func (d *etcDriver) Create(rq dkvolume.Request) dkvolume.Response {
var res dkvolume.Response
if !strings.HasPrefix(rq.Name, "@") {
return responseErrorString("a etcd path has to start with a @")
}
d.mux.Lock()
defer d.mux.Unlock()
_, ok := d.mountpoints[rq.Name]
if ok {
return res
}
pt := d.createPath(rq.Name)
if err := os.MkdirAll(pt, 0755); err != nil {
return responseError(fmt.Errorf("cannot mkdir: %s", err))
}
rootfs := "/" + d.asEtcdRoot(rq.Name)
root := pathfs.NewPrefixFileSystem(&d.etcdbackend, rootfs)
nfs := pathfs.NewPathNodeFs(root, nil)
server, _, err := nodefs.MountRoot(pt, nfs.Root(), nil)
if err != nil {
return responseError(fmt.Errorf("cannot mount root : %s", err))
}
es := etcdFuseServer{pt, server, 0}
d.mountpoints[rq.Name] = &es
go server.Serve()
return res
}
func (fuseFS *fuseFS) newWorkerFS(id string) (*workerFS, error) {
fs := &workerFS{
id: id,
fuseFS: fuseFS,
tmpDir: filepath.Join(fuseFS.tmpDir, id),
}
fs.state = newWorkerFSState(fs)
type dirInit struct {
dst *string
val string
}
fs.rwDir = filepath.Join(fs.tmpDir, "rw")
if err := os.MkdirAll(fs.rwDir, 0700); err != nil {
return nil, err
}
prefixFS := pathfs.NewPrefixFileSystem(fuseFS.rpcFS, fs.fuseFS.writableRoot)
fs.annotatingFS = NewAnnotatingFS(prefixFS)
var err error
fs.unionFs, err = termitefs.NewMemUnionFs(
fs.rwDir, fs.annotatingFS)
if err != nil {
return nil, err
}
fs.rootDir = filepath.Join(fuseFS.mount, id)
if code := fs.fuseFS.rpcNodeFS.Mount(
id, fs.unionFs.Root(), nodeFSOptions()); !code.Ok() {
return nil, errors.New(fmt.Sprintf("submount writable root %s: %v", fs.fuseFS.writableRoot, code))
}
return fs, nil
}