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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 xlog;
12struct xfs_buf;
13struct xfs_buftarg;
14struct xfs_efd_log_item;
15struct xfs_efi_log_item;
16struct xfs_inode;
17struct xfs_item_ops;
18struct xfs_log_iovec;
19struct xfs_mount;
20struct xfs_trans;
21struct xfs_trans_res;
22struct xfs_dquot_acct;
23struct xfs_rud_log_item;
24struct xfs_rui_log_item;
25struct xfs_btree_cur;
26struct xfs_cui_log_item;
27struct xfs_cud_log_item;
28struct xfs_bui_log_item;
29struct xfs_bud_log_item;
30
31struct 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
62#define XFS_LI_FLAGS \
63 { (1u << XFS_LI_IN_AIL), "IN_AIL" }, \
64 { (1u << XFS_LI_ABORTED), "ABORTED" }, \
65 { (1u << XFS_LI_FAILED), "FAILED" }, \
66 { (1u << XFS_LI_DIRTY), "DIRTY" }, \
67 { (1u << XFS_LI_WHITEOUT), "WHITEOUT" }
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 uint64_t (*iop_sort)(struct xfs_log_item *lip);
76 int (*iop_precommit)(struct xfs_trans *tp, struct xfs_log_item *lip);
77 void (*iop_committing)(struct xfs_log_item *lip, xfs_csn_t seq);
78 xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t);
79 uint (*iop_push)(struct xfs_log_item *, struct list_head *);
80 void (*iop_release)(struct xfs_log_item *);
81 bool (*iop_match)(struct xfs_log_item *item, uint64_t id);
82 struct xfs_log_item *(*iop_intent)(struct xfs_log_item *intent_done);
83};
84
85/*
86 * Log item ops flags
87 */
88/*
89 * Release the log item when the journal commits instead of inserting into the
90 * AIL for writeback tracking and/or log tail pinning.
91 */
92#define XFS_ITEM_RELEASE_WHEN_COMMITTED (1 << 0)
93#define XFS_ITEM_INTENT (1 << 1)
94#define XFS_ITEM_INTENT_DONE (1 << 2)
95
96static inline bool
97xlog_item_is_intent(struct xfs_log_item *lip)
98{
99 return lip->li_ops->flags & XFS_ITEM_INTENT;
100}
101
102static inline bool
103xlog_item_is_intent_done(struct xfs_log_item *lip)
104{
105 return lip->li_ops->flags & XFS_ITEM_INTENT_DONE;
106}
107
108void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
109 int type, const struct xfs_item_ops *ops);
110
111/*
112 * Return values for the iop_push() routines.
113 */
114#define XFS_ITEM_SUCCESS 0
115#define XFS_ITEM_PINNED 1
116#define XFS_ITEM_LOCKED 2
117#define XFS_ITEM_FLUSHING 3
118
119/*
120 * This is the structure maintained for every active transaction.
121 */
122typedef struct xfs_trans {
123 unsigned int t_magic; /* magic number */
124 unsigned int t_log_res; /* amt of log space resvd */
125 unsigned int t_log_count; /* count for perm log res */
126 unsigned int t_blk_res; /* # of blocks resvd */
127 unsigned int t_blk_res_used; /* # of resvd blocks used */
128 unsigned int t_rtx_res; /* # of rt extents resvd */
129 unsigned int t_rtx_res_used; /* # of resvd rt extents used */
130 unsigned int t_flags; /* misc flags */
131 xfs_agnumber_t t_highest_agno; /* highest AGF locked */
132 struct xlog_ticket *t_ticket; /* log mgr ticket */
133 struct xfs_mount *t_mountp; /* ptr to fs mount struct */
134 struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */
135 int64_t t_icount_delta; /* superblock icount change */
136 int64_t t_ifree_delta; /* superblock ifree change */
137 int64_t t_fdblocks_delta; /* superblock fdblocks chg */
138 int64_t t_res_fdblocks_delta; /* on-disk only chg */
139 int64_t t_frextents_delta;/* superblock freextents chg*/
140 int64_t t_res_frextents_delta; /* on-disk only chg */
141 int64_t t_dblocks_delta;/* superblock dblocks change */
142 int64_t t_agcount_delta;/* superblock agcount change */
143 int64_t t_imaxpct_delta;/* superblock imaxpct change */
144 int64_t t_rextsize_delta;/* superblock rextsize chg */
145 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */
146 int64_t t_rblocks_delta;/* superblock rblocks change */
147 int64_t t_rextents_delta;/* superblocks rextents chg */
148 int64_t t_rextslog_delta;/* superblocks rextslog chg */
149 struct list_head t_items; /* log item descriptors */
150 struct list_head t_busy; /* list of busy extents */
151 struct list_head t_dfops; /* deferred operations */
152 unsigned long t_pflags; /* saved process flags state */
153} xfs_trans_t;
154
155/*
156 * XFS transaction mechanism exported interfaces that are
157 * actually macros.
