Adding upstream version 6.6.15.upstream/6.6.15

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

11 files changed, 15259 insertions, 0 deletions

diff --git a/drivers/net/bonding/Makefile b/drivers/net/bonding/Makefile
new file mode 100644
index 0000000000..30e8ae3da2
--- /dev/null
+++ b/drivers/net/bonding/Makefile
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the Ethernet Bonding driver
+#
+
+obj-$(CONFIG_BONDING) += bonding.o
+
+bonding-objs := bond_main.o bond_3ad.o bond_alb.o bond_sysfs.o bond_sysfs_slave.o bond_debugfs.o bond_netlink.o bond_options.o
+
+proc-$(CONFIG_PROC_FS) += bond_procfs.o
+bonding-objs += $(proc-y)
+
diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
new file mode 100644
index 0000000000..c99ffe6c68
--- /dev/null
+++ b/drivers/net/bonding/bond_3ad.c
@@ -0,0 +1,2793 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
+ */
+
+#include <linux/skbuff.h>
+#include <linux/if_ether.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+#include <linux/ethtool.h>
+#include <linux/etherdevice.h>
+#include <linux/if_bonding.h>
+#include <linux/pkt_sched.h>
+#include <net/net_namespace.h>
+#include <net/bonding.h>
+#include <net/bond_3ad.h>
+#include <net/netlink.h>
+
+/* General definitions */
+#define AD_SHORT_TIMEOUT           1
+#define AD_LONG_TIMEOUT            0
+#define AD_STANDBY                 0x2
+#define AD_MAX_TX_IN_SECOND        3
+#define AD_COLLECTOR_MAX_DELAY     0
+
+/* Timer definitions (43.4.4 in the 802.3ad standard) */
+#define AD_FAST_PERIODIC_TIME      1
+#define AD_SLOW_PERIODIC_TIME      30
+#define AD_SHORT_TIMEOUT_TIME      (3*AD_FAST_PERIODIC_TIME)
+#define AD_LONG_TIMEOUT_TIME       (3*AD_SLOW_PERIODIC_TIME)
+#define AD_CHURN_DETECTION_TIME    60
+#define AD_AGGREGATE_WAIT_TIME     2
+
+/* Port Variables definitions used by the State Machines (43.4.7 in the
+ * 802.3ad standard)
+ */
+#define AD_PORT_BEGIN           0x1
+#define AD_PORT_LACP_ENABLED    0x2
+#define AD_PORT_ACTOR_CHURN     0x4
+#define AD_PORT_PARTNER_CHURN   0x8
+#define AD_PORT_READY           0x10
+#define AD_PORT_READY_N         0x20
+#define AD_PORT_MATCHED         0x40
+#define AD_PORT_STANDBY         0x80
+#define AD_PORT_SELECTED        0x100
+#define AD_PORT_MOVED           0x200
+#define AD_PORT_CHURNED         (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN)
+
+/* Port Key definitions
+ * key is determined according to the link speed, duplex and
+ * user key (which is yet not supported)
+ *           --------------------------------------------------------------
+ * Port key  | User key (10 bits)           | Speed (5 bits)      | Duplex|
+ *           --------------------------------------------------------------
+ *           |15                           6|5                   1|0
+ */
+#define  AD_DUPLEX_KEY_MASKS    0x1
+#define  AD_SPEED_KEY_MASKS     0x3E
+#define  AD_USER_KEY_MASKS      0xFFC0
+
+enum ad_link_speed_type {
+	AD_LINK_SPEED_1MBPS = 1,
+	AD_LINK_SPEED_10MBPS,
+	AD_LINK_SPEED_100MBPS,
+	AD_LINK_SPEED_1000MBPS,
+	AD_LINK_SPEED_2500MBPS,
+	AD_LINK_SPEED_5000MBPS,
+	AD_LINK_SPEED_10000MBPS,
+	AD_LINK_SPEED_14000MBPS,
+	AD_LINK_SPEED_20000MBPS,
+	AD_LINK_SPEED_25000MBPS,
+	AD_LINK_SPEED_40000MBPS,
+	AD_LINK_SPEED_50000MBPS,
+	AD_LINK_SPEED_56000MBPS,
+	AD_LINK_SPEED_100000MBPS,
+	AD_LINK_SPEED_200000MBPS,
+	AD_LINK_SPEED_400000MBPS,
+	AD_LINK_SPEED_800000MBPS,
+};
+
+/* compare MAC addresses */
+#define MAC_ADDRESS_EQUAL(A, B)	\
+	ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
+
+static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = {
+	0, 0, 0, 0, 0, 0
+};
+
+static const u16 ad_ticks_per_sec = 1000 / AD_TIMER_INTERVAL;
+static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
+
+const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned = {
+	0x01, 0x80, 0xC2, 0x00, 0x00, 0x02
+};
+
+/* ================= main 802.3ad protocol functions ================== */
+static int ad_lacpdu_send(struct port *port);
+static int ad_marker_send(struct port *port, struct bond_marker *marker);
+static void ad_mux_machine(struct port *port, bool *update_slave_arr);
+static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
+static void ad_tx_machine(struct port *port);
+static void ad_periodic_machine(struct port *port, struct bond_params *bond_params);
+static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
+static void ad_agg_selection_logic(struct aggregator *aggregator,
+				   bool *update_slave_arr);
+static void ad_clear_agg(struct aggregator *aggregator);
+static void ad_initialize_agg(struct aggregator *aggregator);
+static void ad_initialize_port(struct port *port, int lacp_fast);
+static void ad_enable_collecting_distributing(struct port *port,
+					      bool *update_slave_arr);
+static void ad_disable_collecting_distributing(struct port *port,
+					       bool *update_slave_arr);
+static void ad_marker_info_received(struct bond_marker *marker_info,
+				    struct port *port);
+static void ad_marker_response_received(struct bond_marker *marker,
+					struct port *port);
+static void ad_update_actor_keys(struct port *port, bool reset);
+
+
+/* ================= api to bonding and kernel code ================== */
+
+/**
+ * __get_bond_by_port - get the port's bonding struct
+ * @port: the port we're looking at
+ *
+ * Return @port's bonding struct, or %NULL if it can't be found.
+ */
+static inline struct bonding *__get_bond_by_port(struct port *port)
+{
+	if (port->slave == NULL)
+		return NULL;
+
+	return bond_get_bond_by_slave(port->slave);
+}
+
+/**
+ * __get_first_agg - get the first aggregator in the bond
+ * @port: the port we're looking at
+ *
+ * Return the aggregator of the first slave in @bond, or %NULL if it can't be
+ * found.
+ * The caller must hold RCU or RTNL lock.
+ */
+static inline struct aggregator *__get_first_agg(struct port *port)
+{
+	struct bonding *bond = __get_bond_by_port(port);
+	struct slave *first_slave;
+	struct aggregator *agg;
+
+	/* If there's no bond for this port, or bond has no slaves */
+	if (bond == NULL)
+		return NULL;
+
+	rcu_read_lock();
+	first_slave = bond_first_slave_rcu(bond);
+	agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
+	rcu_read_unlock();
+
+	return agg;
+}
+
+/**
+ * __agg_has_partner - see if we have a partner
+ * @agg: the agregator we're looking at
+ *
+ * Return nonzero if aggregator has a partner (denoted by a non-zero ether
+ * address for the partner). Return 0 if not.
+ */
+static inline int __agg_has_partner(struct aggregator *agg)
+{
+	return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
+}
+
+/**
+ * __disable_port - disable the port's slave
+ * @port: the port we're looking at
+ */
+static inline void __disable_port(struct port *port)
+{
+	bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
+}
+
+/**
+ * __enable_port - enable the port's slave, if it's up
+ * @port: the port we're looking at
+ */
+static inline void __enable_port(struct port *port)
+{
+	struct slave *slave = port->slave;
+
+	if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
+		bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
+}
+
+/**
+ * __port_is_enabled - check if the port's slave is in active state
+ * @port: the port we're looking at
+ */
+static inline int __port_is_enabled(struct port *port)
+{
+	return bond_is_active_slave(port->slave);
+}
+
+/**
+ * __get_agg_selection_mode - get the aggregator selection mode
+ * @port: the port we're looking at
+ *
+ * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
+ */
+static inline u32 __get_agg_selection_mode(struct port *port)
+{
+	struct bonding *bond = __get_bond_by_port(port);
+
+	if (bond == NULL)
+		return BOND_AD_STABLE;
+
+	return bond->params.ad_select;
+}
+
+/**
+ * __check_agg_selection_timer - check if the selection timer has expired
+ * @port: the port we're looking at
+ */
+static inline int __check_agg_selection_timer(struct port *port)
+{
+	struct bonding *bond = __get_bond_by_port(port);
+
+	if (bond == NULL)
+		return 0;
+
+	return atomic_read(&BOND_AD_INFO(bond).agg_select_timer) ? 1 : 0;
+}
+
+/**
+ * __get_link_speed - get a port's speed
+ * @port: the port we're looking at
+ *
+ * Return @port's speed in 802.3ad enum format. i.e. one of:
+ *     0,
+ *     %AD_LINK_SPEED_10MBPS,
+ *     %AD_LINK_SPEED_100MBPS,
+ *     %AD_LINK_SPEED_1000MBPS,
+ *     %AD_LINK_SPEED_2500MBPS,
+ *     %AD_LINK_SPEED_5000MBPS,
+ *     %AD_LINK_SPEED_10000MBPS
+ *     %AD_LINK_SPEED_14000MBPS,
+ *     %AD_LINK_SPEED_20000MBPS
+ *     %AD_LINK_SPEED_25000MBPS
+ *     %AD_LINK_SPEED_40000MBPS
+ *     %AD_LINK_SPEED_50000MBPS
+ *     %AD_LINK_SPEED_56000MBPS
+ *     %AD_LINK_SPEED_100000MBPS
+ *     %AD_LINK_SPEED_200000MBPS
+ *     %AD_LINK_SPEED_400000MBPS
+ *     %AD_LINK_SPEED_800000MBPS
+ */
+static u16 __get_link_speed(struct port *port)
+{
+	struct slave *slave = port->slave;
+	u16 speed;
+
+	/* this if covers only a special case: when the configuration starts
+	 * with link down, it sets the speed to 0.
+	 * This is done in spite of the fact that the e100 driver reports 0
+	 * to be compatible with MVT in the future.
+	 */
+	if (slave->link != BOND_LINK_UP)
+		speed = 0;
+	else {
+		switch (slave->speed) {
+		case SPEED_10:
+			speed = AD_LINK_SPEED_10MBPS;
+			break;
+
+		case SPEED_100:
+			speed = AD_LINK_SPEED_100MBPS;
+			break;
+
+		case SPEED_1000:
+			speed = AD_LINK_SPEED_1000MBPS;
+			break;
+
+		case SPEED_2500:
+			speed = AD_LINK_SPEED_2500MBPS;
+			break;
+
+		case SPEED_5000:
+			speed = AD_LINK_SPEED_5000MBPS;
+			break;
+
+		case SPEED_10000:
+			speed = AD_LINK_SPEED_10000MBPS;
+			break;
+
+		case SPEED_14000:
+			speed = AD_LINK_SPEED_14000MBPS;
+			break;
+
+		case SPEED_20000:
+			speed = AD_LINK_SPEED_20000MBPS;
+			break;
+
+		case SPEED_25000:
+			speed = AD_LINK_SPEED_25000MBPS;
+			break;
+
+		case SPEED_40000:
+			speed = AD_LINK_SPEED_40000MBPS;
+			break;
+
+		case SPEED_50000:
+			speed = AD_LINK_SPEED_50000MBPS;
+			break;
+
+		case SPEED_56000:
+			speed = AD_LINK_SPEED_56000MBPS;
+			break;
+
+		case SPEED_100000:
+			speed = AD_LINK_SPEED_100000MBPS;
+			break;
+
+		case SPEED_200000:
+			speed = AD_LINK_SPEED_200000MBPS;
+			break;
+
+		case SPEED_400000:
+			speed = AD_LINK_SPEED_400000MBPS;
+			break;
+
+		case SPEED_800000:
+			speed = AD_LINK_SPEED_800000MBPS;
+			break;
+
+		default:
+			/* unknown speed value from ethtool. shouldn't happen */
+			if (slave->speed != SPEED_UNKNOWN)
+				pr_err_once("%s: (slave %s): unknown ethtool speed (%d) for port %d (set it to 0)\n",
+					    slave->bond->dev->name,
+					    slave->dev->name, slave->speed,
+					    port->actor_port_number);
+			speed = 0;
+			break;
+		}
+	}
+
+	slave_dbg(slave->bond->dev, slave->dev, "Port %d Received link speed %d update from adapter\n",
+		  port->actor_port_number, speed);
+	return speed;
+}
+
+/**
+ * __get_duplex - get a port's duplex
+ * @port: the port we're looking at
+ *
+ * Return @port's duplex in 802.3ad bitmask format. i.e.:
+ *     0x01 if in full duplex
+ *     0x00 otherwise
+ */
+static u8 __get_duplex(struct port *port)
+{
+	struct slave *slave = port->slave;
+	u8 retval = 0x0;
+
+	/* handling a special case: when the configuration starts with
+	 * link down, it sets the duplex to 0.
+	 */
+	if (slave->link == BOND_LINK_UP) {
+		switch (slave->duplex) {
+		case DUPLEX_FULL:
+			retval = 0x1;
+			slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status full duplex update from adapter\n",
+				  port->actor_port_number);
+			break;
+		case DUPLEX_HALF:
+		default:
+			retval = 0x0;
+			slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status NOT full duplex update from adapter\n",
+				  port->actor_port_number);
+			break;
+		}
+	}
+	return retval;
+}
+
+static void __ad_actor_update_port(struct port *port)
+{
+	const struct bonding *bond = bond_get_bond_by_slave(port->slave);
+
+	port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
+	port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority;
+}
+
+/* Conversions */
+
+/**
+ * __ad_timer_to_ticks - convert a given timer type to AD module ticks
+ * @timer_type:	which timer to operate
+ * @par: timer parameter. see below
+ *
+ * If @timer_type is %current_while_timer, @par indicates long/short timer.
+ * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
+ *						     %SLOW_PERIODIC_TIME.
+ */
+static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
+{
+	u16 retval = 0; /* to silence the compiler */
+
+	switch (timer_type) {
+	case AD_CURRENT_WHILE_TIMER:	/* for rx machine usage */
+		if (par)
+			retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
+		else
+			retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
+		break;
+	case AD_ACTOR_CHURN_TIMER:	/* for local churn machine */
+		retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
+		break;
+	case AD_PERIODIC_TIMER:		/* for periodic machine */
+		retval = (par*ad_ticks_per_sec); /* long timeout */
+		break;
+	case AD_PARTNER_CHURN_TIMER:	/* for remote churn machine */
+		retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
+		break;
+	case AD_WAIT_WHILE_TIMER:	/* for selection machine */
+		retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
+		break;
+	}
+
+	return retval;
+}
+
+
+/* ================= ad_rx_machine helper functions ================== */
+
+/**
+ * __choose_matched - update a port's matched variable from a received lacpdu
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * Update the value of the matched variable, using parameter values from a
+ * newly received lacpdu. Parameter values for the partner carried in the
+ * received PDU are compared with the corresponding operational parameter
+ * values for the actor. Matched is set to TRUE if all of these parameters
+ * match and the PDU parameter partner_state.aggregation has the same value as
+ * actor_oper_port_state.aggregation and lacp will actively maintain the link
+ * in the aggregation. Matched is also set to TRUE if the value of
+ * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
+ * an individual link and lacp will actively maintain the link. Otherwise,
+ * matched is set to FALSE. LACP is considered to be actively maintaining the
+ * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
+ * the actor's actor_oper_port_state.lacp_activity and the PDU's
+ * partner_state.lacp_activity variables are TRUE.
+ *
+ * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
+ * used here to implement the language from 802.3ad 43.4.9 that requires
+ * recordPDU to "match" the LACPDU parameters to the stored values.
+ */
+static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
+{
+	/* check if all parameters are alike
+	 * or this is individual link(aggregation == FALSE)
+	 * then update the state machine Matched variable.
+	 */
+	if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
+	     (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
+	     MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
+	     (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
+	     (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
+	     ((lacpdu->partner_state & LACP_STATE_AGGREGATION) == (port->actor_oper_port_state & LACP_STATE_AGGREGATION))) ||
+	    ((lacpdu->actor_state & LACP_STATE_AGGREGATION) == 0)
+		) {
+		port->sm_vars |= AD_PORT_MATCHED;
+	} else {
+		port->sm_vars &= ~AD_PORT_MATCHED;
+	}
+}
+
+/**
+ * __record_pdu - record parameters from a received lacpdu
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * Record the parameter values for the Actor carried in a received lacpdu as
+ * the current partner operational parameter values and sets
+ * actor_oper_port_state.defaulted to FALSE.
+ */
+static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
+{
+	if (lacpdu && port) {
+		struct port_params *partner = &port->partner_oper;
+
+		__choose_matched(lacpdu, port);
+		/* record the new parameter values for the partner
+		 * operational
+		 */
+		partner->port_number = ntohs(lacpdu->actor_port);
+		partner->port_priority = ntohs(lacpdu->actor_port_priority);
+		partner->system = lacpdu->actor_system;
+		partner->system_priority = ntohs(lacpdu->actor_system_priority);
+		partner->key = ntohs(lacpdu->actor_key);
+		partner->port_state = lacpdu->actor_state;
+
+		/* set actor_oper_port_state.defaulted to FALSE */
+		port->actor_oper_port_state &= ~LACP_STATE_DEFAULTED;
+
+		/* set the partner sync. to on if the partner is sync,
+		 * and the port is matched
+		 */
+		if ((port->sm_vars & AD_PORT_MATCHED) &&
+		    (lacpdu->actor_state & LACP_STATE_SYNCHRONIZATION)) {
+			partner->port_state |= LACP_STATE_SYNCHRONIZATION;
+			slave_dbg(port->slave->bond->dev, port->slave->dev,
+				  "partner sync=1\n");
+		} else {
+			partner->port_state &= ~LACP_STATE_SYNCHRONIZATION;
+			slave_dbg(port->slave->bond->dev, port->slave->dev,
+				  "partner sync=0\n");
+		}
+	}
+}
+
+/**
+ * __record_default - record default parameters
+ * @port: the port we're looking at
+ *
+ * This function records the default parameter values for the partner carried
+ * in the Partner Admin parameters as the current partner operational parameter
+ * values and sets actor_oper_port_state.defaulted to TRUE.
+ */
+static void __record_default(struct port *port)
+{
+	if (port) {
+		/* record the partner admin parameters */
+		memcpy(&port->partner_oper, &port->partner_admin,
+		       sizeof(struct port_params));
+
+		/* set actor_oper_port_state.defaulted to true */
+		port->actor_oper_port_state |= LACP_STATE_DEFAULTED;
+	}
+}
+
+/**
+ * __update_selected - update a port's Selected variable from a received lacpdu
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * Update the value of the selected variable, using parameter values from a
+ * newly received lacpdu. The parameter values for the Actor carried in the
+ * received PDU are compared with the corresponding operational parameter
+ * values for the ports partner. If one or more of the comparisons shows that
+ * the value(s) received in the PDU differ from the current operational values,
+ * then selected is set to FALSE and actor_oper_port_state.synchronization is
+ * set to out_of_sync. Otherwise, selected remains unchanged.
+ */
+static void __update_selected(struct lacpdu *lacpdu, struct port *port)
+{
+	if (lacpdu && port) {
+		const struct port_params *partner = &port->partner_oper;
+
+		/* check if any parameter is different then
+		 * update the state machine selected variable.
+		 */
+		if (ntohs(lacpdu->actor_port) != partner->port_number ||
+		    ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
+		    !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
+		    ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
+		    ntohs(lacpdu->actor_key) != partner->key ||
+		    (lacpdu->actor_state & LACP_STATE_AGGREGATION) != (partner->port_state & LACP_STATE_AGGREGATION)) {
+			port->sm_vars &= ~AD_PORT_SELECTED;
+		}
+	}
+}
+
+/**
+ * __update_default_selected - update a port's Selected variable from Partner
+ * @port: the port we're looking at
+ *
+ * This function updates the value of the selected variable, using the partner
+ * administrative parameter values. The administrative values are compared with
+ * the corresponding operational parameter values for the partner. If one or
+ * more of the comparisons shows that the administrative value(s) differ from
+ * the current operational values, then Selected is set to FALSE and
+ * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
+ * Selected remains unchanged.
+ */
+static void __update_default_selected(struct port *port)
+{
+	if (port) {
+		const struct port_params *admin = &port->partner_admin;
+		const struct port_params *oper = &port->partner_oper;
+
+		/* check if any parameter is different then
+		 * update the state machine selected variable.
+		 */
+		if (admin->port_number != oper->port_number ||
+		    admin->port_priority != oper->port_priority ||
+		    !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
+		    admin->system_priority != oper->system_priority ||
+		    admin->key != oper->key ||
+		    (admin->port_state & LACP_STATE_AGGREGATION)
+			!= (oper->port_state & LACP_STATE_AGGREGATION)) {
+			port->sm_vars &= ~AD_PORT_SELECTED;
+		}
+	}
+}
+
+/**
+ * __update_ntt - update a port's ntt variable from a received lacpdu
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * Updates the value of the ntt variable, using parameter values from a newly
+ * received lacpdu. The parameter values for the partner carried in the
+ * received PDU are compared with the corresponding operational parameter
+ * values for the Actor. If one or more of the comparisons shows that the
+ * value(s) received in the PDU differ from the current operational values,
+ * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
+ */
+static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
+{
+	/* validate lacpdu and port */
+	if (lacpdu && port) {
+		/* check if any parameter is different then
+		 * update the port->ntt.
+		 */
+		if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
+		    (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
+		    !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
+		    (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
+		    (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
+		    ((lacpdu->partner_state & LACP_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY)) ||
+		    ((lacpdu->partner_state & LACP_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)) ||
+		    ((lacpdu->partner_state & LACP_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) ||
+		    ((lacpdu->partner_state & LACP_STATE_AGGREGATION) != (port->actor_oper_port_state & LACP_STATE_AGGREGATION))
+		   ) {
+			port->ntt = true;
+		}
+	}
+}
+
+/**
+ * __agg_ports_are_ready - check if all ports in an aggregator are ready
+ * @aggregator: the aggregator we're looking at
+ *
+ */
+static int __agg_ports_are_ready(struct aggregator *aggregator)
+{
+	struct port *port;
+	int retval = 1;
+
+	if (aggregator) {
+		/* scan all ports in this aggregator to verfy if they are
+		 * all ready.
+		 */
+		for (port = aggregator->lag_ports;
+		     port;
+		     port = port->next_port_in_aggregator) {
+			if (!(port->sm_vars & AD_PORT_READY_N)) {
+				retval = 0;
+				break;
+			}
+		}
+	}
+
+	return retval;
+}
+
+/**
+ * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
+ * @aggregator: the aggregator we're looking at
+ * @val: Should the ports' ready bit be set on or off
+ *
+ */
+static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
+{
+	struct port *port;
+
+	for (port = aggregator->lag_ports; port;
+	     port = port->next_port_in_aggregator) {
+		if (val)
+			port->sm_vars |= AD_PORT_READY;
+		else
+			port->sm_vars &= ~AD_PORT_READY;
+	}
+}
+
+static int __agg_active_ports(struct aggregator *agg)
+{
+	struct port *port;
+	int active = 0;
+
+	for (port = agg->lag_ports; port;
+	     port = port->next_port_in_aggregator) {
+		if (port->is_enabled)
+			active++;
+	}
+
+	return active;
+}
+
+/**
+ * __get_agg_bandwidth - get the total bandwidth of an aggregator
+ * @aggregator: the aggregator we're looking at
+ *
+ */
+static u32 __get_agg_bandwidth(struct aggregator *aggregator)
+{
+	int nports = __agg_active_ports(aggregator);
+	u32 bandwidth = 0;
+
+	if (nports) {
+		switch (__get_link_speed(aggregator->lag_ports)) {
+		case AD_LINK_SPEED_1MBPS:
+			bandwidth = nports;
+			break;
+		case AD_LINK_SPEED_10MBPS:
+			bandwidth = nports * 10;
+			break;
+		case AD_LINK_SPEED_100MBPS:
+			bandwidth = nports * 100;
+			break;
+		case AD_LINK_SPEED_1000MBPS:
+			bandwidth = nports * 1000;
+			break;
+		case AD_LINK_SPEED_2500MBPS:
+			bandwidth = nports * 2500;
+			break;
+		case AD_LINK_SPEED_5000MBPS:
+			bandwidth = nports * 5000;
+			break;
+		case AD_LINK_SPEED_10000MBPS:
+			bandwidth = nports * 10000;
+			break;
+		case AD_LINK_SPEED_14000MBPS:
+			bandwidth = nports * 14000;
+			break;
+		case AD_LINK_SPEED_20000MBPS:
+			bandwidth = nports * 20000;
+			break;
+		case AD_LINK_SPEED_25000MBPS:
+			bandwidth = nports * 25000;
+			break;
+		case AD_LINK_SPEED_40000MBPS:
+			bandwidth = nports * 40000;
+			break;
+		case AD_LINK_SPEED_50000MBPS:
+			bandwidth = nports * 50000;
+			break;
+		case AD_LINK_SPEED_56000MBPS:
+			bandwidth = nports * 56000;
+			break;
+		case AD_LINK_SPEED_100000MBPS:
+			bandwidth = nports * 100000;
+			break;
+		case AD_LINK_SPEED_200000MBPS:
+			bandwidth = nports * 200000;
+			break;
+		case AD_LINK_SPEED_400000MBPS:
+			bandwidth = nports * 400000;
+			break;
+		case AD_LINK_SPEED_800000MBPS:
+			bandwidth = nports * 800000;
+			break;
+		default:
+			bandwidth = 0; /* to silence the compiler */
+		}
+	}
+	return bandwidth;
+}
+
+/**
+ * __get_active_agg - get the current active aggregator
+ * @aggregator: the aggregator we're looking at
+ *
+ * Caller must hold RCU lock.
