Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 4989 insertions, 0 deletions

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
new file mode 100644
index 000000000..2d70cdd26
--- /dev/null
+++ b/drivers/net/bonding/bond_main.c
@@ -0,0 +1,4989 @@
+/*
+ * originally based on the dummy device.
+ *
+ * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
+ * Licensed under the GPL. Based on dummy.c, and eql.c devices.
+ *
+ * bonding.c: an Ethernet Bonding driver
+ *
+ * This is useful to talk to a Cisco EtherChannel compatible equipment:
+ *	Cisco 5500
+ *	Sun Trunking (Solaris)
+ *	Alteon AceDirector Trunks
+ *	Linux Bonding
+ *	and probably many L2 switches ...
+ *
+ * How it works:
+ *    ifconfig bond0 ipaddress netmask up
+ *      will setup a network device, with an ip address.  No mac address
+ *	will be assigned at this time.  The hw mac address will come from
+ *	the first slave bonded to the channel.  All slaves will then use
+ *	this hw mac address.
+ *
+ *    ifconfig bond0 down
+ *         will release all slaves, marking them as down.
+ *
+ *    ifenslave bond0 eth0
+ *	will attach eth0 to bond0 as a slave.  eth0 hw mac address will either
+ *	a: be used as initial mac address
+ *	b: if a hw mac address already is there, eth0's hw mac address
+ *	   will then be set from bond0.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <net/ip.h>
+#include <linux/ip.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/socket.h>
+#include <linux/ctype.h>
+#include <linux/inet.h>
+#include <linux/bitops.h>
+#include <linux/io.h>
+#include <asm/dma.h>
+#include <linux/uaccess.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
+#include <linux/igmp.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <linux/rtnetlink.h>
+#include <linux/smp.h>
+#include <linux/if_ether.h>
+#include <net/arp.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/if_vlan.h>
+#include <linux/if_bonding.h>
+#include <linux/jiffies.h>
+#include <linux/preempt.h>
+#include <net/route.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+#include <net/pkt_sched.h>
+#include <linux/rculist.h>
+#include <net/flow_dissector.h>
+#include <net/switchdev.h>
+#include <net/bonding.h>
+#include <net/bond_3ad.h>
+#include <net/bond_alb.h>
+
+#include "bonding_priv.h"
+
+/*---------------------------- Module parameters ----------------------------*/
+
+/* monitor all links that often (in milliseconds). <=0 disables monitoring */
+
+static int max_bonds	= BOND_DEFAULT_MAX_BONDS;
+static int tx_queues	= BOND_DEFAULT_TX_QUEUES;
+static int num_peer_notif = 1;
+static int miimon;
+static int updelay;
+static int downdelay;
+static int use_carrier	= 1;
+static char *mode;
+static char *primary;
+static char *primary_reselect;
+static char *lacp_rate;
+static int min_links;
+static char *ad_select;
+static char *xmit_hash_policy;
+static int arp_interval;
+static char *arp_ip_target[BOND_MAX_ARP_TARGETS];
+static char *arp_validate;
+static char *arp_all_targets;
+static char *fail_over_mac;
+static int all_slaves_active;
+static struct bond_params bonding_defaults;
+static int resend_igmp = BOND_DEFAULT_RESEND_IGMP;
+static int packets_per_slave = 1;
+static int lp_interval = BOND_ALB_DEFAULT_LP_INTERVAL;
+
+module_param(max_bonds, int, 0);
+MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
+module_param(tx_queues, int, 0);
+MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)");
+module_param_named(num_grat_arp, num_peer_notif, int, 0644);
+MODULE_PARM_DESC(num_grat_arp, "Number of peer notifications to send on "
+			       "failover event (alias of num_unsol_na)");
+module_param_named(num_unsol_na, num_peer_notif, int, 0644);
+MODULE_PARM_DESC(num_unsol_na, "Number of peer notifications to send on "
+			       "failover event (alias of num_grat_arp)");
+module_param(miimon, int, 0);
+MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
+module_param(updelay, int, 0);
+MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
+module_param(downdelay, int, 0);
+MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
+			    "in milliseconds");
+module_param(use_carrier, int, 0);
+MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
+			      "0 for off, 1 for on (default)");
+module_param(mode, charp, 0);
+MODULE_PARM_DESC(mode, "Mode of operation; 0 for balance-rr, "
+		       "1 for active-backup, 2 for balance-xor, "
+		       "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
+		       "6 for balance-alb");
+module_param(primary, charp, 0);
+MODULE_PARM_DESC(primary, "Primary network device to use");
+module_param(primary_reselect, charp, 0);
+MODULE_PARM_DESC(primary_reselect, "Reselect primary slave "
+				   "once it comes up; "
+				   "0 for always (default), "
+				   "1 for only if speed of primary is "
+				   "better, "
+				   "2 for only on active slave "
+				   "failure");
+module_param(lacp_rate, charp, 0);
+MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner; "
+			    "0 for slow, 1 for fast");
+module_param(ad_select, charp, 0);
+MODULE_PARM_DESC(ad_select, "802.3ad aggregation selection logic; "
+			    "0 for stable (default), 1 for bandwidth, "
+			    "2 for count");
+module_param(min_links, int, 0);
+MODULE_PARM_DESC(min_links, "Minimum number of available links before turning on carrier");
+
+module_param(xmit_hash_policy, charp, 0);
+MODULE_PARM_DESC(xmit_hash_policy, "balance-alb, balance-tlb, balance-xor, 802.3ad hashing method; "
+				   "0 for layer 2 (default), 1 for layer 3+4, "
+				   "2 for layer 2+3, 3 for encap layer 2+3, "
+				   "4 for encap layer 3+4");
+module_param(arp_interval, int, 0);
+MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
+module_param_array(arp_ip_target, charp, NULL, 0);
+MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
+module_param(arp_validate, charp, 0);
+MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes; "
+			       "0 for none (default), 1 for active, "
+			       "2 for backup, 3 for all");
+module_param(arp_all_targets, charp, 0);
+MODULE_PARM_DESC(arp_all_targets, "fail on any/all arp targets timeout; 0 for any (default), 1 for all");
+module_param(fail_over_mac, charp, 0);
+MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to "
+				"the same MAC; 0 for none (default), "
+				"1 for active, 2 for follow");
+module_param(all_slaves_active, int, 0);
+MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface "
+				     "by setting active flag for all slaves; "
+				     "0 for never (default), 1 for always.");
+module_param(resend_igmp, int, 0);
+MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on "
+			      "link failure");
+module_param(packets_per_slave, int, 0);
+MODULE_PARM_DESC(packets_per_slave, "Packets to send per slave in balance-rr "
+				    "mode; 0 for a random slave, 1 packet per "
+				    "slave (default), >1 packets per slave.");
+module_param(lp_interval, uint, 0);
+MODULE_PARM_DESC(lp_interval, "The number of seconds between instances where "
+			      "the bonding driver sends learning packets to "
+			      "each slaves peer switch. The default is 1.");
+
+/*----------------------------- Global variables ----------------------------*/
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+atomic_t netpoll_block_tx = ATOMIC_INIT(0);
+#endif
+
+unsigned int bond_net_id __read_mostly;
+
+/*-------------------------- Forward declarations ---------------------------*/
+
+static int bond_init(struct net_device *bond_dev);
+static void bond_uninit(struct net_device *bond_dev);
+static void bond_get_stats(struct net_device *bond_dev,
+			   struct rtnl_link_stats64 *stats);
+static void bond_slave_arr_handler(struct work_struct *work);
+static bool bond_time_in_interval(struct bonding *bond, unsigned long last_act,
+				  int mod);
+static void bond_netdev_notify_work(struct work_struct *work);
+
+/*---------------------------- General routines -----------------------------*/
+
+const char *bond_mode_name(int mode)
+{
+	static const char *names[] = {
+		[BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)",
+		[BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)",
+		[BOND_MODE_XOR] = "load balancing (xor)",
+		[BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)",
+		[BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation",
+		[BOND_MODE_TLB] = "transmit load balancing",
+		[BOND_MODE_ALB] = "adaptive load balancing",
+	};
+
+	if (mode < BOND_MODE_ROUNDROBIN || mode > BOND_MODE_ALB)
+		return "unknown";
+
+	return names[mode];
+}
+
+/*---------------------------------- VLAN -----------------------------------*/
+
+/**
+ * bond_dev_queue_xmit - Prepare skb for xmit.
+ *
+ * @bond: bond device that got this skb for tx.
+ * @skb: hw accel VLAN tagged skb to transmit
+ * @slave_dev: slave that is supposed to xmit this skbuff
+ */
+void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
+			struct net_device *slave_dev)
+{
+	skb->dev = slave_dev;
+
+	BUILD_BUG_ON(sizeof(skb->queue_mapping) !=
+		     sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping));
+	skb_set_queue_mapping(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping);
+
+	if (unlikely(netpoll_tx_running(bond->dev)))
+		bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb);
+	else
+		dev_queue_xmit(skb);
+}
+
+/* In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid,
+ * We don't protect the slave list iteration with a lock because:
+ * a. This operation is performed in IOCTL context,
+ * b. The operation is protected by the RTNL semaphore in the 8021q code,
+ * c. Holding a lock with BH disabled while directly calling a base driver
+ *    entry point is generally a BAD idea.
+ *
+ * The design of synchronization/protection for this operation in the 8021q
+ * module is good for one or more VLAN devices over a single physical device
+ * and cannot be extended for a teaming solution like bonding, so there is a
+ * potential race condition here where a net device from the vlan group might
+ * be referenced (either by a base driver or the 8021q code) while it is being
+ * removed from the system. However, it turns out we're not making matters
+ * worse, and if it works for regular VLAN usage it will work here too.
+*/
+
+/**
+ * bond_vlan_rx_add_vid - Propagates adding an id to slaves
+ * @bond_dev: bonding net device that got called
+ * @vid: vlan id being added
+ */
+static int bond_vlan_rx_add_vid(struct net_device *bond_dev,
+				__be16 proto, u16 vid)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct slave *slave, *rollback_slave;
+	struct list_head *iter;
+	int res;
+
+	bond_for_each_slave(bond, slave, iter) {
+		res = vlan_vid_add(slave->dev, proto, vid);
+		if (res)
+			goto unwind;
+	}
+
+	return 0;
+
+unwind:
+	/* unwind to the slave that failed */
+	bond_for_each_slave(bond, rollback_slave, iter) {
+		if (rollback_slave == slave)
+			break;
+
+		vlan_vid_del(rollback_slave->dev, proto, vid);
+	}
+
+	return res;
+}
+
+/**
+ * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
+ * @bond_dev: bonding net device that got called
+ * @vid: vlan id being removed
+ */
+static int bond_vlan_rx_kill_vid(struct net_device *bond_dev,
+				 __be16 proto, u16 vid)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct list_head *iter;
+	struct slave *slave;
+
+	bond_for_each_slave(bond, slave, iter)
+		vlan_vid_del(slave->dev, proto, vid);
+
+	if (bond_is_lb(bond))
+		bond_alb_clear_vlan(bond, vid);
+
+	return 0;
+}
+
+/*------------------------------- Link status -------------------------------*/
+
+/* Set the carrier state for the master according to the state of its
+ * slaves.  If any slaves are up, the master is up.  In 802.3ad mode,
+ * do special 802.3ad magic.
+ *
+ * Returns zero if carrier state does not change, nonzero if it does.
+ */
+int bond_set_carrier(struct bonding *bond)
+{
+	struct list_head *iter;
+	struct slave *slave;
+
+	if (!bond_has_slaves(bond))
+		goto down;
+
+	if (BOND_MODE(bond) == BOND_MODE_8023AD)
+		return bond_3ad_set_carrier(bond);
+
+	bond_for_each_slave(bond, slave, iter) {
+		if (slave->link == BOND_LINK_UP) {
+			if (!netif_carrier_ok(bond->dev)) {
+				netif_carrier_on(bond->dev);
+				return 1;
+			}
+			return 0;
+		}
+	}
+
+down:
+	if (netif_carrier_ok(bond->dev)) {
+		netif_carrier_off(bond->dev);
+		return 1;
+	}
+	return 0;
+}
+
+/* Get link speed and duplex from the slave's base driver
+ * using ethtool. If for some reason the call fails or the
+ * values are invalid, set speed and duplex to -1,
+ * and return. Return 1 if speed or duplex settings are
+ * UNKNOWN; 0 otherwise.
+ */
+static int bond_update_speed_duplex(struct slave *slave)
+{
+	struct net_device *slave_dev = slave->dev;
+	struct ethtool_link_ksettings ecmd;
+	int res;
+
+	slave->speed = SPEED_UNKNOWN;
+	slave->duplex = DUPLEX_UNKNOWN;
+
+	res = __ethtool_get_link_ksettings(slave_dev, &ecmd);
+	if (res < 0)
+		return 1;
+	if (ecmd.base.speed == 0 || ecmd.base.speed == ((__u32)-1))
+		return 1;
+	switch (ecmd.base.duplex) {
+	case DUPLEX_FULL:
+	case DUPLEX_HALF:
+		break;
+	default:
+		return 1;
+	}
+
+	slave->speed = ecmd.base.speed;
+	slave->duplex = ecmd.base.duplex;
+
+	return 0;
+}
+
+const char *bond_slave_link_status(s8 link)
+{
+	switch (link) {
+	case BOND_LINK_UP:
+		return "up";
+	case BOND_LINK_FAIL:
+		return "going down";
+	case BOND_LINK_DOWN:
+		return "down";
+	case BOND_LINK_BACK:
+		return "going back";
+	default:
+		return "unknown";
+	}
+}
+
+/* if <dev> supports MII link status reporting, check its link status.
+ *
+ * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
+ * depending upon the setting of the use_carrier parameter.
+ *
+ * Return either BMSR_LSTATUS, meaning that the link is up (or we
+ * can't tell and just pretend it is), or 0, meaning that the link is
+ * down.
+ *
+ * If reporting is non-zero, instead of faking link up, return -1 if
+ * both ETHTOOL and MII ioctls fail (meaning the device does not
+ * support them).  If use_carrier is set, return whatever it says.
+ * It'd be nice if there was a good way to tell if a driver supports
+ * netif_carrier, but there really isn't.
+ */
+static int bond_check_dev_link(struct bonding *bond,
+			       struct net_device *slave_dev, int reporting)
+{
+	const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
+	int (*ioctl)(struct net_device *, struct ifreq *, int);
+	struct ifreq ifr;
+	struct mii_ioctl_data *mii;
+
+	if (!reporting && !netif_running(slave_dev))
+		return 0;
+
+	if (bond->params.use_carrier)
+		return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
+
+	/* Try to get link status using Ethtool first. */
+	if (slave_dev->ethtool_ops->get_link)
+		return slave_dev->ethtool_ops->get_link(slave_dev) ?
+			BMSR_LSTATUS : 0;
+
+	/* Ethtool can't be used, fallback to MII ioctls. */
+	ioctl = slave_ops->ndo_do_ioctl;
+	if (ioctl) {
+		/* TODO: set pointer to correct ioctl on a per team member
+		 *       bases to make this more efficient. that is, once
+		 *       we determine the correct ioctl, we will always
+		 *       call it and not the others for that team
+		 *       member.
+		 */
+
+		/* We cannot assume that SIOCGMIIPHY will also read a
+		 * register; not all network drivers (e.g., e100)
+		 * support that.
+		 */
+
+		/* Yes, the mii is overlaid on the ifreq.ifr_ifru */
+		strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
+		mii = if_mii(&ifr);
+		if (ioctl(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
+			mii->reg_num = MII_BMSR;
+			if (ioctl(slave_dev, &ifr, SIOCGMIIREG) == 0)
+				return mii->val_out & BMSR_LSTATUS;
+		}
+	}
+
+	/* If reporting, report that either there's no dev->do_ioctl,
+	 * or both SIOCGMIIREG and get_link failed (meaning that we
+	 * cannot report link status).  If not reporting, pretend
+	 * we're ok.
+	 */
+	return reporting ? -1 : BMSR_LSTATUS;
+}
+
+/*----------------------------- Multicast list ------------------------------*/
+
+/* Push the promiscuity flag down to appropriate slaves */
+static int bond_set_promiscuity(struct bonding *bond, int inc)
+{
+	struct list_head *iter;
+	int err = 0;
+
+	if (bond_uses_primary(bond)) {
+		struct slave *curr_active = rtnl_dereference(bond->curr_active_slave);
+
+		if (curr_active)
+			err = dev_set_promiscuity(curr_active->dev, inc);
+	} else {
+		struct slave *slave;
+
+		bond_for_each_slave(bond, slave, iter) {
+			err = dev_set_promiscuity(slave->dev, inc);
+			if (err)
+				return err;
+		}
+	}
+	return err;
+}
+
+/* Push the allmulti flag down to all slaves */
+static int bond_set_allmulti(struct bonding *bond, int inc)
+{
+	struct list_head *iter;
+	int err = 0;
+
+	if (bond_uses_primary(bond)) {
+		struct slave *curr_active = rtnl_dereference(bond->curr_active_slave);
+
+		if (curr_active)
+			err = dev_set_allmulti(curr_active->dev, inc);
+	} else {
+		struct slave *slave;
+
+		bond_for_each_slave(bond, slave, iter) {
+			err = dev_set_allmulti(slave->dev, inc);
+			if (err)
+				return err;
+		}
+	}
+	return err;
+}
+
+/* Retrieve the list of registered multicast addresses for the bonding
+ * device and retransmit an IGMP JOIN request to the current active
+ * slave.
+ */
+static void bond_resend_igmp_join_requests_delayed(struct work_struct *work)
+{
+	struct bonding *bond = container_of(work, struct bonding,
+					    mcast_work.work);
+
+	if (!rtnl_trylock()) {
+		queue_delayed_work(bond->wq, &bond->mcast_work, 1);
+		return;
+	}
+	call_netdevice_notifiers(NETDEV_RESEND_IGMP, bond->dev);
+
+	if (bond->igmp_retrans > 1) {
+		bond->igmp_retrans--;
+		queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5);
+	}
+	rtnl_unlock();
+}
+
+/* Flush bond's hardware addresses from slave */
+static void bond_hw_addr_flush(struct net_device *bond_dev,
+			       struct net_device *slave_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+
+	dev_uc_unsync(slave_dev, bond_dev);
+	dev_mc_unsync(slave_dev, bond_dev);
+
+	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+		/* del lacpdu mc addr from mc list */
+		u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
+
+		dev_mc_del(slave_dev, lacpdu_multicast);
+	}
+}
+
+/*--------------------------- Active slave change ---------------------------*/
+
+/* Update the hardware address list and promisc/allmulti for the new and
+ * old active slaves (if any).  Modes that are not using primary keep all
+ * slaves up date at all times; only the modes that use primary need to call
+ * this function to swap these settings during a failover.
+ */
+static void bond_hw_addr_swap(struct bonding *bond, struct slave *new_active,
+			      struct slave *old_active)
+{
+	if (old_active) {
+		if (bond->dev->flags & IFF_PROMISC)
+			dev_set_promiscuity(old_active->dev, -1);
+
+		if (bond->dev->flags & IFF_ALLMULTI)
+			dev_set_allmulti(old_active->dev, -1);
+
+		bond_hw_addr_flush(bond->dev, old_active->dev);
+	}
+
+	if (new_active) {
+		/* FIXME: Signal errors upstream. */
+		if (bond->dev->flags & IFF_PROMISC)
+			dev_set_promiscuity(new_active->dev, 1);
+
+		if (bond->dev->flags & IFF_ALLMULTI)
+			dev_set_allmulti(new_active->dev, 1);
+
+		netif_addr_lock_bh(bond->dev);
+		dev_uc_sync(new_active->dev, bond->dev);
+		dev_mc_sync(new_active->dev, bond->dev);
+		netif_addr_unlock_bh(bond->dev);
+	}
+}
+
+/**
+ * bond_set_dev_addr - clone slave's address to bond
+ * @bond_dev: bond net device
+ * @slave_dev: slave net device
+ *
+ * Should be called with RTNL held.
