NFS: Update MNT and MNT3 reply decoding functions

Solder xdr_stream-based XDR decoding functions into the in-kernel mountd
client that are more careful about checking data types and watching for
buffer overflows.  The new MNT3 decoder includes support for auth-flavor
list decoding.

The "_sz" macro for MNT3 replies was missing the size of the file handle.
I've added this back, and included the size of the auth flavor array.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/nfs/nfsroot.c b/fs/nfs/nfsroot.c
index 24c1b93874c4..8c55b27c0de4 100644
--- a/fs/nfs/nfsroot.c
+++ b/fs/nfs/nfsroot.c
@@ -490,6 +490,7 @@ static int __init root_nfs_get_handle(void)
 {
         struct nfs_fh fh;
         struct sockaddr_in sin;
+        unsigned int auth_flav_len = 0;
         struct nfs_mount_request request = {
                 .sap            = (struct sockaddr *)&sin,
                 .salen          = sizeof(sin),
@@ -499,6 +500,7 @@ static int __init root_nfs_get_handle(void)
                 .protocol       = (nfs_data.flags & NFS_MOUNT_TCP) ?
                                         XPRT_TRANSPORT_TCP : XPRT_TRANSPORT_UDP,
                 .fh             = &fh,
+                .auth_flav_len  = &auth_flav_len,
         };
         int status;