mount.nfs - require statd to be running to mount without nolocks

If we are mounting nfsv2 or nfsv3 and statd isn't running and we
cannot start statd, then fail the mount request.

Also use an RPC ping to check on statd.

Signed-off-by: Neil Brown <neilb@suse.de>

diff --git a/utils/mount/mount.c b/utils/mount/mount.c
index 4698d85fd98f6f9cd30c00f8644dff26ceb41082..52b0d67d208281b5bbc75b3a1d55ef2a6854698e 100644 (file)
--- a/utils/mount/mount.c
+++ b/utils/mount/mount.c
@@ -302,7 +302,33 @@ static void mount_error(char *node)
        }
 }
 
-static void start_statd()
+extern u_short getport(
+       struct sockaddr_in *saddr,
+       u_long prog,
+       u_long vers,
+       u_int prot);
+
+static int probe_statd()
+{
+       struct sockaddr_in addr;
+       u_short port;
+
+       memset(&addr, 0, sizeof(addr));
+       addr.sin_family = AF_INET;
+       addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+       port = getport(&addr, 100024, 1, IPPROTO_UDP);
+
+       if (port == 0)
+               return 0;
+       addr.sin_port = htons(port);
+
+       if (clnt_ping(&addr, 100024, 1, IPPROTO_UDP, NULL) <= 0)
+               return 0;
+
+       return 1;
+}
+
+static int start_statd()
 {
        /* If /var/run/rpc.statd.pid exists and is non-empty,
         * assume statd already running.
@@ -311,15 +337,19 @@ static void start_statd()
         * else run that file (typically a shell script)
         */
        struct stat stb;
-       if (stat("/var/run/rpc.statd.pid", &stb) == 0 &&
-           stb.st_size > 0)
-               return;
+
+       if (probe_statd())
+               return 1;
 #ifdef START_STATD
        if (stat(START_STATD, &stb) ==0 &&
            S_ISREG(stb.st_mode) &&
-           (stb.st_mode & S_IXUSR))
+           (stb.st_mode & S_IXUSR)) {
                system(START_STATD);
+               if (probe_statd())
+                       return 1;
+       }
 #endif
+       return 0;
 }
 
 int main(int argc, char *argv[])
@@ -485,8 +515,17 @@ int main(int argc, char *argv[])
                mnt_err = nfsmount(spec, mount_point, &flags,
                                   &extra_opts, &mount_opts,
                                   0, &need_statd);
-               if (!mnt_err && !fake && need_statd)
-                       start_statd();
+               if (!mnt_err && !fake && need_statd) {
+                       if (!start_statd()) {
+                               fprintf(stderr,
+                                       "%s: rpc.statd is not running but is "
+                                       "required for remote locking\n"
+                                       "   Either use \"-o nolocks\" to keep "
+                                       "locks local, or start statd.\n",
+                                       progname);
+                               exit(1);
+                       }
+               }
        }
 
        if (mnt_err)

diff --git a/utils/mount/nfsmount.c b/utils/mount/nfsmount.c
index 4049e662ca2d81c16f6049b27b16e058a51fc682..776ef6440a78acf67effed85e0a3789a0dccdf6a 100644 (file)
--- a/utils/mount/nfsmount.c
+++ b/utils/mount/nfsmount.c
@@ -293,14 +293,14 @@ int nfs_gethostbyname(const char *hostname, struct sockaddr_in *saddr)
  * instead of reserve ports since reserve ports
  * are not needed for pmap requests.
  */
-static u_short
+u_short
 getport(
        struct sockaddr_in *saddr, 
        u_long prog, 
        u_long vers, 
        u_int prot)
 {
-       u_short port;
+       u_short port = 0;
        int    socket;
        CLIENT *clnt = NULL;
        struct pmap parms;