VirtualBox

Changeset 76256 in vbox for trunk


Ignore:
Timestamp:
Dec 16, 2018 8:36:28 PM (6 years ago)
Author:
vboxsync
Message:

Runtime/formats/ext: Add more structures

Location:
trunk
Files:
3 edited

Legend:

Unmodified
Added
Removed

  • trunk/include/iprt/formats/ext.h

    r76216 r76256  
    3232
    3333
     34/** @defgroup grp_rt_formats_ext    Extended Filesystem (EXT2/3/4) structures and definitions
     35 * @ingroup grp_rt_formats
     36 * @{
     37 */
     38
    3439/*
    3540 * The filesystem structures were retrieved from:
    3641 * https://www.kernel.org/doc/html/latest/filesystems/ext4/index.html
    3742 */
     43
     44/** @name EXT_INODE_NR_XXX - Special inode numbers.
     45 * @{ */
     46#define EXT_INODE_NR_DEF_BLOCKS     1   /**< List of defective blocks. */
     47#define EXT_INODE_NR_ROOT_DIR       2   /**< Root directory. */
     48#define EXT_INODE_NR_USER_QUOTA     3   /**< User quota. */
     49#define EXT_INODE_NR_GROUP_QUOTA    4   /**< Group quota. */
     50#define EXT_INODE_NR_BOOT_LOADER    5   /**< Boot loader. */
     51#define EXT_INODE_NR_UNDEL_DIR      6   /**< Undelete directory. */
     52#define EXT_INODE_NR_RESV_GRP_DESC  7   /**< Reserved group descriptors inode. */
     53#define EXT_INODE_NR_JOURNAL        8   /**< Journal. */
     54#define EXT_INODE_NR_EXCLUDE        9   /**< Exclude inode. */
     55#define EXT_INODE_NR_REPLICA       10   /**< Replica inode. */
     56/** @} */
    3857
    3958/**
    … …  
    4463typedef struct EXTSUPERBLOCK
    4564{
    46     /** Total number of inodes in the filesystem. */
     65    /** 0x00: Total number of inodes in the filesystem. */
    4766    uint32_t    cInodesTotal;
    48     /** Total number of blocks in the filesystem. */
    49     uint32_t    cBlocksTotal;
    50     /** Number of blocks reserved for the super user. */
    51     uint32_t    cBlocksRsvdForSuperUser;
    52     /** Total number of unallocated blocks. */
    53     uint32_t    cBlocksUnallocated;
    54     /** Total number of unallocated inodes. */
    55     uint32_t    cInodesUnallocated;
    56     /** Block number of block containing the superblock. */
     67    /** 0x04: Total number of blocks in the filesystem (low 32bits). */
     68    uint32_t    cBlocksTotalLow;
     69    /** 0x08: Number of blocks reserved for the super user (low 32bits). */
     70    uint32_t    cBlocksRsvdForSuperUserLow;
     71    /** 0x0c: Total number of free blocks (low 32bits). */
     72    uint32_t    cBlocksFreeLow;
     73    /** 0x10: Total number of free inodes. */
     74    uint32_t    cInodesFree;
     75    /** 0x14: First data block. */
    5776    uint32_t    iBlockOfSuperblock;
    58     /** Number of bits to shift 1024 to the left to get the block size */
    59     uint32_t    cBitsShiftLeftBlockSize;
    60     /** Number of bits to shift 1024 to the left to get the fragment size */
    61     uint32_t    cBitsShiftLeftFragmentSize;
    62     /** Number of blocks in each block group. */
     77    /** 0x18: Block size (calculated as 2^(10 + cBitsShiftLeftBlockSize)). */
     78    uint32_t    cLogBlockSize;
     79    /** 0x1c: Cluster size (calculated as 2^cLogClusterSize). */
     80    uint32_t    cLogClusterSize;
     81    /** 0x20: Number of blocks in each block group. */
    6382    uint32_t    cBlocksPerGroup;
    64     /** Number of fragments in each block group. */
    65     uint32_t    cFragmentsPerBlockGroup;
    66     /** Number of inodes in each block group. */
     83    /** 0x24: Number of clusters in each block group. */
     84    uint32_t    cClustersPerBlockGroup;
     85    /** 0x28: Number of inodes for each block group. */
    6786    uint32_t    cInodesPerBlockGroup;
    68     /** Last mount time. */
     87    /** 0x2c: Last mount time in seconds since epoch. */
    6988    uint32_t    u32LastMountTime;
    70     /** Last written time. */
     89    /** 0x30: Last written time in seconds since epoch. */
    7190    uint32_t    u32LastWrittenTime;
    72     /** Number of times the volume was mounted since the last check. */
     91    /** 0x34: Number of times the volume was mounted since the last check. */
    7392    uint16_t    cMountsSinceLastCheck;
    74     /** Number of mounts allowed before a consistency check. */
     93    /** 0x36: Number of mounts allowed before a consistency check. */
    7594    uint16_t    cMaxMountsUntilCheck;
    76     /** Signature to identify a ext2 volume (EXT2_SIGNATURE). */
     95    /** 0x38: Signature to identify a ext2 volume (EXT_SIGNATURE). */
    7796    uint16_t    u16Signature;
    78     /** State of the filesystem (clean/errors) */
     97    /** 0x3a: State of the filesystem (EXT_SB_STATE_XXX) */
    7998    uint16_t    u16FilesystemState;
    80     /** What to do on an error. */
     99    /** 0x3c: What to do on an error. */
    81100    uint16_t    u16ActionOnError;
    82     /** Minor version field. */
    83     uint16_t    u16VersionMinor;
    84     /** Time of last check. */
     101    /** 0x3e: Minor revision level. */
     102    uint16_t    u16RevLvlMinor;
     103    /** 0x40: Time of last check in seconds since epoch. */
    85104    uint32_t    u32LastCheckTime;
    86     /** Interval between consistency checks. */
     105    /** 0x44: Interval between consistency checks in seconds. */
    87106    uint32_t    u32CheckInterval;
    88     /** Operating system ID of the filesystem creator. */
     107    /** 0x48: Operating system ID of the filesystem creator (EXT_SB_OS_ID_CREATOR_XXX). */
    89108    uint32_t    u32OsIdCreator;
    90     /** Major version field. */
    91     uint32_t    u32VersionMajor;
    92     /** User ID that is allowed to use reserved blocks. */
     109    /** 0x4c: Revision level (EXT_SB_REV_XXX). */
     110    uint32_t    u32RevLvl;
     111    /** 0x50: User ID that is allowed to use reserved blocks. */
    93112    uint16_t    u16UidReservedBlocks;
    94     /** Group ID that is allowed to use reserved blocks. */
     113    /** 0x52: Group ID that is allowed to use reserved blocks. */
    95114    uint16_t    u16GidReservedBlocks;
    96     /** Reserved fields. */
    97     uint8_t     abReserved[940];
     115    /** 0x54: First non reserved inode number. */
     116    uint32_t    iFirstInodeNonRsvd;
     117    /** 0x58: Size of the inode structure in bytes. */
     118    uint16_t    cbInode;
     119    /** 0x5a: Block group number of this super block. */
     120    uint16_t    iBlkGrpSb;
     121    /** 0x5c: Compatible feature set flags (EXT_SB_FEAT_COMPAT_XXX). */
     122    uint32_t    fFeaturesCompat;
     123    /** 0x60: Incompatible feature set (EXT_SB_FEAT_INCOMPAT_XXX). */
