Commit | Line | Data |
---|---|---|
826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
0fdd1e2c | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
26296c48 | 4 | * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 5 | * |
d14d33bf AM |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License, version 2 only, | |
8 | * as published by the Free Software Foundation. | |
91d76f53 | 9 | * |
d14d33bf AM |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
91d76f53 | 14 | * |
d14d33bf AM |
15 | * You should have received a copy of the GNU General Public License along |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
fac6795d DG |
18 | */ |
19 | ||
20 | #define _GNU_SOURCE | |
fac6795d DG |
21 | #include <getopt.h> |
22 | #include <grp.h> | |
23 | #include <limits.h> | |
0bb7724a | 24 | #include <paths.h> |
fac6795d DG |
25 | #include <pthread.h> |
26 | #include <signal.h> | |
27 | #include <stdio.h> | |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
331744e3 | 30 | #include <inttypes.h> |
0fdd1e2c | 31 | #include <sys/mman.h> |
b73401da | 32 | #include <sys/mount.h> |
1e307fab | 33 | #include <sys/resource.h> |
fac6795d DG |
34 | #include <sys/socket.h> |
35 | #include <sys/stat.h> | |
36 | #include <sys/types.h> | |
0fdd1e2c | 37 | #include <sys/wait.h> |
5c827ce0 | 38 | #include <urcu/uatomic.h> |
fac6795d | 39 | #include <unistd.h> |
3bd1e081 | 40 | #include <config.h> |
fac6795d | 41 | |
990570ed | 42 | #include <common/common.h> |
d27c42b8 | 43 | #include <common/compat/socket.h> |
db758600 DG |
44 | #include <common/defaults.h> |
45 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 46 | #include <common/futex.h> |
00e2e675 | 47 | #include <common/relayd/relayd.h> |
81b86775 | 48 | #include <common/utils.h> |
3ccdf997 | 49 | #include <common/daemonize.h> |
26296c48 | 50 | #include <common/config/config.h> |
fac6795d | 51 | |
10a8a223 | 52 | #include "lttng-sessiond.h" |
7972aab2 | 53 | #include "buffer-registry.h" |
54d01ffb | 54 | #include "channel.h" |
2f77fc4b | 55 | #include "cmd.h" |
00e2e675 | 56 | #include "consumer.h" |
099e26bd | 57 | #include "context.h" |
54d01ffb | 58 | #include "event.h" |
4771f025 | 59 | #include "kernel.h" |
f1e16794 | 60 | #include "kernel-consumer.h" |
096102bd | 61 | #include "modprobe.h" |
0fdd1e2c | 62 | #include "shm.h" |
1e307fab | 63 | #include "ust-ctl.h" |
00e2e675 | 64 | #include "ust-consumer.h" |
8e68d1c8 | 65 | #include "utils.h" |
4063050c | 66 | #include "fd-limit.h" |
8782cc74 | 67 | #include "health-sessiond.h" |
8ac94142 | 68 | #include "testpoint.h" |
d0b96690 | 69 | #include "ust-thread.h" |
022d91ba | 70 | #include "agent-thread.h" |
fb198a11 | 71 | #include "save.h" |
ef367a93 | 72 | #include "load-session-thread.h" |
834978fd | 73 | #include "syscall.h" |
fac6795d | 74 | |
ebaeda94 MD |
75 | #define CONSUMERD_FILE "lttng-consumerd" |
76 | ||
fac6795d | 77 | const char *progname; |
6c71277b | 78 | static const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
26296c48 JG |
79 | static int tracing_group_name_override; |
80 | static char *opt_pidfile; | |
5b8719f5 | 81 | static int opt_sig_parent; |
97e19046 | 82 | static int opt_verbose_consumer; |
72dd7491 | 83 | static int opt_daemon, opt_background; |
4fba7219 | 84 | static int opt_no_kernel; |
ef367a93 | 85 | static char *opt_load_session_path; |
1d4b027a | 86 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
0bb7724a | 87 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ |
67e40797 | 88 | static char *rundir; |
c9cb3e7d | 89 | static int lockfile_fd = -1; |
3bd1e081 | 90 | |
0bb7724a DG |
91 | /* Set to 1 when a SIGUSR1 signal is received. */ |
92 | static int recv_child_signal; | |
93 | ||
a23ec3a7 DG |
94 | /* |
95 | * Consumer daemon specific control data. Every value not initialized here is | |
96 | * set to 0 by the static definition. | |
97 | */ | |
3bd1e081 MD |
98 | static struct consumer_data kconsumer_data = { |
99 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
100 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
101 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
03550b58 MD |
102 | .err_sock = -1, |
103 | .cmd_sock = -1, | |
173af62f DG |
104 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
105 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
106 | .cond = PTHREAD_COND_INITIALIZER, |
107 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 108 | }; |
7753dea8 MD |
109 | static struct consumer_data ustconsumer64_data = { |
110 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
111 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
112 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
113 | .err_sock = -1, |
114 | .cmd_sock = -1, | |
173af62f DG |
115 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
116 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
117 | .cond = PTHREAD_COND_INITIALIZER, |
118 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
119 | }; |
120 | static struct consumer_data ustconsumer32_data = { | |
121 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
122 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
123 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
124 | .err_sock = -1, |
125 | .cmd_sock = -1, | |
173af62f DG |
126 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
127 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
128 | .cond = PTHREAD_COND_INITIALIZER, |
129 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
130 | }; |
131 | ||
26296c48 JG |
132 | /* Command line options */ |
133 | static const struct option long_options[] = { | |
134 | { "client-sock", 1, 0, 'c' }, | |
135 | { "apps-sock", 1, 0, 'a' }, | |
136 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, | |
137 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
138 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, | |
139 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
140 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, | |
141 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
142 | { "consumerd32-path", 1, 0, 'u' }, | |
143 | { "consumerd32-libdir", 1, 0, 'U' }, | |
144 | { "consumerd64-path", 1, 0, 't' }, | |
145 | { "consumerd64-libdir", 1, 0, 'T' }, | |
146 | { "daemonize", 0, 0, 'd' }, | |
72dd7491 | 147 | { "background", 0, 0, 'b' }, |
26296c48 JG |
148 | { "sig-parent", 0, 0, 'S' }, |
149 | { "help", 0, 0, 'h' }, | |
150 | { "group", 1, 0, 'g' }, | |
151 | { "version", 0, 0, 'V' }, | |
152 | { "quiet", 0, 0, 'q' }, | |
153 | { "verbose", 0, 0, 'v' }, | |
154 | { "verbose-consumer", 0, 0, 'Z' }, | |
155 | { "no-kernel", 0, 0, 'N' }, | |
156 | { "pidfile", 1, 0, 'p' }, | |
1b2ef7fe | 157 | { "agent-tcp-port", 1, 0, 'J' }, |
26296c48 | 158 | { "config", 1, 0, 'f' }, |
ef367a93 | 159 | { "load", 1, 0, 'l' }, |
fbb9748b | 160 | { "kmod-probes", 1, 0, 'P' }, |
c9d42407 | 161 | { "extra-kmod-probes", 1, 0, 'e' }, |
26296c48 JG |
162 | { NULL, 0, 0, 0 } |
163 | }; | |
164 | ||
165 | /* Command line options to ignore from configuration file */ | |
166 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
167 | ||
26c9d55e | 168 | /* Shared between threads */ |
099e26bd | 169 | static int dispatch_thread_exit; |
fac6795d | 170 | |
54d01ffb DG |
171 | /* Global application Unix socket path */ |
172 | static char apps_unix_sock_path[PATH_MAX]; | |
173 | /* Global client Unix socket path */ | |
174 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
175 | /* global wait shm path for UST */ |
176 | static char wait_shm_path[PATH_MAX]; | |
44a5e5eb DG |
177 | /* Global health check unix path */ |
178 | static char health_unix_sock_path[PATH_MAX]; | |
fac6795d | 179 | |
1d4b027a | 180 | /* Sockets and FDs */ |
a4b35e07 MD |
181 | static int client_sock = -1; |
182 | static int apps_sock = -1; | |
2f77fc4b | 183 | int kernel_tracer_fd = -1; |
76d7553f | 184 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 185 | |
273ea72c DG |
186 | /* |
187 | * Quit pipe for all threads. This permits a single cancellation point | |
188 | * for all threads when receiving an event on the pipe. | |
189 | */ | |
76d7553f | 190 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 191 | |
099e26bd DG |
192 | /* |
193 | * This pipe is used to inform the thread managing application communication | |
194 | * that a command is queued and ready to be processed. | |
195 | */ | |
76d7553f | 196 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 197 | |
d0b96690 DG |
198 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
199 | ||
1d4b027a | 200 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 201 | static pthread_t apps_thread; |
d0b96690 | 202 | static pthread_t apps_notify_thread; |
099e26bd | 203 | static pthread_t reg_apps_thread; |
1d4b027a | 204 | static pthread_t client_thread; |
7a485870 | 205 | static pthread_t kernel_thread; |
099e26bd | 206 | static pthread_t dispatch_thread; |
44a5e5eb | 207 | static pthread_t health_thread; |
0b2dc8df | 208 | static pthread_t ht_cleanup_thread; |
022d91ba | 209 | static pthread_t agent_reg_thread; |
ef367a93 | 210 | static pthread_t load_session_thread; |
5eb91c98 | 211 | |
099e26bd DG |
212 | /* |
213 | * UST registration command queue. This queue is tied with a futex and uses a N | |
214 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
215 | * | |
b22c5da8 DG |
216 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
217 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
218 | * the line new application socket and monitors it for any I/O error or clean | |
219 | * close that triggers an unregistration of the application. | |
099e26bd DG |
220 | */ |
221 | static struct ust_cmd_queue ust_cmd_queue; | |
222 | ||
b5541356 DG |
223 | /* |
224 | * Pointer initialized before thread creation. | |
225 | * | |
226 | * This points to the tracing session list containing the session count and a | |
227 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
228 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 229 | * |
d063d709 | 230 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 231 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
232 | */ |
233 | static struct ltt_session_list *session_list_ptr; | |
234 | ||
7753dea8 MD |
235 | int ust_consumerd64_fd = -1; |
236 | int ust_consumerd32_fd = -1; | |
237 | ||
fb6f1fa2 YB |
238 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
239 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
240 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
241 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
26296c48 JG |
242 | static int consumerd32_bin_override; |
243 | static int consumerd64_bin_override; | |
244 | static int consumerd32_libdir_override; | |
245 | static int consumerd64_libdir_override; | |
fb09408a | 246 | |
2f77fc4b DG |
247 | static const char *module_proc_lttng = "/proc/lttng"; |
248 | ||
5c827ce0 DG |
249 | /* |
250 | * Consumer daemon state which is changed when spawning it, killing it or in | |
251 | * case of a fatal error. | |
252 | */ | |
253 | enum consumerd_state { | |
254 | CONSUMER_STARTED = 1, | |
255 | CONSUMER_STOPPED = 2, | |
256 | CONSUMER_ERROR = 3, | |
257 | }; | |
258 | ||
259 | /* | |
260 | * This consumer daemon state is used to validate if a client command will be | |
261 | * able to reach the consumer. If not, the client is informed. For instance, | |
262 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
263 | * error to the client. | |
264 | * | |
265 | * The following example shows a possible race condition of this scheme: | |
266 | * | |
267 | * consumer thread error happens | |
268 | * client cmd arrives | |
269 | * client cmd checks state -> still OK | |
270 | * consumer thread exit, sets error | |
271 | * client cmd try to talk to consumer | |
272 | * ... | |
273 | * | |
274 | * However, since the consumer is a different daemon, we have no way of making | |
275 | * sure the command will reach it safely even with this state flag. This is why | |
276 | * we consider that up to the state validation during command processing, the | |
277 | * command is safe. After that, we can not guarantee the correctness of the | |
278 | * client request vis-a-vis the consumer. | |
279 | */ | |
280 | static enum consumerd_state ust_consumerd_state; | |
281 | static enum consumerd_state kernel_consumerd_state; | |
282 | ||
ae9e45b3 DG |
283 | /* |
284 | * Socket timeout for receiving and sending in seconds. | |
285 | */ | |
286 | static int app_socket_timeout; | |
287 | ||
12744796 DG |
288 | /* Set in main() with the current page size. */ |
289 | long page_size; | |
290 | ||
8782cc74 MD |
291 | /* Application health monitoring */ |
292 | struct health_app *health_sessiond; | |
293 | ||
022d91ba DG |
294 | /* Agent TCP port for registration. Used by the agent thread. */ |
295 | unsigned int agent_tcp_port = DEFAULT_AGENT_TCP_PORT; | |
4d076222 | 296 | |
f43f95a9 DG |
297 | /* Am I root or not. */ |
298 | int is_root; /* Set to 1 if the daemon is running as root */ | |
299 | ||
26296c48 JG |
300 | const char * const config_section_name = "sessiond"; |
301 | ||
ef367a93 JG |
302 | /* Load session thread information to operate. */ |
303 | struct load_session_thread_data *load_info; | |
304 | ||
97bc1426 MD |
305 | /* |
306 | * Whether sessiond is ready for commands/health check requests. | |
307 | * NR_LTTNG_SESSIOND_READY must match the number of calls to | |
ef367a93 | 308 | * sessiond_notify_ready(). |
97bc1426 | 309 | */ |
ef367a93 | 310 | #define NR_LTTNG_SESSIOND_READY 3 |
97bc1426 MD |
311 | int lttng_sessiond_ready = NR_LTTNG_SESSIOND_READY; |
312 | ||
313 | /* Notify parents that we are ready for cmd and health check */ | |
ef367a93 JG |
314 | LTTNG_HIDDEN |
315 | void sessiond_notify_ready(void) | |
97bc1426 MD |
316 | { |
317 | if (uatomic_sub_return(<tng_sessiond_ready, 1) == 0) { | |
318 | /* | |
319 | * Notify parent pid that we are ready to accept command | |
320 | * for client side. This ppid is the one from the | |
321 | * external process that spawned us. | |
322 | */ | |
323 | if (opt_sig_parent) { | |
324 | kill(ppid, SIGUSR1); | |
325 | } | |
326 | ||
327 | /* | |
328 | * Notify the parent of the fork() process that we are | |
329 | * ready. | |
330 | */ | |
72dd7491 | 331 | if (opt_daemon || opt_background) { |
97bc1426 MD |
332 | kill(child_ppid, SIGUSR1); |
333 | } | |
334 | } | |
335 | } | |
336 | ||
fb09408a | 337 | static |
7753dea8 | 338 | void setup_consumerd_path(void) |
fb09408a | 339 | { |
fc7a59ce | 340 | const char *bin, *libdir; |
fb09408a | 341 | |
7753dea8 MD |
342 | /* |
343 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
344 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
345 | * has not been defined. | |
7753dea8 | 346 | */ |
ebaeda94 | 347 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
348 | if (!consumerd32_bin[0]) { |
349 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
350 | } |
351 | if (!consumerd32_libdir[0]) { | |
352 | consumerd32_libdir = INSTALL_LIB_PATH; | |
353 | } | |
354 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
355 | if (!consumerd64_bin[0]) { |
356 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 357 | } |
ebaeda94 MD |
358 | if (!consumerd64_libdir[0]) { |
359 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
360 | } |
361 | #else | |
362 | #error "Unknown bitness" | |
363 | #endif | |
364 | ||
fb09408a MD |
365 | /* |
366 | * runtime env. var. overrides the build default. | |
367 | */ | |
fc7a59ce AM |
368 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
369 | if (bin) { | |
370 | consumerd32_bin = bin; | |
7753dea8 | 371 | } |
fc7a59ce AM |
372 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
373 | if (bin) { | |
374 | consumerd64_bin = bin; | |
ebaeda94 | 375 | } |
72f579ee | 376 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
377 | if (libdir) { |
378 | consumerd32_libdir = libdir; | |
379 | } | |
72f579ee | 380 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
381 | if (libdir) { |
382 | consumerd64_libdir = libdir; | |
fb09408a MD |
383 | } |
384 | } | |
385 | ||
5eb91c98 DG |
386 | /* |
387 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
388 | */ | |
d0b96690 | 389 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) |
5eb91c98 DG |
390 | { |
391 | int ret; | |
392 | ||
d0b96690 | 393 | assert(events); |
5eb91c98 DG |
394 | |
395 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
396 | if (ret < 0) { | |
397 | goto error; | |
398 | } | |
399 | ||
400 | /* Add quit pipe */ | |
d0b96690 | 401 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
402 | if (ret < 0) { |
403 | goto error; | |
404 | } | |
405 | ||
406 | return 0; | |
407 | ||
408 | error: | |
409 | return ret; | |
410 | } | |
411 | ||
412 | /* | |
413 | * Check if the thread quit pipe was triggered. | |
414 | * | |
415 | * Return 1 if it was triggered else 0; | |
416 | */ | |
d0b96690 | 417 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
5eb91c98 DG |
418 | { |
419 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
420 | return 1; | |
421 | } | |
422 | ||
423 | return 0; | |
424 | } | |
425 | ||
273ea72c | 426 | /* |
5eb91c98 | 427 | * Init thread quit pipe. |
273ea72c DG |
428 | * |
429 | * Return -1 on error or 0 if all pipes are created. | |
430 | */ | |
431 | static int init_thread_quit_pipe(void) | |
432 | { | |
730389d9 | 433 | int ret, i; |
273ea72c | 434 | |
730389d9 | 435 | ret = pipe(thread_quit_pipe); |
273ea72c | 436 | if (ret < 0) { |
730389d9 | 437 | PERROR("thread quit pipe"); |
273ea72c DG |
438 | goto error; |
439 | } | |
440 | ||
730389d9 DG |
441 | for (i = 0; i < 2; i++) { |
442 | ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC); | |
443 | if (ret < 0) { | |
444 | PERROR("fcntl"); | |
445 | goto error; | |
446 | } | |
447 | } | |
448 | ||
273ea72c DG |
449 | error: |
450 | return ret; | |
451 | } | |
452 | ||
099e26bd DG |
453 | /* |
454 | * Stop all threads by closing the thread quit pipe. | |
455 | */ | |
cf3af59e MD |
456 | static void stop_threads(void) |
457 | { | |
5eb91c98 DG |
458 | int ret; |
459 | ||
cf3af59e MD |
460 | /* Stopping all threads */ |
461 | DBG("Terminating all threads"); | |
54d01ffb | 462 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
463 | if (ret < 0) { |
464 | ERR("write error on thread quit pipe"); | |
465 | } | |
466 | ||
099e26bd | 467 | /* Dispatch thread */ |
26c9d55e | 468 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 469 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
470 | } |
471 | ||
e975f9f8 DG |
472 | /* |
473 | * Close every consumer sockets. | |
474 | */ | |
475 | static void close_consumer_sockets(void) | |
476 | { | |
477 | int ret; | |
478 | ||
479 | if (kconsumer_data.err_sock >= 0) { | |
480 | ret = close(kconsumer_data.err_sock); | |
481 | if (ret < 0) { | |
482 | PERROR("kernel consumer err_sock close"); | |
483 | } | |
484 | } | |
485 | if (ustconsumer32_data.err_sock >= 0) { | |
486 | ret = close(ustconsumer32_data.err_sock); | |
487 | if (ret < 0) { | |
a76cbd9f | 488 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
489 | } |
490 | } | |
491 | if (ustconsumer64_data.err_sock >= 0) { | |
492 | ret = close(ustconsumer64_data.err_sock); | |
493 | if (ret < 0) { | |
a76cbd9f | 494 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
495 | } |
496 | } | |
497 | if (kconsumer_data.cmd_sock >= 0) { | |
498 | ret = close(kconsumer_data.cmd_sock); | |
499 | if (ret < 0) { | |
500 | PERROR("kernel consumer cmd_sock close"); | |
501 | } | |
502 | } | |
503 | if (ustconsumer32_data.cmd_sock >= 0) { | |
504 | ret = close(ustconsumer32_data.cmd_sock); | |
505 | if (ret < 0) { | |
a76cbd9f | 506 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
507 | } |
508 | } | |
509 | if (ustconsumer64_data.cmd_sock >= 0) { | |
510 | ret = close(ustconsumer64_data.cmd_sock); | |
511 | if (ret < 0) { | |
a76cbd9f | 512 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
513 | } |
514 | } | |
515 | } | |
516 | ||
c9cb3e7d JG |
517 | /* |
518 | * Generate the full lock file path using the rundir. | |
519 | * | |
520 | * Return the snprintf() return value thus a negative value is an error. | |
521 | */ | |
522 | static int generate_lock_file_path(char *path, size_t len) | |
523 | { | |
524 | int ret; | |
525 | ||
526 | assert(path); | |
527 | assert(rundir); | |
528 | ||
529 | /* Build lockfile path from rundir. */ | |
530 | ret = snprintf(path, len, "%s/" DEFAULT_LTTNG_SESSIOND_LOCKFILE, rundir); | |
531 | if (ret < 0) { | |
532 | PERROR("snprintf lockfile path"); | |
533 | } | |
534 | ||
535 | return ret; | |
536 | } | |
537 | ||
fac6795d | 538 | /* |
d063d709 | 539 | * Cleanup the daemon |
fac6795d | 540 | */ |
cf3af59e | 541 | static void cleanup(void) |
fac6795d | 542 | { |
ef599319 | 543 | int ret; |
af9737e9 | 544 | struct ltt_session *sess, *stmp; |
8c6c56c2 | 545 | char path[PATH_MAX]; |
fac6795d | 546 | |
1d4b027a | 547 | DBG("Cleaning up"); |
e07ae692 | 548 | |
4e449f3f MD |
549 | /* |
550 | * Close the thread quit pipe. It has already done its job, | |
551 | * since we are now called. | |
552 | */ | |
2f77fc4b DG |
553 | utils_close_pipe(thread_quit_pipe); |
554 | ||
35f90c40 DG |
555 | /* |
556 | * If opt_pidfile is undefined, the default file will be wiped when | |
557 | * removing the rundir. | |
558 | */ | |
559 | if (opt_pidfile) { | |
560 | ret = remove(opt_pidfile); | |
561 | if (ret < 0) { | |
562 | PERROR("remove pidfile %s", opt_pidfile); | |
563 | } | |
564 | } | |
565 | ||
8c6c56c2 MD |
566 | DBG("Removing sessiond and consumerd content of directory %s", rundir); |
567 | ||
568 | /* sessiond */ | |
569 | snprintf(path, PATH_MAX, | |
570 | "%s/%s", | |
571 | rundir, DEFAULT_LTTNG_SESSIOND_PIDFILE); | |
572 | DBG("Removing %s", path); | |
573 | (void) unlink(path); | |
574 | ||
cd9290dd | 575 | snprintf(path, PATH_MAX, "%s/%s", rundir, |
022d91ba | 576 | DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE); |
cd9290dd DG |
577 | DBG("Removing %s", path); |
578 | (void) unlink(path); | |
579 | ||
8c6c56c2 MD |
580 | /* kconsumerd */ |
581 | snprintf(path, PATH_MAX, | |
582 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, | |
583 | rundir); | |
584 | DBG("Removing %s", path); | |
585 | (void) unlink(path); | |
586 | ||
587 | snprintf(path, PATH_MAX, | |
588 | DEFAULT_KCONSUMERD_PATH, | |
589 | rundir); | |
590 | DBG("Removing directory %s", path); | |
591 | (void) rmdir(path); | |
592 | ||
593 | /* ust consumerd 32 */ | |
594 | snprintf(path, PATH_MAX, | |
595 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, | |
596 | rundir); | |
597 | DBG("Removing %s", path); | |
598 | (void) unlink(path); | |
599 | ||
600 | snprintf(path, PATH_MAX, | |
601 | DEFAULT_USTCONSUMERD32_PATH, | |
602 | rundir); | |
603 | DBG("Removing directory %s", path); | |
604 | (void) rmdir(path); | |
605 | ||
606 | /* ust consumerd 64 */ | |
607 | snprintf(path, PATH_MAX, | |
608 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, | |
609 | rundir); | |
610 | DBG("Removing %s", path); | |
611 | (void) unlink(path); | |
612 | ||
613 | snprintf(path, PATH_MAX, | |
614 | DEFAULT_USTCONSUMERD64_PATH, | |
615 | rundir); | |
616 | DBG("Removing directory %s", path); | |
617 | (void) rmdir(path); | |
5461b305 | 618 | |
99bab54f | 619 | DBG("Cleaning up all sessions"); |
fac6795d | 620 | |
b5541356 | 621 | /* Destroy session list mutex */ |
273ea72c DG |
622 | if (session_list_ptr != NULL) { |
623 | pthread_mutex_destroy(&session_list_ptr->lock); | |
624 | ||
625 | /* Cleanup ALL session */ | |
54d01ffb DG |
626 | cds_list_for_each_entry_safe(sess, stmp, |
627 | &session_list_ptr->head, list) { | |
2f77fc4b | 628 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
629 | } |
630 | } | |
631 | ||
db17cf0e JG |
632 | DBG("Cleaning up all agent apps"); |
633 | agent_app_ht_clean(); | |
634 | ||
099e26bd | 635 | DBG("Closing all UST sockets"); |
56fff090 | 636 | ust_app_clean_list(); |
7972aab2 | 637 | buffer_reg_destroy_registries(); |
099e26bd | 638 | |
4fba7219 DG |
639 | if (is_root && !opt_no_kernel) { |
640 | DBG2("Closing kernel fd"); | |
a4b35e07 | 641 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
642 | ret = close(kernel_tracer_fd); |
643 | if (ret) { | |
644 | PERROR("close"); | |
645 | } | |
a4b35e07 | 646 | } |
2f50c8a3 | 647 | DBG("Unloading kernel modules"); |
096102bd | 648 | modprobe_remove_lttng_all(); |
834978fd | 649 | free(syscall_table); |
2f50c8a3 | 650 | } |
2f77fc4b | 651 | |
e975f9f8 DG |
652 | close_consumer_sockets(); |
653 | ||
26296c48 JG |
654 | /* |
655 | * If the override option is set, the pointer points to a *non* const thus | |
656 | * freeing it even though the variable type is set to const. | |
657 | */ | |
658 | if (tracing_group_name_override) { | |
659 | free((void *) tracing_group_name); | |
660 | } | |
661 | if (consumerd32_bin_override) { | |
662 | free((void *) consumerd32_bin); | |
663 | } | |
664 | if (consumerd64_bin_override) { | |
665 | free((void *) consumerd64_bin); | |
666 | } | |
667 | if (consumerd32_libdir_override) { | |
668 | free((void *) consumerd32_libdir); | |
669 | } | |
670 | if (consumerd64_libdir_override) { | |
671 | free((void *) consumerd64_libdir); | |
672 | } | |
673 | ||
674 | if (opt_pidfile) { | |
675 | free(opt_pidfile); | |
676 | } | |
677 | ||
ef367a93 JG |
678 | if (opt_load_session_path) { |
679 | free(opt_load_session_path); | |
680 | } | |
681 | ||
682 | if (load_info) { | |
683 | load_session_destroy_data(load_info); | |
684 | free(load_info); | |
685 | } | |
686 | ||
c9cb3e7d JG |
687 | /* |
688 | * Cleanup lock file by deleting it and finaly closing it which will | |
689 | * release the file system lock. | |
690 | */ | |
