fat (exportfs): fix dentry reconnection
commit7669e8fb09da47dd45c07a51394f01031ea81da8
authorSteven J. Magnani <steve@digidescorp.com>
Fri, 5 Oct 2012 00:14:45 +0000 (4 17:14 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 5 Oct 2012 18:05:09 +0000 (6 03:05 +0900)
tree1112667a0606e27999a18b8dae574ae8ad01a151
parent21b6633d516c4f5d03ec02ede6374e320191003f
fat (exportfs): fix dentry reconnection

Maintain an index of directory inodes by starting cluster, so that
fat_get_parent() can return the proper cached inode rather than inventing
one that cannot be traced back to the filesystem root.

Add a new msdos/vfat binary mount option "nfs" so that FAT filesystems
that are _not_ exported via NFS are not saddled with maintenance of an
index they will never use.

Finally, simplify NFS file handle generation and lookups.  An
ext2-congruent implementation is adequate for FAT needs.

Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/fat/dir.c
fs/fat/fat.h
fs/fat/inode.c
fs/fat/namei_msdos.c
fs/fat/namei_vfat.c
fs/fat/nfs.c