huawei-mrd-kernel/include/uapi/linux/nsfs.h

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#ifndef __LINUX_NSFS_H
#define __LINUX_NSFS_H
#include <linux/ioctl.h>
#define NSIO 0xb7
/* Returns a file descriptor that refers to an owning user namespace */
#define NS_GET_USERNS _IO(NSIO, 0x1)
/* Returns a file descriptor that refers to a parent namespace */
#define NS_GET_PARENT _IO(NSIO, 0x2)
#endif /* __LINUX_NSFS_H */