[linux-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_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" }

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 *);
	int (*iop_recover)(struct xfs_log_item *lip,
			   struct list_head *capture_list);
	bool (*iop_match)(struct xfs_log_item *item, uint64_t id);
	struct xfs_log_item *(*iop_relog)(struct xfs_log_item *intent,
			struct xfs_trans *tp);
	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_magic;	/* magic number */
	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 */
	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_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 *);

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 *);
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_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
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;

static inline struct xfs_log_item *
xfs_trans_item_relog(
	struct xfs_log_item	*lip,
	struct xfs_trans	*tp)
{
	return lip->li_ops->iop_relog(lip, tp);
}

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_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)
{
	ASSERT(current->journal_info == NULL);
	tp->t_pflags = memalloc_nofs_save();
	current->journal_info = tp;
}

static inline void
xfs_trans_clear_context(
	struct xfs_trans	*tp)
{
	if (current->journal_info == tp) {
		memalloc_nofs_restore(tp->t_pflags);
		current->journal_info = NULL;
	}
}

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

#endif	/* __XFS_TRANS_H__ */
Commit	Line	Data
0b61f8a4	1	// SPDX-License-Identifier: GPL-2.0
1da177e4	2	/*
7b718769 NS	3	* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
7b718769 NS	4	* All Rights Reserved.
1da177e4 LT	5	*/
	6	#ifndef __XFS_TRANS_H__
	7	#define __XFS_TRANS_H__
	8
7fd36c44	9	/* kernel only transaction subsystem defines */
847fff5c	10
d86142dd	11	struct xlog;
847fff5c BN	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;
847fff5c BN	19	struct xfs_mount;
847fff5c BN	20	struct xfs_trans;
3d3c8b52	21	struct xfs_trans_res;
847fff5c	22	struct xfs_dquot_acct;
f8dbebef DW	23	struct xfs_rud_log_item;
f8dbebef DW	24	struct xfs_rui_log_item;
9c194644	25	struct xfs_btree_cur;
f997ee21	26	struct xfs_cui_log_item;
33ba6129	27	struct xfs_cud_log_item;
77d61fe4	28	struct xfs_bui_log_item;
9f3afb57	29	struct xfs_bud_log_item;
847fff5c	30
efe2330f	31	struct xfs_log_item {
847fff5c	32	struct list_head li_ail; /* AIL pointers */
e6631f85	33	struct list_head li_trans; /* transaction list */
847fff5c	34	xfs_lsn_t li_lsn; /* last on-disk lsn */
d86142dd	35	struct xlog *li_log;
fc1829f3	36	struct xfs_ail li_ailp; / ptr to AIL */
847fff5c	37	uint li_type; /* item type */
22525c17	38	unsigned long li_flags; /* misc flags */
d3a304b6	39	struct xfs_buf li_buf; / real buffer pointer */
643c8c05	40	struct list_head li_bio_list; /* buffer item list */
272e42b2	41	const struct xfs_item_ops li_ops; / function list */
71e330b5 DC	42
	43	/* delayed logging */
	44	struct list_head li_cil; /* CIL pointers */
	45	struct xfs_log_vec li_lv; / active log vector */
b1c5ebb2	46	struct xfs_log_vec li_lv_shadow; / standby vector */
5f9b4b0d	47	xfs_csn_t li_seq; /* CIL commit seq */
016a2338	48	uint32_t li_order_id; /* CIL commit order */
efe2330f	49	};
847fff5c	50
22525c17 DC	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
