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v5.4
  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
 11struct xfs_buf;
 12struct xfs_buftarg;
 13struct xfs_efd_log_item;
 14struct xfs_efi_log_item;
 15struct xfs_inode;
 16struct xfs_item_ops;
 17struct xfs_log_iovec;
 18struct xfs_mount;
 19struct xfs_trans;
 20struct xfs_trans_res;
 21struct xfs_dquot_acct;
 22struct xfs_rud_log_item;
 23struct xfs_rui_log_item;
 24struct xfs_btree_cur;
 25struct xfs_cui_log_item;
 26struct xfs_cud_log_item;
 27struct xfs_bui_log_item;
 28struct xfs_bud_log_item;
 29
 30struct xfs_log_item {
 31	struct list_head		li_ail;		/* AIL pointers */
 32	struct list_head		li_trans;	/* transaction list */
 33	xfs_lsn_t			li_lsn;		/* last on-disk lsn */
 34	struct xfs_mount		*li_mountp;	/* ptr to fs mount */
 35	struct xfs_ail			*li_ailp;	/* ptr to AIL */
 36	uint				li_type;	/* item type */
 37	unsigned long			li_flags;	/* misc flags */
 38	struct xfs_buf			*li_buf;	/* real buffer pointer */
 39	struct list_head		li_bio_list;	/* buffer item list */
 40	void				(*li_cb)(struct xfs_buf *,
 41						 struct xfs_log_item *);
 42							/* buffer item iodone */
 43							/* callback func */
 44	const struct xfs_item_ops	*li_ops;	/* function list */
 45
 46	/* delayed logging */
 47	struct list_head		li_cil;		/* CIL pointers */
 48	struct xfs_log_vec		*li_lv;		/* active log vector */
 49	struct xfs_log_vec		*li_lv_shadow;	/* standby vector */
 50	xfs_lsn_t			li_seq;		/* CIL commit seq */
 51};
 52
 53/*
 54 * li_flags use the (set/test/clear)_bit atomic interfaces because updates can
 55 * race with each other and we don't want to have to use the AIL lock to
 56 * serialise all updates.
 57 */
 58#define	XFS_LI_IN_AIL	0
 59#define	XFS_LI_ABORTED	1
 60#define	XFS_LI_FAILED	2
 61#define	XFS_LI_DIRTY	3	/* log item dirty in transaction */
 62
 63#define XFS_LI_FLAGS \
 64	{ (1 << XFS_LI_IN_AIL),		"IN_AIL" }, \
 65	{ (1 << XFS_LI_ABORTED),	"ABORTED" }, \
 66	{ (1 << XFS_LI_FAILED),		"FAILED" }, \
 67	{ (1 << XFS_LI_DIRTY),		"DIRTY" }
 68
 69struct xfs_item_ops {
 70	unsigned flags;
 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);
 75	uint (*iop_push)(struct xfs_log_item *, struct list_head *);
 76	void (*iop_committing)(struct xfs_log_item *, xfs_lsn_t commit_lsn);
 77	void (*iop_release)(struct xfs_log_item *);
 78	xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t);
 79	void (*iop_error)(struct xfs_log_item *, xfs_buf_t *);
 
 
 
