Differential D19926 Diff 56258 head/sys/dev/random/random_infra.c

Changeset View

Standalone View

head/sys/dev/random/random_infra.c

	Show First 20 Lines • Show All 57 Lines • ▼ Show 20 Lines
	#if defined(RANDOM_LOADABLE)			#if defined(RANDOM_LOADABLE)

	static void			static void
	null_read_random(void *dummy __unused, u_int dummy2 __unused)			null_read_random(void *dummy __unused, u_int dummy2 __unused)
	{			{
	panic("%s: no random module is loaded", __func__);			panic("%s: no random module is loaded", __func__);
	}			}

				static bool
				null_is_random_seeded(void)
				{
				return (false);
				}

	struct random_readers {			struct random_readers {
	int (read_random_uio)(struct uio , bool);			int (read_random_uio)(struct uio , bool);
	void (read_random)(void , u_int);			void (read_random)(void , u_int);
				bool (*is_random_seeded)(void);
	} random_reader_context = {			} random_reader_context = {
	(int ()(struct uio , bool))nullop,			(int ()(struct uio , bool))nullop,
	null_read_random,			null_read_random,
				null_is_random_seeded,
	};			};

	struct sx randomdev_config_lock;			struct sx randomdev_config_lock;

	static void			static void
	random_infra_sysinit(void *dummy __unused)			random_infra_sysinit(void *dummy __unused)
	{			{

	RANDOM_CONFIG_INIT_LOCK();			RANDOM_CONFIG_INIT_LOCK();
	}			}
	SYSINIT(random_device_h_init, SI_SUB_RANDOM, SI_ORDER_FIRST, random_infra_sysinit, NULL);			SYSINIT(random_device_h_init, SI_SUB_RANDOM, SI_ORDER_FIRST, random_infra_sysinit, NULL);

	void			void
	random_infra_init(int (p_random_read_uio)(struct uio , bool), void (p_random_read)(void , u_int))			random_infra_init(int (p_random_read_uio)(struct uio , bool),
				void (p_random_read)(void , u_int),
				bool (*p_is_random_seeded)(void))
	{			{

	RANDOM_CONFIG_X_LOCK();			RANDOM_CONFIG_X_LOCK();
	random_reader_context.read_random_uio = p_random_read_uio;			random_reader_context.read_random_uio = p_random_read_uio;
	random_reader_context.read_random = p_random_read;			random_reader_context.read_random = p_random_read;
				random_reader_context.is_random_seeded = p_is_random_seeded;
	RANDOM_CONFIG_X_UNLOCK();			RANDOM_CONFIG_X_UNLOCK();
	}			}

	void			void
	random_infra_uninit(void)			random_infra_uninit(void)
	{			{

	RANDOM_CONFIG_X_LOCK();			RANDOM_CONFIG_X_LOCK();
	random_reader_context.read_random_uio = (int ()(struct uio , bool))nullop;			random_reader_context.read_random_uio = (int ()(struct uio , bool))nullop;
	random_reader_context.read_random = null_read_random;			random_reader_context.read_random = null_read_random;
				random_reader_context.is_random_seeded = null_is_random_seeded;
	RANDOM_CONFIG_X_UNLOCK();			RANDOM_CONFIG_X_UNLOCK();
	}			}

	static void			static void
	random_infra_sysuninit(void *dummy __unused)			random_infra_sysuninit(void *dummy __unused)
	{			{

	RANDOM_CONFIG_DEINIT_LOCK();			RANDOM_CONFIG_DEINIT_LOCK();
	Show All 14 Lines
	void			void
	read_random(void *buf, u_int len)			read_random(void *buf, u_int len)
	{			{

	RANDOM_CONFIG_S_LOCK();			RANDOM_CONFIG_S_LOCK();
	random_reader_context.read_random(buf, len);			random_reader_context.read_random(buf, len);
	RANDOM_CONFIG_S_UNLOCK();			RANDOM_CONFIG_S_UNLOCK();
	}			}

				bool
				is_random_seeded(void)
				{
				RANDOM_CONFIG_S_LOCK();
				random_reader_context.is_random_seeded();
				RANDOM_CONFIG_S_UNLOCK();
				}


	#endif /* defined(RANDOM_LOADABLE) */			#endif /* defined(RANDOM_LOADABLE) */