/* xfs.h - an extraction from xfsprogs-1.3.5/include/xfs* into one file */ /* * GRUB -- GRand Unified Bootloader * Copyright (C) 2000 Silicon Graphics, Inc. All Rights Reserved. * Copyright (C) 2001,2004 Free Software Foundation, Inc. * * This program is free software; you can redistribute it and/or modify it * under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it would be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * * Further, this software is distributed without any warranty that it is * free of the rightful claim of any third person regarding infringement * or the like. Any license provided herein, whether implied or * otherwise, applies only to this software file. Patent licenses, if * any, provided herein do not apply to combinations of this program with * other software, or any other product whatsoever. * * You should have received a copy of the GNU General Public License along * with this program; if not, write the Free Software Foundation, Inc., 59 * Temple Place - Suite 330, Boston MA 02111-1307, USA. * * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, * Mountain View, CA 94043, or: * * http://www.sgi.com * * For further information regarding this notice, see: * * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ */ typedef signed char xfs_int8_t; typedef unsigned char xfs_uint8_t; typedef short xfs_int16_t; typedef unsigned short xfs_uint16_t; typedef int xfs_int32_t; typedef unsigned int xfs_uint32_t; typedef long long xfs_int64_t; typedef unsigned long long xfs_uint64_t; typedef xfs_uint64_t xfs_ino_t; typedef xfs_uint32_t xfs_agino_t; typedef xfs_int64_t xfs_daddr_t; typedef xfs_int64_t xfs_off_t; typedef xfs_uint8_t uuid_t[16]; /* those are from xfs_types.h */ typedef xfs_uint32_t xfs_agblock_t; /* blockno in alloc. group */ typedef xfs_uint32_t xfs_extlen_t; /* extent length in blocks */ typedef xfs_uint32_t xfs_agnumber_t; /* allocation group number */ typedef xfs_int32_t xfs_extnum_t; /* # of extents in a file */ typedef xfs_int16_t xfs_aextnum_t; /* # extents in an attribute fork */ typedef xfs_int64_t xfs_fsize_t; /* bytes in a file */ typedef xfs_uint32_t xfs_dablk_t; /* dir/attr block number (in file) */ typedef xfs_uint32_t xfs_dahash_t; /* dir/attr hash value */ /* * Disk based types: */ typedef xfs_uint64_t xfs_dfsbno_t; /* blockno in filesystem (agno|agbno) */ typedef xfs_uint64_t xfs_drfsbno_t; /* blockno in filesystem (raw) */ typedef xfs_uint64_t xfs_drtbno_t; /* extent (block) in realtime area */ typedef xfs_uint64_t xfs_dfiloff_t; /* block number in a file */ typedef xfs_uint64_t xfs_fsblock_t; /* blockno in filesystem (agno|agbno) */ typedef xfs_uint64_t xfs_fileoff_t; /* block number in a file */ typedef xfs_uint64_t xfs_filblks_t; /* number of blocks in a file */ /* those are from xfs_sb.h */ #define XFS_SB_MAGIC 0x58465342 /* 'XFSB'*/ #define XFS_SB_VERSION_4 4 /* 6.2+ - bitmask version */ #define XFS_SB_VERSION_NUMBITS 0x000f typedef struct xfs_sb { xfs_uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */ xfs_uint32_t sb_blocksize; /* logical block size, bytes */ xfs_drfsbno_t sb_dblocks; /* number of data blocks */ xfs_drfsbno_t sb_rblocks; /* number of realtime blocks */ xfs_drtbno_t sb_rextents; /* number of realtime extents */ uuid_t sb_uuid; /* file system unique id */ xfs_dfsbno_t sb_logstart; /* starting block of log if internal */ xfs_ino_t sb_rootino; /* root inode number */ xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */ xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */ xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */ xfs_agblock_t sb_agblocks; /* size of an allocation group */ xfs_agnumber_t sb_agcount; /* number of allocation groups */ xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */ xfs_extlen_t sb_logblocks; /* number of log blocks */ xfs_uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */ xfs_uint16_t sb_sectsize; /* volume sector size, bytes */ xfs_uint16_t sb_inodesize; /* inode size, bytes */ xfs_uint16_t sb_inopblock; /* inodes per block */ char sb_fname[12]; /* file system name */ xfs_uint8_t sb_blocklog; /* log2 of sb_blocksize */ xfs_uint8_t sb_sectlog; /* log2 of sb_sectsize */ xfs_uint8_t sb_inodelog; /* log2 of sb_inodesize */ xfs_uint8_t sb_inopblog; /* log2 of sb_inopblock */ xfs_uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */ xfs_uint8_t sb_rextslog; /* log2 of sb_rextents */ xfs_uint8_t sb_inprogress; /* mkfs is in progress, don't mount */ xfs_uint8_t sb_imax_pct; /* max % of fs for inode space */ /* statistics */ /* * These fields must remain contiguous. If you really * want to change their layout, make sure you fix the * code in xfs_trans_apply_sb_deltas(). */ xfs_uint64_t sb_icount; /* allocated inodes */ xfs_uint64_t sb_ifree; /* free inodes */ xfs_uint64_t sb_fdblocks; /* free data blocks */ xfs_uint64_t sb_frextents; /* free realtime extents */ /* * End contiguous fields. */ xfs_ino_t sb_uquotino; /* user quota inode */ xfs_ino_t sb_gquotino; /* group quota inode */ xfs_uint16_t sb_qflags; /* quota flags */ xfs_uint8_t sb_flags; /* misc. flags */ xfs_uint8_t sb_shared_vn; /* shared version number */ xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */ xfs_uint32_t sb_unit; /* stripe or raid unit */ xfs_uint32_t sb_width; /* stripe or raid width */ xfs_uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */ xfs_uint8_t sb_dummy[7]; /* padding */ } xfs_sb_t; /* those are from xfs_btree.h */ /* * Long form header: bmap btrees. */ typedef struct xfs_btree_lblock { xfs_uint32_t bb_magic; /* magic number for block type */ xfs_uint16_t bb_level; /* 0 is a leaf */ xfs_uint16_t bb_numrecs; /* current # of data records */ xfs_dfsbno_t bb_leftsib; /* left sibling block or NULLDFSBNO */ xfs_dfsbno_t bb_rightsib; /* right sibling block or NULLDFSBNO */ } xfs_btree_lblock_t; /* * Combined header and structure, used by common code. */ typedef struct xfs_btree_hdr { xfs_uint32_t bb_magic; /* magic number for block type */ xfs_uint16_t bb_level; /* 0 is a leaf */ xfs_uint16_t bb_numrecs; /* current # of data records */ } xfs_btree_hdr_t; typedef struct xfs_btree_block { xfs_btree_hdr_t bb_h; /* header */ union { struct { xfs_agblock_t bb_leftsib; xfs_agblock_t bb_rightsib; } s; /* short form pointers */ struct { xfs_dfsbno_t bb_leftsib; xfs_dfsbno_t bb_rightsib; } l; /* long form pointers */ } bb_u; /* rest */ } xfs_btree_block_t; /* those are from xfs_bmap_btree.h */ /* * Bmap root header, on-disk form only. */ typedef struct xfs_bmdr_block { xfs_uint16_t bb_level; /* 0 is a leaf */ xfs_uint16_t bb_numrecs; /* current # of data records */ } xfs_bmdr_block_t; /* * Bmap btree record and extent descriptor. * For 32-bit kernels, * l0:31 is an extent flag (value 1 indicates non-normal). * l0:0-30 and l1:9-31 are startoff. * l1:0-8, l2:0-31, and l3:21-31 are startblock. * l3:0-20 