+ FS_ENCRYPTION_MODE_AES_256_CBC = 0x3
+ FS_ENCRYPTION_MODE_AES_256_CTS = 0x4
+ FS_ENCRYPTION_MODE_AES_256_GCM = 0x2
+ FS_ENCRYPTION_MODE_AES_256_XTS = 0x1
+ FS_ENCRYPTION_MODE_INVALID = 0x0
+ FS_IOC_GET_ENCRYPTION_POLICY = 0x800c6615
+ FS_IOC_GET_ENCRYPTION_PWSALT = 0x80106614
+ FS_IOC_SET_ENCRYPTION_POLICY = 0x400c6613
+ FS_KEY_DESCRIPTOR_SIZE = 0x8
+ FS_KEY_DESC_PREFIX = "fscrypt:"
+ FS_KEY_DESC_PREFIX_SIZE = 0x8
+ FS_MAX_KEY_SIZE = 0x40
+ FS_POLICY_FLAGS_PAD_16 = 0x2
+ FS_POLICY_FLAGS_PAD_32 = 0x3
+ FS_POLICY_FLAGS_PAD_4 = 0x0
+ FS_POLICY_FLAGS_PAD_8 = 0x1
+ FS_POLICY_FLAGS_PAD_MASK = 0x3
+ FS_POLICY_FLAGS_VALID = 0x3