Function abd_iterate_func

freebsd/contrib/openzfs/module/zfs/abd.c:780–818

}

int
abd_iterate_func(abd_t *abd, size_t off, size_t size,
    abd_iter_func_t *func, void *private)
{
	struct abd_iter aiter;
	int ret = 0;

	if (size == 0)
		return (0);

	abd_verify(abd);
	ASSERT3U(off + size, <=, abd->abd_size);

	boolean_t abd_multi = abd_is_gang(abd);
	abd_t *c_abd = abd_init_abd_iter(abd, &aiter, off);

	while (size > 0) {
		/* If we are at the end of the gang ABD we are done */
		if (abd_multi && !c_abd)
			break;

		abd_iter_map(&aiter);

		size_t len = MIN(aiter.iter_mapsize, size);
		ASSERT3U(len, >, 0);

		ret = func(aiter.iter_mapaddr, len, private);

		abd_iter_unmap(&aiter);

		if (ret != 0)
			break;

		size -= len;
		c_abd = abd_advance_abd_iter(abd, c_abd, &aiter, len);
	}

	return (ret);
}

struct buf_arg {
	void *arg_buf;