fs/xfs/xfs_trans.h - LeafOS-Devices/android_kernel_samsung_gta4xl - Gitiles

 /*
  * 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;
 	struct list_head	lid_trans;
 	unsigned char		lid_flags;
 };

 #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_push)(struct xfs_log_item *, struct list_head *);
 	void (*iop_unlock)(xfs_log_item_t *);
 	xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_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_PUSH(ip, list)	(*(ip)->li_ops->iop_push)(ip, list)
 #define IOP_UNLOCK(ip)		(*(ip)->li_ops->iop_unlock)(ip)
 #define IOP_COMMITTED(ip, lsn)	(*(ip)->li_ops->iop_committed)(ip, lsn)
 #define IOP_COMMITTING(ip, lsn) (*(ip)->li_ops->iop_committing)(ip, lsn)

 /*
  * Return values for the IOP_PUSH() routines.
  */
 #define XFS_ITEM_SUCCESS	0
 #define XFS_ITEM_PINNED		1
 #define XFS_ITEM_LOCKED		2
 #define XFS_ITEM_FLUSHING	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, xfs_km_flags_t);
 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_map(struct xfs_trans *tp,
 				       struct xfs_buftarg *target,
 				       struct xfs_buf_map *map, int nmaps,
 				       uint flags);

 static inline struct xfs_buf *
 xfs_trans_get_buf(
 	struct xfs_trans	*tp,
 	struct xfs_buftarg	*target,
 	xfs_daddr_t		blkno,
 	int			numblks,
 	uint			flags)
 {
 	struct xfs_buf_map	map = {
 		.bm_bn = blkno,
 		.bm_len = numblks,
 	};
 	return xfs_trans_get_buf_map(tp, target, &map, 1, flags);
 }

 int		xfs_trans_read_buf_map(struct xfs_mount *mp,
 				       struct xfs_trans *tp,
 				       struct xfs_buftarg *target,
 				       struct xfs_buf_map *map, int nmaps,
 				       xfs_buf_flags_t flags,
 				       struct xfs_buf **bpp);

 static inline int
 xfs_trans_read_buf(
 	struct xfs_mount	*mp,
 	struct xfs_trans	*tp,
 	struct xfs_buftarg	*target,
 	xfs_daddr_t		blkno,
 	int			numblks,
 	xfs_buf_flags_t		flags,
 	struct xfs_buf		**bpp)
 {
 	struct xfs_buf_map	map = {
 		.bm_bn = blkno,
 		.bm_len = numblks,
 	};
 	return xfs_trans_read_buf_map(mp, tp, target, &map, 1, flags, bpp);
 }

 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__ */
	/*
	* 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;
	struct list_head lid_trans;
	unsigned char lid_flags;
	};

	#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_push)(struct xfs_log_item , struct list_head *);
	void (iop_unlock)(xfs_log_item_t );
	xfs_lsn_t (iop_committed)(xfs_log_item_t , xfs_lsn_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_PUSH(ip, list) (*(ip)->li_ops->iop_push)(ip, list)
	#define IOP_UNLOCK(ip) (*(ip)->li_ops->iop_unlock)(ip)
	#define IOP_COMMITTED(ip, lsn) (*(ip)->li_ops->iop_committed)(ip, lsn)
	#define IOP_COMMITTING(ip, lsn) (*(ip)->li_ops->iop_committing)(ip, lsn)

	/*
	* Return values for the IOP_PUSH() routines.
	*/
	#define XFS_ITEM_SUCCESS 0
	#define XFS_ITEM_PINNED 1
	#define XFS_ITEM_LOCKED 2
	#define XFS_ITEM_FLUSHING 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, xfs_km_flags_t);
	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_map(struct xfs_trans tp,
	struct xfs_buftarg *target,
	struct xfs_buf_map *map, int nmaps,
	uint flags);

	static inline struct xfs_buf *
	xfs_trans_get_buf(
	struct xfs_trans *tp,
	struct xfs_buftarg *target,
	xfs_daddr_t blkno,
	int numblks,
	uint flags)
	{
	struct xfs_buf_map map = {
	.bm_bn = blkno,
	.bm_len = numblks,
	};
	return xfs_trans_get_buf_map(tp, target, &map, 1, flags);
	}

	int xfs_trans_read_buf_map(struct xfs_mount *mp,
	struct xfs_trans *tp,
	struct xfs_buftarg *target,
	struct xfs_buf_map *map, int nmaps,
	xfs_buf_flags_t flags,
	struct xfs_buf **bpp);

	static inline int
	xfs_trans_read_buf(
	struct xfs_mount *mp,
	struct xfs_trans *tp,
	struct xfs_buftarg *target,
	xfs_daddr_t blkno,
	int numblks,
	xfs_buf_flags_t flags,
	struct xfs_buf **bpp)
	{
	struct xfs_buf_map map = {
	.bm_bn = blkno,
	.bm_len = numblks,
	};
	return xfs_trans_read_buf_map(mp, tp, target, &map, 1, flags, bpp);
	}

	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__ */