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 |
6c1c0768 | 19 | #define _LGPL_SOURCE |
b9dfb167 | 20 | #include <assert.h> |
f3ed775e | 21 | #include <stdlib.h> |
679b4943 | 22 | #include <ctype.h> |
3badf2bf | 23 | #include <limits.h> |
8960e9cd DG |
24 | #include <sys/types.h> |
25 | #include <sys/socket.h> | |
26 | #include <signal.h> | |
27 | #include <netinet/in.h> | |
28 | #include <arpa/inet.h> | |
f3ed775e | 29 | |
db758600 | 30 | #include <common/error.h> |
feb0f3e5 | 31 | #include <common/utils.h> |
f3ed775e | 32 | |
beb8c75a | 33 | #include "conf.h" |
679b4943 | 34 | #include "utils.h" |
3c9bd23c | 35 | #include "command.h" |
f3ed775e | 36 | |
b9dfb167 DG |
37 | static const char *str_kernel = "Kernel"; |
38 | static const char *str_ust = "UST"; | |
39 | static const char *str_jul = "JUL"; | |
5cdb6027 | 40 | static const char *str_log4j = "LOG4J"; |
0e115563 | 41 | static const char *str_python = "Python"; |
b9dfb167 | 42 | |
f3ed775e DG |
43 | /* |
44 | * get_session_name | |
45 | * | |
46 | * Return allocated string with the session name found in the config | |
47 | * directory. | |
48 | */ | |
49 | char *get_session_name(void) | |
50 | { | |
51 | char *path, *session_name = NULL; | |
52 | ||
53 | /* Get path to config file */ | |
feb0f3e5 | 54 | path = utils_get_home_dir(); |
f3ed775e DG |
55 | if (path == NULL) { |
56 | goto error; | |
57 | } | |
58 | ||
59 | /* Get session name from config */ | |
60 | session_name = config_read_session_name(path); | |
61 | if (session_name == NULL) { | |
58a97671 | 62 | goto error; |
f3ed775e DG |
63 | } |
64 | ||
3183dbb0 | 65 | DBG2("Config file path found: %s", path); |
cd80958d | 66 | DBG("Session name found: %s", session_name); |
f3ed775e | 67 | return session_name; |
3183dbb0 DG |
68 | |
69 | error: | |
70 | return NULL; | |
f3ed775e | 71 | } |
679b4943 | 72 | |
3c9bd23c SM |
73 | /* |
74 | * list_commands | |
75 | * | |
76 | * List commands line by line. This is mostly for bash auto completion and to | |
77 | * avoid difficult parsing. | |
78 | */ | |
79 | void list_commands(struct cmd_struct *commands, FILE *ofp) | |
80 | { | |
81 | int i = 0; | |
82 | struct cmd_struct *cmd = NULL; | |
83 | ||
84 | cmd = &commands[i]; | |
85 | while (cmd->name != NULL) { | |
86 | fprintf(ofp, "%s\n", cmd->name); | |
87 | i++; | |
88 | cmd = &commands[i]; | |
89 | } | |
90 | } | |
679b4943 SM |
91 | |
92 | /* | |
93 | * list_cmd_options | |
94 | * | |
95 | * Prints a simple list of the options available to a command. This is intended | |
96 | * to be easily parsed for bash completion. | |
97 | */ | |
98 | void list_cmd_options(FILE *ofp, struct poptOption *options) | |
99 | { | |
100 | int i; | |
101 | struct poptOption *option = NULL; | |
102 | ||
103 | for (i = 0; options[i].longName != NULL; i++) { | |
104 | option = &options[i]; | |
105 | ||
106 | fprintf(ofp, "--%s\n", option->longName); | |
107 | ||
108 | if (isprint(option->shortName)) { | |
109 | fprintf(ofp, "-%c\n", option->shortName); | |
110 | } | |
111 | } | |
112 | } | |
8ce58bad MD |
113 | |
114 | /* | |
115 | * fls: returns the position of the most significant bit. | |
116 | * Returns 0 if no bit is set, else returns the position of the most | |
117 | * significant bit (from 1 to 32 on 32-bit, from 1 to 64 on 64-bit). | |
118 | */ | |
119 | #if defined(__i386) || defined(__x86_64) | |
120 | static inline | |
