forked from KolibriOS/kolibrios
623 lines
22 KiB
PHP
623 lines
22 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2013-2020. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision$
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; file types from stat.h
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S_IFMT = 0170000o ; These bits determine file type
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S_IFDIR = 0040000o ; Directory
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S_IFCHR = 0020000o ; Character device
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S_IFBLK = 0060000o ; Block device
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S_IFREG = 0100000o ; Regular file
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S_IFIFO = 0010000o ; FIFO
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S_IFLNK = 0120000o ; Symbolic link
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S_IFSOCK = 0140000o ; Socket
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; XFS null constant: empty fields must be all ones, not zeros!
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XFS_NULL = -1
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XFS_SECT_SB = 0
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; signatures of file system structures
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XFS_AGF_MAGIC = 'XAGF'
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XFS_DINODE_MAGIC = 'IN'
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XFS_BMAP_MAGIC = 'BMAP'
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XFS_DA_NODE_MAGIC = 0xbefe
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XFS_DIR2_LEAF1_MAGIC = 0xf1d2
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XFS_DIR2_LEAFN_MAGIC = 0xffd2
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XFS_DIR2_BLOCK_MAGIC = 'XD2B'
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XFS_DIR2_DATA_MAGIC = 'XD2D'
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XFS_BMAP3_MAGIC = 'BMA3'
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XFS_DA3_NODE_MAGIC = 0xbe3e ; non-leaf blocks
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XFS_DIR3_LEAF1_MAGIC = 0xf13d ; v3 dir single blks
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XFS_DIR3_LEAFN_MAGIC = 0xff3d ; v3 dir multi blks
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XFS_DIR3_BLOCK_MAGIC = 'XDB3' ; single block dirs
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XFS_DIR3_DATA_MAGIC = 'XDD3' ; multiblock dirs
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XFS_SB_MAGIC = 'XFSB'
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XFS_SB_VERSION_NUMBITS = 0x000f
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XFS_SB_VERSION_ALLFBITS = 0xfff0
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XFS_SB_VERSION_REALFBITS = 0x0ff0
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XFS_SB_VERSION_ATTRBIT = 0x0010
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XFS_SB_VERSION_NLINKBIT = 0x0020
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XFS_SB_VERSION_QUOTABIT = 0x0040
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XFS_SB_VERSION_ALIGNBIT = 0x0080
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XFS_SB_VERSION_DALIGNBIT = 0x0100
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XFS_SB_VERSION_SHAREDBIT = 0x0200
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XFS_SB_VERSION_LOGV2BIT = 0x0400
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XFS_SB_VERSION_SECTORBIT = 0x0800
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XFS_SB_VERSION_EXTFLGBIT = 0x1000
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XFS_SB_VERSION_DIRV2BIT = 0x2000
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XFS_SB_VERSION_BORGBIT = 0x4000 ; ASCII only case-insensitive
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XFS_SB_VERSION_MOREBITSBIT = 0x8000
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XFS_SB_VERSION_SUPPORTED = XFS_SB_VERSION_NUMBITS OR \
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XFS_SB_VERSION_ATTRBIT OR \
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XFS_SB_VERSION_NLINKBIT OR \
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XFS_SB_VERSION_QUOTABIT OR \
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XFS_SB_VERSION_ALIGNBIT OR \
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XFS_SB_VERSION_LOGV2BIT OR \
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XFS_SB_VERSION_SECTORBIT OR \
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XFS_SB_VERSION_EXTFLGBIT OR \
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XFS_SB_VERSION_DIRV2BIT OR \
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XFS_SB_VERSION_MOREBITSBIT
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XFS_SB_VERSION2_RESERVED1BIT = 0x00000001
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XFS_SB_VERSION2_LAZYSBCOUNTBIT = 0x00000002 ; Superblk counters
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XFS_SB_VERSION2_RESERVED4BIT = 0x00000004
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XFS_SB_VERSION2_ATTR2BIT = 0x00000008 ; Inline attr rework
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XFS_SB_VERSION2_PARENTBIT = 0x00000010 ; parent pointers in xattr
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XFS_SB_VERSION2_PROJID32BIT = 0x00000080 ; 32 bit project id
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XFS_SB_VERSION2_CRCBIT = 0x00000100 ; metadata CRCs
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XFS_SB_VERSION2_FTYPE = 0x00000200 ; inode type in dir
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XFS_SB_VERSION2_SUPPORTED = XFS_SB_VERSION2_LAZYSBCOUNTBIT OR \
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XFS_SB_VERSION2_ATTR2BIT OR \
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XFS_SB_VERSION2_PARENTBIT OR \
