- 根目录:
- fs
- jfs
- jfs_txnmgr.h
/*
* Copyright (C) International Business Machines Corp., 2000-2004
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _H_JFS_TXNMGR
#define _H_JFS_TXNMGR
#include "jfs_logmgr.h"
/*
* Hide implementation of TxBlock and TxLock
*/
#define tid_to_tblock(tid) (&TxBlock[tid])
#define lid_to_tlock(lid) (&TxLock[lid])
/*
* transaction block
*/
struct tblock {
/*
* tblock and jbuf_t common area: struct logsyncblk
*
* the following 5 fields are the same as struct logsyncblk
* which is common to tblock and jbuf to form logsynclist
*/
u16 xflag; /* tx commit type */
u16 flag; /* tx commit state */
lid_t dummy; /* Must keep structures common */
s32 lsn; /* recovery lsn */
struct list_head synclist; /* logsynclist link */
/* lock management */
struct super_block *sb; /* super block */
lid_t next; /* index of first tlock of tid */
lid_t last; /* index of last tlock of tid */
wait_queue_head_t waitor; /* tids waiting on this tid */
/* log management */
u32 logtid; /* log transaction id */
/* commit management */
struct list_head cqueue; /* commit queue list */
s32 clsn; /* commit lsn */
struct lbuf *bp;
s32 pn; /* commit record log page number */
s32 eor; /* commit record eor */
wait_queue_head_t gcwait; /* group commit event list:
* ready transactions wait on this
* event for group commit completion.
*/
union {
struct inode *ip; /* inode being deleted */
pxd_t ixpxd; /* pxd of inode extent for created inode */
} u;
u32 ino; /* inode number being created */
};
extern struct tblock *TxBlock; /* transaction block table */
/* commit flags: tblk->xflag */
#define COMMIT_SYNC 0x0001 /* synchronous commit */
#define COMMIT_FORCE 0x0002 /* force pageout at end of commit */
#define COMMIT_FLUSH 0x0004 /* init flush at end of commit */
#define COMMIT_MAP 0x00f0
#define COMMIT_PMAP 0x0010 /* update pmap */
#define COMMIT_WMAP 0x0020 /* update wmap */
#define COMMIT_PWMAP 0x0040 /* update pwmap */
#define COMMIT_FREE 0x0f00
#define COMMIT_DELETE 0x0100 /* inode delete */
#define COMMIT_TRUNCATE 0x0200 /* file truncation */
#define COMMIT_CREATE 0x0400 /* inode create */
#define COMMIT_LAZY 0x0800 /* lazy commit */
#define COMMIT_PAGE 0x1000 /* Identifies element as metapage */
#define COMMIT_INODE 0x2000 /* Identifies element as inode */
/* group commit flags tblk->flag: see jfs_logmgr.h */
/*
* transaction lock
*/
struct tlock {
lid_t next; /* 2: index next lockword on tid locklist
* next lockword on freelist
*/
tid_t tid; /* 2: transaction id holding lock */
u16 flag; /* 2: lock control */
u16 type; /* 2: log type */
struct metapage *mp; /* 4/8: object page buffer locked */
struct inode *ip; /* 4/8: object */
/* (16) */
s16 lock[24]; /* 48: overlay area */
}; /* (64) */
extern struct tlock *TxLock; /* transaction lock table */
/*
* tlock flag
*/
/* txLock state */
#define tlckPAGELOCK 0x8000
#define tlckINODELOCK 0x4000
#define tlckLINELOCK 0x2000
#define tlckINLINELOCK 0x1000
/* lmLog state */
#define tlckLOG 0x0800
/* updateMap state */
#define tlckUPDATEMAP 0x0080
#define tlckDIRECTORY 0x0040
/* freeLock state */
#define tlckFREELOCK 0x0008
#define tlckWRITEPAGE 0x0004
#define tlckFREEPAGE 0x0002
/*
* tlock type
*/
#define tlckTYPE 0xfe00
#define tlckINODE 0x8000
#define tlckXTREE 0x4000
#define tlckDTREE 0x2000
#define tlckMAP 0x1000
#define tlckEA 0x0800
#define tlckACL 0x0400
#define tlckDATA 0x0200
#define tlckBTROOT 0x0100
#define tlckOPERATION 0x00ff
#define tlckGROW 0x0001 /* file grow */
#define tlckREMOVE 0x0002 /* file delete */
#define tlckTRUNCATE 0x0004 /* file truncate */
#define tlckRELOCATE 0x0008 /* file/directory relocate */
#define tlckENTRY 0x0001 /* directory insert/delete */
#define tlckEXTEND 0x0002 /* directory extend in-line */
