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Kernel: Get rid of *LockRefPtr in the SysFS filesystem code

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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.
This commit is contained in:
Liav A 2023-04-05 13:21:11 +03:00 • committed by Linus Groh
parent dd7633c5f4
commit b02ee664e7
114 changed files with 230 additions and 218 deletions
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4
Kernel/FileSystem/SysFS/Subsystems/Bus/Directory.cpp
View file

@ -10,9 +10,9 @@
namespace Kernel {
UNMAP_AFTER_INIT NonnullLockRefPtr<SysFSBusDirectory> SysFSBusDirectory::must_create(SysFSRootDirectory const& parent_directory)
UNMAP_AFTER_INIT NonnullRefPtr<SysFSBusDirectory> SysFSBusDirectory::must_create(SysFSRootDirectory const& parent_directory)
{
auto directory = adopt_lock_ref(*new (nothrow) SysFSBusDirectory(parent_directory));
auto directory = adopt_ref(*new (nothrow) SysFSBusDirectory(parent_directory));
return directory;
}

2
Kernel/FileSystem/SysFS/Subsystems/Bus/Directory.h
View file

@ -16,7 +16,7 @@ class SysFSBusDirectory : public SysFSDirectory {
public:
virtual StringView name() const override { return "bus"sv; }
static NonnullLockRefPtr<SysFSBusDirectory> must_create(SysFSRootDirectory const&);
static NonnullRefPtr<SysFSBusDirectory> must_create(SysFSRootDirectory const&);
private:
explicit SysFSBusDirectory(SysFSRootDirectory const&);

2
Kernel/FileSystem/SysFS/Subsystems/Bus/PCI/BusDirectory.cpp
View file

@ -15,7 +15,7 @@ namespace Kernel {
UNMAP_AFTER_INIT void PCIBusSysFSDirectory::initialize()
{
auto pci_directory = adopt_lock_ref(*new (nothrow) PCIBusSysFSDirectory());
auto pci_directory = adopt_ref(*new (nothrow) PCIBusSysFSDirectory());
SysFSComponentRegistry::the().register_new_bus_directory(pci_directory);
}

4
Kernel/FileSystem/SysFS/Subsystems/Bus/PCI/DeviceAttribute.cpp
View file

@ -47,9 +47,9 @@ StringView PCIDeviceAttributeSysFSComponent::name() const
}
}
NonnullLockRefPtr<PCIDeviceAttributeSysFSComponent> PCIDeviceAttributeSysFSComponent::create(PCIDeviceSysFSDirectory const& device, PCI::RegisterOffset offset, size_t field_bytes_width)
NonnullRefPtr<PCIDeviceAttributeSysFSComponent> PCIDeviceAttributeSysFSComponent::create(PCIDeviceSysFSDirectory const& device, PCI::RegisterOffset offset, size_t field_bytes_width)
{
return adopt_lock_ref(*new (nothrow) PCIDeviceAttributeSysFSComponent(device, offset, field_bytes_width));
return adopt_ref(*new (nothrow) PCIDeviceAttributeSysFSComponent(device, offset, field_bytes_width));
}
PCIDeviceAttributeSysFSComponent::PCIDeviceAttributeSysFSComponent(PCIDeviceSysFSDirectory const& device, PCI::RegisterOffset offset, size_t field_bytes_width)

