Commit | Line | Data |
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826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
0fdd1e2c | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
26296c48 | 4 | * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 5 | * |
d14d33bf AM |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License, version 2 only, | |
8 | * as published by the Free Software Foundation. | |
91d76f53 | 9 | * |
d14d33bf AM |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
91d76f53 | 14 | * |
d14d33bf AM |
15 | * You should have received a copy of the GNU General Public License along |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
fac6795d DG |
18 | */ |
19 | ||
20 | #define _GNU_SOURCE | |
6c1c0768 | 21 | #define _LGPL_SOURCE |
fac6795d DG |
22 | #include <getopt.h> |
23 | #include <grp.h> | |
24 | #include <limits.h> | |
0bb7724a | 25 | #include <paths.h> |
fac6795d DG |
26 | #include <pthread.h> |
27 | #include <signal.h> | |
28 | #include <stdio.h> | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
331744e3 | 31 | #include <inttypes.h> |
0fdd1e2c | 32 | #include <sys/mman.h> |
b73401da | 33 | #include <sys/mount.h> |
1e307fab | 34 | #include <sys/resource.h> |
fac6795d DG |
35 | #include <sys/socket.h> |
36 | #include <sys/stat.h> | |
37 | #include <sys/types.h> | |
0fdd1e2c | 38 | #include <sys/wait.h> |
5c827ce0 | 39 | #include <urcu/uatomic.h> |
fac6795d | 40 | #include <unistd.h> |
3bd1e081 | 41 | #include <config.h> |
fac6795d | 42 | |
990570ed | 43 | #include <common/common.h> |
d27c42b8 | 44 | #include <common/compat/socket.h> |
e8fa9fb0 | 45 | #include <common/compat/getenv.h> |
db758600 DG |
46 | #include <common/defaults.h> |
47 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 48 | #include <common/futex.h> |
00e2e675 | 49 | #include <common/relayd/relayd.h> |
81b86775 | 50 | #include <common/utils.h> |
3ccdf997 | 51 | #include <common/daemonize.h> |
26296c48 | 52 | #include <common/config/config.h> |
fac6795d | 53 | |
10a8a223 | 54 | #include "lttng-sessiond.h" |
7972aab2 | 55 | #include "buffer-registry.h" |
54d01ffb | 56 | #include "channel.h" |
2f77fc4b | 57 | #include "cmd.h" |
00e2e675 | 58 | #include "consumer.h" |
099e26bd | 59 | #include "context.h" |
54d01ffb | 60 | #include "event.h" |
4771f025 | 61 | #include "kernel.h" |
f1e16794 | 62 | #include "kernel-consumer.h" |
096102bd | 63 | #include "modprobe.h" |
0fdd1e2c | 64 | #include "shm.h" |
1e307fab | 65 | #include "ust-ctl.h" |
00e2e675 | 66 | #include "ust-consumer.h" |
8e68d1c8 | 67 | #include "utils.h" |
4063050c | 68 | #include "fd-limit.h" |
8782cc74 | 69 | #include "health-sessiond.h" |
8ac94142 | 70 | #include "testpoint.h" |
d0b96690 | 71 | #include "ust-thread.h" |
022d91ba | 72 | #include "agent-thread.h" |
fb198a11 | 73 | #include "save.h" |
ef367a93 | 74 | #include "load-session-thread.h" |
834978fd | 75 | #include "syscall.h" |
fac6795d | 76 | |
ebaeda94 MD |
77 | #define CONSUMERD_FILE "lttng-consumerd" |
78 | ||
fac6795d | 79 | const char *progname; |
6c71277b | 80 | static const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
26296c48 JG |
81 | static int tracing_group_name_override; |
82 | static char *opt_pidfile; | |
5b8719f5 | 83 | static int opt_sig_parent; |
97e19046 | 84 | static int opt_verbose_consumer; |
72dd7491 | 85 | static int opt_daemon, opt_background; |
4fba7219 | 86 | static int opt_no_kernel; |
ef367a93 | 87 | static char *opt_load_session_path; |
1d4b027a | 88 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
0bb7724a | 89 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ |
67e40797 | 90 | static char *rundir; |
c9cb3e7d | 91 | static int lockfile_fd = -1; |
3bd1e081 | 92 | |
0bb7724a DG |
93 | /* Set to 1 when a SIGUSR1 signal is received. */ |
94 | static int recv_child_signal; | |
95 | ||
a23ec3a7 DG |
96 | /* |
97 | * Consumer daemon specific control data. Every value not initialized here is | |
98 | * set to 0 by the static definition. | |
99 | */ | |
3bd1e081 MD |
100 | static struct consumer_data kconsumer_data = { |
101 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
102 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
103 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
03550b58 MD |
104 | .err_sock = -1, |
105 | .cmd_sock = -1, | |
173af62f DG |
106 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
107 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
108 | .cond = PTHREAD_COND_INITIALIZER, |
109 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 110 | }; |
7753dea8 MD |
111 | static struct consumer_data ustconsumer64_data = { |
112 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
113 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
114 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
115 | .err_sock = -1, |
116 | .cmd_sock = -1, | |
173af62f DG |
117 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
118 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
119 | .cond = PTHREAD_COND_INITIALIZER, |
120 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
121 | }; |
122 | static struct consumer_data ustconsumer32_data = { | |
123 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
124 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
125 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
126 | .err_sock = -1, |
127 | .cmd_sock = -1, | |
173af62f DG |
128 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
129 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
130 | .cond = PTHREAD_COND_INITIALIZER, |
131 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
132 | }; |
133 | ||
26296c48 JG |
134 | /* Command line options */ |
135 | static const struct option long_options[] = { | |
136 | { "client-sock", 1, 0, 'c' }, | |
137 | { "apps-sock", 1, 0, 'a' }, | |
138 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, | |
139 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
140 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, | |
141 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
142 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, | |
143 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
144 | { "consumerd32-path", 1, 0, 'u' }, | |
145 | { "consumerd32-libdir", 1, 0, 'U' }, | |
146 | { "consumerd64-path", 1, 0, 't' }, | |
147 | { "consumerd64-libdir", 1, 0, 'T' }, | |
148 | { "daemonize", 0, 0, 'd' }, | |
72dd7491 | 149 | { "background", 0, 0, 'b' }, |
26296c48 JG |
150 | { "sig-parent", 0, 0, 'S' }, |
151 | { "help", 0, 0, 'h' }, | |
152 | { "group", 1, 0, 'g' }, | |
153 | { "version", 0, 0, 'V' }, | |
154 | { "quiet", 0, 0, 'q' }, | |
155 | { "verbose", 0, 0, 'v' }, | |
156 | { "verbose-consumer", 0, 0, 'Z' }, | |
157 | { "no-kernel", 0, 0, 'N' }, | |
158 | { "pidfile", 1, 0, 'p' }, | |
1b2ef7fe | 159 | { "agent-tcp-port", 1, 0, 'J' }, |
26296c48 | 160 | { "config", 1, 0, 'f' }, |
ef367a93 | 161 | { "load", 1, 0, 'l' }, |
fbb9748b | 162 | { "kmod-probes", 1, 0, 'P' }, |
c9d42407 | 163 | { "extra-kmod-probes", 1, 0, 'e' }, |
26296c48 JG |
164 | { NULL, 0, 0, 0 } |
165 | }; | |
166 | ||
167 | /* Command line options to ignore from configuration file */ | |
168 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
169 | ||
26c9d55e | 170 | /* Shared between threads */ |
099e26bd | 171 | static int dispatch_thread_exit; |
fac6795d | 172 | |
54d01ffb DG |
173 | /* Global application Unix socket path */ |
174 | static char apps_unix_sock_path[PATH_MAX]; | |
175 | /* Global client Unix socket path */ | |
176 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
177 | /* global wait shm path for UST */ |
178 | static char wait_shm_path[PATH_MAX]; | |
44a5e5eb DG |
179 | /* Global health check unix path */ |
180 | static char health_unix_sock_path[PATH_MAX]; | |
fac6795d | 181 | |
1d4b027a | 182 | /* Sockets and FDs */ |
a4b35e07 MD |
183 | static int client_sock = -1; |
184 | static int apps_sock = -1; | |
2f77fc4b | 185 | int kernel_tracer_fd = -1; |
76d7553f | 186 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 187 | |
273ea72c DG |
188 | /* |
189 | * Quit pipe for all threads. This permits a single cancellation point | |
190 | * for all threads when receiving an event on the pipe. | |
191 | */ | |
76d7553f | 192 | static int thread_quit_pipe[2] = { -1, -1 }; |
4a15001e | 193 | static int ht_cleanup_quit_pipe[2] = { -1, -1 }; |
273ea72c | 194 | |
099e26bd DG |
195 | /* |
196 | * This pipe is used to inform the thread managing application communication | |
197 | * that a command is queued and ready to be processed. | |
198 | */ | |
76d7553f | 199 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 200 | |
d0b96690 DG |
201 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
202 | ||
1d4b027a | 203 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 204 | static pthread_t apps_thread; |
d0b96690 | 205 | static pthread_t apps_notify_thread; |
099e26bd | 206 | static pthread_t reg_apps_thread; |
1d4b027a | 207 | static pthread_t client_thread; |
7a485870 | 208 | static pthread_t kernel_thread; |
099e26bd | 209 | static pthread_t dispatch_thread; |
44a5e5eb | 210 | static pthread_t health_thread; |
0b2dc8df | 211 | static pthread_t ht_cleanup_thread; |
022d91ba | 212 | static pthread_t agent_reg_thread; |
ef367a93 | 213 | static pthread_t load_session_thread; |
5eb91c98 | 214 | |
099e26bd DG |
215 | /* |
216 | * UST registration command queue. This queue is tied with a futex and uses a N | |
217 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
218 | * | |
b22c5da8 DG |
219 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
220 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
221 | * the line new application socket and monitors it for any I/O error or clean | |
222 | * close that triggers an unregistration of the application. | |
099e26bd DG |
223 | */ |
224 | static struct ust_cmd_queue ust_cmd_queue; | |
225 | ||
b5541356 DG |
226 | /* |
227 | * Pointer initialized before thread creation. | |
228 | * | |
229 | * This points to the tracing session list containing the session count and a | |
230 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
231 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 232 | * |
d063d709 | 233 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 234 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
235 | */ |
236 | static struct ltt_session_list *session_list_ptr; | |
237 | ||
7753dea8 MD |
238 | int ust_consumerd64_fd = -1; |
239 | int ust_consumerd32_fd = -1; | |
240 | ||
fb6f1fa2 YB |
241 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
242 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
243 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
244 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
26296c48 JG |
245 | static int consumerd32_bin_override; |
246 | static int consumerd64_bin_override; | |
247 | static int consumerd32_libdir_override; | |
248 | static int consumerd64_libdir_override; | |
fb09408a | 249 | |
2f77fc4b DG |
250 | static const char *module_proc_lttng = "/proc/lttng"; |
251 | ||
5c827ce0 DG |
252 | /* |
253 | * Consumer daemon state which is changed when spawning it, killing it or in | |
254 | * case of a fatal error. | |
255 | */ | |
256 | enum consumerd_state { | |
257 | CONSUMER_STARTED = 1, | |
258 | CONSUMER_STOPPED = 2, | |
259 | CONSUMER_ERROR = 3, | |
260 | }; | |
261 | ||
262 | /* | |
263 | * This consumer daemon state is used to validate if a client command will be | |
264 | * able to reach the consumer. If not, the client is informed. For instance, | |
265 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
266 | * error to the client. | |
267 | * | |
268 | * The following example shows a possible race condition of this scheme: | |
269 | * | |
270 | * consumer thread error happens | |
271 | * client cmd arrives | |
272 | * client cmd checks state -> still OK | |
273 | * consumer thread exit, sets error | |
274 | * client cmd try to talk to consumer | |
275 | * ... | |
276 | * | |
277 | * However, since the consumer is a different daemon, we have no way of making | |
278 | * sure the command will reach it safely even with this state flag. This is why | |
279 | * we consider that up to the state validation during command processing, the | |
280 | * command is safe. After that, we can not guarantee the correctness of the | |
281 | * client request vis-a-vis the consumer. | |
282 | */ | |
283 | static enum consumerd_state ust_consumerd_state; | |
284 | static enum consumerd_state kernel_consumerd_state; | |
285 | ||
ae9e45b3 DG |
286 | /* |
287 | * Socket timeout for receiving and sending in seconds. | |
288 | */ | |
289 | static int app_socket_timeout; | |
290 | ||
12744796 DG |
291 | /* Set in main() with the current page size. */ |
292 | long page_size; | |
293 | ||
8782cc74 MD |
294 | /* Application health monitoring */ |
295 | struct health_app *health_sessiond; | |
296 | ||
022d91ba DG |
297 | /* Agent TCP port for registration. Used by the agent thread. */ |
298 | unsigned int agent_tcp_port = DEFAULT_AGENT_TCP_PORT; | |
4d076222 | 299 | |
f43f95a9 DG |
300 | /* Am I root or not. */ |
301 | int is_root; /* Set to 1 if the daemon is running as root */ | |
302 | ||
26296c48 JG |
303 | const char * const config_section_name = "sessiond"; |
304 | ||
ef367a93 JG |
305 | /* Load session thread information to operate. */ |
306 | struct load_session_thread_data *load_info; | |
307 | ||
97bc1426 MD |
308 | /* |
309 | * Whether sessiond is ready for commands/health check requests. | |
310 | * NR_LTTNG_SESSIOND_READY must match the number of calls to | |
ef367a93 | 311 | * sessiond_notify_ready(). |
97bc1426 | 312 | */ |
ef367a93 | 313 | #define NR_LTTNG_SESSIOND_READY 3 |
97bc1426 MD |
314 | int lttng_sessiond_ready = NR_LTTNG_SESSIOND_READY; |
315 | ||
316 | /* Notify parents that we are ready for cmd and health check */ | |
ef367a93 JG |
317 | LTTNG_HIDDEN |
318 | void sessiond_notify_ready(void) | |
97bc1426 MD |
319 | { |
320 | if (uatomic_sub_return(<tng_sessiond_ready, 1) == 0) { | |
321 | /* | |
322 | * Notify parent pid that we are ready to accept command | |
323 | * for client side. This ppid is the one from the | |
324 | * external process that spawned us. | |
325 | */ | |
326 | if (opt_sig_parent) { | |
327 | kill(ppid, SIGUSR1); | |
328 | } | |
329 | ||
330 | /* | |
331 | * Notify the parent of the fork() process that we are | |
332 | * ready. | |
333 | */ | |
72dd7491 | 334 | if (opt_daemon || opt_background) { |
97bc1426 MD |
335 | kill(child_ppid, SIGUSR1); |
336 | } | |
337 | } | |
338 | } | |
339 | ||
fb09408a | 340 | static |
7753dea8 | 341 | void setup_consumerd_path(void) |
fb09408a | 342 | { |
fc7a59ce | 343 | const char *bin, *libdir; |
fb09408a | 344 | |
7753dea8 MD |
345 | /* |
346 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
347 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
348 | * has not been defined. | |
7753dea8 | 349 | */ |
ebaeda94 | 350 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
351 | if (!consumerd32_bin[0]) { |
352 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
353 | } |
354 | if (!consumerd32_libdir[0]) { | |
355 | consumerd32_libdir = INSTALL_LIB_PATH; | |
356 | } | |
357 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
358 | if (!consumerd64_bin[0]) { |
359 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 360 | } |
ebaeda94 MD |
361 | if (!consumerd64_libdir[0]) { |
362 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
363 | } |
364 | #else | |
365 | #error "Unknown bitness" | |
366 | #endif | |
367 | ||
fb09408a MD |
368 | /* |
369 | * runtime env. var. overrides the build default. | |
370 | */ | |
e8fa9fb0 | 371 | bin = lttng_secure_getenv("LTTNG_CONSUMERD32_BIN"); |
fc7a59ce AM |
372 | if (bin) { |
373 | consumerd32_bin = bin; | |
7753dea8 | 374 | } |
e8fa9fb0 | 375 | bin = lttng_secure_getenv("LTTNG_CONSUMERD64_BIN"); |
fc7a59ce AM |
376 | if (bin) { |
377 | consumerd64_bin = bin; | |
ebaeda94 | 378 | } |
e8fa9fb0 | 379 | libdir = lttng_secure_getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
380 | if (libdir) { |
381 | consumerd32_libdir = libdir; | |
382 | } | |
e8fa9fb0 | 383 | libdir = lttng_secure_getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
384 | if (libdir) { |
385 | consumerd64_libdir = libdir; | |
fb09408a MD |
386 | } |
387 | } | |
388 | ||
4a15001e MD |
389 | static |
390 | int __sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size, | |
391 | int *a_pipe) | |
5eb91c98 DG |
392 | { |
393 | int ret; | |
394 | ||
d0b96690 | 395 | assert(events); |
5eb91c98 DG |
396 | |
397 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
398 | if (ret < 0) { | |
399 | goto error; | |
400 | } | |
401 | ||
402 | /* Add quit pipe */ | |
4a15001e | 403 | ret = lttng_poll_add(events, a_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
404 | if (ret < 0) { |
405 | goto error; | |
406 | } | |
407 | ||
408 | return 0; | |
409 | ||
410 | error: | |
411 | return ret; | |
412 | } | |
413 | ||
4a15001e MD |
414 | /* |
415 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
416 | */ | |
417 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) | |
418 | { | |
419 | return __sessiond_set_thread_pollset(events, size, thread_quit_pipe); | |
420 | } | |
421 | ||
422 | /* | |
423 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
424 | */ | |
425 | int sessiond_set_ht_cleanup_thread_pollset(struct lttng_poll_event *events, | |
426 | size_t size) | |
427 | { | |
428 | return __sessiond_set_thread_pollset(events, size, | |
429 | ht_cleanup_quit_pipe); | |
430 | } | |
431 | ||
432 | static | |
433 | int __sessiond_check_thread_quit_pipe(int fd, uint32_t events, int a_pipe) | |
434 | { | |
435 | if (fd == a_pipe && (events & LPOLLIN)) { | |
436 | return 1; | |
437 | } | |
438 | return 0; | |
439 | } | |
440 | ||
5eb91c98 DG |
441 | /* |
442 | * Check if the thread quit pipe was triggered. | |
443 | * | |
444 | * Return 1 if it was triggered else 0; | |
445 | */ | |
d0b96690 | 446 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
5eb91c98 | 447 | { |
4a15001e MD |
448 | return __sessiond_check_thread_quit_pipe(fd, events, |
449 | thread_quit_pipe[0]); | |
450 | } | |
5eb91c98 | 451 | |
4a15001e MD |
452 | /* |
453 | * Check if the ht_cleanup thread quit pipe was triggered. | |
454 | * | |
455 | * Return 1 if it was triggered else 0; | |
456 | */ | |
457 | int sessiond_check_ht_cleanup_quit(int fd, uint32_t events) | |
458 | { | |
459 | return __sessiond_check_thread_quit_pipe(fd, events, | |
460 | ht_cleanup_quit_pipe[0]); | |
5eb91c98 DG |
461 | } |
462 | ||
273ea72c | 463 | /* |
5eb91c98 | 464 | * Init thread quit pipe. |
273ea72c DG |
465 | * |
466 | * Return -1 on error or 0 if all pipes are created. | |
467 | */ | |
4a15001e | 468 | static int __init_thread_quit_pipe(int *a_pipe) |
273ea72c | 469 | { |
730389d9 | 470 | int ret, i; |
273ea72c | 471 | |
4a15001e | 472 | ret = pipe(a_pipe); |
273ea72c | 473 | if (ret < 0) { |
730389d9 | 474 | PERROR("thread quit pipe"); |
273ea72c DG |
475 | goto error; |
476 | } | |
477 | ||
730389d9 | 478 | for (i = 0; i < 2; i++) { |
4a15001e | 479 | ret = fcntl(a_pipe[i], F_SETFD, FD_CLOEXEC); |
730389d9 DG |
480 | if (ret < 0) { |
481 | PERROR("fcntl"); | |
482 | goto error; | |
483 | } | |
484 | } | |
485 | ||
273ea72c DG |
486 | error: |
487 | return ret; | |
488 | } | |
489 | ||
4a15001e MD |
490 | static int init_thread_quit_pipe(void) |
491 | { | |
492 | return __init_thread_quit_pipe(thread_quit_pipe); | |
493 | } | |
494 | ||
495 | static int init_ht_cleanup_quit_pipe(void) | |
496 | { | |
497 | return __init_thread_quit_pipe(ht_cleanup_quit_pipe); | |
498 | } | |
499 | ||
099e26bd DG |
500 | /* |
501 | * Stop all threads by closing the thread quit pipe. | |
502 | */ | |
cf3af59e MD |
503 | static void stop_threads(void) |
504 | { | |
5eb91c98 DG |
505 | int ret; |
506 | ||
cf3af59e MD |
507 | /* Stopping all threads */ |
508 | DBG("Terminating all threads"); | |
54d01ffb | 509 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
510 | if (ret < 0) { |
511 | ERR("write error on thread quit pipe"); | |
512 | } | |
513 | ||
099e26bd | 514 | /* Dispatch thread */ |
26c9d55e | 515 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 516 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
517 | } |
518 | ||
e975f9f8 DG |
519 | /* |
520 | * Close every consumer sockets. | |
521 | */ | |
522 | static void close_consumer_sockets(void) | |
523 | { | |
524 | int ret; | |
525 | ||
526 | if (kconsumer_data.err_sock >= 0) { | |
527 | ret = close(kconsumer_data.err_sock); | |
528 | if (ret < 0) { | |
529 | PERROR("kernel consumer err_sock close"); | |
530 | } | |
531 | } | |
532 | if (ustconsumer32_data.err_sock >= 0) { | |
533 | ret = close(ustconsumer32_data.err_sock); | |
534 | if (ret < 0) { | |
a76cbd9f | 535 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
536 | } |
537 | } | |
538 | if (ustconsumer64_data.err_sock >= 0) { | |
539 | ret = close(ustconsumer64_data.err_sock); | |
540 | if (ret < 0) { | |
a76cbd9f | 541 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
542 | } |
543 | } | |
544 | if (kconsumer_data.cmd_sock >= 0) { | |
545 | ret = close(kconsumer_data.cmd_sock); | |
546 | if (ret < 0) { | |
547 | PERROR("kernel consumer cmd_sock close"); | |
548 | } | |
549 | } | |
550 | if (ustconsumer32_data.cmd_sock >= 0) { | |
551 | ret = close(ustconsumer32_data.cmd_sock); | |
552 | if (ret < 0) { | |
a76cbd9f | 553 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
554 | } |
555 | } | |
556 | if (ustconsumer64_data.cmd_sock >= 0) { | |
557 | ret = close(ustconsumer64_data.cmd_sock); | |
558 | if (ret < 0) { | |
a76cbd9f | 559 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
560 | } |
561 | } | |
562 | } | |
563 | ||
c9cb3e7d JG |
564 | /* |
565 | * Generate the full lock file path using the rundir. | |
566 | * | |
567 | * Return the snprintf() return value thus a negative value is an error. | |
568 | */ | |
569 | static int generate_lock_file_path(char *path, size_t len) | |
570 | { | |
571 | int ret; | |
572 | ||
573 | assert(path); | |
574 | assert(rundir); | |
575 | ||
576 | /* Build lockfile path from rundir. */ | |
577 | ret = snprintf(path, len, "%s/" DEFAULT_LTTNG_SESSIOND_LOCKFILE, rundir); | |
578 | if (ret < 0) { | |
579 | PERROR("snprintf lockfile path"); | |
580 | } | |
581 | ||
582 | return ret; | |
583 | } | |
584 | ||
fac6795d | 585 | /* |
4a15001e | 586 | * Cleanup the session daemon's data structures. |
fac6795d | 587 | */ |
4a15001e | 588 | static void sessiond_cleanup(void) |
fac6795d | 589 | { |
ef599319 | 590 | int ret; |
af9737e9 | 591 | struct ltt_session *sess, *stmp; |
8c6c56c2 | 592 | char path[PATH_MAX]; |
fac6795d | 593 | |
4a15001e | 594 | DBG("Cleanup sessiond"); |
e07ae692 | 595 | |
4e449f3f MD |
596 | /* |
597 | * Close the thread quit pipe. It has already done its job, | |
598 | * since we are now called. | |
599 | */ | |
2f77fc4b DG |
600 | utils_close_pipe(thread_quit_pipe); |
601 | ||
35f90c40 DG |
602 | /* |
603 | * If opt_pidfile is undefined, the default file will be wiped when | |
604 | * removing the rundir. | |
605 | */ | |
606 | if (opt_pidfile) { | |
607 | ret = remove(opt_pidfile); | |
608 | if (ret < 0) { | |
609 | PERROR("remove pidfile %s", opt_pidfile); | |
610 | } | |
611 | } | |
612 | ||
8c6c56c2 MD |
613 | DBG("Removing sessiond and consumerd content of directory %s", rundir); |
614 | ||
615 | /* sessiond */ | |
616 | snprintf(path, PATH_MAX, | |
617 | "%s/%s", | |
618 | rundir, DEFAULT_LTTNG_SESSIOND_PIDFILE); | |
619 | DBG("Removing %s", path); | |
620 | (void) unlink(path); | |
621 | ||
cd9290dd | 622 | snprintf(path, PATH_MAX, "%s/%s", rundir, |
022d91ba | 623 | DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE); |
cd9290dd DG |
624 | DBG("Removing %s", path); |
625 | (void) unlink(path); | |
626 | ||
8c6c56c2 MD |
627 | /* kconsumerd */ |
628 | snprintf(path, PATH_MAX, | |
629 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, | |
630 | rundir); | |
631 | DBG("Removing %s", path); | |
632 | (void) unlink(path); | |
633 | ||
634 | snprintf(path, PATH_MAX, | |
635 | DEFAULT_KCONSUMERD_PATH, | |
636 | rundir); | |
637 | DBG("Removing directory %s", path); | |
638 | (void) rmdir(path); | |
639 | ||
640 | /* ust consumerd 32 */ | |
641 | snprintf(path, PATH_MAX, | |
642 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, | |
643 | rundir); | |
644 | DBG("Removing %s", path); | |
645 | (void) unlink(path); | |
646 | ||
647 | snprintf(path, PATH_MAX, | |
648 | DEFAULT_USTCONSUMERD32_PATH, | |
649 | rundir); | |
650 | DBG("Removing directory %s", path); | |
651 | (void) rmdir(path); | |
652 | ||
653 | /* ust consumerd 64 */ | |
654 | snprintf(path, PATH_MAX, | |
655 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, | |
656 | rundir); | |
657 | DBG("Removing %s", path); | |
658 | (void) unlink(path); | |
659 | ||
660 | snprintf(path, PATH_MAX, | |
661 | DEFAULT_USTCONSUMERD64_PATH, | |
662 | rundir); | |
663 | DBG("Removing directory %s", path); | |
664 | (void) rmdir(path); | |
5461b305 | 665 | |
99bab54f | 666 | DBG("Cleaning up all sessions"); |
fac6795d | 667 | |
b5541356 | 668 | /* Destroy session list mutex */ |
273ea72c DG |
669 | if (session_list_ptr != NULL) { |
670 | pthread_mutex_destroy(&session_list_ptr->lock); | |
671 | ||
672 | /* Cleanup ALL session */ | |
54d01ffb DG |
673 | cds_list_for_each_entry_safe(sess, stmp, |
674 | &session_list_ptr->head, list) { | |
2f77fc4b | 675 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
676 | } |
677 | } | |
678 | ||
099e26bd | 679 | DBG("Closing all UST sockets"); |
56fff090 | 680 | ust_app_clean_list(); |
7972aab2 | 681 | buffer_reg_destroy_registries(); |
099e26bd | 682 | |
4fba7219 DG |
683 | if (is_root && !opt_no_kernel) { |
684 | DBG2("Closing kernel fd"); | |
a4b35e07 | 685 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
686 | ret = close(kernel_tracer_fd); |
687 | if (ret) { | |
688 | PERROR("close"); | |
689 | } | |
a4b35e07 | 690 | } |
2f50c8a3 | 691 | DBG("Unloading kernel modules"); |
096102bd | 692 | modprobe_remove_lttng_all(); |
834978fd | 693 | free(syscall_table); |
2f50c8a3 | 694 | } |
2f77fc4b | 695 | |
e975f9f8 DG |
696 | close_consumer_sockets(); |
697 | ||
ef367a93 JG |
698 | if (load_info) { |
699 | load_session_destroy_data(load_info); | |
700 | free(load_info); | |
701 | } | |
702 | ||
c9cb3e7d JG |
703 | /* |
704 | * Cleanup lock file by deleting it and finaly closing it which will | |
705 | * release the file system lock. | |
706 | */ | |
707 | if (lockfile_fd >= 0) { | |
708 | char lockfile_path[PATH_MAX]; | |
709 | ||
