[linux-2.6-block.git] / fs / xfs / xfs_trans.h

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#ifndef	__XFS_TRANS_H__
#define	__XFS_TRANS_H__

/* kernel only transaction subsystem defines */

struct xlog;
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_mount;
struct xfs_trans;
struct xfs_trans_res;
struct xfs_dquot_acct;
struct xfs_rud_log_item;
struct xfs_rui_log_item;
struct xfs_btree_cur;
struct xfs_cui_log_item;
struct xfs_cud_log_item;
struct xfs_bui_log_item;
struct xfs_bud_log_item;

struct xfs_log_item {
	struct list_head		li_ail;		/* AIL pointers */
	struct list_head		li_trans;	/* transaction list */
	xfs_lsn_t			li_lsn;		/* last on-disk lsn */
	struct xlog			*li_log;
	struct xfs_ail			*li_ailp;	/* ptr to AIL */
	uint				li_type;	/* item type */
	unsigned long			li_flags;	/* misc flags */
	struct xfs_buf			*li_buf;	/* real buffer pointer */
	struct list_head		li_bio_list;	/* buffer item list */
	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 */
	struct xfs_log_vec		*li_lv_shadow;	/* standby vector */
	xfs_csn_t			li_seq;		/* CIL commit seq */
	uint32_t			li_order_id;	/* CIL commit order */
};

/*
 * li_flags use the (set/test/clear)_bit atomic interfaces because updates can
 * race with each other and we don't want to have to use the AIL lock to
 * serialise all updates.
 */
#define	XFS_LI_IN_AIL	0
#define	XFS_LI_ABORTED	1
#define	XFS_LI_FAILED	2
#define	XFS_LI_DIRTY	3
#define	XFS_LI_WHITEOUT	4
#define	XFS_LI_FLUSHING	5

#define XFS_LI_FLAGS \
	{ (1u << XFS_LI_IN_AIL),	"IN_AIL" }, \
	{ (1u << XFS_LI_ABORTED),	"ABORTED" }, \
	{ (1u << XFS_LI_FAILED),	"FAILED" }, \
	{ (1u << XFS_LI_DIRTY),		"DIRTY" }, \
	{ (1u << XFS_LI_WHITEOUT),	"WHITEOUT" }, \
	{ (1u << XFS_LI_FLUSHING),	"FLUSHING" }

struct xfs_item_ops {
	unsigned flags;
	void (*iop_size)(struct xfs_log_item *, int *, int *);
	void (*iop_format)(struct xfs_log_item *, struct xfs_log_vec *);
	void (*iop_pin)(struct xfs_log_item *);
	void (*iop_unpin)(struct xfs_log_item *, int remove);
	uint64_t (*iop_sort)(struct xfs_log_item *lip);
	int (*iop_precommit)(struct xfs_trans *tp, struct xfs_log_item *lip);
	void (*iop_committing)(struct xfs_log_item *lip, xfs_csn_t seq);
	xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t);
	uint (*iop_push)(struct xfs_log_item *, struct list_head *);
	void (*iop_release)(struct xfs_log_item *);
	bool (*iop_match)(struct xfs_log_item *item, uint64_t id);
	struct xfs_log_item *(*iop_intent)(struct xfs_log_item *intent_done);
};

/*
 * Log item ops flags
 */
/*
 * Release the log item when the journal commits instead of inserting into the
 * AIL for writeback tracking and/or log tail pinning.
 */
#define XFS_ITEM_RELEASE_WHEN_COMMITTED	(1 << 0)
#define XFS_ITEM_INTENT			(1 << 1)
#define XFS_ITEM_INTENT_DONE		(1 << 2)

static inline bool
xlog_item_is_intent(struct xfs_log_item *lip)
{
	return lip->li_ops->flags & XFS_ITEM_INTENT;
}

static inline bool
xlog_item_is_intent_done(struct xfs_log_item *lip)
{
	return lip->li_ops->flags & XFS_ITEM_INTENT_DONE;
}

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_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 */
	unsigned int		t_flags;	/* misc flags */
	xfs_agnumber_t		t_highest_agno;	/* highest AGF locked */
	struct xlog_ticket	*t_ticket;	/* log mgr ticket */
	struct xfs_mount	*t_mountp;	/* ptr to fs mount struct */
	struct xfs_dquot_acct   *t_dqinfo;	/* acctg info for dquots */
	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 */
	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 */
	int64_t			t_rgcount_delta; /* realtime group count */
	struct list_head	t_items;	/* log item descriptors */
	struct list_head	t_busy;		/* list of busy extents */
	struct list_head	t_dfops;	/* deferred operations */
	unsigned long		t_pflags;	/* saved process flags state */
} xfs_trans_t;

