1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Copyright (C) International Business Machines Corp., 2000-2004
4 */
5 #ifndef _H_JFS_TXNMGR
6 #define _H_JFS_TXNMGR
7
8 #include "jfs_logmgr.h"
9
10 /*
11 * Hide implementation of TxBlock and TxLock
12 */
13 #define tid_to_tblock(tid) (&TxBlock[tid])
14
15 #define lid_to_tlock(lid) (&TxLock[lid])
16
17 /*
18 * transaction block
19 */
20 struct tblock {
21 /*
22 * tblock and jbuf_t common area: struct logsyncblk
23 *
24 * the following 5 fields are the same as struct logsyncblk
25 * which is common to tblock and jbuf to form logsynclist
26 */
27 u16 xflag; /* tx commit type */
28 u16 flag; /* tx commit state */
29 lid_t dummy; /* Must keep structures common */
30 s32 lsn; /* recovery lsn */
31 struct list_head synclist; /* logsynclist link */
32
33 /* lock management */
34 struct super_block *sb; /* super block */
35 lid_t next; /* index of first tlock of tid */
36 lid_t last; /* index of last tlock of tid */
37 wait_queue_head_t waitor; /* tids waiting on this tid */
38
39 /* log management */
40 u32 logtid; /* log transaction id */
41
42 /* commit management */
43 struct list_head cqueue; /* commit queue list */
44 s32 clsn; /* commit lsn */
45 struct lbuf *bp;
46 s32 pn; /* commit record log page number */
47 s32 eor; /* commit record eor */
48 wait_queue_head_t gcwait; /* group commit event list:
49 * ready transactions wait on this
50 * event for group commit completion.
51 */
52 union {
53 struct inode *ip; /* inode being deleted */
54 pxd_t ixpxd; /* pxd of inode extent for created inode */
55 } u;
56 u32 ino; /* inode number being created */
57 };
58
59 extern struct tblock *TxBlock; /* transaction block table */
60
61 /* commit flags: tblk->xflag */
62 #define COMMIT_SYNC 0x0001 /* synchronous commit */
63 #define COMMIT_FORCE 0x0002 /* force pageout at end of commit */
64 #define COMMIT_FLUSH 0x0004 /* init flush at end of commit */
65 #define COMMIT_MAP 0x00f0
66 #define COMMIT_PMAP 0x0010 /* update pmap */
67 #define COMMIT_WMAP 0x0020 /* update wmap */
68 #define COMMIT_PWMAP 0x0040 /* update pwmap */
69 #define COMMIT_FREE 0x0f00
70 #define COMMIT_DELETE 0x0100 /* inode delete */
71 #define COMMIT_TRUNCATE 0x0200 /* file truncation */
72 #define COMMIT_CREATE 0x0400 /* inode create */
73 #define COMMIT_LAZY 0x0800 /* lazy commit */
74 #define COMMIT_PAGE 0x1000 /* Identifies element as metapage */
75 #define COMMIT_INODE 0x2000 /* Identifies element as inode */
76
77 /* group commit flags tblk->flag: see jfs_logmgr.h */
78
79 /*
80 * transaction lock
81 */
82 struct tlock {
83 lid_t next; /* 2: index next lockword on tid locklist
84 * next lockword on freelist
85 */
86 tid_t tid; /* 2: transaction id holding lock */
87
88 u16 flag; /* 2: lock control */
89 u16 type; /* 2: log type */
90
91 struct metapage *mp; /* 4/8: object page buffer locked */
92 struct inode *ip; /* 4/8: object */
93 /* (16) */
94
95 s16 lock[24]; /* 48: overlay area */
96 }; /* (64) */
97
98 extern struct tlock *TxLock; /* transaction lock table */
99
100 /*
101 * tlock flag
102 */
103 /* txLock state */
104 #define tlckPAGELOCK 0x8000
105 #define tlckINODELOCK 0x4000
106 #define tlckLINELOCK 0x2000
107 #define tlckINLINELOCK 0x1000
108 /* lmLog state */
109 #define tlckLOG 0x0800
110 /* updateMap state */
111 #define tlckUPDATEMAP 0x0080
112 #define tlckDIRECTORY 0x0040
113 /* freeLock state */
114 #define tlckFREELOCK 0x0008
115 #define tlckWRITEPAGE 0x0004
116 #define tlckFREEPAGE 0x0002
117
118 /*
119 * tlock type
120 */
121 #define tlckTYPE 0xfe00
122 #define tlckINODE 0x8000
123 #define tlckXTREE 0x4000
124 #define tlckDTREE 0x2000
125 #define tlckMAP 0x1000
126 #define tlckEA 0x0800
127 #define tlckACL 0x0400
128 #define tlckDATA 0x0200
129 #define tlckBTROOT 0x0100
130
131 #define tlckOPERATION 0x00ff
132 #define tlckGROW 0x0001 /* file grow */
133 #define tlckREMOVE 0x0002 /* file delete */
134 #define tlckTRUNCATE 0x0004 /* file truncate */
135 #define tlckRELOCATE 0x0008 /* file/directory relocate */
136 #define tlckENTRY 0x0001 /* directory insert/delete */
137 #define tlckEXTEND 0x0002 /* directory extend in-line */
138 #define tlckSPLIT 0x0010 /* splited page */
139 #define tlckNEW 0x0020 /* new page from split */
