DcraftBg
647d6a273d
- Removed virtual functions for all of the stat stuff. This did however introduce some issues, mainly with /proc becoming out of sync if you changed your ID. I propose we do the linux thing and just have a stat update function which is optional, but allows dynamic updates of stat fields for cases such as those in uid/gid in /proc. - Simplified the API, although still kind of annoying it is a bit simpler. - Moved some of the FS structure from having the FS inode inside the in memory inode to a Serialise <-> Deserialise model where Inodes are deserialised from disk into in memory ones and then back into on disk ones when it comes time for syncing. This makes it semantically better in my opinion, as it explicitly separates disk and non-disk functionality.
269 lines
4.8 KiB
C++
269 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 InodeBlocks {
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uint32_t block[15];
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};
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struct Osd2 {
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uint32_t osd2[3];
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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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InodeBlocks block;
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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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Osd2 osd2;
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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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