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Kernel/SysFS: Prevent allocation for component name during construction

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

View file

@ -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