[Ocfs2-devel] ocfs2: should not use le32_add_cpu to set ocfs2_dinode i_flags

Joseph Qi joseph.qi at huawei.com
Wed Jan 21 17:07:48 PST 2015


Hi Srini,

On 2015/1/22 1:55, Srinivas Eeda wrote:
> Hi Joesph,
> 
> thanks a lot for submitting the above patch. I am trying to understand what kind of flag corruption have you noticed and under what circumstances ? I agree with the patch that bitwise operations are better than adding, but I am not able to understand the corruption it could cause. Can you please share!
> 
Suppose a the following case:
The dinode i_flag already has the OCFS2_ORPHANED_FL bit set, and calling
le32_add_cpu again. Then it will corrupt the i_flag.

--
Joseph

> Thanks,
> --Srini
> 
> 
> 





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