summaryrefslogtreecommitdiff
path: root/fs/ocfs2/ocfs2.h
diff options
context:
space:
mode:
authorMark Fasheh <mfasheh@suse.com>2009-02-19 13:17:05 -0800
committerMark Fasheh <mfasheh@suse.com>2009-04-03 11:39:17 -0700
commit1d46dc08d33138c29c63d717807c08ab704fc773 (patch)
tree8e4d2e1b5c49cb379c0f800e00e1cd01d33d4d0c /fs/ocfs2/ocfs2.h
parentb80b549c3520b31d3bbc4b36e37e0a5102da0b94 (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/ocfs2.h')
-rw-r--r--fs/ocfs2/ocfs2.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index fa3c6d3f0bd2..e1844d5736c4 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)
{