feature: wdfp kernel module

hijack the sys_write syscall and provide a /proc interface to manipulate
the config in kernel.

this module acts as following:
1) accept configuration data from /proc interface
2) each write in userspace will be hijacked
3) get full path of the file in write
4) compare the full path with the protection path, and decide if to
deny or pass the sys call request.

This module does not support:
1) any types of "truncate" to a file is not controlled by wdfp
2) mmap syscall is not intercepted by wdfp

Signed-off-by: paulyang <y_y@neusoft.com>
Merge branch 'wd-kernel'