3063 lines
74 KiB
C
Executable file
3063 lines
74 KiB
C
Executable file
/*
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* Copyright (C) International Business Machines Corp., 2000-2005
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* Portions Copyright (C) Christoph Hellwig, 2001-2002
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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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/*
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* jfs_txnmgr.c: transaction manager
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*
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* notes:
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* transaction starts with txBegin() and ends with txCommit()
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* or txAbort().
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*
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* tlock is acquired at the time of update;
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* (obviate scan at commit time for xtree and dtree)
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* tlock and mp points to each other;
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* (no hashlist for mp -> tlock).
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*
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* special cases:
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* tlock on in-memory inode:
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* in-place tlock in the in-memory inode itself;
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* converted to page lock by iWrite() at commit time.
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*
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* tlock during write()/mmap() under anonymous transaction (tid = 0):
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* transferred (?) to transaction at commit time.
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*
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* use the page itself to update allocation maps
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* (obviate intermediate replication of allocation/deallocation data)
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* hold on to mp+lock thru update of maps
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*/
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#include <linux/fs.h>
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#include <linux/vmalloc.h>
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#include <linux/completion.h>
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#include <linux/freezer.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/kthread.h>
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#include <linux/seq_file.h>
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#include "jfs_incore.h"
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#include "jfs_inode.h"
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#include "jfs_filsys.h"
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#include "jfs_metapage.h"
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#include "jfs_dinode.h"
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#include "jfs_imap.h"
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#include "jfs_dmap.h"
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#include "jfs_superblock.h"
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#include "jfs_debug.h"
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/*
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* transaction management structures
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*/
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static struct {
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int freetid; /* index of a free tid structure */
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int freelock; /* index first free lock word */
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wait_queue_head_t freewait; /* eventlist of free tblock */
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wait_queue_head_t freelockwait; /* eventlist of free tlock */
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wait_queue_head_t lowlockwait; /* eventlist of ample tlocks */
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int tlocksInUse; /* Number of tlocks in use */
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spinlock_t LazyLock; /* synchronize sync_queue & unlock_queue */
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/* struct tblock *sync_queue; * Transactions waiting for data sync */
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struct list_head unlock_queue; /* Txns waiting to be released */
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struct list_head anon_list; /* inodes having anonymous txns */
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struct list_head anon_list2; /* inodes having anonymous txns
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that couldn't be sync'ed */
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} TxAnchor;
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int jfs_tlocks_low; /* Indicates low number of available tlocks */
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#ifdef CONFIG_JFS_STATISTICS
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static struct {
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uint txBegin;
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uint txBegin_barrier;
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uint txBegin_lockslow;
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uint txBegin_freetid;
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uint txBeginAnon;
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uint txBeginAnon_barrier;
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uint txBeginAnon_lockslow;
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uint txLockAlloc;
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uint txLockAlloc_freelock;
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} TxStat;
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#endif
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static int nTxBlock = -1; /* number of transaction blocks */
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module_param(nTxBlock, int, 0);
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MODULE_PARM_DESC(nTxBlock,
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"Number of transaction blocks (max:65536)");
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static int nTxLock = -1; /* number of transaction locks */
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module_param(nTxLock, int, 0);
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MODULE_PARM_DESC(nTxLock,
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"Number of transaction locks (max:65536)");
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struct tblock *TxBlock; /* transaction block table */
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static int TxLockLWM; /* Low water mark for number of txLocks used */
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static int TxLockHWM; /* High water mark for number of txLocks used */
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static int TxLockVHWM; /* Very High water mark */
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struct tlock *TxLock; /* transaction lock table */
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/*
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* transaction management lock
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*/
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static DEFINE_SPINLOCK(jfsTxnLock);
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#define TXN_LOCK() spin_lock(&jfsTxnLock)
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#define TXN_UNLOCK() spin_unlock(&jfsTxnLock)
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#define LAZY_LOCK_INIT() spin_lock_init(&TxAnchor.LazyLock);
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#define LAZY_LOCK(flags) spin_lock_irqsave(&TxAnchor.LazyLock, flags)
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#define LAZY_UNLOCK(flags) spin_unlock_irqrestore(&TxAnchor.LazyLock, flags)
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static DECLARE_WAIT_QUEUE_HEAD(jfs_commit_thread_wait);
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static int jfs_commit_thread_waking;
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/*
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* Retry logic exist outside these macros to protect from spurrious wakeups.
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*/
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static inline void TXN_SLEEP_DROP_LOCK(wait_queue_head_t * event)
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{
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DECLARE_WAITQUEUE(wait, current);
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add_wait_queue(event, &wait);
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set_current_state(TASK_UNINTERRUPTIBLE);
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TXN_UNLOCK();
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io_schedule();
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remove_wait_queue(event, &wait);
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}
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#define TXN_SLEEP(event)\
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{\
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TXN_SLEEP_DROP_LOCK(event);\
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TXN_LOCK();\
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}
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#define TXN_WAKEUP(event) wake_up_all(event)
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/*
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* statistics
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*/
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static struct {
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tid_t maxtid; /* 4: biggest tid ever used */
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lid_t maxlid; /* 4: biggest lid ever used */
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int ntid; /* 4: # of transactions performed */
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int nlid; /* 4: # of tlocks acquired */
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int waitlock; /* 4: # of tlock wait */
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} stattx;
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/*
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* forward references
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*/
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static int diLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
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struct tlock * tlck, struct commit * cd);
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static int dataLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
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struct tlock * tlck);
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static void dtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
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struct tlock * tlck);
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static void mapLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
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struct tlock * tlck);
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static void txAllocPMap(struct inode *ip, struct maplock * maplock,
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struct tblock * tblk);
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static void txForce(struct tblock * tblk);
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static int txLog(struct jfs_log * log, struct tblock * tblk,
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struct commit * cd);
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static void txUpdateMap(struct tblock * tblk);
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static void txRelease(struct tblock * tblk);
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static void xtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
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struct tlock * tlck);
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static void LogSyncRelease(struct metapage * mp);
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/*
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* transaction block/lock management
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* ---------------------------------
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*/
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/*
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* Get a transaction lock from the free list. If the number in use is
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* greater than the high water mark, wake up the sync daemon. This should
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* free some anonymous transaction locks. (TXN_LOCK must be held.)
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*/
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static lid_t txLockAlloc(void)
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{
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lid_t lid;
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INCREMENT(TxStat.txLockAlloc);
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if (!TxAnchor.freelock) {
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INCREMENT(TxStat.txLockAlloc_freelock);
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}
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while (!(lid = TxAnchor.freelock))
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TXN_SLEEP(&TxAnchor.freelockwait);
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TxAnchor.freelock = TxLock[lid].next;
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HIGHWATERMARK(stattx.maxlid, lid);
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if ((++TxAnchor.tlocksInUse > TxLockHWM) && (jfs_tlocks_low == 0)) {
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jfs_info("txLockAlloc tlocks low");
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jfs_tlocks_low = 1;
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wake_up_process(jfsSyncThread);
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}
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return lid;
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}
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static void txLockFree(lid_t lid)
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{
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TxLock[lid].tid = 0;
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TxLock[lid].next = TxAnchor.freelock;
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TxAnchor.freelock = lid;
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TxAnchor.tlocksInUse--;
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if (jfs_tlocks_low && (TxAnchor.tlocksInUse < TxLockLWM)) {
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jfs_info("txLockFree jfs_tlocks_low no more");
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jfs_tlocks_low = 0;
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TXN_WAKEUP(&TxAnchor.lowlockwait);
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}
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TXN_WAKEUP(&TxAnchor.freelockwait);
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}
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/*
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* NAME: txInit()
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*
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* FUNCTION: initialize transaction management structures
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*
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* RETURN:
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*
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* serialization: single thread at jfs_init()
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*/
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int txInit(void)
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{
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int k, size;
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struct sysinfo si;
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/* Set defaults for nTxLock and nTxBlock if unset */
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if (nTxLock == -1) {
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if (nTxBlock == -1) {
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/* Base default on memory size */
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si_meminfo(&si);
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if (si.totalram > (256 * 1024)) /* 1 GB */
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nTxLock = 64 * 1024;
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else
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nTxLock = si.totalram >> 2;
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} else if (nTxBlock > (8 * 1024))
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nTxLock = 64 * 1024;
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else
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nTxLock = nTxBlock << 3;
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}
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if (nTxBlock == -1)
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nTxBlock = nTxLock >> 3;
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/* Verify tunable parameters */
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if (nTxBlock < 16)
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nTxBlock = 16; /* No one should set it this low */
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if (nTxBlock > 65536)
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nTxBlock = 65536;
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if (nTxLock < 256)
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nTxLock = 256; /* No one should set it this low */
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if (nTxLock > 65536)
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nTxLock = 65536;
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printk(KERN_INFO "JFS: nTxBlock = %d, nTxLock = %d\n",
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nTxBlock, nTxLock);
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/*
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* initialize transaction block (tblock) table
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*
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* transaction id (tid) = tblock index
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* tid = 0 is reserved.
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*/
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TxLockLWM = (nTxLock * 4) / 10;
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TxLockHWM = (nTxLock * 7) / 10;
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TxLockVHWM = (nTxLock * 8) / 10;
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size = sizeof(struct tblock) * nTxBlock;
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TxBlock = vmalloc(size);
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if (TxBlock == NULL)
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return -ENOMEM;
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for (k = 1; k < nTxBlock - 1; k++) {
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TxBlock[k].next = k + 1;
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init_waitqueue_head(&TxBlock[k].gcwait);
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init_waitqueue_head(&TxBlock[k].waitor);
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}
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TxBlock[k].next = 0;
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init_waitqueue_head(&TxBlock[k].gcwait);
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init_waitqueue_head(&TxBlock[k].waitor);
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TxAnchor.freetid = 1;
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init_waitqueue_head(&TxAnchor.freewait);
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stattx.maxtid = 1; /* statistics */
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/*
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* initialize transaction lock (tlock) table
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*
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* transaction lock id = tlock index
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* tlock id = 0 is reserved.
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*/
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size = sizeof(struct tlock) * nTxLock;
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TxLock = vmalloc(size);
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if (TxLock == NULL) {
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vfree(TxBlock);
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return -ENOMEM;
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}
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/* initialize tlock table */
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for (k = 1; k < nTxLock - 1; k++)
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TxLock[k].next = k + 1;
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TxLock[k].next = 0;
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init_waitqueue_head(&TxAnchor.freelockwait);
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init_waitqueue_head(&TxAnchor.lowlockwait);
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TxAnchor.freelock = 1;
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TxAnchor.tlocksInUse = 0;
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INIT_LIST_HEAD(&TxAnchor.anon_list);
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INIT_LIST_HEAD(&TxAnchor.anon_list2);
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LAZY_LOCK_INIT();
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INIT_LIST_HEAD(&TxAnchor.unlock_queue);
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stattx.maxlid = 1; /* statistics */
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return 0;
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}
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/*
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* NAME: txExit()
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*
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* FUNCTION: clean up when module is unloaded
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*/
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void txExit(void)
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{
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vfree(TxLock);
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TxLock = NULL;
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vfree(TxBlock);
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TxBlock = NULL;
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}
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/*
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* NAME: txBegin()
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*
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* FUNCTION: start a transaction.
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*
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* PARAMETER: sb - superblock
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* flag - force for nested tx;
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*
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* RETURN: tid - transaction id
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*
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* note: flag force allows to start tx for nested tx
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* to prevent deadlock on logsync barrier;
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*/
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tid_t txBegin(struct super_block *sb, int flag)
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{
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tid_t t;
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struct tblock *tblk;
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struct jfs_log *log;
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jfs_info("txBegin: flag = 0x%x", flag);
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log = JFS_SBI(sb)->log;
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TXN_LOCK();
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INCREMENT(TxStat.txBegin);
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retry:
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if (!(flag & COMMIT_FORCE)) {
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/*
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* synchronize with logsync barrier
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*/
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if (test_bit(log_SYNCBARRIER, &log->flag) ||
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test_bit(log_QUIESCE, &log->flag)) {
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INCREMENT(TxStat.txBegin_barrier);
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TXN_SLEEP(&log->syncwait);
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goto retry;
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}
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}
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if (flag == 0) {
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/*
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* Don't begin transaction if we're getting starved for tlocks
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* unless COMMIT_FORCE or COMMIT_INODE (which may ultimately
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* free tlocks)
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*/
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if (TxAnchor.tlocksInUse > TxLockVHWM) {
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INCREMENT(TxStat.txBegin_lockslow);
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TXN_SLEEP(&TxAnchor.lowlockwait);
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goto retry;
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}
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}
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/*
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* allocate transaction id/block
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*/
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if ((t = TxAnchor.freetid) == 0) {
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jfs_info("txBegin: waiting for free tid");
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INCREMENT(TxStat.txBegin_freetid);
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TXN_SLEEP(&TxAnchor.freewait);
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goto retry;
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}
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tblk = tid_to_tblock(t);
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if ((tblk->next == 0) && !(flag & COMMIT_FORCE)) {
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/* Don't let a non-forced transaction take the last tblk */
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jfs_info("txBegin: waiting for free tid");
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INCREMENT(TxStat.txBegin_freetid);
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TXN_SLEEP(&TxAnchor.freewait);
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goto retry;
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}
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TxAnchor.freetid = tblk->next;
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/*
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* initialize transaction
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*/
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|
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/*
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* We can't zero the whole thing or we screw up another thread being
|
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* awakened after sleeping on tblk->waitor
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*
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* memset(tblk, 0, sizeof(struct tblock));
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*/
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tblk->next = tblk->last = tblk->xflag = tblk->flag = tblk->lsn = 0;
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tblk->sb = sb;
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++log->logtid;
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tblk->logtid = log->logtid;
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++log->active;
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HIGHWATERMARK(stattx.maxtid, t); /* statistics */
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INCREMENT(stattx.ntid); /* statistics */
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TXN_UNLOCK();
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jfs_info("txBegin: returning tid = %d", t);
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return t;
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}
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|
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/*
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* NAME: txBeginAnon()
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*
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* FUNCTION: start an anonymous transaction.
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* Blocks if logsync or available tlocks are low to prevent
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* anonymous tlocks from depleting supply.
