From: \"Talpey, Thomas\" Date: Mon, 10 Sep 2007 13:44:58 -0400 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 Signed-off-by: Trond Myklebust --- fs/nfs/nfs2xdr.c | 2 ++ fs/nfs/nfs3xdr.c | 2 ++ fs/nfs/nfs4xdr.c | 2 ++ include/linux/sunrpc/xdr.h | 5 ++++- net/sunrpc/clnt.c | 1 + 5 files changed, 11 insertions(+), 1 deletions(-) diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c index 1c57094..668ab96 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 8a225fb..616d326 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 4dbbf44..5f353d4 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; diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h index c6b53d1..0751c94 100644 --- a/include/linux/sunrpc/xdr.h +++ b/include/linux/sunrpc/xdr.h @@ -70,7 +70,10 @@ struct xdr_buf { struct page ** pages; /* Array of contiguous pages */ unsigned int page_base, /* Start of page data */ - page_len; /* Length of page data */ + page_len, /* Length of page data */ + flags; /* Flags for data disposition */ +#define XDRBUF_READ 0x01 /* target of file read */ +#define XDRBUF_WRITE 0x02 /* source of file write */ unsigned int buflen, /* Total length of storage buffer */ len; /* Length of XDR encoded message */ diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index b19bacf..19c129e 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -874,6 +874,7 @@ rpc_xdr_buf_init(struct xdr_buf *buf, void *start, size_t len) buf->head[0].iov_len = len; buf->tail[0].iov_len = 0; buf->page_len = 0; + buf->flags = 0; buf->len = 0; buf->buflen = len; }