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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 | ||
0a7c7856 DL |
58 | DEFINE_MGROUP(WATCHFRR, "watchfrr") |
59 | DEFINE_MTYPE_STATIC(WATCHFRR, WATCHFRR_DAEMON, "watchfrr daemon entry") | |
60 | ||
55c72803 | 61 | /* Needs to be global, referenced somewhere inside libfrr. */ |
8b886ca7 | 62 | struct thread_master *master; |
63 | ||
f168b713 | 64 | static bool watch_only = false; |
8b886ca7 | 65 | |
a6810074 DL |
66 | typedef enum { |
67 | PHASE_NONE = 0, | |
68 | PHASE_STOPS_PENDING, | |
69 | PHASE_WAITING_DOWN, | |
70 | PHASE_ZEBRA_RESTART_PENDING, | |
71 | PHASE_WAITING_ZEBRA_UP | |
8b886ca7 | 72 | } restart_phase_t; |
73 | ||
a6810074 DL |
74 | static const char *phase_str[] = { |
75 | "None", | |
76 | "Stop jobs running", | |
77 | "Waiting for other daemons to come down", | |
78 | "Zebra restart job running", | |
79 | "Waiting for zebra to come up", | |
80 | "Start jobs running", | |
8b886ca7 | 81 | }; |
82 | ||
83 | #define PHASE_TIMEOUT (3*gs.restart_timeout) | |
84 | ||
a6810074 DL |
85 | struct restart_info { |
86 | const char *name; | |
87 | const char *what; | |
88 | pid_t pid; | |
89 | struct timeval time; | |
90 | long interval; | |
91 | struct thread *t_kill; | |
92 | int kills; | |
098e240f | 93 | }; |
94 | ||
a6810074 | 95 | static struct global_state { |
a6810074 DL |
96 | restart_phase_t phase; |
97 | struct thread *t_phase_hanging; | |
98 | const char *vtydir; | |
99 | long period; | |
100 | long timeout; | |
101 | long restart_timeout; | |
102 | long min_restart_interval; | |
103 | long max_restart_interval; | |
a6810074 DL |
104 | struct daemon *daemons; |
105 | const char *restart_command; | |
106 | const char *start_command; | |
107 | const char *stop_command; | |
108 | struct restart_info restart; | |
a6810074 | 109 | int loglevel; |
d62a17ae | 110 | struct daemon *special; /* points to zebra when doing phased restart */ |
a6810074 DL |
111 | int numdaemons; |
112 | int numpids; | |
d62a17ae | 113 | int numdown; /* # of daemons that are not UP or UNRESPONSIVE */ |
8b886ca7 | 114 | } gs = { |
d62a17ae | 115 | .phase = PHASE_NONE, |
64a249ad | 116 | .vtydir = frr_vtydir, |
d62a17ae | 117 | .period = 1000 * DEFAULT_PERIOD, |
118 | .timeout = DEFAULT_TIMEOUT, | |
119 | .restart_timeout = DEFAULT_RESTART_TIMEOUT, | |
120 | .loglevel = DEFAULT_LOGLEVEL, | |
121 | .min_restart_interval = DEFAULT_MIN_RESTART, | |
122 | .max_restart_interval = DEFAULT_MAX_RESTART, | |
d62a17ae | 123 | }; |
a6810074 DL |
124 | |
125 | typedef enum { | |
126 | DAEMON_INIT, | |
127 | DAEMON_DOWN, | |
128 | DAEMON_CONNECTING, | |
129 | DAEMON_UP, | |
130 | DAEMON_UNRESPONSIVE | |
8b886ca7 | 131 | } daemon_state_t; |
132 | ||
d62a17ae | 133 | #define IS_UP(DMN) \ |
134 | (((DMN)->state == DAEMON_UP) || ((DMN)->state == DAEMON_UNRESPONSIVE)) | |
8b886ca7 | 135 | |
a6810074 | 136 | static const char *state_str[] = { |
d62a17ae | 137 | "Init", "Down", "Connecting", "Up", "Unresponsive", |
8b886ca7 | 138 | }; |
139 | ||
140 | struct daemon { | |
a6810074 DL |
141 | const char *name; |
142 | daemon_state_t state; | |
143 | int fd; | |
144 | struct timeval echo_sent; | |
d7c0a89a | 145 | unsigned int connect_tries; |
a6810074 DL |
146 | struct thread *t_wakeup; |
147 | struct thread *t_read; | |
148 | struct thread *t_write; | |
149 | struct daemon *next; | |
150 | struct restart_info restart; | |
8b886ca7 | 151 | }; |
152 | ||
9272302b DL |
153 | #define OPTION_MINRESTART 2000 |
154 | #define OPTION_MAXRESTART 2001 | |
f168b713 | 155 | #define OPTION_DRY 2002 |
9272302b | 156 | |
a6810074 DL |
157 | static const struct option longopts[] = { |
158 | {"daemon", no_argument, NULL, 'd'}, | |
159 | {"statedir", required_argument, NULL, 'S'}, | |
a6810074 DL |
160 | {"loglevel", required_argument, NULL, 'l'}, |
161 | {"interval", required_argument, NULL, 'i'}, | |
162 | {"timeout", required_argument, NULL, 't'}, | |
163 | {"restart-timeout", required_argument, NULL, 'T'}, | |
164 | {"restart", required_argument, NULL, 'r'}, | |
165 | {"start-command", required_argument, NULL, 's'}, | |
166 | {"kill-command", required_argument, NULL, 'k'}, | |
f168b713 | 167 | {"dry", no_argument, NULL, OPTION_DRY}, |
d62a17ae | 168 | {"min-restart-interval", required_argument, NULL, OPTION_MINRESTART}, |
169 | {"max-restart-interval", required_argument, NULL, OPTION_MAXRESTART}, | |
a6810074 DL |
170 | {"pid-file", required_argument, NULL, 'p'}, |
171 | {"blank-string", required_argument, NULL, 'b'}, | |
172 | {"help", no_argument, NULL, 'h'}, | |
173 | {"version", no_argument, NULL, 'v'}, | |
d62a17ae | 174 | {NULL, 0, NULL, 0}}; |
8b886ca7 | 175 | |
176 | static int try_connect(struct daemon *dmn); | |
177 | static int wakeup_send_echo(struct thread *t_wakeup); | |
178 | static void try_restart(struct daemon *dmn); | |
179 | static void phase_check(void); | |
180 | ||
4f04a76b DL |
181 | static const char *progname; |
182 | static void printhelp(FILE *target) | |
8b886ca7 | 183 | { |
d62a17ae | 184 | fprintf(target, |
185 | "Usage : %s [OPTION...] <daemon name> ...\n\n\ | |
9473e340 | 186 | Watchdog program to monitor status of frr daemons and try to restart\n\ |
8b886ca7 | 187 | them if they are down or unresponsive. It determines whether a daemon is\n\ |
188 | up based on whether it can connect to the daemon's vty unix stream socket.\n\ | |
189 | It then repeatedly sends echo commands over that socket to determine whether\n\ | |
190 | the daemon is responsive. If the daemon crashes, we will receive an EOF\n\ | |
191 | on the socket connection and know immediately that the daemon is down.\n\n\ | |
