1 /*
2 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #ifndef __XFS_TRANS_H__
19 #define __XFS_TRANS_H__
20
21 /* kernel only transaction subsystem defines */
22
23 struct xfs_buf;
24 struct xfs_buftarg;
25 struct xfs_efd_log_item;
26 struct xfs_efi_log_item;
27 struct xfs_inode;
28 struct xfs_item_ops;
29 struct xfs_log_iovec;
30 struct xfs_log_item_desc;
31 struct xfs_mount;
32 struct xfs_trans;
33 struct xfs_trans_res;
34 struct xfs_dquot_acct;
35 struct xfs_busy_extent;
36 struct xfs_rud_log_item;
37 struct xfs_rui_log_item;
38 struct xfs_btree_cur;
39 struct xfs_cui_log_item;
40 struct xfs_cud_log_item;
41 struct xfs_defer_ops;
42 struct xfs_bui_log_item;
43 struct xfs_bud_log_item;
44
45 typedef struct xfs_log_item {
46 struct list_head li_ail; /* AIL pointers */
47 xfs_lsn_t li_lsn; /* last on-disk lsn */
48 struct xfs_log_item_desc *li_desc; /* ptr to current desc*/
49 struct xfs_mount *li_mountp; /* ptr to fs mount */
50 struct xfs_ail *li_ailp; /* ptr to AIL */
51 uint li_type; /* item type */
52 uint li_flags; /* misc flags */
53 struct xfs_buf *li_buf; /* real buffer pointer */
54 struct xfs_log_item *li_bio_list; /* buffer item list */
55 void (*li_cb)(struct xfs_buf *,
56 struct xfs_log_item *);
57 /* buffer item iodone */
58 /* callback func */
59 const struct xfs_item_ops *li_ops; /* function list */
60
61 /* delayed logging */
62 struct list_head li_cil; /* CIL pointers */
63 struct xfs_log_vec *li_lv; /* active log vector */
64 struct xfs_log_vec *li_lv_shadow; /* standby vector */
65 xfs_lsn_t li_seq; /* CIL commit seq */
66 } xfs_log_item_t;
67
68 #define XFS_LI_IN_AIL 0x1
69 #define XFS_LI_ABORTED 0x2
70 #define XFS_LI_FAILED 0x4
71
72 #define XFS_LI_FLAGS \
73 { XFS_LI_IN_AIL, "IN_AIL" }, \
74 { XFS_LI_ABORTED, "ABORTED" }, \
75 { XFS_LI_FAILED, "FAILED" }
76
77 struct xfs_item_ops {
78 void (*iop_size)(xfs_log_item_t *, int *, int *);
79 void (*iop_format)(xfs_log_item_t *, struct xfs_log_vec *);
80 void (*iop_pin)(xfs_log_item_t *);
81 void (*iop_unpin)(xfs_log_item_t *, int remove);
82 uint (*iop_push)(struct xfs_log_item *, struct list_head *);
83 void (*iop_unlock)(xfs_log_item_t *);
84 xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
85 void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
86 void (*iop_error)(xfs_log_item_t *, xfs_buf_t *);
87 };
88
89 void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
90 int type, const struct xfs_item_ops *ops);
91
92 /*
93 * Return values for the iop_push() routines.
94 */
95 #define XFS_ITEM_SUCCESS 0
96 #define XFS_ITEM_PINNED 1
97 #define XFS_ITEM_LOCKED 2
98 #define XFS_ITEM_FLUSHING 3
99
100
101 /*
102 * This is the structure maintained for every active transaction.
