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

Pull networking updates from David Miller:
 "Highlights (1721 non-merge commits, this has to be a record of some
  sort):

   1) Add 'random' mode to team driver, from Jiri Pirko and Eric
      Dumazet.

   2) Make it so that any driver that supports configuration of multiple
      MAC addresses can provide the forwarding database add and del
      calls by providing a default implementation and hooking that up if
      the driver doesn't have an explicit set of handlers.  From Vlad
      Yasevich.

   3) Support GSO segmentation over tunnels and other encapsulating
      devices such as VXLAN, from Pravin B Shelar.

   4) Support L2 GRE tunnels in the flow dissector, from Michael Dalton.

   5) Implement Tail Loss Probe (TLP) detection in TCP, from Nandita
      Dukkipati.

   6) In the PHY layer, allow supporting wake-on-lan in situations where
      the PHY registers have to be written for it to be configured.

      Use it to support wake-on-lan in mv643xx_eth.

      From Michael Stapelberg.

   7) Significantly improve firewire IPV6 support, from YOSHIFUJI
      Hideaki.

   8) Allow multiple packets to be sent in a single transmission using
      network coding in batman-adv, from Martin Hundebøll.

   9) Add support for T5 cxgb4 chips, from Santosh Rastapur.

  10) Generalize the VXLAN forwarding tables so that there is more
      flexibility in configurating various aspects of the endpoints.
      From David Stevens.

  11) Support RSS and TSO in hardware over GRE tunnels in bxn2x driver,
      from Dmitry Kravkov.

  12) Zero copy support in nfnelink_queue, from Eric Dumazet and Pablo
      Neira Ayuso.

  13) Start adding networking selftests.

  14) In situations of overload on the same AF_PACKET fanout socket, or
      per-cpu packet receive queue, minimize drop by distributing the
      load to other cpus/fanouts.  From Willem de Bruijn and Eric
      Dumazet.

  15) Add support for new payload offset BPF instruction, from Daniel
      Borkmann.

  16) Convert several drivers over to mdoule_platform_driver(), from
      Sachin Kamat.

  17) Provide a minimal BPF JIT image disassembler userspace tool, from
      Daniel Borkmann.

  18) Rewrite F-RTO implementation in TCP to match the final
      specification of it in RFC4138 and RFC5682.  From Yuchung Cheng.

  19) Provide netlink socket diag of netlink sockets ("Yo dawg, I hear
      you like netlink, so I implemented netlink dumping of netlink
      sockets.") From Andrey Vagin.

  20) Remove ugly passing of rtnetlink attributes into rtnl_doit
      functions, from Thomas Graf.

  21) Allow userspace to be able to see if a configuration change occurs
      in the middle of an address or device list dump, from Nicolas
      Dichtel.

  22) Support RFC3168 ECN protection for ipv6 fragments, from Hannes
      Frederic Sowa.

  23) Increase accuracy of packet length used by packet scheduler, from
      Jason Wang.

  24) Beginning set of changes to make ipv4/ipv6 fragment handling more
      scalable and less susceptible to overload and locking contention,
      from Jesper Dangaard Brouer.

  25) Get rid of using non-type-safe NLMSG_* macros and use nlmsg_*()
      instead.  From Hong Zhiguo.

  26) Optimize route usage in IPVS by avoiding reference counting where
      possible, from Julian Anastasov.

  27) Convert IPVS schedulers to RCU, also from Julian Anastasov.

  28) Support cpu fanouts in xt_NFQUEUE netfilter target, from Holger
      Eitzenberger.

  29) Network namespace support for nf_log, ebt_log, xt_LOG, ipt_ULOG,
      nfnetlink_log, and nfnetlink_queue.  From Gao feng.

  30) Implement RFC3168 ECN protection, from Hannes Frederic Sowa.

  31) Support several new r8169 chips, from Hayes Wang.

