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https://github.com/SerenityOS/serenity
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96e1391c23
This change has many improvements: - We don't use `LockRefPtr` to hold instances of many base devices as with the DeviceManagement class. Instead, we have a saner pattern of holding them in a `NonnullRefPtr<T> const`, in a small-text footprint class definition in the `Device.cpp` file. - The awkwardness of using `::the()` each time we need to get references to mostly-static objects (like the Event queue) in runtime is now gone in the migration to using the `Device` class. - Acquiring a device feel more obvious because we use now the Device class for this method. The method name is improved as well.
76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
/*
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* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/API/DeviceFileTypes.h>
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#include <Kernel/Devices/Device.h>
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#include <Kernel/Devices/TTY/SlavePTY.h>
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#include <Kernel/FileSystem/DevPtsFS/FileSystem.h>
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#include <Kernel/FileSystem/DevPtsFS/Inode.h>
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#include <Kernel/Time/TimeManagement.h>
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namespace Kernel {
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ErrorOr<NonnullRefPtr<FileSystem>> DevPtsFS::try_create(FileSystemSpecificOptions const&)
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{
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return TRY(adopt_nonnull_ref_or_enomem(new (nothrow) DevPtsFS));
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}
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DevPtsFS::DevPtsFS() = default;
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DevPtsFS::~DevPtsFS() = default;
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ErrorOr<void> DevPtsFS::initialize()
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{
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m_root_inode = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) DevPtsFSInode(*this)));
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m_root_inode->m_metadata.inode = { fsid(), 1 };
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m_root_inode->m_metadata.mode = 0040555;
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m_root_inode->m_metadata.uid = 0;
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m_root_inode->m_metadata.gid = 0;
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m_root_inode->m_metadata.size = 0;
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m_root_inode->m_metadata.mtime = TimeManagement::boot_time();
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return {};
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}
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static unsigned inode_index_to_pty_index(InodeIndex inode_index)
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{
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VERIFY(inode_index > 1);
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return inode_index.value() - 2;
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}
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Inode& DevPtsFS::root_inode()
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{
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return *m_root_inode;
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}
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u8 DevPtsFS::internal_file_type_to_directory_entry_type(DirectoryEntryView const& entry) const
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{
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return ram_backed_file_type_to_directory_entry_type(entry);
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}
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ErrorOr<NonnullRefPtr<Inode>> DevPtsFS::get_inode(InodeIdentifier inode_id) const
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{
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if (inode_id.index() == 1)
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return *m_root_inode;
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unsigned pty_index = inode_index_to_pty_index(inode_id.index());
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auto device = Device::acquire_by_type_and_major_minor_numbers(DeviceNodeType::Character, 201, pty_index);
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VERIFY(device);
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auto& pts_device = static_cast<SlavePTY&>(*device);
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auto inode = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) DevPtsFSInode(const_cast<DevPtsFS&>(*this), inode_id.index(), pts_device)));
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inode->m_metadata.inode = inode_id;
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inode->m_metadata.size = 0;
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inode->m_metadata.uid = pts_device.uid();
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inode->m_metadata.gid = pts_device.gid();
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inode->m_metadata.mode = 0020600;
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inode->m_metadata.major_device = device->major();
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inode->m_metadata.minor_device = device->minor();
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inode->m_metadata.mtime = TimeManagement::boot_time();
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return inode;
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}
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}
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