 
 80};
 81
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 82/*
 83 * Release the log item as soon as committed.  This is for items just logging
 84 * intents that never need to be written back in place.
 85 */
 86#define XFS_ITEM_RELEASE_WHEN_COMMITTED	(1 << 0)
 87
 88void	xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
 89			  int type, const struct xfs_item_ops *ops);
 90
 91/*
 92 * Return values for the iop_push() routines.
 93 */
 94#define XFS_ITEM_SUCCESS	0
 95#define XFS_ITEM_PINNED		1
 96#define XFS_ITEM_LOCKED		2
 97#define XFS_ITEM_FLUSHING	3
 98
 99/*
100 * Deferred operation item relogging limits.
101 */
102#define XFS_DEFER_OPS_NR_INODES	2	/* join up to two inodes */
103#define XFS_DEFER_OPS_NR_BUFS	2	/* join up to two buffers */
104
105/*
106 * This is the structure maintained for every active transaction.
107 */
108typedef struct xfs_trans {
109	unsigned int		t_magic;	/* magic number */
110	unsigned int		t_log_res;	/* amt of log space resvd */
111	unsigned int		t_log_count;	/* count for perm log res */
112	unsigned int		t_blk_res;	/* # of blocks resvd */
113	unsigned int		t_blk_res_used;	/* # of resvd blocks used */
114	unsigned int		t_rtx_res;	/* # of rt extents resvd */
115	unsigned int		t_rtx_res_used;	/* # of resvd rt extents used */
116	unsigned int		t_flags;	/* misc flags */
117	xfs_fsblock_t		t_firstblock;	/* first block allocated */
118	struct xlog_ticket	*t_ticket;	/* log mgr ticket */
119	struct xfs_mount	*t_mountp;	/* ptr to fs mount struct */
120	struct xfs_dquot_acct   *t_dqinfo;	/* acctg info for dquots */
121	int64_t			t_icount_delta;	/* superblock icount change */
122	int64_t			t_ifree_delta;	/* superblock ifree change */
123	int64_t			t_fdblocks_delta; /* superblock fdblocks chg */
124	int64_t			t_res_fdblocks_delta; /* on-disk only chg */
125	int64_t			t_frextents_delta;/* superblock freextents chg*/
126	int64_t			t_res_frextents_delta; /* on-disk only chg */
127#if defined(DEBUG) || defined(XFS_WARN)
128	int64_t			t_ag_freeblks_delta; /* debugging counter */
129	int64_t			t_ag_flist_delta; /* debugging counter */
130	int64_t			t_ag_btree_delta; /* debugging counter */
131#endif
132	int64_t			t_dblocks_delta;/* superblock dblocks change */
133	int64_t			t_agcount_delta;/* superblock agcount change */
134	int64_t			t_imaxpct_delta;/* superblock imaxpct change */
135	int64_t			t_rextsize_delta;/* superblock rextsize chg */
136	int64_t			t_rbmblocks_delta;/* superblock rbmblocks chg */
137	int64_t			t_rblocks_delta;/* superblock rblocks change */
138	int64_t			t_rextents_delta;/* superblocks rextents chg */
139	int64_t			t_rextslog_delta;/* superblocks rextslog chg */
140	struct list_head	t_items;	/* log item descriptors */
141	struct list_head	t_busy;		/* list of busy extents */
142	struct list_head	t_dfops;	/* deferred operations */
143	unsigned long		t_pflags;	/* saved process flags state */
144} xfs_trans_t;
145
146/*
147 * XFS transaction mechanism exported interfaces that are
148 * actually macros.
149 */
150#define	xfs_trans_set_sync(tp)		((tp)->t_flags |= XFS_TRANS_SYNC)
151
152#if defined(DEBUG) || defined(XFS_WARN)
153#define	xfs_trans_agblocks_delta(tp, d)	((tp)->t_ag_freeblks_delta += (int64_t)d)
154#define	xfs_trans_agflist_delta(tp, d)	((tp)->t_ag_flist_delta += (int64_t)d)
155#define	xfs_trans_agbtree_delta(tp, d)	((tp)->t_ag_btree_delta += (int64_t)d)
156#else
157#define	xfs_trans_agblocks_delta(tp, d)
158#define	xfs_trans_agflist_delta(tp, d)
159#define	xfs_trans_agbtree_delta(tp, d)
160#endif
161
162/*
163 * XFS transaction mechanism exported interfaces.
164 */
165int		xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp,
166			uint blocks, uint rtextents, uint flags,
167			struct xfs_trans **tpp);
168int		xfs_trans_alloc_empty(struct xfs_mount *mp,
169			struct xfs_trans **tpp);
170void		xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
171
172struct xfs_buf	*xfs_trans_get_buf_map(struct xfs_trans *tp,
173				       struct xfs_buftarg *target,
174				       struct xfs_buf_map *map, int nmaps,
175				       uint flags);
176
177static inline struct xfs_buf *
178xfs_trans_get_buf(
179	struct xfs_trans	*tp,
180	struct xfs_buftarg	*target,
181	xfs_daddr_t		blkno,
182	int			numblks,
183	uint			flags)
 
