[kexec-tools] dump_localfs error path fix

[Dave Young]

commit 3d470c4be28d82874568c7d1256659fe92d0ffa0
Author: Dave Young <dyoung at redhat.com>
Date:   Mon Jul 23 15:31:08 2012 +0800

    dump_localfs error path fix
    
    in dump_localfs, we should error out if fstab mount fails
    Also error out if mkdir fails.
    
    vivek: display error message for debugging purpose.
    
    Signed-off-by: Dave Young <dyoung at redhat.com>
    Acked-by: Vivek Goyal <vgoyal at redhat.com>

 dracut-kdump.sh |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/dracut-kdump.sh b/dracut-kdump.sh
index 2717820..8986cf0 100755
--- a/dracut-kdump.sh
+++ b/dracut-kdump.sh
@@ -85,11 +85,16 @@ dump_localfs()
 {
     local _dev=`to_dev_name $1`
     local _mp=`get_mp $_dev`
+
+    if [ -z "$_mp" ]; then
+        echo "kdump: error: Dump target $1 is not mounted."
+        return 1
+    fi
     if [ "$_mp" = "$NEWROOT/" ] || [ "$_mp" = "$NEWROOT" ]
     then
         mount -o remount,rw $_mp || return 1
     fi
-    mkdir -p $_mp/$KDUMP_PATH/$DATEDIR
+    mkdir -p $_mp/$KDUMP_PATH/$DATEDIR || return 1
     $CORE_COLLECTOR /proc/vmcore $_mp/$KDUMP_PATH/$DATEDIR/vmcore || return 1
     umount $_mp || return 1
     return 0