#define tlckSPLIT 0x0010 /* splited page */
#define tlckNEW 0x0020 /* new page from split */
#define tlckFREE 0x0040 /* free page */
#define tlckRELINK 0x0080 /* update sibling pointer */
/*
* linelock for lmLog()
*
* note: linelock and its variations are overlaid
* at tlock.lock: watch for alignment;
*/
struct lv {
u8 offset; /* 1: */
u8 length; /* 1: */
}; /* (2) */
#define TLOCKSHORT 20
#define TLOCKLONG 28
struct linelock {
lid_t next; /* 2: next linelock */
s8 maxcnt; /* 1: */
s8 index; /* 1: */
u16 flag; /* 2: */
u8 type; /* 1: */
u8 l2linesize; /* 1: log2 of linesize */
/* (8) */
struct lv lv[20]; /* 40: */
}; /* (48) */
#define dt_lock linelock
struct xtlock {
lid_t next; /* 2: */
s8 maxcnt; /* 1: */
s8 index; /* 1: */
u16 flag; /* 2: */
u8 type; /* 1: */
u8 l2linesize; /* 1: log2 of linesize */
/* (8) */
struct lv header; /* 2: */
struct lv lwm; /* 2: low water mark */
struct lv hwm; /* 2: high water mark */
struct lv twm; /* 2: */
/* (16) */
s32 pxdlock[8]; /* 32: */
}; /* (48) */
/*
* maplock for txUpdateMap()
*
* note: maplock and its variations are overlaid
* at tlock.lock/linelock: watch for alignment;
* N.B. next field may be set by linelock, and should not
* be modified by maplock;
* N.B. index of the first pxdlock specifies index of next
* free maplock (i.e., number of maplock) in the tlock;
*/
struct maplock {
lid_t next; /* 2: */
u8 maxcnt; /* 2: */
u8 index; /* 2: next free maplock index */
u16 flag; /* 2: */
u8 type; /* 1: */
u8 count; /* 1: number of pxd/xad */
/* (8) */
pxd_t pxd; /* 8: */
}; /* (16): */
/* maplock flag */
#define mlckALLOC 0x00f0
#define mlckALLOCXADLIST 0x0080
#define mlckALLOCPXDLIST 0x0040
#define mlckALLOCXAD 0x0020
#define mlckALLOCPXD 0x0010
#define mlckFREE 0x000f
#define mlckFREEXADLIST 0x0008
#define mlckFREEPXDLIST 0x0004
#define mlckFREEXAD 0x0002
#define mlckFREEPXD 0x0001
#define pxd_lock maplock
struct xdlistlock {
lid_t next; /* 2: */
u8 maxcnt; /* 2: */
u8 index; /* 2: */
u16 flag; /* 2: */
u8 type; /* 1: */
u8 count; /* 1: number of pxd/xad */
/* (8) */
/*
* We need xdlist to be 64 bits (8 bytes), regardless of
* whether void * is 32 or 64 bits
*/
union {
void *_xdlist; /* pxd/xad list */
s64 pad; /* 8: Force 64-bit xdlist size */
} union64;
}; /* (16): */
#define xdlist union64._xdlist
/*
* commit
*
* parameter to the commit manager routines
*/
struct commit {
tid_t tid; /* tid = index of tblock */
int flag; /* flags */
struct jfs_log *log; /* log */
struct super_block *sb; /* superblock */
int nip; /* number of entries in iplist */
struct inode **iplist; /* list of pointers to inodes */
/* log record descriptor on 64-bit boundary */
struct lrd lrd; /* : log record descriptor */
};
/*
* external declarations
*/
extern int jfs_tlocks_low;
extern int txInit(void);
extern void txExit(void);
extern struct tlock *txLock(tid_t, struct inode *, struct metapage *, int);
extern struct tlock *txMaplock(tid_t, struct inode *, int);
extern int txCommit(tid_t, int, struct inode **, int);
extern tid_t txBegin(struct super_block *, int);
extern void txBeginAnon(struct super_block *);
extern void txEnd(tid_t);
extern void txAbort(tid_t, int);
extern struct linelock *txLinelock(struct linelock *);
extern void txFreeMap(struct inode *, struct maplock *, struct tblock *, int);
extern void txEA(tid_t, struct inode *, dxd_t *, dxd_t *);
extern void txFreelock(struct inode *);
extern int lmLog(struct jfs_log *, struct tblock *, struct lrd *,
struct tlock *);
extern void txQuiesce(struct super_block *);
extern void txResume(struct super_block *);
extern void txLazyUnlock(struct tblock *);
extern int jfs_lazycommit(void *);
extern int jfs_sync(void *);
#endif /* _H_JFS_TXNMGR */