123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102 |
- // Copyright 2015 Google Inc. All Rights Reserved.
- //
- // 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 fuse
- import (
- "fmt"
- "os"
- "golang.org/x/net/context"
- )
- // Server is an interface for any type that knows how to serve ops read from a
- // connection.
- type Server interface {
- // Read and serve ops from the supplied connection until EOF. Do not return
- // until all operations have been responded to. Must not be called more than
- // once.
- ServeOps(*Connection)
- }
- // Mount attempts to mount a file system on the given directory, using the
- // supplied Server to serve connection requests. It blocks until the file
- // system is successfully mounted.
- func Mount(
- dir string,
- server Server,
- config *MountConfig) (mfs *MountedFileSystem, err error) {
- // Sanity check: make sure the mount point exists and is a directory. This
- // saves us from some confusing errors later on OS X.
- fi, err := os.Stat(dir)
- switch {
- case os.IsNotExist(err):
- return
- case err != nil:
- err = fmt.Errorf("Statting mount point: %v", err)
- return
- case !fi.IsDir():
- err = fmt.Errorf("Mount point %s is not a directory", dir)
- return
- }
- // Initialize the struct.
- mfs = &MountedFileSystem{
- dir: dir,
- joinStatusAvailable: make(chan struct{}),
- }
- // Begin the mounting process, which will continue in the background.
- ready := make(chan error, 1)
- dev, err := mount(dir, config, ready)
- if err != nil {
- err = fmt.Errorf("mount: %v", err)
- return
- }
- // Choose a parent context for ops.
- cfgCopy := *config
- if cfgCopy.OpContext == nil {
- cfgCopy.OpContext = context.Background()
- }
- // Create a Connection object wrapping the device.
- connection, err := newConnection(
- cfgCopy,
- config.DebugLogger,
- config.ErrorLogger,
- dev)
- if err != nil {
- err = fmt.Errorf("newConnection: %v", err)
- return
- }
- // Serve the connection in the background. When done, set the join status.
- go func() {
- server.ServeOps(connection)
- mfs.joinStatus = connection.close()
- close(mfs.joinStatusAvailable)
- }()
- // Wait for the mount process to complete.
- if err = <-ready; err != nil {
- err = fmt.Errorf("mount (background): %v", err)
- return
- }
- return
- }
|