NFSv4.1: deprecate headerpadsz in CREATE_SESSION

We don't support header padding yet so better off ditching it

Reported-by: Sid Moore <learnmost@gmail.com>
Signed-off-by: Benny Halevy <benny@tonian.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index d869a5e5464b..c4b7d6c04948 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -1725,7 +1725,7 @@ static void encode_create_session(struct xdr_stream *xdr,
         *p++ = cpu_to_be32(args->flags);                        /*flags */
 
         /* Fore Channel */
-        *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
+        *p++ = cpu_to_be32(0);                          /* header padding size */
         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
@@ -1734,7 +1734,7 @@ static void encode_create_session(struct xdr_stream *xdr,
         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
 
         /* Back Channel */
-        *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
+        *p++ = cpu_to_be32(0);                          /* header padding size */
         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
@@ -4997,12 +4997,14 @@ static int decode_chan_attrs(struct xdr_stream *xdr,
                              struct nfs4_channel_attrs *attrs)
 {
         __be32 *p;
-        u32 nr_attrs;
+        u32 nr_attrs, val;
 
         p = xdr_inline_decode(xdr, 28);
         if (unlikely(!p))
                 goto out_overflow;
-        attrs->headerpadsz = be32_to_cpup(p++);
+        val = be32_to_cpup(p++);        /* headerpadsz */
+        if (val)
+                return -EINVAL;         /* no support for header padding yet */
         attrs->max_rqst_sz = be32_to_cpup(p++);
         attrs->max_resp_sz = be32_to_cpup(p++);
         attrs->max_resp_sz_cached = be32_to_cpup(p++);