121 | unsigned int fls_u32(uint32_t x) | |
122 | { | |
123 | int r; | |
124 | ||
125 | asm("bsrl %1,%0\n\t" | |
126 | "jnz 1f\n\t" | |
127 | "movl $-1,%0\n\t" | |
128 | "1:\n\t" | |
129 | : "=r" (r) : "rm" (x)); | |
130 | return r + 1; | |
131 | } | |
132 | #define HAS_FLS_U32 | |
133 | #endif | |
134 | ||
135 | #if defined(__x86_64) | |
136 | static inline | |
137 | unsigned int fls_u64(uint64_t x) | |
138 | { | |
139 | long r; | |
140 | ||
141 | asm("bsrq %1,%0\n\t" | |
142 | "jnz 1f\n\t" | |
143 | "movq $-1,%0\n\t" | |
144 | "1:\n\t" | |
145 | : "=r" (r) : "rm" (x)); | |
146 | return r + 1; | |
147 | } | |
148 | #define HAS_FLS_U64 | |
149 | #endif | |
150 | ||
151 | #ifndef HAS_FLS_U64 | |
152 | static __attribute__((unused)) | |
153 | unsigned int fls_u64(uint64_t x) | |
154 | { | |
155 | unsigned int r = 64; | |
156 | ||
157 | if (!x) | |
158 | return 0; | |
159 | ||
160 | if (!(x & 0xFFFFFFFF00000000ULL)) { | |
161 | x <<= 32; | |
162 | r -= 32; | |
163 | } | |
164 | if (!(x & 0xFFFF000000000000ULL)) { | |
165 | x <<= 16; | |
166 | r -= 16; | |
167 | } | |
168 | if (!(x & 0xFF00000000000000ULL)) { | |
169 | x <<= 8; | |
170 | r -= 8; | |
171 | } | |
172 | if (!(x & 0xF000000000000000ULL)) { | |
173 | x <<= 4; | |
174 | r -= 4; | |
175 | } | |
176 | if (!(x & 0xC000000000000000ULL)) { | |
177 | x <<= 2; | |
178 | r -= 2; | |
179 | } | |
180 | if (!(x & 0x8000000000000000ULL)) { | |
181 | x <<= 1; | |
182 | r -= 1; | |
183 | } | |
184 | return r; | |
185 | } | |
186 | #endif | |
187 | ||
188 | #ifndef HAS_FLS_U32 | |
189 | static __attribute__((unused)) | |
190 | unsigned int fls_u32(uint32_t x) | |
191 | { | |
192 | unsigned int r = 32; | |
193 | ||
194 | if (!x) | |
195 | return 0; | |
196 | if (!(x & 0xFFFF0000U)) { | |
197 | x <<= 16; | |
198 | r -= 16; | |
199 | } | |
200 | if (!(x & 0xFF000000U)) { | |
201 | x <<= 8; | |
202 | r -= 8; | |
203 | } | |
204 | if (!(x & 0xF0000000U)) { | |
205 | x <<= 4; | |
206 | r -= 4; | |
207 | } | |
208 | if (!(x & 0xC0000000U)) { | |
209 | x <<= 2; | |
210 | r -= 2; | |
211 | } | |
212 | if (!(x & 0x80000000U)) { | |
213 | x <<= 1; | |
214 | r -= 1; | |
215 | } | |
216 | return r; | |
217 | } | |
218 | #endif | |
219 | ||
220 | static | |
221 | unsigned int fls_ulong(unsigned long x) | |
222 | { | |
223 | #if (CAA_BITS_PER_LONG == 32) | |
224 | return fls_u32(x); | |
225 | #else | |
226 | return fls_u64(x); | |
227 | #endif | |
228 | } | |
229 | ||
230 | /* | |
231 | * Return the minimum order for which x <= (1UL << order). | |
232 | * Return -1 if x is 0. | |
233 | */ | |
234 | int get_count_order_u32(uint32_t x) | |
235 | { | |
236 | if (!x) | |
237 | return -1; | |
238 | ||
239 | return fls_u32(x - 1); | |
240 | } | |
241 | ||
242 | /* | |
243 | * Return the minimum order for which x <= (1UL << order). | |
244 | * Return -1 if x is 0. | |
245 | */ | |
246 | int get_count_order_u64(uint64_t x) | |
247 | { | |
248 | if (!x) | |
249 | return -1; | |
250 | ||
251 | return fls_u64(x - 1); | |
252 | } | |
253 | ||
254 | /* | |
255 | * Return the minimum order for which x <= (1UL << order). | |
256 | * Return -1 if x is 0. | |
257 | */ | |
258 | int get_count_order_ulong(unsigned long x) | |
259 | { | |
260 | if (!x) | |
261 | return -1; | |
262 | ||
263 | return fls_ulong(x - 1); | |
264 | } | |
b9dfb167 DG |
265 | |
266 | const char *get_domain_str(enum lttng_domain_type domain) | |
