forked from Bananymous/banan-os
263 lines
4.8 KiB
C++
263 lines
4.8 KiB
C++
#pragma once
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#include <stdint.h>
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namespace Kernel::Ext2
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{
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struct Superblock
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{
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uint32_t inodes_count;
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uint32_t blocks_count;
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uint32_t r_blocks_count;
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uint32_t free_blocks_count;
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uint32_t free_inodes_count;
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uint32_t first_data_block;
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uint32_t log_block_size;
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uint32_t log_frag_size;
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uint32_t blocks_per_group;
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uint32_t frags_per_group;
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uint32_t inodes_per_group;
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uint32_t mtime;
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uint32_t wtime;
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uint16_t mnt_count;
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uint16_t max_mnt_count;
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uint16_t magic;
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uint16_t state;
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uint16_t errors;
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uint16_t minor_rev_level;
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uint32_t lastcheck;
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uint32_t checkinterval;
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uint32_t creator_os;
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uint32_t rev_level;
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uint16_t def_resuid;
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uint16_t def_resgid;
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// -- EXT2_DYNAMIC_REV Specific --
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uint8_t __extension_start[0];
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uint32_t first_ino;
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uint16_t inode_size;
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uint16_t block_group_nr;
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uint32_t feature_compat;
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uint32_t feature_incompat;
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uint32_t feature_ro_compat;
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uint8_t uuid[16];
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uint8_t volume_name[16];
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char last_mounted[64];
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uint32_t algo_bitmap;
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// -- Performance Hints --
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uint8_t s_prealloc_blocks;
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uint8_t s_prealloc_dir_blocks;
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uint16_t __alignment;
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// -- Journaling Support --
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uint8_t journal_uuid[16];
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uint32_t journal_inum;
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uint32_t journal_dev;
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uint32_t last_orphan;
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// -- Directory Indexing Support --
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uint32_t hash_seed[4];
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uint8_t def_hash_version;
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uint8_t __padding[3];
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// -- Other options --
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uint32_t default_mount_options;
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uint32_t first_meta_bg;
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};
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struct BlockGroupDescriptor
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{
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uint32_t block_bitmap;
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uint32_t inode_bitmap;
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uint32_t inode_table;
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uint16_t free_blocks_count;
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uint16_t free_inodes_count;
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uint16_t used_dirs_count;
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uint8_t __padding[2];
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uint8_t __reserved[12];
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};
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struct Inode
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{
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uint16_t mode;
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uint16_t uid;
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uint32_t size;
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uint32_t atime;
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uint32_t ctime;
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uint32_t mtime;
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uint32_t dtime;
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uint16_t gid;
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uint16_t links_count;
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uint32_t blocks;
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uint32_t flags;
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uint32_t osd1;
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uint32_t block[15];
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uint32_t generation;
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uint32_t file_acl;
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uint32_t dir_acl;
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uint32_t faddr;
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uint32_t osd2[3];
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};
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struct LinkedDirectoryEntry
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{
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uint32_t inode;
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uint16_t rec_len;
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uint8_t name_len;
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uint8_t file_type;
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char name[0];
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};
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namespace Enum
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{
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constexpr uint16_t SUPER_MAGIC = 0xEF53;
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enum State
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{
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VALID_FS = 1,
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ERROR_FS = 2,
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};
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enum Errors
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{
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ERRORS_CONTINUE = 1,
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ERRORS_RO = 2,
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ERRORS_PANIC = 3,
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};
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enum CreatorOS
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{
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OS_LINUX = 0,
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OS_HURD = 1,
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OS_MASIX = 2,
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OS_FREEBSD = 3,
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OS_LITES = 4,
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};
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enum RevLevel
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{
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GOOD_OLD_REV = 0,
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DYNAMIC_REV = 1,
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};
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enum Rev0Constant
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{
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GOOD_OLD_FIRST_INO = 11,
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GOOD_OLD_INODE_SIZE = 128,
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};
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enum FeatureCompat
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{
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FEATURE_COMPAT_DIR_PREALLOC = 0x0001,
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FEATURE_COMPAT_IMAGIC_INODES = 0x0002,
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FEATURE_COMPAT_HAS_JOURNAL = 0x0004,
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FEATURE_COMPAT_EXT_ATTR = 0x0008,
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FEATURE_COMPAT_RESIZE_INO = 0x0010,
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FEATURE_COMPAT_DIR_INDEX = 0x0020,
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};
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enum FeaturesIncompat
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{
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FEATURE_INCOMPAT_COMPRESSION = 0x0001,
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FEATURE_INCOMPAT_FILETYPE = 0x0002,
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FEATURE_INCOMPAT_RECOVER = 0x0004,
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FEATURE_INCOMPAT_JOURNAL_DEV = 0x0008,
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FEATURE_INCOMPAT_META_BG = 0x0010,
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};
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enum FeaturesRoCompat
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{
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FEATURE_RO_COMPAT_SPARSE_SUPER = 0x0001,
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FEATURE_RO_COMPAT_LARGE_FILE = 0x0002,
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FEATURE_RO_COMPAT_BTREE_DIR = 0x0004,
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};
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enum AlgoBitmap
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{
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LZV1_ALG = 0,
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LZRW3A_ALG = 1,
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GZIP_ALG = 2,
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BZIP2_ALG = 3,
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LZO_ALG = 4,
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};
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enum ReservedInodes
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{
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BAD_INO = 1,
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ROOT_INO = 2,
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ACL_IDX_INO = 3,
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ACL_DATA_INO = 4,
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BOOT_LOADER_INO = 5,
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UNDEL_DIR_INO = 6,
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};
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enum InodeMode
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{
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// -- file format --
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IFSOCK = 0xC000,
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IFLNK = 0xA000,
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IFREG = 0x8000,
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IFBLK = 0x6000,
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IFDIR = 0x4000,
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IFCHR = 0x2000,
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IFIFO = 0x1000,
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// -- process execution user/group override --
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ISUID = 0x0800,
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ISGID = 0x0400,
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ISVTX = 0x0200,
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// -- access rights --
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IRUSR = 0x0100,
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IWUSR = 0x0080,
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IXUSR = 0x0040,
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IRGRP = 0x0020,
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IWGRP = 0x0010,
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IXGRP = 0x0008,
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IROTH = 0x0004,
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IWOTH = 0x0002,
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IXOTH = 0x0001,
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};
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enum InodeFlags
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{
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SECRM_FL = 0x00000001,
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UNRM_FL = 0x00000002,
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COMPR_FL = 0x00000004,
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SYNC_FL = 0x00000008,
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IMMUTABLE_FL = 0x00000010,
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APPEND_FL = 0x00000020,
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NODUMP_FL = 0x00000040,
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NOATIME_FL = 0x00000080,
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// -- Reserved for compression usage --
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DIRTY_FL = 0x00000100,
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COMPRBLK_FL = 0x00000200,
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NOCOMPR_FL = 0x00000400,
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ECOMPR_FL = 0x00000800,
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// -- End of compression flags --
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BTREE_FL = 0x00001000,
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INDEX_FL = 0x00001000,
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IMAGIC_FL = 0x00002000,
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JOURNAL_DATA_FL = 0x00004000,
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RESERVED_FL = 0x80000000,
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};
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enum FileType
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{
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UNKNOWN = 0,
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REG_FILE = 1,
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DIR = 2,
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CHRDEV = 3,
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BLKDEV = 4,
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FIFO = 5,
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SOCK = 6,
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SYMLINK = 7,
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};
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}
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}
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