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Commit | Line | Data |
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8b886ca7 | 1 | /* |
896014f4 DL |
2 | * Monitor status of frr daemons and restart if necessary. |
3 | * | |
4 | * Copyright (C) 2004 Andrew J. Schorr | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
8b886ca7 | 19 | */ |
20 | ||
a365534f | 21 | #include <zebra.h> |
8b886ca7 | 22 | #include <thread.h> |
23 | #include <log.h> | |
52e66296 | 24 | #include <network.h> |
8b886ca7 | 25 | #include <sigevent.h> |
a365534f | 26 | #include <lib/version.h> |
95c4aff2 | 27 | #include "command.h" |
87f44e2f | 28 | #include "memory_vty.h" |
4f04a76b | 29 | #include "libfrr.h" |
b647dc2a | 30 | #include "lib_errors.h" |
95c4aff2 | 31 | |
6f594023 | 32 | #include <getopt.h> |
a365534f | 33 | #include <sys/un.h> |
34 | #include <sys/wait.h> | |
837d16cc | 35 | #include <memory.h> |
651415bd | 36 | #include <systemd.h> |
8b886ca7 | 37 | |
9473e340 | 38 | #include "watchfrr.h" |
b647dc2a | 39 | #include "watchfrr_errors.h" |
95c4aff2 | 40 | |
8b886ca7 | 41 | #ifndef MIN |
42 | #define MIN(X,Y) (((X) <= (Y)) ? (X) : (Y)) | |
43 | #endif | |
44 | ||
45 | /* Macros to help randomize timers. */ | |
46 | #define JITTER(X) ((random() % ((X)+1))-((X)/2)) | |
47 | #define FUZZY(X) ((X)+JITTER((X)/20)) | |
48 | ||
49 | #define DEFAULT_PERIOD 5 | |
0a64aff6 | 50 | #define DEFAULT_TIMEOUT 90 |
8b886ca7 | 51 | #define DEFAULT_RESTART_TIMEOUT 20 |
52 | #define DEFAULT_LOGLEVEL LOG_INFO | |
53 | #define DEFAULT_MIN_RESTART 60 | |
54 | #define DEFAULT_MAX_RESTART 600 | |
8b886ca7 | 55 | |
56 | #define PING_TOKEN "PING" | |
57 | ||
55c72803 | 58 | /* Needs to be global, referenced somewhere inside libfrr. */ |
8b886ca7 | 59 | struct thread_master *master; |
64a249ad | 60 | static char pidfile_default[256]; |
8b886ca7 | 61 | |
f168b713 | 62 | static bool watch_only = false; |
8b886ca7 | 63 | |
a6810074 DL |
64 | typedef enum { |
65 | PHASE_NONE = 0, | |
66 | PHASE_STOPS_PENDING, | |
67 | PHASE_WAITING_DOWN, | |
68 | PHASE_ZEBRA_RESTART_PENDING, | |
69 | PHASE_WAITING_ZEBRA_UP | |
8b886ca7 | 70 | } restart_phase_t; |
71 | ||
a6810074 DL |
72 | static const char *phase_str[] = { |
73 | "None", | |
74 | "Stop jobs running", | |
75 | "Waiting for other daemons to come down", | |
76 | "Zebra restart job running", | |
77 | "Waiting for zebra to come up", | |
78 | "Start jobs running", | |
8b886ca7 | 79 | }; |
80 | ||
81 | #define PHASE_TIMEOUT (3*gs.restart_timeout) | |
82 | ||
a6810074 DL |
83 | struct restart_info { |
84 | const char *name; | |
85 | const char *what; | |
86 | pid_t pid; | |
87 | struct timeval time; | |
88 | long interval; | |
89 | struct thread *t_kill; | |
90 | int kills; | |
098e240f | 91 | }; |
92 | ||
a6810074 | 93 | static struct global_state { |
a6810074 DL |
94 | restart_phase_t phase; |
95 | struct thread *t_phase_hanging; | |
96 | const char *vtydir; | |
97 | long period; | |
98 | long timeout; | |
99 | long restart_timeout; | |
100 | long min_restart_interval; | |
101 | long max_restart_interval; | |
a6810074 DL |
102 | struct daemon *daemons; |
103 | const char *restart_command; | |
104 | const char *start_command; | |
105 | const char *stop_command; | |
106 | struct restart_info restart; | |
a6810074 | 107 | int loglevel; |
d62a17ae | 108 | struct daemon *special; /* points to zebra when doing phased restart */ |
a6810074 DL |
109 | int numdaemons; |
110 | int numpids; | |
d62a17ae | 111 | int numdown; /* # of daemons that are not UP or UNRESPONSIVE */ |
8b886ca7 | 112 | } gs = { |
d62a17ae | 113 | .phase = PHASE_NONE, |
64a249ad | 114 | .vtydir = frr_vtydir, |
d62a17ae | 115 | .period = 1000 * DEFAULT_PERIOD, |
116 | .timeout = DEFAULT_TIMEOUT, | |
117 | .restart_timeout = DEFAULT_RESTART_TIMEOUT, | |
118 | .loglevel = DEFAULT_LOGLEVEL, | |
119 | .min_restart_interval = DEFAULT_MIN_RESTART, | |
120 | .max_restart_interval = DEFAULT_MAX_RESTART, | |
d62a17ae | 121 | }; |
a6810074 DL |
122 | |
123 | typedef enum { | |
124 | DAEMON_INIT, | |
125 | DAEMON_DOWN, | |
126 | DAEMON_CONNECTING, | |
127 | DAEMON_UP, | |
128 | DAEMON_UNRESPONSIVE | |
8b886ca7 | 129 | } daemon_state_t; |
130 | ||
d62a17ae | 131 | #define IS_UP(DMN) \ |
132 | (((DMN)->state == DAEMON_UP) || ((DMN)->state == DAEMON_UNRESPONSIVE)) | |
8b886ca7 | 133 | |
a6810074 | 134 | static const char *state_str[] = { |
d62a17ae | 135 | "Init", "Down", "Connecting", "Up", "Unresponsive", |
8b886ca7 | 136 | }; |
137 | ||
138 | struct daemon { | |
a6810074 DL |
139 | const char *name; |
140 | daemon_state_t state; | |
141 | int fd; | |
142 | struct timeval echo_sent; | |
d7c0a89a | 143 | unsigned int connect_tries; |
a6810074 DL |
144 | struct thread *t_wakeup; |
145 | struct thread *t_read; | |
146 | struct thread *t_write; | |
147 | struct daemon *next; | |
148 | struct restart_info restart; | |
8b886ca7 | 149 | }; |
150 | ||
9272302b DL |
151 | #define OPTION_MINRESTART 2000 |
152 | #define OPTION_MAXRESTART 2001 | |
f168b713 | 153 | #define OPTION_DRY 2002 |
9272302b | 154 | |
a6810074 DL |
155 | static const struct option longopts[] = { |
156 | {"daemon", no_argument, NULL, 'd'}, | |
157 | {"statedir", required_argument, NULL, 'S'}, | |
a6810074 DL |
158 | {"loglevel", required_argument, NULL, 'l'}, |
159 | {"interval", required_argument, NULL, 'i'}, | |
160 | {"timeout", required_argument, NULL, 't'}, | |
161 | {"restart-timeout", required_argument, NULL, 'T'}, | |
162 | {"restart", required_argument, NULL, 'r'}, | |
163 | {"start-command", required_argument, NULL, 's'}, | |
164 | {"kill-command", required_argument, NULL, 'k'}, | |
f168b713 | 165 | {"dry", no_argument, NULL, OPTION_DRY}, |
d62a17ae | 166 | {"min-restart-interval", required_argument, NULL, OPTION_MINRESTART}, |
167 | {"max-restart-interval", required_argument, NULL, OPTION_MAXRESTART}, | |
a6810074 DL |
168 | {"pid-file", required_argument, NULL, 'p'}, |