4a15001e MD |
710 | ret = generate_lock_file_path(lockfile_path, |
711 | sizeof(lockfile_path)); | |
c9cb3e7d JG |
712 | if (ret > 0) { |
713 | ret = remove(lockfile_path); | |
714 | if (ret < 0) { | |
715 | PERROR("remove lock file"); | |
716 | } | |
717 | ret = close(lockfile_fd); | |
718 | if (ret < 0) { | |
719 | PERROR("close lock file"); | |
720 | } | |
721 | } | |
722 | } | |
723 | ||
724 | /* | |
725 | * We do NOT rmdir rundir because there are other processes | |
726 | * using it, for instance lttng-relayd, which can start in | |
727 | * parallel with this teardown. | |
728 | */ | |
729 | ||
730 | free(rundir); | |
4a15001e MD |
731 | } |
732 | ||
733 | /* | |
734 | * Cleanup the daemon's option data structures. | |
735 | */ | |
736 | static void sessiond_cleanup_options(void) | |
737 | { | |
738 | DBG("Cleaning up options"); | |
739 | ||
740 | /* | |
741 | * If the override option is set, the pointer points to a *non* const | |
742 | * thus freeing it even though the variable type is set to const. | |
743 | */ | |
744 | if (tracing_group_name_override) { | |
745 | free((void *) tracing_group_name); | |
746 | } | |
747 | if (consumerd32_bin_override) { | |
748 | free((void *) consumerd32_bin); | |
749 | } | |
750 | if (consumerd64_bin_override) { | |
751 | free((void *) consumerd64_bin); | |
752 | } | |
753 | if (consumerd32_libdir_override) { | |
754 | free((void *) consumerd32_libdir); | |
755 | } | |
756 | if (consumerd64_libdir_override) { | |
757 | free((void *) consumerd64_libdir); | |
758 | } | |
759 | ||
760 | free(opt_pidfile); | |
761 | free(opt_load_session_path); | |
762 | free(kmod_probes_list); | |
763 | free(kmod_extra_probes_list); | |
c9cb3e7d | 764 | |
421cb601 | 765 | /* <fun> */ |
f56a39af | 766 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
767 | "Matthew, BEET driven development works!%c[%dm", |
768 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
769 | /* </fun> */ | |
fac6795d DG |
770 | } |
771 | ||
e065084a | 772 | /* |
d063d709 | 773 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 774 | * |
d063d709 | 775 | * Return lttcomm error code. |
e065084a DG |
776 | */ |
777 | static int send_unix_sock(int sock, void *buf, size_t len) | |
778 | { | |
779 | /* Check valid length */ | |
c617c0c6 | 780 | if (len == 0) { |
e065084a DG |
781 | return -1; |
782 | } | |
783 | ||
784 | return lttcomm_send_unix_sock(sock, buf, len); | |
785 | } | |
786 | ||
5461b305 | 787 | /* |
d063d709 | 788 | * Free memory of a command context structure. |
5461b305 | 789 | */ |
a2fb29a5 | 790 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 791 | { |
a2fb29a5 DG |
792 | DBG("Clean command context structure"); |
793 | if (*cmd_ctx) { | |
794 | if ((*cmd_ctx)->llm) { | |
795 | free((*cmd_ctx)->llm); | |
5461b305 | 796 | } |
a2fb29a5 DG |
797 | if ((*cmd_ctx)->lsm) { |
798 | free((*cmd_ctx)->lsm); | |
5461b305 | 799 | } |
a2fb29a5 DG |
800 | free(*cmd_ctx); |
801 | *cmd_ctx = NULL; | |
5461b305 DG |
802 | } |
803 | } | |
804 | ||
fac6795d | 805 | /* |
0fdd1e2c | 806 | * Notify UST applications using the shm mmap futex. |
fac6795d | 807 | */ |
0fdd1e2c | 808 | static int notify_ust_apps(int active) |
fac6795d | 809 | { |
0fdd1e2c | 810 | char *wait_shm_mmap; |
fac6795d | 811 | |
0fdd1e2c | 812 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 813 | |
0fdd1e2c DG |
814 | /* See shm.c for this call implying mmap, shm and futex calls */ |
815 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
816 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
817 | goto error; |
818 | } | |
819 | ||
0fdd1e2c DG |
820 | /* Wake waiting process */ |
821 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
822 | ||
823 | /* Apps notified successfully */ | |
824 | return 0; | |
fac6795d DG |
825 | |
826 | error: | |
0fdd1e2c | 827 | return -1; |
fac6795d DG |
828 | } |
829 | ||
e065084a | 830 | /* |
d063d709 DG |
831 | * Setup the outgoing data buffer for the response (llm) by allocating the |
832 | * right amount of memory and copying the original information from the lsm | |
833 | * structure. | |
ca95a216 | 834 | * |
d063d709 | 835 | * Return total size of the buffer pointed by buf. |
ca95a216 | 836 | */ |
5461b305 | 837 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 838 | { |
f3ed775e | 839 | int ret, buf_size; |
ca95a216 | 840 | |
f3ed775e | 841 | buf_size = size; |
5461b305 | 842 | |
ba7f0ae5 | 843 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 844 | if (cmd_ctx->llm == NULL) { |
76d7553f | 845 | PERROR("zmalloc"); |
5461b305 | 846 | ret = -ENOMEM; |
ca95a216 DG |
847 | goto error; |
848 | } | |
849 | ||
5461b305 DG |
850 | /* Copy common data */ |
851 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 852 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 853 | |
5461b305 DG |
854 | cmd_ctx->llm->data_size = size; |
855 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
856 | ||
ca95a216 DG |
857 | return buf_size; |
858 | ||
859 | error: | |
860 | return ret; | |
861 | } | |
862 | ||
7a485870 | 863 | /* |
5eb91c98 | 864 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 865 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 866 | */ |
5eb91c98 | 867 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 868 | { |
5eb91c98 | 869 | int ret; |
7a485870 DG |
870 | struct ltt_session *session; |
871 | struct ltt_kernel_channel *channel; | |
872 | ||
5eb91c98 | 873 | DBG("Updating kernel poll set"); |
7a485870 | 874 | |
54d01ffb | 875 | session_lock_list(); |
b5541356 | 876 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 877 | session_lock(session); |
7a485870 | 878 | if (session->kernel_session == NULL) { |
54d01ffb | 879 | session_unlock(session); |
7a485870 DG |
880 | continue; |
881 | } | |
7a485870 | 882 | |
54d01ffb DG |
883 | cds_list_for_each_entry(channel, |
884 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
885 | /* Add channel fd to the kernel poll set */ |
886 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
887 | if (ret < 0) { | |
54d01ffb | 888 | session_unlock(session); |
5eb91c98 DG |
889 | goto error; |
890 | } | |
891 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 892 | } |
54d01ffb | 893 | session_unlock(session); |
7a485870 | 894 | } |
54d01ffb | 895 | session_unlock_list(); |
7a485870 | 896 | |
5eb91c98 | 897 | return 0; |
7a485870 DG |
898 | |
899 | error: | |
54d01ffb | 900 | session_unlock_list(); |
7a485870 DG |
901 | return -1; |
902 | } | |
903 | ||
904 | /* | |
54d01ffb | 905 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 906 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 907 | * |
d063d709 | 908 | * Useful for CPU hotplug feature. |
7a485870 | 909 | */ |
2bdd86d4 | 910 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
911 | { |
912 | int ret = 0; | |
913 | struct ltt_session *session; | |
173af62f | 914 | struct ltt_kernel_session *ksess; |
7a485870 DG |
915 | struct ltt_kernel_channel *channel; |
916 | ||
917 | DBG("Updating kernel streams for channel fd %d", fd); | |
918 | ||
54d01ffb | 919 | session_lock_list(); |
b5541356 | 920 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 921 | session_lock(session); |
7a485870 | 922 | if (session->kernel_session == NULL) { |
54d01ffb | 923 | session_unlock(session); |
7a485870 DG |
924 | continue; |
925 | } | |
173af62f | 926 | ksess = session->kernel_session; |
d9800920 | 927 | |
4a15001e MD |
928 | cds_list_for_each_entry(channel, |
929 | &ksess->channel_list.head, list) { | |
930 | struct lttng_ht_iter iter; | |
931 | struct consumer_socket *socket; | |
d9800920 | 932 | |
4a15001e MD |
933 | if (channel->fd != fd) { |
934 | continue; | |
935 | } | |
936 | DBG("Channel found, updating kernel streams"); | |
937 | ret = kernel_open_channel_stream(channel); | |
938 | if (ret < 0) { | |
939 | goto error; | |
940 | } | |
941 | /* Update the stream global counter */ | |
942 | ksess->stream_count_global += ret; | |
943 | ||
944 | /* | |
945 | * Have we already sent fds to the consumer? If yes, it | |
946 | * means that tracing is started so it is safe to send | |
947 | * our updated stream fds. | |
948 | */ | |
949 | if (ksess->consumer_fds_sent != 1 | |
950 | || ksess->consumer == NULL) { | |
951 | ret = -1; | |
952 | goto error; | |
953 | } | |
954 | ||
955 | rcu_read_lock(); | |
956 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
957 | &iter.iter, socket, node.node) { | |
958 | pthread_mutex_lock(socket->lock); | |
959 | ret = kernel_consumer_send_channel_stream(socket, | |
960 | channel, ksess, | |
961 | session->output_traces ? 1 : 0); | |
962 | pthread_mutex_unlock(socket->lock); | |
963 | if (ret < 0) { | |
e7fe706f | 964 | rcu_read_unlock(); |
4a15001e | 965 | goto error; |
7a485870 | 966 | } |
7a485870 | 967 | } |
4a15001e | 968 | rcu_read_unlock(); |
7a485870 | 969 | } |
54d01ffb | 970 | session_unlock(session); |
7a485870 | 971 | } |
54d01ffb | 972 | session_unlock_list(); |
b3c750d2 | 973 | return ret; |
7a485870 | 974 | |
b3c750d2 | 975 | error: |
54d01ffb DG |
976 | session_unlock(session); |
977 | session_unlock_list(); | |
7a485870 DG |
978 | return ret; |
979 | } | |
980 | ||
487cf67c | 981 | /* |
ffe60014 DG |
982 | * For each tracing session, update newly registered apps. The session list |
983 | * lock MUST be acquired before calling this. | |
487cf67c DG |
984 | */ |
985 | static void update_ust_app(int app_sock) | |
986 | { | |
987 | struct ltt_session *sess, *stmp; | |
988 | ||
fdadac08 DG |
989 | /* Consumer is in an ERROR state. Stop any application update. */ |
990 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
991 | /* Stop the update process since the consumer is dead. */ | |
992 | return; | |
993 | } | |
994 | ||
487cf67c DG |
995 | /* For all tracing session(s) */ |
996 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 997 | session_lock(sess); |
421cb601 DG |
998 | if (sess->ust_session) { |
999 | ust_app_global_update(sess->ust_session, app_sock); | |
1000 | } | |
4ee14516 | 1001 | session_unlock(sess); |
487cf67c DG |
1002 | } |
1003 | } | |
1004 | ||
7a485870 | 1005 | /* |
d063d709 | 1006 | * This thread manage event coming from the kernel. |
7a485870 | 1007 | * |
d063d709 DG |
1008 | * Features supported in this thread: |
1009 | * -) CPU Hotplug | |
7a485870 DG |
1010 | */ |
1011 | static void *thread_manage_kernel(void *data) | |
1012 | { | |
139ac872 | 1013 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 1014 | uint32_t revents, nb_fd; |
7a485870 | 1015 | char tmp; |
5eb91c98 | 1016 | struct lttng_poll_event events; |
7a485870 | 1017 | |
6993eeb3 | 1018 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 1019 | |
6c71277b | 1020 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 1021 | |
d5d63bf1 DG |
1022 | /* |
1023 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 1024 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 1025 | */ |
6d737ce4 | 1026 | lttng_poll_init(&events); |
d5d63bf1 | 1027 | |
e547b070 | 1028 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
1029 | goto error_testpoint; |
1030 | } | |
8ac94142 | 1031 | |
840cb59c | 1032 | health_code_update(); |
44a5e5eb | 1033 | |
e547b070 | 1034 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 1035 | goto error_testpoint; |
6993eeb3 CB |
1036 | } |
1037 | ||
7a485870 | 1038 | while (1) { |
840cb59c | 1039 | health_code_update(); |
44a5e5eb | 1040 | |
7a485870 | 1041 | if (update_poll_flag == 1) { |
d21b0d71 DG |
1042 | /* Clean events object. We are about to populate it again. */ |
1043 | lttng_poll_clean(&events); | |
1044 | ||
d0b96690 | 1045 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
1046 | if (ret < 0) { |
1047 | goto error_poll_create; | |
1048 | } | |
1049 | ||
1050 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
1051 | if (ret < 0) { | |
1052 | goto error; | |
1053 | } | |
5f822d0a | 1054 | |
d21b0d71 | 1055 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
1056 | ret = update_kernel_poll(&events); |
1057 | if (ret < 0) { | |
7a485870 DG |
1058 | goto error; |
1059 | } | |
1060 | update_poll_flag = 0; | |
1061 | } | |
1062 | ||
7fa2082e | 1063 | DBG("Thread kernel polling"); |
7a485870 DG |
1064 | |
1065 | /* Poll infinite value of time */ | |
88f2b785 | 1066 | restart: |
a78af745 | 1067 | health_poll_entry(); |
5eb91c98 | 1068 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1069 | DBG("Thread kernel return from poll on %d fds", |
1070 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1071 | health_poll_exit(); |
7a485870 | 1072 | if (ret < 0) { |
88f2b785 MD |
1073 | /* |
1074 | * Restart interrupted system call. | |
1075 | */ | |
1076 | if (errno == EINTR) { | |
1077 | goto restart; | |
1078 | } | |
7a485870 DG |
1079 | goto error; |
1080 | } else if (ret == 0) { | |
1081 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
1082 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
1083 | "This should not have happened! Continuing..."); | |
7a485870 DG |
1084 | continue; |
1085 | } | |
1086 | ||
0d9c5d77 DG |
1087 | nb_fd = ret; |
1088 | ||
5eb91c98 DG |
1089 | for (i = 0; i < nb_fd; i++) { |
1090 | /* Fetch once the poll data */ | |
1091 | revents = LTTNG_POLL_GETEV(&events, i); | |
1092 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 1093 | |
840cb59c | 1094 | health_code_update(); |
44a5e5eb | 1095 | |
fd20dac9 MD |
1096 | if (!revents) { |
1097 | /* No activity for this FD (poll implementation). */ | |
1098 | continue; | |
1099 | } | |
1100 | ||
5eb91c98 | 1101 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1102 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1103 | if (ret) { |
139ac872 MD |
1104 | err = 0; |
1105 | goto exit; | |
5eb91c98 | 1106 | } |
7a485870 | 1107 | |
5eb91c98 DG |
1108 | /* Check for data on kernel pipe */ |
1109 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
6cd525e8 MD |
1110 | (void) lttng_read(kernel_poll_pipe[0], |
1111 | &tmp, 1); | |
f921c78f DG |
1112 | /* |
1113 | * Ret value is useless here, if this pipe gets any actions an | |
1114 | * update is required anyway. | |
1115 | */ | |
5eb91c98 DG |
1116 | update_poll_flag = 1; |
1117 | continue; | |
1118 | } else { | |
1119 | /* | |
1120 | * New CPU detected by the kernel. Adding kernel stream to | |
1121 | * kernel session and updating the kernel consumer | |
1122 | */ | |
1123 | if (revents & LPOLLIN) { | |
2bdd86d4 | 1124 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
1125 | if (ret < 0) { |
1126 | continue; | |
1127 | } | |
1128 | break; | |
1129 | /* | |
1130 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
1131 | * and unregister kernel stream at this point. | |
1132 | */ | |
7a485870 | 1133 | } |
7a485870 DG |
1134 | } |
1135 | } | |
1136 | } | |
1137 | ||
139ac872 | 1138 | exit: |
7a485870 | 1139 | error: |
5eb91c98 | 1140 | lttng_poll_clean(&events); |
76d7553f | 1141 | error_poll_create: |
6993eeb3 | 1142 | error_testpoint: |
6620da75 DG |
1143 | utils_close_pipe(kernel_poll_pipe); |
1144 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 1145 | if (err) { |
840cb59c | 1146 | health_error(); |
139ac872 | 1147 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
1148 | WARN("Kernel thread died unexpectedly. " |
1149 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 1150 | } |
8782cc74 | 1151 | health_unregister(health_sessiond); |
76d7553f | 1152 | DBG("Kernel thread dying"); |
7a485870 DG |
1153 | return NULL; |
1154 | } | |
1155 | ||
a23ec3a7 DG |
1156 | /* |
1157 | * Signal pthread condition of the consumer data that the thread. | |
1158 | */ | |
1159 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
1160 | { | |
1161 | pthread_mutex_lock(&data->cond_mutex); | |
1162 | ||
1163 | /* | |
1164 | * The state is set before signaling. It can be any value, it's the waiter | |
1165 | * job to correctly interpret this condition variable associated to the | |
1166 | * consumer pthread_cond. | |
1167 | * | |
1168 | * A value of 0 means that the corresponding thread of the consumer data | |
1169 | * was not started. 1 indicates that the thread has started and is ready | |
1170 | * for action. A negative value means that there was an error during the | |
1171 | * thread bootstrap. | |
1172 | */ | |
1173 | data->consumer_thread_is_ready = state; | |
1174 | (void) pthread_cond_signal(&data->cond); | |
1175 | ||
1176 | pthread_mutex_unlock(&data->cond_mutex); | |
1177 | } | |
1178 | ||
1d4b027a | 1179 | /* |
3bd1e081 | 1180 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1181 | */ |
3bd1e081 | 1182 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1183 | { |
42fc1d0b | 1184 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 1185 | uint32_t revents, nb_fd; |
1d4b027a | 1186 | enum lttcomm_return_code code; |
5eb91c98 | 1187 | struct lttng_poll_event events; |
3bd1e081 | 1188 | struct consumer_data *consumer_data = data; |
1d4b027a | 1189 | |
3bd1e081 | 1190 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1191 | |
6c71277b | 1192 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1193 | |
855060f8 | 1194 | health_code_update(); |
9449cc75 | 1195 | |
5eb91c98 | 1196 | /* |
331744e3 JD |
1197 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1198 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1199 | */ |
331744e3 | 1200 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1201 | if (ret < 0) { |
76d7553f | 1202 | goto error_poll; |
5eb91c98 | 1203 | } |
273ea72c | 1204 | |
edb8b045 DG |
1205 | /* |
1206 | * The error socket here is already in a listening state which was done | |
1207 | * just before spawning this thread to avoid a race between the consumer | |
1208 | * daemon exec trying to connect and the listen() call. | |
1209 | */ | |
3bd1e081 | 1210 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1211 | if (ret < 0) { |
1212 | goto error; | |
1213 | } | |
1214 | ||
840cb59c | 1215 | health_code_update(); |
44a5e5eb | 1216 | |
331744e3 | 1217 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1218 | restart: |
a78af745 | 1219 | health_poll_entry(); |
8ac94142 | 1220 | |
e547b070 | 1221 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
1222 | goto error; |
1223 | } | |
8ac94142 | 1224 | |
5eb91c98 | 1225 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1226 | health_poll_exit(); |
273ea72c | 1227 | if (ret < 0) { |
88f2b785 MD |
1228 | /* |
1229 | * Restart interrupted system call. | |
1230 | */ | |
1231 | if (errno == EINTR) { | |
1232 | goto restart; | |
1233 | } | |
273ea72c DG |
1234 | goto error; |
1235 | } | |
1236 | ||
0d9c5d77 DG |
1237 | nb_fd = ret; |
1238 | ||
5eb91c98 DG |
1239 | for (i = 0; i < nb_fd; i++) { |
1240 | /* Fetch once the poll data */ | |
1241 | revents = LTTNG_POLL_GETEV(&events, i); | |
1242 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1243 | ||
840cb59c | 1244 | health_code_update(); |
44a5e5eb | 1245 | |
fd20dac9 MD |
1246 | if (!revents) { |
1247 | /* No activity for this FD (poll implementation). */ | |
1248 | continue; | |
1249 | } | |
1250 | ||
5eb91c98 | 1251 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1252 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1253 | if (ret) { |
139ac872 MD |
1254 | err = 0; |
1255 | goto exit; | |
5eb91c98 DG |
1256 | } |
1257 | ||
1258 | /* Event on the registration socket */ | |
3bd1e081 | 1259 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 1260 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 1261 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
1262 | goto error; |
1263 | } | |
1264 | } | |
273ea72c DG |
1265 | } |
1266 | ||
3bd1e081 | 1267 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1268 | if (sock < 0) { |
1269 | goto error; | |
1270 | } | |
1271 | ||
b662582b DG |
1272 | /* |
1273 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1274 | * show must go on. | |
1275 | */ | |
1276 | (void) utils_set_fd_cloexec(sock); | |
1277 | ||
840cb59c | 1278 | health_code_update(); |
44a5e5eb | 1279 | |
3bd1e081 | 1280 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1281 | |
712ea556 | 1282 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1283 | ret = lttcomm_recv_unix_sock(sock, &code, |
1284 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1285 | if (ret <= 0) { |
1286 | goto error; | |
1287 | } | |
1288 | ||
840cb59c | 1289 | health_code_update(); |
f73fabfd | 1290 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
331744e3 | 1291 | /* Connect both socket, command and metadata. */ |
3bd1e081 MD |
1292 | consumer_data->cmd_sock = |
1293 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
4ce514c4 | 1294 | consumer_data->metadata_fd = |
331744e3 | 1295 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); |
92db7cdc DG |
1296 | if (consumer_data->cmd_sock < 0 |
1297 | || consumer_data->metadata_fd < 0) { | |
331744e3 | 1298 | PERROR("consumer connect cmd socket"); |
a23ec3a7 DG |
1299 | /* On error, signal condition and quit. */ |
1300 | signal_consumer_condition(consumer_data, -1); | |
1d4b027a DG |
1301 | goto error; |
1302 | } | |
9363801e | 1303 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; |
331744e3 JD |
1304 | /* Create metadata socket lock. */ |
1305 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1306 | if (consumer_data->metadata_sock.lock == NULL) { | |
1307 | PERROR("zmalloc pthread mutex"); | |
1308 | ret = -1; | |
1309 | goto error; | |
1310 | } | |
1311 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1312 | ||
a23ec3a7 | 1313 | signal_consumer_condition(consumer_data, 1); |
331744e3 JD |
1314 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); |
1315 | DBG("Consumer metadata socket ready (fd: %d)", | |
4ce514c4 | 1316 | consumer_data->metadata_fd); |
1d4b027a | 1317 | } else { |
3bd1e081 | 1318 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1319 | lttcomm_get_readable_code(-code)); |
1320 | goto error; | |
1321 | } | |
1322 | ||
331744e3 | 1323 | /* Remove the consumerd error sock since we've established a connexion */ |
3bd1e081 | 1324 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1325 | if (ret < 0) { |
72079cae DG |
1326 | goto error; |
1327 | } | |
1328 | ||
331744e3 | 1329 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1330 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1331 | if (ret < 0) { | |
72079cae | 1332 | goto error; |
5eb91c98 DG |
1333 | } |
1334 | ||
331744e3 | 1335 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1336 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1337 | LPOLLIN | LPOLLRDHUP); |
1338 | if (ret < 0) { | |
1339 | goto error; | |
1340 | } | |
1341 | ||
840cb59c | 1342 | health_code_update(); |
44a5e5eb | 1343 | |
331744e3 | 1344 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1345 | restart_poll: |
331744e3 | 1346 | while (1) { |
42fc1d0b DG |
1347 | health_code_update(); |
1348 | ||
1349 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
1350 | if (should_quit) { | |
1351 | /* Not a health error. */ | |
1352 | err = 0; | |
1353 | goto exit; | |
1354 | } | |
1355 | ||
331744e3 JD |
1356 | health_poll_entry(); |
1357 | ret = lttng_poll_wait(&events, -1); | |
1358 | health_poll_exit(); | |
1359 | if (ret < 0) { | |
1360 | /* | |
1361 | * Restart interrupted system call. | |
1362 | */ | |
1363 | if (errno == EINTR) { | |
1364 | goto restart_poll; | |
1365 | } | |
1366 | goto error; | |
88f2b785 | 1367 | } |
72079cae | 1368 | |
331744e3 | 1369 | nb_fd = ret; |
0d9c5d77 | 1370 | |
331744e3 JD |
1371 | for (i = 0; i < nb_fd; i++) { |
1372 | /* Fetch once the poll data */ | |
1373 | revents = LTTNG_POLL_GETEV(&events, i); | |
1374 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1375 | |
331744e3 | 1376 | health_code_update(); |
44a5e5eb | 1377 | |
fd20dac9 MD |
1378 | if (!revents) { |
1379 | /* No activity for this FD (poll implementation). */ | |
1380 | continue; | |
1381 | } | |
1382 | ||
42fc1d0b DG |
1383 | /* |
1384 | * Thread quit pipe has been triggered, flag that we should stop | |
1385 | * but continue the current loop to handle potential data from | |
1386 | * consumer. | |
1387 | */ | |
1388 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 1389 | |
331744e3 JD |
1390 | if (pollfd == sock) { |
1391 | /* Event on the consumerd socket */ | |
1392 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1393 | ERR("consumer err socket second poll error"); | |
1394 | goto error; | |
1395 | } | |
1396 | health_code_update(); | |
1397 | /* Wait for any kconsumerd error */ | |
1398 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1399 | sizeof(enum lttcomm_return_code)); | |
1400 | if (ret <= 0) { | |
1401 | ERR("consumer closed the command socket"); | |
1402 | goto error; | |
1403 | } | |
1404 | ||
1405 | ERR("consumer return code : %s", | |
1406 | lttcomm_get_readable_code(-code)); | |
1407 | ||
1408 | goto exit; | |
4ce514c4 | 1409 | } else if (pollfd == consumer_data->metadata_fd) { |
331744e3 JD |
1410 | /* UST metadata requests */ |
1411 | ret = ust_consumer_metadata_request( | |
1412 | &consumer_data->metadata_sock); | |
1413 | if (ret < 0) { | |
1414 | ERR("Handling metadata request"); | |
1415 | goto error; | |
1416 | } | |
5eb91c98 | 1417 | } |
42fc1d0b | 1418 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 1419 | } |
331744e3 | 1420 | health_code_update(); |
5eb91c98 DG |
1421 | } |
1422 | ||
139ac872 | 1423 | exit: |
1d4b027a | 1424 | error: |
fdadac08 DG |
1425 | /* |
1426 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1427 | * thread might be using them so get exclusive access which will abort all |
1428 | * other consumer command by other threads. | |
fdadac08 DG |
1429 | */ |
1430 | pthread_mutex_lock(&consumer_data->lock); | |
1431 | ||
5c827ce0 DG |
1432 | /* Immediately set the consumerd state to stopped */ |
1433 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1434 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1435 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1436 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1437 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1438 | } else { | |
1439 | /* Code flow error... */ | |
1440 | assert(0); | |
1441 | } | |
1442 | ||
76d7553f MD |
1443 | if (consumer_data->err_sock >= 0) { |
1444 | ret = close(consumer_data->err_sock); | |
1445 | if (ret) { | |
1446 | PERROR("close"); | |
1447 | } | |
a76cbd9f | 1448 | consumer_data->err_sock = -1; |
76d7553f MD |
1449 | } |
1450 | if (consumer_data->cmd_sock >= 0) { | |
1451 | ret = close(consumer_data->cmd_sock); | |
1452 | if (ret) { | |
1453 | PERROR("close"); | |
1454 | } | |
a76cbd9f | 1455 | consumer_data->cmd_sock = -1; |
76d7553f | 1456 | } |
96544455 SS |
1457 | if (consumer_data->metadata_sock.fd_ptr && |
