2 * Copyright (C) 1995, 1997-1999 Jeffrey A. Uphoff
3 * Modified by Olaf Kirch, Oct. 1996.
4 * Modified by H.J. Lu, 1998.
5 * Modified by L. Hohberger of Mission Critical Linux, 2000.
23 #include <rpc/pmap_clnt.h>
25 #include <sys/resource.h>
32 /* Socket operations */
33 #include <sys/types.h>
34 #include <sys/socket.h>
36 /* Added to enable specification of state directory path at run-time
37 * j_carlos_gomez@yahoo.com
40 char * DIR_BASE = DEFAULT_DIR_BASE;
42 char * SM_DIR = DEFAULT_SM_DIR;
43 char * SM_BAK_DIR = DEFAULT_SM_BAK_DIR;
44 char * SM_STAT_PATH = DEFAULT_SM_STAT_PATH;
46 /* ----- end of state directory path stuff ------- */
48 int run_mode = 0; /* foreground logging mode */
50 /* LH - I had these local to main, but it seemed silly to have
51 * two copies of each - one in main(), one static in log.c...
52 * It also eliminates the 256-char static in log.c */
54 const char *version_p = NULL;
56 /* PRC: a high-availability callout program can be specified with -H
57 * When this is done, the program will receive callouts whenever clients
58 * are added or deleted to the notify list */
59 char *ha_callout_prog = NULL;
61 static struct option longopts[] =
63 { "foreground", 0, 0, 'F' },
64 { "no-syslog", 0, 0, 'd' },
65 { "help", 0, 0, 'h' },
66 { "version", 0, 0, 'v' },
67 { "outgoing-port", 1, 0, 'o' },
68 { "port", 1, 0, 'p' },
69 { "name", 1, 0, 'n' },
70 { "state-directory-path", 1, 0, 'P' },
71 { "notify-mode", 0, 0, 'N' },
72 { "ha-callout", 1, 0, 'H' },
73 { "no-notify", 0, 0, 'L' },
77 extern void sm_prog_1 (struct svc_req *, register SVCXPRT *);
78 static void load_state_number(void);
81 extern void simulator (int, char **);
85 #ifdef HAVE_TCP_WRAPPER
86 #include "tcpwrapper.h"
89 sm_prog_1_wrapper (struct svc_req *rqstp, register SVCXPRT *transp)
91 struct sockaddr_in *sin = nfs_getrpccaller_in(transp);
93 /* remote host authorization check */
94 if (sin->sin_family == AF_INET &&
95 !check_default("statd", sin, rqstp->rq_proc, SM_PROG)) {
96 svcerr_auth (transp, AUTH_FAILED);
100 sm_prog_1 (rqstp, transp);
103 #define sm_prog_1 sm_prog_1_wrapper
112 note (N_FATAL, "Caught signal %d, un-registering and exiting.", sig);
113 pmap_unset (SM_PROG, SM_VERS);
121 extern void my_svc_exit (void);
122 dprintf (N_DEBUG, "Caught signal %d, re-notifying (state %d).", sig,
128 * Startup information.
130 static void log_modes(void)
132 char buf[128]; /* watch stack size... */
134 /* No flags = no message */
135 if (!run_mode) return;
138 sprintf(buf,"Flags: ");
139 if (run_mode & MODE_NODAEMON)
140 strcat(buf,"No-Daemon ");
141 if (run_mode & MODE_LOG_STDERR)
142 strcat(buf,"Log-STDERR ");
148 * Since we do more than standard statd stuff, we might need to
149 * help the occasional admin.
