toaruos/kernel/include/ext2.h

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#ifndef EXT2_H
#define EXT2_h
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#ifdef _KERNEL_
# include <types.h>
#else
# ifdef BOOTLOADER
# include <types.h>
# else
# include <stdint.h>
# endif
#endif
#define EXT2_SUPER_MAGIC 0xEF53
struct ext2_superblock {
uint32_t inodes_count;
uint32_t blocks_count;
uint32_t r_blocks_count;
uint32_t free_blocks_count;
uint32_t free_inodes_count;
uint32_t first_data_block;
uint32_t log_block_size;
uint32_t log_frag_size;
uint32_t blocks_per_group;
uint32_t frags_per_group;
uint32_t inodes_per_group;
uint32_t mtime;
uint32_t wtime;
uint16_t mnt_count;
uint16_t max_mnt_count;
uint16_t magic;
uint16_t state;
uint16_t errors;
uint16_t minor_rev_level;
uint32_t lastcheck;
uint32_t checkinterval;
uint32_t creator_os;
uint32_t rev_level;
uint16_t def_resuid;
uint16_t def_resgid;
/* EXT2_DYNAMIC_REV */
uint32_t first_ino;
uint16_t inode_size;
uint16_t block_group_nr;
uint32_t feature_compat;
uint32_t feature_incompat;
uint32_t feature_ro_compat;
uint8_t uuid[16];
uint8_t volume_name[16];
uint8_t last_mounted[16];
uint32_t algo_bitmap;
/* Performance Hints */
uint8_t prealloc_blocks;
uint8_t prealloc_dir_blocks;
uint16_t _padding;
/* Journaling Support */
uint8_t journal_uuid[16];
uint32_t journal_inum;
uint32_t jounral_dev;
uint32_t last_orphan;
/* Directory Indexing Support */
uint32_t hash_seed[4];
uint8_t def_hash_version;
uint16_t _padding_a;
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uint8_t _padding_b;
/* Other Options */
uint32_t default_mount_options;
uint32_t first_meta_bg;
uint8_t _unused[760];
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} __attribute__ ((packed));
typedef struct ext2_superblock ext2_superblock_t;
struct ext2_bgdescriptor {
uint32_t block_bitmap;
uint32_t inode_bitmap;
uint32_t inode_table;
uint16_t free_blocks_count;
uint16_t free_inodes_count;
uint16_t used_dirs_count;
uint16_t pad;
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uint8_t reserved[12];
} __attribute__ ((packed));
typedef struct ext2_bgdescriptor ext2_bgdescriptor_t;
/* File Types */
#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
/* setuid, etc. */
#define EXT2_S_ISUID 0x0800
#define EXT2_S_ISGID 0x0400
#define EXT2_S_ISVTX 0x0200
/* rights */
#define EXT2_S_IRUSR 0x0100
#define EXT2_S_IWUSR 0x0080
#define EXT2_S_IXUSR 0x0040
#define EXT2_S_IRGRP 0x0020
#define EXT2_S_IWGRP 0x0010
#define EXT2_S_IXGRP 0x0008
#define EXT2_S_IROTH 0x0004
#define EXT2_S_IWOTH 0x0002
#define EXT2_S_IXOTH 0x0001
struct ext2_inodetable {
uint16_t mode;
uint16_t uid;
uint32_t size;
uint32_t atime;
uint32_t ctime;
uint32_t mtime;
uint32_t dtime;
uint16_t gid;
uint16_t links_count;
uint32_t blocks;
uint32_t flags;
uint32_t osd1;
uint32_t block[15];
uint32_t generation;
uint32_t file_acl;
uint32_t dir_acl;
uint32_t faddr;
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uint8_t osd2[12];
} __attribute__ ((packed));
typedef struct ext2_inodetable ext2_inodetable_t;
struct ext2_dir {
uint32_t inode;
uint16_t rec_len;
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uint8_t name_len;
uint8_t file_type;
char name; /* Actually a set of characters, at most 255 bytes */
} __attribute__ ((packed));
typedef struct ext2_dir ext2_dir_t;
void initrd_mount(uint32_t mem_head, uint32_t mem_top);
#endif