169 | {"blank-string", required_argument, NULL, 'b'}, | |
170 | {"help", no_argument, NULL, 'h'}, | |
171 | {"version", no_argument, NULL, 'v'}, | |
d62a17ae | 172 | {NULL, 0, NULL, 0}}; |
8b886ca7 | 173 | |
174 | static int try_connect(struct daemon *dmn); | |
175 | static int wakeup_send_echo(struct thread *t_wakeup); | |
176 | static void try_restart(struct daemon *dmn); | |
177 | static void phase_check(void); | |
178 | ||
4f04a76b DL |
179 | static const char *progname; |
180 | static void printhelp(FILE *target) | |
8b886ca7 | 181 | { |
d62a17ae | 182 | fprintf(target, |
183 | "Usage : %s [OPTION...] <daemon name> ...\n\n\ | |
9473e340 | 184 | Watchdog program to monitor status of frr daemons and try to restart\n\ |
8b886ca7 | 185 | them if they are down or unresponsive. It determines whether a daemon is\n\ |
186 | up based on whether it can connect to the daemon's vty unix stream socket.\n\ | |
187 | It then repeatedly sends echo commands over that socket to determine whether\n\ | |
188 | the daemon is responsive. If the daemon crashes, we will receive an EOF\n\ | |
189 | on the socket connection and know immediately that the daemon is down.\n\n\ | |
190 | The daemons to be monitored should be listed on the command line.\n\n\ | |
8b886ca7 | 191 | In order to avoid attempting to restart the daemons in a fast loop,\n\ |
192 | the -m and -M options allow you to control the minimum delay between\n\ | |
193 | restart commands. The minimum restart delay is recalculated each time\n\ | |
194 | a restart is attempted: if the time since the last restart attempt exceeds\n\ | |
195 | twice the -M value, then the restart delay is set to the -m value.\n\ | |
d62a17ae | 196 | Otherwise, the interval is doubled (but capped at the -M value).\n\n", |
f168b713 | 197 | progname); |
e757c940 | 198 | |
d62a17ae | 199 | fprintf(target, |
200 | "Options:\n\ | |
8b886ca7 | 201 | -d, --daemon Run in daemon mode. In this mode, error messages are sent\n\ |
202 | to syslog instead of stdout.\n\ | |
203 | -S, --statedir Set the vty socket directory (default is %s)\n\ | |
8b886ca7 | 204 | -l, --loglevel Set the logging level (default is %d).\n\ |
205 | The value should range from %d (LOG_EMERG) to %d (LOG_DEBUG),\n\ | |
206 | but it can be set higher than %d if extra-verbose debugging\n\ | |
207 | messages are desired.\n\ | |
9272302b | 208 | --min-restart-interval\n\ |
8b886ca7 | 209 | Set the minimum seconds to wait between invocations of daemon\n\ |
210 | restart commands (default is %d).\n\ | |
9272302b | 211 | --max-restart-interval\n\ |
8b886ca7 | 212 | Set the maximum seconds to wait between invocations of daemon\n\ |
213 | restart commands (default is %d).\n\ | |
214 | -i, --interval Set the status polling interval in seconds (default is %d)\n\ | |
215 | -t, --timeout Set the unresponsiveness timeout in seconds (default is %d)\n\ | |
216 | -T, --restart-timeout\n\ | |
217 | Set the restart (kill) timeout in seconds (default is %d).\n\ | |
218 | If any background jobs are still running after this much\n\ | |
219 | time has elapsed, they will be killed.\n\ | |
220 | -r, --restart Supply a Bourne shell command to use to restart a single\n\ | |
221 | daemon. The command string should include '%%s' where the\n\ | |
222 | name of the daemon should be substituted.\n\ | |
8b886ca7 | 223 | -s, --start-command\n\ |
224 | Supply a Bourne shell to command to use to start a single\n\ | |
225 | daemon. The command string should include '%%s' where the\n\ | |
226 | name of the daemon should be substituted.\n\ | |
227 | -k, --kill-command\n\ | |
228 | Supply a Bourne shell to command to use to stop a single\n\ | |
229 | daemon. The command string should include '%%s' where the\n\ | |
230 | name of the daemon should be substituted.\n\ | |
f168b713 | 231 | --dry Do not start or restart anything, just log.\n\ |
8b886ca7 | 232 | -p, --pid-file Set process identifier file name\n\ |
233 | (default is %s).\n\ | |
c8b40f86 | 234 | -b, --blank-string\n\ |
235 | When the supplied argument string is found in any of the\n\ | |
f168b713 | 236 | various shell command arguments (-r, -s, or -k), replace\n\ |
c8b40f86 | 237 | it with a space. This is an ugly hack to circumvent problems\n\ |
238 | passing command-line arguments with embedded spaces.\n\ | |
8b886ca7 | 239 | -v, --version Print program version\n\ |
d62a17ae | 240 | -h, --help Display this help and exit\n", |
64a249ad | 241 | frr_vtydir, DEFAULT_LOGLEVEL, LOG_EMERG, LOG_DEBUG, LOG_DEBUG, |
d62a17ae | 242 | DEFAULT_MIN_RESTART, DEFAULT_MAX_RESTART, DEFAULT_PERIOD, |
64a249ad | 243 | DEFAULT_TIMEOUT, DEFAULT_RESTART_TIMEOUT, pidfile_default); |
8b886ca7 | 244 | } |
245 | ||
a6810074 | 246 | static pid_t run_background(char *shell_cmd) |
8b886ca7 | 247 | { |
a6810074 DL |
248 | pid_t child; |
249 | ||
250 | switch (child = fork()) { | |
251 | case -1: | |
09c866e3 QY |
252 | flog_err_sys(LIB_ERR_SYSTEM_CALL, |
253 | "fork failed, cannot run command [%s]: %s", | |
254 | shell_cmd, safe_strerror(errno)); | |
a6810074 DL |
255 | return -1; |
256 | case 0: | |
257 | /* Child process. */ | |
d62a17ae | 258 | /* Use separate process group so child processes can be killed |
259 | * easily. */ | |
a6810074 DL |
260 | if (setpgid(0, 0) < 0) |
261 | zlog_warn("warning: setpgid(0,0) failed: %s", | |
262 | safe_strerror(errno)); | |
263 | { | |
264 | char shell[] = "sh"; | |
265 | char dashc[] = "-c"; | |
d62a17ae | 266 | char *const argv[4] = {shell, dashc, shell_cmd, NULL}; |
a6810074 | 267 | execv("/bin/sh", argv); |
09c866e3 QY |
268 | flog_err_sys(LIB_ERR_SYSTEM_CALL, |
269 | "execv(/bin/sh -c '%s') failed: %s", | |
270 | shell_cmd, safe_strerror(errno)); | |
a6810074 DL |
271 | _exit(127); |
272 | } | |
273 | default: | |
274 | /* Parent process: we will reap the child later. */ | |
09c866e3 QY |
275 | flog_err_sys(LIB_ERR_SYSTEM_CALL, |
276 | "Forked background command [pid %d]: %s", | |
277 | (int)child, shell_cmd); | |
a6810074 DL |
278 | return child; |
