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d4a1283e JD |
1 | /* |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License | |
82a3637f DG |
7 | * as published by the Free Software Foundation; only version 2 |
8 | * of the License. | |
d4a1283e JD |
9 | * |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
18 | */ | |
19 | ||
20 | #define _GNU_SOURCE | |
21 | #include <fcntl.h> | |
22 | #include <getopt.h> | |
23 | #include <grp.h> | |
24 | #include <limits.h> | |
25 | #include <pthread.h> | |
26 | #include <signal.h> | |
27 | #include <stdio.h> | |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
30 | #include <sys/ipc.h> | |
31 | #include <sys/shm.h> | |
32 | #include <sys/socket.h> | |
33 | #include <sys/stat.h> | |
34 | #include <sys/types.h> | |
35 | #include <urcu/list.h> | |
36 | #include <poll.h> | |
37 | #include <unistd.h> | |
03424a9b | 38 | #include <sys/mman.h> |
5348b470 | 39 | #include <assert.h> |
3bd1e081 | 40 | #include <config.h> |
7753dea8 | 41 | #include <urcu/compiler.h> |
d4a1283e | 42 | |
3bd1e081 | 43 | #include <lttng-consumerd.h> |
1e307fab DG |
44 | #include <lttng-kernel-ctl.h> |
45 | #include <lttng-sessiond-comm.h> | |
3bd1e081 MD |
46 | #include <lttng/lttng-kconsumer.h> |
47 | #include <lttng/lttng-ustconsumer.h> | |
1e307fab | 48 | #include <lttngerr.h> |
d4a1283e | 49 | |
3bd1e081 MD |
50 | /* TODO : support UST (all direct kernctl accesses). */ |
51 | ||
d4a1283e | 52 | /* the two threads (receive fd and poll) */ |
6533b585 | 53 | static pthread_t threads[2]; |
d4a1283e | 54 | |
13e44745 JD |
55 | /* to count the number of time the user pressed ctrl+c */ |
56 | static int sigintcount = 0; | |
57 | ||
d4a1283e JD |
58 | /* Argument variables */ |
59 | int opt_quiet; | |
60 | int opt_verbose; | |
61 | static int opt_daemon; | |
62 | static const char *progname; | |
6533b585 DG |
63 | static char command_sock_path[PATH_MAX]; /* Global command socket path */ |
64 | static char error_sock_path[PATH_MAX]; /* Global error path */ | |
3bd1e081 | 65 | static enum lttng_consumer_type opt_type = LTTNG_CONSUMER_KERNEL; |
d4a1283e | 66 | |
7753dea8 | 67 | /* the liblttngconsumerd context */ |
3bd1e081 | 68 | static struct lttng_consumer_local_data *ctx; |
cb040cc1 | 69 | |
d4a1283e | 70 | /* |
6533b585 | 71 | * Signal handler for the daemon |
d4a1283e JD |
72 | */ |
73 | static void sighandler(int sig) | |
74 | { | |
13e44745 JD |
75 | if (sig == SIGINT && sigintcount++ == 0) { |
76 | DBG("ignoring first SIGINT"); | |
77 | return; | |
78 | } | |
79 | ||
3bd1e081 | 80 | lttng_consumer_should_exit(ctx); |
d4a1283e JD |
81 | } |
82 | ||
83 | /* | |
6533b585 | 84 | * Setup signal handler for : |
d4a1283e JD |
85 | * SIGINT, SIGTERM, SIGPIPE |
86 | */ | |
87 | static int set_signal_handler(void) | |
88 | { | |
89 | int ret = 0; | |
90 | struct sigaction sa; | |
91 | sigset_t sigset; | |
