[deliverable/linux.git] / fs / xfs / 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;

/*
 * Per-extent log reservation for the allocation btree changes
 * involved in freeing or allocating an extent.
 * 2 trees * (2 blocks/level * max depth - 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)
 * bmap btree: (levels + 2) * max depth
 * 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_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_ATTRSETM_LOG_RES(mp)	((mp)->m_reservations.tr_attrsetm)
#define XFS_ATTRSETRT_LOG_RES(mp)	((mp)->m_reservations.tr_attrsetrt)
#define	XFS_ATTRRM_LOG_RES(mp)		((mp)->m_reservations.tr_attrrm)
#define	XFS_CLEAR_AGI_BUCKET_LOG_RES(mp)  ((mp)->m_reservations.tr_clearagi)
#define XFS_QM_SBCHANGE_LOG_RES(mp)	((mp)->m_reservations.tr_qm_sbchange)
#define XFS_QM_SETQLIM_LOG_RES(mp)	((mp)->m_reservations.tr_qm_setqlim)
#define XFS_QM_DQALLOC_LOG_RES(mp)	((mp)->m_reservations.tr_qm_dqalloc)
#define XFS_QM_QUOTAOFF_LOG_RES(mp)	((mp)->m_reservations.tr_qm_quotaoff)
#define XFS_QM_QUOTAOFF_END_LOG_RES(mp)	((mp)->m_reservations.tr_qm_equotaoff)
#define XFS_SB_LOG_RES(mp)		((mp)->m_reservations.tr_sb)

/*
 * 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

#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 */
#if defined(DEBUG) || defined(XFS_WARN)
	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)

#if defined(DEBUG) || defined(XFS_WARN)
#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)
{
	DEFINE_SINGLE_BUF_MAP(map, blkno, 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,
				       const struct xfs_buf_ops *ops);

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,
	const struct xfs_buf_ops *ops)
{
	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
	return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
				      flags, bpp, ops);
}

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_ordered_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__ */
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
7b718769 NS	3	* All Rights Reserved.
1da177e4	4	*
7b718769 NS	5	* This program is free software; you can redistribute it and/or
7b718769 NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
7b718769 NS	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.
1da177e4	13	*
7b718769 NS	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
1da177e4 LT	17	*/
	18	#ifndef __XFS_TRANS_H__
	19	#define __XFS_TRANS_H__
	20
847fff5c BN	21	struct xfs_log_item;
847fff5c BN	22
1da177e4 LT	23	/*
	24	* Per-extent log reservation for the allocation btree changes
	25	* involved in freeing or allocating an extent.
2fb8b502	26	* 2 trees * (2 blocks/level * max depth - 1)
1da177e4	27	*/
1da177e4 LT	28	#define XFS_ALLOCFREE_LOG_COUNT(mp,nx) \
	29	((nx) * (2 * (2 * XFS_AG_MAXLEVELS(mp) - 1)))
	30
	31	/*
	32	* Per-directory log reservation for any directory change.
2fb8b502 JL	33	* dir blocks: (1 btree block per level + data block + free block)
2fb8b502 JL	34	* bmap btree: (levels + 2) * max depth
1da177e4 LT	35	* v2 directory blocks can be fragmented below the dirblksize down to the fsb
	36	* size, so account for that in the DAENTER macros.
