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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 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
30typedef struct 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} xfs_log_item_t;
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 void (*iop_size)(xfs_log_item_t *, int *, int *);
71 void (*iop_format)(xfs_log_item_t *, struct xfs_log_vec *);
72 void (*iop_pin)(xfs_log_item_t *);
73 void (*iop_unpin)(xfs_log_item_t *, int remove);
74 uint (*iop_push)(struct xfs_log_item *, struct list_head *);
75 void (*iop_unlock)(xfs_log_item_t *);
76 xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
77 void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
78 void (*iop_error)(xfs_log_item_t *, xfs_buf_t *);
79};
80
81void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
82 int type, const struct xfs_item_ops *ops);
83
84/*
85 * Return values for the iop_push() routines.
86 */
87#define XFS_ITEM_SUCCESS 0
88#define XFS_ITEM_PINNED 1
89#define XFS_ITEM_LOCKED 2
90#define XFS_ITEM_FLUSHING 3
91
92/*
93 * Deferred operation item relogging limits.
94 */
95#define XFS_DEFER_OPS_NR_INODES 2 /* join up to two inodes */
96#define XFS_DEFER_OPS_NR_BUFS 2 /* join up to two buffers */
97
98/*
99 * This is the structure maintained for every active transaction.
100 */
101typedef struct xfs_trans {
102 unsigned int t_magic; /* magic number */
103 unsigned int t_log_res; /* amt of log space resvd */
104 unsigned int t_log_count; /* count for perm log res */
105 unsigned int t_blk_res; /* # of blocks resvd */
106 unsigned int t_blk_res_used; /* # of resvd blocks used */
107 unsigned int t_rtx_res; /* # of rt extents resvd */
108 unsigned int t_rtx_res_used; /* # of resvd rt extents used */
109 unsigned int t_flags; /* misc flags */
110 xfs_fsblock_t t_firstblock; /* first block allocated */
111 struct xlog_ticket *t_ticket; /* log mgr ticket */
112 struct xfs_mount *t_mountp; /* ptr to fs mount struct */
113 struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */
114 int64_t t_icount_delta; /* superblock icount change */
115 int64_t t_ifree_delta; /* superblock ifree change */
116 int64_t t_fdblocks_delta; /* superblock fdblocks chg */
117 int64_t t_res_fdblocks_delta; /* on-disk only chg */
118 int64_t t_frextents_delta;/* superblock freextents chg*/
119 int64_t t_res_frextents_delta; /* on-disk only chg */
120#if defined(DEBUG) || defined(XFS_WARN)
121 int64_t t_ag_freeblks_delta; /* debugging counter */
122 int64_t t_ag_flist_delta; /* debugging counter */
123 int64_t t_ag_btree_delta; /* debugging counter */
124#endif
125 int64_t t_dblocks_delta;/* superblock dblocks change */
126 int64_t t_agcount_delta;/* superblock agcount change */
127 int64_t t_imaxpct_delta;/* superblock imaxpct change */
128 int64_t t_rextsize_delta;/* superblock rextsize chg */
129 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */
130 int64_t t_rblocks_delta;/* superblock rblocks change */
131 int64_t t_rextents_delta;/* superblocks rextents chg */
132 int64_t t_rextslog_delta;/* superblocks rextslog chg */
133 struct list_head t_items; /* log item descriptors */
134 struct list_head t_busy; /* list of busy extents */
135 struct list_head t_dfops; /* deferred operations */
136 unsigned long t_pflags; /* saved process flags state */
137} xfs_trans_t;
138
139/*
140 * XFS transaction mechanism exported interfaces that are
141 * actually macros.
142 */
143#define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC)
144
145#if defined(DEBUG) || defined(XFS_WARN)
146#define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d)
147#define xfs_trans_agflist_delta(tp, d) ((tp)->t_ag_flist_delta += (int64_t)d)
148#define xfs_trans_agbtree_delta(tp, d) ((tp)->t_ag_btree_delta += (int64_t)d)
149#else
150#define xfs_trans_agblocks_delta(tp, d)
151#define xfs_trans_agflist_delta(tp, d)
152#define xfs_trans_agbtree_delta(tp, d)
153#endif
154
155/*
156 * XFS transaction mechanism exported interfaces.
