Commit | Line | Data |
---|---|---|
f3ed775e DG |
1 | /* |
2 | * Copyright (c) 2011 David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
f3ed775e DG |
7 | * |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along | |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
b9dfb167 | 19 | #include <assert.h> |
f3ed775e | 20 | #include <stdlib.h> |
679b4943 | 21 | #include <ctype.h> |
3badf2bf | 22 | #include <limits.h> |
8960e9cd DG |
23 | #include <sys/types.h> |
24 | #include <sys/socket.h> | |
25 | #include <signal.h> | |
26 | #include <netinet/in.h> | |
27 | #include <arpa/inet.h> | |
20fb9e02 | 28 | #include <inttypes.h> |
4ba92f18 | 29 | #include <unistd.h> |
f3ed775e | 30 | |
db758600 | 31 | #include <common/error.h> |
feb0f3e5 | 32 | #include <common/utils.h> |
4ba92f18 | 33 | #include <common/defaults.h> |
f3ed775e | 34 | |
beb8c75a | 35 | #include "conf.h" |
679b4943 | 36 | #include "utils.h" |
3c9bd23c | 37 | #include "command.h" |
f3ed775e | 38 | |
b9dfb167 DG |
39 | static const char *str_kernel = "Kernel"; |
40 | static const char *str_ust = "UST"; | |
41 | static const char *str_jul = "JUL"; | |
5cdb6027 | 42 | static const char *str_log4j = "LOG4J"; |
0e115563 | 43 | static const char *str_python = "Python"; |
b9dfb167 | 44 | |
1dac0189 PPM |
45 | static |
46 | char *_get_session_name(int quiet) | |
f3ed775e DG |
47 | { |
48 | char *path, *session_name = NULL; | |
49 | ||
50 | /* Get path to config file */ | |
feb0f3e5 | 51 | path = utils_get_home_dir(); |
f3ed775e DG |
52 | if (path == NULL) { |
53 | goto error; | |
54 | } | |
55 | ||
56 | /* Get session name from config */ | |
1dac0189 PPM |
57 | session_name = quiet ? config_read_session_name_quiet(path) : |
58 | config_read_session_name(path); | |
f3ed775e | 59 | if (session_name == NULL) { |
58a97671 | 60 | goto error; |
f3ed775e DG |
61 | } |
62 | ||
3183dbb0 | 63 | DBG2("Config file path found: %s", path); |
cd80958d | 64 | DBG("Session name found: %s", session_name); |
f3ed775e | 65 | return session_name; |
3183dbb0 DG |
66 | |
67 | error: | |
68 | return NULL; | |
f3ed775e | 69 | } |
679b4943 | 70 | |
1dac0189 PPM |
71 | /* |
72 | * get_session_name | |
73 | * | |
74 | * Return allocated string with the session name found in the config | |
75 | * directory. | |
76 | */ | |
77 | char *get_session_name(void) | |
78 | { | |
79 | return _get_session_name(0); | |
80 | } | |
81 | ||
82 | /* | |
83 | * get_session_name_quiet (no warnings/errors emitted) | |
84 | * | |
85 | * Return allocated string with the session name found in the config | |
86 | * directory. | |
87 | */ | |
88 | char *get_session_name_quiet(void) | |
89 | { | |
90 | return _get_session_name(1); | |
91 | } | |
92 | ||
3c9bd23c SM |
93 | /* |
94 | * list_commands | |
95 | * | |
96 | * List commands line by line. This is mostly for bash auto completion and to | |
97 | * avoid difficult parsing. | |
98 | */ | |
99 | void list_commands(struct cmd_struct *commands, FILE *ofp) | |
100 | { | |
101 | int i = 0; | |
102 | struct cmd_struct *cmd = NULL; | |
103 | ||
104 | cmd = &commands[i]; | |
