Lines Matching defs:aiter

483 abd_iter_init(struct abd_iter *aiter, abd_t *abd)
487 	memset(aiter, 0, sizeof (struct abd_iter));
488 	aiter->iter_abd = abd;
496 abd_iter_at_end(struct abd_iter *aiter)
498 	return (aiter->iter_pos == aiter->iter_abd->abd_size);
503  * in use. This can be safely called when the aiter has already exhausted, in
507 abd_iter_advance(struct abd_iter *aiter, size_t amount)
509 	ASSERT3P(aiter->iter_mapaddr, ==, NULL);
510 	ASSERT0(aiter->iter_mapsize);
513 	if (abd_iter_at_end(aiter))
516 	aiter->iter_pos += amount;
520  * Map the current chunk into aiter. This can be safely called when the aiter
524 abd_iter_map(struct abd_iter *aiter)
528 	ASSERT3P(aiter->iter_mapaddr, ==, NULL);
529 	ASSERT0(aiter->iter_mapsize);
532 	if (abd_iter_at_end(aiter))
535 	abd_t *abd = aiter->iter_abd;
536 	size_t offset = aiter->iter_pos;
538 		aiter->iter_mapsize = abd->abd_size - offset;
541 		aiter->sf = NULL;
545 		aiter->iter_mapsize = MIN(PAGE_SIZE - offset,
546 		    abd->abd_size - aiter->iter_pos);
548 		    ABD_SCATTER(aiter->iter_abd).abd_chunks[index],
549 		    &aiter->sf);
554 		aiter->iter_mapsize = MIN(PAGE_SIZE - offset,
555 		    abd->abd_size - aiter->iter_pos);
557 	aiter->iter_mapaddr = (char *)paddr + offset;
561  * Unmap the current chunk from aiter. This can be safely called when the aiter
565 abd_iter_unmap(struct abd_iter *aiter)
567 	if (!abd_iter_at_end(aiter)) {
568 		ASSERT3P(aiter->iter_mapaddr, !=, NULL);
569 		ASSERT3U(aiter->iter_mapsize, >, 0);
572 	if (abd_is_from_pages(aiter->iter_abd) &&
573 	    !abd_is_linear_page(aiter->iter_abd)) {
574 		ASSERT3P(aiter->sf, !=, NULL);
575 		zfs_unmap_page(aiter->sf);
578 	aiter->iter_mapaddr = NULL;
579 	aiter->iter_mapsize = 0;