;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; ;; ;; Copyright (C) KolibriOS team 2013-2022. All rights reserved. ;; ;; Distributed under terms of the GNU General Public License ;; ;; ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; $Revision$ ; file types from stat.h S_IFMT = 0170000o ; These bits determine file type S_IFDIR = 0040000o ; Directory S_IFCHR = 0020000o ; Character device S_IFBLK = 0060000o ; Block device S_IFREG = 0100000o ; Regular file S_IFIFO = 0010000o ; FIFO S_IFLNK = 0120000o ; Symbolic link S_IFSOCK = 0140000o ; Socket ; XFS null constant: empty fields must be all ones, not zeros! XFS_NULL = -1 XFS_SECT_SB = 0 ; signatures of file system structures XFS_AGF_MAGIC = 'XAGF' XFS_DINODE_MAGIC = 'IN' XFS_BMAP_MAGIC = 'BMAP' XFS_DA_NODE_MAGIC = 0xbefe XFS_DIR2_LEAF1_MAGIC = 0xf1d2 XFS_DIR2_LEAFN_MAGIC = 0xffd2 XFS_DIR2_BLOCK_MAGIC = 'XD2B' XFS_DIR2_DATA_MAGIC = 'XD2D' XFS_BMAP3_MAGIC = 'BMA3' XFS_DA3_NODE_MAGIC = 0xbe3e ; non-leaf blocks XFS_DIR3_LEAF1_MAGIC = 0xf13d ; v3 dir single blks XFS_DIR3_LEAFN_MAGIC = 0xff3d ; v3 dir multi blks XFS_DIR3_BLOCK_MAGIC = 'XDB3' ; single block dirs XFS_DIR3_DATA_MAGIC = 'XDD3' ; multiblock dirs XFS_SB_MAGIC = 'XFSB' XFS_SB_VERSION_NUMBITS = 0x000f XFS_SB_VERSION_ALLFBITS = 0xfff0 XFS_SB_VERSION_REALFBITS = 0x0ff0 XFS_SB_VERSION_ATTRBIT = 0x0010 XFS_SB_VERSION_NLINKBIT = 0x0020 XFS_SB_VERSION_QUOTABIT = 0x0040 XFS_SB_VERSION_ALIGNBIT = 0x0080 XFS_SB_VERSION_DALIGNBIT = 0x0100 XFS_SB_VERSION_SHAREDBIT = 0x0200 XFS_SB_VERSION_LOGV2BIT = 0x0400 XFS_SB_VERSION_SECTORBIT = 0x0800 XFS_SB_VERSION_EXTFLGBIT = 0x1000 XFS_SB_VERSION_DIRV2BIT = 0x2000 XFS_SB_VERSION_BORGBIT = 0x4000 ; ASCII only case-insensitive XFS_SB_VERSION_MOREBITSBIT = 0x8000 XFS_SB_VERSION_SUPPORTED = XFS_SB_VERSION_NUMBITS OR \ XFS_SB_VERSION_ATTRBIT OR \ XFS_SB_VERSION_NLINKBIT OR \ XFS_SB_VERSION_QUOTABIT OR \ XFS_SB_VERSION_ALIGNBIT OR \ XFS_SB_VERSION_LOGV2BIT OR \ XFS_SB_VERSION_SECTORBIT OR \ XFS_SB_VERSION_EXTFLGBIT OR \ XFS_SB_VERSION_DIRV2BIT OR \ XFS_SB_VERSION_MOREBITSBIT XFS_SB_VERSION2_RESERVED1BIT = 0x00000001 XFS_SB_VERSION2_LAZYSBCOUNTBIT = 0x00000002 ; Superblk counters XFS_SB_VERSION2_RESERVED4BIT = 0x00000004 XFS_SB_VERSION2_ATTR2BIT = 0x00000008 ; Inline attr rework XFS_SB_VERSION2_PARENTBIT = 0x00000010 ; parent pointers in xattr XFS_SB_VERSION2_PROJID32BIT = 0x00000080 ; 32 bit project id XFS_SB_VERSION2_CRCBIT = 0x00000100 ; metadata CRCs XFS_SB_VERSION2_FTYPE = 0x00000200 ; inode type in dir XFS_SB_VERSION2_SUPPORTED = XFS_SB_VERSION2_LAZYSBCOUNTBIT OR \ XFS_SB_VERSION2_ATTR2BIT OR \ XFS_SB_VERSION2_PARENTBIT OR \ XFS_SB_VERSION2_PROJID32BIT OR \ XFS_SB_VERSION2_CRCBIT OR \ XFS_SB_VERSION2_FTYPE XFS_SB_FEAT_INCOMPAT_FTYPE = 1 ; filetype in dirent XFS_SB_FEAT_INCOMPAT_SPINODES = 2 ; sparse inode chunks XFS_SB_FEAT_INCOMPAT_META_UUID = 4 ; metadata UUID XFS_SB_FEAT_INCOMPAT_BIGTIME = 8 ; large timestamps XFS_SB_FEAT_INCOMPAT_SUPPORTED = XFS_SB_FEAT_INCOMPAT_FTYPE OR \ XFS_SB_FEAT_INCOMPAT_SPINODES OR \ XFS_SB_FEAT_INCOMPAT_META_UUID OR \ XFS_SB_FEAT_INCOMPAT_BIGTIME ; bitfield lengths for