tree f95fc349c245c4a0a3f6f8fcc5bf02f36a756134
parent aa510da5bfe1dfe263215fd0e05dac96e738a782
author Bryan Schumaker <bjschuma@netapp.com> 1285789309 -0400
committer Trond Myklebust <Trond.Myklebust@netapp.com> 1286491729 -0400

NFS: new idmapper

This patch creates a new idmapper system that uses the request-key function to
place a call into userspace to map user and group ids to names.  The old
idmapper was single threaded, which prevented more than one request from running
at a single time.  This means that a user would have to wait for an upcall to
finish before accessing a cached result.

The upcall result is stored on a keyring of type id_resolver.  See the file
Documentation/filesystems/nfs/idmapper.txt for instructions.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
[Trond: fix up the return value of nfs_idmap_lookup_name and clean up code]
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>