zircon/system/core/devmgr/fshost/registry.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.

#pragma once

#include <fs/pseudo-dir.h>
#include <fs/synchronous-vfs.h>
#include <lib/async-loop/cpp/loop.h>
#include <lib/zx/channel.h>
#include <zircon/types.h>

#include "vnode.h"

namespace devmgr {
namespace fshost {

// A registry of filesystems, exposed through a VFS.
// For more context on the nodes being served and the API exposed, refer to "vnode.h".
class Registry {
public:
    // Creates the filesystem registry as a filesystem. Yes, you read that right.
    //
    // Within this sub-filesystem, there are two entries:
    // "/fuchsia.fshost.Filesystems": A directory of all registered filesystems.
    // "/fuchsia.fshost.Registry": A service node which may be used to register a filesystem.
    Registry(async::Loop* loop);

    // Give a channel to the root directory, where it will begin serving requests.
    zx_status_t ServeRoot(zx::channel server);

private:
    fs::SynchronousVfs vfs_;
    // An exported pseudo-directory containing access to all filesystem metadata.
    // This directory serves the "fuchsia.fshost" services.
    fbl::RefPtr<fs::PseudoDir> root_;
    // An exported service which allows control over the fshost itself.
    fbl::RefPtr<fshost::Vnode> svc_;
};

} // namespace fshost
} // namespace devmgr