Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:

 1) BPF debugger and asm tool by Daniel Borkmann.

 2) Speed up create/bind in AF_PACKET, also from Daniel Borkmann.

 3) Correct reciprocal_divide and update users, from Hannes Frederic
    Sowa and Daniel Borkmann.

 4) Currently we only have a "set" operation for the hw timestamp socket
    ioctl, add a "get" operation to match.  From Ben Hutchings.

 5) Add better trace events for debugging driver datapath problems, also
    from Ben Hutchings.

 6) Implement auto corking in TCP, from Eric Dumazet.  Basically, if we
    have a small send and a previous packet is already in the qdisc or
    device queue, defer until TX completion or we get more data.

 7) Allow userspace to manage ipv6 temporary addresses, from Jiri Pirko.

 8) Add a qdisc bypass option for AF_PACKET sockets, from Daniel
    Borkmann.

 9) Share IP header compression code between Bluetooth and IEEE802154
    layers, from Jukka Rissanen.

10) Fix ipv6 router reachability probing, from Jiri Benc.

11) Allow packets to be captured on macvtap devices, from Vlad Yasevich.

12) Support tunneling in GRO layer, from Jerry Chu.

13) Allow bonding to be configured fully using netlink, from Scott
    Feldman.

14) Allow AF_PACKET users to obtain the VLAN TPID, just like they can
    already get the TCI.  From Atzm Watanabe.

15) New "Heavy Hitter" qdisc, from Terry Lam.

16) Significantly improve the IPSEC support in pktgen, from Fan Du.

17) Allow ipv4 tunnels to cache routes, just like sockets.  From Tom
    Herbert.

18) Add Proportional Integral Enhanced packet scheduler, from Vijay
    Subramanian.

19) Allow openvswitch to mmap'd netlink, from Thomas Graf.

20) Key TCP metrics blobs also by source address, not just destination
    address.  From Christoph Paasch.

21) Support 10G in generic phylib.  From Andy Fleming.

22) Try to short-circuit GRO flow compares using device provided RX
    hash, if provided.  From Tom Herbert.

The wireless and netfilter folks have been busy little bees too.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2064 commits)
  net/cxgb4: Fix referencing freed adapter
  ipv6: reallocate addrconf router for ipv6 address when lo device up
  fib_frontend: fix possible NULL pointer dereference
  rtnetlink: remove IFLA_BOND_SLAVE definition
  rtnetlink: remove check for fill_slave_info in rtnl_have_link_slave_info
  qlcnic: update version to 5.3.55
  qlcnic: Enhance logic to calculate msix vectors.
  qlcnic: Refactor interrupt coalescing code for all adapters.
  qlcnic: Update poll controller code path
  qlcnic: Interrupt code cleanup
  qlcnic: Enhance Tx timeout debugging.
  qlcnic: Use bool for rx_mac_learn.
  bonding: fix u64 division
  rtnetlink: add missing IFLA_BOND_AD_INFO_UNSPEC
  sfc: Use the correct maximum TX DMA ring size for SFC9100
  Add Shradha Shah as the sfc driver maintainer.
  net/vxlan: Share RX skb de-marking and checksum checks with ovs
  tulip: cleanup by using ARRAY_SIZE()
  ip_tunnel: clear IPCB in ip_tunnel_xmit() in case dst_link_failure() is called
  net/cxgb4: Don't retrieve stats during recovery
  ...