105 | while (cmd->name != NULL) { | |
106 | fprintf(ofp, "%s\n", cmd->name); | |
107 | i++; | |
108 | cmd = &commands[i]; | |
109 | } | |
110 | } | |
679b4943 SM |
111 | |
112 | /* | |
113 | * list_cmd_options | |
114 | * | |
115 | * Prints a simple list of the options available to a command. This is intended | |
116 | * to be easily parsed for bash completion. | |
117 | */ | |
118 | void list_cmd_options(FILE *ofp, struct poptOption *options) | |
119 | { | |
120 | int i; | |
121 | struct poptOption *option = NULL; | |
122 | ||
123 | for (i = 0; options[i].longName != NULL; i++) { | |
124 | option = &options[i]; | |
125 | ||
126 | fprintf(ofp, "--%s\n", option->longName); | |
127 | ||
128 | if (isprint(option->shortName)) { | |
129 | fprintf(ofp, "-%c\n", option->shortName); | |
130 | } | |
131 | } | |
132 | } | |
8ce58bad MD |
133 | |
134 | /* | |
135 | * fls: returns the position of the most significant bit. | |
136 | * Returns 0 if no bit is set, else returns the position of the most | |
137 | * significant bit (from 1 to 32 on 32-bit, from 1 to 64 on 64-bit). | |
138 | */ | |
139 | #if defined(__i386) || defined(__x86_64) | |
140 | static inline | |
141 | unsigned int fls_u32(uint32_t x) | |
142 | { | |
143 | int r; | |
144 | ||
145 | asm("bsrl %1,%0\n\t" | |
146 | "jnz 1f\n\t" | |
147 | "movl $-1,%0\n\t" | |
148 | "1:\n\t" | |
149 | : "=r" (r) : "rm" (x)); | |
150 | return r + 1; | |
151 | } | |
152 | #define HAS_FLS_U32 | |
153 | #endif | |
154 | ||
155 | #if defined(__x86_64) | |
156 | static inline | |
157 | unsigned int fls_u64(uint64_t x) | |
158 | { | |
159 | long r; | |
160 | ||
161 | asm("bsrq %1,%0\n\t" | |
162 | "jnz 1f\n\t" | |
163 | "movq $-1,%0\n\t" | |
164 | "1:\n\t" | |
165 | : "=r" (r) : "rm" (x)); | |
166 | return r + 1; | |
167 | } | |
168 | #define HAS_FLS_U64 | |
169 | #endif | |
170 | ||
171 | #ifndef HAS_FLS_U64 | |
172 | static __attribute__((unused)) | |
173 | unsigned int fls_u64(uint64_t x) | |
174 | { | |
175 | unsigned int r = 64; | |
176 | ||
177 | if (!x) | |
178 | return 0; | |
179 | ||
180 | if (!(x & 0xFFFFFFFF00000000ULL)) { | |
181 | x <<= 32; | |
182 | r -= 32; | |
183 | } | |
184 | if (!(x & 0xFFFF000000000000ULL)) { | |
185 | x <<= 16; | |
186 | r -= 16; | |
187 | } | |
188 | if (!(x & 0xFF00000000000000ULL)) { | |
189 | x <<= 8; | |
190 | r -= 8; | |
191 | } | |
192 | if (!(x & 0xF000000000000000ULL)) { | |
193 | x <<= 4; | |
194 | r -= 4; | |
195 | } | |
196 | if (!(x & 0xC000000000000000ULL)) { | |
197 | x <<= 2; | |
198 | r -= 2; | |
199 | } | |
200 | if (!(x & 0x8000000000000000ULL)) { | |
201 | x <<= 1; | |
202 | r -= 1; | |
203 | } | |
204 | return r; | |
205 | } | |
206 | #endif | |
207 | ||
208 | #ifndef HAS_FLS_U32 | |
209 | static __attribute__((unused)) | |
210 | unsigned int fls_u32(uint32_t x) | |
211 | { | |
212 | unsigned int r = 32; | |
213 | ||
214 | if (!x) | |
215 | return 0; | |
216 | if (!(x & 0xFFFF0000U)) { | |
217 | x <<= 16; | |
218 | r -= 16; | |
219 | } | |
220 | if (!(x & 0xFF000000U)) { | |
221 | x <<= 8; | |
222 | r -= 8; | |
223 | } | |