+ */
+static void bond_set_dev_addr(struct net_device *bond_dev,
+			      struct net_device *slave_dev)
+{
+	netdev_dbg(bond_dev, "bond_dev=%p slave_dev=%p slave_dev->name=%s slave_dev->addr_len=%d\n",
+		   bond_dev, slave_dev, slave_dev->name, slave_dev->addr_len);
+	memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
+	bond_dev->addr_assign_type = NET_ADDR_STOLEN;
+	call_netdevice_notifiers(NETDEV_CHANGEADDR, bond_dev);
+}
+
+static struct slave *bond_get_old_active(struct bonding *bond,
+					 struct slave *new_active)
+{
+	struct slave *slave;
+	struct list_head *iter;
+
+	bond_for_each_slave(bond, slave, iter) {
+		if (slave == new_active)
+			continue;
+
+		if (ether_addr_equal(bond->dev->dev_addr, slave->dev->dev_addr))
+			return slave;
+	}
+
+	return NULL;
+}
+
+/* bond_do_fail_over_mac
+ *
+ * Perform special MAC address swapping for fail_over_mac settings
+ *
+ * Called with RTNL
+ */
+static void bond_do_fail_over_mac(struct bonding *bond,
+				  struct slave *new_active,
+				  struct slave *old_active)
+{
+	u8 tmp_mac[MAX_ADDR_LEN];
+	struct sockaddr_storage ss;
+	int rv;
+
+	switch (bond->params.fail_over_mac) {
+	case BOND_FOM_ACTIVE:
+		if (new_active)
+			bond_set_dev_addr(bond->dev, new_active->dev);
+		break;
+	case BOND_FOM_FOLLOW:
+		/* if new_active && old_active, swap them
+		 * if just old_active, do nothing (going to no active slave)
+		 * if just new_active, set new_active to bond's MAC
+		 */
+		if (!new_active)
+			return;
+
+		if (!old_active)
+			old_active = bond_get_old_active(bond, new_active);
+
+		if (old_active) {
+			bond_hw_addr_copy(tmp_mac, new_active->dev->dev_addr,
+					  new_active->dev->addr_len);
+			bond_hw_addr_copy(ss.__data,
+					  old_active->dev->dev_addr,
+					  old_active->dev->addr_len);
+			ss.ss_family = new_active->dev->type;
+		} else {
+			bond_hw_addr_copy(ss.__data, bond->dev->dev_addr,
+					  bond->dev->addr_len);
+			ss.ss_family = bond->dev->type;
+		}
+
+		rv = dev_set_mac_address(new_active->dev,
+					 (struct sockaddr *)&ss);
+		if (rv) {
+			netdev_err(bond->dev, "Error %d setting MAC of slave %s\n",
+				   -rv, new_active->dev->name);
+			goto out;
+		}
+
+		if (!old_active)
+			goto out;
+
+		bond_hw_addr_copy(ss.__data, tmp_mac,
+				  new_active->dev->addr_len);
+		ss.ss_family = old_active->dev->type;
+
+		rv = dev_set_mac_address(old_active->dev,
+					 (struct sockaddr *)&ss);
+		if (rv)
+			netdev_err(bond->dev, "Error %d setting MAC of slave %s\n",
+				   -rv, new_active->dev->name);
+out:
+		break;
+	default:
+		netdev_err(bond->dev, "bond_do_fail_over_mac impossible: bad policy %d\n",
+			   bond->params.fail_over_mac);
+		break;
+	}
+
+}
+
+static struct slave *bond_choose_primary_or_current(struct bonding *bond)
+{
+	struct slave *prim = rtnl_dereference(bond->primary_slave);
+	struct slave *curr = rtnl_dereference(bond->curr_active_slave);
+
+	if (!prim || prim->link != BOND_LINK_UP) {
+		if (!curr || curr->link != BOND_LINK_UP)
+			return NULL;
+		return curr;
+	}
+
+	if (bond->force_primary) {
+		bond->force_primary = false;
+		return prim;
+	}
+
+	if (!curr || curr->link != BOND_LINK_UP)
+		return prim;
+
+	/* At this point, prim and curr are both up */
+	switch (bond->params.primary_reselect) {
+	case BOND_PRI_RESELECT_ALWAYS:
+		return prim;
+	case BOND_PRI_RESELECT_BETTER:
+		if (prim->speed < curr->speed)
+			return curr;
+		if (prim->speed == curr->speed && prim->duplex <= curr->duplex)
+			return curr;
+		return prim;
+	case BOND_PRI_RESELECT_FAILURE:
+		return curr;
+	default:
+		netdev_err(bond->dev, "impossible primary_reselect %d\n",
+			   bond->params.primary_reselect);
+		return curr;
+	}
+}
+
+/**
+ * bond_find_best_slave - select the best available slave to be the active one
+ * @bond: our bonding struct
+ */
+static struct slave *bond_find_best_slave(struct bonding *bond)
+{
+	struct slave *slave, *bestslave = NULL;
+	struct list_head *iter;
+	int mintime = bond->params.updelay;
+
+	slave = bond_choose_primary_or_current(bond);
+	if (slave)
+		return slave;
+
+	bond_for_each_slave(bond, slave, iter) {
+		if (slave->link == BOND_LINK_UP)
+			return slave;
+		if (slave->link == BOND_LINK_BACK && bond_slave_is_up(slave) &&
+		    slave->delay < mintime) {
+			mintime = slave->delay;
+			bestslave = slave;
+		}
+	}
+
+	return bestslave;
+}
+
+static bool bond_should_notify_peers(struct bonding *bond)
+{
+	struct slave *slave;
+
+	rcu_read_lock();
+	slave = rcu_dereference(bond->curr_active_slave);
+	rcu_read_unlock();
+
+	if (!slave || !bond->send_peer_notif ||
+	    !netif_carrier_ok(bond->dev) ||
+	    test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
+		return false;
+
+	netdev_dbg(bond->dev, "bond_should_notify_peers: slave %s\n",
+		   slave ? slave->dev->name : "NULL");
+
+	return true;
+}
+
+/**
+ * change_active_interface - change the active slave into the specified one
+ * @bond: our bonding struct
+ * @new: the new slave to make the active one
+ *
+ * Set the new slave to the bond's settings and unset them on the old
+ * curr_active_slave.
+ * Setting include flags, mc-list, promiscuity, allmulti, etc.
+ *
+ * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
+ * because it is apparently the best available slave we have, even though its
+ * updelay hasn't timed out yet.
+ *
+ * Caller must hold RTNL.
+ */
+void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
+{
+	struct slave *old_active;
+
+	ASSERT_RTNL();
+
+	old_active = rtnl_dereference(bond->curr_active_slave);
+
+	if (old_active == new_active)
+		return;
+
+	if (new_active) {
+		new_active->last_link_up = jiffies;
+
+		if (new_active->link == BOND_LINK_BACK) {
+			if (bond_uses_primary(bond)) {
+				netdev_info(bond->dev, "making interface %s the new active one %d ms earlier\n",
+					    new_active->dev->name,
+					    (bond->params.updelay - new_active->delay) * bond->params.miimon);
+			}
+
+			new_active->delay = 0;
+			bond_set_slave_link_state(new_active, BOND_LINK_UP,
+						  BOND_SLAVE_NOTIFY_NOW);
+
+			if (BOND_MODE(bond) == BOND_MODE_8023AD)
+				bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
+
+			if (bond_is_lb(bond))
+				bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
+		} else {
+			if (bond_uses_primary(bond)) {
+				netdev_info(bond->dev, "making interface %s the new active one\n",
+					    new_active->dev->name);
+			}
+		}
+	}
+
+	if (bond_uses_primary(bond))
+		bond_hw_addr_swap(bond, new_active, old_active);
+
+	if (bond_is_lb(bond)) {
+		bond_alb_handle_active_change(bond, new_active);
+		if (old_active)
+			bond_set_slave_inactive_flags(old_active,
+						      BOND_SLAVE_NOTIFY_NOW);
+		if (new_active)
+			bond_set_slave_active_flags(new_active,
+						    BOND_SLAVE_NOTIFY_NOW);
+	} else {
+		rcu_assign_pointer(bond->curr_active_slave, new_active);
+	}
+
+	if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) {
+		if (old_active)
+			bond_set_slave_inactive_flags(old_active,
+						      BOND_SLAVE_NOTIFY_NOW);
+
+		if (new_active) {
+			bool should_notify_peers = false;
+
+			bond_set_slave_active_flags(new_active,
+						    BOND_SLAVE_NOTIFY_NOW);
+
+			if (bond->params.fail_over_mac)
+				bond_do_fail_over_mac(bond, new_active,
+						      old_active);
+
+			if (netif_running(bond->dev)) {
+				bond->send_peer_notif =
+					bond->params.num_peer_notif;
+				should_notify_peers =
+					bond_should_notify_peers(bond);
+			}
+
+			call_netdevice_notifiers(NETDEV_BONDING_FAILOVER, bond->dev);
+			if (should_notify_peers)
+				call_netdevice_notifiers(NETDEV_NOTIFY_PEERS,
+							 bond->dev);
+		}
+	}
+
+	/* resend IGMP joins since active slave has changed or
+	 * all were sent on curr_active_slave.
+	 * resend only if bond is brought up with the affected
+	 * bonding modes and the retransmission is enabled
+	 */
+	if (netif_running(bond->dev) && (bond->params.resend_igmp > 0) &&
+	    ((bond_uses_primary(bond) && new_active) ||
+	     BOND_MODE(bond) == BOND_MODE_ROUNDROBIN)) {
+		bond->igmp_retrans = bond->params.resend_igmp;
+		queue_delayed_work(bond->wq, &bond->mcast_work, 1);
+	}
+}
+
+/**
+ * bond_select_active_slave - select a new active slave, if needed
+ * @bond: our bonding struct
+ *
+ * This functions should be called when one of the following occurs:
+ * - The old curr_active_slave has been released or lost its link.
+ * - The primary_slave has got its link back.
+ * - A slave has got its link back and there's no old curr_active_slave.
+ *
+ * Caller must hold RTNL.
+ */
+void bond_select_active_slave(struct bonding *bond)
+{
+	struct slave *best_slave;
+	int rv;
+
+	ASSERT_RTNL();
+
+	best_slave = bond_find_best_slave(bond);
+	if (best_slave != rtnl_dereference(bond->curr_active_slave)) {
+		bond_change_active_slave(bond, best_slave);
+		rv = bond_set_carrier(bond);
+		if (!rv)
+			return;
+
+		if (netif_carrier_ok(bond->dev))
+			netdev_info(bond->dev, "first active interface up!\n");
+		else
+			netdev_info(bond->dev, "now running without any active interface!\n");
+	}
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static inline int slave_enable_netpoll(struct slave *slave)
+{
+	struct netpoll *np;
+	int err = 0;
+
+	np = kzalloc(sizeof(*np), GFP_KERNEL);
+	err = -ENOMEM;
+	if (!np)
+		goto out;
+
+	err = __netpoll_setup(np, slave->dev);
+	if (err) {
+		kfree(np);
+		goto out;
+	}
+	slave->np = np;
+out:
+	return err;
+}
+static inline void slave_disable_netpoll(struct slave *slave)
+{
+	struct netpoll *np = slave->np;
+
+	if (!np)
+		return;
+
+	slave->np = NULL;
+	__netpoll_free_async(np);
+}
+
+static void bond_poll_controller(struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct slave *slave = NULL;
+	struct list_head *iter;
+	struct ad_info ad_info;
+
+	if (BOND_MODE(bond) == BOND_MODE_8023AD)
+		if (bond_3ad_get_active_agg_info(bond, &ad_info))
+			return;
+
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		if (!bond_slave_is_up(slave))
+			continue;
+
+		if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+			struct aggregator *agg =
+			    SLAVE_AD_INFO(slave)->port.aggregator;
+
+			if (agg &&
+			    agg->aggregator_identifier != ad_info.aggregator_id)
+				continue;
+		}
+
+		netpoll_poll_dev(slave->dev);
+	}
+}
+
+static void bond_netpoll_cleanup(struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct list_head *iter;
+	struct slave *slave;
+
+	bond_for_each_slave(bond, slave, iter)
+		if (bond_slave_is_up(slave))
+			slave_disable_netpoll(slave);
+}
+
+static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni)
+{
+	struct bonding *bond = netdev_priv(dev);
+	struct list_head *iter;
+	struct slave *slave;
+	int err = 0;
+
+	bond_for_each_slave(bond, slave, iter) {
+		err = slave_enable_netpoll(slave);
+		if (err) {
+			bond_netpoll_cleanup(dev);
+			break;
+		}
+	}
+	return err;
+}
+#else
+static inline int slave_enable_netpoll(struct slave *slave)
+{
+	return 0;
+}
+static inline void slave_disable_netpoll(struct slave *slave)
+{
+}
+static void bond_netpoll_cleanup(struct net_device *bond_dev)
+{
+}
+#endif
+
+/*---------------------------------- IOCTL ----------------------------------*/
+
+static netdev_features_t bond_fix_features(struct net_device *dev,
+					   netdev_features_t features)
+{
+	struct bonding *bond = netdev_priv(dev);
+	struct list_head *iter;
+	netdev_features_t mask;
+	struct slave *slave;
+
+	mask = features;
+
+	features &= ~NETIF_F_ONE_FOR_ALL;
+	features |= NETIF_F_ALL_FOR_ALL;
+
+	bond_for_each_slave(bond, slave, iter) {
+		features = netdev_increment_features(features,
+						     slave->dev->features,
+						     mask);
+	}
+	features = netdev_add_tso_features(features, mask);
+
+	return features;
+}
+
+#define BOND_VLAN_FEATURES	(NETIF_F_HW_CSUM | NETIF_F_SG | \
+				 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
+				 NETIF_F_HIGHDMA | NETIF_F_LRO)
+
+#define BOND_ENC_FEATURES	(NETIF_F_HW_CSUM | NETIF_F_SG | \
+				 NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
+
+static void bond_compute_features(struct bonding *bond)
+{
+	unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
+					IFF_XMIT_DST_RELEASE_PERM;
+	netdev_features_t vlan_features = BOND_VLAN_FEATURES;
+	netdev_features_t enc_features  = BOND_ENC_FEATURES;
+	struct net_device *bond_dev = bond->dev;
+	struct list_head *iter;
+	struct slave *slave;
+	unsigned short max_hard_header_len = ETH_HLEN;
+	unsigned int gso_max_size = GSO_MAX_SIZE;
+	u16 gso_max_segs = GSO_MAX_SEGS;
+
+	if (!bond_has_slaves(bond))
+		goto done;
+	vlan_features &= NETIF_F_ALL_FOR_ALL;
+
+	bond_for_each_slave(bond, slave, iter) {
+		vlan_features = netdev_increment_features(vlan_features,
+			slave->dev->vlan_features, BOND_VLAN_FEATURES);
+
+		enc_features = netdev_increment_features(enc_features,
+							 slave->dev->hw_enc_features,
+							 BOND_ENC_FEATURES);
+		dst_release_flag &= slave->dev->priv_flags;
+		if (slave->dev->hard_header_len > max_hard_header_len)
+			max_hard_header_len = slave->dev->hard_header_len;
+
+		gso_max_size = min(gso_max_size, slave->dev->gso_max_size);
+		gso_max_segs = min(gso_max_segs, slave->dev->gso_max_segs);
+	}
+	bond_dev->hard_header_len = max_hard_header_len;
+
+done:
+	bond_dev->vlan_features = vlan_features;
+	bond_dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
+				    NETIF_F_HW_VLAN_CTAG_TX |
+				    NETIF_F_HW_VLAN_STAG_TX |
+				    NETIF_F_GSO_UDP_L4;
+	bond_dev->gso_max_segs = gso_max_segs;
+	netif_set_gso_max_size(bond_dev, gso_max_size);
+
+	bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
+	if ((bond_dev->priv_flags & IFF_XMIT_DST_RELEASE_PERM) &&
+	    dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
+		bond_dev->priv_flags |= IFF_XMIT_DST_RELEASE;
+
+	netdev_change_features(bond_dev);
+}
+
+static void bond_setup_by_slave(struct net_device *bond_dev,
+				struct net_device *slave_dev)
+{
+	bond_dev->header_ops	    = slave_dev->header_ops;
+
+	bond_dev->type		    = slave_dev->type;
+	bond_dev->hard_header_len   = slave_dev->hard_header_len;
+	bond_dev->needed_headroom   = slave_dev->needed_headroom;
+	bond_dev->addr_len	    = slave_dev->addr_len;
+
+	memcpy(bond_dev->broadcast, slave_dev->broadcast,
+		slave_dev->addr_len);
+}
+
+/* On bonding slaves other than the currently active slave, suppress
+ * duplicates except for alb non-mcast/bcast.
+ */
+static bool bond_should_deliver_exact_match(struct sk_buff *skb,
+					    struct slave *slave,
+					    struct bonding *bond)
+{
+	if (bond_is_slave_inactive(slave)) {
+		if (BOND_MODE(bond) == BOND_MODE_ALB &&
+		    skb->pkt_type != PACKET_BROADCAST &&
+		    skb->pkt_type != PACKET_MULTICAST)
+			return false;
+		return true;
+	}
+	return false;
+}
+
+static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb)
+{
+	struct sk_buff *skb = *pskb;
+	struct slave *slave;
+	struct bonding *bond;
+	int (*recv_probe)(const struct sk_buff *, struct bonding *,
+			  struct slave *);
+	int ret = RX_HANDLER_ANOTHER;
+
+	skb = skb_share_check(skb, GFP_ATOMIC);
+	if (unlikely(!skb))
+		return RX_HANDLER_CONSUMED;
+
+	*pskb = skb;
+
+	slave = bond_slave_get_rcu(skb->dev);
+	bond = slave->bond;
+
+	recv_probe = READ_ONCE(bond->recv_probe);
+	if (recv_probe) {
+		ret = recv_probe(skb, bond, slave);
+		if (ret == RX_HANDLER_CONSUMED) {
+			consume_skb(skb);
+			return ret;
+		}
+	}
+
+	/*
+	 * For packets determined by bond_should_deliver_exact_match() call to
+	 * be suppressed we want to make an exception for link-local packets.
+	 * This is necessary for e.g. LLDP daemons to be able to monitor
+	 * inactive slave links without being forced to bind to them
+	 * explicitly.
+	 *
+	 * At the same time, packets that are passed to the bonding master
+	 * (including link-local ones) can have their originating interface
+	 * determined via PACKET_ORIGDEV socket option.
