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Diffstat (limited to 'libparted/fs/ext2/ext2_fs.h')
| -rw-r--r-- | libparted/fs/ext2/ext2_fs.h | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/libparted/fs/ext2/ext2_fs.h b/libparted/fs/ext2/ext2_fs.h new file mode 100644 index 0000000..1eca7ab --- /dev/null +++ b/libparted/fs/ext2/ext2_fs.h @@ -0,0 +1,329 @@ +/* + * linux/include/linux/ext2_fs.h + * + * Copyright (C) 1992, 1993, 1994, 1995 + * Remy Card (card@masi.ibp.fr) + * Laboratoire MASI - Institut Blaise Pascal + * Universite Pierre et Marie Curie (Paris VI) + * + * from + * + * linux/include/linux/minix_fs.h + * + * Copyright (C) 1991, 1992 Linus Torvalds + */ + +/* + * EXT2_*_*() convienience macros added by Andrew Clausen <clausen@gnu.org> + * Copyright (C) 2000, 2009-2014, 2019-2023 Free Software Foundation, Inc. + */ + +#ifndef _EXT2_FS_H +#define _EXT2_FS_H + +#include <parted/endian.h> +#include <stdint.h> + +/* + * The second extended file system constants/structures + */ + +#define EXT2_SUPER_MAGIC_CONST 0xEF53 +#define EXT2_MIN_BLOCK_SIZE 1024 +#define EXT2_NDIR_BLOCKS 12 +#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS +#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1) +#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1) +#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1) +#define EXT2_VALID_FS 0x0001 +#define EXT2_ERROR_FS 0x0002 +#define EXT2_RESERVED_INODE_COUNT 11 + +/* + * Codes for operating systems + */ +#define EXT2_OS_LINUX 0 +#define EXT2_OS_HURD 1 +#define EXT2_OS_MASIX 2 +#define EXT2_OS_FREEBSD 3 +#define EXT2_OS_LITES 4 + +/* + * Feature set definitions + */ +#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004 +#define EXT2_FEATURE_COMPAT_HAS_DIR_INDEX 0x0020 + +#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 +#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 +#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 +#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 +#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 + +#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002 +#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 +#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 +#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 +#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 + +/* + * Special inodes numbers + */ +#define EXT2_BAD_INO 1 /* Bad blocks inode */ +#define EXT2_ROOT_INO 2 /* Root inode */ +#define EXT2_ACL_IDX_INO 3 /* ACL inode */ +#define EXT2_ACL_DATA_INO 4 /* ACL inode */ +#define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */ +#define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */ + +/* + * Ext2 directory file types. Only the low 3 bits are used. The + * other bits are reserved for now. + */ +#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 + +/* + * Behaviour when detecting errors + */ +#define EXT2_ERRORS_CONTINUE 1 /* Continue execution */ +#define EXT2_ERRORS_RO 2 /* Remount fs read-only */ +#define EXT2_ERRORS_PANIC 3 /* Panic */ +#define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE + +struct ext2_dir_entry_2 +{ + uint32_t inode; + uint16_t