     124    uint32_t    fFeaturesIncompat;
     125    /** 0x64: Readonly-compatible feature set (EXT_SB_FEAT_COMPAT_RO_XXX). */
     126    uint32_t    fFeaturesCompatRo;
     127    /** 0x68: 128bit UUID for the volume. */
     128    uint8_t     au8Uuid[16];
     129    /** 0x78: Volume name. */
     130    char        achVolumeName[16];
     131    /** 0x88: Directory were the filesystem was mounted last. */
     132    char        achLastMounted[64];
     133    /** 0xc8: Bitmap usage algorithm (used for compression). */
     134    uint32_t    u32AlgoUsageBitmap;
     135    /** 0xcc: Number of blocks to try to preallocate for files(?). */
     136    uint8_t     cBlocksPrealloc;
     137    /** 0xcd: Number of blocks to try to preallocate for directories. */
     138    uint8_t     cBlocksPreallocDirextory;
     139    /** 0xce: Number of reserved group descriptor entries for future filesystem expansion. */
     140    uint16_t    cGdtEntriesRsvd;
     141    /** 0xd0: 128bit UUID for the journal superblock. */
     142    uint8_t     au8JournalUuid[16];
     143    /** 0xe0: Inode number of the journal file. */
     144    uint32_t    iJournalInode;
     145    /** 0xe4: Device number of journal file (if the appropriate feature flag is set). */
     146    uint32_t    u32JournalDev;
     147    /** 0xe8: Start of list of orpaned inodes to delete. */
     148    uint32_t    u32LastOrphan;
     149    /** 0xec: HTREE hash seed. */
     150    uint32_t    au32HashSeedHtree[4];
     151    /** 0xfc: Default hash algorithm to use for hashes (EXT_SB_HASH_VERSION_DEF_XXX). */
     152    uint8_t     u8HashVersionDef;
     153    /** 0xfd: Journal backup type. */
     154    uint8_t     u8JnlBackupType;
     155    /** 0xfe: Group descriptor size in bytes. */
     156    uint16_t    cbGroupDesc;
     157    /** 0x100: Default mount options (EXT_SB_MNT_OPTS_DEF_XXX). */
     158    uint32_t    fMntOptsDef;
     159    /** 0x104: First metablock block group (if feature is enabled). */
     160    uint32_t    iFirstMetaBg;
     161    /** 0x108: Filesystem creation time in seconds since epoch. */
     162    uint32_t    u32TimeFsCreation;
     163    /** 0x10c: Backup copy of journals inodes block array for the first elements. */
     164    uint32_t    au32JnlBlocks[17];
     165    /** 0x150: Total number of blocks in the filesystem (high 32bits). */
     166    uint32_t    cBlocksTotalHigh;
     167    /** 0x154: Number of blocks reserved for the super user (high 32bits). */
     168    uint32_t    cBlocksRsvdForSuperUserHigh;
     169    /** 0x158: Total number of free blocks (high 32bits). */
     170    uint32_t    cBlocksFreeHigh;
     171    /** 0x15c: All inodes have at least this number of bytes. */
     172    uint16_t    cbInodesExtraMin;
     173    /** 0x15e: New inodes should reserve this number of bytes. */
     174    uint16_t    cbNewInodesRsv;
     175    /** 0x160: Miscellaneous flags (EXT_SB_F_XXX). */
     176    uint32_t    fFlags;
     177    /** 0x164: RAID stride, number of logical blocks read from or written to the disk
     178     * before moving to the next disk. */
     179    uint16_t    cRaidStride;
     180    /** 0x166: Number of seconds between multi-mount prevention checking. */
     181    uint16_t    cSecMmpInterval;
     182    /** 0x168: Block number for the multi-mount protection data. */
     183    uint64_t    iMmpBlock;
     184    /** 0x170: Raid stride width. */
     185    uint32_t    cRaidStrideWidth;
     186    /** 0x174: Size of a flexible block group (calculated as 2^cLogGroupsPerFlex). */
     187    uint8_t     cLogGroupsPerFlex;
     188    /** 0x175: Metadata checksum algorithm type, only 1 is valid (for CRC32c). */
     189    uint8_t     u8ChksumType;
     190    /** 0x176: Padding. */
     191    uint16_t    u16Padding;
     192    /** 0x178: Number of KiB written to the filesystem so far. */
     193    uint64_t    cKbWritten;
     194    /** 0x180: Inode number of active snapshot. */
     195    uint32_t    iSnapshotInode;
     196    /** 0x184: Sequential ID of active snapshot. */
     197    uint32_t    iSnapshotId;
     198    /** 0x188: Number of blocks reserved for activ snapshot's future use. */
     199    uint64_t    cSnapshotRsvdBlocks;
     200    /** 0x190: Inode number of the head of the on-disk snapshot list. */
     201    uint32_t    iSnapshotListInode;
     202    /** 0x194: Number of errors seen so far. */
     203    uint32_t    cErrorsSeen;
     204    /** 0x198: First time an error happened in seconds since epoch. */
     205    uint32_t    u32TimeFirstError;
     206    /** 0x19c: Inode involved in the first error. */
     207    uint32_t    iInodeFirstError;
     208    /** 0x1a0: Number of block involved of first error. */
     209    uint64_t    iBlkFirstError;
     210    /** 0x1a8: Name of the function where the first error happened. */
     211    char        achFuncFirstError[32];
     212    /** 0x1c8: Line number where the error happened. */
     213    uint32_t    iLineFirstError;
     214    /** 0x1cc: Time of the most receent error in seconds since epoch. */
     215    uint32_t    u32TimeLastError;
     216    /** 0x1d0: Inode involved in the most recent error. */
     217    uint32_t    iInodeLastError;
     218    /** 0x1d4: Line number where the most recent error happened. */
     219    uint32_t    iLineLastError;
     220    /** 0x1d8: Number of block involved of most recent error. */
     221    uint64_t    iBlkLastError;
     222    /** 0x1e0: Name of the function where the most recent error happened. */
     223    char        achFuncLastError[32];
     224    /** 0x200: ASCIIz string of mount options. */
     225    char        aszMntOpts[64];
     226    /** 0x240: Inode number of user quota file. */
     227    uint32_t    iInodeUsrQuota;
     228    /** 0x244: Inode number of group quota file. */
     229    uint32_t    iInodeGrpQuota;
     230    /** 0x248: Overhead blocks/clusters in filesystem. */
     231    uint32_t    cOverheadBlocks;
     232    /** 0x24c: Block groups containing superblock backups. */
     233    uint32_t    aiBlkGrpSbBackups[2];
     234    /** 0x254: Encryption algorithms in use (EXT_SB_ENCRYPT_ALGO_XXX). */
     235    uint8_t     au8EncryptAlgo[4];
     236    /** 0x258: Salt for the string2key algorithm for encryption. */
     237    uint8_t     abEncryptPwSalt[16];
     238    /** 0x268: Inode number of lost+found. */
     239    uint32_t    iInodeLostFound;
     240    /** 0x26c: Inode that tracks project quotas. */
     241    uint32_t    iInodeProjQuota;
     242    /** 0x270: Checksum seed used for the metadata checksum calculations.
