* NSM for Linux.
*/
-#include "config.h"
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <sys/stat.h>
#include <limits.h>
#include <signal.h>
#include <unistd.h>
#include <fcntl.h>
+#include <errno.h>
#include <string.h>
#include <getopt.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <rpcmisc.h>
+#include <sys/resource.h>
+#include <grp.h>
#include "statd.h"
#include "version.h"
+#include "nfslib.h"
/* Socket operations */
#include <sys/types.h>
char *name_p = NULL;
char *version_p = NULL;
+/* PRC: a high-availability callout program can be specified with -H
+ * When this is done, the program will receive callouts whenever clients
+ * are added or deleted to the notify list */
+char *ha_callout_prog = NULL;
+
static struct option longopts[] =
{
{ "foreground", 0, 0, 'F' },
{ "name", 1, 0, 'n' },
{ "state-directory-path", 1, 0, 'P' },
{ "notify-mode", 0, 0, 'N' },
+ { "ha-callout", 1, 0, 'H' },
{ NULL, 0, 0, 0 }
};
static void
killer (int sig)
{
- log (L_FATAL, "Caught signal %d, un-registering and exiting.", sig);
- pmap_unset (SM_PROG, SM_VERS);
+ note (N_FATAL, "Caught signal %d, un-registering and exiting.", sig);
+ if (!(run_mode & MODE_NOTIFY_ONLY))
+ pmap_unset (SM_PROG, SM_VERS);
+
exit (0);
}
+static void
+sigusr (int sig)
+{
+ dprintf (N_DEBUG, "Caught signal %d, re-notifying (state %d).", sig,
+ MY_STATE);
+ re_notify = 1;
+}
+
/*
* Startup information.
*/
{
strcat(buf,"Notify-Only ");
}
- log(L_WARNING,buf);
+ note(N_WARNING,buf);
/* future: IP aliasing
if (run_mode & MODE_NOTIFY_ONLY)
{
- dprintf(L_DEBUG,"Notify IP: %s",svr_addr);
+ dprintf(N_DEBUG,"Notify IP: %s",svr_addr);
} */
}
fprintf(stderr," -n, --name Specify a local hostname.\n");
fprintf(stderr," -P State directory path.\n");
fprintf(stderr," -N Run in notify only mode.\n");
+ fprintf(stderr," -H Specify a high-availability callout program.\n");
+}
+
+static const char *pidfile = "/var/run/rpc.statd.pid";
+
+int pidfd = -1;
+static void create_pidfile(void)
+{
+ FILE *fp;
+
+ unlink(pidfile);
+ fp = fopen(pidfile, "w");
+ if (!fp)
+ die("Opening %s failed: %s\n",
+ pidfile, strerror(errno));
+ fprintf(fp, "%d\n", getpid());
+ pidfd = dup(fileno(fp));
+ if (fclose(fp) < 0)
+ note(N_WARNING, "Flushing pid file failed.\n");
+}
+
+static void truncate_pidfile(void)
+{
+ if (pidfd >= 0)
+ ftruncate(pidfd, 0);
+}
+
+static void drop_privs(void)
+{
+ struct stat st;
+
+ if (stat(SM_DIR, &st) == -1 &&
+ stat(DIR_BASE, &st) == -1) {
+ st.st_uid = 0;
+ st.st_gid = 0;
+ }
+
+ if (st.st_uid == 0) {
+ note(N_WARNING, "statd running as root. chown %s to choose different user\n",
+ SM_DIR);
+ return;
+ }
+ /* better chown the pid file before dropping, as if it
+ * if over nfs we might loose access
+ */
+ if (pidfd >= 0)
+ fchown(pidfd, st.st_uid, st.st_gid);
+
+ setgroups(0, NULL);
+ if (setgid(st.st_gid) == -1
+ || setuid(st.st_uid) == -1) {
+ note(N_ERROR, "Fail to drop privileges");
+ exit(1);
+ }
}
/*
int pid;
int arg;
int port = 0, out_port = 0;
+ struct rlimit rlim;
+
+ int pipefds[2] = { -1, -1};
+ char status;
/* Default: daemon mode, no other options */
run_mode = 0;
MY_NAME = NULL;
/* Process command line switches */
- while ((arg = getopt_long(argc, argv, "h?vVFNdn:p:o:P:", longopts, NULL)) != EOF) {
+ while ((arg = getopt_long(argc, argv, "h?vVFNH:dn:p:o:P:", longopts, NULL)) != EOF) {
switch (arg) {