1458 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1459 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1460 | if (ret) { |
1461 | PERROR("close"); | |
1462 | } | |
1463 | } | |
76d7553f MD |
1464 | if (sock >= 0) { |
1465 | ret = close(sock); | |
1466 | if (ret) { | |
1467 | PERROR("close"); | |
1468 | } | |
1469 | } | |
273ea72c | 1470 | |
3bd1e081 MD |
1471 | unlink(consumer_data->err_unix_sock_path); |
1472 | unlink(consumer_data->cmd_unix_sock_path); | |
1473 | consumer_data->pid = 0; | |
fdadac08 | 1474 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1475 | |
fdadac08 | 1476 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1477 | if (consumer_data->metadata_sock.lock) { |
1478 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1479 | free(consumer_data->metadata_sock.lock); | |
1480 | } | |
5eb91c98 | 1481 | lttng_poll_clean(&events); |
76d7553f | 1482 | error_poll: |
139ac872 | 1483 | if (err) { |
840cb59c | 1484 | health_error(); |
139ac872 MD |
1485 | ERR("Health error occurred in %s", __func__); |
1486 | } | |
8782cc74 | 1487 | health_unregister(health_sessiond); |
76d7553f | 1488 | DBG("consumer thread cleanup completed"); |
0177d773 | 1489 | |
5eb91c98 | 1490 | return NULL; |
099e26bd DG |
1491 | } |
1492 | ||
099e26bd DG |
1493 | /* |
1494 | * This thread manage application communication. | |
1d4b027a DG |
1495 | */ |
1496 | static void *thread_manage_apps(void *data) | |
099e26bd | 1497 | { |
139ac872 | 1498 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1499 | ssize_t size_ret; |
5eb91c98 | 1500 | uint32_t revents, nb_fd; |
5eb91c98 | 1501 | struct lttng_poll_event events; |
099e26bd DG |
1502 | |
1503 | DBG("[thread] Manage application started"); | |
1504 | ||
f6a9efaa DG |
1505 | rcu_register_thread(); |
1506 | rcu_thread_online(); | |
1507 | ||
6c71277b | 1508 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1509 | |
e547b070 | 1510 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1511 | goto error_testpoint; |
1512 | } | |
1513 | ||
840cb59c | 1514 | health_code_update(); |
44a5e5eb | 1515 | |
d0b96690 | 1516 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1517 | if (ret < 0) { |
76d7553f | 1518 | goto error_poll_create; |
5eb91c98 | 1519 | } |
099e26bd | 1520 | |
5eb91c98 DG |
1521 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1522 | if (ret < 0) { | |
1523 | goto error; | |
1524 | } | |
099e26bd | 1525 | |
e547b070 | 1526 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1527 | goto error; |
1528 | } | |
8ac94142 | 1529 | |
840cb59c | 1530 | health_code_update(); |
44a5e5eb | 1531 | |
5eb91c98 | 1532 | while (1) { |
7fa2082e | 1533 | DBG("Apps thread polling"); |
099e26bd DG |
1534 | |
1535 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1536 | restart: |
a78af745 | 1537 | health_poll_entry(); |
5eb91c98 | 1538 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1539 | DBG("Apps thread return from poll on %d fds", |
1540 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1541 | health_poll_exit(); |
099e26bd | 1542 | if (ret < 0) { |
88f2b785 MD |
1543 | /* |
1544 | * Restart interrupted system call. | |
1545 | */ | |
1546 | if (errno == EINTR) { | |
1547 | goto restart; | |
1548 | } | |
099e26bd DG |
1549 | goto error; |
1550 | } | |
1551 | ||
0d9c5d77 DG |
1552 | nb_fd = ret; |
1553 | ||
5eb91c98 DG |
1554 | for (i = 0; i < nb_fd; i++) { |
1555 | /* Fetch once the poll data */ | |
1556 | revents = LTTNG_POLL_GETEV(&events, i); | |
1557 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1558 | ||
840cb59c | 1559 | health_code_update(); |
44a5e5eb | 1560 | |
fd20dac9 MD |
1561 | if (!revents) { |
1562 | /* No activity for this FD (poll implementation). */ | |
1563 | continue; | |
1564 | } | |
1565 | ||
5eb91c98 | 1566 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1567 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1568 | if (ret) { |
139ac872 MD |
1569 | err = 0; |
1570 | goto exit; | |
5eb91c98 | 1571 | } |
099e26bd | 1572 | |
5eb91c98 DG |
1573 | /* Inspect the apps cmd pipe */ |
1574 | if (pollfd == apps_cmd_pipe[0]) { | |
1575 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1576 | ERR("Apps command pipe error"); | |
0177d773 | 1577 | goto error; |
5eb91c98 | 1578 | } else if (revents & LPOLLIN) { |
d0b96690 DG |
1579 | int sock; |
1580 | ||
5eb91c98 | 1581 | /* Empty pipe */ |
6cd525e8 MD |
1582 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1583 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1584 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1585 | goto error; |
1586 | } | |
099e26bd | 1587 | |
840cb59c | 1588 | health_code_update(); |
44a5e5eb | 1589 | |
ffe60014 | 1590 | /* |
d0b96690 DG |
1591 | * We only monitor the error events of the socket. This |
1592 | * thread does not handle any incoming data from UST | |
1593 | * (POLLIN). | |
ffe60014 | 1594 | */ |
d0b96690 DG |
1595 | ret = lttng_poll_add(&events, sock, |
1596 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1597 | if (ret < 0) { | |
5eb91c98 | 1598 | goto error; |
e0c7ec2b | 1599 | } |
acc7b41b | 1600 | |
d0b96690 | 1601 | DBG("Apps with sock %d added to poll set", sock); |
0177d773 | 1602 | } |
5eb91c98 DG |
1603 | } else { |
1604 | /* | |
54d01ffb DG |
1605 | * At this point, we know that a registered application made |
1606 | * the event at poll_wait. | |
5eb91c98 DG |
1607 | */ |
1608 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1609 | /* Removing from the poll set */ | |
1610 | ret = lttng_poll_del(&events, pollfd); | |
1611 | if (ret < 0) { | |
1612 | goto error; | |
1613 | } | |
099e26bd | 1614 | |
b9d9b220 | 1615 | /* Socket closed on remote end. */ |
56fff090 | 1616 | ust_app_unregister(pollfd); |
5eb91c98 | 1617 | } |
099e26bd | 1618 | } |
44a5e5eb | 1619 | |
840cb59c | 1620 | health_code_update(); |
099e26bd | 1621 | } |
099e26bd DG |
1622 | } |
1623 | ||
139ac872 | 1624 | exit: |
099e26bd | 1625 | error: |
5eb91c98 | 1626 | lttng_poll_clean(&events); |
76d7553f | 1627 | error_poll_create: |
6993eeb3 | 1628 | error_testpoint: |
6620da75 DG |
1629 | utils_close_pipe(apps_cmd_pipe); |
1630 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1631 | ||
1632 | /* | |
1633 | * We don't clean the UST app hash table here since already registered | |
1634 | * applications can still be controlled so let them be until the session | |
1635 | * daemon dies or the applications stop. | |
1636 | */ | |
1637 | ||
139ac872 | 1638 | if (err) { |
840cb59c | 1639 | health_error(); |
139ac872 MD |
1640 | ERR("Health error occurred in %s", __func__); |
1641 | } | |
8782cc74 | 1642 | health_unregister(health_sessiond); |
76d7553f | 1643 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1644 | rcu_thread_offline(); |
1645 | rcu_unregister_thread(); | |
099e26bd DG |
1646 | return NULL; |
1647 | } | |
1648 | ||
d0b96690 | 1649 | /* |
d88aee68 DG |
1650 | * Send a socket to a thread This is called from the dispatch UST registration |
1651 | * thread once all sockets are set for the application. | |
d0b96690 | 1652 | * |
b85dc84c DG |
1653 | * The sock value can be invalid, we don't really care, the thread will handle |
1654 | * it and make the necessary cleanup if so. | |
1655 | * | |
d0b96690 DG |
1656 | * On success, return 0 else a negative value being the errno message of the |
1657 | * write(). | |
1658 | */ | |
d88aee68 | 1659 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1660 | { |
6cd525e8 | 1661 | ssize_t ret; |
d0b96690 | 1662 | |
b85dc84c DG |
1663 | /* |
1664 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1665 | * before calling this function being a shutdown state of the thread. | |
1666 | */ | |
1667 | if (fd < 0) { | |
1668 | ret = -EBADF; | |
1669 | goto error; | |
1670 | } | |
d0b96690 | 1671 | |
6cd525e8 MD |
1672 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1673 | if (ret < sizeof(sock)) { | |
d88aee68 | 1674 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1675 | if (ret < 0) { |
1676 | ret = -errno; | |
1677 | } | |
1678 | goto error; | |
1679 | } | |
1680 | ||
1681 | /* All good. Don't send back the write positive ret value. */ | |
1682 | ret = 0; | |
1683 | error: | |
6cd525e8 | 1684 | return (int) ret; |
d0b96690 DG |
1685 | } |
1686 | ||
f45e313d DG |
1687 | /* |
1688 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1689 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1690 | * notify socket is never received. | |
1691 | */ | |
1692 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1693 | { | |
1694 | int ret, nb_fd = 0, i; | |
1695 | unsigned int fd_added = 0; | |
1696 | struct lttng_poll_event events; | |
1697 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1698 | ||
1699 | assert(wait_queue); | |
1700 | ||
1701 | lttng_poll_init(&events); | |
1702 | ||
1703 | /* Just skip everything for an empty queue. */ | |
1704 | if (!wait_queue->count) { | |
1705 | goto end; | |
1706 | } | |
1707 | ||
1708 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1709 | if (ret < 0) { | |
1710 | goto error_create; | |
1711 | } | |
1712 | ||
1713 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1714 | &wait_queue->head, head) { | |
1715 | assert(wait_node->app); | |
1716 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1717 | LPOLLHUP | LPOLLERR); | |
1718 | if (ret < 0) { | |
1719 | goto error; | |
1720 | } | |
1721 | ||
1722 | fd_added = 1; | |
1723 | } | |
1724 | ||
1725 | if (!fd_added) { | |
1726 | goto end; | |
1727 | } | |
1728 | ||
1729 | /* | |
1730 | * Poll but don't block so we can quickly identify the faulty events and | |
1731 | * clean them afterwards from the wait queue. | |
1732 | */ | |
1733 | ret = lttng_poll_wait(&events, 0); | |
1734 | if (ret < 0) { | |
1735 | goto error; | |
1736 | } | |
1737 | nb_fd = ret; | |
1738 | ||
1739 | for (i = 0; i < nb_fd; i++) { | |
1740 | /* Get faulty FD. */ | |
1741 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1742 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1743 | ||
fd20dac9 MD |
1744 | if (!revents) { |
1745 | /* No activity for this FD (poll implementation). */ | |
1746 | continue; | |
1747 | } | |
1748 | ||
f45e313d DG |
1749 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1750 | &wait_queue->head, head) { | |
1751 | if (pollfd == wait_node->app->sock && | |
1752 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1753 | cds_list_del(&wait_node->head); | |
1754 | wait_queue->count--; | |
1755 | ust_app_destroy(wait_node->app); | |
1756 | free(wait_node); | |
1757 | break; | |
1758 | } | |
1759 | } | |
1760 | } | |
1761 | ||
1762 | if (nb_fd > 0) { | |
1763 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1764 | } | |
1765 | ||
1766 | end: | |
1767 | lttng_poll_clean(&events); | |
1768 | return; | |
1769 | ||
1770 | error: | |
1771 | lttng_poll_clean(&events); | |
1772 | error_create: | |
1773 | ERR("Unable to sanitize wait queue"); | |
1774 | return; | |
1775 | } | |
1776 | ||
099e26bd DG |
1777 | /* |
1778 | * Dispatch request from the registration threads to the application | |
1779 | * communication thread. | |
1780 | */ | |
1781 | static void *thread_dispatch_ust_registration(void *data) | |
1782 | { | |
12e2b881 | 1783 | int ret, err = -1; |
8bdee6e2 | 1784 | struct cds_wfcq_node *node; |
099e26bd | 1785 | struct ust_command *ust_cmd = NULL; |
f45e313d DG |
1786 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1787 | struct ust_reg_wait_queue wait_queue = { | |
1788 | .count = 0, | |
1789 | }; | |
d0b96690 | 1790 | |
6c71277b | 1791 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1792 | |
9ad42ec1 MD |
1793 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1794 | goto error_testpoint; | |
1795 | } | |
1796 | ||
12e2b881 MD |
1797 | health_code_update(); |
1798 | ||
f45e313d | 1799 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1800 | |
1801 | DBG("[thread] Dispatch UST command started"); | |
1802 | ||
26c9d55e | 1803 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
12e2b881 MD |
1804 | health_code_update(); |
1805 | ||
099e26bd DG |
1806 | /* Atomically prepare the queue futex */ |
1807 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1808 | ||
1809 | do { | |
d0b96690 | 1810 | struct ust_app *app = NULL; |
7972aab2 | 1811 | ust_cmd = NULL; |
d0b96690 | 1812 | |
f45e313d DG |
1813 | /* |
1814 | * Make sure we don't have node(s) that have hung up before receiving | |
1815 | * the notify socket. This is to clean the list in order to avoid | |
1816 | * memory leaks from notify socket that are never seen. | |
1817 | */ | |
1818 | sanitize_wait_queue(&wait_queue); | |
1819 | ||
12e2b881 | 1820 | health_code_update(); |
099e26bd | 1821 | /* Dequeue command for registration */ |
8bdee6e2 | 1822 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1823 | if (node == NULL) { |
00a17c97 | 1824 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1825 | /* Continue thread execution */ |
1826 | break; | |
1827 | } | |
1828 | ||
1829 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1830 | ||
2f50c8a3 DG |
1831 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1832 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1833 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1834 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1835 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1836 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1837 | |
1838 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1839 | wait_node = zmalloc(sizeof(*wait_node)); | |
1840 | if (!wait_node) { | |
1841 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1842 | ret = close(ust_cmd->sock); |
1843 | if (ret < 0) { | |
1844 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1845 | } | |
51dec90d | 1846 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1847 | free(ust_cmd); |
d0b96690 DG |
1848 | goto error; |
1849 | } | |
1850 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1851 | ||
1852 | /* Create application object if socket is CMD. */ | |
1853 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1854 | ust_cmd->sock); | |
1855 | if (!wait_node->app) { | |
1856 | ret = close(ust_cmd->sock); | |
1857 | if (ret < 0) { | |
1858 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1859 | } |
51dec90d | 1860 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1861 | free(wait_node); |
7972aab2 | 1862 | free(ust_cmd); |
d0b96690 DG |
1863 | continue; |
1864 | } | |
1865 | /* | |
1866 | * Add application to the wait queue so we can set the notify | |
1867 | * socket before putting this object in the global ht. | |
1868 | */ | |
f45e313d DG |
1869 | cds_list_add(&wait_node->head, &wait_queue.head); |
1870 | wait_queue.count++; | |
d0b96690 | 1871 | |
7972aab2 | 1872 | free(ust_cmd); |
d0b96690 DG |
1873 | /* |
1874 | * We have to continue here since we don't have the notify | |
1875 | * socket and the application MUST be added to the hash table | |
1876 | * only at that moment. | |
1877 | */ | |
1878 | continue; | |
1879 | } else { | |
1880 | /* | |
1881 | * Look for the application in the local wait queue and set the | |
1882 | * notify socket if found. | |
1883 | */ | |
d88aee68 | 1884 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1885 | &wait_queue.head, head) { |
12e2b881 | 1886 | health_code_update(); |
d0b96690 DG |
1887 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1888 | wait_node->app->notify_sock = ust_cmd->sock; | |
1889 | cds_list_del(&wait_node->head); | |
f45e313d | 1890 | wait_queue.count--; |
d0b96690 DG |
1891 | app = wait_node->app; |
1892 | free(wait_node); | |
1893 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1894 | break; | |
1895 | } | |
1896 | } | |
020d7f60 DG |
1897 | |
1898 | /* | |
1899 | * With no application at this stage the received socket is | |
1900 | * basically useless so close it before we free the cmd data | |
1901 | * structure for good. | |
1902 | */ | |
1903 | if (!app) { | |
1904 | ret = close(ust_cmd->sock); | |
1905 | if (ret < 0) { | |
1906 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1907 | } | |
51dec90d | 1908 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1909 | } |
7972aab2 | 1910 | free(ust_cmd); |
d0b96690 DG |
1911 | } |
1912 | ||
1913 | if (app) { | |
d0b96690 DG |
1914 | /* |
1915 | * @session_lock_list | |
1916 | * | |
1917 | * Lock the global session list so from the register up to the | |
1918 | * registration done message, no thread can see the application | |
1919 | * and change its state. | |
1920 | */ | |
1921 | session_lock_list(); | |
1922 | rcu_read_lock(); | |
d88aee68 | 1923 | |
d0b96690 DG |
1924 | /* |
1925 | * Add application to the global hash table. This needs to be | |
1926 | * done before the update to the UST registry can locate the | |
1927 | * application. | |
1928 | */ | |
1929 | ust_app_add(app); | |
d88aee68 DG |
1930 | |
1931 | /* Set app version. This call will print an error if needed. */ | |
1932 | (void) ust_app_version(app); | |
1933 | ||
1934 | /* Send notify socket through the notify pipe. */ | |
1935 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1936 | app->notify_sock); | |
1937 | if (ret < 0) { | |
1938 | rcu_read_unlock(); | |
1939 | session_unlock_list(); | |
b85dc84c DG |
1940 | /* |
1941 | * No notify thread, stop the UST tracing. However, this is | |
1942 | * not an internal error of the this thread thus setting | |
1943 | * the health error code to a normal exit. | |
1944 | */ | |
1945 | err = 0; | |
d88aee68 | 1946 | goto error; |
6620da75 | 1947 | } |
d88aee68 | 1948 | |
d0b96690 DG |
1949 | /* |
1950 | * Update newly registered application with the tracing | |
1951 | * registry info already enabled information. | |
1952 | */ | |
1953 | update_ust_app(app->sock); | |
d88aee68 DG |
1954 | |
1955 | /* | |
1956 | * Don't care about return value. Let the manage apps threads | |
1957 | * handle app unregistration upon socket close. | |
1958 | */ | |
1959 | (void) ust_app_register_done(app->sock); | |
1960 | ||
1961 | /* | |
1962 | * Even if the application socket has been closed, send the app | |
1963 | * to the thread and unregistration will take place at that | |
1964 | * place. | |
1965 | */ | |
1966 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 1967 | if (ret < 0) { |
d88aee68 DG |
1968 | rcu_read_unlock(); |
1969 | session_unlock_list(); | |
b85dc84c DG |
1970 | /* |
1971 | * No apps. thread, stop the UST tracing. However, this is | |
1972 | * not an internal error of the this thread thus setting | |
1973 | * the health error code to a normal exit. | |
1974 | */ | |
1975 | err = 0; | |
d88aee68 | 1976 | goto error; |
d0b96690 | 1977 | } |
d88aee68 | 1978 | |
d0b96690 DG |
1979 | rcu_read_unlock(); |
1980 | session_unlock_list(); | |
099e26bd | 1981 | } |
099e26bd DG |
1982 | } while (node != NULL); |
1983 | ||
12e2b881 | 1984 | health_poll_entry(); |
099e26bd DG |
1985 | /* Futex wait on queue. Blocking call on futex() */ |
1986 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 1987 | health_poll_exit(); |
099e26bd | 1988 | } |
12e2b881 MD |
1989 | /* Normal exit, no error */ |
1990 | err = 0; | |
099e26bd DG |
1991 | |
1992 | error: | |
d88aee68 DG |
1993 | /* Clean up wait queue. */ |
1994 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 1995 | &wait_queue.head, head) { |
d88aee68 | 1996 | cds_list_del(&wait_node->head); |
f45e313d | 1997 | wait_queue.count--; |
d88aee68 DG |
1998 | free(wait_node); |
1999 | } | |
2000 | ||
9ad42ec1 | 2001 | error_testpoint: |
099e26bd | 2002 | DBG("Dispatch thread dying"); |
12e2b881 MD |
2003 | if (err) { |
2004 | health_error(); | |
2005 | ERR("Health error occurred in %s", __func__); | |
2006 | } | |
8782cc74 | 2007 | health_unregister(health_sessiond); |
099e26bd DG |
2008 | return NULL; |
2009 | } | |
2010 | ||
2011 | /* | |
2012 | * This thread manage application registration. | |
2013 | */ | |
2014 | static void *thread_registration_apps(void *data) | |
1d4b027a | 2015 | { |
139ac872 | 2016 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
2017 | uint32_t revents, nb_fd; |
2018 | struct lttng_poll_event events; | |
099e26bd DG |
2019 | /* |
2020 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
2021 | * freed in the manage apps thread. | |
2022 | */ | |
2023 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 2024 | |
099e26bd | 2025 | DBG("[thread] Manage application registration started"); |
1d4b027a | 2026 | |
6c71277b | 2027 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 2028 | |
e547b070 | 2029 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
2030 | goto error_testpoint; |
2031 | } | |
8ac94142 | 2032 | |
1d4b027a DG |
2033 | ret = lttcomm_listen_unix_sock(apps_sock); |
2034 | if (ret < 0) { | |
76d7553f | 2035 | goto error_listen; |
1d4b027a DG |
2036 | } |
2037 | ||
5eb91c98 DG |
2038 | /* |
2039 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
2040 | * more will be added to this poll set. | |
2041 | */ | |
d0b96690 | 2042 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 2043 | if (ret < 0) { |
76d7553f | 2044 | goto error_create_poll; |
5eb91c98 | 2045 | } |
273ea72c | 2046 | |
5eb91c98 DG |
2047 | /* Add the application registration socket */ |
2048 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
2049 | if (ret < 0) { | |
76d7553f | 2050 | goto error_poll_add; |
5eb91c98 | 2051 | } |
273ea72c | 2052 | |
1d4b027a | 2053 | /* Notify all applications to register */ |
0fdd1e2c DG |
2054 | ret = notify_ust_apps(1); |
2055 | if (ret < 0) { | |
2056 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
2057 | "Execution continues but there might be problem for already\n" |
2058 | "running applications that wishes to register."); | |
0fdd1e2c | 2059 | } |
1d4b027a DG |
2060 | |
2061 | while (1) { | |
2062 | DBG("Accepting application registration"); | |
273ea72c DG |
2063 | |
2064 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 2065 | restart: |
a78af745 | 2066 | health_poll_entry(); |
5eb91c98 | 2067 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 2068 | health_poll_exit(); |
273ea72c | 2069 | if (ret < 0) { |
88f2b785 MD |
2070 | /* |
2071 | * Restart interrupted system call. | |
2072 | */ | |
2073 | if (errno == EINTR) { | |
2074 | goto restart; | |
2075 | } | |
273ea72c DG |
2076 | goto error; |
2077 | } | |
2078 | ||
0d9c5d77 DG |
2079 | nb_fd = ret; |
2080 | ||
5eb91c98 | 2081 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 2082 | health_code_update(); |
139ac872 | 2083 | |
5eb91c98 DG |
2084 | /* Fetch once the poll data */ |
2085 | revents = LTTNG_POLL_GETEV(&events, i); | |
2086 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 2087 | |
fd20dac9 MD |
2088 | if (!revents) { |
2089 | /* No activity for this FD (poll implementation). */ | |
2090 | continue; | |
2091 | } | |
2092 | ||
5eb91c98 | 2093 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 2094 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 2095 | if (ret) { |
139ac872 MD |
2096 | err = 0; |
2097 | goto exit; | |
90014c57 | 2098 | } |
1d4b027a | 2099 | |
5eb91c98 DG |
2100 | /* Event on the registration socket */ |
2101 | if (pollfd == apps_sock) { | |
2102 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2103 | ERR("Register apps socket poll error"); | |
2104 | goto error; | |
2105 | } else if (revents & LPOLLIN) { | |
2106 | sock = lttcomm_accept_unix_sock(apps_sock); | |
2107 | if (sock < 0) { | |
2108 | goto error; | |
2109 | } | |
099e26bd | 2110 | |
16c5c8fa DG |
2111 | /* |
2112 | * Set socket timeout for both receiving and ending. | |
2113 | * app_socket_timeout is in seconds, whereas | |
2114 | * lttcomm_setsockopt_rcv_timeout and | |
2115 | * lttcomm_setsockopt_snd_timeout expect msec as | |
2116 | * parameter. | |
2117 | */ | |
2118 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
2119 | app_socket_timeout * 1000); | |
2120 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
2121 | app_socket_timeout * 1000); | |
2122 | ||
b662582b DG |
2123 | /* |
2124 | * Set the CLOEXEC flag. Return code is useless because | |
2125 | * either way, the show must go on. | |
2126 | */ | |
2127 | (void) utils_set_fd_cloexec(sock); | |
2128 | ||
5eb91c98 | 2129 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 2130 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 2131 | if (ust_cmd == NULL) { |
76d7553f | 2132 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
2133 | goto error; |
2134 | } | |
1d4b027a | 2135 | |
5eb91c98 DG |
2136 | /* |
2137 | * Using message-based transmissions to ensure we don't | |
2138 | * have to deal with partially received messages. | |
2139 | */ | |
4063050c MD |
2140 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
2141 | if (ret < 0) { | |
2142 | ERR("Exhausted file descriptors allowed for applications."); | |
2143 | free(ust_cmd); | |
2144 | ret = close(sock); | |
2145 | if (ret) { | |
2146 | PERROR("close"); | |
2147 | } | |
2148 | sock = -1; | |
2149 | continue; | |
2150 | } | |
d88aee68 | 2151 | |
840cb59c | 2152 | health_code_update(); |
d0b96690 DG |
2153 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
2154 | if (ret < 0) { | |
5eb91c98 | 2155 | free(ust_cmd); |
d0b96690 | 2156 | /* Close socket of the application. */ |
76d7553f MD |
2157 | ret = close(sock); |
2158 | if (ret) { | |
2159 | PERROR("close"); | |
2160 | } | |
4063050c | 2161 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 2162 | sock = -1; |
5eb91c98 DG |
2163 | continue; |
2164 | } | |
840cb59c | 2165 | health_code_update(); |
099e26bd | 2166 | |
5eb91c98 | 2167 | ust_cmd->sock = sock; |
34a2494f | 2168 | sock = -1; |
099e26bd | 2169 | |
5eb91c98 DG |
2170 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2171 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2172 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2173 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2174 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2175 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2176 | |
5eb91c98 DG |
2177 | /* |
2178 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2179 | * has been taken! This apps will be part of the *system*. |
5eb91c98 | 2180 | */ |
8bdee6e2 | 2181 | cds_wfcq_enqueue(&ust_cmd_queue.head, &ust_cmd_queue.tail, &ust_cmd->node); |
5eb91c98 DG |
2182 | |
2183 | /* | |
2184 | * Wake the registration queue futex. Implicit memory | |
8bdee6e2 | 2185 | * barrier with the exchange in cds_wfcq_enqueue. |
5eb91c98 DG |
2186 | */ |
2187 | futex_nto1_wake(&ust_cmd_queue.futex); | |
2188 | } | |
2189 | } | |
90014c57 | 2190 | } |
1d4b027a DG |
2191 | } |
2192 | ||
139ac872 | 2193 | exit: |
1d4b027a | 2194 | error: |
0fdd1e2c DG |
2195 | /* Notify that the registration thread is gone */ |