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*
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* PARAMETER: sb - superblock
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*
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* RETURN: none
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*/
|
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void txBeginAnon(struct super_block *sb)
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{
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struct jfs_log *log;
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log = JFS_SBI(sb)->log;
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TXN_LOCK();
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INCREMENT(TxStat.txBeginAnon);
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retry:
|
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/*
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* synchronize with logsync barrier
|
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*/
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if (test_bit(log_SYNCBARRIER, &log->flag) ||
|
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test_bit(log_QUIESCE, &log->flag)) {
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INCREMENT(TxStat.txBeginAnon_barrier);
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TXN_SLEEP(&log->syncwait);
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goto retry;
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}
|
|
|
|
/*
|
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* Don't begin transaction if we're getting starved for tlocks
|
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*/
|
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if (TxAnchor.tlocksInUse > TxLockVHWM) {
|
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INCREMENT(TxStat.txBeginAnon_lockslow);
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TXN_SLEEP(&TxAnchor.lowlockwait);
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goto retry;
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}
|
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TXN_UNLOCK();
|
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}
|
|
|
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/*
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* txEnd()
|
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*
|
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* function: free specified transaction block.
|
|
*
|
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* logsync barrier processing:
|
|
*
|
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* serialization:
|
|
*/
|
|
void txEnd(tid_t tid)
|
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{
|
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struct tblock *tblk = tid_to_tblock(tid);
|
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struct jfs_log *log;
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|
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jfs_info("txEnd: tid = %d", tid);
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TXN_LOCK();
|
|
|
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/*
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* wakeup transactions waiting on the page locked
|
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* by the current transaction
|
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*/
|
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TXN_WAKEUP(&tblk->waitor);
|
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|
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log = JFS_SBI(tblk->sb)->log;
|
|
|
|
/*
|
|
* Lazy commit thread can't free this guy until we mark it UNLOCKED,
|
|
* otherwise, we would be left with a transaction that may have been
|
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* reused.
|
|
*
|
|
* Lazy commit thread will turn off tblkGC_LAZY before calling this
|
|
* routine.
|
|
*/
|
|
if (tblk->flag & tblkGC_LAZY) {
|
|
jfs_info("txEnd called w/lazy tid: %d, tblk = 0x%p", tid, tblk);
|
|
TXN_UNLOCK();
|
|
|
|
spin_lock_irq(&log->gclock); // LOGGC_LOCK
|
|
tblk->flag |= tblkGC_UNLOCKED;
|
|
spin_unlock_irq(&log->gclock); // LOGGC_UNLOCK
|
|
return;
|
|
}
|
|
|
|
jfs_info("txEnd: tid: %d, tblk = 0x%p", tid, tblk);
|
|
|
|
assert(tblk->next == 0);
|
|
|
|
/*
|
|
* insert tblock back on freelist
|
|
*/
|
|
tblk->next = TxAnchor.freetid;
|
|
TxAnchor.freetid = tid;
|
|
|
|
/*
|
|
* mark the tblock not active
|
|
*/
|
|
if (--log->active == 0) {
|
|
clear_bit(log_FLUSH, &log->flag);
|
|
|
|
/*
|
|
* synchronize with logsync barrier
|
|
*/
|
|
if (test_bit(log_SYNCBARRIER, &log->flag)) {
|
|
TXN_UNLOCK();
|
|
|
|
/* write dirty metadata & forward log syncpt */
|
|
jfs_syncpt(log, 1);
|
|
|
|
jfs_info("log barrier off: 0x%x", log->lsn);
|
|
|
|
/* enable new transactions start */
|
|
clear_bit(log_SYNCBARRIER, &log->flag);
|
|
|
|
/* wakeup all waitors for logsync barrier */
|
|
TXN_WAKEUP(&log->syncwait);
|
|
|
|
goto wakeup;
|
|
}
|
|
}
|
|
|
|
TXN_UNLOCK();
|
|
wakeup:
|
|
/*
|
|
* wakeup all waitors for a free tblock
|
|
*/
|
|
TXN_WAKEUP(&TxAnchor.freewait);
|
|
}
|
|
|
|
/*
|
|
* txLock()
|
|
*
|
|
* function: acquire a transaction lock on the specified <mp>
|
|
*
|
|
* parameter:
|
|
*
|
|
* return: transaction lock id
|
|
*
|
|
* serialization:
|
|
*/
|
|
struct tlock *txLock(tid_t tid, struct inode *ip, struct metapage * mp,
|
|
int type)
|
|
{
|
|
struct jfs_inode_info *jfs_ip = JFS_IP(ip);
|
|
int dir_xtree = 0;
|
|
lid_t lid;
|
|
tid_t xtid;
|
|
struct tlock *tlck;
|
|
struct xtlock *xtlck;
|
|
struct linelock *linelock;
|
|
xtpage_t *p;
|
|
struct tblock *tblk;
|
|
|
|
TXN_LOCK();
|
|
|
|
if (S_ISDIR(ip->i_mode) && (type & tlckXTREE) &&
|
|
!(mp->xflag & COMMIT_PAGE)) {
|
|
/*
|
|
* Directory inode is special. It can have both an xtree tlock
|
|
* and a dtree tlock associated with it.
|
|
*/
|
|
dir_xtree = 1;
|
|
lid = jfs_ip->xtlid;
|
|
} else
|
|
lid = mp->lid;
|
|
|
|
/* is page not locked by a transaction ? */
|
|
if (lid == 0)
|
|
goto allocateLock;
|
|
|
|
jfs_info("txLock: tid:%d ip:0x%p mp:0x%p lid:%d", tid, ip, mp, lid);
|
|
|
|
/* is page locked by the requester transaction ? */
|
|
tlck = lid_to_tlock(lid);
|
|
if ((xtid = tlck->tid) == tid) {
|
|
TXN_UNLOCK();
|
|
goto grantLock;
|
|
}
|
|
|
|
/*
|
|
* is page locked by anonymous transaction/lock ?
|
|
*
|
|
* (page update without transaction (i.e., file write) is
|
|
* locked under anonymous transaction tid = 0:
|
|
* anonymous tlocks maintained on anonymous tlock list of
|
|
* the inode of the page and available to all anonymous
|
|
* transactions until txCommit() time at which point
|
|
* they are transferred to the transaction tlock list of
|
|
* the committing transaction of the inode)
|
|
*/
|
|
if (xtid == 0) {
|
|
tlck->tid = tid;
|
|
TXN_UNLOCK();
|
|
tblk = tid_to_tblock(tid);
|
|
/*
|
|
* The order of the tlocks in the transaction is important
|
|
* (during truncate, child xtree pages must be freed before
|
|
* parent's tlocks change the working map).
|
|
* Take tlock off anonymous list and add to tail of
|
|
* transaction list
|
|
*
|
|
* Note: We really need to get rid of the tid & lid and
|
|
* use list_head's. This code is getting UGLY!
|
|
*/
|
|
if (jfs_ip->atlhead == lid) {
|
|
if (jfs_ip->atltail == lid) {
|
|
/* only anonymous txn.
|
|
* Remove from anon_list
|
|
*/
|
|
TXN_LOCK();
|
|
list_del_init(&jfs_ip->anon_inode_list);
|
|
TXN_UNLOCK();
|
|
}
|
|
jfs_ip->atlhead = tlck->next;
|
|
} else {
|
|
lid_t last;
|
|
for (last = jfs_ip->atlhead;
|
|
lid_to_tlock(last)->next != lid;
|
|
last = lid_to_tlock(last)->next) {
|
|
assert(last);
|
|
}
|
|
lid_to_tlock(last)->next = tlck->next;
|
|
if (jfs_ip->atltail == lid)
|
|
jfs_ip->atltail = last;
|
|
}
|
|
|
|
/* insert the tlock at tail of transaction tlock list */
|
|
|
|
if (tblk->next)
|
|
lid_to_tlock(tblk->last)->next = lid;
|
|
else
|
|
tblk->next = lid;
|
|
tlck->next = 0;
|
|
tblk->last = lid;
|
|
|
|
goto grantLock;
|
|
}
|
|
|
|
goto waitLock;
|
|
|
|
/*
|
|
* allocate a tlock
|
|
*/
|
|
allocateLock:
|
|
lid = txLockAlloc();
|
|
tlck = lid_to_tlock(lid);
|
|
|
|
/*
|
|
* initialize tlock
|
|
*/
|
|
tlck->tid = tid;
|
|
|
|
TXN_UNLOCK();
|
|
|
|
/* mark tlock for meta-data page */
|
|
if (mp->xflag & COMMIT_PAGE) {
|
|
|
|
tlck->flag = tlckPAGELOCK;
|
|
|
|
/* mark the page dirty and nohomeok */
|
|
metapage_nohomeok(mp);
|
|
|
|
jfs_info("locking mp = 0x%p, nohomeok = %d tid = %d tlck = 0x%p",
|
|
mp, mp->nohomeok, tid, tlck);
|
|
|
|
/* if anonymous transaction, and buffer is on the group
|
|
* commit synclist, mark inode to show this. This will
|
|
* prevent the buffer from being marked nohomeok for too
|
|
* long a time.
|
|
*/
|
|
if ((tid == 0) && mp->lsn)
|
|
set_cflag(COMMIT_Synclist, ip);
|
|
}
|
|
/* mark tlock for in-memory inode */
|
|
else
|
|
tlck->flag = tlckINODELOCK;
|
|
|
|
if (S_ISDIR(ip->i_mode))
|
|
tlck->flag |= tlckDIRECTORY;
|
|
|
|
tlck->type = 0;
|
|
|
|
/* bind the tlock and the page */
|
|
tlck->ip = ip;
|
|
tlck->mp = mp;
|
|
if (dir_xtree)
|
|
jfs_ip->xtlid = lid;
|
|
else
|
|
mp->lid = lid;
|
|
|
|
/*
|
|
* enqueue transaction lock to transaction/inode
|
|
*/
|
|
/* insert the tlock at tail of transaction tlock list */
|
|
if (tid) {
|
|
tblk = tid_to_tblock(tid);
|
|
if (tblk->next)
|
|
lid_to_tlock(tblk->last)->next = lid;
|
|
else
|
|
tblk->next = lid;
|
|
tlck->next = 0;
|
|
tblk->last = lid;
|
|
}
|
|
/* anonymous transaction:
|
|
* insert the tlock at head of inode anonymous tlock list
|
|
*/
|
|
else {
|
|
tlck->next = jfs_ip->atlhead;
|
|
jfs_ip->atlhead = lid;
|
|
if (tlck->next == 0) {
|
|
/* This inode's first anonymous transaction */
|
|
jfs_ip->atltail = lid;
|
|
TXN_LOCK();
|
|
list_add_tail(&jfs_ip->anon_inode_list,
|
|
&TxAnchor.anon_list);
|
|
TXN_UNLOCK();
|
|
}
|
|
}
|
|
|
|
/* initialize type dependent area for linelock */
|
|
linelock = (struct linelock *) & tlck->lock;
|
|
linelock->next = 0;
|
|
linelock->flag = tlckLINELOCK;
|
|
linelock->maxcnt = TLOCKSHORT;
|
|
linelock->index = 0;
|
|
|
|
switch (type & tlckTYPE) {
|
|
case tlckDTREE:
|
|
linelock->l2linesize = L2DTSLOTSIZE;
|
|
break;
|
|
|
|
case tlckXTREE:
|
|
linelock->l2linesize = L2XTSLOTSIZE;
|
|
|
|
xtlck = (struct xtlock *) linelock;
|
|
xtlck->header.offset = 0;
|
|
xtlck->header.length = 2;
|
|
|
|
if (type & tlckNEW) {
|
|
xtlck->lwm.offset = XTENTRYSTART;
|
|
} else {
|
|
if (mp->xflag & COMMIT_PAGE)
|
|
p = (xtpage_t *) mp->data;
|
|
else
|
|
p = &jfs_ip->i_xtroot;
|
|
xtlck->lwm.offset =
|
|
le16_to_cpu(p->header.nextindex);
|
|
}
|
|
xtlck->lwm.length = 0; /* ! */
|
|
xtlck->twm.offset = 0;
|
|
xtlck->hwm.offset = 0;
|
|
|
|
xtlck->index = 2;
|
|
break;
|
|
|
|
case tlckINODE:
|
|
linelock->l2linesize = L2INODESLOTSIZE;
|
|
break;
|
|
|
|
case tlckDATA:
|
|
linelock->l2linesize = L2DATASLOTSIZE;
|
|
break;
|
|
|
|
default:
|
|
jfs_err("UFO tlock:0x%p", tlck);
|
|
}
|
|
|
|
/*
|
|
* update tlock vector
|
|
*/
|
|
grantLock:
|
|
tlck->type |= type;
|
|
|
|
return tlck;
|
|
|
|
/*
|
|
* page is being locked by another transaction:
|
|
*/
|
|
waitLock:
|
|
/* Only locks on ipimap or ipaimap should reach here */
|
|
/* assert(jfs_ip->fileset == AGGREGATE_I); */
|
|
if (jfs_ip->fileset != AGGREGATE_I) {
|
|
printk(KERN_ERR "txLock: trying to lock locked page!");
|
|
print_hex_dump(KERN_ERR, "ip: ", DUMP_PREFIX_ADDRESS, 16, 4,
|
|
ip, sizeof(*ip), 0);
|
|
print_hex_dump(KERN_ERR, "mp: ", DUMP_PREFIX_ADDRESS, 16, 4,
|
|
mp, sizeof(*mp), 0);
|
|
print_hex_dump(KERN_ERR, "Locker's tblock: ",
|
|
DUMP_PREFIX_ADDRESS, 16, 4, tid_to_tblock(tid),
|
|
sizeof(struct tblock), 0);
|
|
print_hex_dump(KERN_ERR, "Tlock: ", DUMP_PREFIX_ADDRESS, 16, 4,
|
|
tlck, sizeof(*tlck), 0);
|
|
BUG();
|
|
}
|
|
INCREMENT(stattx.waitlock); /* statistics */
|
|
TXN_UNLOCK();
|
|
release_metapage(mp);
|
|
TXN_LOCK();
|
|
xtid = tlck->tid; /* reacquire after dropping TXN_LOCK */
|
|
|
|
jfs_info("txLock: in waitLock, tid = %d, xtid = %d, lid = %d",
|
|
tid, xtid, lid);
|
|
|
|
/* Recheck everything since dropping TXN_LOCK */
|
|
if (xtid && (tlck->mp == mp) && (mp->lid == lid))
|
|
TXN_SLEEP_DROP_LOCK(&tid_to_tblock(xtid)->waitor);
|
|
else
|
|
TXN_UNLOCK();
|
|
jfs_info("txLock: awakened tid = %d, lid = %d", tid, lid);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* NAME: txRelease()
|
|
*
|
|
* FUNCTION: Release buffers associated with transaction locks, but don't
|
|
* mark homeok yet. The allows other transactions to modify
|
|
* buffers, but won't let them go to disk until commit record
|
|
* actually gets written.