192 | The daemons to be monitored should be listed on the command line.\n\n\ | |
8b886ca7 | 193 | In order to avoid attempting to restart the daemons in a fast loop,\n\ |
194 | the -m and -M options allow you to control the minimum delay between\n\ | |
195 | restart commands. The minimum restart delay is recalculated each time\n\ | |
196 | a restart is attempted: if the time since the last restart attempt exceeds\n\ | |
197 | twice the -M value, then the restart delay is set to the -m value.\n\ | |
d62a17ae | 198 | Otherwise, the interval is doubled (but capped at the -M value).\n\n", |
f168b713 | 199 | progname); |
e757c940 | 200 | |
d62a17ae | 201 | fprintf(target, |
202 | "Options:\n\ | |
8b886ca7 | 203 | -d, --daemon Run in daemon mode. In this mode, error messages are sent\n\ |
204 | to syslog instead of stdout.\n\ | |
205 | -S, --statedir Set the vty socket directory (default is %s)\n\ | |
8b886ca7 | 206 | -l, --loglevel Set the logging level (default is %d).\n\ |
207 | The value should range from %d (LOG_EMERG) to %d (LOG_DEBUG),\n\ | |
208 | but it can be set higher than %d if extra-verbose debugging\n\ | |
209 | messages are desired.\n\ | |
9272302b | 210 | --min-restart-interval\n\ |
8b886ca7 | 211 | Set the minimum seconds to wait between invocations of daemon\n\ |
212 | restart commands (default is %d).\n\ | |
9272302b | 213 | --max-restart-interval\n\ |
8b886ca7 | 214 | Set the maximum seconds to wait between invocations of daemon\n\ |
215 | restart commands (default is %d).\n\ | |
216 | -i, --interval Set the status polling interval in seconds (default is %d)\n\ | |
217 | -t, --timeout Set the unresponsiveness timeout in seconds (default is %d)\n\ | |
218 | -T, --restart-timeout\n\ | |
219 | Set the restart (kill) timeout in seconds (default is %d).\n\ | |
220 | If any background jobs are still running after this much\n\ | |
221 | time has elapsed, they will be killed.\n\ | |
222 | -r, --restart Supply a Bourne shell command to use to restart a single\n\ | |
223 | daemon. The command string should include '%%s' where the\n\ | |
224 | name of the daemon should be substituted.\n\ | |
8b886ca7 | 225 | -s, --start-command\n\ |
226 | Supply a Bourne shell to command to use to start a single\n\ | |
227 | daemon. The command string should include '%%s' where the\n\ | |
228 | name of the daemon should be substituted.\n\ | |
229 | -k, --kill-command\n\ | |
230 | Supply a Bourne shell to command to use to stop a single\n\ | |
231 | daemon. The command string should include '%%s' where the\n\ | |
232 | name of the daemon should be substituted.\n\ | |
f168b713 | 233 | --dry Do not start or restart anything, just log.\n\ |
8b886ca7 | 234 | -p, --pid-file Set process identifier file name\n\ |
0a7c7856 | 235 | (default is %s/watchfrr.pid).\n\ |
c8b40f86 | 236 | -b, --blank-string\n\ |
237 | When the supplied argument string is found in any of the\n\ | |
f168b713 | 238 | various shell command arguments (-r, -s, or -k), replace\n\ |
c8b40f86 | 239 | it with a space. This is an ugly hack to circumvent problems\n\ |
240 | passing command-line arguments with embedded spaces.\n\ | |
8b886ca7 | 241 | -v, --version Print program version\n\ |
d62a17ae | 242 | -h, --help Display this help and exit\n", |
64a249ad | 243 | frr_vtydir, DEFAULT_LOGLEVEL, LOG_EMERG, LOG_DEBUG, LOG_DEBUG, |
d62a17ae | 244 | DEFAULT_MIN_RESTART, DEFAULT_MAX_RESTART, DEFAULT_PERIOD, |
0a7c7856 | 245 | DEFAULT_TIMEOUT, DEFAULT_RESTART_TIMEOUT, frr_vtydir); |
8b886ca7 | 246 | } |
247 | ||
a6810074 | 248 | static pid_t run_background(char *shell_cmd) |
8b886ca7 | 249 | { |
a6810074 DL |
250 | pid_t child; |
251 | ||
252 | switch (child = fork()) { | |
253 | case -1: | |
450971aa | 254 | flog_err_sys(EC_LIB_SYSTEM_CALL, |
09c866e3 QY |
255 | "fork failed, cannot run command [%s]: %s", |
256 | shell_cmd, safe_strerror(errno)); | |
a6810074 DL |
257 | return -1; |
258 | case 0: | |
259 | /* Child process. */ | |
d62a17ae | 260 | /* Use separate process group so child processes can be killed |
261 | * easily. */ | |
a6810074 DL |
262 | if (setpgid(0, 0) < 0) |
263 | zlog_warn("warning: setpgid(0,0) failed: %s", | |
264 | safe_strerror(errno)); | |
265 | { | |
266 | char shell[] = "sh"; | |
267 | char dashc[] = "-c"; | |
d62a17ae | 268 | char *const argv[4] = {shell, dashc, shell_cmd, NULL}; |
a6810074 | 269 | execv("/bin/sh", argv); |
450971aa | 270 | flog_err_sys(EC_LIB_SYSTEM_CALL, |
09c866e3 QY |
271 | "execv(/bin/sh -c '%s') failed: %s", |
272 | shell_cmd, safe_strerror(errno)); | |
a6810074 DL |
273 | _exit(127); |
274 | } | |
275 | default: | |
276 | /* Parent process: we will reap the child later. */ | |
450971aa | 277 | flog_err_sys(EC_LIB_SYSTEM_CALL, |
09c866e3 QY |
278 | "Forked background command [pid %d]: %s", |
279 | (int)child, shell_cmd); | |
a6810074 DL |
280 | return child; |
281 | } | |
8b886ca7 | 282 | } |
283 | ||
a6810074 DL |
284 | static struct timeval *time_elapsed(struct timeval *result, |
285 | const struct timeval *start_time) | |
8b886ca7 | 286 | { |
a6810074 DL |
287 | gettimeofday(result, NULL); |
288 | result->tv_sec -= start_time->tv_sec; | |
289 | result->tv_usec -= start_time->tv_usec; | |
290 | while (result->tv_usec < 0) { | |
291 | result->tv_usec += 1000000L; | |
292 | result->tv_sec--; | |
293 | } | |
294 | return result; | |
8b886ca7 | 295 | } |
296 | ||
a6810074 | 297 | static int restart_kill(struct thread *t_kill) |
8b886ca7 | 298 | { |
a6810074 DL |
299 | struct restart_info *restart = THREAD_ARG(t_kill); |
300 | struct timeval delay; | |
301 | ||
302 | time_elapsed(&delay, &restart->time); | |
d62a17ae | 303 | zlog_warn( |