     243     * Should be crc32c(~0, au8Uuid). */
     244    uint32_t    u32ChksumSeed;
     245    /** 0x274: Upper 8bits of the u32LastWrittenTime field. */
     246    uint8_t     u32LastWrittenTimeHigh8Bits;
     247    /** 0x275: Upper 8bits of the u32LastMountTime field. */
     248    uint8_t     u32LastMountTimeHigh8Bits;
     249    /** 0x276: Upper 8bits of the u32TimeFsCreation field. */
     250    uint8_t     u32TimeFsCreationHigh8Bits;
     251    /** 0x277: Upper 8bits of the u32LastCheckTime field. */
     252    uint8_t     u32LastCheckTimeHigh8Bits;
     253    /** 0x278: Upper 8bits of the u32TimeFirstError field. */
     254    uint8_t     u32TimeFirstErrorHigh8Bits;
     255    /** 0x279: Upper 8bits of the u32TimeLastError field. */
     256    uint8_t     u32TimeLastErrorHigh8Bits;
     257    /** 0x27a: Zero padding. */
     258    uint8_t     au8Padding[2];
     259    /** 0x27c: Padding to the end of the block. */
     260    uint32_t    au32Rsvd[96];
     261    /** 0x3fc: Superblock checksum. */
     262    uint32_t    u32Chksum;
    98263} EXTSUPERBLOCK;
     264AssertCompileMemberOffset(EXTSUPERBLOCK, u16UidReservedBlocks, 0x50);
     265AssertCompileMemberOffset(EXTSUPERBLOCK, u32AlgoUsageBitmap, 0xc8);
     266AssertCompileMemberOffset(EXTSUPERBLOCK, iJournalInode, 0xe0);
     267AssertCompileMemberOffset(EXTSUPERBLOCK, u8HashVersionDef, 0xfc);
     268AssertCompileMemberOffset(EXTSUPERBLOCK, fMntOptsDef, 0x100);
     269AssertCompileMemberOffset(EXTSUPERBLOCK, iBlkLastError, 0x1d8);
     270AssertCompileMemberOffset(EXTSUPERBLOCK, iInodeLostFound, 0x268);
    99271AssertCompileSize(EXTSUPERBLOCK, 1024);
    100272/** Pointer to an ext super block. */
    … …  
    104276
    105277/** Ext signature. */
    106 #define EXT_SIGNATURE      UINT16_C(0xef53)
     278#define EXT_SB_SIGNATURE                      UINT16_C(0xef53)
     279
     280/** @name EXT_SB_STATE_XXX - Filesystem state
     281 * @{ */
    107282/** Clean filesystem state. */
    108 #define EXT_STATE_CLEAN    UINT16_C(0x0001)
     283#define EXT_SB_STATE_CLEAN                    UINT16_C(0x0001)
    109284/** Error filesystem state. */
    110 #define EXT_STATE_ERRORS   UINT16_C(0x0002)
     285#define EXT_SB_STATE_ERRORS                   UINT16_C(0x0002)
     286/** Orphans being recovered state. */
     287#define EXT_SB_STATE_ORPHANS_RECOVERING       UINT16_C(0x0004)
     288/** @} */
     289
     290/** @name EXT_SB_OS_ID_CREATOR_XXX - Filesystem creator
     291 * @{ */
     292/** Linux. */
     293#define EXT_SB_OS_ID_CREATOR_LINUX            0
     294/** Hurd. */
     295#define EXT_SB_OS_ID_CREATOR_HURD             1
     296/** Masix. */
     297#define EXT_SB_OS_ID_CREATOR_MASIX            2
     298/** FreeBSD. */
     299#define EXT_SB_OS_ID_CREATOR_FREEBSD          3
     300/** Lites. */
     301#define EXT_SB_OS_ID_CREATOR_LITES            4
     302/** @} */
     303
     304/** @name EXT_SB_REV_XXX - Superblock revision
     305 * @{ */
     306/** Original format (ext2). */
     307#define EXT_SB_REV_ORIG                       0
     308/** Inodes have dynmic sizes. */
     309#define EXT_SB_REV_V2_DYN_INODE_SZ            1
     310/** @} */
     311
     312/** @name EXT_SB_FEAT_COMPAT_XXX - Compatible features which can be ignored when set
     313 * and not being supported.
     314 * @{ */
     315/** Directories can be preallocated. */
     316#define EXT_SB_FEAT_COMPAT_DIR_PREALLOC       RT_BIT_32(0)
     317/** Some sort of "imagic" inodes. */
     318#define EXT_SB_FEAT_COMPAT_IMAGIC_INODES      RT_BIT_32(1)
     319/** Filesystem has a journal. */
     320#define EXT_SB_FEAT_COMPAT_HAS_JOURNAL        RT_BIT_32(2)
     321/** Filesystem supports extended attributes. */
     322#define EXT_SB_FEAT_COMPAT_EXT_ATTR           RT_BIT_32(3)
     323/** Filesystem contains reserved group descriptor blocks for filesystem expansion. */
     324#define EXT_SB_FEAT_COMPAT_RESIZE_INODE       RT_BIT_32(4)
     325/** Filesystem contains directory indices. */
     326#define EXT_SB_FEAT_COMPAT_DIR_INDEX          RT_BIT_32(5)
     327/** Lazy block group - not used. */
     328#define EXT_SB_FEAT_COMPAT_LAZY_BG            RT_BIT_32(6)
     329/** Exclude inode - not used. */
     330#define EXT_SB_FEAT_COMPAT_EXCLUDE_INODE      RT_BIT_32(7)
     331/** Exclude bitmap - not used. */
     332#define EXT_SB_FEAT_COMPAT_EXCLUDE_BITMAP     RT_BIT_32(8)
     333/** Sparse super blocks, super block contains pointers to block groups
     334 * containing backups of the superblock. */
     335#define EXT_SB_FEAT_COMPAT_SPARSE_SUPER2      RT_BIT_32(9)
     336/** @} */
     337
     338/** @name EXT_SB_FEAT_INCOMPAT_XXX - Incompatible features which cause a mounting
     339 * error when set and not being supported.