2196 | notify_ust_apps(0); | |
2197 | ||
a4b35e07 | 2198 | if (apps_sock >= 0) { |
76d7553f MD |
2199 | ret = close(apps_sock); |
2200 | if (ret) { | |
2201 | PERROR("close"); | |
2202 | } | |
a4b35e07 | 2203 | } |
46c3f085 | 2204 | if (sock >= 0) { |
76d7553f MD |
2205 | ret = close(sock); |
2206 | if (ret) { | |
2207 | PERROR("close"); | |
2208 | } | |
4063050c | 2209 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2210 | } |
273ea72c | 2211 | unlink(apps_unix_sock_path); |
0fdd1e2c | 2212 | |
76d7553f | 2213 | error_poll_add: |
5eb91c98 | 2214 | lttng_poll_clean(&events); |
76d7553f MD |
2215 | error_listen: |
2216 | error_create_poll: | |
6993eeb3 | 2217 | error_testpoint: |
76d7553f | 2218 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2219 | if (err) { |
2220 | health_error(); | |
2221 | ERR("Health error occurred in %s", __func__); | |
2222 | } | |
8782cc74 | 2223 | health_unregister(health_sessiond); |
5eb91c98 | 2224 | |
1d4b027a DG |
2225 | return NULL; |
2226 | } | |
2227 | ||
8c0faa1d | 2228 | /* |
3bd1e081 | 2229 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2230 | * exec or it will fails. |
8c0faa1d | 2231 | */ |
3bd1e081 | 2232 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2233 | { |
a23ec3a7 | 2234 | int ret, clock_ret; |
ee0b0061 DG |
2235 | struct timespec timeout; |
2236 | ||
a23ec3a7 DG |
2237 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
2238 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 2239 | |
a23ec3a7 DG |
2240 | /* Setup pthread condition */ |
2241 | ret = pthread_condattr_init(&consumer_data->condattr); | |
4a15001e | 2242 | if (ret) { |
a23ec3a7 DG |
2243 | errno = ret; |
2244 | PERROR("pthread_condattr_init consumer data"); | |
2245 | goto error; | |
2246 | } | |
2247 | ||
2248 | /* | |
2249 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2250 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2251 | * for a more details and how we noticed it. | |
2252 | */ | |
2253 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
4a15001e | 2254 | if (ret) { |
a23ec3a7 DG |
2255 | errno = ret; |
2256 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2257 | goto error; |
2258 | } | |
8c0faa1d | 2259 | |
a23ec3a7 | 2260 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
4a15001e | 2261 | if (ret) { |
a23ec3a7 DG |
2262 | errno = ret; |
2263 | PERROR("pthread_cond_init consumer data"); | |
2264 | goto error; | |
2265 | } | |
2266 | ||
2267 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
2268 | consumer_data); | |
4a15001e MD |
2269 | if (ret) { |
2270 | errno = ret; | |
3bd1e081 | 2271 | PERROR("pthread_create consumer"); |
ee0b0061 | 2272 | ret = -1; |
8c0faa1d DG |
2273 | goto error; |
2274 | } | |
2275 | ||
a23ec3a7 DG |
2276 | /* We are about to wait on a pthread condition */ |
2277 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2278 | ||
ee0b0061 | 2279 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
2280 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
2281 | /* | |
2282 | * Set the timeout for the condition timed wait even if the clock gettime | |
2283 | * call fails since we might loop on that call and we want to avoid to | |
2284 | * increment the timeout too many times. | |
2285 | */ | |
2286 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2287 | ||
2288 | /* | |
2289 | * The following loop COULD be skipped in some conditions so this is why we | |
2290 | * set ret to 0 in order to make sure at least one round of the loop is | |
2291 | * done. | |
2292 | */ | |
2293 | ret = 0; | |
2294 | ||
2295 | /* | |
2296 | * Loop until the condition is reached or when a timeout is reached. Note | |
2297 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2298 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2299 | * possible. This loop does not take any chances and works with both of | |
2300 | * them. | |
2301 | */ | |
2302 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2303 | if (clock_ret < 0) { | |
2304 | PERROR("clock_gettime spawn consumer"); | |
2305 | /* Infinite wait for the consumerd thread to be ready */ | |
2306 | ret = pthread_cond_wait(&consumer_data->cond, | |
2307 | &consumer_data->cond_mutex); | |
2308 | } else { | |
2309 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2310 | &consumer_data->cond_mutex, &timeout); | |
2311 | } | |
ee0b0061 | 2312 | } |
8c0faa1d | 2313 | |
a23ec3a7 DG |
2314 | /* Release the pthread condition */ |
2315 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2316 | ||
2317 | if (ret != 0) { | |
2318 | errno = ret; | |
2319 | if (ret == ETIMEDOUT) { | |
4282f9a3 DG |
2320 | int pth_ret; |
2321 | ||
ee0b0061 DG |
2322 | /* |
2323 | * Call has timed out so we kill the kconsumerd_thread and return | |
2324 | * an error. | |
2325 | */ | |
a23ec3a7 DG |
2326 | ERR("Condition timed out. The consumer thread was never ready." |
2327 | " Killing it"); | |
4282f9a3 DG |
2328 | pth_ret = pthread_cancel(consumer_data->thread); |
2329 | if (pth_ret < 0) { | |
3bd1e081 | 2330 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2331 | } |
2332 | } else { | |
a23ec3a7 | 2333 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 | 2334 | } |
4282f9a3 DG |
2335 | /* Caller is expecting a negative value on failure. */ |
2336 | ret = -1; | |
ee0b0061 DG |
2337 | goto error; |
2338 | } | |
2339 | ||
3bd1e081 MD |
2340 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2341 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2342 | ERR("Consumerd did not start"); |
3bd1e081 | 2343 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2344 | goto error; |
2345 | } | |
3bd1e081 | 2346 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2347 | |
8c0faa1d DG |
2348 | return 0; |
2349 | ||
2350 | error: | |
2351 | return ret; | |
2352 | } | |
2353 | ||
d9800920 | 2354 | /* |
3bd1e081 | 2355 | * Join consumer thread |
d9800920 | 2356 | */ |
3bd1e081 | 2357 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2358 | { |
2359 | void *status; | |
cf3af59e | 2360 | |
e8209f6b DG |
2361 | /* Consumer pid must be a real one. */ |
2362 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2363 | int ret; |
3bd1e081 | 2364 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2365 | if (ret) { |
4a15001e | 2366 | PERROR("Error killing consumer daemon"); |
cf3af59e MD |
2367 | return ret; |
2368 | } | |
3bd1e081 | 2369 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2370 | } else { |
2371 | return 0; | |
2372 | } | |
2373 | } | |
2374 | ||
8c0faa1d | 2375 | /* |
3bd1e081 | 2376 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2377 | * |
d063d709 | 2378 | * Return pid if successful else -1. |
8c0faa1d | 2379 | */ |
3bd1e081 | 2380 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2381 | { |
2382 | int ret; | |
2383 | pid_t pid; | |
94c55f17 | 2384 | const char *consumer_to_use; |
53086306 | 2385 | const char *verbosity; |
94c55f17 | 2386 | struct stat st; |
8c0faa1d | 2387 | |
3bd1e081 | 2388 | DBG("Spawning consumerd"); |
c49dc785 | 2389 | |
8c0faa1d DG |
2390 | pid = fork(); |
2391 | if (pid == 0) { | |
2392 | /* | |
3bd1e081 | 2393 | * Exec consumerd. |
8c0faa1d | 2394 | */ |
daee5345 | 2395 | if (opt_verbose_consumer) { |
53086306 | 2396 | verbosity = "--verbose"; |
4421f712 | 2397 | } else if (lttng_opt_quiet) { |
53086306 | 2398 | verbosity = "--quiet"; |
4421f712 DG |
2399 | } else { |
2400 | verbosity = ""; | |
53086306 | 2401 | } |
4421f712 | 2402 | |
3bd1e081 MD |
2403 | switch (consumer_data->type) { |
2404 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2405 | /* |
c7704d57 DG |
2406 | * Find out which consumerd to execute. We will first try the |
2407 | * 64-bit path, then the sessiond's installation directory, and | |
2408 | * fallback on the 32-bit one, | |
94c55f17 | 2409 | */ |
63a799e8 AM |
2410 | DBG3("Looking for a kernel consumer at these locations:"); |
2411 | DBG3(" 1) %s", consumerd64_bin); | |
2412 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
2413 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 2414 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 2415 | DBG3("Found location #1"); |
94c55f17 | 2416 | consumer_to_use = consumerd64_bin; |
94c55f17 | 2417 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 2418 | DBG3("Found location #2"); |
94c55f17 | 2419 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 2420 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 2421 | DBG3("Found location #3"); |
eb1e0bd4 | 2422 | consumer_to_use = consumerd32_bin; |
94c55f17 | 2423 | } else { |
63a799e8 | 2424 | DBG("Could not find any valid consumerd executable"); |
4282f9a3 | 2425 | ret = -EINVAL; |
94c55f17 AM |
2426 | break; |
2427 | } | |
2428 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
4282f9a3 | 2429 | ret = execl(consumer_to_use, |
94c55f17 AM |
2430 | "lttng-consumerd", verbosity, "-k", |
2431 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2432 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2433 | "--group", tracing_group_name, |
94c55f17 | 2434 | NULL); |
3bd1e081 | 2435 | break; |
7753dea8 MD |
2436 | case LTTNG_CONSUMER64_UST: |
2437 | { | |
b1e0b6b6 | 2438 | char *tmpnew = NULL; |
8f4905da MD |
2439 | |
2440 | if (consumerd64_libdir[0] != '\0') { | |
2441 | char *tmp; | |
2442 | size_t tmplen; | |
2443 | ||
e8fa9fb0 | 2444 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2445 | if (!tmp) { |
2446 | tmp = ""; | |
2447 | } | |
2448 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2449 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
2450 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2451 | if (!tmpnew) { | |
2452 | ret = -ENOMEM; | |
2453 | goto error; | |
2454 | } | |
2455 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2456 | strcat(tmpnew, consumerd64_libdir); | |
2457 | if (tmp[0] != '\0') { | |
2458 | strcat(tmpnew, ":"); | |
2459 | strcat(tmpnew, tmp); | |
2460 | } | |
2461 | ret = putenv(tmpnew); | |
2462 | if (ret) { | |
2463 | ret = -errno; | |
c6f76da9 | 2464 | free(tmpnew); |
8f4905da MD |
2465 | goto error; |
2466 | } | |
2467 | } | |
94c55f17 | 2468 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 2469 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2470 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2471 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2472 | "--group", tracing_group_name, |
7753dea8 | 2473 | NULL); |
8f4905da MD |
2474 | if (consumerd64_libdir[0] != '\0') { |
2475 | free(tmpnew); | |
2476 | } | |
3bd1e081 | 2477 | break; |
7753dea8 MD |
2478 | } |
2479 | case LTTNG_CONSUMER32_UST: | |
2480 | { | |
937dde8e | 2481 | char *tmpnew = NULL; |
8f4905da MD |
2482 | |
2483 | if (consumerd32_libdir[0] != '\0') { | |
2484 | char *tmp; | |
2485 | size_t tmplen; | |
2486 | ||
e8fa9fb0 | 2487 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2488 | if (!tmp) { |
2489 | tmp = ""; | |
2490 | } | |
2491 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2492 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2493 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2494 | if (!tmpnew) { | |
2495 | ret = -ENOMEM; | |
2496 | goto error; | |
2497 | } | |
2498 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2499 | strcat(tmpnew, consumerd32_libdir); | |
2500 | if (tmp[0] != '\0') { | |
2501 | strcat(tmpnew, ":"); | |
2502 | strcat(tmpnew, tmp); | |
2503 | } | |
2504 | ret = putenv(tmpnew); | |
2505 | if (ret) { | |
2506 | ret = -errno; | |
c6f76da9 | 2507 | free(tmpnew); |
8f4905da MD |
2508 | goto error; |
2509 | } | |
2510 | } | |
94c55f17 | 2511 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 2512 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2513 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2514 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2515 | "--group", tracing_group_name, |
7753dea8 | 2516 | NULL); |
8f4905da MD |
2517 | if (consumerd32_libdir[0] != '\0') { |
2518 | free(tmpnew); | |
2519 | } | |
7753dea8 MD |
2520 | break; |
2521 | } | |
3bd1e081 | 2522 | default: |
76d7553f | 2523 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2524 | exit(EXIT_FAILURE); |
2525 | } | |
8c0faa1d | 2526 | if (errno != 0) { |
4282f9a3 | 2527 | PERROR("Consumer execl()"); |
8c0faa1d | 2528 | } |
4282f9a3 | 2529 | /* Reaching this point, we got a failure on our execl(). */ |
8c0faa1d DG |
2530 | exit(EXIT_FAILURE); |
2531 | } else if (pid > 0) { | |
2532 | ret = pid; | |
8c0faa1d | 2533 | } else { |
76d7553f | 2534 | PERROR("start consumer fork"); |
8c0faa1d | 2535 | ret = -errno; |
8c0faa1d | 2536 | } |
8f4905da | 2537 | error: |
8c0faa1d DG |
2538 | return ret; |
2539 | } | |
2540 | ||
693bd40b | 2541 | /* |
3bd1e081 | 2542 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2543 | */ |
3bd1e081 | 2544 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2545 | { |
c617c0c6 | 2546 | int ret; |
edb8b045 DG |
2547 | |
2548 | /* | |
2549 | * Set the listen() state on the socket since there is a possible race | |
2550 | * between the exec() of the consumer daemon and this call if place in the | |
2551 | * consumer thread. See bug #366 for more details. | |
2552 | */ | |
2553 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2554 | if (ret < 0) { | |
2555 | goto error; | |
2556 | } | |
693bd40b | 2557 | |
3bd1e081 MD |
2558 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2559 | if (consumer_data->pid != 0) { | |
2560 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2561 | goto end; |
2562 | } | |
693bd40b | 2563 | |
3bd1e081 | 2564 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2565 | if (ret < 0) { |
3bd1e081 MD |
2566 | ERR("Spawning consumerd failed"); |
2567 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2568 | goto error; |
693bd40b | 2569 | } |
c49dc785 | 2570 | |
3bd1e081 MD |
2571 | /* Setting up the consumer_data pid */ |
2572 | consumer_data->pid = ret; | |
48842b30 | 2573 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2574 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2575 | |
3bd1e081 MD |
2576 | DBG2("Spawning consumer control thread"); |
2577 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2578 | if (ret < 0) { |
3bd1e081 | 2579 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2580 | goto error; |
2581 | } | |
2582 | ||
c49dc785 | 2583 | end: |
693bd40b DG |
2584 | return 0; |
2585 | ||
2586 | error: | |
331744e3 | 2587 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2588 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2589 | int err; |
2590 | ||
edb8b045 DG |
2591 | err = close(consumer_data->err_sock); |
2592 | if (err < 0) { | |
2593 | PERROR("close consumer data error socket"); | |
2594 | } | |
2595 | } | |
693bd40b DG |
2596 | return ret; |
2597 | } | |
2598 | ||
b73401da | 2599 | /* |
096102bd | 2600 | * Setup necessary data for kernel tracer action. |
b73401da | 2601 | */ |
096102bd | 2602 | static int init_kernel_tracer(void) |
b73401da DG |
2603 | { |
2604 | int ret; | |
b73401da | 2605 | |
096102bd DG |
2606 | /* Modprobe lttng kernel modules */ |
2607 | ret = modprobe_lttng_control(); | |
b73401da | 2608 | if (ret < 0) { |
b73401da DG |
2609 | goto error; |
2610 | } | |
2611 | ||
096102bd DG |
2612 | /* Open debugfs lttng */ |
2613 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2614 | if (kernel_tracer_fd < 0) { | |
2615 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
2616 | ret = -1; |
2617 | goto error_open; | |
54d01ffb DG |
2618 | } |
2619 | ||
2f77fc4b DG |
2620 | /* Validate kernel version */ |
2621 | ret = kernel_validate_version(kernel_tracer_fd); | |
2622 | if (ret < 0) { | |
2623 | goto error_version; | |
b551a063 | 2624 | } |
54d01ffb | 2625 | |
2f77fc4b DG |
2626 | ret = modprobe_lttng_data(); |
2627 | if (ret < 0) { | |
2628 | goto error_modules; | |
54d01ffb DG |
2629 | } |
2630 | ||
2f77fc4b DG |
2631 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2632 | return 0; | |
2633 | ||
2634 | error_version: | |
2635 | modprobe_remove_lttng_control(); | |
2636 | ret = close(kernel_tracer_fd); | |
2637 | if (ret) { | |
2638 | PERROR("close"); | |
b551a063 | 2639 | } |
2f77fc4b | 2640 | kernel_tracer_fd = -1; |
f73fabfd | 2641 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2642 | |
2f77fc4b DG |
2643 | error_modules: |
2644 | ret = close(kernel_tracer_fd); | |
2645 | if (ret) { | |
2646 | PERROR("close"); | |
b551a063 | 2647 | } |
54d01ffb | 2648 | |
2f77fc4b DG |
2649 | error_open: |
2650 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2651 | |
2652 | error: | |
2f77fc4b DG |
2653 | WARN("No kernel tracer available"); |
2654 | kernel_tracer_fd = -1; | |
2655 | if (!is_root) { | |
f73fabfd | 2656 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2657 | } else { |
f73fabfd | 2658 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2659 | } |
54d01ffb DG |
2660 | } |
2661 | ||
2f77fc4b | 2662 | |
54d01ffb | 2663 | /* |
2f77fc4b DG |
2664 | * Copy consumer output from the tracing session to the domain session. The |
2665 | * function also applies the right modification on a per domain basis for the | |
2666 | * trace files destination directory. | |
36b588ed MD |
2667 | * |
2668 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2669 | */ |
2f77fc4b | 2670 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2671 | { |
2672 | int ret; | |
2f77fc4b DG |
2673 | const char *dir_name; |
2674 | struct consumer_output *consumer; | |
2675 | ||
2676 | assert(session); | |
2677 | assert(session->consumer); | |
54d01ffb | 2678 | |
b551a063 DG |
2679 | switch (domain) { |
2680 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2681 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2682 | /* |
2683 | * XXX: We should audit the session creation and what this function | |
2684 | * does "extra" in order to avoid a destroy since this function is used | |
2685 | * in the domain session creation (kernel and ust) only. Same for UST | |
2686 | * domain. | |
2687 | */ | |
2688 | if (session->kernel_session->consumer) { | |
2689 | consumer_destroy_output(session->kernel_session->consumer); | |
2690 | } | |
2f77fc4b DG |
2691 | session->kernel_session->consumer = |
2692 | consumer_copy_output(session->consumer); | |
2693 | /* Ease our life a bit for the next part */ | |
2694 | consumer = session->kernel_session->consumer; | |
2695 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2696 | break; |
f20baf8e | 2697 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2698 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2699 | case LTTNG_DOMAIN_PYTHON: |
b551a063 | 2700 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2701 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd DG |
2702 | if (session->ust_session->consumer) { |
2703 | consumer_destroy_output(session->ust_session->consumer); | |
2704 | } | |
2f77fc4b DG |
2705 | session->ust_session->consumer = |
2706 | consumer_copy_output(session->consumer); | |
2707 | /* Ease our life a bit for the next part */ | |
2708 | consumer = session->ust_session->consumer; | |
2709 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2710 | break; |
2711 | default: | |
f73fabfd | 2712 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2713 | goto error; |
2714 | } | |
2715 | ||
2f77fc4b | 2716 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2717 | strncat(consumer->subdir, dir_name, |
2718 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2719 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2720 | ||
f73fabfd | 2721 | ret = LTTNG_OK; |
54d01ffb DG |
2722 | |
2723 | error: | |
2724 | return ret; | |
2725 | } | |
2726 | ||
00e2e675 | 2727 | /* |
2f77fc4b | 2728 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2729 | * |
2730 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2731 | */ |
2f77fc4b DG |
2732 | static int create_ust_session(struct ltt_session *session, |
2733 | struct lttng_domain *domain) | |
00e2e675 DG |
2734 | { |
2735 | int ret; | |
2f77fc4b | 2736 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2737 | |
a4b92340 | 2738 | assert(session); |
2f77fc4b DG |
2739 | assert(domain); |
2740 | assert(session->consumer); | |
a4b92340 | 2741 | |
2f77fc4b | 2742 | switch (domain->type) { |
f20baf8e | 2743 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2744 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2745 | case LTTNG_DOMAIN_PYTHON: |
2f77fc4b DG |
2746 | case LTTNG_DOMAIN_UST: |
2747 | break; | |
2748 | default: | |
2749 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2750 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2751 | goto error; |
2752 | } | |
2753 | ||
2f77fc4b DG |
2754 | DBG("Creating UST session"); |
2755 | ||
dec56f6c | 2756 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2757 | if (lus == NULL) { |
f73fabfd | 2758 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2759 | goto error; |
2760 | } | |
2761 | ||
2f77fc4b DG |
2762 | lus->uid = session->uid; |
2763 | lus->gid = session->gid; | |
2bba9e53 | 2764 | lus->output_traces = session->output_traces; |
27babd3a | 2765 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2766 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2767 | session->ust_session = lus; |
d7ba1388 | 2768 | if (session->shm_path[0]) { |
3d071855 MD |
2769 | strncpy(lus->root_shm_path, session->shm_path, |
2770 | sizeof(lus->root_shm_path)); | |
2771 | lus->root_shm_path[sizeof(lus->root_shm_path) - 1] = '\0'; | |
d7ba1388 MD |
2772 | strncpy(lus->shm_path, session->shm_path, |
2773 | sizeof(lus->shm_path)); | |
2774 | lus->shm_path[sizeof(lus->shm_path) - 1] = '\0'; | |
2775 | strncat(lus->shm_path, "/ust", | |
2776 | sizeof(lus->shm_path) - strlen(lus->shm_path) - 1); | |
2777 | } | |
2f77fc4b DG |
2778 | /* Copy session output to the newly created UST session */ |
2779 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2780 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2781 | goto error; |
2782 | } | |
2783 | ||
f73fabfd | 2784 | return LTTNG_OK; |
00e2e675 DG |
2785 | |
2786 | error: | |
2f77fc4b DG |
2787 | free(lus); |
2788 | session->ust_session = NULL; | |
00e2e675 DG |
2789 | return ret; |
2790 | } | |
2791 | ||
2792 | /* | |
2f77fc4b | 2793 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2794 | */ |
2f77fc4b | 2795 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2796 | { |
2797 | int ret; | |
a4b92340 | 2798 | |
2f77fc4b | 2799 | DBG("Creating kernel session"); |
00e2e675 | 2800 | |
2f77fc4b DG |
2801 | ret = kernel_create_session(session, kernel_tracer_fd); |
2802 | if (ret < 0) { | |
f73fabfd | 2803 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2804 | goto error; |
2805 | } | |
2806 | ||
2f77fc4b DG |
2807 | /* Code flow safety */ |
2808 | assert(session->kernel_session); | |
2809 | ||
2810 | /* Copy session output to the newly created Kernel session */ | |
2811 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2812 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2813 | goto error; |
2814 | } | |
2815 | ||
2f77fc4b DG |
2816 | /* Create directory(ies) on local filesystem. */ |
2817 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2818 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2819 | ret = run_as_mkdir_recursive( | |
2820 | session->kernel_session->consumer->dst.trace_path, | |
2821 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2822 | if (ret < 0) { | |
2823 | if (ret != -EEXIST) { | |
2824 | ERR("Trace directory creation error"); | |
00e2e675 DG |
2825 | goto error; |
2826 | } | |
00e2e675 | 2827 | } |
2f77fc4b | 2828 | } |
00e2e675 | 2829 | |
2f77fc4b DG |
2830 | session->kernel_session->uid = session->uid; |
2831 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2832 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2833 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2834 | |
f73fabfd | 2835 | return LTTNG_OK; |
00e2e675 | 2836 | |
2f77fc4b DG |
2837 | error: |
2838 | trace_kernel_destroy_session(session->kernel_session); | |
2839 | session->kernel_session = NULL; | |
2840 | return ret; | |
2841 | } | |
00e2e675 | 2842 | |
2f77fc4b DG |
2843 | /* |
2844 | * Count number of session permitted by uid/gid. | |
2845 | */ | |
2846 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2847 | { | |
2848 | unsigned int i = 0; | |
2849 | struct ltt_session *session; | |
07424f16 | 2850 | |
2f77fc4b DG |
2851 | DBG("Counting number of available session for UID %d GID %d", |
2852 | uid, gid); | |
2853 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2854 | /* |
2f77fc4b | 2855 | * Only list the sessions the user can control. |
00e2e675 | 2856 | */ |
2f77fc4b DG |
2857 | if (!session_access_ok(session, uid, gid)) { |
2858 | continue; | |
2859 | } | |
2860 | i++; | |
a4b92340 | 2861 | } |
2f77fc4b | 2862 | return i; |
00e2e675 DG |
2863 | } |
2864 | ||
54d01ffb DG |
2865 | /* |
2866 | * Process the command requested by the lttng client within the command | |
2867 | * context structure. This function make sure that the return structure (llm) | |
2868 | * is set and ready for transmission before returning. | |
2869 | * | |
2870 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2871 | * |
2872 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2873 | * |
2874 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2875 | */ |
53a80697 MD |
2876 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2877 | int *sock_error) | |
54d01ffb | 2878 | { |
f73fabfd | 2879 | int ret = LTTNG_OK; |
44d3bd01 | 2880 | int need_tracing_session = 1; |
2e09ba09 | 2881 | int need_domain; |
54d01ffb DG |
2882 | |
2883 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2884 | ||
53a80697 MD |
2885 | *sock_error = 0; |
2886 | ||
2e09ba09 MD |
2887 | switch (cmd_ctx->lsm->cmd_type) { |
2888 | case LTTNG_CREATE_SESSION: | |
27babd3a | 2889 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2890 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
2891 | case LTTNG_DESTROY_SESSION: |
2892 | case LTTNG_LIST_SESSIONS: | |
2893 | case LTTNG_LIST_DOMAINS: | |
2894 | case LTTNG_START_TRACE: | |
2895 | case LTTNG_STOP_TRACE: | |
6d805429 | 2896 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2897 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2898 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2899 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2900 | case LTTNG_SNAPSHOT_RECORD: | |
fb198a11 | 2901 | case LTTNG_SAVE_SESSION: |
d7ba1388 | 2902 | case LTTNG_SET_SESSION_SHM_PATH: |
2e09ba09 | 2903 | need_domain = 0; |
3aace903 | 2904 | break; |
2e09ba09 MD |
2905 | default: |
2906 | need_domain = 1; | |
2907 | } | |
2908 | ||
2909 | if (opt_no_kernel && need_domain | |
2910 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2911 | if (!is_root) { |