are blockcount. * For 64-bit kernels, * l0:63 is an extent flag (value 1 indicates non-normal). * l0:9-62 are startoff. * l0:0-8 and l1:21-63 are startblock. * l1:0-20 are blockcount. */ #define BMBT_USE_64 1 typedef struct xfs_bmbt_rec_32 { xfs_uint32_t l0, l1, l2, l3; } xfs_bmbt_rec_32_t; typedef struct xfs_bmbt_rec_64 { xfs_uint64_t l0, l1; } xfs_bmbt_rec_64_t; #if BMBT_USE_64 typedef xfs_uint64_t xfs_bmbt_rec_base_t; /* use this for casts */ typedef xfs_bmbt_rec_64_t xfs_bmbt_rec_t, xfs_bmdr_rec_t; #else /* !BMBT_USE_64 */ typedef xfs_uint32_t xfs_bmbt_rec_base_t; /* use this for casts */ typedef xfs_bmbt_rec_32_t xfs_bmbt_rec_t, xfs_bmdr_rec_t; #endif /* BMBT_USE_64 */ /* * Key structure for non-leaf levels of the tree. */ typedef struct xfs_bmbt_key { xfs_dfiloff_t br_startoff; /* starting file offset */ } xfs_bmbt_key_t, xfs_bmdr_key_t; typedef xfs_dfsbno_t xfs_bmbt_ptr_t, xfs_bmdr_ptr_t; /* btree pointer type */ /* btree block header type */ typedef struct xfs_btree_lblock xfs_bmbt_block_t; /* those are from xfs_dir2.h */ /* * Directory version 2. * There are 4 possible formats: * shortform * single block - data with embedded leaf at the end * multiple data blocks, single leaf+freeindex block * data blocks, node&leaf blocks (btree), freeindex blocks * * The shortform format is in xfs_dir2_sf.h. * The single block format is in xfs_dir2_block.h. * The data block format is in xfs_dir2_data.h. * The leaf and freeindex block formats are in xfs_dir2_leaf.h. * Node blocks are the same as the other version, in xfs_da_btree.h. */ /* * Byte offset in data block and shortform entry. */ typedef xfs_uint16_t xfs_dir2_data_off_t; /* * Byte offset in a directory. */ typedef xfs_off_t xfs_dir2_off_t; /* those are from xfs_da_btree.h */ /*======================================================================== * Directory Structure when greater than XFS_LBSIZE(mp) bytes. *========================================================================*/ /* * This structure is common to both leaf nodes and non-leaf nodes in the Btree. * * Is is used to manage a doubly linked list of all blocks at the same * level in the Btree, and to identify which type of block this is. */ #define XFS_DIR2_LEAF1_MAGIC 0xd2f1 /* magic number: v2 dirlf single blks */ #define XFS_DIR2_LEAFN_MAGIC 0xd2ff /* magic number: v2 dirlf multi blks */ typedef struct xfs_da_blkinfo { xfs_dablk_t forw; /* previous block in list */ xfs_dablk_t back; /* following block in list */ xfs_uint16_t magic; /* validity check on block */ xfs_uint16_t pad; /* unused */ } xfs_da_blkinfo_t; /* * This is the structure of the root and intermediate nodes in the Btree. * The leaf nodes are defined above. * * Entries are not packed. * * Since we have duplicate keys, use a binary search but always follow * all match in the block, not just the first match found. */ typedef struct xfs_da_intnode { struct xfs_da_node_hdr { /* constant-structure header block */ xfs_da_blkinfo_t info; /* block type, links, etc. */ xfs_uint16_t count; /* count of active entries */ xfs_uint16_t level; /* level above leaves (leaf == 0) */ } hdr; struct xfs_da_node_entry { xfs_dahash_t hashval; /* hash value for this descendant */ xfs_dablk_t before; /* Btree block before this key */ } btree[1]; /* variable sized array of keys */ } xfs_da_intnode_t; /* those are from xfs_dir2_data.h */ /* * Directory format 2, data block structures. */ /* * Constants. */ #define XFS_DIR2_DATA_FREE_TAG 0xffff #define XFS_DIR2_DATA_FD_COUNT 3 /* * Structures. */ /* * Describe a free area in the data block. * The freespace will be formatted as a xfs_dir2_data_unused_t. */ typedef struct xfs_dir2_data_free { xfs_dir2_data_off_t offset; /* start of freespace */ xfs_dir2_data_off_t length; /* length of freespace */ } xfs_dir2_data_free_t; /* * 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. */ typedef struct xfs_dir2_data_hdr { xfs_uint32_t magic; /* XFS_DIR2_DATA_MAGIC */ /* or XFS_DIR2_BLOCK_MAGIC */ xfs_dir2_data_free_t bestfree[XFS_DIR2_DATA_FD_COUNT]; } xfs_dir2_data_hdr_t; /* * Active entry in a data block. Aligned to 8 bytes. * Tag appears as the last 2 bytes. */ typedef struct xfs_dir2_data_entry { xfs_ino_t inumber; /* inode number */ xfs_uint8_t namelen; /* name length */ xfs_uint8_t name[1]; /* name bytes, no null */ /* variable offset */ xfs_dir2_data_off_t tag; /* starting offset of us */ } xfs_dir2_data_entry_t; /* * Unused entry in a data block. Aligned to 8 bytes. * Tag appears as the last 2 bytes. */ typedef struct xfs_dir2_data_unused { xfs_uint16_t freetag; /* XFS_DIR2_DATA_FREE_TAG */ xfs_dir2_data_off_t length; /* total free length */ /* variable offset */ xfs_dir2_data_off_t tag; /* starting offset of us */ } xfs_dir2_data_unused_t; typedef union { xfs_dir2_data_entry_t entry; xfs_dir2_data_unused_t unused; } xfs_dir2_data_union_t; /* those are from xfs_dir2_leaf.h */ /* * Directory version 2, leaf block structures. */ /* * Leaf block header. */ typedef struct xfs_dir2_leaf_hdr { xfs_da_blkinfo_t info; /* header for da routines */ xfs_uint16_t count; /* count of entries */ xfs_uint16_t stale; /* count of stale entries */ } xfs_dir2_leaf_hdr_t; /* those are from xfs_dir2_block.h */ /* * xfs_dir2_block.h * Directory version 2, single block format structures */ /* * The single block format is as follows: * xfs_dir2_data_hdr_t structure * xfs_dir2_data_entry_t and xfs_dir2_data_unused_t structures * xfs_dir2_leaf_entry_t structures * xfs_dir2_block_tail_t structure */ #define XFS_DIR2_BLOCK_MAGIC 0x58443242 /* XD2B: for one block dirs */ typedef struct xfs_dir2_block_tail { xfs_uint32_t count; /* count of leaf entries */ xfs_uint32_t stale; /* count of stale lf entries */ } xfs_dir2_block_tail_t; /* those are from xfs_dir2_sf.h */ /* * Directory layout when stored internal to an inode. * * Small directories are packed as tightly as possible so as to * fit into the literal area of the inode. */ /* * Inode number stored as 8 8-bit values. */ typedef struct { xfs_uint8_t i[8]; } xfs_dir2_ino8_t; /* * Inode number stored as 4 8-bit values. * Works a lot of the time, when all the inode numbers in a directory * fit in 32 bits. */ typedef struct { xfs_uint8_t i[4]; } xfs_dir2_ino4_t; typedef union { xfs_dir2_ino8_t i8; xfs_dir2_ino4_t i4; } xfs_dir2_inou_t; /* * Normalized offset (in a data block) of the entry, really xfs_dir2_data_off_t. * Only need 16 bits, this is the byte offset into the single block form. */ typedef struct { xfs_uint8_t i[2]; } xfs_dir2_sf_off_t; /* * The parent directory has a dedicated field, and the self-pointer must * be calculated on the fly. * * Entries are packed toward the top as tightly as possible. The header * and the elements must be bcopy()'d out into a work area to get correct * alignment for the inode number fields. */ typedef struct xfs_dir2_sf_hdr { xfs_uint8_t count; /* count of entries */ xfs_uint8_t i8count; /* count of 8-byte inode #s */ xfs_dir2_inou_t parent; /* parent dir inode number */ } xfs_dir2_sf_hdr_t; typedef struct xfs_dir2_sf_entry { xfs_uint8_t namelen; /* actual name length */ xfs_dir2_sf_off_t offset; /* saved offset */ xfs_uint8_t name[1]; /* name, variable size */ xfs_dir2_inou_t inumber; /* inode number, var. offset */ } xfs_dir2_sf_entry_t; typedef struct xfs_dir2_sf { xfs_dir2_sf_hdr_t hdr; /* shortform header */ xfs_dir2_sf_entry_t list[1]; /* shortform entries */ } xfs_dir2_sf_t; /* those are from xfs_dinode.h */ #define XFS_DINODE_VERSION_1 1 #define XFS_DINODE_VERSION_2 2 #define XFS_DINODE_MAGIC 0x494e /* 'IN' */ /* * Disk inode structure. * This is just the header; the inode is expanded to fill a variable size * with the last field expanding. It is split into the core and "other" * because we only need the core part in the in-core inode. */ typedef struct xfs_timestamp { xfs_int32_t t_sec; /* timestamp seconds */ xfs_int32_t t_nsec; /* timestamp nanoseconds */ } xfs_timestamp_t; /* * Note: Coordinate changes to this structure with the XFS_DI_* #defines * below and the offsets table in xfs_ialloc_log_di(). */ typedef struct xfs_dinode_core { xfs_uint16_t di_magic; /* inode magic # = XFS_DINODE_MAGIC */ xfs_uint16_t di_mode; /* mode and type of file */ xfs_int8_t di_version; /* inode version */ xfs_int8_t di_format; /* format of di_c data */ xfs_uint16_t di_onlink; /* old number of links to file */ xfs_uint32_t di_uid; /* owner's user id */ xfs_uint32_t di_gid; /* owner's group id */ xfs_uint32_t di_nlink; /* number of links to file */ xfs_uint16_t di_projid; /* owner's project id */ xfs_uint8_t di_pad[10]; /* unused, zeroed space */ xfs_timestamp_t di_atime; /* time last accessed */ xfs_timestamp_t di_mtime; /* time last modified */ xfs_timestamp_t di_ctime; /* time created/inode modified */ xfs_fsize_t di_size; /* number of bytes in file */ xfs_drfsbno_t di_nblocks; /* # of direct & btree blocks used */ xfs_extlen_t di_extsize; /* basic/minimum extent size for file */ xfs_extnum_t di_nextents; /* number of extents in data fork */ xfs_aextnum_t di_anextents; /* number of extents in attribute fork*/ xfs_uint8_t di_forkoff; /* attr fork offs, <<3 for 64b align */ xfs_int8_t di_aformat; /* format of attr fork's data */ xfs_uint32_t di_dmevmask; /* DMIG event mask */ xfs_uint16_t di_dmstate; /* DMIG state info */ xfs_uint16_t di_flags; /* random flags, XFS_DIFLAG_... */ xfs_uint32_t di_gen; /* generation number */ } xfs_dinode_core_t; typedef struct xfs_dinode { xfs_dinode_core_t di_core; xfs_agino_t di_next_unlinked;/* agi unlinked list ptr */ union { xfs_bmdr_block_t di_bmbt; /* btree root block */ xfs_bmbt_rec_32_t di_bmx[1]; /* extent list */ xfs_dir2_sf_t di_dir2sf; /* shortform directory v2 */ char di_c[1]; /* local contents */ } di_u; } xfs_dinode_t; /* * Values for di_format */ typedef enum xfs_dinode_fmt { XFS_DINODE_FMT_DEV, /* CHR, BLK: di_dev */ XFS_DINODE_FMT_LOCAL, /* DIR, REG: di_c */ /* LNK: di_symlink */ XFS_DINODE_FMT_EXTENTS, /* DIR, REG, LNK: di_bmx */ XFS_DINODE_FMT_BTREE, /* DIR, REG, LNK: di_bmbt */ XFS_DINODE_FMT_UUID /* MNT: di_uuid */ } xfs_dinode_fmt_t; /* * File types (mode field) */ #define IFMT 0170000 /* type of file */ #define IFDIR 0040000 /* directory */ #define IFREG 0100000 /* regular */ #define IFLNK 0120000 /* symbolic link */