184{
185	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
186	return xfs_trans_get_buf_map(tp, target, &map, 1, flags);
187}
188
189int		xfs_trans_read_buf_map(struct xfs_mount *mp,
190				       struct xfs_trans *tp,
191				       struct xfs_buftarg *target,
192				       struct xfs_buf_map *map, int nmaps,
193				       xfs_buf_flags_t flags,
194				       struct xfs_buf **bpp,
195				       const struct xfs_buf_ops *ops);
196
197static inline int
198xfs_trans_read_buf(
199	struct xfs_mount	*mp,
200	struct xfs_trans	*tp,
201	struct xfs_buftarg	*target,
202	xfs_daddr_t		blkno,
203	int			numblks,
204	xfs_buf_flags_t		flags,
205	struct xfs_buf		**bpp,
206	const struct xfs_buf_ops *ops)
207{
208	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
209	return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
210				      flags, bpp, ops);
211}
212
213struct xfs_buf	*xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *);
214
215void		xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
216void		xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
217void		xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
218void		xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
219void		xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
220void		xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
221void		xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
222bool		xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
223void		xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
224void		xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
225void		xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
226void		xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
227void		xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint,
228				  uint);
229void		xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *);
230bool		xfs_trans_buf_is_dirty(struct xfs_buf *bp);
231void		xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
232
233int		xfs_trans_commit(struct xfs_trans *);
234int		xfs_trans_roll(struct xfs_trans **);
235int		xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *);
236void		xfs_trans_cancel(xfs_trans_t *);
237int		xfs_trans_ail_init(struct xfs_mount *);
238void		xfs_trans_ail_destroy(struct xfs_mount *);
239
240void		xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *,
241				       enum xfs_blft);
242void		xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
243					struct xfs_buf *src_bp);
244
245extern kmem_zone_t	*xfs_trans_zone;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
246
247#endif	/* __XFS_TRANS_H__ */
v5.14.15
  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
 11struct xfs_buf;
 12struct xfs_buftarg;
 13struct xfs_efd_log_item;
 14struct xfs_efi_log_item;
 15struct xfs_inode;
 16struct xfs_item_ops;
 17struct xfs_log_iovec;
 18struct xfs_mount;
 19struct xfs_trans;
 20struct xfs_trans_res;
 21struct xfs_dquot_acct;
 22struct xfs_rud_log_item;
 23struct xfs_rui_log_item;
 24struct xfs_btree_cur;
 25struct xfs_cui_log_item;
 26struct xfs_cud_log_item;
 27struct xfs_bui_log_item;
 28struct xfs_bud_log_item;
 29
 30struct xfs_log_item {
 31	struct list_head		li_ail;		/* AIL pointers */
 32	struct list_head		li_trans;	/* transaction list */
 33	xfs_lsn_t			li_lsn;		/* last on-disk lsn */
 34	struct xfs_mount		*li_mountp;	/* ptr to fs mount */
 35	struct xfs_ail			*li_ailp;	/* ptr to AIL */
 36	uint				li_type;	/* item type */
 37	unsigned long			li_flags;	/* misc flags */
 38	struct xfs_buf			*li_buf;	/* real buffer pointer */
 39	struct list_head		li_bio_list;	/* buffer item list */
 
 
 
