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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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8bab532233
Substitute deprecated xdp_cpumap and xdp_devmap sec_name with xdp/cpumap and xdp/devmap respectively. Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/509201497c6c4926bc941f1cba24173cf500e760.1643727185.git.lorenzo@kernel.org
77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#define KBUILD_MODNAME "foo"
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#include "vmlinux.h"
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#include "xdp_sample.bpf.h"
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#include "xdp_sample_shared.h"
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struct {
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__uint(type, BPF_MAP_TYPE_DEVMAP_HASH);
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__uint(key_size, sizeof(int));
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__uint(value_size, sizeof(int));
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__uint(max_entries, 32);
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} forward_map_general SEC(".maps");
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struct {
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__uint(type, BPF_MAP_TYPE_DEVMAP_HASH);
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__uint(key_size, sizeof(int));
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__uint(value_size, sizeof(struct bpf_devmap_val));
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__uint(max_entries, 32);
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} forward_map_native SEC(".maps");
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/* map to store egress interfaces mac addresses */
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struct {
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__uint(type, BPF_MAP_TYPE_HASH);
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__type(key, u32);
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__type(value, __be64);
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__uint(max_entries, 32);
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} mac_map SEC(".maps");
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static int xdp_redirect_map(struct xdp_md *ctx, void *forward_map)
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{
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u32 key = bpf_get_smp_processor_id();
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struct datarec *rec;
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rec = bpf_map_lookup_elem(&rx_cnt, &key);
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if (!rec)
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return XDP_PASS;
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NO_TEAR_INC(rec->processed);
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return bpf_redirect_map(forward_map, 0,
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BPF_F_BROADCAST | BPF_F_EXCLUDE_INGRESS);
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}
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SEC("xdp")
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int xdp_redirect_map_general(struct xdp_md *ctx)
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{
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return xdp_redirect_map(ctx, &forward_map_general);
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}
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SEC("xdp")
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int xdp_redirect_map_native(struct xdp_md *ctx)
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{
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return xdp_redirect_map(ctx, &forward_map_native);
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}
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SEC("xdp/devmap")
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int xdp_devmap_prog(struct xdp_md *ctx)
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{
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void *data_end = (void *)(long)ctx->data_end;
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void *data = (void *)(long)ctx->data;
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u32 key = ctx->egress_ifindex;
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struct ethhdr *eth = data;
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__be64 *mac;
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u64 nh_off;
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nh_off = sizeof(*eth);
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if (data + nh_off > data_end)
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return XDP_DROP;
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mac = bpf_map_lookup_elem(&mac_map, &key);
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if (mac)
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__builtin_memcpy(eth->h_source, mac, ETH_ALEN);
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return XDP_PASS;
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}
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char _license[] SEC("license") = "GPL";
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