rec_len; + uint8_t name_len; + uint8_t file_type; + char name[255]; +}; + +struct ext2_group_desc +{ + 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; + uint32_t bg_reserved[3]; +}; + +struct ext2_inode +{ + uint16_t i_mode; /* File mode */ + uint16_t i_uid; /* Owner Uid */ + uint32_t i_size; /* Size in bytes */ + uint32_t i_atime; /* Access time */ + uint32_t i_ctime; /* Creation time */ + uint32_t i_mtime; /* Modification time */ + uint32_t i_dtime; /* Deletion Time */ + uint16_t i_gid; /* Group Id */ + uint16_t i_links_count; /* Links count */ + uint32_t i_blocks; /* Blocks count */ + uint32_t i_flags; /* File flags */ + union { + struct { + uint32_t l_i_reserved1; + } linux1; + struct { + uint32_t h_i_translator; + } hurd1; + struct { + uint32_t m_i_reserved1; + } masix1; + } osd1; /* OS dependent 1 */ + uint32_t i_block[EXT2_N_BLOCKS];/* Pointers to blocks */ + uint32_t i_generation; /* File version (for NFS) */ + uint32_t i_file_acl; /* File ACL */ + uint32_t i_dir_acl; /* Directory ACL */ + uint32_t i_faddr; /* Fragment address */ + union { + struct { + uint8_t l_i_frag; /* Fragment number */ + uint8_t l_i_fsize; /* Fragment size */ + uint16_t i_pad1; + uint32_t l_i_reserved2[2]; + } linux2; + struct { + uint8_t h_i_frag; /* Fragment number */ + uint8_t h_i_fsize; /* Fragment size */ + uint16_t h_i_mode_high; + uint16_t h_i_uid_high; + uint16_t h_i_gid_high; + uint32_t h_i_author; + } hurd2; + struct { + uint8_t m_i_frag; /* Fragment number */ + uint8_t m_i_fsize; /* Fragment size */ + uint16_t m_pad1; + uint32_t m_i_reserved2[2]; + } masix2; + } osd2; /* OS dependent 2 */ +}; + +#define i_size_high i_dir_acl + +struct __attribute__ ((packed)) ext2_super_block +{ + uint32_t s_inodes_count; /* Inodes count */ + uint32_t s_blocks_count; /* Blocks count */ + uint32_t s_r_blocks_count; /* Reserved blocks count */ + uint32_t s_free_blocks_count; /* Free blocks count */ + uint32_t s_free_inodes_count; /* Free inodes count */ + uint32_t s_first_data_block; /* First Data Block */ + uint32_t s_log_block_size; /* Block size */ + int32_t s_log_frag_size; /* Fragment size */ + uint32_t s_blocks_per_group; /* # Blocks per group */ + uint32_t s_frags_per_group; /* # Fragments per group */ + uint32_t s_inodes_per_group; /* # Inodes per group */ + uint32_t s_mtime; /* Mount time */ + uint32_t s_wtime; /* Write time */ + uint16_t s_mnt_count; /* Mount count */ + int16_t s_max_mnt_count; /* Maximal mount count */ + uint16_t s_magic; /* Magic signature */ + uint16_t s_state; /* File system state */ + uint16_t s_errors; /* Behaviour when detecting errors */ + uint16_t s_minor_rev_level; /* minor revision level */ + uint32_t s_lastcheck; /* time of last check */ + uint32_t s_checkinterval; /* max. time between checks */ + uint32_t s_creator_os; /* OS */ + uint32_t s_rev_level; /* Revision level */ + uint16_t s_def_resuid; /* Default uid for reserved blocks */ + uint16_t s_def_resgid; /* Default gid for reserved blocks */ + /* + * These fields are for EXT2_DYNAMIC_REV superblocks only. + * + * Note: the difference between the compatible feature set and + * the incompatible feature set is that if there is a bit set + * in