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 | ||
4c462e79 | 18 | #define _GNU_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> | |
f3ed775e | 28 | |
db758600 | 29 | #include <common/error.h> |
feb0f3e5 | 30 | #include <common/utils.h> |
f3ed775e | 31 | |
beb8c75a | 32 | #include "conf.h" |
679b4943 | 33 | #include "utils.h" |
3c9bd23c | 34 | #include "command.h" |
f3ed775e | 35 | |
b9dfb167 DG |
36 | static const char *str_kernel = "Kernel"; |
37 | static const char *str_ust = "UST"; | |
38 | static const char *str_jul = "JUL"; | |
5cdb6027 | 39 | static const char *str_log4j = "LOG4J"; |
0e115563 | 40 | static const char *str_python = "Python"; |
b9dfb167 | 41 | |
f3ed775e DG |
42 | /* |
43 | * get_session_name | |
44 | * | |
45 | * Return allocated string with the session name found in the config | |
46 | * directory. | |
47 | */ | |
48 | char *get_session_name(void) | |
49 | { | |
50 | char *path, *session_name = NULL; | |
51 | ||
52 | /* Get path to config file */ | |
feb0f3e5 | 53 | path = utils_get_home_dir(); |
f3ed775e DG |
54 | if (path == NULL) { |
55 | goto error; | |
56 | } | |
57 | ||
58 | /* Get session name from config */ | |
59 | session_name = config_read_session_name(path); | |
60 | if (session_name == NULL) { | |
58a97671 | 61 | goto error; |
f3ed775e DG |
62 | } |
63 | ||
3183dbb0 | 64 | DBG2("Config file path found: %s", path); |
cd80958d | 65 | DBG("Session name found: %s", session_name); |
f3ed775e | 66 | return session_name; |
3183dbb0 DG |
67 | |
68 | error: | |
69 | return NULL; | |
f3ed775e | 70 | } |
679b4943 | 71 | |
3c9bd23c SM |
72 | /* |
73 | * list_commands | |
74 | * | |
75 | * List commands line by line. This is mostly for bash auto completion and to | |
76 | * avoid difficult parsing. | |
77 | */ | |
78 | void list_commands(struct cmd_struct *commands, FILE *ofp) | |
79 | { | |
80 | int i = 0; | |
81 | struct cmd_struct *cmd = NULL; | |
82 | ||
83 | cmd = &commands[i]; | |
84 | while (cmd->name != NULL) { | |
85 | fprintf(ofp, "%s\n", cmd->name); | |
86 | i++; | |
87 | cmd = &commands[i]; | |
88 | } | |
89 | } | |
679b4943 SM |
90 | |
91 | /* | |
92 | * list_cmd_options | |
93 | * | |
94 | * Prints a simple list of the options available to a command. This is intended | |
95 | * to be easily parsed for bash completion. | |
96 | */ | |
97 | void list_cmd_options(FILE *ofp, struct poptOption *options) | |
98 | { | |
99 | int i; | |
100 | struct poptOption *option = NULL; | |
101 | ||
102 | for (i = 0; options[i].longName != NULL; i++) { | |
103 | option = &options[i]; | |
104 | ||
105 | fprintf(ofp, "--%s\n", option->longName); | |
106 | ||
107 | if (isprint(option->shortName)) { | |
108 | fprintf(ofp, "-%c\n", option->shortName); | |
109 | } | |
110 | } | |
111 | } | |
8ce58bad MD |
112 | |
113 | /* | |
114 | * fls: returns the position of the most significant bit. | |
115 | * Returns 0 if no bit is set, else returns the position of the most | |
116 | * significant bit (from 1 to 32 on 32-bit, from 1 to 64 on 64-bit). | |
117 | */ | |
118 | #if defined(__i386) || defined(__x86_64) | |
119 | static inline | |
120 | unsigned int fls_u32(uint32_t x) | |
121 | { | |
122 | int r; | |
123 | ||
124 | asm("bsrl %1,%0\n\t" | |
125 | "jnz 1f\n\t" | |
126 | "movl $-1,%0\n\t" | |
