diff options
author | Jiri Olsa <jolsa@kernel.org> | 2020-09-29 15:45:56 +0300 |
---|---|---|
committer | Alexei Starovoitov <ast@kernel.org> | 2020-09-29 23:09:24 +0300 |
commit | 17d3f386757609223aa02342d29526daa67efafc (patch) | |
tree | 4eba22b7e92439c1832a044eeeddd4e8fc8a0c7f /tools/testing/selftests/bpf/progs/test_trace_ext.c | |
parent | f6429476c2012afade24741cc08890371d2842b4 (diff) | |
download | linux-17d3f386757609223aa02342d29526daa67efafc.tar.xz |
selftests/bpf: Adding test for arg dereference in extension trace
Adding test that setup following program:
SEC("classifier/test_pkt_md_access")
int test_pkt_md_access(struct __sk_buff *skb)
with its extension:
SEC("freplace/test_pkt_md_access")
int test_pkt_md_access_new(struct __sk_buff *skb)
and tracing that extension with:
SEC("fentry/test_pkt_md_access_new")
int BPF_PROG(fentry, struct sk_buff *skb)
The test verifies that the tracing program can
dereference skb argument properly.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/160138355603.48470.9072073357530773228.stgit@toke.dk
Diffstat (limited to 'tools/testing/selftests/bpf/progs/test_trace_ext.c')
-rw-r--r-- | tools/testing/selftests/bpf/progs/test_trace_ext.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/test_trace_ext.c b/tools/testing/selftests/bpf/progs/test_trace_ext.c new file mode 100644 index 000000000000..d19a634d0e78 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_trace_ext.c @@ -0,0 +1,18 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2019 Facebook +#include <linux/bpf.h> +#include <stdbool.h> +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_endian.h> +#include <bpf/bpf_tracing.h> + +__u64 ext_called = 0; + +SEC("freplace/test_pkt_md_access") +int test_pkt_md_access_new(struct __sk_buff *skb) +{ + ext_called = skb->len; + return 0; +} + +char _license[] SEC("license") = "GPL"; |