/*

   * 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_H__
  #define	__XFS_TRANS_H__

  struct xfs_log_item;

  /*
   * This is the structure written in the log at the head of
   * every transaction. It identifies the type and id of the
   * transaction, and contains the number of items logged by
   * the transaction so we know how many to expect during recovery.
   *
   * Do not change the below structure without redoing the code in
   * xlog_recover_add_to_trans() and xlog_recover_add_to_cont_trans().
   */
  typedef struct xfs_trans_header {
  	uint		th_magic;		/* magic number */
  	uint		th_type;		/* transaction type */
  	__int32_t	th_tid;			/* transaction id (unused) */
  	uint		th_num_items;		/* num items logged by trans */
  } xfs_trans_header_t;
  
  #define	XFS_TRANS_HEADER_MAGIC	0x5452414e	/* TRAN */
  
  /*
   * Log item types.
   */

  #define	XFS_LI_EFI		0x1236
  #define	XFS_LI_EFD		0x1237
  #define	XFS_LI_IUNLINK		0x1238

  #define	XFS_LI_INODE		0x123b	/* aligned ino chunks, var-size ibufs */
  #define	XFS_LI_BUF		0x123c	/* v2 bufs, variable sized inode bufs */
  #define	XFS_LI_DQUOT		0x123d
  #define	XFS_LI_QUOTAOFF		0x123e

  #define XFS_LI_TYPE_DESC \
  	{ XFS_LI_EFI,		"XFS_LI_EFI" }, \
  	{ XFS_LI_EFD,		"XFS_LI_EFD" }, \
  	{ XFS_LI_IUNLINK,	"XFS_LI_IUNLINK" }, \
  	{ XFS_LI_INODE,		"XFS_LI_INODE" }, \
  	{ XFS_LI_BUF,		"XFS_LI_BUF" }, \
  	{ XFS_LI_DQUOT,		"XFS_LI_DQUOT" }, \
  	{ XFS_LI_QUOTAOFF,	"XFS_LI_QUOTAOFF" }

  /*
   * Transaction types.  Used to distinguish types of buffers.
   */
  #define XFS_TRANS_SETATTR_NOT_SIZE	1
  #define XFS_TRANS_SETATTR_SIZE		2
  #define XFS_TRANS_INACTIVE		3
  #define XFS_TRANS_CREATE		4
  #define XFS_TRANS_CREATE_TRUNC		5
  #define XFS_TRANS_TRUNCATE_FILE		6
  #define XFS_TRANS_REMOVE		7
  #define XFS_TRANS_LINK			8
  #define XFS_TRANS_RENAME		9
  #define XFS_TRANS_MKDIR			10
  #define XFS_TRANS_RMDIR			11
  #define XFS_TRANS_SYMLINK		12
  #define XFS_TRANS_SET_DMATTRS		13
  #define XFS_TRANS_GROWFS		14
  #define XFS_TRANS_STRAT_WRITE		15
  #define XFS_TRANS_DIOSTRAT		16

  /* 17 was XFS_TRANS_WRITE_SYNC */

  #define	XFS_TRANS_WRITEID		18
  #define	XFS_TRANS_ADDAFORK		19
  #define	XFS_TRANS_ATTRINVAL		20
  #define	XFS_TRANS_ATRUNCATE		21
  #define	XFS_TRANS_ATTR_SET		22
  #define	XFS_TRANS_ATTR_RM		23
  #define	XFS_TRANS_ATTR_FLAG		24
  #define	XFS_TRANS_CLEAR_AGI_BUCKET	25
  #define XFS_TRANS_QM_SBCHANGE		26
  /*
   * Dummy entries since we use the transaction type to index into the
   * trans_type[] in xlog_recover_print_trans_head()
   */
  #define XFS_TRANS_DUMMY1		27
  #define XFS_TRANS_DUMMY2		28
  #define XFS_TRANS_QM_QUOTAOFF		29
  #define XFS_TRANS_QM_DQALLOC		30
  #define XFS_TRANS_QM_SETQLIM		31
  #define XFS_TRANS_QM_DQCLUSTER		32
  #define XFS_TRANS_QM_QINOCREATE		33
  #define XFS_TRANS_QM_QUOTAOFF_END	34
  #define XFS_TRANS_SB_UNIT		35
  #define XFS_TRANS_FSYNC_TS		36
  #define	XFS_TRANS_GROWFSRT_ALLOC	37
  #define	XFS_TRANS_GROWFSRT_ZERO		38
  #define	XFS_TRANS_GROWFSRT_FREE		39
  #define	XFS_TRANS_SWAPEXT		40

