From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- .../selftests/bpf/progs/tailcall_bpf2bpf2.c | 40 ++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/tailcall_bpf2bpf2.c (limited to 'tools/testing/selftests/bpf/progs/tailcall_bpf2bpf2.c') diff --git a/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf2.c b/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf2.c new file mode 100644 index 000000000..ce97d141d --- /dev/null +++ b/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf2.c @@ -0,0 +1,40 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include "bpf_legacy.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 __noinline +int subprog_tail(struct __sk_buff *skb) +{ + if (load_byte(skb, 0)) + bpf_tail_call_static(skb, &jmp_table, 1); + else + bpf_tail_call_static(skb, &jmp_table, 0); + return 1; +} + +int count = 0; + +SEC("tc") +int classifier_0(struct __sk_buff *skb) +{ + count++; + return subprog_tail(skb); +} + +SEC("tc") +int entry(struct __sk_buff *skb) +{ + bpf_tail_call_static(skb, &jmp_table, 0); + + return 0; +} + +char __license[] SEC("license") = "GPL"; -- cgit v1.2.3