138 	unsigned int buflen = head->iov_len;  in xdr_inline_pages()
140 	head->iov_len  = offset;  in xdr_inline_pages()
147 	tail->iov_len = buflen - offset;  in xdr_inline_pages()
325 	WARN_ON_ONCE(len > head->iov_len);  in xdr_shrink_bufhead()
326 	if (len > head->iov_len)  in xdr_shrink_bufhead()
327 		len = head->iov_len;  in xdr_shrink_bufhead()
330 	if (tail->iov_len != 0) {  in xdr_shrink_bufhead()
331 		if (tail->iov_len > len) {  in xdr_shrink_bufhead()
332 			copy = tail->iov_len - len;  in xdr_shrink_bufhead()
341 		if (offs >= tail->iov_len)  in xdr_shrink_bufhead()
343 		else if (copy > tail->iov_len - offs)  in xdr_shrink_bufhead()
344 			copy = tail->iov_len - offs;  in xdr_shrink_bufhead()
353 			if (copy > tail->iov_len)  in xdr_shrink_bufhead()
354 				copy = tail->iov_len;  in xdr_shrink_bufhead()
357 					head->iov_len - offs,  in xdr_shrink_bufhead()
372 				(char *)head->iov_base + head->iov_len - len,  in xdr_shrink_bufhead()
375 	head->iov_len -= len;  in xdr_shrink_bufhead()
402 	tailbuf_len = buf->buflen - buf->head->iov_len - buf->page_len;  in xdr_shrink_pagelen()
406 		unsigned int free_space = tailbuf_len - tail->iov_len;  in xdr_shrink_pagelen()
410 		tail->iov_len += free_space;  in xdr_shrink_pagelen()
413 		if (tail->iov_len > len) {  in xdr_shrink_pagelen()
415 			memmove(p, tail->iov_base, tail->iov_len - len);  in xdr_shrink_pagelen()
417 			copy = tail->iov_len;  in xdr_shrink_pagelen()
463 	int scratch_len = buf->buflen - buf->page_len - buf->tail[0].iov_len;  in xdr_init_encode()
469 	xdr->p = (__be32 *)((char *)iov->iov_base + iov->iov_len);  in xdr_init_encode()
471 	BUG_ON(iov->iov_len > scratch_len);  in xdr_init_encode()
480 		iov->iov_len += len;  in xdr_init_encode()
500 	int shift = xdr->scratch.iov_len;  in xdr_commit_encode()
508 	xdr->scratch.iov_len = 0;  in xdr_commit_encode()
526 		xdr->iov->iov_len += frag1bytes;  in xdr_get_next_encode_buffer()
539 	xdr->scratch.iov_len = frag1bytes;  in xdr_get_next_encode_buffer()
576 		xdr->iov->iov_len += nbytes;  in xdr_reserve_space()
617 	fraglen = min_t(int, buf->len - len, tail->iov_len);  in xdr_truncate_encode()
618 	tail->iov_len -= fraglen;  in xdr_truncate_encode()
620 	if (tail->iov_len) {  in xdr_truncate_encode()
621 		xdr->p = tail->iov_base + tail->iov_len;  in xdr_truncate_encode()
643 		xdr->end = head->iov_base + head->iov_len;  in xdr_truncate_encode()
647 	head->iov_len = len;  in xdr_truncate_encode()
649 	xdr->p = head->iov_base + head->iov_len;  in xdr_truncate_encode()
701 	iov->iov_len  = 0;  in xdr_write_pages()
709 		iov->iov_len  += pad;  in xdr_write_pages()
721 	if (len > iov->iov_len)  in xdr_set_iov()
722 		len = iov->iov_len;  in xdr_set_iov()
794 	xdr->scratch.iov_len = 0;  in xdr_init_decode()
796 	if (buf->head[0].iov_len != 0)  in xdr_init_decode()
853 	xdr->scratch.iov_len = buflen;  in xdr_set_scratch_buffer()
863 	if (nbytes > xdr->scratch.iov_len)  in xdr_copy_to_scratch()
913 	if (iov->iov_len > cur) {  in xdr_align_pages()
