From: Yonghong Song <yonghong.song@linux.dev>
To: bpf@vger.kernel.org
Cc: Alexei Starovoitov <ast@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
John Fastabend <john.fastabend@gmail.com>,
kernel-team@fb.com, Martin KaFai Lau <martin.lau@kernel.org>,
Yury Namgung <ynamgung@meta.com>
Subject: [PATCH bpf-next 0/5] bpf: Allow helper bpf_get_ns_current_pid_tgid() in cgroup/sk_msg programs
Date: Thu, 7 Mar 2024 15:26:58 -0800 [thread overview]
Message-ID: <20240307232659.1115872-1-yonghong.song@linux.dev> (raw)
Currently bpf_get_current_pid_tgid() is allowed in tracing, cgroup
and sk_msg progs while bpf_get_ns_current_pid_tgid() is only allowed
in tracing progs.
We have an internal use case where for an application running
in a container (with pid namespace), user wants to get
the pid associated with the pid namespace in a cgroup bpf
program. Besides cgroup, the only prog type, supporting
bpf_get_current_pid_tgid() but not bpf_get_ns_current_pid_tgid(),
is sk_msg and this patch set added it as well.
Patch 1 added the kernel support and patches 2-5 added
the test for cgroup and sk_msg.
Yonghong Song (5):
bpf: Allow helper bpf_get_ns_current_pid_tgid() in cgroup and sk_msg
programs
selftests/bpf: Replace CHECK with ASSERT_* in ns_current_pid_tgid test
selftests/bpf: Refactor out some functions in ns_current_pid_tgid test
selftests/bpf: Add a cgroup prog bpf_get_ns_current_pid_tgid() test
selftests/bpf: Add a sk_msg prog bpf_get_ns_current_pid_tgid() test
kernel/bpf/cgroup.c | 2 +
net/core/filter.c | 2 +
.../bpf/prog_tests/ns_current_pid_tgid.c | 195 +++++++++++++++---
.../bpf/progs/test_ns_current_pid_tgid.c | 31 ++-
4 files changed, 196 insertions(+), 34 deletions(-)
--
2.43.0
next reply other threads:[~2024-03-07 23:27 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-07 23:26 Yonghong Song [this message]
2024-03-07 23:27 ` [PATCH bpf-next 1/5] bpf: Allow helper bpf_get_ns_current_pid_tgid() in cgroup and sk_msg programs Yonghong Song
2024-03-09 1:06 ` Andrii Nakryiko
2024-03-09 18:39 ` Yonghong Song
2024-03-09 19:10 ` Alexei Starovoitov
2024-03-09 21:03 ` Yonghong Song
2024-03-07 23:27 ` [PATCH bpf-next 2/5] selftests/bpf: Replace CHECK with ASSERT_* in ns_current_pid_tgid test Yonghong Song
2024-03-07 23:27 ` [PATCH bpf-next 3/5] selftests/bpf: Refactor out some functions " Yonghong Song
2024-03-07 23:27 ` [PATCH bpf-next 4/5] selftests/bpf: Add a cgroup prog bpf_get_ns_current_pid_tgid() test Yonghong Song
2024-03-08 19:08 ` Martin KaFai Lau
2024-03-09 0:04 ` Yonghong Song
2024-03-07 23:27 ` [PATCH bpf-next 5/5] selftests/bpf: Add a sk_msg " Yonghong Song
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