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// 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 tmpfs
import (
"fmt"
"gvisor.dev/gvisor/pkg/abi/linux"
"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
"gvisor.dev/gvisor/pkg/sentry/vfs"
)
type deviceFile struct {
inode inode
kind vfs.DeviceKind
major uint32
minor uint32
}
func (fs *filesystem) newDeviceFile(kuid auth.KUID, kgid auth.KGID, mode linux.FileMode, kind vfs.DeviceKind, major, minor uint32) *inode {
file := &deviceFile{
kind: kind,
major: major,
minor: minor,
}
switch kind {
case vfs.BlockDevice:
mode |= linux.S_IFBLK
case vfs.CharDevice:
mode |= linux.S_IFCHR
default:
panic(fmt.Sprintf("invalid DeviceKind: %v", kind))
}
file.inode.init(file, fs, kuid, kgid, mode)
file.inode.nlink = 1 // from parent directory
return &file.inode
}
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