224 | if (!(x & 0xF0000000U)) { | |
225 | x <<= 4; | |
226 | r -= 4; | |
227 | } | |
228 | if (!(x & 0xC0000000U)) { | |
229 | x <<= 2; | |
230 | r -= 2; | |
231 | } | |
232 | if (!(x & 0x80000000U)) { | |
233 | x <<= 1; | |
234 | r -= 1; | |
235 | } | |
236 | return r; | |
237 | } | |
238 | #endif | |
239 | ||
240 | static | |
241 | unsigned int fls_ulong(unsigned long x) | |
242 | { | |
243 | #if (CAA_BITS_PER_LONG == 32) | |
244 | return fls_u32(x); | |
245 | #else | |
246 | return fls_u64(x); | |
247 | #endif | |
248 | } | |
249 | ||
250 | /* | |
251 | * Return the minimum order for which x <= (1UL << order). | |
252 | * Return -1 if x is 0. | |
253 | */ | |
254 | int get_count_order_u32(uint32_t x) | |
255 | { | |
256 | if (!x) | |
257 | return -1; | |
258 | ||
259 | return fls_u32(x - 1); | |
260 | } | |
261 | ||
262 | /* | |
263 | * Return the minimum order for which x <= (1UL << order). | |
264 | * Return -1 if x is 0. | |
265 | */ | |
266 | int get_count_order_u64(uint64_t x) | |
267 | { | |
268 | if (!x) | |
269 | return -1; | |
270 | ||
271 | return fls_u64(x - 1); | |
272 | } | |
273 | ||
274 | /* | |
275 | * Return the minimum order for which x <= (1UL << order). | |
276 | * Return -1 if x is 0. | |
277 | */ | |
278 | int get_count_order_ulong(unsigned long x) | |
279 | { | |
280 | if (!x) | |
281 | return -1; | |
282 | ||
283 | return fls_ulong(x - 1); | |
284 | } | |
b9dfb167 DG |
285 | |
286 | const char *get_domain_str(enum lttng_domain_type domain) | |
287 | { | |
288 | const char *str_dom; | |
289 | ||
290 | switch (domain) { | |
291 | case LTTNG_DOMAIN_KERNEL: | |
292 | str_dom = str_kernel; | |
293 | break; | |
294 | case LTTNG_DOMAIN_UST: | |
295 | str_dom = str_ust; | |
296 | break; | |
297 | case LTTNG_DOMAIN_JUL: | |
298 | str_dom = str_jul; | |
299 | break; | |
5cdb6027 DG |
300 | case LTTNG_DOMAIN_LOG4J: |
301 | str_dom = str_log4j; | |
302 | break; | |
0e115563 DG |
303 | case LTTNG_DOMAIN_PYTHON: |
304 | str_dom = str_python; | |
305 | break; | |
b9dfb167 DG |
306 | default: |
307 | /* Should not have an unknown domain or else define it. */ | |
308 | assert(0); | |
309 | } | |
310 | ||
311 | return str_dom; | |
312 | } | |
8960e9cd DG |
313 | |
314 | /* | |
315 | * Spawn a lttng relayd daemon by forking and execv. | |
316 | */ | |
317 | int spawn_relayd(const char *pathname, int port) | |
318 | { | |
319 | int ret = 0; | |
320 | pid_t pid; | |
321 | char url[255]; | |
322 | ||
323 | if (!port) { | |
324 | port = DEFAULT_NETWORK_VIEWER_PORT; | |
325 | } | |
326 | ||
327 | ret = snprintf(url, sizeof(url), "tcp://localhost:%d", port); | |
328 | if (ret < 0) { | |
329 | goto end; | |
330 | } | |
331 | ||
332 | MSG("Spawning a relayd daemon"); | |
333 | pid = fork(); | |
334 | if (pid == 0) { | |
335 | /* | |
336 | * Spawn session daemon and tell | |
337 | * it to signal us when ready. | |
338 | */ | |
339 | execlp(pathname, "lttng-relayd", "-L", url, NULL); | |
340 | /* execlp only returns if error happened */ | |
341 | if (errno == ENOENT) { | |
342 | ERR("No relayd found. Use --relayd-path."); | |
343 | } else { | |
