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Kernel/SysFS: Prevent allocation for component name during construction

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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
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15
Kernel/Devices/Device.cpp
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@ -15,11 +15,14 @@ namespace Kernel {
NonnullRefPtr<SysFSDeviceComponent> SysFSDeviceComponent::must_create(Device const& device)
{
return adopt_ref_if_nonnull(new SysFSDeviceComponent(device)).release_nonnull();
// FIXME: Handle allocation failure gracefully
auto device_name = MUST(KString::try_create(String::formatted("{}:{}", device.major(), device.minor())));
return adopt_ref_if_nonnull(new SysFSDeviceComponent(move(device_name), device)).release_nonnull();
}
SysFSDeviceComponent::SysFSDeviceComponent(Device const& device)
: SysFSComponent(String::formatted("{}:{}", device.major(), device.minor()))
SysFSDeviceComponent::SysFSDeviceComponent(NonnullOwnPtr<KString> major_minor_formatted_device_name, Device const& device)
: SysFSComponent()
, m_block_device(device.is_block_device())
, m_major_minor_formatted_device_name(move(major_minor_formatted_device_name))
{
VERIFY(device.is_block_device() || device.is_character_device());
}
@ -32,7 +35,7 @@ UNMAP_AFTER_INIT NonnullRefPtr<SysFSDevicesDirectory> SysFSDevicesDirectory::mus
return devices_directory;
}
SysFSDevicesDirectory::SysFSDevicesDirectory(SysFSRootDirectory const& root_directory)
: SysFSDirectory("dev"sv, root_directory)
: SysFSDirectory(root_directory)
{
}
@ -41,7 +44,7 @@ NonnullRefPtr<SysFSBlockDevicesDirectory> SysFSBlockDevicesDirectory::must_creat
return adopt_ref_if_nonnull(new SysFSBlockDevicesDirectory(devices_directory)).release_nonnull();
}
SysFSBlockDevicesDirectory::SysFSBlockDevicesDirectory(SysFSDevicesDirectory const& devices_directory)
: SysFSDirectory("block"sv, devices_directory)
: SysFSDirectory(devices_directory)
{
}
@ -79,7 +82,7 @@ NonnullRefPtr<SysFSCharacterDevicesDirectory> SysFSCharacterDevicesDirectory::mu
return adopt_ref_if_nonnull(new SysFSCharacterDevicesDirectory(devices_directory)).release_nonnull();
}
SysFSCharacterDevicesDirectory::SysFSCharacterDevicesDirectory(SysFSDevicesDirectory const& devices_directory)
: SysFSDirectory("char"sv, devices_directory)
: SysFSDirectory(devices_directory)
{
}
ErrorOr<void> SysFSCharacterDevicesDirectory::traverse_as_directory(FileSystemID fsid, Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)> callback) const