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[lttng-tools.git] / ltt-sessiond / main.c
CommitLineData
826d496d
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1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
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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
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6 * as published by the Free Software Foundation; only version 2
7 * of the License.
91d76f53 8 *
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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 *
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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.
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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>
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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>
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33#include <sys/shm.h>
34#include <sys/socket.h>
35#include <sys/stat.h>
36#include <sys/types.h>
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37#include <sys/time.h>
38#include <sys/resource.h>
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39#include <unistd.h>
40
41#include <urcu/list.h> /* URCU list library (-lurcu) */
5b97ec60 42#include <lttng/lttng.h>
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43
44#include "liblttsessiondcomm.h"
45#include "ltt-sessiond.h"
75462a81 46#include "lttngerr.h"
20fe2104 47#include "kernel-ctl.h"
9e78d6ae 48#include "ust-ctl.h"
5b74c7b1 49#include "session.h"
91d76f53 50#include "traceable-app.h"
5dc18550 51#include "lttng-kconsumerd.h"
8e68d1c8 52#include "utils.h"
fac6795d 53
75462a81 54/* Const values */
686204ab 55const char default_home_dir[] = DEFAULT_HOME_DIR;
64a23ac4 56const char default_tracing_group[] = LTTNG_DEFAULT_TRACING_GROUP;
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57const char default_ust_sock_dir[] = DEFAULT_UST_SOCK_DIR;
58const char default_global_apps_pipe[] = DEFAULT_GLOBAL_APPS_PIPE;
59
fac6795d 60/* Variables */
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61int opt_verbose; /* Not static for lttngerr.h */
62int opt_quiet; /* Not static for lttngerr.h */
d063d709 63
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64const char *progname;
65const char *opt_tracing_group;
5b8719f5 66static int opt_sig_parent;
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67static int opt_daemon;
68static int is_root; /* Set to 1 if the daemon is running as root */
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69static pid_t ppid; /* Parent PID for --sig-parent option */
70static pid_t kconsumerd_pid;
7a485870 71static struct pollfd *kernel_pollfd;
fac6795d 72
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73static char apps_unix_sock_path[PATH_MAX]; /* Global application Unix socket path */
74static char client_unix_sock_path[PATH_MAX]; /* Global client Unix socket path */
75static char kconsumerd_err_unix_sock_path[PATH_MAX]; /* kconsumerd error Unix socket path */
76static char kconsumerd_cmd_unix_sock_path[PATH_MAX]; /* kconsumerd command Unix socket path */
fac6795d 77
1d4b027a 78/* Sockets and FDs */
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79static int client_sock;
80static int apps_sock;
81static int kconsumerd_err_sock;
8c0faa1d 82static int kconsumerd_cmd_sock;
20fe2104 83static int kernel_tracer_fd;
7a485870 84static int kernel_poll_pipe[2];
1d4b027a 85
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86/*
87 * Quit pipe for all threads. This permits a single cancellation point
88 * for all threads when receiving an event on the pipe.
89 */
90static int thread_quit_pipe[2];
91
1d4b027a 92/* Pthread, Mutexes and Semaphores */
8c0faa1d 93static pthread_t kconsumerd_thread;
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94static pthread_t apps_thread;
95static pthread_t client_thread;
7a485870 96static pthread_t kernel_thread;
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97static sem_t kconsumerd_sem;
98
1d4b027a 99static pthread_mutex_t kconsumerd_pid_mutex; /* Mutex to control kconsumerd pid assignation */
fac6795d 100
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101/*
102 * Pointer initialized before thread creation.
103 *
104 * This points to the tracing session list containing the session count and a
105 * mutex lock. The lock MUST be taken if you iterate over the list. The lock
106 * MUST NOT be taken if you call a public function in session.c.
04ea676f 107 *
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108 * The lock is nested inside the structure: session_list_ptr->lock. Please use
109 * lock_session_list and unlock_session_list for lock acquisition.
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110 */
111static struct ltt_session_list *session_list_ptr;
112
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113/*
114 * Init quit pipe.
115 *
116 * Return -1 on error or 0 if all pipes are created.
117 */
118static int init_thread_quit_pipe(void)
119{
120 int ret;
121
122 ret = pipe2(thread_quit_pipe, O_CLOEXEC);
123 if (ret < 0) {
124 perror("thread quit pipe");
125 goto error;
126 }
127
128error:
129 return ret;
130}
131
fac6795d 132/*
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133 * Complete teardown of a kernel session. This free all data structure related
134 * to a kernel session and update counter.
fac6795d 135 */
1d4b027a 136static void teardown_kernel_session(struct ltt_session *session)
fac6795d 137{
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138 if (session->kernel_session != NULL) {
139 DBG("Tearing down kernel session");
c363b55d 140 trace_destroy_kernel_session(session->kernel_session);
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141 /* Extra precaution */
142 session->kernel_session = NULL;
fac6795d 143 }
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144}
145
146/*
d063d709 147 * Cleanup the daemon
fac6795d 148 */
1d4b027a 149static void cleanup()
fac6795d 150{
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151 int ret;
152 char *cmd;
af9737e9 153 struct ltt_session *sess, *stmp;
fac6795d 154
1d4b027a 155 DBG("Cleaning up");
e07ae692 156
1d4b027a 157 /* <fun> */
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158 MSG("\n%c[%d;%dm*** assert failed *** ==> %c[%dm%c[%d;%dm"
159 "Matthew, BEET driven development works!%c[%dm",
160 27, 1, 31, 27, 0, 27, 1, 33, 27, 0);
1d4b027a 161 /* </fun> */
fac6795d 162
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163 /* Stopping all threads */
164 DBG("Terminating all threads");
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165 close(thread_quit_pipe[0]);
166 close(thread_quit_pipe[1]);
fac6795d 167
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168 DBG("Removing %s directory", LTTNG_RUNDIR);
169 ret = asprintf(&cmd, "rm -rf " LTTNG_RUNDIR);
170 if (ret < 0) {
171 ERR("asprintf failed. Something is really wrong!");
172 }
5461b305 173
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174 /* Remove lttng run directory */
175 ret = system(cmd);
176 if (ret < 0) {
177 ERR("Unable to clean " LTTNG_RUNDIR);
178 }
5461b305 179
1d4b027a 180 DBG("Cleaning up all session");
fac6795d 181
b5541356 182 /* Destroy session list mutex */
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183 if (session_list_ptr != NULL) {
184 pthread_mutex_destroy(&session_list_ptr->lock);
185
186 /* Cleanup ALL session */
af9737e9 187 cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) {
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188 teardown_kernel_session(sess);
189 // TODO complete session cleanup (including UST)
190 }
191 }
192
193 pthread_mutex_destroy(&kconsumerd_pid_mutex);
b5541356 194
f3ed775e 195 DBG("Closing kernel fd");
1d4b027a 196 close(kernel_tracer_fd);
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197}
198
e065084a 199/*
d063d709 200 * Send data on a unix socket using the liblttsessiondcomm API.
e065084a 201 *
d063d709 202 * Return lttcomm error code.
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203 */
204static int send_unix_sock(int sock, void *buf, size_t len)
205{
206 /* Check valid length */
207 if (len <= 0) {
208 return -1;
209 }
210
211 return lttcomm_send_unix_sock(sock, buf, len);
212}
213
5461b305 214/*
d063d709 215 * Free memory of a command context structure.
5461b305 216 */
a2fb29a5 217static void clean_command_ctx(struct command_ctx **cmd_ctx)
5461b305 218{
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219 DBG("Clean command context structure");
220 if (*cmd_ctx) {
221 if ((*cmd_ctx)->llm) {
222 free((*cmd_ctx)->llm);
5461b305 223 }
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224 if ((*cmd_ctx)->lsm) {
225 free((*cmd_ctx)->lsm);
5461b305 226 }
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227 free(*cmd_ctx);
228 *cmd_ctx = NULL;
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229 }
230}
231
f3ed775e 232/*
d063d709 233 * Send all stream fds of kernel channel to the consumer.
f3ed775e 234 */
7a485870 235static int send_kconsumerd_channel_fds(int sock, struct ltt_kernel_channel *channel)
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236{
237 int ret;
238 size_t nb_fd;
239 struct ltt_kernel_stream *stream;
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240 struct lttcomm_kconsumerd_header lkh;
241 struct lttcomm_kconsumerd_msg lkm;
242
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243 DBG("Sending fds of channel %s to kernel consumer", channel->channel->name);
244
245 nb_fd = channel->stream_count;
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246
247 /* Setup header */
7a485870 248 lkh.payload_size = nb_fd * sizeof(struct lttcomm_kconsumerd_msg);
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249 lkh.cmd_type = ADD_STREAM;
250
251 DBG("Sending kconsumerd header");
252
253 ret = lttcomm_send_unix_sock(sock, &lkh, sizeof(struct lttcomm_kconsumerd_header));
254 if (ret < 0) {
255 perror("send kconsumerd header");
256 goto error;
257 }
258
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259 cds_list_for_each_entry(stream, &channel->stream_list.head, list) {
260 if (stream->fd != 0) {
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261 lkm.fd = stream->fd;
262 lkm.state = stream->state;
7a485870 263 lkm.max_sb_size = channel->channel->attr.subbuf_size;
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264 strncpy(lkm.path_name, stream->pathname, PATH_MAX);
265
266 DBG("Sending fd %d to kconsumerd", lkm.fd);
267
268 ret = lttcomm_send_fds_unix_sock(sock, &lkm, &lkm.fd, 1, sizeof(lkm));
269 if (ret < 0) {
270 perror("send kconsumerd fd");
271 goto error;
272 }
273 }
274 }
275
7a485870 276 DBG("Kconsumerd channel fds sent");
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277
278 return 0;
279
280error:
281 return ret;
282}
283
284/*
d063d709 285 * Send all stream fds of the kernel session to the consumer.
f3ed775e 286 */
7a485870 287static int send_kconsumerd_fds(int sock, struct ltt_kernel_session *session)
f3ed775e
DG
288{
289 int ret;
290 struct ltt_kernel_channel *chan;
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291 struct lttcomm_kconsumerd_header lkh;
292 struct lttcomm_kconsumerd_msg lkm;
293
294 /* Setup header */
295 lkh.payload_size = sizeof(struct lttcomm_kconsumerd_msg);
296 lkh.cmd_type = ADD_STREAM;
297
298 DBG("Sending kconsumerd header for metadata");
299
300 ret = lttcomm_send_unix_sock(sock, &lkh, sizeof(struct lttcomm_kconsumerd_header));
301 if (ret < 0) {
302 perror("send kconsumerd header");
303 goto error;
304 }
305
306 DBG("Sending metadata stream fd");
307
308 if (session->metadata_stream_fd != 0) {
309 /* Send metadata stream fd first */
310 lkm.fd = session->metadata_stream_fd;
311 lkm.state = ACTIVE_FD;
312 lkm.max_sb_size = session->metadata->conf->attr.subbuf_size;
313 strncpy(lkm.path_name, session->metadata->pathname, PATH_MAX);
314
315 ret = lttcomm_send_fds_unix_sock(sock, &lkm, &lkm.fd, 1, sizeof(lkm));
316 if (ret < 0) {
317 perror("send kconsumerd fd");
318 goto error;
319 }
320 }
f3ed775e 321
f3ed775e 322 cds_list_for_each_entry(chan, &session->channel_list.head, list) {
7a485870 323 ret = send_kconsumerd_channel_fds(sock, chan);
f3ed775e 324 if (ret < 0) {
7a485870 325 goto error;
f3ed775e
DG
326 }
327 }
328
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329 DBG("Kconsumerd fds (metadata and channel streams) sent");
330
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331 return 0;
332
333error:
334 return ret;
335}
336
97b1a726 337#ifdef DISABLED
fac6795d 338/*
d063d709
DG
339 * Return a socket connected to the libust communication socket of the
340 * application identified by the pid.
fac6795d 341 *
d063d709 342 * If the pid is not found in the traceable list, return -1 to indicate error.
