[PATCH] ipcsem: remove superflous decrease variable from sys_semtimedop
[linux-2.6/sactl.git] / fs / jfs / jfs_txnmgr.h
blob59ad0f6b723186a6f4a1cb6d0eda5e038bebf936
1 /*
2 * Copyright (C) International Business Machines Corp., 2000-2004
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.
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
18 #ifndef _H_JFS_TXNMGR
19 #define _H_JFS_TXNMGR
21 #include "jfs_logmgr.h"
24 * Hide implementation of TxBlock and TxLock
26 #define tid_to_tblock(tid) (&TxBlock[tid])
28 #define lid_to_tlock(lid) (&TxLock[lid])
31 * transaction block
33 struct tblock {
35 * tblock and jbuf_t common area: struct logsyncblk
37 * the following 5 fields are the same as struct logsyncblk
38 * which is common to tblock and jbuf to form logsynclist
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 */
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 */
52 /* log management */
53 u32 logtid; /* log transaction id */
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.
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 */
72 extern struct tblock *TxBlock; /* transaction block table */
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 */
90 /* group commit flags tblk->flag: see jfs_logmgr.h */
93 * transaction lock
95 struct tlock {
96 lid_t next; /* 2: index next lockword on tid locklist
97 * next lockword on freelist
99 tid_t tid; /* 2: transaction id holding lock */
101 u16 flag; /* 2: lock control */
102 u16 type; /* 2: log type */
104 struct metapage *mp; /* 4/8: object page buffer locked */
105 struct inode *ip; /* 4/8: object */
106 /* (16) */
108 s16 lock[24]; /* 48: overlay area */
109 }; /* (64) */
111 extern struct tlock *TxLock; /* transaction lock table */
114 * tlock flag
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 /* freeLock state */
126 #define tlckFREELOCK 0x0008
127 #define tlckWRITEPAGE 0x0004
128 #define tlckFREEPAGE 0x0002
131 * tlock type
133 #define tlckTYPE 0xfe00
134 #define tlckINODE 0x8000
135 #define tlckXTREE 0x4000
136 #define tlckDTREE 0x2000
137 #define tlckMAP 0x1000
138 #define tlckEA 0x0800
139 #define tlckACL 0x0400
140 #define tlckDATA 0x0200
141 #define tlckBTROOT 0x0100
143 #define tlckOPERATION 0x00ff
144 #define tlckGROW 0x0001 /* file grow */
145 #define tlckREMOVE 0x0002 /* file delete */
146 #define tlckTRUNCATE 0x0004 /* file truncate */
147 #define tlckRELOCATE 0x0008 /* file/directory relocate */
148 #define tlckENTRY 0x0001 /* directory insert/delete */
149 #define tlckEXTEND 0x0002 /* directory extend in-line */
150 #define tlckSPLIT 0x0010 /* splited page */
151 #define tlckNEW 0x0020 /* new page from split */
152 #define tlckFREE 0x0040 /* free page */
153 #define tlckRELINK 0x0080 /* update sibling pointer */
156 * linelock for lmLog()
158 * note: linelock and its variations are overlaid
159 * at tlock.lock: watch for alignment;
161 struct lv {
162 u8 offset; /* 1: */
163 u8 length; /* 1: */
164 }; /* (2) */
166 #define TLOCKSHORT 20
167 #define TLOCKLONG 28
169 struct linelock {
170 lid_t next; /* 2: next linelock */
172 s8 maxcnt; /* 1: */
173 s8 index; /* 1: */
175 u16 flag; /* 2: */
176 u8 type; /* 1: */
177 u8 l2linesize; /* 1: log2 of linesize */
178 /* (8) */
180 struct lv lv[20]; /* 40: */
181 }; /* (48) */
183 #define dt_lock linelock
185 struct xtlock {
186 lid_t next; /* 2: */
