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authorYounger Liu <younger.liu@huawei.com>2013-11-12 15:07:03 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-13 12:09:01 +0900
commiteedd40e1cad4217c9b7e2577debcdd0c48732cc3 (patch)
tree7392d157fe0a7d306e3b63e457529c3846497c41 /fs/ocfs2/resize.c
parent728b98059a2f19393f906ba4febc0f2d1d15f280 (diff)
downloadlinux-eedd40e1cad4217c9b7e2577debcdd0c48732cc3.tar.bz2
ocfs2: rollback transaction in ocfs2_group_add()
If ocfs2_journal_access_di() fails, group->bg_next_group should rollback. Otherwise, there would be a inconsistency between group_bh and main_bm_bh. Signed-off-by: Younger Liu <younger.liu@huawei.com> Cc: Mark Fasheh <mfasheh@suse.com> Acked-by: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/resize.c')
-rw-r--r--fs/ocfs2/resize.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ocfs2/resize.c b/fs/ocfs2/resize.c
index ec55add7604a..376750f7883e 100644
--- a/fs/ocfs2/resize.c
+++ b/fs/ocfs2/resize.c
@@ -469,6 +469,7 @@ int ocfs2_group_add(struct inode *inode, struct ocfs2_new_group_input *input)
struct ocfs2_chain_list *cl;
struct ocfs2_chain_rec *cr;
u16 cl_bpc;
+ u64 bg_ptr;
if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
return -EROFS;
@@ -538,12 +539,14 @@ int ocfs2_group_add(struct inode *inode, struct ocfs2_new_group_input *input)
}
group = (struct ocfs2_group_desc *)group_bh->b_data;
+ bg_ptr = le64_to_cpu(group->bg_next_group);
group->bg_next_group = cr->c_blkno;
ocfs2_journal_dirty(handle, group_bh);
ret = ocfs2_journal_access_di(handle, INODE_CACHE(main_bm_inode),
main_bm_bh, OCFS2_JOURNAL_ACCESS_WRITE);
if (ret < 0) {
+ group->bg_next_group = cpu_to_le64(bg_ptr);
mlog_errno(ret);
goto out_commit;
}