fac6795d 343 */
471d1693 344static int ust_connect_app(pid_t pid)
fac6795d 345{
91d76f53
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346 int sock;
347 struct ltt_traceable_app *lta;
379473d2 348
e07ae692
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349 DBG("Connect to application pid %d", pid);
350
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351 lta = find_app_by_pid(pid);
352 if (lta == NULL) {
353 /* App not found */
7442b2ba 354 DBG("Application pid %d not found", pid);
379473d2
DG
355 return -1;
356 }
fac6795d 357
91d76f53 358 sock = ustctl_connect_pid(lta->pid);
fac6795d 359 if (sock < 0) {
62d3069f 360 ERR("Fail connecting to the PID %d", pid);
fac6795d
DG
361 }
362
363 return sock;
364}
97b1a726 365#endif /* DISABLED */
fac6795d
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366
367/*
d063d709
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368 * Notify apps by writing 42 to a named pipe using name. Every applications
369 * waiting for a ltt-sessiond will be notified and re-register automatically to
370 * the session daemon.
fac6795d 371 *
d063d709 372 * Return open or write error value.
fac6795d
DG
373 */
374static int notify_apps(const char *name)
375{
376 int fd;
377 int ret = -1;
378
e07ae692
DG
379 DBG("Notify the global application pipe");
380
fac6795d
DG
381 /* Try opening the global pipe */
382 fd = open(name, O_WRONLY);
383 if (fd < 0) {
384 goto error;
385 }
386
387 /* Notify by writing on the pipe */
388 ret = write(fd, "42", 2);
389 if (ret < 0) {
390 perror("write");
391 }
392
393error:
394 return ret;
395}
396
e065084a 397/*
d063d709
DG
398 * Setup the outgoing data buffer for the response (llm) by allocating the
399 * right amount of memory and copying the original information from the lsm
400 * structure.
ca95a216 401 *
d063d709 402 * Return total size of the buffer pointed by buf.
ca95a216 403 */
5461b305 404static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size)
ca95a216 405{
f3ed775e 406 int ret, buf_size;
ca95a216 407
f3ed775e 408 buf_size = size;
5461b305
DG
409
410 cmd_ctx->llm = malloc(sizeof(struct lttcomm_lttng_msg) + buf_size);
411 if (cmd_ctx->llm == NULL) {
ca95a216 412 perror("malloc");
5461b305 413 ret = -ENOMEM;
ca95a216
DG
414 goto error;
415 }
416
5461b305
DG
417 /* Copy common data */
418 cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type;
419 cmd_ctx->llm->pid = cmd_ctx->lsm->pid;
5461b305 420
5461b305
DG
421 cmd_ctx->llm->data_size = size;
422 cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size;
423
ca95a216
DG
424 return buf_size;
425
426error:
427 return ret;
428}
429
7a485870 430/*
d063d709
DG
431 * Update the kernel pollfd set of all channel fd available over all tracing
432 * session. Add the wakeup pipe at the end of the set.
7a485870
DG
433 */
434static int update_kernel_pollfd(void)
435{
436 int i = 0;
273ea72c
DG
437 /*
438 * The wakup pipe and the quit pipe are needed so the number of fds starts
439 * at 2 for those pipes.
440 */
441 unsigned int nb_fd = 2;
7a485870
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442 struct ltt_session *session;
443 struct ltt_kernel_channel *channel;
444
445 DBG("Updating kernel_pollfd");
446
447 /* Get the number of channel of all kernel session */
6c9cc2ab 448 lock_session_list();
b5541356
DG
449 cds_list_for_each_entry(session, &session_list_ptr->head, list) {
450 lock_session(session);
7a485870 451 if (session->kernel_session == NULL) {
b5541356 452 unlock_session(session);
7a485870
DG
453 continue;
454 }
455 nb_fd += session->kernel_session->channel_count;
b5541356 456 unlock_session(session);
7a485870
DG
457 }
458
459 DBG("Resizing kernel_pollfd to size %d", nb_fd);
460
461 kernel_pollfd = realloc(kernel_pollfd, nb_fd * sizeof(struct pollfd));
462 if (kernel_pollfd == NULL) {
463 perror("malloc kernel_pollfd");
464 goto error;
465 }
466
b5541356
DG
467 cds_list_for_each_entry(session, &session_list_ptr->head, list) {
468 lock_session(session);
7a485870 469 if (session->kernel_session == NULL) {
b5541356 470 unlock_session(session);
7a485870
DG
471 continue;
472 }
473 if (i >= nb_fd) {
474 ERR("To much channel for kernel_pollfd size");
b5541356 475 unlock_session(session);
7a485870
DG
476 break;
477 }
478 cds_list_for_each_entry(channel, &session->kernel_session->channel_list.head, list) {
479 kernel_pollfd[i].fd = channel->fd;
480 kernel_pollfd[i].events = POLLIN | POLLRDNORM;
481 i++;
482 }
b5541356 483 unlock_session(session);
7a485870 484 }
6c9cc2ab 485 unlock_session_list();
7a485870
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486
487 /* Adding wake up pipe */
273ea72c
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488 kernel_pollfd[nb_fd - 2].fd = kernel_poll_pipe[0];
489 kernel_pollfd[nb_fd - 2].events = POLLIN;
490
491 /* Adding the quit pipe */
492 kernel_pollfd[nb_fd - 1].fd = thread_quit_pipe[0];
7a485870
DG
493
494 return nb_fd;
495
496error:
6c9cc2ab 497 unlock_session_list();
7a485870
DG
498 return -1;
499}
500
501/*
d063d709
DG
502 * Find the channel fd from 'fd' over all tracing session. When found, check
503 * for new channel stream and send those stream fds to the kernel consumer.
7a485870 504 *
d063d709 505 * Useful for CPU hotplug feature.
7a485870
DG
506 */
507static int update_kernel_stream(int fd)
508{
509 int ret = 0;
510 struct ltt_session *session;
511 struct ltt_kernel_channel *channel;
512
513 DBG("Updating kernel streams for channel fd %d", fd);
514
6c9cc2ab 515 lock_session_list();
b5541356
DG
516 cds_list_for_each_entry(session, &session_list_ptr->head, list) {
517 lock_session(session);
7a485870 518 if (session->kernel_session == NULL) {
b5541356 519 unlock_session(session);
7a485870
DG
520 continue;
521 }
522 cds_list_for_each_entry(channel, &session->kernel_session->channel_list.head, list) {
523 if (channel->fd == fd) {
524 DBG("Channel found, updating kernel streams");
525 ret = kernel_open_channel_stream(channel);
526 if (ret < 0) {
527 goto end;
528 }
529 /*
530 * Have we already sent fds to the consumer? If yes, it means that
531 * tracing is started so it is safe to send our updated stream fds.
532 */
533 if (session->kernel_session->kconsumer_fds_sent == 1) {
534 ret = send_kconsumerd_channel_fds(kconsumerd_cmd_sock, channel);
535 if (ret < 0) {
536 goto end;
537 }
538 }
539 goto end;
540 }
541 }
b5541356 542 unlock_session(session);
7a485870
DG
543 }
544
545end:
6c9cc2ab 546 unlock_session_list();
b5541356
DG
547 if (session) {
548 unlock_session(session);
549 }
7a485870
DG
550 return ret;
551}
552
553/*
d063d709 554 * This thread manage event coming from the kernel.
7a485870 555 *
d063d709
DG
556 * Features supported in this thread:
557 * -) CPU Hotplug
7a485870
DG
558 */
559static void *thread_manage_kernel(void *data)
560{
561 int ret, i, nb_fd = 0;
562 char tmp;
563 int update_poll_flag = 1;
564
565 DBG("Thread manage kernel started");
566
567 while (1) {
568 if (update_poll_flag == 1) {
569 nb_fd = update_kernel_pollfd();
570 if (nb_fd < 0) {
571 goto error;
572 }
573 update_poll_flag = 0;
574 }
575
576 DBG("Polling on %d fds", nb_fd);
577
578 /* Poll infinite value of time */
579 ret = poll(kernel_pollfd, nb_fd, -1);
580 if (ret < 0) {
581 perror("poll kernel thread");
582 goto error;
583 } else if (ret == 0) {
584 /* Should not happen since timeout is infinite */
585 continue;
586 }
587
273ea72c
DG
588 /* Thread quit pipe has been closed. Killing thread. */
589 if (kernel_pollfd[nb_fd - 1].revents == POLLNVAL) {
590 goto error;
591 }
592
7a485870
DG
593 DBG("Kernel poll event triggered");
594
595 /*
596 * Check if the wake up pipe was triggered. If so, the kernel_pollfd
597 * must be updated.
598 */
273ea72c 599 switch (kernel_pollfd[nb_fd - 2].revents) {
b5541356 600 case POLLIN:
7a485870
DG
601 ret = read(kernel_poll_pipe[0], &tmp, 1);
602 update_poll_flag = 1;
603 continue;
b5541356
DG
604 case POLLERR:
605 goto error;
606 default:
607 break;
7a485870
DG
608 }
609
610 for (i = 0; i < nb_fd; i++) {
611 switch (kernel_pollfd[i].revents) {
612 /*
613 * New CPU detected by the kernel. Adding kernel stream to kernel
614 * session and updating the kernel consumer
615 */
616 case POLLIN | POLLRDNORM:
617 ret = update_kernel_stream(kernel_pollfd[i].fd);
618 if (ret < 0) {
619 continue;
620 }
621 break;
622 }
623 }
624 }
625
626error:
627 DBG("Kernel thread dying");
628 if (kernel_pollfd) {
629 free(kernel_pollfd);
630 }
273ea72c
DG
631
632 close(kernel_poll_pipe[0]);
633 close(kernel_poll_pipe[1]);
7a485870
DG
634 return NULL;
635}
636
1d4b027a 637/*
d063d709 638 * This thread manage the kconsumerd error sent back to the session daemon.
