Wrapfs: introduction and usage documentation

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Documentation: index entry for Wrapfs

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Wrapfs: Maintainers

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Wrapfs: main header file

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Wrapfs: superblock operations

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Wrapfs: inode operations

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Wrapfs: dentry operations

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Wrapfs: file operations

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Wrapfs: lookup-related functions

Main lookup function, nameidata helpers, and stacking-interposition
functions.

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Wrapfs: mount-time and module-linkage functions

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Wrapfs: vm_ops operations

Includes necessary address_space workaround ops.

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Wrapfs: main Makefile

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Wrapfs: Kconfig options

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Wrapfs: file system magic number

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Makefile: hook to compile Wrapfs

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Kconfig: hook to configure Wrapfs

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Wrapfs: don't mention kernel version in modload message

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Wrapfs: decrement nd_path on follow_link error

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Wrapfs: avoid an extra path_get/put pair in wrapfs_open

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Wrapfs: include slab.h

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>