NFS: pnfs IPv6 support

Handle ipv6 remote addresses from GETDEVICEINFO

 - supports netid "tcp" for ipv4 and "tcp6" for ipv6 as rfc 5665 specifies
 - added ds_remotestr to avoid having to handle different AFs in every dprintk
 - tested against pynfs 4.1 server, submitting ipv6 support patch to pynfs
 - tested with IPv6 disabled, it compiles cleanly and relies on rpc_pton to
   refuse to accept IPv6 addresses

Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/fs/nfs/nfs4filelayout.h b/fs/nfs/nfs4filelayout.h
index cebe01e3795e..6c6a817710e5 100644
--- a/fs/nfs/nfs4filelayout.h
+++ b/fs/nfs/nfs4filelayout.h
@@ -49,8 +49,9 @@ enum stripetype4 {
 /* Individual ip address */
 struct nfs4_pnfs_ds {
         struct list_head        ds_node;  /* nfs4_pnfs_dev_hlist dev_dslist */
-        u32                     ds_ip_addr;
-        u32                     ds_port;
+        struct sockaddr_storage ds_addr;
+        size_t                  ds_addrlen;
+        char                    *ds_remotestr;  /* human readable addr+port */
         struct nfs_client       *ds_clp;
         atomic_t                ds_count;
 };