | { "load", required_argument, 0, 'l' }, | |
181 | { "kmod-probes", required_argument, 0, '\0' }, | |
182 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
26296c48 JG |
183 | { NULL, 0, 0, 0 } |
184 | }; | |
185 | ||
186 | /* Command line options to ignore from configuration file */ | |
187 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
188 | ||
26c9d55e | 189 | /* Shared between threads */ |
099e26bd | 190 | static int dispatch_thread_exit; |
fac6795d | 191 | |
54d01ffb DG |
192 | /* Global application Unix socket path */ |
193 | static char apps_unix_sock_path[PATH_MAX]; | |
194 | /* Global client Unix socket path */ | |
195 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
196 | /* global wait shm path for UST */ |
197 | static char wait_shm_path[PATH_MAX]; | |
44a5e5eb DG |
198 | /* Global health check unix path */ |
199 | static char health_unix_sock_path[PATH_MAX]; | |
fac6795d | 200 | |
1d4b027a | 201 | /* Sockets and FDs */ |
a4b35e07 MD |
202 | static int client_sock = -1; |
203 | static int apps_sock = -1; | |
2f77fc4b | 204 | int kernel_tracer_fd = -1; |
76d7553f | 205 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 206 | |
273ea72c DG |
207 | /* |
208 | * Quit pipe for all threads. This permits a single cancellation point | |
209 | * for all threads when receiving an event on the pipe. | |
210 | */ | |
76d7553f | 211 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 212 | |
099e26bd DG |
213 | /* |
214 | * This pipe is used to inform the thread managing application communication | |
215 | * that a command is queued and ready to be processed. | |
216 | */ | |
76d7553f | 217 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 218 | |
d0b96690 DG |
219 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
220 | ||
55c2a7f9 JD |
221 | /* |
222 | * Pipe to wakeup the rotation thread when the | |
223 | * LTTNG_SESSIOND_SIG_ROTATE_PENDING signal is caught. | |
224 | */ | |
225 | static int rotate_timer_pipe[2] = { -1, -1 }; | |
226 | ||
1d4b027a | 227 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 228 | static pthread_t apps_thread; |
d0b96690 | 229 | static pthread_t apps_notify_thread; |
099e26bd | 230 | static pthread_t reg_apps_thread; |
1d4b027a | 231 | static pthread_t client_thread; |
7a485870 | 232 | static pthread_t kernel_thread; |
099e26bd | 233 | static pthread_t dispatch_thread; |
44a5e5eb | 234 | static pthread_t health_thread; |
0b2dc8df | 235 | static pthread_t ht_cleanup_thread; |
022d91ba | 236 | static pthread_t agent_reg_thread; |
ef367a93 | 237 | static pthread_t load_session_thread; |
b3530820 | 238 | static pthread_t notification_thread; |
6e0be6cc | 239 | static pthread_t rotation_thread; |
55c2a7f9 | 240 | static pthread_t timer_thread; |
5eb91c98 | 241 | |
099e26bd DG |
242 | /* |
243 | * UST registration command queue. This queue is tied with a futex and uses a N | |
244 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
245 | * | |
b22c5da8 DG |
246 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
247 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
248 | * the line new application socket and monitors it for any I/O error or clean | |
249 | * close that triggers an unregistration of the application. | |
099e26bd DG |
250 | */ |
251 | static struct ust_cmd_queue ust_cmd_queue; | |
252 | ||
b5541356 DG |
253 | /* |
254 | * Pointer initialized before thread creation. | |
255 | * | |
256 | * This points to the tracing session list containing the session count and a | |
257 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
258 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 259 | * |
d063d709 | 260 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 261 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
262 | */ |
263 | static struct ltt_session_list *session_list_ptr; | |
264 | ||
7753dea8 MD |
265 | int ust_consumerd64_fd = -1; |
266 | int ust_consumerd32_fd = -1; | |
267 | ||
fb6f1fa2 YB |
268 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
269 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
270 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
271 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
26296c48 JG |
272 | static int consumerd32_bin_override; |
273 | static int consumerd64_bin_override; | |
274 | static int consumerd32_libdir_override; | |
275 | static int consumerd64_libdir_override; | |
fb09408a | 276 | |
2f77fc4b DG |
277 | static const char *module_proc_lttng = "/proc/lttng"; |
278 | ||
5c827ce0 DG |
279 | /* |
280 | * Consumer daemon state which is changed when spawning it, killing it or in | |
281 | * case of a fatal error. | |
282 | */ | |
283 | enum consumerd_state { | |
284 | CONSUMER_STARTED = 1, | |
285 | CONSUMER_STOPPED = 2, | |
286 | CONSUMER_ERROR = 3, | |
287 | }; | |
288 | ||
289 | /* | |
290 | * This consumer daemon state is used to validate if a client command will be | |
291 | * able to reach the consumer. If not, the client is informed. For instance, | |
292 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
293 | * error to the client. | |
294 | * | |
295 | * The following example shows a possible race condition of this scheme: | |
296 | * | |
297 | * consumer thread error happens | |
298 | * client cmd arrives | |
299 | * client cmd checks state -> still OK | |
300 | * consumer thread exit, sets error | |
301 | * client cmd try to talk to consumer | |
302 | * ... | |
303 | * | |
304 | * However, since the consumer is a different daemon, we have no way of making | |
305 | * sure the command will reach it safely even with this state flag. This is why | |
306 | * we consider that up to the state validation during command processing, the | |
307 | * command is safe. After that, we can not guarantee the correctness of the | |
308 | * client request vis-a-vis the consumer. | |
309 | */ | |
310 | static enum consumerd_state ust_consumerd_state; | |
311 | static enum consumerd_state kernel_consumerd_state; | |
312 | ||
ae9e45b3 DG |
313 | /* |
314 | * Socket timeout for receiving and sending in seconds. | |
315 | */ | |
316 | static int app_socket_timeout; | |
317 | ||
12744796 DG |
318 | /* Set in main() with the current page size. */ |
319 | long page_size; | |
320 | ||
8782cc74 MD |
321 | /* Application health monitoring */ |
322 | struct health_app *health_sessiond; | |
323 | ||
022d91ba DG |
324 | /* Agent TCP port for registration. Used by the agent thread. */ |
325 | unsigned int agent_tcp_port = DEFAULT_AGENT_TCP_PORT; | |
4d076222 | 326 | |
f43f95a9 DG |
327 | /* Am I root or not. */ |
328 | int is_root; /* Set to 1 if the daemon is running as root */ | |
329 | ||
26296c48 JG |
330 | const char * const config_section_name = "sessiond"; |
331 | ||
ef367a93 JG |
332 | /* Load session thread information to operate. */ |
333 | struct load_session_thread_data *load_info; | |
334 | ||
b3530820 JG |
335 | /* Notification thread handle. */ |
336 | struct notification_thread_handle *notification_thread_handle; | |
337 | ||
6e0be6cc JD |
338 | /* Rotation thread handle. */ |
339 | struct rotation_thread_handle *rotation_thread_handle; | |
340 | ||
7c1d2758 JG |
341 | /* Global hash tables */ |
342 | struct lttng_ht *agent_apps_ht_by_sock = NULL; | |
343 | ||
97bc1426 | 344 | /* |
b3530820 JG |
345 | * Whether sessiond is ready for commands/notification channel/health check |
346 | * requests. | |
97bc1426 | 347 | * NR_LTTNG_SESSIOND_READY must match the number of calls to |
ef367a93 | 348 | * sessiond_notify_ready(). |
97bc1426 | 349 | */ |
6e0be6cc | 350 | #define NR_LTTNG_SESSIOND_READY 5 |
97bc1426 MD |
351 | int lttng_sessiond_ready = NR_LTTNG_SESSIOND_READY; |
352 | ||
5e97de00 JG |
353 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
354 | { | |
355 | return (fd == thread_quit_pipe[0] && (events & LPOLLIN)) ? 1 : 0; | |
356 | } | |
357 | ||
97bc1426 | 358 | /* Notify parents that we are ready for cmd and health check */ |
ef367a93 JG |
359 | LTTNG_HIDDEN |
360 | void sessiond_notify_ready(void) | |
97bc1426 MD |
361 | { |
362 | if (uatomic_sub_return(<tng_sessiond_ready, 1) == 0) { | |
363 | /* | |
364 | * Notify parent pid that we are ready to accept command | |
365 | * for client side. This ppid is the one from the | |
366 | * external process that spawned us. | |
367 | */ | |
368 | if (opt_sig_parent) { | |
369 | kill(ppid, SIGUSR1); | |
370 | } | |
371 | ||
372 | /* | |
373 | * Notify the parent of the fork() process that we are | |
374 | * ready. | |
375 | */ | |
72dd7491 | 376 | if (opt_daemon || opt_background) { |
97bc1426 MD |
377 | kill(child_ppid, SIGUSR1); |
378 | } | |
379 | } | |
380 | } | |
381 | ||
fb09408a | 382 | static |
7753dea8 | 383 | void setup_consumerd_path(void) |
fb09408a | 384 | { |
fc7a59ce | 385 | const char *bin, *libdir; |
fb09408a | 386 | |
7753dea8 MD |
387 | /* |
388 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
389 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
390 | * has not been defined. | |
7753dea8 | 391 | */ |
ebaeda94 | 392 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
393 | if (!consumerd32_bin[0]) { |
394 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
395 | } |
396 | if (!consumerd32_libdir[0]) { | |
397 | consumerd32_libdir = INSTALL_LIB_PATH; | |
398 | } | |
399 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
400 | if (!consumerd64_bin[0]) { |
401 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 402 | } |
ebaeda94 MD |
403 | if (!consumerd64_libdir[0]) { |
404 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
405 | } |
406 | #else | |
407 | #error "Unknown bitness" | |
408 | #endif | |
409 | ||
fb09408a MD |
410 | /* |
411 | * runtime env. var. overrides the build default. | |
412 | */ | |
e8fa9fb0 | 413 | bin = lttng_secure_getenv("LTTNG_CONSUMERD32_BIN"); |
fc7a59ce AM |
414 | if (bin) { |
415 | consumerd32_bin = bin; | |
7753dea8 | 416 | } |
e8fa9fb0 | 417 | bin = lttng_secure_getenv("LTTNG_CONSUMERD64_BIN"); |
fc7a59ce AM |
418 | if (bin) { |
419 | consumerd64_bin = bin; | |
ebaeda94 | 420 | } |
e8fa9fb0 | 421 | libdir = lttng_secure_getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
422 | if (libdir) { |
423 | consumerd32_libdir = libdir; | |
424 | } | |
e8fa9fb0 | 425 | libdir = lttng_secure_getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
426 | if (libdir) { |
427 | consumerd64_libdir = libdir; | |
fb09408a MD |
428 | } |
429 | } | |
430 | ||
4a15001e MD |
431 | static |
432 | int __sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size, | |
433 | int *a_pipe) | |
5eb91c98 DG |
434 | { |
435 | int ret; | |
436 | ||
d0b96690 | 437 | assert(events); |
5eb91c98 DG |
438 | |
439 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
440 | if (ret < 0) { | |
441 | goto error; | |
442 | } | |
443 | ||
444 | /* Add quit pipe */ | |
4a15001e | 445 | ret = lttng_poll_add(events, a_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
446 | if (ret < 0) { |
447 | goto error; | |
448 | } | |
449 | ||
450 | return 0; | |
451 | ||
452 | error: | |
453 | return ret; | |
454 | } | |
455 | ||
4a15001e MD |
456 | /* |
457 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
458 | */ | |
459 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) | |
460 | { | |
461 | return __sessiond_set_thread_pollset(events, size, thread_quit_pipe); | |
462 | } | |
463 | ||
273ea72c | 464 | /* |
5eb91c98 | 465 | * Init thread quit pipe. |
273ea72c DG |
466 | * |
467 | * Return -1 on error or 0 if all pipes are created. | |
468 | */ | |
4a15001e | 469 | static int __init_thread_quit_pipe(int *a_pipe) |
273ea72c | 470 | { |
730389d9 | 471 | int ret, i; |
273ea72c | 472 | |
4a15001e | 473 | ret = pipe(a_pipe); |
273ea72c | 474 | if (ret < 0) { |
730389d9 | 475 | PERROR("thread quit pipe"); |
273ea72c DG |
476 | goto error; |
477 | } | |
478 | ||
730389d9 | 479 | for (i = 0; i < 2; i++) { |
4a15001e | 480 | ret = fcntl(a_pipe[i], F_SETFD, FD_CLOEXEC); |
730389d9 DG |
481 | if (ret < 0) { |
482 | PERROR("fcntl"); | |
483 | goto error; | |
484 | } | |
485 | } | |
486 | ||
273ea72c DG |
487 | error: |
488 | return ret; | |
489 | } | |
490 | ||
4a15001e MD |
491 | static int init_thread_quit_pipe(void) |
492 | { | |
493 | return __init_thread_quit_pipe(thread_quit_pipe); | |
494 | } | |
495 | ||
099e26bd DG |
496 | /* |
497 | * Stop all threads by closing the thread quit pipe. | |
498 | */ | |
cf3af59e MD |
499 | static void stop_threads(void) |
500 | { | |
5eb91c98 DG |
501 | int ret; |
502 | ||
cf3af59e MD |
503 | /* Stopping all threads */ |
504 | DBG("Terminating all threads"); | |
54d01ffb | 505 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
506 | if (ret < 0) { |
507 | ERR("write error on thread quit pipe"); | |
508 | } | |
509 | ||
099e26bd | 510 | /* Dispatch thread */ |
26c9d55e | 511 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 512 | futex_nto1_wake(&ust_cmd_queue.futex); |
55c2a7f9 JD |
513 | |
514 | /* timer thread */ | |
515 | kill(getpid(), LTTNG_SESSIOND_SIG_EXIT); | |
cf3af59e MD |
516 | } |
517 | ||
e975f9f8 DG |
518 | /* |
519 | * Close every consumer sockets. | |
520 | */ | |
521 | static void close_consumer_sockets(void) | |
522 | { | |
523 | int ret; | |
524 | ||
525 | if (kconsumer_data.err_sock >= 0) { | |
526 | ret = close(kconsumer_data.err_sock); | |
527 | if (ret < 0) { | |
528 | PERROR("kernel consumer err_sock close"); | |
529 | } | |
530 | } | |
531 | if (ustconsumer32_data.err_sock >= 0) { | |
532 | ret = close(ustconsumer32_data.err_sock); | |
533 | if (ret < 0) { | |
a76cbd9f | 534 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
535 | } |
536 | } | |
537 | if (ustconsumer64_data.err_sock >= 0) { | |
538 | ret = close(ustconsumer64_data.err_sock); | |
539 | if (ret < 0) { | |
a76cbd9f | 540 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
541 | } |
542 | } | |
543 | if (kconsumer_data.cmd_sock >= 0) { | |
544 | ret = close(kconsumer_data.cmd_sock); | |
545 | if (ret < 0) { | |
546 | PERROR("kernel consumer cmd_sock close"); | |
547 | } | |
548 | } | |
549 | if (ustconsumer32_data.cmd_sock >= 0) { | |
550 | ret = close(ustconsumer32_data.cmd_sock); | |
551 | if (ret < 0) { | |
a76cbd9f | 552 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
553 | } |
554 | } | |
555 | if (ustconsumer64_data.cmd_sock >= 0) { | |
556 | ret = close(ustconsumer64_data.cmd_sock); | |
557 | if (ret < 0) { | |
a76cbd9f | 558 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
559 | } |
560 | } | |
b3530820 JG |
561 | if (kconsumer_data.channel_monitor_pipe >= 0) { |
562 | ret = close(kconsumer_data.channel_monitor_pipe); | |
563 | if (ret < 0) { | |
564 | PERROR("kernel consumer channel monitor pipe close"); | |
565 | } | |
566 | } | |
567 | if (ustconsumer32_data.channel_monitor_pipe >= 0) { | |
568 | ret = close(ustconsumer32_data.channel_monitor_pipe); | |
569 | if (ret < 0) { | |
570 | PERROR("UST consumerd32 channel monitor pipe close"); | |
571 | } | |
572 | } | |
573 | if (ustconsumer64_data.channel_monitor_pipe >= 0) { | |
574 | ret = close(ustconsumer64_data.channel_monitor_pipe); | |
575 | if (ret < 0) { | |
576 | PERROR("UST consumerd64 channel monitor pipe close"); | |
577 | } | |
578 | } | |
6e0be6cc JD |
579 | if (kconsumer_data.channel_rotate_pipe >= 0) { |
580 | ret = close(kconsumer_data.channel_rotate_pipe); | |
581 | if (ret < 0) { | |
582 | PERROR("kernel consumer channel rotate pipe close"); | |
583 | } | |
584 | } | |
585 | if (ustconsumer32_data.channel_rotate_pipe >= 0) { | |
586 | ret = close(ustconsumer32_data.channel_rotate_pipe); | |
587 | if (ret < 0) { | |
588 | PERROR("UST consumerd32 channel rotate pipe close"); | |
589 | } | |
590 | } | |
591 | if (ustconsumer64_data.channel_rotate_pipe >= 0) { | |
592 | ret = close(ustconsumer64_data.channel_rotate_pipe); | |
593 | if (ret < 0) { | |
594 | PERROR("UST consumerd64 channel rotate pipe close"); | |
595 | } | |
596 | } | |
e975f9f8 DG |
597 | } |
598 | ||
c9cb3e7d JG |
599 | /* |
600 | * Generate the full lock file path using the rundir. | |
601 | * | |
602 | * Return the snprintf() return value thus a negative value is an error. | |
603 | */ | |
604 | static int generate_lock_file_path(char *path, size_t len) | |
605 | { | |
606 | int ret; | |
607 | ||
608 | assert(path); | |
609 | assert(rundir); | |
610 | ||
611 | /* Build lockfile path from rundir. */ | |
612 | ret = snprintf(path, len, "%s/" DEFAULT_LTTNG_SESSIOND_LOCKFILE, rundir); | |
613 | if (ret < 0) { | |
614 | PERROR("snprintf lockfile path"); | |
615 | } | |
616 | ||
617 | return ret; | |
618 | } | |
619 | ||
4e4714cb JR |
620 | /* |
621 | * Wait on consumer process termination. | |
622 | * | |
623 | * Need to be called with the consumer data lock held or from a context | |
624 | * ensuring no concurrent access to data (e.g: cleanup). | |
625 | */ | |
626 | static void wait_consumer(struct consumer_data *consumer_data) | |
627 | { | |
628 | pid_t ret; | |
629 | int status; | |
630 | ||
631 | if (consumer_data->pid <= 0) { | |
632 | return; | |
633 | } | |
634 | ||
635 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
636 | consumer_data->pid); | |
637 | ret = waitpid(consumer_data->pid, &status, 0); | |
638 | if (ret == -1) { | |
639 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
1640c24c | 640 | } else if (!WIFEXITED(status)) { |
4e4714cb JR |
641 | ERR("consumerd termination with error: %d", |
642 | WEXITSTATUS(ret)); | |
643 | } | |
644 | consumer_data->pid = 0; | |
645 | } | |
646 | ||
fac6795d | 647 | /* |
4a15001e | 648 | * Cleanup the session daemon's data structures. |
fac6795d | 649 | */ |
4a15001e | 650 | static void sessiond_cleanup(void) |
fac6795d | 651 | { |
ef599319 | 652 | int ret; |
af9737e9 | 653 | struct ltt_session *sess, *stmp; |
8c6c56c2 | 654 | char path[PATH_MAX]; |
fac6795d | 655 | |
4a15001e | 656 | DBG("Cleanup sessiond"); |
e07ae692 | 657 | |
4e449f3f MD |
658 | /* |
659 | * Close the thread quit pipe. It has already done its job, | |
660 | * since we are now called. | |
661 | */ | |
2f77fc4b DG |
662 | utils_close_pipe(thread_quit_pipe); |
663 | ||
35f90c40 DG |
664 | /* |
665 | * If opt_pidfile is undefined, the default file will be wiped when | |
666 | * removing the rundir. | |
667 | */ | |
668 | if (opt_pidfile) { | |
669 | ret = remove(opt_pidfile); | |
670 | if (ret < 0) { | |
671 | PERROR("remove pidfile %s", opt_pidfile); | |
672 | } | |
673 | } | |
674 | ||
8c6c56c2 MD |
675 | DBG("Removing sessiond and consumerd content of directory %s", rundir); |
676 | ||
677 | /* sessiond */ | |
678 | snprintf(path, PATH_MAX, | |
679 | "%s/%s", | |
680 | rundir, DEFAULT_LTTNG_SESSIOND_PIDFILE); | |
681 | DBG("Removing %s", path); | |
682 | (void) unlink(path); | |
683 | ||
cd9290dd | 684 | snprintf(path, PATH_MAX, "%s/%s", rundir, |
022d91ba | 685 | DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE); |
cd9290dd DG |
686 | DBG("Removing %s", path); |
687 | (void) unlink(path); | |
688 | ||
8c6c56c2 MD |
689 | /* kconsumerd */ |
690 | snprintf(path, PATH_MAX, | |
691 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, | |
692 | rundir); | |
693 | DBG("Removing %s", path); | |
694 | (void) unlink(path); | |
695 | ||
696 | snprintf(path, PATH_MAX, | |
697 | DEFAULT_KCONSUMERD_PATH, | |
698 | rundir); | |
699 | DBG("Removing directory %s", path); | |
700 | (void) rmdir(path); | |
701 | ||
702 | /* ust consumerd 32 */ | |
703 | snprintf(path, PATH_MAX, | |
704 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, | |
705 | rundir); | |
706 | DBG("Removing %s", path); | |
707 | (void) unlink(path); | |
708 | ||
709 | snprintf(path, PATH_MAX, | |
710 | DEFAULT_USTCONSUMERD32_PATH, | |
711 | rundir); | |
712 | DBG("Removing directory %s", path); | |
713 | (void) rmdir(path); | |
714 | ||
715 | /* ust consumerd 64 */ | |
716 | snprintf(path, PATH_MAX, | |
717 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, | |
718 | rundir); | |
719 | DBG("Removing %s", path); | |
720 | (void) unlink(path); | |
721 | ||
722 | snprintf(path, PATH_MAX, | |
723 | DEFAULT_USTCONSUMERD64_PATH, | |
724 | rundir); | |
725 | DBG("Removing directory %s", path); | |
726 | (void) rmdir(path); | |
5461b305 | 727 | |
99bab54f | 728 | DBG("Cleaning up all sessions"); |
fac6795d | 729 | |
b5541356 | 730 | /* Destroy session list mutex */ |
273ea72c DG |
731 | if (session_list_ptr != NULL) { |
732 | pthread_mutex_destroy(&session_list_ptr->lock); | |
733 | ||
734 | /* Cleanup ALL session */ | |
54d01ffb DG |
735 | cds_list_for_each_entry_safe(sess, stmp, |
736 | &session_list_ptr->head, list) { | |
2f77fc4b | 737 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
738 | } |
739 | } | |
740 | ||
4e4714cb JR |
741 | wait_consumer(&kconsumer_data); |
742 | wait_consumer(&ustconsumer64_data); | |
743 | wait_consumer(&ustconsumer32_data); | |
744 | ||
6a4e4039 JG |
745 | DBG("Cleaning up all agent apps"); |
746 | agent_app_ht_clean(); | |
747 | ||
099e26bd | 748 | DBG("Closing all UST sockets"); |
56fff090 | 749 | ust_app_clean_list(); |
7972aab2 | 750 | buffer_reg_destroy_registries(); |
099e26bd | 751 | |
4fba7219 DG |
752 | if (is_root && !opt_no_kernel) { |
753 | DBG2("Closing kernel fd"); | |
a4b35e07 | 754 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
755 | ret = close(kernel_tracer_fd); |
756 | if (ret) { | |
757 | PERROR("close"); | |
758 | } | |
a4b35e07 | 759 | } |
2f50c8a3 | 760 | DBG("Unloading kernel modules"); |
096102bd | 761 | modprobe_remove_lttng_all(); |
834978fd | 762 | free(syscall_table); |
2f50c8a3 | 763 | } |
2f77fc4b | 764 | |
e975f9f8 DG |
765 | close_consumer_sockets(); |
766 | ||
ef367a93 JG |
767 | if (load_info) { |
768 | load_session_destroy_data(load_info); | |
769 | free(load_info); | |
770 | } | |
771 | ||
c9cb3e7d JG |
772 | /* |
773 | * Cleanup lock file by deleting it and finaly closing it which will | |
774 | * release the file system lock. | |
775 | */ | |
776 | if (lockfile_fd >= 0) { | |
777 | char lockfile_path[PATH_MAX]; | |
778 | ||
4a15001e MD |
779 | ret = generate_lock_file_path(lockfile_path, |
780 | sizeof(lockfile_path)); | |
c9cb3e7d JG |
781 | if (ret > 0) { |
782 | ret = remove(lockfile_path); | |
783 | if (ret < 0) { | |
784 | PERROR("remove lock file"); | |
785 | } | |
786 | ret = close(lockfile_fd); | |
787 | if (ret < 0) { | |
788 | PERROR("close lock file"); | |
789 | } | |
790 | } | |
791 | } | |
792 | ||
793 | /* | |
794 | * We do NOT rmdir rundir because there are other processes | |
795 | * using it, for instance lttng-relayd, which can start in | |
796 | * parallel with this teardown. | |
797 | */ | |
798 | ||
799 | free(rundir); | |
4a15001e MD |
800 | } |
801 | ||
802 | /* | |
803 | * Cleanup the daemon's option data structures. | |
804 | */ | |
805 | static void sessiond_cleanup_options(void) | |
806 | { | |
807 | DBG("Cleaning up options"); | |
808 | ||
809 | /* | |
810 | * If the override option is set, the pointer points to a *non* const | |
811 | * thus freeing it even though the variable type is set to const. | |
812 | */ | |
813 | if (tracing_group_name_override) { | |
814 | free((void *) tracing_group_name); | |
815 | } | |
816 | if (consumerd32_bin_override) { | |
817 | free((void *) consumerd32_bin); | |
818 | } | |
819 | if (consumerd64_bin_override) { | |
820 | free((void *) consumerd64_bin); | |
821 | } | |
822 | if (consumerd32_libdir_override) { | |
823 | free((void *) consumerd32_libdir); | |
824 | } | |
825 | if (consumerd64_libdir_override) { | |
826 | free((void *) consumerd64_libdir); | |
827 | } | |
828 | ||
829 | free(opt_pidfile); | |
830 | free(opt_load_session_path); | |
831 | free(kmod_probes_list); | |
832 | free(kmod_extra_probes_list); | |
c9cb3e7d | 833 | |
7567352f | 834 | run_as_destroy_worker(); |
fac6795d DG |
835 | } |
836 | ||
e065084a | 837 | /* |
d063d709 | 838 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 839 | * |
d063d709 | 840 | * Return lttcomm error code. |
e065084a DG |
841 | */ |
842 | static int send_unix_sock(int sock, void *buf, size_t len) | |
843 | { | |
844 | /* Check valid length */ | |
c617c0c6 | 845 | if (len == 0) { |
e065084a DG |
846 | return -1; |
847 | } | |
848 | ||
849 | return lttcomm_send_unix_sock(sock, buf, len); | |
850 | } | |
851 | ||
5461b305 | 852 | /* |
d063d709 | 853 | * Free memory of a command context structure. |
5461b305 | 854 | */ |
a2fb29a5 | 855 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 856 | { |
a2fb29a5 DG |
857 | DBG("Clean command context structure"); |
858 | if (*cmd_ctx) { | |
859 | if ((*cmd_ctx)->llm) { | |
860 | free((*cmd_ctx)->llm); | |
5461b305 | 861 | } |
a2fb29a5 DG |
862 | if ((*cmd_ctx)->lsm) { |
863 | free((*cmd_ctx)->lsm); | |
5461b305 | 864 | } |
a2fb29a5 DG |
865 | free(*cmd_ctx); |
866 | *cmd_ctx = NULL; | |
5461b305 DG |
867 | } |
868 | } | |
869 | ||
fac6795d | 870 | /* |
0fdd1e2c | 871 | * Notify UST applications using the shm mmap futex. |
fac6795d | 872 | */ |
0fdd1e2c | 873 | static int notify_ust_apps(int active) |
fac6795d | 874 | { |
0fdd1e2c | 875 | char *wait_shm_mmap; |
fac6795d | 876 | |
0fdd1e2c | 877 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 878 | |
0fdd1e2c DG |
879 | /* See shm.c for this call implying mmap, shm and futex calls */ |
880 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
881 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
882 | goto error; |
883 | } | |
884 | ||
0fdd1e2c DG |
885 | /* Wake waiting process */ |
886 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
887 | ||
888 | /* Apps notified successfully */ | |
889 | return 0; | |
fac6795d DG |
890 | |
891 | error: | |
0fdd1e2c | 892 | return -1; |
fac6795d DG |
893 | } |
894 | ||
e065084a | 895 | /* |
d063d709 DG |
896 | * Setup the outgoing data buffer for the response (llm) by allocating the |
897 | * right amount of memory and copying the original information from the lsm | |
898 | * structure. | |
ca95a216 | 899 | * |
6e10c9b9 | 900 | * Return 0 on success, negative value on error. |
ca95a216 | 901 | */ |
6e10c9b9 PP |
902 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, |
903 | const void *payload_buf, size_t payload_len, | |
904 | const void *cmd_header_buf, size_t cmd_header_len) | |
ca95a216 | 905 | { |
6e10c9b9 PP |
906 | int ret = 0; |
907 | const size_t header_len = sizeof(struct lttcomm_lttng_msg); | |
908 | const size_t cmd_header_offset = header_len; | |
909 | const size_t payload_offset = cmd_header_offset + cmd_header_len; | |
910 | const size_t total_msg_size = header_len + cmd_header_len + payload_len; | |
ca95a216 | 911 | |
6e10c9b9 | 912 | cmd_ctx->llm = zmalloc(total_msg_size); |
5461b305 | 913 | |
5461b305 | 914 | if (cmd_ctx->llm == NULL) { |
76d7553f | 915 | PERROR("zmalloc"); |
5461b305 | 916 | ret = -ENOMEM; |
6e10c9b9 | 917 | goto end; |
ca95a216 DG |
918 | } |
919 | ||
5461b305 DG |
920 | /* Copy common data */ |
921 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 922 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
6e10c9b9 PP |
923 | cmd_ctx->llm->cmd_header_size = cmd_header_len; |
924 | cmd_ctx->llm->data_size = payload_len; | |
925 | cmd_ctx->lttng_msg_size = total_msg_size; | |
5461b305 | 926 | |
6e10c9b9 | 927 | /* Copy command header */ |
b4e3ceb9 PP |
928 | if (cmd_header_len) { |
929 | memcpy(((uint8_t *) cmd_ctx->llm) + cmd_header_offset, cmd_header_buf, | |
930 | cmd_header_len); | |
931 | } | |
5461b305 | 932 | |
6e10c9b9 | 933 | /* Copy payload */ |
b4e3ceb9 PP |
934 | if (payload_len) { |
935 | memcpy(((uint8_t *) cmd_ctx->llm) + payload_offset, payload_buf, | |
936 | payload_len); | |
937 | } | |
ca95a216 | 938 | |
6e10c9b9 | 939 | end: |
ca95a216 DG |
940 | return ret; |
941 | } | |
942 | ||
6e10c9b9 PP |
943 | /* |
944 | * Version of setup_lttng_msg() without command header. | |
945 | */ | |
946 | static int setup_lttng_msg_no_cmd_header(struct command_ctx *cmd_ctx, | |
947 | void *payload_buf, size_t payload_len) | |
948 | { | |
949 | return setup_lttng_msg(cmd_ctx, payload_buf, payload_len, NULL, 0); | |
950 | } | |
7a485870 | 951 | /* |
5eb91c98 | 952 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 953 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 954 | */ |
5eb91c98 | 955 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 956 | { |
5eb91c98 | 957 | int ret; |
7a485870 DG |
958 | struct ltt_session *session; |
959 | struct ltt_kernel_channel *channel; | |
960 | ||
5eb91c98 | 961 | DBG("Updating kernel poll set"); |
7a485870 | 962 | |
54d01ffb | 963 | session_lock_list(); |
b5541356 | 964 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 965 | session_lock(session); |
7a485870 | 966 | if (session->kernel_session == NULL) { |
54d01ffb | 967 | session_unlock(session); |
7a485870 DG |
968 | continue; |
969 | } | |
7a485870 | 970 | |
54d01ffb DG |
971 | cds_list_for_each_entry(channel, |
972 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
973 | /* Add channel fd to the kernel poll set */ |
974 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
975 | if (ret < 0) { | |
54d01ffb | 976 | session_unlock(session); |
5eb91c98 DG |
977 | goto error; |
978 | } | |
979 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 980 | } |
