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JFS: don't dereference tlck->ip from txUpdateMap 

The inode pointer may no longer be valid

Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
This commit is contained in:
Dave Kleikamp 2005-09-20 14:58:11 -05:00
parent 6cb1269b96
commit 438282d85d
2 changed files with 9 additions and 1 deletions
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9
fs/jfs/jfs_txnmgr.c
View File

@ -725,6 +725,9 @@ struct tlock *txLock(tid_t tid, struct inode *ip, struct metapage * mp,
else
tlck->flag = tlckINODELOCK;
if (S_ISDIR(ip->i_mode))
tlck->flag |= tlckDIRECTORY;
tlck->type = 0;
/* bind the tlock and the page */
@ -1009,6 +1012,8 @@ struct tlock *txMaplock(tid_t tid, struct inode *ip, int type)
/* bind the tlock and the object */
tlck->flag = tlckINODELOCK;
if (S_ISDIR(ip->i_mode))
tlck->flag |= tlckDIRECTORY;
tlck->ip = ip;
tlck->mp = NULL;
@ -1077,6 +1082,8 @@ struct linelock *txLinelock(struct linelock * tlock)
linelock->flag = tlckLINELOCK;
linelock->maxcnt = TLOCKLONG;
linelock->index = 0;
if (tlck->flag & tlckDIRECTORY)
linelock->flag |= tlckDIRECTORY;
/* append linelock after tlock */
linelock->next = tlock->next;
@ -2358,7 +2365,7 @@ static void txUpdateMap(struct tblock * tblk)
*/
else { /* (maplock->flag & mlckFREE) */
if (S_ISDIR(tlck->ip->i_mode))
if (tlck->flag & tlckDIRECTORY)
txFreeMap(ipimap, maplock,
tblk, COMMIT_PWMAP);
else

1
fs/jfs/jfs_txnmgr.h
View File

@ -122,6 +122,7 @@ extern struct tlock *TxLock; /* transaction lock table */
#define tlckLOG 0x0800
/* updateMap state */
#define tlckUPDATEMAP 0x0080
#define tlckDIRECTORY 0x0040
/* freeLock state */
#define tlckFREELOCK 0x0008
#define tlckWRITEPAGE 0x0004