1d4b027a
DG
639 */
640static void *thread_manage_kconsumerd(void *data)
641{
273ea72c 642 int sock = 0, ret;
1d4b027a 643 enum lttcomm_return_code code;
273ea72c 644 struct pollfd pollfd[2];
1d4b027a
DG
645
646 DBG("[thread] Manage kconsumerd started");
647
648 ret = lttcomm_listen_unix_sock(kconsumerd_err_sock);
649 if (ret < 0) {
650 goto error;
651 }
652
273ea72c
DG
653 /* First fd is always the quit pipe */
654 pollfd[0].fd = thread_quit_pipe[0];
655
656 /* Apps socket */
657 pollfd[1].fd = kconsumerd_err_sock;
658 pollfd[1].events = POLLIN;
659
660 /* Inifinite blocking call, waiting for transmission */
661 ret = poll(pollfd, 2, -1);
662 if (ret < 0) {
663 perror("poll kconsumerd thread");
664 goto error;
665 }
666
667 /* Thread quit pipe has been closed. Killing thread. */
668 if (pollfd[0].revents == POLLNVAL) {
669 goto error;
670 } else if (pollfd[1].revents == POLLERR) {
671 ERR("Kconsumerd err socket poll error");
672 goto error;
673 }
674
1d4b027a
DG
675 sock = lttcomm_accept_unix_sock(kconsumerd_err_sock);
676 if (sock < 0) {
677 goto error;
678 }
679
712ea556 680 /* Getting status code from kconsumerd */
1d4b027a
DG
681 ret = lttcomm_recv_unix_sock(sock, &code, sizeof(enum lttcomm_return_code));
682 if (ret <= 0) {
683 goto error;
684 }
685
686 if (code == KCONSUMERD_COMMAND_SOCK_READY) {
687 kconsumerd_cmd_sock = lttcomm_connect_unix_sock(kconsumerd_cmd_unix_sock_path);
688 if (kconsumerd_cmd_sock < 0) {
712ea556 689 sem_post(&kconsumerd_sem);
1d4b027a
DG
690 perror("kconsumerd connect");
691 goto error;
692 }
693 /* Signal condition to tell that the kconsumerd is ready */
694 sem_post(&kconsumerd_sem);
695 DBG("Kconsumerd command socket ready");
696 } else {
6f61d021 697 DBG("Kconsumerd error when waiting for SOCK_READY : %s",
1d4b027a
DG
698 lttcomm_get_readable_code(-code));
699 goto error;
700 }
701
712ea556
DG
702 /* Wait for any kconsumerd error */
703 ret = lttcomm_recv_unix_sock(sock, &code, sizeof(enum lttcomm_return_code));
704 if (ret <= 0) {
705 ERR("Kconsumerd closed the command socket");
706 goto error;
6f61d021 707 }
1d4b027a 708
712ea556
DG
709 ERR("Kconsumerd return code : %s", lttcomm_get_readable_code(-code));
710
1d4b027a 711error:
6f61d021 712 DBG("Kconsumerd thread dying");
273ea72c
DG
713 if (kconsumerd_err_sock) {
714 close(kconsumerd_err_sock);
715 }
716 if (kconsumerd_cmd_sock) {
717 close(kconsumerd_cmd_sock);
718 }
719 if (sock) {
720 close(sock);
721 }
722
723 unlink(kconsumerd_err_unix_sock_path);
724 unlink(kconsumerd_cmd_unix_sock_path);
725
726 kconsumerd_pid = 0;
1d4b027a
DG
727 return NULL;
728}
729
730/*
1d4b027a
DG
731 * This thread manage the application socket communication
732 */
733static void *thread_manage_apps(void *data)
734{
273ea72c
DG
735 int sock = 0, ret;
736 struct pollfd pollfd[2];
1d4b027a
DG
737
738 /* TODO: Something more elegant is needed but fine for now */
739 /* FIXME: change all types to either uint8_t, uint32_t, uint64_t
740 * for 32-bit vs 64-bit compat processes. */
741 /* replicate in ust with version number */
742 struct {
743 int reg; /* 1:register, 0:unregister */
744 pid_t pid;
745 uid_t uid;
746 } reg_msg;
747
748 DBG("[thread] Manage apps started");
749
750 ret = lttcomm_listen_unix_sock(apps_sock);
751 if (ret < 0) {
752 goto error;
753 }
754
273ea72c
DG
755 /* First fd is always the quit pipe */
756 pollfd[0].fd = thread_quit_pipe[0];
757
758 /* Apps socket */
759 pollfd[1].fd = apps_sock;
760 pollfd[1].events = POLLIN;
761
1d4b027a
DG
762 /* Notify all applications to register */
763 notify_apps(default_global_apps_pipe);
764
765 while (1) {
766 DBG("Accepting application registration");
273ea72c
DG
767
768 /* Inifinite blocking call, waiting for transmission */
769 ret = poll(pollfd, 2, -1);
770 if (ret < 0) {
771 perror("poll apps thread");
772 goto error;
773 }
774
775 /* Thread quit pipe has been closed. Killing thread. */
776 if (pollfd[0].revents == POLLNVAL) {
777 goto error;
778 } else if (pollfd[1].revents == POLLERR) {
779 ERR("Apps socket poll error");
780 goto error;
781 }
782
1d4b027a
DG
783 sock = lttcomm_accept_unix_sock(apps_sock);
784 if (sock < 0) {
785 goto error;
786 }
787
273ea72c
DG
788 /*
789 * Basic recv here to handle the very simple data
1d4b027a
DG
790 * that the libust send to register (reg_msg).
791 */
792 ret = recv(sock, &reg_msg, sizeof(reg_msg), 0);
793 if (ret < 0) {
794 perror("recv");
795 continue;
796 }
797
798 /* Add application to the global traceable list */
799 if (reg_msg.reg == 1) {
800 /* Registering */
801 ret = register_traceable_app(reg_msg.pid, reg_msg.uid);
802 if (ret < 0) {
803 /* register_traceable_app only return an error with
804 * ENOMEM. At this point, we better stop everything.
805 */
806 goto error;
807 }
808 } else {
809 /* Unregistering */
810 unregister_traceable_app(reg_msg.pid);
811 }
812 }
813
814error:
273ea72c
DG
815 DBG("Apps thread dying");
816 if (apps_sock) {
817 close(apps_sock);
818 }
819 if (sock) {
820 close(sock);
821 }
1d4b027a 822
273ea72c 823 unlink(apps_unix_sock_path);
1d4b027a
DG
824 return NULL;
825}
826
8c0faa1d 827/*
d063d709
DG
828 * Start the thread_manage_kconsumerd. This must be done after a kconsumerd
829 * exec or it will fails.
8c0faa1d 830 */
693bd40b 831static int spawn_kconsumerd_thread(void)
8c0faa1d
DG
832{
833 int ret;
834
835 /* Setup semaphore */
836 sem_init(&kconsumerd_sem, 0, 0);
837
1d4b027a 838 ret = pthread_create(&kconsumerd_thread, NULL, thread_manage_kconsumerd, (void *) NULL);
8c0faa1d
DG
839 if (ret != 0) {
840 perror("pthread_create kconsumerd");
841 goto error;
842 }
843
693bd40b 844 /* Wait for the kconsumerd thread to be ready */
8c0faa1d
DG
845 sem_wait(&kconsumerd_sem);
846
712ea556
DG
847 if (kconsumerd_pid == 0) {
848 ERR("Kconsumerd did not start");
849 goto error;
850 }
851
8c0faa1d
DG
852 return 0;
853
854error:
712ea556 855 ret = LTTCOMM_KERN_CONSUMER_FAIL;
8c0faa1d
DG
856 return ret;
857}
858
859/*
d063d709 860 * Fork and exec a kernel consumer daemon (kconsumerd).
8c0faa1d 861 *
d063d709 862 * Return pid if successful else -1.
8c0faa1d 863 */
693bd40b 864static pid_t spawn_kconsumerd(void)
8c0faa1d
DG
865{
866 int ret;
867 pid_t pid;
53086306 868 const char *verbosity;
8c0faa1d 869
c49dc785
DG
870 DBG("Spawning kconsumerd");
871
8c0faa1d
DG
872 pid = fork();
873 if (pid == 0) {
874 /*
875 * Exec kconsumerd.
876 */
53086306
DG
877 if (opt_verbose > 1) {
878 verbosity = "--verbose";
879 } else {
880 verbosity = "--quiet";
881 }
882 execl(INSTALL_BIN_PATH "/ltt-kconsumerd", "ltt-kconsumerd", verbosity, NULL);
8c0faa1d
DG
883 if (errno != 0) {
884 perror("kernel start consumer exec");
885 }
886 exit(EXIT_FAILURE);
887 } else if (pid > 0) {
888 ret = pid;
889 goto error;
890 } else {
891 perror("kernel start consumer fork");
892 ret = -errno;
893 goto error;
894 }
895
896error:
897 return ret;
898}
899
693bd40b 900/*
d063d709 901 * Spawn the kconsumerd daemon and session daemon thread.
693bd40b
DG
902 */
903static int start_kconsumerd(void)
904{
905 int ret;
906
693bd40b 907 pthread_mutex_lock(&kconsumerd_pid_mutex);
c49dc785 908 if (kconsumerd_pid != 0) {
817153bb 909 pthread_mutex_unlock(&kconsumerd_pid_mutex);
c49dc785
DG
910 goto end;
911 }
693bd40b 912
c49dc785
DG
913 ret = spawn_kconsumerd();
914 if (ret < 0) {
915 ERR("Spawning kconsumerd failed");
916 ret = LTTCOMM_KERN_CONSUMER_FAIL;
917 pthread_mutex_unlock(&kconsumerd_pid_mutex);
918 goto error;
693bd40b 919 }
c49dc785
DG
920
921 /* Setting up the global kconsumerd_pid */
922 kconsumerd_pid = ret;
693bd40b
DG
923 pthread_mutex_unlock(&kconsumerd_pid_mutex);
924
6f61d021
DG
925 DBG("Kconsumerd pid %d", ret);
926
693bd40b 927 DBG("Spawning kconsumerd thread");
693bd40b
DG
928 ret = spawn_kconsumerd_thread();
929 if (ret < 0) {
930 ERR("Fatal error spawning kconsumerd thread");
693bd40b
DG
931 goto error;
932 }
933
c49dc785 934end:
693bd40b
DG
935 return 0;
936
937error:
938 return ret;
939}
940
b73401da 941/*
d063d709 942 * modprobe_kernel_modules
b73401da
DG
943 */
944static int modprobe_kernel_modules(void)
945{
946 int ret = 0, i = 0;
947 char modprobe[256];
948
949 while (kernel_modules_list[i] != NULL) {
950 ret = snprintf(modprobe, sizeof(modprobe), "/sbin/modprobe %s",
951 kernel_modules_list[i]);
952 if (ret < 0) {
953 perror("snprintf modprobe");
954 goto error;
955 }
956 ret = system(modprobe);
957 if (ret < 0) {
958 ERR("Unable to load module %s", kernel_modules_list[i]);
959 }
960 DBG("Modprobe successfully %s", kernel_modules_list[i]);
961 i++;
962 }
963
964error:
965 return ret;
966}
967
968/*
d063d709 969 * mount_debugfs
b73401da
DG
970 */
971static int mount_debugfs(char *path)
972{
973 int ret;
974 char *type = "debugfs";
975
976 ret = mkdir_recursive(path, S_IRWXU | S_IRWXG);
977 if (ret < 0) {
978 goto error;
979 }
980
981 ret = mount(type, path, type, 0, NULL);
982 if (ret < 0) {
983 perror("mount debugfs");
984 goto error;
985 }
986
987 DBG("Mounted debugfs successfully at %s", path);
988
989error:
990 return ret;
991}
992
8c0faa1d 993/*
d063d709 994 * Setup necessary data for kernel tracer action.
8c0faa1d 995 */
f3ed775e 996static void init_kernel_tracer(void)
8c0faa1d 997{
b73401da
DG
998 int ret;
999 char *proc_mounts = "/proc/mounts";
1000 char line[256];
1001 char *debugfs_path = NULL, *lttng_path;
1002 FILE *fp;
1003
1004 /* Detect debugfs */
1005 fp = fopen(proc_mounts, "r");
1006 if (fp == NULL) {
1007 ERR("Unable to probe %s", proc_mounts);
1008 goto error;
1009 }
1010
1011 while (fgets(line, sizeof(line), fp) != NULL) {
1012 if (strstr(line, "debugfs") != NULL) {
1013 /* Remove first string */
1014 strtok(line, " ");
1015 /* Dup string here so we can reuse line later on */
1016 debugfs_path = strdup(strtok(NULL, " "));
1017 DBG("Got debugfs path : %s", debugfs_path);
1018 break;
1019 }
1020 }
1021
1022 fclose(fp);
1023
1024 /* Mount debugfs if needded */
1025 if (debugfs_path == NULL) {
1026 ret = asprintf(&debugfs_path, "/mnt/debugfs");
1027 if (ret < 0) {
1028 perror("asprintf debugfs path");
1029 goto error;
1030 }
1031 ret = mount_debugfs(debugfs_path);
1032 if (ret < 0) {
1033 goto error;
1034 }
1035 }
1036
1037 /* Modprobe lttng kernel modules */
1038 ret = modprobe_kernel_modules();
1039 if (ret < 0) {
1040 goto error;
1041 }
1042
1043 /* Setup lttng kernel path */
1044 ret = asprintf(&lttng_path, "%s/lttng", debugfs_path);
1045 if (ret < 0) {
1046 perror("asprintf lttng path");
1047 goto error;
1048 }
1049
1050 /* Open debugfs lttng */
1051 kernel_tracer_fd = open(lttng_path, O_RDWR);
f3ed775e 1052 if (kernel_tracer_fd < 0) {
b73401da
DG
1053 DBG("Failed to open %s", lttng_path);
1054 goto error;
8c0faa1d
DG
1055 }
1056
b73401da
DG
1057 free(lttng_path);
1058 free(debugfs_path);
f3ed775e 1059 DBG("Kernel tracer fd %d", kernel_tracer_fd);
b73401da
DG
1060 return;
1061
1062error:
1063 if (lttng_path) {
1064 free(lttng_path);
1065 }
1066 if (debugfs_path) {
1067 free(debugfs_path);
1068 }
1069 WARN("No kernel tracer available");
1070 kernel_tracer_fd = 0;
1071 return;
f3ed775e 1072}
33a2b854 1073
f3ed775e 1074/*
d063d709
DG
1075 * Start tracing by creating trace directory and sending FDs to the kernel
1076 * consumer.
f3ed775e
DG
1077 */
1078static int start_kernel_trace(struct ltt_kernel_session *session)
1079{
f40799e8 1080 int ret = 0;
8c0faa1d 1081
f3ed775e
DG
1082 if (session->kconsumer_fds_sent == 0) {
1083 ret = send_kconsumerd_fds(kconsumerd_cmd_sock, session);
1084 if (ret < 0) {
1085 ERR("Send kconsumerd fds failed");
1086 ret = LTTCOMM_KERN_CONSUMER_FAIL;
1087 goto error;
1088 }
1d4b027a 1089
f3ed775e
DG
1090 session->kconsumer_fds_sent = 1;
1091 }
1d4b027a
DG
1092
1093error:
1094 return ret;
8c0faa1d
DG
1095}
1096
7a485870
DG
1097/*
1098 * Notify kernel thread to update it's pollfd.