+ */
+static struct aggregator *__get_active_agg(struct aggregator *aggregator)
+{
+	struct bonding *bond = aggregator->slave->bond;
+	struct list_head *iter;
+	struct slave *slave;
+
+	bond_for_each_slave_rcu(bond, slave, iter)
+		if (SLAVE_AD_INFO(slave)->aggregator.is_active)
+			return &(SLAVE_AD_INFO(slave)->aggregator);
+
+	return NULL;
+}
+
+/**
+ * __update_lacpdu_from_port - update a port's lacpdu fields
+ * @port: the port we're looking at
+ */
+static inline void __update_lacpdu_from_port(struct port *port)
+{
+	struct lacpdu *lacpdu = &port->lacpdu;
+	const struct port_params *partner = &port->partner_oper;
+
+	/* update current actual Actor parameters
+	 * lacpdu->subtype                   initialized
+	 * lacpdu->version_number            initialized
+	 * lacpdu->tlv_type_actor_info       initialized
+	 * lacpdu->actor_information_length  initialized
+	 */
+
+	lacpdu->actor_system_priority = htons(port->actor_system_priority);
+	lacpdu->actor_system = port->actor_system;
+	lacpdu->actor_key = htons(port->actor_oper_port_key);
+	lacpdu->actor_port_priority = htons(port->actor_port_priority);
+	lacpdu->actor_port = htons(port->actor_port_number);
+	lacpdu->actor_state = port->actor_oper_port_state;
+	slave_dbg(port->slave->bond->dev, port->slave->dev,
+		  "update lacpdu: actor port state %x\n",
+		  port->actor_oper_port_state);
+
+	/* lacpdu->reserved_3_1              initialized
+	 * lacpdu->tlv_type_partner_info     initialized
+	 * lacpdu->partner_information_length initialized
+	 */
+
+	lacpdu->partner_system_priority = htons(partner->system_priority);
+	lacpdu->partner_system = partner->system;
+	lacpdu->partner_key = htons(partner->key);
+	lacpdu->partner_port_priority = htons(partner->port_priority);
+	lacpdu->partner_port = htons(partner->port_number);
+	lacpdu->partner_state = partner->port_state;
+
+	/* lacpdu->reserved_3_2              initialized
+	 * lacpdu->tlv_type_collector_info   initialized
+	 * lacpdu->collector_information_length initialized
+	 * collector_max_delay                initialized
+	 * reserved_12[12]                   initialized
+	 * tlv_type_terminator               initialized
+	 * terminator_length                 initialized
+	 * reserved_50[50]                   initialized
+	 */
+}
+
+/* ================= main 802.3ad protocol code ========================= */
+
+/**
+ * ad_lacpdu_send - send out a lacpdu packet on a given port
+ * @port: the port we're looking at
+ *
+ * Returns:   0 on success
+ *          < 0 on error
+ */
+static int ad_lacpdu_send(struct port *port)
+{
+	struct slave *slave = port->slave;
+	struct sk_buff *skb;
+	struct lacpdu_header *lacpdu_header;
+	int length = sizeof(struct lacpdu_header);
+
+	skb = dev_alloc_skb(length);
+	if (!skb)
+		return -ENOMEM;
+
+	atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_tx);
+	atomic64_inc(&BOND_AD_INFO(slave->bond).stats.lacpdu_tx);
+
+	skb->dev = slave->dev;
+	skb_reset_mac_header(skb);
+	skb->network_header = skb->mac_header + ETH_HLEN;
+	skb->protocol = PKT_TYPE_LACPDU;
+	skb->priority = TC_PRIO_CONTROL;
+
+	lacpdu_header = skb_put(skb, length);
+
+	ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
+	/* Note: source address is set to be the member's PERMANENT address,
+	 * because we use it to identify loopback lacpdus in receive.
+	 */
+	ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
+	lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
+
+	lacpdu_header->lacpdu = port->lacpdu;
+
+	dev_queue_xmit(skb);
+
+	return 0;
+}
+
+/**
+ * ad_marker_send - send marker information/response on a given port
+ * @port: the port we're looking at
+ * @marker: marker data to send
+ *
+ * Returns:   0 on success
+ *          < 0 on error
+ */
+static int ad_marker_send(struct port *port, struct bond_marker *marker)
+{
+	struct slave *slave = port->slave;
+	struct sk_buff *skb;
+	struct bond_marker_header *marker_header;
+	int length = sizeof(struct bond_marker_header);
+
+	skb = dev_alloc_skb(length + 16);
+	if (!skb)
+		return -ENOMEM;
+
+	switch (marker->tlv_type) {
+	case AD_MARKER_INFORMATION_SUBTYPE:
+		atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_tx);
+		atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_tx);
+		break;
+	case AD_MARKER_RESPONSE_SUBTYPE:
+		atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_resp_tx);
+		atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_resp_tx);
+		break;
+	}
+
+	skb_reserve(skb, 16);
+
+	skb->dev = slave->dev;
+	skb_reset_mac_header(skb);
+	skb->network_header = skb->mac_header + ETH_HLEN;
+	skb->protocol = PKT_TYPE_LACPDU;
+
+	marker_header = skb_put(skb, length);
+
+	ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
+	/* Note: source address is set to be the member's PERMANENT address,
+	 * because we use it to identify loopback MARKERs in receive.
+	 */
+	ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
+	marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
+
+	marker_header->marker = *marker;
+
+	dev_queue_xmit(skb);
+
+	return 0;
+}
+
+/**
+ * ad_mux_machine - handle a port's mux state machine
+ * @port: the port we're looking at
+ * @update_slave_arr: Does slave array need update?
+ */
+static void ad_mux_machine(struct port *port, bool *update_slave_arr)
+{
+	mux_states_t last_state;
+
+	/* keep current State Machine state to compare later if it was
+	 * changed
+	 */
+	last_state = port->sm_mux_state;
+
+	if (port->sm_vars & AD_PORT_BEGIN) {
+		port->sm_mux_state = AD_MUX_DETACHED;
+	} else {
+		switch (port->sm_mux_state) {
+		case AD_MUX_DETACHED:
+			if ((port->sm_vars & AD_PORT_SELECTED)
+			    || (port->sm_vars & AD_PORT_STANDBY))
+				/* if SELECTED or STANDBY */
+				port->sm_mux_state = AD_MUX_WAITING;
+			break;
+		case AD_MUX_WAITING:
+			/* if SELECTED == FALSE return to DETACH state */
+			if (!(port->sm_vars & AD_PORT_SELECTED)) {
+				port->sm_vars &= ~AD_PORT_READY_N;
+				/* in order to withhold the Selection Logic to
+				 * check all ports READY_N value every callback
+				 * cycle to update ready variable, we check
+				 * READY_N and update READY here
+				 */
+				__set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
+				port->sm_mux_state = AD_MUX_DETACHED;
+				break;
+			}
+
+			/* check if the wait_while_timer expired */
+			if (port->sm_mux_timer_counter
+			    && !(--port->sm_mux_timer_counter))
+				port->sm_vars |= AD_PORT_READY_N;
+
+			/* in order to withhold the selection logic to check
+			 * all ports READY_N value every callback cycle to
+			 * update ready variable, we check READY_N and update
+			 * READY here
+			 */
+			__set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
+
+			/* if the wait_while_timer expired, and the port is
+			 * in READY state, move to ATTACHED state
+			 */
+			if ((port->sm_vars & AD_PORT_READY)
+			    && !port->sm_mux_timer_counter)
+				port->sm_mux_state = AD_MUX_ATTACHED;
+			break;
+		case AD_MUX_ATTACHED:
+			/* check also if agg_select_timer expired (so the
+			 * edable port will take place only after this timer)
+			 */
+			if ((port->sm_vars & AD_PORT_SELECTED) &&
+			    (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) &&
+			    !__check_agg_selection_timer(port)) {
+				if (port->aggregator->is_active)
+					port->sm_mux_state =
+					    AD_MUX_COLLECTING_DISTRIBUTING;
+			} else if (!(port->sm_vars & AD_PORT_SELECTED) ||
+				   (port->sm_vars & AD_PORT_STANDBY)) {
+				/* if UNSELECTED or STANDBY */
+				port->sm_vars &= ~AD_PORT_READY_N;
+				/* in order to withhold the selection logic to
+				 * check all ports READY_N value every callback
+				 * cycle to update ready variable, we check
+				 * READY_N and update READY here
+				 */
+				__set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
+				port->sm_mux_state = AD_MUX_DETACHED;
+			} else if (port->aggregator->is_active) {
+				port->actor_oper_port_state |=
+				    LACP_STATE_SYNCHRONIZATION;
+			}
+			break;
+		case AD_MUX_COLLECTING_DISTRIBUTING:
+			if (!(port->sm_vars & AD_PORT_SELECTED) ||
+			    (port->sm_vars & AD_PORT_STANDBY) ||
+			    !(port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) ||
+			    !(port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) {
+				port->sm_mux_state = AD_MUX_ATTACHED;
+			} else {
+				/* if port state hasn't changed make
+				 * sure that a collecting distributing
+				 * port in an active aggregator is enabled
+				 */
+				if (port->aggregator &&
+				    port->aggregator->is_active &&
+				    !__port_is_enabled(port)) {
+					__enable_port(port);
+					*update_slave_arr = true;
+				}
+			}
+			break;
+		default:
+			break;
+		}
+	}
+
+	/* check if the state machine was changed */
+	if (port->sm_mux_state != last_state) {
+		slave_dbg(port->slave->bond->dev, port->slave->dev,
+			  "Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",
+			  port->actor_port_number,
+			  last_state,
+			  port->sm_mux_state);
+		switch (port->sm_mux_state) {
+		case AD_MUX_DETACHED:
+			port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;
+			ad_disable_collecting_distributing(port,
+							   update_slave_arr);
+			port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;
+			port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;
+			port->ntt = true;
+			break;
+		case AD_MUX_WAITING:
+			port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
+			break;
+		case AD_MUX_ATTACHED:
+			if (port->aggregator->is_active)
+				port->actor_oper_port_state |=
+				    LACP_STATE_SYNCHRONIZATION;
+			else
+				port->actor_oper_port_state &=
+				    ~LACP_STATE_SYNCHRONIZATION;
+			port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;
+			port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;
+			ad_disable_collecting_distributing(port,
+							   update_slave_arr);
+			port->ntt = true;
+			break;
+		case AD_MUX_COLLECTING_DISTRIBUTING:
+			port->actor_oper_port_state |= LACP_STATE_COLLECTING;
+			port->actor_oper_port_state |= LACP_STATE_DISTRIBUTING;
+			port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION;
+			ad_enable_collecting_distributing(port,
+							  update_slave_arr);
+			port->ntt = true;
+			break;
+		default:
+			break;
+		}
+	}
+}
+
+/**
+ * ad_rx_machine - handle a port's rx State Machine
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * If lacpdu arrived, stop previous timer (if exists) and set the next state as
+ * CURRENT. If timer expired set the state machine in the proper state.
+ * In other cases, this function checks if we need to switch to other state.
+ */
+static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
+{
+	rx_states_t last_state;
+
+	/* keep current State Machine state to compare later if it was
+	 * changed
+	 */
+	last_state = port->sm_rx_state;
+
+	if (lacpdu) {
+		atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.lacpdu_rx);
+		atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.lacpdu_rx);
+	}
+	/* check if state machine should change state */
+
+	/* first, check if port was reinitialized */
+	if (port->sm_vars & AD_PORT_BEGIN) {
+		port->sm_rx_state = AD_RX_INITIALIZE;
+		port->sm_vars |= AD_PORT_CHURNED;
+	/* check if port is not enabled */
+	} else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled)
+		port->sm_rx_state = AD_RX_PORT_DISABLED;
+	/* check if new lacpdu arrived */
+	else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
+		 (port->sm_rx_state == AD_RX_DEFAULTED) ||
+		 (port->sm_rx_state == AD_RX_CURRENT))) {
+		if (port->sm_rx_state != AD_RX_CURRENT)
+			port->sm_vars |= AD_PORT_CHURNED;
+		port->sm_rx_timer_counter = 0;
+		port->sm_rx_state = AD_RX_CURRENT;
+	} else {
+		/* if timer is on, and if it is expired */
+		if (port->sm_rx_timer_counter &&
+		    !(--port->sm_rx_timer_counter)) {
+			switch (port->sm_rx_state) {
+			case AD_RX_EXPIRED:
+				port->sm_rx_state = AD_RX_DEFAULTED;
+				break;
+			case AD_RX_CURRENT:
+				port->sm_rx_state = AD_RX_EXPIRED;
+				break;
+			default:
+				break;
+			}
+		} else {
+			/* if no lacpdu arrived and no timer is on */
+			switch (port->sm_rx_state) {
+			case AD_RX_PORT_DISABLED:
+				if (port->is_enabled &&
+				    (port->sm_vars & AD_PORT_LACP_ENABLED))
+					port->sm_rx_state = AD_RX_EXPIRED;
+				else if (port->is_enabled
+					 && ((port->sm_vars
+					      & AD_PORT_LACP_ENABLED) == 0))
+					port->sm_rx_state = AD_RX_LACP_DISABLED;
+				break;
+			default:
+				break;
+
+			}
+		}
+	}
+
+	/* check if the State machine was changed or new lacpdu arrived */
+	if ((port->sm_rx_state != last_state) || (lacpdu)) {
+		slave_dbg(port->slave->bond->dev, port->slave->dev,
+			  "Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",
+			  port->actor_port_number,
+			  last_state,
+			  port->sm_rx_state);
+		switch (port->sm_rx_state) {
+		case AD_RX_INITIALIZE:
+			if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
+				port->sm_vars &= ~AD_PORT_LACP_ENABLED;
+			else
+				port->sm_vars |= AD_PORT_LACP_ENABLED;
+			port->sm_vars &= ~AD_PORT_SELECTED;
+			__record_default(port);
+			port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
+			port->sm_rx_state = AD_RX_PORT_DISABLED;
+
+			fallthrough;
+		case AD_RX_PORT_DISABLED:
+			port->sm_vars &= ~AD_PORT_MATCHED;
+			break;
+		case AD_RX_LACP_DISABLED:
+			port->sm_vars &= ~AD_PORT_SELECTED;
+			__record_default(port);
+			port->partner_oper.port_state &= ~LACP_STATE_AGGREGATION;
+			port->sm_vars |= AD_PORT_MATCHED;
+			port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
+			break;
+		case AD_RX_EXPIRED:
+			/* Reset of the Synchronization flag (Standard 43.4.12)
+			 * This reset cause to disable this port in the
+			 * COLLECTING_DISTRIBUTING state of the mux machine in
+			 * case of EXPIRED even if LINK_DOWN didn't arrive for
+			 * the port.
+			 */
+			port->partner_oper.port_state &= ~LACP_STATE_SYNCHRONIZATION;
+			port->sm_vars &= ~AD_PORT_MATCHED;
+			port->partner_oper.port_state |= LACP_STATE_LACP_TIMEOUT;
+			port->partner_oper.port_state |= LACP_STATE_LACP_ACTIVITY;
+			port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
+			port->actor_oper_port_state |= LACP_STATE_EXPIRED;
+			port->sm_vars |= AD_PORT_CHURNED;
+			break;
+		case AD_RX_DEFAULTED:
+			__update_default_selected(port);
+			__record_default(port);
+			port->sm_vars |= AD_PORT_MATCHED;
+			port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
+			break;
+		case AD_RX_CURRENT:
+			/* detect loopback situation */
+			if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
+					      &(port->actor_system))) {
+				slave_err(port->slave->bond->dev, port->slave->dev, "An illegal loopback occurred on slave\n"
+					  "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n");
+				return;
+			}
+			__update_selected(lacpdu, port);
+			__update_ntt(lacpdu, port);
+			__record_pdu(lacpdu, port);
+			port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT));
+			port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
+			break;
+		default:
+			break;
+		}
+	}
+}
+
+/**
+ * ad_churn_machine - handle port churn's state machine
+ * @port: the port we're looking at
+ *
+ */
+static void ad_churn_machine(struct port *port)
+{
+	if (port->sm_vars & AD_PORT_CHURNED) {
+		port->sm_vars &= ~AD_PORT_CHURNED;
+		port->sm_churn_actor_state = AD_CHURN_MONITOR;
+		port->sm_churn_partner_state = AD_CHURN_MONITOR;
+		port->sm_churn_actor_timer_counter =
+			__ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0);
+		port->sm_churn_partner_timer_counter =
+			 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0);
+		return;
+	}
+	if (port->sm_churn_actor_timer_counter &&
+	    !(--port->sm_churn_actor_timer_counter) &&
+	    port->sm_churn_actor_state == AD_CHURN_MONITOR) {
+		if (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION) {
+			port->sm_churn_actor_state = AD_NO_CHURN;
+		} else {
+			port->churn_actor_count++;
+			port->sm_churn_actor_state = AD_CHURN;
+		}
+	}
+	if (port->sm_churn_partner_timer_counter &&
+	    !(--port->sm_churn_partner_timer_counter) &&
+	    port->sm_churn_partner_state == AD_CHURN_MONITOR) {
+		if (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) {
+			port->sm_churn_partner_state = AD_NO_CHURN;
+		} else {
+			port->churn_partner_count++;
+			port->sm_churn_partner_state = AD_CHURN;
+		}
+	}
+}
+
+/**
+ * ad_tx_machine - handle a port's tx state machine
+ * @port: the port we're looking at
+ */
+static void ad_tx_machine(struct port *port)
+{
+	/* check if tx timer expired, to verify that we do not send more than
+	 * 3 packets per second
+	 */
+	if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
+		/* check if there is something to send */
+		if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
+			__update_lacpdu_from_port(port);
+
+			if (ad_lacpdu_send(port) >= 0) {
+				slave_dbg(port->slave->bond->dev,
+					  port->slave->dev,
+					  "Sent LACPDU on port %d\n",
+					  port->actor_port_number);
+
+				/* mark ntt as false, so it will not be sent
+				 * again until demanded
+				 */
+				port->ntt = false;
+			}
+		}
+		/* restart tx timer(to verify that we will not exceed
+		 * AD_MAX_TX_IN_SECOND
+		 */
+		port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
+	}
+}
+
+/**
+ * ad_periodic_machine - handle a port's periodic state machine
+ * @port: the port we're looking at
+ * @bond_params: bond parameters we will use
+ *
+ * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
+ */
+static void ad_periodic_machine(struct port *port, struct bond_params *bond_params)
+{
+	periodic_states_t last_state;
+
+	/* keep current state machine state to compare later if it was changed */
+	last_state = port->sm_periodic_state;
+
+	/* check if port was reinitialized */
+	if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
+	    (!(port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & LACP_STATE_LACP_ACTIVITY)) ||
+	    !bond_params->lacp_active) {
+		port->sm_periodic_state = AD_NO_PERIODIC;
+	}
+	/* check if state machine should change state */
+	else if (port->sm_periodic_timer_counter) {
+		/* check if periodic state machine expired */
+		if (!(--port->sm_periodic_timer_counter)) {
+			/* if expired then do tx */
+			port->sm_periodic_state = AD_PERIODIC_TX;
+		} else {
+			/* If not expired, check if there is some new timeout
+			 * parameter from the partner state
+			 */
+			switch (port->sm_periodic_state) {
+			case AD_FAST_PERIODIC:
+				if (!(port->partner_oper.port_state
+				      & LACP_STATE_LACP_TIMEOUT))
+					port->sm_periodic_state = AD_SLOW_PERIODIC;
+				break;
+			case AD_SLOW_PERIODIC:
+				if ((port->partner_oper.port_state & LACP_STATE_LACP_TIMEOUT)) {
+					port->sm_periodic_timer_counter = 0;
+					port->sm_periodic_state = AD_PERIODIC_TX;
+				}
+				break;
+			default:
+				break;
+			}
+		}
+	} else {
+		switch (port->sm_periodic_state) {
+		case AD_NO_PERIODIC:
+			port->sm_periodic_state = AD_FAST_PERIODIC;
+			break;
+		case AD_PERIODIC_TX:
+			if (!(port->partner_oper.port_state &
+			    LACP_STATE_LACP_TIMEOUT))
+				port->sm_periodic_state = AD_SLOW_PERIODIC;
+			else
+				port->sm_periodic_state = AD_FAST_PERIODIC;
+			break;
+		default:
+			break;
+		}
+	}
+
+	/* check if the state machine was changed */
+	if (port->sm_periodic_state != last_state) {
+		slave_dbg(port->slave->bond->dev, port->slave->dev,
+			  "Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
+			  port->actor_port_number, last_state,
+			  port->sm_periodic_state);
+		switch (port->sm_periodic_state) {
+		case AD_NO_PERIODIC:
+			port->sm_periodic_timer_counter = 0;
+			break;
+		case AD_FAST_PERIODIC:
+			/* decrement 1 tick we lost in the PERIODIC_TX cycle */
+			port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
+			break;
+		case AD_SLOW_PERIODIC:
+			/* decrement 1 tick we lost in the PERIODIC_TX cycle */
+			port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
+			break;
+		case AD_PERIODIC_TX:
+			port->ntt = true;
+			break;
+		default:
+			break;
+		}
+	}
+}
+
+/**
+ * ad_port_selection_logic - select aggregation groups
+ * @port: the port we're looking at
+ * @update_slave_arr: Does slave array need update?
+ *
+ * Select aggregation groups, and assign each port for it's aggregetor. The
+ * selection logic is called in the inititalization (after all the handshkes),
+ * and after every lacpdu receive (if selected is off).