4
Kernel/FileSystem/SysFS/Subsystems/Bus/PCI/DeviceAttribute.h
View file

@ -15,7 +15,7 @@ namespace Kernel {
class PCIDeviceAttributeSysFSComponent : public SysFSComponent {
public:
static NonnullLockRefPtr<PCIDeviceAttributeSysFSComponent> create(PCIDeviceSysFSDirectory const& device, PCI::RegisterOffset offset, size_t field_bytes_width);
static NonnullRefPtr<PCIDeviceAttributeSysFSComponent> create(PCIDeviceSysFSDirectory const& device, PCI::RegisterOffset offset, size_t field_bytes_width);
virtual ErrorOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const override;
virtual ~PCIDeviceAttributeSysFSComponent() {};
@ -25,7 +25,7 @@ public:
protected:
ErrorOr<NonnullOwnPtr<KBuffer>> try_to_generate_buffer() const;
PCIDeviceAttributeSysFSComponent(PCIDeviceSysFSDirectory const& device, PCI::RegisterOffset offset, size_t field_bytes_width);
NonnullLockRefPtr<PCIDeviceSysFSDirectory> m_device;
NonnullRefPtr<PCIDeviceSysFSDirectory> m_device;
PCI::RegisterOffset m_offset;
size_t m_field_bytes_width;
};

4
Kernel/FileSystem/SysFS/Subsystems/Bus/PCI/DeviceDirectory.cpp
View file

@ -13,12 +13,12 @@
namespace Kernel {
UNMAP_AFTER_INIT NonnullLockRefPtr<PCIDeviceSysFSDirectory> PCIDeviceSysFSDirectory::create(SysFSDirectory const& parent_directory, PCI::DeviceIdentifier const& device_identifier)
UNMAP_AFTER_INIT NonnullRefPtr<PCIDeviceSysFSDirectory> PCIDeviceSysFSDirectory::create(SysFSDirectory const& parent_directory, PCI::DeviceIdentifier const& device_identifier)
{
// FIXME: Handle allocation failure gracefully
auto& address = device_identifier.address();
auto device_name = MUST(KString::formatted("{:04x}:{:02x}:{:02x}.{}", address.domain(), address.bus(), address.device(), address.function()));
auto directory = adopt_lock_ref(*new (nothrow) PCIDeviceSysFSDirectory(move(device_name), parent_directory, device_identifier));
auto directory = adopt_ref(*new (nothrow) PCIDeviceSysFSDirectory(move(device_name), parent_directory, device_identifier));
MUST(directory->m_child_components.with([&](auto& list) -> ErrorOr<void> {
list.append(PCIDeviceAttributeSysFSComponent::create(*directory, PCI::RegisterOffset::VENDOR_ID, 2));
list.append(PCIDeviceAttributeSysFSComponent::create(*directory, PCI::RegisterOffset::DEVICE_ID, 2));

2
Kernel/FileSystem/SysFS/Subsystems/Bus/PCI/DeviceDirectory.h
View file

@ -15,7 +15,7 @@ namespace Kernel {
class PCIDeviceSysFSDirectory final : public SysFSDirectory {
public:
static NonnullLockRefPtr<PCIDeviceSysFSDirectory> create(SysFSDirectory const&, PCI::DeviceIdentifier const&);
static NonnullRefPtr<PCIDeviceSysFSDirectory> create(SysFSDirectory const&, PCI::DeviceIdentifier const&);
PCI::DeviceIdentifier const& device_identifier() const { return *m_device_identifier; }
virtual StringView name() const override { return m_device_directory_name->view(); }

4
Kernel/FileSystem/SysFS/Subsystems/Bus/PCI/DeviceExpansionROM.cpp
View file

@ -12,10 +12,10 @@
namespace Kernel {
NonnullLockRefPtr<PCIDeviceExpansionROMSysFSComponent> PCIDeviceExpansionROMSysFSComponent::create(PCIDeviceSysFSDirectory const& device)
NonnullRefPtr<PCIDeviceExpansionROMSysFSComponent> PCIDeviceExpansionROMSysFSComponent::create(PCIDeviceSysFSDirectory const& device)
{
auto option_rom_size = PCI::get_expansion_rom_space_size(device.device_identifier());
return adopt_lock_ref(*new (nothrow) PCIDeviceExpansionROMSysFSComponent(device, option_rom_size));
return adopt_ref(*new (nothrow) PCIDeviceExpansionROMSysFSComponent(device, option_rom_size));
}
PCIDeviceExpansionROMSysFSComponent::PCIDeviceExpansionROMSysFSComponent(PCIDeviceSysFSDirectory const& device, size_t option_rom_size)