/*
 * XFS transaction mechanism exported interfaces that are
 * actually macros.
 */
#define	xfs_trans_set_sync(tp)		((tp)->t_flags |= XFS_TRANS_SYNC)

/*
 * XFS transaction mechanism exported interfaces.
 */
int		xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp,
			uint blocks, uint rtextents, uint flags,
			struct xfs_trans **tpp);
int		xfs_trans_reserve_more(struct xfs_trans *tp,
			unsigned int blocks, unsigned int rtextents);
int		xfs_trans_alloc_empty(struct xfs_mount *mp,
			struct xfs_trans **tpp);
void		xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);

int xfs_trans_get_buf_map(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_get_buf(
	struct xfs_trans	*tp,
	struct xfs_buftarg	*target,
	xfs_daddr_t		blkno,
	int			numblks,
	xfs_buf_flags_t		flags,
	struct xfs_buf		**bpp)
{
	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
	return xfs_trans_get_buf_map(tp, target, &map, 1, flags, bpp);
}

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(struct xfs_trans *);
struct xfs_buf	*xfs_trans_getrtsb(struct xfs_trans *tp);

void		xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
void		xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
void		xfs_trans_bdetach(struct xfs_trans *tp, struct xfs_buf *bp);
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 *);
bool		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_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
void		xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint,
				  uint);
void		xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *);
bool		xfs_trans_buf_is_dirty(struct xfs_buf *bp);
void		xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);

int		xfs_trans_commit(struct xfs_trans *);
int		xfs_trans_roll(struct xfs_trans **);
int		xfs_trans_roll_inode(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 struct kmem_cache	*xfs_trans_cache;

struct xfs_dquot;

int xfs_trans_alloc_inode(struct xfs_inode *ip, struct xfs_trans_res *resv,
		unsigned int dblocks, unsigned int rblocks, bool force,
		struct xfs_trans **tpp);
int xfs_trans_reserve_more_inode(struct xfs_trans *tp, struct xfs_inode *ip,
		unsigned int dblocks, unsigned int rblocks, bool force_quota);
int xfs_trans_alloc_icreate(struct xfs_mount *mp, struct xfs_trans_res *resv,
		struct xfs_dquot *udqp, struct xfs_dquot *gdqp,
		struct xfs_dquot *pdqp, unsigned int dblocks,
		struct xfs_trans **tpp);
int xfs_trans_alloc_ichange(struct xfs_inode *ip, struct xfs_dquot *udqp,
		struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, bool force,
		struct xfs_trans **tpp);
int xfs_trans_alloc_dir(struct xfs_inode *dp, struct xfs_trans_res *resv,
		struct xfs_inode *ip, unsigned int *dblocks,
		struct xfs_trans **tpp, int *nospace_error);

static inline void
xfs_trans_set_context(
	struct xfs_trans	*tp)
{
	tp->t_pflags = memalloc_nofs_save();
}

static inline void
xfs_trans_clear_context(
	struct xfs_trans	*tp)
{
	memalloc_nofs_restore(tp->t_pflags);
}

static inline void
xfs_trans_switch_context(
	struct xfs_trans	*old_tp,
	struct xfs_trans	*new_tp)
{
	new_tp->t_pflags = old_tp->t_pflags;
	old_tp->t_pflags = 0;
}

