char * name;
char * path;
nsm_address addr;
+ struct addrinfo *ai;
time_t last_used;
time_t send_next;
unsigned int timeout;
struct nsm_host * find_host(uint32_t);
static int addr_get_port(nsm_address *);
static void addr_set_port(nsm_address *, int);
-static int host_lookup(int, const char *, nsm_address *);
+static struct addrinfo *host_lookup(int, const char *);
void nsm_log(int fac, const char *fmt, ...);
-static int record_pid();
+static int record_pid(void);
static void drop_privs(void);
+static void set_kernel_nsm_state(int state);
static struct nsm_host * hosts = NULL;
backup_hosts(_SM_DIR_PATH, _SM_BAK_PATH);
get_hosts(_SM_BAK_PATH);
+ /* Get and update the NSM state. This will call sync() */
+ nsm_state = nsm_get_state(opt_update_state);
+ set_kernel_nsm_state(nsm_state);
+
if (!opt_debug) {
if (!opt_quiet)
printf("Backgrounding to notify hosts...\n");
close(2);
}
- /* Get and update the NSM state. This will call sync() */
- nsm_state = nsm_get_state(opt_update_state);
-
notify();
if (hosts) {
nsm_address local_addr;
time_t failtime = 0;
int sock = -1;
+ int retry_cnt = 0;
+ retry:
sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0) {
perror("socket");
/* Bind source IP if provided on command line */
if (opt_srcaddr) {
- if (!host_lookup(AF_INET, opt_srcaddr, &local_addr)) {
+ struct addrinfo *ai = host_lookup(AF_INET, opt_srcaddr);
+ if (!ai) {
nsm_log(LOG_WARNING,
"Not a valid hostname or address: \"%s\"\n",
opt_srcaddr);
exit(1);
}
+ memcpy(&local_addr, ai->ai_addr, ai->ai_addrlen);
/* We know it's IPv4 at this point */
}
exit(1);
}
} else {
- (void) bindresvport(sock, (struct sockaddr_in *) &local_addr);
+ struct servent *se;
+ struct sockaddr_in *sin = (struct sockaddr_in *)&local_addr;
+ (void) bindresvport(sock, sin);
+ /* try to avoid known ports */
+ se = getservbyport(sin->sin_port, "udp");
+ if (se && retry_cnt < 100) {
+ retry_cnt++;
+ close(sock);
+ goto retry;
+ }
}
if (opt_max_retry)
*p++ = htonl(2);
/* If we retransmitted 4 times, reset the port to force
- * a new portmap lookup (in case statd was restarted)
+ * a new portmap lookup (in case statd was restarted).
+ * We also rotate through multiple IP addresses at this
+ * point.
*/
if (host->retries >= 4) {
+ struct addrinfo *hold = host->ai;
+ struct addrinfo **next = &host->ai;
+ *next = hold->ai_next;
+ while ( *next )
+ next = & (*next)->ai_next;
+ *next = hold;
+ hold->ai_next = NULL;
+ memcpy(&host->addr, hold->ai_addr, hold->ai_addrlen);
addr_set_port(&host->addr, 0);
host->retries = 0;
}
free(hp->name);
free(hp->path);
free(hp);
+ freeaddrinfo(hp->ai);
return;
}
}
host = calloc(1, sizeof(*host));
snprintf(path, sizeof(path), "%s/%s", dirname, de->d_name);
- if (!host_lookup(AF_UNSPEC, de->d_name, &host->addr)) {
+ if (stat(path, &stb) < 0)
+ continue;
+
+ host->ai = host_lookup(AF_UNSPEC, de->d_name);
+ if (! host->ai) {
nsm_log(LOG_WARNING,
"%s doesn't seem to be a valid address, skipped",
de->d_name);
continue;
}
- if (stat(path, &stb) < 0)
- continue;
host->last_used = stb.st_mtime;
host->timeout = NSM_TIMEOUT;
host->path = strdup(path);
host->name = strdup(de->d_name);
+ host->retries = 100; /* force address retry */
insert_host(host);
host = NULL;
}
}
-static int
-host_lookup(int af, const char *name, nsm_address *addr)
+static struct addrinfo *
+host_lookup(int af, const char *name)
{
struct addrinfo hints, *ai;
- int okay = 0;
memset(&hints, 0, sizeof(hints));
hints.ai_family = af;
+ hints.ai_protocol = IPPROTO_UDP;
if (getaddrinfo(name, NULL, &hints, &ai) != 0)
- return 0;
-
- if (ai->ai_addrlen < sizeof(*addr)) {
- memcpy(addr, ai->ai_addr, ai->ai_addrlen);
- okay = 1;
- }
+ return NULL;
- freeaddrinfo(ai);
- return okay;
+ return ai;
}
/*
* program exits.
* If file already exists, fail.
*/
-static int record_pid()
+static int record_pid(void)
{
char pid[20];
int fd;
exit(1);
}
}
+
+static void set_kernel_nsm_state(int state)
+{
+ int fd;
+
+ fd = open("/proc/sys/fs/nfs/nsm_local_state",O_WRONLY);
+ if (fd >= 0) {
+ char buf[20];
+ snprintf(buf, sizeof(buf), "%d", state);
+ write(fd, buf, strlen(buf));
+ close(fd);
+ }
+}