* 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 <errno.h>
#include <grp.h>
-#include "config.h"
+#include "xlog.h"
#ifndef BASEDIR
# ifdef NFS_STATEDIR
#define NSM_MAX_TIMEOUT 120 /* don't make this too big */
#define MAXMSGSIZE 256
-typedef struct sockaddr_storage nsm_address;
-
struct nsm_host {
struct nsm_host * next;
char * name;
char * path;
- nsm_address addr;
+ struct sockaddr_storage addr;
struct addrinfo *ai;
time_t last_used;
time_t send_next;
static char nsm_hostname[256];
static uint32_t nsm_state;
static int opt_debug = 0;
-static int opt_quiet = 0;
static int opt_update_state = 1;
static unsigned int opt_max_retry = 15 * 60;
static char * opt_srcaddr = 0;
static uint16_t opt_srcport = 0;
-static int log_syslog = 0;
static unsigned int nsm_get_state(int);
static void notify(void);
static void backup_hosts(const char *, const char *);
static void get_hosts(const char *);
static void insert_host(struct nsm_host *);
-struct nsm_host * find_host(uint32_t);
-static int addr_get_port(nsm_address *);
-static void addr_set_port(nsm_address *, int);
-static struct addrinfo *host_lookup(int, const char *);
-void nsm_log(int fac, const char *fmt, ...);
+static struct nsm_host *find_host(uint32_t);
static int record_pid(void);
static void drop_privs(void);
-static void set_kernel_nsm_state(int state);
+static void set_kernel_nsm_state(int state);
static struct nsm_host * hosts = NULL;
+/*
+ * Address handling utilities
+ */
+
+static unsigned short smn_get_port(const struct sockaddr *sap)
+{
+ switch (sap->sa_family) {
+ case AF_INET:
+ return ntohs(((struct sockaddr_in *)sap)->sin_port);
+ case AF_INET6:
+ return ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
+ }
+ return 0;
+}
+
+static void smn_set_port(struct sockaddr *sap, const unsigned short port)
+{
+ switch (sap->sa_family) {
+ case AF_INET:
+ ((struct sockaddr_in *)sap)->sin_port = htons(port);
+ break;
+ case AF_INET6:
+ ((struct sockaddr_in6 *)sap)->sin6_port = htons(port);
+ break;
+ }
+}
+
+static struct addrinfo *smn_lookup(const char *name)
+{
+ struct addrinfo *ai, hint = {
+#if HAVE_DECL_AI_ADDRCONFIG
+ .ai_flags = AI_ADDRCONFIG,
+#endif /* HAVE_DECL_AI_ADDRCONFIG */
+ .ai_family = AF_INET,
+ .ai_protocol = IPPROTO_UDP,
+ };
+ int error;
+
+ error = getaddrinfo(name, NULL, &hint, &ai);
+ if (error) {
+ xlog(D_GENERAL, "getaddrinfo(3): %s", gai_strerror(error));
+ return NULL;
+ }
+
+ return ai;
+}
+
+static void smn_forget_host(struct nsm_host *host)
+{
+ unlink(host->path);
+ free(host->path);
+ free(host->name);
+ if (host->ai)
+ freeaddrinfo(host->ai);
+
+ free(host);
+}
+
int
main(int argc, char **argv)
{
int c;
int force = 0;
+ char * progname;
- while ((c = getopt(argc, argv, "dm:np:v:qP:f")) != -1) {
+ progname = strrchr(argv[0], '/');
+ if (progname != NULL)
+ progname++;
+ else
+ progname = argv[0];
+
+ while ((c = getopt(argc, argv, "dm:np:v:P:f")) != -1) {
switch (c) {
case 'f':
force = 1;
case 'v':
opt_srcaddr = optarg;
break;
- case 'q':
- opt_quiet = 1;
- break;
case 'P':
