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Kernel: Replace KResult and KResultOr<T> with Error and ErrorOr<T>

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We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace!
This was a slightly tedious refactoring that took a long time, so it's
not unlikely that some bugs crept in.

Nevertheless, it does pass basic functionality testing, and it's just
real nice to finally see the same pattern in all contexts. :^)
This commit is contained in:
Andreas Kling 2021-11-08 00:51:39 +01:00
parent 7ee10c6926
commit 79fa9765ca
262 changed files with 2415 additions and 2600 deletions
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82
Kernel/FileSystem/Ext2FileSystem.h
View file

@ -38,34 +38,34 @@ public:
private:
// ^Inode
virtual KResultOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const override;
virtual ErrorOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const override;
virtual InodeMetadata metadata() const override;
virtual KResult traverse_as_directory(Function<bool(FileSystem::DirectoryEntryView const&)>) const override;
virtual KResultOr<NonnullRefPtr<Inode>> lookup(StringView name) override;
virtual KResult flush_metadata() override;
virtual KResultOr<size_t> write_bytes(off_t, size_t, const UserOrKernelBuffer& data, OpenFileDescription*) override;
virtual KResultOr<NonnullRefPtr<Inode>> create_child(StringView name, mode_t, dev_t, UserID, GroupID) override;
virtual KResult add_child(Inode& child, const StringView& name, mode_t) override;
virtual KResult remove_child(const StringView& name) override;
virtual KResult set_atime(time_t) override;
virtual KResult set_ctime(time_t) override;
virtual KResult set_mtime(time_t) override;
virtual KResult increment_link_count() override;
virtual KResult decrement_link_count() override;
virtual KResult chmod(mode_t) override;
virtual KResult chown(UserID, GroupID) override;
virtual KResult truncate(u64) override;
virtual KResultOr<int> get_block_address(int) override;
virtual ErrorOr<void> traverse_as_directory(Function<bool(FileSystem::DirectoryEntryView const&)>) const override;
virtual ErrorOr<NonnullRefPtr<Inode>> lookup(StringView name) override;
virtual ErrorOr<void> flush_metadata() override;
virtual ErrorOr<size_t> write_bytes(off_t, size_t, const UserOrKernelBuffer& data, OpenFileDescription*) override;
virtual ErrorOr<NonnullRefPtr<Inode>> create_child(StringView name, mode_t, dev_t, UserID, GroupID) override;
virtual ErrorOr<void> add_child(Inode& child, const StringView& name, mode_t) override;
virtual ErrorOr<void> remove_child(const StringView& name) override;
virtual ErrorOr<void> set_atime(time_t) override;
virtual ErrorOr<void> set_ctime(time_t) override;
virtual ErrorOr<void> set_mtime(time_t) override;
virtual ErrorOr<void> increment_link_count() override;
virtual ErrorOr<void> decrement_link_count() override;
virtual ErrorOr<void> chmod(mode_t) override;
virtual ErrorOr<void> chown(UserID, GroupID) override;
virtual ErrorOr<void> truncate(u64) override;
virtual ErrorOr<int> get_block_address(int) override;
KResult write_directory(Vector<Ext2FSDirectoryEntry>&);
KResult populate_lookup_cache() const;
KResult resize(u64);
KResult write_indirect_block(BlockBasedFileSystem::BlockIndex, Span<BlockBasedFileSystem::BlockIndex>);
KResult grow_doubly_indirect_block(BlockBasedFileSystem::BlockIndex, size_t, Span<BlockBasedFileSystem::BlockIndex>, Vector<BlockBasedFileSystem::BlockIndex>&, unsigned&);
KResult shrink_doubly_indirect_block(BlockBasedFileSystem::BlockIndex, size_t, size_t, unsigned&);
KResult grow_triply_indirect_block(BlockBasedFileSystem::BlockIndex, size_t, Span<BlockBasedFileSystem::BlockIndex>, Vector<BlockBasedFileSystem::BlockIndex>&, unsigned&);
KResult shrink_triply_indirect_block(BlockBasedFileSystem::BlockIndex, size_t, size_t, unsigned&);
KResult flush_block_list();
ErrorOr<void> write_directory(Vector<Ext2FSDirectoryEntry>&);
ErrorOr<void> populate_lookup_cache() const;
ErrorOr<void> resize(u64);
ErrorOr<void> write_indirect_block(BlockBasedFileSystem::BlockIndex, Span<BlockBasedFileSystem::BlockIndex>);
