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#pragma once
#include <AK/String.h>
#include <AK/Function.h>
#include <AK/InlineLinkedList.h>
#include <AK/RefCounted.h>
#include <AK/WeakPtr.h>
#include <Kernel/FileSystem/FileSystem.h>
#include <Kernel/FileSystem/InodeIdentifier.h>
#include <Kernel/FileSystem/InodeMetadata.h>
#include <Kernel/KResult.h>
#include <Kernel/Lock.h>
class FileDescription;
class InodeVMObject;
class InodeWatcher;
class LocalSocket;
class Inode : public RefCounted<Inode>
, public Weakable<Inode>
, public InlineLinkedListNode<Inode> {
friend class VFS;
friend class FS;
public:
virtual ~Inode();
virtual void one_ref_left() {}
FS& fs() { return m_fs; }
const FS& fs() const { return m_fs; }
unsigned fsid() const;
unsigned index() const { return m_index; }
size_t size() const { return metadata().size; }
bool is_symlink() const { return metadata().is_symlink(); }
bool is_directory() const { return metadata().is_directory(); }
bool is_character_device() const { return metadata().is_character_device(); }
mode_t mode() const { return metadata().mode; }
InodeIdentifier identifier() const { return { fsid(), index() }; }
virtual InodeMetadata metadata() const = 0;
ByteBuffer read_entire(FileDescription* = nullptr) const;
virtual ssize_t read_bytes(off_t, ssize_t, u8* buffer, FileDescription*) const = 0;
virtual bool traverse_as_directory(Function<bool(const FS::DirectoryEntry&)>) const = 0;
virtual InodeIdentifier lookup(StringView name) = 0;
virtual ssize_t write_bytes(off_t, ssize_t, const u8* data, FileDescription*) = 0;
virtual KResult add_child(InodeIdentifier child_id, const StringView& name, mode_t) = 0;
virtual KResult remove_child(const StringView& name) = 0;
virtual size_t directory_entry_count() const = 0;
virtual KResult chmod(mode_t) = 0;
virtual KResult chown(uid_t, gid_t) = 0;
virtual KResult truncate(off_t) { return KSuccess; }
LocalSocket* socket() { return m_socket.ptr(); }
const LocalSocket* socket() const { return m_socket.ptr(); }
bool bind_socket(LocalSocket&);
bool unbind_socket();
bool is_metadata_dirty() const { return m_metadata_dirty; }
virtual int set_atime(time_t);
virtual int set_ctime(time_t);
virtual int set_mtime(time_t);
virtual int increment_link_count();
virtual int decrement_link_count();
virtual void flush_metadata() = 0;
void will_be_destroyed();
void set_vmo(VMObject&);
InodeVMObject* vmobject() { return m_vmobject.ptr(); }
const InodeVMObject* vmobject() const { return m_vmobject.ptr(); }
static void sync();
void register_watcher(Badge<InodeWatcher>, InodeWatcher&);
void unregister_watcher(Badge<InodeWatcher>, InodeWatcher&);
// For InlineLinkedListNode.
Inode* m_next { nullptr };
Inode* m_prev { nullptr };
protected:
Inode(FS& fs, unsigned index);
void set_metadata_dirty(bool);
void inode_contents_changed(off_t, ssize_t, const u8*);
void inode_size_changed(size_t old_size, size_t new_size);
mutable Lock m_lock { "Inode" };
private:
FS& m_fs;
unsigned m_index { 0 };
WeakPtr<InodeVMObject> m_vmobject;
RefPtr<LocalSocket> m_socket;
HashTable<InodeWatcher*> m_watchers;
bool m_metadata_dirty { false };
};
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