1099 */
1100static int notify_kernel_pollfd(void)
1101{
1102 int ret;
1103
1104 /* Inform kernel thread of the new kernel channel */
1105 ret = write(kernel_poll_pipe[1], "!", 1);
1106 if (ret < 0) {
1107 perror("write kernel poll pipe");
1108 }
1109
1110 return ret;
1111}
1112
8c0faa1d 1113/*
d063d709 1114 * Allocate a channel structure and fill it.
8c0faa1d 1115 */
ed8f384d 1116static struct lttng_channel *init_default_channel(char *name)
8c0faa1d 1117{
f3ed775e 1118 struct lttng_channel *chan;
1d4b027a 1119
f3ed775e
DG
1120 chan = malloc(sizeof(struct lttng_channel));
1121 if (chan == NULL) {
1122 perror("init channel malloc");
1123 goto error;
8c0faa1d 1124 }
1d4b027a 1125
ed8f384d 1126 if (snprintf(chan->name, NAME_MAX, "%s", name) < 0) {
f3ed775e
DG
1127 perror("snprintf defautl channel name");
1128 return NULL;
1129 }
1130
1131 chan->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE;
1132 chan->attr.subbuf_size = DEFAULT_CHANNEL_SUBBUF_SIZE;
1133 chan->attr.num_subbuf = DEFAULT_CHANNEL_SUBBUF_NUM;
1134 chan->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
1135 chan->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;
7d452e12 1136 chan->attr.output = DEFAULT_KERNEL_CHANNEL_OUTPUT;
1d4b027a
DG
1137
1138error:
f3ed775e 1139 return chan;
8c0faa1d
DG
1140}
1141
333f285e 1142/*
d063d709 1143 * Create a kernel tracer session then create the default channel.
333f285e 1144 */
f3ed775e 1145static int create_kernel_session(struct ltt_session *session)
333f285e 1146{
f3ed775e 1147 int ret;
f3ed775e
DG
1148
1149 DBG("Creating kernel session");
1150
1151 ret = kernel_create_session(session, kernel_tracer_fd);
1152 if (ret < 0) {
1153 ret = LTTCOMM_KERN_SESS_FAIL;
1154 goto error;
333f285e
DG
1155 }
1156
7a485870
DG
1157 ret = mkdir_recursive(session->path, S_IRWXU | S_IRWXG );
1158 if (ret < 0) {
1159 if (ret != EEXIST) {
1160 ERR("Trace directory creation error");
1161 goto error;
1162 }
1163 }
1164
f3ed775e
DG
1165error:
1166 return ret;
333f285e
DG
1167}
1168
6c9cc2ab
DG
1169/*
1170 * Using the session list, filled a lttng_session array to send back to the
1171 * client for session listing.
1172 *
1173 * The session list lock MUST be acquired before calling this function. Use
1174 * lock_session_list() and unlock_session_list().
1175 */
1176static void list_lttng_sessions(struct lttng_session *sessions)
1177{
1178 int i = 0;
1179 struct ltt_session *session;
1180
1181 DBG("Getting all available session");
1182 /*
1183 * Iterate over session list and append data after the control struct in
1184 * the buffer.
1185 */
1186 cds_list_for_each_entry(session, &session_list_ptr->head, list) {
1187 strncpy(sessions[i].path, session->path, PATH_MAX);
1188 strncpy(sessions[i].name, session->name, NAME_MAX);
1189 i++;
1190 }
1191}
1192
fac6795d 1193/*
d063d709
DG
1194 * Process the command requested by the lttng client within the command
1195 * context structure. This function make sure that the return structure (llm)
1196 * is set and ready for transmission before returning.
fac6795d 1197 *
e065084a 1198 * Return any error encountered or 0 for success.
fac6795d 1199 */
5461b305 1200static int process_client_msg(struct command_ctx *cmd_ctx)
fac6795d 1201{
f40799e8 1202 int ret = LTTCOMM_OK;
fac6795d 1203
5461b305 1204 DBG("Processing client command %d", cmd_ctx->lsm->cmd_type);
fac6795d 1205
f3ed775e 1206 /* Listing commands don't need a session */
5461b305 1207 switch (cmd_ctx->lsm->cmd_type) {
5e16da05
MD
1208 case LTTNG_CREATE_SESSION:
1209 case LTTNG_LIST_SESSIONS:
f3ed775e
DG
1210 case LTTNG_LIST_EVENTS:
1211 case LTTNG_KERNEL_LIST_EVENTS:
1212 case LTTNG_LIST_TRACEABLE_APPS:
5e16da05
MD
1213 break;
1214 default:
f3ed775e
DG
1215 DBG("Getting session %s by name", cmd_ctx->lsm->session_name);
1216 cmd_ctx->session = find_session_by_name(cmd_ctx->lsm->session_name);
5461b305 1217 if (cmd_ctx->session == NULL) {
f3ed775e
DG
1218 /* If session name not found */
1219 if (cmd_ctx->lsm->session_name != NULL) {
1220 ret = LTTCOMM_SESS_NOT_FOUND;
1221 } else { /* If no session name specified */
1222 ret = LTTCOMM_SELECT_SESS;
1223 }
5461b305 1224 goto error;
b5541356
DG
1225 } else {
1226 /* Acquire lock for the session */
1227 lock_session(cmd_ctx->session);
379473d2 1228 }
5e16da05 1229 break;
379473d2
DG
1230 }
1231
f3ed775e
DG
1232 /*
1233 * Check kernel command for kernel session.
1234 */
20fe2104 1235 switch (cmd_ctx->lsm->cmd_type) {
d65106b1 1236 case LTTNG_KERNEL_ADD_CONTEXT:
f3ed775e
DG
1237 case LTTNG_KERNEL_DISABLE_ALL_EVENT:
1238 case LTTNG_KERNEL_DISABLE_CHANNEL:
1239 case LTTNG_KERNEL_DISABLE_EVENT:
1240 case LTTNG_KERNEL_ENABLE_ALL_EVENT:
1241 case LTTNG_KERNEL_ENABLE_CHANNEL:
1242 case LTTNG_KERNEL_ENABLE_EVENT:
1243 case LTTNG_KERNEL_LIST_EVENTS:
333f285e 1244 /* Kernel tracer check */
20fe2104 1245 if (kernel_tracer_fd == 0) {
333f285e
DG
1246 init_kernel_tracer();
1247 if (kernel_tracer_fd == 0) {
1248 ret = LTTCOMM_KERN_NA;
1249 goto error;
1250 }
20fe2104 1251 }
f3ed775e
DG
1252
1253 /* Need a session for kernel command */
1254 if (cmd_ctx->lsm->cmd_type != LTTNG_KERNEL_LIST_EVENTS &&
1255 cmd_ctx->session->kernel_session == NULL) {
7b395890 1256
f3ed775e
DG
1257 ret = create_kernel_session(cmd_ctx->session);
1258 if (ret < 0) {
1259 ret = LTTCOMM_KERN_SESS_FAIL;
1260 goto error;
1261 }
1262
7b395890 1263 /* Start the kernel consumer daemon */
f3ed775e
DG
1264 if (kconsumerd_pid == 0) {
1265 ret = start_kconsumerd();
1266 if (ret < 0) {
1267 goto error;
1268 }
1269 }
1270 }
20fe2104
DG
1271 }
1272
97b1a726 1273#ifdef DISABLED
471d1693 1274 /* Connect to ust apps if available pid */
5461b305 1275 if (cmd_ctx->lsm->pid > 0) {
471d1693 1276 /* Connect to app using ustctl API */
5461b305
DG
1277 cmd_ctx->ust_sock = ust_connect_app(cmd_ctx->lsm->pid);
1278 if (cmd_ctx->ust_sock < 0) {
471d1693 1279 ret = LTTCOMM_NO_TRACEABLE;
5461b305 1280 goto error;
471d1693
DG
1281 }
1282 }
97b1a726 1283#endif /* DISABLED */
471d1693 1284
fac6795d 1285 /* Process by command type */
5461b305 1286 switch (cmd_ctx->lsm->cmd_type) {
d65106b1
DG
1287 case LTTNG_KERNEL_ADD_CONTEXT:
1288 {
1289 int found = 0, no_event = 0;
1290 struct ltt_kernel_channel *chan;
1291 struct ltt_kernel_event *event;
7d29a247 1292 struct lttng_kernel_context ctx;
d65106b1
DG
1293
1294 /* Setup lttng message with no payload */
1295 ret = setup_lttng_msg(cmd_ctx, 0);
1296 if (ret < 0) {
1297 goto setup_error;
1298 }
1299
1300 /* Check if event name is given */
1301 if (strlen(cmd_ctx->lsm->u.context.event_name) == 0) {
1302 no_event = 1;
1303 }
1304
7d29a247
DG
1305 /* Create Kernel context */
1306 ctx.ctx = cmd_ctx->lsm->u.context.ctx.ctx;
1307 ctx.u.perf_counter.type = cmd_ctx->lsm->u.context.ctx.u.perf_counter.type;
1308 ctx.u.perf_counter.config = cmd_ctx->lsm->u.context.ctx.u.perf_counter.config;
1309 strncpy(ctx.u.perf_counter.name,
1310 cmd_ctx->lsm->u.context.ctx.u.perf_counter.name,
1311 sizeof(ctx.u.perf_counter.name));
1312
d65106b1
DG
1313 if (strlen(cmd_ctx->lsm->u.context.channel_name) == 0) {
1314 /* Go over all channels */
1315 DBG("Adding context to all channels");
1316 cds_list_for_each_entry(chan,
1317 &cmd_ctx->session->kernel_session->channel_list.head, list) {
1318 if (no_event) {
7d29a247 1319 ret = kernel_add_channel_context(chan, &ctx);
d65106b1 1320 if (ret < 0) {
d7b91b3c
DG
1321 ret = LTTCOMM_KERN_CONTEXT_FAIL;
1322 goto error;
d65106b1
DG
1323 }
1324 } else {
1325 event = get_kernel_event_by_name(cmd_ctx->lsm->u.context.event_name, chan);
1326 if (event != NULL) {
7d29a247 1327 ret = kernel_add_event_context(event, &ctx);
d65106b1
DG
1328 if (ret < 0) {
1329 ret = LTTCOMM_KERN_CONTEXT_FAIL;
1330 goto error;
1331 }
1332 found = 1;
1333 break;
1334 }
1335 }
1336 }
1337 } else {
1338 chan = get_kernel_channel_by_name(cmd_ctx->lsm->u.context.channel_name,
1339 cmd_ctx->session->kernel_session);
1340 if (chan == NULL) {
1341 ret = LTTCOMM_KERN_CHAN_NOT_FOUND;
1342 goto error;
1343 }
1344
1345 if (no_event) {
7d29a247 1346 ret = kernel_add_channel_context(chan, &ctx);
d65106b1
DG
1347 if (ret < 0) {
1348 ret = LTTCOMM_KERN_CONTEXT_FAIL;
1349 goto error;
1350 }
1351 } else {
1352 event = get_kernel_event_by_name(cmd_ctx->lsm->u.context.event_name, chan);
1353 if (event != NULL) {
7d29a247 1354 ret = kernel_add_event_context(event, &ctx);
d65106b1
DG
1355 if (ret < 0) {
1356 ret = LTTCOMM_KERN_CONTEXT_FAIL;
1357 goto error;
1358 }
1359 }
1360 }
1361 }
1362
1363 if (!found && !no_event) {
1364 ret = LTTCOMM_NO_EVENT;
1365 goto error;
1366 }
1367
1368 ret = LTTCOMM_OK;
1369 break;
1370 }
26cc6b4e
DG
1371 case LTTNG_KERNEL_DISABLE_CHANNEL:
1372 {
1373 struct ltt_kernel_channel *chan;
1374
1375 /* Setup lttng message with no payload */
1376 ret = setup_lttng_msg(cmd_ctx, 0);
1377 if (ret < 0) {
