Commit | Line | Data |
---|---|---|
826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
fac6795d DG |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
82a3637f DG |
6 | * as published by the Free Software Foundation; only version 2 |
7 | * of the License. | |
91d76f53 | 8 | * |
fac6795d DG |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
91d76f53 | 13 | * |
fac6795d DG |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
fac6795d DG |
17 | */ |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <fcntl.h> | |
21 | #include <getopt.h> | |
22 | #include <grp.h> | |
23 | #include <limits.h> | |
7a485870 | 24 | #include <poll.h> |
fac6795d | 25 | #include <pthread.h> |
8c0faa1d | 26 | #include <semaphore.h> |
fac6795d DG |
27 | #include <signal.h> |
28 | #include <stdio.h> | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
31 | #include <sys/ipc.h> | |
b73401da | 32 | #include <sys/mount.h> |
fac6795d DG |
33 | #include <sys/shm.h> |
34 | #include <sys/socket.h> | |
35 | #include <sys/stat.h> | |
36 | #include <sys/types.h> | |
f3ed775e DG |
37 | #include <sys/time.h> |
38 | #include <sys/resource.h> | |
fac6795d DG |
39 | #include <unistd.h> |
40 | ||
41 | #include <urcu/list.h> /* URCU list library (-lurcu) */ | |
5b97ec60 | 42 | #include <lttng/lttng.h> |
fac6795d | 43 | |
b579acd9 | 44 | #include "context.h" |
fac6795d DG |
45 | #include "liblttsessiondcomm.h" |
46 | #include "ltt-sessiond.h" | |
75462a81 | 47 | #include "lttngerr.h" |
20fe2104 | 48 | #include "kernel-ctl.h" |
9e78d6ae | 49 | #include "ust-ctl.h" |
5b74c7b1 | 50 | #include "session.h" |
91d76f53 | 51 | #include "traceable-app.h" |
5dc18550 | 52 | #include "lttng-kconsumerd.h" |
8e68d1c8 | 53 | #include "utils.h" |
fac6795d | 54 | |
75462a81 | 55 | /* Const values */ |
686204ab | 56 | const char default_home_dir[] = DEFAULT_HOME_DIR; |
64a23ac4 | 57 | const char default_tracing_group[] = LTTNG_DEFAULT_TRACING_GROUP; |
686204ab MD |
58 | const char default_ust_sock_dir[] = DEFAULT_UST_SOCK_DIR; |
59 | const char default_global_apps_pipe[] = DEFAULT_GLOBAL_APPS_PIPE; | |
60 | ||
fac6795d | 61 | /* Variables */ |
1d4b027a DG |
62 | int opt_verbose; /* Not static for lttngerr.h */ |
63 | int opt_quiet; /* Not static for lttngerr.h */ | |
d063d709 | 64 | |
fac6795d DG |
65 | const char *progname; |
66 | const char *opt_tracing_group; | |
5b8719f5 | 67 | static int opt_sig_parent; |
fac6795d DG |
68 | static int opt_daemon; |
69 | static int is_root; /* Set to 1 if the daemon is running as root */ | |
1d4b027a DG |
70 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
71 | static pid_t kconsumerd_pid; | |
7a485870 | 72 | static struct pollfd *kernel_pollfd; |
fac6795d | 73 | |
d6f42150 DG |
74 | static char apps_unix_sock_path[PATH_MAX]; /* Global application Unix socket path */ |
75 | static char client_unix_sock_path[PATH_MAX]; /* Global client Unix socket path */ | |
76 | static char kconsumerd_err_unix_sock_path[PATH_MAX]; /* kconsumerd error Unix socket path */ | |
77 | static char kconsumerd_cmd_unix_sock_path[PATH_MAX]; /* kconsumerd command Unix socket path */ | |
fac6795d | 78 | |
1d4b027a | 79 | /* Sockets and FDs */ |
d6f42150 DG |
80 | static int client_sock; |
81 | static int apps_sock; | |
82 | static int kconsumerd_err_sock; | |
8c0faa1d | 83 | static int kconsumerd_cmd_sock; |
20fe2104 | 84 | static int kernel_tracer_fd; |
7a485870 | 85 | static int kernel_poll_pipe[2]; |
1d4b027a | 86 | |
273ea72c DG |
87 | /* |
88 | * Quit pipe for all threads. This permits a single cancellation point | |
89 | * for all threads when receiving an event on the pipe. | |
90 | */ | |
91 | static int thread_quit_pipe[2]; | |
92 | ||
1d4b027a | 93 | /* Pthread, Mutexes and Semaphores */ |
8c0faa1d | 94 | static pthread_t kconsumerd_thread; |
1d4b027a DG |
95 | static pthread_t apps_thread; |
96 | static pthread_t client_thread; | |
7a485870 | 97 | static pthread_t kernel_thread; |
8c0faa1d DG |
98 | static sem_t kconsumerd_sem; |
99 | ||
1d4b027a | 100 | static pthread_mutex_t kconsumerd_pid_mutex; /* Mutex to control kconsumerd pid assignation */ |
fac6795d | 101 | |
b5541356 DG |
102 | /* |
103 | * Pointer initialized before thread creation. | |
104 | * | |
105 | * This points to the tracing session list containing the session count and a | |
106 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
107 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 108 | * |
d063d709 DG |
109 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
110 | * lock_session_list and unlock_session_list for lock acquisition. | |
b5541356 DG |
111 | */ |
112 | static struct ltt_session_list *session_list_ptr; | |
113 | ||
273ea72c DG |
114 | /* |
115 | * Init quit pipe. | |
116 | * | |
117 | * Return -1 on error or 0 if all pipes are created. | |
118 | */ | |
119 | static int init_thread_quit_pipe(void) | |
120 | { | |
121 | int ret; | |
122 | ||
123 | ret = pipe2(thread_quit_pipe, O_CLOEXEC); | |
124 | if (ret < 0) { | |
125 | perror("thread quit pipe"); | |
126 | goto error; | |
127 | } | |
128 | ||
129 | error: | |
130 | return ret; | |
131 | } | |
132 | ||
fac6795d | 133 | /* |
d063d709 DG |
134 | * Complete teardown of a kernel session. This free all data structure related |
135 | * to a kernel session and update counter. | |
fac6795d | 136 | */ |
1d4b027a | 137 | static void teardown_kernel_session(struct ltt_session *session) |
fac6795d | 138 | { |
1d4b027a DG |
139 | if (session->kernel_session != NULL) { |
140 | DBG("Tearing down kernel session"); | |
c363b55d | 141 | trace_destroy_kernel_session(session->kernel_session); |
1d4b027a DG |
142 | /* Extra precaution */ |
143 | session->kernel_session = NULL; | |
fac6795d | 144 | } |
fac6795d DG |
145 | } |
146 | ||
147 | /* | |
d063d709 | 148 | * Cleanup the daemon |
fac6795d | 149 | */ |
1d4b027a | 150 | static void cleanup() |
fac6795d | 151 | { |
1d4b027a DG |
152 | int ret; |
153 | char *cmd; | |
af9737e9 | 154 | struct ltt_session *sess, *stmp; |
fac6795d | 155 | |
1d4b027a | 156 | DBG("Cleaning up"); |
e07ae692 | 157 | |
1d4b027a | 158 | /* <fun> */ |
273ea72c DG |
159 | MSG("\n%c[%d;%dm*** assert failed *** ==> %c[%dm%c[%d;%dm" |
160 | "Matthew, BEET driven development works!%c[%dm", | |
161 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
1d4b027a | 162 | /* </fun> */ |
fac6795d | 163 | |
1d4b027a DG |
164 | /* Stopping all threads */ |
165 | DBG("Terminating all threads"); | |
273ea72c DG |
166 | close(thread_quit_pipe[0]); |
167 | close(thread_quit_pipe[1]); | |
fac6795d | 168 | |
1d4b027a DG |
169 | DBG("Removing %s directory", LTTNG_RUNDIR); |
170 | ret = asprintf(&cmd, "rm -rf " LTTNG_RUNDIR); | |
171 | if (ret < 0) { | |
172 | ERR("asprintf failed. Something is really wrong!"); | |
173 | } | |
5461b305 | 174 | |
1d4b027a DG |
175 | /* Remove lttng run directory */ |
176 | ret = system(cmd); | |
177 | if (ret < 0) { | |
178 | ERR("Unable to clean " LTTNG_RUNDIR); | |
179 | } | |
5461b305 | 180 | |
1d4b027a | 181 | DBG("Cleaning up all session"); |
fac6795d | 182 | |
b5541356 | 183 | /* Destroy session list mutex */ |
273ea72c DG |
184 | if (session_list_ptr != NULL) { |
185 | pthread_mutex_destroy(&session_list_ptr->lock); | |
186 | ||
187 | /* Cleanup ALL session */ | |
af9737e9 | 188 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { |
273ea72c DG |
189 | teardown_kernel_session(sess); |
190 | // TODO complete session cleanup (including UST) | |
191 | } | |
192 | } | |
193 | ||
194 | pthread_mutex_destroy(&kconsumerd_pid_mutex); | |
b5541356 | 195 | |
f3ed775e | 196 | DBG("Closing kernel fd"); |
1d4b027a | 197 | close(kernel_tracer_fd); |
fac6795d DG |
198 | } |
199 | ||
e065084a | 200 | /* |
d063d709 | 201 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 202 | * |
d063d709 | 203 | * Return lttcomm error code. |
e065084a DG |
204 | */ |
205 | static int send_unix_sock(int sock, void *buf, size_t len) | |
206 | { | |
207 | /* Check valid length */ | |
208 | if (len <= 0) { | |
209 | return -1; | |
210 | } | |
211 | ||
212 | return lttcomm_send_unix_sock(sock, buf, len); | |
213 | } | |
214 | ||
5461b305 | 215 | /* |
d063d709 | 216 | * Free memory of a command context structure. |
5461b305 | 217 | */ |
a2fb29a5 | 218 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 219 | { |
a2fb29a5 DG |
220 | DBG("Clean command context structure"); |
221 | if (*cmd_ctx) { | |
222 | if ((*cmd_ctx)->llm) { | |
223 | free((*cmd_ctx)->llm); | |
5461b305 | 224 | } |
a2fb29a5 DG |
225 | if ((*cmd_ctx)->lsm) { |
226 | free((*cmd_ctx)->lsm); | |
5461b305 | 227 | } |
a2fb29a5 DG |
228 | free(*cmd_ctx); |
229 | *cmd_ctx = NULL; | |
5461b305 DG |
230 | } |
231 | } | |
232 | ||
f3ed775e | 233 | /* |
d063d709 | 234 | * Send all stream fds of kernel channel to the consumer. |
f3ed775e | 235 | */ |
7a485870 | 236 | static int send_kconsumerd_channel_fds(int sock, struct ltt_kernel_channel *channel) |
f3ed775e DG |
237 | { |
238 | int ret; | |
239 | size_t nb_fd; | |
240 | struct ltt_kernel_stream *stream; | |
f3ed775e DG |
241 | struct lttcomm_kconsumerd_header lkh; |
242 | struct lttcomm_kconsumerd_msg lkm; | |
243 | ||
7a485870 DG |
244 | DBG("Sending fds of channel %s to kernel consumer", channel->channel->name); |
245 | ||
246 | nb_fd = channel->stream_count; | |
f3ed775e DG |
247 | |
248 | /* Setup header */ | |
7a485870 | 249 | lkh.payload_size = nb_fd * sizeof(struct lttcomm_kconsumerd_msg); |
f3ed775e DG |
250 | lkh.cmd_type = ADD_STREAM; |
251 | ||
252 | DBG("Sending kconsumerd header"); | |
253 | ||
254 | ret = lttcomm_send_unix_sock(sock, &lkh, sizeof(struct lttcomm_kconsumerd_header)); | |
255 | if (ret < 0) { | |
256 | perror("send kconsumerd header"); | |
257 | goto error; | |
258 | } | |
259 | ||
7a485870 DG |
260 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { |
261 | if (stream->fd != 0) { | |
f3ed775e DG |
262 | lkm.fd = stream->fd; |
263 | lkm.state = stream->state; | |
7a485870 | 264 | lkm.max_sb_size = channel->channel->attr.subbuf_size; |
f3ed775e DG |
265 | strncpy(lkm.path_name, stream->pathname, PATH_MAX); |
266 | ||
267 | DBG("Sending fd %d to kconsumerd", lkm.fd); | |
268 | ||
269 | ret = lttcomm_send_fds_unix_sock(sock, &lkm, &lkm.fd, 1, sizeof(lkm)); | |
270 | if (ret < 0) { | |
271 | perror("send kconsumerd fd"); | |
272 | goto error; | |
273 | } | |
274 | } | |
275 | } | |
276 | ||
7a485870 | 277 | DBG("Kconsumerd channel fds sent"); |
f3ed775e DG |
278 | |
279 | return 0; | |
280 | ||
281 | error: | |
282 | return ret; | |
283 | } | |
284 | ||
285 | /* | |
d063d709 | 286 | * Send all stream fds of the kernel session to the consumer. |
f3ed775e | 287 | */ |
7a485870 | 288 | static int send_kconsumerd_fds(int sock, struct ltt_kernel_session *session) |
f3ed775e DG |
289 | { |
290 | int ret; | |
291 | struct ltt_kernel_channel *chan; | |
7a485870 DG |
292 | struct lttcomm_kconsumerd_header lkh; |
293 | struct lttcomm_kconsumerd_msg lkm; | |
294 | ||
295 | /* Setup header */ | |
296 | lkh.payload_size = sizeof(struct lttcomm_kconsumerd_msg); | |
297 | lkh.cmd_type = ADD_STREAM; | |
298 | ||
299 | DBG("Sending kconsumerd header for metadata"); | |
300 | ||
301 | ret = lttcomm_send_unix_sock(sock, &lkh, sizeof(struct lttcomm_kconsumerd_header)); | |
302 | if (ret < 0) { | |
303 | perror("send kconsumerd header"); | |
304 | goto error; | |
305 | } | |
306 | ||
307 | DBG("Sending metadata stream fd"); | |
308 | ||
309 | if (session->metadata_stream_fd != 0) { | |
310 | /* Send metadata stream fd first */ | |
311 | lkm.fd = session->metadata_stream_fd; | |
312 | lkm.state = ACTIVE_FD; | |
313 | lkm.max_sb_size = session->metadata->conf->attr.subbuf_size; | |
314 | strncpy(lkm.path_name, session->metadata->pathname, PATH_MAX); | |