 
 40	const struct xfs_item_ops	*li_ops;	/* function list */
 41
 42	/* delayed logging */
 43	struct list_head		li_cil;		/* CIL pointers */
 44	struct xfs_log_vec		*li_lv;		/* active log vector */
 45	struct xfs_log_vec		*li_lv_shadow;	/* standby vector */
 46	xfs_csn_t			li_seq;		/* CIL commit seq */
 47};
 48
 49/*
 50 * li_flags use the (set/test/clear)_bit atomic interfaces because updates can
 51 * race with each other and we don't want to have to use the AIL lock to
 52 * serialise all updates.
 53 */
 54#define	XFS_LI_IN_AIL	0
 55#define	XFS_LI_ABORTED	1
 56#define	XFS_LI_FAILED	2
 57#define	XFS_LI_DIRTY	3	/* log item dirty in transaction */
 58
 59#define XFS_LI_FLAGS \
 60	{ (1 << XFS_LI_IN_AIL),		"IN_AIL" }, \
 61	{ (1 << XFS_LI_ABORTED),	"ABORTED" }, \
 62	{ (1 << XFS_LI_FAILED),		"FAILED" }, \
 63	{ (1 << XFS_LI_DIRTY),		"DIRTY" }
 64
 65struct xfs_item_ops {
 66	unsigned flags;
 67	void (*iop_size)(struct xfs_log_item *, int *, int *);
 68	void (*iop_format)(struct xfs_log_item *, struct xfs_log_vec *);
 69	void (*iop_pin)(struct xfs_log_item *);
 70	void (*iop_unpin)(struct xfs_log_item *, int remove);
 71	uint (*iop_push)(struct xfs_log_item *, struct list_head *);
 72	void (*iop_committing)(struct xfs_log_item *lip, xfs_csn_t seq);
 73	void (*iop_release)(struct xfs_log_item *);
 74	xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t);
 75	int (*iop_recover)(struct xfs_log_item *lip,
 76			   struct list_head *capture_list);
 77	bool (*iop_match)(struct xfs_log_item *item, uint64_t id);
 78	struct xfs_log_item *(*iop_relog)(struct xfs_log_item *intent,
 79			struct xfs_trans *tp);
 80};
 81
 82/* Is this log item a deferred action intent? */
 83static inline bool
 84xlog_item_is_intent(struct xfs_log_item *lip)
 85{
 86	return lip->li_ops->iop_recover != NULL &&
 87	       lip->li_ops->iop_match != NULL;
 88}
 89
 90/* Is this a log intent-done item? */
 91static inline bool
 92xlog_item_is_intent_done(struct xfs_log_item *lip)
 93{
 94	return lip->li_ops->iop_unpin == NULL &&
 95	       lip->li_ops->iop_push == NULL;
 96}
 97
 98/*
 99 * Release the log item as soon as committed.  This is for items just logging
100 * intents that never need to be written back in place.
101 */
102#define XFS_ITEM_RELEASE_WHEN_COMMITTED	(1 << 0)
103
104void	xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
105			  int type, const struct xfs_item_ops *ops);
106
107/*
108 * Return values for the iop_push() routines.
109 */
110#define XFS_ITEM_SUCCESS	0
111#define XFS_ITEM_PINNED		1
112#define XFS_ITEM_LOCKED		2
113#define XFS_ITEM_FLUSHING	3
114
115/*
116 * Deferred operation item relogging limits.
117 */
118#define XFS_DEFER_OPS_NR_INODES	2	/* join up to two inodes */
119#define XFS_DEFER_OPS_NR_BUFS	2	/* join up to two buffers */
120
121/*
122 * This is the structure maintained for every active transaction.
123 */
124typedef struct xfs_trans {
125	unsigned int		t_magic;	/* magic number */
126	unsigned int		t_log_res;	/* amt of log space resvd */
127	unsigned int		t_log_count;	/* count for perm log res */
128	unsigned int		t_blk_res;	/* # of blocks resvd */
129	unsigned int		t_blk_res_used;	/* # of resvd blocks used */
130	unsigned int		t_rtx_res;	/* # of rt extents resvd */
131	unsigned int		t_rtx_res_used;	/* # of resvd rt extents used */
132	unsigned int		t_flags;	/* misc flags */
133	xfs_fsblock_t		t_firstblock;	/* first block allocated */
134	struct xlog_ticket	*t_ticket;	/* log mgr ticket */
135	struct xfs_mount	*t_mountp;	/* ptr to fs mount struct */
136	struct xfs_dquot_acct   *t_dqinfo;	/* acctg info for dquots */
137	int64_t			t_icount_delta;	/* superblock icount change */
138	int64_t			t_ifree_delta;	/* superblock ifree change */
139	int64_t			t_fdblocks_delta; /* superblock fdblocks chg */
140	int64_t			t_res_fdblocks_delta; /* on-disk only chg */
141	int64_t			t_frextents_delta;/* superblock freextents chg*/
142	int64_t			t_res_frextents_delta; /* on-disk only chg */
 
 
 
 
 
143	int64_t			t_dblocks_delta;/* superblock dblocks change */
144	int64_t			t_agcount_delta;/* superblock agcount change */
145	int64_t			t_imaxpct_delta;/* superblock imaxpct change */
146	int64_t			t_rextsize_delta;/* superblock rextsize chg */
147	int64_t			t_rbmblocks_delta;/* superblock rbmblocks chg */
148	int64_t			t_rblocks_delta;/* superblock rblocks change */
149	int64_t			t_rextents_delta;/* superblocks rextents chg */
150	int64_t			t_rextslog_delta;/* superblocks rextslog chg */
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 */
166int		xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp,
167			uint blocks, uint rtextents, uint flags,
168			struct xfs_trans **tpp);
169int		xfs_trans_alloc_empty(struct xfs_mount *mp,
170			struct xfs_trans **tpp);
171void		xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
172
173int xfs_trans_get_buf_map(struct xfs_trans *tp, struct xfs_buftarg *target,
174		struct xfs_buf_map *map, int nmaps, xfs_buf_flags_t flags,
175		struct xfs_buf **bpp);
 
