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ipv6: introduce tcp_v6_iif()
Commit971f10eca1
("tcp: better TCP_SKB_CB layout to reduce cache line misses") added a regression for SO_BINDTODEVICE on IPv6. This is because we still use inet6_iif() which expects that IP6 control block is still at the beginning of skb->cb[] This patch adds tcp_v6_iif() helper and uses it where necessary. Because __inet6_lookup_skb() is used by TCP and DCCP, we add an iif parameter to it. Signed-off-by: Eric Dumazet <edumazet@google.com> Fixes:971f10eca1
("tcp: better TCP_SKB_CB layout to reduce cache line misses") Acked-by: Cong Wang <cwang@twopensource.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
70b33fb0dd
commit
870c315138
5 changed files with 30 additions and 15 deletions
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@ -80,7 +80,8 @@ static inline struct sock *__inet6_lookup(struct net *net,
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static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo,
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struct sk_buff *skb,
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const __be16 sport,
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const __be16 dport)
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const __be16 dport,
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int iif)
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{
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struct sock *sk = skb_steal_sock(skb);
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@ -90,7 +91,7 @@ static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo,
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return __inet6_lookup(dev_net(skb_dst(skb)->dev), hashinfo,
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&ipv6_hdr(skb)->saddr, sport,
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&ipv6_hdr(skb)->daddr, ntohs(dport),
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inet6_iif(skb));
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iif);
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}
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struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo,
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@ -729,6 +729,15 @@ struct tcp_skb_cb {
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#define TCP_SKB_CB(__skb) ((struct tcp_skb_cb *)&((__skb)->cb[0]))
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/* This is the variant of inet6_iif() that must be used by TCP,
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* as TCP moves IP6CB into a different location in skb->cb[]
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*/
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static inline int tcp_v6_iif(const struct sk_buff *skb)
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{
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return TCP_SKB_CB(skb)->header.h6.iif;
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}
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/* Due to TSO, an SKB can be composed of multiple actual
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* packets. To keep these tracked properly, we use this.
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*/
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@ -757,7 +757,8 @@ static int dccp_v6_rcv(struct sk_buff *skb)
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/* Step 2:
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* Look up flow ID in table and get corresponding socket */
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sk = __inet6_lookup_skb(&dccp_hashinfo, skb,
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dh->dccph_sport, dh->dccph_dport);
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dh->dccph_sport, dh->dccph_dport,
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inet6_iif(skb));
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/*
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* Step 2:
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* If no socket ...
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@ -214,7 +214,7 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
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/* So that link locals have meaning */
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if (!sk->sk_bound_dev_if &&
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ipv6_addr_type(&ireq->ir_v6_rmt_addr) & IPV6_ADDR_LINKLOCAL)
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ireq->ir_iif = inet6_iif(skb);
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ireq->ir_iif = tcp_v6_iif(skb);
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ireq->ir_mark = inet_request_mark(sk, skb);
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@ -424,6 +424,7 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
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if (sock_owned_by_user(sk))
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goto out;
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/* Note : We use inet6_iif() here, not tcp_v6_iif() */
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req = inet6_csk_search_req(sk, &prev, th->dest, &hdr->daddr,
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&hdr->saddr, inet6_iif(skb));
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if (!req)
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@ -738,7 +739,7 @@ static void tcp_v6_init_req(struct request_sock *req, struct sock *sk,
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/* So that link locals have meaning */
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if (!sk->sk_bound_dev_if &&
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ipv6_addr_type(&ireq->ir_v6_rmt_addr) & IPV6_ADDR_LINKLOCAL)
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ireq->ir_iif = inet6_iif(skb);
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ireq->ir_iif = tcp_v6_iif(skb);
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if (!TCP_SKB_CB(skb)->tcp_tw_isn &&
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(ipv6_opt_accepted(sk, skb, &TCP_SKB_CB(skb)->header.h6) ||
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@ -860,7 +861,7 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
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fl6.flowi6_proto = IPPROTO_TCP;
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if (rt6_need_strict(&fl6.daddr) && !oif)
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fl6.flowi6_oif = inet6_iif(skb);
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fl6.flowi6_oif = tcp_v6_iif(skb);
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else
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fl6.flowi6_oif = oif;
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fl6.flowi6_mark = IP6_REPLY_MARK(net, skb->mark);
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@ -918,7 +919,7 @@ static void tcp_v6_send_reset(struct sock *sk, struct sk_buff *skb)
