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>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index d2c4b59..3ca4497 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -5098,7 +5098,6 @@ static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
        if (mxresp_sz == 0)
                mxresp_sz = NFS_MAX_FILE_IO_SIZE;
        /* Fore channel attributes */
-       args->fc_attrs.headerpadsz = 0;
        args->fc_attrs.max_rqst_sz = mxrqst_sz;
        args->fc_attrs.max_resp_sz = mxresp_sz;
        args->fc_attrs.max_ops = NFS4_MAX_OPS;
@@ -5111,7 +5110,6 @@ static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
                args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
 
        /* Back channel attributes */
-       args->bc_attrs.headerpadsz = 0;
        args->bc_attrs.max_rqst_sz = PAGE_SIZE;
        args->bc_attrs.max_resp_sz = PAGE_SIZE;
        args->bc_attrs.max_resp_sz_cached = 0;
@@ -5131,8 +5129,6 @@ static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args
        struct nfs4_channel_attrs *sent = &args->fc_attrs;
        struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
 
-       if (rcvd->headerpadsz > sent->headerpadsz)
-               return -EINVAL;
        if (rcvd->max_resp_sz > sent->max_resp_sz)
                return -EINVAL;
        /*

diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index d869a5e..c4b7d6c 100644 (file)
--- 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++);

diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 5e8444a..00848d8 100644 (file)
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -158,7 +158,6 @@ struct nfs_seqid;
 
 /* nfs41 sessions channel attributes */
 struct nfs4_channel_attrs {
-       u32                     headerpadsz;
        u32                     max_rqst_sz;
        u32                     max_resp_sz;
        u32                     max_resp_sz_cached;