Commit | Line | Data |
---|---|---|
826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
0fdd1e2c | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
fac6795d | 4 | * |
d14d33bf AM |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
91d76f53 | 8 | * |
d14d33bf AM |
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 | * |
d14d33bf AM |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
fac6795d DG |
17 | */ |
18 | ||
19 | #define _GNU_SOURCE | |
fac6795d DG |
20 | #include <getopt.h> |
21 | #include <grp.h> | |
22 | #include <limits.h> | |
23 | #include <pthread.h> | |
8c0faa1d | 24 | #include <semaphore.h> |
fac6795d DG |
25 | #include <signal.h> |
26 | #include <stdio.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
0fdd1e2c | 29 | #include <sys/mman.h> |
b73401da | 30 | #include <sys/mount.h> |
1e307fab | 31 | #include <sys/resource.h> |
fac6795d DG |
32 | #include <sys/socket.h> |
33 | #include <sys/stat.h> | |
34 | #include <sys/types.h> | |
0fdd1e2c | 35 | #include <sys/wait.h> |
5c827ce0 | 36 | #include <urcu/uatomic.h> |
fac6795d | 37 | #include <unistd.h> |
3bd1e081 | 38 | #include <config.h> |
fac6795d | 39 | |
990570ed | 40 | #include <common/common.h> |
0ba98ebc | 41 | #include <common/compat/poll.h> |
d27c42b8 | 42 | #include <common/compat/socket.h> |
db758600 DG |
43 | #include <common/defaults.h> |
44 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 45 | #include <common/futex.h> |
00e2e675 | 46 | #include <common/relayd/relayd.h> |
81b86775 | 47 | #include <common/utils.h> |
fac6795d | 48 | |
10a8a223 | 49 | #include "lttng-sessiond.h" |
54d01ffb | 50 | #include "channel.h" |
00e2e675 | 51 | #include "consumer.h" |
099e26bd | 52 | #include "context.h" |
54d01ffb | 53 | #include "event.h" |
4771f025 | 54 | #include "kernel.h" |
f1e16794 | 55 | #include "kernel-consumer.h" |
096102bd | 56 | #include "modprobe.h" |
0fdd1e2c | 57 | #include "shm.h" |
1e307fab | 58 | #include "ust-ctl.h" |
00e2e675 | 59 | #include "ust-consumer.h" |
8e68d1c8 | 60 | #include "utils.h" |
4063050c | 61 | #include "fd-limit.h" |
53a80697 | 62 | #include "filter.h" |
44a5e5eb | 63 | #include "health.h" |
fac6795d | 64 | |
ebaeda94 MD |
65 | #define CONSUMERD_FILE "lttng-consumerd" |
66 | ||
75462a81 | 67 | /* Const values */ |
686204ab | 68 | const char default_home_dir[] = DEFAULT_HOME_DIR; |
bbccc3d2 | 69 | const char default_tracing_group[] = DEFAULT_TRACING_GROUP; |
686204ab MD |
70 | const char default_ust_sock_dir[] = DEFAULT_UST_SOCK_DIR; |
71 | const char default_global_apps_pipe[] = DEFAULT_GLOBAL_APPS_PIPE; | |
72 | ||
fac6795d DG |
73 | const char *progname; |
74 | const char *opt_tracing_group; | |
5b8719f5 | 75 | static int opt_sig_parent; |
97e19046 | 76 | static int opt_verbose_consumer; |
fac6795d | 77 | static int opt_daemon; |
4fba7219 | 78 | static int opt_no_kernel; |
fac6795d | 79 | static int is_root; /* Set to 1 if the daemon is running as root */ |
1d4b027a | 80 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
67e40797 | 81 | static char *rundir; |
3bd1e081 MD |
82 | |
83 | /* Consumer daemon specific control data */ | |
84 | static struct consumer_data kconsumer_data = { | |
85 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
86 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
87 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
03550b58 MD |
88 | .err_sock = -1, |
89 | .cmd_sock = -1, | |
173af62f DG |
90 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
91 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 92 | }; |
7753dea8 MD |
93 | static struct consumer_data ustconsumer64_data = { |
94 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
95 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
96 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
97 | .err_sock = -1, |
98 | .cmd_sock = -1, | |
173af62f DG |
99 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
100 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
101 | }; |
102 | static struct consumer_data ustconsumer32_data = { | |
103 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
104 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
105 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
106 | .err_sock = -1, |
107 | .cmd_sock = -1, | |
173af62f DG |
108 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
109 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
110 | }; |
111 | ||
26c9d55e | 112 | /* Shared between threads */ |
099e26bd | 113 | static int dispatch_thread_exit; |
fac6795d | 114 | |
54d01ffb DG |
115 | /* Global application Unix socket path */ |
116 | static char apps_unix_sock_path[PATH_MAX]; | |
117 | /* Global client Unix socket path */ | |
118 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
119 | /* global wait shm path for UST */ |
120 | static char wait_shm_path[PATH_MAX]; | |
44a5e5eb DG |
121 | /* Global health check unix path */ |
122 | static char health_unix_sock_path[PATH_MAX]; | |
fac6795d | 123 | |
1d4b027a | 124 | /* Sockets and FDs */ |
a4b35e07 MD |
125 | static int client_sock = -1; |
126 | static int apps_sock = -1; | |
127 | static int kernel_tracer_fd = -1; | |
76d7553f | 128 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 129 | |
273ea72c DG |
130 | /* |
131 | * Quit pipe for all threads. This permits a single cancellation point | |
132 | * for all threads when receiving an event on the pipe. | |
133 | */ | |
76d7553f | 134 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 135 | |
099e26bd DG |
136 | /* |
137 | * This pipe is used to inform the thread managing application communication | |
138 | * that a command is queued and ready to be processed. | |
139 | */ | |
76d7553f | 140 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 141 | |
1d4b027a | 142 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 143 | static pthread_t apps_thread; |
099e26bd | 144 | static pthread_t reg_apps_thread; |
1d4b027a | 145 | static pthread_t client_thread; |
7a485870 | 146 | static pthread_t kernel_thread; |
099e26bd | 147 | static pthread_t dispatch_thread; |
44a5e5eb | 148 | static pthread_t health_thread; |
5eb91c98 | 149 | |
099e26bd DG |
150 | /* |
151 | * UST registration command queue. This queue is tied with a futex and uses a N | |
152 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
153 | * | |
154 | * The thread_manage_apps and thread_dispatch_ust_registration interact with | |
155 | * this queue and the wait/wake scheme. | |
156 | */ | |
157 | static struct ust_cmd_queue ust_cmd_queue; | |
158 | ||
b5541356 DG |
159 | /* |
160 | * Pointer initialized before thread creation. | |
161 | * | |
162 | * This points to the tracing session list containing the session count and a | |
163 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
164 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 165 | * |
d063d709 | 166 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 167 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
168 | */ |
169 | static struct ltt_session_list *session_list_ptr; | |
170 | ||
7753dea8 MD |
171 | int ust_consumerd64_fd = -1; |
172 | int ust_consumerd32_fd = -1; | |
173 | ||
fb6f1fa2 YB |
174 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
175 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
176 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
177 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
fb09408a | 178 | |
5c827ce0 DG |
179 | /* |
180 | * Consumer daemon state which is changed when spawning it, killing it or in | |
181 | * case of a fatal error. | |
182 | */ | |
183 | enum consumerd_state { | |
184 | CONSUMER_STARTED = 1, | |
185 | CONSUMER_STOPPED = 2, | |
186 | CONSUMER_ERROR = 3, | |
187 | }; | |
188 | ||
189 | /* | |
190 | * This consumer daemon state is used to validate if a client command will be | |
191 | * able to reach the consumer. If not, the client is informed. For instance, | |
192 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
193 | * error to the client. | |
194 | * | |
195 | * The following example shows a possible race condition of this scheme: | |
196 | * | |
197 | * consumer thread error happens | |
198 | * client cmd arrives | |
199 | * client cmd checks state -> still OK | |
200 | * consumer thread exit, sets error | |
201 | * client cmd try to talk to consumer | |
202 | * ... | |
203 | * | |
204 | * However, since the consumer is a different daemon, we have no way of making | |
205 | * sure the command will reach it safely even with this state flag. This is why | |
206 | * we consider that up to the state validation during command processing, the | |
207 | * command is safe. After that, we can not guarantee the correctness of the | |
208 | * client request vis-a-vis the consumer. | |
209 | */ | |
210 | static enum consumerd_state ust_consumerd_state; | |
211 | static enum consumerd_state kernel_consumerd_state; | |
212 | ||
00e2e675 DG |
213 | /* |
214 | * Used to keep a unique index for each relayd socket created where this value | |
215 | * is associated with streams on the consumer so it can match the right relayd | |
216 | * to send to. | |
217 | * | |
218 | * This value should be incremented atomically for safety purposes and future | |
219 | * possible concurrent access. | |
220 | */ | |
221 | static unsigned int relayd_net_seq_idx; | |
222 | ||
44a5e5eb DG |
223 | /* Used for the health monitoring of the session daemon. See health.h */ |
224 | struct health_state health_thread_cmd; | |
139ac872 | 225 | struct health_state health_thread_app_manage; |
44a5e5eb DG |
226 | struct health_state health_thread_app_reg; |
227 | struct health_state health_thread_kernel; | |
228 | ||
fb09408a | 229 | static |
7753dea8 | 230 | void setup_consumerd_path(void) |
fb09408a | 231 | { |
fc7a59ce | 232 | const char *bin, *libdir; |
fb09408a | 233 | |
7753dea8 MD |
234 | /* |
235 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
236 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
237 | * has not been defined. | |
7753dea8 | 238 | */ |
ebaeda94 | 239 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
240 | if (!consumerd32_bin[0]) { |
241 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
242 | } |
243 | if (!consumerd32_libdir[0]) { | |
244 | consumerd32_libdir = INSTALL_LIB_PATH; | |
245 | } | |
246 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
247 | if (!consumerd64_bin[0]) { |
248 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 249 | } |
ebaeda94 MD |
250 | if (!consumerd64_libdir[0]) { |
251 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
252 | } |
253 | #else | |
254 | #error "Unknown bitness" | |
255 | #endif | |
256 | ||
fb09408a MD |
257 | /* |
258 | * runtime env. var. overrides the build default. | |
259 | */ | |
fc7a59ce AM |
260 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
261 | if (bin) { | |
262 | consumerd32_bin = bin; | |
7753dea8 | 263 | } |
fc7a59ce AM |
264 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
265 | if (bin) { | |
266 | consumerd64_bin = bin; | |
ebaeda94 | 267 | } |
72f579ee | 268 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
269 | if (libdir) { |
270 | consumerd32_libdir = libdir; | |
271 | } | |
72f579ee | 272 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
273 | if (libdir) { |
274 | consumerd64_libdir = libdir; | |
fb09408a MD |
275 | } |
276 | } | |
277 | ||
5eb91c98 DG |
278 | /* |
279 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
280 | */ | |
281 | static int create_thread_poll_set(struct lttng_poll_event *events, | |
282 | unsigned int size) | |
283 | { | |
284 | int ret; | |
285 | ||
286 | if (events == NULL || size == 0) { | |
287 | ret = -1; | |
288 | goto error; | |
289 | } | |
290 | ||
291 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
292 | if (ret < 0) { | |
293 | goto error; | |
294 | } | |
295 | ||
296 | /* Add quit pipe */ | |
297 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN); | |
298 | if (ret < 0) { | |
299 | goto error; | |
300 | } | |
301 | ||
302 | return 0; | |
303 | ||
304 | error: | |
305 | return ret; | |
306 | } | |
307 | ||
308 | /* | |
309 | * Check if the thread quit pipe was triggered. | |
310 | * | |
311 | * Return 1 if it was triggered else 0; | |
312 | */ | |
313 | static int check_thread_quit_pipe(int fd, uint32_t events) | |
314 | { | |
315 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
316 | return 1; | |
317 | } | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
0fdd1e2c DG |
322 | /* |
323 | * Return group ID of the tracing group or -1 if not found. | |
324 | */ | |
996b65c8 MD |
325 | static gid_t allowed_group(void) |
326 | { | |
327 | struct group *grp; | |
328 | ||
274e143b MD |
329 | if (opt_tracing_group) { |
330 | grp = getgrnam(opt_tracing_group); | |
331 | } else { | |
332 | grp = getgrnam(default_tracing_group); | |
333 | } | |
996b65c8 MD |
334 | if (!grp) { |
335 | return -1; | |
336 | } else { | |
337 | return grp->gr_gid; | |
338 | } | |
339 | } | |
340 | ||
273ea72c | 341 | /* |
5eb91c98 | 342 | * Init thread quit pipe. |
273ea72c DG |
343 | * |
344 | * Return -1 on error or 0 if all pipes are created. | |
345 | */ | |
346 | static int init_thread_quit_pipe(void) | |
347 | { | |
730389d9 | 348 | int ret, i; |
273ea72c | 349 | |
730389d9 | 350 | ret = pipe(thread_quit_pipe); |
273ea72c | 351 | if (ret < 0) { |
730389d9 | 352 | PERROR("thread quit pipe"); |
273ea72c DG |
353 | goto error; |
354 | } | |
355 | ||
730389d9 DG |
356 | for (i = 0; i < 2; i++) { |
357 | ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC); | |
358 | if (ret < 0) { | |
359 | PERROR("fcntl"); | |
360 | goto error; | |
361 | } | |
362 | } | |
363 | ||
273ea72c DG |
364 | error: |
365 | return ret; | |
366 | } | |
367 | ||
fac6795d | 368 | /* |
d063d709 DG |
369 | * Complete teardown of a kernel session. This free all data structure related |
370 | * to a kernel session and update counter. | |
fac6795d | 371 | */ |
1d4b027a | 372 | static void teardown_kernel_session(struct ltt_session *session) |
fac6795d | 373 | { |
173af62f DG |
374 | int ret; |
375 | struct lttng_ht_iter iter; | |
376 | struct ltt_kernel_session *ksess; | |
377 | struct consumer_socket *socket; | |
378 | ||
8f7a84dd | 379 | if (!session->kernel_session) { |
99bab54f | 380 | DBG3("No kernel session when tearing down session"); |
84ea9c99 | 381 | return; |
8f7a84dd DG |
382 | } |
383 | ||
173af62f DG |
384 | ksess = session->kernel_session; |
385 | ||
84ea9c99 | 386 | DBG("Tearing down kernel session"); |
d9800920 | 387 | |
173af62f DG |
388 | /* |
389 | * Destroy relayd associated with the session consumer. This action is | |
390 | * valid since in order to destroy a session we must acquire the session | |
391 | * lock. This means that there CAN NOT be stream(s) being sent to a | |
392 | * consumer since this action also requires the session lock at any time. | |
393 | * | |
394 | * At this point, we are sure that not streams data will be lost after this | |
395 | * command is issued. | |
396 | */ | |
397 | if (ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET) { | |
398 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, socket, | |
399 | node.node) { | |
400 | ret = consumer_send_destroy_relayd(socket, ksess->consumer); | |
401 | if (ret < 0) { | |
402 | ERR("Unable to send destroy relayd command to consumer"); | |
403 | /* Continue since we MUST delete everything at this point. */ | |
404 | } | |
405 | } | |
406 | } | |
407 | ||
84ea9c99 MD |
408 | /* |
409 | * If a custom kernel consumer was registered, close the socket before | |
410 | * tearing down the complete kernel session structure | |
411 | */ | |
173af62f DG |
412 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, socket, |
413 | node.node) { | |
414 | if (socket->fd != kconsumer_data.cmd_sock) { | |
415 | rcu_read_lock(); | |
416 | consumer_del_socket(socket, ksess->consumer); | |
417 | lttcomm_close_unix_sock(socket->fd); | |
418 | consumer_destroy_socket(socket); | |
419 | rcu_read_unlock(); | |
420 | } | |
fac6795d | 421 | } |
84ea9c99 | 422 | |
173af62f | 423 | trace_kernel_destroy_session(ksess); |
fac6795d DG |
424 | } |
425 | ||
f6a9efaa DG |
426 | /* |
427 | * Complete teardown of all UST sessions. This will free everything on his path | |
428 | * and destroy the core essence of all ust sessions :) | |
429 | */ | |
430 | static void teardown_ust_session(struct ltt_session *session) | |
431 | { | |
84cd17c6 | 432 | int ret; |
173af62f DG |
433 | struct lttng_ht_iter iter; |
434 | struct ltt_ust_session *usess; | |
435 | struct consumer_socket *socket; | |
84cd17c6 | 436 | |
8f7a84dd | 437 | if (!session->ust_session) { |
99bab54f | 438 | DBG3("No UST session when tearing down session"); |
f470a390 | 439 | return; |
8f7a84dd | 440 | } |
173af62f | 441 | usess = session->ust_session; |
8f7a84dd | 442 | |
84ea9c99 | 443 | DBG("Tearing down UST session(s)"); |
8f7a84dd | 444 | |
173af62f DG |
445 | /* |
446 | * Destroy relayd associated with the session consumer. This action is | |
447 | * valid since in order to destroy a session we must acquire the session | |
448 | * lock. This means that there CAN NOT be stream(s) being sent to a | |
449 | * consumer since this action also requires the session lock at any time. | |
450 | * | |
3f8e211f DG |
451 | * At this point, we are sure that no data will be lost after this command |
452 | * is issued. | |
173af62f DG |
453 | */ |
454 | if (usess->consumer && usess->consumer->type == CONSUMER_DST_NET) { | |
455 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, socket, | |
456 | node.node) { | |
457 | ret = consumer_send_destroy_relayd(socket, usess->consumer); | |
458 | if (ret < 0) { | |
459 | ERR("Unable to send destroy relayd command to consumer"); | |
460 | /* Continue since we MUST delete everything at this point. */ | |
461 | } | |
462 | } | |
463 | } | |
464 | ||
465 | ret = ust_app_destroy_trace_all(usess); | |
84cd17c6 MD |
466 | if (ret) { |
467 | ERR("Error in ust_app_destroy_trace_all"); | |
468 | } | |
8f7a84dd | 469 | |
173af62f | 470 | trace_ust_destroy_session(usess); |
f6a9efaa DG |
471 | } |
472 | ||
099e26bd DG |
473 | /* |
474 | * Stop all threads by closing the thread quit pipe. | |
475 | */ | |
cf3af59e MD |
476 | static void stop_threads(void) |
477 | { | |
5eb91c98 DG |
478 | int ret; |
479 | ||
cf3af59e MD |
480 | /* Stopping all threads */ |
481 | DBG("Terminating all threads"); | |
54d01ffb | 482 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
483 | if (ret < 0) { |
484 | ERR("write error on thread quit pipe"); | |
485 | } | |
486 | ||
099e26bd | 487 | /* Dispatch thread */ |
26c9d55e | 488 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 489 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
490 | } |
491 | ||
fac6795d | 492 | /* |
d063d709 | 493 | * Cleanup the daemon |
fac6795d | 494 | */ |
cf3af59e | 495 | static void cleanup(void) |
fac6795d | 496 | { |
ef599319 | 497 | int ret; |
1d4b027a | 498 | char *cmd; |
af9737e9 | 499 | struct ltt_session *sess, *stmp; |
fac6795d | 500 | |
1d4b027a | 501 | DBG("Cleaning up"); |
e07ae692 | 502 | |
67e40797 DG |
503 | DBG("Removing %s directory", rundir); |
504 | ret = asprintf(&cmd, "rm -rf %s", rundir); | |
505 | if (ret < 0) { | |
506 | ERR("asprintf failed. Something is really wrong!"); | |
507 | } | |
5461b305 | 508 | |
67e40797 DG |
509 | /* Remove lttng run directory */ |
510 | ret = system(cmd); | |
511 | if (ret < 0) { | |
512 | ERR("Unable to clean %s", rundir); | |
1d4b027a | 513 | } |
67e40797 | 514 | free(cmd); |
5461b305 | 515 | |
99bab54f | 516 | DBG("Cleaning up all sessions"); |
fac6795d | 517 | |
b5541356 | 518 | /* Destroy session list mutex */ |
273ea72c DG |
519 | if (session_list_ptr != NULL) { |
520 | pthread_mutex_destroy(&session_list_ptr->lock); | |
521 | ||
522 | /* Cleanup ALL session */ | |
54d01ffb DG |
523 | cds_list_for_each_entry_safe(sess, stmp, |
524 | &session_list_ptr->head, list) { | |
273ea72c | 525 | teardown_kernel_session(sess); |
f6a9efaa DG |
526 | teardown_ust_session(sess); |
527 | free(sess); | |
273ea72c DG |
528 | } |
529 | } | |
530 | ||
099e26bd | 531 | DBG("Closing all UST sockets"); |
56fff090 | 532 | ust_app_clean_list(); |
099e26bd | 533 | |
4fba7219 DG |
534 | if (is_root && !opt_no_kernel) { |
535 | DBG2("Closing kernel fd"); | |
a4b35e07 | 536 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
537 | ret = close(kernel_tracer_fd); |
538 | if (ret) { | |
539 | PERROR("close"); | |
540 | } | |
a4b35e07 | 541 | } |
2f50c8a3 | 542 | DBG("Unloading kernel modules"); |
096102bd | 543 | modprobe_remove_lttng_all(); |
2f50c8a3 | 544 | } |
ef599319 DG |
545 | utils_close_pipe(kernel_poll_pipe); |
546 | utils_close_pipe(thread_quit_pipe); | |
547 | utils_close_pipe(apps_cmd_pipe); | |
421cb601 DG |
548 | |
549 | /* <fun> */ | |
f56a39af | 550 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
551 | "Matthew, BEET driven development works!%c[%dm", |
552 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
553 | /* </fun> */ | |
fac6795d DG |
554 | } |
555 | ||
e065084a | 556 | /* |
d063d709 | 557 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 558 | * |
d063d709 | 559 | * Return lttcomm error code. |
e065084a DG |
560 | */ |
561 | static int send_unix_sock(int sock, void *buf, size_t len) | |
562 | { | |
563 | /* Check valid length */ | |
564 | if (len <= 0) { | |
565 | return -1; | |
566 | } | |
567 | ||
568 | return lttcomm_send_unix_sock(sock, buf, len); | |
569 | } | |
570 | ||
5461b305 | 571 | /* |
d063d709 | 572 | * Free memory of a command context structure. |
5461b305 | 573 | */ |
a2fb29a5 | 574 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 575 | { |
a2fb29a5 DG |
576 | DBG("Clean command context structure"); |
577 | if (*cmd_ctx) { | |
578 | if ((*cmd_ctx)->llm) { | |
579 | free((*cmd_ctx)->llm); | |
5461b305 | 580 | } |
a2fb29a5 DG |
581 | if ((*cmd_ctx)->lsm) { |
582 | free((*cmd_ctx)->lsm); | |
5461b305 | 583 | } |
a2fb29a5 DG |
584 | free(*cmd_ctx); |
585 | *cmd_ctx = NULL; | |
5461b305 DG |
586 | } |
587 | } | |
588 | ||
fac6795d | 589 | /* |
0fdd1e2c | 590 | * Notify UST applications using the shm mmap futex. |
fac6795d | 591 | */ |
0fdd1e2c | 592 | static int notify_ust_apps(int active) |
fac6795d | 593 | { |
0fdd1e2c | 594 | char *wait_shm_mmap; |
fac6795d | 595 | |
0fdd1e2c | 596 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 597 | |
0fdd1e2c DG |
598 | /* See shm.c for this call implying mmap, shm and futex calls */ |
599 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
600 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
601 | goto error; |
602 | } | |
603 | ||
0fdd1e2c DG |
604 | /* Wake waiting process */ |
605 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
606 | ||
607 | /* Apps notified successfully */ | |
608 | return 0; | |
fac6795d DG |
609 | |
610 | error: | |
0fdd1e2c | 611 | return -1; |
fac6795d DG |
612 | } |
613 | ||
e065084a | 614 | /* |
d063d709 DG |
615 | * Setup the outgoing data buffer for the response (llm) by allocating the |
616 | * right amount of memory and copying the original information from the lsm | |
617 | * structure. | |
ca95a216 | 618 | * |
d063d709 | 619 | * Return total size of the buffer pointed by buf. |
ca95a216 | 620 | */ |
5461b305 | 621 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 622 | { |
f3ed775e | 623 | int ret, buf_size; |
ca95a216 | 624 | |
f3ed775e | 625 | buf_size = size; |
5461b305 | 626 | |
ba7f0ae5 | 627 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 628 | if (cmd_ctx->llm == NULL) { |
76d7553f | 629 | PERROR("zmalloc"); |
5461b305 | 630 | ret = -ENOMEM; |
ca95a216 DG |
631 | goto error; |
632 | } | |
633 | ||
5461b305 DG |
634 | /* Copy common data */ |
635 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 636 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 637 | |
5461b305 DG |
638 | cmd_ctx->llm->data_size = size; |
639 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
640 | ||
ca95a216 DG |
641 | return buf_size; |
642 | ||
643 | error: | |
644 | return ret; | |
645 | } | |
646 | ||
7a485870 | 647 | /* |
5eb91c98 | 648 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 649 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 650 | */ |
5eb91c98 | 651 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 652 | { |
5eb91c98 | 653 | int ret; |
7a485870 DG |
654 | struct ltt_session *session; |
655 | struct ltt_kernel_channel *channel; | |
656 | ||
5eb91c98 | 657 | DBG("Updating kernel poll set"); |
7a485870 | 658 | |
54d01ffb | 659 | session_lock_list(); |
b5541356 | 660 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 661 | session_lock(session); |
7a485870 | 662 | if (session->kernel_session == NULL) { |
54d01ffb | 663 | session_unlock(session); |
7a485870 DG |
664 | continue; |
665 | } | |
7a485870 | 666 | |
54d01ffb DG |
667 | cds_list_for_each_entry(channel, |
668 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
669 | /* Add channel fd to the kernel poll set */ |
670 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
671 | if (ret < 0) { | |
54d01ffb | 672 | session_unlock(session); |
5eb91c98 DG |
673 | goto error; |
674 | } | |
675 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 676 | } |
54d01ffb | 677 | session_unlock(session); |
7a485870 | 678 | } |
54d01ffb | 679 | session_unlock_list(); |
7a485870 | 680 | |
5eb91c98 | 681 | return 0; |
7a485870 DG |
682 | |
683 | error: | |
54d01ffb | 684 | session_unlock_list(); |
7a485870 DG |
685 | return -1; |
686 | } | |
687 | ||
688 | /* | |
54d01ffb | 689 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 690 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 691 | * |
d063d709 | 692 | * Useful for CPU hotplug feature. |
7a485870 | 693 | */ |
2bdd86d4 | 694 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
695 | { |
696 | int ret = 0; | |
697 | struct ltt_session *session; | |
173af62f | 698 | struct ltt_kernel_session *ksess; |
7a485870 DG |
699 | struct ltt_kernel_channel *channel; |
700 | ||
701 | DBG("Updating kernel streams for channel fd %d", fd); | |
702 | ||
54d01ffb | 703 | session_lock_list(); |
b5541356 | 704 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 705 | session_lock(session); |
7a485870 | 706 | if (session->kernel_session == NULL) { |
54d01ffb | 707 | session_unlock(session); |
7a485870 DG |
708 | continue; |
709 | } | |
173af62f | 710 | ksess = session->kernel_session; |
d9800920 | 711 | |
173af62f | 712 | cds_list_for_each_entry(channel, &ksess->channel_list.head, list) { |
7a485870 DG |
713 | if (channel->fd == fd) { |
714 | DBG("Channel found, updating kernel streams"); | |
715 | ret = kernel_open_channel_stream(channel); | |
716 | if (ret < 0) { | |
b3c750d2 | 717 | goto error; |
7a485870 | 718 | } |
d9800920 | 719 | |
7a485870 | 720 | /* |
5eb91c98 DG |
721 | * Have we already sent fds to the consumer? If yes, it means |
722 | * that tracing is started so it is safe to send our updated | |
723 | * stream fds. | |
7a485870 | 724 | */ |
173af62f DG |
725 | if (ksess->consumer_fds_sent == 1 && ksess->consumer != NULL) { |
726 | struct lttng_ht_iter iter; | |
727 | struct consumer_socket *socket; | |
728 | ||
729 | ||
730 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
731 | &iter.iter, socket, node.node) { | |
732 | /* Code flow error */ | |
733 | assert(socket->fd >= 0); | |
734 | ||
735 | pthread_mutex_lock(socket->lock); | |
736 | ret = kernel_consumer_send_channel_stream(socket->fd, | |
737 | channel, ksess); | |
738 | pthread_mutex_unlock(socket->lock); | |
739 | if (ret < 0) { | |
740 | goto error; | |
741 | } | |
7a485870 DG |
742 | } |
743 | } | |
b3c750d2 | 744 | goto error; |
7a485870 DG |
745 | } |
746 | } | |
54d01ffb | 747 | session_unlock(session); |
7a485870 | 748 | } |
54d01ffb | 749 | session_unlock_list(); |
b3c750d2 | 750 | return ret; |
7a485870 | 751 | |
b3c750d2 | 752 | error: |
54d01ffb DG |
753 | session_unlock(session); |
754 | session_unlock_list(); | |
7a485870 DG |
755 | return ret; |
756 | } | |
757 | ||
487cf67c DG |
758 | /* |
759 | * For each tracing session, update newly registered apps. | |
760 | */ | |
761 | static void update_ust_app(int app_sock) | |
762 | { | |
763 | struct ltt_session *sess, *stmp; | |
764 | ||
4ee14516 DG |
765 | session_lock_list(); |
766 | ||
487cf67c DG |
767 | /* For all tracing session(s) */ |
768 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 769 | session_lock(sess); |