_SM_BASE_PATH = strdup(optarg);
_SM_STATE_PATH = malloc(strlen(optarg)+1+sizeof("state"));
_SM_STATE_PATH == NULL ||
_SM_DIR_PATH == NULL ||
_SM_BAK_PATH == NULL) {
- nsm_log(LOG_WARNING, "unable to allocate memory");
+ fprintf(stderr, "unable to allocate memory");
exit(1);
}
strcat(strcpy(_SM_STATE_PATH, _SM_BASE_PATH), "/state");
if (optind < argc) {
usage: fprintf(stderr,
- "Usage: sm-notify [-dfq] [-m max-retry-minutes] [-p srcport]\n"
- " [-P /path/to/state/directory] [-v my_host_name]\n");
- return 1;
+ "Usage: %s -notify [-dfq] [-m max-retry-minutes] [-p srcport]\n"
+ " [-P /path/to/state/directory] [-v my_host_name]\n",
+ progname);
+ exit(1);
}
+ xlog_syslog(1);
+ if (opt_debug) {
+ xlog_stderr(1);
+ xlog_config(D_ALL, 1);
+ } else
+ xlog_stderr(0);
+
+ xlog_open(progname);
+ xlog(L_NOTICE, "Version " VERSION " starting");
+
if (strcmp(_SM_BASE_PATH, BASEDIR) == 0) {
- if (record_pid() == 0 && force == 0 && opt_update_state == 1)
+ if (record_pid() == 0 && force == 0 && opt_update_state == 1) {
/* already run, don't try again */
+ xlog(L_NOTICE, "Already notifying clients; Exiting!");
exit(0);
+ }
}
if (opt_srcaddr) {
strncpy(nsm_hostname, opt_srcaddr, sizeof(nsm_hostname)-1);
} else
if (gethostname(nsm_hostname, sizeof(nsm_hostname)) < 0) {
- perror("gethostname");
- return 1;
+ xlog(L_ERROR, "Failed to obtain name of local host: %m");
+ exit(1);
}
backup_hosts(_SM_DIR_PATH, _SM_BAK_PATH);
get_hosts(_SM_BAK_PATH);
+ /* If there are not hosts to notify, just exit */
+ if (!hosts) {
+ xlog(D_GENERAL, "No hosts to notify; exiting");
+ return 0;
+ }
+
/* 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");
-
- openlog("sm-notify", LOG_PID, LOG_DAEMON);
- log_syslog = 1;
+ xlog(L_NOTICE, "Backgrounding to notify hosts...\n");
if (daemon(0, 0) < 0) {
- nsm_log(LOG_WARNING, "unable to background: %s",
- strerror(errno));
- return 1;
+ xlog(L_ERROR, "unable to background: %m");
+ exit(1);
}
close(0);
while ((hp = hosts) != 0) {
hosts = hp->next;
- nsm_log(LOG_NOTICE,
- "Unable to notify %s, giving up",
+ xlog(L_NOTICE, "Unable to notify %s, giving up",
hp->name);
}
- return 1;
+ exit(1);
}
- return 0;
+ exit(0);
}
/*
* Notify hosts
*/
-void
+static void
notify(void)
{
- nsm_address local_addr;
+ struct sockaddr_storage address;
+ struct sockaddr *local_addr = (struct sockaddr *)&address;
time_t failtime = 0;
int sock = -1;
int retry_cnt = 0;
retry:
sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0) {
- perror("socket");
+ xlog(L_ERROR, "Failed to create RPC socket: %m");
exit(1);
}
fcntl(sock, F_SETFL, O_NONBLOCK);
- memset(&local_addr, 0, sizeof(local_addr));
- local_addr.ss_family = AF_INET; /* Default to IPv4 */
+ memset(&address, 0, sizeof(address));
+ local_addr->sa_family = AF_INET; /* Default to IPv4 */
/* Bind source IP if provided on command line */
if (opt_srcaddr) {
- struct addrinfo *ai = host_lookup(AF_INET, opt_srcaddr);
+ struct addrinfo *ai = smn_lookup(opt_srcaddr);
if (!ai) {
- nsm_log(LOG_WARNING,
- "Not a valid hostname or address: \"%s\"\n",
+ xlog(L_ERROR,
