fs/xfs/libxfs/xfs_trans_resv.h

   1 /*
   2  * Copyright (c) 2000-2002,2005 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_RESV_H__
  19 #define __XFS_TRANS_RESV_H__
  20
  21 struct xfs_mount;
  22
  23 /*
  24  * structure for maintaining pre-calculated transaction reservations.
  25  */
  26 struct xfs_trans_res {
  27         uint    tr_logres;      /* log space unit in bytes per log ticket */
  28         int     tr_logcount;    /* number of log operations per log ticket */
  29         int     tr_logflags;    /* log flags, currently only used for indicating
  30                                  * a reservation request is permanent or not */
  31 };
  32
  33 struct xfs_trans_resv {
  34         struct xfs_trans_res    tr_write;       /* extent alloc trans */
  35         struct xfs_trans_res    tr_itruncate;   /* truncate trans */
  36         struct xfs_trans_res    tr_rename;      /* rename trans */
  37         struct xfs_trans_res    tr_link;        /* link trans */
  38         struct xfs_trans_res    tr_remove;      /* unlink trans */
  39         struct xfs_trans_res    tr_symlink;     /* symlink trans */
  40         struct xfs_trans_res    tr_create;      /* create trans */
  41         struct xfs_trans_res    tr_create_tmpfile; /* create O_TMPFILE trans */
  42         struct xfs_trans_res    tr_mkdir;       /* mkdir trans */
  43         struct xfs_trans_res    tr_ifree;       /* inode free trans */
  44         struct xfs_trans_res    tr_ichange;     /* inode update trans */
  45         struct xfs_trans_res    tr_growdata;    /* fs data section grow trans */
  46         struct xfs_trans_res    tr_addafork;    /* add inode attr fork trans */
  47         struct xfs_trans_res    tr_writeid;     /* write setuid/setgid file */
  48         struct xfs_trans_res    tr_attrinval;   /* attr fork buffer
  49                                                  * invalidation */
  50         struct xfs_trans_res    tr_attrsetm;    /* set/create an attribute at
  51                                                  * mount time */
  52         struct xfs_trans_res    tr_attrsetrt;   /* set/create an attribute at
  53                                                  * runtime */
  54         struct xfs_trans_res    tr_attrrm;      /* remove an attribute */
  55         struct xfs_trans_res    tr_clearagi;    /* clear agi unlinked bucket */
  56         struct xfs_trans_res    tr_growrtalloc; /* grow realtime allocations */
  57         struct xfs_trans_res    tr_growrtzero;  /* grow realtime zeroing */
  58         struct xfs_trans_res    tr_growrtfree;  /* grow realtime freeing */
  59         struct xfs_trans_res    tr_qm_setqlim;  /* adjust quota limits */
  60         struct xfs_trans_res    tr_qm_dqalloc;  /* allocate quota on disk */
  61         struct xfs_trans_res    tr_qm_quotaoff; /* turn quota off */
  62         struct xfs_trans_res    tr_qm_equotaoff;/* end of turn quota off */
  63         struct xfs_trans_res    tr_sb;          /* modify superblock */
  64         struct xfs_trans_res    tr_fsyncts;     /* update timestamps on fsync */
  65 };
  66
  67 /* shorthand way of accessing reservation structure */
  68 #define M_RES(mp)       (&(mp)->m_resv)
  69
  70 /*
  71  * Per-extent log reservation for the allocation btree changes
  72  * involved in freeing or allocating an extent.
  73  * 2 trees * (2 blocks/level * max depth - 1) * block size
  74  */
  75 #define XFS_ALLOCFREE_LOG_RES(mp,nx) \
  76         ((nx) * (2 * XFS_FSB_TO_B((mp), 2 * (mp)->m_ag_maxlevels - 1)))
  77 #define XFS_ALLOCFREE_LOG_COUNT(mp,nx) \
  78         ((nx) * (2 * (2 * (mp)->m_ag_maxlevels - 1)))
  79
  80 /*
  81  * Per-directory log reservation for any directory change.
  82  * dir blocks: (1 btree block per level + data block + free block) * dblock size
  83  * bmap btree: (levels + 2) * max depth * block size
  84  * v2 directory blocks can be fragmented below the dirblksize down to the fsb
  85  * size, so account for that in the DAENTER macros.
  86  */
  87 #define XFS_DIROP_LOG_RES(mp)   \
  88         (XFS_FSB_TO_B(mp, XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK)) + \
  89          (XFS_FSB_TO_B(mp, XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)))
  90 #define XFS_DIROP_LOG_COUNT(mp) \
  91         (XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK) + \
  92          XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)
  93
  94 /*
  95  * Various log count values.
  96  */
  97 #define XFS_DEFAULT_LOG_COUNT           1
  98 #define XFS_DEFAULT_PERM_LOG_COUNT      2
  99 #define XFS_ITRUNCATE_LOG_COUNT         2
 100 #define XFS_INACTIVE_LOG_COUNT          2
 101 #define XFS_CREATE_LOG_COUNT            2
 102 #define XFS_CREATE_TMPFILE_LOG_COUNT    2
 103 #define XFS_MKDIR_LOG_COUNT             3
 104 #define XFS_SYMLINK_LOG_COUNT           3
 105 #define XFS_REMOVE_LOG_COUNT            2
 106 #define XFS_LINK_LOG_COUNT              2
 107 #define XFS_RENAME_LOG_COUNT            2
 108 #define XFS_WRITE_LOG_COUNT             2
 109 #define XFS_ADDAFORK_LOG_COUNT          2
 110 #define XFS_ATTRINVAL_LOG_COUNT         1
 111 #define XFS_ATTRSET_LOG_COUNT           3
 112 #define XFS_ATTRRM_LOG_COUNT            3
 113
 114 void xfs_trans_resv_calc(struct xfs_mount *mp, struct xfs_trans_resv *resp);
 115
 116 #endif  /* __XFS_TRANS_RESV_H__ */