1378 goto setup_error;
1379 }
1380
1381 chan = get_kernel_channel_by_name(cmd_ctx->lsm->u.disable.channel_name,
1382 cmd_ctx->session->kernel_session);
1383 if (chan == NULL) {
1384 ret = LTTCOMM_KERN_CHAN_NOT_FOUND;
1385 goto error;
1386 } else if (chan->enabled == 1) {
1387 ret = kernel_disable_channel(chan);
1388 if (ret < 0) {
1389 if (ret != EEXIST) {
1390 ret = LTTCOMM_KERN_CHAN_DISABLE_FAIL;
1391 }
1392 goto error;
1393 }
1394 }
1395
1396 kernel_wait_quiescent(kernel_tracer_fd);
1397 ret = LTTCOMM_OK;
1398 break;
1399 }
e953ef25
DG
1400 case LTTNG_KERNEL_DISABLE_EVENT:
1401 {
e953ef25 1402 struct ltt_kernel_channel *chan;
19e70852 1403 struct ltt_kernel_event *ev;
e953ef25
DG
1404
1405 /* Setup lttng message with no payload */
1406 ret = setup_lttng_msg(cmd_ctx, 0);
1407 if (ret < 0) {
1408 goto setup_error;
1409 }
1410
19e70852
DG
1411 chan = get_kernel_channel_by_name(cmd_ctx->lsm->u.disable.channel_name,
1412 cmd_ctx->session->kernel_session);
1413 if (chan == NULL) {
1414 ret = LTTCOMM_KERN_CHAN_NOT_FOUND;
1415 goto error;
1416 }
e953ef25 1417
19e70852
DG
1418 ev = get_kernel_event_by_name(cmd_ctx->lsm->u.disable.name, chan);
1419 if (ev != NULL) {
1420 DBG("Disabling kernel event %s for channel %s.",
1421 cmd_ctx->lsm->u.disable.name, cmd_ctx->lsm->u.disable.channel_name);
1422 ret = kernel_disable_event(ev);
1423 if (ret < 0) {
1424 ret = LTTCOMM_KERN_ENABLE_FAIL;
1425 goto error;
e953ef25
DG
1426 }
1427 }
1428
19e70852
DG
1429 kernel_wait_quiescent(kernel_tracer_fd);
1430 ret = LTTCOMM_OK;
e953ef25
DG
1431 break;
1432 }
950131af
DG
1433 case LTTNG_KERNEL_DISABLE_ALL_EVENT:
1434 {
1435 struct ltt_kernel_channel *chan;
1436 struct ltt_kernel_event *ev;
1437
1438 /* Setup lttng message with no payload */
1439 ret = setup_lttng_msg(cmd_ctx, 0);
1440 if (ret < 0) {
1441 goto setup_error;
1442 }
1443
1444 DBG("Disabling all enabled kernel events");
1445
1446 chan = get_kernel_channel_by_name(cmd_ctx->lsm->u.disable.channel_name,
1447 cmd_ctx->session->kernel_session);
1448 if (chan == NULL) {
1449 ret = LTTCOMM_KERN_CHAN_NOT_FOUND;
1450 goto error;
1451 }
1452
1453 /* For each event in the kernel session */
1454 cds_list_for_each_entry(ev, &chan->events_list.head, list) {
1455 DBG("Disabling kernel event %s for channel %s.",
1456 ev->event->name, cmd_ctx->lsm->u.disable.channel_name);
1457 ret = kernel_disable_event(ev);
1458 if (ret < 0) {
1459 continue;
1460 }
1461 }
1462
1463 /* Quiescent wait after event disable */
1464 kernel_wait_quiescent(kernel_tracer_fd);
1465 ret = LTTCOMM_OK;
1466 break;
1467 }
d36b8583
DG
1468 case LTTNG_KERNEL_ENABLE_CHANNEL:
1469 {
1470 struct ltt_kernel_channel *chan;
1471
1472 /* Setup lttng message with no payload */
1473 ret = setup_lttng_msg(cmd_ctx, 0);
1474 if (ret < 0) {
1475 goto setup_error;
1476 }
1477
1478 chan = get_kernel_channel_by_name(cmd_ctx->lsm->u.enable.channel_name,
1479 cmd_ctx->session->kernel_session);
1480 if (chan == NULL) {
7d29a247
DG
1481 /* Channel not found, creating it */
1482 DBG("Creating kernel channel");
1483
1484 ret = kernel_create_channel(cmd_ctx->session->kernel_session,
1485 &cmd_ctx->lsm->u.channel.chan, cmd_ctx->session->path);
1486 if (ret < 0) {
1487 ret = LTTCOMM_KERN_CHAN_FAIL;
1488 goto error;
1489 }
1490
1491 /* Notify kernel thread that there is a new channel */
1492 ret = notify_kernel_pollfd();
1493 if (ret < 0) {
1494 ret = LTTCOMM_FATAL;
1495 goto error;
1496 }
d36b8583
DG
1497 } else if (chan->enabled == 0) {
1498 ret = kernel_enable_channel(chan);
1499 if (ret < 0) {
1500 if (ret != EEXIST) {
1501 ret = LTTCOMM_KERN_CHAN_ENABLE_FAIL;
1502 }
1503 goto error;
1504 }
1505 }
1506
1507 kernel_wait_quiescent(kernel_tracer_fd);
1508 ret = LTTCOMM_OK;
1509 break;
1510 }
f3ed775e 1511 case LTTNG_KERNEL_ENABLE_EVENT:
894be886 1512 {
7d29a247
DG
1513 char *channel_name;
1514 struct ltt_kernel_channel *kchan;
19e70852 1515 struct ltt_kernel_event *ev;
7d29a247 1516 struct lttng_channel *chan;
f3ed775e 1517
894be886
DG
1518 /* Setup lttng message with no payload */
1519 ret = setup_lttng_msg(cmd_ctx, 0);
1520 if (ret < 0) {
1521 goto setup_error;
1522 }
1523
7d29a247
DG
1524 channel_name = cmd_ctx->lsm->u.enable.channel_name;
1525
1526 do {
1527 kchan = get_kernel_channel_by_name(channel_name,
1528 cmd_ctx->session->kernel_session);
1529 if (kchan == NULL) {
ed8f384d 1530 DBG("Channel not found. Creating channel %s", channel_name);
7d29a247 1531
ed8f384d 1532 chan = init_default_channel(channel_name);
7d29a247
DG
1533 if (chan == NULL) {
1534 ret = LTTCOMM_FATAL;
1535 goto error;
1536 }
1537
1538 ret = kernel_create_channel(cmd_ctx->session->kernel_session,
1539 chan, cmd_ctx->session->path);
1540 if (ret < 0) {
1541 ret = LTTCOMM_KERN_CHAN_FAIL;
1542 goto error;
1543 }
1544 }
1545 } while (kchan == NULL);
f34daff7 1546
7d29a247 1547 ev = get_kernel_event_by_name(cmd_ctx->lsm->u.enable.event.name, kchan);
19e70852
DG
1548 if (ev == NULL) {
1549 DBG("Creating kernel event %s for channel %s.",
7d29a247
DG
1550 cmd_ctx->lsm->u.enable.event.name, channel_name);
1551 ret = kernel_create_event(&cmd_ctx->lsm->u.enable.event, kchan);
f3ed775e 1552 } else {
19e70852 1553 DBG("Enabling kernel event %s for channel %s.",
7d29a247 1554 cmd_ctx->lsm->u.enable.event.name, channel_name);
19e70852 1555 ret = kernel_enable_event(ev);
7d29a247
DG
1556 if (ret == -EEXIST) {
1557 ret = LTTCOMM_KERN_EVENT_EXIST;
1558 goto error;
1559 }
19e70852
DG
1560 }
1561
1562 if (ret < 0) {
1563 ret = LTTCOMM_KERN_ENABLE_FAIL;
1564 goto error;
f3ed775e 1565 }
19e70852
DG
1566
1567 kernel_wait_quiescent(kernel_tracer_fd);
1568 ret = LTTCOMM_OK;
894be886
DG
1569 break;
1570 }
f3ed775e 1571 case LTTNG_KERNEL_ENABLE_ALL_EVENT:
33a2b854 1572 {
950131af 1573 int pos, size;
7d29a247
DG
1574 char *event_list, *event, *ptr, *channel_name;
1575 struct ltt_kernel_channel *kchan;
950131af
DG
1576 struct ltt_kernel_event *ev;
1577 struct lttng_event ev_attr;
7d29a247 1578 struct lttng_channel *chan;
33a2b854
DG
1579
1580 /* Setup lttng message with no payload */
1581 ret = setup_lttng_msg(cmd_ctx, 0);
1582 if (ret < 0) {
1583 goto setup_error;
1584 }
1585
1586 DBG("Enabling all kernel event");
1587
7d29a247
DG
1588 channel_name = cmd_ctx->lsm->u.enable.channel_name;
1589
1590 do {
1591 kchan = get_kernel_channel_by_name(channel_name,
1592 cmd_ctx->session->kernel_session);
1593 if (kchan == NULL) {
ed8f384d 1594 DBG("Channel not found. Creating channel %s", channel_name);
7d29a247 1595
ed8f384d 1596 chan = init_default_channel(channel_name);
7d29a247
DG
1597 if (chan == NULL) {
1598 ret = LTTCOMM_FATAL;
1599 goto error;
1600 }
1601
1602 ret = kernel_create_channel(cmd_ctx->session->kernel_session,
0c11f72b 1603 chan, cmd_ctx->session->path);
7d29a247
DG
1604 if (ret < 0) {
1605 ret = LTTCOMM_KERN_CHAN_FAIL;
1606 goto error;
1607 }
1608 }
1609 } while (kchan == NULL);
33a2b854 1610
950131af 1611 /* For each event in the kernel session */
7d29a247 1612 cds_list_for_each_entry(ev, &kchan->events_list.head, list) {
950131af 1613 DBG("Enabling kernel event %s for channel %s.",
7d29a247 1614 ev->event->name, channel_name);
950131af
DG
1615 ret = kernel_enable_event(ev);
1616 if (ret < 0) {
1617 continue;
f3ed775e
DG
1618 }
1619 }
1620
950131af
DG
1621 size = kernel_list_events(kernel_tracer_fd, &event_list);
1622 if (size < 0) {
1623 ret = LTTCOMM_KERN_LIST_FAIL;
f3ed775e
DG
1624 goto error;
1625 }
1626
33a2b854
DG
1627 ptr = event_list;
1628 while ((size = sscanf(ptr, "event { name = %m[^;]; };%n\n", &event, &pos)) == 1) {
7d29a247 1629 ev = get_kernel_event_by_name(event, kchan);
950131af
DG
1630 if (ev == NULL) {
1631 strncpy(ev_attr.name, event, LTTNG_SYM_NAME_LEN);
1632 /* Default event type for enable all */
e6ddca71 1633 ev_attr.type = LTTNG_EVENT_TRACEPOINT;
950131af 1634 /* Enable each single tracepoint event */
7d29a247 1635 ret = kernel_create_event(&ev_attr, kchan);
950131af
DG
1636 if (ret < 0) {
1637 /* Ignore error here and continue */
950131af 1638 }
33a2b854 1639 }
950131af 1640
33a2b854
DG
1641 /* Move pointer to the next line */
1642 ptr += pos + 1;
1643 free(event);
1644 }
1645
1646 free(event_list);
1647
f3ed775e
DG
1648 /* Quiescent wait after event enable */
1649 kernel_wait_quiescent(kernel_tracer_fd);
33a2b854
DG
1650 ret = LTTCOMM_OK;
1651 break;
1652 }
f3ed775e 1653 case LTTNG_KERNEL_LIST_EVENTS:
2ef84c95
DG
1654 {
1655 char *event_list;
f3ed775e
DG
1656 ssize_t size = 0;
1657
1658 DBG("Listing kernel events");
2ef84c95
DG
1659
1660 size = kernel_list_events(kernel_tracer_fd, &event_list);
1661 if (size < 0) {
1662 ret = LTTCOMM_KERN_LIST_FAIL;
1663 goto error;
1664 }
1665
1666 /*
1667 * Setup lttng message with payload size set to the event list size in
1668 * bytes and then copy list into the llm payload.
