ceph/src/spdk/dpdk/examples/flow_filtering/flow_blocks.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2017 Mellanox Technologies, Ltd
   3  */
   4
   5 #define MAX_PATTERN_NUM         4
   6
   7 struct rte_flow *
   8 generate_ipv4_flow(uint16_t port_id, uint16_t rx_q,
   9                 uint32_t src_ip, uint32_t src_mask,
  10                 uint32_t dest_ip, uint32_t dest_mask,
  11                 struct rte_flow_error *error);
  12
  13
  14 /**
  15  * create a flow rule that sends packets with matching src and dest ip
  16  * to selected queue.
  17  *
  18  * @param port_id
  19  *   The selected port.
  20  * @param rx_q
  21  *   The selected target queue.
  22  * @param src_ip
  23  *   The src ip value to match the input packet.
  24  * @param src_mask
  25  *   The mask to apply to the src ip.
  26  * @param dest_ip
  27  *   The dest ip value to match the input packet.
  28  * @param dest_mask
  29  *   The mask to apply to the dest ip.
  30  * @param[out] error
  31  *   Perform verbose error reporting if not NULL.
  32  *
  33  * @return
  34  *   A flow if the rule could be created else return NULL.
  35  */
  36 struct rte_flow *
  37 generate_ipv4_flow(uint16_t port_id, uint16_t rx_q,
  38                 uint32_t src_ip, uint32_t src_mask,
  39                 uint32_t dest_ip, uint32_t dest_mask,
  40                 struct rte_flow_error *error)
  41 {
  42         struct rte_flow_attr attr;
  43         struct rte_flow_item pattern[MAX_PATTERN_NUM];
  44         struct rte_flow_action action[MAX_PATTERN_NUM];
  45         struct rte_flow *flow = NULL;
  46         struct rte_flow_action_queue queue = { .index = rx_q };
  47         struct rte_flow_item_eth eth_spec;
  48         struct rte_flow_item_eth eth_mask;
  49         struct rte_flow_item_vlan vlan_spec;
  50         struct rte_flow_item_vlan vlan_mask;
  51         struct rte_flow_item_ipv4 ip_spec;
  52         struct rte_flow_item_ipv4 ip_mask;
  53         int res;
  54
  55         memset(pattern, 0, sizeof(pattern));
  56         memset(action, 0, sizeof(action));
  57
  58         /*
  59          * set the rule attribute.
  60          * in this case only ingress packets will be checked.
  61          */
  62         memset(&attr, 0, sizeof(struct rte_flow_attr));
  63         attr.ingress = 1;
  64
  65         /*
  66          * create the action sequence.
  67          * one action only,  move packet to queue
  68          */
  69
  70         action[0].type = RTE_FLOW_ACTION_TYPE_QUEUE;
  71         action[0].conf = &queue;
  72         action[1].type = RTE_FLOW_ACTION_TYPE_END;
  73
  74         /*
  75          * set the first level of the pattern (eth).
  76          * since in this example we just want to get the
  77          * ipv4 we set this level to allow all.
  78          */
  79         memset(&eth_spec, 0, sizeof(struct rte_flow_item_eth));
  80         memset(&eth_mask, 0, sizeof(struct rte_flow_item_eth));
  81         eth_spec.type = 0;
  82         eth_mask.type = 0;
  83         pattern[0].type = RTE_FLOW_ITEM_TYPE_ETH;
  84         pattern[0].spec = &eth_spec;
  85         pattern[0].mask = &eth_mask;
  86
  87         /*
  88          * setting the second level of the pattern (vlan).
  89          * since in this example we just want to get the
  90          * ipv4 we also set this level to allow all.
  91          */
  92         memset(&vlan_spec, 0, sizeof(struct rte_flow_item_vlan));
  93         memset(&vlan_mask, 0, sizeof(struct rte_flow_item_vlan));
  94         pattern[1].type = RTE_FLOW_ITEM_TYPE_VLAN;
  95         pattern[1].spec = &vlan_spec;
  96         pattern[1].mask = &vlan_mask;
  97
  98         /*
  99          * setting the third level of the pattern (ip).
 100          * in this example this is the level we care about
 101          * so we set it according to the parameters.
 102          */
 103         memset(&ip_spec, 0, sizeof(struct rte_flow_item_ipv4));
 104         memset(&ip_mask, 0, sizeof(struct rte_flow_item_ipv4));
 105         ip_spec.hdr.dst_addr = htonl(dest_ip);
 106         ip_mask.hdr.dst_addr = dest_mask;
 107         ip_spec.hdr.src_addr = htonl(src_ip);
 108         ip_mask.hdr.src_addr = src_mask;
 109         pattern[2].type = RTE_FLOW_ITEM_TYPE_IPV4;
 110         pattern[2].spec = &ip_spec;
 111         pattern[2].mask = &ip_mask;
 112
 113         /* the final level must be always type end */
 114         pattern[3].type = RTE_FLOW_ITEM_TYPE_END;
 115
 116         res = rte_flow_validate(port_id, &attr, pattern, action, error);
 117         if (!res)
 118                 flow = rte_flow_create(port_id, &attr, pattern, action, error);
 119
 120         return flow;
 121 }
 122