|
|
*
|
|
* PARAMETER:
|
|
* tblk -
|
|
*
|
|
* RETURN: Errors from subroutines.
|
|
*/
|
|
static void txRelease(struct tblock * tblk)
|
|
{
|
|
struct metapage *mp;
|
|
lid_t lid;
|
|
struct tlock *tlck;
|
|
|
|
TXN_LOCK();
|
|
|
|
for (lid = tblk->next; lid; lid = tlck->next) {
|
|
tlck = lid_to_tlock(lid);
|
|
if ((mp = tlck->mp) != NULL &&
|
|
(tlck->type & tlckBTROOT) == 0) {
|
|
assert(mp->xflag & COMMIT_PAGE);
|
|
mp->lid = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* wakeup transactions waiting on a page locked
|
|
* by the current transaction
|
|
*/
|
|
TXN_WAKEUP(&tblk->waitor);
|
|
|
|
TXN_UNLOCK();
|
|
}
|
|
|
|
/*
|
|
* NAME: txUnlock()
|
|
*
|
|
* FUNCTION: Initiates pageout of pages modified by tid in journalled
|
|
* objects and frees their lockwords.
|
|
*/
|
|
static void txUnlock(struct tblock * tblk)
|
|
{
|
|
struct tlock *tlck;
|
|
struct linelock *linelock;
|
|
lid_t lid, next, llid, k;
|
|
struct metapage *mp;
|
|
struct jfs_log *log;
|
|
int difft, diffp;
|
|
unsigned long flags;
|
|
|
|
jfs_info("txUnlock: tblk = 0x%p", tblk);
|
|
log = JFS_SBI(tblk->sb)->log;
|
|
|
|
/*
|
|
* mark page under tlock homeok (its log has been written):
|
|
*/
|
|
for (lid = tblk->next; lid; lid = next) {
|
|
tlck = lid_to_tlock(lid);
|
|
next = tlck->next;
|
|
|
|
jfs_info("unlocking lid = %d, tlck = 0x%p", lid, tlck);
|
|
|
|
/* unbind page from tlock */
|
|
if ((mp = tlck->mp) != NULL &&
|
|
(tlck->type & tlckBTROOT) == 0) {
|
|
assert(mp->xflag & COMMIT_PAGE);
|
|
|
|
/* hold buffer
|
|
*/
|
|
hold_metapage(mp);
|
|
|
|
assert(mp->nohomeok > 0);
|
|
_metapage_homeok(mp);
|
|
|
|
/* inherit younger/larger clsn */
|
|
LOGSYNC_LOCK(log, flags);
|
|
if (mp->clsn) {
|
|
logdiff(difft, tblk->clsn, log);
|
|
logdiff(diffp, mp->clsn, log);
|
|
if (difft > diffp)
|
|
mp->clsn = tblk->clsn;
|
|
} else
|
|
mp->clsn = tblk->clsn;
|
|
LOGSYNC_UNLOCK(log, flags);
|
|
|
|
assert(!(tlck->flag & tlckFREEPAGE));
|
|
|
|
put_metapage(mp);
|
|
}
|
|
|
|
/* insert tlock, and linelock(s) of the tlock if any,
|
|
* at head of freelist
|
|
*/
|
|
TXN_LOCK();
|
|
|
|
llid = ((struct linelock *) & tlck->lock)->next;
|
|
while (llid) {
|
|
linelock = (struct linelock *) lid_to_tlock(llid);
|
|
k = linelock->next;
|
|
txLockFree(llid);
|
|
llid = k;
|
|
}
|
|
txLockFree(lid);
|
|
|
|
TXN_UNLOCK();
|
|
}
|
|
tblk->next = tblk->last = 0;
|
|
|
|
/*
|
|
* remove tblock from logsynclist
|
|
* (allocation map pages inherited lsn of tblk and
|
|
* has been inserted in logsync list at txUpdateMap())
|
|
*/
|
|
if (tblk->lsn) {
|
|
LOGSYNC_LOCK(log, flags);
|
|
log->count--;
|
|
list_del(&tblk->synclist);
|
|
LOGSYNC_UNLOCK(log, flags);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* txMaplock()
|
|
*
|
|
* function: allocate a transaction lock for freed page/entry;
|
|
* for freed page, maplock is used as xtlock/dtlock type;
|
|
*/
|
|
struct tlock *txMaplock(tid_t tid, struct inode *ip, int type)
|
|
{
|
|
struct jfs_inode_info *jfs_ip = JFS_IP(ip);
|
|
lid_t lid;
|
|
struct tblock *tblk;
|
|
struct tlock *tlck;
|
|
struct maplock *maplock;
|
|
|
|
TXN_LOCK();
|
|
|
|
/*
|
|
* allocate a tlock
|
|
*/
|
|
lid = txLockAlloc();
|
|
tlck = lid_to_tlock(lid);
|
|
|
|
/*
|
|
* initialize tlock
|
|
*/
|
|
tlck->tid = tid;
|
|
|
|
/* bind the tlock and the object */
|
|
tlck->flag = tlckINODELOCK;
|
|
if (S_ISDIR(ip->i_mode))
|
|
tlck->flag |= tlckDIRECTORY;
|
|
tlck->ip = ip;
|
|
tlck->mp = NULL;
|
|
|
|
tlck->type = type;
|
|
|
|
/*
|
|
* enqueue transaction lock to transaction/inode
|
|
*/
|
|
/* insert the tlock at tail of transaction tlock list */
|
|
if (tid) {
|
|
tblk = tid_to_tblock(tid);
|
|
if (tblk->next)
|
|
lid_to_tlock(tblk->last)->next = lid;
|
|
else
|
|
tblk->next = lid;
|
|
tlck->next = 0;
|
|
tblk->last = lid;
|
|
}
|
|
/* anonymous transaction:
|
|
* insert the tlock at head of inode anonymous tlock list
|
|
*/
|
|
else {
|
|
tlck->next = jfs_ip->atlhead;
|
|
jfs_ip->atlhead = lid;
|
|
if (tlck->next == 0) {
|
|
/* This inode's first anonymous transaction */
|
|
jfs_ip->atltail = lid;
|
|
list_add_tail(&jfs_ip->anon_inode_list,
|
|
&TxAnchor.anon_list);
|
|
}
|
|
}
|
|
|
|
TXN_UNLOCK();
|
|
|
|
/* initialize type dependent area for maplock */
|
|
maplock = (struct maplock *) & tlck->lock;
|
|
maplock->next = 0;
|
|
maplock->maxcnt = 0;
|
|
maplock->index = 0;
|
|
|
|
return tlck;
|
|
}
|
|
|
|
/*
|
|
* txLinelock()
|
|
*
|
|
* function: allocate a transaction lock for log vector list
|
|
*/
|
|
struct linelock *txLinelock(struct linelock * tlock)
|
|
{
|
|
lid_t lid;
|
|
struct tlock *tlck;
|
|
struct linelock *linelock;
|
|
|
|
TXN_LOCK();
|
|
|
|
/* allocate a TxLock structure */
|
|
lid = txLockAlloc();
|
|
tlck = lid_to_tlock(lid);
|
|
|
|
TXN_UNLOCK();
|
|
|
|
/* initialize linelock */
|
|
linelock = (struct linelock *) tlck;
|
|
linelock->next = 0;
|
|
linelock->flag = tlckLINELOCK;
|
|
linelock->maxcnt = TLOCKLONG;
|
|
linelock->index = 0;
|
|
if (tlck->flag & tlckDIRECTORY)
|
|
linelock->flag |= tlckDIRECTORY;
|
|
|
|
/* append linelock after tlock */
|
|
linelock->next = tlock->next;
|
|
tlock->next = lid;
|
|
|
|
return linelock;
|
|
}
|
|
|
|
/*
|
|
* transaction commit management
|
|
* -----------------------------
|
|
*/
|
|
|
|
/*
|
|
* NAME: txCommit()
|
|
*
|
|
* FUNCTION: commit the changes to the objects specified in
|
|
* clist. For journalled segments only the
|
|
* changes of the caller are committed, ie by tid.
|
|
* for non-journalled segments the data are flushed to
|
|
* disk and then the change to the disk inode and indirect
|
|
* blocks committed (so blocks newly allocated to the
|
|
* segment will be made a part of the segment atomically).
|
|
*
|
|
* all of the segments specified in clist must be in
|
|
* one file system. no more than 6 segments are needed
|
|
* to handle all unix svcs.
|
|
*
|
|
* if the i_nlink field (i.e. disk inode link count)
|
|
* is zero, and the type of inode is a regular file or
|
|
* directory, or symbolic link , the inode is truncated
|
|
* to zero length. the truncation is committed but the
|
|
* VM resources are unaffected until it is closed (see
|
|
* iput and iclose).
|
|
*
|
|
* PARAMETER:
|
|
*
|
|
* RETURN:
|
|
*
|
|
* serialization:
|
|
* on entry the inode lock on each segment is assumed
|
|
* to be held.
|
|
*
|
|
* i/o error:
|
|
*/
|
|
int txCommit(tid_t tid, /* transaction identifier */
|
|
int nip, /* number of inodes to commit */
|
|
struct inode **iplist, /* list of inode to commit */
|
|
int flag)
|
|
{
|
|
int rc = 0;
|
|
struct commit cd;
|
|
struct jfs_log *log;
|
|
struct tblock *tblk;
|
|
struct lrd *lrd;
|
|
struct inode *ip;
|
|
struct jfs_inode_info *jfs_ip;
|
|
int k, n;
|
|
ino_t top;
|
|
struct super_block *sb;
|
|
|
|
jfs_info("txCommit, tid = %d, flag = %d", tid, flag);
|
|
/* is read-only file system ? */
|
|
if (isReadOnly(iplist[0])) {
|
|
rc = -EROFS;
|
|
goto TheEnd;
|
|
}
|
|
|
|
sb = cd.sb = iplist[0]->i_sb;
|
|
cd.tid = tid;
|
|
|
|
if (tid == 0)
|
|
tid = txBegin(sb, 0);
|
|
tblk = tid_to_tblock(tid);
|
|
|
|
/*
|
|
* initialize commit structure
|
|
*/
|
|
log = JFS_SBI(sb)->log;
|
|
cd.log = log;
|
|
|
|
/* initialize log record descriptor in commit */
|
|
lrd = &cd.lrd;
|
|
lrd->logtid = cpu_to_le32(tblk->logtid);
|
|
lrd->backchain = 0;
|
|
|
|
tblk->xflag |= flag;
|
|
|
|
if ((flag & (COMMIT_FORCE | COMMIT_SYNC)) == 0)
|
|
tblk->xflag |= COMMIT_LAZY;
|
|
/*
|
|
* prepare non-journaled objects for commit
|
|
*
|
|
* flush data pages of non-journaled file
|
|
* to prevent the file getting non-initialized disk blocks
|
|
* in case of crash.
|
|
* (new blocks - )
|
|
*/
|
|
cd.iplist = iplist;
|
|
cd.nip = nip;
|
|
|
|
/*
|
|
* acquire transaction lock on (on-disk) inodes
|
|
*
|
|
* update on-disk inode from in-memory inode
|
|
* acquiring transaction locks for AFTER records
|
|
* on the on-disk inode of file object
|
|
*
|
|
* sort the inodes array by inode number in descending order
|
|
* to prevent deadlock when acquiring transaction lock
|
|
* of on-disk inodes on multiple on-disk inode pages by
|
|
* multiple concurrent transactions
|
|
*/
|
|
for (k = 0; k < cd.nip; k++) {
|
|
top = (cd.iplist[k])->i_ino;
|
|
for (n = k + 1; n < cd.nip; n++) {
|
|
ip = cd.iplist[n];
|
|
if (ip->i_ino > top) {
|
|
top = ip->i_ino;
|
|
cd.iplist[n] = cd.iplist[k];
|
|
cd.iplist[k] = ip;
|
|
}
|
|
}
|
|
|
|
ip = cd.iplist[k];
|
|
jfs_ip = JFS_IP(ip);
|
|
|
|
/*
|
|
* BUGBUG - This code has temporarily been removed. The
|
|
* intent is to ensure that any file data is written before
|
|
* the metadata is committed to the journal. This prevents
|
|
* uninitialized data from appearing in a file after the
|
|
* journal has been replayed. (The uninitialized data
|
|
* could be sensitive data removed by another user.)
|
|
*
|
|
* The problem now is that we are holding the IWRITELOCK
|
|
* on the inode, and calling filemap_fdatawrite on an
|
|
* unmapped page will cause a deadlock in jfs_get_block.
|
|
*
|
|
* The long term solution is to pare down the use of
|
|
* IWRITELOCK. We are currently holding it too long.
|
|
* We could also be smarter about which data pages need
|
|
* to be written before the transaction is committed and
|
|
* when we don't need to worry about it at all.
