>>> On 22.10.15 at 12:45, <paul.durr...@citrix.com> wrote:
>>  -----Original Message-----
>> From: Jan Beulich [mailto:jbeul...@suse.com]
>> Sent: 22 October 2015 09:51
>> To: Paul Durrant
>> Cc: Ian Campbell; Ian Jackson; xen-de...@lists.xenproject.org; Keir
>> (Xen.org); Tim (Xen.org)
>> Subject: Re: [PATCH v5 4/5] public/io/netif.h: add extra info slots for 
> passing
>> hash values
>> 
>> >>> On 20.10.15 at 14:35, <paul.durr...@citrix.com> wrote:
>> > @@ -390,6 +396,18 @@
>> >   * type: Must be XEN_NETIF_EXTRA_TYPE_MCAST_{ADD,DEL}
>> >   * flags: XEN_NETIF_EXTRA_FLAG_*
>> >   * addr: address to add/remove
>> > + *
>> > + * XEN_NETIF_EXTRA_TYPE_HASH:
>> > + *
>> > + *    0     1     2     3     4     5     6     7  octet
>> > + * +-----+-----+-----+-----+-----+-----+-----+-----+
>> > + * |type |flags|htype| pad |LSB ---- value ---- MSB|
>> > + * +-----+-----+-----+-----+-----+-----+-----+-----+
>> > + *
>> > + * type: Must be XEN_NETIF_EXTRA_TYPE_HASH
>> > + * flags: XEN_NETIF_EXTRA_FLAG_*
>> > + * htype: XEN_NETIF_HASH_TYPE_*
>> > + * value: Hash value
>> >   */
>> 
>> For future extensibility, require the pad field to be zero?
> 
> Absolutely. That was my intention but you're right that it needs to be 
> stated.

And (without having looked at the patches) also enforced.

Jan


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