54d01ffb | 981 | session_unlock(session); |
7a485870 | 982 | } |
54d01ffb | 983 | session_unlock_list(); |
7a485870 | 984 | |
5eb91c98 | 985 | return 0; |
7a485870 DG |
986 | |
987 | error: | |
54d01ffb | 988 | session_unlock_list(); |
7a485870 DG |
989 | return -1; |
990 | } | |
991 | ||
992 | /* | |
54d01ffb | 993 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 994 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 995 | * |
d063d709 | 996 | * Useful for CPU hotplug feature. |
7a485870 | 997 | */ |
2bdd86d4 | 998 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
999 | { |
1000 | int ret = 0; | |
1001 | struct ltt_session *session; | |
173af62f | 1002 | struct ltt_kernel_session *ksess; |
7a485870 DG |
1003 | struct ltt_kernel_channel *channel; |
1004 | ||
1005 | DBG("Updating kernel streams for channel fd %d", fd); | |
1006 | ||
54d01ffb | 1007 | session_lock_list(); |
b5541356 | 1008 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 1009 | session_lock(session); |
7a485870 | 1010 | if (session->kernel_session == NULL) { |
54d01ffb | 1011 | session_unlock(session); |
7a485870 DG |
1012 | continue; |
1013 | } | |
173af62f | 1014 | ksess = session->kernel_session; |
d9800920 | 1015 | |
4a15001e MD |
1016 | cds_list_for_each_entry(channel, |
1017 | &ksess->channel_list.head, list) { | |
1018 | struct lttng_ht_iter iter; | |
1019 | struct consumer_socket *socket; | |
d9800920 | 1020 | |
4a15001e MD |
1021 | if (channel->fd != fd) { |
1022 | continue; | |
1023 | } | |
1024 | DBG("Channel found, updating kernel streams"); | |
1025 | ret = kernel_open_channel_stream(channel); | |
1026 | if (ret < 0) { | |
1027 | goto error; | |
1028 | } | |
1029 | /* Update the stream global counter */ | |
1030 | ksess->stream_count_global += ret; | |
1031 | ||
1032 | /* | |
1033 | * Have we already sent fds to the consumer? If yes, it | |
1034 | * means that tracing is started so it is safe to send | |
1035 | * our updated stream fds. | |
1036 | */ | |
1037 | if (ksess->consumer_fds_sent != 1 | |
1038 | || ksess->consumer == NULL) { | |
1039 | ret = -1; | |
1040 | goto error; | |
1041 | } | |
1042 | ||
1043 | rcu_read_lock(); | |
1044 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
1045 | &iter.iter, socket, node.node) { | |
1046 | pthread_mutex_lock(socket->lock); | |
1047 | ret = kernel_consumer_send_channel_stream(socket, | |
1048 | channel, ksess, | |
1049 | session->output_traces ? 1 : 0); | |
1050 | pthread_mutex_unlock(socket->lock); | |
1051 | if (ret < 0) { | |
e7fe706f | 1052 | rcu_read_unlock(); |
4a15001e | 1053 | goto error; |
7a485870 | 1054 | } |
7a485870 | 1055 | } |
4a15001e | 1056 | rcu_read_unlock(); |
7a485870 | 1057 | } |
54d01ffb | 1058 | session_unlock(session); |
7a485870 | 1059 | } |
54d01ffb | 1060 | session_unlock_list(); |
b3c750d2 | 1061 | return ret; |
7a485870 | 1062 | |
b3c750d2 | 1063 | error: |
54d01ffb DG |
1064 | session_unlock(session); |
1065 | session_unlock_list(); | |
7a485870 DG |
1066 | return ret; |
1067 | } | |
1068 | ||
487cf67c | 1069 | /* |
ffe60014 DG |
1070 | * For each tracing session, update newly registered apps. The session list |
1071 | * lock MUST be acquired before calling this. | |
487cf67c DG |
1072 | */ |
1073 | static void update_ust_app(int app_sock) | |
1074 | { | |
1075 | struct ltt_session *sess, *stmp; | |
1076 | ||
fdadac08 DG |
1077 | /* Consumer is in an ERROR state. Stop any application update. */ |
1078 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
1079 | /* Stop the update process since the consumer is dead. */ | |
1080 | return; | |
1081 | } | |
1082 | ||
487cf67c DG |
1083 | /* For all tracing session(s) */ |
1084 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
a9ad0c8f MD |
1085 | struct ust_app *app; |
1086 | ||
4ee14516 | 1087 | session_lock(sess); |
a9ad0c8f MD |
1088 | if (!sess->ust_session) { |
1089 | goto unlock_session; | |
1090 | } | |
1091 | ||
1092 | rcu_read_lock(); | |
1093 | assert(app_sock >= 0); | |
1094 | app = ust_app_find_by_sock(app_sock); | |
1095 | if (app == NULL) { | |
1096 | /* | |
1097 | * Application can be unregistered before so | |
1098 | * this is possible hence simply stopping the | |
1099 | * update. | |
1100 | */ | |
1101 | DBG3("UST app update failed to find app sock %d", | |
1102 | app_sock); | |
1103 | goto unlock_rcu; | |
421cb601 | 1104 | } |
a9ad0c8f MD |
1105 | ust_app_global_update(sess->ust_session, app); |
1106 | unlock_rcu: | |
1107 | rcu_read_unlock(); | |
1108 | unlock_session: | |
4ee14516 | 1109 | session_unlock(sess); |
487cf67c DG |
1110 | } |
1111 | } | |
1112 | ||
7a485870 | 1113 | /* |
d063d709 | 1114 | * This thread manage event coming from the kernel. |
7a485870 | 1115 | * |
d063d709 DG |
1116 | * Features supported in this thread: |
1117 | * -) CPU Hotplug | |
7a485870 DG |
1118 | */ |
1119 | static void *thread_manage_kernel(void *data) | |
1120 | { | |
139ac872 | 1121 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 1122 | uint32_t revents, nb_fd; |
7a485870 | 1123 | char tmp; |
5eb91c98 | 1124 | struct lttng_poll_event events; |
7a485870 | 1125 | |
6993eeb3 | 1126 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 1127 | |
6c71277b | 1128 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 1129 | |
d5d63bf1 DG |
1130 | /* |
1131 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 1132 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 1133 | */ |
6d737ce4 | 1134 | lttng_poll_init(&events); |
d5d63bf1 | 1135 | |
e547b070 | 1136 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
1137 | goto error_testpoint; |
1138 | } | |
8ac94142 | 1139 | |
840cb59c | 1140 | health_code_update(); |
44a5e5eb | 1141 | |
e547b070 | 1142 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 1143 | goto error_testpoint; |
6993eeb3 CB |
1144 | } |
1145 | ||
7a485870 | 1146 | while (1) { |
840cb59c | 1147 | health_code_update(); |
44a5e5eb | 1148 | |
7a485870 | 1149 | if (update_poll_flag == 1) { |
d21b0d71 DG |
1150 | /* Clean events object. We are about to populate it again. */ |
1151 | lttng_poll_clean(&events); | |
1152 | ||
d0b96690 | 1153 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
1154 | if (ret < 0) { |
1155 | goto error_poll_create; | |
1156 | } | |
1157 | ||
1158 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
1159 | if (ret < 0) { | |
1160 | goto error; | |
1161 | } | |
5f822d0a | 1162 | |
d21b0d71 | 1163 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
1164 | ret = update_kernel_poll(&events); |
1165 | if (ret < 0) { | |
7a485870 DG |
1166 | goto error; |
1167 | } | |
1168 | update_poll_flag = 0; | |
1169 | } | |
1170 | ||
7fa2082e | 1171 | DBG("Thread kernel polling"); |
7a485870 DG |
1172 | |
1173 | /* Poll infinite value of time */ | |
88f2b785 | 1174 | restart: |
a78af745 | 1175 | health_poll_entry(); |
5eb91c98 | 1176 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1177 | DBG("Thread kernel return from poll on %d fds", |
1178 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1179 | health_poll_exit(); |
7a485870 | 1180 | if (ret < 0) { |
88f2b785 MD |
1181 | /* |
1182 | * Restart interrupted system call. | |
1183 | */ | |
1184 | if (errno == EINTR) { | |
1185 | goto restart; | |
1186 | } | |
7a485870 DG |
1187 | goto error; |
1188 | } else if (ret == 0) { | |
1189 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
1190 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
1191 | "This should not have happened! Continuing..."); | |
7a485870 DG |
1192 | continue; |
1193 | } | |
1194 | ||
0d9c5d77 DG |
1195 | nb_fd = ret; |
1196 | ||
5eb91c98 DG |
1197 | for (i = 0; i < nb_fd; i++) { |
1198 | /* Fetch once the poll data */ | |
1199 | revents = LTTNG_POLL_GETEV(&events, i); | |
1200 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 1201 | |
840cb59c | 1202 | health_code_update(); |
44a5e5eb | 1203 | |
fd20dac9 MD |
1204 | if (!revents) { |
1205 | /* No activity for this FD (poll implementation). */ | |
1206 | continue; | |
1207 | } | |
1208 | ||
5eb91c98 | 1209 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1210 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1211 | if (ret) { |
139ac872 MD |
1212 | err = 0; |
1213 | goto exit; | |
5eb91c98 | 1214 | } |
7a485870 | 1215 | |
5eb91c98 | 1216 | /* Check for data on kernel pipe */ |
03e43155 MD |
1217 | if (revents & LPOLLIN) { |
1218 | if (pollfd == kernel_poll_pipe[0]) { | |
1219 | (void) lttng_read(kernel_poll_pipe[0], | |
1220 | &tmp, 1); | |
1221 | /* | |
1222 | * Ret value is useless here, if this pipe gets any actions an | |
1223 | * update is required anyway. | |
1224 | */ | |
1225 | update_poll_flag = 1; | |
1226 | continue; | |
1227 | } else { | |
1228 | /* | |
1229 | * New CPU detected by the kernel. Adding kernel stream to | |
1230 | * kernel session and updating the kernel consumer | |
1231 | */ | |
2bdd86d4 | 1232 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
1233 | if (ret < 0) { |
1234 | continue; | |
1235 | } | |
1236 | break; | |
7a485870 | 1237 | } |
03e43155 MD |
1238 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1239 | update_poll_flag = 1; | |
1240 | continue; | |
1241 | } else { | |
1242 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1243 | goto error; | |
7a485870 DG |
1244 | } |
1245 | } | |
1246 | } | |
1247 | ||
139ac872 | 1248 | exit: |
7a485870 | 1249 | error: |
5eb91c98 | 1250 | lttng_poll_clean(&events); |
76d7553f | 1251 | error_poll_create: |
6993eeb3 | 1252 | error_testpoint: |
6620da75 DG |
1253 | utils_close_pipe(kernel_poll_pipe); |
1254 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 1255 | if (err) { |
840cb59c | 1256 | health_error(); |
139ac872 | 1257 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
1258 | WARN("Kernel thread died unexpectedly. " |
1259 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 1260 | } |
8782cc74 | 1261 | health_unregister(health_sessiond); |
76d7553f | 1262 | DBG("Kernel thread dying"); |
7a485870 DG |
1263 | return NULL; |
1264 | } | |
1265 | ||
a23ec3a7 DG |
1266 | /* |
1267 | * Signal pthread condition of the consumer data that the thread. | |
1268 | */ | |
1269 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
1270 | { | |
1271 | pthread_mutex_lock(&data->cond_mutex); | |
1272 | ||
1273 | /* | |
1274 | * The state is set before signaling. It can be any value, it's the waiter | |
1275 | * job to correctly interpret this condition variable associated to the | |
1276 | * consumer pthread_cond. | |
1277 | * | |
1278 | * A value of 0 means that the corresponding thread of the consumer data | |
1279 | * was not started. 1 indicates that the thread has started and is ready | |
1280 | * for action. A negative value means that there was an error during the | |
1281 | * thread bootstrap. | |
1282 | */ | |
1283 | data->consumer_thread_is_ready = state; | |
1284 | (void) pthread_cond_signal(&data->cond); | |
1285 | ||
1286 | pthread_mutex_unlock(&data->cond_mutex); | |
1287 | } | |
1288 | ||
1d4b027a | 1289 | /* |
3bd1e081 | 1290 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1291 | */ |
3bd1e081 | 1292 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1293 | { |
42fc1d0b | 1294 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 1295 | uint32_t revents, nb_fd; |
1d4b027a | 1296 | enum lttcomm_return_code code; |
5eb91c98 | 1297 | struct lttng_poll_event events; |
3bd1e081 | 1298 | struct consumer_data *consumer_data = data; |
b3530820 | 1299 | struct consumer_socket *cmd_socket_wrapper = NULL; |
1d4b027a | 1300 | |
3bd1e081 | 1301 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1302 | |
34c1e15a MD |
1303 | rcu_register_thread(); |
1304 | rcu_thread_online(); | |
1305 | ||
6c71277b | 1306 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1307 | |
855060f8 | 1308 | health_code_update(); |
9449cc75 | 1309 | |
5eb91c98 | 1310 | /* |
331744e3 JD |
1311 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1312 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1313 | */ |
331744e3 | 1314 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1315 | if (ret < 0) { |
76d7553f | 1316 | goto error_poll; |
5eb91c98 | 1317 | } |
273ea72c | 1318 | |
edb8b045 DG |
1319 | /* |
1320 | * The error socket here is already in a listening state which was done | |
1321 | * just before spawning this thread to avoid a race between the consumer | |
1322 | * daemon exec trying to connect and the listen() call. | |
1323 | */ | |
3bd1e081 | 1324 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1325 | if (ret < 0) { |
1326 | goto error; | |
1327 | } | |
1328 | ||
840cb59c | 1329 | health_code_update(); |
44a5e5eb | 1330 | |
331744e3 | 1331 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1332 | restart: |
a78af745 | 1333 | health_poll_entry(); |
8ac94142 | 1334 | |
e547b070 | 1335 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
1336 | goto error; |
1337 | } | |
8ac94142 | 1338 | |
5eb91c98 | 1339 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1340 | health_poll_exit(); |
273ea72c | 1341 | if (ret < 0) { |
88f2b785 MD |
1342 | /* |
1343 | * Restart interrupted system call. | |
1344 | */ | |
1345 | if (errno == EINTR) { | |
1346 | goto restart; | |
1347 | } | |
273ea72c DG |
1348 | goto error; |
1349 | } | |
1350 | ||
0d9c5d77 DG |
1351 | nb_fd = ret; |
1352 | ||
5eb91c98 DG |
1353 | for (i = 0; i < nb_fd; i++) { |
1354 | /* Fetch once the poll data */ | |
1355 | revents = LTTNG_POLL_GETEV(&events, i); | |
1356 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1357 | ||
840cb59c | 1358 | health_code_update(); |
44a5e5eb | 1359 | |
fd20dac9 MD |
1360 | if (!revents) { |
1361 | /* No activity for this FD (poll implementation). */ | |
1362 | continue; | |
1363 | } | |
1364 | ||
5eb91c98 | 1365 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1366 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1367 | if (ret) { |
139ac872 MD |
1368 | err = 0; |
1369 | goto exit; | |
5eb91c98 DG |
1370 | } |
1371 | ||
1372 | /* Event on the registration socket */ | |
3bd1e081 | 1373 | if (pollfd == consumer_data->err_sock) { |
03e43155 MD |
1374 | if (revents & LPOLLIN) { |
1375 | continue; | |
1376 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1377 | ERR("consumer err socket poll error"); |
5eb91c98 | 1378 | goto error; |
03e43155 MD |
1379 | } else { |
1380 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1381 | goto error; | |
5eb91c98 DG |
1382 | } |
1383 | } | |
273ea72c DG |
1384 | } |
1385 | ||
3bd1e081 | 1386 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1387 | if (sock < 0) { |
1388 | goto error; | |
1389 | } | |
1390 | ||
b662582b DG |
1391 | /* |
1392 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1393 | * show must go on. | |
1394 | */ | |
1395 | (void) utils_set_fd_cloexec(sock); | |
1396 | ||
840cb59c | 1397 | health_code_update(); |
44a5e5eb | 1398 | |
3bd1e081 | 1399 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1400 | |
712ea556 | 1401 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1402 | ret = lttcomm_recv_unix_sock(sock, &code, |
1403 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1404 | if (ret <= 0) { |
1405 | goto error; | |
1406 | } | |
1407 | ||
840cb59c | 1408 | health_code_update(); |
b3530820 | 1409 | if (code != LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
3bd1e081 | 1410 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1411 | lttcomm_get_readable_code(-code)); |
1412 | goto error; | |
1413 | } | |
1414 | ||
b3530820 JG |
1415 | /* Connect both command and metadata sockets. */ |
1416 | consumer_data->cmd_sock = | |
1417 | lttcomm_connect_unix_sock( | |
1418 | consumer_data->cmd_unix_sock_path); | |
1419 | consumer_data->metadata_fd = | |
1420 | lttcomm_connect_unix_sock( | |
1421 | consumer_data->cmd_unix_sock_path); | |
1422 | if (consumer_data->cmd_sock < 0 || consumer_data->metadata_fd < 0) { | |
1423 | PERROR("consumer connect cmd socket"); | |
1424 | /* On error, signal condition and quit. */ | |
1425 | signal_consumer_condition(consumer_data, -1); | |
1426 | goto error; | |
1427 | } | |
1428 | ||
1429 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; | |
1430 | ||
1431 | /* Create metadata socket lock. */ | |
1432 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1433 | if (consumer_data->metadata_sock.lock == NULL) { | |
1434 | PERROR("zmalloc pthread mutex"); | |
1435 | goto error; | |
1436 | } | |
1437 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1438 | ||
1439 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); | |
1440 | DBG("Consumer metadata socket ready (fd: %d)", | |
1441 | consumer_data->metadata_fd); | |
1442 | ||
1443 | /* | |
1444 | * Remove the consumerd error sock since we've established a connection. | |
1445 | */ | |
3bd1e081 | 1446 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1447 | if (ret < 0) { |
72079cae DG |
1448 | goto error; |
1449 | } | |
1450 | ||
331744e3 | 1451 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1452 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1453 | if (ret < 0) { | |
72079cae | 1454 | goto error; |
5eb91c98 DG |
1455 | } |
1456 | ||
331744e3 | 1457 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1458 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1459 | LPOLLIN | LPOLLRDHUP); |
1460 | if (ret < 0) { | |
1461 | goto error; | |
1462 | } | |
1463 | ||
840cb59c | 1464 | health_code_update(); |
44a5e5eb | 1465 | |
b3530820 | 1466 | /* |
6e0be6cc JD |
1467 | * Transfer the write-end of the channel monitoring and rotate pipe |
1468 | * to the consumer by issuing a SET_CHANNEL_MONITOR_PIPE and | |
1469 | * SET_CHANNEL_ROTATE_PIPE commands. | |
b3530820 JG |
1470 | */ |
1471 | cmd_socket_wrapper = consumer_allocate_socket(&consumer_data->cmd_sock); | |
1472 | if (!cmd_socket_wrapper) { | |
1473 | goto error; | |
1474 | } | |
1475 | ||
1476 | ret = consumer_send_channel_monitor_pipe(cmd_socket_wrapper, | |
1477 | consumer_data->channel_monitor_pipe); | |
1478 | if (ret) { | |
1479 | goto error; | |
1480 | } | |
6e0be6cc JD |
1481 | |
1482 | ret = consumer_send_channel_rotate_pipe(cmd_socket_wrapper, | |
1483 | consumer_data->channel_rotate_pipe); | |
1484 | if (ret) { | |
1485 | goto error; | |
1486 | } | |
1487 | ||
b3530820 JG |
1488 | /* Discard the socket wrapper as it is no longer needed. */ |
1489 | consumer_destroy_socket(cmd_socket_wrapper); | |
1490 | cmd_socket_wrapper = NULL; | |
1491 | ||
1492 | /* The thread is completely initialized, signal that it is ready. */ | |
1493 | signal_consumer_condition(consumer_data, 1); | |
1494 | ||
331744e3 | 1495 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1496 | restart_poll: |
331744e3 | 1497 | while (1) { |
42fc1d0b DG |
1498 | health_code_update(); |
1499 | ||
1500 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
1501 | if (should_quit) { | |
1502 | /* Not a health error. */ | |
1503 | err = 0; | |
1504 | goto exit; | |
1505 | } | |
1506 | ||
331744e3 JD |
1507 | health_poll_entry(); |
1508 | ret = lttng_poll_wait(&events, -1); | |
1509 | health_poll_exit(); | |
1510 | if (ret < 0) { | |
1511 | /* | |
1512 | * Restart interrupted system call. | |
1513 | */ | |
1514 | if (errno == EINTR) { | |
1515 | goto restart_poll; | |
1516 | } | |
1517 | goto error; | |
88f2b785 | 1518 | } |
72079cae | 1519 | |
331744e3 | 1520 | nb_fd = ret; |
0d9c5d77 | 1521 | |
331744e3 JD |
1522 | for (i = 0; i < nb_fd; i++) { |
1523 | /* Fetch once the poll data */ | |
1524 | revents = LTTNG_POLL_GETEV(&events, i); | |
1525 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1526 | |
331744e3 | 1527 | health_code_update(); |
44a5e5eb | 1528 | |
fd20dac9 MD |
1529 | if (!revents) { |
1530 | /* No activity for this FD (poll implementation). */ | |
1531 | continue; | |
1532 | } | |
1533 | ||
42fc1d0b DG |
1534 | /* |
1535 | * Thread quit pipe has been triggered, flag that we should stop | |
1536 | * but continue the current loop to handle potential data from | |
1537 | * consumer. | |
1538 | */ | |
1539 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 1540 | |
331744e3 JD |
1541 | if (pollfd == sock) { |
1542 | /* Event on the consumerd socket */ | |
03e43155 MD |
1543 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1544 | && !(revents & LPOLLIN)) { | |
331744e3 JD |
1545 | ERR("consumer err socket second poll error"); |
1546 | goto error; | |
1547 | } | |
1548 | health_code_update(); | |
1549 | /* Wait for any kconsumerd error */ | |
1550 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1551 | sizeof(enum lttcomm_return_code)); | |
1552 | if (ret <= 0) { | |
1553 | ERR("consumer closed the command socket"); | |
1554 | goto error; | |
1555 | } | |
1556 | ||
1557 | ERR("consumer return code : %s", | |
1558 | lttcomm_get_readable_code(-code)); | |
1559 | ||
1560 | goto exit; | |
4ce514c4 | 1561 | } else if (pollfd == consumer_data->metadata_fd) { |
03e43155 MD |
1562 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1563 | && !(revents & LPOLLIN)) { | |
1564 | ERR("consumer err metadata socket second poll error"); | |
1565 | goto error; | |
1566 | } | |
331744e3 JD |
1567 | /* UST metadata requests */ |
1568 | ret = ust_consumer_metadata_request( | |
1569 | &consumer_data->metadata_sock); | |
1570 | if (ret < 0) { | |
1571 | ERR("Handling metadata request"); | |
1572 | goto error; | |
1573 | } | |
5eb91c98 | 1574 | } |
42fc1d0b | 1575 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 1576 | } |
331744e3 | 1577 | health_code_update(); |
5eb91c98 DG |
1578 | } |
1579 | ||
139ac872 | 1580 | exit: |
1d4b027a | 1581 | error: |
fdadac08 DG |
1582 | /* |
1583 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1584 | * thread might be using them so get exclusive access which will abort all |
1585 | * other consumer command by other threads. | |
fdadac08 DG |
1586 | */ |
1587 | pthread_mutex_lock(&consumer_data->lock); | |
1588 | ||
5c827ce0 DG |
1589 | /* Immediately set the consumerd state to stopped */ |
1590 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1591 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1592 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1593 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1594 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1595 | } else { | |
1596 | /* Code flow error... */ | |
1597 | assert(0); | |
1598 | } | |
1599 | ||
76d7553f MD |
1600 | if (consumer_data->err_sock >= 0) { |
1601 | ret = close(consumer_data->err_sock); | |
1602 | if (ret) { | |
1603 | PERROR("close"); | |
1604 | } | |
a76cbd9f | 1605 | consumer_data->err_sock = -1; |
76d7553f MD |
1606 | } |
1607 | if (consumer_data->cmd_sock >= 0) { | |
1608 | ret = close(consumer_data->cmd_sock); | |
1609 | if (ret) { | |
1610 | PERROR("close"); | |
1611 | } | |
a76cbd9f | 1612 | consumer_data->cmd_sock = -1; |
76d7553f | 1613 | } |
96544455 SS |
1614 | if (consumer_data->metadata_sock.fd_ptr && |
1615 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1616 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1617 | if (ret) { |
1618 | PERROR("close"); | |
1619 | } | |
1620 | } | |
76d7553f MD |
1621 | if (sock >= 0) { |
1622 | ret = close(sock); | |
1623 | if (ret) { | |
1624 | PERROR("close"); | |
1625 | } | |
1626 | } | |
273ea72c | 1627 | |
3bd1e081 MD |
1628 | unlink(consumer_data->err_unix_sock_path); |
1629 | unlink(consumer_data->cmd_unix_sock_path); | |
fdadac08 | 1630 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1631 | |
fdadac08 | 1632 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1633 | if (consumer_data->metadata_sock.lock) { |
1634 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1635 | free(consumer_data->metadata_sock.lock); | |
1636 | } | |
5eb91c98 | 1637 | lttng_poll_clean(&events); |
b3530820 JG |
1638 | |
1639 | if (cmd_socket_wrapper) { | |
1640 | consumer_destroy_socket(cmd_socket_wrapper); | |
1641 | } | |
76d7553f | 1642 | error_poll: |
139ac872 | 1643 | if (err) { |
840cb59c | 1644 | health_error(); |
139ac872 MD |
1645 | ERR("Health error occurred in %s", __func__); |
1646 | } | |
8782cc74 | 1647 | health_unregister(health_sessiond); |
76d7553f | 1648 | DBG("consumer thread cleanup completed"); |
0177d773 | 1649 | |
34c1e15a MD |
1650 | rcu_thread_offline(); |
1651 | rcu_unregister_thread(); | |
1652 | ||
5eb91c98 | 1653 | return NULL; |
099e26bd DG |
1654 | } |
1655 | ||
099e26bd DG |
1656 | /* |
1657 | * This thread manage application communication. | |
1d4b027a DG |
1658 | */ |
1659 | static void *thread_manage_apps(void *data) | |
099e26bd | 1660 | { |
139ac872 | 1661 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1662 | ssize_t size_ret; |
5eb91c98 | 1663 | uint32_t revents, nb_fd; |
5eb91c98 | 1664 | struct lttng_poll_event events; |
099e26bd DG |
1665 | |
1666 | DBG("[thread] Manage application started"); | |
1667 | ||
f6a9efaa DG |
1668 | rcu_register_thread(); |
1669 | rcu_thread_online(); | |
1670 | ||
6c71277b | 1671 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1672 | |
e547b070 | 1673 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1674 | goto error_testpoint; |
1675 | } | |
1676 | ||
840cb59c | 1677 | health_code_update(); |
44a5e5eb | 1678 | |
d0b96690 | 1679 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1680 | if (ret < 0) { |
76d7553f | 1681 | goto error_poll_create; |
5eb91c98 | 1682 | } |
099e26bd | 1683 | |
5eb91c98 DG |
1684 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1685 | if (ret < 0) { | |
1686 | goto error; | |
1687 | } | |
099e26bd | 1688 | |
e547b070 | 1689 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1690 | goto error; |
1691 | } | |
8ac94142 | 1692 | |
840cb59c | 1693 | health_code_update(); |
44a5e5eb | 1694 | |
5eb91c98 | 1695 | while (1) { |
7fa2082e | 1696 | DBG("Apps thread polling"); |
099e26bd DG |
1697 | |
1698 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1699 | restart: |
a78af745 | 1700 | health_poll_entry(); |
5eb91c98 | 1701 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1702 | DBG("Apps thread return from poll on %d fds", |
1703 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1704 | health_poll_exit(); |
099e26bd | 1705 | if (ret < 0) { |
88f2b785 MD |
1706 | /* |
1707 | * Restart interrupted system call. | |
1708 | */ | |
1709 | if (errno == EINTR) { | |
1710 | goto restart; | |
1711 | } | |
099e26bd DG |
1712 | goto error; |
1713 | } | |
1714 | ||
0d9c5d77 DG |
1715 | nb_fd = ret; |
1716 | ||
5eb91c98 DG |
1717 | for (i = 0; i < nb_fd; i++) { |
1718 | /* Fetch once the poll data */ | |
1719 | revents = LTTNG_POLL_GETEV(&events, i); | |
1720 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1721 | ||
840cb59c | 1722 | health_code_update(); |
44a5e5eb | 1723 | |
fd20dac9 MD |
1724 | if (!revents) { |
1725 | /* No activity for this FD (poll implementation). */ | |
1726 | continue; | |
1727 | } | |
1728 | ||
5eb91c98 | 1729 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1730 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1731 | if (ret) { |
139ac872 MD |
1732 | err = 0; |
1733 | goto exit; | |
5eb91c98 | 1734 | } |
099e26bd | 1735 | |
5eb91c98 DG |
1736 | /* Inspect the apps cmd pipe */ |
1737 | if (pollfd == apps_cmd_pipe[0]) { | |
03e43155 | 1738 | if (revents & LPOLLIN) { |
d0b96690 DG |
1739 | int sock; |
1740 | ||
5eb91c98 | 1741 | /* Empty pipe */ |
6cd525e8 MD |
1742 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1743 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1744 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1745 | goto error; |
1746 | } | |
099e26bd | 1747 | |
840cb59c | 1748 | health_code_update(); |
44a5e5eb | 1749 | |
ffe60014 | 1750 | /* |
03e43155 MD |
1751 | * Since this is a command socket (write then read), |
1752 | * we only monitor the error events of the socket. | |
ffe60014 | 1753 | */ |
d0b96690 DG |
1754 | ret = lttng_poll_add(&events, sock, |
1755 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1756 | if (ret < 0) { | |
5eb91c98 | 1757 | goto error; |
e0c7ec2b | 1758 | } |
acc7b41b | 1759 | |
d0b96690 | 1760 | DBG("Apps with sock %d added to poll set", sock); |
03e43155 MD |
1761 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1762 | ERR("Apps command pipe error"); | |
1763 | goto error; | |
1764 | } else { | |
1765 | ERR("Unknown poll events %u for sock %d", revents, pollfd); | |
1766 | goto error; | |
0177d773 | 1767 | } |
5eb91c98 DG |
1768 | } else { |
1769 | /* | |
54d01ffb DG |
1770 | * At this point, we know that a registered application made |
1771 | * the event at poll_wait. | |
5eb91c98 DG |
1772 | */ |
1773 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1774 | /* Removing from the poll set */ | |
1775 | ret = lttng_poll_del(&events, pollfd); | |
1776 | if (ret < 0) { | |
1777 | goto error; | |
1778 | } | |
099e26bd | 1779 | |
b9d9b220 | 1780 | /* Socket closed on remote end. */ |
56fff090 | 1781 | ust_app_unregister(pollfd); |
03e43155 MD |
1782 | } else { |
1783 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1784 | goto error; | |
5eb91c98 | 1785 | } |
099e26bd | 1786 | } |
44a5e5eb | 1787 | |
840cb59c | 1788 | health_code_update(); |
099e26bd | 1789 | } |
099e26bd DG |
1790 | } |
