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This commit is contained in:
alexvoste
2026-05-07 02:22:25 +03:00
commit 1a9fd27a31
226 changed files with 29188 additions and 0 deletions
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kernel/include/fs/ext2.h
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#ifndef EXT2_H
#define EXT2_H
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include "../drivers/blkdev.h"
#include "vfs.h"
#define EXT2_SUPER_MAGIC 0xEF53
#define EXT2_SUPER_OFFSET 1024
#define EXT2_ROOT_INO 2
#define EXT2_GOOD_OLD_REV 0
#define EXT2_DYNAMIC_REV 1
#define EXT2_VALID_FS 1
#define EXT2_ERROR_FS 2
#define EXT2_S_IFSOCK 0xC000
#define EXT2_S_IFLNK 0xA000
#define EXT2_S_IFREG 0x8000
#define EXT2_S_IFBLK 0x6000
#define EXT2_S_IFDIR 0x4000
#define EXT2_S_IFCHR 0x2000
#define EXT2_S_IFIFO 0x1000
#define EXT2_FT_UNKNOWN 0
#define EXT2_FT_REG_FILE 1
#define EXT2_FT_DIR 2
#define EXT2_FT_CHRDEV 3
#define EXT2_FT_BLKDEV 4
#define EXT2_FT_FIFO 5
#define EXT2_FT_SOCK 6
#define EXT2_FT_SYMLINK 7
#define EXT2_NDIR_BLOCKS 12
#define EXT2_IND_BLOCK 12
#define EXT2_DIND_BLOCK 13
#define EXT2_TIND_BLOCK 14
#define EXT2_N_BLOCKS 15
#define EXT2_NAME_LEN 255
typedef struct __attribute__((packed)) {
uint32_t s_inodes_count;
uint32_t s_blocks_count;
uint32_t s_r_blocks_count;
uint32_t s_free_blocks_count;
uint32_t s_free_inodes_count;
uint32_t s_first_data_block;
uint32_t s_log_block_size;
uint32_t s_log_frag_size;
uint32_t s_blocks_per_group;
uint32_t s_frags_per_group;
uint32_t s_inodes_per_group;
uint32_t s_mtime;
uint32_t s_wtime;
uint16_t s_mnt_count;
uint16_t s_max_mnt_count;
uint16_t s_magic;
uint16_t s_state;
uint16_t s_errors;
uint16_t s_minor_rev_level;
uint32_t s_lastcheck;
uint32_t s_checkinterval;
uint32_t s_creator_os;
uint32_t s_rev_level;
uint16_t s_def_resuid;
uint16_t s_def_resgid;
uint32_t s_first_ino;
uint16_t s_inode_size;
uint16_t s_block_group_nr;
uint32_t s_feature_compat;
uint32_t s_feature_incompat;
uint32_t s_feature_ro_compat;
uint8_t s_uuid[16];
char s_volume_name[16];
char s_last_mounted[64];
uint32_t s_algo_bitmap;
uint8_t s_prealloc_blocks;
uint8_t s_prealloc_dir_blocks;
uint16_t s_padding1;
uint8_t s_journal_uuid[16];
uint32_t s_journal_inum;
uint32_t s_journal_dev;
uint32_t s_last_orphan;
uint32_t s_hash_seed[4];
uint8_t s_def_hash_version;
uint8_t s_reserved_pad[3];
uint32_t s_default_mount_options;
uint32_t s_first_meta_bg;
uint8_t s_reserved[760];
} ext2_superblock_t;
_Static_assert(sizeof(ext2_superblock_t) == 1024, "ext2 superblock size");
typedef struct __attribute__((packed)) {
uint32_t bg_block_bitmap;
uint32_t bg_inode_bitmap;
uint32_t bg_inode_table;
uint16_t bg_free_blocks_count;
uint16_t bg_free_inodes_count;
uint16_t bg_used_dirs_count;
uint16_t bg_pad;
uint8_t bg_reserved[12];
} ext2_group_desc_t;
_Static_assert(sizeof(ext2_group_desc_t) == 32, "ext2 group desc size");
typedef struct __attribute__((packed)) {
uint16_t i_mode;
uint16_t i_uid;
uint32_t i_size;
uint32_t i_atime;
uint32_t i_ctime;
uint32_t i_mtime;
uint32_t i_dtime;
uint16_t i_gid;
uint16_t i_links_count;
uint32_t i_blocks;
uint32_t i_flags;
uint32_t i_osd1;
uint32_t i_block[EXT2_N_BLOCKS];
uint32_t i_generation;
uint32_t i_file_acl;
uint32_t i_dir_acl;
uint32_t i_faddr;
uint8_t i_osd2[12];
} ext2_inode_t;
_Static_assert(sizeof(ext2_inode_t) == 128, "ext2 inode size");
typedef struct __attribute__((packed)) {
uint32_t inode;
uint16_t rec_len;
uint8_t name_len;
uint8_t file_type;
char name[EXT2_NAME_LEN];
} ext2_dir_entry_t;
typedef struct {
blkdev_t *dev;
ext2_superblock_t sb;
ext2_group_desc_t *gdt;
uint32_t block_size;
uint32_t groups_count;
uint32_t inodes_per_block;
uint32_t inode_size;
uint32_t ptrs_per_block;
bool dirty;
} ext2_t;
typedef struct {
ext2_t *fs;
uint32_t ino;
} ext2_vdata_t;
int ext2_format(blkdev_t *dev, const char *label);
vnode_t *ext2_mount(blkdev_t *dev);
void ext2_unmount(ext2_t *fs);
void ext2_sync(ext2_t *fs);
#endif