183 	unsigned int buflen = head->iov_len;  in xdr_inline_pages()
185 	head->iov_len  = offset;  in xdr_inline_pages()
192 	tail->iov_len = buflen - offset;  in xdr_inline_pages()
194 		tail->iov_len -= sizeof(__be32);  in xdr_inline_pages()
374 	WARN_ON_ONCE(len > head->iov_len);  in xdr_shrink_bufhead()
375 	if (len > head->iov_len)  in xdr_shrink_bufhead()
376 		len = head->iov_len;  in xdr_shrink_bufhead()
379 	if (tail->iov_len != 0) {  in xdr_shrink_bufhead()
380 		if (tail->iov_len > len) {  in xdr_shrink_bufhead()
381 			copy = tail->iov_len - len;  in xdr_shrink_bufhead()
391 		if (offs >= tail->iov_len)  in xdr_shrink_bufhead()
393 		else if (copy > tail->iov_len - offs)  in xdr_shrink_bufhead()
394 			copy = tail->iov_len - offs;  in xdr_shrink_bufhead()
405 			if (copy > tail->iov_len)  in xdr_shrink_bufhead()
406 				copy = tail->iov_len;  in xdr_shrink_bufhead()
409 					head->iov_len - offs,  in xdr_shrink_bufhead()
425 				(char *)head->iov_base + head->iov_len - len,  in xdr_shrink_bufhead()
429 	head->iov_len -= len;  in xdr_shrink_bufhead()
460 	tailbuf_len = buf->buflen - buf->head->iov_len - buf->page_len;  in xdr_shrink_pagelen()
464 		unsigned int free_space = tailbuf_len - tail->iov_len;  in xdr_shrink_pagelen()
468 		tail->iov_len += free_space;  in xdr_shrink_pagelen()
471 		if (tail->iov_len > len) {  in xdr_shrink_pagelen()
473 			memmove(p, tail->iov_base, tail->iov_len - len);  in xdr_shrink_pagelen()
474 			result += tail->iov_len - len;  in xdr_shrink_pagelen()
476 			copy = tail->iov_len;  in xdr_shrink_pagelen()
527 	int scratch_len = buf->buflen - buf->page_len - buf->tail[0].iov_len;  in xdr_init_encode()
533 	xdr->p = (__be32 *)((char *)iov->iov_base + iov->iov_len);  in xdr_init_encode()
535 	BUG_ON(iov->iov_len > scratch_len);  in xdr_init_encode()
544 		iov->iov_len += len;  in xdr_init_encode()
565 	int shift = xdr->scratch.iov_len;  in xdr_commit_encode()
573 	xdr->scratch.iov_len = 0;  in xdr_commit_encode()
591 		xdr->iov->iov_len += frag1bytes;  in xdr_get_next_encode_buffer()
604 	xdr->scratch.iov_len = frag1bytes;  in xdr_get_next_encode_buffer()
644 		xdr->iov->iov_len += nbytes;  in xdr_reserve_space()
685 	fraglen = min_t(int, buf->len - len, tail->iov_len);  in xdr_truncate_encode()
686 	tail->iov_len -= fraglen;  in xdr_truncate_encode()
688 	if (tail->iov_len) {  in xdr_truncate_encode()
689 		xdr->p = tail->iov_base + tail->iov_len;  in xdr_truncate_encode()
711 		xdr->end = head->iov_base + head->iov_len;  in xdr_truncate_encode()
714 	head->iov_len = len;  in xdr_truncate_encode()
716 	xdr->p = head->iov_base + head->iov_len;  in xdr_truncate_encode()
768 	iov->iov_len  = 0;  in xdr_write_pages()
776 		iov->iov_len  += pad;  in xdr_write_pages()
788 	if (len > iov->iov_len)  in xdr_set_iov()
789 		len = iov->iov_len;  in xdr_set_iov()
863 	xdr->scratch.iov_len = 0;  in xdr_init_decode()
