Hi, The patchset aims to relax the allowlist for open-coded css_task iter suggested by Alexei[1]. Please see individual patches for more details. And comments are always welcome. Patch summary: * Patch #1: Relax the allowlist and let css_task iter can be used in bpf iters and any sleepable progs. * Patch #2: Add a test in cgroup_iters.c which demonstrates how css_task iters can be combined with cgroup iter. link[1]:https://lore.kernel.org/lkml/CAADnVQKafk_junRyE=-FVAik4hjTRDtThymYGEL8hGTuYoOGpA@xxxxxxxxxxxxxx/ --- Changes in v2: * Fix the incorrect logic in check_css_task_iter_allowlist. Use expected_attach_type to check whether we are using bpf_iters. * Link to v1:https://lore.kernel.org/bpf/20231022154527.229117-1-zhouchuyi@xxxxxxxxxxxxx/T/#m946f9cde86b44a13265d9a44c5738a711eb578fd --- Chuyi Zhou (2): bpf: Relax allowlist for css_task iter selftests/bpf: Add test for css_task iter combining with cgroup iter kernel/bpf/verifier.c | 21 ++++++---- .../selftests/bpf/prog_tests/cgroup_iter.c | 33 +++++++++++++++ .../selftests/bpf/progs/iters_css_task.c | 41 +++++++++++++++++++ .../selftests/bpf/progs/iters_task_failure.c | 4 +- 4 files changed, 89 insertions(+), 10 deletions(-) -- 2.20.1