103 */
104 typedef struct xfs_trans {
105 unsigned int t_magic; /* magic number */
106 unsigned int t_log_res; /* amt of log space resvd */
107 unsigned int t_log_count; /* count for perm log res */
108 unsigned int t_blk_res; /* # of blocks resvd */
109 unsigned int t_blk_res_used; /* # of resvd blocks used */
110 unsigned int t_rtx_res; /* # of rt extents resvd */
111 unsigned int t_rtx_res_used; /* # of resvd rt extents used */
112 struct xlog_ticket *t_ticket; /* log mgr ticket */
113 xfs_lsn_t t_lsn; /* log seq num of start of
114 * transaction. */
115 xfs_lsn_t t_commit_lsn; /* log seq num of end of
116 * transaction. */
117 struct xfs_mount *t_mountp; /* ptr to fs mount struct */
118 struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */
119 unsigned int t_flags; /* misc flags */
120 int64_t t_icount_delta; /* superblock icount change */
121 int64_t t_ifree_delta; /* superblock ifree change */
122 int64_t t_fdblocks_delta; /* superblock fdblocks chg */
123 int64_t t_res_fdblocks_delta; /* on-disk only chg */
124 int64_t t_frextents_delta;/* superblock freextents chg*/
125 int64_t t_res_frextents_delta; /* on-disk only chg */
126 #if defined(DEBUG) || defined(XFS_WARN)
127 int64_t t_ag_freeblks_delta; /* debugging counter */
128 int64_t t_ag_flist_delta; /* debugging counter */
129 int64_t t_ag_btree_delta; /* debugging counter */
130 #endif
131 int64_t t_dblocks_delta;/* superblock dblocks change */
132 int64_t t_agcount_delta;/* superblock agcount change */
133 int64_t t_imaxpct_delta;/* superblock imaxpct change */
134 int64_t t_rextsize_delta;/* superblock rextsize chg */
135 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */
136 int64_t t_rblocks_delta;/* superblock rblocks change */
137 int64_t t_rextents_delta;/* superblocks rextents chg */
138 int64_t t_rextslog_delta;/* superblocks rextslog chg */
139 struct list_head t_items; /* log item descriptors */
140 struct list_head t_busy; /* list of busy extents */
141 unsigned long t_pflags; /* saved process flags state */
142 } xfs_trans_t;
143
144 /*
145 * XFS transaction mechanism exported interfaces that are
146 * actually macros.
147 */
148 #define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC)
149
150 #if defined(DEBUG) || defined(XFS_WARN)
151 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d)
152 #define xfs_trans_agflist_delta(tp, d) ((tp)->t_ag_flist_delta += (int64_t)d)
153 #define xfs_trans_agbtree_delta(tp, d) ((tp)->t_ag_btree_delta += (int64_t)d)
154 #else
155 #define xfs_trans_agblocks_delta(tp, d)
156 #define xfs_trans_agflist_delta(tp, d)
157 #define xfs_trans_agbtree_delta(tp, d)
158 #endif
159
160 /*
161 * XFS transaction mechanism exported interfaces.
162 */
163 int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp,
164 uint blocks, uint rtextents, uint flags,
165 struct xfs_trans **tpp);
166 int xfs_trans_alloc_empty(struct xfs_mount *mp,
167 struct xfs_trans **tpp);
168 void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
169
170 struct xfs_buf *xfs_trans_get_buf_map(struct xfs_trans *tp,
171 struct xfs_buftarg *target,
172 struct xfs_buf_map *map, int nmaps,
173 uint flags);
174
175 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)176 xfs_trans_get_buf(
177 struct xfs_trans *tp,
178 struct xfs_buftarg *target,
179 xfs_daddr_t blkno,
180 int numblks,
181 uint flags)
182 {
183 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
184 return xfs_trans_get_buf_map(tp, target, &map, 1, flags);
185 }
186
187 int xfs_trans_read_buf_map(struct xfs_mount *mp,
188 struct xfs_trans *tp,
189 struct xfs_buftarg *target,
190 struct xfs_buf_map *map, int nmaps,
191 xfs_buf_flags_t flags,
192 struct xfs_buf **bpp,
193 const struct xfs_buf_ops *ops);
194
195 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)196 xfs_trans_read_buf(
197 struct xfs_mount *mp,
198 struct xfs_trans *tp,
