samples/bpf: Remove the xdp_redirect* utilities

These utilities have all been ported to xdp-tools as functions of the
xdp-bench utility. The four different utilities in samples are incorporated
as separate subcommands to xdp-bench, with most of the command line
parameters left intact, except that mandatory arguments are always
positional in xdp-bench. For full usage details see the --help output of
each command, or the xdp-bench man page.

Some examples of how to convert usage to xdp-bench are:

xdp_redirect eth0 eth1
  --> xdp-bench redirect eth0 eth1

xdp_redirect_map eth0 eth1
  --> xdp-bench redirect-map eth0 eth1

xdp_redirect_map_multi eth0 eth1 eth2 eth3
  --> xdp-bench redirect-multi eth0 eth1 eth2 eth3

xdp_redirect_cpu -d eth0 -c 0 -c 1
  --> xdp-bench redirect-cpu -c 0 -c 1 eth0

xdp_redirect_cpu -d eth0 -c 0 -c 1 -r eth1
  --> xdp-bench redirect-cpu -c 0 -c 1 eth0 -r redirect -D eth1

Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/r/20230824102255.1561885-3-toke@redhat.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 0 insertions, 97 deletions

diff --git a/samples/bpf/xdp_redirect_map.bpf.c b/samples/bpf/xdp_redirect_map.bpf.c
deleted file mode 100644
index 8557c278df77..000000000000
--- a/samples/bpf/xdp_redirect_map.bpf.c
+++ /dev/null
@@ -1,97 +0,0 @@
-/* Copyright (c) 2017 Covalent IO, Inc. http://covalent.io
- *
- * 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 "vmlinux.h"
-#include "xdp_sample.bpf.h"
-#include "xdp_sample_shared.h"
-
-/* The 2nd xdp prog on egress does not support skb mode, so we define two
- * maps, tx_port_general and tx_port_native.
- */
-struct {
-	__uint(type, BPF_MAP_TYPE_DEVMAP);
-	__uint(key_size, sizeof(int));
-	__uint(value_size, sizeof(int));
-	__uint(max_entries, 1);
-} tx_port_general SEC(".maps");
-
-struct {
-	__uint(type, BPF_MAP_TYPE_DEVMAP);
-	__uint(key_size, sizeof(int));
-	__uint(value_size, sizeof(struct bpf_devmap_val));
-	__uint(max_entries, 1);
-} tx_port_native SEC(".maps");
-
-/* store egress interface mac address */
-const volatile __u8 tx_mac_addr[ETH_ALEN];
-
-static __always_inline int xdp_redirect_map(struct xdp_md *ctx, void *redirect_map)
-{
-	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_map(redirect_map, 0, 0);
-}
-
-SEC("xdp")
-int xdp_redirect_map_general(struct xdp_md *ctx)
-{
-	return xdp_redirect_map(ctx, &tx_port_general);
-}
-
-SEC("xdp")
-int xdp_redirect_map_native(struct xdp_md *ctx)
-{
-	return xdp_redirect_map(ctx, &tx_port_native);
-}
-
-SEC("xdp/devmap")
-int xdp_redirect_map_egress(struct xdp_md *ctx)
-{
-	void *data_end = (void *)(long)ctx->data_end;
-	void *data = (void *)(long)ctx->data;
-	u8 *mac_addr = (u8 *) tx_mac_addr;
-	struct ethhdr *eth = data;
-	u64 nh_off;
-
-	nh_off = sizeof(*eth);
-	if (data + nh_off > data_end)
-		return XDP_DROP;
-
-	barrier_var(mac_addr); /* prevent optimizing out memcpy */
-	__builtin_memcpy(eth->h_source, mac_addr, ETH_ALEN);
-
-	return XDP_PASS;
-}
-
-/* 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";