|
|
*
|
|
* if ((!S_ISDIR(ip->i_mode))
|
|
* && (tblk->flag & COMMIT_DELETE) == 0)
|
|
* filemap_write_and_wait(ip->i_mapping);
|
|
*/
|
|
|
|
/*
|
|
* Mark inode as not dirty. It will still be on the dirty
|
|
* inode list, but we'll know not to commit it again unless
|
|
* it gets marked dirty again
|
|
*/
|
|
clear_cflag(COMMIT_Dirty, ip);
|
|
|
|
/* inherit anonymous tlock(s) of inode */
|
|
if (jfs_ip->atlhead) {
|
|
lid_to_tlock(jfs_ip->atltail)->next = tblk->next;
|
|
tblk->next = jfs_ip->atlhead;
|
|
if (!tblk->last)
|
|
tblk->last = jfs_ip->atltail;
|
|
jfs_ip->atlhead = jfs_ip->atltail = 0;
|
|
TXN_LOCK();
|
|
list_del_init(&jfs_ip->anon_inode_list);
|
|
TXN_UNLOCK();
|
|
}
|
|
|
|
/*
|
|
* acquire transaction lock on on-disk inode page
|
|
* (become first tlock of the tblk's tlock list)
|
|
*/
|
|
if (((rc = diWrite(tid, ip))))
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* write log records from transaction locks
|
|
*
|
|
* txUpdateMap() resets XAD_NEW in XAD.
|
|
*/
|
|
if ((rc = txLog(log, tblk, &cd)))
|
|
goto TheEnd;
|
|
|
|
/*
|
|
* Ensure that inode isn't reused before
|
|
* lazy commit thread finishes processing
|
|
*/
|
|
if (tblk->xflag & COMMIT_DELETE) {
|
|
ihold(tblk->u.ip);
|
|
/*
|
|
* Avoid a rare deadlock
|
|
*
|
|
* If the inode is locked, we may be blocked in
|
|
* jfs_commit_inode. If so, we don't want the
|
|
* lazy_commit thread doing the last iput() on the inode
|
|
* since that may block on the locked inode. Instead,
|
|
* commit the transaction synchronously, so the last iput
|
|
* will be done by the calling thread (or later)
|
|
*/
|
|
/*
|
|
* I believe this code is no longer needed. Splitting I_LOCK
|
|
* into two bits, I_NEW and I_SYNC should prevent this
|
|
* deadlock as well. But since I don't have a JFS testload
|
|
* to verify this, only a trivial s/I_LOCK/I_SYNC/ was done.
|
|
* Joern
|
|
*/
|
|
if (tblk->u.ip->i_state & I_SYNC)
|
|
tblk->xflag &= ~COMMIT_LAZY;
|
|
}
|
|
|
|
ASSERT((!(tblk->xflag & COMMIT_DELETE)) ||
|
|
((tblk->u.ip->i_nlink == 0) &&
|
|
!test_cflag(COMMIT_Nolink, tblk->u.ip)));
|
|
|
|
/*
|
|
* write COMMIT log record
|
|
*/
|
|
lrd->type = cpu_to_le16(LOG_COMMIT);
|
|
lrd->length = 0;
|
|
lmLog(log, tblk, lrd, NULL);
|
|
|
|
lmGroupCommit(log, tblk);
|
|
|
|
/*
|
|
* - transaction is now committed -
|
|
*/
|
|
|
|
/*
|
|
* force pages in careful update
|
|
* (imap addressing structure update)
|
|
*/
|
|
if (flag & COMMIT_FORCE)
|
|
txForce(tblk);
|
|
|
|
/*
|
|
* update allocation map.
|
|
*
|
|
* update inode allocation map and inode:
|
|
* free pager lock on memory object of inode if any.
|
|
* update block allocation map.
|
|
*
|
|
* txUpdateMap() resets XAD_NEW in XAD.
|
|
*/
|
|
if (tblk->xflag & COMMIT_FORCE)
|
|
txUpdateMap(tblk);
|
|
|
|
/*
|
|
* free transaction locks and pageout/free pages
|
|
*/
|
|
txRelease(tblk);
|
|
|
|
if ((tblk->flag & tblkGC_LAZY) == 0)
|
|
txUnlock(tblk);
|
|
|
|
|
|
/*
|
|
* reset in-memory object state
|
|
*/
|
|
for (k = 0; k < cd.nip; k++) {
|
|
ip = cd.iplist[k];
|
|
jfs_ip = JFS_IP(ip);
|
|
|
|
/*
|
|
* reset in-memory inode state
|
|
*/
|
|
jfs_ip->bxflag = 0;
|
|
jfs_ip->blid = 0;
|
|
}
|
|
|
|
out:
|
|
if (rc != 0)
|
|
txAbort(tid, 1);
|
|
|
|
TheEnd:
|
|
jfs_info("txCommit: tid = %d, returning %d", tid, rc);
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* NAME: txLog()
|
|
*
|
|
* FUNCTION: Writes AFTER log records for all lines modified
|
|
* by tid for segments specified by inodes in comdata.
|
|
* Code assumes only WRITELOCKS are recorded in lockwords.
|
|
*
|
|
* PARAMETERS:
|
|
*
|
|
* RETURN :
|
|
*/
|
|
static int txLog(struct jfs_log * log, struct tblock * tblk, struct commit * cd)
|
|
{
|
|
int rc = 0;
|
|
struct inode *ip;
|
|
lid_t lid;
|
|
struct tlock *tlck;
|
|
struct lrd *lrd = &cd->lrd;
|
|
|
|
/*
|
|
* write log record(s) for each tlock of transaction,
|
|
*/
|
|
for (lid = tblk->next; lid; lid = tlck->next) {
|
|
tlck = lid_to_tlock(lid);
|
|
|
|
tlck->flag |= tlckLOG;
|
|
|
|
/* initialize lrd common */
|
|
ip = tlck->ip;
|
|
lrd->aggregate = cpu_to_le32(JFS_SBI(ip->i_sb)->aggregate);
|
|
lrd->log.redopage.fileset = cpu_to_le32(JFS_IP(ip)->fileset);
|
|
lrd->log.redopage.inode = cpu_to_le32(ip->i_ino);
|
|
|
|
/* write log record of page from the tlock */
|
|
switch (tlck->type & tlckTYPE) {
|
|
case tlckXTREE:
|
|
xtLog(log, tblk, lrd, tlck);
|
|
break;
|
|
|
|
case tlckDTREE:
|
|
dtLog(log, tblk, lrd, tlck);
|
|
break;
|
|
|
|
case tlckINODE:
|
|
diLog(log, tblk, lrd, tlck, cd);
|
|
break;
|
|
|
|
case tlckMAP:
|
|
mapLog(log, tblk, lrd, tlck);
|
|
break;
|
|
|
|
case tlckDATA:
|
|
dataLog(log, tblk, lrd, tlck);
|
|
break;
|
|
|
|
default:
|
|
jfs_err("UFO tlock:0x%p", tlck);
|
|
}
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* diLog()
|
|
*
|
|
* function: log inode tlock and format maplock to update bmap;
|
|
*/
|
|
static int diLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
|
|
struct tlock * tlck, struct commit * cd)
|
|
{
|
|
int rc = 0;
|
|
struct metapage *mp;
|
|
pxd_t *pxd;
|
|
struct pxd_lock *pxdlock;
|
|
|
|
mp = tlck->mp;
|
|
|
|
/* initialize as REDOPAGE record format */
|
|
lrd->log.redopage.type = cpu_to_le16(LOG_INODE);
|
|
lrd->log.redopage.l2linesize = cpu_to_le16(L2INODESLOTSIZE);
|
|
|
|
pxd = &lrd->log.redopage.pxd;
|
|
|
|
/*
|
|
* inode after image
|
|
*/
|
|
if (tlck->type & tlckENTRY) {
|
|
/* log after-image for logredo(): */
|
|
lrd->type = cpu_to_le16(LOG_REDOPAGE);
|
|
PXDaddress(pxd, mp->index);
|
|
PXDlength(pxd,
|
|
mp->logical_size >> tblk->sb->s_blocksize_bits);
|
|
lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, tlck));
|
|
|
|
/* mark page as homeward bound */
|
|
tlck->flag |= tlckWRITEPAGE;
|
|
} else if (tlck->type & tlckFREE) {
|
|
/*
|
|
* free inode extent
|
|
*
|
|
* (pages of the freed inode extent have been invalidated and
|
|
* a maplock for free of the extent has been formatted at
|
|
* txLock() time);
|
|
*
|
|
* the tlock had been acquired on the inode allocation map page
|
|
* (iag) that specifies the freed extent, even though the map
|
|
* page is not itself logged, to prevent pageout of the map
|
|
* page before the log;
|
|
*/
|
|
|
|
/* log LOG_NOREDOINOEXT of the freed inode extent for
|
|
* logredo() to start NoRedoPage filters, and to update
|
|
* imap and bmap for free of the extent;
|
|
*/
|
|
lrd->type = cpu_to_le16(LOG_NOREDOINOEXT);
|
|
/*
|
|
* For the LOG_NOREDOINOEXT record, we need
|
|
* to pass the IAG number and inode extent
|
|
* index (within that IAG) from which the
|
|
* the extent being released. These have been
|
|
* passed to us in the iplist[1] and iplist[2].
|
|
*/
|
|
lrd->log.noredoinoext.iagnum =
|
|
cpu_to_le32((u32) (size_t) cd->iplist[1]);
|
|
lrd->log.noredoinoext.inoext_idx =
|
|
cpu_to_le32((u32) (size_t) cd->iplist[2]);
|
|
|
|
pxdlock = (struct pxd_lock *) & tlck->lock;
|
|
*pxd = pxdlock->pxd;
|
|
lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, NULL));
|
|
|
|
/* update bmap */
|
|
tlck->flag |= tlckUPDATEMAP;
|
|
|
|
/* mark page as homeward bound */
|
|
tlck->flag |= tlckWRITEPAGE;
|
|
} else
|
|
jfs_err("diLog: UFO type tlck:0x%p", tlck);
|
|
#ifdef _JFS_WIP
|
|
/*
|
|
* alloc/free external EA extent
|
|
*
|
|
* a maplock for txUpdateMap() to update bPWMAP for alloc/free
|
|
* of the extent has been formatted at txLock() time;
|
|
*/
|
|
else {
|
|
assert(tlck->type & tlckEA);
|
|
|
|
/* log LOG_UPDATEMAP for logredo() to update bmap for
|
|
* alloc of new (and free of old) external EA extent;
|
|
*/
|
|
lrd->type = cpu_to_le16(LOG_UPDATEMAP);
|
|
pxdlock = (struct pxd_lock *) & tlck->lock;
|
|
nlock = pxdlock->index;
|
|
for (i = 0; i < nlock; i++, pxdlock++) {
|
|
if (pxdlock->flag & mlckALLOCPXD)
|
|
lrd->log.updatemap.type =
|
|
cpu_to_le16(LOG_ALLOCPXD);
|
|
else
|
|
lrd->log.updatemap.type =
|
|
cpu_to_le16(LOG_FREEPXD);
|
|
lrd->log.updatemap.nxd = cpu_to_le16(1);
|
|
lrd->log.updatemap.pxd = pxdlock->pxd;
|
|
lrd->backchain =
|
|
cpu_to_le32(lmLog(log, tblk, lrd, NULL));
|
|
}
|
|
|
|
/* update bmap */
|
|
tlck->flag |= tlckUPDATEMAP;
|
|
}
|
|
#endif /* _JFS_WIP */
|
|
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* dataLog()
|
|
*
|
|
* function: log data tlock
|
|
*/
|
|
static int dataLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
|
|
struct tlock * tlck)
|
|
{
|
|
struct metapage *mp;
|
|
pxd_t *pxd;
|
|
|
|
mp = tlck->mp;
|
|
|
|
/* initialize as REDOPAGE record format */
|
|
lrd->log.redopage.type = cpu_to_le16(LOG_DATA);
|
|
lrd->log.redopage.l2linesize = cpu_to_le16(L2DATASLOTSIZE);
|
|
|
|
pxd = &lrd->log.redopage.pxd;
|
|
|
|
/* log after-image for logredo(): */
|
|
lrd->type = cpu_to_le16(LOG_REDOPAGE);
|
|
|
|
if (jfs_dirtable_inline(tlck->ip)) {
|
|
/*
|
|
* The table has been truncated, we've must have deleted
|
|
* the last entry, so don't bother logging this
|
|
*/
|
|
mp->lid = 0;
|
|
grab_metapage(mp);
|
|
metapage_homeok(mp);
|
|
discard_metapage(mp);
|
|
tlck->mp = NULL;
|
|
return 0;
|
|
}
|
|
|
|
PXDaddress(pxd, mp->index);
|
|
PXDlength(pxd, mp->logical_size >> tblk->sb->s_blocksize_bits);
|
|
|
|
lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, tlck));
|
|
|
|
/* mark page as homeward bound */
|
|
tlck->flag |= tlckWRITEPAGE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* dtLog()
|
|
*
|
|
* function: log dtree tlock and format maplock to update bmap;
|
|
*/
|
|
static void dtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
|
|
struct tlock * tlck)
|
|
{
|
|
struct metapage *mp;
|
|
struct pxd_lock *pxdlock;
|
|
pxd_t *pxd;
|
|
|
|
mp = tlck->mp;
|
|
|
|
/* initialize as REDOPAGE/NOREDOPAGE record format */
|
|
lrd->log.redopage.type = cpu_to_le16(LOG_DTREE);
|
|
lrd->log.redopage.l2linesize = cpu_to_le16(L2DTSLOTSIZE);
|
|
|
|
pxd = &lrd->log.redopage.pxd;
|
|
|
|
if (tlck->type & tlckBTROOT)
|
|
lrd->log.redopage.type |= cpu_to_le16(LOG_BTROOT);
|
|
|
|
/*
|
|
* page extension via relocation: entry insertion;
|
|
* page extension in-place: entry insertion;
|
|
* new right page from page split, reinitialized in-line
|
|
* root from root page split: entry insertion;
|
|
*/
|
|
if (tlck->type & (tlckNEW | tlckEXTEND)) {
|
|
/* log after-image of the new page for logredo():
|
|
* mark log (LOG_NEW) for logredo() to initialize