the incompatible feature set that the kernel doesn't + * know about, it should refuse to mount the file system. + * + * e2fsck's requirements are more strict; if it doesn't know + * about a feature in either the compatible or incompatible + * feature set, it must abort and not try to meddle with + * things it doesn't understand... + */ + uint32_t s_first_ino; /* First non-reserved inode */ + uint16_t s_inode_size; /* size of inode structure */ + uint16_t s_block_group_nr; /* block group # of this superblock */ + uint32_t s_feature_compat; /* compatible feature set */ + uint32_t s_feature_incompat; /* incompatible feature set */ + uint32_t s_feature_ro_compat; /* readonly-compatible feature set */ + uint8_t s_uuid[16]; /* 128-bit uuid for volume */ + char s_volume_name[16]; /* volume name */ + char s_last_mounted[64]; /* directory where last mounted */ + uint32_t s_algorithm_usage_bitmap; /* For compression */ + /* + * Performance hints. Directory preallocation should only + * happen if the EXT2_COMPAT_PREALLOC flag is on. + */ + uint8_t s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ + uint8_t s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ + uint16_t s_padding1; + /* + * Journaling support valid if EXT2_FEATURE_COMPAT_HAS_JOURNAL set. + */ + uint8_t s_journal_uuid[16]; /* uuid of journal superblock */ + uint32_t s_journal_inum; /* inode number of journal file */ + uint32_t s_journal_dev; /* device number of journal file */ + uint32_t s_last_orphan; /* start of list of inodes to delete */ + + uint32_t s_reserved[197]; /* Padding to the end of the block */ +}; + +#define EXT2_DIRENT_INODE(dir_ent) (PED_LE32_TO_CPU((dir_ent).inode)) +#define EXT2_DIRENT_REC_LEN(dir_ent) (PED_LE16_TO_CPU((dir_ent).rec_len)) +#define EXT2_DIRENT_NAME_LEN(dir_ent) ((dir_ent).name_len) +#define EXT2_DIRENT_FILE_TYPE(dir_ent) ((dir_ent).file_type) + +#define EXT2_GROUP_BLOCK_BITMAP(gd) (PED_LE32_TO_CPU((gd).bg_block_bitmap)) +#define EXT2_GROUP_INODE_BITMAP(gd) (PED_LE32_TO_CPU((gd).bg_inode_bitmap)) +#define EXT2_GROUP_INODE_TABLE(gd) (PED_LE32_TO_CPU((gd).bg_inode_table)) +#define EXT2_GROUP_FREE_BLOCKS_COUNT(gd) \ + (PED_LE16_TO_CPU((gd).bg_free_blocks_count)) +#define EXT2_GROUP_FREE_INODES_COUNT(gd) \ + (PED_LE16_TO_CPU((gd).bg_free_inodes_count)) +#define EXT2_GROUP_USED_DIRS_COUNT(gd) \ + (PED_LE16_TO_CPU((gd).bg_used_dirs_count)) + +#define EXT2_INODE_MODE(inode) (PED_LE16_TO_CPU((inode).i_mode)) +#define EXT2_INODE_UID(inode) (PED_LE16_TO_CPU((inode).i_uid)) +#define EXT2_INODE_SIZE(inode) \ + ((uint64_t) PED_LE32_TO_CPU((inode).i_size) \ + + ((uint64_t) PED_LE32_TO_CPU((inode).i_size_high) << 32)) +#define EXT2_INODE_ATIME(inode) (PED_LE32_TO_CPU((inode).i_atime)) +#define EXT2_INODE_CTIME(inode) (PED_LE32_TO_CPU((inode).i_ctime)) +#define EXT2_INODE_MTIME(inode) (PED_LE32_TO_CPU((inode).i_mtime)) +#define EXT2_INODE_DTIME(inode) (PED_LE32_TO_CPU((inode).i_dtime)) +#define EXT2_INODE_GID(inode) (PED_LE16_TO_CPU((inode).i_gid)) +#define EXT2_INODE_LINKS_COUNT(inode) (PED_LE16_TO_CPU((inode).i_links_count)) +#define EXT2_INODE_BLOCKS(inode) (PED_LE32_TO_CPU((inode).i_blocks)) +#define