691 | if (lockfile_fd >= 0) { | |
692 | char lockfile_path[PATH_MAX]; | |
693 | ||
694 | ret = generate_lock_file_path(lockfile_path, sizeof(lockfile_path)); | |
695 | if (ret > 0) { | |
696 | ret = remove(lockfile_path); | |
697 | if (ret < 0) { | |
698 | PERROR("remove lock file"); | |
699 | } | |
700 | ret = close(lockfile_fd); | |
701 | if (ret < 0) { | |
702 | PERROR("close lock file"); | |
703 | } | |
704 | } | |
705 | } | |
706 | ||
707 | /* | |
708 | * We do NOT rmdir rundir because there are other processes | |
709 | * using it, for instance lttng-relayd, which can start in | |
710 | * parallel with this teardown. | |
711 | */ | |
712 | ||
713 | free(rundir); | |
714 | ||
421cb601 | 715 | /* <fun> */ |
f56a39af | 716 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
717 | "Matthew, BEET driven development works!%c[%dm", |
718 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
719 | /* </fun> */ | |
fac6795d DG |
720 | } |
721 | ||
e065084a | 722 | /* |
d063d709 | 723 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 724 | * |
d063d709 | 725 | * Return lttcomm error code. |
e065084a DG |
726 | */ |
727 | static int send_unix_sock(int sock, void *buf, size_t len) | |
728 | { | |
729 | /* Check valid length */ | |
c617c0c6 | 730 | if (len == 0) { |
e065084a DG |
731 | return -1; |
732 | } | |
733 | ||
734 | return lttcomm_send_unix_sock(sock, buf, len); | |
735 | } | |
736 | ||
5461b305 | 737 | /* |
d063d709 | 738 | * Free memory of a command context structure. |
5461b305 | 739 | */ |
a2fb29a5 | 740 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 741 | { |
a2fb29a5 DG |
742 | DBG("Clean command context structure"); |
743 | if (*cmd_ctx) { | |
744 | if ((*cmd_ctx)->llm) { | |
745 | free((*cmd_ctx)->llm); | |
5461b305 | 746 | } |
a2fb29a5 DG |
747 | if ((*cmd_ctx)->lsm) { |
748 | free((*cmd_ctx)->lsm); | |
5461b305 | 749 | } |
a2fb29a5 DG |
750 | free(*cmd_ctx); |
751 | *cmd_ctx = NULL; | |
5461b305 DG |
752 | } |
753 | } | |
754 | ||
fac6795d | 755 | /* |
0fdd1e2c | 756 | * Notify UST applications using the shm mmap futex. |
fac6795d | 757 | */ |
0fdd1e2c | 758 | static int notify_ust_apps(int active) |
fac6795d | 759 | { |
0fdd1e2c | 760 | char *wait_shm_mmap; |
fac6795d | 761 | |
0fdd1e2c | 762 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 763 | |
0fdd1e2c DG |
764 | /* See shm.c for this call implying mmap, shm and futex calls */ |
765 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
766 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
767 | goto error; |
768 | } | |
769 | ||
0fdd1e2c DG |
770 | /* Wake waiting process */ |
771 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
772 | ||
773 | /* Apps notified successfully */ | |
774 | return 0; | |
fac6795d DG |
775 | |
776 | error: | |
0fdd1e2c | 777 | return -1; |
fac6795d DG |
778 | } |
779 | ||
e065084a | 780 | /* |
d063d709 DG |
781 | * Setup the outgoing data buffer for the response (llm) by allocating the |
782 | * right amount of memory and copying the original information from the lsm | |
783 | * structure. | |
ca95a216 | 784 | * |
d063d709 | 785 | * Return total size of the buffer pointed by buf. |
ca95a216 | 786 | */ |
5461b305 | 787 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 788 | { |
f3ed775e | 789 | int ret, buf_size; |
ca95a216 | 790 | |
f3ed775e | 791 | buf_size = size; |
5461b305 | 792 | |
ba7f0ae5 | 793 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 794 | if (cmd_ctx->llm == NULL) { |
76d7553f | 795 | PERROR("zmalloc"); |
5461b305 | 796 | ret = -ENOMEM; |
ca95a216 DG |
797 | goto error; |
798 | } | |
799 | ||
5461b305 DG |
800 | /* Copy common data */ |
801 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 802 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 803 | |
5461b305 DG |
804 | cmd_ctx->llm->data_size = size; |
805 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
806 | ||
ca95a216 DG |
807 | return buf_size; |
808 | ||
809 | error: | |
810 | return ret; | |
811 | } | |
812 | ||
7a485870 | 813 | /* |
5eb91c98 | 814 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 815 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 816 | */ |
5eb91c98 | 817 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 818 | { |
5eb91c98 | 819 | int ret; |
7a485870 DG |
820 | struct ltt_session *session; |
821 | struct ltt_kernel_channel *channel; | |
822 | ||
5eb91c98 | 823 | DBG("Updating kernel poll set"); |
7a485870 | 824 | |
54d01ffb | 825 | session_lock_list(); |
b5541356 | 826 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 827 | session_lock(session); |
7a485870 | 828 | if (session->kernel_session == NULL) { |
54d01ffb | 829 | session_unlock(session); |
7a485870 DG |
830 | continue; |
831 | } | |
7a485870 | 832 | |
54d01ffb DG |
833 | cds_list_for_each_entry(channel, |
834 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
835 | /* Add channel fd to the kernel poll set */ |
836 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
837 | if (ret < 0) { | |
54d01ffb | 838 | session_unlock(session); |
5eb91c98 DG |
839 | goto error; |
840 | } | |
841 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 842 | } |
54d01ffb | 843 | session_unlock(session); |
7a485870 | 844 | } |
54d01ffb | 845 | session_unlock_list(); |
7a485870 | 846 | |
5eb91c98 | 847 | return 0; |
7a485870 DG |
848 | |
849 | error: | |
54d01ffb | 850 | session_unlock_list(); |
7a485870 DG |
851 | return -1; |
852 | } | |
853 | ||
854 | /* | |
54d01ffb | 855 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 856 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 857 | * |
d063d709 | 858 | * Useful for CPU hotplug feature. |
7a485870 | 859 | */ |
2bdd86d4 | 860 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
861 | { |
862 | int ret = 0; | |
863 | struct ltt_session *session; | |
173af62f | 864 | struct ltt_kernel_session *ksess; |
7a485870 DG |
865 | struct ltt_kernel_channel *channel; |
866 | ||
867 | DBG("Updating kernel streams for channel fd %d", fd); | |
868 | ||
54d01ffb | 869 | session_lock_list(); |
b5541356 | 870 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 871 | session_lock(session); |
7a485870 | 872 | if (session->kernel_session == NULL) { |
54d01ffb | 873 | session_unlock(session); |
7a485870 DG |
874 | continue; |
875 | } | |
173af62f | 876 | ksess = session->kernel_session; |
d9800920 | 877 | |
173af62f | 878 | cds_list_for_each_entry(channel, &ksess->channel_list.head, list) { |
7a485870 DG |
879 | if (channel->fd == fd) { |
880 | DBG("Channel found, updating kernel streams"); | |
881 | ret = kernel_open_channel_stream(channel); | |
882 | if (ret < 0) { | |
b3c750d2 | 883 | goto error; |
7a485870 | 884 | } |
5c786ded JD |
885 | /* Update the stream global counter */ |
886 | ksess->stream_count_global += ret; | |
d9800920 | 887 | |
7a485870 | 888 | /* |
5eb91c98 DG |
889 | * Have we already sent fds to the consumer? If yes, it means |
890 | * that tracing is started so it is safe to send our updated | |
891 | * stream fds. | |
7a485870 | 892 | */ |
173af62f DG |
893 | if (ksess->consumer_fds_sent == 1 && ksess->consumer != NULL) { |
894 | struct lttng_ht_iter iter; | |
895 | struct consumer_socket *socket; | |
896 | ||
e7fe706f | 897 | rcu_read_lock(); |
173af62f DG |
898 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, |
899 | &iter.iter, socket, node.node) { | |
173af62f | 900 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 901 | ret = kernel_consumer_send_channel_stream(socket, |
2bba9e53 DG |
902 | channel, ksess, |
903 | session->output_traces ? 1 : 0); | |
173af62f DG |
904 | pthread_mutex_unlock(socket->lock); |
905 | if (ret < 0) { | |
e7fe706f | 906 | rcu_read_unlock(); |
173af62f DG |
907 | goto error; |
908 | } | |
7a485870 | 909 | } |
e7fe706f | 910 | rcu_read_unlock(); |
7a485870 | 911 | } |
b3c750d2 | 912 | goto error; |
7a485870 DG |
913 | } |
914 | } | |
54d01ffb | 915 | session_unlock(session); |
7a485870 | 916 | } |
54d01ffb | 917 | session_unlock_list(); |
b3c750d2 | 918 | return ret; |
7a485870 | 919 | |
b3c750d2 | 920 | error: |
54d01ffb DG |
921 | session_unlock(session); |
922 | session_unlock_list(); | |
7a485870 DG |
923 | return ret; |
924 | } | |
925 | ||
487cf67c | 926 | /* |
ffe60014 DG |
927 | * For each tracing session, update newly registered apps. The session list |
928 | * lock MUST be acquired before calling this. | |
487cf67c DG |
929 | */ |
930 | static void update_ust_app(int app_sock) | |
931 | { | |
932 | struct ltt_session *sess, *stmp; | |
933 | ||
fdadac08 DG |
934 | /* Consumer is in an ERROR state. Stop any application update. */ |
935 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
936 | /* Stop the update process since the consumer is dead. */ | |
937 | return; | |
938 | } | |
939 | ||
487cf67c DG |
940 | /* For all tracing session(s) */ |
941 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 942 | session_lock(sess); |
421cb601 DG |
943 | if (sess->ust_session) { |
944 | ust_app_global_update(sess->ust_session, app_sock); | |
945 | } | |
4ee14516 | 946 | session_unlock(sess); |
487cf67c DG |
947 | } |
948 | } | |
949 | ||
7a485870 | 950 | /* |
d063d709 | 951 | * This thread manage event coming from the kernel. |
7a485870 | 952 | * |
d063d709 DG |
953 | * Features supported in this thread: |
954 | * -) CPU Hotplug | |
7a485870 DG |
955 | */ |
956 | static void *thread_manage_kernel(void *data) | |
957 | { | |
139ac872 | 958 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 959 | uint32_t revents, nb_fd; |
7a485870 | 960 | char tmp; |
5eb91c98 | 961 | struct lttng_poll_event events; |
7a485870 | 962 | |
6993eeb3 | 963 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 964 | |
6c71277b | 965 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 966 | |
d5d63bf1 DG |
967 | /* |
968 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 969 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 970 | */ |
6d737ce4 | 971 | lttng_poll_init(&events); |
d5d63bf1 | 972 | |
e547b070 | 973 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
974 | goto error_testpoint; |
975 | } | |
8ac94142 | 976 | |
840cb59c | 977 | health_code_update(); |
44a5e5eb | 978 | |
e547b070 | 979 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 980 | goto error_testpoint; |
6993eeb3 CB |
981 | } |
982 | ||
7a485870 | 983 | while (1) { |
840cb59c | 984 | health_code_update(); |
44a5e5eb | 985 | |
7a485870 | 986 | if (update_poll_flag == 1) { |
d21b0d71 DG |
987 | /* Clean events object. We are about to populate it again. */ |
988 | lttng_poll_clean(&events); | |
989 | ||
d0b96690 | 990 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
991 | if (ret < 0) { |
992 | goto error_poll_create; | |
993 | } | |
994 | ||
995 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
996 | if (ret < 0) { | |
997 | goto error; | |
998 | } | |
5f822d0a | 999 | |
d21b0d71 | 1000 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
1001 | ret = update_kernel_poll(&events); |
1002 | if (ret < 0) { | |
7a485870 DG |
1003 | goto error; |
1004 | } | |
1005 | update_poll_flag = 0; | |
1006 | } | |
1007 | ||
65da3cc7 | 1008 | DBG("Thread kernel polling"); |
7a485870 DG |
1009 | |
1010 | /* Poll infinite value of time */ | |
88f2b785 | 1011 | restart: |
a78af745 | 1012 | health_poll_entry(); |
5eb91c98 | 1013 | ret = lttng_poll_wait(&events, -1); |
65da3cc7 MD |
1014 | DBG("Thread kernel return from poll on %d fds", |
1015 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1016 | health_poll_exit(); |
7a485870 | 1017 | if (ret < 0) { |
88f2b785 MD |
1018 | /* |
1019 | * Restart interrupted system call. | |
1020 | */ | |
1021 | if (errno == EINTR) { | |
1022 | goto restart; | |
1023 | } | |
7a485870 DG |
1024 | goto error; |
1025 | } else if (ret == 0) { | |
1026 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
1027 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
1028 | "This should not have happened! Continuing..."); | |
7a485870 DG |
1029 | continue; |
1030 | } | |
1031 | ||
0d9c5d77 DG |
1032 | nb_fd = ret; |
1033 | ||
5eb91c98 DG |
1034 | for (i = 0; i < nb_fd; i++) { |
1035 | /* Fetch once the poll data */ | |
1036 | revents = LTTNG_POLL_GETEV(&events, i); | |
1037 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 1038 | |
840cb59c | 1039 | health_code_update(); |
44a5e5eb | 1040 | |
e0077699 MD |
1041 | if (!revents) { |
1042 | /* No activity for this FD (poll implementation). */ | |
1043 | continue; | |
1044 | } | |
1045 | ||
5eb91c98 | 1046 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1047 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1048 | if (ret) { |
139ac872 MD |
1049 | err = 0; |
1050 | goto exit; | |
5eb91c98 | 1051 | } |
7a485870 | 1052 | |
5eb91c98 | 1053 | /* Check for data on kernel pipe */ |
584fc280 MD |
1054 | if (revents & LPOLLIN) { |
1055 | if (pollfd == kernel_poll_pipe[0]) { | |
1056 | (void) lttng_read(kernel_poll_pipe[0], | |
1057 | &tmp, 1); | |
1058 | /* | |
1059 | * Ret value is useless here, if this pipe gets any actions an | |
1060 | * update is required anyway. | |
1061 | */ | |
1062 | update_poll_flag = 1; | |
1063 | continue; | |
1064 | } else { | |
1065 | /* | |
1066 | * New CPU detected by the kernel. Adding kernel stream to | |
1067 | * kernel session and updating the kernel consumer | |
1068 | */ | |
2bdd86d4 | 1069 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
1070 | if (ret < 0) { |
1071 | continue; | |
1072 | } | |
1073 | break; | |
7a485870 | 1074 | } |
584fc280 MD |
1075 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1076 | update_poll_flag = 1; | |
1077 | continue; | |
1078 | } else { | |
1079 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1080 | goto error; | |
7a485870 DG |
1081 | } |
1082 | } | |
1083 | } | |
1084 | ||
139ac872 | 1085 | exit: |
7a485870 | 1086 | error: |
5eb91c98 | 1087 | lttng_poll_clean(&events); |
76d7553f | 1088 | error_poll_create: |
6993eeb3 | 1089 | error_testpoint: |
6620da75 DG |
1090 | utils_close_pipe(kernel_poll_pipe); |
1091 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 1092 | if (err) { |
840cb59c | 1093 | health_error(); |
139ac872 | 1094 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
1095 | WARN("Kernel thread died unexpectedly. " |
1096 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 1097 | } |
8782cc74 | 1098 | health_unregister(health_sessiond); |
76d7553f | 1099 | DBG("Kernel thread dying"); |
7a485870 DG |
1100 | return NULL; |
1101 | } | |
1102 | ||
a23ec3a7 DG |
1103 | /* |
1104 | * Signal pthread condition of the consumer data that the thread. | |
1105 | */ | |
1106 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
1107 | { | |
1108 | pthread_mutex_lock(&data->cond_mutex); | |
1109 | ||
1110 | /* | |
1111 | * The state is set before signaling. It can be any value, it's the waiter | |
1112 | * job to correctly interpret this condition variable associated to the | |
1113 | * consumer pthread_cond. | |
1114 | * | |
1115 | * A value of 0 means that the corresponding thread of the consumer data | |
1116 | * was not started. 1 indicates that the thread has started and is ready | |
1117 | * for action. A negative value means that there was an error during the | |
1118 | * thread bootstrap. | |
1119 | */ | |
1120 | data->consumer_thread_is_ready = state; | |
1121 | (void) pthread_cond_signal(&data->cond); | |
1122 | ||
1123 | pthread_mutex_unlock(&data->cond_mutex); | |
1124 | } | |
1125 | ||
1d4b027a | 1126 | /* |
3bd1e081 | 1127 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1128 | */ |
3bd1e081 | 1129 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1130 | { |
42fc1d0b | 1131 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 1132 | uint32_t revents, nb_fd; |
1d4b027a | 1133 | enum lttcomm_return_code code; |
5eb91c98 | 1134 | struct lttng_poll_event events; |
3bd1e081 | 1135 | struct consumer_data *consumer_data = data; |
1d4b027a | 1136 | |
3bd1e081 | 1137 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1138 | |
b318c0ee MD |
1139 | rcu_register_thread(); |
1140 | rcu_thread_online(); | |
1141 | ||
6c71277b | 1142 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1143 | |
855060f8 | 1144 | health_code_update(); |
9449cc75 | 1145 | |
5eb91c98 | 1146 | /* |
331744e3 JD |
1147 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1148 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1149 | */ |
331744e3 | 1150 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1151 | if (ret < 0) { |
76d7553f | 1152 | goto error_poll; |
5eb91c98 | 1153 | } |
273ea72c | 1154 | |
edb8b045 DG |
1155 | /* |
1156 | * The error socket here is already in a listening state which was done | |
1157 | * just before spawning this thread to avoid a race between the consumer | |
1158 | * daemon exec trying to connect and the listen() call. | |
1159 | */ | |
3bd1e081 | 1160 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1161 | if (ret < 0) { |
1162 | goto error; | |
1163 | } | |
1164 | ||
840cb59c | 1165 | health_code_update(); |
44a5e5eb | 1166 | |
331744e3 | 1167 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1168 | restart: |
a78af745 | 1169 | health_poll_entry(); |
8ac94142 | 1170 | |
e547b070 | 1171 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
1172 | goto error; |
1173 | } | |
8ac94142 | 1174 | |
5eb91c98 | 1175 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1176 | health_poll_exit(); |
273ea72c | 1177 | if (ret < 0) { |
88f2b785 MD |
1178 | /* |
1179 | * Restart interrupted system call. | |
1180 | */ | |
1181 | if (errno == EINTR) { | |
1182 | goto restart; | |
1183 | } | |
273ea72c DG |
1184 | goto error; |
1185 | } | |
1186 | ||
0d9c5d77 DG |
1187 | nb_fd = ret; |
1188 | ||
5eb91c98 DG |
1189 | for (i = 0; i < nb_fd; i++) { |
1190 | /* Fetch once the poll data */ | |
1191 | revents = LTTNG_POLL_GETEV(&events, i); | |
1192 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1193 | ||
840cb59c | 1194 | health_code_update(); |
44a5e5eb | 1195 | |
e0077699 MD |
1196 | if (!revents) { |
1197 | /* No activity for this FD (poll implementation). */ | |
1198 | continue; | |
1199 | } | |
1200 | ||
5eb91c98 | 1201 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1202 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1203 | if (ret) { |
139ac872 MD |
1204 | err = 0; |
1205 | goto exit; | |
5eb91c98 DG |
1206 | } |
1207 | ||
1208 | /* Event on the registration socket */ | |
3bd1e081 | 1209 | if (pollfd == consumer_data->err_sock) { |
584fc280 MD |
1210 | if (revents & LPOLLIN) { |
1211 | continue; | |
1212 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1213 | ERR("consumer err socket poll error"); |
5eb91c98 | 1214 | goto error; |
584fc280 MD |
1215 | } else { |
1216 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1217 | goto error; | |
5eb91c98 DG |
1218 | } |
1219 | } | |
273ea72c DG |
1220 | } |
1221 | ||
3bd1e081 | 1222 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1223 | if (sock < 0) { |
1224 | goto error; | |
1225 | } | |
1226 | ||
b662582b DG |
1227 | /* |
1228 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1229 | * show must go on. | |
1230 | */ | |
1231 | (void) utils_set_fd_cloexec(sock); | |
1232 | ||
840cb59c | 1233 | health_code_update(); |
44a5e5eb | 1234 | |
3bd1e081 | 1235 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1236 | |
712ea556 | 1237 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1238 | ret = lttcomm_recv_unix_sock(sock, &code, |
1239 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1240 | if (ret <= 0) { |
1241 | goto error; | |
1242 | } | |
1243 | ||
840cb59c | 1244 | health_code_update(); |
f73fabfd | 1245 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
331744e3 | 1246 | /* Connect both socket, command and metadata. */ |
3bd1e081 MD |
1247 | consumer_data->cmd_sock = |
1248 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
4ce514c4 | 1249 | consumer_data->metadata_fd = |
331744e3 | 1250 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); |
92db7cdc DG |
1251 | if (consumer_data->cmd_sock < 0 |
1252 | || consumer_data->metadata_fd < 0) { | |
331744e3 | 1253 | PERROR("consumer connect cmd socket"); |
a23ec3a7 DG |
1254 | /* On error, signal condition and quit. */ |
1255 | signal_consumer_condition(consumer_data, -1); | |
1d4b027a DG |
1256 | goto error; |
1257 | } | |
9363801e | 1258 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; |
331744e3 JD |
1259 | /* Create metadata socket lock. */ |
1260 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1261 | if (consumer_data->metadata_sock.lock == NULL) { | |
1262 | PERROR("zmalloc pthread mutex"); | |
1263 | ret = -1; | |
1264 | goto error; | |
1265 | } | |
1266 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1267 | ||
a23ec3a7 | 1268 | signal_consumer_condition(consumer_data, 1); |
331744e3 JD |
1269 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); |
1270 | DBG("Consumer metadata socket ready (fd: %d)", | |
4ce514c4 | 1271 | consumer_data->metadata_fd); |
1d4b027a | 1272 | } else { |
3bd1e081 | 1273 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1274 | lttcomm_get_readable_code(-code)); |
1275 | goto error; | |
1276 | } | |
1277 | ||
331744e3 | 1278 | /* Remove the consumerd error sock since we've established a connexion */ |
3bd1e081 | 1279 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1280 | if (ret < 0) { |
72079cae DG |
1281 | goto error; |
1282 | } | |
1283 | ||
331744e3 | 1284 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1285 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1286 | if (ret < 0) { | |
72079cae | 1287 | goto error; |
5eb91c98 DG |
1288 | } |
1289 | ||
331744e3 | 1290 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1291 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1292 | LPOLLIN | LPOLLRDHUP); |
1293 | if (ret < 0) { | |
1294 | goto error; | |
1295 | } | |
1296 | ||
840cb59c | 1297 | health_code_update(); |
44a5e5eb | 1298 | |
331744e3 | 1299 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1300 | restart_poll: |
331744e3 | 1301 | while (1) { |
42fc1d0b DG |
1302 | health_code_update(); |
1303 | ||
1304 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
1305 | if (should_quit) { | |
1306 | /* Not a health error. */ | |
1307 | err = 0; | |
1308 | goto exit; | |
1309 | } | |
1310 | ||
331744e3 JD |
1311 | health_poll_entry(); |
1312 | ret = lttng_poll_wait(&events, -1); | |
1313 | health_poll_exit(); | |
1314 | if (ret < 0) { | |
1315 | /* | |
1316 | * Restart interrupted system call. | |
1317 | */ | |
1318 | if (errno == EINTR) { | |
1319 | goto restart_poll; | |
1320 | } | |
1321 | goto error; | |
88f2b785 | 1322 | } |
72079cae | 1323 | |
331744e3 | 1324 | nb_fd = ret; |
0d9c5d77 | 1325 | |
331744e3 JD |
1326 | for (i = 0; i < nb_fd; i++) { |
1327 | /* Fetch once the poll data */ | |
1328 | revents = LTTNG_POLL_GETEV(&events, i); | |
1329 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1330 | |
331744e3 | 1331 | health_code_update(); |
44a5e5eb | 1332 | |
e0077699 MD |
1333 | if (!revents) { |
1334 | /* No activity for this FD (poll implementation). */ | |
1335 | continue; | |
1336 | } | |
1337 | ||
42fc1d0b DG |
1338 | /* |
1339 | * Thread quit pipe has been triggered, flag that we should stop | |
1340 | * but continue the current loop to handle potential data from | |
1341 | * consumer. | |
1342 | */ | |
1343 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 1344 | |
331744e3 JD |
1345 | if (pollfd == sock) { |
1346 | /* Event on the consumerd socket */ | |
584fc280 MD |
1347 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1348 | && !(revents & LPOLLIN)) { | |
331744e3 JD |
1349 | ERR("consumer err socket second poll error"); |
1350 | goto error; | |
1351 | } | |
1352 | health_code_update(); | |
1353 | /* Wait for any kconsumerd error */ | |
1354 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1355 | sizeof(enum lttcomm_return_code)); | |
1356 | if (ret <= 0) { | |
1357 | ERR("consumer closed the command socket"); | |
1358 | goto error; | |
1359 | } | |
1360 | ||
1361 | ERR("consumer return code : %s", | |
1362 | lttcomm_get_readable_code(-code)); | |
1363 | ||
1364 | goto exit; | |
4ce514c4 | 1365 | } else if (pollfd == consumer_data->metadata_fd) { |
584fc280 MD |
1366 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1367 | && !(revents & LPOLLIN)) { | |
1368 | ERR("consumer err metadata socket second poll error"); | |
1369 | goto error; | |
1370 | } | |
331744e3 JD |
1371 | /* UST metadata requests */ |
1372 | ret = ust_consumer_metadata_request( | |
1373 | &consumer_data->metadata_sock); | |
1374 | if (ret < 0) { | |
1375 | ERR("Handling metadata request"); | |
1376 | goto error; | |
1377 | } | |
5eb91c98 | 1378 | } |
42fc1d0b | 1379 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 1380 | } |
331744e3 | 1381 | health_code_update(); |
5eb91c98 DG |
1382 | } |
1383 | ||
139ac872 | 1384 | exit: |
1d4b027a | 1385 | error: |
fdadac08 DG |
1386 | /* |
1387 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1388 | * thread might be using them so get exclusive access which will abort all |
1389 | * other consumer command by other threads. | |
fdadac08 DG |
1390 | */ |
1391 | pthread_mutex_lock(&consumer_data->lock); | |
1392 | ||
5c827ce0 DG |
1393 | /* Immediately set the consumerd state to stopped */ |
1394 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1395 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1396 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1397 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1398 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1399 | } else { | |
1400 | /* Code flow error... */ | |
1401 | assert(0); | |
1402 | } | |
1403 | ||
76d7553f MD |