267 | { | |
268 | const char *str_dom; | |
269 | ||
270 | switch (domain) { | |
271 | case LTTNG_DOMAIN_KERNEL: | |
272 | str_dom = str_kernel; | |
273 | break; | |
274 | case LTTNG_DOMAIN_UST: | |
275 | str_dom = str_ust; | |
276 | break; | |
277 | case LTTNG_DOMAIN_JUL: | |
278 | str_dom = str_jul; | |
279 | break; | |
5cdb6027 DG |
280 | case LTTNG_DOMAIN_LOG4J: |
281 | str_dom = str_log4j; | |
282 | break; | |
0e115563 DG |
283 | case LTTNG_DOMAIN_PYTHON: |
284 | str_dom = str_python; | |
285 | break; | |
b9dfb167 DG |
286 | default: |
287 | /* Should not have an unknown domain or else define it. */ | |
288 | assert(0); | |
289 | } | |
290 | ||
291 | return str_dom; | |
292 | } | |
8960e9cd DG |
293 | |
294 | /* | |
295 | * Spawn a lttng relayd daemon by forking and execv. | |
296 | */ | |
297 | int spawn_relayd(const char *pathname, int port) | |
298 | { | |
299 | int ret = 0; | |
300 | pid_t pid; | |
301 | char url[255]; | |
302 | ||
303 | if (!port) { | |
304 | port = DEFAULT_NETWORK_VIEWER_PORT; | |
305 | } | |
306 | ||
307 | ret = snprintf(url, sizeof(url), "tcp://localhost:%d", port); | |
308 | if (ret < 0) { | |
309 | goto end; | |
310 | } | |
311 | ||
312 | MSG("Spawning a relayd daemon"); | |
313 | pid = fork(); | |
314 | if (pid == 0) { | |
315 | /* | |
316 | * Spawn session daemon and tell | |
317 | * it to signal us when ready. | |
318 | */ | |
319 | execlp(pathname, "lttng-relayd", "-L", url, NULL); | |
320 | /* execlp only returns if error happened */ | |
321 | if (errno == ENOENT) { | |
322 | ERR("No relayd found. Use --relayd-path."); | |
323 | } else { | |
6f04ed72 | 324 | PERROR("execlp"); |
8960e9cd DG |
325 | } |
326 | kill(getppid(), SIGTERM); /* wake parent */ | |
327 | exit(EXIT_FAILURE); | |
328 | } else if (pid > 0) { | |
329 | goto end; | |
330 | } else { | |
6f04ed72 | 331 | PERROR("fork"); |
8960e9cd DG |
332 | ret = -1; |
333 | goto end; | |
334 | } | |
335 | ||
336 | end: | |
337 | return ret; | |
338 | } | |
339 | ||
340 | /* | |
341 | * Check if relayd is alive. | |
342 | * | |
343 | * Return 1 if found else 0 if NOT found. Negative value on error. | |
344 | */ | |
345 | int check_relayd(void) | |
346 | { | |
347 | int ret, fd; | |
348 | struct sockaddr_in sin; | |
349 | ||
350 | fd = socket(AF_INET, SOCK_STREAM, 0); | |
351 | if (fd < 0) { | |
6f04ed72 | 352 | PERROR("socket check relayd"); |
dd02a4c1 DG |
353 | ret = -1; |
354 | goto error_socket; | |
8960e9cd DG |
355 | } |
356 | ||
357 | sin.sin_family = AF_INET; | |
358 | sin.sin_port = htons(DEFAULT_NETWORK_VIEWER_PORT); | |
359 | ret = inet_pton(sin.sin_family, "127.0.0.1", &sin.sin_addr); | |
360 | if (ret < 1) { | |
6f04ed72 | 361 | PERROR("inet_pton check relayd"); |
dd02a4c1 | 362 | ret = -1; |
8960e9cd DG |
363 | goto error; |
364 | } | |
365 | ||
366 | /* | |
367 | * A successful connect means the relayd exists thus returning 0 else a | |
368 | * negative value means it does NOT exists. | |
369 | */ | |
370 | ret = connect(fd, &sin, sizeof(sin)); | |
371 | if (ret < 0) { | |
372 | /* Not found. */ | |
373 | ret = 0; | |
374 | } else { | |
375 | /* Already spawned. */ | |
376 | ret = 1; | |
377 | } | |
378 | ||
8960e9cd | 379 | error: |
dd02a4c1 | 380 | if (close(fd) < 0) { |
6f04ed72 | 381 | PERROR("close relayd fd"); |
dd02a4c1 DG |
382 | } |
383 | error_socket: | |
384 | return ret; | |
8960e9cd | 385 | } |