+	 */
+	if (bond_should_deliver_exact_match(skb, slave, bond)) {
+		if (is_link_local_ether_addr(eth_hdr(skb)->h_dest))
+			return RX_HANDLER_PASS;
+		return RX_HANDLER_EXACT;
+	}
+
+	skb->dev = bond->dev;
+
+	if (BOND_MODE(bond) == BOND_MODE_ALB &&
+	    bond->dev->priv_flags & IFF_BRIDGE_PORT &&
+	    skb->pkt_type == PACKET_HOST) {
+
+		if (unlikely(skb_cow_head(skb,
+					  skb->data - skb_mac_header(skb)))) {
+			kfree_skb(skb);
+			return RX_HANDLER_CONSUMED;
+		}
+		bond_hw_addr_copy(eth_hdr(skb)->h_dest, bond->dev->dev_addr,
+				  bond->dev->addr_len);
+	}
+
+	return ret;
+}
+
+static enum netdev_lag_tx_type bond_lag_tx_type(struct bonding *bond)
+{
+	switch (BOND_MODE(bond)) {
+	case BOND_MODE_ROUNDROBIN:
+		return NETDEV_LAG_TX_TYPE_ROUNDROBIN;
+	case BOND_MODE_ACTIVEBACKUP:
+		return NETDEV_LAG_TX_TYPE_ACTIVEBACKUP;
+	case BOND_MODE_BROADCAST:
+		return NETDEV_LAG_TX_TYPE_BROADCAST;
+	case BOND_MODE_XOR:
+	case BOND_MODE_8023AD:
+		return NETDEV_LAG_TX_TYPE_HASH;
+	default:
+		return NETDEV_LAG_TX_TYPE_UNKNOWN;
+	}
+}
+
+static enum netdev_lag_hash bond_lag_hash_type(struct bonding *bond,
+					       enum netdev_lag_tx_type type)
+{
+	if (type != NETDEV_LAG_TX_TYPE_HASH)
+		return NETDEV_LAG_HASH_NONE;
+
+	switch (bond->params.xmit_policy) {
+	case BOND_XMIT_POLICY_LAYER2:
+		return NETDEV_LAG_HASH_L2;
+	case BOND_XMIT_POLICY_LAYER34:
+		return NETDEV_LAG_HASH_L34;
+	case BOND_XMIT_POLICY_LAYER23:
+		return NETDEV_LAG_HASH_L23;
+	case BOND_XMIT_POLICY_ENCAP23:
+		return NETDEV_LAG_HASH_E23;
+	case BOND_XMIT_POLICY_ENCAP34:
+		return NETDEV_LAG_HASH_E34;
+	default:
+		return NETDEV_LAG_HASH_UNKNOWN;
+	}
+}
+
+static int bond_master_upper_dev_link(struct bonding *bond, struct slave *slave,
+				      struct netlink_ext_ack *extack)
+{
+	struct netdev_lag_upper_info lag_upper_info;
+	enum netdev_lag_tx_type type;
+
+	type = bond_lag_tx_type(bond);
+	lag_upper_info.tx_type = type;
+	lag_upper_info.hash_type = bond_lag_hash_type(bond, type);
+
+	return netdev_master_upper_dev_link(slave->dev, bond->dev, slave,
+					    &lag_upper_info, extack);
+}
+
+static void bond_upper_dev_unlink(struct bonding *bond, struct slave *slave)
+{
+	netdev_upper_dev_unlink(slave->dev, bond->dev);
+	slave->dev->flags &= ~IFF_SLAVE;
+}
+
+static void slave_kobj_release(struct kobject *kobj)
+{
+	struct slave *slave = to_slave(kobj);
+	struct bonding *bond = bond_get_bond_by_slave(slave);
+
+	cancel_delayed_work_sync(&slave->notify_work);
+	if (BOND_MODE(bond) == BOND_MODE_8023AD)
+		kfree(SLAVE_AD_INFO(slave));
+
+	kfree(slave);
+}
+
+static struct kobj_type slave_ktype = {
+	.release = slave_kobj_release,
+#ifdef CONFIG_SYSFS
+	.sysfs_ops = &slave_sysfs_ops,
+#endif
+};
+
+static int bond_kobj_init(struct slave *slave)
+{
+	int err;
+
+	err = kobject_init_and_add(&slave->kobj, &slave_ktype,
+				   &(slave->dev->dev.kobj), "bonding_slave");
+	if (err)
+		kobject_put(&slave->kobj);
+
+	return err;
+}
+
+static struct slave *bond_alloc_slave(struct bonding *bond,
+				      struct net_device *slave_dev)
+{
+	struct slave *slave = NULL;
+
+	slave = kzalloc(sizeof(*slave), GFP_KERNEL);
+	if (!slave)
+		return NULL;
+
+	slave->bond = bond;
+	slave->dev = slave_dev;
+	INIT_DELAYED_WORK(&slave->notify_work, bond_netdev_notify_work);
+
+	if (bond_kobj_init(slave))
+		return NULL;
+
+	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+		SLAVE_AD_INFO(slave) = kzalloc(sizeof(struct ad_slave_info),
+					       GFP_KERNEL);
+		if (!SLAVE_AD_INFO(slave)) {
+			kobject_put(&slave->kobj);
+			return NULL;
+		}
+	}
+
+	return slave;
+}
+
+static void bond_fill_ifbond(struct bonding *bond, struct ifbond *info)
+{
+	info->bond_mode = BOND_MODE(bond);
+	info->miimon = bond->params.miimon;
+	info->num_slaves = bond->slave_cnt;
+}
+
+static void bond_fill_ifslave(struct slave *slave, struct ifslave *info)
+{
+	strcpy(info->slave_name, slave->dev->name);
+	info->link = slave->link;
+	info->state = bond_slave_state(slave);
+	info->link_failure_count = slave->link_failure_count;
+}
+
+static void bond_netdev_notify_work(struct work_struct *_work)
+{
+	struct slave *slave = container_of(_work, struct slave,
+					   notify_work.work);
+
+	if (rtnl_trylock()) {
+		struct netdev_bonding_info binfo;
+
+		bond_fill_ifslave(slave, &binfo.slave);
+		bond_fill_ifbond(slave->bond, &binfo.master);
+		netdev_bonding_info_change(slave->dev, &binfo);
+		rtnl_unlock();
+	} else {
+		queue_delayed_work(slave->bond->wq, &slave->notify_work, 1);
+	}
+}
+
+void bond_queue_slave_event(struct slave *slave)
+{
+	queue_delayed_work(slave->bond->wq, &slave->notify_work, 0);
+}
+
+void bond_lower_state_changed(struct slave *slave)
+{
+	struct netdev_lag_lower_state_info info;
+
+	info.link_up = slave->link == BOND_LINK_UP ||
+		       slave->link == BOND_LINK_FAIL;
+	info.tx_enabled = bond_is_active_slave(slave);
+	netdev_lower_state_changed(slave->dev, &info);
+}
+
+/* enslave device <slave> to bond device <master> */
+int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
+		 struct netlink_ext_ack *extack)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
+	struct slave *new_slave = NULL, *prev_slave;
+	struct sockaddr_storage ss;
+	int link_reporting;
+	int res = 0, i;
+
+	if (!bond->params.use_carrier &&
+	    slave_dev->ethtool_ops->get_link == NULL &&
+	    slave_ops->ndo_do_ioctl == NULL) {
+		netdev_warn(bond_dev, "no link monitoring support for %s\n",
+			    slave_dev->name);
+	}
+
+	/* already in-use? */
+	if (netdev_is_rx_handler_busy(slave_dev)) {
+		NL_SET_ERR_MSG(extack, "Device is in use and cannot be enslaved");
+		netdev_err(bond_dev,
+			   "Error: Device is in use and cannot be enslaved\n");
+		return -EBUSY;
+	}
+
+	if (bond_dev == slave_dev) {
+		NL_SET_ERR_MSG(extack, "Cannot enslave bond to itself.");
+		netdev_err(bond_dev, "cannot enslave bond to itself.\n");
+		return -EPERM;
+	}
+
+	/* vlan challenged mutual exclusion */
+	/* no need to lock since we're protected by rtnl_lock */
+	if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
+		netdev_dbg(bond_dev, "%s is NETIF_F_VLAN_CHALLENGED\n",
+			   slave_dev->name);
+		if (vlan_uses_dev(bond_dev)) {
+			NL_SET_ERR_MSG(extack, "Can not enslave VLAN challenged device to VLAN enabled bond");
+			netdev_err(bond_dev, "Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
+				   slave_dev->name, bond_dev->name);
+			return -EPERM;
+		} else {
+			netdev_warn(bond_dev, "enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
+				    slave_dev->name, slave_dev->name,
+				    bond_dev->name);
+		}
+	} else {
+		netdev_dbg(bond_dev, "%s is !NETIF_F_VLAN_CHALLENGED\n",
+			   slave_dev->name);
+	}
+
+	/* Old ifenslave binaries are no longer supported.  These can
+	 * be identified with moderate accuracy by the state of the slave:
+	 * the current ifenslave will set the interface down prior to
+	 * enslaving it; the old ifenslave will not.
+	 */
+	if (slave_dev->flags & IFF_UP) {
+		NL_SET_ERR_MSG(extack, "Device can not be enslaved while up");
+		netdev_err(bond_dev, "%s is up - this may be due to an out of date ifenslave\n",
+			   slave_dev->name);
+		return -EPERM;
+	}
+
+	/* set bonding device ether type by slave - bonding netdevices are
+	 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
+	 * there is a need to override some of the type dependent attribs/funcs.
+	 *
+	 * bond ether type mutual exclusion - don't allow slaves of dissimilar
+	 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
+	 */
+	if (!bond_has_slaves(bond)) {
+		if (bond_dev->type != slave_dev->type) {
+			netdev_dbg(bond_dev, "change device type from %d to %d\n",
+				   bond_dev->type, slave_dev->type);
+
+			res = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE,
+						       bond_dev);
+			res = notifier_to_errno(res);
+			if (res) {
+				netdev_err(bond_dev, "refused to change device type\n");
+				return -EBUSY;
+			}
+
+			/* Flush unicast and multicast addresses */
+			dev_uc_flush(bond_dev);
+			dev_mc_flush(bond_dev);
+
+			if (slave_dev->type != ARPHRD_ETHER)
+				bond_setup_by_slave(bond_dev, slave_dev);
+			else {
+				ether_setup(bond_dev);
+				bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING;
+			}
+
+			call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE,
+						 bond_dev);
+		}
+	} else if (bond_dev->type != slave_dev->type) {
+		NL_SET_ERR_MSG(extack, "Device type is different from other slaves");
+		netdev_err(bond_dev, "%s ether type (%d) is different from other slaves (%d), can not enslave it\n",
+			   slave_dev->name, slave_dev->type, bond_dev->type);
+		return -EINVAL;
+	}
+
+	if (slave_dev->type == ARPHRD_INFINIBAND &&
+	    BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
+		NL_SET_ERR_MSG(extack, "Only active-backup mode is supported for infiniband slaves");
+		netdev_warn(bond_dev, "Type (%d) supports only active-backup mode\n",
+			    slave_dev->type);
+		res = -EOPNOTSUPP;
+		goto err_undo_flags;
+	}
+
+	if (!slave_ops->ndo_set_mac_address ||
+	    slave_dev->type == ARPHRD_INFINIBAND) {
+		netdev_warn(bond_dev, "The slave device specified does not support setting the MAC address\n");
+		if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
+		    bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
+			if (!bond_has_slaves(bond)) {
+				bond->params.fail_over_mac = BOND_FOM_ACTIVE;
+				netdev_warn(bond_dev, "Setting fail_over_mac to active for active-backup mode\n");
+			} else {
+				NL_SET_ERR_MSG(extack, "Slave device does not support setting the MAC address, but fail_over_mac is not set to active");
+				netdev_err(bond_dev, "The slave device specified does not support setting the MAC address, but fail_over_mac is not set to active\n");
+				res = -EOPNOTSUPP;
+				goto err_undo_flags;
+			}
+		}
+	}
+
+	call_netdevice_notifiers(NETDEV_JOIN, slave_dev);
+
+	/* If this is the first slave, then we need to set the master's hardware
+	 * address to be the same as the slave's.
+	 */
+	if (!bond_has_slaves(bond) &&
+	    bond->dev->addr_assign_type == NET_ADDR_RANDOM)
+		bond_set_dev_addr(bond->dev, slave_dev);
+
+	new_slave = bond_alloc_slave(bond, slave_dev);
+	if (!new_slave) {
+		res = -ENOMEM;
+		goto err_undo_flags;
+	}
+
+	/* Set the new_slave's queue_id to be zero.  Queue ID mapping
+	 * is set via sysfs or module option if desired.
+	 */
+	new_slave->queue_id = 0;
+
+	/* Save slave's original mtu and then set it to match the bond */
+	new_slave->original_mtu = slave_dev->mtu;
+	res = dev_set_mtu(slave_dev, bond->dev->mtu);
+	if (res) {
+		netdev_dbg(bond_dev, "Error %d calling dev_set_mtu\n", res);
+		goto err_free;
+	}
+
+	/* Save slave's original ("permanent") mac address for modes
+	 * that need it, and for restoring it upon release, and then
+	 * set it to the master's address
+	 */
+	bond_hw_addr_copy(new_slave->perm_hwaddr, slave_dev->dev_addr,
+			  slave_dev->addr_len);
+
+	if (!bond->params.fail_over_mac ||
+	    BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
+		/* Set slave to master's mac address.  The application already
+		 * set the master's mac address to that of the first slave
+		 */
+		memcpy(ss.__data, bond_dev->dev_addr, bond_dev->addr_len);
+		ss.ss_family = slave_dev->type;
+		res = dev_set_mac_address(slave_dev, (struct sockaddr *)&ss);
+		if (res) {
+			netdev_dbg(bond_dev, "Error %d calling set_mac_address\n", res);
+			goto err_restore_mtu;
+		}
+	}
+
+	/* set slave flag before open to prevent IPv6 addrconf */
+	slave_dev->flags |= IFF_SLAVE;
+
+	/* open the slave since the application closed it */
+	res = dev_open(slave_dev);
+	if (res) {
+		netdev_dbg(bond_dev, "Opening slave %s failed\n", slave_dev->name);
+		goto err_restore_mac;
+	}
+
+	slave_dev->priv_flags |= IFF_BONDING;
+	/* initialize slave stats */
+	dev_get_stats(new_slave->dev, &new_slave->slave_stats);
+
+	if (bond_is_lb(bond)) {
+		/* bond_alb_init_slave() must be called before all other stages since
+		 * it might fail and we do not want to have to undo everything
+		 */
+		res = bond_alb_init_slave(bond, new_slave);
+		if (res)
+			goto err_close;
+	}
+
+	res = vlan_vids_add_by_dev(slave_dev, bond_dev);
+	if (res) {
+		netdev_err(bond_dev, "Couldn't add bond vlan ids to %s\n",
+			   slave_dev->name);
+		goto err_close;
+	}
+
+	prev_slave = bond_last_slave(bond);
+
+	new_slave->delay = 0;
+	new_slave->link_failure_count = 0;
+
+	if (bond_update_speed_duplex(new_slave) &&
+	    bond_needs_speed_duplex(bond))
+		new_slave->link = BOND_LINK_DOWN;
+
+	new_slave->last_rx = jiffies -
+		(msecs_to_jiffies(bond->params.arp_interval) + 1);
+	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
+		new_slave->target_last_arp_rx[i] = new_slave->last_rx;
+
+	if (bond->params.miimon && !bond->params.use_carrier) {
+		link_reporting = bond_check_dev_link(bond, slave_dev, 1);
+
+		if ((link_reporting == -1) && !bond->params.arp_interval) {
+			/* miimon is set but a bonded network driver
+			 * does not support ETHTOOL/MII and
+			 * arp_interval is not set.  Note: if
+			 * use_carrier is enabled, we will never go
+			 * here (because netif_carrier is always
+			 * supported); thus, we don't need to change
+			 * the messages for netif_carrier.
+			 */
+			netdev_warn(bond_dev, "MII and ETHTOOL support not available for interface %s, and arp_interval/arp_ip_target module parameters not specified, thus bonding will not detect link failures! see bonding.txt for details\n",
+				    slave_dev->name);
+		} else if (link_reporting == -1) {
+			/* unable get link status using mii/ethtool */
+			netdev_warn(bond_dev, "can't get link status from interface %s; the network driver associated with this interface does not support MII or ETHTOOL link status reporting, thus miimon has no effect on this interface\n",
+				    slave_dev->name);
+		}
+	}
+
+	/* check for initial state */
+	new_slave->link = BOND_LINK_NOCHANGE;
+	if (bond->params.miimon) {
+		if (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS) {
+			if (bond->params.updelay) {
+				bond_set_slave_link_state(new_slave,
+							  BOND_LINK_BACK,
+							  BOND_SLAVE_NOTIFY_NOW);
+				new_slave->delay = bond->params.updelay;
+			} else {
+				bond_set_slave_link_state(new_slave,
+							  BOND_LINK_UP,
+							  BOND_SLAVE_NOTIFY_NOW);
+			}
+		} else {
+			bond_set_slave_link_state(new_slave, BOND_LINK_DOWN,
+						  BOND_SLAVE_NOTIFY_NOW);
+		}
+	} else if (bond->params.arp_interval) {
+		bond_set_slave_link_state(new_slave,
+					  (netif_carrier_ok(slave_dev) ?
+					  BOND_LINK_UP : BOND_LINK_DOWN),
+					  BOND_SLAVE_NOTIFY_NOW);
+	} else {
+		bond_set_slave_link_state(new_slave, BOND_LINK_UP,
+					  BOND_SLAVE_NOTIFY_NOW);
+	}
+
+	if (new_slave->link != BOND_LINK_DOWN)
+		new_slave->last_link_up = jiffies;
+	netdev_dbg(bond_dev, "Initial state of slave_dev is BOND_LINK_%s\n",
+		   new_slave->link == BOND_LINK_DOWN ? "DOWN" :
+		   (new_slave->link == BOND_LINK_UP ? "UP" : "BACK"));
+
+	if (bond_uses_primary(bond) && bond->params.primary[0]) {
+		/* if there is a primary slave, remember it */
+		if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
+			rcu_assign_pointer(bond->primary_slave, new_slave);
+			bond->force_primary = true;
+		}
+	}
+
+	switch (BOND_MODE(bond)) {
+	case BOND_MODE_ACTIVEBACKUP:
+		bond_set_slave_inactive_flags(new_slave,
+					      BOND_SLAVE_NOTIFY_NOW);
+		break;
+	case BOND_MODE_8023AD:
+		/* in 802.3ad mode, the internal mechanism
+		 * will activate the slaves in the selected
+		 * aggregator
+		 */
+		bond_set_slave_inactive_flags(new_slave, BOND_SLAVE_NOTIFY_NOW);
+		/* if this is the first slave */
+		if (!prev_slave) {
+			SLAVE_AD_INFO(new_slave)->id = 1;
+			/* Initialize AD with the number of times that the AD timer is called in 1 second
+			 * can be called only after the mac address of the bond is set
+			 */
+			bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL);
+		} else {
+			SLAVE_AD_INFO(new_slave)->id =
+				SLAVE_AD_INFO(prev_slave)->id + 1;
+		}
+
+		bond_3ad_bind_slave(new_slave);
+		break;
+	case BOND_MODE_TLB:
+	case BOND_MODE_ALB:
+		bond_set_active_slave(new_slave);
+		bond_set_slave_inactive_flags(new_slave, BOND_SLAVE_NOTIFY_NOW);
+		break;
+	default:
+		netdev_dbg(bond_dev, "This slave is always active in trunk mode\n");
+
+		/* always active in trunk mode */
+		bond_set_active_slave(new_slave);
+
+		/* In trunking mode there is little meaning to curr_active_slave
+		 * anyway (it holds no special properties of the bond device),
+		 * so we can change it without calling change_active_interface()
+		 */
+		if (!rcu_access_pointer(bond->curr_active_slave) &&
+		    new_slave->link == BOND_LINK_UP)
+			rcu_assign_pointer(bond->curr_active_slave, new_slave);
+
+		break;
+	} /* switch(bond_mode) */
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	if (bond->dev->npinfo) {
+		if (slave_enable_netpoll(new_slave)) {
+			netdev_info(bond_dev, "master_dev is using netpoll, but new slave device does not support netpoll\n");
+			res = -EBUSY;
+			goto err_detach;
+		}
+	}
+#endif
+
+	if (!(bond_dev->features & NETIF_F_LRO))
+		dev_disable_lro(slave_dev);
+
+	res = netdev_rx_handler_register(slave_dev, bond_handle_frame,
+					 new_slave);
+	if (res) {
+		netdev_dbg(bond_dev, "Error %d calling netdev_rx_handler_register\n", res);
+		goto err_detach;
+	}
+
+	res = bond_master_upper_dev_link(bond, new_slave, extack);
+	if (res) {
+		netdev_dbg(bond_dev, "Error %d calling bond_master_upper_dev_link\n", res);
+		goto err_unregister;
+	}
+
+	res = bond_sysfs_slave_add(new_slave);
+	if (res) {
+		netdev_dbg(bond_dev, "Error %d calling bond_sysfs_slave_add\n", res);
+		goto err_upper_unlink;
+	}
+
+	bond->nest_level = dev_get_nest_level(bond_dev) + 1;
+
+	/* If the mode uses primary, then the following is handled by
+	 * bond_change_active_slave().
+	 */
+	if (!bond_uses_primary(bond)) {
+		/* set promiscuity level to new slave */
+		if (bond_dev->flags & IFF_PROMISC) {
+			res = dev_set_promiscuity(slave_dev, 1);
+			if (res)
+				goto err_sysfs_del;
+		}
+
+		/* set allmulti level to new slave */
+		if (bond_dev->flags & IFF_ALLMULTI) {
+			res = dev_set_allmulti(slave_dev, 1);
+			if (res) {
+				if (bond_dev->flags & IFF_PROMISC)
+					dev_set_promiscuity(slave_dev, -1);
+				goto err_sysfs_del;
+			}
+		}
+
+		netif_addr_lock_bh(bond_dev);
+		dev_mc_sync_multiple(slave_dev, bond_dev);
+		dev_uc_sync_multiple(slave_dev, bond_dev);
+		netif_addr_unlock_bh(bond_dev);
+
+		if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+			/* add lacpdu mc addr to mc list */
+			u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
+
+			dev_mc_add(slave_dev, lacpdu_multicast);
+		}
+	}
+
+	bond->slave_cnt++;
+	bond_compute_features(bond);
+	bond_set_carrier(bond);
+
+	if (bond_uses_primary(bond)) {
+		block_netpoll_tx();
+		bond_select_active_slave(bond);
+		unblock_netpoll_tx();
+	}
+
+	if (bond_mode_can_use_xmit_hash(bond))
+		bond_update_slave_arr(bond, NULL);
+
+
+	netdev_info(bond_dev, "Enslaving %s as %s interface with %s link\n",
+		    slave_dev->name,
+		    bond_is_active_slave(new_slave) ? "an active" : "a backup",
+		    new_slave->link != BOND_LINK_DOWN ? "an up" : "a down");
+
+	/* enslave is successful */
+	bond_queue_slave_event(new_slave);
+	return 0;
+
+/* Undo stages on error */
+err_sysfs_del:
+	bond_sysfs_slave_del(new_slave);
+
+err_upper_unlink:
+	bond_upper_dev_unlink(bond, new_slave);
+
+err_unregister:
+	netdev_rx_handler_unregister(slave_dev);
+
+err_detach:
+	vlan_vids_del_by_dev(slave_dev, bond_dev);
+	if (rcu_access_pointer(bond->primary_slave) == new_slave)
+		RCU_INIT_POINTER(bond->primary_slave, NULL);
+	if (rcu_access_pointer(bond->curr_active_slave) == new_slave) {
+		block_netpoll_tx();
+		bond_change_active_slave(bond, NULL);
+		bond_select_active_slave(bond);
+		unblock_netpoll_tx();
+	}
+	/* either primary_slave or curr_active_slave might've changed */
+	synchronize_rcu();
+	slave_disable_netpoll(new_slave);
+
+err_close:
+	if (!netif_is_bond_master(slave_dev))
+		slave_dev->priv_flags &= ~IFF_BONDING;
+	dev_close(slave_dev);
+
+err_restore_mac:
+	slave_dev->flags &= ~IFF_SLAVE;
+	if (!bond->params.fail_over_mac ||
+	    BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
+		/* XXX TODO - fom follow mode needs to change master's
+		 * MAC if this slave's MAC is in use by the bond, or at
+		 * least print a warning.