+ */
+static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
+{
+	struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
+	struct port *last_port = NULL, *curr_port;
+	struct list_head *iter;
+	struct bonding *bond;
+	struct slave *slave;
+	int found = 0;
+
+	/* if the port is already Selected, do nothing */
+	if (port->sm_vars & AD_PORT_SELECTED)
+		return;
+
+	bond = __get_bond_by_port(port);
+
+	/* if the port is connected to other aggregator, detach it */
+	if (port->aggregator) {
+		/* detach the port from its former aggregator */
+		temp_aggregator = port->aggregator;
+		for (curr_port = temp_aggregator->lag_ports; curr_port;
+		     last_port = curr_port,
+		     curr_port = curr_port->next_port_in_aggregator) {
+			if (curr_port == port) {
+				temp_aggregator->num_of_ports--;
+				/* if it is the first port attached to the
+				 * aggregator
+				 */
+				if (!last_port) {
+					temp_aggregator->lag_ports =
+						port->next_port_in_aggregator;
+				} else {
+					/* not the first port attached to the
+					 * aggregator
+					 */
+					last_port->next_port_in_aggregator =
+						port->next_port_in_aggregator;
+				}
+
+				/* clear the port's relations to this
+				 * aggregator
+				 */
+				port->aggregator = NULL;
+				port->next_port_in_aggregator = NULL;
+				port->actor_port_aggregator_identifier = 0;
+
+				slave_dbg(bond->dev, port->slave->dev, "Port %d left LAG %d\n",
+					  port->actor_port_number,
+					  temp_aggregator->aggregator_identifier);
+				/* if the aggregator is empty, clear its
+				 * parameters, and set it ready to be attached
+				 */
+				if (!temp_aggregator->lag_ports)
+					ad_clear_agg(temp_aggregator);
+				break;
+			}
+		}
+		if (!curr_port) {
+			/* meaning: the port was related to an aggregator
+			 * but was not on the aggregator port list
+			 */
+			net_warn_ratelimited("%s: (slave %s): Warning: Port %d was related to aggregator %d but was not on its port list\n",
+					     port->slave->bond->dev->name,
+					     port->slave->dev->name,
+					     port->actor_port_number,
+					     port->aggregator->aggregator_identifier);
+		}
+	}
+	/* search on all aggregators for a suitable aggregator for this port */
+	bond_for_each_slave(bond, slave, iter) {
+		aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
+
+		/* keep a free aggregator for later use(if needed) */
+		if (!aggregator->lag_ports) {
+			if (!free_aggregator)
+				free_aggregator = aggregator;
+			continue;
+		}
+		/* check if current aggregator suits us */
+		if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
+		     MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
+		     (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
+		     (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
+		    ) &&
+		    ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
+		      !aggregator->is_individual)  /* but is not individual OR */
+		    )
+		   ) {
+			/* attach to the founded aggregator */
+			port->aggregator = aggregator;
+			port->actor_port_aggregator_identifier =
+				port->aggregator->aggregator_identifier;
+			port->next_port_in_aggregator = aggregator->lag_ports;
+			port->aggregator->num_of_ports++;
+			aggregator->lag_ports = port;
+			slave_dbg(bond->dev, slave->dev, "Port %d joined LAG %d (existing LAG)\n",
+				  port->actor_port_number,
+				  port->aggregator->aggregator_identifier);
+
+			/* mark this port as selected */
+			port->sm_vars |= AD_PORT_SELECTED;
+			found = 1;
+			break;
+		}
+	}
+
+	/* the port couldn't find an aggregator - attach it to a new
+	 * aggregator
+	 */
+	if (!found) {
+		if (free_aggregator) {
+			/* assign port a new aggregator */
+			port->aggregator = free_aggregator;
+			port->actor_port_aggregator_identifier =
+				port->aggregator->aggregator_identifier;
+
+			/* update the new aggregator's parameters
+			 * if port was responsed from the end-user
+			 */
+			if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
+				/* if port is full duplex */
+				port->aggregator->is_individual = false;
+			else
+				port->aggregator->is_individual = true;
+
+			port->aggregator->actor_admin_aggregator_key =
+				port->actor_admin_port_key;
+			port->aggregator->actor_oper_aggregator_key =
+				port->actor_oper_port_key;
+			port->aggregator->partner_system =
+				port->partner_oper.system;
+			port->aggregator->partner_system_priority =
+				port->partner_oper.system_priority;
+			port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
+			port->aggregator->receive_state = 1;
+			port->aggregator->transmit_state = 1;
+			port->aggregator->lag_ports = port;
+			port->aggregator->num_of_ports++;
+
+			/* mark this port as selected */
+			port->sm_vars |= AD_PORT_SELECTED;
+
+			slave_dbg(bond->dev, port->slave->dev, "Port %d joined LAG %d (new LAG)\n",
+				  port->actor_port_number,
+				  port->aggregator->aggregator_identifier);
+		} else {
+			slave_err(bond->dev, port->slave->dev,
+				  "Port %d did not find a suitable aggregator\n",
+				  port->actor_port_number);
+			return;
+		}
+	}
+	/* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
+	 * in all aggregator's ports, else set ready=FALSE in all
+	 * aggregator's ports
+	 */
+	__set_agg_ports_ready(port->aggregator,
+			      __agg_ports_are_ready(port->aggregator));
+
+	aggregator = __get_first_agg(port);
+	ad_agg_selection_logic(aggregator, update_slave_arr);
+
+	if (!port->aggregator->is_active)
+		port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;
+}
+
+/* Decide if "agg" is a better choice for the new active aggregator that
+ * the current best, according to the ad_select policy.
+ */
+static struct aggregator *ad_agg_selection_test(struct aggregator *best,
+						struct aggregator *curr)
+{
+	/* 0. If no best, select current.
+	 *
+	 * 1. If the current agg is not individual, and the best is
+	 *    individual, select current.
+	 *
+	 * 2. If current agg is individual and the best is not, keep best.
+	 *
+	 * 3. Therefore, current and best are both individual or both not
+	 *    individual, so:
+	 *
+	 * 3a. If current agg partner replied, and best agg partner did not,
+	 *     select current.
+	 *
+	 * 3b. If current agg partner did not reply and best agg partner
+	 *     did reply, keep best.
+	 *
+	 * 4.  Therefore, current and best both have partner replies or
+	 *     both do not, so perform selection policy:
+	 *
+	 * BOND_AD_COUNT: Select by count of ports.  If count is equal,
+	 *     select by bandwidth.
+	 *
+	 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
+	 */
+	if (!best)
+		return curr;
+
+	if (!curr->is_individual && best->is_individual)
+		return curr;
+
+	if (curr->is_individual && !best->is_individual)
+		return best;
+
+	if (__agg_has_partner(curr) && !__agg_has_partner(best))
+		return curr;
+
+	if (!__agg_has_partner(curr) && __agg_has_partner(best))
+		return best;
+
+	switch (__get_agg_selection_mode(curr->lag_ports)) {
+	case BOND_AD_COUNT:
+		if (__agg_active_ports(curr) > __agg_active_ports(best))
+			return curr;
+
+		if (__agg_active_ports(curr) < __agg_active_ports(best))
+			return best;
+
+		fallthrough;
+	case BOND_AD_STABLE:
+	case BOND_AD_BANDWIDTH:
+		if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
+			return curr;
+
+		break;
+
+	default:
+		net_warn_ratelimited("%s: (slave %s): Impossible agg select mode %d\n",
+				     curr->slave->bond->dev->name,
+				     curr->slave->dev->name,
+				     __get_agg_selection_mode(curr->lag_ports));
+		break;
+	}
+
+	return best;
+}
+
+static int agg_device_up(const struct aggregator *agg)
+{
+	struct port *port = agg->lag_ports;
+
+	if (!port)
+		return 0;
+
+	for (port = agg->lag_ports; port;
+	     port = port->next_port_in_aggregator) {
+		if (netif_running(port->slave->dev) &&
+		    netif_carrier_ok(port->slave->dev))
+			return 1;
+	}
+
+	return 0;
+}
+
+/**
+ * ad_agg_selection_logic - select an aggregation group for a team
+ * @agg: the aggregator we're looking at
+ * @update_slave_arr: Does slave array need update?
+ *
+ * It is assumed that only one aggregator may be selected for a team.
+ *
+ * The logic of this function is to select the aggregator according to
+ * the ad_select policy:
+ *
+ * BOND_AD_STABLE: select the aggregator with the most ports attached to
+ * it, and to reselect the active aggregator only if the previous
+ * aggregator has no more ports related to it.
+ *
+ * BOND_AD_BANDWIDTH: select the aggregator with the highest total
+ * bandwidth, and reselect whenever a link state change takes place or the
+ * set of slaves in the bond changes.
+ *
+ * BOND_AD_COUNT: select the aggregator with largest number of ports
+ * (slaves), and reselect whenever a link state change takes place or the
+ * set of slaves in the bond changes.
+ *
+ * FIXME: this function MUST be called with the first agg in the bond, or
+ * __get_active_agg() won't work correctly. This function should be better
+ * called with the bond itself, and retrieve the first agg from it.
+ */
+static void ad_agg_selection_logic(struct aggregator *agg,
+				   bool *update_slave_arr)
+{
+	struct aggregator *best, *active, *origin;
+	struct bonding *bond = agg->slave->bond;
+	struct list_head *iter;
+	struct slave *slave;
+	struct port *port;
+
+	rcu_read_lock();
+	origin = agg;
+	active = __get_active_agg(agg);
+	best = (active && agg_device_up(active)) ? active : NULL;
+
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		agg = &(SLAVE_AD_INFO(slave)->aggregator);
+
+		agg->is_active = 0;
+
+		if (__agg_active_ports(agg) && agg_device_up(agg))
+			best = ad_agg_selection_test(best, agg);
+	}
+
+	if (best &&
+	    __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
+		/* For the STABLE policy, don't replace the old active
+		 * aggregator if it's still active (it has an answering
+		 * partner) or if both the best and active don't have an
+		 * answering partner.
+		 */
+		if (active && active->lag_ports &&
+		    __agg_active_ports(active) &&
+		    (__agg_has_partner(active) ||
+		     (!__agg_has_partner(active) &&
+		     !__agg_has_partner(best)))) {
+			if (!(!active->actor_oper_aggregator_key &&
+			      best->actor_oper_aggregator_key)) {
+				best = NULL;
+				active->is_active = 1;
+			}
+		}
+	}
+
+	if (best && (best == active)) {
+		best = NULL;
+		active->is_active = 1;
+	}
+
+	/* if there is new best aggregator, activate it */
+	if (best) {
+		netdev_dbg(bond->dev, "(slave %s): best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
+			   best->slave ? best->slave->dev->name : "NULL",
+			   best->aggregator_identifier, best->num_of_ports,
+			   best->actor_oper_aggregator_key,
+			   best->partner_oper_aggregator_key,
+			   best->is_individual, best->is_active);
+		netdev_dbg(bond->dev, "(slave %s): best ports %p slave %p\n",
+			   best->slave ? best->slave->dev->name : "NULL",
+			   best->lag_ports, best->slave);
+
+		bond_for_each_slave_rcu(bond, slave, iter) {
+			agg = &(SLAVE_AD_INFO(slave)->aggregator);
+
+			slave_dbg(bond->dev, slave->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
+				  agg->aggregator_identifier, agg->num_of_ports,
+				  agg->actor_oper_aggregator_key,
+				  agg->partner_oper_aggregator_key,
+				  agg->is_individual, agg->is_active);
+		}
+
+		/* check if any partner replies */
+		if (best->is_individual)
+			net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
+					     bond->dev->name);
+
+		best->is_active = 1;
+		netdev_dbg(bond->dev, "(slave %s): LAG %d chosen as the active LAG\n",
+			   best->slave ? best->slave->dev->name : "NULL",
+			   best->aggregator_identifier);
+		netdev_dbg(bond->dev, "(slave %s): Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
+			   best->slave ? best->slave->dev->name : "NULL",
+			   best->aggregator_identifier, best->num_of_ports,
+			   best->actor_oper_aggregator_key,
+			   best->partner_oper_aggregator_key,
+			   best->is_individual, best->is_active);
+
+		/* disable the ports that were related to the former
+		 * active_aggregator
+		 */
+		if (active) {
+			for (port = active->lag_ports; port;
+			     port = port->next_port_in_aggregator) {
+				__disable_port(port);
+			}
+		}
+		/* Slave array needs update. */
+		*update_slave_arr = true;
+	}
+
+	/* if the selected aggregator is of join individuals
+	 * (partner_system is NULL), enable their ports
+	 */
+	active = __get_active_agg(origin);
+
+	if (active) {
+		if (!__agg_has_partner(active)) {
+			for (port = active->lag_ports; port;
+			     port = port->next_port_in_aggregator) {
+				__enable_port(port);
+			}
+			*update_slave_arr = true;
+		}
+	}
+
+	rcu_read_unlock();
+
+	bond_3ad_set_carrier(bond);
+}
+
+/**
+ * ad_clear_agg - clear a given aggregator's parameters
+ * @aggregator: the aggregator we're looking at
+ */
+static void ad_clear_agg(struct aggregator *aggregator)
+{
+	if (aggregator) {
+		aggregator->is_individual = false;
+		aggregator->actor_admin_aggregator_key = 0;
+		aggregator->actor_oper_aggregator_key = 0;
+		eth_zero_addr(aggregator->partner_system.mac_addr_value);
+		aggregator->partner_system_priority = 0;
+		aggregator->partner_oper_aggregator_key = 0;
+		aggregator->receive_state = 0;
+		aggregator->transmit_state = 0;
+		aggregator->lag_ports = NULL;
+		aggregator->is_active = 0;
+		aggregator->num_of_ports = 0;
+		pr_debug("%s: LAG %d was cleared\n",
+			 aggregator->slave ?
+			 aggregator->slave->dev->name : "NULL",
+			 aggregator->aggregator_identifier);
+	}
+}
+
+/**
+ * ad_initialize_agg - initialize a given aggregator's parameters
+ * @aggregator: the aggregator we're looking at
+ */
+static void ad_initialize_agg(struct aggregator *aggregator)
+{
+	if (aggregator) {
+		ad_clear_agg(aggregator);
+
+		eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value);
+		aggregator->aggregator_identifier = 0;
+		aggregator->slave = NULL;
+	}
+}
+
+/**
+ * ad_initialize_port - initialize a given port's parameters
+ * @port: the port we're looking at
+ * @lacp_fast: boolean. whether fast periodic should be used
+ */
+static void ad_initialize_port(struct port *port, int lacp_fast)
+{
+	static const struct port_params tmpl = {
+		.system_priority = 0xffff,
+		.key             = 1,
+		.port_number     = 1,
+		.port_priority   = 0xff,
+		.port_state      = 1,
+	};
+	static const struct lacpdu lacpdu = {
+		.subtype		= 0x01,
+		.version_number = 0x01,
+		.tlv_type_actor_info = 0x01,
+		.actor_information_length = 0x14,
+		.tlv_type_partner_info = 0x02,
+		.partner_information_length = 0x14,
+		.tlv_type_collector_info = 0x03,
+		.collector_information_length = 0x10,
+		.collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
+	};
+
+	if (port) {
+		port->actor_port_priority = 0xff;
+		port->actor_port_aggregator_identifier = 0;
+		port->ntt = false;
+		port->actor_admin_port_state = LACP_STATE_AGGREGATION |
+					       LACP_STATE_LACP_ACTIVITY;
+		port->actor_oper_port_state  = LACP_STATE_AGGREGATION |
+					       LACP_STATE_LACP_ACTIVITY;
+
+		if (lacp_fast)
+			port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT;
+
+		memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
+		memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
+
+		port->is_enabled = true;
+		/* private parameters */
+		port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;
+		port->sm_rx_state = 0;
+		port->sm_rx_timer_counter = 0;
+		port->sm_periodic_state = 0;
+		port->sm_periodic_timer_counter = 0;
+		port->sm_mux_state = 0;
+		port->sm_mux_timer_counter = 0;
+		port->sm_tx_state = 0;
+		port->aggregator = NULL;
+		port->next_port_in_aggregator = NULL;
+		port->transaction_id = 0;
+
+		port->sm_churn_actor_timer_counter = 0;
+		port->sm_churn_actor_state = 0;
+		port->churn_actor_count = 0;
+		port->sm_churn_partner_timer_counter = 0;
+		port->sm_churn_partner_state = 0;
+		port->churn_partner_count = 0;
+
+		memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
+	}
+}
+
+/**
+ * ad_enable_collecting_distributing - enable a port's transmit/receive
+ * @port: the port we're looking at
+ * @update_slave_arr: Does slave array need update?
+ *
+ * Enable @port if it's in an active aggregator
+ */
+static void ad_enable_collecting_distributing(struct port *port,
+					      bool *update_slave_arr)
+{
+	if (port->aggregator->is_active) {
+		slave_dbg(port->slave->bond->dev, port->slave->dev,
+			  "Enabling port %d (LAG %d)\n",
+			  port->actor_port_number,
+			  port->aggregator->aggregator_identifier);
+		__enable_port(port);
+		/* Slave array needs update */
+		*update_slave_arr = true;
+	}
+}
+
+/**
+ * ad_disable_collecting_distributing - disable a port's transmit/receive
+ * @port: the port we're looking at
+ * @update_slave_arr: Does slave array need update?
+ */
+static void ad_disable_collecting_distributing(struct port *port,
+					       bool *update_slave_arr)
+{
+	if (port->aggregator &&
+	    !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
+			       &(null_mac_addr))) {
+		slave_dbg(port->slave->bond->dev, port->slave->dev,
+			  "Disabling port %d (LAG %d)\n",
+			  port->actor_port_number,
+			  port->aggregator->aggregator_identifier);
+		__disable_port(port);
+		/* Slave array needs an update */
+		*update_slave_arr = true;
+	}
+}
+
+/**
+ * ad_marker_info_received - handle receive of a Marker information frame
+ * @marker_info: Marker info received
+ * @port: the port we're looking at
+ */
+static void ad_marker_info_received(struct bond_marker *marker_info,
+				    struct port *port)
+{
+	struct bond_marker marker;
+
+	atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_rx);
+	atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_rx);
+
+	/* copy the received marker data to the response marker */
+	memcpy(&marker, marker_info, sizeof(struct bond_marker));
+	/* change the marker subtype to marker response */
+	marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
+
+	/* send the marker response */
+	if (ad_marker_send(port, &marker) >= 0)
+		slave_dbg(port->slave->bond->dev, port->slave->dev,
+			  "Sent Marker Response on port %d\n",
+			  port->actor_port_number);
+}
+
+/**
+ * ad_marker_response_received - handle receive of a marker response frame
+ * @marker: marker PDU received
+ * @port: the port we're looking at
+ *
+ * This function does nothing since we decided not to implement send and handle
+ * response for marker PDU's, in this stage, but only to respond to marker
+ * information.
+ */
+static void ad_marker_response_received(struct bond_marker *marker,
+					struct port *port)
+{
+	atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_resp_rx);
+	atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_resp_rx);
+
+	/* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
+}
+
+/* ========= AD exported functions to the main bonding code ========= */
+
+/* Check aggregators status in team every T seconds */
+#define AD_AGGREGATOR_SELECTION_TIMER  8
+
+/**
+ * bond_3ad_initiate_agg_selection - initate aggregator selection
+ * @bond: bonding struct
+ * @timeout: timeout value to set
+ *
+ * Set the aggregation selection timer, to initiate an agg selection in
+ * the very near future.  Called during first initialization, and during
+ * any down to up transitions of the bond.
+ */
+void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
+{
+	atomic_set(&BOND_AD_INFO(bond).agg_select_timer, timeout);
+}
+
+/**
+ * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
+ * @bond: bonding struct to work on
+ *
+ * Can be called only after the mac address of the bond is set.
+ */
+void bond_3ad_initialize(struct bonding *bond)
+{
+	BOND_AD_INFO(bond).aggregator_identifier = 0;
+	BOND_AD_INFO(bond).system.sys_priority =
+		bond->params.ad_actor_sys_prio;
+	if (is_zero_ether_addr(bond->params.ad_actor_system))
+		BOND_AD_INFO(bond).system.sys_mac_addr =
+		    *((struct mac_addr *)bond->dev->dev_addr);
+	else
+		BOND_AD_INFO(bond).system.sys_mac_addr =
+		    *((struct mac_addr *)bond->params.ad_actor_system);
+
+	bond_3ad_initiate_agg_selection(bond,
+					AD_AGGREGATOR_SELECTION_TIMER *
+					ad_ticks_per_sec);
+}
+
+/**
+ * bond_3ad_bind_slave - initialize a slave's port
+ * @slave: slave struct to work on
+ *
+ * Returns:   0 on success
+ *          < 0 on error
+ */
+void bond_3ad_bind_slave(struct slave *slave)
+{
+	struct bonding *bond = bond_get_bond_by_slave(slave);
+	struct port *port;
+	struct aggregator *aggregator;
+
+	/* check that the slave has not been initialized yet. */
+	if (SLAVE_AD_INFO(slave)->port.slave != slave) {
+
+		/* port initialization */
+		port = &(SLAVE_AD_INFO(slave)->port);
+
+		ad_initialize_port(port, bond->params.lacp_fast);
+
+		port->slave = slave;
+		port->actor_port_number = SLAVE_AD_INFO(slave)->id;
+		/* key is determined according to the link speed, duplex and
+		 * user key
+		 */
+		port->actor_admin_port_key = bond->params.ad_user_port_key << 6;
+		ad_update_actor_keys(port, false);
+		/* actor system is the bond's system */
+		__ad_actor_update_port(port);
+		/* tx timer(to verify that no more than MAX_TX_IN_SECOND
+		 * lacpdu's are sent in one second)
+		 */
+		port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
+
+		__disable_port(port);
+
+		/* aggregator initialization */
+		aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
+
+		ad_initialize_agg(aggregator);
+
+		aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
+		aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
+		aggregator->slave = slave;
+		aggregator->is_active = 0;
+		aggregator->num_of_ports = 0;
+	}
+}
+
+/**
+ * bond_3ad_unbind_slave - deinitialize a slave's port
+ * @slave: slave struct to work on
+ *
+ * Search for the aggregator that is related to this port, remove the
+ * aggregator and assign another aggregator for other port related to it
+ * (if any), and remove the port.
+ */
+void bond_3ad_unbind_slave(struct slave *slave)
+{
+	struct port *port, *prev_port, *temp_port;
+	struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
+	int select_new_active_agg = 0;
+	struct bonding *bond = slave->bond;
+	struct slave *slave_iter;
+	struct list_head *iter;
+	bool dummy_slave_update; /* Ignore this value as caller updates array */
+
+	/* Sync against bond_3ad_state_machine_handler() */
+	spin_lock_bh(&bond->mode_lock);
+	aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
+	port = &(SLAVE_AD_INFO(slave)->port);
+
+	/* if slave is null, the whole port is not initialized */
+	if (!port->slave) {
+		slave_warn(bond->dev, slave->dev, "Trying to unbind an uninitialized port\n");
+		goto out;
+	}
+
+	slave_dbg(bond->dev, slave->dev, "Unbinding Link Aggregation Group %d\n",
+		  aggregator->aggregator_identifier);
+
+	/* Tell the partner that this port is not suitable for aggregation */
+	port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;
+	port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;
+	port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;
+	port->actor_oper_port_state &= ~LACP_STATE_AGGREGATION;
+	__update_lacpdu_from_port(port);
+	ad_lacpdu_send(port);
+
+	/* check if this aggregator is occupied */
+	if (aggregator->lag_ports) {
+		/* check if there are other ports related to this aggregator
+		 * except the port related to this slave(thats ensure us that
+		 * there is a reason to search for new aggregator, and that we
+		 * will find one
+		 */
+		if ((aggregator->lag_ports != port) ||
+		    (aggregator->lag_ports->next_port_in_aggregator)) {
+			/* find new aggregator for the related port(s) */
+			bond_for_each_slave(bond, slave_iter, iter) {
+				new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
+				/* if the new aggregator is empty, or it is
+				 * connected to our port only
+				 */
+				if (!new_aggregator->lag_ports ||
+				    ((new_aggregator->lag_ports == port) &&
+				     !new_aggregator->lag_ports->next_port_in_aggregator))
+					break;
+			}
+			if (!slave_iter)
+				new_aggregator = NULL;
+
+			/* if new aggregator found, copy the aggregator's
+			 * parameters and connect the related lag_ports to the
+			 * new aggregator
+			 */
+			if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
+				slave_dbg(bond->dev, slave->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
+					  aggregator->aggregator_identifier,
+					  new_aggregator->aggregator_identifier);
+
+				if ((new_aggregator->lag_ports == port) &&
+				    new_aggregator->is_active) {
+					slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
+					select_new_active_agg = 1;
+				}
+
+				new_aggregator->is_individual = aggregator->is_individual;
+				new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
+				new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
+				new_aggregator->partner_system = aggregator->partner_system;
+				new_aggregator->partner_system_priority = aggregator->partner_system_priority;
+				new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
+				new_aggregator->receive_state = aggregator->receive_state;
+				new_aggregator->transmit_state = aggregator->transmit_state;
+				new_aggregator->lag_ports = aggregator->lag_ports;
+				new_aggregator->is_active = aggregator->is_active;
+				new_aggregator->num_of_ports = aggregator->num_of_ports;
+
+				/* update the information that is written on
+				 * the ports about the aggregator
+				 */
+				for (temp_port = aggregator->lag_ports; temp_port;
+				     temp_port = temp_port->next_port_in_aggregator) {
+					temp_port->aggregator = new_aggregator;
+					temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
+				}
+
+				ad_clear_agg(aggregator);
+
+				if (select_new_active_agg)
+					ad_agg_selection_logic(__get_first_agg(port),
+							       &dummy_slave_update);
+			} else {
+				slave_warn(bond->dev, slave->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
+			}
+		} else {
+			/* in case that the only port related to this
+			 * aggregator is the one we want to remove
+			 */
+			select_new_active_agg = aggregator->is_active;
+			ad_clear_agg(aggregator);
+			if (select_new_active_agg) {
+				slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
+				/* select new active aggregator */
+				temp_aggregator = __get_first_agg(port);
+				if (temp_aggregator)
+					ad_agg_selection_logic(temp_aggregator,
+							       &dummy_slave_update);
+			}
+		}
+	}
+
+	slave_dbg(bond->dev, slave->dev, "Unbinding port %d\n", port->actor_port_number);
+
+	/* find the aggregator that this port is connected to */
+	bond_for_each_slave(bond, slave_iter, iter) {
+		temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
+		prev_port = NULL;
+		/* search the port in the aggregator's related ports */
+		for (temp_port = temp_aggregator->lag_ports; temp_port;
+		     prev_port = temp_port,
+		     temp_port = temp_port->next_port_in_aggregator) {
+			if (temp_port == port) {
+				/* the aggregator found - detach the port from
+				 * this aggregator
+				 */
+				if (prev_port)
+					prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
+				else
+					temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
+				temp_aggregator->num_of_ports--;
+				if (__agg_active_ports(temp_aggregator) == 0) {
+					select_new_active_agg = temp_aggregator->is_active;
+					if (temp_aggregator->num_of_ports == 0)
+						ad_clear_agg(temp_aggregator);
+					if (select_new_active_agg) {
+						slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
+						/* select new active aggregator */
+						ad_agg_selection_logic(__get_first_agg(port),
+							               &dummy_slave_update);
+					}
+				}
+				break;
+			}
+		}
+	}
+	port->slave = NULL;
+
+out:
+	spin_unlock_bh(&bond->mode_lock);
+}
+
+/**
+ * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports
+ * @bond: bonding struct to work on
+ *
+ * If an ad_actor setting gets changed we need to update the individual port
+ * settings so the bond device will use the new values when it gets upped.