158 */
159#define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC)
160
161/*
162 * XFS transaction mechanism exported interfaces.
163 */
164int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp,
165 uint blocks, uint rtextents, uint flags,
166 struct xfs_trans **tpp);
167int xfs_trans_reserve_more(struct xfs_trans *tp,
168 unsigned int blocks, unsigned int rtextents);
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 xfs_buf_flags_t 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_bdetach(struct xfs_trans *tp, struct xfs_buf *bp);
219void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
220void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
221void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
222void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
223void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
224bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
225void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
226void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
227void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
228void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
229void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint,
230 uint);
231void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *);
232bool xfs_trans_buf_is_dirty(struct xfs_buf *bp);
233void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
234
235int xfs_trans_commit(struct xfs_trans *);
236int xfs_trans_roll(struct xfs_trans **);
237int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *);
238void xfs_trans_cancel(xfs_trans_t *);
239int xfs_trans_ail_init(struct xfs_mount *);
240void xfs_trans_ail_destroy(struct xfs_mount *);
241
242void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *,
243 enum xfs_blft);
244void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
245 struct xfs_buf *src_bp);
246
247extern struct kmem_cache *xfs_trans_cache;
248
249struct xfs_dquot;
250
251int xfs_trans_alloc_inode(struct xfs_inode *ip, struct xfs_trans_res *resv,
252 unsigned int dblocks, unsigned int rblocks, bool force,
253 struct xfs_trans **tpp);
254int xfs_trans_reserve_more_inode(struct xfs_trans *tp, struct xfs_inode *ip,
255 unsigned int dblocks, unsigned int rblocks, bool force_quota);
256int xfs_trans_alloc_icreate(struct xfs_mount *mp, struct xfs_trans_res *resv,
257 struct xfs_dquot *udqp, struct xfs_dquot *gdqp,
258 struct xfs_dquot *pdqp, unsigned int dblocks,
259 struct xfs_trans **tpp);
260int xfs_trans_alloc_ichange(struct xfs_inode *ip, struct xfs_dquot *udqp,
261 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, bool force,
262 struct xfs_trans **tpp);
263int xfs_trans_alloc_dir(struct xfs_inode *dp, struct xfs_trans_res *resv,
264 struct xfs_inode *ip, unsigned int *dblocks,
265 struct xfs_trans **tpp, int *nospace_error);
266
267static inline void
268xfs_trans_set_context(
269 struct xfs_trans *tp)
270{
271 tp->t_pflags = memalloc_nofs_save();
272}
273
274static inline void
275xfs_trans_clear_context(
276 struct xfs_trans *tp)
277{
278 memalloc_nofs_restore(tp->t_pflags);
279}
280
281static inline void
282xfs_trans_switch_context(
283 struct xfs_trans *old_tp,
284 struct xfs_trans *new_tp)
285{
286 new_tp->t_pflags = old_tp->t_pflags;
287 old_tp->t_pflags = 0;
288}
289
290#endif /* __XFS_TRANS_H__ */
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 xlog;
12struct xfs_buf;
13struct xfs_buftarg;
14struct xfs_efd_log_item;
15struct xfs_efi_log_item;
16struct xfs_inode;
17struct xfs_item_ops;
18struct xfs_log_iovec;
19struct xfs_mount;
20struct xfs_trans;
21struct xfs_trans_res;
22struct xfs_dquot_acct;
23struct xfs_rud_log_item;
24struct xfs_rui_log_item;
25struct xfs_btree_cur;
26struct xfs_cui_log_item;
27struct xfs_cud_log_item;
28struct xfs_bui_log_item;
29struct xfs_bud_log_item;
30
31struct 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
62#define XFS_LI_FLAGS \
63 { (1u << XFS_LI_IN_AIL), "IN_AIL" }, \
64 { (1u << XFS_LI_ABORTED), "ABORTED" }, \
65 { (1u << XFS_LI_FAILED), "FAILED" }, \
66 { (1u << XFS_LI_DIRTY), "DIRTY" }, \
67 { (1u << XFS_LI_WHITEOUT), "WHITEOUT" }
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 uint64_t (*iop_sort)(struct xfs_log_item *lip);
76 int (*iop_precommit)(struct xfs_trans *tp, struct xfs_log_item *lip);
77 void (*iop_committing)(struct xfs_log_item *lip, xfs_csn_t seq);
78 xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t);
79 uint (*iop_push)(struct xfs_log_item *, struct list_head *);
80 void (*iop_release)(struct xfs_log_item *);
81 int (*iop_recover)(struct xfs_log_item *lip,
82 struct list_head *capture_list);
83 bool (*iop_match)(struct xfs_log_item *item, uint64_t id);
84 struct xfs_log_item *(*iop_relog)(struct xfs_log_item *intent,