154 fprintf(stderr,"usage: %s [options]\n", name_p);
155 fprintf(stderr," -h, -?, --help Print this help screen.\n");
156 fprintf(stderr," -F, --foreground Foreground (no-daemon mode)\n");
157 fprintf(stderr," -d, --no-syslog Verbose logging to stderr. Foreground mode only.\n");
158 fprintf(stderr," -p, --port Port to listen on\n");
159 fprintf(stderr," -o, --outgoing-port Port for outgoing connections\n");
160 fprintf(stderr," -V, -v, --version Display version information and exit.\n");
161 fprintf(stderr," -n, --name Specify a local hostname.\n");
162 fprintf(stderr," -P State directory path.\n");
163 fprintf(stderr," -N Run in notify only mode.\n");
164 fprintf(stderr," -L, --no-notify Do not perform any notification.\n");
165 fprintf(stderr," -H Specify a high-availability callout program.\n");
168 static const char *pidfile = "/var/run/rpc.statd.pid";
171 static void create_pidfile(void)
176 fp = fopen(pidfile, "w");
178 die("Opening %s failed: %s\n",
179 pidfile, strerror(errno));
180 fprintf(fp, "%d\n", getpid());
181 pidfd = dup(fileno(fp));
182 if (fclose(fp) < 0) {
183 note(N_WARNING, "Flushing pid file failed: errno %d (%s)\n",
184 errno, strerror(errno));
188 static void truncate_pidfile(void)
191 if (ftruncate(pidfd, 0) < 0) {
192 note(N_WARNING, "truncating pid file failed: errno %d (%s)\n",
193 errno, strerror(errno));
198 static void drop_privs(void)
202 if (stat(SM_DIR, &st) == -1 &&
203 stat(DIR_BASE, &st) == -1) {
208 if (st.st_uid == 0) {
209 note(N_WARNING, "statd running as root. chown %s to choose different user\n",
213 /* better chown the pid file before dropping, as if it
214 * if over nfs we might loose access
217 if (fchown(pidfd, st.st_uid, st.st_gid) < 0) {
218 note(N_ERROR, "Unable to change owner of %s: %d (%s)",
219 SM_DIR, strerror (errno));
223 if (setgid(st.st_gid) == -1
224 || setuid(st.st_uid) == -1) {
225 note(N_ERROR, "Fail to drop privileges");
230 static void run_sm_notify(int outport)
236 av[ac++] = "/usr/sbin/sm-notify";
237 if (run_mode & MODE_NODAEMON)
240 sprintf(op, "-p%d", outport);
243 if (run_mode & STATIC_HOSTNAME) {
249 fprintf(stderr, "%s: failed to run %s\n", name_p, av[0]);
254 * Entry routine/main loop.
256 int main (int argc, char **argv)
261 int port = 0, out_port = 0;
264 int pipefds[2] = { -1, -1};
267 /* Default: daemon mode, no other options */
270 /* Set the basename */
271 if ((name_p = strrchr(argv[0],'/')) != NULL) {
277 /* Get the version */
278 if ((version_p = strrchr(VERSION,' ')) != NULL) {
287 /* Process command line switches */
288 while ((arg = getopt_long(argc, argv, "h?vVFNH:dn:p:o:P:L", longopts, NULL)) != EOF) {
290 case 'V': /* Version */
292 printf("%s version %s\n",name_p,version_p);
294 case 'F': /* Foreground/nodaemon mode */
295 run_mode |= MODE_NODAEMON;
298 run_mode |= MODE_NOTIFY_ONLY;
300 case 'L': /* Listen only */
301 run_mode |= MODE_NO_NOTIFY;
303 case 'd': /* No daemon only - log to stderr */
304 run_mode |= MODE_LOG_STDERR;
307 out_port = atoi(optarg);
308 if (out_port < 1 || out_port > 65535) {
309 fprintf(stderr, "%s: bad port number: %s\n",
317 if (port < 1 || port > 65535) {
318 fprintf(stderr, "%s: bad port number: %s\n",
324 case 'n': /* Specify local hostname */
325 run_mode |= STATIC_HOSTNAME;
326 MY_NAME = xstrdup(optarg);
330 if ((DIR_BASE = xstrdup(optarg)) == NULL) {
331 fprintf(stderr, "%s: xstrdup(%s) failed!\n",
336 SM_DIR = xmalloc(strlen(DIR_BASE) + 1 + sizeof("sm"));
337 SM_BAK_DIR = xmalloc(strlen(DIR_BASE) + 1 + sizeof("sm.bak"));
338 SM_STAT_PATH = xmalloc(strlen(DIR_BASE) + 1 + sizeof("state"));
341 || (SM_BAK_DIR == NULL)
342 || (SM_STAT_PATH == NULL)) {
344 fprintf(stderr, "%s: xmalloc() failed!\n",
348 if (DIR_BASE[strlen(DIR_BASE)-1] == '/') {
349 sprintf(SM_DIR, "%ssm", DIR_BASE );
350 sprintf(SM_BAK_DIR, "%ssm.bak", DIR_BASE );
351 sprintf(SM_STAT_PATH, "%sstate", DIR_BASE );
353 sprintf(SM_DIR, "%s/sm", DIR_BASE );
354 sprintf(SM_BAK_DIR, "%s/sm.bak", DIR_BASE );
355 sprintf(SM_STAT_PATH, "%s/state", DIR_BASE );