+ */
+void bond_3ad_update_ad_actor_settings(struct bonding *bond)
+{
+	struct list_head *iter;
+	struct slave *slave;
+
+	ASSERT_RTNL();
+
+	BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio;
+	if (is_zero_ether_addr(bond->params.ad_actor_system))
+		BOND_AD_INFO(bond).system.sys_mac_addr =
+		    *((struct mac_addr *)bond->dev->dev_addr);
+	else
+		BOND_AD_INFO(bond).system.sys_mac_addr =
+		    *((struct mac_addr *)bond->params.ad_actor_system);
+
+	spin_lock_bh(&bond->mode_lock);
+	bond_for_each_slave(bond, slave, iter) {
+		struct port *port = &(SLAVE_AD_INFO(slave))->port;
+
+		__ad_actor_update_port(port);
+		port->ntt = true;
+	}
+	spin_unlock_bh(&bond->mode_lock);
+}
+
+/**
+ * bond_agg_timer_advance - advance agg_select_timer
+ * @bond:  bonding structure
+ *
+ * Return true when agg_select_timer reaches 0.
+ */
+static bool bond_agg_timer_advance(struct bonding *bond)
+{
+	int val, nval;
+
+	while (1) {
+		val = atomic_read(&BOND_AD_INFO(bond).agg_select_timer);
+		if (!val)
+			return false;
+		nval = val - 1;
+		if (atomic_cmpxchg(&BOND_AD_INFO(bond).agg_select_timer,
+				   val, nval) == val)
+			break;
+	}
+	return nval == 0;
+}
+
+/**
+ * bond_3ad_state_machine_handler - handle state machines timeout
+ * @work: work context to fetch bonding struct to work on from
+ *
+ * The state machine handling concept in this module is to check every tick
+ * which state machine should operate any function. The execution order is
+ * round robin, so when we have an interaction between state machines, the
+ * reply of one to each other might be delayed until next tick.
+ *
+ * This function also complete the initialization when the agg_select_timer
+ * times out, and it selects an aggregator for the ports that are yet not
+ * related to any aggregator, and selects the active aggregator for a bond.
+ */
+void bond_3ad_state_machine_handler(struct work_struct *work)
+{
+	struct bonding *bond = container_of(work, struct bonding,
+					    ad_work.work);
+	struct aggregator *aggregator;
+	struct list_head *iter;
+	struct slave *slave;
+	struct port *port;
+	bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
+	bool update_slave_arr = false;
+
+	/* Lock to protect data accessed by all (e.g., port->sm_vars) and
+	 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
+	 * concurrently due to incoming LACPDU as well.
+	 */
+	spin_lock_bh(&bond->mode_lock);
+	rcu_read_lock();
+
+	/* check if there are any slaves */
+	if (!bond_has_slaves(bond))
+		goto re_arm;
+
+	if (bond_agg_timer_advance(bond)) {
+		slave = bond_first_slave_rcu(bond);
+		port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
+
+		/* select the active aggregator for the bond */
+		if (port) {
+			if (!port->slave) {
+				net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
+						     bond->dev->name);
+				goto re_arm;
+			}
+
+			aggregator = __get_first_agg(port);
+			ad_agg_selection_logic(aggregator, &update_slave_arr);
+		}
+		bond_3ad_set_carrier(bond);
+	}
+
+	/* for each port run the state machines */
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		port = &(SLAVE_AD_INFO(slave)->port);
+		if (!port->slave) {
+			net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
+					    bond->dev->name);
+			goto re_arm;
+		}
+
+		ad_rx_machine(NULL, port);
+		ad_periodic_machine(port, &bond->params);
+		ad_port_selection_logic(port, &update_slave_arr);
+		ad_mux_machine(port, &update_slave_arr);
+		ad_tx_machine(port);
+		ad_churn_machine(port);
+
+		/* turn off the BEGIN bit, since we already handled it */
+		if (port->sm_vars & AD_PORT_BEGIN)
+			port->sm_vars &= ~AD_PORT_BEGIN;
+	}
+
+re_arm:
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		if (slave->should_notify) {
+			should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
+			break;
+		}
+	}
+	rcu_read_unlock();
+	spin_unlock_bh(&bond->mode_lock);
+
+	if (update_slave_arr)
+		bond_slave_arr_work_rearm(bond, 0);
+
+	if (should_notify_rtnl && rtnl_trylock()) {
+		bond_slave_state_notify(bond);
+		rtnl_unlock();
+	}
+	queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
+}
+
+/**
+ * bond_3ad_rx_indication - handle a received frame
+ * @lacpdu: received lacpdu
+ * @slave: slave struct to work on
+ *
+ * It is assumed that frames that were sent on this NIC don't returned as new
+ * received frames (loopback). Since only the payload is given to this
+ * function, it check for loopback.
+ */
+static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave)
+{
+	struct bonding *bond = slave->bond;
+	int ret = RX_HANDLER_ANOTHER;
+	struct bond_marker *marker;
+	struct port *port;
+	atomic64_t *stat;
+
+	port = &(SLAVE_AD_INFO(slave)->port);
+	if (!port->slave) {
+		net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
+				     slave->dev->name, slave->bond->dev->name);
+		return ret;
+	}
+
+	switch (lacpdu->subtype) {
+	case AD_TYPE_LACPDU:
+		ret = RX_HANDLER_CONSUMED;
+		slave_dbg(slave->bond->dev, slave->dev,
+			  "Received LACPDU on port %d\n",
+			  port->actor_port_number);
+		/* Protect against concurrent state machines */
+		spin_lock(&slave->bond->mode_lock);
+		ad_rx_machine(lacpdu, port);
+		spin_unlock(&slave->bond->mode_lock);
+		break;
+	case AD_TYPE_MARKER:
+		ret = RX_HANDLER_CONSUMED;
+		/* No need to convert fields to Little Endian since we
+		 * don't use the marker's fields.
+		 */
+		marker = (struct bond_marker *)lacpdu;
+		switch (marker->tlv_type) {
+		case AD_MARKER_INFORMATION_SUBTYPE:
+			slave_dbg(slave->bond->dev, slave->dev, "Received Marker Information on port %d\n",
+				  port->actor_port_number);
+			ad_marker_info_received(marker, port);
+			break;
+		case AD_MARKER_RESPONSE_SUBTYPE:
+			slave_dbg(slave->bond->dev, slave->dev, "Received Marker Response on port %d\n",
+				  port->actor_port_number);
+			ad_marker_response_received(marker, port);
+			break;
+		default:
+			slave_dbg(slave->bond->dev, slave->dev, "Received an unknown Marker subtype on port %d\n",
+				  port->actor_port_number);
+			stat = &SLAVE_AD_INFO(slave)->stats.marker_unknown_rx;
+			atomic64_inc(stat);
+			stat = &BOND_AD_INFO(bond).stats.marker_unknown_rx;
+			atomic64_inc(stat);
+		}
+		break;
+	default:
+		atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_unknown_rx);
+		atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_unknown_rx);
+	}
+
+	return ret;
+}
+
+/**
+ * ad_update_actor_keys - Update the oper / admin keys for a port based on
+ * its current speed and duplex settings.
+ *
+ * @port: the port we'are looking at
+ * @reset: Boolean to just reset the speed and the duplex part of the key
+ *
+ * The logic to change the oper / admin keys is:
+ * (a) A full duplex port can participate in LACP with partner.
+ * (b) When the speed is changed, LACP need to be reinitiated.
+ */
+static void ad_update_actor_keys(struct port *port, bool reset)
+{
+	u8 duplex = 0;
+	u16 ospeed = 0, speed = 0;
+	u16 old_oper_key = port->actor_oper_port_key;
+
+	port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);
+	if (!reset) {
+		speed = __get_link_speed(port);
+		ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;
+		duplex = __get_duplex(port);
+		port->actor_admin_port_key |= (speed << 1) | duplex;
+	}
+	port->actor_oper_port_key = port->actor_admin_port_key;
+
+	if (old_oper_key != port->actor_oper_port_key) {
+		/* Only 'duplex' port participates in LACP */
+		if (duplex)
+			port->sm_vars |= AD_PORT_LACP_ENABLED;
+		else
+			port->sm_vars &= ~AD_PORT_LACP_ENABLED;
+
+		if (!reset) {
+			if (!speed) {
+				slave_err(port->slave->bond->dev,
+					  port->slave->dev,
+					  "speed changed to 0 on port %d\n",
+					  port->actor_port_number);
+			} else if (duplex && ospeed != speed) {
+				/* Speed change restarts LACP state-machine */
+				port->sm_vars |= AD_PORT_BEGIN;
+			}
+		}
+	}
+}
+
+/**
+ * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
+ * change indication
+ *
+ * @slave: slave struct to work on
+ *
+ * Handle reselection of aggregator (if needed) for this port.
+ */
+void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)
+{
+	struct port *port;
+
+	port = &(SLAVE_AD_INFO(slave)->port);
+
+	/* if slave is null, the whole port is not initialized */
+	if (!port->slave) {
+		slave_warn(slave->bond->dev, slave->dev,
+			   "speed/duplex changed for uninitialized port\n");
+		return;
+	}
+
+	spin_lock_bh(&slave->bond->mode_lock);
+	ad_update_actor_keys(port, false);
+	spin_unlock_bh(&slave->bond->mode_lock);
+	slave_dbg(slave->bond->dev, slave->dev, "Port %d changed speed/duplex\n",
+		  port->actor_port_number);
+}
+
+/**
+ * bond_3ad_handle_link_change - handle a slave's link status change indication
+ * @slave: slave struct to work on
+ * @link: whether the link is now up or down
+ *
+ * Handle reselection of aggregator (if needed) for this port.
+ */
+void bond_3ad_handle_link_change(struct slave *slave, char link)
+{
+	struct aggregator *agg;
+	struct port *port;
+	bool dummy;
+
+	port = &(SLAVE_AD_INFO(slave)->port);
+
+	/* if slave is null, the whole port is not initialized */
+	if (!port->slave) {
+		slave_warn(slave->bond->dev, slave->dev, "link status changed for uninitialized port\n");
+		return;
+	}
+
+	spin_lock_bh(&slave->bond->mode_lock);
+	/* on link down we are zeroing duplex and speed since
+	 * some of the adaptors(ce1000.lan) report full duplex/speed
+	 * instead of N/A(duplex) / 0(speed).
+	 *
+	 * on link up we are forcing recheck on the duplex and speed since
+	 * some of he adaptors(ce1000.lan) report.
+	 */
+	if (link == BOND_LINK_UP) {
+		port->is_enabled = true;
+		ad_update_actor_keys(port, false);
+	} else {
+		/* link has failed */
+		port->is_enabled = false;
+		ad_update_actor_keys(port, true);
+	}
+	agg = __get_first_agg(port);
+	ad_agg_selection_logic(agg, &dummy);
+
+	spin_unlock_bh(&slave->bond->mode_lock);
+
+	slave_dbg(slave->bond->dev, slave->dev, "Port %d changed link status to %s\n",
+		  port->actor_port_number,
+		  link == BOND_LINK_UP ? "UP" : "DOWN");
+
+	/* RTNL is held and mode_lock is released so it's safe
+	 * to update slave_array here.
+	 */
+	bond_update_slave_arr(slave->bond, NULL);
+}
+
+/**
+ * bond_3ad_set_carrier - set link state for bonding master
+ * @bond: bonding structure
+ *
+ * if we have an active aggregator, we're up, if not, we're down.
+ * Presumes that we cannot have an active aggregator if there are
+ * no slaves with link up.
+ *
+ * This behavior complies with IEEE 802.3 section 43.3.9.
+ *
+ * Called by bond_set_carrier(). Return zero if carrier state does not
+ * change, nonzero if it does.
+ */
+int bond_3ad_set_carrier(struct bonding *bond)
+{
+	struct aggregator *active;
+	struct slave *first_slave;
+	int ret = 1;
+
+	rcu_read_lock();
+	first_slave = bond_first_slave_rcu(bond);
+	if (!first_slave) {
+		ret = 0;
+		goto out;
+	}
+	active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
+	if (active) {
+		/* are enough slaves available to consider link up? */
+		if (__agg_active_ports(active) < bond->params.min_links) {
+			if (netif_carrier_ok(bond->dev)) {
+				netif_carrier_off(bond->dev);
+				goto out;
+			}
+		} else if (!netif_carrier_ok(bond->dev)) {
+			netif_carrier_on(bond->dev);
+			goto out;
+		}
+	} else if (netif_carrier_ok(bond->dev)) {
+		netif_carrier_off(bond->dev);
+	}
+out:
+	rcu_read_unlock();
+	return ret;
+}
+
+/**
+ * __bond_3ad_get_active_agg_info - get information of the active aggregator
+ * @bond: bonding struct to work on
+ * @ad_info: ad_info struct to fill with the bond's info
+ *
+ * Returns:   0 on success
+ *          < 0 on error
+ */
+int __bond_3ad_get_active_agg_info(struct bonding *bond,
+				   struct ad_info *ad_info)
+{
+	struct aggregator *aggregator = NULL;
+	struct list_head *iter;
+	struct slave *slave;
+	struct port *port;
+
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		port = &(SLAVE_AD_INFO(slave)->port);
+		if (port->aggregator && port->aggregator->is_active) {
+			aggregator = port->aggregator;
+			break;
+		}
+	}
+
+	if (!aggregator)
+		return -1;
+
+	ad_info->aggregator_id = aggregator->aggregator_identifier;
+	ad_info->ports = __agg_active_ports(aggregator);
+	ad_info->actor_key = aggregator->actor_oper_aggregator_key;
+	ad_info->partner_key = aggregator->partner_oper_aggregator_key;
+	ether_addr_copy(ad_info->partner_system,
+			aggregator->partner_system.mac_addr_value);
+	return 0;
+}
+
+int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
+{
+	int ret;
+
+	rcu_read_lock();
+	ret = __bond_3ad_get_active_agg_info(bond, ad_info);
+	rcu_read_unlock();
+
+	return ret;
+}
+
+int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
+			 struct slave *slave)
+{
+	struct lacpdu *lacpdu, _lacpdu;
+
+	if (skb->protocol != PKT_TYPE_LACPDU)
+		return RX_HANDLER_ANOTHER;
+
+	if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
+		return RX_HANDLER_ANOTHER;
+
+	lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
+	if (!lacpdu) {
+		atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_illegal_rx);
+		atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_illegal_rx);
+		return RX_HANDLER_ANOTHER;
+	}
+
+	return bond_3ad_rx_indication(lacpdu, slave);
+}
+
+/**
+ * bond_3ad_update_lacp_rate - change the lacp rate
+ * @bond: bonding struct
+ *
+ * When modify lacp_rate parameter via sysfs,
+ * update actor_oper_port_state of each port.
+ *
+ * Hold bond->mode_lock,
+ * so we can modify port->actor_oper_port_state,
+ * no matter bond is up or down.
+ */
+void bond_3ad_update_lacp_rate(struct bonding *bond)
+{
+	struct port *port = NULL;
+	struct list_head *iter;
+	struct slave *slave;
+	int lacp_fast;
+
+	lacp_fast = bond->params.lacp_fast;
+	spin_lock_bh(&bond->mode_lock);
+	bond_for_each_slave(bond, slave, iter) {
+		port = &(SLAVE_AD_INFO(slave)->port);
+		if (lacp_fast)
+			port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT;
+		else
+			port->actor_oper_port_state &= ~LACP_STATE_LACP_TIMEOUT;
+	}
+	spin_unlock_bh(&bond->mode_lock);
+}
+
+size_t bond_3ad_stats_size(void)
+{
+	return nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_RX */
+	       nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_TX */
+	       nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_UNKNOWN_RX */
+	       nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_ILLEGAL_RX */
+	       nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RX */
+	       nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_TX */
+	       nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_RX */
+	       nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_TX */
+	       nla_total_size_64bit(sizeof(u64)); /* BOND_3AD_STAT_MARKER_UNKNOWN_RX */
+}
+
+int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats)
+{
+	u64 val;
+
+	val = atomic64_read(&stats->lacpdu_rx);
+	if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_RX, val,
+			      BOND_3AD_STAT_PAD))
+		return -EMSGSIZE;
+	val = atomic64_read(&stats->lacpdu_tx);
+	if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_TX, val,
+			      BOND_3AD_STAT_PAD))
+		return -EMSGSIZE;
+	val = atomic64_read(&stats->lacpdu_unknown_rx);
+	if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_UNKNOWN_RX, val,
+			      BOND_3AD_STAT_PAD))
+		return -EMSGSIZE;
+	val = atomic64_read(&stats->lacpdu_illegal_rx);
+	if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_ILLEGAL_RX, val,
+			      BOND_3AD_STAT_PAD))
+		return -EMSGSIZE;
+
+	val = atomic64_read(&stats->marker_rx);
+	if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RX, val,
+			      BOND_3AD_STAT_PAD))
+		return -EMSGSIZE;
+	val = atomic64_read(&stats->marker_tx);
+	if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_TX, val,
+			      BOND_3AD_STAT_PAD))
+		return -EMSGSIZE;
+	val = atomic64_read(&stats->marker_resp_rx);
+	if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_RX, val,
+			      BOND_3AD_STAT_PAD))
+		return -EMSGSIZE;
+	val = atomic64_read(&stats->marker_resp_tx);
+	if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_TX, val,
+			      BOND_3AD_STAT_PAD))
+		return -EMSGSIZE;
+	val = atomic64_read(&stats->marker_unknown_rx);
+	if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_UNKNOWN_RX, val,
+			      BOND_3AD_STAT_PAD))
+		return -EMSGSIZE;
+
+	return 0;
+}
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
new file mode 100644
index 0000000000..dc2c7b9796
--- /dev/null
+++ b/drivers/net/bonding/bond_alb.c
@@ -0,0 +1,1836 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
+ */
+
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/pkt_sched.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/if_arp.h>
+#include <linux/if_ether.h>
+#include <linux/if_bonding.h>
+#include <linux/if_vlan.h>
+#include <linux/in.h>
+#include <net/arp.h>
+#include <net/ipv6.h>
+#include <net/ndisc.h>
+#include <asm/byteorder.h>
+#include <net/bonding.h>
+#include <net/bond_alb.h>
+
+static const u8 mac_v6_allmcast[ETH_ALEN + 2] __long_aligned = {
+	0x33, 0x33, 0x00, 0x00, 0x00, 0x01
+};
+static const int alb_delta_in_ticks = HZ / ALB_TIMER_TICKS_PER_SEC;
+
+#pragma pack(1)
+struct learning_pkt {
+	u8 mac_dst[ETH_ALEN];
+	u8 mac_src[ETH_ALEN];
+	__be16 type;
+	u8 padding[ETH_ZLEN - ETH_HLEN];
+};
+
+struct arp_pkt {
+	__be16  hw_addr_space;
+	__be16  prot_addr_space;
+	u8      hw_addr_len;
+	u8      prot_addr_len;
+	__be16  op_code;
+	u8      mac_src[ETH_ALEN];	/* sender hardware address */
+	__be32  ip_src;			/* sender IP address */
+	u8      mac_dst[ETH_ALEN];	/* target hardware address */
+	__be32  ip_dst;			/* target IP address */
+};
+#pragma pack()
+
+/* Forward declaration */
+static void alb_send_learning_packets(struct slave *slave, const u8 mac_addr[],
+				      bool strict_match);
+static void rlb_purge_src_ip(struct bonding *bond, struct arp_pkt *arp);
+static void rlb_src_unlink(struct bonding *bond, u32 index);
+static void rlb_src_link(struct bonding *bond, u32 ip_src_hash,
+			 u32 ip_dst_hash);
+
+static inline u8 _simple_hash(const u8 *hash_start, int hash_size)
+{
+	int i;
+	u8 hash = 0;
+
+	for (i = 0; i < hash_size; i++)
+		hash ^= hash_start[i];
+
+	return hash;
+}
+
+/*********************** tlb specific functions ***************************/
+
+static inline void tlb_init_table_entry(struct tlb_client_info *entry, int save_load)
+{
+	if (save_load) {
+		entry->load_history = 1 + entry->tx_bytes /
+				      BOND_TLB_REBALANCE_INTERVAL;
+		entry->tx_bytes = 0;
+	}
+
+	entry->tx_slave = NULL;
+	entry->next = TLB_NULL_INDEX;
+	entry->prev = TLB_NULL_INDEX;
+}
+
+static inline void tlb_init_slave(struct slave *slave)
+{
+	SLAVE_TLB_INFO(slave).load = 0;
+	SLAVE_TLB_INFO(slave).head = TLB_NULL_INDEX;
+}
+
+static void __tlb_clear_slave(struct bonding *bond, struct slave *slave,
+			 int save_load)
+{
+	struct tlb_client_info *tx_hash_table;
+	u32 index;
+
+	/* clear slave from tx_hashtbl */
+	tx_hash_table = BOND_ALB_INFO(bond).tx_hashtbl;
+
+	/* skip this if we've already freed the tx hash table */
+	if (tx_hash_table) {
+		index = SLAVE_TLB_INFO(slave).head;
+		while (index != TLB_NULL_INDEX) {
+			u32 next_index = tx_hash_table[index].next;
+
+			tlb_init_table_entry(&tx_hash_table[index], save_load);
+			index = next_index;
+		}
+	}
+
+	tlb_init_slave(slave);
+}
+
+static void tlb_clear_slave(struct bonding *bond, struct slave *slave,
+			 int save_load)
+{
+	spin_lock_bh(&bond->mode_lock);
+	__tlb_clear_slave(bond, slave, save_load);
+	spin_unlock_bh(&bond->mode_lock);
+}
+
+/* Must be called before starting the monitor timer */
+static int tlb_initialize(struct bonding *bond)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	int size = TLB_HASH_TABLE_SIZE * sizeof(struct tlb_client_info);
+	struct tlb_client_info *new_hashtbl;
+	int i;
+
+	new_hashtbl = kzalloc(size, GFP_KERNEL);
+	if (!new_hashtbl)
+		return -ENOMEM;
+
+	spin_lock_bh(&bond->mode_lock);
+
+	bond_info->tx_hashtbl = new_hashtbl;
+
+	for (i = 0; i < TLB_HASH_TABLE_SIZE; i++)
+		tlb_init_table_entry(&bond_info->tx_hashtbl[i], 0);
+
+	spin_unlock_bh(&bond->mode_lock);
+
+	return 0;
+}
+
+/* Must be called only after all slaves have been released */
+static void tlb_deinitialize(struct bonding *bond)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+
+	spin_lock_bh(&bond->mode_lock);
+
+	kfree(bond_info->tx_hashtbl);
+	bond_info->tx_hashtbl = NULL;
+
+	spin_unlock_bh(&bond->mode_lock);
+}
+
+static long long compute_gap(struct slave *slave)
+{
+	return (s64) (slave->speed << 20) - /* Convert to Megabit per sec */
+	       (s64) (SLAVE_TLB_INFO(slave).load << 3); /* Bytes to bits */
+}
+
+static struct slave *tlb_get_least_loaded_slave(struct bonding *bond)
+{
+	struct slave *slave, *least_loaded;
+	struct list_head *iter;
+	long long max_gap;
+
+	least_loaded = NULL;
+	max_gap = LLONG_MIN;
+
+	/* Find the slave with the largest gap */
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		if (bond_slave_can_tx(slave)) {
+			long long gap = compute_gap(slave);
+
+			if (max_gap < gap) {
+				least_loaded = slave;
+				max_gap = gap;
+			}
+		}
+	}
+
+	return least_loaded;
+}
+
+static struct slave *__tlb_choose_channel(struct bonding *bond, u32 hash_index,
+						u32 skb_len)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	struct tlb_client_info *hash_table;
+	struct slave *assigned_slave;
+
+	hash_table = bond_info->tx_hashtbl;
+	assigned_slave = hash_table[hash_index].tx_slave;
+	if (!assigned_slave) {
+		assigned_slave = tlb_get_least_loaded_slave(bond);
+
+		if (assigned_slave) {
+			struct tlb_slave_info *slave_info =
+				&(SLAVE_TLB_INFO(assigned_slave));
+			u32 next_index = slave_info->head;
+
+			hash_table[hash_index].tx_slave = assigned_slave;
+			hash_table[hash_index].next = next_index;
+			hash_table[hash_index].prev = TLB_NULL_INDEX;
+
+			if (next_index != TLB_NULL_INDEX)
+				hash_table[next_index].prev = hash_index;
+
+			slave_info->head = hash_index;
+			slave_info->load +=
+				hash_table[hash_index].load_history;
+		}
+	}
+
+	if (assigned_slave)
+		hash_table[hash_index].tx_bytes += skb_len;
+
+	return assigned_slave;
+}
+
+static struct slave *tlb_choose_channel(struct bonding *bond, u32 hash_index,
+					u32 skb_len)
+{
+	struct slave *tx_slave;
+
+	/* We don't need to disable softirq here, because
+	 * tlb_choose_channel() is only called by bond_alb_xmit()
+	 * which already has softirq disabled.