127 | "1:\n\t" | |
128 | : "=r" (r) : "rm" (x)); | |
129 | return r + 1; | |
130 | } | |
131 | #define HAS_FLS_U32 | |
132 | #endif | |
133 | ||
134 | #if defined(__x86_64) | |
135 | static inline | |
136 | unsigned int fls_u64(uint64_t x) | |
137 | { | |
138 | long r; | |
139 | ||
140 | asm("bsrq %1,%0\n\t" | |
141 | "jnz 1f\n\t" | |
142 | "movq $-1,%0\n\t" | |
143 | "1:\n\t" | |
144 | : "=r" (r) : "rm" (x)); | |
145 | return r + 1; | |
146 | } | |
147 | #define HAS_FLS_U64 | |
148 | #endif | |
149 | ||
150 | #ifndef HAS_FLS_U64 | |
151 | static __attribute__((unused)) | |
152 | unsigned int fls_u64(uint64_t x) | |
153 | { | |
154 | unsigned int r = 64; | |
155 | ||
156 | if (!x) | |
157 | return 0; | |
158 | ||
159 | if (!(x & 0xFFFFFFFF00000000ULL)) { | |
160 | x <<= 32; | |
161 | r -= 32; | |
162 | } | |
163 | if (!(x & 0xFFFF000000000000ULL)) { | |
164 | x <<= 16; | |
165 | r -= 16; | |
166 | } | |
167 | if (!(x & 0xFF00000000000000ULL)) { | |
168 | x <<= 8; | |
169 | r -= 8; | |
170 | } | |
171 | if (!(x & 0xF000000000000000ULL)) { | |
172 | x <<= 4; | |
173 | r -= 4; | |
174 | } | |
175 | if (!(x & 0xC000000000000000ULL)) { | |
176 | x <<= 2; | |
177 | r -= 2; | |
178 | } | |
179 | if (!(x & 0x8000000000000000ULL)) { | |
180 | x <<= 1; | |
181 | r -= 1; | |
182 | } | |
183 | return r; | |
184 | } | |
185 | #endif | |
186 | ||
187 | #ifndef HAS_FLS_U32 | |
188 | static __attribute__((unused)) | |
189 | unsigned int fls_u32(uint32_t x) | |
190 | { | |
191 | unsigned int r = 32; | |
192 | ||
193 | if (!x) | |
194 | return 0; | |
195 | if (!(x & 0xFFFF0000U)) { | |
196 | x <<= 16; | |
197 | r -= 16; | |
198 | } | |
199 | if (!(x & 0xFF000000U)) { | |
200 | x <<= 8; | |
201 | r -= 8; | |
202 | } | |
203 | if (!(x & 0xF0000000U)) { | |
204 | x <<= 4; | |
205 | r -= 4; | |
206 | } | |
207 | if (!(x & 0xC0000000U)) { | |
208 | x <<= 2; | |
209 | r -= 2; | |
210 | } | |
211 | if (!(x & 0x80000000U)) { | |
212 | x <<= 1; | |
213 | r -= 1; | |
214 | } | |
215 | return r; | |
216 | } | |
217 | #endif | |
218 | ||
219 | static | |
220 | unsigned int fls_ulong(unsigned long x) | |
221 | { | |
222 | #if (CAA_BITS_PER_LONG == 32) | |
223 | return fls_u32(x); | |
224 | #else | |
225 | return fls_u64(x); | |
226 | #endif | |
227 | } | |
228 | ||
229 | /* | |
230 | * Return the minimum order for which x <= (1UL << order). | |
231 | * Return -1 if x is 0. | |
232 | */ | |
233 | int get_count_order_u32(uint32_t x) | |
234 | { | |
235 | if (!x) | |
236 | return -1; | |
237 | ||
238 | return fls_u32(x - 1); | |
239 | } | |
240 | ||
241 | /* | |
242 | * Return the minimum order for which x <= (1UL << order). | |
243 | * Return -1 if x is 0. | |
244 | */ | |
245 | int get_count_order_u64(uint64_t x) | |
246 | { | |
247 | if (!x) | |
248 | return -1; | |
249 | ||
250 | return fls_u64(x - 1); | |
251 | } | |
252 | ||
253 | /* | |
254 | * Return the minimum order for which x <= (1UL << order). | |
255 | * Return -1 if x is 0. | |
256 | */ | |
257 | int get_count_order_ulong(unsigned long x) | |
258 | { | |
259 | if (!x) | |
260 | return -1; | |
261 | ||
262 | return fls_ulong(x - 1); | |
263 | } | |
b9dfb167 DG |
264 | |
265 | const char *get_domain_str(enum lttng_domain_type domain) | |
266 | { | |
