struct inet_peer *peer;
u32 *p = NULL;
- if (!rt->peer)
- rt_bind_peer(rt, rt->rt_dst, 1);
-
- peer = rt->peer;
+ peer = rt_get_peer_create(rt, rt->rt_dst);
if (peer) {
u32 *old_p = __DST_METRICS_PTR(old);
unsigned long prev, new;
static inline int rt_valuable(struct rtable *rth)
{
return (rth->rt_flags & (RTCF_REDIRECTED | RTCF_NOTIFY)) ||
- (rth->peer && rth->peer->pmtu_expires);
+ (rt_has_peer(rth) && rt_peer_ptr(rth)->pmtu_expires);
}
static int rt_may_expire(struct rtable *rth, unsigned long tmo1, unsigned long tmo2)
get_random_bytes(&shuffle, sizeof(shuffle));
atomic_add(shuffle + 1U, &net->ipv4.rt_genid);
- inetpeer_invalidate_tree(AF_INET);
+ inetpeer_invalidate_family(AF_INET);
}
/*
void rt_bind_peer(struct rtable *rt, __be32 daddr, int create)
{
+ struct inet_peer_base *base;
struct inet_peer *peer;
- peer = inet_getpeer_v4(daddr, create);
+ base = inetpeer_base_ptr(rt->_peer);
+ if (!base)
+ return;
- if (peer && cmpxchg(&rt->peer, NULL, peer) != NULL)
- inet_putpeer(peer);
- else
- rt->rt_peer_genid = rt_peer_genid();
+ peer = inet_getpeer_v4(base, daddr, create);
+ if (peer) {
+ if (!rt_set_peer(rt, peer))
+ inet_putpeer(peer);
+ else
+ rt->rt_peer_genid = rt_peer_genid();
+ }
}
/*
struct rtable *rt = (struct rtable *) dst;
if (rt && !(rt->dst.flags & DST_NOPEER)) {
- if (rt->peer == NULL)
- rt_bind_peer(rt, rt->rt_dst, 1);
+ struct inet_peer *peer = rt_get_peer_create(rt, rt->rt_dst);
/* If peer is attached to destination, it is never detached,
so that we need not to grab a lock to dereference it.
*/
- if (rt->peer) {
- iph->id = htons(inet_getid(rt->peer, more));
+ if (peer) {
+ iph->id = htons(inet_getid(peer, more));
return;
}
} else if (!rt)
rt->rt_gateway != old_gw)
continue;
- if (!rt->peer)
- rt_bind_peer(rt, rt->rt_dst, 1);
-
- peer = rt->peer;
+ peer = rt_get_peer_create(rt, rt->rt_dst);
if (peer) {
if (peer->redirect_learned.a4 != new_gw) {
peer->redirect_learned.a4 = new_gw;
rt_genid(dev_net(dst->dev)));
rt_del(hash, rt);
ret = NULL;
- } else if (rt->peer && peer_pmtu_expired(rt->peer)) {
- dst_metric_set(dst, RTAX_MTU, rt->peer->pmtu_orig);
+ } else if (rt_has_peer(rt)) {
+ struct inet_peer *peer = rt_peer_ptr(rt);
+ if (peer_pmtu_expired(peer))
+ dst_metric_set(dst, RTAX_MTU, peer->pmtu_orig);
}
}
return ret;
log_martians = IN_DEV_LOG_MARTIANS(in_dev);
rcu_read_unlock();
- if (!rt->peer)
- rt_bind_peer(rt, rt->rt_dst, 1);
- peer = rt->peer;
+ peer = rt_get_peer_create(rt, rt->rt_dst);
if (!peer) {
icmp_send(skb, ICMP_REDIRECT, ICMP_REDIR_HOST, rt->rt_gateway);
return;
break;
}
- if (!rt->peer)
- rt_bind_peer(rt, rt->rt_dst, 1);
- peer = rt->peer;
+ peer = rt_get_peer_create(rt, rt->rt_dst);
send = true;
if (peer) {
return 0;
}
-/*
- * The last two values are not from the RFC but
- * are needed for AMPRnet AX.25 paths.