279 | } | |
8b886ca7 | 280 | } |
281 | ||
a6810074 DL |
282 | static struct timeval *time_elapsed(struct timeval *result, |
283 | const struct timeval *start_time) | |
8b886ca7 | 284 | { |
a6810074 DL |
285 | gettimeofday(result, NULL); |
286 | result->tv_sec -= start_time->tv_sec; | |
287 | result->tv_usec -= start_time->tv_usec; | |
288 | while (result->tv_usec < 0) { | |
289 | result->tv_usec += 1000000L; | |
290 | result->tv_sec--; | |
291 | } | |
292 | return result; | |
8b886ca7 | 293 | } |
294 | ||
a6810074 | 295 | static int restart_kill(struct thread *t_kill) |
8b886ca7 | 296 | { |
a6810074 DL |
297 | struct restart_info *restart = THREAD_ARG(t_kill); |
298 | struct timeval delay; | |
299 | ||
300 | time_elapsed(&delay, &restart->time); | |
d62a17ae | 301 | zlog_warn( |
302 | "Warning: %s %s child process %d still running after " | |
303 | "%ld seconds, sending signal %d", | |
304 | restart->what, restart->name, (int)restart->pid, | |
305 | (long)delay.tv_sec, (restart->kills ? SIGKILL : SIGTERM)); | |
a6810074 DL |
306 | kill(-restart->pid, (restart->kills ? SIGKILL : SIGTERM)); |
307 | restart->kills++; | |
66e78ae6 QY |
308 | restart->t_kill = NULL; |
309 | thread_add_timer(master, restart_kill, restart, gs.restart_timeout, | |
310 | &restart->t_kill); | |
a6810074 | 311 | return 0; |
8b886ca7 | 312 | } |
313 | ||
a6810074 | 314 | static struct restart_info *find_child(pid_t child) |
8b886ca7 | 315 | { |
f168b713 | 316 | struct daemon *dmn; |
7c265f7d CF |
317 | if (gs.restart.pid == child) |
318 | return &gs.restart; | |
319 | ||
f168b713 DL |
320 | for (dmn = gs.daemons; dmn; dmn = dmn->next) { |
321 | if (dmn->restart.pid == child) | |
322 | return &dmn->restart; | |
a6810074 DL |
323 | } |
324 | return NULL; | |
8b886ca7 | 325 | } |
326 | ||
a6810074 | 327 | static void sigchild(void) |
8b886ca7 | 328 | { |
a6810074 DL |
329 | pid_t child; |
330 | int status; | |
331 | const char *name; | |
332 | const char *what; | |
333 | struct restart_info *restart; | |
334 | ||
335 | switch (child = waitpid(-1, &status, WNOHANG)) { | |
336 | case -1: | |
09c866e3 QY |
337 | flog_err_sys(LIB_ERR_SYSTEM_CALL, "waitpid failed: %s", |
338 | safe_strerror(errno)); | |
a6810074 DL |
339 | return; |
340 | case 0: | |
341 | zlog_warn("SIGCHLD received, but waitpid did not reap a child"); | |
342 | return; | |
343 | } | |
344 | ||
345 | if (child == integrated_write_pid) { | |
346 | integrated_write_sigchld(status); | |
347 | return; | |
348 | } | |
349 | ||
350 | if ((restart = find_child(child)) != NULL) { | |
351 | name = restart->name; | |
352 | what = restart->what; | |
353 | restart->pid = 0; | |
354 | gs.numpids--; | |
355 | thread_cancel(restart->t_kill); | |
356 | restart->t_kill = NULL; | |
d62a17ae | 357 | /* Update restart time to reflect the time the command |
358 | * completed. */ | |
a6810074 DL |
359 | gettimeofday(&restart->time, NULL); |
360 | } else { | |
09c866e3 QY |
361 | flog_err_sys( |
362 | LIB_ERR_SYSTEM_CALL, | |
363 | "waitpid returned status for an unknown child process %d", | |
364 | (int)child); | |
a6810074 DL |
365 | name = "(unknown)"; |
366 | what = "background"; | |
367 | } | |
368 | if (WIFSTOPPED(status)) | |
d62a17ae | 369 | zlog_warn("warning: %s %s process %d is stopped", what, name, |
370 | (int)child); | |
a6810074 | 371 | else if (WIFSIGNALED(status)) |
d62a17ae | 372 | zlog_warn("%s %s process %d terminated due to signal %d", what, |
373 | name, (int)child, WTERMSIG(status)); | |
a6810074 DL |
374 | else if (WIFEXITED(status)) { |
375 | if (WEXITSTATUS(status) != 0) | |
d62a17ae | 376 | zlog_warn( |
377 | "%s %s process %d exited with non-zero status %d", | |
378 | what, name, (int)child, WEXITSTATUS(status)); | |
a6810074 DL |
379 | else |
380 | zlog_debug("%s %s process %d exited normally", what, | |
381 | name, (int)child); | |
382 | } else | |
09c866e3 QY |
383 | flog_err_sys( |
384 | LIB_ERR_SYSTEM_CALL, | |
385 | "cannot interpret %s %s process %d wait status 0x%x", | |
386 | what, name, (int)child, status); | |
a6810074 | 387 | phase_check(); |
8b886ca7 | 388 | } |
389 | ||
d62a17ae | 390 | static int run_job(struct restart_info *restart, const char *cmdtype, |
391 | const char *command, int force, int update_interval) | |
8b886ca7 | 392 | { |
a6810074 DL |
393 | struct timeval delay; |
394 | ||
395 | if (gs.loglevel > LOG_DEBUG + 1) | |
396 | zlog_debug("attempting to %s %s", cmdtype, restart->name); | |
397 | ||
398 | if (restart->pid) { | |
399 | if (gs.loglevel > LOG_DEBUG + 1) | |
d62a17ae | 400 | zlog_debug( |
401 | "cannot %s %s, previous pid %d still running", | |
402 | cmdtype, restart->name, (int)restart->pid); | |
a6810074 DL |
403 | return -1; |
404 | } | |
405 | ||
d62a17ae | 406 | /* Note: time_elapsed test must come before the force test, since we |
407 | need | |
a6810074 DL |
408 | to make sure that delay is initialized for use below in updating the |
409 | restart interval. */ | |
410 | if ((time_elapsed(&delay, &restart->time)->tv_sec < restart->interval) | |
411 | && !force) { | |
412 | if (gs.loglevel > LOG_DEBUG + 1) | |
d62a17ae | 413 | zlog_debug( |
414 | "postponing %s %s: " | |
415 | "elapsed time %ld < retry interval %ld", | |
416 | cmdtype, restart->name, (long)delay.tv_sec, | |
417 | restart->interval); | |
a6810074 DL |
418 | return -1; |
419 | } | |
420 | ||
421 | gettimeofday(&restart->time, NULL); | |
422 | restart->kills = 0; | |
423 | { | |
424 | char cmd[strlen(command) + strlen(restart->name) + 1]; | |
425 | snprintf(cmd, sizeof(cmd), command, restart->name); | |
426 | if ((restart->pid = run_background(cmd)) > 0) { | |
66e78ae6 | 427 | restart->t_kill = NULL; |
d62a17ae | 428 | thread_add_timer(master, restart_kill, restart, |
429 | gs.restart_timeout, &restart->t_kill); | |
a6810074 DL |
430 | restart->what = cmdtype; |
431 | gs.numpids++; | |
432 | } else | |
433 | restart->pid = 0; | |
434 | } | |
435 | ||
436 | /* Calculate the new restart interval. */ | |
