mirror of
https://github.com/torvalds/linux.git
synced 2024-11-25 21:51:40 +00:00
66fc4ca85d
We moved swap_src_dst_mac to xdp_sample.bpf.h to be shared with other
potential users, so drop it while moving code to the new file.
Also, consistently use SEC("xdp") naming instead.
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210821002010.845777-16-memxor@gmail.com
50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (c) 2016 John Fastabend <john.r.fastabend@intel.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of version 2 of the GNU General Public
|
|
* License as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*/
|
|
#include "vmlinux.h"
|
|
#include "xdp_sample.bpf.h"
|
|
#include "xdp_sample_shared.h"
|
|
|
|
const volatile int ifindex_out;
|
|
|
|
SEC("xdp")
|
|
int xdp_redirect_prog(struct xdp_md *ctx)
|
|
{
|
|
void *data_end = (void *)(long)ctx->data_end;
|
|
void *data = (void *)(long)ctx->data;
|
|
u32 key = bpf_get_smp_processor_id();
|
|
struct ethhdr *eth = data;
|
|
struct datarec *rec;
|
|
u64 nh_off;
|
|
|
|
nh_off = sizeof(*eth);
|
|
if (data + nh_off > data_end)
|
|
return XDP_DROP;
|
|
|
|
rec = bpf_map_lookup_elem(&rx_cnt, &key);
|
|
if (!rec)
|
|
return XDP_PASS;
|
|
NO_TEAR_INC(rec->processed);
|
|
|
|
swap_src_dst_mac(data);
|
|
return bpf_redirect(ifindex_out, 0);
|
|
}
|
|
|
|
/* Redirect require an XDP bpf_prog loaded on the TX device */
|
|
SEC("xdp")
|
|
int xdp_redirect_dummy_prog(struct xdp_md *ctx)
|
|
{
|
|
return XDP_PASS;
|
|
}
|
|
|
|
char _license[] SEC("license") = "GPL";
|