bpf: Return target info when a tracing bpf_link is queried

There is currently no way to discover the target of a tracing program attachment after the fact. Add this information to bpf_link_info and return it when querying the bpf_link fd.

Toke Høiland-Jørgensen committed 5 years ago

Commit 441e8c61 parent db16c1f4 files · +16 −0Browse files

Showing the changes to include/uapi (1 of 4 files). Show all

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include/uapi/linux/bpf.h+2−0

@@ -5416,6 +5416,8 @@ struct bpf_link_info { · 5415 unmodified lines
5416	5416	} raw_tracepoint;
5417	5417	struct {
5418	5418	__u32 attach_type;
	5419	+ __u32 target_obj_id; /* prog_id for PROG_EXT, otherwise btf object id */
	5420	+ __u32 target_btf_id; /* BTF type id inside the object */
5419	5421	} tracing;
5420	5422	struct {
5421	5423	__u64 cgroup_id;