Re: [PATCH 1/2] block: Add new BLK_STS_SELFTEST status

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On 6.04.19 г. 6:14 ч., Qu Wenruo wrote:
> There are a lot of end_io hooks which can do some self test at
> read/write time.
> 
> Normally such selftest should return -EUCLEAN to indicate something
> unexpected.
> 
> However there is no BLK_STS_* bit for that, this makes every selftest
> error to be interpreted to EIO, which lowers the severity.
> 
> This patch will add a new BLK_STS_SELFTEST, to allow the error from
> endio to be passed to filesystem.
> 
> Signed-off-by: Qu Wenruo <wqu@xxxxxxxx>
> ---
>  block/blk-core.c          | 1 +
>  include/linux/blk_types.h | 3 +++
>  2 files changed, 4 insertions(+)
> 
> diff --git a/block/blk-core.c b/block/blk-core.c
> index 4673ebe42255..66967642a5ef 100644
> --- a/block/blk-core.c
> +++ b/block/blk-core.c
> @@ -135,6 +135,7 @@ static const struct {
>  	[BLK_STS_RESOURCE]	= { -ENOMEM,	"kernel resource" },
>  	[BLK_STS_DEV_RESOURCE]	= { -EBUSY,	"device resource" },
>  	[BLK_STS_AGAIN]		= { -EAGAIN,	"nonblocking retry" },
> +	[BLK_STS_SELFTEST]	= { -EUCLEAN,	"filesystem selftest" },

SELFTEST is ambiguous, I personally relate it to the selftests that some
subsystems have. This should be changed to STS_CLEANUP or STS_CORRUPT or
some such.

>  
>  	/* device mapper special case, should not leak out: */
>  	[BLK_STS_DM_REQUEUE]	= { -EREMCHG, "dm internal retry" },
> diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
> index 791fee35df88..5bba24c3753c 100644
> --- a/include/linux/blk_types.h
> +++ b/include/linux/blk_types.h
> @@ -63,6 +63,9 @@ typedef u8 __bitwise blk_status_t;
>   */
>  #define BLK_STS_DEV_RESOURCE	((__force blk_status_t)13)
>  
> +/* Filesystem selftest error */
> +#define BLK_STS_SELFTEST	((__force blk_status_t)14)
> +
>  /**
>   * blk_path_error - returns true if error may be path related
>   * @error: status the request was completed with
> 



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