diff options
| author | Ting-Yu Wang <anivia@google.com> | 2020-02-21 15:41:56 -0800 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2020-02-21 15:42:56 -0800 |
| commit | b8f56c79be40d9c75f4e2f279c9d821d1c1c3569 (patch) | |
| tree | 219c962fd22141b5aced942272662c51faa86109 /pkg/abi/linux/ioctl.go | |
| parent | 10aa4d3b343255db45f5ca4ff7b51f21a309e10b (diff) | |
Implement tap/tun device in vfs.
PiperOrigin-RevId: 296526279
Diffstat (limited to 'pkg/abi/linux/ioctl.go')
| -rw-r--r-- | pkg/abi/linux/ioctl.go | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/pkg/abi/linux/ioctl.go b/pkg/abi/linux/ioctl.go index 0e18db9ef..2062e6a4b 100644 --- a/pkg/abi/linux/ioctl.go +++ b/pkg/abi/linux/ioctl.go @@ -72,3 +72,29 @@ const ( SIOCGMIIPHY = 0x8947 SIOCGMIIREG = 0x8948 ) + +// ioctl(2) directions. Used to calculate requests number. +// Constants from asm-generic/ioctl.h. +const ( + _IOC_NONE = 0 + _IOC_WRITE = 1 + _IOC_READ = 2 +) + +// Constants from asm-generic/ioctl.h. +const ( + _IOC_NRBITS = 8 + _IOC_TYPEBITS = 8 + _IOC_SIZEBITS = 14 + _IOC_DIRBITS = 2 + + _IOC_NRSHIFT = 0 + _IOC_TYPESHIFT = _IOC_NRSHIFT + _IOC_NRBITS + _IOC_SIZESHIFT = _IOC_TYPESHIFT + _IOC_TYPEBITS + _IOC_DIRSHIFT = _IOC_SIZESHIFT + _IOC_SIZEBITS +) + +// IOC outputs the result of _IOC macro in asm-generic/ioctl.h. +func IOC(dir, typ, nr, size uint32) uint32 { + return uint32(dir)<<_IOC_DIRSHIFT | typ<<_IOC_TYPESHIFT | nr<<_IOC_NRSHIFT | size<<_IOC_SIZESHIFT +} |