421cb601 DG |
770 | if (sess->ust_session) { |
771 | ust_app_global_update(sess->ust_session, app_sock); | |
772 | } | |
4ee14516 | 773 | session_unlock(sess); |
487cf67c | 774 | } |
4ee14516 DG |
775 | |
776 | session_unlock_list(); | |
487cf67c DG |
777 | } |
778 | ||
7a485870 | 779 | /* |
d063d709 | 780 | * This thread manage event coming from the kernel. |
7a485870 | 781 | * |
d063d709 DG |
782 | * Features supported in this thread: |
783 | * -) CPU Hotplug | |
7a485870 DG |
784 | */ |
785 | static void *thread_manage_kernel(void *data) | |
786 | { | |
139ac872 | 787 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 788 | uint32_t revents, nb_fd; |
7a485870 | 789 | char tmp; |
5eb91c98 | 790 | struct lttng_poll_event events; |
7a485870 DG |
791 | |
792 | DBG("Thread manage kernel started"); | |
793 | ||
44a5e5eb DG |
794 | health_code_update(&health_thread_kernel); |
795 | ||
5eb91c98 DG |
796 | ret = create_thread_poll_set(&events, 2); |
797 | if (ret < 0) { | |
76d7553f | 798 | goto error_poll_create; |
5eb91c98 DG |
799 | } |
800 | ||
801 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
802 | if (ret < 0) { | |
803 | goto error; | |
804 | } | |
805 | ||
7a485870 | 806 | while (1) { |
44a5e5eb DG |
807 | health_code_update(&health_thread_kernel); |
808 | ||
7a485870 | 809 | if (update_poll_flag == 1) { |
5f822d0a DG |
810 | /* |
811 | * Reset number of fd in the poll set. Always 2 since there is the thread | |
812 | * quit pipe and the kernel pipe. | |
813 | */ | |
814 | events.nb_fd = 2; | |
815 | ||
5eb91c98 DG |
816 | ret = update_kernel_poll(&events); |
817 | if (ret < 0) { | |
7a485870 DG |
818 | goto error; |
819 | } | |
820 | update_poll_flag = 0; | |
821 | } | |
822 | ||
5eb91c98 DG |
823 | nb_fd = LTTNG_POLL_GETNB(&events); |
824 | ||
825 | DBG("Thread kernel polling on %d fds", nb_fd); | |
826 | ||
827 | /* Zeroed the poll events */ | |
828 | lttng_poll_reset(&events); | |
7a485870 DG |
829 | |
830 | /* Poll infinite value of time */ | |
88f2b785 | 831 | restart: |
44a5e5eb | 832 | health_poll_update(&health_thread_kernel); |
5eb91c98 | 833 | ret = lttng_poll_wait(&events, -1); |
44a5e5eb | 834 | health_poll_update(&health_thread_kernel); |
7a485870 | 835 | if (ret < 0) { |
88f2b785 MD |
836 | /* |
837 | * Restart interrupted system call. | |
838 | */ | |
839 | if (errno == EINTR) { | |
840 | goto restart; | |
841 | } | |
7a485870 DG |
842 | goto error; |
843 | } else if (ret == 0) { | |
844 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
845 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
846 | "This should not have happened! Continuing..."); | |
7a485870 DG |
847 | continue; |
848 | } | |
849 | ||
5eb91c98 DG |
850 | for (i = 0; i < nb_fd; i++) { |
851 | /* Fetch once the poll data */ | |
852 | revents = LTTNG_POLL_GETEV(&events, i); | |
853 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 854 | |
44a5e5eb DG |
855 | health_code_update(&health_thread_kernel); |
856 | ||
5eb91c98 DG |
857 | /* Thread quit pipe has been closed. Killing thread. */ |
858 | ret = check_thread_quit_pipe(pollfd, revents); | |
859 | if (ret) { | |
139ac872 MD |
860 | err = 0; |
861 | goto exit; | |
5eb91c98 | 862 | } |
7a485870 | 863 | |
5eb91c98 DG |
864 | /* Check for data on kernel pipe */ |
865 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
866 | ret = read(kernel_poll_pipe[0], &tmp, 1); | |
867 | update_poll_flag = 1; | |
868 | continue; | |
869 | } else { | |
870 | /* | |
871 | * New CPU detected by the kernel. Adding kernel stream to | |
872 | * kernel session and updating the kernel consumer | |
873 | */ | |
874 | if (revents & LPOLLIN) { | |
2bdd86d4 | 875 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
876 | if (ret < 0) { |
877 | continue; | |
878 | } | |
879 | break; | |
880 | /* | |
881 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
882 | * and unregister kernel stream at this point. | |
883 | */ | |
7a485870 | 884 | } |
7a485870 DG |
885 | } |
886 | } | |
887 | } | |
888 | ||
139ac872 | 889 | exit: |
7a485870 | 890 | error: |
5eb91c98 | 891 | lttng_poll_clean(&events); |
76d7553f | 892 | error_poll_create: |
139ac872 MD |
893 | if (err) { |
894 | health_error(&health_thread_kernel); | |
895 | ERR("Health error occurred in %s", __func__); | |
896 | } | |
897 | health_exit(&health_thread_kernel); | |
76d7553f | 898 | DBG("Kernel thread dying"); |
7a485870 DG |
899 | return NULL; |
900 | } | |
901 | ||
1d4b027a | 902 | /* |
3bd1e081 | 903 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 904 | */ |
3bd1e081 | 905 | static void *thread_manage_consumer(void *data) |
1d4b027a | 906 | { |
139ac872 | 907 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 | 908 | uint32_t revents, nb_fd; |
1d4b027a | 909 | enum lttcomm_return_code code; |
5eb91c98 | 910 | struct lttng_poll_event events; |
3bd1e081 | 911 | struct consumer_data *consumer_data = data; |
1d4b027a | 912 | |
3bd1e081 | 913 | DBG("[thread] Manage consumer started"); |
1d4b027a | 914 | |
44a5e5eb DG |
915 | health_code_update(&consumer_data->health); |
916 | ||
3bd1e081 | 917 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); |
1d4b027a | 918 | if (ret < 0) { |
76d7553f | 919 | goto error_listen; |
1d4b027a DG |
920 | } |
921 | ||
5eb91c98 DG |
922 | /* |
923 | * Pass 2 as size here for the thread quit pipe and kconsumerd_err_sock. | |
924 | * Nothing more will be added to this poll set. | |
925 | */ | |
926 | ret = create_thread_poll_set(&events, 2); | |
927 | if (ret < 0) { | |
76d7553f | 928 | goto error_poll; |
5eb91c98 | 929 | } |
273ea72c | 930 | |
3bd1e081 | 931 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
932 | if (ret < 0) { |
933 | goto error; | |
934 | } | |
935 | ||
936 | nb_fd = LTTNG_POLL_GETNB(&events); | |
273ea72c | 937 | |
44a5e5eb DG |
938 | health_code_update(&consumer_data->health); |
939 | ||
273ea72c | 940 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 941 | restart: |
44a5e5eb | 942 | health_poll_update(&consumer_data->health); |
5eb91c98 | 943 | ret = lttng_poll_wait(&events, -1); |
44a5e5eb | 944 | health_poll_update(&consumer_data->health); |
273ea72c | 945 | if (ret < 0) { |
88f2b785 MD |
946 | /* |
947 | * Restart interrupted system call. | |
948 | */ | |
949 | if (errno == EINTR) { | |
950 | goto restart; | |
951 | } | |
273ea72c DG |
952 | goto error; |
953 | } | |
954 | ||
5eb91c98 DG |
955 | for (i = 0; i < nb_fd; i++) { |
956 | /* Fetch once the poll data */ | |
957 | revents = LTTNG_POLL_GETEV(&events, i); | |
958 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
959 | ||
44a5e5eb DG |
960 | health_code_update(&consumer_data->health); |
961 | ||
5eb91c98 DG |
962 | /* Thread quit pipe has been closed. Killing thread. */ |
963 | ret = check_thread_quit_pipe(pollfd, revents); | |
964 | if (ret) { | |
139ac872 MD |
965 | err = 0; |
966 | goto exit; | |
5eb91c98 DG |
967 | } |
968 | ||
969 | /* Event on the registration socket */ | |
3bd1e081 | 970 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 971 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 972 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
973 | goto error; |
974 | } | |
975 | } | |
273ea72c DG |
976 | } |
977 | ||
3bd1e081 | 978 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
979 | if (sock < 0) { |
980 | goto error; | |
981 | } | |
982 | ||
44a5e5eb DG |
983 | health_code_update(&consumer_data->health); |
984 | ||
3bd1e081 | 985 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 986 | |
712ea556 | 987 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
988 | ret = lttcomm_recv_unix_sock(sock, &code, |
989 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
990 | if (ret <= 0) { |
991 | goto error; | |
992 | } | |
993 | ||
44a5e5eb DG |
994 | health_code_update(&consumer_data->health); |
995 | ||
3bd1e081 MD |
996 | if (code == CONSUMERD_COMMAND_SOCK_READY) { |
997 | consumer_data->cmd_sock = | |
998 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
999 | if (consumer_data->cmd_sock < 0) { | |
1000 | sem_post(&consumer_data->sem); | |
48842b30 | 1001 | PERROR("consumer connect"); |
1d4b027a DG |
1002 | goto error; |
1003 | } | |
1004 | /* Signal condition to tell that the kconsumerd is ready */ | |
3bd1e081 MD |
1005 | sem_post(&consumer_data->sem); |
1006 | DBG("consumer command socket ready"); | |
1d4b027a | 1007 | } else { |
3bd1e081 | 1008 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1009 | lttcomm_get_readable_code(-code)); |
1010 | goto error; | |
1011 | } | |
1012 | ||
54d01ffb | 1013 | /* Remove the kconsumerd error sock since we've established a connexion */ |
3bd1e081 | 1014 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1015 | if (ret < 0) { |
72079cae DG |
1016 | goto error; |
1017 | } | |
1018 | ||
5eb91c98 DG |
1019 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1020 | if (ret < 0) { | |
72079cae | 1021 | goto error; |
5eb91c98 DG |
1022 | } |
1023 | ||
44a5e5eb DG |
1024 | health_code_update(&consumer_data->health); |
1025 | ||
5eb91c98 DG |
1026 | /* Update number of fd */ |
1027 | nb_fd = LTTNG_POLL_GETNB(&events); | |
1028 | ||
1029 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1030 | restart_poll: |
44a5e5eb | 1031 | health_poll_update(&consumer_data->health); |
5eb91c98 | 1032 | ret = lttng_poll_wait(&events, -1); |
44a5e5eb | 1033 | health_poll_update(&consumer_data->health); |
5eb91c98 | 1034 | if (ret < 0) { |
88f2b785 MD |
1035 | /* |
1036 | * Restart interrupted system call. | |
1037 | */ | |
1038 | if (errno == EINTR) { | |
1039 | goto restart_poll; | |
1040 | } | |
72079cae DG |
1041 | goto error; |
1042 | } | |
1043 | ||
5eb91c98 DG |
1044 | for (i = 0; i < nb_fd; i++) { |
1045 | /* Fetch once the poll data */ | |
1046 | revents = LTTNG_POLL_GETEV(&events, i); | |
1047 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1048 | ||
44a5e5eb DG |
1049 | health_code_update(&consumer_data->health); |
1050 | ||
5eb91c98 DG |
1051 | /* Thread quit pipe has been closed. Killing thread. */ |
1052 | ret = check_thread_quit_pipe(pollfd, revents); | |
1053 | if (ret) { | |
139ac872 MD |
1054 | err = 0; |
1055 | goto exit; | |
5eb91c98 DG |
1056 | } |
1057 | ||
1058 | /* Event on the kconsumerd socket */ | |
1059 | if (pollfd == sock) { | |
1060 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1061 | ERR("consumer err socket second poll error"); |
5eb91c98 DG |
1062 | goto error; |
1063 | } | |
1064 | } | |
1065 | } | |
1066 | ||
44a5e5eb DG |
1067 | health_code_update(&consumer_data->health); |
1068 | ||
712ea556 | 1069 | /* Wait for any kconsumerd error */ |
54d01ffb DG |
1070 | ret = lttcomm_recv_unix_sock(sock, &code, |
1071 | sizeof(enum lttcomm_return_code)); | |
712ea556 | 1072 | if (ret <= 0) { |
3bd1e081 | 1073 | ERR("consumer closed the command socket"); |
712ea556 | 1074 | goto error; |
6f61d021 | 1075 | } |
1d4b027a | 1076 | |
3bd1e081 | 1077 | ERR("consumer return code : %s", lttcomm_get_readable_code(-code)); |
712ea556 | 1078 | |
139ac872 | 1079 | exit: |
1d4b027a | 1080 | error: |
5c827ce0 DG |
1081 | /* Immediately set the consumerd state to stopped */ |
1082 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1083 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1084 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1085 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1086 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1087 | } else { | |
1088 | /* Code flow error... */ | |
1089 | assert(0); | |
1090 | } | |
1091 | ||
76d7553f MD |
1092 | if (consumer_data->err_sock >= 0) { |
1093 | ret = close(consumer_data->err_sock); | |
1094 | if (ret) { | |
1095 | PERROR("close"); | |
1096 | } | |
1097 | } | |
1098 | if (consumer_data->cmd_sock >= 0) { | |
1099 | ret = close(consumer_data->cmd_sock); | |
1100 | if (ret) { | |
1101 | PERROR("close"); | |
1102 | } | |
1103 | } | |
1104 | if (sock >= 0) { | |
1105 | ret = close(sock); | |
1106 | if (ret) { | |
1107 | PERROR("close"); | |
1108 | } | |
1109 | } | |
273ea72c | 1110 | |
3bd1e081 MD |
1111 | unlink(consumer_data->err_unix_sock_path); |
1112 | unlink(consumer_data->cmd_unix_sock_path); | |
1113 | consumer_data->pid = 0; | |
1d4b027a | 1114 | |
5eb91c98 | 1115 | lttng_poll_clean(&events); |
76d7553f MD |
1116 | error_poll: |
1117 | error_listen: | |
139ac872 MD |
1118 | if (err) { |
1119 | health_error(&consumer_data->health); | |
1120 | ERR("Health error occurred in %s", __func__); | |
1121 | } | |
1122 | health_exit(&consumer_data->health); | |
76d7553f | 1123 | DBG("consumer thread cleanup completed"); |
0177d773 | 1124 | |
5eb91c98 | 1125 | return NULL; |
099e26bd DG |
1126 | } |
1127 | ||
099e26bd DG |
1128 | /* |
1129 | * This thread manage application communication. | |
1d4b027a DG |
1130 | */ |
1131 | static void *thread_manage_apps(void *data) | |
099e26bd | 1132 | { |
139ac872 | 1133 | int i, ret, pollfd, err = -1; |
5eb91c98 | 1134 | uint32_t revents, nb_fd; |
099e26bd | 1135 | struct ust_command ust_cmd; |
5eb91c98 | 1136 | struct lttng_poll_event events; |
099e26bd DG |
1137 | |
1138 | DBG("[thread] Manage application started"); | |
1139 | ||
f6a9efaa DG |
1140 | rcu_register_thread(); |
1141 | rcu_thread_online(); | |
1142 | ||
139ac872 | 1143 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1144 | |
5eb91c98 DG |
1145 | ret = create_thread_poll_set(&events, 2); |
1146 | if (ret < 0) { | |
76d7553f | 1147 | goto error_poll_create; |
5eb91c98 | 1148 | } |
099e26bd | 1149 | |
5eb91c98 DG |
1150 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1151 | if (ret < 0) { | |
1152 | goto error; | |
1153 | } | |
099e26bd | 1154 | |
139ac872 | 1155 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1156 | |
5eb91c98 DG |
1157 | while (1) { |
1158 | /* Zeroed the events structure */ | |
1159 | lttng_poll_reset(&events); | |
0177d773 | 1160 | |
5eb91c98 | 1161 | nb_fd = LTTNG_POLL_GETNB(&events); |
099e26bd DG |
1162 | |
1163 | DBG("Apps thread polling on %d fds", nb_fd); | |
1164 | ||
1165 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1166 | restart: |
139ac872 | 1167 | health_poll_update(&health_thread_app_manage); |
5eb91c98 | 1168 | ret = lttng_poll_wait(&events, -1); |
139ac872 | 1169 | health_poll_update(&health_thread_app_manage); |
099e26bd | 1170 | if (ret < 0) { |
88f2b785 MD |
1171 | /* |
1172 | * Restart interrupted system call. | |
1173 | */ | |
1174 | if (errno == EINTR) { | |
1175 | goto restart; | |
1176 | } | |
099e26bd DG |
1177 | goto error; |
1178 | } | |
1179 | ||
5eb91c98 DG |
1180 | for (i = 0; i < nb_fd; i++) { |
1181 | /* Fetch once the poll data */ | |
1182 | revents = LTTNG_POLL_GETEV(&events, i); | |
1183 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1184 | ||
139ac872 | 1185 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1186 | |
5eb91c98 DG |
1187 | /* Thread quit pipe has been closed. Killing thread. */ |
1188 | ret = check_thread_quit_pipe(pollfd, revents); | |
1189 | if (ret) { | |
139ac872 MD |
1190 | err = 0; |
1191 | goto exit; | |
5eb91c98 | 1192 | } |
099e26bd | 1193 | |
5eb91c98 DG |
1194 | /* Inspect the apps cmd pipe */ |
1195 | if (pollfd == apps_cmd_pipe[0]) { | |
1196 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1197 | ERR("Apps command pipe error"); | |
0177d773 | 1198 | goto error; |
5eb91c98 DG |
1199 | } else if (revents & LPOLLIN) { |
1200 | /* Empty pipe */ | |
1201 | ret = read(apps_cmd_pipe[0], &ust_cmd, sizeof(ust_cmd)); | |
1202 | if (ret < 0 || ret < sizeof(ust_cmd)) { | |
76d7553f | 1203 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1204 | goto error; |
1205 | } | |
099e26bd | 1206 | |
139ac872 | 1207 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1208 | |
5eb91c98 | 1209 | /* Register applicaton to the session daemon */ |
56fff090 | 1210 | ret = ust_app_register(&ust_cmd.reg_msg, |
54d01ffb | 1211 | ust_cmd.sock); |
88ff5b7f | 1212 | if (ret == -ENOMEM) { |
5eb91c98 | 1213 | goto error; |
88ff5b7f MD |
1214 | } else if (ret < 0) { |
1215 | break; | |
5eb91c98 DG |
1216 | } |
1217 | ||
139ac872 | 1218 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1219 | |
acc7b41b | 1220 | /* |
e0c7ec2b | 1221 | * Validate UST version compatibility. |
acc7b41b | 1222 | */ |
e0c7ec2b DG |
1223 | ret = ust_app_validate_version(ust_cmd.sock); |
1224 | if (ret >= 0) { | |
1225 | /* | |
1226 | * Add channel(s) and event(s) to newly registered apps | |
1227 | * from lttng global UST domain. | |
1228 | */ | |
1229 | update_ust_app(ust_cmd.sock); | |
1230 | } | |
acc7b41b | 1231 | |
139ac872 | 1232 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1233 | |
f2ca2e25 | 1234 | ret = ust_app_register_done(ust_cmd.sock); |
5eb91c98 DG |
1235 | if (ret < 0) { |
1236 | /* | |
1237 | * If the registration is not possible, we simply | |
1238 | * unregister the apps and continue | |
1239 | */ | |
56fff090 | 1240 | ust_app_unregister(ust_cmd.sock); |
5eb91c98 DG |
1241 | } else { |
1242 | /* | |
1243 | * We just need here to monitor the close of the UST | |
1244 | * socket and poll set monitor those by default. | |
a9ade966 MD |
1245 | * Listen on POLLIN (even if we never expect any |
1246 | * data) to ensure that hangup wakes us. | |
5eb91c98 | 1247 | */ |
a9ade966 | 1248 | ret = lttng_poll_add(&events, ust_cmd.sock, LPOLLIN); |
5eb91c98 DG |
1249 | if (ret < 0) { |
1250 | goto error; | |
1251 | } | |
1252 | ||
54d01ffb DG |
1253 | DBG("Apps with sock %d added to poll set", |
1254 | ust_cmd.sock); | |
5eb91c98 | 1255 | } |
487cf67c | 1256 | |
139ac872 | 1257 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1258 | |
5eb91c98 | 1259 | break; |
0177d773 | 1260 | } |
5eb91c98 DG |
1261 | } else { |
1262 | /* | |
54d01ffb DG |
1263 | * At this point, we know that a registered application made |
1264 | * the event at poll_wait. | |
5eb91c98 DG |
1265 | */ |
1266 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1267 | /* Removing from the poll set */ | |
1268 | ret = lttng_poll_del(&events, pollfd); | |
1269 | if (ret < 0) { | |
1270 | goto error; | |
1271 | } | |
099e26bd | 1272 | |
b9d9b220 | 1273 | /* Socket closed on remote end. */ |
56fff090 | 1274 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1275 | break; |
1276 | } | |
099e26bd | 1277 | } |
44a5e5eb | 1278 | |
139ac872 | 1279 | health_code_update(&health_thread_app_manage); |
099e26bd | 1280 | } |
099e26bd DG |
1281 | } |
1282 | ||
139ac872 | 1283 | exit: |
099e26bd | 1284 | error: |
5eb91c98 | 1285 | lttng_poll_clean(&events); |
76d7553f | 1286 | error_poll_create: |
139ac872 MD |
1287 | if (err) { |
1288 | health_error(&health_thread_app_manage); | |
1289 | ERR("Health error occurred in %s", __func__); | |
1290 | } | |
1291 | health_exit(&health_thread_app_manage); | |
76d7553f | 1292 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1293 | rcu_thread_offline(); |
1294 | rcu_unregister_thread(); | |
099e26bd DG |
1295 | return NULL; |
1296 | } | |
1297 | ||
1298 | /* | |
1299 | * Dispatch request from the registration threads to the application | |
1300 | * communication thread. | |
1301 | */ | |
1302 | static void *thread_dispatch_ust_registration(void *data) | |
1303 | { | |
1304 | int ret; | |
1305 | struct cds_wfq_node *node; | |
1306 | struct ust_command *ust_cmd = NULL; | |
1307 | ||
1308 | DBG("[thread] Dispatch UST command started"); | |
1309 | ||
26c9d55e | 1310 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
099e26bd DG |
1311 | /* Atomically prepare the queue futex */ |
1312 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1313 | ||
1314 | do { | |
1315 | /* Dequeue command for registration */ | |
1316 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1317 | if (node == NULL) { | |
00a17c97 | 1318 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1319 | /* Continue thread execution */ |
1320 | break; | |
1321 | } | |
1322 | ||
1323 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1324 | ||
2f50c8a3 DG |
1325 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1326 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1327 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1328 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1329 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1330 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
099e26bd DG |
1331 | /* |
1332 | * Inform apps thread of the new application registration. This | |
1333 | * call is blocking so we can be assured that the data will be read | |
1334 | * at some point in time or wait to the end of the world :) | |
1335 | */ | |
1336 | ret = write(apps_cmd_pipe[1], ust_cmd, | |
1337 | sizeof(struct ust_command)); | |
1338 | if (ret < 0) { | |
76d7553f | 1339 | PERROR("write apps cmd pipe"); |
099e26bd DG |
1340 | if (errno == EBADF) { |
1341 | /* | |
1342 | * We can't inform the application thread to process | |
1343 | * registration. We will exit or else application | |
1344 | * registration will not occur and tracing will never | |
1345 | * start. | |
1346 | */ | |
1347 | goto error; | |
1348 | } | |
1349 | } | |
1350 | free(ust_cmd); | |
1351 | } while (node != NULL); | |
1352 | ||
1353 | /* Futex wait on queue. Blocking call on futex() */ | |
1354 | futex_nto1_wait(&ust_cmd_queue.futex); | |
1355 | } | |
1356 | ||
1357 | error: | |
1358 | DBG("Dispatch thread dying"); | |
1359 | return NULL; | |
1360 | } | |
1361 | ||
1362 | /* | |
1363 | * This thread manage application registration. | |
1364 | */ | |
1365 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1366 | { |
139ac872 | 1367 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
1368 | uint32_t revents, nb_fd; |
1369 | struct lttng_poll_event events; | |
099e26bd DG |
1370 | /* |
1371 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1372 | * freed in the manage apps thread. | |
1373 | */ | |
1374 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1375 | |
099e26bd | 1376 | DBG("[thread] Manage application registration started"); |
1d4b027a DG |
1377 | |
1378 | ret = lttcomm_listen_unix_sock(apps_sock); | |
1379 | if (ret < 0) { | |
76d7553f | 1380 | goto error_listen; |
1d4b027a DG |
1381 | } |
1382 | ||
5eb91c98 DG |
1383 | /* |
1384 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1385 | * more will be added to this poll set. | |
1386 | */ | |
1387 | ret = create_thread_poll_set(&events, 2); | |
1388 | if (ret < 0) { | |
76d7553f | 1389 | goto error_create_poll; |
5eb91c98 | 1390 | } |
273ea72c | 1391 | |
5eb91c98 DG |
1392 | /* Add the application registration socket */ |
1393 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1394 | if (ret < 0) { | |
76d7553f | 1395 | goto error_poll_add; |
5eb91c98 | 1396 | } |
273ea72c | 1397 | |
1d4b027a | 1398 | /* Notify all applications to register */ |
0fdd1e2c DG |
1399 | ret = notify_ust_apps(1); |
1400 | if (ret < 0) { | |
1401 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1402 | "Execution continues but there might be problem for already\n" |
1403 | "running applications that wishes to register."); | |
0fdd1e2c | 1404 | } |
1d4b027a DG |
1405 | |
1406 | while (1) { | |
1407 | DBG("Accepting application registration"); | |
273ea72c | 1408 | |
5eb91c98 DG |
1409 | nb_fd = LTTNG_POLL_GETNB(&events); |
1410 | ||
273ea72c | 1411 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 1412 | restart: |
139ac872 | 1413 | health_poll_update(&health_thread_app_reg); |
5eb91c98 | 1414 | ret = lttng_poll_wait(&events, -1); |
139ac872 | 1415 | health_poll_update(&health_thread_app_reg); |
273ea72c | 1416 | if (ret < 0) { |
88f2b785 MD |
1417 | /* |
1418 | * Restart interrupted system call. | |
1419 | */ | |
1420 | if (errno == EINTR) { | |
1421 | goto restart; | |
1422 | } | |
273ea72c DG |
1423 | goto error; |
1424 | } | |
1425 | ||
5eb91c98 | 1426 | for (i = 0; i < nb_fd; i++) { |
139ac872 MD |
1427 | health_code_update(&health_thread_app_reg); |
1428 | ||
5eb91c98 DG |
1429 | /* Fetch once the poll data */ |
1430 | revents = LTTNG_POLL_GETEV(&events, i); | |
1431 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1432 | |
5eb91c98 DG |
1433 | /* Thread quit pipe has been closed. Killing thread. */ |
1434 | ret = check_thread_quit_pipe(pollfd, revents); | |
1435 | if (ret) { | |
139ac872 MD |
1436 | err = 0; |
1437 | goto exit; | |
90014c57 | 1438 | } |
1d4b027a | 1439 | |
5eb91c98 DG |
1440 | /* Event on the registration socket */ |
1441 | if (pollfd == apps_sock) { | |
1442 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1443 | ERR("Register apps socket poll error"); | |
1444 | goto error; | |
1445 | } else if (revents & LPOLLIN) { | |
1446 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1447 | if (sock < 0) { | |
1448 | goto error; | |
1449 | } | |
099e26bd | 1450 | |
5eb91c98 | 1451 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1452 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1453 | if (ust_cmd == NULL) { |
76d7553f | 1454 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
1455 | goto error; |
1456 | } | |
1d4b027a | 1457 | |
5eb91c98 DG |
1458 | /* |
1459 | * Using message-based transmissions to ensure we don't | |
1460 | * have to deal with partially received messages. | |
1461 | */ | |
4063050c MD |
1462 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
1463 | if (ret < 0) { | |
1464 | ERR("Exhausted file descriptors allowed for applications."); | |
1465 | free(ust_cmd); | |
1466 | ret = close(sock); | |
1467 | if (ret) { | |
1468 | PERROR("close"); | |
1469 | } | |
1470 | sock = -1; | |
1471 | continue; | |
1472 | } | |
139ac872 | 1473 | health_code_update(&health_thread_app_reg); |
5eb91c98 DG |
1474 | ret = lttcomm_recv_unix_sock(sock, &ust_cmd->reg_msg, |
1475 | sizeof(struct ust_register_msg)); | |
1476 | if (ret < 0 || ret < sizeof(struct ust_register_msg)) { | |
1477 | if (ret < 0) { | |
76d7553f | 1478 | PERROR("lttcomm_recv_unix_sock register apps"); |
5eb91c98 DG |
1479 | } else { |
1480 | ERR("Wrong size received on apps register"); | |
1481 | } | |
1482 | free(ust_cmd); | |
76d7553f MD |
1483 | ret = close(sock); |
1484 | if (ret) { | |
1485 | PERROR("close"); | |
1486 | } | |
4063050c | 1487 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 1488 | sock = -1; |
5eb91c98 DG |
1489 | continue; |
1490 | } | |
139ac872 | 1491 | health_code_update(&health_thread_app_reg); |
099e26bd | 1492 | |
5eb91c98 | 1493 | ust_cmd->sock = sock; |
34a2494f | 1494 | sock = -1; |
099e26bd | 1495 | |
5eb91c98 DG |
1496 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1497 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1498 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1499 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1500 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1501 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1502 | |
5eb91c98 DG |
1503 | /* |
1504 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1505 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1506 | */ |
1507 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1508 | ||
1509 | /* | |
1510 | * Wake the registration queue futex. Implicit memory | |
1511 | * barrier with the exchange in cds_wfq_enqueue. | |
1512 | */ | |
1513 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1514 | } | |
1515 | } | |
90014c57 | 1516 | } |
1d4b027a DG |
1517 | } |
1518 | ||
139ac872 | 1519 | exit: |
1d4b027a | 1520 | error: |
139ac872 MD |
1521 | if (err) { |
1522 | health_error(&health_thread_app_reg); | |
1523 | ERR("Health error occurred in %s", __func__); | |
1524 | } | |
1525 | health_exit(&health_thread_app_reg); | |
1526 | ||
0fdd1e2c DG |
1527 | /* Notify that the registration thread is gone */ |
1528 | notify_ust_apps(0); | |
1529 | ||
a4b35e07 | 1530 | if (apps_sock >= 0) { |
76d7553f MD |
1531 | ret = close(apps_sock); |
1532 | if (ret) { | |
1533 | PERROR("close"); | |
1534 | } | |
a4b35e07 | 1535 | } |
46c3f085 | 1536 | if (sock >= 0) { |
76d7553f MD |
1537 | ret = close(sock); |
1538 | if (ret) { | |
1539 | PERROR("close"); | |
1540 | } | |
4063050c | 1541 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 1542 | } |
273ea72c | 1543 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1544 | |
76d7553f | 1545 | error_poll_add: |
5eb91c98 | 1546 | lttng_poll_clean(&events); |
76d7553f MD |
1547 | error_listen: |
1548 | error_create_poll: | |
1549 | DBG("UST Registration thread cleanup complete"); | |
5eb91c98 | 1550 | |
1d4b027a DG |
1551 | return NULL; |
1552 | } | |
1553 | ||
