mirror of
https://github.com/RGBCube/serenity
synced 2026-01-17 04:41:00 +00:00
b02ee664e7
To do this we also need to get rid of LockRefPtrs in the USB code as well. Most of the SysFS nodes are statically generated during boot and are not mutated afterwards. The same goes for general device code - once we generate the appropriate SysFS nodes, we almost never mutate the node pointers afterwards, making locking unnecessary.
110 lines
3.3 KiB
C++
110 lines
3.3 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/Platform.h>
|
|
#if ARCH(X86_64)
|
|
# include <Kernel/Arch/x86_64/I8042Reboot.h>
|
|
# include <Kernel/Arch/x86_64/Shutdown.h>
|
|
#endif
|
|
#include <Kernel/FileSystem/FileSystem.h>
|
|
#include <Kernel/FileSystem/SysFS/Subsystems/Kernel/PowerStateSwitch.h>
|
|
#include <Kernel/Firmware/ACPI/Parser.h>
|
|
#include <Kernel/Process.h>
|
|
#include <Kernel/Sections.h>
|
|
#include <Kernel/TTY/ConsoleManagement.h>
|
|
|
|
namespace Kernel {
|
|
|
|
mode_t SysFSPowerStateSwitchNode::permissions() const
|
|
{
|
|
return S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
|
|
}
|
|
|
|
UNMAP_AFTER_INIT NonnullRefPtr<SysFSPowerStateSwitchNode> SysFSPowerStateSwitchNode::must_create(SysFSDirectory const& parent_directory)
|
|
{
|
|
return adopt_ref_if_nonnull(new (nothrow) SysFSPowerStateSwitchNode(parent_directory)).release_nonnull();
|
|
}
|
|
|
|
UNMAP_AFTER_INIT SysFSPowerStateSwitchNode::SysFSPowerStateSwitchNode(SysFSDirectory const& parent_directory)
|
|
: SysFSComponent(parent_directory)
|
|
{
|
|
}
|
|
|
|
ErrorOr<void> SysFSPowerStateSwitchNode::truncate(u64 size)
|
|
{
|
|
// Note: This node doesn't store any useful data anyway, so we can safely
|
|
// truncate this to zero (essentially ignoring the request without failing).
|
|
if (size != 0)
|
|
return EPERM;
|
|
return {};
|
|
}
|
|
|
|
ErrorOr<size_t> SysFSPowerStateSwitchNode::write_bytes(off_t offset, size_t count, UserOrKernelBuffer const& data, OpenFileDescription*)
|
|
{
|
|
// Note: If we are in a jail, don't let the current process to change the power state.
|
|
if (Process::current().is_currently_in_jail())
|
|
return Error::from_errno(EPERM);
|
|
if (Checked<off_t>::addition_would_overflow(offset, count))
|
|
return Error::from_errno(EOVERFLOW);
|
|
if (offset > 0)
|
|
return Error::from_errno(EINVAL);
|
|
if (count > 1)
|
|
return Error::from_errno(EINVAL);
|
|
char buf[1];
|
|
TRY(data.read(buf, 1));
|
|
switch (buf[0]) {
|
|
case '1':
|
|
reboot();
|
|
VERIFY_NOT_REACHED();
|
|
case '2':
|
|
poweroff();
|
|
VERIFY_NOT_REACHED();
|
|
default:
|
|
return Error::from_errno(EINVAL);
|
|
}
|
|
}
|
|
|
|
void SysFSPowerStateSwitchNode::reboot()
|
|
{
|
|
MutexLocker locker(Process::current().big_lock());
|
|
|
|
dbgln("acquiring FS locks...");
|
|
FileSystem::lock_all();
|
|
dbgln("syncing mounted filesystems...");
|
|
FileSystem::sync();
|
|
dbgln("attempting reboot via ACPI");
|
|
if (ACPI::is_enabled())
|
|
ACPI::Parser::the()->try_acpi_reboot();
|
|
#if ARCH(X86_64)
|
|
i8042_reboot();
|
|
#endif
|
|
dbgln("reboot attempts failed, applications will stop responding.");
|
|
dmesgln("Reboot can't be completed. It's safe to turn off the computer!");
|
|
Processor::halt();
|
|
}
|
|
|
|
void SysFSPowerStateSwitchNode::poweroff()
|
|
{
|
|
MutexLocker locker(Process::current().big_lock());
|
|
|
|
ConsoleManagement::the().switch_to_debug();
|
|
|
|
dbgln("acquiring FS locks...");
|
|
FileSystem::lock_all();
|
|
dbgln("syncing mounted filesystems...");
|
|
FileSystem::sync();
|
|
dbgln("attempting system shutdown...");
|
|
#if ARCH(X86_64)
|
|
qemu_shutdown();
|
|
virtualbox_shutdown();
|
|
#endif
|
|
dbgln("shutdown attempts failed, applications will stop responding.");
|
|
dmesgln("Shutdown can't be completed. It's safe to turn off the computer!");
|
|
Processor::halt();
|
|
}
|
|
|
|
}
|