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1 | /* |
2 | * Copyright (C) International Business Machines Corp., 2000-2004 |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License as published by |
6 | * the Free Software Foundation; either version 2 of the License, or |
7 | * (at your option) any later version. |
8 | * |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
12 | * the 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 to the Free Software |
16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
17 | */ |
18 | #ifndef _H_JFS_TXNMGR |
19 | #define _H_JFS_TXNMGR |
20 | |
21 | #include "jfs_logmgr.h" |
22 | |
23 | /* |
24 | * Hide implementation of TxBlock and TxLock |
25 | */ |
26 | #define tid_to_tblock(tid) (&TxBlock[tid]) |
27 | |
28 | #define lid_to_tlock(lid) (&TxLock[lid]) |
29 | |
30 | /* |
31 | * transaction block |
32 | */ |
33 | struct tblock { |
34 | /* |
35 | * tblock and jbuf_t common area: struct logsyncblk |
36 | * |
37 | * the following 5 fields are the same as struct logsyncblk |
38 | * which is common to tblock and jbuf to form logsynclist |
39 | */ |
40 | u16 xflag; /* tx commit type */ |
41 | u16 flag; /* tx commit state */ |
42 | lid_t dummy; /* Must keep structures common */ |
43 | s32 lsn; /* recovery lsn */ |
44 | struct list_head synclist; /* logsynclist link */ |
45 | |
46 | /* lock management */ |
47 | struct super_block *sb; /* super block */ |
48 | lid_t next; /* index of first tlock of tid */ |
49 | lid_t last; /* index of last tlock of tid */ |
50 | wait_queue_head_t waitor; /* tids waiting on this tid */ |
51 | |
52 | /* log management */ |
53 | u32 logtid; /* log transaction id */ |
54 | |
55 | /* commit management */ |
56 | struct list_head cqueue; /* commit queue list */ |
57 | s32 clsn; /* commit lsn */ |
58 | struct lbuf *bp; |
59 | s32 pn; /* commit record log page number */ |
60 | s32 eor; /* commit record eor */ |
61 | wait_queue_head_t gcwait; /* group commit event list: |
62 | * ready transactions wait on this |
63 | * event for group commit completion. |
64 | */ |
65 | union { |
66 | struct inode *ip; /* inode being deleted */ |
67 | pxd_t ixpxd; /* pxd of inode extent for created inode */ |
68 | } u; |
69 | u32 ino; /* inode number being created */ |
70 | }; |
71 | |
72 | extern struct tblock *TxBlock; /* transaction block table */ |
73 | |
74 | /* commit flags: tblk->xflag */ |
75 | #define COMMIT_SYNC 0x0001 /* synchronous commit */ |
76 | #define COMMIT_FORCE 0x0002 /* force pageout at end of commit */ |
77 | #define COMMIT_FLUSH 0x0004 /* init flush at end of commit */ |
78 | #define COMMIT_MAP 0x00f0 |
79 | #define COMMIT_PMAP 0x0010 /* update pmap */ |
80 | #define COMMIT_WMAP 0x0020 /* update wmap */ |
81 | #define COMMIT_PWMAP 0x0040 /* update pwmap */ |
82 | #define COMMIT_FREE 0x0f00 |
83 | #define COMMIT_DELETE 0x0100 /* inode delete */ |
84 | #define COMMIT_TRUNCATE 0x0200 /* file truncation */ |
85 | #define COMMIT_CREATE 0x0400 /* inode create */ |
86 | #define COMMIT_LAZY 0x0800 /* lazy commit */ |
87 | #define COMMIT_PAGE 0x1000 /* Identifies element as metapage */ |
88 | #define COMMIT_INODE 0x2000 /* Identifies element as inode */ |
89 | |
90 | /* group commit flags tblk->flag: see jfs_logmgr.h */ |
91 | |
92 | /* |
93 | * transaction lock |
94 | */ |
95 | struct tlock { |
96 | lid_t next; /* 2: index next lockword on tid locklist |