157 */
158int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp,
159 uint blocks, uint rtextents, uint flags,
160 struct xfs_trans **tpp);
161int xfs_trans_alloc_empty(struct xfs_mount *mp,
162 struct xfs_trans **tpp);
163void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
164
165struct xfs_buf *xfs_trans_get_buf_map(struct xfs_trans *tp,
166 struct xfs_buftarg *target,
167 struct xfs_buf_map *map, int nmaps,
168 uint flags);
169
170static inline struct xfs_buf *
171xfs_trans_get_buf(
172 struct xfs_trans *tp,
173 struct xfs_buftarg *target,
174 xfs_daddr_t blkno,
175 int numblks,
176 uint flags)
177{
178 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
179 return xfs_trans_get_buf_map(tp, target, &map, 1, flags);
180}
181
182int xfs_trans_read_buf_map(struct xfs_mount *mp,
183 struct xfs_trans *tp,
184 struct xfs_buftarg *target,
185 struct xfs_buf_map *map, int nmaps,
186 xfs_buf_flags_t flags,
187 struct xfs_buf **bpp,
188 const struct xfs_buf_ops *ops);
189
190static inline int
191xfs_trans_read_buf(
192 struct xfs_mount *mp,
193 struct xfs_trans *tp,
194 struct xfs_buftarg *target,
195 xfs_daddr_t blkno,
196 int numblks,
197 xfs_buf_flags_t flags,
198 struct xfs_buf **bpp,
199 const struct xfs_buf_ops *ops)
200{
201 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
202 return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
203 flags, bpp, ops);
204}
205
206struct xfs_buf *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
207
208void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
209void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
210void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
211void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
212void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
213void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
214void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
215bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
216void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
217void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
218void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
219void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
220void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint,
221 uint);
222void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *);
223bool xfs_trans_buf_is_dirty(struct xfs_buf *bp);
224void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
225
226struct xfs_efd_log_item *xfs_trans_get_efd(struct xfs_trans *,
227 struct xfs_efi_log_item *,
228 uint);
229int xfs_trans_free_extent(struct xfs_trans *,
230 struct xfs_efd_log_item *, xfs_fsblock_t,
231 xfs_extlen_t,
232 const struct xfs_owner_info *,
233 bool);
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
248/* rmap updates */
249enum xfs_rmap_intent_type;
250
251struct xfs_rud_log_item *xfs_trans_get_rud(struct xfs_trans *tp,
252 struct xfs_rui_log_item *ruip);
253int xfs_trans_log_finish_rmap_update(struct xfs_trans *tp,
254 struct xfs_rud_log_item *rudp, enum xfs_rmap_intent_type type,
255 uint64_t owner, int whichfork, xfs_fileoff_t startoff,
256 xfs_fsblock_t startblock, xfs_filblks_t blockcount,
257 xfs_exntst_t state, struct xfs_btree_cur **pcur);
258
259/* refcount updates */
260enum xfs_refcount_intent_type;
261
262struct xfs_cud_log_item *xfs_trans_get_cud(struct xfs_trans *tp,
263 struct xfs_cui_log_item *cuip);
264int xfs_trans_log_finish_refcount_update(struct xfs_trans *tp,
265 struct xfs_cud_log_item *cudp,
266 enum xfs_refcount_intent_type type, xfs_fsblock_t startblock,
267 xfs_extlen_t blockcount, xfs_fsblock_t *new_fsb,
268 xfs_extlen_t *new_len, struct xfs_btree_cur **pcur);
269
270/* mapping updates */
271enum xfs_bmap_intent_type;
272
273struct xfs_bud_log_item *xfs_trans_get_bud(struct xfs_trans *tp,
274 struct xfs_bui_log_item *buip);
275int xfs_trans_log_finish_bmap_update(struct xfs_trans *tp,
276 struct xfs_bud_log_item *rudp, enum xfs_bmap_intent_type type,
277 struct xfs_inode *ip, int whichfork, xfs_fileoff_t startoff,
278 xfs_fsblock_t startblock, xfs_filblks_t *blockcount,
279 xfs_exntst_t state);
280
281#endif /* __XFS_TRANS_H__ */