#endif	/* __XFS_TRANS_H__ */
Commit	Line	Data
	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
	4	* All Rights Reserved.
	5	*/
	6	#ifndef __XFS_TRANS_H__
	7	#define __XFS_TRANS_H__
	8
	9	/* kernel only transaction subsystem defines */
	10
	11	struct xlog;
	12	struct xfs_buf;
	13	struct xfs_buftarg;
	14	struct xfs_efd_log_item;
	15	struct xfs_efi_log_item;
	16	struct xfs_inode;
	17	struct xfs_item_ops;
	18	struct xfs_log_iovec;
	19	struct xfs_mount;
	20	struct xfs_trans;
	21	struct xfs_trans_res;
	22	struct xfs_dquot_acct;
	23	struct xfs_rud_log_item;
	24	struct xfs_rui_log_item;
	25	struct xfs_btree_cur;
	26	struct xfs_cui_log_item;
	27	struct xfs_cud_log_item;
	28	struct xfs_bui_log_item;
	29	struct xfs_bud_log_item;
	30
	31	struct xfs_log_item {
	32	struct list_head li_ail; /* AIL pointers */
	33	struct list_head li_trans; /* transaction list */
	34	xfs_lsn_t li_lsn; /* last on-disk lsn */
	35	struct xlog *li_log;
	36	struct xfs_ail li_ailp; / ptr to AIL */
	37	uint li_type; /* item type */
	38	unsigned long li_flags; /* misc flags */
	39	struct xfs_buf li_buf; / real buffer pointer */
	40	struct list_head li_bio_list; /* buffer item list */
	41	const struct xfs_item_ops li_ops; / function list */
	42
	43	/* delayed logging */
	44	struct list_head li_cil; /* CIL pointers */
	45	struct xfs_log_vec li_lv; / active log vector */
	46	struct xfs_log_vec li_lv_shadow; / standby vector */
	47	xfs_csn_t li_seq; /* CIL commit seq */
	48	uint32_t li_order_id; /* CIL commit order */
	49	};
	50
	51	/*
	52	* li_flags use the (set/test/clear)_bit atomic interfaces because updates can
	53	* race with each other and we don't want to have to use the AIL lock to
	54	* serialise all updates.
	55	*/
	56	#define XFS_LI_IN_AIL 0
	57	#define XFS_LI_ABORTED 1
	58	#define XFS_LI_FAILED 2
	59	#define XFS_LI_DIRTY 3
	60	#define XFS_LI_WHITEOUT 4
	61	#define XFS_LI_FLUSHING 5
	62
	63	#define XFS_LI_FLAGS \
	64	{ (1u << XFS_LI_IN_AIL), "IN_AIL" }, \
	65	{ (1u << XFS_LI_ABORTED), "ABORTED" }, \
	66	{ (1u << XFS_LI_FAILED), "FAILED" }, \
	67	{ (1u << XFS_LI_DIRTY), "DIRTY" }, \
	68	{ (1u << XFS_LI_WHITEOUT), "WHITEOUT" }, \
	69	{ (1u << XFS_LI_FLUSHING), "FLUSHING" }
	70
	71	struct xfs_item_ops {
	72	unsigned flags;
	73	void (iop_size)(struct xfs_log_item , int , int );
	74	void (iop_format)(struct xfs_log_item , struct xfs_log_vec *);
	75	void (iop_pin)(struct xfs_log_item );
	76	void (iop_unpin)(struct xfs_log_item , int remove);
	77	uint64_t (iop_sort)(struct xfs_log_item lip);
	78	int (iop_precommit)(struct xfs_trans tp, struct xfs_log_item *lip);
	79	void (iop_committing)(struct xfs_log_item lip, xfs_csn_t seq);
	80	xfs_lsn_t (iop_committed)(struct xfs_log_item , xfs_lsn_t);
	81	uint (iop_push)(struct xfs_log_item , struct list_head *);
	82	void (iop_release)(struct xfs_log_item );
	83	bool (iop_match)(struct xfs_log_item item, uint64_t id);
	84	struct xfs_log_item (iop_intent)(struct xfs_log_item *intent_done);
	85	};
	86
	87	/*
	88	* Log item ops flags
	89	*/
	90	/*
	91	* Release the log item when the journal commits instead of inserting into the
	92	* AIL for writeback tracking and/or log tail pinning.
	93	*/
	94	#define XFS_ITEM_RELEASE_WHEN_COMMITTED (1 << 0)
	95	#define XFS_ITEM_INTENT (1 << 1)
	96	#define XFS_ITEM_INTENT_DONE (1 << 2)
	97
	98	static inline bool
	99	xlog_item_is_intent(struct xfs_log_item *lip)
	100	{
	101	return lip->li_ops->flags & XFS_ITEM_INTENT;
	102	}
	103
	104	static inline bool
	105	xlog_item_is_intent_done(struct xfs_log_item *lip)
	106	{
	107	return lip->li_ops->flags & XFS_ITEM_INTENT_DONE;
	108	}
	109
