The patch titled
Subject: ocfs2: solve a problem of crossing the boundary in updating backups
has been added to the -mm tree. Its filename is
ocfs2-solve-a-problem-of-crossing-the-boundary-in-updating-backups.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/ocfs2-solve-a-problem-of-crossing-the-boundary-in-updating-backups.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/ocfs2-solve-a-problem-of-crossing-the-boundary-in-updating-backups.patch
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From: jiangyiwen <jiangyiwen@xxxxxxxxxx>
Subject: ocfs2: solve a problem of crossing the boundary in updating backups
In update_backups() there 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 happens.
Signed-off-by: Yiwen Jiang <jiangyiwen@xxxxxxxxxx>
Cc: Joseph Qi <joseph.qi@xxxxxxxxxx>
Cc: Xue jiufei <xuejiufei@xxxxxxxxxx>
Cc: Mark Fasheh <mfasheh@xxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ocfs2/resize.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN fs/ocfs2/resize.c~ocfs2-solve-a-problem-of-crossing-the-boundary-in-updating-backups fs/ocfs2/resize.c
--- a/fs/ocfs2/resize.c~ocfs2-solve-a-problem-of-crossing-the-boundary-in-updating-backups
+++ a/fs/ocfs2/resize.c
@@ -187,7 +187,7 @@ static int update_backups(struct inode *
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);
_
Patches currently in -mm which might be from jiangyiwen@xxxxxxxxxx are
ocfs2-fill-in-the-unused-portion-of-the-block-with-zeros-by-dio_zero_block.patch
ocfs2-avoid-occurring-deadlock-by-changing-ocfs2_wq-from-global-to-local.patch
ocfs2-solve-a-problem-of-crossing-the-boundary-in-updating-backups.patch
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