root/fs/xfs/libxfs/xfs_trans_space.h

INCLUDED FROM

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2000,2005 Silicon Graphics, Inc.
   4  * All Rights Reserved.
   5  */
   6 #ifndef __XFS_TRANS_SPACE_H__
   7 #define __XFS_TRANS_SPACE_H__
   8 
   9 /*
  10  * Components of space reservations.
  11  */
  12 
  13 /* Worst case number of rmaps that can be held in a block. */
  14 #define XFS_MAX_CONTIG_RMAPS_PER_BLOCK(mp)    \
  15                 (((mp)->m_rmap_mxr[0]) - ((mp)->m_rmap_mnr[0]))
  16 
  17 /* Adding one rmap could split every level up to the top of the tree. */
  18 #define XFS_RMAPADD_SPACE_RES(mp) ((mp)->m_rmap_maxlevels)
  19 
  20 /* Blocks we might need to add "b" rmaps to a tree. */
  21 #define XFS_NRMAPADD_SPACE_RES(mp, b)\
  22         (((b + XFS_MAX_CONTIG_RMAPS_PER_BLOCK(mp) - 1) / \
  23           XFS_MAX_CONTIG_RMAPS_PER_BLOCK(mp)) * \
  24           XFS_RMAPADD_SPACE_RES(mp))
  25 
  26 #define XFS_MAX_CONTIG_EXTENTS_PER_BLOCK(mp)    \
  27                 (((mp)->m_alloc_mxr[0]) - ((mp)->m_alloc_mnr[0]))
  28 #define XFS_EXTENTADD_SPACE_RES(mp,w)   (XFS_BM_MAXLEVELS(mp,w) - 1)
  29 #define XFS_NEXTENTADD_SPACE_RES(mp,b,w)\
  30         (((b + XFS_MAX_CONTIG_EXTENTS_PER_BLOCK(mp) - 1) / \
  31           XFS_MAX_CONTIG_EXTENTS_PER_BLOCK(mp)) * \
  32           XFS_EXTENTADD_SPACE_RES(mp,w))
  33 
  34 /* Blocks we might need to add "b" mappings & rmappings to a file. */
  35 #define XFS_SWAP_RMAP_SPACE_RES(mp,b,w)\
  36         (XFS_NEXTENTADD_SPACE_RES((mp), (b), (w)) + \
  37          XFS_NRMAPADD_SPACE_RES((mp), (b)))
  38 
  39 #define XFS_DAENTER_1B(mp,w)    \
  40         ((w) == XFS_DATA_FORK ? (mp)->m_dir_geo->fsbcount : 1)
  41 #define XFS_DAENTER_DBS(mp,w)   \
  42         (XFS_DA_NODE_MAXDEPTH + (((w) == XFS_DATA_FORK) ? 2 : 0))
  43 #define XFS_DAENTER_BLOCKS(mp,w)        \
  44         (XFS_DAENTER_1B(mp,w) * XFS_DAENTER_DBS(mp,w))
  45 #define XFS_DAENTER_BMAP1B(mp,w)        \
  46         XFS_NEXTENTADD_SPACE_RES(mp, XFS_DAENTER_1B(mp, w), w)
  47 #define XFS_DAENTER_BMAPS(mp,w)         \
  48         (XFS_DAENTER_DBS(mp,w) * XFS_DAENTER_BMAP1B(mp,w))
  49 #define XFS_DAENTER_SPACE_RES(mp,w)     \
  50         (XFS_DAENTER_BLOCKS(mp,w) + XFS_DAENTER_BMAPS(mp,w))
  51 #define XFS_DAREMOVE_SPACE_RES(mp,w)    XFS_DAENTER_BMAPS(mp,w)
  52 #define XFS_DIRENTER_MAX_SPLIT(mp,nl)   1
  53 #define XFS_DIRENTER_SPACE_RES(mp,nl)   \
  54         (XFS_DAENTER_SPACE_RES(mp, XFS_DATA_FORK) * \
  55          XFS_DIRENTER_MAX_SPLIT(mp,nl))
  56 #define XFS_DIRREMOVE_SPACE_RES(mp)     \
  57         XFS_DAREMOVE_SPACE_RES(mp, XFS_DATA_FORK)
  58 #define XFS_IALLOC_SPACE_RES(mp)        \
  59         (M_IGEO(mp)->ialloc_blks + \
  60          (xfs_sb_version_hasfinobt(&mp->m_sb) ? 2 : 1 * \
  61           (M_IGEO(mp)->inobt_maxlevels - 1)))
  62 
  63 /*
  64  * Space reservation values for various transactions.
  65  */
  66 #define XFS_ADDAFORK_SPACE_RES(mp)      \
  67         ((mp)->m_dir_geo->fsbcount + XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK))
  68 #define XFS_ATTRRM_SPACE_RES(mp)        \
  69         XFS_DAREMOVE_SPACE_RES(mp, XFS_ATTR_FORK)
  70 /* This macro is not used - see inline code in xfs_attr_set */
  71 #define XFS_ATTRSET_SPACE_RES(mp, v)    \
  72         (XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK) + XFS_B_TO_FSB(mp, v))
  73 #define XFS_CREATE_SPACE_RES(mp,nl)     \
  74         (XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl))
  75 #define XFS_DIOSTRAT_SPACE_RES(mp, v)   \
  76         (XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK) + (v))
  77 #define XFS_GROWFS_SPACE_RES(mp)        \
  78         (2 * (mp)->m_ag_maxlevels)
  79 #define XFS_GROWFSRT_SPACE_RES(mp,b)    \
  80         ((b) + XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK))
  81 #define XFS_LINK_SPACE_RES(mp,nl)       \
  82         XFS_DIRENTER_SPACE_RES(mp,nl)
  83 #define XFS_MKDIR_SPACE_RES(mp,nl)      \
  84         (XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl))
  85 #define XFS_QM_DQALLOC_SPACE_RES(mp)    \
  86         (XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK) + \
  87          XFS_DQUOT_CLUSTER_SIZE_FSB)
  88 #define XFS_QM_QINOCREATE_SPACE_RES(mp) \
  89         XFS_IALLOC_SPACE_RES(mp)
  90 #define XFS_REMOVE_SPACE_RES(mp)        \
  91         XFS_DIRREMOVE_SPACE_RES(mp)
  92 #define XFS_RENAME_SPACE_RES(mp,nl)     \
  93         (XFS_DIRREMOVE_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl))
  94 #define XFS_SYMLINK_SPACE_RES(mp,nl,b)  \
  95         (XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl) + (b))
  96 #define XFS_IFREE_SPACE_RES(mp)         \
  97         (xfs_sb_version_hasfinobt(&mp->m_sb) ? \
  98                         M_IGEO(mp)->inobt_maxlevels : 0)
  99 
 100 
 101 #endif  /* __XFS_TRANS_SPACE_H__ */