6f04ed72 | 344 | PERROR("execlp"); |
8960e9cd DG |
345 | } |
346 | kill(getppid(), SIGTERM); /* wake parent */ | |
347 | exit(EXIT_FAILURE); | |
348 | } else if (pid > 0) { | |
349 | goto end; | |
350 | } else { | |
6f04ed72 | 351 | PERROR("fork"); |
8960e9cd DG |
352 | ret = -1; |
353 | goto end; | |
354 | } | |
355 | ||
356 | end: | |
357 | return ret; | |
358 | } | |
359 | ||
360 | /* | |
361 | * Check if relayd is alive. | |
362 | * | |
363 | * Return 1 if found else 0 if NOT found. Negative value on error. | |
364 | */ | |
365 | int check_relayd(void) | |
366 | { | |
367 | int ret, fd; | |
368 | struct sockaddr_in sin; | |
369 | ||
370 | fd = socket(AF_INET, SOCK_STREAM, 0); | |
371 | if (fd < 0) { | |
6f04ed72 | 372 | PERROR("socket check relayd"); |
dd02a4c1 DG |
373 | ret = -1; |
374 | goto error_socket; | |
8960e9cd DG |
375 | } |
376 | ||
377 | sin.sin_family = AF_INET; | |
378 | sin.sin_port = htons(DEFAULT_NETWORK_VIEWER_PORT); | |
379 | ret = inet_pton(sin.sin_family, "127.0.0.1", &sin.sin_addr); | |
380 | if (ret < 1) { | |
6f04ed72 | 381 | PERROR("inet_pton check relayd"); |
dd02a4c1 | 382 | ret = -1; |
8960e9cd DG |
383 | goto error; |
384 | } | |
385 | ||
386 | /* | |
387 | * A successful connect means the relayd exists thus returning 0 else a | |
388 | * negative value means it does NOT exists. | |
389 | */ | |
56efeab3 | 390 | ret = connect(fd, (struct sockaddr *) &sin, sizeof(sin)); |
8960e9cd DG |
391 | if (ret < 0) { |
392 | /* Not found. */ | |
393 | ret = 0; | |
394 | } else { | |
395 | /* Already spawned. */ | |
396 | ret = 1; | |
397 | } | |
398 | ||
8960e9cd | 399 | error: |
dd02a4c1 | 400 | if (close(fd) < 0) { |
6f04ed72 | 401 | PERROR("close relayd fd"); |
dd02a4c1 DG |
402 | } |
403 | error_socket: | |
404 | return ret; | |
8960e9cd | 405 | } |
3ecec76a PP |
406 | |
407 | int print_missing_or_multiple_domains(unsigned int sum) | |
408 | { | |
409 | int ret = 0; | |
410 | ||
411 | if (sum == 0) { | |
412 | ERR("Please specify a domain (-k/-u/-j)."); | |
413 | ret = -1; | |
414 | } else if (sum > 1) { | |
415 | ERR("Multiple domains specified."); | |
416 | ret = -1; | |
417 | } | |
418 | ||
419 | return ret; | |
420 | } | |
20fb9e02 JD |
421 | |
422 | /* | |
423 | * Get the discarded events and lost packet counts. | |
424 | */ | |
425 | void print_session_stats(const char *session_name) | |
426 | { | |
3e8f2238 | 427 | int count, nb_domains, domain_idx, channel_idx, session_idx; |
20fb9e02 JD |
428 | struct lttng_domain *domains; |
429 | struct lttng_channel *channels; | |
3e8f2238 JG |
430 | uint64_t discarded_events_total = 0, lost_packets_total = 0; |
431 | struct lttng_session *sessions = NULL; | |
432 | const struct lttng_session *selected_session = NULL; | |
433 | ||
434 | count = lttng_list_sessions(&sessions); | |
435 | if (count < 1) { | |
436 | ERR("Failed to retrieve session descriptions while printing session statistics."); | |
437 | goto end; | |
438 | } | |
439 | ||
440 | /* Identify the currently-selected sessions. */ | |
441 | for (session_idx = 0; session_idx < count; session_idx++) { | |