f73fabfd | 2912 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2913 | } else { |
f73fabfd | 2914 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2915 | } |
4fba7219 DG |
2916 | goto error; |
2917 | } | |
2918 | ||
8d3113b2 DG |
2919 | /* Deny register consumer if we already have a spawned consumer. */ |
2920 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2921 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2922 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2923 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2924 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2925 | goto error; |
2926 | } | |
2927 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2928 | } | |
2929 | ||
54d01ffb DG |
2930 | /* |
2931 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2932 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2933 | * command. |
2934 | */ | |
2935 | switch(cmd_ctx->lsm->cmd_type) { | |
2936 | case LTTNG_LIST_SESSIONS: | |
2937 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2938 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2939 | case LTTNG_LIST_DOMAINS: |
2940 | case LTTNG_LIST_CHANNELS: | |
2941 | case LTTNG_LIST_EVENTS: | |
834978fd | 2942 | case LTTNG_LIST_SYSCALLS: |
54d01ffb DG |
2943 | break; |
2944 | default: | |
2945 | /* Setup lttng message with no payload */ | |
2946 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2947 | if (ret < 0) { | |
2948 | /* This label does not try to unlock the session */ | |
2949 | goto init_setup_error; | |
2950 | } | |
2951 | } | |
2952 | ||
2953 | /* Commands that DO NOT need a session. */ | |
2954 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2955 | case LTTNG_CREATE_SESSION: |
27babd3a | 2956 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2957 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 | 2958 | case LTTNG_CALIBRATE: |
54d01ffb DG |
2959 | case LTTNG_LIST_SESSIONS: |
2960 | case LTTNG_LIST_TRACEPOINTS: | |
834978fd | 2961 | case LTTNG_LIST_SYSCALLS: |
f37d259d | 2962 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
fb198a11 | 2963 | case LTTNG_SAVE_SESSION: |
44d3bd01 | 2964 | need_tracing_session = 0; |
54d01ffb DG |
2965 | break; |
2966 | default: | |
2967 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
2968 | /* |
2969 | * We keep the session list lock across _all_ commands | |
2970 | * for now, because the per-session lock does not | |
2971 | * handle teardown properly. | |
2972 | */ | |
74babd95 | 2973 | session_lock_list(); |
54d01ffb DG |
2974 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
2975 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 2976 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
2977 | goto error; |
2978 | } else { | |
2979 | /* Acquire lock for the session */ | |
2980 | session_lock(cmd_ctx->session); | |
2981 | } | |
2982 | break; | |
2983 | } | |
b389abbe | 2984 | |
5f3ecf22 DG |
2985 | /* |
2986 | * Commands that need a valid session but should NOT create one if none | |
2987 | * exists. Instead of creating one and destroying it when the command is | |
2988 | * handled, process that right before so we save some round trip in useless | |
2989 | * code path. | |
2990 | */ | |
2991 | switch (cmd_ctx->lsm->cmd_type) { | |
2992 | case LTTNG_DISABLE_CHANNEL: | |
2993 | case LTTNG_DISABLE_EVENT: | |
5f3ecf22 DG |
2994 | switch (cmd_ctx->lsm->domain.type) { |
2995 | case LTTNG_DOMAIN_KERNEL: | |
2996 | if (!cmd_ctx->session->kernel_session) { | |
2997 | ret = LTTNG_ERR_NO_CHANNEL; | |
2998 | goto error; | |
2999 | } | |
3000 | break; | |
3001 | case LTTNG_DOMAIN_JUL: | |
5cdb6027 | 3002 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3003 | case LTTNG_DOMAIN_PYTHON: |
5f3ecf22 DG |
3004 | case LTTNG_DOMAIN_UST: |
3005 | if (!cmd_ctx->session->ust_session) { | |
3006 | ret = LTTNG_ERR_NO_CHANNEL; | |
3007 | goto error; | |
3008 | } | |
3009 | break; | |
3010 | default: | |
3011 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3012 | goto error; | |
3013 | } | |
3014 | default: | |
3015 | break; | |
3016 | } | |
3017 | ||
2e09ba09 MD |
3018 | if (!need_domain) { |
3019 | goto skip_domain; | |
3020 | } | |
a4b92340 | 3021 | |
54d01ffb DG |
3022 | /* |
3023 | * Check domain type for specific "pre-action". | |
3024 | */ | |
3025 | switch (cmd_ctx->lsm->domain.type) { | |
3026 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 3027 | if (!is_root) { |
f73fabfd | 3028 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
3029 | goto error; |
3030 | } | |
3031 | ||
54d01ffb | 3032 | /* Kernel tracer check */ |
a4b35e07 | 3033 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3034 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3035 | ret = init_kernel_tracer(); |
3036 | if (ret != 0) { | |
54d01ffb DG |
3037 | goto error; |
3038 | } | |
3039 | } | |
5eb91c98 | 3040 | |
5c827ce0 DG |
3041 | /* Consumer is in an ERROR state. Report back to client */ |
3042 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3043 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3044 | goto error; |
3045 | } | |
3046 | ||
54d01ffb | 3047 | /* Need a session for kernel command */ |
44d3bd01 | 3048 | if (need_tracing_session) { |
54d01ffb | 3049 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3050 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3051 | if (ret < 0) { |
f73fabfd | 3052 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
3053 | goto error; |
3054 | } | |
b389abbe | 3055 | } |
7d29a247 | 3056 | |
54d01ffb | 3057 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3058 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3059 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 3060 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3061 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3062 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3063 | if (ret < 0) { |
f73fabfd | 3064 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 3065 | goto error; |
950131af | 3066 | } |
5c827ce0 | 3067 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
3068 | } else { |
3069 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3070 | } |
173af62f | 3071 | |
a4b92340 DG |
3072 | /* |
3073 | * The consumer was just spawned so we need to add the socket to | |
3074 | * the consumer output of the session if exist. | |
3075 | */ | |
3076 | ret = consumer_create_socket(&kconsumer_data, | |
3077 | cmd_ctx->session->kernel_session->consumer); | |
3078 | if (ret < 0) { | |
3079 | goto error; | |
173af62f | 3080 | } |
0d0c377a | 3081 | } |
5c827ce0 | 3082 | |
54d01ffb | 3083 | break; |
b9dfb167 | 3084 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3085 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3086 | case LTTNG_DOMAIN_PYTHON: |
2bdd86d4 | 3087 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3088 | { |
b51ec5b4 MD |
3089 | if (!ust_app_supported()) { |
3090 | ret = LTTNG_ERR_NO_UST; | |
3091 | goto error; | |
3092 | } | |
5c827ce0 DG |
3093 | /* Consumer is in an ERROR state. Report back to client */ |
3094 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3095 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3096 | goto error; |
3097 | } | |
3098 | ||
44d3bd01 | 3099 | if (need_tracing_session) { |
a4b92340 | 3100 | /* Create UST session if none exist. */ |
f6a9efaa | 3101 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3102 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3103 | &cmd_ctx->lsm->domain); |
f73fabfd | 3104 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
3105 | goto error; |
3106 | } | |
3107 | } | |
00e2e675 | 3108 | |
7753dea8 MD |
3109 | /* Start the UST consumer daemons */ |
3110 | /* 64-bit */ | |
3111 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 3112 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 3113 | ustconsumer64_data.pid == 0 && |
785d2d0d | 3114 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3115 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3116 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3117 | if (ret < 0) { |
f73fabfd | 3118 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 3119 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
3120 | goto error; |
3121 | } | |
48842b30 | 3122 | |
173af62f | 3123 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 3124 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3125 | } else { |
7753dea8 MD |
3126 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3127 | } | |
173af62f DG |
3128 | |
3129 | /* | |
3130 | * Setup socket for consumer 64 bit. No need for atomic access | |
3131 | * since it was set above and can ONLY be set in this thread. | |
3132 | */ | |
a4b92340 DG |
3133 | ret = consumer_create_socket(&ustconsumer64_data, |
3134 | cmd_ctx->session->ust_session->consumer); | |
3135 | if (ret < 0) { | |
3136 | goto error; | |
173af62f DG |
3137 | } |
3138 | ||
7753dea8 | 3139 | /* 32-bit */ |
385b881b | 3140 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); |
fc7a59ce | 3141 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 3142 | ustconsumer32_data.pid == 0 && |
785d2d0d | 3143 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3144 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
3145 | ret = start_consumerd(&ustconsumer32_data); | |
3146 | if (ret < 0) { | |
f73fabfd | 3147 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 3148 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
3149 | goto error; |
3150 | } | |
5c827ce0 | 3151 | |
173af62f | 3152 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 3153 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3154 | } else { |
3155 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3156 | } |
173af62f DG |
3157 | |
3158 | /* | |
3159 | * Setup socket for consumer 64 bit. No need for atomic access | |
3160 | * since it was set above and can ONLY be set in this thread. | |
3161 | */ | |
a4b92340 DG |
3162 | ret = consumer_create_socket(&ustconsumer32_data, |
3163 | cmd_ctx->session->ust_session->consumer); | |
3164 | if (ret < 0) { | |
3165 | goto error; | |
173af62f | 3166 | } |
44d3bd01 DG |
3167 | } |
3168 | break; | |
48842b30 | 3169 | } |
54d01ffb | 3170 | default: |
54d01ffb DG |
3171 | break; |
3172 | } | |
2e09ba09 | 3173 | skip_domain: |
33a2b854 | 3174 | |
5c827ce0 DG |
3175 | /* Validate consumer daemon state when start/stop trace command */ |
3176 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3177 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3178 | switch (cmd_ctx->lsm->domain.type) { | |
b9dfb167 | 3179 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3180 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3181 | case LTTNG_DOMAIN_PYTHON: |
5c827ce0 DG |
3182 | case LTTNG_DOMAIN_UST: |
3183 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3184 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3185 | goto error; |
3186 | } | |
3187 | break; | |
3188 | case LTTNG_DOMAIN_KERNEL: | |
3189 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3190 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3191 | goto error; |
3192 | } | |
3193 | break; | |
3194 | } | |
3195 | } | |
3196 | ||
8e0af1b4 MD |
3197 | /* |
3198 | * Check that the UID or GID match that of the tracing session. | |
3199 | * The root user can interact with all sessions. | |
3200 | */ | |
3201 | if (need_tracing_session) { | |
3202 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3203 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3204 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 3205 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
3206 | goto error; |
3207 | } | |
3208 | } | |
3209 | ||
ffe60014 DG |
3210 | /* |
3211 | * Send relayd information to consumer as soon as we have a domain and a | |
3212 | * session defined. | |
3213 | */ | |
3214 | if (cmd_ctx->session && need_domain) { | |
3215 | /* | |
3216 | * Setup relayd if not done yet. If the relayd information was already | |
3217 | * sent to the consumer, this call will gracefully return. | |
3218 | */ | |
3219 | ret = cmd_setup_relayd(cmd_ctx->session); | |
3220 | if (ret != LTTNG_OK) { | |
3221 | goto error; | |
3222 | } | |
3223 | } | |
3224 | ||
54d01ffb DG |
3225 | /* Process by command type */ |
3226 | switch (cmd_ctx->lsm->cmd_type) { | |
3227 | case LTTNG_ADD_CONTEXT: | |
3228 | { | |
3229 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3230 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 3231 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
3232 | break; |
3233 | } | |
3234 | case LTTNG_DISABLE_CHANNEL: | |
3235 | { | |
3236 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3237 | cmd_ctx->lsm->u.disable.channel_name); | |
3238 | break; | |
3239 | } | |
3240 | case LTTNG_DISABLE_EVENT: | |
3241 | { | |
6e911cad MD |
3242 | /* FIXME: passing packed structure to non-packed pointer */ |
3243 | /* TODO: handle filter */ | |
54d01ffb DG |
3244 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3245 | cmd_ctx->lsm->u.disable.channel_name, | |
6e911cad | 3246 | &cmd_ctx->lsm->u.disable.event); |
33a2b854 DG |
3247 | break; |
3248 | } | |
54d01ffb DG |
3249 | case LTTNG_ENABLE_CHANNEL: |
3250 | { | |
7972aab2 | 3251 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 3252 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
3253 | break; |
3254 | } | |
3255 | case LTTNG_ENABLE_EVENT: | |
3256 | { | |
882ef835 JI |
3257 | struct lttng_event_exclusion *exclusion = NULL; |
3258 | struct lttng_filter_bytecode *bytecode = NULL; | |
6b453b5e | 3259 | char *filter_expression = NULL; |
882ef835 | 3260 | |
67676bd8 DG |
3261 | /* Handle exclusion events and receive it from the client. */ |
3262 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3263 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3264 | ||
3265 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3266 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3267 | if (!exclusion) { | |
3268 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3269 | goto error; | |
882ef835 | 3270 | } |
882ef835 | 3271 | |
67676bd8 DG |
3272 | DBG("Receiving var len exclusion event list from client ..."); |
3273 | exclusion->count = count; | |
3274 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3275 | count * LTTNG_SYMBOL_NAME_LEN); | |
3276 | if (ret <= 0) { | |
3277 | DBG("Nothing recv() from client var len data... continuing"); | |
3278 | *sock_error = 1; | |
3279 | free(exclusion); | |
3280 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3281 | goto error; | |
3282 | } | |
3283 | } | |
3284 | ||
6b453b5e JG |
3285 | /* Get filter expression from client. */ |
3286 | if (cmd_ctx->lsm->u.enable.expression_len > 0) { | |
3287 | size_t expression_len = | |
3288 | cmd_ctx->lsm->u.enable.expression_len; | |
3289 | ||
3290 | if (expression_len > LTTNG_FILTER_MAX_LEN) { | |
3291 | ret = LTTNG_ERR_FILTER_INVAL; | |
3292 | free(exclusion); | |
3293 | goto error; | |
3294 | } | |
3295 | ||
3296 | filter_expression = zmalloc(expression_len); | |
3297 | if (!filter_expression) { | |
3298 | free(exclusion); | |
3299 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3300 | goto error; | |
3301 | } | |
3302 | ||
3303 | /* Receive var. len. data */ | |
3304 | DBG("Receiving var len filter's expression from client ..."); | |
3305 | ret = lttcomm_recv_unix_sock(sock, filter_expression, | |
3306 | expression_len); | |
3307 | if (ret <= 0) { | |
3308 | DBG("Nothing recv() from client car len data... continuing"); | |
3309 | *sock_error = 1; | |
3310 | free(filter_expression); | |
3311 | free(exclusion); | |
3312 | ret = LTTNG_ERR_FILTER_INVAL; | |
3313 | goto error; | |
3314 | } | |
3315 | } | |
3316 | ||
67676bd8 DG |
3317 | /* Handle filter and get bytecode from client. */ |
3318 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3319 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3320 | ||
3321 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3322 | ret = LTTNG_ERR_FILTER_INVAL; | |
49d21f93 | 3323 | free(filter_expression); |
67676bd8 DG |
3324 | free(exclusion); |
3325 | goto error; | |
3326 | } | |
3327 | ||
3328 | bytecode = zmalloc(bytecode_len); | |
3329 | if (!bytecode) { | |
49d21f93 | 3330 | free(filter_expression); |
67676bd8 DG |
3331 | free(exclusion); |
3332 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3333 | goto error; | |
882ef835 JI |
3334 | } |
3335 | ||
67676bd8 DG |
3336 | /* Receive var. len. data */ |
3337 | DBG("Receiving var len filter's bytecode from client ..."); | |
3338 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3339 | if (ret <= 0) { | |
3340 | DBG("Nothing recv() from client car len data... continuing"); | |
3341 | *sock_error = 1; | |
49d21f93 | 3342 | free(filter_expression); |
67676bd8 DG |
3343 | free(bytecode); |
3344 | free(exclusion); | |
3345 | ret = LTTNG_ERR_FILTER_INVAL; | |
3346 | goto error; | |
3347 | } | |
3348 | ||
3349 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
49d21f93 | 3350 | free(filter_expression); |
67676bd8 DG |
3351 | free(bytecode); |
3352 | free(exclusion); | |
3353 | ret = LTTNG_ERR_FILTER_INVAL; | |
3354 | goto error; | |
3355 | } | |
882ef835 | 3356 | } |
67676bd8 DG |
3357 | |
3358 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3359 | cmd_ctx->lsm->u.enable.channel_name, | |
6b453b5e JG |
3360 | &cmd_ctx->lsm->u.enable.event, |
3361 | filter_expression, bytecode, exclusion, | |
67676bd8 | 3362 | kernel_poll_pipe[1]); |
54d01ffb DG |
3363 | break; |
3364 | } | |
052da939 | 3365 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3366 | { |
9f19cc17 | 3367 | struct lttng_event *events; |
54d01ffb | 3368 | ssize_t nb_events; |
052da939 | 3369 | |
0845bbfa | 3370 | session_lock_list(); |
54d01ffb | 3371 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
0845bbfa | 3372 | session_unlock_list(); |
54d01ffb | 3373 | if (nb_events < 0) { |
f73fabfd | 3374 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3375 | ret = -nb_events; |
3376 | goto error; | |
2ef84c95 DG |
3377 | } |
3378 | ||
3379 | /* | |
3380 | * Setup lttng message with payload size set to the event list size in | |
3381 | * bytes and then copy list into the llm payload. | |
3382 | */ | |
052da939 | 3383 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3384 | if (ret < 0) { |
052da939 | 3385 | free(events); |
2ef84c95 DG |
3386 | goto setup_error; |
3387 | } | |
3388 | ||
3389 | /* Copy event list into message payload */ | |
9f19cc17 | 3390 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3391 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3392 | |
9f19cc17 | 3393 | free(events); |
2ef84c95 | 3394 | |
f73fabfd | 3395 | ret = LTTNG_OK; |
2ef84c95 DG |
3396 | break; |
3397 | } | |
f37d259d MD |
3398 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3399 | { | |
3400 | struct lttng_event_field *fields; | |
3401 | ssize_t nb_fields; | |
3402 | ||
0845bbfa | 3403 | session_lock_list(); |
a4b92340 DG |
3404 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3405 | &fields); | |
0845bbfa | 3406 | session_unlock_list(); |
f37d259d | 3407 | if (nb_fields < 0) { |
f73fabfd | 3408 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3409 | ret = -nb_fields; |
3410 | goto error; | |
3411 | } | |
3412 | ||
3413 | /* | |
3414 | * Setup lttng message with payload size set to the event list size in | |
3415 | * bytes and then copy list into the llm payload. | |
3416 | */ | |
a4b92340 DG |
3417 | ret = setup_lttng_msg(cmd_ctx, |
3418 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
3419 | if (ret < 0) { |
3420 | free(fields); | |
3421 | goto setup_error; | |
3422 | } | |
3423 | ||
3424 | /* Copy event list into message payload */ | |
3425 | memcpy(cmd_ctx->llm->payload, fields, | |
3426 | sizeof(struct lttng_event_field) * nb_fields); | |
3427 | ||
3428 | free(fields); | |
3429 | ||
f73fabfd | 3430 | ret = LTTNG_OK; |
f37d259d MD |
3431 | break; |
3432 | } | |
834978fd DG |
3433 | case LTTNG_LIST_SYSCALLS: |
3434 | { | |
3435 | struct lttng_event *events; | |
3436 | ssize_t nb_events; | |
3437 | ||
3438 | nb_events = cmd_list_syscalls(&events); | |
3439 | if (nb_events < 0) { | |
3440 | /* Return value is a negative lttng_error_code. */ | |
3441 | ret = -nb_events; | |
3442 | goto error; | |
3443 | } | |
3444 | ||
3445 | /* | |
3446 | * Setup lttng message with payload size set to the event list size in | |
3447 | * bytes and then copy list into the llm payload. | |
3448 | */ | |
3449 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); | |
3450 | if (ret < 0) { | |
3451 | free(events); | |
3452 | goto setup_error; | |
3453 | } | |
3454 | ||
3455 | /* Copy event list into message payload */ | |
3456 | memcpy(cmd_ctx->llm->payload, events, | |
3457 | sizeof(struct lttng_event) * nb_events); | |
3458 | ||
3459 | free(events); | |
3460 | ||
3461 | ret = LTTNG_OK; | |
3462 | break; | |
3463 | } | |
00e2e675 DG |
3464 | case LTTNG_SET_CONSUMER_URI: |
3465 | { | |
a4b92340 DG |
3466 | size_t nb_uri, len; |
3467 | struct lttng_uri *uris; | |
3468 | ||
3469 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3470 | len = nb_uri * sizeof(struct lttng_uri); | |
3471 | ||
3472 | if (nb_uri == 0) { | |
f73fabfd | 3473 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3474 | goto error; |
3475 | } | |
3476 | ||
3477 | uris = zmalloc(len); | |
3478 | if (uris == NULL) { | |
f73fabfd | 3479 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3480 | goto error; |
3481 | } | |
3482 | ||
3483 | /* Receive variable len data */ | |
77c7c900 | 3484 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3485 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3486 | if (ret <= 0) { | |
3487 | DBG("No URIs received from client... continuing"); | |
3488 | *sock_error = 1; | |
f73fabfd | 3489 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3490 | free(uris); |
a4b92340 DG |
3491 | goto error; |
3492 | } | |
3493 | ||
bda32d56 JG |
3494 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); |
3495 | free(uris); | |
f73fabfd | 3496 | if (ret != LTTNG_OK) { |
a4b92340 DG |
3497 | goto error; |
3498 | } | |
3499 | ||
b1d41407 | 3500 | |
00e2e675 DG |
3501 | break; |
3502 | } | |
f3ed775e | 3503 | case LTTNG_START_TRACE: |
8c0faa1d | 3504 | { |
54d01ffb | 3505 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3506 | break; |
3507 | } | |
f3ed775e | 3508 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3509 | { |
54d01ffb | 3510 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3511 | break; |
3512 | } | |
5e16da05 MD |
3513 | case LTTNG_CREATE_SESSION: |
3514 | { | |
a4b92340 DG |
3515 | size_t nb_uri, len; |
3516 | struct lttng_uri *uris = NULL; | |
3517 | ||
3518 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3519 | len = nb_uri * sizeof(struct lttng_uri); | |
3520 | ||
3521 | if (nb_uri > 0) { | |
3522 | uris = zmalloc(len); | |
3523 | if (uris == NULL) { | |
f73fabfd | 3524 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3525 | goto error; |
3526 | } | |
3527 | ||
3528 | /* Receive variable len data */ | |
77c7c900 | 3529 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3530 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3531 | if (ret <= 0) { | |
3532 | DBG("No URIs received from client... continuing"); | |
3533 | *sock_error = 1; | |
f73fabfd | 3534 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3535 | free(uris); |
a4b92340 DG |
3536 | goto error; |
3537 | } | |
3538 | ||
3539 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3540 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3541 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3542 | free(uris); |
a4b92340 DG |
3543 | goto error; |
3544 | } | |
3545 | } | |
3546 | ||
3547 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3548 | &cmd_ctx->creds, 0); |
a4b92340 | 3549 | |
b1d41407 DG |
3550 | free(uris); |
3551 | ||
00e2e675 DG |
3552 | break; |
3553 | } | |
5e16da05 MD |
3554 | case LTTNG_DESTROY_SESSION: |
3555 | { | |
2f77fc4b | 3556 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3557 | |
3558 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3559 | cmd_ctx->session = NULL; |
5461b305 | 3560 | break; |
5e16da05 | 3561 | } |
9f19cc17 | 3562 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3563 | { |
54d01ffb | 3564 | ssize_t nb_dom; |
fa64dfb4 | 3565 | struct lttng_domain *domains = NULL; |
5461b305 | 3566 | |
54d01ffb DG |
3567 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3568 | if (nb_dom < 0) { | |
f73fabfd | 3569 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3570 | ret = -nb_dom; |
3571 | goto error; | |
ce3d728c | 3572 | } |
520ff687 | 3573 | |
54d01ffb | 3574 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 | 3575 | if (ret < 0) { |
ae9c20bc | 3576 | free(domains); |
5461b305 | 3577 | goto setup_error; |
520ff687 | 3578 | } |
57167058 | 3579 | |
54d01ffb DG |
3580 | /* Copy event list into message payload */ |
3581 | memcpy(cmd_ctx->llm->payload, domains, | |
3582 | nb_dom * sizeof(struct lttng_domain)); | |
3583 | ||
3584 | free(domains); | |
5e16da05 | 3585 | |
f73fabfd | 3586 | ret = LTTNG_OK; |
5e16da05 MD |
3587 | break; |
3588 | } | |
9f19cc17 | 3589 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3590 | { |
6775595e | 3591 | int nb_chan; |
ade7ce52 | 3592 | struct lttng_channel *channels = NULL; |
54d01ffb | 3593 | |
b551a063 DG |
3594 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3595 | cmd_ctx->session, &channels); | |
54d01ffb | 3596 | if (nb_chan < 0) { |
f73fabfd | 3597 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3598 | ret = -nb_chan; |
3599 | goto error; | |
5461b305 | 3600 | } |
ca95a216 | 3601 | |
54d01ffb | 3602 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 | 3603 | if (ret < 0) { |
ae9c20bc | 3604 | free(channels); |
5461b305 DG |
3605 | goto setup_error; |
3606 | } | |
9f19cc17 | 3607 | |
54d01ffb DG |
3608 | /* Copy event list into message payload */ |
3609 | memcpy(cmd_ctx->llm->payload, channels, | |
3610 | nb_chan * sizeof(struct lttng_channel)); | |
3611 | ||
3612 | free(channels); | |
9f19cc17 | 3613 | |
f73fabfd | 3614 | ret = LTTNG_OK; |
5461b305 | 3615 | break; |
5e16da05 | 3616 | } |
9f19cc17 | 3617 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3618 | { |
b551a063 | 3619 | ssize_t nb_event; |
684d34d2 | 3620 | struct lttng_event *events = NULL; |
9f19cc17 | 3621 | |
b551a063 | 3622 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3623 | cmd_ctx->lsm->u.list.channel_name, &events); |
3624 | if (nb_event < 0) { | |
f73fabfd | 3625 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3626 | ret = -nb_event; |
3627 | goto error; | |
5461b305 | 3628 | } |
