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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