packed extent ; MSB to LSB / left to right BMBT_EXNTFLAG_BITLEN = 1 BMBT_STARTOFF_BITLEN = 54 BMBT_STARTBLOCK_BITLEN = 52 BMBT_BLOCKCOUNT_BITLEN = 21 XFS_DIR2_DATA_ALIGN_LOG = 3 XFS_DIR2_DATA_ALIGN = 1 SHL XFS_DIR2_DATA_ALIGN_LOG XFS_DIR2_SPACE_SIZE = (1 SHL (32 + XFS_DIR2_DATA_ALIGN_LOG)) XFS_DIR2_DATA_OFFSET = 0*XFS_DIR2_SPACE_SIZE XFS_DIR2_LEAF_OFFSET = 1*XFS_DIR2_SPACE_SIZE XFS_DIR2_FREE_OFFSET = 2*XFS_DIR2_SPACE_SIZE ; data section magic constants for directories (xfs_dir2_data.h) XFS_DIR2_DATA_FD_COUNT = 3 ; valid inode formats ; enum xfs_dinode_fmt (xfs_dinode.h) XFS_DINODE_FMT_DEV = 0 XFS_DINODE_FMT_LOCAL = 1 XFS_DINODE_FMT_EXTENTS = 2 XFS_DINODE_FMT_BTREE = 3 XFS_DINODE_FMT_UUID = 4 ; size of the unlinked inode hash table in the agi XFS_AGI_UNLINKED_BUCKETS = 64 ; possible extent states ; enum xfs_exntst_t (xfs_bmap_btree.h) XFS_EXT_NORM = 0 XFS_EXT_UNWRITTEN = 1 XFS_EXT_DMAPI_OFFLINE = 2 XFS_EXT_INVALID = 3 ; values for inode core flags / di_flags (xfs_dinode.h) XFS_DIFLAG_REALTIME_BIT = 0 ; file's blocks come from rt area XFS_DIFLAG_PREALLOC_BIT = 1 ; file space has been preallocated XFS_DIFLAG_NEWRTBM_BIT = 2 ; for rtbitmap inode, new format XFS_DIFLAG_NODUMP_BIT = 7 ; do not dump XFS_DIFLAG_REALTIME = (1 SHL XFS_DIFLAG_REALTIME_BIT) XFS_DIFLAG_PREALLOC = (1 SHL XFS_DIFLAG_PREALLOC_BIT) XFS_DIFLAG_NEWRTBM = (1 SHL XFS_DIFLAG_NEWRTBM_BIT) XFS_DIFLAG_NODUMP = (1 SHL XFS_DIFLAG_NODUMP_BIT) ; superblock _ondisk_ structure (xfs_sb.h) ; this is _not_ the partition structure ; for XFS partition structure see XFS below struct xfs_sb sb_magicnum dd ? ; signature, must be XFS_SB_MAGIC sb_blocksize dd ? ; block is the minimal file system unit, in bytes sb_dblocks DQ ? ; number of data blocks sb_rblocks DQ ? ; number of realtime blocks sb_rextents DQ ? ; number of realtime extents sb_uuid rb 16 ; file system unique identifier sb_logstart DQ ? ; starting block of log (for internal journal) sb_rootino DQ ? ; root inode number sb_rbmino DQ ? ; bitmap inode for realtime extents sb_rsumino DQ ? ; summary inode for rt bitmap sb_rextsize dd ? ; realtime extent size, blocks sb_agblocks dd ? ; size of an allocation group (the last one may be smaller!) sb_agcount dd ? ; number of allocation groups sb_rbmblocks dd ? ; number of rt bitmap blocks sb_logblocks dd ? ; number of log blocks sb_versionnum dw ? ; header version sb_sectsize dw ? ; volume sector size in bytes sb_inodesize dw ? ; inode size, bytes sb_inopblock dw ? ; inodes per block sb_fname rb 12 ; inodes per block (aka label) sb_blocklog db ? ; log2 of sb_blocksize sb_sectlog db ? ; log2 of sb_blocksize sb_inodelog db ? ; log2 of sb_inodesize sb_inopblog db ? ; log2 of sb_inopblock sb_agblklog db ? ; log2 of sb_agblocks (rounded up!) sb_rextslog db ? ; log2 of sb_rextents sb_inprogress db ? ; mkfs is in progress, don't mount sb_imax_pct db ? ; max % of fs for inode space ; statistics sb_icount DQ ? ; allocated inodes sb_ifree DQ ? ; free inodes sb_fdblocks DQ ? ; free data blocks sb_frextents DQ ? ; free realtime extents sb_uquotino DQ ? ; user quota inode sb_gquotino DQ ? ; group quota inode