|
|
* freelist and update bmap for alloc of the new page;
|
|
*/
|
|
lrd->type = cpu_to_le16(LOG_REDOPAGE);
|
|
if (tlck->type & tlckEXTEND)
|
|
lrd->log.redopage.type |= cpu_to_le16(LOG_EXTEND);
|
|
else
|
|
lrd->log.redopage.type |= cpu_to_le16(LOG_NEW);
|
|
PXDaddress(pxd, mp->index);
|
|
PXDlength(pxd,
|
|
mp->logical_size >> tblk->sb->s_blocksize_bits);
|
|
lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, tlck));
|
|
|
|
/* format a maplock for txUpdateMap() to update bPMAP for
|
|
* alloc of the new page;
|
|
*/
|
|
if (tlck->type & tlckBTROOT)
|
|
return;
|
|
tlck->flag |= tlckUPDATEMAP;
|
|
pxdlock = (struct pxd_lock *) & tlck->lock;
|
|
pxdlock->flag = mlckALLOCPXD;
|
|
pxdlock->pxd = *pxd;
|
|
|
|
pxdlock->index = 1;
|
|
|
|
/* mark page as homeward bound */
|
|
tlck->flag |= tlckWRITEPAGE;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* entry insertion/deletion,
|
|
* sibling page link update (old right page before split);
|
|
*/
|
|
if (tlck->type & (tlckENTRY | tlckRELINK)) {
|
|
/* log after-image for logredo(): */
|
|
lrd->type = cpu_to_le16(LOG_REDOPAGE);
|
|
PXDaddress(pxd, mp->index);
|
|
PXDlength(pxd,
|
|
mp->logical_size >> tblk->sb->s_blocksize_bits);
|
|
lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, tlck));
|
|
|
|
/* mark page as homeward bound */
|
|
tlck->flag |= tlckWRITEPAGE;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* page deletion: page has been invalidated
|
|
* page relocation: source extent
|
|
*
|
|
* a maplock for free of the page has been formatted
|
|
* at txLock() time);
|
|
*/
|
|
if (tlck->type & (tlckFREE | tlckRELOCATE)) {
|
|
/* log LOG_NOREDOPAGE of the deleted page for logredo()
|
|
* to start NoRedoPage filter and to update bmap for free
|
|
* of the deletd page
|
|
*/
|
|
lrd->type = cpu_to_le16(LOG_NOREDOPAGE);
|
|
pxdlock = (struct pxd_lock *) & tlck->lock;
|
|
*pxd = pxdlock->pxd;
|
|
lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, NULL));
|
|
|
|
/* a maplock for txUpdateMap() for free of the page
|
|
* has been formatted at txLock() time;
|
|
*/
|
|
tlck->flag |= tlckUPDATEMAP;
|
|
}
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* xtLog()
|
|
*
|
|
* function: log xtree tlock and format maplock to update bmap;
|
|
*/
|
|
static void xtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
|
|
struct tlock * tlck)
|
|
{
|
|
struct inode *ip;
|
|
struct metapage *mp;
|
|
xtpage_t *p;
|
|
struct xtlock *xtlck;
|
|
struct maplock *maplock;
|
|
struct xdlistlock *xadlock;
|
|
struct pxd_lock *pxdlock;
|
|
pxd_t *page_pxd;
|
|
int next, lwm, hwm;
|
|
|
|
ip = tlck->ip;
|
|
mp = tlck->mp;
|
|
|
|
/* initialize as REDOPAGE/NOREDOPAGE record format */
|
|
lrd->log.redopage.type = cpu_to_le16(LOG_XTREE);
|
|
lrd->log.redopage.l2linesize = cpu_to_le16(L2XTSLOTSIZE);
|
|
|
|
page_pxd = &lrd->log.redopage.pxd;
|
|
|
|
if (tlck->type & tlckBTROOT) {
|
|
lrd->log.redopage.type |= cpu_to_le16(LOG_BTROOT);
|
|
p = &JFS_IP(ip)->i_xtroot;
|
|
if (S_ISDIR(ip->i_mode))
|
|
lrd->log.redopage.type |=
|
|
cpu_to_le16(LOG_DIR_XTREE);
|
|
} else
|
|
p = (xtpage_t *) mp->data;
|
|
next = le16_to_cpu(p->header.nextindex);
|
|
|
|
xtlck = (struct xtlock *) & tlck->lock;
|
|
|
|
maplock = (struct maplock *) & tlck->lock;
|
|
xadlock = (struct xdlistlock *) maplock;
|
|
|
|
/*
|
|
* entry insertion/extension;
|
|
* sibling page link update (old right page before split);
|
|
*/
|
|
if (tlck->type & (tlckNEW | tlckGROW | tlckRELINK)) {
|
|
/* log after-image for logredo():
|
|
* logredo() will update bmap for alloc of new/extended
|
|
* extents (XAD_NEW|XAD_EXTEND) of XAD[lwm:next) from
|
|
* after-image of XADlist;
|
|
* logredo() resets (XAD_NEW|XAD_EXTEND) flag when
|
|
* applying the after-image to the meta-data page.
|
|
*/
|
|
lrd->type = cpu_to_le16(LOG_REDOPAGE);
|
|
PXDaddress(page_pxd, mp->index);
|
|
PXDlength(page_pxd,
|
|
mp->logical_size >> tblk->sb->s_blocksize_bits);
|
|
lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, tlck));
|
|
|
|
/* format a maplock for txUpdateMap() to update bPMAP
|
|
* for alloc of new/extended extents of XAD[lwm:next)
|
|
* from the page itself;
|
|
* txUpdateMap() resets (XAD_NEW|XAD_EXTEND) flag.
|
|
*/
|
|
lwm = xtlck->lwm.offset;
|
|
if (lwm == 0)
|
|
lwm = XTPAGEMAXSLOT;
|
|
|
|
if (lwm == next)
|
|
goto out;
|
|
if (lwm > next) {
|
|
jfs_err("xtLog: lwm > next");
|
|
goto out;
|
|
}
|
|
tlck->flag |= tlckUPDATEMAP;
|
|
xadlock->flag = mlckALLOCXADLIST;
|
|
xadlock->count = next - lwm;
|
|
if ((xadlock->count <= 4) && (tblk->xflag & COMMIT_LAZY)) {
|
|
int i;
|
|
pxd_t *pxd;
|
|
/*
|
|
* Lazy commit may allow xtree to be modified before
|
|
* txUpdateMap runs. Copy xad into linelock to
|
|
* preserve correct data.
|
|
*
|
|
* We can fit twice as may pxd's as xads in the lock
|
|
*/
|
|
xadlock->flag = mlckALLOCPXDLIST;
|
|
pxd = xadlock->xdlist = &xtlck->pxdlock;
|
|
for (i = 0; i < xadlock->count; i++) {
|
|
PXDaddress(pxd, addressXAD(&p->xad[lwm + i]));
|
|
PXDlength(pxd, lengthXAD(&p->xad[lwm + i]));
|
|
p->xad[lwm + i].flag &=
|
|
~(XAD_NEW | XAD_EXTENDED);
|
|
pxd++;
|
|
}
|
|
} else {
|
|
/*
|
|
* xdlist will point to into inode's xtree, ensure
|
|
* that transaction is not committed lazily.
|
|
*/
|
|
xadlock->flag = mlckALLOCXADLIST;
|
|
xadlock->xdlist = &p->xad[lwm];
|
|
tblk->xflag &= ~COMMIT_LAZY;
|
|
}
|
|
jfs_info("xtLog: alloc ip:0x%p mp:0x%p tlck:0x%p lwm:%d count:%d",
|
|
tlck->ip, mp, tlck, lwm, xadlock->count);
|
|
|
|
maplock->index = 1;
|
|
|
|
out:
|
|
/* mark page as homeward bound */
|
|
tlck->flag |= tlckWRITEPAGE;
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* page deletion: file deletion/truncation (ref. xtTruncate())
|
|
*
|
|
* (page will be invalidated after log is written and bmap
|
|
* is updated from the page);
|
|
*/
|
|
if (tlck->type & tlckFREE) {
|
|
/* LOG_NOREDOPAGE log for NoRedoPage filter:
|
|
* if page free from file delete, NoRedoFile filter from
|
|
* inode image of zero link count will subsume NoRedoPage
|
|
* filters for each page;
|
|
* if page free from file truncattion, write NoRedoPage
|
|
* filter;
|
|
*
|
|
* upadte of block allocation map for the page itself:
|
|
* if page free from deletion and truncation, LOG_UPDATEMAP
|
|
* log for the page itself is generated from processing
|
|
* its parent page xad entries;
|
|
*/
|
|
/* if page free from file truncation, log LOG_NOREDOPAGE
|
|
* of the deleted page for logredo() to start NoRedoPage
|
|
* filter for the page;
|
|
*/
|
|
if (tblk->xflag & COMMIT_TRUNCATE) {
|
|
/* write NOREDOPAGE for the page */
|
|
lrd->type = cpu_to_le16(LOG_NOREDOPAGE);
|
|
PXDaddress(page_pxd, mp->index);
|
|
PXDlength(page_pxd,
|
|
mp->logical_size >> tblk->sb->
|
|
s_blocksize_bits);
|
|
lrd->backchain =
|
|
cpu_to_le32(lmLog(log, tblk, lrd, NULL));
|
|
|
|
if (tlck->type & tlckBTROOT) {
|
|
/* Empty xtree must be logged */
|
|
lrd->type = cpu_to_le16(LOG_REDOPAGE);
|
|
lrd->backchain =
|
|
cpu_to_le32(lmLog(log, tblk, lrd, tlck));
|
|
}
|
|
}
|
|
|
|
/* init LOG_UPDATEMAP of the freed extents
|
|
* XAD[XTENTRYSTART:hwm) from the deleted page itself
|
|
* for logredo() to update bmap;
|
|
*/
|
|
lrd->type = cpu_to_le16(LOG_UPDATEMAP);
|
|
lrd->log.updatemap.type = cpu_to_le16(LOG_FREEXADLIST);
|
|
xtlck = (struct xtlock *) & tlck->lock;
|
|
hwm = xtlck->hwm.offset;
|
|
lrd->log.updatemap.nxd =
|
|
cpu_to_le16(hwm - XTENTRYSTART + 1);
|
|
/* reformat linelock for lmLog() */
|
|
xtlck->header.offset = XTENTRYSTART;
|
|
xtlck->header.length = hwm - XTENTRYSTART + 1;
|
|
xtlck->index = 1;
|
|
lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, tlck));
|
|
|
|
/* format a maplock for txUpdateMap() to update bmap
|
|
* to free extents of XAD[XTENTRYSTART:hwm) from the
|
|
* deleted page itself;
|
|
*/
|
|
tlck->flag |= tlckUPDATEMAP;
|
|
xadlock->count = hwm - XTENTRYSTART + 1;
|
|
if ((xadlock->count <= 4) && (tblk->xflag & COMMIT_LAZY)) {
|
|
int i;
|
|
pxd_t *pxd;
|
|
/*
|
|
* Lazy commit may allow xtree to be modified before
|
|
* txUpdateMap runs. Copy xad into linelock to
|
|
* preserve correct data.
|
|
*
|
|
* We can fit twice as may pxd's as xads in the lock
|
|
*/
|
|
xadlock->flag = mlckFREEPXDLIST;
|
|
pxd = xadlock->xdlist = &xtlck->pxdlock;
|
|
for (i = 0; i < xadlock->count; i++) {
|
|
PXDaddress(pxd,
|
|
addressXAD(&p->xad[XTENTRYSTART + i]));
|
|
PXDlength(pxd,
|
|
lengthXAD(&p->xad[XTENTRYSTART + i]));
|
|
pxd++;
|
|
}
|
|
} else {
|
|
/*
|
|
* xdlist will point to into inode's xtree, ensure
|
|
* that transaction is not committed lazily.
|
|
*/
|
|
xadlock->flag = mlckFREEXADLIST;
|
|
xadlock->xdlist = &p->xad[XTENTRYSTART];
|
|
tblk->xflag &= ~COMMIT_LAZY;
|
|
}
|
|
jfs_info("xtLog: free ip:0x%p mp:0x%p count:%d lwm:2",
|
|
tlck->ip, mp, xadlock->count);
|
|
|
|
maplock->index = 1;
|
|
|
|
/* mark page as invalid */
|
|
if (((tblk->xflag & COMMIT_PWMAP) || S_ISDIR(ip->i_mode))
|
|
&& !(tlck->type & tlckBTROOT))
|
|
tlck->flag |= tlckFREEPAGE;
|
|
/*
|
|
else (tblk->xflag & COMMIT_PMAP)
|
|
? release the page;
|
|
*/
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* page/entry truncation: file truncation (ref. xtTruncate())
|
|
*
|
|
* |----------+------+------+---------------|
|
|
* | | |
|
|
* | | hwm - hwm before truncation
|
|
* | next - truncation point
|
|
* lwm - lwm before truncation
|
|
* header ?
|
|
*/
|
|
if (tlck->type & tlckTRUNCATE) {
|
|
pxd_t pxd; /* truncated extent of xad */
|
|
int twm;
|
|
|
|
/*
|
|
* For truncation the entire linelock may be used, so it would
|
|
* be difficult to store xad list in linelock itself.
|
|
* Therefore, we'll just force transaction to be committed
|
|
* synchronously, so that xtree pages won't be changed before
|
|
* txUpdateMap runs.
|
|
*/
|
|
tblk->xflag &= ~COMMIT_LAZY;
|
|
lwm = xtlck->lwm.offset;
|
|
if (lwm == 0)
|
|
lwm = XTPAGEMAXSLOT;
|
|
hwm = xtlck->hwm.offset;
|
|
twm = xtlck->twm.offset;
|
|
|
|
/*
|
|
* write log records
|
|
*/
|
|
/* log after-image for logredo():
|
|
*
|
|
* logredo() will update bmap for alloc of new/extended
|
|
* extents (XAD_NEW|XAD_EXTEND) of XAD[lwm:next) from
|
|
* after-image of XADlist;
|
|
* logredo() resets (XAD_NEW|XAD_EXTEND) flag when
|
|
* applying the after-image to the meta-data page.
