184 	struct kvec *tail = xdr->tail;  in xdr_inline_pages()  local
194 	tail->iov_base = buf + offset;  in xdr_inline_pages()
195 	tail->iov_len = buflen - offset;  in xdr_inline_pages()
197 		tail->iov_len -= sizeof(__be32);  in xdr_inline_pages()
272 	struct kvec *tail = buf->tail;  in _shift_data_left_tail()  local
274 	if (len > tail->iov_len)  in _shift_data_left_tail()
275 		len = tail->iov_len;  in _shift_data_left_tail()
279 		       (char *)tail->iov_base,  in _shift_data_left_tail()
281 	tail->iov_len -= len;  in _shift_data_left_tail()
283 	if (tail->iov_len > 0)  in _shift_data_left_tail()
284 		memmove((char *)tail->iov_base,  in _shift_data_left_tail()
285 				tail->iov_base + len,  in _shift_data_left_tail()
286 				tail->iov_len);  in _shift_data_left_tail()
357 	struct kvec *tail = buf->tail;  in _shift_data_right_tail()  local
364 	/* Shift the tail first */  in _shift_data_right_tail()
366 		unsigned int free_space = tailbuf_len - tail->iov_len;  in _shift_data_right_tail()
373 		tail->iov_len += free_space;  in _shift_data_right_tail()
376 		if (tail->iov_len > len) {  in _shift_data_right_tail()
377 			char *p = (char *)tail->iov_base + len;  in _shift_data_right_tail()
378 			memmove(p, tail->iov_base, tail->iov_len - free_space);  in _shift_data_right_tail()
379 			result += tail->iov_len - free_space;  in _shift_data_right_tail()
381 			copy = tail->iov_len;  in _shift_data_right_tail()
383 		/* Copy from the inlined pages into the tail */  in _shift_data_right_tail()
384 		_copy_from_pages((char *)tail->iov_base,  in _shift_data_right_tail()
517  * moved into the inlined pages and/or the tail.
522 	struct kvec *head, *tail;  in xdr_shrink_bufhead()  local
528 	tail = buf->tail;  in xdr_shrink_bufhead()
535 	/* Shift the tail first */  in xdr_shrink_bufhead()
536 	if (tail->iov_len != 0) {  in xdr_shrink_bufhead()
537 		if (tail->iov_len > len) {  in xdr_shrink_bufhead()
538 			copy = tail->iov_len - len;  in xdr_shrink_bufhead()
539 			memmove((char *)tail->iov_base + len,  in xdr_shrink_bufhead()
540 					tail->iov_base, copy);  in xdr_shrink_bufhead()
543 		/* Copy from the inlined pages into the tail */  in xdr_shrink_bufhead()
548 		if (offs >= tail->iov_len)  in xdr_shrink_bufhead()
550 		else if (copy > tail->iov_len - offs)  in xdr_shrink_bufhead()
551 			copy = tail->iov_len - offs;  in xdr_shrink_bufhead()
553 			_copy_from_pages((char *)tail->iov_base + offs,  in xdr_shrink_bufhead()
559 		/* Do we also need to copy data from the head into the tail ? */  in xdr_shrink_bufhead()
562 			if (copy > tail->iov_len)  in xdr_shrink_bufhead()
563 				copy = tail->iov_len;  in xdr_shrink_bufhead()
564 			memcpy(tail->iov_base,  in xdr_shrink_bufhead()
600  * The extra data is not lost, but is instead moved into buf->tail.
670 	int scratch_len = buf->buflen - buf->page_len - buf->tail[0].iov_len;  in xdr_init_encode()
851  * head, tail, and page lengths are adjusted to correspond.
860  * simple case of truncating from one position in the tail to another.
867 	struct kvec *tail = buf->tail;  in xdr_truncate_encode()  local
877 	fraglen = min_t(int, buf->len - len, tail->iov_len);  in xdr_truncate_encode()
878 	tail->iov_len -= fraglen;  in xdr_truncate_encode()
880 	if (tail->iov_len) {  in xdr_truncate_encode()
881 		xdr->p = tail->iov_base + tail->iov_len;  in xdr_truncate_encode()
954 	struct kvec *iov = buf->tail;  in xdr_write_pages()
1025 		xdr_set_iov(xdr, xdr->buf->tail, xdr->nwords << 2);  in xdr_set_page()
1214 		/* Truncate page data and move it into the tail */  in xdr_align_pages()
1230  * bytes is moved into the XDR tail[].
1247 	xdr->iov = iov = buf->tail;  in xdr_read_pages()
1254 	 * Position current pointer at beginning of tail, and  in xdr_read_pages()
1290 		/* Move tail data into the pages, if necessary */  in xdr_align_data()
1345  * bytes is moved into the XDR tail[]. The current pointer is then
1352 	 * Position current pointer at beginning of tail, and  in xdr_enter_page()
1366 	buf->tail[0] = empty_iov;  in xdr_buf_from_iov()
1417 	if (base < buf->tail[0].iov_len) {  in xdr_buf_subsegment()
1418 		subbuf->tail[0].iov_base = buf->tail[0].iov_base + base;  in xdr_buf_subsegment()
1419 		subbuf->tail[0].iov_len = min_t(unsigned int, len,  in xdr_buf_subsegment()
1420 						buf->tail[0].iov_len - base);  in xdr_buf_subsegment()
1421 		len -= subbuf->tail[0].iov_len;  in xdr_buf_subsegment()
1424 		base -= buf->tail[0].iov_len;  in xdr_buf_subsegment()
1425 		subbuf->tail[0].iov_base = buf->tail[0].iov_base;  in xdr_buf_subsegment()
1426 		subbuf->tail[0].iov_len = 0;  in xdr_buf_subsegment()
1450 	if (buf->tail[0].iov_len) {  in xdr_buf_trim()
1451 		cur = min_t(size_t, buf->tail[0].iov_len, trim);  in xdr_buf_trim()
1452 		buf->tail[0].iov_len -= cur;  in xdr_buf_trim()
1489 	this_len = min_t(unsigned int, len, subbuf->tail[0].iov_len);  in __read_bytes_from_xdr_buf()
1490 	memcpy(obj, subbuf->tail[0].iov_base, this_len);  in __read_bytes_from_xdr_buf()
1520 	this_len = min_t(unsigned int, len, subbuf->tail[0].iov_len);  in __write_bytes_to_xdr_buf()
1521 	memcpy(subbuf->tail[0].iov_base, obj, this_len);  in __write_bytes_to_xdr_buf()
1718 		base = buf->page_len;  /* align to start of tail */  in xdr_xcode_array2()
1721 	/* process tail */  in xdr_xcode_array2()
1724 		c = buf->tail->iov_base + base;  in xdr_xcode_array2()
1772 	    buf->head->iov_len + buf->page_len + buf->tail->iov_len)  in xdr_encode_array2()
1831 	if (offset < buf->tail[0].iov_len) {  in xdr_process_buf()
1832 		thislen = buf->tail[0].iov_len - offset;  in xdr_process_buf()
1835 		sg_set_buf(sg, buf->tail[0].iov_base + offset, thislen);  in xdr_process_buf()