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XFS_SB_VERSION2_PROJID32BIT OR \
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XFS_SB_VERSION2_CRCBIT OR \
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XFS_SB_VERSION2_FTYPE
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XFS_SB_FEAT_INCOMPAT_FTYPE = 1 ; filetype in dirent
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XFS_SB_FEAT_INCOMPAT_SPINODES = 2 ; sparse inode chunks
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XFS_SB_FEAT_INCOMPAT_META_UUID = 4 ; metadata UUID
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XFS_SB_FEAT_INCOMPAT_SUPPORTED = XFS_SB_FEAT_INCOMPAT_FTYPE OR \
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XFS_SB_FEAT_INCOMPAT_SPINODES OR \
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XFS_SB_FEAT_INCOMPAT_META_UUID
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; bitfield lengths for packed extent
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; MSB to LSB / left to right
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BMBT_EXNTFLAG_BITLEN = 1
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BMBT_STARTOFF_BITLEN = 54
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BMBT_STARTBLOCK_BITLEN = 52
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BMBT_BLOCKCOUNT_BITLEN = 21
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XFS_DIR2_DATA_ALIGN_LOG = 3
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XFS_DIR2_DATA_ALIGN = 1 SHL XFS_DIR2_DATA_ALIGN_LOG
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XFS_DIR2_SPACE_SIZE = (1 SHL (32 + XFS_DIR2_DATA_ALIGN_LOG))
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XFS_DIR2_DATA_OFFSET = 0*XFS_DIR2_SPACE_SIZE
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XFS_DIR2_LEAF_OFFSET = 1*XFS_DIR2_SPACE_SIZE
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XFS_DIR2_FREE_OFFSET = 2*XFS_DIR2_SPACE_SIZE
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; data section magic constants for directories (xfs_dir2_data.h)
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XFS_DIR2_DATA_FD_COUNT = 3
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; valid inode formats
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; enum xfs_dinode_fmt (xfs_dinode.h)
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XFS_DINODE_FMT_DEV = 0
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XFS_DINODE_FMT_LOCAL = 1
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XFS_DINODE_FMT_EXTENTS = 2
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XFS_DINODE_FMT_BTREE = 3
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XFS_DINODE_FMT_UUID = 4
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; size of the unlinked inode hash table in the agi
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XFS_AGI_UNLINKED_BUCKETS = 64
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; possible extent states
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; enum xfs_exntst_t (xfs_bmap_btree.h)
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XFS_EXT_NORM = 0
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XFS_EXT_UNWRITTEN = 1
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XFS_EXT_DMAPI_OFFLINE = 2
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XFS_EXT_INVALID = 3
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; values for inode core flags / di_flags (xfs_dinode.h)
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XFS_DIFLAG_REALTIME_BIT = 0 ; file's blocks come from rt area
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XFS_DIFLAG_PREALLOC_BIT = 1 ; file space has been preallocated
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XFS_DIFLAG_NEWRTBM_BIT = 2 ; for rtbitmap inode, new format
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XFS_DIFLAG_NODUMP_BIT = 7 ; do not dump
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XFS_DIFLAG_REALTIME = (1 SHL XFS_DIFLAG_REALTIME_BIT)
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XFS_DIFLAG_PREALLOC = (1 SHL XFS_DIFLAG_PREALLOC_BIT)
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XFS_DIFLAG_NEWRTBM = (1 SHL XFS_DIFLAG_NEWRTBM_BIT)
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XFS_DIFLAG_NODUMP = (1 SHL XFS_DIFLAG_NODUMP_BIT)
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; superblock _ondisk_ structure (xfs_sb.h)
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; this is _not_ the partition structure
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; for XFS partition structure see XFS below
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struct xfs_sb
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sb_magicnum dd ? ; signature, must be XFS_SB_MAGIC
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sb_blocksize dd ? ; block is the minimal file system unit, in bytes
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sb_dblocks DQ ? ; number of data blocks
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sb_rblocks DQ ? ; number of realtime blocks
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sb_rextents DQ ? ; number of realtime extents
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sb_uuid rb 16 ; file system unique identifier
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sb_logstart DQ ? ; starting block of log (for internal journal)
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sb_rootino DQ ? ; root inode number
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sb_rbmino DQ ? ; bitmap inode for realtime extents
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sb_rsumino DQ ? ; summary inode for rt bitmap
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sb_rextsize dd ? ; realtime extent size, blocks
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sb_agblocks dd ? ; size of an allocation group (the last one may be smaller!)
