zircon/system/core/devmgr/fshost/filesystem-mounter.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 <memory>

#include <fbl/unique_fd.h>
#include <fs-management/mount.h>
#include <lib/zx/channel.h>
#include <zircon/types.h>

#include "fs-manager.h"

namespace devmgr {

// FilesystemMounter is a utility class which wraps the Fsmanager
// and helps clients mount filesystems within the fshost namespace.
class FilesystemMounter {
public:
    FilesystemMounter(std::unique_ptr<FsManager> fshost, bool netboot,
                      bool check_filesystems)
        : fshost_(std::move(fshost)), netboot_(netboot), check_filesystems_(check_filesystems) {}

    void FuchsiaStart() const { fshost_->FuchsiaStart(); }

    zx_status_t InstallFs(const char* path, zx::channel h) {
        return fshost_->InstallFs(path, std::move(h));
    }

    bool Netbooting() const { return netboot_; }
    bool ShouldCheckFilesystems() const { return check_filesystems_; }

    // Attempts to mount a block device backed by |fd| to "/data".
    // Fails if already mounted.
    zx_status_t MountData(fbl::unique_fd fd, mount_options_t* options);

    // Attempts to mount a block device backed by |fd| to "/install".
    // Fails if already mounted.
    zx_status_t MountInstall(fbl::unique_fd fd, mount_options_t* options);

    // Attempts to mount a block device backed by |fd| to "/blob".
    // Fails if already mounted.
    zx_status_t MountBlob(fbl::unique_fd fd, mount_options_t* options);

private:
    std::unique_ptr<FsManager> fshost_;
    const bool netboot_ = false;
    const bool check_filesystems_ = false;
    bool data_mounted_ = false;
    bool install_mounted_ = false;
    bool blob_mounted_ = false;
};

} // namespace devmgr