92 | ||
93 | if ((ret = sigemptyset(&sigset)) < 0) { | |
94 | perror("sigemptyset"); | |
95 | return ret; | |
96 | } | |
97 | ||
98 | sa.sa_handler = sighandler; | |
99 | sa.sa_mask = sigset; | |
100 | sa.sa_flags = 0; | |
101 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
102 | perror("sigaction"); | |
103 | return ret; | |
104 | } | |
105 | ||
106 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { | |
107 | perror("sigaction"); | |
108 | return ret; | |
109 | } | |
110 | ||
111 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
112 | perror("sigaction"); | |
113 | return ret; | |
114 | } | |
115 | ||
116 | return ret; | |
117 | } | |
118 | ||
d4a1283e JD |
119 | /* |
120 | * usage function on stderr | |
121 | */ | |
122 | static void usage(void) | |
123 | { | |
124 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); | |
125 | fprintf(stderr, " -h, --help " | |
126 | "Display this usage.\n"); | |
7753dea8 | 127 | fprintf(stderr, " -c, --consumerd-cmd-sock PATH " |
d4a1283e | 128 | "Specify path for the command socket\n"); |
7753dea8 | 129 | fprintf(stderr, " -e, --consumerd-err-sock PATH " |
d4a1283e JD |
130 | "Specify path for the error socket\n"); |
131 | fprintf(stderr, " -d, --daemonize " | |
132 | "Start as a daemon.\n"); | |
133 | fprintf(stderr, " -q, --quiet " | |
134 | "No output at all.\n"); | |
135 | fprintf(stderr, " -v, --verbose " | |
136 | "Verbose mode. Activate DBG() macro.\n"); | |
137 | fprintf(stderr, " -V, --version " | |
138 | "Show version number.\n"); | |
3bd1e081 MD |
139 | fprintf(stderr, " -k, --kernel " |
140 | "Consumer kernel buffers (default).\n"); | |
141 | fprintf(stderr, " -u, --ust " | |
142 | "Consumer UST buffers.%s\n", | |
74d0b642 | 143 | #ifdef HAVE_LIBLTTNG_UST_CTL |
3bd1e081 MD |
144 | "" |
145 | #else | |
146 | " (support not compiled in)" | |
147 | #endif | |
148 | ); | |
d4a1283e JD |
149 | } |
150 | ||
151 | /* | |
152 | * daemon argument parsing | |
153 | */ | |
154 | static void parse_args(int argc, char **argv) | |
155 | { | |
156 | int c; | |
157 | ||
158 | static struct option long_options[] = { | |
7753dea8 MD |
159 | { "consumerd-cmd-sock", 1, 0, 'c' }, |
160 | { "consumerd-err-sock", 1, 0, 'e' }, | |
d4a1283e JD |
161 | { "daemonize", 0, 0, 'd' }, |
162 | { "help", 0, 0, 'h' }, | |
163 | { "quiet", 0, 0, 'q' }, | |
164 | { "verbose", 0, 0, 'v' }, | |
165 | { "version", 0, 0, 'V' }, | |
3bd1e081 | 166 | { "kernel", 0, 0, 'k' }, |
74d0b642 | 167 | #ifdef HAVE_LIBLTTNG_UST_CTL |
3bd1e081 MD |
168 | { "ust", 0, 0, 'u' }, |
169 | #endif | |
d4a1283e JD |
170 | { NULL, 0, 0, 0 } |
171 | }; | |
172 | ||
173 | while (1) { | |
174 | int option_index = 0; | |
3bd1e081 | 175 | c = getopt_long(argc, argv, "dhqvVku" "c:e:", long_options, &option_index); |
d4a1283e JD |
176 | if (c == -1) { |
177 | break; | |
178 | } | |
179 | ||
180 | switch (c) { | |
