tree 0fc9da9692a1e63cff03053fc87cc807fab5e266
parent 96c61cbd0f30496bfa57ed80f7131a57aea3e4de
author Trond Myklebust <Trond.Myklebust@netapp.com> 1250719947 -0400
committer Trond Myklebust <Trond.Myklebust@netapp.com> 1250720535 -0400

NFS: Add a dns resolver for use with NFSv4 referrals and migration

The NFSv4 and NFSv4.1 protocols both allow for the redirection of a client
from one server to another in order to support filesystem migration and
replication. For full protocol support, we need to add the ability to
convert a DNS host name into an IP address that we can feed to the RPC
client.

We'll reuse the sunrpc cache, now that it has been converted to work with
rpc_pipefs.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>