437 | if (update_interval) { | |
438 | if (delay.tv_sec > 2 * gs.max_restart_interval) | |
439 | restart->interval = gs.min_restart_interval; | |
440 | else if ((restart->interval *= 2) > gs.max_restart_interval) | |
441 | restart->interval = gs.max_restart_interval; | |
442 | if (gs.loglevel > LOG_DEBUG + 1) | |
443 | zlog_debug("restart %s interval is now %ld", | |
444 | restart->name, restart->interval); | |
445 | } | |
446 | return restart->pid; | |
8b886ca7 | 447 | } |
448 | ||
d62a17ae | 449 | #define SET_READ_HANDLER(DMN) \ |
450 | do { \ | |
451 | (DMN)->t_read = NULL; \ | |
452 | thread_add_read(master, handle_read, (DMN), (DMN)->fd, \ | |
453 | &(DMN)->t_read); \ | |
454 | } while (0); | |
455 | ||
456 | #define SET_WAKEUP_DOWN(DMN) \ | |
457 | do { \ | |
458 | (DMN)->t_wakeup = NULL; \ | |
459 | thread_add_timer_msec(master, wakeup_down, (DMN), \ | |
460 | FUZZY(gs.period), &(DMN)->t_wakeup); \ | |
461 | } while (0); | |
462 | ||
463 | #define SET_WAKEUP_UNRESPONSIVE(DMN) \ | |
464 | do { \ | |
465 | (DMN)->t_wakeup = NULL; \ | |
466 | thread_add_timer_msec(master, wakeup_unresponsive, (DMN), \ | |
467 | FUZZY(gs.period), &(DMN)->t_wakeup); \ | |
468 | } while (0); | |
469 | ||
470 | #define SET_WAKEUP_ECHO(DMN) \ | |
471 | do { \ | |
472 | (DMN)->t_wakeup = NULL; \ | |
473 | thread_add_timer_msec(master, wakeup_send_echo, (DMN), \ | |
474 | FUZZY(gs.period), &(DMN)->t_wakeup); \ | |
475 | } while (0); | |
8b886ca7 | 476 | |
a6810074 | 477 | static int wakeup_down(struct thread *t_wakeup) |
8b886ca7 | 478 | { |
a6810074 DL |
479 | struct daemon *dmn = THREAD_ARG(t_wakeup); |
480 | ||
481 | dmn->t_wakeup = NULL; | |
482 | if (try_connect(dmn) < 0) | |
483 | SET_WAKEUP_DOWN(dmn); | |
484 | if ((dmn->connect_tries > 1) && (dmn->state != DAEMON_UP)) | |
485 | try_restart(dmn); | |
486 | return 0; | |
8b886ca7 | 487 | } |
488 | ||
a6810074 | 489 | static int wakeup_init(struct thread *t_wakeup) |
8b886ca7 | 490 | { |
a6810074 DL |
491 | struct daemon *dmn = THREAD_ARG(t_wakeup); |
492 | ||
493 | dmn->t_wakeup = NULL; | |
494 | if (try_connect(dmn) < 0) { | |
495 | SET_WAKEUP_DOWN(dmn); | |
af4c2728 | 496 | flog_err(WATCHFRR_ERR_CONNECTION, |
b647dc2a DS |
497 | "%s state -> down : initial connection attempt failed", |
498 | dmn->name); | |
a6810074 DL |
499 | dmn->state = DAEMON_DOWN; |
500 | } | |
501 | return 0; | |
8b886ca7 | 502 | } |
503 | ||
a6810074 | 504 | static void daemon_down(struct daemon *dmn, const char *why) |
8b886ca7 | 505 | { |
a6810074 | 506 | if (IS_UP(dmn) || (dmn->state == DAEMON_INIT)) |
af4c2728 | 507 | flog_err(WATCHFRR_ERR_CONNECTION, |
b647dc2a | 508 | "%s state -> down : %s", dmn->name, why); |
a6810074 DL |
509 | else if (gs.loglevel > LOG_DEBUG) |
510 | zlog_debug("%s still down : %s", dmn->name, why); | |
511 | if (IS_UP(dmn)) | |
512 | gs.numdown++; | |
513 | dmn->state = DAEMON_DOWN; | |
514 | if (dmn->fd >= 0) { | |
515 | close(dmn->fd); | |
516 | dmn->fd = -1; | |
517 | } | |
518 | THREAD_OFF(dmn->t_read); | |
519 | THREAD_OFF(dmn->t_write); | |
520 | THREAD_OFF(dmn->t_wakeup); | |
521 | if (try_connect(dmn) < 0) | |
522 | SET_WAKEUP_DOWN(dmn); | |
523 | phase_check(); | |
8b886ca7 | 524 | } |
525 | ||
a6810074 | 526 | static int handle_read(struct thread *t_read) |
8b886ca7 | 527 | { |
a6810074 DL |
528 | struct daemon *dmn = THREAD_ARG(t_read); |
529 | static const char resp[sizeof(PING_TOKEN) + 4] = PING_TOKEN "\n"; | |
530 | char buf[sizeof(resp) + 100]; | |
531 | ssize_t rc; | |
532 | struct timeval delay; | |
533 | ||
534 | dmn->t_read = NULL; | |
535 | if ((rc = read(dmn->fd, buf, sizeof(buf))) < 0) { | |
536 | char why[100]; | |
537 | ||
538 | if (ERRNO_IO_RETRY(errno)) { | |
539 | /* Pretend it never happened. */ | |
540 | SET_READ_HANDLER(dmn); | |
541 | return 0; | |
542 | } | |
543 | snprintf(why, sizeof(why), "unexpected read error: %s", | |
544 | safe_strerror(errno)); | |
545 | daemon_down(dmn, why); | |
546 | return 0; | |
8b886ca7 | 547 | } |
a6810074 DL |
548 | if (rc == 0) { |
549 | daemon_down(dmn, "read returned EOF"); | |
550 | return 0; | |
551 | } | |
552 | if (!dmn->echo_sent.tv_sec) { | |
553 | char why[sizeof(buf) + 100]; | |
554 | snprintf(why, sizeof(why), | |
555 | "unexpected read returns %d bytes: %.*s", (int)rc, | |
556 | (int)rc, buf); | |
557 | daemon_down(dmn, why); | |
558 | return 0; | |
8b886ca7 | 559 | } |
a6810074 DL |
560 | |
561 | /* We are expecting an echo response: is there any chance that the | |
562 | response would not be returned entirely in the first read? That | |
563 | seems inconceivable... */ | |
564 | if ((rc != sizeof(resp)) || memcmp(buf, resp, sizeof(resp))) { | |
565 | char why[100 + sizeof(buf)]; | |
566 | snprintf(why, sizeof(why), | |
567 | "read returned bad echo response of %d bytes " | |
d62a17ae | 568 | "(expecting %u): %.*s", |
d7c0a89a | 569 | (int)rc, (unsigned int)sizeof(resp), (int)rc, buf); |
a6810074 DL |
570 | daemon_down(dmn, why); |
571 | return 0; | |
572 | } | |
573 | ||
574 | time_elapsed(&delay, &dmn->echo_sent); | |
575 | dmn->echo_sent.tv_sec = 0; | |
576 | if (dmn->state == DAEMON_UNRESPONSIVE) { | |
577 | if (delay.tv_sec < gs.timeout) { | |
578 | dmn->state = DAEMON_UP; | |
d62a17ae | 579 | zlog_warn( |
580 | "%s state -> up : echo response received after %ld.%06ld " | |
581 | "seconds", | |
582 | dmn->name, (long)delay.tv_sec, | |
583 | (long)delay.tv_usec); | |
a6810074 | 584 | } else |
d62a17ae | 585 | zlog_warn( |
586 | "%s: slow echo response finally received after %ld.%06ld " | |
587 | "seconds", | |
588 | dmn->name, (long)delay.tv_sec, | |
589 | (long)delay.tv_usec); | |
a6810074 DL |
590 | } else if (gs.loglevel > LOG_DEBUG + 1) |
591 | zlog_debug("%s: echo response received after %ld.%06ld seconds", | |
592 | dmn->name, (long)delay.tv_sec, (long)delay.tv_usec); | |
593 | ||
594 | SET_READ_HANDLER(dmn); | |
595 | if (dmn->t_wakeup) | |
596 | thread_cancel(dmn->t_wakeup); | |