     340 * @{ */
     341/** Filesystem contains compressed files. */
     342#define EXT_SB_FEAT_INCOMPAT_COMPRESSION      RT_BIT_32(0)
     343/** Directory entries contain a file type. */
     344#define EXT_SB_FEAT_INCOMPAT_DIR_FILETYPE     RT_BIT_32(1)
     345/** Filesystem needs recovery. */
     346#define EXT_SB_FEAT_INCOMPAT_RECOVER          RT_BIT_32(2)
     347/** The journal is recorded on a separate device. */
     348#define EXT_SB_FEAT_INCOMPAT_JOURNAL_DEV      RT_BIT_32(3)
     349/** Filesystem uses meta block groups. */
     350#define EXT_SB_FEAT_INCOMPAT_META_BG          RT_BIT_32(4)
     351/** Files in the filesystem use extents. */
     352#define EXT_SB_FEAT_INCOMPAT_EXTENTS          RT_BIT_32(6)
     353/** Filesystem uses 64bit offsets. */
     354#define EXT_SB_FEAT_INCOMPAT_64BIT            RT_BIT_32(7)
     355/** Filesystem requires multiple mount preotection. */
     356#define EXT_SB_FEAT_INCOMPAT_MMP              RT_BIT_32(8)
     357/** Filesystem uses flexible block groups. */
     358#define EXT_SB_FEAT_INCOMPAT_FLEX_BG          RT_BIT_32(9)
     359/** Inodes can be used to store large extended attribute values. */
     360#define EXT_SB_FEAT_INCOMPAT_EXT_ATTR_INODE   RT_BIT_32(10)
     361/** Data is contained in directory entries. */
     362#define EXT_SB_FEAT_INCOMPAT_DIRDATA          RT_BIT_32(12)
     363/** Metadata checksum seed is stored in the super block. */
     364#define EXT_SB_FEAT_INCOMPAT_CSUM_SEED        RT_BIT_32(13)
     365/** Directories can be larger than 2GiB or contain a 3-level HTree. */
     366#define EXT_SB_FEAT_INCOMPAT_LARGE_DIR        RT_BIT_32(14)
     367/** Data is inlined in the inode. */
     368#define EXT_SB_FEAT_INCOMPAT_INLINE_DATA      RT_BIT_32(15)
     369/** Encrypted inodes are present on the filesystem. */
     370#define EXT_SB_FEAT_INCOMPAT_ENCRYPT          RT_BIT_32(16)
     371/** @} */
     372
     373/** @name EXT_SB_FEAT_COMPAT_RO_XXX - Backward compatible features when mounted readonly
     374 * @{ */
     375/** Sparse superblocks. */
     376#define EXT_SB_FEAT_COMPAT_RO_SPARSE_SUPER    RT_BIT_32(0)
     377/** There is at least one large file (> 2GiB). */
     378#define EXT_SB_FEAT_COMPAT_RO_LARGE_FILE      RT_BIT_32(1)
     379/** Actually not used in the Linux kernel and e2fprogs. */
     380#define EXT_SB_FEAT_COMPAT_RO_BTREE_DIR       RT_BIT_32(2)
     381/** Filesystem contains files which sizes are not represented as a multiple of 512 byte sectors
     382 * but logical blocks instead. */
     383#define EXT_SB_FEAT_COMPAT_RO_HUGE_FILE       RT_BIT_32(3)
     384/** Group descriptors have checksums embedded */
     385#define EXT_SB_FEAT_COMPAT_RO_GDT_CHSKUM      RT_BIT_32(4)
     386/** Subdirectory limit of 32000 doesn't apply. The link count is set to 1 if beyond 64999. */
     387#define EXT_SB_FEAT_COMPAT_RO_DIR_NLINK       RT_BIT_32(5)
     388/** Inodes can contain extra data. */
     389#define EXT_SB_FEAT_COMPAT_RO_EXTRA_INODE_SZ  RT_BIT_32(6)
     390/** There is at least one snapshot on the filesystem. */
     391#define EXT_SB_FEAT_COMPAT_RO_HAS_SNAPSHOTS   RT_BIT_32(7)
     392/** Quotas are enabled for this filesystem. */
     393#define EXT_SB_FEAT_COMPAT_RO_QUOTA           RT_BIT_32(8)
     394/** The bigalloc feature is enabled, file extents are tracked in units of clusters
     395 * instead of blocks. */
     396#define EXT_SB_FEAT_COMPAT_RO_BIGALLOC        RT_BIT_32(9)
     397/** Metadata contains checksums. */
     398#define EXT_SB_FEAT_COMPAT_RO_METADATA_CHKSUM RT_BIT_32(10)
     399/** Filesystem supports replicas. */
     400#define EXT_SB_FEAT_COMPAT_RO_REPLICA         RT_BIT_32(11)
     401/** Filesystem is readonly. */
     402#define EXT_SB_FEAT_COMPAT_RO_READONLY        RT_BIT_32(12)
     403/** Filesystem tracks project quotas. */
     404#define EXT_SB_FEAT_COMPAT_RO_PROJECT         RT_BIT_32(13)
     405/** @} */
     406
     407/** @name EXT_SB_HASH_VERSION_DEF_XXX - Default hash algorithm used
     408 * @{ */
     409/** Legacy. */
     410#define EXT_SB_HASH_VERSION_DEF_LEGACY               0
     411/** Half MD4. */
     412#define EXT_SB_HASH_VERSION_DEF_HALF_MD4             1
     413/** Tea. */
     414#define EXT_SB_HASH_VERSION_DEF_TEA                  2
     415/** Unsigned legacy. */
     416#define EXT_SB_HASH_VERSION_DEF_LEGACY_UNSIGNED      3
     417/** Unsigned half MD4. */
     418#define EXT_SB_HASH_VERSION_DEF_HALF_MD4_UNSIGNED    4
     419/** Unsigned tea. */
     420#define EXT_SB_HASH_VERSION_DEF_TEA_UNSIGNED         5
     421/** @} */
     422
     423/** @name EXT_SB_MNT_OPTS_DEF_XXX - Default mount options
     424 * @{ */
     425/** Print debugging information on (re)mount. */
     426#define EXT_SB_MNT_OPTS_DEF_DEBUG                    RT_BIT_32(0)
     427/** Created files take the group ID ofthe containing directory. */
     428#define EXT_SB_MNT_OPTS_DEF_BSDGROUPS                RT_BIT_32(1)
     429/** Support userspace extended attributes. */
     430#define EXT_SB_MNT_OPTS_DEF_XATTR_USER               RT_BIT_32(2)
     431/** Support POSIX access control lists. */
     432#define EXT_SB_MNT_OPTS_DEF_ACL                      RT_BIT_32(3)
     433/** Do not support 32bit UIDs. */
     434#define EXT_SB_MNT_OPTS_DEF_UID16                    RT_BIT_32(4)
     435/** All data and metadata are committed to the journal. */
     436#define EXT_SB_MNT_OPTS_DEF_JMODE_DATA               RT_BIT_32(5)
     437/** All data are flushed to the disk before metadata are committed to the journal. */
     438#define EXT_SB_MNT_OPTS_DEF_JMODE_ORDERED            RT_BIT_32(6)
     439/** Data ordering not preserved, data may be written after metadata has been written. */
     440#define EXT_SB_MNT_OPTS_DEF_JMODE_WBACK              (EXT_SB_MNT_OPTS_DEF_JMODE_DATA | EXT_SB_MNT_OPTS_DEF_JMODE_ORDERED)
     441/** No write flushes. */
     442#define EXT_SB_MNT_OPTS_DEF_NOBARRIER                RT_BIT_32(8)
     443/** Track metadata blocks on the filesystem not being used as data blocks. */
     444#define EXT_SB_MNT_OPTS_DEF_BLOCK_VALIDITY           RT_BIT_32(9)
     445/** Enables TRIM/DISCARD support. */
     446#define EXT_SB_MNT_OPTS_DEF_DISCARD                  RT_BIT_32(10)
     447/** Disable delayed allocation. */
     448#define EXT_SB_MNT_OPTS_DEF_NODELALLOC               RT_BIT_32(11)
     449/** @} */
     450
     451/** @name EXT_SB_F_XXX - Superblock flags
     452 * @{ */
     453/** Signed directory hash used. */
     454#define EXT_SB_F_SIGNED_DIR_HASH                 RT_BIT_32(0)
     455/** Unsigned directory hash used. */
     456#define EXT_SB_F_UNSIGNED_DIR_HASH               RT_BIT_32(1)
     457/** Only used to test development code. */
     458#define EXT_SB_F_DEV_CODE                        RT_BIT_32(3)
     459/** @} */
     460
     461/** @name EXT_SB_ENCRYPT_ALGO_XXX - Group descriptor flags
     462 * @{ */
     463/** Invalid encryption algorithm. */
     464#define EXT_SB_ENCRYPT_ALGO_INVALID                  0
     465/** 256-bit AES in XTS mode. */
     466#define EXT_SB_ENCRYPT_ALGO_256BIT_AES_XTS           1
     467/** 256-bit AES in GCM mode. */
     468#define EXT_SB_ENCRYPT_ALGO_256BIT_AES_GCM           2
     469/** 256-bit AES in CBC mode. */
     470#define EXT_SB_ENCRYPT_ALGO_256BIT_AES_CBC           3
     471/** @} */
     472
    111473
    112474/**
    113  * Block group descriptor.