315 | ||
316 | ret = lttcomm_send_fds_unix_sock(sock, &lkm, &lkm.fd, 1, sizeof(lkm)); | |
317 | if (ret < 0) { | |
318 | perror("send kconsumerd fd"); | |
319 | goto error; | |
320 | } | |
321 | } | |
f3ed775e | 322 | |
f3ed775e | 323 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
7a485870 | 324 | ret = send_kconsumerd_channel_fds(sock, chan); |
f3ed775e | 325 | if (ret < 0) { |
7a485870 | 326 | goto error; |
f3ed775e DG |
327 | } |
328 | } | |
329 | ||
7a485870 DG |
330 | DBG("Kconsumerd fds (metadata and channel streams) sent"); |
331 | ||
f3ed775e DG |
332 | return 0; |
333 | ||
334 | error: | |
335 | return ret; | |
336 | } | |
337 | ||
97b1a726 | 338 | #ifdef DISABLED |
fac6795d | 339 | /* |
d063d709 DG |
340 | * Return a socket connected to the libust communication socket of the |
341 | * application identified by the pid. | |
fac6795d | 342 | * |
d063d709 | 343 | * If the pid is not found in the traceable list, return -1 to indicate error. |
fac6795d | 344 | */ |
471d1693 | 345 | static int ust_connect_app(pid_t pid) |
fac6795d | 346 | { |
91d76f53 DG |
347 | int sock; |
348 | struct ltt_traceable_app *lta; | |
379473d2 | 349 | |
e07ae692 DG |
350 | DBG("Connect to application pid %d", pid); |
351 | ||
91d76f53 DG |
352 | lta = find_app_by_pid(pid); |
353 | if (lta == NULL) { | |
354 | /* App not found */ | |
7442b2ba | 355 | DBG("Application pid %d not found", pid); |
379473d2 DG |
356 | return -1; |
357 | } | |
fac6795d | 358 | |
91d76f53 | 359 | sock = ustctl_connect_pid(lta->pid); |
fac6795d | 360 | if (sock < 0) { |
62d3069f | 361 | ERR("Fail connecting to the PID %d", pid); |
fac6795d DG |
362 | } |
363 | ||
364 | return sock; | |
365 | } | |
97b1a726 | 366 | #endif /* DISABLED */ |
fac6795d DG |
367 | |
368 | /* | |
d063d709 DG |
369 | * Notify apps by writing 42 to a named pipe using name. Every applications |
370 | * waiting for a ltt-sessiond will be notified and re-register automatically to | |
371 | * the session daemon. | |
fac6795d | 372 | * |
d063d709 | 373 | * Return open or write error value. |
fac6795d DG |
374 | */ |
375 | static int notify_apps(const char *name) | |
376 | { | |
377 | int fd; | |
378 | int ret = -1; | |
379 | ||
e07ae692 DG |
380 | DBG("Notify the global application pipe"); |
381 | ||
fac6795d DG |
382 | /* Try opening the global pipe */ |
383 | fd = open(name, O_WRONLY); | |
384 | if (fd < 0) { | |
385 | goto error; | |
386 | } | |
387 | ||
388 | /* Notify by writing on the pipe */ | |
389 | ret = write(fd, "42", 2); | |
390 | if (ret < 0) { | |
391 | perror("write"); | |
392 | } | |
393 | ||
394 | error: | |
395 | return ret; | |
396 | } | |
397 | ||
e065084a | 398 | /* |
d063d709 DG |
399 | * Setup the outgoing data buffer for the response (llm) by allocating the |
400 | * right amount of memory and copying the original information from the lsm | |
401 | * structure. | |
ca95a216 | 402 | * |
d063d709 | 403 | * Return total size of the buffer pointed by buf. |
ca95a216 | 404 | */ |
5461b305 | 405 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 406 | { |
f3ed775e | 407 | int ret, buf_size; |
ca95a216 | 408 | |
f3ed775e | 409 | buf_size = size; |
5461b305 DG |
410 | |
411 | cmd_ctx->llm = malloc(sizeof(struct lttcomm_lttng_msg) + buf_size); | |
412 | if (cmd_ctx->llm == NULL) { | |
ca95a216 | 413 | perror("malloc"); |
5461b305 | 414 | ret = -ENOMEM; |
ca95a216 DG |
415 | goto error; |
416 | } | |
417 | ||
5461b305 DG |
418 | /* Copy common data */ |
419 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 420 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 421 | |
5461b305 DG |
422 | cmd_ctx->llm->data_size = size; |
423 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
424 | ||
ca95a216 DG |
425 | return buf_size; |
426 | ||
427 | error: | |
428 | return ret; | |
429 | } | |
430 | ||
7a485870 | 431 | /* |
d063d709 DG |
432 | * Update the kernel pollfd set of all channel fd available over all tracing |
433 | * session. Add the wakeup pipe at the end of the set. | |
7a485870 DG |
434 | */ |
435 | static int update_kernel_pollfd(void) | |
436 | { | |
437 | int i = 0; | |
273ea72c DG |
438 | /* |
439 | * The wakup pipe and the quit pipe are needed so the number of fds starts | |
440 | * at 2 for those pipes. | |
441 | */ | |
442 | unsigned int nb_fd = 2; | |
7a485870 DG |
443 | struct ltt_session *session; |
444 | struct ltt_kernel_channel *channel; | |
445 | ||
446 | DBG("Updating kernel_pollfd"); | |
447 | ||
448 | /* Get the number of channel of all kernel session */ | |
6c9cc2ab | 449 | lock_session_list(); |
b5541356 DG |
450 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
451 | lock_session(session); | |
7a485870 | 452 | if (session->kernel_session == NULL) { |
b5541356 | 453 | unlock_session(session); |
7a485870 DG |
454 | continue; |
455 | } | |
456 | nb_fd += session->kernel_session->channel_count; | |
b5541356 | 457 | unlock_session(session); |
7a485870 DG |
458 | } |
459 | ||
460 | DBG("Resizing kernel_pollfd to size %d", nb_fd); | |
461 | ||
462 | kernel_pollfd = realloc(kernel_pollfd, nb_fd * sizeof(struct pollfd)); | |
463 | if (kernel_pollfd == NULL) { | |
464 | perror("malloc kernel_pollfd"); | |
465 | goto error; | |
466 | } | |
467 | ||
b5541356 DG |
468 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
469 | lock_session(session); | |
7a485870 | 470 | if (session->kernel_session == NULL) { |
b5541356 | 471 | unlock_session(session); |
7a485870 DG |
472 | continue; |
473 | } | |
474 | if (i >= nb_fd) { | |
475 | ERR("To much channel for kernel_pollfd size"); | |
b5541356 | 476 | unlock_session(session); |
7a485870 DG |
477 | break; |
478 | } | |
479 | cds_list_for_each_entry(channel, &session->kernel_session->channel_list.head, list) { | |
480 | kernel_pollfd[i].fd = channel->fd; | |
481 | kernel_pollfd[i].events = POLLIN | POLLRDNORM; | |
482 | i++; | |
483 | } | |
b5541356 | 484 | unlock_session(session); |
7a485870 | 485 | } |
6c9cc2ab | 486 | unlock_session_list(); |
7a485870 DG |
487 | |
488 | /* Adding wake up pipe */ | |
273ea72c DG |
489 | kernel_pollfd[nb_fd - 2].fd = kernel_poll_pipe[0]; |
490 | kernel_pollfd[nb_fd - 2].events = POLLIN; | |
491 | ||
492 | /* Adding the quit pipe */ | |
493 | kernel_pollfd[nb_fd - 1].fd = thread_quit_pipe[0]; | |
7a485870 DG |
494 | |
495 | return nb_fd; | |
496 | ||
497 | error: | |
6c9cc2ab | 498 | unlock_session_list(); |
7a485870 DG |
499 | return -1; |
500 | } | |
501 | ||
502 | /* | |
d063d709 DG |
503 | * Find the channel fd from 'fd' over all tracing session. When found, check |
504 | * for new channel stream and send those stream fds to the kernel consumer. | |
7a485870 | 505 | * |
d063d709 | 506 | * Useful for CPU hotplug feature. |
7a485870 DG |
507 | */ |
508 | static int update_kernel_stream(int fd) | |
509 | { | |
510 | int ret = 0; | |
511 | struct ltt_session *session; | |
512 | struct ltt_kernel_channel *channel; | |
513 | ||
514 | DBG("Updating kernel streams for channel fd %d", fd); | |
515 | ||
6c9cc2ab | 516 | lock_session_list(); |
b5541356 DG |
517 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
518 | lock_session(session); | |
7a485870 | 519 | if (session->kernel_session == NULL) { |
b5541356 | 520 | unlock_session(session); |
7a485870 DG |
521 | continue; |
522 | } | |
523 | cds_list_for_each_entry(channel, &session->kernel_session->channel_list.head, list) { | |
524 | if (channel->fd == fd) { | |
525 | DBG("Channel found, updating kernel streams"); | |
526 | ret = kernel_open_channel_stream(channel); | |
527 | if (ret < 0) { | |
528 | goto end; | |
529 | } | |
530 | /* | |
531 | * Have we already sent fds to the consumer? If yes, it means that | |
532 | * tracing is started so it is safe to send our updated stream fds. | |
533 | */ | |
534 | if (session->kernel_session->kconsumer_fds_sent == 1) { | |
535 | ret = send_kconsumerd_channel_fds(kconsumerd_cmd_sock, channel); | |
536 | if (ret < 0) { | |
537 | goto end; | |
538 | } | |
539 | } | |
540 | goto end; | |
541 | } | |
542 | } | |
b5541356 | 543 | unlock_session(session); |
7a485870 DG |
544 | } |
545 | ||
546 | end: | |
6c9cc2ab | 547 | unlock_session_list(); |
b5541356 DG |
548 | if (session) { |
549 | unlock_session(session); | |
550 | } | |
7a485870 DG |
551 | return ret; |
552 | } | |
553 | ||
554 | /* | |
d063d709 | 555 | * This thread manage event coming from the kernel. |
7a485870 | 556 | * |
d063d709 DG |
557 | * Features supported in this thread: |
558 | * -) CPU Hotplug | |
7a485870 DG |
559 | */ |
560 | static void *thread_manage_kernel(void *data) | |
561 | { | |
562 | int ret, i, nb_fd = 0; | |
563 | char tmp; | |
564 | int update_poll_flag = 1; | |
565 | ||
566 | DBG("Thread manage kernel started"); | |
567 | ||
568 | while (1) { | |
569 | if (update_poll_flag == 1) { | |
570 | nb_fd = update_kernel_pollfd(); | |
571 | if (nb_fd < 0) { | |
572 | goto error; | |
573 | } | |
574 | update_poll_flag = 0; | |
575 | } | |
576 | ||
577 | DBG("Polling on %d fds", nb_fd); | |
578 | ||
579 | /* Poll infinite value of time */ | |
580 | ret = poll(kernel_pollfd, nb_fd, -1); | |
581 | if (ret < 0) { | |
582 | perror("poll kernel thread"); | |
583 | goto error; | |
584 | } else if (ret == 0) { | |
585 | /* Should not happen since timeout is infinite */ | |
586 | continue; | |
587 | } | |
588 | ||
273ea72c DG |
589 | /* Thread quit pipe has been closed. Killing thread. */ |
590 | if (kernel_pollfd[nb_fd - 1].revents == POLLNVAL) { | |
591 | goto error; | |
592 | } | |
593 | ||
7a485870 DG |
594 | DBG("Kernel poll event triggered"); |
595 | ||
596 | /* | |
597 | * Check if the wake up pipe was triggered. If so, the kernel_pollfd | |
598 | * must be updated. | |
599 | */ | |
273ea72c | 600 | switch (kernel_pollfd[nb_fd - 2].revents) { |
b5541356 | 601 | case POLLIN: |
7a485870 DG |
602 | ret = read(kernel_poll_pipe[0], &tmp, 1); |
603 | update_poll_flag = 1; | |
604 | continue; | |
b5541356 DG |
605 | case POLLERR: |
606 | goto error; | |
607 | default: | |
608 | break; | |
7a485870 DG |
609 | } |
610 | ||
611 | for (i = 0; i < nb_fd; i++) { | |
612 | switch (kernel_pollfd[i].revents) { | |
613 | /* | |
614 | * New CPU detected by the kernel. Adding kernel stream to kernel | |
615 | * session and updating the kernel consumer | |
616 | */ | |
617 | case POLLIN | POLLRDNORM: | |
618 | ret = update_kernel_stream(kernel_pollfd[i].fd); | |
619 | if (ret < 0) { | |
620 | continue; | |
621 | } | |
622 | break; | |
623 | } | |
624 | } | |
625 | } | |
626 | ||
627 | error: | |
628 | DBG("Kernel thread dying"); | |
629 | if (kernel_pollfd) { | |
630 | free(kernel_pollfd); | |
631 | } | |
273ea72c DG |
632 | |
633 | close(kernel_poll_pipe[0]); | |
634 | close(kernel_poll_pipe[1]); | |
7a485870 DG |
635 | return NULL; |
636 | } | |
637 | ||
1d4b027a | 638 | /* |
d063d709 | 639 | * This thread manage the kconsumerd error sent back to the session daemon. |
1d4b027a DG |
640 | */ |
641 | static void *thread_manage_kconsumerd(void *data) | |
642 | { | |
273ea72c | 643 | int sock = 0, ret; |
1d4b027a | 644 | enum lttcomm_return_code code; |
273ea72c | 645 | struct pollfd pollfd[2]; |
1d4b027a DG |
646 | |
647 | DBG("[thread] Manage kconsumerd started"); | |
648 | ||
649 | ret = lttcomm_listen_unix_sock(kconsumerd_err_sock); | |
650 | if (ret < 0) { | |
651 | goto error; | |
652 | } | |
653 | ||
273ea72c DG |
654 | /* First fd is always the quit pipe */ |
655 | pollfd[0].fd = thread_quit_pipe[0]; | |
656 | ||
657 | /* Apps socket */ | |
658 | pollfd[1].fd = kconsumerd_err_sock; | |
659 | pollfd[1].events = POLLIN; | |
660 | ||
661 | /* Inifinite blocking call, waiting for transmission */ | |
662 | ret = poll(pollfd, 2, -1); | |
663 | if (ret < 0) { | |