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sk1 = inet6_lookup_listener(dev_net(skb_dst(skb)->dev),
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&tcp_hashinfo, &ipv6h->saddr,
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th->source, &ipv6h->daddr,
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ntohs(th->source), inet6_iif(skb));
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ntohs(th->source), tcp_v6_iif(skb));
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if (!sk1)
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return;
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@ -1000,13 +1001,14 @@ static struct sock *tcp_v6_hnd_req(struct sock *sk, struct sk_buff *skb)
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/* Find possible connection requests. */
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req = inet6_csk_search_req(sk, &prev, th->source,
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&ipv6_hdr(skb)->saddr,
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&ipv6_hdr(skb)->daddr, inet6_iif(skb));
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&ipv6_hdr(skb)->daddr, tcp_v6_iif(skb));
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if (req)
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return tcp_check_req(sk, skb, req, prev, false);
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nsk = __inet6_lookup_established(sock_net(sk), &tcp_hashinfo,
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&ipv6_hdr(skb)->saddr, th->source,
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&ipv6_hdr(skb)->daddr, ntohs(th->dest), inet6_iif(skb));
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&ipv6_hdr(skb)->saddr, th->source,
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&ipv6_hdr(skb)->daddr, ntohs(th->dest),
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tcp_v6_iif(skb));
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if (nsk) {
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if (nsk->sk_state != TCP_TIME_WAIT) {
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@ -1090,7 +1092,7 @@ static struct sock *tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
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newnp->ipv6_fl_list = NULL;
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newnp->pktoptions = NULL;
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newnp->opt = NULL;
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newnp->mcast_oif = inet6_iif(skb);
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newnp->mcast_oif = tcp_v6_iif(skb);
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newnp->mcast_hops = ipv6_hdr(skb)->hop_limit;
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newnp->rcv_flowinfo = ip6_flowinfo(ipv6_hdr(skb));
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if (np->repflow)
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@ -1174,7 +1176,7 @@ static struct sock *tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
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skb_set_owner_r(newnp->pktoptions, newsk);
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}
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newnp->opt = NULL;
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newnp->mcast_oif = inet6_iif(skb);
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newnp->mcast_oif = tcp_v6_iif(skb);
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newnp->mcast_hops = ipv6_hdr(skb)->hop_limit;
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newnp->rcv_flowinfo = ip6_flowinfo(ipv6_hdr(skb));
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if (np->repflow)
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@ -1360,7 +1362,7 @@ static int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
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if (TCP_SKB_CB(opt_skb)->end_seq == tp->rcv_nxt &&
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!((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN))) {
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if (np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo)
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np->mcast_oif = inet6_iif(opt_skb);
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np->mcast_oif = tcp_v6_iif(opt_skb);
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if (np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim)
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np->mcast_hops = ipv6_hdr(opt_skb)->hop_limit;
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if (np->rxopt.bits.rxflow || np->rxopt.bits.rxtclass)
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@ -1427,7 +1429,8 @@ static int tcp_v6_rcv(struct sk_buff *skb)
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TCP_SKB_CB(skb)->ip_dsfield = ipv6_get_dsfield(hdr);
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TCP_SKB_CB(skb)->sacked = 0;
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sk = __inet6_lookup_skb(&tcp_hashinfo, skb, th->source, th->dest);
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sk = __inet6_lookup_skb(&tcp_hashinfo, skb, th->source, th->dest,
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tcp_v6_iif(skb));
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if (!sk)
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goto no_tcp_socket;
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@ -1514,7 +1517,7 @@ static int tcp_v6_rcv(struct sk_buff *skb)
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sk2 = inet6_lookup_listener(dev_net(skb->dev), &tcp_hashinfo,
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&ipv6_hdr(skb)->saddr, th->source,
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&ipv6_hdr(skb)->daddr,
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ntohs(th->dest), inet6_iif(skb));
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ntohs(th->dest), tcp_v6_iif(skb));
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if (sk2 != NULL) {
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struct inet_timewait_sock *tw = inet_twsk(sk);
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inet_twsk_deschedule(tw, &tcp_death_row);
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@ -1553,6 +1556,7 @@ static void tcp_v6_early_demux(struct sk_buff *skb)
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if (th->doff < sizeof(struct tcphdr) / 4)
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return;
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/* Note : We use inet6_iif() here, not tcp_v6_iif() */
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sk = __inet6_lookup_established(dev_net(skb->dev), &tcp_hashinfo,
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&hdr->saddr, th->source,
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&hdr->daddr, ntohs(th->dest),
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