358 case 'H': /* PRC: specify the ha-callout program */
359 if ((ha_callout_prog = xstrdup(optarg)) == NULL) {
360 fprintf(stderr, "%s: xstrdup(%s) failed!\n",
365 case '?': /* heeeeeelllllllpppp? heh */
369 default: /* oh dear ... heh */
375 if (port == out_port && port != 0) {
376 fprintf(stderr, "Listening and outgoing ports cannot be the same!\n");
380 if (run_mode & MODE_NOTIFY_ONLY) {
381 fprintf(stderr, "%s: -N deprecated, consider using /usr/sbin/sm-notify directly\n",
383 run_sm_notify(out_port);
387 if (!(run_mode & MODE_NODAEMON)) {
388 run_mode &= ~MODE_LOG_STDERR; /* Never log to console in
392 if (getrlimit (RLIMIT_NOFILE, &rlim) != 0)
393 fprintf(stderr, "%s: getrlimit (RLIMIT_NOFILE) failed: %s\n",
394 argv [0], strerror(errno));
396 /* glibc sunrpc code dies if getdtablesize > FD_SETSIZE */
397 if (rlim.rlim_cur > FD_SETSIZE) {
398 rlim.rlim_cur = FD_SETSIZE;
400 if (setrlimit (RLIMIT_NOFILE, &rlim) != 0) {
401 fprintf(stderr, "%s: setrlimit (RLIMIT_NOFILE) failed: %s\n",
402 argv [0], strerror(errno));
409 /* LH - I _really_ need to update simulator... */
410 simulator (--argc, ++argv); /* simulator() does exit() */
413 if (!(run_mode & MODE_NODAEMON)) {
416 if (pipe(pipefds)<0) {
417 perror("statd: unable to create pipe");
420 if ((pid = fork ()) < 0) {
421 perror ("statd: Could not fork");
423 } else if (pid != 0) {
425 * Wait for status from child.
428 if (read(pipefds[0], &status, 1) != 1)
435 if (chdir (DIR_BASE) == -1) {
436 perror("statd: Could not chdir");
440 while (pipefds[1] <= 2) {
441 pipefds[1] = dup(pipefds[1]);
443 perror("statd: dup");
447 tempfd = open("/dev/null", O_RDWR);
458 log_init (/*name_p,version_p*/);
462 signal (SIGHUP, killer);
463 signal (SIGINT, killer);
464 signal (SIGTERM, killer);
465 /* PRC: trap SIGUSR1 to re-read notify list from disk */
466 signal(SIGUSR1, sigusr);
467 /* WARNING: the following works on Linux and SysV, but not BSD! */
468 signal(SIGCHLD, SIG_IGN);
470 * Ignore SIGPIPE to avoid statd dying when peers close their
471 * TCP connection while we're trying to reply to them.
473 signal(SIGPIPE, SIG_IGN);
476 atexit(truncate_pidfile);
478 if (! (run_mode & MODE_NO_NOTIFY))
479 switch (pid = fork()) {
481 run_sm_notify(out_port);
486 waitpid(pid, NULL, 0);
489 /* Make sure we have a privilege port for calling into the kernel */
490 if (statd_get_socket() < 0)
493 /* If sm-notify didn't take all the state files, load
494 * state information into our notify-list so we can
495 * pass on any SM_NOTIFY that arrives
499 pmap_unset (SM_PROG, SM_VERS);
501 /* this registers both UDP and TCP services */
502 rpc_init("statd", SM_PROG, SM_VERS, sm_prog_1, port);
504 /* If we got this far, we have successfully started, so notify parent */
505 if (pipefds[1] > 0) {
507 if (write(pipefds[1], &status, 1) != 1) {
508 note(N_WARNING, "writing to parent pipe failed: errno %d (%s)\n",
509 errno, strerror(errno));
519 * Handle incoming requests: SM_NOTIFY socket requests, as
520 * well as callbacks from lockd.
522 my_svc_run(); /* I rolled my own, Olaf made it better... */
524 /* Only get here when simulating a crash so we should probably
525 * start sm-notify running again. As we have already dropped
526 * privileges, this might not work, but I don't think
527 * responding to SM_SIMU_CRASH is an important use cases to
530 if (! (run_mode & MODE_NO_NOTIFY))
531 switch (pid = fork()) {
533 run_sm_notify(out_port);
538 waitpid(pid, NULL, 0);
546 load_state_number(void)
549 const char *file = "/proc/sys/fs/nfs/nsm_local_state";
551 if ((fd = open(SM_STAT_PATH, O_RDONLY)) == -1)
554 if (read(fd, &MY_STATE, sizeof(MY_STATE)) != sizeof(MY_STATE)) {
555 note(N_WARNING, "Unable to read state from '%s': errno %d (%s)",
556 SM_STAT_PATH, errno, strerror(errno));
559 fd = open(file, O_WRONLY);
562 snprintf(buf, sizeof(buf), "%d", MY_STATE);
563 if (write(fd, buf, strlen(buf)) != strlen(buf))
564 note(N_WARNING, "Writing to '%s' failed: errno %d (%s)",
565 file, errno, strerror(errno));