597 | SET_WAKEUP_ECHO(dmn); | |
598 | ||
599 | return 0; | |
8b886ca7 | 600 | } |
601 | ||
207e0d7a DS |
602 | /* |
603 | * Wait till we notice that all daemons are ready before | |
604 | * we send we are ready to systemd | |
605 | */ | |
a6810074 | 606 | static void daemon_send_ready(void) |
207e0d7a | 607 | { |
a6810074 DL |
608 | static int sent = 0; |
609 | if (!sent && gs.numdown == 0) { | |
a6810074 | 610 | FILE *fp; |
207e0d7a | 611 | |
a6810074 | 612 | fp = fopen(DAEMON_VTY_DIR "/watchfrr.started", "w"); |
f5ba21fc DS |
613 | if (fp) |
614 | fclose(fp); | |
60bd2534 | 615 | #if defined HAVE_SYSTEMD |
d62a17ae | 616 | zlog_notice( |
617 | "Watchfrr: Notifying Systemd we are up and running"); | |
a6810074 | 618 | systemd_send_started(master, 0); |
60bd2534 | 619 | #endif |
a6810074 DL |
620 | sent = 1; |
621 | } | |
207e0d7a DS |
622 | } |
623 | ||
a6810074 | 624 | static void daemon_up(struct daemon *dmn, const char *why) |
8b886ca7 | 625 | { |
a6810074 DL |
626 | dmn->state = DAEMON_UP; |
627 | gs.numdown--; | |
628 | dmn->connect_tries = 0; | |
629 | zlog_notice("%s state -> up : %s", dmn->name, why); | |
630 | daemon_send_ready(); | |
a8cbb8b3 | 631 | SET_WAKEUP_ECHO(dmn); |
a6810074 | 632 | phase_check(); |
8b886ca7 | 633 | } |
634 | ||
a6810074 | 635 | static int check_connect(struct thread *t_write) |
8b886ca7 | 636 | { |
a6810074 DL |
637 | struct daemon *dmn = THREAD_ARG(t_write); |
638 | int sockerr; | |
639 | socklen_t reslen = sizeof(sockerr); | |
640 | ||
641 | dmn->t_write = NULL; | |
642 | if (getsockopt(dmn->fd, SOL_SOCKET, SO_ERROR, (char *)&sockerr, &reslen) | |
643 | < 0) { | |
644 | zlog_warn("%s: check_connect: getsockopt failed: %s", dmn->name, | |
645 | safe_strerror(errno)); | |
646 | daemon_down(dmn, | |
647 | "getsockopt failed checking connection success"); | |
648 | return 0; | |
649 | } | |
650 | if ((reslen == sizeof(sockerr)) && sockerr) { | |
651 | char why[100]; | |
d62a17ae | 652 | snprintf( |
653 | why, sizeof(why), | |
654 | "getsockopt reports that connection attempt failed: %s", | |
655 | safe_strerror(sockerr)); | |
a6810074 DL |
656 | daemon_down(dmn, why); |
657 | return 0; | |
658 | } | |
659 | ||
660 | daemon_up(dmn, "delayed connect succeeded"); | |
661 | return 0; | |
8b886ca7 | 662 | } |
663 | ||
a6810074 | 664 | static int wakeup_connect_hanging(struct thread *t_wakeup) |
8b886ca7 | 665 | { |
a6810074 DL |
666 | struct daemon *dmn = THREAD_ARG(t_wakeup); |
667 | char why[100]; | |
668 | ||
669 | dmn->t_wakeup = NULL; | |
670 | snprintf(why, sizeof(why), | |
671 | "connection attempt timed out after %ld seconds", gs.timeout); | |
672 | daemon_down(dmn, why); | |
673 | return 0; | |
8b886ca7 | 674 | } |
675 | ||
676 | /* Making connection to protocol daemon. */ | |
a6810074 | 677 | static int try_connect(struct daemon *dmn) |
8b886ca7 | 678 | { |
a6810074 DL |
679 | int sock; |
680 | struct sockaddr_un addr; | |
681 | socklen_t len; | |
682 | ||
683 | if (gs.loglevel > LOG_DEBUG + 1) | |
684 | zlog_debug("%s: attempting to connect", dmn->name); | |
685 | dmn->connect_tries++; | |
686 | ||
687 | memset(&addr, 0, sizeof(struct sockaddr_un)); | |
688 | addr.sun_family = AF_UNIX; | |
d62a17ae | 689 | snprintf(addr.sun_path, sizeof(addr.sun_path), "%s/%s.vty", gs.vtydir, |
690 | dmn->name); | |
6f0e3f6e | 691 | #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN |
a6810074 | 692 | len = addr.sun_len = SUN_LEN(&addr); |
8b886ca7 | 693 | #else |
a6810074 | 694 | len = sizeof(addr.sun_family) + strlen(addr.sun_path); |
d62a17ae | 695 | #endif /* HAVE_STRUCT_SOCKADDR_UN_SUN_LEN */ |
a6810074 DL |
696 | |
697 | /* Quick check to see if we might succeed before we go to the trouble | |
698 | of creating a socket. */ | |
699 | if (access(addr.sun_path, W_OK) < 0) { | |
700 | if (errno != ENOENT) | |
09c866e3 QY |
701 | flog_err_sys(LIB_ERR_SYSTEM_CALL, |
702 | "%s: access to socket %s denied: %s", | |
703 | dmn->name, addr.sun_path, | |
704 | safe_strerror(errno)); | |
a6810074 DL |
705 | return -1; |
706 | } | |
707 | ||
708 | if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { | |
09c866e3 QY |
709 | flog_err_sys(LIB_ERR_SOCKET, "%s(%s): cannot make socket: %s", |
710 | __func__, addr.sun_path, safe_strerror(errno)); | |
a6810074 DL |
711 | return -1; |
712 | } | |
713 | ||
714 | if (set_nonblocking(sock) < 0 || set_cloexec(sock) < 0) { | |
09c866e3 QY |
715 | flog_err_sys(LIB_ERR_SYSTEM_CALL, |
716 | "%s(%s): set_nonblocking/cloexec(%d) failed", | |
717 | __func__, addr.sun_path, sock); | |
a6810074 DL |
718 | close(sock); |
719 | return -1; | |
8b886ca7 | 720 | } |
a6810074 DL |
721 | |
722 | if (connect(sock, (struct sockaddr *)&addr, len) < 0) { | |
723 | if ((errno != EINPROGRESS) && (errno != EWOULDBLOCK)) { | |
724 | if (gs.loglevel > LOG_DEBUG) | |
725 | zlog_debug("%s(%s): connect failed: %s", | |
726 | __func__, addr.sun_path, | |
727 | safe_strerror(errno)); | |
728 | close(sock); | |
729 | return -1; | |
730 | } | |
731 | if (gs.loglevel > LOG_DEBUG) | |
732 | zlog_debug("%s: connection in progress", dmn->name); | |
733 | dmn->state = DAEMON_CONNECTING; | |
734 | dmn->fd = sock; | |
66e78ae6 QY |
735 | dmn->t_write = NULL; |
736 | thread_add_write(master, check_connect, dmn, dmn->fd, | |
d62a17ae | 737 | &dmn->t_write); |
738 | dmn->t_wakeup = NULL; | |
739 | thread_add_timer(master, wakeup_connect_hanging, dmn, | |
740 | gs.timeout, &dmn->t_wakeup); | |
a6810074 DL |
741 | SET_READ_HANDLER(dmn); |
742 | return 0; | |
743 | } | |
744 | ||
745 | dmn->fd = sock; | |
746 | SET_READ_HANDLER(dmn); | |
747 | daemon_up(dmn, "connect succeeded"); | |
748 | return 1; | |
8b886ca7 | 749 | } |
750 | ||
a6810074 | 751 | static int phase_hanging(struct thread *t_hanging) |
8b886ca7 | 752 | { |
a6810074 | 753 | gs.t_phase_hanging = NULL; |
af4c2728 | 754 | flog_err(WATCHFRR_ERR_CONNECTION, |
b647dc2a DS |
755 | "Phase [%s] hanging for %ld seconds, aborting phased restart", |