8c0faa1d | 1554 | /* |
3bd1e081 | 1555 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1556 | * exec or it will fails. |
8c0faa1d | 1557 | */ |
3bd1e081 | 1558 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d DG |
1559 | { |
1560 | int ret; | |
ee0b0061 DG |
1561 | struct timespec timeout; |
1562 | ||
1563 | timeout.tv_sec = DEFAULT_SEM_WAIT_TIMEOUT; | |
1564 | timeout.tv_nsec = 0; | |
8c0faa1d DG |
1565 | |
1566 | /* Setup semaphore */ | |
3bd1e081 | 1567 | ret = sem_init(&consumer_data->sem, 0, 0); |
ee0b0061 | 1568 | if (ret < 0) { |
3bd1e081 | 1569 | PERROR("sem_init consumer semaphore"); |
ee0b0061 DG |
1570 | goto error; |
1571 | } | |
8c0faa1d | 1572 | |
3bd1e081 MD |
1573 | ret = pthread_create(&consumer_data->thread, NULL, |
1574 | thread_manage_consumer, consumer_data); | |
8c0faa1d | 1575 | if (ret != 0) { |
3bd1e081 | 1576 | PERROR("pthread_create consumer"); |
ee0b0061 | 1577 | ret = -1; |
8c0faa1d DG |
1578 | goto error; |
1579 | } | |
1580 | ||
ee0b0061 DG |
1581 | /* Get time for sem_timedwait absolute timeout */ |
1582 | ret = clock_gettime(CLOCK_REALTIME, &timeout); | |
1583 | if (ret < 0) { | |
3bd1e081 | 1584 | PERROR("clock_gettime spawn consumer"); |
ee0b0061 | 1585 | /* Infinite wait for the kconsumerd thread to be ready */ |
3bd1e081 | 1586 | ret = sem_wait(&consumer_data->sem); |
ee0b0061 DG |
1587 | } else { |
1588 | /* Normal timeout if the gettime was successful */ | |
1589 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
3bd1e081 | 1590 | ret = sem_timedwait(&consumer_data->sem, &timeout); |
ee0b0061 | 1591 | } |
8c0faa1d | 1592 | |
ee0b0061 DG |
1593 | if (ret < 0) { |
1594 | if (errno == ETIMEDOUT) { | |
1595 | /* | |
1596 | * Call has timed out so we kill the kconsumerd_thread and return | |
1597 | * an error. | |
1598 | */ | |
3bd1e081 MD |
1599 | ERR("The consumer thread was never ready. Killing it"); |
1600 | ret = pthread_cancel(consumer_data->thread); | |
ee0b0061 | 1601 | if (ret < 0) { |
3bd1e081 | 1602 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
1603 | } |
1604 | } else { | |
3bd1e081 | 1605 | PERROR("semaphore wait failed consumer thread"); |
ee0b0061 DG |
1606 | } |
1607 | goto error; | |
1608 | } | |
1609 | ||
3bd1e081 MD |
1610 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1611 | if (consumer_data->pid == 0) { | |
712ea556 | 1612 | ERR("Kconsumerd did not start"); |
3bd1e081 | 1613 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
1614 | goto error; |
1615 | } | |
3bd1e081 | 1616 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 1617 | |
8c0faa1d DG |
1618 | return 0; |
1619 | ||
1620 | error: | |
1621 | return ret; | |
1622 | } | |
1623 | ||
d9800920 | 1624 | /* |
3bd1e081 | 1625 | * Join consumer thread |
d9800920 | 1626 | */ |
3bd1e081 | 1627 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
1628 | { |
1629 | void *status; | |
1630 | int ret; | |
1631 | ||
e8209f6b DG |
1632 | /* Consumer pid must be a real one. */ |
1633 | if (consumer_data->pid > 0) { | |
3bd1e081 | 1634 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 1635 | if (ret) { |
3bd1e081 | 1636 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
1637 | return ret; |
1638 | } | |
3bd1e081 | 1639 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
1640 | } else { |
1641 | return 0; | |
1642 | } | |
1643 | } | |
1644 | ||
8c0faa1d | 1645 | /* |
3bd1e081 | 1646 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 1647 | * |
d063d709 | 1648 | * Return pid if successful else -1. |
8c0faa1d | 1649 | */ |
3bd1e081 | 1650 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
1651 | { |
1652 | int ret; | |
1653 | pid_t pid; | |
94c55f17 | 1654 | const char *consumer_to_use; |
53086306 | 1655 | const char *verbosity; |
94c55f17 | 1656 | struct stat st; |
8c0faa1d | 1657 | |
3bd1e081 | 1658 | DBG("Spawning consumerd"); |
c49dc785 | 1659 | |
8c0faa1d DG |
1660 | pid = fork(); |
1661 | if (pid == 0) { | |
1662 | /* | |
3bd1e081 | 1663 | * Exec consumerd. |
8c0faa1d | 1664 | */ |
daee5345 | 1665 | if (opt_verbose_consumer) { |
53086306 DG |
1666 | verbosity = "--verbose"; |
1667 | } else { | |
1668 | verbosity = "--quiet"; | |
1669 | } | |
3bd1e081 MD |
1670 | switch (consumer_data->type) { |
1671 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 1672 | /* |
c7704d57 DG |
1673 | * Find out which consumerd to execute. We will first try the |
1674 | * 64-bit path, then the sessiond's installation directory, and | |
1675 | * fallback on the 32-bit one, | |
94c55f17 | 1676 | */ |
63a799e8 AM |
1677 | DBG3("Looking for a kernel consumer at these locations:"); |
1678 | DBG3(" 1) %s", consumerd64_bin); | |
1679 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
1680 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 1681 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 1682 | DBG3("Found location #1"); |
94c55f17 | 1683 | consumer_to_use = consumerd64_bin; |
94c55f17 | 1684 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 1685 | DBG3("Found location #2"); |
94c55f17 | 1686 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 1687 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 1688 | DBG3("Found location #3"); |
eb1e0bd4 | 1689 | consumer_to_use = consumerd32_bin; |
94c55f17 | 1690 | } else { |
63a799e8 | 1691 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
1692 | break; |
1693 | } | |
1694 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
1695 | execl(consumer_to_use, | |
1696 | "lttng-consumerd", verbosity, "-k", | |
1697 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
1698 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1699 | NULL); | |
3bd1e081 | 1700 | break; |
7753dea8 MD |
1701 | case LTTNG_CONSUMER64_UST: |
1702 | { | |
b1e0b6b6 | 1703 | char *tmpnew = NULL; |
8f4905da MD |
1704 | |
1705 | if (consumerd64_libdir[0] != '\0') { | |
1706 | char *tmp; | |
1707 | size_t tmplen; | |
1708 | ||
1709 | tmp = getenv("LD_LIBRARY_PATH"); | |
1710 | if (!tmp) { | |
1711 | tmp = ""; | |
1712 | } | |
1713 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1714 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
1715 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1716 | if (!tmpnew) { | |
1717 | ret = -ENOMEM; | |
1718 | goto error; | |
1719 | } | |
1720 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1721 | strcat(tmpnew, consumerd64_libdir); | |
1722 | if (tmp[0] != '\0') { | |
1723 | strcat(tmpnew, ":"); | |
1724 | strcat(tmpnew, tmp); | |
1725 | } | |
1726 | ret = putenv(tmpnew); | |
1727 | if (ret) { | |
1728 | ret = -errno; | |
1729 | goto error; | |
1730 | } | |
1731 | } | |
94c55f17 | 1732 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 1733 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1734 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1735 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1736 | NULL); | |
8f4905da MD |
1737 | if (consumerd64_libdir[0] != '\0') { |
1738 | free(tmpnew); | |
1739 | } | |
1740 | if (ret) { | |
1741 | goto error; | |
1742 | } | |
3bd1e081 | 1743 | break; |
7753dea8 MD |
1744 | } |
1745 | case LTTNG_CONSUMER32_UST: | |
1746 | { | |
937dde8e | 1747 | char *tmpnew = NULL; |
8f4905da MD |
1748 | |
1749 | if (consumerd32_libdir[0] != '\0') { | |
1750 | char *tmp; | |
1751 | size_t tmplen; | |
1752 | ||
1753 | tmp = getenv("LD_LIBRARY_PATH"); | |
1754 | if (!tmp) { | |
1755 | tmp = ""; | |
1756 | } | |
1757 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1758 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
1759 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1760 | if (!tmpnew) { | |
1761 | ret = -ENOMEM; | |
1762 | goto error; | |
1763 | } | |
1764 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1765 | strcat(tmpnew, consumerd32_libdir); | |
1766 | if (tmp[0] != '\0') { | |
1767 | strcat(tmpnew, ":"); | |
1768 | strcat(tmpnew, tmp); | |
1769 | } | |
1770 | ret = putenv(tmpnew); | |
1771 | if (ret) { | |
1772 | ret = -errno; | |
1773 | goto error; | |
1774 | } | |
1775 | } | |
94c55f17 | 1776 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 1777 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1778 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1779 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1780 | NULL); | |
8f4905da MD |
1781 | if (consumerd32_libdir[0] != '\0') { |
1782 | free(tmpnew); | |
1783 | } | |
1784 | if (ret) { | |
1785 | goto error; | |
1786 | } | |
7753dea8 MD |
1787 | break; |
1788 | } | |
3bd1e081 | 1789 | default: |
76d7553f | 1790 | PERROR("unknown consumer type"); |
3bd1e081 MD |
1791 | exit(EXIT_FAILURE); |
1792 | } | |
8c0faa1d | 1793 | if (errno != 0) { |
76d7553f | 1794 | PERROR("kernel start consumer exec"); |
8c0faa1d DG |
1795 | } |
1796 | exit(EXIT_FAILURE); | |
1797 | } else if (pid > 0) { | |
1798 | ret = pid; | |
8c0faa1d | 1799 | } else { |
76d7553f | 1800 | PERROR("start consumer fork"); |
8c0faa1d | 1801 | ret = -errno; |
8c0faa1d | 1802 | } |
8f4905da | 1803 | error: |
8c0faa1d DG |
1804 | return ret; |
1805 | } | |
1806 | ||
693bd40b | 1807 | /* |
3bd1e081 | 1808 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 1809 | */ |
3bd1e081 | 1810 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b DG |
1811 | { |
1812 | int ret; | |
1813 | ||
3bd1e081 MD |
1814 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1815 | if (consumer_data->pid != 0) { | |
1816 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
1817 | goto end; |
1818 | } | |
693bd40b | 1819 | |
3bd1e081 | 1820 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 1821 | if (ret < 0) { |
3bd1e081 MD |
1822 | ERR("Spawning consumerd failed"); |
1823 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 1824 | goto error; |
693bd40b | 1825 | } |
c49dc785 | 1826 | |
3bd1e081 MD |
1827 | /* Setting up the consumer_data pid */ |
1828 | consumer_data->pid = ret; | |
48842b30 | 1829 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 1830 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 1831 | |
3bd1e081 MD |
1832 | DBG2("Spawning consumer control thread"); |
1833 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 1834 | if (ret < 0) { |
3bd1e081 | 1835 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
1836 | goto error; |
1837 | } | |
1838 | ||
c49dc785 | 1839 | end: |
693bd40b DG |
1840 | return 0; |
1841 | ||
1842 | error: | |
1843 | return ret; | |
1844 | } | |
1845 | ||
44a5e5eb | 1846 | /* |
139ac872 MD |
1847 | * Compute health status of each consumer. If one of them is zero (bad |
1848 | * state), we return 0. | |
44a5e5eb DG |
1849 | */ |
1850 | static int check_consumer_health(void) | |
1851 | { | |
1852 | int ret; | |
1853 | ||
139ac872 MD |
1854 | ret = health_check_state(&kconsumer_data.health) && |
1855 | health_check_state(&ustconsumer32_data.health) && | |
44a5e5eb DG |
1856 | health_check_state(&ustconsumer64_data.health); |
1857 | ||
1858 | DBG3("Health consumer check %d", ret); | |
1859 | ||
1860 | return ret; | |
1861 | } | |
1862 | ||
b73401da | 1863 | /* |
096102bd | 1864 | * Check version of the lttng-modules. |
b73401da | 1865 | */ |
096102bd | 1866 | static int validate_lttng_modules_version(void) |
b73401da | 1867 | { |
096102bd | 1868 | return kernel_validate_version(kernel_tracer_fd); |
ab147185 MD |
1869 | } |
1870 | ||
b73401da | 1871 | /* |
096102bd | 1872 | * Setup necessary data for kernel tracer action. |
b73401da | 1873 | */ |
096102bd | 1874 | static int init_kernel_tracer(void) |
b73401da DG |
1875 | { |
1876 | int ret; | |
b73401da | 1877 | |
096102bd DG |
1878 | /* Modprobe lttng kernel modules */ |
1879 | ret = modprobe_lttng_control(); | |
b73401da | 1880 | if (ret < 0) { |
b73401da DG |
1881 | goto error; |
1882 | } | |
1883 | ||
096102bd DG |
1884 | /* Open debugfs lttng */ |
1885 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
1886 | if (kernel_tracer_fd < 0) { | |
1887 | DBG("Failed to open %s", module_proc_lttng); | |
1888 | ret = -1; | |
1889 | goto error_open; | |
b73401da DG |
1890 | } |
1891 | ||
096102bd DG |
1892 | /* Validate kernel version */ |
1893 | ret = validate_lttng_modules_version(); | |
b73401da | 1894 | if (ret < 0) { |
096102bd | 1895 | goto error_version; |
b73401da DG |
1896 | } |
1897 | ||
096102bd | 1898 | ret = modprobe_lttng_data(); |
b73401da | 1899 | if (ret < 0) { |
096102bd | 1900 | goto error_modules; |
8c0faa1d DG |
1901 | } |
1902 | ||
f3ed775e | 1903 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
096102bd DG |
1904 | return 0; |
1905 | ||
1906 | error_version: | |
1907 | modprobe_remove_lttng_control(); | |
76d7553f MD |
1908 | ret = close(kernel_tracer_fd); |
1909 | if (ret) { | |
1910 | PERROR("close"); | |
1911 | } | |
1912 | kernel_tracer_fd = -1; | |
096102bd DG |
1913 | return LTTCOMM_KERN_VERSION; |
1914 | ||
1915 | error_modules: | |
76d7553f MD |
1916 | ret = close(kernel_tracer_fd); |
1917 | if (ret) { | |
1918 | PERROR("close"); | |
1919 | } | |
096102bd DG |
1920 | |
1921 | error_open: | |
1922 | modprobe_remove_lttng_control(); | |
b73401da DG |
1923 | |
1924 | error: | |
b73401da | 1925 | WARN("No kernel tracer available"); |
a4b35e07 | 1926 | kernel_tracer_fd = -1; |
531d29f9 MD |
1927 | if (!is_root) { |
1928 | return LTTCOMM_NEED_ROOT_SESSIOND; | |
1929 | } else { | |
1930 | return LTTCOMM_KERN_NA; | |
1931 | } | |
f3ed775e | 1932 | } |
33a2b854 | 1933 | |
f3ed775e | 1934 | /* |
54d01ffb | 1935 | * Init tracing by creating trace directory and sending fds kernel consumer. |
f3ed775e | 1936 | */ |
54d01ffb | 1937 | static int init_kernel_tracing(struct ltt_kernel_session *session) |
f3ed775e | 1938 | { |
f40799e8 | 1939 | int ret = 0; |
173af62f DG |
1940 | struct lttng_ht_iter iter; |
1941 | struct consumer_socket *socket; | |
8c0faa1d | 1942 | |
173af62f | 1943 | assert(session); |
d9800920 | 1944 | |
173af62f DG |
1945 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
1946 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
1947 | socket, node.node) { | |
1948 | /* Code flow error */ | |
1949 | assert(socket->fd >= 0); | |
1950 | ||
1951 | pthread_mutex_lock(socket->lock); | |
1952 | ret = kernel_consumer_send_session(socket->fd, session); | |
1953 | pthread_mutex_unlock(socket->lock); | |
1954 | if (ret < 0) { | |
1955 | ret = LTTCOMM_KERN_CONSUMER_FAIL; | |
1956 | goto error; | |
1957 | } | |
f3ed775e | 1958 | } |
00e2e675 | 1959 | } |
1d4b027a | 1960 | |
00e2e675 DG |
1961 | error: |
1962 | return ret; | |
1963 | } | |
1964 | ||
1965 | /* | |
1966 | * Create a socket to the relayd using the URI. | |
1967 | * | |
1968 | * On success, the relayd_sock pointer is set to the created socket. | |
1969 | * Else, it is untouched and an lttcomm error code is returned. | |
1970 | */ | |
1971 | static int create_connect_relayd(struct consumer_output *output, | |
1972 | const char *session_name, struct lttng_uri *uri, | |
1973 | struct lttcomm_sock **relayd_sock) | |
1974 | { | |
1975 | int ret; | |
1976 | struct lttcomm_sock *sock; | |
1977 | ||
1978 | /* Create socket object from URI */ | |
1979 | sock = lttcomm_alloc_sock_from_uri(uri); | |
1980 | if (sock == NULL) { | |
1981 | ret = LTTCOMM_FATAL; | |
1982 | goto error; | |
1983 | } | |
1984 | ||
1985 | ret = lttcomm_create_sock(sock); | |
1986 | if (ret < 0) { | |
1987 | ret = LTTCOMM_FATAL; | |
1988 | goto error; | |
1989 | } | |
1990 | ||
1991 | /* Connect to relayd so we can proceed with a session creation. */ | |
1992 | ret = relayd_connect(sock); | |
1993 | if (ret < 0) { | |
1994 | ERR("Unable to reach lttng-relayd"); | |
1995 | ret = LTTCOMM_RELAYD_SESSION_FAIL; | |
1996 | goto free_sock; | |
f3ed775e | 1997 | } |
1d4b027a | 1998 | |
00e2e675 DG |
1999 | /* Create socket for control stream. */ |
2000 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
2001 | DBG3("Creating relayd stream socket from URI"); | |
2002 | ||
2003 | /* Check relayd version */ | |
0a6b5085 DG |
2004 | ret = relayd_version_check(sock, RELAYD_VERSION_COMM_MAJOR, |
2005 | RELAYD_VERSION_COMM_MINOR); | |
00e2e675 DG |
2006 | if (ret < 0) { |
2007 | ret = LTTCOMM_RELAYD_VERSION_FAIL; | |
2008 | goto close_sock; | |
2009 | } | |
2010 | } else if (uri->stype == LTTNG_STREAM_DATA) { | |
2011 | DBG3("Creating relayd data socket from URI"); | |
2012 | } else { | |
2013 | /* Command is not valid */ | |
2014 | ERR("Relayd invalid stream type: %d", uri->stype); | |
2015 | ret = LTTCOMM_INVALID; | |
2016 | goto close_sock; | |
2017 | } | |
2018 | ||
2019 | *relayd_sock = sock; | |
2020 | ||
2021 | return LTTCOMM_OK; | |
2022 | ||
2023 | close_sock: | |
2024 | if (sock) { | |
2025 | (void) relayd_close(sock); | |
2026 | } | |
2027 | free_sock: | |
2028 | if (sock) { | |
2029 | lttcomm_destroy_sock(sock); | |
2030 | } | |
2031 | error: | |
2032 | return ret; | |
2033 | } | |
2034 | ||
2035 | /* | |
2036 | * Connect to the relayd using URI and send the socket to the right consumer. | |
2037 | */ | |
2038 | static int send_socket_relayd_consumer(int domain, struct ltt_session *session, | |
2039 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, | |
2040 | int consumer_fd) | |
2041 | { | |
2042 | int ret; | |
2043 | struct lttcomm_sock *sock = NULL; | |
2044 | ||
2045 | /* Set the network sequence index if not set. */ | |
2046 | if (consumer->net_seq_index == -1) { | |
2047 | /* | |
2048 | * Increment net_seq_idx because we are about to transfer the | |
2049 | * new relayd socket to the consumer. | |
2050 | */ | |
2051 | uatomic_inc(&relayd_net_seq_idx); | |
2052 | /* Assign unique key so the consumer can match streams */ | |
2053 | consumer->net_seq_index = uatomic_read(&relayd_net_seq_idx); | |
2054 | } | |
2055 | ||
2056 | /* Connect to relayd and make version check if uri is the control. */ | |
2057 | ret = create_connect_relayd(consumer, session->name, relayd_uri, &sock); | |
2058 | if (ret != LTTCOMM_OK) { | |
2059 | goto close_sock; | |
2060 | } | |
2061 | ||
2062 | /* If the control socket is connected, network session is ready */ | |
2063 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
2064 | session->net_handle = 1; | |
2065 | } | |
2066 | ||
37278a1e DG |
2067 | /* Send relayd socket to consumer. */ |
2068 | ret = consumer_send_relayd_socket(consumer_fd, sock, | |
2069 | consumer, relayd_uri->stype); | |
2070 | if (ret < 0) { | |
2071 | ret = LTTCOMM_ENABLE_CONSUMER_FAIL; | |
2072 | goto close_sock; | |
00e2e675 DG |
2073 | } |
2074 | ||
2075 | ret = LTTCOMM_OK; | |
2076 | ||
2077 | /* | |
2078 | * Close socket which was dup on the consumer side. The session daemon does | |
2079 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
2080 | */ | |
2081 | ||
2082 | close_sock: | |
2083 | if (sock) { | |
2084 | (void) relayd_close(sock); | |
2085 | lttcomm_destroy_sock(sock); | |
2086 | } | |
2087 | ||
2088 | return ret; | |
2089 | } | |
2090 | ||
2091 | /* | |
2092 | * Send both relayd sockets to a specific consumer and domain. This is a | |
2093 | * helper function to facilitate sending the information to the consumer for a | |
2094 | * session. | |
2095 | */ | |
2096 | static int send_sockets_relayd_consumer(int domain, | |
2097 | struct ltt_session *session, struct consumer_output *consumer, int fd) | |
2098 | { | |
2099 | int ret; | |
2100 | ||
3f8e211f DG |
2101 | assert(session); |
2102 | assert(consumer); | |
2103 | ||
2104 | /* Don't resend the sockets to the consumer. */ | |
2105 | if (consumer->dst.net.relayd_socks_sent) { | |
2106 | ret = LTTCOMM_OK; | |
2107 | goto error; | |
2108 | } | |
2109 | ||
00e2e675 DG |
2110 | /* Sending control relayd socket. */ |
2111 | ret = send_socket_relayd_consumer(domain, session, | |
2112 | &consumer->dst.net.control, consumer, fd); | |
2113 | if (ret != LTTCOMM_OK) { | |
2114 | goto error; | |
2115 | } | |
2116 | ||
2117 | /* Sending data relayd socket. */ | |
2118 | ret = send_socket_relayd_consumer(domain, session, | |
2119 | &consumer->dst.net.data, consumer, fd); | |
2120 | if (ret != LTTCOMM_OK) { | |
2121 | goto error; | |
2122 | } | |
2123 | ||
3f8e211f DG |
2124 | /* Flag that all relayd sockets were sent to the consumer. */ |
2125 | consumer->dst.net.relayd_socks_sent = 1; | |
2126 | ||
00e2e675 DG |
2127 | error: |
2128 | return ret; | |
2129 | } | |
2130 | ||
2131 | /* | |
2132 | * Setup relayd connections for a tracing session. First creates the socket to | |
2133 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
2134 | * network. | |
2135 | */ | |
2136 | static int setup_relayd(struct ltt_session *session) | |
2137 | { | |
2138 | int ret = LTTCOMM_OK; | |
2139 | struct ltt_ust_session *usess; | |
2140 | struct ltt_kernel_session *ksess; | |
173af62f DG |
2141 | struct consumer_socket *socket; |
2142 | struct lttng_ht_iter iter; | |
00e2e675 DG |
2143 | |
2144 | assert(session); | |
2145 | ||
2146 | usess = session->ust_session; | |
2147 | ksess = session->kernel_session; | |
2148 | ||
2149 | DBG2("Setting relayd for session %s", session->name); | |
2150 | ||
a4b92340 DG |
2151 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
2152 | && usess->consumer->enabled) { | |
173af62f DG |
2153 | /* For each consumer socket, send relayd sockets */ |
2154 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
2155 | socket, node.node) { | |
2156 | /* Code flow error */ | |
2157 | assert(socket->fd >= 0); | |
2158 | ||
2159 | pthread_mutex_lock(socket->lock); | |
00e2e675 | 2160 | send_sockets_relayd_consumer(LTTNG_DOMAIN_UST, session, |
173af62f DG |
2161 | usess->consumer, socket->fd); |
2162 | pthread_mutex_unlock(socket->lock); | |
00e2e675 DG |
2163 | if (ret != LTTCOMM_OK) { |
2164 | goto error; | |
2165 | } | |
2166 | } | |
a4b92340 DG |
2167 | } |
2168 | ||
2169 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
2170 | && ksess->consumer->enabled) { | |
173af62f DG |
2171 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, |
2172 | socket, node.node) { | |
2173 | /* Code flow error */ | |
2174 | assert(socket->fd >= 0); | |
2175 | ||
2176 | pthread_mutex_lock(socket->lock); | |
2177 | send_sockets_relayd_consumer(LTTNG_DOMAIN_KERNEL, session, | |
2178 | ksess->consumer, socket->fd); | |
2179 | pthread_mutex_unlock(socket->lock); | |
00e2e675 DG |
2180 | if (ret != LTTCOMM_OK) { |
2181 | goto error; | |
2182 | } | |
2183 | } | |
00e2e675 DG |
2184 | } |
2185 | ||
2186 | error: | |
2187 | return ret; | |
2188 | } | |
2189 | ||
07424f16 DG |
2190 | /* |
2191 | * Set consumer subdirectory using the session name and a generated datetime if | |
2192 | * needed. This is appended to the current subdirectory. | |
2193 | */ | |
2194 | static int set_consumer_subdir(struct consumer_output *consumer, | |
2195 | const char *session_name) | |
2196 | { | |
2197 | int ret = 0; | |
2198 | unsigned int have_default_name = 0; | |
2199 | char datetime[16], tmp_path[PATH_MAX]; | |
2200 | time_t rawtime; | |
2201 | struct tm *timeinfo; | |
2202 | ||
2203 | assert(consumer); | |
2204 | assert(session_name); | |
2205 | ||
2206 | memset(tmp_path, 0, sizeof(tmp_path)); | |
2207 | ||
2208 | /* Flag if we have a default session. */ | |
2209 | if (strncmp(session_name, DEFAULT_SESSION_NAME "-", | |
2210 | strlen(DEFAULT_SESSION_NAME) + 1) == 0) { | |
2211 | have_default_name = 1; | |
2212 | } else { | |
2213 | /* Get date and time for session path */ | |
2214 | time(&rawtime); | |
2215 | timeinfo = localtime(&rawtime); | |
2216 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
2217 | } | |
2218 | ||
2219 | if (have_default_name) { | |
2220 | ret = snprintf(tmp_path, sizeof(tmp_path), | |
2221 | "%s/%s", consumer->subdir, session_name); | |
2222 | } else { | |
2223 | ret = snprintf(tmp_path, sizeof(tmp_path), | |
2224 | "%s/%s-%s/", consumer->subdir, session_name, datetime); | |
2225 | } | |
2226 | if (ret < 0) { | |
2227 | PERROR("snprintf session name date"); | |
2228 | goto error; | |
2229 | } | |
2230 | ||
2231 | strncpy(consumer->subdir, tmp_path, sizeof(consumer->subdir)); | |
2232 | DBG2("Consumer subdir set to %s", consumer->subdir); | |
2233 | ||
2234 | error: | |
2235 | return ret; | |
2236 | } | |
2237 | ||
00e2e675 DG |
2238 | /* |
2239 | * Copy consumer output from the tracing session to the domain session. The | |
2240 | * function also applies the right modification on a per domain basis for the | |
2241 | * trace files destination directory. | |
2242 | */ | |
2243 | static int copy_session_consumer(int domain, struct ltt_session *session) | |
2244 | { | |
2245 | int ret; | |
2246 | const char *dir_name; | |
2247 | struct consumer_output *consumer; | |
2248 | ||
a4b92340 DG |
2249 | assert(session); |
2250 | assert(session->consumer); | |
2251 | ||
00e2e675 DG |
2252 | switch (domain) { |
2253 | case LTTNG_DOMAIN_KERNEL: | |
2254 | DBG3("Copying tracing session consumer output in kernel session"); | |
2255 | session->kernel_session->consumer = | |
2256 | consumer_copy_output(session->consumer); | |
2257 | /* Ease our life a bit for the next part */ | |
2258 | consumer = session->kernel_session->consumer; | |
2259 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
2260 | break; | |
2261 | case LTTNG_DOMAIN_UST: | |
2262 | DBG3("Copying tracing session consumer output in UST session"); | |
2263 | session->ust_session->consumer = | |
2264 | consumer_copy_output(session->consumer); | |
2265 | /* Ease our life a bit for the next part */ | |
2266 | consumer = session->ust_session->consumer; | |
2267 | dir_name = DEFAULT_UST_TRACE_DIR; | |
2268 | break; | |
2269 | default: | |
2270 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2271 | goto error; | |
2272 | } | |
2273 | ||
07424f16 DG |
2274 | ret = set_consumer_subdir(session->consumer, session->name); |
2275 | if (ret < 0) { | |
2276 | ret = LTTCOMM_FATAL; | |
2277 | goto error; | |
2278 | } | |
2279 | ||
00e2e675 DG |
2280 | /* Append correct directory to subdir */ |
2281 | strncat(consumer->subdir, dir_name, sizeof(consumer->subdir)); | |
2282 | DBG3("Copy session consumer subdir %s", consumer->subdir); | |
2283 | ||
00e2e675 DG |
2284 | ret = LTTCOMM_OK; |
2285 | ||
1d4b027a DG |
2286 | error: |
2287 | return ret; | |
8c0faa1d DG |
2288 | } |
2289 | ||
0177d773 DG |
2290 | /* |
2291 | * Create an UST session and add it to the session ust list. | |
2292 | */ | |
44d3bd01 | 2293 | static int create_ust_session(struct ltt_session *session, |
6df2e2c9 | 2294 | struct lttng_domain *domain) |
0177d773 | 2295 | { |
6df2e2c9 | 2296 | int ret; |
00e2e675 DG |
2297 | struct ltt_ust_session *lus = NULL; |
2298 | ||
2299 | assert(session); | |
a4b92340 | 2300 | assert(domain); |
00e2e675 | 2301 | assert(session->consumer); |
44d3bd01 DG |
2302 | |
2303 | switch (domain->type) { | |
48842b30 | 2304 | case LTTNG_DOMAIN_UST: |
44d3bd01 DG |
2305 | break; |
2306 | default: | |
00e2e675 | 2307 | ERR("Unknown UST domain on create session %d", domain->type); |
13384287 | 2308 | ret = LTTCOMM_UNKNOWN_DOMAIN; |
44d3bd01 DG |
2309 | goto error; |
2310 | } | |
0177d773 DG |
2311 | |
2312 | DBG("Creating UST session"); | |
2313 | ||
a991f516 | 2314 | lus = trace_ust_create_session(session->path, session->id, domain); |
0177d773 | 2315 | if (lus == NULL) { |
44d3bd01 | 2316 | ret = LTTCOMM_UST_SESS_FAIL; |
0177d773 DG |
2317 | goto error; |
2318 | } | |
2319 | ||
6df2e2c9 MD |
2320 | lus->uid = session->uid; |
2321 | lus->gid = session->gid; | |
f6a9efaa | 2322 | session->ust_session = lus; |
44d3bd01 | 2323 | |
00e2e675 DG |
2324 | /* Copy session output to the newly created UST session */ |
2325 | ret = copy_session_consumer(domain->type, session); | |
2326 | if (ret != LTTCOMM_OK) { | |
2327 | goto error; | |
2328 | } | |
2329 | ||
44d3bd01 | 2330 | return LTTCOMM_OK; |
0177d773 DG |
2331 | |
2332 | error: | |
2333 | free(lus); | |
00e2e675 | 2334 | session->ust_session = NULL; |
0177d773 DG |
2335 | return ret; |
2336 | } | |
2337 | ||
333f285e | 2338 | /* |
d063d709 | 2339 | * Create a kernel tracer session then create the default channel. |
333f285e | 2340 | */ |
6df2e2c9 | 2341 | static int create_kernel_session(struct ltt_session *session) |
333f285e | 2342 | { |
f3ed775e | 2343 | int ret; |
f3ed775e DG |
2344 | |
2345 | DBG("Creating kernel session"); | |
2346 | ||
2347 | ret = kernel_create_session(session, kernel_tracer_fd); | |
2348 | if (ret < 0) { | |
2349 | ret = LTTCOMM_KERN_SESS_FAIL; | |
2350 | goto error; | |
333f285e DG |
2351 | } |
2352 | ||
a4b92340 DG |
2353 | /* Code flow safety */ |
2354 | assert(session->kernel_session); | |
2355 | ||
00e2e675 DG |
