1579 int xdr_buf_subsegment(const struct xdr_buf *buf, struct xdr_buf *subbuf,  in xdr_buf_subsegment()  argument
1582 	subbuf->buflen = subbuf->len = len;  in xdr_buf_subsegment()
1584 		subbuf->head[0].iov_base = buf->head[0].iov_base + base;  in xdr_buf_subsegment()
1585 		subbuf->head[0].iov_len = min_t(unsigned int, len,  in xdr_buf_subsegment()
1587 		len -= subbuf->head[0].iov_len;  in xdr_buf_subsegment()
1591 		subbuf->head[0].iov_base = buf->head[0].iov_base;  in xdr_buf_subsegment()
1592 		subbuf->head[0].iov_len = 0;  in xdr_buf_subsegment()
1596 		subbuf->page_len = min(buf->page_len - base, len);  in xdr_buf_subsegment()
1598 		subbuf->page_base = base & ~PAGE_MASK;  in xdr_buf_subsegment()
1599 		subbuf->pages = &buf->pages[base >> PAGE_SHIFT];  in xdr_buf_subsegment()
1600 		len -= subbuf->page_len;  in xdr_buf_subsegment()
1604 		subbuf->pages = buf->pages;  in xdr_buf_subsegment()
1605 		subbuf->page_base = 0;  in xdr_buf_subsegment()
1606 		subbuf->page_len = 0;  in xdr_buf_subsegment()
1610 		subbuf->tail[0].iov_base = buf->tail[0].iov_base + base;  in xdr_buf_subsegment()
1611 		subbuf->tail[0].iov_len = min_t(unsigned int, len,  in xdr_buf_subsegment()
1613 		len -= subbuf->tail[0].iov_len;  in xdr_buf_subsegment()
1617 		subbuf->tail[0].iov_base = buf->tail[0].iov_base;  in xdr_buf_subsegment()
1618 		subbuf->tail[0].iov_len = 0;  in xdr_buf_subsegment()
1642 bool xdr_stream_subsegment(struct xdr_stream *xdr, struct xdr_buf *subbuf,  in xdr_stream_subsegment()  argument
1647 	if (xdr_buf_subsegment(xdr->buf, subbuf, xdr_stream_pos(xdr), nbytes))  in xdr_stream_subsegment()
1650 	if (subbuf->head[0].iov_len)  in xdr_stream_subsegment()
1651 		if (!__xdr_inline_decode(xdr, subbuf->head[0].iov_len))  in xdr_stream_subsegment()
1654 	remaining = subbuf->page_len;  in xdr_stream_subsegment()
1655 	offset = subbuf->page_base;  in xdr_stream_subsegment()
1713 static void __read_bytes_from_xdr_buf(const struct xdr_buf *subbuf,  in __read_bytes_from_xdr_buf()  argument
1718 	this_len = min_t(unsigned int, len, subbuf->head[0].iov_len);  in __read_bytes_from_xdr_buf()
1719 	memcpy(obj, subbuf->head[0].iov_base, this_len);  in __read_bytes_from_xdr_buf()
1722 	this_len = min_t(unsigned int, len, subbuf->page_len);  in __read_bytes_from_xdr_buf()
1723 	_copy_from_pages(obj, subbuf->pages, subbuf->page_base, this_len);  in __read_bytes_from_xdr_buf()
1726 	this_len = min_t(unsigned int, len, subbuf->tail[0].iov_len);  in __read_bytes_from_xdr_buf()
1727 	memcpy(obj, subbuf->tail[0].iov_base, this_len);  in __read_bytes_from_xdr_buf()
1734 	struct xdr_buf subbuf;  in read_bytes_from_xdr_buf()  local
1737 	status = xdr_buf_subsegment(buf, &subbuf, base, len);  in read_bytes_from_xdr_buf()
1740 	__read_bytes_from_xdr_buf(&subbuf, obj, len);  in read_bytes_from_xdr_buf()
1745 static void __write_bytes_to_xdr_buf(const struct xdr_buf *subbuf,  in __write_bytes_to_xdr_buf()  argument
1750 	this_len = min_t(unsigned int, len, subbuf->head[0].iov_len);  in __write_bytes_to_xdr_buf()
1751 	memcpy(subbuf->head[0].iov_base, obj, this_len);  in __write_bytes_to_xdr_buf()
1754 	this_len = min_t(unsigned int, len, subbuf->page_len);  in __write_bytes_to_xdr_buf()
1755 	_copy_to_pages(subbuf->pages, subbuf->page_base, obj, this_len);  in __write_bytes_to_xdr_buf()
1758 	this_len = min_t(unsigned int, len, subbuf->tail[0].iov_len);  in __write_bytes_to_xdr_buf()
1759 	memcpy(subbuf->tail[0].iov_base, obj, this_len);  in __write_bytes_to_xdr_buf()
1766 	struct xdr_buf subbuf;  in write_bytes_to_xdr_buf()  local
1769 	status = xdr_buf_subsegment(buf, &subbuf, base, len);  in write_bytes_to_xdr_buf()
1772 	__write_bytes_to_xdr_buf(&subbuf, obj, len);  in write_bytes_to_xdr_buf()