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sb_agcount dd ? ; number of allocation groups
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sb_rbmblocks dd ? ; number of rt bitmap blocks
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sb_logblocks dd ? ; number of log blocks
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sb_versionnum dw ? ; header version
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sb_sectsize dw ? ; volume sector size in bytes
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sb_inodesize dw ? ; inode size, bytes
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sb_inopblock dw ? ; inodes per block
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sb_fname rb 12 ; inodes per block (aka label)
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sb_blocklog db ? ; log2 of sb_blocksize
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sb_sectlog db ? ; log2 of sb_blocksize
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sb_inodelog db ? ; log2 of sb_inodesize
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sb_inopblog db ? ; log2 of sb_inopblock
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sb_agblklog db ? ; log2 of sb_agblocks (rounded up!)
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sb_rextslog db ? ; log2 of sb_rextents
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sb_inprogress db ? ; mkfs is in progress, don't mount
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sb_imax_pct db ? ; max % of fs for inode space
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; statistics
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sb_icount DQ ? ; allocated inodes
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sb_ifree DQ ? ; free inodes
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sb_fdblocks DQ ? ; free data blocks
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sb_frextents DQ ? ; free realtime extents
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sb_uquotino DQ ? ; user quota inode
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sb_gquotino DQ ? ; group quota inode
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sb_qflags dw ? ; quota flags
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sb_flags db ? ; misc. flags
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sb_shared_vn db ? ; shared version number
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sb_inoalignmt dd ? ; inode chunk alignment, fsblocks
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sb_unit dd ? ; stripe or raid unit
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sb_width dd ? ; stripe or raid width
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sb_dirblklog db ? ; log2 of dir block size (fsbs)
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sb_logsectlog db ? ; log2 of the log sector size
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sb_logsectsize dw ? ; sector size for the log, bytes
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sb_logsunit dd ? ; stripe unit size for the log
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sb_features2 dd ? ; additional feature bits
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sb_bad_features2 dd ?
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sb_features_compat dd ?
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sb_features_ro_compat dd ?
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sb_features_incompat dd ?
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sb_features_log_incompat dd ?
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sb_crc dd ? ; superblock crc
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sb_spino_align dd ? ; sparse inode chunk alignment
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sb_pquotino DQ ? ; project quota inode
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sb_lsn DQ ? ; last write sequence
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sb_meta_uuid rb 16 ; metadata file system unique id
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ends
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; structure to store create, access and modification time in inode core
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struct xfs_timestamp
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t_sec dd ?