2356 | /* Copy session output to the newly created Kernel session */ |
2357 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
2358 | if (ret != LTTCOMM_OK) { | |
2359 | goto error; | |
2360 | } | |
2361 | ||
2362 | /* Create directory(ies) on local filesystem. */ | |
a4b92340 DG |
2363 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && |
2364 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
00e2e675 DG |
2365 | ret = run_as_mkdir_recursive( |
2366 | session->kernel_session->consumer->dst.trace_path, | |
2367 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2368 | if (ret < 0) { | |
2369 | if (ret != -EEXIST) { | |
2370 | ERR("Trace directory creation error"); | |
2371 | goto error; | |
2372 | } | |
7a485870 DG |
2373 | } |
2374 | } | |
00e2e675 | 2375 | |
6df2e2c9 MD |
2376 | session->kernel_session->uid = session->uid; |
2377 | session->kernel_session->gid = session->gid; | |
7a485870 | 2378 | |
00e2e675 DG |
2379 | return LTTCOMM_OK; |
2380 | ||
f3ed775e | 2381 | error: |
00e2e675 DG |
2382 | trace_kernel_destroy_session(session->kernel_session); |
2383 | session->kernel_session = NULL; | |
f3ed775e | 2384 | return ret; |
333f285e DG |
2385 | } |
2386 | ||
8e0af1b4 | 2387 | /* |
c7704d57 DG |
2388 | * Check if the UID or GID match the session. Root user has access to all |
2389 | * sessions. | |
8e0af1b4 | 2390 | */ |
c7704d57 | 2391 | static int session_access_ok(struct ltt_session *session, uid_t uid, gid_t gid) |
8e0af1b4 | 2392 | { |
c7704d57 | 2393 | if (uid != session->uid && gid != session->gid && uid != 0) { |
8e0af1b4 MD |
2394 | return 0; |
2395 | } else { | |
2396 | return 1; | |
2397 | } | |
2398 | } | |
2399 | ||
00e2e675 DG |
2400 | /* |
2401 | * Count number of session permitted by uid/gid. | |
2402 | */ | |
8e0af1b4 MD |
2403 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) |
2404 | { | |
2405 | unsigned int i = 0; | |
2406 | struct ltt_session *session; | |
2407 | ||
2408 | DBG("Counting number of available session for UID %d GID %d", | |
2409 | uid, gid); | |
2410 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
2411 | /* | |
2412 | * Only list the sessions the user can control. | |
2413 | */ | |
2414 | if (!session_access_ok(session, uid, gid)) { | |
2415 | continue; | |
2416 | } | |
2417 | i++; | |
2418 | } | |
2419 | return i; | |
2420 | } | |
2421 | ||
ad20f474 DG |
2422 | /* |
2423 | * Create a session path used by list_lttng_sessions for the case that the | |
2424 | * session consumer is on the network. | |
2425 | */ | |
2426 | static int build_network_session_path(char *dst, size_t size, | |
2427 | struct ltt_session *session) | |
2428 | { | |
2429 | int ret, kdata_port, udata_port; | |
2430 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
2431 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
2432 | ||
2433 | assert(session); | |
2434 | assert(dst); | |
2435 | ||
2436 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
2437 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
2438 | ||
2439 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
2440 | ||
2441 | if (session->kernel_session && session->kernel_session->consumer) { | |
2442 | kuri = &session->kernel_session->consumer->dst.net.control; | |
2443 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
2444 | } | |
2445 | ||
2446 | if (session->ust_session && session->ust_session->consumer) { | |
2447 | uuri = &session->ust_session->consumer->dst.net.control; | |
2448 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
2449 | } | |
2450 | ||
2451 | if (uuri == NULL && kuri == NULL) { | |
2452 | uri = &session->consumer->dst.net.control; | |
2453 | kdata_port = session->consumer->dst.net.data.port; | |
2454 | } else if (kuri && uuri) { | |
2455 | ret = uri_compare(kuri, uuri); | |
2456 | if (ret) { | |
2457 | /* Not Equal */ | |
2458 | uri = kuri; | |
2459 | /* Build uuri URL string */ | |
2460 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
2461 | if (ret < 0) { | |
2462 | goto error; | |
2463 | } | |
2464 | } else { | |
2465 | uri = kuri; | |
2466 | } | |
2467 | } else if (kuri && uuri == NULL) { | |
2468 | uri = kuri; | |
2469 | } else if (uuri && kuri == NULL) { | |
2470 | uri = uuri; | |
2471 | } | |
2472 | ||
2473 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
2474 | if (ret < 0) { | |
2475 | goto error; | |
2476 | } | |
2477 | ||
2478 | if (strlen(tmp_uurl) > 0) { | |
2479 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", | |
2480 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
2481 | } else { | |
2482 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, kdata_port); | |
2483 | } | |
2484 | ||
2485 | error: | |
2486 | return ret; | |
2487 | } | |
2488 | ||
6c9cc2ab DG |
2489 | /* |
2490 | * Using the session list, filled a lttng_session array to send back to the | |
2491 | * client for session listing. | |
2492 | * | |
2493 | * The session list lock MUST be acquired before calling this function. Use | |
54d01ffb | 2494 | * session_lock_list() and session_unlock_list(). |
6c9cc2ab | 2495 | */ |
c7704d57 DG |
2496 | static void list_lttng_sessions(struct lttng_session *sessions, uid_t uid, |
2497 | gid_t gid) | |
6c9cc2ab | 2498 | { |
ad20f474 | 2499 | int ret; |
8e0af1b4 | 2500 | unsigned int i = 0; |
6c9cc2ab DG |
2501 | struct ltt_session *session; |
2502 | ||
8e0af1b4 MD |
2503 | DBG("Getting all available session for UID %d GID %d", |
2504 | uid, gid); | |
6c9cc2ab DG |
2505 | /* |
2506 | * Iterate over session list and append data after the control struct in | |
2507 | * the buffer. | |
2508 | */ | |
2509 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
8e0af1b4 MD |
2510 | /* |
2511 | * Only list the sessions the user can control. | |
2512 | */ | |
2513 | if (!session_access_ok(session, uid, gid)) { | |
2514 | continue; | |
2515 | } | |
ad20f474 | 2516 | |
6f636768 DG |
2517 | struct ltt_kernel_session *ksess = session->kernel_session; |
2518 | struct ltt_ust_session *usess = session->ust_session; | |
2519 | ||
2520 | if (session->consumer->type == CONSUMER_DST_NET || | |
2521 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2522 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
ad20f474 DG |
2523 | ret = build_network_session_path(sessions[i].path, |
2524 | sizeof(session[i].path), session); | |
6f636768 DG |
2525 | } else { |
2526 | ret = snprintf(sessions[i].path, sizeof(session[i].path), "%s", | |
2527 | session->consumer->dst.trace_path); | |
ad20f474 DG |
2528 | } |
2529 | if (ret < 0) { | |
2530 | PERROR("snprintf session path"); | |
2531 | continue; | |
2532 | } | |
2533 | ||
6c9cc2ab | 2534 | strncpy(sessions[i].name, session->name, NAME_MAX); |
99497cd0 | 2535 | sessions[i].name[NAME_MAX - 1] = '\0'; |
464dd62d | 2536 | sessions[i].enabled = session->enabled; |
6c9cc2ab DG |
2537 | i++; |
2538 | } | |
2539 | } | |
2540 | ||
9f19cc17 DG |
2541 | /* |
2542 | * Fill lttng_channel array of all channels. | |
2543 | */ | |
b551a063 | 2544 | static void list_lttng_channels(int domain, struct ltt_session *session, |
9f19cc17 DG |
2545 | struct lttng_channel *channels) |
2546 | { | |
2547 | int i = 0; | |
2548 | struct ltt_kernel_channel *kchan; | |
2549 | ||
2550 | DBG("Listing channels for session %s", session->name); | |
2551 | ||
b551a063 DG |
2552 | switch (domain) { |
2553 | case LTTNG_DOMAIN_KERNEL: | |
2554 | /* Kernel channels */ | |
2555 | if (session->kernel_session != NULL) { | |
2556 | cds_list_for_each_entry(kchan, | |
2557 | &session->kernel_session->channel_list.head, list) { | |
2558 | /* Copy lttng_channel struct to array */ | |
2559 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
2560 | channels[i].enabled = kchan->enabled; | |
2561 | i++; | |
2562 | } | |
2563 | } | |
2564 | break; | |
2565 | case LTTNG_DOMAIN_UST: | |
2566 | { | |
bec39940 | 2567 | struct lttng_ht_iter iter; |
b551a063 DG |
2568 | struct ltt_ust_channel *uchan; |
2569 | ||
bec39940 DG |
2570 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
2571 | &iter.iter, uchan, node.node) { | |
b551a063 DG |
2572 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); |
2573 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
2574 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
2575 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
2576 | channels[i].attr.switch_timer_interval = | |
2577 | uchan->attr.switch_timer_interval; | |
2578 | channels[i].attr.read_timer_interval = | |
2579 | uchan->attr.read_timer_interval; | |
aea829b3 | 2580 | channels[i].enabled = uchan->enabled; |
5edd7e09 DG |
2581 | switch (uchan->attr.output) { |
2582 | case LTTNG_UST_MMAP: | |
2583 | default: | |
2584 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
2585 | break; | |
2586 | } | |
befe0905 | 2587 | i++; |
b551a063 DG |
2588 | } |
2589 | break; | |
2590 | } | |
2591 | default: | |
2592 | break; | |
2593 | } | |
2594 | } | |
2595 | ||
2596 | /* | |
2597 | * Create a list of ust global domain events. | |
2598 | */ | |
2599 | static int list_lttng_ust_global_events(char *channel_name, | |
2600 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
2601 | { | |
2602 | int i = 0, ret = 0; | |
2603 | unsigned int nb_event = 0; | |
bec39940 DG |
2604 | struct lttng_ht_iter iter; |
2605 | struct lttng_ht_node_str *node; | |
b551a063 DG |
2606 | struct ltt_ust_channel *uchan; |
2607 | struct ltt_ust_event *uevent; | |
2608 | struct lttng_event *tmp; | |
2609 | ||
2610 | DBG("Listing UST global events for channel %s", channel_name); | |
2611 | ||
2612 | rcu_read_lock(); | |
2613 | ||
bec39940 DG |
2614 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); |
2615 | node = lttng_ht_iter_get_node_str(&iter); | |
d7b75b30 DG |
2616 | if (node == NULL) { |
2617 | ret = -LTTCOMM_UST_CHAN_NOT_FOUND; | |
2618 | goto error; | |
b551a063 DG |
2619 | } |
2620 | ||
bec39940 | 2621 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); |
d7b75b30 | 2622 | |
bec39940 | 2623 | nb_event += lttng_ht_get_count(uchan->events); |
d7b75b30 | 2624 | |
b551a063 DG |
2625 | if (nb_event == 0) { |
2626 | ret = nb_event; | |
2627 | goto error; | |
2628 | } | |
2629 | ||
2630 | DBG3("Listing UST global %d events", nb_event); | |
2631 | ||
2632 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
2633 | if (tmp == NULL) { | |
2634 | ret = -LTTCOMM_FATAL; | |
2635 | goto error; | |
2636 | } | |
2637 | ||
bec39940 | 2638 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
d7b75b30 DG |
2639 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); |
2640 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
2641 | tmp[i].enabled = uevent->enabled; | |
2642 | switch (uevent->attr.instrumentation) { | |
2643 | case LTTNG_UST_TRACEPOINT: | |
2644 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
2645 | break; | |
2646 | case LTTNG_UST_PROBE: | |
2647 | tmp[i].type = LTTNG_EVENT_PROBE; | |
2648 | break; | |
2649 | case LTTNG_UST_FUNCTION: | |
2650 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
2651 | break; | |
0cda4f28 | 2652 | } |
8005f29a | 2653 | tmp[i].loglevel = uevent->attr.loglevel; |
0cda4f28 | 2654 | switch (uevent->attr.loglevel_type) { |
8005f29a | 2655 | case LTTNG_UST_LOGLEVEL_ALL: |
22e25b71 | 2656 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
0cda4f28 | 2657 | break; |
8005f29a | 2658 | case LTTNG_UST_LOGLEVEL_RANGE: |
22e25b71 | 2659 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; |
8005f29a MD |
2660 | break; |
2661 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
22e25b71 | 2662 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; |
ac3bd9c0 | 2663 | break; |
9f19cc17 | 2664 | } |
fceb65df MD |
2665 | if (uevent->filter) { |
2666 | tmp[i].filter = 1; | |
2667 | } | |
d7b75b30 | 2668 | i++; |
9f19cc17 DG |
2669 | } |
2670 | ||
b551a063 DG |
2671 | ret = nb_event; |
2672 | *events = tmp; | |
2673 | ||
2674 | error: | |
2675 | rcu_read_unlock(); | |
2676 | return ret; | |
9f19cc17 DG |
2677 | } |
2678 | ||
2679 | /* | |
b551a063 | 2680 | * Fill lttng_event array of all kernel events in the channel. |
9f19cc17 | 2681 | */ |
b551a063 DG |
2682 | static int list_lttng_kernel_events(char *channel_name, |
2683 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
9f19cc17 | 2684 | { |
b551a063 DG |
2685 | int i = 0, ret; |
2686 | unsigned int nb_event; | |
9f19cc17 | 2687 | struct ltt_kernel_event *event; |
b551a063 DG |
2688 | struct ltt_kernel_channel *kchan; |
2689 | ||
2690 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
2691 | if (kchan == NULL) { | |
2692 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2693 | goto error; | |
2694 | } | |
2695 | ||
2696 | nb_event = kchan->event_count; | |
9f19cc17 DG |
2697 | |
2698 | DBG("Listing events for channel %s", kchan->channel->name); | |
2699 | ||
b551a063 DG |
2700 | if (nb_event == 0) { |
2701 | ret = nb_event; | |
2702 | goto error; | |
2703 | } | |
2704 | ||
2705 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
2706 | if (*events == NULL) { | |
2707 | ret = LTTCOMM_FATAL; | |
2708 | goto error; | |
2709 | } | |
2710 | ||
9f19cc17 DG |
2711 | /* Kernel channels */ |
2712 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
b551a063 DG |
2713 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); |
2714 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
2715 | (*events)[i].enabled = event->enabled; | |
9f19cc17 DG |
2716 | switch (event->event->instrumentation) { |
2717 | case LTTNG_KERNEL_TRACEPOINT: | |
b551a063 | 2718 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; |
9f19cc17 DG |
2719 | break; |
2720 | case LTTNG_KERNEL_KPROBE: | |
2721 | case LTTNG_KERNEL_KRETPROBE: | |
b551a063 DG |
2722 | (*events)[i].type = LTTNG_EVENT_PROBE; |
2723 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
9f19cc17 DG |
2724 | sizeof(struct lttng_kernel_kprobe)); |
2725 | break; | |
2726 | case LTTNG_KERNEL_FUNCTION: | |
b551a063 DG |
2727 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
2728 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
9f19cc17 DG |
2729 | sizeof(struct lttng_kernel_function)); |
2730 | break; | |
0133c199 | 2731 | case LTTNG_KERNEL_NOOP: |
b551a063 | 2732 | (*events)[i].type = LTTNG_EVENT_NOOP; |
0133c199 | 2733 | break; |
a54bd42d | 2734 | case LTTNG_KERNEL_SYSCALL: |
b551a063 | 2735 | (*events)[i].type = LTTNG_EVENT_SYSCALL; |
0133c199 | 2736 | break; |
7a3d1328 MD |
2737 | case LTTNG_KERNEL_ALL: |
2738 | assert(0); | |
2739 | break; | |
9f19cc17 DG |
2740 | } |
2741 | i++; | |
2742 | } | |
b551a063 DG |
2743 | |
2744 | return nb_event; | |
2745 | ||
2746 | error: | |
2747 | return ret; | |
9f19cc17 DG |
2748 | } |
2749 | ||
a4b92340 DG |
2750 | |
2751 | /* | |
2752 | * Add URI so the consumer output object. Set the correct path depending on the | |
2753 | * domain adding the default trace directory. | |
2754 | */ | |
2755 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
07424f16 | 2756 | struct lttng_uri *uri, int domain, const char *session_name) |
a4b92340 | 2757 | { |
07424f16 | 2758 | int ret = LTTCOMM_OK; |
a4b92340 DG |
2759 | const char *default_trace_dir; |
2760 | ||
2761 | assert(uri); | |
2762 | ||
2763 | if (consumer == NULL) { | |
2764 | DBG("No consumer detected. Don't add URI. Stopping."); | |
2765 | ret = LTTCOMM_NO_CONSUMER; | |
2766 | goto error; | |
2767 | } | |
2768 | ||
2769 | switch (domain) { | |
2770 | case LTTNG_DOMAIN_KERNEL: | |
2771 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
2772 | break; | |
2773 | case LTTNG_DOMAIN_UST: | |
2774 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
2775 | break; | |
2776 | default: | |
2777 | /* | |
2778 | * This case is possible is we try to add the URI to the global tracing | |
2779 | * session consumer object which in this case there is no subdir. | |
2780 | */ | |
2781 | default_trace_dir = ""; | |
2782 | } | |
2783 | ||
2784 | switch (uri->dtype) { | |
2785 | case LTTNG_DST_IPV4: | |
2786 | case LTTNG_DST_IPV6: | |
2787 | DBG2("Setting network URI to consumer"); | |
2788 | ||
2789 | /* Set URI into consumer output object */ | |
2790 | ret = consumer_set_network_uri(consumer, uri); | |
2791 | if (ret < 0) { | |
2792 | ret = LTTCOMM_FATAL; | |
2793 | goto error; | |
ad20f474 DG |
2794 | } else if (ret == 1) { |
2795 | /* | |
2796 | * URI was the same in the consumer so we do not append the subdir | |
2797 | * again so to not duplicate output dir. | |
2798 | */ | |
2799 | goto error; | |
a4b92340 DG |
2800 | } |
2801 | ||
07424f16 DG |
2802 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { |
2803 | ret = set_consumer_subdir(consumer, session_name); | |
2804 | if (ret < 0) { | |
2805 | ret = LTTCOMM_FATAL; | |
2806 | goto error; | |
2807 | } | |
2808 | } | |
2809 | ||
2810 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
2811 | /* On a new subdir, reappend the default trace dir. */ | |
2812 | strncat(consumer->subdir, default_trace_dir, sizeof(consumer->subdir)); | |
2813 | DBG3("Append domain trace name to subdir %s", consumer->subdir); | |
a4b92340 DG |
2814 | } |
2815 | ||
2816 | break; | |
2817 | case LTTNG_DST_PATH: | |
2818 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
2819 | memset(consumer->dst.trace_path, 0, | |
2820 | sizeof(consumer->dst.trace_path)); | |
2821 | strncpy(consumer->dst.trace_path, uri->dst.path, | |
2822 | sizeof(consumer->dst.trace_path)); | |
2823 | /* Append default trace dir */ | |
2824 | strncat(consumer->dst.trace_path, default_trace_dir, | |
2825 | sizeof(consumer->dst.trace_path)); | |
2826 | /* Flag consumer as local. */ | |
2827 | consumer->type = CONSUMER_DST_LOCAL; | |
2828 | break; | |
2829 | } | |
2830 | ||
2831 | error: | |
2832 | return ret; | |
2833 | } | |
2834 | ||
fac6795d | 2835 | /* |
54d01ffb | 2836 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. |
fac6795d | 2837 | */ |
54d01ffb DG |
2838 | static int cmd_disable_channel(struct ltt_session *session, |
2839 | int domain, char *channel_name) | |
fac6795d | 2840 | { |
54d01ffb | 2841 | int ret; |
78f0bacd DG |
2842 | struct ltt_ust_session *usess; |
2843 | ||
2844 | usess = session->ust_session; | |
379473d2 | 2845 | |
54d01ffb | 2846 | switch (domain) { |
78f0bacd DG |
2847 | case LTTNG_DOMAIN_KERNEL: |
2848 | { | |
2849 | ret = channel_kernel_disable(session->kernel_session, | |
2850 | channel_name); | |
2851 | if (ret != LTTCOMM_OK) { | |
2852 | goto error; | |
2853 | } | |
54d01ffb | 2854 | |
78f0bacd DG |
2855 | kernel_wait_quiescent(kernel_tracer_fd); |
2856 | break; | |
2857 | } | |
2858 | case LTTNG_DOMAIN_UST: | |
2859 | { | |
2860 | struct ltt_ust_channel *uchan; | |
bec39940 | 2861 | struct lttng_ht *chan_ht; |
78f0bacd | 2862 | |
7885e399 DG |
2863 | chan_ht = usess->domain_global.channels; |
2864 | ||
2865 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
78f0bacd DG |
2866 | if (uchan == NULL) { |
2867 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
54d01ffb | 2868 | goto error; |
78f0bacd DG |
2869 | } |
2870 | ||
7885e399 DG |
2871 | ret = channel_ust_disable(usess, domain, uchan); |
2872 | if (ret != LTTCOMM_OK) { | |
78f0bacd DG |
2873 | goto error; |
2874 | } | |
78f0bacd DG |
2875 | break; |
2876 | } | |
d78d6610 | 2877 | #if 0 |
78f0bacd DG |
2878 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: |
2879 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
2880 | case LTTNG_DOMAIN_UST_PID: | |
d78d6610 | 2881 | #endif |
78f0bacd DG |
2882 | default: |
2883 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2884 | goto error; | |
20fe2104 DG |
2885 | } |
2886 | ||
54d01ffb | 2887 | ret = LTTCOMM_OK; |
d65106b1 | 2888 | |
54d01ffb DG |
2889 | error: |
2890 | return ret; | |
2891 | } | |
2892 | ||
2893 | /* | |
2894 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
2895 | */ | |
44d3bd01 | 2896 | static int cmd_enable_channel(struct ltt_session *session, |
aea829b3 | 2897 | int domain, struct lttng_channel *attr) |
54d01ffb DG |
2898 | { |
2899 | int ret; | |
f6a9efaa | 2900 | struct ltt_ust_session *usess = session->ust_session; |
bec39940 | 2901 | struct lttng_ht *chan_ht; |
f6a9efaa | 2902 | |
5d56b5aa | 2903 | DBG("Enabling channel %s for session %s", attr->name, session->name); |
d65106b1 | 2904 | |
aea829b3 | 2905 | switch (domain) { |
44d3bd01 DG |
2906 | case LTTNG_DOMAIN_KERNEL: |
2907 | { | |
2908 | struct ltt_kernel_channel *kchan; | |
54d01ffb | 2909 | |
44d3bd01 DG |
2910 | kchan = trace_kernel_get_channel_by_name(attr->name, |
2911 | session->kernel_session); | |
2912 | if (kchan == NULL) { | |
2913 | ret = channel_kernel_create(session->kernel_session, | |
2914 | attr, kernel_poll_pipe[1]); | |
2915 | } else { | |
2916 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
2917 | } | |
2918 | ||
2919 | if (ret != LTTCOMM_OK) { | |
2920 | goto error; | |
2921 | } | |
2922 | ||
2923 | kernel_wait_quiescent(kernel_tracer_fd); | |
2924 | break; | |
2925 | } | |
f6a9efaa DG |
2926 | case LTTNG_DOMAIN_UST: |
2927 | { | |
2928 | struct ltt_ust_channel *uchan; | |
2929 | ||
7885e399 | 2930 | chan_ht = usess->domain_global.channels; |
f6a9efaa | 2931 | |
7885e399 | 2932 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); |
f6a9efaa | 2933 | if (uchan == NULL) { |
7885e399 | 2934 | ret = channel_ust_create(usess, domain, attr); |
f6a9efaa | 2935 | } else { |
7885e399 | 2936 | ret = channel_ust_enable(usess, domain, uchan); |
48842b30 | 2937 | } |
f6a9efaa DG |
2938 | break; |
2939 | } | |
d78d6610 | 2940 | #if 0 |
78f0bacd DG |
2941 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: |
2942 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
44d3bd01 | 2943 | case LTTNG_DOMAIN_UST_PID: |
d78d6610 | 2944 | #endif |
44d3bd01 DG |
2945 | default: |
2946 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2947 | goto error; | |
54d01ffb DG |
2948 | } |
2949 | ||
54d01ffb DG |
2950 | error: |
2951 | return ret; | |
2952 | } | |
2953 | ||
2954 | /* | |
2955 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
2956 | */ | |
2957 | static int cmd_disable_event(struct ltt_session *session, int domain, | |
2958 | char *channel_name, char *event_name) | |
2959 | { | |
2960 | int ret; | |
54d01ffb DG |
2961 | |
2962 | switch (domain) { | |
2963 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
2964 | { |
2965 | struct ltt_kernel_channel *kchan; | |
b0a40d28 | 2966 | struct ltt_kernel_session *ksess; |
2bdd86d4 | 2967 | |
b0a40d28 DG |
2968 | ksess = session->kernel_session; |
2969 | ||
2970 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
54d01ffb DG |
2971 | if (kchan == NULL) { |
2972 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2973 | goto error; | |
d65106b1 DG |
2974 | } |
2975 | ||
b0a40d28 | 2976 | ret = event_kernel_disable_tracepoint(ksess, kchan, event_name); |
54d01ffb DG |
2977 | if (ret != LTTCOMM_OK) { |
2978 | goto error; | |
2979 | } | |
2980 | ||
2981 | kernel_wait_quiescent(kernel_tracer_fd); | |
d65106b1 | 2982 | break; |
2bdd86d4 MD |
2983 | } |
2984 | case LTTNG_DOMAIN_UST: | |
b0a40d28 | 2985 | { |
b0a40d28 | 2986 | struct ltt_ust_channel *uchan; |
7f79d3a1 | 2987 | struct ltt_ust_session *usess; |
b0a40d28 DG |
2988 | |
2989 | usess = session->ust_session; | |
2990 | ||
2991 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2992 | channel_name); | |
2993 | if (uchan == NULL) { | |
2994 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
2995 | goto error; | |
2996 | } | |
2997 | ||
7f79d3a1 DG |
2998 | ret = event_ust_disable_tracepoint(usess, domain, uchan, event_name); |
2999 | if (ret != LTTCOMM_OK) { | |
b0a40d28 DG |
3000 | goto error; |
3001 | } | |
3002 | ||
7f79d3a1 | 3003 | DBG3("Disable UST event %s in channel %s completed", event_name, |
b0a40d28 | 3004 | channel_name); |
b0a40d28 DG |
3005 | break; |
3006 | } | |
d78d6610 | 3007 | #if 0 |
2bdd86d4 MD |
3008 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
3009 | case LTTNG_DOMAIN_UST_PID: | |
3010 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 3011 | #endif |
54d01ffb | 3012 | default: |
1ab1ea0b | 3013 | ret = LTTCOMM_UND; |
54d01ffb | 3014 | goto error; |
d65106b1 | 3015 | } |
26cc6b4e | 3016 | |
54d01ffb DG |
3017 | ret = LTTCOMM_OK; |
3018 | ||
3019 | error: | |
3020 | return ret; | |
3021 | } | |
3022 | ||
3023 | /* | |
3024 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
3025 | */ | |
3026 | static int cmd_disable_event_all(struct ltt_session *session, int domain, | |
3027 | char *channel_name) | |
3028 | { | |
3029 | int ret; | |
54d01ffb DG |
3030 | |
3031 | switch (domain) { | |
3032 | case LTTNG_DOMAIN_KERNEL: | |
9730260e DG |
3033 | { |
3034 | struct ltt_kernel_session *ksess; | |
3035 | struct ltt_kernel_channel *kchan; | |
3036 | ||
3037 | ksess = session->kernel_session; | |
3038 | ||
3039 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
54d01ffb DG |
3040 | if (kchan == NULL) { |
3041 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
3042 | goto error; | |
26cc6b4e DG |
3043 | } |
3044 | ||
9730260e | 3045 | ret = event_kernel_disable_all(ksess, kchan); |
54d01ffb | 3046 | if (ret != LTTCOMM_OK) { |
0b97ec54 | 3047 | goto error; |
26cc6b4e DG |
3048 | } |
3049 | ||
54d01ffb | 3050 | kernel_wait_quiescent(kernel_tracer_fd); |
26cc6b4e | 3051 | break; |
9730260e DG |
3052 | } |
3053 | case LTTNG_DOMAIN_UST: | |
3054 | { | |
3055 | struct ltt_ust_session *usess; | |
3056 | struct ltt_ust_channel *uchan; | |
3057 | ||
3058 | usess = session->ust_session; | |
3059 | ||
3060 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
3061 | channel_name); | |
3062 | if (uchan == NULL) { | |
3063 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
3064 | goto error; | |
3065 | } | |
3066 | ||
7f79d3a1 DG |
3067 | ret = event_ust_disable_all_tracepoints(usess, domain, uchan); |
3068 | if (ret != 0) { | |
9730260e DG |
3069 | goto error; |
3070 | } | |
3071 | ||
7f79d3a1 | 3072 | DBG3("Disable all UST events in channel %s completed", channel_name); |
9730260e DG |
3073 | |
3074 | break; | |
3075 | } | |
d78d6610 | 3076 | #if 0 |
9730260e DG |
3077 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
3078 | case LTTNG_DOMAIN_UST_PID: | |
3079 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 3080 | #endif |
54d01ffb | 3081 | default: |
1ab1ea0b | 3082 | ret = LTTCOMM_UND; |
54d01ffb | 3083 | goto error; |
26cc6b4e | 3084 | } |
e953ef25 | 3085 | |
54d01ffb | 3086 | ret = LTTCOMM_OK; |
e953ef25 | 3087 | |
54d01ffb DG |
3088 | error: |
3089 | return ret; | |
3090 | } | |
f5177a38 | 3091 | |
54d01ffb DG |
3092 | /* |
3093 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
3094 | */ | |
3095 | static int cmd_add_context(struct ltt_session *session, int domain, | |
3096 | char *channel_name, char *event_name, struct lttng_event_context *ctx) | |
3097 | { | |
3098 | int ret; | |
f5177a38 | 3099 | |
54d01ffb DG |
3100 | switch (domain) { |
3101 | case LTTNG_DOMAIN_KERNEL: | |
3102 | /* Add kernel context to kernel tracer */ | |
3103 | ret = context_kernel_add(session->kernel_session, ctx, | |
3104 | event_name, channel_name); | |
3105 | if (ret != LTTCOMM_OK) { | |
f5177a38 | 3106 | goto error; |
e953ef25 | 3107 | } |
2bdd86d4 MD |
3108 | break; |
3109 | case LTTNG_DOMAIN_UST: | |
3110 | { | |
55cc08a6 | 3111 | struct ltt_ust_session *usess = session->ust_session; |
e953ef25 | 3112 | |
55cc08a6 DG |
3113 | ret = context_ust_add(usess, domain, ctx, event_name, channel_name); |
3114 | if (ret != LTTCOMM_OK) { | |
3115 | goto error; | |
2bdd86d4 | 3116 | } |
e953ef25 | 3117 | break; |
2bdd86d4 | 3118 | } |
d78d6610 | 3119 | #if 0 |
55cc08a6 DG |
3120 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
3121 | case LTTNG_DOMAIN_UST_PID: | |
3122 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 3123 | #endif |
54d01ffb | 3124 | default: |
1ab1ea0b | 3125 | ret = LTTCOMM_UND; |
54d01ffb | 3126 | goto error; |
e953ef25 | 3127 | } |
950131af | 3128 | |
54d01ffb | 3129 | ret = LTTCOMM_OK; |
950131af | 3130 | |
54d01ffb DG |
3131 | error: |
3132 | return ret; | |
3133 | } | |
3134 | ||
53a80697 MD |
3135 | /* |
3136 | * Command LTTNG_SET_FILTER processed by the client thread. | |
3137 | */ | |
3138 | static int cmd_set_filter(struct ltt_session *session, int domain, | |
3139 | char *channel_name, char *event_name, | |
3140 | struct lttng_filter_bytecode *bytecode) | |
3141 | { | |
3142 | int ret; | |
3143 | ||
3144 | switch (domain) { | |
3145 | case LTTNG_DOMAIN_KERNEL: | |
3146 | ret = LTTCOMM_FATAL; | |
3147 | break; | |
3148 | case LTTNG_DOMAIN_UST: | |
3149 | { | |
