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#pragma once
#include <AK/HashMap.h>
#include <Kernel/FileSystem/FileSystem.h>
#include <Kernel/FileSystem/Inode.h>
#include <Kernel/UnixTypes.h>
class SynthFSInode;
class SynthFS : public FS {
public:
virtual ~SynthFS() override;
static Retained<SynthFS> create();
virtual bool initialize() override;
virtual const char* class_name() const override;
virtual InodeIdentifier root_inode() const override;
virtual RetainPtr<Inode> create_inode(InodeIdentifier parentInode, const String& name, mode_t, off_t size, dev_t, int& error) override;
virtual RetainPtr<Inode> create_directory(InodeIdentifier parentInode, const String& name, mode_t, int& error) override;
virtual RetainPtr<Inode> get_inode(InodeIdentifier) const override;
protected:
typedef unsigned InodeIndex;
InodeIndex generate_inode_index();
static constexpr InodeIndex RootInodeIndex = 1;
SynthFS();
Retained<SynthFSInode> create_directory(String&& name);
Retained<SynthFSInode> create_text_file(String&& name, ByteBuffer&&, mode_t = 0010644);
Retained<SynthFSInode> create_generated_file(String&& name, Function<ByteBuffer(SynthFSInode&)>&&, mode_t = 0100644);
Retained<SynthFSInode> create_generated_file(String&& name, Function<ByteBuffer(SynthFSInode&)>&&, Function<ssize_t(SynthFSInode&, const ByteBuffer&)>&&, mode_t = 0100644);
InodeIdentifier add_file(RetainPtr<SynthFSInode>&&, InodeIndex parent = RootInodeIndex);
bool remove_file(InodeIndex);
private:
InodeIndex m_next_inode_index { 2 };
HashMap<InodeIndex, RetainPtr<SynthFSInode>> m_inodes;
};
struct SynthFSInodeCustomData {
virtual ~SynthFSInodeCustomData();
};
class SynthFSInode final : public Inode {
friend class SynthFS;
friend class DevPtsFS;
public:
virtual ~SynthFSInode() override;
void set_custom_data(OwnPtr<SynthFSInodeCustomData>&& custom_data) { m_custom_data = move(custom_data); }
SynthFSInodeCustomData* custom_data() { return m_custom_data.ptr(); }
const SynthFSInodeCustomData* custom_data() const { return m_custom_data.ptr(); }
private:
// ^Inode
virtual ssize_t read_bytes(off_t, ssize_t, byte* buffer, FileDescriptor*) const override;
virtual InodeMetadata metadata() const override;
virtual bool traverse_as_directory(Function<bool(const FS::DirectoryEntry&)>) const override;
virtual InodeIdentifier lookup(const String& name) override;
virtual String reverse_lookup(InodeIdentifier) override;
virtual void flush_metadata() override;
virtual ssize_t write_bytes(off_t, ssize_t, const byte* buffer, FileDescriptor*) override;
virtual KResult add_child(InodeIdentifier child_id, const String& name, byte file_type) override;
virtual KResult remove_child(const String& name) override;
virtual RetainPtr<Inode> parent() const override;
virtual size_t directory_entry_count() const override;
virtual KResult chmod(mode_t) override;
virtual KResult chown(uid_t, gid_t) override;
SynthFS& fs();
const SynthFS& fs() const;
SynthFSInode(SynthFS&, unsigned index);
String m_name;
InodeIdentifier m_parent;
ByteBuffer m_data;
Function<ByteBuffer(SynthFSInode&)> m_generator;
Function<ssize_t(SynthFSInode&, const ByteBuffer&)> m_write_callback;
Vector<SynthFSInode*> m_children;
InodeMetadata m_metadata;
OwnPtr<SynthFSInodeCustomData> m_custom_data;
};
inline SynthFS& SynthFSInode::fs()
{
return static_cast<SynthFS&>(Inode::fs());
}
inline const SynthFS& SynthFSInode::fs() const
{
return static_cast<const SynthFS&>(Inode::fs());
}
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