+	 */
+	spin_lock(&bond->mode_lock);
+	tx_slave = __tlb_choose_channel(bond, hash_index, skb_len);
+	spin_unlock(&bond->mode_lock);
+
+	return tx_slave;
+}
+
+/*********************** rlb specific functions ***************************/
+
+/* when an ARP REPLY is received from a client update its info
+ * in the rx_hashtbl
+ */
+static void rlb_update_entry_from_arp(struct bonding *bond, struct arp_pkt *arp)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	struct rlb_client_info *client_info;
+	u32 hash_index;
+
+	spin_lock_bh(&bond->mode_lock);
+
+	hash_index = _simple_hash((u8 *)&(arp->ip_src), sizeof(arp->ip_src));
+	client_info = &(bond_info->rx_hashtbl[hash_index]);
+
+	if ((client_info->assigned) &&
+	    (client_info->ip_src == arp->ip_dst) &&
+	    (client_info->ip_dst == arp->ip_src) &&
+	    (!ether_addr_equal_64bits(client_info->mac_dst, arp->mac_src))) {
+		/* update the clients MAC address */
+		ether_addr_copy(client_info->mac_dst, arp->mac_src);
+		client_info->ntt = 1;
+		bond_info->rx_ntt = 1;
+	}
+
+	spin_unlock_bh(&bond->mode_lock);
+}
+
+static int rlb_arp_recv(const struct sk_buff *skb, struct bonding *bond,
+			struct slave *slave)
+{
+	struct arp_pkt *arp, _arp;
+
+	if (skb->protocol != cpu_to_be16(ETH_P_ARP))
+		goto out;
+
+	arp = skb_header_pointer(skb, 0, sizeof(_arp), &_arp);
+	if (!arp)
+		goto out;
+
+	/* We received an ARP from arp->ip_src.
+	 * We might have used this IP address previously (on the bonding host
+	 * itself or on a system that is bridged together with the bond).
+	 * However, if arp->mac_src is different than what is stored in
+	 * rx_hashtbl, some other host is now using the IP and we must prevent
+	 * sending out client updates with this IP address and the old MAC
+	 * address.
+	 * Clean up all hash table entries that have this address as ip_src but
+	 * have a different mac_src.
+	 */
+	rlb_purge_src_ip(bond, arp);
+
+	if (arp->op_code == htons(ARPOP_REPLY)) {
+		/* update rx hash table for this ARP */
+		rlb_update_entry_from_arp(bond, arp);
+		slave_dbg(bond->dev, slave->dev, "Server received an ARP Reply from client\n");
+	}
+out:
+	return RX_HANDLER_ANOTHER;
+}
+
+/* Caller must hold rcu_read_lock() */
+static struct slave *__rlb_next_rx_slave(struct bonding *bond)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	struct slave *before = NULL, *rx_slave = NULL, *slave;
+	struct list_head *iter;
+	bool found = false;
+
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		if (!bond_slave_can_tx(slave))
+			continue;
+		if (!found) {
+			if (!before || before->speed < slave->speed)
+				before = slave;
+		} else {
+			if (!rx_slave || rx_slave->speed < slave->speed)
+				rx_slave = slave;
+		}
+		if (slave == bond_info->rx_slave)
+			found = true;
+	}
+	/* we didn't find anything after the current or we have something
+	 * better before and up to the current slave
+	 */
+	if (!rx_slave || (before && rx_slave->speed < before->speed))
+		rx_slave = before;
+
+	if (rx_slave)
+		bond_info->rx_slave = rx_slave;
+
+	return rx_slave;
+}
+
+/* Caller must hold RTNL, rcu_read_lock is obtained only to silence checkers */
+static struct slave *rlb_next_rx_slave(struct bonding *bond)
+{
+	struct slave *rx_slave;
+
+	ASSERT_RTNL();
+
+	rcu_read_lock();
+	rx_slave = __rlb_next_rx_slave(bond);
+	rcu_read_unlock();
+
+	return rx_slave;
+}
+
+/* teach the switch the mac of a disabled slave
+ * on the primary for fault tolerance
+ *
+ * Caller must hold RTNL
+ */
+static void rlb_teach_disabled_mac_on_primary(struct bonding *bond,
+					      const u8 addr[])
+{
+	struct slave *curr_active = rtnl_dereference(bond->curr_active_slave);
+
+	if (!curr_active)
+		return;
+
+	if (!bond->alb_info.primary_is_promisc) {
+		if (!dev_set_promiscuity(curr_active->dev, 1))
+			bond->alb_info.primary_is_promisc = 1;
+		else
+			bond->alb_info.primary_is_promisc = 0;
+	}
+
+	bond->alb_info.rlb_promisc_timeout_counter = 0;
+
+	alb_send_learning_packets(curr_active, addr, true);
+}
+
+/* slave being removed should not be active at this point
+ *
+ * Caller must hold rtnl.
+ */
+static void rlb_clear_slave(struct bonding *bond, struct slave *slave)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	struct rlb_client_info *rx_hash_table;
+	u32 index, next_index;
+
+	/* clear slave from rx_hashtbl */
+	spin_lock_bh(&bond->mode_lock);
+
+	rx_hash_table = bond_info->rx_hashtbl;
+	index = bond_info->rx_hashtbl_used_head;
+	for (; index != RLB_NULL_INDEX; index = next_index) {
+		next_index = rx_hash_table[index].used_next;
+		if (rx_hash_table[index].slave == slave) {
+			struct slave *assigned_slave = rlb_next_rx_slave(bond);
+
+			if (assigned_slave) {
+				rx_hash_table[index].slave = assigned_slave;
+				if (is_valid_ether_addr(rx_hash_table[index].mac_dst)) {
+					bond_info->rx_hashtbl[index].ntt = 1;
+					bond_info->rx_ntt = 1;
+					/* A slave has been removed from the
+					 * table because it is either disabled
+					 * or being released. We must retry the
+					 * update to avoid clients from not
+					 * being updated & disconnecting when
+					 * there is stress
+					 */
+					bond_info->rlb_update_retry_counter =
+						RLB_UPDATE_RETRY;
+				}
+			} else {  /* there is no active slave */
+				rx_hash_table[index].slave = NULL;
+			}
+		}
+	}
+
+	spin_unlock_bh(&bond->mode_lock);
+
+	if (slave != rtnl_dereference(bond->curr_active_slave))
+		rlb_teach_disabled_mac_on_primary(bond, slave->dev->dev_addr);
+}
+
+static void rlb_update_client(struct rlb_client_info *client_info)
+{
+	int i;
+
+	if (!client_info->slave || !is_valid_ether_addr(client_info->mac_dst))
+		return;
+
+	for (i = 0; i < RLB_ARP_BURST_SIZE; i++) {
+		struct sk_buff *skb;
+
+		skb = arp_create(ARPOP_REPLY, ETH_P_ARP,
+				 client_info->ip_dst,
+				 client_info->slave->dev,
+				 client_info->ip_src,
+				 client_info->mac_dst,
+				 client_info->slave->dev->dev_addr,
+				 client_info->mac_dst);
+		if (!skb) {
+			slave_err(client_info->slave->bond->dev,
+				  client_info->slave->dev,
+				  "failed to create an ARP packet\n");
+			continue;
+		}
+
+		skb->dev = client_info->slave->dev;
+
+		if (client_info->vlan_id) {
+			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
+					       client_info->vlan_id);
+		}
+
+		arp_xmit(skb);
+	}
+}
+
+/* sends ARP REPLIES that update the clients that need updating */
+static void rlb_update_rx_clients(struct bonding *bond)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	struct rlb_client_info *client_info;
+	u32 hash_index;
+
+	spin_lock_bh(&bond->mode_lock);
+
+	hash_index = bond_info->rx_hashtbl_used_head;
+	for (; hash_index != RLB_NULL_INDEX;
+	     hash_index = client_info->used_next) {
+		client_info = &(bond_info->rx_hashtbl[hash_index]);
+		if (client_info->ntt) {
+			rlb_update_client(client_info);
+			if (bond_info->rlb_update_retry_counter == 0)
+				client_info->ntt = 0;
+		}
+	}
+
+	/* do not update the entries again until this counter is zero so that
+	 * not to confuse the clients.
+	 */
+	bond_info->rlb_update_delay_counter = RLB_UPDATE_DELAY;
+
+	spin_unlock_bh(&bond->mode_lock);
+}
+
+/* The slave was assigned a new mac address - update the clients */
+static void rlb_req_update_slave_clients(struct bonding *bond, struct slave *slave)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	struct rlb_client_info *client_info;
+	int ntt = 0;
+	u32 hash_index;
+
+	spin_lock_bh(&bond->mode_lock);
+
+	hash_index = bond_info->rx_hashtbl_used_head;
+	for (; hash_index != RLB_NULL_INDEX;
+	     hash_index = client_info->used_next) {
+		client_info = &(bond_info->rx_hashtbl[hash_index]);
+
+		if ((client_info->slave == slave) &&
+		    is_valid_ether_addr(client_info->mac_dst)) {
+			client_info->ntt = 1;
+			ntt = 1;
+		}
+	}
+
+	/* update the team's flag only after the whole iteration */
+	if (ntt) {
+		bond_info->rx_ntt = 1;
+		/* fasten the change */
+		bond_info->rlb_update_retry_counter = RLB_UPDATE_RETRY;
+	}
+
+	spin_unlock_bh(&bond->mode_lock);
+}
+
+/* mark all clients using src_ip to be updated */
+static void rlb_req_update_subnet_clients(struct bonding *bond, __be32 src_ip)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	struct rlb_client_info *client_info;
+	u32 hash_index;
+
+	spin_lock(&bond->mode_lock);
+
+	hash_index = bond_info->rx_hashtbl_used_head;
+	for (; hash_index != RLB_NULL_INDEX;
+	     hash_index = client_info->used_next) {
+		client_info = &(bond_info->rx_hashtbl[hash_index]);
+
+		if (!client_info->slave) {
+			netdev_err(bond->dev, "found a client with no channel in the client's hash table\n");
+			continue;
+		}
+		/* update all clients using this src_ip, that are not assigned
+		 * to the team's address (curr_active_slave) and have a known
+		 * unicast mac address.
+		 */
+		if ((client_info->ip_src == src_ip) &&
+		    !ether_addr_equal_64bits(client_info->slave->dev->dev_addr,
+					     bond->dev->dev_addr) &&
+		    is_valid_ether_addr(client_info->mac_dst)) {
+			client_info->ntt = 1;
+			bond_info->rx_ntt = 1;
+		}
+	}
+
+	spin_unlock(&bond->mode_lock);
+}
+
+static struct slave *rlb_choose_channel(struct sk_buff *skb,
+					struct bonding *bond,
+					const struct arp_pkt *arp)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	struct slave *assigned_slave, *curr_active_slave;
+	struct rlb_client_info *client_info;
+	u32 hash_index = 0;
+
+	spin_lock(&bond->mode_lock);
+
+	curr_active_slave = rcu_dereference(bond->curr_active_slave);
+
+	hash_index = _simple_hash((u8 *)&arp->ip_dst, sizeof(arp->ip_dst));
+	client_info = &(bond_info->rx_hashtbl[hash_index]);
+
+	if (client_info->assigned) {
+		if ((client_info->ip_src == arp->ip_src) &&
+		    (client_info->ip_dst == arp->ip_dst)) {
+			/* the entry is already assigned to this client */
+			if (!is_broadcast_ether_addr(arp->mac_dst)) {
+				/* update mac address from arp */
+				ether_addr_copy(client_info->mac_dst, arp->mac_dst);
+			}
+			ether_addr_copy(client_info->mac_src, arp->mac_src);
+
+			assigned_slave = client_info->slave;
+			if (assigned_slave) {
+				spin_unlock(&bond->mode_lock);
+				return assigned_slave;
+			}
+		} else {
+			/* the entry is already assigned to some other client,
+			 * move the old client to primary (curr_active_slave) so
+			 * that the new client can be assigned to this entry.
+			 */
+			if (curr_active_slave &&
+			    client_info->slave != curr_active_slave) {
+				client_info->slave = curr_active_slave;
+				rlb_update_client(client_info);
+			}
+		}
+	}
+	/* assign a new slave */
+	assigned_slave = __rlb_next_rx_slave(bond);
+
+	if (assigned_slave) {
+		if (!(client_info->assigned &&
+		      client_info->ip_src == arp->ip_src)) {
+			/* ip_src is going to be updated,
+			 * fix the src hash list
+			 */
+			u32 hash_src = _simple_hash((u8 *)&arp->ip_src,
+						    sizeof(arp->ip_src));
+			rlb_src_unlink(bond, hash_index);
+			rlb_src_link(bond, hash_src, hash_index);
+		}
+
+		client_info->ip_src = arp->ip_src;
+		client_info->ip_dst = arp->ip_dst;
+		/* arp->mac_dst is broadcast for arp requests.
+		 * will be updated with clients actual unicast mac address
+		 * upon receiving an arp reply.
+		 */
+		ether_addr_copy(client_info->mac_dst, arp->mac_dst);
+		ether_addr_copy(client_info->mac_src, arp->mac_src);
+		client_info->slave = assigned_slave;
+
+		if (is_valid_ether_addr(client_info->mac_dst)) {
+			client_info->ntt = 1;
+			bond->alb_info.rx_ntt = 1;
+		} else {
+			client_info->ntt = 0;
+		}
+
+		if (vlan_get_tag(skb, &client_info->vlan_id))
+			client_info->vlan_id = 0;
+
+		if (!client_info->assigned) {
+			u32 prev_tbl_head = bond_info->rx_hashtbl_used_head;
+
+			bond_info->rx_hashtbl_used_head = hash_index;
+			client_info->used_next = prev_tbl_head;
+			if (prev_tbl_head != RLB_NULL_INDEX) {
+				bond_info->rx_hashtbl[prev_tbl_head].used_prev =
+					hash_index;
+			}
+			client_info->assigned = 1;
+		}
+	}
+
+	spin_unlock(&bond->mode_lock);
+
+	return assigned_slave;
+}
+
+/* chooses (and returns) transmit channel for arp reply
+ * does not choose channel for other arp types since they are
+ * sent on the curr_active_slave
+ */
+static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond)
+{
+	struct slave *tx_slave = NULL;
+	struct net_device *dev;
+	struct arp_pkt *arp;
+
+	if (!pskb_network_may_pull(skb, sizeof(*arp)))
+		return NULL;
+	arp = (struct arp_pkt *)skb_network_header(skb);
+
+	/* Don't modify or load balance ARPs that do not originate
+	 * from the bond itself or a VLAN directly above the bond.
+	 */
+	if (!bond_slave_has_mac_rcu(bond, arp->mac_src))
+		return NULL;
+
+	dev = ip_dev_find(dev_net(bond->dev), arp->ip_src);
+	if (dev) {
+		if (netif_is_any_bridge_master(dev)) {
+			dev_put(dev);
+			return NULL;
+		}
+		dev_put(dev);
+	}
+
+	if (arp->op_code == htons(ARPOP_REPLY)) {
+		/* the arp must be sent on the selected rx channel */
+		tx_slave = rlb_choose_channel(skb, bond, arp);
+		if (tx_slave)
+			bond_hw_addr_copy(arp->mac_src, tx_slave->dev->dev_addr,
+					  tx_slave->dev->addr_len);
+		netdev_dbg(bond->dev, "(slave %s): Server sent ARP Reply packet\n",
+			   tx_slave ? tx_slave->dev->name : "NULL");
+	} else if (arp->op_code == htons(ARPOP_REQUEST)) {
+		/* Create an entry in the rx_hashtbl for this client as a
+		 * place holder.
+		 * When the arp reply is received the entry will be updated
+		 * with the correct unicast address of the client.
+		 */
+		tx_slave = rlb_choose_channel(skb, bond, arp);
+
+		/* The ARP reply packets must be delayed so that
+		 * they can cancel out the influence of the ARP request.
+		 */
+		bond->alb_info.rlb_update_delay_counter = RLB_UPDATE_DELAY;
+
+		/* arp requests are broadcast and are sent on the primary
+		 * the arp request will collapse all clients on the subnet to
+		 * the primary slave. We must register these clients to be
+		 * updated with their assigned mac.
+		 */
+		rlb_req_update_subnet_clients(bond, arp->ip_src);
+		netdev_dbg(bond->dev, "(slave %s): Server sent ARP Request packet\n",
+			   tx_slave ? tx_slave->dev->name : "NULL");
+	}
+
+	return tx_slave;
+}
+
+static void rlb_rebalance(struct bonding *bond)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	struct slave *assigned_slave;
+	struct rlb_client_info *client_info;
+	int ntt;
+	u32 hash_index;
+
+	spin_lock_bh(&bond->mode_lock);
+
+	ntt = 0;
+	hash_index = bond_info->rx_hashtbl_used_head;
+	for (; hash_index != RLB_NULL_INDEX;
+	     hash_index = client_info->used_next) {
+		client_info = &(bond_info->rx_hashtbl[hash_index]);
+		assigned_slave = __rlb_next_rx_slave(bond);
+		if (assigned_slave && (client_info->slave != assigned_slave)) {
+			client_info->slave = assigned_slave;
+			if (!is_zero_ether_addr(client_info->mac_dst)) {
+				client_info->ntt = 1;
+				ntt = 1;
+			}
+		}
+	}
+
+	/* update the team's flag only after the whole iteration */
+	if (ntt)
+		bond_info->rx_ntt = 1;
+	spin_unlock_bh(&bond->mode_lock);
+}
+
+/* Caller must hold mode_lock */
+static void rlb_init_table_entry_dst(struct rlb_client_info *entry)
+{
+	entry->used_next = RLB_NULL_INDEX;
+	entry->used_prev = RLB_NULL_INDEX;
+	entry->assigned = 0;
+	entry->slave = NULL;
+	entry->vlan_id = 0;
+}
+static void rlb_init_table_entry_src(struct rlb_client_info *entry)
+{
+	entry->src_first = RLB_NULL_INDEX;
+	entry->src_prev = RLB_NULL_INDEX;
+	entry->src_next = RLB_NULL_INDEX;
+}
+
+static void rlb_init_table_entry(struct rlb_client_info *entry)
+{
+	memset(entry, 0, sizeof(struct rlb_client_info));
+	rlb_init_table_entry_dst(entry);
+	rlb_init_table_entry_src(entry);
+}
+
+static void rlb_delete_table_entry_dst(struct bonding *bond, u32 index)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	u32 next_index = bond_info->rx_hashtbl[index].used_next;
+	u32 prev_index = bond_info->rx_hashtbl[index].used_prev;
+
+	if (index == bond_info->rx_hashtbl_used_head)
+		bond_info->rx_hashtbl_used_head = next_index;
+	if (prev_index != RLB_NULL_INDEX)
+		bond_info->rx_hashtbl[prev_index].used_next = next_index;
+	if (next_index != RLB_NULL_INDEX)
+		bond_info->rx_hashtbl[next_index].used_prev = prev_index;
+}
+
+/* unlink a rlb hash table entry from the src list */
+static void rlb_src_unlink(struct bonding *bond, u32 index)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	u32 next_index = bond_info->rx_hashtbl[index].src_next;
+	u32 prev_index = bond_info->rx_hashtbl[index].src_prev;
+
+	bond_info->rx_hashtbl[index].src_next = RLB_NULL_INDEX;
+	bond_info->rx_hashtbl[index].src_prev = RLB_NULL_INDEX;
+
+	if (next_index != RLB_NULL_INDEX)
+		bond_info->rx_hashtbl[next_index].src_prev = prev_index;
+
+	if (prev_index == RLB_NULL_INDEX)
+		return;
+
+	/* is prev_index pointing to the head of this list? */
+	if (bond_info->rx_hashtbl[prev_index].src_first == index)
+		bond_info->rx_hashtbl[prev_index].src_first = next_index;
+	else
+		bond_info->rx_hashtbl[prev_index].src_next = next_index;
+
+}
+
+static void rlb_delete_table_entry(struct bonding *bond, u32 index)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	struct rlb_client_info *entry = &(bond_info->rx_hashtbl[index]);
+
+	rlb_delete_table_entry_dst(bond, index);
+	rlb_init_table_entry_dst(entry);
+
+	rlb_src_unlink(bond, index);
+}
+
+/* add the rx_hashtbl[ip_dst_hash] entry to the list
+ * of entries with identical ip_src_hash
+ */
+static void rlb_src_link(struct bonding *bond, u32 ip_src_hash, u32 ip_dst_hash)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	u32 next;
+
+	bond_info->rx_hashtbl[ip_dst_hash].src_prev = ip_src_hash;
+	next = bond_info->rx_hashtbl[ip_src_hash].src_first;
+	bond_info->rx_hashtbl[ip_dst_hash].src_next = next;
+	if (next != RLB_NULL_INDEX)
+		bond_info->rx_hashtbl[next].src_prev = ip_dst_hash;
+	bond_info->rx_hashtbl[ip_src_hash].src_first = ip_dst_hash;
+}
+
+/* deletes all rx_hashtbl entries with arp->ip_src if their mac_src does
+ * not match arp->mac_src
+ */
+static void rlb_purge_src_ip(struct bonding *bond, struct arp_pkt *arp)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	u32 ip_src_hash = _simple_hash((u8 *)&(arp->ip_src), sizeof(arp->ip_src));
+	u32 index;
+
+	spin_lock_bh(&bond->mode_lock);
+
+	index = bond_info->rx_hashtbl[ip_src_hash].src_first;
+	while (index != RLB_NULL_INDEX) {
+		struct rlb_client_info *entry = &(bond_info->rx_hashtbl[index]);
+		u32 next_index = entry->src_next;
+
+		if (entry->ip_src == arp->ip_src &&
+		    !ether_addr_equal_64bits(arp->mac_src, entry->mac_src))
+			rlb_delete_table_entry(bond, index);
+		index = next_index;
+	}
+	spin_unlock_bh(&bond->mode_lock);
+}
+
+static int rlb_initialize(struct bonding *bond)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	struct rlb_client_info	*new_hashtbl;
+	int size = RLB_HASH_TABLE_SIZE * sizeof(struct rlb_client_info);
+	int i;
+
+	new_hashtbl = kmalloc(size, GFP_KERNEL);
+	if (!new_hashtbl)
+		return -1;
+
+	spin_lock_bh(&bond->mode_lock);
+
+	bond_info->rx_hashtbl = new_hashtbl;
+
+	bond_info->rx_hashtbl_used_head = RLB_NULL_INDEX;
+
+	for (i = 0; i < RLB_HASH_TABLE_SIZE; i++)
+		rlb_init_table_entry(bond_info->rx_hashtbl + i);
+
+	spin_unlock_bh(&bond->mode_lock);
+
+	/* register to receive ARPs */
+	bond->recv_probe = rlb_arp_recv;
+
+	return 0;
+}
+
+static void rlb_deinitialize(struct bonding *bond)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+
+	spin_lock_bh(&bond->mode_lock);
+
+	kfree(bond_info->rx_hashtbl);
+	bond_info->rx_hashtbl = NULL;
+	bond_info->rx_hashtbl_used_head = RLB_NULL_INDEX;
+
+	spin_unlock_bh(&bond->mode_lock);
+}
+
+static void rlb_clear_vlan(struct bonding *bond, unsigned short vlan_id)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	u32 curr_index;
+
+	spin_lock_bh(&bond->mode_lock);
+
+	curr_index = bond_info->rx_hashtbl_used_head;
+	while (curr_index != RLB_NULL_INDEX) {
+		struct rlb_client_info *curr = &(bond_info->rx_hashtbl[curr_index]);
+		u32 next_index = bond_info->rx_hashtbl[curr_index].used_next;
+
+		if (curr->vlan_id == vlan_id)
+			rlb_delete_table_entry(bond, curr_index);
+
+		curr_index = next_index;
+	}
+
+	spin_unlock_bh(&bond->mode_lock);
+}
+
+/*********************** tlb/rlb shared functions *********************/
+
+static void alb_send_lp_vid(struct slave *slave, const u8 mac_addr[],
+			    __be16 vlan_proto, u16 vid)
+{
+	struct learning_pkt pkt;
+	struct sk_buff *skb;
+	int size = sizeof(struct learning_pkt);
+
+	memset(&pkt, 0, size);
+	ether_addr_copy(pkt.mac_dst, mac_addr);
+	ether_addr_copy(pkt.mac_src, mac_addr);
+	pkt.type = cpu_to_be16(ETH_P_LOOPBACK);
+
+	skb = dev_alloc_skb(size);
+	if (!skb)
+		return;
+
+	skb_put_data(skb, &pkt, size);
+
+	skb_reset_mac_header(skb);
+	skb->network_header = skb->mac_header + ETH_HLEN;
+	skb->protocol = pkt.type;
+	skb->priority = TC_PRIO_CONTROL;
+	skb->dev = slave->dev;
+
+	slave_dbg(slave->bond->dev, slave->dev,
+		  "Send learning packet: mac %pM vlan %d\n", mac_addr, vid);
+
+	if (vid)
+		__vlan_hwaccel_put_tag(skb, vlan_proto, vid);
+
+	dev_queue_xmit(skb);
+}
+
+struct alb_walk_data {
+	struct bonding *bond;
+	struct slave *slave;
+	const u8 *mac_addr;
+	bool strict_match;
+};
+
+static int alb_upper_dev_walk(struct net_device *upper,
+			      struct netdev_nested_priv *priv)
+{
+	struct alb_walk_data *data = (struct alb_walk_data *)priv->data;
+	bool strict_match = data->strict_match;
+	const u8 *mac_addr = data->mac_addr;
+	struct bonding *bond = data->bond;
+	struct slave *slave = data->slave;
+	struct bond_vlan_tag *tags;
+
+	if (is_vlan_dev(upper) &&
+	    bond->dev->lower_level == upper->lower_level - 1) {
+		if (upper->addr_assign_type == NET_ADDR_STOLEN) {
+			alb_send_lp_vid(slave, mac_addr,
+					vlan_dev_vlan_proto(upper),
+					vlan_dev_vlan_id(upper));
+		} else {
+			alb_send_lp_vid(slave, upper->dev_addr,
+					vlan_dev_vlan_proto(upper),
+					vlan_dev_vlan_id(upper));
+		}
+	}
+
+	/* If this is a macvlan device, then only send updates
+	 * when strict_match is turned off.