	110	void xfs_log_item_init(struct xfs_mount mp, struct xfs_log_item item,
	111	int type, const struct xfs_item_ops *ops);
	112
	113	/*
	114	* Return values for the iop_push() routines.
	115	*/
	116	#define XFS_ITEM_SUCCESS 0
	117	#define XFS_ITEM_PINNED 1
	118	#define XFS_ITEM_LOCKED 2
	119	#define XFS_ITEM_FLUSHING 3
	120
	121	/*
	122	* This is the structure maintained for every active transaction.
	123	*/
	124	typedef struct xfs_trans {
	125	unsigned int t_log_res; /* amt of log space resvd */
	126	unsigned int t_log_count; /* count for perm log res */
	127	unsigned int t_blk_res; /* # of blocks resvd */
	128	unsigned int t_blk_res_used; /* # of resvd blocks used */
	129	unsigned int t_rtx_res; /* # of rt extents resvd */
	130	unsigned int t_rtx_res_used; /* # of resvd rt extents used */
	131	unsigned int t_flags; /* misc flags */
	132	xfs_agnumber_t t_highest_agno; /* highest AGF locked */
	133	struct xlog_ticket t_ticket; / log mgr ticket */
	134	struct xfs_mount t_mountp; / ptr to fs mount struct */
	135	struct xfs_dquot_acct t_dqinfo; / acctg info for dquots */
	136	int64_t t_icount_delta; /* superblock icount change */
	137	int64_t t_ifree_delta; /* superblock ifree change */
	138	int64_t t_fdblocks_delta; /* superblock fdblocks chg */
	139	int64_t t_res_fdblocks_delta; /* on-disk only chg */
	140	int64_t t_frextents_delta;/* superblock freextents chg*/
	141	int64_t t_res_frextents_delta; /* on-disk only chg */
	142	int64_t t_dblocks_delta;/* superblock dblocks change */
	143	int64_t t_agcount_delta;/* superblock agcount change */
	144	int64_t t_imaxpct_delta;/* superblock imaxpct change */
	145	int64_t t_rextsize_delta;/* superblock rextsize chg */
	146	int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */
	147	int64_t t_rblocks_delta;/* superblock rblocks change */
	148	int64_t t_rextents_delta;/* superblocks rextents chg */
	149	int64_t t_rextslog_delta;/* superblocks rextslog chg */
	150	int64_t t_rgcount_delta; /* realtime group count */
	151	struct list_head t_items; /* log item descriptors */
	152	struct list_head t_busy; /* list of busy extents */
	153	struct list_head t_dfops; /* deferred operations */
	154	unsigned long t_pflags; /* saved process flags state */
	155	} xfs_trans_t;
	156
	157	/*
	158	* XFS transaction mechanism exported interfaces that are
	159	* actually macros.
	160	*/
	161	#define xfs_trans_set_sync(tp) ((tp)->t_flags \|= XFS_TRANS_SYNC)
	162
	163	/*
	164	* XFS transaction mechanism exported interfaces.
	165	*/
	166	int xfs_trans_alloc(struct xfs_mount mp, struct xfs_trans_res resp,
	167	uint blocks, uint rtextents, uint flags,
	168	struct xfs_trans **tpp);
	169	int xfs_trans_reserve_more(struct xfs_trans *tp,
	170	unsigned int blocks, unsigned int rtextents);
	171	int xfs_trans_alloc_empty(struct xfs_mount *mp,
	172	struct xfs_trans **tpp);
	173	void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
	174
	175	int xfs_trans_get_buf_map(struct xfs_trans tp, struct xfs_buftarg target,
	176	struct xfs_buf_map *map, int nmaps, xfs_buf_flags_t flags,
	177	struct xfs_buf **bpp);
	178
	179	static inline int
	180	xfs_trans_get_buf(
	181	struct xfs_trans *tp,
	182	struct xfs_buftarg *target,
	183	xfs_daddr_t blkno,
	184	int numblks,
	185	xfs_buf_flags_t flags,
	186	struct xfs_buf **bpp)
	187	{
	188	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
	189	return xfs_trans_get_buf_map(tp, target, &map, 1, flags, bpp);
	190	}
	191
	192	int xfs_trans_read_buf_map(struct xfs_mount *mp,
	193	struct xfs_trans *tp,
	194	struct xfs_buftarg *target,
	195	struct xfs_buf_map *map, int nmaps,
	196	xfs_buf_flags_t flags,
	197	struct xfs_buf **bpp,