+ "Not a valid hostname or address: \"%s\"",
opt_srcaddr);
exit(1);
}
- memcpy(&local_addr, ai->ai_addr, ai->ai_addrlen);
+
/* We know it's IPv4 at this point */
+ memcpy(local_addr, ai->ai_addr, ai->ai_addrlen);
+
+ freeaddrinfo(ai);
}
/* Use source port if provided on the command line,
* otherwise use bindresvport */
if (opt_srcport) {
- addr_set_port(&local_addr, opt_srcport);
- if (bind(sock, (struct sockaddr *) &local_addr, sizeof(local_addr)) < 0) {
- perror("bind");
+ smn_set_port(local_addr, opt_srcport);
+ if (bind(sock, local_addr, sizeof(struct sockaddr_in)) < 0) {
+ xlog(L_ERROR, "Failed to bind RPC socket: %m");
exit(1);
}
} else {
struct servent *se;
- struct sockaddr_in *sin = (struct sockaddr_in *)&local_addr;
+ struct sockaddr_in *sin = (struct sockaddr_in *)local_addr;
(void) bindresvport(sock, sin);
/* try to avoid known ports */
se = getservbyport(sin->sin_port, "udp");
hp = hosts;
hosts = hp->next;
- if (notify_host(sock, hp)){
- unlink(hp->path);
- free(hp->name);
- free(hp->path);
- free(hp);
+ if (notify_host(sock, hp))
continue;
- }
/* Set the timeout for this call, using an
exponential timeout strategy */
if (hosts == NULL)
return;
- nsm_log(LOG_DEBUG, "Host %s due in %ld seconds",
+ xlog(D_GENERAL, "Host %s due in %ld seconds",
hosts->name, wait);
pfd.fd = sock;
/*
* Send notification to a single host
*/
-int
+static int
notify_host(int sock, struct nsm_host *host)
{
+ struct sockaddr_storage address;
+ struct sockaddr *dest = (struct sockaddr *)&address;
+ socklen_t destlen = sizeof(address);
static unsigned int xid = 0;
- nsm_address dest;
uint32_t msgbuf[MAXMSGSIZE], *p;
unsigned int len;
host->xid = xid++;
if (host->ai == NULL) {
- host->ai = host_lookup(AF_UNSPEC, host->name);
+ host->ai = smn_lookup(host->name);
if (host->ai == NULL) {
- nsm_log(LOG_WARNING,
- "%s doesn't seem to be a valid address,"
- " skipped", host->name);
- return 1;
+ xlog_warn("DNS resolution of %s failed; "
+ "retrying later", host->name);
+ return 0;
}
}
* 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);
+ /* don't rotate if there is only one addrinfo */
+ if (host->ai->ai_next == NULL)
+ memcpy(&host->addr, host->ai->ai_addr,
+ host->ai->ai_addrlen);
+ else {
+ 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);
+ }
+
+ smn_set_port((struct sockaddr *)&host->addr, 0);
host->retries = 0;
}
- dest = host->addr;
- if (addr_get_port(&dest) == 0) {
+ memcpy(dest, &host->addr, destlen);
+ if (smn_get_port(dest) == 0) {
/* Build a PMAP packet */
- nsm_log(LOG_DEBUG, "Sending portmap query to %s", host->name);
+ xlog(D_GENERAL, "Sending portmap query to %s", host->name);
- addr_set_port(&dest, 111);
+ smn_set_port(dest, 111);
*p++ = htonl(100000);
*p++ = htonl(2);
*p++ = htonl(3);
*p++ = 0;
} else {
/* Build an SM_NOTIFY packet */
- nsm_log(LOG_DEBUG, "Sending SM_NOTIFY to %s", host->name);
+ xlog(D_GENERAL, "Sending SM_NOTIFY to %s", host->name);
*p++ = htonl(NSM_PROGRAM);
*p++ = htonl(NSM_VERSION);
}
len = (p - msgbuf) << 2;
- 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));
