697 abd_iter_scatter_chunk_offset(struct abd_iter *aiter)  in abd_iter_scatter_chunk_offset()  argument
699 	ASSERT(!abd_is_linear(aiter->iter_abd));  in abd_iter_scatter_chunk_offset()
700 	return ((aiter->iter_abd->abd_u.abd_scatter.abd_offset +  in abd_iter_scatter_chunk_offset()
701 	    aiter->iter_pos) % zfs_abd_chunk_size);  in abd_iter_scatter_chunk_offset()
705 abd_iter_scatter_chunk_index(struct abd_iter *aiter)  in abd_iter_scatter_chunk_index()  argument
707 	ASSERT(!abd_is_linear(aiter->iter_abd));  in abd_iter_scatter_chunk_index()
708 	return ((aiter->iter_abd->abd_u.abd_scatter.abd_offset +  in abd_iter_scatter_chunk_index()
709 	    aiter->iter_pos) / zfs_abd_chunk_size);  in abd_iter_scatter_chunk_index()
716 abd_iter_init(struct abd_iter *aiter, abd_t *abd)  in abd_iter_init()  argument
719 	aiter->iter_abd = abd;  in abd_iter_init()
720 	aiter->iter_pos = 0;  in abd_iter_init()
721 	aiter->iter_mapaddr = NULL;  in abd_iter_init()
722 	aiter->iter_mapsize = 0;  in abd_iter_init()
731 abd_iter_advance(struct abd_iter *aiter, size_t amount)  in abd_iter_advance()  argument
733 	ASSERT3P(aiter->iter_mapaddr, ==, NULL);  in abd_iter_advance()
734 	ASSERT0(aiter->iter_mapsize);  in abd_iter_advance()
737 	if (aiter->iter_pos == aiter->iter_abd->abd_size)  in abd_iter_advance()
740 	aiter->iter_pos += amount;  in abd_iter_advance()
748 abd_iter_map(struct abd_iter *aiter)  in abd_iter_map()  argument
753 	ASSERT3P(aiter->iter_mapaddr, ==, NULL);  in abd_iter_map()
754 	ASSERT0(aiter->iter_mapsize);  in abd_iter_map()
757 	IMPLY(!abd_is_linear(aiter->iter_abd), zfs_abd_chunk_size ==  in abd_iter_map()
758 	    aiter->iter_abd->abd_u.abd_scatter.abd_chunk_size);  in abd_iter_map()
761 	if (aiter->iter_pos == aiter->iter_abd->abd_size)  in abd_iter_map()
764 	if (abd_is_linear(aiter->iter_abd)) {  in abd_iter_map()
765 		offset = aiter->iter_pos;  in abd_iter_map()
766 		aiter->iter_mapsize = aiter->iter_abd->abd_size - offset;  in abd_iter_map()
767 		paddr = aiter->iter_abd->abd_u.abd_linear.abd_buf;  in abd_iter_map()
769 		size_t index = abd_iter_scatter_chunk_index(aiter);  in abd_iter_map()
770 		offset = abd_iter_scatter_chunk_offset(aiter);  in abd_iter_map()
771 		aiter->iter_mapsize = MIN(zfs_abd_chunk_size - offset,  in abd_iter_map()
772 		    aiter->iter_abd->abd_size - aiter->iter_pos);  in abd_iter_map()
773 		paddr = aiter->iter_abd->abd_u.abd_scatter.abd_chunks[index];  in abd_iter_map()
775 	aiter->iter_mapaddr = (char *)paddr + offset;  in abd_iter_map()
783 abd_iter_unmap(struct abd_iter *aiter)  in abd_iter_unmap()  argument
786 	if (aiter->iter_pos == aiter->iter_abd->abd_size)  in abd_iter_unmap()
789 	ASSERT3P(aiter->iter_mapaddr, !=, NULL);  in abd_iter_unmap()
790 	ASSERT3U(aiter->iter_mapsize, >, 0);  in abd_iter_unmap()
792 	aiter->iter_mapaddr = NULL;  in abd_iter_unmap()
793 	aiter->iter_mapsize = 0;  in abd_iter_unmap()
801 	struct abd_iter aiter;  in abd_iterate_func()  local
806 	abd_iter_init(&aiter, abd);  in abd_iterate_func()
807 	abd_iter_advance(&aiter, off);  in abd_iterate_func()
810 		abd_iter_map(&aiter);  in abd_iterate_func()
812 		size_t len = MIN(aiter.iter_mapsize, size);  in abd_iterate_func()
815 		ret = func(aiter.iter_mapaddr, len, private);  in abd_iterate_func()
817 		abd_iter_unmap(&aiter);  in abd_iterate_func()
823 		abd_iter_advance(&aiter, len);  in abd_iterate_func()