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Ext2Mgr adds + after fs name if it contains features not yet supported by the Windows driver, e.g EXT4+
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Bo Branten
235
Ext2Mgr/super.h
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235
Ext2Mgr/super.h
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#ifndef SUPER_H
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#define SUPER_H
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/* The following is a subset of ext4.h used by the application */
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typedef unsigned char __u8;
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typedef unsigned short __u16, __le16;
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typedef unsigned int __u32, __le32;
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typedef unsigned long long __u64, __le64;
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/*
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* Structure of the super block
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*/
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struct ext4_super_block {
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/*00*/ __le32 s_inodes_count; /* Inodes count */
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__le32 s_blocks_count_lo; /* Blocks count */
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__le32 s_r_blocks_count_lo; /* Reserved blocks count */
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__le32 s_free_blocks_count_lo; /* Free blocks count */
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/*10*/ __le32 s_free_inodes_count; /* Free inodes count */
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__le32 s_first_data_block; /* First Data Block */
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__le32 s_log_block_size; /* Block size */
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__le32 s_log_cluster_size; /* Allocation cluster size */
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/*20*/ __le32 s_blocks_per_group; /* # Blocks per group */
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__le32 s_clusters_per_group; /* # Clusters per group */
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__le32 s_inodes_per_group; /* # Inodes per group */
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__le32 s_mtime; /* Mount time */
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/*30*/ __le32 s_wtime; /* Write time */
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__le16 s_mnt_count; /* Mount count */
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__le16 s_max_mnt_count; /* Maximal mount count */
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__le16 s_magic; /* Magic signature */
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__le16 s_state; /* File system state */
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__le16 s_errors; /* Behaviour when detecting errors */
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__le16 s_minor_rev_level; /* minor revision level */
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/*40*/ __le32 s_lastcheck; /* time of last check */
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__le32 s_checkinterval; /* max. time between checks */
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__le32 s_creator_os; /* OS */
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__le32 s_rev_level; /* Revision level */
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/*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */
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__le16 s_def_resgid; /* Default gid for reserved blocks */
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/*
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* These fields are for EXT4_DYNAMIC_REV superblocks only.
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*
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* Note: the difference between the compatible feature set and
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* the incompatible feature set is that if there is a bit set
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* in the incompatible feature set that the kernel doesn't
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* know about, it should refuse to mount the filesystem.
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*
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* e2fsck's requirements are more strict; if it doesn't know
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* about a feature in either the compatible or incompatible
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* feature set, it must abort and not try to meddle with
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* things it doesn't understand...
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*/
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__le32 s_first_ino; /* First non-reserved inode */
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__le16 s_inode_size; /* size of inode structure */
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__le16 s_block_group_nr; /* block group # of this superblock */
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__le32 s_feature_compat; /* compatible feature set */
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/*60*/ __le32 s_feature_incompat; /* incompatible feature set */
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__le32 s_feature_ro_compat; /* readonly-compatible feature set */
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/*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */
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/*78*/ char s_volume_name[16]; /* volume name */
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/*88*/ char s_last_mounted[64]; /* directory where last mounted */
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/*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */
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/*
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* Performance hints. Directory preallocation should only
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* happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on.
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*/
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__u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
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__u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
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__le16 s_reserved_gdt_blocks; /* Per group desc for online growth */
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/*
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* Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set.
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*/
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/*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */
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/*E0*/ __le32 s_journal_inum; /* inode number of journal file */
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__le32 s_journal_dev; /* device number of journal file */
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__le32 s_last_orphan; /* start of list of inodes to delete */
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__le32 s_hash_seed[4]; /* HTREE hash seed */
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__u8 s_def_hash_version; /* Default hash version to use */
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__u8 s_jnl_backup_type;
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__le16 s_desc_size; /* size of group descriptor */
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/*100*/ __le32 s_default_mount_opts;
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__le32 s_first_meta_bg; /* First metablock block group */
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__le32 s_mkfs_time; /* When the filesystem was created */
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__le32 s_jnl_blocks[17]; /* Backup of the journal inode */
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/* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */
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/*150*/ __le32 s_blocks_count_hi; /* Blocks count */
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__le32 s_r_blocks_count_hi; /* Reserved blocks count */
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__le32 s_free_blocks_count_hi; /* Free blocks count */
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__le16 s_min_extra_isize; /* All inodes have at least # bytes */
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__le16 s_want_extra_isize; /* New inodes should reserve # bytes */
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__le32 s_flags; /* Miscellaneous flags */
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__le16 s_raid_stride; /* RAID stride */
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__le16 s_mmp_update_interval; /* # seconds to wait in MMP checking */
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__le64 s_mmp_block; /* Block for multi-mount protection */
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__le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/
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__u8 s_log_groups_per_flex; /* FLEX_BG group size */
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__u8 s_checksum_type; /* metadata checksum algorithm used */
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__u8 s_encryption_level; /* versioning level for encryption */
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__u8 s_reserved_pad; /* Padding to next 32bits */
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__le64 s_kbytes_written; /* nr of lifetime kilobytes written */
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__le32 s_snapshot_inum; /* Inode number of active snapshot */
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__le32 s_snapshot_id; /* sequential ID of active snapshot */
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__le64 s_snapshot_r_blocks_count; /* reserved blocks for active
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snapshot's future use */
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__le32 s_snapshot_list; /* inode number of the head of the
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on-disk snapshot list */
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__le32 s_error_count; /* number of fs errors */
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__le32 s_first_error_time; /* first time an error happened */
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__le32 s_first_error_ino; /* inode involved in first error */
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__le64 s_first_error_block; /* block involved of first error */
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__u8 s_first_error_func[32]; /* function where the error happened */
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__le32 s_first_error_line; /* line number where error happened */
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__le32 s_last_error_time; /* most recent time of an error */
