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root/fs/xfs/xfs_trans_space.h

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/*
 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms 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.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_TRANS_SPACE_H__
#define __XFS_TRANS_SPACE_H__

/*
 * Components of space reservations.
 */
#define XFS_MAX_CONTIG_EXTENTS_PER_BLOCK(mp)    \
                (((mp)->m_alloc_mxr[0]) - ((mp)->m_alloc_mnr[0]))
#define XFS_EXTENTADD_SPACE_RES(mp,w)   (XFS_BM_MAXLEVELS(mp,w) - 1)
#define XFS_NEXTENTADD_SPACE_RES(mp,b,w)\
        (((b + XFS_MAX_CONTIG_EXTENTS_PER_BLOCK(mp) - 1) / \
          XFS_MAX_CONTIG_EXTENTS_PER_BLOCK(mp)) * \
          XFS_EXTENTADD_SPACE_RES(mp,w))
#define XFS_DAENTER_1B(mp,w)    ((w) == XFS_DATA_FORK ? (mp)->m_dirblkfsbs : 1)
#define XFS_DAENTER_DBS(mp,w)   \
        (XFS_DA_NODE_MAXDEPTH + (((w) == XFS_DATA_FORK) ? 2 : 0))
#define XFS_DAENTER_BLOCKS(mp,w)        \
        (XFS_DAENTER_1B(mp,w) * XFS_DAENTER_DBS(mp,w))
#define XFS_DAENTER_BMAP1B(mp,w)        \
        XFS_NEXTENTADD_SPACE_RES(mp, XFS_DAENTER_1B(mp, w), w)
#define XFS_DAENTER_BMAPS(mp,w)         \
        (XFS_DAENTER_DBS(mp,w) * XFS_DAENTER_BMAP1B(mp,w))
#define XFS_DAENTER_SPACE_RES(mp,w)     \
        (XFS_DAENTER_BLOCKS(mp,w) + XFS_DAENTER_BMAPS(mp,w))
#define XFS_DAREMOVE_SPACE_RES(mp,w)    XFS_DAENTER_BMAPS(mp,w)
#define XFS_DIRENTER_MAX_SPLIT(mp,nl)   1
#define XFS_DIRENTER_SPACE_RES(mp,nl)   \
        (XFS_DAENTER_SPACE_RES(mp, XFS_DATA_FORK) * \
         XFS_DIRENTER_MAX_SPLIT(mp,nl))
#define XFS_DIRREMOVE_SPACE_RES(mp)     \
        XFS_DAREMOVE_SPACE_RES(mp, XFS_DATA_FORK)
#define XFS_IALLOC_SPACE_RES(mp)        \
        (XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp)-1)

/*
 * Space reservation values for various transactions.
 */
#define XFS_ADDAFORK_SPACE_RES(mp)      \
        ((mp)->m_dirblkfsbs + XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK))
#define XFS_ATTRRM_SPACE_RES(mp)        \
        XFS_DAREMOVE_SPACE_RES(mp, XFS_ATTR_FORK)
/* This macro is not used - see inline code in xfs_attr_set */
#define XFS_ATTRSET_SPACE_RES(mp, v)    \
        (XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK) + XFS_B_TO_FSB(mp, v))
#define XFS_CREATE_SPACE_RES(mp,nl)     \
        (XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl))
#define XFS_DIOSTRAT_SPACE_RES(mp, v)   \
        (XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK) + (v))
#define XFS_GROWFS_SPACE_RES(mp)        \
        (2 * XFS_AG_MAXLEVELS(mp))
#define XFS_GROWFSRT_SPACE_RES(mp,b)    \
        ((b) + XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK))
#define XFS_LINK_SPACE_RES(mp,nl)       \
        XFS_DIRENTER_SPACE_RES(mp,nl)
#define XFS_MKDIR_SPACE_RES(mp,nl)      \
        (XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl))
#define XFS_QM_DQALLOC_SPACE_RES(mp)    \
        (XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK) + \
         XFS_DQUOT_CLUSTER_SIZE_FSB)
#define XFS_QM_QINOCREATE_SPACE_RES(mp) \
        XFS_IALLOC_SPACE_RES(mp)
#define XFS_REMOVE_SPACE_RES(mp)        \
        XFS_DIRREMOVE_SPACE_RES(mp)
#define XFS_RENAME_SPACE_RES(mp,nl)     \
        (XFS_DIRREMOVE_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl))
#define XFS_SYMLINK_SPACE_RES(mp,nl,b)  \
        (XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl) + (b))

#endif  /* __XFS_TRANS_SPACE_H__ */

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