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synced 2025-11-04 02:30:34 +02:00
net/ipv6: separate handling of FIB entries from dst based routes
Last step before flipping the data type for FIB entries: - use fib6_info_alloc to create FIB entries in ip6_route_info_create and addrconf_dst_alloc - use fib6_info_release in place of dst_release, ip6_rt_put and rt6_release - remove the dst_hold before calling __ip6_ins_rt or ip6_del_rt - when purging routes, drop per-cpu routes - replace inc and dec of rt6i_ref with fib6_info_hold and fib6_info_release - use rt->from since it points to the FIB entry - drop references to exception bucket, fib6_metrics and per-cpu from dst entries (those are relevant for fib entries only) Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern
David S. Miller
parent
a64efe142f
commit
93531c6743
8 changed files with 115 additions and 152 deletions
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@ -314,9 +314,7 @@ static inline u32 rt6_get_cookie(const struct rt6_info *rt)
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if (rt->rt6i_flags & RTF_PCPU ||
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(unlikely(!list_empty(&rt->rt6i_uncached)) && rt->from))
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rt = rt->from;
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rt6_get_cookie_safe(rt, &cookie);
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rt6_get_cookie_safe(rt->from, &cookie);
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return cookie;
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}
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@ -114,8 +114,7 @@ static inline int ip6_route_get_saddr(struct net *net, struct rt6_info *rt,
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unsigned int prefs,
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struct in6_addr *saddr)
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{
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struct inet6_dev *idev =
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rt ? ip6_dst_idev((struct dst_entry *)rt) : NULL;
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struct inet6_dev *idev = rt ? rt->rt6i_idev : NULL;
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int err = 0;
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if (rt && rt->rt6i_prefsrc.plen)
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@ -916,7 +916,6 @@ void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
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pr_warn("Freeing alive inet6 address %p\n", ifp);
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return;
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}
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ip6_rt_put(ifp->rt);
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kfree_rcu(ifp, rcu);
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}
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@ -1102,8 +1101,8 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
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inet6addr_notifier_call_chain(NETDEV_UP, ifa);
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out:
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if (unlikely(err < 0)) {
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if (rt)
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ip6_rt_put(rt);
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fib6_info_release(rt);
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if (ifa) {
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if (ifa->idev)
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in6_dev_put(ifa->idev);
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@ -1191,7 +1190,7 @@ cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, bool del_r
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else {
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if (!(rt->rt6i_flags & RTF_EXPIRES))
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fib6_set_expires(rt, expires);
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ip6_rt_put(rt);
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fib6_info_release(rt);
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}
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}
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}
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@ -2375,8 +2374,7 @@ static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
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continue;
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if ((rt->rt6i_flags & noflags) != 0)
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continue;
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if (!dst_hold_safe(&rt->dst))
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rt = NULL;
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fib6_info_hold(rt);
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break;
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}
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out:
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@ -2687,7 +2685,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
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addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
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dev, expires, flags, GFP_ATOMIC);
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}
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ip6_rt_put(rt);
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fib6_info_release(rt);
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}
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/* Try to figure out our local address for this prefix */
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@ -3361,7 +3359,7 @@ static int fixup_permanent_addr(struct net *net,
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ifp->rt = rt;
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spin_unlock(&ifp->lock);
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ip6_rt_put(prev);
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fib6_info_release(prev);
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}
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if (!(ifp->flags & IFA_F_NOPREFIXROUTE)) {
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@ -5636,8 +5634,8 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
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ip6_del_rt(net, rt);
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}
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if (ifp->rt) {
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if (dst_hold_safe(&ifp->rt->dst))