	37	*/
1da177e4 LT	38	#define XFS_DIROP_LOG_COUNT(mp) \
	39	(XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK) + \
	40	XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)
	41
1da177e4 LT	42
1da177e4 LT	43	#define XFS_WRITE_LOG_RES(mp) ((mp)->m_reservations.tr_write)
1da177e4	44	#define XFS_ITRUNCATE_LOG_RES(mp) ((mp)->m_reservations.tr_itruncate)
1da177e4	45	#define XFS_RENAME_LOG_RES(mp) ((mp)->m_reservations.tr_rename)
1da177e4	46	#define XFS_LINK_LOG_RES(mp) ((mp)->m_reservations.tr_link)
1da177e4	47	#define XFS_REMOVE_LOG_RES(mp) ((mp)->m_reservations.tr_remove)
1da177e4	48	#define XFS_SYMLINK_LOG_RES(mp) ((mp)->m_reservations.tr_symlink)
1da177e4	49	#define XFS_CREATE_LOG_RES(mp) ((mp)->m_reservations.tr_create)
1da177e4	50	#define XFS_MKDIR_LOG_RES(mp) ((mp)->m_reservations.tr_mkdir)
1da177e4	51	#define XFS_IFREE_LOG_RES(mp) ((mp)->m_reservations.tr_ifree)
1da177e4	52	#define XFS_ICHANGE_LOG_RES(mp) ((mp)->m_reservations.tr_ichange)
1da177e4	53	#define XFS_GROWDATA_LOG_RES(mp) ((mp)->m_reservations.tr_growdata)
1da177e4	54	#define XFS_GROWRTALLOC_LOG_RES(mp) ((mp)->m_reservations.tr_growrtalloc)
1da177e4	55	#define XFS_GROWRTZERO_LOG_RES(mp) ((mp)->m_reservations.tr_growrtzero)
1da177e4	56	#define XFS_GROWRTFREE_LOG_RES(mp) ((mp)->m_reservations.tr_growrtfree)
1da177e4	57	#define XFS_SWRITE_LOG_RES(mp) ((mp)->m_reservations.tr_swrite)
1da177e4 LT	58	/*
	59	* Logging the inode timestamps on an fsync -- same as SWRITE
	60	* as long as SWRITE logs the entire inode core
	61	*/
	62	#define XFS_FSYNC_TS_LOG_RES(mp) ((mp)->m_reservations.tr_swrite)
a21cd503	63	#define XFS_WRITEID_LOG_RES(mp) ((mp)->m_reservations.tr_swrite)
1da177e4	64	#define XFS_ADDAFORK_LOG_RES(mp) ((mp)->m_reservations.tr_addafork)
1da177e4	65	#define XFS_ATTRINVAL_LOG_RES(mp) ((mp)->m_reservations.tr_attrinval)
a21cd503 JL	66	#define XFS_ATTRSETM_LOG_RES(mp) ((mp)->m_reservations.tr_attrsetm)
	67	#define XFS_ATTRSETRT_LOG_RES(mp) ((mp)->m_reservations.tr_attrsetrt)
	68	#define XFS_ATTRRM_LOG_RES(mp) ((mp)->m_reservations.tr_attrrm)
1da177e4	69	#define XFS_CLEAR_AGI_BUCKET_LOG_RES(mp) ((mp)->m_reservations.tr_clearagi)
b0c10b98	70	#define XFS_QM_SBCHANGE_LOG_RES(mp) ((mp)->m_reservations.tr_qm_sbchange)
f0f2df94	71	#define XFS_QM_SETQLIM_LOG_RES(mp) ((mp)->m_reservations.tr_qm_setqlim)
48001044	72	#define XFS_QM_DQALLOC_LOG_RES(mp) ((mp)->m_reservations.tr_qm_dqalloc)
a1bd9557	73	#define XFS_QM_QUOTAOFF_LOG_RES(mp) ((mp)->m_reservations.tr_qm_quotaoff)
762d7ba6	74	#define XFS_QM_QUOTAOFF_END_LOG_RES(mp) ((mp)->m_reservations.tr_qm_equotaoff)
a7bd794a	75	#define XFS_SB_LOG_RES(mp) ((mp)->m_reservations.tr_sb)
1da177e4 LT	76
	77	/*
	78	* Various log count values.
	79	*/
	80	#define XFS_DEFAULT_LOG_COUNT 1
	81	#define XFS_DEFAULT_PERM_LOG_COUNT 2
	82	#define XFS_ITRUNCATE_LOG_COUNT 2
	83	#define XFS_INACTIVE_LOG_COUNT 2
	84	#define XFS_CREATE_LOG_COUNT 2
	85	#define XFS_MKDIR_LOG_COUNT 3
	86	#define XFS_SYMLINK_LOG_COUNT 3
	87	#define XFS_REMOVE_LOG_COUNT 2
	88	#define XFS_LINK_LOG_COUNT 2
	89	#define XFS_RENAME_LOG_COUNT 2
	90	#define XFS_WRITE_LOG_COUNT 2
	91	#define XFS_ADDAFORK_LOG_COUNT 2
	92	#define XFS_ATTRINVAL_LOG_COUNT 1
