On Wed, Dec 06, 2017 at 02:07:44PM -0800, Yonghong Song wrote:
> Commit e87c6bc3852b ("bpf: permit multiple bpf attachments
> for a single perf event") added support to attach multiple
> bpf programs to a single perf event. Given a perf event
> (kprobe, uprobe, or kernel tracepoint), the perf ioctl interface
> is used to query bpf programs attached to the same trace event.
>
> There already exists a BPF_PROG_QUERY command for introspection
> currently used by cgroup+bpf. We did have an implementation for
> querying tracepoint+bpf through the same interface. However, it
> looks cleaner to use ioctl() style of api here, since attaching
> bpf prog to tracepoint/kuprobe is also done via ioctl.
>
> Patch #1 had the core implementation and patch #2 added
> a test case in tools bpf selftests suite.
>
> Changelogs:
> v2 -> v3:
> - Change uapi structure perf_event_query_bpf to be more
> clearer based on Peter's suggestion, and adjust
> other codes accordingly.
Peter,
could you please ack the patch 1 ?
We'd like to route the set via bpf-next -> net-next trees.