|
|
*/
|
|
lrd->type = cpu_to_le16(LOG_REDOPAGE);
|
|
PXDaddress(page_pxd, mp->index);
|
|
PXDlength(page_pxd,
|
|
mp->logical_size >> tblk->sb->s_blocksize_bits);
|
|
lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, tlck));
|
|
|
|
/*
|
|
* truncate entry XAD[twm == next - 1]:
|
|
*/
|
|
if (twm == next - 1) {
|
|
/* init LOG_UPDATEMAP for logredo() to update bmap for
|
|
* free of truncated delta extent of the truncated
|
|
* entry XAD[next - 1]:
|
|
* (xtlck->pxdlock = truncated delta extent);
|
|
*/
|
|
pxdlock = (struct pxd_lock *) & xtlck->pxdlock;
|
|
/* assert(pxdlock->type & tlckTRUNCATE); */
|
|
lrd->type = cpu_to_le16(LOG_UPDATEMAP);
|
|
lrd->log.updatemap.type = cpu_to_le16(LOG_FREEPXD);
|
|
lrd->log.updatemap.nxd = cpu_to_le16(1);
|
|
lrd->log.updatemap.pxd = pxdlock->pxd;
|
|
pxd = pxdlock->pxd; /* save to format maplock */
|
|
lrd->backchain =
|
|
cpu_to_le32(lmLog(log, tblk, lrd, NULL));
|
|
}
|
|
|
|
/*
|
|
* free entries XAD[next:hwm]:
|
|
*/
|
|
if (hwm >= next) {
|
|
/* init LOG_UPDATEMAP of the freed extents
|
|
* XAD[next:hwm] from the deleted page itself
|
|
* for logredo() to update bmap;
|
|
*/
|
|
lrd->type = cpu_to_le16(LOG_UPDATEMAP);
|
|
lrd->log.updatemap.type =
|
|
cpu_to_le16(LOG_FREEXADLIST);
|
|
xtlck = (struct xtlock *) & tlck->lock;
|
|
hwm = xtlck->hwm.offset;
|
|
lrd->log.updatemap.nxd =
|
|
cpu_to_le16(hwm - next + 1);
|
|
/* reformat linelock for lmLog() */
|
|
xtlck->header.offset = next;
|
|
xtlck->header.length = hwm - next + 1;
|
|
xtlck->index = 1;
|
|
lrd->backchain =
|
|
cpu_to_le32(lmLog(log, tblk, lrd, tlck));
|
|
}
|
|
|
|
/*
|
|
* format maplock(s) for txUpdateMap() to update bmap
|
|
*/
|
|
maplock->index = 0;
|
|
|
|
/*
|
|
* allocate entries XAD[lwm:next):
|
|
*/
|
|
if (lwm < next) {
|
|
/* format a maplock for txUpdateMap() to update bPMAP
|
|
* for alloc of new/extended extents of XAD[lwm:next)
|
|
* from the page itself;
|
|
* txUpdateMap() resets (XAD_NEW|XAD_EXTEND) flag.
|
|
*/
|
|
tlck->flag |= tlckUPDATEMAP;
|
|
xadlock->flag = mlckALLOCXADLIST;
|
|
xadlock->count = next - lwm;
|
|
xadlock->xdlist = &p->xad[lwm];
|
|
|
|
jfs_info("xtLog: alloc ip:0x%p mp:0x%p count:%d lwm:%d next:%d",
|
|
tlck->ip, mp, xadlock->count, lwm, next);
|
|
maplock->index++;
|
|
xadlock++;
|
|
}
|
|
|
|
/*
|
|
* truncate entry XAD[twm == next - 1]:
|
|
*/
|
|
if (twm == next - 1) {
|
|
/* format a maplock for txUpdateMap() to update bmap
|
|
* to free truncated delta extent of the truncated
|
|
* entry XAD[next - 1];
|
|
* (xtlck->pxdlock = truncated delta extent);
|
|
*/
|
|
tlck->flag |= tlckUPDATEMAP;
|
|
pxdlock = (struct pxd_lock *) xadlock;
|
|
pxdlock->flag = mlckFREEPXD;
|
|
pxdlock->count = 1;
|
|
pxdlock->pxd = pxd;
|
|
|
|
jfs_info("xtLog: truncate ip:0x%p mp:0x%p count:%d hwm:%d",
|
|
ip, mp, pxdlock->count, hwm);
|
|
maplock->index++;
|
|
xadlock++;
|
|
}
|
|
|
|
/*
|
|
* free entries XAD[next:hwm]:
|
|
*/
|
|
if (hwm >= next) {
|
|
/* format a maplock for txUpdateMap() to update bmap
|
|
* to free extents of XAD[next:hwm] from thedeleted
|
|
* page itself;
|
|
*/
|
|
tlck->flag |= tlckUPDATEMAP;
|
|
xadlock->flag = mlckFREEXADLIST;
|
|
xadlock->count = hwm - next + 1;
|
|
xadlock->xdlist = &p->xad[next];
|
|
|
|
jfs_info("xtLog: free ip:0x%p mp:0x%p count:%d next:%d hwm:%d",
|
|
tlck->ip, mp, xadlock->count, next, hwm);
|
|
maplock->index++;
|
|
}
|
|
|
|
/* mark page as homeward bound */
|
|
tlck->flag |= tlckWRITEPAGE;
|
|
}
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* mapLog()
|
|
*
|
|
* function: log from maplock of freed data extents;
|
|
*/
|
|
static void mapLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
|
|
struct tlock * tlck)
|
|
{
|
|
struct pxd_lock *pxdlock;
|
|
int i, nlock;
|
|
pxd_t *pxd;
|
|
|
|
/*
|
|
* page relocation: free the source page extent
|
|
*
|
|
* a maplock for txUpdateMap() for free of the page
|
|
* has been formatted at txLock() time saving the src
|
|
* relocated page address;
|
|
*/
|
|
if (tlck->type & tlckRELOCATE) {
|
|
/* log LOG_NOREDOPAGE of the old relocated page
|
|
* for logredo() to start NoRedoPage filter;
|
|
*/
|
|
lrd->type = cpu_to_le16(LOG_NOREDOPAGE);
|
|
pxdlock = (struct pxd_lock *) & tlck->lock;
|
|
pxd = &lrd->log.redopage.pxd;
|
|
*pxd = pxdlock->pxd;
|
|
lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, NULL));
|
|
|
|
/* (N.B. currently, logredo() does NOT update bmap
|
|
* for free of the page itself for (LOG_XTREE|LOG_NOREDOPAGE);
|
|
* if page free from relocation, LOG_UPDATEMAP log is
|
|
* specifically generated now for logredo()
|
|
* to update bmap for free of src relocated page;
|
|
* (new flag LOG_RELOCATE may be introduced which will
|
|
* inform logredo() to start NORedoPage filter and also
|
|
* update block allocation map at the same time, thus
|
|
* avoiding an extra log write);
|
|
*/
|
|
lrd->type = cpu_to_le16(LOG_UPDATEMAP);
|
|
lrd->log.updatemap.type = cpu_to_le16(LOG_FREEPXD);
|
|
lrd->log.updatemap.nxd = cpu_to_le16(1);
|
|
lrd->log.updatemap.pxd = pxdlock->pxd;
|
|
lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, NULL));
|
|
|
|
/* a maplock for txUpdateMap() for free of the page
|
|
* has been formatted at txLock() time;
|
|
*/
|
|
tlck->flag |= tlckUPDATEMAP;
|
|
return;
|
|
}
|
|
/*
|
|
|
|
* Otherwise it's not a relocate request
|
|
*
|
|
*/
|
|
else {
|
|
/* log LOG_UPDATEMAP for logredo() to update bmap for
|
|
* free of truncated/relocated delta extent of the data;
|
|
* e.g.: external EA extent, relocated/truncated extent
|
|
* from xtTailgate();
|
|
*/
|
|
lrd->type = cpu_to_le16(LOG_UPDATEMAP);
|
|
pxdlock = (struct pxd_lock *) & tlck->lock;
|
|
nlock = pxdlock->index;
|
|
for (i = 0; i < nlock; i++, pxdlock++) {
|
|
if (pxdlock->flag & mlckALLOCPXD)
|
|
lrd->log.updatemap.type =
|
|
cpu_to_le16(LOG_ALLOCPXD);
|
|
else
|
|
lrd->log.updatemap.type =
|
|
cpu_to_le16(LOG_FREEPXD);
|
|
lrd->log.updatemap.nxd = cpu_to_le16(1);
|
|
lrd->log.updatemap.pxd = pxdlock->pxd;
|
|
lrd->backchain =
|
|
cpu_to_le32(lmLog(log, tblk, lrd, NULL));
|
|
jfs_info("mapLog: xaddr:0x%lx xlen:0x%x",
|
|
(ulong) addressPXD(&pxdlock->pxd),
|
|
lengthPXD(&pxdlock->pxd));
|
|
}
|
|
|
|
/* update bmap */
|
|
tlck->flag |= tlckUPDATEMAP;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* txEA()
|
|
*
|
|
* function: acquire maplock for EA/ACL extents or
|
|
* set COMMIT_INLINE flag;
|
|
*/
|
|
void txEA(tid_t tid, struct inode *ip, dxd_t * oldea, dxd_t * newea)
|
|
{
|
|
struct tlock *tlck = NULL;
|
|
struct pxd_lock *maplock = NULL, *pxdlock = NULL;
|
|
|
|
/*
|
|
* format maplock for alloc of new EA extent
|
|
*/
|
|
if (newea) {
|
|
/* Since the newea could be a completely zeroed entry we need to
|
|
* check for the two flags which indicate we should actually
|
|
* commit new EA data
|
|
*/
|
|
if (newea->flag & DXD_EXTENT) {
|
|
tlck = txMaplock(tid, ip, tlckMAP);
|
|
maplock = (struct pxd_lock *) & tlck->lock;
|
|
pxdlock = (struct pxd_lock *) maplock;
|
|
pxdlock->flag = mlckALLOCPXD;
|
|
PXDaddress(&pxdlock->pxd, addressDXD(newea));
|
|
PXDlength(&pxdlock->pxd, lengthDXD(newea));
|
|
pxdlock++;
|
|
maplock->index = 1;
|
|
} else if (newea->flag & DXD_INLINE) {
|
|
tlck = NULL;
|
|
|
|
set_cflag(COMMIT_Inlineea, ip);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* format maplock for free of old EA extent
|
|
*/
|
|
if (!test_cflag(COMMIT_Nolink, ip) && oldea->flag & DXD_EXTENT) {
|
|
if (tlck == NULL) {
|
|
tlck = txMaplock(tid, ip, tlckMAP);
|
|
maplock = (struct pxd_lock *) & tlck->lock;
|
|
pxdlock = (struct pxd_lock *) maplock;
|
|
maplock->index = 0;
|
|
}
|
|
pxdlock->flag = mlckFREEPXD;
|
|
PXDaddress(&pxdlock->pxd, addressDXD(oldea));
|
|
PXDlength(&pxdlock->pxd, lengthDXD(oldea));
|
|
maplock->index++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* txForce()
|
|
*
|
|
* function: synchronously write pages locked by transaction
|
|
* after txLog() but before txUpdateMap();
|
|
*/
|
|
static void txForce(struct tblock * tblk)
|
|
{
|
|
struct tlock *tlck;
|
|
lid_t lid, next;
|
|
struct metapage *mp;
|
|
|
|
/*
|
|
* reverse the order of transaction tlocks in
|
|
* careful update order of address index pages
|
|
* (right to left, bottom up)
|
|
*/
|
|
tlck = lid_to_tlock(tblk->next);
|
|
lid = tlck->next;
|
|
tlck->next = 0;
|
|
while (lid) {
|
|
tlck = lid_to_tlock(lid);
|
|
next = tlck->next;
|
|
tlck->next = tblk->next;
|
|
tblk->next = lid;
|
|
lid = next;
|
|
}
|
|
|
|
/*
|
|
* synchronously write the page, and
|
|
* hold the page for txUpdateMap();
|
|
*/
|
|
for (lid = tblk->next; lid; lid = next) {
|
|
tlck = lid_to_tlock(lid);
|
|
next = tlck->next;
|
|
|
|
if ((mp = tlck->mp) != NULL &&
|
|
(tlck->type & tlckBTROOT) == 0) {
|
|
assert(mp->xflag & COMMIT_PAGE);
|
|
|
|
if (tlck->flag & tlckWRITEPAGE) {
|
|
tlck->flag &= ~tlckWRITEPAGE;
|
|
|
|
/* do not release page to freelist */
|
|
force_metapage(mp);
|
|
#if 0
|
|
/*
|
|
* The "right" thing to do here is to
|
|
* synchronously write the metadata.
|
|
* With the current implementation this
|
|
* is hard since write_metapage requires
|
|
* us to kunmap & remap the page. If we
|
|
* have tlocks pointing into the metadata
|
|
* pages, we don't want to do this. I think
|
|
* we can get by with synchronously writing
|
|
* the pages when they are released.
|
|
*/
|
|
assert(mp->nohomeok);
|
|
set_bit(META_dirty, &mp->flag);
|
|
set_bit(META_sync, &mp->flag);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* txUpdateMap()
|
|
*
|
|
* function: update persistent allocation map (and working map
|
|
* if appropriate);
|
|
*
|
|
* parameter:
|
|
*/
|
|
static void txUpdateMap(struct tblock * tblk)
|
|
{
|
|
struct inode *ip;
|
|
struct inode *ipimap;
|
|
lid_t lid;
|
|
struct tlock *tlck;
|
|
struct maplock *maplock;
|
|
struct pxd_lock pxdlock;
|
|
int maptype;
|
|
int k, nlock;
|
|
struct metapage *mp = NULL;
|
|
|
|
ipimap = JFS_SBI(tblk->sb)->ipimap;
|
|
|
|
maptype = (tblk->xflag & COMMIT_PMAP) ? COMMIT_PMAP : COMMIT_PWMAP;
|
|
|
|
|
|
/*
|
|
* update block allocation map
|
|
*
|
|
* update allocation state in pmap (and wmap) and
|
|
* update lsn of the pmap page;
|
|
*/
|
|
/*
|
|
* scan each tlock/page of transaction for block allocation/free:
|
|
*
|
|
* for each tlock/page of transaction, update map.
|
|
* ? are there tlock for pmap and pwmap at the same time ?
|
|
*/
|
|
for (lid = tblk->next; lid; lid = tlck->next) {
|
|
tlck = lid_to_tlock(lid);
|
|
|
|
if ((tlck->flag & tlckUPDATEMAP) == 0)
|
|
continue;
|
|
|
|
if (tlck->flag & tlckFREEPAGE) {
|
|
/*
|
|
* Another thread may attempt to reuse freed space
|
|
* immediately, so we want to get rid of the metapage
|
|
* before anyone else has a chance to get it.
