On Jan 4, 2017, at 2:54 PM, Darrick J. Wong <darrick.wong@xxxxxxxxxx> wrote:
>
> On Wed, Jan 04, 2017 at 04:29:33PM +0800, zhangyi (F) wrote:
>> On 2017/1/1 6:59, Valdis.Kletnieks@xxxxxx said:
>>> On Mon, 26 Dec 2016 20:34:17 +0800, yi zhang said:
>>>> Because of the disk and hardware issue, the ext4 filesystem have
>>>> many errors, the inode->i_nlink of ext4 becomes zero abnormally
>>>> but the dentry is still positive, it will cause memory corruption
>>>> after the following process:
>>>>
>>>> 1) Due to the inode->i_nlink is 0, this inode will be added into
>>>> the orhpan list,
>>>
>>>> + if (WARN(inode->i_nlink == 0, "inode %lu nlink"
>>>> + " is already 0", inode->i_ino))
>>>
>>> Can we get the filesystem? Or at least the device major/minor? If a system
>>> has multiple large ext4 filesystems, it would be helpful to know which
>>> one is having the problem.
>>>
>>
>> if (WARN(inode->i_nlink == 0,
>> - "inode %lu nlink is already 0", inode->i_ino))
>> + "inode %lu nlink is already 0, dev=%u:%u",
>> + inode->i_ino, MAJOR(inode->i_sb->s_dev), MINOR(inode->i_sb->s_dev)))
>> return;
>>
>> We can modify as above, it's enough to know which filesystem is having the
>> problem, what do you think?
>
> Why not:
>
> if (inode->i_nlink == 0) {
> ext4_warning_inode(inode, "nlink is already 0");
> return;
> }
I like this better as well.
Cheers, Andreas
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