bpftool: Add autoattach for bpf prog load|loadall
Add autoattach optional to support one-step load-attach-pin_link.
For example,
$ bpftool prog loadall test.o /sys/fs/bpf/test autoattach
$ bpftool link
26: tracing name test1 tag
f0da7d0058c00236 gpl
loaded_at 2022-09-09T21:39:49+0800 uid 0
xlated 88B jited 55B memlock 4096B map_ids 3
btf_id 55
28: kprobe name test3 tag
002ef1bef0723833 gpl
loaded_at 2022-09-09T21:39:49+0800 uid 0
xlated 88B jited 56B memlock 4096B map_ids 3
btf_id 55
57: tracepoint name oncpu tag
7aa55dfbdcb78941 gpl
loaded_at 2022-09-09T21:41:32+0800 uid 0
xlated 456B jited 265B memlock 4096B map_ids 17,13,14,15
btf_id 82
$ bpftool link
1: tracing prog 26
prog_type tracing attach_type trace_fentry
3: perf_event prog 28
10: perf_event prog 57
The autoattach optional can support tracepoints, k(ret)probes,
u(ret)probes.
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Wang Yufen <wangyufen@huawei.com>
Link: https://lore.kernel.org/r/1665736275-28143-2-git-send-email-wangyufen@huawei.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>