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

Pull networking updates from David Miller:

 1) More iov_iter conversion work from Al Viro.

    [ The "crypto: switch af_alg_make_sg() to iov_iter" commit was
      wrong, and this pull actually adds an extra commit on top of the
      branch I'm pulling to fix that up, so that the pre-merge state is
      ok.   - Linus ]

 2) Various optimizations to the ipv4 forwarding information base trie
    lookup implementation.  From Alexander Duyck.

 3) Remove sock_iocb altogether, from CHristoph Hellwig.

 4) Allow congestion control algorithm selection via routing metrics.
    From Daniel Borkmann.

 5) Make ipv4 uncached route list per-cpu, from Eric Dumazet.

 6) Handle rfs hash collisions more gracefully, also from Eric Dumazet.

 7) Add xmit_more support to r8169, e1000, and e1000e drivers.  From
    Florian Westphal.

 8) Transparent Ethernet Bridging support for GRO, from Jesse Gross.

 9) Add BPF packet actions to packet scheduler, from Jiri Pirko.

10) Add support for uniqu flow IDs to openvswitch, from Joe Stringer.

11) New NetCP ethernet driver, from Muralidharan Karicheri and Wingman
    Kwok.

12) More sanely handle out-of-window dupacks, which can result in
    serious ACK storms.  From Neal Cardwell.

13) Various rhashtable bug fixes and enhancements, from Herbert Xu,
    Patrick McHardy, and Thomas Graf.

14) Support xmit_more in be2net, from Sathya Perla.

15) Group Policy extensions for vxlan, from Thomas Graf.

16) Remove Checksum Offload support for vxlan, from Tom Herbert.

17) Like ipv4, support lockless transmit over ipv6 UDP sockets.  From
    Vlad Yasevich.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1494+1 commits)
  crypto: fix af_alg_make_sg() conversion to iov_iter
  ipv4: Namespecify TCP PMTU mechanism
  i40e: Fix for stats init function call in Rx setup
  tcp: don't include Fast Open option in SYN-ACK on pure SYN-data
  openvswitch: Only set TUNNEL_VXLAN_OPT if VXLAN-GBP metadata is set
  ipv6: Make __ipv6_select_ident static
  ipv6: Fix fragment id assignment on LE arches.
  bridge: Fix inability to add non-vlan fdb entry
  net: Mellanox: Delete unnecessary checks before the function call "vunmap"
  cxgb4: Add support in cxgb4 to get expansion rom version via ethtool
  ethtool: rename reserved1 memeber in ethtool_drvinfo for expansion ROM version
  net: dsa: Remove redundant phy_attach()
  IB/mlx4: Reset flow support for IB kernel ULPs
  IB/mlx4: Always use the correct port for mirrored multicast attachments
  net/bonding: Fix potential bad memory access during bonding events
  tipc: remove tipc_snprintf
  tipc: nl compat add noop and remove legacy nl framework
  tipc: convert legacy nl stats show to nl compat
  tipc: convert legacy nl net id get to nl compat
  tipc: convert legacy nl net id set to nl compat
  ...

