[dm-devel] [PATCH v2 1/2] md raid0/linear: Introduce new array state 'broken'

[Guilherme G. Piccoli]

On 19/08/2019 15:57, Song Liu wrote:
>[...] 
> 
> I was thinking, if we can set MD_BROKEN when the device fails, we can 
> just test MD_BROKEN in array_state_show() (instead of iterating through 
> all devices). 
> 
> Would this work?
> 
> Thanks,
> Song
> 

This could work, but will require some refactors; it'll simplify the
check for a healthy array (no need for is_missing_dev() function) but
will complicate the criteria to clear MD_BROKEN and the detection of
more members failing (we would stop the detection after the 1st failure
if we only test MD_BROKEN).

We will always need to test the GENHD_FL_UP in some code path, to be
able to show users device recovered from a failure.
Where do you suggest to test this flag?

Thanks,


Guilherme