+	 */
+	if (netif_is_macvlan(upper) && !strict_match) {
+		tags = bond_verify_device_path(bond->dev, upper, 0);
+		if (IS_ERR_OR_NULL(tags))
+			BUG();
+		alb_send_lp_vid(slave, upper->dev_addr,
+				tags[0].vlan_proto, tags[0].vlan_id);
+		kfree(tags);
+	}
+
+	return 0;
+}
+
+static void alb_send_learning_packets(struct slave *slave, const u8 mac_addr[],
+				      bool strict_match)
+{
+	struct bonding *bond = bond_get_bond_by_slave(slave);
+	struct netdev_nested_priv priv;
+	struct alb_walk_data data = {
+		.strict_match = strict_match,
+		.mac_addr = mac_addr,
+		.slave = slave,
+		.bond = bond,
+	};
+
+	priv.data = (void *)&data;
+	/* send untagged */
+	alb_send_lp_vid(slave, mac_addr, 0, 0);
+
+	/* loop through all devices and see if we need to send a packet
+	 * for that device.
+	 */
+	rcu_read_lock();
+	netdev_walk_all_upper_dev_rcu(bond->dev, alb_upper_dev_walk, &priv);
+	rcu_read_unlock();
+}
+
+static int alb_set_slave_mac_addr(struct slave *slave, const u8 addr[],
+				  unsigned int len)
+{
+	struct net_device *dev = slave->dev;
+	struct sockaddr_storage ss;
+
+	if (BOND_MODE(slave->bond) == BOND_MODE_TLB) {
+		__dev_addr_set(dev, addr, len);
+		return 0;
+	}
+
+	/* for rlb each slave must have a unique hw mac addresses so that
+	 * each slave will receive packets destined to a different mac
+	 */
+	memcpy(ss.__data, addr, len);
+	ss.ss_family = dev->type;
+	if (dev_set_mac_address(dev, (struct sockaddr *)&ss, NULL)) {
+		slave_err(slave->bond->dev, dev, "dev_set_mac_address on slave failed! ALB mode requires that the base driver support setting the hw address also when the network device's interface is open\n");
+		return -EOPNOTSUPP;
+	}
+	return 0;
+}
+
+/* Swap MAC addresses between two slaves.
+ *
+ * Called with RTNL held, and no other locks.
+ */
+static void alb_swap_mac_addr(struct slave *slave1, struct slave *slave2)
+{
+	u8 tmp_mac_addr[MAX_ADDR_LEN];
+
+	bond_hw_addr_copy(tmp_mac_addr, slave1->dev->dev_addr,
+			  slave1->dev->addr_len);
+	alb_set_slave_mac_addr(slave1, slave2->dev->dev_addr,
+			       slave2->dev->addr_len);
+	alb_set_slave_mac_addr(slave2, tmp_mac_addr,
+			       slave1->dev->addr_len);
+
+}
+
+/* Send learning packets after MAC address swap.
+ *
+ * Called with RTNL and no other locks
+ */
+static void alb_fasten_mac_swap(struct bonding *bond, struct slave *slave1,
+				struct slave *slave2)
+{
+	int slaves_state_differ = (bond_slave_can_tx(slave1) != bond_slave_can_tx(slave2));
+	struct slave *disabled_slave = NULL;
+
+	ASSERT_RTNL();
+
+	/* fasten the change in the switch */
+	if (bond_slave_can_tx(slave1)) {
+		alb_send_learning_packets(slave1, slave1->dev->dev_addr, false);
+		if (bond->alb_info.rlb_enabled) {
+			/* inform the clients that the mac address
+			 * has changed
+			 */
+			rlb_req_update_slave_clients(bond, slave1);
+		}
+	} else {
+		disabled_slave = slave1;
+	}
+
+	if (bond_slave_can_tx(slave2)) {
+		alb_send_learning_packets(slave2, slave2->dev->dev_addr, false);
+		if (bond->alb_info.rlb_enabled) {
+			/* inform the clients that the mac address
+			 * has changed
+			 */
+			rlb_req_update_slave_clients(bond, slave2);
+		}
+	} else {
+		disabled_slave = slave2;
+	}
+
+	if (bond->alb_info.rlb_enabled && slaves_state_differ) {
+		/* A disabled slave was assigned an active mac addr */
+		rlb_teach_disabled_mac_on_primary(bond,
+						  disabled_slave->dev->dev_addr);
+	}
+}
+
+/**
+ * alb_change_hw_addr_on_detach
+ * @bond: bonding we're working on
+ * @slave: the slave that was just detached
+ *
+ * We assume that @slave was already detached from the slave list.
+ *
+ * If @slave's permanent hw address is different both from its current
+ * address and from @bond's address, then somewhere in the bond there's
+ * a slave that has @slave's permanet address as its current address.
+ * We'll make sure that slave no longer uses @slave's permanent address.
+ *
+ * Caller must hold RTNL and no other locks
+ */
+static void alb_change_hw_addr_on_detach(struct bonding *bond, struct slave *slave)
+{
+	int perm_curr_diff;
+	int perm_bond_diff;
+	struct slave *found_slave;
+
+	perm_curr_diff = !ether_addr_equal_64bits(slave->perm_hwaddr,
+						  slave->dev->dev_addr);
+	perm_bond_diff = !ether_addr_equal_64bits(slave->perm_hwaddr,
+						  bond->dev->dev_addr);
+
+	if (perm_curr_diff && perm_bond_diff) {
+		found_slave = bond_slave_has_mac(bond, slave->perm_hwaddr);
+
+		if (found_slave) {
+			alb_swap_mac_addr(slave, found_slave);
+			alb_fasten_mac_swap(bond, slave, found_slave);
+		}
+	}
+}
+
+/**
+ * alb_handle_addr_collision_on_attach
+ * @bond: bonding we're working on
+ * @slave: the slave that was just attached
+ *
+ * checks uniqueness of slave's mac address and handles the case the
+ * new slave uses the bonds mac address.
+ *
+ * If the permanent hw address of @slave is @bond's hw address, we need to
+ * find a different hw address to give @slave, that isn't in use by any other
+ * slave in the bond. This address must be, of course, one of the permanent
+ * addresses of the other slaves.
+ *
+ * We go over the slave list, and for each slave there we compare its
+ * permanent hw address with the current address of all the other slaves.
+ * If no match was found, then we've found a slave with a permanent address
+ * that isn't used by any other slave in the bond, so we can assign it to
+ * @slave.
+ *
+ * assumption: this function is called before @slave is attached to the
+ *	       bond slave list.
+ */
+static int alb_handle_addr_collision_on_attach(struct bonding *bond, struct slave *slave)
+{
+	struct slave *has_bond_addr = rcu_access_pointer(bond->curr_active_slave);
+	struct slave *tmp_slave1, *free_mac_slave = NULL;
+	struct list_head *iter;
+
+	if (!bond_has_slaves(bond)) {
+		/* this is the first slave */
+		return 0;
+	}
+
+	/* if slave's mac address differs from bond's mac address
+	 * check uniqueness of slave's mac address against the other
+	 * slaves in the bond.
+	 */
+	if (!ether_addr_equal_64bits(slave->perm_hwaddr, bond->dev->dev_addr)) {
+		if (!bond_slave_has_mac(bond, slave->dev->dev_addr))
+			return 0;
+
+		/* Try setting slave mac to bond address and fall-through
+		 * to code handling that situation below...
+		 */
+		alb_set_slave_mac_addr(slave, bond->dev->dev_addr,
+				       bond->dev->addr_len);
+	}
+
+	/* The slave's address is equal to the address of the bond.
+	 * Search for a spare address in the bond for this slave.
+	 */
+	bond_for_each_slave(bond, tmp_slave1, iter) {
+		if (!bond_slave_has_mac(bond, tmp_slave1->perm_hwaddr)) {
+			/* no slave has tmp_slave1's perm addr
+			 * as its curr addr
+			 */
+			free_mac_slave = tmp_slave1;
+			break;
+		}
+
+		if (!has_bond_addr) {
+			if (ether_addr_equal_64bits(tmp_slave1->dev->dev_addr,
+						    bond->dev->dev_addr)) {
+
+				has_bond_addr = tmp_slave1;
+			}
+		}
+	}
+
+	if (free_mac_slave) {
+		alb_set_slave_mac_addr(slave, free_mac_slave->perm_hwaddr,
+				       free_mac_slave->dev->addr_len);
+
+		slave_warn(bond->dev, slave->dev, "the slave hw address is in use by the bond; giving it the hw address of %s\n",
+			   free_mac_slave->dev->name);
+
+	} else if (has_bond_addr) {
+		slave_err(bond->dev, slave->dev, "the slave hw address is in use by the bond; couldn't find a slave with a free hw address to give it (this should not have happened)\n");
+		return -EFAULT;
+	}
+
+	return 0;
+}
+
+/**
+ * alb_set_mac_address
+ * @bond: bonding we're working on
+ * @addr: MAC address to set
+ *
+ * In TLB mode all slaves are configured to the bond's hw address, but set
+ * their dev_addr field to different addresses (based on their permanent hw
+ * addresses).
+ *
+ * For each slave, this function sets the interface to the new address and then
+ * changes its dev_addr field to its previous value.
+ *
+ * Unwinding assumes bond's mac address has not yet changed.
+ */
+static int alb_set_mac_address(struct bonding *bond, void *addr)
+{
+	struct slave *slave, *rollback_slave;
+	struct list_head *iter;
+	struct sockaddr_storage ss;
+	char tmp_addr[MAX_ADDR_LEN];
+	int res;
+
+	if (bond->alb_info.rlb_enabled)
+		return 0;
+
+	bond_for_each_slave(bond, slave, iter) {
+		/* save net_device's current hw address */
+		bond_hw_addr_copy(tmp_addr, slave->dev->dev_addr,
+				  slave->dev->addr_len);
+
+		res = dev_set_mac_address(slave->dev, addr, NULL);
+
+		/* restore net_device's hw address */
+		dev_addr_set(slave->dev, tmp_addr);
+
+		if (res)
+			goto unwind;
+	}
+
+	return 0;
+
+unwind:
+	memcpy(ss.__data, bond->dev->dev_addr, bond->dev->addr_len);
+	ss.ss_family = bond->dev->type;
+
+	/* unwind from head to the slave that failed */
+	bond_for_each_slave(bond, rollback_slave, iter) {
+		if (rollback_slave == slave)
+			break;
+		bond_hw_addr_copy(tmp_addr, rollback_slave->dev->dev_addr,
+				  rollback_slave->dev->addr_len);
+		dev_set_mac_address(rollback_slave->dev,
+				    (struct sockaddr *)&ss, NULL);
+		dev_addr_set(rollback_slave->dev, tmp_addr);
+	}
+
+	return res;
+}
+
+/* determine if the packet is NA or NS */
+static bool alb_determine_nd(struct sk_buff *skb, struct bonding *bond)
+{
+	struct ipv6hdr *ip6hdr;
+	struct icmp6hdr *hdr;
+
+	if (!pskb_network_may_pull(skb, sizeof(*ip6hdr)))
+		return true;
+
+	ip6hdr = ipv6_hdr(skb);
+	if (ip6hdr->nexthdr != IPPROTO_ICMPV6)
+		return false;
+
+	if (!pskb_network_may_pull(skb, sizeof(*ip6hdr) + sizeof(*hdr)))
+		return true;
+
+	hdr = icmp6_hdr(skb);
+	return hdr->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT ||
+		hdr->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION;
+}
+
+/************************ exported alb functions ************************/
+
+int bond_alb_initialize(struct bonding *bond, int rlb_enabled)
+{
+	int res;
+
+	res = tlb_initialize(bond);
+	if (res)
+		return res;
+
+	if (rlb_enabled) {
+		res = rlb_initialize(bond);
+		if (res) {
+			tlb_deinitialize(bond);
+			return res;
+		}
+		bond->alb_info.rlb_enabled = 1;
+	} else {
+		bond->alb_info.rlb_enabled = 0;
+	}
+
+	return 0;
+}
+
+void bond_alb_deinitialize(struct bonding *bond)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+
+	tlb_deinitialize(bond);
+
+	if (bond_info->rlb_enabled)
+		rlb_deinitialize(bond);
+}
+
+static netdev_tx_t bond_do_alb_xmit(struct sk_buff *skb, struct bonding *bond,
+				    struct slave *tx_slave)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	struct ethhdr *eth_data = eth_hdr(skb);
+
+	if (!tx_slave) {
+		/* unbalanced or unassigned, send through primary */
+		tx_slave = rcu_dereference(bond->curr_active_slave);
+		if (bond->params.tlb_dynamic_lb)
+			bond_info->unbalanced_load += skb->len;
+	}
+
+	if (tx_slave && bond_slave_can_tx(tx_slave)) {
+		if (tx_slave != rcu_access_pointer(bond->curr_active_slave)) {
+			ether_addr_copy(eth_data->h_source,
+					tx_slave->dev->dev_addr);
+		}
+
+		return bond_dev_queue_xmit(bond, skb, tx_slave->dev);
+	}
+
+	if (tx_slave && bond->params.tlb_dynamic_lb) {
+		spin_lock(&bond->mode_lock);
+		__tlb_clear_slave(bond, tx_slave, 0);
+		spin_unlock(&bond->mode_lock);
+	}
+
+	/* no suitable interface, frame not sent */
+	return bond_tx_drop(bond->dev, skb);
+}
+
+struct slave *bond_xmit_tlb_slave_get(struct bonding *bond,
+				      struct sk_buff *skb)
+{
+	struct slave *tx_slave = NULL;
+	struct ethhdr *eth_data;
+	u32 hash_index;
+
+	skb_reset_mac_header(skb);
+	eth_data = eth_hdr(skb);
+
+	/* Do not TX balance any multicast or broadcast */
+	if (!is_multicast_ether_addr(eth_data->h_dest)) {
+		switch (skb->protocol) {
+		case htons(ETH_P_IPV6):
+			if (alb_determine_nd(skb, bond))
+				break;
+			fallthrough;
+		case htons(ETH_P_IP):
+			hash_index = bond_xmit_hash(bond, skb);
+			if (bond->params.tlb_dynamic_lb) {
+				tx_slave = tlb_choose_channel(bond,
+							      hash_index & 0xFF,
+							      skb->len);
+			} else {
+				struct bond_up_slave *slaves;
+				unsigned int count;
+
+				slaves = rcu_dereference(bond->usable_slaves);
+				count = slaves ? READ_ONCE(slaves->count) : 0;
+				if (likely(count))
+					tx_slave = slaves->arr[hash_index %
+							       count];
+			}
+			break;
+		}
+	}
+	return tx_slave;
+}
+
+netdev_tx_t bond_tlb_xmit(struct sk_buff *skb, struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct slave *tx_slave;
+
+	tx_slave = bond_xmit_tlb_slave_get(bond, skb);
+	return bond_do_alb_xmit(skb, bond, tx_slave);
+}
+
+struct slave *bond_xmit_alb_slave_get(struct bonding *bond,
+				      struct sk_buff *skb)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	static const __be32 ip_bcast = htonl(0xffffffff);
+	struct slave *tx_slave = NULL;
+	const u8 *hash_start = NULL;
+	bool do_tx_balance = true;
+	struct ethhdr *eth_data;
+	u32 hash_index = 0;
+	int hash_size = 0;
+
+	skb_reset_mac_header(skb);
+	eth_data = eth_hdr(skb);
+
+	switch (ntohs(skb->protocol)) {
+	case ETH_P_IP: {
+		const struct iphdr *iph;
+
+		if (is_broadcast_ether_addr(eth_data->h_dest) ||
+		    !pskb_network_may_pull(skb, sizeof(*iph))) {
+			do_tx_balance = false;
+			break;
+		}
+		iph = ip_hdr(skb);
+		if (iph->daddr == ip_bcast || iph->protocol == IPPROTO_IGMP) {
+			do_tx_balance = false;
+			break;
+		}
+		hash_start = (char *)&(iph->daddr);
+		hash_size = sizeof(iph->daddr);
+		break;
+	}
+	case ETH_P_IPV6: {
+		const struct ipv6hdr *ip6hdr;
+
+		/* IPv6 doesn't really use broadcast mac address, but leave
+		 * that here just in case.
+		 */
+		if (is_broadcast_ether_addr(eth_data->h_dest)) {
+			do_tx_balance = false;
+			break;
+		}
+
+		/* IPv6 uses all-nodes multicast as an equivalent to
+		 * broadcasts in IPv4.
+		 */
+		if (ether_addr_equal_64bits(eth_data->h_dest, mac_v6_allmcast)) {
+			do_tx_balance = false;
+			break;
+		}
+
+		if (alb_determine_nd(skb, bond)) {
+			do_tx_balance = false;
+			break;
+		}
+
+		/* The IPv6 header is pulled by alb_determine_nd */
+		/* Additionally, DAD probes should not be tx-balanced as that
+		 * will lead to false positives for duplicate addresses and
+		 * prevent address configuration from working.
+		 */
+		ip6hdr = ipv6_hdr(skb);
+		if (ipv6_addr_any(&ip6hdr->saddr)) {
+			do_tx_balance = false;
+			break;
+		}
+
+		hash_start = (char *)&ip6hdr->daddr;
+		hash_size = sizeof(ip6hdr->daddr);
+		break;
+	}
+	case ETH_P_ARP:
+		do_tx_balance = false;
+		if (bond_info->rlb_enabled)
+			tx_slave = rlb_arp_xmit(skb, bond);
+		break;
+	default:
+		do_tx_balance = false;
+		break;
+	}
+
+	if (do_tx_balance) {
+		if (bond->params.tlb_dynamic_lb) {
+			hash_index = _simple_hash(hash_start, hash_size);
+			tx_slave = tlb_choose_channel(bond, hash_index, skb->len);
+		} else {
+			/*
+			 * do_tx_balance means we are free to select the tx_slave
+			 * So we do exactly what tlb would do for hash selection
+			 */
+
+			struct bond_up_slave *slaves;
+			unsigned int count;
+
+			slaves = rcu_dereference(bond->usable_slaves);
+			count = slaves ? READ_ONCE(slaves->count) : 0;
+			if (likely(count))
+				tx_slave = slaves->arr[bond_xmit_hash(bond, skb) %
+						       count];
+		}
+	}
+	return tx_slave;
+}
+
+netdev_tx_t bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct slave *tx_slave = NULL;
+
+	tx_slave = bond_xmit_alb_slave_get(bond, skb);
+	return bond_do_alb_xmit(skb, bond, tx_slave);
+}
+
+void bond_alb_monitor(struct work_struct *work)
+{
+	struct bonding *bond = container_of(work, struct bonding,
+					    alb_work.work);
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	struct list_head *iter;
+	struct slave *slave;
+
+	if (!bond_has_slaves(bond)) {
+		atomic_set(&bond_info->tx_rebalance_counter, 0);
+		bond_info->lp_counter = 0;
+		goto re_arm;
+	}
+
+	rcu_read_lock();
+
+	atomic_inc(&bond_info->tx_rebalance_counter);
+	bond_info->lp_counter++;
+
+	/* send learning packets */
+	if (bond_info->lp_counter >= BOND_ALB_LP_TICKS(bond)) {
+		bool strict_match;
+
+		bond_for_each_slave_rcu(bond, slave, iter) {
+			/* If updating current_active, use all currently
+			 * user mac addresses (!strict_match).  Otherwise, only
+			 * use mac of the slave device.
+			 * In RLB mode, we always use strict matches.
+			 */
+			strict_match = (slave != rcu_access_pointer(bond->curr_active_slave) ||
+					bond_info->rlb_enabled);
+			alb_send_learning_packets(slave, slave->dev->dev_addr,
+						  strict_match);
+		}
+		bond_info->lp_counter = 0;
+	}
+
+	/* rebalance tx traffic */
+	if (atomic_read(&bond_info->tx_rebalance_counter) >= BOND_TLB_REBALANCE_TICKS) {
+		bond_for_each_slave_rcu(bond, slave, iter) {
+			tlb_clear_slave(bond, slave, 1);
+			if (slave == rcu_access_pointer(bond->curr_active_slave)) {
+				SLAVE_TLB_INFO(slave).load =
+					bond_info->unbalanced_load /
+						BOND_TLB_REBALANCE_INTERVAL;
+				bond_info->unbalanced_load = 0;
+			}
+		}
+		atomic_set(&bond_info->tx_rebalance_counter, 0);
+	}
+
+	if (bond_info->rlb_enabled) {
+		if (bond_info->primary_is_promisc &&
+		    (++bond_info->rlb_promisc_timeout_counter >= RLB_PROMISC_TIMEOUT)) {
+
+			/* dev_set_promiscuity requires rtnl and
+			 * nothing else.  Avoid race with bond_close.
