text: /*
   * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
   * All Rights Reserved.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License as
   * published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it would be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write the Free Software Foundation,
   * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
   */
  #ifndef	__XFS_TRANS_RESV_H__
  #define	__XFS_TRANS_RESV_H__
  
  struct xfs_mount;
  
  /*
   * structure for maintaining pre-calculated transaction reservations.
   */
  struct xfs_trans_res {
  	uint	tr_logres;	/* log space unit in bytes per log ticket */
  	int	tr_logcount;	/* number of log operations per log ticket */
  	int	tr_logflags;	/* log flags, currently only used for indicating
  				 * a reservation request is permanent or not */
  };
  
  struct xfs_trans_resv {
  	struct xfs_trans_res	tr_write;	/* extent alloc trans */
  	struct xfs_trans_res	tr_itruncate;	/* truncate trans */
  	struct xfs_trans_res	tr_rename;	/* rename trans */
  	struct xfs_trans_res	tr_link;	/* link trans */
  	struct xfs_trans_res	tr_remove;	/* unlink trans */
  	struct xfs_trans_res	tr_symlink;	/* symlink trans */
  	struct xfs_trans_res	tr_create;	/* create trans */
  	struct xfs_trans_res	tr_create_tmpfile; /* create O_TMPFILE trans */
  	struct xfs_trans_res	tr_mkdir;	/* mkdir trans */
  	struct xfs_trans_res	tr_ifree;	/* inode free trans */
  	struct xfs_trans_res	tr_ichange;	/* inode update trans */
  	struct xfs_trans_res	tr_growdata;	/* fs data section grow trans */
  	struct xfs_trans_res	tr_addafork;	/* add inode attr fork trans */
  	struct xfs_trans_res	tr_writeid;	/* write setuid/setgid file */
  	struct xfs_trans_res	tr_attrinval;	/* attr fork buffer
  						 * invalidation */
  	struct xfs_trans_res	tr_attrsetm;	/* set/create an attribute at
  						 * mount time */
  	struct xfs_trans_res	tr_attrsetrt;	/* set/create an attribute at
  						 * runtime */
  	struct xfs_trans_res	tr_attrrm;	/* remove an attribute */
  	struct xfs_trans_res	tr_clearagi;	/* clear agi unlinked bucket */
  	struct xfs_trans_res	tr_growrtalloc;	/* grow realtime allocations */
  	struct xfs_trans_res	tr_growrtzero;	/* grow realtime zeroing */
  	struct xfs_trans_res	tr_growrtfree;	/* grow realtime freeing */
  	struct xfs_trans_res	tr_qm_setqlim;	/* adjust quota limits */
  	struct xfs_trans_res	tr_qm_dqalloc;	/* allocate quota on disk */
  	struct xfs_trans_res	tr_qm_quotaoff;	/* turn quota off */
  	struct xfs_trans_res	tr_qm_equotaoff;/* end of turn quota off */
  	struct xfs_trans_res	tr_sb;		/* modify superblock */
  	struct xfs_trans_res	tr_fsyncts;	/* update timestamps on fsync */
  };
  
  /* shorthand way of accessing reservation structure */
  #define M_RES(mp)	(&(mp)->m_resv)
  
  /*
   * Per-directory log reservation for any directory change.
   * dir blocks: (1 btree block per level + data block + free block) * dblock size
   * bmap btree: (levels + 2) * max depth * block size
   * v2 directory blocks can be fragmented below the dirblksize down to the fsb
   * size, so account for that in the DAENTER macros.
   */
  #define	XFS_DIROP_LOG_RES(mp)	\
  	(XFS_FSB_TO_B(mp, XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK)) + \
  	 (XFS_FSB_TO_B(mp, XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)))
  #define	XFS_DIROP_LOG_COUNT(mp)	\
  	(XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK) + \
  	 XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)
  
  /*
   * Various log count values.
   */
  #define	XFS_DEFAULT_LOG_COUNT		1
  #define	XFS_DEFAULT_PERM_LOG_COUNT	2
  #define	XFS_ITRUNCATE_LOG_COUNT		2
  #define	XFS_ITRUNCATE_LOG_COUNT_REFLINK	8
  #define XFS_INACTIVE_LOG_COUNT		2
  #define	XFS_CREATE_LOG_COUNT		2
  #define	XFS_CREATE_TMPFILE_LOG_COUNT	2
  #define	XFS_MKDIR_LOG_COUNT		3
  #define	XFS_SYMLINK_LOG_COUNT		3
  #define	XFS_REMOVE_LOG_COUNT		2
  #define	XFS_LINK_LOG_COUNT		2
  #define	XFS_RENAME_LOG_COUNT		2
  #define	XFS_WRITE_LOG_COUNT		2
  #define	XFS_WRITE_LOG_COUNT_REFLINK	8
  #define	XFS_ADDAFORK_LOG_COUNT		2
  #define	XFS_ATTRINVAL_LOG_COUNT		1
  #define	XFS_ATTRSET_LOG_COUNT		3
  #define	XFS_ATTRRM_LOG_COUNT		3
  
  void xfs_trans_resv_calc(struct xfs_mount *mp, struct xfs_trans_resv *resp);
  uint xfs_allocfree_log_count(struct xfs_mount *mp, uint num_ops);
  
  #endif	/* __XFS_TRANS_RESV_H__ */
  