97 | * next lockword on freelist |
98 | */ |
99 | tid_t tid; /* 2: transaction id holding lock */ |
100 | |
101 | u16 flag; /* 2: lock control */ |
102 | u16 type; /* 2: log type */ |
103 | |
104 | struct metapage *mp; /* 4/8: object page buffer locked */ |
105 | struct inode *ip; /* 4/8: object */ |
106 | /* (16) */ |
107 | |
108 | s16 lock[24]; /* 48: overlay area */ |
109 | }; /* (64) */ |
110 | |
111 | extern struct tlock *TxLock; /* transaction lock table */ |
112 | |
113 | /* |
114 | * tlock flag |
115 | */ |
116 | /* txLock state */ |
117 | #define tlckPAGELOCK 0x8000 |
118 | #define tlckINODELOCK 0x4000 |
119 | #define tlckLINELOCK 0x2000 |
120 | #define tlckINLINELOCK 0x1000 |
121 | /* lmLog state */ |
122 | #define tlckLOG 0x0800 |
123 | /* updateMap state */ |
124 | #define tlckUPDATEMAP 0x0080 |
125 | #define tlckDIRECTORY 0x0040 |
126 | /* freeLock state */ |
127 | #define tlckFREELOCK 0x0008 |
128 | #define tlckWRITEPAGE 0x0004 |
129 | #define tlckFREEPAGE 0x0002 |
130 | |
131 | /* |
132 | * tlock type |
133 | */ |
134 | #define tlckTYPE 0xfe00 |
135 | #define tlckINODE 0x8000 |
136 | #define tlckXTREE 0x4000 |
137 | #define tlckDTREE 0x2000 |
138 | #define tlckMAP 0x1000 |
139 | #define tlckEA 0x0800 |
140 | #define tlckACL 0x0400 |
141 | #define tlckDATA 0x0200 |
142 | #define tlckBTROOT 0x0100 |
143 | |
144 | #define tlckOPERATION 0x00ff |
145 | #define tlckGROW 0x0001 /* file grow */ |
146 | #define tlckREMOVE 0x0002 /* file delete */ |
147 | #define tlckTRUNCATE 0x0004 /* file truncate */ |
148 | #define tlckRELOCATE 0x0008 /* file/directory relocate */ |
149 | #define tlckENTRY 0x0001 /* directory insert/delete */ |
150 | #define tlckEXTEND 0x0002 /* directory extend in-line */ |
151 | #define tlckSPLIT 0x0010 /* splited page */ |
152 | #define tlckNEW 0x0020 /* new page from split */ |
153 | #define tlckFREE 0x0040 /* free page */ |
154 | #define tlckRELINK 0x0080 /* update sibling pointer */ |
155 | |
156 | /* |
157 | * linelock for lmLog() |
158 | * |
159 | * note: linelock and its variations are overlaid |
160 | * at tlock.lock: watch for alignment; |
161 | */ |
162 | struct lv { |
163 | u8 offset; /* 1: */ |
164 | u8 length; /* 1: */ |
165 | }; /* (2) */ |
166 | |
167 | #define TLOCKSHORT 20 |
168 | #define TLOCKLONG 28 |
169 | |
170 | struct linelock { |
171 | lid_t next; /* 2: next linelock */ |
172 | |
173 | s8 maxcnt; /* 1: */ |
174 | s8 index; /* 1: */ |
175 | |
176 | u16 flag; /* 2: */ |
177 | u8 type; /* 1: */ |
178 | u8 l2linesize; /* 1: log2 of linesize */ |
179 | /* (8) */ |
180 | |
181 | struct lv lv[20]; /* 40: */ |
182 | }; /* (48) */ |
183 | |
184 | #define dt_lock linelock |
185 | |
186 | struct xtlock { |
187 | lid_t next; /* 2: */ |
188 | |
189 | s8 maxcnt; /* 1: */ |
190 | s8 index; /* 1: */ |
191 | |
192 | u16 flag; /* 2: */ |
193 | u8 type; /* 1: */ |
194 | u8 l2linesize; /* 1: log2 of linesize */ |
195 | /* (8) */ |
196 | |
197 | struct lv header; /* 2: */ |
198 | struct lv lwm; /* 2: low water mark */ |
199 | struct lv hwm; /* 2: high water mark */ |
200 | struct lv twm; /* 2: */ |
201 | /* (16) */ |
202 | |
203 | s32 pxdlock[8]; /* 32: */ |
204 | }; /* (48) */ |
205 | |
206 | |
207 | /* |
208 | * maplock for txUpdateMap() |
209 | * |
210 | * note: maplock and its variations are overlaid |
211 | * at tlock.lock/linelock: watch for alignment; |
