Re: RSS/Flow Rule Configuration Issue on Intel X710 (i40e Driver)

[Lukáš Šišmiš]

Hi SidAli,




https://gist.github.com/lukashino/8fe387caabe2750d396bc97f2d66066a





Cheers,

Lukas

On 3/25/25 17:42, Sid ali cherrati wrote:

if that is the only rule you are creating then I don't think it is enough. Please have a look at this snippet I made few years back. There you first initialize the number of queues and then in the follow-up rules the patterns you want to apply RSS to.

Dear DPDK Team,



*Objective* :


*Error : *
Validation failed: RSS Queues not supported when pattern specified .

*Hardware/Software*:

 *

    NIC: Intel X710

  * Driver: |i40e|
 *

    DPDK Version: 23.11

*Code Snippet:*
intflow_filtering(uint16_tport_id, uint32_tip_addr, uint16_tudp_port) {
structrte_flow_errorerror;
structrte_flow_attrattr={ .ingress=1, .priority=0};
structrte_flow_itempattern[4];
structrte_flow_actionaction[2];
structrte_flow*flow;
// Ethernet
memset(pattern, 0, sizeof(pattern));
pattern[0].type=RTE_FLOW_ITEM_TYPE_ETH;
// IPv4
structrte_flow_item_ipv4ipv4_spec={ .hdr.dst_addr=RTE_BE32(ip_addr) };
structrte_flow_item_ipv4ipv4_mask={ .hdr.dst_addr=RTE_BE32(0xFFFFFFFF) };
pattern[1].type=RTE_FLOW_ITEM_TYPE_IPV4;
pattern[1].spec=&ipv4_spec;
pattern[1].mask=&ipv4_mask;
// UDP
structrte_flow_item_udpudp_spec={ .hdr.dst_port=RTE_BE16(udp_port) };
structrte_flow_item_udpudp_mask={ .hdr.dst_port=RTE_BE16(0xFFFF) };
pattern[2].type=RTE_FLOW_ITEM_TYPE_UDP;
pattern[2].spec=&udp_spec;
pattern[2].mask=&udp_mask;
pattern[3].type=RTE_FLOW_ITEM_TYPE_END;
// action
action[0].type=RTE_FLOW_ACTION_TYPE_RSS;
// struct rte_flow_action_queue queue_action = { .index = RX_ID };
// action[0].conf = &queue_action;
// Configuration RSS
uint16_tqueues[]={1, 2, 3};
structrte_flow_action_rssrss_conf={
.func=RTE_ETH_HASH_FUNCTION_DEFAULT,
.types=
RTE_ETH_RSS_IPV4|
RTE_ETH_RSS_UDP,
.key_len=0,
.queue_num=3,
.queue=queues,
};
action[0].type=RTE_FLOW_ACTION_TYPE_RSS;
action[0].conf=&rss_conf;
action[1].type=RTE_FLOW_ACTION_TYPE_END;
if(rte_flow_validate(port_id, &attr, pattern, action, &error) !=0) {
printf("Validation Failure: %s\n", error.message);
return-1;
}
// Flow rule creation
flow=rte_flow_create(port_id, &attr, pattern, action, &error);
if(flow==NULL) {
printf("Error creating flow rule : %s\n", error.message);
return-1;
}
printf("Flow rule created for IP %u.%u.%u.%uand UDP port %u\n",
(ip_addr>>24) &0xFF, (ip_addr>>16) &0xFF,
(ip_addr>>8) &0xFF, ip_addr&0xFF, udp_port);
return0;
}



Thank you in advance for your time and support.

Best regards,

SidAli

I hope this message finds you well. I am reaching out to seek your expertise regarding an issue I am encountering while configuring *DPDK flow rules with RSS* on an *Intel X710 NIC* (using the |i40e| driver). Despite multiple attempts, I have been unable to resolve the error and would greatly appreciate your guidance. Redirect UDP traffic (specific destination IP/port) to *multiple RX queues* using |rte_flow| with RSS. I would be grateful for any insights, code examples, or documentation references to resolve this issue. Please let me know if additional details are required.

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