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49 lines
1.3 KiB
49 lines
1.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* Copyright (c) 2016 John Fastabend <[email protected]> |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of version 2 of the GNU General Public |
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* License as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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*/ |
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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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const volatile int ifindex_out; |
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SEC("xdp") |
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int xdp_redirect_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 = bpf_get_smp_processor_id(); |
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struct ethhdr *eth = data; |
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struct datarec *rec; |
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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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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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swap_src_dst_mac(data); |
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return bpf_redirect(ifindex_out, 0); |
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} |
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/* Redirect require an XDP bpf_prog loaded on the TX device */ |
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SEC("xdp") |
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int xdp_redirect_dummy_prog(struct xdp_md *ctx) |
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{ |
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return XDP_PASS; |
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} |
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char _license[] SEC("license") = "GPL";
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