3150 | struct ltt_ust_session *usess = session->ust_session; | |
3151 | ||
3152 | ret = filter_ust_set(usess, domain, bytecode, event_name, channel_name); | |
3153 | if (ret != LTTCOMM_OK) { | |
3154 | goto error; | |
3155 | } | |
3156 | break; | |
3157 | } | |
3158 | #if 0 | |
3159 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
3160 | case LTTNG_DOMAIN_UST_PID: | |
3161 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
3162 | #endif | |
3163 | default: | |
3164 | ret = LTTCOMM_UND; | |
3165 | goto error; | |
3166 | } | |
3167 | ||
3168 | ret = LTTCOMM_OK; | |
3169 | ||
3170 | error: | |
3171 | return ret; | |
3172 | ||
3173 | } | |
3174 | ||
54d01ffb DG |
3175 | /* |
3176 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
3177 | */ | |
3178 | static int cmd_enable_event(struct ltt_session *session, int domain, | |
3179 | char *channel_name, struct lttng_event *event) | |
3180 | { | |
3181 | int ret; | |
f6cd6b0f | 3182 | struct lttng_channel *attr; |
48842b30 | 3183 | struct ltt_ust_session *usess = session->ust_session; |
54d01ffb DG |
3184 | |
3185 | switch (domain) { | |
3186 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
3187 | { |
3188 | struct ltt_kernel_channel *kchan; | |
3189 | ||
54d01ffb DG |
3190 | kchan = trace_kernel_get_channel_by_name(channel_name, |
3191 | session->kernel_session); | |
3192 | if (kchan == NULL) { | |
f6cd6b0f DG |
3193 | attr = channel_new_default_attr(domain); |
3194 | if (attr == NULL) { | |
3195 | ret = LTTCOMM_FATAL; | |
3196 | goto error; | |
3197 | } | |
3198 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
3199 | ||
54d01ffb | 3200 | /* This call will notify the kernel thread */ |
44d3bd01 | 3201 | ret = channel_kernel_create(session->kernel_session, |
f6cd6b0f | 3202 | attr, kernel_poll_pipe[1]); |
54d01ffb | 3203 | if (ret != LTTCOMM_OK) { |
ff4d74e6 | 3204 | free(attr); |
f5177a38 DG |
3205 | goto error; |
3206 | } | |
ff4d74e6 | 3207 | free(attr); |
54d01ffb | 3208 | } |
950131af | 3209 | |
54d01ffb DG |
3210 | /* Get the newly created kernel channel pointer */ |
3211 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
3212 | session->kernel_session); | |
3213 | if (kchan == NULL) { | |
3214 | /* This sould not happen... */ | |
3215 | ret = LTTCOMM_FATAL; | |
3216 | goto error; | |
3217 | } | |
f5177a38 | 3218 | |
48842b30 DG |
3219 | ret = event_kernel_enable_tracepoint(session->kernel_session, kchan, |
3220 | event); | |
54d01ffb | 3221 | if (ret != LTTCOMM_OK) { |
f5177a38 | 3222 | goto error; |
950131af DG |
3223 | } |
3224 | ||
54d01ffb | 3225 | kernel_wait_quiescent(kernel_tracer_fd); |
950131af | 3226 | break; |
2bdd86d4 MD |
3227 | } |
3228 | case LTTNG_DOMAIN_UST: | |
3229 | { | |
aea829b3 | 3230 | struct lttng_channel *attr; |
edb67388 | 3231 | struct ltt_ust_channel *uchan; |
2bdd86d4 | 3232 | |
edb67388 | 3233 | /* Get channel from global UST domain */ |
48842b30 DG |
3234 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
3235 | channel_name); | |
3236 | if (uchan == NULL) { | |
aea829b3 DG |
3237 | /* Create default channel */ |
3238 | attr = channel_new_default_attr(domain); | |
3239 | if (attr == NULL) { | |
3240 | ret = LTTCOMM_FATAL; | |
3241 | goto error; | |
3242 | } | |
596219f7 | 3243 | snprintf(attr->name, NAME_MAX, "%s", channel_name); |
edb67388 | 3244 | attr->name[NAME_MAX - 1] = '\0'; |
aea829b3 | 3245 | |
7885e399 | 3246 | ret = channel_ust_create(usess, domain, attr); |
edb67388 | 3247 | if (ret != LTTCOMM_OK) { |
ff4d74e6 | 3248 | free(attr); |
aea829b3 DG |
3249 | goto error; |
3250 | } | |
aea829b3 DG |
3251 | free(attr); |
3252 | ||
3253 | /* Get the newly created channel reference back */ | |
3254 | uchan = trace_ust_find_channel_by_name( | |
3255 | usess->domain_global.channels, channel_name); | |
3256 | if (uchan == NULL) { | |
3257 | /* Something is really wrong */ | |
3258 | ret = LTTCOMM_FATAL; | |
3259 | goto error; | |
3260 | } | |
48842b30 | 3261 | } |
2bdd86d4 | 3262 | |
edb67388 | 3263 | /* At this point, the session and channel exist on the tracer */ |
edb67388 DG |
3264 | ret = event_ust_enable_tracepoint(usess, domain, uchan, event); |
3265 | if (ret != LTTCOMM_OK) { | |
48842b30 | 3266 | goto error; |
2bdd86d4 MD |
3267 | } |
3268 | break; | |
3269 | } | |
d78d6610 | 3270 | #if 0 |
2bdd86d4 MD |
3271 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
3272 | case LTTNG_DOMAIN_UST_PID: | |
3273 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 3274 | #endif |
54d01ffb | 3275 | default: |
1ab1ea0b | 3276 | ret = LTTCOMM_UND; |
54d01ffb | 3277 | goto error; |
950131af | 3278 | } |
d36b8583 | 3279 | |
54d01ffb | 3280 | ret = LTTCOMM_OK; |
d36b8583 | 3281 | |
54d01ffb DG |
3282 | error: |
3283 | return ret; | |
3284 | } | |
7d29a247 | 3285 | |
54d01ffb DG |
3286 | /* |
3287 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
3288 | */ | |
3289 | static int cmd_enable_event_all(struct ltt_session *session, int domain, | |
8c9ae521 | 3290 | char *channel_name, int event_type) |
54d01ffb DG |
3291 | { |
3292 | int ret; | |
3293 | struct ltt_kernel_channel *kchan; | |
7d29a247 | 3294 | |
54d01ffb DG |
3295 | switch (domain) { |
3296 | case LTTNG_DOMAIN_KERNEL: | |
3297 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
3298 | session->kernel_session); | |
3299 | if (kchan == NULL) { | |
3300 | /* This call will notify the kernel thread */ | |
44d3bd01 DG |
3301 | ret = channel_kernel_create(session->kernel_session, NULL, |
3302 | kernel_poll_pipe[1]); | |
54d01ffb DG |
3303 | if (ret != LTTCOMM_OK) { |
3304 | goto error; | |
d36b8583 | 3305 | } |
0d0c377a | 3306 | |
8f69e5eb DG |
3307 | /* Get the newly created kernel channel pointer */ |
3308 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
3309 | session->kernel_session); | |
3310 | if (kchan == NULL) { | |
3311 | /* This sould not happen... */ | |
3312 | ret = LTTCOMM_FATAL; | |
3313 | goto error; | |
3314 | } | |
3315 | ||
54d01ffb | 3316 | } |
0fdd1e2c | 3317 | |
7a3d1328 | 3318 | switch (event_type) { |
76d45b40 | 3319 | case LTTNG_EVENT_SYSCALL: |
7a3d1328 | 3320 | ret = event_kernel_enable_all_syscalls(session->kernel_session, |
8c9ae521 | 3321 | kchan, kernel_tracer_fd); |
7a3d1328 | 3322 | break; |
76d45b40 | 3323 | case LTTNG_EVENT_TRACEPOINT: |
8c9ae521 | 3324 | /* |
7a3d1328 MD |
3325 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and |
3326 | * events already registered to the channel. | |
8c9ae521 | 3327 | */ |
7a3d1328 MD |
3328 | ret = event_kernel_enable_all_tracepoints(session->kernel_session, |
3329 | kchan, kernel_tracer_fd); | |
3330 | break; | |
76d45b40 | 3331 | case LTTNG_EVENT_ALL: |
7a3d1328 | 3332 | /* Enable syscalls and tracepoints */ |
8c9ae521 DG |
3333 | ret = event_kernel_enable_all(session->kernel_session, |
3334 | kchan, kernel_tracer_fd); | |
7a3d1328 MD |
3335 | break; |
3336 | default: | |
3337 | ret = LTTCOMM_KERN_ENABLE_FAIL; | |
3338 | goto error; | |
8c9ae521 | 3339 | } |
8f69e5eb DG |
3340 | |
3341 | /* Manage return value */ | |
54d01ffb | 3342 | if (ret != LTTCOMM_OK) { |
0d0c377a | 3343 | goto error; |
d36b8583 DG |
3344 | } |
3345 | ||
54d01ffb | 3346 | kernel_wait_quiescent(kernel_tracer_fd); |
d36b8583 | 3347 | break; |
76d45b40 DG |
3348 | case LTTNG_DOMAIN_UST: |
3349 | { | |
3350 | struct lttng_channel *attr; | |
3351 | struct ltt_ust_channel *uchan; | |
3352 | struct ltt_ust_session *usess = session->ust_session; | |
3353 | ||
3354 | /* Get channel from global UST domain */ | |
3355 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
3356 | channel_name); | |
3357 | if (uchan == NULL) { | |
3358 | /* Create default channel */ | |
3359 | attr = channel_new_default_attr(domain); | |
3360 | if (attr == NULL) { | |
3361 | ret = LTTCOMM_FATAL; | |
3362 | goto error; | |
3363 | } | |
3364 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
3365 | attr->name[NAME_MAX - 1] = '\0'; | |
3366 | ||
3367 | /* Use the internal command enable channel */ | |
7885e399 | 3368 | ret = channel_ust_create(usess, domain, attr); |
76d45b40 DG |
3369 | if (ret != LTTCOMM_OK) { |
3370 | free(attr); | |
3371 | goto error; | |
3372 | } | |
3373 | free(attr); | |
3374 | ||
3375 | /* Get the newly created channel reference back */ | |
3376 | uchan = trace_ust_find_channel_by_name( | |
3377 | usess->domain_global.channels, channel_name); | |
3378 | if (uchan == NULL) { | |
3379 | /* Something is really wrong */ | |
3380 | ret = LTTCOMM_FATAL; | |
3381 | goto error; | |
3382 | } | |
3383 | } | |
3384 | ||
3385 | /* At this point, the session and channel exist on the tracer */ | |
3386 | ||
3387 | switch (event_type) { | |
3388 | case LTTNG_EVENT_ALL: | |
3389 | case LTTNG_EVENT_TRACEPOINT: | |
3390 | ret = event_ust_enable_all_tracepoints(usess, domain, uchan); | |
3391 | if (ret != LTTCOMM_OK) { | |
3392 | goto error; | |
3393 | } | |
3394 | break; | |
3395 | default: | |
3396 | ret = LTTCOMM_UST_ENABLE_FAIL; | |
3397 | goto error; | |
3398 | } | |
3399 | ||
3400 | /* Manage return value */ | |
3401 | if (ret != LTTCOMM_OK) { | |
3402 | goto error; | |
3403 | } | |
3404 | ||
3405 | break; | |
3406 | } | |
d78d6610 | 3407 | #if 0 |
76d45b40 DG |
3408 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
3409 | case LTTNG_DOMAIN_UST_PID: | |
3410 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 3411 | #endif |
54d01ffb | 3412 | default: |
1ab1ea0b | 3413 | ret = LTTCOMM_UND; |
54d01ffb | 3414 | goto error; |
d36b8583 | 3415 | } |
f3ed775e | 3416 | |
54d01ffb DG |
3417 | ret = LTTCOMM_OK; |
3418 | ||
3419 | error: | |
3420 | return ret; | |
3421 | } | |
3422 | ||
3423 | /* | |
3424 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
3425 | */ | |
3426 | static ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
3427 | { | |
3428 | int ret; | |
3429 | ssize_t nb_events = 0; | |
3430 | ||
3431 | switch (domain) { | |
3432 | case LTTNG_DOMAIN_KERNEL: | |
3433 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
3434 | if (nb_events < 0) { | |
3435 | ret = LTTCOMM_KERN_LIST_FAIL; | |
3436 | goto error; | |
894be886 | 3437 | } |
54d01ffb | 3438 | break; |
b551a063 DG |
3439 | case LTTNG_DOMAIN_UST: |
3440 | nb_events = ust_app_list_events(events); | |
3441 | if (nb_events < 0) { | |
3442 | ret = LTTCOMM_UST_LIST_FAIL; | |
3443 | goto error; | |
3444 | } | |
3445 | break; | |
54d01ffb | 3446 | default: |
1ab1ea0b | 3447 | ret = LTTCOMM_UND; |
54d01ffb DG |
3448 | goto error; |
3449 | } | |
894be886 | 3450 | |
54d01ffb | 3451 | return nb_events; |
7d29a247 | 3452 | |
54d01ffb DG |
3453 | error: |
3454 | /* Return negative value to differentiate return code */ | |
3455 | return -ret; | |
3456 | } | |
b389abbe | 3457 | |
f37d259d MD |
3458 | /* |
3459 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
3460 | */ | |
3461 | static ssize_t cmd_list_tracepoint_fields(int domain, | |
3462 | struct lttng_event_field **fields) | |
3463 | { | |
3464 | int ret; | |
3465 | ssize_t nb_fields = 0; | |
3466 | ||
3467 | switch (domain) { | |
3468 | case LTTNG_DOMAIN_UST: | |
3469 | nb_fields = ust_app_list_event_fields(fields); | |
3470 | if (nb_fields < 0) { | |
3471 | ret = LTTCOMM_UST_LIST_FAIL; | |
3472 | goto error; | |
3473 | } | |
3474 | break; | |
3475 | case LTTNG_DOMAIN_KERNEL: | |
3476 | default: /* fall-through */ | |
3477 | ret = LTTCOMM_UND; | |
3478 | goto error; | |
3479 | } | |
3480 | ||
3481 | return nb_fields; | |
3482 | ||
3483 | error: | |
3484 | /* Return negative value to differentiate return code */ | |
3485 | return -ret; | |
3486 | } | |
3487 | ||
54d01ffb DG |
3488 | /* |
3489 | * Command LTTNG_START_TRACE processed by the client thread. | |
3490 | */ | |
3491 | static int cmd_start_trace(struct ltt_session *session) | |
3492 | { | |
3493 | int ret; | |
54d01ffb | 3494 | struct ltt_kernel_session *ksession; |
b9d9b220 | 3495 | struct ltt_ust_session *usess; |
00e2e675 | 3496 | struct ltt_kernel_channel *kchan; |
b389abbe | 3497 | |
00e2e675 | 3498 | /* Ease our life a bit ;) */ |
54d01ffb | 3499 | ksession = session->kernel_session; |
b9d9b220 | 3500 | usess = session->ust_session; |
5eb91c98 | 3501 | |
b9ef1c83 | 3502 | if (session->enabled) { |
80e327fa DG |
3503 | /* Already started. */ |
3504 | ret = LTTCOMM_TRACE_ALREADY_STARTED; | |
b9ef1c83 DG |
3505 | goto error; |
3506 | } | |
3507 | ||
464dd62d MD |
3508 | session->enabled = 1; |
3509 | ||
00e2e675 DG |
3510 | ret = setup_relayd(session); |
3511 | if (ret != LTTCOMM_OK) { | |
3512 | ERR("Error setting up relayd for session %s", session->name); | |
3513 | goto error; | |
3514 | } | |
3515 | ||
54d01ffb DG |
3516 | /* Kernel tracing */ |
3517 | if (ksession != NULL) { | |
3518 | /* Open kernel metadata */ | |
3519 | if (ksession->metadata == NULL) { | |
a4b92340 | 3520 | ret = kernel_open_metadata(ksession); |
54d01ffb DG |
3521 | if (ret < 0) { |
3522 | ret = LTTCOMM_KERN_META_FAIL; | |
3523 | goto error; | |
b389abbe | 3524 | } |
54d01ffb | 3525 | } |
7d29a247 | 3526 | |
54d01ffb | 3527 | /* Open kernel metadata stream */ |
03550b58 | 3528 | if (ksession->metadata_stream_fd < 0) { |
54d01ffb DG |
3529 | ret = kernel_open_metadata_stream(ksession); |
3530 | if (ret < 0) { | |
3531 | ERR("Kernel create metadata stream failed"); | |
3532 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
3533 | goto error; | |
3534 | } | |
3535 | } | |
3536 | ||
3537 | /* For each channel */ | |
3538 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
3539 | if (kchan->stream_count == 0) { | |
3540 | ret = kernel_open_channel_stream(kchan); | |
3541 | if (ret < 0) { | |
3542 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
7d29a247 DG |
3543 | goto error; |
3544 | } | |
54d01ffb DG |
3545 | /* Update the stream global counter */ |
3546 | ksession->stream_count_global += ret; | |
7d29a247 | 3547 | } |
54d01ffb DG |
3548 | } |
3549 | ||
3550 | /* Setup kernel consumer socket and send fds to it */ | |
3551 | ret = init_kernel_tracing(ksession); | |
3552 | if (ret < 0) { | |
3553 | ret = LTTCOMM_KERN_START_FAIL; | |
3554 | goto error; | |
3555 | } | |
3556 | ||
3557 | /* This start the kernel tracing */ | |
3558 | ret = kernel_start_session(ksession); | |
3559 | if (ret < 0) { | |
3560 | ret = LTTCOMM_KERN_START_FAIL; | |
3561 | goto error; | |
3562 | } | |
3563 | ||
3564 | /* Quiescent wait after starting trace */ | |
3565 | kernel_wait_quiescent(kernel_tracer_fd); | |
3566 | } | |
3567 | ||
36dc12cc | 3568 | /* Flag session that trace should start automatically */ |
b9d9b220 DG |
3569 | if (usess) { |
3570 | usess->start_trace = 1; | |
36dc12cc | 3571 | |
b9d9b220 DG |
3572 | ret = ust_app_start_trace_all(usess); |
3573 | if (ret < 0) { | |
3574 | ret = LTTCOMM_UST_START_FAIL; | |
3575 | goto error; | |
3576 | } | |
2bdd86d4 | 3577 | } |
54d01ffb DG |
3578 | |
3579 | ret = LTTCOMM_OK; | |
3580 | ||
3581 | error: | |
3582 | return ret; | |
3583 | } | |
3584 | ||
3585 | /* | |
3586 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
3587 | */ | |
3588 | static int cmd_stop_trace(struct ltt_session *session) | |
3589 | { | |
3590 | int ret; | |
3591 | struct ltt_kernel_channel *kchan; | |
3592 | struct ltt_kernel_session *ksession; | |
8be98f9a | 3593 | struct ltt_ust_session *usess; |
54d01ffb DG |
3594 | |
3595 | /* Short cut */ | |
3596 | ksession = session->kernel_session; | |
8be98f9a | 3597 | usess = session->ust_session; |
54d01ffb | 3598 | |
b9ef1c83 | 3599 | if (!session->enabled) { |
80e327fa | 3600 | ret = LTTCOMM_TRACE_ALREADY_STOPPED; |
b9ef1c83 DG |
3601 | goto error; |
3602 | } | |
3603 | ||
464dd62d MD |
3604 | session->enabled = 0; |
3605 | ||
54d01ffb DG |
3606 | /* Kernel tracer */ |
3607 | if (ksession != NULL) { | |
3608 | DBG("Stop kernel tracing"); | |
3609 | ||
00e2e675 DG |
3610 | /* Flush metadata if exist */ |
3611 | if (ksession->metadata_stream_fd >= 0) { | |
3612 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
3613 | if (ret < 0) { | |
3614 | ERR("Kernel metadata flush failed"); | |
3615 | } | |
54d01ffb | 3616 | } |
f34daff7 | 3617 | |
00e2e675 | 3618 | /* Flush all buffers before stopping */ |
54d01ffb DG |
3619 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { |
3620 | ret = kernel_flush_buffer(kchan); | |
0d0c377a | 3621 | if (ret < 0) { |
54d01ffb | 3622 | ERR("Kernel flush buffer error"); |
7d29a247 | 3623 | } |
54d01ffb | 3624 | } |
19e70852 | 3625 | |
54d01ffb DG |
3626 | ret = kernel_stop_session(ksession); |
3627 | if (ret < 0) { | |
3628 | ret = LTTCOMM_KERN_STOP_FAIL; | |
19e70852 | 3629 | goto error; |
f3ed775e | 3630 | } |
54d01ffb DG |
3631 | |
3632 | kernel_wait_quiescent(kernel_tracer_fd); | |
894be886 | 3633 | } |
54d01ffb | 3634 | |
8be98f9a MD |
3635 | if (usess) { |
3636 | usess->start_trace = 0; | |
2bdd86d4 | 3637 | |
8be98f9a | 3638 | ret = ust_app_stop_trace_all(usess); |
2bdd86d4 | 3639 | if (ret < 0) { |
190df5ac | 3640 | ret = LTTCOMM_UST_STOP_FAIL; |
2bdd86d4 MD |
3641 | goto error; |
3642 | } | |
2bdd86d4 | 3643 | } |
54d01ffb DG |
3644 | |
3645 | ret = LTTCOMM_OK; | |
3646 | ||
3647 | error: | |
3648 | return ret; | |
3649 | } | |
3650 | ||
3651 | /* | |
07424f16 | 3652 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. |
54d01ffb | 3653 | */ |
07424f16 DG |
3654 | static int cmd_set_consumer_uri(int domain, struct ltt_session *session, |
3655 | size_t nb_uri, struct lttng_uri *uris) | |
54d01ffb | 3656 | { |
07424f16 DG |
3657 | int ret, i; |
3658 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3659 | struct ltt_ust_session *usess = session->ust_session; | |
a4b92340 | 3660 | struct consumer_output *consumer = NULL; |
a4b92340 | 3661 | |
07424f16 DG |
3662 | assert(session); |
3663 | assert(uris); | |
3664 | assert(nb_uri > 0); | |
00e2e675 | 3665 | |
07424f16 DG |
3666 | /* Can't enable consumer after session started. */ |
3667 | if (session->enabled) { | |
3668 | ret = LTTCOMM_TRACE_ALREADY_STARTED; | |
3669 | goto error; | |
a4b92340 DG |
3670 | } |
3671 | ||
07424f16 DG |
3672 | if (!session->start_consumer) { |
3673 | ret = LTTCOMM_NO_CONSUMER; | |
00e2e675 DG |
3674 | goto error; |
3675 | } | |
a4b92340 DG |
3676 | |
3677 | /* | |
07424f16 DG |
3678 | * This case switch makes sure the domain session has a temporary consumer |
3679 | * so the URL can be set. | |
a4b92340 | 3680 | */ |
07424f16 DG |
3681 | switch (domain) { |
3682 | case 0: | |
3683 | /* Code flow error. A session MUST always have a consumer object */ | |
3684 | assert(session->consumer); | |
a4b92340 | 3685 | /* |
07424f16 DG |
3686 | * The URL will be added to the tracing session consumer instead of a |
3687 | * specific domain consumer. | |
a4b92340 | 3688 | */ |
07424f16 DG |
3689 | consumer = session->consumer; |
3690 | break; | |
3691 | case LTTNG_DOMAIN_KERNEL: | |
3692 | /* Code flow error if we don't have a kernel session here. */ | |
3693 | assert(ksess); | |
a4b92340 | 3694 | |
07424f16 DG |
3695 | /* Create consumer output if none exists */ |
3696 | consumer = ksess->tmp_consumer; | |
3697 | if (consumer == NULL) { | |
3698 | consumer = consumer_copy_output(ksess->consumer); | |
3699 | if (consumer == NULL) { | |
3700 | ret = LTTCOMM_FATAL; | |
3701 | goto error; | |
3702 | } | |
3703 | /* Trash the consumer subdir, we are about to set a new one. */ | |
3704 | memset(consumer->subdir, 0, sizeof(consumer->subdir)); | |
3705 | ksess->tmp_consumer = consumer; | |
3706 | } | |
a4b92340 | 3707 | |
07424f16 DG |
3708 | break; |
3709 | case LTTNG_DOMAIN_UST: | |
3710 | /* Code flow error if we don't have a kernel session here. */ | |
3711 | assert(usess); | |
a4b92340 | 3712 | |
07424f16 DG |
3713 | /* Create consumer output if none exists */ |
3714 | consumer = usess->tmp_consumer; | |
3715 | if (consumer == NULL) { | |
3716 | consumer = consumer_copy_output(usess->consumer); | |
3717 | if (consumer == NULL) { | |
3718 | ret = LTTCOMM_FATAL; | |
3719 | goto error; | |
3720 | } | |
3721 | /* Trash the consumer subdir, we are about to set a new one. */ | |
3722 | memset(consumer->subdir, 0, sizeof(consumer->subdir)); | |
3723 | usess->tmp_consumer = consumer; | |
3724 | } | |
3725 | ||
3726 | break; | |
a4b92340 | 3727 | } |
00e2e675 | 3728 | |
07424f16 DG |
3729 | for (i = 0; i < nb_uri; i++) { |
3730 | struct consumer_socket *socket; | |
3731 | struct lttng_ht_iter iter; | |
a4b92340 | 3732 | |
07424f16 | 3733 | ret = add_uri_to_consumer(consumer, &uris[i], domain, session->name); |
00e2e675 | 3734 | if (ret < 0) { |
00e2e675 DG |
3735 | goto error; |
3736 | } | |
3737 | ||
07424f16 DG |
3738 | /* |
3739 | * Don't send relayd socket if URI is NOT remote or if the relayd | |
3740 | * sockets for the session are already sent. | |
3741 | */ | |
3742 | if (uris[i].dtype == LTTNG_DST_PATH || | |
3743 | consumer->dst.net.relayd_socks_sent) { | |
3744 | continue; | |
00e2e675 DG |
3745 | } |
3746 | ||
07424f16 DG |
3747 | /* Try to send relayd URI to the consumer if exist. */ |
3748 | cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, | |
3749 | socket, node.node) { | |
3750 | ||
3751 | /* A socket in the HT should never have a negative fd */ | |
3752 | assert(socket->fd >= 0); | |
3753 | ||
3754 | pthread_mutex_lock(socket->lock); | |
3755 | ret = send_socket_relayd_consumer(domain, session, &uris[i], | |
3756 | consumer, socket->fd); | |
3757 | pthread_mutex_unlock(socket->lock); | |
3758 | if (ret != LTTCOMM_OK) { | |
3759 | goto error; | |
3760 | } | |
3761 | } | |
00e2e675 DG |
3762 | } |
3763 | ||
07424f16 DG |
3764 | /* All good! */ |
3765 | ret = LTTCOMM_OK; | |
3766 | ||
3767 | error: | |
3768 | return ret; | |
3769 | } | |
3770 | ||
3771 | ||
3772 | /* | |
3773 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
3774 | */ | |
3775 | static int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
3776 | size_t nb_uri, lttng_sock_cred *creds) | |
3777 | { | |
3778 | int ret; | |
3779 | char *path = NULL; | |
3780 | struct ltt_session *session; | |
07424f16 DG |
3781 | |
3782 | assert(name); | |
3783 | ||
3784 | /* | |
3785 | * Verify if the session already exist | |
3786 | * | |
3787 | * XXX: There is no need for the session lock list here since the caller | |
3788 | * (process_client_msg) is holding it. We might want to change that so a | |
3789 | * single command does not lock the entire session list. | |
3790 | */ | |
3791 | session = session_find_by_name(name); | |
3792 | if (session != NULL) { | |
3793 | ret = LTTCOMM_EXIST_SESS; | |
3794 | goto find_error; | |
3795 | } | |
54d01ffb | 3796 | |
a4b92340 | 3797 | /* Create tracing session in the registry */ |
730389d9 DG |
3798 | ret = session_create(name, path, LTTNG_SOCK_GET_UID_CRED(creds), |
3799 | LTTNG_SOCK_GET_GID_CRED(creds)); | |
54d01ffb | 3800 | if (ret != LTTCOMM_OK) { |
07424f16 | 3801 | goto session_error; |
54d01ffb DG |
3802 | } |
3803 | ||
a4b92340 DG |
3804 | /* |
3805 | * Get the newly created session pointer back | |
3806 | * | |
3807 | * XXX: There is no need for the session lock list here since the caller | |
3808 | * (process_client_msg) is holding it. We might want to change that so a | |
3809 | * single command does not lock the entire session list. | |
3810 | */ | |
00e2e675 DG |
3811 | session = session_find_by_name(name); |
3812 | assert(session); | |
3813 | ||
07424f16 DG |
3814 | /* Create default consumer output for the session not yet created. */ |
3815 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
3816 | if (session->consumer == NULL) { | |
3817 | ret = LTTCOMM_FATAL; | |
3818 | goto consumer_error; | |
3819 | } | |
00e2e675 | 3820 | |
07424f16 DG |
3821 | /* |
3822 | * This means that the lttng_create_session call was called with the _path_ | |
3823 | * argument set to NULL. | |
3824 | */ | |
3825 | if (uris == NULL) { | |
3826 | /* | |
3827 | * At this point, we'll skip the consumer URI setup and create a | |
3828 | * session with a NULL path which will flag the session to NOT spawn a | |
3829 | * consumer. | |
3830 | */ | |
3831 | DBG("Create session %s with NO uri, skipping consumer setup", name); | |
3832 | goto end; | |
a4b92340 | 3833 | } |
07424f16 DG |
3834 | |
3835 | session->start_consumer = 1; | |
3836 | ||
3837 | ret = cmd_set_consumer_uri(0, session, nb_uri, uris); | |
3838 | if (ret != LTTCOMM_OK) { | |
3839 | goto consumer_error; | |
00e2e675 | 3840 | } |
54d01ffb | 3841 | |
07424f16 DG |
3842 | session->consumer->enabled = 1; |
3843 | ||
3844 | end: | |
a4b92340 DG |
3845 | return LTTCOMM_OK; |
3846 | ||
a4b92340 | 3847 | consumer_error: |
07424f16 DG |
3848 | session_destroy(session); |
3849 | session_error: | |
3850 | find_error: | |
54d01ffb DG |
3851 | return ret; |
3852 | } | |
3853 | ||
3854 | /* | |
3855 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
3856 | */ | |
3857 | static int cmd_destroy_session(struct ltt_session *session, char *name) | |
3858 | { | |
3859 | int ret; | |
3860 | ||
173af62f DG |
3861 | /* Safety net */ |
3862 | assert(session); | |
3863 | ||
54d01ffb DG |
3864 | /* Clean kernel session teardown */ |
3865 | teardown_kernel_session(session); | |
84cd17c6 MD |
3866 | /* UST session teardown */ |
3867 | teardown_ust_session(session); | |
54d01ffb DG |
3868 | |
3869 | /* | |
3870 | * Must notify the kernel thread here to update it's poll setin order | |
3871 | * to remove the channel(s)' fd just destroyed. | |
3872 | */ | |
3873 | ret = notify_thread_pipe(kernel_poll_pipe[1]); | |
3874 | if (ret < 0) { | |
76d7553f | 3875 | PERROR("write kernel poll pipe"); |
54d01ffb DG |
3876 | } |
3877 | ||
271933a4 | 3878 | ret = session_destroy(session); |
54d01ffb DG |
3879 | |
3880 | return ret; | |
3881 | } | |
3882 | ||
3883 | /* | |
3884 | * Command LTTNG_CALIBRATE processed by the client thread. | |
3885 | */ | |
3886 | static int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
3887 | { | |
3888 | int ret; | |
3889 | ||
3890 | switch (domain) { | |
3891 | case LTTNG_DOMAIN_KERNEL: | |
33a2b854 | 3892 | { |
54d01ffb | 3893 | struct lttng_kernel_calibrate kcalibrate; |
33a2b854 | 3894 | |
54d01ffb DG |
3895 | kcalibrate.type = calibrate->type; |
3896 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
33a2b854 | 3897 | if (ret < 0) { |
54d01ffb DG |
3898 | ret = LTTCOMM_KERN_ENABLE_FAIL; |
3899 | goto error; | |
33a2b854 | 3900 | } |
54d01ffb DG |
3901 | break; |
3902 | } | |
4466912f DG |
3903 | case LTTNG_DOMAIN_UST: |
3904 | { | |
3905 | struct lttng_ust_calibrate ucalibrate; | |
3906 | ||
3907 | ucalibrate.type = calibrate->type; | |
3908 | ret = ust_app_calibrate_glb(&ucalibrate); | |
3909 | if (ret < 0) { | |
3910 | ret = LTTCOMM_UST_CALIBRATE_FAIL; | |
3911 | goto error; | |
3912 | } | |
3913 | break; | |
3914 | } | |
54d01ffb | 3915 | default: |
1ab1ea0b | 3916 | ret = LTTCOMM_UND; |
54d01ffb DG |
3917 | goto error; |
3918 | } | |
33a2b854 | 3919 | |
54d01ffb | 3920 | ret = LTTCOMM_OK; |
33a2b854 | 3921 | |
54d01ffb DG |
3922 | error: |
3923 | return ret; | |
3924 | } | |
7d29a247 | 3925 | |
54d01ffb DG |
3926 | /* |
3927 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
3928 | */ | |
3929 | static int cmd_register_consumer(struct ltt_session *session, int domain, | |
3930 | char *sock_path) | |
3931 | { | |
3932 | int ret, sock; | |
173af62f | 3933 | struct consumer_socket *socket; |
b389abbe | 3934 | |
54d01ffb DG |
3935 | switch (domain) { |
3936 | case LTTNG_DOMAIN_KERNEL: | |
3937 | /* Can't register a consumer if there is already one */ | |
48c4f28c | 3938 | if (session->kernel_session->consumer_fds_sent != 0) { |
54d01ffb DG |
3939 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
3940 | goto error; | |
3941 | } | |
3942 | ||
3943 | sock = lttcomm_connect_unix_sock(sock_path); | |
3944 | if (sock < 0) { | |
3945 | ret = LTTCOMM_CONNECT_FAIL; | |
3946 | goto error; | |
3947 | } | |
3948 | ||
173af62f DG |
3949 | socket = consumer_allocate_socket(sock); |
3950 | if (socket == NULL) { | |
3951 | ret = LTTCOMM_FATAL; | |
3952 | close(sock); | |
3953 | goto error; | |
3954 | } | |
3955 | ||
e8209f6b DG |
3956 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); |
3957 | if (socket->lock == NULL) { | |
3958 | PERROR("zmalloc pthread mutex"); | |
3959 | ret = LTTCOMM_FATAL; | |
3960 | goto error; | |
3961 | } | |
3962 | pthread_mutex_init(socket->lock, NULL); | |
3963 | ||
173af62f DG |
3964 | rcu_read_lock(); |
3965 | consumer_add_socket(socket, session->kernel_session->consumer); | |
3966 | rcu_read_unlock(); | |
3967 | ||
e8209f6b DG |
3968 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3969 | kconsumer_data.pid = -1; | |