1669 */
1670 ret = setup_lttng_msg(cmd_ctx, size);
1671 if (ret < 0) {
1672 goto setup_error;
1673 }
1674
1675 /* Copy event list into message payload */
1676 memcpy(cmd_ctx->llm->payload, event_list, size);
1677
1678 free(event_list);
1679
1680 ret = LTTCOMM_OK;
1681 break;
1682 }
f3ed775e 1683 case LTTNG_START_TRACE:
8c0faa1d
DG
1684 {
1685 struct ltt_kernel_channel *chan;
f3ed775e 1686
8c0faa1d
DG
1687 /* Setup lttng message with no payload */
1688 ret = setup_lttng_msg(cmd_ctx, 0);
1689 if (ret < 0) {
1690 goto setup_error;
1691 }
1692
f3ed775e
DG
1693 /* Kernel tracing */
1694 if (cmd_ctx->session->kernel_session != NULL) {
1695 if (cmd_ctx->session->kernel_session->metadata == NULL) {
1696 DBG("Open kernel metadata");
58a97671
DG
1697 ret = kernel_open_metadata(cmd_ctx->session->kernel_session,
1698 cmd_ctx->session->path);
f3ed775e
DG
1699 if (ret < 0) {
1700 ret = LTTCOMM_KERN_META_FAIL;
1701 goto error;
1702 }
1703 }
8c0faa1d 1704
f3ed775e
DG
1705 if (cmd_ctx->session->kernel_session->metadata_stream_fd == 0) {
1706 DBG("Opening kernel metadata stream");
1707 if (cmd_ctx->session->kernel_session->metadata_stream_fd == 0) {
1708 ret = kernel_open_metadata_stream(cmd_ctx->session->kernel_session);
1709 if (ret < 0) {
1710 ERR("Kernel create metadata stream failed");
1711 ret = LTTCOMM_KERN_STREAM_FAIL;
1712 goto error;
1713 }
1714 }
1715 }
8c0faa1d 1716
f3ed775e
DG
1717 /* For each channel */
1718 cds_list_for_each_entry(chan, &cmd_ctx->session->kernel_session->channel_list.head, list) {
1719 if (chan->stream_count == 0) {
1720 ret = kernel_open_channel_stream(chan);
1721 if (ret < 0) {
1722 ERR("Kernel create channel stream failed");
1723 ret = LTTCOMM_KERN_STREAM_FAIL;
1724 goto error;
1725 }
1726 /* Update the stream global counter */
1727 cmd_ctx->session->kernel_session->stream_count_global += ret;
1728 }
1729 }
1730
1731 DBG("Start kernel tracing");
1732 ret = kernel_start_session(cmd_ctx->session->kernel_session);
8c0faa1d 1733 if (ret < 0) {
f3ed775e
DG
1734 ERR("Kernel start session failed");
1735 ret = LTTCOMM_KERN_START_FAIL;
8c0faa1d
DG
1736 goto error;
1737 }
8c0faa1d 1738
f3ed775e
DG
1739 ret = start_kernel_trace(cmd_ctx->session->kernel_session);
1740 if (ret < 0) {
1741 ret = LTTCOMM_KERN_START_FAIL;
8c0faa1d
DG
1742 goto error;
1743 }
8c0faa1d 1744
f3ed775e
DG
1745 /* Quiescent wait after starting trace */
1746 kernel_wait_quiescent(kernel_tracer_fd);
8c0faa1d
DG
1747 }
1748
f3ed775e 1749 /* TODO: Start all UST traces */
8c0faa1d
DG
1750
1751 ret = LTTCOMM_OK;
1752 break;
1753 }
f3ed775e 1754 case LTTNG_STOP_TRACE:
8c0faa1d 1755 {
f3ed775e 1756 struct ltt_kernel_channel *chan;
8c0faa1d
DG
1757 /* Setup lttng message with no payload */
1758 ret = setup_lttng_msg(cmd_ctx, 0);
1759 if (ret < 0) {
1760 goto setup_error;
1761 }
1762
f3ed775e
DG
1763 /* Kernel tracer */
1764 if (cmd_ctx->session->kernel_session != NULL) {
1765 DBG("Stop kernel tracing");
84291629 1766
f3ed775e
DG
1767 ret = kernel_metadata_flush_buffer(cmd_ctx->session->kernel_session->metadata_stream_fd);
1768 if (ret < 0) {
1769 ERR("Kernel metadata flush failed");
1770 }
8c0faa1d 1771
f3ed775e
DG
1772 cds_list_for_each_entry(chan, &cmd_ctx->session->kernel_session->channel_list.head, list) {
1773 ret = kernel_flush_buffer(chan);
1774 if (ret < 0) {
1775 ERR("Kernel flush buffer error");
1776 }
1777 }
1778
1779 ret = kernel_stop_session(cmd_ctx->session->kernel_session);
1780 if (ret < 0) {
1781 ERR("Kernel stop session failed");
1782 ret = LTTCOMM_KERN_STOP_FAIL;
1783 goto error;
1784 }
1785
1786 /* Quiescent wait after stopping trace */
1787 kernel_wait_quiescent(kernel_tracer_fd);
8c0faa1d
DG
1788 }
1789
f3ed775e 1790 /* TODO : User-space tracer */
8c0faa1d
DG
1791
1792 ret = LTTCOMM_OK;
1793 break;
1794 }
5e16da05
MD
1795 case LTTNG_CREATE_SESSION:
1796 {
5461b305
DG
1797 /* Setup lttng message with no payload */
1798 ret = setup_lttng_msg(cmd_ctx, 0);
1799 if (ret < 0) {
1800 goto setup_error;
1801 }
1802
f3ed775e 1803 ret = create_session(cmd_ctx->lsm->session_name, cmd_ctx->lsm->path);
5e16da05 1804 if (ret < 0) {
f3ed775e 1805 if (ret == -EEXIST) {
5e16da05
MD
1806 ret = LTTCOMM_EXIST_SESS;
1807 } else {
aaf97519 1808 ret = LTTCOMM_FATAL;
aaf97519 1809 }
5461b305 1810 goto error;
8028d920 1811 }
1657e9bb 1812
5461b305 1813 ret = LTTCOMM_OK;
5e16da05
MD
1814 break;
1815 }
1816 case LTTNG_DESTROY_SESSION:
1817 {
5461b305
DG
1818 /* Setup lttng message with no payload */
1819 ret = setup_lttng_msg(cmd_ctx, 0);
1820 if (ret < 0) {
1821 goto setup_error;
1822 }
1823
f3ed775e
DG
1824 /* Clean kernel session teardown */
1825 teardown_kernel_session(cmd_ctx->session);
1826
1827 ret = destroy_session(cmd_ctx->lsm->session_name);
5e16da05 1828 if (ret < 0) {
f3ed775e 1829 ret = LTTCOMM_FATAL;
5461b305 1830 goto error;
5e16da05 1831 }
1657e9bb 1832
7a485870
DG
1833 /*
1834 * Must notify the kernel thread here to update it's pollfd in order to
1835 * remove the channel(s)' fd just destroyed.
1836 */
1837 ret = notify_kernel_pollfd();
1838 if (ret < 0) {
1839 ret = LTTCOMM_FATAL;
1840 goto error;
1841 }
1842
5461b305
DG
1843 ret = LTTCOMM_OK;
1844 break;
5e16da05 1845 }
f3ed775e 1846 /*
5e16da05
MD
1847 case LTTNG_LIST_TRACES:
1848 {
5461b305 1849 unsigned int trace_count;
1657e9bb 1850
5461b305 1851 trace_count = get_trace_count_per_session(cmd_ctx->session);
5e16da05
MD
1852 if (trace_count == 0) {
1853 ret = LTTCOMM_NO_TRACE;
5461b305 1854 goto error;
1657e9bb 1855 }
df0da139 1856
5461b305
DG
1857 ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_trace) * trace_count);
1858 if (ret < 0) {
1859 goto setup_error;
df0da139 1860 }
ca95a216 1861
5461b305
DG
1862 get_traces_per_session(cmd_ctx->session,
1863 (struct lttng_trace *)(cmd_ctx->llm->payload));
1864
1865 ret = LTTCOMM_OK;
5e16da05
MD
1866 break;
1867 }
f3ed775e
DG
1868 */
1869 /*
5e16da05
MD
1870 case UST_CREATE_TRACE:
1871 {
5461b305 1872 ret = setup_lttng_msg(cmd_ctx, 0);
5e16da05 1873 if (ret < 0) {
5461b305 1874 goto setup_error;
fac6795d 1875 }
ce3d728c 1876
5461b305
DG
1877 ret = ust_create_trace(cmd_ctx);
1878 if (ret < 0) {
f3ed775e 1879 goto error;
5461b305
DG
1880 }
1881 break;
5e16da05 1882 }
f3ed775e
DG
1883 */
1884 case LTTNG_LIST_TRACEABLE_APPS:
5e16da05 1885 {
5461b305
DG
1886 unsigned int app_count;
1887
1888 app_count = get_app_count();
1889 DBG("Traceable application count : %d", app_count);
5e16da05
MD
1890 if (app_count == 0) {
1891 ret = LTTCOMM_NO_APPS;
5461b305 1892 goto error;
ce3d728c 1893 }
520ff687 1894
5461b305
DG
1895 ret = setup_lttng_msg(cmd_ctx, sizeof(pid_t) * app_count);
1896 if (ret < 0) {
1897 goto setup_error;
520ff687 1898 }
57167058 1899
5461b305 1900 get_app_list_pids((pid_t *)(cmd_ctx->llm->payload));
5e16da05 1901
5461b305 1902 ret = LTTCOMM_OK;
5e16da05
MD
1903 break;
1904 }
f3ed775e 1905 /*
5e16da05
MD
1906 case UST_START_TRACE:
1907 {
5461b305
DG
1908 ret = setup_lttng_msg(cmd_ctx, 0);
1909 if (ret < 0) {
1910 goto setup_error;
1911 }
ca95a216 1912
5461b305
DG
1913 ret = ust_start_trace(cmd_ctx);
1914 if (ret < 0) {
1915 goto setup_error;
1916 }
1917 break;
5e16da05
MD
1918 }
1919 case UST_STOP_TRACE:
1920 {
5461b305
DG
1921 ret = setup_lttng_msg(cmd_ctx, 0);
1922 if (ret < 0) {
1923 goto setup_error;
1924 }
ca95a216 1925
5461b305
DG
1926 ret = ust_stop_trace(cmd_ctx);
1927 if (ret < 0) {
1928 goto setup_error;
1929 }
1930 break;
5e16da05 1931 }
f3ed775e 1932 */
5e16da05
MD
1933 case LTTNG_LIST_SESSIONS:
1934 {
6c9cc2ab 1935 lock_session_list();
5461b305 1936
6c9cc2ab 1937 if (session_list_ptr->count == 0) {
f3ed775e 1938 ret = LTTCOMM_NO_SESSION;
36a83748 1939 unlock_session_list();
5461b305 1940 goto error;
57167058 1941 }
5e16da05 1942
6c9cc2ab
DG
1943 ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) *
1944 session_list_ptr->count);
5461b305 1945 if (ret < 0) {
36a83748 1946 unlock_session_list();
5461b305 1947 goto setup_error;
e065084a 1948 }
5e16da05 1949
6c9cc2ab
DG
1950 /* Filled the session array */
1951 list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload));
1952
1953 unlock_session_list();
5e16da05 1954
5461b305 1955 ret = LTTCOMM_OK;
5e16da05
MD
1956 break;
1957 }
1958 default:
1959 /* Undefined command */
5461b305
DG
1960 ret = setup_lttng_msg(cmd_ctx, 0);
1961 if (ret < 0) {
1962 goto setup_error;
1963 }
1964
5e16da05 1965 ret = LTTCOMM_UND;
5461b305 1966 break;
fac6795d
DG
1967 }
1968
5461b305
DG
1969 /* Set return code */
1970 cmd_ctx->llm->ret_code = ret;
ca95a216 1971
b5541356
DG
1972 if (cmd_ctx->session) {
1973 unlock_session(cmd_ctx->session);
1974 }
1975
e065084a
DG
1976 return ret;
1977
5461b305 1978error:
5461b305
DG
1979 if (cmd_ctx->llm == NULL) {
1980 DBG("Missing llm structure. Allocating one.");
894be886 1981 if (setup_lttng_msg(cmd_ctx, 0) < 0) {
5461b305
DG
1982 goto setup_error;
1983 }
1984 }
e065084a 1985 /* Notify client of error */
5461b305 1986 cmd_ctx->llm->ret_code = ret;
e065084a 1987
5461b305 1988setup_error:
b5541356
DG
1989 if (cmd_ctx->session) {
1990 unlock_session(cmd_ctx->session);
1991 }
8028d920 1992 return ret;
fac6795d
DG
1993}
1994
1d4b027a 1995/*
d063d709
DG
1996 * This thread manage all clients request using the unix client socket for
1997 * communication.
