From: Tejun Heo <tj@kernel.org>
To: Yafang Shao <laoar.shao@gmail.com>
Cc: ast@kernel.org, daniel@iogearbox.net, john.fastabend@gmail.com,
andrii@kernel.org, martin.lau@linux.dev, song@kernel.org,
yonghong.song@linux.dev, kpsingh@kernel.org, sdf@google.com,
haoluo@google.com, jolsa@kernel.org, lizefan.x@bytedance.com,
hannes@cmpxchg.org, yosryahmed@google.com, mkoutny@suse.com,
sinquersw@gmail.com, cgroups@vger.kernel.org,
bpf@vger.kernel.org
Subject: Re: [RFC PATCH bpf-next 3/8] bpf: Add kfuncs for cgroup1 hierarchy
Date: Sat, 7 Oct 2023 05:57:52 -1000 [thread overview]
Message-ID: <ZSGAACHHNAYbk34i@slm.duckdns.org> (raw)
In-Reply-To: <20231007140304.4390-4-laoar.shao@gmail.com>
On Sat, Oct 07, 2023 at 02:02:59PM +0000, Yafang Shao wrote:
> +
> +/**
> + * bpf_task_cgroup_id_within_hierarchy - Retrieves the associated cgroup ID of a
> + * task within a specific cgroup1 hierarchy.
> + * @task: The target task
> + * @hierarchy_id: The ID of a cgroup1 hierarchy
> + */
> +__bpf_kfunc u64 bpf_task_cgroup1_id_within_hierarchy(struct task_struct *task, int hierarchy_id)
> +{
> + return task_cgroup1_id_within_hierarchy(task, hierarchy_id);
> +}
> +
> +/**
> + * bpf_task_ancestor_cgroup_id_within_hierarchy - Retrieves the associated
> + * ancestor cgroup ID of a task within a specific cgroup1 hierarchy.
> + * @task: The target task
> + * @hierarchy_id: The ID of a cgroup1 hierarchy
> + * @ancestor_level: The cgroup level of the ancestor in the cgroup1 hierarchy
> + */
> +__bpf_kfunc u64 bpf_task_ancestor_cgroup1_id_within_hierarchy(struct task_struct *task,
> + int hierarchy_id, int ancestor_level)
> +{
> + return task_ancestor_cgroup1_id_within_hierarchy(task, hierarchy_id, ancestor_level);
> +}
The same here. Please make one helper that returns a kptr and then let the
user call bpf_cgroup_ancestor() if desired.
Thanks.
--
tejun
next prev parent reply other threads:[~2023-10-07 15:57 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-07 14:02 [RFC PATCH bpf-next 0/8] bpf, cgroup: Add BPF support for cgroup1 hierarchy Yafang Shao
2023-10-07 14:02 ` [RFC PATCH bpf-next 1/8] cgroup: Don't have to hold cgroup_mutex in task_cgroup_from_root() Yafang Shao
2023-10-07 15:50 ` Tejun Heo
2023-10-08 2:32 ` Yafang Shao
2023-10-09 14:45 ` Michal Koutný
2023-10-10 3:58 ` Yafang Shao
2023-10-10 8:29 ` Michal Koutný
2023-10-10 11:58 ` Yafang Shao
2023-10-07 14:02 ` [RFC PATCH bpf-next 2/8] cgroup: Add new helpers for cgroup1 hierarchy Yafang Shao
2023-10-07 15:55 ` Tejun Heo
2023-10-08 2:36 ` Yafang Shao
2023-10-09 11:32 ` Michal Koutný
2023-10-09 13:10 ` Yafang Shao
2023-10-09 14:48 ` Michal Koutný
2023-10-10 3:59 ` Yafang Shao
2023-10-07 14:02 ` [RFC PATCH bpf-next 3/8] bpf: Add kfuncs " Yafang Shao
2023-10-07 15:57 ` Tejun Heo [this message]
2023-10-08 2:37 ` Yafang Shao
2023-10-07 14:03 ` [RFC PATCH bpf-next 4/8] selftests/bpf: Fix issues in setup_classid_environment() Yafang Shao
2023-10-07 14:03 ` [RFC PATCH bpf-next 5/8] selftests/bpf: Add parallel support for classid Yafang Shao
2023-10-07 14:03 ` [RFC PATCH bpf-next 6/8] selftests/bpf: Add a new cgroup helper get_classid_cgroup_id() Yafang Shao
2023-10-07 14:03 ` [RFC PATCH bpf-next 7/8] selftests/bpf: Add a new cgroup helper get_cgroup_hierarchy_id() Yafang Shao
2023-10-07 14:03 ` [RFC PATCH bpf-next 8/8] selftests/bpf: Add selftests for cgroup1 hierarchy Yafang Shao
2023-10-09 11:46 ` [RFC PATCH bpf-next 0/8] bpf, cgroup: Add BPF support " Michal Koutný
2023-10-09 13:11 ` Yafang Shao
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