+ if (sendto(sock, msgbuf, len, 0, dest, destlen) < 0)
+ xlog_warn("Sending Reboot Notification to "
+ "'%s' failed: errno %d (%m)", host->name, errno);
return 0;
}
/*
* Receive reply from remote host
*/
-void
+static void
recv_reply(int sock)
{
struct nsm_host *hp;
+ struct sockaddr *sap;
uint32_t msgbuf[MAXMSGSIZE], *p, *end;
uint32_t xid;
int res;
if (res < 0)
return;
- nsm_log(LOG_DEBUG, "Received packet...");
+ xlog(D_GENERAL, "Received packet...");
p = msgbuf;
end = p + (res >> 2);
this reply */
if ((hp = find_host(xid)) == NULL)
return;
+ sap = (struct sockaddr *)&hp->addr;
- if (addr_get_port(&hp->addr) == 0) {
+ if (smn_get_port(sap) == 0) {
/* This was a portmap request */
unsigned int port;
if (port == 0) {
/* No binding for statd. Delay the next
* portmap query for max timeout */
- nsm_log(LOG_DEBUG, "No statd on %s", hp->name);
+ xlog(D_GENERAL, "No statd on %s", hp->name);
hp->timeout = NSM_MAX_TIMEOUT;
hp->send_next += NSM_MAX_TIMEOUT;
} else {
- addr_set_port(&hp->addr, port);
+ smn_set_port(sap, port);
if (hp->timeout >= NSM_MAX_TIMEOUT / 4)
hp->timeout = NSM_MAX_TIMEOUT / 4;
}
* packet)
*/
if (p <= end) {
- nsm_log(LOG_DEBUG, "Host %s notified successfully", hp->name);
- unlink(hp->path);
- free(hp->name);
- free(hp->path);
- free(hp);
- freeaddrinfo(hp->ai);
+ xlog(D_GENERAL, "Host %s notified successfully",
+ hp->name);
+ smn_forget_host(hp);
return;
}
}
DIR *dir;
if (!(dir = opendir(dirname))) {
- perror(dirname);
+ xlog_warn("Failed to open %s: %m", dirname);
return;
}
snprintf(src, sizeof(src), "%s/%s", dirname, de->d_name);
snprintf(dst, sizeof(dst), "%s/%s", bakname, de->d_name);
- if (rename(src, dst) < 0) {
- nsm_log(LOG_WARNING,
- "Failed to rename %s -> %s: %m",
- src, dst);
- }
+ if (rename(src, dst) < 0)
+ xlog_warn("Failed to rename %s -> %s: %m", src, dst);
}
closedir(dir);
}
DIR *dir;
if (!(dir = opendir(dirname))) {
- perror(dirname);
+ xlog_warn("Failed to open %s: %m", dirname);
return;
}
continue;
if (host == NULL)
host = calloc(1, sizeof(*host));
+ if (host == NULL) {
+ xlog_warn("Unable to allocate memory");
+ return;
+ }
snprintf(path, sizeof(path), "%s/%s", dirname, de->d_name);
if (stat(path, &stb) < 0)
/*
* Insert host into sorted list
*/
-void
+static void
insert_host(struct nsm_host *host)
{
struct nsm_host **where, *p;
/*
* Find host given the XID
*/
-struct nsm_host *
+static struct nsm_host *
find_host(uint32_t xid)
{
struct nsm_host **where, *p;
/*
* Retrieve the current NSM state
*/
-unsigned int
+static unsigned int
nsm_get_state(int update)
{
char newfile[PATH_MAX];
int fd, state;
if ((fd = open(_SM_STATE_PATH, O_RDONLY)) < 0) {
- if (!opt_quiet) {
- nsm_log(LOG_WARNING, "%s: %m", _SM_STATE_PATH);
- nsm_log(LOG_WARNING, "Creating %s, set initial state 1",
- _SM_STATE_PATH);
- }
+ xlog_warn("%s: %m", _SM_STATE_PATH);
+ xlog_warn("Creating %s, set initial state 1",
+ _SM_STATE_PATH);
state = 1;
update = 1;
} else {
if (read(fd, &state, sizeof(state)) != sizeof(state)) {
- nsm_log(LOG_WARNING,
- "%s: bad file size, setting state = 1",
