diff options
Diffstat (limited to 'net/core/filter.c')
| -rw-r--r-- | net/core/filter.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index bb4a196c8809..ac5c1633f8d2 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -5918,6 +5918,35 @@ static const struct bpf_func_proto bpf_tcp_gen_syncookie_proto = { .arg5_type = ARG_CONST_SIZE, }; +BPF_CALL_3(bpf_sk_assign, struct sk_buff *, skb, struct sock *, sk, u64, flags) +{ + if (flags != 0) + return -EINVAL; + if (!skb_at_tc_ingress(skb)) + return -EOPNOTSUPP; + if (unlikely(dev_net(skb->dev) != sock_net(sk))) + return -ENETUNREACH; + if (unlikely(sk->sk_reuseport)) + return -ESOCKTNOSUPPORT; + if (unlikely(!refcount_inc_not_zero(&sk->sk_refcnt))) + return -ENOENT; + + skb_orphan(skb); + skb->sk = sk; + skb->destructor = sock_pfree; + + return 0; +} + +static const struct bpf_func_proto bpf_sk_assign_proto = { + .func = bpf_sk_assign, + .gpl_only = false, + .ret_type = RET_INTEGER, + .arg1_type = ARG_PTR_TO_CTX, + .arg2_type = ARG_PTR_TO_SOCK_COMMON, + .arg3_type = ARG_ANYTHING, +}; + #endif /* CONFIG_INET */ bool bpf_helper_changes_pkt_data(void *func) @@ -6249,6 +6278,8 @@ tc_cls_act_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) return &bpf_skb_ecn_set_ce_proto; case BPF_FUNC_tcp_gen_syncookie: return &bpf_tcp_gen_syncookie_proto; + case BPF_FUNC_sk_assign: + return &bpf_sk_assign_proto; #endif default: return bpf_base_func_proto(func_id); |