1404 | if (consumer_data->err_sock >= 0) { |
1405 | ret = close(consumer_data->err_sock); | |
1406 | if (ret) { | |
1407 | PERROR("close"); | |
1408 | } | |
a76cbd9f | 1409 | consumer_data->err_sock = -1; |
76d7553f MD |
1410 | } |
1411 | if (consumer_data->cmd_sock >= 0) { | |
1412 | ret = close(consumer_data->cmd_sock); | |
1413 | if (ret) { | |
1414 | PERROR("close"); | |
1415 | } | |
a76cbd9f | 1416 | consumer_data->cmd_sock = -1; |
76d7553f | 1417 | } |
96544455 SS |
1418 | if (consumer_data->metadata_sock.fd_ptr && |
1419 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1420 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1421 | if (ret) { |
1422 | PERROR("close"); | |
1423 | } | |
1424 | } | |
76d7553f MD |
1425 | if (sock >= 0) { |
1426 | ret = close(sock); | |
1427 | if (ret) { | |
1428 | PERROR("close"); | |
1429 | } | |
1430 | } | |
273ea72c | 1431 | |
3bd1e081 MD |
1432 | unlink(consumer_data->err_unix_sock_path); |
1433 | unlink(consumer_data->cmd_unix_sock_path); | |
1434 | consumer_data->pid = 0; | |
fdadac08 | 1435 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1436 | |
fdadac08 | 1437 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1438 | if (consumer_data->metadata_sock.lock) { |
1439 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1440 | free(consumer_data->metadata_sock.lock); | |
1441 | } | |
5eb91c98 | 1442 | lttng_poll_clean(&events); |
76d7553f | 1443 | error_poll: |
139ac872 | 1444 | if (err) { |
840cb59c | 1445 | health_error(); |
139ac872 MD |
1446 | ERR("Health error occurred in %s", __func__); |
1447 | } | |
8782cc74 | 1448 | health_unregister(health_sessiond); |
76d7553f | 1449 | DBG("consumer thread cleanup completed"); |
0177d773 | 1450 | |
b318c0ee MD |
1451 | rcu_thread_offline(); |
1452 | rcu_unregister_thread(); | |
1453 | ||
5eb91c98 | 1454 | return NULL; |
099e26bd DG |
1455 | } |
1456 | ||
099e26bd DG |
1457 | /* |
1458 | * This thread manage application communication. | |
1d4b027a DG |
1459 | */ |
1460 | static void *thread_manage_apps(void *data) | |
099e26bd | 1461 | { |
139ac872 | 1462 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1463 | ssize_t size_ret; |
5eb91c98 | 1464 | uint32_t revents, nb_fd; |
5eb91c98 | 1465 | struct lttng_poll_event events; |
099e26bd DG |
1466 | |
1467 | DBG("[thread] Manage application started"); | |
1468 | ||
f6a9efaa DG |
1469 | rcu_register_thread(); |
1470 | rcu_thread_online(); | |
1471 | ||
6c71277b | 1472 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1473 | |
e547b070 | 1474 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1475 | goto error_testpoint; |
1476 | } | |
1477 | ||
840cb59c | 1478 | health_code_update(); |
44a5e5eb | 1479 | |
d0b96690 | 1480 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1481 | if (ret < 0) { |
76d7553f | 1482 | goto error_poll_create; |
5eb91c98 | 1483 | } |
099e26bd | 1484 | |
5eb91c98 DG |
1485 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1486 | if (ret < 0) { | |
1487 | goto error; | |
1488 | } | |
099e26bd | 1489 | |
e547b070 | 1490 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1491 | goto error; |
1492 | } | |
8ac94142 | 1493 | |
840cb59c | 1494 | health_code_update(); |
44a5e5eb | 1495 | |
5eb91c98 | 1496 | while (1) { |
65da3cc7 | 1497 | DBG("Apps thread polling"); |
099e26bd DG |
1498 | |
1499 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1500 | restart: |
a78af745 | 1501 | health_poll_entry(); |
5eb91c98 | 1502 | ret = lttng_poll_wait(&events, -1); |
65da3cc7 MD |
1503 | DBG("Apps thread return from poll on %d fds", |
1504 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1505 | health_poll_exit(); |
099e26bd | 1506 | if (ret < 0) { |
88f2b785 MD |
1507 | /* |
1508 | * Restart interrupted system call. | |
1509 | */ | |
1510 | if (errno == EINTR) { | |
1511 | goto restart; | |
1512 | } | |
099e26bd DG |
1513 | goto error; |
1514 | } | |
1515 | ||
0d9c5d77 DG |
1516 | nb_fd = ret; |
1517 | ||
5eb91c98 DG |
1518 | for (i = 0; i < nb_fd; i++) { |
1519 | /* Fetch once the poll data */ | |
1520 | revents = LTTNG_POLL_GETEV(&events, i); | |
1521 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1522 | ||
840cb59c | 1523 | health_code_update(); |
44a5e5eb | 1524 | |
e0077699 MD |
1525 | if (!revents) { |
1526 | /* No activity for this FD (poll implementation). */ | |
1527 | continue; | |
1528 | } | |
1529 | ||
5eb91c98 | 1530 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1531 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1532 | if (ret) { |
139ac872 MD |
1533 | err = 0; |
1534 | goto exit; | |
5eb91c98 | 1535 | } |
099e26bd | 1536 | |
5eb91c98 DG |
1537 | /* Inspect the apps cmd pipe */ |
1538 | if (pollfd == apps_cmd_pipe[0]) { | |
584fc280 | 1539 | if (revents & LPOLLIN) { |
d0b96690 DG |
1540 | int sock; |
1541 | ||
5eb91c98 | 1542 | /* Empty pipe */ |
6cd525e8 MD |
1543 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1544 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1545 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1546 | goto error; |
1547 | } | |
099e26bd | 1548 | |
840cb59c | 1549 | health_code_update(); |
44a5e5eb | 1550 | |
ffe60014 | 1551 | /* |
584fc280 MD |
1552 | * Since this is a command socket (write then read), |
1553 | * we only monitor the error events of the socket. | |
ffe60014 | 1554 | */ |
d0b96690 DG |
1555 | ret = lttng_poll_add(&events, sock, |
1556 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1557 | if (ret < 0) { | |
5eb91c98 | 1558 | goto error; |
e0c7ec2b | 1559 | } |
acc7b41b | 1560 | |
d0b96690 | 1561 | DBG("Apps with sock %d added to poll set", sock); |
584fc280 MD |
1562 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1563 | ERR("Apps command pipe error"); | |
1564 | goto error; | |
1565 | } else { | |
1566 | ERR("Unknown poll events %u for sock %d", revents, pollfd); | |
1567 | goto error; | |
0177d773 | 1568 | } |
5eb91c98 DG |
1569 | } else { |
1570 | /* | |
54d01ffb DG |
1571 | * At this point, we know that a registered application made |
1572 | * the event at poll_wait. | |
5eb91c98 DG |
1573 | */ |
1574 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1575 | /* Removing from the poll set */ | |
1576 | ret = lttng_poll_del(&events, pollfd); | |
1577 | if (ret < 0) { | |
1578 | goto error; | |
1579 | } | |
099e26bd | 1580 | |
b9d9b220 | 1581 | /* Socket closed on remote end. */ |
56fff090 | 1582 | ust_app_unregister(pollfd); |
584fc280 MD |
1583 | } else { |
1584 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1585 | goto error; | |
5eb91c98 | 1586 | } |
099e26bd | 1587 | } |
44a5e5eb | 1588 | |
840cb59c | 1589 | health_code_update(); |
099e26bd | 1590 | } |
099e26bd DG |
1591 | } |
1592 | ||
139ac872 | 1593 | exit: |
099e26bd | 1594 | error: |
5eb91c98 | 1595 | lttng_poll_clean(&events); |
76d7553f | 1596 | error_poll_create: |
6993eeb3 | 1597 | error_testpoint: |
6620da75 DG |
1598 | utils_close_pipe(apps_cmd_pipe); |
1599 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1600 | ||
1601 | /* | |
1602 | * We don't clean the UST app hash table here since already registered | |
1603 | * applications can still be controlled so let them be until the session | |
1604 | * daemon dies or the applications stop. | |
1605 | */ | |
1606 | ||
139ac872 | 1607 | if (err) { |
840cb59c | 1608 | health_error(); |
139ac872 MD |
1609 | ERR("Health error occurred in %s", __func__); |
1610 | } | |
8782cc74 | 1611 | health_unregister(health_sessiond); |
76d7553f | 1612 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1613 | rcu_thread_offline(); |
1614 | rcu_unregister_thread(); | |
099e26bd DG |
1615 | return NULL; |
1616 | } | |
1617 | ||
d0b96690 | 1618 | /* |
d88aee68 DG |
1619 | * Send a socket to a thread This is called from the dispatch UST registration |
1620 | * thread once all sockets are set for the application. | |
d0b96690 | 1621 | * |
b85dc84c DG |
1622 | * The sock value can be invalid, we don't really care, the thread will handle |
1623 | * it and make the necessary cleanup if so. | |
1624 | * | |
d0b96690 DG |
1625 | * On success, return 0 else a negative value being the errno message of the |
1626 | * write(). | |
1627 | */ | |
d88aee68 | 1628 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1629 | { |
6cd525e8 | 1630 | ssize_t ret; |
d0b96690 | 1631 | |
b85dc84c DG |
1632 | /* |
1633 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1634 | * before calling this function being a shutdown state of the thread. | |
1635 | */ | |
1636 | if (fd < 0) { | |
1637 | ret = -EBADF; | |
1638 | goto error; | |
1639 | } | |
d0b96690 | 1640 | |
6cd525e8 MD |
1641 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1642 | if (ret < sizeof(sock)) { | |
d88aee68 | 1643 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1644 | if (ret < 0) { |
1645 | ret = -errno; | |
1646 | } | |
1647 | goto error; | |
1648 | } | |
1649 | ||
1650 | /* All good. Don't send back the write positive ret value. */ | |
1651 | ret = 0; | |
1652 | error: | |
6cd525e8 | 1653 | return (int) ret; |
d0b96690 DG |
1654 | } |
1655 | ||
f45e313d DG |
1656 | /* |
1657 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1658 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1659 | * notify socket is never received. | |
1660 | */ | |
1661 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1662 | { | |
1663 | int ret, nb_fd = 0, i; | |
1664 | unsigned int fd_added = 0; | |
1665 | struct lttng_poll_event events; | |
1666 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1667 | ||
1668 | assert(wait_queue); | |
1669 | ||
1670 | lttng_poll_init(&events); | |
1671 | ||
1672 | /* Just skip everything for an empty queue. */ | |
1673 | if (!wait_queue->count) { | |
1674 | goto end; | |
1675 | } | |
1676 | ||
1677 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1678 | if (ret < 0) { | |
1679 | goto error_create; | |
1680 | } | |
1681 | ||
1682 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1683 | &wait_queue->head, head) { | |
1684 | assert(wait_node->app); | |
1685 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1686 | LPOLLHUP | LPOLLERR); | |
1687 | if (ret < 0) { | |
1688 | goto error; | |
1689 | } | |
1690 | ||
1691 | fd_added = 1; | |
1692 | } | |
1693 | ||
1694 | if (!fd_added) { | |
1695 | goto end; | |
1696 | } | |
1697 | ||
1698 | /* | |
1699 | * Poll but don't block so we can quickly identify the faulty events and | |
1700 | * clean them afterwards from the wait queue. | |
1701 | */ | |
1702 | ret = lttng_poll_wait(&events, 0); | |
1703 | if (ret < 0) { | |
1704 | goto error; | |
1705 | } | |
1706 | nb_fd = ret; | |
1707 | ||
1708 | for (i = 0; i < nb_fd; i++) { | |
1709 | /* Get faulty FD. */ | |
1710 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1711 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1712 | ||
e0077699 MD |
1713 | if (!revents) { |
1714 | /* No activity for this FD (poll implementation). */ | |
1715 | continue; | |
1716 | } | |
1717 | ||
f45e313d DG |
1718 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1719 | &wait_queue->head, head) { | |
1720 | if (pollfd == wait_node->app->sock && | |
1721 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1722 | cds_list_del(&wait_node->head); | |
1723 | wait_queue->count--; | |
1724 | ust_app_destroy(wait_node->app); | |
1725 | free(wait_node); | |
1726 | break; | |
584fc280 MD |
1727 | } else { |
1728 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1729 | goto error; | |
f45e313d DG |
1730 | } |
1731 | } | |
1732 | } | |
1733 | ||
1734 | if (nb_fd > 0) { | |
1735 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1736 | } | |
1737 | ||
1738 | end: | |
1739 | lttng_poll_clean(&events); | |
1740 | return; | |
1741 | ||
1742 | error: | |
1743 | lttng_poll_clean(&events); | |
1744 | error_create: | |
1745 | ERR("Unable to sanitize wait queue"); | |
1746 | return; | |
1747 | } | |
1748 | ||
099e26bd DG |
1749 | /* |
1750 | * Dispatch request from the registration threads to the application | |
1751 | * communication thread. | |
1752 | */ | |
1753 | static void *thread_dispatch_ust_registration(void *data) | |
1754 | { | |
12e2b881 | 1755 | int ret, err = -1; |
8bdee6e2 | 1756 | struct cds_wfcq_node *node; |
099e26bd | 1757 | struct ust_command *ust_cmd = NULL; |
f45e313d DG |
1758 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1759 | struct ust_reg_wait_queue wait_queue = { | |
1760 | .count = 0, | |
1761 | }; | |
d0b96690 | 1762 | |
6c71277b | 1763 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1764 | |
9ad42ec1 MD |
1765 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1766 | goto error_testpoint; | |
1767 | } | |
1768 | ||
12e2b881 MD |
1769 | health_code_update(); |
1770 | ||
f45e313d | 1771 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1772 | |
1773 | DBG("[thread] Dispatch UST command started"); | |
1774 | ||
26c9d55e | 1775 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
12e2b881 MD |
1776 | health_code_update(); |
1777 | ||
099e26bd DG |
1778 | /* Atomically prepare the queue futex */ |
1779 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1780 | ||
1781 | do { | |
d0b96690 | 1782 | struct ust_app *app = NULL; |
7972aab2 | 1783 | ust_cmd = NULL; |
d0b96690 | 1784 | |
f45e313d DG |
1785 | /* |
1786 | * Make sure we don't have node(s) that have hung up before receiving | |
1787 | * the notify socket. This is to clean the list in order to avoid | |
1788 | * memory leaks from notify socket that are never seen. | |
1789 | */ | |
1790 | sanitize_wait_queue(&wait_queue); | |
1791 | ||
12e2b881 | 1792 | health_code_update(); |
099e26bd | 1793 | /* Dequeue command for registration */ |
8bdee6e2 | 1794 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1795 | if (node == NULL) { |
00a17c97 | 1796 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1797 | /* Continue thread execution */ |
1798 | break; | |
1799 | } | |
1800 | ||
1801 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1802 | ||
2f50c8a3 DG |
1803 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1804 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1805 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1806 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1807 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1808 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1809 | |
1810 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1811 | wait_node = zmalloc(sizeof(*wait_node)); | |
1812 | if (!wait_node) { | |
1813 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1814 | ret = close(ust_cmd->sock); |
1815 | if (ret < 0) { | |
1816 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1817 | } | |
51dec90d | 1818 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1819 | free(ust_cmd); |
d0b96690 DG |
1820 | goto error; |
1821 | } | |
1822 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1823 | ||
1824 | /* Create application object if socket is CMD. */ | |
1825 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1826 | ust_cmd->sock); | |
1827 | if (!wait_node->app) { | |
1828 | ret = close(ust_cmd->sock); | |
1829 | if (ret < 0) { | |
1830 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1831 | } |
51dec90d | 1832 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1833 | free(wait_node); |
7972aab2 | 1834 | free(ust_cmd); |
d0b96690 DG |
1835 | continue; |
1836 | } | |
1837 | /* | |
1838 | * Add application to the wait queue so we can set the notify | |
1839 | * socket before putting this object in the global ht. | |
1840 | */ | |
f45e313d DG |
1841 | cds_list_add(&wait_node->head, &wait_queue.head); |
1842 | wait_queue.count++; | |
d0b96690 | 1843 | |
7972aab2 | 1844 | free(ust_cmd); |
d0b96690 DG |
1845 | /* |
1846 | * We have to continue here since we don't have the notify | |
1847 | * socket and the application MUST be added to the hash table | |
1848 | * only at that moment. | |
1849 | */ | |
1850 | continue; | |
1851 | } else { | |
1852 | /* | |
1853 | * Look for the application in the local wait queue and set the | |
1854 | * notify socket if found. | |
1855 | */ | |
d88aee68 | 1856 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1857 | &wait_queue.head, head) { |
12e2b881 | 1858 | health_code_update(); |
d0b96690 DG |
1859 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1860 | wait_node->app->notify_sock = ust_cmd->sock; | |
1861 | cds_list_del(&wait_node->head); | |
f45e313d | 1862 | wait_queue.count--; |
d0b96690 DG |
1863 | app = wait_node->app; |
1864 | free(wait_node); | |
1865 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1866 | break; | |
1867 | } | |
1868 | } | |
020d7f60 DG |
1869 | |
1870 | /* | |
1871 | * With no application at this stage the received socket is | |
1872 | * basically useless so close it before we free the cmd data | |
1873 | * structure for good. | |
1874 | */ | |
1875 | if (!app) { | |
1876 | ret = close(ust_cmd->sock); | |
1877 | if (ret < 0) { | |
1878 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1879 | } | |
51dec90d | 1880 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1881 | } |
7972aab2 | 1882 | free(ust_cmd); |
d0b96690 DG |
1883 | } |
1884 | ||
1885 | if (app) { | |
d0b96690 DG |
1886 | /* |
1887 | * @session_lock_list | |
1888 | * | |
1889 | * Lock the global session list so from the register up to the | |
1890 | * registration done message, no thread can see the application | |
1891 | * and change its state. | |
1892 | */ | |
1893 | session_lock_list(); | |
1894 | rcu_read_lock(); | |
d88aee68 | 1895 | |
d0b96690 DG |
1896 | /* |
1897 | * Add application to the global hash table. This needs to be | |
1898 | * done before the update to the UST registry can locate the | |
1899 | * application. | |
1900 | */ | |
1901 | ust_app_add(app); | |
d88aee68 DG |
1902 | |
1903 | /* Set app version. This call will print an error if needed. */ | |
1904 | (void) ust_app_version(app); | |
1905 | ||
1906 | /* Send notify socket through the notify pipe. */ | |
1907 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1908 | app->notify_sock); | |
1909 | if (ret < 0) { | |
1910 | rcu_read_unlock(); | |
1911 | session_unlock_list(); | |
b85dc84c DG |
1912 | /* |
1913 | * No notify thread, stop the UST tracing. However, this is | |
1914 | * not an internal error of the this thread thus setting | |
1915 | * the health error code to a normal exit. | |
1916 | */ | |
1917 | err = 0; | |
d88aee68 | 1918 | goto error; |
6620da75 | 1919 | } |
d88aee68 | 1920 | |
d0b96690 DG |
1921 | /* |
1922 | * Update newly registered application with the tracing | |
1923 | * registry info already enabled information. | |
1924 | */ | |
1925 | update_ust_app(app->sock); | |
d88aee68 DG |
1926 | |
1927 | /* | |
1928 | * Don't care about return value. Let the manage apps threads | |
1929 | * handle app unregistration upon socket close. | |
1930 | */ | |
c9d4793f | 1931 | (void) ust_app_register_done(app); |
d88aee68 DG |
1932 | |
1933 | /* | |
1934 | * Even if the application socket has been closed, send the app | |
1935 | * to the thread and unregistration will take place at that | |
1936 | * place. | |
1937 | */ | |
1938 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 1939 | if (ret < 0) { |
d88aee68 DG |
1940 | rcu_read_unlock(); |
1941 | session_unlock_list(); | |
b85dc84c DG |
1942 | /* |
1943 | * No apps. thread, stop the UST tracing. However, this is | |
1944 | * not an internal error of the this thread thus setting | |
1945 | * the health error code to a normal exit. | |
1946 | */ | |
1947 | err = 0; | |
d88aee68 | 1948 | goto error; |
d0b96690 | 1949 | } |
d88aee68 | 1950 | |
d0b96690 DG |
1951 | rcu_read_unlock(); |
1952 | session_unlock_list(); | |
099e26bd | 1953 | } |
099e26bd DG |
1954 | } while (node != NULL); |
1955 | ||
12e2b881 | 1956 | health_poll_entry(); |
099e26bd DG |
1957 | /* Futex wait on queue. Blocking call on futex() */ |
1958 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 1959 | health_poll_exit(); |
099e26bd | 1960 | } |
12e2b881 MD |
1961 | /* Normal exit, no error */ |
1962 | err = 0; | |
099e26bd DG |
1963 | |
1964 | error: | |
d88aee68 DG |
1965 | /* Clean up wait queue. */ |
1966 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 1967 | &wait_queue.head, head) { |
d88aee68 | 1968 | cds_list_del(&wait_node->head); |
f45e313d | 1969 | wait_queue.count--; |
d88aee68 DG |
1970 | free(wait_node); |
1971 | } | |
1972 | ||
b9e9de0a MD |
1973 | /* Empty command queue. */ |
1974 | for (;;) { | |
1975 | /* Dequeue command for registration */ | |
1976 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); | |
1977 | if (node == NULL) { | |
1978 | break; | |
1979 | } | |
1980 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1981 | ret = close(ust_cmd->sock); | |
1982 | if (ret < 0) { | |
1983 | PERROR("close ust sock exit dispatch %d", ust_cmd->sock); | |
1984 | } | |
1985 | lttng_fd_put(LTTNG_FD_APPS, 1); | |
1986 | free(ust_cmd); | |
1987 | } | |
1988 | ||
9ad42ec1 | 1989 | error_testpoint: |
099e26bd | 1990 | DBG("Dispatch thread dying"); |
12e2b881 MD |
1991 | if (err) { |
1992 | health_error(); | |
1993 | ERR("Health error occurred in %s", __func__); | |
1994 | } | |
8782cc74 | 1995 | health_unregister(health_sessiond); |
099e26bd DG |
1996 | return NULL; |
1997 | } | |
1998 | ||
1999 | /* | |
2000 | * This thread manage application registration. | |
2001 | */ | |
2002 | static void *thread_registration_apps(void *data) | |
1d4b027a | 2003 | { |
139ac872 | 2004 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
2005 | uint32_t revents, nb_fd; |
2006 | struct lttng_poll_event events; | |
099e26bd DG |
2007 | /* |
2008 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
2009 | * freed in the manage apps thread. | |
2010 | */ | |
2011 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 2012 | |
099e26bd | 2013 | DBG("[thread] Manage application registration started"); |
1d4b027a | 2014 | |
6c71277b | 2015 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 2016 | |
e547b070 | 2017 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
2018 | goto error_testpoint; |
2019 | } | |
8ac94142 | 2020 | |
1d4b027a DG |
2021 | ret = lttcomm_listen_unix_sock(apps_sock); |
2022 | if (ret < 0) { | |
76d7553f | 2023 | goto error_listen; |
1d4b027a DG |
2024 | } |
2025 | ||
5eb91c98 DG |
2026 | /* |
2027 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
2028 | * more will be added to this poll set. | |
2029 | */ | |
d0b96690 | 2030 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 2031 | if (ret < 0) { |
76d7553f | 2032 | goto error_create_poll; |
5eb91c98 | 2033 | } |
273ea72c | 2034 | |
5eb91c98 DG |
2035 | /* Add the application registration socket */ |
2036 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
2037 | if (ret < 0) { | |
76d7553f | 2038 | goto error_poll_add; |
5eb91c98 | 2039 | } |
273ea72c | 2040 | |
1d4b027a | 2041 | /* Notify all applications to register */ |
0fdd1e2c DG |
2042 | ret = notify_ust_apps(1); |
2043 | if (ret < 0) { | |
2044 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
2045 | "Execution continues but there might be problem for already\n" |
2046 | "running applications that wishes to register."); | |
0fdd1e2c | 2047 | } |
1d4b027a DG |
2048 | |
2049 | while (1) { | |
2050 | DBG("Accepting application registration"); | |
273ea72c DG |
2051 | |
2052 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 2053 | restart: |
a78af745 | 2054 | health_poll_entry(); |
5eb91c98 | 2055 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 2056 | health_poll_exit(); |
273ea72c | 2057 | if (ret < 0) { |
88f2b785 MD |
2058 | /* |
2059 | * Restart interrupted system call. | |
2060 | */ | |
2061 | if (errno == EINTR) { | |
2062 | goto restart; | |
2063 | } | |
273ea72c DG |
2064 | goto error; |
2065 | } | |
2066 | ||
0d9c5d77 DG |
2067 | nb_fd = ret; |
2068 | ||
5eb91c98 | 2069 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 2070 | health_code_update(); |
139ac872 | 2071 | |
5eb91c98 DG |
2072 | /* Fetch once the poll data */ |
2073 | revents = LTTNG_POLL_GETEV(&events, i); | |
2074 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 2075 | |
e0077699 MD |
2076 | if (!revents) { |
2077 | /* No activity for this FD (poll implementation). */ | |
2078 | continue; | |
2079 | } | |
2080 | ||
5eb91c98 | 2081 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 2082 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 2083 | if (ret) { |
139ac872 MD |
2084 | err = 0; |
2085 | goto exit; | |
90014c57 | 2086 | } |
1d4b027a | 2087 | |
5eb91c98 DG |
2088 | /* Event on the registration socket */ |
2089 | if (pollfd == apps_sock) { | |
584fc280 | 2090 | if (revents & LPOLLIN) { |
5eb91c98 DG |
2091 | sock = lttcomm_accept_unix_sock(apps_sock); |
2092 | if (sock < 0) { | |
2093 | goto error; | |
2094 | } | |
099e26bd | 2095 | |
16c5c8fa DG |
2096 | /* |
2097 | * Set socket timeout for both receiving and ending. | |
2098 | * app_socket_timeout is in seconds, whereas | |
2099 | * lttcomm_setsockopt_rcv_timeout and | |
2100 | * lttcomm_setsockopt_snd_timeout expect msec as | |
2101 | * parameter. | |
2102 | */ | |
2103 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
2104 | app_socket_timeout * 1000); | |
2105 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
2106 | app_socket_timeout * 1000); | |
2107 | ||
b662582b DG |
2108 | /* |
2109 | * Set the CLOEXEC flag. Return code is useless because | |
2110 | * either way, the show must go on. | |
2111 | */ | |
2112 | (void) utils_set_fd_cloexec(sock); | |
2113 | ||
5eb91c98 | 2114 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 2115 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 2116 | if (ust_cmd == NULL) { |
