ipv6: pull cork initialization into its own function.
Pull IPv6 cork initialization into its own function that can be re-used. IPv6 specific cork data did not have an explicit data structure. This patch creats eone so that just ipv6 cork data can be as arguemts. Also, since IPv6 tries to save the flow label into inet_cork_full tructure, pass the full cork. Adjust ip6_cork_release() to take cork data structures. Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>wifi-calibration
Vlad Yasevich
David S. Miller
parent
ba0c39cb98
commit
366e41d977
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@ -125,6 +125,12 @@ struct ipv6_mc_socklist;
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struct ipv6_ac_socklist;
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struct ipv6_fl_socklist;
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struct inet6_cork {
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struct ipv6_txoptions *opt;
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u8 hop_limit;
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u8 tclass;
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};
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/**
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* struct ipv6_pinfo - ipv6 private area
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*
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@ -217,11 +223,7 @@ struct ipv6_pinfo {
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struct ipv6_txoptions *opt;
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struct sk_buff *pktoptions;
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struct sk_buff *rxpmtu;
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struct {
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struct ipv6_txoptions *opt;
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u8 hop_limit;
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u8 tclass;
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} cork;
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struct inet6_cork cork;
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};
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/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
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@ -1135,6 +1135,74 @@ static void ip6_append_data_mtu(unsigned int *mtu,
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}
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}
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static int ip6_setup_cork(struct sock *sk, struct inet_cork_full *cork,
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struct inet6_cork *v6_cork,
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int hlimit, int tclass, struct ipv6_txoptions *opt,
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struct rt6_info *rt, struct flowi6 *fl6)
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{
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struct ipv6_pinfo *np = inet6_sk(sk);
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unsigned int mtu;
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/*
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* setup for corking
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*/
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if (opt) {
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if (WARN_ON(v6_cork->opt))
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return -EINVAL;
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v6_cork->opt = kzalloc(opt->tot_len, sk->sk_allocation);
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if (unlikely(v6_cork->opt == NULL))
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return -ENOBUFS;
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v6_cork->opt->tot_len = opt->tot_len;
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v6_cork->opt->opt_flen = opt->opt_flen;
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v6_cork->opt->opt_nflen = opt->opt_nflen;
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v6_cork->opt->dst0opt = ip6_opt_dup(opt->dst0opt,
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sk->sk_allocation);
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if (opt->dst0opt && !v6_cork->opt->dst0opt)
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return -ENOBUFS;
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v6_cork->opt->dst1opt = ip6_opt_dup(opt->dst1opt,
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sk->sk_allocation);
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if (opt->dst1opt && !v6_cork->opt->dst1opt)
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return -ENOBUFS;
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v6_cork->opt->hopopt = ip6_opt_dup(opt->hopopt,
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sk->sk_allocation);
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if (opt->hopopt && !v6_cork->opt->hopopt)
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return -ENOBUFS;
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v6_cork->opt->srcrt = ip6_rthdr_dup(opt->srcrt,
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sk->sk_allocation);
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if (opt->srcrt && !v6_cork->opt->srcrt)
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return -ENOBUFS;
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/* need source address above miyazawa*/
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}
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dst_hold(&rt->dst);
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cork->base.dst = &rt->dst;
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cork->fl.u.ip6 = *fl6;
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v6_cork->hop_limit = hlimit;
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v6_cork->tclass = tclass;
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if (rt->dst.flags & DST_XFRM_TUNNEL)
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mtu = np->pmtudisc >= IPV6_PMTUDISC_PROBE ?
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rt->dst.dev->mtu : dst_mtu(&rt->dst);
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else
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mtu = np->pmtudisc >= IPV6_PMTUDISC_PROBE ?