sb_qflags dw ? ; quota flags sb_flags db ? ; misc. flags sb_shared_vn db ? ; shared version number sb_inoalignmt dd ? ; inode chunk alignment, fsblocks sb_unit dd ? ; stripe or raid unit sb_width dd ? ; stripe or raid width sb_dirblklog db ? ; log2 of dir block size (fsbs) sb_logsectlog db ? ; log2 of the log sector size sb_logsectsize dw ? ; sector size for the log, bytes sb_logsunit dd ? ; stripe unit size for the log sb_features2 dd ? ; additional feature bits sb_bad_features2 dd ? sb_features_compat dd ? sb_features_ro_compat dd ? sb_features_incompat dd ? sb_features_log_incompat dd ? sb_crc dd ? ; superblock crc sb_spino_align dd ? ; sparse inode chunk alignment sb_pquotino DQ ? ; project quota inode sb_lsn DQ ? ; last write sequence sb_meta_uuid rb 16 ; metadata file system unique id ends ; inode core structure: basic information about file struct xfs_dinode_core di_magic dw ? ; inode magic = XFS_DINODE_MAGIC di_mode dw ? ; mode and type of file di_version db ? ; inode version di_format db ? ; format of di_c data di_onlink dw ? ; old number of links to file di_uid dd ? ; owner's user id di_gid dd ? ; owner's group id di_nlink dd ? ; number of links to file di_projid dw ? ; owner's project id di_pad rb 8 ; unused, zeroed space di_flushiter dw ? ; incremented on flush di_atime DQ ; time last accessed di_mtime DQ ; time last modified di_ctime DQ ; time created/inode modified di_size DQ ? ; number of bytes in file di_nblocks DQ ? ; number of direct & btree blocks used di_extsize dd ? ; basic/minimum extent size for file di_nextents dd ? ; number of extents in data fork di_anextents dw ? ; number of extents in attribute fork di_forkoff db ? ; attr fork offs, <<3 for 64b align di_aformat db ? ; format of attr fork's data di_dmevmask dd ? ; DMIG event mask di_dmstate dw ? ; DMIG state info di_flags dw ? ; random flags, XFS_DIFLAG_... di_gen dd ? ; generation number di_next_unlinked dd ? ; unlinked but still used inode (if any, XFS_NULL otherwise) ends struct xfs_dinode3_core xfs_dinode_core di_crc dd ? ; CRC of the inode di_changecount DQ ? ; number of attribute changes di_lsn DQ ? ; flush sequence di_flags2 DQ ? ; more random flags di_cowextsize dd ? ; basic cow extent size for file di_pad2 rb 12 ; more padding for future expansion ; fields only written to during inode creation di_crtime DQ ; time created di_ino DQ ? ; inode number di_uuid rb 16 ; UUID of the filesystem ends struct xfs_dir2_sf_hdr count db ? i8count db ? parent DQ ? ; parent inode number, 4 or 8 bytes ends struct xfs_dir2_sf_entry namelen db ? ; actual name length (ASCII) offset rb 2 ; saved offset name db ? ; name, variable size inumber DQ ? ; 4 or 8 bytes ends struct xfs_dir2_sf hdr xfs_dir2_sf_hdr entries xfs_dir2_sf_entry ends ; active entry in a data block ; aligned to 8 bytes ; tag appears as the last 2 bytes struct xfs_dir2_data_entry inumber DQ ? namelen db ? name db ? ; name bytes array without terminator ; tag dw ? ; starting offset of the entry ends ; unused entry in a data block struct xfs_dir2_data_unused freetag dw ? ; XFS_DIR2_DATA_FREE_TAG aka XFS_NULL length dw ? ; total free length ; tag dw ? ; starting offset of the entry ends ; generic data entry struct xfs_dir2_data_union union xentry xfs_dir2_data_entry unused xfs_dir2_data_unused ends ends ; describe a free area in the data block ; the freespace will be formatted as a xfs_dir2_data_unused_t struct xfs_dir2_data_free offset dw ? ; start of freespace length dw ? ; length of freespace ends ; header for the data blocks ; always at the beginning of a directory-sized block ; the code knows that XFS_DIR2_DATA_FD_COUNT is 3 struct xfs_dir2_data_hdr magic dd ? ; XFS_DIR2_DATA_MAGIC or XFS_DIR2_BLOCK_MAGIC bestfree xfs_dir2_data_free bestfree2 xfs_dir2_data_free bestfree3 xfs_dir2_data_free ends struct xfs_dir3_data_hdr xfs_dir2_data_hdr magic3 dd ? crc dd ? blkno DQ ? lsn DQ ? uuid rb 16 owner DQ ? ends ; leaf block entry struct xfs_dir2_leaf_entry hashval dd ? ; hash value of name address dd ? ; address of data entry ends ; the tail of directory block struct xfs_dir2_block_tail count dd ? ; count of leaf entries stale dd ? ; count of stale leaf entries ends ; generic single-block structure, for xfs_db struct xfs_dir2_block hdr xfs_dir2_data_hdr ; magic XFS_DIR2_DATA_MAGIC u xfs_dir2_data_union ; leaf xfs_dir2_leaf_entry ; tail xfs_dir2_block_tail ends struct xfs_da_blkinfo forw dd ? ; previous block in list back dd ? ; following block in list magic dw ? ; validity check on block pad dw ? ; unused ends struct xfs_dir2_leaf_hdr info xfs_da_blkinfo count dw ? stale dw ? ends struct xfs_da3_blkinfo xfs_da_blkinfo crc dd ? ; CRC of block blkno DQ ? ; first block of the buffer lsn DQ ? ; sequence number of last write uuid rb 16 ; filesystem we belong to owner DQ ? ; inode that owns the block ends struct xfs_dir3_leaf_hdr info xfs_da3_blkinfo count dw ? stale dw ? pad dd ? ends ; bests and tail are at the end of the block for single-leaf only ; (magic = XFS_DIR2_LEAF1_MAGIC not XFS_DIR2_LEAFN_MAGIC) struct xfs_dir2_leaf hdr xfs_dir2_leaf_hdr ents xfs_dir2_leaf_entry ; bests dw ? ; tail xfs_dir2_leaf_tail ends struct xfs_dir3_leaf hdr xfs_dir3_leaf_hdr ents xfs_dir2_leaf_entry ; bests ; tail ends struct xfs_dir2_free_hdr magic dd ? ; XFS_DIR2_FREE_MAGIC firstdb dd ? ; db of first entry nvalid dd ? ; count of valid entries nused dd ? ; count of used entries ends struct xfs_da_node_hdr info xfs_da_blkinfo count dw ? level dw ? ends struct xfs_da_node_entry hashval dd ? ; hash value for this descendant before dd ? ; Btree block before this key ends struct xfs_da_intnode hdr xfs_da_node_hdr btree xfs_da_node_entry ends struct xfs_da3_node_hdr info xfs_da3_blkinfo count dw ? level dw ? pad dd ? ends struct xfs_da3_intnode hdr xfs_da3_node_hdr btree xfs_da_node_entry ends ; packet extent struct xfs_bmbt_rec l0 DQ ? l1 DQ ? ends ; unpacked extent struct xfs_bmbt_irec br_startoff DQ ? br_startblock DQ ? br_blockcount dd ? br_state dd ? ends struct xfs_dir2_bmx bmx xfs_bmbt_rec ends ; bmap root header struct xfs_bmdr_block bb_level dw ? ; 0 is a leaf bb_numrecs dw ? ; current number of data records ends ; key structure for non-leaf levels of the tree struct xfs_bmbt_key