This is a simple patch which fix the issue that tunefs.ocfs2 online
resize can't handle symbolic link of a device file. For example, in
the LVM using scenario, '/dev/vg1/lv1' and '/dev/mapper/vg1-lv1' are
the same device, '/dev/vg1/lv1' is just a symbolic link to
'/dev/mapper/vg1-lv1'. But if we try to do online resize like
'tunefs.ocfs2 -S /dev/vg1/lv1', it fails.

Signed-off-by: Jiaju Zhang <jjzhang@suse.de>
---
 ocfs2_controld/mount.c |   20 +++++++++++++++++---
 1 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/ocfs2_controld/mount.c b/ocfs2_controld/mount.c
--- a/ocfs2_controld/mount.c
+++ b/ocfs2_controld/mount.c
@@ -260,13 +260,27 @@ static void add_service(struct mountgroup *mg, const char *device,
 			   const char *service, int ci, int fd)
 {
 	struct service *ms;
+	struct stat st1, st2;
 
-	log_debug("Adding service %s to device %s uuid %s",
+	log_debug("Adding service \"%s\" to device \"%s\" uuid \"%s\"",
 		  service, device, mg->mg_uuid);
 
-	if (strcmp(mg->mg_device, device)) {
+	if (stat(mg->mg_device, &st1)) {
+		fill_error(mg, errno, "Failed to stat device \"%s\": %s",
+			   mg->mg_device, strerror(errno));
+		return;
+	}
+
+	if (stat(device, &st2)) {
+		fill_error(mg, errno, "Failed to stat device \"%s\": %s",
+			   device, strerror(errno));
+		return;
+	}
+
+	if (st1.st_rdev != st2.st_rdev) {
 		fill_error(mg, EINVAL,
-			   "Trying to mount fs %s on device %s, but it is already mounted from device %s",
+			   "Trying to mount fs \"%s\" on device \"%s\", "
+			   "but it is already mounted from device \"%s\"",
 			   mg->mg_uuid, device, mg->mg_device);
 		return;
 	}