linux-kernel - [PATCH bpf-next v6 0/2] bpf: enable some functions in cgroup programs

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Message-ID: <20240819162805.78235-1-technoboy85@gmail.com>
Date: Mon, 19 Aug 2024 18:28:03 +0200
From: Matteo Croce <technoboy85@...il.com>
To: Andrii Nakryiko <andrii@...nel.org>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	bpf@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	Matteo Croce <teknoraver@...a.com>
Subject: [PATCH bpf-next v6 0/2] bpf: enable some functions in cgroup programs

From: Matteo Croce <teknoraver@...a.com>

Enable some BPF kfuncs and the helper bpf_current_task_under_cgroup()
for program types BPF_CGROUP_*.
These will be used by systemd-networkd:
https://github.com/systemd/systemd/pull/32212

v5->v6:
Called register_btf_kfunc_id_set() only once
Fixed build error with !CONFIG_CGROUPS

v4->v5:
Same code, but v4 had an old cover letter

v3->v4:
Reset all the acked-by tags because the code changed a bit.

Signed-off-by: Matteo Croce <teknoraver@...a.com>

Matteo Croce (2):
  bpf: enable generic kfuncs for BPF_CGROUP_* programs
  bpf: allow bpf_current_task_under_cgroup() with BPF_CGROUP_*

 include/linux/bpf.h      |  1 +
 kernel/bpf/btf.c         |  8 ++++++--
 kernel/bpf/cgroup.c      |  2 ++
 kernel/bpf/helpers.c     | 24 ++++++++++++++++++++++++
 kernel/trace/bpf_trace.c | 27 ++-------------------------
 5 files changed, 35 insertions(+), 27 deletions(-)

-- 
2.46.0