ca95a216 | 3629 | |
54d01ffb | 3630 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 | 3631 | if (ret < 0) { |
ae9c20bc | 3632 | free(events); |
5461b305 DG |
3633 | goto setup_error; |
3634 | } | |
9f19cc17 | 3635 | |
54d01ffb DG |
3636 | /* Copy event list into message payload */ |
3637 | memcpy(cmd_ctx->llm->payload, events, | |
3638 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3639 | |
54d01ffb | 3640 | free(events); |
9f19cc17 | 3641 | |
f73fabfd | 3642 | ret = LTTNG_OK; |
5461b305 | 3643 | break; |
5e16da05 MD |
3644 | } |
3645 | case LTTNG_LIST_SESSIONS: | |
3646 | { | |
8e0af1b4 | 3647 | unsigned int nr_sessions; |
5461b305 | 3648 | |
8e0af1b4 | 3649 | session_lock_list(); |
730389d9 DG |
3650 | nr_sessions = lttng_sessions_count( |
3651 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3652 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3653 | |
8e0af1b4 | 3654 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3655 | if (ret < 0) { |
54d01ffb | 3656 | session_unlock_list(); |
5461b305 | 3657 | goto setup_error; |
e065084a | 3658 | } |
5e16da05 | 3659 | |
6c9cc2ab | 3660 | /* Filled the session array */ |
2f77fc4b | 3661 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3662 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3663 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3664 | |
54d01ffb | 3665 | session_unlock_list(); |
5e16da05 | 3666 | |
f73fabfd | 3667 | ret = LTTNG_OK; |
5e16da05 MD |
3668 | break; |
3669 | } | |
d0254c7c MD |
3670 | case LTTNG_CALIBRATE: |
3671 | { | |
54d01ffb DG |
3672 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3673 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3674 | break; |
3675 | } | |
d9800920 DG |
3676 | case LTTNG_REGISTER_CONSUMER: |
3677 | { | |
2f77fc4b DG |
3678 | struct consumer_data *cdata; |
3679 | ||
3680 | switch (cmd_ctx->lsm->domain.type) { | |
3681 | case LTTNG_DOMAIN_KERNEL: | |
3682 | cdata = &kconsumer_data; | |
3683 | break; | |
3684 | default: | |
f73fabfd | 3685 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3686 | goto error; |
3687 | } | |
3688 | ||
54d01ffb | 3689 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3690 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3691 | break; |
3692 | } | |
6d805429 | 3693 | case LTTNG_DATA_PENDING: |
806e2684 | 3694 | { |
6d805429 | 3695 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
3696 | break; |
3697 | } | |
da3c9ec1 DG |
3698 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3699 | { | |
6dc3064a DG |
3700 | struct lttcomm_lttng_output_id reply; |
3701 | ||
3702 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3703 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3704 | if (ret != LTTNG_OK) { | |
3705 | goto error; | |
3706 | } | |
3707 | ||
3708 | ret = setup_lttng_msg(cmd_ctx, sizeof(reply)); | |
3709 | if (ret < 0) { | |
3710 | goto setup_error; | |
3711 | } | |
3712 | ||
3713 | /* Copy output list into message payload */ | |
3714 | memcpy(cmd_ctx->llm->payload, &reply, sizeof(reply)); | |
3715 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3716 | break; |
3717 | } | |
3718 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3719 | { | |
6dc3064a DG |
3720 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3721 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3722 | break; |
3723 | } | |
3724 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3725 | { | |
6dc3064a DG |
3726 | ssize_t nb_output; |
3727 | struct lttng_snapshot_output *outputs = NULL; | |
3728 | ||
3729 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
3730 | if (nb_output < 0) { | |
3731 | ret = -nb_output; | |
3732 | goto error; | |
3733 | } | |
3734 | ||
3735 | ret = setup_lttng_msg(cmd_ctx, | |
3736 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3737 | if (ret < 0) { | |
3738 | free(outputs); | |
3739 | goto setup_error; | |
3740 | } | |
3741 | ||
3742 | if (outputs) { | |
3743 | /* Copy output list into message payload */ | |
3744 | memcpy(cmd_ctx->llm->payload, outputs, | |
3745 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3746 | free(outputs); | |
3747 | } | |
3748 | ||
3749 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3750 | break; |
3751 | } | |
3752 | case LTTNG_SNAPSHOT_RECORD: | |
3753 | { | |
6dc3064a DG |
3754 | ret = cmd_snapshot_record(cmd_ctx->session, |
3755 | &cmd_ctx->lsm->u.snapshot_record.output, | |
3756 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
3757 | break; |
3758 | } | |
27babd3a DG |
3759 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
3760 | { | |
3761 | size_t nb_uri, len; | |
3762 | struct lttng_uri *uris = NULL; | |
3763 | ||
3764 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3765 | len = nb_uri * sizeof(struct lttng_uri); | |
3766 | ||
3767 | if (nb_uri > 0) { | |
3768 | uris = zmalloc(len); | |
3769 | if (uris == NULL) { | |
3770 | ret = LTTNG_ERR_FATAL; | |
3771 | goto error; | |
3772 | } | |
3773 | ||
3774 | /* Receive variable len data */ | |
3775 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3776 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3777 | if (ret <= 0) { | |
3778 | DBG("No URIs received from client... continuing"); | |
3779 | *sock_error = 1; | |
3780 | ret = LTTNG_ERR_SESSION_FAIL; | |
3781 | free(uris); | |
3782 | goto error; | |
3783 | } | |
3784 | ||
3785 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3786 | DBG("Creating session with ONE network URI is a bad call"); | |
3787 | ret = LTTNG_ERR_SESSION_FAIL; | |
3788 | free(uris); | |
3789 | goto error; | |
3790 | } | |
3791 | } | |
3792 | ||
3793 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
3794 | nb_uri, &cmd_ctx->creds); | |
3795 | free(uris); | |
3796 | break; | |
3797 | } | |
ecc48a90 JD |
3798 | case LTTNG_CREATE_SESSION_LIVE: |
3799 | { | |
3800 | size_t nb_uri, len; | |
3801 | struct lttng_uri *uris = NULL; | |
3802 | ||
3803 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3804 | len = nb_uri * sizeof(struct lttng_uri); | |
3805 | ||
3806 | if (nb_uri > 0) { | |
3807 | uris = zmalloc(len); | |
3808 | if (uris == NULL) { | |
3809 | ret = LTTNG_ERR_FATAL; | |
3810 | goto error; | |
3811 | } | |
3812 | ||
3813 | /* Receive variable len data */ | |
3814 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3815 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3816 | if (ret <= 0) { | |
3817 | DBG("No URIs received from client... continuing"); | |
3818 | *sock_error = 1; | |
3819 | ret = LTTNG_ERR_SESSION_FAIL; | |
3820 | free(uris); | |
3821 | goto error; | |
3822 | } | |
3823 | ||
3824 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3825 | DBG("Creating session with ONE network URI is a bad call"); | |
3826 | ret = LTTNG_ERR_SESSION_FAIL; | |
3827 | free(uris); | |
3828 | goto error; | |
3829 | } | |
3830 | } | |
3831 | ||
3832 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
3833 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
3834 | free(uris); | |
3835 | break; | |
3836 | } | |
fb198a11 JG |
3837 | case LTTNG_SAVE_SESSION: |
3838 | { | |
3839 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
3840 | &cmd_ctx->creds); | |
3841 | break; | |
3842 | } | |
d7ba1388 MD |
3843 | case LTTNG_SET_SESSION_SHM_PATH: |
3844 | { | |
3845 | ret = cmd_set_session_shm_path(cmd_ctx->session, | |
3846 | cmd_ctx->lsm->u.set_shm_path.shm_path); | |
3847 | break; | |
3848 | } | |
5e16da05 | 3849 | default: |
f73fabfd | 3850 | ret = LTTNG_ERR_UND; |
5461b305 | 3851 | break; |
fac6795d DG |
3852 | } |
3853 | ||
5461b305 | 3854 | error: |
5461b305 DG |
3855 | if (cmd_ctx->llm == NULL) { |
3856 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3857 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3858 | goto setup_error; |
3859 | } | |
3860 | } | |
54d01ffb | 3861 | /* Set return code */ |
5461b305 | 3862 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3863 | setup_error: |
b5541356 | 3864 | if (cmd_ctx->session) { |
54d01ffb | 3865 | session_unlock(cmd_ctx->session); |
b5541356 | 3866 | } |
256a5576 MD |
3867 | if (need_tracing_session) { |
3868 | session_unlock_list(); | |
3869 | } | |
54d01ffb | 3870 | init_setup_error: |
8028d920 | 3871 | return ret; |
fac6795d DG |
3872 | } |
3873 | ||
44a5e5eb DG |
3874 | /* |
3875 | * Thread managing health check socket. | |
3876 | */ | |
3877 | static void *thread_manage_health(void *data) | |
3878 | { | |
eb4a2943 | 3879 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
3880 | uint32_t revents, nb_fd; |
3881 | struct lttng_poll_event events; | |
0c89d795 MD |
3882 | struct health_comm_msg msg; |
3883 | struct health_comm_reply reply; | |
44a5e5eb DG |
3884 | |
3885 | DBG("[thread] Manage health check started"); | |
3886 | ||
3887 | rcu_register_thread(); | |
3888 | ||
6d737ce4 DG |
3889 | /* We might hit an error path before this is created. */ |
3890 | lttng_poll_init(&events); | |
3cc04881 | 3891 | |
44a5e5eb DG |
3892 | /* Create unix socket */ |
3893 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
3894 | if (sock < 0) { | |
3895 | ERR("Unable to create health check Unix socket"); | |
3896 | ret = -1; | |
3897 | goto error; | |
3898 | } | |
3899 | ||
6c71277b MD |
3900 | if (is_root) { |
3901 | /* lttng health client socket path permissions */ | |
3902 | ret = chown(health_unix_sock_path, 0, | |
3903 | utils_get_group_id(tracing_group_name)); | |
3904 | if (ret < 0) { | |
3905 | ERR("Unable to set group on %s", health_unix_sock_path); | |
3906 | PERROR("chown"); | |
3907 | ret = -1; | |
3908 | goto error; | |
3909 | } | |
3910 | ||
3911 | ret = chmod(health_unix_sock_path, | |
3912 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3913 | if (ret < 0) { | |
3914 | ERR("Unable to set permissions on %s", health_unix_sock_path); | |
3915 | PERROR("chmod"); | |
3916 | ret = -1; | |
3917 | goto error; | |
3918 | } | |
3919 | } | |
3920 | ||
b662582b DG |
3921 | /* |
3922 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3923 | * show must go on. | |
3924 | */ | |
3925 | (void) utils_set_fd_cloexec(sock); | |
3926 | ||
44a5e5eb DG |
3927 | ret = lttcomm_listen_unix_sock(sock); |
3928 | if (ret < 0) { | |
3929 | goto error; | |
3930 | } | |
3931 | ||
3932 | /* | |
3933 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3934 | * more will be added to this poll set. | |
3935 | */ | |
d0b96690 | 3936 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
3937 | if (ret < 0) { |
3938 | goto error; | |
3939 | } | |
3940 | ||
3941 | /* Add the application registration socket */ | |
3942 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
3943 | if (ret < 0) { | |
3944 | goto error; | |
3945 | } | |
3946 | ||
ef367a93 | 3947 | sessiond_notify_ready(); |
97bc1426 | 3948 | |
44a5e5eb DG |
3949 | while (1) { |
3950 | DBG("Health check ready"); | |
3951 | ||
44a5e5eb DG |
3952 | /* Inifinite blocking call, waiting for transmission */ |
3953 | restart: | |
3954 | ret = lttng_poll_wait(&events, -1); | |
3955 | if (ret < 0) { | |
3956 | /* | |
3957 | * Restart interrupted system call. | |
3958 | */ | |
3959 | if (errno == EINTR) { | |
3960 | goto restart; | |
3961 | } | |
3962 | goto error; | |
3963 | } | |
3964 | ||
0d9c5d77 DG |
3965 | nb_fd = ret; |
3966 | ||
44a5e5eb DG |
3967 | for (i = 0; i < nb_fd; i++) { |
3968 | /* Fetch once the poll data */ | |
3969 | revents = LTTNG_POLL_GETEV(&events, i); | |
3970 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3971 | ||
fd20dac9 MD |
3972 | if (!revents) { |
3973 | /* No activity for this FD (poll implementation). */ | |
3974 | continue; | |
3975 | } | |
3976 | ||
44a5e5eb | 3977 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 3978 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 3979 | if (ret) { |
139ac872 MD |
3980 | err = 0; |
3981 | goto exit; | |
44a5e5eb DG |
3982 | } |
3983 | ||
3984 | /* Event on the registration socket */ | |
3985 | if (pollfd == sock) { | |
3986 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3987 | ERR("Health socket poll error"); | |
3988 | goto error; | |
3989 | } | |
3990 | } | |
3991 | } | |
3992 | ||
3993 | new_sock = lttcomm_accept_unix_sock(sock); | |
3994 | if (new_sock < 0) { | |
3995 | goto error; | |
3996 | } | |
3997 | ||
b662582b DG |
3998 | /* |
3999 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4000 | * show must go on. | |
4001 | */ | |
4002 | (void) utils_set_fd_cloexec(new_sock); | |
4003 | ||
44a5e5eb DG |
4004 | DBG("Receiving data from client for health..."); |
4005 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
4006 | if (ret <= 0) { | |
4007 | DBG("Nothing recv() from client... continuing"); | |
4008 | ret = close(new_sock); | |
4009 | if (ret) { | |
4010 | PERROR("close"); | |
4011 | } | |
4012 | new_sock = -1; | |
4013 | continue; | |
4014 | } | |
4015 | ||
4016 | rcu_thread_online(); | |
4017 | ||
53efb85a | 4018 | memset(&reply, 0, sizeof(reply)); |
6c71277b MD |
4019 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { |
4020 | /* | |
4021 | * health_check_state returns 0 if health is | |
4022 | * bad. | |
4023 | */ | |
4024 | if (!health_check_state(health_sessiond, i)) { | |
4025 | reply.ret_code |= 1ULL << i; | |
4026 | } | |
44a5e5eb DG |
4027 | } |
4028 | ||
6c71277b | 4029 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
4030 | |
4031 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
4032 | if (ret < 0) { | |
4033 | ERR("Failed to send health data back to client"); | |
4034 | } | |
4035 | ||
4036 | /* End of transmission */ | |
4037 | ret = close(new_sock); | |
4038 | if (ret) { | |
4039 | PERROR("close"); | |
4040 | } | |
4041 | new_sock = -1; | |
4042 | } | |
4043 | ||
139ac872 | 4044 | exit: |
44a5e5eb | 4045 | error: |
139ac872 MD |
4046 | if (err) { |
4047 | ERR("Health error occurred in %s", __func__); | |
4048 | } | |
44a5e5eb DG |
4049 | DBG("Health check thread dying"); |
4050 | unlink(health_unix_sock_path); | |
4051 | if (sock >= 0) { | |
4052 | ret = close(sock); | |
4053 | if (ret) { | |
4054 | PERROR("close"); | |
4055 | } | |
4056 | } | |
44a5e5eb DG |
4057 | |
4058 | lttng_poll_clean(&events); | |
4059 | ||
4060 | rcu_unregister_thread(); | |
4061 | return NULL; | |
4062 | } | |
4063 | ||
1d4b027a | 4064 | /* |
d063d709 DG |
4065 | * This thread manage all clients request using the unix client socket for |
4066 | * communication. | |
1d4b027a DG |
4067 | */ |
4068 | static void *thread_manage_clients(void *data) | |
4069 | { | |
139ac872 | 4070 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 4071 | int sock_error; |
5eb91c98 | 4072 | uint32_t revents, nb_fd; |
273ea72c | 4073 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 4074 | struct lttng_poll_event events; |
1d4b027a DG |
4075 | |
4076 | DBG("[thread] Manage client started"); | |
4077 | ||
f6a9efaa DG |
4078 | rcu_register_thread(); |
4079 | ||
6c71277b | 4080 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 4081 | |
840cb59c | 4082 | health_code_update(); |
44a5e5eb | 4083 | |
1d4b027a DG |
4084 | ret = lttcomm_listen_unix_sock(client_sock); |
4085 | if (ret < 0) { | |
35df2755 | 4086 | goto error_listen; |
1d4b027a DG |
4087 | } |
4088 | ||
5eb91c98 DG |
4089 | /* |
4090 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4091 | * more will be added to this poll set. | |
4092 | */ | |
d0b96690 | 4093 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 4094 | if (ret < 0) { |
35df2755 | 4095 | goto error_create_poll; |
5eb91c98 | 4096 | } |
273ea72c | 4097 | |
5eb91c98 DG |
4098 | /* Add the application registration socket */ |
4099 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
4100 | if (ret < 0) { | |
4101 | goto error; | |
4102 | } | |
273ea72c | 4103 | |
ef367a93 JG |
4104 | sessiond_notify_ready(); |
4105 | ret = sem_post(&load_info->message_thread_ready); | |
4106 | if (ret) { | |
4107 | PERROR("sem_post message_thread_ready"); | |
4108 | goto error; | |
4109 | } | |
0bb7724a | 4110 | |
72453c8c MD |
4111 | /* This testpoint is after we signal readiness to the parent. */ |
4112 | if (testpoint(sessiond_thread_manage_clients)) { | |
4113 | goto error; | |
4114 | } | |
4115 | ||
e547b070 | 4116 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
4117 | goto error; |
4118 | } | |
8ac94142 | 4119 | |
840cb59c | 4120 | health_code_update(); |
44a5e5eb | 4121 | |
1d4b027a | 4122 | while (1) { |
1d4b027a | 4123 | DBG("Accepting client command ..."); |
273ea72c DG |
4124 | |
4125 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 4126 | restart: |
a78af745 | 4127 | health_poll_entry(); |
5eb91c98 | 4128 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 4129 | health_poll_exit(); |
273ea72c | 4130 | if (ret < 0) { |
88f2b785 MD |
4131 | /* |
4132 | * Restart interrupted system call. | |
4133 | */ | |
4134 | if (errno == EINTR) { | |
4135 | goto restart; | |
4136 | } | |
273ea72c DG |
4137 | goto error; |
4138 | } | |
4139 | ||
0d9c5d77 DG |
4140 | nb_fd = ret; |
4141 | ||
5eb91c98 DG |
4142 | for (i = 0; i < nb_fd; i++) { |
4143 | /* Fetch once the poll data */ | |
4144 | revents = LTTNG_POLL_GETEV(&events, i); | |
4145 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4146 | ||
840cb59c | 4147 | health_code_update(); |
44a5e5eb | 4148 | |
fd20dac9 MD |
4149 | if (!revents) { |
4150 | /* No activity for this FD (poll implementation). */ | |
4151 | continue; | |
4152 | } | |
4153 | ||
5eb91c98 | 4154 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4155 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 4156 | if (ret) { |
139ac872 MD |
4157 | err = 0; |
4158 | goto exit; | |
5eb91c98 DG |
4159 | } |
4160 | ||
4161 | /* Event on the registration socket */ | |
4162 | if (pollfd == client_sock) { | |
4163 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
4164 | ERR("Client socket poll error"); | |
4165 | goto error; | |
4166 | } | |
4167 | } | |
4168 | } | |
4169 | ||
4170 | DBG("Wait for client response"); | |
4171 | ||
840cb59c | 4172 | health_code_update(); |
44a5e5eb | 4173 | |
5eb91c98 DG |
4174 | sock = lttcomm_accept_unix_sock(client_sock); |
4175 | if (sock < 0) { | |
273ea72c | 4176 | goto error; |
273ea72c DG |
4177 | } |
4178 | ||
b662582b DG |
4179 | /* |
4180 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4181 | * show must go on. | |
4182 | */ | |
4183 | (void) utils_set_fd_cloexec(sock); | |
4184 | ||
be040666 DG |
4185 | /* Set socket option for credentials retrieval */ |
4186 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
4187 | if (ret < 0) { | |
4188 | goto error; | |
4189 | } | |
4190 | ||
5eb91c98 | 4191 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 4192 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 4193 | if (cmd_ctx == NULL) { |
76d7553f | 4194 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 4195 | goto error; |
5eb91c98 | 4196 | } |
1d4b027a | 4197 | |
5eb91c98 | 4198 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 4199 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 4200 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 4201 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
4202 | goto error; |
4203 | } | |
1d4b027a | 4204 | |
5eb91c98 DG |
4205 | cmd_ctx->llm = NULL; |
4206 | cmd_ctx->session = NULL; | |
1d4b027a | 4207 | |
840cb59c | 4208 | health_code_update(); |
44a5e5eb | 4209 | |
5eb91c98 DG |
4210 | /* |
4211 | * Data is received from the lttng client. The struct | |
4212 | * lttcomm_session_msg (lsm) contains the command and data request of | |
4213 | * the client. | |
4214 | */ | |
4215 | DBG("Receiving data from client ..."); | |
be040666 DG |
4216 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
4217 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
4218 | if (ret <= 0) { |
4219 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
4220 | ret = close(sock); |
4221 | if (ret) { | |
4222 | PERROR("close"); | |
4223 | } | |
4224 | sock = -1; | |
a2c0da86 | 4225 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4226 | continue; |
4227 | } | |
1d4b027a | 4228 | |
840cb59c | 4229 | health_code_update(); |
44a5e5eb | 4230 | |
5eb91c98 DG |
4231 | // TODO: Validate cmd_ctx including sanity check for |
4232 | // security purpose. | |
f7776ea7 | 4233 | |
f6a9efaa | 4234 | rcu_thread_online(); |
5eb91c98 DG |
4235 | /* |
4236 | * This function dispatch the work to the kernel or userspace tracer | |
4237 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
4238 | * informations for the client. The command context struct contains | |
4239 | * everything this function may needs. | |
4240 | */ | |
53a80697 | 4241 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 4242 | rcu_thread_offline(); |
5eb91c98 | 4243 | if (ret < 0) { |
36134aa1 DG |
4244 | ret = close(sock); |
4245 | if (ret) { | |
4246 | PERROR("close"); | |
53a80697 | 4247 | } |
36134aa1 | 4248 | sock = -1; |
bbd973c2 | 4249 | /* |
5eb91c98 | 4250 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 4251 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
4252 | * (ENOMEM). Error detected but still accept |
4253 | * command, unless a socket error has been | |
4254 | * detected. | |
bbd973c2 | 4255 | */ |
bbd973c2 | 4256 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4257 | continue; |
4258 | } | |
d6e4fca4 | 4259 | |
840cb59c | 4260 | health_code_update(); |
44a5e5eb | 4261 | |
54d01ffb DG |
4262 | DBG("Sending response (size: %d, retcode: %s)", |
4263 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 4264 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 4265 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
4266 | if (ret < 0) { |
4267 | ERR("Failed to send data back to client"); | |
bbd973c2 | 4268 | } |
1d4b027a | 4269 | |
5eb91c98 | 4270 | /* End of transmission */ |
76d7553f MD |
4271 | ret = close(sock); |
4272 | if (ret) { | |
4273 | PERROR("close"); | |
4274 | } | |
4275 | sock = -1; | |
be040666 DG |
4276 | |
4277 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 4278 | |
840cb59c | 4279 | health_code_update(); |
273ea72c DG |
4280 | } |
4281 | ||
139ac872 | 4282 | exit: |
5eb91c98 | 4283 | error: |
35df2755 CB |
4284 | if (sock >= 0) { |
4285 | ret = close(sock); | |
4286 | if (ret) { | |
4287 | PERROR("close"); | |
4288 | } | |
139ac872 | 4289 | } |
44a5e5eb | 4290 | |
35df2755 CB |
4291 | lttng_poll_clean(&events); |
4292 | clean_command_ctx(&cmd_ctx); | |
4293 | ||
4294 | error_listen: | |
4295 | error_create_poll: | |
273ea72c | 4296 | unlink(client_unix_sock_path); |
76d7553f MD |
4297 | if (client_sock >= 0) { |
4298 | ret = close(client_sock); | |
4299 | if (ret) { | |
4300 | PERROR("close"); | |
4301 | } | |
a4b35e07 | 4302 | } |
35df2755 CB |
4303 | |
4304 | if (err) { | |
840cb59c | 4305 | health_error(); |
35df2755 | 4306 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4307 | } |
273ea72c | 4308 | |
8782cc74 | 4309 | health_unregister(health_sessiond); |
35df2755 CB |
4310 | |
4311 | DBG("Client thread dying"); | |
f6a9efaa DG |
4312 | |
4313 | rcu_unregister_thread(); | |
4a15001e MD |
4314 | |
4315 | /* | |
4316 | * Since we are creating the consumer threads, we own them, so we need | |
4317 | * to join them before our thread exits. | |
4318 | */ | |
4319 | ret = join_consumer_thread(&kconsumer_data); | |
4320 | if (ret) { | |
4321 | errno = ret; | |
4322 | PERROR("join_consumer"); | |
4323 | } | |
4324 | ||
4325 | ret = join_consumer_thread(&ustconsumer32_data); | |
4326 | if (ret) { | |
4327 | errno = ret; | |
4328 | PERROR("join_consumer ust32"); | |
4329 | } | |
4330 | ||
4331 | ret = join_consumer_thread(&ustconsumer64_data); | |
4332 | if (ret) { | |
4333 | errno = ret; | |
4334 | PERROR("join_consumer ust64"); | |
4335 | } | |
1d4b027a DG |
4336 | return NULL; |
4337 | } | |
4338 | ||
4339 | ||
fac6795d DG |
4340 | /* |
4341 | * usage function on stderr | |
4342 | */ | |
4343 | static void usage(void) | |
4344 | { | |
b716ce68 | 4345 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
4346 | fprintf(stderr, " -h, --help Display this usage.\n"); |
4347 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
4348 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
4349 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
4350 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
4351 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
4352 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
4353 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
4354 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
4355 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
4356 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
4357 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
4358 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 | 4359 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
72dd7491 | 4360 | fprintf(stderr, " -b, --background Start as a daemon, keeping console open.\n"); |
d6f42150 DG |
4361 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); |
4362 | fprintf(stderr, " -V, --version Show version number.\n"); | |
7fe6d2c5 | 4363 | fprintf(stderr, " -S, --sig-parent Send SIGUSR1 to parent pid to notify readiness.\n"); |
d6f42150 DG |
4364 | fprintf(stderr, " -q, --quiet No output at all.\n"); |
4365 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
35f90c40 | 4366 | fprintf(stderr, " -p, --pidfile FILE Write a pid to FILE name overriding the default value.\n"); |
3bd1e081 | 4367 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 4368 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
1b2ef7fe | 4369 | fprintf(stderr, " --agent-tcp-port Agent registration TCP port\n"); |
76d01ebb | 4370 | fprintf(stderr, " -f --config PATH Load daemon configuration file\n"); |
ef367a93 | 4371 | fprintf(stderr, " -l --load PATH Load session configuration\n"); |
fbb9748b | 4372 | fprintf(stderr, " --kmod-probes Specify kernel module probes to load\n"); |
c9d42407 | 4373 | fprintf(stderr, " --extra-kmod-probes Specify extra kernel module probes to load\n"); |
fac6795d DG |
4374 | } |
4375 | ||
4376 | /* | |
26296c48 JG |
4377 | * Take an option from the getopt output and set it in the right variable to be |
4378 | * used later. | |
4379 | * | |
4380 | * Return 0 on success else a negative value. | |
fac6795d | 4381 | */ |
26296c48 | 4382 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4383 | { |
26296c48 | 4384 | int ret = 0; |
fac6795d | 4385 | |
c5d350b2 JG |
4386 | if (arg && arg[0] == '\0') { |
4387 | /* | |
4388 | * This only happens if the value is read from daemon config | |
4389 | * file. This means the option requires an argument and the | |
4390 | * configuration file contains a line such as: | |
4391 | * my_option = | |
4392 | */ | |
4393 | ret = -EINVAL; | |
4394 | goto end; | |
