Inode.h 2.8 KB

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  1. /*
  2. * Copyright (c) 2022, Undefine <undefine@undefine.pl>
  3. *
  4. * SPDX-License-Identifier: BSD-2-Clause
  5. */
  6. #pragma once
  7. #include <AK/OwnPtr.h>
  8. #include <AK/RefPtr.h>
  9. #include <Kernel/FileSystem/FATFS/Definitions.h>
  10. #include <Kernel/FileSystem/FATFS/FileSystem.h>
  11. #include <Kernel/FileSystem/Inode.h>
  12. #include <Kernel/KBuffer.h>
  13. #include <Kernel/KString.h>
  14. namespace Kernel {
  15. class FATInode final : public Inode {
  16. friend FATFS;
  17. public:
  18. virtual ~FATInode() override = default;
  19. static ErrorOr<NonnullLockRefPtr<FATInode>> create(FATFS&, FATEntry, Vector<FATLongFileNameEntry> const& = {});
  20. FATFS& fs() { return static_cast<FATFS&>(Inode::fs()); }
  21. FATFS const& fs() const { return static_cast<FATFS const&>(Inode::fs()); }
  22. private:
  23. FATInode(FATFS&, FATEntry, NonnullOwnPtr<KString> filename);
  24. static constexpr u32 no_more_clusters = 0x0FFFFFF8;
  25. static constexpr u32 cluster_number_mask = 0x0FFFFFFF;
  26. static constexpr u8 end_entry_byte = 0x00;
  27. static constexpr u8 unused_entry_byte = 0xE5;
  28. static constexpr u8 lfn_entry_text_termination = 0xFF;
  29. static constexpr u16 first_fat_year = 1980;
  30. static constexpr u8 normal_filename_length = 8;
  31. static constexpr u8 normal_extension_length = 3;
  32. static ErrorOr<NonnullOwnPtr<KString>> compute_filename(FATEntry&, Vector<FATLongFileNameEntry> const& = {});
  33. static StringView byte_terminated_string(StringView, u8);
  34. static time_t fat_date_time(FATPackedDate date, FATPackedTime time);
  35. ErrorOr<Vector<BlockBasedFileSystem::BlockIndex>> compute_block_list();
  36. ErrorOr<NonnullOwnPtr<KBuffer>> read_block_list();
  37. ErrorOr<LockRefPtr<FATInode>> traverse(Function<ErrorOr<bool>(LockRefPtr<FATInode>)> callback);
  38. u32 first_cluster() const;
  39. // ^Inode
  40. virtual ErrorOr<size_t> write_bytes_locked(off_t, size_t, UserOrKernelBuffer const& data, OpenFileDescription*) override;
  41. virtual ErrorOr<size_t> read_bytes_locked(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const override;
  42. virtual InodeMetadata metadata() const override;
  43. virtual ErrorOr<void> traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override;
  44. virtual ErrorOr<NonnullLockRefPtr<Inode>> lookup(StringView name) override;
  45. virtual ErrorOr<NonnullLockRefPtr<Inode>> create_child(StringView name, mode_t, dev_t, UserID, GroupID) override;
  46. virtual ErrorOr<void> add_child(Inode&, StringView name, mode_t) override;
  47. virtual ErrorOr<void> remove_child(StringView name) override;
  48. virtual ErrorOr<void> chmod(mode_t) override;
  49. virtual ErrorOr<void> chown(UserID, GroupID) override;
  50. virtual ErrorOr<void> flush_metadata() override;
  51. Vector<BlockBasedFileSystem::BlockIndex> m_block_list;
  52. FATEntry m_entry;
  53. NonnullOwnPtr<KString> m_filename;
  54. InodeMetadata m_metadata;
  55. };
  56. }