diff options
| author | Mark Fasheh <mfasheh@suse.com> | 2009-02-19 13:17:05 -0800 |
|---|---|---|
| committer | Mark Fasheh <mfasheh@suse.com> | 2009-04-03 11:39:17 -0700 |
| commit | 1d46dc08d33138c29c63d717807c08ab704fc773 (patch) | |
| tree | 8e4d2e1b5c49cb379c0f800e00e1cd01d33d4d0c /fs/ocfs2 | |
| parent | b80b549c3520b31d3bbc4b36e37e0a5102da0b94 (diff) | |
ocfs2: fix leaf start calculation in ocfs2_dx_dir_rebalance()
ocfs2_dx_dir_rebalance() is passed the block offset of a dx leaf which needs
rebalancing. Since we rebalance an entire cluster at a time however, this
function needs to calculate the beginning of that cluster, in blocks. The
calculation was wrong, which would result in a read of non-leaf blocks. Fix
the calculation by adding ocfs2_block_to_cluster_start() which is a more
straight-forward way of determining this.
Reported-by: Tristan Ye <tristan.ye@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'fs/ocfs2')
| -rw-r--r-- | fs/ocfs2/dir.c | 3 | ||||
| -rw-r--r-- | fs/ocfs2/ocfs2.h | 10 |
2 files changed, 11 insertions, 2 deletions
diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c index 5e6aeb00cb4..e71160cda11 100644 --- a/fs/ocfs2/dir.c +++ b/fs/ocfs2/dir.c @@ -3941,8 +3941,7 @@ static int ocfs2_dx_dir_rebalance(struct ocfs2_super *osb, struct inode *dir, goto out_commit; } - orig_leaves_start = leaf_blkno & ~(osb->s_clustersize_bits - - osb->sb->s_blocksize_bits); + orig_leaves_start = ocfs2_block_to_cluster_start(dir->i_sb, leaf_blkno); ret = ocfs2_read_dx_leaves(dir, orig_leaves_start, num_dx_leaves, orig_dx_leaves); if (ret) { diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h index fa3c6d3f0bd..e1844d5736c 100644 --- a/fs/ocfs2/ocfs2.h +++ b/fs/ocfs2/ocfs2.h @@ -582,6 +582,16 @@ static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; } +static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, + u64 blocks) +{ + int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; + unsigned int clusters; + + clusters = ocfs2_blocks_to_clusters(sb, blocks); + return (u64)clusters << bits; +} + static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, u64 bytes) { |