1791 | ||
139ac872 | 1792 | exit: |
099e26bd | 1793 | error: |
5eb91c98 | 1794 | lttng_poll_clean(&events); |
76d7553f | 1795 | error_poll_create: |
6993eeb3 | 1796 | error_testpoint: |
6620da75 DG |
1797 | utils_close_pipe(apps_cmd_pipe); |
1798 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1799 | ||
1800 | /* | |
1801 | * We don't clean the UST app hash table here since already registered | |
1802 | * applications can still be controlled so let them be until the session | |
1803 | * daemon dies or the applications stop. | |
1804 | */ | |
1805 | ||
139ac872 | 1806 | if (err) { |
840cb59c | 1807 | health_error(); |
139ac872 MD |
1808 | ERR("Health error occurred in %s", __func__); |
1809 | } | |
8782cc74 | 1810 | health_unregister(health_sessiond); |
76d7553f | 1811 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1812 | rcu_thread_offline(); |
1813 | rcu_unregister_thread(); | |
099e26bd DG |
1814 | return NULL; |
1815 | } | |
1816 | ||
d0b96690 | 1817 | /* |
d88aee68 DG |
1818 | * Send a socket to a thread This is called from the dispatch UST registration |
1819 | * thread once all sockets are set for the application. | |
d0b96690 | 1820 | * |
b85dc84c DG |
1821 | * The sock value can be invalid, we don't really care, the thread will handle |
1822 | * it and make the necessary cleanup if so. | |
1823 | * | |
d0b96690 DG |
1824 | * On success, return 0 else a negative value being the errno message of the |
1825 | * write(). | |
1826 | */ | |
d88aee68 | 1827 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1828 | { |
6cd525e8 | 1829 | ssize_t ret; |
d0b96690 | 1830 | |
b85dc84c DG |
1831 | /* |
1832 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1833 | * before calling this function being a shutdown state of the thread. | |
1834 | */ | |
1835 | if (fd < 0) { | |
1836 | ret = -EBADF; | |
1837 | goto error; | |
1838 | } | |
d0b96690 | 1839 | |
6cd525e8 MD |
1840 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1841 | if (ret < sizeof(sock)) { | |
d88aee68 | 1842 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1843 | if (ret < 0) { |
1844 | ret = -errno; | |
1845 | } | |
1846 | goto error; | |
1847 | } | |
1848 | ||
1849 | /* All good. Don't send back the write positive ret value. */ | |
1850 | ret = 0; | |
1851 | error: | |
6cd525e8 | 1852 | return (int) ret; |
d0b96690 DG |
1853 | } |
1854 | ||
f45e313d DG |
1855 | /* |
1856 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1857 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1858 | * notify socket is never received. | |
1859 | */ | |
1860 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1861 | { | |
1862 | int ret, nb_fd = 0, i; | |
1863 | unsigned int fd_added = 0; | |
1864 | struct lttng_poll_event events; | |
1865 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1866 | ||
1867 | assert(wait_queue); | |
1868 | ||
1869 | lttng_poll_init(&events); | |
1870 | ||
1871 | /* Just skip everything for an empty queue. */ | |
1872 | if (!wait_queue->count) { | |
1873 | goto end; | |
1874 | } | |
1875 | ||
1876 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1877 | if (ret < 0) { | |
1878 | goto error_create; | |
1879 | } | |
1880 | ||
1881 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1882 | &wait_queue->head, head) { | |
1883 | assert(wait_node->app); | |
1884 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1885 | LPOLLHUP | LPOLLERR); | |
1886 | if (ret < 0) { | |
1887 | goto error; | |
1888 | } | |
1889 | ||
1890 | fd_added = 1; | |
1891 | } | |
1892 | ||
1893 | if (!fd_added) { | |
1894 | goto end; | |
1895 | } | |
1896 | ||
1897 | /* | |
1898 | * Poll but don't block so we can quickly identify the faulty events and | |
1899 | * clean them afterwards from the wait queue. | |
1900 | */ | |
1901 | ret = lttng_poll_wait(&events, 0); | |
1902 | if (ret < 0) { | |
1903 | goto error; | |
1904 | } | |
1905 | nb_fd = ret; | |
1906 | ||
1907 | for (i = 0; i < nb_fd; i++) { | |
1908 | /* Get faulty FD. */ | |
1909 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1910 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1911 | ||
fd20dac9 MD |
1912 | if (!revents) { |
1913 | /* No activity for this FD (poll implementation). */ | |
1914 | continue; | |
1915 | } | |
1916 | ||
f45e313d DG |
1917 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1918 | &wait_queue->head, head) { | |
1919 | if (pollfd == wait_node->app->sock && | |
1920 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1921 | cds_list_del(&wait_node->head); | |
1922 | wait_queue->count--; | |
1923 | ust_app_destroy(wait_node->app); | |
1924 | free(wait_node); | |
48b40bcf JG |
1925 | /* |
1926 | * Silence warning of use-after-free in | |
1927 | * cds_list_for_each_entry_safe which uses | |
1928 | * __typeof__(*wait_node). | |
1929 | */ | |
1930 | wait_node = NULL; | |
f45e313d | 1931 | break; |
03e43155 MD |
1932 | } else { |
1933 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1934 | goto error; | |
f45e313d DG |
1935 | } |
1936 | } | |
1937 | } | |
1938 | ||
1939 | if (nb_fd > 0) { | |
1940 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1941 | } | |
1942 | ||
1943 | end: | |
1944 | lttng_poll_clean(&events); | |
1945 | return; | |
1946 | ||
1947 | error: | |
1948 | lttng_poll_clean(&events); | |
1949 | error_create: | |
1950 | ERR("Unable to sanitize wait queue"); | |
1951 | return; | |
1952 | } | |
1953 | ||
099e26bd DG |
1954 | /* |
1955 | * Dispatch request from the registration threads to the application | |
1956 | * communication thread. | |
1957 | */ | |
1958 | static void *thread_dispatch_ust_registration(void *data) | |
1959 | { | |
12e2b881 | 1960 | int ret, err = -1; |
8bdee6e2 | 1961 | struct cds_wfcq_node *node; |
099e26bd | 1962 | struct ust_command *ust_cmd = NULL; |
f45e313d DG |
1963 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1964 | struct ust_reg_wait_queue wait_queue = { | |
1965 | .count = 0, | |
1966 | }; | |
d0b96690 | 1967 | |
967e3668 MD |
1968 | rcu_register_thread(); |
1969 | ||
6c71277b | 1970 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1971 | |
9ad42ec1 MD |
1972 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1973 | goto error_testpoint; | |
1974 | } | |
1975 | ||
12e2b881 MD |
1976 | health_code_update(); |
1977 | ||
f45e313d | 1978 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1979 | |
1980 | DBG("[thread] Dispatch UST command started"); | |
1981 | ||
0ed3b1a8 | 1982 | for (;;) { |
12e2b881 MD |
1983 | health_code_update(); |
1984 | ||
099e26bd DG |
1985 | /* Atomically prepare the queue futex */ |
1986 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1987 | ||
0ed3b1a8 MD |
1988 | if (CMM_LOAD_SHARED(dispatch_thread_exit)) { |
1989 | break; | |
1990 | } | |
1991 | ||
099e26bd | 1992 | do { |
d0b96690 | 1993 | struct ust_app *app = NULL; |
7972aab2 | 1994 | ust_cmd = NULL; |
d0b96690 | 1995 | |
f45e313d DG |
1996 | /* |
1997 | * Make sure we don't have node(s) that have hung up before receiving | |
1998 | * the notify socket. This is to clean the list in order to avoid | |
1999 | * memory leaks from notify socket that are never seen. | |
2000 | */ | |
2001 | sanitize_wait_queue(&wait_queue); | |
2002 | ||
12e2b881 | 2003 | health_code_update(); |
099e26bd | 2004 | /* Dequeue command for registration */ |
8bdee6e2 | 2005 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 2006 | if (node == NULL) { |
00a17c97 | 2007 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
2008 | /* Continue thread execution */ |
2009 | break; | |
2010 | } | |
2011 | ||
2012 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
2013 | ||
2f50c8a3 DG |
2014 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
2015 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2016 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2017 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2018 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2019 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
2020 | |
2021 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
2022 | wait_node = zmalloc(sizeof(*wait_node)); | |
2023 | if (!wait_node) { | |
2024 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
2025 | ret = close(ust_cmd->sock); |
2026 | if (ret < 0) { | |
2027 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
2028 | } | |
51dec90d | 2029 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 2030 | free(ust_cmd); |
d0b96690 DG |
2031 | goto error; |
2032 | } | |
2033 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
2034 | ||
2035 | /* Create application object if socket is CMD. */ | |
2036 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
2037 | ust_cmd->sock); | |
2038 | if (!wait_node->app) { | |
2039 | ret = close(ust_cmd->sock); | |
2040 | if (ret < 0) { | |
2041 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 2042 | } |
51dec90d | 2043 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 2044 | free(wait_node); |
7972aab2 | 2045 | free(ust_cmd); |
d0b96690 DG |
2046 | continue; |
2047 | } | |
2048 | /* | |
2049 | * Add application to the wait queue so we can set the notify | |
2050 | * socket before putting this object in the global ht. | |
2051 | */ | |
f45e313d DG |
2052 | cds_list_add(&wait_node->head, &wait_queue.head); |
2053 | wait_queue.count++; | |
d0b96690 | 2054 | |
7972aab2 | 2055 | free(ust_cmd); |
d0b96690 DG |
2056 | /* |
2057 | * We have to continue here since we don't have the notify | |
2058 | * socket and the application MUST be added to the hash table | |
2059 | * only at that moment. | |
2060 | */ | |
2061 | continue; | |
2062 | } else { | |
2063 | /* | |
2064 | * Look for the application in the local wait queue and set the | |
2065 | * notify socket if found. | |
2066 | */ | |
d88aee68 | 2067 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 2068 | &wait_queue.head, head) { |
12e2b881 | 2069 | health_code_update(); |
d0b96690 DG |
2070 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
2071 | wait_node->app->notify_sock = ust_cmd->sock; | |
2072 | cds_list_del(&wait_node->head); | |
f45e313d | 2073 | wait_queue.count--; |
d0b96690 DG |
2074 | app = wait_node->app; |
2075 | free(wait_node); | |
2076 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
2077 | break; | |
2078 | } | |
2079 | } | |
020d7f60 DG |
2080 | |
2081 | /* | |
2082 | * With no application at this stage the received socket is | |
2083 | * basically useless so close it before we free the cmd data | |
2084 | * structure for good. | |
2085 | */ | |
2086 | if (!app) { | |
2087 | ret = close(ust_cmd->sock); | |
2088 | if (ret < 0) { | |
2089 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
2090 | } | |
51dec90d | 2091 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 2092 | } |
7972aab2 | 2093 | free(ust_cmd); |
d0b96690 DG |
2094 | } |
2095 | ||
2096 | if (app) { | |
d0b96690 DG |
2097 | /* |
2098 | * @session_lock_list | |
2099 | * | |
2100 | * Lock the global session list so from the register up to the | |
2101 | * registration done message, no thread can see the application | |
2102 | * and change its state. | |
2103 | */ | |
2104 | session_lock_list(); | |
2105 | rcu_read_lock(); | |
d88aee68 | 2106 | |
d0b96690 DG |
2107 | /* |
2108 | * Add application to the global hash table. This needs to be | |
2109 | * done before the update to the UST registry can locate the | |
2110 | * application. | |
2111 | */ | |
2112 | ust_app_add(app); | |
d88aee68 DG |
2113 | |
2114 | /* Set app version. This call will print an error if needed. */ | |
2115 | (void) ust_app_version(app); | |
2116 | ||
2117 | /* Send notify socket through the notify pipe. */ | |
2118 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
2119 | app->notify_sock); | |
2120 | if (ret < 0) { | |
2121 | rcu_read_unlock(); | |
2122 | session_unlock_list(); | |
b85dc84c DG |
2123 | /* |
2124 | * No notify thread, stop the UST tracing. However, this is | |
2125 | * not an internal error of the this thread thus setting | |
2126 | * the health error code to a normal exit. | |
2127 | */ | |
2128 | err = 0; | |
d88aee68 | 2129 | goto error; |
6620da75 | 2130 | } |
d88aee68 | 2131 | |
d0b96690 DG |
2132 | /* |
2133 | * Update newly registered application with the tracing | |
2134 | * registry info already enabled information. | |
2135 | */ | |
2136 | update_ust_app(app->sock); | |
d88aee68 DG |
2137 | |
2138 | /* | |
2139 | * Don't care about return value. Let the manage apps threads | |
2140 | * handle app unregistration upon socket close. | |
2141 | */ | |
fb45065e | 2142 | (void) ust_app_register_done(app); |
d88aee68 DG |
2143 | |
2144 | /* | |
2145 | * Even if the application socket has been closed, send the app | |
2146 | * to the thread and unregistration will take place at that | |
2147 | * place. | |
2148 | */ | |
2149 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 2150 | if (ret < 0) { |
d88aee68 DG |
2151 | rcu_read_unlock(); |
2152 | session_unlock_list(); | |
b85dc84c DG |
2153 | /* |
2154 | * No apps. thread, stop the UST tracing. However, this is | |
2155 | * not an internal error of the this thread thus setting | |
2156 | * the health error code to a normal exit. | |
2157 | */ | |
2158 | err = 0; | |
d88aee68 | 2159 | goto error; |
d0b96690 | 2160 | } |
d88aee68 | 2161 | |
d0b96690 DG |
2162 | rcu_read_unlock(); |
2163 | session_unlock_list(); | |
099e26bd | 2164 | } |
099e26bd DG |
2165 | } while (node != NULL); |
2166 | ||
12e2b881 | 2167 | health_poll_entry(); |
099e26bd DG |
2168 | /* Futex wait on queue. Blocking call on futex() */ |
2169 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 2170 | health_poll_exit(); |
099e26bd | 2171 | } |
12e2b881 MD |
2172 | /* Normal exit, no error */ |
2173 | err = 0; | |
099e26bd DG |
2174 | |
2175 | error: | |
d88aee68 DG |
2176 | /* Clean up wait queue. */ |
2177 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 2178 | &wait_queue.head, head) { |
d88aee68 | 2179 | cds_list_del(&wait_node->head); |
f45e313d | 2180 | wait_queue.count--; |
d88aee68 DG |
2181 | free(wait_node); |
2182 | } | |
2183 | ||
772b8f4d MD |
2184 | /* Empty command queue. */ |
2185 | for (;;) { | |
2186 | /* Dequeue command for registration */ | |
2187 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); | |
2188 | if (node == NULL) { | |
2189 | break; | |
2190 | } | |
2191 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
2192 | ret = close(ust_cmd->sock); | |
2193 | if (ret < 0) { | |
2194 | PERROR("close ust sock exit dispatch %d", ust_cmd->sock); | |
2195 | } | |
2196 | lttng_fd_put(LTTNG_FD_APPS, 1); | |
2197 | free(ust_cmd); | |
2198 | } | |
2199 | ||
9ad42ec1 | 2200 | error_testpoint: |
099e26bd | 2201 | DBG("Dispatch thread dying"); |
12e2b881 MD |
2202 | if (err) { |
2203 | health_error(); | |
2204 | ERR("Health error occurred in %s", __func__); | |
2205 | } | |
8782cc74 | 2206 | health_unregister(health_sessiond); |
967e3668 | 2207 | rcu_unregister_thread(); |
099e26bd DG |
2208 | return NULL; |
2209 | } | |
2210 | ||
2211 | /* | |
2212 | * This thread manage application registration. | |
2213 | */ | |
2214 | static void *thread_registration_apps(void *data) | |
1d4b027a | 2215 | { |
139ac872 | 2216 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
2217 | uint32_t revents, nb_fd; |
2218 | struct lttng_poll_event events; | |
099e26bd DG |
2219 | /* |
2220 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
2221 | * freed in the manage apps thread. | |
2222 | */ | |
2223 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 2224 | |
099e26bd | 2225 | DBG("[thread] Manage application registration started"); |
1d4b027a | 2226 | |
6c71277b | 2227 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 2228 | |
e547b070 | 2229 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
2230 | goto error_testpoint; |
2231 | } | |
8ac94142 | 2232 | |
1d4b027a DG |
2233 | ret = lttcomm_listen_unix_sock(apps_sock); |
2234 | if (ret < 0) { | |
76d7553f | 2235 | goto error_listen; |
1d4b027a DG |
2236 | } |
2237 | ||
5eb91c98 DG |
2238 | /* |
2239 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
2240 | * more will be added to this poll set. | |
2241 | */ | |
d0b96690 | 2242 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 2243 | if (ret < 0) { |
76d7553f | 2244 | goto error_create_poll; |
5eb91c98 | 2245 | } |
273ea72c | 2246 | |
5eb91c98 DG |
2247 | /* Add the application registration socket */ |
2248 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
2249 | if (ret < 0) { | |
76d7553f | 2250 | goto error_poll_add; |
5eb91c98 | 2251 | } |
273ea72c | 2252 | |
1d4b027a | 2253 | /* Notify all applications to register */ |
0fdd1e2c DG |
2254 | ret = notify_ust_apps(1); |
2255 | if (ret < 0) { | |
2256 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
2257 | "Execution continues but there might be problem for already\n" |
2258 | "running applications that wishes to register."); | |
0fdd1e2c | 2259 | } |
1d4b027a DG |
2260 | |
2261 | while (1) { | |
2262 | DBG("Accepting application registration"); | |
273ea72c DG |
2263 | |
2264 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 2265 | restart: |
a78af745 | 2266 | health_poll_entry(); |
5eb91c98 | 2267 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 2268 | health_poll_exit(); |
273ea72c | 2269 | if (ret < 0) { |
88f2b785 MD |
2270 | /* |
2271 | * Restart interrupted system call. | |
2272 | */ | |
2273 | if (errno == EINTR) { | |
2274 | goto restart; | |
2275 | } | |
273ea72c DG |
2276 | goto error; |
2277 | } | |
2278 | ||
0d9c5d77 DG |
2279 | nb_fd = ret; |
2280 | ||
5eb91c98 | 2281 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 2282 | health_code_update(); |
139ac872 | 2283 | |
5eb91c98 DG |
2284 | /* Fetch once the poll data */ |
2285 | revents = LTTNG_POLL_GETEV(&events, i); | |
2286 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 2287 | |
fd20dac9 MD |
2288 | if (!revents) { |
2289 | /* No activity for this FD (poll implementation). */ | |
2290 | continue; | |
2291 | } | |
2292 | ||
5eb91c98 | 2293 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 2294 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 2295 | if (ret) { |
139ac872 MD |
2296 | err = 0; |
2297 | goto exit; | |
90014c57 | 2298 | } |
1d4b027a | 2299 | |
5eb91c98 DG |
2300 | /* Event on the registration socket */ |
2301 | if (pollfd == apps_sock) { | |
03e43155 | 2302 | if (revents & LPOLLIN) { |
5eb91c98 DG |
2303 | sock = lttcomm_accept_unix_sock(apps_sock); |
2304 | if (sock < 0) { | |
2305 | goto error; | |
2306 | } | |
099e26bd | 2307 | |
16c5c8fa DG |
2308 | /* |
2309 | * Set socket timeout for both receiving and ending. | |
2310 | * app_socket_timeout is in seconds, whereas | |
2311 | * lttcomm_setsockopt_rcv_timeout and | |
2312 | * lttcomm_setsockopt_snd_timeout expect msec as | |
2313 | * parameter. | |
2314 | */ | |
28ce0ff2 JG |
2315 | if (app_socket_timeout >= 0) { |
2316 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
2317 | app_socket_timeout * 1000); | |
2318 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
2319 | app_socket_timeout * 1000); | |
2320 | } | |
16c5c8fa | 2321 | |
b662582b DG |
2322 | /* |
2323 | * Set the CLOEXEC flag. Return code is useless because | |
2324 | * either way, the show must go on. | |
2325 | */ | |
2326 | (void) utils_set_fd_cloexec(sock); | |
2327 | ||
5eb91c98 | 2328 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 2329 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 2330 | if (ust_cmd == NULL) { |
76d7553f | 2331 | PERROR("ust command zmalloc"); |
41ed8e47 MD |
2332 | ret = close(sock); |
2333 | if (ret) { | |
2334 | PERROR("close"); | |
2335 | } | |
5eb91c98 DG |
2336 | goto error; |
2337 | } | |
1d4b027a | 2338 | |
5eb91c98 DG |
2339 | /* |
2340 | * Using message-based transmissions to ensure we don't | |
2341 | * have to deal with partially received messages. | |
2342 | */ | |
4063050c MD |
2343 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
2344 | if (ret < 0) { | |
2345 | ERR("Exhausted file descriptors allowed for applications."); | |
2346 | free(ust_cmd); | |
2347 | ret = close(sock); | |
2348 | if (ret) { | |
2349 | PERROR("close"); | |
2350 | } | |
2351 | sock = -1; | |
2352 | continue; | |
2353 | } | |
d88aee68 | 2354 | |
840cb59c | 2355 | health_code_update(); |
d0b96690 DG |
2356 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
2357 | if (ret < 0) { | |
5eb91c98 | 2358 | free(ust_cmd); |
d0b96690 | 2359 | /* Close socket of the application. */ |
76d7553f MD |
2360 | ret = close(sock); |
2361 | if (ret) { | |
2362 | PERROR("close"); | |
2363 | } | |
4063050c | 2364 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 2365 | sock = -1; |
5eb91c98 DG |
2366 | continue; |
2367 | } | |
840cb59c | 2368 | health_code_update(); |
099e26bd | 2369 | |
5eb91c98 | 2370 | ust_cmd->sock = sock; |
34a2494f | 2371 | sock = -1; |
099e26bd | 2372 | |
5eb91c98 DG |
2373 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2374 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2375 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2376 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2377 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2378 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2379 | |
5eb91c98 DG |
2380 | /* |
2381 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2382 | * has been taken! This apps will be part of the *system*. |
5eb91c98 | 2383 | */ |
8bdee6e2 | 2384 | cds_wfcq_enqueue(&ust_cmd_queue.head, &ust_cmd_queue.tail, &ust_cmd->node); |
5eb91c98 DG |
2385 | |
2386 | /* | |
2387 | * Wake the registration queue futex. Implicit memory | |
8bdee6e2 | 2388 | * barrier with the exchange in cds_wfcq_enqueue. |
5eb91c98 DG |
2389 | */ |
2390 | futex_nto1_wake(&ust_cmd_queue.futex); | |
03e43155 MD |
2391 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2392 | ERR("Register apps socket poll error"); | |
2393 | goto error; | |
2394 | } else { | |
2395 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2396 | goto error; | |
5eb91c98 DG |
2397 | } |
2398 | } | |
90014c57 | 2399 | } |
1d4b027a DG |
2400 | } |
2401 | ||
139ac872 | 2402 | exit: |
1d4b027a | 2403 | error: |
0fdd1e2c DG |
2404 | /* Notify that the registration thread is gone */ |
2405 | notify_ust_apps(0); | |
2406 | ||
a4b35e07 | 2407 | if (apps_sock >= 0) { |
76d7553f MD |
2408 | ret = close(apps_sock); |
2409 | if (ret) { | |
2410 | PERROR("close"); | |
2411 | } | |
a4b35e07 | 2412 | } |
46c3f085 | 2413 | if (sock >= 0) { |
76d7553f MD |
2414 | ret = close(sock); |
2415 | if (ret) { | |
2416 | PERROR("close"); | |
2417 | } | |
4063050c | 2418 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2419 | } |
273ea72c | 2420 | unlink(apps_unix_sock_path); |
0fdd1e2c | 2421 | |
76d7553f | 2422 | error_poll_add: |
5eb91c98 | 2423 | lttng_poll_clean(&events); |
76d7553f MD |
2424 | error_listen: |
2425 | error_create_poll: | |
6993eeb3 | 2426 | error_testpoint: |
76d7553f | 2427 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2428 | if (err) { |
2429 | health_error(); | |
2430 | ERR("Health error occurred in %s", __func__); | |
2431 | } | |
8782cc74 | 2432 | health_unregister(health_sessiond); |
5eb91c98 | 2433 | |
1d4b027a DG |
2434 | return NULL; |
2435 | } | |
2436 | ||
8c0faa1d | 2437 | /* |
3bd1e081 | 2438 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2439 | * exec or it will fails. |
8c0faa1d | 2440 | */ |
3bd1e081 | 2441 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2442 | { |
a23ec3a7 | 2443 | int ret, clock_ret; |
ee0b0061 DG |
2444 | struct timespec timeout; |
2445 | ||
13a7bce3 JG |
2446 | /* |
2447 | * Make sure we set the readiness flag to 0 because we are NOT ready. | |
2448 | * This access to consumer_thread_is_ready does not need to be | |
2449 | * protected by consumer_data.cond_mutex (yet) since the consumer | |
2450 | * management thread has not been started at this point. | |
2451 | */ | |
a23ec3a7 | 2452 | consumer_data->consumer_thread_is_ready = 0; |
8c0faa1d | 2453 | |
a23ec3a7 DG |
2454 | /* Setup pthread condition */ |
2455 | ret = pthread_condattr_init(&consumer_data->condattr); | |
4a15001e | 2456 | if (ret) { |
a23ec3a7 DG |
2457 | errno = ret; |
2458 | PERROR("pthread_condattr_init consumer data"); | |
2459 | goto error; | |
2460 | } | |
2461 | ||
2462 | /* | |
2463 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2464 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2465 | * for a more details and how we noticed it. | |
2466 | */ | |
2467 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
4a15001e | 2468 | if (ret) { |
a23ec3a7 DG |
2469 | errno = ret; |
2470 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2471 | goto error; |
2472 | } | |
8c0faa1d | 2473 | |
a23ec3a7 | 2474 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
4a15001e | 2475 | if (ret) { |
a23ec3a7 DG |
2476 | errno = ret; |
2477 | PERROR("pthread_cond_init consumer data"); | |
2478 | goto error; | |
2479 | } | |
2480 | ||
1a1a34b4 MJ |
2481 | ret = pthread_create(&consumer_data->thread, default_pthread_attr(), |
2482 | thread_manage_consumer, consumer_data); | |
4a15001e MD |
2483 | if (ret) { |
2484 | errno = ret; | |
3bd1e081 | 2485 | PERROR("pthread_create consumer"); |
ee0b0061 | 2486 | ret = -1; |
8c0faa1d DG |
2487 | goto error; |
2488 | } | |
2489 | ||
a23ec3a7 DG |
2490 | /* We are about to wait on a pthread condition */ |
2491 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2492 | ||
ee0b0061 | 2493 | /* Get time for sem_timedwait absolute timeout */ |
389fbf04 | 2494 | clock_ret = lttng_clock_gettime(CLOCK_MONOTONIC, &timeout); |
a23ec3a7 DG |
2495 | /* |
2496 | * Set the timeout for the condition timed wait even if the clock gettime | |
2497 | * call fails since we might loop on that call and we want to avoid to | |
2498 | * increment the timeout too many times. | |
2499 | */ | |
2500 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2501 | ||
2502 | /* | |
2503 | * The following loop COULD be skipped in some conditions so this is why we | |
2504 | * set ret to 0 in order to make sure at least one round of the loop is | |
2505 | * done. | |
2506 | */ | |
2507 | ret = 0; | |
2508 | ||
2509 | /* | |
2510 | * Loop until the condition is reached or when a timeout is reached. Note | |
2511 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2512 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2513 | * possible. This loop does not take any chances and works with both of | |
2514 | * them. | |
2515 | */ | |
2516 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2517 | if (clock_ret < 0) { | |
2518 | PERROR("clock_gettime spawn consumer"); | |
2519 | /* Infinite wait for the consumerd thread to be ready */ | |
2520 | ret = pthread_cond_wait(&consumer_data->cond, | |
2521 | &consumer_data->cond_mutex); | |
2522 | } else { | |
2523 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2524 | &consumer_data->cond_mutex, &timeout); | |
2525 | } | |
ee0b0061 | 2526 | } |
8c0faa1d | 2527 | |
a23ec3a7 DG |
2528 | /* Release the pthread condition */ |
2529 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2530 | ||
2531 | if (ret != 0) { | |
2532 | errno = ret; | |
2533 | if (ret == ETIMEDOUT) { | |
4282f9a3 DG |
2534 | int pth_ret; |
2535 | ||
ee0b0061 DG |
2536 | /* |
2537 | * Call has timed out so we kill the kconsumerd_thread and return | |
2538 | * an error. | |
2539 | */ | |
a23ec3a7 DG |
2540 | ERR("Condition timed out. The consumer thread was never ready." |
2541 | " Killing it"); | |
4282f9a3 DG |
2542 | pth_ret = pthread_cancel(consumer_data->thread); |
2543 | if (pth_ret < 0) { | |
3bd1e081 | 2544 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2545 | } |
2546 | } else { | |
a23ec3a7 | 2547 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 | 2548 | } |
4282f9a3 DG |
2549 | /* Caller is expecting a negative value on failure. */ |
2550 | ret = -1; | |
ee0b0061 DG |
2551 | goto error; |
2552 | } | |
2553 | ||
3bd1e081 MD |
2554 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2555 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2556 | ERR("Consumerd did not start"); |
3bd1e081 | 2557 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2558 | goto error; |
2559 | } | |
3bd1e081 | 2560 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2561 | |
8c0faa1d DG |
2562 | return 0; |
2563 | ||
2564 | error: | |
2565 | return ret; | |
2566 | } | |
2567 | ||
d9800920 | 2568 | /* |
3bd1e081 | 2569 | * Join consumer thread |
d9800920 | 2570 | */ |
3bd1e081 | 2571 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2572 | { |
2573 | void *status; | |
cf3af59e | 2574 | |
e8209f6b DG |
2575 | /* Consumer pid must be a real one. */ |
2576 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2577 | int ret; |
3bd1e081 | 2578 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2579 | if (ret) { |
4a15001e | 2580 | PERROR("Error killing consumer daemon"); |
cf3af59e MD |
2581 | return ret; |
2582 | } | |
3bd1e081 | 2583 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2584 | } else { |
2585 | return 0; | |
2586 | } | |
2587 | } | |
2588 | ||
8c0faa1d | 2589 | /* |
