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Commit 4517d526 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

SUNRPC: Add the helper xdr_stream_pos 



Add a helper to report the current offset from the start of the
xdr_stream.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 64bd577e

include/linux/sunrpc/xdr.h

+1 −0
Original line number Diff line number Diff line
@@ -218,6 +218,7 @@ extern void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 
extern __be32 *xdr_reserve_space(struct xdr_stream *xdr, size_t nbytes);

extern void xdr_write_pages(struct xdr_stream *xdr, struct page **pages,

		unsigned int base, unsigned int len);

extern unsigned int xdr_stream_pos(const struct xdr_stream *xdr);

extern void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p);

extern void xdr_init_decode_pages(struct xdr_stream *xdr, struct xdr_buf *buf,

		struct page **pages, unsigned int len);

net/sunrpc/xdr.c

+10 −0
Original line number Diff line number Diff line
@@ -454,6 +454,16 @@ xdr_shift_buf(struct xdr_buf *buf, size_t len) 
}

EXPORT_SYMBOL_GPL(xdr_shift_buf);



/**

 * xdr_stream_pos - Return the current offset from the start of the xdr_stream

 * @xdr: pointer to struct xdr_stream

 */

unsigned int xdr_stream_pos(const struct xdr_stream *xdr)

{

	return (unsigned int)(XDR_QUADLEN(xdr->buf->len) - xdr->nwords) << 2;

}

EXPORT_SYMBOL_GPL(xdr_stream_pos);



/**

 * xdr_init_encode - Initialize a struct xdr_stream for sending data.

 * @xdr: pointer to xdr_stream struct