From mboxrd@z Thu Jan 1 00:00:00 1970 From: jiangyiwen Date: Mon, 5 Oct 2015 11:50:24 +0800 Subject: [Ocfs2-devel] [PATCH] ocfs2: Solve a problem of crossing the boundary in updating backups Message-ID: <5611F380.2050102@huawei.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ocfs2-devel@oss.oracle.com In update_backups func, it exists a problem of crossing the boundary as follows: we assume that lun will be resized to 1TB(cluster_size is 32kb), it will include 0~33554431 cluster, in update_backups func, it will backup super block in location of 1TB which is the 33554432th cluster, so the phenomenon of crossing the boundary is happened. Signed-off-by: Yiwen Jiang --- fs/ocfs2/resize.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ocfs2/resize.c b/fs/ocfs2/resize.c index d5da6f6..10ad87b 100644 --- a/fs/ocfs2/resize.c +++ b/fs/ocfs2/resize.c @@ -187,7 +187,7 @@ static int update_backups(struct inode * inode, u32 clusters, char *data) for (i = 0; i < OCFS2_MAX_BACKUP_SUPERBLOCKS; i++) { blkno = ocfs2_backup_super_blkno(inode->i_sb, i); cluster = ocfs2_blocks_to_clusters(inode->i_sb, blkno); - if (cluster > clusters) + if (cluster >= clusters) break; ret = ocfs2_read_blocks_sync(osb, blkno, 1, &backup); -- 1.8.4.3