net/sunrpc/xdr.c

138 	if (!buf->page_len)
140 	return (buf->page_base + buf->page_len + PAGE_SIZE - 1) >> PAGE_SHIFT;
187 	if (xdr->page_len) {
192 		remaining = xdr->page_len;
239 	xdr->page_len = len;
500 	if (pgbase >= buf->page_len) {
501 		xdr_buf_iov_zero(buf->tail, pgbase - buf->page_len, len);
504 	if (pgbase + len > buf->page_len) {
505 		xdr_buf_iov_zero(buf->tail, 0, pgbase + len - buf->page_len);
506 		len = buf->page_len - pgbase;
540 	if (pagelen > buf->page_len)
541 		pagelen = buf->page_len;
562 	unsigned int sum = head->iov_len + buf->page_len + tail->iov_len;
607 	if (base >= buf->page_len)
609 	if (len > buf->page_len - base)
610 		len = buf->page_len - base;
611 	if (to >= buf->page_len) {
612 		tato = to - buf->page_len;
617 	} else if (len + to >= buf->page_len) {
618 		pglen = buf->page_len - to;
645 	if (to >= buf->page_len + head->iov_len) {
646 		tato = to - buf->page_len - head->iov_len;
651 		if (pgto + pglen > buf->page_len) {
652 			talen = pgto + pglen - buf->page_len;
657 		if (pglen > buf->page_len) {
658 			talen = pglen - buf->page_len;
659 			pglen = buf->page_len;
695 	if (base >= buf->page_len) {
696 		xdr_buf_tail_shift_right(buf, base - buf->page_len, len, shift);
699 	if (base + len > buf->page_len)
700 		xdr_buf_tail_shift_right(buf, 0, base + len - buf->page_len,
734 	if (shift > buf->page_len + base) {
737 			head->iov_len + buf->page_len + base - shift;
740 		if (WARN_ONCE(shift > head->iov_len + buf->page_len + base,
753 		unsigned int pgto = buf->page_len + base - shift;
756 		if (pgto + pglen > buf->page_len)
757 			pglen = buf->page_len - pgto;
774 	if (base >= buf->page_len)
776 	if (len > buf->page_len - base)
777 		len = buf->page_len - base;
816 	if (base >= buf->page_len) {
817 		xdr_buf_tail_shift_left(buf, base - buf->page_len, len, shift);
822 	if (len <= buf->page_len)
824 	xdr_buf_tail_copy_left(buf, 0, len - buf->page_len, shift);
897 	WARN_ON_ONCE(len > buf->page_len);
900 	if (buf->page_len > buflen) {
901 		buf->buflen -= buf->page_len - buflen;
902 		buf->page_len = buflen;
904 	if (len >= buf->page_len)
906 	shift = buf->page_len - len;
909 	buf->page_len = len;
968 	int scratch_len = buf->buflen - buf->page_len - buf->tail[0].iov_len;
1059 		xdr->buf->page_len += frag1bytes;
1084 	xdr->buf->page_len += frag2bytes;
1117 		xdr->buf->page_len += nbytes;
1152 		thislen = xdr->buf->page_len % PAGE_SIZE;
1209 	fraglen = min_t(int, buf->len - len, buf->page_len);
1210 	buf->page_len -= fraglen;
1213 	new = buf->page_base + buf->page_len;
1217 	if (buf->page_len) {
1298 	buf->page_len = len;
1337 	xdr_stream_set_pos(xdr, base + buf->page_len + buf->head->iov_len);
1358 	maxlen = xdr->buf->page_len;
1394 		base -= xdr->buf->page_len;
1405 	if (newbase < xdr->buf->page_len)
1457 	buf->page_len =  len;
1552 		xdr_set_page(xdr, 0, buf->page_len);
1570 	if (buf->page_len <= len)
1571 		len = buf->page_len;
1626 	if (len < buf->page_len) {
1627 		base = buf->page_len - len;
1631 					 buf->page_len, remaining);
1632 		if (len > buf->page_len)
1633 			xdr_buf_try_expand(buf, len - buf->page_len);
1667 	buf->page_len = 0;
1702 	if (base < buf->page_len) {
1703 		subbuf->page_len = min(buf->page_len - base, len);
1707 		len -= subbuf->page_len;
1710 		base -= buf->page_len;
1713 		subbuf->page_len = 0;
1827 	if (buf.page_len > 0)
1828 		xdr_buf_pages_zero(&buf, 0, buf.page_len);
1858 	if (buf->page_len) {
1859 		cur = min_t(unsigned int, buf->page_len, trim);
1860 		buf->page_len -= cur;
1885 	this_len = min_t(unsigned int, len, subbuf->page_len);
1917 	this_len = min_t(unsigned int, len, subbuf->page_len);
2022 	if (todo && base < buf->page_len) {
2025 		avail_here = min(todo, buf->page_len - base);
2117 		base = buf->page_len;  /* align to start of tail */
2121 	base -= buf->page_len;
2169 	    buf->head->iov_len + buf->page_len + buf->tail->iov_len)
2181 	unsigned int page_len, thislen, page_offset;
2202 	if (offset >= buf->page_len) {
2203 		offset -= buf->page_len;
2205 		page_len = buf->page_len - offset;
2206 		if (page_len > len)
2207 			page_len = len;
2208 		len -= page_len;
2213 			if (thislen > page_len)
2214 				thislen = page_len;
2219 			page_len -= thislen;
2223 		} while (page_len != 0);