Function zfs_refcount_remove_many

freebsd/contrib/openzfs/module/zfs/refcount.c:152–199

}

int64_t
zfs_refcount_remove_many(zfs_refcount_t *rc, uint64_t number,
    const void *holder)
{
	reference_t *ref;
	int64_t count;

	mutex_enter(&rc->rc_mtx);
	ASSERT3U(rc->rc_count, >=, number);

	if (!rc->rc_tracked) {
		rc->rc_count -= number;
		count = rc->rc_count;
		mutex_exit(&rc->rc_mtx);
		return (count);
	}

	for (ref = list_head(&rc->rc_list); ref;
	    ref = list_next(&rc->rc_list, ref)) {
		if (ref->ref_holder == holder && ref->ref_number == number) {
			list_remove(&rc->rc_list, ref);
			if (reference_history > 0) {
				ref->ref_removed =
				    kmem_cache_alloc(reference_history_cache,
				    KM_SLEEP);
				list_insert_head(&rc->rc_removed, ref);
				rc->rc_removed_count++;
				if (rc->rc_removed_count > reference_history) {
					ref = list_tail(&rc->rc_removed);
					list_remove(&rc->rc_removed, ref);
					kmem_cache_free(reference_history_cache,
					    ref->ref_removed);
					kmem_cache_free(reference_cache, ref);
					rc->rc_removed_count--;
				}
			} else {
				kmem_cache_free(reference_cache, ref);
			}
			rc->rc_count -= number;
			count = rc->rc_count;
			mutex_exit(&rc->rc_mtx);
			return (count);
		}
	}
	panic("No such hold %p on refcount %llx", holder,
	    (u_longlong_t)(uintptr_t)rc);
	return (-1);
}

int64_t
zfs_refcount_remove(zfs_refcount_t *rc, const void *holder)