0d227466 DC	59	#define XFS_LI_DIRTY 3
0d227466 DC	60	#define XFS_LI_WHITEOUT 4
847fff5c	61
0b1b213f	62	#define XFS_LI_FLAGS \
22d53f48 DC	63	{ (1u << XFS_LI_IN_AIL), "IN_AIL" }, \
	64	{ (1u << XFS_LI_ABORTED), "ABORTED" }, \
	65	{ (1u << XFS_LI_FAILED), "FAILED" }, \
0d227466 DC	66	{ (1u << XFS_LI_DIRTY), "DIRTY" }, \
0d227466 DC	67	{ (1u << XFS_LI_WHITEOUT), "WHITEOUT" }
0b1b213f	68
272e42b2	69	struct xfs_item_ops {
9ce632a2	70	unsigned flags;
efe2330f CH	71	void (iop_size)(struct xfs_log_item , int , int );
	72	void (iop_format)(struct xfs_log_item , struct xfs_log_vec *);
	73	void (iop_pin)(struct xfs_log_item );
	74	void (iop_unpin)(struct xfs_log_item , int remove);
fad743d7 DC	75	uint64_t (iop_sort)(struct xfs_log_item lip);
fad743d7 DC	76	int (iop_precommit)(struct xfs_trans tp, struct xfs_log_item *lip);
5f9b4b0d	77	void (iop_committing)(struct xfs_log_item lip, xfs_csn_t seq);
efe2330f	78	xfs_lsn_t (iop_committed)(struct xfs_log_item , xfs_lsn_t);
fad743d7 DC	79	uint (iop_push)(struct xfs_log_item , struct list_head *);
fad743d7 DC	80	void (iop_release)(struct xfs_log_item );
e6fff81e DW	81	int (iop_recover)(struct xfs_log_item lip,
e6fff81e DW	82	struct list_head *capture_list);
154c733a	83	bool (iop_match)(struct xfs_log_item item, uint64_t id);
4e919af7 DW	84	struct xfs_log_item (iop_relog)(struct xfs_log_item *intent,
4e919af7 DW	85	struct xfs_trans *tp);
c23ab603	86	struct xfs_log_item (iop_intent)(struct xfs_log_item *intent_done);
272e42b2	87	};
847fff5c	88
f5b81200 DC	89	/*
	90	* Log item ops flags
	91	*/
	92	/*
	93	* Release the log item when the journal commits instead of inserting into the
	94	* AIL for writeback tracking and/or log tail pinning.
	95	*/
	96	#define XFS_ITEM_RELEASE_WHEN_COMMITTED (1 << 0)
	97	#define XFS_ITEM_INTENT (1 << 1)
	98	#define XFS_ITEM_INTENT_DONE (1 << 2)
	99
d6b8fc6c KX	100	static inline bool
	101	xlog_item_is_intent(struct xfs_log_item *lip)
	102	{
f5b81200	103	return lip->li_ops->flags & XFS_ITEM_INTENT;
d6b8fc6c KX	104	}
d6b8fc6c KX	105
d6b8fc6c KX	106	static inline bool
	107	xlog_item_is_intent_done(struct xfs_log_item *lip)
	108	{
f5b81200	109	return lip->li_ops->flags & XFS_ITEM_INTENT_DONE;
d6b8fc6c KX	110	}
d6b8fc6c KX	111
239880ef DC	112	void xfs_log_item_init(struct xfs_mount mp, struct xfs_log_item item,
	113	int type, const struct xfs_item_ops *ops);
	114
847fff5c	115	/*
904c17e6	116	* Return values for the iop_push() routines.
847fff5c	117	*/
43ff2122 CH	118	#define XFS_ITEM_SUCCESS 0
	119	#define XFS_ITEM_PINNED 1
	120	#define XFS_ITEM_LOCKED 2
	121	#define XFS_ITEM_FLUSHING 3
847fff5c	122
847fff5c BN	123	/*
	124	* This is the structure maintained for every active transaction.
	125	*/
	126	typedef struct xfs_trans {
	127	unsigned int t_magic; /* magic number */
847fff5c BN	128	unsigned int t_log_res; /* amt of log space resvd */
	129	unsigned int t_log_count; /* count for perm log res */
	130	unsigned int t_blk_res; /* # of blocks resvd */
	131	unsigned int t_blk_res_used; /* # of resvd blocks used */
	132	unsigned int t_rtx_res; /* # of rt extents resvd */
	133	unsigned int t_rtx_res_used; /* # of resvd rt extents used */
44fd2946	134	unsigned int t_flags; /* misc flags */
692b6cdd	135	xfs_agnumber_t t_highest_agno; /* highest AGF locked */
35a8a72f	136	struct xlog_ticket t_ticket; / log mgr ticket */
