pnfs: GETDEVICELIST

The block driver uses GETDEVICELIST

Signed-off-by: Andy Adamson <andros@netapp.com>
[pass struct nfs_server * to getdevicelist]
[get machince creds for getdevicelist]
[fix getdevicelist decode sizing]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Benny Halevy <bhalevy@tonian.com>
Signed-off-by: Jim Rees <rees@umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index feb3127..21f333e 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -235,6 +235,17 @@
 	gfp_t gfp_flags;
 };
 
+struct nfs4_getdevicelist_args {
+	const struct nfs_fh *fh;
+	u32 layoutclass;
+	struct nfs4_sequence_args seq_args;
+};
+
+struct nfs4_getdevicelist_res {
+	struct pnfs_devicelist *devlist;
+	struct nfs4_sequence_res seq_res;
+};
+
 struct nfs4_getdeviceinfo_args {
 	struct pnfs_device *pdev;
 	struct nfs4_sequence_args seq_args;