865 	if (buf->head[0].iov_len != 0)  in xdr_init_decode()
925 	xdr->scratch.iov_len = buflen;  in xdr_set_scratch_buffer()
935 	if (nbytes > xdr->scratch.iov_len)  in xdr_copy_to_scratch()
996 	if (iov->iov_len > cur) {  in xdr_align_pages()
997 		offset = iov->iov_len - cur;  in xdr_align_pages()
1046 	if (end > iov->iov_len)  in xdr_read_pages()
1047 		end = iov->iov_len;  in xdr_read_pages()
1083 static struct kvec empty_iov = {.iov_base = NULL, .iov_len = 0};
1091 	buf->buflen = buf->len = iov->iov_len;  in xdr_buf_from_iov()
1114 	if (base < buf->head[0].iov_len) {  in xdr_buf_subsegment()
1116 		subbuf->head[0].iov_len = min_t(unsigned int, len,  in xdr_buf_subsegment()
1117 						buf->head[0].iov_len - base);  in xdr_buf_subsegment()
1118 		len -= subbuf->head[0].iov_len;  in xdr_buf_subsegment()
1121 		base -= buf->head[0].iov_len;  in xdr_buf_subsegment()
1122 		subbuf->head[0].iov_len = 0;  in xdr_buf_subsegment()
1137 	if (base < buf->tail[0].iov_len) {  in xdr_buf_subsegment()
1139 		subbuf->tail[0].iov_len = min_t(unsigned int, len,  in xdr_buf_subsegment()
1140 						buf->tail[0].iov_len - base);  in xdr_buf_subsegment()
1141 		len -= subbuf->tail[0].iov_len;  in xdr_buf_subsegment()
1144 		base -= buf->tail[0].iov_len;  in xdr_buf_subsegment()
1145 		subbuf->tail[0].iov_len = 0;  in xdr_buf_subsegment()
1158 	this_len = min_t(unsigned int, len, subbuf->head[0].iov_len);  in __read_bytes_from_xdr_buf()
1167 	this_len = min_t(unsigned int, len, subbuf->tail[0].iov_len);  in __read_bytes_from_xdr_buf()
1189 	this_len = min_t(unsigned int, len, subbuf->head[0].iov_len);  in __write_bytes_to_xdr_buf()
1198 	this_len = min_t(unsigned int, len, subbuf->tail[0].iov_len);  in __write_bytes_to_xdr_buf()
1261 	boundary = buf->head[0].iov_len;  in xdr_buf_read_mic()
1275 	if (subbuf.head[0].iov_len == mic->len)  in xdr_buf_read_mic()
1279 	if (subbuf.tail[0].iov_len == mic->len)  in xdr_buf_read_mic()
1285 	if (buf->tail[0].iov_len != 0)  in xdr_buf_read_mic()
1286 		mic->data = buf->tail[0].iov_base + buf->tail[0].iov_len;  in xdr_buf_read_mic()
1288 		mic->data = buf->head[0].iov_base + buf->head[0].iov_len;  in xdr_buf_read_mic()
1322 	if (todo && base < buf->head->iov_len) {  in xdr_xcode_array2()
1325 				   buf->head->iov_len - base);  in xdr_xcode_array2()
1351 		base = buf->head->iov_len;  /* align to start of pages */  in xdr_xcode_array2()
1355 	base -= buf->head->iov_len;  in xdr_xcode_array2()
1505 	    buf->head->iov_len + buf->page_len + buf->tail->iov_len)  in xdr_encode_array2()
1522 	if (offset >= buf->head[0].iov_len) {  in xdr_process_buf()
1523 		offset -= buf->head[0].iov_len;  in xdr_process_buf()
1525 		thislen = buf->head[0].iov_len - offset;  in xdr_process_buf()
1564 	if (offset < buf->tail[0].iov_len) {  in xdr_process_buf()
1565 		thislen = buf->tail[0].iov_len - offset;  in xdr_process_buf()