756 | phase_str[gs.phase], PHASE_TIMEOUT); | |
a6810074 DL |
757 | gs.phase = PHASE_NONE; |
758 | return 0; | |
8b886ca7 | 759 | } |
760 | ||
a6810074 | 761 | static void set_phase(restart_phase_t new_phase) |
8b886ca7 | 762 | { |
a6810074 DL |
763 | gs.phase = new_phase; |
764 | if (gs.t_phase_hanging) | |
765 | thread_cancel(gs.t_phase_hanging); | |
66e78ae6 QY |
766 | gs.t_phase_hanging = NULL; |
767 | thread_add_timer(master, phase_hanging, NULL, PHASE_TIMEOUT, | |
768 | &gs.t_phase_hanging); | |
8b886ca7 | 769 | } |
770 | ||
a6810074 | 771 | static void phase_check(void) |
8b886ca7 | 772 | { |
a6810074 DL |
773 | switch (gs.phase) { |
774 | case PHASE_NONE: | |
775 | break; | |
776 | case PHASE_STOPS_PENDING: | |
777 | if (gs.numpids) | |
778 | break; | |
d62a17ae | 779 | zlog_info( |
780 | "Phased restart: all routing daemon stop jobs have completed."); | |
a6810074 DL |
781 | set_phase(PHASE_WAITING_DOWN); |
782 | ||
d62a17ae | 783 | /*FALLTHRU*/ |
a6810074 DL |
784 | case PHASE_WAITING_DOWN: |
785 | if (gs.numdown + IS_UP(gs.special) < gs.numdaemons) | |
786 | break; | |
787 | zlog_info("Phased restart: all routing daemons now down."); | |
788 | run_job(&gs.special->restart, "restart", gs.restart_command, 1, | |
789 | 1); | |
790 | set_phase(PHASE_ZEBRA_RESTART_PENDING); | |
791 | ||
d62a17ae | 792 | /*FALLTHRU*/ |
a6810074 DL |
793 | case PHASE_ZEBRA_RESTART_PENDING: |
794 | if (gs.special->restart.pid) | |
795 | break; | |
796 | zlog_info("Phased restart: %s restart job completed.", | |
797 | gs.special->name); | |
798 | set_phase(PHASE_WAITING_ZEBRA_UP); | |
799 | ||
d62a17ae | 800 | /*FALLTHRU*/ |
a6810074 DL |
801 | case PHASE_WAITING_ZEBRA_UP: |
802 | if (!IS_UP(gs.special)) | |
803 | break; | |
804 | zlog_info("Phased restart: %s is now up.", gs.special->name); | |
805 | { | |
806 | struct daemon *dmn; | |
807 | for (dmn = gs.daemons; dmn; dmn = dmn->next) { | |
808 | if (dmn != gs.special) | |
809 | run_job(&dmn->restart, "start", | |
810 | gs.start_command, 1, 0); | |
811 | } | |
812 | } | |
813 | gs.phase = PHASE_NONE; | |
814 | THREAD_OFF(gs.t_phase_hanging); | |
815 | zlog_notice("Phased global restart has completed."); | |
816 | break; | |
817 | } | |
8b886ca7 | 818 | } |
819 | ||
a6810074 | 820 | static void try_restart(struct daemon *dmn) |
8b886ca7 | 821 | { |
f168b713 | 822 | if (watch_only) |
a6810074 | 823 | return; |
a6810074 | 824 | |
f168b713 DL |
825 | if (dmn != gs.special) { |
826 | if ((gs.special->state == DAEMON_UP) | |
827 | && (gs.phase == PHASE_NONE)) | |
828 | run_job(&dmn->restart, "restart", gs.restart_command, 0, | |
829 | 1); | |
830 | else | |
831 | zlog_debug( | |
832 | "%s: postponing restart attempt because master %s daemon " | |
833 | "not up [%s], or phased restart in progress", | |
834 | dmn->name, gs.special->name, | |
835 | state_str[gs.special->state]); | |
836 | return; | |
837 | } | |
838 | ||
839 | if ((gs.phase != PHASE_NONE) || gs.numpids) { | |
840 | if (gs.loglevel > LOG_DEBUG + 1) | |
841 | zlog_debug( | |
842 | "postponing phased global restart: restart already in " | |
843 | "progress [%s], or outstanding child processes [%d]", | |
844 | phase_str[gs.phase], gs.numpids); | |
845 | return; | |
846 | } | |
847 | /* Is it too soon for a restart? */ | |
848 | { | |
849 | struct timeval delay; | |
850 | if (time_elapsed(&delay, &gs.special->restart.time)->tv_sec | |
851 | < gs.special->restart.interval) { | |
a6810074 | 852 | if (gs.loglevel > LOG_DEBUG + 1) |
d62a17ae | 853 | zlog_debug( |
f168b713 DL |
854 | "postponing phased global restart: " |
855 | "elapsed time %ld < retry interval %ld", | |
856 | (long)delay.tv_sec, | |
857 | gs.special->restart.interval); | |
858 | return; | |
a6810074 | 859 | } |
8b886ca7 | 860 | } |
f168b713 | 861 | run_job(&gs.restart, "restart", gs.restart_command, 0, 1); |
8b886ca7 | 862 | } |
863 | ||
a6810074 | 864 | static int wakeup_unresponsive(struct thread *t_wakeup) |
8b886ca7 | 865 | { |
a6810074 DL |
866 | struct daemon *dmn = THREAD_ARG(t_wakeup); |
867 | ||
868 | dmn->t_wakeup = NULL; | |
869 | if (dmn->state != DAEMON_UNRESPONSIVE) | |
af4c2728 | 870 | flog_err(WATCHFRR_ERR_CONNECTION, |
b647dc2a DS |
871 | "%s: no longer unresponsive (now %s), " |
872 | "wakeup should have been cancelled!", | |
873 | dmn->name, state_str[dmn->state]); | |
a6810074 DL |
874 | else { |
875 | SET_WAKEUP_UNRESPONSIVE(dmn); | |
876 | try_restart(dmn); | |
877 | } | |
878 | return 0; | |
8b886ca7 | 879 | } |
880 | ||
a6810074 | 881 | static int wakeup_no_answer(struct thread *t_wakeup) |
8b886ca7 | 882 | { |
a6810074 DL |
883 | struct daemon *dmn = THREAD_ARG(t_wakeup); |
884 | ||
885 | dmn->t_wakeup = NULL; | |
886 | dmn->state = DAEMON_UNRESPONSIVE; | |
af4c2728 | 887 | flog_err(WATCHFRR_ERR_CONNECTION, |
b647dc2a DS |
888 | "%s state -> unresponsive : no response yet to ping " |
889 | "sent %ld seconds ago", | |
890 | dmn->name, gs.timeout); | |
71e7975a DL |
891 | SET_WAKEUP_UNRESPONSIVE(dmn); |
892 | try_restart(dmn); | |
a6810074 | 893 | return 0; |
8b886ca7 | 894 | } |
895 | ||
a6810074 | 896 | static int wakeup_send_echo(struct thread *t_wakeup) |
8b886ca7 | 897 | { |
a6810074 DL |
898 | static const char echocmd[] = "echo " PING_TOKEN; |
899 | ssize_t rc; | |
900 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
901 | ||
902 | dmn->t_wakeup = NULL; | |
d62a17ae | 903 | if (((rc = write(dmn->fd, echocmd, sizeof(echocmd))) < 0) |
904 | || ((size_t)rc != sizeof(echocmd))) { | |
a6810074 DL |
905 | char why[100 + sizeof(echocmd)]; |
906 | snprintf(why, sizeof(why), | |
907 | "write '%s' returned %d instead of %u", echocmd, | |
d7c0a89a | 908 | (int)rc, (unsigned int)sizeof(echocmd)); |
a6810074 DL |
909 | daemon_down(dmn, why); |
910 | } else { | |
911 | gettimeofday(&dmn->echo_sent, NULL); | |
66e78ae6 QY |
912 | dmn->t_wakeup = NULL; |
913 | thread_add_timer(master, wakeup_no_answer, dmn, gs.timeout, | |
914 | &dmn->t_wakeup); | |
a6810074 DL |