1 files changed, 41 insertions, 25 deletions

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index e6f931997996..ef02b26ccf81 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -321,6 +321,27 @@ static inline int ip6_forward_finish(struct sk_buff *skb)
 	return dst_output(skb);
 }
 
+static unsigned int ip6_dst_mtu_forward(const struct dst_entry *dst)
+{
+	unsigned int mtu;
+	struct inet6_dev *idev;
+
+	if (dst_metric_locked(dst, RTAX_MTU)) {
+		mtu = dst_metric_raw(dst, RTAX_MTU);
+		if (mtu)
+			return mtu;
+	}
+
+	mtu = IPV6_MIN_MTU;
+	rcu_read_lock();
+	idev = __in6_dev_get(dst->dev);
+	if (idev)
+		mtu = idev->cnf.mtu6;
+	rcu_read_unlock();
+
+	return mtu;
+}
+
 int ip6_forward(struct sk_buff *skb)
 {
 	struct dst_entry *dst = skb_dst(skb);
@@ -336,7 +357,8 @@ int ip6_forward(struct sk_buff *skb)
 		goto drop;
 
 	if (!xfrm6_policy_check(NULL, XFRM_POLICY_FWD, skb)) {
-		IP6_INC_STATS(net, ip6_dst_idev(dst), IPSTATS_MIB_INDISCARDS);
+		IP6_INC_STATS_BH(net, ip6_dst_idev(dst),
+				 IPSTATS_MIB_INDISCARDS);
 		goto drop;
 	}
 
@@ -370,8 +392,8 @@ int ip6_forward(struct sk_buff *skb)
 		/* Force OUTPUT device used as source address */
 		skb->dev = dst->dev;
 		icmpv6_send(skb, ICMPV6_TIME_EXCEED, ICMPV6_EXC_HOPLIMIT, 0);
-		IP6_INC_STATS_BH(net,
-				 ip6_dst_idev(dst), IPSTATS_MIB_INHDRERRORS);
+		IP6_INC_STATS_BH(net, ip6_dst_idev(dst),
+				 IPSTATS_MIB_INHDRERRORS);
 
 		kfree_skb(skb);
 		return -ETIMEDOUT;
@@ -384,14 +406,15 @@ int ip6_forward(struct sk_buff *skb)
 		if (proxied > 0)
 			return ip6_input(skb);
 		else if (proxied < 0) {
-			IP6_INC_STATS(net, ip6_dst_idev(dst),
-				      IPSTATS_MIB_INDISCARDS);
+			IP6_INC_STATS_BH(net, ip6_dst_idev(dst),
+					 IPSTATS_MIB_INDISCARDS);
 			goto drop;
 		}
 	}
 
 	if (!xfrm6_route_forward(skb)) {
-		IP6_INC_STATS(net, ip6_dst_idev(dst), IPSTATS_MIB_INDISCARDS);
+		IP6_INC_STATS_BH(net, ip6_dst_idev(dst),
+				 IPSTATS_MIB_INDISCARDS);
 		goto drop;
 	}
 	dst = skb_dst(skb);
@@ -439,7 +462,7 @@ int ip6_forward(struct sk_buff *skb)
 		}
 	}
 
-	mtu = dst_mtu(dst);
+	mtu = ip6_dst_mtu_forward(dst);
 	if (mtu < IPV6_MIN_MTU)
 		mtu = IPV6_MIN_MTU;
 
@@ -448,16 +471,17 @@ int ip6_forward(struct sk_buff *skb)
 		/* Again, force OUTPUT device used as source address */
 		skb->dev = dst->dev;
 		icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
-		IP6_INC_STATS_BH(net,
-				 ip6_dst_idev(dst), IPSTATS_MIB_INTOOBIGERRORS);
-		IP6_INC_STATS_BH(net,
-				 ip6_dst_idev(dst), IPSTATS_MIB_FRAGFAILS);
+		IP6_INC_STATS_BH(net, ip6_dst_idev(dst),
+				 IPSTATS_MIB_INTOOBIGERRORS);
+		IP6_INC_STATS_BH(net, ip6_dst_idev(dst),
+				 IPSTATS_MIB_FRAGFAILS);
 		kfree_skb(skb);
 		return -EMSGSIZE;
 	}
 
 	if (skb_cow(skb, dst->dev->hard_header_len)) {
-		IP6_INC_STATS(net, ip6_dst_idev(dst), IPSTATS_MIB_OUTDISCARDS);
+		IP6_INC_STATS_BH(net, ip6_dst_idev(dst),
+				 IPSTATS_MIB_OUTDISCARDS);
 		goto drop;
 	}
 