188 s8 maxcnt; /* 1: */
189 s8 index; /* 1: */
191 u16 flag; /* 2: */
192 u8 type; /* 1: */
193 u8 l2linesize; /* 1: log2 of linesize */
194 /* (8) */
196 struct lv header; /* 2: */
197 struct lv lwm; /* 2: low water mark */
198 struct lv hwm; /* 2: high water mark */
199 struct lv twm; /* 2: */
200 /* (16) */
202 s32 pxdlock[8]; /* 32: */
203 }; /* (48) */
207 * maplock for txUpdateMap()
209 * note: maplock and its variations are overlaid
210 * at tlock.lock/linelock: watch for alignment;
211 * N.B. next field may be set by linelock, and should not
212 * be modified by maplock;
213 * N.B. index of the first pxdlock specifies index of next
214 * free maplock (i.e., number of maplock) in the tlock;
216 struct maplock {
217 lid_t next; /* 2: */
219 u8 maxcnt; /* 2: */
220 u8 index; /* 2: next free maplock index */
222 u16 flag; /* 2: */
223 u8 type; /* 1: */
224 u8 count; /* 1: number of pxd/xad */
225 /* (8) */
227 pxd_t pxd; /* 8: */
228 }; /* (16): */
230 /* maplock flag */
231 #define mlckALLOC 0x00f0
232 #define mlckALLOCXADLIST 0x0080
233 #define mlckALLOCPXDLIST 0x0040
234 #define mlckALLOCXAD 0x0020
235 #define mlckALLOCPXD 0x0010
236 #define mlckFREE 0x000f
237 #define mlckFREEXADLIST 0x0008
238 #define mlckFREEPXDLIST 0x0004
239 #define mlckFREEXAD 0x0002
240 #define mlckFREEPXD 0x0001
242 #define pxd_lock maplock
244 struct xdlistlock {
245 lid_t next; /* 2: */
247 u8 maxcnt; /* 2: */
248 u8 index; /* 2: */
250 u16 flag; /* 2: */
251 u8 type; /* 1: */
252 u8 count; /* 1: number of pxd/xad */
253 /* (8) */
256 * We need xdlist to be 64 bits (8 bytes), regardless of
257 * whether void * is 32 or 64 bits
259 union {
260 void *_xdlist; /* pxd/xad list */
261 s64 pad; /* 8: Force 64-bit xdlist size */
262 } union64;
263 }; /* (16): */
265 #define xdlist union64._xdlist
268 * commit
270 * parameter to the commit manager routines
272 struct commit {
273 tid_t tid; /* tid = index of tblock */
274 int flag; /* flags */
275 struct jfs_log *log; /* log */
276 struct super_block *sb; /* superblock */
278 int nip; /* number of entries in iplist */
279 struct inode **iplist; /* list of pointers to inodes */
281 /* log record descriptor on 64-bit boundary */
282 struct lrd lrd; /* : log record descriptor */
286 * external declarations
288 extern int jfs_tlocks_low;
290 extern int txInit(void);
291 extern void txExit(void);
292 extern struct tlock *txLock(tid_t, struct inode *, struct metapage *, int);
293 extern struct tlock *txMaplock(tid_t, struct inode *, int);
294 extern int txCommit(tid_t, int, struct inode **, int);
295 extern tid_t txBegin(struct super_block *, int);
296 extern void txBeginAnon(struct super_block *);
297 extern void txEnd(tid_t);
298 extern void txAbort(tid_t, int);
299 extern struct linelock *txLinelock(struct linelock *);
300 extern void txFreeMap(struct inode *, struct maplock *, struct tblock *, int);
301 extern void txEA(tid_t, struct inode *, dxd_t *, dxd_t *);
302 extern void txFreelock(struct inode *);
303 extern int lmLog(struct jfs_log *, struct tblock *, struct lrd *,
304 struct tlock *);
305 extern void txQuiesce(struct super_block *);
306 extern void txResume(struct super_block *);
307 extern void txLazyUnlock(struct tblock *);
308 extern int jfs_lazycommit(void *);
309 extern int jfs_sync(void *);
310 #endif /* _H_JFS_TXNMGR */