* Copyright (C) 2004-2006 Olaf Kirch <okir@suse.de>
*/
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <stdarg.h>
#include <netdb.h>
#include <errno.h>
+#include <grp.h>
#ifndef BASEDIR
-#define BASEDIR "/var/lib/nfs"
+# ifdef NFS_STATEDIR
+# define BASEDIR NFS_STATEDIR
+# else
+# define BASEDIR "/var/lib/nfs"
+# endif
#endif
#define DEFAULT_SM_STATE_PATH BASEDIR "/state"
char * name;
char * path;
nsm_address addr;
+ struct addrinfo *ai;
time_t last_used;
time_t send_next;
unsigned int timeout;
static unsigned int nsm_get_state(int);
static void notify(void);
-static void notify_host(int, struct nsm_host *);
+static int notify_host(int, struct nsm_host *);
static void recv_reply(int);
static void backup_hosts(const char *, const char *);
static void get_hosts(const char *);
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;
if (optind < argc) {
usage: fprintf(stderr,
"Usage: sm-notify [-dfq] [-m max-retry-minutes] [-p srcport]\n"
- " [-P /path/to/state/directory] [-N my_host_name\n");
+ " [-P /path/to/state/directory] [-v my_host_name]\n");
return 1;
}
if (strcmp(_SM_BASE_PATH, BASEDIR) == 0) {
- if (record_pid() == 0 && force == 0 && opt_update_state == 0)
+ if (record_pid() == 0 && force == 0 && opt_update_state == 1)
/* already run, don't try again */
exit(0);
}
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)
if (failtime && now >= failtime)
break;
- while ((wait = hosts->send_next - now) <= 0) {
+ while (hosts && ((wait = hosts->send_next - now) <= 0)) {
/* Never send more than 10 packets at once */
if (sent++ >= 10)
break;
hp = hosts;
hosts = hp->next;
- notify_host(sock, hp);
+ if (notify_host(sock, hp)){
+ unlink(hp->path);
+ free(hp->name);
+ free(hp->path);
+ free(hp);
+ continue;
+ }
/* Set the timeout for this call, using an
exponential timeout strategy */
insert_host(hp);
}
+ if (hosts == NULL)
+ return;
nsm_log(LOG_DEBUG, "Host %s due in %ld seconds",
hosts->name, wait);
/*
* Send notification to a single host
*/
-void
+int
notify_host(int sock, struct nsm_host *host)
{
static unsigned int xid = 0;
if (!host->xid)
host->xid = xid++;
+ if (host->ai == NULL) {
+ host->ai = host_lookup(AF_UNSPEC, host->name);
+ if (host->ai == NULL) {
+ nsm_log(LOG_WARNING,
+ "%s doesn't seem to be a valid address,"
+ " skipped", host->name);
+ return 1;
+ }
+ }
+
memset(msgbuf, 0, sizeof(msgbuf));
p = msgbuf;
*p++ = htonl(host->xid);
*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 *first = host->ai;
+ struct addrinfo **next = &host->ai;
+
+ /* remove the first entry from the list */
+ host->ai = first->ai_next;
+ first->ai_next = NULL;
+ /* find the end of the list */
+ next = &first->ai_next;
+ while ( *next )
+ next = & (*next)->ai_next;
+ /* put first entry at end */
+ *next = first;
+ memcpy(&host->addr, first->ai_addr, first->ai_addrlen);
addr_set_port(&host->addr, 0);
host->retries = 0;
}
}
len = (p - msgbuf) << 2;
- sendto(sock, msgbuf, len, 0, (struct sockaddr *) &dest, sizeof(dest));
+ if (sendto(sock, msgbuf, len, 0, (struct sockaddr *) &dest, sizeof(dest)) < 0)
+ nsm_log(LOG_WARNING, "Sending Reboot Notification to "
+ "'%s' failed: errno %d (%s)", host->name, errno, strerror(errno));
+
+ return 0;
}
/*
free(hp->name);
free(hp->path);
free(hp);
+ freeaddrinfo(hp->ai);
return;
}
}
}
/*
- * Get all entries from sm.bak and convert them to host names
+ * Get all entries from sm.bak and convert them to host entries
*/
static void
get_hosts(const char *dirname)
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)) {
- nsm_log(LOG_WARNING,
- "%s doesn't seem to be a valid address, skipped",
- de->d_name);
- unlink(path);
- 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;
+ return NULL;
- if (ai->ai_addrlen < sizeof(*addr)) {
- memcpy(addr, ai->ai_addr, ai->ai_addrlen);
- okay = 1;
- }
-
- 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;
snprintf(pid, 20, "%d\n", getpid());
fd = open("/var/run/sm-notify.pid", O_CREAT|O_EXCL|O_WRONLY, 0600);
- if (!fd)
+ if (fd < 0)
return 0;
write(fd, pid, strlen(pid));
close(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);
+ }
+}
projects / nfs-utils.git / blobdiff