915 | } |
916 | return 0; | |
8b886ca7 | 917 | } |
918 | ||
470bc619 QY |
919 | bool check_all_up(void) |
920 | { | |
921 | struct daemon *dmn; | |
922 | ||
923 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
924 | if (dmn->state != DAEMON_UP) | |
925 | return false; | |
926 | return true; | |
927 | } | |
928 | ||
a6810074 | 929 | static void sigint(void) |
8b886ca7 | 930 | { |
a6810074 DL |
931 | zlog_notice("Terminating on signal"); |
932 | systemd_send_stopping(); | |
933 | exit(0); | |
8b886ca7 | 934 | } |
935 | ||
a6810074 | 936 | static int valid_command(const char *cmd) |
8b886ca7 | 937 | { |
a6810074 | 938 | char *p; |
8b886ca7 | 939 | |
a6810074 | 940 | return ((p = strchr(cmd, '%')) != NULL) && (*(p + 1) == 's') |
d62a17ae | 941 | && !strchr(p + 1, '%'); |
8b886ca7 | 942 | } |
943 | ||
c8b40f86 | 944 | /* This is an ugly hack to circumvent problems with passing command-line |
945 | arguments that contain spaces. The fix is to use a configuration file. */ | |
a6810074 | 946 | static char *translate_blanks(const char *cmd, const char *blankstr) |
c8b40f86 | 947 | { |
a6810074 DL |
948 | char *res; |
949 | char *p; | |
950 | size_t bslen = strlen(blankstr); | |
951 | ||
952 | if (!(res = strdup(cmd))) { | |
953 | perror("strdup"); | |
954 | exit(1); | |
955 | } | |
956 | while ((p = strstr(res, blankstr)) != NULL) { | |
957 | *p = ' '; | |
958 | if (bslen != 1) | |
959 | memmove(p + 1, p + bslen, strlen(p + bslen) + 1); | |
960 | } | |
961 | return res; | |
c8b40f86 | 962 | } |
963 | ||
a6810074 | 964 | struct zebra_privs_t watchfrr_privs = { |
95c4aff2 | 965 | #ifdef VTY_GROUP |
a6810074 | 966 | .vty_group = VTY_GROUP, |
95c4aff2 DL |
967 | #endif |
968 | }; | |
969 | ||
4f04a76b DL |
970 | static struct quagga_signal_t watchfrr_signals[] = { |
971 | { | |
972 | .signal = SIGINT, | |
973 | .handler = sigint, | |
974 | }, | |
975 | { | |
976 | .signal = SIGTERM, | |
977 | .handler = sigint, | |
978 | }, | |
979 | { | |
980 | .signal = SIGCHLD, | |
981 | .handler = sigchild, | |
982 | }, | |
983 | }; | |
984 | ||
985 | FRR_DAEMON_INFO(watchfrr, WATCHFRR, | |
d62a17ae | 986 | .flags = FRR_NO_PRIVSEP | FRR_NO_TCPVTY | FRR_LIMITED_CLI |
987 | | FRR_NO_CFG_PID_DRY | FRR_NO_ZCLIENT, | |
4f04a76b | 988 | |
d62a17ae | 989 | .printhelp = printhelp, |
990 | .copyright = "Copyright 2004 Andrew J. Schorr", | |
4f04a76b | 991 | |
d62a17ae | 992 | .signals = watchfrr_signals, |
993 | .n_signals = array_size(watchfrr_signals), | |
4f04a76b | 994 | |
d62a17ae | 995 | .privs = &watchfrr_privs, ) |
4f04a76b | 996 | |
999f153e DL |
997 | #define DEPRECATED_OPTIONS "aAezR:" |
998 | ||
a6810074 | 999 | int main(int argc, char **argv) |
8b886ca7 | 1000 | { |
a6810074 | 1001 | int opt; |
64a249ad | 1002 | const char *pidfile = pidfile_default; |
a6810074 DL |
1003 | const char *special = "zebra"; |
1004 | const char *blankstr = NULL; | |
a6810074 | 1005 | |
64a249ad DL |
1006 | snprintf(pidfile_default, sizeof(pidfile_default), "%s/watchfrr.pid", |
1007 | frr_vtydir); | |
1008 | ||
4f04a76b DL |
1009 | frr_preinit(&watchfrr_di, argc, argv); |
1010 | progname = watchfrr_di.progname; | |
1011 | ||
999f153e | 1012 | frr_opt_add("b:dk:l:i:p:r:S:s:t:T:" DEPRECATED_OPTIONS, longopts, ""); |
a6810074 DL |
1013 | |
1014 | gs.restart.name = "all"; | |
4f04a76b | 1015 | while ((opt = frr_getopt(argc, argv, NULL)) != EOF) { |
999f153e DL |
1016 | if (opt && opt < 128 && strchr(DEPRECATED_OPTIONS, opt)) { |
1017 | fprintf(stderr, | |
1018 | "The -%c option no longer exists.\n" | |
1019 | "Please refer to the watchfrr(8) man page.\n", | |
1020 | opt); | |
1021 | exit(1); | |
1022 | } | |
1023 | ||
a6810074 DL |
1024 | switch (opt) { |
1025 | case 0: | |
1026 | break; | |
a6810074 DL |
1027 | case 'b': |
1028 | blankstr = optarg; | |
1029 | break; | |
f168b713 DL |
1030 | case OPTION_DRY: |
1031 | watch_only = true; | |
a6810074 DL |
1032 | break; |
1033 | case 'k': | |
1034 | if (!valid_command(optarg)) { | |
1035 | fprintf(stderr, | |
1036 | "Invalid kill command, must contain '%%s': %s\n", | |
1037 | optarg); | |
4f04a76b | 1038 | frr_help_exit(1); |
a6810074 DL |
1039 | } |
1040 | gs.stop_command = optarg; | |
1041 | break; | |
d62a17ae | 1042 | case 'l': { |
1043 | char garbage[3]; | |
1044 | if ((sscanf(optarg, "%d%1s", &gs.loglevel, garbage) | |
1045 | != 1) | |
1046 | || (gs.loglevel < LOG_EMERG)) { | |
1047 | fprintf(stderr, | |
1048 | "Invalid loglevel argument: %s\n", | |
1049 | optarg); | |
1050 | frr_help_exit(1); | |
a6810074 | 1051 | } |
d62a17ae | 1052 | } break; |
1053 | case OPTION_MINRESTART: { | |
1054 | char garbage[3]; | |
1055 | if ((sscanf(optarg, "%ld%1s", &gs.min_restart_interval, | |
1056 | garbage) | |
1057 | != 1) | |
1058 | || (gs.min_restart_interval < 0)) { | |
1059 | fprintf(stderr, | |
1060 | "Invalid min_restart_interval argument: %s\n", | |
1061 | optarg); | |
1062 | frr_help_exit(1); | |
a6810074 | 1063 | } |
d62a17ae | 1064 | } break; |
1065 | case OPTION_MAXRESTART: { | |
1066 | char garbage[3]; | |
1067 | if ((sscanf(optarg, "%ld%1s", &gs.max_restart_interval, | |
1068 | garbage) | |
1069 | != 1) | |
1070 | || (gs.max_restart_interval < 0)) { | |
1071 | fprintf(stderr, | |
1072 | "Invalid max_restart_interval argument: %s\n", | |
1073 | optarg); | |
1074 | frr_help_exit(1); | |
a6810074 | 1075 | } |
d62a17ae | 1076 | } break; |
1077 | case 'i': { | |
1078 | char garbage[3]; | |
1079 | int period; | |
1080 | if ((sscanf(optarg, "%d%1s", &period, garbage) != 1) | |
1081 | || (gs.period < 1)) { | |
1082 | fprintf(stderr, | |
1083 | "Invalid interval argument: %s\n", | |
1084 | optarg); | |
1085 | frr_help_exit(1); | |
a6810074 | 1086 | } |
d62a17ae | 1087 | gs.period = 1000 * period; |
1088 | } break; | |
a6810074 DL |
1089 | case 'p': |
1090 | pidfile = optarg; | |
1091 | break; | |
1092 | case 'r': | |
a6810074 DL |
1093 | if (!valid_command(optarg)) { |
1094 | fprintf(stderr, | |
