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authorDave Kleikamp <shaggy@austin.ibm.com>2005-09-20 14:58:11 -0500
committerDave Kleikamp <shaggy@austin.ibm.com>2005-09-20 14:58:11 -0500
commit438282d85de2c8f8c5183fdf55140e51a0b18670 (patch)
treeee90f834ebbf60d45b11d48c4a3fac82a1b62752 /fs
parent6cb1269b9607649b5edf1c4e7818e0cf34a9db71 (diff)
downloadop-kernel-dev-438282d85de2c8f8c5183fdf55140e51a0b18670.zip
op-kernel-dev-438282d85de2c8f8c5183fdf55140e51a0b18670.tar.gz
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>
Diffstat (limited to 'fs')
-rw-r--r--fs/jfs/jfs_txnmgr.c9
-rw-r--r--fs/jfs/jfs_txnmgr.h1
2 files changed, 9 insertions, 1 deletions
diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c
index 8132fce..9b71ed2 100644
--- a/fs/jfs/jfs_txnmgr.c
+++ b/fs/jfs/jfs_txnmgr.c
@@ -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
diff --git a/fs/jfs/jfs_txnmgr.h b/fs/jfs/jfs_txnmgr.h
index 59ad0f6..0e4dc45 100644
--- a/fs/jfs/jfs_txnmgr.h
+++ b/fs/jfs/jfs_txnmgr.h
@@ -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
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