SUNRPC: mark bulk read/write data in xdrbuf

Adds a flag word to the xdrbuf struct which indicates any bulk
disposition of the data. This enables RPC transport providers to
marshal it efficiently/appropriately, and may enable other
optimizations.

Signed-off-by: Tom Talpey <tmt@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

3 files changed, 6 insertions, 0 deletions

diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c
index 1c570948fc16..668ab96c7b59 100644
--- a/fs/nfs/nfs2xdr.c
+++ b/fs/nfs/nfs2xdr.c
@@ -251,6 +251,7 @@ nfs_xdr_readargs(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readres_sz) << 2;
         xdr_inline_pages(&req->rq_rcv_buf, replen,
                          args->pages, args->pgbase, count);
+        req->rq_rcv_buf.flags |= XDRBUF_READ;
         return 0;
 }
 
@@ -313,6 +314,7 @@ nfs_xdr_writeargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
 
         /* Copy the page array */
         xdr_encode_pages(sndbuf, args->pages, args->pgbase, count);
+        sndbuf->flags |= XDRBUF_WRITE;
         return 0;
 }
 
diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c
index 8a225fbe9ee2..616d3267b7e7 100644
--- a/fs/nfs/nfs3xdr.c
+++ b/fs/nfs/nfs3xdr.c
@@ -346,6 +346,7 @@ nfs3_xdr_readargs(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readres_sz) << 2;
         xdr_inline_pages(&req->rq_rcv_buf, replen,
                          args->pages, args->pgbase, count);
+        req->rq_rcv_buf.flags |= XDRBUF_READ;
         return 0;
 }
 
@@ -367,6 +368,7 @@ nfs3_xdr_writeargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
 
         /* Copy the page array */
         xdr_encode_pages(sndbuf, args->pages, args->pgbase, count);
+        sndbuf->flags |= XDRBUF_WRITE;
         return 0;
 }
 
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 4dbbf44727ea..5f353d4686b6 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -1856,6 +1856,7 @@ static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readarg
         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
         xdr_inline_pages(&req->rq_rcv_buf, replen,
                          args->pages, args->pgbase, args->count);
+        req->rq_rcv_buf.flags |= XDRBUF_READ;
 out:
         return status;
 }
@@ -1932,6 +1933,7 @@ static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writea
         status = encode_write(&xdr, args);
         if (status)
                 goto out;
+        req->rq_snd_buf.flags |= XDRBUF_WRITE;
         status = encode_getfattr(&xdr, args->bitmask);
 out:
         return status;