304 | "Warning: %s %s child process %d still running after " | |
305 | "%ld seconds, sending signal %d", | |
306 | restart->what, restart->name, (int)restart->pid, | |
307 | (long)delay.tv_sec, (restart->kills ? SIGKILL : SIGTERM)); | |
a6810074 DL |
308 | kill(-restart->pid, (restart->kills ? SIGKILL : SIGTERM)); |
309 | restart->kills++; | |
66e78ae6 QY |
310 | restart->t_kill = NULL; |
311 | thread_add_timer(master, restart_kill, restart, gs.restart_timeout, | |
312 | &restart->t_kill); | |
a6810074 | 313 | return 0; |
8b886ca7 | 314 | } |
315 | ||
a6810074 | 316 | static struct restart_info *find_child(pid_t child) |
8b886ca7 | 317 | { |
f168b713 | 318 | struct daemon *dmn; |
7c265f7d CF |
319 | if (gs.restart.pid == child) |
320 | return &gs.restart; | |
321 | ||
f168b713 DL |
322 | for (dmn = gs.daemons; dmn; dmn = dmn->next) { |
323 | if (dmn->restart.pid == child) | |
324 | return &dmn->restart; | |
a6810074 DL |
325 | } |
326 | return NULL; | |
8b886ca7 | 327 | } |
328 | ||
a6810074 | 329 | static void sigchild(void) |
8b886ca7 | 330 | { |
a6810074 DL |
331 | pid_t child; |
332 | int status; | |
333 | const char *name; | |
334 | const char *what; | |
335 | struct restart_info *restart; | |
336 | ||
337 | switch (child = waitpid(-1, &status, WNOHANG)) { | |
338 | case -1: | |
450971aa | 339 | flog_err_sys(EC_LIB_SYSTEM_CALL, "waitpid failed: %s", |
09c866e3 | 340 | safe_strerror(errno)); |
a6810074 DL |
341 | return; |
342 | case 0: | |
343 | zlog_warn("SIGCHLD received, but waitpid did not reap a child"); | |
344 | return; | |
345 | } | |
346 | ||
347 | if (child == integrated_write_pid) { | |
348 | integrated_write_sigchld(status); | |
349 | return; | |
350 | } | |
351 | ||
352 | if ((restart = find_child(child)) != NULL) { | |
353 | name = restart->name; | |
354 | what = restart->what; | |
355 | restart->pid = 0; | |
356 | gs.numpids--; | |
357 | thread_cancel(restart->t_kill); | |
358 | restart->t_kill = NULL; | |
d62a17ae | 359 | /* Update restart time to reflect the time the command |
360 | * completed. */ | |
a6810074 DL |
361 | gettimeofday(&restart->time, NULL); |
362 | } else { | |
09c866e3 | 363 | flog_err_sys( |
450971aa | 364 | EC_LIB_SYSTEM_CALL, |
09c866e3 QY |
365 | "waitpid returned status for an unknown child process %d", |
366 | (int)child); | |
a6810074 DL |
367 | name = "(unknown)"; |
368 | what = "background"; | |
369 | } | |
370 | if (WIFSTOPPED(status)) | |
d62a17ae | 371 | zlog_warn("warning: %s %s process %d is stopped", what, name, |
372 | (int)child); | |
a6810074 | 373 | else if (WIFSIGNALED(status)) |
d62a17ae | 374 | zlog_warn("%s %s process %d terminated due to signal %d", what, |
375 | name, (int)child, WTERMSIG(status)); | |
a6810074 DL |
376 | else if (WIFEXITED(status)) { |
377 | if (WEXITSTATUS(status) != 0) | |
d62a17ae | 378 | zlog_warn( |
379 | "%s %s process %d exited with non-zero status %d", | |
380 | what, name, (int)child, WEXITSTATUS(status)); | |
a6810074 DL |
381 | else |
382 | zlog_debug("%s %s process %d exited normally", what, | |
383 | name, (int)child); | |
384 | } else | |
09c866e3 | 385 | flog_err_sys( |
450971aa | 386 | EC_LIB_SYSTEM_CALL, |
09c866e3 QY |
387 | "cannot interpret %s %s process %d wait status 0x%x", |
388 | what, name, (int)child, status); | |
a6810074 | 389 | phase_check(); |
8b886ca7 | 390 | } |
391 | ||
d62a17ae | 392 | static int run_job(struct restart_info *restart, const char *cmdtype, |
393 | const char *command, int force, int update_interval) | |
8b886ca7 | 394 | { |
a6810074 DL |
395 | struct timeval delay; |
396 | ||
397 | if (gs.loglevel > LOG_DEBUG + 1) | |
398 | zlog_debug("attempting to %s %s", cmdtype, restart->name); | |
399 | ||
400 | if (restart->pid) { | |
401 | if (gs.loglevel > LOG_DEBUG + 1) | |
d62a17ae | 402 | zlog_debug( |
403 | "cannot %s %s, previous pid %d still running", | |
404 | cmdtype, restart->name, (int)restart->pid); | |
a6810074 DL |
405 | return -1; |
406 | } | |
407 | ||
d62a17ae | 408 | /* Note: time_elapsed test must come before the force test, since we |
409 | need | |
a6810074 DL |
410 | to make sure that delay is initialized for use below in updating the |
411 | restart interval. */ | |
412 | if ((time_elapsed(&delay, &restart->time)->tv_sec < restart->interval) | |
413 | && !force) { | |
414 | if (gs.loglevel > LOG_DEBUG + 1) | |
d62a17ae | 415 | zlog_debug( |
416 | "postponing %s %s: " | |
417 | "elapsed time %ld < retry interval %ld", | |
418 | cmdtype, restart->name, (long)delay.tv_sec, | |
419 | restart->interval); | |
a6810074 DL |
420 | return -1; |
421 | } | |
422 | ||
423 | gettimeofday(&restart->time, NULL); | |
424 | restart->kills = 0; | |
425 | { | |
426 | char cmd[strlen(command) + strlen(restart->name) + 1]; | |
427 | snprintf(cmd, sizeof(cmd), command, restart->name); | |
428 | if ((restart->pid = run_background(cmd)) > 0) { | |
66e78ae6 | 429 | restart->t_kill = NULL; |
d62a17ae | 430 | thread_add_timer(master, restart_kill, restart, |
431 | gs.restart_timeout, &restart->t_kill); | |
a6810074 DL |
432 | restart->what = cmdtype; |
433 | gs.numpids++; | |
434 | } else | |
435 | restart->pid = 0; | |
436 | } | |
437 | ||
438 | /* Calculate the new restart interval. */ | |
439 | if (update_interval) { | |
440 | if (delay.tv_sec > 2 * gs.max_restart_interval) | |
441 | restart->interval = gs.min_restart_interval; | |
442 | else if ((restart->interval *= 2) > gs.max_restart_interval) | |
443 | restart->interval = gs.max_restart_interval; | |
444 | if (gs.loglevel > LOG_DEBUG + 1) | |
445 | zlog_debug("restart %s interval is now %ld", | |
446 | restart->name, restart->interval); | |