+		 */
+		bond_hw_addr_copy(ss.__data, new_slave->perm_hwaddr,
+				  new_slave->dev->addr_len);
+		ss.ss_family = slave_dev->type;
+		dev_set_mac_address(slave_dev, (struct sockaddr *)&ss);
+	}
+
+err_restore_mtu:
+	dev_set_mtu(slave_dev, new_slave->original_mtu);
+
+err_free:
+	kobject_put(&new_slave->kobj);
+
+err_undo_flags:
+	/* Enslave of first slave has failed and we need to fix master's mac */
+	if (!bond_has_slaves(bond)) {
+		if (ether_addr_equal_64bits(bond_dev->dev_addr,
+					    slave_dev->dev_addr))
+			eth_hw_addr_random(bond_dev);
+		if (bond_dev->type != ARPHRD_ETHER) {
+			dev_close(bond_dev);
+			ether_setup(bond_dev);
+			bond_dev->flags |= IFF_MASTER;
+			bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING;
+		}
+	}
+
+	return res;
+}
+
+/* Try to release the slave device <slave> from the bond device <master>
+ * It is legal to access curr_active_slave without a lock because all the function
+ * is RTNL-locked. If "all" is true it means that the function is being called
+ * while destroying a bond interface and all slaves are being released.
+ *
+ * The rules for slave state should be:
+ *   for Active/Backup:
+ *     Active stays on all backups go down
+ *   for Bonded connections:
+ *     The first up interface should be left on and all others downed.
+ */
+static int __bond_release_one(struct net_device *bond_dev,
+			      struct net_device *slave_dev,
+			      bool all, bool unregister)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct slave *slave, *oldcurrent;
+	struct sockaddr_storage ss;
+	int old_flags = bond_dev->flags;
+	netdev_features_t old_features = bond_dev->features;
+
+	/* slave is not a slave or master is not master of this slave */
+	if (!(slave_dev->flags & IFF_SLAVE) ||
+	    !netdev_has_upper_dev(slave_dev, bond_dev)) {
+		netdev_dbg(bond_dev, "cannot release %s\n",
+			   slave_dev->name);
+		return -EINVAL;
+	}
+
+	block_netpoll_tx();
+
+	slave = bond_get_slave_by_dev(bond, slave_dev);
+	if (!slave) {
+		/* not a slave of this bond */
+		netdev_info(bond_dev, "%s not enslaved\n",
+			    slave_dev->name);
+		unblock_netpoll_tx();
+		return -EINVAL;
+	}
+
+	bond_set_slave_inactive_flags(slave, BOND_SLAVE_NOTIFY_NOW);
+
+	bond_sysfs_slave_del(slave);
+
+	/* recompute stats just before removing the slave */
+	bond_get_stats(bond->dev, &bond->bond_stats);
+
+	/* unregister rx_handler early so bond_handle_frame wouldn't be called
+	 * for this slave anymore.
+	 */
+	netdev_rx_handler_unregister(slave_dev);
+
+	if (BOND_MODE(bond) == BOND_MODE_8023AD)
+		bond_3ad_unbind_slave(slave);
+
+	bond_upper_dev_unlink(bond, slave);
+
+	if (bond_mode_can_use_xmit_hash(bond))
+		bond_update_slave_arr(bond, slave);
+
+	netdev_info(bond_dev, "Releasing %s interface %s\n",
+		    bond_is_active_slave(slave) ? "active" : "backup",
+		    slave_dev->name);
+
+	oldcurrent = rcu_access_pointer(bond->curr_active_slave);
+
+	RCU_INIT_POINTER(bond->current_arp_slave, NULL);
+
+	if (!all && (!bond->params.fail_over_mac ||
+		     BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP)) {
+		if (ether_addr_equal_64bits(bond_dev->dev_addr, slave->perm_hwaddr) &&
+		    bond_has_slaves(bond))
+			netdev_warn(bond_dev, "the permanent HWaddr of %s - %pM - is still in use by %s - set the HWaddr of %s to a different address to avoid conflicts\n",
+				    slave_dev->name, slave->perm_hwaddr,
+				    bond_dev->name, slave_dev->name);
+	}
+
+	if (rtnl_dereference(bond->primary_slave) == slave)
+		RCU_INIT_POINTER(bond->primary_slave, NULL);
+
+	if (oldcurrent == slave)
+		bond_change_active_slave(bond, NULL);
+
+	if (bond_is_lb(bond)) {
+		/* Must be called only after the slave has been
+		 * detached from the list and the curr_active_slave
+		 * has been cleared (if our_slave == old_current),
+		 * but before a new active slave is selected.
+		 */
+		bond_alb_deinit_slave(bond, slave);
+	}
+
+	if (all) {
+		RCU_INIT_POINTER(bond->curr_active_slave, NULL);
+	} else if (oldcurrent == slave) {
+		/* Note that we hold RTNL over this sequence, so there
+		 * is no concern that another slave add/remove event
+		 * will interfere.
+		 */
+		bond_select_active_slave(bond);
+	}
+
+	if (!bond_has_slaves(bond)) {
+		bond_set_carrier(bond);
+		eth_hw_addr_random(bond_dev);
+		bond->nest_level = SINGLE_DEPTH_NESTING;
+	} else {
+		bond->nest_level = dev_get_nest_level(bond_dev) + 1;
+	}
+
+	unblock_netpoll_tx();
+	synchronize_rcu();
+	bond->slave_cnt--;
+
+	if (!bond_has_slaves(bond)) {
+		call_netdevice_notifiers(NETDEV_CHANGEADDR, bond->dev);
+		call_netdevice_notifiers(NETDEV_RELEASE, bond->dev);
+	}
+
+	bond_compute_features(bond);
+	if (!(bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
+	    (old_features & NETIF_F_VLAN_CHALLENGED))
+		netdev_info(bond_dev, "last VLAN challenged slave %s left bond %s - VLAN blocking is removed\n",
+			    slave_dev->name, bond_dev->name);
+
+	vlan_vids_del_by_dev(slave_dev, bond_dev);
+
+	/* If the mode uses primary, then this case was handled above by
+	 * bond_change_active_slave(..., NULL)
+	 */
+	if (!bond_uses_primary(bond)) {
+		/* unset promiscuity level from slave
+		 * NOTE: The NETDEV_CHANGEADDR call above may change the value
+		 * of the IFF_PROMISC flag in the bond_dev, but we need the
+		 * value of that flag before that change, as that was the value
+		 * when this slave was attached, so we cache at the start of the
+		 * function and use it here. Same goes for ALLMULTI below
+		 */
+		if (old_flags & IFF_PROMISC)
+			dev_set_promiscuity(slave_dev, -1);
+
+		/* unset allmulti level from slave */
+		if (old_flags & IFF_ALLMULTI)
+			dev_set_allmulti(slave_dev, -1);
+
+		bond_hw_addr_flush(bond_dev, slave_dev);
+	}
+
+	slave_disable_netpoll(slave);
+
+	/* close slave before restoring its mac address */
+	dev_close(slave_dev);
+
+	if (bond->params.fail_over_mac != BOND_FOM_ACTIVE ||
+	    BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
+		/* restore original ("permanent") mac address */
+		bond_hw_addr_copy(ss.__data, slave->perm_hwaddr,
+				  slave->dev->addr_len);
+		ss.ss_family = slave_dev->type;
+		dev_set_mac_address(slave_dev, (struct sockaddr *)&ss);
+	}
+
+	if (unregister)
+		__dev_set_mtu(slave_dev, slave->original_mtu);
+	else
+		dev_set_mtu(slave_dev, slave->original_mtu);
+
+	if (!netif_is_bond_master(slave_dev))
+		slave_dev->priv_flags &= ~IFF_BONDING;
+
+	kobject_put(&slave->kobj);
+
+	return 0;
+}
+
+/* A wrapper used because of ndo_del_link */
+int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
+{
+	return __bond_release_one(bond_dev, slave_dev, false, false);
+}
+
+/* First release a slave and then destroy the bond if no more slaves are left.
+ * Must be under rtnl_lock when this function is called.
+ */
+static int  bond_release_and_destroy(struct net_device *bond_dev,
+				     struct net_device *slave_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	int ret;
+
+	ret = __bond_release_one(bond_dev, slave_dev, false, true);
+	if (ret == 0 && !bond_has_slaves(bond) &&
+	    bond_dev->reg_state != NETREG_UNREGISTERING) {
+		bond_dev->priv_flags |= IFF_DISABLE_NETPOLL;
+		netdev_info(bond_dev, "Destroying bond %s\n",
+			    bond_dev->name);
+		bond_remove_proc_entry(bond);
+		unregister_netdevice(bond_dev);
+	}
+	return ret;
+}
+
+static void bond_info_query(struct net_device *bond_dev, struct ifbond *info)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	bond_fill_ifbond(bond, info);
+}
+
+static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct list_head *iter;
+	int i = 0, res = -ENODEV;
+	struct slave *slave;
+
+	bond_for_each_slave(bond, slave, iter) {
+		if (i++ == (int)info->slave_id) {
+			res = 0;
+			bond_fill_ifslave(slave, info);
+			break;
+		}
+	}
+
+	return res;
+}
+
+/*-------------------------------- Monitoring -------------------------------*/
+
+/* called with rcu_read_lock() */
+static int bond_miimon_inspect(struct bonding *bond)
+{
+	int link_state, commit = 0;
+	struct list_head *iter;
+	struct slave *slave;
+	bool ignore_updelay;
+
+	ignore_updelay = !rcu_dereference(bond->curr_active_slave);
+
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		bond_propose_link_state(slave, BOND_LINK_NOCHANGE);
+
+		link_state = bond_check_dev_link(bond, slave->dev, 0);
+
+		switch (slave->link) {
+		case BOND_LINK_UP:
+			if (link_state)
+				continue;
+
+			bond_propose_link_state(slave, BOND_LINK_FAIL);
+			commit++;
+			slave->delay = bond->params.downdelay;
+			if (slave->delay) {
+				netdev_info(bond->dev, "link status down for %sinterface %s, disabling it in %d ms\n",
+					    (BOND_MODE(bond) ==
+					     BOND_MODE_ACTIVEBACKUP) ?
+					     (bond_is_active_slave(slave) ?
+					      "active " : "backup ") : "",
+					    slave->dev->name,
+					    bond->params.downdelay * bond->params.miimon);
+			}
+			/*FALLTHRU*/
+		case BOND_LINK_FAIL:
+			if (link_state) {
+				/* recovered before downdelay expired */
+				bond_propose_link_state(slave, BOND_LINK_UP);
+				slave->last_link_up = jiffies;
+				netdev_info(bond->dev, "link status up again after %d ms for interface %s\n",
+					    (bond->params.downdelay - slave->delay) *
+					    bond->params.miimon,
+					    slave->dev->name);
+				commit++;
+				continue;
+			}
+
+			if (slave->delay <= 0) {
+				bond_propose_link_state(slave, BOND_LINK_DOWN);
+				commit++;
+				continue;
+			}
+
+			slave->delay--;
+			break;
+
+		case BOND_LINK_DOWN:
+			if (!link_state)
+				continue;
+
+			bond_propose_link_state(slave, BOND_LINK_BACK);
+			commit++;
+			slave->delay = bond->params.updelay;
+
+			if (slave->delay) {
+				netdev_info(bond->dev, "link status up for interface %s, enabling it in %d ms\n",
+					    slave->dev->name,
+					    ignore_updelay ? 0 :
+					    bond->params.updelay *
+					    bond->params.miimon);
+			}
+			/*FALLTHRU*/
+		case BOND_LINK_BACK:
+			if (!link_state) {
+				bond_propose_link_state(slave, BOND_LINK_DOWN);
+				netdev_info(bond->dev, "link status down again after %d ms for interface %s\n",
+					    (bond->params.updelay - slave->delay) *
+					    bond->params.miimon,
+					    slave->dev->name);
+				commit++;
+				continue;
+			}
+
+			if (ignore_updelay)
+				slave->delay = 0;
+
+			if (slave->delay <= 0) {
+				bond_propose_link_state(slave, BOND_LINK_UP);
+				commit++;
+				ignore_updelay = false;
+				continue;
+			}
+
+			slave->delay--;
+			break;
+		}
+	}
+
+	return commit;
+}
+
+static void bond_miimon_link_change(struct bonding *bond,
+				    struct slave *slave,
+				    char link)
+{
+	switch (BOND_MODE(bond)) {
+	case BOND_MODE_8023AD:
+		bond_3ad_handle_link_change(slave, link);
+		break;
+	case BOND_MODE_TLB:
+	case BOND_MODE_ALB:
+		bond_alb_handle_link_change(bond, slave, link);
+		break;
+	case BOND_MODE_XOR:
+		bond_update_slave_arr(bond, NULL);
+		break;
+	}
+}
+
+static void bond_miimon_commit(struct bonding *bond)
+{
+	struct list_head *iter;
+	struct slave *slave, *primary;
+
+	bond_for_each_slave(bond, slave, iter) {
+		switch (slave->link_new_state) {
+		case BOND_LINK_NOCHANGE:
+			/* For 802.3ad mode, check current slave speed and
+			 * duplex again in case its port was disabled after
+			 * invalid speed/duplex reporting but recovered before
+			 * link monitoring could make a decision on the actual
+			 * link status
+			 */
+			if (BOND_MODE(bond) == BOND_MODE_8023AD &&
+			    slave->link == BOND_LINK_UP)
+				bond_3ad_adapter_speed_duplex_changed(slave);
+			continue;
+
+		case BOND_LINK_UP:
+			if (bond_update_speed_duplex(slave) &&
+			    bond_needs_speed_duplex(bond)) {
+				slave->link = BOND_LINK_DOWN;
+				if (net_ratelimit())
+					netdev_warn(bond->dev,
+						    "failed to get link speed/duplex for %s\n",
+						    slave->dev->name);
+				continue;
+			}
+			bond_set_slave_link_state(slave, BOND_LINK_UP,
+						  BOND_SLAVE_NOTIFY_NOW);
+			slave->last_link_up = jiffies;
+
+			primary = rtnl_dereference(bond->primary_slave);
+			if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+				/* prevent it from being the active one */
+				bond_set_backup_slave(slave);
+			} else if (BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
+				/* make it immediately active */
+				bond_set_active_slave(slave);
+			}
+
+			netdev_info(bond->dev, "link status definitely up for interface %s, %u Mbps %s duplex\n",
+				    slave->dev->name,
+				    slave->speed == SPEED_UNKNOWN ? 0 : slave->speed,
+				    slave->duplex ? "full" : "half");
+
+			bond_miimon_link_change(bond, slave, BOND_LINK_UP);
+
+			if (!bond->curr_active_slave || slave == primary)
+				goto do_failover;
+
+			continue;
+
+		case BOND_LINK_DOWN:
+			if (slave->link_failure_count < UINT_MAX)
+				slave->link_failure_count++;
+
+			bond_set_slave_link_state(slave, BOND_LINK_DOWN,
+						  BOND_SLAVE_NOTIFY_NOW);
+
+			if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
+			    BOND_MODE(bond) == BOND_MODE_8023AD)
+				bond_set_slave_inactive_flags(slave,
+							      BOND_SLAVE_NOTIFY_NOW);
+
+			netdev_info(bond->dev, "link status definitely down for interface %s, disabling it\n",
+				    slave->dev->name);
+
+			bond_miimon_link_change(bond, slave, BOND_LINK_DOWN);
+
+			if (slave == rcu_access_pointer(bond->curr_active_slave))
+				goto do_failover;
+
+			continue;
+
+		default:
+			netdev_err(bond->dev, "invalid new link %d on slave %s\n",
+				   slave->link_new_state, slave->dev->name);
+			bond_propose_link_state(slave, BOND_LINK_NOCHANGE);
+
+			continue;
+		}
+
+do_failover:
+		block_netpoll_tx();
+		bond_select_active_slave(bond);
+		unblock_netpoll_tx();
+	}
+
+	bond_set_carrier(bond);
+}
+
+/* bond_mii_monitor
+ *
+ * Really a wrapper that splits the mii monitor into two phases: an
+ * inspection, then (if inspection indicates something needs to be done)
+ * an acquisition of appropriate locks followed by a commit phase to
+ * implement whatever link state changes are indicated.
+ */
+static void bond_mii_monitor(struct work_struct *work)
+{
+	struct bonding *bond = container_of(work, struct bonding,
+					    mii_work.work);
+	bool should_notify_peers = false;
+	unsigned long delay;
+	struct slave *slave;
+	struct list_head *iter;
+
+	delay = msecs_to_jiffies(bond->params.miimon);
+
+	if (!bond_has_slaves(bond))
+		goto re_arm;
+
+	rcu_read_lock();
+
+	should_notify_peers = bond_should_notify_peers(bond);
+
+	if (bond_miimon_inspect(bond)) {
+		rcu_read_unlock();
+
+		/* Race avoidance with bond_close cancel of workqueue */
+		if (!rtnl_trylock()) {
+			delay = 1;
+			should_notify_peers = false;
+			goto re_arm;
+		}
+
+		bond_for_each_slave(bond, slave, iter) {
+			bond_commit_link_state(slave, BOND_SLAVE_NOTIFY_LATER);
+		}
+		bond_miimon_commit(bond);
+
+		rtnl_unlock();	/* might sleep, hold no other locks */
+	} else
+		rcu_read_unlock();
+
+re_arm:
+	if (bond->params.miimon)
+		queue_delayed_work(bond->wq, &bond->mii_work, delay);
+
+	if (should_notify_peers) {
+		if (!rtnl_trylock())
+			return;
+		call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, bond->dev);
+		rtnl_unlock();
+	}
+}
+
+static int bond_upper_dev_walk(struct net_device *upper, void *data)
+{
+	__be32 ip = *((__be32 *)data);
+
+	return ip == bond_confirm_addr(upper, 0, ip);
+}
+
+static bool bond_has_this_ip(struct bonding *bond, __be32 ip)
+{
+	bool ret = false;
+
+	if (ip == bond_confirm_addr(bond->dev, 0, ip))
+		return true;
+
+	rcu_read_lock();
+	if (netdev_walk_all_upper_dev_rcu(bond->dev, bond_upper_dev_walk, &ip))
+		ret = true;
+	rcu_read_unlock();
+
+	return ret;
+}
+
+/* We go to the (large) trouble of VLAN tagging ARP frames because
+ * switches in VLAN mode (especially if ports are configured as
+ * "native" to a VLAN) might not pass non-tagged frames.
+ */
+static void bond_arp_send(struct net_device *slave_dev, int arp_op,
+			  __be32 dest_ip, __be32 src_ip,
+			  struct bond_vlan_tag *tags)
+{
+	struct sk_buff *skb;
+	struct bond_vlan_tag *outer_tag = tags;
+
+	netdev_dbg(slave_dev, "arp %d on slave %s: dst %pI4 src %pI4\n",
+		   arp_op, slave_dev->name, &dest_ip, &src_ip);
+
+	skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
+			 NULL, slave_dev->dev_addr, NULL);
+
+	if (!skb) {
+		net_err_ratelimited("ARP packet allocation failed\n");
+		return;
+	}
+
+	if (!tags || tags->vlan_proto == VLAN_N_VID)
+		goto xmit;
+
+	tags++;
+
+	/* Go through all the tags backwards and add them to the packet */
+	while (tags->vlan_proto != VLAN_N_VID) {
+		if (!tags->vlan_id) {
+			tags++;
+			continue;
+		}
+
+		netdev_dbg(slave_dev, "inner tag: proto %X vid %X\n",
+			   ntohs(outer_tag->vlan_proto), tags->vlan_id);
+		skb = vlan_insert_tag_set_proto(skb, tags->vlan_proto,
+						tags->vlan_id);
+		if (!skb) {
+			net_err_ratelimited("failed to insert inner VLAN tag\n");
+			return;
+		}
+
+		tags++;
+	}
+	/* Set the outer tag */
+	if (outer_tag->vlan_id) {
+		netdev_dbg(slave_dev, "outer tag: proto %X vid %X\n",
+			   ntohs(outer_tag->vlan_proto), outer_tag->vlan_id);
+		__vlan_hwaccel_put_tag(skb, outer_tag->vlan_proto,
+				       outer_tag->vlan_id);
+	}
+
+xmit:
+	arp_xmit(skb);
+}
+
+/* Validate the device path between the @start_dev and the @end_dev.
+ * The path is valid if the @end_dev is reachable through device
+ * stacking.
+ * When the path is validated, collect any vlan information in the
+ * path.