664 | perror("poll kconsumerd thread"); | |
665 | goto error; | |
666 | } | |
667 | ||
668 | /* Thread quit pipe has been closed. Killing thread. */ | |
669 | if (pollfd[0].revents == POLLNVAL) { | |
670 | goto error; | |
671 | } else if (pollfd[1].revents == POLLERR) { | |
672 | ERR("Kconsumerd err socket poll error"); | |
673 | goto error; | |
674 | } | |
675 | ||
1d4b027a DG |
676 | sock = lttcomm_accept_unix_sock(kconsumerd_err_sock); |
677 | if (sock < 0) { | |
678 | goto error; | |
679 | } | |
680 | ||
712ea556 | 681 | /* Getting status code from kconsumerd */ |
1d4b027a DG |
682 | ret = lttcomm_recv_unix_sock(sock, &code, sizeof(enum lttcomm_return_code)); |
683 | if (ret <= 0) { | |
684 | goto error; | |
685 | } | |
686 | ||
687 | if (code == KCONSUMERD_COMMAND_SOCK_READY) { | |
688 | kconsumerd_cmd_sock = lttcomm_connect_unix_sock(kconsumerd_cmd_unix_sock_path); | |
689 | if (kconsumerd_cmd_sock < 0) { | |
712ea556 | 690 | sem_post(&kconsumerd_sem); |
1d4b027a DG |
691 | perror("kconsumerd connect"); |
692 | goto error; | |
693 | } | |
694 | /* Signal condition to tell that the kconsumerd is ready */ | |
695 | sem_post(&kconsumerd_sem); | |
696 | DBG("Kconsumerd command socket ready"); | |
697 | } else { | |
6f61d021 | 698 | DBG("Kconsumerd error when waiting for SOCK_READY : %s", |
1d4b027a DG |
699 | lttcomm_get_readable_code(-code)); |
700 | goto error; | |
701 | } | |
702 | ||
712ea556 DG |
703 | /* Wait for any kconsumerd error */ |
704 | ret = lttcomm_recv_unix_sock(sock, &code, sizeof(enum lttcomm_return_code)); | |
705 | if (ret <= 0) { | |
706 | ERR("Kconsumerd closed the command socket"); | |
707 | goto error; | |
6f61d021 | 708 | } |
1d4b027a | 709 | |
712ea556 DG |
710 | ERR("Kconsumerd return code : %s", lttcomm_get_readable_code(-code)); |
711 | ||
1d4b027a | 712 | error: |
6f61d021 | 713 | DBG("Kconsumerd thread dying"); |
273ea72c DG |
714 | if (kconsumerd_err_sock) { |
715 | close(kconsumerd_err_sock); | |
716 | } | |
717 | if (kconsumerd_cmd_sock) { | |
718 | close(kconsumerd_cmd_sock); | |
719 | } | |
720 | if (sock) { | |
721 | close(sock); | |
722 | } | |
723 | ||
724 | unlink(kconsumerd_err_unix_sock_path); | |
725 | unlink(kconsumerd_cmd_unix_sock_path); | |
726 | ||
727 | kconsumerd_pid = 0; | |
1d4b027a DG |
728 | return NULL; |
729 | } | |
730 | ||
731 | /* | |
1d4b027a DG |
732 | * This thread manage the application socket communication |
733 | */ | |
734 | static void *thread_manage_apps(void *data) | |
735 | { | |
273ea72c DG |
736 | int sock = 0, ret; |
737 | struct pollfd pollfd[2]; | |
1d4b027a DG |
738 | |
739 | /* TODO: Something more elegant is needed but fine for now */ | |
740 | /* FIXME: change all types to either uint8_t, uint32_t, uint64_t | |
741 | * for 32-bit vs 64-bit compat processes. */ | |
742 | /* replicate in ust with version number */ | |
743 | struct { | |
744 | int reg; /* 1:register, 0:unregister */ | |
745 | pid_t pid; | |
746 | uid_t uid; | |
747 | } reg_msg; | |
748 | ||
749 | DBG("[thread] Manage apps started"); | |
750 | ||
751 | ret = lttcomm_listen_unix_sock(apps_sock); | |
752 | if (ret < 0) { | |
753 | goto error; | |
754 | } | |
755 | ||
273ea72c DG |
756 | /* First fd is always the quit pipe */ |
757 | pollfd[0].fd = thread_quit_pipe[0]; | |
758 | ||
759 | /* Apps socket */ | |
760 | pollfd[1].fd = apps_sock; | |
761 | pollfd[1].events = POLLIN; | |
762 | ||
1d4b027a DG |
763 | /* Notify all applications to register */ |
764 | notify_apps(default_global_apps_pipe); | |
765 | ||
766 | while (1) { | |
767 | DBG("Accepting application registration"); | |
273ea72c DG |
768 | |
769 | /* Inifinite blocking call, waiting for transmission */ | |
770 | ret = poll(pollfd, 2, -1); | |
771 | if (ret < 0) { | |
772 | perror("poll apps thread"); | |
773 | goto error; | |
774 | } | |
775 | ||
776 | /* Thread quit pipe has been closed. Killing thread. */ | |
777 | if (pollfd[0].revents == POLLNVAL) { | |
778 | goto error; | |
779 | } else if (pollfd[1].revents == POLLERR) { | |
780 | ERR("Apps socket poll error"); | |
781 | goto error; | |
782 | } | |
783 | ||
1d4b027a DG |
784 | sock = lttcomm_accept_unix_sock(apps_sock); |
785 | if (sock < 0) { | |
786 | goto error; | |
787 | } | |
788 | ||
273ea72c DG |
789 | /* |
790 | * Basic recv here to handle the very simple data | |
1d4b027a DG |
791 | * that the libust send to register (reg_msg). |
792 | */ | |
793 | ret = recv(sock, ®_msg, sizeof(reg_msg), 0); | |
794 | if (ret < 0) { | |
795 | perror("recv"); | |
796 | continue; | |
797 | } | |
798 | ||
799 | /* Add application to the global traceable list */ | |
800 | if (reg_msg.reg == 1) { | |
801 | /* Registering */ | |
802 | ret = register_traceable_app(reg_msg.pid, reg_msg.uid); | |
803 | if (ret < 0) { | |
804 | /* register_traceable_app only return an error with | |
805 | * ENOMEM. At this point, we better stop everything. | |
806 | */ | |
807 | goto error; | |
808 | } | |
809 | } else { | |
810 | /* Unregistering */ | |
811 | unregister_traceable_app(reg_msg.pid); | |
812 | } | |
813 | } | |
814 | ||
815 | error: | |
273ea72c DG |
816 | DBG("Apps thread dying"); |
817 | if (apps_sock) { | |
818 | close(apps_sock); | |
819 | } | |
820 | if (sock) { | |
821 | close(sock); | |
822 | } | |
1d4b027a | 823 | |
273ea72c | 824 | unlink(apps_unix_sock_path); |
1d4b027a DG |
825 | return NULL; |
826 | } | |
827 | ||
8c0faa1d | 828 | /* |
d063d709 DG |
829 | * Start the thread_manage_kconsumerd. This must be done after a kconsumerd |
830 | * exec or it will fails. | |
8c0faa1d | 831 | */ |
693bd40b | 832 | static int spawn_kconsumerd_thread(void) |
8c0faa1d DG |
833 | { |
834 | int ret; | |
835 | ||
836 | /* Setup semaphore */ | |
837 | sem_init(&kconsumerd_sem, 0, 0); | |
838 | ||
1d4b027a | 839 | ret = pthread_create(&kconsumerd_thread, NULL, thread_manage_kconsumerd, (void *) NULL); |
8c0faa1d DG |
840 | if (ret != 0) { |
841 | perror("pthread_create kconsumerd"); | |
842 | goto error; | |
843 | } | |
844 | ||
693bd40b | 845 | /* Wait for the kconsumerd thread to be ready */ |
8c0faa1d DG |
846 | sem_wait(&kconsumerd_sem); |
847 | ||
712ea556 DG |
848 | if (kconsumerd_pid == 0) { |
849 | ERR("Kconsumerd did not start"); | |
850 | goto error; | |
851 | } | |
852 | ||
8c0faa1d DG |
853 | return 0; |
854 | ||
855 | error: | |
712ea556 | 856 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
8c0faa1d DG |
857 | return ret; |
858 | } | |
859 | ||
860 | /* | |
d063d709 | 861 | * Fork and exec a kernel consumer daemon (kconsumerd). |
8c0faa1d | 862 | * |
d063d709 | 863 | * Return pid if successful else -1. |
8c0faa1d | 864 | */ |
693bd40b | 865 | static pid_t spawn_kconsumerd(void) |
8c0faa1d DG |
866 | { |
867 | int ret; | |
868 | pid_t pid; | |
53086306 | 869 | const char *verbosity; |
8c0faa1d | 870 | |
c49dc785 DG |
871 | DBG("Spawning kconsumerd"); |
872 | ||
8c0faa1d DG |
873 | pid = fork(); |
874 | if (pid == 0) { | |
875 | /* | |
876 | * Exec kconsumerd. | |
877 | */ | |
53086306 DG |
878 | if (opt_verbose > 1) { |
879 | verbosity = "--verbose"; | |
880 | } else { | |
881 | verbosity = "--quiet"; | |
882 | } | |
883 | execl(INSTALL_BIN_PATH "/ltt-kconsumerd", "ltt-kconsumerd", verbosity, NULL); | |
8c0faa1d DG |
884 | if (errno != 0) { |
885 | perror("kernel start consumer exec"); | |
886 | } | |
887 | exit(EXIT_FAILURE); | |
888 | } else if (pid > 0) { | |
889 | ret = pid; | |
890 | goto error; | |
891 | } else { | |
892 | perror("kernel start consumer fork"); | |
893 | ret = -errno; | |
894 | goto error; | |
895 | } | |
896 | ||
897 | error: | |
898 | return ret; | |
899 | } | |
900 | ||
693bd40b | 901 | /* |
d063d709 | 902 | * Spawn the kconsumerd daemon and session daemon thread. |
693bd40b DG |
903 | */ |
904 | static int start_kconsumerd(void) | |
905 | { | |
906 | int ret; | |
907 | ||
693bd40b | 908 | pthread_mutex_lock(&kconsumerd_pid_mutex); |
c49dc785 | 909 | if (kconsumerd_pid != 0) { |
817153bb | 910 | pthread_mutex_unlock(&kconsumerd_pid_mutex); |
c49dc785 DG |
911 | goto end; |
912 | } | |
693bd40b | 913 | |
c49dc785 DG |
914 | ret = spawn_kconsumerd(); |
915 | if (ret < 0) { | |
916 | ERR("Spawning kconsumerd failed"); | |
917 | ret = LTTCOMM_KERN_CONSUMER_FAIL; | |
918 | pthread_mutex_unlock(&kconsumerd_pid_mutex); | |
919 | goto error; | |
693bd40b | 920 | } |
c49dc785 DG |
921 | |
922 | /* Setting up the global kconsumerd_pid */ | |
923 | kconsumerd_pid = ret; | |
693bd40b DG |
924 | pthread_mutex_unlock(&kconsumerd_pid_mutex); |
925 | ||
6f61d021 DG |
926 | DBG("Kconsumerd pid %d", ret); |
927 | ||
693bd40b | 928 | DBG("Spawning kconsumerd thread"); |
693bd40b DG |
929 | ret = spawn_kconsumerd_thread(); |
930 | if (ret < 0) { | |
931 | ERR("Fatal error spawning kconsumerd thread"); | |
693bd40b DG |
932 | goto error; |
933 | } | |
934 | ||
c49dc785 | 935 | end: |
693bd40b DG |
936 | return 0; |
937 | ||
938 | error: | |
939 | return ret; | |
940 | } | |
941 | ||
b73401da | 942 | /* |
d063d709 | 943 | * modprobe_kernel_modules |
b73401da DG |
944 | */ |
945 | static int modprobe_kernel_modules(void) | |
946 | { | |
947 | int ret = 0, i = 0; | |
948 | char modprobe[256]; | |
949 | ||
950 | while (kernel_modules_list[i] != NULL) { | |
951 | ret = snprintf(modprobe, sizeof(modprobe), "/sbin/modprobe %s", | |
952 | kernel_modules_list[i]); | |
953 | if (ret < 0) { | |
954 | perror("snprintf modprobe"); | |
955 | goto error; | |
956 | } | |
957 | ret = system(modprobe); | |
958 | if (ret < 0) { | |
959 | ERR("Unable to load module %s", kernel_modules_list[i]); | |
960 | } | |
961 | DBG("Modprobe successfully %s", kernel_modules_list[i]); | |
962 | i++; | |
963 | } | |
964 | ||
965 | error: | |
966 | return ret; | |
967 | } | |
968 | ||
969 | /* | |
d063d709 | 970 | * mount_debugfs |
b73401da DG |
971 | */ |
972 | static int mount_debugfs(char *path) | |
973 | { | |
974 | int ret; | |
975 | char *type = "debugfs"; | |
976 | ||
977 | ret = mkdir_recursive(path, S_IRWXU | S_IRWXG); | |
978 | if (ret < 0) { | |
979 | goto error; | |
980 | } | |
981 | ||
982 | ret = mount(type, path, type, 0, NULL); | |
983 | if (ret < 0) { | |
984 | perror("mount debugfs"); | |
985 | goto error; | |
986 | } | |
987 | ||
988 | DBG("Mounted debugfs successfully at %s", path); | |
989 | ||
990 | error: | |
991 | return ret; | |
992 | } | |
993 | ||
8c0faa1d | 994 | /* |
d063d709 | 995 | * Setup necessary data for kernel tracer action. |
8c0faa1d | 996 | */ |
f3ed775e | 997 | static void init_kernel_tracer(void) |
8c0faa1d | 998 | { |
b73401da DG |
999 | int ret; |
1000 | char *proc_mounts = "/proc/mounts"; | |
1001 | char line[256]; | |
1002 | char *debugfs_path = NULL, *lttng_path; | |
1003 | FILE *fp; | |
1004 | ||
1005 | /* Detect debugfs */ | |
1006 | fp = fopen(proc_mounts, "r"); | |
1007 | if (fp == NULL) { | |
1008 | ERR("Unable to probe %s", proc_mounts); | |
1009 | goto error; | |
1010 | } | |
1011 | ||
1012 | while (fgets(line, sizeof(line), fp) != NULL) { | |
1013 | if (strstr(line, "debugfs") != NULL) { | |
1014 | /* Remove first string */ | |
1015 | strtok(line, " "); | |
1016 | /* Dup string here so we can reuse line later on */ | |
1017 | debugfs_path = strdup(strtok(NULL, " ")); | |
1018 | DBG("Got debugfs path : %s", debugfs_path); | |
1019 | break; | |
1020 | } | |
1021 | } | |
1022 | ||
1023 | fclose(fp); | |
1024 | ||
1025 | /* Mount debugfs if needded */ | |
1026 | if (debugfs_path == NULL) { | |
1027 | ret = asprintf(&debugfs_path, "/mnt/debugfs"); | |
1028 | if (ret < 0) { | |
1029 | perror("asprintf debugfs path"); | |
1030 | goto error; | |
1031 | } | |
1032 | ret = mount_debugfs(debugfs_path); | |
1033 | if (ret < 0) { | |
1034 | goto error; | |
1035 | } | |
1036 | } | |
1037 | ||
1038 | /* Modprobe lttng kernel modules */ | |