3bd1e081 | 2590 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2591 | * |
d063d709 | 2592 | * Return pid if successful else -1. |
8c0faa1d | 2593 | */ |
3bd1e081 | 2594 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2595 | { |
2596 | int ret; | |
2597 | pid_t pid; | |
94c55f17 | 2598 | const char *consumer_to_use; |
53086306 | 2599 | const char *verbosity; |
94c55f17 | 2600 | struct stat st; |
8c0faa1d | 2601 | |
3bd1e081 | 2602 | DBG("Spawning consumerd"); |
c49dc785 | 2603 | |
8c0faa1d DG |
2604 | pid = fork(); |
2605 | if (pid == 0) { | |
2606 | /* | |
3bd1e081 | 2607 | * Exec consumerd. |
8c0faa1d | 2608 | */ |
daee5345 | 2609 | if (opt_verbose_consumer) { |
53086306 | 2610 | verbosity = "--verbose"; |
4421f712 | 2611 | } else if (lttng_opt_quiet) { |
53086306 | 2612 | verbosity = "--quiet"; |
4421f712 DG |
2613 | } else { |
2614 | verbosity = ""; | |
53086306 | 2615 | } |
4421f712 | 2616 | |
3bd1e081 MD |
2617 | switch (consumer_data->type) { |
2618 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2619 | /* |
c7704d57 DG |
2620 | * Find out which consumerd to execute. We will first try the |
2621 | * 64-bit path, then the sessiond's installation directory, and | |
2622 | * fallback on the 32-bit one, | |
94c55f17 | 2623 | */ |
63a799e8 AM |
2624 | DBG3("Looking for a kernel consumer at these locations:"); |
2625 | DBG3(" 1) %s", consumerd64_bin); | |
2626 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
2627 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 2628 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 2629 | DBG3("Found location #1"); |
94c55f17 | 2630 | consumer_to_use = consumerd64_bin; |
94c55f17 | 2631 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 2632 | DBG3("Found location #2"); |
94c55f17 | 2633 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 2634 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 2635 | DBG3("Found location #3"); |
eb1e0bd4 | 2636 | consumer_to_use = consumerd32_bin; |
94c55f17 | 2637 | } else { |
63a799e8 | 2638 | DBG("Could not find any valid consumerd executable"); |
4282f9a3 | 2639 | ret = -EINVAL; |
3d678709 | 2640 | goto error; |
94c55f17 AM |
2641 | } |
2642 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
6e2cc8d8 | 2643 | (void) execl(consumer_to_use, |
94c55f17 AM |
2644 | "lttng-consumerd", verbosity, "-k", |
2645 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2646 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2647 | "--group", tracing_group_name, |
94c55f17 | 2648 | NULL); |
3bd1e081 | 2649 | break; |
7753dea8 MD |
2650 | case LTTNG_CONSUMER64_UST: |
2651 | { | |
b1e0b6b6 | 2652 | char *tmpnew = NULL; |
8f4905da MD |
2653 | |
2654 | if (consumerd64_libdir[0] != '\0') { | |
2655 | char *tmp; | |
2656 | size_t tmplen; | |
2657 | ||
e8fa9fb0 | 2658 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2659 | if (!tmp) { |
2660 | tmp = ""; | |
2661 | } | |
2662 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2663 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
2664 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2665 | if (!tmpnew) { | |
2666 | ret = -ENOMEM; | |
2667 | goto error; | |
2668 | } | |
2669 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2670 | strcat(tmpnew, consumerd64_libdir); | |
2671 | if (tmp[0] != '\0') { | |
2672 | strcat(tmpnew, ":"); | |
2673 | strcat(tmpnew, tmp); | |
2674 | } | |
2675 | ret = putenv(tmpnew); | |
2676 | if (ret) { | |
2677 | ret = -errno; | |
c6f76da9 | 2678 | free(tmpnew); |
8f4905da MD |
2679 | goto error; |
2680 | } | |
2681 | } | |
94c55f17 | 2682 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
6e2cc8d8 | 2683 | (void) execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2684 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2685 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2686 | "--group", tracing_group_name, |
7753dea8 | 2687 | NULL); |
8f4905da MD |
2688 | if (consumerd64_libdir[0] != '\0') { |
2689 | free(tmpnew); | |
2690 | } | |
3bd1e081 | 2691 | break; |
7753dea8 MD |
2692 | } |
2693 | case LTTNG_CONSUMER32_UST: | |
2694 | { | |
937dde8e | 2695 | char *tmpnew = NULL; |
8f4905da MD |
2696 | |
2697 | if (consumerd32_libdir[0] != '\0') { | |
2698 | char *tmp; | |
2699 | size_t tmplen; | |
2700 | ||
e8fa9fb0 | 2701 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2702 | if (!tmp) { |
2703 | tmp = ""; | |
2704 | } | |
2705 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2706 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2707 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2708 | if (!tmpnew) { | |
2709 | ret = -ENOMEM; | |
2710 | goto error; | |
2711 | } | |
2712 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2713 | strcat(tmpnew, consumerd32_libdir); | |
2714 | if (tmp[0] != '\0') { | |
2715 | strcat(tmpnew, ":"); | |
2716 | strcat(tmpnew, tmp); | |
2717 | } | |
2718 | ret = putenv(tmpnew); | |
2719 | if (ret) { | |
2720 | ret = -errno; | |
c6f76da9 | 2721 | free(tmpnew); |
8f4905da MD |
2722 | goto error; |
2723 | } | |
2724 | } | |
94c55f17 | 2725 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
6e2cc8d8 | 2726 | (void) execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2727 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2728 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2729 | "--group", tracing_group_name, |
7753dea8 | 2730 | NULL); |
8f4905da MD |
2731 | if (consumerd32_libdir[0] != '\0') { |
2732 | free(tmpnew); | |
2733 | } | |
7753dea8 MD |
2734 | break; |
2735 | } | |
3bd1e081 | 2736 | default: |
76d7553f | 2737 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2738 | exit(EXIT_FAILURE); |
2739 | } | |
8c0faa1d | 2740 | if (errno != 0) { |
4282f9a3 | 2741 | PERROR("Consumer execl()"); |
8c0faa1d | 2742 | } |
4282f9a3 | 2743 | /* Reaching this point, we got a failure on our execl(). */ |
8c0faa1d DG |
2744 | exit(EXIT_FAILURE); |
2745 | } else if (pid > 0) { | |
2746 | ret = pid; | |
8c0faa1d | 2747 | } else { |
76d7553f | 2748 | PERROR("start consumer fork"); |
8c0faa1d | 2749 | ret = -errno; |
8c0faa1d | 2750 | } |
8f4905da | 2751 | error: |
8c0faa1d DG |
2752 | return ret; |
2753 | } | |
2754 | ||
693bd40b | 2755 | /* |
3bd1e081 | 2756 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2757 | */ |
3bd1e081 | 2758 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2759 | { |
c617c0c6 | 2760 | int ret; |
edb8b045 DG |
2761 | |
2762 | /* | |
2763 | * Set the listen() state on the socket since there is a possible race | |
2764 | * between the exec() of the consumer daemon and this call if place in the | |
2765 | * consumer thread. See bug #366 for more details. | |
2766 | */ | |
2767 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2768 | if (ret < 0) { | |
2769 | goto error; | |
2770 | } | |
693bd40b | 2771 | |
3bd1e081 MD |
2772 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2773 | if (consumer_data->pid != 0) { | |
2774 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2775 | goto end; |
2776 | } | |
693bd40b | 2777 | |
3bd1e081 | 2778 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2779 | if (ret < 0) { |
3bd1e081 MD |
2780 | ERR("Spawning consumerd failed"); |
2781 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2782 | goto error; |
693bd40b | 2783 | } |
c49dc785 | 2784 | |
3bd1e081 MD |
2785 | /* Setting up the consumer_data pid */ |
2786 | consumer_data->pid = ret; | |
48842b30 | 2787 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2788 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2789 | |
3bd1e081 MD |
2790 | DBG2("Spawning consumer control thread"); |
2791 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2792 | if (ret < 0) { |
3bd1e081 | 2793 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2794 | goto error; |
2795 | } | |
2796 | ||
c49dc785 | 2797 | end: |
693bd40b DG |
2798 | return 0; |
2799 | ||
2800 | error: | |
331744e3 | 2801 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2802 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2803 | int err; |
2804 | ||
edb8b045 DG |
2805 | err = close(consumer_data->err_sock); |
2806 | if (err < 0) { | |
2807 | PERROR("close consumer data error socket"); | |
2808 | } | |
2809 | } | |
693bd40b DG |
2810 | return ret; |
2811 | } | |
2812 | ||
b73401da | 2813 | /* |
096102bd | 2814 | * Setup necessary data for kernel tracer action. |
b73401da | 2815 | */ |
096102bd | 2816 | static int init_kernel_tracer(void) |
b73401da DG |
2817 | { |
2818 | int ret; | |
b73401da | 2819 | |
096102bd DG |
2820 | /* Modprobe lttng kernel modules */ |
2821 | ret = modprobe_lttng_control(); | |
b73401da | 2822 | if (ret < 0) { |
b73401da DG |
2823 | goto error; |
2824 | } | |
2825 | ||
096102bd DG |
2826 | /* Open debugfs lttng */ |
2827 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2828 | if (kernel_tracer_fd < 0) { | |
2829 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b | 2830 | goto error_open; |
54d01ffb DG |
2831 | } |
2832 | ||
2f77fc4b DG |
2833 | /* Validate kernel version */ |
2834 | ret = kernel_validate_version(kernel_tracer_fd); | |
2835 | if (ret < 0) { | |
2836 | goto error_version; | |
b551a063 | 2837 | } |
54d01ffb | 2838 | |
2f77fc4b DG |
2839 | ret = modprobe_lttng_data(); |
2840 | if (ret < 0) { | |
2841 | goto error_modules; | |
54d01ffb DG |
2842 | } |
2843 | ||
6e21424e JR |
2844 | ret = kernel_supports_ring_buffer_snapshot_sample_positions( |
2845 | kernel_tracer_fd); | |
2846 | if (ret < 0) { | |
2847 | goto error_modules; | |
2848 | } | |
2849 | ||
2850 | if (ret < 1) { | |
2851 | WARN("Kernel tracer does not support buffer monitoring. " | |
2852 | "The monitoring timer of channels in the kernel domain " | |
2853 | "will be set to 0 (disabled)."); | |
2854 | } | |
2855 | ||
2f77fc4b DG |
2856 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2857 | return 0; | |
2858 | ||
2859 | error_version: | |
2860 | modprobe_remove_lttng_control(); | |
2861 | ret = close(kernel_tracer_fd); | |
2862 | if (ret) { | |
2863 | PERROR("close"); | |
b551a063 | 2864 | } |
2f77fc4b | 2865 | kernel_tracer_fd = -1; |
f73fabfd | 2866 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2867 | |
2f77fc4b DG |
2868 | error_modules: |
2869 | ret = close(kernel_tracer_fd); | |
2870 | if (ret) { | |
2871 | PERROR("close"); | |
b551a063 | 2872 | } |
54d01ffb | 2873 | |
2f77fc4b DG |
2874 | error_open: |
2875 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2876 | |
2877 | error: | |
2f77fc4b DG |
2878 | WARN("No kernel tracer available"); |
2879 | kernel_tracer_fd = -1; | |
2880 | if (!is_root) { | |
f73fabfd | 2881 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2882 | } else { |
f73fabfd | 2883 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2884 | } |
54d01ffb DG |
2885 | } |
2886 | ||
2f77fc4b | 2887 | |
54d01ffb | 2888 | /* |
2f77fc4b DG |
2889 | * Copy consumer output from the tracing session to the domain session. The |
2890 | * function also applies the right modification on a per domain basis for the | |
2891 | * trace files destination directory. | |
36b588ed MD |
2892 | * |
2893 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2894 | */ |
2f77fc4b | 2895 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2896 | { |
2897 | int ret; | |
2f77fc4b DG |
2898 | const char *dir_name; |
2899 | struct consumer_output *consumer; | |
2900 | ||
2901 | assert(session); | |
2902 | assert(session->consumer); | |
54d01ffb | 2903 | |
b551a063 DG |
2904 | switch (domain) { |
2905 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2906 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2907 | /* |
2908 | * XXX: We should audit the session creation and what this function | |
2909 | * does "extra" in order to avoid a destroy since this function is used | |
2910 | * in the domain session creation (kernel and ust) only. Same for UST | |
2911 | * domain. | |
2912 | */ | |
2913 | if (session->kernel_session->consumer) { | |
6addfa37 | 2914 | consumer_output_put(session->kernel_session->consumer); |
09a90bcd | 2915 | } |
2f77fc4b DG |
2916 | session->kernel_session->consumer = |
2917 | consumer_copy_output(session->consumer); | |
2918 | /* Ease our life a bit for the next part */ | |
2919 | consumer = session->kernel_session->consumer; | |
2920 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2921 | break; |
f20baf8e | 2922 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2923 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2924 | case LTTNG_DOMAIN_PYTHON: |
b551a063 | 2925 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2926 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd | 2927 | if (session->ust_session->consumer) { |
6addfa37 | 2928 | consumer_output_put(session->ust_session->consumer); |
09a90bcd | 2929 | } |
2f77fc4b DG |
2930 | session->ust_session->consumer = |
2931 | consumer_copy_output(session->consumer); | |
2932 | /* Ease our life a bit for the next part */ | |
2933 | consumer = session->ust_session->consumer; | |
2934 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2935 | break; |
2936 | default: | |
f73fabfd | 2937 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2938 | goto error; |
2939 | } | |
2940 | ||
2f77fc4b | 2941 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2942 | strncat(consumer->subdir, dir_name, |
2943 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2944 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2945 | ||
f73fabfd | 2946 | ret = LTTNG_OK; |
54d01ffb DG |
2947 | |
2948 | error: | |
2949 | return ret; | |
2950 | } | |
2951 | ||
00e2e675 | 2952 | /* |
2f77fc4b | 2953 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2954 | * |
2955 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2956 | */ |
2f77fc4b DG |
2957 | static int create_ust_session(struct ltt_session *session, |
2958 | struct lttng_domain *domain) | |
00e2e675 DG |
2959 | { |
2960 | int ret; | |
2f77fc4b | 2961 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2962 | |
a4b92340 | 2963 | assert(session); |
2f77fc4b DG |
2964 | assert(domain); |
2965 | assert(session->consumer); | |
a4b92340 | 2966 | |
2f77fc4b | 2967 | switch (domain->type) { |
f20baf8e | 2968 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2969 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2970 | case LTTNG_DOMAIN_PYTHON: |
2f77fc4b DG |
2971 | case LTTNG_DOMAIN_UST: |
2972 | break; | |
2973 | default: | |
2974 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2975 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2976 | goto error; |
2977 | } | |
2978 | ||
2f77fc4b DG |
2979 | DBG("Creating UST session"); |
2980 | ||
dec56f6c | 2981 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2982 | if (lus == NULL) { |
f73fabfd | 2983 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2984 | goto error; |
2985 | } | |
2986 | ||
2f77fc4b DG |
2987 | lus->uid = session->uid; |
2988 | lus->gid = session->gid; | |
2bba9e53 | 2989 | lus->output_traces = session->output_traces; |
27babd3a | 2990 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2991 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2992 | session->ust_session = lus; |
d7ba1388 | 2993 | if (session->shm_path[0]) { |
3d071855 MD |
2994 | strncpy(lus->root_shm_path, session->shm_path, |
2995 | sizeof(lus->root_shm_path)); | |
2996 | lus->root_shm_path[sizeof(lus->root_shm_path) - 1] = '\0'; | |
d7ba1388 MD |
2997 | strncpy(lus->shm_path, session->shm_path, |
2998 | sizeof(lus->shm_path)); | |
2999 | lus->shm_path[sizeof(lus->shm_path) - 1] = '\0'; | |
3000 | strncat(lus->shm_path, "/ust", | |
3001 | sizeof(lus->shm_path) - strlen(lus->shm_path) - 1); | |
3002 | } | |
2f77fc4b DG |
3003 | /* Copy session output to the newly created UST session */ |
3004 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 3005 | if (ret != LTTNG_OK) { |
00e2e675 DG |
3006 | goto error; |
3007 | } | |
3008 | ||
f73fabfd | 3009 | return LTTNG_OK; |
00e2e675 DG |
3010 | |
3011 | error: | |
2f77fc4b DG |
3012 | free(lus); |
3013 | session->ust_session = NULL; | |
00e2e675 DG |
3014 | return ret; |
3015 | } | |
3016 | ||
3017 | /* | |
2f77fc4b | 3018 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 3019 | */ |
2f77fc4b | 3020 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
3021 | { |
3022 | int ret; | |
a4b92340 | 3023 | |
2f77fc4b | 3024 | DBG("Creating kernel session"); |
00e2e675 | 3025 | |
2f77fc4b DG |
3026 | ret = kernel_create_session(session, kernel_tracer_fd); |
3027 | if (ret < 0) { | |
f73fabfd | 3028 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
3029 | goto error; |
3030 | } | |
3031 | ||
2f77fc4b DG |
3032 | /* Code flow safety */ |
3033 | assert(session->kernel_session); | |
3034 | ||
3035 | /* Copy session output to the newly created Kernel session */ | |
3036 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 3037 | if (ret != LTTNG_OK) { |
a4b92340 DG |
3038 | goto error; |
3039 | } | |
3040 | ||
2f77fc4b DG |
3041 | /* Create directory(ies) on local filesystem. */ |
3042 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
04350e94 | 3043 | strlen(session->kernel_session->consumer->dst.session_root_path) > 0) { |
2f77fc4b | 3044 | ret = run_as_mkdir_recursive( |
04350e94 | 3045 | session->kernel_session->consumer->dst.session_root_path, |
2f77fc4b DG |
3046 | S_IRWXU | S_IRWXG, session->uid, session->gid); |
3047 | if (ret < 0) { | |
df5b86c8 | 3048 | if (errno != EEXIST) { |
2f77fc4b | 3049 | ERR("Trace directory creation error"); |
00e2e675 DG |
3050 | goto error; |
3051 | } | |
00e2e675 | 3052 | } |
2f77fc4b | 3053 | } |
00e2e675 | 3054 | |
2f77fc4b DG |
3055 | session->kernel_session->uid = session->uid; |
3056 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 3057 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 3058 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 3059 | |
f73fabfd | 3060 | return LTTNG_OK; |
00e2e675 | 3061 | |
2f77fc4b DG |
3062 | error: |
3063 | trace_kernel_destroy_session(session->kernel_session); | |
3064 | session->kernel_session = NULL; | |
3065 | return ret; | |
3066 | } | |
00e2e675 | 3067 | |
2f77fc4b DG |
3068 | /* |
3069 | * Count number of session permitted by uid/gid. | |
3070 | */ | |
3071 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
3072 | { | |
3073 | unsigned int i = 0; | |
3074 | struct ltt_session *session; | |
07424f16 | 3075 | |
2f77fc4b DG |
3076 | DBG("Counting number of available session for UID %d GID %d", |
3077 | uid, gid); | |
3078 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 3079 | /* |
2f77fc4b | 3080 | * Only list the sessions the user can control. |
00e2e675 | 3081 | */ |
2f77fc4b DG |
3082 | if (!session_access_ok(session, uid, gid)) { |
3083 | continue; | |
3084 | } | |
3085 | i++; | |
a4b92340 | 3086 | } |
2f77fc4b | 3087 | return i; |
00e2e675 DG |
3088 | } |
3089 | ||
54d01ffb DG |
3090 | /* |
3091 | * Process the command requested by the lttng client within the command | |
3092 | * context structure. This function make sure that the return structure (llm) | |
3093 | * is set and ready for transmission before returning. | |
3094 | * | |
3095 | * Return any error encountered or 0 for success. | |
53a80697 MD |
3096 | * |
3097 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
3098 | * |
3099 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 3100 | */ |
53a80697 MD |
3101 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
3102 | int *sock_error) | |
54d01ffb | 3103 | { |
f73fabfd | 3104 | int ret = LTTNG_OK; |
44d3bd01 | 3105 | int need_tracing_session = 1; |
2e09ba09 | 3106 | int need_domain; |
54d01ffb DG |
3107 | |
3108 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
3109 | ||
3745d315 MD |
3110 | assert(!rcu_read_ongoing()); |
3111 | ||
53a80697 MD |
3112 | *sock_error = 0; |
3113 | ||
2e09ba09 MD |
3114 | switch (cmd_ctx->lsm->cmd_type) { |
3115 | case LTTNG_CREATE_SESSION: | |
27babd3a | 3116 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 3117 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
3118 | case LTTNG_DESTROY_SESSION: |
3119 | case LTTNG_LIST_SESSIONS: | |
3120 | case LTTNG_LIST_DOMAINS: | |
3121 | case LTTNG_START_TRACE: | |
3122 | case LTTNG_STOP_TRACE: | |
6d805429 | 3123 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
3124 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3125 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3126 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3127 | case LTTNG_SNAPSHOT_RECORD: | |
fb198a11 | 3128 | case LTTNG_SAVE_SESSION: |
d7ba1388 | 3129 | case LTTNG_SET_SESSION_SHM_PATH: |
eded6438 | 3130 | case LTTNG_REGENERATE_METADATA: |
c2561365 | 3131 | case LTTNG_REGENERATE_STATEDUMP: |
b3530820 JG |
3132 | case LTTNG_REGISTER_TRIGGER: |
3133 | case LTTNG_UNREGISTER_TRIGGER: | |
6e0be6cc JD |
3134 | case LTTNG_ROTATE_SESSION: |
3135 | case LTTNG_ROTATE_PENDING: | |
2e09ba09 | 3136 | need_domain = 0; |
3aace903 | 3137 | break; |
2e09ba09 MD |
3138 | default: |
3139 | need_domain = 1; | |
3140 | } | |
3141 | ||
3142 | if (opt_no_kernel && need_domain | |
3143 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 3144 | if (!is_root) { |
f73fabfd | 3145 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 3146 | } else { |
f73fabfd | 3147 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 3148 | } |
4fba7219 DG |
3149 | goto error; |
3150 | } | |
3151 | ||
8d3113b2 DG |
3152 | /* Deny register consumer if we already have a spawned consumer. */ |
3153 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
3154 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
3155 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 3156 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 3157 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
3158 | goto error; |
3159 | } | |
3160 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
3161 | } | |
3162 | ||
54d01ffb DG |
3163 | /* |
3164 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 3165 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
3166 | * command. |
3167 | */ | |
3168 | switch(cmd_ctx->lsm->cmd_type) { | |
3169 | case LTTNG_LIST_SESSIONS: | |
3170 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 3171 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
3172 | case LTTNG_LIST_DOMAINS: |
3173 | case LTTNG_LIST_CHANNELS: | |
3174 | case LTTNG_LIST_EVENTS: | |
834978fd | 3175 | case LTTNG_LIST_SYSCALLS: |
a5dfbb9d | 3176 | case LTTNG_LIST_TRACKER_PIDS: |
5cd0780d | 3177 | case LTTNG_DATA_PENDING: |
6e0be6cc JD |
3178 | case LTTNG_ROTATE_SESSION: |
3179 | case LTTNG_ROTATE_PENDING: | |
54d01ffb DG |
3180 | break; |
3181 | default: | |
3182 | /* Setup lttng message with no payload */ | |
6e10c9b9 | 3183 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0); |
54d01ffb DG |
3184 | if (ret < 0) { |
3185 | /* This label does not try to unlock the session */ | |
3186 | goto init_setup_error; | |
3187 | } | |
3188 | } | |
3189 | ||
3190 | /* Commands that DO NOT need a session. */ | |
3191 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 3192 | case LTTNG_CREATE_SESSION: |
27babd3a | 3193 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 3194 | case LTTNG_CREATE_SESSION_LIVE: |
54d01ffb DG |
3195 | case LTTNG_LIST_SESSIONS: |
3196 | case LTTNG_LIST_TRACEPOINTS: | |
834978fd | 3197 | case LTTNG_LIST_SYSCALLS: |
f37d259d | 3198 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
fb198a11 | 3199 | case LTTNG_SAVE_SESSION: |
b3530820 JG |
3200 | case LTTNG_REGISTER_TRIGGER: |
3201 | case LTTNG_UNREGISTER_TRIGGER: | |
44d3bd01 | 3202 | need_tracing_session = 0; |
54d01ffb DG |
3203 | break; |
3204 | default: | |
3205 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
3206 | /* |
3207 | * We keep the session list lock across _all_ commands | |
3208 | * for now, because the per-session lock does not | |
3209 | * handle teardown properly. | |
3210 | */ | |
74babd95 | 3211 | session_lock_list(); |
54d01ffb DG |
3212 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
3213 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 3214 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
3215 | goto error; |
3216 | } else { | |
3217 | /* Acquire lock for the session */ | |
3218 | session_lock(cmd_ctx->session); | |
3219 | } | |
3220 | break; | |
3221 | } | |
b389abbe | 3222 | |
5f3ecf22 DG |
3223 | /* |
3224 | * Commands that need a valid session but should NOT create one if none | |
3225 | * exists. Instead of creating one and destroying it when the command is | |
3226 | * handled, process that right before so we save some round trip in useless | |
3227 | * code path. | |
3228 | */ | |
3229 | switch (cmd_ctx->lsm->cmd_type) { | |
3230 | case LTTNG_DISABLE_CHANNEL: | |
3231 | case LTTNG_DISABLE_EVENT: | |
5f3ecf22 DG |
3232 | switch (cmd_ctx->lsm->domain.type) { |
3233 | case LTTNG_DOMAIN_KERNEL: | |
3234 | if (!cmd_ctx->session->kernel_session) { | |
3235 | ret = LTTNG_ERR_NO_CHANNEL; | |
3236 | goto error; | |
3237 | } | |
3238 | break; | |
3239 | case LTTNG_DOMAIN_JUL: | |
5cdb6027 | 3240 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3241 | case LTTNG_DOMAIN_PYTHON: |
5f3ecf22 DG |
3242 | case LTTNG_DOMAIN_UST: |
3243 | if (!cmd_ctx->session->ust_session) { | |
3244 | ret = LTTNG_ERR_NO_CHANNEL; | |
3245 | goto error; | |
3246 | } | |
3247 | break; | |
3248 | default: | |
3249 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3250 | goto error; | |
3251 | } | |
3252 | default: | |
3253 | break; | |
3254 | } | |
3255 | ||
2e09ba09 MD |
3256 | if (!need_domain) { |
3257 | goto skip_domain; | |
3258 | } | |
a4b92340 | 3259 | |
54d01ffb DG |
3260 | /* |
3261 | * Check domain type for specific "pre-action". | |
3262 | */ | |
3263 | switch (cmd_ctx->lsm->domain.type) { | |
3264 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 3265 | if (!is_root) { |
f73fabfd | 3266 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
3267 | goto error; |
3268 | } | |
3269 | ||
54d01ffb | 3270 | /* Kernel tracer check */ |
a4b35e07 | 3271 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3272 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3273 | ret = init_kernel_tracer(); |
3274 | if (ret != 0) { | |
54d01ffb DG |
3275 | goto error; |
3276 | } | |
3277 | } | |
5eb91c98 | 3278 | |
5c827ce0 DG |
3279 | /* Consumer is in an ERROR state. Report back to client */ |
3280 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3281 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3282 | goto error; |
3283 | } | |
3284 | ||
54d01ffb | 3285 | /* Need a session for kernel command */ |
44d3bd01 | 3286 | if (need_tracing_session) { |
54d01ffb | 3287 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3288 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3289 | if (ret < 0) { |
f73fabfd | 3290 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
3291 | goto error; |
3292 | } | |
b389abbe | 3293 | } |
7d29a247 | 3294 | |
54d01ffb | 3295 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3296 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3297 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 3298 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3299 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3300 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3301 | if (ret < 0) { |
f73fabfd | 3302 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 3303 | goto error; |
950131af | 3304 | } |
5c827ce0 | 3305 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
3306 | } else { |
3307 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3308 | } |
173af62f | 3309 | |
a4b92340 DG |
3310 | /* |
3311 | * The consumer was just spawned so we need to add the socket to | |
3312 | * the consumer output of the session if exist. | |
3313 | */ | |
3314 | ret = consumer_create_socket(&kconsumer_data, | |
3315 | cmd_ctx->session->kernel_session->consumer); | |
3316 | if (ret < 0) { | |
3317 | goto error; | |
173af62f | 3318 | } |
0d0c377a | 3319 | } |
5c827ce0 | 3320 | |
54d01ffb | 3321 | break; |
b9dfb167 | 3322 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3323 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3324 | case LTTNG_DOMAIN_PYTHON: |
2bdd86d4 | 3325 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3326 | { |
b51ec5b4 MD |
3327 | if (!ust_app_supported()) { |
3328 | ret = LTTNG_ERR_NO_UST; | |
3329 | goto error; | |
3330 | } | |
5c827ce0 DG |
3331 | /* Consumer is in an ERROR state. Report back to client */ |
3332 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3333 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3334 | goto error; |
3335 | } | |
3336 | ||
44d3bd01 | 3337 | if (need_tracing_session) { |
a4b92340 | 3338 | /* Create UST session if none exist. */ |
f6a9efaa | 3339 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3340 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3341 | &cmd_ctx->lsm->domain); |
f73fabfd | 3342 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
3343 | goto error; |
3344 | } | |
3345 | } | |
00e2e675 | 3346 | |
7753dea8 MD |
3347 | /* Start the UST consumer daemons */ |
3348 | /* 64-bit */ | |
