1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2017 Mellanox Technologies, Ltd
3 */
4
5 #define MAX_PATTERN_NUM 3
6 #define MAX_ACTION_NUM 2
7
8 struct rte_flow *
9 generate_ipv4_flow(uint16_t port_id, uint16_t rx_q,
10 uint32_t src_ip, uint32_t src_mask,
11 uint32_t dest_ip, uint32_t dest_mask,
12 struct rte_flow_error *error);
13
14
15 /**
16 * create a flow rule that sends packets with matching src and dest ip
17 * to selected queue.
18 *
19 * @param port_id
20 * The selected port.
21 * @param rx_q
22 * The selected target queue.
23 * @param src_ip
24 * The src ip value to match the input packet.
25 * @param src_mask
26 * The mask to apply to the src ip.
27 * @param dest_ip
28 * The dest ip value to match the input packet.
29 * @param dest_mask
30 * The mask to apply to the dest ip.
31 * @param[out] error
32 * Perform verbose error reporting if not NULL.
33 *
34 * @return
35 * A flow if the rule could be created else return NULL.
36 */
37 struct rte_flow *
generate_ipv4_flow(uint16_t port_id,uint16_t rx_q,uint32_t src_ip,uint32_t src_mask,uint32_t dest_ip,uint32_t dest_mask,struct rte_flow_error * error)38 generate_ipv4_flow(uint16_t port_id, uint16_t rx_q,
39 uint32_t src_ip, uint32_t src_mask,
40 uint32_t dest_ip, uint32_t dest_mask,
41 struct rte_flow_error *error)
42 {
43 struct rte_flow_attr attr;
44 struct rte_flow_item pattern[MAX_PATTERN_NUM];
45 struct rte_flow_action action[MAX_ACTION_NUM];
46 struct rte_flow *flow = NULL;
47 struct rte_flow_action_queue queue = { .index = rx_q };
48 struct rte_flow_item_ipv4 ip_spec;
49 struct rte_flow_item_ipv4 ip_mask;
50 int res;
51
52 memset(pattern, 0, sizeof(pattern));
53 memset(action, 0, sizeof(action));
54
55 /*
56 * set the rule attribute.
57 * in this case only ingress packets will be checked.
58 */
59 memset(&attr, 0, sizeof(struct rte_flow_attr));
60 attr.ingress = 1;
61
62 /*
63 * create the action sequence.
64 * one action only, move packet to queue
65 */
66 action[0].type = RTE_FLOW_ACTION_TYPE_QUEUE;
67 action[0].conf = &queue;
68 action[1].type = RTE_FLOW_ACTION_TYPE_END;
69
70 /*
71 * set the first level of the pattern (ETH).
72 * since in this example we just want to get the
73 * ipv4 we set this level to allow all.
74 */
75 pattern[0].type = RTE_FLOW_ITEM_TYPE_ETH;
76
77 /*
78 * setting the second level of the pattern (IP).
79 * in this example this is the level we care about
80 * so we set it according to the parameters.
81 */
82 memset(&ip_spec, 0, sizeof(struct rte_flow_item_ipv4));
83 memset(&ip_mask, 0, sizeof(struct rte_flow_item_ipv4));
84 ip_spec.hdr.dst_addr = htonl(dest_ip);
85 ip_mask.hdr.dst_addr = dest_mask;
86 ip_spec.hdr.src_addr = htonl(src_ip);
87 ip_mask.hdr.src_addr = src_mask;
88 pattern[1].type = RTE_FLOW_ITEM_TYPE_IPV4;
89 pattern[1].spec = &ip_spec;
90 pattern[1].mask = &ip_mask;
91
92 /* the final level must be always type end */
93 pattern[2].type = RTE_FLOW_ITEM_TYPE_END;
94
95 res = rte_flow_validate(port_id, &attr, pattern, action, error);
96 if (!res)
97 flow = rte_flow_create(port_id, &attr, pattern, action, error);
98
99 return flow;
100 }
101