// Mount makes the contents of the volume visible at the given
// mountpoint. If Mount returns with a nil error, the mount has
// occurred.
func (ref *VolumeRef) Mount(mountpoint string) error {
ref.app.volumes.Lock()
defer ref.app.volumes.Unlock()
// TODO obey `bazil -debug server run`
if ref.mounted {
return errors.New("volume already mounted")
}
conn, err := fuse.Mount(mountpoint,
fuse.MaxReadahead(32*1024*1024),
fuse.AsyncRead(),
)
if err != nil {
return fmt.Errorf("mount fail: %v", err)
}
srv := fusefs.New(conn, nil)
serveErr := make(chan error, 1)
go func() {
defer func() {
// remove map entry on unmount or failed mount
ref.app.volumes.Lock()
ref.mounted = false
ref.conn = nil
ref.app.volumes.Unlock()
ref.app.volumes.Broadcast()
ref.Close()
}()
defer conn.Close()
ref.fs.SetFUSE(srv)
defer func() {
ref.fs.SetFUSE(nil)
}()
serveErr <- srv.Serve(ref.fs)
}()
select {
case <-conn.Ready:
if err := conn.MountError; err != nil {
return fmt.Errorf("mount fail (delayed): %v", err)
}
ref.refs++
ref.mounted = true
ref.conn = conn
ref.app.volumes.Broadcast()
return nil
case err := <-serveErr:
// Serve quit early
if err != nil {
return fmt.Errorf("filesystem failure: %v", err)
}
return errors.New("Serve exited early")
}
}
func benchmark(b *testing.B, fn func(b *testing.B, mnt string), conf *benchConfig) {
filesys := benchFS{
conf: conf,
}
mnt, err := fstestutil.Mounted(filesys, nil,
fuse.MaxReadahead(64*1024*1024),
fuse.AsyncRead(),
fuse.WritebackCache(),
)
if err != nil {
b.Fatal(err)
}
defer mnt.Close()
fn(b, mnt.Dir)
}