3349 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 3350 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 3351 | ustconsumer64_data.pid == 0 && |
785d2d0d | 3352 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3353 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3354 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3355 | if (ret < 0) { |
f73fabfd | 3356 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 3357 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
3358 | goto error; |
3359 | } | |
48842b30 | 3360 | |
173af62f | 3361 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 3362 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3363 | } else { |
7753dea8 MD |
3364 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3365 | } | |
173af62f DG |
3366 | |
3367 | /* | |
3368 | * Setup socket for consumer 64 bit. No need for atomic access | |
3369 | * since it was set above and can ONLY be set in this thread. | |
3370 | */ | |
a4b92340 DG |
3371 | ret = consumer_create_socket(&ustconsumer64_data, |
3372 | cmd_ctx->session->ust_session->consumer); | |
3373 | if (ret < 0) { | |
3374 | goto error; | |
173af62f DG |
3375 | } |
3376 | ||
7753dea8 | 3377 | /* 32-bit */ |
385b881b | 3378 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); |
fc7a59ce | 3379 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 3380 | ustconsumer32_data.pid == 0 && |
785d2d0d | 3381 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3382 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
3383 | ret = start_consumerd(&ustconsumer32_data); | |
3384 | if (ret < 0) { | |
f73fabfd | 3385 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 3386 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
3387 | goto error; |
3388 | } | |
5c827ce0 | 3389 | |
173af62f | 3390 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 3391 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3392 | } else { |
3393 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3394 | } |
173af62f DG |
3395 | |
3396 | /* | |
3397 | * Setup socket for consumer 64 bit. No need for atomic access | |
3398 | * since it was set above and can ONLY be set in this thread. | |
3399 | */ | |
a4b92340 DG |
3400 | ret = consumer_create_socket(&ustconsumer32_data, |
3401 | cmd_ctx->session->ust_session->consumer); | |
3402 | if (ret < 0) { | |
3403 | goto error; | |
173af62f | 3404 | } |
44d3bd01 DG |
3405 | } |
3406 | break; | |
48842b30 | 3407 | } |
54d01ffb | 3408 | default: |
54d01ffb DG |
3409 | break; |
3410 | } | |
2e09ba09 | 3411 | skip_domain: |
33a2b854 | 3412 | |
5c827ce0 DG |
3413 | /* Validate consumer daemon state when start/stop trace command */ |
3414 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3415 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3416 | switch (cmd_ctx->lsm->domain.type) { | |
e7619875 JG |
3417 | case LTTNG_DOMAIN_NONE: |
3418 | break; | |
b9dfb167 | 3419 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3420 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3421 | case LTTNG_DOMAIN_PYTHON: |
5c827ce0 DG |
3422 | case LTTNG_DOMAIN_UST: |
3423 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3424 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3425 | goto error; |
3426 | } | |
3427 | break; | |
3428 | case LTTNG_DOMAIN_KERNEL: | |
3429 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3430 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3431 | goto error; |
3432 | } | |
3433 | break; | |
825535cc JG |
3434 | default: |
3435 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3436 | goto error; | |
5c827ce0 DG |
3437 | } |
3438 | } | |
3439 | ||
8e0af1b4 MD |
3440 | /* |
3441 | * Check that the UID or GID match that of the tracing session. | |
3442 | * The root user can interact with all sessions. | |
3443 | */ | |
3444 | if (need_tracing_session) { | |
3445 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3446 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3447 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 3448 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
3449 | goto error; |
3450 | } | |
3451 | } | |
3452 | ||
ffe60014 DG |
3453 | /* |
3454 | * Send relayd information to consumer as soon as we have a domain and a | |
3455 | * session defined. | |
3456 | */ | |
3457 | if (cmd_ctx->session && need_domain) { | |
3458 | /* | |
3459 | * Setup relayd if not done yet. If the relayd information was already | |
3460 | * sent to the consumer, this call will gracefully return. | |
3461 | */ | |
3462 | ret = cmd_setup_relayd(cmd_ctx->session); | |
3463 | if (ret != LTTNG_OK) { | |
3464 | goto error; | |
3465 | } | |
3466 | } | |
3467 | ||
54d01ffb DG |
3468 | /* Process by command type */ |
3469 | switch (cmd_ctx->lsm->cmd_type) { | |
3470 | case LTTNG_ADD_CONTEXT: | |
3471 | { | |
2001793c JG |
3472 | /* |
3473 | * An LTTNG_ADD_CONTEXT command might have a supplementary | |
3474 | * payload if the context being added is an application context. | |
3475 | */ | |
3476 | if (cmd_ctx->lsm->u.context.ctx.ctx == | |
3477 | LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
3478 | char *provider_name = NULL, *context_name = NULL; | |
3479 | size_t provider_name_len = | |
3480 | cmd_ctx->lsm->u.context.provider_name_len; | |
3481 | size_t context_name_len = | |
3482 | cmd_ctx->lsm->u.context.context_name_len; | |
3483 | ||
3484 | if (provider_name_len == 0 || context_name_len == 0) { | |
3485 | /* | |
3486 | * Application provider and context names MUST | |
3487 | * be provided. | |
3488 | */ | |
3489 | ret = -LTTNG_ERR_INVALID; | |
3490 | goto error; | |
3491 | } | |
3492 | ||
3493 | provider_name = zmalloc(provider_name_len + 1); | |
3494 | if (!provider_name) { | |
3495 | ret = -LTTNG_ERR_NOMEM; | |
3496 | goto error; | |
3497 | } | |
e0f4d107 JG |
3498 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = |
3499 | provider_name; | |
2001793c JG |
3500 | |
3501 | context_name = zmalloc(context_name_len + 1); | |
3502 | if (!context_name) { | |
3503 | ret = -LTTNG_ERR_NOMEM; | |
3504 | goto error_add_context; | |
3505 | } | |
e0f4d107 JG |
3506 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = |
3507 | context_name; | |
2001793c JG |
3508 | |
3509 | ret = lttcomm_recv_unix_sock(sock, provider_name, | |
3510 | provider_name_len); | |
3511 | if (ret < 0) { | |
3512 | goto error_add_context; | |
3513 | } | |
3514 | ||
3515 | ret = lttcomm_recv_unix_sock(sock, context_name, | |
3516 | context_name_len); | |
3517 | if (ret < 0) { | |
3518 | goto error_add_context; | |
3519 | } | |
2001793c JG |
3520 | } |
3521 | ||
3522 | /* | |
3523 | * cmd_add_context assumes ownership of the provider and context | |
3524 | * names. | |
3525 | */ | |
3526 | ret = cmd_add_context(cmd_ctx->session, | |
3527 | cmd_ctx->lsm->domain.type, | |
54d01ffb | 3528 | cmd_ctx->lsm->u.context.channel_name, |
2001793c JG |
3529 | &cmd_ctx->lsm->u.context.ctx, |
3530 | kernel_poll_pipe[1]); | |
3531 | ||
3532 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = NULL; | |
3533 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = NULL; | |
3534 | error_add_context: | |
3535 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name); | |
3536 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name); | |
3537 | if (ret < 0) { | |
3538 | goto error; | |
3539 | } | |
54d01ffb DG |
3540 | break; |
3541 | } | |
3542 | case LTTNG_DISABLE_CHANNEL: | |
3543 | { | |
3544 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3545 | cmd_ctx->lsm->u.disable.channel_name); | |
3546 | break; | |
3547 | } | |
3548 | case LTTNG_DISABLE_EVENT: | |
3549 | { | |
47b7e2f9 JG |
3550 | |
3551 | /* | |
3552 | * FIXME: handle filter; for now we just receive the filter's | |
3553 | * bytecode along with the filter expression which are sent by | |
3554 | * liblttng-ctl and discard them. | |
3555 | * | |
3556 | * This fixes an issue where the client may block while sending | |
3557 | * the filter payload and encounter an error because the session | |
3558 | * daemon closes the socket without ever handling this data. | |
3559 | */ | |
3560 | size_t count = cmd_ctx->lsm->u.disable.expression_len + | |
3561 | cmd_ctx->lsm->u.disable.bytecode_len; | |
3562 | ||
3563 | if (count) { | |
3564 | char data[LTTNG_FILTER_MAX_LEN]; | |
3565 | ||
3566 | DBG("Discarding disable event command payload of size %zu", count); | |
3567 | while (count) { | |
3568 | ret = lttcomm_recv_unix_sock(sock, data, | |
3569 | count > sizeof(data) ? sizeof(data) : count); | |
3570 | if (ret < 0) { | |
3571 | goto error; | |
3572 | } | |
3573 | ||
3574 | count -= (size_t) ret; | |
3575 | } | |
3576 | } | |
6e911cad | 3577 | /* FIXME: passing packed structure to non-packed pointer */ |
54d01ffb DG |
3578 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3579 | cmd_ctx->lsm->u.disable.channel_name, | |
6e911cad | 3580 | &cmd_ctx->lsm->u.disable.event); |
33a2b854 DG |
3581 | break; |
3582 | } | |
54d01ffb DG |
3583 | case LTTNG_ENABLE_CHANNEL: |
3584 | { | |
b3530820 JG |
3585 | cmd_ctx->lsm->u.channel.chan.attr.extended.ptr = |
3586 | (struct lttng_channel_extended *) &cmd_ctx->lsm->u.channel.extended; | |
7972aab2 | 3587 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
b3530820 JG |
3588 | &cmd_ctx->lsm->u.channel.chan, |
3589 | kernel_poll_pipe[1]); | |
54d01ffb DG |
3590 | break; |
3591 | } | |
ccf10263 MD |
3592 | case LTTNG_TRACK_PID: |
3593 | { | |
3594 | ret = cmd_track_pid(cmd_ctx->session, | |
3595 | cmd_ctx->lsm->domain.type, | |
3596 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3597 | break; | |
3598 | } | |
3599 | case LTTNG_UNTRACK_PID: | |
3600 | { | |
3601 | ret = cmd_untrack_pid(cmd_ctx->session, | |
3602 | cmd_ctx->lsm->domain.type, | |
3603 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3604 | break; | |
3605 | } | |
54d01ffb DG |
3606 | case LTTNG_ENABLE_EVENT: |
3607 | { | |
882ef835 JI |
3608 | struct lttng_event_exclusion *exclusion = NULL; |
3609 | struct lttng_filter_bytecode *bytecode = NULL; | |
6b453b5e | 3610 | char *filter_expression = NULL; |
882ef835 | 3611 | |
67676bd8 DG |
3612 | /* Handle exclusion events and receive it from the client. */ |
3613 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3614 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3615 | ||
3616 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3617 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3618 | if (!exclusion) { | |
3619 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3620 | goto error; | |
882ef835 | 3621 | } |
882ef835 | 3622 | |
67676bd8 DG |
3623 | DBG("Receiving var len exclusion event list from client ..."); |
3624 | exclusion->count = count; | |
3625 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3626 | count * LTTNG_SYMBOL_NAME_LEN); | |
3627 | if (ret <= 0) { | |
3628 | DBG("Nothing recv() from client var len data... continuing"); | |
3629 | *sock_error = 1; | |
3630 | free(exclusion); | |
3631 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3632 | goto error; | |
3633 | } | |
3634 | } | |
3635 | ||
6b453b5e JG |
3636 | /* Get filter expression from client. */ |
3637 | if (cmd_ctx->lsm->u.enable.expression_len > 0) { | |
3638 | size_t expression_len = | |
3639 | cmd_ctx->lsm->u.enable.expression_len; | |
3640 | ||
3641 | if (expression_len > LTTNG_FILTER_MAX_LEN) { | |
3642 | ret = LTTNG_ERR_FILTER_INVAL; | |
3643 | free(exclusion); | |
3644 | goto error; | |
3645 | } | |
3646 | ||
3647 | filter_expression = zmalloc(expression_len); | |
3648 | if (!filter_expression) { | |
3649 | free(exclusion); | |
3650 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3651 | goto error; | |
3652 | } | |
3653 | ||
3654 | /* Receive var. len. data */ | |
3655 | DBG("Receiving var len filter's expression from client ..."); | |
3656 | ret = lttcomm_recv_unix_sock(sock, filter_expression, | |
3657 | expression_len); | |
3658 | if (ret <= 0) { | |
3659 | DBG("Nothing recv() from client car len data... continuing"); | |
3660 | *sock_error = 1; | |
3661 | free(filter_expression); | |
3662 | free(exclusion); | |
3663 | ret = LTTNG_ERR_FILTER_INVAL; | |
3664 | goto error; | |
3665 | } | |
3666 | } | |
3667 | ||
67676bd8 DG |
3668 | /* Handle filter and get bytecode from client. */ |
3669 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3670 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3671 | ||
3672 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3673 | ret = LTTNG_ERR_FILTER_INVAL; | |
49d21f93 | 3674 | free(filter_expression); |
67676bd8 DG |
3675 | free(exclusion); |
3676 | goto error; | |
3677 | } | |
3678 | ||
3679 | bytecode = zmalloc(bytecode_len); | |
3680 | if (!bytecode) { | |
49d21f93 | 3681 | free(filter_expression); |
67676bd8 DG |
3682 | free(exclusion); |
3683 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3684 | goto error; | |
882ef835 JI |
3685 | } |
3686 | ||
67676bd8 DG |
3687 | /* Receive var. len. data */ |
3688 | DBG("Receiving var len filter's bytecode from client ..."); | |
3689 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3690 | if (ret <= 0) { | |
3691 | DBG("Nothing recv() from client car len data... continuing"); | |
3692 | *sock_error = 1; | |
49d21f93 | 3693 | free(filter_expression); |
67676bd8 DG |
3694 | free(bytecode); |
3695 | free(exclusion); | |
3696 | ret = LTTNG_ERR_FILTER_INVAL; | |
3697 | goto error; | |
3698 | } | |
3699 | ||
3700 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
49d21f93 | 3701 | free(filter_expression); |
67676bd8 DG |
3702 | free(bytecode); |
3703 | free(exclusion); | |
3704 | ret = LTTNG_ERR_FILTER_INVAL; | |
3705 | goto error; | |
3706 | } | |
882ef835 | 3707 | } |
67676bd8 DG |
3708 | |
3709 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3710 | cmd_ctx->lsm->u.enable.channel_name, | |
6b453b5e JG |
3711 | &cmd_ctx->lsm->u.enable.event, |
3712 | filter_expression, bytecode, exclusion, | |
67676bd8 | 3713 | kernel_poll_pipe[1]); |
54d01ffb DG |
3714 | break; |
3715 | } | |
052da939 | 3716 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3717 | { |
9f19cc17 | 3718 | struct lttng_event *events; |
54d01ffb | 3719 | ssize_t nb_events; |
052da939 | 3720 | |
0845bbfa | 3721 | session_lock_list(); |
54d01ffb | 3722 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
0845bbfa | 3723 | session_unlock_list(); |
54d01ffb | 3724 | if (nb_events < 0) { |
f73fabfd | 3725 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3726 | ret = -nb_events; |
3727 | goto error; | |
2ef84c95 DG |
3728 | } |
3729 | ||
3730 | /* | |
3731 | * Setup lttng message with payload size set to the event list size in | |
3732 | * bytes and then copy list into the llm payload. | |
3733 | */ | |
6e10c9b9 PP |
3734 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3735 | sizeof(struct lttng_event) * nb_events); | |
3736 | free(events); | |
3737 | ||
2ef84c95 DG |
3738 | if (ret < 0) { |
3739 | goto setup_error; | |
3740 | } | |
3741 | ||
f73fabfd | 3742 | ret = LTTNG_OK; |
2ef84c95 DG |
3743 | break; |
3744 | } | |
f37d259d MD |
3745 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3746 | { | |
3747 | struct lttng_event_field *fields; | |
3748 | ssize_t nb_fields; | |
3749 | ||
0845bbfa | 3750 | session_lock_list(); |
a4b92340 DG |
3751 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3752 | &fields); | |
0845bbfa | 3753 | session_unlock_list(); |
f37d259d | 3754 | if (nb_fields < 0) { |
f73fabfd | 3755 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3756 | ret = -nb_fields; |
3757 | goto error; | |
3758 | } | |
3759 | ||
3760 | /* | |
3761 | * Setup lttng message with payload size set to the event list size in | |
3762 | * bytes and then copy list into the llm payload. | |
3763 | */ | |
6e10c9b9 | 3764 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, fields, |
a4b92340 | 3765 | sizeof(struct lttng_event_field) * nb_fields); |
6e10c9b9 PP |
3766 | free(fields); |
3767 | ||
f37d259d | 3768 | if (ret < 0) { |
f37d259d MD |
3769 | goto setup_error; |
3770 | } | |
3771 | ||
f73fabfd | 3772 | ret = LTTNG_OK; |
f37d259d MD |
3773 | break; |
3774 | } | |
834978fd DG |
3775 | case LTTNG_LIST_SYSCALLS: |
3776 | { | |
3777 | struct lttng_event *events; | |
3778 | ssize_t nb_events; | |
3779 | ||
3780 | nb_events = cmd_list_syscalls(&events); | |
3781 | if (nb_events < 0) { | |
3782 | /* Return value is a negative lttng_error_code. */ | |
3783 | ret = -nb_events; | |
3784 | goto error; | |
3785 | } | |
3786 | ||
3787 | /* | |
3788 | * Setup lttng message with payload size set to the event list size in | |
3789 | * bytes and then copy list into the llm payload. | |
3790 | */ | |
6e10c9b9 PP |
3791 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3792 | sizeof(struct lttng_event) * nb_events); | |
3793 | free(events); | |
3794 | ||
834978fd | 3795 | if (ret < 0) { |
834978fd DG |
3796 | goto setup_error; |
3797 | } | |
3798 | ||
834978fd DG |
3799 | ret = LTTNG_OK; |
3800 | break; | |
3801 | } | |
a5dfbb9d MD |
3802 | case LTTNG_LIST_TRACKER_PIDS: |
3803 | { | |
3804 | int32_t *pids = NULL; | |
3805 | ssize_t nr_pids; | |
3806 | ||
3807 | nr_pids = cmd_list_tracker_pids(cmd_ctx->session, | |
3808 | cmd_ctx->lsm->domain.type, &pids); | |
3809 | if (nr_pids < 0) { | |
3810 | /* Return value is a negative lttng_error_code. */ | |
3811 | ret = -nr_pids; | |
3812 | goto error; | |
3813 | } | |
3814 | ||
3815 | /* | |
3816 | * Setup lttng message with payload size set to the event list size in | |
3817 | * bytes and then copy list into the llm payload. | |
3818 | */ | |
6e10c9b9 PP |
3819 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, pids, |
3820 | sizeof(int32_t) * nr_pids); | |
3821 | free(pids); | |
3822 | ||
a5dfbb9d | 3823 | if (ret < 0) { |
a5dfbb9d MD |
3824 | goto setup_error; |
3825 | } | |
3826 | ||
a5dfbb9d MD |
3827 | ret = LTTNG_OK; |
3828 | break; | |
3829 | } | |
00e2e675 DG |
3830 | case LTTNG_SET_CONSUMER_URI: |
3831 | { | |
a4b92340 DG |
3832 | size_t nb_uri, len; |
3833 | struct lttng_uri *uris; | |
3834 | ||
3835 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3836 | len = nb_uri * sizeof(struct lttng_uri); | |
3837 | ||
3838 | if (nb_uri == 0) { | |
f73fabfd | 3839 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3840 | goto error; |
3841 | } | |
3842 | ||
3843 | uris = zmalloc(len); | |
3844 | if (uris == NULL) { | |
f73fabfd | 3845 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3846 | goto error; |
3847 | } | |
3848 | ||
3849 | /* Receive variable len data */ | |
77c7c900 | 3850 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3851 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3852 | if (ret <= 0) { | |
3853 | DBG("No URIs received from client... continuing"); | |
3854 | *sock_error = 1; | |
f73fabfd | 3855 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3856 | free(uris); |
a4b92340 DG |
3857 | goto error; |
3858 | } | |
3859 | ||
bda32d56 JG |
3860 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); |
3861 | free(uris); | |
f73fabfd | 3862 | if (ret != LTTNG_OK) { |
a4b92340 DG |
3863 | goto error; |
3864 | } | |
3865 | ||
b1d41407 | 3866 | |
00e2e675 DG |
3867 | break; |
3868 | } | |
f3ed775e | 3869 | case LTTNG_START_TRACE: |
8c0faa1d | 3870 | { |
54d01ffb | 3871 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3872 | break; |
3873 | } | |
f3ed775e | 3874 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3875 | { |
54d01ffb | 3876 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3877 | break; |
3878 | } | |
5e16da05 MD |
3879 | case LTTNG_CREATE_SESSION: |
3880 | { | |
a4b92340 DG |
3881 | size_t nb_uri, len; |
3882 | struct lttng_uri *uris = NULL; | |
3883 | ||
3884 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3885 | len = nb_uri * sizeof(struct lttng_uri); | |
3886 | ||
3887 | if (nb_uri > 0) { | |
3888 | uris = zmalloc(len); | |
3889 | if (uris == NULL) { | |
f73fabfd | 3890 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3891 | goto error; |
3892 | } | |
3893 | ||
3894 | /* Receive variable len data */ | |
77c7c900 | 3895 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3896 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3897 | if (ret <= 0) { | |
3898 | DBG("No URIs received from client... continuing"); | |
3899 | *sock_error = 1; | |
f73fabfd | 3900 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3901 | free(uris); |
a4b92340 DG |
3902 | goto error; |
3903 | } | |
3904 | ||
3905 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3906 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3907 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3908 | free(uris); |
a4b92340 DG |
3909 | goto error; |
3910 | } | |
3911 | } | |
3912 | ||
3913 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3914 | &cmd_ctx->creds, 0); |
a4b92340 | 3915 | |
b1d41407 DG |
3916 | free(uris); |
3917 | ||
00e2e675 DG |
3918 | break; |
3919 | } | |
5e16da05 MD |
3920 | case LTTNG_DESTROY_SESSION: |
3921 | { | |
2f77fc4b | 3922 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3923 | |
3924 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3925 | cmd_ctx->session = NULL; |
5461b305 | 3926 | break; |
5e16da05 | 3927 | } |
9f19cc17 | 3928 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3929 | { |
54d01ffb | 3930 | ssize_t nb_dom; |
fa64dfb4 | 3931 | struct lttng_domain *domains = NULL; |
5461b305 | 3932 | |
54d01ffb DG |
3933 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3934 | if (nb_dom < 0) { | |
f73fabfd | 3935 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3936 | ret = -nb_dom; |
3937 | goto error; | |
ce3d728c | 3938 | } |
520ff687 | 3939 | |
6e10c9b9 PP |
3940 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, domains, |
3941 | nb_dom * sizeof(struct lttng_domain)); | |
3942 | free(domains); | |
3943 | ||
5461b305 DG |
3944 | if (ret < 0) { |
3945 | goto setup_error; | |
520ff687 | 3946 | } |
57167058 | 3947 | |
f73fabfd | 3948 | ret = LTTNG_OK; |
5e16da05 MD |
3949 | break; |
3950 | } | |
9f19cc17 | 3951 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3952 | { |
53e367f9 | 3953 | ssize_t payload_size; |
ade7ce52 | 3954 | struct lttng_channel *channels = NULL; |
54d01ffb | 3955 | |
53e367f9 | 3956 | payload_size = cmd_list_channels(cmd_ctx->lsm->domain.type, |
b551a063 | 3957 | cmd_ctx->session, &channels); |
53e367f9 | 3958 | if (payload_size < 0) { |
f73fabfd | 3959 | /* Return value is a negative lttng_error_code. */ |
53e367f9 | 3960 | ret = -payload_size; |
54d01ffb | 3961 | goto error; |
5461b305 | 3962 | } |
ca95a216 | 3963 | |
6e10c9b9 | 3964 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, channels, |
53e367f9 | 3965 | payload_size); |
6e10c9b9 PP |
3966 | free(channels); |
3967 | ||
5461b305 DG |
3968 | if (ret < 0) { |
3969 | goto setup_error; | |
3970 | } | |
9f19cc17 | 3971 | |
f73fabfd | 3972 | ret = LTTNG_OK; |
5461b305 | 3973 | break; |
5e16da05 | 3974 | } |
9f19cc17 | 3975 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3976 | { |
b551a063 | 3977 | ssize_t nb_event; |
684d34d2 | 3978 | struct lttng_event *events = NULL; |
b4e3ceb9 PP |
3979 | struct lttcomm_event_command_header cmd_header; |
3980 | size_t total_size; | |
3981 | ||
b2d66287 | 3982 | memset(&cmd_header, 0, sizeof(cmd_header)); |
b4e3ceb9 PP |
3983 | /* Extended infos are included at the end of events */ |
3984 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, | |
3985 | cmd_ctx->session, cmd_ctx->lsm->u.list.channel_name, | |
3986 | &events, &total_size); | |
9f19cc17 | 3987 | |
54d01ffb | 3988 | if (nb_event < 0) { |
f73fabfd | 3989 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3990 | ret = -nb_event; |
3991 | goto error; | |
5461b305 | 3992 | } |
ca95a216 | 3993 | |
b4e3ceb9 PP |
3994 | cmd_header.nb_events = nb_event; |
3995 | ret = setup_lttng_msg(cmd_ctx, events, total_size, | |
3996 | &cmd_header, sizeof(cmd_header)); | |
6e10c9b9 PP |
3997 | free(events); |
3998 | ||
5461b305 DG |
3999 | if (ret < 0) { |
4000 | goto setup_error; | |
4001 | } | |
9f19cc17 | 4002 | |
f73fabfd | 4003 | ret = LTTNG_OK; |
5461b305 | 4004 | break; |
5e16da05 MD |
4005 | } |
4006 | case LTTNG_LIST_SESSIONS: | |
4007 | { | |
8e0af1b4 | 4008 | unsigned int nr_sessions; |
6e10c9b9 PP |
4009 | void *sessions_payload; |
4010 | size_t payload_len; | |
5461b305 | 4011 | |
8e0af1b4 | 4012 | session_lock_list(); |
730389d9 DG |
4013 | nr_sessions = lttng_sessions_count( |
4014 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
4015 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6e10c9b9 PP |
4016 | payload_len = sizeof(struct lttng_session) * nr_sessions; |
4017 | sessions_payload = zmalloc(payload_len); | |
d32fb093 | 4018 | |
6e10c9b9 | 4019 | if (!sessions_payload) { |
54d01ffb | 4020 | session_unlock_list(); |
6e10c9b9 | 4021 | ret = -ENOMEM; |
5461b305 | 4022 | goto setup_error; |
e065084a | 4023 | } |
5e16da05 | 4024 | |
6e10c9b9 | 4025 | cmd_list_lttng_sessions(sessions_payload, |
730389d9 DG |
4026 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
4027 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
54d01ffb | 4028 | session_unlock_list(); |
5e16da05 | 4029 | |
6e10c9b9 PP |
4030 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, sessions_payload, |
4031 | payload_len); | |
4032 | free(sessions_payload); | |
4033 | ||
4034 | if (ret < 0) { | |
4035 | goto setup_error; | |
4036 | } | |
4037 | ||
f73fabfd | 4038 | ret = LTTNG_OK; |
5e16da05 MD |
4039 | break; |
4040 | } | |
d9800920 DG |
4041 | case LTTNG_REGISTER_CONSUMER: |
4042 | { | |
2f77fc4b DG |
4043 | struct consumer_data *cdata; |
4044 | ||
4045 | switch (cmd_ctx->lsm->domain.type) { | |
4046 | case LTTNG_DOMAIN_KERNEL: | |
4047 | cdata = &kconsumer_data; | |
4048 | break; | |
4049 | default: | |
f73fabfd | 4050 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
4051 | goto error; |
4052 | } | |
4053 | ||
54d01ffb | 4054 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 4055 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
4056 | break; |
4057 | } | |
6d805429 | 4058 | case LTTNG_DATA_PENDING: |
806e2684 | 4059 | { |
f6151c55 | 4060 | int pending_ret; |
6e10c9b9 | 4061 | uint8_t pending_ret_byte; |
f6151c55 JG |
4062 | |
4063 | pending_ret = cmd_data_pending(cmd_ctx->session); | |
6e10c9b9 | 4064 | |
f6151c55 JG |
4065 | /* |
4066 | * FIXME | |
4067 | * | |
4068 | * This function may returns 0 or 1 to indicate whether or not | |
4069 | * there is data pending. In case of error, it should return an | |
4070 | * LTTNG_ERR code. However, some code paths may still return | |
4071 | * a nondescript error code, which we handle by returning an | |
4072 | * "unknown" error. | |
4073 | */ | |
4074 | if (pending_ret == 0 || pending_ret == 1) { | |
6e10c9b9 PP |
4075 | /* |
4076 | * ret will be set to LTTNG_OK at the end of | |
4077 | * this function. | |
4078 | */ | |
f6151c55 JG |
4079 | } else if (pending_ret < 0) { |
4080 | ret = LTTNG_ERR_UNK; | |
4081 | goto setup_error; | |
4082 | } else { | |
4083 | ret = pending_ret; | |
4084 | goto setup_error; | |
4085 | } | |
4086 | ||
6e10c9b9 PP |
4087 | pending_ret_byte = (uint8_t) pending_ret; |
4088 | ||
4089 | /* 1 byte to return whether or not data is pending */ | |
4090 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, | |
4091 | &pending_ret_byte, 1); | |
4092 | ||
4093 | if (ret < 0) { | |
4094 | goto setup_error; | |
4095 | } | |
4096 | ||
4097 | ret = LTTNG_OK; | |
806e2684 DG |
4098 | break; |
4099 | } | |
da3c9ec1 DG |
4100 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
4101 | { | |
6dc3064a DG |
4102 | struct lttcomm_lttng_output_id reply; |
4103 | ||
4104 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
4105 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
4106 | if (ret != LTTNG_OK) { | |
4107 | goto error; | |
4108 | } | |
4109 | ||
6e10c9b9 PP |
4110 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &reply, |
4111 | sizeof(reply)); | |
6dc3064a DG |
4112 | if (ret < 0) { |
4113 | goto setup_error; | |
4114 | } | |
4115 | ||
4116 | /* Copy output list into message payload */ | |
6dc3064a | 4117 | ret = LTTNG_OK; |
da3c9ec1 DG |
4118 | break; |
4119 | } | |
4120 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
4121 | { | |
6dc3064a DG |
4122 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
4123 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
4124 | break; |
4125 | } | |
4126 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
4127 | { | |
6dc3064a DG |
4128 | ssize_t nb_output; |
4129 | struct lttng_snapshot_output *outputs = NULL; | |
4130 | ||
4131 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
4132 | if (nb_output < 0) { | |
4133 | ret = -nb_output; | |
4134 | goto error; | |
4135 | } | |
4136 | ||
6e10c9b9 PP |
4137 | assert((nb_output > 0 && outputs) || nb_output == 0); |
4138 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, outputs, | |
6dc3064a | 4139 | nb_output * sizeof(struct lttng_snapshot_output)); |
6e10c9b9 PP |
4140 | free(outputs); |
4141 | ||
6dc3064a | 4142 | if (ret < 0) { |
6dc3064a DG |
4143 | goto setup_error; |
4144 | } | |
4145 | ||
6dc3064a | 4146 | ret = LTTNG_OK; |
da3c9ec1 DG |
4147 | break; |
4148 | } | |
4149 | case LTTNG_SNAPSHOT_RECORD: | |
