LXR linux/fs/xfs/libxfs/xfs_trans

   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
  25/* Worst case number of rmaps that can be held in a block. */
  26#define XFS_MAX_CONTIG_RMAPS_PER_BLOCK(mp)    \
  27                (((mp)->m_rmap_mxr[0]) - ((mp)->m_rmap_mnr[0]))
  28
  29/* Adding one rmap could split every level up to the top of the tree. */
  30#define XFS_RMAPADD_SPACE_RES(mp) ((mp)->m_rmap_maxlevels)
  31
  32/* Blocks we might need to add "b" rmaps to a tree. */
  33#define XFS_NRMAPADD_SPACE_RES(mp, b)\
  34        (((b + XFS_MAX_CONTIG_RMAPS_PER_BLOCK(mp) - 1) / \
  35          XFS_MAX_CONTIG_RMAPS_PER_BLOCK(mp)) * \
  36          XFS_RMAPADD_SPACE_RES(mp))
  37
  38#define XFS_MAX_CONTIG_EXTENTS_PER_BLOCK(mp)    \
  39                (((mp)->m_alloc_mxr[0]) - ((mp)->m_alloc_mnr[0]))
  40#define XFS_EXTENTADD_SPACE_RES(mp,w)   (XFS_BM_MAXLEVELS(mp,w) - 1)
  41#define XFS_NEXTENTADD_SPACE_RES(mp,b,w)\
  42        (((b + XFS_MAX_CONTIG_EXTENTS_PER_BLOCK(mp) - 1) / \
  43          XFS_MAX_CONTIG_EXTENTS_PER_BLOCK(mp)) * \
  44          XFS_EXTENTADD_SPACE_RES(mp,w))
  45
  46/* Blocks we might need to add "b" mappings & rmappings to a file. */
  47#define XFS_SWAP_RMAP_SPACE_RES(mp,b,w)\
  48        (XFS_NEXTENTADD_SPACE_RES((mp), (b), (w)) + \
  49         XFS_NRMAPADD_SPACE_RES((mp), (b)))
  50
  51#define XFS_DAENTER_1B(mp,w)    \
  52        ((w) == XFS_DATA_FORK ? (mp)->m_dir_geo->fsbcount : 1)
  53#define XFS_DAENTER_DBS(mp,w)   \
  54        (XFS_DA_NODE_MAXDEPTH + (((w) == XFS_DATA_FORK) ? 2 : 0))
  55#define XFS_DAENTER_BLOCKS(mp,w)        \
  56        (XFS_DAENTER_1B(mp,w) * XFS_DAENTER_DBS(mp,w))
  57#define XFS_DAENTER_BMAP1B(mp,w)        \
  58        XFS_NEXTENTADD_SPACE_RES(mp, XFS_DAENTER_1B(mp, w), w)
  59#define XFS_DAENTER_BMAPS(mp,w)         \
  60        (XFS_DAENTER_DBS(mp,w) * XFS_DAENTER_BMAP1B(mp,w))
  61#define XFS_DAENTER_SPACE_RES(mp,w)     \
  62        (XFS_DAENTER_BLOCKS(mp,w) + XFS_DAENTER_BMAPS(mp,w))
  63#define XFS_DAREMOVE_SPACE_RES(mp,w)    XFS_DAENTER_BMAPS(mp,w)
  64#define XFS_DIRENTER_MAX_SPLIT(mp,nl)   1
  65#define XFS_DIRENTER_SPACE_RES(mp,nl)   \
  66        (XFS_DAENTER_SPACE_RES(mp, XFS_DATA_FORK) * \
  67         XFS_DIRENTER_MAX_SPLIT(mp,nl))
  68#define XFS_DIRREMOVE_SPACE_RES(mp)     \
  69        XFS_DAREMOVE_SPACE_RES(mp, XFS_DATA_FORK)
  70#define XFS_IALLOC_SPACE_RES(mp)        \
  71        ((mp)->m_ialloc_blks + \
  72         (xfs_sb_version_hasfinobt(&mp->m_sb) ? 2 : 1 * \
  73          ((mp)->m_in_maxlevels - 1)))
  74
  75/*
  76 * Space reservation values for various transactions.
  77 */
  78#define XFS_ADDAFORK_SPACE_RES(mp)      \
  79        ((mp)->m_dir_geo->fsbcount + XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK))
  80#define XFS_ATTRRM_SPACE_RES(mp)        \
  81        XFS_DAREMOVE_SPACE_RES(mp, XFS_ATTR_FORK)
  82/* This macro is not used - see inline code in xfs_attr_set */
  83#define XFS_ATTRSET_SPACE_RES(mp, v)    \
  84        (XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK) + XFS_B_TO_FSB(mp, v))
  85#define XFS_CREATE_SPACE_RES(mp,nl)     \
  86        (XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl))
  87#define XFS_DIOSTRAT_SPACE_RES(mp, v)   \
  88        (XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK) + (v))
  89#define XFS_GROWFS_SPACE_RES(mp)        \
  90        (2 * (mp)->m_ag_maxlevels)
  91#define XFS_GROWFSRT_SPACE_RES(mp,b)    \
  92        ((b) + XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK))
  93#define XFS_LINK_SPACE_RES(mp,nl)       \
  94        XFS_DIRENTER_SPACE_RES(mp,nl)
  95#define XFS_MKDIR_SPACE_RES(mp,nl)      \
  96        (XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl))
  97#define XFS_QM_DQALLOC_SPACE_RES(mp)    \
  98        (XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK) + \
  99         XFS_DQUOT_CLUSTER_SIZE_FSB)
 100#define XFS_QM_QINOCREATE_SPACE_RES(mp) \
 101        XFS_IALLOC_SPACE_RES(mp)
 102#define XFS_REMOVE_SPACE_RES(mp)        \
 103        XFS_DIRREMOVE_SPACE_RES(mp)
 104#define XFS_RENAME_SPACE_RES(mp,nl)     \
 105        (XFS_DIRREMOVE_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl))
 106#define XFS_SYMLINK_SPACE_RES(mp,nl,b)  \
 107        (XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl) + (b))
 108#define XFS_IFREE_SPACE_RES(mp)         \
 109        (xfs_sb_version_hasfinobt(&mp->m_sb) ? (mp)->m_in_maxlevels : 0)
 110
 111
 112#endif  /* __XFS_TRANS_SPACE_H__ */
 113