76d7553f | 2117 | PERROR("ust command zmalloc"); |
18441883 MD |
2118 | ret = close(sock); |
2119 | if (ret) { | |
2120 | PERROR("close"); | |
2121 | } | |
5eb91c98 DG |
2122 | goto error; |
2123 | } | |
1d4b027a | 2124 | |
5eb91c98 DG |
2125 | /* |
2126 | * Using message-based transmissions to ensure we don't | |
2127 | * have to deal with partially received messages. | |
2128 | */ | |
4063050c MD |
2129 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
2130 | if (ret < 0) { | |
2131 | ERR("Exhausted file descriptors allowed for applications."); | |
2132 | free(ust_cmd); | |
2133 | ret = close(sock); | |
2134 | if (ret) { | |
2135 | PERROR("close"); | |
2136 | } | |
2137 | sock = -1; | |
2138 | continue; | |
2139 | } | |
d88aee68 | 2140 | |
840cb59c | 2141 | health_code_update(); |
d0b96690 DG |
2142 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
2143 | if (ret < 0) { | |
5eb91c98 | 2144 | free(ust_cmd); |
d0b96690 | 2145 | /* Close socket of the application. */ |
76d7553f MD |
2146 | ret = close(sock); |
2147 | if (ret) { | |
2148 | PERROR("close"); | |
2149 | } | |
4063050c | 2150 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 2151 | sock = -1; |
5eb91c98 DG |
2152 | continue; |
2153 | } | |
840cb59c | 2154 | health_code_update(); |
099e26bd | 2155 | |
5eb91c98 | 2156 | ust_cmd->sock = sock; |
34a2494f | 2157 | sock = -1; |
099e26bd | 2158 | |
5eb91c98 DG |
2159 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2160 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2161 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2162 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2163 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2164 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2165 | |
5eb91c98 DG |
2166 | /* |
2167 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2168 | * has been taken! This apps will be part of the *system*. |
5eb91c98 | 2169 | */ |
8bdee6e2 | 2170 | cds_wfcq_enqueue(&ust_cmd_queue.head, &ust_cmd_queue.tail, &ust_cmd->node); |
5eb91c98 DG |
2171 | |
2172 | /* | |
2173 | * Wake the registration queue futex. Implicit memory | |
8bdee6e2 | 2174 | * barrier with the exchange in cds_wfcq_enqueue. |
5eb91c98 DG |
2175 | */ |
2176 | futex_nto1_wake(&ust_cmd_queue.futex); | |
584fc280 MD |
2177 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2178 | ERR("Register apps socket poll error"); | |
2179 | goto error; | |
2180 | } else { | |
2181 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2182 | goto error; | |
5eb91c98 DG |
2183 | } |
2184 | } | |
90014c57 | 2185 | } |
1d4b027a DG |
2186 | } |
2187 | ||
139ac872 | 2188 | exit: |
1d4b027a | 2189 | error: |
0fdd1e2c DG |
2190 | /* Notify that the registration thread is gone */ |
2191 | notify_ust_apps(0); | |
2192 | ||
a4b35e07 | 2193 | if (apps_sock >= 0) { |
76d7553f MD |
2194 | ret = close(apps_sock); |
2195 | if (ret) { | |
2196 | PERROR("close"); | |
2197 | } | |
a4b35e07 | 2198 | } |
46c3f085 | 2199 | if (sock >= 0) { |
76d7553f MD |
2200 | ret = close(sock); |
2201 | if (ret) { | |
2202 | PERROR("close"); | |
2203 | } | |
4063050c | 2204 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2205 | } |
273ea72c | 2206 | unlink(apps_unix_sock_path); |
0fdd1e2c | 2207 | |
76d7553f | 2208 | error_poll_add: |
5eb91c98 | 2209 | lttng_poll_clean(&events); |
76d7553f MD |
2210 | error_listen: |
2211 | error_create_poll: | |
6993eeb3 | 2212 | error_testpoint: |
76d7553f | 2213 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2214 | if (err) { |
2215 | health_error(); | |
2216 | ERR("Health error occurred in %s", __func__); | |
2217 | } | |
8782cc74 | 2218 | health_unregister(health_sessiond); |
5eb91c98 | 2219 | |
1d4b027a DG |
2220 | return NULL; |
2221 | } | |
2222 | ||
8c0faa1d | 2223 | /* |
3bd1e081 | 2224 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2225 | * exec or it will fails. |
8c0faa1d | 2226 | */ |
3bd1e081 | 2227 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2228 | { |
a23ec3a7 | 2229 | int ret, clock_ret; |
ee0b0061 DG |
2230 | struct timespec timeout; |
2231 | ||
a23ec3a7 DG |
2232 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
2233 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 2234 | |
a23ec3a7 DG |
2235 | /* Setup pthread condition */ |
2236 | ret = pthread_condattr_init(&consumer_data->condattr); | |
2237 | if (ret != 0) { | |
2238 | errno = ret; | |
2239 | PERROR("pthread_condattr_init consumer data"); | |
2240 | goto error; | |
2241 | } | |
2242 | ||
2243 | /* | |
2244 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2245 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2246 | * for a more details and how we noticed it. | |
2247 | */ | |
2248 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
2249 | if (ret != 0) { | |
2250 | errno = ret; | |
2251 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2252 | goto error; |
2253 | } | |
8c0faa1d | 2254 | |
a23ec3a7 DG |
2255 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
2256 | if (ret != 0) { | |
2257 | errno = ret; | |
2258 | PERROR("pthread_cond_init consumer data"); | |
2259 | goto error; | |
2260 | } | |
2261 | ||
2262 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
2263 | consumer_data); | |
8c0faa1d | 2264 | if (ret != 0) { |
3bd1e081 | 2265 | PERROR("pthread_create consumer"); |
ee0b0061 | 2266 | ret = -1; |
8c0faa1d DG |
2267 | goto error; |
2268 | } | |
2269 | ||
a23ec3a7 DG |
2270 | /* We are about to wait on a pthread condition */ |
2271 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2272 | ||
ee0b0061 | 2273 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
2274 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
2275 | /* | |
2276 | * Set the timeout for the condition timed wait even if the clock gettime | |
2277 | * call fails since we might loop on that call and we want to avoid to | |
2278 | * increment the timeout too many times. | |
2279 | */ | |
2280 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2281 | ||
2282 | /* | |
2283 | * The following loop COULD be skipped in some conditions so this is why we | |
2284 | * set ret to 0 in order to make sure at least one round of the loop is | |
2285 | * done. | |
2286 | */ | |
2287 | ret = 0; | |
2288 | ||
2289 | /* | |
2290 | * Loop until the condition is reached or when a timeout is reached. Note | |
2291 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2292 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2293 | * possible. This loop does not take any chances and works with both of | |
2294 | * them. | |
2295 | */ | |
2296 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2297 | if (clock_ret < 0) { | |
2298 | PERROR("clock_gettime spawn consumer"); | |
2299 | /* Infinite wait for the consumerd thread to be ready */ | |
2300 | ret = pthread_cond_wait(&consumer_data->cond, | |
2301 | &consumer_data->cond_mutex); | |
2302 | } else { | |
2303 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2304 | &consumer_data->cond_mutex, &timeout); | |
2305 | } | |
ee0b0061 | 2306 | } |
8c0faa1d | 2307 | |
a23ec3a7 DG |
2308 | /* Release the pthread condition */ |
2309 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2310 | ||
2311 | if (ret != 0) { | |
2312 | errno = ret; | |
2313 | if (ret == ETIMEDOUT) { | |
4282f9a3 DG |
2314 | int pth_ret; |
2315 | ||
ee0b0061 DG |
2316 | /* |
2317 | * Call has timed out so we kill the kconsumerd_thread and return | |
2318 | * an error. | |
2319 | */ | |
a23ec3a7 DG |
2320 | ERR("Condition timed out. The consumer thread was never ready." |
2321 | " Killing it"); | |
4282f9a3 DG |
2322 | pth_ret = pthread_cancel(consumer_data->thread); |
2323 | if (pth_ret < 0) { | |
3bd1e081 | 2324 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2325 | } |
2326 | } else { | |
a23ec3a7 | 2327 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 | 2328 | } |
4282f9a3 DG |
2329 | /* Caller is expecting a negative value on failure. */ |
2330 | ret = -1; | |
ee0b0061 DG |
2331 | goto error; |
2332 | } | |
2333 | ||
3bd1e081 MD |
2334 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2335 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2336 | ERR("Consumerd did not start"); |
3bd1e081 | 2337 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2338 | goto error; |
2339 | } | |
3bd1e081 | 2340 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2341 | |
8c0faa1d DG |
2342 | return 0; |
2343 | ||
2344 | error: | |
2345 | return ret; | |
2346 | } | |
2347 | ||
d9800920 | 2348 | /* |
3bd1e081 | 2349 | * Join consumer thread |
d9800920 | 2350 | */ |
3bd1e081 | 2351 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2352 | { |
2353 | void *status; | |
cf3af59e | 2354 | |
e8209f6b DG |
2355 | /* Consumer pid must be a real one. */ |
2356 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2357 | int ret; |
3bd1e081 | 2358 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2359 | if (ret) { |
3bd1e081 | 2360 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
2361 | return ret; |
2362 | } | |
3bd1e081 | 2363 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2364 | } else { |
2365 | return 0; | |
2366 | } | |
2367 | } | |
2368 | ||
8c0faa1d | 2369 | /* |
3bd1e081 | 2370 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2371 | * |
d063d709 | 2372 | * Return pid if successful else -1. |
8c0faa1d | 2373 | */ |
3bd1e081 | 2374 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2375 | { |
2376 | int ret; | |
2377 | pid_t pid; | |
94c55f17 | 2378 | const char *consumer_to_use; |
53086306 | 2379 | const char *verbosity; |
94c55f17 | 2380 | struct stat st; |
8c0faa1d | 2381 | |
3bd1e081 | 2382 | DBG("Spawning consumerd"); |
c49dc785 | 2383 | |
8c0faa1d DG |
2384 | pid = fork(); |
2385 | if (pid == 0) { | |
2386 | /* | |
3bd1e081 | 2387 | * Exec consumerd. |
8c0faa1d | 2388 | */ |
daee5345 | 2389 | if (opt_verbose_consumer) { |
53086306 | 2390 | verbosity = "--verbose"; |
4421f712 | 2391 | } else if (lttng_opt_quiet) { |
53086306 | 2392 | verbosity = "--quiet"; |
4421f712 DG |
2393 | } else { |
2394 | verbosity = ""; | |
53086306 | 2395 | } |
4421f712 | 2396 | |
3bd1e081 MD |
2397 | switch (consumer_data->type) { |
2398 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2399 | /* |
c7704d57 DG |
2400 | * Find out which consumerd to execute. We will first try the |
2401 | * 64-bit path, then the sessiond's installation directory, and | |
2402 | * fallback on the 32-bit one, | |
94c55f17 | 2403 | */ |
63a799e8 AM |
2404 | DBG3("Looking for a kernel consumer at these locations:"); |
2405 | DBG3(" 1) %s", consumerd64_bin); | |
2406 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
2407 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 2408 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 2409 | DBG3("Found location #1"); |
94c55f17 | 2410 | consumer_to_use = consumerd64_bin; |
94c55f17 | 2411 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 2412 | DBG3("Found location #2"); |
94c55f17 | 2413 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 2414 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 2415 | DBG3("Found location #3"); |
eb1e0bd4 | 2416 | consumer_to_use = consumerd32_bin; |
94c55f17 | 2417 | } else { |
63a799e8 | 2418 | DBG("Could not find any valid consumerd executable"); |
4282f9a3 | 2419 | ret = -EINVAL; |
94c55f17 AM |
2420 | break; |
2421 | } | |
2422 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
4282f9a3 | 2423 | ret = execl(consumer_to_use, |
94c55f17 AM |
2424 | "lttng-consumerd", verbosity, "-k", |
2425 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2426 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2427 | "--group", tracing_group_name, |
94c55f17 | 2428 | NULL); |
3bd1e081 | 2429 | break; |
7753dea8 MD |
2430 | case LTTNG_CONSUMER64_UST: |
2431 | { | |
b1e0b6b6 | 2432 | char *tmpnew = NULL; |
8f4905da MD |
2433 | |
2434 | if (consumerd64_libdir[0] != '\0') { | |
2435 | char *tmp; | |
2436 | size_t tmplen; | |
2437 | ||
2438 | tmp = getenv("LD_LIBRARY_PATH"); | |
2439 | if (!tmp) { | |
2440 | tmp = ""; | |
2441 | } | |
2442 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2443 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
2444 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2445 | if (!tmpnew) { | |
2446 | ret = -ENOMEM; | |
2447 | goto error; | |
2448 | } | |
2449 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2450 | strcat(tmpnew, consumerd64_libdir); | |
2451 | if (tmp[0] != '\0') { | |
2452 | strcat(tmpnew, ":"); | |
2453 | strcat(tmpnew, tmp); | |
2454 | } | |
2455 | ret = putenv(tmpnew); | |
2456 | if (ret) { | |
2457 | ret = -errno; | |
c6f76da9 | 2458 | free(tmpnew); |
8f4905da MD |
2459 | goto error; |
2460 | } | |
2461 | } | |
94c55f17 | 2462 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 2463 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2464 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2465 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2466 | "--group", tracing_group_name, |
7753dea8 | 2467 | NULL); |
8f4905da MD |
2468 | if (consumerd64_libdir[0] != '\0') { |
2469 | free(tmpnew); | |
2470 | } | |
3bd1e081 | 2471 | break; |
7753dea8 MD |
2472 | } |
2473 | case LTTNG_CONSUMER32_UST: | |
2474 | { | |
937dde8e | 2475 | char *tmpnew = NULL; |
8f4905da MD |
2476 | |
2477 | if (consumerd32_libdir[0] != '\0') { | |
2478 | char *tmp; | |
2479 | size_t tmplen; | |
2480 | ||
2481 | tmp = getenv("LD_LIBRARY_PATH"); | |
2482 | if (!tmp) { | |
2483 | tmp = ""; | |
2484 | } | |
2485 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2486 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2487 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2488 | if (!tmpnew) { | |
2489 | ret = -ENOMEM; | |
2490 | goto error; | |
2491 | } | |
2492 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2493 | strcat(tmpnew, consumerd32_libdir); | |
2494 | if (tmp[0] != '\0') { | |
2495 | strcat(tmpnew, ":"); | |
2496 | strcat(tmpnew, tmp); | |
2497 | } | |
2498 | ret = putenv(tmpnew); | |
2499 | if (ret) { | |
2500 | ret = -errno; | |
c6f76da9 | 2501 | free(tmpnew); |
8f4905da MD |
2502 | goto error; |
2503 | } | |
2504 | } | |
94c55f17 | 2505 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 2506 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2507 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2508 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2509 | "--group", tracing_group_name, |
7753dea8 | 2510 | NULL); |
8f4905da MD |
2511 | if (consumerd32_libdir[0] != '\0') { |
2512 | free(tmpnew); | |
2513 | } | |
7753dea8 MD |
2514 | break; |
2515 | } | |
3bd1e081 | 2516 | default: |
76d7553f | 2517 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2518 | exit(EXIT_FAILURE); |
2519 | } | |
8c0faa1d | 2520 | if (errno != 0) { |
4282f9a3 | 2521 | PERROR("Consumer execl()"); |
8c0faa1d | 2522 | } |
4282f9a3 | 2523 | /* Reaching this point, we got a failure on our execl(). */ |
8c0faa1d DG |
2524 | exit(EXIT_FAILURE); |
2525 | } else if (pid > 0) { | |
2526 | ret = pid; | |
8c0faa1d | 2527 | } else { |
76d7553f | 2528 | PERROR("start consumer fork"); |
8c0faa1d | 2529 | ret = -errno; |
8c0faa1d | 2530 | } |
8f4905da | 2531 | error: |
8c0faa1d DG |
2532 | return ret; |
2533 | } | |
2534 | ||
693bd40b | 2535 | /* |
3bd1e081 | 2536 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2537 | */ |
3bd1e081 | 2538 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2539 | { |
c617c0c6 | 2540 | int ret; |
edb8b045 DG |
2541 | |
2542 | /* | |
2543 | * Set the listen() state on the socket since there is a possible race | |
2544 | * between the exec() of the consumer daemon and this call if place in the | |
2545 | * consumer thread. See bug #366 for more details. | |
2546 | */ | |
2547 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2548 | if (ret < 0) { | |
2549 | goto error; | |
2550 | } | |
693bd40b | 2551 | |
3bd1e081 MD |
2552 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2553 | if (consumer_data->pid != 0) { | |
2554 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2555 | goto end; |
2556 | } | |
693bd40b | 2557 | |
3bd1e081 | 2558 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2559 | if (ret < 0) { |
3bd1e081 MD |
2560 | ERR("Spawning consumerd failed"); |
2561 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2562 | goto error; |
693bd40b | 2563 | } |
c49dc785 | 2564 | |
3bd1e081 MD |
2565 | /* Setting up the consumer_data pid */ |
2566 | consumer_data->pid = ret; | |
48842b30 | 2567 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2568 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2569 | |
3bd1e081 MD |
2570 | DBG2("Spawning consumer control thread"); |
2571 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2572 | if (ret < 0) { |
3bd1e081 | 2573 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2574 | goto error; |
2575 | } | |
2576 | ||
c49dc785 | 2577 | end: |
693bd40b DG |
2578 | return 0; |
2579 | ||
2580 | error: | |
331744e3 | 2581 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2582 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2583 | int err; |
2584 | ||
edb8b045 DG |
2585 | err = close(consumer_data->err_sock); |
2586 | if (err < 0) { | |
2587 | PERROR("close consumer data error socket"); | |
2588 | } | |
2589 | } | |
693bd40b DG |
2590 | return ret; |
2591 | } | |
2592 | ||
b73401da | 2593 | /* |
096102bd | 2594 | * Setup necessary data for kernel tracer action. |
b73401da | 2595 | */ |
096102bd | 2596 | static int init_kernel_tracer(void) |
b73401da DG |
2597 | { |
2598 | int ret; | |
b73401da | 2599 | |
096102bd DG |
2600 | /* Modprobe lttng kernel modules */ |
2601 | ret = modprobe_lttng_control(); | |
b73401da | 2602 | if (ret < 0) { |
b73401da DG |
2603 | goto error; |
2604 | } | |
2605 | ||
096102bd DG |
2606 | /* Open debugfs lttng */ |
2607 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2608 | if (kernel_tracer_fd < 0) { | |
2609 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
2610 | ret = -1; |
2611 | goto error_open; | |
54d01ffb DG |
2612 | } |
2613 | ||
2f77fc4b DG |
2614 | /* Validate kernel version */ |
2615 | ret = kernel_validate_version(kernel_tracer_fd); | |
2616 | if (ret < 0) { | |
2617 | goto error_version; | |
b551a063 | 2618 | } |
54d01ffb | 2619 | |
2f77fc4b DG |
2620 | ret = modprobe_lttng_data(); |
2621 | if (ret < 0) { | |
2622 | goto error_modules; | |
54d01ffb DG |
2623 | } |
2624 | ||
2f77fc4b DG |
2625 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2626 | return 0; | |
2627 | ||
2628 | error_version: | |
2629 | modprobe_remove_lttng_control(); | |
2630 | ret = close(kernel_tracer_fd); | |
2631 | if (ret) { | |
2632 | PERROR("close"); | |
b551a063 | 2633 | } |
2f77fc4b | 2634 | kernel_tracer_fd = -1; |
f73fabfd | 2635 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2636 | |
2f77fc4b DG |
2637 | error_modules: |
2638 | ret = close(kernel_tracer_fd); | |
2639 | if (ret) { | |
2640 | PERROR("close"); | |
b551a063 | 2641 | } |
54d01ffb | 2642 | |
2f77fc4b DG |
2643 | error_open: |
2644 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2645 | |
2646 | error: | |
2f77fc4b DG |
2647 | WARN("No kernel tracer available"); |
2648 | kernel_tracer_fd = -1; | |
2649 | if (!is_root) { | |
f73fabfd | 2650 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2651 | } else { |
f73fabfd | 2652 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2653 | } |
54d01ffb DG |
2654 | } |
2655 | ||
2f77fc4b | 2656 | |
54d01ffb | 2657 | /* |
2f77fc4b DG |
2658 | * Copy consumer output from the tracing session to the domain session. The |
2659 | * function also applies the right modification on a per domain basis for the | |
2660 | * trace files destination directory. | |
36b588ed MD |
2661 | * |
2662 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2663 | */ |
2f77fc4b | 2664 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2665 | { |
2666 | int ret; | |
2f77fc4b DG |
2667 | const char *dir_name; |
2668 | struct consumer_output *consumer; | |
2669 | ||
2670 | assert(session); | |
2671 | assert(session->consumer); | |
54d01ffb | 2672 | |
b551a063 DG |
2673 | switch (domain) { |
2674 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2675 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2676 | /* |
2677 | * XXX: We should audit the session creation and what this function | |
2678 | * does "extra" in order to avoid a destroy since this function is used | |
2679 | * in the domain session creation (kernel and ust) only. Same for UST | |
2680 | * domain. | |
2681 | */ | |
2682 | if (session->kernel_session->consumer) { | |
7ec4dd5a | 2683 | consumer_output_put(session->kernel_session->consumer); |
09a90bcd | 2684 | } |
2f77fc4b DG |
2685 | session->kernel_session->consumer = |
2686 | consumer_copy_output(session->consumer); | |
2687 | /* Ease our life a bit for the next part */ | |
2688 | consumer = session->kernel_session->consumer; | |
2689 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2690 | break; |
f20baf8e | 2691 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2692 | case LTTNG_DOMAIN_LOG4J: |
b551a063 | 2693 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2694 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd | 2695 | if (session->ust_session->consumer) { |
7ec4dd5a | 2696 | consumer_output_put(session->ust_session->consumer); |
09a90bcd | 2697 | } |
2f77fc4b DG |
2698 | session->ust_session->consumer = |
2699 | consumer_copy_output(session->consumer); | |
2700 | /* Ease our life a bit for the next part */ | |
2701 | consumer = session->ust_session->consumer; | |
2702 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2703 | break; |
2704 | default: | |
f73fabfd | 2705 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2706 | goto error; |
2707 | } | |
2708 | ||
2f77fc4b | 2709 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2710 | strncat(consumer->subdir, dir_name, |
2711 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2712 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2713 | ||
f73fabfd | 2714 | ret = LTTNG_OK; |
54d01ffb DG |
2715 | |
2716 | error: | |
2717 | return ret; | |
2718 | } | |
2719 | ||
00e2e675 | 2720 | /* |
2f77fc4b | 2721 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2722 | * |
2723 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2724 | */ |
2f77fc4b DG |
2725 | static int create_ust_session(struct ltt_session *session, |
2726 | struct lttng_domain *domain) | |
00e2e675 DG |
2727 | { |
2728 | int ret; | |
2f77fc4b | 2729 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2730 | |
a4b92340 | 2731 | assert(session); |
2f77fc4b DG |
2732 | assert(domain); |
2733 | assert(session->consumer); | |
a4b92340 | 2734 | |
2f77fc4b | 2735 | switch (domain->type) { |
f20baf8e | 2736 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2737 | case LTTNG_DOMAIN_LOG4J: |
2f77fc4b DG |
2738 | case LTTNG_DOMAIN_UST: |
2739 | break; | |
2740 | default: | |
2741 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2742 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2743 | goto error; |
2744 | } | |
2745 | ||
2f77fc4b DG |
2746 | DBG("Creating UST session"); |
2747 | ||
dec56f6c | 2748 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2749 | if (lus == NULL) { |
f73fabfd | 2750 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2751 | goto error; |
2752 | } | |
2753 | ||
2f77fc4b DG |
2754 | lus->uid = session->uid; |
2755 | lus->gid = session->gid; | |
2bba9e53 | 2756 | lus->output_traces = session->output_traces; |
27babd3a | 2757 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2758 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2759 | session->ust_session = lus; |
00e2e675 | 2760 | |
2f77fc4b DG |
2761 | /* Copy session output to the newly created UST session */ |
2762 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2763 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2764 | goto error; |
2765 | } | |
2766 | ||
f73fabfd | 2767 | return LTTNG_OK; |
00e2e675 DG |
2768 | |
2769 | error: | |
2f77fc4b DG |
2770 | free(lus); |
2771 | session->ust_session = NULL; | |
00e2e675 DG |
2772 | return ret; |
2773 | } | |
2774 | ||
2775 | /* | |
2f77fc4b | 2776 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2777 | */ |
2f77fc4b | 2778 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2779 | { |
2780 | int ret; | |
a4b92340 | 2781 | |
2f77fc4b | 2782 | DBG("Creating kernel session"); |
00e2e675 | 2783 | |
2f77fc4b DG |
2784 | ret = kernel_create_session(session, kernel_tracer_fd); |
2785 | if (ret < 0) { | |
f73fabfd | 2786 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2787 | goto error; |
2788 | } | |
2789 | ||
2f77fc4b DG |
2790 | /* Code flow safety */ |
2791 | assert(session->kernel_session); | |
2792 | ||
2793 | /* Copy session output to the newly created Kernel session */ | |
2794 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2795 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2796 | goto error; |
2797 | } | |
2798 | ||
2f77fc4b DG |
2799 | /* Create directory(ies) on local filesystem. */ |
2800 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2801 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2802 | ret = run_as_mkdir_recursive( | |
2803 | session->kernel_session->consumer->dst.trace_path, | |
2804 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2805 | if (ret < 0) { | |
4ffbac14 | 2806 | if (errno != EEXIST) { |
2f77fc4b | 2807 | ERR("Trace directory creation error"); |
00e2e675 DG |
2808 | goto error; |
2809 | } | |
00e2e675 | 2810 | } |
2f77fc4b | 2811 | } |
00e2e675 | 2812 | |
2f77fc4b DG |
2813 | session->kernel_session->uid = session->uid; |
