LXR linux/fs/xfs/libxfs/xfs_trans

   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
  21struct xfs_mount;
  22
  23/*
  24 * structure for maintaining pre-calculated transaction reservations.
  25 */
  26struct 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
  33struct 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
 114void xfs_trans_resv_calc(struct xfs_mount *mp, struct xfs_trans_resv *resp);
 115
 116#endif  /* __XFS_TRANS_RESV_H__ */
 117