+ */
+struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
+					      struct net_device *end_dev,
+					      int level)
+{
+	struct bond_vlan_tag *tags;
+	struct net_device *upper;
+	struct list_head  *iter;
+
+	if (start_dev == end_dev) {
+		tags = kcalloc(level + 1, sizeof(*tags), GFP_ATOMIC);
+		if (!tags)
+			return ERR_PTR(-ENOMEM);
+		tags[level].vlan_proto = VLAN_N_VID;
+		return tags;
+	}
+
+	netdev_for_each_upper_dev_rcu(start_dev, upper, iter) {
+		tags = bond_verify_device_path(upper, end_dev, level + 1);
+		if (IS_ERR_OR_NULL(tags)) {
+			if (IS_ERR(tags))
+				return tags;
+			continue;
+		}
+		if (is_vlan_dev(upper)) {
+			tags[level].vlan_proto = vlan_dev_vlan_proto(upper);
+			tags[level].vlan_id = vlan_dev_vlan_id(upper);
+		}
+
+		return tags;
+	}
+
+	return NULL;
+}
+
+static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
+{
+	struct rtable *rt;
+	struct bond_vlan_tag *tags;
+	__be32 *targets = bond->params.arp_targets, addr;
+	int i;
+
+	for (i = 0; i < BOND_MAX_ARP_TARGETS && targets[i]; i++) {
+		netdev_dbg(bond->dev, "basa: target %pI4\n", &targets[i]);
+		tags = NULL;
+
+		/* Find out through which dev should the packet go */
+		rt = ip_route_output(dev_net(bond->dev), targets[i], 0,
+				     RTO_ONLINK, 0);
+		if (IS_ERR(rt)) {
+			/* there's no route to target - try to send arp
+			 * probe to generate any traffic (arp_validate=0)
+			 */
+			if (bond->params.arp_validate)
+				net_warn_ratelimited("%s: no route to arp_ip_target %pI4 and arp_validate is set\n",
+						     bond->dev->name,
+						     &targets[i]);
+			bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
+				      0, tags);
+			continue;
+		}
+
+		/* bond device itself */
+		if (rt->dst.dev == bond->dev)
+			goto found;
+
+		rcu_read_lock();
+		tags = bond_verify_device_path(bond->dev, rt->dst.dev, 0);
+		rcu_read_unlock();
+
+		if (!IS_ERR_OR_NULL(tags))
+			goto found;
+
+		/* Not our device - skip */
+		netdev_dbg(bond->dev, "no path to arp_ip_target %pI4 via rt.dev %s\n",
+			   &targets[i], rt->dst.dev ? rt->dst.dev->name : "NULL");
+
+		ip_rt_put(rt);
+		continue;
+
+found:
+		addr = bond_confirm_addr(rt->dst.dev, targets[i], 0);
+		ip_rt_put(rt);
+		bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
+			      addr, tags);
+		kfree(tags);
+	}
+}
+
+static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
+{
+	int i;
+
+	if (!sip || !bond_has_this_ip(bond, tip)) {
+		netdev_dbg(bond->dev, "bva: sip %pI4 tip %pI4 not found\n",
+			   &sip, &tip);
+		return;
+	}
+
+	i = bond_get_targets_ip(bond->params.arp_targets, sip);
+	if (i == -1) {
+		netdev_dbg(bond->dev, "bva: sip %pI4 not found in targets\n",
+			   &sip);
+		return;
+	}
+	slave->last_rx = jiffies;
+	slave->target_last_arp_rx[i] = jiffies;
+}
+
+int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond,
+		 struct slave *slave)
+{
+	struct arphdr *arp = (struct arphdr *)skb->data;
+	struct slave *curr_active_slave, *curr_arp_slave;
+	unsigned char *arp_ptr;
+	__be32 sip, tip;
+	int is_arp = skb->protocol == __cpu_to_be16(ETH_P_ARP);
+	unsigned int alen;
+
+	if (!slave_do_arp_validate(bond, slave)) {
+		if ((slave_do_arp_validate_only(bond) && is_arp) ||
+		    !slave_do_arp_validate_only(bond))
+			slave->last_rx = jiffies;
+		return RX_HANDLER_ANOTHER;
+	} else if (!is_arp) {
+		return RX_HANDLER_ANOTHER;
+	}
+
+	alen = arp_hdr_len(bond->dev);
+
+	netdev_dbg(bond->dev, "bond_arp_rcv: skb->dev %s\n",
+		   skb->dev->name);
+
+	if (alen > skb_headlen(skb)) {
+		arp = kmalloc(alen, GFP_ATOMIC);
+		if (!arp)
+			goto out_unlock;
+		if (skb_copy_bits(skb, 0, arp, alen) < 0)
+			goto out_unlock;
+	}
+
+	if (arp->ar_hln != bond->dev->addr_len ||
+	    skb->pkt_type == PACKET_OTHERHOST ||
+	    skb->pkt_type == PACKET_LOOPBACK ||
+	    arp->ar_hrd != htons(ARPHRD_ETHER) ||
+	    arp->ar_pro != htons(ETH_P_IP) ||
+	    arp->ar_pln != 4)
+		goto out_unlock;
+
+	arp_ptr = (unsigned char *)(arp + 1);
+	arp_ptr += bond->dev->addr_len;
+	memcpy(&sip, arp_ptr, 4);
+	arp_ptr += 4 + bond->dev->addr_len;
+	memcpy(&tip, arp_ptr, 4);
+
+	netdev_dbg(bond->dev, "bond_arp_rcv: %s/%d av %d sv %d sip %pI4 tip %pI4\n",
+		   slave->dev->name, bond_slave_state(slave),
+		     bond->params.arp_validate, slave_do_arp_validate(bond, slave),
+		     &sip, &tip);
+
+	curr_active_slave = rcu_dereference(bond->curr_active_slave);
+	curr_arp_slave = rcu_dereference(bond->current_arp_slave);
+
+	/* We 'trust' the received ARP enough to validate it if:
+	 *
+	 * (a) the slave receiving the ARP is active (which includes the
+	 * current ARP slave, if any), or
+	 *
+	 * (b) the receiving slave isn't active, but there is a currently
+	 * active slave and it received valid arp reply(s) after it became
+	 * the currently active slave, or
+	 *
+	 * (c) there is an ARP slave that sent an ARP during the prior ARP
+	 * interval, and we receive an ARP reply on any slave.  We accept
+	 * these because switch FDB update delays may deliver the ARP
+	 * reply to a slave other than the sender of the ARP request.
+	 *
+	 * Note: for (b), backup slaves are receiving the broadcast ARP
+	 * request, not a reply.  This request passes from the sending
+	 * slave through the L2 switch(es) to the receiving slave.  Since
+	 * this is checking the request, sip/tip are swapped for
+	 * validation.
+	 *
+	 * This is done to avoid endless looping when we can't reach the
+	 * arp_ip_target and fool ourselves with our own arp requests.
+	 */
+	if (bond_is_active_slave(slave))
+		bond_validate_arp(bond, slave, sip, tip);
+	else if (curr_active_slave &&
+		 time_after(slave_last_rx(bond, curr_active_slave),
+			    curr_active_slave->last_link_up))
+		bond_validate_arp(bond, slave, tip, sip);
+	else if (curr_arp_slave && (arp->ar_op == htons(ARPOP_REPLY)) &&
+		 bond_time_in_interval(bond,
+				       dev_trans_start(curr_arp_slave->dev), 1))
+		bond_validate_arp(bond, slave, sip, tip);
+
+out_unlock:
+	if (arp != (struct arphdr *)skb->data)
+		kfree(arp);
+	return RX_HANDLER_ANOTHER;
+}
+
+/* function to verify if we're in the arp_interval timeslice, returns true if
+ * (last_act - arp_interval) <= jiffies <= (last_act + mod * arp_interval +
+ * arp_interval/2) . the arp_interval/2 is needed for really fast networks.
+ */
+static bool bond_time_in_interval(struct bonding *bond, unsigned long last_act,
+				  int mod)
+{
+	int delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
+
+	return time_in_range(jiffies,
+			     last_act - delta_in_ticks,
+			     last_act + mod * delta_in_ticks + delta_in_ticks/2);
+}
+
+/* This function is called regularly to monitor each slave's link
+ * ensuring that traffic is being sent and received when arp monitoring
+ * is used in load-balancing mode. if the adapter has been dormant, then an
+ * arp is transmitted to generate traffic. see activebackup_arp_monitor for
+ * arp monitoring in active backup mode.
+ */
+static void bond_loadbalance_arp_mon(struct bonding *bond)
+{
+	struct slave *slave, *oldcurrent;
+	struct list_head *iter;
+	int do_failover = 0, slave_state_changed = 0;
+
+	if (!bond_has_slaves(bond))
+		goto re_arm;
+
+	rcu_read_lock();
+
+	oldcurrent = rcu_dereference(bond->curr_active_slave);
+	/* see if any of the previous devices are up now (i.e. they have
+	 * xmt and rcv traffic). the curr_active_slave does not come into
+	 * the picture unless it is null. also, slave->last_link_up is not
+	 * needed here because we send an arp on each slave and give a slave
+	 * as long as it needs to get the tx/rx within the delta.
+	 * TODO: what about up/down delay in arp mode? it wasn't here before
+	 *       so it can wait
+	 */
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		unsigned long trans_start = dev_trans_start(slave->dev);
+
+		bond_propose_link_state(slave, BOND_LINK_NOCHANGE);
+
+		if (slave->link != BOND_LINK_UP) {
+			if (bond_time_in_interval(bond, trans_start, 1) &&
+			    bond_time_in_interval(bond, slave->last_rx, 1)) {
+
+				bond_propose_link_state(slave, BOND_LINK_UP);
+				slave_state_changed = 1;
+
+				/* primary_slave has no meaning in round-robin
+				 * mode. the window of a slave being up and
+				 * curr_active_slave being null after enslaving
+				 * is closed.
+				 */
+				if (!oldcurrent) {
+					netdev_info(bond->dev, "link status definitely up for interface %s\n",
+						    slave->dev->name);
+					do_failover = 1;
+				} else {
+					netdev_info(bond->dev, "interface %s is now up\n",
+						    slave->dev->name);
+				}
+			}
+		} else {
+			/* slave->link == BOND_LINK_UP */
+
+			/* not all switches will respond to an arp request
+			 * when the source ip is 0, so don't take the link down
+			 * if we don't know our ip yet
+			 */
+			if (!bond_time_in_interval(bond, trans_start, 2) ||
+			    !bond_time_in_interval(bond, slave->last_rx, 2)) {
+
+				bond_propose_link_state(slave, BOND_LINK_DOWN);
+				slave_state_changed = 1;
+
+				if (slave->link_failure_count < UINT_MAX)
+					slave->link_failure_count++;
+
+				netdev_info(bond->dev, "interface %s is now down\n",
+					    slave->dev->name);
+
+				if (slave == oldcurrent)
+					do_failover = 1;
+			}
+		}
+
+		/* note: if switch is in round-robin mode, all links
+		 * must tx arp to ensure all links rx an arp - otherwise
+		 * links may oscillate or not come up at all; if switch is
+		 * in something like xor mode, there is nothing we can
+		 * do - all replies will be rx'ed on same link causing slaves
+		 * to be unstable during low/no traffic periods
+		 */
+		if (bond_slave_is_up(slave))
+			bond_arp_send_all(bond, slave);
+	}
+
+	rcu_read_unlock();
+
+	if (do_failover || slave_state_changed) {
+		if (!rtnl_trylock())
+			goto re_arm;
+
+		bond_for_each_slave(bond, slave, iter) {
+			if (slave->link_new_state != BOND_LINK_NOCHANGE)
+				slave->link = slave->link_new_state;
+		}
+
+		if (slave_state_changed) {
+			bond_slave_state_change(bond);
+			if (BOND_MODE(bond) == BOND_MODE_XOR)
+				bond_update_slave_arr(bond, NULL);
+		}
+		if (do_failover) {
+			block_netpoll_tx();
+			bond_select_active_slave(bond);
+			unblock_netpoll_tx();
+		}
+		rtnl_unlock();
+	}
+
+re_arm:
+	if (bond->params.arp_interval)
+		queue_delayed_work(bond->wq, &bond->arp_work,
+				   msecs_to_jiffies(bond->params.arp_interval));
+}
+
+/* Called to inspect slaves for active-backup mode ARP monitor link state
+ * changes.  Sets proposed link state in slaves to specify what action
+ * should take place for the slave.  Returns 0 if no changes are found, >0
+ * if changes to link states must be committed.
+ *
+ * Called with rcu_read_lock held.
+ */
+static int bond_ab_arp_inspect(struct bonding *bond)
+{
+	unsigned long trans_start, last_rx;
+	struct list_head *iter;
+	struct slave *slave;
+	int commit = 0;
+
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		bond_propose_link_state(slave, BOND_LINK_NOCHANGE);
+		last_rx = slave_last_rx(bond, slave);
+
+		if (slave->link != BOND_LINK_UP) {
+			if (bond_time_in_interval(bond, last_rx, 1)) {
+				bond_propose_link_state(slave, BOND_LINK_UP);
+				commit++;
+			} else if (slave->link == BOND_LINK_BACK) {
+				bond_propose_link_state(slave, BOND_LINK_FAIL);
+				commit++;
+			}
+			continue;
+		}
+
+		/* Give slaves 2*delta after being enslaved or made
+		 * active.  This avoids bouncing, as the last receive
+		 * times need a full ARP monitor cycle to be updated.
+		 */
+		if (bond_time_in_interval(bond, slave->last_link_up, 2))
+			continue;
+
+		/* Backup slave is down if:
+		 * - No current_arp_slave AND
+		 * - more than 3*delta since last receive AND
+		 * - the bond has an IP address
+		 *
+		 * Note: a non-null current_arp_slave indicates
+		 * the curr_active_slave went down and we are
+		 * searching for a new one; under this condition
+		 * we only take the curr_active_slave down - this
+		 * gives each slave a chance to tx/rx traffic
+		 * before being taken out
+		 */
+		if (!bond_is_active_slave(slave) &&
+		    !rcu_access_pointer(bond->current_arp_slave) &&
+		    !bond_time_in_interval(bond, last_rx, 3)) {
+			bond_propose_link_state(slave, BOND_LINK_DOWN);
+			commit++;
+		}
+
+		/* Active slave is down if:
+		 * - more than 2*delta since transmitting OR
+		 * - (more than 2*delta since receive AND
+		 *    the bond has an IP address)
+		 */
+		trans_start = dev_trans_start(slave->dev);
+		if (bond_is_active_slave(slave) &&
+		    (!bond_time_in_interval(bond, trans_start, 2) ||
+		     !bond_time_in_interval(bond, last_rx, 2))) {
+			bond_propose_link_state(slave, BOND_LINK_DOWN);
+			commit++;
+		}
+	}
+
+	return commit;
+}
+
+/* Called to commit link state changes noted by inspection step of
+ * active-backup mode ARP monitor.
+ *
+ * Called with RTNL hold.
+ */
+static void bond_ab_arp_commit(struct bonding *bond)
+{
+	unsigned long trans_start;
+	struct list_head *iter;
+	struct slave *slave;
+
+	bond_for_each_slave(bond, slave, iter) {
+		switch (slave->link_new_state) {
+		case BOND_LINK_NOCHANGE:
+			continue;
+
+		case BOND_LINK_UP:
+			trans_start = dev_trans_start(slave->dev);
+			if (rtnl_dereference(bond->curr_active_slave) != slave ||
+			    (!rtnl_dereference(bond->curr_active_slave) &&
+			     bond_time_in_interval(bond, trans_start, 1))) {
+				struct slave *current_arp_slave;
+
+				current_arp_slave = rtnl_dereference(bond->current_arp_slave);
+				bond_set_slave_link_state(slave, BOND_LINK_UP,
+							  BOND_SLAVE_NOTIFY_NOW);
+				if (current_arp_slave) {
+					bond_set_slave_inactive_flags(
+						current_arp_slave,
+						BOND_SLAVE_NOTIFY_NOW);
+					RCU_INIT_POINTER(bond->current_arp_slave, NULL);
+				}
+
+				netdev_info(bond->dev, "link status definitely up for interface %s\n",
+					    slave->dev->name);
+
+				if (!rtnl_dereference(bond->curr_active_slave) ||
+				    slave == rtnl_dereference(bond->primary_slave))
+					goto do_failover;
+
+			}
+
+			continue;
+
+		case BOND_LINK_DOWN:
+			if (slave->link_failure_count < UINT_MAX)
+				slave->link_failure_count++;
+
+			bond_set_slave_link_state(slave, BOND_LINK_DOWN,
+						  BOND_SLAVE_NOTIFY_NOW);
+			bond_set_slave_inactive_flags(slave,
+						      BOND_SLAVE_NOTIFY_NOW);
+
+			netdev_info(bond->dev, "link status definitely down for interface %s, disabling it\n",
+				    slave->dev->name);
+
+			if (slave == rtnl_dereference(bond->curr_active_slave)) {
+				RCU_INIT_POINTER(bond->current_arp_slave, NULL);
+				goto do_failover;
+			}
+
+			continue;
+
+		case BOND_LINK_FAIL:
+			bond_set_slave_link_state(slave, BOND_LINK_FAIL,
+						  BOND_SLAVE_NOTIFY_NOW);
+			bond_set_slave_inactive_flags(slave,
+						      BOND_SLAVE_NOTIFY_NOW);
+
+			/* A slave has just been enslaved and has become
+			 * the current active slave.
+			 */
+			if (rtnl_dereference(bond->curr_active_slave))
+				RCU_INIT_POINTER(bond->current_arp_slave, NULL);
+			continue;
+
+		default:
+			netdev_err(bond->dev, "impossible: new_link %d on slave %s\n",
+				   slave->link_new_state, slave->dev->name);
+			continue;
+		}
+
+do_failover:
+		block_netpoll_tx();
+		bond_select_active_slave(bond);
+		unblock_netpoll_tx();
+	}
+
+	bond_set_carrier(bond);
+}
+
+/* Send ARP probes for active-backup mode ARP monitor.
+ *
+ * Called with rcu_read_lock held.
+ */
+static bool bond_ab_arp_probe(struct bonding *bond)
+{
+	struct slave *slave, *before = NULL, *new_slave = NULL,
+		     *curr_arp_slave = rcu_dereference(bond->current_arp_slave),
+		     *curr_active_slave = rcu_dereference(bond->curr_active_slave);
+	struct list_head *iter;
+	bool found = false;
+	bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
+
+	if (curr_arp_slave && curr_active_slave)
+		netdev_info(bond->dev, "PROBE: c_arp %s && cas %s BAD\n",
+			    curr_arp_slave->dev->name,
+			    curr_active_slave->dev->name);
+
+	if (curr_active_slave) {
+		bond_arp_send_all(bond, curr_active_slave);
+		return should_notify_rtnl;
+	}
+
+	/* if we don't have a curr_active_slave, search for the next available
+	 * backup slave from the current_arp_slave and make it the candidate
+	 * for becoming the curr_active_slave
+	 */
+
+	if (!curr_arp_slave) {
+		curr_arp_slave = bond_first_slave_rcu(bond);
+		if (!curr_arp_slave)
+			return should_notify_rtnl;
+	}
+
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		if (!found && !before && bond_slave_is_up(slave))
+			before = slave;
+
+		if (found && !new_slave && bond_slave_is_up(slave))
+			new_slave = slave;
+		/* if the link state is up at this point, we
+		 * mark it down - this can happen if we have
+		 * simultaneous link failures and
+		 * reselect_active_interface doesn't make this
+		 * one the current slave so it is still marked
+		 * up when it is actually down
+		 */
+		if (!bond_slave_is_up(slave) && slave->link == BOND_LINK_UP) {
+			bond_set_slave_link_state(slave, BOND_LINK_DOWN,
+						  BOND_SLAVE_NOTIFY_LATER);
+			if (slave->link_failure_count < UINT_MAX)
+				slave->link_failure_count++;
+
+			bond_set_slave_inactive_flags(slave,
+						      BOND_SLAVE_NOTIFY_LATER);
+
+			netdev_info(bond->dev, "backup interface %s is now down\n",
+				    slave->dev->name);
+		}
+		if (slave == curr_arp_slave)
+			found = true;
+	}
+
+	if (!new_slave && before)
+		new_slave = before;
+
+	if (!new_slave)
+		goto check_state;
+
+	bond_set_slave_link_state(new_slave, BOND_LINK_BACK,
+				  BOND_SLAVE_NOTIFY_LATER);
+	bond_set_slave_active_flags(new_slave, BOND_SLAVE_NOTIFY_LATER);
+	bond_arp_send_all(bond, new_slave);
+	new_slave->last_link_up = jiffies;
+	rcu_assign_pointer(bond->current_arp_slave, new_slave);
+
+check_state:
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		if (slave->should_notify || slave->should_notify_link) {
+			should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
+			break;
+		}
+	}
+	return should_notify_rtnl;
+}
+
+static void bond_activebackup_arp_mon(struct bonding *bond)
+{
+	bool should_notify_peers = false;
+	bool should_notify_rtnl = false;
+	int delta_in_ticks;
+
+	delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
+
+	if (!bond_has_slaves(bond))
+		goto re_arm;
+
+	rcu_read_lock();
+
+	should_notify_peers = bond_should_notify_peers(bond);
+
+	if (bond_ab_arp_inspect(bond)) {
+		rcu_read_unlock();
+
+		/* Race avoidance with bond_close flush of workqueue */
+		if (!rtnl_trylock()) {
+			delta_in_ticks = 1;
+			should_notify_peers = false;
+			goto re_arm;
+		}
+
+		bond_ab_arp_commit(bond);
+
+		rtnl_unlock();
+		rcu_read_lock();
+	}
+
+	should_notify_rtnl = bond_ab_arp_probe(bond);
+	rcu_read_unlock();
+
+re_arm:
+	if (bond->params.arp_interval)
+		queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
+
+	if (should_notify_peers || should_notify_rtnl) {
+		if (!rtnl_trylock())
+			return;
+
+		if (should_notify_peers)
+			call_netdevice_notifiers(NETDEV_NOTIFY_PEERS,
+						 bond->dev);
+		if (should_notify_rtnl) {
+			bond_slave_state_notify(bond);
+			bond_slave_link_notify(bond);
+		}
+
+		rtnl_unlock();
+	}
+}
+
+static void bond_arp_monitor(struct work_struct *work)
+{
+	struct bonding *bond = container_of(work, struct bonding,
+					    arp_work.work);
+
+	if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
+		bond_activebackup_arp_mon(bond);
+	else
+		bond_loadbalance_arp_mon(bond);
+}
+
+/*-------------------------- netdev event handling --------------------------*/
+
+/* Change device name */
+static int bond_event_changename(struct bonding *bond)
+{
+	bond_remove_proc_entry(bond);
+	bond_create_proc_entry(bond);
+
+	bond_debug_reregister(bond);
+
+	return NOTIFY_DONE;
+}
+
+static int bond_master_netdev_event(unsigned long event,
+				    struct net_device *bond_dev)
+{
+	struct bonding *event_bond = netdev_priv(bond_dev);
+
+	switch (event) {
+	case NETDEV_CHANGENAME:
+		return bond_event_changename(event_bond);
+	case NETDEV_UNREGISTER:
+		bond_remove_proc_entry(event_bond);
+		break;
+	case NETDEV_REGISTER:
+		bond_create_proc_entry(event_bond);
+		break;
+	case NETDEV_NOTIFY_PEERS:
+		if (event_bond->send_peer_notif)
+			event_bond->send_peer_notif--;
+		break;
+	default:
+		break;
+	}
+
+	return NOTIFY_DONE;
+}
+
+static int bond_slave_netdev_event(unsigned long event,
+				   struct net_device *slave_dev)
+{
+	struct slave *slave = bond_slave_get_rtnl(slave_dev), *primary;
+	struct bonding *bond;
+	struct net_device *bond_dev;
+
+	/* A netdev event can be generated while enslaving a device
+	 * before netdev_rx_handler_register is called in which case
+	 * slave will be NULL
+	 */
+	if (!slave)
+		return NOTIFY_DONE;
+	bond_dev = slave->bond->dev;
+	bond = slave->bond;
+	primary = rtnl_dereference(bond->primary_slave);
+
+	switch (event) {
+	case NETDEV_UNREGISTER:
+		if (bond_dev->type != ARPHRD_ETHER)
+			bond_release_and_destroy(bond_dev, slave_dev);
+		else
+			__bond_release_one(bond_dev, slave_dev, false, true);
+		break;
+	case NETDEV_UP:
+	case NETDEV_CHANGE:
+		/* For 802.3ad mode only:
+		 * Getting invalid Speed/Duplex values here will put slave
+		 * in weird state. Mark it as link-fail if the link was
+		 * previously up or link-down if it hasn't yet come up, and
+		 * let link-monitoring (miimon) set it right when correct
+		 * speeds/duplex are available.
