[Devel] [PATCH 8/8] ploop: Show whether device supports native discard

[Kirill Tkhai]

I'll send V2 of this patch.

On 21.05.2019 13:36, Kirill Tkhai wrote:
> Shown in: /sys/block/ploopXXX/pstate/native_discard
> 
> Signed-off-by: Kirill Tkhai <ktkhai at virtuozzo.com>
> ---
>  drivers/block/ploop/sysfs.c |    6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/block/ploop/sysfs.c b/drivers/block/ploop/sysfs.c
> index b2203d152c2c..f3ef1ae7c064 100644
> --- a/drivers/block/ploop/sysfs.c
> +++ b/drivers/block/ploop/sysfs.c
> @@ -484,6 +484,11 @@ static u32 show_freeze_state(struct ploop_device * plo)
>  	return plo->freeze_state;
>  }
>  
> +static u32 show_native_discard(struct ploop_device * plo)
> +{
> +	return !test_bit(PLOOP_S_NO_FALLOC_DISCARD, &plo->state);
> +}
> +
>  #define _TUNE_U32(_name)				\
>  static u32 show_##_name(struct ploop_device * plo)	\
>  {							\
> @@ -571,6 +576,7 @@ static struct attribute *state_attributes[] = {
>  	_A(blockable_reqs),
>  	_A(blocked_bios),
>  	_A(freeze_state),
> +	_A(native_discard),
>  	NULL
>  };
>  
>