    114  */
    115 typedef struct EXTBLOCKGROUPDESC
     475 * Block group descriptor (32byte version).
     476 */
     477typedef struct EXTBLOCKGROUPDESC32
    116478{
    117     /** Block address of the block bitmap. */
    118     uint32_t    offBlockBitmap;
    119     /** Block address of the inode bitmap. */
    120     uint32_t    offInodeBitmap;
    121     /** Start block address of the inode table. */
    122     uint32_t    offInodeTable;
    123     /** Number of unallocated blocks in group. */
    124     uint16_t    cBlocksUnallocated;
    125     /** Number of unallocated inodes in group. */
    126     uint16_t    cInodesUnallocated;
    127     /** Number of directories in the group. */
    128     uint16_t    cDirectories;
    129     /** Padding. */
    130     uint16_t    u16Padding;
    131     /** Reserved. */
    132     uint8_t     abReserved[12];
    133 } EXTBLOCKGROUPDESC;
    134 AssertCompileSize(EXTBLOCKGROUPDESC, 32);
     479    /** 0x00: Block address of the block bitmap (low 32bits). */
     480    uint32_t    offBlockBitmapLow;
     481    /** 0x04: Block address of the inode bitmap (low 32bits). */
     482    uint32_t    offInodeBitmapLow;
     483    /** 0x08: Start block address of the inode table (low 32bits). */
     484    uint32_t    offInodeTableLow;
     485    /** 0x0c: Number of unallocated blocks in group (low 16bits). */
     486    uint16_t    cBlocksFreeLow;
     487    /** 0x0e: Number of unallocated inodes in group (low 16bits). */
     488    uint16_t    cInodesFreeLow;
     489    /** 0x10: Number of directories in the group (low 16bits). */
     490    uint16_t    cDirectoriesLow;
     491    /** 0x12: Flags (EXT_GROUP_DESC_F_XXX). */
     492    uint16_t    fFlags;
     493    /** 0x14: Location of snapshot exclusion bitmap (lower 32bits) */
     494    uint32_t    offSnapshotExclBitmapLow;
     495    /** 0x18: Block bitmap checksum (lower 16bits). */
     496    uint16_t    u16ChksumBlockBitmapLow;
     497    /** 0x1a: Inode bitmap checksum (lower 16bits). */
     498    uint16_t    u16ChksumInodeBitmapLow;
     499    /** 0x1c: Unused inode entry count in the groups inode table (lower 16bits).*/
     500    uint16_t    cInodeTblUnusedLow;
     501    /** 0x1e: Group descriptor checksum. */
     502    uint16_t    u16Chksum;
     503} EXTBLOCKGROUPDESC32;
     504AssertCompileSize(EXTBLOCKGROUPDESC32, 32);
    135505/** Pointer to an ext block group descriptor. */
    136 typedef EXTBLOCKGROUPDESC *PEXTBLOCKGROUPDESC;
     506typedef EXTBLOCKGROUPDESC32 *PEXTBLOCKGROUPDESC32;
     507
     508/**
     509 * Block group descriptor (64byte version).
     510 */
     511typedef struct EXTBLOCKGROUPDESC64
     512{
     513    /** 0x00: Embedded 32 byte descriptor. */
     514    EXTBLOCKGROUPDESC32    v32;
     515    /** 0x20: Location of block bitmap (upper 32bits). */
     516    uint32_t    offBlockBitmapHigh;
     517    /** 0x24: Location of inode bitmap (upper 32bits). */
     518    uint32_t    offInodeBitmapHigh;
     519    /** 0x28: Location of inode table (upper 32bits). */
     520    uint32_t    offInodeTableHigh;
     521    /** 0x2c: Number of unallocated blocks (upper 16bits). */
     522    uint16_t    cBlocksFreeHigh;
     523    /** 0x2e: Number of unallocated inodes (upper 16bits). */
     524    uint16_t    cInodesFreeHigh;
     525    /** 0x30: Number of directories in the group (upper 16bits). */
     526    uint16_t    cDirectoriesHigh;
     527    /** 0x32: Unused inode entry count in the groups inode table (upper 16bits).*/
     528    uint16_t    cInodeTblUnusedHigh;
     529    /** 0x34: Location of snapshot exclusion bitmap (upper 32bits) */
     530    uint32_t    offSnapshotExclBitmapHigh;
     531    /** 0x38: Block bitmap checksum (upper 16bits). */
     532    uint16_t    u16ChksumBlockBitmapHigh;
     533    /** 0x3a: Inode bitmap checksum (upper 16bits). */
     534    uint16_t    u16ChksumInodeBitmapHigh;
     535    /** 0x3c: Padding to 64 bytes. */
     536    uint32_t    u64Padding;
     537} EXTBLOCKGROUPDESC64;
     538AssertCompileSize(EXTBLOCKGROUPDESC64, 64);
     539/** Pointer to an ext block group descriptor. */
     540typedef EXTBLOCKGROUPDESC64 *PEXTBLOCKGROUPDESC64;
     541
     542/** @name EXT_GROUP_DESC_F_XXX - Group descriptor flags
     543 * @{ */
     544/** Inode table and bitmaps are not initialized. */
     545#define EXT_GROUP_DESC_F_INODE_UNINIT                RT_BIT_16(0)
     546/** Block bitmap is not initialized. */
     547#define EXT_GROUP_DESC_F_BLOCK_UNINIT                RT_BIT_16(1)
     548/** Inode table is zeroed. */
     549#define EXT_GROUP_DESC_F_INODE_ZEROED                RT_BIT_16(2)
     550/** @} */
     551
     552
     553/**
     554 * Inode table entry (standard 128 byte version).