2814 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2815 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2816 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2817 | |
f73fabfd | 2818 | return LTTNG_OK; |
00e2e675 | 2819 | |
2f77fc4b DG |
2820 | error: |
2821 | trace_kernel_destroy_session(session->kernel_session); | |
2822 | session->kernel_session = NULL; | |
2823 | return ret; | |
2824 | } | |
00e2e675 | 2825 | |
2f77fc4b DG |
2826 | /* |
2827 | * Count number of session permitted by uid/gid. | |
2828 | */ | |
2829 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2830 | { | |
2831 | unsigned int i = 0; | |
2832 | struct ltt_session *session; | |
07424f16 | 2833 | |
2f77fc4b DG |
2834 | DBG("Counting number of available session for UID %d GID %d", |
2835 | uid, gid); | |
2836 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2837 | /* |
2f77fc4b | 2838 | * Only list the sessions the user can control. |
00e2e675 | 2839 | */ |
2f77fc4b DG |
2840 | if (!session_access_ok(session, uid, gid)) { |
2841 | continue; | |
2842 | } | |
2843 | i++; | |
a4b92340 | 2844 | } |
2f77fc4b | 2845 | return i; |
00e2e675 DG |
2846 | } |
2847 | ||
54d01ffb DG |
2848 | /* |
2849 | * Process the command requested by the lttng client within the command | |
2850 | * context structure. This function make sure that the return structure (llm) | |
2851 | * is set and ready for transmission before returning. | |
2852 | * | |
2853 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2854 | * |
2855 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2856 | * |
2857 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2858 | */ |
53a80697 MD |
2859 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2860 | int *sock_error) | |
54d01ffb | 2861 | { |
f73fabfd | 2862 | int ret = LTTNG_OK; |
44d3bd01 | 2863 | int need_tracing_session = 1; |
2e09ba09 | 2864 | int need_domain; |
54d01ffb DG |
2865 | |
2866 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2867 | ||
53a80697 MD |
2868 | *sock_error = 0; |
2869 | ||
2e09ba09 MD |
2870 | switch (cmd_ctx->lsm->cmd_type) { |
2871 | case LTTNG_CREATE_SESSION: | |
27babd3a | 2872 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2873 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
2874 | case LTTNG_DESTROY_SESSION: |
2875 | case LTTNG_LIST_SESSIONS: | |
2876 | case LTTNG_LIST_DOMAINS: | |
2877 | case LTTNG_START_TRACE: | |
2878 | case LTTNG_STOP_TRACE: | |
6d805429 | 2879 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2880 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2881 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2882 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2883 | case LTTNG_SNAPSHOT_RECORD: | |
fb198a11 | 2884 | case LTTNG_SAVE_SESSION: |
2e09ba09 | 2885 | need_domain = 0; |
3aace903 | 2886 | break; |
2e09ba09 MD |
2887 | default: |
2888 | need_domain = 1; | |
2889 | } | |
2890 | ||
2891 | if (opt_no_kernel && need_domain | |
2892 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2893 | if (!is_root) { |
f73fabfd | 2894 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2895 | } else { |
f73fabfd | 2896 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2897 | } |
4fba7219 DG |
2898 | goto error; |
2899 | } | |
2900 | ||
8d3113b2 DG |
2901 | /* Deny register consumer if we already have a spawned consumer. */ |
2902 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2903 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2904 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2905 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2906 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2907 | goto error; |
2908 | } | |
2909 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2910 | } | |
2911 | ||
54d01ffb DG |
2912 | /* |
2913 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2914 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2915 | * command. |
2916 | */ | |
2917 | switch(cmd_ctx->lsm->cmd_type) { | |
2918 | case LTTNG_LIST_SESSIONS: | |
2919 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2920 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2921 | case LTTNG_LIST_DOMAINS: |
2922 | case LTTNG_LIST_CHANNELS: | |
2923 | case LTTNG_LIST_EVENTS: | |
834978fd | 2924 | case LTTNG_LIST_SYSCALLS: |
54d01ffb DG |
2925 | break; |
2926 | default: | |
2927 | /* Setup lttng message with no payload */ | |
2928 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2929 | if (ret < 0) { | |
2930 | /* This label does not try to unlock the session */ | |
2931 | goto init_setup_error; | |
2932 | } | |
2933 | } | |
2934 | ||
2935 | /* Commands that DO NOT need a session. */ | |
2936 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2937 | case LTTNG_CREATE_SESSION: |
27babd3a | 2938 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2939 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 | 2940 | case LTTNG_CALIBRATE: |
54d01ffb DG |
2941 | case LTTNG_LIST_SESSIONS: |
2942 | case LTTNG_LIST_TRACEPOINTS: | |
834978fd | 2943 | case LTTNG_LIST_SYSCALLS: |
f37d259d | 2944 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
fb198a11 | 2945 | case LTTNG_SAVE_SESSION: |
44d3bd01 | 2946 | need_tracing_session = 0; |
54d01ffb DG |
2947 | break; |
2948 | default: | |
2949 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
2950 | /* |
2951 | * We keep the session list lock across _all_ commands | |
2952 | * for now, because the per-session lock does not | |
2953 | * handle teardown properly. | |
2954 | */ | |
74babd95 | 2955 | session_lock_list(); |
54d01ffb DG |
2956 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
2957 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 2958 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
2959 | goto error; |
2960 | } else { | |
2961 | /* Acquire lock for the session */ | |
2962 | session_lock(cmd_ctx->session); | |
2963 | } | |
2964 | break; | |
2965 | } | |
b389abbe | 2966 | |
5f3ecf22 DG |
2967 | /* |
2968 | * Commands that need a valid session but should NOT create one if none | |
2969 | * exists. Instead of creating one and destroying it when the command is | |
2970 | * handled, process that right before so we save some round trip in useless | |
2971 | * code path. | |
2972 | */ | |
2973 | switch (cmd_ctx->lsm->cmd_type) { | |
2974 | case LTTNG_DISABLE_CHANNEL: | |
2975 | case LTTNG_DISABLE_EVENT: | |
5f3ecf22 DG |
2976 | switch (cmd_ctx->lsm->domain.type) { |
2977 | case LTTNG_DOMAIN_KERNEL: | |
2978 | if (!cmd_ctx->session->kernel_session) { | |
2979 | ret = LTTNG_ERR_NO_CHANNEL; | |
2980 | goto error; | |
2981 | } | |
2982 | break; | |
2983 | case LTTNG_DOMAIN_JUL: | |
5cdb6027 | 2984 | case LTTNG_DOMAIN_LOG4J: |
5f3ecf22 DG |
2985 | case LTTNG_DOMAIN_UST: |
2986 | if (!cmd_ctx->session->ust_session) { | |
2987 | ret = LTTNG_ERR_NO_CHANNEL; | |
2988 | goto error; | |
2989 | } | |
2990 | break; | |
2991 | default: | |
2992 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
2993 | goto error; | |
2994 | } | |
2995 | default: | |
2996 | break; | |
2997 | } | |
2998 | ||
2e09ba09 MD |
2999 | if (!need_domain) { |
3000 | goto skip_domain; | |
3001 | } | |
a4b92340 | 3002 | |
54d01ffb DG |
3003 | /* |
3004 | * Check domain type for specific "pre-action". | |
3005 | */ | |
3006 | switch (cmd_ctx->lsm->domain.type) { | |
3007 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 3008 | if (!is_root) { |
f73fabfd | 3009 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
3010 | goto error; |
3011 | } | |
3012 | ||
54d01ffb | 3013 | /* Kernel tracer check */ |
a4b35e07 | 3014 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3015 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3016 | ret = init_kernel_tracer(); |
3017 | if (ret != 0) { | |
54d01ffb DG |
3018 | goto error; |
3019 | } | |
3020 | } | |
5eb91c98 | 3021 | |
5c827ce0 DG |
3022 | /* Consumer is in an ERROR state. Report back to client */ |
3023 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3024 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3025 | goto error; |
3026 | } | |
3027 | ||
54d01ffb | 3028 | /* Need a session for kernel command */ |
44d3bd01 | 3029 | if (need_tracing_session) { |
54d01ffb | 3030 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3031 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3032 | if (ret < 0) { |
f73fabfd | 3033 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
3034 | goto error; |
3035 | } | |
b389abbe | 3036 | } |
7d29a247 | 3037 | |
54d01ffb | 3038 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3039 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3040 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 3041 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3042 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3043 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3044 | if (ret < 0) { |
f73fabfd | 3045 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 3046 | goto error; |
950131af | 3047 | } |
5c827ce0 | 3048 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
3049 | } else { |
3050 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3051 | } |
173af62f | 3052 | |
a4b92340 DG |
3053 | /* |
3054 | * The consumer was just spawned so we need to add the socket to | |
3055 | * the consumer output of the session if exist. | |
3056 | */ | |
3057 | ret = consumer_create_socket(&kconsumer_data, | |
3058 | cmd_ctx->session->kernel_session->consumer); | |
3059 | if (ret < 0) { | |
3060 | goto error; | |
173af62f | 3061 | } |
0d0c377a | 3062 | } |
5c827ce0 | 3063 | |
54d01ffb | 3064 | break; |
b9dfb167 | 3065 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3066 | case LTTNG_DOMAIN_LOG4J: |
2bdd86d4 | 3067 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3068 | { |
b51ec5b4 MD |
3069 | if (!ust_app_supported()) { |
3070 | ret = LTTNG_ERR_NO_UST; | |
3071 | goto error; | |
3072 | } | |
5c827ce0 DG |
3073 | /* Consumer is in an ERROR state. Report back to client */ |
3074 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3075 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3076 | goto error; |
3077 | } | |
3078 | ||
44d3bd01 | 3079 | if (need_tracing_session) { |
a4b92340 | 3080 | /* Create UST session if none exist. */ |
f6a9efaa | 3081 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3082 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3083 | &cmd_ctx->lsm->domain); |
f73fabfd | 3084 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
3085 | goto error; |
3086 | } | |
3087 | } | |
00e2e675 | 3088 | |
7753dea8 MD |
3089 | /* Start the UST consumer daemons */ |
3090 | /* 64-bit */ | |
3091 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 3092 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 3093 | ustconsumer64_data.pid == 0 && |
785d2d0d | 3094 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3095 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3096 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3097 | if (ret < 0) { |
f73fabfd | 3098 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 3099 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
3100 | goto error; |
3101 | } | |
48842b30 | 3102 | |
173af62f | 3103 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 3104 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3105 | } else { |
7753dea8 MD |
3106 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3107 | } | |
173af62f DG |
3108 | |
3109 | /* | |
3110 | * Setup socket for consumer 64 bit. No need for atomic access | |
3111 | * since it was set above and can ONLY be set in this thread. | |
3112 | */ | |
a4b92340 DG |
3113 | ret = consumer_create_socket(&ustconsumer64_data, |
3114 | cmd_ctx->session->ust_session->consumer); | |
3115 | if (ret < 0) { | |
3116 | goto error; | |
173af62f DG |
3117 | } |
3118 | ||
7753dea8 | 3119 | /* 32-bit */ |
385b881b | 3120 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); |
fc7a59ce | 3121 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 3122 | ustconsumer32_data.pid == 0 && |
785d2d0d | 3123 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3124 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
3125 | ret = start_consumerd(&ustconsumer32_data); | |
3126 | if (ret < 0) { | |
f73fabfd | 3127 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 3128 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
3129 | goto error; |
3130 | } | |
5c827ce0 | 3131 | |
173af62f | 3132 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 3133 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3134 | } else { |
3135 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3136 | } |
173af62f DG |
3137 | |
3138 | /* | |
3139 | * Setup socket for consumer 64 bit. No need for atomic access | |
3140 | * since it was set above and can ONLY be set in this thread. | |
3141 | */ | |
a4b92340 DG |
3142 | ret = consumer_create_socket(&ustconsumer32_data, |
3143 | cmd_ctx->session->ust_session->consumer); | |
3144 | if (ret < 0) { | |
3145 | goto error; | |
173af62f | 3146 | } |
44d3bd01 DG |
3147 | } |
3148 | break; | |
48842b30 | 3149 | } |
54d01ffb | 3150 | default: |
54d01ffb DG |
3151 | break; |
3152 | } | |
2e09ba09 | 3153 | skip_domain: |
33a2b854 | 3154 | |
5c827ce0 DG |
3155 | /* Validate consumer daemon state when start/stop trace command */ |
3156 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3157 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3158 | switch (cmd_ctx->lsm->domain.type) { | |
b9dfb167 | 3159 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3160 | case LTTNG_DOMAIN_LOG4J: |
5c827ce0 DG |
3161 | case LTTNG_DOMAIN_UST: |
3162 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3163 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3164 | goto error; |
3165 | } | |
3166 | break; | |
3167 | case LTTNG_DOMAIN_KERNEL: | |
3168 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3169 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3170 | goto error; |
3171 | } | |
3172 | break; | |
3173 | } | |
3174 | } | |
3175 | ||
8e0af1b4 MD |
3176 | /* |
3177 | * Check that the UID or GID match that of the tracing session. | |
3178 | * The root user can interact with all sessions. | |
3179 | */ | |
3180 | if (need_tracing_session) { | |
3181 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3182 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3183 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 3184 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
3185 | goto error; |
3186 | } | |
3187 | } | |
3188 | ||
ffe60014 DG |
3189 | /* |
3190 | * Send relayd information to consumer as soon as we have a domain and a | |
3191 | * session defined. | |
3192 | */ | |
3193 | if (cmd_ctx->session && need_domain) { | |
3194 | /* | |
3195 | * Setup relayd if not done yet. If the relayd information was already | |
3196 | * sent to the consumer, this call will gracefully return. | |
3197 | */ | |
3198 | ret = cmd_setup_relayd(cmd_ctx->session); | |
3199 | if (ret != LTTNG_OK) { | |
3200 | goto error; | |
3201 | } | |
3202 | } | |
3203 | ||
54d01ffb DG |
3204 | /* Process by command type */ |
3205 | switch (cmd_ctx->lsm->cmd_type) { | |
3206 | case LTTNG_ADD_CONTEXT: | |
3207 | { | |
3208 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3209 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 3210 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
3211 | break; |
3212 | } | |
3213 | case LTTNG_DISABLE_CHANNEL: | |
3214 | { | |
3215 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3216 | cmd_ctx->lsm->u.disable.channel_name); | |
3217 | break; | |
3218 | } | |
3219 | case LTTNG_DISABLE_EVENT: | |
3220 | { | |
abfab6f8 JG |
3221 | |
3222 | /* | |
3223 | * FIXME: handle filter; for now we just receive the filter's | |
3224 | * bytecode along with the filter expression which are sent by | |
3225 | * liblttng-ctl and discard them. | |
3226 | * | |
3227 | * This fixes an issue where the client may block while sending | |
3228 | * the filter payload and encounter an error because the session | |
3229 | * daemon closes the socket without ever handling this data. | |
3230 | */ | |
3231 | size_t count = cmd_ctx->lsm->u.disable.expression_len + | |
3232 | cmd_ctx->lsm->u.disable.bytecode_len; | |
3233 | ||
3234 | if (count) { | |
3235 | char data[LTTNG_FILTER_MAX_LEN]; | |
3236 | ||
3237 | DBG("Discarding disable event command payload of size %zu", count); | |
3238 | while (count) { | |
3239 | ret = lttcomm_recv_unix_sock(sock, data, | |
3240 | count > sizeof(data) ? sizeof(data) : count); | |
3241 | if (ret < 0) { | |
3242 | goto error; | |
3243 | } | |
3244 | ||
3245 | count -= (size_t) ret; | |
3246 | } | |
3247 | } | |
6e911cad | 3248 | /* FIXME: passing packed structure to non-packed pointer */ |
54d01ffb DG |
3249 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3250 | cmd_ctx->lsm->u.disable.channel_name, | |
6e911cad | 3251 | &cmd_ctx->lsm->u.disable.event); |
33a2b854 DG |
3252 | break; |
3253 | } | |
54d01ffb DG |
3254 | case LTTNG_ENABLE_CHANNEL: |
3255 | { | |
7972aab2 | 3256 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 3257 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
3258 | break; |
3259 | } | |
3260 | case LTTNG_ENABLE_EVENT: | |
3261 | { | |
882ef835 JI |
3262 | struct lttng_event_exclusion *exclusion = NULL; |
3263 | struct lttng_filter_bytecode *bytecode = NULL; | |
6b453b5e | 3264 | char *filter_expression = NULL; |
882ef835 | 3265 | |
67676bd8 DG |
3266 | /* Handle exclusion events and receive it from the client. */ |
3267 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3268 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3269 | ||
3270 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3271 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3272 | if (!exclusion) { | |
3273 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3274 | goto error; | |
882ef835 | 3275 | } |
882ef835 | 3276 | |
67676bd8 DG |
3277 | DBG("Receiving var len exclusion event list from client ..."); |
3278 | exclusion->count = count; | |
3279 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3280 | count * LTTNG_SYMBOL_NAME_LEN); | |
3281 | if (ret <= 0) { | |
3282 | DBG("Nothing recv() from client var len data... continuing"); | |
3283 | *sock_error = 1; | |
3284 | free(exclusion); | |
3285 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3286 | goto error; | |
3287 | } | |
3288 | } | |
3289 | ||
6b453b5e JG |
3290 | /* Get filter expression from client. */ |
3291 | if (cmd_ctx->lsm->u.enable.expression_len > 0) { | |
3292 | size_t expression_len = | |
3293 | cmd_ctx->lsm->u.enable.expression_len; | |
3294 | ||
3295 | if (expression_len > LTTNG_FILTER_MAX_LEN) { | |
3296 | ret = LTTNG_ERR_FILTER_INVAL; | |
3297 | free(exclusion); | |
3298 | goto error; | |
3299 | } | |
3300 | ||
3301 | filter_expression = zmalloc(expression_len); | |
3302 | if (!filter_expression) { | |
3303 | free(exclusion); | |
3304 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3305 | goto error; | |
3306 | } | |
3307 | ||
3308 | /* Receive var. len. data */ | |
3309 | DBG("Receiving var len filter's expression from client ..."); | |
3310 | ret = lttcomm_recv_unix_sock(sock, filter_expression, | |
3311 | expression_len); | |
3312 | if (ret <= 0) { | |
3313 | DBG("Nothing recv() from client car len data... continuing"); | |
3314 | *sock_error = 1; | |
3315 | free(filter_expression); | |
3316 | free(exclusion); | |
3317 | ret = LTTNG_ERR_FILTER_INVAL; | |
3318 | goto error; | |
3319 | } | |
3320 | } | |
3321 | ||
67676bd8 DG |
3322 | /* Handle filter and get bytecode from client. */ |
3323 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3324 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3325 | ||
3326 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3327 | ret = LTTNG_ERR_FILTER_INVAL; | |
faa9eb17 | 3328 | free(filter_expression); |
67676bd8 DG |
3329 | free(exclusion); |
3330 | goto error; | |
3331 | } | |
3332 | ||
3333 | bytecode = zmalloc(bytecode_len); | |
3334 | if (!bytecode) { | |
faa9eb17 | 3335 | free(filter_expression); |
67676bd8 DG |
3336 | free(exclusion); |
3337 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3338 | goto error; | |
882ef835 JI |
3339 | } |
3340 | ||
67676bd8 DG |
3341 | /* Receive var. len. data */ |
3342 | DBG("Receiving var len filter's bytecode from client ..."); | |
3343 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3344 | if (ret <= 0) { | |
3345 | DBG("Nothing recv() from client car len data... continuing"); | |
3346 | *sock_error = 1; | |
faa9eb17 | 3347 | free(filter_expression); |
67676bd8 DG |
3348 | free(bytecode); |
3349 | free(exclusion); | |
3350 | ret = LTTNG_ERR_FILTER_INVAL; | |
3351 | goto error; | |
3352 | } | |
3353 | ||
3354 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
faa9eb17 | 3355 | free(filter_expression); |
67676bd8 DG |
3356 | free(bytecode); |
3357 | free(exclusion); | |
3358 | ret = LTTNG_ERR_FILTER_INVAL; | |
3359 | goto error; | |
3360 | } | |
882ef835 | 3361 | } |
67676bd8 DG |
3362 | |
3363 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3364 | cmd_ctx->lsm->u.enable.channel_name, | |
6b453b5e JG |
3365 | &cmd_ctx->lsm->u.enable.event, |
3366 | filter_expression, bytecode, exclusion, | |
67676bd8 | 3367 | kernel_poll_pipe[1]); |
54d01ffb DG |
3368 | break; |
3369 | } | |
052da939 | 3370 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3371 | { |
9f19cc17 | 3372 | struct lttng_event *events; |
54d01ffb | 3373 | ssize_t nb_events; |
052da939 | 3374 | |
0845bbfa | 3375 | session_lock_list(); |
54d01ffb | 3376 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
0845bbfa | 3377 | session_unlock_list(); |
54d01ffb | 3378 | if (nb_events < 0) { |
f73fabfd | 3379 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3380 | ret = -nb_events; |
3381 | goto error; | |
2ef84c95 DG |
3382 | } |
3383 | ||
3384 | /* | |
3385 | * Setup lttng message with payload size set to the event list size in | |
3386 | * bytes and then copy list into the llm payload. | |
3387 | */ | |
052da939 | 3388 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3389 | if (ret < 0) { |
052da939 | 3390 | free(events); |
2ef84c95 DG |
3391 | goto setup_error; |
3392 | } | |
3393 | ||
3394 | /* Copy event list into message payload */ | |
9f19cc17 | 3395 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3396 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3397 | |
9f19cc17 | 3398 | free(events); |
2ef84c95 | 3399 | |
f73fabfd | 3400 | ret = LTTNG_OK; |
2ef84c95 DG |
3401 | break; |
3402 | } | |
f37d259d MD |
3403 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3404 | { | |
3405 | struct lttng_event_field *fields; | |
3406 | ssize_t nb_fields; | |
3407 | ||
0845bbfa | 3408 | session_lock_list(); |
a4b92340 DG |
3409 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3410 | &fields); | |
0845bbfa | 3411 | session_unlock_list(); |
f37d259d | 3412 | if (nb_fields < 0) { |
f73fabfd | 3413 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3414 | ret = -nb_fields; |
3415 | goto error; | |
3416 | } | |
3417 | ||
3418 | /* | |
3419 | * Setup lttng message with payload size set to the event list size in | |
3420 | * bytes and then copy list into the llm payload. | |
3421 | */ | |
a4b92340 DG |
3422 | ret = setup_lttng_msg(cmd_ctx, |
3423 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
3424 | if (ret < 0) { |
3425 | free(fields); | |
3426 | goto setup_error; | |
3427 | } | |
3428 | ||
3429 | /* Copy event list into message payload */ | |
3430 | memcpy(cmd_ctx->llm->payload, fields, | |
3431 | sizeof(struct lttng_event_field) * nb_fields); | |
3432 | ||
3433 | free(fields); | |
3434 | ||
f73fabfd | 3435 | ret = LTTNG_OK; |
f37d259d MD |
3436 | break; |
3437 | } | |
834978fd DG |
3438 | case LTTNG_LIST_SYSCALLS: |
3439 | { | |
3440 | struct lttng_event *events; | |
3441 | ssize_t nb_events; | |
3442 | ||
3443 | nb_events = cmd_list_syscalls(&events); | |
3444 | if (nb_events < 0) { | |
3445 | /* Return value is a negative lttng_error_code. */ | |
3446 | ret = -nb_events; | |
3447 | goto error; | |
3448 | } | |
3449 | ||
3450 | /* | |
3451 | * Setup lttng message with payload size set to the event list size in | |
3452 | * bytes and then copy list into the llm payload. | |
3453 | */ | |
3454 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); | |
3455 | if (ret < 0) { | |
3456 | free(events); | |
3457 | goto setup_error; | |
3458 | } | |
3459 | ||
3460 | /* Copy event list into message payload */ | |
3461 | memcpy(cmd_ctx->llm->payload, events, | |
3462 | sizeof(struct lttng_event) * nb_events); | |
3463 | ||
3464 | free(events); | |
3465 | ||
3466 | ret = LTTNG_OK; | |
3467 | break; | |
3468 | } | |
00e2e675 DG |
3469 | case LTTNG_SET_CONSUMER_URI: |
3470 | { | |
a4b92340 DG |
3471 | size_t nb_uri, len; |
3472 | struct lttng_uri *uris; | |
3473 | ||
3474 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3475 | len = nb_uri * sizeof(struct lttng_uri); | |
3476 | ||
3477 | if (nb_uri == 0) { | |
f73fabfd | 3478 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3479 | goto error; |
3480 | } | |
3481 | ||
3482 | uris = zmalloc(len); | |
3483 | if (uris == NULL) { | |
f73fabfd | 3484 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3485 | goto error; |
3486 | } | |
3487 | ||
3488 | /* Receive variable len data */ | |
77c7c900 | 3489 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3490 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3491 | if (ret <= 0) { | |
3492 | DBG("No URIs received from client... continuing"); | |
3493 | *sock_error = 1; | |
f73fabfd | 3494 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3495 | free(uris); |
a4b92340 DG |
3496 | goto error; |
3497 | } | |
3498 | ||
9863d1c8 JG |