+			 */
+			rcu_read_unlock();
+			if (!rtnl_trylock())
+				goto re_arm;
+
+			bond_info->rlb_promisc_timeout_counter = 0;
+
+			/* If the primary was set to promiscuous mode
+			 * because a slave was disabled then
+			 * it can now leave promiscuous mode.
+			 */
+			dev_set_promiscuity(rtnl_dereference(bond->curr_active_slave)->dev,
+					    -1);
+			bond_info->primary_is_promisc = 0;
+
+			rtnl_unlock();
+			rcu_read_lock();
+		}
+
+		if (bond_info->rlb_rebalance) {
+			bond_info->rlb_rebalance = 0;
+			rlb_rebalance(bond);
+		}
+
+		/* check if clients need updating */
+		if (bond_info->rx_ntt) {
+			if (bond_info->rlb_update_delay_counter) {
+				--bond_info->rlb_update_delay_counter;
+			} else {
+				rlb_update_rx_clients(bond);
+				if (bond_info->rlb_update_retry_counter)
+					--bond_info->rlb_update_retry_counter;
+				else
+					bond_info->rx_ntt = 0;
+			}
+		}
+	}
+	rcu_read_unlock();
+re_arm:
+	queue_delayed_work(bond->wq, &bond->alb_work, alb_delta_in_ticks);
+}
+
+/* assumption: called before the slave is attached to the bond
+ * and not locked by the bond lock
+ */
+int bond_alb_init_slave(struct bonding *bond, struct slave *slave)
+{
+	int res;
+
+	res = alb_set_slave_mac_addr(slave, slave->perm_hwaddr,
+				     slave->dev->addr_len);
+	if (res)
+		return res;
+
+	res = alb_handle_addr_collision_on_attach(bond, slave);
+	if (res)
+		return res;
+
+	tlb_init_slave(slave);
+
+	/* order a rebalance ASAP */
+	atomic_set(&bond->alb_info.tx_rebalance_counter,
+		   BOND_TLB_REBALANCE_TICKS);
+
+	if (bond->alb_info.rlb_enabled)
+		bond->alb_info.rlb_rebalance = 1;
+
+	return 0;
+}
+
+/* Remove slave from tlb and rlb hash tables, and fix up MAC addresses
+ * if necessary.
+ *
+ * Caller must hold RTNL and no other locks
+ */
+void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave)
+{
+	if (bond_has_slaves(bond))
+		alb_change_hw_addr_on_detach(bond, slave);
+
+	tlb_clear_slave(bond, slave, 0);
+
+	if (bond->alb_info.rlb_enabled) {
+		bond->alb_info.rx_slave = NULL;
+		rlb_clear_slave(bond, slave);
+	}
+
+}
+
+void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link)
+{
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+
+	if (link == BOND_LINK_DOWN) {
+		tlb_clear_slave(bond, slave, 0);
+		if (bond->alb_info.rlb_enabled)
+			rlb_clear_slave(bond, slave);
+	} else if (link == BOND_LINK_UP) {
+		/* order a rebalance ASAP */
+		atomic_set(&bond_info->tx_rebalance_counter,
+			   BOND_TLB_REBALANCE_TICKS);
+		if (bond->alb_info.rlb_enabled) {
+			bond->alb_info.rlb_rebalance = 1;
+			/* If the updelay module parameter is smaller than the
+			 * forwarding delay of the switch the rebalance will
+			 * not work because the rebalance arp replies will
+			 * not be forwarded to the clients..
+			 */
+		}
+	}
+
+	if (bond_is_nondyn_tlb(bond)) {
+		if (bond_update_slave_arr(bond, NULL))
+			pr_err("Failed to build slave-array for TLB mode.\n");
+	}
+}
+
+/**
+ * bond_alb_handle_active_change - assign new curr_active_slave
+ * @bond: our bonding struct
+ * @new_slave: new slave to assign
+ *
+ * Set the bond->curr_active_slave to @new_slave and handle
+ * mac address swapping and promiscuity changes as needed.
+ *
+ * Caller must hold RTNL
+ */
+void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave)
+{
+	struct slave *swap_slave;
+	struct slave *curr_active;
+
+	curr_active = rtnl_dereference(bond->curr_active_slave);
+	if (curr_active == new_slave)
+		return;
+
+	if (curr_active && bond->alb_info.primary_is_promisc) {
+		dev_set_promiscuity(curr_active->dev, -1);
+		bond->alb_info.primary_is_promisc = 0;
+		bond->alb_info.rlb_promisc_timeout_counter = 0;
+	}
+
+	swap_slave = curr_active;
+	rcu_assign_pointer(bond->curr_active_slave, new_slave);
+
+	if (!new_slave || !bond_has_slaves(bond))
+		return;
+
+	/* set the new curr_active_slave to the bonds mac address
+	 * i.e. swap mac addresses of old curr_active_slave and new curr_active_slave
+	 */
+	if (!swap_slave)
+		swap_slave = bond_slave_has_mac(bond, bond->dev->dev_addr);
+
+	/* Arrange for swap_slave and new_slave to temporarily be
+	 * ignored so we can mess with their MAC addresses without
+	 * fear of interference from transmit activity.
+	 */
+	if (swap_slave)
+		tlb_clear_slave(bond, swap_slave, 1);
+	tlb_clear_slave(bond, new_slave, 1);
+
+	/* in TLB mode, the slave might flip down/up with the old dev_addr,
+	 * and thus filter bond->dev_addr's packets, so force bond's mac
+	 */
+	if (BOND_MODE(bond) == BOND_MODE_TLB) {
+		struct sockaddr_storage ss;
+		u8 tmp_addr[MAX_ADDR_LEN];
+
+		bond_hw_addr_copy(tmp_addr, new_slave->dev->dev_addr,
+				  new_slave->dev->addr_len);
+
+		bond_hw_addr_copy(ss.__data, bond->dev->dev_addr,
+				  bond->dev->addr_len);
+		ss.ss_family = bond->dev->type;
+		/* we don't care if it can't change its mac, best effort */
+		dev_set_mac_address(new_slave->dev, (struct sockaddr *)&ss,
+				    NULL);
+
+		dev_addr_set(new_slave->dev, tmp_addr);
+	}
+
+	/* curr_active_slave must be set before calling alb_swap_mac_addr */
+	if (swap_slave) {
+		/* swap mac address */
+		alb_swap_mac_addr(swap_slave, new_slave);
+		alb_fasten_mac_swap(bond, swap_slave, new_slave);
+	} else {
+		/* set the new_slave to the bond mac address */
+		alb_set_slave_mac_addr(new_slave, bond->dev->dev_addr,
+				       bond->dev->addr_len);
+		alb_send_learning_packets(new_slave, bond->dev->dev_addr,
+					  false);
+	}
+}
+
+/* Called with RTNL */
+int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct sockaddr_storage *ss = addr;
+	struct slave *curr_active;
+	struct slave *swap_slave;
+	int res;
+
+	if (!is_valid_ether_addr(ss->__data))
+		return -EADDRNOTAVAIL;
+
+	res = alb_set_mac_address(bond, addr);
+	if (res)
+		return res;
+
+	dev_addr_set(bond_dev, ss->__data);
+
+	/* If there is no curr_active_slave there is nothing else to do.
+	 * Otherwise we'll need to pass the new address to it and handle
+	 * duplications.
+	 */
+	curr_active = rtnl_dereference(bond->curr_active_slave);
+	if (!curr_active)
+		return 0;
+
+	swap_slave = bond_slave_has_mac(bond, bond_dev->dev_addr);
+
+	if (swap_slave) {
+		alb_swap_mac_addr(swap_slave, curr_active);
+		alb_fasten_mac_swap(bond, swap_slave, curr_active);
+	} else {
+		alb_set_slave_mac_addr(curr_active, bond_dev->dev_addr,
+				       bond_dev->addr_len);
+
+		alb_send_learning_packets(curr_active,
+					  bond_dev->dev_addr, false);
+		if (bond->alb_info.rlb_enabled) {
+			/* inform clients mac address has changed */
+			rlb_req_update_slave_clients(bond, curr_active);
+		}
+	}
+
+	return 0;
+}
+
+void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id)
+{
+	if (bond->alb_info.rlb_enabled)
+		rlb_clear_vlan(bond, vlan_id);
+}
+
diff --git a/drivers/net/bonding/bond_debugfs.c b/drivers/net/bonding/bond_debugfs.c
new file mode 100644
index 0000000000..b19492a7f6
--- /dev/null
+++ b/drivers/net/bonding/bond_debugfs.c
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+
+#include <net/bonding.h>
+#include <net/bond_alb.h>
+
+#if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_NET_NS)
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+static struct dentry *bonding_debug_root;
+
+/* Show RLB hash table */
+static int bond_debug_rlb_hash_show(struct seq_file *m, void *v)
+{
+	struct bonding *bond = m->private;
+	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+	struct rlb_client_info *client_info;
+	u32 hash_index;
+
+	if (BOND_MODE(bond) != BOND_MODE_ALB)
+		return 0;
+
+	seq_printf(m, "SourceIP        DestinationIP   "
+			"Destination MAC   DEV\n");
+
+	spin_lock_bh(&bond->mode_lock);
+
+	hash_index = bond_info->rx_hashtbl_used_head;
+	for (; hash_index != RLB_NULL_INDEX;
+	     hash_index = client_info->used_next) {
+		client_info = &(bond_info->rx_hashtbl[hash_index]);
+		seq_printf(m, "%-15pI4 %-15pI4 %-17pM %s\n",
+			&client_info->ip_src,
+			&client_info->ip_dst,
+			&client_info->mac_dst,
+			client_info->slave->dev->name);
+	}
+
+	spin_unlock_bh(&bond->mode_lock);
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(bond_debug_rlb_hash);
+
+void bond_debug_register(struct bonding *bond)
+{
+	bond->debug_dir =
+		debugfs_create_dir(bond->dev->name, bonding_debug_root);
+
+	debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
+				bond, &bond_debug_rlb_hash_fops);
+}
+
+void bond_debug_unregister(struct bonding *bond)
+{
+	debugfs_remove_recursive(bond->debug_dir);
+}
+
+void bond_debug_reregister(struct bonding *bond)
+{
+	struct dentry *d;
+
+	d = debugfs_rename(bonding_debug_root, bond->debug_dir,
+			   bonding_debug_root, bond->dev->name);
+	if (!IS_ERR(d)) {
+		bond->debug_dir = d;
+	} else {
+		netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n");
+		bond_debug_unregister(bond);
+	}
+}
+
+void __init bond_create_debugfs(void)
+{
+	bonding_debug_root = debugfs_create_dir("bonding", NULL);
+
+	if (IS_ERR(bonding_debug_root))
+		pr_warn("Warning: Cannot create bonding directory in debugfs\n");
+}
+
+void bond_destroy_debugfs(void)
+{
+	debugfs_remove_recursive(bonding_debug_root);
+	bonding_debug_root = NULL;
+}
+
+
+#else /* !CONFIG_DEBUG_FS */
+
+void bond_debug_register(struct bonding *bond)
+{
+}
+
+void bond_debug_unregister(struct bonding *bond)
+{
+}
+
+void bond_debug_reregister(struct bonding *bond)
+{
+}
+
+void __init bond_create_debugfs(void)
+{
+}
+
+void bond_destroy_debugfs(void)
+{
+}
+
+#endif /* CONFIG_DEBUG_FS */
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
new file mode 100644
index 0000000000..8e6cc0e133
--- /dev/null
+++ b/drivers/net/bonding/bond_main.c
@@ -0,0 +1,6539 @@
+// SPDX-License-Identifier: GPL-1.0+
+/*
+ * originally based on the dummy device.
+ *
+ * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
+ * 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/filter.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/icmp.h>
+#include <linux/icmpv6.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/phy.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/xfrm.h>
+#include <net/bonding.h>
+#include <net/bond_3ad.h>
+#include <net/bond_alb.h>
+#if IS_ENABLED(CONFIG_TLS_DEVICE)
+#include <net/tls.h>
+#endif
+#include <net/ip6_route.h>
+#include <net/xdp.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, 5 for vlan+srcmac");
+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;
+
+static const struct flow_dissector_key flow_keys_bonding_keys[] = {
+	{
+		.key_id = FLOW_DISSECTOR_KEY_CONTROL,
+		.offset = offsetof(struct flow_keys, control),
+	},
+	{
+		.key_id = FLOW_DISSECTOR_KEY_BASIC,
+		.offset = offsetof(struct flow_keys, basic),
+	},
+	{
+		.key_id = FLOW_DISSECTOR_KEY_IPV4_ADDRS,
+		.offset = offsetof(struct flow_keys, addrs.v4addrs),
+	},
+	{
+		.key_id = FLOW_DISSECTOR_KEY_IPV6_ADDRS,
+		.offset = offsetof(struct flow_keys, addrs.v6addrs),
+	},
+	{
+		.key_id = FLOW_DISSECTOR_KEY_TIPC,
+		.offset = offsetof(struct flow_keys, addrs.tipckey),
+	},
+	{
+		.key_id = FLOW_DISSECTOR_KEY_PORTS,
+		.offset = offsetof(struct flow_keys, ports),
+	},
+	{
+		.key_id = FLOW_DISSECTOR_KEY_ICMP,
+		.offset = offsetof(struct flow_keys, icmp),
+	},
+	{
+		.key_id = FLOW_DISSECTOR_KEY_VLAN,
+		.offset = offsetof(struct flow_keys, vlan),
+	},
+	{
+		.key_id = FLOW_DISSECTOR_KEY_FLOW_LABEL,
+		.offset = offsetof(struct flow_keys, tags),
+	},
+	{
+		.key_id = FLOW_DISSECTOR_KEY_GRE_KEYID,
+		.offset = offsetof(struct flow_keys, keyid),
+	},
+};
+
+static struct flow_dissector flow_keys_bonding __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];
+}
+
+/**
+ * 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
+ */
+netdev_tx_t 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)))
+		return bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb);
+
+	return dev_queue_xmit(skb);
+}
+
+static bool bond_sk_check(struct bonding *bond)
+{
+	switch (BOND_MODE(bond)) {
+	case BOND_MODE_8023AD:
+	case BOND_MODE_XOR:
+		if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34)
+			return true;
+		fallthrough;
+	default:
+		return false;
+	}
+}
+
+static bool bond_xdp_check(struct bonding *bond)
+{
+	switch (BOND_MODE(bond)) {
+	case BOND_MODE_ROUNDROBIN:
+	case BOND_MODE_ACTIVEBACKUP:
+		return true;
+	case BOND_MODE_8023AD:
+	case BOND_MODE_XOR:
+		/* vlan+srcmac is not supported with XDP as in most cases the 802.1q
+		 * payload is not in the packet due to hardware offload.
+		 */
+		if (bond->params.xmit_policy != BOND_XMIT_POLICY_VLAN_SRCMAC)
+			return true;
+		fallthrough;
+	default:
+		return false;
+	}
+}
+
+/*---------------------------------- VLAN -----------------------------------*/
+
+/* 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
+ * @proto: network protocol ID
+ * @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
+ * @proto: network protocol ID
+ * @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;
+}
+
+/*---------------------------------- XFRM -----------------------------------*/
+
+#ifdef CONFIG_XFRM_OFFLOAD
+/**
+ * bond_ipsec_add_sa - program device with a security association
+ * @xs: pointer to transformer state struct
+ * @extack: extack point to fill failure reason
+ **/
+static int bond_ipsec_add_sa(struct xfrm_state *xs,
+			     struct netlink_ext_ack *extack)
+{
+	struct net_device *bond_dev = xs->xso.dev;
+	struct bond_ipsec *ipsec;
+	struct bonding *bond;
+	struct slave *slave;
+	int err;
+
+	if (!bond_dev)
+		return -EINVAL;
+
+	rcu_read_lock();
+	bond = netdev_priv(bond_dev);
+	slave = rcu_dereference(bond->curr_active_slave);
+	if (!slave) {
+		rcu_read_unlock();
+		return -ENODEV;
+	}
+
+	if (!slave->dev->xfrmdev_ops ||
+	    !slave->dev->xfrmdev_ops->xdo_dev_state_add ||
+	    netif_is_bond_master(slave->dev)) {
+		NL_SET_ERR_MSG_MOD(extack, "Slave does not support ipsec offload");
+		rcu_read_unlock();
+		return -EINVAL;
+	}
+
+	ipsec = kmalloc(sizeof(*ipsec), GFP_ATOMIC);
+	if (!ipsec) {
+		rcu_read_unlock();
+		return -ENOMEM;
+	}
+	xs->xso.real_dev = slave->dev;
+
+	err = slave->dev->xfrmdev_ops->xdo_dev_state_add(xs, extack);
+	if (!err) {
+		ipsec->xs = xs;
+		INIT_LIST_HEAD(&ipsec->list);
+		spin_lock_bh(&bond->ipsec_lock);
+		list_add(&ipsec->list, &bond->ipsec_list);
+		spin_unlock_bh(&bond->ipsec_lock);
+	} else {
+		kfree(ipsec);
+	}
+	rcu_read_unlock();
+	return err;
+}
+
+static void bond_ipsec_add_sa_all(struct bonding *bond)
+{
+	struct net_device *bond_dev = bond->dev;
+	struct bond_ipsec *ipsec;
+	struct slave *slave;
+
+	rcu_read_lock();
+	slave = rcu_dereference(bond->curr_active_slave);
+	if (!slave)
+		goto out;
+
+	if (!slave->dev->xfrmdev_ops ||
+	    !slave->dev->xfrmdev_ops->xdo_dev_state_add ||
+	    netif_is_bond_master(slave->dev)) {
+		spin_lock_bh(&bond->ipsec_lock);
+		if (!list_empty(&bond->ipsec_list))
+			slave_warn(bond_dev, slave->dev,
+				   "%s: no slave xdo_dev_state_add\n",
+				   __func__);
+		spin_unlock_bh(&bond->ipsec_lock);
+		goto out;
+	}
+
+	spin_lock_bh(&bond->ipsec_lock);
+	list_for_each_entry(ipsec, &bond->ipsec_list, list) {
+		ipsec->xs->xso.real_dev = slave->dev;
+		if (slave->dev->xfrmdev_ops->xdo_dev_state_add(ipsec->xs, NULL)) {
+			slave_warn(bond_dev, slave->dev, "%s: failed to add SA\n", __func__);
+			ipsec->xs->xso.real_dev = NULL;
+		}
+	}
+	spin_unlock_bh(&bond->ipsec_lock);
+out:
+	rcu_read_unlock();
+}
+
+/**
+ * bond_ipsec_del_sa - clear out this specific SA
+ * @xs: pointer to transformer state struct
+ **/
+static void bond_ipsec_del_sa(struct xfrm_state *xs)
+{
+	struct net_device *bond_dev = xs->xso.dev;
+	struct bond_ipsec *ipsec;
+	struct bonding *bond;
+	struct slave *slave;
+
+	if (!bond_dev)
+		return;
+
+	rcu_read_lock();
+	bond = netdev_priv(bond_dev);
+	slave = rcu_dereference(bond->curr_active_slave);
+
+	if (!slave)
+		goto out;
+
+	if (!xs->xso.real_dev)
+		goto out;
+
+	WARN_ON(xs->xso.real_dev != slave->dev);
+
+	if (!slave->dev->xfrmdev_ops ||
+	    !slave->dev->xfrmdev_ops->xdo_dev_state_delete ||
+	    netif_is_bond_master(slave->dev)) {
+		slave_warn(bond_dev, slave->dev, "%s: no slave xdo_dev_state_delete\n", __func__);
+		goto out;
+	}
+
+	slave->dev->xfrmdev_ops->xdo_dev_state_delete(xs);
+out:
+	spin_lock_bh(&bond->ipsec_lock);
+	list_for_each_entry(ipsec, &bond->ipsec_list, list) {
+		if (ipsec->xs == xs) {
+			list_del(&ipsec->list);
+			kfree(ipsec);
+			break;
+		}
+	}
+	spin_unlock_bh(&bond->ipsec_lock);
+	rcu_read_unlock();
+}
+
+static void bond_ipsec_del_sa_all(struct bonding *bond)
+{
+	struct net_device *bond_dev = bond->dev;
+	struct bond_ipsec *ipsec;
+	struct slave *slave;
+
+	rcu_read_lock();
+	slave = rcu_dereference(bond->curr_active_slave);
+	if (!slave) {
+		rcu_read_unlock();
+		return;
+	}
+
+	spin_lock_bh(&bond->ipsec_lock);
+	list_for_each_entry(ipsec, &bond->ipsec_list, list) {
+		if (!ipsec->xs->xso.real_dev)
+			continue;
+
+		if (!slave->dev->xfrmdev_ops ||
+		    !slave->dev->xfrmdev_ops->xdo_dev_state_delete ||
+		    netif_is_bond_master(slave->dev)) {
+			slave_warn(bond_dev, slave->dev,
+				   "%s: no slave xdo_dev_state_delete\n",
+				   __func__);
+		} else {
+			slave->dev->xfrmdev_ops->xdo_dev_state_delete(ipsec->xs);
+		}
+		ipsec->xs->xso.real_dev = NULL;
+	}
+	spin_unlock_bh(&bond->ipsec_lock);
+	rcu_read_unlock();
+}
+
+/**
+ * bond_ipsec_offload_ok - can this packet use the xfrm hw offload
+ * @skb: current data packet
+ * @xs: pointer to transformer state struct
+ **/
+static bool bond_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs)
+{
+	struct net_device *bond_dev = xs->xso.dev;
+	struct net_device *real_dev;
+	struct slave *curr_active;
+	struct bonding *bond;
+	int err;
+
+	bond = netdev_priv(bond_dev);
+	rcu_read_lock();
+	curr_active = rcu_dereference(bond->curr_active_slave);
+	real_dev = curr_active->dev;
+
+	if (BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
+		err = false;
+		goto out;
+	}
+
+	if (!xs->xso.real_dev) {
+		err = false;
+		goto out;
+	}
+
+	if (!real_dev->xfrmdev_ops ||
+	    !real_dev->xfrmdev_ops->xdo_dev_offload_ok ||
+	    netif_is_bond_master(real_dev)) {
+		err = false;
+		goto out;
+	}
+
+	err = real_dev->xfrmdev_ops->xdo_dev_offload_ok(skb, xs);
+out:
+	rcu_read_unlock();
+	return err;
+}
+
+static const struct xfrmdev_ops bond_xfrmdev_ops = {
+	.xdo_dev_state_add = bond_ipsec_add_sa,
+	.xdo_dev_state_delete = bond_ipsec_del_sa,
+	.xdo_dev_offload_ok = bond_ipsec_offload_ok,
+};
+#endif /* CONFIG_XFRM_OFFLOAD */
+
+/*------------------------------- 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_eth_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 */
+		strscpy_pad(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 ndo_eth_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)
+		dev_mc_del(slave_dev, lacpdu_mcast_addr);
+}
+
+/*--------------------------- 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);
+
+		if (bond->dev->flags & IFF_UP)
+			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);
+
+		if (bond->dev->flags & IFF_UP) {
+			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 int bond_set_dev_addr(struct net_device *bond_dev,
+			     struct net_device *slave_dev)
+{
+	int err;
+
+	slave_dbg(bond_dev, slave_dev, "bond_dev=%p slave_dev=%p slave_dev->addr_len=%d\n",
+		  bond_dev, slave_dev, slave_dev->addr_len);
+	err = dev_pre_changeaddr_notify(bond_dev, slave_dev->dev_addr, NULL);
+	if (err)
+		return err;
+
+	__dev_addr_set(bond_dev, slave_dev->dev_addr, slave_dev->addr_len);
+	bond_dev->addr_assign_type = NET_ADDR_STOLEN;
+	call_netdevice_notifiers(NETDEV_CHANGEADDR, bond_dev);
+	return 0;
+}
+
+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) {
+			rv = bond_set_dev_addr(bond->dev, new_active->dev);
+			if (rv)
+				slave_err(bond->dev, new_active->dev, "Error %d setting bond MAC from slave\n",
+					  -rv);
+		}
+		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, NULL);
+		if (rv) {
+			slave_err(bond->dev, new_active->dev, "Error %d setting MAC of new active slave\n",
+				  -rv);
+			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, NULL);
+		if (rv)
+			slave_err(bond->dev, old_active->dev, "Error %d setting MAC of old active slave\n",
+				  -rv);
+out:
+		break;
+	default:
+		netdev_err(bond->dev, "bond_do_fail_over_mac impossible: bad policy %d\n",
+			   bond->params.fail_over_mac);
+		break;
+	}
+
+}
+
+/**
+ * bond_choose_primary_or_current - select the primary or high priority slave
+ * @bond: our bonding struct
+ *
+ * - Check if there is a primary link. If the primary link was set and is up,
+ *   go on and do link reselection.