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rt->dst.dev->mtu : dst_mtu(rt->dst.path);
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if (np->frag_size < mtu) {
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if (np->frag_size)
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mtu = np->frag_size;
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}
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cork->base.fragsize = mtu;
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if (dst_allfrag(rt->dst.path))
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cork->base.flags |= IPCORK_ALLFRAG;
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cork->base.length = 0;
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return 0;
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}
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int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
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int offset, int len, int odd, struct sk_buff *skb),
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void *from, int length, int transhdrlen,
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@ -1162,59 +1230,10 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
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/*
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* setup for corking
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*/
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if (opt) {
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if (WARN_ON(np->cork.opt))
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return -EINVAL;
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np->cork.opt = kzalloc(opt->tot_len, sk->sk_allocation);
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if (unlikely(np->cork.opt == NULL))
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return -ENOBUFS;
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np->cork.opt->tot_len = opt->tot_len;
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np->cork.opt->opt_flen = opt->opt_flen;
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np->cork.opt->opt_nflen = opt->opt_nflen;
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np->cork.opt->dst0opt = ip6_opt_dup(opt->dst0opt,
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sk->sk_allocation);
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if (opt->dst0opt && !np->cork.opt->dst0opt)
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return -ENOBUFS;
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np->cork.opt->dst1opt = ip6_opt_dup(opt->dst1opt,
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sk->sk_allocation);
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if (opt->dst1opt && !np->cork.opt->dst1opt)
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return -ENOBUFS;
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np->cork.opt->hopopt = ip6_opt_dup(opt->hopopt,
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sk->sk_allocation);
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if (opt->hopopt && !np->cork.opt->hopopt)
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return -ENOBUFS;
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np->cork.opt->srcrt = ip6_rthdr_dup(opt->srcrt,
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sk->sk_allocation);
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if (opt->srcrt && !np->cork.opt->srcrt)
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return -ENOBUFS;
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/* need source address above miyazawa*/
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}
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dst_hold(&rt->dst);
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cork->dst = &rt->dst;
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inet->cork.fl.u.ip6 = *fl6;
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np->cork.hop_limit = hlimit;
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np->cork.tclass = tclass;
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if (rt->dst.flags & DST_XFRM_TUNNEL)
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mtu = np->pmtudisc >= IPV6_PMTUDISC_PROBE ?
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rt->dst.dev->mtu : dst_mtu(&rt->dst);
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else
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mtu = np->pmtudisc >= IPV6_PMTUDISC_PROBE ?
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rt->dst.dev->mtu : dst_mtu(rt->dst.path);
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if (np->frag_size < mtu) {
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if (np->frag_size)
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mtu = np->frag_size;
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}
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cork->fragsize = mtu;
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if (dst_allfrag(rt->dst.path))
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cork->flags |= IPCORK_ALLFRAG;
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cork->length = 0;
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err = ip6_setup_cork(sk, &inet->cork, &np->cork, hlimit,
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tclass, opt, rt, fl6);
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if (err)
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return err;
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exthdrlen = (opt ? opt->opt_flen : 0);
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length += exthdrlen;
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transhdrlen += exthdrlen;
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@ -1226,8 +1245,8 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
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transhdrlen = 0;
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exthdrlen = 0;
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dst_exthdrlen = 0;
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mtu = cork->fragsize;
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}
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mtu = cork->fragsize;
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orig_mtu = mtu;
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hh_len = LL_RESERVED_SPACE(rt->dst.dev);
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@ -1503,23 +1522,24 @@ error:
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}
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EXPORT_SYMBOL_GPL(ip6_append_data);
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static void ip6_cork_release(struct inet_sock *inet, struct ipv6_pinfo *np)
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static void ip6_cork_release(struct inet_cork_full *cork,
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struct inet6_cork *v6_cork)
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{
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if (np->cork.opt) {
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kfree(np->cork.opt->dst0opt);
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kfree(np->cork.opt->dst1opt);
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kfree(np->cork.opt->hopopt);
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kfree(np->cork.opt->srcrt);
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kfree(np->cork.opt);
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np->cork.opt = NULL;
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if (v6_cork->opt) {
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kfree(v6_cork->opt->dst0opt);
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kfree(v6_cork->opt->dst1opt);
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kfree(v6_cork->opt->hopopt);
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kfree(v6_cork->opt->srcrt);
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kfree(v6_cork->opt);
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v6_cork->opt = NULL;
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}
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if (inet->cork.base.dst) {
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dst_release(inet->cork.base.dst);
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inet->cork.base.dst = NULL;
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inet->cork.base.flags &= ~IPCORK_ALLFRAG;
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if (cork->base.dst) {
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dst_release(cork->base.dst);
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cork->base.dst = NULL;
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cork->base.flags &= ~IPCORK_ALLFRAG;
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}
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memset(&inet->cork.fl, 0, sizeof(inet->cork.fl));
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memset(&cork->fl, 0, sizeof(cork->fl));
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}
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int ip6_push_pending_frames(struct sock *sk)
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@ -1599,7 +1619,7 @@ int ip6_push_pending_frames(struct sock *sk)
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}
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out:
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ip6_cork_release(inet, np);
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ip6_cork_release(&inet->cork, &np->cork);
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return err;
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error:
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IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
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@ -1618,6 +1638,6 @@ void ip6_flush_pending_frames(struct sock *sk)
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kfree_skb(skb);
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}
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ip6_cork_release(inet_sk(sk), inet6_sk(sk));
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ip6_cork_release(&inet_sk(sk)->cork, &inet6_sk(sk)->cork);
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}
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EXPORT_SYMBOL_GPL(ip6_flush_pending_frames);
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