[PATCH bpf-next 1/5] bpf: Add cookie to tracing bpf_link_info

[Tao Chen <chen.dylane@linux.dev>]

bpf_tramp_link includes cookie info, we can add it in bpf_link_info.

Signed-off-by: Tao Chen <chen.dylane@linux.dev>
---
 include/uapi/linux/bpf.h       | 2 ++
 kernel/bpf/syscall.c           | 1 +
 tools/include/uapi/linux/bpf.h | 2 ++
 3 files changed, 5 insertions(+)

diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index f1160ebbf52..fd4869d8cd1 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -6658,6 +6658,8 @@ struct bpf_link_info {
 			__u32 attach_type;
 			__u32 target_obj_id; /* prog_id for PROG_EXT, otherwise btf object id */
 			__u32 target_btf_id; /* BTF type id inside the object */
+			__u32 :32;
+			__u64 cookie;
 		} tracing;
 		struct {
 			__u64 cgroup_id;
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 89d027cd7ca..4c0ac083518 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -3416,6 +3416,7 @@ static int bpf_tracing_link_fill_link_info(const struct bpf_link *link,
 		container_of(link, struct bpf_tracing_link, link.link);
 
 	info->tracing.attach_type = tr_link->attach_type;
+	info->tracing.cookie = tr_link->link.cookie;
 	bpf_trampoline_unpack_key(tr_link->trampoline->key,
 				  &info->tracing.target_obj_id,
 				  &info->tracing.target_btf_id);
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index f1160ebbf52..fd4869d8cd1 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -6658,6 +6658,8 @@ struct bpf_link_info {
 			__u32 attach_type;
 			__u32 target_obj_id; /* prog_id for PROG_EXT, otherwise btf object id */
 			__u32 target_btf_id; /* BTF type id inside the object */
+			__u32 :32;
+			__u64 cookie;
 		} tracing;
 		struct {
 			__u64 cgroup_id;
-- 
2.43.0