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// SPDX-License-Identifier: GPL-2.0
#define KBUILD_MODNAME "foo"
#include "vmlinux.h"
#include "xdp_sample.bpf.h"
#include "xdp_sample_shared.h"
struct {
__uint(type, BPF_MAP_TYPE_DEVMAP_HASH);
__uint(key_size, sizeof(int));
__uint(value_size, sizeof(int));
__uint(max_entries, 32);
} forward_map_general SEC(".maps");
struct {
__uint(type, BPF_MAP_TYPE_DEVMAP_HASH);
__uint(key_size, sizeof(int));
__uint(value_size, sizeof(struct bpf_devmap_val));
__uint(max_entries, 32);
} forward_map_native SEC(".maps");
/* map to store egress interfaces mac addresses */
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__type(key, u32);
__type(value, __be64);
__uint(max_entries, 32);
} mac_map SEC(".maps");
static int xdp_redirect_map(struct xdp_md *ctx, void *forward_map)
{
u32 key = bpf_get_smp_processor_id();
struct datarec *rec;
rec = bpf_map_lookup_elem(&rx_cnt, &key);
if (!rec)
return XDP_PASS;
NO_TEAR_INC(rec->processed);
return bpf_redirect_map(forward_map, 0,
BPF_F_BROADCAST | BPF_F_EXCLUDE_INGRESS);
}
SEC("xdp")
int xdp_redirect_map_general(struct xdp_md *ctx)
{
return xdp_redirect_map(ctx, &forward_map_general);
}
SEC("xdp")
int xdp_redirect_map_native(struct xdp_md *ctx)
{
return xdp_redirect_map(ctx, &forward_map_native);
}
SEC("xdp_devmap/egress")
int xdp_devmap_prog(struct xdp_md *ctx)
{
void *data_end = (void *)(long)ctx->data_end;
void *data = (void *)(long)ctx->data;
u32 key = ctx->egress_ifindex;
struct ethhdr *eth = data;
__be64 *mac;
u64 nh_off;
nh_off = sizeof(*eth);
if (data + nh_off > data_end)
return XDP_DROP;
mac = bpf_map_lookup_elem(&mac_map, &key);
if (mac)
__builtin_memcpy(eth->h_source, mac, ETH_ALEN);
return XDP_PASS;
}
char _license[] SEC("license") = "GPL";
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