3499 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); |
3500 | free(uris); | |
f73fabfd | 3501 | if (ret != LTTNG_OK) { |
a4b92340 DG |
3502 | goto error; |
3503 | } | |
3504 | ||
b1d41407 | 3505 | |
00e2e675 DG |
3506 | break; |
3507 | } | |
f3ed775e | 3508 | case LTTNG_START_TRACE: |
8c0faa1d | 3509 | { |
54d01ffb | 3510 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3511 | break; |
3512 | } | |
f3ed775e | 3513 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3514 | { |
54d01ffb | 3515 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3516 | break; |
3517 | } | |
5e16da05 MD |
3518 | case LTTNG_CREATE_SESSION: |
3519 | { | |
a4b92340 DG |
3520 | size_t nb_uri, len; |
3521 | struct lttng_uri *uris = NULL; | |
3522 | ||
3523 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3524 | len = nb_uri * sizeof(struct lttng_uri); | |
3525 | ||
3526 | if (nb_uri > 0) { | |
3527 | uris = zmalloc(len); | |
3528 | if (uris == NULL) { | |
f73fabfd | 3529 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3530 | goto error; |
3531 | } | |
3532 | ||
3533 | /* Receive variable len data */ | |
77c7c900 | 3534 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3535 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3536 | if (ret <= 0) { | |
3537 | DBG("No URIs received from client... continuing"); | |
3538 | *sock_error = 1; | |
f73fabfd | 3539 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3540 | free(uris); |
a4b92340 DG |
3541 | goto error; |
3542 | } | |
3543 | ||
3544 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3545 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3546 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3547 | free(uris); |
a4b92340 DG |
3548 | goto error; |
3549 | } | |
3550 | } | |
3551 | ||
3552 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3553 | &cmd_ctx->creds, 0); |
a4b92340 | 3554 | |
b1d41407 DG |
3555 | free(uris); |
3556 | ||
00e2e675 DG |
3557 | break; |
3558 | } | |
5e16da05 MD |
3559 | case LTTNG_DESTROY_SESSION: |
3560 | { | |
2f77fc4b | 3561 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3562 | |
3563 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3564 | cmd_ctx->session = NULL; |
5461b305 | 3565 | break; |
5e16da05 | 3566 | } |
9f19cc17 | 3567 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3568 | { |
54d01ffb DG |
3569 | ssize_t nb_dom; |
3570 | struct lttng_domain *domains; | |
5461b305 | 3571 | |
54d01ffb DG |
3572 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3573 | if (nb_dom < 0) { | |
f73fabfd | 3574 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3575 | ret = -nb_dom; |
3576 | goto error; | |
ce3d728c | 3577 | } |
520ff687 | 3578 | |
54d01ffb | 3579 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 | 3580 | if (ret < 0) { |
ae9c20bc | 3581 | free(domains); |
5461b305 | 3582 | goto setup_error; |
520ff687 | 3583 | } |
57167058 | 3584 | |
54d01ffb DG |
3585 | /* Copy event list into message payload */ |
3586 | memcpy(cmd_ctx->llm->payload, domains, | |
3587 | nb_dom * sizeof(struct lttng_domain)); | |
3588 | ||
3589 | free(domains); | |
5e16da05 | 3590 | |
f73fabfd | 3591 | ret = LTTNG_OK; |
5e16da05 MD |
3592 | break; |
3593 | } | |
9f19cc17 | 3594 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3595 | { |
6775595e | 3596 | int nb_chan; |
9247b8d0 | 3597 | struct lttng_channel *channels = NULL; |
54d01ffb | 3598 | |
b551a063 DG |
3599 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3600 | cmd_ctx->session, &channels); | |
54d01ffb | 3601 | if (nb_chan < 0) { |
f73fabfd | 3602 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3603 | ret = -nb_chan; |
3604 | goto error; | |
5461b305 | 3605 | } |
ca95a216 | 3606 | |
54d01ffb | 3607 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 | 3608 | if (ret < 0) { |
ae9c20bc | 3609 | free(channels); |
5461b305 DG |
3610 | goto setup_error; |
3611 | } | |
9f19cc17 | 3612 | |
54d01ffb DG |
3613 | /* Copy event list into message payload */ |
3614 | memcpy(cmd_ctx->llm->payload, channels, | |
3615 | nb_chan * sizeof(struct lttng_channel)); | |
3616 | ||
3617 | free(channels); | |
9f19cc17 | 3618 | |
f73fabfd | 3619 | ret = LTTNG_OK; |
5461b305 | 3620 | break; |
5e16da05 | 3621 | } |
9f19cc17 | 3622 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3623 | { |
b551a063 | 3624 | ssize_t nb_event; |
684d34d2 | 3625 | struct lttng_event *events = NULL; |
9f19cc17 | 3626 | |
b551a063 | 3627 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3628 | cmd_ctx->lsm->u.list.channel_name, &events); |
3629 | if (nb_event < 0) { | |
f73fabfd | 3630 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3631 | ret = -nb_event; |
3632 | goto error; | |
5461b305 | 3633 | } |
ca95a216 | 3634 | |
54d01ffb | 3635 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 | 3636 | if (ret < 0) { |
ae9c20bc | 3637 | free(events); |
5461b305 DG |
3638 | goto setup_error; |
3639 | } | |
9f19cc17 | 3640 | |
54d01ffb DG |
3641 | /* Copy event list into message payload */ |
3642 | memcpy(cmd_ctx->llm->payload, events, | |
3643 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3644 | |
54d01ffb | 3645 | free(events); |
9f19cc17 | 3646 | |
f73fabfd | 3647 | ret = LTTNG_OK; |
5461b305 | 3648 | break; |
5e16da05 MD |
3649 | } |
3650 | case LTTNG_LIST_SESSIONS: | |
3651 | { | |
8e0af1b4 | 3652 | unsigned int nr_sessions; |
5461b305 | 3653 | |
8e0af1b4 | 3654 | session_lock_list(); |
730389d9 DG |
3655 | nr_sessions = lttng_sessions_count( |
3656 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3657 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3658 | |
8e0af1b4 | 3659 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3660 | if (ret < 0) { |
54d01ffb | 3661 | session_unlock_list(); |
5461b305 | 3662 | goto setup_error; |
e065084a | 3663 | } |
5e16da05 | 3664 | |
6c9cc2ab | 3665 | /* Filled the session array */ |
2f77fc4b | 3666 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3667 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3668 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3669 | |
54d01ffb | 3670 | session_unlock_list(); |
5e16da05 | 3671 | |
f73fabfd | 3672 | ret = LTTNG_OK; |
5e16da05 MD |
3673 | break; |
3674 | } | |
d0254c7c MD |
3675 | case LTTNG_CALIBRATE: |
3676 | { | |
54d01ffb DG |
3677 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3678 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3679 | break; |
3680 | } | |
d9800920 DG |
3681 | case LTTNG_REGISTER_CONSUMER: |
3682 | { | |
2f77fc4b DG |
3683 | struct consumer_data *cdata; |
3684 | ||
3685 | switch (cmd_ctx->lsm->domain.type) { | |
3686 | case LTTNG_DOMAIN_KERNEL: | |
3687 | cdata = &kconsumer_data; | |
3688 | break; | |
3689 | default: | |
f73fabfd | 3690 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3691 | goto error; |
3692 | } | |
3693 | ||
54d01ffb | 3694 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3695 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3696 | break; |
3697 | } | |
6d805429 | 3698 | case LTTNG_DATA_PENDING: |
806e2684 | 3699 | { |
6d805429 | 3700 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
3701 | break; |
3702 | } | |
da3c9ec1 DG |
3703 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3704 | { | |
6dc3064a DG |
3705 | struct lttcomm_lttng_output_id reply; |
3706 | ||
3707 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3708 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3709 | if (ret != LTTNG_OK) { | |
3710 | goto error; | |
3711 | } | |
3712 | ||
3713 | ret = setup_lttng_msg(cmd_ctx, sizeof(reply)); | |
3714 | if (ret < 0) { | |
3715 | goto setup_error; | |
3716 | } | |
3717 | ||
3718 | /* Copy output list into message payload */ | |
3719 | memcpy(cmd_ctx->llm->payload, &reply, sizeof(reply)); | |
3720 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3721 | break; |
3722 | } | |
3723 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3724 | { | |
6dc3064a DG |
3725 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3726 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3727 | break; |
3728 | } | |
3729 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3730 | { | |
6dc3064a DG |
3731 | ssize_t nb_output; |
3732 | struct lttng_snapshot_output *outputs = NULL; | |
3733 | ||
3734 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
3735 | if (nb_output < 0) { | |
3736 | ret = -nb_output; | |
3737 | goto error; | |
3738 | } | |
3739 | ||
3740 | ret = setup_lttng_msg(cmd_ctx, | |
3741 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3742 | if (ret < 0) { | |
3743 | free(outputs); | |
3744 | goto setup_error; | |
3745 | } | |
3746 | ||
3747 | if (outputs) { | |
3748 | /* Copy output list into message payload */ | |
3749 | memcpy(cmd_ctx->llm->payload, outputs, | |
3750 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3751 | free(outputs); | |
3752 | } | |
3753 | ||
3754 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3755 | break; |
3756 | } | |
3757 | case LTTNG_SNAPSHOT_RECORD: | |
3758 | { | |
6dc3064a DG |
3759 | ret = cmd_snapshot_record(cmd_ctx->session, |
3760 | &cmd_ctx->lsm->u.snapshot_record.output, | |
3761 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
3762 | break; |
3763 | } | |
27babd3a DG |
3764 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
3765 | { | |
3766 | size_t nb_uri, len; | |
3767 | struct lttng_uri *uris = NULL; | |
3768 | ||
3769 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3770 | len = nb_uri * sizeof(struct lttng_uri); | |
3771 | ||
3772 | if (nb_uri > 0) { | |
3773 | uris = zmalloc(len); | |
3774 | if (uris == NULL) { | |
3775 | ret = LTTNG_ERR_FATAL; | |
3776 | goto error; | |
3777 | } | |
3778 | ||
3779 | /* Receive variable len data */ | |
3780 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3781 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3782 | if (ret <= 0) { | |
3783 | DBG("No URIs received from client... continuing"); | |
3784 | *sock_error = 1; | |
3785 | ret = LTTNG_ERR_SESSION_FAIL; | |
3786 | free(uris); | |
3787 | goto error; | |
3788 | } | |
3789 | ||
3790 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3791 | DBG("Creating session with ONE network URI is a bad call"); | |
3792 | ret = LTTNG_ERR_SESSION_FAIL; | |
3793 | free(uris); | |
3794 | goto error; | |
3795 | } | |
3796 | } | |
3797 | ||
3798 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
3799 | nb_uri, &cmd_ctx->creds); | |
3800 | free(uris); | |
3801 | break; | |
3802 | } | |
ecc48a90 JD |
3803 | case LTTNG_CREATE_SESSION_LIVE: |
3804 | { | |
3805 | size_t nb_uri, len; | |
3806 | struct lttng_uri *uris = NULL; | |
3807 | ||
3808 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3809 | len = nb_uri * sizeof(struct lttng_uri); | |
3810 | ||
3811 | if (nb_uri > 0) { | |
3812 | uris = zmalloc(len); | |
3813 | if (uris == NULL) { | |
3814 | ret = LTTNG_ERR_FATAL; | |
3815 | goto error; | |
3816 | } | |
3817 | ||
3818 | /* Receive variable len data */ | |
3819 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3820 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3821 | if (ret <= 0) { | |
3822 | DBG("No URIs received from client... continuing"); | |
3823 | *sock_error = 1; | |
3824 | ret = LTTNG_ERR_SESSION_FAIL; | |
3825 | free(uris); | |
3826 | goto error; | |
3827 | } | |
3828 | ||
3829 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3830 | DBG("Creating session with ONE network URI is a bad call"); | |
3831 | ret = LTTNG_ERR_SESSION_FAIL; | |
3832 | free(uris); | |
3833 | goto error; | |
3834 | } | |
3835 | } | |
3836 | ||
3837 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
3838 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
3839 | free(uris); | |
3840 | break; | |
3841 | } | |
fb198a11 JG |
3842 | case LTTNG_SAVE_SESSION: |
3843 | { | |
3844 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
3845 | &cmd_ctx->creds); | |
3846 | break; | |
3847 | } | |
5e16da05 | 3848 | default: |
f73fabfd | 3849 | ret = LTTNG_ERR_UND; |
5461b305 | 3850 | break; |
fac6795d DG |
3851 | } |
3852 | ||
5461b305 | 3853 | error: |
5461b305 DG |
3854 | if (cmd_ctx->llm == NULL) { |
3855 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3856 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3857 | goto setup_error; |
3858 | } | |
3859 | } | |
54d01ffb | 3860 | /* Set return code */ |
5461b305 | 3861 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3862 | setup_error: |
b5541356 | 3863 | if (cmd_ctx->session) { |
54d01ffb | 3864 | session_unlock(cmd_ctx->session); |
b5541356 | 3865 | } |
256a5576 MD |
3866 | if (need_tracing_session) { |
3867 | session_unlock_list(); | |
3868 | } | |
54d01ffb | 3869 | init_setup_error: |
8028d920 | 3870 | return ret; |
fac6795d DG |
3871 | } |
3872 | ||
44a5e5eb DG |
3873 | /* |
3874 | * Thread managing health check socket. | |
3875 | */ | |
3876 | static void *thread_manage_health(void *data) | |
3877 | { | |
eb4a2943 | 3878 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
3879 | uint32_t revents, nb_fd; |
3880 | struct lttng_poll_event events; | |
0c89d795 MD |
3881 | struct health_comm_msg msg; |
3882 | struct health_comm_reply reply; | |
44a5e5eb DG |
3883 | |
3884 | DBG("[thread] Manage health check started"); | |
3885 | ||
3886 | rcu_register_thread(); | |
3887 | ||
6d737ce4 DG |
3888 | /* We might hit an error path before this is created. */ |
3889 | lttng_poll_init(&events); | |
3cc04881 | 3890 | |
44a5e5eb DG |
3891 | /* Create unix socket */ |
3892 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
3893 | if (sock < 0) { | |
3894 | ERR("Unable to create health check Unix socket"); | |
3895 | ret = -1; | |
3896 | goto error; | |
3897 | } | |
3898 | ||
6c71277b MD |
3899 | if (is_root) { |
3900 | /* lttng health client socket path permissions */ | |
3901 | ret = chown(health_unix_sock_path, 0, | |
3902 | utils_get_group_id(tracing_group_name)); | |
3903 | if (ret < 0) { | |
3904 | ERR("Unable to set group on %s", health_unix_sock_path); | |
3905 | PERROR("chown"); | |
3906 | ret = -1; | |
3907 | goto error; | |
3908 | } | |
3909 | ||
3910 | ret = chmod(health_unix_sock_path, | |
3911 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3912 | if (ret < 0) { | |
3913 | ERR("Unable to set permissions on %s", health_unix_sock_path); | |
3914 | PERROR("chmod"); | |
3915 | ret = -1; | |
3916 | goto error; | |
3917 | } | |
3918 | } | |
3919 | ||
b662582b DG |
3920 | /* |
3921 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3922 | * show must go on. | |
3923 | */ | |
3924 | (void) utils_set_fd_cloexec(sock); | |
3925 | ||
44a5e5eb DG |
3926 | ret = lttcomm_listen_unix_sock(sock); |
3927 | if (ret < 0) { | |
3928 | goto error; | |
3929 | } | |
3930 | ||
3931 | /* | |
3932 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3933 | * more will be added to this poll set. | |
3934 | */ | |
d0b96690 | 3935 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
3936 | if (ret < 0) { |
3937 | goto error; | |
3938 | } | |
3939 | ||
3940 | /* Add the application registration socket */ | |
3941 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
3942 | if (ret < 0) { | |
3943 | goto error; | |
3944 | } | |
3945 | ||
ef367a93 | 3946 | sessiond_notify_ready(); |
97bc1426 | 3947 | |
44a5e5eb DG |
3948 | while (1) { |
3949 | DBG("Health check ready"); | |
3950 | ||
44a5e5eb DG |
3951 | /* Inifinite blocking call, waiting for transmission */ |
3952 | restart: | |
3953 | ret = lttng_poll_wait(&events, -1); | |
3954 | if (ret < 0) { | |
3955 | /* | |
3956 | * Restart interrupted system call. | |
3957 | */ | |
3958 | if (errno == EINTR) { | |
3959 | goto restart; | |
3960 | } | |
3961 | goto error; | |
3962 | } | |
3963 | ||
0d9c5d77 DG |
3964 | nb_fd = ret; |
3965 | ||
44a5e5eb DG |
3966 | for (i = 0; i < nb_fd; i++) { |
3967 | /* Fetch once the poll data */ | |
3968 | revents = LTTNG_POLL_GETEV(&events, i); | |
3969 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3970 | ||
e0077699 MD |
3971 | if (!revents) { |
3972 | /* No activity for this FD (poll implementation). */ | |
3973 | continue; | |
3974 | } | |
3975 | ||
44a5e5eb | 3976 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 3977 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 3978 | if (ret) { |
139ac872 MD |
3979 | err = 0; |
3980 | goto exit; | |
44a5e5eb DG |
3981 | } |
3982 | ||
3983 | /* Event on the registration socket */ | |
3984 | if (pollfd == sock) { | |
584fc280 MD |
3985 | if (revents & LPOLLIN) { |
3986 | continue; | |
3987 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
44a5e5eb DG |
3988 | ERR("Health socket poll error"); |
3989 | goto error; | |
584fc280 MD |
3990 | } else { |
3991 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
3992 | goto error; | |
44a5e5eb DG |
3993 | } |
3994 | } | |
3995 | } | |
3996 | ||
3997 | new_sock = lttcomm_accept_unix_sock(sock); | |
3998 | if (new_sock < 0) { | |
3999 | goto error; | |
4000 | } | |
4001 | ||
b662582b DG |
4002 | /* |
4003 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4004 | * show must go on. | |
4005 | */ | |
4006 | (void) utils_set_fd_cloexec(new_sock); | |
4007 | ||
44a5e5eb DG |
4008 | DBG("Receiving data from client for health..."); |
4009 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
4010 | if (ret <= 0) { | |
4011 | DBG("Nothing recv() from client... continuing"); | |
4012 | ret = close(new_sock); | |
4013 | if (ret) { | |
4014 | PERROR("close"); | |
4015 | } | |
4016 | new_sock = -1; | |
4017 | continue; | |
4018 | } | |
4019 | ||
4020 | rcu_thread_online(); | |
4021 | ||
53efb85a | 4022 | memset(&reply, 0, sizeof(reply)); |
6c71277b MD |
4023 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { |
4024 | /* | |
4025 | * health_check_state returns 0 if health is | |
4026 | * bad. | |
4027 | */ | |
4028 | if (!health_check_state(health_sessiond, i)) { | |
4029 | reply.ret_code |= 1ULL << i; | |
4030 | } | |
44a5e5eb DG |
4031 | } |
4032 | ||
6c71277b | 4033 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
4034 | |
4035 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
4036 | if (ret < 0) { | |
4037 | ERR("Failed to send health data back to client"); | |
4038 | } | |
4039 | ||
4040 | /* End of transmission */ | |
4041 | ret = close(new_sock); | |
4042 | if (ret) { | |
4043 | PERROR("close"); | |
4044 | } | |
4045 | new_sock = -1; | |
4046 | } | |
4047 | ||
139ac872 | 4048 | exit: |
44a5e5eb | 4049 | error: |
139ac872 MD |
4050 | if (err) { |
4051 | ERR("Health error occurred in %s", __func__); | |
4052 | } | |
44a5e5eb DG |
4053 | DBG("Health check thread dying"); |
4054 | unlink(health_unix_sock_path); | |
4055 | if (sock >= 0) { | |
4056 | ret = close(sock); | |
4057 | if (ret) { | |
4058 | PERROR("close"); | |
4059 | } | |
4060 | } | |
44a5e5eb DG |
4061 | |
4062 | lttng_poll_clean(&events); | |
4063 | ||
4064 | rcu_unregister_thread(); | |
4065 | return NULL; | |
4066 | } | |
4067 | ||
1d4b027a | 4068 | /* |
d063d709 DG |
4069 | * This thread manage all clients request using the unix client socket for |
4070 | * communication. | |
1d4b027a DG |
4071 | */ |
4072 | static void *thread_manage_clients(void *data) | |
4073 | { | |
139ac872 | 4074 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 4075 | int sock_error; |
5eb91c98 | 4076 | uint32_t revents, nb_fd; |
273ea72c | 4077 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 4078 | struct lttng_poll_event events; |
1d4b027a DG |
4079 | |
4080 | DBG("[thread] Manage client started"); | |
4081 | ||
f6a9efaa DG |
4082 | rcu_register_thread(); |
4083 | ||
6c71277b | 4084 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 4085 | |
840cb59c | 4086 | health_code_update(); |
44a5e5eb | 4087 | |
1d4b027a DG |
4088 | ret = lttcomm_listen_unix_sock(client_sock); |
4089 | if (ret < 0) { | |
35df2755 | 4090 | goto error_listen; |
1d4b027a DG |
4091 | } |
4092 | ||
5eb91c98 DG |
4093 | /* |
4094 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4095 | * more will be added to this poll set. | |
4096 | */ | |
d0b96690 | 4097 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 4098 | if (ret < 0) { |
35df2755 | 4099 | goto error_create_poll; |
5eb91c98 | 4100 | } |
273ea72c | 4101 | |
5eb91c98 DG |
4102 | /* Add the application registration socket */ |
4103 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
4104 | if (ret < 0) { | |
4105 | goto error; | |
4106 | } | |
273ea72c | 4107 | |
ef367a93 JG |
4108 | sessiond_notify_ready(); |
4109 | ret = sem_post(&load_info->message_thread_ready); | |
4110 | if (ret) { | |
4111 | PERROR("sem_post message_thread_ready"); | |
4112 | goto error; | |
4113 | } | |
0bb7724a | 4114 | |
72453c8c MD |
4115 | /* This testpoint is after we signal readiness to the parent. */ |
4116 | if (testpoint(sessiond_thread_manage_clients)) { | |
4117 | goto error; | |
4118 | } | |
4119 | ||
e547b070 | 4120 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
4121 | goto error; |
4122 | } | |
8ac94142 | 4123 | |
840cb59c | 4124 | health_code_update(); |
44a5e5eb | 4125 | |
1d4b027a | 4126 | while (1) { |
1d4b027a | 4127 | DBG("Accepting client command ..."); |
273ea72c DG |
4128 | |
4129 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 4130 | restart: |
a78af745 | 4131 | health_poll_entry(); |
5eb91c98 | 4132 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 4133 | health_poll_exit(); |
273ea72c | 4134 | if (ret < 0) { |
88f2b785 MD |
4135 | /* |
4136 | * Restart interrupted system call. | |
4137 | */ | |
4138 | if (errno == EINTR) { | |
4139 | goto restart; | |
4140 | } | |
273ea72c DG |
4141 | goto error; |
4142 | } | |
4143 | ||
0d9c5d77 DG |
4144 | nb_fd = ret; |
4145 | ||
5eb91c98 DG |
4146 | for (i = 0; i < nb_fd; i++) { |
4147 | /* Fetch once the poll data */ | |
4148 | revents = LTTNG_POLL_GETEV(&events, i); | |
4149 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4150 | ||
840cb59c | 4151 | health_code_update(); |
44a5e5eb | 4152 | |
e0077699 MD |
4153 | if (!revents) { |
4154 | /* No activity for this FD (poll implementation). */ | |
4155 | continue; | |
4156 | } | |
4157 | ||
5eb91c98 | 4158 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4159 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 4160 | if (ret) { |
139ac872 MD |
4161 | err = 0; |
4162 | goto exit; | |
5eb91c98 DG |
4163 | } |
4164 | ||
4165 | /* Event on the registration socket */ | |
4166 | if (pollfd == client_sock) { | |
584fc280 MD |
4167 | if (revents & LPOLLIN) { |
4168 | continue; | |
4169 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
5eb91c98 DG |
4170 | ERR("Client socket poll error"); |
4171 | goto error; | |
584fc280 MD |
4172 | } else { |
4173 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4174 | goto error; | |
5eb91c98 DG |
4175 | } |
4176 | } | |
4177 | } | |
4178 | ||
4179 | DBG("Wait for client response"); | |
4180 | ||
840cb59c | 4181 | health_code_update(); |
44a5e5eb | 4182 | |
5eb91c98 DG |
4183 | sock = lttcomm_accept_unix_sock(client_sock); |
4184 | if (sock < 0) { | |
273ea72c | 4185 | goto error; |
273ea72c DG |
4186 | } |
4187 | ||
b662582b DG |
4188 | /* |
4189 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4190 | * show must go on. | |
4191 | */ | |
4192 | (void) utils_set_fd_cloexec(sock); | |
4193 | ||
be040666 DG |
4194 | /* Set socket option for credentials retrieval */ |
4195 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
4196 | if (ret < 0) { | |
4197 | goto error; | |
4198 | } | |
4199 | ||
5eb91c98 | 4200 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 4201 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 4202 | if (cmd_ctx == NULL) { |
76d7553f | 4203 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 4204 | goto error; |
5eb91c98 | 4205 | } |
1d4b027a | 4206 | |
5eb91c98 | 4207 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 4208 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 4209 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 4210 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
4211 | goto error; |
4212 | } | |
1d4b027a | 4213 | |
5eb91c98 DG |
4214 | cmd_ctx->llm = NULL; |
4215 | cmd_ctx->session = NULL; | |
1d4b027a | 4216 | |
840cb59c | 4217 | health_code_update(); |
44a5e5eb | 4218 | |
5eb91c98 DG |
4219 | /* |
4220 | * Data is received from the lttng client. The struct | |
4221 | * lttcomm_session_msg (lsm) contains the command and data request of | |
4222 | * the client. | |
4223 | */ | |
4224 | DBG("Receiving data from client ..."); | |
be040666 DG |
4225 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
4226 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
4227 | if (ret <= 0) { |
4228 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
4229 | ret = close(sock); |
4230 | if (ret) { | |
4231 | PERROR("close"); | |
4232 | } | |
4233 | sock = -1; | |
a2c0da86 | 4234 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4235 | continue; |
4236 | } | |
1d4b027a | 4237 | |
840cb59c | 4238 | health_code_update(); |
44a5e5eb | 4239 | |
5eb91c98 DG |
4240 | // TODO: Validate cmd_ctx including sanity check for |
4241 | // security purpose. | |
f7776ea7 | 4242 | |
f6a9efaa | 4243 | rcu_thread_online(); |
5eb91c98 DG |
4244 | /* |
4245 | * This function dispatch the work to the kernel or userspace tracer | |
4246 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
4247 | * informations for the client. The command context struct contains | |
4248 | * everything this function may needs. | |
4249 | */ | |
53a80697 | 4250 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 4251 | rcu_thread_offline(); |
5eb91c98 | 4252 | if (ret < 0) { |
36134aa1 DG |
4253 | ret = close(sock); |
4254 | if (ret) { | |
4255 | PERROR("close"); | |
53a80697 | 4256 | } |
36134aa1 | 4257 | sock = -1; |
