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
11 struct xfs_buf;
12 struct xfs_buftarg;
13 struct xfs_efd_log_item;
14 struct xfs_efi_log_item;
15 struct xfs_inode;
16 struct xfs_item_ops;
17 struct xfs_log_iovec;
18 struct xfs_mount;
19 struct xfs_trans;
20 struct xfs_trans_res;
21 struct xfs_dquot_acct;
22 struct xfs_rud_log_item;
23 struct xfs_rui_log_item;
24 struct xfs_btree_cur;
25 struct xfs_cui_log_item;
26 struct xfs_cud_log_item;
27 struct xfs_bui_log_item;
28 struct xfs_bud_log_item;
29
30 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 };
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
69 struct 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
88 void 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 */
108 typedef 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 */
165 int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp,
166 uint blocks, uint rtextents, uint flags,
167 struct xfs_trans **tpp);
168 int xfs_trans_alloc_empty(struct xfs_mount *mp,
169 struct xfs_trans **tpp);
170 void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
171
172 struct 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
177 static inline struct xfs_buf *
xfs_trans_get_buf(struct xfs_trans * tp,struct xfs_buftarg * target,xfs_daddr_t blkno,int numblks,uint flags)178 xfs_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
189 int 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
197 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)198 xfs_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
213 struct xfs_buf *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *);
214
215 void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
216 void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
217 void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
218 void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
219 void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
220 void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
221 void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
222 bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
223 void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
224 void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
225 void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
226 void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
227 void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint,
228 uint);
229 void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *);
230 bool xfs_trans_buf_is_dirty(struct xfs_buf *bp);
231 void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
232
233 int xfs_trans_commit(struct xfs_trans *);
234 int xfs_trans_roll(struct xfs_trans **);
235 int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *);
236 void xfs_trans_cancel(xfs_trans_t *);
237 int xfs_trans_ail_init(struct xfs_mount *);
238 void xfs_trans_ail_destroy(struct xfs_mount *);
239
240 void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *,
241 enum xfs_blft);
242 void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
243 struct xfs_buf *src_bp);
244
245 extern kmem_zone_t *xfs_trans_zone;
246
247 #endif /* __XFS_TRANS_H__ */
248