RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 05:57:44 +00:00
Code Issues Activity Actions

Kernel/SysFS: Prevent allocation for component name during construction

Browse source 
Instead, allocate before constructing the object and pass NonnullOwnPtr
of KString to the object if needed. Some classes can determine their
names as they have a known attribute to look for or have a static name.
This commit is contained in:
Liav A 2021-12-12 16:33:08 +02:00 • committed by Andreas Kling
parent 4daf07e69f
commit 478f543899
17 changed files with 116 additions and 65 deletions
Download patch file Download diff file Expand all files Collapse all files

59
Kernel/Bus/PCI/SysFSPCI.cpp
View file

@ -15,21 +15,24 @@ namespace Kernel::PCI {
UNMAP_AFTER_INIT NonnullRefPtr<PCIDeviceSysFSDirectory> PCIDeviceSysFSDirectory::create(const SysFSDirectory& parent_directory, Address address)
{
return adopt_ref(*new (nothrow) PCIDeviceSysFSDirectory(parent_directory, address));
// FIXME: Handle allocation failure gracefully
auto device_name = MUST(KString::try_create(String::formatted("{:04x}:{:02x}:{:02x}.{}", address.domain(), address.bus(), address.device(), address.function())));
return adopt_ref(*new (nothrow) PCIDeviceSysFSDirectory(move(device_name), parent_directory, address));
}
UNMAP_AFTER_INIT PCIDeviceSysFSDirectory::PCIDeviceSysFSDirectory(const SysFSDirectory& parent_directory, Address address)
: SysFSDirectory(String::formatted("{:04x}:{:02x}:{:02x}.{}", address.domain(), address.bus(), address.device(), address.function()), parent_directory)
UNMAP_AFTER_INIT PCIDeviceSysFSDirectory::PCIDeviceSysFSDirectory(NonnullOwnPtr<KString> device_directory_name, const SysFSDirectory& parent_directory, Address address)
: SysFSDirectory(parent_directory)
, m_address(address)
, m_device_directory_name(move(device_directory_name))
{
m_components.append(PCIDeviceAttributeSysFSComponent::create("vendor"sv, *this, PCI::RegisterOffset::VENDOR_ID, 2));
m_components.append(PCIDeviceAttributeSysFSComponent::create("device_id"sv, *this, PCI::RegisterOffset::DEVICE_ID, 2));
m_components.append(PCIDeviceAttributeSysFSComponent::create("class"sv, *this, PCI::RegisterOffset::CLASS, 1));
m_components.append(PCIDeviceAttributeSysFSComponent::create("subclass"sv, *this, PCI::RegisterOffset::SUBCLASS, 1));
m_components.append(PCIDeviceAttributeSysFSComponent::create("revision"sv, *this, PCI::RegisterOffset::REVISION_ID, 1));
m_components.append(PCIDeviceAttributeSysFSComponent::create("progif"sv, *this, PCI::RegisterOffset::PROG_IF, 1));
m_components.append(PCIDeviceAttributeSysFSComponent::create("subsystem_vendor"sv, *this, PCI::RegisterOffset::SUBSYSTEM_VENDOR_ID, 2));
m_components.append(PCIDeviceAttributeSysFSComponent::create("subsystem_id"sv, *this, PCI::RegisterOffset::SUBSYSTEM_ID, 2));
m_components.append(PCIDeviceAttributeSysFSComponent::create(*this, PCI::RegisterOffset::VENDOR_ID, 2));
m_components.append(PCIDeviceAttributeSysFSComponent::create(*this, PCI::RegisterOffset::DEVICE_ID, 2));
m_components.append(PCIDeviceAttributeSysFSComponent::create(*this, PCI::RegisterOffset::CLASS, 1));
m_components.append(PCIDeviceAttributeSysFSComponent::create(*this, PCI::RegisterOffset::SUBCLASS, 1));
m_components.append(PCIDeviceAttributeSysFSComponent::create(*this, PCI::RegisterOffset::REVISION_ID, 1));
m_components.append(PCIDeviceAttributeSysFSComponent::create(*this, PCI::RegisterOffset::PROG_IF, 1));
m_components.append(PCIDeviceAttributeSysFSComponent::create(*this, PCI::RegisterOffset::SUBSYSTEM_VENDOR_ID, 2));
m_components.append(PCIDeviceAttributeSysFSComponent::create(*this, PCI::RegisterOffset::SUBSYSTEM_ID, 2));
}
UNMAP_AFTER_INIT void PCIBusSysFSDirectory::initialize()
@ -39,7 +42,7 @@ UNMAP_AFTER_INIT void PCIBusSysFSDirectory::initialize()
}
UNMAP_AFTER_INIT PCIBusSysFSDirectory::PCIBusSysFSDirectory()
: SysFSDirectory("pci", SysFSComponentRegistry::the().buses_directory())
: SysFSDirectory(SysFSComponentRegistry::the().buses_directory())
{
PCI::enumerate([&](DeviceIdentifier const& device_identifier) {
auto pci_device = PCI::PCIDeviceSysFSDirectory::create(*this, device_identifier.address());
@ -47,13 +50,37 @@ UNMAP_AFTER_INIT PCIBusSysFSDirectory::PCIBusSysFSDirectory()
});
}
NonnullRefPtr<PCIDeviceAttributeSysFSComponent> PCIDeviceAttributeSysFSComponent::create(StringView name, const PCIDeviceSysFSDirectory& device, PCI::RegisterOffset offset, size_t field_bytes_width)
StringView PCIDeviceAttributeSysFSComponent::name() const
{
return adopt_ref(*new (nothrow) PCIDeviceAttributeSysFSComponent(name, device, offset, field_bytes_width));
switch (m_offset) {
case PCI::RegisterOffset::VENDOR_ID:
return "vendor"sv;
case PCI::RegisterOffset::DEVICE_ID:
return "device_id"sv;
case PCI::RegisterOffset::CLASS:
return "class"sv;
case PCI::RegisterOffset::SUBCLASS:
return "subclass"sv;
case PCI::RegisterOffset::REVISION_ID:
return "revision"sv;
case PCI::RegisterOffset::PROG_IF:
return "progif"sv;
case PCI::RegisterOffset::SUBSYSTEM_VENDOR_ID:
return "subsystem_vendor"sv;
case PCI::RegisterOffset::SUBSYSTEM_ID:
return "subsystem_id"sv;
default:
VERIFY_NOT_REACHED();
}
}
PCIDeviceAttributeSysFSComponent::PCIDeviceAttributeSysFSComponent(StringView name, const PCIDeviceSysFSDirectory& device, PCI::RegisterOffset offset, size_t field_bytes_width)
: SysFSComponent(name)
NonnullRefPtr<PCIDeviceAttributeSysFSComponent> PCIDeviceAttributeSysFSComponent::create(const PCIDeviceSysFSDirectory& device, PCI::RegisterOffset offset, size_t field_bytes_width)
{
return adopt_ref(*new (nothrow) PCIDeviceAttributeSysFSComponent(device, offset, field_bytes_width));
}
PCIDeviceAttributeSysFSComponent::PCIDeviceAttributeSysFSComponent(const PCIDeviceSysFSDirectory& device, PCI::RegisterOffset offset, size_t field_bytes_width)
: SysFSComponent()
, m_device(device)
, m_offset(offset)
, m_field_bytes_width(field_bytes_width)