You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
41 lines
720 B
41 lines
720 B
4 months ago
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
#include <linux/bpf.h>
|
||
|
|
|
||
|
|
#include "bpf_helpers.h"
|
||
|
|
|
||
|
|
struct {
|
||
|
|
__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
|
||
|
|
__uint(max_entries, 3);
|
||
|
|
__uint(key_size, sizeof(__u32));
|
||
|
|
__uint(value_size, sizeof(__u32));
|
||
|
|
} jmp_table SEC(".maps");
|
||
|
|
|
||
|
|
static volatile int selector;
|
||
|
|
|
||
|
|
#define TAIL_FUNC(x) \
|
||
|
|
SEC("classifier/" #x) \
|
||
|
|
int bpf_func_##x(struct __sk_buff *skb) \
|
||
|
|
{ \
|
||
|
|
return x; \
|
||
|
|
}
|
||
|
|
TAIL_FUNC(0)
|
||
|
|
TAIL_FUNC(1)
|
||
|
|
TAIL_FUNC(2)
|
||
|
|
|
||
|
|
SEC("classifier")
|
||
|
|
int entry(struct __sk_buff *skb)
|
||
|
|
{
|
||
|
|
int idx = 0;
|
||
|
|
|
||
|
|
if (selector == 1234)
|
||
|
|
idx = 1;
|
||
|
|
else if (selector == 5678)
|
||
|
|
idx = 2;
|
||
|
|
|
||
|
|
bpf_tail_call(skb, &jmp_table, idx);
|
||
|
|
return 3;
|
||
|
|
}
|
||
|
|
|
||
|
|
char __license[] SEC("license") = "GPL";
|
||
|
|
int _version SEC("version") = 1;
|