176
177static inline int
178xfs_trans_get_buf(
179	struct xfs_trans	*tp,
180	struct xfs_buftarg	*target,
181	xfs_daddr_t		blkno,
182	int			numblks,
183	uint			flags,
184	struct xfs_buf		**bpp)
185{
186	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
187	return xfs_trans_get_buf_map(tp, target, &map, 1, flags, bpp);
188}
189
190int		xfs_trans_read_buf_map(struct xfs_mount *mp,
191				       struct xfs_trans *tp,
192				       struct xfs_buftarg *target,
193				       struct xfs_buf_map *map, int nmaps,
194				       xfs_buf_flags_t flags,
195				       struct xfs_buf **bpp,
196				       const struct xfs_buf_ops *ops);
197
198static inline int
199xfs_trans_read_buf(
200	struct xfs_mount	*mp,
201	struct xfs_trans	*tp,
202	struct xfs_buftarg	*target,
203	xfs_daddr_t		blkno,
204	int			numblks,
205	xfs_buf_flags_t		flags,
206	struct xfs_buf		**bpp,
207	const struct xfs_buf_ops *ops)
208{
209	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
210	return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
211				      flags, bpp, ops);
212}
213
214struct xfs_buf	*xfs_trans_getsb(struct xfs_trans *);
215
216void		xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
217void		xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
218void		xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
219void		xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
220void		xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
221void		xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
222void		xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
223bool		xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
224void		xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
225void		xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
226void		xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
227void		xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
228void		xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint,
229				  uint);
230void		xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *);
231bool		xfs_trans_buf_is_dirty(struct xfs_buf *bp);
232void		xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
233
234int		xfs_trans_commit(struct xfs_trans *);
235int		xfs_trans_roll(struct xfs_trans **);
236int		xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *);
237void		xfs_trans_cancel(xfs_trans_t *);
238int		xfs_trans_ail_init(struct xfs_mount *);
239void		xfs_trans_ail_destroy(struct xfs_mount *);
240
241void		xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *,
242				       enum xfs_blft);
243void		xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
244					struct xfs_buf *src_bp);
245
246extern kmem_zone_t	*xfs_trans_zone;
247
248static inline struct xfs_log_item *
249xfs_trans_item_relog(
250	struct xfs_log_item	*lip,
251	struct xfs_trans	*tp)
252{
253	return lip->li_ops->iop_relog(lip, tp);
254}
255
256struct xfs_dquot;
257
258int xfs_trans_alloc_inode(struct xfs_inode *ip, struct xfs_trans_res *resv,
259		unsigned int dblocks, unsigned int rblocks, bool force,
260		struct xfs_trans **tpp);
261int xfs_trans_alloc_icreate(struct xfs_mount *mp, struct xfs_trans_res *resv,
262		struct xfs_dquot *udqp, struct xfs_dquot *gdqp,
263		struct xfs_dquot *pdqp, unsigned int dblocks,
264		struct xfs_trans **tpp);
265int xfs_trans_alloc_ichange(struct xfs_inode *ip, struct xfs_dquot *udqp,
266		struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, bool force,
267		struct xfs_trans **tpp);
268
269static inline void
270xfs_trans_set_context(
271	struct xfs_trans	*tp)
272{
273	ASSERT(current->journal_info == NULL);
274	tp->t_pflags = memalloc_nofs_save();
275	current->journal_info = tp;
276}
277
278static inline void
279xfs_trans_clear_context(
280	struct xfs_trans	*tp)
281{
282	if (current->journal_info == tp) {
283		memalloc_nofs_restore(tp->t_pflags);
284		current->journal_info = NULL;
285	}
286}
287
288static inline void
289xfs_trans_switch_context(
290	struct xfs_trans	*old_tp,
291	struct xfs_trans	*new_tp)
292{
293	ASSERT(current->journal_info == old_tp);
294	new_tp->t_pflags = old_tp->t_pflags;
295	old_tp->t_pflags = 0;
296	current->journal_info = new_tp;
297}
298
299#endif	/* __XFS_TRANS_H__ */