ErrorOr<void> grow_doubly_indirect_block(BlockBasedFileSystem::BlockIndex, size_t, Span<BlockBasedFileSystem::BlockIndex>, Vector<BlockBasedFileSystem::BlockIndex>&, unsigned&);
ErrorOr<void> shrink_doubly_indirect_block(BlockBasedFileSystem::BlockIndex, size_t, size_t, unsigned&);
ErrorOr<void> grow_triply_indirect_block(BlockBasedFileSystem::BlockIndex, size_t, Span<BlockBasedFileSystem::BlockIndex>, Vector<BlockBasedFileSystem::BlockIndex>&, unsigned&);
ErrorOr<void> shrink_triply_indirect_block(BlockBasedFileSystem::BlockIndex, size_t, size_t, unsigned&);
ErrorOr<void> flush_block_list();
Vector<BlockBasedFileSystem::BlockIndex> compute_block_list() const;
Vector<BlockBasedFileSystem::BlockIndex> compute_block_list_with_meta_blocks() const;
Vector<BlockBasedFileSystem::BlockIndex> compute_block_list_impl(bool include_block_list_blocks) const;
@ -89,17 +89,17 @@ public:
FileSize64bits = 1 << 1,
};
static KResultOr<NonnullRefPtr<Ext2FS>> try_create(OpenFileDescription&);
static ErrorOr<NonnullRefPtr<Ext2FS>> try_create(OpenFileDescription&);
virtual ~Ext2FS() override;
virtual KResult initialize() override;
virtual ErrorOr<void> initialize() override;
virtual unsigned total_block_count() const override;
virtual unsigned free_block_count() const override;
virtual unsigned total_inode_count() const override;
virtual unsigned free_inode_count() const override;
virtual KResult prepare_to_unmount() override;
virtual ErrorOr<void> prepare_to_unmount() override;
virtual bool supports_watchers() const override { return true; }
@ -122,30 +122,30 @@ private:
u64 blocks_per_group() const;
u64 inode_size() const;
KResult write_ext2_inode(InodeIndex, ext2_inode const&);
ErrorOr<void> write_ext2_inode(InodeIndex, ext2_inode const&);
bool find_block_containing_inode(InodeIndex, BlockIndex& block_index, unsigned& offset) const;
bool flush_super_block();
virtual StringView class_name() const override { return "Ext2FS"sv; }
virtual Ext2FSInode& root_inode() override;
KResultOr<NonnullRefPtr<Inode>> get_inode(InodeIdentifier) const;
KResultOr<NonnullRefPtr<Inode>> create_inode(Ext2FSInode& parent_inode, StringView name, mode_t, dev_t, UserID, GroupID);
KResult create_directory(Ext2FSInode& parent_inode, StringView name, mode_t, UserID, GroupID);
ErrorOr<NonnullRefPtr<Inode>> get_inode(InodeIdentifier) const;
ErrorOr<NonnullRefPtr<Inode>> create_inode(Ext2FSInode& parent_inode, StringView name, mode_t, dev_t, UserID, GroupID);
ErrorOr<NonnullRefPtr<Inode>> create_directory(Ext2FSInode& parent_inode, StringView name, mode_t, UserID, GroupID);
virtual void flush_writes() override;
BlockIndex first_block_index() const;
KResultOr<InodeIndex> allocate_inode(GroupIndex preferred_group = 0);
KResultOr<Vector<BlockIndex>> allocate_blocks(GroupIndex preferred_group_index, size_t count);
ErrorOr<InodeIndex> allocate_inode(GroupIndex preferred_group = 0);
ErrorOr<Vector<BlockIndex>> allocate_blocks(GroupIndex preferred_group_index, size_t count);
GroupIndex group_index_from_inode(InodeIndex) const;
GroupIndex group_index_from_block_index(BlockIndex) const;
KResultOr<bool> get_inode_allocation_state(InodeIndex) const;
KResult set_inode_allocation_state(InodeIndex, bool);
KResult set_block_allocation_state(BlockIndex, bool);
ErrorOr<bool> get_inode_allocation_state(InodeIndex) const;
ErrorOr<void> set_inode_allocation_state(InodeIndex, bool);
ErrorOr<void> set_block_allocation_state(BlockIndex, bool);
void uncache_inode(InodeIndex);
KResult free_inode(Ext2FSInode&);
ErrorOr<void> free_inode(Ext2FSInode&);
struct BlockListShape {
unsigned direct_blocks { 0 };
@ -179,8 +179,8 @@ private:
BitmapView bitmap(u32 blocks_per_group) { return BitmapView { buffer->data(), blocks_per_group }; }
};
KResultOr<CachedBitmap*> get_bitmap_block(BlockIndex);
KResult update_bitmap_block(BlockIndex bitmap_block, size_t bit_index, bool new_state, u32& super_block_counter, u16& group_descriptor_counter);
ErrorOr<CachedBitmap*> get_bitmap_block(BlockIndex);
ErrorOr<void> update_bitmap_block(BlockIndex bitmap_block, size_t bit_index, bool new_state, u32& super_block_counter, u16& group_descriptor_counter);
Vector<OwnPtr<CachedBitmap>> m_cached_bitmaps;
RefPtr<Ext2FSInode> m_root_inode;