447 | } | |
448 | return restart->pid; | |
8b886ca7 | 449 | } |
450 | ||
d62a17ae | 451 | #define SET_READ_HANDLER(DMN) \ |
452 | do { \ | |
453 | (DMN)->t_read = NULL; \ | |
454 | thread_add_read(master, handle_read, (DMN), (DMN)->fd, \ | |
455 | &(DMN)->t_read); \ | |
456 | } while (0); | |
457 | ||
458 | #define SET_WAKEUP_DOWN(DMN) \ | |
459 | do { \ | |
460 | (DMN)->t_wakeup = NULL; \ | |
461 | thread_add_timer_msec(master, wakeup_down, (DMN), \ | |
462 | FUZZY(gs.period), &(DMN)->t_wakeup); \ | |
463 | } while (0); | |
464 | ||
465 | #define SET_WAKEUP_UNRESPONSIVE(DMN) \ | |
466 | do { \ | |
467 | (DMN)->t_wakeup = NULL; \ | |
468 | thread_add_timer_msec(master, wakeup_unresponsive, (DMN), \ | |
469 | FUZZY(gs.period), &(DMN)->t_wakeup); \ | |
470 | } while (0); | |
471 | ||
472 | #define SET_WAKEUP_ECHO(DMN) \ | |
473 | do { \ | |
474 | (DMN)->t_wakeup = NULL; \ | |
475 | thread_add_timer_msec(master, wakeup_send_echo, (DMN), \ | |
476 | FUZZY(gs.period), &(DMN)->t_wakeup); \ | |
477 | } while (0); | |
8b886ca7 | 478 | |
a6810074 | 479 | static int wakeup_down(struct thread *t_wakeup) |
8b886ca7 | 480 | { |
a6810074 DL |
481 | struct daemon *dmn = THREAD_ARG(t_wakeup); |
482 | ||
483 | dmn->t_wakeup = NULL; | |
484 | if (try_connect(dmn) < 0) | |
485 | SET_WAKEUP_DOWN(dmn); | |
486 | if ((dmn->connect_tries > 1) && (dmn->state != DAEMON_UP)) | |
487 | try_restart(dmn); | |
488 | return 0; | |
8b886ca7 | 489 | } |
490 | ||
a6810074 | 491 | static int wakeup_init(struct thread *t_wakeup) |
8b886ca7 | 492 | { |
a6810074 DL |
493 | struct daemon *dmn = THREAD_ARG(t_wakeup); |
494 | ||
495 | dmn->t_wakeup = NULL; | |
496 | if (try_connect(dmn) < 0) { | |
497 | SET_WAKEUP_DOWN(dmn); | |
f74ae2bb | 498 | flog_err(EC_WATCHFRR_CONNECTION, |
1c50c1c0 QY |
499 | "%s state -> down : initial connection attempt failed", |
500 | dmn->name); | |
a6810074 DL |
501 | dmn->state = DAEMON_DOWN; |
502 | } | |
503 | return 0; | |
8b886ca7 | 504 | } |
505 | ||
a6810074 | 506 | static void daemon_down(struct daemon *dmn, const char *why) |
8b886ca7 | 507 | { |
a6810074 | 508 | if (IS_UP(dmn) || (dmn->state == DAEMON_INIT)) |
1c50c1c0 QY |
509 | flog_err(EC_WATCHFRR_CONNECTION, "%s state -> down : %s", |
510 | dmn->name, why); | |
a6810074 DL |
511 | else if (gs.loglevel > LOG_DEBUG) |
512 | zlog_debug("%s still down : %s", dmn->name, why); | |
513 | if (IS_UP(dmn)) | |
514 | gs.numdown++; | |
515 | dmn->state = DAEMON_DOWN; | |
516 | if (dmn->fd >= 0) { | |
517 | close(dmn->fd); | |
518 | dmn->fd = -1; | |
519 | } | |
520 | THREAD_OFF(dmn->t_read); | |
521 | THREAD_OFF(dmn->t_write); | |
522 | THREAD_OFF(dmn->t_wakeup); | |
523 | if (try_connect(dmn) < 0) | |
524 | SET_WAKEUP_DOWN(dmn); | |
525 | phase_check(); | |
8b886ca7 | 526 | } |
527 | ||
a6810074 | 528 | static int handle_read(struct thread *t_read) |
8b886ca7 | 529 | { |
a6810074 DL |
530 | struct daemon *dmn = THREAD_ARG(t_read); |
531 | static const char resp[sizeof(PING_TOKEN) + 4] = PING_TOKEN "\n"; | |
532 | char buf[sizeof(resp) + 100]; | |
533 | ssize_t rc; | |
534 | struct timeval delay; | |
535 | ||
536 | dmn->t_read = NULL; | |
537 | if ((rc = read(dmn->fd, buf, sizeof(buf))) < 0) { | |
538 | char why[100]; | |
539 | ||
540 | if (ERRNO_IO_RETRY(errno)) { | |
541 | /* Pretend it never happened. */ | |
542 | SET_READ_HANDLER(dmn); | |
543 | return 0; | |
544 | } | |
545 | snprintf(why, sizeof(why), "unexpected read error: %s", | |
546 | safe_strerror(errno)); | |
547 | daemon_down(dmn, why); | |
548 | return 0; | |
8b886ca7 | 549 | } |
a6810074 DL |
550 | if (rc == 0) { |
551 | daemon_down(dmn, "read returned EOF"); | |
552 | return 0; | |
553 | } | |
554 | if (!dmn->echo_sent.tv_sec) { | |
555 | char why[sizeof(buf) + 100]; | |
556 | snprintf(why, sizeof(why), | |
557 | "unexpected read returns %d bytes: %.*s", (int)rc, | |
558 | (int)rc, buf); | |
559 | daemon_down(dmn, why); | |
560 | return 0; | |
8b886ca7 | 561 | } |
a6810074 DL |
562 | |
563 | /* We are expecting an echo response: is there any chance that the | |
564 | response would not be returned entirely in the first read? That | |
565 | seems inconceivable... */ | |
566 | if ((rc != sizeof(resp)) || memcmp(buf, resp, sizeof(resp))) { | |
567 | char why[100 + sizeof(buf)]; | |
568 | snprintf(why, sizeof(why), | |
569 | "read returned bad echo response of %d bytes " | |
d62a17ae | 570 | "(expecting %u): %.*s", |
d7c0a89a | 571 | (int)rc, (unsigned int)sizeof(resp), (int)rc, buf); |
a6810074 DL |
572 | daemon_down(dmn, why); |
573 | return 0; | |
574 | } | |
575 | ||
576 | time_elapsed(&delay, &dmn->echo_sent); | |
577 | dmn->echo_sent.tv_sec = 0; | |
578 | if (dmn->state == DAEMON_UNRESPONSIVE) { | |
579 | if (delay.tv_sec < gs.timeout) { | |
580 | dmn->state = DAEMON_UP; | |
d62a17ae | 581 | zlog_warn( |
582 | "%s state -> up : echo response received after %ld.%06ld " | |
583 | "seconds", | |
584 | dmn->name, (long)delay.tv_sec, | |
585 | (long)delay.tv_usec); | |
a6810074 | 586 | } else |
d62a17ae | 587 | zlog_warn( |
588 | "%s: slow echo response finally received after %ld.%06ld " | |
589 | "seconds", | |
590 | dmn->name, (long)delay.tv_sec, | |
591 | (long)delay.tv_usec); | |
a6810074 DL |
592 | } else if (gs.loglevel > LOG_DEBUG + 1) |
593 | zlog_debug("%s: echo response received after %ld.%06ld seconds", | |
594 | dmn->name, (long)delay.tv_sec, (long)delay.tv_usec); | |
595 | ||
596 | SET_READ_HANDLER(dmn); | |
597 | if (dmn->t_wakeup) | |
598 | thread_cancel(dmn->t_wakeup); | |
599 | SET_WAKEUP_ECHO(dmn); | |
600 | ||
601 | return 0; | |
8b886ca7 | 602 | } |
603 | ||
207e0d7a DS |
604 | /* |