- */
-
-static const unsigned short mtu_plateau[] =
-{32000, 17914, 8166, 4352, 2002, 1492, 576, 296, 216, 128 };
-
-static inline unsigned short guess_mtu(unsigned short old_mtu)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(mtu_plateau); i++)
- if (old_mtu > mtu_plateau[i])
- return mtu_plateau[i];
- return 68;
-}
-
-unsigned short ip_rt_frag_needed(struct net *net, const struct iphdr *iph,
- unsigned short new_mtu,
- struct net_device *dev)
-{
- unsigned short old_mtu = ntohs(iph->tot_len);
- unsigned short est_mtu = 0;
- struct inet_peer *peer;
-
- peer = inet_getpeer_v4(iph->daddr, 1);
- if (peer) {
- unsigned short mtu = new_mtu;
-
- if (new_mtu < 68 || new_mtu >= old_mtu) {
- /* BSD 4.2 derived systems incorrectly adjust
- * tot_len by the IP header length, and report
- * a zero MTU in the ICMP message.
- */
- if (mtu == 0 &&
- old_mtu >= 68 + (iph->ihl << 2))
- old_mtu -= iph->ihl << 2;
- mtu = guess_mtu(old_mtu);
- }
-
- if (mtu < ip_rt_min_pmtu)
- mtu = ip_rt_min_pmtu;
- if (!peer->pmtu_expires || mtu < peer->pmtu_learned) {
- unsigned long pmtu_expires;
-
- pmtu_expires = jiffies + ip_rt_mtu_expires;
- if (!pmtu_expires)
- pmtu_expires = 1UL;
-
- est_mtu = mtu;
- peer->pmtu_learned = mtu;
- peer->pmtu_expires = pmtu_expires;
- atomic_inc(&__rt_peer_genid);
- }
-
- inet_putpeer(peer);
- }
- return est_mtu ? : new_mtu;
-}
-
static void check_peer_pmtu(struct dst_entry *dst, struct inet_peer *peer)
{
unsigned long expires = ACCESS_ONCE(peer->pmtu_expires);
dst_confirm(dst);
- if (!rt->peer)
- rt_bind_peer(rt, rt->rt_dst, 1);
- peer = rt->peer;
+ peer = rt_get_peer_create(rt, rt->rt_dst);
if (peer) {
unsigned long pmtu_expires = ACCESS_ONCE(peer->pmtu_expires);
}
}
+void ipv4_update_pmtu(struct sk_buff *skb, struct net *net, u32 mtu,
+ int oif, u32 mark, u8 protocol, int flow_flags)
+{
+ const struct iphdr *iph = (const struct iphdr *)skb->data;
+ struct flowi4 fl4;
+ struct rtable *rt;
+
+ flowi4_init_output(&fl4, oif, mark, RT_TOS(iph->tos), RT_SCOPE_UNIVERSE,
+ protocol, flow_flags | FLOWI_FLAG_PRECOW_METRICS,
+ iph->daddr, iph->saddr, 0, 0);
+ rt = __ip_route_output_key(net, &fl4);
+ if (!IS_ERR(rt)) {
+ ip_rt_update_pmtu(&rt->dst, mtu);
+ ip_rt_put(rt);
+ }
+}
+EXPORT_SYMBOL_GPL(ipv4_update_pmtu);
+
+void ipv4_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, u32 mtu)
+{
+ const struct inet_sock *inet = inet_sk(sk);
+
+ return ipv4_update_pmtu(skb, sock_net(sk), mtu,
+ sk->sk_bound_dev_if, sk->sk_mark,
+ inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol,
+ inet_sk_flowi_flags(sk));
+}
+EXPORT_SYMBOL_GPL(ipv4_sk_update_pmtu);
static void ipv4_validate_peer(struct rtable *rt)
{
if (rt->rt_peer_genid != rt_peer_genid()) {
- struct inet_peer *peer;
-
- if (!rt->peer)
- rt_bind_peer(rt, rt->rt_dst, 0);