+ xlog_warn("%s: bad file size, setting state = 1",
_SM_STATE_PATH);
state = 1;
update = 1;
snprintf(newfile, sizeof(newfile),
"%s.new", _SM_STATE_PATH);
if ((fd = open(newfile, O_CREAT|O_WRONLY, 0644)) < 0) {
- nsm_log(LOG_WARNING, "Cannot create %s: %m", newfile);
+ xlog(L_ERROR, "Cannot create %s: %m", newfile);
exit(1);
}
if (write(fd, &state, sizeof(state)) != sizeof(state)) {
- nsm_log(LOG_WARNING,
+ xlog(L_ERROR,
"Failed to write state to %s", newfile);
exit(1);
}
close(fd);
if (rename(newfile, _SM_STATE_PATH) < 0) {
- nsm_log(LOG_WARNING,
+ xlog(L_ERROR,
"Cannot create %s: %m", _SM_STATE_PATH);
exit(1);
}
return state;
}
-/*
- * Address handling utilities
- */
-
-int
-addr_get_port(nsm_address *addr)
-{
- switch (((struct sockaddr *) addr)->sa_family) {
- case AF_INET:
- return ntohs(((struct sockaddr_in *) addr)->sin_port);
- case AF_INET6:
- return ntohs(((struct sockaddr_in6 *) addr)->sin6_port);
- }
- return 0;
-}
-
-static void
-addr_set_port(nsm_address *addr, int port)
-{
- switch (((struct sockaddr *) addr)->sa_family) {
- case AF_INET:
- ((struct sockaddr_in *) addr)->sin_port = htons(port);
- break;
- case AF_INET6:
- ((struct sockaddr_in6 *) addr)->sin6_port = htons(port);
- }
-}
-
-static struct addrinfo *
-host_lookup(int af, const char *name)
-{
- struct addrinfo hints, *ai;
-
- memset(&hints, 0, sizeof(hints));
- hints.ai_family = af;
- hints.ai_protocol = IPPROTO_UDP;
-
- if (getaddrinfo(name, NULL, &hints, &ai) != 0)
- return NULL;
-
- return ai;
-}
-
-/*
- * Log a message
- */
-void
-nsm_log(int fac, const char *fmt, ...)
-{
- va_list ap;
-
- if (fac == LOG_DEBUG && !opt_debug)
- return;
-
- va_start(ap, fmt);
- if (log_syslog)
- vsyslog(fac, fmt, ap);
- else {
- vfprintf(stderr, fmt, ap);
- fputs("\n", stderr);
- }
- va_end(ap);
-}
-
/*
* Record pid in /var/run/sm-notify.pid
* This file should remain until a reboot, even if the
fd = open("/var/run/sm-notify.pid", O_CREAT|O_EXCL|O_WRONLY, 0600);
if (fd < 0)
return 0;
- write(fd, pid, strlen(pid));
+ if (write(fd, pid, strlen(pid)) != strlen(pid)) {
+ xlog_warn("Writing to pid file failed: errno %d (%m)",
+ errno);
+ }
close(fd);
return 1;
}
}
if (st.st_uid == 0) {
- nsm_log(LOG_WARNING,
- "sm-notify running as root. chown %s to choose different user\n",
- _SM_DIR_PATH);
+ xlog_warn("Running as 'root'. "
+ "chown %s to choose different user", _SM_DIR_PATH);
return;
}
setgroups(0, NULL);
if (setgid(st.st_gid) == -1
|| setuid(st.st_uid) == -1) {
- nsm_log(LOG_ERR, "Fail to drop privileges");
+ xlog(L_ERROR, "Fail to drop privileges");
exit(1);
}
}
static void set_kernel_nsm_state(int state)
{
int fd;
+ const char *file = "/proc/sys/fs/nfs/nsm_local_state";
- fd = open("/proc/sys/fs/nfs/nsm_local_state",O_WRONLY);
+ fd = open(file ,O_WRONLY);
if (fd >= 0) {
char buf[20];
snprintf(buf, sizeof(buf), "%d", state);
- write(fd, buf, strlen(buf));
+ if (write(fd, buf, strlen(buf)) != strlen(buf)) {
+ xlog_warn("Writing to '%s' failed: errno %d (%m)",
+ file, errno);
+ }
close(fd);
}
}
projects / nfs-utils.git / blobdiff