30 lines
633 B
Go
30 lines
633 B
Go
//go:build linux && cgo
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// +build linux,cgo
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package devicemapper // import "github.com/docker/docker/pkg/devicemapper"
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import (
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"unsafe"
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"golang.org/x/sys/unix"
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)
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func ioctlBlkGetSize64(fd uintptr) (int64, error) {
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var size int64
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if _, _, err := unix.Syscall(unix.SYS_IOCTL, fd, BlkGetSize64, uintptr(unsafe.Pointer(&size))); err != 0 {
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return 0, err
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}
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return size, nil
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}
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func ioctlBlkDiscard(fd uintptr, offset, length uint64) error {
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var r [2]uint64
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r[0] = offset
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r[1] = length
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if _, _, err := unix.Syscall(unix.SYS_IOCTL, fd, BlkDiscard, uintptr(unsafe.Pointer(&r[0]))); err != 0 {
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return err
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}
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return nil
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}
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