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: Trond Myklebust <Trond.Myklebust@netapp.com>
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@ -218,6 +218,7 @@ extern void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32
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extern __be32 *xdr_reserve_space(struct xdr_stream *xdr, size_t nbytes);
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extern void xdr_write_pages(struct xdr_stream *xdr, struct page **pages,
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unsigned int base, unsigned int len);
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extern unsigned int xdr_stream_pos(const struct xdr_stream *xdr);
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extern void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p);
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extern void xdr_init_decode_pages(struct xdr_stream *xdr, struct xdr_buf *buf,
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struct page **pages, unsigned int len);
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@ -454,6 +454,16 @@ xdr_shift_buf(struct xdr_buf *buf, size_t len)
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}
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EXPORT_SYMBOL_GPL(xdr_shift_buf);
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/**
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* xdr_stream_pos - Return the current offset from the start of the xdr_stream
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* @xdr: pointer to struct xdr_stream
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*/
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unsigned int xdr_stream_pos(const struct xdr_stream *xdr)
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{
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return (unsigned int)(XDR_QUADLEN(xdr->buf->len) - xdr->nwords) << 2;
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}
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EXPORT_SYMBOL_GPL(xdr_stream_pos);
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/**
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* xdr_init_encode - Initialize a struct xdr_stream for sending data.
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* @xdr: pointer to xdr_stream struct
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