samples: bpf: Convert xdp_redirect_kern.o to XDP samples helper

[sfrench/cifs-2.6.git] / samples / bpf / xdp_redirect_kern.c

diff --git a/samples/bpf/xdp_redirect_kern.c b/samples/bpf/xdp_redirect_kern.c
deleted file mode 100644 (file)
index d26ec3a..0000000
--- a/samples/bpf/xdp_redirect_kern.c
+++ /dev/null
@@ -1,90 +0,0 @@
-/* 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.
- */
-#define KBUILD_MODNAME "foo"
-#include <uapi/linux/bpf.h>
-#include <linux/in.h>
-#include <linux/if_ether.h>
-#include <linux/if_packet.h>
-#include <linux/if_vlan.h>
-#include <linux/ip.h>
-#include <linux/ipv6.h>
-#include <bpf/bpf_helpers.h>
-
-struct {
-       __uint(type, BPF_MAP_TYPE_ARRAY);
-       __type(key, int);
-       __type(value, int);
-       __uint(max_entries, 1);
-} tx_port SEC(".maps");
-
-/* Count RX packets, as XDP bpf_prog doesn't get direct TX-success
- * feedback.  Redirect TX errors can be caught via a tracepoint.
- */
-struct {
-       __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
-       __type(key, u32);
-       __type(value, long);
-       __uint(max_entries, 1);
-} rxcnt SEC(".maps");
-
-static void swap_src_dst_mac(void *data)
-{
-       unsigned short *p = data;
-       unsigned short dst[3];
-
-       dst[0] = p[0];
-       dst[1] = p[1];
-       dst[2] = p[2];
-       p[0] = p[3];
-       p[1] = p[4];
-       p[2] = p[5];
-       p[3] = dst[0];
-       p[4] = dst[1];
-       p[5] = dst[2];
-}
-
-SEC("xdp_redirect")
-int xdp_redirect_prog(struct xdp_md *ctx)
-{
-       void *data_end = (void *)(long)ctx->data_end;
-       void *data = (void *)(long)ctx->data;
-       struct ethhdr *eth = data;
-       int rc = XDP_DROP;
-       int *ifindex, port = 0;
-       long *value;
-       u32 key = 0;
-       u64 nh_off;
-
-       nh_off = sizeof(*eth);
-       if (data + nh_off > data_end)
-               return rc;
-
-       ifindex = bpf_map_lookup_elem(&tx_port, &port);
-       if (!ifindex)
-               return rc;
-
-       value = bpf_map_lookup_elem(&rxcnt, &key);
-       if (value)
-               *value += 1;
-
-       swap_src_dst_mac(data);
-       return bpf_redirect(*ifindex, 0);
-}
-
-/* Redirect require an XDP bpf_prog loaded on the TX device */
-SEC("xdp_redirect_dummy")
-int xdp_redirect_dummy_prog(struct xdp_md *ctx)
-{
-       return XDP_PASS;
-}
-
-char _license[] SEC("license") = "GPL";