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t_nsec dd ? ; nanoseconds
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ends
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; inode core structure: basic information about file
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struct xfs_dinode_core
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di_magic dw ? ; inode magic = XFS_DINODE_MAGIC
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di_mode dw ? ; mode and type of file
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di_version db ? ; inode version
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di_format db ? ; format of di_c data
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di_onlink dw ? ; old number of links to file
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di_uid dd ? ; owner's user id
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di_gid dd ? ; owner's group id
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di_nlink dd ? ; number of links to file
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di_projid dw ? ; owner's project id
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di_pad rb 8 ; unused, zeroed space
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di_flushiter dw ? ; incremented on flush
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di_atime xfs_timestamp ; time last accessed
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di_mtime xfs_timestamp ; time last modified
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di_ctime xfs_timestamp ; time created/inode modified
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di_size DQ ? ; number of bytes in file
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di_nblocks DQ ? ; number of direct & btree blocks used
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di_extsize dd ? ; basic/minimum extent size for file
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di_nextents dd ? ; number of extents in data fork
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di_anextents dw ? ; number of extents in attribute fork
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di_forkoff db ? ; attr fork offs, <<3 for 64b align
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di_aformat db ? ; format of attr fork's data
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di_dmevmask dd ? ; DMIG event mask
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di_dmstate dw ? ; DMIG state info
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di_flags dw ? ; random flags, XFS_DIFLAG_...
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di_gen dd ? ; generation number
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di_next_unlinked dd ? ; unlinked but still used inode (if any, XFS_NULL otherwise)
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ends
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struct xfs_dinode3_core xfs_dinode_core
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di_crc dd ? ; CRC of the inode
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di_changecount DQ ? ; number of attribute changes
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di_lsn DQ ? ; flush sequence
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di_flags2 DQ ? ; more random flags
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di_cowextsize dd ? ; basic cow extent size for file
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di_pad2 rb 12 ; more padding for future expansion
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; fields only written to during inode creation
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di_crtime xfs_timestamp ; time created
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di_ino DQ ? ; inode number
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di_uuid rb 16 ; UUID of the filesystem
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ends
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struct xfs_dir2_sf_hdr
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count db ?
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i8count db ?
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parent DQ ? ; parent inode number, 4 or 8 bytes
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ends
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struct xfs_dir2_sf_entry
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namelen db ? ; actual name length (ASCII)
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offset rb 2 ; saved offset
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name db ? ; name, variable size
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inumber DQ ? ; 4 or 8 bytes
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ends
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struct xfs_dir2_sf
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hdr xfs_dir2_sf_hdr
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entries xfs_dir2_sf_entry
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ends
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; active entry in a data block
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; aligned to 8 bytes
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; tag appears as the last 2 bytes
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struct xfs_dir2_data_entry
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inumber DQ ?
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namelen db ?
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name db ? ; name bytes array without terminator
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; tag dw ? ; starting offset of the entry
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ends
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; unused entry in a data block
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struct xfs_dir2_data_unused
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freetag dw ? ; XFS_DIR2_DATA_FREE_TAG aka XFS_NULL
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length dw ? ; total free length
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; tag dw ? ; starting offset of the entry
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ends
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; generic data entry
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struct xfs_dir2_data_union
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union
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xentry xfs_dir2_data_entry
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unused xfs_dir2_data_unused
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ends
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ends
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; describe a free area in the data block
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; the freespace will be formatted as a xfs_dir2_data_unused_t
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struct xfs_dir2_data_free
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offset dw ? ; start of freespace
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length dw ? ; length of freespace
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ends
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; header for the data blocks
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; always at the beginning of a directory-sized block
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; the code knows that XFS_DIR2_DATA_FD_COUNT is 3
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struct xfs_dir2_data_hdr
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magic dd ? ; XFS_DIR2_DATA_MAGIC or XFS_DIR2_BLOCK_MAGIC
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bestfree xfs_dir2_data_free
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bestfree2 xfs_dir2_data_free
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bestfree3 xfs_dir2_data_free
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ends
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struct xfs_dir3_data_hdr xfs_dir2_data_hdr
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magic3 dd ?
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crc dd ?
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blkno DQ ?
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lsn DQ ?
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uuid rb 16
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owner DQ ?
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ends
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; leaf block entry
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struct xfs_dir2_leaf_entry
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hashval dd ? ; hash value of name
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address dd ? ; address of data entry
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ends
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; the tail of directory block
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struct xfs_dir2_block_tail
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count dd ? ; count of leaf entries
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stale dd ? ; count of stale leaf entries
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ends
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; generic single-block structure, for xfs_db
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struct xfs_dir2_block
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hdr xfs_dir2_data_hdr ; magic XFS_DIR2_DATA_MAGIC
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u xfs_dir2_data_union
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; leaf xfs_dir2_leaf_entry
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; tail xfs_dir2_block_tail
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ends
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struct xfs_da_blkinfo
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forw dd ? ; previous block in list
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back dd ? ; following block in list
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magic dw ? ; validity check on block
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pad dw ? ; unused
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ends
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struct xfs_dir2_leaf_hdr
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info xfs_da_blkinfo
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count dw ?
