mirror of
https://github.com/SerenityOS/serenity
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16244c490a
We used to allocate major numbers quite randomly, with no common place to look them up if needed. This commit is changing that by placing all major number allocations under a new C++ namespace, in the API/MajorNumberAllocation.h file. We also add the foundations of what is needed before we can publish this information (allocated numbers for block and char devices) to userspace.
54 lines
1.8 KiB
C++
54 lines
1.8 KiB
C++
/*
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* Copyright (c) 2018-2020, 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/Devices/CharacterDevice.h>
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#include <Kernel/FileSystem/SysFS/Subsystems/DeviceIdentifiers/CharacterDevicesDirectory.h>
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namespace Kernel {
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CharacterDevice::CharacterDevice(MajorAllocation::CharacterDeviceFamily character_device_family, MinorNumber minor)
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: Device(MajorAllocation::character_device_family_to_major_number(character_device_family), minor)
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{
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}
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CharacterDevice::~CharacterDevice() = default;
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void CharacterDevice::after_inserting_add_symlink_to_device_identifier_directory()
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{
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VERIFY(m_symlink_sysfs_component);
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SysFSCharacterDevicesDirectory::the().devices_list({}).with([&](auto& list) -> void {
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list.append(*m_symlink_sysfs_component);
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});
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}
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void CharacterDevice::before_will_be_destroyed_remove_symlink_from_device_identifier_directory()
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{
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VERIFY(m_symlink_sysfs_component);
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SysFSCharacterDevicesDirectory::the().devices_list({}).with([&](auto& list) -> void {
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list.remove(*m_symlink_sysfs_component);
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});
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}
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// FIXME: This method will be eventually removed after all nodes in /sys/dev/char/ are symlinks
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void CharacterDevice::after_inserting_add_to_device_identifier_directory()
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{
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VERIFY(m_sysfs_component);
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SysFSCharacterDevicesDirectory::the().devices_list({}).with([&](auto& list) -> void {
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list.append(*m_sysfs_component);
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});
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}
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// FIXME: This method will be eventually removed after all nodes in /sys/dev/char/ are symlinks
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void CharacterDevice::before_will_be_destroyed_remove_from_device_identifier_directory()
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{
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VERIFY(m_sysfs_component);
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SysFSCharacterDevicesDirectory::the().devices_list({}).with([&](auto& list) -> void {
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list.remove(*m_sysfs_component);
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});
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}
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}
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