EXT2_INODE_FLAGS(inode) (PED_LE32_TO_CPU((inode).i_flags)) +#define EXT2_INODE_TRANSLATOR(inode) (PED_LE32_TO_CPU((inode).osd1.hurd1.h_i_translator)) +#define EXT2_INODE_BLOCK(inode, blk) (PED_LE32_TO_CPU((inode).i_block[blk])) + +#define EXT2_SUPER_INODES_COUNT(sb) (PED_LE32_TO_CPU((sb).s_inodes_count)) +#define EXT2_SUPER_BLOCKS_COUNT(sb) (PED_LE32_TO_CPU((sb).s_blocks_count)) +#define EXT2_SUPER_R_BLOCKS_COUNT(sb) (PED_LE32_TO_CPU((sb).s_r_blocks_count)) +#define EXT2_SUPER_FREE_BLOCKS_COUNT(sb) \ + (PED_LE32_TO_CPU((sb).s_free_blocks_count)) +#define EXT2_SUPER_FREE_INODES_COUNT(sb) \ + (PED_LE32_TO_CPU((sb).s_free_inodes_count)) +#define EXT2_SUPER_FIRST_DATA_BLOCK(sb) \ + (PED_LE32_TO_CPU((sb).s_first_data_block)) +#define EXT2_SUPER_LOG_BLOCK_SIZE(sb) (PED_LE32_TO_CPU((sb).s_log_block_size)) +#define EXT2_SUPER_LOG_FRAG_SIZE(sb) \ + ((int32_t) PED_LE32_TO_CPU((sb).s_log_frag_size)) +#define EXT2_SUPER_BLOCKS_PER_GROUP(sb) \ + (PED_LE32_TO_CPU((sb).s_blocks_per_group)) +#define EXT2_SUPER_FRAGS_PER_GROUP(sb) \ + (PED_LE32_TO_CPU((sb).s_frags_per_group)) +#define EXT2_SUPER_INODES_PER_GROUP(sb) \ + (PED_LE32_TO_CPU((sb).s_inodes_per_group)) +#define EXT2_SUPER_MTIME(sb) (PED_LE32_TO_CPU((sb).s_mtime)) +#define EXT2_SUPER_WTIME(sb) (PED_LE32_TO_CPU((sb).s_wtime)) +#define EXT2_SUPER_MNT_COUNT(sb) (PED_LE16_TO_CPU((sb).s_mnt_count)) +#define EXT2_SUPER_MAX_MNT_COUNT(sb) \ + ((int16_t) PED_LE16_TO_CPU((sb).s_max_mnt_count)) +#define EXT2_SUPER_MAGIC(sb) (PED_LE16_TO_CPU((sb).s_magic)) +#define EXT2_SUPER_STATE(sb) (PED_LE16_TO_CPU((sb).s_state)) +#define EXT2_SUPER_ERRORS(sb) (PED_LE16_TO_CPU((sb).s_errors)) +#define EXT2_SUPER_MINOR_REV_LEVEL(sb) \ + (PED_LE16_TO_CPU((sb).s_minor_rev_level)) +#define EXT2_SUPER_LASTCHECK(sb) (PED_LE32_TO_CPU((sb).s_lastcheck)) +#define EXT2_SUPER_CHECKINTERVAL(sb) (PED_LE32_TO_CPU((sb).s_checkinterval)) +#define EXT2_SUPER_CREATOR_OS(sb) (PED_LE32_TO_CPU((sb).s_creator_os)) +#define EXT2_SUPER_REV_LEVEL(sb) (PED_LE32_TO_CPU((sb).s_rev_level)) +#define EXT2_SUPER_DEF_RESUID(sb) (PED_LE16_TO_CPU((sb).s_def_resuid)) +#define EXT2_SUPER_DEF_RESGID(sb) (PED_LE16_TO_CPU((sb).s_def_resgid)) + +#define EXT2_SUPER_FIRST_INO(sb) (PED_LE32_TO_CPU((sb).s_first_ino)) +#define EXT2_SUPER_INODE_SIZE(sb) (PED_LE16_TO_CPU((sb).s_inode_size)) +#define EXT2_SUPER_BLOCK_GROUP_NR(sb) (PED_LE16_TO_CPU((sb).s_block_group_nr)) +#define EXT2_SUPER_FEATURE_COMPAT(sb) (PED_LE32_TO_CPU((sb).s_feature_compat)) +#define EXT2_SUPER_FEATURE_INCOMPAT(sb) \ + (PED_LE32_TO_CPU((sb).s_feature_incompat)) +#define EXT2_SUPER_FEATURE_RO_COMPAT(sb) \ + (PED_LE32_TO_CPU((sb).s_feature_ro_compat)) +#define EXT2_SUPER_UUID(sb) ((sb).s_uuid) +#define EXT2_SUPER_VOLUME_NAME(sb) ((sb).s_volume_name) +#define EXT2_SUPER_LAST_MOUNTED(sb) ((sb).s_last_mounted) +#define EXT2_SUPER_ALGORITHM_USAGE_BITMAP(sb) \ + (PED_LE32_TO_CPU((sb).s_algorithm_usage_bitmap)) + +#define EXT2_SUPER_JOURNAL_UUID(sb) ((sb).s_journal_uuid) +#define EXT2_SUPER_JOURNAL_INUM(sb) (PED_LE32_TO_CPU((sb).s_journal_inum)) +#define EXT2_SUPER_JOURNAL_DEV(sb) (PED_LE32_TO_CPU((sb).s_journal_dev)) +#define EXT2_SUPER_LAST_ORPHAN(sb) (PED_LE32_TO_CPU((sb).s_last_orphan)) + +#endif |