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stale dw ?
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ends
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struct xfs_da3_blkinfo xfs_da_blkinfo
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crc dd ? ; CRC of block
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blkno DQ ? ; first block of the buffer
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lsn DQ ? ; sequence number of last write
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uuid rb 16 ; filesystem we belong to
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owner DQ ? ; inode that owns the block
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ends
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struct xfs_dir3_leaf_hdr
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info xfs_da3_blkinfo
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count dw ?
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stale dw ?
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pad dd ?
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ends
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; bests and tail are at the end of the block for single-leaf only
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; (magic = XFS_DIR2_LEAF1_MAGIC not XFS_DIR2_LEAFN_MAGIC)
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struct xfs_dir2_leaf
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hdr xfs_dir2_leaf_hdr
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ents xfs_dir2_leaf_entry
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; bests dw ?
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; tail xfs_dir2_leaf_tail
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ends
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struct xfs_dir3_leaf
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hdr xfs_dir3_leaf_hdr
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ents xfs_dir2_leaf_entry
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; bests
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; tail
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ends
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struct xfs_dir2_free_hdr
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magic dd ? ; XFS_DIR2_FREE_MAGIC
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firstdb dd ? ; db of first entry
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nvalid dd ? ; count of valid entries
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nused dd ? ; count of used entries
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ends
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struct xfs_da_node_hdr
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info xfs_da_blkinfo
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count dw ?
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level dw ?
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ends
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struct xfs_da_node_entry
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hashval dd ? ; hash value for this descendant
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before dd ? ; Btree block before this key
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ends
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struct xfs_da_intnode
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hdr xfs_da_node_hdr
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btree xfs_da_node_entry
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ends
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struct xfs_da3_node_hdr
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info xfs_da3_blkinfo
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count dw ?
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level dw ?
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pad dd ?
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ends
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struct xfs_da3_intnode
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hdr xfs_da3_node_hdr
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btree xfs_da_node_entry
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ends
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; packet extent
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struct xfs_bmbt_rec
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l0 DQ ?
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l1 DQ ?
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ends
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; unpacked extent
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struct xfs_bmbt_irec
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br_startoff DQ ?
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br_startblock DQ ?
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br_blockcount dd ?
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br_state dd ?
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ends
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struct xfs_dir2_bmx
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bmx xfs_bmbt_rec
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ends
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; bmap root header
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struct xfs_bmdr_block
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bb_level dw ? ; 0 is a leaf
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bb_numrecs dw ? ; current number of data records
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ends
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; key structure for non-leaf levels of the tree
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struct xfs_bmbt_key
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br_startoff DQ ? ; starting file offset
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ends
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struct xfs_bmdr_ptr DQ
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ends
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struct xfs_bmbt_ptr DQ
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ends
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; long form header: bmap btrees
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; xfs_btree_lblock is xfs_bmbt_block (xfs_btree.h)
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struct xfs_bmbt_block
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bb_magic dd ? ; magic number for block type
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bb_level dw ? ; 0 is a leaf
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bb_numrecs dw ? ; current number of data records
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bb_leftsib DQ ? ; left sibling block or NULLDFSBNO
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bb_rightsib DQ ? ; right sibling block or NULLDFSBNO
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ends
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struct xfs_bmbt3_block xfs_bmbt_block
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bb_blkno DQ ?
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bb_lsn DQ ?
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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 ?
|
|
; 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 ?
|
|
; nameenc db ?
|
|
; reserved db 3 dup(?)
|
|
ctime dd ?
|
|
cdate dd ?
|
|
atime dd ?
|
|
adate dd ?
|
|
mtime dd ?
|
|
mdate dd ?
|
|
size DQ ?
|
|
name db ?
|
|
ends
|