1039 | ret = modprobe_kernel_modules(); | |
1040 | if (ret < 0) { | |
1041 | goto error; | |
1042 | } | |
1043 | ||
1044 | /* Setup lttng kernel path */ | |
1045 | ret = asprintf(<tng_path, "%s/lttng", debugfs_path); | |
1046 | if (ret < 0) { | |
1047 | perror("asprintf lttng path"); | |
1048 | goto error; | |
1049 | } | |
1050 | ||
1051 | /* Open debugfs lttng */ | |
1052 | kernel_tracer_fd = open(lttng_path, O_RDWR); | |
f3ed775e | 1053 | if (kernel_tracer_fd < 0) { |
b73401da DG |
1054 | DBG("Failed to open %s", lttng_path); |
1055 | goto error; | |
8c0faa1d DG |
1056 | } |
1057 | ||
b73401da DG |
1058 | free(lttng_path); |
1059 | free(debugfs_path); | |
f3ed775e | 1060 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
b73401da DG |
1061 | return; |
1062 | ||
1063 | error: | |
1064 | if (lttng_path) { | |
1065 | free(lttng_path); | |
1066 | } | |
1067 | if (debugfs_path) { | |
1068 | free(debugfs_path); | |
1069 | } | |
1070 | WARN("No kernel tracer available"); | |
1071 | kernel_tracer_fd = 0; | |
1072 | return; | |
f3ed775e | 1073 | } |
33a2b854 | 1074 | |
f3ed775e | 1075 | /* |
d063d709 DG |
1076 | * Start tracing by creating trace directory and sending FDs to the kernel |
1077 | * consumer. | |
f3ed775e DG |
1078 | */ |
1079 | static int start_kernel_trace(struct ltt_kernel_session *session) | |
1080 | { | |
f40799e8 | 1081 | int ret = 0; |
8c0faa1d | 1082 | |
f3ed775e DG |
1083 | if (session->kconsumer_fds_sent == 0) { |
1084 | ret = send_kconsumerd_fds(kconsumerd_cmd_sock, session); | |
1085 | if (ret < 0) { | |
1086 | ERR("Send kconsumerd fds failed"); | |
1087 | ret = LTTCOMM_KERN_CONSUMER_FAIL; | |
1088 | goto error; | |
1089 | } | |
1d4b027a | 1090 | |
f3ed775e DG |
1091 | session->kconsumer_fds_sent = 1; |
1092 | } | |
1d4b027a DG |
1093 | |
1094 | error: | |
1095 | return ret; | |
8c0faa1d DG |
1096 | } |
1097 | ||
7a485870 DG |
1098 | /* |
1099 | * Notify kernel thread to update it's pollfd. | |
1100 | */ | |
1101 | static int notify_kernel_pollfd(void) | |
1102 | { | |
1103 | int ret; | |
1104 | ||
1105 | /* Inform kernel thread of the new kernel channel */ | |
1106 | ret = write(kernel_poll_pipe[1], "!", 1); | |
1107 | if (ret < 0) { | |
1108 | perror("write kernel poll pipe"); | |
1109 | } | |
1110 | ||
1111 | return ret; | |
1112 | } | |
1113 | ||
8c0faa1d | 1114 | /* |
d063d709 | 1115 | * Allocate a channel structure and fill it. |
8c0faa1d | 1116 | */ |
ed8f384d | 1117 | static struct lttng_channel *init_default_channel(char *name) |
8c0faa1d | 1118 | { |
f3ed775e | 1119 | struct lttng_channel *chan; |
1d4b027a | 1120 | |
f3ed775e DG |
1121 | chan = malloc(sizeof(struct lttng_channel)); |
1122 | if (chan == NULL) { | |
1123 | perror("init channel malloc"); | |
1124 | goto error; | |
8c0faa1d | 1125 | } |
1d4b027a | 1126 | |
ed8f384d | 1127 | if (snprintf(chan->name, NAME_MAX, "%s", name) < 0) { |
9f19cc17 | 1128 | perror("snprintf channel name"); |
f3ed775e DG |
1129 | return NULL; |
1130 | } | |
1131 | ||
1132 | chan->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
1133 | chan->attr.subbuf_size = DEFAULT_CHANNEL_SUBBUF_SIZE; | |
1134 | chan->attr.num_subbuf = DEFAULT_CHANNEL_SUBBUF_NUM; | |
1135 | chan->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER; | |
1136 | chan->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER; | |
7d452e12 | 1137 | chan->attr.output = DEFAULT_KERNEL_CHANNEL_OUTPUT; |
1d4b027a DG |
1138 | |
1139 | error: | |
f3ed775e | 1140 | return chan; |
8c0faa1d DG |
1141 | } |
1142 | ||
333f285e | 1143 | /* |
d063d709 | 1144 | * Create a kernel tracer session then create the default channel. |
333f285e | 1145 | */ |
f3ed775e | 1146 | static int create_kernel_session(struct ltt_session *session) |
333f285e | 1147 | { |
f3ed775e | 1148 | int ret; |
f3ed775e DG |
1149 | |
1150 | DBG("Creating kernel session"); | |
1151 | ||
1152 | ret = kernel_create_session(session, kernel_tracer_fd); | |
1153 | if (ret < 0) { | |
1154 | ret = LTTCOMM_KERN_SESS_FAIL; | |
1155 | goto error; | |
333f285e DG |
1156 | } |
1157 | ||
7a485870 DG |
1158 | ret = mkdir_recursive(session->path, S_IRWXU | S_IRWXG ); |
1159 | if (ret < 0) { | |
1160 | if (ret != EEXIST) { | |
1161 | ERR("Trace directory creation error"); | |
1162 | goto error; | |
1163 | } | |
1164 | } | |
1165 | ||
f3ed775e DG |
1166 | error: |
1167 | return ret; | |
333f285e DG |
1168 | } |
1169 | ||
6c9cc2ab DG |
1170 | /* |
1171 | * Using the session list, filled a lttng_session array to send back to the | |
1172 | * client for session listing. | |
1173 | * | |
1174 | * The session list lock MUST be acquired before calling this function. Use | |
1175 | * lock_session_list() and unlock_session_list(). | |
1176 | */ | |
1177 | static void list_lttng_sessions(struct lttng_session *sessions) | |
1178 | { | |
1179 | int i = 0; | |
1180 | struct ltt_session *session; | |
1181 | ||
1182 | DBG("Getting all available session"); | |
1183 | /* | |
1184 | * Iterate over session list and append data after the control struct in | |
1185 | * the buffer. | |
1186 | */ | |
1187 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
1188 | strncpy(sessions[i].path, session->path, PATH_MAX); | |
1189 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
1190 | i++; | |
1191 | } | |
1192 | } | |
1193 | ||
9f19cc17 DG |
1194 | /* |
1195 | * Fill lttng_channel array of all channels. | |
1196 | */ | |
1197 | static void list_lttng_channels(struct ltt_session *session, | |
1198 | struct lttng_channel *channels) | |
1199 | { | |
1200 | int i = 0; | |
1201 | struct ltt_kernel_channel *kchan; | |
1202 | ||
1203 | DBG("Listing channels for session %s", session->name); | |
1204 | ||
1205 | /* Kernel channels */ | |
1206 | if (session->kernel_session != NULL) { | |
1207 | cds_list_for_each_entry(kchan, &session->kernel_session->channel_list.head, list) { | |
1208 | /* Copy lttng_channel struct to array */ | |
1209 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
1210 | channels[i].enabled = kchan->enabled; | |
1211 | i++; | |
1212 | } | |
1213 | } | |
1214 | ||
1215 | /* TODO: Missing UST listing */ | |
1216 | } | |
1217 | ||
1218 | /* | |
1219 | * Fill lttng_event array of all events in the channel. | |
1220 | */ | |
1221 | static void list_lttng_events(struct ltt_kernel_channel *kchan, | |
1222 | struct lttng_event *events) | |
1223 | { | |
1224 | /* | |
1225 | * TODO: This is ONLY kernel. Need UST support. | |
1226 | */ | |
1227 | int i = 0; | |
1228 | struct ltt_kernel_event *event; | |
1229 | ||
1230 | DBG("Listing events for channel %s", kchan->channel->name); | |
1231 | ||
1232 | /* Kernel channels */ | |
1233 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
1234 | strncpy(events[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
1235 | events[i].enabled = event->enabled; | |
1236 | switch (event->event->instrumentation) { | |
1237 | case LTTNG_KERNEL_TRACEPOINT: | |
1238 | events[i].type = LTTNG_EVENT_TRACEPOINT; | |
1239 | break; | |
1240 | case LTTNG_KERNEL_KPROBE: | |
1241 | case LTTNG_KERNEL_KRETPROBE: | |
1242 | events[i].type = LTTNG_EVENT_PROBE; | |
1243 | memcpy(&events[i].attr.probe, &event->event->u.kprobe, | |
1244 | sizeof(struct lttng_kernel_kprobe)); | |
1245 | break; | |
1246 | case LTTNG_KERNEL_FUNCTION: | |
1247 | events[i].type = LTTNG_EVENT_FUNCTION; | |
1248 | memcpy(&events[i].attr.ftrace, &event->event->u.ftrace, | |
1249 | sizeof(struct lttng_kernel_function)); | |
1250 | break; | |
1251 | } | |
1252 | i++; | |
1253 | } | |
1254 | } | |
1255 | ||
fac6795d | 1256 | /* |
d063d709 DG |
1257 | * Process the command requested by the lttng client within the command |
1258 | * context structure. This function make sure that the return structure (llm) | |
1259 | * is set and ready for transmission before returning. | |
fac6795d | 1260 | * |
e065084a | 1261 | * Return any error encountered or 0 for success. |
fac6795d | 1262 | */ |
5461b305 | 1263 | static int process_client_msg(struct command_ctx *cmd_ctx) |
fac6795d | 1264 | { |
f40799e8 | 1265 | int ret = LTTCOMM_OK; |
fac6795d | 1266 | |
5461b305 | 1267 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); |
fac6795d | 1268 | |
f3ed775e | 1269 | /* Listing commands don't need a session */ |
5461b305 | 1270 | switch (cmd_ctx->lsm->cmd_type) { |
5e16da05 MD |
1271 | case LTTNG_CREATE_SESSION: |
1272 | case LTTNG_LIST_SESSIONS: | |
052da939 | 1273 | case LTTNG_LIST_TRACEPOINTS: |
5e16da05 MD |
1274 | break; |
1275 | default: | |
f3ed775e DG |
1276 | DBG("Getting session %s by name", cmd_ctx->lsm->session_name); |
1277 | cmd_ctx->session = find_session_by_name(cmd_ctx->lsm->session_name); | |
5461b305 | 1278 | if (cmd_ctx->session == NULL) { |
f3ed775e DG |
1279 | /* If session name not found */ |
1280 | if (cmd_ctx->lsm->session_name != NULL) { | |
1281 | ret = LTTCOMM_SESS_NOT_FOUND; | |
1282 | } else { /* If no session name specified */ | |
1283 | ret = LTTCOMM_SELECT_SESS; | |
1284 | } | |
5461b305 | 1285 | goto error; |
b5541356 DG |
1286 | } else { |
1287 | /* Acquire lock for the session */ | |
1288 | lock_session(cmd_ctx->session); | |
379473d2 | 1289 | } |
5e16da05 | 1290 | break; |
379473d2 DG |
1291 | } |
1292 | ||
f3ed775e DG |
1293 | /* |
1294 | * Check kernel command for kernel session. | |
1295 | */ | |
20fe2104 | 1296 | switch (cmd_ctx->lsm->cmd_type) { |
b579acd9 | 1297 | case LTTNG_ADD_CONTEXT: |
f3ed775e DG |
1298 | case LTTNG_KERNEL_DISABLE_ALL_EVENT: |
1299 | case LTTNG_KERNEL_DISABLE_CHANNEL: | |
1300 | case LTTNG_KERNEL_DISABLE_EVENT: | |
1301 | case LTTNG_KERNEL_ENABLE_ALL_EVENT: | |
1302 | case LTTNG_KERNEL_ENABLE_CHANNEL: | |
1303 | case LTTNG_KERNEL_ENABLE_EVENT: | |
052da939 | 1304 | case LTTNG_LIST_TRACEPOINTS: |
333f285e | 1305 | /* Kernel tracer check */ |
20fe2104 | 1306 | if (kernel_tracer_fd == 0) { |
333f285e DG |
1307 | init_kernel_tracer(); |
1308 | if (kernel_tracer_fd == 0) { | |
1309 | ret = LTTCOMM_KERN_NA; | |
1310 | goto error; | |
1311 | } | |
20fe2104 | 1312 | } |
f3ed775e DG |
1313 | |
1314 | /* Need a session for kernel command */ | |
052da939 | 1315 | if (cmd_ctx->lsm->cmd_type != LTTNG_LIST_TRACEPOINTS && |
f3ed775e | 1316 | cmd_ctx->session->kernel_session == NULL) { |
7b395890 | 1317 | |
f3ed775e DG |
1318 | ret = create_kernel_session(cmd_ctx->session); |
1319 | if (ret < 0) { | |
1320 | ret = LTTCOMM_KERN_SESS_FAIL; | |
1321 | goto error; | |
1322 | } | |
1323 | ||
7b395890 | 1324 | /* Start the kernel consumer daemon */ |
f3ed775e DG |
1325 | if (kconsumerd_pid == 0) { |
1326 | ret = start_kconsumerd(); | |
1327 | if (ret < 0) { | |
1328 | goto error; | |
1329 | } | |
1330 | } | |
1331 | } | |
20fe2104 DG |
1332 | } |
1333 | ||
97b1a726 | 1334 | #ifdef DISABLED |
471d1693 | 1335 | /* Connect to ust apps if available pid */ |
5461b305 | 1336 | if (cmd_ctx->lsm->pid > 0) { |
471d1693 | 1337 | /* Connect to app using ustctl API */ |
5461b305 DG |
1338 | cmd_ctx->ust_sock = ust_connect_app(cmd_ctx->lsm->pid); |
1339 | if (cmd_ctx->ust_sock < 0) { | |
471d1693 | 1340 | ret = LTTCOMM_NO_TRACEABLE; |
5461b305 | 1341 | goto error; |
471d1693 DG |
1342 | } |
1343 | } | |
97b1a726 | 1344 | #endif /* DISABLED */ |
471d1693 | 1345 | |
fac6795d | 1346 | /* Process by command type */ |
5461b305 | 1347 | switch (cmd_ctx->lsm->cmd_type) { |
b579acd9 | 1348 | case LTTNG_ADD_CONTEXT: |
d65106b1 | 1349 | { |
b579acd9 | 1350 | struct lttng_kernel_context kctx; |
d65106b1 DG |
1351 | |
1352 | /* Setup lttng message with no payload */ | |
1353 | ret = setup_lttng_msg(cmd_ctx, 0); | |
1354 | if (ret < 0) { | |
1355 | goto setup_error; | |
1356 | } | |
1357 | ||
b579acd9 DG |
1358 | switch (cmd_ctx->lsm->domain.type) { |
1359 | case LTTNG_DOMAIN_KERNEL: | |
