From: Yafang Shao <laoar.shao@gmail.com>
To: 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, tj@kernel.org,
lizefan.x@bytedance.com, hannes@cmpxchg.org,
yosryahmed@google.com, mkoutny@suse.com, sinquersw@gmail.com
Cc: cgroups@vger.kernel.org, bpf@vger.kernel.org,
Yafang Shao <laoar.shao@gmail.com>
Subject: [RFC PATCH bpf-next v2 9/9] selftests/bpf: Add selftests for cgroup1 hierarchy
Date: Tue, 17 Oct 2023 12:45:46 +0000 [thread overview]
Message-ID: <20231017124546.24608-10-laoar.shao@gmail.com> (raw)
In-Reply-To: <20231017124546.24608-1-laoar.shao@gmail.com>
Add selftests for cgroup1 hierarchy.
The result as follows,
$ tools/testing/selftests/bpf/test_progs --name=cgroup1_hierarchy
#36/1 cgroup1_hierarchy/test_cgroup1_hierarchy:OK
#36/2 cgroup1_hierarchy/test_root_cgid:OK
#36/3 cgroup1_hierarchy/test_invalid_level:OK
#36/4 cgroup1_hierarchy/test_invalid_cgid:OK
#36/5 cgroup1_hierarchy/test_invalid_hid:OK
#36/6 cgroup1_hierarchy/test_invalid_cgrp_name:OK
#36/7 cgroup1_hierarchy/test_invalid_cgrp_name2:OK
#36/8 cgroup1_hierarchy/test_sleepable_prog:OK
#36 cgroup1_hierarchy:OK
Summary: 1/8 PASSED, 0 SKIPPED, 0 FAILED
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
---
.../bpf/prog_tests/cgroup1_hierarchy.c | 159 ++++++++++++++++++
.../bpf/progs/test_cgroup1_hierarchy.c | 73 ++++++++
2 files changed, 232 insertions(+)
create mode 100644 tools/testing/selftests/bpf/prog_tests/cgroup1_hierarchy.c
create mode 100644 tools/testing/selftests/bpf/progs/test_cgroup1_hierarchy.c
diff --git a/tools/testing/selftests/bpf/prog_tests/cgroup1_hierarchy.c b/tools/testing/selftests/bpf/prog_tests/cgroup1_hierarchy.c
new file mode 100644
index 000000000000..4aafbc921254
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/cgroup1_hierarchy.c
@@ -0,0 +1,159 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2023 Yafang Shao <laoar.shao@gmail.com> */
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <test_progs.h>
+#include "cgroup_helpers.h"
+#include "test_cgroup1_hierarchy.skel.h"
+
+static void bpf_cgroup1(struct test_cgroup1_hierarchy *skel)
+{
+ int err;
+
+ /* Attach LSM prog first */
+ skel->links.lsm_run = bpf_program__attach_lsm(skel->progs.lsm_run);
+ if (!ASSERT_OK_PTR(skel->links.lsm_run, "lsm_attach"))
+ return;
+
+ /* LSM prog will be triggered when attaching fentry */
+ skel->links.fentry_run = bpf_program__attach_trace(skel->progs.fentry_run);
+ ASSERT_NULL(skel->links.fentry_run, "fentry_attach_fail");
+
+ err = bpf_link__destroy(skel->links.lsm_run);
+ ASSERT_OK(err, "destroy_lsm");
+ skel->links.lsm_run = NULL;
+}
+
+static void bpf_cgroup1_sleepable(struct test_cgroup1_hierarchy *skel)
+{
+ int err;
+
+ /* Attach LSM prog first */
+ skel->links.lsm_s_run = bpf_program__attach_lsm(skel->progs.lsm_s_run);
+ if (!ASSERT_OK_PTR(skel->links.lsm_s_run, "lsm_attach"))
+ return;
+
+ /* LSM prog will be triggered when attaching fentry */
+ skel->links.fentry_run = bpf_program__attach_trace(skel->progs.fentry_run);
+ ASSERT_NULL(skel->links.fentry_run, "fentry_attach_fail");
+
+ err = bpf_link__destroy(skel->links.lsm_s_run);
+ ASSERT_OK(err, "destroy_lsm");
+ skel->links.lsm_s_run = NULL;
+}
+
+static void bpf_cgroup1_invalid_id(struct test_cgroup1_hierarchy *skel)
+{
+ int err;
+
+ /* Attach LSM prog first */
+ skel->links.lsm_run = bpf_program__attach_lsm(skel->progs.lsm_run);