	93	#define XFS_ATTRSET_LOG_COUNT 3
	94	#define XFS_ATTRRM_LOG_COUNT 3
	95
1da177e4	96	#ifdef __KERNEL__
847fff5c BN	97
	98	struct xfs_buf;
	99	struct xfs_buftarg;
	100	struct xfs_efd_log_item;
	101	struct xfs_efi_log_item;
	102	struct xfs_inode;
	103	struct xfs_item_ops;
	104	struct xfs_log_iovec;
	105	struct xfs_log_item_desc;
	106	struct xfs_mount;
	107	struct xfs_trans;
	108	struct xfs_dquot_acct;
ed3b4d6c	109	struct xfs_busy_extent;
847fff5c BN	110
	111	typedef struct xfs_log_item {
	112	struct list_head li_ail; /* AIL pointers */
	113	xfs_lsn_t li_lsn; /* last on-disk lsn */
	114	struct xfs_log_item_desc li_desc; / ptr to current desc*/
	115	struct xfs_mount li_mountp; / ptr to fs mount */
fc1829f3	116	struct xfs_ail li_ailp; / ptr to AIL */
847fff5c BN	117	uint li_type; /* item type */
	118	uint li_flags; /* misc flags */
	119	struct xfs_log_item li_bio_list; / buffer item list */
	120	void (li_cb)(struct xfs_buf ,
	121	struct xfs_log_item *);
	122	/* buffer item iodone */
	123	/* callback func */
272e42b2	124	const struct xfs_item_ops li_ops; / function list */
71e330b5 DC	125
	126	/* delayed logging */
	127	struct list_head li_cil; /* CIL pointers */
	128	struct xfs_log_vec li_lv; / active log vector */
ccf7c23f	129	xfs_lsn_t li_seq; /* CIL commit seq */
847fff5c BN	130	} xfs_log_item_t;
	131
	132	#define XFS_LI_IN_AIL 0x1
	133	#define XFS_LI_ABORTED 0x2
	134
0b1b213f CH	135	#define XFS_LI_FLAGS \
	136	{ XFS_LI_IN_AIL, "IN_AIL" }, \
	137	{ XFS_LI_ABORTED, "ABORTED" }
	138
272e42b2	139	struct xfs_item_ops {
847fff5c BN	140	uint (iop_size)(xfs_log_item_t );
	141	void (iop_format)(xfs_log_item_t , struct xfs_log_iovec *);
	142	void (iop_pin)(xfs_log_item_t );
9412e318	143	void (iop_unpin)(xfs_log_item_t , int remove);
43ff2122	144	uint (iop_push)(struct xfs_log_item , struct list_head *);
847fff5c BN	145	void (iop_unlock)(xfs_log_item_t );
847fff5c BN	146	xfs_lsn_t (iop_committed)(xfs_log_item_t , xfs_lsn_t);
847fff5c	147	void (iop_committing)(xfs_log_item_t , xfs_lsn_t);
272e42b2	148	};
847fff5c BN	149
	150	#define IOP_SIZE(ip) (*(ip)->li_ops->iop_size)(ip)
	151	#define IOP_FORMAT(ip,vp) (*(ip)->li_ops->iop_format)(ip, vp)
	152	#define IOP_PIN(ip) (*(ip)->li_ops->iop_pin)(ip)
9412e318	153	#define IOP_UNPIN(ip, remove) (*(ip)->li_ops->iop_unpin)(ip, remove)
43ff2122	154	#define IOP_PUSH(ip, list) (*(ip)->li_ops->iop_push)(ip, list)
847fff5c BN	155	#define IOP_UNLOCK(ip) (*(ip)->li_ops->iop_unlock)(ip)
847fff5c BN	156	#define IOP_COMMITTED(ip, lsn) (*(ip)->li_ops->iop_committed)(ip, lsn)
847fff5c BN	157	#define IOP_COMMITTING(ip, lsn) (*(ip)->li_ops->iop_committing)(ip, lsn)
	158
	159	/*
43ff2122	160	* Return values for the IOP_PUSH() routines.
847fff5c	161	*/
43ff2122 CH	162	#define XFS_ITEM_SUCCESS 0
	163	#define XFS_ITEM_PINNED 1
	164	#define XFS_ITEM_LOCKED 2
	165	#define XFS_ITEM_FLUSHING 3
847fff5c	166
847fff5c BN	167	/*
	168	* This is the type of function which can be given to xfs_trans_callback()
	169	* to be called upon the transaction's commit to disk.
	170	*/
	171	typedef void (xfs_trans_callback_t)(struct xfs_trans , void *);
	172
	173	/*
	174	* This is the structure maintained for every active transaction.
