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Add CoreInode::lookup() for directory lookups.

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Also add a name-to-inode lookup cache to Ext2Inode. This seems like a great
speedup for filesystem traversal.
This commit is contained in:
Andreas Kling 2018-11-15 16:34:36 +01:00
parent 8fa2d7104a
commit 5f434bc00b
7 changed files with 48 additions and 18 deletions
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5
VirtualFileSystem/FileSystem.h
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@ -53,7 +53,6 @@ public:
virtual RetainPtr<CoreInode> get_inode(InodeIdentifier) const = 0;
InodeIdentifier child_of_directory_inode_with_name(InodeIdentifier, const String& name) const;
ByteBuffer readEntireInode(InodeIdentifier, FileDescriptor* = nullptr) const;
String name_of_child_in_directory(InodeIdentifier parent, InodeIdentifier child) const;
@ -81,10 +80,12 @@ public:
InodeIdentifier identifier() const { return { fsid(), index() }; }
const InodeMetadata& metadata() const { if (!m_metadata.isValid()) { populate_metadata(); } return m_metadata; }
ByteBuffer read_entire(FileDescriptor* = nullptr);
virtual Unix::ssize_t read_bytes(Unix::off_t, Unix::size_t, byte* buffer, FileDescriptor*) = 0;
virtual bool traverse_as_directory(Function<bool(const FileSystem::DirectoryEntry&)>) = 0;
virtual InodeIdentifier lookup(const String& name) = 0;
ByteBuffer read_entire(FileDescriptor* = nullptr);
protected:
CoreInode(FileSystem& fs, unsigned index)