fs/xfs/libxfs/xfs_trans_space.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2000,2005 Silicon Graphics, Inc.
   4  * All Rights Reserved.
   5  */
   6 #include "xfs.h"
   7 #include "xfs_fs.h"
   8 #include "xfs_shared.h"
   9 #include "xfs_format.h"
  10 #include "xfs_da_format.h"
  11 #include "xfs_log_format.h"
  12 #include "xfs_trans_resv.h"
  13 #include "xfs_mount.h"
  14 #include "xfs_da_btree.h"
  15 #include "xfs_bmap_btree.h"
  16 #include "xfs_trans_space.h"
  17
  18 /* Calculate the disk space required to add a parent pointer. */
  19 unsigned int
  20 xfs_parent_calc_space_res(
  21         struct xfs_mount        *mp,
  22         unsigned int            namelen)
  23 {
  24         /*
  25          * Parent pointers are always the first attr in an attr tree, and never
  26          * larger than a block
  27          */
  28         return XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK) +
  29                XFS_NEXTENTADD_SPACE_RES(mp, namelen, XFS_ATTR_FORK);
  30 }
  31
  32 unsigned int
  33 xfs_create_space_res(
  34         struct xfs_mount        *mp,
  35         unsigned int            namelen)
  36 {
  37         unsigned int            ret;
  38
  39         ret = XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp, namelen);
  40         if (xfs_has_parent(mp))
  41                 ret += xfs_parent_calc_space_res(mp, namelen);
  42
  43         return ret;
  44 }
  45
  46 unsigned int
  47 xfs_mkdir_space_res(
  48         struct xfs_mount        *mp,
  49         unsigned int            namelen)
  50 {
  51         return xfs_create_space_res(mp, namelen);
  52 }
  53
  54 unsigned int
  55 xfs_link_space_res(
  56         struct xfs_mount        *mp,
  57         unsigned int            namelen)
  58 {
  59         unsigned int            ret;
  60
  61         ret = XFS_DIRENTER_SPACE_RES(mp, namelen);
  62         if (xfs_has_parent(mp))
  63                 ret += xfs_parent_calc_space_res(mp, namelen);
  64
  65         return ret;
  66 }
  67
  68 unsigned int
  69 xfs_symlink_space_res(
  70         struct xfs_mount        *mp,
  71         unsigned int            namelen,
  72         unsigned int            fsblocks)
  73 {
  74         unsigned int            ret;
  75
  76         ret = XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp, namelen) +
  77                         fsblocks;
  78
  79         if (xfs_has_parent(mp))
  80                 ret += xfs_parent_calc_space_res(mp, namelen);
  81
  82         return ret;
  83 }
  84
  85 unsigned int
  86 xfs_remove_space_res(
  87         struct xfs_mount        *mp,
  88         unsigned int            namelen)
  89 {
  90         unsigned int            ret = XFS_DIRREMOVE_SPACE_RES(mp);
  91
  92         if (xfs_has_parent(mp))
  93                 ret += xfs_parent_calc_space_res(mp, namelen);
  94
  95         return ret;
  96 }
  97
  98 unsigned int
  99 xfs_rename_space_res(
 100         struct xfs_mount        *mp,
 101         unsigned int            src_namelen,
 102         bool                    target_exists,
 103         unsigned int            target_namelen,
 104         bool                    has_whiteout)
 105 {
 106         unsigned int            ret;
 107
 108         ret = XFS_DIRREMOVE_SPACE_RES(mp) +
 109                         XFS_DIRENTER_SPACE_RES(mp, target_namelen);
 110
 111         if (xfs_has_parent(mp)) {
 112                 if (has_whiteout)
 113                         ret += xfs_parent_calc_space_res(mp, src_namelen);
 114                 ret += 2 * xfs_parent_calc_space_res(mp, target_namelen);
 115         }
 116
 117         if (target_exists)
 118                 ret += xfs_parent_calc_space_res(mp, target_namelen);
 119
 120         return ret;
 121 }