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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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12
Kernel/FileSystem/SysFS/Component.h
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@ -9,13 +9,13 @@
#include <AK/AtomicRefCounted.h>
#include <AK/Error.h>
#include <AK/Function.h>
#include <AK/RefPtr.h>
#include <AK/StringView.h>
#include <AK/Types.h>
#include <Kernel/FileSystem/File.h>
#include <Kernel/FileSystem/FileSystem.h>
#include <Kernel/FileSystem/OpenFileDescription.h>
#include <Kernel/Forward.h>
#include <Kernel/Library/LockRefPtr.h>
namespace Kernel {
@ -31,7 +31,7 @@ public:
virtual StringView name() const = 0;
virtual ErrorOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const { return Error::from_errno(ENOTIMPL); }
virtual ErrorOr<void> traverse_as_directory(FileSystemID, Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const { VERIFY_NOT_REACHED(); }
virtual LockRefPtr<SysFSComponent> lookup(StringView) { VERIFY_NOT_REACHED(); };
virtual RefPtr<SysFSComponent> lookup(StringView) { VERIFY_NOT_REACHED(); };
virtual mode_t permissions() const;
virtual ErrorOr<void> truncate(u64) { return EPERM; }
virtual size_t size() const { return 0; }
@ -51,9 +51,9 @@ protected:
explicit SysFSComponent(SysFSDirectory const& parent_directory);
SysFSComponent();
LockRefPtr<SysFSDirectory> m_parent_directory;
RefPtr<SysFSDirectory> const m_parent_directory;
IntrusiveListNode<SysFSComponent, NonnullLockRefPtr<SysFSComponent>> m_list_node;
IntrusiveListNode<SysFSComponent, NonnullRefPtr<SysFSComponent>> m_list_node;
private:
InodeIndex m_component_index {};
@ -70,13 +70,13 @@ protected:
explicit SysFSSymbolicLink(SysFSDirectory const& parent_directory, SysFSComponent const& pointed_component);
LockRefPtr<SysFSComponent> m_pointed_component;
NonnullRefPtr<SysFSComponent> const m_pointed_component;
};
class SysFSDirectory : public SysFSComponent {
public:
virtual ErrorOr<void> traverse_as_directory(FileSystemID, Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override final;
virtual LockRefPtr<SysFSComponent> lookup(StringView name) override final;
virtual RefPtr<SysFSComponent> lookup(StringView name) override final;
virtual ErrorOr<NonnullRefPtr<SysFSInode>> to_inode(SysFS const& sysfs_instance) const override final;