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ip6_del_rt(net, ifp->rt);
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ip6_del_rt(net, ifp->rt);
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ifp->rt = NULL;
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}
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rt_genid_bump_ipv6(net);
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break;
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@ -213,7 +213,7 @@ static void aca_put(struct ifacaddr6 *ac)
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{
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if (refcount_dec_and_test(&ac->aca_refcnt)) {
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in6_dev_put(ac->aca_idev);
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dst_release(&ac->aca_rt->dst);
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fib6_info_release(ac->aca_rt);
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kfree(ac);
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}
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}
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@ -231,6 +231,7 @@ static struct ifacaddr6 *aca_alloc(struct rt6_info *rt,
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aca->aca_addr = *addr;
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in6_dev_hold(idev);
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aca->aca_idev = idev;
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fib6_info_hold(rt);
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aca->aca_rt = rt;
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aca->aca_users = 1;
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/* aca_tstamp should be updated upon changes */
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@ -274,7 +275,7 @@ int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr)
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}
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aca = aca_alloc(rt, addr);
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if (!aca) {
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ip6_rt_put(rt);
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fib6_info_release(rt);
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err = -ENOMEM;
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goto out;
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}
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@ -330,7 +331,6 @@ int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr)
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write_unlock_bh(&idev->lock);
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addrconf_leave_solict(idev, &aca->aca_addr);
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dst_hold(&aca->aca_rt->dst);
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ip6_del_rt(dev_net(idev->dev), aca->aca_rt);
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aca_put(aca);
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@ -358,7 +358,6 @@ void ipv6_ac_destroy_dev(struct inet6_dev *idev)
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addrconf_leave_solict(idev, &aca->aca_addr);
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dst_hold(&aca->aca_rt->dst);
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ip6_del_rt(dev_net(idev->dev), aca->aca_rt);
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aca_put(aca);
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@ -170,6 +170,7 @@ struct rt6_info *fib6_info_alloc(gfp_t gfp_flags)
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void fib6_info_destroy(struct rt6_info *f6i)
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{
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struct rt6_exception_bucket *bucket;
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struct dst_metrics *m;
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WARN_ON(f6i->rt6i_node);
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@ -201,6 +202,10 @@ void fib6_info_destroy(struct rt6_info *f6i)
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if (f6i->fib6_nh.nh_dev)
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dev_put(f6i->fib6_nh.nh_dev);
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m = f6i->fib6_metrics;
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if (m != &dst_default_metrics && refcount_dec_and_test(&m->refcnt))
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kfree(m);
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kfree(f6i);
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}
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EXPORT_SYMBOL_GPL(fib6_info_destroy);
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@ -714,7 +719,7 @@ static struct fib6_node *fib6_add_1(struct net *net,
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/* clean up an intermediate node */
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if (!(fn->fn_flags & RTN_RTINFO)) {
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RCU_INIT_POINTER(fn->leaf, NULL);
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rt6_release(leaf);
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fib6_info_release(leaf);
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/* remove null_entry in the root node */
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} else if (fn->fn_flags & RTN_TL_ROOT &&
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rcu_access_pointer(fn->leaf) ==
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@ -898,12 +903,32 @@ static void fib6_purge_rt(struct rt6_info *rt, struct fib6_node *fn,
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if (!(fn->fn_flags & RTN_RTINFO) && leaf == rt) {
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new_leaf = fib6_find_prefix(net, table, fn);
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atomic_inc(&new_leaf->rt6i_ref);
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rcu_assign_pointer(fn->leaf, new_leaf);
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rt6_release(rt);
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fib6_info_release(rt);
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}
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fn = rcu_dereference_protected(fn->parent,
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lockdep_is_held(&table->tb6_lock));
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}
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if (rt->rt6i_pcpu) {
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int cpu;
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/* release the reference to this fib entry from