4150 | { | |
6dc3064a DG |
4151 | ret = cmd_snapshot_record(cmd_ctx->session, |
4152 | &cmd_ctx->lsm->u.snapshot_record.output, | |
4153 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
4154 | break; |
4155 | } | |
27babd3a DG |
4156 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
4157 | { | |
4158 | size_t nb_uri, len; | |
4159 | struct lttng_uri *uris = NULL; | |
4160 | ||
4161 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4162 | len = nb_uri * sizeof(struct lttng_uri); | |
4163 | ||
4164 | if (nb_uri > 0) { | |
4165 | uris = zmalloc(len); | |
4166 | if (uris == NULL) { | |
4167 | ret = LTTNG_ERR_FATAL; | |
4168 | goto error; | |
4169 | } | |
4170 | ||
4171 | /* Receive variable len data */ | |
4172 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
4173 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
4174 | if (ret <= 0) { | |
4175 | DBG("No URIs received from client... continuing"); | |
4176 | *sock_error = 1; | |
4177 | ret = LTTNG_ERR_SESSION_FAIL; | |
4178 | free(uris); | |
4179 | goto error; | |
4180 | } | |
4181 | ||
4182 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4183 | DBG("Creating session with ONE network URI is a bad call"); | |
4184 | ret = LTTNG_ERR_SESSION_FAIL; | |
4185 | free(uris); | |
4186 | goto error; | |
4187 | } | |
4188 | } | |
4189 | ||
4190 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
4191 | nb_uri, &cmd_ctx->creds); | |
4192 | free(uris); | |
4193 | break; | |
4194 | } | |
ecc48a90 JD |
4195 | case LTTNG_CREATE_SESSION_LIVE: |
4196 | { | |
4197 | size_t nb_uri, len; | |
4198 | struct lttng_uri *uris = NULL; | |
4199 | ||
4200 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4201 | len = nb_uri * sizeof(struct lttng_uri); | |
4202 | ||
4203 | if (nb_uri > 0) { | |
4204 | uris = zmalloc(len); | |
4205 | if (uris == NULL) { | |
4206 | ret = LTTNG_ERR_FATAL; | |
4207 | goto error; | |
4208 | } | |
4209 | ||
4210 | /* Receive variable len data */ | |
4211 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
4212 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
4213 | if (ret <= 0) { | |
4214 | DBG("No URIs received from client... continuing"); | |
4215 | *sock_error = 1; | |
4216 | ret = LTTNG_ERR_SESSION_FAIL; | |
4217 | free(uris); | |
4218 | goto error; | |
4219 | } | |
4220 | ||
4221 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4222 | DBG("Creating session with ONE network URI is a bad call"); | |
4223 | ret = LTTNG_ERR_SESSION_FAIL; | |
4224 | free(uris); | |
4225 | goto error; | |
4226 | } | |
4227 | } | |
4228 | ||
4229 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
4230 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
4231 | free(uris); | |
4232 | break; | |
4233 | } | |
fb198a11 JG |
4234 | case LTTNG_SAVE_SESSION: |
4235 | { | |
4236 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
4237 | &cmd_ctx->creds); | |
4238 | break; | |
4239 | } | |
d7ba1388 MD |
4240 | case LTTNG_SET_SESSION_SHM_PATH: |
4241 | { | |
4242 | ret = cmd_set_session_shm_path(cmd_ctx->session, | |
4243 | cmd_ctx->lsm->u.set_shm_path.shm_path); | |
4244 | break; | |
4245 | } | |
eded6438 | 4246 | case LTTNG_REGENERATE_METADATA: |
93ec662e | 4247 | { |
eded6438 | 4248 | ret = cmd_regenerate_metadata(cmd_ctx->session); |
93ec662e JD |
4249 | break; |
4250 | } | |
c2561365 JD |
4251 | case LTTNG_REGENERATE_STATEDUMP: |
4252 | { | |
4253 | ret = cmd_regenerate_statedump(cmd_ctx->session); | |
4254 | break; | |
4255 | } | |
b3530820 JG |
4256 | case LTTNG_REGISTER_TRIGGER: |
4257 | { | |
4258 | ret = cmd_register_trigger(cmd_ctx, sock, | |
4259 | notification_thread_handle); | |
4260 | break; | |
4261 | } | |
4262 | case LTTNG_UNREGISTER_TRIGGER: | |
4263 | { | |
4264 | ret = cmd_unregister_trigger(cmd_ctx, sock, | |
4265 | notification_thread_handle); | |
4266 | break; | |
4267 | } | |
6e0be6cc JD |
4268 | case LTTNG_ROTATE_SESSION: |
4269 | { | |
4270 | struct lttng_rotate_session_return *rotate_return = NULL; | |
4271 | ||
4272 | ret = cmd_rotate_session(cmd_ctx->session, &rotate_return); | |
4273 | if (ret < 0) { | |
4274 | ret = -ret; | |
4275 | fprintf(stderr, "cmd ret: %d\n", ret); | |
4276 | goto error; | |
4277 | } | |
4278 | ||
4279 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, rotate_return, | |
4280 | sizeof(struct lttng_rotate_session_return)); | |
4281 | free(rotate_return); | |
4282 | if (ret < 0) { | |
4283 | ret = -ret; | |
4284 | goto error; | |
4285 | } | |
4286 | ||
4287 | ret = LTTNG_OK; | |
4288 | break; | |
4289 | } | |
4290 | case LTTNG_ROTATE_PENDING: | |
4291 | { | |
4292 | struct lttng_rotate_pending_return *pending_return = NULL; | |
4293 | ||
4294 | ret = cmd_rotate_pending(cmd_ctx->session, &pending_return, | |
4295 | cmd_ctx->lsm->u.rotate_pending.rotate_id); | |
4296 | if (ret < 0) { | |
4297 | ret = -ret; | |
4298 | goto error; | |
4299 | } | |
4300 | ||
4301 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, pending_return, | |
4302 | sizeof(struct lttng_rotate_session_handle)); | |
4303 | free(pending_return); | |
4304 | if (ret < 0) { | |
4305 | ret = -ret; | |
4306 | goto error; | |
4307 | } | |
4308 | ||
4309 | ret = LTTNG_OK; | |
4310 | break; | |
4311 | } | |
5e16da05 | 4312 | default: |
f73fabfd | 4313 | ret = LTTNG_ERR_UND; |
5461b305 | 4314 | break; |
fac6795d DG |
4315 | } |
4316 | ||
5461b305 | 4317 | error: |
5461b305 DG |
4318 | if (cmd_ctx->llm == NULL) { |
4319 | DBG("Missing llm structure. Allocating one."); | |
6e10c9b9 | 4320 | if (setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0) < 0) { |
5461b305 DG |
4321 | goto setup_error; |
4322 | } | |
4323 | } | |
54d01ffb | 4324 | /* Set return code */ |
5461b305 | 4325 | cmd_ctx->llm->ret_code = ret; |
6e0be6cc | 4326 | fprintf(stderr, "llm ret: %d\n", ret); |
5461b305 | 4327 | setup_error: |
b5541356 | 4328 | if (cmd_ctx->session) { |
54d01ffb | 4329 | session_unlock(cmd_ctx->session); |
b5541356 | 4330 | } |
256a5576 MD |
4331 | if (need_tracing_session) { |
4332 | session_unlock_list(); | |
4333 | } | |
54d01ffb | 4334 | init_setup_error: |
3745d315 | 4335 | assert(!rcu_read_ongoing()); |
8028d920 | 4336 | return ret; |
fac6795d DG |
4337 | } |
4338 | ||
44a5e5eb DG |
4339 | /* |
4340 | * Thread managing health check socket. | |
4341 | */ | |
4342 | static void *thread_manage_health(void *data) | |
4343 | { | |
eb4a2943 | 4344 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
4345 | uint32_t revents, nb_fd; |
4346 | struct lttng_poll_event events; | |
0c89d795 MD |
4347 | struct health_comm_msg msg; |
4348 | struct health_comm_reply reply; | |
44a5e5eb DG |
4349 | |
4350 | DBG("[thread] Manage health check started"); | |
4351 | ||
4352 | rcu_register_thread(); | |
4353 | ||
6d737ce4 DG |
4354 | /* We might hit an error path before this is created. */ |
4355 | lttng_poll_init(&events); | |
3cc04881 | 4356 | |
44a5e5eb DG |
4357 | /* Create unix socket */ |
4358 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
4359 | if (sock < 0) { | |
4360 | ERR("Unable to create health check Unix socket"); | |
44a5e5eb DG |
4361 | goto error; |
4362 | } | |
4363 | ||
6c71277b MD |
4364 | if (is_root) { |
4365 | /* lttng health client socket path permissions */ | |
4366 | ret = chown(health_unix_sock_path, 0, | |
4367 | utils_get_group_id(tracing_group_name)); | |
4368 | if (ret < 0) { | |
4369 | ERR("Unable to set group on %s", health_unix_sock_path); | |
4370 | PERROR("chown"); | |
6c71277b MD |
4371 | goto error; |
4372 | } | |
4373 | ||
4374 | ret = chmod(health_unix_sock_path, | |
4375 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4376 | if (ret < 0) { | |
4377 | ERR("Unable to set permissions on %s", health_unix_sock_path); | |
4378 | PERROR("chmod"); | |
6c71277b MD |
4379 | goto error; |
4380 | } | |
4381 | } | |
4382 | ||
b662582b DG |
4383 | /* |
4384 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4385 | * show must go on. | |
4386 | */ | |
4387 | (void) utils_set_fd_cloexec(sock); | |
4388 | ||
44a5e5eb DG |
4389 | ret = lttcomm_listen_unix_sock(sock); |
4390 | if (ret < 0) { | |
4391 | goto error; | |
4392 | } | |
4393 | ||
4394 | /* | |
4395 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4396 | * more will be added to this poll set. | |
4397 | */ | |
d0b96690 | 4398 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
4399 | if (ret < 0) { |
4400 | goto error; | |
4401 | } | |
4402 | ||
4403 | /* Add the application registration socket */ | |
4404 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
4405 | if (ret < 0) { | |
4406 | goto error; | |
4407 | } | |
4408 | ||
ef367a93 | 4409 | sessiond_notify_ready(); |
97bc1426 | 4410 | |
44a5e5eb DG |
4411 | while (1) { |
4412 | DBG("Health check ready"); | |
4413 | ||
44a5e5eb DG |
4414 | /* Inifinite blocking call, waiting for transmission */ |
4415 | restart: | |
4416 | ret = lttng_poll_wait(&events, -1); | |
4417 | if (ret < 0) { | |
4418 | /* | |
4419 | * Restart interrupted system call. | |
4420 | */ | |
4421 | if (errno == EINTR) { | |
4422 | goto restart; | |
4423 | } | |
4424 | goto error; | |
4425 | } | |
4426 | ||
0d9c5d77 DG |
4427 | nb_fd = ret; |
4428 | ||
44a5e5eb DG |
4429 | for (i = 0; i < nb_fd; i++) { |
4430 | /* Fetch once the poll data */ | |
4431 | revents = LTTNG_POLL_GETEV(&events, i); | |
4432 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4433 | ||
fd20dac9 MD |
4434 | if (!revents) { |
4435 | /* No activity for this FD (poll implementation). */ | |
4436 | continue; | |
4437 | } | |
4438 | ||
44a5e5eb | 4439 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4440 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 4441 | if (ret) { |
139ac872 MD |
4442 | err = 0; |
4443 | goto exit; | |
44a5e5eb DG |
4444 | } |
4445 | ||
4446 | /* Event on the registration socket */ | |
4447 | if (pollfd == sock) { | |
03e43155 MD |
4448 | if (revents & LPOLLIN) { |
4449 | continue; | |
4450 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
44a5e5eb DG |
4451 | ERR("Health socket poll error"); |
4452 | goto error; | |
03e43155 MD |
4453 | } else { |
4454 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4455 | goto error; | |
44a5e5eb DG |
4456 | } |
4457 | } | |
4458 | } | |
4459 | ||
4460 | new_sock = lttcomm_accept_unix_sock(sock); | |
4461 | if (new_sock < 0) { | |
4462 | goto error; | |
4463 | } | |
4464 | ||
b662582b DG |
4465 | /* |
4466 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4467 | * show must go on. | |
4468 | */ | |
4469 | (void) utils_set_fd_cloexec(new_sock); | |
4470 | ||
44a5e5eb DG |
4471 | DBG("Receiving data from client for health..."); |
4472 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
4473 | if (ret <= 0) { | |
4474 | DBG("Nothing recv() from client... continuing"); | |
4475 | ret = close(new_sock); | |
4476 | if (ret) { | |
4477 | PERROR("close"); | |
4478 | } | |
44a5e5eb DG |
4479 | continue; |
4480 | } | |
4481 | ||
4482 | rcu_thread_online(); | |
4483 | ||
53efb85a | 4484 | memset(&reply, 0, sizeof(reply)); |
6c71277b MD |
4485 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { |
4486 | /* | |
4487 | * health_check_state returns 0 if health is | |
4488 | * bad. | |
4489 | */ | |
4490 | if (!health_check_state(health_sessiond, i)) { | |
4491 | reply.ret_code |= 1ULL << i; | |
4492 | } | |
44a5e5eb DG |
4493 | } |
4494 | ||
6c71277b | 4495 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
4496 | |
4497 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
4498 | if (ret < 0) { | |
4499 | ERR("Failed to send health data back to client"); | |
4500 | } | |
4501 | ||
4502 | /* End of transmission */ | |
4503 | ret = close(new_sock); | |
4504 | if (ret) { | |
4505 | PERROR("close"); | |
4506 | } | |
44a5e5eb DG |
4507 | } |
4508 | ||
139ac872 | 4509 | exit: |
44a5e5eb | 4510 | error: |
139ac872 MD |
4511 | if (err) { |
4512 | ERR("Health error occurred in %s", __func__); | |
4513 | } | |
44a5e5eb DG |
4514 | DBG("Health check thread dying"); |
4515 | unlink(health_unix_sock_path); | |
4516 | if (sock >= 0) { | |
4517 | ret = close(sock); | |
4518 | if (ret) { | |
4519 | PERROR("close"); | |
4520 | } | |
4521 | } | |
44a5e5eb DG |
4522 | |
4523 | lttng_poll_clean(&events); | |
b11d6a7f | 4524 | stop_threads(); |
44a5e5eb DG |
4525 | rcu_unregister_thread(); |
4526 | return NULL; | |
4527 | } | |
4528 | ||
1d4b027a | 4529 | /* |
d063d709 DG |
4530 | * This thread manage all clients request using the unix client socket for |
4531 | * communication. | |
1d4b027a DG |
4532 | */ |
4533 | static void *thread_manage_clients(void *data) | |
4534 | { | |
139ac872 | 4535 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 4536 | int sock_error; |
5eb91c98 | 4537 | uint32_t revents, nb_fd; |
273ea72c | 4538 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 4539 | struct lttng_poll_event events; |
1d4b027a DG |
4540 | |
4541 | DBG("[thread] Manage client started"); | |
4542 | ||
f6a9efaa DG |
4543 | rcu_register_thread(); |
4544 | ||
6c71277b | 4545 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 4546 | |
840cb59c | 4547 | health_code_update(); |
44a5e5eb | 4548 | |
1d4b027a DG |
4549 | ret = lttcomm_listen_unix_sock(client_sock); |
4550 | if (ret < 0) { | |
35df2755 | 4551 | goto error_listen; |
1d4b027a DG |
4552 | } |
4553 | ||
5eb91c98 DG |
4554 | /* |
4555 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4556 | * more will be added to this poll set. | |
4557 | */ | |
d0b96690 | 4558 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 4559 | if (ret < 0) { |
35df2755 | 4560 | goto error_create_poll; |
5eb91c98 | 4561 | } |
273ea72c | 4562 | |
5eb91c98 DG |
4563 | /* Add the application registration socket */ |
4564 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
4565 | if (ret < 0) { | |
4566 | goto error; | |
4567 | } | |
273ea72c | 4568 | |
ef367a93 JG |
4569 | sessiond_notify_ready(); |
4570 | ret = sem_post(&load_info->message_thread_ready); | |
4571 | if (ret) { | |
4572 | PERROR("sem_post message_thread_ready"); | |
4573 | goto error; | |
4574 | } | |
0bb7724a | 4575 | |
72453c8c MD |
4576 | /* This testpoint is after we signal readiness to the parent. */ |
4577 | if (testpoint(sessiond_thread_manage_clients)) { | |
4578 | goto error; | |
4579 | } | |
4580 | ||
e547b070 | 4581 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
4582 | goto error; |
4583 | } | |
8ac94142 | 4584 | |
840cb59c | 4585 | health_code_update(); |
44a5e5eb | 4586 | |
1d4b027a | 4587 | while (1) { |
1d4b027a | 4588 | DBG("Accepting client command ..."); |
273ea72c DG |
4589 | |
4590 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 4591 | restart: |
a78af745 | 4592 | health_poll_entry(); |
5eb91c98 | 4593 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 4594 | health_poll_exit(); |
273ea72c | 4595 | if (ret < 0) { |
88f2b785 MD |
4596 | /* |
4597 | * Restart interrupted system call. | |
4598 | */ | |
4599 | if (errno == EINTR) { | |
4600 | goto restart; | |
4601 | } | |
273ea72c DG |
4602 | goto error; |
4603 | } | |
4604 | ||
0d9c5d77 DG |
4605 | nb_fd = ret; |
4606 | ||
5eb91c98 DG |
4607 | for (i = 0; i < nb_fd; i++) { |
4608 | /* Fetch once the poll data */ | |
4609 | revents = LTTNG_POLL_GETEV(&events, i); | |
4610 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4611 | ||
840cb59c | 4612 | health_code_update(); |
44a5e5eb | 4613 | |
fd20dac9 MD |
4614 | if (!revents) { |
4615 | /* No activity for this FD (poll implementation). */ | |
4616 | continue; | |
4617 | } | |
4618 | ||
5eb91c98 | 4619 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4620 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 4621 | if (ret) { |
139ac872 MD |
4622 | err = 0; |
4623 | goto exit; | |
5eb91c98 DG |
4624 | } |
4625 | ||
4626 | /* Event on the registration socket */ | |
4627 | if (pollfd == client_sock) { | |
03e43155 MD |
4628 | if (revents & LPOLLIN) { |
4629 | continue; | |
4630 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
5eb91c98 DG |
4631 | ERR("Client socket poll error"); |
4632 | goto error; | |
03e43155 MD |
4633 | } else { |
4634 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4635 | goto error; | |
5eb91c98 DG |
4636 | } |
4637 | } | |
4638 | } | |
4639 | ||
4640 | DBG("Wait for client response"); | |
4641 | ||
840cb59c | 4642 | health_code_update(); |
44a5e5eb | 4643 | |
5eb91c98 DG |
4644 | sock = lttcomm_accept_unix_sock(client_sock); |
4645 | if (sock < 0) { | |
273ea72c | 4646 | goto error; |
273ea72c DG |
4647 | } |
4648 | ||
b662582b DG |
4649 | /* |
4650 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4651 | * show must go on. | |
4652 | */ | |
4653 | (void) utils_set_fd_cloexec(sock); | |
4654 | ||
be040666 DG |
4655 | /* Set socket option for credentials retrieval */ |
4656 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
4657 | if (ret < 0) { | |
4658 | goto error; | |
4659 | } | |
4660 | ||
5eb91c98 | 4661 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 4662 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 4663 | if (cmd_ctx == NULL) { |
76d7553f | 4664 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 4665 | goto error; |
5eb91c98 | 4666 | } |
1d4b027a | 4667 | |
5eb91c98 | 4668 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 4669 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 4670 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 4671 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
4672 | goto error; |
4673 | } | |
1d4b027a | 4674 | |
5eb91c98 DG |
4675 | cmd_ctx->llm = NULL; |
4676 | cmd_ctx->session = NULL; | |
1d4b027a | 4677 | |
840cb59c | 4678 | health_code_update(); |
44a5e5eb | 4679 | |
5eb91c98 DG |
4680 | /* |
4681 | * Data is received from the lttng client. The struct | |
4682 | * lttcomm_session_msg (lsm) contains the command and data request of | |
4683 | * the client. | |
4684 | */ | |
4685 | DBG("Receiving data from client ..."); | |
be040666 DG |
4686 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
4687 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
4688 | if (ret <= 0) { |
4689 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
4690 | ret = close(sock); |
4691 | if (ret) { | |
4692 | PERROR("close"); | |
4693 | } | |
4694 | sock = -1; | |
a2c0da86 | 4695 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4696 | continue; |
4697 | } | |
1d4b027a | 4698 | |
840cb59c | 4699 | health_code_update(); |
44a5e5eb | 4700 | |
5eb91c98 DG |
4701 | // TODO: Validate cmd_ctx including sanity check for |
4702 | // security purpose. | |
f7776ea7 | 4703 | |
f6a9efaa | 4704 | rcu_thread_online(); |
5eb91c98 DG |
4705 | /* |
4706 | * This function dispatch the work to the kernel or userspace tracer | |
4707 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
4708 | * informations for the client. The command context struct contains | |
4709 | * everything this function may needs. | |
4710 | */ | |
53a80697 | 4711 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 4712 | rcu_thread_offline(); |
5eb91c98 | 4713 | if (ret < 0) { |
36134aa1 DG |
4714 | ret = close(sock); |
4715 | if (ret) { | |
4716 | PERROR("close"); | |
53a80697 | 4717 | } |
36134aa1 | 4718 | sock = -1; |
bbd973c2 | 4719 | /* |
5eb91c98 | 4720 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 4721 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
4722 | * (ENOMEM). Error detected but still accept |
4723 | * command, unless a socket error has been | |
4724 | * detected. | |
bbd973c2 | 4725 | */ |
bbd973c2 | 4726 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4727 | continue; |
4728 | } | |
d6e4fca4 | 4729 | |
840cb59c | 4730 | health_code_update(); |
44a5e5eb | 4731 | |
a1ac8b97 | 4732 | DBG("Sending response (size: %d, retcode: %s (%d))", |
54d01ffb | 4733 | cmd_ctx->lttng_msg_size, |
a1ac8b97 JG |
4734 | lttng_strerror(-cmd_ctx->llm->ret_code), |
4735 | cmd_ctx->llm->ret_code); | |
54d01ffb | 4736 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
4737 | if (ret < 0) { |
4738 | ERR("Failed to send data back to client"); | |
bbd973c2 | 4739 | } |
1d4b027a | 4740 | |
5eb91c98 | 4741 | /* End of transmission */ |
76d7553f MD |
4742 | ret = close(sock); |
4743 | if (ret) { | |
4744 | PERROR("close"); | |
4745 | } | |
4746 | sock = -1; | |
be040666 DG |
4747 | |
4748 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 4749 | |
840cb59c | 4750 | health_code_update(); |
273ea72c DG |
4751 | } |
4752 | ||
139ac872 | 4753 | exit: |
5eb91c98 | 4754 | error: |
35df2755 CB |
4755 | if (sock >= 0) { |
4756 | ret = close(sock); | |
4757 | if (ret) { | |
4758 | PERROR("close"); | |
4759 | } | |
139ac872 | 4760 | } |
44a5e5eb | 4761 | |
35df2755 CB |
4762 | lttng_poll_clean(&events); |
4763 | clean_command_ctx(&cmd_ctx); | |
4764 | ||
4765 | error_listen: | |
4766 | error_create_poll: | |
273ea72c | 4767 | unlink(client_unix_sock_path); |
76d7553f MD |
4768 | if (client_sock >= 0) { |
4769 | ret = close(client_sock); | |
4770 | if (ret) { | |
4771 | PERROR("close"); | |
4772 | } | |
a4b35e07 | 4773 | } |
35df2755 CB |
4774 | |
4775 | if (err) { | |
840cb59c | 4776 | health_error(); |
35df2755 | 4777 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4778 | } |
273ea72c | 4779 | |
8782cc74 | 4780 | health_unregister(health_sessiond); |
35df2755 CB |
4781 | |
4782 | DBG("Client thread dying"); | |
f6a9efaa DG |
4783 | |
4784 | rcu_unregister_thread(); | |
4a15001e MD |
4785 | |
4786 | /* | |
4787 | * Since we are creating the consumer threads, we own them, so we need | |
4788 | * to join them before our thread exits. | |
4789 | */ | |
4790 | ret = join_consumer_thread(&kconsumer_data); | |
4791 | if (ret) { | |
4792 | errno = ret; | |
4793 | PERROR("join_consumer"); | |
4794 | } | |
4795 | ||
4796 | ret = join_consumer_thread(&ustconsumer32_data); | |
4797 | if (ret) { | |
4798 | errno = ret; | |
4799 | PERROR("join_consumer ust32"); | |
4800 | } | |
4801 | ||
4802 | ret = join_consumer_thread(&ustconsumer64_data); | |
4803 | if (ret) { | |
4804 | errno = ret; | |
4805 | PERROR("join_consumer ust64"); | |
4806 | } | |
1d4b027a DG |
4807 | return NULL; |
4808 | } | |
4809 | ||
c0232ea5 JG |
4810 | static int string_match(const char *str1, const char *str2) |
4811 | { | |
4812 | return (str1 && str2) && !strcmp(str1, str2); | |
4813 | } | |
4814 | ||
fac6795d | 4815 | /* |
26296c48 JG |
4816 | * Take an option from the getopt output and set it in the right variable to be |
4817 | * used later. | |
4818 | * | |
4819 | * Return 0 on success else a negative value. | |
fac6795d | 4820 | */ |
26296c48 | 4821 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4822 | { |
26296c48 | 4823 | int ret = 0; |
fac6795d | 4824 | |
c0232ea5 | 4825 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
4826 | if (!arg || *arg == '\0') { |
4827 | ret = -EINVAL; | |
4828 | goto end; | |
4829 | } | |
e8fa9fb0 MD |
4830 | if (lttng_is_setuid_setgid()) { |
4831 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4832 | "-c, --client-sock"); | |
4833 | } else { | |
4834 | snprintf(client_unix_sock_path, PATH_MAX, "%s", arg); | |
4835 | } | |
c0232ea5 | 4836 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
4837 | if (!arg || *arg == '\0') { |
4838 | ret = -EINVAL; | |
4839 | goto end; | |
4840 | } | |
e8fa9fb0 MD |
4841 | if (lttng_is_setuid_setgid()) { |
4842 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4843 | "-a, --apps-sock"); | |
4844 | } else { | |
4845 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", arg); | |
4846 | } | |
c0232ea5 | 4847 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
26296c48 | 4848 | opt_daemon = 1; |
c0232ea5 | 4849 | } else if (string_match(optname, "background") || opt == 'b') { |
72dd7491 | 4850 | opt_background = 1; |
c0232ea5 | 4851 | } else if (string_match(optname, "group") || opt == 'g') { |
66b2ce8e JG |
4852 | if (!arg || *arg == '\0') { |
4853 | ret = -EINVAL; | |
4854 | goto end; | |
4855 | } | |
e8fa9fb0 MD |
4856 | if (lttng_is_setuid_setgid()) { |
4857 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4858 | "-g, --group"); | |
4859 | } else { | |
4860 | /* | |
4861 | * If the override option is set, the pointer points to a | |
4862 | * *non* const thus freeing it even though the variable type is | |
4863 | * set to const. | |
4864 | */ | |
4865 | if (tracing_group_name_override) { | |
4866 | free((void *) tracing_group_name); | |
4867 | } | |
4868 | tracing_group_name = strdup(arg); | |
4869 | if (!tracing_group_name) { | |
4870 | PERROR("strdup"); | |
4871 | ret = -ENOMEM; | |
4872 | } | |
4873 | tracing_group_name_override = 1; | |
db322c4d | 4874 | } |
c0232ea5 | 4875 | } else if (string_match(optname, "help") || opt == 'h') { |
4fc83d94 | 4876 | ret = utils_show_help(8, "lttng-sessiond", help_msg); |
8190767e | 4877 | if (ret) { |
4fc83d94 | 4878 | ERR("Cannot show --help for `lttng-sessiond`"); |
8190767e PP |
4879 | perror("exec"); |
4880 | } | |
4881 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 4882 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
4883 | fprintf(stdout, "%s\n", VERSION); |
4884 | exit(EXIT_SUCCESS); | |
c0232ea5 | 4885 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
26296c48 | 4886 | opt_sig_parent = 1; |
c0232ea5 | 4887 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
66b2ce8e JG |
4888 | if (!arg || *arg == '\0') { |
4889 | ret = -EINVAL; | |
4890 | goto end; | |
4891 | } | |
e8fa9fb0 MD |
4892 | if (lttng_is_setuid_setgid()) { |
4893 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4894 | "--kconsumerd-err-sock"); | |
4895 | } else { | |
4896 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4897 | } | |
c0232ea5 | 4898 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
4899 | if (!arg || *arg == '\0') { |
4900 | ret = -EINVAL; | |
4901 | goto end; | |
4902 | } | |
e8fa9fb0 MD |
4903 | if (lttng_is_setuid_setgid()) { |
4904 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4905 | "--kconsumerd-cmd-sock"); | |
4906 | } else { | |
4907 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4908 | } | |
c0232ea5 | 4909 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e 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 | "--ustconsumerd64-err-sock"); | |
4917 | } else { | |
4918 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4919 | } | |
c0232ea5 | 4920 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
66b2ce8e JG |
4921 | if (!arg || *arg == '\0') { |
4922 | ret = -EINVAL; | |
4923 | goto end; | |
4924 | } | |
e8fa9fb0 MD |
4925 | if (lttng_is_setuid_setgid()) { |
4926 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4927 | "--ustconsumerd64-cmd-sock"); | |
4928 | } else { | |
4929 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4930 | } | |
c0232ea5 | 4931 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
66b2ce8e JG |
4932 | if (!arg || *arg == '\0') { |
4933 | ret = -EINVAL; | |
4934 | goto end; | |
4935 | } | |
e8fa9fb0 MD |
4936 | if (lttng_is_setuid_setgid()) { |
4937 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4938 | "--ustconsumerd32-err-sock"); | |
4939 | } else { | |
4940 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4941 | } | |
c0232ea5 | 4942 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
66b2ce8e JG |
4943 | if (!arg || *arg == '\0') { |
4944 | ret = -EINVAL; | |
4945 | goto end; | |
4946 | } | |
e8fa9fb0 MD |
4947 | if (lttng_is_setuid_setgid()) { |
4948 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4949 | "--ustconsumerd32-cmd-sock"); | |
4950 | } else { | |
4951 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4952 | } | |
c0232ea5 | 4953 | } else if (string_match(optname, "no-kernel")) { |
26296c48 | 4954 | opt_no_kernel = 1; |
c0232ea5 | 4955 | } else if (string_match(optname, "quiet") || opt == 'q') { |
26296c48 | 4956 | lttng_opt_quiet = 1; |
c0232ea5 | 4957 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
4958 | /* Verbose level can increase using multiple -v */ |
4959 | if (arg) { | |
13755a18 | 4960 | /* Value obtained from config file */ |
26296c48 JG |
4961 | lttng_opt_verbose = config_parse_value(arg); |
4962 | } else { | |
13755a18 JG |
4963 | /* -v used on command line */ |
4964 | lttng_opt_verbose++; | |
26296c48 | 4965 | } |
13755a18 JG |
4966 | /* Clamp value to [0, 3] */ |
4967 | lttng_opt_verbose = lttng_opt_verbose < 0 ? 0 : | |
4968 | (lttng_opt_verbose <= 3 ? lttng_opt_verbose : 3); | |
c0232ea5 | 4969 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 JG |
4970 | if (arg) { |
4971 | opt_verbose_consumer = config_parse_value(arg); | |
4972 | } else { | |
ca939de8 | 4973 | opt_verbose_consumer++; |
26296c48 | 4974 | } |
c0232ea5 | 4975 | } else if (string_match(optname, "consumerd32-path")) { |
66b2ce8e JG |
4976 | if (!arg || *arg == '\0') { |
4977 | ret = -EINVAL; | |
4978 | goto end; | |
4979 | } | |
e8fa9fb0 MD |
4980 | if (lttng_is_setuid_setgid()) { |
4981 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4982 | "--consumerd32-path"); | |
4983 | } else { | |
4984 | if (consumerd32_bin_override) { | |
4985 | free((void *) consumerd32_bin); | |
4986 | } | |
4987 | consumerd32_bin = strdup(arg); | |
4988 | if (!consumerd32_bin) { | |
4989 | PERROR("strdup"); | |
4990 | ret = -ENOMEM; | |