1360 | /* Create Kernel context */ | |
1361 | kctx.ctx = cmd_ctx->lsm->u.context.ctx.ctx; | |
1362 | kctx.u.perf_counter.type = cmd_ctx->lsm->u.context.ctx.u.perf_counter.type; | |
1363 | kctx.u.perf_counter.config = cmd_ctx->lsm->u.context.ctx.u.perf_counter.config; | |
1364 | strncpy(kctx.u.perf_counter.name, | |
1365 | cmd_ctx->lsm->u.context.ctx.u.perf_counter.name, | |
1366 | LTTNG_SYMBOL_NAME_LEN); | |
1367 | ||
1368 | /* Add kernel context to kernel tracer. See context.c */ | |
1369 | ret = add_kernel_context(cmd_ctx->session->kernel_session, &kctx, | |
1370 | cmd_ctx->lsm->u.context.event_name, | |
1371 | cmd_ctx->lsm->u.context.channel_name); | |
1372 | if (ret != LTTCOMM_OK) { | |
d65106b1 DG |
1373 | goto error; |
1374 | } | |
b579acd9 DG |
1375 | break; |
1376 | default: | |
1377 | /* TODO: Userspace tracing */ | |
1378 | ret = LTTCOMM_NOT_IMPLEMENTED; | |
d65106b1 DG |
1379 | } |
1380 | ||
1381 | ret = LTTCOMM_OK; | |
1382 | break; | |
1383 | } | |
26cc6b4e DG |
1384 | case LTTNG_KERNEL_DISABLE_CHANNEL: |
1385 | { | |
1386 | struct ltt_kernel_channel *chan; | |
1387 | ||
1388 | /* Setup lttng message with no payload */ | |
1389 | ret = setup_lttng_msg(cmd_ctx, 0); | |
1390 | if (ret < 0) { | |
1391 | goto setup_error; | |
1392 | } | |
1393 | ||
1394 | chan = get_kernel_channel_by_name(cmd_ctx->lsm->u.disable.channel_name, | |
1395 | cmd_ctx->session->kernel_session); | |
1396 | if (chan == NULL) { | |
1397 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
1398 | goto error; | |
1399 | } else if (chan->enabled == 1) { | |
1400 | ret = kernel_disable_channel(chan); | |
1401 | if (ret < 0) { | |
1402 | if (ret != EEXIST) { | |
1403 | ret = LTTCOMM_KERN_CHAN_DISABLE_FAIL; | |
1404 | } | |
1405 | goto error; | |
1406 | } | |
1407 | } | |
1408 | ||
1409 | kernel_wait_quiescent(kernel_tracer_fd); | |
1410 | ret = LTTCOMM_OK; | |
1411 | break; | |
1412 | } | |
e953ef25 DG |
1413 | case LTTNG_KERNEL_DISABLE_EVENT: |
1414 | { | |
e953ef25 | 1415 | struct ltt_kernel_channel *chan; |
19e70852 | 1416 | struct ltt_kernel_event *ev; |
e953ef25 DG |
1417 | |
1418 | /* Setup lttng message with no payload */ | |
1419 | ret = setup_lttng_msg(cmd_ctx, 0); | |
1420 | if (ret < 0) { | |
1421 | goto setup_error; | |
1422 | } | |
1423 | ||
19e70852 DG |
1424 | chan = get_kernel_channel_by_name(cmd_ctx->lsm->u.disable.channel_name, |
1425 | cmd_ctx->session->kernel_session); | |
1426 | if (chan == NULL) { | |
1427 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
1428 | goto error; | |
1429 | } | |
e953ef25 | 1430 | |
19e70852 DG |
1431 | ev = get_kernel_event_by_name(cmd_ctx->lsm->u.disable.name, chan); |
1432 | if (ev != NULL) { | |
1433 | DBG("Disabling kernel event %s for channel %s.", | |
1434 | cmd_ctx->lsm->u.disable.name, cmd_ctx->lsm->u.disable.channel_name); | |
1435 | ret = kernel_disable_event(ev); | |
1436 | if (ret < 0) { | |
1437 | ret = LTTCOMM_KERN_ENABLE_FAIL; | |
1438 | goto error; | |
e953ef25 DG |
1439 | } |
1440 | } | |
1441 | ||
19e70852 DG |
1442 | kernel_wait_quiescent(kernel_tracer_fd); |
1443 | ret = LTTCOMM_OK; | |
e953ef25 DG |
1444 | break; |
1445 | } | |
950131af DG |
1446 | case LTTNG_KERNEL_DISABLE_ALL_EVENT: |
1447 | { | |
1448 | struct ltt_kernel_channel *chan; | |
1449 | struct ltt_kernel_event *ev; | |
1450 | ||
1451 | /* Setup lttng message with no payload */ | |
1452 | ret = setup_lttng_msg(cmd_ctx, 0); | |
1453 | if (ret < 0) { | |
1454 | goto setup_error; | |
1455 | } | |
1456 | ||
1457 | DBG("Disabling all enabled kernel events"); | |
1458 | ||
1459 | chan = get_kernel_channel_by_name(cmd_ctx->lsm->u.disable.channel_name, | |
1460 | cmd_ctx->session->kernel_session); | |
1461 | if (chan == NULL) { | |
1462 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
1463 | goto error; | |
1464 | } | |
1465 | ||
1466 | /* For each event in the kernel session */ | |
1467 | cds_list_for_each_entry(ev, &chan->events_list.head, list) { | |
1468 | DBG("Disabling kernel event %s for channel %s.", | |
1469 | ev->event->name, cmd_ctx->lsm->u.disable.channel_name); | |
1470 | ret = kernel_disable_event(ev); | |
1471 | if (ret < 0) { | |
1472 | continue; | |
1473 | } | |
1474 | } | |
1475 | ||
1476 | /* Quiescent wait after event disable */ | |
1477 | kernel_wait_quiescent(kernel_tracer_fd); | |
1478 | ret = LTTCOMM_OK; | |
1479 | break; | |
1480 | } | |
d36b8583 DG |
1481 | case LTTNG_KERNEL_ENABLE_CHANNEL: |
1482 | { | |
1483 | struct ltt_kernel_channel *chan; | |
1484 | ||
1485 | /* Setup lttng message with no payload */ | |
1486 | ret = setup_lttng_msg(cmd_ctx, 0); | |
1487 | if (ret < 0) { | |
1488 | goto setup_error; | |
1489 | } | |
1490 | ||
1491 | chan = get_kernel_channel_by_name(cmd_ctx->lsm->u.enable.channel_name, | |
1492 | cmd_ctx->session->kernel_session); | |
1493 | if (chan == NULL) { | |
7d29a247 DG |
1494 | /* Channel not found, creating it */ |
1495 | DBG("Creating kernel channel"); | |
1496 | ||
1497 | ret = kernel_create_channel(cmd_ctx->session->kernel_session, | |
1498 | &cmd_ctx->lsm->u.channel.chan, cmd_ctx->session->path); | |
1499 | if (ret < 0) { | |
1500 | ret = LTTCOMM_KERN_CHAN_FAIL; | |
1501 | goto error; | |
1502 | } | |
1503 | ||
1504 | /* Notify kernel thread that there is a new channel */ | |
1505 | ret = notify_kernel_pollfd(); | |
1506 | if (ret < 0) { | |
1507 | ret = LTTCOMM_FATAL; | |
1508 | goto error; | |
1509 | } | |
d36b8583 DG |
1510 | } else if (chan->enabled == 0) { |
1511 | ret = kernel_enable_channel(chan); | |
1512 | if (ret < 0) { | |
1513 | if (ret != EEXIST) { | |
1514 | ret = LTTCOMM_KERN_CHAN_ENABLE_FAIL; | |
1515 | } | |
1516 | goto error; | |
1517 | } | |
1518 | } | |
1519 | ||
1520 | kernel_wait_quiescent(kernel_tracer_fd); | |
1521 | ret = LTTCOMM_OK; | |
1522 | break; | |
1523 | } | |
f3ed775e | 1524 | case LTTNG_KERNEL_ENABLE_EVENT: |
894be886 | 1525 | { |
7d29a247 DG |
1526 | char *channel_name; |
1527 | struct ltt_kernel_channel *kchan; | |
19e70852 | 1528 | struct ltt_kernel_event *ev; |
7d29a247 | 1529 | struct lttng_channel *chan; |
f3ed775e | 1530 | |
894be886 DG |
1531 | /* Setup lttng message with no payload */ |
1532 | ret = setup_lttng_msg(cmd_ctx, 0); | |
1533 | if (ret < 0) { | |
1534 | goto setup_error; | |
1535 | } | |
1536 | ||
7d29a247 DG |
1537 | channel_name = cmd_ctx->lsm->u.enable.channel_name; |
1538 | ||
1539 | do { | |
1540 | kchan = get_kernel_channel_by_name(channel_name, | |
1541 | cmd_ctx->session->kernel_session); | |
1542 | if (kchan == NULL) { | |
ed8f384d | 1543 | DBG("Channel not found. Creating channel %s", channel_name); |
7d29a247 | 1544 | |
ed8f384d | 1545 | chan = init_default_channel(channel_name); |
7d29a247 DG |
1546 | if (chan == NULL) { |
1547 | ret = LTTCOMM_FATAL; | |
1548 | goto error; | |
1549 | } | |
1550 | ||
1551 | ret = kernel_create_channel(cmd_ctx->session->kernel_session, | |
1552 | chan, cmd_ctx->session->path); | |
1553 | if (ret < 0) { | |
1554 | ret = LTTCOMM_KERN_CHAN_FAIL; | |
1555 | goto error; | |
1556 | } | |
1557 | } | |
1558 | } while (kchan == NULL); | |
f34daff7 | 1559 | |
7d29a247 | 1560 | ev = get_kernel_event_by_name(cmd_ctx->lsm->u.enable.event.name, kchan); |
19e70852 DG |
1561 | if (ev == NULL) { |
1562 | DBG("Creating kernel event %s for channel %s.", | |
7d29a247 DG |
1563 | cmd_ctx->lsm->u.enable.event.name, channel_name); |
1564 | ret = kernel_create_event(&cmd_ctx->lsm->u.enable.event, kchan); | |
f3ed775e | 1565 | } else { |
19e70852 | 1566 | DBG("Enabling kernel event %s for channel %s.", |
7d29a247 | 1567 | cmd_ctx->lsm->u.enable.event.name, channel_name); |
19e70852 | 1568 | ret = kernel_enable_event(ev); |
7d29a247 DG |
1569 | if (ret == -EEXIST) { |
1570 | ret = LTTCOMM_KERN_EVENT_EXIST; | |
1571 | goto error; | |
1572 | } | |
19e70852 DG |
1573 | } |
1574 | ||
1575 | if (ret < 0) { | |
1576 | ret = LTTCOMM_KERN_ENABLE_FAIL; | |
1577 | goto error; | |
f3ed775e | 1578 | } |
19e70852 DG |
1579 | |
1580 | kernel_wait_quiescent(kernel_tracer_fd); | |
1581 | ret = LTTCOMM_OK; | |
894be886 DG |
1582 | break; |
1583 | } | |
f3ed775e | 1584 | case LTTNG_KERNEL_ENABLE_ALL_EVENT: |
33a2b854 | 1585 | { |
9f19cc17 DG |
1586 | int size, i; |
1587 | char *channel_name; | |
7d29a247 | 1588 | struct ltt_kernel_channel *kchan; |
950131af | 1589 | struct ltt_kernel_event *ev; |
9f19cc17 | 1590 | struct lttng_event *event_list; |
7d29a247 | 1591 | struct lttng_channel *chan; |
33a2b854 DG |
1592 | |
1593 | /* Setup lttng message with no payload */ | |
1594 | ret = setup_lttng_msg(cmd_ctx, 0); | |
1595 | if (ret < 0) { | |
1596 | goto setup_error; | |
1597 | } | |
1598 | ||
1599 | DBG("Enabling all kernel event"); | |
1600 | ||
7d29a247 DG |
1601 | channel_name = cmd_ctx->lsm->u.enable.channel_name; |
1602 | ||
1603 | do { | |
1604 | kchan = get_kernel_channel_by_name(channel_name, | |
1605 | cmd_ctx->session->kernel_session); | |
1606 | if (kchan == NULL) { | |
ed8f384d | 1607 | DBG("Channel not found. Creating channel %s", channel_name); |
7d29a247 | 1608 | |
ed8f384d | 1609 | chan = init_default_channel(channel_name); |
7d29a247 DG |
1610 | if (chan == NULL) { |
1611 | ret = LTTCOMM_FATAL; | |
1612 | goto error; | |
1613 | } | |
1614 | ||
1615 | ret = kernel_create_channel(cmd_ctx->session->kernel_session, | |
0c11f72b | 1616 | chan, cmd_ctx->session->path); |
7d29a247 DG |
1617 | if (ret < 0) { |
1618 | ret = LTTCOMM_KERN_CHAN_FAIL; | |
1619 | goto error; | |
1620 | } | |
1621 | } | |
1622 | } while (kchan == NULL); | |
33a2b854 | 1623 | |
950131af | 1624 | /* For each event in the kernel session */ |
7d29a247 | 1625 | cds_list_for_each_entry(ev, &kchan->events_list.head, list) { |
950131af | 1626 | DBG("Enabling kernel event %s for channel %s.", |
7d29a247 | 1627 | ev->event->name, channel_name); |
950131af DG |
1628 | ret = kernel_enable_event(ev); |
1629 | if (ret < 0) { | |
1630 | continue; | |
f3ed775e DG |
1631 | } |
1632 | } | |
1633 | ||
950131af DG |
1634 | size = kernel_list_events(kernel_tracer_fd, &event_list); |
1635 | if (size < 0) { | |
1636 | ret = LTTCOMM_KERN_LIST_FAIL; | |
f3ed775e DG |
1637 | goto error; |
1638 | } | |
1639 | ||
9f19cc17 DG |
1640 | for (i = 0; i < size; i++) { |
1641 | ev = get_kernel_event_by_name(event_list[i].name, kchan); | |
950131af | 1642 | if (ev == NULL) { |
950131af | 1643 | /* Default event type for enable all */ |
9f19cc17 | 1644 | event_list[i].type = LTTNG_EVENT_TRACEPOINT; |
950131af | 1645 | /* Enable each single tracepoint event */ |
9f19cc17 | 1646 | ret = kernel_create_event(&event_list[i], kchan); |
950131af DG |
1647 | if (ret < 0) { |
1648 | /* Ignore error here and continue */ | |
950131af | 1649 | } |
33a2b854 | 1650 | } |
33a2b854 DG |
1651 | } |
1652 | ||
1653 | free(event_list); | |
1654 | ||
f3ed775e DG |
1655 | /* Quiescent wait after event enable */ |
1656 | kernel_wait_quiescent(kernel_tracer_fd); | |
33a2b854 DG |
1657 | ret = LTTCOMM_OK; |
1658 | break; | |
1659 | } | |
052da939 | 1660 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 1661 | { |
9f19cc17 | 1662 | struct lttng_event *events; |
052da939 DG |
1663 | ssize_t nb_events = 0; |
1664 | ||
1665 | switch (cmd_ctx->lsm->domain.type) { | |
1666 | case LTTNG_DOMAIN_KERNEL: | |
1667 | DBG("Listing kernel events"); | |
1668 | nb_events = kernel_list_events(kernel_tracer_fd, &events); | |
1669 | if (nb_events < 0) { | |
1670 | ret = LTTCOMM_KERN_LIST_FAIL; | |
1671 | goto error; | |
1672 | } | |
1673 | break; | |
1674 | default: | |
1675 | /* TODO: Userspace listing */ | |
1676 | ret = LTTCOMM_NOT_IMPLEMENTED; | |
1677 | break; | |
2ef84c95 DG |
1678 | } |
1679 | ||
1680 | /* | |
1681 | * Setup lttng message with payload size set to the event list size in | |
1682 | * bytes and then copy list into the llm payload. | |