4395 | } | |
4396 | ||
26296c48 JG |
4397 | switch (opt) { |
4398 | case 0: | |
4399 | fprintf(stderr, "option %s", optname); | |
4400 | if (arg) { | |
4401 | fprintf(stderr, " with arg %s\n", arg); | |
fac6795d | 4402 | } |
26296c48 JG |
4403 | break; |
4404 | case 'c': | |
e8fa9fb0 MD |
4405 | if (lttng_is_setuid_setgid()) { |
4406 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4407 | "-c, --client-sock"); | |
4408 | } else { | |
4409 | snprintf(client_unix_sock_path, PATH_MAX, "%s", arg); | |
4410 | } | |
26296c48 JG |
4411 | break; |
4412 | case 'a': | |
e8fa9fb0 MD |
4413 | if (lttng_is_setuid_setgid()) { |
4414 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4415 | "-a, --apps-sock"); | |
4416 | } else { | |
4417 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", arg); | |
4418 | } | |
26296c48 JG |
4419 | break; |
4420 | case 'd': | |
4421 | opt_daemon = 1; | |
4422 | break; | |
72dd7491 MD |
4423 | case 'b': |
4424 | opt_background = 1; | |
4425 | break; | |
26296c48 | 4426 | case 'g': |
e8fa9fb0 MD |
4427 | if (lttng_is_setuid_setgid()) { |
4428 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4429 | "-g, --group"); | |
4430 | } else { | |
4431 | /* | |
4432 | * If the override option is set, the pointer points to a | |
4433 | * *non* const thus freeing it even though the variable type is | |
4434 | * set to const. | |
4435 | */ | |
4436 | if (tracing_group_name_override) { | |
4437 | free((void *) tracing_group_name); | |
4438 | } | |
4439 | tracing_group_name = strdup(arg); | |
4440 | if (!tracing_group_name) { | |
4441 | PERROR("strdup"); | |
4442 | ret = -ENOMEM; | |
4443 | } | |
4444 | tracing_group_name_override = 1; | |
db322c4d | 4445 | } |
26296c48 JG |
4446 | break; |
4447 | case 'h': | |
4448 | usage(); | |
4a15001e | 4449 | exit(EXIT_SUCCESS); |
26296c48 JG |
4450 | case 'V': |
4451 | fprintf(stdout, "%s\n", VERSION); | |
4452 | exit(EXIT_SUCCESS); | |
4453 | case 'S': | |
4454 | opt_sig_parent = 1; | |
4455 | break; | |
4456 | case 'E': | |
e8fa9fb0 MD |
4457 | if (lttng_is_setuid_setgid()) { |
4458 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4459 | "--kconsumerd-err-sock"); | |
4460 | } else { | |
4461 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4462 | } | |
26296c48 JG |
4463 | break; |
4464 | case 'C': | |
e8fa9fb0 MD |
4465 | if (lttng_is_setuid_setgid()) { |
4466 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4467 | "--kconsumerd-cmd-sock"); | |
4468 | } else { | |
4469 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4470 | } | |
26296c48 JG |
4471 | break; |
4472 | case 'F': | |
e8fa9fb0 MD |
4473 | if (lttng_is_setuid_setgid()) { |
4474 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4475 | "--ustconsumerd64-err-sock"); | |
4476 | } else { | |
4477 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4478 | } | |
26296c48 JG |
4479 | break; |
4480 | case 'D': | |
e8fa9fb0 MD |
4481 | if (lttng_is_setuid_setgid()) { |
4482 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4483 | "--ustconsumerd64-cmd-sock"); | |
4484 | } else { | |
4485 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4486 | } | |
26296c48 JG |
4487 | break; |
4488 | case 'H': | |
e8fa9fb0 MD |
4489 | if (lttng_is_setuid_setgid()) { |
4490 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4491 | "--ustconsumerd32-err-sock"); | |
4492 | } else { | |
4493 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4494 | } | |
26296c48 JG |
4495 | break; |
4496 | case 'G': | |
e8fa9fb0 MD |
4497 | if (lttng_is_setuid_setgid()) { |
4498 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4499 | "--ustconsumerd32-cmd-sock"); | |
4500 | } else { | |
4501 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4502 | } | |
26296c48 JG |
4503 | break; |
4504 | case 'N': | |
4505 | opt_no_kernel = 1; | |
4506 | break; | |
4507 | case 'q': | |
4508 | lttng_opt_quiet = 1; | |
4509 | break; | |
4510 | case 'v': | |
4511 | /* Verbose level can increase using multiple -v */ | |
4512 | if (arg) { | |
13755a18 | 4513 | /* Value obtained from config file */ |
26296c48 JG |
4514 | lttng_opt_verbose = config_parse_value(arg); |
4515 | } else { | |
13755a18 JG |
4516 | /* -v used on command line */ |
4517 | lttng_opt_verbose++; | |
26296c48 | 4518 | } |
13755a18 JG |
4519 | /* Clamp value to [0, 3] */ |
4520 | lttng_opt_verbose = lttng_opt_verbose < 0 ? 0 : | |
4521 | (lttng_opt_verbose <= 3 ? lttng_opt_verbose : 3); | |
26296c48 JG |
4522 | break; |
4523 | case 'Z': | |
4524 | if (arg) { | |
4525 | opt_verbose_consumer = config_parse_value(arg); | |
4526 | } else { | |
3bd1e081 | 4527 | opt_verbose_consumer += 1; |
26296c48 JG |
4528 | } |
4529 | break; | |
4530 | case 'u': | |
e8fa9fb0 MD |
4531 | if (lttng_is_setuid_setgid()) { |
4532 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4533 | "--consumerd32-path"); | |
4534 | } else { | |
4535 | if (consumerd32_bin_override) { | |
4536 | free((void *) consumerd32_bin); | |
4537 | } | |
4538 | consumerd32_bin = strdup(arg); | |
4539 | if (!consumerd32_bin) { | |
4540 | PERROR("strdup"); | |
4541 | ret = -ENOMEM; | |
4542 | } | |
4543 | consumerd32_bin_override = 1; | |
db322c4d | 4544 | } |
26296c48 JG |
4545 | break; |
4546 | case 'U': | |
e8fa9fb0 MD |
4547 | if (lttng_is_setuid_setgid()) { |
4548 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4549 | "--consumerd32-libdir"); | |
4550 | } else { | |
4551 | if (consumerd32_libdir_override) { | |
4552 | free((void *) consumerd32_libdir); | |
4553 | } | |
4554 | consumerd32_libdir = strdup(arg); | |
4555 | if (!consumerd32_libdir) { | |
4556 | PERROR("strdup"); | |
4557 | ret = -ENOMEM; | |
4558 | } | |
4559 | consumerd32_libdir_override = 1; | |
db322c4d | 4560 | } |
26296c48 JG |
4561 | break; |
4562 | case 't': | |
e8fa9fb0 MD |
4563 | if (lttng_is_setuid_setgid()) { |
4564 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4565 | "--consumerd64-path"); | |
4566 | } else { | |
4567 | if (consumerd64_bin_override) { | |
4568 | free((void *) consumerd64_bin); | |
4569 | } | |
4570 | consumerd64_bin = strdup(arg); | |
4571 | if (!consumerd64_bin) { | |
4572 | PERROR("strdup"); | |
4573 | ret = -ENOMEM; | |
4574 | } | |
4575 | consumerd64_bin_override = 1; | |
db322c4d | 4576 | } |
26296c48 JG |
4577 | break; |
4578 | case 'T': | |
e8fa9fb0 MD |
4579 | if (lttng_is_setuid_setgid()) { |
4580 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4581 | "--consumerd64-libdir"); | |
4582 | } else { | |
4583 | if (consumerd64_libdir_override) { | |
4584 | free((void *) consumerd64_libdir); | |
4585 | } | |
4586 | consumerd64_libdir = strdup(arg); | |
4587 | if (!consumerd64_libdir) { | |
4588 | PERROR("strdup"); | |
4589 | ret = -ENOMEM; | |
4590 | } | |
4591 | consumerd64_libdir_override = 1; | |
db322c4d | 4592 | } |
26296c48 JG |
4593 | break; |
4594 | case 'p': | |
e8fa9fb0 MD |
4595 | if (lttng_is_setuid_setgid()) { |
4596 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4597 | "-p, --pidfile"); | |
4598 | } else { | |
4599 | free(opt_pidfile); | |
4600 | opt_pidfile = strdup(arg); | |
4601 | if (!opt_pidfile) { | |
4602 | PERROR("strdup"); | |
4603 | ret = -ENOMEM; | |
4604 | } | |
db322c4d | 4605 | } |
26296c48 | 4606 | break; |
022d91ba | 4607 | case 'J': /* Agent TCP port. */ |
26296c48 | 4608 | { |
e8fa9fb0 MD |
4609 | if (lttng_is_setuid_setgid()) { |
4610 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4611 | "--agent-tcp-port"); | |
4612 | } else { | |
4613 | unsigned long v; | |
4d076222 | 4614 | |
e04aa23e JG |
4615 | if (!arg) { |
4616 | ret = -EINVAL; | |
4617 | goto end; | |
4618 | } | |
e8fa9fb0 MD |
4619 | errno = 0; |
4620 | v = strtoul(arg, NULL, 0); | |
4621 | if (errno != 0 || !isdigit(arg[0])) { | |
4622 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
4623 | return -1; | |
4624 | } | |
4625 | if (v == 0 || v >= 65535) { | |
4626 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
4627 | return -1; | |
4628 | } | |
4629 | agent_tcp_port = (uint32_t) v; | |
4630 | DBG3("Agent TCP port set to non default: %u", agent_tcp_port); | |
26296c48 | 4631 | } |
26296c48 JG |
4632 | break; |
4633 | } | |
ef367a93 | 4634 | case 'l': |
e8fa9fb0 MD |
4635 | if (lttng_is_setuid_setgid()) { |
4636 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4637 | "-l, --load"); | |
4638 | } else { | |
4639 | free(opt_load_session_path); | |
4640 | opt_load_session_path = strdup(arg); | |
4641 | if (!opt_load_session_path) { | |
4642 | PERROR("strdup"); | |
4643 | ret = -ENOMEM; | |
4644 | } | |
ef367a93 JG |
4645 | } |
4646 | break; | |
fbb9748b | 4647 | case 'P': /* probe modules list */ |
e8fa9fb0 MD |
4648 | if (lttng_is_setuid_setgid()) { |
4649 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4650 | "--kmod-probes"); | |
4651 | } else { | |
4652 | free(kmod_probes_list); | |
4653 | kmod_probes_list = strdup(arg); | |
4654 | if (!kmod_probes_list) { | |
4655 | PERROR("strdup"); | |
4656 | ret = -ENOMEM; | |
4657 | } | |
c9d42407 PP |
4658 | } |
4659 | break; | |
4660 | case 'e': | |
e8fa9fb0 MD |
4661 | if (lttng_is_setuid_setgid()) { |
4662 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4663 | "--extra-kmod-probes"); | |
4664 | } else { | |
4665 | free(kmod_extra_probes_list); | |
4666 | kmod_extra_probes_list = strdup(arg); | |
4667 | if (!kmod_extra_probes_list) { | |
4668 | PERROR("strdup"); | |
4669 | ret = -ENOMEM; | |
4670 | } | |
db322c4d | 4671 | } |
fbb9748b | 4672 | break; |
7ab02a27 DG |
4673 | case 'f': |
4674 | /* This is handled in set_options() thus silent break. */ | |
4675 | break; | |
26296c48 JG |
4676 | default: |
4677 | /* Unknown option or other error. | |
4678 | * Error is printed by getopt, just return */ | |
4679 | ret = -1; | |
4680 | } | |
4681 | ||
f3dd7ce7 | 4682 | end: |
c5d350b2 JG |
4683 | if (ret == -EINVAL) { |
4684 | const char *opt_name = "unknown"; | |
4685 | int i; | |
4686 | ||
4687 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
4688 | i++) { | |
4689 | if (opt == long_options[i].val) { | |
4690 | opt_name = long_options[i].name; | |
4691 | break; | |
4692 | } | |
4693 | } | |
4694 | ||
4695 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
4696 | opt_name); | |
4697 | } | |
f3dd7ce7 | 4698 | |
26296c48 JG |
4699 | return ret; |
4700 | } | |
4701 | ||
4702 | /* | |
4703 | * config_entry_handler_cb used to handle options read from a config file. | |
4704 | * See config_entry_handler_cb comment in common/config/config.h for the | |
4705 | * return value conventions. | |
4706 | */ | |
4707 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
4708 | { | |
4709 | int ret = 0, i; | |
4710 | ||
4711 | if (!entry || !entry->name || !entry->value) { | |
4712 | ret = -EINVAL; | |
4713 | goto end; | |
4714 | } | |
4715 | ||
4716 | /* Check if the option is to be ignored */ | |
4717 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
4718 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
4719 | goto end; | |
4720 | } | |
4721 | } | |
4722 | ||
4723 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
4724 | i++) { | |
4725 | ||
4726 | /* Ignore if not fully matched. */ | |
4727 | if (strcmp(entry->name, long_options[i].name)) { | |
4728 | continue; | |
4729 | } | |
4730 | ||
4731 | /* | |
4732 | * If the option takes no argument on the command line, we have to | |
4733 | * check if the value is "true". We support non-zero numeric values, | |
4734 | * true, on and yes. | |
4735 | */ | |
4736 | if (!long_options[i].has_arg) { | |
4737 | ret = config_parse_value(entry->value); | |
4738 | if (ret <= 0) { | |
4739 | if (ret) { | |
4740 | WARN("Invalid configuration value \"%s\" for option %s", | |
4741 | entry->value, entry->name); | |
4742 | } | |
4743 | /* False, skip boolean config option. */ | |
4744 | goto end; | |
4d076222 | 4745 | } |
26296c48 JG |
4746 | } |
4747 | ||
4748 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
4749 | goto end; | |
4750 | } | |
4751 | ||
4752 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
4753 | ||
4754 | end: | |
4755 | return ret; | |
4756 | } | |
4757 | ||
4758 | /* | |
4759 | * daemon configuration loading and argument parsing | |
4760 | */ | |
4761 | static int set_options(int argc, char **argv) | |
4762 | { | |
4763 | int ret = 0, c = 0, option_index = 0; | |
4764 | int orig_optopt = optopt, orig_optind = optind; | |
4765 | char *optstring; | |
4766 | const char *config_path = NULL; | |
4767 | ||
4768 | optstring = utils_generate_optstring(long_options, | |
4769 | sizeof(long_options) / sizeof(struct option)); | |
4770 | if (!optstring) { | |
4771 | ret = -ENOMEM; | |
4772 | goto end; | |
4773 | } | |
4774 | ||
4775 | /* Check for the --config option */ | |
4776 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
4777 | &option_index)) != -1) { | |
4778 | if (c == '?') { | |
4779 | ret = -EINVAL; | |
4780 | goto end; | |
4781 | } else if (c != 'f') { | |
4782 | /* if not equal to --config option. */ | |
4783 | continue; | |
4784 | } | |
4785 | ||
e8fa9fb0 MD |
4786 | if (lttng_is_setuid_setgid()) { |
4787 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4788 | "-f, --config"); | |
4789 | } else { | |
4790 | config_path = utils_expand_path(optarg); | |
4791 | if (!config_path) { | |
4792 | ERR("Failed to resolve path: %s", optarg); | |
4793 | } | |
26296c48 JG |
4794 | } |
4795 | } | |
4796 | ||
4797 | ret = config_get_section_entries(config_path, config_section_name, | |
4798 | config_entry_handler, NULL); | |
4799 | if (ret) { | |
4800 | if (ret > 0) { | |
4801 | ERR("Invalid configuration option at line %i", ret); | |
4802 | ret = -1; | |
4803 | } | |
4804 | goto end; | |
4805 | } | |
4806 | ||
4807 | /* Reset getopt's global state */ | |
4808 | optopt = orig_optopt; | |
4809 | optind = orig_optind; | |
4810 | while (1) { | |
4811 | c = getopt_long(argc, argv, optstring, long_options, &option_index); | |
4812 | if (c == -1) { | |
4d076222 DG |
4813 | break; |
4814 | } | |
26296c48 JG |
4815 | |
4816 | ret = set_option(c, optarg, long_options[option_index].name); | |
4817 | if (ret < 0) { | |
4818 | break; | |
fac6795d DG |
4819 | } |
4820 | } | |
4821 | ||
26296c48 JG |
4822 | end: |
4823 | free(optstring); | |
4824 | return ret; | |
fac6795d DG |
4825 | } |
4826 | ||
4827 | /* | |
d063d709 | 4828 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
4829 | * apps_sock - The communication socket for all UST apps. |
4830 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 4831 | */ |
cf3af59e | 4832 | static int init_daemon_socket(void) |
fac6795d DG |
4833 | { |
4834 | int ret = 0; | |
4835 | mode_t old_umask; | |
4836 | ||
4837 | old_umask = umask(0); | |
4838 | ||
4839 | /* Create client tool unix socket */ | |
d6f42150 DG |
4840 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
4841 | if (client_sock < 0) { | |
4842 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
4843 | ret = -1; |
4844 | goto end; | |
4845 | } | |
4846 | ||
b662582b DG |
4847 | /* Set the cloexec flag */ |
4848 | ret = utils_set_fd_cloexec(client_sock); | |
4849 | if (ret < 0) { | |
4850 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
4851 | "Continuing but note that the consumer daemon will have a " | |
4852 | "reference to this socket on exec()", client_sock); | |
4853 | } | |
4854 | ||
fac6795d DG |
4855 | /* File permission MUST be 660 */ |
4856 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4857 | if (ret < 0) { | |
d6f42150 | 4858 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 4859 | PERROR("chmod"); |
fac6795d DG |
4860 | goto end; |
4861 | } | |
4862 | ||
4863 | /* Create the application unix socket */ | |
d6f42150 DG |
4864 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
4865 | if (apps_sock < 0) { | |
4866 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
4867 | ret = -1; |
4868 | goto end; | |
4869 | } | |
4870 | ||
b662582b DG |
4871 | /* Set the cloexec flag */ |
4872 | ret = utils_set_fd_cloexec(apps_sock); | |
4873 | if (ret < 0) { | |
4874 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
4875 | "Continuing but note that the consumer daemon will have a " | |
4876 | "reference to this socket on exec()", apps_sock); | |
4877 | } | |
4878 | ||
d6f42150 | 4879 | /* File permission MUST be 666 */ |
54d01ffb DG |
4880 | ret = chmod(apps_unix_sock_path, |
4881 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 4882 | if (ret < 0) { |
d6f42150 | 4883 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 4884 | PERROR("chmod"); |
fac6795d DG |
4885 | goto end; |
4886 | } | |
4887 | ||
b662582b DG |
4888 | DBG3("Session daemon client socket %d and application socket %d created", |
4889 | client_sock, apps_sock); | |
4890 | ||
fac6795d DG |
4891 | end: |
4892 | umask(old_umask); | |
4893 | return ret; | |
4894 | } | |
4895 | ||
4896 | /* | |
54d01ffb DG |
4897 | * Check if the global socket is available, and if a daemon is answering at the |
4898 | * other side. If yes, error is returned. | |
fac6795d | 4899 | */ |
cf3af59e | 4900 | static int check_existing_daemon(void) |
fac6795d | 4901 | { |
7d8234d9 | 4902 | /* Is there anybody out there ? */ |
099e26bd | 4903 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 4904 | return -EEXIST; |
099e26bd | 4905 | } |
b09c7c76 DG |
4906 | |
4907 | return 0; | |
fac6795d DG |
4908 | } |
4909 | ||
fac6795d | 4910 | /* |
d063d709 | 4911 | * Set the tracing group gid onto the client socket. |
5e16da05 | 4912 | * |
d063d709 | 4913 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 4914 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 4915 | */ |
be040666 | 4916 | static int set_permissions(char *rundir) |
fac6795d DG |
4917 | { |
4918 | int ret; | |
996b65c8 | 4919 | gid_t gid; |
fac6795d | 4920 | |
6c71277b | 4921 | gid = utils_get_group_id(tracing_group_name); |
fac6795d | 4922 | |
d6f42150 | 4923 | /* Set lttng run dir */ |
be040666 | 4924 | ret = chown(rundir, 0, gid); |
d6f42150 | 4925 | if (ret < 0) { |
be040666 | 4926 | ERR("Unable to set group on %s", rundir); |
76d7553f | 4927 | PERROR("chown"); |
d6f42150 DG |
4928 | } |
4929 | ||
6c71277b MD |
4930 | /* |
4931 | * Ensure all applications and tracing group can search the run | |
4932 | * dir. Allow everyone to read the directory, since it does not | |
4933 | * buy us anything to hide its content. | |
4934 | */ | |
4935 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
4936 | if (ret < 0) { |
4937 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 4938 | PERROR("chmod"); |
d1613cf5 JN |
4939 | } |
4940 | ||
d6f42150 | 4941 | /* lttng client socket path */ |
996b65c8 | 4942 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 4943 | if (ret < 0) { |
d6f42150 | 4944 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 4945 | PERROR("chown"); |
d6f42150 DG |
4946 | } |
4947 | ||
3bd1e081 | 4948 | /* kconsumer error socket path */ |
6c71277b | 4949 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 4950 | if (ret < 0) { |
3bd1e081 | 4951 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 4952 | PERROR("chown"); |
3bd1e081 MD |
4953 | } |
4954 | ||
7753dea8 | 4955 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 4956 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
4957 | if (ret < 0) { |
4958 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 4959 | PERROR("chown"); |
7753dea8 MD |
4960 | } |
4961 | ||
4962 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 4963 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 4964 | if (ret < 0) { |
7753dea8 | 4965 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 4966 | PERROR("chown"); |
fac6795d DG |
4967 | } |
4968 | ||
d6f42150 | 4969 | DBG("All permissions are set"); |
e07ae692 | 4970 | |
fac6795d DG |
4971 | return ret; |
4972 | } | |
4973 | ||
d6f42150 | 4974 | /* |
d063d709 | 4975 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 4976 | */ |
67e40797 | 4977 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
4978 | { |
4979 | int ret; | |
4980 | ||
67e40797 DG |
4981 | DBG3("Creating LTTng run directory: %s", rundir); |
4982 | ||
d1613cf5 | 4983 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 4984 | if (ret < 0) { |
b1f11e69 | 4985 | if (errno != EEXIST) { |
67e40797 | 4986 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
4987 | goto error; |
4988 | } else { | |
4989 | ret = 0; | |
4990 | } | |
d6f42150 DG |
4991 | } |
4992 | ||
4993 | error: | |
4994 | return ret; | |
4995 | } | |
4996 | ||
4997 | /* | |
d063d709 DG |
4998 | * Setup sockets and directory needed by the kconsumerd communication with the |
4999 | * session daemon. | |
d6f42150 | 5000 | */ |
67e40797 DG |
5001 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
5002 | const char *rundir) | |
d6f42150 DG |
5003 | { |
5004 | int ret; | |
67e40797 | 5005 | char path[PATH_MAX]; |
d6f42150 | 5006 | |
6c71277b | 5007 | switch (consumer_data->type) { |
7753dea8 | 5008 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 5009 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
5010 | break; |
5011 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 5012 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
5013 | break; |
5014 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 5015 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
5016 | break; |
5017 | default: | |
5018 | ERR("Consumer type unknown"); | |
5019 | ret = -EINVAL; | |
5020 | goto error; | |
d6f42150 DG |
5021 | } |
5022 | ||
67e40797 DG |
5023 | DBG2("Creating consumer directory: %s", path); |
5024 | ||
6c71277b | 5025 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
d6f42150 | 5026 | if (ret < 0) { |
6beb2242 | 5027 | if (errno != EEXIST) { |
f11e84c2 | 5028 | PERROR("mkdir"); |
3bd1e081 | 5029 | ERR("Failed to create %s", path); |
6beb2242 DG |
5030 | goto error; |
5031 | } | |
f11e84c2 | 5032 | ret = -1; |
d6f42150 | 5033 | } |
6c71277b MD |
5034 | if (is_root) { |
5035 | ret = chown(path, 0, utils_get_group_id(tracing_group_name)); | |
5036 | if (ret < 0) { | |
5037 | ERR("Unable to set group on %s", path); | |
5038 | PERROR("chown"); | |
5039 | goto error; | |
5040 | } | |
5041 | } | |
d6f42150 DG |
5042 | |
5043 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
5044 | consumer_data->err_sock = |
5045 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
5046 | if (consumer_data->err_sock < 0) { | |
5047 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
5048 | ret = -1; |
5049 | goto error; | |
5050 | } | |
5051 | ||
a24f05ab MD |
5052 | /* |
5053 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
5054 | * show must go on. | |
5055 | */ | |
5056 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
5057 | if (ret < 0) { | |
5058 | PERROR("utils_set_fd_cloexec"); | |
5059 | /* continue anyway */ | |
5060 | } | |
5061 | ||
d6f42150 | 5062 | /* File permission MUST be 660 */ |
3bd1e081 | 5063 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 5064 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 5065 | if (ret < 0) { |
3bd1e081 | 5066 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 5067 | PERROR("chmod"); |
d6f42150 DG |
5068 | goto error; |
5069 | } | |
5070 | ||
5071 | error: | |
5072 | return ret; | |
5073 | } | |
5074 | ||
fac6795d | 5075 | /* |
d063d709 | 5076 | * Signal handler for the daemon |
cf3af59e | 5077 | * |
54d01ffb DG |
5078 | * Simply stop all worker threads, leaving main() return gracefully after |
5079 | * joining all threads and calling cleanup(). | |
fac6795d DG |
5080 | */ |
5081 | static void sighandler(int sig) | |
5082 | { | |
5083 | switch (sig) { | |
cf3af59e | 5084 | case SIGPIPE: |
af87c45a | 5085 | DBG("SIGPIPE caught"); |
cf3af59e MD |
5086 | return; |
5087 | case SIGINT: | |
af87c45a | 5088 | DBG("SIGINT caught"); |
cf3af59e MD |
5089 | stop_threads(); |
5090 | break; | |
5091 | case SIGTERM: | |
af87c45a | 5092 | DBG("SIGTERM caught"); |
cf3af59e MD |
5093 | stop_threads(); |
5094 | break; | |
0bb7724a DG |
5095 | case SIGUSR1: |
5096 | CMM_STORE_SHARED(recv_child_signal, 1); | |
5097 | break; | |
cf3af59e MD |
5098 | default: |
5099 | break; | |
fac6795d | 5100 | } |
fac6795d DG |
5101 | } |
5102 | ||
5103 | /* | |
d063d709 | 5104 | * Setup signal handler for : |
1d4b027a | 5105 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 5106 | */ |
1d4b027a | 5107 | static int set_signal_handler(void) |
fac6795d | 5108 | { |
1d4b027a DG |
5109 | int ret = 0; |
5110 | struct sigaction sa; | |
5111 | sigset_t sigset; | |
fac6795d | 5112 | |
1d4b027a | 5113 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 5114 | PERROR("sigemptyset"); |
1d4b027a DG |
5115 | return ret; |
5116 | } | |
d6f42150 | 5117 | |
1d4b027a DG |
5118 | sa.sa_handler = sighandler; |
5119 | sa.sa_mask = sigset; | |
5120 | sa.sa_flags = 0; | |
5121 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 5122 | PERROR("sigaction"); |
1d4b027a | 5123 | return ret; |
d6f42150 DG |
5124 | } |
5125 | ||
1d4b027a | 5126 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 5127 | PERROR("sigaction"); |
1d4b027a | 5128 | return ret; |
d6f42150 | 5129 | } |
aaf26714 | 5130 | |
1d4b027a | 5131 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 5132 | PERROR("sigaction"); |
1d4b027a | 5133 | return ret; |
8c0faa1d DG |
5134 | } |
5135 | ||
0bb7724a DG |
5136 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
5137 | PERROR("sigaction"); | |
5138 | return ret; | |
5139 | } | |
5140 | ||
5141 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
5142 | |
5143 | return ret; | |
fac6795d DG |
5144 | } |
5145 | ||
f3ed775e | 5146 | /* |
d063d709 DG |
5147 | * Set open files limit to unlimited. This daemon can open a large number of |
5148 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
5149 | */ |
5150 | static void set_ulimit(void) | |
5151 | { | |
5152 | int ret; | |
5153 | struct rlimit lim; | |
5154 | ||
a88df331 | 5155 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
5156 | lim.rlim_cur = 65535; |
5157 | lim.rlim_max = 65535; | |
5158 | ||
5159 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
5160 | if (ret < 0) { | |
76d7553f | 5161 | PERROR("failed to set open files limit"); |
f3ed775e DG |
5162 | } |
5163 | } | |
5164 | ||
35f90c40 DG |
5165 | /* |
5166 | * Write pidfile using the rundir and opt_pidfile. | |
5167 | */ | |
4a15001e | 5168 | static int write_pidfile(void) |
35f90c40 DG |
5169 | { |
5170 | int ret; | |
5171 | char pidfile_path[PATH_MAX]; | |
5172 | ||
5173 | assert(rundir); | |
5174 | ||
5175 | if (opt_pidfile) { | |
5176 | strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path)); | |
5177 | } else { | |
5178 | /* Build pidfile path from rundir and opt_pidfile. */ | |
5179 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