|
|
* Lock metapage, update maps, then invalidate
|
|
* the metapage.
|
|
*/
|
|
mp = tlck->mp;
|
|
ASSERT(mp->xflag & COMMIT_PAGE);
|
|
grab_metapage(mp);
|
|
}
|
|
|
|
/*
|
|
* extent list:
|
|
* . in-line PXD list:
|
|
* . out-of-line XAD list:
|
|
*/
|
|
maplock = (struct maplock *) & tlck->lock;
|
|
nlock = maplock->index;
|
|
|
|
for (k = 0; k < nlock; k++, maplock++) {
|
|
/*
|
|
* allocate blocks in persistent map:
|
|
*
|
|
* blocks have been allocated from wmap at alloc time;
|
|
*/
|
|
if (maplock->flag & mlckALLOC) {
|
|
txAllocPMap(ipimap, maplock, tblk);
|
|
}
|
|
/*
|
|
* free blocks in persistent and working map:
|
|
* blocks will be freed in pmap and then in wmap;
|
|
*
|
|
* ? tblock specifies the PMAP/PWMAP based upon
|
|
* transaction
|
|
*
|
|
* free blocks in persistent map:
|
|
* blocks will be freed from wmap at last reference
|
|
* release of the object for regular files;
|
|
*
|
|
* Alway free blocks from both persistent & working
|
|
* maps for directories
|
|
*/
|
|
else { /* (maplock->flag & mlckFREE) */
|
|
|
|
if (tlck->flag & tlckDIRECTORY)
|
|
txFreeMap(ipimap, maplock,
|
|
tblk, COMMIT_PWMAP);
|
|
else
|
|
txFreeMap(ipimap, maplock,
|
|
tblk, maptype);
|
|
}
|
|
}
|
|
if (tlck->flag & tlckFREEPAGE) {
|
|
if (!(tblk->flag & tblkGC_LAZY)) {
|
|
/* This is equivalent to txRelease */
|
|
ASSERT(mp->lid == lid);
|
|
tlck->mp->lid = 0;
|
|
}
|
|
assert(mp->nohomeok == 1);
|
|
metapage_homeok(mp);
|
|
discard_metapage(mp);
|
|
tlck->mp = NULL;
|
|
}
|
|
}
|
|
/*
|
|
* update inode allocation map
|
|
*
|
|
* update allocation state in pmap and
|
|
* update lsn of the pmap page;
|
|
* update in-memory inode flag/state
|
|
*
|
|
* unlock mapper/write lock
|
|
*/
|
|
if (tblk->xflag & COMMIT_CREATE) {
|
|
diUpdatePMap(ipimap, tblk->ino, false, tblk);
|
|
/* update persistent block allocation map
|
|
* for the allocation of inode extent;
|
|
*/
|
|
pxdlock.flag = mlckALLOCPXD;
|
|
pxdlock.pxd = tblk->u.ixpxd;
|
|
pxdlock.index = 1;
|
|
txAllocPMap(ipimap, (struct maplock *) & pxdlock, tblk);
|
|
} else if (tblk->xflag & COMMIT_DELETE) {
|
|
ip = tblk->u.ip;
|
|
diUpdatePMap(ipimap, ip->i_ino, true, tblk);
|
|
iput(ip);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* txAllocPMap()
|
|
*
|
|
* function: allocate from persistent map;
|
|
*
|
|
* parameter:
|
|
* ipbmap -
|
|
* malock -
|
|
* xad list:
|
|
* pxd:
|
|
*
|
|
* maptype -
|
|
* allocate from persistent map;
|
|
* free from persistent map;
|
|
* (e.g., tmp file - free from working map at releae
|
|
* of last reference);
|
|
* free from persistent and working map;
|
|
*
|
|
* lsn - log sequence number;
|
|
*/
|
|
static void txAllocPMap(struct inode *ip, struct maplock * maplock,
|
|
struct tblock * tblk)
|
|
{
|
|
struct inode *ipbmap = JFS_SBI(ip->i_sb)->ipbmap;
|
|
struct xdlistlock *xadlistlock;
|
|
xad_t *xad;
|
|
s64 xaddr;
|
|
int xlen;
|
|
struct pxd_lock *pxdlock;
|
|
struct xdlistlock *pxdlistlock;
|
|
pxd_t *pxd;
|
|
int n;
|
|
|
|
/*
|
|
* allocate from persistent map;
|
|
*/
|
|
if (maplock->flag & mlckALLOCXADLIST) {
|
|
xadlistlock = (struct xdlistlock *) maplock;
|
|
xad = xadlistlock->xdlist;
|
|
for (n = 0; n < xadlistlock->count; n++, xad++) {
|
|
if (xad->flag & (XAD_NEW | XAD_EXTENDED)) {
|
|
xaddr = addressXAD(xad);
|
|
xlen = lengthXAD(xad);
|
|
dbUpdatePMap(ipbmap, false, xaddr,
|
|
(s64) xlen, tblk);
|
|
xad->flag &= ~(XAD_NEW | XAD_EXTENDED);
|
|
jfs_info("allocPMap: xaddr:0x%lx xlen:%d",
|
|
(ulong) xaddr, xlen);
|
|
}
|
|
}
|
|
} else if (maplock->flag & mlckALLOCPXD) {
|
|
pxdlock = (struct pxd_lock *) maplock;
|
|
xaddr = addressPXD(&pxdlock->pxd);
|
|
xlen = lengthPXD(&pxdlock->pxd);
|
|
dbUpdatePMap(ipbmap, false, xaddr, (s64) xlen, tblk);
|
|
jfs_info("allocPMap: xaddr:0x%lx xlen:%d", (ulong) xaddr, xlen);
|
|
} else { /* (maplock->flag & mlckALLOCPXDLIST) */
|
|
|
|
pxdlistlock = (struct xdlistlock *) maplock;
|
|
pxd = pxdlistlock->xdlist;
|
|
for (n = 0; n < pxdlistlock->count; n++, pxd++) {
|
|
xaddr = addressPXD(pxd);
|
|
xlen = lengthPXD(pxd);
|
|
dbUpdatePMap(ipbmap, false, xaddr, (s64) xlen,
|
|
tblk);
|
|
jfs_info("allocPMap: xaddr:0x%lx xlen:%d",
|
|
(ulong) xaddr, xlen);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* txFreeMap()
|
|
*
|
|
* function: free from persistent and/or working map;
|
|
*
|
|
* todo: optimization
|
|
*/
|
|
void txFreeMap(struct inode *ip,
|
|
struct maplock * maplock, struct tblock * tblk, int maptype)
|
|
{
|
|
struct inode *ipbmap = JFS_SBI(ip->i_sb)->ipbmap;
|
|
struct xdlistlock *xadlistlock;
|
|
xad_t *xad;
|
|
s64 xaddr;
|
|
int xlen;
|
|
struct pxd_lock *pxdlock;
|
|
struct xdlistlock *pxdlistlock;
|
|
pxd_t *pxd;
|
|
int n;
|
|
|
|
jfs_info("txFreeMap: tblk:0x%p maplock:0x%p maptype:0x%x",
|
|
tblk, maplock, maptype);
|
|
|
|
/*
|
|
* free from persistent map;
|
|
*/
|
|
if (maptype == COMMIT_PMAP || maptype == COMMIT_PWMAP) {
|
|
if (maplock->flag & mlckFREEXADLIST) {
|
|
xadlistlock = (struct xdlistlock *) maplock;
|
|
xad = xadlistlock->xdlist;
|
|
for (n = 0; n < xadlistlock->count; n++, xad++) {
|
|
if (!(xad->flag & XAD_NEW)) {
|
|
xaddr = addressXAD(xad);
|
|
xlen = lengthXAD(xad);
|
|
dbUpdatePMap(ipbmap, true, xaddr,
|
|
(s64) xlen, tblk);
|
|
jfs_info("freePMap: xaddr:0x%lx xlen:%d",
|
|
(ulong) xaddr, xlen);
|
|
}
|
|
}
|
|
} else if (maplock->flag & mlckFREEPXD) {
|
|
pxdlock = (struct pxd_lock *) maplock;
|
|
xaddr = addressPXD(&pxdlock->pxd);
|
|
xlen = lengthPXD(&pxdlock->pxd);
|
|
dbUpdatePMap(ipbmap, true, xaddr, (s64) xlen,
|
|
tblk);
|
|
jfs_info("freePMap: xaddr:0x%lx xlen:%d",
|
|
(ulong) xaddr, xlen);
|
|
} else { /* (maplock->flag & mlckALLOCPXDLIST) */
|
|
|
|
pxdlistlock = (struct xdlistlock *) maplock;
|
|
pxd = pxdlistlock->xdlist;
|
|
for (n = 0; n < pxdlistlock->count; n++, pxd++) {
|
|
xaddr = addressPXD(pxd);
|
|
xlen = lengthPXD(pxd);
|
|
dbUpdatePMap(ipbmap, true, xaddr,
|
|
(s64) xlen, tblk);
|
|
jfs_info("freePMap: xaddr:0x%lx xlen:%d",
|
|
(ulong) xaddr, xlen);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* free from working map;
|
|
*/
|
|
if (maptype == COMMIT_PWMAP || maptype == COMMIT_WMAP) {
|
|
if (maplock->flag & mlckFREEXADLIST) {
|
|
xadlistlock = (struct xdlistlock *) maplock;
|
|
xad = xadlistlock->xdlist;
|
|
for (n = 0; n < xadlistlock->count; n++, xad++) {
|
|
xaddr = addressXAD(xad);
|
|
xlen = lengthXAD(xad);
|
|
dbFree(ip, xaddr, (s64) xlen);
|
|
xad->flag = 0;
|
|
jfs_info("freeWMap: xaddr:0x%lx xlen:%d",
|
|
(ulong) xaddr, xlen);
|
|
}
|
|
} else if (maplock->flag & mlckFREEPXD) {
|
|
pxdlock = (struct pxd_lock *) maplock;
|
|
xaddr = addressPXD(&pxdlock->pxd);
|
|
xlen = lengthPXD(&pxdlock->pxd);
|
|
dbFree(ip, xaddr, (s64) xlen);
|
|
jfs_info("freeWMap: xaddr:0x%lx xlen:%d",
|
|
(ulong) xaddr, xlen);
|
|
} else { /* (maplock->flag & mlckFREEPXDLIST) */
|
|
|
|
pxdlistlock = (struct xdlistlock *) maplock;
|
|
pxd = pxdlistlock->xdlist;
|
|
for (n = 0; n < pxdlistlock->count; n++, pxd++) {
|
|
xaddr = addressPXD(pxd);
|
|
xlen = lengthPXD(pxd);
|
|
dbFree(ip, xaddr, (s64) xlen);
|
|
jfs_info("freeWMap: xaddr:0x%lx xlen:%d",
|
|
(ulong) xaddr, xlen);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* txFreelock()
|
|
*
|
|
* function: remove tlock from inode anonymous locklist
|
|
*/
|
|
void txFreelock(struct inode *ip)
|
|
{
|
|
struct jfs_inode_info *jfs_ip = JFS_IP(ip);
|
|
struct tlock *xtlck, *tlck;
|
|
lid_t xlid = 0, lid;
|
|
|
|
if (!jfs_ip->atlhead)
|
|
return;
|
|
|
|
TXN_LOCK();
|
|
xtlck = (struct tlock *) &jfs_ip->atlhead;
|
|
|
|
while ((lid = xtlck->next) != 0) {
|
|
tlck = lid_to_tlock(lid);
|
|
if (tlck->flag & tlckFREELOCK) {
|
|
xtlck->next = tlck->next;
|
|
txLockFree(lid);
|
|
} else {
|
|
xtlck = tlck;
|
|
xlid = lid;
|
|
}
|
|
}
|
|
|
|
if (jfs_ip->atlhead)
|
|
jfs_ip->atltail = xlid;
|
|
else {
|
|
jfs_ip->atltail = 0;
|
|
/*
|
|
* If inode was on anon_list, remove it
|
|
*/
|
|
list_del_init(&jfs_ip->anon_inode_list);
|
|
}
|
|
TXN_UNLOCK();
|
|
}
|
|
|
|
/*
|
|
* txAbort()
|
|
*
|
|
* function: abort tx before commit;
|
|
*
|
|
* frees line-locks and segment locks for all
|
|
* segments in comdata structure.
|
|
* Optionally sets state of file-system to FM_DIRTY in super-block.
|
|
* log age of page-frames in memory for which caller has
|
|
* are reset to 0 (to avoid logwarap).
|
|
*/
|
|
void txAbort(tid_t tid, int dirty)
|
|
{
|
|
lid_t lid, next;
|
|
struct metapage *mp;
|
|
struct tblock *tblk = tid_to_tblock(tid);
|
|
struct tlock *tlck;
|
|
|
|
/*
|
|
* free tlocks of the transaction
|
|
*/
|
|
for (lid = tblk->next; lid; lid = next) {
|
|
tlck = lid_to_tlock(lid);
|
|
next = tlck->next;
|
|
mp = tlck->mp;
|
|
JFS_IP(tlck->ip)->xtlid = 0;
|
|
|
|
if (mp) {
|
|
mp->lid = 0;
|
|
|
|
/*
|
|
* reset lsn of page to avoid logwarap:
|
|
*
|
|
* (page may have been previously committed by another
|
|
* transaction(s) but has not been paged, i.e.,
|
|
* it may be on logsync list even though it has not
|
|
* been logged for the current tx.)
|
|
*/
|
|
if (mp->xflag & COMMIT_PAGE && mp->lsn)
|
|
LogSyncRelease(mp);
|
|
}
|
|
/* insert tlock at head of freelist */
|
|
TXN_LOCK();
|
|
txLockFree(lid);
|
|
TXN_UNLOCK();
|
|
}
|
|
|
|
/* caller will free the transaction block */
|
|
|
|
tblk->next = tblk->last = 0;
|
|
|
|
/*
|
|
* mark filesystem dirty
|
|
*/
|
|
if (dirty)
|
|
jfs_error(tblk->sb, "\n");
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* txLazyCommit(void)
|
|
*
|
|
* All transactions except those changing ipimap (COMMIT_FORCE) are
|
|
* processed by this routine. This insures that the inode and block
|
|
* allocation maps are updated in order. For synchronous transactions,
|
|
* let the user thread finish processing after txUpdateMap() is called.
