linux/fs/xfs/xfs_trans_space.h
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   1/*
   2 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
   3 * All Rights Reserved.
   4 *
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of the GNU General Public License as
   7 * published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it would be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write the Free Software Foundation,
  16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17 */
  18#ifndef __XFS_TRANS_SPACE_H__
  19#define __XFS_TRANS_SPACE_H__
  20
  21/*
  22 * Components of space reservations.
  23 */
  24#define XFS_MAX_CONTIG_EXTENTS_PER_BLOCK(mp)    \
  25                (((mp)->m_alloc_mxr[0]) - ((mp)->m_alloc_mnr[0]))
  26#define XFS_EXTENTADD_SPACE_RES(mp,w)   (XFS_BM_MAXLEVELS(mp,w) - 1)
  27#define XFS_NEXTENTADD_SPACE_RES(mp,b,w)\
  28        (((b + XFS_MAX_CONTIG_EXTENTS_PER_BLOCK(mp) - 1) / \
  29          XFS_MAX_CONTIG_EXTENTS_PER_BLOCK(mp)) * \
  30          XFS_EXTENTADD_SPACE_RES(mp,w))
  31#define XFS_DAENTER_1B(mp,w)    ((w) == XFS_DATA_FORK ? (mp)->m_dirblkfsbs : 1)
  32#define XFS_DAENTER_DBS(mp,w)   \
  33        (XFS_DA_NODE_MAXDEPTH + (((w) == XFS_DATA_FORK) ? 2 : 0))
  34#define XFS_DAENTER_BLOCKS(mp,w)        \
  35        (XFS_DAENTER_1B(mp,w) * XFS_DAENTER_DBS(mp,w))
  36#define XFS_DAENTER_BMAP1B(mp,w)        \
  37        XFS_NEXTENTADD_SPACE_RES(mp, XFS_DAENTER_1B(mp, w), w)
  38#define XFS_DAENTER_BMAPS(mp,w)         \
  39        (XFS_DAENTER_DBS(mp,w) * XFS_DAENTER_BMAP1B(mp,w))
  40#define XFS_DAENTER_SPACE_RES(mp,w)     \
  41        (XFS_DAENTER_BLOCKS(mp,w) + XFS_DAENTER_BMAPS(mp,w))
  42#define XFS_DAREMOVE_SPACE_RES(mp,w)    XFS_DAENTER_BMAPS(mp,w)
  43#define XFS_DIRENTER_MAX_SPLIT(mp,nl)   1
  44#define XFS_DIRENTER_SPACE_RES(mp,nl)   \
  45        (XFS_DAENTER_SPACE_RES(mp, XFS_DATA_FORK) * \
  46         XFS_DIRENTER_MAX_SPLIT(mp,nl))
  47#define XFS_DIRREMOVE_SPACE_RES(mp)     \
  48        XFS_DAREMOVE_SPACE_RES(mp, XFS_DATA_FORK)
  49#define XFS_IALLOC_SPACE_RES(mp)        \
  50        (XFS_IALLOC_BLOCKS(mp) + (mp)->m_in_maxlevels - 1)
  51
  52/*
  53 * Space reservation values for various transactions.
  54 */
  55#define XFS_ADDAFORK_SPACE_RES(mp)      \
  56        ((mp)->m_dirblkfsbs + XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK))
  57#define XFS_ATTRRM_SPACE_RES(mp)        \
  58        XFS_DAREMOVE_SPACE_RES(mp, XFS_ATTR_FORK)
  59/* This macro is not used - see inline code in xfs_attr_set */
  60#define XFS_ATTRSET_SPACE_RES(mp, v)    \
  61        (XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK) + XFS_B_TO_FSB(mp, v))
  62#define XFS_CREATE_SPACE_RES(mp,nl)     \
  63        (XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl))
  64#define XFS_DIOSTRAT_SPACE_RES(mp, v)   \
  65        (XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK) + (v))
  66#define XFS_GROWFS_SPACE_RES(mp)        \
  67        (2 * XFS_AG_MAXLEVELS(mp))
  68#define XFS_GROWFSRT_SPACE_RES(mp,b)    \
  69        ((b) + XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK))
  70#define XFS_LINK_SPACE_RES(mp,nl)       \
  71        XFS_DIRENTER_SPACE_RES(mp,nl)
  72#define XFS_MKDIR_SPACE_RES(mp,nl)      \
  73        (XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl))
  74#define XFS_QM_DQALLOC_SPACE_RES(mp)    \
  75        (XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK) + \
  76         XFS_DQUOT_CLUSTER_SIZE_FSB)
  77#define XFS_QM_QINOCREATE_SPACE_RES(mp) \
  78        XFS_IALLOC_SPACE_RES(mp)
  79#define XFS_REMOVE_SPACE_RES(mp)        \
  80        XFS_DIRREMOVE_SPACE_RES(mp)
  81#define XFS_RENAME_SPACE_RES(mp,nl)     \
  82        (XFS_DIRREMOVE_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl))
  83#define XFS_SYMLINK_SPACE_RES(mp,nl,b)  \
  84        (XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl) + (b))
  85
  86#endif  /* __XFS_TRANS_SPACE_H__ */
  87
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