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* all of its cached pcpu routes
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*/
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for_each_possible_cpu(cpu) {
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struct rt6_info **ppcpu_rt;
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struct rt6_info *pcpu_rt;
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ppcpu_rt = per_cpu_ptr(rt->rt6i_pcpu, cpu);
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pcpu_rt = *ppcpu_rt;
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if (pcpu_rt) {
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fib6_info_release(pcpu_rt->from);
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pcpu_rt->from = NULL;
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}
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}
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}
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}
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}
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@ -1099,7 +1124,7 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
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fib6_purge_rt(iter, fn, info->nl_net);
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if (rcu_access_pointer(fn->rr_ptr) == iter)
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fn->rr_ptr = NULL;
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rt6_release(iter);
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fib6_info_release(iter);
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if (nsiblings) {
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/* Replacing an ECMP route, remove all siblings */
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@ -1115,7 +1140,7 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
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fib6_purge_rt(iter, fn, info->nl_net);
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if (rcu_access_pointer(fn->rr_ptr) == iter)
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fn->rr_ptr = NULL;
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rt6_release(iter);
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fib6_info_release(iter);
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nsiblings--;
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info->nl_net->ipv6.rt6_stats->fib_rt_entries--;
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} else {
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@ -1183,9 +1208,6 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt,
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int replace_required = 0;
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int sernum = fib6_new_sernum(info->nl_net);
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if (WARN_ON_ONCE(!atomic_read(&rt->dst.__refcnt)))
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return -EINVAL;
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if (info->nlh) {
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if (!(info->nlh->nlmsg_flags & NLM_F_CREATE))
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allow_create = 0;
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@ -1300,7 +1322,7 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt,
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if (pn_leaf == rt) {
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pn_leaf = NULL;
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RCU_INIT_POINTER(pn->leaf, NULL);
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atomic_dec(&rt->rt6i_ref);
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fib6_info_release(rt);
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}
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if (!pn_leaf && !(pn->fn_flags & RTN_RTINFO)) {
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pn_leaf = fib6_find_prefix(info->nl_net, table,
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@ -1312,7 +1334,7 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt,
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info->nl_net->ipv6.fib6_null_entry;
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}
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#endif
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atomic_inc(&pn_leaf->rt6i_ref);
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fib6_info_hold(pn_leaf);
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rcu_assign_pointer(pn->leaf, pn_leaf);
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}
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}
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@ -1334,10 +1356,6 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt,
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(fn->fn_flags & RTN_TL_ROOT &&
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!rcu_access_pointer(fn->leaf))))
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fib6_repair_tree(info->nl_net, table, fn);
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/* Always release dst as dst->__refcnt is guaranteed
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* to be taken before entering this function
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*/
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dst_release_immediate(&rt->dst);
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return err;
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}
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@ -1637,7 +1655,7 @@ static struct fib6_node *fib6_repair_tree(struct net *net,
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new_fn_leaf = net->ipv6.fib6_null_entry;
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}
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#endif
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atomic_inc(&new_fn_leaf->rt6i_ref);
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fib6_info_hold(new_fn_leaf);
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rcu_assign_pointer(fn->leaf, new_fn_leaf);
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return pn;
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}
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@ -1693,7 +1711,7 @@ static struct fib6_node *fib6_repair_tree(struct net *net,
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return pn;
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RCU_INIT_POINTER(pn->leaf, NULL);
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rt6_release(pn_leaf);
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fib6_info_release(pn_leaf);