@@ -938,7 +962,6 @@ EXPORT_SYMBOL_GPL(ip6_dst_lookup);
  *	@sk: socket which provides route info
  *	@fl6: flow to lookup
  *	@final_dst: final destination address for ipsec lookup
- *	@can_sleep: we are in a sleepable context
  *
  *	This function performs a route lookup on the given flow.
  *
@@ -946,8 +969,7 @@ EXPORT_SYMBOL_GPL(ip6_dst_lookup);
  *	error code.
  */
 struct dst_entry *ip6_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
-				      const struct in6_addr *final_dst,
-				      bool can_sleep)
+				      const struct in6_addr *final_dst)
 {
 	struct dst_entry *dst = NULL;
 	int err;
@@ -957,8 +979,6 @@ struct dst_entry *ip6_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
 		return ERR_PTR(err);
 	if (final_dst)
 		fl6->daddr = *final_dst;
-	if (can_sleep)
-		fl6->flowi6_flags |= FLOWI_FLAG_CAN_SLEEP;
 
 	return xfrm_lookup(sock_net(sk), dst, flowi6_to_flowi(fl6), sk, 0);
 }
@@ -969,7 +989,6 @@ EXPORT_SYMBOL_GPL(ip6_dst_lookup_flow);
  *	@sk: socket which provides the dst cache and route info
  *	@fl6: flow to lookup
  *	@final_dst: final destination address for ipsec lookup
- *	@can_sleep: we are in a sleepable context
  *
  *	This function performs a route lookup on the given flow with the
  *	possibility of using the cached route in the socket if it is valid.
@@ -980,8 +999,7 @@ EXPORT_SYMBOL_GPL(ip6_dst_lookup_flow);
  *	error code.
  */
 struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
-					 const struct in6_addr *final_dst,
-					 bool can_sleep)
+					 const struct in6_addr *final_dst)
 {
 	struct dst_entry *dst = sk_dst_check(sk, inet6_sk(sk)->dst_cookie);
 	int err;
@@ -993,8 +1011,6 @@ struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
 		return ERR_PTR(err);
 	if (final_dst)
 		fl6->daddr = *final_dst;
-	if (can_sleep)
-		fl6->flowi6_flags |= FLOWI_FLAG_CAN_SLEEP;
 
 	return xfrm_lookup(sock_net(sk), dst, flowi6_to_flowi(fl6), sk, 0);
 }
@@ -1162,10 +1178,10 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 		np->cork.hop_limit = hlimit;
 		np->cork.tclass = tclass;
 		if (rt->dst.flags & DST_XFRM_TUNNEL)
-			mtu = np->pmtudisc == IPV6_PMTUDISC_PROBE ?
+			mtu = np->pmtudisc >= IPV6_PMTUDISC_PROBE ?
 			      rt->dst.dev->mtu : dst_mtu(&rt->dst);
 		else
-			mtu = np->pmtudisc == IPV6_PMTUDISC_PROBE ?
+			mtu = np->pmtudisc >= IPV6_PMTUDISC_PROBE ?
 			      rt->dst.dev->mtu : dst_mtu(rt->dst.path);
 		if (np->frag_size < mtu) {
 			if (np->frag_size)
@@ -1285,7 +1301,7 @@ alloc_new_skb:
 			if (skb == NULL || skb_prev == NULL)
 				ip6_append_data_mtu(&mtu, &maxfraglen,
 						    fragheaderlen, skb, rt,
-						    np->pmtudisc ==
+						    np->pmtudisc >=
 						    IPV6_PMTUDISC_PROBE);
 
 			skb_prev = skb;