85 struct xfs_trans *tp);
86 struct xfs_log_item *(*iop_intent)(struct xfs_log_item *intent_done);
87};
88
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
100static inline bool
101xlog_item_is_intent(struct xfs_log_item *lip)
102{
103 return lip->li_ops->flags & XFS_ITEM_INTENT;
104}
105
106static inline bool
107xlog_item_is_intent_done(struct xfs_log_item *lip)
108{
109 return lip->li_ops->flags & XFS_ITEM_INTENT_DONE;
110}
111
112void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
113 int type, const struct xfs_item_ops *ops);
114
115/*
116 * Return values for the iop_push() routines.
117 */
118#define XFS_ITEM_SUCCESS 0
119#define XFS_ITEM_PINNED 1
120#define XFS_ITEM_LOCKED 2
121#define XFS_ITEM_FLUSHING 3
122
123/*
124 * This is the structure maintained for every active transaction.
125 */
126typedef struct xfs_trans {
127 unsigned int t_magic; /* magic number */
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 */
134 unsigned int t_flags; /* misc flags */
135 xfs_fsblock_t t_firstblock; /* first block allocated */
136 struct xlog_ticket *t_ticket; /* log mgr ticket */
137 struct xfs_mount *t_mountp; /* ptr to fs mount struct */
138 struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */
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 */
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 */
153 struct list_head t_items; /* log item descriptors */
154 struct list_head t_busy; /* list of busy extents */
155 struct list_head t_dfops; /* deferred operations */
156 unsigned long t_pflags; /* saved process flags state */
157} xfs_trans_t;
158
159/*
160 * XFS transaction mechanism exported interfaces that are
161 * actually macros.
162 */
163#define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC)
164
165/*
166 * XFS transaction mechanism exported interfaces.
167 */
168int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp,
169 uint blocks, uint rtextents, uint flags,
170 struct xfs_trans **tpp);
171int xfs_trans_alloc_empty(struct xfs_mount *mp,
172 struct xfs_trans **tpp);
173void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
174
175int 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
179static inline int
180xfs_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
192int 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
200static inline int
201xfs_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
216struct xfs_buf *xfs_trans_getsb(struct xfs_trans *);
217
218void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
219void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
220void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
221void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
222void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
223void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
224void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
225bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
226void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
227void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
228void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
229void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
230void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint,
231 uint);
232void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *);
233bool xfs_trans_buf_is_dirty(struct xfs_buf *bp);
234void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
235
236int xfs_trans_commit(struct xfs_trans *);
237int xfs_trans_roll(struct xfs_trans **);
238int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *);
239void xfs_trans_cancel(xfs_trans_t *);
240int xfs_trans_ail_init(struct xfs_mount *);
241void xfs_trans_ail_destroy(struct xfs_mount *);
242
243void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *,
244 enum xfs_blft);
245void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
246 struct xfs_buf *src_bp);
247
248extern struct kmem_cache *xfs_trans_cache;
249
250static inline struct xfs_log_item *
251xfs_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
258struct xfs_dquot;
259
260int xfs_trans_alloc_inode(struct xfs_inode *ip, struct xfs_trans_res *resv,
261 unsigned int dblocks, unsigned int rblocks, bool force,
262 struct xfs_trans **tpp);
263int 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);
267int 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);
270int 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);
273
274static inline void
275xfs_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
283static inline void
284xfs_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
293static inline void
294xfs_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
304#endif /* __XFS_TRANS_H__ */