1d4b027a
DG
1998 */
1999static void *thread_manage_clients(void *data)
2000{
273ea72c
DG
2001 int sock = 0, ret;
2002 struct command_ctx *cmd_ctx = NULL;
2003 struct pollfd pollfd[2];
1d4b027a
DG
2004
2005 DBG("[thread] Manage client started");
2006
2007 ret = lttcomm_listen_unix_sock(client_sock);
2008 if (ret < 0) {
2009 goto error;
2010 }
2011
273ea72c
DG
2012 /* First fd is always the quit pipe */
2013 pollfd[0].fd = thread_quit_pipe[0];
2014
2015 /* Apps socket */
2016 pollfd[1].fd = client_sock;
2017 pollfd[1].events = POLLIN;
2018
1d4b027a
DG
2019 /* Notify parent pid that we are ready
2020 * to accept command for client side.
2021 */
2022 if (opt_sig_parent) {
2023 kill(ppid, SIGCHLD);
2024 }
2025
2026 while (1) {
1d4b027a 2027 DBG("Accepting client command ...");
273ea72c
DG
2028
2029 /* Inifinite blocking call, waiting for transmission */
2030 ret = poll(pollfd, 2, -1);
2031 if (ret < 0) {
2032 perror("poll client thread");
2033 goto error;
2034 }
2035
2036 /* Thread quit pipe has been closed. Killing thread. */
2037 if (pollfd[0].revents == POLLNVAL) {
2038 goto error;
2039 } else if (pollfd[1].revents == POLLERR) {
2040 ERR("Client socket poll error");
2041 goto error;
2042 }
2043
1d4b027a
DG
2044 sock = lttcomm_accept_unix_sock(client_sock);
2045 if (sock < 0) {
2046 goto error;
2047 }
2048
2049 /* Allocate context command to process the client request */
2050 cmd_ctx = malloc(sizeof(struct command_ctx));
2051
2052 /* Allocate data buffer for reception */
2053 cmd_ctx->lsm = malloc(sizeof(struct lttcomm_session_msg));
2054 cmd_ctx->llm = NULL;
2055 cmd_ctx->session = NULL;
2056
2057 /*
2058 * Data is received from the lttng client. The struct
2059 * lttcomm_session_msg (lsm) contains the command and data request of
2060 * the client.
2061 */
2062 DBG("Receiving data from client ...");
2063 ret = lttcomm_recv_unix_sock(sock, cmd_ctx->lsm, sizeof(struct lttcomm_session_msg));
2064 if (ret <= 0) {
2065 continue;
2066 }
2067
f7776ea7
DG
2068 // TODO: Validate cmd_ctx including sanity check for security purpose.
2069
1d4b027a
DG
2070 /*
2071 * This function dispatch the work to the kernel or userspace tracer
2072 * libs and fill the lttcomm_lttng_msg data structure of all the needed
2073 * informations for the client. The command context struct contains
2074 * everything this function may needs.
2075 */
2076 ret = process_client_msg(cmd_ctx);
2077 if (ret < 0) {
2078 /* TODO: Inform client somehow of the fatal error. At this point,
2079 * ret < 0 means that a malloc failed (ENOMEM). */
2080 /* Error detected but still accept command */
a2fb29a5 2081 clean_command_ctx(&cmd_ctx);
1d4b027a
DG
2082 continue;
2083 }
2084
2085 DBG("Sending response (size: %d, retcode: %d)",
2086 cmd_ctx->lttng_msg_size, cmd_ctx->llm->ret_code);
2087 ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size);
2088 if (ret < 0) {
2089 ERR("Failed to send data back to client");
2090 }
2091
a2fb29a5 2092 clean_command_ctx(&cmd_ctx);
d6e4fca4
DG
2093
2094 /* End of transmission */
2095 close(sock);
1d4b027a
DG
2096 }
2097
2098error:
273ea72c
DG
2099 DBG("Client thread dying");
2100 if (client_sock) {
2101 close(client_sock);
2102 }
2103 if (sock) {
2104 close(sock);
2105 }
2106
2107 unlink(client_unix_sock_path);
2108
a2fb29a5 2109 clean_command_ctx(&cmd_ctx);
1d4b027a
DG
2110 return NULL;
2111}
2112
2113
fac6795d
DG
2114/*
2115 * usage function on stderr
2116 */
2117static void usage(void)
2118{
b716ce68 2119 fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname);
d6f42150
DG
2120 fprintf(stderr, " -h, --help Display this usage.\n");
2121 fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n");
2122 fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n");
2123 fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n");
2124 fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n");
2125 fprintf(stderr, " -d, --daemonize Start as a daemon.\n");
2126 fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n");
2127 fprintf(stderr, " -V, --version Show version number.\n");
2128 fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n");
2129 fprintf(stderr, " -q, --quiet No output at all.\n");
2130 fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n");
fac6795d
DG
2131}
2132
2133/*
2134 * daemon argument parsing
2135 */
2136static int parse_args(int argc, char **argv)
2137{
2138 int c;
2139
2140 static struct option long_options[] = {
2141 { "client-sock", 1, 0, 'c' },
2142 { "apps-sock", 1, 0, 'a' },
d6f42150
DG
2143 { "kconsumerd-cmd-sock", 1, 0, 0 },
2144 { "kconsumerd-err-sock", 1, 0, 0 },
fac6795d 2145 { "daemonize", 0, 0, 'd' },
5b8719f5 2146 { "sig-parent", 0, 0, 'S' },
fac6795d
DG
2147 { "help", 0, 0, 'h' },
2148 { "group", 1, 0, 'g' },
2149 { "version", 0, 0, 'V' },
75462a81 2150 { "quiet", 0, 0, 'q' },
3f9947db 2151 { "verbose", 0, 0, 'v' },
fac6795d
DG
2152 { NULL, 0, 0, 0 }
2153 };
2154
2155 while (1) {
2156 int option_index = 0;
d6f42150 2157 c = getopt_long(argc, argv, "dhqvVS" "a:c:g:s:E:C:", long_options, &option_index);
fac6795d
DG
2158 if (c == -1) {
2159 break;
2160 }
2161
2162 switch (c) {
2163 case 0:
2164 fprintf(stderr, "option %s", long_options[option_index].name);
2165 if (optarg) {
2166 fprintf(stderr, " with arg %s\n", optarg);
2167 }
2168 break;
b716ce68 2169 case 'c':
fac6795d
DG
2170 snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg);
2171 break;
2172 case 'a':
2173 snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg);
2174 break;
2175 case 'd':
2176 opt_daemon = 1;
2177 break;
2178 case 'g':
2179 opt_tracing_group = strdup(optarg);
2180 break;
2181 case 'h':
2182 usage();
2183 exit(EXIT_FAILURE);
2184 case 'V':
2185 fprintf(stdout, "%s\n", VERSION);
2186 exit(EXIT_SUCCESS);
5b8719f5
DG
2187 case 'S':
2188 opt_sig_parent = 1;
2189 break;
d6f42150
DG
2190 case 'E':
2191 snprintf(kconsumerd_err_unix_sock_path, PATH_MAX, "%s", optarg);
2192 break;
2193 case 'C':
2194 snprintf(kconsumerd_cmd_unix_sock_path, PATH_MAX, "%s", optarg);
2195 break;
75462a81
DG
2196 case 'q':
2197 opt_quiet = 1;
2198 break;
3f9947db 2199 case 'v':
53086306
DG
2200 /* Verbose level can increase using multiple -v */
2201 opt_verbose += 1;
3f9947db 2202 break;
fac6795d
DG
2203 default:
2204 /* Unknown option or other error.
2205 * Error is printed by getopt, just return */
2206 return -1;
2207 }
2208 }
2209
2210 return 0;
2211}
2212
2213/*
d063d709 2214 * Creates the two needed socket by the daemon.
d6f42150
DG
2215 * apps_sock - The communication socket for all UST apps.
2216 * client_sock - The communication of the cli tool (lttng).
fac6795d
DG
2217 */
2218static int init_daemon_socket()
2219{
2220 int ret = 0;
2221 mode_t old_umask;
2222
2223 old_umask = umask(0);
2224
2225 /* Create client tool unix socket */
d6f42150
DG
2226 client_sock = lttcomm_create_unix_sock(client_unix_sock_path);
2227 if (client_sock < 0) {
2228 ERR("Create unix sock failed: %s", client_unix_sock_path);
fac6795d
DG
2229 ret = -1;
2230 goto end;
2231 }
2232
2233 /* File permission MUST be 660 */
2234 ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
2235 if (ret < 0) {
d6f42150 2236 ERR("Set file permissions failed: %s", client_unix_sock_path);
fac6795d
DG
2237 perror("chmod");
2238 goto end;
2239 }
2240
2241 /* Create the application unix socket */
d6f42150
DG
2242 apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path);
2243 if (apps_sock < 0) {
2244 ERR("Create unix sock failed: %s", apps_unix_sock_path);
fac6795d
DG
2245 ret = -1;
2246 goto end;
2247 }
2248
d6f42150 2249 /* File permission MUST be 666 */
fac6795d
DG
2250 ret = chmod(apps_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
2251 if (ret < 0) {
d6f42150 2252 ERR("Set file permissions failed: %s", apps_unix_sock_path);
fac6795d
DG
2253 perror("chmod");
2254 goto end;
2255 }
2256
2257end:
2258 umask(old_umask);
2259 return ret;
2260}
2261
2262/*
d063d709 2263 * Check if the global socket is available. If yes, error is returned.
fac6795d
DG
2264 */
2265static int check_existing_daemon()
2266{
2267 int ret;
2268
2269 ret = access(client_unix_sock_path, F_OK);
2270 if (ret == 0) {
2271 ret = access(apps_unix_sock_path, F_OK);
2272 }
2273
2274 return ret;
2275}
2276
fac6795d 2277/*
d063d709 2278 * Set the tracing group gid onto the client socket.
5e16da05 2279 *
d063d709
DG
2280 * Race window between mkdir and chown is OK because we are going from more
2281 * permissive (root.root) to les permissive (root.tracing).
fac6795d 2282 */
d6f42150 2283static int set_permissions(void)
fac6795d
DG
2284{
2285 int ret;
2286 struct group *grp;
2287
2288 /* Decide which group name to use */
2289 (opt_tracing_group != NULL) ?
2290 (grp = getgrnam(opt_tracing_group)) :
2291 (grp = getgrnam(default_tracing_group));
2292
2293 if (grp == NULL) {
a463f419
DG
2294 if (is_root) {
2295 WARN("No tracing group detected");
2296 ret = 0;
2297 } else {
2298 ERR("Missing tracing group. Aborting execution.");
2299 ret = -1;
2300 }
fac6795d
DG
2301 goto end;
2302 }
2303
d6f42150
DG
2304 /* Set lttng run dir */
2305 ret = chown(LTTNG_RUNDIR, 0, grp->gr_gid);
2306 if (ret < 0) {
2307 ERR("Unable to set group on " LTTNG_RUNDIR);
2308 perror("chown");
2309 }
2310
2311 /* lttng client socket path */
fac6795d
DG
2312 ret = chown(client_unix_sock_path, 0, grp->gr_gid);
2313 if (ret < 0) {
d6f42150
DG
2314 ERR("Unable to set group on %s", client_unix_sock_path);
2315 perror("chown");
2316 }
2317
2318 /* kconsumerd error socket path */
2319 ret = chown(kconsumerd_err_unix_sock_path, 0, grp->gr_gid);
2320 if (ret < 0) {
2321 ERR("Unable to set group on %s", kconsumerd_err_unix_sock_path);
fac6795d
DG
2322 perror("chown");
2323 }
2324
d6f42150 2325 DBG("All permissions are set");
e07ae692 2326
fac6795d
DG
2327end:
2328 return ret;
2329}
2330
7a485870 2331/*
d063d709 2332 * Create the pipe used to wake up the kernel thread.
