44cb03f19b
The result is as follows: $ tools/testing/selftests/bpf/test_progs --name=task_under_cgroup #237 task_under_cgroup:OK Summary: 1/0 PASSED, 0 SKIPPED, 0 FAILED Without the previous patch, there will be RCU warnings in dmesg when CONFIG_PROVE_RCU is enabled. While with the previous patch, there will be no warnings. Signed-off-by: Yafang Shao <laoar.shao@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Stanislav Fomichev <sdf@google.com> Link: https://lore.kernel.org/bpf/20231007135945.4306-2-laoar.shao@gmail.com
60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2023 Bytedance */
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#include <sys/syscall.h>
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#include <test_progs.h>
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#include <cgroup_helpers.h>
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#include "test_task_under_cgroup.skel.h"
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#define FOO "/foo"
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void test_task_under_cgroup(void)
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{
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struct test_task_under_cgroup *skel;
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int ret, foo;
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pid_t pid;
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foo = test__join_cgroup(FOO);
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if (!ASSERT_OK(foo < 0, "cgroup_join_foo"))
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return;
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skel = test_task_under_cgroup__open();
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if (!ASSERT_OK_PTR(skel, "test_task_under_cgroup__open"))
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goto cleanup;
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skel->rodata->local_pid = getpid();
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skel->bss->remote_pid = getpid();
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skel->rodata->cgid = get_cgroup_id(FOO);
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ret = test_task_under_cgroup__load(skel);
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if (!ASSERT_OK(ret, "test_task_under_cgroup__load"))
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goto cleanup;
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/* First, attach the LSM program, and then it will be triggered when the
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* TP_BTF program is attached.
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*/
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skel->links.lsm_run = bpf_program__attach_lsm(skel->progs.lsm_run);
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if (!ASSERT_OK_PTR(skel->links.lsm_run, "attach_lsm"))
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goto cleanup;
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skel->links.tp_btf_run = bpf_program__attach_trace(skel->progs.tp_btf_run);
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if (!ASSERT_OK_PTR(skel->links.tp_btf_run, "attach_tp_btf"))
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goto cleanup;
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pid = fork();
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if (pid == 0)
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exit(0);
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ret = (pid == -1);
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if (ASSERT_OK(ret, "fork process"))
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wait(NULL);
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test_task_under_cgroup__detach(skel);
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ASSERT_NEQ(skel->bss->remote_pid, skel->rodata->local_pid,
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"test task_under_cgroup");
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cleanup:
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test_task_under_cgroup__destroy(skel);
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close(foo);
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}
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