[LTP] [PATCH] syscalls/ioctl_loop05.c: skip test on overlay filesystem

[Yang Xu <xuyang2018.jy@cn.fujitsu.com>]

Hi Radoslav
> Hi!
>> diff --git a/lib/tst_device.c b/lib/tst_device.c
>> index c096b418b..de64fd908 100644
>> --- a/lib/tst_device.c
>> +++ b/lib/tst_device.c
>> @@ -534,6 +534,10 @@ void tst_find_backing_dev(const char *path, char *dev)
>>           if (stat(dev,&buf)<  0)
>>                   tst_brkm(TWARN | TERRNO, NULL, "stat(%s) failed", dev);
>>
>> -       if (S_ISBLK(buf.st_mode) != 1)
>> -               tst_brkm(TCONF, NULL, "dev(%s) isn't a block dev", dev);
>> +       if (S_ISBLK(buf.st_mode) != 1) {
>> +               if (tst_is_mounted(dev))
>> +                       tst_find_backing_dev(dev, dev);
>> +               else
>> +                       tst_brkm(TCONF, NULL, "dev(%s) isn't a block
>> dev", dev);
>> +       }
>>    }
>>
>> My test environment is that
>> /dev/sda10              20G  623M   18G   4% /mnt/xfstests/test
>> /mnt/xfstests/test      20G  623M   18G   4% /mnt/xfstests/test/ovl-mnt
>> /dev/sda11              20G   46M   19G   1% /mnt/xfstests/scratch
>> /mnt/xfstests/scratch   20G   46M   19G   1% /mnt/xfstests/scratch/ovl-mnt
>>
>> and my TMPDIR env is /mnt/xfstests/test/ovl-mnt.
>
> Does this code works for everyone or should we apply patch that disables
> the test on overlay so that it's fixed for next release?
Thanks for this patch, merged.

Best Regards
Yang Xu
>