[Cluster-devel] cluster/gfs2/mount mount.gfs2.c util.h

[teigland@sourceware.org <teigland@sourceware.org>]

CVSROOT:	/cvs/cluster
Module name:	cluster
Changes by:	teigland at sourceware.org	2007-04-26 19:45:37

Modified files:
	gfs2/mount     : mount.gfs2.c util.h 

Log message:
	Check right away if the kernel has gfs/gfs2 support by looking in
	/sys/fs/.  This results in a user-friendly error message instead of
	something like "gfs_controld error 19".

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs2/mount/mount.gfs2.c.diff?cvsroot=cluster&r1=1.21&r2=1.22
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs2/mount/util.h.diff?cvsroot=cluster&r1=1.10&r2=1.11

--- cluster/gfs2/mount/mount.gfs2.c	2007/04/23 19:18:09	1.21
+++ cluster/gfs2/mount/mount.gfs2.c	2007/04/26 18:45:37	1.22
@@ -150,6 +150,25 @@
 		lock_dlm_leave(mo, sb, mnterr);
 }
 
+static void check_sys_fs(char *fsname)
+{
+	DIR *d;
+	struct dirent *de;
+
+	d = opendir("/sys/fs/");
+	if (!d)
+		die("no /sys/fs/ directory found: %d\n", errno);
+
+	while ((de = readdir(d))) {
+		if (strnlen(fsname, 5) != strnlen(de->d_name, 5))
+			continue;
+		if (!strncmp(fsname, de->d_name, strnlen(fsname, 5)))
+			return;
+	}
+	die("fs type \"%s\" not found in /sys/fs/, is the module loaded?\n",
+	    fsname);
+}
+
 int main(int argc, char **argv)
 {
 	struct mount_options mo;
@@ -172,6 +191,8 @@
 		exit(EXIT_SUCCESS);
 	}
 
+	check_sys_fs(fsname);
+
 	read_options(argc, argv, &mo);
 	check_options(&mo);
 	get_sb(mo.dev, &sb);
--- cluster/gfs2/mount/util.h	2006/10/13 20:01:19	1.10
+++ cluster/gfs2/mount/util.h	2007/04/26 18:45:37	1.11
@@ -20,6 +20,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <limits.h>
+#include <dirent.h>
 #include <errno.h>
 #include <signal.h>
 #include <sys/socket.h>