7a485870
DG
2333 */
2334static int create_kernel_poll_pipe(void)
2335{
2336 return pipe2(kernel_poll_pipe, O_CLOEXEC);
2337}
2338
d6f42150 2339/*
d063d709 2340 * Create the lttng run directory needed for all global sockets and pipe.
d6f42150
DG
2341 */
2342static int create_lttng_rundir(void)
2343{
2344 int ret;
2345
2346 ret = mkdir(LTTNG_RUNDIR, S_IRWXU | S_IRWXG );
2347 if (ret < 0) {
b1f11e69
DG
2348 if (errno != EEXIST) {
2349 ERR("Unable to create " LTTNG_RUNDIR);
2350 goto error;
2351 } else {
2352 ret = 0;
2353 }
d6f42150
DG
2354 }
2355
2356error:
2357 return ret;
2358}
2359
2360/*
d063d709
DG
2361 * Setup sockets and directory needed by the kconsumerd communication with the
2362 * session daemon.
d6f42150
DG
2363 */
2364static int set_kconsumerd_sockets(void)
2365{
2366 int ret;
2367
2368 if (strlen(kconsumerd_err_unix_sock_path) == 0) {
2369 snprintf(kconsumerd_err_unix_sock_path, PATH_MAX, KCONSUMERD_ERR_SOCK_PATH);
2370 }
2371
2372 if (strlen(kconsumerd_cmd_unix_sock_path) == 0) {
2373 snprintf(kconsumerd_cmd_unix_sock_path, PATH_MAX, KCONSUMERD_CMD_SOCK_PATH);
2374 }
2375
2376 ret = mkdir(KCONSUMERD_PATH, S_IRWXU | S_IRWXG);
2377 if (ret < 0) {
6beb2242
DG
2378 if (errno != EEXIST) {
2379 ERR("Failed to create " KCONSUMERD_PATH);
2380 goto error;
2381 }
2382 ret = 0;
d6f42150
DG
2383 }
2384
2385 /* Create the kconsumerd error unix socket */
2386 kconsumerd_err_sock = lttcomm_create_unix_sock(kconsumerd_err_unix_sock_path);
2387 if (kconsumerd_err_sock < 0) {
2388 ERR("Create unix sock failed: %s", kconsumerd_err_unix_sock_path);
2389 ret = -1;
2390 goto error;
2391 }
2392
2393 /* File permission MUST be 660 */
2394 ret = chmod(kconsumerd_err_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
2395 if (ret < 0) {
2396 ERR("Set file permissions failed: %s", kconsumerd_err_unix_sock_path);
2397 perror("chmod");
2398 goto error;
2399 }
2400
2401error:
2402 return ret;
2403}
2404
fac6795d 2405/*
d063d709 2406 * Signal handler for the daemon
fac6795d
DG
2407 */
2408static void sighandler(int sig)
2409{
2410 switch (sig) {
2411 case SIGPIPE:
e07ae692 2412 DBG("SIGPIPE catched");
87378cf5 2413 return;
fac6795d 2414 case SIGINT:
e07ae692
DG
2415 DBG("SIGINT catched");
2416 cleanup();
2417 break;
fac6795d 2418 case SIGTERM:
e07ae692 2419 DBG("SIGTERM catched");
fac6795d 2420 cleanup();
686204ab 2421 break;
fac6795d
DG
2422 default:
2423 break;
2424 }
2425
2426 exit(EXIT_SUCCESS);
2427}
2428
2429/*
d063d709 2430 * Setup signal handler for :
1d4b027a 2431 * SIGINT, SIGTERM, SIGPIPE
fac6795d 2432 */
1d4b027a 2433static int set_signal_handler(void)
fac6795d 2434{
1d4b027a
DG
2435 int ret = 0;
2436 struct sigaction sa;
2437 sigset_t sigset;
fac6795d 2438
1d4b027a
DG
2439 if ((ret = sigemptyset(&sigset)) < 0) {
2440 perror("sigemptyset");
2441 return ret;
2442 }
d6f42150 2443
1d4b027a
DG
2444 sa.sa_handler = sighandler;
2445 sa.sa_mask = sigset;
2446 sa.sa_flags = 0;
2447 if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) {
2448 perror("sigaction");
2449 return ret;
d6f42150
DG
2450 }
2451
1d4b027a
DG
2452 if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) {
2453 perror("sigaction");
2454 return ret;
d6f42150 2455 }
aaf26714 2456
1d4b027a
DG
2457 if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) {
2458 perror("sigaction");
2459 return ret;
8c0faa1d
DG
2460 }
2461
1d4b027a
DG
2462 DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT");
2463
2464 return ret;
fac6795d
DG
2465}
2466
f3ed775e 2467/*
d063d709
DG
2468 * Set open files limit to unlimited. This daemon can open a large number of
2469 * file descriptors in order to consumer multiple kernel traces.
f3ed775e
DG
2470 */
2471static void set_ulimit(void)
2472{
2473 int ret;
2474 struct rlimit lim;
2475
a88df331 2476 /* The kernel does not allowed an infinite limit for open files */
f3ed775e
DG
2477 lim.rlim_cur = 65535;
2478 lim.rlim_max = 65535;
2479
2480 ret = setrlimit(RLIMIT_NOFILE, &lim);
2481 if (ret < 0) {
2482 perror("failed to set open files limit");
2483 }
2484}
2485
fac6795d
DG
2486/*
2487 * main
2488 */
2489int main(int argc, char **argv)
2490{
fac6795d
DG
2491 int ret = 0;
2492 void *status;
b082db07 2493 const char *home_path;
fac6795d 2494
273ea72c
DG
2495 /* Create thread quit pipe */
2496 if (init_thread_quit_pipe() < 0) {
a88df331 2497 goto exit;
273ea72c
DG
2498 }
2499
fac6795d
DG
2500 /* Parse arguments */
2501 progname = argv[0];
2502 if ((ret = parse_args(argc, argv) < 0)) {
a88df331 2503 goto exit;
fac6795d
DG
2504 }
2505
2506 /* Daemonize */
2507 if (opt_daemon) {
53094c05
DG
2508 ret = daemon(0, 0);
2509 if (ret < 0) {
2510 perror("daemon");
a88df331 2511 goto exit;
53094c05 2512 }
fac6795d
DG
2513 }
2514
2515 /* Check if daemon is UID = 0 */
2516 is_root = !getuid();
2517
fac6795d 2518 if (is_root) {
d6f42150
DG
2519 ret = create_lttng_rundir();
2520 if (ret < 0) {
a88df331 2521 goto exit;
d6f42150
DG
2522 }
2523
fac6795d 2524 if (strlen(apps_unix_sock_path) == 0) {
d6f42150
DG
2525 snprintf(apps_unix_sock_path, PATH_MAX,
2526 DEFAULT_GLOBAL_APPS_UNIX_SOCK);
fac6795d
DG
2527 }
2528
2529 if (strlen(client_unix_sock_path) == 0) {
d6f42150
DG
2530 snprintf(client_unix_sock_path, PATH_MAX,
2531 DEFAULT_GLOBAL_CLIENT_UNIX_SOCK);
2532 }
fac6795d 2533 } else {
b082db07
DG
2534 home_path = get_home_dir();
2535 if (home_path == NULL) {
273ea72c
DG
2536 /* TODO: Add --socket PATH option */
2537 ERR("Can't get HOME directory for sockets creation.");
a88df331 2538 goto exit;
b082db07
DG
2539 }
2540
fac6795d 2541 if (strlen(apps_unix_sock_path) == 0) {
d6f42150 2542 snprintf(apps_unix_sock_path, PATH_MAX,
b082db07 2543 DEFAULT_HOME_APPS_UNIX_SOCK, home_path);
fac6795d
DG
2544 }
2545
2546 /* Set the cli tool unix socket path */
2547 if (strlen(client_unix_sock_path) == 0) {
d6f42150 2548 snprintf(client_unix_sock_path, PATH_MAX,
b082db07 2549 DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path);
fac6795d
DG
2550 }
2551 }
2552
847177cd
DG
2553 DBG("Client socket path %s", client_unix_sock_path);
2554 DBG("Application socket path %s", apps_unix_sock_path);
2555
273ea72c
DG
2556 /*
2557 * See if daemon already exist. If any of the two socket needed by the
2558 * daemon are present, this test fails. However, if the daemon is killed
2559 * with a SIGKILL, those unix socket must be unlinked by hand.
fac6795d
DG
2560 */
2561 if ((ret = check_existing_daemon()) == 0) {
75462a81 2562 ERR("Already running daemon.\n");
273ea72c 2563 /*
a88df331
DG
2564 * We do not goto error because we must not cleanup() because a daemon
2565 * is already running.
ab118b20 2566 */
a88df331
DG
2567 goto exit;
2568 }
2569
2570 /* After this point, we can safely call cleanup() so goto error is used */
2571
2572 /*
2573 * These actions must be executed as root. We do that *after* setting up
2574 * the sockets path because we MUST make the check for another daemon using
2575 * those paths *before* trying to set the kernel consumer sockets and init
2576 * kernel tracer.
2577 */
2578 if (is_root) {
2579 ret = set_kconsumerd_sockets();
2580 if (ret < 0) {
2581 goto error;
2582 }
2583
2584 /* Setup kernel tracer */
2585 init_kernel_tracer();
2586
2587 /* Set ulimit for open files */
2588 set_ulimit();
fac6795d
DG
2589 }
2590
2591 if (set_signal_handler() < 0) {
2592 goto error;
2593 }
2594
d6f42150 2595 /* Setup the needed unix socket */
fac6795d
DG
2596 if (init_daemon_socket() < 0) {
2597 goto error;
2598 }
2599
2600 /* Set credentials to socket */
d6f42150 2601 if (is_root && (set_permissions() < 0)) {
fac6795d
DG
2602 goto error;
2603 }
2604
5b8719f5
DG
2605 /* Get parent pid if -S, --sig-parent is specified. */
2606 if (opt_sig_parent) {
2607 ppid = getppid();
2608 }
2609
7a485870
DG
2610 /* Setup the kernel pipe for waking up the kernel thread */
2611 if (create_kernel_poll_pipe() < 0) {
2612 goto error;
2613 }
2614
273ea72c
DG
2615 /*
2616 * Get session list pointer. This pointer MUST NOT be free().
2617 * This list is statically declared in session.c
2618 */
b5541356
DG
2619 session_list_ptr = get_session_list();
2620
fac6795d
DG
2621 while (1) {
2622 /* Create thread to manage the client socket */
1d4b027a 2623 ret = pthread_create(&client_thread, NULL, thread_manage_clients, (void *) NULL);
fac6795d
DG
2624 if (ret != 0) {
2625 perror("pthread_create");
2626 goto error;
2627 }
2628
2629 /* Create thread to manage application socket */
1d4b027a 2630 ret = pthread_create(&apps_thread, NULL, thread_manage_apps, (void *) NULL);
fac6795d
DG
2631 if (ret != 0) {
2632 perror("pthread_create");
2633 goto error;
2634 }
2635
7a485870
DG
2636 /* Create kernel thread to manage kernel event */
2637 ret = pthread_create(&kernel_thread, NULL, thread_manage_kernel, (void *) NULL);
2638 if (ret != 0) {
2639 perror("pthread_create");
2640 goto error;
2641 }
2642
1d4b027a
DG
2643 ret = pthread_join(client_thread, &status);
2644 if (ret != 0) {
2645 perror("pthread_join");
2646 goto error;
fac6795d
DG
2647 }
2648 }
2649
2650 cleanup();
5e16da05 2651 exit(EXIT_SUCCESS);
fac6795d
DG
2652
2653error:
2654 cleanup();
a88df331
DG
2655
2656exit:
5e16da05 2657 exit(EXIT_FAILURE);
fac6795d 2658}
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