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Diffstat (limited to 'tools/testing/selftests/bpf/progs/tailcall3.c')
-rw-r--r--tools/testing/selftests/bpf/progs/tailcall3.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/tailcall3.c b/tools/testing/selftests/bpf/progs/tailcall3.c
new file mode 100644
index 000000000000..1ecae198b8c1
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/tailcall3.c
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/bpf.h>
+
+#include "bpf_helpers.h"
+
+struct {
+ __uint(type, BPF_MAP_TYPE_PROG_ARRAY);
+ __uint(max_entries, 1);
+ __uint(key_size, sizeof(__u32));
+ __uint(value_size, sizeof(__u32));
+} jmp_table SEC(".maps");
+
+static volatile int count;
+
+SEC("classifier/0")
+int bpf_func_0(struct __sk_buff *skb)
+{
+ count++;
+ bpf_tail_call(skb, &jmp_table, 0);
+ return 1;
+}
+
+SEC("classifier")
+int entry(struct __sk_buff *skb)
+{
+ bpf_tail_call(skb, &jmp_table, 0);
+ return 0;
+}
+
+char __license[] SEC("license") = "GPL";
+int _version SEC("version") = 1;