	198	const struct xfs_buf_ops *ops);
	199
	200	static inline int
	201	xfs_trans_read_buf(
	202	struct xfs_mount *mp,
	203	struct xfs_trans *tp,
	204	struct xfs_buftarg *target,
	205	xfs_daddr_t blkno,
	206	int numblks,
	207	xfs_buf_flags_t flags,
	208	struct xfs_buf **bpp,
	209	const struct xfs_buf_ops *ops)
	210	{
	211	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
	212	return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
	213	flags, bpp, ops);
	214	}
	215
	216	struct xfs_buf xfs_trans_getsb(struct xfs_trans );
	217	struct xfs_buf xfs_trans_getrtsb(struct xfs_trans tp);
	218
	219	void xfs_trans_brelse(xfs_trans_t , struct xfs_buf );
	220	void xfs_trans_bjoin(xfs_trans_t , struct xfs_buf );
	221	void xfs_trans_bdetach(struct xfs_trans tp, struct xfs_buf bp);
	222	void xfs_trans_bhold(xfs_trans_t , struct xfs_buf );
	223	void xfs_trans_bhold_release(xfs_trans_t , struct xfs_buf );
	224	void xfs_trans_binval(xfs_trans_t , struct xfs_buf );
	225	void xfs_trans_inode_buf(xfs_trans_t , struct xfs_buf );
	226	void xfs_trans_stale_inode_buf(xfs_trans_t , struct xfs_buf );
	227	bool xfs_trans_ordered_buf(xfs_trans_t , struct xfs_buf );
	228	void xfs_trans_dquot_buf(xfs_trans_t , struct xfs_buf , uint);
	229	void xfs_trans_inode_alloc_buf(xfs_trans_t , struct xfs_buf );
	230	void xfs_trans_ijoin(struct xfs_trans , struct xfs_inode , uint);
	231	void xfs_trans_log_buf(struct xfs_trans , struct xfs_buf , uint,
	232	uint);
	233	void xfs_trans_dirty_buf(struct xfs_trans , struct xfs_buf );
	234	bool xfs_trans_buf_is_dirty(struct xfs_buf *bp);
	235	void xfs_trans_log_inode(xfs_trans_t , struct xfs_inode , uint);
	236
	237	int xfs_trans_commit(struct xfs_trans *);
	238	int xfs_trans_roll(struct xfs_trans **);
	239	int xfs_trans_roll_inode(struct xfs_trans *, struct xfs_inode );
	240	void xfs_trans_cancel(xfs_trans_t *);
	241	int xfs_trans_ail_init(struct xfs_mount *);
	242	void xfs_trans_ail_destroy(struct xfs_mount *);
	243
	244	void xfs_trans_buf_set_type(struct xfs_trans , struct xfs_buf ,
	245	enum xfs_blft);
	246	void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
	247	struct xfs_buf *src_bp);
	248
	249	extern struct kmem_cache *xfs_trans_cache;
	250
	251	struct xfs_dquot;
	252
	253	int xfs_trans_alloc_inode(struct xfs_inode ip, struct xfs_trans_res resv,
	254	unsigned int dblocks, unsigned int rblocks, bool force,
	255	struct xfs_trans **tpp);
	256	int xfs_trans_reserve_more_inode(struct xfs_trans tp, struct xfs_inode ip,
	257	unsigned int dblocks, unsigned int rblocks, bool force_quota);
	258	int xfs_trans_alloc_icreate(struct xfs_mount mp, struct xfs_trans_res resv,
	259	struct xfs_dquot udqp, struct xfs_dquot gdqp,
	260	struct xfs_dquot *pdqp, unsigned int dblocks,
	261	struct xfs_trans **tpp);
	262	int xfs_trans_alloc_ichange(struct xfs_inode ip, struct xfs_dquot udqp,
	263	struct xfs_dquot gdqp, struct xfs_dquot pdqp, bool force,
	264	struct xfs_trans **tpp);
	265	int xfs_trans_alloc_dir(struct xfs_inode dp, struct xfs_trans_res resv,
	266	struct xfs_inode ip, unsigned int dblocks,
	267	struct xfs_trans *tpp, int nospace_error);
	268
	269	static inline void
	270	xfs_trans_set_context(
	271	struct xfs_trans *tp)
	272	{
	273	tp->t_pflags = memalloc_nofs_save();
	274	}
	275
	276	static inline void
	277	xfs_trans_clear_context(
	278	struct xfs_trans *tp)
	279	{
	280	memalloc_nofs_restore(tp->t_pflags);
	281	}
	282
	283	static inline void
	284	xfs_trans_switch_context(
	285	struct xfs_trans *old_tp,
	286	struct xfs_trans *new_tp)
	287	{
	288	new_tp->t_pflags = old_tp->t_pflags;
	289	old_tp->t_pflags = 0;
	290	}
	291
	292	#endif /* __XFS_TRANS_H__ */