605 | * Wait till we notice that all daemons are ready before | |
606 | * we send we are ready to systemd | |
607 | */ | |
a6810074 | 608 | static void daemon_send_ready(void) |
207e0d7a | 609 | { |
a6810074 DL |
610 | static int sent = 0; |
611 | if (!sent && gs.numdown == 0) { | |
a6810074 | 612 | FILE *fp; |
207e0d7a | 613 | |
0a7c7856 DL |
614 | zlog_notice("all daemons up, doing startup-complete notify"); |
615 | frr_detach(); | |
616 | ||
a6810074 | 617 | fp = fopen(DAEMON_VTY_DIR "/watchfrr.started", "w"); |
f5ba21fc DS |
618 | if (fp) |
619 | fclose(fp); | |
60bd2534 | 620 | #if defined HAVE_SYSTEMD |
a6810074 | 621 | systemd_send_started(master, 0); |
60bd2534 | 622 | #endif |
a6810074 DL |
623 | sent = 1; |
624 | } | |
207e0d7a DS |
625 | } |
626 | ||
a6810074 | 627 | static void daemon_up(struct daemon *dmn, const char *why) |
8b886ca7 | 628 | { |
a6810074 DL |
629 | dmn->state = DAEMON_UP; |
630 | gs.numdown--; | |
631 | dmn->connect_tries = 0; | |
632 | zlog_notice("%s state -> up : %s", dmn->name, why); | |
633 | daemon_send_ready(); | |
a8cbb8b3 | 634 | SET_WAKEUP_ECHO(dmn); |
a6810074 | 635 | phase_check(); |
8b886ca7 | 636 | } |
637 | ||
a6810074 | 638 | static int check_connect(struct thread *t_write) |
8b886ca7 | 639 | { |
a6810074 DL |
640 | struct daemon *dmn = THREAD_ARG(t_write); |
641 | int sockerr; | |
642 | socklen_t reslen = sizeof(sockerr); | |
643 | ||
644 | dmn->t_write = NULL; | |
645 | if (getsockopt(dmn->fd, SOL_SOCKET, SO_ERROR, (char *)&sockerr, &reslen) | |
646 | < 0) { | |
647 | zlog_warn("%s: check_connect: getsockopt failed: %s", dmn->name, | |
648 | safe_strerror(errno)); | |
649 | daemon_down(dmn, | |
650 | "getsockopt failed checking connection success"); | |
651 | return 0; | |
652 | } | |
653 | if ((reslen == sizeof(sockerr)) && sockerr) { | |
654 | char why[100]; | |
d62a17ae | 655 | snprintf( |
656 | why, sizeof(why), | |
657 | "getsockopt reports that connection attempt failed: %s", | |
658 | safe_strerror(sockerr)); | |
a6810074 DL |
659 | daemon_down(dmn, why); |
660 | return 0; | |
661 | } | |
662 | ||
663 | daemon_up(dmn, "delayed connect succeeded"); | |
664 | return 0; | |
8b886ca7 | 665 | } |
666 | ||
a6810074 | 667 | static int wakeup_connect_hanging(struct thread *t_wakeup) |
8b886ca7 | 668 | { |
a6810074 DL |
669 | struct daemon *dmn = THREAD_ARG(t_wakeup); |
670 | char why[100]; | |
671 | ||
672 | dmn->t_wakeup = NULL; | |
673 | snprintf(why, sizeof(why), | |
674 | "connection attempt timed out after %ld seconds", gs.timeout); | |
675 | daemon_down(dmn, why); | |
676 | return 0; | |
8b886ca7 | 677 | } |
678 | ||
679 | /* Making connection to protocol daemon. */ | |
a6810074 | 680 | static int try_connect(struct daemon *dmn) |
8b886ca7 | 681 | { |
a6810074 DL |
682 | int sock; |
683 | struct sockaddr_un addr; | |
684 | socklen_t len; | |
685 | ||
686 | if (gs.loglevel > LOG_DEBUG + 1) | |
687 | zlog_debug("%s: attempting to connect", dmn->name); | |
688 | dmn->connect_tries++; | |
689 | ||
690 | memset(&addr, 0, sizeof(struct sockaddr_un)); | |
691 | addr.sun_family = AF_UNIX; | |
d62a17ae | 692 | snprintf(addr.sun_path, sizeof(addr.sun_path), "%s/%s.vty", gs.vtydir, |
693 | dmn->name); | |
6f0e3f6e | 694 | #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN |
a6810074 | 695 | len = addr.sun_len = SUN_LEN(&addr); |
8b886ca7 | 696 | #else |
a6810074 | 697 | len = sizeof(addr.sun_family) + strlen(addr.sun_path); |
d62a17ae | 698 | #endif /* HAVE_STRUCT_SOCKADDR_UN_SUN_LEN */ |
a6810074 DL |
699 | |
700 | /* Quick check to see if we might succeed before we go to the trouble | |
701 | of creating a socket. */ | |
702 | if (access(addr.sun_path, W_OK) < 0) { | |
703 | if (errno != ENOENT) | |
450971aa | 704 | flog_err_sys(EC_LIB_SYSTEM_CALL, |
09c866e3 QY |
705 | "%s: access to socket %s denied: %s", |
706 | dmn->name, addr.sun_path, | |
707 | safe_strerror(errno)); | |
a6810074 DL |
708 | return -1; |
709 | } | |
710 | ||
711 | if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { | |
450971aa | 712 | flog_err_sys(EC_LIB_SOCKET, "%s(%s): cannot make socket: %s", |
09c866e3 | 713 | __func__, addr.sun_path, safe_strerror(errno)); |
a6810074 DL |
714 | return -1; |
715 | } | |
716 | ||
717 | if (set_nonblocking(sock) < 0 || set_cloexec(sock) < 0) { | |
450971aa | 718 | flog_err_sys(EC_LIB_SYSTEM_CALL, |
09c866e3 QY |
719 | "%s(%s): set_nonblocking/cloexec(%d) failed", |
720 | __func__, addr.sun_path, sock); | |
a6810074 DL |
721 | close(sock); |
722 | return -1; | |
8b886ca7 | 723 | } |
a6810074 DL |
724 | |
725 | if (connect(sock, (struct sockaddr *)&addr, len) < 0) { | |
726 | if ((errno != EINPROGRESS) && (errno != EWOULDBLOCK)) { | |
727 | if (gs.loglevel > LOG_DEBUG) | |
728 | zlog_debug("%s(%s): connect failed: %s", | |
729 | __func__, addr.sun_path, | |
730 | safe_strerror(errno)); | |
731 | close(sock); | |
732 | return -1; | |
733 | } | |
734 | if (gs.loglevel > LOG_DEBUG) | |
735 | zlog_debug("%s: connection in progress", dmn->name); | |
736 | dmn->state = DAEMON_CONNECTING; | |
737 | dmn->fd = sock; | |
66e78ae6 QY |
738 | dmn->t_write = NULL; |
739 | thread_add_write(master, check_connect, dmn, dmn->fd, | |
d62a17ae | 740 | &dmn->t_write); |
741 | dmn->t_wakeup = NULL; | |
742 | thread_add_timer(master, wakeup_connect_hanging, dmn, | |
743 | gs.timeout, &dmn->t_wakeup); | |
a6810074 DL |
744 | SET_READ_HANDLER(dmn); |
745 | return 0; | |
746 | } | |
747 | ||
748 | dmn->fd = sock; | |
749 | SET_READ_HANDLER(dmn); | |
750 | daemon_up(dmn, "connect succeeded"); | |
751 | return 1; | |
8b886ca7 | 752 | } |
753 | ||
a6810074 | 754 | static int phase_hanging(struct thread *t_hanging) |
