mirror of
https://github.com/RGBCube/serenity
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75f01692b4
Let's put the power_state global node into the /sys/kernel directory, because that directory represents all global nodes and variables being related to the Kernel. It's also a mutable node, that is more acceptable being in the mentioned directory due to the fact that all other files in the /sys/firmware directory are just firmware blobs and are not mutable at all.
111 lines
3.1 KiB
C++
111 lines
3.1 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Platform.h>
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#if ARCH(I386) || ARCH(X86_64)
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# include <Kernel/Arch/x86/common/I8042Reboot.h>
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# include <Kernel/Arch/x86/common/Shutdown.h>
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#endif
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#include <Kernel/FileSystem/FileSystem.h>
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#include <Kernel/FileSystem/SysFS/Subsystems/Kernel/PowerStateSwitch.h>
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#include <Kernel/Firmware/ACPI/Parser.h>
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#include <Kernel/Process.h>
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#include <Kernel/Sections.h>
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#include <Kernel/TTY/ConsoleManagement.h>
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namespace Kernel {
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mode_t SysFSPowerStateSwitchNode::permissions() const
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{
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return S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
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}
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UNMAP_AFTER_INIT NonnullLockRefPtr<SysFSPowerStateSwitchNode> SysFSPowerStateSwitchNode::must_create(SysFSDirectory const& parent_directory)
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{
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return adopt_lock_ref_if_nonnull(new (nothrow) SysFSPowerStateSwitchNode(parent_directory)).release_nonnull();
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}
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UNMAP_AFTER_INIT SysFSPowerStateSwitchNode::SysFSPowerStateSwitchNode(SysFSDirectory const& parent_directory)
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: SysFSComponent(parent_directory)
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{
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}
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ErrorOr<void> SysFSPowerStateSwitchNode::truncate(u64 size)
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{
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// Note: This node doesn't store any useful data anyway, so we can safely
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// truncate this to zero (essentially ignoring the request without failing).
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if (size != 0)
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return EPERM;
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return {};
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}
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ErrorOr<size_t> SysFSPowerStateSwitchNode::write_bytes(off_t offset, size_t count, UserOrKernelBuffer const& data, OpenFileDescription*)
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{
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if (Checked<off_t>::addition_would_overflow(offset, count))
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return EOVERFLOW;
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if (offset > 0)
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return EINVAL;
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if (count > 1)
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return EINVAL;
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char buf[1];
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TRY(data.read(buf, 1));
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switch (buf[0]) {
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case '0':
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return EINVAL;
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case '1':
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reboot();
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VERIFY_NOT_REACHED();
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case '2':
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poweroff();
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VERIFY_NOT_REACHED();
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default:
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return EINVAL;
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}
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VERIFY_NOT_REACHED();
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}
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void SysFSPowerStateSwitchNode::reboot()
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{
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MutexLocker locker(Process::current().big_lock());
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dbgln("acquiring FS locks...");
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FileSystem::lock_all();
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dbgln("syncing mounted filesystems...");
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FileSystem::sync();
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dbgln("attempting reboot via ACPI");
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if (ACPI::is_enabled())
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ACPI::Parser::the()->try_acpi_reboot();
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#if ARCH(I386) || ARCH(X86_64)
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i8042_reboot();
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#endif
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dbgln("reboot attempts failed, applications will stop responding.");
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dmesgln("Reboot can't be completed. It's safe to turn off the computer!");
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Processor::halt();
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}
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void SysFSPowerStateSwitchNode::poweroff()
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{
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MutexLocker locker(Process::current().big_lock());
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ConsoleManagement::the().switch_to_debug();
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dbgln("acquiring FS locks...");
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FileSystem::lock_all();
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dbgln("syncing mounted filesystems...");
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FileSystem::sync();
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dbgln("attempting system shutdown...");
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#if ARCH(I386) || ARCH(X86_64)
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qemu_shutdown();
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virtualbox_shutdown();
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#endif
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dbgln("shutdown attempts failed, applications will stop responding.");
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dmesgln("Shutdown can't be completed. It's safe to turn off the computer!");
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Processor::halt();
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}
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}
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