projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 66fc4ca8 KKD |
1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* Copyright (c) 2016 John Fastabend <john.r.fastabend@intel.com> | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or | |
| 5 | * modify it under the terms of version 2 of the GNU General Public | |
| 6 | * License as published by the Free Software Foundation. | |
| 7 | * | |
| 8 | * This program is distributed in the hope that it will be useful, but | |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 11 | * General Public License for more details. | |
| 12 | */ | |
| 13 | #include "vmlinux.h" | |
| 14 | #include "xdp_sample.bpf.h" | |
| 15 | #include "xdp_sample_shared.h" | |
| 16 | ||
| 17 | const volatile int ifindex_out; | |
| 18 | ||
| 19 | SEC("xdp") | |
| 20 | int xdp_redirect_prog(struct xdp_md *ctx) | |
| 21 | { | |
| 22 | void *data_end = (void *)(long)ctx->data_end; | |
| 23 | void *data = (void *)(long)ctx->data; | |
| 24 | u32 key = bpf_get_smp_processor_id(); | |
| 25 | struct ethhdr *eth = data; | |
| 26 | struct datarec *rec; | |
| 27 | u64 nh_off; | |
| 28 | ||
| 29 | nh_off = sizeof(*eth); | |
| 30 | if (data + nh_off > data_end) | |
| 31 | return XDP_DROP; | |
| 32 | ||
| 33 | rec = bpf_map_lookup_elem(&rx_cnt, &key); | |
| 34 | if (!rec) | |
| 35 | return XDP_PASS; | |
| 36 | NO_TEAR_INC(rec->processed); | |
| 37 | ||
| 38 | swap_src_dst_mac(data); | |
| 39 | return bpf_redirect(ifindex_out, 0); | |
| 40 | } | |
| 41 | ||
| 42 | /* Redirect require an XDP bpf_prog loaded on the TX device */ | |
| 43 | SEC("xdp") | |
| 44 | int xdp_redirect_dummy_prog(struct xdp_md *ctx) | |
| 45 | { | |
| 46 | return XDP_PASS; | |
| 47 | } | |
| 48 | ||
| 49 | char _license[] SEC("license") = "GPL"; |