     555 */
     556typedef struct EXTINODE
     557{
     558    /** 0x00: File mode (EXT_INODE_FILE_MODE_XXX). */
     559    uint16_t    fMode;
     560    /** 0x02: Owner UID (lower 16bits). */
     561    uint16_t    uUidLow;
     562    /** 0x04: Size in bytes (lower 32bits). */
     563    uint32_t    cbSizeLow;
     564    /** 0x08: Last access time in seconds since epoch. */
     565    uint32_t    u32TimeLastAccess;
     566    /** 0x0c: Last inode change time in seconds since epoch. */
     567    uint32_t    u32TimeLastChange;
     568    /** 0x10: Last data modification time in seconds since epoch. */
     569    uint32_t    u32TimeLastModification;
     570    /** 0x14: Deletion time in seconds since epoch. */
     571    uint32_t    u32TimeDeletion;
     572    /** 0x18: Group ID (lower 16bits). */
     573    uint16_t    uGidLow;
     574    /** 0x1a: Hard link count. */
     575    uint16_t    cHardLinks;
     576    /** 0x1c: Block count (lower 32bits). */
     577    uint32_t    cBlocksLow;
     578    /** 0x20: Inode flags. */
     579    uint32_t    fFlags;
     580    /** 0x24: Operating system dependent data. */
     581    union
     582    {
     583        /** Linux: Inode version. */
     584        uint32_t    u32LnxVersion;
     585    } Osd1;
     586    /** 0x28: Block map or extent tree. */
     587    uint32_t    au32Block[15];
     588    /** 0x64: File version. */
     589    uint32_t    u32Version;
     590    /** 0x68: Extended attribute control block (lower 32bits). */
     591    uint32_t    offExtAttrLow;
     592    /** 0x6c: File/directory size (upper 32bits). */
     593    uint32_t    cbSizeHigh;
     594    /** 0x70: Fragment address (obsolete). */
     595    uint32_t    u32FragmentAddrObs;
     596    /** 0x74: Operating system dependent data 2. */
     597    union
     598    {
     599        /** Linux related data. */
     600        struct
     601        {
     602            /** 0x00: Block count (upper 16bits). */
     603            uint16_t    cBlocksHigh;
     604            /** 0x02: Extended attribute block location (upper 16bits). */
     605            uint16_t    offExtAttrHigh;
     606            /** 0x04: Owner UID (upper 16bits). */
     607            uint16_t    uUidHigh;
     608            /** 0x06: Group ID (upper 16bits). */
     609            uint16_t    uGidHigh;
     610            /** 0x08: Inode checksum (lower 16bits). */
     611            uint16_t    u16ChksumLow;
     612            /** 0x0a: Reserved */
     613            uint16_t    u16Rsvd;
     614        } Lnx;
     615    } Osd2;
     616} EXTINODE;
     617AssertCompileSize(EXTINODE, 128);
     618/** Pointer to an inode. */
     619typedef EXTINODE *PEXTINODE;
     620/** Pointer to a const inode. */
     621typedef const EXTINODE *PCEXTINODE;
     622
     623/**
     624 * Extra inode data (coming right behind the fixed inode data).
     625 */
     626typedef struct EXTINODEEXTRA
     627{
     628    /** 0x80: Size of the extra inode data in bytes. */
     629    uint16_t    cbInodeExtra;
     630    /** 0x82: Inode checksum (upper 16bits.) */
     631    uint16_t    u16ChksumHigh;
     632    /** 0x84: Last inode change time, extra time bits for sub-second precision. */
     633    uint32_t    u32ExtraTimeLastChange;
     634    /** 0x88: Last data modification time, extra time bits for sub-second precision. */
     635    uint32_t    u32ExtraTimeLastModification;
     636    /** 0x8c: Last access time, extra time bits for sub-second precision. */
     637    uint32_t    u32ExtraTimeLastAccess;
     638    /** 0x90: File creation time in seconds since epoch. */
     639    uint32_t    u32TimeCreation;
     640    /** 0x94: File creation time, extra time bits for sub-second precision. */
     641    uint32_t    u32ExtraTimeCreation;
     642    /** 0x98: Version number (upper 32bits). */
     643    uint32_t    u32VersionHigh;
     644    /** 0x9c: Project ID. */
     645    uint32_t    u32ProjectId;
     646} EXTINODEEXTRA;
     647/** Pointer to extra inode data. */
     648typedef EXTINODEEXTRA *PEXTINODEEXTRA;
     649/** Pointer to a const extra inode data. */
     650typedef const EXTINODEEXTRA *PCEXTINODEEXTRA;
     651
     652/** @name EXT_INODE_MODE_XXX - File mode
     653 * @{ */
     654/** Others can execute the file. */
     655#define EXT_INODE_MODE_EXEC_OTHER                    RT_BIT_16(0)
     656/** Others can write to the file. */
     657#define EXT_INODE_MODE_WRITE_OTHER                   RT_BIT_16(1)
     658/** Others can read the file. */
     659#define EXT_INODE_MODE_READ_OTHER                    RT_BIT_16(2)
     660/** Members of the same group can execute the file. */
     661#define EXT_INODE_MODE_EXEC_GROUP                    RT_BIT_16(3)
     662/** Members of the same group can write to the file. */
     663#define EXT_INODE_MODE_WRITE_GROUP                   RT_BIT_16(4)
     664/** Members of the same group can read the file. */
     665#define EXT_INODE_MODE_READ_GROUP                    RT_BIT_16(5)
     666/** Owner can execute the file. */
     667#define EXT_INODE_MODE_EXEC_OWNER                    RT_BIT_16(6)
     668/** Owner can write to the file. */
     669#define EXT_INODE_MODE_WRITE_OWNER                   RT_BIT_16(7)
     670/** Owner can read the file. */
     671#define EXT_INODE_MODE_READ_OWNER                    RT_BIT_16(8)
     672/** Sticky file mode. */
     673#define EXT_INODE_MODE_STICKY                        RT_BIT_16(9)
     674/** File is set GID. */
     675#define EXT_INODE_MODE_SET_GROUP_ID                  RT_BIT_16(10)
     676/** File is set UID. */
     677#define EXT_INODE_MODE_SET_USER_ID                   RT_BIT_16(11)
     678/** @} */
     679
     680/** @name EXT_INODE_MODE_TYPE_XXX - File type
     681 * @{ */
     682/** Inode represents a FIFO. */
     683#define EXT_INODE_MODE_TYPE_FIFO                     UINT16_C(0x1000)
     684/** Inode represents a character device. */
     685#define EXT_INODE_MODE_TYPE_CHAR                     UINT16_C(0x2000)
     686/** Inode represents a directory. */
     687#define EXT_INODE_MODE_TYPE_DIR                      UINT16_C(0x4000)
     688/** Inode represents a block device. */
     689#define EXT_INODE_MODE_TYPE_BLOCK                    UINT16_C(0x6000)
     690/** Inode represents a regular file. */
     691#define EXT_INODE_MODE_TYPE_REGULAR                  UINT16_C(0x8000)
