mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
81374aaa26
When attaching a program to sockmap we need to check map type
is correct.
Fixes: 174a79ff95 ("bpf: sockmap with sk redirect support")
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
69 lines
1.4 KiB
C
69 lines
1.4 KiB
C
#include <linux/bpf.h>
|
|
#include "bpf_helpers.h"
|
|
#include "bpf_util.h"
|
|
#include "bpf_endian.h"
|
|
|
|
int _version SEC("version") = 1;
|
|
|
|
#define bpf_printk(fmt, ...) \
|
|
({ \
|
|
char ____fmt[] = fmt; \
|
|
bpf_trace_printk(____fmt, sizeof(____fmt), \
|
|
##__VA_ARGS__); \
|
|
})
|
|
|
|
struct bpf_map_def SEC("maps") sock_map_rx = {
|
|
.type = BPF_MAP_TYPE_SOCKMAP,
|
|
.key_size = sizeof(int),
|
|
.value_size = sizeof(int),
|
|
.max_entries = 20,
|
|
};
|
|
|
|
struct bpf_map_def SEC("maps") sock_map_tx = {
|
|
.type = BPF_MAP_TYPE_SOCKMAP,
|
|
.key_size = sizeof(int),
|
|
.value_size = sizeof(int),
|
|
.max_entries = 20,
|
|
};
|
|
|
|
struct bpf_map_def SEC("maps") sock_map_break = {
|
|
.type = BPF_MAP_TYPE_ARRAY,
|
|
.key_size = sizeof(int),
|
|
.value_size = sizeof(int),
|
|
.max_entries = 20,
|
|
};
|
|
|
|
SEC("sk_skb2")
|
|
int bpf_prog2(struct __sk_buff *skb)
|
|
{
|
|
void *data_end = (void *)(long) skb->data_end;
|
|
void *data = (void *)(long) skb->data;
|
|
__u32 lport = skb->local_port;
|
|
__u32 rport = skb->remote_port;
|
|
__u8 *d = data;
|
|
__u8 sk, map;
|
|
|
|
if (data + 8 > data_end)
|
|
return SK_DROP;
|
|
|
|
map = d[0];
|
|
sk = d[1];
|
|
|
|
d[0] = 0xd;
|
|
d[1] = 0xe;
|
|
d[2] = 0xa;
|
|
d[3] = 0xd;
|
|
d[4] = 0xb;
|
|
d[5] = 0xe;
|
|
d[6] = 0xe;
|
|
d[7] = 0xf;
|
|
|
|
bpf_printk("verdict: data[0] = redir(%u:%u)\n", map, sk);
|
|
|
|
if (!map)
|
|
return bpf_sk_redirect_map(&sock_map_rx, sk, 0);
|
|
return bpf_sk_redirect_map(&sock_map_tx, sk, 0);
|
|
}
|
|
|
|
char _license[] SEC("license") = "GPL";
|