+		 */
+		if (bond_update_speed_duplex(slave) &&
+		    BOND_MODE(bond) == BOND_MODE_8023AD) {
+			if (slave->last_link_up)
+				slave->link = BOND_LINK_FAIL;
+			else
+				slave->link = BOND_LINK_DOWN;
+		}
+
+		if (BOND_MODE(bond) == BOND_MODE_8023AD)
+			bond_3ad_adapter_speed_duplex_changed(slave);
+		/* Fallthrough */
+	case NETDEV_DOWN:
+		/* Refresh slave-array if applicable!
+		 * If the setup does not use miimon or arpmon (mode-specific!),
+		 * then these events will not cause the slave-array to be
+		 * refreshed. This will cause xmit to use a slave that is not
+		 * usable. Avoid such situation by refeshing the array at these
+		 * events. If these (miimon/arpmon) parameters are configured
+		 * then array gets refreshed twice and that should be fine!
+		 */
+		if (bond_mode_can_use_xmit_hash(bond))
+			bond_update_slave_arr(bond, NULL);
+		break;
+	case NETDEV_CHANGEMTU:
+		/* TODO: Should slaves be allowed to
+		 * independently alter their MTU?  For
+		 * an active-backup bond, slaves need
+		 * not be the same type of device, so
+		 * MTUs may vary.  For other modes,
+		 * slaves arguably should have the
+		 * same MTUs. To do this, we'd need to
+		 * take over the slave's change_mtu
+		 * function for the duration of their
+		 * servitude.
+		 */
+		break;
+	case NETDEV_CHANGENAME:
+		/* we don't care if we don't have primary set */
+		if (!bond_uses_primary(bond) ||
+		    !bond->params.primary[0])
+			break;
+
+		if (slave == primary) {
+			/* slave's name changed - he's no longer primary */
+			RCU_INIT_POINTER(bond->primary_slave, NULL);
+		} else if (!strcmp(slave_dev->name, bond->params.primary)) {
+			/* we have a new primary slave */
+			rcu_assign_pointer(bond->primary_slave, slave);
+		} else { /* we didn't change primary - exit */
+			break;
+		}
+
+		netdev_info(bond->dev, "Primary slave changed to %s, reselecting active slave\n",
+			    primary ? slave_dev->name : "none");
+
+		block_netpoll_tx();
+		bond_select_active_slave(bond);
+		unblock_netpoll_tx();
+		break;
+	case NETDEV_FEAT_CHANGE:
+		bond_compute_features(bond);
+		break;
+	case NETDEV_RESEND_IGMP:
+		/* Propagate to master device */
+		call_netdevice_notifiers(event, slave->bond->dev);
+		break;
+	default:
+		break;
+	}
+
+	return NOTIFY_DONE;
+}
+
+/* bond_netdev_event: handle netdev notifier chain events.
+ *
+ * This function receives events for the netdev chain.  The caller (an
+ * ioctl handler calling blocking_notifier_call_chain) holds the necessary
+ * locks for us to safely manipulate the slave devices (RTNL lock,
+ * dev_probe_lock).
+ */
+static int bond_netdev_event(struct notifier_block *this,
+			     unsigned long event, void *ptr)
+{
+	struct net_device *event_dev = netdev_notifier_info_to_dev(ptr);
+
+	netdev_dbg(event_dev, "event: %lx\n", event);
+
+	if (!(event_dev->priv_flags & IFF_BONDING))
+		return NOTIFY_DONE;
+
+	if (event_dev->flags & IFF_MASTER) {
+		int ret;
+
+		netdev_dbg(event_dev, "IFF_MASTER\n");
+		ret = bond_master_netdev_event(event, event_dev);
+		if (ret != NOTIFY_DONE)
+			return ret;
+	}
+
+	if (event_dev->flags & IFF_SLAVE) {
+		netdev_dbg(event_dev, "IFF_SLAVE\n");
+		return bond_slave_netdev_event(event, event_dev);
+	}
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block bond_netdev_notifier = {
+	.notifier_call = bond_netdev_event,
+};
+
+/*---------------------------- Hashing Policies -----------------------------*/
+
+/* L2 hash helper */
+static inline u32 bond_eth_hash(struct sk_buff *skb)
+{
+	struct ethhdr *ep, hdr_tmp;
+
+	ep = skb_header_pointer(skb, 0, sizeof(hdr_tmp), &hdr_tmp);
+	if (ep)
+		return ep->h_dest[5] ^ ep->h_source[5] ^ ep->h_proto;
+	return 0;
+}
+
+/* Extract the appropriate headers based on bond's xmit policy */
+static bool bond_flow_dissect(struct bonding *bond, struct sk_buff *skb,
+			      struct flow_keys *fk)
+{
+	const struct ipv6hdr *iph6;
+	const struct iphdr *iph;
+	int noff, proto = -1;
+
+	if (bond->params.xmit_policy > BOND_XMIT_POLICY_LAYER23)
+		return skb_flow_dissect_flow_keys(skb, fk, 0);
+
+	fk->ports.ports = 0;
+	noff = skb_network_offset(skb);
+	if (skb->protocol == htons(ETH_P_IP)) {
+		if (unlikely(!pskb_may_pull(skb, noff + sizeof(*iph))))
+			return false;
+		iph = ip_hdr(skb);
+		iph_to_flow_copy_v4addrs(fk, iph);
+		noff += iph->ihl << 2;
+		if (!ip_is_fragment(iph))
+			proto = iph->protocol;
+	} else if (skb->protocol == htons(ETH_P_IPV6)) {
+		if (unlikely(!pskb_may_pull(skb, noff + sizeof(*iph6))))
+			return false;
+		iph6 = ipv6_hdr(skb);
+		iph_to_flow_copy_v6addrs(fk, iph6);
+		noff += sizeof(*iph6);
+		proto = iph6->nexthdr;
+	} else {
+		return false;
+	}
+	if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34 && proto >= 0)
+		fk->ports.ports = skb_flow_get_ports(skb, noff, proto);
+
+	return true;
+}
+
+/**
+ * bond_xmit_hash - generate a hash value based on the xmit policy
+ * @bond: bonding device
+ * @skb: buffer to use for headers
+ *
+ * This function will extract the necessary headers from the skb buffer and use
+ * them to generate a hash based on the xmit_policy set in the bonding device
+ */
+u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb)
+{
+	struct flow_keys flow;
+	u32 hash;
+
+	if (bond->params.xmit_policy == BOND_XMIT_POLICY_ENCAP34 &&
+	    skb->l4_hash)
+		return skb->hash;
+
+	if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER2 ||
+	    !bond_flow_dissect(bond, skb, &flow))
+		return bond_eth_hash(skb);
+
+	if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER23 ||
+	    bond->params.xmit_policy == BOND_XMIT_POLICY_ENCAP23)
+		hash = bond_eth_hash(skb);
+	else
+		hash = (__force u32)flow.ports.ports;
+	hash ^= (__force u32)flow_get_u32_dst(&flow) ^
+		(__force u32)flow_get_u32_src(&flow);
+	hash ^= (hash >> 16);
+	hash ^= (hash >> 8);
+
+	return hash >> 1;
+}
+
+/*-------------------------- Device entry points ----------------------------*/
+
+void bond_work_init_all(struct bonding *bond)
+{
+	INIT_DELAYED_WORK(&bond->mcast_work,
+			  bond_resend_igmp_join_requests_delayed);
+	INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
+	INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
+	INIT_DELAYED_WORK(&bond->arp_work, bond_arp_monitor);
+	INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
+	INIT_DELAYED_WORK(&bond->slave_arr_work, bond_slave_arr_handler);
+}
+
+static void bond_work_cancel_all(struct bonding *bond)
+{
+	cancel_delayed_work_sync(&bond->mii_work);
+	cancel_delayed_work_sync(&bond->arp_work);
+	cancel_delayed_work_sync(&bond->alb_work);
+	cancel_delayed_work_sync(&bond->ad_work);
+	cancel_delayed_work_sync(&bond->mcast_work);
+	cancel_delayed_work_sync(&bond->slave_arr_work);
+}
+
+static int bond_open(struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct list_head *iter;
+	struct slave *slave;
+
+	/* reset slave->backup and slave->inactive */
+	if (bond_has_slaves(bond)) {
+		bond_for_each_slave(bond, slave, iter) {
+			if (bond_uses_primary(bond) &&
+			    slave != rcu_access_pointer(bond->curr_active_slave)) {
+				bond_set_slave_inactive_flags(slave,
+							      BOND_SLAVE_NOTIFY_NOW);
+			} else if (BOND_MODE(bond) != BOND_MODE_8023AD) {
+				bond_set_slave_active_flags(slave,
+							    BOND_SLAVE_NOTIFY_NOW);
+			}
+		}
+	}
+
+	if (bond_is_lb(bond)) {
+		/* bond_alb_initialize must be called before the timer
+		 * is started.
+		 */
+		if (bond_alb_initialize(bond, (BOND_MODE(bond) == BOND_MODE_ALB)))
+			return -ENOMEM;
+		if (bond->params.tlb_dynamic_lb || BOND_MODE(bond) == BOND_MODE_ALB)
+			queue_delayed_work(bond->wq, &bond->alb_work, 0);
+	}
+
+	if (bond->params.miimon)  /* link check interval, in milliseconds. */
+		queue_delayed_work(bond->wq, &bond->mii_work, 0);
+
+	if (bond->params.arp_interval) {  /* arp interval, in milliseconds. */
+		queue_delayed_work(bond->wq, &bond->arp_work, 0);
+		bond->recv_probe = bond_arp_rcv;
+	}
+
+	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+		queue_delayed_work(bond->wq, &bond->ad_work, 0);
+		/* register to receive LACPDUs */
+		bond->recv_probe = bond_3ad_lacpdu_recv;
+		bond_3ad_initiate_agg_selection(bond, 1);
+	}
+
+	if (bond_mode_can_use_xmit_hash(bond))
+		bond_update_slave_arr(bond, NULL);
+
+	return 0;
+}
+
+static int bond_close(struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+
+	bond_work_cancel_all(bond);
+	bond->send_peer_notif = 0;
+	if (bond_is_lb(bond))
+		bond_alb_deinitialize(bond);
+	bond->recv_probe = NULL;
+
+	return 0;
+}
+
+/* fold stats, assuming all rtnl_link_stats64 fields are u64, but
+ * that some drivers can provide 32bit values only.
+ */
+static void bond_fold_stats(struct rtnl_link_stats64 *_res,
+			    const struct rtnl_link_stats64 *_new,
+			    const struct rtnl_link_stats64 *_old)
+{
+	const u64 *new = (const u64 *)_new;
+	const u64 *old = (const u64 *)_old;
+	u64 *res = (u64 *)_res;
+	int i;
+
+	for (i = 0; i < sizeof(*_res) / sizeof(u64); i++) {
+		u64 nv = new[i];
+		u64 ov = old[i];
+		s64 delta = nv - ov;
+
+		/* detects if this particular field is 32bit only */
+		if (((nv | ov) >> 32) == 0)
+			delta = (s64)(s32)((u32)nv - (u32)ov);
+
+		/* filter anomalies, some drivers reset their stats
+		 * at down/up events.
+		 */
+		if (delta > 0)
+			res[i] += delta;
+	}
+}
+
+static int bond_get_nest_level(struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+
+	return bond->nest_level;
+}
+
+static void bond_get_stats(struct net_device *bond_dev,
+			   struct rtnl_link_stats64 *stats)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct rtnl_link_stats64 temp;
+	struct list_head *iter;
+	struct slave *slave;
+
+	spin_lock_nested(&bond->stats_lock, bond_get_nest_level(bond_dev));
+	memcpy(stats, &bond->bond_stats, sizeof(*stats));
+
+	rcu_read_lock();
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		const struct rtnl_link_stats64 *new =
+			dev_get_stats(slave->dev, &temp);
+
+		bond_fold_stats(stats, new, &slave->slave_stats);
+
+		/* save off the slave stats for the next run */
+		memcpy(&slave->slave_stats, new, sizeof(*new));
+	}
+	rcu_read_unlock();
+
+	memcpy(&bond->bond_stats, stats, sizeof(*stats));
+	spin_unlock(&bond->stats_lock);
+}
+
+static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct net_device *slave_dev = NULL;
+	struct ifbond k_binfo;
+	struct ifbond __user *u_binfo = NULL;
+	struct ifslave k_sinfo;
+	struct ifslave __user *u_sinfo = NULL;
+	struct mii_ioctl_data *mii = NULL;
+	struct bond_opt_value newval;
+	struct net *net;
+	int res = 0;
+
+	netdev_dbg(bond_dev, "bond_ioctl: cmd=%d\n", cmd);
+
+	switch (cmd) {
+	case SIOCGMIIPHY:
+		mii = if_mii(ifr);
+		if (!mii)
+			return -EINVAL;
+
+		mii->phy_id = 0;
+		/* Fall Through */
+	case SIOCGMIIREG:
+		/* We do this again just in case we were called by SIOCGMIIREG
+		 * instead of SIOCGMIIPHY.
+		 */
+		mii = if_mii(ifr);
+		if (!mii)
+			return -EINVAL;
+
+		if (mii->reg_num == 1) {
+			mii->val_out = 0;
+			if (netif_carrier_ok(bond->dev))
+				mii->val_out = BMSR_LSTATUS;
+		}
+
+		return 0;
+	case BOND_INFO_QUERY_OLD:
+	case SIOCBONDINFOQUERY:
+		u_binfo = (struct ifbond __user *)ifr->ifr_data;
+
+		if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond)))
+			return -EFAULT;
+
+		bond_info_query(bond_dev, &k_binfo);
+		if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond)))
+			return -EFAULT;
+
+		return 0;
+	case BOND_SLAVE_INFO_QUERY_OLD:
+	case SIOCBONDSLAVEINFOQUERY:
+		u_sinfo = (struct ifslave __user *)ifr->ifr_data;
+
+		if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave)))
+			return -EFAULT;
+
+		res = bond_slave_info_query(bond_dev, &k_sinfo);
+		if (res == 0 &&
+		    copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave)))
+			return -EFAULT;
+
+		return res;
+	default:
+		break;
+	}
+
+	net = dev_net(bond_dev);
+
+	if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
+		return -EPERM;
+
+	slave_dev = __dev_get_by_name(net, ifr->ifr_slave);
+
+	netdev_dbg(bond_dev, "slave_dev=%p:\n", slave_dev);
+
+	if (!slave_dev)
+		return -ENODEV;
+
+	netdev_dbg(bond_dev, "slave_dev->name=%s:\n", slave_dev->name);
+	switch (cmd) {
+	case BOND_ENSLAVE_OLD:
+	case SIOCBONDENSLAVE:
+		res = bond_enslave(bond_dev, slave_dev, NULL);
+		break;
+	case BOND_RELEASE_OLD:
+	case SIOCBONDRELEASE:
+		res = bond_release(bond_dev, slave_dev);
+		break;
+	case BOND_SETHWADDR_OLD:
+	case SIOCBONDSETHWADDR:
+		bond_set_dev_addr(bond_dev, slave_dev);
+		res = 0;
+		break;
+	case BOND_CHANGE_ACTIVE_OLD:
+	case SIOCBONDCHANGEACTIVE:
+		bond_opt_initstr(&newval, slave_dev->name);
+		res = __bond_opt_set_notify(bond, BOND_OPT_ACTIVE_SLAVE,
+					    &newval);
+		break;
+	default:
+		res = -EOPNOTSUPP;
+	}
+
+	return res;
+}
+
+static void bond_change_rx_flags(struct net_device *bond_dev, int change)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+
+	if (change & IFF_PROMISC)
+		bond_set_promiscuity(bond,
+				     bond_dev->flags & IFF_PROMISC ? 1 : -1);
+
+	if (change & IFF_ALLMULTI)
+		bond_set_allmulti(bond,
+				  bond_dev->flags & IFF_ALLMULTI ? 1 : -1);
+}
+
+static void bond_set_rx_mode(struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct list_head *iter;
+	struct slave *slave;
+
+	rcu_read_lock();
+	if (bond_uses_primary(bond)) {
+		slave = rcu_dereference(bond->curr_active_slave);
+		if (slave) {
+			dev_uc_sync(slave->dev, bond_dev);
+			dev_mc_sync(slave->dev, bond_dev);
+		}
+	} else {
+		bond_for_each_slave_rcu(bond, slave, iter) {
+			dev_uc_sync_multiple(slave->dev, bond_dev);
+			dev_mc_sync_multiple(slave->dev, bond_dev);
+		}
+	}
+	rcu_read_unlock();
+}
+
+static int bond_neigh_init(struct neighbour *n)
+{
+	struct bonding *bond = netdev_priv(n->dev);
+	const struct net_device_ops *slave_ops;
+	struct neigh_parms parms;
+	struct slave *slave;
+	int ret;
+
+	slave = bond_first_slave(bond);
+	if (!slave)
+		return 0;
+	slave_ops = slave->dev->netdev_ops;
+	if (!slave_ops->ndo_neigh_setup)
+		return 0;
+
+	parms.neigh_setup = NULL;
+	parms.neigh_cleanup = NULL;
+	ret = slave_ops->ndo_neigh_setup(slave->dev, &parms);
+	if (ret)
+		return ret;
+
+	/* Assign slave's neigh_cleanup to neighbour in case cleanup is called
+	 * after the last slave has been detached.  Assumes that all slaves
+	 * utilize the same neigh_cleanup (true at this writing as only user
+	 * is ipoib).
+	 */
+	n->parms->neigh_cleanup = parms.neigh_cleanup;
+
+	if (!parms.neigh_setup)
+		return 0;
+
+	return parms.neigh_setup(n);
+}
+
+/* The bonding ndo_neigh_setup is called at init time beofre any
+ * slave exists. So we must declare proxy setup function which will
+ * be used at run time to resolve the actual slave neigh param setup.
+ *
+ * It's also called by master devices (such as vlans) to setup their
+ * underlying devices. In that case - do nothing, we're already set up from
+ * our init.
+ */
+static int bond_neigh_setup(struct net_device *dev,
+			    struct neigh_parms *parms)
+{
+	/* modify only our neigh_parms */
+	if (parms->dev == dev)
+		parms->neigh_setup = bond_neigh_init;
+
+	return 0;
+}
+
+/* Change the MTU of all of a master's slaves to match the master */
+static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct slave *slave, *rollback_slave;
+	struct list_head *iter;
+	int res = 0;
+
+	netdev_dbg(bond_dev, "bond=%p, new_mtu=%d\n", bond, new_mtu);
+
+	bond_for_each_slave(bond, slave, iter) {
+		netdev_dbg(bond_dev, "s %p c_m %p\n",
+			   slave, slave->dev->netdev_ops->ndo_change_mtu);
+
+		res = dev_set_mtu(slave->dev, new_mtu);
+
+		if (res) {
+			/* If we failed to set the slave's mtu to the new value
+			 * we must abort the operation even in ACTIVE_BACKUP
+			 * mode, because if we allow the backup slaves to have
+			 * different mtu values than the active slave we'll
+			 * need to change their mtu when doing a failover. That
+			 * means changing their mtu from timer context, which
+			 * is probably not a good idea.
