SUNRPC: Clean up xdr_set_iov()
Remove the 'p' argument, since that is only ever set by xdr_init_decode. Add sanity checking of 'p' inside xdr_init_decode itself. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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@ -554,13 +554,11 @@ void xdr_write_pages(struct xdr_stream *xdr, struct page **pages, unsigned int b
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EXPORT_SYMBOL_GPL(xdr_write_pages);
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static void xdr_set_iov(struct xdr_stream *xdr, struct kvec *iov,
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__be32 *p, unsigned int len)
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unsigned int len)
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{
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if (len > iov->iov_len)
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len = iov->iov_len;
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if (p == NULL)
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p = (__be32*)iov->iov_base;
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xdr->p = p;
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xdr->p = (__be32*)iov->iov_base;
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xdr->end = (__be32*)(iov->iov_base + len);
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xdr->iov = iov;
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xdr->page_ptr = NULL;
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@ -607,7 +605,7 @@ static void xdr_set_next_page(struct xdr_stream *xdr)
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newbase -= xdr->buf->page_base;
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if (xdr_set_page_base(xdr, newbase, PAGE_SIZE) < 0)
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xdr_set_iov(xdr, xdr->buf->tail, NULL, xdr->buf->len);
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xdr_set_iov(xdr, xdr->buf->tail, xdr->buf->len);
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}
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static bool xdr_set_next_buffer(struct xdr_stream *xdr)
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@ -616,7 +614,7 @@ static bool xdr_set_next_buffer(struct xdr_stream *xdr)
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xdr_set_next_page(xdr);
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else if (xdr->iov == xdr->buf->head) {
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if (xdr_set_page_base(xdr, 0, PAGE_SIZE) < 0)
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xdr_set_iov(xdr, xdr->buf->tail, NULL, xdr->buf->len);
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xdr_set_iov(xdr, xdr->buf->tail, xdr->buf->len);
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}
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return xdr->p != xdr->end;
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}
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@ -633,9 +631,11 @@ void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p)
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xdr->scratch.iov_base = NULL;
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xdr->scratch.iov_len = 0;
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if (buf->head[0].iov_len != 0)
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xdr_set_iov(xdr, buf->head, p, buf->len);
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xdr_set_iov(xdr, buf->head, buf->len);
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else if (buf->page_len != 0)
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xdr_set_page_base(xdr, 0, buf->len);
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if (p != NULL && p > xdr->p && xdr->end >= p)
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xdr->p = p;
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}
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EXPORT_SYMBOL_GPL(xdr_init_decode);
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