Quota format vfsv0 and vfsv1 support

modulename: quota_v2.ko

configname: CONFIG_QFMT_V2

Linux Kernel Configuration
└─>File systems
└─>Quota format vfsv0 and vfsv1 support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This config option enables kernel support for vfsv0 and vfsv1 quota
formats. Both these formats support 32-bit UIDs/GIDs and vfsv1 format
also supports 64-bit inode and block quota limits. If you need this
functionality say Y here.

source code: