[PATCHv2 1/2] block: map BLK_STS_ZONE_RESOURCE to errno

[Damien Le Moal]

On 2020/09/16 3:20, Keith Busch wrote:
> A zoned device with limited resources to open zones for writing may
> return an error when the host exceeds those limits. Provide an
> appropriate errno for this condition for drivers that return the zone
> resource block status error when the device responds with these
> conditions.
> 
> Signed-off-by: Keith Busch <kbusch at kernel.org>
> ---
> v1->v2:
> 
>   Pick an errno to map BLK_STS_ZONE_RESOURCE
> 
>  block/blk-core.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/block/blk-core.c b/block/blk-core.c
> index 10c08ac50697..3594efe05117 100644
> --- a/block/blk-core.c
> +++ b/block/blk-core.c
> @@ -186,6 +186,9 @@ static const struct {
>  	/* device mapper special case, should not leak out: */
>  	[BLK_STS_DM_REQUEUE]	= { -EREMCHG, "dm internal retry" },
>  
> +	/* too many zone resources in use */
> +	[BLK_STS_ZONE_RESOURCE]	= { -ETOOMANYREFS, "zone resource exceeded" },

OK. I think this is somewhat matching. The error message that strerrror()
returns for this error will be somewhat obscure to users though. We need to
document this.

> +
>  	/* everything else not covered above: */
>  	[BLK_STS_IOERR]		= { -EIO,	"I/O" },
>  };
> 


-- 
Damien Le Moal
Western Digital Research