     692/** Inode represents a symlink. */
     693#define EXT_INODE_MODE_TYPE_SYMLINK                  UINT16_C(0xa000)
     694/** Inode represents a socket. */
     695#define EXT_INODE_MODE_TYPE_SOCKET                   UINT16_C(0xc000)
     696/** @} */
     697
     698/** @name EXT_INODE_F_XXX - Inode flags
     699 * @{ */
     700/** Inode requires secure erase on deletion. */
     701#define EXT_INODE_F_SECURE_ERASE                     RT_BIT_32(0)
     702/** Inode should be preserved for undeletion during deletion. */
     703#define EXT_INODE_F_UNDELETE                         RT_BIT_32(1)
     704/** Inode contains compressed data. */
     705#define EXT_INODE_F_COMPRESSED                       RT_BIT_32(2)
     706/** All writes to this inode must be synchronous. */
     707#define EXT_INODE_F_SYNCHRONOUS                      RT_BIT_32(3)
     708/** Inode is immutable. */
     709#define EXT_INODE_F_IMMUTABLE                        RT_BIT_32(4)
     710/** Inode is append only. */
     711#define EXT_INODE_F_APPEND_ONLY                      RT_BIT_32(5)
     712/** Inode should not be dumped via dump(1). */
     713#define EXT_INODE_F_NO_DUMP                          RT_BIT_32(6)
     714/** Access time is not updated. */
     715#define EXT_INODE_F_NO_ACCESS_TIME                   RT_BIT_32(7)
     716/** Dirty compressed file. */
     717#define EXT_INODE_F_DIRTY_COMPRESSED                 RT_BIT_32(8)
     718/** Inode has one or more compressed clusters. */
     719#define EXT_INODE_F_COMPRESSED_BLOCK                 RT_BIT_32(9)
     720/** Inode should not be compressed. */
     721#define EXT_INODE_F_NO_COMPRESSION                   RT_BIT_32(10)
     722/** Inode is encrypted. */
     723#define EXT_INODE_F_ENCRYPTED                        RT_BIT_32(11)
     724/** Directory has hashed indexes. */
     725#define EXT_INODE_F_DIR_HASHED_INDEX                 RT_BIT_32(12)
     726/** AFS magic directory. */
     727#define EXT_INODE_F_IMAGIC                           RT_BIT_32(13)
     728/** Data must always be written through the journal. */
     729#define EXT_INODE_F_JOURNAL_DATA                     RT_BIT_32(14)
     730/** File tail should not be merged. */
     731#define EXT_INODE_F_NOTAIL                           RT_BIT_32(15)
     732/** All directory entry data should be written synchronously. */
     733#define EXT_INODE_F_DIR_SYNCHRONOUS                  RT_BIT_32(16)
     734/** Top of directory hierarchy. */
     735#define EXT_INODE_F_TOP_DIRECTORY                    RT_BIT_32(17)
     736/** Inode is a huge file. */
     737#define EXT_INODE_F_HUGE_FILE                        RT_BIT_32(18)
     738/** Inode uses extents. */
     739#define EXT_INODE_F_EXTENTS                          RT_BIT_32(19)
     740/** Inode stores a large extended attribute value in its data blocks. */
     741#define EXT_INODE_F_EXT_ATTR_INODE                   RT_BIT_32(20)
     742/** File has blocks allocated past end of file. */
     743#define EXT_INODE_F_ALLOC_BLOCKS_EOF                 RT_BIT_32(21)
     744/** Inode is a snapshot. */
     745#define EXT_INODE_F_SNAPSHOT                         RT_BIT_32(22)
     746/** Snapshot is being deleted. */
     747#define EXT_INODE_F_SNAPSHOT_DELETED                 RT_BIT_32(23)
     748/** Snapshot shrink has completed. */
     749#define EXT_INODE_F_SNAPSHOT_SHRUNK                  RT_BIT_32(24)
     750/** Inode contains inline data. */
     751#define EXT_INODE_F_INLINE_DATA                      RT_BIT_32(25)
     752/** Children are created with the same project ID. */
     753#define EXT_INODE_F_PROJECT_ID_INHERIT               RT_BIT_32(26)
     754/** Reserved for ext4 library. */
     755#define EXT_INODE_F_RESERVED_LIBRARY                 RT_BIT_32(27)
     756/** @} */
     757
     758
     759/**
     760 * Extent tree header.
     761 */
     762typedef struct EXTEXTENTHDR
     763{
     764    /** 0x00: Magic number for identification. */
     765    uint16_t    u16Magic;
     766    /** 0x02: Number of valid entries following. */
     767    uint16_t    cEntries;
     768    /** 0x04: Maxmimum number of entries that could follow. */
     769    uint16_t    cMax;
     770    /** 0x06: Depth of this extent node in the tree. */
     771    uint16_t    uDepth;
     772    /** 0x08: Generation of the tree (not used by standard ext4). */
     773    uint32_t    cGeneration;
     774} EXTEXTENTHDR;
     775AssertCompileSize(EXTEXTENTHDR, 12);
     776/** Pointer to a extent tree header. */
     777typedef EXTEXTENTHDR *PEXTEXTENTHDR;
     778/** Pointer to a const extent tree header. */
     779typedef const EXTEXTENTHDR *PCEXTEXTENTHDR;
     780
     781/** Magic number identifying an extent header. */
     782#define EXT_EXTENT_HDR_MAGIC                         UINT16_C(0xf30a)
     783
     784
     785/**
     786 * Extent tree index node.
     787 */
     788typedef struct EXTEXTENTIDX
     789{
     790    /** 0x00: Start file block  this node covers. */
     791    uint32_t    iBlock;
     792    /** 0x04: Block number of child extent node (lower 32bits). */
     793    uint32_t    offChildLow;
     794    /** 0x08: Block number of child extent node (upper 16bits). */
     795    uint16_t    offChildHigh;
     796    /** 0x0a: Reserved. */
     797    uint16_t    u16Rsvd;
     798} EXTEXTENTIDX;
     799AssertCompileSize(EXTEXTENTIDX, 12);
     800/** Pointer to an extent tree index node. */
     801typedef EXTEXTENTIDX *PEXTEXTENTIDX;
     802/** Pointer to a const extent tree index node. */
     803typedef const EXTEXTENTIDX *PCEXTEXTENTIDX;
     804
     805
     806/**
     807 * Extent tree leaf node.
     808 */
     809typedef struct EXTEXTENT
     810{
     811    /** 0x00: First file block number this extent covers. */
     812    uint32_t    iBlock;
     813    /** 0x04: Number of blocks covered by this extent. */
     814    uint16_t    cBlocks;
     815    /** 0x06: Block number this extent points to (upper 32bits). */
     816    uint16_t    offStartHigh;
     817    /** 0x08: Block number this extent points to (lower 32bits). */
     818    uint32_t    offStartLow;
     819} EXTEXTENT;
     820AssertCompileSize(EXTEXTENT, 12);
     821/** Pointer to a leaf node. */
     822typedef EXTEXTENT *PEXTEXTENT;
     823/** Pointer to a const leaf node. */
     824typedef const EXTEXTENT *PCEXTEXTENT;
     825
     826
     827/**
     828 * Directory entry.