1 files changed, 171 insertions, 0 deletions

diff --git a/net/ieee802154/6lowpan/rx.c b/net/ieee802154/6lowpan/rx.c
new file mode 100644
index 000000000000..4be1d289ab2d
--- /dev/null
+++ b/net/ieee802154/6lowpan/rx.c
@@ -0,0 +1,171 @@
+/* This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/if_arp.h>
+
+#include <net/6lowpan.h>
+#include <net/ieee802154_netdev.h>
+
+#include "6lowpan_i.h"
+
+static int lowpan_give_skb_to_devices(struct sk_buff *skb,
+				      struct net_device *dev)
+{
+	struct lowpan_dev_record *entry;
+	struct sk_buff *skb_cp;
+	int stat = NET_RX_SUCCESS;
+
+	skb->protocol = htons(ETH_P_IPV6);
+	skb->pkt_type = PACKET_HOST;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(entry, &lowpan_devices, list)
+		if (lowpan_dev_info(entry->ldev)->real_dev == skb->dev) {
+			skb_cp = skb_copy(skb, GFP_ATOMIC);
+			if (!skb_cp) {
+				kfree_skb(skb);
+				rcu_read_unlock();
+				return NET_RX_DROP;
+			}
+
+			skb_cp->dev = entry->ldev;
+			stat = netif_rx(skb_cp);
+			if (stat == NET_RX_DROP)
+				break;
+		}
+	rcu_read_unlock();
+
+	consume_skb(skb);
+
+	return stat;
+}
+
+static int
+iphc_decompress(struct sk_buff *skb, const struct ieee802154_hdr *hdr)
+{
+	u8 iphc0, iphc1;
+	struct ieee802154_addr_sa sa, da;
+	void *sap, *dap;
+
+	raw_dump_table(__func__, "raw skb data dump", skb->data, skb->len);
+	/* at least two bytes will be used for the encoding */
+	if (skb->len < 2)
+		return -EINVAL;
+
+	if (lowpan_fetch_skb_u8(skb, &iphc0))
+		return -EINVAL;
+
+	if (lowpan_fetch_skb_u8(skb, &iphc1))
+		return -EINVAL;
+
+	ieee802154_addr_to_sa(&sa, &hdr->source);
+	ieee802154_addr_to_sa(&da, &hdr->dest);
+
+	if (sa.addr_type == IEEE802154_ADDR_SHORT)
+		sap = &sa.short_addr;
+	else
+		sap = &sa.hwaddr;
+
+	if (da.addr_type == IEEE802154_ADDR_SHORT)
+		dap = &da.short_addr;
+	else
+		dap = &da.hwaddr;
+
+	return lowpan_header_decompress(skb, skb->dev, sap, sa.addr_type,
+					IEEE802154_ADDR_LEN, dap, da.addr_type,
+					IEEE802154_ADDR_LEN, iphc0, iphc1);
+}
+
+static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev,
+		      struct packet_type *pt, struct net_device *orig_dev)
+{
+	struct ieee802154_hdr hdr;
+	int ret;
+
+	skb = skb_share_check(skb, GFP_ATOMIC);
+	if (!skb)
+		goto drop;
+
+	if (!netif_running(dev))
+		goto drop_skb;
+
+	if (skb->pkt_type == PACKET_OTHERHOST)
+		goto drop_skb;
+
+	if (dev->type != ARPHRD_IEEE802154)
+		goto drop_skb;
+
+	if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0)
+		goto drop_skb;
+
+	/* check that it's our buffer */
+	if (skb->data[0] == LOWPAN_DISPATCH_IPV6) {
+		/* Pull off the 1-byte of 6lowpan header. */
+		skb_pull(skb, 1);
+		return lowpan_give_skb_to_devices(skb, NULL);
+	} else {
+		switch (skb->data[0] & 0xe0) {
+		case LOWPAN_DISPATCH_IPHC:	/* ipv6 datagram */
+			ret = iphc_decompress(skb, &hdr);
+			if (ret < 0)
+				goto drop_skb;
+
+			return lowpan_give_skb_to_devices(skb, NULL);
+		case LOWPAN_DISPATCH_FRAG1:	/* first fragment header */
+			ret = lowpan_frag_rcv(skb, LOWPAN_DISPATCH_FRAG1);
+			if (ret == 1) {
+				ret = iphc_decompress(skb, &hdr);
+				if (ret < 0)
+					goto drop_skb;
+
+				return lowpan_give_skb_to_devices(skb, NULL);
+			} else if (ret == -1) {
+				return NET_RX_DROP;
+			} else {
+				return NET_RX_SUCCESS;
+			}
+		case LOWPAN_DISPATCH_FRAGN:	/* next fragments headers */
+			ret = lowpan_frag_rcv(skb, LOWPAN_DISPATCH_FRAGN);
+			if (ret == 1) {
+				ret = iphc_decompress(skb, &hdr);
+				if (ret < 0)
+					goto drop_skb;
+
+				return lowpan_give_skb_to_devices(skb, NULL);
+			} else if (ret == -1) {
+				return NET_RX_DROP;
+			} else {
+				return NET_RX_SUCCESS;
+			}
+		default:
+			break;
+		}
+	}
+
+drop_skb:
+	kfree_skb(skb);
+drop:
+	return NET_RX_DROP;
+}
+
+static struct packet_type lowpan_packet_type = {
+	.type = htons(ETH_P_IEEE802154),
+	.func = lowpan_rcv,
+};
+
+void lowpan_rx_init(void)
+{
+	dev_add_pack(&lowpan_packet_type);
+}
+
+void lowpan_rx_exit(void)
+{
+	dev_remove_pack(&lowpan_packet_type);
+}