8b886ca7 | 755 | { |
a6810074 | 756 | gs.t_phase_hanging = NULL; |
f74ae2bb | 757 | flog_err(EC_WATCHFRR_CONNECTION, |
1c50c1c0 QY |
758 | "Phase [%s] hanging for %ld seconds, aborting phased restart", |
759 | phase_str[gs.phase], PHASE_TIMEOUT); | |
a6810074 DL |
760 | gs.phase = PHASE_NONE; |
761 | return 0; | |
8b886ca7 | 762 | } |
763 | ||
a6810074 | 764 | static void set_phase(restart_phase_t new_phase) |
8b886ca7 | 765 | { |
a6810074 DL |
766 | gs.phase = new_phase; |
767 | if (gs.t_phase_hanging) | |
768 | thread_cancel(gs.t_phase_hanging); | |
66e78ae6 QY |
769 | gs.t_phase_hanging = NULL; |
770 | thread_add_timer(master, phase_hanging, NULL, PHASE_TIMEOUT, | |
771 | &gs.t_phase_hanging); | |
8b886ca7 | 772 | } |
773 | ||
a6810074 | 774 | static void phase_check(void) |
8b886ca7 | 775 | { |
a6810074 DL |
776 | switch (gs.phase) { |
777 | case PHASE_NONE: | |
778 | break; | |
779 | case PHASE_STOPS_PENDING: | |
780 | if (gs.numpids) | |
781 | break; | |
d62a17ae | 782 | zlog_info( |
783 | "Phased restart: all routing daemon stop jobs have completed."); | |
a6810074 DL |
784 | set_phase(PHASE_WAITING_DOWN); |
785 | ||
d62a17ae | 786 | /*FALLTHRU*/ |
a6810074 DL |
787 | case PHASE_WAITING_DOWN: |
788 | if (gs.numdown + IS_UP(gs.special) < gs.numdaemons) | |
789 | break; | |
790 | zlog_info("Phased restart: all routing daemons now down."); | |
791 | run_job(&gs.special->restart, "restart", gs.restart_command, 1, | |
792 | 1); | |
793 | set_phase(PHASE_ZEBRA_RESTART_PENDING); | |
794 | ||
d62a17ae | 795 | /*FALLTHRU*/ |
a6810074 DL |
796 | case PHASE_ZEBRA_RESTART_PENDING: |
797 | if (gs.special->restart.pid) | |
798 | break; | |
799 | zlog_info("Phased restart: %s restart job completed.", | |
800 | gs.special->name); | |
801 | set_phase(PHASE_WAITING_ZEBRA_UP); | |
802 | ||
d62a17ae | 803 | /*FALLTHRU*/ |
a6810074 DL |
804 | case PHASE_WAITING_ZEBRA_UP: |
805 | if (!IS_UP(gs.special)) | |
806 | break; | |
807 | zlog_info("Phased restart: %s is now up.", gs.special->name); | |
808 | { | |
809 | struct daemon *dmn; | |
810 | for (dmn = gs.daemons; dmn; dmn = dmn->next) { | |
811 | if (dmn != gs.special) | |
812 | run_job(&dmn->restart, "start", | |
813 | gs.start_command, 1, 0); | |
814 | } | |
815 | } | |
816 | gs.phase = PHASE_NONE; | |
817 | THREAD_OFF(gs.t_phase_hanging); | |
818 | zlog_notice("Phased global restart has completed."); | |
819 | break; | |
820 | } | |
8b886ca7 | 821 | } |
822 | ||
a6810074 | 823 | static void try_restart(struct daemon *dmn) |
8b886ca7 | 824 | { |
f168b713 | 825 | if (watch_only) |
a6810074 | 826 | return; |
a6810074 | 827 | |
f168b713 DL |
828 | if (dmn != gs.special) { |
829 | if ((gs.special->state == DAEMON_UP) | |
830 | && (gs.phase == PHASE_NONE)) | |
831 | run_job(&dmn->restart, "restart", gs.restart_command, 0, | |
832 | 1); | |
833 | else | |
834 | zlog_debug( | |
835 | "%s: postponing restart attempt because master %s daemon " | |
836 | "not up [%s], or phased restart in progress", | |
837 | dmn->name, gs.special->name, | |
838 | state_str[gs.special->state]); | |
839 | return; | |
840 | } | |
841 | ||
842 | if ((gs.phase != PHASE_NONE) || gs.numpids) { | |
843 | if (gs.loglevel > LOG_DEBUG + 1) | |
844 | zlog_debug( | |
845 | "postponing phased global restart: restart already in " | |
846 | "progress [%s], or outstanding child processes [%d]", | |
847 | phase_str[gs.phase], gs.numpids); | |
848 | return; | |
849 | } | |
850 | /* Is it too soon for a restart? */ | |
851 | { | |
852 | struct timeval delay; | |
853 | if (time_elapsed(&delay, &gs.special->restart.time)->tv_sec | |
854 | < gs.special->restart.interval) { | |
a6810074 | 855 | if (gs.loglevel > LOG_DEBUG + 1) |
d62a17ae | 856 | zlog_debug( |
f168b713 DL |
857 | "postponing phased global restart: " |
858 | "elapsed time %ld < retry interval %ld", | |
859 | (long)delay.tv_sec, | |
860 | gs.special->restart.interval); | |
861 | return; | |
a6810074 | 862 | } |
8b886ca7 | 863 | } |
f168b713 | 864 | run_job(&gs.restart, "restart", gs.restart_command, 0, 1); |
8b886ca7 | 865 | } |
866 | ||
a6810074 | 867 | static int wakeup_unresponsive(struct thread *t_wakeup) |
8b886ca7 | 868 | { |
a6810074 DL |
869 | struct daemon *dmn = THREAD_ARG(t_wakeup); |
870 | ||
871 | dmn->t_wakeup = NULL; | |
872 | if (dmn->state != DAEMON_UNRESPONSIVE) | |
f74ae2bb | 873 | flog_err(EC_WATCHFRR_CONNECTION, |
1c50c1c0 QY |
874 | "%s: no longer unresponsive (now %s), " |
875 | "wakeup should have been cancelled!", | |
876 | dmn->name, state_str[dmn->state]); | |
a6810074 DL |
877 | else { |
878 | SET_WAKEUP_UNRESPONSIVE(dmn); | |
879 | try_restart(dmn); | |
880 | } | |
881 | return 0; | |
8b886ca7 | 882 | } |
883 | ||
a6810074 | 884 | static int wakeup_no_answer(struct thread *t_wakeup) |
8b886ca7 | 885 | { |
a6810074 DL |
886 | struct daemon *dmn = THREAD_ARG(t_wakeup); |
887 | ||
888 | dmn->t_wakeup = NULL; | |
889 | dmn->state = DAEMON_UNRESPONSIVE; | |
f74ae2bb | 890 | flog_err(EC_WATCHFRR_CONNECTION, |
1c50c1c0 QY |
891 | "%s state -> unresponsive : no response yet to ping " |
892 | "sent %ld seconds ago", | |
893 | dmn->name, gs.timeout); | |
71e7975a DL |
894 | SET_WAKEUP_UNRESPONSIVE(dmn); |
895 | try_restart(dmn); | |
a6810074 | 896 | return 0; |
8b886ca7 | 897 | } |
898 | ||
a6810074 | 899 | static int wakeup_send_echo(struct thread *t_wakeup) |
8b886ca7 | 900 | { |
a6810074 DL |
901 | static const char echocmd[] = "echo " PING_TOKEN; |
902 | ssize_t rc; | |
903 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
904 | ||
905 | dmn->t_wakeup = NULL; | |
d62a17ae | 906 | if (((rc = write(dmn->fd, echocmd, sizeof(echocmd))) < 0) |