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fn = pn;
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}
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}
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@ -1763,7 +1781,7 @@ static void fib6_del_route(struct fib6_table *table, struct fib6_node *fn,
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call_fib6_entry_notifiers(net, FIB_EVENT_ENTRY_DEL, rt, NULL);
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if (!info->skip_notify)
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inet6_rt_notify(RTM_DELROUTE, rt, info, 0);
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rt6_release(rt);
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fib6_info_release(rt);
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}
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/* Need to own table->tb6_lock */
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@ -2261,9 +2279,8 @@ static int ipv6_route_seq_show(struct seq_file *seq, void *v)
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dev = rt->fib6_nh.nh_dev;
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seq_printf(seq, " %08x %08x %08x %08x %8s\n",
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rt->rt6i_metric, atomic_read(&rt->dst.__refcnt),
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rt->dst.__use, rt->rt6i_flags,
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dev ? dev->name : "");
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rt->rt6i_metric, atomic_read(&rt->rt6i_ref), 0,
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rt->rt6i_flags, dev ? dev->name : "");
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iter->w.leaf = NULL;
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return 0;
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}
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@ -968,7 +968,8 @@ static int ip6_dst_lookup_tail(struct net *net, const struct sock *sk,
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if (!had_dst)
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*dst = ip6_route_output(net, sk, fl6);
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rt = (*dst)->error ? NULL : (struct rt6_info *)*dst;
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err = ip6_route_get_saddr(net, rt, &fl6->daddr,
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err = ip6_route_get_saddr(net, rt ? rt->from : NULL,
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&fl6->daddr,
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sk ? inet6_sk(sk)->srcprefs : 0,
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&fl6->saddr);
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if (err)
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@ -1283,7 +1283,7 @@ static void ndisc_router_discovery(struct sk_buff *skb)
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ND_PRINTK(0, err,
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"RA: %s got default router without neighbour\n",
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__func__);
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ip6_rt_put(rt);
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fib6_info_release(rt);
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return;
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}
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}
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@ -1313,7 +1313,7 @@ static void ndisc_router_discovery(struct sk_buff *skb)
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ND_PRINTK(0, err,
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"RA: %s got default router without neighbour\n",
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__func__);
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ip6_rt_put(rt);
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fib6_info_release(rt);
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return;
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}
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neigh->flags |= NTF_ROUTER;
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@ -1499,7 +1499,7 @@ static void ndisc_router_discovery(struct sk_buff *skb)
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ND_PRINTK(2, warn, "RA: invalid RA options\n");
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}
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out:
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ip6_rt_put(rt);
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fib6_info_release(rt);
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if (neigh)
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neigh_release(neigh);
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}
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171
net/ipv6/route.c
171
net/ipv6/route.c
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@ -351,13 +351,11 @@ static void rt6_info_init(struct rt6_info *rt)
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memset(dst + 1, 0, sizeof(*rt) - sizeof(*dst));
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INIT_LIST_HEAD(&rt->rt6i_siblings);
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INIT_LIST_HEAD(&rt->rt6i_uncached);
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rt->fib6_metrics = (struct dst_metrics *)&dst_default_metrics;
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}
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/* allocate dst with ip6_dst_ops */
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static struct rt6_info *__ip6_dst_alloc(struct net *net,
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struct net_device *dev,
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int flags)
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struct rt6_info *ip6_dst_alloc(struct net *net, struct net_device *dev,
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int flags)
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{
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struct rt6_info *rt = dst_alloc(&net->ipv6.ip6_dst_ops, dev,
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1, DST_OBSOLETE_FORCE_CHK, flags);
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@ -369,35 +367,15 @@ static struct rt6_info *__ip6_dst_alloc(struct net *net,
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return rt;
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}
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struct rt6_info *ip6_dst_alloc(struct net *net,
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struct net_device *dev,
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int flags)
