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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>
This commit is contained in:
\"Talpey, Thomas\ 2007-09-10 13:44:58 -04:00 committed by Trond Myklebust
parent 20c71f5e0f
commit 4f22ccc346
5 changed files with 11 additions and 1 deletions
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2
fs/nfs/nfs2xdr.c
View File

@ -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;
}

2
fs/nfs/nfs3xdr.c
View File

@ -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;
}

2
fs/nfs/nfs4xdr.c
View File

@ -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;

5
include/linux/sunrpc/xdr.h
View File

@ -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 */

1
net/sunrpc/clnt.c
View File

@ -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;
}