  32) Support tokenized interface identifiers in ipv6, from Daniel
      Borkmann.

  33) Use usbnet_link_change() helper in USB net driver, from Ming Lei.

  34) Add 802.1ad vlan offload support, from Patrick McHardy.

  35) Support mmap() based netlink communication, also from Patrick
      McHardy.

  36) Support HW timestamping in mlx4 driver, from Amir Vadai.

  37) Rationalize AF_PACKET packet timestamping when transmitting, from
      Willem de Bruijn and Daniel Borkmann.

  38) Bring parity to what's provided by /proc/net/packet socket dumping
      and the info provided by netlink socket dumping of AF_PACKET
      sockets.  From Nicolas Dichtel.

  39) Fix peeking beyond zero sized SKBs in AF_UNIX, from Benjamin
      Poirier"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1722 commits)
  filter: fix va_list build error
  af_unix: fix a fatal race with bit fields
  bnx2x: Prevent memory leak when cnic is absent
  bnx2x: correct reading of speed capabilities
  net: sctp: attribute printl with __printf for gcc fmt checks
  netlink: kconfig: move mmap i/o into netlink kconfig
  netpoll: convert mutex into a semaphore
  netlink: Fix skb ref counting.
  net_sched: act_ipt forward compat with xtables
  mlx4_en: fix a build error on 32bit arches
  Revert "bnx2x: allow nvram test to run when device is down"
  bridge: avoid OOPS if root port not found
  drivers: net: cpsw: fix kernel warn on cpsw irq enable
  sh_eth: use random MAC address if no valid one supplied
  3c509.c: call SET_NETDEV_DEV for all device types (ISA/ISAPnP/EISA)
  tg3: fix to append hardware time stamping flags
  unix/stream: fix peeking with an offset larger than data in queue
  unix/dgram: fix peeking with an offset larger than data in queue
  unix/dgram: peek beyond 0-sized skbs
  openvswitch: Remove unneeded ovs_netdev_get_ifindex()
  ...

1 files changed, 387 insertions, 0 deletions

diff --git a/net/tipc/ib_media.c b/net/tipc/ib_media.c
new file mode 100644
index 000000000000..2a2864c25e15
--- /dev/null
+++ b/net/tipc/ib_media.c
@@ -0,0 +1,387 @@
+/*
+ * net/tipc/ib_media.c: Infiniband bearer support for TIPC
+ *
+ * Copyright (c) 2013 Patrick McHardy <kaber@trash.net>
+ *
+ * Based on eth_media.c, which carries the following copyright notice:
+ *
+ * Copyright (c) 2001-2007, Ericsson AB
+ * Copyright (c) 2005-2008, 2011, Wind River Systems
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the names of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/if_infiniband.h>
+#include "core.h"
+#include "bearer.h"
+
+#define MAX_IB_BEARERS		MAX_BEARERS
+
+/**
+ * struct ib_bearer - Infiniband bearer data structure
+ * @bearer: ptr to associated "generic" bearer structure
+ * @dev: ptr to associated Infiniband network device
+ * @tipc_packet_type: used in binding TIPC to Infiniband driver
+ * @cleanup: work item used when disabling bearer
+ */
+
+struct ib_bearer {
+	struct tipc_bearer *bearer;
+	struct net_device *dev;
+	struct packet_type tipc_packet_type;
+	struct work_struct setup;
+	struct work_struct cleanup;
+};
+
+static struct tipc_media ib_media_info;
+static struct ib_bearer ib_bearers[MAX_IB_BEARERS];
+static int ib_started;
+
+/**
+ * ib_media_addr_set - initialize Infiniband media address structure
+ *
+ * Media-dependent "value" field stores MAC address in first 6 bytes
+ * and zeroes out the remaining bytes.
+ */
+static void ib_media_addr_set(const struct tipc_bearer *tb_ptr,
+			      struct tipc_media_addr *a, char *mac)
+{
+	BUILD_BUG_ON(sizeof(a->value) < INFINIBAND_ALEN);
+	memcpy(a->value, mac, INFINIBAND_ALEN);
+	a->media_id = TIPC_MEDIA_TYPE_IB;
+	a->broadcast = !memcmp(mac, tb_ptr->bcast_addr.value, INFINIBAND_ALEN);
+}
+
+/**
+ * send_msg - send a TIPC message out over an InfiniBand interface
+ */
+static int send_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr,
+		    struct tipc_media_addr *dest)
+{
+	struct sk_buff *clone;
+	struct net_device *dev;
+	int delta;
+
+	clone = skb_clone(buf, GFP_ATOMIC);
+	if (!clone)
+		return 0;
+
+	dev = ((struct ib_bearer *)(tb_ptr->usr_handle))->dev;
+	delta = dev->hard_header_len - skb_headroom(buf);
+
+	if ((delta > 0) &&
+	    pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
+		kfree_skb(clone);
+		return 0;
+	}
+
+	skb_reset_network_header(clone);
+	clone->dev = dev;
+	clone->protocol = htons(ETH_P_TIPC);
+	dev_hard_header(clone, dev, ETH_P_TIPC, dest->value,
+			dev->dev_addr, clone->len);
+	dev_queue_xmit(clone);
+	return 0;
+}
+
+/**
+ * recv_msg - handle incoming TIPC message from an InfiniBand interface
+ *
+ * Accept only packets explicitly sent to this node, or broadcast packets;
+ * ignores packets sent using InfiniBand multicast, and traffic sent to other
+ * nodes (which can happen if interface is running in promiscuous mode).
+ */
+static int recv_msg(struct sk_buff *buf, struct net_device *dev,
+		    struct packet_type *pt, struct net_device *orig_dev)
+{
+	struct ib_bearer *ib_ptr = (struct ib_bearer *)pt->af_packet_priv;
+
+	if (!net_eq(dev_net(dev), &init_net)) {
+		kfree_skb(buf);
+		return 0;
+	}
+
+	if (likely(ib_ptr->bearer)) {
+		if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
+			buf->next = NULL;
+			tipc_recv_msg(buf, ib_ptr->bearer);
+			return 0;
+		}
+	}
+	kfree_skb(buf);
+	return 0;
+}
+
+/**
+ * setup_bearer - setup association between InfiniBand bearer and interface
+ */
+static void setup_bearer(struct work_struct *work)
+{
+	struct ib_bearer *ib_ptr =
+		container_of(work, struct ib_bearer, setup);
+
+	dev_add_pack(&ib_ptr->tipc_packet_type);
+}
+
+/**
+ * enable_bearer - attach TIPC bearer to an InfiniBand interface
+ */
+static int enable_bearer(struct tipc_bearer *tb_ptr)
+{
+	struct net_device *dev = NULL;
+	struct net_device *pdev = NULL;
+	struct ib_bearer *ib_ptr = &ib_bearers[0];
+	struct ib_bearer *stop = &ib_bearers[MAX_IB_BEARERS];
+	char *driver_name = strchr((const char *)tb_ptr->name, ':') + 1;
+	int pending_dev = 0;
+
+	/* Find unused InfiniBand bearer structure */
+	while (ib_ptr->dev) {
+		if (!ib_ptr->bearer)
+			pending_dev++;
+		if (++ib_ptr == stop)
+			return pending_dev ? -EAGAIN : -EDQUOT;
+	}
+
+	/* Find device with specified name */
+	read_lock(&dev_base_lock);
+	for_each_netdev(&init_net, pdev) {
+		if (!strncmp(pdev->name, driver_name, IFNAMSIZ)) {
+			dev = pdev;
+			dev_hold(dev);
+			break;
+		}
+	}
+	read_unlock(&dev_base_lock);
+	if (!dev)
+		return -ENODEV;
+
+	/* Create InfiniBand bearer for device */
+	ib_ptr->dev = dev;
+	ib_ptr->tipc_packet_type.type = htons(ETH_P_TIPC);
+	ib_ptr->tipc_packet_type.dev = dev;
+	ib_ptr->tipc_packet_type.func = recv_msg;
+	ib_ptr->tipc_packet_type.af_packet_priv = ib_ptr;
+	INIT_LIST_HEAD(&(ib_ptr->tipc_packet_type.list));
+	INIT_WORK(&ib_ptr->setup, setup_bearer);
+	schedule_work(&ib_ptr->setup);
+
+	/* Associate TIPC bearer with InfiniBand bearer */
+	ib_ptr->bearer = tb_ptr;
+	tb_ptr->usr_handle = (void *)ib_ptr;
+	memset(tb_ptr->bcast_addr.value, 0, sizeof(tb_ptr->bcast_addr.value));
+	memcpy(tb_ptr->bcast_addr.value, dev->broadcast, INFINIBAND_ALEN);
+	tb_ptr->bcast_addr.media_id = TIPC_MEDIA_TYPE_IB;
+	tb_ptr->bcast_addr.broadcast = 1;
+	tb_ptr->mtu = dev->mtu;
+	tb_ptr->blocked = 0;
+	ib_media_addr_set(tb_ptr, &tb_ptr->addr, (char *)dev->dev_addr);
+	return 0;
+}
+
+/**
+ * cleanup_bearer - break association between InfiniBand bearer and interface
+ *
+ * This routine must be invoked from a work queue because it can sleep.
+ */
+static void cleanup_bearer(struct work_struct *work)
+{
+	struct ib_bearer *ib_ptr =
+		container_of(work, struct ib_bearer, cleanup);
+
+	dev_remove_pack(&ib_ptr->tipc_packet_type);
+	dev_put(ib_ptr->dev);
+	ib_ptr->dev = NULL;
+}
+
+/**
+ * disable_bearer - detach TIPC bearer from an InfiniBand interface
+ *
+ * Mark InfiniBand bearer as inactive so that incoming buffers are thrown away,
+ * then get worker thread to complete bearer cleanup.  (Can't do cleanup
+ * here because cleanup code needs to sleep and caller holds spinlocks.)
+ */
+static void disable_bearer(struct tipc_bearer *tb_ptr)
+{
+	struct ib_bearer *ib_ptr = (struct ib_bearer *)tb_ptr->usr_handle;
+
+	ib_ptr->bearer = NULL;
+	INIT_WORK(&ib_ptr->cleanup, cleanup_bearer);
+	schedule_work(&ib_ptr->cleanup);
+}
+
+/**
+ * recv_notification - handle device updates from OS
+ *
+ * Change the state of the InfiniBand bearer (if any) associated with the
+ * specified device.
+ */
+static int recv_notification(struct notifier_block *nb, unsigned long evt,
+			     void *dv)
+{
+	struct net_device *dev = (struct net_device *)dv;
+	struct ib_bearer *ib_ptr = &ib_bearers[0];
