[PATCH] nfsd: POSIX<->NFSv4 acl translation for nfsd

[PATCH] nfsd: POSIX<->NFSv4 acl translation for nfsd

Code to translate between Linux's POSIX ACLs and NFSv4 ACLs.  Since NFSv4 ACLs
are fundamentally richer, we are able to translate any POSIX ACL to NFSv4, but
can only map NFSv4 ACLs that follow a certain format; see
http://www.citi.umich.edu/u/marius/draft-eriksen-nfsv4-acl-02.txt for details
of the mapping.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>