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__le32 s_last_error_ino; /* inode involved in last error */
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__le32 s_last_error_line; /* line number where error happened */
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__le64 s_last_error_block; /* block involved of last error */
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__u8 s_last_error_func[32]; /* function where the error happened */
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__u8 s_mount_opts[64];
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__le32 s_usr_quota_inum; /* inode for tracking user quota */
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__le32 s_grp_quota_inum; /* inode for tracking group quota */
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__le32 s_overhead_clusters; /* overhead blocks/clusters in fs */
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__le32 s_backup_bgs[2]; /* groups with sparse_super2 SBs */
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__u8 s_encrypt_algos[4]; /* Encryption algorithms in use */
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__u8 s_encrypt_pw_salt[16]; /* Salt used for string2key algorithm */
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__le32 s_lpf_ino; /* Location of the lost+found inode */
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__le32 s_prj_quota_inum; /* inode for tracking project quota */
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__le32 s_checksum_seed; /* crc32c(uuid) if csum_seed set */
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__u8 s_wtime_hi;
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__u8 s_mtime_hi;
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__u8 s_mkfs_time_hi;
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__u8 s_lastcheck_hi;
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__u8 s_first_error_time_hi;
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__u8 s_last_error_time_hi;
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__u8 s_pad[2];
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__le32 s_reserved[96]; /* Padding to the end of the block */
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__le32 s_checksum; /* crc32c(superblock) */
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};
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/* s_magic */
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#define EXT4_SUPER_MAGIC 0xEF53
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/*
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* Feature set definitions in s_feature_compat,
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* s_feature_incompat and s_feature_ro_compat
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*/
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#define EXT4_HAS_COMPAT_FEATURE(sb,mask) \
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( (sb)->s_feature_compat & (mask) )
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#define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask) \
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( (sb)->s_feature_ro_compat & (mask) )
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#define EXT4_HAS_INCOMPAT_FEATURE(sb,mask) \
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( (sb)->s_feature_incompat & (mask) )
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#define EXT4_SET_COMPAT_FEATURE(sb,mask) \
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(sb)->s_feature_compat |= (mask)
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#define EXT4_SET_RO_COMPAT_FEATURE(sb,mask) \
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(sb)->s_feature_ro_compat |= (mask)
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#define EXT4_SET_INCOMPAT_FEATURE(sb,mask) \
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(sb)->s_feature_incompat |= (mask)
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#define EXT4_CLEAR_COMPAT_FEATURE(sb,mask) \
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(sb)->s_feature_compat &= ~(mask)
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#define EXT4_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
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(sb)->s_feature_ro_compat &= ~(mask)
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#define EXT4_CLEAR_INCOMPAT_FEATURE(sb,mask) \
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(sb)->s_feature_incompat &= ~(mask)
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#define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001
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#define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002
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#define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004
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#define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008
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#define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010
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#define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020
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#define EXT4_FEATURE_COMPAT_SPARSE_SUPER2 0x0200
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/*
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* The reason why "FAST_COMMIT" is a compat feature is that, FS becomes
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* incompatible only if fast commit blocks are present in the FS. Since we
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* clear the journal (and thus the fast commit blocks), we don't mark FS as
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* incompatible. We also have a JBD2 incompat feature, which gets set when
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* there are fast commit blocks present in the journal.
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*/
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#define EXT4_FEATURE_COMPAT_FAST_COMMIT 0x0400
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#define EXT4_FEATURE_COMPAT_STABLE_INODES 0x0800
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#define EXT4_FEATURE_COMPAT_ORPHAN_FILE 0x1000 /* Orphan file exists */
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#define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
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#define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
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#define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
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#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008
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#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
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#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
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#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
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#define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100
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#define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200
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/*
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* METADATA_CSUM also enables group descriptor checksums (GDT_CSUM). When
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* METADATA_CSUM is set, group descriptor checksums use the same algorithm as
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* all other data structures' checksums. However, the METADATA_CSUM and
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* GDT_CSUM bits are mutually exclusive.
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*/
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#define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400
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#define EXT4_FEATURE_RO_COMPAT_READONLY 0x1000
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#define EXT4_FEATURE_RO_COMPAT_PROJECT 0x2000
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#define EXT4_FEATURE_RO_COMPAT_VERITY 0x8000
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#define EXT4_FEATURE_RO_COMPAT_ORPHAN_PRESENT 0x10000 /* Orphan file may be
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non-empty */
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#define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001
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#define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002
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#define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
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#define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
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#define EXT4_FEATURE_INCOMPAT_META_BG 0x0010
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#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */
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#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
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#define EXT4_FEATURE_INCOMPAT_MMP 0x0100
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#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
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#define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400 /* EA in inode */
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#define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 /* data in dirent */
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#define EXT4_FEATURE_INCOMPAT_CSUM_SEED 0x2000
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#define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */
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#define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */
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#define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000
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#define EXT4_FEATURE_INCOMPAT_CASEFOLD 0x20000
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/* This declaration tells the application witch ext4 features the driver supports
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so it must be kept in sync with ..\Ext4Fsd\include\linux\ext4.h */
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#define EXT4_FEATURE_INCOMPAT_SUPP ( \
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EXT4_FEATURE_INCOMPAT_FILETYPE| \
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EXT4_FEATURE_INCOMPAT_RECOVER| \
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EXT4_FEATURE_INCOMPAT_META_BG| \
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EXT4_FEATURE_INCOMPAT_EXTENTS| \
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EXT4_FEATURE_INCOMPAT_64BIT| \
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EXT4_FEATURE_INCOMPAT_FLEX_BG| \
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EXT4_FEATURE_INCOMPAT_CSUM_SEED)
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#endif /* SUPER_H */
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