+			 */
+			netdev_dbg(bond_dev, "err %d %s\n", res,
+				   slave->dev->name);
+			goto unwind;
+		}
+	}
+
+	bond_dev->mtu = new_mtu;
+
+	return 0;
+
+unwind:
+	/* unwind from head to the slave that failed */
+	bond_for_each_slave(bond, rollback_slave, iter) {
+		int tmp_res;
+
+		if (rollback_slave == slave)
+			break;
+
+		tmp_res = dev_set_mtu(rollback_slave->dev, bond_dev->mtu);
+		if (tmp_res) {
+			netdev_dbg(bond_dev, "unwind err %d dev %s\n",
+				   tmp_res, rollback_slave->dev->name);
+		}
+	}
+
+	return res;
+}
+
+/* Change HW address
+ *
+ * Note that many devices must be down to change the HW address, and
+ * downing the master releases all slaves.  We can make bonds full of
+ * bonding devices to test this, however.
+ */
+static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct slave *slave, *rollback_slave;
+	struct sockaddr_storage *ss = addr, tmp_ss;
+	struct list_head *iter;
+	int res = 0;
+
+	if (BOND_MODE(bond) == BOND_MODE_ALB)
+		return bond_alb_set_mac_address(bond_dev, addr);
+
+
+	netdev_dbg(bond_dev, "bond=%p\n", bond);
+
+	/* If fail_over_mac is enabled, do nothing and return success.
+	 * Returning an error causes ifenslave to fail.
+	 */
+	if (bond->params.fail_over_mac &&
+	    BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
+		return 0;
+
+	if (!is_valid_ether_addr(ss->__data))
+		return -EADDRNOTAVAIL;
+
+	bond_for_each_slave(bond, slave, iter) {
+		netdev_dbg(bond_dev, "slave %p %s\n", slave, slave->dev->name);
+		res = dev_set_mac_address(slave->dev, addr);
+		if (res) {
+			/* TODO: consider downing the slave
+			 * and retry ?
+			 * User should expect communications
+			 * breakage anyway until ARP finish
+			 * updating, so...
+			 */
+			netdev_dbg(bond_dev, "err %d %s\n", res, slave->dev->name);
+			goto unwind;
+		}
+	}
+
+	/* success */
+	memcpy(bond_dev->dev_addr, ss->__data, bond_dev->addr_len);
+	return 0;
+
+unwind:
+	memcpy(tmp_ss.__data, bond_dev->dev_addr, bond_dev->addr_len);
+	tmp_ss.ss_family = bond_dev->type;
+
+	/* unwind from head to the slave that failed */
+	bond_for_each_slave(bond, rollback_slave, iter) {
+		int tmp_res;
+
+		if (rollback_slave == slave)
+			break;
+
+		tmp_res = dev_set_mac_address(rollback_slave->dev,
+					      (struct sockaddr *)&tmp_ss);
+		if (tmp_res) {
+			netdev_dbg(bond_dev, "unwind err %d dev %s\n",
+				   tmp_res, rollback_slave->dev->name);
+		}
+	}
+
+	return res;
+}
+
+/**
+ * bond_xmit_slave_id - transmit skb through slave with slave_id
+ * @bond: bonding device that is transmitting
+ * @skb: buffer to transmit
+ * @slave_id: slave id up to slave_cnt-1 through which to transmit
+ *
+ * This function tries to transmit through slave with slave_id but in case
+ * it fails, it tries to find the first available slave for transmission.
+ * The skb is consumed in all cases, thus the function is void.
+ */
+static void bond_xmit_slave_id(struct bonding *bond, struct sk_buff *skb, int slave_id)
+{
+	struct list_head *iter;
+	struct slave *slave;
+	int i = slave_id;
+
+	/* Here we start from the slave with slave_id */
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		if (--i < 0) {
+			if (bond_slave_can_tx(slave)) {
+				bond_dev_queue_xmit(bond, skb, slave->dev);
+				return;
+			}
+		}
+	}
+
+	/* Here we start from the first slave up to slave_id */
+	i = slave_id;
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		if (--i < 0)
+			break;
+		if (bond_slave_can_tx(slave)) {
+			bond_dev_queue_xmit(bond, skb, slave->dev);
+			return;
+		}
+	}
+	/* no slave that can tx has been found */
+	bond_tx_drop(bond->dev, skb);
+}
+
+/**
+ * bond_rr_gen_slave_id - generate slave id based on packets_per_slave
+ * @bond: bonding device to use
+ *
+ * Based on the value of the bonding device's packets_per_slave parameter
+ * this function generates a slave id, which is usually used as the next
+ * slave to transmit through.
+ */
+static u32 bond_rr_gen_slave_id(struct bonding *bond)
+{
+	u32 slave_id;
+	struct reciprocal_value reciprocal_packets_per_slave;
+	int packets_per_slave = bond->params.packets_per_slave;
+
+	switch (packets_per_slave) {
+	case 0:
+		slave_id = prandom_u32();
+		break;
+	case 1:
+		slave_id = bond->rr_tx_counter;
+		break;
+	default:
+		reciprocal_packets_per_slave =
+			bond->params.reciprocal_packets_per_slave;
+		slave_id = reciprocal_divide(bond->rr_tx_counter,
+					     reciprocal_packets_per_slave);
+		break;
+	}
+	bond->rr_tx_counter++;
+
+	return slave_id;
+}
+
+static netdev_tx_t bond_xmit_roundrobin(struct sk_buff *skb,
+					struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct slave *slave;
+	int slave_cnt;
+	u32 slave_id;
+
+	/* Start with the curr_active_slave that joined the bond as the
+	 * default for sending IGMP traffic.  For failover purposes one
+	 * needs to maintain some consistency for the interface that will
+	 * send the join/membership reports.  The curr_active_slave found
+	 * will send all of this type of traffic.
+	 */
+	if (skb->protocol == htons(ETH_P_IP)) {
+		int noff = skb_network_offset(skb);
+		struct iphdr *iph;
+
+		if (unlikely(!pskb_may_pull(skb, noff + sizeof(*iph))))
+			goto non_igmp;
+
+		iph = ip_hdr(skb);
+		if (iph->protocol == IPPROTO_IGMP) {
+			slave = rcu_dereference(bond->curr_active_slave);
+			if (slave)
+				bond_dev_queue_xmit(bond, skb, slave->dev);
+			else
+				bond_xmit_slave_id(bond, skb, 0);
+			return NETDEV_TX_OK;
+		}
+	}
+
+non_igmp:
+	slave_cnt = READ_ONCE(bond->slave_cnt);
+	if (likely(slave_cnt)) {
+		slave_id = bond_rr_gen_slave_id(bond);
+		bond_xmit_slave_id(bond, skb, slave_id % slave_cnt);
+	} else {
+		bond_tx_drop(bond_dev, skb);
+	}
+	return NETDEV_TX_OK;
+}
+
+/* In active-backup mode, we know that bond->curr_active_slave is always valid if
+ * the bond has a usable interface.
+ */
+static netdev_tx_t bond_xmit_activebackup(struct sk_buff *skb,
+					  struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct slave *slave;
+
+	slave = rcu_dereference(bond->curr_active_slave);
+	if (slave)
+		bond_dev_queue_xmit(bond, skb, slave->dev);
+	else
+		bond_tx_drop(bond_dev, skb);
+
+	return NETDEV_TX_OK;
+}
+
+/* Use this to update slave_array when (a) it's not appropriate to update
+ * slave_array right away (note that update_slave_array() may sleep)
+ * and / or (b) RTNL is not held.
+ */
+void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay)
+{
+	queue_delayed_work(bond->wq, &bond->slave_arr_work, delay);
+}
+
+/* Slave array work handler. Holds only RTNL */
+static void bond_slave_arr_handler(struct work_struct *work)
+{
+	struct bonding *bond = container_of(work, struct bonding,
+					    slave_arr_work.work);
+	int ret;
+
+	if (!rtnl_trylock())
+		goto err;
+
+	ret = bond_update_slave_arr(bond, NULL);
+	rtnl_unlock();
+	if (ret) {
+		pr_warn_ratelimited("Failed to update slave array from WT\n");
+		goto err;
+	}
+	return;
+
+err:
+	bond_slave_arr_work_rearm(bond, 1);
+}
+
+/* Build the usable slaves array in control path for modes that use xmit-hash
+ * to determine the slave interface -
+ * (a) BOND_MODE_8023AD
+ * (b) BOND_MODE_XOR
+ * (c) (BOND_MODE_TLB || BOND_MODE_ALB) && tlb_dynamic_lb == 0
+ *
+ * The caller is expected to hold RTNL only and NO other lock!
+ */
+int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)
+{
+	struct slave *slave;
+	struct list_head *iter;
+	struct bond_up_slave *new_arr, *old_arr;
+	int agg_id = 0;
+	int ret = 0;
+
+#ifdef CONFIG_LOCKDEP
+	WARN_ON(lockdep_is_held(&bond->mode_lock));
+#endif
+
+	new_arr = kzalloc(offsetof(struct bond_up_slave, arr[bond->slave_cnt]),
+			  GFP_KERNEL);
+	if (!new_arr) {
+		ret = -ENOMEM;
+		pr_err("Failed to build slave-array.\n");
+		goto out;
+	}
+	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+		struct ad_info ad_info;
+
+		if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
+			pr_debug("bond_3ad_get_active_agg_info failed\n");
+			kfree_rcu(new_arr, rcu);
+			/* No active aggragator means it's not safe to use
+			 * the previous array.
+			 */
+			old_arr = rtnl_dereference(bond->slave_arr);
+			if (old_arr) {
+				RCU_INIT_POINTER(bond->slave_arr, NULL);
+				kfree_rcu(old_arr, rcu);
+			}
+			goto out;
+		}
+		agg_id = ad_info.aggregator_id;
+	}
+	bond_for_each_slave(bond, slave, iter) {
+		if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+			struct aggregator *agg;
+
+			agg = SLAVE_AD_INFO(slave)->port.aggregator;
+			if (!agg || agg->aggregator_identifier != agg_id)
+				continue;
+		}
+		if (!bond_slave_can_tx(slave))
+			continue;
+		if (skipslave == slave)
+			continue;
+
+		netdev_dbg(bond->dev,
+			   "Adding slave dev %s to tx hash array[%d]\n",
+			   slave->dev->name, new_arr->count);
+
+		new_arr->arr[new_arr->count++] = slave;
+	}
+
+	old_arr = rtnl_dereference(bond->slave_arr);
+	rcu_assign_pointer(bond->slave_arr, new_arr);
+	if (old_arr)
+		kfree_rcu(old_arr, rcu);
+out:
+	if (ret != 0 && skipslave) {
+		int idx;
+
+		/* Rare situation where caller has asked to skip a specific
+		 * slave but allocation failed (most likely!). BTW this is
+		 * only possible when the call is initiated from
+		 * __bond_release_one(). In this situation; overwrite the
+		 * skipslave entry in the array with the last entry from the
+		 * array to avoid a situation where the xmit path may choose
+		 * this to-be-skipped slave to send a packet out.
+		 */
+		old_arr = rtnl_dereference(bond->slave_arr);
+		for (idx = 0; old_arr != NULL && idx < old_arr->count; idx++) {
+			if (skipslave == old_arr->arr[idx]) {
+				old_arr->arr[idx] =
+				    old_arr->arr[old_arr->count-1];
+				old_arr->count--;
+				break;
+			}
+		}
+	}
+	return ret;
+}
+
+/* Use this Xmit function for 3AD as well as XOR modes. The current
+ * usable slave array is formed in the control path. The xmit function
+ * just calculates hash and sends the packet out.
+ */
+static netdev_tx_t bond_3ad_xor_xmit(struct sk_buff *skb,
+				     struct net_device *dev)
+{
+	struct bonding *bond = netdev_priv(dev);
+	struct slave *slave;
+	struct bond_up_slave *slaves;
+	unsigned int count;
+
+	slaves = rcu_dereference(bond->slave_arr);
+	count = slaves ? READ_ONCE(slaves->count) : 0;
+	if (likely(count)) {
+		slave = slaves->arr[bond_xmit_hash(bond, skb) % count];
+		bond_dev_queue_xmit(bond, skb, slave->dev);
+	} else {
+		bond_tx_drop(dev, skb);
+	}
+
+	return NETDEV_TX_OK;
+}
+
+/* in broadcast mode, we send everything to all usable interfaces. */
+static netdev_tx_t bond_xmit_broadcast(struct sk_buff *skb,
+				       struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct slave *slave = NULL;
+	struct list_head *iter;
+
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		if (bond_is_last_slave(bond, slave))
+			break;
+		if (bond_slave_is_up(slave) && slave->link == BOND_LINK_UP) {
+			struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
+
+			if (!skb2) {
+				net_err_ratelimited("%s: Error: %s: skb_clone() failed\n",
+						    bond_dev->name, __func__);
+				continue;
+			}
+			bond_dev_queue_xmit(bond, skb2, slave->dev);
+		}
+	}
+	if (slave && bond_slave_is_up(slave) && slave->link == BOND_LINK_UP)
+		bond_dev_queue_xmit(bond, skb, slave->dev);
+	else
+		bond_tx_drop(bond_dev, skb);
+
+	return NETDEV_TX_OK;
+}
+
+/*------------------------- Device initialization ---------------------------*/
+
+/* Lookup the slave that corresponds to a qid */
+static inline int bond_slave_override(struct bonding *bond,
+				      struct sk_buff *skb)
+{
+	struct slave *slave = NULL;
+	struct list_head *iter;
+
+	if (!skb_rx_queue_recorded(skb))
+		return 1;
+
+	/* Find out if any slaves have the same mapping as this skb. */
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		if (slave->queue_id == skb_get_queue_mapping(skb)) {
+			if (bond_slave_is_up(slave) &&
+			    slave->link == BOND_LINK_UP) {
+				bond_dev_queue_xmit(bond, skb, slave->dev);
+				return 0;
+			}
+			/* If the slave isn't UP, use default transmit policy. */
+			break;
+		}
+	}
+
+	return 1;
+}
+
+
+static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb,
+			     struct net_device *sb_dev,
+			     select_queue_fallback_t fallback)
+{
+	/* This helper function exists to help dev_pick_tx get the correct
+	 * destination queue.  Using a helper function skips a call to
+	 * skb_tx_hash and will put the skbs in the queue we expect on their
+	 * way down to the bonding driver.
+	 */
+	u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
+
+	/* Save the original txq to restore before passing to the driver */
+	qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb_get_queue_mapping(skb);
+
+	if (unlikely(txq >= dev->real_num_tx_queues)) {
+		do {
+			txq -= dev->real_num_tx_queues;
+		} while (txq >= dev->real_num_tx_queues);
+	}
+	return txq;
+}
+
+static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct bonding *bond = netdev_priv(dev);
+
+	if (bond_should_override_tx_queue(bond) &&
+	    !bond_slave_override(bond, skb))
+		return NETDEV_TX_OK;
+
+	switch (BOND_MODE(bond)) {
+	case BOND_MODE_ROUNDROBIN:
+		return bond_xmit_roundrobin(skb, dev);
+	case BOND_MODE_ACTIVEBACKUP:
+		return bond_xmit_activebackup(skb, dev);
+	case BOND_MODE_8023AD:
+	case BOND_MODE_XOR:
+		return bond_3ad_xor_xmit(skb, dev);
+	case BOND_MODE_BROADCAST:
+		return bond_xmit_broadcast(skb, dev);
+	case BOND_MODE_ALB:
+		return bond_alb_xmit(skb, dev);
+	case BOND_MODE_TLB:
+		return bond_tlb_xmit(skb, dev);
+	default:
+		/* Should never happen, mode already checked */
+		netdev_err(dev, "Unknown bonding mode %d\n", BOND_MODE(bond));
+		WARN_ON_ONCE(1);
+		bond_tx_drop(dev, skb);
+		return NETDEV_TX_OK;
+	}
+}
+
+static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct bonding *bond = netdev_priv(dev);
+	netdev_tx_t ret = NETDEV_TX_OK;
+
+	/* If we risk deadlock from transmitting this in the
+	 * netpoll path, tell netpoll to queue the frame for later tx
+	 */
+	if (unlikely(is_netpoll_tx_blocked(dev)))
+		return NETDEV_TX_BUSY;
+
+	rcu_read_lock();
+	if (bond_has_slaves(bond))
+		ret = __bond_start_xmit(skb, dev);
+	else
+		bond_tx_drop(dev, skb);
+	rcu_read_unlock();
+
+	return ret;
+}
+
+static u32 bond_mode_bcast_speed(struct slave *slave, u32 speed)
+{
+	if (speed == 0 || speed == SPEED_UNKNOWN)
+		speed = slave->speed;
+	else
+		speed = min(speed, slave->speed);
+
+	return speed;
+}
+
+static int bond_ethtool_get_link_ksettings(struct net_device *bond_dev,
+					   struct ethtool_link_ksettings *cmd)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct list_head *iter;
+	struct slave *slave;
+	u32 speed = 0;
+
+	cmd->base.duplex = DUPLEX_UNKNOWN;
+	cmd->base.port = PORT_OTHER;
+
+	/* Since bond_slave_can_tx returns false for all inactive or down slaves, we
+	 * do not need to check mode.  Though link speed might not represent
+	 * the true receive or transmit bandwidth (not all modes are symmetric)
+	 * this is an accurate maximum.
+	 */
+	bond_for_each_slave(bond, slave, iter) {
+		if (bond_slave_can_tx(slave)) {
+			if (slave->speed != SPEED_UNKNOWN) {
+				if (BOND_MODE(bond) == BOND_MODE_BROADCAST)
+					speed = bond_mode_bcast_speed(slave,
+								      speed);
+				else
+					speed += slave->speed;
+			}
+			if (cmd->base.duplex == DUPLEX_UNKNOWN &&
+			    slave->duplex != DUPLEX_UNKNOWN)
+				cmd->base.duplex = slave->duplex;
+		}
+	}
+	cmd->base.speed = speed ? : SPEED_UNKNOWN;
+
+	return 0;
+}
+
+static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
+				     struct ethtool_drvinfo *drvinfo)
+{
+	strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
+	strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
+	snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), "%d",
+		 BOND_ABI_VERSION);
+}
+
+static const struct ethtool_ops bond_ethtool_ops = {
+	.get_drvinfo		= bond_ethtool_get_drvinfo,
+	.get_link		= ethtool_op_get_link,
+	.get_link_ksettings	= bond_ethtool_get_link_ksettings,
+};
+
+static const struct net_device_ops bond_netdev_ops = {
+	.ndo_init		= bond_init,
+	.ndo_uninit		= bond_uninit,
+	.ndo_open		= bond_open,
+	.ndo_stop		= bond_close,
+	.ndo_start_xmit		= bond_start_xmit,
+	.ndo_select_queue	= bond_select_queue,
+	.ndo_get_stats64	= bond_get_stats,
+	.ndo_do_ioctl		= bond_do_ioctl,
+	.ndo_change_rx_flags	= bond_change_rx_flags,
+	.ndo_set_rx_mode	= bond_set_rx_mode,
+	.ndo_change_mtu		= bond_change_mtu,
+	.ndo_set_mac_address	= bond_set_mac_address,
+	.ndo_neigh_setup	= bond_neigh_setup,
+	.ndo_vlan_rx_add_vid	= bond_vlan_rx_add_vid,
+	.ndo_vlan_rx_kill_vid	= bond_vlan_rx_kill_vid,
+	.ndo_get_lock_subclass  = bond_get_nest_level,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	.ndo_netpoll_setup	= bond_netpoll_setup,
+	.ndo_netpoll_cleanup	= bond_netpoll_cleanup,
+	.ndo_poll_controller	= bond_poll_controller,
+#endif
+	.ndo_add_slave		= bond_enslave,
+	.ndo_del_slave		= bond_release,
+	.ndo_fix_features	= bond_fix_features,
+	.ndo_features_check	= passthru_features_check,
+};
+
+static const struct device_type bond_type = {
+	.name = "bond",
+};
+
+static void bond_destructor(struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	if (bond->wq)
+		destroy_workqueue(bond->wq);
+}
+
+void bond_setup(struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+
+	spin_lock_init(&bond->mode_lock);
+	spin_lock_init(&bond->stats_lock);
+	bond->params = bonding_defaults;
+
+	/* Initialize pointers */
+	bond->dev = bond_dev;
+
+	/* Initialize the device entry points */
+	ether_setup(bond_dev);
+	bond_dev->max_mtu = ETH_MAX_MTU;
+	bond_dev->netdev_ops = &bond_netdev_ops;
+	bond_dev->ethtool_ops = &bond_ethtool_ops;
+
+	bond_dev->needs_free_netdev = true;
+	bond_dev->priv_destructor = bond_destructor;
+
+	SET_NETDEV_DEVTYPE(bond_dev, &bond_type);
+
+	/* Initialize the device options */
+	bond_dev->flags |= IFF_MASTER;
+	bond_dev->priv_flags |= IFF_BONDING | IFF_UNICAST_FLT | IFF_NO_QUEUE;
+	bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
+
+	/* don't acquire bond device's netif_tx_lock when transmitting */
+	bond_dev->features |= NETIF_F_LLTX;
+
+	/* By default, we declare the bond to be fully
+	 * VLAN hardware accelerated capable. Special
+	 * care is taken in the various xmit functions
+	 * when there are slaves that are not hw accel
+	 * capable
+	 */
+
+	/* Don't allow bond devices to change network namespaces. */
+	bond_dev->features |= NETIF_F_NETNS_LOCAL;
+
+	bond_dev->hw_features = BOND_VLAN_FEATURES |
+				NETIF_F_HW_VLAN_CTAG_RX |
+				NETIF_F_HW_VLAN_CTAG_FILTER;
+
+	bond_dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
+	bond_dev->features |= bond_dev->hw_features;
+	bond_dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
+}
+
+/* Destroy a bonding device.