3970 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
3971 | ||
54d01ffb DG |
3972 | break; |
3973 | default: | |
3974 | /* TODO: Userspace tracing */ | |
1ab1ea0b | 3975 | ret = LTTCOMM_UND; |
54d01ffb DG |
3976 | goto error; |
3977 | } | |
3978 | ||
3979 | ret = LTTCOMM_OK; | |
3980 | ||
3981 | error: | |
3982 | return ret; | |
3983 | } | |
3984 | ||
3985 | /* | |
3986 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
3987 | */ | |
3988 | static ssize_t cmd_list_domains(struct ltt_session *session, | |
3989 | struct lttng_domain **domains) | |
3990 | { | |
b551a063 | 3991 | int ret, index = 0; |
54d01ffb DG |
3992 | ssize_t nb_dom = 0; |
3993 | ||
3994 | if (session->kernel_session != NULL) { | |
b551a063 | 3995 | DBG3("Listing domains found kernel domain"); |
54d01ffb DG |
3996 | nb_dom++; |
3997 | } | |
3998 | ||
b551a063 DG |
3999 | if (session->ust_session != NULL) { |
4000 | DBG3("Listing domains found UST global domain"); | |
4001 | nb_dom++; | |
4002 | } | |
54d01ffb | 4003 | |
b551a063 | 4004 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
54d01ffb DG |
4005 | if (*domains == NULL) { |
4006 | ret = -LTTCOMM_FATAL; | |
4007 | goto error; | |
4008 | } | |
4009 | ||
b551a063 DG |
4010 | if (session->kernel_session != NULL) { |
4011 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
4012 | index++; | |
4013 | } | |
4014 | ||
4015 | if (session->ust_session != NULL) { | |
4016 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
4017 | index++; | |
4018 | } | |
54d01ffb | 4019 | |
54d01ffb DG |
4020 | return nb_dom; |
4021 | ||
4022 | error: | |
4023 | return ret; | |
4024 | } | |
4025 | ||
4026 | /* | |
4027 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
4028 | */ | |
b551a063 | 4029 | static ssize_t cmd_list_channels(int domain, struct ltt_session *session, |
54d01ffb DG |
4030 | struct lttng_channel **channels) |
4031 | { | |
4032 | int ret; | |
4033 | ssize_t nb_chan = 0; | |
4034 | ||
b551a063 DG |
4035 | switch (domain) { |
4036 | case LTTNG_DOMAIN_KERNEL: | |
4037 | if (session->kernel_session != NULL) { | |
4038 | nb_chan = session->kernel_session->channel_count; | |
4039 | } | |
0df502fd | 4040 | DBG3("Number of kernel channels %zd", nb_chan); |
b551a063 DG |
4041 | break; |
4042 | case LTTNG_DOMAIN_UST: | |
4043 | if (session->ust_session != NULL) { | |
bec39940 | 4044 | nb_chan = lttng_ht_get_count( |
b551a063 DG |
4045 | session->ust_session->domain_global.channels); |
4046 | } | |
0df502fd | 4047 | DBG3("Number of UST global channels %zd", nb_chan); |
b551a063 DG |
4048 | break; |
4049 | default: | |
4050 | *channels = NULL; | |
1ab1ea0b | 4051 | ret = -LTTCOMM_UND; |
54d01ffb DG |
4052 | goto error; |
4053 | } | |
4054 | ||
b551a063 DG |
4055 | if (nb_chan > 0) { |
4056 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
4057 | if (*channels == NULL) { | |
4058 | ret = -LTTCOMM_FATAL; | |
4059 | goto error; | |
4060 | } | |
54d01ffb | 4061 | |
b551a063 DG |
4062 | list_lttng_channels(domain, session, *channels); |
4063 | } else { | |
4064 | *channels = NULL; | |
4065 | } | |
2bdd86d4 | 4066 | |
54d01ffb DG |
4067 | return nb_chan; |
4068 | ||
4069 | error: | |
4070 | return ret; | |
4071 | } | |
4072 | ||
4073 | /* | |
4074 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
4075 | */ | |
b551a063 | 4076 | static ssize_t cmd_list_events(int domain, struct ltt_session *session, |
54d01ffb DG |
4077 | char *channel_name, struct lttng_event **events) |
4078 | { | |
b551a063 | 4079 | int ret = 0; |
54d01ffb | 4080 | ssize_t nb_event = 0; |
54d01ffb | 4081 | |
b551a063 DG |
4082 | switch (domain) { |
4083 | case LTTNG_DOMAIN_KERNEL: | |
4084 | if (session->kernel_session != NULL) { | |
4085 | nb_event = list_lttng_kernel_events(channel_name, | |
4086 | session->kernel_session, events); | |
54d01ffb | 4087 | } |
b551a063 DG |
4088 | break; |
4089 | case LTTNG_DOMAIN_UST: | |
4090 | { | |
4091 | if (session->ust_session != NULL) { | |
4092 | nb_event = list_lttng_ust_global_events(channel_name, | |
4093 | &session->ust_session->domain_global, events); | |
4094 | } | |
4095 | break; | |
54d01ffb | 4096 | } |
b551a063 | 4097 | default: |
1ab1ea0b | 4098 | ret = -LTTCOMM_UND; |
54d01ffb DG |
4099 | goto error; |
4100 | } | |
4101 | ||
b551a063 | 4102 | ret = nb_event; |
54d01ffb DG |
4103 | |
4104 | error: | |
4105 | return ret; | |
4106 | } | |
4107 | ||
00e2e675 DG |
4108 | /* |
4109 | * Command LTTNG_DISABLE_CONSUMER processed by the client thread. | |
4110 | */ | |
4111 | static int cmd_disable_consumer(int domain, struct ltt_session *session) | |
4112 | { | |
4113 | int ret; | |
4114 | struct ltt_kernel_session *ksess = session->kernel_session; | |
4115 | struct ltt_ust_session *usess = session->ust_session; | |
4116 | struct consumer_output *consumer; | |
4117 | ||
a4b92340 DG |
4118 | assert(session); |
4119 | ||
00e2e675 DG |
4120 | if (session->enabled) { |
4121 | /* Can't disable consumer on an already started session */ | |
4122 | ret = LTTCOMM_TRACE_ALREADY_STARTED; | |
4123 | goto error; | |
4124 | } | |
4125 | ||
a4b92340 DG |
4126 | if (!session->start_consumer) { |
4127 | ret = LTTCOMM_NO_CONSUMER; | |
4128 | goto error; | |
4129 | } | |
4130 | ||
00e2e675 | 4131 | switch (domain) { |
a4b92340 DG |
4132 | case 0: |
4133 | DBG("Disable tracing session %s consumer", session->name); | |
4134 | consumer = session->consumer; | |
4135 | break; | |
00e2e675 DG |
4136 | case LTTNG_DOMAIN_KERNEL: |
4137 | /* Code flow error if we don't have a kernel session here. */ | |
4138 | assert(ksess); | |
4139 | ||
4140 | DBG("Disabling kernel consumer"); | |
4141 | consumer = ksess->consumer; | |
4142 | ||
4143 | break; | |
4144 | case LTTNG_DOMAIN_UST: | |
4145 | /* Code flow error if we don't have a UST session here. */ | |
4146 | assert(usess); | |
4147 | ||
4148 | DBG("Disabling UST consumer"); | |
4149 | consumer = usess->consumer; | |
4150 | ||
4151 | break; | |
4152 | default: | |
4153 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
4154 | goto error; | |
4155 | } | |
4156 | ||
a4b92340 DG |
4157 | if (consumer) { |
4158 | consumer->enabled = 0; | |
4159 | /* Success at this point */ | |
4160 | ret = LTTCOMM_OK; | |
4161 | } else { | |
4162 | ret = LTTCOMM_NO_CONSUMER; | |
4163 | } | |
00e2e675 DG |
4164 | |
4165 | error: | |
4166 | return ret; | |
4167 | } | |
4168 | ||
4169 | /* | |
4170 | * Command LTTNG_ENABLE_CONSUMER processed by the client thread. | |
4171 | */ | |
4172 | static int cmd_enable_consumer(int domain, struct ltt_session *session) | |
4173 | { | |
4174 | int ret; | |
4175 | struct ltt_kernel_session *ksess = session->kernel_session; | |
4176 | struct ltt_ust_session *usess = session->ust_session; | |
a4b92340 DG |
4177 | struct consumer_output *consumer = NULL; |
4178 | ||
4179 | assert(session); | |
00e2e675 DG |
4180 | |
4181 | /* Can't enable consumer after session started. */ | |
4182 | if (session->enabled) { | |
4183 | ret = LTTCOMM_TRACE_ALREADY_STARTED; | |
4184 | goto error; | |
4185 | } | |
4186 | ||
a4b92340 DG |
4187 | if (!session->start_consumer) { |
4188 | ret = LTTCOMM_NO_CONSUMER; | |
4189 | goto error; | |
4190 | } | |
4191 | ||
00e2e675 | 4192 | switch (domain) { |
a4b92340 DG |
4193 | case 0: |
4194 | assert(session->consumer); | |
4195 | consumer = session->consumer; | |
4196 | break; | |
00e2e675 DG |
4197 | case LTTNG_DOMAIN_KERNEL: |
4198 | /* Code flow error if we don't have a kernel session here. */ | |
4199 | assert(ksess); | |
4200 | ||
4201 | /* | |
4202 | * Check if we have already sent fds to the consumer. In that case, | |
4203 | * the enable-consumer command can't be used because a start trace | |
4204 | * had previously occured. | |
4205 | */ | |
4206 | if (ksess->consumer_fds_sent) { | |
4207 | ret = LTTCOMM_ENABLE_CONSUMER_FAIL; | |
4208 | goto error; | |
4209 | } | |
4210 | ||
a4b92340 DG |
4211 | consumer = ksess->tmp_consumer; |
4212 | if (consumer == NULL) { | |
4213 | ret = LTTCOMM_OK; | |
00e2e675 DG |
4214 | /* No temp. consumer output exists. Using the current one. */ |
4215 | DBG3("No temporary consumer. Using default"); | |
a4b92340 | 4216 | consumer = ksess->consumer; |
00e2e675 DG |
4217 | goto error; |
4218 | } | |
4219 | ||
a4b92340 | 4220 | switch (consumer->type) { |
00e2e675 DG |
4221 | case CONSUMER_DST_LOCAL: |
4222 | DBG2("Consumer output is local. Creating directory(ies)"); | |
4223 | ||
4224 | /* Create directory(ies) */ | |
a4b92340 | 4225 | ret = run_as_mkdir_recursive(consumer->dst.trace_path, |
00e2e675 DG |
4226 | S_IRWXU | S_IRWXG, session->uid, session->gid); |
4227 | if (ret < 0) { | |
4228 | if (ret != -EEXIST) { | |
4229 | ERR("Trace directory creation error"); | |
4230 | ret = LTTCOMM_FATAL; | |
4231 | goto error; | |
4232 | } | |
4233 | } | |
4234 | break; | |
4235 | case CONSUMER_DST_NET: | |
4236 | DBG2("Consumer output is network. Validating URIs"); | |
4237 | /* Validate if we have both control and data path set. */ | |
a4b92340 DG |
4238 | if (!consumer->dst.net.control_isset) { |
4239 | ret = LTTCOMM_URL_CTRL_MISS; | |
00e2e675 DG |
4240 | goto error; |
4241 | } | |
4242 | ||
a4b92340 DG |
4243 | if (!consumer->dst.net.data_isset) { |
4244 | ret = LTTCOMM_URL_DATA_MISS; | |
00e2e675 DG |
4245 | goto error; |
4246 | } | |
4247 | ||
4248 | /* Check established network session state */ | |
4249 | if (session->net_handle == 0) { | |
4250 | ret = LTTCOMM_ENABLE_CONSUMER_FAIL; | |
4251 | ERR("Session network handle is not set on enable-consumer"); | |
4252 | goto error; | |
4253 | } | |
4254 | ||
00e2e675 DG |
4255 | break; |
4256 | } | |
4257 | ||
07424f16 DG |
4258 | /* Append default kernel trace dir to subdir */ |
4259 | strncat(ksess->consumer->subdir, DEFAULT_KERNEL_TRACE_DIR, | |
4260 | sizeof(ksess->consumer->subdir)); | |
4261 | ||
00e2e675 DG |
4262 | /* |
4263 | * @session-lock | |
4264 | * This is race free for now since the session lock is acquired before | |
4265 | * ending up in this function. No other threads can access this kernel | |
4266 | * session without this lock hence freeing the consumer output object | |
4267 | * is valid. | |
4268 | */ | |
3f8e211f | 4269 | rcu_read_lock(); |
00e2e675 | 4270 | consumer_destroy_output(ksess->consumer); |
3f8e211f | 4271 | rcu_read_unlock(); |
a4b92340 | 4272 | ksess->consumer = consumer; |
00e2e675 DG |
4273 | ksess->tmp_consumer = NULL; |
4274 | ||
4275 | break; | |
4276 | case LTTNG_DOMAIN_UST: | |
4277 | /* Code flow error if we don't have a UST session here. */ | |
4278 | assert(usess); | |
4279 | ||
4280 | /* | |
4281 | * Check if we have already sent fds to the consumer. In that case, | |
4282 | * the enable-consumer command can't be used because a start trace | |
4283 | * had previously occured. | |
4284 | */ | |
4285 | if (usess->start_trace) { | |
4286 | ret = LTTCOMM_ENABLE_CONSUMER_FAIL; | |
4287 | goto error; | |
4288 | } | |
4289 | ||
a4b92340 DG |
4290 | consumer = usess->tmp_consumer; |
4291 | if (consumer == NULL) { | |
4292 | ret = LTTCOMM_OK; | |
00e2e675 DG |
4293 | /* No temp. consumer output exists. Using the current one. */ |
4294 | DBG3("No temporary consumer. Using default"); | |
a4b92340 | 4295 | consumer = usess->consumer; |
00e2e675 DG |
4296 | goto error; |
4297 | } | |
4298 | ||
a4b92340 | 4299 | switch (consumer->type) { |
00e2e675 DG |
4300 | case CONSUMER_DST_LOCAL: |
4301 | DBG2("Consumer output is local. Creating directory(ies)"); | |
4302 | ||
4303 | /* Create directory(ies) */ | |
a4b92340 | 4304 | ret = run_as_mkdir_recursive(consumer->dst.trace_path, |
00e2e675 DG |
4305 | S_IRWXU | S_IRWXG, session->uid, session->gid); |
4306 | if (ret < 0) { | |
4307 | if (ret != -EEXIST) { | |
4308 | ERR("Trace directory creation error"); | |
4309 | ret = LTTCOMM_FATAL; | |
4310 | goto error; | |
4311 | } | |
4312 | } | |
4313 | break; | |
4314 | case CONSUMER_DST_NET: | |
4315 | DBG2("Consumer output is network. Validating URIs"); | |
4316 | /* Validate if we have both control and data path set. */ | |
a4b92340 DG |
4317 | if (!consumer->dst.net.control_isset) { |
4318 | ret = LTTCOMM_URL_CTRL_MISS; | |
00e2e675 DG |
4319 | goto error; |
4320 | } | |
4321 | ||
a4b92340 DG |
4322 | if (!consumer->dst.net.data_isset) { |
4323 | ret = LTTCOMM_URL_DATA_MISS; | |
00e2e675 DG |
4324 | goto error; |
4325 | } | |
4326 | ||
4327 | /* Check established network session state */ | |
4328 | if (session->net_handle == 0) { | |
4329 | ret = LTTCOMM_ENABLE_CONSUMER_FAIL; | |
4330 | DBG2("Session network handle is not set on enable-consumer"); | |
4331 | goto error; | |
4332 | } | |
4333 | ||
a4b92340 | 4334 | if (consumer->net_seq_index == -1) { |
00e2e675 DG |
4335 | ret = LTTCOMM_ENABLE_CONSUMER_FAIL; |
4336 | DBG2("Network index is not set on the consumer"); | |
4337 | goto error; | |
4338 | } | |
4339 | ||
00e2e675 DG |
4340 | break; |
4341 | } | |
4342 | ||
07424f16 DG |
4343 | /* Append default kernel trace dir to subdir */ |
4344 | strncat(usess->consumer->subdir, DEFAULT_UST_TRACE_DIR, | |
4345 | sizeof(usess->consumer->subdir)); | |
4346 | ||
00e2e675 DG |
4347 | /* |
4348 | * @session-lock | |
4349 | * This is race free for now since the session lock is acquired before | |
4350 | * ending up in this function. No other threads can access this kernel | |
4351 | * session without this lock hence freeing the consumer output object | |
4352 | * is valid. | |
4353 | */ | |
3f8e211f | 4354 | rcu_read_lock(); |
00e2e675 | 4355 | consumer_destroy_output(usess->consumer); |
3f8e211f | 4356 | rcu_read_unlock(); |
a4b92340 | 4357 | usess->consumer = consumer; |
00e2e675 DG |
4358 | usess->tmp_consumer = NULL; |
4359 | ||
4360 | break; | |
4361 | } | |
4362 | ||
a4b92340 DG |
4363 | /* Enable it */ |
4364 | if (consumer) { | |
4365 | consumer->enabled = 1; | |
4366 | /* Success at this point */ | |
4367 | ret = LTTCOMM_OK; | |
4368 | } else { | |
4369 | /* Should not really happend... */ | |
4370 | ret = LTTCOMM_NO_CONSUMER; | |
4371 | } | |
00e2e675 DG |
4372 | |
4373 | error: | |
4374 | return ret; | |
4375 | } | |
4376 | ||
54d01ffb DG |
4377 | /* |
4378 | * Process the command requested by the lttng client within the command | |
4379 | * context structure. This function make sure that the return structure (llm) | |
4380 | * is set and ready for transmission before returning. | |
4381 | * | |
4382 | * Return any error encountered or 0 for success. | |
53a80697 MD |
4383 | * |
4384 | * "sock" is only used for special-case var. len data. | |
54d01ffb | 4385 | */ |
53a80697 MD |
4386 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
4387 | int *sock_error) | |
54d01ffb DG |
4388 | { |
4389 | int ret = LTTCOMM_OK; | |
44d3bd01 | 4390 | int need_tracing_session = 1; |
2e09ba09 | 4391 | int need_domain; |
54d01ffb DG |
4392 | |
4393 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
4394 | ||
53a80697 MD |
4395 | *sock_error = 0; |
4396 | ||
2e09ba09 MD |
4397 | switch (cmd_ctx->lsm->cmd_type) { |
4398 | case LTTNG_CREATE_SESSION: | |
4399 | case LTTNG_DESTROY_SESSION: | |
4400 | case LTTNG_LIST_SESSIONS: | |
4401 | case LTTNG_LIST_DOMAINS: | |
4402 | case LTTNG_START_TRACE: | |
4403 | case LTTNG_STOP_TRACE: | |
4404 | need_domain = 0; | |
3aace903 | 4405 | break; |
2e09ba09 MD |
4406 | default: |
4407 | need_domain = 1; | |
4408 | } | |
4409 | ||
4410 | if (opt_no_kernel && need_domain | |
4411 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 MD |
4412 | if (!is_root) { |
4413 | ret = LTTCOMM_NEED_ROOT_SESSIOND; | |
4414 | } else { | |
4415 | ret = LTTCOMM_KERN_NA; | |
4416 | } | |
4fba7219 DG |
4417 | goto error; |
4418 | } | |
4419 | ||
8d3113b2 DG |
4420 | /* Deny register consumer if we already have a spawned consumer. */ |
4421 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
4422 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
4423 | if (kconsumer_data.pid > 0) { | |
4424 | ret = LTTCOMM_KERN_CONSUMER_FAIL; | |
4425 | goto error; | |
4426 | } | |
4427 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
4428 | } | |
4429 | ||
54d01ffb DG |
4430 | /* |
4431 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 4432 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
4433 | * command. |
4434 | */ | |
4435 | switch(cmd_ctx->lsm->cmd_type) { | |
4436 | case LTTNG_LIST_SESSIONS: | |
4437 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 4438 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
4439 | case LTTNG_LIST_DOMAINS: |
4440 | case LTTNG_LIST_CHANNELS: | |
4441 | case LTTNG_LIST_EVENTS: | |
4442 | break; | |
4443 | default: | |
4444 | /* Setup lttng message with no payload */ | |
4445 | ret = setup_lttng_msg(cmd_ctx, 0); | |
4446 | if (ret < 0) { | |
4447 | /* This label does not try to unlock the session */ | |
4448 | goto init_setup_error; | |
4449 | } | |
4450 | } | |
4451 | ||
4452 | /* Commands that DO NOT need a session. */ | |
4453 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 4454 | case LTTNG_CREATE_SESSION: |
2e09ba09 | 4455 | case LTTNG_CALIBRATE: |
54d01ffb DG |
4456 | case LTTNG_LIST_SESSIONS: |
4457 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 4458 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
44d3bd01 | 4459 | need_tracing_session = 0; |
54d01ffb DG |
4460 | break; |
4461 | default: | |
4462 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
4463 | /* |
4464 | * We keep the session list lock across _all_ commands | |
4465 | * for now, because the per-session lock does not | |
4466 | * handle teardown properly. | |
4467 | */ | |
74babd95 | 4468 | session_lock_list(); |
54d01ffb DG |
4469 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
4470 | if (cmd_ctx->session == NULL) { | |
4471 | if (cmd_ctx->lsm->session.name != NULL) { | |
4472 | ret = LTTCOMM_SESS_NOT_FOUND; | |
4473 | } else { | |
4474 | /* If no session name specified */ | |
4475 | ret = LTTCOMM_SELECT_SESS; | |
4476 | } | |
4477 | goto error; | |
4478 | } else { | |
4479 | /* Acquire lock for the session */ | |
4480 | session_lock(cmd_ctx->session); | |
4481 | } | |
4482 | break; | |
4483 | } | |
b389abbe | 4484 | |
2e09ba09 MD |
4485 | if (!need_domain) { |
4486 | goto skip_domain; | |
4487 | } | |
a4b92340 | 4488 | |
54d01ffb DG |
4489 | /* |
4490 | * Check domain type for specific "pre-action". | |
4491 | */ | |
4492 | switch (cmd_ctx->lsm->domain.type) { | |
4493 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 4494 | if (!is_root) { |
531d29f9 | 4495 | ret = LTTCOMM_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
4496 | goto error; |
4497 | } | |
4498 | ||
54d01ffb | 4499 | /* Kernel tracer check */ |
a4b35e07 | 4500 | if (kernel_tracer_fd == -1) { |
54d01ffb | 4501 | /* Basically, load kernel tracer modules */ |
096102bd DG |
4502 | ret = init_kernel_tracer(); |
4503 | if (ret != 0) { | |
54d01ffb DG |
4504 | goto error; |
4505 | } | |
4506 | } | |
5eb91c98 | 4507 | |
5c827ce0 DG |
4508 | /* Consumer is in an ERROR state. Report back to client */ |
4509 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
4510 | ret = LTTCOMM_NO_KERNCONSUMERD; | |
4511 | goto error; | |
4512 | } | |
4513 | ||
54d01ffb | 4514 | /* Need a session for kernel command */ |
44d3bd01 | 4515 | if (need_tracing_session) { |
54d01ffb | 4516 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 4517 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 4518 | if (ret < 0) { |
54d01ffb | 4519 | ret = LTTCOMM_KERN_SESS_FAIL; |
5eb91c98 DG |
4520 | goto error; |
4521 | } | |
b389abbe | 4522 | } |
7d29a247 | 4523 | |
54d01ffb | 4524 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
4525 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
4526 | if (kconsumer_data.pid == 0 && | |
a4b92340 DG |
4527 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER && |
4528 | cmd_ctx->session->start_consumer) { | |
3bd1e081 MD |
4529 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
4530 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 4531 | if (ret < 0) { |
54d01ffb DG |
4532 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
4533 | goto error; | |
950131af | 4534 | } |
5c827ce0 | 4535 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
4536 | } else { |
4537 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 4538 | } |
173af62f | 4539 | |
a4b92340 DG |
4540 | /* |
4541 | * The consumer was just spawned so we need to add the socket to | |
4542 | * the consumer output of the session if exist. | |
4543 | */ | |
4544 | ret = consumer_create_socket(&kconsumer_data, | |
4545 | cmd_ctx->session->kernel_session->consumer); | |
4546 | if (ret < 0) { | |
4547 | goto error; | |
173af62f | 4548 | } |
0d0c377a | 4549 | } |
5c827ce0 | 4550 | |
54d01ffb | 4551 | break; |
2bdd86d4 | 4552 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 4553 | { |
5c827ce0 DG |
4554 | /* Consumer is in an ERROR state. Report back to client */ |
4555 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
4556 | ret = LTTCOMM_NO_USTCONSUMERD; | |
4557 | goto error; | |
4558 | } | |
4559 | ||
44d3bd01 | 4560 | if (need_tracing_session) { |
a4b92340 | 4561 | /* Create UST session if none exist. */ |
f6a9efaa | 4562 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 4563 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 4564 | &cmd_ctx->lsm->domain); |
44d3bd01 DG |
4565 | if (ret != LTTCOMM_OK) { |
4566 | goto error; | |
4567 | } | |
4568 | } | |
00e2e675 | 4569 | |
7753dea8 MD |
4570 | /* Start the UST consumer daemons */ |
4571 | /* 64-bit */ | |
4572 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 4573 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 4574 | ustconsumer64_data.pid == 0 && |
a4b92340 DG |
4575 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER && |
4576 | cmd_ctx->session->start_consumer) { | |
7753dea8 MD |
4577 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
4578 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 4579 | if (ret < 0) { |
7753dea8 | 4580 | ret = LTTCOMM_UST_CONSUMER64_FAIL; |
173af62f | 4581 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
4582 | goto error; |
4583 | } | |
48842b30 | 4584 | |
173af62f | 4585 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 4586 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 4587 | } else { |
7753dea8 MD |
4588 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
4589 | } | |
173af62f DG |
4590 | |
4591 | /* | |
4592 | * Setup socket for consumer 64 bit. No need for atomic access | |
4593 | * since it was set above and can ONLY be set in this thread. | |
4594 | */ | |
a4b92340 DG |
4595 | ret = consumer_create_socket(&ustconsumer64_data, |
4596 | cmd_ctx->session->ust_session->consumer); | |
4597 | if (ret < 0) { | |
4598 | goto error; | |
173af62f DG |
4599 | } |
4600 | ||
7753dea8 | 4601 | /* 32-bit */ |
fc7a59ce | 4602 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 4603 | ustconsumer32_data.pid == 0 && |
a4b92340 DG |
4604 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER && |
4605 | cmd_ctx->session->start_consumer) { | |
7753dea8 MD |
4606 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
4607 | ret = start_consumerd(&ustconsumer32_data); | |
4608 | if (ret < 0) { | |
4609 | ret = LTTCOMM_UST_CONSUMER32_FAIL; | |
173af62f | 4610 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
4611 | goto error; |
4612 | } | |
5c827ce0 | 4613 | |
173af62f | 4614 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 4615 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
4616 | } else { |
4617 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 4618 | } |
173af62f DG |
4619 | |
4620 | /* | |
4621 | * Setup socket for consumer 64 bit. No need for atomic access | |
4622 | * since it was set above and can ONLY be set in this thread. | |
4623 | */ | |
a4b92340 DG |
4624 | ret = consumer_create_socket(&ustconsumer32_data, |
4625 | cmd_ctx->session->ust_session->consumer); | |
4626 | if (ret < 0) { | |
4627 | goto error; | |
173af62f | 4628 | } |
44d3bd01 DG |
4629 | } |
4630 | break; | |
48842b30 | 4631 | } |
54d01ffb | 4632 | default: |
54d01ffb DG |
4633 | break; |
4634 | } | |
2e09ba09 | 4635 | skip_domain: |
33a2b854 | 4636 | |
5c827ce0 DG |
4637 | /* Validate consumer daemon state when start/stop trace command */ |
4638 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
4639 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
4640 | switch (cmd_ctx->lsm->domain.type) { | |
4641 | case LTTNG_DOMAIN_UST: | |
4642 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
4643 | ret = LTTCOMM_NO_USTCONSUMERD; | |
4644 | goto error; | |
4645 | } | |
4646 | break; | |
4647 | case LTTNG_DOMAIN_KERNEL: | |
4648 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
4649 | ret = LTTCOMM_NO_KERNCONSUMERD; | |
4650 | goto error; | |
4651 | } | |
4652 | break; | |
4653 | } | |
4654 | } | |
4655 | ||
8e0af1b4 MD |
4656 | /* |
4657 | * Check that the UID or GID match that of the tracing session. | |
4658 | * The root user can interact with all sessions. | |
4659 | */ | |
4660 | if (need_tracing_session) { | |
4661 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
4662 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
4663 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
8e0af1b4 MD |
4664 | ret = LTTCOMM_EPERM; |
4665 | goto error; | |
4666 | } | |
4667 | } | |
4668 | ||
54d01ffb DG |
4669 | /* Process by command type */ |
4670 | switch (cmd_ctx->lsm->cmd_type) { | |
4671 | case LTTNG_ADD_CONTEXT: | |
4672 | { | |
4673 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
4674 | cmd_ctx->lsm->u.context.channel_name, | |
4675 | cmd_ctx->lsm->u.context.event_name, | |
4676 | &cmd_ctx->lsm->u.context.ctx); | |
4677 | break; | |
4678 | } | |
4679 | case LTTNG_DISABLE_CHANNEL: | |
4680 | { | |
4681 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
4682 | cmd_ctx->lsm->u.disable.channel_name); | |
4683 | break; | |
4684 | } | |
4685 | case LTTNG_DISABLE_EVENT: | |
4686 | { | |
4687 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
4688 | cmd_ctx->lsm->u.disable.channel_name, | |
4689 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
4690 | break; |
4691 | } | |
54d01ffb DG |
4692 | case LTTNG_DISABLE_ALL_EVENT: |
4693 | { | |
2bdd86d4 | 4694 | DBG("Disabling all events"); |
54d01ffb DG |
4695 | |
4696 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
4697 | cmd_ctx->lsm->u.disable.channel_name); | |
4698 | break; | |
4699 | } | |
00e2e675 DG |
4700 | case LTTNG_DISABLE_CONSUMER: |
4701 | { | |
4702 | ret = cmd_disable_consumer(cmd_ctx->lsm->domain.type, cmd_ctx->session); | |
4703 | break; | |
4704 | } | |
54d01ffb DG |
4705 | case LTTNG_ENABLE_CHANNEL: |
4706 | { | |
aea829b3 | 4707 | ret = cmd_enable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
54d01ffb DG |
4708 | &cmd_ctx->lsm->u.channel.chan); |
4709 | break; | |
4710 | } | |
00e2e675 DG |
4711 | case LTTNG_ENABLE_CONSUMER: |
4712 | { | |
a4b92340 DG |
4713 | /* |
4714 | * XXX: 0 means that this URI should be applied on the session. Should | |
4715 | * be a DOMAIN enuam. | |
4716 | */ | |
00e2e675 | 4717 | ret = cmd_enable_consumer(cmd_ctx->lsm->domain.type, cmd_ctx->session); |
a4b92340 DG |
4718 | if (ret != LTTCOMM_OK) { |
4719 | goto error; | |
4720 | } | |
4721 | ||
4722 | if (cmd_ctx->lsm->domain.type == 0) { | |
4723 | /* Add the URI for the UST session if a consumer is present. */ | |
4724 | if (cmd_ctx->session->ust_session && | |
4725 | cmd_ctx->session->ust_session->consumer) { | |
4726 | ret = cmd_enable_consumer(LTTNG_DOMAIN_UST, cmd_ctx->session); | |
4727 | } else if (cmd_ctx->session->kernel_session && | |
4728 | cmd_ctx->session->kernel_session->consumer) { | |
4729 | ret = cmd_enable_consumer(LTTNG_DOMAIN_KERNEL, | |
4730 | cmd_ctx->session); | |
4731 | } | |
4732 | } | |
00e2e675 DG |
4733 | break; |
4734 | } | |
54d01ffb DG |
4735 | case LTTNG_ENABLE_EVENT: |
4736 | { | |
4737 | ret = cmd_enable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
4738 | cmd_ctx->lsm->u.enable.channel_name, | |
4739 | &cmd_ctx->lsm->u.enable.event); | |
4740 | break; | |
4741 | } | |
4742 | case LTTNG_ENABLE_ALL_EVENT: | |
4743 | { | |
2bdd86d4 | 4744 | DBG("Enabling all events"); |
54d01ffb DG |
4745 | |
4746 | ret = cmd_enable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
8c9ae521 DG |
4747 | cmd_ctx->lsm->u.enable.channel_name, |
4748 | cmd_ctx->lsm->u.enable.event.type); | |
54d01ffb DG |
4749 | break; |
4750 | } | |
052da939 | 4751 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 4752 | { |
