examples/flow_filtering/snippets/snippet_match_vxlan_gbp.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright (c) 2022 NVIDIA Corporation & Affiliates
 */

#include <stdlib.h>
#include <rte_flow.h>

#include "../common.h"
#include "../jump_flow.h"
#include "snippet_match_vxlan_gbp.h"

void
snippet_init_vxlan_gbp(void)
{
    flow_attr.ingress = 1;
    flow_attr.group = 0;
}

void
snippet_match_vxlan_gbp_create_actions(__rte_unused uint16_t port_id,
                    struct rte_flow_action *action)
{
    struct rte_flow_action_queue *queue = calloc(1, sizeof(struct rte_flow_action_queue));
    if (queue == NULL)
        fprintf(stderr, "Failed to allocate memory for queue\n");

    queue->index = 1;

    action[0].type = RTE_FLOW_ACTION_TYPE_QUEUE;
    action[0].conf = queue;
    action[1].type = RTE_FLOW_ACTION_TYPE_END;
}

void
snippet_match_vxlan_gbp_create_patterns(struct rte_flow_item *pattern)
{
    struct rte_flow_item_vxlan *vxlan_gbp = calloc(1, sizeof(struct rte_flow_item_vxlan));
    if (vxlan_gbp == NULL)
        fprintf(stderr, "Failed to allocate memory for vxlan_gbp\n");

    struct rte_flow_item_vxlan *vxlan_gbp_mask = calloc(1, sizeof(struct rte_flow_item_vxlan));
    if (vxlan_gbp_mask == NULL)
        fprintf(stderr, "Failed to allocate memory for vxlan_gbp_mask\n");

    uint8_t vni[] = {0x00, 0x00, 0x00};
    uint16_t group_policy_id = 0x200;

    memcpy(vxlan_gbp_mask->hdr.vni, "\xff\xff\xff", 3);
    vxlan_gbp_mask->hdr.flags = 0xff;
    vxlan_gbp_mask->hdr.policy_id = 0xffff;

    vxlan_gbp->flags = 0x88;
    memcpy(vxlan_gbp->vni, vni, 3);
    vxlan_gbp->hdr.rsvd0[1] = (group_policy_id >> 8) & 0xff;
    vxlan_gbp->hdr.rsvd0[2] = group_policy_id & 0xff;
    pattern[0].type = RTE_FLOW_ITEM_TYPE_ETH;
    pattern[1].type = RTE_FLOW_ITEM_TYPE_IPV4;
    pattern[2].type = RTE_FLOW_ITEM_TYPE_UDP;
    pattern[3].type = RTE_FLOW_ITEM_TYPE_VXLAN;
    pattern[3].spec = vxlan_gbp;
    pattern[3].mask = vxlan_gbp_mask;
    pattern[4].type = RTE_FLOW_ITEM_TYPE_END;

}

static struct rte_flow_pattern_template *
snippet_match_vxlan_gbp_create_pattern_template(uint16_t port_id,
    struct rte_flow_error *error)
{
    struct rte_flow_item pattern[MAX_PATTERN_NUM] = {0};

    struct rte_flow_item_vxlan vxlan_gbp_mask = {
        .hdr.vni = {0xff, 0xff, 0xff},
        .hdr.flags = 0xff,
        .hdr.policy_id = 0xffff,
    };

    pattern[0].type = RTE_FLOW_ITEM_TYPE_ETH;
    pattern[1].type = RTE_FLOW_ITEM_TYPE_IPV4;
    pattern[2].type = RTE_FLOW_ITEM_TYPE_UDP;
    pattern[3].type = RTE_FLOW_ITEM_TYPE_VXLAN;
    pattern[3].mask = &vxlan_gbp_mask;
    pattern[4].type = RTE_FLOW_ITEM_TYPE_END;

    const struct rte_flow_pattern_template_attr pt_attr = {
        .relaxed_matching = 0,
        .ingress = 1,
    };

    return rte_flow_pattern_template_create(port_id, &pt_attr, pattern, error);
}

static struct rte_flow_actions_template *
snippet_match_vxlan_gbp_create_actions_template(uint16_t port_id,
    struct rte_flow_error *error)
{
    struct rte_flow_action action[MAX_ACTION_NUM] = {0};
    struct rte_flow_action masks[MAX_ACTION_NUM] = {0};

    struct rte_flow_action_queue queue_v = {
        .index = 1,
    };
    struct rte_flow_action_queue queue_m = {
        .index = UINT16_MAX,
    };

    action[0].type = RTE_FLOW_ACTION_TYPE_QUEUE;
    action[0].conf = &queue_v;
    action[1].type = RTE_FLOW_ACTION_TYPE_END;

    masks[0].type = RTE_FLOW_ACTION_TYPE_QUEUE;
    masks[0].conf = &queue_m;
    masks[1].type = RTE_FLOW_ACTION_TYPE_END;

    const struct rte_flow_actions_template_attr at_attr = {
        .ingress = 1,
    };

    return rte_flow_actions_template_create(port_id, &at_attr, action, masks, error);
}

struct rte_flow_template_table *
snippet_match_vxlan_gbp_create_table(uint16_t port_id, struct rte_flow_error *error)
{
    struct rte_flow_pattern_template *pt;
    struct rte_flow_actions_template *at;
    const struct rte_flow_template_table_attr tbl_attr = {
        .flow_attr = {
            .group = 0,
            .priority = 0,
            .ingress = 1,
        },
        .nb_flows = 1000,
    };

    pt = snippet_match_vxlan_gbp_create_pattern_template(port_id, error);
    if (pt == NULL) {
        printf("Failed to create pattern template: %s (%s)\n",
        error->message, rte_strerror(rte_errno));
        return NULL;
    }

    at = snippet_match_vxlan_gbp_create_actions_template(port_id, error);
    if (at == NULL) {
        printf("Failed to create actions template: %s (%s)\n",
        error->message, rte_strerror(rte_errno));
        return NULL;
    }

    return rte_flow_template_table_create(port_id, &tbl_attr, &pt, 1, &at, 1, error);
}