  #define	XFS_TRANS_SB_COUNT		41

  #define	XFS_TRANS_CHECKPOINT		42
  #define	XFS_TRANS_TYPE_MAX		42

  /* new transaction types need to be reflected in xfs_logprint(8) */

  #define XFS_TRANS_TYPES \
  	{ XFS_TRANS_SETATTR_NOT_SIZE,	"SETATTR_NOT_SIZE" }, \
  	{ XFS_TRANS_SETATTR_SIZE,	"SETATTR_SIZE" }, \
  	{ XFS_TRANS_INACTIVE,		"INACTIVE" }, \
  	{ XFS_TRANS_CREATE,		"CREATE" }, \
  	{ XFS_TRANS_CREATE_TRUNC,	"CREATE_TRUNC" }, \
  	{ XFS_TRANS_TRUNCATE_FILE,	"TRUNCATE_FILE" }, \
  	{ XFS_TRANS_REMOVE,		"REMOVE" }, \
  	{ XFS_TRANS_LINK,		"LINK" }, \
  	{ XFS_TRANS_RENAME,		"RENAME" }, \
  	{ XFS_TRANS_MKDIR,		"MKDIR" }, \
  	{ XFS_TRANS_RMDIR,		"RMDIR" }, \
  	{ XFS_TRANS_SYMLINK,		"SYMLINK" }, \
  	{ XFS_TRANS_SET_DMATTRS,	"SET_DMATTRS" }, \
  	{ XFS_TRANS_GROWFS,		"GROWFS" }, \
  	{ XFS_TRANS_STRAT_WRITE,	"STRAT_WRITE" }, \
  	{ XFS_TRANS_DIOSTRAT,		"DIOSTRAT" }, \
  	{ XFS_TRANS_WRITEID,		"WRITEID" }, \
  	{ XFS_TRANS_ADDAFORK,		"ADDAFORK" }, \
  	{ XFS_TRANS_ATTRINVAL,		"ATTRINVAL" }, \
  	{ XFS_TRANS_ATRUNCATE,		"ATRUNCATE" }, \
  	{ XFS_TRANS_ATTR_SET,		"ATTR_SET" }, \
  	{ XFS_TRANS_ATTR_RM,		"ATTR_RM" }, \
  	{ XFS_TRANS_ATTR_FLAG,		"ATTR_FLAG" }, \
  	{ XFS_TRANS_CLEAR_AGI_BUCKET,	"CLEAR_AGI_BUCKET" }, \
  	{ XFS_TRANS_QM_SBCHANGE,	"QM_SBCHANGE" }, \
  	{ XFS_TRANS_QM_QUOTAOFF,	"QM_QUOTAOFF" }, \
  	{ XFS_TRANS_QM_DQALLOC,		"QM_DQALLOC" }, \
  	{ XFS_TRANS_QM_SETQLIM,		"QM_SETQLIM" }, \
  	{ XFS_TRANS_QM_DQCLUSTER,	"QM_DQCLUSTER" }, \
  	{ XFS_TRANS_QM_QINOCREATE,	"QM_QINOCREATE" }, \
  	{ XFS_TRANS_QM_QUOTAOFF_END,	"QM_QOFF_END" }, \
  	{ XFS_TRANS_SB_UNIT,		"SB_UNIT" }, \
  	{ XFS_TRANS_FSYNC_TS,		"FSYNC_TS" }, \
  	{ XFS_TRANS_GROWFSRT_ALLOC,	"GROWFSRT_ALLOC" }, \
  	{ XFS_TRANS_GROWFSRT_ZERO,	"GROWFSRT_ZERO" }, \
  	{ XFS_TRANS_GROWFSRT_FREE,	"GROWFSRT_FREE" }, \
  	{ XFS_TRANS_SWAPEXT,		"SWAPEXT" }, \
  	{ XFS_TRANS_SB_COUNT,		"SB_COUNT" }, \

