diff options
Diffstat (limited to 'pkg/sentry/fsimpl/proc/tasks_files.go')
-rw-r--r-- | pkg/sentry/fsimpl/proc/tasks_files.go | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/pkg/sentry/fsimpl/proc/tasks_files.go b/pkg/sentry/fsimpl/proc/tasks_files.go deleted file mode 100644 index 91f30a798..000000000 --- a/pkg/sentry/fsimpl/proc/tasks_files.go +++ /dev/null @@ -1,92 +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 ( - "fmt" - "strconv" - - "gvisor.dev/gvisor/pkg/abi/linux" - "gvisor.dev/gvisor/pkg/sentry/context" - "gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs" - "gvisor.dev/gvisor/pkg/sentry/kernel" - "gvisor.dev/gvisor/pkg/sentry/kernel/auth" - "gvisor.dev/gvisor/pkg/syserror" -) - -type selfSymlink struct { - kernfs.InodeAttrs - kernfs.InodeNoopRefCount - kernfs.InodeSymlink - - pidns *kernel.PIDNamespace -} - -var _ kernfs.Inode = (*selfSymlink)(nil) - -func newSelfSymlink(creds *auth.Credentials, ino uint64, perm linux.FileMode, pidns *kernel.PIDNamespace) *kernfs.Dentry { - inode := &selfSymlink{pidns: pidns} - inode.Init(creds, ino, linux.ModeSymlink|perm) - - d := &kernfs.Dentry{} - d.Init(inode) - return d -} - -func (s *selfSymlink) Readlink(ctx context.Context) (string, error) { - t := kernel.TaskFromContext(ctx) - if t == nil { - // Who is reading this link? - return "", syserror.EINVAL - } - tgid := s.pidns.IDOfThreadGroup(t.ThreadGroup()) - if tgid == 0 { - return "", syserror.ENOENT - } - return strconv.FormatUint(uint64(tgid), 10), nil -} - -type threadSelfSymlink struct { - kernfs.InodeAttrs - kernfs.InodeNoopRefCount - kernfs.InodeSymlink - - pidns *kernel.PIDNamespace -} - -var _ kernfs.Inode = (*threadSelfSymlink)(nil) - -func newThreadSelfSymlink(creds *auth.Credentials, ino uint64, perm linux.FileMode, pidns *kernel.PIDNamespace) *kernfs.Dentry { - inode := &threadSelfSymlink{pidns: pidns} - inode.Init(creds, ino, linux.ModeSymlink|perm) - - d := &kernfs.Dentry{} - d.Init(inode) - return d -} - -func (s *threadSelfSymlink) Readlink(ctx context.Context) (string, error) { - t := kernel.TaskFromContext(ctx) - if t == nil { - // Who is reading this link? - return "", syserror.EINVAL - } - tgid := s.pidns.IDOfThreadGroup(t.ThreadGroup()) - tid := s.pidns.IDOfTask(t) - if tid == 0 || tgid == 0 { - return "", syserror.ENOENT - } - return fmt.Sprintf("%d/task/%d", tgid, tid), nil -} |