Re: [PATCHi RFC] fstest: btrfs/158 fix miss-aligned stripe and device

[Qu Wenruo <quwenruo.btrfs@gmx.com>]

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On 2019/12/11 下午2:08, Anand Jain wrote:
> We changed the order of the allocation on the devices, and
> so the test cases which are hard coded to find specific stripe
> on the specific device gets failed. So fix it with the new layout.
> 
> Signed-off-by: Anand Jain <anand.jain@oracle.com>
> ---
> Qu, Right we need to fix the dev in the test case as well.
>     I saw your patches bit late. Here is what I had.. you may
>     use it. So I am marking this patch as RFC.

I am crafting a better solution, to handle both behavior (and even
future behavior), by getting both devid and physical offset.

And I tend to remove the fail_make_request requirement from some tests,
and direct read with multiple try should be enough to trigger repair for
test btrfs/142 and btrfs/143.


In fact, I don't believe your current fix is good enough to handle both
old and new mkfs.btrfs.

So we need to investigate more for raid repair test cases to make them
future proof.

Thanks,
Qu
> Thanks.
> 
>  tests/btrfs/158     | 10 +++++-----
>  tests/btrfs/158.out |  4 ++--
>  2 files changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/tests/btrfs/158 b/tests/btrfs/158
> index 603e8bea9b7e..7f2066384f55 100755
> --- a/tests/btrfs/158
> +++ b/tests/btrfs/158
> @@ -76,14 +76,14 @@ _scratch_unmount
>  
>  stripe_0=`get_physical_stripe0`
>  stripe_1=`get_physical_stripe1`
> -dev4=`echo $SCRATCH_DEV_POOL | awk '{print $4}'`
> -dev3=`echo $SCRATCH_DEV_POOL | awk '{print $3}'`
> +dev1=`echo $SCRATCH_DEV_POOL | awk '{print $1}'`
> +dev2=`echo $SCRATCH_DEV_POOL | awk '{print $2}'`
>  
>  # step 2: corrupt the 1st and 2nd stripe (stripe 0 and 1)
> -echo "step 2......simulate bitrot at offset $stripe_0 of device_4($dev4) and offset $stripe_1 of device_3($dev3)" >>$seqres.full
> +echo "step 2......simulate bitrot at offset $stripe_0 of device_1($dev1) and offset $stripe_1 of device_2($dev2)" >>$seqres.full
>  
> -$XFS_IO_PROG -f -d -c "pwrite -S 0xbb $stripe_0 64K" $dev4 | _filter_xfs_io
> -$XFS_IO_PROG -f -d -c "pwrite -S 0xbb $stripe_1 64K" $dev3 | _filter_xfs_io
> +$XFS_IO_PROG -f -d -c "pwrite -S 0xbb $stripe_0 64K" $dev1 | _filter_xfs_io
> +$XFS_IO_PROG -f -d -c "pwrite -S 0xbb $stripe_1 64K" $dev2 | _filter_xfs_io
>  
>  # step 3: scrub filesystem to repair the bitrot
>  echo "step 3......repair the bitrot" >> $seqres.full
> diff --git a/tests/btrfs/158.out b/tests/btrfs/158.out
> index 1f5ad3f76917..5cdaeb238c62 100644
> --- a/tests/btrfs/158.out
> +++ b/tests/btrfs/158.out
> @@ -1,9 +1,9 @@
>  QA output created by 158
>  wrote 131072/131072 bytes at offset 0
>  XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -wrote 65536/65536 bytes at offset 9437184
> +wrote 65536/65536 bytes at offset 22020096
>  XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -wrote 65536/65536 bytes at offset 9437184
> +wrote 65536/65536 bytes at offset 1048576
>  XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>  0000000 aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa
>  *
> 


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