bbd973c2 | 4258 | /* |
5eb91c98 | 4259 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 4260 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
4261 | * (ENOMEM). Error detected but still accept |
4262 | * command, unless a socket error has been | |
4263 | * detected. | |
bbd973c2 | 4264 | */ |
bbd973c2 | 4265 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4266 | continue; |
4267 | } | |
d6e4fca4 | 4268 | |
840cb59c | 4269 | health_code_update(); |
44a5e5eb | 4270 | |
54d01ffb DG |
4271 | DBG("Sending response (size: %d, retcode: %s)", |
4272 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 4273 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 4274 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
4275 | if (ret < 0) { |
4276 | ERR("Failed to send data back to client"); | |
bbd973c2 | 4277 | } |
1d4b027a | 4278 | |
5eb91c98 | 4279 | /* End of transmission */ |
76d7553f MD |
4280 | ret = close(sock); |
4281 | if (ret) { | |
4282 | PERROR("close"); | |
4283 | } | |
4284 | sock = -1; | |
be040666 DG |
4285 | |
4286 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 4287 | |
840cb59c | 4288 | health_code_update(); |
273ea72c DG |
4289 | } |
4290 | ||
139ac872 | 4291 | exit: |
5eb91c98 | 4292 | error: |
35df2755 CB |
4293 | if (sock >= 0) { |
4294 | ret = close(sock); | |
4295 | if (ret) { | |
4296 | PERROR("close"); | |
4297 | } | |
139ac872 | 4298 | } |
44a5e5eb | 4299 | |
35df2755 CB |
4300 | lttng_poll_clean(&events); |
4301 | clean_command_ctx(&cmd_ctx); | |
4302 | ||
4303 | error_listen: | |
4304 | error_create_poll: | |
273ea72c | 4305 | unlink(client_unix_sock_path); |
76d7553f MD |
4306 | if (client_sock >= 0) { |
4307 | ret = close(client_sock); | |
4308 | if (ret) { | |
4309 | PERROR("close"); | |
4310 | } | |
a4b35e07 | 4311 | } |
35df2755 CB |
4312 | |
4313 | if (err) { | |
840cb59c | 4314 | health_error(); |
35df2755 | 4315 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4316 | } |
273ea72c | 4317 | |
8782cc74 | 4318 | health_unregister(health_sessiond); |
35df2755 CB |
4319 | |
4320 | DBG("Client thread dying"); | |
f6a9efaa DG |
4321 | |
4322 | rcu_unregister_thread(); | |
1d4b027a DG |
4323 | return NULL; |
4324 | } | |
4325 | ||
4326 | ||
fac6795d DG |
4327 | /* |
4328 | * usage function on stderr | |
4329 | */ | |
4330 | static void usage(void) | |
4331 | { | |
b716ce68 | 4332 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
4333 | fprintf(stderr, " -h, --help Display this usage.\n"); |
4334 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
4335 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
4336 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
4337 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
4338 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
4339 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
4340 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
4341 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
4342 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
4343 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
4344 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
4345 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 | 4346 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
72dd7491 | 4347 | fprintf(stderr, " -b, --background Start as a daemon, keeping console open.\n"); |
d6f42150 DG |
4348 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); |
4349 | fprintf(stderr, " -V, --version Show version number.\n"); | |
7fe6d2c5 | 4350 | fprintf(stderr, " -S, --sig-parent Send SIGUSR1 to parent pid to notify readiness.\n"); |
d6f42150 DG |
4351 | fprintf(stderr, " -q, --quiet No output at all.\n"); |
4352 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
35f90c40 | 4353 | fprintf(stderr, " -p, --pidfile FILE Write a pid to FILE name overriding the default value.\n"); |
3bd1e081 | 4354 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 4355 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
1b2ef7fe | 4356 | fprintf(stderr, " --agent-tcp-port Agent registration TCP port\n"); |
39ddba99 | 4357 | fprintf(stderr, " -f --config PATH Load daemon configuration file\n"); |
ef367a93 | 4358 | fprintf(stderr, " -l --load PATH Load session configuration\n"); |
fbb9748b | 4359 | fprintf(stderr, " --kmod-probes Specify kernel module probes to load\n"); |
c9d42407 | 4360 | fprintf(stderr, " --extra-kmod-probes Specify extra kernel module probes to load\n"); |
fac6795d DG |
4361 | } |
4362 | ||
4363 | /* | |
26296c48 JG |
4364 | * Take an option from the getopt output and set it in the right variable to be |
4365 | * used later. | |
4366 | * | |
4367 | * Return 0 on success else a negative value. | |
fac6795d | 4368 | */ |
26296c48 | 4369 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4370 | { |
26296c48 | 4371 | int ret = 0; |
fac6795d | 4372 | |
bc26aefd JG |
4373 | if (arg && arg[0] == '\0') { |
4374 | /* | |
4375 | * This only happens if the value is read from daemon config | |
4376 | * file. This means the option requires an argument and the | |
4377 | * configuration file contains a line such as: | |
4378 | * my_option = | |
4379 | */ | |
4380 | ret = -EINVAL; | |
4381 | goto end; | |
4382 | } | |
4383 | ||
26296c48 JG |
4384 | switch (opt) { |
4385 | case 0: | |
4386 | fprintf(stderr, "option %s", optname); | |
4387 | if (arg) { | |
4388 | fprintf(stderr, " with arg %s\n", arg); | |
fac6795d | 4389 | } |
26296c48 JG |
4390 | break; |
4391 | case 'c': | |
4392 | snprintf(client_unix_sock_path, PATH_MAX, "%s", arg); | |
4393 | break; | |
4394 | case 'a': | |
4395 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", arg); | |
4396 | break; | |
4397 | case 'd': | |
4398 | opt_daemon = 1; | |
4399 | break; | |
72dd7491 MD |
4400 | case 'b': |
4401 | opt_background = 1; | |
4402 | break; | |
26296c48 | 4403 | case 'g': |
41e16a7c JG |
4404 | /* |
4405 | * If the override option is set, the pointer points to a | |
4406 | * *non* const thus freeing it even though the variable type is | |
4407 | * set to const. | |
4408 | */ | |
4409 | if (tracing_group_name_override) { | |
4410 | free((void *) tracing_group_name); | |
4411 | } | |
26296c48 | 4412 | tracing_group_name = strdup(arg); |
db322c4d JG |
4413 | if (!tracing_group_name) { |
4414 | perror("strdup"); | |
4415 | ret = -ENOMEM; | |
4416 | } | |
41e16a7c | 4417 | tracing_group_name_override = 1; |
26296c48 JG |
4418 | break; |
4419 | case 'h': | |
4420 | usage(); | |
4421 | exit(EXIT_FAILURE); | |
4422 | case 'V': | |
4423 | fprintf(stdout, "%s\n", VERSION); | |
4424 | exit(EXIT_SUCCESS); | |
4425 | case 'S': | |
4426 | opt_sig_parent = 1; | |
4427 | break; | |
4428 | case 'E': | |
4429 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4430 | break; | |
4431 | case 'C': | |
4432 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4433 | break; | |
4434 | case 'F': | |
4435 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4436 | break; | |
4437 | case 'D': | |
4438 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4439 | break; | |
4440 | case 'H': | |
4441 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4442 | break; | |
4443 | case 'G': | |
4444 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4445 | break; | |
4446 | case 'N': | |
4447 | opt_no_kernel = 1; | |
4448 | break; | |
4449 | case 'q': | |
4450 | lttng_opt_quiet = 1; | |
4451 | break; | |
4452 | case 'v': | |
4453 | /* Verbose level can increase using multiple -v */ | |
4454 | if (arg) { | |
13755a18 | 4455 | /* Value obtained from config file */ |
26296c48 JG |
4456 | lttng_opt_verbose = config_parse_value(arg); |
4457 | } else { | |
13755a18 JG |
4458 | /* -v used on command line */ |
4459 | lttng_opt_verbose++; | |
26296c48 | 4460 | } |
13755a18 JG |
4461 | /* Clamp value to [0, 3] */ |
4462 | lttng_opt_verbose = lttng_opt_verbose < 0 ? 0 : | |
4463 | (lttng_opt_verbose <= 3 ? lttng_opt_verbose : 3); | |
26296c48 JG |
4464 | break; |
4465 | case 'Z': | |
4466 | if (arg) { | |
4467 | opt_verbose_consumer = config_parse_value(arg); | |
4468 | } else { | |
3bd1e081 | 4469 | opt_verbose_consumer += 1; |
26296c48 JG |
4470 | } |
4471 | break; | |
4472 | case 'u': | |
41e16a7c JG |
4473 | if (consumerd32_bin_override) { |
4474 | free((void *) consumerd32_bin); | |
4475 | } | |
26296c48 | 4476 | consumerd32_bin = strdup(arg); |
db322c4d JG |
4477 | if (!consumerd32_bin) { |
4478 | perror("strdup"); | |
4479 | ret = -ENOMEM; | |
4480 | } | |
26296c48 JG |
4481 | consumerd32_bin_override = 1; |
4482 | break; | |
4483 | case 'U': | |
41e16a7c JG |
4484 | if (consumerd32_libdir_override) { |
4485 | free((void *) consumerd32_libdir); | |
4486 | } | |
26296c48 | 4487 | consumerd32_libdir = strdup(arg); |
db322c4d JG |
4488 | if (!consumerd32_libdir) { |
4489 | perror("strdup"); | |
4490 | ret = -ENOMEM; | |
4491 | } | |
26296c48 JG |
4492 | consumerd32_libdir_override = 1; |
4493 | break; | |
4494 | case 't': | |
41e16a7c JG |
4495 | if (consumerd64_bin_override) { |
4496 | free((void *) consumerd64_bin); | |
4497 | } | |
26296c48 | 4498 | consumerd64_bin = strdup(arg); |
db322c4d JG |
4499 | if (!consumerd64_bin) { |
4500 | perror("strdup"); | |
4501 | ret = -ENOMEM; | |
4502 | } | |
26296c48 JG |
4503 | consumerd64_bin_override = 1; |
4504 | break; | |
4505 | case 'T': | |
41e16a7c JG |
4506 | if (consumerd64_libdir_override) { |
4507 | free((void *) consumerd64_libdir); | |
4508 | } | |
26296c48 | 4509 | consumerd64_libdir = strdup(arg); |
db322c4d JG |
4510 | if (!consumerd64_libdir) { |
4511 | perror("strdup"); | |
4512 | ret = -ENOMEM; | |
4513 | } | |
26296c48 JG |
4514 | consumerd64_libdir_override = 1; |
4515 | break; | |
4516 | case 'p': | |
41e16a7c | 4517 | free(opt_pidfile); |
26296c48 | 4518 | opt_pidfile = strdup(arg); |
db322c4d JG |
4519 | if (!opt_pidfile) { |
4520 | perror("strdup"); | |
4521 | ret = -ENOMEM; | |
4522 | } | |
26296c48 | 4523 | break; |
022d91ba | 4524 | case 'J': /* Agent TCP port. */ |
26296c48 JG |
4525 | { |
4526 | unsigned long v; | |
4d076222 | 4527 | |
26296c48 JG |
4528 | errno = 0; |
4529 | v = strtoul(arg, NULL, 0); | |
4530 | if (errno != 0 || !isdigit(arg[0])) { | |
1b2ef7fe | 4531 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); |
26296c48 JG |
4532 | return -1; |
4533 | } | |
4534 | if (v == 0 || v >= 65535) { | |
1b2ef7fe | 4535 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); |
26296c48 JG |
4536 | return -1; |
4537 | } | |
022d91ba DG |
4538 | agent_tcp_port = (uint32_t) v; |
4539 | DBG3("Agent TCP port set to non default: %u", agent_tcp_port); | |
26296c48 JG |
4540 | break; |
4541 | } | |
ef367a93 | 4542 | case 'l': |
41e16a7c | 4543 | free(opt_load_session_path); |
ef367a93 JG |
4544 | opt_load_session_path = strdup(arg); |
4545 | if (!opt_load_session_path) { | |
4546 | perror("strdup"); | |
4547 | ret = -ENOMEM; | |
4548 | } | |
4549 | break; | |
fbb9748b | 4550 | case 'P': /* probe modules list */ |
41e16a7c | 4551 | free(kmod_probes_list); |
fbb9748b | 4552 | kmod_probes_list = strdup(arg); |
db322c4d JG |
4553 | if (!kmod_probes_list) { |
4554 | perror("strdup"); | |
4555 | ret = -ENOMEM; | |
c9d42407 PP |
4556 | } |
4557 | break; | |
4558 | case 'e': | |
4559 | free(kmod_extra_probes_list); | |
4560 | kmod_extra_probes_list = strdup(arg); | |
4561 | if (!kmod_extra_probes_list) { | |
4562 | perror("strdup"); | |
4563 | ret = -ENOMEM; | |
db322c4d | 4564 | } |
fbb9748b | 4565 | break; |
7ab02a27 DG |
4566 | case 'f': |
4567 | /* This is handled in set_options() thus silent break. */ | |
4568 | break; | |
26296c48 JG |
4569 | default: |
4570 | /* Unknown option or other error. | |
4571 | * Error is printed by getopt, just return */ | |
4572 | ret = -1; | |
4573 | } | |
4574 | ||
db526a2a | 4575 | end: |
bc26aefd JG |
4576 | if (ret == -EINVAL) { |
4577 | const char *opt_name = "unknown"; | |
4578 | int i; | |
4579 | ||
4580 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
4581 | i++) { | |
4582 | if (opt == long_options[i].val) { | |
4583 | opt_name = long_options[i].name; | |
4584 | break; | |
4585 | } | |
4586 | } | |
4587 | ||
4588 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
4589 | opt_name); | |
4590 | } | |
db526a2a | 4591 | |
26296c48 JG |
4592 | return ret; |
4593 | } | |
4594 | ||
4595 | /* | |
4596 | * config_entry_handler_cb used to handle options read from a config file. | |
4597 | * See config_entry_handler_cb comment in common/config/config.h for the | |
4598 | * return value conventions. | |
4599 | */ | |
4600 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
4601 | { | |
4602 | int ret = 0, i; | |
4603 | ||
4604 | if (!entry || !entry->name || !entry->value) { | |
4605 | ret = -EINVAL; | |
4606 | goto end; | |
4607 | } | |
4608 | ||
4609 | /* Check if the option is to be ignored */ | |
4610 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
4611 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
4612 | goto end; | |
4613 | } | |
4614 | } | |
4615 | ||
4616 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
4617 | i++) { | |
4618 | ||
4619 | /* Ignore if not fully matched. */ | |
4620 | if (strcmp(entry->name, long_options[i].name)) { | |
4621 | continue; | |
4622 | } | |
4623 | ||
4624 | /* | |
4625 | * If the option takes no argument on the command line, we have to | |
4626 | * check if the value is "true". We support non-zero numeric values, | |
4627 | * true, on and yes. | |
4628 | */ | |
4629 | if (!long_options[i].has_arg) { | |
4630 | ret = config_parse_value(entry->value); | |
4631 | if (ret <= 0) { | |
4632 | if (ret) { | |
4633 | WARN("Invalid configuration value \"%s\" for option %s", | |
4634 | entry->value, entry->name); | |
4635 | } | |
4636 | /* False, skip boolean config option. */ | |
4637 | goto end; | |
4d076222 | 4638 | } |
26296c48 JG |
4639 | } |
4640 | ||
4641 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
4642 | goto end; | |
4643 | } | |
4644 | ||
4645 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
4646 | ||
4647 | end: | |
4648 | return ret; | |
4649 | } | |
4650 | ||
4651 | /* | |
4652 | * daemon configuration loading and argument parsing | |
4653 | */ | |
4654 | static int set_options(int argc, char **argv) | |
4655 | { | |
4656 | int ret = 0, c = 0, option_index = 0; | |
4657 | int orig_optopt = optopt, orig_optind = optind; | |
4658 | char *optstring; | |
4659 | const char *config_path = NULL; | |
4660 | ||
4661 | optstring = utils_generate_optstring(long_options, | |
4662 | sizeof(long_options) / sizeof(struct option)); | |
4663 | if (!optstring) { | |
4664 | ret = -ENOMEM; | |
4665 | goto end; | |
4666 | } | |
4667 | ||
4668 | /* Check for the --config option */ | |
4669 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
4670 | &option_index)) != -1) { | |
4671 | if (c == '?') { | |
4672 | ret = -EINVAL; | |
4673 | goto end; | |
4674 | } else if (c != 'f') { | |
4675 | /* if not equal to --config option. */ | |
4676 | continue; | |
4677 | } | |
4678 | ||
4679 | config_path = utils_expand_path(optarg); | |
4680 | if (!config_path) { | |
4681 | ERR("Failed to resolve path: %s", optarg); | |
4682 | } | |
4683 | } | |
4684 | ||
4685 | ret = config_get_section_entries(config_path, config_section_name, | |
4686 | config_entry_handler, NULL); | |
4687 | if (ret) { | |
4688 | if (ret > 0) { | |
4689 | ERR("Invalid configuration option at line %i", ret); | |
4690 | ret = -1; | |
4691 | } | |
4692 | goto end; | |
4693 | } | |
4694 | ||
4695 | /* Reset getopt's global state */ | |
4696 | optopt = orig_optopt; | |
4697 | optind = orig_optind; | |
4698 | while (1) { | |
4699 | c = getopt_long(argc, argv, optstring, long_options, &option_index); | |
4700 | if (c == -1) { | |
4d076222 DG |
4701 | break; |
4702 | } | |
26296c48 JG |
4703 | |
4704 | ret = set_option(c, optarg, long_options[option_index].name); | |
4705 | if (ret < 0) { | |
4706 | break; | |
fac6795d DG |
4707 | } |
4708 | } | |
4709 | ||
26296c48 JG |
4710 | end: |
4711 | free(optstring); | |
4712 | return ret; | |
fac6795d DG |
4713 | } |
4714 | ||
4715 | /* | |
d063d709 | 4716 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
4717 | * apps_sock - The communication socket for all UST apps. |
4718 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 4719 | */ |
cf3af59e | 4720 | static int init_daemon_socket(void) |
fac6795d DG |
4721 | { |
4722 | int ret = 0; | |
4723 | mode_t old_umask; | |
4724 | ||
4725 | old_umask = umask(0); | |
4726 | ||
4727 | /* Create client tool unix socket */ | |
d6f42150 DG |
4728 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
4729 | if (client_sock < 0) { | |
4730 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
4731 | ret = -1; |
4732 | goto end; | |
4733 | } | |
4734 | ||
b662582b DG |
4735 | /* Set the cloexec flag */ |
4736 | ret = utils_set_fd_cloexec(client_sock); | |
4737 | if (ret < 0) { | |
4738 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
4739 | "Continuing but note that the consumer daemon will have a " | |
4740 | "reference to this socket on exec()", client_sock); | |
4741 | } | |
4742 | ||
fac6795d DG |
4743 | /* File permission MUST be 660 */ |
4744 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4745 | if (ret < 0) { | |
d6f42150 | 4746 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 4747 | PERROR("chmod"); |
fac6795d DG |
4748 | goto end; |
4749 | } | |
4750 | ||
4751 | /* Create the application unix socket */ | |
d6f42150 DG |
4752 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
4753 | if (apps_sock < 0) { | |
4754 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
4755 | ret = -1; |
4756 | goto end; | |
4757 | } | |
4758 | ||
b662582b DG |
4759 | /* Set the cloexec flag */ |
4760 | ret = utils_set_fd_cloexec(apps_sock); | |
4761 | if (ret < 0) { | |
4762 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
4763 | "Continuing but note that the consumer daemon will have a " | |
4764 | "reference to this socket on exec()", apps_sock); | |
4765 | } | |
4766 | ||
d6f42150 | 4767 | /* File permission MUST be 666 */ |
54d01ffb DG |
4768 | ret = chmod(apps_unix_sock_path, |
4769 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 4770 | if (ret < 0) { |
d6f42150 | 4771 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 4772 | PERROR("chmod"); |
fac6795d DG |
4773 | goto end; |
4774 | } | |
4775 | ||
b662582b DG |
4776 | DBG3("Session daemon client socket %d and application socket %d created", |
4777 | client_sock, apps_sock); | |
4778 | ||
fac6795d DG |
4779 | end: |
4780 | umask(old_umask); | |
4781 | return ret; | |
4782 | } | |
4783 | ||
4784 | /* | |
54d01ffb DG |
4785 | * Check if the global socket is available, and if a daemon is answering at the |
4786 | * other side. If yes, error is returned. | |
fac6795d | 4787 | */ |
cf3af59e | 4788 | static int check_existing_daemon(void) |
fac6795d | 4789 | { |
7d8234d9 | 4790 | /* Is there anybody out there ? */ |
099e26bd | 4791 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 4792 | return -EEXIST; |
099e26bd | 4793 | } |
b09c7c76 DG |
4794 | |
4795 | return 0; | |
fac6795d DG |
4796 | } |
4797 | ||
fac6795d | 4798 | /* |
d063d709 | 4799 | * Set the tracing group gid onto the client socket. |
5e16da05 | 4800 | * |
d063d709 | 4801 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 4802 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 4803 | */ |
be040666 | 4804 | static int set_permissions(char *rundir) |
fac6795d DG |
4805 | { |
4806 | int ret; | |
996b65c8 | 4807 | gid_t gid; |
fac6795d | 4808 | |
6c71277b | 4809 | gid = utils_get_group_id(tracing_group_name); |
fac6795d | 4810 | |
d6f42150 | 4811 | /* Set lttng run dir */ |
be040666 | 4812 | ret = chown(rundir, 0, gid); |
d6f42150 | 4813 | if (ret < 0) { |
be040666 | 4814 | ERR("Unable to set group on %s", rundir); |
76d7553f | 4815 | PERROR("chown"); |
d6f42150 DG |
4816 | } |
4817 | ||
6c71277b MD |
4818 | /* |
4819 | * Ensure all applications and tracing group can search the run | |
4820 | * dir. Allow everyone to read the directory, since it does not | |
4821 | * buy us anything to hide its content. | |
4822 | */ | |
4823 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
4824 | if (ret < 0) { |
4825 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 4826 | PERROR("chmod"); |
d1613cf5 JN |
4827 | } |
4828 | ||
d6f42150 | 4829 | /* lttng client socket path */ |
996b65c8 | 4830 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 4831 | if (ret < 0) { |
d6f42150 | 4832 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 4833 | PERROR("chown"); |
d6f42150 DG |
4834 | } |
4835 | ||
3bd1e081 | 4836 | /* kconsumer error socket path */ |
6c71277b | 4837 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 4838 | if (ret < 0) { |
3bd1e081 | 4839 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 4840 | PERROR("chown"); |
3bd1e081 MD |
4841 | } |
4842 | ||
7753dea8 | 4843 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 4844 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
4845 | if (ret < 0) { |
4846 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 4847 | PERROR("chown"); |
7753dea8 MD |
4848 | } |
4849 | ||
4850 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 4851 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 4852 | if (ret < 0) { |
7753dea8 | 4853 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 4854 | PERROR("chown"); |
fac6795d DG |
4855 | } |
4856 | ||
d6f42150 | 4857 | DBG("All permissions are set"); |
e07ae692 | 4858 | |
fac6795d DG |
4859 | return ret; |
4860 | } | |
4861 | ||
d6f42150 | 4862 | /* |
d063d709 | 4863 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 4864 | */ |
67e40797 | 4865 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
4866 | { |
4867 | int ret; | |
4868 | ||
67e40797 DG |
4869 | DBG3("Creating LTTng run directory: %s", rundir); |
4870 | ||
d1613cf5 | 4871 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 4872 | if (ret < 0) { |
b1f11e69 | 4873 | if (errno != EEXIST) { |
67e40797 | 4874 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
4875 | goto error; |
4876 | } else { | |
4877 | ret = 0; | |
4878 | } | |
d6f42150 DG |
4879 | } |
4880 | ||
4881 | error: | |
4882 | return ret; | |
4883 | } | |
4884 | ||
4885 | /* | |
d063d709 DG |
4886 | * Setup sockets and directory needed by the kconsumerd communication with the |
4887 | * session daemon. | |
d6f42150 | 4888 | */ |
67e40797 DG |
4889 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
4890 | const char *rundir) | |
d6f42150 DG |
4891 | { |
4892 | int ret; | |
67e40797 | 4893 | char path[PATH_MAX]; |
d6f42150 | 4894 | |
6c71277b | 4895 | switch (consumer_data->type) { |
7753dea8 | 4896 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 4897 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
4898 | break; |
4899 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 4900 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
4901 | break; |
4902 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 4903 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
4904 | break; |
4905 | default: | |
4906 | ERR("Consumer type unknown"); | |
4907 | ret = -EINVAL; | |
4908 | goto error; | |
d6f42150 DG |
4909 | } |
4910 | ||
67e40797 DG |
4911 | DBG2("Creating consumer directory: %s", path); |
4912 | ||
6c71277b | 4913 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
d6f42150 | 4914 | if (ret < 0) { |
6beb2242 | 4915 | if (errno != EEXIST) { |
f11e84c2 | 4916 | PERROR("mkdir"); |
3bd1e081 | 4917 | ERR("Failed to create %s", path); |
6beb2242 DG |
4918 | goto error; |
4919 | } | |
f11e84c2 | 4920 | ret = -1; |
d6f42150 | 4921 | } |
6c71277b MD |
4922 | if (is_root) { |
4923 | ret = chown(path, 0, utils_get_group_id(tracing_group_name)); | |
4924 | if (ret < 0) { | |
4925 | ERR("Unable to set group on %s", path); | |
4926 | PERROR("chown"); | |
4927 | goto error; | |
4928 | } | |
4929 | } | |
d6f42150 DG |
4930 | |
4931 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
4932 | consumer_data->err_sock = |
4933 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
4934 | if (consumer_data->err_sock < 0) { | |
4935 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
4936 | ret = -1; |
4937 | goto error; | |
4938 | } | |
4939 | ||
a24f05ab MD |
4940 | /* |
4941 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4942 | * show must go on. | |
4943 | */ | |
4944 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
4945 | if (ret < 0) { | |
4946 | PERROR("utils_set_fd_cloexec"); | |
4947 | /* continue anyway */ | |
4948 | } | |
4949 | ||
d6f42150 | 4950 | /* File permission MUST be 660 */ |
3bd1e081 | 4951 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 4952 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 4953 | if (ret < 0) { |
3bd1e081 | 4954 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 4955 | PERROR("chmod"); |
d6f42150 DG |
4956 | goto error; |
4957 | } | |
4958 | ||
4959 | error: | |
4960 | return ret; | |
4961 | } | |
4962 | ||
fac6795d | 4963 | /* |
d063d709 | 4964 | * Signal handler for the daemon |
cf3af59e | 4965 | * |
54d01ffb DG |
4966 | * Simply stop all worker threads, leaving main() return gracefully after |
4967 | * joining all threads and calling cleanup(). | |
fac6795d DG |
4968 | */ |
4969 | static void sighandler(int sig) | |
4970 | { | |
4971 | switch (sig) { | |
cf3af59e | 4972 | case SIGPIPE: |
af87c45a | 4973 | DBG("SIGPIPE caught"); |
cf3af59e MD |
4974 | return; |
4975 | case SIGINT: | |
af87c45a | 4976 | DBG("SIGINT caught"); |
cf3af59e MD |
4977 | stop_threads(); |
4978 | break; | |
4979 | case SIGTERM: | |
af87c45a | 4980 | DBG("SIGTERM caught"); |
cf3af59e MD |
4981 | stop_threads(); |
4982 | break; | |
0bb7724a DG |
4983 | case SIGUSR1: |
