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All of the buffer operations structures are needed to be exported for xfs_db, so move them all to a common location rather than spreading them all over the place. They are verifying the on-disk format, so while xfs_format.h might be a good place, it is not part of the on disk format. Hence we need to create a new header file that we centralise these related definitions. Start by moving the bffer operations structures, and then also move all the other definitions that have crept into xfs_log_format.h and xfs_format.h as there was no other shared header file to put them in. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ben Myers <bpm@sgi.com>
160 lines
5.2 KiB
C
160 lines
5.2 KiB
C
/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_FORMAT_H__
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#define __XFS_FORMAT_H__
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/*
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* XFS On Disk Format Definitions
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*
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* This header file defines all the on-disk format definitions for
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* general XFS objects. Directory and attribute related objects are defined in
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* xfs_da_format.h, which log and log item formats are defined in
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* xfs_log_format.h. Everything else goes here.
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*/
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struct xfs_mount;
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struct xfs_trans;
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struct xfs_inode;
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struct xfs_buf;
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struct xfs_ifork;
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/*
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* RealTime Device format definitions
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*/
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/* Min and max rt extent sizes, specified in bytes */
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#define XFS_MAX_RTEXTSIZE (1024 * 1024 * 1024) /* 1GB */
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#define XFS_DFL_RTEXTSIZE (64 * 1024) /* 64kB */
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#define XFS_MIN_RTEXTSIZE (4 * 1024) /* 4kB */
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#define XFS_BLOCKSIZE(mp) ((mp)->m_sb.sb_blocksize)
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#define XFS_BLOCKMASK(mp) ((mp)->m_blockmask)
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#define XFS_BLOCKWSIZE(mp) ((mp)->m_blockwsize)
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#define XFS_BLOCKWMASK(mp) ((mp)->m_blockwmask)
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/*
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* RT Summary and bit manipulation macros.
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*/
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#define XFS_SUMOFFS(mp,ls,bb) ((int)((ls) * (mp)->m_sb.sb_rbmblocks + (bb)))
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#define XFS_SUMOFFSTOBLOCK(mp,s) \
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(((s) * (uint)sizeof(xfs_suminfo_t)) >> (mp)->m_sb.sb_blocklog)
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#define XFS_SUMPTR(mp,bp,so) \
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((xfs_suminfo_t *)((bp)->b_addr + \
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(((so) * (uint)sizeof(xfs_suminfo_t)) & XFS_BLOCKMASK(mp))))
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#define XFS_BITTOBLOCK(mp,bi) ((bi) >> (mp)->m_blkbit_log)
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#define XFS_BLOCKTOBIT(mp,bb) ((bb) << (mp)->m_blkbit_log)
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#define XFS_BITTOWORD(mp,bi) \
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((int)(((bi) >> XFS_NBWORDLOG) & XFS_BLOCKWMASK(mp)))
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#define XFS_RTMIN(a,b) ((a) < (b) ? (a) : (b))
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#define XFS_RTMAX(a,b) ((a) > (b) ? (a) : (b))
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#define XFS_RTLOBIT(w) xfs_lowbit32(w)
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#define XFS_RTHIBIT(w) xfs_highbit32(w)
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#if XFS_BIG_BLKNOS
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#define XFS_RTBLOCKLOG(b) xfs_highbit64(b)
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#else
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#define XFS_RTBLOCKLOG(b) xfs_highbit32(b)
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#endif
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/*
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* Dquot and dquot block format definitions
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*/
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#define XFS_DQUOT_MAGIC 0x4451 /* 'DQ' */
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#define XFS_DQUOT_VERSION (u_int8_t)0x01 /* latest version number */
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/*
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* This is the main portion of the on-disk representation of quota
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* information for a user. This is the q_core of the xfs_dquot_t that
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* is kept in kernel memory. We pad this with some more expansion room
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* to construct the on disk structure.
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*/
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typedef struct xfs_disk_dquot {
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__be16 d_magic; /* dquot magic = XFS_DQUOT_MAGIC */
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__u8 d_version; /* dquot version */
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__u8 d_flags; /* XFS_DQ_USER/PROJ/GROUP */
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__be32 d_id; /* user,project,group id */
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__be64 d_blk_hardlimit;/* absolute limit on disk blks */
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__be64 d_blk_softlimit;/* preferred limit on disk blks */
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__be64 d_ino_hardlimit;/* maximum # allocated inodes */
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__be64 d_ino_softlimit;/* preferred inode limit */
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__be64 d_bcount; /* disk blocks owned by the user */
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__be64 d_icount; /* inodes owned by the user */
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__be32 d_itimer; /* zero if within inode limits if not,
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this is when we refuse service */
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__be32 d_btimer; /* similar to above; for disk blocks */
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__be16 d_iwarns; /* warnings issued wrt num inodes */
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__be16 d_bwarns; /* warnings issued wrt disk blocks */
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__be32 d_pad0; /* 64 bit align */
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__be64 d_rtb_hardlimit;/* absolute limit on realtime blks */
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__be64 d_rtb_softlimit;/* preferred limit on RT disk blks */
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__be64 d_rtbcount; /* realtime blocks owned */
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__be32 d_rtbtimer; /* similar to above; for RT disk blocks */
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__be16 d_rtbwarns; /* warnings issued wrt RT disk blocks */
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__be16 d_pad;
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} xfs_disk_dquot_t;
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/*
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* This is what goes on disk. This is separated from the xfs_disk_dquot because
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* carrying the unnecessary padding would be a waste of memory.
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*/
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typedef struct xfs_dqblk {
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xfs_disk_dquot_t dd_diskdq; /* portion that lives incore as well */
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char dd_fill[4]; /* filling for posterity */
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/*
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* These two are only present on filesystems with the CRC bits set.
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*/
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__be32 dd_crc; /* checksum */
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__be64 dd_lsn; /* last modification in log */
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uuid_t dd_uuid; /* location information */
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} xfs_dqblk_t;
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#define XFS_DQUOT_CRC_OFF offsetof(struct xfs_dqblk, dd_crc)
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/*
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* Remote symlink format and access functions.
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*/
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#define XFS_SYMLINK_MAGIC 0x58534c4d /* XSLM */
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struct xfs_dsymlink_hdr {
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__be32 sl_magic;
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__be32 sl_offset;
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__be32 sl_bytes;
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__be32 sl_crc;
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uuid_t sl_uuid;
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__be64 sl_owner;
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__be64 sl_blkno;
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__be64 sl_lsn;
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};
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/*
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* The maximum pathlen is 1024 bytes. Since the minimum file system
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* blocksize is 512 bytes, we can get a max of 3 extents back from
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* bmapi when crc headers are taken into account.
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*/
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#define XFS_SYMLINK_MAPS 3
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#define XFS_SYMLINK_BUF_SPACE(mp, bufsize) \
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((bufsize) - (xfs_sb_version_hascrc(&(mp)->m_sb) ? \
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sizeof(struct xfs_dsymlink_hdr) : 0))
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#endif /* __XFS_FORMAT_H__ */
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