4
Kernel/FileSystem/SysFS/Subsystems/Bus/PCI/DeviceExpansionROM.h
View file

@ -15,7 +15,7 @@ namespace Kernel {
class PCIDeviceExpansionROMSysFSComponent : public SysFSComponent {
public:
static NonnullLockRefPtr<PCIDeviceExpansionROMSysFSComponent> create(PCIDeviceSysFSDirectory const& device);
static NonnullRefPtr<PCIDeviceExpansionROMSysFSComponent> create(PCIDeviceSysFSDirectory const& device);
virtual ErrorOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const override;
virtual ~PCIDeviceExpansionROMSysFSComponent() {};
@ -25,7 +25,7 @@ public:
protected:
ErrorOr<NonnullOwnPtr<KBuffer>> try_to_generate_buffer(size_t offset_in_rom, size_t count) const;
PCIDeviceExpansionROMSysFSComponent(PCIDeviceSysFSDirectory const& device, size_t option_rom_size);
NonnullLockRefPtr<PCIDeviceSysFSDirectory> m_device;
NonnullRefPtr<PCIDeviceSysFSDirectory> m_device;
size_t const m_option_rom_size { 0 };
};

2
Kernel/FileSystem/SysFS/Subsystems/Bus/USB/BusDirectory.cpp
View file

@ -40,7 +40,7 @@ UNMAP_AFTER_INIT SysFSUSBBusDirectory::SysFSUSBBusDirectory(SysFSBusDirectory& b
UNMAP_AFTER_INIT void SysFSUSBBusDirectory::initialize()
{
auto directory = adopt_lock_ref(*new SysFSUSBBusDirectory(SysFSComponentRegistry::the().buses_directory()));
auto directory = adopt_ref(*new SysFSUSBBusDirectory(SysFSComponentRegistry::the().buses_directory()));
SysFSComponentRegistry::the().register_new_bus_directory(directory);
s_sysfs_usb_bus_directory = directory;
}

4
Kernel/FileSystem/SysFS/Subsystems/Bus/USB/DeviceInformation.cpp
View file

@ -11,10 +11,10 @@
namespace Kernel {
ErrorOr<NonnullLockRefPtr<SysFSUSBDeviceInformation>> SysFSUSBDeviceInformation::create(USB::Device& device)
ErrorOr<NonnullRefPtr<SysFSUSBDeviceInformation>> SysFSUSBDeviceInformation::create(USB::Device& device)
{
auto device_name = TRY(KString::number(device.address()));
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) SysFSUSBDeviceInformation(move(device_name), device));
return adopt_nonnull_ref_or_enomem(new (nothrow) SysFSUSBDeviceInformation(move(device_name), device));
}
SysFSUSBDeviceInformation::SysFSUSBDeviceInformation(NonnullOwnPtr<KString> device_name, USB::Device& device)

4
Kernel/FileSystem/SysFS/Subsystems/Bus/USB/DeviceInformation.h
View file

@ -20,7 +20,7 @@ class SysFSUSBDeviceInformation : public SysFSComponent {
public:
virtual ~SysFSUSBDeviceInformation() override;
static ErrorOr<NonnullLockRefPtr<SysFSUSBDeviceInformation>> create(USB::Device&);
static ErrorOr<NonnullRefPtr<SysFSUSBDeviceInformation>> create(USB::Device&);
virtual StringView name() const override { return m_device_name->view(); }
protected:
@ -28,7 +28,7 @@ protected:
virtual ErrorOr<size_t> read_bytes(off_t offset, size_t count, UserOrKernelBuffer& buffer, OpenFileDescription*) const override;
NonnullLockRefPtr<USB::Device> m_device;
NonnullRefPtr<USB::Device> m_device;
private:
ErrorOr<void> try_generate(KBufferBuilder&);