914a571b JD |
181 | case 0: |
182 | fprintf(stderr, "option %s", long_options[option_index].name); | |
183 | if (optarg) { | |
184 | fprintf(stderr, " with arg %s\n", optarg); | |
185 | } | |
186 | break; | |
187 | case 'c': | |
188 | snprintf(command_sock_path, PATH_MAX, "%s", optarg); | |
189 | break; | |
190 | case 'e': | |
191 | snprintf(error_sock_path, PATH_MAX, "%s", optarg); | |
192 | break; | |
193 | case 'd': | |
194 | opt_daemon = 1; | |
195 | break; | |
196 | case 'h': | |
197 | usage(); | |
198 | exit(EXIT_FAILURE); | |
199 | case 'q': | |
200 | opt_quiet = 1; | |
201 | break; | |
202 | case 'v': | |
203 | opt_verbose = 1; | |
204 | break; | |
205 | case 'V': | |
206 | fprintf(stdout, "%s\n", VERSION); | |
207 | exit(EXIT_SUCCESS); | |
3bd1e081 MD |
208 | case 'k': |
209 | opt_type = LTTNG_CONSUMER_KERNEL; | |
210 | break; | |
74d0b642 | 211 | #ifdef HAVE_LIBLTTNG_UST_CTL |
3bd1e081 | 212 | case 'u': |
7753dea8 MD |
213 | # if (CAA_BITS_PER_LONG == 64) |
214 | opt_type = LTTNG_CONSUMER64_UST; | |
215 | # elif (CAA_BITS_PER_LONG == 32) | |
216 | opt_type = LTTNG_CONSUMER32_UST; | |
217 | # else | |
218 | # error "Unknown bitness" | |
219 | # endif | |
3bd1e081 MD |
220 | break; |
221 | #endif | |
914a571b JD |
222 | default: |
223 | usage(); | |
224 | exit(EXIT_FAILURE); | |
d4a1283e JD |
225 | } |
226 | } | |
227 | } | |
228 | ||
d4a1283e JD |
229 | /* |
230 | * main | |
231 | */ | |
232 | int main(int argc, char **argv) | |
233 | { | |
234 | int i; | |
235 | int ret = 0; | |
236 | void *status; | |
237 | ||
238 | /* Parse arguments */ | |
239 | progname = argv[0]; | |
240 | parse_args(argc, argv); | |
241 | ||
242 | /* Daemonize */ | |
243 | if (opt_daemon) { | |
244 | ret = daemon(0, 0); | |
245 | if (ret < 0) { | |
246 | perror("daemon"); | |
247 | goto error; | |
248 | } | |
249 | } | |
250 | ||
251 | if (strlen(command_sock_path) == 0) { | |
7753dea8 MD |
252 | switch (opt_type) { |
253 | case LTTNG_CONSUMER_KERNEL: | |
67e40797 DG |
254 | snprintf(command_sock_path, PATH_MAX, KCONSUMERD_CMD_SOCK_PATH, |
255 | LTTNG_RUNDIR); | |
7753dea8 MD |
256 | break; |
257 | case LTTNG_CONSUMER64_UST: | |
67e40797 DG |
258 | snprintf(command_sock_path, PATH_MAX, |
259 | USTCONSUMERD64_CMD_SOCK_PATH, LTTNG_RUNDIR); | |
7753dea8 MD |
260 | break; |
261 | case LTTNG_CONSUMER32_UST: | |
67e40797 DG |
262 | snprintf(command_sock_path, PATH_MAX, |
263 | USTCONSUMERD32_CMD_SOCK_PATH, LTTNG_RUNDIR); | |
7753dea8 MD |
264 | break; |
265 | default: | |
266 | WARN("Unknown consumerd type"); | |
267 | goto error; | |
268 | } | |
d4a1283e | 269 | } |
e4421fec DG |
270 | |
271 | /* Init */ | |
272 | lttng_consumer_init(); | |
273 | ||
5348b470 | 274 | /* create the consumer instance with and assign the callbacks */ |
d41f73b7 MD |
275 | ctx = lttng_consumer_create(opt_type, lttng_consumer_read_subbuffer, |
