| // Copyright (c) 2011 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "cros-disks/system_mounter.h" |
| |
| #include <errno.h> |
| #include <sys/mount.h> |
| |
| #include <string> |
| #include <utility> |
| |
| #include <base/logging.h> |
| |
| #include "cros-disks/mount_options.h" |
| #include "cros-disks/mount_point.h" |
| #include "cros-disks/platform.h" |
| |
| namespace cros_disks { |
| |
| namespace { |
| |
| // A MountPoint that uses the umount() syscall for unmounting. |
| class SystemMountPoint : public MountPoint { |
| public: |
| SystemMountPoint(const base::FilePath& path, const Platform* platform) |
| : MountPoint(path), platform_(platform) {} |
| |
| ~SystemMountPoint() override { DestructorUnmount(); } |
| |
| protected: |
| MountErrorType UnmountImpl() override { |
| MountErrorType error = platform_->Unmount(path().value(), 0); |
| if (error == MOUNT_ERROR_PATH_ALREADY_MOUNTED) { |
| LOG(WARNING) << "Device is busy, trying lazy unmount on " |
| << path().value(); |
| error = platform_->Unmount(path().value(), MNT_DETACH); |
| } |
| return error; |
| } |
| |
| private: |
| const Platform* platform_; |
| |
| DISALLOW_IMPLICIT_CONSTRUCTORS(SystemMountPoint); |
| }; |
| |
| } // namespace |
| |
| SystemMounter::SystemMounter(const std::string& filesystem_type, |
| const Platform* platform) |
| : Mounter(filesystem_type), platform_(platform) {} |
| |
| SystemMounter::~SystemMounter() = default; |
| |
| std::unique_ptr<MountPoint> SystemMounter::Mount( |
| const std::string& source, |
| const base::FilePath& target_path, |
| std::vector<std::string> options, |
| MountErrorType* error) const { |
| MountOptions mount_options; |
| // If the |options| vector contains uid/gid options, these need to be accepted |
| // by MountOptions::Initialize(). To do this, |set_user_and_group_id| must be |
| // true. However, if |options| doesn't have these options, |
| // MountOptions::Initialize() won't create these, because the |
| // |default_user_id| and |default_group_id arguments| are empty. |
| mount_options.Initialize(options, true /* set_user_and_group_id */, "", ""); |
| auto flags_and_data = mount_options.ToMountFlagsAndData(); |
| |
| *error = platform_->Mount(source, target_path.value(), filesystem_type(), |
| flags_and_data.first, flags_and_data.second); |
| if (*error != MOUNT_ERROR_NONE) { |
| return nullptr; |
| } |
| |
| return std::make_unique<SystemMountPoint>(target_path, platform_); |
| } |
| |
| bool SystemMounter::CanMount(const std::string& source, |
| const std::vector<std::string>& options, |
| base::FilePath* suggested_dir_name) const { |
| if (source.empty()) { |
| *suggested_dir_name = base::FilePath("disk"); |
| } else { |
| *suggested_dir_name = base::FilePath(source).BaseName(); |
| } |
| return true; |
| } |
| |
| } // namespace cros_disks |