From 79a7d3e4ccb41f63c01ba641757c2e87e71676ee Mon Sep 17 00:00:00 2001
From: daniceexi <daniceexi@8638fb3e-16cb-4fca-ae20-7b5d299a9bcd>
Date: Tue, 14 May 2013 02:20:47 +0000
Subject: [PATCH] add comment for why the /etc/mtab needs special case

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/branches/2.8@16278 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
---
 xCAT-server/lib/xcat/plugins/statelite.pm | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/xCAT-server/lib/xcat/plugins/statelite.pm b/xCAT-server/lib/xcat/plugins/statelite.pm
index 7aae70149..99aebdf7c 100644
--- a/xCAT-server/lib/xcat/plugins/statelite.pm
+++ b/xCAT-server/lib/xcat/plugins/statelite.pm
@@ -318,9 +318,12 @@ sub process_request {
                     }
                 } else {
                     if ($tmpc[0] =~ m/link/) {
+                        # The /etc/mtab is a specific file which can only be handled by link option.
+                        # It need to be existed in rootimage and during the runing of statelite, 
+                        # and after running of statelite, it need to be linked to /proc/mount
                         if ($tmpc[1] != "/etc/mtab") {
-                        $callback->({error=>[qq{Based on the option of $f, $fc should not use "link"-based options}], errorcode=>[1]});
-                        return;
+                            $callback->({error=>[qq{Based on the option of $f, $fc should not use "link"-based options}], errorcode=>[1]});
+                            return;
                         }
                     }
                 }
@@ -769,6 +772,9 @@ sub liteItem {
         # 1.  copy original contents if they exist to .default directory
         # 2.  remove file
         # 3.  create symbolic link to .statelite
+
+        # the /etc/mtab should be handled every time even the parent /etc/ has been handled.
+        # if adding /etc/ to litefile, only tmpfs should be used. 
         if ($entry[1] == "/etc/mtab") {
             $isChild = 0;
         }