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{
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struct rt6_info *rt = __ip6_dst_alloc(net, dev, flags);
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if (rt) {
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rt->rt6i_pcpu = alloc_percpu_gfp(struct rt6_info *, GFP_ATOMIC);
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if (!rt->rt6i_pcpu) {
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dst_release_immediate(&rt->dst);
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return NULL;
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}
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}
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return rt;
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}
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EXPORT_SYMBOL(ip6_dst_alloc);
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static void ip6_dst_destroy(struct dst_entry *dst)
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{
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struct rt6_info *rt = (struct rt6_info *)dst;
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struct rt6_exception_bucket *bucket;
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struct rt6_info *from = rt->from;
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struct inet6_dev *idev;
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struct dst_metrics *m;
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dst_destroy_metrics_generic(dst);
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free_percpu(rt->rt6i_pcpu);
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rt6_uncached_list_del(rt);
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idev = rt->rt6i_idev;
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@ -405,18 +383,9 @@ static void ip6_dst_destroy(struct dst_entry *dst)
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rt->rt6i_idev = NULL;
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in6_dev_put(idev);
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}
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bucket = rcu_dereference_protected(rt->rt6i_exception_bucket, 1);
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if (bucket) {
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rt->rt6i_exception_bucket = NULL;
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kfree(bucket);
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||||
}
|
||||
|
||||
m = rt->fib6_metrics;
|
||||
if (m != &dst_default_metrics && refcount_dec_and_test(&m->refcnt))
|
||||
kfree(m);
|
||||
|
||||
rt->from = NULL;
|
||||
dst_release(&from->dst);
|
||||
fib6_info_release(from);
|
||||
}
|
||||
|
||||
static void ip6_dst_ifdown(struct dst_entry *dst, struct net_device *dev,
|
||||
|
|
@ -891,7 +860,7 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
|
|||
else
|
||||
fib6_set_expires(rt, jiffies + HZ * lifetime);
|
||||
|
||||
ip6_rt_put(rt);
|
||||
fib6_info_release(rt);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -1010,11 +979,9 @@ static void ip6_rt_init_dst(struct rt6_info *rt, struct rt6_info *ort)
|
|||
|
||||
static void rt6_set_from(struct rt6_info *rt, struct rt6_info *from)
|
||||
{
|
||||
BUG_ON(from->from);
|
||||
|
||||
rt->rt6i_flags &= ~RTF_EXPIRES;
|
||||
if (dst_hold_safe(&from->dst))
|
||||
rt->from = from;
|
||||
fib6_info_hold(from);
|
||||
rt->from = from;
|
||||
dst_init_metrics(&rt->dst, from->fib6_metrics->metrics, true);
|
||||
if (from->fib6_metrics != &dst_default_metrics) {
|
||||
rt->dst._metrics |= DST_METRICS_REFCOUNTED;
|
||||
|
|
@ -1084,7 +1051,7 @@ static struct rt6_info *ip6_create_rt_rcu(struct rt6_info *rt)
|
|||
struct net_device *dev = rt->fib6_nh.nh_dev;
|
||||
struct rt6_info *nrt;
|
||||
|
||||
nrt = __ip6_dst_alloc(dev_net(dev), dev, flags);
|
||||
nrt = ip6_dst_alloc(dev_net(dev), dev, flags);
|
||||
if (nrt)
|
||||
ip6_rt_copy_init(nrt, rt);
|
||||
|
||||
|
|
@ -1203,8 +1170,6 @@ int ip6_ins_rt(struct net *net, struct rt6_info *rt)
|
|||
{
|
||||
struct nl_info info = { .nl_net = net, };
|
||||
|
||||
/* Hold dst to account for the reference from the fib6 tree */
|
||||
dst_hold(&rt->dst);
|
||||
return __ip6_ins_rt(rt, &info, NULL);
|
||||
}
|
||||
|
||||
|
|
@ -1221,7 +1186,7 @@ static struct rt6_info *ip6_rt_cache_alloc(struct rt6_info *ort,
|
|||
|
||||
rcu_read_lock();
|
||||
dev = ip6_rt_get_dev_rcu(ort);
|
||||
rt = __ip6_dst_alloc(dev_net(dev), dev, 0);
|
||||
rt = ip6_dst_alloc(dev_net(dev), dev, 0);
|
||||
rcu_read_unlock();
|
||||
if (!rt)
|
||||
return NULL;
|
||||
|
|
@ -1256,7 +1221,7 @@ static struct rt6_info *ip6_rt_pcpu_alloc(struct rt6_info *rt)
|
|||
|
||||
rcu_read_lock();
|
||||
dev = ip6_rt_get_dev_rcu(rt);
|
||||
pcpu_rt = __ip6_dst_alloc(dev_net(dev), dev, flags);
|
||||
pcpu_rt = ip6_dst_alloc(dev_net(dev), dev, flags);
|
||||
rcu_read_unlock();
|
||||
if (!pcpu_rt)
|
||||
return NULL;
|
||||
|
|
@ -1317,7 +1282,7 @@ static void rt6_remove_exception(struct rt6_exception_bucket *bucket,
|
|||
net = dev_net(rt6_ex->rt6i->dst.dev);
|
||||
rt6_ex->rt6i->rt6i_node = NULL;
|
||||
hlist_del_rcu(&rt6_ex->hlist);
|
||||
rt6_release(rt6_ex->rt6i);
|
||||
ip6_rt_put(rt6_ex->rt6i);
|
||||
kfree_rcu(rt6_ex, rcu);
|
||||
WARN_ON_ONCE(!bucket->depth);
|
||||
bucket->depth--;
|
||||
|
|
@ -1907,17 +1872,11 @@ struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table,
|
|||
|
||||
struct rt6_info *uncached_rt;
|
||||
|
||||
if (ip6_hold_safe(net, &f6i, true)) {
|
||||
dst_use_noref(&f6i->dst, jiffies);
|
||||
} else {
|
||||
rcu_read_unlock();
|
||||
uncached_rt = f6i;
|
||||
goto uncached_rt_out;
|
||||
}
|
||||
fib6_info_hold(f6i);
|
||||
rcu_read_unlock();
|
||||
|
||||
uncached_rt = ip6_rt_cache_alloc(f6i, &fl6->daddr, NULL);
|
||||
dst_release(&rt->dst);
|
||||
fib6_info_release(f6i);
|
||||
|
||||
if (uncached_rt) {
|
||||
/* Uncached_rt's refcnt is taken during ip6_rt_cache_alloc()
|
||||
|
|
@ -1930,7 +1889,6 @@ struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table,
|
|||
dst_hold(&uncached_rt->dst);
|
||||
}
|
||||
|
||||
uncached_rt_out:
|
||||
trace_fib6_table_lookup(net, uncached_rt, table, fl6);
|
||||
return uncached_rt;
|
||||
|
||||
|
|
@ -1939,24 +1897,12 @@ struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table,
|
|||
|
||||
struct rt6_info *pcpu_rt;
|
||||
|
||||
dst_use_noref(&f6i->dst, jiffies);
|
||||
local_bh_disable();
|
||||
pcpu_rt = rt6_get_pcpu_route(f6i);
|
||||
|
||||
if (!pcpu_rt) {
|
||||
/* atomic_inc_not_zero() is needed when using rcu */
|
||||
if (atomic_inc_not_zero(&f6i->rt6i_ref)) {
|
||||
/* No dst_hold() on rt is needed because grabbing
|
||||
* rt->rt6i_ref makes sure rt can't be released.