267 | const char *str_dom; | |
268 | ||
269 | switch (domain) { | |
270 | case LTTNG_DOMAIN_KERNEL: | |
271 | str_dom = str_kernel; | |
272 | break; | |
273 | case LTTNG_DOMAIN_UST: | |
274 | str_dom = str_ust; | |
275 | break; | |
276 | case LTTNG_DOMAIN_JUL: | |
277 | str_dom = str_jul; | |
278 | break; | |
5cdb6027 DG |
279 | case LTTNG_DOMAIN_LOG4J: |
280 | str_dom = str_log4j; | |
281 | break; | |
0e115563 DG |
282 | case LTTNG_DOMAIN_PYTHON: |
283 | str_dom = str_python; | |
284 | break; | |
b9dfb167 DG |
285 | default: |
286 | /* Should not have an unknown domain or else define it. */ | |
287 | assert(0); | |
288 | } | |
289 | ||
290 | return str_dom; | |
291 | } | |
8960e9cd DG |
292 | |
293 | /* | |
294 | * Spawn a lttng relayd daemon by forking and execv. | |
295 | */ | |
296 | int spawn_relayd(const char *pathname, int port) | |
297 | { | |
298 | int ret = 0; | |
299 | pid_t pid; | |
300 | char url[255]; | |
301 | ||
302 | if (!port) { | |
303 | port = DEFAULT_NETWORK_VIEWER_PORT; | |
304 | } | |
305 | ||
306 | ret = snprintf(url, sizeof(url), "tcp://localhost:%d", port); | |
307 | if (ret < 0) { | |
308 | goto end; | |
309 | } | |
310 | ||
311 | MSG("Spawning a relayd daemon"); | |
312 | pid = fork(); | |
313 | if (pid == 0) { | |
314 | /* | |
315 | * Spawn session daemon and tell | |
316 | * it to signal us when ready. | |
317 | */ | |
318 | execlp(pathname, "lttng-relayd", "-L", url, NULL); | |
319 | /* execlp only returns if error happened */ | |
320 | if (errno == ENOENT) { | |
321 | ERR("No relayd found. Use --relayd-path."); | |
322 | } else { | |
323 | perror("execlp"); | |
324 | } | |
325 | kill(getppid(), SIGTERM); /* wake parent */ | |
326 | exit(EXIT_FAILURE); | |
327 | } else if (pid > 0) { | |
328 | goto end; | |
329 | } else { | |
330 | perror("fork"); | |
331 | ret = -1; | |
332 | goto end; | |
333 | } | |
334 | ||
335 | end: | |
336 | return ret; | |
337 | } | |
338 | ||
339 | /* | |
340 | * Check if relayd is alive. | |
341 | * | |
342 | * Return 1 if found else 0 if NOT found. Negative value on error. | |
343 | */ | |
344 | int check_relayd(void) | |
345 | { | |
346 | int ret, fd; | |
347 | struct sockaddr_in sin; | |
348 | ||
349 | fd = socket(AF_INET, SOCK_STREAM, 0); | |
350 | if (fd < 0) { | |
351 | perror("socket check relayd"); | |
dd02a4c1 DG |
352 | ret = -1; |
353 | goto error_socket; | |
8960e9cd DG |
354 | } |
355 | ||
356 | sin.sin_family = AF_INET; | |
357 | sin.sin_port = htons(DEFAULT_NETWORK_VIEWER_PORT); | |
358 | ret = inet_pton(sin.sin_family, "127.0.0.1", &sin.sin_addr); | |
359 | if (ret < 1) { | |
360 | perror("inet_pton check relayd"); | |
dd02a4c1 | 361 | ret = -1; |
8960e9cd DG |
362 | goto error; |
363 | } | |
364 | ||
365 | /* | |
366 | * A successful connect means the relayd exists thus returning 0 else a | |
367 | * negative value means it does NOT exists. | |
368 | */ | |
369 | ret = connect(fd, &sin, sizeof(sin)); | |
370 | if (ret < 0) { | |
371 | /* Not found. */ | |
372 | ret = 0; | |
373 | } else { | |
374 | /* Already spawned. */ | |
375 | ret = 1; | |
376 | } | |
377 | ||
8960e9cd | 378 | error: |
dd02a4c1 DG |
379 | if (close(fd) < 0) { |
380 | perror("close relayd fd"); | |
381 | } | |
382 | error_socket: | |
383 | return ret; | |
8960e9cd | 384 | } |