1 files changed, 0 insertions, 141 deletions
diff --git a/pkg/sentry/vfs/timerfd.go b/pkg/sentry/vfs/timerfd.go
deleted file mode 100644
index cc536ceaf..000000000
--- a/pkg/sentry/vfs/timerfd.go
+++ /dev/null
@@ -1,141 +0,0 @@
-// Copyright 2020 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package vfs
-
-import (
-	"sync/atomic"
-
-	"gvisor.dev/gvisor/pkg/context"
-	ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time"
-	"gvisor.dev/gvisor/pkg/syserror"
-	"gvisor.dev/gvisor/pkg/usermem"
-	"gvisor.dev/gvisor/pkg/waiter"
-)
-
-// TimerFileDescription implements FileDescriptionImpl for timer fds. It also
-// implements ktime.TimerListener.
-type TimerFileDescription struct {
-	vfsfd FileDescription
-	FileDescriptionDefaultImpl
-	DentryMetadataFileDescriptionImpl
-
-	events waiter.Queue
-	timer  *ktime.Timer
-
-	// val is the number of timer expirations since the last successful
-	// call to PRead, or SetTime. val must be accessed using atomic memory
-	// operations.
-	val uint64
-}
-
-var _ FileDescriptionImpl = (*TimerFileDescription)(nil)
-var _ ktime.TimerListener = (*TimerFileDescription)(nil)
-
-// NewTimerFD returns a new timer fd.
-func (vfs *VirtualFilesystem) NewTimerFD(clock ktime.Clock, flags uint32) (*FileDescription, error) {
-	vd := vfs.NewAnonVirtualDentry("[timerfd]")
-	defer vd.DecRef()
-	tfd := &TimerFileDescription{}
-	tfd.timer = ktime.NewTimer(clock, tfd)
-	if err := tfd.vfsfd.Init(tfd, flags, vd.Mount(), vd.Dentry(), &FileDescriptionOptions{
-		UseDentryMetadata: true,
-		DenyPRead:         true,
-		DenyPWrite:        true,
-	}); err != nil {
-		return nil, err
-	}
-	return &tfd.vfsfd, nil
-}
-
-// Read implements FileDescriptionImpl.Read.
-func (tfd *TimerFileDescription) Read(ctx context.Context, dst usermem.IOSequence, opts ReadOptions) (int64, error) {
-	const sizeofUint64 = 8
-	if dst.NumBytes() < sizeofUint64 {
-		return 0, syserror.EINVAL
-	}
-	if val := atomic.SwapUint64(&tfd.val, 0); val != 0 {
-		var buf [sizeofUint64]byte
-		usermem.ByteOrder.PutUint64(buf[:], val)
-		if _, err := dst.CopyOut(ctx, buf[:]); err != nil {
-			// Linux does not undo consuming the number of
-			// expirations even if writing to userspace fails.
-			return 0, err
-		}
-		return sizeofUint64, nil
-	}
-	return 0, syserror.ErrWouldBlock
-}
-
-// Clock returns the timer fd's Clock.
-func (tfd *TimerFileDescription) Clock() ktime.Clock {
-	return tfd.timer.Clock()
-}
-
-// GetTime returns the associated Timer's setting and the time at which it was
-// observed.
-func (tfd *TimerFileDescription) GetTime() (ktime.Time, ktime.Setting) {
-	return tfd.timer.Get()
-}
-
-// SetTime atomically changes the associated Timer's setting, resets the number
-// of expirations to 0, and returns the previous setting and the time at which
-// it was observed.
-func (tfd *TimerFileDescription) SetTime(s ktime.Setting) (ktime.Time, ktime.Setting) {
-	return tfd.timer.SwapAnd(s, func() { atomic.StoreUint64(&tfd.val, 0) })
-}
-
-// Readiness implements waiter.Waitable.Readiness.
-func (tfd *TimerFileDescription) Readiness(mask waiter.EventMask) waiter.EventMask {
-	var ready waiter.EventMask
-	if atomic.LoadUint64(&tfd.val) != 0 {
-		ready |= waiter.EventIn
-	}
-	return ready
-}
-
-// EventRegister implements waiter.Waitable.EventRegister.
-func (tfd *TimerFileDescription) EventRegister(e *waiter.Entry, mask waiter.EventMask) {
-	tfd.events.EventRegister(e, mask)
-}
-
-// EventUnregister implements waiter.Waitable.EventUnregister.
-func (tfd *TimerFileDescription) EventUnregister(e *waiter.Entry) {
-	tfd.events.EventUnregister(e)
-}
-
-// PauseTimer pauses the associated Timer.
-func (tfd *TimerFileDescription) PauseTimer() {
-	tfd.timer.Pause()
-}
-
-// ResumeTimer resumes the associated Timer.
-func (tfd *TimerFileDescription) ResumeTimer() {
-	tfd.timer.Resume()
-}
-
-// Release implements FileDescriptionImpl.Release()
-func (tfd *TimerFileDescription) Release() {
-	tfd.timer.Destroy()
-}
-
-// Notify implements ktime.TimerListener.Notify.
-func (tfd *TimerFileDescription) Notify(exp uint64, setting ktime.Setting) (ktime.Setting, bool) {
-	atomic.AddUint64(&tfd.val, exp)
-	tfd.events.Notify(waiter.EventIn)
-	return ktime.Setting{}, false
-}
-
-// Destroy implements ktime.TimerListener.Destroy.
-func (tfd *TimerFileDescription) Destroy() {}