a2c6380b17
Expanding the test coverage from cgroup2 to include cgroup1. The result as follows, Already existing test cases for cgroup2: #48/1 cgrp_local_storage/tp_btf:OK #48/2 cgrp_local_storage/attach_cgroup:OK #48/3 cgrp_local_storage/recursion:OK #48/4 cgrp_local_storage/negative:OK #48/5 cgrp_local_storage/cgroup_iter_sleepable:OK #48/6 cgrp_local_storage/yes_rcu_lock:OK #48/7 cgrp_local_storage/no_rcu_lock:OK Expanded test cases for cgroup1: #48/8 cgrp_local_storage/cgrp1_tp_btf:OK #48/9 cgrp_local_storage/cgrp1_recursion:OK #48/10 cgrp_local_storage/cgrp1_negative:OK #48/11 cgrp_local_storage/cgrp1_iter_sleepable:OK #48/12 cgrp_local_storage/cgrp1_yes_rcu_lock:OK #48/13 cgrp_local_storage/cgrp1_no_rcu_lock:OK Summary: #48 cgrp_local_storage:OK Summary: 1/13 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Yafang Shao <laoar.shao@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20231206115326.4295-4-laoar.shao@gmail.com Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
126 lines
2.6 KiB
C
126 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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char _license[] SEC("license") = "GPL";
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struct {
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__uint(type, BPF_MAP_TYPE_CGRP_STORAGE);
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__uint(map_flags, BPF_F_NO_PREALLOC);
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__type(key, int);
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__type(value, long);
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} map_a SEC(".maps");
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struct {
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__uint(type, BPF_MAP_TYPE_CGRP_STORAGE);
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__uint(map_flags, BPF_F_NO_PREALLOC);
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__type(key, int);
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__type(value, long);
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} map_b SEC(".maps");
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#define MAGIC_VALUE 0xabcd1234
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pid_t target_pid = 0;
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int mismatch_cnt = 0;
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int enter_cnt = 0;
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int exit_cnt = 0;
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int target_hid = 0;
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bool is_cgroup1 = 0;
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struct cgroup *bpf_task_get_cgroup1(struct task_struct *task, int hierarchy_id) __ksym;
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void bpf_cgroup_release(struct cgroup *cgrp) __ksym;
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static void __on_enter(struct pt_regs *regs, long id, struct cgroup *cgrp)
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{
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long *ptr;
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int err;
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/* populate value 0 */
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ptr = bpf_cgrp_storage_get(&map_a, cgrp, 0,
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BPF_LOCAL_STORAGE_GET_F_CREATE);
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if (!ptr)
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return;
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/* delete value 0 */
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err = bpf_cgrp_storage_delete(&map_a, cgrp);
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if (err)
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return;
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/* value is not available */
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ptr = bpf_cgrp_storage_get(&map_a, cgrp, 0, 0);
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if (ptr)
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return;
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/* re-populate the value */
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ptr = bpf_cgrp_storage_get(&map_a, cgrp, 0,
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BPF_LOCAL_STORAGE_GET_F_CREATE);
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if (!ptr)
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return;
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__sync_fetch_and_add(&enter_cnt, 1);
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*ptr = MAGIC_VALUE + enter_cnt;
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}
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SEC("tp_btf/sys_enter")
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int BPF_PROG(on_enter, struct pt_regs *regs, long id)
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{
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struct task_struct *task;
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struct cgroup *cgrp;
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task = bpf_get_current_task_btf();
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if (task->pid != target_pid)
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return 0;
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if (is_cgroup1) {
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cgrp = bpf_task_get_cgroup1(task, target_hid);
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if (!cgrp)
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return 0;
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__on_enter(regs, id, cgrp);
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bpf_cgroup_release(cgrp);
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return 0;
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}
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__on_enter(regs, id, task->cgroups->dfl_cgrp);
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return 0;
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}
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static void __on_exit(struct pt_regs *regs, long id, struct cgroup *cgrp)
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{
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long *ptr;
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ptr = bpf_cgrp_storage_get(&map_a, cgrp, 0,
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BPF_LOCAL_STORAGE_GET_F_CREATE);
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if (!ptr)
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return;
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__sync_fetch_and_add(&exit_cnt, 1);
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if (*ptr != MAGIC_VALUE + exit_cnt)
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__sync_fetch_and_add(&mismatch_cnt, 1);
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}
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SEC("tp_btf/sys_exit")
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int BPF_PROG(on_exit, struct pt_regs *regs, long id)
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{
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struct task_struct *task;
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struct cgroup *cgrp;
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task = bpf_get_current_task_btf();
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if (task->pid != target_pid)
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return 0;
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if (is_cgroup1) {
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cgrp = bpf_task_get_cgroup1(task, target_hid);
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if (!cgrp)
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return 0;
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__on_exit(regs, id, cgrp);
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bpf_cgroup_release(cgrp);
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return 0;
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}
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__on_exit(regs, id, task->cgroups->dfl_cgrp);
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return 0;
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}
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