On 8/1/2017 3:22 AM, Jamal Hadi Salim wrote:
> On 17-07-31 08:37 PM, Amritha Nambiar wrote:
>> The Mirred/redirect action is extended to forward to a traffic
>> class on the device. The traffic class index needs to be
>> provided in addition to the device's ifindex.
>>
>> Example:
>> # tc filter add dev eth0 protocol ip parent ffff: prio 1 flower\
>> dst_ip 192.168.1.1/32 ip_proto udp dst_port 22\
>> skip_sw indev eth0 action mirred ingress redirect dev eth0 tc 1
>>
>> Signed-off-by: Amritha Nambiar <amritha.namb...@intel.com>
>> ---
>> include/net/tc_act/tc_mirred.h | 7 +++++++
>> include/uapi/linux/tc_act/tc_mirred.h | 5 +++++
>> net/sched/act_mirred.c | 17 +++++++++++++++++
>> 3 files changed, 29 insertions(+)
>>
>> diff --git a/include/net/tc_act/tc_mirred.h b/include/net/tc_act/tc_mirred.h
>> index 604bc31..60058c4 100644
>> --- a/include/net/tc_act/tc_mirred.h
>> +++ b/include/net/tc_act/tc_mirred.h
>> @@ -9,6 +9,8 @@ struct tcf_mirred {
>> int tcfm_eaction;
>> int tcfm_ifindex;
>> bool tcfm_mac_header_xmit;
>> + u8 tcfm_tc;
>> + u32 flags;
>> struct net_device __rcu *tcfm_dev;
>> struct list_head tcfm_list;
>> };
>> @@ -37,4 +39,9 @@ static inline int tcf_mirred_ifindex(const struct
>> tc_action *a)
>> return to_mirred(a)->tcfm_ifindex;
>> }
>>
>> +static inline int tcf_mirred_tc(const struct tc_action *a)
>> +{
>> + return to_mirred(a)->tcfm_tc;
>> +}
>> +
>> #endif /* __NET_TC_MIR_H */
>> diff --git a/include/uapi/linux/tc_act/tc_mirred.h
>> b/include/uapi/linux/tc_act/tc_mirred.h
>> index 3d7a2b3..8ff4d76 100644
>> --- a/include/uapi/linux/tc_act/tc_mirred.h
>> +++ b/include/uapi/linux/tc_act/tc_mirred.h
>> @@ -9,6 +9,10 @@
>> #define TCA_EGRESS_MIRROR 2 /* mirror packet to EGRESS */
>> #define TCA_INGRESS_REDIR 3 /* packet redirect to INGRESS*/
>> #define TCA_INGRESS_MIRROR 4 /* mirror packet to INGRESS */
>> +
>> +#define MIRRED_F_TC_MAP 0x1
>> +#define MIRRED_TC_MAP_MAX 0x10
>
> Assuming this is the max number of queues?
> Where does this upper bound come from? Is it a spec
> or an intel thing? If spec - mentioning which
> spec and section would be useful.
This is the max number of TCs. The Linux upper bound for this is defined
in linux/netdevice.h. I will fix this part to remove the definition here
and reuse the existing one.
>
> cheers,
> jamal
>