br_startoff DQ ? ; starting file offset ends struct xfs_bmdr_ptr DQ ends struct xfs_bmbt_ptr DQ ends ; long form header: bmap btrees ; xfs_btree_lblock is xfs_bmbt_block (xfs_btree.h) struct xfs_bmbt_block bb_magic dd ? ; magic number for block type bb_level dw ? ; 0 is a leaf bb_numrecs dw ? ; current number of data records bb_leftsib DQ ? ; left sibling block or NULLDFSBNO bb_rightsib DQ ? ; right sibling block or NULLDFSBNO ends struct xfs_bmbt3_block xfs_bmbt_block bb_blkno DQ ? bb_lsn DQ ? bb_uuid rb 16 bb_owner DQ ? bb_crc dd ? bb_pad dd ? ends struct xfs_inode di_core xfs_dinode_core ; main info, aka core union di_u db ? ; data fork inode part dir2_sf xfs_dir2_sf bmx xfs_dir2_bmx ends ; di_a db ? ; data attribute ends struct xfs_agf agf_magicnum dd ? ; magic number == XFS_AGF_MAGIC agf_versionnum dd ? ; header version == XFS_AGF_VERSION agf_seqno dd ? ; sequence # starting from 0 agf_length dd ? ; size in blocks of AG agf_roots dd ? agf_levels dd ? agf_flfirst dd ? agf_fllast dd ? agf_flcount dd ? agf_freeblks dd ? ; free blocks in AG ends ; internal data for every XFS partition ; this _is_ XFS partition structure ; most fields are unpacked or bswap'ed values of the superblock, see xfs_sb structure above struct XFS PARTITION Lock MUTEX ? ; access mutex sectsize dd ? blocksize dd ? dirblocksize dd ? inodesize dd ? rootino DQ ? versionnum dd ? version dd ? features2 dd ? inopblock dd ? blkpdirblk dd ? blocklog dd ? sectlog dd ? inodelog dd ? inopblog dd ? agblklog dd ? sectpblog dd ? dirblklog dd ? ; in fsblocks sectpblock dd ? agblocks dd ? dir2_leaf_offset_blocks DQ ? dir2_free_offset_blocks DQ ? agblockmask DQ ? inode_core_size dd ? features_incompat dd ? ftype_size dd ? dir_block_magic dd ? dir_data_magic dd ? dir_leaf1_magic dw ? dir_leafn_magic dw ? da_node_magic dw ? bmap_magic dd ? bmbt_block_size dd ? dir_block_size dd ? dir_data_size dd ? dir_leaf1_size dd ? dir_leafn_size dd ? da_node_size dd ? da_blkinfo_size dd ? conv_time_to_kos_epoch dd ? ; helpers, temporary vars, etc ; should go to file descriptor and local vars? cur_block dd ? cur_block_data dd ? cur_inode dd ? cur_sect dd ? cur_dirblock dd ? tmp_inode dd ? extent xfs_bmbt_irec bytes_to_read dd ? bytes_read dd ? bytes_left_in_file DQ ? file_offset DQ ? file_buffer dd ? entries_read dd ? requested_cnt dd ? dir_sf_self_done dd ? dir_sf_parent_done dd ? entries_left_in_dir dd ? entries_to_skip dd ? max_dirblockaddr dd ? cur_inode_save dd ? shortform_inodelen dd ? bdfe_nameenc dd ? bdfe_len dd ? bdfe_process dd ? inode_self DQ ? bdfe_buf dd ? eof dd ? offset_begin DQ ? offset_end DQ ? ends struct f70s0arg sf dd ? offset DQ ? count dd ? buf dd ? zero db ? path dd ? ends struct f70s1arg sf dd ? start_idx dd ? encoding dd ? count dd ? buf dd ? zero db ? path dd ? ends struct f70s5arg sf dd ? dd ? xflags dd ? ; name flags is already used dd ? buf dd ? zero db ? path dd ? ends struct bdfe_hdr version dd ? read_cnt dd ? total_cnt dd ? zeroed rd 5 ends struct bdfe attr dd ? nameenc dd ? ctime dd ? cdate dd ? atime dd ? adate dd ? mtime dd ? mdate dd ? size DQ ? name db ? ends