+ struct inet_peer *peer = rt_get_peer(rt, rt->rt_dst);
- peer = rt->peer;
if (peer) {
check_peer_pmtu(&rt->dst, peer);
static void ipv4_dst_destroy(struct dst_entry *dst)
{
struct rtable *rt = (struct rtable *) dst;
- struct inet_peer *peer = rt->peer;
if (rt->fi) {
fib_info_put(rt->fi);
rt->fi = NULL;
}
- if (peer) {
- rt->peer = NULL;
+ if (rt_has_peer(rt)) {
+ struct inet_peer *peer = rt_peer_ptr(rt);
inet_putpeer(peer);
}
}
icmp_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0);
rt = skb_rtable(skb);
- if (rt && rt->peer && peer_pmtu_cleaned(rt->peer))
- dst_metric_set(&rt->dst, RTAX_MTU, rt->peer->pmtu_orig);
+ if (rt && rt_has_peer(rt)) {
+ struct inet_peer *peer = rt_peer_ptr(rt);
+ if (peer_pmtu_cleaned(peer))
+ dst_metric_set(&rt->dst, RTAX_MTU, peer->pmtu_orig);
+ }
}
static int ip_rt_bug(struct sk_buff *skb)
static void rt_init_metrics(struct rtable *rt, const struct flowi4 *fl4,
struct fib_info *fi)
{
+ struct inet_peer_base *base;
struct inet_peer *peer;
int create = 0;
if (fl4 && (fl4->flowi4_flags & FLOWI_FLAG_PRECOW_METRICS))
create = 1;
- rt->peer = peer = inet_getpeer_v4(rt->rt_dst, create);
+ base = inetpeer_base_ptr(rt->_peer);
+ BUG_ON(!base);
+
+ peer = inet_getpeer_v4(base, rt->rt_dst, create);
if (peer) {
+ __rt_set_peer(rt, peer);
rt->rt_peer_genid = rt_peer_genid();
if (inet_metrics_new(peer))
memcpy(peer->metrics, fi->fib_metrics,
return -EINVAL;
if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
- ipv4_is_loopback(saddr) || skb->protocol != htons(ETH_P_IP))
+ skb->protocol != htons(ETH_P_IP))
goto e_inval;
+ if (likely(!IN_DEV_ROUTE_LOCALNET(in_dev)))
+ if (ipv4_is_loopback(saddr))
+ goto e_inval;
+
if (ipv4_is_zeronet(saddr)) {
if (!ipv4_is_local_multicast(daddr))
goto e_inval;
rth->rt_gateway = daddr;
rth->rt_spec_dst= spec_dst;
rth->rt_peer_genid = 0;
- rth->peer = NULL;
+ rt_init_peer(rth, dev_net(dev)->ipv4.peers);
rth->fi = NULL;
if (our) {
rth->dst.input= ip_local_deliver;
rth->rt_gateway = daddr;
rth->rt_spec_dst= spec_dst;
rth->rt_peer_genid = 0;
- rth->peer = NULL;
+ rt_init_peer(rth, &res->table->tb_peers);
rth->fi = NULL;
rth->dst.input = ip_forward;
by fib_lookup.
*/
- if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
- ipv4_is_loopback(saddr))
+ if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr))
goto martian_source;
if (ipv4_is_lbcast(daddr) || (saddr == 0 && daddr == 0))
if (ipv4_is_zeronet(saddr))
goto martian_source;
- if (ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr))
+ if (ipv4_is_zeronet(daddr))
goto martian_destination;
+ if (likely(!IN_DEV_ROUTE_LOCALNET(in_dev))) {
+ if (ipv4_is_loopback(daddr))
+ goto martian_destination;
+
+ if (ipv4_is_loopback(saddr))
+ goto martian_source;
+ }
+
/*
* Now we are ready to route packet.