	175	*/
	176	typedef struct xfs_trans {
	177	unsigned int t_magic; /* magic number */
	178	xfs_log_callback_t t_logcb; /* log callback struct */
	179	unsigned int t_type; /* transaction type */
	180	unsigned int t_log_res; /* amt of log space resvd */
	181	unsigned int t_log_count; /* count for perm log res */
	182	unsigned int t_blk_res; /* # of blocks resvd */
	183	unsigned int t_blk_res_used; /* # of resvd blocks used */
	184	unsigned int t_rtx_res; /* # of rt extents resvd */
	185	unsigned int t_rtx_res_used; /* # of resvd rt extents used */
35a8a72f	186	struct xlog_ticket t_ticket; / log mgr ticket */
847fff5c BN	187	xfs_lsn_t t_lsn; /* log seq num of start of
	188	* transaction. */
	189	xfs_lsn_t t_commit_lsn; /* log seq num of end of
	190	* transaction. */
	191	struct xfs_mount t_mountp; / ptr to fs mount struct */
	192	struct xfs_dquot_acct t_dqinfo; / acctg info for dquots */
847fff5c BN	193	unsigned int t_flags; /* misc flags */
	194	int64_t t_icount_delta; /* superblock icount change */
	195	int64_t t_ifree_delta; /* superblock ifree change */
	196	int64_t t_fdblocks_delta; /* superblock fdblocks chg */
	197	int64_t t_res_fdblocks_delta; /* on-disk only chg */
	198	int64_t t_frextents_delta;/* superblock freextents chg*/
	199	int64_t t_res_frextents_delta; /* on-disk only chg */
742ae1e3	200	#if defined(DEBUG) \|\| defined(XFS_WARN)
847fff5c BN	201	int64_t t_ag_freeblks_delta; /* debugging counter */
	202	int64_t t_ag_flist_delta; /* debugging counter */
	203	int64_t t_ag_btree_delta; /* debugging counter */
	204	#endif
	205	int64_t t_dblocks_delta;/* superblock dblocks change */
	206	int64_t t_agcount_delta;/* superblock agcount change */
	207	int64_t t_imaxpct_delta;/* superblock imaxpct change */
	208	int64_t t_rextsize_delta;/* superblock rextsize chg */
	209	int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */
	210	int64_t t_rblocks_delta;/* superblock rblocks change */
	211	int64_t t_rextents_delta;/* superblocks rextents chg */
	212	int64_t t_rextslog_delta;/* superblocks rextslog chg */
e98c414f	213	struct list_head t_items; /* log item descriptors */
847fff5c	214	xfs_trans_header_t t_header; /* header for in-log trans */
ed3b4d6c	215	struct list_head t_busy; /* list of busy extents */
847fff5c BN	216	unsigned long t_pflags; /* saved process flags state */
	217	} xfs_trans_t;
	218
1da177e4 LT	219	/*
	220	* XFS transaction mechanism exported interfaces that are
	221	* actually macros.
	222	*/
	223	#define xfs_trans_get_log_res(tp) ((tp)->t_log_res)
	224	#define xfs_trans_get_log_count(tp) ((tp)->t_log_count)
	225	#define xfs_trans_get_block_res(tp) ((tp)->t_blk_res)
	226	#define xfs_trans_set_sync(tp) ((tp)->t_flags \|= XFS_TRANS_SYNC)
	227
742ae1e3	228	#if defined(DEBUG) \|\| defined(XFS_WARN)
20f4ebf2 DC	229	#define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d)
	230	#define xfs_trans_agflist_delta(tp, d) ((tp)->t_ag_flist_delta += (int64_t)d)
	231	#define xfs_trans_agbtree_delta(tp, d) ((tp)->t_ag_btree_delta += (int64_t)d)
1da177e4 LT	232	#else
	233	#define xfs_trans_agblocks_delta(tp, d)
	234	#define xfs_trans_agflist_delta(tp, d)
	235	#define xfs_trans_agbtree_delta(tp, d)
	236	#endif
	237
	238	/*
	239	* XFS transaction mechanism exported interfaces.
