bpf: Add bpf_task_under_cgroup() kfunc

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Add a kfunc that's similar to the bpf_current_task_under_cgroup.
The difference is that it is a designated task.

When hook sched related functions, sometimes it is necessary to
specify a task instead of the current task.

Signed-off-by: Feng Zhou <zhoufeng.zf@bytedance.com>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/20230506031545.35991-2-zhoufeng.zf@bytedance.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Feng Zhou 2023-05-06 11:15:44 +08:00 • committed by Alexei Starovoitov

parent f4dea9689c

commit b5ad4cdc46

1 changed files with 17 additions and 0 deletions

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kernel/bpf/helpers.c

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