case 'V': /* Version */
case 'v':
}
break;
case 'n': /* Specify local hostname */
+ run_mode |= STATIC_HOSTNAME;
MY_NAME = xstrdup(optarg);
break;
case 'P':
sprintf(SM_STAT_PATH, "%s/state", DIR_BASE );
}
break;
+ case 'H': /* PRC: specify the ha-callout program */
+ if ((ha_callout_prog = xstrdup(optarg)) == NULL) {
+ fprintf(stderr, "%s: xstrdup(%s) failed!\n",
+ argv[0], optarg);
+ exit(1);
+ }
+ break;
case '?': /* heeeeeelllllllpppp? heh */
case 'h':
usage();
daemon mode. */
}
- log_init (name_p,version_p);
-
- log_modes();
+ if (getrlimit (RLIMIT_NOFILE, &rlim) != 0)
+ fprintf(stderr, "%s: getrlimit (RLIMIT_NOFILE) failed: %s\n",
+ argv [0], strerror(errno));
+ else {
+ /* glibc sunrpc code dies if getdtablesize > FD_SETSIZE */
+ if (rlim.rlim_cur > FD_SETSIZE) {
+ rlim.rlim_cur = FD_SETSIZE;
+
+ if (setrlimit (RLIMIT_NOFILE, &rlim) != 0) {
+ fprintf(stderr, "%s: setrlimit (RLIMIT_NOFILE) failed: %s\n",
+ argv [0], strerror(errno));
+ }
+ }
+ }
#ifdef SIMULATIONS
if (argc > 1)
if (!(run_mode & MODE_NODAEMON)) {
int filedes, fdmax, tempfd;
+ if (pipe(pipefds)<0) {
+ perror("statd: unable to create pipe");
+ exit(1);
+ }
if ((pid = fork ()) < 0) {
- perror ("Could not fork");
+ perror ("statd: Could not fork");
exit (1);
} else if (pid != 0) {
- /* Parent. */
+ /* Parent.
+ * Wait for status from child.
+ */
+ close(pipefds[1]);
+ if (read(pipefds[0], &status, 1) != 1)
+ exit(1);
exit (0);
}
/* Child. */
+ close(pipefds[0]);
setsid ();
- chdir (DIR_BASE);
+ if (chdir (DIR_BASE) == -1) {
+ perror("statd: Could not chdir");
+ exit(1);
+ }
- tempfd = open("/dev/null", O_RDWR);
- close(0); dup2(tempfd, 0);
- close(1); dup2(tempfd, 1);
- close(2); dup2(tempfd, 2);
- fdmax = sysconf (_SC_OPEN_MAX);
- for (filedes = 3; filedes < fdmax; filedes++) {
- close (filedes);
+ while (pipefds[1] <= 2) {
+ pipefds[1] = dup(pipefds[1]);
+ if (pipefds[1]<0) {
+ perror("statd: dup");
+ exit(1);
+ }
}
+ tempfd = open("/dev/null", O_RDWR);
+ dup2(tempfd, 0);
+ dup2(tempfd, 1);
+ dup2(tempfd, 2);
+ dup2(pipefds[1], 3);
+ pipefds[1] = 3;
+ closeall(4);
}
/* Child. */
+
+ log_init (name_p,version_p);
+
+ log_modes();
+
signal (SIGHUP, killer);
signal (SIGINT, killer);
signal (SIGTERM, killer);
+ /* PRC: trap SIGUSR1 to re-read notify list from disk */
+ signal(SIGUSR1, sigusr);
/* WARNING: the following works on Linux and SysV, but not BSD! */
signal(SIGCHLD, SIG_IGN);
+ /*
+ * Ignore SIGPIPE to avoid statd dying when peers close their
+ * TCP connection while we're trying to reply to them.
+ */
+ signal(SIGPIPE, SIG_IGN);
/* initialize out_port */
statd_get_socket(out_port);
+ create_pidfile();
+ atexit(truncate_pidfile);
+ drop_privs();
+
for (;;) {
- pmap_unset (SM_PROG, SM_VERS);
+ if (!(run_mode & MODE_NOTIFY_ONLY)) {
+ /* Do not do pmap_unset() when running in notify mode.
+ * We may clear the portmapper record for a statd not
+ * running in notify mode disabling it.
+ * Juan C. Gomez j_carlos_gomez@yahoo.com
+ */
+ pmap_unset (SM_PROG, SM_VERS);
+ }
change_state ();
shuffle_dirs (); /* Move directory names around */
+
+ /* If we got this far, we have successfully started, so notify parent */
+ if (pipefds[1] > 0) {
+ status = 0;
+ write(pipefds[1], &status, 1);
+ close(pipefds[1]);
+ pipefds[1] = -1;
+ }
+
notify_hosts (); /* Send out notify requests */
++restart;
projects / nfs-utils.git / blobdiff