ia64/linux-2.6.18-xen.hg

view fs/jfs/jfs_txnmgr.h @ 524:7f8b544237bf

netfront: Allow netfront in domain 0.

This is useful if your physical network device is in a utility domain.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Apr 15 15:18:58 2008 +0100 (2008-04-15)
parents 831230e53067
children
line source
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
21 #include "jfs_logmgr.h"
23 /*
24 * Hide implementation of TxBlock and TxLock
25 */
26 #define tid_to_tblock(tid) (&TxBlock[tid])
28 #define lid_to_tlock(lid) (&TxLock[lid])
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 */
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.
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 };
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 */
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 */
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 */
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
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
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 */
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) */
167 #define TLOCKSHORT 20
168 #define TLOCKLONG 28
170 struct linelock {
171 lid_t next; /* 2: next linelock */
173 s8 maxcnt; /* 1: */
174 s8 index; /* 1: */
176 u16 flag; /* 2: */
177 u8 type; /* 1: */
178 u8 l2linesize; /* 1: log2 of linesize */
179 /* (8) */
181 struct lv lv[20]; /* 40: */
182 }; /* (48) */
184 #define dt_lock linelock
186 struct xtlock {
187 lid_t next; /* 2: */
189 s8 maxcnt; /* 1: */
190 s8 index; /* 1: */
192 u16 flag; /* 2: */
193 u8 type; /* 1: */
194 u8 l2linesize; /* 1: log2 of linesize */
195 /* (8) */
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) */
203 s32 pxdlock[8]; /* 32: */
204 }; /* (48) */
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: */
220 u8 maxcnt; /* 2: */
221 u8 index; /* 2: next free maplock index */
223 u16 flag; /* 2: */
224 u8 type; /* 1: */
225 u8 count; /* 1: number of pxd/xad */
226 /* (8) */
228 pxd_t pxd; /* 8: */
229 }; /* (16): */
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
243 #define pxd_lock maplock
245 struct xdlistlock {
246 lid_t next; /* 2: */
248 u8 maxcnt; /* 2: */
249 u8 index; /* 2: */
251 u16 flag; /* 2: */
252 u8 type; /* 1: */
253 u8 count; /* 1: number of pxd/xad */
254 /* (8) */
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): */
266 #define xdlist union64._xdlist
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 */
279 int nip; /* number of entries in iplist */
280 struct inode **iplist; /* list of pointers to inodes */
282 /* log record descriptor on 64-bit boundary */
283 struct lrd lrd; /* : log record descriptor */
284 };
286 /*
287 * external declarations
288 */
289 extern int jfs_tlocks_low;
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 */