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[bpf-next,0/2] Introduce a new bpf helper of bpf_task_under_cgroup

Message ID 20230420072657.80324-1-zhoufeng.zf@bytedance.com
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Series Introduce a new bpf helper of bpf_task_under_cgroup | expand

Message

Feng Zhou April 20, 2023, 7:26 a.m. UTC 
From: Feng Zhou <zhoufeng.zf@bytedance.com>

Trace sched related functions, such as enqueue_task_fair, it is necessary to
specify a task instead of the current task which within a given cgroup to a map.

Feng Zhou (2):
  bpf: Add bpf_task_under_cgroup helper
  selftests/bpf: Add testcase for bpf_task_under_cgroup

 include/uapi/linux/bpf.h                      | 13 +++++
 kernel/bpf/verifier.c                         |  4 +-
 kernel/trace/bpf_trace.c                      | 31 ++++++++++++
 tools/include/uapi/linux/bpf.h                | 13 +++++
 .../bpf/prog_tests/task_under_cgroup.c        | 49 +++++++++++++++++++
 .../bpf/progs/test_task_under_cgroup.c        | 31 ++++++++++++
 6 files changed, 140 insertions(+), 1 deletion(-)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/task_under_cgroup.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_task_under_cgroup.c