|
||||
*/
|
||||
pcpu_rt = rt6_make_pcpu_route(net, f6i);
|
||||
rt6_release(f6i);
|
||||
} else {
|
||||
/* rt is already removed from tree */
|
||||
pcpu_rt = net->ipv6.ip6_null_entry;
|
||||
dst_hold(&pcpu_rt->dst);
|
||||
}
|
||||
}
|
||||
if (!pcpu_rt)
|
||||
pcpu_rt = rt6_make_pcpu_route(net, f6i);
|
||||
|
||||
local_bh_enable();
|
||||
rcu_read_unlock();
|
||||
trace_fib6_table_lookup(net, pcpu_rt, table, fl6);
|
||||
|
|
@ -2193,11 +2139,26 @@ struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_ori
|
|||
* Destination cache support functions
|
||||
*/
|
||||
|
||||
static bool fib6_check(struct rt6_info *f6i, u32 cookie)
|
||||
{
|
||||
u32 rt_cookie = 0;
|
||||
|
||||
if ((f6i && !rt6_get_cookie_safe(f6i, &rt_cookie)) ||
|
||||
rt_cookie != cookie)
|
||||
return false;
|
||||
|
||||
if (fib6_check_expired(f6i))
|
||||
return false;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static struct dst_entry *rt6_check(struct rt6_info *rt, u32 cookie)
|
||||
{
|
||||
u32 rt_cookie = 0;
|
||||
|
||||
if (!rt6_get_cookie_safe(rt, &rt_cookie) || rt_cookie != cookie)
|
||||
if ((rt->from && !rt6_get_cookie_safe(rt->from, &rt_cookie)) ||
|
||||
rt_cookie != cookie)
|
||||
return NULL;
|
||||
|
||||
if (rt6_check_expired(rt))
|
||||
|
|
@ -2210,7 +2171,7 @@ static struct dst_entry *rt6_dst_from_check(struct rt6_info *rt, u32 cookie)
|
|||
{
|
||||
if (!__rt6_check_expired(rt) &&
|
||||
rt->dst.obsolete == DST_OBSOLETE_FORCE_CHK &&
|
||||
rt6_check(rt->from, cookie))
|
||||
fib6_check(rt->from, cookie))
|
||||
return &rt->dst;
|
||||
else
|
||||
return NULL;
|
||||
|
|
@ -2241,7 +2202,7 @@ static struct dst_entry *ip6_negative_advice(struct dst_entry *dst)
|
|||
if (rt) {
|
||||
if (rt->rt6i_flags & RTF_CACHE) {
|
||||
if (rt6_check_expired(rt)) {
|
||||
ip6_del_rt(dev_net(dst->dev), rt);
|
||||
rt6_remove_exception_rt(rt);
|
||||
dst = NULL;
|
||||
}
|
||||
} else {
|
||||
|
|
@ -2262,12 +2223,12 @@ static void ip6_link_failure(struct sk_buff *skb)
|
|||
if (rt) {
|
||||
if (rt->rt6i_flags & RTF_CACHE) {
|
||||
if (dst_hold_safe(&rt->dst))
|
||||
ip6_del_rt(dev_net(rt->dst.dev), rt);
|
||||
} else {
|
||||
rt6_remove_exception_rt(rt);
|
||||
} else if (rt->from) {
|
||||
struct fib6_node *fn;
|
||||
|
||||
rcu_read_lock();
|
||||
fn = rcu_dereference(rt->rt6i_node);
|
||||
fn = rcu_dereference(rt->from->rt6i_node);
|
||||
if (fn && (rt->rt6i_flags & RTF_DEFAULT))
|
||||
fn->fn_sernum = -1;
|
||||
rcu_read_unlock();
|
||||
|
|
@ -2949,13 +2910,13 @@ static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg,
|
|||
if (!table)
|
||||
goto out;
|
||||
|
||||
rt = ip6_dst_alloc(net, NULL,
|
||||
(cfg->fc_flags & RTF_ADDRCONF) ? 0 : DST_NOCOUNT);
|
||||
|
||||
if (!rt) {
|
||||
err = -ENOMEM;
|
||||
err = -ENOMEM;
|
||||
rt = fib6_info_alloc(gfp_flags);
|
||||
if (!rt)
