src/storage/fshost/registry_vnode.h

// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SRC_STORAGE_FSHOST_REGISTRY_VNODE_H_
#define SRC_STORAGE_FSHOST_REGISTRY_VNODE_H_

#include <fuchsia/fshost/llcpp/fidl.h>
#include <lib/async-loop/cpp/loop.h>
#include <lib/async-loop/default.h>
#include <lib/zx/channel.h>

#include "src/lib/storage/vfs/cpp/pseudo_dir.h"
#include "src/lib/storage/vfs/cpp/service.h"
#include "src/lib/storage/vfs/cpp/vfs_types.h"

namespace devmgr {
namespace fshost {

// The fshost Vnode represents access to a registry of filesystems.
class RegistryVnode final : public fidl::WireInterface<fuchsia_fshost::Registry>,
                            public fs::Service {
 public:
  // Constructs the vnode, providing a |filesystems| node to which this node will
  // register remote filesystems.
  RegistryVnode(async_dispatcher_t* dispatcher, fbl::RefPtr<fs::PseudoDir> filesystems);

  // Register a remote |directory| to |filesystems|.
  zx_status_t AddFilesystem(fidl::ClientEnd<fuchsia_io::Directory> directory);

  // FIDL method from |fuchsia.fshost.Registry|.
  void RegisterFilesystem(fidl::ClientEnd<fuchsia_io::Directory> public_export,
                          RegisterFilesystemCompleter::Sync& completer) final;

 private:
  // All registered filesystems known to the fshost.
  fbl::RefPtr<fs::PseudoDir> filesystems_;
  // An always-increasing counter used to identify new filesystems.
  uint64_t filesystem_counter_ = 0;
  async_dispatcher_t* dispatcher_;
};

}  // namespace fshost
}  // namespace devmgr

#endif  // SRC_STORAGE_FSHOST_REGISTRY_VNODE_H_