276 | NULL, lttng_consumer_on_recv_stream, NULL); | |
cb040cc1 JD |
277 | if (ctx == NULL) { |
278 | goto error; | |
279 | } | |
280 | ||
3bd1e081 | 281 | lttng_consumer_set_command_sock_path(ctx, command_sock_path); |
d4a1283e | 282 | if (strlen(error_sock_path) == 0) { |
7753dea8 MD |
283 | switch (opt_type) { |
284 | case LTTNG_CONSUMER_KERNEL: | |
67e40797 DG |
285 | snprintf(error_sock_path, PATH_MAX, KCONSUMERD_ERR_SOCK_PATH, |
286 | LTTNG_RUNDIR); | |
7753dea8 MD |
287 | break; |
288 | case LTTNG_CONSUMER64_UST: | |
67e40797 DG |
289 | snprintf(error_sock_path, PATH_MAX, |
290 | USTCONSUMERD64_ERR_SOCK_PATH, LTTNG_RUNDIR); | |
7753dea8 MD |
291 | break; |
292 | case LTTNG_CONSUMER32_UST: | |
67e40797 DG |
293 | snprintf(error_sock_path, PATH_MAX, |
294 | USTCONSUMERD32_ERR_SOCK_PATH, LTTNG_RUNDIR); | |
7753dea8 MD |
295 | break; |
296 | default: | |
297 | WARN("Unknown consumerd type"); | |
298 | goto error; | |
299 | } | |
d4a1283e JD |
300 | } |
301 | ||
302 | if (set_signal_handler() < 0) { | |
303 | goto error; | |
304 | } | |
305 | ||
32258573 | 306 | /* Connect to the socket created by lttng-sessiond to report errors */ |
d4a1283e | 307 | DBG("Connecting to error socket %s", error_sock_path); |
1ce86c9a | 308 | ret = lttcomm_connect_unix_sock(error_sock_path); |
32258573 | 309 | /* not a fatal error, but all communication with lttng-sessiond will fail */ |
1ce86c9a | 310 | if (ret < 0) { |
32258573 | 311 | WARN("Cannot connect to error socket, is lttng-sessiond started ?"); |
d4a1283e | 312 | } |
3bd1e081 | 313 | lttng_consumer_set_error_sock(ctx, ret); |
d4a1283e JD |
314 | |
315 | /* Create the thread to manage the receive of fd */ | |
3bd1e081 | 316 | ret = pthread_create(&threads[0], NULL, lttng_consumer_thread_receive_fds, |
cb040cc1 | 317 | (void *) ctx); |
d4a1283e JD |
318 | if (ret != 0) { |
319 | perror("pthread_create"); | |
320 | goto error; | |
321 | } | |
322 | ||
323 | /* Create thread to manage the polling/writing of traces */ | |
3bd1e081 | 324 | ret = pthread_create(&threads[1], NULL, lttng_consumer_thread_poll_fds, |
cb040cc1 | 325 | (void *) ctx); |
d4a1283e JD |
326 | if (ret != 0) { |
327 | perror("pthread_create"); | |
328 | goto error; | |
329 | } | |
330 | ||
331 | for (i = 0; i < 2; i++) { | |
332 | ret = pthread_join(threads[i], &status); | |
333 | if (ret != 0) { | |
334 | perror("pthread_join"); | |
335 | goto error; | |
336 | } | |
337 | } | |
338 | ret = EXIT_SUCCESS; | |
3bd1e081 | 339 | lttng_consumer_send_error(ctx, CONSUMERD_EXIT_SUCCESS); |
d4a1283e JD |
340 | goto end; |
341 | ||
342 | error: | |
343 | ret = EXIT_FAILURE; | |
3bd1e081 | 344 | lttng_consumer_send_error(ctx, CONSUMERD_EXIT_FAILURE); |
d4a1283e JD |
345 | |
346 | end: | |
3bd1e081 MD |
347 | lttng_consumer_destroy(ctx); |
348 | lttng_consumer_cleanup(); | |
d4a1283e JD |
349 | |
350 | return ret; | |
351 | } |