1683 | */ | |
052da939 | 1684 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 1685 | if (ret < 0) { |
052da939 | 1686 | free(events); |
2ef84c95 DG |
1687 | goto setup_error; |
1688 | } | |
1689 | ||
1690 | /* Copy event list into message payload */ | |
9f19cc17 | 1691 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 1692 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 1693 | |
9f19cc17 | 1694 | free(events); |
2ef84c95 DG |
1695 | |
1696 | ret = LTTCOMM_OK; | |
1697 | break; | |
1698 | } | |
f3ed775e | 1699 | case LTTNG_START_TRACE: |
8c0faa1d DG |
1700 | { |
1701 | struct ltt_kernel_channel *chan; | |
f3ed775e | 1702 | |
8c0faa1d DG |
1703 | /* Setup lttng message with no payload */ |
1704 | ret = setup_lttng_msg(cmd_ctx, 0); | |
1705 | if (ret < 0) { | |
1706 | goto setup_error; | |
1707 | } | |
1708 | ||
f3ed775e DG |
1709 | /* Kernel tracing */ |
1710 | if (cmd_ctx->session->kernel_session != NULL) { | |
1711 | if (cmd_ctx->session->kernel_session->metadata == NULL) { | |
1712 | DBG("Open kernel metadata"); | |
58a97671 DG |
1713 | ret = kernel_open_metadata(cmd_ctx->session->kernel_session, |
1714 | cmd_ctx->session->path); | |
f3ed775e DG |
1715 | if (ret < 0) { |
1716 | ret = LTTCOMM_KERN_META_FAIL; | |
1717 | goto error; | |
1718 | } | |
1719 | } | |
8c0faa1d | 1720 | |
f3ed775e DG |
1721 | if (cmd_ctx->session->kernel_session->metadata_stream_fd == 0) { |
1722 | DBG("Opening kernel metadata stream"); | |
1723 | if (cmd_ctx->session->kernel_session->metadata_stream_fd == 0) { | |
1724 | ret = kernel_open_metadata_stream(cmd_ctx->session->kernel_session); | |
1725 | if (ret < 0) { | |
1726 | ERR("Kernel create metadata stream failed"); | |
1727 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
1728 | goto error; | |
1729 | } | |
1730 | } | |
1731 | } | |
8c0faa1d | 1732 | |
f3ed775e DG |
1733 | /* For each channel */ |
1734 | cds_list_for_each_entry(chan, &cmd_ctx->session->kernel_session->channel_list.head, list) { | |
1735 | if (chan->stream_count == 0) { | |
1736 | ret = kernel_open_channel_stream(chan); | |
1737 | if (ret < 0) { | |
1738 | ERR("Kernel create channel stream failed"); | |
1739 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
1740 | goto error; | |
1741 | } | |
1742 | /* Update the stream global counter */ | |
1743 | cmd_ctx->session->kernel_session->stream_count_global += ret; | |
1744 | } | |
1745 | } | |
1746 | ||
1747 | DBG("Start kernel tracing"); | |
1748 | ret = kernel_start_session(cmd_ctx->session->kernel_session); | |
8c0faa1d | 1749 | if (ret < 0) { |
f3ed775e DG |
1750 | ERR("Kernel start session failed"); |
1751 | ret = LTTCOMM_KERN_START_FAIL; | |
8c0faa1d DG |
1752 | goto error; |
1753 | } | |
8c0faa1d | 1754 | |
f3ed775e DG |
1755 | ret = start_kernel_trace(cmd_ctx->session->kernel_session); |
1756 | if (ret < 0) { | |
1757 | ret = LTTCOMM_KERN_START_FAIL; | |
8c0faa1d DG |
1758 | goto error; |
1759 | } | |
8c0faa1d | 1760 | |
f3ed775e DG |
1761 | /* Quiescent wait after starting trace */ |
1762 | kernel_wait_quiescent(kernel_tracer_fd); | |
8c0faa1d DG |
1763 | } |
1764 | ||
f3ed775e | 1765 | /* TODO: Start all UST traces */ |
8c0faa1d DG |
1766 | |
1767 | ret = LTTCOMM_OK; | |
1768 | break; | |
1769 | } | |
f3ed775e | 1770 | case LTTNG_STOP_TRACE: |
8c0faa1d | 1771 | { |
f3ed775e | 1772 | struct ltt_kernel_channel *chan; |
8c0faa1d DG |
1773 | /* Setup lttng message with no payload */ |
1774 | ret = setup_lttng_msg(cmd_ctx, 0); | |
1775 | if (ret < 0) { | |
1776 | goto setup_error; | |
1777 | } | |
1778 | ||
f3ed775e DG |
1779 | /* Kernel tracer */ |
1780 | if (cmd_ctx->session->kernel_session != NULL) { | |
1781 | DBG("Stop kernel tracing"); | |
84291629 | 1782 | |
f3ed775e DG |
1783 | ret = kernel_metadata_flush_buffer(cmd_ctx->session->kernel_session->metadata_stream_fd); |
1784 | if (ret < 0) { | |
1785 | ERR("Kernel metadata flush failed"); | |
1786 | } | |
8c0faa1d | 1787 | |
f3ed775e DG |
1788 | cds_list_for_each_entry(chan, &cmd_ctx->session->kernel_session->channel_list.head, list) { |
1789 | ret = kernel_flush_buffer(chan); | |
1790 | if (ret < 0) { | |
1791 | ERR("Kernel flush buffer error"); | |
1792 | } | |
1793 | } | |
1794 | ||
1795 | ret = kernel_stop_session(cmd_ctx->session->kernel_session); | |
1796 | if (ret < 0) { | |
1797 | ERR("Kernel stop session failed"); | |
1798 | ret = LTTCOMM_KERN_STOP_FAIL; | |
1799 | goto error; | |
1800 | } | |
1801 | ||
1802 | /* Quiescent wait after stopping trace */ | |
1803 | kernel_wait_quiescent(kernel_tracer_fd); | |
8c0faa1d DG |
1804 | } |
1805 | ||
f3ed775e | 1806 | /* TODO : User-space tracer */ |
8c0faa1d DG |
1807 | |
1808 | ret = LTTCOMM_OK; | |
1809 | break; | |
1810 | } | |
5e16da05 MD |
1811 | case LTTNG_CREATE_SESSION: |
1812 | { | |
5461b305 DG |
1813 | /* Setup lttng message with no payload */ |
1814 | ret = setup_lttng_msg(cmd_ctx, 0); | |
1815 | if (ret < 0) { | |
1816 | goto setup_error; | |
1817 | } | |
1818 | ||
f3ed775e | 1819 | ret = create_session(cmd_ctx->lsm->session_name, cmd_ctx->lsm->path); |
5e16da05 | 1820 | if (ret < 0) { |
f3ed775e | 1821 | if (ret == -EEXIST) { |
5e16da05 MD |
1822 | ret = LTTCOMM_EXIST_SESS; |
1823 | } else { | |
aaf97519 | 1824 | ret = LTTCOMM_FATAL; |
aaf97519 | 1825 | } |
5461b305 | 1826 | goto error; |
8028d920 | 1827 | } |
1657e9bb | 1828 | |
5461b305 | 1829 | ret = LTTCOMM_OK; |
5e16da05 MD |
1830 | break; |
1831 | } | |
1832 | case LTTNG_DESTROY_SESSION: | |
1833 | { | |
5461b305 DG |
1834 | /* Setup lttng message with no payload */ |
1835 | ret = setup_lttng_msg(cmd_ctx, 0); | |
1836 | if (ret < 0) { | |
1837 | goto setup_error; | |
1838 | } | |
1839 | ||
f3ed775e DG |
1840 | /* Clean kernel session teardown */ |
1841 | teardown_kernel_session(cmd_ctx->session); | |
1842 | ||
1843 | ret = destroy_session(cmd_ctx->lsm->session_name); | |
5e16da05 | 1844 | if (ret < 0) { |
f3ed775e | 1845 | ret = LTTCOMM_FATAL; |
5461b305 | 1846 | goto error; |
5e16da05 | 1847 | } |
1657e9bb | 1848 | |
7a485870 DG |
1849 | /* |
1850 | * Must notify the kernel thread here to update it's pollfd in order to | |
1851 | * remove the channel(s)' fd just destroyed. | |
1852 | */ | |
1853 | ret = notify_kernel_pollfd(); | |
1854 | if (ret < 0) { | |
1855 | ret = LTTCOMM_FATAL; | |
1856 | goto error; | |
1857 | } | |
1858 | ||
5461b305 DG |
1859 | ret = LTTCOMM_OK; |
1860 | break; | |
5e16da05 | 1861 | } |
f3ed775e | 1862 | /* |
9f19cc17 | 1863 | case UST_CREATE_TRACE: |
5e16da05 | 1864 | { |
9f19cc17 DG |
1865 | ret = setup_lttng_msg(cmd_ctx, 0); |
1866 | if (ret < 0) { | |
1867 | goto setup_error; | |
1868 | } | |
1657e9bb | 1869 | |
9f19cc17 DG |
1870 | ret = ust_create_trace(cmd_ctx); |
1871 | if (ret < 0) { | |
5461b305 | 1872 | goto error; |
1657e9bb | 1873 | } |
9f19cc17 DG |
1874 | break; |
1875 | } | |
1876 | case UST_START_TRACE: | |
1877 | { | |
1878 | ret = setup_lttng_msg(cmd_ctx, 0); | |
5461b305 DG |
1879 | if (ret < 0) { |
1880 | goto setup_error; | |
df0da139 | 1881 | } |
ca95a216 | 1882 | |
9f19cc17 DG |
1883 | ret = ust_start_trace(cmd_ctx); |
1884 | if (ret < 0) { | |
1885 | goto setup_error; | |
1886 | } | |
5e16da05 MD |
1887 | break; |
1888 | } | |
9f19cc17 | 1889 | case UST_STOP_TRACE: |
5e16da05 | 1890 | { |
5461b305 | 1891 | ret = setup_lttng_msg(cmd_ctx, 0); |
5e16da05 | 1892 | if (ret < 0) { |
5461b305 | 1893 | goto setup_error; |
fac6795d | 1894 | } |
ce3d728c | 1895 | |
9f19cc17 | 1896 | ret = ust_stop_trace(cmd_ctx); |
5461b305 | 1897 | if (ret < 0) { |
9f19cc17 | 1898 | goto setup_error; |
5461b305 DG |
1899 | } |
1900 | break; | |
5e16da05 | 1901 | } |
f3ed775e | 1902 | */ |
9f19cc17 | 1903 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 1904 | { |
4b222185 | 1905 | size_t nb_dom = 0; |
5461b305 | 1906 | |
9f19cc17 DG |
1907 | if (cmd_ctx->session->kernel_session != NULL) { |
1908 | nb_dom++; | |
ce3d728c | 1909 | } |
520ff687 | 1910 | |
9f19cc17 DG |
1911 | nb_dom += cmd_ctx->session->ust_trace_count; |
1912 | ||
1913 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_domain) * nb_dom); | |
5461b305 DG |
1914 | if (ret < 0) { |
1915 | goto setup_error; | |
520ff687 | 1916 | } |
57167058 | 1917 | |
9f19cc17 DG |
1918 | ((struct lttng_domain *)(cmd_ctx->llm->payload))[0].type = |
1919 | LTTNG_DOMAIN_KERNEL; | |
5e16da05 | 1920 | |
9f19cc17 | 1921 | /* TODO: User-space tracer domain support */ |
5461b305 | 1922 | ret = LTTCOMM_OK; |
5e16da05 MD |
1923 | break; |
1924 | } | |
9f19cc17 | 1925 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 1926 | { |
9f19cc17 DG |
1927 | /* |
1928 | * TODO: Only kernel channels are listed here. UST listing | |
1929 | * is needed on lttng-ust 2.0 release. | |
1930 | */ | |
1931 | size_t nb_chan = 0; | |
1932 | if (cmd_ctx->session->kernel_session != NULL) { | |
1933 | nb_chan += cmd_ctx->session->kernel_session->channel_count; | |
5461b305 | 1934 | } |
ca95a216 | 1935 | |
9f19cc17 DG |
1936 | ret = setup_lttng_msg(cmd_ctx, |
1937 | sizeof(struct lttng_channel) * nb_chan); | |
5461b305 DG |
1938 | if (ret < 0) { |
1939 | goto setup_error; | |
1940 | } | |
9f19cc17 DG |
1941 | |
1942 | list_lttng_channels(cmd_ctx->session, | |
1943 | (struct lttng_channel *)(cmd_ctx->llm->payload)); | |
1944 | ||
1945 | ret = LTTCOMM_OK; | |
5461b305 | 1946 | break; |
5e16da05 | 1947 | } |
9f19cc17 | 1948 | case LTTNG_LIST_EVENTS: |
5e16da05 | 1949 | { |
9f19cc17 DG |
1950 | /* |
1951 | * TODO: Only kernel events are listed here. UST listing | |
1952 | * is needed on lttng-ust 2.0 release. | |
1953 | */ | |
1954 | size_t nb_event = 0; | |
1955 | struct ltt_kernel_channel *kchan = NULL; | |
1956 | ||
1957 | if (cmd_ctx->session->kernel_session != NULL) { | |
1958 | kchan = get_kernel_channel_by_name(cmd_ctx->lsm->u.list.channel_name, | |
1959 | cmd_ctx->session->kernel_session); | |
1960 | if (kchan == NULL) { | |
1961 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
1962 | goto error; | |
1963 | } | |
1964 | nb_event += kchan->event_count; | |
5461b305 | 1965 | } |
ca95a216 | 1966 | |
9f19cc17 DG |
1967 | ret = setup_lttng_msg(cmd_ctx, |
1968 | sizeof(struct lttng_event) * nb_event); | |
5461b305 DG |
1969 | if (ret < 0) { |
1970 | goto setup_error; | |
1971 | } | |
9f19cc17 DG |
1972 | |
1973 | DBG("Listing events (%ld events)", nb_event); | |
1974 | ||
1975 | list_lttng_events(kchan, | |
1976 | (struct lttng_event *)(cmd_ctx->llm->payload)); | |
1977 | ||
1978 | ret = LTTCOMM_OK; | |
5461b305 | 1979 | break; |
5e16da05 MD |
1980 | } |
1981 | case LTTNG_LIST_SESSIONS: | |
1982 | { | |
6c9cc2ab | 1983 | lock_session_list(); |
5461b305 | 1984 | |
6c9cc2ab | 1985 | if (session_list_ptr->count == 0) { |
f3ed775e | 1986 | ret = LTTCOMM_NO_SESSION; |
36a83748 | 1987 | unlock_session_list(); |
5461b305 | 1988 | goto error; |
57167058 | 1989 | } |
5e16da05 | 1990 | |
6c9cc2ab DG |
1991 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * |
1992 | session_list_ptr->count); | |
5461b305 | 1993 | if (ret < 0) { |
36a83748 | 1994 | unlock_session_list(); |
5461b305 | 1995 | goto setup_error; |
e065084a | 1996 | } |
5e16da05 | 1997 | |
6c9cc2ab DG |
1998 | /* Filled the session array */ |
1999 | list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload)); | |
2000 | ||
2001 | unlock_session_list(); | |
5e16da05 | 2002 | |
5461b305 | 2003 | ret = LTTCOMM_OK; |
5e16da05 MD |
2004 | break; |
2005 | } | |
2006 | default: | |
2007 | /* Undefined command */ | |
5461b305 DG |
2008 | ret = setup_lttng_msg(cmd_ctx, 0); |
2009 | if (ret < 0) { | |
2010 | goto setup_error; | |
2011 | } | |
2012 | ||
5e16da05 | 2013 | ret = LTTCOMM_UND; |
5461b305 | 2014 | break; |
fac6795d DG |
2015 | } |
2016 | ||
5461b305 DG |
2017 | /* Set return code */ |