140 #define tlckFREE 0x0040 /* free page */
141 #define tlckRELINK 0x0080 /* update sibling pointer */
142
143 /*
144 * linelock for lmLog()
145 *
146 * note: linelock and its variations are overlaid
147 * at tlock.lock: watch for alignment;
148 */
149 struct lv {
150 u8 offset; /* 1: */
151 u8 length; /* 1: */
152 }; /* (2) */
153
154 #define TLOCKSHORT 20
155 #define TLOCKLONG 28
156
157 struct linelock {
158 lid_t next; /* 2: next linelock */
159
160 s8 maxcnt; /* 1: */
161 s8 index; /* 1: */
162
163 u16 flag; /* 2: */
164 u8 type; /* 1: */
165 u8 l2linesize; /* 1: log2 of linesize */
166 /* (8) */
167
168 struct lv lv[20]; /* 40: */
169 }; /* (48) */
170
171 #define dt_lock linelock
172
173 struct xtlock {
174 lid_t next; /* 2: */
175
176 s8 maxcnt; /* 1: */
177 s8 index; /* 1: */
178
179 u16 flag; /* 2: */
180 u8 type; /* 1: */
181 u8 l2linesize; /* 1: log2 of linesize */
182 /* (8) */
183
184 struct lv header; /* 2: */
185 struct lv lwm; /* 2: low water mark */
186 struct lv hwm; /* 2: high water mark */
187 struct lv twm; /* 2: */
188 /* (16) */
189
190 s32 pxdlock[8]; /* 32: */
191 }; /* (48) */
192
193
194 /*
195 * maplock for txUpdateMap()
196 *
197 * note: maplock and its variations are overlaid
198 * at tlock.lock/linelock: watch for alignment;
199 * N.B. next field may be set by linelock, and should not
200 * be modified by maplock;
201 * N.B. index of the first pxdlock specifies index of next
202 * free maplock (i.e., number of maplock) in the tlock;
203 */
204 struct maplock {
205 lid_t next; /* 2: */
206
207 u8 maxcnt; /* 2: */
208 u8 index; /* 2: next free maplock index */
209
210 u16 flag; /* 2: */
211 u8 type; /* 1: */
212 u8 count; /* 1: number of pxd/xad */
213 /* (8) */
214
215 pxd_t pxd; /* 8: */
216 }; /* (16): */
217
218 /* maplock flag */
219 #define mlckALLOC 0x00f0
220 #define mlckALLOCXADLIST 0x0080
221 #define mlckALLOCPXDLIST 0x0040
222 #define mlckALLOCXAD 0x0020
223 #define mlckALLOCPXD 0x0010
224 #define mlckFREE 0x000f
225 #define mlckFREEXADLIST 0x0008
226 #define mlckFREEPXDLIST 0x0004
227 #define mlckFREEXAD 0x0002
228 #define mlckFREEPXD 0x0001
229
230 #define pxd_lock maplock
231
232 struct xdlistlock {
233 lid_t next; /* 2: */
234
235 u8 maxcnt; /* 2: */
236 u8 index; /* 2: */
237
238 u16 flag; /* 2: */
239 u8 type; /* 1: */
240 u8 count; /* 1: number of pxd/xad */
241 /* (8) */
242
243 /*
244 * We need xdlist to be 64 bits (8 bytes), regardless of
245 * whether void * is 32 or 64 bits
246 */
247 union {
248 void *_xdlist; /* pxd/xad list */
249 s64 pad; /* 8: Force 64-bit xdlist size */
250 } union64;
251 }; /* (16): */
252
253 #define xdlist union64._xdlist
254
255 /*
256 * commit
257 *
258 * parameter to the commit manager routines
259 */
260 struct commit {
261 tid_t tid; /* tid = index of tblock */
262 int flag; /* flags */
263 struct jfs_log *log; /* log */
264 struct super_block *sb; /* superblock */
265
266 int nip; /* number of entries in iplist */
267 struct inode **iplist; /* list of pointers to inodes */
268
269 /* log record descriptor on 64-bit boundary */
270 struct lrd lrd; /* : log record descriptor */
271 };
272
273 /*
274 * external declarations
275 */
276 extern int jfs_tlocks_low;
277
278 extern int txInit(void);
279 extern void txExit(void);
280 extern struct tlock *txLock(tid_t, struct inode *, struct metapage *, int);
281 extern struct tlock *txMaplock(tid_t, struct inode *, int);
282 extern int txCommit(tid_t, int, struct inode **, int);
283 extern tid_t txBegin(struct super_block *, int);
284 extern void txBeginAnon(struct super_block *);
285 extern void txEnd(tid_t);
286 extern void txAbort(tid_t, int);
287 extern struct linelock *txLinelock(struct linelock *);
288 extern void txFreeMap(struct inode *, struct maplock *, struct tblock *, int);
289 extern void txEA(tid_t, struct inode *, dxd_t *, dxd_t *);
290 extern void txFreelock(struct inode *);
291 extern int lmLog(struct jfs_log *, struct tblock *, struct lrd *,
292 struct tlock *);
293 extern void txQuiesce(struct super_block *);
294 extern void txResume(struct super_block *);
295 extern void txLazyUnlock(struct tblock *);
296 extern int jfs_lazycommit(void *);
297 extern int jfs_sync(void *);
298 #endif /* _H_JFS_TXNMGR */
299
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