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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_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 xlog *li_log;
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 uint32_t li_order_id; /* CIL commit order */
48};
49
50/*
51 * li_flags use the (set/test/clear)_bit atomic interfaces because updates can
52 * race with each other and we don't want to have to use the AIL lock to
53 * serialise all updates.
54 */
55#define XFS_LI_IN_AIL 0
56#define XFS_LI_ABORTED 1
57#define XFS_LI_FAILED 2
58#define XFS_LI_DIRTY 3
59#define XFS_LI_WHITEOUT 4
60#define XFS_LI_FLUSHING 5
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 { (1u << XFS_LI_FLUSHING), "FLUSHING" }
69
70struct xfs_item_ops {
71 unsigned flags;
72 void (*iop_size)(struct xfs_log_item *, int *, int *);
73 void (*iop_format)(struct xfs_log_item *, struct xfs_log_vec *);
74 void (*iop_pin)(struct xfs_log_item *);
75 void (*iop_unpin)(struct xfs_log_item *, int remove);
76 uint64_t (*iop_sort)(struct xfs_log_item *lip);
77 int (*iop_precommit)(struct xfs_trans *tp, struct xfs_log_item *lip);
78 void (*iop_committing)(struct xfs_log_item *lip, xfs_csn_t seq);
79 xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t);
80 uint (*iop_push)(struct xfs_log_item *, struct list_head *);
81 void (*iop_release)(struct xfs_log_item *);
82 bool (*iop_match)(struct xfs_log_item *item, uint64_t id);
83 struct xfs_log_item *(*iop_intent)(struct xfs_log_item *intent_done);
84};
85
86/*
87 * Log item ops flags
88 */
89/*
90 * Release the log item when the journal commits instead of inserting into the
91 * AIL for writeback tracking and/or log tail pinning.
92 */
93#define XFS_ITEM_RELEASE_WHEN_COMMITTED (1 << 0)
94#define XFS_ITEM_INTENT (1 << 1)
95#define XFS_ITEM_INTENT_DONE (1 << 2)
96
97static inline bool
98xlog_item_is_intent(struct xfs_log_item *lip)
99{
100 return lip->li_ops->flags & XFS_ITEM_INTENT;
101}
102
103static inline bool
104xlog_item_is_intent_done(struct xfs_log_item *lip)
105{
106 return lip->li_ops->flags & XFS_ITEM_INTENT_DONE;
107}
108
109void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
110 int type, const struct xfs_item_ops *ops);
111
112/*
113 * Return values for the iop_push() routines.
114 */
115#define XFS_ITEM_SUCCESS 0
116#define XFS_ITEM_PINNED 1
117#define XFS_ITEM_LOCKED 2
118#define XFS_ITEM_FLUSHING 3
119
120/*
121 * This is the structure maintained for every active transaction.
122 */
123typedef struct xfs_trans {
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 int64_t t_rgcount_delta; /* realtime group count */
150 struct list_head t_items; /* log item descriptors */
151 struct list_head t_busy; /* list of busy extents */
152 struct list_head t_dfops; /* deferred operations */
153 unsigned long t_pflags; /* saved process flags state */
154} xfs_trans_t;
155
156/*
157 * XFS transaction mechanism exported interfaces that are
158 * actually macros.
159 */
160#define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC)
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_reserve_more(struct xfs_trans *tp,
169 unsigned int blocks, unsigned int rtextents);
170struct xfs_trans *xfs_trans_alloc_empty(struct xfs_mount *mp);
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 *);
215struct xfs_buf *xfs_trans_getrtsb(struct xfs_trans *tp);
216
217void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
218void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
219void xfs_trans_bdetach(struct xfs_trans *tp, struct xfs_buf *bp);
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_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__ */