[PATCH 10/13] libbpf: Add bpf_link_create support for multi kprobes

Jiri Olsa
2022-01-04T08:11:01Z

Adding new kprobe struct in bpf_link_create_opts object
to pass multi kprobe data to link_create attr API.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/lib/bpf/bpf.c | 5 +++++
tools/lib/bpf/bpf.h | 7 ++++++-
2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 9b64eed2b003..40cad575ad62 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -848,6 +848,11 @@ int bpf_link_create(int prog_fd, int target_fd,
if (!OPTS_ZEROED(opts, perf_event))
return libbpf_err(-EINVAL);
break;
+ case BPF_TRACE_RAW_KPROBE:
+ attr.link_create.kprobe.addrs = OPTS_GET(opts, kprobe.addrs, 0);
+ attr.link_create.kprobe.cnt = OPTS_GET(opts, kprobe.cnt, 0);
+ attr.link_create.kprobe.bpf_cookie = OPTS_GET(opts, kprobe.bpf_cookie, 0);
+ break;
default:
if (!OPTS_ZEROED(opts, flags))
return libbpf_err(-EINVAL);
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index 00619f64a040..9611023138b1 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -298,10 +298,15 @@ struct bpf_link_create_opts {
struct {
__u64 bpf_cookie;
} perf_event;
+ struct {
+ __u64 addrs;
+ __u32 cnt;
+ __u64 bpf_cookie;
+ } kprobe;
};
size_t :0;
};
-#define bpf_link_create_opts__last_field perf_event
+#define bpf_link_create_opts__last_field kprobe.bpf_cookie

LIBBPF_API int bpf_link_create(int prog_fd, int target_fd,
enum bpf_attach_type attach_type,
--
2.33.1