+ if (!ASSERT_OK_PTR(skel->links.lsm_run, "lsm_attach"))
+ return;
+
+ /* LSM prog will be triggered when attaching fentry */
+ skel->links.fentry_run = bpf_program__attach_trace(skel->progs.fentry_run);
+ if (!ASSERT_OK_PTR(skel->links.fentry_run, "fentry_attach_success"))
+ goto cleanup;
+
+ err = bpf_link__destroy(skel->links.lsm_run);
+ ASSERT_OK(err, "destroy_lsm");
+ skel->links.lsm_run = NULL;
+
+cleanup:
+ err = bpf_link__destroy(skel->links.fentry_run);
+ ASSERT_OK(err, "destroy_fentry");
+ skel->links.fentry_run = NULL;
+}
+
+void test_cgroup1_hierarchy(void)
+{
+ struct test_cgroup1_hierarchy *skel;
+ __u64 current_cgid;
+ int hid, err;
+
+ skel = test_cgroup1_hierarchy__open();
+ if (!ASSERT_OK_PTR(skel, "open"))
+ return;
+
+ skel->bss->target_pid = getpid();
+
+ err = bpf_program__set_attach_target(skel->progs.fentry_run, 0, "bpf_fentry_test1");
+ if (!ASSERT_OK(err, "fentry_set_target"))
+ goto destroy;
+
+ err = test_cgroup1_hierarchy__load(skel);
+ if (!ASSERT_OK(err, "load"))
+ goto destroy;
+
+ /* Setup cgroup1 hierarchy */
+ err = setup_classid_environment();
+ if (!ASSERT_OK(err, "setup_classid_environment"))
+ goto destroy;
+
+ err = join_classid();
+ if (!ASSERT_OK(err, "join_cgroup1"))
+ goto cleanup;
+
+ current_cgid = get_classid_cgroup_id();
+ if (!ASSERT_GE(current_cgid, 0, "cgroup1 id"))
+ goto cleanup;
+
+ hid = get_cgroup1_hierarchy_id("net_cls");
+ if (!ASSERT_GE(hid, 0, "cgroup1 id"))
+ goto cleanup;
+ skel->bss->target_hid = hid;
+
+ if (test__start_subtest("test_cgroup1_hierarchy")) {
+ skel->bss->target_ancestor_cgid = current_cgid;
+ bpf_cgroup1(skel);
+ }
+
+ if (test__start_subtest("test_root_cgid")) {
+ skel->bss->target_ancestor_cgid = 1;
+ skel->bss->target_ancestor_level = 0;
+ bpf_cgroup1(skel);
+ }
+
+ if (test__start_subtest("test_invalid_level")) {
+ skel->bss->target_ancestor_cgid = 1;
+ skel->bss->target_ancestor_level = 1;
+ bpf_cgroup1_invalid_id(skel);
+ }
+
+ if (test__start_subtest("test_invalid_cgid")) {
+ skel->bss->target_ancestor_cgid = 0;
+ bpf_cgroup1_invalid_id(skel);
+ }
+
+ if (test__start_subtest("test_invalid_hid")) {
+ skel->bss->target_ancestor_cgid = 1;
+ skel->bss->target_ancestor_level = 0;
+ skel->bss->target_hid = -1;
+ bpf_cgroup1_invalid_id(skel);
+ }
+
+ if (test__start_subtest("test_invalid_cgrp_name")) {
+ skel->bss->target_hid = get_cgroup1_hierarchy_id("net_cl");
+ skel->bss->target_ancestor_cgid = current_cgid;
+ bpf_cgroup1_invalid_id(skel);
+ }
+
+ if (test__start_subtest("test_invalid_cgrp_name2")) {
+ skel->bss->target_hid = get_cgroup1_hierarchy_id("net_cls,");
+ skel->bss->target_ancestor_cgid = current_cgid;
+ bpf_cgroup1_invalid_id(skel);
+ }
+
+ if (test__start_subtest("test_sleepable_prog")) {
+ skel->bss->target_hid = hid;
+ skel->bss->target_ancestor_cgid = current_cgid;
+ bpf_cgroup1_sleepable(skel);
+ }
+
+cleanup:
+ cleanup_classid_environment();
+destroy:
+ test_cgroup1_hierarchy__destroy(skel);
+}
diff --git a/tools/testing/selftests/bpf/progs/test_cgroup1_hierarchy.c b/tools/testing/selftests/bpf/progs/test_cgroup1_hierarchy.c
new file mode 100644
index 000000000000..ca9a631a6499
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/test_cgroup1_hierarchy.c
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0
+//#endif
+/* Copyright (C) 2023 Yafang Shao <laoar.shao@gmail.com> */
+