199 struct xfs_buftarg *target,
200 xfs_daddr_t blkno,
201 int numblks,
202 xfs_buf_flags_t flags,
203 struct xfs_buf **bpp,
204 const struct xfs_buf_ops *ops)
205 {
206 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
207 return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
208 flags, bpp, ops);
209 }
210
211 struct xfs_buf *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
212
213 void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
214 void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
215 void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
216 void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
217 void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
218 void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
219 void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
220 bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
221 void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
222 void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
223 void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
224 void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
225 void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint,
226 uint);
227 void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *);
228 void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
229
230 void xfs_extent_free_init_defer_op(void);
231 struct xfs_efd_log_item *xfs_trans_get_efd(struct xfs_trans *,
232 struct xfs_efi_log_item *,
233 uint);
234 int xfs_trans_free_extent(struct xfs_trans *,
235 struct xfs_efd_log_item *, xfs_fsblock_t,
236 xfs_extlen_t, struct xfs_owner_info *);
237 int xfs_trans_commit(struct xfs_trans *);
238 int __xfs_trans_roll(struct xfs_trans **, struct xfs_inode *, int *);
239 int xfs_trans_roll(struct xfs_trans **, struct xfs_inode *);
240 void xfs_trans_cancel(xfs_trans_t *);
241 int xfs_trans_ail_init(struct xfs_mount *);
242 void xfs_trans_ail_destroy(struct xfs_mount *);
243
244 void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *,
245 enum xfs_blft);
246 void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
247 struct xfs_buf *src_bp);
248
249 extern kmem_zone_t *xfs_trans_zone;
250 extern kmem_zone_t *xfs_log_item_desc_zone;
251
252 /* rmap updates */
253 enum xfs_rmap_intent_type;
254
255 void xfs_rmap_update_init_defer_op(void);
256 struct xfs_rud_log_item *xfs_trans_get_rud(struct xfs_trans *tp,
257 struct xfs_rui_log_item *ruip);
258 int xfs_trans_log_finish_rmap_update(struct xfs_trans *tp,
259 struct xfs_rud_log_item *rudp, enum xfs_rmap_intent_type type,
260 __uint64_t owner, int whichfork, xfs_fileoff_t startoff,
261 xfs_fsblock_t startblock, xfs_filblks_t blockcount,
262 xfs_exntst_t state, struct xfs_btree_cur **pcur);
263
264 /* refcount updates */
265 enum xfs_refcount_intent_type;
266
267 void xfs_refcount_update_init_defer_op(void);
268 struct xfs_cud_log_item *xfs_trans_get_cud(struct xfs_trans *tp,
269 struct xfs_cui_log_item *cuip);
270 int xfs_trans_log_finish_refcount_update(struct xfs_trans *tp,
271 struct xfs_cud_log_item *cudp, struct xfs_defer_ops *dfops,
272 enum xfs_refcount_intent_type type, xfs_fsblock_t startblock,
273 xfs_extlen_t blockcount, xfs_fsblock_t *new_fsb,
274 xfs_extlen_t *new_len, struct xfs_btree_cur **pcur);
275
276 /* mapping updates */
277 enum xfs_bmap_intent_type;
278
279 void xfs_bmap_update_init_defer_op(void);
280 struct xfs_bud_log_item *xfs_trans_get_bud(struct xfs_trans *tp,
281 struct xfs_bui_log_item *buip);
282 int xfs_trans_log_finish_bmap_update(struct xfs_trans *tp,
283 struct xfs_bud_log_item *rudp, struct xfs_defer_ops *dfops,
284 enum xfs_bmap_intent_type type, struct xfs_inode *ip,
285 int whichfork, xfs_fileoff_t startoff, xfs_fsblock_t startblock,
286 xfs_filblks_t *blockcount, xfs_exntst_t state);
287
288 #endif /* __XFS_TRANS_H__ */
289