Re: [PATCH] [xen-block] Return BLKIF_RSP_EOPNOTSUPP for unknown operation

[Mark Syms <mark.syms@xxxxxxxxx>]

> The comment in blkif.h contains:
>
>  /* Operation not supported (only happens on barrier writes). */
> #define BLKIF_RSP_EOPNOTSUPP  -2
>
> So in principle BLKIF_RSP_EOPNOTSUPP is only to be used as a response
> for BLKIF_OP_WRITE_BARRIER or BLKIF_OP_FLUSH_DISKCACHE requests,
> however blkback already uses it as a response to unknown request
> types (like you propose here).
>
> Would you mind also sending a patch to adjust blkif.h in Xen to remove
> the "(only happens on barrier writes)" part of the comment?

Sure, no problem