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| author | Hari Bathini <hbathini@linux.ibm.com> | 2026-02-16 12:08:02 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-02-25 04:09:27 +0300 |
| commit | 8ebfe65e22d5016c0ef2f7b5831117202493f794 (patch) | |
| tree | 2e1f7bacde4e1ce01e57e145116768b7002be79d /tools/testing | |
| parent | c89b50cc6b9f3df4e21e5b9c10dcdfe830200c72 (diff) | |
| download | linux-8ebfe65e22d5016c0ef2f7b5831117202493f794.tar.xz | |
selftests/bpf: Test accounting of tail calls when prog is NULL
Test whether tail call count is incorrectly accounted for, when the
tail call fails due to a missing BPF program.
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Link: https://lore.kernel.org/r/20260216090802.1805655-1-hbathini@linux.ibm.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/tailcall3.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/progs/tailcall3.c b/tools/testing/selftests/bpf/progs/tailcall3.c index f60bcd7b8d4b..204f19c30a3e 100644 --- a/tools/testing/selftests/bpf/progs/tailcall3.c +++ b/tools/testing/selftests/bpf/progs/tailcall3.c @@ -5,7 +5,7 @@ struct { __uint(type, BPF_MAP_TYPE_PROG_ARRAY); - __uint(max_entries, 1); + __uint(max_entries, 2); __uint(key_size, sizeof(__u32)); __uint(value_size, sizeof(__u32)); } jmp_table SEC(".maps"); @@ -23,6 +23,9 @@ int classifier_0(struct __sk_buff *skb) SEC("tc") int entry(struct __sk_buff *skb) { + /* prog == NULL case */ + bpf_tail_call_static(skb, &jmp_table, 1); + bpf_tail_call_static(skb, &jmp_table, 0); return 0; } |