	240	*/
1da177e4	241	xfs_trans_t xfs_trans_alloc(struct xfs_mount , uint);
77ba7877	242	xfs_trans_t _xfs_trans_alloc(struct xfs_mount , uint, xfs_km_flags_t);
1da177e4 LT	243	xfs_trans_t xfs_trans_dup(xfs_trans_t );
	244	int xfs_trans_reserve(xfs_trans_t *, uint, uint, uint,
	245	uint, uint);
20f4ebf2	246	void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
de2a4f59 DC	247
	248	struct xfs_buf xfs_trans_get_buf_map(struct xfs_trans tp,
	249	struct xfs_buftarg *target,
	250	struct xfs_buf_map *map, int nmaps,
	251	uint flags);
	252
	253	static inline struct xfs_buf *
	254	xfs_trans_get_buf(
	255	struct xfs_trans *tp,
	256	struct xfs_buftarg *target,
	257	xfs_daddr_t blkno,
	258	int numblks,
	259	uint flags)
	260	{
c3f8fc73	261	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
de2a4f59 DC	262	return xfs_trans_get_buf_map(tp, target, &map, 1, flags);
	263	}
	264
	265	int xfs_trans_read_buf_map(struct xfs_mount *mp,
	266	struct xfs_trans *tp,
	267	struct xfs_buftarg *target,
	268	struct xfs_buf_map *map, int nmaps,
	269	xfs_buf_flags_t flags,
c3f8fc73	270	struct xfs_buf **bpp,
1813dd64	271	const struct xfs_buf_ops *ops);
de2a4f59 DC	272
	273	static inline int
	274	xfs_trans_read_buf(
	275	struct xfs_mount *mp,
	276	struct xfs_trans *tp,
	277	struct xfs_buftarg *target,
	278	xfs_daddr_t blkno,
	279	int numblks,
	280	xfs_buf_flags_t flags,
c3f8fc73	281	struct xfs_buf **bpp,
1813dd64	282	const struct xfs_buf_ops *ops)
de2a4f59	283	{
c3f8fc73 DC	284	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
c3f8fc73 DC	285	return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
1813dd64	286	flags, bpp, ops);
de2a4f59 DC	287	}
de2a4f59 DC	288
1da177e4 LT	289	struct xfs_buf xfs_trans_getsb(xfs_trans_t , struct xfs_mount *, int);
	290
	291	void xfs_trans_brelse(xfs_trans_t , struct xfs_buf );
	292	void xfs_trans_bjoin(xfs_trans_t , struct xfs_buf );
	293	void xfs_trans_bhold(xfs_trans_t , struct xfs_buf );
efa092f3	294	void xfs_trans_bhold_release(xfs_trans_t , struct xfs_buf );
1da177e4 LT	295	void xfs_trans_binval(xfs_trans_t , struct xfs_buf );
1da177e4 LT	296	void xfs_trans_inode_buf(xfs_trans_t , struct xfs_buf );
1da177e4	297	void xfs_trans_stale_inode_buf(xfs_trans_t , struct xfs_buf );
5f6bed76	298	void xfs_trans_ordered_buf(xfs_trans_t , struct xfs_buf );
1da177e4 LT	299	void xfs_trans_dquot_buf(xfs_trans_t , struct xfs_buf , uint);
1da177e4 LT	300	void xfs_trans_inode_alloc_buf(xfs_trans_t , struct xfs_buf );
dcd79a14	301	void xfs_trans_ichgtime(struct xfs_trans , struct xfs_inode , int);
ddc3415a	302	void xfs_trans_ijoin(struct xfs_trans , struct xfs_inode , uint);
1da177e4 LT	303	void xfs_trans_log_buf(xfs_trans_t , struct xfs_buf , uint, uint);
	304	void xfs_trans_log_inode(xfs_trans_t , struct xfs_inode , uint);
	305	struct xfs_efi_log_item xfs_trans_get_efi(xfs_trans_t , uint);
	306	void xfs_efi_release(struct xfs_efi_log_item *, uint);
	307	void xfs_trans_log_efi_extent(xfs_trans_t *,
	308	struct xfs_efi_log_item *,
	309	xfs_fsblock_t,
	310	xfs_extlen_t);
	311	struct xfs_efd_log_item xfs_trans_get_efd(xfs_trans_t ,
	312	struct xfs_efi_log_item *,
	313	uint);
	314	void xfs_trans_log_efd_extent(xfs_trans_t *,
	315	struct xfs_efd_log_item *,
	316	xfs_fsblock_t,
	317	xfs_extlen_t);
b1037058	318	int xfs_trans_commit(xfs_trans_t *, uint flags);
1da177e4	319	void xfs_trans_cancel(xfs_trans_t *, int);
249a8c11 DC	320	int xfs_trans_ail_init(struct xfs_mount *);
249a8c11 DC	321	void xfs_trans_ail_destroy(struct xfs_mount *);
1da177e4	322
a8272ce0	323	extern kmem_zone_t *xfs_trans_zone;
e98c414f	324	extern kmem_zone_t *xfs_log_item_desc_zone;
a8272ce0	325
1da177e4 LT	326	#endif /* __KERNEL__ */
1da177e4 LT	327
847fff5c BN	328	void xfs_trans_init(struct xfs_mount *);
	329	int xfs_trans_roll(struct xfs_trans *, struct xfs_inode );
	330
1da177e4	331	#endif /* __XFS_TRANS_H__ */