1 files changed, 56 insertions, 0 deletions
diff --git a/pkg/sentry/fs/proc/file.go b/pkg/sentry/fs/proc/file.go
new file mode 100644
index 000000000..9a433cdf8
--- /dev/null
+++ b/pkg/sentry/fs/proc/file.go
@@ -0,0 +1,56 @@
+// Copyright 2018 Google Inc.
+//
+// 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 (
+	"gvisor.googlesource.com/gvisor/pkg/sentry/context"
+	"gvisor.googlesource.com/gvisor/pkg/sentry/fs"
+	"gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/device"
+	"gvisor.googlesource.com/gvisor/pkg/sentry/kernel"
+	"gvisor.googlesource.com/gvisor/pkg/sentry/usermem"
+)
+
+type file struct {
+	fs.InodeOperations
+
+	// nodeType is the file type of this file.
+	nodeType fs.InodeType
+
+	// t is the associated kernel task that owns this file.
+	t *kernel.Task
+}
+
+func newFile(node fs.InodeOperations, msrc *fs.MountSource, nodeType fs.InodeType, t *kernel.Task) *fs.Inode {
+	iops := &file{node, nodeType, t}
+	sattr := fs.StableAttr{
+		DeviceID:  device.ProcDevice.DeviceID(),
+		InodeID:   device.ProcDevice.NextIno(),
+		BlockSize: usermem.PageSize,
+		Type:      nodeType,
+	}
+	return fs.NewInode(iops, msrc, sattr)
+}
+
+// UnstableAttr returns all attributes of this file.
+func (f *file) UnstableAttr(ctx context.Context, inode *fs.Inode) (fs.UnstableAttr, error) {
+	uattr, err := f.InodeOperations.UnstableAttr(ctx, inode)
+	if err != nil {
+		return fs.UnstableAttr{}, err
+	}
+	if f.t != nil {
+		uattr.Owner = fs.FileOwnerFromContext(f.t)
+	}
+	return uattr, nil
+}