847fff5c BN	137	struct xfs_mount t_mountp; / ptr to fs mount struct */
847fff5c BN	138	struct xfs_dquot_acct t_dqinfo; / acctg info for dquots */
847fff5c BN	139	int64_t t_icount_delta; /* superblock icount change */
	140	int64_t t_ifree_delta; /* superblock ifree change */
	141	int64_t t_fdblocks_delta; /* superblock fdblocks chg */
	142	int64_t t_res_fdblocks_delta; /* on-disk only chg */
	143	int64_t t_frextents_delta;/* superblock freextents chg*/
	144	int64_t t_res_frextents_delta; /* on-disk only chg */
847fff5c BN	145	int64_t t_dblocks_delta;/* superblock dblocks change */
	146	int64_t t_agcount_delta;/* superblock agcount change */
	147	int64_t t_imaxpct_delta;/* superblock imaxpct change */
	148	int64_t t_rextsize_delta;/* superblock rextsize chg */
	149	int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */
	150	int64_t t_rblocks_delta;/* superblock rblocks change */
	151	int64_t t_rextents_delta;/* superblocks rextents chg */
	152	int64_t t_rextslog_delta;/* superblocks rextslog chg */
e98c414f	153	struct list_head t_items; /* log item descriptors */
ed3b4d6c	154	struct list_head t_busy; /* list of busy extents */
9d9e6233	155	struct list_head t_dfops; /* deferred operations */
847fff5c BN	156	unsigned long t_pflags; /* saved process flags state */
	157	} xfs_trans_t;
	158
1da177e4 LT	159	/*
	160	* XFS transaction mechanism exported interfaces that are
	161	* actually macros.
	162	*/
1da177e4 LT	163	#define xfs_trans_set_sync(tp) ((tp)->t_flags \|= XFS_TRANS_SYNC)
1da177e4 LT	164
1da177e4 LT	165	/*
	166	* XFS transaction mechanism exported interfaces.
	167	*/
253f4911 CH	168	int xfs_trans_alloc(struct xfs_mount mp, struct xfs_trans_res resp,
	169	uint blocks, uint rtextents, uint flags,
	170	struct xfs_trans **tpp);
e89c0413 DW	171	int xfs_trans_alloc_empty(struct xfs_mount *mp,
e89c0413 DW	172	struct xfs_trans **tpp);
20f4ebf2	173	void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
de2a4f59	174
9676b54e DW	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);
de2a4f59	178
ce92464c	179	static inline int
de2a4f59 DC	180	xfs_trans_get_buf(
	181	struct xfs_trans *tp,
	182	struct xfs_buftarg *target,
	183	xfs_daddr_t blkno,
	184	int numblks,
b9b3fe15	185	xfs_buf_flags_t flags,
ce92464c	186	struct xfs_buf **bpp)
de2a4f59	187	{
c3f8fc73	188	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
ce92464c	189	return xfs_trans_get_buf_map(tp, target, &map, 1, flags, bpp);
de2a4f59 DC	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,
c3f8fc73	197	struct xfs_buf **bpp,
1813dd64	198	const struct xfs_buf_ops *ops);
de2a4f59 DC	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,
c3f8fc73	208	struct xfs_buf **bpp,
1813dd64	209	const struct xfs_buf_ops *ops)
de2a4f59	210	{
c3f8fc73 DC	211	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
c3f8fc73 DC	212	return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
1813dd64	213	flags, bpp, ops);
de2a4f59 DC	214	}
de2a4f59 DC	215
cead0b10	216	struct xfs_buf xfs_trans_getsb(struct xfs_trans );
1da177e4 LT	217
	218	void xfs_trans_brelse(xfs_trans_t , struct xfs_buf );
	219	void xfs_trans_bjoin(xfs_trans_t , struct xfs_buf );
	220	void xfs_trans_bhold(xfs_trans_t , struct xfs_buf );
efa092f3	221	void xfs_trans_bhold_release(xfs_trans_t , struct xfs_buf );
1da177e4 LT	222	void xfs_trans_binval(xfs_trans_t , struct xfs_buf );