4984 | CMM_STORE_SHARED(recv_child_signal, 1); | |
4985 | break; | |
cf3af59e MD |
4986 | default: |
4987 | break; | |
fac6795d | 4988 | } |
fac6795d DG |
4989 | } |
4990 | ||
4991 | /* | |
d063d709 | 4992 | * Setup signal handler for : |
1d4b027a | 4993 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 4994 | */ |
1d4b027a | 4995 | static int set_signal_handler(void) |
fac6795d | 4996 | { |
1d4b027a DG |
4997 | int ret = 0; |
4998 | struct sigaction sa; | |
4999 | sigset_t sigset; | |
fac6795d | 5000 | |
1d4b027a | 5001 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 5002 | PERROR("sigemptyset"); |
1d4b027a DG |
5003 | return ret; |
5004 | } | |
d6f42150 | 5005 | |
1d4b027a DG |
5006 | sa.sa_handler = sighandler; |
5007 | sa.sa_mask = sigset; | |
5008 | sa.sa_flags = 0; | |
5009 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 5010 | PERROR("sigaction"); |
1d4b027a | 5011 | return ret; |
d6f42150 DG |
5012 | } |
5013 | ||
1d4b027a | 5014 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 5015 | PERROR("sigaction"); |
1d4b027a | 5016 | return ret; |
d6f42150 | 5017 | } |
aaf26714 | 5018 | |
1d4b027a | 5019 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 5020 | PERROR("sigaction"); |
1d4b027a | 5021 | return ret; |
8c0faa1d DG |
5022 | } |
5023 | ||
0bb7724a DG |
5024 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
5025 | PERROR("sigaction"); | |
5026 | return ret; | |
5027 | } | |
5028 | ||
5029 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
5030 | |
5031 | return ret; | |
fac6795d DG |
5032 | } |
5033 | ||
f3ed775e | 5034 | /* |
d063d709 DG |
5035 | * Set open files limit to unlimited. This daemon can open a large number of |
5036 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
5037 | */ |
5038 | static void set_ulimit(void) | |
5039 | { | |
5040 | int ret; | |
5041 | struct rlimit lim; | |
5042 | ||
a88df331 | 5043 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
5044 | lim.rlim_cur = 65535; |
5045 | lim.rlim_max = 65535; | |
5046 | ||
5047 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
5048 | if (ret < 0) { | |
76d7553f | 5049 | PERROR("failed to set open files limit"); |
f3ed775e DG |
5050 | } |
5051 | } | |
5052 | ||
35f90c40 DG |
5053 | /* |
5054 | * Write pidfile using the rundir and opt_pidfile. | |
5055 | */ | |
5056 | static void write_pidfile(void) | |
5057 | { | |
5058 | int ret; | |
5059 | char pidfile_path[PATH_MAX]; | |
5060 | ||
5061 | assert(rundir); | |
5062 | ||
5063 | if (opt_pidfile) { | |
5064 | strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path)); | |
5065 | } else { | |
5066 | /* Build pidfile path from rundir and opt_pidfile. */ | |
5067 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
5068 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
5069 | if (ret < 0) { | |
5070 | PERROR("snprintf pidfile path"); | |
5071 | goto error; | |
5072 | } | |
5073 | } | |
5074 | ||
5075 | /* | |
5076 | * Create pid file in rundir. Return value is of no importance. The | |
5077 | * execution will continue even though we are not able to write the file. | |
5078 | */ | |
5079 | (void) utils_create_pid_file(getpid(), pidfile_path); | |
5080 | ||
5081 | error: | |
5082 | return; | |
5083 | } | |
5084 | ||
c9cb3e7d JG |
5085 | /* |
5086 | * Create lockfile using the rundir and return its fd. | |
5087 | */ | |
5088 | static int create_lockfile(void) | |
5089 | { | |
5090 | int ret; | |
5091 | char lockfile_path[PATH_MAX]; | |
5092 | ||
5093 | ret = generate_lock_file_path(lockfile_path, sizeof(lockfile_path)); | |
5094 | if (ret < 0) { | |
5095 | goto error; | |
5096 | } | |
5097 | ||
5098 | ret = utils_create_lock_file(lockfile_path); | |
5099 | error: | |
5100 | return ret; | |
5101 | } | |
5102 | ||
cd9290dd | 5103 | /* |
022d91ba | 5104 | * Write agent TCP port using the rundir. |
cd9290dd | 5105 | */ |
022d91ba | 5106 | static void write_agent_port(void) |
cd9290dd DG |
5107 | { |
5108 | int ret; | |
5109 | char path[PATH_MAX]; | |
5110 | ||
5111 | assert(rundir); | |
5112 | ||
5113 | ret = snprintf(path, sizeof(path), "%s/" | |
022d91ba | 5114 | DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE, rundir); |
cd9290dd | 5115 | if (ret < 0) { |
022d91ba | 5116 | PERROR("snprintf agent port path"); |
cd9290dd DG |
5117 | goto error; |
5118 | } | |
5119 | ||
5120 | /* | |
022d91ba | 5121 | * Create TCP agent port file in rundir. Return value is of no importance. |
cd9290dd DG |
5122 | * The execution will continue even though we are not able to write the |
5123 | * file. | |
5124 | */ | |
022d91ba | 5125 | (void) utils_create_pid_file(agent_tcp_port, path); |
cd9290dd DG |
5126 | |
5127 | error: | |
5128 | return; | |
5129 | } | |
5130 | ||
ef367a93 JG |
5131 | /* |
5132 | * Start the load session thread and dettach from it so the main thread can | |
5133 | * continue. This does not return a value since whatever the outcome, the main | |
5134 | * thread will continue. | |
5135 | */ | |
5136 | static void start_load_session_thread(void) | |
5137 | { | |
5138 | int ret; | |
5139 | ||
5140 | /* Create session loading thread. */ | |
5141 | ret = pthread_create(&load_session_thread, NULL, thread_load_session, | |
5142 | load_info); | |
5143 | if (ret != 0) { | |
5144 | PERROR("pthread_create load_session_thread"); | |
5145 | goto error_create; | |
5146 | } | |
5147 | ||
5148 | ret = pthread_detach(load_session_thread); | |
5149 | if (ret != 0) { | |
5150 | PERROR("pthread_detach load_session_thread"); | |
5151 | } | |
5152 | ||
5153 | /* Everything went well so don't cleanup anything. */ | |
5154 | ||
5155 | error_create: | |
5156 | /* The cleanup() function will destroy the load_info data. */ | |
5157 | return; | |
5158 | } | |
5159 | ||
fac6795d DG |
5160 | /* |
5161 | * main | |
5162 | */ | |
5163 | int main(int argc, char **argv) | |
5164 | { | |
fac6795d DG |
5165 | int ret = 0; |
5166 | void *status; | |
ae9e45b3 | 5167 | const char *home_path, *env_app_timeout; |
fac6795d | 5168 | |
14436168 JG |
5169 | /* Initialize agent apps ht global variable */ |
5170 | agent_apps_ht_by_sock = NULL; | |
5171 | ||
335a95b7 MD |
5172 | init_kernel_workarounds(); |
5173 | ||
f6a9efaa DG |
5174 | rcu_register_thread(); |
5175 | ||
0bb7724a DG |
5176 | if ((ret = set_signal_handler()) < 0) { |
5177 | goto error; | |
5178 | } | |
5179 | ||
7753dea8 | 5180 | setup_consumerd_path(); |
fb09408a | 5181 | |
12744796 DG |
5182 | page_size = sysconf(_SC_PAGESIZE); |
5183 | if (page_size < 0) { | |
5184 | PERROR("sysconf _SC_PAGESIZE"); | |
5185 | page_size = LONG_MAX; | |
5186 | WARN("Fallback page size to %ld", page_size); | |
5187 | } | |
5188 | ||
26296c48 | 5189 | /* Parse arguments and load the daemon configuration file */ |
fac6795d | 5190 | progname = argv[0]; |
26296c48 | 5191 | if ((ret = set_options(argc, argv)) < 0) { |
cf3af59e | 5192 | goto error; |
fac6795d DG |
5193 | } |
5194 | ||
5195 | /* Daemonize */ | |
72dd7491 | 5196 | if (opt_daemon || opt_background) { |
ceed52b5 MD |
5197 | int i; |
5198 | ||
72dd7491 MD |
5199 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
5200 | !opt_background); | |
53094c05 | 5201 | if (ret < 0) { |
cf3af59e | 5202 | goto error; |
53094c05 | 5203 | } |
0bb7724a | 5204 | |
ceed52b5 | 5205 | /* |
0bb7724a DG |
5206 | * We are in the child. Make sure all other file descriptors are |
5207 | * closed, in case we are called with more opened file descriptors than | |
5208 | * the standard ones. | |
ceed52b5 MD |
5209 | */ |
5210 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
5211 | (void) close(i); | |
5212 | } | |
5213 | } | |
5214 | ||
5215 | /* Create thread quit pipe */ | |
5216 | if ((ret = init_thread_quit_pipe()) < 0) { | |
5217 | goto error; | |
fac6795d DG |
5218 | } |
5219 | ||
5220 | /* Check if daemon is UID = 0 */ | |
5221 | is_root = !getuid(); | |
5222 | ||
fac6795d | 5223 | if (is_root) { |
990570ed | 5224 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
ec7ef06e MD |
5225 | if (!rundir) { |
5226 | ret = -ENOMEM; | |
5227 | goto error; | |
5228 | } | |
67e40797 DG |
5229 | |
5230 | /* Create global run dir with root access */ | |
5231 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 5232 | if (ret < 0) { |
cf3af59e | 5233 | goto error; |
d6f42150 DG |
5234 | } |
5235 | ||
fac6795d | 5236 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
5237 | snprintf(apps_unix_sock_path, PATH_MAX, |
5238 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
5239 | } |
5240 | ||
5241 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
5242 | snprintf(client_unix_sock_path, PATH_MAX, |
5243 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
5244 | } | |
0fdd1e2c DG |
5245 | |
5246 | /* Set global SHM for ust */ | |
5247 | if (strlen(wait_shm_path) == 0) { | |
5248 | snprintf(wait_shm_path, PATH_MAX, | |
5249 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
5250 | } | |
67e40797 | 5251 | |
44a5e5eb DG |
5252 | if (strlen(health_unix_sock_path) == 0) { |
5253 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
5254 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); | |
5255 | } | |
5256 | ||
67e40797 DG |
5257 | /* Setup kernel consumerd path */ |
5258 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 5259 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 5260 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 5261 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
5262 | |
5263 | DBG2("Kernel consumer err path: %s", | |
5264 | kconsumer_data.err_unix_sock_path); | |
5265 | DBG2("Kernel consumer cmd path: %s", | |
5266 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 5267 | } else { |
feb0f3e5 | 5268 | home_path = utils_get_home_dir(); |
b082db07 | 5269 | if (home_path == NULL) { |
273ea72c DG |
5270 | /* TODO: Add --socket PATH option */ |
5271 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
5272 | ret = -EPERM; |
5273 | goto error; | |
b082db07 DG |
5274 | } |
5275 | ||
67e40797 DG |
5276 | /* |
5277 | * Create rundir from home path. This will create something like | |
5278 | * $HOME/.lttng | |
5279 | */ | |
990570ed | 5280 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
5281 | if (ret < 0) { |
5282 | ret = -ENOMEM; | |
5283 | goto error; | |
5284 | } | |
5285 | ||
5286 | ret = create_lttng_rundir(rundir); | |
5287 | if (ret < 0) { | |
5288 | goto error; | |
5289 | } | |
5290 | ||
fac6795d | 5291 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 5292 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 5293 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
5294 | } |
5295 | ||
5296 | /* Set the cli tool unix socket path */ | |
5297 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 5298 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 5299 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 5300 | } |
0fdd1e2c DG |
5301 | |
5302 | /* Set global SHM for ust */ | |
5303 | if (strlen(wait_shm_path) == 0) { | |
5304 | snprintf(wait_shm_path, PATH_MAX, | |
d0b96690 | 5305 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid()); |
0fdd1e2c | 5306 | } |
44a5e5eb DG |
5307 | |
5308 | /* Set health check Unix path */ | |
5309 | if (strlen(health_unix_sock_path) == 0) { | |
5310 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
5311 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path); | |
5312 | } | |
fac6795d DG |
5313 | } |
5314 | ||
c9cb3e7d JG |
5315 | lockfile_fd = create_lockfile(); |
5316 | if (lockfile_fd < 0) { | |
5317 | goto error; | |
5318 | } | |
5319 | ||
5c827ce0 DG |
5320 | /* Set consumer initial state */ |
5321 | kernel_consumerd_state = CONSUMER_STOPPED; | |
5322 | ust_consumerd_state = CONSUMER_STOPPED; | |
5323 | ||
847177cd DG |
5324 | DBG("Client socket path %s", client_unix_sock_path); |
5325 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 5326 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
5327 | DBG("LTTng run directory path: %s", rundir); |
5328 | ||
5329 | /* 32 bits consumerd path setup */ | |
5330 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 5331 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 5332 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 5333 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
5334 | |
5335 | DBG2("UST consumer 32 bits err path: %s", | |
5336 | ustconsumer32_data.err_unix_sock_path); | |
5337 | DBG2("UST consumer 32 bits cmd path: %s", | |
5338 | ustconsumer32_data.cmd_unix_sock_path); | |
5339 | ||
5340 | /* 64 bits consumerd path setup */ | |
5341 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 5342 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 5343 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 5344 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
5345 | |
5346 | DBG2("UST consumer 64 bits err path: %s", | |
5347 | ustconsumer64_data.err_unix_sock_path); | |
5348 | DBG2("UST consumer 64 bits cmd path: %s", | |
5349 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 5350 | |
273ea72c | 5351 | /* |
7d8234d9 | 5352 | * See if daemon already exist. |
fac6795d | 5353 | */ |
7d8234d9 | 5354 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 5355 | ERR("Already running daemon.\n"); |
273ea72c | 5356 | /* |
cf3af59e MD |
5357 | * We do not goto exit because we must not cleanup() |
5358 | * because a daemon is already running. | |
ab118b20 | 5359 | */ |
cf3af59e | 5360 | goto error; |
a88df331 DG |
5361 | } |
5362 | ||
db17cf0e JG |
5363 | /* After this point, we can safely call cleanup() with "goto exit" */ |
5364 | ||
1427f9b2 DG |
5365 | /* |
5366 | * Init UST app hash table. Alloc hash table before this point since | |
5367 | * cleanup() can get called after that point. | |
5368 | */ | |
5369 | ust_app_ht_alloc(); | |
5370 | ||
db17cf0e JG |
5371 | /* |
5372 | * Initialize agent app hash table. We allocate the hash table here | |
5373 | * since cleanup() can get called after this point. | |
5374 | */ | |
5375 | if (agent_app_ht_alloc()) { | |
5376 | ERR("Failed to allocate Agent app hash table"); | |
5377 | ret = -1; | |
5378 | goto exit; | |
f20baf8e DG |
5379 | } |
5380 | ||
a88df331 DG |
5381 | /* |
5382 | * These actions must be executed as root. We do that *after* setting up | |
5383 | * the sockets path because we MUST make the check for another daemon using | |
5384 | * those paths *before* trying to set the kernel consumer sockets and init | |
5385 | * kernel tracer. | |
5386 | */ | |
5387 | if (is_root) { | |
67e40797 | 5388 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
5389 | if (ret < 0) { |
5390 | goto exit; | |
5391 | } | |
5392 | ||
a88df331 | 5393 | /* Setup kernel tracer */ |
4fba7219 DG |
5394 | if (!opt_no_kernel) { |
5395 | init_kernel_tracer(); | |
89588270 DG |
5396 | if (kernel_tracer_fd >= 0) { |
5397 | ret = syscall_init_table(); | |
5398 | if (ret < 0) { | |
5399 | ERR("Unable to populate syscall table. Syscall tracing" | |
5400 | " won't work for this session daemon."); | |
5401 | } | |
834978fd | 5402 | } |
4fba7219 | 5403 | } |
a88df331 DG |
5404 | |
5405 | /* Set ulimit for open files */ | |
5406 | set_ulimit(); | |
fac6795d | 5407 | } |
4063050c MD |
5408 | /* init lttng_fd tracking must be done after set_ulimit. */ |
5409 | lttng_fd_init(); | |
fac6795d | 5410 | |
67e40797 DG |
5411 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
5412 | if (ret < 0) { | |
5413 | goto exit; | |
5414 | } | |
5415 | ||
5416 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
5417 | if (ret < 0) { | |
5418 | goto exit; | |
5419 | } | |
5420 | ||
d6f42150 | 5421 | /* Setup the needed unix socket */ |
cf3af59e MD |
5422 | if ((ret = init_daemon_socket()) < 0) { |
5423 | goto exit; | |
fac6795d DG |
5424 | } |
5425 | ||
5426 | /* Set credentials to socket */ | |
be040666 | 5427 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 5428 | goto exit; |
fac6795d DG |
5429 | } |
5430 | ||
5b8719f5 DG |
5431 | /* Get parent pid if -S, --sig-parent is specified. */ |
5432 | if (opt_sig_parent) { | |
5433 | ppid = getppid(); | |
5434 | } | |
5435 | ||
7a485870 | 5436 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 DG |
5437 | if (is_root && !opt_no_kernel) { |
5438 | if ((ret = utils_create_pipe_cloexec(kernel_poll_pipe)) < 0) { | |
5439 | goto exit; | |
5440 | } | |
7a485870 DG |
5441 | } |
5442 | ||
0b2dc8df MD |
5443 | /* Setup the thread ht_cleanup communication pipe. */ |
5444 | if (utils_create_pipe_cloexec(ht_cleanup_pipe) < 0) { | |
5445 | goto exit; | |
5446 | } | |
5447 | ||
099e26bd | 5448 | /* Setup the thread apps communication pipe. */ |
ef599319 | 5449 | if ((ret = utils_create_pipe_cloexec(apps_cmd_pipe)) < 0) { |
099e26bd DG |
5450 | goto exit; |
5451 | } | |
5452 | ||
d0b96690 DG |
5453 | /* Setup the thread apps notify communication pipe. */ |
5454 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe) < 0) { | |
5455 | goto exit; | |
5456 | } | |
5457 | ||
7972aab2 DG |
5458 | /* Initialize global buffer per UID and PID registry. */ |
5459 | buffer_reg_init_uid_registry(); | |
5460 | buffer_reg_init_pid_registry(); | |
5461 | ||
099e26bd | 5462 | /* Init UST command queue. */ |
8bdee6e2 | 5463 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 5464 | |
273ea72c | 5465 | /* |
54d01ffb DG |
5466 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
5467 | * statically declared in session.c | |
273ea72c | 5468 | */ |
54d01ffb | 5469 | session_list_ptr = session_get_list(); |
b5541356 | 5470 | |
5eb91c98 DG |
5471 | /* Set up max poll set size */ |
5472 | lttng_poll_set_max_size(); | |
5473 | ||
2f77fc4b | 5474 | cmd_init(); |
00e2e675 | 5475 | |
ae9e45b3 DG |
5476 | /* Check for the application socket timeout env variable. */ |
5477 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
5478 | if (env_app_timeout) { | |
5479 | app_socket_timeout = atoi(env_app_timeout); | |
5480 | } else { | |
5481 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
5482 | } | |
5483 | ||
35f90c40 | 5484 | write_pidfile(); |
022d91ba | 5485 | write_agent_port(); |
35f90c40 | 5486 | |
554831e7 MD |
5487 | /* Initialize communication library */ |
5488 | lttcomm_init(); | |
d831c249 DG |
5489 | /* This is to get the TCP timeout value. */ |
5490 | lttcomm_inet_init(); | |
554831e7 | 5491 | |
ef367a93 JG |
5492 | if (load_session_init_data(&load_info) < 0) { |
5493 | goto exit; | |
5494 | } | |
5495 | load_info->path = opt_load_session_path; | |
5496 | ||
67e05644 DG |
5497 | /* |
5498 | * Initialize the health check subsystem. This call should set the | |
5499 | * appropriate time values. | |
5500 | */ | |
6c71277b | 5501 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); |
8782cc74 MD |
5502 | if (!health_sessiond) { |
5503 | PERROR("health_app_create error"); | |
5504 | goto exit_health_sessiond_cleanup; | |
5505 | } | |
67e05644 | 5506 | |
d5b9fd2f | 5507 | /* Create thread to clean up RCU hash tables */ |
0b2dc8df MD |
5508 | ret = pthread_create(&ht_cleanup_thread, NULL, |
5509 | thread_ht_cleanup, (void *) NULL); | |
5510 | if (ret != 0) { | |
5511 | PERROR("pthread_create ht_cleanup"); | |
5512 | goto exit_ht_cleanup; | |
5513 | } | |
5514 | ||
d5b9fd2f | 5515 | /* Create health-check thread */ |
44a5e5eb DG |
5516 | ret = pthread_create(&health_thread, NULL, |
5517 | thread_manage_health, (void *) NULL); | |
5518 | if (ret != 0) { | |
5519 | PERROR("pthread_create health"); | |
5520 | goto exit_health; | |
5521 | } | |
5522 | ||
cf3af59e | 5523 | /* Create thread to manage the client socket */ |
099e26bd DG |
5524 | ret = pthread_create(&client_thread, NULL, |
5525 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 5526 | if (ret != 0) { |
76d7553f | 5527 | PERROR("pthread_create clients"); |
cf3af59e MD |
5528 | goto exit_client; |
5529 | } | |
fac6795d | 5530 | |
099e26bd DG |
5531 | /* Create thread to dispatch registration */ |
5532 | ret = pthread_create(&dispatch_thread, NULL, | |
5533 | thread_dispatch_ust_registration, (void *) NULL); | |
5534 | if (ret != 0) { | |
76d7553f | 5535 | PERROR("pthread_create dispatch"); |
099e26bd DG |
5536 | goto exit_dispatch; |
5537 | } | |
5538 | ||
5539 | /* Create thread to manage application registration. */ | |
5540 | ret = pthread_create(®_apps_thread, NULL, | |
5541 | thread_registration_apps, (void *) NULL); | |
5542 | if (ret != 0) { | |
76d7553f | 5543 | PERROR("pthread_create registration"); |
099e26bd DG |
5544 | goto exit_reg_apps; |
5545 | } | |
5546 | ||
cf3af59e | 5547 | /* Create thread to manage application socket */ |
54d01ffb DG |
5548 | ret = pthread_create(&apps_thread, NULL, |
5549 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 5550 | if (ret != 0) { |
d0b96690 DG |
5551 | PERROR("pthread_create apps"); |
5552 | goto exit_apps; | |
5553 | } | |
5554 | ||
5555 | /* Create thread to manage application notify socket */ | |
5556 | ret = pthread_create(&apps_notify_thread, NULL, | |
5557 | ust_thread_manage_notify, (void *) NULL); | |
5558 | if (ret != 0) { | |
f5c32ef1 | 5559 | PERROR("pthread_create notify"); |
9563b0ad | 5560 | goto exit_apps_notify; |
cf3af59e | 5561 | } |
fac6795d | 5562 | |
022d91ba DG |
5563 | /* Create agent registration thread. */ |
5564 | ret = pthread_create(&agent_reg_thread, NULL, | |
5565 | agent_thread_manage_registration, (void *) NULL); | |
4d076222 | 5566 | if (ret != 0) { |
022d91ba DG |
5567 | PERROR("pthread_create agent"); |
5568 | goto exit_agent_reg; | |
4d076222 DG |
5569 | } |
5570 | ||
6620da75 DG |
5571 | /* Don't start this thread if kernel tracing is not requested nor root */ |
5572 | if (is_root && !opt_no_kernel) { | |
5573 | /* Create kernel thread to manage kernel event */ | |
5574 | ret = pthread_create(&kernel_thread, NULL, | |
5575 | thread_manage_kernel, (void *) NULL); | |
5576 | if (ret != 0) { | |
5577 | PERROR("pthread_create kernel"); | |
5578 | goto exit_kernel; | |
5579 | } | |
ef367a93 | 5580 | } |
7a485870 | 5581 | |
ef367a93 JG |
5582 | /* Load possible session(s). */ |
5583 | start_load_session_thread(); | |
5584 | ||
5585 | if (is_root && !opt_no_kernel) { | |
6620da75 DG |
5586 | ret = pthread_join(kernel_thread, &status); |
5587 | if (ret != 0) { | |
5588 | PERROR("pthread_join"); | |
5589 | goto error; /* join error, exit without cleanup */ | |
5590 | } | |
fac6795d DG |
5591 | } |
5592 | ||
cf3af59e | 5593 | exit_kernel: |
022d91ba | 5594 | ret = pthread_join(agent_reg_thread, &status); |
4d076222 | 5595 | if (ret != 0) { |
022d91ba | 5596 | PERROR("pthread_join agent"); |
4d076222 DG |
5597 | goto error; /* join error, exit without cleanup */ |
5598 | } | |
5599 | ||
022d91ba | 5600 | exit_agent_reg: |
9563b0ad DG |
5601 | ret = pthread_join(apps_notify_thread, &status); |
5602 | if (ret != 0) { | |
5603 | PERROR("pthread_join apps notify"); | |
5604 | goto error; /* join error, exit without cleanup */ | |
5605 | } | |
5606 | ||
5607 | exit_apps_notify: | |
cf3af59e MD |
5608 | ret = pthread_join(apps_thread, &status); |
5609 | if (ret != 0) { | |
9563b0ad | 5610 | PERROR("pthread_join apps"); |
cf3af59e MD |
5611 | goto error; /* join error, exit without cleanup */ |
5612 | } | |
fac6795d | 5613 | |
4ccd8c8f | 5614 | |
cf3af59e | 5615 | exit_apps: |
099e26bd DG |
5616 | ret = pthread_join(reg_apps_thread, &status); |
5617 | if (ret != 0) { | |
76d7553f | 5618 | PERROR("pthread_join"); |
099e26bd DG |
5619 | goto error; /* join error, exit without cleanup */ |
5620 | } | |
5621 | ||
5622 | exit_reg_apps: | |
5623 | ret = pthread_join(dispatch_thread, &status); | |
5624 | if (ret != 0) { | |
76d7553f | 5625 | PERROR("pthread_join"); |
099e26bd DG |
5626 | goto error; /* join error, exit without cleanup */ |
5627 | } | |
5628 | ||
5629 | exit_dispatch: | |
cf3af59e MD |
5630 | ret = pthread_join(client_thread, &status); |
5631 | if (ret != 0) { | |
76d7553f | 5632 | PERROR("pthread_join"); |
cf3af59e MD |
5633 | goto error; /* join error, exit without cleanup */ |
5634 | } | |
5635 | ||
3bd1e081 | 5636 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 5637 | if (ret != 0) { |
76d7553f | 5638 | PERROR("join_consumer"); |
cf3af59e MD |
5639 | goto error; /* join error, exit without cleanup */ |
5640 | } | |
a88df331 | 5641 | |
06f525de DG |
5642 | ret = join_consumer_thread(&ustconsumer32_data); |
5643 | if (ret != 0) { | |
5644 | PERROR("join_consumer ust32"); | |
5645 | goto error; /* join error, exit without cleanup */ | |
5646 | } | |
5647 | ||
5648 | ret = join_consumer_thread(&ustconsumer64_data); | |
5649 | if (ret != 0) { | |
5650 | PERROR("join_consumer ust64"); | |
5651 | goto error; /* join error, exit without cleanup */ | |
5652 | } | |
5653 | ||
cf3af59e | 5654 | exit_client: |
06f525de DG |
5655 | ret = pthread_join(health_thread, &status); |
5656 | if (ret != 0) { | |
5657 | PERROR("pthread_join health thread"); | |
5658 | goto error; /* join error, exit without cleanup */ | |
5659 | } | |
5660 | ||
44a5e5eb | 5661 | exit_health: |
0b2dc8df MD |
5662 | ret = pthread_join(ht_cleanup_thread, &status); |
5663 | if (ret != 0) { | |
5664 | PERROR("pthread_join ht cleanup thread"); | |
5665 | goto error; /* join error, exit without cleanup */ | |
5666 | } | |
5667 | exit_ht_cleanup: | |
8782cc74 MD |
5668 | health_app_destroy(health_sessiond); |
5669 | exit_health_sessiond_cleanup: | |
a88df331 | 5670 | exit: |
cf3af59e MD |
5671 | /* |
5672 | * cleanup() is called when no other thread is running. | |
5673 | */ | |
f6a9efaa | 5674 | rcu_thread_online(); |
cf3af59e | 5675 | cleanup(); |
f6a9efaa DG |
5676 | rcu_thread_offline(); |
5677 | rcu_unregister_thread(); | |
45f862ca | 5678 | rcu_barrier(); |
67e40797 | 5679 | if (!ret) { |
cf3af59e | 5680 | exit(EXIT_SUCCESS); |
67e40797 | 5681 | } |
cf3af59e | 5682 | error: |
5e16da05 | 5683 | exit(EXIT_FAILURE); |
fac6795d | 5684 | } |