mirror of
https://github.com/rclone/rclone
synced 2024-11-29 07:55:12 +01:00
113 lines
2.9 KiB
Go
113 lines
2.9 KiB
Go
//go:build linux
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// Package mount implements a FUSE mounting system for rclone remotes.
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package mount
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import (
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"fmt"
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"time"
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"bazil.org/fuse"
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fusefs "bazil.org/fuse/fs"
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"github.com/rclone/rclone/cmd/mountlib"
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"github.com/rclone/rclone/fs"
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"github.com/rclone/rclone/vfs"
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)
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func init() {
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mountlib.NewMountCommand("mount", false, mount)
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mountlib.AddRc("mount", mount)
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}
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// mountOptions configures the options from the command line flags
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func mountOptions(VFS *vfs.VFS, device string, opt *mountlib.Options) (options []fuse.MountOption) {
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options = []fuse.MountOption{
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fuse.MaxReadahead(uint32(opt.MaxReadAhead)),
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fuse.Subtype("rclone"),
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fuse.FSName(device),
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// Options from benchmarking in the fuse module
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//fuse.MaxReadahead(64 * 1024 * 1024),
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//fuse.WritebackCache(),
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}
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if opt.AsyncRead {
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options = append(options, fuse.AsyncRead())
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}
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if opt.AllowOther {
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options = append(options, fuse.AllowOther())
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}
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if opt.AllowRoot {
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// options = append(options, fuse.AllowRoot())
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fs.Errorf(nil, "Ignoring --allow-root. Support has been removed upstream - see https://github.com/bazil/fuse/issues/144 for more info")
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}
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if opt.DefaultPermissions {
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options = append(options, fuse.DefaultPermissions())
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}
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if VFS.Opt.ReadOnly {
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options = append(options, fuse.ReadOnly())
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}
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if opt.WritebackCache {
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options = append(options, fuse.WritebackCache())
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}
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if opt.DaemonTimeout != 0 {
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options = append(options, fuse.DaemonTimeout(fmt.Sprint(int(time.Duration(opt.DaemonTimeout).Seconds()))))
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}
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if len(opt.ExtraOptions) > 0 {
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fs.Errorf(nil, "-o/--option not supported with this FUSE backend")
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}
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if len(opt.ExtraFlags) > 0 {
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fs.Errorf(nil, "--fuse-flag not supported with this FUSE backend")
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}
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return options
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}
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// mount the file system
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//
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// The mount point will be ready when this returns.
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//
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// returns an error, and an error channel for the serve process to
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// report an error when fusermount is called.
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func mount(VFS *vfs.VFS, mountpoint string, opt *mountlib.Options) (<-chan error, func() error, error) {
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f := VFS.Fs()
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if err := mountlib.CheckOverlap(f, mountpoint); err != nil {
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return nil, nil, err
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}
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if err := mountlib.CheckAllowNonEmpty(mountpoint, opt); err != nil {
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return nil, nil, err
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}
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fs.Debugf(f, "Mounting on %q", mountpoint)
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if opt.DebugFUSE {
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fuse.Debug = func(msg interface{}) {
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fs.Debugf("fuse", "%v", msg)
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}
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}
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c, err := fuse.Mount(mountpoint, mountOptions(VFS, opt.DeviceName, opt)...)
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if err != nil {
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return nil, nil, err
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}
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filesys := NewFS(VFS, opt)
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filesys.server = fusefs.New(c, nil)
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// Serve the mount point in the background returning error to errChan
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errChan := make(chan error, 1)
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go func() {
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err := filesys.server.Serve(filesys)
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closeErr := c.Close()
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if err == nil {
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err = closeErr
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}
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errChan <- err
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}()
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unmount := func() error {
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// Shutdown the VFS
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filesys.VFS.Shutdown()
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return fuse.Unmount(mountpoint)
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}
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return errChan, unmount, nil
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}
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