914 		xdr_shrink_bufhead(buf, iov->iov_len - cur);  in xdr_align_pages()
959 	if (end > iov->iov_len)  in xdr_read_pages()
960 		end = iov->iov_len;  in xdr_read_pages()
996 static struct kvec empty_iov = {.iov_base = NULL, .iov_len = 0};
1004 	buf->buflen = buf->len = iov->iov_len;  in xdr_buf_from_iov()
1027 	if (base < buf->head[0].iov_len) {  in xdr_buf_subsegment()
1029 		subbuf->head[0].iov_len = min_t(unsigned int, len,  in xdr_buf_subsegment()
1030 						buf->head[0].iov_len - base);  in xdr_buf_subsegment()
1031 		len -= subbuf->head[0].iov_len;  in xdr_buf_subsegment()
1034 		base -= buf->head[0].iov_len;  in xdr_buf_subsegment()
1035 		subbuf->head[0].iov_len = 0;  in xdr_buf_subsegment()
1050 	if (base < buf->tail[0].iov_len) {  in xdr_buf_subsegment()
1052 		subbuf->tail[0].iov_len = min_t(unsigned int, len,  in xdr_buf_subsegment()
1053 						buf->tail[0].iov_len - base);  in xdr_buf_subsegment()
1054 		len -= subbuf->tail[0].iov_len;  in xdr_buf_subsegment()
1057 		base -= buf->tail[0].iov_len;  in xdr_buf_subsegment()
1058 		subbuf->tail[0].iov_len = 0;  in xdr_buf_subsegment()
1082 	if (buf->tail[0].iov_len) {  in xdr_buf_trim()
1083 		cur = min_t(size_t, buf->tail[0].iov_len, trim);  in xdr_buf_trim()
1084 		buf->tail[0].iov_len -= cur;  in xdr_buf_trim()
1098 	if (buf->head[0].iov_len) {  in xdr_buf_trim()
1099 		cur = min_t(size_t, buf->head[0].iov_len, trim);  in xdr_buf_trim()
1100 		buf->head[0].iov_len -= cur;  in xdr_buf_trim()
1112 	this_len = min_t(unsigned int, len, subbuf->head[0].iov_len);  in __read_bytes_from_xdr_buf()
1121 	this_len = min_t(unsigned int, len, subbuf->tail[0].iov_len);  in __read_bytes_from_xdr_buf()
1143 	this_len = min_t(unsigned int, len, subbuf->head[0].iov_len);  in __write_bytes_to_xdr_buf()
1152 	this_len = min_t(unsigned int, len, subbuf->tail[0].iov_len);  in __write_bytes_to_xdr_buf()
1208 	if (subbuf.head[0].iov_len == obj->len)  in xdr_buf_read_netobj()
1212 	if (subbuf.tail[0].iov_len == obj->len)  in xdr_buf_read_netobj()
1222 	if (buf->tail[0].iov_len != 0)  in xdr_buf_read_netobj()
1223 		obj->data = buf->tail[0].iov_base + buf->tail[0].iov_len;  in xdr_buf_read_netobj()
1225 		obj->data = buf->head[0].iov_base + buf->head[0].iov_len;  in xdr_buf_read_netobj()
1259 	if (todo && base < buf->head->iov_len) {  in xdr_xcode_array2()
1262 				   buf->head->iov_len - base);  in xdr_xcode_array2()
1288 		base = buf->head->iov_len;  /* align to start of pages */  in xdr_xcode_array2()
1292 	base -= buf->head->iov_len;  in xdr_xcode_array2()
1442 	    buf->head->iov_len + buf->page_len + buf->tail->iov_len)  in xdr_encode_array2()
1459 	if (offset >= buf->head[0].iov_len) {  in xdr_process_buf()
1460 		offset -= buf->head[0].iov_len;  in xdr_process_buf()
1462 		thislen = buf->head[0].iov_len - offset;  in xdr_process_buf()
1501 	if (offset < buf->tail[0].iov_len) {  in xdr_process_buf()
1502 		thislen = buf->tail[0].iov_len - offset;  in xdr_process_buf()