37 lines
838 B
C
37 lines
838 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <vmlinux.h>
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#include <bpf/bpf_tracing.h>
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#include <bpf/bpf_helpers.h>
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struct task_ls_map {
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__uint(type, BPF_MAP_TYPE_TASK_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, int);
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} task_ls_map SEC(".maps");
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long gp_seq;
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SEC("syscall")
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int do_call_rcu_tasks_trace(void *ctx)
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{
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struct task_struct *current;
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int *v;
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current = bpf_get_current_task_btf();
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v = bpf_task_storage_get(&task_ls_map, current, NULL, BPF_LOCAL_STORAGE_GET_F_CREATE);
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if (!v)
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return 1;
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/* Invoke call_rcu_tasks_trace */
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return bpf_task_storage_delete(&task_ls_map, current);
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}
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SEC("kprobe/rcu_tasks_trace_postgp")
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int rcu_tasks_trace_postgp(void *ctx)
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{
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__sync_add_and_fetch(&gp_seq, 1);
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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