212 | * N.B. next field may be set by linelock, and should not |
213 | * be modified by maplock; |
214 | * N.B. index of the first pxdlock specifies index of next |
215 | * free maplock (i.e., number of maplock) in the tlock; |
216 | */ |
217 | struct maplock { |
218 | lid_t next; /* 2: */ |
219 | |
220 | u8 maxcnt; /* 2: */ |
221 | u8 index; /* 2: next free maplock index */ |
222 | |
223 | u16 flag; /* 2: */ |
224 | u8 type; /* 1: */ |
225 | u8 count; /* 1: number of pxd/xad */ |
226 | /* (8) */ |
227 | |
228 | pxd_t pxd; /* 8: */ |
229 | }; /* (16): */ |
230 | |
231 | /* maplock flag */ |
232 | #define mlckALLOC 0x00f0 |
233 | #define mlckALLOCXADLIST 0x0080 |
234 | #define mlckALLOCPXDLIST 0x0040 |
235 | #define mlckALLOCXAD 0x0020 |
236 | #define mlckALLOCPXD 0x0010 |
237 | #define mlckFREE 0x000f |
238 | #define mlckFREEXADLIST 0x0008 |
239 | #define mlckFREEPXDLIST 0x0004 |
240 | #define mlckFREEXAD 0x0002 |
241 | #define mlckFREEPXD 0x0001 |
242 | |
243 | #define pxd_lock maplock |
244 | |
245 | struct xdlistlock { |
246 | lid_t next; /* 2: */ |
247 | |
248 | u8 maxcnt; /* 2: */ |
249 | u8 index; /* 2: */ |
250 | |
251 | u16 flag; /* 2: */ |
252 | u8 type; /* 1: */ |
253 | u8 count; /* 1: number of pxd/xad */ |
254 | /* (8) */ |
255 | |
256 | /* |
257 | * We need xdlist to be 64 bits (8 bytes), regardless of |
258 | * whether void * is 32 or 64 bits |
259 | */ |
260 | union { |
261 | void *_xdlist; /* pxd/xad list */ |
262 | s64 pad; /* 8: Force 64-bit xdlist size */ |
263 | } union64; |
264 | }; /* (16): */ |
265 | |
266 | #define xdlist union64._xdlist |
267 | |
268 | /* |
269 | * commit |
270 | * |
271 | * parameter to the commit manager routines |
272 | */ |
273 | struct commit { |
274 | tid_t tid; /* tid = index of tblock */ |
275 | int flag; /* flags */ |
276 | struct jfs_log *log; /* log */ |
277 | struct super_block *sb; /* superblock */ |
278 | |
279 | int nip; /* number of entries in iplist */ |
280 | struct inode **iplist; /* list of pointers to inodes */ |
281 | |
282 | /* log record descriptor on 64-bit boundary */ |
283 | struct lrd lrd; /* : log record descriptor */ |
284 | }; |
285 | |
286 | /* |
287 | * external declarations |
288 | */ |
289 | extern int jfs_tlocks_low; |
290 | |
291 | extern int txInit(void); |
292 | extern void txExit(void); |
293 | extern struct tlock *txLock(tid_t, struct inode *, struct metapage *, int); |
294 | extern struct tlock *txMaplock(tid_t, struct inode *, int); |
295 | extern int txCommit(tid_t, int, struct inode **, int); |
296 | extern tid_t txBegin(struct super_block *, int); |
297 | extern void txBeginAnon(struct super_block *); |
298 | extern void txEnd(tid_t); |
299 | extern void txAbort(tid_t, int); |
300 | extern struct linelock *txLinelock(struct linelock *); |
301 | extern void txFreeMap(struct inode *, struct maplock *, struct tblock *, int); |
302 | extern void txEA(tid_t, struct inode *, dxd_t *, dxd_t *); |
303 | extern void txFreelock(struct inode *); |
304 | extern int lmLog(struct jfs_log *, struct tblock *, struct lrd *, |
305 | struct tlock *); |
306 | extern void txQuiesce(struct super_block *); |
307 | extern void txResume(struct super_block *); |
308 | extern void txLazyUnlock(struct tblock *); |
309 | extern int jfs_lazycommit(void *); |
310 | extern int jfs_sync(void *); |
311 | #endif /* _H_JFS_TXNMGR */ |
312 |
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