mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-25 17:10:23 +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.
86 lines
2.4 KiB
C++
86 lines
2.4 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/Singleton.h>
|
|
#include <Kernel/Devices/Device.h>
|
|
#include <Kernel/Devices/DeviceManagement.h>
|
|
#include <Kernel/FileSystem/InodeMetadata.h>
|
|
#include <Kernel/FileSystem/SysFS/Component.h>
|
|
#include <Kernel/FileSystem/SysFS/Subsystems/DeviceIdentifiers/BlockDevicesDirectory.h>
|
|
#include <Kernel/FileSystem/SysFS/Subsystems/DeviceIdentifiers/CharacterDevicesDirectory.h>
|
|
#include <Kernel/Sections.h>
|
|
|
|
namespace Kernel {
|
|
|
|
Device::Device(MajorNumber major, MinorNumber minor)
|
|
: m_major(major)
|
|
, m_minor(minor)
|
|
{
|
|
}
|
|
|
|
void Device::before_will_be_destroyed_remove_from_device_management()
|
|
{
|
|
DeviceManagement::the().before_device_removal({}, *this);
|
|
m_state = State::BeingRemoved;
|
|
}
|
|
|
|
void Device::after_inserting_add_to_device_management()
|
|
{
|
|
DeviceManagement::the().after_inserting_device({}, *this);
|
|
}
|
|
|
|
ErrorOr<void> Device::after_inserting()
|
|
{
|
|
VERIFY(!m_sysfs_component);
|
|
auto sys_fs_component = SysFSDeviceComponent::must_create(*this);
|
|
m_sysfs_component = sys_fs_component;
|
|
after_inserting_add_to_device_identifier_directory();
|
|
after_inserting_add_to_device_management();
|
|
return {};
|
|
}
|
|
|
|
void Device::will_be_destroyed()
|
|
{
|
|
VERIFY(m_sysfs_component);
|
|
before_will_be_destroyed_remove_from_device_management();
|
|
before_will_be_destroyed_remove_from_device_identifier_directory();
|
|
}
|
|
|
|
Device::~Device()
|
|
{
|
|
VERIFY(m_state == State::BeingRemoved);
|
|
}
|
|
|
|
ErrorOr<NonnullOwnPtr<KString>> Device::pseudo_path(OpenFileDescription const&) const
|
|
{
|
|
return KString::formatted("device:{},{}", major(), minor());
|
|
}
|
|
|
|
ErrorOr<NonnullRefPtr<OpenFileDescription>> Device::open(int options)
|
|
{
|
|
TRY(Process::current().jail().with([&](auto const& my_jail) -> ErrorOr<void> {
|
|
if (my_jail && !is_openable_by_jailed_processes())
|
|
return Error::from_errno(EPERM);
|
|
return {};
|
|
}));
|
|
return File::open(options);
|
|
}
|
|
|
|
void Device::process_next_queued_request(Badge<AsyncDeviceRequest>, AsyncDeviceRequest const& completed_request)
|
|
{
|
|
SpinlockLocker lock(m_requests_lock);
|
|
VERIFY(!m_requests.is_empty());
|
|
VERIFY(m_requests.first().ptr() == &completed_request);
|
|
m_requests.remove(m_requests.begin());
|
|
if (!m_requests.is_empty()) {
|
|
auto* next_request = m_requests.first().ptr();
|
|
next_request->do_start(move(lock));
|
|
}
|
|
|
|
evaluate_block_conditions();
|
|
}
|
|
|
|
}
|