1095 | "Invalid restart command, must contain '%%s': %s\n", | |
1096 | optarg); | |
4f04a76b | 1097 | frr_help_exit(1); |
a6810074 DL |
1098 | } |
1099 | gs.restart_command = optarg; | |
a6810074 DL |
1100 | break; |
1101 | case 's': | |
1102 | if (!valid_command(optarg)) { | |
1103 | fprintf(stderr, | |
1104 | "Invalid start command, must contain '%%s': %s\n", | |
1105 | optarg); | |
4f04a76b | 1106 | frr_help_exit(1); |
a6810074 DL |
1107 | } |
1108 | gs.start_command = optarg; | |
1109 | break; | |
1110 | case 'S': | |
1111 | gs.vtydir = optarg; | |
1112 | break; | |
d62a17ae | 1113 | case 't': { |
1114 | char garbage[3]; | |
1115 | if ((sscanf(optarg, "%ld%1s", &gs.timeout, garbage) | |
1116 | != 1) | |
1117 | || (gs.timeout < 1)) { | |
1118 | fprintf(stderr, | |
1119 | "Invalid timeout argument: %s\n", | |
1120 | optarg); | |
1121 | frr_help_exit(1); | |
a6810074 | 1122 | } |
d62a17ae | 1123 | } break; |
1124 | case 'T': { | |
1125 | char garbage[3]; | |
1126 | if ((sscanf(optarg, "%ld%1s", &gs.restart_timeout, | |
1127 | garbage) | |
1128 | != 1) | |
1129 | || (gs.restart_timeout < 1)) { | |
1130 | fprintf(stderr, | |
1131 | "Invalid restart timeout argument: %s\n", | |
1132 | optarg); | |
1133 | frr_help_exit(1); | |
a6810074 | 1134 | } |
d62a17ae | 1135 | } break; |
a6810074 DL |
1136 | default: |
1137 | fputs("Invalid option.\n", stderr); | |
4f04a76b | 1138 | frr_help_exit(1); |
a6810074 | 1139 | } |
8b886ca7 | 1140 | } |
a6810074 | 1141 | |
71e7975a DL |
1142 | if (watch_only |
1143 | && (gs.start_command || gs.stop_command || gs.restart_command)) { | |
d87ae5cc | 1144 | fputs("Options -r/-s/-k are not used when --dry is active.\n", |
a6810074 | 1145 | stderr); |
8b886ca7 | 1146 | } |
f168b713 DL |
1147 | if (!watch_only |
1148 | && (!gs.restart_command || !gs.start_command || !gs.stop_command)) { | |
1149 | fprintf(stderr, | |
1150 | "Options -s (start), -k (kill), and -r (restart) are required.\n"); | |
1151 | frr_help_exit(1); | |
8b886ca7 | 1152 | } |
8b886ca7 | 1153 | |
a6810074 DL |
1154 | if (blankstr) { |
1155 | if (gs.restart_command) | |
1156 | gs.restart_command = | |
d62a17ae | 1157 | translate_blanks(gs.restart_command, blankstr); |
a6810074 DL |
1158 | if (gs.start_command) |
1159 | gs.start_command = | |
d62a17ae | 1160 | translate_blanks(gs.start_command, blankstr); |
a6810074 DL |
1161 | if (gs.stop_command) |
1162 | gs.stop_command = | |
d62a17ae | 1163 | translate_blanks(gs.stop_command, blankstr); |
065de903 | 1164 | } |
8b886ca7 | 1165 | |
a6810074 | 1166 | gs.restart.interval = gs.min_restart_interval; |
8b886ca7 | 1167 | |
4f04a76b | 1168 | master = frr_init(); |
b647dc2a | 1169 | watchfrr_error_init(); |
4f04a76b | 1170 | |
dd8376fe | 1171 | zlog_set_level(ZLOG_DEST_MONITOR, ZLOG_DISABLED); |
eb05883f | 1172 | if (watchfrr_di.daemon_mode) { |
dd8376fe | 1173 | zlog_set_level(ZLOG_DEST_SYSLOG, MIN(gs.loglevel, LOG_DEBUG)); |
d62a17ae | 1174 | if (daemon(0, 0) < 0) { |
2f4f11fa | 1175 | fprintf(stderr, "Watchfrr daemon failed: %s", |
d62a17ae | 1176 | strerror(errno)); |
1177 | exit(1); | |
4f04a76b DL |
1178 | } |
1179 | } else | |
dd8376fe | 1180 | zlog_set_level(ZLOG_DEST_STDOUT, MIN(gs.loglevel, LOG_DEBUG)); |
8b886ca7 | 1181 | |
a6810074 | 1182 | watchfrr_vty_init(); |
8b886ca7 | 1183 | |
eb05883f | 1184 | frr_vty_serv(); |
8b886ca7 | 1185 | |
8b886ca7 | 1186 | { |
a6810074 DL |
1187 | int i; |
1188 | struct daemon *tail = NULL; | |
1189 | ||
1190 | for (i = optind; i < argc; i++) { | |
1191 | struct daemon *dmn; | |
1192 | ||
1193 | if (!(dmn = (struct daemon *)calloc(1, sizeof(*dmn)))) { | |
1194 | fprintf(stderr, "calloc(1,%u) failed: %s\n", | |
d7c0a89a | 1195 | (unsigned int)sizeof(*dmn), |
a6810074 DL |
1196 | safe_strerror(errno)); |
1197 | return 1; | |
1198 | } | |
1199 | dmn->name = dmn->restart.name = argv[i]; | |
1200 | dmn->state = DAEMON_INIT; | |
1201 | gs.numdaemons++; | |
1202 | gs.numdown++; | |
1203 | dmn->fd = -1; | |
66e78ae6 | 1204 | dmn->t_wakeup = NULL; |
d62a17ae | 1205 | thread_add_timer_msec(master, wakeup_init, dmn, |
1206 | 100 + (random() % 900), | |
66e78ae6 | 1207 | &dmn->t_wakeup); |
a6810074 DL |
1208 | dmn->restart.interval = gs.min_restart_interval; |
1209 | if (tail) | |
1210 | tail->next = dmn; | |
1211 | else | |
1212 | gs.daemons = dmn; | |
1213 | tail = dmn; | |
1214 | ||
f168b713 | 1215 | if (!strcmp(dmn->name, special)) |
a6810074 DL |
1216 | gs.special = dmn; |
1217 | } | |
1218 | } | |
1219 | if (!gs.daemons) { | |
1220 | fputs("Must specify one or more daemons to monitor.\n", stderr); | |
4f04a76b | 1221 | frr_help_exit(1); |
a6810074 | 1222 | } |
f168b713 DL |
1223 | if (!watch_only && !gs.special) { |
1224 | fprintf(stderr, "\"%s\" daemon must be in daemon list\n", | |
1225 | special); | |
4f04a76b | 1226 | frr_help_exit(1); |
8b886ca7 | 1227 | } |
8b886ca7 | 1228 | |
a6810074 DL |
1229 | /* Make sure we're not already running. */ |
1230 | pid_output(pidfile); | |
1231 | ||
1232 | /* Announce which daemons are being monitored. */ | |
1233 | { | |
1234 | struct daemon *dmn; | |
1235 | size_t len = 0; | |
1236 | ||
1237 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
1238 | len += strlen(dmn->name) + 1; | |
1239 | ||
1240 | { | |
1241 | char buf[len + 1]; | |
1242 | char *p = buf; | |
1243 | ||
1244 | for (dmn = gs.daemons; dmn; dmn = dmn->next) { | |
1245 | if (p != buf) | |
1246 | *p++ = ' '; | |
1247 | strcpy(p, dmn->name); | |
1248 | p += strlen(p); | |
1249 | } | |
f168b713 DL |
1250 | zlog_notice("%s %s watching [%s]%s", progname, |
1251 | FRR_VERSION, buf, | |
1252 | watch_only ? ", monitor mode" : ""); | |
a6810074 DL |
1253 | } |
1254 | } | |
8b886ca7 | 1255 | |
a6810074 DL |
1256 | { |
1257 | struct thread thread; | |
1258 | ||
1259 | while (thread_fetch(master, &thread)) | |
1260 | thread_call(&thread); | |
1261 | } | |
8b886ca7 | 1262 | |
a6810074 DL |
1263 | systemd_send_stopping(); |
1264 | /* Not reached. */ | |
1265 | return 0; | |
8b886ca7 | 1266 | } |