442 | if (!strcmp(session_name, sessions[session_idx].name)) { | |
443 | selected_session = &sessions[session_idx]; | |
444 | break; | |
445 | } | |
446 | } | |
447 | if (!selected_session) { | |
448 | ERR("Failed to retrieve session \"%s\" description while printing session statistics.", session_name); | |
449 | goto end; | |
450 | } | |
20fb9e02 JD |
451 | |
452 | nb_domains = lttng_list_domains(session_name, &domains); | |
453 | if (nb_domains < 0) { | |
454 | goto end; | |
455 | } | |
456 | for (domain_idx = 0; domain_idx < nb_domains; domain_idx++) { | |
457 | struct lttng_handle *handle = lttng_create_handle(session_name, | |
458 | &domains[domain_idx]); | |
459 | ||
460 | if (!handle) { | |
3e8f2238 | 461 | ERR("Failed to create session handle while printing session statistics."); |
20fb9e02 JD |
462 | goto end; |
463 | } | |
464 | ||
465 | count = lttng_list_channels(handle, &channels); | |
466 | for (channel_idx = 0; channel_idx < count; channel_idx++) { | |
467 | int ret; | |
3e8f2238 | 468 | uint64_t discarded_events = 0, lost_packets = 0; |
20fb9e02 JD |
469 | struct lttng_channel *channel = &channels[channel_idx]; |
470 | ||
471 | ret = lttng_channel_get_discarded_event_count(channel, | |
3e8f2238 | 472 | &discarded_events); |
20fb9e02 JD |
473 | if (ret) { |
474 | ERR("Failed to retrieve discarded event count from channel %s", | |
475 | channel->name); | |
476 | } | |
477 | ||
478 | ret = lttng_channel_get_lost_packet_count(channel, | |
3e8f2238 | 479 | &lost_packets); |
20fb9e02 JD |
480 | if (ret) { |
481 | ERR("Failed to retrieve lost packet count from channel %s", | |
482 | channel->name); | |
483 | } | |
484 | ||
3e8f2238 JG |
485 | discarded_events_total += discarded_events; |
486 | lost_packets_total += lost_packets; | |
20fb9e02 JD |
487 | } |
488 | lttng_destroy_handle(handle); | |
489 | } | |
3e8f2238 | 490 | if (discarded_events_total > 0 && !selected_session->snapshot_mode) { |
20fb9e02 JD |
491 | MSG("[warning] %" PRIu64 " events discarded, please refer to " |
492 | "the documentation on channel configuration.", | |
3e8f2238 | 493 | discarded_events_total); |
20fb9e02 | 494 | } |
3e8f2238 | 495 | if (lost_packets_total > 0 && !selected_session->snapshot_mode) { |
20fb9e02 JD |
496 | MSG("[warning] %" PRIu64 " packets lost, please refer to " |
497 | "the documentation on channel configuration.", | |
3e8f2238 | 498 | lost_packets_total); |
20fb9e02 JD |
499 | } |
500 | ||
501 | end: | |
3e8f2238 | 502 | free(sessions); |
20fb9e02 | 503 | } |
4ba92f18 | 504 | |
4fc83d94 | 505 | int show_cmd_help(const char *cmd_name, const char *help_msg) |
4ba92f18 PP |
506 | { |
507 | int ret; | |
508 | char page_name[32]; | |
509 | ||
510 | ret = sprintf(page_name, "lttng-%s", cmd_name); | |
511 | assert(ret > 0 && ret < 32); | |
4fc83d94 PP |
512 | ret = utils_show_help(1, page_name, help_msg); |
513 | if (ret && !help_msg) { | |
514 | ERR("Cannot view man page `lttng-%s(1)`", cmd_name); | |
515 | perror("exec"); | |
516 | } | |
4ba92f18 | 517 | |
4fc83d94 | 518 | return ret; |
4ba92f18 | 519 | } |