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| author | Dave Kleikamp <shaggy@austin.ibm.com> | 2005-10-11 16:06:59 +0200 |
|---|---|---|
| committer | Dave Kleikamp <shaggy@austin.ibm.com> | 2005-10-11 16:06:59 +0200 |
| commit | b6a47fd8ff08a9d5cd279cdb8d97a619983575fa (patch) | |
| tree | 5e946b5a7c3f224d181525ca475fd3f29508c47d | |
| parent | JFS: make special inodes play nicely with page balancing (diff) | |
| download | linux-b6a47fd8ff08a9d5cd279cdb8d97a619983575fa.tar.xz linux-b6a47fd8ff08a9d5cd279cdb8d97a619983575fa.zip | |
JFS: Corrupted block map should not cause trap
Replace assert statements with better error handling.
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
| -rw-r--r-- | fs/jfs/jfs_dmap.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c index 51c02bf07878..68000a50ceb6 100644 --- a/fs/jfs/jfs_dmap.c +++ b/fs/jfs/jfs_dmap.c @@ -74,7 +74,7 @@ static void dbAllocBits(struct bmap * bmp, struct dmap * dp, s64 blkno, int nblocks); static void dbSplit(dmtree_t * tp, int leafno, int splitsz, int newval); -static void dbBackSplit(dmtree_t * tp, int leafno); +static int dbBackSplit(dmtree_t * tp, int leafno); static int dbJoin(dmtree_t * tp, int leafno, int newval); static void dbAdjTree(dmtree_t * tp, int leafno, int newval); static int dbAdjCtl(struct bmap * bmp, s64 blkno, int newval, int alloc, @@ -2466,7 +2466,9 @@ dbAdjCtl(struct bmap * bmp, s64 blkno, int newval, int alloc, int level) * that it is at the front of a binary buddy system. */ if (oldval == NOFREE) { - dbBackSplit((dmtree_t *) dcp, leafno); + rc = dbBackSplit((dmtree_t *) dcp, leafno); + if (rc) + return rc; oldval = dcp->stree[ti]; } dbSplit((dmtree_t *) dcp, leafno, dcp->budmin, newval); @@ -2626,7 +2628,7 @@ static void dbSplit(dmtree_t * tp, int leafno, int splitsz, int newval) * * serialization: IREAD_LOCK(ipbmap) or IWRITE_LOCK(ipbmap) held on entry/exit; */ -static void dbBackSplit(dmtree_t * tp, int leafno) +static int dbBackSplit(dmtree_t * tp, int leafno) { int budsz, bud, w, bsz, size; int cursz; @@ -2661,7 +2663,10 @@ static void dbBackSplit(dmtree_t * tp, int leafno) */ for (w = leafno, bsz = budsz;; bsz <<= 1, w = (w < bud) ? w : bud) { - assert(bsz < le32_to_cpu(tp->dmt_nleafs)); + if (bsz >= le32_to_cpu(tp->dmt_nleafs)) { + jfs_err("JFS: block map error in dbBackSplit"); + return -EIO; + } /* determine the buddy. */ @@ -2680,7 +2685,11 @@ static void dbBackSplit(dmtree_t * tp, int leafno) } } - assert(leaf[leafno] == size); + if (leaf[leafno] != size) { + jfs_err("JFS: wrong leaf value in dbBackSplit"); + return -EIO; + } + return 0; } |