  	{ XFS_TRANS_CHECKPOINT,		"CHECKPOINT" }, \

  	{ XFS_TRANS_DUMMY1,		"DUMMY1" }, \
  	{ XFS_TRANS_DUMMY2,		"DUMMY2" }, \
  	{ XLOG_UNMOUNT_REC_TYPE,	"UNMOUNT" }

  /*
   * This structure is used to track log items associated with
   * a transaction.  It points to the log item and keeps some
   * flags to track the state of the log item.  It also tracks
   * the amount of space needed to log the item it describes
   * once we get to commit processing (see xfs_trans_commit()).
   */

  struct xfs_log_item_desc {

  	struct xfs_log_item	*lid_item;

  	ushort			lid_size;
  	unsigned char		lid_flags;
  	struct list_head	lid_trans;
  };

  
  #define XFS_LID_DIRTY		0x1

  #define	XFS_TRANS_MAGIC		0x5452414E	/* 'TRAN' */
  /*
   * Values for t_flags.
   */
  #define	XFS_TRANS_DIRTY		0x01	/* something needs to be logged */
  #define	XFS_TRANS_SB_DIRTY	0x02	/* superblock is modified */
  #define	XFS_TRANS_PERM_LOG_RES	0x04	/* xact took a permanent log res */
  #define	XFS_TRANS_SYNC		0x08	/* make commit synchronous */
  #define XFS_TRANS_DQ_DIRTY	0x10	/* at least one dquot in trx dirty */
  #define XFS_TRANS_RESERVE	0x20    /* OK to use reserved data blocks */
  
  /*
   * Values for call flags parameter.
   */

  #define	XFS_TRANS_RELEASE_LOG_RES	0x4
  #define	XFS_TRANS_ABORT			0x8
  
  /*
   * Field values for xfs_trans_mod_sb.
   */
  #define	XFS_TRANS_SB_ICOUNT		0x00000001
  #define	XFS_TRANS_SB_IFREE		0x00000002
  #define	XFS_TRANS_SB_FDBLOCKS		0x00000004
  #define	XFS_TRANS_SB_RES_FDBLOCKS	0x00000008
  #define	XFS_TRANS_SB_FREXTENTS		0x00000010
  #define	XFS_TRANS_SB_RES_FREXTENTS	0x00000020
  #define	XFS_TRANS_SB_DBLOCKS		0x00000040
  #define	XFS_TRANS_SB_AGCOUNT		0x00000080
  #define	XFS_TRANS_SB_IMAXPCT		0x00000100
  #define	XFS_TRANS_SB_REXTSIZE		0x00000200
  #define	XFS_TRANS_SB_RBMBLOCKS		0x00000400
  #define	XFS_TRANS_SB_RBLOCKS		0x00000800
  #define	XFS_TRANS_SB_REXTENTS		0x00001000
  #define	XFS_TRANS_SB_REXTSLOG		0x00002000
  
  
  /*

   * Per-extent log reservation for the allocation btree changes
   * involved in freeing or allocating an extent.
   * 2 trees * (2 blocks/level * max depth - 1) * block size
   */
  #define	XFS_ALLOCFREE_LOG_RES(mp,nx) \
  	((nx) * (2 * XFS_FSB_TO_B((mp), 2 * XFS_AG_MAXLEVELS(mp) - 1)))
  #define	XFS_ALLOCFREE_LOG_COUNT(mp,nx) \
  	((nx) * (2 * (2 * XFS_AG_MAXLEVELS(mp) - 1)))
  
  /*
   * 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)

  
  #define	XFS_WRITE_LOG_RES(mp)	((mp)->m_reservations.tr_write)

  #define	XFS_ITRUNCATE_LOG_RES(mp)   ((mp)->m_reservations.tr_itruncate)

  #define	XFS_RENAME_LOG_RES(mp)	((mp)->m_reservations.tr_rename)

  #define	XFS_LINK_LOG_RES(mp)	((mp)->m_reservations.tr_link)

  #define	XFS_REMOVE_LOG_RES(mp)	((mp)->m_reservations.tr_remove)

  #define	XFS_SYMLINK_LOG_RES(mp)	((mp)->m_reservations.tr_symlink)

  #define	XFS_CREATE_LOG_RES(mp)	((mp)->m_reservations.tr_create)

  #define	XFS_MKDIR_LOG_RES(mp)	((mp)->m_reservations.tr_mkdir)

  #define	XFS_IFREE_LOG_RES(mp)	((mp)->m_reservations.tr_ifree)

  #define	XFS_ICHANGE_LOG_RES(mp)	((mp)->m_reservations.tr_ichange)

