130 lines
4.1 KiB
C++
130 lines
4.1 KiB
C++
#pragma once
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#include <BAN/Iteration.h>
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#include <BAN/Optional.h>
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#include <kernel/FS/Inode.h>
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#include <kernel/FS/TmpFS/Definitions.h>
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namespace Kernel
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{
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namespace TmpFuncs
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{
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template<typename F>
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concept for_each_valid_entry_callback = requires(F func, TmpDirectoryEntry& entry)
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{
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requires BAN::is_same_v<decltype(func(entry)), BAN::Iteration>;
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};
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}
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class TmpFileSystem;
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class TmpInode : public Inode
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{
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public:
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virtual ino_t ino() const override final { return m_ino; }
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virtual Mode mode() const override final { return Mode(m_inode_info.mode); }
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virtual nlink_t nlink() const override final { return m_inode_info.nlink; }
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virtual uid_t uid() const override { return m_inode_info.uid; }
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virtual gid_t gid() const override { return m_inode_info.gid; }
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virtual off_t size() const override final { return m_inode_info.size; }
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virtual timespec atime() const override final { return m_inode_info.atime; }
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virtual timespec mtime() const override final { return m_inode_info.mtime; }
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virtual timespec ctime() const override final { return m_inode_info.ctime; }
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virtual blksize_t blksize() const override final { return PAGE_SIZE; }
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virtual blkcnt_t blocks() const override final { return m_inode_info.blocks; }
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virtual dev_t dev() const override { return 0; } // TODO
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virtual dev_t rdev() const override { return 0; } // TODO
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public:
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static BAN::ErrorOr<BAN::RefPtr<TmpInode>> create_from_existing(TmpFileSystem&, ino_t, const TmpInodeInfo&);
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~TmpInode();
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protected:
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TmpInode(TmpFileSystem&, ino_t, const TmpInodeInfo&);
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void sync();
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void free_all_blocks();
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virtual BAN::ErrorOr<void> prepare_unlink() { return {}; };
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BAN::Optional<size_t> block_index(size_t data_block_index);
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BAN::ErrorOr<size_t> block_index_with_allocation(size_t data_block_index);
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protected:
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TmpFileSystem& m_fs;
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TmpInodeInfo m_inode_info;
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const ino_t m_ino;
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// has to be able to increase link count
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friend class TmpDirectoryInode;
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};
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class TmpFileInode : public TmpInode
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{
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public:
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static BAN::ErrorOr<BAN::RefPtr<TmpFileInode>> create_new(TmpFileSystem&, mode_t, uid_t, gid_t);
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~TmpFileInode();
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protected:
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virtual BAN::ErrorOr<size_t> read_impl(off_t, BAN::ByteSpan) override;
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virtual BAN::ErrorOr<size_t> write_impl(off_t, BAN::ConstByteSpan) override;
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virtual BAN::ErrorOr<void> truncate_impl(size_t) override;
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virtual BAN::ErrorOr<void> chmod_impl(mode_t) override;
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virtual bool has_data_impl() const override { return true; }
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private:
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TmpFileInode(TmpFileSystem&, ino_t, const TmpInodeInfo&);
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friend class TmpInode;
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};
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class TmpSymlinkInode : public TmpInode
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{
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public:
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static BAN::ErrorOr<BAN::RefPtr<TmpSymlinkInode>> create_new(TmpFileSystem&, mode_t, uid_t, gid_t, BAN::StringView target);
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~TmpSymlinkInode();
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BAN::ErrorOr<void> set_link_target(BAN::StringView);
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protected:
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virtual BAN::ErrorOr<BAN::String> link_target_impl() override;
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private:
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TmpSymlinkInode(TmpFileSystem&, ino_t, const TmpInodeInfo&);
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};
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class TmpDirectoryInode : public TmpInode
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{
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public:
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static BAN::ErrorOr<BAN::RefPtr<TmpDirectoryInode>> create_root(TmpFileSystem&, mode_t, uid_t, gid_t);
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static BAN::ErrorOr<BAN::RefPtr<TmpDirectoryInode>> create_new(TmpFileSystem&, mode_t, uid_t, gid_t, TmpInode& parent);
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~TmpDirectoryInode();
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BAN::ErrorOr<void> link_inode(TmpInode&, BAN::StringView);
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protected:
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TmpDirectoryInode(TmpFileSystem&, ino_t, const TmpInodeInfo&);
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virtual BAN::ErrorOr<void> prepare_unlink() override;
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protected:
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virtual BAN::ErrorOr<BAN::RefPtr<Inode>> find_inode_impl(BAN::StringView) override final;
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virtual BAN::ErrorOr<void> list_next_inodes_impl(off_t, DirectoryEntryList*, size_t) override final;
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virtual BAN::ErrorOr<void> create_file_impl(BAN::StringView, mode_t, uid_t, gid_t) override final;
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virtual BAN::ErrorOr<void> create_directory_impl(BAN::StringView, mode_t, uid_t, gid_t) override final;
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virtual BAN::ErrorOr<void> unlink_impl(BAN::StringView) override;
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private:
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template<TmpFuncs::for_each_valid_entry_callback F>
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void for_each_valid_entry(F callback);
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friend class TmpInode;
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};
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TmpInodeInfo create_inode_info(mode_t mode, uid_t uid, gid_t gid);
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}
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