mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
b83b936f3e
Add some test cases to confirm the tailcall hierarchy issue has been fixed. On x64, the selftests result is: cd tools/testing/selftests/bpf && ./test_progs -t tailcalls 327/18 tailcalls/tailcall_bpf2bpf_hierarchy_1:OK 327/19 tailcalls/tailcall_bpf2bpf_hierarchy_fentry:OK 327/20 tailcalls/tailcall_bpf2bpf_hierarchy_fexit:OK 327/21 tailcalls/tailcall_bpf2bpf_hierarchy_fentry_fexit:OK 327/22 tailcalls/tailcall_bpf2bpf_hierarchy_fentry_entry:OK 327/23 tailcalls/tailcall_bpf2bpf_hierarchy_2:OK 327/24 tailcalls/tailcall_bpf2bpf_hierarchy_3:OK 327 tailcalls:OK Summary: 1/24 PASSED, 0 SKIPPED, 0 FAILED On arm64, the selftests result is: cd tools/testing/selftests/bpf && ./test_progs -t tailcalls 327/18 tailcalls/tailcall_bpf2bpf_hierarchy_1:OK 327/19 tailcalls/tailcall_bpf2bpf_hierarchy_fentry:OK 327/20 tailcalls/tailcall_bpf2bpf_hierarchy_fexit:OK 327/21 tailcalls/tailcall_bpf2bpf_hierarchy_fentry_fexit:OK 327/22 tailcalls/tailcall_bpf2bpf_hierarchy_fentry_entry:OK 327/23 tailcalls/tailcall_bpf2bpf_hierarchy_2:OK 327/24 tailcalls/tailcall_bpf2bpf_hierarchy_3:OK 327 tailcalls:OK Summary: 1/24 PASSED, 0 SKIPPED, 0 FAILED Acked-by: Eduard Zingerman <eddyz87@gmail.com> Signed-off-by: Leon Hwang <hffilwlqm@gmail.com> Link: https://lore.kernel.org/r/20240714123902.32305-4-hffilwlqm@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
34 lines
585 B
C
34 lines
585 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/bpf.h>
|
|
#include <bpf/bpf_helpers.h>
|
|
#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");
|
|
|
|
int count = 0;
|
|
|
|
static __noinline
|
|
int subprog_tail(struct __sk_buff *skb)
|
|
{
|
|
bpf_tail_call_static(skb, &jmp_table, 0);
|
|
return 0;
|
|
}
|
|
|
|
SEC("tc")
|
|
int entry(struct __sk_buff *skb)
|
|
{
|
|
int ret = 1;
|
|
|
|
count++;
|
|
subprog_tail(skb);
|
|
subprog_tail(skb);
|
|
|
|
return ret;
|
|
}
|
|
|
|
char __license[] SEC("license") = "GPL";
|