+	struct ib_bearer *stop = &ib_bearers[MAX_IB_BEARERS];
+
+	if (!net_eq(dev_net(dev), &init_net))
+		return NOTIFY_DONE;
+
+	while ((ib_ptr->dev != dev)) {
+		if (++ib_ptr == stop)
+			return NOTIFY_DONE;	/* couldn't find device */
+	}
+	if (!ib_ptr->bearer)
+		return NOTIFY_DONE;		/* bearer had been disabled */
+
+	ib_ptr->bearer->mtu = dev->mtu;
+
+	switch (evt) {
+	case NETDEV_CHANGE:
+		if (netif_carrier_ok(dev))
+			tipc_continue(ib_ptr->bearer);
+		else
+			tipc_block_bearer(ib_ptr->bearer->name);
+		break;
+	case NETDEV_UP:
+		tipc_continue(ib_ptr->bearer);
+		break;
+	case NETDEV_DOWN:
+		tipc_block_bearer(ib_ptr->bearer->name);
+		break;
+	case NETDEV_CHANGEMTU:
+	case NETDEV_CHANGEADDR:
+		tipc_block_bearer(ib_ptr->bearer->name);
+		tipc_continue(ib_ptr->bearer);
+		break;
+	case NETDEV_UNREGISTER:
+	case NETDEV_CHANGENAME:
+		tipc_disable_bearer(ib_ptr->bearer->name);
+		break;
+	}
+	return NOTIFY_OK;
+}
+
+static struct notifier_block notifier = {
+	.notifier_call	= recv_notification,
+	.priority	= 0,
+};
+
+/**
+ * ib_addr2str - convert InfiniBand address to string
+ */
+static int ib_addr2str(struct tipc_media_addr *a, char *str_buf, int str_size)
+{
+	if (str_size < 60)	/* 60 = 19 * strlen("xx:") + strlen("xx\0") */
+		return 1;
+
+	sprintf(str_buf, "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:"
+			 "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
+		a->value[0], a->value[1], a->value[2], a->value[3],
+		a->value[4], a->value[5], a->value[6], a->value[7],
+		a->value[8], a->value[9], a->value[10], a->value[11],
+		a->value[12], a->value[13], a->value[14], a->value[15],
+		a->value[16], a->value[17], a->value[18], a->value[19]);
+
+	return 0;
+}
+
+/**
+ * ib_addr2msg - convert InfiniBand address format to message header format
+ */
+static int ib_addr2msg(struct tipc_media_addr *a, char *msg_area)
+{
+	memset(msg_area, 0, TIPC_MEDIA_ADDR_SIZE);
+	msg_area[TIPC_MEDIA_TYPE_OFFSET] = TIPC_MEDIA_TYPE_IB;
+	memcpy(msg_area, a->value, INFINIBAND_ALEN);
+	return 0;
+}
+
+/**
+ * ib_msg2addr - convert message header address format to InfiniBand format
+ */
+static int ib_msg2addr(const struct tipc_bearer *tb_ptr,
+		       struct tipc_media_addr *a, char *msg_area)
+{
+	ib_media_addr_set(tb_ptr, a, msg_area);
+	return 0;
+}
+
+/*
+ * InfiniBand media registration info
+ */
+static struct tipc_media ib_media_info = {
+	.send_msg	= send_msg,
+	.enable_bearer	= enable_bearer,
+	.disable_bearer	= disable_bearer,
+	.addr2str	= ib_addr2str,
+	.addr2msg	= ib_addr2msg,
+	.msg2addr	= ib_msg2addr,
+	.priority	= TIPC_DEF_LINK_PRI,
+	.tolerance	= TIPC_DEF_LINK_TOL,
+	.window		= TIPC_DEF_LINK_WIN,
+	.type_id	= TIPC_MEDIA_TYPE_IB,
+	.name		= "ib"
+};
+
+/**
+ * tipc_ib_media_start - activate InfiniBand bearer support
+ *
+ * Register InfiniBand media type with TIPC bearer code.  Also register
+ * with OS for notifications about device state changes.
+ */
+int tipc_ib_media_start(void)
+{
+	int res;
+
+	if (ib_started)
+		return -EINVAL;
+
+	res = tipc_register_media(&ib_media_info);
+	if (res)
+		return res;
+
+	res = register_netdevice_notifier(&notifier);
+	if (!res)
+		ib_started = 1;
+	return res;
+}
+
+/**
+ * tipc_ib_media_stop - deactivate InfiniBand bearer support
+ */
+void tipc_ib_media_stop(void)
+{
+	if (!ib_started)
+		return;
+
+	flush_scheduled_work();
+	unregister_netdevice_notifier(&notifier);
+	ib_started = 0;
+}