4991 | } | |
4992 | consumerd32_bin_override = 1; | |
db322c4d | 4993 | } |
c0232ea5 | 4994 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
4995 | if (!arg || *arg == '\0') { |
4996 | ret = -EINVAL; | |
4997 | goto end; | |
4998 | } | |
e8fa9fb0 MD |
4999 | if (lttng_is_setuid_setgid()) { |
5000 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5001 | "--consumerd32-libdir"); | |
5002 | } else { | |
5003 | if (consumerd32_libdir_override) { | |
5004 | free((void *) consumerd32_libdir); | |
5005 | } | |
5006 | consumerd32_libdir = strdup(arg); | |
5007 | if (!consumerd32_libdir) { | |
5008 | PERROR("strdup"); | |
5009 | ret = -ENOMEM; | |
5010 | } | |
5011 | consumerd32_libdir_override = 1; | |
db322c4d | 5012 | } |
c0232ea5 | 5013 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
5014 | if (!arg || *arg == '\0') { |
5015 | ret = -EINVAL; | |
5016 | goto end; | |
5017 | } | |
e8fa9fb0 MD |
5018 | if (lttng_is_setuid_setgid()) { |
5019 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5020 | "--consumerd64-path"); | |
5021 | } else { | |
5022 | if (consumerd64_bin_override) { | |
5023 | free((void *) consumerd64_bin); | |
5024 | } | |
5025 | consumerd64_bin = strdup(arg); | |
5026 | if (!consumerd64_bin) { | |
5027 | PERROR("strdup"); | |
5028 | ret = -ENOMEM; | |
5029 | } | |
5030 | consumerd64_bin_override = 1; | |
db322c4d | 5031 | } |
c0232ea5 | 5032 | } else if (string_match(optname, "consumerd64-libdir")) { |
66b2ce8e JG |
5033 | if (!arg || *arg == '\0') { |
5034 | ret = -EINVAL; | |
5035 | goto end; | |
5036 | } | |
e8fa9fb0 MD |
5037 | if (lttng_is_setuid_setgid()) { |
5038 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5039 | "--consumerd64-libdir"); | |
5040 | } else { | |
5041 | if (consumerd64_libdir_override) { | |
5042 | free((void *) consumerd64_libdir); | |
5043 | } | |
5044 | consumerd64_libdir = strdup(arg); | |
5045 | if (!consumerd64_libdir) { | |
5046 | PERROR("strdup"); | |
5047 | ret = -ENOMEM; | |
5048 | } | |
5049 | consumerd64_libdir_override = 1; | |
db322c4d | 5050 | } |
c0232ea5 | 5051 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
66b2ce8e JG |
5052 | if (!arg || *arg == '\0') { |
5053 | ret = -EINVAL; | |
5054 | goto end; | |
5055 | } | |
e8fa9fb0 MD |
5056 | if (lttng_is_setuid_setgid()) { |
5057 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5058 | "-p, --pidfile"); | |
5059 | } else { | |
5060 | free(opt_pidfile); | |
5061 | opt_pidfile = strdup(arg); | |
5062 | if (!opt_pidfile) { | |
5063 | PERROR("strdup"); | |
5064 | ret = -ENOMEM; | |
5065 | } | |
db322c4d | 5066 | } |
c0232ea5 | 5067 | } else if (string_match(optname, "agent-tcp-port")) { |
66b2ce8e JG |
5068 | if (!arg || *arg == '\0') { |
5069 | ret = -EINVAL; | |
5070 | goto end; | |
5071 | } | |
e8fa9fb0 MD |
5072 | if (lttng_is_setuid_setgid()) { |
5073 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5074 | "--agent-tcp-port"); | |
5075 | } else { | |
5076 | unsigned long v; | |
4d076222 | 5077 | |
e8fa9fb0 MD |
5078 | errno = 0; |
5079 | v = strtoul(arg, NULL, 0); | |
5080 | if (errno != 0 || !isdigit(arg[0])) { | |
5081 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
5082 | return -1; | |
5083 | } | |
5084 | if (v == 0 || v >= 65535) { | |
5085 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
5086 | return -1; | |
5087 | } | |
5088 | agent_tcp_port = (uint32_t) v; | |
5089 | DBG3("Agent TCP port set to non default: %u", agent_tcp_port); | |
26296c48 | 5090 | } |
c0232ea5 | 5091 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
5092 | if (!arg || *arg == '\0') { |
5093 | ret = -EINVAL; | |
5094 | goto end; | |
5095 | } | |
e8fa9fb0 MD |
5096 | if (lttng_is_setuid_setgid()) { |
5097 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5098 | "-l, --load"); | |
5099 | } else { | |
5100 | free(opt_load_session_path); | |
5101 | opt_load_session_path = strdup(arg); | |
5102 | if (!opt_load_session_path) { | |
5103 | PERROR("strdup"); | |
5104 | ret = -ENOMEM; | |
5105 | } | |
ef367a93 | 5106 | } |
c0232ea5 | 5107 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
5108 | if (!arg || *arg == '\0') { |
5109 | ret = -EINVAL; | |
5110 | goto end; | |
5111 | } | |
e8fa9fb0 MD |
5112 | if (lttng_is_setuid_setgid()) { |
5113 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5114 | "--kmod-probes"); | |
5115 | } else { | |
5116 | free(kmod_probes_list); | |
5117 | kmod_probes_list = strdup(arg); | |
5118 | if (!kmod_probes_list) { | |
5119 | PERROR("strdup"); | |
5120 | ret = -ENOMEM; | |
5121 | } | |
c9d42407 | 5122 | } |
c0232ea5 | 5123 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
5124 | if (!arg || *arg == '\0') { |
5125 | ret = -EINVAL; | |
5126 | goto end; | |
5127 | } | |
e8fa9fb0 MD |
5128 | if (lttng_is_setuid_setgid()) { |
5129 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5130 | "--extra-kmod-probes"); | |
5131 | } else { | |
5132 | free(kmod_extra_probes_list); | |
5133 | kmod_extra_probes_list = strdup(arg); | |
5134 | if (!kmod_extra_probes_list) { | |
5135 | PERROR("strdup"); | |
5136 | ret = -ENOMEM; | |
5137 | } | |
db322c4d | 5138 | } |
c0232ea5 JG |
5139 | } else if (string_match(optname, "config") || opt == 'f') { |
5140 | /* This is handled in set_options() thus silent skip. */ | |
5141 | goto end; | |
5142 | } else { | |
26296c48 JG |
5143 | /* Unknown option or other error. |
5144 | * Error is printed by getopt, just return */ | |
5145 | ret = -1; | |
5146 | } | |
5147 | ||
f3dd7ce7 | 5148 | end: |
c5d350b2 JG |
5149 | if (ret == -EINVAL) { |
5150 | const char *opt_name = "unknown"; | |
5151 | int i; | |
5152 | ||
5153 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
5154 | i++) { | |
5155 | if (opt == long_options[i].val) { | |
5156 | opt_name = long_options[i].name; | |
5157 | break; | |
5158 | } | |
5159 | } | |
5160 | ||
5161 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
5162 | opt_name); | |
5163 | } | |
f3dd7ce7 | 5164 | |
26296c48 JG |
5165 | return ret; |
5166 | } | |
5167 | ||
5168 | /* | |
5169 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 5170 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
5171 | * return value conventions. |
5172 | */ | |
5173 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
5174 | { | |
5175 | int ret = 0, i; | |
5176 | ||
5177 | if (!entry || !entry->name || !entry->value) { | |
5178 | ret = -EINVAL; | |
5179 | goto end; | |
5180 | } | |
5181 | ||
5182 | /* Check if the option is to be ignored */ | |
5183 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
5184 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
5185 | goto end; | |
5186 | } | |
5187 | } | |
5188 | ||
5189 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
5190 | i++) { | |
5191 | ||
5192 | /* Ignore if not fully matched. */ | |
5193 | if (strcmp(entry->name, long_options[i].name)) { | |
5194 | continue; | |
5195 | } | |
5196 | ||
5197 | /* | |
5198 | * If the option takes no argument on the command line, we have to | |
5199 | * check if the value is "true". We support non-zero numeric values, | |
5200 | * true, on and yes. | |
5201 | */ | |
5202 | if (!long_options[i].has_arg) { | |
5203 | ret = config_parse_value(entry->value); | |
5204 | if (ret <= 0) { | |
5205 | if (ret) { | |
5206 | WARN("Invalid configuration value \"%s\" for option %s", | |
5207 | entry->value, entry->name); | |
5208 | } | |
5209 | /* False, skip boolean config option. */ | |
5210 | goto end; | |
4d076222 | 5211 | } |
26296c48 JG |
5212 | } |
5213 | ||
5214 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
5215 | goto end; | |
5216 | } | |
5217 | ||
5218 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
5219 | ||
5220 | end: | |
5221 | return ret; | |
5222 | } | |
5223 | ||
5224 | /* | |
5225 | * daemon configuration loading and argument parsing | |
5226 | */ | |
5227 | static int set_options(int argc, char **argv) | |
5228 | { | |
5229 | int ret = 0, c = 0, option_index = 0; | |
5230 | int orig_optopt = optopt, orig_optind = optind; | |
5231 | char *optstring; | |
5232 | const char *config_path = NULL; | |
5233 | ||
5234 | optstring = utils_generate_optstring(long_options, | |
5235 | sizeof(long_options) / sizeof(struct option)); | |
5236 | if (!optstring) { | |
5237 | ret = -ENOMEM; | |
5238 | goto end; | |
5239 | } | |
5240 | ||
5241 | /* Check for the --config option */ | |
5242 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
5243 | &option_index)) != -1) { | |
5244 | if (c == '?') { | |
5245 | ret = -EINVAL; | |
5246 | goto end; | |
5247 | } else if (c != 'f') { | |
5248 | /* if not equal to --config option. */ | |
5249 | continue; | |
5250 | } | |
5251 | ||
e8fa9fb0 MD |
5252 | if (lttng_is_setuid_setgid()) { |
5253 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5254 | "-f, --config"); | |
5255 | } else { | |
5256 | config_path = utils_expand_path(optarg); | |
5257 | if (!config_path) { | |
5258 | ERR("Failed to resolve path: %s", optarg); | |
5259 | } | |
26296c48 JG |
5260 | } |
5261 | } | |
5262 | ||
5263 | ret = config_get_section_entries(config_path, config_section_name, | |
5264 | config_entry_handler, NULL); | |
5265 | if (ret) { | |
5266 | if (ret > 0) { | |
5267 | ERR("Invalid configuration option at line %i", ret); | |
5268 | ret = -1; | |
5269 | } | |
5270 | goto end; | |
5271 | } | |
5272 | ||
5273 | /* Reset getopt's global state */ | |
5274 | optopt = orig_optopt; | |
5275 | optind = orig_optind; | |
5276 | while (1) { | |
c0232ea5 JG |
5277 | option_index = -1; |
5278 | /* | |
5279 | * getopt_long() will not set option_index if it encounters a | |
5280 | * short option. | |
5281 | */ | |
5282 | c = getopt_long(argc, argv, optstring, long_options, | |
5283 | &option_index); | |
26296c48 | 5284 | if (c == -1) { |
4d076222 DG |
5285 | break; |
5286 | } | |
26296c48 | 5287 | |
c0232ea5 JG |
5288 | /* |
5289 | * Pass NULL as the long option name if popt left the index | |
5290 | * unset. | |
5291 | */ | |
5292 | ret = set_option(c, optarg, | |
5293 | option_index < 0 ? NULL : | |
5294 | long_options[option_index].name); | |
26296c48 JG |
5295 | if (ret < 0) { |
5296 | break; | |
fac6795d DG |
5297 | } |
5298 | } | |
5299 | ||
26296c48 JG |
5300 | end: |
5301 | free(optstring); | |
5302 | return ret; | |
fac6795d DG |
5303 | } |
5304 | ||
5305 | /* | |
d063d709 | 5306 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
5307 | * apps_sock - The communication socket for all UST apps. |
5308 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 5309 | */ |
cf3af59e | 5310 | static int init_daemon_socket(void) |
fac6795d DG |
5311 | { |
5312 | int ret = 0; | |
5313 | mode_t old_umask; | |
5314 | ||
5315 | old_umask = umask(0); | |
5316 | ||
5317 | /* Create client tool unix socket */ | |
d6f42150 DG |
5318 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
5319 | if (client_sock < 0) { | |
5320 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
5321 | ret = -1; |
5322 | goto end; | |
5323 | } | |
5324 | ||
b662582b DG |
5325 | /* Set the cloexec flag */ |
5326 | ret = utils_set_fd_cloexec(client_sock); | |
5327 | if (ret < 0) { | |
5328 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
5329 | "Continuing but note that the consumer daemon will have a " | |
5330 | "reference to this socket on exec()", client_sock); | |
5331 | } | |
5332 | ||
fac6795d DG |
5333 | /* File permission MUST be 660 */ |
5334 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
5335 | if (ret < 0) { | |
d6f42150 | 5336 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 5337 | PERROR("chmod"); |
fac6795d DG |
5338 | goto end; |
5339 | } | |
5340 | ||
5341 | /* Create the application unix socket */ | |
d6f42150 DG |
5342 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
5343 | if (apps_sock < 0) { | |
5344 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
5345 | ret = -1; |
5346 | goto end; | |
5347 | } | |
5348 | ||
b662582b DG |
5349 | /* Set the cloexec flag */ |
5350 | ret = utils_set_fd_cloexec(apps_sock); | |
5351 | if (ret < 0) { | |
5352 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
5353 | "Continuing but note that the consumer daemon will have a " | |
5354 | "reference to this socket on exec()", apps_sock); | |
5355 | } | |
5356 | ||
d6f42150 | 5357 | /* File permission MUST be 666 */ |
54d01ffb DG |
5358 | ret = chmod(apps_unix_sock_path, |
5359 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 5360 | if (ret < 0) { |
d6f42150 | 5361 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 5362 | PERROR("chmod"); |
fac6795d DG |
5363 | goto end; |
5364 | } | |
5365 | ||
b662582b DG |
5366 | DBG3("Session daemon client socket %d and application socket %d created", |
5367 | client_sock, apps_sock); | |
5368 | ||
fac6795d DG |
5369 | end: |
5370 | umask(old_umask); | |
5371 | return ret; | |
5372 | } | |
5373 | ||
5374 | /* | |
54d01ffb DG |
5375 | * Check if the global socket is available, and if a daemon is answering at the |
5376 | * other side. If yes, error is returned. | |
fac6795d | 5377 | */ |
cf3af59e | 5378 | static int check_existing_daemon(void) |
fac6795d | 5379 | { |
7d8234d9 | 5380 | /* Is there anybody out there ? */ |
099e26bd | 5381 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 5382 | return -EEXIST; |
099e26bd | 5383 | } |
b09c7c76 DG |
5384 | |
5385 | return 0; | |
fac6795d DG |
5386 | } |
5387 | ||
fac6795d | 5388 | /* |
d063d709 | 5389 | * Set the tracing group gid onto the client socket. |
5e16da05 | 5390 | * |
d063d709 | 5391 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 5392 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 5393 | */ |
be040666 | 5394 | static int set_permissions(char *rundir) |
fac6795d DG |
5395 | { |
5396 | int ret; | |
996b65c8 | 5397 | gid_t gid; |
fac6795d | 5398 | |
6c71277b | 5399 | gid = utils_get_group_id(tracing_group_name); |
fac6795d | 5400 | |
d6f42150 | 5401 | /* Set lttng run dir */ |
be040666 | 5402 | ret = chown(rundir, 0, gid); |
d6f42150 | 5403 | if (ret < 0) { |
be040666 | 5404 | ERR("Unable to set group on %s", rundir); |
76d7553f | 5405 | PERROR("chown"); |
d6f42150 DG |
5406 | } |
5407 | ||
6c71277b MD |
5408 | /* |
5409 | * Ensure all applications and tracing group can search the run | |
5410 | * dir. Allow everyone to read the directory, since it does not | |
5411 | * buy us anything to hide its content. | |
5412 | */ | |
5413 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
5414 | if (ret < 0) { |
5415 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 5416 | PERROR("chmod"); |
d1613cf5 JN |
5417 | } |
5418 | ||
d6f42150 | 5419 | /* lttng client socket path */ |
996b65c8 | 5420 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 5421 | if (ret < 0) { |
d6f42150 | 5422 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 5423 | PERROR("chown"); |
d6f42150 DG |
5424 | } |
5425 | ||
3bd1e081 | 5426 | /* kconsumer error socket path */ |
6c71277b | 5427 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 5428 | if (ret < 0) { |
3bd1e081 | 5429 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 5430 | PERROR("chown"); |
3bd1e081 MD |
5431 | } |
5432 | ||
7753dea8 | 5433 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 5434 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
5435 | if (ret < 0) { |
5436 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 5437 | PERROR("chown"); |
7753dea8 MD |
5438 | } |
5439 | ||
5440 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 5441 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 5442 | if (ret < 0) { |
7753dea8 | 5443 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 5444 | PERROR("chown"); |
fac6795d DG |
5445 | } |
5446 | ||
d6f42150 | 5447 | DBG("All permissions are set"); |
e07ae692 | 5448 | |
fac6795d DG |
5449 | return ret; |
5450 | } | |
5451 | ||
d6f42150 | 5452 | /* |
d063d709 | 5453 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 5454 | */ |
67e40797 | 5455 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
5456 | { |
5457 | int ret; | |
5458 | ||
67e40797 DG |
5459 | DBG3("Creating LTTng run directory: %s", rundir); |
5460 | ||
d1613cf5 | 5461 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 5462 | if (ret < 0) { |
b1f11e69 | 5463 | if (errno != EEXIST) { |
67e40797 | 5464 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
5465 | goto error; |
5466 | } else { | |
5467 | ret = 0; | |
5468 | } | |
d6f42150 DG |
5469 | } |
5470 | ||
5471 | error: | |
5472 | return ret; | |
5473 | } | |
5474 | ||
5475 | /* | |
d063d709 DG |
5476 | * Setup sockets and directory needed by the kconsumerd communication with the |
5477 | * session daemon. | |
d6f42150 | 5478 | */ |
67e40797 DG |
5479 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
5480 | const char *rundir) | |
d6f42150 DG |
5481 | { |
5482 | int ret; | |
67e40797 | 5483 | char path[PATH_MAX]; |
d6f42150 | 5484 | |
6c71277b | 5485 | switch (consumer_data->type) { |
7753dea8 | 5486 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 5487 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
5488 | break; |
5489 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 5490 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
5491 | break; |
5492 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 5493 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
5494 | break; |
5495 | default: | |
5496 | ERR("Consumer type unknown"); | |
5497 | ret = -EINVAL; | |
5498 | goto error; | |
d6f42150 DG |
5499 | } |
5500 | ||
67e40797 DG |
5501 | DBG2("Creating consumer directory: %s", path); |
5502 | ||
6c71277b | 5503 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
e7e1ef17 JR |
5504 | if (ret < 0 && errno != EEXIST) { |
5505 | PERROR("mkdir"); | |
5506 | ERR("Failed to create %s", path); | |
5507 | goto error; | |
d6f42150 | 5508 | } |
6c71277b MD |
5509 | if (is_root) { |
5510 | ret = chown(path, 0, utils_get_group_id(tracing_group_name)); | |
5511 | if (ret < 0) { | |
5512 | ERR("Unable to set group on %s", path); | |
5513 | PERROR("chown"); | |
5514 | goto error; | |
5515 | } | |
5516 | } | |
d6f42150 DG |
5517 | |
5518 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
5519 | consumer_data->err_sock = |
5520 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
5521 | if (consumer_data->err_sock < 0) { | |
5522 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
5523 | ret = -1; |
5524 | goto error; | |
5525 | } | |
5526 | ||
a24f05ab MD |
5527 | /* |
5528 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
5529 | * show must go on. | |
5530 | */ | |
5531 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
5532 | if (ret < 0) { | |
5533 | PERROR("utils_set_fd_cloexec"); | |
5534 | /* continue anyway */ | |
5535 | } | |
5536 | ||
d6f42150 | 5537 | /* File permission MUST be 660 */ |
3bd1e081 | 5538 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 5539 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 5540 | if (ret < 0) { |
3bd1e081 | 5541 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 5542 | PERROR("chmod"); |
d6f42150 DG |
5543 | goto error; |
5544 | } | |
5545 | ||
5546 | error: | |
5547 | return ret; | |
5548 | } | |
5549 | ||
fac6795d | 5550 | /* |
d063d709 | 5551 | * Signal handler for the daemon |
cf3af59e | 5552 | * |
54d01ffb DG |
5553 | * Simply stop all worker threads, leaving main() return gracefully after |
5554 | * joining all threads and calling cleanup(). | |
fac6795d DG |
5555 | */ |
5556 | static void sighandler(int sig) | |
5557 | { | |
5558 | switch (sig) { | |
cf3af59e | 5559 | case SIGINT: |
af87c45a | 5560 | DBG("SIGINT caught"); |
cf3af59e MD |
5561 | stop_threads(); |
5562 | break; | |
5563 | case SIGTERM: | |
af87c45a | 5564 | DBG("SIGTERM caught"); |
cf3af59e MD |
5565 | stop_threads(); |
5566 | break; | |
0bb7724a DG |
5567 | case SIGUSR1: |
5568 | CMM_STORE_SHARED(recv_child_signal, 1); | |
5569 | break; | |
cf3af59e MD |
5570 | default: |
5571 | break; | |
fac6795d | 5572 | } |
fac6795d DG |
5573 | } |
5574 | ||
5575 | /* | |
d063d709 | 5576 | * Setup signal handler for : |
1d4b027a | 5577 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 5578 | */ |
1d4b027a | 5579 | static int set_signal_handler(void) |
fac6795d | 5580 | { |
1d4b027a DG |
5581 | int ret = 0; |
5582 | struct sigaction sa; | |
5583 | sigset_t sigset; | |
fac6795d | 5584 | |
1d4b027a | 5585 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 5586 | PERROR("sigemptyset"); |
1d4b027a DG |
5587 | return ret; |
5588 | } | |
d6f42150 | 5589 | |
1d4b027a DG |
5590 | sa.sa_mask = sigset; |
5591 | sa.sa_flags = 0; | |
0072e5e2 MD |
5592 | |
5593 | sa.sa_handler = sighandler; | |
1d4b027a | 5594 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 5595 | PERROR("sigaction"); |
1d4b027a | 5596 | return ret; |
d6f42150 DG |
5597 | } |
5598 | ||
1d4b027a | 5599 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 5600 | PERROR("sigaction"); |
1d4b027a | 5601 | return ret; |
d6f42150 | 5602 | } |
aaf26714 | 5603 | |
0072e5e2 | 5604 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 5605 | PERROR("sigaction"); |
1d4b027a | 5606 | return ret; |
8c0faa1d DG |
5607 | } |
5608 | ||
0072e5e2 MD |
5609 | sa.sa_handler = SIG_IGN; |
5610 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
5611 | PERROR("sigaction"); |
5612 | return ret; | |
5613 | } | |
5614 | ||
5615 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
5616 | |
5617 | return ret; | |
fac6795d DG |
5618 | } |
5619 | ||
f3ed775e | 5620 | /* |
d063d709 | 5621 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 5622 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e DG |
5623 | */ |
5624 | static void set_ulimit(void) | |
5625 | { | |
5626 | int ret; | |
5627 | struct rlimit lim; | |
5628 | ||
514bb9f0 | 5629 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
5630 | lim.rlim_cur = 65535; |
5631 | lim.rlim_max = 65535; | |
5632 | ||
5633 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
5634 | if (ret < 0) { | |
76d7553f | 5635 | PERROR("failed to set open files limit"); |
f3ed775e DG |
5636 | } |
5637 | } | |
5638 | ||
35f90c40 DG |
5639 | /* |
5640 | * Write pidfile using the rundir and opt_pidfile. | |
5641 | */ | |
4a15001e | 5642 | static int write_pidfile(void) |
35f90c40 DG |
5643 | { |
5644 | int ret; | |
5645 | char pidfile_path[PATH_MAX]; | |
5646 | ||
5647 | assert(rundir); | |
5648 | ||
5649 | if (opt_pidfile) { | |
b8d76705 MD |
5650 | if (lttng_strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path))) { |
5651 | ret = -1; | |
5652 | goto error; | |
5653 | } | |
35f90c40 DG |
5654 | } else { |
5655 | /* Build pidfile path from rundir and opt_pidfile. */ | |
5656 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
5657 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
5658 | if (ret < 0) { | |
5659 | PERROR("snprintf pidfile path"); | |
5660 | goto error; | |
5661 | } | |
5662 | } | |
5663 | ||
5664 | /* | |
4a15001e | 5665 | * Create pid file in rundir. |
35f90c40 | 5666 | */ |
4a15001e | 5667 | ret = utils_create_pid_file(getpid(), pidfile_path); |
35f90c40 | 5668 | error: |
4a15001e | 5669 | return ret; |
35f90c40 DG |
5670 | } |
5671 | ||
c9cb3e7d JG |
5672 | /* |
5673 | * Create lockfile using the rundir and return its fd. | |
5674 | */ | |
5675 | static int create_lockfile(void) | |
5676 | { | |
5677 | int ret; | |
5678 | char lockfile_path[PATH_MAX]; | |
5679 | ||
5680 | ret = generate_lock_file_path(lockfile_path, sizeof(lockfile_path)); | |
5681 | if (ret < 0) { | |
5682 | goto error; | |
5683 | } | |
5684 | ||
5685 | ret = utils_create_lock_file(lockfile_path); | |
5686 | error: | |
5687 | return ret; | |
5688 | } | |
5689 | ||
cd9290dd | 5690 | /* |
022d91ba | 5691 | * Write agent TCP port using the rundir. |
cd9290dd | 5692 | */ |
4a15001e | 5693 | static int write_agent_port(void) |
cd9290dd DG |
5694 | { |
5695 | int ret; | |
5696 | char path[PATH_MAX]; | |
5697 | ||
5698 | assert(rundir); | |
5699 | ||
5700 | ret = snprintf(path, sizeof(path), "%s/" | |
022d91ba | 5701 | DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE, rundir); |
cd9290dd | 5702 | if (ret < 0) { |
022d91ba | 5703 | PERROR("snprintf agent port path"); |
cd9290dd DG |
5704 | goto error; |
5705 | } | |
5706 | ||
5707 | /* | |
4a15001e | 5708 | * Create TCP agent port file in rundir. |
cd9290dd | 5709 | */ |
4a15001e | 5710 | ret = utils_create_pid_file(agent_tcp_port, path); |
cd9290dd DG |
5711 | |
5712 | error: | |
4a15001e | 5713 | return ret; |
ef367a93 JG |
5714 | } |
5715 | ||
fac6795d DG |
5716 | /* |
5717 | * main | |
5718 | */ | |
5719 | int main(int argc, char **argv) | |
5720 | { | |
4a15001e | 5721 | int ret = 0, retval = 0; |
fac6795d | 5722 | void *status; |
ae9e45b3 | 5723 | const char *home_path, *env_app_timeout; |
b3530820 JG |
5724 | struct lttng_pipe *ust32_channel_monitor_pipe = NULL, |
5725 | *ust64_channel_monitor_pipe = NULL, | |
5726 | *kernel_channel_monitor_pipe = NULL; | |
6be1a386 | 5727 | bool notification_thread_running = false; |
55c2a7f9 | 5728 | bool timer_thread_running = false; |
6e0be6cc JD |
5729 | struct lttng_pipe *ust32_channel_rotate_pipe = NULL, |
5730 | *ust64_channel_rotate_pipe = NULL, | |
5731 | *kernel_channel_rotate_pipe = NULL; | |
fac6795d | 5732 | |
335a95b7 MD |
5733 | init_kernel_workarounds(); |
5734 | ||
f6a9efaa DG |
5735 | rcu_register_thread(); |
5736 | ||
4a15001e MD |
5737 | if (set_signal_handler()) { |
5738 | retval = -1; | |
5739 | goto exit_set_signal_handler; | |
0bb7724a DG |
5740 | } |
5741 | ||
7753dea8 | 5742 | setup_consumerd_path(); |
fb09408a | 5743 | |
12744796 DG |
5744 | page_size = sysconf(_SC_PAGESIZE); |
5745 | if (page_size < 0) { | |
5746 | PERROR("sysconf _SC_PAGESIZE"); | |
5747 | page_size = LONG_MAX; | |
5748 | WARN("Fallback page size to %ld", page_size); | |
5749 | } | |
5750 | ||
4a15001e MD |
5751 | /* |
5752 | * Parse arguments and load the daemon configuration file. | |
5753 | * | |
5754 | * We have an exit_options exit path to free memory reserved by | |
5755 | * set_options. This is needed because the rest of sessiond_cleanup() | |
5756 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
5757 | * depends on set_options. | |
5758 | */ | |
fac6795d | 5759 | progname = argv[0]; |
4a15001e MD |
5760 | if (set_options(argc, argv)) { |
5761 | retval = -1; | |
5762 | goto exit_options; | |
fac6795d DG |
5763 | } |
5764 | ||
5765 | /* Daemonize */ | |
72dd7491 | 5766 | if (opt_daemon || opt_background) { |
ceed52b5 MD |
5767 | int i; |
5768 | ||
72dd7491 MD |
5769 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
5770 | !opt_background); | |
53094c05 | 5771 | if (ret < 0) { |
4a15001e MD |
5772 | retval = -1; |
5773 | goto exit_options; | |
53094c05 | 5774 | } |
0bb7724a | 5775 | |
ceed52b5 | 5776 | /* |
0bb7724a | 5777 | * We are in the child. Make sure all other file descriptors are |
4a15001e MD |
5778 | * closed, in case we are called with more opened file |
5779 | * descriptors than the standard ones. | |
ceed52b5 MD |
5780 | */ |
5781 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
5782 | (void) close(i); | |
5783 | } | |
5784 | } | |
5785 | ||
7567352f MD |
5786 | if (run_as_create_worker(argv[0]) < 0) { |
5787 | goto exit_create_run_as_worker_cleanup; | |
5788 | } | |
5789 | ||
4a15001e MD |
5790 | /* |
5791 | * Starting from here, we can create threads. This needs to be after | |
5792 | * lttng_daemonize due to RCU. | |
5793 | */ | |
5794 | ||
5795 | /* | |
5796 | * Initialize the health check subsystem. This call should set the | |
5797 | * appropriate time values. | |
5798 | */ | |
5799 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
5800 | if (!health_sessiond) { | |
5801 | PERROR("health_app_create error"); | |
5802 | retval = -1; | |
5803 | goto exit_health_sessiond_cleanup; | |
5804 | } | |
5805 | ||
4a15001e | 5806 | /* Create thread to clean up RCU hash tables */ |
5e97de00 | 5807 | if (init_ht_cleanup_thread(&ht_cleanup_thread)) { |
4a15001e MD |
5808 | retval = -1; |
5809 | goto exit_ht_cleanup; | |
5810 | } | |
5811 | ||
ceed52b5 | 5812 | /* Create thread quit pipe */ |
4a15001e MD |
5813 | if (init_thread_quit_pipe()) { |
5814 | retval = -1; | |
5815 | goto exit_init_data; | |
fac6795d DG |
5816 | } |
5817 | ||
5818 | /* Check if daemon is UID = 0 */ | |
5819 | is_root = !getuid(); | |
5820 | ||
fac6795d | 5821 | if (is_root) { |
990570ed | 5822 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
4ea184d1 | 5823 | if (!rundir) { |
4a15001e MD |
5824 | retval = -1; |
5825 | goto exit_init_data; | |
4ea184d1 | 5826 | } |
67e40797 DG |
5827 | |
5828 | /* Create global run dir with root access */ | |
4a15001e MD |
5829 | if (create_lttng_rundir(rundir)) { |
5830 | retval = -1; | |
5831 | goto exit_init_data; | |
d6f42150 DG |
5832 | } |
5833 | ||
fac6795d | 5834 | if (strlen(apps_unix_sock_path) == 0) { |
4a15001e | 5835 | ret = snprintf(apps_unix_sock_path, PATH_MAX, |
d6f42150 | 5836 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); |
4a15001e MD |
5837 | if (ret < 0) { |
5838 | retval = -1; | |
5839 | goto exit_init_data; | |
5840 | } | |
fac6795d DG |
5841 | } |
5842 | ||
5843 | if (strlen(client_unix_sock_path) == 0) { | |