9f19cc17 | 4753 | struct lttng_event *events; |
54d01ffb | 4754 | ssize_t nb_events; |
052da939 | 4755 | |
54d01ffb DG |
4756 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
4757 | if (nb_events < 0) { | |
4758 | ret = -nb_events; | |
4759 | goto error; | |
2ef84c95 DG |
4760 | } |
4761 | ||
4762 | /* | |
4763 | * Setup lttng message with payload size set to the event list size in | |
4764 | * bytes and then copy list into the llm payload. | |
4765 | */ | |
052da939 | 4766 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 4767 | if (ret < 0) { |
052da939 | 4768 | free(events); |
2ef84c95 DG |
4769 | goto setup_error; |
4770 | } | |
4771 | ||
4772 | /* Copy event list into message payload */ | |
9f19cc17 | 4773 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 4774 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 4775 | |
9f19cc17 | 4776 | free(events); |
2ef84c95 DG |
4777 | |
4778 | ret = LTTCOMM_OK; | |
4779 | break; | |
4780 | } | |
f37d259d MD |
4781 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
4782 | { | |
4783 | struct lttng_event_field *fields; | |
4784 | ssize_t nb_fields; | |
4785 | ||
a4b92340 DG |
4786 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
4787 | &fields); | |
f37d259d MD |
4788 | if (nb_fields < 0) { |
4789 | ret = -nb_fields; | |
4790 | goto error; | |
4791 | } | |
4792 | ||
4793 | /* | |
4794 | * Setup lttng message with payload size set to the event list size in | |
4795 | * bytes and then copy list into the llm payload. | |
4796 | */ | |
a4b92340 DG |
4797 | ret = setup_lttng_msg(cmd_ctx, |
4798 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
4799 | if (ret < 0) { |
4800 | free(fields); | |
4801 | goto setup_error; | |
4802 | } | |
4803 | ||
4804 | /* Copy event list into message payload */ | |
4805 | memcpy(cmd_ctx->llm->payload, fields, | |
4806 | sizeof(struct lttng_event_field) * nb_fields); | |
4807 | ||
4808 | free(fields); | |
4809 | ||
4810 | ret = LTTCOMM_OK; | |
4811 | break; | |
4812 | } | |
00e2e675 DG |
4813 | case LTTNG_SET_CONSUMER_URI: |
4814 | { | |
a4b92340 DG |
4815 | size_t nb_uri, len; |
4816 | struct lttng_uri *uris; | |
4817 | ||
4818 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4819 | len = nb_uri * sizeof(struct lttng_uri); | |
4820 | ||
4821 | if (nb_uri == 0) { | |
4822 | ret = LTTCOMM_INVALID; | |
4823 | goto error; | |
4824 | } | |
4825 | ||
4826 | uris = zmalloc(len); | |
4827 | if (uris == NULL) { | |
4828 | ret = LTTCOMM_FATAL; | |
4829 | goto error; | |
4830 | } | |
4831 | ||
4832 | /* Receive variable len data */ | |
77c7c900 | 4833 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
4834 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
4835 | if (ret <= 0) { | |
4836 | DBG("No URIs received from client... continuing"); | |
4837 | *sock_error = 1; | |
4838 | ret = LTTCOMM_SESSION_FAIL; | |
4839 | goto error; | |
4840 | } | |
4841 | ||
00e2e675 | 4842 | ret = cmd_set_consumer_uri(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
a4b92340 DG |
4843 | nb_uri, uris); |
4844 | if (ret != LTTCOMM_OK) { | |
4845 | goto error; | |
4846 | } | |
4847 | ||
4848 | /* | |
4849 | * XXX: 0 means that this URI should be applied on the session. Should | |
4850 | * be a DOMAIN enuam. | |
4851 | */ | |
4852 | if (cmd_ctx->lsm->domain.type == 0) { | |
4853 | /* Add the URI for the UST session if a consumer is present. */ | |
4854 | if (cmd_ctx->session->ust_session && | |
4855 | cmd_ctx->session->ust_session->consumer) { | |
4856 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_UST, cmd_ctx->session, | |
4857 | nb_uri, uris); | |
4858 | } else if (cmd_ctx->session->kernel_session && | |
4859 | cmd_ctx->session->kernel_session->consumer) { | |
4860 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_KERNEL, | |
4861 | cmd_ctx->session, nb_uri, uris); | |
4862 | } | |
4863 | } | |
4864 | ||
00e2e675 DG |
4865 | break; |
4866 | } | |
f3ed775e | 4867 | case LTTNG_START_TRACE: |
8c0faa1d | 4868 | { |
54d01ffb | 4869 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
4870 | break; |
4871 | } | |
f3ed775e | 4872 | case LTTNG_STOP_TRACE: |
8c0faa1d | 4873 | { |
54d01ffb | 4874 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
4875 | break; |
4876 | } | |
5e16da05 MD |
4877 | case LTTNG_CREATE_SESSION: |
4878 | { | |
a4b92340 DG |
4879 | size_t nb_uri, len; |
4880 | struct lttng_uri *uris = NULL; | |
4881 | ||
4882 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4883 | len = nb_uri * sizeof(struct lttng_uri); | |
4884 | ||
4885 | if (nb_uri > 0) { | |
4886 | uris = zmalloc(len); | |
4887 | if (uris == NULL) { | |
4888 | ret = LTTCOMM_FATAL; | |
4889 | goto error; | |
4890 | } | |
4891 | ||
4892 | /* Receive variable len data */ | |
77c7c900 | 4893 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
4894 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
4895 | if (ret <= 0) { | |
4896 | DBG("No URIs received from client... continuing"); | |
4897 | *sock_error = 1; | |
4898 | ret = LTTCOMM_SESSION_FAIL; | |
4899 | goto error; | |
4900 | } | |
4901 | ||
4902 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4903 | DBG("Creating session with ONE network URI is a bad call"); | |
4904 | ret = LTTCOMM_SESSION_FAIL; | |
4905 | goto error; | |
4906 | } | |
4907 | } | |
4908 | ||
4909 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
4910 | &cmd_ctx->creds); | |
4911 | ||
00e2e675 DG |
4912 | break; |
4913 | } | |
5e16da05 MD |
4914 | case LTTNG_DESTROY_SESSION: |
4915 | { | |
54d01ffb DG |
4916 | ret = cmd_destroy_session(cmd_ctx->session, |
4917 | cmd_ctx->lsm->session.name); | |
a4b92340 DG |
4918 | |
4919 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 4920 | cmd_ctx->session = NULL; |
5461b305 | 4921 | break; |
5e16da05 | 4922 | } |
9f19cc17 | 4923 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 4924 | { |
54d01ffb DG |
4925 | ssize_t nb_dom; |
4926 | struct lttng_domain *domains; | |
5461b305 | 4927 | |
54d01ffb DG |
4928 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
4929 | if (nb_dom < 0) { | |
4930 | ret = -nb_dom; | |
4931 | goto error; | |
ce3d728c | 4932 | } |
520ff687 | 4933 | |
54d01ffb | 4934 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 DG |
4935 | if (ret < 0) { |
4936 | goto setup_error; | |
520ff687 | 4937 | } |
57167058 | 4938 | |
54d01ffb DG |
4939 | /* Copy event list into message payload */ |
4940 | memcpy(cmd_ctx->llm->payload, domains, | |
4941 | nb_dom * sizeof(struct lttng_domain)); | |
4942 | ||
4943 | free(domains); | |
5e16da05 | 4944 | |
5461b305 | 4945 | ret = LTTCOMM_OK; |
5e16da05 MD |
4946 | break; |
4947 | } | |
9f19cc17 | 4948 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 4949 | { |
6775595e | 4950 | int nb_chan; |
54d01ffb DG |
4951 | struct lttng_channel *channels; |
4952 | ||
b551a063 DG |
4953 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
4954 | cmd_ctx->session, &channels); | |
54d01ffb DG |
4955 | if (nb_chan < 0) { |
4956 | ret = -nb_chan; | |
4957 | goto error; | |
5461b305 | 4958 | } |
ca95a216 | 4959 | |
54d01ffb | 4960 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 DG |
4961 | if (ret < 0) { |
4962 | goto setup_error; | |
4963 | } | |
9f19cc17 | 4964 | |
54d01ffb DG |
4965 | /* Copy event list into message payload */ |
4966 | memcpy(cmd_ctx->llm->payload, channels, | |
4967 | nb_chan * sizeof(struct lttng_channel)); | |
4968 | ||
4969 | free(channels); | |
9f19cc17 DG |
4970 | |
4971 | ret = LTTCOMM_OK; | |
5461b305 | 4972 | break; |
5e16da05 | 4973 | } |
9f19cc17 | 4974 | case LTTNG_LIST_EVENTS: |
5e16da05 | 4975 | { |
b551a063 | 4976 | ssize_t nb_event; |
684d34d2 | 4977 | struct lttng_event *events = NULL; |
9f19cc17 | 4978 | |
b551a063 | 4979 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
4980 | cmd_ctx->lsm->u.list.channel_name, &events); |
4981 | if (nb_event < 0) { | |
4982 | ret = -nb_event; | |
4983 | goto error; | |
5461b305 | 4984 | } |
ca95a216 | 4985 | |
54d01ffb | 4986 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 DG |
4987 | if (ret < 0) { |
4988 | goto setup_error; | |
4989 | } | |
9f19cc17 | 4990 | |
54d01ffb DG |
4991 | /* Copy event list into message payload */ |
4992 | memcpy(cmd_ctx->llm->payload, events, | |
4993 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 4994 | |
54d01ffb | 4995 | free(events); |
9f19cc17 DG |
4996 | |
4997 | ret = LTTCOMM_OK; | |
5461b305 | 4998 | break; |
5e16da05 MD |
4999 | } |
5000 | case LTTNG_LIST_SESSIONS: | |
5001 | { | |
8e0af1b4 | 5002 | unsigned int nr_sessions; |
5461b305 | 5003 | |
8e0af1b4 | 5004 | session_lock_list(); |
730389d9 DG |
5005 | nr_sessions = lttng_sessions_count( |
5006 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
5007 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 5008 | |
8e0af1b4 | 5009 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 5010 | if (ret < 0) { |
54d01ffb | 5011 | session_unlock_list(); |
5461b305 | 5012 | goto setup_error; |
e065084a | 5013 | } |
5e16da05 | 5014 | |
6c9cc2ab | 5015 | /* Filled the session array */ |
8e0af1b4 | 5016 | list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
5017 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
5018 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 5019 | |
54d01ffb | 5020 | session_unlock_list(); |
5e16da05 | 5021 | |
5461b305 | 5022 | ret = LTTCOMM_OK; |
5e16da05 MD |
5023 | break; |
5024 | } | |
d0254c7c MD |
5025 | case LTTNG_CALIBRATE: |
5026 | { | |
54d01ffb DG |
5027 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
5028 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
5029 | break; |
5030 | } | |
d9800920 DG |
5031 | case LTTNG_REGISTER_CONSUMER: |
5032 | { | |
54d01ffb DG |
5033 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
5034 | cmd_ctx->lsm->u.reg.path); | |
d9800920 DG |
5035 | break; |
5036 | } | |
53a80697 MD |
5037 | case LTTNG_SET_FILTER: |
5038 | { | |
5039 | struct lttng_filter_bytecode *bytecode; | |
5040 | ||
5041 | if (cmd_ctx->lsm->u.filter.bytecode_len > 65336) { | |
5042 | ret = LTTCOMM_FILTER_INVAL; | |
5043 | goto error; | |
5044 | } | |
5045 | bytecode = zmalloc(cmd_ctx->lsm->u.filter.bytecode_len); | |
5046 | if (!bytecode) { | |
5047 | ret = LTTCOMM_FILTER_NOMEM; | |
5048 | goto error; | |
5049 | } | |
5050 | /* Receive var. len. data */ | |
5051 | DBG("Receiving var len data from client ..."); | |
5052 | ret = lttcomm_recv_unix_sock(sock, bytecode, | |
5053 | cmd_ctx->lsm->u.filter.bytecode_len); | |
5054 | if (ret <= 0) { | |
5055 | DBG("Nothing recv() from client var len data... continuing"); | |
5056 | *sock_error = 1; | |
5057 | ret = LTTCOMM_FILTER_INVAL; | |
5058 | goto error; | |
5059 | } | |
5060 | ||
5061 | if (bytecode->len + sizeof(*bytecode) | |
5062 | != cmd_ctx->lsm->u.filter.bytecode_len) { | |
5063 | free(bytecode); | |
5064 | ret = LTTCOMM_FILTER_INVAL; | |
5065 | goto error; | |
5066 | } | |
5067 | ||
5068 | ret = cmd_set_filter(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
5069 | cmd_ctx->lsm->u.filter.channel_name, | |
5070 | cmd_ctx->lsm->u.filter.event_name, | |
5071 | bytecode); | |
5072 | break; | |
5073 | } | |
5e16da05 | 5074 | default: |
5e16da05 | 5075 | ret = LTTCOMM_UND; |
5461b305 | 5076 | break; |
fac6795d DG |
5077 | } |
5078 | ||
5461b305 | 5079 | error: |
5461b305 DG |
5080 | if (cmd_ctx->llm == NULL) { |
5081 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 5082 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
5083 | goto setup_error; |
5084 | } | |
5085 | } | |
54d01ffb | 5086 | /* Set return code */ |
5461b305 | 5087 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 5088 | setup_error: |
b5541356 | 5089 | if (cmd_ctx->session) { |
54d01ffb | 5090 | session_unlock(cmd_ctx->session); |
b5541356 | 5091 | } |
256a5576 MD |
5092 | if (need_tracing_session) { |
5093 | session_unlock_list(); | |
5094 | } | |
54d01ffb | 5095 | init_setup_error: |
8028d920 | 5096 | return ret; |
fac6795d DG |
5097 | } |
5098 | ||
44a5e5eb DG |
5099 | /* |
5100 | * Thread managing health check socket. | |
5101 | */ | |
5102 | static void *thread_manage_health(void *data) | |
5103 | { | |
eb4a2943 | 5104 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
5105 | uint32_t revents, nb_fd; |
5106 | struct lttng_poll_event events; | |
5107 | struct lttcomm_health_msg msg; | |
5108 | struct lttcomm_health_data reply; | |
5109 | ||
5110 | DBG("[thread] Manage health check started"); | |
5111 | ||
5112 | rcu_register_thread(); | |
5113 | ||
5114 | /* Create unix socket */ | |
5115 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
5116 | if (sock < 0) { | |
5117 | ERR("Unable to create health check Unix socket"); | |
5118 | ret = -1; | |
5119 | goto error; | |
5120 | } | |
5121 | ||
5122 | ret = lttcomm_listen_unix_sock(sock); | |
5123 | if (ret < 0) { | |
5124 | goto error; | |
5125 | } | |
5126 | ||
5127 | /* | |
5128 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
5129 | * more will be added to this poll set. | |
5130 | */ | |
5131 | ret = create_thread_poll_set(&events, 2); | |
5132 | if (ret < 0) { | |
5133 | goto error; | |
5134 | } | |
5135 | ||
5136 | /* Add the application registration socket */ | |
5137 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
5138 | if (ret < 0) { | |
5139 | goto error; | |
5140 | } | |
5141 | ||
5142 | while (1) { | |
5143 | DBG("Health check ready"); | |
5144 | ||
5145 | nb_fd = LTTNG_POLL_GETNB(&events); | |
5146 | ||
5147 | /* Inifinite blocking call, waiting for transmission */ | |
5148 | restart: | |
5149 | ret = lttng_poll_wait(&events, -1); | |
5150 | if (ret < 0) { | |
5151 | /* | |
5152 | * Restart interrupted system call. | |
5153 | */ | |
5154 | if (errno == EINTR) { | |
5155 | goto restart; | |
5156 | } | |
5157 | goto error; | |
5158 | } | |
5159 | ||
5160 | for (i = 0; i < nb_fd; i++) { | |
5161 | /* Fetch once the poll data */ | |
5162 | revents = LTTNG_POLL_GETEV(&events, i); | |
5163 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5164 | ||
5165 | /* Thread quit pipe has been closed. Killing thread. */ | |
5166 | ret = check_thread_quit_pipe(pollfd, revents); | |
5167 | if (ret) { | |
139ac872 MD |
5168 | err = 0; |
5169 | goto exit; | |
44a5e5eb DG |
5170 | } |
5171 | ||
5172 | /* Event on the registration socket */ | |
5173 | if (pollfd == sock) { | |
5174 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
5175 | ERR("Health socket poll error"); | |
5176 | goto error; | |
5177 | } | |
5178 | } | |
5179 | } | |
5180 | ||
5181 | new_sock = lttcomm_accept_unix_sock(sock); | |
5182 | if (new_sock < 0) { | |
5183 | goto error; | |
5184 | } | |
5185 | ||
5186 | DBG("Receiving data from client for health..."); | |
5187 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
5188 | if (ret <= 0) { | |
5189 | DBG("Nothing recv() from client... continuing"); | |
5190 | ret = close(new_sock); | |
5191 | if (ret) { | |
5192 | PERROR("close"); | |
5193 | } | |
5194 | new_sock = -1; | |
5195 | continue; | |
5196 | } | |
5197 | ||
5198 | rcu_thread_online(); | |
5199 | ||
5200 | switch (msg.component) { | |
5201 | case LTTNG_HEALTH_CMD: | |
5202 | reply.ret_code = health_check_state(&health_thread_cmd); | |
5203 | break; | |
139ac872 MD |
5204 | case LTTNG_HEALTH_APP_MANAGE: |
5205 | reply.ret_code = health_check_state(&health_thread_app_manage); | |
5206 | break; | |
44a5e5eb DG |
5207 | case LTTNG_HEALTH_APP_REG: |
5208 | reply.ret_code = health_check_state(&health_thread_app_reg); | |
5209 | break; | |
5210 | case LTTNG_HEALTH_KERNEL: | |
5211 | reply.ret_code = health_check_state(&health_thread_kernel); | |
5212 | break; | |
5213 | case LTTNG_HEALTH_CONSUMER: | |
5214 | reply.ret_code = check_consumer_health(); | |
5215 | break; | |
5216 | case LTTNG_HEALTH_ALL: | |
44a5e5eb | 5217 | reply.ret_code = |
139ac872 MD |
5218 | health_check_state(&health_thread_app_manage) && |
5219 | health_check_state(&health_thread_app_reg) && | |
5220 | health_check_state(&health_thread_cmd) && | |
5221 | health_check_state(&health_thread_kernel) && | |
5222 | check_consumer_health(); | |
44a5e5eb DG |
5223 | break; |
5224 | default: | |
5225 | reply.ret_code = LTTCOMM_UND; | |
5226 | break; | |
5227 | } | |
5228 | ||
5229 | /* | |
5230 | * Flip ret value since 0 is a success and 1 indicates a bad health for | |
5231 | * the client where in the sessiond it is the opposite. Again, this is | |
5232 | * just to make things easier for us poor developer which enjoy a lot | |
5233 | * lazyness. | |
5234 | */ | |
5235 | if (reply.ret_code == 0 || reply.ret_code == 1) { | |
5236 | reply.ret_code = !reply.ret_code; | |
5237 | } | |
5238 | ||
5239 | DBG2("Health check return value %d", reply.ret_code); | |
5240 | ||
5241 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
5242 | if (ret < 0) { | |
5243 | ERR("Failed to send health data back to client"); | |
5244 | } | |
5245 | ||
5246 | /* End of transmission */ | |
5247 | ret = close(new_sock); | |
5248 | if (ret) { | |
5249 | PERROR("close"); | |
5250 | } | |
5251 | new_sock = -1; | |
5252 | } | |
5253 | ||
139ac872 | 5254 | exit: |
44a5e5eb | 5255 | error: |
139ac872 MD |
5256 | if (err) { |
5257 | ERR("Health error occurred in %s", __func__); | |
5258 | } | |
44a5e5eb DG |
5259 | DBG("Health check thread dying"); |
5260 | unlink(health_unix_sock_path); | |
5261 | if (sock >= 0) { | |
5262 | ret = close(sock); | |
5263 | if (ret) { | |
5264 | PERROR("close"); | |
5265 | } | |
5266 | } | |
5267 | if (new_sock >= 0) { | |
5268 | ret = close(new_sock); | |
5269 | if (ret) { | |
5270 | PERROR("close"); | |
5271 | } | |
5272 | } | |
5273 | ||
5274 | lttng_poll_clean(&events); | |
5275 | ||
5276 | rcu_unregister_thread(); | |
5277 | return NULL; | |
5278 | } | |
5279 | ||
1d4b027a | 5280 | /* |
d063d709 DG |
5281 | * This thread manage all clients request using the unix client socket for |
5282 | * communication. | |
1d4b027a DG |
5283 | */ |
5284 | static void *thread_manage_clients(void *data) | |
5285 | { | |
139ac872 | 5286 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 5287 | int sock_error; |
5eb91c98 | 5288 | uint32_t revents, nb_fd; |
273ea72c | 5289 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 5290 | struct lttng_poll_event events; |
1d4b027a DG |
5291 | |
5292 | DBG("[thread] Manage client started"); | |
5293 | ||
f6a9efaa DG |
5294 | rcu_register_thread(); |
5295 | ||
44a5e5eb DG |
5296 | health_code_update(&health_thread_cmd); |
5297 | ||
1d4b027a DG |
5298 | ret = lttcomm_listen_unix_sock(client_sock); |
5299 | if (ret < 0) { | |
5300 | goto error; | |
5301 | } | |
5302 | ||
5eb91c98 DG |
5303 | /* |
5304 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
5305 | * more will be added to this poll set. | |
5306 | */ | |
5307 | ret = create_thread_poll_set(&events, 2); | |
5308 | if (ret < 0) { | |
5309 | goto error; | |
5310 | } | |
273ea72c | 5311 | |
5eb91c98 DG |
5312 | /* Add the application registration socket */ |
5313 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
5314 | if (ret < 0) { | |
5315 | goto error; | |
5316 | } | |
273ea72c | 5317 | |
bbd973c2 DG |
5318 | /* |
5319 | * Notify parent pid that we are ready to accept command for client side. | |
1d4b027a DG |
5320 | */ |
5321 | if (opt_sig_parent) { | |
8db8d1dc | 5322 | kill(ppid, SIGUSR1); |
1d4b027a DG |
5323 | } |
5324 | ||
44a5e5eb DG |
5325 | health_code_update(&health_thread_cmd); |
5326 | ||
1d4b027a | 5327 | while (1) { |
1d4b027a | 5328 | DBG("Accepting client command ..."); |
273ea72c | 5329 | |
5eb91c98 DG |
5330 | nb_fd = LTTNG_POLL_GETNB(&events); |
5331 | ||
273ea72c | 5332 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 5333 | restart: |
44a5e5eb | 5334 | health_poll_update(&health_thread_cmd); |
5eb91c98 | 5335 | ret = lttng_poll_wait(&events, -1); |
44a5e5eb | 5336 | health_poll_update(&health_thread_cmd); |
273ea72c | 5337 | if (ret < 0) { |
88f2b785 MD |
5338 | /* |
5339 | * Restart interrupted system call. | |
5340 | */ | |
5341 | if (errno == EINTR) { | |
5342 | goto restart; | |
5343 | } | |
273ea72c DG |
5344 | goto error; |
5345 | } | |
5346 | ||
5eb91c98 DG |
5347 | for (i = 0; i < nb_fd; i++) { |
5348 | /* Fetch once the poll data */ | |
5349 | revents = LTTNG_POLL_GETEV(&events, i); | |
5350 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5351 | ||
44a5e5eb DG |
5352 | health_code_update(&health_thread_cmd); |
5353 | ||
5eb91c98 DG |
5354 | /* Thread quit pipe has been closed. Killing thread. */ |
5355 | ret = check_thread_quit_pipe(pollfd, revents); | |
5356 | if (ret) { | |
139ac872 MD |
5357 | err = 0; |
5358 | goto exit; | |
5eb91c98 DG |
5359 | } |
5360 | ||
5361 | /* Event on the registration socket */ | |
5362 | if (pollfd == client_sock) { | |
5363 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
5364 | ERR("Client socket poll error"); | |
5365 | goto error; | |
5366 | } | |
5367 | } | |
5368 | } | |
5369 | ||
5370 | DBG("Wait for client response"); | |
5371 | ||
44a5e5eb DG |
5372 | health_code_update(&health_thread_cmd); |
5373 | ||
5eb91c98 DG |
5374 | sock = lttcomm_accept_unix_sock(client_sock); |
5375 | if (sock < 0) { | |
273ea72c | 5376 | goto error; |
273ea72c DG |
5377 | } |
5378 | ||
be040666 DG |
5379 | /* Set socket option for credentials retrieval */ |
5380 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
5381 | if (ret < 0) { | |
5382 | goto error; | |
5383 | } | |
5384 | ||
5eb91c98 | 5385 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 5386 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 5387 | if (cmd_ctx == NULL) { |
76d7553f | 5388 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 5389 | goto error; |
5eb91c98 | 5390 | } |
1d4b027a | 5391 | |
5eb91c98 | 5392 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 5393 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 5394 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 5395 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
5396 | goto error; |
5397 | } | |
1d4b027a | 5398 | |
5eb91c98 DG |
5399 | cmd_ctx->llm = NULL; |
5400 | cmd_ctx->session = NULL; | |
1d4b027a | 5401 | |
44a5e5eb DG |
5402 | health_code_update(&health_thread_cmd); |
5403 | ||
5eb91c98 DG |
5404 | /* |
5405 | * Data is received from the lttng client. The struct | |
5406 | * lttcomm_session_msg (lsm) contains the command and data request of | |
5407 | * the client. | |
5408 | */ | |
5409 | DBG("Receiving data from client ..."); | |
be040666 DG |
5410 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
5411 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
5412 | if (ret <= 0) { |
5413 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
5414 | ret = close(sock); |
5415 | if (ret) { | |
5416 | PERROR("close"); | |
5417 | } | |
5418 | sock = -1; | |
a2c0da86 | 5419 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
5420 | continue; |
5421 | } | |
1d4b027a | 5422 | |
44a5e5eb DG |
5423 | health_code_update(&health_thread_cmd); |
5424 | ||
5eb91c98 DG |
5425 | // TODO: Validate cmd_ctx including sanity check for |
5426 | // security purpose. | |
f7776ea7 | 5427 | |
f6a9efaa | 5428 | rcu_thread_online(); |
5eb91c98 DG |
5429 | /* |
5430 | * This function dispatch the work to the kernel or userspace tracer | |
5431 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
5432 | * informations for the client. The command context struct contains | |
5433 | * everything this function may needs. | |
5434 | */ | |
53a80697 | 5435 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 5436 | rcu_thread_offline(); |
5eb91c98 | 5437 | if (ret < 0) { |
53a80697 MD |
5438 | if (sock_error) { |
5439 | ret = close(sock); | |
5440 | if (ret) { | |
5441 | PERROR("close"); | |
5442 | } | |
5443 | sock = -1; | |
5444 | } | |
bbd973c2 | 5445 | /* |
5eb91c98 | 5446 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 5447 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
5448 | * (ENOMEM). Error detected but still accept |
5449 | * command, unless a socket error has been | |
5450 | * detected. | |
bbd973c2 | 5451 | */ |
bbd973c2 | 5452 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
5453 | continue; |
5454 | } | |
d6e4fca4 | 5455 | |
44a5e5eb DG |
5456 | health_code_update(&health_thread_cmd); |
5457 | ||
54d01ffb DG |
5458 | DBG("Sending response (size: %d, retcode: %s)", |
5459 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 5460 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 5461 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
5462 | if (ret < 0) { |
5463 | ERR("Failed to send data back to client"); | |
bbd973c2 | 5464 | } |
1d4b027a | 5465 | |
5eb91c98 | 5466 | /* End of transmission */ |
76d7553f MD |
5467 | ret = close(sock); |
5468 | if (ret) { | |
5469 | PERROR("close"); | |
5470 | } | |
5471 | sock = -1; | |
be040666 DG |
5472 | |
5473 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb DG |
5474 | |
5475 | health_code_update(&health_thread_cmd); | |
273ea72c DG |
5476 | } |
5477 | ||
139ac872 | 5478 | exit: |
5eb91c98 | 5479 | error: |
139ac872 MD |
5480 | if (err) { |
5481 | health_error(&health_thread_cmd); | |
5482 | ERR("Health error occurred in %s", __func__); | |
5483 | } | |
5484 | health_exit(&health_thread_cmd); | |
44a5e5eb | 5485 | |
5eb91c98 | 5486 | DBG("Client thread dying"); |
273ea72c | 5487 | unlink(client_unix_sock_path); |
76d7553f MD |
5488 | if (client_sock >= 0) { |
5489 | ret = close(client_sock); | |
5490 | if (ret) { | |
5491 | PERROR("close"); | |
5492 | } | |
a4b35e07 MD |
5493 | } |
5494 | if (sock >= 0) { | |
76d7553f MD |
5495 | ret = close(sock); |
5496 | if (ret) { | |
5497 | PERROR("close"); | |
5498 | } | |
a4b35e07 | 5499 | } |
273ea72c | 5500 | |
5eb91c98 | 5501 | lttng_poll_clean(&events); |
a2fb29a5 | 5502 | clean_command_ctx(&cmd_ctx); |
f6a9efaa DG |
5503 | |
5504 | rcu_unregister_thread(); | |
1d4b027a DG |
5505 | return NULL; |
5506 | } | |
5507 | ||
5508 | ||
fac6795d DG |
5509 | /* |
5510 | * usage function on stderr | |
5511 | */ | |
5512 | static void usage(void) | |
5513 | { | |
b716ce68 | 5514 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
5515 | fprintf(stderr, " -h, --help Display this usage.\n"); |
5516 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
5517 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
5518 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
5519 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
5520 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
5521 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
5522 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
5523 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
5524 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
5525 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
5526 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
5527 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
5528 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
5529 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
5530 | fprintf(stderr, " -V, --version Show version number.\n"); | |
5531 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
5532 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
5533 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
3bd1e081 | 5534 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 5535 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
fac6795d DG |
5536 | } |
5537 | ||
5538 | /* | |
5539 | * daemon argument parsing | |
5540 | */ | |
5541 | static int parse_args(int argc, char **argv) | |
5542 | { | |
5543 | int c; | |
5544 | ||
5545 | static struct option long_options[] = { | |
5546 | { "client-sock", 1, 0, 'c' }, | |
5547 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
5548 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
5549 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
7753dea8 MD |
5550 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, |
5551 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
ebaeda94 MD |
5552 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, |
5553 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
5554 | { "consumerd32-path", 1, 0, 'u' }, | |
5555 | { "consumerd32-libdir", 1, 0, 'U' }, | |
5556 | { "consumerd64-path", 1, 0, 't' }, | |
5557 | { "consumerd64-libdir", 1, 0, 'T' }, | |
fac6795d | 5558 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 5559 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
5560 | { "help", 0, 0, 'h' }, |
5561 | { "group", 1, 0, 'g' }, | |
