[nfsv4] nfsv4.1 acl: Remove operation and ACE4_ADD_SUBDIRECTORY

["Aneesh Kumar K.V" <aneesh.kumar at linux.vnet.ibm.com>]

Hi,

I am looking for a clarification with respect to below section in nfsv4.1 RFC

6.2.1.3.2.  ACE4_DELETE vs. ACE4_DELETE_CHILD

The section states
"If the ACLs in question neither explicitly ALLOW nor DENY either of the above,
 and if MODE4_SVTX is not set on the parent, then the server SHOULD allow the
 removal if and only if ACE4_ADD_FILE is permitted. In the case where MODE4_SVTX
 is set, the server may also require the remover to own either the parent or the
 target, or may require the target to be writable."

I am wondering why we consider only ACE_ADD_FILE. Why not ACE4_ADD_SUBDIRECTORY also ?

-aneesh