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (cfg->fc_flags & RTF_ADDRCONF)
|
||||
rt->dst_nocount = true;
|
||||
|
||||
err = ip6_convert_metrics(net, rt, cfg);
|
||||
if (err < 0)
|
||||
|
|
@ -3029,7 +2990,7 @@ static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg,
|
|||
if (err)
|
||||
goto out;
|
||||
|
||||
rt->fib6_nh.nh_gw = rt->rt6i_gateway = cfg->fc_gateway;
|
||||
rt->fib6_nh.nh_gw = cfg->fc_gateway;
|
||||
}
|
||||
|
||||
err = -ENODEV;
|
||||
|
|
@ -3066,7 +3027,7 @@ static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg,
|
|||
!netif_carrier_ok(dev))
|
||||
rt->fib6_nh.nh_flags |= RTNH_F_LINKDOWN;
|
||||
rt->fib6_nh.nh_flags |= (cfg->fc_flags & RTNH_F_ONLINK);
|
||||
rt->fib6_nh.nh_dev = rt->dst.dev = dev;
|
||||
rt->fib6_nh.nh_dev = dev;
|
||||
rt->rt6i_idev = idev;
|
||||
rt->rt6i_table = table;
|
||||
|
||||
|
|
@ -3078,9 +3039,8 @@ static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg,
|
|||
dev_put(dev);
|
||||
if (idev)
|
||||
in6_dev_put(idev);
|
||||
if (rt)
|
||||
dst_release_immediate(&rt->dst);
|
||||
|
||||
fib6_info_release(rt);
|
||||
return ERR_PTR(err);
|
||||
}
|
||||
|
||||
|
|
@ -3095,6 +3055,7 @@ int ip6_route_add(struct fib6_config *cfg, gfp_t gfp_flags,
|
|||
return PTR_ERR(rt);
|
||||
|
||||
err = __ip6_ins_rt(rt, &cfg->fc_nlinfo, extack);
|
||||
fib6_info_release(rt);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
|
@ -3116,7 +3077,7 @@ static int __ip6_del_rt(struct rt6_info *rt, struct nl_info *info)
|
|||
spin_unlock_bh(&table->tb6_lock);
|
||||
|
||||
out:
|
||||
ip6_rt_put(rt);
|
||||
fib6_info_release(rt);
|
||||
return err;
|
||||
}
|
||||
|
||||
|
|
@ -3170,7 +3131,7 @@ static int __ip6_del_rt_siblings(struct rt6_info *rt, struct fib6_config *cfg)
|
|||
out_unlock:
|
||||
spin_unlock_bh(&table->tb6_lock);
|
||||
out_put:
|
||||
ip6_rt_put(rt);
|
||||
fib6_info_release(rt);
|
||||
|
||||
if (skb) {
|
||||
rtnl_notify(skb, net, info->portid, RTNLGRP_IPV6_ROUTE,
|
||||
|
|
@ -3241,8 +3202,7 @@ static int ip6_route_del(struct fib6_config *cfg,
|
|||
continue;
|
||||
if (cfg->fc_protocol && cfg->fc_protocol != rt->rt6i_protocol)
|
||||
continue;
|
||||
if (!dst_hold_safe(&rt->dst))
|
||||
break;
|
||||
fib6_info_hold(rt);
|
||||
rcu_read_unlock();
|
||||
|
||||
/* if gateway was specified only delete the one hop */
|
||||
|
|
@ -3510,12 +3470,9 @@ static void __rt6_purge_dflt_routers(struct net *net,
|
|||
for_each_fib6_node_rt_rcu(&table->tb6_root) {
|
||||
if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF) &&
|
||||
(!rt->rt6i_idev || rt->rt6i_idev->cnf.accept_ra != 2)) {
|
||||
if (dst_hold_safe(&rt->dst)) {
|
||||
rcu_read_unlock();
|
||||
ip6_del_rt(net, rt);
|
||||
} else {
|
||||
rcu_read_unlock();
|
||||
}
|
||||
fib6_info_hold(rt);
|
||||
rcu_read_unlock();
|
||||
ip6_del_rt(net, rt);
|
||||
