From: David Vernet <void@manifault.com>
To: bpf@vger.kernel.org
Cc: ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net,
martin.lau@linux.dev, yhs@fb.com, song@kernel.org,
sdf@google.com, john.fastabend@gmail.com, kpsingh@kernel.org,
jolsa@kernel.org, haoluo@google.com, tj@kernel.org,
kernel-team@fb.com, linux-kernel@vger.kernel.org
Subject: [PATCH bpf-next 0/4] Support storing struct cgroup * objects as kptrs
Date: Mon, 21 Nov 2022 23:54:54 -0600 [thread overview]
Message-ID: <20221122055458.173143-1-void@manifault.com> (raw)
In [0], we added support for storing struct task_struct * objects as
kptrs. This patch set extends this effort to also include storing struct
cgroup * object as kptrs.
As with tasks, there are many possible use cases for storing cgroups in
maps. During tracing, for example, it could be useful to query cgroup
statistics such as PSI averages, or tracking which tasks are migrating
to and from the cgroup.
[0]: https://lore.kernel.org/all/20221120051004.3605026-1-void@manifault.com/
David Vernet (4):
bpf: Enable cgroups to be used as kptrs
selftests/bpf: Add cgroup kfunc / kptr selftests
bpf: Add bpf_cgroup_ancestor() kfunc
selftests/bpf: Add selftests for bpf_cgroup_ancestor() kfunc
kernel/bpf/helpers.c | 103 ++++++-
tools/testing/selftests/bpf/DENYLIST.s390x | 1 +
.../selftests/bpf/prog_tests/cgrp_kfunc.c | 175 ++++++++++++
.../selftests/bpf/progs/cgrp_kfunc_common.h | 72 +++++
.../selftests/bpf/progs/cgrp_kfunc_failure.c | 260 ++++++++++++++++++
.../selftests/bpf/progs/cgrp_kfunc_success.c | 170 ++++++++++++
6 files changed, 778 insertions(+), 3 deletions(-)
create mode 100644 tools/testing/selftests/bpf/prog_tests/cgrp_kfunc.c
create mode 100644 tools/testing/selftests/bpf/progs/cgrp_kfunc_common.h
create mode 100644 tools/testing/selftests/bpf/progs/cgrp_kfunc_failure.c
create mode 100644 tools/testing/selftests/bpf/progs/cgrp_kfunc_success.c
--
2.38.1
next reply other threads:[~2022-11-22 5:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-22 5:54 David Vernet [this message]
2022-11-22 5:54 ` [PATCH bpf-next 1/4] bpf: Enable cgroups to be used as kptrs David Vernet
2022-11-22 5:54 ` [PATCH bpf-next 2/4] selftests/bpf: Add cgroup kfunc / kptr selftests David Vernet
2022-11-22 5:54 ` [PATCH bpf-next 3/4] bpf: Add bpf_cgroup_ancestor() kfunc David Vernet
2022-11-22 5:54 ` [PATCH bpf-next 4/4] selftests/bpf: Add selftests for " David Vernet
2022-11-22 22:44 ` [PATCH bpf-next 0/4] Support storing struct cgroup * objects as kptrs Tejun Heo
2022-11-22 23:00 ` patchwork-bot+netdevbpf
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