fs/xfs/libxfs/xfs_trans_space.h

   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__ */