goto restart;
|
||||
}
|
||||
}
|
||||
|
|
@ -3666,7 +3623,7 @@ struct rt6_info *addrconf_dst_alloc(struct net *net,
|
|||
struct net_device *dev = idev->dev;
|
||||
struct rt6_info *rt;
|
||||
|
||||
rt = ip6_dst_alloc(net, dev, DST_NOCOUNT);
|
||||
rt = fib6_info_alloc(gfp_flags);
|
||||
if (!rt)
|
||||
return ERR_PTR(-ENOMEM);
|
||||
|
||||
|
|
@ -3687,8 +3644,8 @@ struct rt6_info *addrconf_dst_alloc(struct net *net,
|
|||
}
|
||||
|
||||
rt->fib6_nh.nh_gw = *addr;
|
||||
dev_hold(dev);
|
||||
rt->fib6_nh.nh_dev = dev;
|
||||
rt->rt6i_gateway = *addr;
|
||||
rt->rt6i_dst.addr = *addr;
|
||||
rt->rt6i_dst.plen = 128;
|
||||
tb_id = l3mdev_fib_table(idev->dev) ? : RT6_TABLE_LOCAL;
|
||||
|
|
@ -4325,7 +4282,7 @@ static int ip6_route_multipath_add(struct fib6_config *cfg,
|
|||
err = ip6_route_info_append(info->nl_net, &rt6_nh_list,
|
||||
rt, &r_cfg);
|
||||
if (err) {
|
||||
dst_release_immediate(&rt->dst);
|
||||
fib6_info_release(rt);
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
|
|
@ -4342,6 +4299,8 @@ static int ip6_route_multipath_add(struct fib6_config *cfg,
|
|||
list_for_each_entry(nh, &rt6_nh_list, next) {
|
||||
rt_last = nh->rt6_info;
|
||||
err = __ip6_ins_rt(nh->rt6_info, info, extack);
|
||||
fib6_info_release(nh->rt6_info);
|
||||
|
||||
/* save reference to first route for notification */
|
||||
if (!rt_notif && !err)
|
||||
rt_notif = nh->rt6_info;
|
||||
|
|
@ -4389,7 +4348,7 @@ static int ip6_route_multipath_add(struct fib6_config *cfg,
|
|||
cleanup:
|
||||
list_for_each_entry_safe(nh, nh_safe, &rt6_nh_list, next) {
|
||||
if (nh->rt6_info)
|
||||
dst_release_immediate(&nh->rt6_info->dst);
|
||||
fib6_info_release(nh->rt6_info);
|
||||
list_del(&nh->next);
|
||||
kfree(nh);
|
||||
}
|
||||
|
|
@ -4814,14 +4773,6 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh,
|
|||
goto errout;
|
||||
}
|
||||
|
||||
if (fibmatch && rt->from) {
|
||||
struct rt6_info *ort = rt->from;
|
||||
|
||||
dst_hold(&ort->dst);
|
||||
ip6_rt_put(rt);
|
||||
rt = ort;
|
||||
}
|
||||
|
||||
skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
|
||||
if (!skb) {
|
||||
ip6_rt_put(rt);
|
||||
|
|
@ -4831,12 +4782,12 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh,
|
|||
|
||||
skb_dst_set(skb, &rt->dst);
|
||||
if (fibmatch)
|
||||
err = rt6_fill_node(net, skb, rt, NULL, NULL, NULL, iif,
|
||||
err = rt6_fill_node(net, skb, rt->from, NULL, NULL, NULL, iif,
|
||||
RTM_NEWROUTE, NETLINK_CB(in_skb).portid,
|
||||
nlh->nlmsg_seq, 0);
|
||||
else
|
||||
err = rt6_fill_node(net, skb, rt, dst, &fl6.daddr, &fl6.saddr,
|
||||
iif, RTM_NEWROUTE,
|
||||
err = rt6_fill_node(net, skb, rt->from, dst,
|
||||
&fl6.daddr, &fl6.saddr, iif, RTM_NEWROUTE,
|
||||
NETLINK_CB(in_skb).portid, nlh->nlmsg_seq,
|
||||
0);
|
||||
if (err < 0) {
|
||||
|
|
|
|||
Loading…
Reference in a new issue