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