NSIO
#define NS_GET_USERNS _IO(NSIO, 0x1)
#define NS_GET_PARENT _IO(NSIO, 0x2)
#define NS_GET_NSTYPE _IO(NSIO, 0x3)
#define NS_GET_OWNER_UID _IO(NSIO, 0x4)
#define NS_GET_PID_FROM_PIDNS _IOR(NSIO, 0x6, int)
#define NS_GET_TGID_FROM_PIDNS _IOR(NSIO, 0x7, int)
#define NS_GET_PID_IN_PIDNS _IOR(NSIO, 0x8, int)
#define NS_GET_TGID_IN_PIDNS _IOR(NSIO, 0x9, int)
#define NS_MNT_GET_INFO _IOR(NSIO, 10, struct mnt_ns_info)
#define NS_MNT_GET_NEXT _IOR(NSIO, 11, struct mnt_ns_info)
#define NS_MNT_GET_PREV _IOR(NSIO, 12, struct mnt_ns_info)
#define NS_GET_MNTNS_ID _IOR(NSIO, 5, __u64)
#define NS_GET_ID _IOR(NSIO, 13, __u64)
#define NS_GET_USERNS _IO(NSIO, 0x1)
#define NS_GET_PARENT _IO(NSIO, 0x2)
#define NS_GET_NSTYPE _IO(NSIO, 0x3)
#define NS_GET_OWNER_UID _IO(NSIO, 0x4)
#define NS_GET_PID_FROM_PIDNS _IOR(NSIO, 0x6, int)
#define NS_GET_TGID_FROM_PIDNS _IOR(NSIO, 0x7, int)
#define NS_GET_PID_IN_PIDNS _IOR(NSIO, 0x8, int)
#define NS_GET_TGID_IN_PIDNS _IOR(NSIO, 0x9, int)
#define NS_MNT_GET_INFO _IOR(NSIO, 10, struct mnt_ns_info)
#define NS_MNT_GET_NEXT _IOR(NSIO, 11, struct mnt_ns_info)
#define NS_MNT_GET_PREV _IOR(NSIO, 12, struct mnt_ns_info)
#define NS_GET_MNTNS_ID _IOR(NSIO, 5, __u64)
#define NS_GET_ID _IOR(NSIO, 13, __u64)
#define NS_GET_USERNS _IO(NSIO, 0x1)
#define NS_GET_USERNS _IO(NSIO, 0x1)
#define NS_GET_PARENT _IO(NSIO, 0x2)