-int dm_init(struct crypt_device *context, int check_kernel);
-void dm_exit(void);
-int dm_remove_device(const char *name, int force, uint64_t size);
-int dm_status_device(const char *name);
-int dm_status_suspended(const char *name);
-int dm_status_verity_ok(const char *name);
-int dm_query_device(const char *name, uint32_t get_flags,
- struct crypt_dm_active_device *dmd);
-int dm_query_verity(const char *name,
- struct crypt_dm_active_verity *dmd);
-int dm_create_device(const char *name,
- const char *type,
- struct crypt_dm_active_device *dmd,
- int reload);
-int dm_create_verity(const char *name,
- struct crypt_params_verity *params,
- struct crypt_dm_active_verity *dmd);
-int dm_suspend_and_wipe_key(const char *name);
-int dm_resume_and_reinstate_key(const char *name,
- size_t key_size,
- const char *key);
-char *dm_device_path(const char *prefix, int major, int minor);
-int dm_is_dm_device(int major, int minor);
-int dm_is_dm_kernel_name(const char *name);
-int dm_check_segment(const char *name, uint64_t offset, uint64_t size);