|
|
*/
|
|
static void txLazyCommit(struct tblock * tblk)
|
|
{
|
|
struct jfs_log *log;
|
|
|
|
while (((tblk->flag & tblkGC_READY) == 0) &&
|
|
((tblk->flag & tblkGC_UNLOCKED) == 0)) {
|
|
/* We must have gotten ahead of the user thread
|
|
*/
|
|
jfs_info("jfs_lazycommit: tblk 0x%p not unlocked", tblk);
|
|
yield();
|
|
}
|
|
|
|
jfs_info("txLazyCommit: processing tblk 0x%p", tblk);
|
|
|
|
txUpdateMap(tblk);
|
|
|
|
log = (struct jfs_log *) JFS_SBI(tblk->sb)->log;
|
|
|
|
spin_lock_irq(&log->gclock); // LOGGC_LOCK
|
|
|
|
tblk->flag |= tblkGC_COMMITTED;
|
|
|
|
if (tblk->flag & tblkGC_READY)
|
|
log->gcrtc--;
|
|
|
|
wake_up_all(&tblk->gcwait); // LOGGC_WAKEUP
|
|
|
|
/*
|
|
* Can't release log->gclock until we've tested tblk->flag
|
|
*/
|
|
if (tblk->flag & tblkGC_LAZY) {
|
|
spin_unlock_irq(&log->gclock); // LOGGC_UNLOCK
|
|
txUnlock(tblk);
|
|
tblk->flag &= ~tblkGC_LAZY;
|
|
txEnd(tblk - TxBlock); /* Convert back to tid */
|
|
} else
|
|
spin_unlock_irq(&log->gclock); // LOGGC_UNLOCK
|
|
|
|
jfs_info("txLazyCommit: done: tblk = 0x%p", tblk);
|
|
}
|
|
|
|
/*
|
|
* jfs_lazycommit(void)
|
|
*
|
|
* To be run as a kernel daemon. If lbmIODone is called in an interrupt
|
|
* context, or where blocking is not wanted, this routine will process
|
|
* committed transactions from the unlock queue.
|
|
*/
|
|
int jfs_lazycommit(void *arg)
|
|
{
|
|
int WorkDone;
|
|
struct tblock *tblk;
|
|
unsigned long flags;
|
|
struct jfs_sb_info *sbi;
|
|
|
|
do {
|
|
LAZY_LOCK(flags);
|
|
jfs_commit_thread_waking = 0; /* OK to wake another thread */
|
|
while (!list_empty(&TxAnchor.unlock_queue)) {
|
|
WorkDone = 0;
|
|
list_for_each_entry(tblk, &TxAnchor.unlock_queue,
|
|
cqueue) {
|
|
|
|
sbi = JFS_SBI(tblk->sb);
|
|
/*
|
|
* For each volume, the transactions must be
|
|
* handled in order. If another commit thread
|
|
* is handling a tblk for this superblock,
|
|
* skip it
|
|
*/
|
|
if (sbi->commit_state & IN_LAZYCOMMIT)
|
|
continue;
|
|
|
|
sbi->commit_state |= IN_LAZYCOMMIT;
|
|
WorkDone = 1;
|
|
|
|
/*
|
|
* Remove transaction from queue
|
|
*/
|
|
list_del(&tblk->cqueue);
|
|
|
|
LAZY_UNLOCK(flags);
|
|
txLazyCommit(tblk);
|
|
LAZY_LOCK(flags);
|
|
|
|
sbi->commit_state &= ~IN_LAZYCOMMIT;
|
|
/*
|
|
* Don't continue in the for loop. (We can't
|
|
* anyway, it's unsafe!) We want to go back to
|
|
* the beginning of the list.
|
|
*/
|
|
break;
|
|
}
|
|
|
|
/* If there was nothing to do, don't continue */
|
|
if (!WorkDone)
|
|
break;
|
|
}
|
|
/* In case a wakeup came while all threads were active */
|
|
jfs_commit_thread_waking = 0;
|
|
|
|
if (freezing(current)) {
|
|
LAZY_UNLOCK(flags);
|
|
try_to_freeze();
|
|
} else {
|
|
DECLARE_WAITQUEUE(wq, current);
|
|
|
|
add_wait_queue(&jfs_commit_thread_wait, &wq);
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
LAZY_UNLOCK(flags);
|
|
schedule();
|
|
remove_wait_queue(&jfs_commit_thread_wait, &wq);
|
|
}
|
|
} while (!kthread_should_stop());
|
|
|
|
if (!list_empty(&TxAnchor.unlock_queue))
|
|
jfs_err("jfs_lazycommit being killed w/pending transactions!");
|
|
else
|
|
jfs_info("jfs_lazycommit being killed");
|
|
return 0;
|
|
}
|
|
|
|
void txLazyUnlock(struct tblock * tblk)
|
|
{
|
|
unsigned long flags;
|
|
|
|
LAZY_LOCK(flags);
|
|
|
|
list_add_tail(&tblk->cqueue, &TxAnchor.unlock_queue);
|
|
/*
|
|
* Don't wake up a commit thread if there is already one servicing
|
|
* this superblock, or if the last one we woke up hasn't started yet.
|
|
*/
|
|
if (!(JFS_SBI(tblk->sb)->commit_state & IN_LAZYCOMMIT) &&
|
|
!jfs_commit_thread_waking) {
|
|
jfs_commit_thread_waking = 1;
|
|
wake_up(&jfs_commit_thread_wait);
|
|
}
|
|
LAZY_UNLOCK(flags);
|
|
}
|
|
|
|
static void LogSyncRelease(struct metapage * mp)
|
|
{
|
|
struct jfs_log *log = mp->log;
|
|
|
|
assert(mp->nohomeok);
|
|
assert(log);
|
|
metapage_homeok(mp);
|
|
}
|
|
|
|
/*
|
|
* txQuiesce
|
|
*
|
|
* Block all new transactions and push anonymous transactions to
|
|
* completion
|
|
*
|
|
* This does almost the same thing as jfs_sync below. We don't
|
|
* worry about deadlocking when jfs_tlocks_low is set, since we would
|
|
* expect jfs_sync to get us out of that jam.
|
|
*/
|
|
void txQuiesce(struct super_block *sb)
|
|
{
|
|
struct inode *ip;
|
|
struct jfs_inode_info *jfs_ip;
|
|
struct jfs_log *log = JFS_SBI(sb)->log;
|
|
tid_t tid;
|
|
|
|
set_bit(log_QUIESCE, &log->flag);
|
|
|
|
TXN_LOCK();
|
|
restart:
|
|
while (!list_empty(&TxAnchor.anon_list)) {
|
|
jfs_ip = list_entry(TxAnchor.anon_list.next,
|
|
struct jfs_inode_info,
|
|
anon_inode_list);
|
|
ip = &jfs_ip->vfs_inode;
|
|
|
|
/*
|
|
* inode will be removed from anonymous list
|
|
* when it is committed
|
|
*/
|
|
TXN_UNLOCK();
|
|
tid = txBegin(ip->i_sb, COMMIT_INODE | COMMIT_FORCE);
|
|
mutex_lock(&jfs_ip->commit_mutex);
|
|
txCommit(tid, 1, &ip, 0);
|
|
txEnd(tid);
|
|
mutex_unlock(&jfs_ip->commit_mutex);
|
|
/*
|
|
* Just to be safe. I don't know how
|
|
* long we can run without blocking
|
|
*/
|
|
cond_resched();
|
|
TXN_LOCK();
|
|
}
|
|
|
|
/*
|
|
* If jfs_sync is running in parallel, there could be some inodes
|
|
* on anon_list2. Let's check.
|
|
*/
|
|
if (!list_empty(&TxAnchor.anon_list2)) {
|
|
list_splice_init(&TxAnchor.anon_list2, &TxAnchor.anon_list);
|
|
goto restart;
|
|
}
|
|
TXN_UNLOCK();
|
|
|
|
/*
|
|
* We may need to kick off the group commit
|
|
*/
|
|
jfs_flush_journal(log, 0);
|
|
}
|
|
|
|
/*
|
|
* txResume()
|
|
*
|
|
* Allows transactions to start again following txQuiesce
|
|
*/
|
|
void txResume(struct super_block *sb)
|
|
{
|
|
struct jfs_log *log = JFS_SBI(sb)->log;
|
|
|
|
clear_bit(log_QUIESCE, &log->flag);
|
|
TXN_WAKEUP(&log->syncwait);
|
|
}
|
|
|
|
/*
|
|
* jfs_sync(void)
|
|
*
|
|
* To be run as a kernel daemon. This is awakened when tlocks run low.
|
|
* We write any inodes that have anonymous tlocks so they will become
|
|
* available.
|
|
*/
|
|
int jfs_sync(void *arg)
|
|
{
|
|
struct inode *ip;
|
|
struct jfs_inode_info *jfs_ip;
|
|
tid_t tid;
|
|
|
|
do {
|
|
/*
|
|
* write each inode on the anonymous inode list
|
|
*/
|
|
TXN_LOCK();
|
|
while (jfs_tlocks_low && !list_empty(&TxAnchor.anon_list)) {
|
|
jfs_ip = list_entry(TxAnchor.anon_list.next,
|
|
struct jfs_inode_info,
|
|
anon_inode_list);
|
|
ip = &jfs_ip->vfs_inode;
|
|
|
|
if (! igrab(ip)) {
|
|
/*
|
|
* Inode is being freed
|
|
*/
|
|
list_del_init(&jfs_ip->anon_inode_list);
|
|
} else if (mutex_trylock(&jfs_ip->commit_mutex)) {
|
|
/*
|
|
* inode will be removed from anonymous list
|
|
* when it is committed
|
|
*/
|
|
TXN_UNLOCK();
|
|
tid = txBegin(ip->i_sb, COMMIT_INODE);
|
|
txCommit(tid, 1, &ip, 0);
|
|
txEnd(tid);
|
|
mutex_unlock(&jfs_ip->commit_mutex);
|
|
|
|
iput(ip);
|
|
/*
|
|
* Just to be safe. I don't know how
|
|
* long we can run without blocking
|
|
*/
|
|
cond_resched();
|
|
TXN_LOCK();
|
|
} else {
|
|
/* We can't get the commit mutex. It may
|
|
* be held by a thread waiting for tlock's
|
|
* so let's not block here. Save it to
|
|
* put back on the anon_list.
|
|
*/
|
|
|
|
/* Move from anon_list to anon_list2 */
|
|
list_move(&jfs_ip->anon_inode_list,
|
|
&TxAnchor.anon_list2);
|
|
|
|
TXN_UNLOCK();
|
|
iput(ip);
|
|
TXN_LOCK();
|
|
}
|
|
}
|
|
/* Add anon_list2 back to anon_list */
|
|
list_splice_init(&TxAnchor.anon_list2, &TxAnchor.anon_list);
|
|
|
|
if (freezing(current)) {
|
|
TXN_UNLOCK();
|
|
try_to_freeze();
|
|
} else {
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
TXN_UNLOCK();
|
|
schedule();
|
|
}
|
|
} while (!kthread_should_stop());
|
|
|
|
jfs_info("jfs_sync being killed");
|
|
return 0;
|
|
}
|
|
|
|
#if defined(CONFIG_PROC_FS) && defined(CONFIG_JFS_DEBUG)
|
|
int jfs_txanchor_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
char *freewait;
|
|
char *freelockwait;
|
|
char *lowlockwait;
|
|
|
|
freewait =
|
|
waitqueue_active(&TxAnchor.freewait) ? "active" : "empty";
|
|
freelockwait =
|
|
waitqueue_active(&TxAnchor.freelockwait) ? "active" : "empty";
|
|
lowlockwait =
|
|
waitqueue_active(&TxAnchor.lowlockwait) ? "active" : "empty";
|
|
|
|
seq_printf(m,
|
|
"JFS TxAnchor\n"
|
|
"============\n"
|
|
"freetid = %d\n"
|
|
"freewait = %s\n"
|
|
"freelock = %d\n"
|
|
"freelockwait = %s\n"
|
|
"lowlockwait = %s\n"
|
|
"tlocksInUse = %d\n"
|
|
"jfs_tlocks_low = %d\n"
|
|
"unlock_queue is %sempty\n",
|
|
TxAnchor.freetid,
|
|
freewait,
|
|
TxAnchor.freelock,
|
|
freelockwait,
|
|
lowlockwait,
|
|
TxAnchor.tlocksInUse,
|
|
jfs_tlocks_low,
|
|
list_empty(&TxAnchor.unlock_queue) ? "" : "not ");
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#if defined(CONFIG_PROC_FS) && defined(CONFIG_JFS_STATISTICS)
|
|
int jfs_txstats_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
seq_printf(m,
|
|
"JFS TxStats\n"
|
|
"===========\n"
|
|
"calls to txBegin = %d\n"
|
|
"txBegin blocked by sync barrier = %d\n"
|
|
"txBegin blocked by tlocks low = %d\n"
|
|
"txBegin blocked by no free tid = %d\n"
|
|
"calls to txBeginAnon = %d\n"
|
|
"txBeginAnon blocked by sync barrier = %d\n"
|
|
"txBeginAnon blocked by tlocks low = %d\n"
|
|
"calls to txLockAlloc = %d\n"
|
|
"tLockAlloc blocked by no free lock = %d\n",
|
|
TxStat.txBegin,
|
|
TxStat.txBegin_barrier,
|
|
TxStat.txBegin_lockslow,
|
|
TxStat.txBegin_freetid,
|
|
TxStat.txBeginAnon,
|
|
TxStat.txBeginAnon_barrier,
|
|
TxStat.txBeginAnon_lockslow,
|
|
TxStat.txLockAlloc,
|
|
TxStat.txLockAlloc_freelock);
|
|
return 0;
|
|
}
|
|
#endif
|