diff options
| -rw-r--r-- | fs/jfs/jfs_dmap.c | 46 |
1 files changed, 30 insertions, 16 deletions
diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c index 0732f206ca60..c739626f5bf1 100644 --- a/fs/jfs/jfs_dmap.c +++ b/fs/jfs/jfs_dmap.c @@ -75,7 +75,7 @@ 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 void dbJoin(dmtree_t * tp, int leafno, int newval); +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, int level); @@ -98,8 +98,8 @@ static int dbExtend(struct inode *ip, s64 blkno, s64 nblocks, s64 addnblocks); static int dbFindBits(u32 word, int l2nb); static int dbFindCtl(struct bmap * bmp, int l2nb, int level, s64 * blkno); static int dbFindLeaf(dmtree_t * tp, int l2nb, int *leafidx); -static void dbFreeBits(struct bmap * bmp, struct dmap * dp, s64 blkno, - int nblocks); +static int dbFreeBits(struct bmap * bmp, struct dmap * dp, s64 blkno, + int nblocks); static int dbFreeDmap(struct bmap * bmp, struct dmap * dp, s64 blkno, int nblocks); static int dbMaxBud(u8 * cp); @@ -378,6 +378,7 @@ int dbFree(struct inode *ip, s64 blkno, s64 nblocks) /* free the blocks. */ if ((rc = dbFreeDmap(bmp, dp, blkno, nb))) { + jfs_error(ip->i_sb, "dbFree: error in block map\n"); release_metapage(mp); IREAD_UNLOCK(ipbmap); return (rc); @@ -2020,7 +2021,7 @@ static int dbFreeDmap(struct bmap * bmp, struct dmap * dp, s64 blkno, int nblocks) { s8 oldroot; - int rc, word; + int rc = 0, word; /* save the current value of the root (i.e. maximum free string) * of the dmap tree. @@ -2028,11 +2029,11 @@ static int dbFreeDmap(struct bmap * bmp, struct dmap * dp, s64 blkno, oldroot = dp->tree.stree[ROOT]; /* free the specified (blocks) bits */ - dbFreeBits(bmp, dp, blkno, nblocks); + rc = dbFreeBits(bmp, dp, blkno, nblocks); - /* if the root has not changed, done. */ - if (dp->tree.stree[ROOT] == oldroot) - return (0); + /* if error or the root has not changed, done. */ + if (rc || (dp->tree.stree[ROOT] == oldroot)) + return (rc); /* root changed. bubble the change up to the dmap control pages. * if the adjustment of the upper level control pages fails, @@ -2221,15 +2222,16 @@ static void dbAllocBits(struct bmap * bmp, struct dmap * dp, s64 blkno, * blkno - starting block number of the bits to be freed. * nblocks - number of bits to be freed. * - * RETURN VALUES: none + * RETURN VALUES: 0 for success * * serialization: IREAD_LOCK(ipbmap) or IWRITE_LOCK(ipbmap) held on entry/exit; */ -static void dbFreeBits(struct bmap * bmp, struct dmap * dp, s64 blkno, +static int dbFreeBits(struct bmap * bmp, struct dmap * dp, s64 blkno, int nblocks) { int dbitno, word, rembits, nb, nwords, wbitno, nw, agno; dmtree_t *tp = (dmtree_t *) & dp->tree; + int rc = 0; int size; /* determine the bit number and word within the dmap of the @@ -2278,8 +2280,10 @@ static void dbFreeBits(struct bmap * bmp, struct dmap * dp, s64 blkno, /* update the leaf for this dmap word. */ - dbJoin(tp, word, - dbMaxBud((u8 *) & dp->wmap[word])); + rc = dbJoin(tp, word, + dbMaxBud((u8 *) & dp->wmap[word])); + if (rc) + return rc; word += 1; } else { @@ -2310,7 +2314,9 @@ static void dbFreeBits(struct bmap * bmp, struct dmap * dp, s64 blkno, /* update the leaf. */ - dbJoin(tp, word, size); + rc = dbJoin(tp, word, size); + if (rc) + return rc; /* get the number of dmap words handled. */ @@ -2357,6 +2363,8 @@ static void dbFreeBits(struct bmap * bmp, struct dmap * dp, s64 blkno, } BMAP_UNLOCK(bmp); + + return 0; } @@ -2464,7 +2472,9 @@ dbAdjCtl(struct bmap * bmp, s64 blkno, int newval, int alloc, int level) } dbSplit((dmtree_t *) dcp, leafno, dcp->budmin, newval); } else { - dbJoin((dmtree_t *) dcp, leafno, newval); + rc = dbJoin((dmtree_t *) dcp, leafno, newval); + if (rc) + return rc; } /* check if the root of the current dmap control page changed due @@ -2689,7 +2699,7 @@ static void dbBackSplit(dmtree_t * tp, int leafno) * * RETURN VALUES: none */ -static void dbJoin(dmtree_t * tp, int leafno, int newval) +static int dbJoin(dmtree_t * tp, int leafno, int newval) { int budsz, buddy; s8 *leaf; @@ -2729,7 +2739,9 @@ static void dbJoin(dmtree_t * tp, int leafno, int newval) if (newval > leaf[buddy]) break; - assert(newval == leaf[buddy]); + /* It shouldn't be less */ + if (newval < leaf[buddy]) + return -EIO; /* check which (leafno or buddy) is the left buddy. * the left buddy gets to claim the blocks resulting @@ -2761,6 +2773,8 @@ static void dbJoin(dmtree_t * tp, int leafno, int newval) /* update the leaf value. */ dbAdjTree(tp, leafno, newval); + + return 0; } |