907 | || ((size_t)rc != sizeof(echocmd))) { | |
a6810074 DL |
908 | char why[100 + sizeof(echocmd)]; |
909 | snprintf(why, sizeof(why), | |
910 | "write '%s' returned %d instead of %u", echocmd, | |
d7c0a89a | 911 | (int)rc, (unsigned int)sizeof(echocmd)); |
a6810074 DL |
912 | daemon_down(dmn, why); |
913 | } else { | |
914 | gettimeofday(&dmn->echo_sent, NULL); | |
66e78ae6 QY |
915 | dmn->t_wakeup = NULL; |
916 | thread_add_timer(master, wakeup_no_answer, dmn, gs.timeout, | |
917 | &dmn->t_wakeup); | |
a6810074 DL |
918 | } |
919 | return 0; | |
8b886ca7 | 920 | } |
921 | ||
470bc619 QY |
922 | bool check_all_up(void) |
923 | { | |
924 | struct daemon *dmn; | |
925 | ||
926 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
927 | if (dmn->state != DAEMON_UP) | |
928 | return false; | |
929 | return true; | |
930 | } | |
931 | ||
a6810074 | 932 | static void sigint(void) |
8b886ca7 | 933 | { |
a6810074 DL |
934 | zlog_notice("Terminating on signal"); |
935 | systemd_send_stopping(); | |
936 | exit(0); | |
8b886ca7 | 937 | } |
938 | ||
a6810074 | 939 | static int valid_command(const char *cmd) |
8b886ca7 | 940 | { |
a6810074 | 941 | char *p; |
8b886ca7 | 942 | |
a6810074 | 943 | return ((p = strchr(cmd, '%')) != NULL) && (*(p + 1) == 's') |
d62a17ae | 944 | && !strchr(p + 1, '%'); |
8b886ca7 | 945 | } |
946 | ||
c8b40f86 | 947 | /* This is an ugly hack to circumvent problems with passing command-line |
948 | arguments that contain spaces. The fix is to use a configuration file. */ | |
a6810074 | 949 | static char *translate_blanks(const char *cmd, const char *blankstr) |
c8b40f86 | 950 | { |
a6810074 DL |
951 | char *res; |
952 | char *p; | |
953 | size_t bslen = strlen(blankstr); | |
954 | ||
955 | if (!(res = strdup(cmd))) { | |
956 | perror("strdup"); | |
957 | exit(1); | |
958 | } | |
959 | while ((p = strstr(res, blankstr)) != NULL) { | |
960 | *p = ' '; | |
961 | if (bslen != 1) | |
962 | memmove(p + 1, p + bslen, strlen(p + bslen) + 1); | |
963 | } | |
964 | return res; | |
c8b40f86 | 965 | } |
966 | ||
0a7c7856 DL |
967 | static void watchfrr_init(int argc, char **argv) |
968 | { | |
969 | const char *special = "zebra"; | |
970 | int i; | |
971 | struct daemon *dmn, **add = &gs.daemons; | |
972 | char alldaemons[512] = "", *p = alldaemons; | |
973 | ||
974 | for (i = optind; i < argc; i++) { | |
975 | dmn = XCALLOC(MTYPE_WATCHFRR_DAEMON, sizeof(*dmn)); | |
976 | ||
977 | dmn->name = dmn->restart.name = argv[i]; | |
978 | dmn->state = DAEMON_INIT; | |
979 | gs.numdaemons++; | |
980 | gs.numdown++; | |
981 | dmn->fd = -1; | |
982 | dmn->t_wakeup = NULL; | |
983 | thread_add_timer_msec(master, wakeup_init, dmn, | |
984 | 100 + (random() % 900), | |
985 | &dmn->t_wakeup); | |
986 | dmn->restart.interval = gs.min_restart_interval; | |
987 | *add = dmn; | |
988 | add = &dmn->next; | |
989 | ||
990 | if (!strcmp(dmn->name, special)) | |
991 | gs.special = dmn; | |
992 | } | |
993 | ||
994 | if (!gs.daemons) { | |
995 | fprintf(stderr, | |
996 | "Must specify one or more daemons to monitor.\n\n"); | |
997 | frr_help_exit(1); | |
998 | } | |
999 | if (!watch_only && !gs.special) { | |
1000 | fprintf(stderr, "\"%s\" daemon must be in daemon lists\n\n", | |
1001 | special); | |
1002 | frr_help_exit(1); | |
1003 | } | |
1004 | ||
1005 | for (dmn = gs.daemons; dmn; dmn = dmn->next) { | |
1006 | snprintf(p, alldaemons + sizeof(alldaemons) - p, "%s%s", | |
1007 | (p == alldaemons) ? "" : " ", dmn->name); | |
1008 | p += strlen(p); | |
1009 | } | |
1010 | zlog_notice("%s %s watching [%s]%s", progname, FRR_VERSION, alldaemons, | |
1011 | watch_only ? ", monitor mode" : ""); | |
1012 | } | |
1013 | ||
a6810074 | 1014 | struct zebra_privs_t watchfrr_privs = { |
95c4aff2 | 1015 | #ifdef VTY_GROUP |
a6810074 | 1016 | .vty_group = VTY_GROUP, |
95c4aff2 DL |
1017 | #endif |
1018 | }; | |
1019 | ||
4f04a76b DL |
1020 | static struct quagga_signal_t watchfrr_signals[] = { |
1021 | { | |
1022 | .signal = SIGINT, | |
1023 | .handler = sigint, | |
1024 | }, | |
1025 | { | |
1026 | .signal = SIGTERM, | |
1027 | .handler = sigint, | |
1028 | }, | |
1029 | { | |
1030 | .signal = SIGCHLD, | |
1031 | .handler = sigchild, | |
1032 | }, | |
1033 | }; | |
1034 | ||
1035 | FRR_DAEMON_INFO(watchfrr, WATCHFRR, | |
d62a17ae | 1036 | .flags = FRR_NO_PRIVSEP | FRR_NO_TCPVTY | FRR_LIMITED_CLI |
0a7c7856 DL |
1037 | | FRR_NO_CFG_PID_DRY | FRR_NO_ZCLIENT |
1038 | | FRR_DETACH_LATER, | |
4f04a76b | 1039 | |
d62a17ae | 1040 | .printhelp = printhelp, |
1041 | .copyright = "Copyright 2004 Andrew J. Schorr", | |
4f04a76b | 1042 | |
d62a17ae | 1043 | .signals = watchfrr_signals, |
1044 | .n_signals = array_size(watchfrr_signals), | |
4f04a76b | 1045 | |
d62a17ae | 1046 | .privs = &watchfrr_privs, ) |
4f04a76b | 1047 | |
999f153e DL |
1048 | #define DEPRECATED_OPTIONS "aAezR:" |
1049 | ||
a6810074 | 1050 | int main(int argc, char **argv) |
8b886ca7 | 1051 | { |
a6810074 | 1052 | int opt; |
a6810074 | 1053 | const char *blankstr = NULL; |
a6810074 | 1054 | |
4f04a76b DL |
1055 | frr_preinit(&watchfrr_di, argc, argv); |
1056 | progname = watchfrr_di.progname; | |
1057 | ||
999f153e | 1058 | frr_opt_add("b:dk:l:i:p:r:S:s:t:T:" DEPRECATED_OPTIONS, longopts, ""); |
a6810074 DL |
1059 | |
1060 | gs.restart.name = "all"; | |
4f04a76b | 1061 | while ((opt = frr_getopt(argc, argv, NULL)) != EOF) { |
999f153e DL |
1062 | if (opt && opt < 128 && strchr(DEPRECATED_OPTIONS, opt)) { |
1063 | fprintf(stderr, | |
1064 | "The -%c option no longer exists.\n" | |
1065 | "Please refer to the watchfrr(8) man page.\n", | |
1066 | opt); | |
1067 | exit(1); | |
1068 | } | |
1069 | ||