2018 | cmd_ctx->llm->ret_code = ret; | |
ca95a216 | 2019 | |
b5541356 DG |
2020 | if (cmd_ctx->session) { |
2021 | unlock_session(cmd_ctx->session); | |
2022 | } | |
2023 | ||
e065084a DG |
2024 | return ret; |
2025 | ||
5461b305 | 2026 | error: |
5461b305 DG |
2027 | if (cmd_ctx->llm == NULL) { |
2028 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 2029 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
2030 | goto setup_error; |
2031 | } | |
2032 | } | |
e065084a | 2033 | /* Notify client of error */ |
5461b305 | 2034 | cmd_ctx->llm->ret_code = ret; |
e065084a | 2035 | |
5461b305 | 2036 | setup_error: |
b5541356 DG |
2037 | if (cmd_ctx->session) { |
2038 | unlock_session(cmd_ctx->session); | |
2039 | } | |
8028d920 | 2040 | return ret; |
fac6795d DG |
2041 | } |
2042 | ||
1d4b027a | 2043 | /* |
d063d709 DG |
2044 | * This thread manage all clients request using the unix client socket for |
2045 | * communication. | |
1d4b027a DG |
2046 | */ |
2047 | static void *thread_manage_clients(void *data) | |
2048 | { | |
273ea72c DG |
2049 | int sock = 0, ret; |
2050 | struct command_ctx *cmd_ctx = NULL; | |
2051 | struct pollfd pollfd[2]; | |
1d4b027a DG |
2052 | |
2053 | DBG("[thread] Manage client started"); | |
2054 | ||
2055 | ret = lttcomm_listen_unix_sock(client_sock); | |
2056 | if (ret < 0) { | |
2057 | goto error; | |
2058 | } | |
2059 | ||
273ea72c DG |
2060 | /* First fd is always the quit pipe */ |
2061 | pollfd[0].fd = thread_quit_pipe[0]; | |
2062 | ||
2063 | /* Apps socket */ | |
2064 | pollfd[1].fd = client_sock; | |
2065 | pollfd[1].events = POLLIN; | |
2066 | ||
1d4b027a DG |
2067 | /* Notify parent pid that we are ready |
2068 | * to accept command for client side. | |
2069 | */ | |
2070 | if (opt_sig_parent) { | |
2071 | kill(ppid, SIGCHLD); | |
2072 | } | |
2073 | ||
2074 | while (1) { | |
1d4b027a | 2075 | DBG("Accepting client command ..."); |
273ea72c DG |
2076 | |
2077 | /* Inifinite blocking call, waiting for transmission */ | |
2078 | ret = poll(pollfd, 2, -1); | |
2079 | if (ret < 0) { | |
2080 | perror("poll client thread"); | |
2081 | goto error; | |
2082 | } | |
2083 | ||
2084 | /* Thread quit pipe has been closed. Killing thread. */ | |
2085 | if (pollfd[0].revents == POLLNVAL) { | |
2086 | goto error; | |
2087 | } else if (pollfd[1].revents == POLLERR) { | |
2088 | ERR("Client socket poll error"); | |
2089 | goto error; | |
2090 | } | |
2091 | ||
1d4b027a DG |
2092 | sock = lttcomm_accept_unix_sock(client_sock); |
2093 | if (sock < 0) { | |
2094 | goto error; | |
2095 | } | |
2096 | ||
2097 | /* Allocate context command to process the client request */ | |
2098 | cmd_ctx = malloc(sizeof(struct command_ctx)); | |
2099 | ||
2100 | /* Allocate data buffer for reception */ | |
2101 | cmd_ctx->lsm = malloc(sizeof(struct lttcomm_session_msg)); | |
2102 | cmd_ctx->llm = NULL; | |
2103 | cmd_ctx->session = NULL; | |
2104 | ||
2105 | /* | |
2106 | * Data is received from the lttng client. The struct | |
2107 | * lttcomm_session_msg (lsm) contains the command and data request of | |
2108 | * the client. | |
2109 | */ | |
2110 | DBG("Receiving data from client ..."); | |
2111 | ret = lttcomm_recv_unix_sock(sock, cmd_ctx->lsm, sizeof(struct lttcomm_session_msg)); | |
2112 | if (ret <= 0) { | |
2113 | continue; | |
2114 | } | |
2115 | ||
f7776ea7 DG |
2116 | // TODO: Validate cmd_ctx including sanity check for security purpose. |
2117 | ||
1d4b027a DG |
2118 | /* |
2119 | * This function dispatch the work to the kernel or userspace tracer | |
2120 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
2121 | * informations for the client. The command context struct contains | |
2122 | * everything this function may needs. | |
2123 | */ | |
2124 | ret = process_client_msg(cmd_ctx); | |
2125 | if (ret < 0) { | |
2126 | /* TODO: Inform client somehow of the fatal error. At this point, | |
2127 | * ret < 0 means that a malloc failed (ENOMEM). */ | |
2128 | /* Error detected but still accept command */ | |
a2fb29a5 | 2129 | clean_command_ctx(&cmd_ctx); |
1d4b027a DG |
2130 | continue; |
2131 | } | |
2132 | ||
2133 | DBG("Sending response (size: %d, retcode: %d)", | |
2134 | cmd_ctx->lttng_msg_size, cmd_ctx->llm->ret_code); | |
2135 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); | |
2136 | if (ret < 0) { | |
2137 | ERR("Failed to send data back to client"); | |
2138 | } | |
2139 | ||
a2fb29a5 | 2140 | clean_command_ctx(&cmd_ctx); |
d6e4fca4 DG |
2141 | |
2142 | /* End of transmission */ | |
2143 | close(sock); | |
1d4b027a DG |
2144 | } |
2145 | ||
2146 | error: | |
273ea72c DG |
2147 | DBG("Client thread dying"); |
2148 | if (client_sock) { | |
2149 | close(client_sock); | |
2150 | } | |
2151 | if (sock) { | |
2152 | close(sock); | |
2153 | } | |
2154 | ||
2155 | unlink(client_unix_sock_path); | |
2156 | ||
a2fb29a5 | 2157 | clean_command_ctx(&cmd_ctx); |
1d4b027a DG |
2158 | return NULL; |
2159 | } | |
2160 | ||
2161 | ||
fac6795d DG |
2162 | /* |
2163 | * usage function on stderr | |
2164 | */ | |
2165 | static void usage(void) | |
2166 | { | |
b716ce68 | 2167 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
2168 | fprintf(stderr, " -h, --help Display this usage.\n"); |
2169 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
2170 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
2171 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
2172 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
2173 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); | |
2174 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
2175 | fprintf(stderr, " -V, --version Show version number.\n"); | |
2176 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
2177 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
2178 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
fac6795d DG |
2179 | } |
2180 | ||
2181 | /* | |
2182 | * daemon argument parsing | |
2183 | */ | |
2184 | static int parse_args(int argc, char **argv) | |
2185 | { | |
2186 | int c; | |
2187 | ||
2188 | static struct option long_options[] = { | |
2189 | { "client-sock", 1, 0, 'c' }, | |
2190 | { "apps-sock", 1, 0, 'a' }, | |
d6f42150 DG |
2191 | { "kconsumerd-cmd-sock", 1, 0, 0 }, |
2192 | { "kconsumerd-err-sock", 1, 0, 0 }, | |
fac6795d | 2193 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 2194 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
2195 | { "help", 0, 0, 'h' }, |
2196 | { "group", 1, 0, 'g' }, | |
2197 | { "version", 0, 0, 'V' }, | |
75462a81 | 2198 | { "quiet", 0, 0, 'q' }, |
3f9947db | 2199 | { "verbose", 0, 0, 'v' }, |
fac6795d DG |
2200 | { NULL, 0, 0, 0 } |
2201 | }; | |
2202 | ||
2203 | while (1) { | |
2204 | int option_index = 0; | |
d6f42150 | 2205 | c = getopt_long(argc, argv, "dhqvVS" "a:c:g:s:E:C:", long_options, &option_index); |
fac6795d DG |
2206 | if (c == -1) { |
2207 | break; | |
2208 | } | |
2209 | ||
2210 | switch (c) { | |
2211 | case 0: | |
2212 | fprintf(stderr, "option %s", long_options[option_index].name); | |
2213 | if (optarg) { | |
2214 | fprintf(stderr, " with arg %s\n", optarg); | |
2215 | } | |
2216 | break; | |
b716ce68 | 2217 | case 'c': |
fac6795d DG |
2218 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
2219 | break; | |
2220 | case 'a': | |
2221 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
2222 | break; | |
2223 | case 'd': | |
2224 | opt_daemon = 1; | |
2225 | break; | |
2226 | case 'g': | |
2227 | opt_tracing_group = strdup(optarg); | |
2228 | break; | |
2229 | case 'h': | |
2230 | usage(); | |
2231 | exit(EXIT_FAILURE); | |
2232 | case 'V': | |
2233 | fprintf(stdout, "%s\n", VERSION); | |
2234 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
2235 | case 'S': |
2236 | opt_sig_parent = 1; | |
2237 | break; | |
d6f42150 DG |
2238 | case 'E': |
2239 | snprintf(kconsumerd_err_unix_sock_path, PATH_MAX, "%s", optarg); | |
2240 | break; | |
2241 | case 'C': | |
2242 | snprintf(kconsumerd_cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
2243 | break; | |
75462a81 DG |
2244 | case 'q': |
2245 | opt_quiet = 1; | |
2246 | break; | |
3f9947db | 2247 | case 'v': |
53086306 DG |
2248 | /* Verbose level can increase using multiple -v */ |
2249 | opt_verbose += 1; | |
3f9947db | 2250 | break; |
fac6795d DG |
2251 | default: |
2252 | /* Unknown option or other error. | |
2253 | * Error is printed by getopt, just return */ | |
2254 | return -1; | |
2255 | } | |
2256 | } | |
2257 | ||
2258 | return 0; | |
2259 | } | |
2260 | ||
2261 | /* | |
d063d709 | 2262 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
2263 | * apps_sock - The communication socket for all UST apps. |
2264 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d DG |
2265 | */ |
2266 | static int init_daemon_socket() | |
2267 | { | |
2268 | int ret = 0; | |
2269 | mode_t old_umask; | |
2270 | ||
2271 | old_umask = umask(0); | |
2272 | ||
2273 | /* Create client tool unix socket */ | |
d6f42150 DG |
2274 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
2275 | if (client_sock < 0) { | |
2276 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
2277 | ret = -1; |
2278 | goto end; | |
2279 | } | |
2280 | ||
2281 | /* File permission MUST be 660 */ | |
2282 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
2283 | if (ret < 0) { | |
d6f42150 | 2284 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
fac6795d DG |
2285 | perror("chmod"); |
2286 | goto end; | |
2287 | } | |
2288 | ||
2289 | /* Create the application unix socket */ | |
d6f42150 DG |
2290 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
2291 | if (apps_sock < 0) { | |
2292 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
2293 | ret = -1; |
2294 | goto end; | |
2295 | } | |
2296 | ||
d6f42150 | 2297 | /* File permission MUST be 666 */ |
fac6795d DG |
2298 | ret = chmod(apps_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); |
2299 | if (ret < 0) { | |
d6f42150 | 2300 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
fac6795d DG |
2301 | perror("chmod"); |
2302 | goto end; | |
2303 | } | |
2304 | ||
2305 | end: | |
2306 | umask(old_umask); | |
2307 | return ret; | |
2308 | } | |
2309 | ||
2310 | /* | |
d063d709 | 2311 | * Check if the global socket is available. If yes, error is returned. |
fac6795d DG |
2312 | */ |
2313 | static int check_existing_daemon() | |
2314 | { | |
2315 | int ret; | |
2316 | ||
2317 | ret = access(client_unix_sock_path, F_OK); | |
2318 | if (ret == 0) { | |
2319 | ret = access(apps_unix_sock_path, F_OK); | |
2320 | } | |
2321 | ||
2322 | return ret; | |
2323 | } | |
2324 | ||
fac6795d | 2325 | /* |
d063d709 | 2326 | * Set the tracing group gid onto the client socket. |
5e16da05 | 2327 | * |
d063d709 DG |
2328 | * Race window between mkdir and chown is OK because we are going from more |
2329 | * permissive (root.root) to les permissive (root.tracing). | |
fac6795d | 2330 | */ |
d6f42150 | 2331 | static int set_permissions(void) |
fac6795d DG |
2332 | { |
2333 | int ret; | |
2334 | struct group *grp; | |
2335 | ||
2336 | /* Decide which group name to use */ | |
2337 | (opt_tracing_group != NULL) ? | |
2338 | (grp = getgrnam(opt_tracing_group)) : | |
2339 | (grp = getgrnam(default_tracing_group)); | |
2340 | ||
2341 | if (grp == NULL) { | |
a463f419 DG |
2342 | if (is_root) { |
2343 | WARN("No tracing group detected"); | |
2344 | ret = 0; | |
2345 | } else { | |
2346 | ERR("Missing tracing group. Aborting execution."); | |
2347 | ret = -1; | |
2348 | } | |
fac6795d DG |
2349 | goto end; |
2350 | } | |
2351 | ||
d6f42150 DG |
2352 | /* Set lttng run dir */ |
2353 | ret = chown(LTTNG_RUNDIR, 0, grp->gr_gid); | |
2354 | if (ret < 0) { | |
2355 | ERR("Unable to set group on " LTTNG_RUNDIR); | |
2356 | perror("chown"); | |
2357 | } | |
2358 | ||