+#include "vmlinux.h"
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+#include <bpf/bpf_core_read.h>
+
+__u32 target_ancestor_level;
+__u64 target_ancestor_cgid;
+int target_pid, target_hid;
+
+struct cgroup *
+bpf_task_get_cgroup1_within_hierarchy(struct task_struct *task, int hierarchy_id) __ksym;
+struct cgroup *bpf_cgroup_ancestor(struct cgroup *cgrp, int level) __ksym;
+void bpf_cgroup_release(struct cgroup *cgrp) __ksym;
+
+static int bpf_link_create_verify(int cmd)
+{
+ struct cgroup *cgrp, *ancestor;
+ struct task_struct *task;
+ int ret = 0;
+
+ if (cmd != BPF_LINK_CREATE)
+ return 0;
+
+ task = bpf_get_current_task_btf();
+
+ /* Then it can run in parallel with others */
+ if (task->pid != target_pid)
+ return 0;
+
+ cgrp = bpf_task_get_cgroup1_within_hierarchy(task, target_hid);
+ if (!cgrp)
+ return 0;
+
+ /* Refuse it if its cgid or its ancestor's cgid is the target cgid */
+ if (cgrp->kn->id == target_ancestor_cgid)
+ ret = -1;
+
+ ancestor = bpf_cgroup_ancestor(cgrp, target_ancestor_level);
+ if (!ancestor)
+ goto out;
+
+ if (ancestor->kn->id == target_ancestor_cgid)
+ ret = -1;
+ bpf_cgroup_release(ancestor);
+
+out:
+ bpf_cgroup_release(cgrp);
+ return ret;
+}
+
+SEC("lsm/bpf")
+int BPF_PROG(lsm_run, int cmd, union bpf_attr *attr, unsigned int size)
+{
+ return bpf_link_create_verify(cmd);
+}
+
+SEC("lsm.s/bpf")
+int BPF_PROG(lsm_s_run, int cmd, union bpf_attr *attr, unsigned int size)
+{
+ return bpf_link_create_verify(cmd);
+}
+
+SEC("fentry")
+int BPF_PROG(fentry_run)
+{
+ return 0;
+}
+
+char _license[] SEC("license") = "GPL";
--
2.30.1 (Apple Git-130)
prev parent reply other threads:[~2023-10-17 12:46 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-17 12:45 [RFC PATCH bpf-next v2 0/9] bpf, cgroup: Add BPF support for cgroup1 hierarchy Yafang Shao
2023-10-17 12:45 ` [RFC PATCH bpf-next v2 1/9] cgroup: Make operations on the cgroup root_list RCU safe Yafang Shao
2023-10-17 13:20 ` Michal Koutný
2023-10-18 2:51 ` Yafang Shao
2023-10-18 9:35 ` Tejun Heo
2023-10-19 6:38 ` Yafang Shao
2023-10-19 19:08 ` Tejun Heo
2023-10-19 19:43 ` Waiman Long
2023-10-20 9:36 ` Yafang Shao
2023-10-20 17:51 ` Tejun Heo
2023-10-22 9:32 ` Yafang Shao
2023-10-25 8:06 ` kernel test robot
2023-10-17 12:45 ` [RFC PATCH bpf-next v2 2/9] cgroup: Eliminate the need for cgroup_mutex in proc_cgroup_show() Yafang Shao
2023-10-17 14:04 ` Michal Koutný
2023-10-18 3:12 ` Yafang Shao
2023-10-18 9:38 ` Tejun Heo
2023-10-19 6:39 ` Yafang Shao
2023-10-17 12:45 ` [RFC PATCH bpf-next v2 3/9] cgroup: Add a new helper for cgroup1 hierarchy Yafang Shao
2023-10-18 9:44 ` Tejun Heo
2023-10-19 6:41 ` Yafang Shao
2023-10-17 12:45 ` [RFC PATCH bpf-next v2 4/9] bpf: Add a new kfunc " Yafang Shao
2023-10-18 9:40 ` Tejun Heo
2023-10-19 6:40 ` Yafang Shao
2023-10-17 12:45 ` [RFC PATCH bpf-next v2 5/9] selftests/bpf: Fix issues in setup_classid_environment() Yafang Shao
2023-10-17 12:45 ` [RFC PATCH bpf-next v2 6/9] selftests/bpf: Add parallel support for classid Yafang Shao
2023-10-17 12:45 ` [RFC PATCH bpf-next v2 7/9] selftests/bpf: Add a new cgroup helper get_classid_cgroup_id() Yafang Shao
2023-10-17 12:45 ` [RFC PATCH bpf-next v2 8/9] selftests/bpf: Add a new cgroup helper get_cgroup_hierarchy_id() Yafang Shao
2023-10-17 12:45 ` Yafang Shao [this message]
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