  #define	XFS_GROWDATA_LOG_RES(mp)    ((mp)->m_reservations.tr_growdata)

  #define	XFS_GROWRTALLOC_LOG_RES(mp)	((mp)->m_reservations.tr_growrtalloc)

  #define	XFS_GROWRTZERO_LOG_RES(mp)	((mp)->m_reservations.tr_growrtzero)

  #define	XFS_GROWRTFREE_LOG_RES(mp)	((mp)->m_reservations.tr_growrtfree)

  #define	XFS_SWRITE_LOG_RES(mp)	((mp)->m_reservations.tr_swrite)

  /*
   * Logging the inode timestamps on an fsync -- same as SWRITE
   * as long as SWRITE logs the entire inode core
   */
  #define XFS_FSYNC_TS_LOG_RES(mp)        ((mp)->m_reservations.tr_swrite)

  #define	XFS_WRITEID_LOG_RES(mp)	((mp)->m_reservations.tr_swrite)

  #define	XFS_ADDAFORK_LOG_RES(mp)	((mp)->m_reservations.tr_addafork)

  #define	XFS_ATTRINVAL_LOG_RES(mp)	((mp)->m_reservations.tr_attrinval)

  #define	XFS_ATTRSET_LOG_RES(mp, ext)	\
  	((mp)->m_reservations.tr_attrset + \
  	 (ext * (mp)->m_sb.sb_sectsize) + \
  	 (ext * XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK))) + \
  	 (128 * (ext + (ext * XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))))

  #define	XFS_ATTRRM_LOG_RES(mp)	((mp)->m_reservations.tr_attrrm)

  #define	XFS_CLEAR_AGI_BUCKET_LOG_RES(mp)  ((mp)->m_reservations.tr_clearagi)
  
  
  /*
   * 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_INACTIVE_LOG_COUNT		2
  #define	XFS_CREATE_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_ADDAFORK_LOG_COUNT		2
  #define	XFS_ATTRINVAL_LOG_COUNT		1
  #define	XFS_ATTRSET_LOG_COUNT		3
  #define	XFS_ATTRRM_LOG_COUNT		3
  
  /*
   * Here we centralize the specification of XFS meta-data buffer
   * reference count values.  This determine how hard the buffer
   * cache tries to hold onto the buffer.
   */
  #define	XFS_AGF_REF		4
  #define	XFS_AGI_REF		4
  #define	XFS_AGFL_REF		3
  #define	XFS_INO_BTREE_REF	3
  #define	XFS_ALLOC_BTREE_REF	2
  #define	XFS_BMAP_BTREE_REF	2
  #define	XFS_DIR_BTREE_REF	2

  #define	XFS_INO_REF		2

  #define	XFS_ATTR_BTREE_REF	1

  #define	XFS_DQUOT_REF		1
  
  #ifdef __KERNEL__

  
  struct xfs_buf;
  struct xfs_buftarg;
  struct xfs_efd_log_item;
  struct xfs_efi_log_item;
  struct xfs_inode;
  struct xfs_item_ops;
  struct xfs_log_iovec;
  struct xfs_log_item_desc;
  struct xfs_mount;
  struct xfs_trans;
  struct xfs_dquot_acct;

  struct xfs_busy_extent;

  
  typedef struct xfs_log_item {
  	struct list_head		li_ail;		/* AIL pointers */
  	xfs_lsn_t			li_lsn;		/* last on-disk lsn */
  	struct xfs_log_item_desc	*li_desc;	/* ptr to current desc*/
  	struct xfs_mount		*li_mountp;	/* ptr to fs mount */

  	struct xfs_ail			*li_ailp;	/* ptr to AIL */

  	uint				li_type;	/* item type */
  	uint				li_flags;	/* misc flags */
  	struct xfs_log_item		*li_bio_list;	/* buffer item list */
  	void				(*li_cb)(struct xfs_buf *,
  						 struct xfs_log_item *);
  							/* buffer item iodone */
  							/* callback func */

  	const struct xfs_item_ops	*li_ops;	/* function list */

  
  	/* delayed logging */
  	struct list_head		li_cil;		/* CIL pointers */
  	struct xfs_log_vec		*li_lv;		/* active log vector */

  	xfs_lsn_t			li_seq;		/* CIL commit seq */

  } xfs_log_item_t;
  