1da177e4 LT	223	void xfs_trans_inode_buf(xfs_trans_t , struct xfs_buf );
1da177e4	224	void xfs_trans_stale_inode_buf(xfs_trans_t , struct xfs_buf );
a5814bce	225	bool xfs_trans_ordered_buf(xfs_trans_t , struct xfs_buf );
1da177e4 LT	226	void xfs_trans_dquot_buf(xfs_trans_t , struct xfs_buf , uint);
1da177e4 LT	227	void xfs_trans_inode_alloc_buf(xfs_trans_t , struct xfs_buf );
dcd79a14	228	void xfs_trans_ichgtime(struct xfs_trans , struct xfs_inode , int);
ddc3415a	229	void xfs_trans_ijoin(struct xfs_trans , struct xfs_inode , uint);
9684010d BF	230	void xfs_trans_log_buf(struct xfs_trans , struct xfs_buf , uint,
	231	uint);
	232	void xfs_trans_dirty_buf(struct xfs_trans , struct xfs_buf );
38b6238e	233	bool xfs_trans_buf_is_dirty(struct xfs_buf *bp);
1da177e4	234	void xfs_trans_log_inode(xfs_trans_t , struct xfs_inode , uint);
9749fee8	235
70393313	236	int xfs_trans_commit(struct xfs_trans *);
411350df CH	237	int xfs_trans_roll(struct xfs_trans **);
411350df CH	238	int xfs_trans_roll_inode(struct xfs_trans *, struct xfs_inode );
4906e215	239	void xfs_trans_cancel(xfs_trans_t *);
249a8c11 DC	240	int xfs_trans_ail_init(struct xfs_mount *);
249a8c11 DC	241	void xfs_trans_ail_destroy(struct xfs_mount *);
1da177e4	242
a4fbe6ab DC	243	void xfs_trans_buf_set_type(struct xfs_trans , struct xfs_buf ,
	244	enum xfs_blft);
	245	void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
	246	struct xfs_buf *src_bp);
	247
182696fb	248	extern struct kmem_cache *xfs_trans_cache;
a8272ce0	249
4e919af7 DW	250	static inline struct xfs_log_item *
	251	xfs_trans_item_relog(
	252	struct xfs_log_item *lip,
	253	struct xfs_trans *tp)
	254	{
	255	return lip->li_ops->iop_relog(lip, tp);
	256	}
	257
f2f7b9ff DW	258	struct xfs_dquot;
f2f7b9ff DW	259
3a1af6c3	260	int xfs_trans_alloc_inode(struct xfs_inode ip, struct xfs_trans_res resv,
3de4eb10 DW	261	unsigned int dblocks, unsigned int rblocks, bool force,
3de4eb10 DW	262	struct xfs_trans **tpp);
f2f7b9ff DW	263	int xfs_trans_alloc_icreate(struct xfs_mount mp, struct xfs_trans_res resv,
	264	struct xfs_dquot udqp, struct xfs_dquot gdqp,
	265	struct xfs_dquot *pdqp, unsigned int dblocks,
	266	struct xfs_trans **tpp);
7317a03d DW	267	int xfs_trans_alloc_ichange(struct xfs_inode ip, struct xfs_dquot udqp,
	268	struct xfs_dquot gdqp, struct xfs_dquot pdqp, bool force,
	269	struct xfs_trans **tpp);
871b9316 DW	270	int xfs_trans_alloc_dir(struct xfs_inode dp, struct xfs_trans_res resv,
	271	struct xfs_inode ip, unsigned int dblocks,
	272	struct xfs_trans *tpp, int nospace_error);
3a1af6c3	273
756b1c34 DC	274	static inline void
	275	xfs_trans_set_context(
	276	struct xfs_trans *tp)
	277	{
	278	ASSERT(current->journal_info == NULL);
	279	tp->t_pflags = memalloc_nofs_save();
	280	current->journal_info = tp;
	281	}
	282
	283	static inline void
	284	xfs_trans_clear_context(
	285	struct xfs_trans *tp)
	286	{
	287	if (current->journal_info == tp) {
	288	memalloc_nofs_restore(tp->t_pflags);
	289	current->journal_info = NULL;
	290	}
	291	}
	292
	293	static inline void
	294	xfs_trans_switch_context(
	295	struct xfs_trans *old_tp,
	296	struct xfs_trans *new_tp)
	297	{
	298	ASSERT(current->journal_info == old_tp);
	299	new_tp->t_pflags = old_tp->t_pflags;
	300	old_tp->t_pflags = 0;
	301	current->journal_info = new_tp;
	302	}
	303
1da177e4	304	#endif /* __XFS_TRANS_H__ */