+ * Must be under rtnl_lock when this function is called.
+ */
+static void bond_uninit(struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct list_head *iter;
+	struct slave *slave;
+	struct bond_up_slave *arr;
+
+	bond_netpoll_cleanup(bond_dev);
+
+	/* Release the bonded slaves */
+	bond_for_each_slave(bond, slave, iter)
+		__bond_release_one(bond_dev, slave->dev, true, true);
+	netdev_info(bond_dev, "Released all slaves\n");
+
+	arr = rtnl_dereference(bond->slave_arr);
+	if (arr) {
+		RCU_INIT_POINTER(bond->slave_arr, NULL);
+		kfree_rcu(arr, rcu);
+	}
+
+	list_del(&bond->bond_list);
+
+	bond_debug_unregister(bond);
+}
+
+/*------------------------- Module initialization ---------------------------*/
+
+static int bond_check_params(struct bond_params *params)
+{
+	int arp_validate_value, fail_over_mac_value, primary_reselect_value, i;
+	struct bond_opt_value newval;
+	const struct bond_opt_value *valptr;
+	int arp_all_targets_value = 0;
+	u16 ad_actor_sys_prio = 0;
+	u16 ad_user_port_key = 0;
+	__be32 arp_target[BOND_MAX_ARP_TARGETS] = { 0 };
+	int arp_ip_count;
+	int bond_mode	= BOND_MODE_ROUNDROBIN;
+	int xmit_hashtype = BOND_XMIT_POLICY_LAYER2;
+	int lacp_fast = 0;
+	int tlb_dynamic_lb;
+
+	/* Convert string parameters. */
+	if (mode) {
+		bond_opt_initstr(&newval, mode);
+		valptr = bond_opt_parse(bond_opt_get(BOND_OPT_MODE), &newval);
+		if (!valptr) {
+			pr_err("Error: Invalid bonding mode \"%s\"\n", mode);
+			return -EINVAL;
+		}
+		bond_mode = valptr->value;
+	}
+
+	if (xmit_hash_policy) {
+		if (bond_mode == BOND_MODE_ROUNDROBIN ||
+		    bond_mode == BOND_MODE_ACTIVEBACKUP ||
+		    bond_mode == BOND_MODE_BROADCAST) {
+			pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
+				bond_mode_name(bond_mode));
+		} else {
+			bond_opt_initstr(&newval, xmit_hash_policy);
+			valptr = bond_opt_parse(bond_opt_get(BOND_OPT_XMIT_HASH),
+						&newval);
+			if (!valptr) {
+				pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
+				       xmit_hash_policy);
+				return -EINVAL;
+			}
+			xmit_hashtype = valptr->value;
+		}
+	}
+
+	if (lacp_rate) {
+		if (bond_mode != BOND_MODE_8023AD) {
+			pr_info("lacp_rate param is irrelevant in mode %s\n",
+				bond_mode_name(bond_mode));
+		} else {
+			bond_opt_initstr(&newval, lacp_rate);
+			valptr = bond_opt_parse(bond_opt_get(BOND_OPT_LACP_RATE),
+						&newval);
+			if (!valptr) {
+				pr_err("Error: Invalid lacp rate \"%s\"\n",
+				       lacp_rate);
+				return -EINVAL;
+			}
+			lacp_fast = valptr->value;
+		}
+	}
+
+	if (ad_select) {
+		bond_opt_initstr(&newval, ad_select);
+		valptr = bond_opt_parse(bond_opt_get(BOND_OPT_AD_SELECT),
+					&newval);
+		if (!valptr) {
+			pr_err("Error: Invalid ad_select \"%s\"\n", ad_select);
+			return -EINVAL;
+		}
+		params->ad_select = valptr->value;
+		if (bond_mode != BOND_MODE_8023AD)
+			pr_warn("ad_select param only affects 802.3ad mode\n");
+	} else {
+		params->ad_select = BOND_AD_STABLE;
+	}
+
+	if (max_bonds < 0) {
+		pr_warn("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
+			max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
+		max_bonds = BOND_DEFAULT_MAX_BONDS;
+	}
+
+	if (miimon < 0) {
+		pr_warn("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to 0\n",
+			miimon, INT_MAX);
+		miimon = 0;
+	}
+
+	if (updelay < 0) {
+		pr_warn("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
+			updelay, INT_MAX);
+		updelay = 0;
+	}
+
+	if (downdelay < 0) {
+		pr_warn("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
+			downdelay, INT_MAX);
+		downdelay = 0;
+	}
+
+	if ((use_carrier != 0) && (use_carrier != 1)) {
+		pr_warn("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
+			use_carrier);
+		use_carrier = 1;
+	}
+
+	if (num_peer_notif < 0 || num_peer_notif > 255) {
+		pr_warn("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
+			num_peer_notif);
+		num_peer_notif = 1;
+	}
+
+	/* reset values for 802.3ad/TLB/ALB */
+	if (!bond_mode_uses_arp(bond_mode)) {
+		if (!miimon) {
+			pr_warn("Warning: miimon must be specified, otherwise bonding will not detect link failure, speed and duplex which are essential for 802.3ad operation\n");
+			pr_warn("Forcing miimon to 100msec\n");
+			miimon = BOND_DEFAULT_MIIMON;
+		}
+	}
+
+	if (tx_queues < 1 || tx_queues > 255) {
+		pr_warn("Warning: tx_queues (%d) should be between 1 and 255, resetting to %d\n",
+			tx_queues, BOND_DEFAULT_TX_QUEUES);
+		tx_queues = BOND_DEFAULT_TX_QUEUES;
+	}
+
+	if ((all_slaves_active != 0) && (all_slaves_active != 1)) {
+		pr_warn("Warning: all_slaves_active module parameter (%d), not of valid value (0/1), so it was set to 0\n",
+			all_slaves_active);
+		all_slaves_active = 0;
+	}
+
+	if (resend_igmp < 0 || resend_igmp > 255) {
+		pr_warn("Warning: resend_igmp (%d) should be between 0 and 255, resetting to %d\n",
+			resend_igmp, BOND_DEFAULT_RESEND_IGMP);
+		resend_igmp = BOND_DEFAULT_RESEND_IGMP;
+	}
+
+	bond_opt_initval(&newval, packets_per_slave);
+	if (!bond_opt_parse(bond_opt_get(BOND_OPT_PACKETS_PER_SLAVE), &newval)) {
+		pr_warn("Warning: packets_per_slave (%d) should be between 0 and %u resetting to 1\n",
+			packets_per_slave, USHRT_MAX);
+		packets_per_slave = 1;
+	}
+
+	if (bond_mode == BOND_MODE_ALB) {
+		pr_notice("In ALB mode you might experience client disconnections upon reconnection of a link if the bonding module updelay parameter (%d msec) is incompatible with the forwarding delay time of the switch\n",
+			  updelay);
+	}
+
+	if (!miimon) {
+		if (updelay || downdelay) {
+			/* just warn the user the up/down delay will have
+			 * no effect since miimon is zero...
+			 */
+			pr_warn("Warning: miimon module parameter not set and updelay (%d) or downdelay (%d) module parameter is set; updelay and downdelay have no effect unless miimon is set\n",
+				updelay, downdelay);
+		}
+	} else {
+		/* don't allow arp monitoring */
+		if (arp_interval) {
+			pr_warn("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
+				miimon, arp_interval);
+			arp_interval = 0;
+		}
+
+		if ((updelay % miimon) != 0) {
+			pr_warn("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
+				updelay, miimon, (updelay / miimon) * miimon);
+		}
+
+		updelay /= miimon;
+
+		if ((downdelay % miimon) != 0) {
+			pr_warn("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
+				downdelay, miimon,
+				(downdelay / miimon) * miimon);
+		}
+
+		downdelay /= miimon;
+	}
+
+	if (arp_interval < 0) {
+		pr_warn("Warning: arp_interval module parameter (%d), not in range 0-%d, so it was reset to 0\n",
+			arp_interval, INT_MAX);
+		arp_interval = 0;
+	}
+
+	for (arp_ip_count = 0, i = 0;
+	     (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[i]; i++) {
+		__be32 ip;
+
+		/* not a complete check, but good enough to catch mistakes */
+		if (!in4_pton(arp_ip_target[i], -1, (u8 *)&ip, -1, NULL) ||
+		    !bond_is_ip_target_ok(ip)) {
+			pr_warn("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
+				arp_ip_target[i]);
+			arp_interval = 0;
+		} else {
+			if (bond_get_targets_ip(arp_target, ip) == -1)
+				arp_target[arp_ip_count++] = ip;
+			else
+				pr_warn("Warning: duplicate address %pI4 in arp_ip_target, skipping\n",
+					&ip);
+		}
+	}
+
+	if (arp_interval && !arp_ip_count) {
+		/* don't allow arping if no arp_ip_target given... */
+		pr_warn("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
+			arp_interval);
+		arp_interval = 0;
+	}
+
+	if (arp_validate) {
+		if (!arp_interval) {
+			pr_err("arp_validate requires arp_interval\n");
+			return -EINVAL;
+		}
+
+		bond_opt_initstr(&newval, arp_validate);
+		valptr = bond_opt_parse(bond_opt_get(BOND_OPT_ARP_VALIDATE),
+					&newval);
+		if (!valptr) {
+			pr_err("Error: invalid arp_validate \"%s\"\n",
+			       arp_validate);
+			return -EINVAL;
+		}
+		arp_validate_value = valptr->value;
+	} else {
+		arp_validate_value = 0;
+	}
+
+	if (arp_all_targets) {
+		bond_opt_initstr(&newval, arp_all_targets);
+		valptr = bond_opt_parse(bond_opt_get(BOND_OPT_ARP_ALL_TARGETS),
+					&newval);
+		if (!valptr) {
+			pr_err("Error: invalid arp_all_targets_value \"%s\"\n",
+			       arp_all_targets);
+			arp_all_targets_value = 0;
+		} else {
+			arp_all_targets_value = valptr->value;
+		}
+	}
+
+	if (miimon) {
+		pr_info("MII link monitoring set to %d ms\n", miimon);
+	} else if (arp_interval) {
+		valptr = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
+					  arp_validate_value);
+		pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
+			arp_interval, valptr->string, arp_ip_count);
+
+		for (i = 0; i < arp_ip_count; i++)
+			pr_cont(" %s", arp_ip_target[i]);
+
+		pr_cont("\n");
+
+	} else if (max_bonds) {
+		/* miimon and arp_interval not set, we need one so things
+		 * work as expected, see bonding.txt for details
+		 */
+		pr_debug("Warning: either miimon or arp_interval and arp_ip_target module parameters must be specified, otherwise bonding will not detect link failures! see bonding.txt for details\n");
+	}
+
+	if (primary && !bond_mode_uses_primary(bond_mode)) {
+		/* currently, using a primary only makes sense
+		 * in active backup, TLB or ALB modes
+		 */
+		pr_warn("Warning: %s primary device specified but has no effect in %s mode\n",
+			primary, bond_mode_name(bond_mode));
+		primary = NULL;
+	}
+
+	if (primary && primary_reselect) {
+		bond_opt_initstr(&newval, primary_reselect);
+		valptr = bond_opt_parse(bond_opt_get(BOND_OPT_PRIMARY_RESELECT),
+					&newval);
+		if (!valptr) {
+			pr_err("Error: Invalid primary_reselect \"%s\"\n",
+			       primary_reselect);
+			return -EINVAL;
+		}
+		primary_reselect_value = valptr->value;
+	} else {
+		primary_reselect_value = BOND_PRI_RESELECT_ALWAYS;
+	}
+
+	if (fail_over_mac) {
+		bond_opt_initstr(&newval, fail_over_mac);
+		valptr = bond_opt_parse(bond_opt_get(BOND_OPT_FAIL_OVER_MAC),
+					&newval);
+		if (!valptr) {
+			pr_err("Error: invalid fail_over_mac \"%s\"\n",
+			       fail_over_mac);
+			return -EINVAL;
+		}
+		fail_over_mac_value = valptr->value;
+		if (bond_mode != BOND_MODE_ACTIVEBACKUP)
+			pr_warn("Warning: fail_over_mac only affects active-backup mode\n");
+	} else {
+		fail_over_mac_value = BOND_FOM_NONE;
+	}
+
+	bond_opt_initstr(&newval, "default");
+	valptr = bond_opt_parse(
+			bond_opt_get(BOND_OPT_AD_ACTOR_SYS_PRIO),
+				     &newval);
+	if (!valptr) {
+		pr_err("Error: No ad_actor_sys_prio default value");
+		return -EINVAL;
+	}
+	ad_actor_sys_prio = valptr->value;
+
+	valptr = bond_opt_parse(bond_opt_get(BOND_OPT_AD_USER_PORT_KEY),
+				&newval);
+	if (!valptr) {
+		pr_err("Error: No ad_user_port_key default value");
+		return -EINVAL;
+	}
+	ad_user_port_key = valptr->value;
+
+	bond_opt_initstr(&newval, "default");
+	valptr = bond_opt_parse(bond_opt_get(BOND_OPT_TLB_DYNAMIC_LB), &newval);
+	if (!valptr) {
+		pr_err("Error: No tlb_dynamic_lb default value");
+		return -EINVAL;
+	}
+	tlb_dynamic_lb = valptr->value;
+
+	if (lp_interval == 0) {
+		pr_warn("Warning: ip_interval must be between 1 and %d, so it was reset to %d\n",
+			INT_MAX, BOND_ALB_DEFAULT_LP_INTERVAL);
+		lp_interval = BOND_ALB_DEFAULT_LP_INTERVAL;
+	}
+
+	/* fill params struct with the proper values */
+	params->mode = bond_mode;
+	params->xmit_policy = xmit_hashtype;
+	params->miimon = miimon;
+	params->num_peer_notif = num_peer_notif;
+	params->arp_interval = arp_interval;
+	params->arp_validate = arp_validate_value;
+	params->arp_all_targets = arp_all_targets_value;
+	params->updelay = updelay;
+	params->downdelay = downdelay;
+	params->use_carrier = use_carrier;
+	params->lacp_fast = lacp_fast;
+	params->primary[0] = 0;
+	params->primary_reselect = primary_reselect_value;
+	params->fail_over_mac = fail_over_mac_value;
+	params->tx_queues = tx_queues;
+	params->all_slaves_active = all_slaves_active;
+	params->resend_igmp = resend_igmp;
+	params->min_links = min_links;
+	params->lp_interval = lp_interval;
+	params->packets_per_slave = packets_per_slave;
+	params->tlb_dynamic_lb = tlb_dynamic_lb;
+	params->ad_actor_sys_prio = ad_actor_sys_prio;
+	eth_zero_addr(params->ad_actor_system);
+	params->ad_user_port_key = ad_user_port_key;
+	if (packets_per_slave > 0) {
+		params->reciprocal_packets_per_slave =
+			reciprocal_value(packets_per_slave);
+	} else {
+		/* reciprocal_packets_per_slave is unused if
+		 * packets_per_slave is 0 or 1, just initialize it
+		 */
+		params->reciprocal_packets_per_slave =
+			(struct reciprocal_value) { 0 };
+	}
+
+	if (primary) {
+		strncpy(params->primary, primary, IFNAMSIZ);
+		params->primary[IFNAMSIZ - 1] = 0;
+	}
+
+	memcpy(params->arp_targets, arp_target, sizeof(arp_target));
+
+	return 0;
+}
+
+/* Called from registration process */
+static int bond_init(struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
+
+	netdev_dbg(bond_dev, "Begin bond_init\n");
+
+	bond->wq = alloc_ordered_workqueue(bond_dev->name, WQ_MEM_RECLAIM);
+	if (!bond->wq)
+		return -ENOMEM;
+
+	bond->nest_level = SINGLE_DEPTH_NESTING;
+	netdev_lockdep_set_classes(bond_dev);
+
+	list_add_tail(&bond->bond_list, &bn->dev_list);
+
+	bond_prepare_sysfs_group(bond);
+
+	bond_debug_register(bond);
+
+	/* Ensure valid dev_addr */
+	if (is_zero_ether_addr(bond_dev->dev_addr) &&
+	    bond_dev->addr_assign_type == NET_ADDR_PERM)
+		eth_hw_addr_random(bond_dev);
+
+	return 0;
+}
+
+unsigned int bond_get_num_tx_queues(void)
+{
+	return tx_queues;
+}
+
+/* Create a new bond based on the specified name and bonding parameters.
+ * If name is NULL, obtain a suitable "bond%d" name for us.
+ * Caller must NOT hold rtnl_lock; we need to release it here before we
+ * set up our sysfs entries.
+ */
+int bond_create(struct net *net, const char *name)
+{
+	struct net_device *bond_dev;
+	struct bonding *bond;
+	struct alb_bond_info *bond_info;
+	int res;
+
+	rtnl_lock();
+
+	bond_dev = alloc_netdev_mq(sizeof(struct bonding),
+				   name ? name : "bond%d", NET_NAME_UNKNOWN,
+				   bond_setup, tx_queues);
+	if (!bond_dev) {
+		pr_err("%s: eek! can't alloc netdev!\n", name);
+		rtnl_unlock();
+		return -ENOMEM;
+	}
+
+	/*
+	 * Initialize rx_hashtbl_used_head to RLB_NULL_INDEX.
+	 * It is set to 0 by default which is wrong.
+	 */
+	bond = netdev_priv(bond_dev);
+	bond_info = &(BOND_ALB_INFO(bond));
+	bond_info->rx_hashtbl_used_head = RLB_NULL_INDEX;
+
+	dev_net_set(bond_dev, net);
+	bond_dev->rtnl_link_ops = &bond_link_ops;
+
+	res = register_netdevice(bond_dev);
+	if (res < 0) {
+		free_netdev(bond_dev);
+		rtnl_unlock();
+
+		return res;
+	}
+
+	netif_carrier_off(bond_dev);
+
+	bond_work_init_all(bond);
+
+	rtnl_unlock();
+	return 0;
+}
+
+static int __net_init bond_net_init(struct net *net)
+{
+	struct bond_net *bn = net_generic(net, bond_net_id);
+
+	bn->net = net;
+	INIT_LIST_HEAD(&bn->dev_list);
+
+	bond_create_proc_dir(bn);
+	bond_create_sysfs(bn);
+
+	return 0;
+}
+
+static void __net_exit bond_net_exit(struct net *net)
+{
+	struct bond_net *bn = net_generic(net, bond_net_id);
+	struct bonding *bond, *tmp_bond;
+	LIST_HEAD(list);
+
+	bond_destroy_sysfs(bn);
+
+	/* Kill off any bonds created after unregistering bond rtnl ops */
+	rtnl_lock();
+	list_for_each_entry_safe(bond, tmp_bond, &bn->dev_list, bond_list)
+		unregister_netdevice_queue(bond->dev, &list);
+	unregister_netdevice_many(&list);
+	rtnl_unlock();
+
+	bond_destroy_proc_dir(bn);
+}
+
+static struct pernet_operations bond_net_ops = {
+	.init = bond_net_init,
+	.exit = bond_net_exit,
+	.id   = &bond_net_id,
+	.size = sizeof(struct bond_net),
+};
+
+static int __init bonding_init(void)
+{
+	int i;
+	int res;
+
+	pr_info("%s", bond_version);
+
+	res = bond_check_params(&bonding_defaults);
+	if (res)
+		goto out;
+
+	res = register_pernet_subsys(&bond_net_ops);
+	if (res)
+		goto out;
+
+	res = bond_netlink_init();
+	if (res)
+		goto err_link;
+
+	bond_create_debugfs();
+
+	for (i = 0; i < max_bonds; i++) {
+		res = bond_create(&init_net, NULL);
+		if (res)
+			goto err;
+	}
+
+	register_netdevice_notifier(&bond_netdev_notifier);
+out:
+	return res;
+err:
+	bond_destroy_debugfs();
+	bond_netlink_fini();
+err_link:
+	unregister_pernet_subsys(&bond_net_ops);
+	goto out;
+
+}
+
+static void __exit bonding_exit(void)
+{
+	unregister_netdevice_notifier(&bond_netdev_notifier);
+
+	bond_destroy_debugfs();
+
+	bond_netlink_fini();
+	unregister_pernet_subsys(&bond_net_ops);
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	/* Make sure we don't have an imbalance on our netpoll blocking */
+	WARN_ON(atomic_read(&netpoll_block_tx));
+#endif
+}
+
+module_init(bonding_init);
+module_exit(bonding_exit);
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
+MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");