Re: [PATCH] xfs/278: mkfs with v4 format

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On 3/22/18 3:26 PM, Darrick J. Wong wrote:
> 
>>> parsing error
>>> field u not found
>>> parsing error
>>
>> ...
>>
>> Switch back to the original behavior by turning off crcs,
>> and catch such failures if they crop up again by looking
>> for xfs_db errors in $seqres.full.
>>
>> Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
>> ---
>>
>> (is it horrific to grep $seqres.full?  xfs_db doesn't exit
>> with failure in this case :( )
>>
>> and now this causes repair to fail on a verifier error, but
>> I just sent an xfsprogs patch to fix that as well.
>>
>> diff --git a/tests/xfs/278 b/tests/xfs/278
>> index b94ee9c..c0e09c7 100755
>> --- a/tests/xfs/278
>> +++ b/tests/xfs/278
>> @@ -48,7 +48,7 @@ _supported_os Linux
>>  _require_scratch
>>  
>>  rm -f $seqres.full
>> -_scratch_mkfs >$seqres.full 2>&1
>> +_scratch_mkfs -m crc=0 -n ftype=0 >$seqres.full 2>&1
> 
> This is still a problem on v5 filesystems, isn't it?

... but the above makes it V4, right?

> 
>>  _scratch_mount
>>  
>>  mkdir -p $SCRATCH_MNT/dir/subdir
>> @@ -73,6 +73,8 @@ _scratch_xfs_db -x -c "inode $DIR_INO" -c "write core.nlinkv2 0"  >> $seqres.ful
>>  _scratch_xfs_db -x -c "inode $SUBDIR_INO" -c "write u.sfdir2.hdr.parent.i4 0"  >> $seqres.full
> 
> So I think the problem here is that between v4 and v5 the field names
> changed slightly?
> 
> u.sfdir2.hdr.parent.i4 vs. u3.sfdir3.hdr.parent.i4?
> 
> So we ought to be able to _scratch_xfs_get_metadata_field to see if the
> v4 field name exists, then _scratch_xfs_set_metadata_field with the
> appropriate name to set the field?
> 
> ino_loc="inode $SUBDIR_INO"
> if [ -n "$(_scratch_xfs_get_metadata_field "u.sfdir2.hdr.parent.i4" "$ino_loc" ]; then
> 	_scratch_xfs_set_metadata_field "u.sfdir2.hdr.parent.i4" 0 "$ino_loc"
> else
> 	_scratch_xfs_set_metadata_field "u3.sfdir3.hdr.parent.i4" 0 "$ino_loc"
> fi
> 
> Or something like that.
> 

yeah, could do, is it worth it?  Trying to exercise repair's lost+found behavior,
I'm not sure how valuable it is to add a bunch of code to handle every possible
format to get to the same endpoint...

My original plan was to just constrain the test to a known quantity to test
the target functionality that way ...

-Eric
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