4a15001e | 5844 | ret = snprintf(client_unix_sock_path, PATH_MAX, |
d6f42150 | 5845 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); |
4a15001e MD |
5846 | if (ret < 0) { |
5847 | retval = -1; | |
5848 | goto exit_init_data; | |
5849 | } | |
d6f42150 | 5850 | } |
0fdd1e2c DG |
5851 | |
5852 | /* Set global SHM for ust */ | |
5853 | if (strlen(wait_shm_path) == 0) { | |
4a15001e | 5854 | ret = snprintf(wait_shm_path, PATH_MAX, |
0fdd1e2c | 5855 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); |
4a15001e MD |
5856 | if (ret < 0) { |
5857 | retval = -1; | |
5858 | goto exit_init_data; | |
5859 | } | |
0fdd1e2c | 5860 | } |
67e40797 | 5861 | |
44a5e5eb | 5862 | if (strlen(health_unix_sock_path) == 0) { |
4a15001e MD |
5863 | ret = snprintf(health_unix_sock_path, |
5864 | sizeof(health_unix_sock_path), | |
44a5e5eb | 5865 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); |
4a15001e MD |
5866 | if (ret < 0) { |
5867 | retval = -1; | |
5868 | goto exit_init_data; | |
5869 | } | |
44a5e5eb DG |
5870 | } |
5871 | ||
67e40797 | 5872 | /* Setup kernel consumerd path */ |
4a15001e | 5873 | ret = snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5874 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5875 | if (ret < 0) { |
5876 | retval = -1; | |
5877 | goto exit_init_data; | |
5878 | } | |
5879 | ret = snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5880 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5881 | if (ret < 0) { |
5882 | retval = -1; | |
5883 | goto exit_init_data; | |
5884 | } | |
67e40797 DG |
5885 | |
5886 | DBG2("Kernel consumer err path: %s", | |
5887 | kconsumer_data.err_unix_sock_path); | |
5888 | DBG2("Kernel consumer cmd path: %s", | |
5889 | kconsumer_data.cmd_unix_sock_path); | |
b3530820 JG |
5890 | kernel_channel_monitor_pipe = lttng_pipe_open(0); |
5891 | if (!kernel_channel_monitor_pipe) { | |
5892 | ERR("Failed to create kernel consumer channel monitor pipe"); | |
5893 | retval = -1; | |
5894 | goto exit_init_data; | |
5895 | } | |
5896 | kconsumer_data.channel_monitor_pipe = | |
5897 | lttng_pipe_release_writefd( | |
5898 | kernel_channel_monitor_pipe); | |
5899 | if (kconsumer_data.channel_monitor_pipe < 0) { | |
5900 | retval = -1; | |
5901 | goto exit_init_data; | |
5902 | } | |
6e0be6cc JD |
5903 | kernel_channel_rotate_pipe = lttng_pipe_open(0); |
5904 | if (!kernel_channel_rotate_pipe) { | |
5905 | ERR("Failed to create kernel consumer channel rotate pipe"); | |
5906 | retval = -1; | |
5907 | goto exit_init_data; | |
5908 | } | |
5909 | kconsumer_data.channel_rotate_pipe = | |
5910 | lttng_pipe_release_writefd( | |
5911 | kernel_channel_rotate_pipe); | |
5912 | if (kconsumer_data.channel_rotate_pipe < 0) { | |
5913 | retval = -1; | |
5914 | goto exit_init_data; | |
5915 | } | |
fac6795d | 5916 | } else { |
feb0f3e5 | 5917 | home_path = utils_get_home_dir(); |
b082db07 | 5918 | if (home_path == NULL) { |
273ea72c DG |
5919 | /* TODO: Add --socket PATH option */ |
5920 | ERR("Can't get HOME directory for sockets creation."); | |
4a15001e MD |
5921 | retval = -1; |
5922 | goto exit_init_data; | |
b082db07 DG |
5923 | } |
5924 | ||
67e40797 DG |
5925 | /* |
5926 | * Create rundir from home path. This will create something like | |
5927 | * $HOME/.lttng | |
5928 | */ | |
990570ed | 5929 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 | 5930 | if (ret < 0) { |
4a15001e MD |
5931 | retval = -1; |
5932 | goto exit_init_data; | |
67e40797 DG |
5933 | } |
5934 | ||
4a15001e MD |
5935 | if (create_lttng_rundir(rundir)) { |
5936 | retval = -1; | |
5937 | goto exit_init_data; | |
67e40797 DG |
5938 | } |
5939 | ||
fac6795d | 5940 | if (strlen(apps_unix_sock_path) == 0) { |
4a15001e MD |
5941 | ret = snprintf(apps_unix_sock_path, PATH_MAX, |
5942 | DEFAULT_HOME_APPS_UNIX_SOCK, | |
5943 | home_path); | |
5944 | if (ret < 0) { | |
5945 | retval = -1; | |
5946 | goto exit_init_data; | |
5947 | } | |
fac6795d DG |
5948 | } |
5949 | ||
5950 | /* Set the cli tool unix socket path */ | |
5951 | if (strlen(client_unix_sock_path) == 0) { | |
4a15001e MD |
5952 | ret = snprintf(client_unix_sock_path, PATH_MAX, |
5953 | DEFAULT_HOME_CLIENT_UNIX_SOCK, | |
5954 | home_path); | |
5955 | if (ret < 0) { | |
5956 | retval = -1; | |
5957 | goto exit_init_data; | |
5958 | } | |
fac6795d | 5959 | } |
0fdd1e2c DG |
5960 | |
5961 | /* Set global SHM for ust */ | |
5962 | if (strlen(wait_shm_path) == 0) { | |
4a15001e MD |
5963 | ret = snprintf(wait_shm_path, PATH_MAX, |
5964 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, | |
5965 | getuid()); | |
5966 | if (ret < 0) { | |
5967 | retval = -1; | |
5968 | goto exit_init_data; | |
5969 | } | |
0fdd1e2c | 5970 | } |
44a5e5eb DG |
5971 | |
5972 | /* Set health check Unix path */ | |
5973 | if (strlen(health_unix_sock_path) == 0) { | |
4a15001e MD |
5974 | ret = snprintf(health_unix_sock_path, |
5975 | sizeof(health_unix_sock_path), | |
5976 | DEFAULT_HOME_HEALTH_UNIX_SOCK, | |
5977 | home_path); | |
5978 | if (ret < 0) { | |
5979 | retval = -1; | |
5980 | goto exit_init_data; | |
5981 | } | |
44a5e5eb | 5982 | } |
fac6795d DG |
5983 | } |
5984 | ||
c9cb3e7d JG |
5985 | lockfile_fd = create_lockfile(); |
5986 | if (lockfile_fd < 0) { | |
4a15001e MD |
5987 | retval = -1; |
5988 | goto exit_init_data; | |
c9cb3e7d JG |
5989 | } |
5990 | ||
5c827ce0 DG |
5991 | /* Set consumer initial state */ |
5992 | kernel_consumerd_state = CONSUMER_STOPPED; | |
5993 | ust_consumerd_state = CONSUMER_STOPPED; | |
5994 | ||
847177cd DG |
5995 | DBG("Client socket path %s", client_unix_sock_path); |
5996 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 5997 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
5998 | DBG("LTTng run directory path: %s", rundir); |
5999 | ||
6000 | /* 32 bits consumerd path setup */ | |
4a15001e | 6001 | ret = snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 6002 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
4a15001e MD |
6003 | if (ret < 0) { |
6004 | PERROR("snprintf 32-bit consumer error socket path"); | |
6005 | retval = -1; | |
6006 | goto exit_init_data; | |
6007 | } | |
6008 | ret = snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 6009 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
4a15001e MD |
6010 | if (ret < 0) { |
6011 | PERROR("snprintf 32-bit consumer command socket path"); | |
6012 | retval = -1; | |
6013 | goto exit_init_data; | |
6014 | } | |
67e40797 DG |
6015 | |
6016 | DBG2("UST consumer 32 bits err path: %s", | |
6017 | ustconsumer32_data.err_unix_sock_path); | |
6018 | DBG2("UST consumer 32 bits cmd path: %s", | |
6019 | ustconsumer32_data.cmd_unix_sock_path); | |
b3530820 JG |
6020 | ust32_channel_monitor_pipe = lttng_pipe_open(0); |
6021 | if (!ust32_channel_monitor_pipe) { | |
6022 | ERR("Failed to create 32-bit user space consumer channel monitor pipe"); | |
6023 | retval = -1; | |
6024 | goto exit_init_data; | |
6025 | } | |
6026 | ustconsumer32_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
6027 | ust32_channel_monitor_pipe); | |
6028 | if (ustconsumer32_data.channel_monitor_pipe < 0) { | |
6029 | retval = -1; | |
6030 | goto exit_init_data; | |
6031 | } | |
6e0be6cc JD |
6032 | ust32_channel_rotate_pipe = lttng_pipe_open(0); |
6033 | if (!ust32_channel_rotate_pipe) { | |
6034 | ERR("Failed to create 32-bit user space consumer channel rotate pipe"); | |
6035 | retval = -1; | |
6036 | goto exit_init_data; | |
6037 | } | |
6038 | ustconsumer32_data.channel_rotate_pipe = lttng_pipe_release_writefd( | |
6039 | ust32_channel_rotate_pipe); | |
6040 | if (ustconsumer32_data.channel_rotate_pipe < 0) { | |
6041 | retval = -1; | |
6042 | goto exit_init_data; | |
6043 | } | |
67e40797 | 6044 | |
55c2a7f9 JD |
6045 | /* |
6046 | * Create the rotate_timer_pipe as non blocking because we have to | |
6047 | * write in it from the sighandler. | |
6048 | */ | |
6049 | ret = utils_create_pipe_cloexec_nonblock(rotate_timer_pipe); | |
6050 | if (ret < 0) { | |
6051 | ERR("Failed to create rotate pending pipe"); | |
6052 | retval = -1; | |
6053 | goto exit_init_data; | |
6054 | } | |
6055 | ||
67e40797 | 6056 | /* 64 bits consumerd path setup */ |
4a15001e | 6057 | ret = snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 6058 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
4a15001e MD |
6059 | if (ret < 0) { |
6060 | PERROR("snprintf 64-bit consumer error socket path"); | |
6061 | retval = -1; | |
6062 | goto exit_init_data; | |
6063 | } | |
6064 | ret = snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 6065 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
4a15001e MD |
6066 | if (ret < 0) { |
6067 | PERROR("snprintf 64-bit consumer command socket path"); | |
6068 | retval = -1; | |
6069 | goto exit_init_data; | |
6070 | } | |
67e40797 DG |
6071 | |
6072 | DBG2("UST consumer 64 bits err path: %s", | |
6073 | ustconsumer64_data.err_unix_sock_path); | |
6074 | DBG2("UST consumer 64 bits cmd path: %s", | |
6075 | ustconsumer64_data.cmd_unix_sock_path); | |
b3530820 JG |
6076 | ust64_channel_monitor_pipe = lttng_pipe_open(0); |
6077 | if (!ust64_channel_monitor_pipe) { | |
6078 | ERR("Failed to create 64-bit user space consumer channel monitor pipe"); | |
6079 | retval = -1; | |
6080 | goto exit_init_data; | |
6081 | } | |
6082 | ustconsumer64_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
6083 | ust64_channel_monitor_pipe); | |
6084 | if (ustconsumer64_data.channel_monitor_pipe < 0) { | |
6085 | retval = -1; | |
6086 | goto exit_init_data; | |
6087 | } | |
6e0be6cc JD |
6088 | ust64_channel_rotate_pipe = lttng_pipe_open(0); |
6089 | if (!ust64_channel_rotate_pipe) { | |
6090 | ERR("Failed to create 64-bit user space consumer channel rotate pipe"); | |
6091 | retval = -1; | |
6092 | goto exit_init_data; | |
6093 | } | |
6094 | ustconsumer64_data.channel_rotate_pipe = lttng_pipe_release_writefd( | |
6095 | ust64_channel_rotate_pipe); | |
6096 | if (ustconsumer64_data.channel_rotate_pipe < 0) { | |
6097 | retval = -1; | |
6098 | goto exit_init_data; | |
6099 | } | |
847177cd | 6100 | |
273ea72c | 6101 | /* |
7d8234d9 | 6102 | * See if daemon already exist. |
fac6795d | 6103 | */ |
4a15001e | 6104 | if (check_existing_daemon()) { |
75462a81 | 6105 | ERR("Already running daemon.\n"); |
273ea72c | 6106 | /* |
cf3af59e MD |
6107 | * We do not goto exit because we must not cleanup() |
6108 | * because a daemon is already running. | |
ab118b20 | 6109 | */ |
4a15001e MD |
6110 | retval = -1; |
6111 | goto exit_init_data; | |
a88df331 DG |
6112 | } |
6113 | ||
1427f9b2 DG |
6114 | /* |
6115 | * Init UST app hash table. Alloc hash table before this point since | |
6116 | * cleanup() can get called after that point. | |
6117 | */ | |
4a15001e | 6118 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 6119 | ERR("Failed to allocate UST app hash table"); |
4a15001e MD |
6120 | retval = -1; |
6121 | goto exit_init_data; | |
6122 | } | |
1427f9b2 | 6123 | |
6a4e4039 JG |
6124 | /* |
6125 | * Initialize agent app hash table. We allocate the hash table here | |
6126 | * since cleanup() can get called after this point. | |
6127 | */ | |
6128 | if (agent_app_ht_alloc()) { | |
6129 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e MD |
6130 | retval = -1; |
6131 | goto exit_init_data; | |
f20baf8e DG |
6132 | } |
6133 | ||
a88df331 DG |
6134 | /* |
6135 | * These actions must be executed as root. We do that *after* setting up | |
6136 | * the sockets path because we MUST make the check for another daemon using | |
6137 | * those paths *before* trying to set the kernel consumer sockets and init | |
6138 | * kernel tracer. | |
6139 | */ | |
6140 | if (is_root) { | |
4a15001e MD |
6141 | if (set_consumer_sockets(&kconsumer_data, rundir)) { |
6142 | retval = -1; | |
6143 | goto exit_init_data; | |
7753dea8 MD |
6144 | } |
6145 | ||
a88df331 | 6146 | /* Setup kernel tracer */ |
4fba7219 DG |
6147 | if (!opt_no_kernel) { |
6148 | init_kernel_tracer(); | |
89588270 DG |
6149 | if (kernel_tracer_fd >= 0) { |
6150 | ret = syscall_init_table(); | |
6151 | if (ret < 0) { | |
4a15001e MD |
6152 | ERR("Unable to populate syscall table. " |
6153 | "Syscall tracing won't work " | |
6154 | "for this session daemon."); | |
89588270 | 6155 | } |
834978fd | 6156 | } |
4fba7219 | 6157 | } |
a88df331 DG |
6158 | |
6159 | /* Set ulimit for open files */ | |
6160 | set_ulimit(); | |
fac6795d | 6161 | } |
4063050c MD |
6162 | /* init lttng_fd tracking must be done after set_ulimit. */ |
6163 | lttng_fd_init(); | |
fac6795d | 6164 | |
4a15001e MD |
6165 | if (set_consumer_sockets(&ustconsumer64_data, rundir)) { |
6166 | retval = -1; | |
6167 | goto exit_init_data; | |
67e40797 DG |
6168 | } |
6169 | ||
4a15001e MD |
6170 | if (set_consumer_sockets(&ustconsumer32_data, rundir)) { |
6171 | retval = -1; | |
6172 | goto exit_init_data; | |
67e40797 DG |
6173 | } |
6174 | ||
d6f42150 | 6175 | /* Setup the needed unix socket */ |
4a15001e MD |
6176 | if (init_daemon_socket()) { |
6177 | retval = -1; | |
6178 | goto exit_init_data; | |
fac6795d DG |
6179 | } |
6180 | ||
6181 | /* Set credentials to socket */ | |
4a15001e MD |
6182 | if (is_root && set_permissions(rundir)) { |
6183 | retval = -1; | |
6184 | goto exit_init_data; | |
fac6795d DG |
6185 | } |
6186 | ||
5b8719f5 DG |
6187 | /* Get parent pid if -S, --sig-parent is specified. */ |
6188 | if (opt_sig_parent) { | |
6189 | ppid = getppid(); | |
6190 | } | |
6191 | ||
7a485870 | 6192 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 | 6193 | if (is_root && !opt_no_kernel) { |
4a15001e MD |
6194 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
6195 | retval = -1; | |
6196 | goto exit_init_data; | |
6620da75 | 6197 | } |
7a485870 DG |
6198 | } |
6199 | ||
099e26bd | 6200 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
6201 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
6202 | retval = -1; | |
6203 | goto exit_init_data; | |
099e26bd DG |
6204 | } |
6205 | ||
d0b96690 | 6206 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
6207 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
6208 | retval = -1; | |
6209 | goto exit_init_data; | |
d0b96690 DG |
6210 | } |
6211 | ||
7972aab2 DG |
6212 | /* Initialize global buffer per UID and PID registry. */ |
6213 | buffer_reg_init_uid_registry(); | |
6214 | buffer_reg_init_pid_registry(); | |
6215 | ||
099e26bd | 6216 | /* Init UST command queue. */ |
8bdee6e2 | 6217 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 6218 | |
273ea72c | 6219 | /* |
4a15001e MD |
6220 | * Get session list pointer. This pointer MUST NOT be free'd. This list |
6221 | * is statically declared in session.c | |
273ea72c | 6222 | */ |
54d01ffb | 6223 | session_list_ptr = session_get_list(); |
b5541356 | 6224 | |
2f77fc4b | 6225 | cmd_init(); |
00e2e675 | 6226 | |
ae9e45b3 DG |
6227 | /* Check for the application socket timeout env variable. */ |
6228 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
6229 | if (env_app_timeout) { | |
6230 | app_socket_timeout = atoi(env_app_timeout); | |
6231 | } else { | |
6232 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
6233 | } | |
6234 | ||
4a15001e MD |
6235 | ret = write_pidfile(); |
6236 | if (ret) { | |
6237 | ERR("Error in write_pidfile"); | |
6238 | retval = -1; | |
6239 | goto exit_init_data; | |
6240 | } | |
6241 | ret = write_agent_port(); | |
6242 | if (ret) { | |
6243 | ERR("Error in write_agent_port"); | |
6244 | retval = -1; | |
6245 | goto exit_init_data; | |
6246 | } | |
35f90c40 | 6247 | |
554831e7 MD |
6248 | /* Initialize communication library */ |
6249 | lttcomm_init(); | |
4a15001e | 6250 | /* Initialize TCP timeout values */ |
d831c249 | 6251 | lttcomm_inet_init(); |
554831e7 | 6252 | |
ef367a93 | 6253 | if (load_session_init_data(&load_info) < 0) { |
4a15001e MD |
6254 | retval = -1; |
6255 | goto exit_init_data; | |
ef367a93 JG |
6256 | } |
6257 | load_info->path = opt_load_session_path; | |
6258 | ||
12b4fb37 | 6259 | /* Create health-check thread. */ |
1a1a34b4 | 6260 | ret = pthread_create(&health_thread, default_pthread_attr(), |
44a5e5eb | 6261 | thread_manage_health, (void *) NULL); |
4a15001e MD |
6262 | if (ret) { |
6263 | errno = ret; | |
44a5e5eb | 6264 | PERROR("pthread_create health"); |
4a15001e | 6265 | retval = -1; |
44a5e5eb DG |
6266 | goto exit_health; |
6267 | } | |
6268 | ||
b3530820 JG |
6269 | /* notification_thread_data acquires the pipes' read side. */ |
6270 | notification_thread_handle = notification_thread_handle_create( | |
6271 | ust32_channel_monitor_pipe, | |
6272 | ust64_channel_monitor_pipe, | |
6273 | kernel_channel_monitor_pipe); | |
6274 | if (!notification_thread_handle) { | |
6275 | retval = -1; | |
6276 | ERR("Failed to create notification thread shared data"); | |
6277 | stop_threads(); | |
6278 | goto exit_notification; | |
6279 | } | |
6280 | ||
6281 | /* Create notification thread. */ | |
6282 | ret = pthread_create(¬ification_thread, default_pthread_attr(), | |
6283 | thread_notification, notification_thread_handle); | |
6284 | if (ret) { | |
6285 | errno = ret; | |
6286 | PERROR("pthread_create notification"); | |
6287 | retval = -1; | |
6288 | stop_threads(); | |
6289 | goto exit_notification; | |
6290 | } | |
6be1a386 | 6291 | notification_thread_running = true; |
b3530820 | 6292 | |
6e0be6cc JD |
6293 | /* rotation_thread_data acquires the pipes' read side. */ |
6294 | rotation_thread_handle = rotation_thread_handle_create( | |
6295 | ust32_channel_rotate_pipe, | |
6296 | ust64_channel_rotate_pipe, | |
6297 | kernel_channel_rotate_pipe, | |
55c2a7f9 JD |
6298 | thread_quit_pipe[0], |
6299 | rotate_timer_pipe[0]); | |
6e0be6cc JD |
6300 | if (!rotation_thread_handle) { |
6301 | retval = -1; | |
6302 | ERR("Failed to create rotation thread shared data"); | |
6303 | stop_threads(); | |
6304 | goto exit_rotation; | |
6305 | } | |
6306 | ||
55c2a7f9 JD |
6307 | /* Create timer thread. */ |
6308 | ret = pthread_create(&timer_thread, default_pthread_attr(), | |
6309 | sessiond_timer_thread, NULL); | |
6310 | if (ret) { | |
6311 | errno = ret; | |
6312 | PERROR("pthread_create timer"); | |
6313 | retval = -1; | |
6314 | stop_threads(); | |
6315 | goto exit_notification; | |
6316 | } | |
6317 | timer_thread_running = true; | |
6318 | ||
6e0be6cc JD |
6319 | /* Create rotation thread. */ |
6320 | ret = pthread_create(&rotation_thread, default_pthread_attr(), | |
6321 | thread_rotation, rotation_thread_handle); | |
6322 | if (ret) { | |
6323 | errno = ret; | |
6324 | PERROR("pthread_create rotation"); | |
6325 | retval = -1; | |
6326 | stop_threads(); | |
6327 | goto exit_rotation; | |
6328 | } | |
6329 | ||
cf3af59e | 6330 | /* Create thread to manage the client socket */ |
1a1a34b4 | 6331 | ret = pthread_create(&client_thread, default_pthread_attr(), |
099e26bd | 6332 | thread_manage_clients, (void *) NULL); |
4a15001e MD |
6333 | if (ret) { |
6334 | errno = ret; | |
76d7553f | 6335 | PERROR("pthread_create clients"); |
4a15001e | 6336 | retval = -1; |
b3530820 | 6337 | stop_threads(); |
cf3af59e MD |
6338 | goto exit_client; |
6339 | } | |
fac6795d | 6340 | |
099e26bd | 6341 | /* Create thread to dispatch registration */ |
1a1a34b4 | 6342 | ret = pthread_create(&dispatch_thread, default_pthread_attr(), |
099e26bd | 6343 | thread_dispatch_ust_registration, (void *) NULL); |
4a15001e MD |
6344 | if (ret) { |
6345 | errno = ret; | |
76d7553f | 6346 | PERROR("pthread_create dispatch"); |
4a15001e | 6347 | retval = -1; |
b3530820 | 6348 | stop_threads(); |
099e26bd DG |
6349 | goto exit_dispatch; |
6350 | } | |
6351 | ||
6352 | /* Create thread to manage application registration. */ | |
1a1a34b4 | 6353 | ret = pthread_create(®_apps_thread, default_pthread_attr(), |
099e26bd | 6354 | thread_registration_apps, (void *) NULL); |
4a15001e MD |
6355 | if (ret) { |
6356 | errno = ret; | |
76d7553f | 6357 | PERROR("pthread_create registration"); |
4a15001e | 6358 | retval = -1; |
b3530820 | 6359 | stop_threads(); |
099e26bd DG |
6360 | goto exit_reg_apps; |
6361 | } | |
6362 | ||
cf3af59e | 6363 | /* Create thread to manage application socket */ |
1a1a34b4 | 6364 | ret = pthread_create(&apps_thread, default_pthread_attr(), |
54d01ffb | 6365 | thread_manage_apps, (void *) NULL); |
4a15001e MD |
6366 | if (ret) { |
6367 | errno = ret; | |
d0b96690 | 6368 | PERROR("pthread_create apps"); |
4a15001e | 6369 | retval = -1; |
b3530820 | 6370 | stop_threads(); |
d0b96690 DG |
6371 | goto exit_apps; |
6372 | } | |
6373 | ||
6374 | /* Create thread to manage application notify socket */ | |
1a1a34b4 | 6375 | ret = pthread_create(&apps_notify_thread, default_pthread_attr(), |
d0b96690 | 6376 | ust_thread_manage_notify, (void *) NULL); |
4a15001e MD |
6377 | if (ret) { |
6378 | errno = ret; | |
f5c32ef1 | 6379 | PERROR("pthread_create notify"); |
4a15001e | 6380 | retval = -1; |
b3530820 | 6381 | stop_threads(); |
9563b0ad | 6382 | goto exit_apps_notify; |
cf3af59e | 6383 | } |
fac6795d | 6384 | |
022d91ba | 6385 | /* Create agent registration thread. */ |
1a1a34b4 | 6386 | ret = pthread_create(&agent_reg_thread, default_pthread_attr(), |
022d91ba | 6387 | agent_thread_manage_registration, (void *) NULL); |
4a15001e MD |
6388 | if (ret) { |
6389 | errno = ret; | |
022d91ba | 6390 | PERROR("pthread_create agent"); |
4a15001e | 6391 | retval = -1; |
b3530820 | 6392 | stop_threads(); |
022d91ba | 6393 | goto exit_agent_reg; |
4d076222 DG |
6394 | } |
6395 | ||
6620da75 DG |
6396 | /* Don't start this thread if kernel tracing is not requested nor root */ |
6397 | if (is_root && !opt_no_kernel) { | |
6398 | /* Create kernel thread to manage kernel event */ | |
1a1a34b4 | 6399 | ret = pthread_create(&kernel_thread, default_pthread_attr(), |
6620da75 | 6400 | thread_manage_kernel, (void *) NULL); |
4a15001e MD |
6401 | if (ret) { |
6402 | errno = ret; | |
6620da75 | 6403 | PERROR("pthread_create kernel"); |
4a15001e | 6404 | retval = -1; |
b3530820 | 6405 | stop_threads(); |
6620da75 DG |
6406 | goto exit_kernel; |
6407 | } | |
ef367a93 | 6408 | } |
7a485870 | 6409 | |
4a15001e | 6410 | /* Create session loading thread. */ |
1a1a34b4 MJ |
6411 | ret = pthread_create(&load_session_thread, default_pthread_attr(), |
6412 | thread_load_session, load_info); | |
4a15001e MD |
6413 | if (ret) { |
6414 | errno = ret; | |
6415 | PERROR("pthread_create load_session_thread"); | |
6416 | retval = -1; | |
b3530820 | 6417 | stop_threads(); |
4a15001e MD |
6418 | goto exit_load_session; |
6419 | } | |
6420 | ||
6421 | /* | |
6422 | * This is where we start awaiting program completion (e.g. through | |
6423 | * signal that asks threads to teardown). | |
6424 | */ | |
6425 | ||
6426 | ret = pthread_join(load_session_thread, &status); | |
6427 | if (ret) { | |
6428 | errno = ret; | |
6429 | PERROR("pthread_join load_session_thread"); | |
6430 | retval = -1; | |
6431 | } | |
6432 | exit_load_session: | |
ef367a93 JG |
6433 | |
6434 | if (is_root && !opt_no_kernel) { | |
6620da75 | 6435 | ret = pthread_join(kernel_thread, &status); |
4a15001e MD |
6436 | if (ret) { |
6437 | errno = ret; | |
6620da75 | 6438 | PERROR("pthread_join"); |
4a15001e | 6439 | retval = -1; |
6620da75 | 6440 | } |
fac6795d | 6441 | } |
cf3af59e | 6442 | exit_kernel: |
4a15001e | 6443 | |
022d91ba | 6444 | ret = pthread_join(agent_reg_thread, &status); |
4a15001e MD |
6445 | if (ret) { |
6446 | errno = ret; | |
022d91ba | 6447 | PERROR("pthread_join agent"); |
4a15001e | 6448 | retval = -1; |
4d076222 | 6449 | } |
022d91ba | 6450 | exit_agent_reg: |
4a15001e | 6451 | |
9563b0ad | 6452 | ret = pthread_join(apps_notify_thread, &status); |
4a15001e MD |
6453 | if (ret) { |
6454 | errno = ret; | |
9563b0ad | 6455 | PERROR("pthread_join apps notify"); |
4a15001e | 6456 | retval = -1; |
9563b0ad | 6457 | } |
9563b0ad | 6458 | exit_apps_notify: |
4a15001e | 6459 | |
cf3af59e | 6460 | ret = pthread_join(apps_thread, &status); |
4a15001e MD |
6461 | if (ret) { |
6462 | errno = ret; | |
9563b0ad | 6463 | PERROR("pthread_join apps"); |
4a15001e | 6464 | retval = -1; |
cf3af59e | 6465 | } |
cf3af59e | 6466 | exit_apps: |
4a15001e | 6467 | |
099e26bd | 6468 | ret = pthread_join(reg_apps_thread, &status); |
4a15001e MD |
6469 | if (ret) { |
6470 | errno = ret; | |
76d7553f | 6471 | PERROR("pthread_join"); |
4a15001e | 6472 | retval = -1; |
099e26bd | 6473 | } |
099e26bd | 6474 | exit_reg_apps: |
4a15001e | 6475 | |
772b8f4d MD |
6476 | /* |
6477 | * Join dispatch thread after joining reg_apps_thread to ensure | |
6478 | * we don't leak applications in the queue. | |
6479 | */ | |
099e26bd | 6480 | ret = pthread_join(dispatch_thread, &status); |
4a15001e MD |
6481 | if (ret) { |
6482 | errno = ret; | |
76d7553f | 6483 | PERROR("pthread_join"); |
4a15001e | 6484 | retval = -1; |
099e26bd | 6485 | } |
099e26bd | 6486 | exit_dispatch: |
4a15001e | 6487 | |
cf3af59e | 6488 | ret = pthread_join(client_thread, &status); |
4a15001e MD |
6489 | if (ret) { |
6490 | errno = ret; | |
76d7553f | 6491 | PERROR("pthread_join"); |
4a15001e | 6492 | retval = -1; |
cf3af59e | 6493 | } |
a88df331 | 6494 | |
b3530820 | 6495 | exit_client: |
6e0be6cc | 6496 | exit_rotation: |
b3530820 | 6497 | exit_notification: |
4a15001e MD |
6498 | ret = pthread_join(health_thread, &status); |
6499 | if (ret) { | |
6500 | errno = ret; | |
6501 | PERROR("pthread_join health thread"); | |
6502 | retval = -1; | |
06f525de DG |
6503 | } |
6504 | ||
b3530820 | 6505 | exit_health: |
4a15001e | 6506 | exit_init_data: |
4d62fbf8 MD |
6507 | /* |
6508 | * Wait for all pending call_rcu work to complete before tearing | |
6509 | * down data structures. call_rcu worker may be trying to | |
6510 | * perform lookups in those structures. | |
6511 | */ | |
6512 | rcu_barrier(); | |
4a15001e MD |
6513 | /* |
6514 | * sessiond_cleanup() is called when no other thread is running, except | |
6515 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
6516 | */ | |
6517 | rcu_thread_online(); | |
6518 | sessiond_cleanup(); | |
06f525de | 6519 | |
c4d5de9d JG |
6520 | /* |
6521 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
6522 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
6523 | * the queue is empty before shutting down the clean-up thread. | |
6524 | */ | |
6525 | rcu_barrier(); | |
6526 | ||
b3530820 JG |
6527 | /* |
6528 | * The teardown of the notification system is performed after the | |
6529 | * session daemon's teardown in order to allow it to be notified | |
6530 | * of the active session and channels at the moment of the teardown. | |
6531 | */ | |
6532 | if (notification_thread_handle) { | |
6be1a386 JG |
6533 | if (notification_thread_running) { |
6534 | notification_thread_command_quit( | |
6535 | notification_thread_handle); | |
6536 | ret = pthread_join(notification_thread, &status); | |
6537 | if (ret) { | |
6538 | errno = ret; | |
6539 | PERROR("pthread_join notification thread"); | |
6540 | retval = -1; | |
6541 | } | |
3dec304b | 6542 | } |
6be1a386 | 6543 | notification_thread_handle_destroy(notification_thread_handle); |
b3530820 JG |
6544 | } |
6545 | ||
6e0be6cc JD |
6546 | if (rotation_thread_handle) { |
6547 | rotation_thread_handle_destroy(rotation_thread_handle); | |
55c2a7f9 JD |
6548 | ret = close(rotate_timer_pipe[0]); |
6549 | if (ret < 0) { | |
6550 | PERROR("Close rotate pending pipe"); | |
6551 | retval = -1; | |
6552 | } | |
6553 | ret = close(rotate_timer_pipe[1]); | |
6554 | if (ret < 0) { | |
6555 | PERROR("Close rotate pending pipe"); | |
6556 | retval = -1; | |
6557 | } | |
6e0be6cc JD |
6558 | } |
6559 | ||
6560 | ret = pthread_join(rotation_thread, &status); | |
6561 | if (ret) { | |
6562 | errno = ret; | |
6563 | PERROR("pthread_join rotation thread"); | |
6564 | retval = -1; | |
6565 | } | |
6566 | ||
55c2a7f9 JD |
6567 | if (timer_thread_running) { |
6568 | ret = pthread_join(timer_thread, &status); | |
6569 | if (ret) { | |
6570 | errno = ret; | |
6571 | PERROR("pthread_join timer thread"); | |
6572 | retval = -1; | |
6573 | } | |
6574 | } | |
6575 | ||
b3530820 JG |
6576 | rcu_thread_offline(); |
6577 | rcu_unregister_thread(); | |
6578 | ||
5e97de00 | 6579 | ret = fini_ht_cleanup_thread(&ht_cleanup_thread); |
4a15001e | 6580 | if (ret) { |
4a15001e | 6581 | retval = -1; |
0b2dc8df | 6582 | } |
b3530820 JG |
6583 | lttng_pipe_destroy(ust32_channel_monitor_pipe); |
6584 | lttng_pipe_destroy(ust64_channel_monitor_pipe); | |
6585 | lttng_pipe_destroy(kernel_channel_monitor_pipe); | |
6e0be6cc JD |
6586 | lttng_pipe_destroy(ust32_channel_rotate_pipe); |
6587 | lttng_pipe_destroy(ust64_channel_rotate_pipe); | |
6588 | lttng_pipe_destroy(kernel_channel_rotate_pipe); | |
0b2dc8df | 6589 | exit_ht_cleanup: |
4a15001e | 6590 | |
4a15001e MD |
6591 | health_app_destroy(health_sessiond); |
6592 | exit_health_sessiond_cleanup: | |
7567352f | 6593 | exit_create_run_as_worker_cleanup: |
4a15001e MD |
6594 | |
6595 | exit_options: | |
6596 | sessiond_cleanup_options(); | |
6597 | ||
6598 | exit_set_signal_handler: | |
6599 | if (!retval) { | |
cf3af59e | 6600 | exit(EXIT_SUCCESS); |
4a15001e MD |
6601 | } else { |
6602 | exit(EXIT_FAILURE); | |
67e40797 | 6603 | } |
fac6795d | 6604 | } |