1 files changed, 59 insertions, 0 deletions

diff --git a/tools/testing/selftests/bpf/test_queue_stack_map.h b/tools/testing/selftests/bpf/test_queue_stack_map.h
new file mode 100644
index 000000000000..295b9b3bc5c7
--- /dev/null
+++ b/tools/testing/selftests/bpf/test_queue_stack_map.h
@@ -0,0 +1,59 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+// Copyright (c) 2018 Politecnico di Torino
+#include <stddef.h>
+#include <string.h>
+#include <linux/bpf.h>
+#include <linux/if_ether.h>
+#include <linux/ip.h>
+#include <linux/pkt_cls.h>
+#include "bpf_helpers.h"
+
+int _version SEC("version") = 1;
+
+struct bpf_map_def __attribute__ ((section("maps"), used)) map_in = {
+        .type = MAP_TYPE,
+        .key_size = 0,
+        .value_size = sizeof(__u32),
+        .max_entries = 32,
+        .map_flags = 0,
+};
+
+struct bpf_map_def __attribute__ ((section("maps"), used)) map_out = {
+        .type = MAP_TYPE,
+        .key_size = 0,
+        .value_size = sizeof(__u32),
+        .max_entries = 32,
+        .map_flags = 0,
+};
+
+SEC("test")
+int _test(struct __sk_buff *skb)
+{
+        void *data_end = (void *)(long)skb->data_end;
+        void *data = (void *)(long)skb->data;
+        struct ethhdr *eth = (struct ethhdr *)(data);
+        __u32 value;
+        int err;
+
+        if (eth + 1 > data_end)
+                return TC_ACT_SHOT;
+
+        struct iphdr *iph = (struct iphdr *)(eth + 1);
+
+        if (iph + 1 > data_end)
+                return TC_ACT_SHOT;
+
+        err = bpf_map_pop_elem(&map_in, &value);
+        if (err)
+                return TC_ACT_SHOT;
+
+        iph->daddr = value;
+
+        err = bpf_map_push_elem(&map_out, &iph->saddr, 0);
+        if (err)
+                return TC_ACT_SHOT;
+
+        return TC_ACT_OK;
+}
+
+char _license[] SEC("license") = "GPL";