50 lines
1.3 KiB
Go
50 lines
1.3 KiB
Go
// Copyright 2020 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package tmpfs
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import (
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"fmt"
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"gvisor.dev/gvisor/pkg/abi/linux"
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"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
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"gvisor.dev/gvisor/pkg/sentry/vfs"
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)
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type deviceFile struct {
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inode inode
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kind vfs.DeviceKind
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major uint32
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minor uint32
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}
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func (fs *filesystem) newDeviceFile(creds *auth.Credentials, mode linux.FileMode, kind vfs.DeviceKind, major, minor uint32) *inode {
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file := &deviceFile{
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kind: kind,
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major: major,
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minor: minor,
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}
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switch kind {
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case vfs.BlockDevice:
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mode |= linux.S_IFBLK
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case vfs.CharDevice:
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mode |= linux.S_IFCHR
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default:
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panic(fmt.Sprintf("invalid DeviceKind: %v", kind))
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}
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file.inode.init(file, fs, creds, mode)
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file.inode.nlink = 1 // from parent directory
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return &file.inode
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}
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