  #define	XFS_LI_IN_AIL	0x1
  #define XFS_LI_ABORTED	0x2

  #define XFS_LI_FLAGS \
  	{ XFS_LI_IN_AIL,	"IN_AIL" }, \
  	{ XFS_LI_ABORTED,	"ABORTED" }

  struct xfs_item_ops {

  	uint (*iop_size)(xfs_log_item_t *);
  	void (*iop_format)(xfs_log_item_t *, struct xfs_log_iovec *);
  	void (*iop_pin)(xfs_log_item_t *);

  	void (*iop_unpin)(xfs_log_item_t *, int remove);

  	uint (*iop_trylock)(xfs_log_item_t *);
  	void (*iop_unlock)(xfs_log_item_t *);
  	xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
  	void (*iop_push)(xfs_log_item_t *);

  	bool (*iop_pushbuf)(xfs_log_item_t *);

  	void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);

  };

  
  #define IOP_SIZE(ip)		(*(ip)->li_ops->iop_size)(ip)
  #define IOP_FORMAT(ip,vp)	(*(ip)->li_ops->iop_format)(ip, vp)
  #define IOP_PIN(ip)		(*(ip)->li_ops->iop_pin)(ip)

  #define IOP_UNPIN(ip, remove)	(*(ip)->li_ops->iop_unpin)(ip, remove)

  #define IOP_TRYLOCK(ip)		(*(ip)->li_ops->iop_trylock)(ip)
  #define IOP_UNLOCK(ip)		(*(ip)->li_ops->iop_unlock)(ip)
  #define IOP_COMMITTED(ip, lsn)	(*(ip)->li_ops->iop_committed)(ip, lsn)
  #define IOP_PUSH(ip)		(*(ip)->li_ops->iop_push)(ip)
  #define IOP_PUSHBUF(ip)		(*(ip)->li_ops->iop_pushbuf)(ip)
  #define IOP_COMMITTING(ip, lsn) (*(ip)->li_ops->iop_committing)(ip, lsn)
  
  /*
   * Return values for the IOP_TRYLOCK() routines.
   */
  #define	XFS_ITEM_SUCCESS	0
  #define	XFS_ITEM_PINNED		1
  #define	XFS_ITEM_LOCKED		2

  #define XFS_ITEM_PUSHBUF	3

  
  /*

   * This is the type of function which can be given to xfs_trans_callback()
   * to be called upon the transaction's commit to disk.
   */
  typedef void (*xfs_trans_callback_t)(struct xfs_trans *, void *);
  
  /*
   * This is the structure maintained for every active transaction.
   */
  typedef struct xfs_trans {
  	unsigned int		t_magic;	/* magic number */
  	xfs_log_callback_t	t_logcb;	/* log callback struct */
  	unsigned int		t_type;		/* transaction type */
  	unsigned int		t_log_res;	/* amt of log space resvd */
  	unsigned int		t_log_count;	/* count for perm log res */
  	unsigned int		t_blk_res;	/* # of blocks resvd */
  	unsigned int		t_blk_res_used;	/* # of resvd blocks used */
  	unsigned int		t_rtx_res;	/* # of rt extents resvd */
  	unsigned int		t_rtx_res_used;	/* # of resvd rt extents used */

  	struct xlog_ticket	*t_ticket;	/* log mgr ticket */

  	xfs_lsn_t		t_lsn;		/* log seq num of start of
  						 * transaction. */
  	xfs_lsn_t		t_commit_lsn;	/* log seq num of end of
  						 * transaction. */
  	struct xfs_mount	*t_mountp;	/* ptr to fs mount struct */
  	struct xfs_dquot_acct   *t_dqinfo;	/* acctg info for dquots */

  	unsigned int		t_flags;	/* misc flags */
  	int64_t			t_icount_delta;	/* superblock icount change */
  	int64_t			t_ifree_delta;	/* superblock ifree change */
  	int64_t			t_fdblocks_delta; /* superblock fdblocks chg */
  	int64_t			t_res_fdblocks_delta; /* on-disk only chg */
  	int64_t			t_frextents_delta;/* superblock freextents chg*/
  	int64_t			t_res_frextents_delta; /* on-disk only chg */
  #ifdef DEBUG
  	int64_t			t_ag_freeblks_delta; /* debugging counter */
  	int64_t			t_ag_flist_delta; /* debugging counter */
  	int64_t			t_ag_btree_delta; /* debugging counter */
  #endif
  	int64_t			t_dblocks_delta;/* superblock dblocks change */
  	int64_t			t_agcount_delta;/* superblock agcount change */
  	int64_t			t_imaxpct_delta;/* superblock imaxpct change */
  	int64_t			t_rextsize_delta;/* superblock rextsize chg */
  	int64_t			t_rbmblocks_delta;/* superblock rbmblocks chg */
  	int64_t			t_rblocks_delta;/* superblock rblocks change */
  	int64_t			t_rextents_delta;/* superblocks rextents chg */
  	int64_t			t_rextslog_delta;/* superblocks rextslog chg */

