github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/pkg/sentry/fsimpl/fuse/register.go (about)

     1  // Copyright 2020 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package fuse
    16  
    17  import (
    18  	"github.com/SagerNet/gvisor/pkg/abi/linux"
    19  	"github.com/SagerNet/gvisor/pkg/context"
    20  	"github.com/SagerNet/gvisor/pkg/sentry/fsimpl/devtmpfs"
    21  	"github.com/SagerNet/gvisor/pkg/sentry/vfs"
    22  )
    23  
    24  // Register registers the FUSE device with vfsObj.
    25  func Register(vfsObj *vfs.VirtualFilesystem) error {
    26  	if err := vfsObj.RegisterDevice(vfs.CharDevice, linux.MISC_MAJOR, fuseDevMinor, fuseDevice{}, &vfs.RegisterDeviceOptions{
    27  		GroupName: "misc",
    28  	}); err != nil {
    29  		return err
    30  	}
    31  
    32  	return nil
    33  }
    34  
    35  // CreateDevtmpfsFile creates a device special file in devtmpfs.
    36  func CreateDevtmpfsFile(ctx context.Context, dev *devtmpfs.Accessor) error {
    37  	if err := dev.CreateDeviceFile(ctx, "fuse", vfs.CharDevice, linux.MISC_MAJOR, fuseDevMinor, 0666 /* mode */); err != nil {
    38  		return err
    39  	}
    40  
    41  	return nil
    42  }