5562 | { "version", 0, 0, 'V' }, | |
75462a81 | 5563 | { "quiet", 0, 0, 'q' }, |
3f9947db | 5564 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 5565 | { "verbose-consumer", 0, 0, 'Z' }, |
4fba7219 | 5566 | { "no-kernel", 0, 0, 'N' }, |
fac6795d DG |
5567 | { NULL, 0, 0, 0 } |
5568 | }; | |
5569 | ||
5570 | while (1) { | |
5571 | int option_index = 0; | |
4fba7219 | 5572 | c = getopt_long(argc, argv, "dhqvVSN" "a:c:g:s:C:E:D:F:Z:u:t", |
54d01ffb | 5573 | long_options, &option_index); |
fac6795d DG |
5574 | if (c == -1) { |
5575 | break; | |
5576 | } | |
5577 | ||
5578 | switch (c) { | |
5579 | case 0: | |
5580 | fprintf(stderr, "option %s", long_options[option_index].name); | |
5581 | if (optarg) { | |
5582 | fprintf(stderr, " with arg %s\n", optarg); | |
5583 | } | |
5584 | break; | |
b716ce68 | 5585 | case 'c': |
fac6795d DG |
5586 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
5587 | break; | |
5588 | case 'a': | |
5589 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
5590 | break; | |
5591 | case 'd': | |
5592 | opt_daemon = 1; | |
5593 | break; | |
5594 | case 'g': | |
fb09408a | 5595 | opt_tracing_group = optarg; |
fac6795d DG |
5596 | break; |
5597 | case 'h': | |
5598 | usage(); | |
5599 | exit(EXIT_FAILURE); | |
5600 | case 'V': | |
5601 | fprintf(stdout, "%s\n", VERSION); | |
5602 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
5603 | case 'S': |
5604 | opt_sig_parent = 1; | |
5605 | break; | |
d6f42150 | 5606 | case 'E': |
3bd1e081 | 5607 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
5608 | break; |
5609 | case 'C': | |
3bd1e081 MD |
5610 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
5611 | break; | |
5612 | case 'F': | |
7753dea8 | 5613 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
3bd1e081 MD |
5614 | break; |
5615 | case 'D': | |
7753dea8 MD |
5616 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
5617 | break; | |
5618 | case 'H': | |
5619 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
5620 | break; | |
5621 | case 'G': | |
5622 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 5623 | break; |
4fba7219 DG |
5624 | case 'N': |
5625 | opt_no_kernel = 1; | |
5626 | break; | |
75462a81 | 5627 | case 'q': |
97e19046 | 5628 | lttng_opt_quiet = 1; |
75462a81 | 5629 | break; |
3f9947db | 5630 | case 'v': |
53086306 | 5631 | /* Verbose level can increase using multiple -v */ |
97e19046 | 5632 | lttng_opt_verbose += 1; |
3f9947db | 5633 | break; |
31f73cc9 | 5634 | case 'Z': |
3bd1e081 | 5635 | opt_verbose_consumer += 1; |
31f73cc9 | 5636 | break; |
fb09408a | 5637 | case 'u': |
fc7a59ce | 5638 | consumerd32_bin= optarg; |
ebaeda94 MD |
5639 | break; |
5640 | case 'U': | |
5641 | consumerd32_libdir = optarg; | |
7753dea8 MD |
5642 | break; |
5643 | case 't': | |
fc7a59ce | 5644 | consumerd64_bin = optarg; |
ebaeda94 MD |
5645 | break; |
5646 | case 'T': | |
5647 | consumerd64_libdir = optarg; | |
fb09408a | 5648 | break; |
fac6795d DG |
5649 | default: |
5650 | /* Unknown option or other error. | |
5651 | * Error is printed by getopt, just return */ | |
5652 | return -1; | |
5653 | } | |
5654 | } | |
5655 | ||
5656 | return 0; | |
5657 | } | |
5658 | ||
5659 | /* | |
d063d709 | 5660 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
5661 | * apps_sock - The communication socket for all UST apps. |
5662 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 5663 | */ |
cf3af59e | 5664 | static int init_daemon_socket(void) |
fac6795d DG |
5665 | { |
5666 | int ret = 0; | |
5667 | mode_t old_umask; | |
5668 | ||
5669 | old_umask = umask(0); | |
5670 | ||
5671 | /* Create client tool unix socket */ | |
d6f42150 DG |
5672 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
5673 | if (client_sock < 0) { | |
5674 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
5675 | ret = -1; |
5676 | goto end; | |
5677 | } | |
5678 | ||
5679 | /* File permission MUST be 660 */ | |
5680 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
5681 | if (ret < 0) { | |
d6f42150 | 5682 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 5683 | PERROR("chmod"); |
fac6795d DG |
5684 | goto end; |
5685 | } | |
5686 | ||
5687 | /* Create the application unix socket */ | |
d6f42150 DG |
5688 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
5689 | if (apps_sock < 0) { | |
5690 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
5691 | ret = -1; |
5692 | goto end; | |
5693 | } | |
5694 | ||
d6f42150 | 5695 | /* File permission MUST be 666 */ |
54d01ffb DG |
5696 | ret = chmod(apps_unix_sock_path, |
5697 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 5698 | if (ret < 0) { |
d6f42150 | 5699 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 5700 | PERROR("chmod"); |
fac6795d DG |
5701 | goto end; |
5702 | } | |
5703 | ||
5704 | end: | |
5705 | umask(old_umask); | |
5706 | return ret; | |
5707 | } | |
5708 | ||
5709 | /* | |
54d01ffb DG |
5710 | * Check if the global socket is available, and if a daemon is answering at the |
5711 | * other side. If yes, error is returned. | |
fac6795d | 5712 | */ |
cf3af59e | 5713 | static int check_existing_daemon(void) |
fac6795d | 5714 | { |
7d8234d9 | 5715 | /* Is there anybody out there ? */ |
099e26bd | 5716 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 5717 | return -EEXIST; |
099e26bd | 5718 | } |
b09c7c76 DG |
5719 | |
5720 | return 0; | |
fac6795d DG |
5721 | } |
5722 | ||
fac6795d | 5723 | /* |
d063d709 | 5724 | * Set the tracing group gid onto the client socket. |
5e16da05 | 5725 | * |
d063d709 | 5726 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 5727 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 5728 | */ |
be040666 | 5729 | static int set_permissions(char *rundir) |
fac6795d DG |
5730 | { |
5731 | int ret; | |
996b65c8 | 5732 | gid_t gid; |
fac6795d | 5733 | |
6775595e DG |
5734 | ret = allowed_group(); |
5735 | if (ret < 0) { | |
be040666 DG |
5736 | WARN("No tracing group detected"); |
5737 | ret = 0; | |
fac6795d DG |
5738 | goto end; |
5739 | } | |
5740 | ||
6775595e DG |
5741 | gid = ret; |
5742 | ||
d6f42150 | 5743 | /* Set lttng run dir */ |
be040666 | 5744 | ret = chown(rundir, 0, gid); |
d6f42150 | 5745 | if (ret < 0) { |
be040666 | 5746 | ERR("Unable to set group on %s", rundir); |
76d7553f | 5747 | PERROR("chown"); |
d6f42150 DG |
5748 | } |
5749 | ||
d1613cf5 | 5750 | /* Ensure tracing group can search the run dir */ |
61076f74 | 5751 | ret = chmod(rundir, S_IRWXU | S_IXGRP | S_IXOTH); |
d1613cf5 JN |
5752 | if (ret < 0) { |
5753 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 5754 | PERROR("chmod"); |
d1613cf5 JN |
5755 | } |
5756 | ||
d6f42150 | 5757 | /* lttng client socket path */ |
996b65c8 | 5758 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 5759 | if (ret < 0) { |
d6f42150 | 5760 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 5761 | PERROR("chown"); |
d6f42150 DG |
5762 | } |
5763 | ||
3bd1e081 MD |
5764 | /* kconsumer error socket path */ |
5765 | ret = chown(kconsumer_data.err_unix_sock_path, 0, gid); | |
d6f42150 | 5766 | if (ret < 0) { |
3bd1e081 | 5767 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 5768 | PERROR("chown"); |
3bd1e081 MD |
5769 | } |
5770 | ||
7753dea8 MD |
5771 | /* 64-bit ustconsumer error socket path */ |
5772 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, gid); | |
5773 | if (ret < 0) { | |
5774 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 5775 | PERROR("chown"); |
7753dea8 MD |
5776 | } |
5777 | ||
5778 | /* 32-bit ustconsumer compat32 error socket path */ | |
5779 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, gid); | |
3bd1e081 | 5780 | if (ret < 0) { |
7753dea8 | 5781 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 5782 | PERROR("chown"); |
fac6795d DG |
5783 | } |
5784 | ||
d6f42150 | 5785 | DBG("All permissions are set"); |
e07ae692 | 5786 | |
fac6795d DG |
5787 | end: |
5788 | return ret; | |
5789 | } | |
5790 | ||
d6f42150 | 5791 | /* |
d063d709 | 5792 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 5793 | */ |
67e40797 | 5794 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
5795 | { |
5796 | int ret; | |
5797 | ||
67e40797 DG |
5798 | DBG3("Creating LTTng run directory: %s", rundir); |
5799 | ||
d1613cf5 | 5800 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 5801 | if (ret < 0) { |
b1f11e69 | 5802 | if (errno != EEXIST) { |
67e40797 | 5803 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
5804 | goto error; |
5805 | } else { | |
5806 | ret = 0; | |
5807 | } | |
d6f42150 DG |
5808 | } |
5809 | ||
5810 | error: | |
5811 | return ret; | |
5812 | } | |
5813 | ||
5814 | /* | |
d063d709 DG |
5815 | * Setup sockets and directory needed by the kconsumerd communication with the |
5816 | * session daemon. | |
d6f42150 | 5817 | */ |
67e40797 DG |
5818 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
5819 | const char *rundir) | |
d6f42150 DG |
5820 | { |
5821 | int ret; | |
67e40797 | 5822 | char path[PATH_MAX]; |
d6f42150 | 5823 | |
67e40797 | 5824 | switch (consumer_data->type) { |
7753dea8 | 5825 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 5826 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
5827 | break; |
5828 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 5829 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
5830 | break; |
5831 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 5832 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
5833 | break; |
5834 | default: | |
5835 | ERR("Consumer type unknown"); | |
5836 | ret = -EINVAL; | |
5837 | goto error; | |
d6f42150 DG |
5838 | } |
5839 | ||
67e40797 DG |
5840 | DBG2("Creating consumer directory: %s", path); |
5841 | ||
d1613cf5 | 5842 | ret = mkdir(path, S_IRWXU); |
d6f42150 | 5843 | if (ret < 0) { |
6beb2242 | 5844 | if (errno != EEXIST) { |
f11e84c2 | 5845 | PERROR("mkdir"); |
3bd1e081 | 5846 | ERR("Failed to create %s", path); |
6beb2242 DG |
5847 | goto error; |
5848 | } | |
f11e84c2 | 5849 | ret = -1; |
d6f42150 DG |
5850 | } |
5851 | ||
5852 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
5853 | consumer_data->err_sock = |
5854 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
5855 | if (consumer_data->err_sock < 0) { | |
5856 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
5857 | ret = -1; |
5858 | goto error; | |
5859 | } | |
5860 | ||
5861 | /* File permission MUST be 660 */ | |
3bd1e081 | 5862 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 5863 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 5864 | if (ret < 0) { |
3bd1e081 | 5865 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 5866 | PERROR("chmod"); |
d6f42150 DG |
5867 | goto error; |
5868 | } | |
5869 | ||
5870 | error: | |
5871 | return ret; | |
5872 | } | |
5873 | ||
fac6795d | 5874 | /* |
d063d709 | 5875 | * Signal handler for the daemon |
cf3af59e | 5876 | * |
54d01ffb DG |
5877 | * Simply stop all worker threads, leaving main() return gracefully after |
5878 | * joining all threads and calling cleanup(). | |
fac6795d DG |
5879 | */ |
5880 | static void sighandler(int sig) | |
5881 | { | |
5882 | switch (sig) { | |
cf3af59e | 5883 | case SIGPIPE: |
af87c45a | 5884 | DBG("SIGPIPE caught"); |
cf3af59e MD |
5885 | return; |
5886 | case SIGINT: | |
af87c45a | 5887 | DBG("SIGINT caught"); |
cf3af59e MD |
5888 | stop_threads(); |
5889 | break; | |
5890 | case SIGTERM: | |
af87c45a | 5891 | DBG("SIGTERM caught"); |
cf3af59e MD |
5892 | stop_threads(); |
5893 | break; | |
5894 | default: | |
5895 | break; | |
fac6795d | 5896 | } |
fac6795d DG |
5897 | } |
5898 | ||
5899 | /* | |
d063d709 | 5900 | * Setup signal handler for : |
1d4b027a | 5901 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 5902 | */ |
1d4b027a | 5903 | static int set_signal_handler(void) |
fac6795d | 5904 | { |
1d4b027a DG |
5905 | int ret = 0; |
5906 | struct sigaction sa; | |
5907 | sigset_t sigset; | |
fac6795d | 5908 | |
1d4b027a | 5909 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 5910 | PERROR("sigemptyset"); |
1d4b027a DG |
5911 | return ret; |
5912 | } | |
d6f42150 | 5913 | |
1d4b027a DG |
5914 | sa.sa_handler = sighandler; |
5915 | sa.sa_mask = sigset; | |
5916 | sa.sa_flags = 0; | |
5917 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 5918 | PERROR("sigaction"); |
1d4b027a | 5919 | return ret; |
d6f42150 DG |
5920 | } |
5921 | ||
1d4b027a | 5922 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 5923 | PERROR("sigaction"); |
1d4b027a | 5924 | return ret; |
d6f42150 | 5925 | } |
aaf26714 | 5926 | |
1d4b027a | 5927 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 5928 | PERROR("sigaction"); |
1d4b027a | 5929 | return ret; |
8c0faa1d DG |
5930 | } |
5931 | ||
1d4b027a DG |
5932 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
5933 | ||
5934 | return ret; | |
fac6795d DG |
5935 | } |
5936 | ||
f3ed775e | 5937 | /* |
d063d709 DG |
5938 | * Set open files limit to unlimited. This daemon can open a large number of |
5939 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
5940 | */ |
5941 | static void set_ulimit(void) | |
5942 | { | |
5943 | int ret; | |
5944 | struct rlimit lim; | |
5945 | ||
a88df331 | 5946 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
5947 | lim.rlim_cur = 65535; |
5948 | lim.rlim_max = 65535; | |
5949 | ||
5950 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
5951 | if (ret < 0) { | |
76d7553f | 5952 | PERROR("failed to set open files limit"); |
f3ed775e DG |
5953 | } |
5954 | } | |
5955 | ||
fac6795d DG |
5956 | /* |
5957 | * main | |
5958 | */ | |
5959 | int main(int argc, char **argv) | |
5960 | { | |
fac6795d DG |
5961 | int ret = 0; |
5962 | void *status; | |
b082db07 | 5963 | const char *home_path; |
fac6795d | 5964 | |
335a95b7 MD |
5965 | init_kernel_workarounds(); |
5966 | ||
f6a9efaa DG |
5967 | rcu_register_thread(); |
5968 | ||
7753dea8 | 5969 | setup_consumerd_path(); |
fb09408a | 5970 | |
fac6795d DG |
5971 | /* Parse arguments */ |
5972 | progname = argv[0]; | |
5973 | if ((ret = parse_args(argc, argv) < 0)) { | |
cf3af59e | 5974 | goto error; |
fac6795d DG |
5975 | } |
5976 | ||
5977 | /* Daemonize */ | |
5978 | if (opt_daemon) { | |
ceed52b5 MD |
5979 | int i; |
5980 | ||
5981 | /* | |
5982 | * fork | |
5983 | * child: setsid, close FD 0, 1, 2, chdir / | |
5984 | * parent: exit (if fork is successful) | |
5985 | */ | |
53094c05 DG |
5986 | ret = daemon(0, 0); |
5987 | if (ret < 0) { | |
76d7553f | 5988 | PERROR("daemon"); |
cf3af59e | 5989 | goto error; |
53094c05 | 5990 | } |
ceed52b5 MD |
5991 | /* |
5992 | * We are in the child. Make sure all other file | |
5993 | * descriptors are closed, in case we are called with | |
5994 | * more opened file descriptors than the standard ones. | |
5995 | */ | |
5996 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
5997 | (void) close(i); | |
5998 | } | |
5999 | } | |
6000 | ||
6001 | /* Create thread quit pipe */ | |
6002 | if ((ret = init_thread_quit_pipe()) < 0) { | |
6003 | goto error; | |
fac6795d DG |
6004 | } |
6005 | ||
6006 | /* Check if daemon is UID = 0 */ | |
6007 | is_root = !getuid(); | |
6008 | ||
fac6795d | 6009 | if (is_root) { |
990570ed | 6010 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
6011 | |
6012 | /* Create global run dir with root access */ | |
6013 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 6014 | if (ret < 0) { |
cf3af59e | 6015 | goto error; |
d6f42150 DG |
6016 | } |
6017 | ||
fac6795d | 6018 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
6019 | snprintf(apps_unix_sock_path, PATH_MAX, |
6020 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
6021 | } |
6022 | ||
6023 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
6024 | snprintf(client_unix_sock_path, PATH_MAX, |
6025 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
6026 | } | |
0fdd1e2c DG |
6027 | |
6028 | /* Set global SHM for ust */ | |
6029 | if (strlen(wait_shm_path) == 0) { | |
6030 | snprintf(wait_shm_path, PATH_MAX, | |
6031 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
6032 | } | |
67e40797 | 6033 | |
44a5e5eb DG |
6034 | if (strlen(health_unix_sock_path) == 0) { |
6035 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
6036 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); | |
6037 | } | |
6038 | ||
67e40797 DG |
6039 | /* Setup kernel consumerd path */ |
6040 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 6041 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 6042 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 6043 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
6044 | |
6045 | DBG2("Kernel consumer err path: %s", | |
6046 | kconsumer_data.err_unix_sock_path); | |
6047 | DBG2("Kernel consumer cmd path: %s", | |
6048 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 6049 | } else { |
b082db07 DG |
6050 | home_path = get_home_dir(); |
6051 | if (home_path == NULL) { | |
273ea72c DG |
6052 | /* TODO: Add --socket PATH option */ |
6053 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
6054 | ret = -EPERM; |
6055 | goto error; | |
b082db07 DG |
6056 | } |
6057 | ||
67e40797 DG |
6058 | /* |
6059 | * Create rundir from home path. This will create something like | |
6060 | * $HOME/.lttng | |
6061 | */ | |
990570ed | 6062 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
6063 | if (ret < 0) { |
6064 | ret = -ENOMEM; | |
6065 | goto error; | |
6066 | } | |
6067 | ||
6068 | ret = create_lttng_rundir(rundir); | |
6069 | if (ret < 0) { | |
6070 | goto error; | |
6071 | } | |
6072 | ||
fac6795d | 6073 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 6074 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 6075 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
6076 | } |
6077 | ||
6078 | /* Set the cli tool unix socket path */ | |
6079 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 6080 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 6081 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 6082 | } |
0fdd1e2c DG |
6083 | |
6084 | /* Set global SHM for ust */ | |
6085 | if (strlen(wait_shm_path) == 0) { | |
6086 | snprintf(wait_shm_path, PATH_MAX, | |
6087 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, geteuid()); | |
6088 | } | |
44a5e5eb DG |
6089 | |
6090 | /* Set health check Unix path */ | |
6091 | if (strlen(health_unix_sock_path) == 0) { | |
6092 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
6093 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path); | |
6094 | } | |
fac6795d DG |
6095 | } |
6096 | ||
5c827ce0 DG |
6097 | /* Set consumer initial state */ |
6098 | kernel_consumerd_state = CONSUMER_STOPPED; | |
6099 | ust_consumerd_state = CONSUMER_STOPPED; | |
6100 | ||
847177cd DG |
6101 | DBG("Client socket path %s", client_unix_sock_path); |
6102 | DBG("Application socket path %s", apps_unix_sock_path); | |
67e40797 DG |
6103 | DBG("LTTng run directory path: %s", rundir); |
6104 | ||
6105 | /* 32 bits consumerd path setup */ | |
6106 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 6107 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 6108 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 6109 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
6110 | |
6111 | DBG2("UST consumer 32 bits err path: %s", | |
6112 | ustconsumer32_data.err_unix_sock_path); | |
6113 | DBG2("UST consumer 32 bits cmd path: %s", | |
6114 | ustconsumer32_data.cmd_unix_sock_path); | |
6115 | ||
6116 | /* 64 bits consumerd path setup */ | |
6117 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 6118 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 6119 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 6120 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
6121 | |
6122 | DBG2("UST consumer 64 bits err path: %s", | |
6123 | ustconsumer64_data.err_unix_sock_path); | |
6124 | DBG2("UST consumer 64 bits cmd path: %s", | |
6125 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 6126 | |
273ea72c | 6127 | /* |
7d8234d9 | 6128 | * See if daemon already exist. |
fac6795d | 6129 | */ |
7d8234d9 | 6130 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 6131 | ERR("Already running daemon.\n"); |
273ea72c | 6132 | /* |
cf3af59e MD |
6133 | * We do not goto exit because we must not cleanup() |
6134 | * because a daemon is already running. | |
ab118b20 | 6135 | */ |
cf3af59e | 6136 | goto error; |
a88df331 DG |
6137 | } |
6138 | ||
1427f9b2 DG |
6139 | /* |
6140 | * Init UST app hash table. Alloc hash table before this point since | |
6141 | * cleanup() can get called after that point. | |
6142 | */ | |
6143 | ust_app_ht_alloc(); | |
6144 | ||
54d01ffb | 6145 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
6146 | |
6147 | /* | |
6148 | * These actions must be executed as root. We do that *after* setting up | |
6149 | * the sockets path because we MUST make the check for another daemon using | |
6150 | * those paths *before* trying to set the kernel consumer sockets and init | |
6151 | * kernel tracer. | |
6152 | */ | |
6153 | if (is_root) { | |
67e40797 | 6154 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
6155 | if (ret < 0) { |
6156 | goto exit; | |
6157 | } | |
6158 | ||
a88df331 | 6159 | /* Setup kernel tracer */ |
4fba7219 DG |
6160 | if (!opt_no_kernel) { |
6161 | init_kernel_tracer(); | |
6162 | } | |
a88df331 DG |
6163 | |
6164 | /* Set ulimit for open files */ | |
6165 | set_ulimit(); | |
fac6795d | 6166 | } |
4063050c MD |
6167 | /* init lttng_fd tracking must be done after set_ulimit. */ |
6168 | lttng_fd_init(); | |
fac6795d | 6169 | |
67e40797 DG |
6170 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
6171 | if (ret < 0) { | |
6172 | goto exit; | |
6173 | } | |
6174 | ||
6175 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
6176 | if (ret < 0) { | |
6177 | goto exit; | |
6178 | } | |
6179 | ||
cf3af59e MD |
6180 | if ((ret = set_signal_handler()) < 0) { |
6181 | goto exit; | |
fac6795d DG |
6182 | } |
6183 | ||
d6f42150 | 6184 | /* Setup the needed unix socket */ |
cf3af59e MD |
6185 | if ((ret = init_daemon_socket()) < 0) { |
6186 | goto exit; | |
fac6795d DG |
6187 | } |
6188 | ||
6189 | /* Set credentials to socket */ | |
be040666 | 6190 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 6191 | goto exit; |
fac6795d DG |
6192 | } |
6193 | ||
5b8719f5 DG |
6194 | /* Get parent pid if -S, --sig-parent is specified. */ |
6195 | if (opt_sig_parent) { | |
6196 | ppid = getppid(); | |
6197 | } | |
6198 | ||
7a485870 | 6199 | /* Setup the kernel pipe for waking up the kernel thread */ |
ef599319 | 6200 | if ((ret = utils_create_pipe_cloexec(kernel_poll_pipe)) < 0) { |
cf3af59e | 6201 | goto exit; |
7a485870 DG |
6202 | } |
6203 | ||
099e26bd | 6204 | /* Setup the thread apps communication pipe. */ |
ef599319 | 6205 | if ((ret = utils_create_pipe_cloexec(apps_cmd_pipe)) < 0) { |
099e26bd DG |
6206 | goto exit; |
6207 | } | |
6208 | ||
6209 | /* Init UST command queue. */ | |
6210 | cds_wfq_init(&ust_cmd_queue.queue); | |
6211 | ||
273ea72c | 6212 | /* |
54d01ffb DG |
6213 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
6214 | * statically declared in session.c | |
273ea72c | 6215 | */ |
54d01ffb | 6216 | session_list_ptr = session_get_list(); |
b5541356 | 6217 | |
5eb91c98 DG |
6218 | /* Set up max poll set size */ |
6219 | lttng_poll_set_max_size(); | |
6220 | ||
00e2e675 DG |
6221 | /* |
6222 | * Set network sequence index to 1 for streams to match a relayd socket on | |
6223 | * the consumer side. | |
6224 | */ | |
6225 | uatomic_set(&relayd_net_seq_idx, 1); | |
6226 | ||
44a5e5eb DG |
6227 | /* Init all health thread counters. */ |
6228 | health_init(&health_thread_cmd); | |
6229 | health_init(&health_thread_kernel); | |
139ac872 | 6230 | health_init(&health_thread_app_manage); |
44a5e5eb DG |
6231 | health_init(&health_thread_app_reg); |
6232 | ||
6233 | /* | |
6234 | * Init health counters of the consumer thread. We do a quick hack here to | |
6235 | * the state of the consumer health is fine even if the thread is not | |
6236 | * started. This is simply to ease our life and has no cost what so ever. | |
6237 | */ | |
6238 | health_init(&kconsumer_data.health); | |
6239 | health_poll_update(&kconsumer_data.health); | |
6240 | health_init(&ustconsumer32_data.health); | |
6241 | health_poll_update(&ustconsumer32_data.health); | |
6242 | health_init(&ustconsumer64_data.health); | |
6243 | health_poll_update(&ustconsumer64_data.health); | |
6244 | ||
6245 | /* Create thread to manage the client socket */ | |
6246 | ret = pthread_create(&health_thread, NULL, | |
6247 | thread_manage_health, (void *) NULL); | |
6248 | if (ret != 0) { | |
6249 | PERROR("pthread_create health"); | |
6250 | goto exit_health; | |
6251 | } | |
6252 | ||
cf3af59e | 6253 | /* Create thread to manage the client socket */ |
099e26bd DG |
6254 | ret = pthread_create(&client_thread, NULL, |
6255 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 6256 | if (ret != 0) { |
76d7553f | 6257 | PERROR("pthread_create clients"); |
cf3af59e MD |
6258 | goto exit_client; |
6259 | } | |
fac6795d | 6260 | |
099e26bd DG |
6261 | /* Create thread to dispatch registration */ |
6262 | ret = pthread_create(&dispatch_thread, NULL, | |
6263 | thread_dispatch_ust_registration, (void *) NULL); | |
6264 | if (ret != 0) { | |
76d7553f | 6265 | PERROR("pthread_create dispatch"); |
099e26bd DG |
6266 | goto exit_dispatch; |
6267 | } | |
6268 | ||
6269 | /* Create thread to manage application registration. */ | |
6270 | ret = pthread_create(®_apps_thread, NULL, | |
6271 | thread_registration_apps, (void *) NULL); | |
6272 | if (ret != 0) { | |
76d7553f | 6273 | PERROR("pthread_create registration"); |
099e26bd DG |
6274 | goto exit_reg_apps; |
6275 | } | |
6276 | ||
cf3af59e | 6277 | /* Create thread to manage application socket */ |
54d01ffb DG |
6278 | ret = pthread_create(&apps_thread, NULL, |
6279 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 6280 | if (ret != 0) { |
76d7553f | 6281 | PERROR("pthread_create apps"); |
cf3af59e MD |
6282 | goto exit_apps; |
6283 | } | |
fac6795d | 6284 | |
cf3af59e | 6285 | /* Create kernel thread to manage kernel event */ |
54d01ffb DG |
6286 | ret = pthread_create(&kernel_thread, NULL, |
6287 | thread_manage_kernel, (void *) NULL); | |
cf3af59e | 6288 | if (ret != 0) { |
76d7553f | 6289 | PERROR("pthread_create kernel"); |
cf3af59e MD |
6290 | goto exit_kernel; |
6291 | } | |
7a485870 | 6292 | |
cf3af59e MD |
6293 | ret = pthread_join(kernel_thread, &status); |
6294 | if (ret != 0) { | |
76d7553f | 6295 | PERROR("pthread_join"); |
cf3af59e | 6296 | goto error; /* join error, exit without cleanup */ |
fac6795d DG |
6297 | } |
6298 | ||
cf3af59e MD |
6299 | exit_kernel: |
6300 | ret = pthread_join(apps_thread, &status); | |
6301 | if (ret != 0) { | |
76d7553f | 6302 | PERROR("pthread_join"); |
cf3af59e MD |
6303 | goto error; /* join error, exit without cleanup */ |
6304 | } | |
fac6795d | 6305 | |
cf3af59e | 6306 | exit_apps: |
099e26bd DG |
6307 | ret = pthread_join(reg_apps_thread, &status); |
6308 | if (ret != 0) { | |
76d7553f | 6309 | PERROR("pthread_join"); |
099e26bd DG |
6310 | goto error; /* join error, exit without cleanup */ |
6311 | } | |
6312 | ||
6313 | exit_reg_apps: | |
6314 | ret = pthread_join(dispatch_thread, &status); | |
6315 | if (ret != 0) { | |
76d7553f | 6316 | PERROR("pthread_join"); |
099e26bd DG |
6317 | goto error; /* join error, exit without cleanup */ |
6318 | } | |
6319 | ||
6320 | exit_dispatch: | |
cf3af59e MD |
6321 | ret = pthread_join(client_thread, &status); |
6322 | if (ret != 0) { | |
76d7553f | 6323 | PERROR("pthread_join"); |
cf3af59e MD |
6324 | goto error; /* join error, exit without cleanup */ |
6325 | } | |
6326 | ||
3bd1e081 | 6327 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 6328 | if (ret != 0) { |
76d7553f | 6329 | PERROR("join_consumer"); |
cf3af59e MD |
6330 | goto error; /* join error, exit without cleanup */ |
6331 | } | |
a88df331 | 6332 | |
cf3af59e | 6333 | exit_client: |
44a5e5eb | 6334 | exit_health: |
a88df331 | 6335 | exit: |
cf3af59e MD |
6336 | /* |
6337 | * cleanup() is called when no other thread is running. | |
6338 | */ | |
f6a9efaa | 6339 | rcu_thread_online(); |
cf3af59e | 6340 | cleanup(); |
f6a9efaa DG |
6341 | rcu_thread_offline(); |
6342 | rcu_unregister_thread(); | |
67e40797 | 6343 | if (!ret) { |
cf3af59e | 6344 | exit(EXIT_SUCCESS); |
67e40797 | 6345 | } |
cf3af59e | 6346 | error: |
5e16da05 | 6347 | exit(EXIT_FAILURE); |
fac6795d | 6348 | } |