*/
rth->rt_gateway = daddr;
rth->rt_spec_dst= spec_dst;
rth->rt_peer_genid = 0;
- rth->peer = NULL;
+ rt_init_peer(rth, net->ipv4.peers);
rth->fi = NULL;
if (res.type == RTN_UNREACHABLE) {
rth->dst.input= ip_error;
u16 type = res->type;
struct rtable *rth;
- if (ipv4_is_loopback(fl4->saddr) && !(dev_out->flags & IFF_LOOPBACK))
+ in_dev = __in_dev_get_rcu(dev_out);
+ if (!in_dev)
return ERR_PTR(-EINVAL);
+ if (likely(!IN_DEV_ROUTE_LOCALNET(in_dev)))
+ if (ipv4_is_loopback(fl4->saddr) && !(dev_out->flags & IFF_LOOPBACK))
+ return ERR_PTR(-EINVAL);
+
if (ipv4_is_lbcast(fl4->daddr))
type = RTN_BROADCAST;
else if (ipv4_is_multicast(fl4->daddr))
if (dev_out->flags & IFF_LOOPBACK)
flags |= RTCF_LOCAL;
- in_dev = __in_dev_get_rcu(dev_out);
- if (!in_dev)
- return ERR_PTR(-EINVAL);
-
if (type == RTN_BROADCAST) {
flags |= RTCF_BROADCAST | RTCF_LOCAL;
fi = NULL;
rth->rt_gateway = fl4->daddr;
rth->rt_spec_dst= fl4->saddr;
rth->rt_peer_genid = 0;
- rth->peer = NULL;
+ rt_init_peer(rth, (res->table ?
+ &res->table->tb_peers :
+ dev_net(dev_out)->ipv4.peers));
rth->fi = NULL;
RT_CACHE_STAT_INC(out_slow_tot);
int orig_oif;
res.fi = NULL;
+ res.table = NULL;
#ifdef CONFIG_IP_MULTIPLE_TABLES
res.r = NULL;
#endif
if (fib_lookup(net, fl4, &res)) {
res.fi = NULL;
+ res.table = NULL;
if (fl4->flowi4_oif) {
/* Apparently, routing tables are wrong. Assume,
that the destination is on link.
rt->rt_src = ort->rt_src;
rt->rt_gateway = ort->rt_gateway;
rt->rt_spec_dst = ort->rt_spec_dst;
- rt->peer = ort->peer;
- if (rt->peer)
- atomic_inc(&rt->peer->refcnt);
+ rt_transfer_peer(rt, ort);
rt->fi = ort->fi;
if (rt->fi)
atomic_inc(&rt->fi->fib_clntref);
struct rtmsg *r;
struct nlmsghdr *nlh;
unsigned long expires = 0;
- const struct inet_peer *peer = rt->peer;
u32 id = 0, ts = 0, tsage = 0, error;
nlh = nlmsg_put(skb, pid, seq, event, sizeof(*r), flags);
goto nla_put_failure;
error = rt->dst.error;
- if (peer) {
- inet_peer_refcheck(rt->peer);
+ if (rt_has_peer(rt)) {
+ const struct inet_peer *peer = rt_peer_ptr(rt);
+ inet_peer_refcheck(peer);
id = atomic_read(&peer->ip_id_count) & 0xffff;
if (peer->tcp_ts_stamp) {
ts = peer->tcp_ts;
.init = rt_genid_init,
};
+static int __net_init ipv4_inetpeer_init(struct net *net)
+{
+ struct inet_peer_base *bp = kmalloc(sizeof(*bp), GFP_KERNEL);
+
+ if (!bp)
+ return -ENOMEM;
+ inet_peer_base_init(bp);
+ net->ipv4.peers = bp;
+ return 0;
+}
+
+static void __net_exit ipv4_inetpeer_exit(struct net *net)
+{
+ struct inet_peer_base *bp = net->ipv4.peers;
+
+ net->ipv4.peers = NULL;
+ inetpeer_invalidate_tree(bp);
+ kfree(bp);
+}
+
+static __net_initdata struct pernet_operations ipv4_inetpeer_ops = {
+ .init = ipv4_inetpeer_init,
+ .exit = ipv4_inetpeer_exit,
+};
#ifdef CONFIG_IP_ROUTE_CLASSID
struct ip_rt_acct __percpu *ip_rt_acct __read_mostly;
register_pernet_subsys(&sysctl_route_ops);
#endif
register_pernet_subsys(&rt_genid_ops);
+ register_pernet_subsys(&ipv4_inetpeer_ops);
return rc;
}
projects / deliverable / linux.git / blobdiff