SUNRPC: add svcauth_map_clnt_to_svc_cred_local

Add new funtion svcauth_map_clnt_to_svc_cred_local which maps a
generic cred to a svc_cred suitable for use in nfsd.

This is needed by the localio code to map nfs client creds to nfs
server credentials.

Following from net/sunrpc/auth_unix.c:unx_marshal() it is clear that
->fsuid and ->fsgid must be used (rather than ->uid and ->gid).  In
addition, these uid and gid must be translated with from_kuid_munged()
so local client uses correct uid and gid when acting as local server.

Jeff Layton noted:
  This is where the magic happens. Since we're working in
  kuid_t/kgid_t, we don't need to worry about further idmapping.

Suggested-by: NeilBrown <[email protected]> # to approximate unx_marshal()
Signed-off-by: Weston Andros Adamson <[email protected]>
Signed-off-by: Trond Myklebust <[email protected]>
Co-developed-by: Mike Snitzer <[email protected]>
Signed-off-by: Mike Snitzer <[email protected]>
Reviewed-by: Chuck Lever <[email protected]>
Reviewed-by: Jeff Layton <[email protected]>
Reviewed-by: NeilBrown <[email protected]>
Signed-off-by: Anna Schumaker <[email protected]>

0 files changed, 0 insertions, 0 deletions