2359 | /* lttng client socket path */ | |
fac6795d DG |
2360 | ret = chown(client_unix_sock_path, 0, grp->gr_gid); |
2361 | if (ret < 0) { | |
d6f42150 DG |
2362 | ERR("Unable to set group on %s", client_unix_sock_path); |
2363 | perror("chown"); | |
2364 | } | |
2365 | ||
2366 | /* kconsumerd error socket path */ | |
2367 | ret = chown(kconsumerd_err_unix_sock_path, 0, grp->gr_gid); | |
2368 | if (ret < 0) { | |
2369 | ERR("Unable to set group on %s", kconsumerd_err_unix_sock_path); | |
fac6795d DG |
2370 | perror("chown"); |
2371 | } | |
2372 | ||
d6f42150 | 2373 | DBG("All permissions are set"); |
e07ae692 | 2374 | |
fac6795d DG |
2375 | end: |
2376 | return ret; | |
2377 | } | |
2378 | ||
7a485870 | 2379 | /* |
d063d709 | 2380 | * Create the pipe used to wake up the kernel thread. |
7a485870 DG |
2381 | */ |
2382 | static int create_kernel_poll_pipe(void) | |
2383 | { | |
2384 | return pipe2(kernel_poll_pipe, O_CLOEXEC); | |
2385 | } | |
2386 | ||
d6f42150 | 2387 | /* |
d063d709 | 2388 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 DG |
2389 | */ |
2390 | static int create_lttng_rundir(void) | |
2391 | { | |
2392 | int ret; | |
2393 | ||
2394 | ret = mkdir(LTTNG_RUNDIR, S_IRWXU | S_IRWXG ); | |
2395 | if (ret < 0) { | |
b1f11e69 DG |
2396 | if (errno != EEXIST) { |
2397 | ERR("Unable to create " LTTNG_RUNDIR); | |
2398 | goto error; | |
2399 | } else { | |
2400 | ret = 0; | |
2401 | } | |
d6f42150 DG |
2402 | } |
2403 | ||
2404 | error: | |
2405 | return ret; | |
2406 | } | |
2407 | ||
2408 | /* | |
d063d709 DG |
2409 | * Setup sockets and directory needed by the kconsumerd communication with the |
2410 | * session daemon. | |
d6f42150 DG |
2411 | */ |
2412 | static int set_kconsumerd_sockets(void) | |
2413 | { | |
2414 | int ret; | |
2415 | ||
2416 | if (strlen(kconsumerd_err_unix_sock_path) == 0) { | |
2417 | snprintf(kconsumerd_err_unix_sock_path, PATH_MAX, KCONSUMERD_ERR_SOCK_PATH); | |
2418 | } | |
2419 | ||
2420 | if (strlen(kconsumerd_cmd_unix_sock_path) == 0) { | |
2421 | snprintf(kconsumerd_cmd_unix_sock_path, PATH_MAX, KCONSUMERD_CMD_SOCK_PATH); | |
2422 | } | |
2423 | ||
2424 | ret = mkdir(KCONSUMERD_PATH, S_IRWXU | S_IRWXG); | |
2425 | if (ret < 0) { | |
6beb2242 DG |
2426 | if (errno != EEXIST) { |
2427 | ERR("Failed to create " KCONSUMERD_PATH); | |
2428 | goto error; | |
2429 | } | |
2430 | ret = 0; | |
d6f42150 DG |
2431 | } |
2432 | ||
2433 | /* Create the kconsumerd error unix socket */ | |
2434 | kconsumerd_err_sock = lttcomm_create_unix_sock(kconsumerd_err_unix_sock_path); | |
2435 | if (kconsumerd_err_sock < 0) { | |
2436 | ERR("Create unix sock failed: %s", kconsumerd_err_unix_sock_path); | |
2437 | ret = -1; | |
2438 | goto error; | |
2439 | } | |
2440 | ||
2441 | /* File permission MUST be 660 */ | |
2442 | ret = chmod(kconsumerd_err_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
2443 | if (ret < 0) { | |
2444 | ERR("Set file permissions failed: %s", kconsumerd_err_unix_sock_path); | |
2445 | perror("chmod"); | |
2446 | goto error; | |
2447 | } | |
2448 | ||
2449 | error: | |
2450 | return ret; | |
2451 | } | |
2452 | ||
fac6795d | 2453 | /* |
d063d709 | 2454 | * Signal handler for the daemon |
fac6795d DG |
2455 | */ |
2456 | static void sighandler(int sig) | |
2457 | { | |
2458 | switch (sig) { | |
2459 | case SIGPIPE: | |
e07ae692 | 2460 | DBG("SIGPIPE catched"); |
87378cf5 | 2461 | return; |
fac6795d | 2462 | case SIGINT: |
e07ae692 DG |
2463 | DBG("SIGINT catched"); |
2464 | cleanup(); | |
2465 | break; | |
fac6795d | 2466 | case SIGTERM: |
e07ae692 | 2467 | DBG("SIGTERM catched"); |
fac6795d | 2468 | cleanup(); |
686204ab | 2469 | break; |
fac6795d DG |
2470 | default: |
2471 | break; | |
2472 | } | |
2473 | ||
2474 | exit(EXIT_SUCCESS); | |
2475 | } | |
2476 | ||
2477 | /* | |
d063d709 | 2478 | * Setup signal handler for : |
1d4b027a | 2479 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 2480 | */ |
1d4b027a | 2481 | static int set_signal_handler(void) |
fac6795d | 2482 | { |
1d4b027a DG |
2483 | int ret = 0; |
2484 | struct sigaction sa; | |
2485 | sigset_t sigset; | |
fac6795d | 2486 | |
1d4b027a DG |
2487 | if ((ret = sigemptyset(&sigset)) < 0) { |
2488 | perror("sigemptyset"); | |
2489 | return ret; | |
2490 | } | |
d6f42150 | 2491 | |
1d4b027a DG |
2492 | sa.sa_handler = sighandler; |
2493 | sa.sa_mask = sigset; | |
2494 | sa.sa_flags = 0; | |
2495 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
2496 | perror("sigaction"); | |
2497 | return ret; | |
d6f42150 DG |
2498 | } |
2499 | ||
1d4b027a DG |
2500 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
2501 | perror("sigaction"); | |
2502 | return ret; | |
d6f42150 | 2503 | } |
aaf26714 | 2504 | |
1d4b027a DG |
2505 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
2506 | perror("sigaction"); | |
2507 | return ret; | |
8c0faa1d DG |
2508 | } |
2509 | ||
1d4b027a DG |
2510 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
2511 | ||
2512 | return ret; | |
fac6795d DG |
2513 | } |
2514 | ||
f3ed775e | 2515 | /* |
d063d709 DG |
2516 | * Set open files limit to unlimited. This daemon can open a large number of |
2517 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
2518 | */ |
2519 | static void set_ulimit(void) | |
2520 | { | |
2521 | int ret; | |
2522 | struct rlimit lim; | |
2523 | ||
a88df331 | 2524 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
2525 | lim.rlim_cur = 65535; |
2526 | lim.rlim_max = 65535; | |
2527 | ||
2528 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
2529 | if (ret < 0) { | |
2530 | perror("failed to set open files limit"); | |
2531 | } | |
2532 | } | |
2533 | ||
fac6795d DG |
2534 | /* |
2535 | * main | |
2536 | */ | |
2537 | int main(int argc, char **argv) | |
2538 | { | |
fac6795d DG |
2539 | int ret = 0; |
2540 | void *status; | |
b082db07 | 2541 | const char *home_path; |
fac6795d | 2542 | |
273ea72c DG |
2543 | /* Create thread quit pipe */ |
2544 | if (init_thread_quit_pipe() < 0) { | |
a88df331 | 2545 | goto exit; |
273ea72c DG |
2546 | } |
2547 | ||
fac6795d DG |
2548 | /* Parse arguments */ |
2549 | progname = argv[0]; | |
2550 | if ((ret = parse_args(argc, argv) < 0)) { | |
a88df331 | 2551 | goto exit; |
fac6795d DG |
2552 | } |
2553 | ||
2554 | /* Daemonize */ | |
2555 | if (opt_daemon) { | |
53094c05 DG |
2556 | ret = daemon(0, 0); |
2557 | if (ret < 0) { | |
2558 | perror("daemon"); | |
a88df331 | 2559 | goto exit; |
53094c05 | 2560 | } |
fac6795d DG |
2561 | } |
2562 | ||
2563 | /* Check if daemon is UID = 0 */ | |
2564 | is_root = !getuid(); | |
2565 | ||
fac6795d | 2566 | if (is_root) { |
d6f42150 DG |
2567 | ret = create_lttng_rundir(); |
2568 | if (ret < 0) { | |
a88df331 | 2569 | goto exit; |
d6f42150 DG |
2570 | } |
2571 | ||
fac6795d | 2572 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
2573 | snprintf(apps_unix_sock_path, PATH_MAX, |
2574 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
2575 | } |
2576 | ||
2577 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
2578 | snprintf(client_unix_sock_path, PATH_MAX, |
2579 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
2580 | } | |
fac6795d | 2581 | } else { |
b082db07 DG |
2582 | home_path = get_home_dir(); |
2583 | if (home_path == NULL) { | |
273ea72c DG |
2584 | /* TODO: Add --socket PATH option */ |
2585 | ERR("Can't get HOME directory for sockets creation."); | |
a88df331 | 2586 | goto exit; |
b082db07 DG |
2587 | } |
2588 | ||
fac6795d | 2589 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 2590 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 2591 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
2592 | } |
2593 | ||
2594 | /* Set the cli tool unix socket path */ | |
2595 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 2596 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 2597 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d DG |
2598 | } |
2599 | } | |
2600 | ||
847177cd DG |
2601 | DBG("Client socket path %s", client_unix_sock_path); |
2602 | DBG("Application socket path %s", apps_unix_sock_path); | |
2603 | ||
273ea72c DG |
2604 | /* |
2605 | * See if daemon already exist. If any of the two socket needed by the | |
2606 | * daemon are present, this test fails. However, if the daemon is killed | |
2607 | * with a SIGKILL, those unix socket must be unlinked by hand. | |
fac6795d DG |
2608 | */ |
2609 | if ((ret = check_existing_daemon()) == 0) { | |
75462a81 | 2610 | ERR("Already running daemon.\n"); |
273ea72c | 2611 | /* |
a88df331 DG |
2612 | * We do not goto error because we must not cleanup() because a daemon |
2613 | * is already running. | |
ab118b20 | 2614 | */ |
a88df331 DG |
2615 | goto exit; |
2616 | } | |
2617 | ||
2618 | /* After this point, we can safely call cleanup() so goto error is used */ | |
2619 | ||
2620 | /* | |
2621 | * These actions must be executed as root. We do that *after* setting up | |
2622 | * the sockets path because we MUST make the check for another daemon using | |
2623 | * those paths *before* trying to set the kernel consumer sockets and init | |
2624 | * kernel tracer. | |
2625 | */ | |
2626 | if (is_root) { | |
2627 | ret = set_kconsumerd_sockets(); | |
2628 | if (ret < 0) { | |
2629 | goto error; | |
2630 | } | |
2631 | ||
2632 | /* Setup kernel tracer */ | |
2633 | init_kernel_tracer(); | |
2634 | ||
2635 | /* Set ulimit for open files */ | |
2636 | set_ulimit(); | |
fac6795d DG |
2637 | } |
2638 | ||
2639 | if (set_signal_handler() < 0) { | |
2640 | goto error; | |
2641 | } | |
2642 | ||
d6f42150 | 2643 | /* Setup the needed unix socket */ |
fac6795d DG |
2644 | if (init_daemon_socket() < 0) { |
2645 | goto error; | |
2646 | } | |
2647 | ||
2648 | /* Set credentials to socket */ | |
d6f42150 | 2649 | if (is_root && (set_permissions() < 0)) { |
fac6795d DG |
2650 | goto error; |
2651 | } | |
2652 | ||
5b8719f5 DG |
2653 | /* Get parent pid if -S, --sig-parent is specified. */ |
2654 | if (opt_sig_parent) { | |
2655 | ppid = getppid(); | |
2656 | } | |
2657 | ||
7a485870 DG |
2658 | /* Setup the kernel pipe for waking up the kernel thread */ |
2659 | if (create_kernel_poll_pipe() < 0) { | |
2660 | goto error; | |
2661 | } | |
2662 | ||
273ea72c DG |
2663 | /* |
2664 | * Get session list pointer. This pointer MUST NOT be free(). | |
2665 | * This list is statically declared in session.c | |
2666 | */ | |
b5541356 DG |
2667 | session_list_ptr = get_session_list(); |
2668 | ||
fac6795d DG |
2669 | while (1) { |
2670 | /* Create thread to manage the client socket */ | |
1d4b027a | 2671 | ret = pthread_create(&client_thread, NULL, thread_manage_clients, (void *) NULL); |
fac6795d DG |
2672 | if (ret != 0) { |
2673 | perror("pthread_create"); | |
2674 | goto error; | |
2675 | } | |
2676 | ||
2677 | /* Create thread to manage application socket */ | |
1d4b027a | 2678 | ret = pthread_create(&apps_thread, NULL, thread_manage_apps, (void *) NULL); |
fac6795d DG |
2679 | if (ret != 0) { |
2680 | perror("pthread_create"); | |
2681 | goto error; | |
2682 | } | |
2683 | ||
7a485870 DG |
2684 | /* Create kernel thread to manage kernel event */ |
2685 | ret = pthread_create(&kernel_thread, NULL, thread_manage_kernel, (void *) NULL); | |
2686 | if (ret != 0) { | |
2687 | perror("pthread_create"); | |
2688 | goto error; | |
2689 | } | |
2690 | ||
1d4b027a DG |
2691 | ret = pthread_join(client_thread, &status); |
2692 | if (ret != 0) { | |
2693 | perror("pthread_join"); | |
2694 | goto error; | |
fac6795d DG |
2695 | } |
2696 | } | |
2697 | ||
2698 | cleanup(); | |
5e16da05 | 2699 | exit(EXIT_SUCCESS); |
fac6795d DG |
2700 | |
2701 | error: | |
2702 | cleanup(); | |
a88df331 DG |
2703 | |
2704 | exit: | |
5e16da05 | 2705 | exit(EXIT_FAILURE); |
fac6795d | 2706 | } |