88 lines
1.6 KiB
C
88 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/bpf.h>
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#include <time.h>
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#include <errno.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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#include "bpf_misc.h"
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char _license[] SEC("license") = "GPL";
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struct elem {
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struct bpf_timer t;
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};
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struct {
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__uint(type, BPF_MAP_TYPE_ARRAY);
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__uint(max_entries, 1);
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__type(key, int);
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__type(value, struct elem);
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} timer1_map SEC(".maps");
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struct {
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__uint(type, BPF_MAP_TYPE_ARRAY);
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__uint(max_entries, 1);
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__type(key, int);
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__type(value, struct elem);
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} timer2_map SEC(".maps");
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int timer1_err;
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int timer2_err;
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static int timer_cb1(void *map, int *k, struct elem *v)
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{
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struct bpf_timer *timer;
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int key = 0;
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timer = bpf_map_lookup_elem(&timer2_map, &key);
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if (timer)
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timer2_err = bpf_timer_cancel(timer);
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return 0;
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}
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static int timer_cb2(void *map, int *k, struct elem *v)
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{
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struct bpf_timer *timer;
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int key = 0;
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timer = bpf_map_lookup_elem(&timer1_map, &key);
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if (timer)
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timer1_err = bpf_timer_cancel(timer);
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return 0;
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}
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SEC("tc")
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int timer1_prog(void *ctx)
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{
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struct bpf_timer *timer;
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int key = 0;
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timer = bpf_map_lookup_elem(&timer1_map, &key);
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if (timer) {
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bpf_timer_init(timer, &timer1_map, CLOCK_BOOTTIME);
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bpf_timer_set_callback(timer, timer_cb1);
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bpf_timer_start(timer, 1, BPF_F_TIMER_CPU_PIN);
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}
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return 0;
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}
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SEC("tc")
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int timer2_prog(void *ctx)
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{
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struct bpf_timer *timer;
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int key = 0;
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timer = bpf_map_lookup_elem(&timer2_map, &key);
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if (timer) {
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bpf_timer_init(timer, &timer2_map, CLOCK_BOOTTIME);
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bpf_timer_set_callback(timer, timer_cb2);
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bpf_timer_start(timer, 1, BPF_F_TIMER_CPU_PIN);
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}
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return 0;
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}
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