fs/xfs/xfs_trans.h - third_party/linux - Git at Google

 /*
  * 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__

 /* kernel only transaction subsystem defines */

 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_trans_res;
 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 {
 	void (*iop_size)(xfs_log_item_t *, int *, int *);
 	void (*iop_format)(xfs_log_item_t *, struct xfs_log_vec *);
 	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);
 };

 void	xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
 			  int type, const struct xfs_item_ops *ops);

 /*
  * 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 structure maintained for every active transaction.
  */
 typedef struct xfs_trans {
 	unsigned int		t_magic;	/* magic number */
 	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 */
 	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_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);
 int		xfs_trans_reserve(struct xfs_trans *, struct xfs_trans_res *,
 				  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_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);
 int		xfs_trans_free_extent(struct xfs_trans *,
 				      struct xfs_efd_log_item *, xfs_fsblock_t,
 				      xfs_extlen_t);
 int		xfs_trans_commit(struct xfs_trans *);
 int		__xfs_trans_roll(struct xfs_trans **, struct xfs_inode *, int *);
 int		xfs_trans_roll(struct xfs_trans **, struct xfs_inode *);
 void		xfs_trans_cancel(xfs_trans_t *);
 int		xfs_trans_ail_init(struct xfs_mount *);
 void		xfs_trans_ail_destroy(struct xfs_mount *);

 void		xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *,
 				       enum xfs_blft);
 void		xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
 					struct xfs_buf *src_bp);

 extern kmem_zone_t	*xfs_trans_zone;
 extern kmem_zone_t	*xfs_log_item_desc_zone;

 #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__

	/* kernel only transaction subsystem defines */

	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_trans_res;
	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 {
	void (iop_size)(xfs_log_item_t , int , int );
	void (iop_format)(xfs_log_item_t , struct xfs_log_vec *);
	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);
	};

	void xfs_log_item_init(struct xfs_mount mp, struct xfs_log_item item,
	int type, const struct xfs_item_ops *ops);

	/*
	* 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 structure maintained for every active transaction.
	*/
	typedef struct xfs_trans {
	unsigned int t_magic; /* magic number */
	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 */
	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_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);
	int xfs_trans_reserve(struct xfs_trans , struct xfs_trans_res ,
	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_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);
	int xfs_trans_free_extent(struct xfs_trans *,
	struct xfs_efd_log_item *, xfs_fsblock_t,
	xfs_extlen_t);
	int xfs_trans_commit(struct xfs_trans *);
	int __xfs_trans_roll(struct xfs_trans *, struct xfs_inode , int *);
	int xfs_trans_roll(struct xfs_trans *, struct xfs_inode );
	void xfs_trans_cancel(xfs_trans_t *);
	int xfs_trans_ail_init(struct xfs_mount *);
	void xfs_trans_ail_destroy(struct xfs_mount *);

	void xfs_trans_buf_set_type(struct xfs_trans , struct xfs_buf ,
	enum xfs_blft);
	void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
	struct xfs_buf *src_bp);

	extern kmem_zone_t *xfs_trans_zone;
	extern kmem_zone_t *xfs_log_item_desc_zone;

	#endif /* __XFS_TRANS_H__ */