Add files for performance test

Author: mauriciobomfim

samples/bpf/Makefile

@@ -178,6 +178,9 @@ always-y += hbm_edt_kern.o
 always-y += xdpsock_kern.o
 # CONFIG_XDP_LUA
 always-y += xdplua_map_kern.o
+always-y += xdp_ssl_sni_drop_all.o
+always-y += xdp_ssl_sni_drop_ebpf.o
+always-y += xdp_ssl_sni_drop_lua.o
 
 ifeq ($(ARCH), arm)
 # Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux
@@ -221,6 +224,7 @@ OPT ?= opt
 LLVM_DIS ?= llvm-dis
 LLVM_OBJCOPY ?= llvm-objcopy
 BTF_PAHOLE ?= pahole
+LLVM_READELF ?= llvm-readelf
 
 # Detect that we're cross compiling and use the cross compiler
 ifdef CROSS_COMPILE

samples/bpf/xdp_ssl_parser_common.h

@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2019-2021 Victor Nogueira <victor.nogueira@ring-0.io>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+struct sslsni_wrapper {
+		char sslsni[100];
+};

samples/bpf/xdp_ssl_sni_drop_all.c

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2019-2021 Victor Nogueira <victor.nogueira@ring-0.io>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; 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 "bpf_helpers.h"
+#include "bpf_endian.h"
+
+struct bpf_map_def SEC("maps") rx_cnt = {
+	.type = BPF_MAP_TYPE_PERCPU_ARRAY,
+	.key_size = sizeof(u32),
+	.value_size = sizeof(long),
+	.max_entries = 1,
+};
+
+SEC("sslparser")
+int handle_ingress(struct xdp_md *ctx)
+{
+	u32 key_rx = 0;
+	long *cnt;
+
+	cnt = bpf_map_lookup_elem(&rx_cnt, &key_rx);
+	if (!cnt)
+		return XDP_PASS;
+
+	(*cnt)++;
+
+	return XDP_DROP;
+}
+char _license[] SEC("license") = "GPL";