  	struct list_head	t_items;	/* log item descriptors */

  	xfs_trans_header_t	t_header;	/* header for in-log trans */

  	struct list_head	t_busy;		/* list of busy extents */

  	unsigned long		t_pflags;	/* saved process flags state */
  } xfs_trans_t;

  /*
   * XFS transaction mechanism exported interfaces that are
   * actually macros.
   */
  #define	xfs_trans_get_log_res(tp)	((tp)->t_log_res)
  #define	xfs_trans_get_log_count(tp)	((tp)->t_log_count)
  #define	xfs_trans_get_block_res(tp)	((tp)->t_blk_res)
  #define	xfs_trans_set_sync(tp)		((tp)->t_flags |= XFS_TRANS_SYNC)
  
  #ifdef DEBUG

  #define	xfs_trans_agblocks_delta(tp, d)	((tp)->t_ag_freeblks_delta += (int64_t)d)
  #define	xfs_trans_agflist_delta(tp, d)	((tp)->t_ag_flist_delta += (int64_t)d)
  #define	xfs_trans_agbtree_delta(tp, d)	((tp)->t_ag_btree_delta += (int64_t)d)

  #else
  #define	xfs_trans_agblocks_delta(tp, d)
  #define	xfs_trans_agflist_delta(tp, d)
  #define	xfs_trans_agbtree_delta(tp, d)
  #endif
  
  /*
   * XFS transaction mechanism exported interfaces.
   */

  xfs_trans_t	*xfs_trans_alloc(struct xfs_mount *, uint);

  xfs_trans_t	*_xfs_trans_alloc(struct xfs_mount *, uint, uint);

  xfs_trans_t	*xfs_trans_dup(xfs_trans_t *);
  int		xfs_trans_reserve(xfs_trans_t *, uint, uint, uint,
  				  uint, uint);

  void		xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);

  struct xfs_buf	*xfs_trans_get_buf(xfs_trans_t *, struct xfs_buftarg *, xfs_daddr_t,
  				   int, uint);
  int		xfs_trans_read_buf(struct xfs_mount *, xfs_trans_t *,
  				   struct xfs_buftarg *, xfs_daddr_t, int, uint,
  				   struct xfs_buf **);
  struct xfs_buf	*xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
  
  void		xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
  void		xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
  void		xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);

  void		xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);

  void		xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
  void		xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);

  void		xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
  void		xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
  void		xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);

  void		xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);

  void		xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);

  void		xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
  void		xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
  struct xfs_efi_log_item	*xfs_trans_get_efi(xfs_trans_t *, uint);
  void		xfs_efi_release(struct xfs_efi_log_item *, uint);
  void		xfs_trans_log_efi_extent(xfs_trans_t *,
  					 struct xfs_efi_log_item *,
  					 xfs_fsblock_t,
  					 xfs_extlen_t);
  struct xfs_efd_log_item	*xfs_trans_get_efd(xfs_trans_t *,
  				  struct xfs_efi_log_item *,
  				  uint);
  void		xfs_trans_log_efd_extent(xfs_trans_t *,
  					 struct xfs_efd_log_item *,
  					 xfs_fsblock_t,
  					 xfs_extlen_t);

  int		xfs_trans_commit(xfs_trans_t *, uint flags);

  void		xfs_trans_cancel(xfs_trans_t *, int);

  int		xfs_trans_ail_init(struct xfs_mount *);
  void		xfs_trans_ail_destroy(struct xfs_mount *);

  extern kmem_zone_t	*xfs_trans_zone;

  extern kmem_zone_t	*xfs_log_item_desc_zone;

  #endif	/* __KERNEL__ */

  void		xfs_trans_init(struct xfs_mount *);
  int		xfs_trans_roll(struct xfs_trans **, struct xfs_inode *);

  #endif	/* __XFS_TRANS_H__ */