5180 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
5181 | if (ret < 0) { | |
5182 | PERROR("snprintf pidfile path"); | |
5183 | goto error; | |
5184 | } | |
5185 | } | |
5186 | ||
5187 | /* | |
4a15001e | 5188 | * Create pid file in rundir. |
35f90c40 | 5189 | */ |
4a15001e | 5190 | ret = utils_create_pid_file(getpid(), pidfile_path); |
35f90c40 | 5191 | error: |
4a15001e | 5192 | return ret; |
35f90c40 DG |
5193 | } |
5194 | ||
c9cb3e7d JG |
5195 | /* |
5196 | * Create lockfile using the rundir and return its fd. | |
5197 | */ | |
5198 | static int create_lockfile(void) | |
5199 | { | |
5200 | int ret; | |
5201 | char lockfile_path[PATH_MAX]; | |
5202 | ||
5203 | ret = generate_lock_file_path(lockfile_path, sizeof(lockfile_path)); | |
5204 | if (ret < 0) { | |
5205 | goto error; | |
5206 | } | |
5207 | ||
5208 | ret = utils_create_lock_file(lockfile_path); | |
5209 | error: | |
5210 | return ret; | |
5211 | } | |
5212 | ||
cd9290dd | 5213 | /* |
022d91ba | 5214 | * Write agent TCP port using the rundir. |
cd9290dd | 5215 | */ |
4a15001e | 5216 | static int write_agent_port(void) |
cd9290dd DG |
5217 | { |
5218 | int ret; | |
5219 | char path[PATH_MAX]; | |
5220 | ||
5221 | assert(rundir); | |
5222 | ||
5223 | ret = snprintf(path, sizeof(path), "%s/" | |
022d91ba | 5224 | DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE, rundir); |
cd9290dd | 5225 | if (ret < 0) { |
022d91ba | 5226 | PERROR("snprintf agent port path"); |
cd9290dd DG |
5227 | goto error; |
5228 | } | |
5229 | ||
5230 | /* | |
4a15001e | 5231 | * Create TCP agent port file in rundir. |
cd9290dd | 5232 | */ |
4a15001e | 5233 | ret = utils_create_pid_file(agent_tcp_port, path); |
cd9290dd DG |
5234 | |
5235 | error: | |
4a15001e | 5236 | return ret; |
ef367a93 JG |
5237 | } |
5238 | ||
fac6795d DG |
5239 | /* |
5240 | * main | |
5241 | */ | |
5242 | int main(int argc, char **argv) | |
5243 | { | |
4a15001e | 5244 | int ret = 0, retval = 0; |
fac6795d | 5245 | void *status; |
ae9e45b3 | 5246 | const char *home_path, *env_app_timeout; |
fac6795d | 5247 | |
335a95b7 MD |
5248 | init_kernel_workarounds(); |
5249 | ||
f6a9efaa DG |
5250 | rcu_register_thread(); |
5251 | ||
4a15001e MD |
5252 | if (set_signal_handler()) { |
5253 | retval = -1; | |
5254 | goto exit_set_signal_handler; | |
0bb7724a DG |
5255 | } |
5256 | ||
7753dea8 | 5257 | setup_consumerd_path(); |
fb09408a | 5258 | |
12744796 DG |
5259 | page_size = sysconf(_SC_PAGESIZE); |
5260 | if (page_size < 0) { | |
5261 | PERROR("sysconf _SC_PAGESIZE"); | |
5262 | page_size = LONG_MAX; | |
5263 | WARN("Fallback page size to %ld", page_size); | |
5264 | } | |
5265 | ||
4a15001e MD |
5266 | /* |
5267 | * Parse arguments and load the daemon configuration file. | |
5268 | * | |
5269 | * We have an exit_options exit path to free memory reserved by | |
5270 | * set_options. This is needed because the rest of sessiond_cleanup() | |
5271 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
5272 | * depends on set_options. | |
5273 | */ | |
fac6795d | 5274 | progname = argv[0]; |
4a15001e MD |
5275 | if (set_options(argc, argv)) { |
5276 | retval = -1; | |
5277 | goto exit_options; | |
fac6795d DG |
5278 | } |
5279 | ||
5280 | /* Daemonize */ | |
72dd7491 | 5281 | if (opt_daemon || opt_background) { |
ceed52b5 MD |
5282 | int i; |
5283 | ||
72dd7491 MD |
5284 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
5285 | !opt_background); | |
53094c05 | 5286 | if (ret < 0) { |
4a15001e MD |
5287 | retval = -1; |
5288 | goto exit_options; | |
53094c05 | 5289 | } |
0bb7724a | 5290 | |
ceed52b5 | 5291 | /* |
0bb7724a | 5292 | * We are in the child. Make sure all other file descriptors are |
4a15001e MD |
5293 | * closed, in case we are called with more opened file |
5294 | * descriptors than the standard ones. | |
ceed52b5 MD |
5295 | */ |
5296 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
5297 | (void) close(i); | |
5298 | } | |
5299 | } | |
5300 | ||
4a15001e MD |
5301 | /* |
5302 | * Starting from here, we can create threads. This needs to be after | |
5303 | * lttng_daemonize due to RCU. | |
5304 | */ | |
5305 | ||
5306 | /* | |
5307 | * Initialize the health check subsystem. This call should set the | |
5308 | * appropriate time values. | |
5309 | */ | |
5310 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
5311 | if (!health_sessiond) { | |
5312 | PERROR("health_app_create error"); | |
5313 | retval = -1; | |
5314 | goto exit_health_sessiond_cleanup; | |
5315 | } | |
5316 | ||
5317 | if (init_ht_cleanup_quit_pipe()) { | |
5318 | retval = -1; | |
5319 | goto exit_ht_cleanup_quit_pipe; | |
5320 | } | |
5321 | ||
5322 | /* Setup the thread ht_cleanup communication pipe. */ | |
5323 | if (utils_create_pipe_cloexec(ht_cleanup_pipe)) { | |
5324 | retval = -1; | |
5325 | goto exit_ht_cleanup_pipe; | |
5326 | } | |
5327 | ||
25b397f9 MD |
5328 | /* Set up max poll set size */ |
5329 | if (lttng_poll_set_max_size()) { | |
5330 | retval = -1; | |
5331 | goto exit_set_max_size; | |
5332 | } | |
5333 | ||
4a15001e MD |
5334 | /* Create thread to clean up RCU hash tables */ |
5335 | ret = pthread_create(&ht_cleanup_thread, NULL, | |
5336 | thread_ht_cleanup, (void *) NULL); | |
5337 | if (ret) { | |
5338 | errno = ret; | |
5339 | PERROR("pthread_create ht_cleanup"); | |
5340 | retval = -1; | |
5341 | goto exit_ht_cleanup; | |
5342 | } | |
5343 | ||
ceed52b5 | 5344 | /* Create thread quit pipe */ |
4a15001e MD |
5345 | if (init_thread_quit_pipe()) { |
5346 | retval = -1; | |
5347 | goto exit_init_data; | |
fac6795d DG |
5348 | } |
5349 | ||
5350 | /* Check if daemon is UID = 0 */ | |
5351 | is_root = !getuid(); | |
5352 | ||
fac6795d | 5353 | if (is_root) { |
990570ed | 5354 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
4ea184d1 | 5355 | if (!rundir) { |
4a15001e MD |
5356 | retval = -1; |
5357 | goto exit_init_data; | |
4ea184d1 | 5358 | } |
67e40797 DG |
5359 | |
5360 | /* Create global run dir with root access */ | |
4a15001e MD |
5361 | if (create_lttng_rundir(rundir)) { |
5362 | retval = -1; | |
5363 | goto exit_init_data; | |
d6f42150 DG |
5364 | } |
5365 | ||
fac6795d | 5366 | if (strlen(apps_unix_sock_path) == 0) { |
4a15001e | 5367 | ret = snprintf(apps_unix_sock_path, PATH_MAX, |
d6f42150 | 5368 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); |
4a15001e MD |
5369 | if (ret < 0) { |
5370 | retval = -1; | |
5371 | goto exit_init_data; | |
5372 | } | |
fac6795d DG |
5373 | } |
5374 | ||
5375 | if (strlen(client_unix_sock_path) == 0) { | |
4a15001e | 5376 | ret = snprintf(client_unix_sock_path, PATH_MAX, |
d6f42150 | 5377 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); |
4a15001e MD |
5378 | if (ret < 0) { |
5379 | retval = -1; | |
5380 | goto exit_init_data; | |
5381 | } | |
d6f42150 | 5382 | } |
0fdd1e2c DG |
5383 | |
5384 | /* Set global SHM for ust */ | |
5385 | if (strlen(wait_shm_path) == 0) { | |
4a15001e | 5386 | ret = snprintf(wait_shm_path, PATH_MAX, |
0fdd1e2c | 5387 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); |
4a15001e MD |
5388 | if (ret < 0) { |
5389 | retval = -1; | |
5390 | goto exit_init_data; | |
5391 | } | |
0fdd1e2c | 5392 | } |
67e40797 | 5393 | |
44a5e5eb | 5394 | if (strlen(health_unix_sock_path) == 0) { |
4a15001e MD |
5395 | ret = snprintf(health_unix_sock_path, |
5396 | sizeof(health_unix_sock_path), | |
44a5e5eb | 5397 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); |
4a15001e MD |
5398 | if (ret < 0) { |
5399 | retval = -1; | |
5400 | goto exit_init_data; | |
5401 | } | |
44a5e5eb DG |
5402 | } |
5403 | ||
67e40797 | 5404 | /* Setup kernel consumerd path */ |
4a15001e | 5405 | ret = snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5406 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5407 | if (ret < 0) { |
5408 | retval = -1; | |
5409 | goto exit_init_data; | |
5410 | } | |
5411 | ret = snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5412 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5413 | if (ret < 0) { |
5414 | retval = -1; | |
5415 | goto exit_init_data; | |
5416 | } | |
67e40797 DG |
5417 | |
5418 | DBG2("Kernel consumer err path: %s", | |
5419 | kconsumer_data.err_unix_sock_path); | |
5420 | DBG2("Kernel consumer cmd path: %s", | |
5421 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 5422 | } else { |
feb0f3e5 | 5423 | home_path = utils_get_home_dir(); |
b082db07 | 5424 | if (home_path == NULL) { |
273ea72c DG |
5425 | /* TODO: Add --socket PATH option */ |
5426 | ERR("Can't get HOME directory for sockets creation."); | |
4a15001e MD |
5427 | retval = -1; |
5428 | goto exit_init_data; | |
b082db07 DG |
5429 | } |
5430 | ||
67e40797 DG |
5431 | /* |
5432 | * Create rundir from home path. This will create something like | |
5433 | * $HOME/.lttng | |
5434 | */ | |
990570ed | 5435 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 | 5436 | if (ret < 0) { |
4a15001e MD |
5437 | retval = -1; |
5438 | goto exit_init_data; | |
67e40797 DG |
5439 | } |
5440 | ||
4a15001e MD |
5441 | if (create_lttng_rundir(rundir)) { |
5442 | retval = -1; | |
5443 | goto exit_init_data; | |
67e40797 DG |
5444 | } |
5445 | ||
fac6795d | 5446 | if (strlen(apps_unix_sock_path) == 0) { |
4a15001e MD |
5447 | ret = snprintf(apps_unix_sock_path, PATH_MAX, |
5448 | DEFAULT_HOME_APPS_UNIX_SOCK, | |
5449 | home_path); | |
5450 | if (ret < 0) { | |
5451 | retval = -1; | |
5452 | goto exit_init_data; | |
5453 | } | |
fac6795d DG |
5454 | } |
5455 | ||
5456 | /* Set the cli tool unix socket path */ | |
5457 | if (strlen(client_unix_sock_path) == 0) { | |
4a15001e MD |
5458 | ret = snprintf(client_unix_sock_path, PATH_MAX, |
5459 | DEFAULT_HOME_CLIENT_UNIX_SOCK, | |
5460 | home_path); | |
5461 | if (ret < 0) { | |
5462 | retval = -1; | |
5463 | goto exit_init_data; | |
5464 | } | |
fac6795d | 5465 | } |
0fdd1e2c DG |
5466 | |
5467 | /* Set global SHM for ust */ | |
5468 | if (strlen(wait_shm_path) == 0) { | |
4a15001e MD |
5469 | ret = snprintf(wait_shm_path, PATH_MAX, |
5470 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, | |
5471 | getuid()); | |
5472 | if (ret < 0) { | |
5473 | retval = -1; | |
5474 | goto exit_init_data; | |
5475 | } | |
0fdd1e2c | 5476 | } |
44a5e5eb DG |
5477 | |
5478 | /* Set health check Unix path */ | |
5479 | if (strlen(health_unix_sock_path) == 0) { | |
4a15001e MD |
5480 | ret = snprintf(health_unix_sock_path, |
5481 | sizeof(health_unix_sock_path), | |
5482 | DEFAULT_HOME_HEALTH_UNIX_SOCK, | |
5483 | home_path); | |
5484 | if (ret < 0) { | |
5485 | retval = -1; | |
5486 | goto exit_init_data; | |
5487 | } | |
44a5e5eb | 5488 | } |
fac6795d DG |
5489 | } |
5490 | ||
c9cb3e7d JG |
5491 | lockfile_fd = create_lockfile(); |
5492 | if (lockfile_fd < 0) { | |
4a15001e MD |
5493 | retval = -1; |
5494 | goto exit_init_data; | |
c9cb3e7d JG |
5495 | } |
5496 | ||
5c827ce0 DG |
5497 | /* Set consumer initial state */ |
5498 | kernel_consumerd_state = CONSUMER_STOPPED; | |
5499 | ust_consumerd_state = CONSUMER_STOPPED; | |
5500 | ||
847177cd DG |
5501 | DBG("Client socket path %s", client_unix_sock_path); |
5502 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 5503 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
5504 | DBG("LTTng run directory path: %s", rundir); |
5505 | ||
5506 | /* 32 bits consumerd path setup */ | |
4a15001e | 5507 | ret = snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5508 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5509 | if (ret < 0) { |
5510 | PERROR("snprintf 32-bit consumer error socket path"); | |
5511 | retval = -1; | |
5512 | goto exit_init_data; | |
5513 | } | |
5514 | ret = snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5515 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5516 | if (ret < 0) { |
5517 | PERROR("snprintf 32-bit consumer command socket path"); | |
5518 | retval = -1; | |
5519 | goto exit_init_data; | |
5520 | } | |
67e40797 DG |
5521 | |
5522 | DBG2("UST consumer 32 bits err path: %s", | |
5523 | ustconsumer32_data.err_unix_sock_path); | |
5524 | DBG2("UST consumer 32 bits cmd path: %s", | |
5525 | ustconsumer32_data.cmd_unix_sock_path); | |
5526 | ||
5527 | /* 64 bits consumerd path setup */ | |
4a15001e | 5528 | ret = snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, |
60922cb0 | 5529 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
4a15001e MD |
5530 | if (ret < 0) { |
5531 | PERROR("snprintf 64-bit consumer error socket path"); | |
5532 | retval = -1; | |
5533 | goto exit_init_data; | |
5534 | } | |
5535 | ret = snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, | |
60922cb0 | 5536 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
4a15001e MD |
5537 | if (ret < 0) { |
5538 | PERROR("snprintf 64-bit consumer command socket path"); | |
5539 | retval = -1; | |
5540 | goto exit_init_data; | |
5541 | } | |
67e40797 DG |
5542 | |
5543 | DBG2("UST consumer 64 bits err path: %s", | |
5544 | ustconsumer64_data.err_unix_sock_path); | |
5545 | DBG2("UST consumer 64 bits cmd path: %s", | |
5546 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 5547 | |
273ea72c | 5548 | /* |
7d8234d9 | 5549 | * See if daemon already exist. |
fac6795d | 5550 | */ |
4a15001e | 5551 | if (check_existing_daemon()) { |
75462a81 | 5552 | ERR("Already running daemon.\n"); |
273ea72c | 5553 | /* |
cf3af59e MD |
5554 | * We do not goto exit because we must not cleanup() |
5555 | * because a daemon is already running. | |
ab118b20 | 5556 | */ |
4a15001e MD |
5557 | retval = -1; |
5558 | goto exit_init_data; | |
a88df331 DG |
5559 | } |
5560 | ||
1427f9b2 DG |
5561 | /* |
5562 | * Init UST app hash table. Alloc hash table before this point since | |
5563 | * cleanup() can get called after that point. | |
5564 | */ | |
4a15001e MD |
5565 | if (ust_app_ht_alloc()) { |
5566 | retval = -1; | |
5567 | goto exit_init_data; | |
5568 | } | |
1427f9b2 | 5569 | |
022d91ba | 5570 | /* Initialize agent domain subsystem. */ |
4a15001e | 5571 | if (agent_setup()) { |
f20baf8e | 5572 | /* ENOMEM at this point. */ |
4a15001e MD |
5573 | retval = -1; |
5574 | goto exit_init_data; | |
f20baf8e DG |
5575 | } |
5576 | ||
a88df331 DG |
5577 | /* |
5578 | * These actions must be executed as root. We do that *after* setting up | |
5579 | * the sockets path because we MUST make the check for another daemon using | |
5580 | * those paths *before* trying to set the kernel consumer sockets and init | |
5581 | * kernel tracer. | |
5582 | */ | |
5583 | if (is_root) { | |
4a15001e MD |
5584 | if (set_consumer_sockets(&kconsumer_data, rundir)) { |
5585 | retval = -1; | |
5586 | goto exit_init_data; | |
7753dea8 MD |
5587 | } |
5588 | ||
a88df331 | 5589 | /* Setup kernel tracer */ |
4fba7219 DG |
5590 | if (!opt_no_kernel) { |
5591 | init_kernel_tracer(); | |
89588270 DG |
5592 | if (kernel_tracer_fd >= 0) { |
5593 | ret = syscall_init_table(); | |
5594 | if (ret < 0) { | |
4a15001e MD |
5595 | ERR("Unable to populate syscall table. " |
5596 | "Syscall tracing won't work " | |
5597 | "for this session daemon."); | |
89588270 | 5598 | } |
834978fd | 5599 | } |
4fba7219 | 5600 | } |
a88df331 DG |
5601 | |
5602 | /* Set ulimit for open files */ | |
5603 | set_ulimit(); | |
fac6795d | 5604 | } |
4063050c MD |
5605 | /* init lttng_fd tracking must be done after set_ulimit. */ |
5606 | lttng_fd_init(); | |
fac6795d | 5607 | |
4a15001e MD |
5608 | if (set_consumer_sockets(&ustconsumer64_data, rundir)) { |
5609 | retval = -1; | |
5610 | goto exit_init_data; | |
67e40797 DG |
5611 | } |
5612 | ||
4a15001e MD |
5613 | if (set_consumer_sockets(&ustconsumer32_data, rundir)) { |
5614 | retval = -1; | |
5615 | goto exit_init_data; | |
67e40797 DG |
5616 | } |
5617 | ||
d6f42150 | 5618 | /* Setup the needed unix socket */ |
4a15001e MD |
5619 | if (init_daemon_socket()) { |
5620 | retval = -1; | |
5621 | goto exit_init_data; | |
fac6795d DG |
5622 | } |
5623 | ||
5624 | /* Set credentials to socket */ | |
4a15001e MD |
5625 | if (is_root && set_permissions(rundir)) { |
5626 | retval = -1; | |
5627 | goto exit_init_data; | |
fac6795d DG |
5628 | } |
5629 | ||
5b8719f5 DG |
5630 | /* Get parent pid if -S, --sig-parent is specified. */ |
5631 | if (opt_sig_parent) { | |
5632 | ppid = getppid(); | |
5633 | } | |
5634 | ||
7a485870 | 5635 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 | 5636 | if (is_root && !opt_no_kernel) { |
4a15001e MD |
5637 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
5638 | retval = -1; | |
5639 | goto exit_init_data; | |
6620da75 | 5640 | } |
7a485870 DG |
5641 | } |
5642 | ||
099e26bd | 5643 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
5644 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
5645 | retval = -1; | |
5646 | goto exit_init_data; | |
099e26bd DG |
5647 | } |
5648 | ||
d0b96690 | 5649 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
5650 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
5651 | retval = -1; | |
5652 | goto exit_init_data; | |
d0b96690 DG |
5653 | } |
5654 | ||
7972aab2 DG |
5655 | /* Initialize global buffer per UID and PID registry. */ |
5656 | buffer_reg_init_uid_registry(); | |
5657 | buffer_reg_init_pid_registry(); | |
5658 | ||
099e26bd | 5659 | /* Init UST command queue. */ |
8bdee6e2 | 5660 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 5661 | |
273ea72c | 5662 | /* |
4a15001e MD |
5663 | * Get session list pointer. This pointer MUST NOT be free'd. This list |
5664 | * is statically declared in session.c | |
273ea72c | 5665 | */ |
54d01ffb | 5666 | session_list_ptr = session_get_list(); |
b5541356 | 5667 | |
2f77fc4b | 5668 | cmd_init(); |
00e2e675 | 5669 | |
ae9e45b3 DG |
5670 | /* Check for the application socket timeout env variable. */ |
5671 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
5672 | if (env_app_timeout) { | |
5673 | app_socket_timeout = atoi(env_app_timeout); | |
5674 | } else { | |
5675 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
5676 | } | |
5677 | ||
4a15001e MD |
5678 | ret = write_pidfile(); |
5679 | if (ret) { | |
5680 | ERR("Error in write_pidfile"); | |
5681 | retval = -1; | |
5682 | goto exit_init_data; | |
5683 | } | |
5684 | ret = write_agent_port(); | |
5685 | if (ret) { | |
5686 | ERR("Error in write_agent_port"); | |
5687 | retval = -1; | |
5688 | goto exit_init_data; | |
5689 | } | |
35f90c40 | 5690 | |
554831e7 MD |
5691 | /* Initialize communication library */ |
5692 | lttcomm_init(); | |
4a15001e | 5693 | /* Initialize TCP timeout values */ |
d831c249 | 5694 | lttcomm_inet_init(); |
554831e7 | 5695 | |
ef367a93 | 5696 | if (load_session_init_data(&load_info) < 0) { |
4a15001e MD |
5697 | retval = -1; |
5698 | goto exit_init_data; | |
ef367a93 JG |
5699 | } |
5700 | load_info->path = opt_load_session_path; | |
5701 | ||
d5b9fd2f | 5702 | /* Create health-check thread */ |
44a5e5eb DG |
5703 | ret = pthread_create(&health_thread, NULL, |
5704 | thread_manage_health, (void *) NULL); | |
4a15001e MD |
5705 | if (ret) { |
5706 | errno = ret; | |
44a5e5eb | 5707 | PERROR("pthread_create health"); |
4a15001e | 5708 | retval = -1; |
44a5e5eb DG |
5709 | goto exit_health; |
5710 | } | |
5711 | ||
cf3af59e | 5712 | /* Create thread to manage the client socket */ |
099e26bd DG |
5713 | ret = pthread_create(&client_thread, NULL, |
5714 | thread_manage_clients, (void *) NULL); | |
4a15001e MD |
5715 | if (ret) { |
5716 | errno = ret; | |
76d7553f | 5717 | PERROR("pthread_create clients"); |
4a15001e | 5718 | retval = -1; |
cf3af59e MD |
5719 | goto exit_client; |
5720 | } | |
fac6795d | 5721 | |
099e26bd DG |
5722 | /* Create thread to dispatch registration */ |
5723 | ret = pthread_create(&dispatch_thread, NULL, | |
5724 | thread_dispatch_ust_registration, (void *) NULL); | |
4a15001e MD |
5725 | if (ret) { |
5726 | errno = ret; | |
76d7553f | 5727 | PERROR("pthread_create dispatch"); |
4a15001e | 5728 | retval = -1; |
099e26bd DG |
5729 | goto exit_dispatch; |
5730 | } | |
5731 | ||
5732 | /* Create thread to manage application registration. */ | |
5733 | ret = pthread_create(®_apps_thread, NULL, | |
5734 | thread_registration_apps, (void *) NULL); | |
4a15001e MD |
5735 | if (ret) { |
5736 | errno = ret; | |
76d7553f | 5737 | PERROR("pthread_create registration"); |
4a15001e | 5738 | retval = -1; |
099e26bd DG |
5739 | goto exit_reg_apps; |
5740 | } | |
5741 | ||
cf3af59e | 5742 | /* Create thread to manage application socket */ |
54d01ffb DG |
5743 | ret = pthread_create(&apps_thread, NULL, |
5744 | thread_manage_apps, (void *) NULL); | |
4a15001e MD |
5745 | if (ret) { |
5746 | errno = ret; | |
d0b96690 | 5747 | PERROR("pthread_create apps"); |
4a15001e | 5748 | retval = -1; |
d0b96690 DG |
5749 | goto exit_apps; |
5750 | } | |
5751 | ||
5752 | /* Create thread to manage application notify socket */ | |
5753 | ret = pthread_create(&apps_notify_thread, NULL, | |
5754 | ust_thread_manage_notify, (void *) NULL); | |
4a15001e MD |
5755 | if (ret) { |
5756 | errno = ret; | |
f5c32ef1 | 5757 | PERROR("pthread_create notify"); |
4a15001e | 5758 | retval = -1; |
9563b0ad | 5759 | goto exit_apps_notify; |
cf3af59e | 5760 | } |
fac6795d | 5761 | |
022d91ba DG |
5762 | /* Create agent registration thread. */ |
5763 | ret = pthread_create(&agent_reg_thread, NULL, | |
5764 | agent_thread_manage_registration, (void *) NULL); | |
4a15001e MD |
5765 | if (ret) { |
5766 | errno = ret; | |
022d91ba | 5767 | PERROR("pthread_create agent"); |
4a15001e | 5768 | retval = -1; |
022d91ba | 5769 | goto exit_agent_reg; |
4d076222 DG |
5770 | } |
5771 | ||
6620da75 DG |
5772 | /* Don't start this thread if kernel tracing is not requested nor root */ |
5773 | if (is_root && !opt_no_kernel) { | |
5774 | /* Create kernel thread to manage kernel event */ | |
5775 | ret = pthread_create(&kernel_thread, NULL, | |
5776 | thread_manage_kernel, (void *) NULL); | |
4a15001e MD |
5777 | if (ret) { |
5778 | errno = ret; | |
6620da75 | 5779 | PERROR("pthread_create kernel"); |
4a15001e | 5780 | retval = -1; |
6620da75 DG |
5781 | goto exit_kernel; |
5782 | } | |
ef367a93 | 5783 | } |
7a485870 | 5784 | |
4a15001e MD |
5785 | /* Create session loading thread. */ |
5786 | ret = pthread_create(&load_session_thread, NULL, thread_load_session, | |
5787 | load_info); | |
5788 | if (ret) { | |
5789 | errno = ret; | |
5790 | PERROR("pthread_create load_session_thread"); | |
5791 | retval = -1; | |
5792 | goto exit_load_session; | |
5793 | } | |
5794 | ||
5795 | /* | |
5796 | * This is where we start awaiting program completion (e.g. through | |
5797 | * signal that asks threads to teardown). | |
5798 | */ | |
5799 | ||
5800 | ret = pthread_join(load_session_thread, &status); | |
5801 | if (ret) { | |
5802 | errno = ret; | |
5803 | PERROR("pthread_join load_session_thread"); | |
5804 | retval = -1; | |
5805 | } | |
5806 | exit_load_session: | |
ef367a93 JG |
5807 | |
5808 | if (is_root && !opt_no_kernel) { | |
6620da75 | 5809 | ret = pthread_join(kernel_thread, &status); |
4a15001e MD |
5810 | if (ret) { |
5811 | errno = ret; | |
6620da75 | 5812 | PERROR("pthread_join"); |
4a15001e | 5813 | retval = -1; |
6620da75 | 5814 | } |
fac6795d | 5815 | } |
cf3af59e | 5816 | exit_kernel: |
4a15001e | 5817 | |
022d91ba | 5818 | ret = pthread_join(agent_reg_thread, &status); |
4a15001e MD |
5819 | if (ret) { |
5820 | errno = ret; | |
022d91ba | 5821 | PERROR("pthread_join agent"); |
4a15001e | 5822 | retval = -1; |
4d076222 | 5823 | } |
022d91ba | 5824 | exit_agent_reg: |
4a15001e | 5825 | |
9563b0ad | 5826 | ret = pthread_join(apps_notify_thread, &status); |
4a15001e MD |
5827 | if (ret) { |
5828 | errno = ret; | |
9563b0ad | 5829 | PERROR("pthread_join apps notify"); |
4a15001e | 5830 | retval = -1; |
9563b0ad | 5831 | } |
9563b0ad | 5832 | exit_apps_notify: |
4a15001e | 5833 | |
cf3af59e | 5834 | ret = pthread_join(apps_thread, &status); |
4a15001e MD |
5835 | if (ret) { |
5836 | errno = ret; | |
9563b0ad | 5837 | PERROR("pthread_join apps"); |
4a15001e | 5838 | retval = -1; |
cf3af59e | 5839 | } |
cf3af59e | 5840 | exit_apps: |
4a15001e | 5841 | |
099e26bd | 5842 | ret = pthread_join(reg_apps_thread, &status); |
4a15001e MD |
5843 | if (ret) { |
5844 | errno = ret; | |
76d7553f | 5845 | PERROR("pthread_join"); |
4a15001e | 5846 | retval = -1; |
099e26bd | 5847 | } |
099e26bd | 5848 | exit_reg_apps: |
4a15001e | 5849 | |
099e26bd | 5850 | ret = pthread_join(dispatch_thread, &status); |
4a15001e MD |
5851 | if (ret) { |
5852 | errno = ret; | |
76d7553f | 5853 | PERROR("pthread_join"); |
4a15001e | 5854 | retval = -1; |
099e26bd | 5855 | } |
099e26bd | 5856 | exit_dispatch: |
4a15001e | 5857 | |
cf3af59e | 5858 | ret = pthread_join(client_thread, &status); |
4a15001e MD |
5859 | if (ret) { |
5860 | errno = ret; | |
76d7553f | 5861 | PERROR("pthread_join"); |
4a15001e | 5862 | retval = -1; |
cf3af59e | 5863 | } |
4a15001e | 5864 | exit_client: |
a88df331 | 5865 | |
4a15001e MD |
5866 | ret = pthread_join(health_thread, &status); |
5867 | if (ret) { | |
5868 | errno = ret; | |
5869 | PERROR("pthread_join health thread"); | |
5870 | retval = -1; | |
06f525de | 5871 | } |
4a15001e | 5872 | exit_health: |
06f525de | 5873 | |
4a15001e MD |
5874 | exit_init_data: |
5875 | /* | |
5876 | * sessiond_cleanup() is called when no other thread is running, except | |
5877 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
5878 | */ | |
5879 | rcu_thread_online(); | |
5880 | sessiond_cleanup(); | |
5881 | rcu_thread_offline(); | |
5882 | rcu_unregister_thread(); | |
06f525de | 5883 | |
4a15001e MD |
5884 | ret = notify_thread_pipe(ht_cleanup_quit_pipe[1]); |
5885 | if (ret < 0) { | |
5886 | ERR("write error on ht_cleanup quit pipe"); | |
5887 | retval = -1; | |
06f525de DG |
5888 | } |
5889 | ||
0b2dc8df | 5890 | ret = pthread_join(ht_cleanup_thread, &status); |
4a15001e MD |
5891 | if (ret) { |
5892 | errno = ret; | |
0b2dc8df | 5893 | PERROR("pthread_join ht cleanup thread"); |
4a15001e | 5894 | retval = -1; |
0b2dc8df MD |
5895 | } |
5896 | exit_ht_cleanup: | |
25b397f9 | 5897 | exit_set_max_size: |
4a15001e MD |
5898 | |
5899 | utils_close_pipe(ht_cleanup_pipe); | |
5900 | exit_ht_cleanup_pipe: | |
5901 | ||
cf3af59e | 5902 | /* |
4a15001e | 5903 | * Close the ht_cleanup quit pipe. |
cf3af59e | 5904 | */ |
4a15001e MD |
5905 | utils_close_pipe(ht_cleanup_quit_pipe); |
5906 | exit_ht_cleanup_quit_pipe: | |
5907 | ||
5908 | health_app_destroy(health_sessiond); | |
5909 | exit_health_sessiond_cleanup: | |
5910 | ||
5911 | exit_options: | |
5912 | sessiond_cleanup_options(); | |
5913 | ||
5914 | exit_set_signal_handler: | |
5915 | if (!retval) { | |
cf3af59e | 5916 | exit(EXIT_SUCCESS); |
4a15001e MD |
5917 | } else { |
5918 | exit(EXIT_FAILURE); | |
67e40797 | 5919 | } |
fac6795d | 5920 | } |