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