1 files changed, 0 insertions, 133 deletions
diff --git a/pkg/sentry/fsimpl/proc/subtasks.go b/pkg/sentry/fsimpl/proc/subtasks.go
deleted file mode 100644
index 611645f3f..000000000
--- a/pkg/sentry/fsimpl/proc/subtasks.go
+++ /dev/null
@@ -1,133 +0,0 @@
-// Copyright 2019 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 proc
-
-import (
-	"sort"
-	"strconv"
-
-	"gvisor.dev/gvisor/pkg/abi/linux"
-	"gvisor.dev/gvisor/pkg/context"
-	"gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs"
-	"gvisor.dev/gvisor/pkg/sentry/kernel"
-	"gvisor.dev/gvisor/pkg/sentry/vfs"
-	"gvisor.dev/gvisor/pkg/syserror"
-)
-
-// subtasksInode represents the inode for /proc/[pid]/task/ directory.
-//
-// +stateify savable
-type subtasksInode struct {
-	kernfs.InodeNotSymlink
-	kernfs.InodeDirectoryNoNewChildren
-	kernfs.InodeAttrs
-	kernfs.OrderedChildren
-
-	task              *kernel.Task
-	pidns             *kernel.PIDNamespace
-	inoGen            InoGenerator
-	cgroupControllers map[string]string
-}
-
-var _ kernfs.Inode = (*subtasksInode)(nil)
-
-func newSubtasks(task *kernel.Task, pidns *kernel.PIDNamespace, inoGen InoGenerator, cgroupControllers map[string]string) *kernfs.Dentry {
-	subInode := &subtasksInode{
-		task:              task,
-		pidns:             pidns,
-		inoGen:            inoGen,
-		cgroupControllers: cgroupControllers,
-	}
-	// Note: credentials are overridden by taskOwnedInode.
-	subInode.InodeAttrs.Init(task.Credentials(), inoGen.NextIno(), linux.ModeDirectory|0555)
-	subInode.OrderedChildren.Init(kernfs.OrderedChildrenOptions{})
-
-	inode := &taskOwnedInode{Inode: subInode, owner: task}
-	dentry := &kernfs.Dentry{}
-	dentry.Init(inode)
-
-	return dentry
-}
-
-// Valid implements kernfs.inodeDynamicLookup.
-func (i *subtasksInode) Valid(ctx context.Context) bool {
-	return true
-}
-
-// Lookup implements kernfs.inodeDynamicLookup.
-func (i *subtasksInode) Lookup(ctx context.Context, name string) (*vfs.Dentry, error) {
-	tid, err := strconv.ParseUint(name, 10, 32)
-	if err != nil {
-		return nil, syserror.ENOENT
-	}
-
-	subTask := i.pidns.TaskWithID(kernel.ThreadID(tid))
-	if subTask == nil {
-		return nil, syserror.ENOENT
-	}
-	if subTask.ThreadGroup() != i.task.ThreadGroup() {
-		return nil, syserror.ENOENT
-	}
-
-	subTaskDentry := newTaskInode(i.inoGen, subTask, i.pidns, false, i.cgroupControllers)
-	return subTaskDentry.VFSDentry(), nil
-}
-
-// IterDirents implements kernfs.inodeDynamicLookup.
-func (i *subtasksInode) IterDirents(ctx context.Context, cb vfs.IterDirentsCallback, offset, relOffset int64) (int64, error) {
-	tasks := i.task.ThreadGroup().MemberIDs(i.pidns)
-	if len(tasks) == 0 {
-		return offset, syserror.ENOENT
-	}
-
-	tids := make([]int, 0, len(tasks))
-	for _, tid := range tasks {
-		tids = append(tids, int(tid))
-	}
-
-	sort.Ints(tids)
-	for _, tid := range tids[relOffset:] {
-		dirent := vfs.Dirent{
-			Name:    strconv.FormatUint(uint64(tid), 10),
-			Type:    linux.DT_DIR,
-			Ino:     i.inoGen.NextIno(),
-			NextOff: offset + 1,
-		}
-		if err := cb.Handle(dirent); err != nil {
-			return offset, err
-		}
-		offset++
-	}
-	return offset, nil
-}
-
-// Open implements kernfs.Inode.
-func (i *subtasksInode) Open(rp *vfs.ResolvingPath, vfsd *vfs.Dentry, opts vfs.OpenOptions) (*vfs.FileDescription, error) {
-	fd := &kernfs.GenericDirectoryFD{}
-	fd.Init(rp.Mount(), vfsd, &i.OrderedChildren, &opts)
-	return fd.VFSFileDescription(), nil
-}
-
-// Stat implements kernfs.Inode.
-func (i *subtasksInode) Stat(vsfs *vfs.Filesystem, opts vfs.StatOptions) (linux.Statx, error) {
-	stat, err := i.InodeAttrs.Stat(vsfs, opts)
-	if err != nil {
-		return linux.Statx{}, err
-	}
-	if opts.Mask&linux.STATX_NLINK != 0 {
-		stat.Nlink += uint32(i.task.ThreadGroup().Count())
-	}
-	return stat, nil
-}