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# fe0dd9d4 24-Aug-2022 Hao Luo <haoluo@google.com>

selftests/bpf: Test cgroup_iter.

Add a selftest for cgroup_iter. The selftest creates a mini cgroup tree
of the following structure:

ROOT (working cgroup)
|
PARENT
/ \
CHILD1 CH

selftests/bpf: Test cgroup_iter.

Add a selftest for cgroup_iter. The selftest creates a mini cgroup tree
of the following structure:

ROOT (working cgroup)
|
PARENT
/ \
CHILD1 CHILD2

and tests the following scenarios:

- invalid cgroup fd.
- pre-order walk over descendants from PARENT.
- post-order walk over descendants from PARENT.
- walk of ancestors from PARENT.
- process only a single object (i.e. PARENT).
- early termination.

Acked-by: Yonghong Song <yhs@fb.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Hao Luo <haoluo@google.com>
Link: https://lore.kernel.org/r/20220824233117.1312810-3-haoluo@google.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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