a6810074 DL |
1070 | switch (opt) { |
1071 | case 0: | |
1072 | break; | |
a6810074 DL |
1073 | case 'b': |
1074 | blankstr = optarg; | |
1075 | break; | |
f168b713 DL |
1076 | case OPTION_DRY: |
1077 | watch_only = true; | |
a6810074 DL |
1078 | break; |
1079 | case 'k': | |
1080 | if (!valid_command(optarg)) { | |
1081 | fprintf(stderr, | |
1082 | "Invalid kill command, must contain '%%s': %s\n", | |
1083 | optarg); | |
4f04a76b | 1084 | frr_help_exit(1); |
a6810074 DL |
1085 | } |
1086 | gs.stop_command = optarg; | |
1087 | break; | |
d62a17ae | 1088 | case 'l': { |
1089 | char garbage[3]; | |
1090 | if ((sscanf(optarg, "%d%1s", &gs.loglevel, garbage) | |
1091 | != 1) | |
1092 | || (gs.loglevel < LOG_EMERG)) { | |
1093 | fprintf(stderr, | |
1094 | "Invalid loglevel argument: %s\n", | |
1095 | optarg); | |
1096 | frr_help_exit(1); | |
a6810074 | 1097 | } |
d62a17ae | 1098 | } break; |
1099 | case OPTION_MINRESTART: { | |
1100 | char garbage[3]; | |
1101 | if ((sscanf(optarg, "%ld%1s", &gs.min_restart_interval, | |
1102 | garbage) | |
1103 | != 1) | |
1104 | || (gs.min_restart_interval < 0)) { | |
1105 | fprintf(stderr, | |
1106 | "Invalid min_restart_interval argument: %s\n", | |
1107 | optarg); | |
1108 | frr_help_exit(1); | |
a6810074 | 1109 | } |
d62a17ae | 1110 | } break; |
1111 | case OPTION_MAXRESTART: { | |
1112 | char garbage[3]; | |
1113 | if ((sscanf(optarg, "%ld%1s", &gs.max_restart_interval, | |
1114 | garbage) | |
1115 | != 1) | |
1116 | || (gs.max_restart_interval < 0)) { | |
1117 | fprintf(stderr, | |
1118 | "Invalid max_restart_interval argument: %s\n", | |
1119 | optarg); | |
1120 | frr_help_exit(1); | |
a6810074 | 1121 | } |
d62a17ae | 1122 | } break; |
1123 | case 'i': { | |
1124 | char garbage[3]; | |
1125 | int period; | |
1126 | if ((sscanf(optarg, "%d%1s", &period, garbage) != 1) | |
1127 | || (gs.period < 1)) { | |
1128 | fprintf(stderr, | |
1129 | "Invalid interval argument: %s\n", | |
1130 | optarg); | |
1131 | frr_help_exit(1); | |
a6810074 | 1132 | } |
d62a17ae | 1133 | gs.period = 1000 * period; |
1134 | } break; | |
a6810074 | 1135 | case 'p': |
0a7c7856 | 1136 | watchfrr_di.pid_file = optarg; |
a6810074 DL |
1137 | break; |
1138 | case 'r': | |
a6810074 DL |
1139 | if (!valid_command(optarg)) { |
1140 | fprintf(stderr, | |
1141 | "Invalid restart command, must contain '%%s': %s\n", | |
1142 | optarg); | |
4f04a76b | 1143 | frr_help_exit(1); |
a6810074 DL |
1144 | } |
1145 | gs.restart_command = optarg; | |
a6810074 DL |
1146 | break; |
1147 | case 's': | |
1148 | if (!valid_command(optarg)) { | |
1149 | fprintf(stderr, | |
1150 | "Invalid start command, must contain '%%s': %s\n", | |
1151 | optarg); | |
4f04a76b | 1152 | frr_help_exit(1); |
a6810074 DL |
1153 | } |
1154 | gs.start_command = optarg; | |
1155 | break; | |
1156 | case 'S': | |
1157 | gs.vtydir = optarg; | |
1158 | break; | |
d62a17ae | 1159 | case 't': { |
1160 | char garbage[3]; | |
1161 | if ((sscanf(optarg, "%ld%1s", &gs.timeout, garbage) | |
1162 | != 1) | |
1163 | || (gs.timeout < 1)) { | |
1164 | fprintf(stderr, | |
1165 | "Invalid timeout argument: %s\n", | |
1166 | optarg); | |
1167 | frr_help_exit(1); | |
a6810074 | 1168 | } |
d62a17ae | 1169 | } break; |
1170 | case 'T': { | |
1171 | char garbage[3]; | |
1172 | if ((sscanf(optarg, "%ld%1s", &gs.restart_timeout, | |
1173 | garbage) | |
1174 | != 1) | |
1175 | || (gs.restart_timeout < 1)) { | |
1176 | fprintf(stderr, | |
1177 | "Invalid restart timeout argument: %s\n", | |
1178 | optarg); | |
1179 | frr_help_exit(1); | |
a6810074 | 1180 | } |
d62a17ae | 1181 | } break; |
a6810074 DL |
1182 | default: |
1183 | fputs("Invalid option.\n", stderr); | |
4f04a76b | 1184 | frr_help_exit(1); |
a6810074 | 1185 | } |
8b886ca7 | 1186 | } |
a6810074 | 1187 | |
71e7975a DL |
1188 | if (watch_only |
1189 | && (gs.start_command || gs.stop_command || gs.restart_command)) { | |
d87ae5cc | 1190 | fputs("Options -r/-s/-k are not used when --dry is active.\n", |
a6810074 | 1191 | stderr); |
8b886ca7 | 1192 | } |
f168b713 DL |
1193 | if (!watch_only |
1194 | && (!gs.restart_command || !gs.start_command || !gs.stop_command)) { | |
1195 | fprintf(stderr, | |
1196 | "Options -s (start), -k (kill), and -r (restart) are required.\n"); | |
1197 | frr_help_exit(1); | |
8b886ca7 | 1198 | } |
8b886ca7 | 1199 | |
a6810074 DL |
1200 | if (blankstr) { |
1201 | if (gs.restart_command) | |
1202 | gs.restart_command = | |
d62a17ae | 1203 | translate_blanks(gs.restart_command, blankstr); |
a6810074 DL |
1204 | if (gs.start_command) |
1205 | gs.start_command = | |
d62a17ae | 1206 | translate_blanks(gs.start_command, blankstr); |
a6810074 DL |
1207 | if (gs.stop_command) |
1208 | gs.stop_command = | |
d62a17ae | 1209 | translate_blanks(gs.stop_command, blankstr); |
065de903 | 1210 | } |
8b886ca7 | 1211 | |
a6810074 | 1212 | gs.restart.interval = gs.min_restart_interval; |
8b886ca7 | 1213 | |
4f04a76b | 1214 | master = frr_init(); |
b647dc2a | 1215 | watchfrr_error_init(); |
0a7c7856 DL |
1216 | watchfrr_init(argc, argv); |
1217 | watchfrr_vty_init(); | |
1218 | ||
1219 | frr_config_fork(); | |
4f04a76b | 1220 | |
dd8376fe | 1221 | zlog_set_level(ZLOG_DEST_MONITOR, ZLOG_DISABLED); |
0a7c7856 | 1222 | if (watchfrr_di.daemon_mode) |
dd8376fe | 1223 | zlog_set_level(ZLOG_DEST_SYSLOG, MIN(gs.loglevel, LOG_DEBUG)); |
0a7c7856 | 1224 | else |
dd8376fe | 1225 | zlog_set_level(ZLOG_DEST_STDOUT, MIN(gs.loglevel, LOG_DEBUG)); |
8b886ca7 | 1226 | |
0a7c7856 | 1227 | frr_run(master); |
8b886ca7 | 1228 | |
a6810074 DL |
1229 | systemd_send_stopping(); |
1230 | /* Not reached. */ | |
1231 | return 0; | |
8b886ca7 | 1232 | } |