     829 */
     830typedef struct EXTDIRENTRY
     831{
     832    /** 0x00: Inode number being referenced by this entry. */
     833    uint32_t    iInodeRef;
     834    /** 0x04: Record length of this directory entry in bytes (multiple of 4). */
     835    uint16_t    cbRecord;
     836    /** 0x06: Version dependent data. */
     837    union
     838    {
     839        /** Original. */
     840        struct
     841        {
     842            /** Name length in bytes (maximum 255). */
     843            uint16_t    cbName;
     844        } v1;
     845        /** Version 2. */
     846        struct
     847        {
     848            /** Name length in bytes (maximum 255). */
     849            uint8_t     cbName;
     850            /** File type (EXT_DIRENTRY_TYPE_XXX). */
     851            uint8_t     uType;
     852        } v2;
     853    } u;
     854    /** 0x08: File name - variable in size. */
     855    char        achName[1];
     856} EXTDIRENTRY;
     857/** Pointer to a directory entry. */
     858typedef EXTDIRENTRY *PEXTDIRENTRY;
     859/** Poiner to a const directory entry. */
     860typedef const EXTDIRENTRY *PCEXTDIRENTRY;
     861
     862/** @name EXT_DIRENTRY_TYPE_XXX - file type
     863 * @{ */
     864/** Entry is of unknown file type. */
     865#define EXT_DIRENTRY_TYPE_UNKNOWN                    0
     866/** Entry is regular file. */
     867#define EXT_DIRENTRY_TYPE_REGULAR                    1
     868/** Entry is another directory. */
     869#define EXT_DIRENTRY_TYPE_DIRECTORY                  2
     870/** Entry is a character device. */
     871#define EXT_DIRENTRY_TYPE_CHAR                       3
     872/** Entry is a block device. */
     873#define EXT_DIRENTRY_TYPE_BLOCK                      4
     874/** Entry is a FIFO. */
     875#define EXT_DIRENTRY_TYPE_FIFO                       5
     876/** Entry is a socket. */
     877#define EXT_DIRENTRY_TYPE_SOCKET                     6
     878/** Entry is a symlink. */
     879#define EXT_DIRENTRY_TYPE_SYMLINK                    7
     880/** Entry is a checksum and uses EXTDIRENTRYCHKSUM. */
     881#define EXT_DIRENTRY_TYPE_CHKSUM                     0xde
     882/** @} */
     883
     884
     885/**
     886 * Tail directory entry (for checksumming).
     887 */
     888typedef struct EXTDIRENTRYCHKSUM
     889{
     890    /** 0x00: Reserved, must be 0 (overlays with EXTDIRENTRY::iNodeRef). */
     891    uint32_t    u32Rsvd;
     892    /** 0x04: Record length (must be 12). */
     893    uint16_t    cbRecord;
     894    /** 0x06: Reserved (overlays with EXTDIRENTRY::u::v1::cbName). */
     895    uint8_t     u8Rsvd;
     896    /** 0x07: File type (must be 0xde). */
     897    uint8_t     uType;
     898    /** 0x08: Checksum. */
     899    uint32_t    u32Chksum;
     900} EXTDIRENTRYCHKSUM;
     901/** Pointer to a tail directory entry. */
     902typedef EXTDIRENTRYCHKSUM *PEXTDIRENTRYCHKSUM;
     903/** Pointer to const tail directory entry. */
     904typedef const EXTDIRENTRYCHKSUM *PCEXTDIRENTRYCHKSUM;
     905
     906
     907/** @} */
    137908
    138909#endif

  • trunk/src/VBox/Runtime/common/fs/extvfs.cpp

    r76221 r76256  
    126126    }
    127127
    128     uint64_t           offRead = (pThis->iSbBlock + 1) * pThis->cbBlock;
    129     EXTBLOCKGROUPDESC  BlkDesc;
     128    uint64_t            offRead = (pThis->iSbBlock + 1) * pThis->cbBlock;
     129    EXTBLOCKGROUPDESC32 BlkDesc;
    130130    int rc = RTVfsFileReadAt(pThis->hVfsBacking, offRead, &BlkDesc, sizeof(BlkDesc), NULL);
    131131    if (RT_SUCCESS(rc))
    … …  
    133133        pBlkGrpDesc->offStart = pThis->iSbBlock + (uint64_t)iBlkGrp * pThis->cBlocksPerGroup * pThis->cbBlock;
    134134        pBlkGrpDesc->offLast  = pBlkGrpDesc->offStart + pThis->cBlocksPerGroup * pThis->cbBlock;
    135         rc = RTVfsFileReadAt(pThis->hVfsBacking, BlkDesc.offBlockBitmap * pThis->cbBlock,
     135        rc = RTVfsFileReadAt(pThis->hVfsBacking, BlkDesc.offBlockBitmapLow * pThis->cbBlock,
    136136                             &pBlkGrpDesc->abBlockBitmap[0], cbBlockBitmap, NULL);
    137137    }
    … …  
    279279            /** @todo Convert to host endianess. */
    280280#endif
    281             if (SuperBlock.u16FilesystemState == EXT_STATE_ERRORS)
     281            if (SuperBlock.u16FilesystemState == EXT_SB_STATE_ERRORS)
    282282                rc = RTERRINFO_LOG_SET(pErrInfo, VERR_FILESYSTEM_CORRUPT, "EXT_STATE_ERRORS");
    283283            else
    284284            {
    285285                pThis->iSbBlock = SuperBlock.iBlockOfSuperblock;
    286                 pThis->cbBlock = 1024 << SuperBlock.cBitsShiftLeftBlockSize;
     286                pThis->cbBlock = 1024 << SuperBlock.cLogBlockSize;
    287287                pThis->cBlocksPerGroup = SuperBlock.cBlocksPerGroup;
    288                 pThis->cBlockGroups = SuperBlock.cBlocksTotal / pThis->cBlocksPerGroup;
     288                pThis->cBlockGroups = SuperBlock.cBlocksTotalLow / pThis->cBlocksPerGroup;
    289289
    290290                /* Load first block group descriptor. */

  • trunk/src/VBox/Runtime/common/vfs/vfsmount.cpp

    r76216 r76256  
    359359static bool rtVfsMountIsExt(PCEXTSUPERBLOCK pSuperBlock)
    360360{
    361     if (RT_LE2H_U16(pSuperBlock->u16Signature) != EXT_SIGNATURE)
    362         return false;
    363 
    364     uint32_t cShift = RT_LE2H_U32(pSuperBlock->cBitsShiftLeftBlockSize);
     361    if (RT_LE2H_U16(pSuperBlock->u16Signature) != EXT_SB_SIGNATURE)
     362        return false;
     363
     364    uint32_t cShift = RT_LE2H_U32(pSuperBlock->cLogBlockSize);
    365365    if (cShift > 54)
    366366    {
    367         Log2(("rtVfsMountIsExt: cBitsShiftLeftBlockSize=%#x: out of range\n", cShift));
    368         return false;
    369     }
    370 
    371     cShift = RT_LE2H_U32(pSuperBlock->cBitsShiftLeftFragmentSize);
     367        Log2(("rtVfsMountIsExt: cLogBlockSize=%#x: out of range\n", cShift));
     368        return false;
     369    }
     370
     371    cShift = RT_LE2H_U32(pSuperBlock->cLogClusterSize);
    372372    if (cShift > 54)
    373373    {
    374         Log2(("rtVfsMountIsExt: cBitsShiftLeftFragmentSize=%#x: out of range\n", cShift));
     374        Log2(("rtVfsMountIsExt: cLogClusterSize=%#x: out of range\n", cShift));
    375375        return false;
    376376    }
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