+ *
+ * - If primary link is not set or down, find the highest priority link.
+ *   If the highest priority link is not current slave, set it as primary
+ *   link and do link reselection.
+ */
+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);
+	struct slave *slave, *hprio = NULL;
+	struct list_head *iter;
+
+	if (!prim || prim->link != BOND_LINK_UP) {
+		bond_for_each_slave(bond, slave, iter) {
+			if (slave->link == BOND_LINK_UP) {
+				hprio = hprio ?: slave;
+				if (slave->prio > hprio->prio)
+					hprio = slave;
+			}
+		}
+
+		if (hprio && hprio != curr) {
+			prim = hprio;
+			goto link_reselect;
+		}
+
+		if (!curr || curr->link != BOND_LINK_UP)
+			return NULL;
+		return curr;
+	}
+
+	if (bond->force_primary) {
+		bond->force_primary = false;
+		return prim;
+	}
+
+link_reselect:
+	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 ||
+	    bond->send_peer_notif %
+	    max(1, bond->params.peer_notif_delay) != 0 ||
+	    !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;
+}
+
+/**
+ * bond_change_active_slave - change the active slave into the specified one
+ * @bond: our bonding struct
+ * @new_active: 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;
+
+#ifdef CONFIG_XFRM_OFFLOAD
+	bond_ipsec_del_sa_all(bond);
+#endif /* CONFIG_XFRM_OFFLOAD */
+
+	if (new_active) {
+		new_active->last_link_up = jiffies;
+
+		if (new_active->link == BOND_LINK_BACK) {
+			if (bond_uses_primary(bond)) {
+				slave_info(bond->dev, new_active->dev, "making interface the new active one %d ms earlier\n",
+					   (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))
+				slave_info(bond->dev, new_active->dev, "making interface the new active one\n");
+		}
+	}
+
+	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 *
+					max(1, bond->params.peer_notif_delay);
+				should_notify_peers =
+					bond_should_notify_peers(bond);
+			}
+
+			call_netdevice_notifiers(NETDEV_BONDING_FAILOVER, bond->dev);
+			if (should_notify_peers) {
+				bond->send_peer_notif--;
+				call_netdevice_notifiers(NETDEV_NOTIFY_PEERS,
+							 bond->dev);
+			}
+		}
+	}
+
+#ifdef CONFIG_XFRM_OFFLOAD
+	bond_ipsec_add_sa_all(bond);
+#endif /* CONFIG_XFRM_OFFLOAD */
+
+	/* 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, "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(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_GSO_SOFTWARE | \
+				 NETIF_F_HIGHDMA | NETIF_F_LRO)
+
+#define BOND_ENC_FEATURES	(NETIF_F_HW_CSUM | NETIF_F_SG | \
+				 NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE)
+
+#define BOND_MPLS_FEATURES	(NETIF_F_HW_CSUM | NETIF_F_SG | \
+				 NETIF_F_GSO_SOFTWARE)
+
+
+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;
+#ifdef CONFIG_XFRM_OFFLOAD
+	netdev_features_t xfrm_features  = BOND_XFRM_FEATURES;
+#endif /* CONFIG_XFRM_OFFLOAD */
+	netdev_features_t mpls_features  = BOND_MPLS_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 tso_max_size = TSO_MAX_SIZE;
+	u16 tso_max_segs = TSO_MAX_SEGS;
+
+	if (!bond_has_slaves(bond))
+		goto done;
+	vlan_features &= NETIF_F_ALL_FOR_ALL;
+	mpls_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);
+
+#ifdef CONFIG_XFRM_OFFLOAD
+		xfrm_features = netdev_increment_features(xfrm_features,
+							  slave->dev->hw_enc_features,
+							  BOND_XFRM_FEATURES);
+#endif /* CONFIG_XFRM_OFFLOAD */
+
+		mpls_features = netdev_increment_features(mpls_features,
+							  slave->dev->mpls_features,
+							  BOND_MPLS_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;
+
+		tso_max_size = min(tso_max_size, slave->dev->tso_max_size);
+		tso_max_segs = min(tso_max_segs, slave->dev->tso_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;
+#ifdef CONFIG_XFRM_OFFLOAD
+	bond_dev->hw_enc_features |= xfrm_features;
+#endif /* CONFIG_XFRM_OFFLOAD */
+	bond_dev->mpls_features = mpls_features;
+	netif_set_tso_max_segs(bond_dev, tso_max_segs);
+	netif_set_tso_max_size(bond_dev, tso_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)
+{
+	bool was_up = !!(bond_dev->flags & IFF_UP);
+
+	dev_close(bond_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);
+
+	if (slave_dev->flags & IFF_POINTOPOINT) {
+		bond_dev->flags &= ~(IFF_BROADCAST | IFF_MULTICAST);
+		bond_dev->flags |= (IFF_POINTOPOINT | IFF_NOARP);
+	}
+	if (was_up)
+		dev_open(bond_dev, NULL);
+}
+
+/* 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 &&
+	    netif_is_bridge_port(bond->dev) &&
+	    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;
+	case BOND_XMIT_POLICY_VLAN_SRCMAC:
+		return NETDEV_LAG_HASH_VLAN_SRCMAC;
+	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;
+	int err;
+
+	type = bond_lag_tx_type(bond);
+	lag_upper_info.tx_type = type;
+	lag_upper_info.hash_type = bond_lag_hash_type(bond, type);
+
+	err = netdev_master_upper_dev_link(slave->dev, bond->dev, slave,
+					   &lag_upper_info, extack);
+	if (err)
+		return err;
+
+	slave->dev->flags |= IFF_SLAVE;
+	return 0;
+}
+
+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);
+}
+
+#define BOND_NL_ERR(bond_dev, extack, errmsg) do {		\
+	if (extack)						\
+		NL_SET_ERR_MSG(extack, errmsg);			\
+	else							\
+		netdev_err(bond_dev, "Error: %s\n", errmsg);	\
+} while (0)
+
+#define SLAVE_NL_ERR(bond_dev, slave_dev, extack, errmsg) do {		\
+	if (extack)							\
+		NL_SET_ERR_MSG(extack, errmsg);				\
+	else								\
+		slave_err(bond_dev, slave_dev, "Error: %s\n", errmsg);	\
+} while (0)
+
+/* The bonding driver uses ether_setup() to convert a master bond device
+ * to ARPHRD_ETHER, that resets the target netdevice's flags so we always
+ * have to restore the IFF_MASTER flag, and only restore IFF_SLAVE and IFF_UP
+ * if they were set
+ */
+static void bond_ether_setup(struct net_device *bond_dev)
+{
+	unsigned int flags = bond_dev->flags & (IFF_SLAVE | IFF_UP);
+
+	ether_setup(bond_dev);
+	bond_dev->flags |= IFF_MASTER | flags;
+	bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING;
+}
+
+void bond_xdp_set_features(struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	xdp_features_t val = NETDEV_XDP_ACT_MASK;
+	struct list_head *iter;
+	struct slave *slave;
+
+	ASSERT_RTNL();
+
+	if (!bond_xdp_check(bond)) {
+		xdp_clear_features_flag(bond_dev);
+		return;
+	}
+
+	bond_for_each_slave(bond, slave, iter)
+		val &= slave->dev->xdp_features;
+
+	xdp_set_features_flag(bond_dev, val);
+}
+
+/* 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 (slave_dev->flags & IFF_MASTER &&
+	    !netif_is_bond_master(slave_dev)) {
+		BOND_NL_ERR(bond_dev, extack,
+			    "Device type (master device) cannot be enslaved");
+		return -EPERM;
+	}
+
+	if (!bond->params.use_carrier &&
+	    slave_dev->ethtool_ops->get_link == NULL &&
+	    slave_ops->ndo_eth_ioctl == NULL) {
+		slave_warn(bond_dev, slave_dev, "no link monitoring support\n");
+	}
+
+	/* already in-use? */
+	if (netdev_is_rx_handler_busy(slave_dev)) {
+		SLAVE_NL_ERR(bond_dev, slave_dev, extack,
+			     "Device is in use and cannot be enslaved");
+		return -EBUSY;
+	}
+
+	if (bond_dev == slave_dev) {
+		BOND_NL_ERR(bond_dev, extack, "Cannot enslave bond to itself.");
+		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) {
+		slave_dbg(bond_dev, slave_dev, "is NETIF_F_VLAN_CHALLENGED\n");
+		if (vlan_uses_dev(bond_dev)) {
+			SLAVE_NL_ERR(bond_dev, slave_dev, extack,
+				     "Can not enslave VLAN challenged device to VLAN enabled bond");
+			return -EPERM;
+		} else {
+			slave_warn(bond_dev, slave_dev, "enslaved VLAN challenged slave. Adding VLANs will be blocked as long as it is part of bond.\n");
+		}
+	} else {
+		slave_dbg(bond_dev, slave_dev, "is !NETIF_F_VLAN_CHALLENGED\n");
+	}
+
+	if (slave_dev->features & NETIF_F_HW_ESP)
+		slave_dbg(bond_dev, slave_dev, "is esp-hw-offload capable\n");
+
+	/* 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) {
+		SLAVE_NL_ERR(bond_dev, slave_dev, extack,
+			     "Device can not be enslaved while up");
+		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) {
+			slave_dbg(bond_dev, slave_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) {
+				slave_err(bond_dev, slave_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
+				bond_ether_setup(bond_dev);
+
+			call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE,
+						 bond_dev);
+		}
+	} else if (bond_dev->type != slave_dev->type) {
+		SLAVE_NL_ERR(bond_dev, slave_dev, extack,
+			     "Device type is different from other slaves");
+		return -EINVAL;
+	}
+
+	if (slave_dev->type == ARPHRD_INFINIBAND &&
+	    BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
+		SLAVE_NL_ERR(bond_dev, slave_dev, extack,
+			     "Only active-backup mode is supported for infiniband slaves");
+		res = -EOPNOTSUPP;
+		goto err_undo_flags;
+	}
+
+	if (!slave_ops->ndo_set_mac_address ||
+	    slave_dev->type == ARPHRD_INFINIBAND) {
+		slave_warn(bond_dev, slave_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;
+				slave_warn(bond_dev, slave_dev, "Setting fail_over_mac to active for active-backup mode\n");
+			} else {
+				SLAVE_NL_ERR(bond_dev, slave_dev, extack,
+					     "Slave device does not support setting the MAC address, but fail_over_mac is not set to active");
+				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) {
+		res = bond_set_dev_addr(bond->dev, slave_dev);
+		if (res)
+			goto err_undo_flags;
+	}
+
+	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) {
+		slave_err(bond_dev, slave_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,
+					  extack);
+		if (res) {
+			slave_err(bond_dev, slave_dev, "Error %d calling set_mac_address\n", res);
+			goto err_restore_mtu;
+		}
+	}
+
+	/* set no_addrconf flag before open to prevent IPv6 addrconf */
+	slave_dev->priv_flags |= IFF_NO_ADDRCONF;
+
+	/* open the slave since the application closed it */
+	res = dev_open(slave_dev, extack);
+	if (res) {
+		slave_err(bond_dev, slave_dev, "Opening slave failed\n");
+		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) {
+		slave_err(bond_dev, slave_dev, "Couldn't add bond vlan ids\n");
+		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;
+
+	new_slave->last_tx = 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.
+			 */
+			slave_warn(bond_dev, slave_dev, "MII and ETHTOOL support not available for slave, and arp_interval/arp_ip_target module parameters not specified, thus bonding will not detect link failures! see bonding.txt for details\n");
+		} else if (link_reporting == -1) {
+			/* unable get link status using mii/ethtool */
+			slave_warn(bond_dev, slave_dev, "can't get link status from slave; 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");
+		}
+	}
+
+	/* 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;
+	slave_dbg(bond_dev, slave_dev, "Initial state of slave 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);
+		} 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:
+		slave_dbg(bond_dev, slave_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)) {
+			slave_info(bond_dev, slave_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) {
+		slave_dbg(bond_dev, slave_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) {
+		slave_dbg(bond_dev, slave_dev, "Error %d calling bond_master_upper_dev_link\n", res);
+		goto err_unregister;
+	}
+
+	bond_lower_state_changed(new_slave);
+
+	res = bond_sysfs_slave_add(new_slave);
+	if (res) {
+		slave_dbg(bond_dev, slave_dev, "Error %d calling bond_sysfs_slave_add\n", res);
+		goto err_upper_unlink;
+	}
+
+	/* 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;
+			}
+		}
+
+		if (bond_dev->flags & IFF_UP) {
+			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)
+				dev_mc_add(slave_dev, lacpdu_mcast_addr);
+		}
+	}
+
+	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);
+
+
+	if (!slave_dev->netdev_ops->ndo_bpf ||
+	    !slave_dev->netdev_ops->ndo_xdp_xmit) {
+		if (bond->xdp_prog) {
+			SLAVE_NL_ERR(bond_dev, slave_dev, extack,
+				     "Slave does not support XDP");
+			res = -EOPNOTSUPP;
+			goto err_sysfs_del;
+		}
+	} else if (bond->xdp_prog) {
+		struct netdev_bpf xdp = {
+			.command = XDP_SETUP_PROG,
+			.flags   = 0,
+			.prog    = bond->xdp_prog,
+			.extack  = extack,
+		};
+
+		if (dev_xdp_prog_count(slave_dev) > 0) {
+			SLAVE_NL_ERR(bond_dev, slave_dev, extack,
+				     "Slave has XDP program loaded, please unload before enslaving");
+			res = -EOPNOTSUPP;
+			goto err_sysfs_del;
+		}
+
+		res = slave_dev->netdev_ops->ndo_bpf(slave_dev, &xdp);
+		if (res < 0) {
+			/* ndo_bpf() sets extack error message */
+			slave_dbg(bond_dev, slave_dev, "Error %d calling ndo_bpf\n", res);
+			goto err_sysfs_del;
+		}
+		if (bond->xdp_prog)
+			bpf_prog_inc(bond->xdp_prog);
+	}
+
+	bond_xdp_set_features(bond_dev);
+
+	slave_info(bond_dev, slave_dev, "Enslaving as %s interface with %s link\n",
+		   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->priv_flags &= ~IFF_NO_ADDRCONF;
+	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, NULL);
+	}
+
+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);
+			bond_ether_setup(bond_dev);
+		}
+	}
+
+	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)) {
+		slave_dbg(bond_dev, slave_dev, "cannot release slave\n");
+		return -EINVAL;
+	}
+
+	block_netpoll_tx();
+
+	slave = bond_get_slave_by_dev(bond, slave_dev);
+	if (!slave) {
+		/* not a slave of this bond */
+		slave_info(bond_dev, slave_dev, "interface not enslaved\n");
+		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);
+
+	if (bond->xdp_prog) {
+		struct netdev_bpf xdp = {
+			.command = XDP_SETUP_PROG,
+			.flags   = 0,
+			.prog	 = NULL,
+			.extack  = NULL,
+		};
+		if (slave_dev->netdev_ops->ndo_bpf(slave_dev, &xdp))
+			slave_warn(bond_dev, slave_dev, "failed to unload XDP program\n");
+	}
+
+	/* 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);
+
+	slave_info(bond_dev, slave_dev, "Releasing %s interface\n",
+		    bond_is_active_slave(slave) ? "active" : "backup");
+
+	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))
+			slave_warn(bond_dev, slave_dev, "the permanent HWaddr of slave - %pM - is still in use by bond - set the HWaddr of slave to a different address to avoid conflicts\n",
+				   slave->perm_hwaddr);
+	}
+
+	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);
+	}
+
+	bond_set_carrier(bond);
+	if (!bond_has_slaves(bond))
+		eth_hw_addr_random(bond_dev);
+
+	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))
+		slave_info(bond_dev, slave_dev, "last VLAN challenged slave left bond - VLAN blocking is removed\n");
+
+	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);
+
+		if (old_flags & IFF_UP)
+			bond_hw_addr_flush(bond_dev, slave_dev);
+	}
+
+	slave_disable_netpoll(slave);
+
+	/* close slave before restoring its mac address */
+	dev_close(slave_dev);
+
+	slave_dev->priv_flags &= ~IFF_NO_ADDRCONF;
+
+	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, NULL);
+	}
+
+	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;
+
+	bond_xdp_set_features(bond_dev);
+	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\n");
+		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)
+{
+	bool ignore_updelay = false;
+	int link_state, commit = 0;
+	struct list_head *iter;
+	struct slave *slave;
+
+	if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) {
+		ignore_updelay = !rcu_dereference(bond->curr_active_slave);
+	} else {
+		struct bond_up_slave *usable_slaves;
+
+		usable_slaves = rcu_dereference(bond->usable_slaves);
+
+		if (usable_slaves && usable_slaves->count == 0)
+			ignore_updelay = true;
+	}
+
+	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) {
+				slave_info(bond->dev, slave->dev, "link status down for %sinterface, disabling it in %d ms\n",
+					   (BOND_MODE(bond) ==
+					    BOND_MODE_ACTIVEBACKUP) ?
+					    (bond_is_active_slave(slave) ?
+					     "active " : "backup ") : "",
+					   bond->params.downdelay * bond->params.miimon);
+			}
+			fallthrough;
+		case BOND_LINK_FAIL:
+			if (link_state) {
+				/* recovered before downdelay expired */
+				bond_propose_link_state(slave, BOND_LINK_UP);
+				slave->last_link_up = jiffies;
+				slave_info(bond->dev, slave->dev, "link status up again after %d ms\n",
+					   (bond->params.downdelay - slave->delay) *
+					   bond->params.miimon);
+				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) {
+				slave_info(bond->dev, slave->dev, "link status up, enabling it in %d ms\n",
+					   ignore_updelay ? 0 :
+					   bond->params.updelay *
+					   bond->params.miimon);
+			}
+			fallthrough;
+		case BOND_LINK_BACK:
+			if (!link_state) {
+				bond_propose_link_state(slave, BOND_LINK_DOWN);
+				slave_info(bond->dev, slave->dev, "link status down again after %d ms\n",
+					   (bond->params.updelay - slave->delay) *
+					   bond->params.miimon);
+				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 slave *slave, *primary, *active;
+	bool do_failover = false;
+	struct list_head *iter;
+
+	ASSERT_RTNL();
+
+	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())
+					slave_warn(bond->dev, slave->dev,
+						   "failed to get link speed/duplex\n");
+				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);
+			}
+
+			slave_info(bond->dev, slave->dev, "link status definitely up, %u Mbps %s duplex\n",
+				   slave->speed == SPEED_UNKNOWN ? 0 : slave->speed,
+				   slave->duplex ? "full" : "half");
+
+			bond_miimon_link_change(bond, slave, BOND_LINK_UP);
+
+			active = rtnl_dereference(bond->curr_active_slave);
+			if (!active || slave == primary || slave->prio > active->prio)
+				do_failover = true;
+
+			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);
+
+			slave_info(bond->dev, slave->dev, "link status definitely down, disabling slave\n");
+
+			bond_miimon_link_change(bond, slave, BOND_LINK_DOWN);
+
+			if (slave == rcu_access_pointer(bond->curr_active_slave))
+				do_failover = true;
+
+			continue;
+
+		default:
+			slave_err(bond->dev, slave->dev, "invalid new link %d on slave\n",
+				  slave->link_new_state);
+			bond_propose_link_state(slave, BOND_LINK_NOCHANGE);
+
+			continue;
+		}
+	}
+
+	if (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;
+	bool commit;
+	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);
+	commit = !!bond_miimon_inspect(bond);
+	if (bond->send_peer_notif) {
+		rcu_read_unlock();
+		if (rtnl_trylock()) {
+			bond->send_peer_notif--;
+			rtnl_unlock();
+		}
+	} else {
+		rcu_read_unlock();
+	}
+
+	if (commit) {
+		/* 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 */
+	}
+
+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,
+			       struct netdev_nested_priv *priv)
+{
+	__be32 ip = *(__be32 *)priv->data;
+
+	return ip == bond_confirm_addr(upper, 0, ip);
+}
+
+static bool bond_has_this_ip(struct bonding *bond, __be32 ip)
+{
+	struct netdev_nested_priv priv = {
+		.data = (void *)&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, &priv))
+		ret = true;
+	rcu_read_unlock();
+
+	return ret;
+}
+
+#define BOND_VLAN_PROTO_NONE cpu_to_be16(0xffff)
+
+static bool bond_handle_vlan(struct slave *slave, struct bond_vlan_tag *tags,
+			     struct sk_buff *skb)
+{
+	struct net_device *bond_dev = slave->bond->dev;
+	struct net_device *slave_dev = slave->dev;
+	struct bond_vlan_tag *outer_tag = tags;
+
+	if (!tags || tags->vlan_proto == BOND_VLAN_PROTO_NONE)
+		return true;
+
+	tags++;
+
+	/* Go through all the tags backwards and add them to the packet */
+	while (tags->vlan_proto != BOND_VLAN_PROTO_NONE) {
+		if (!tags->vlan_id) {
+			tags++;
+			continue;
+		}
+
+		slave_dbg(bond_dev, 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 false;
+		}
+
+		tags++;
+	}
+	/* Set the outer tag */
+	if (outer_tag->vlan_id) {
+		slave_dbg(bond_dev, 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);
+	}
+
+	return true;
+}
+
+/* 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 slave *slave, int arp_op, __be32 dest_ip,
+			  __be32 src_ip, struct bond_vlan_tag *tags)
+{
+	struct net_device *bond_dev = slave->bond->dev;
+	struct net_device *slave_dev = slave->dev;
+	struct sk_buff *skb;
+
+	slave_dbg(bond_dev, slave_dev, "arp %d on slave: dst %pI4 src %pI4\n",
+		  arp_op, &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 (bond_handle_vlan(slave, tags, skb)) {
+		slave_update_last_tx(slave);
+		arp_xmit(skb);
+	}
+
+	return;
+}
+
+/* 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 = BOND_VLAN_PROTO_NONE;
+		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++) {
+		slave_dbg(bond->dev, slave->dev, "%s: target %pI4\n",
+			  __func__, &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)
+				pr_warn_once("%s: no route to arp_ip_target %pI4 and arp_validate is set\n",
+					     bond->dev->name,
+					     &targets[i]);
+			bond_arp_send(slave, 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 */
+		slave_dbg(bond->dev, slave->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, 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)) {
+		slave_dbg(bond->dev, slave->dev, "%s: sip %pI4 tip %pI4 not found\n",
+			   __func__, &sip, &tip);
+		return;
+	}
+
+	i = bond_get_targets_ip(bond->params.arp_targets, sip);
+	if (i == -1) {
+		slave_dbg(bond->dev, slave->dev, "%s: sip %pI4 not found in targets\n",
+			   __func__, &sip);
+		return;
+	}
+	slave->last_rx = jiffies;
+	slave->target_last_arp_rx[i] = jiffies;
+}
+
+static 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;
+	unsigned int alen;
+
+	alen = arp_hdr_len(bond->dev);
+
+	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);
+
+	slave_dbg(bond->dev, slave->dev, "%s: %s/%d av %d sv %d sip %pI4 tip %pI4\n",
+		  __func__, 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, slave_last_tx(curr_arp_slave), 1))
+		bond_validate_arp(bond, slave, sip, tip);
+
+out_unlock:
+	if (arp != (struct arphdr *)skb->data)
+		kfree(arp);
+	return RX_HANDLER_ANOTHER;
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static void bond_ns_send(struct slave *slave, const struct in6_addr *daddr,
+			 const struct in6_addr *saddr, struct bond_vlan_tag *tags)
+{
+	struct net_device *bond_dev = slave->bond->dev;
+	struct net_device *slave_dev = slave->dev;
+	struct in6_addr mcaddr;
+	struct sk_buff *skb;
+
+	slave_dbg(bond_dev, slave_dev, "NS on slave: dst %pI6c src %pI6c\n",
+		  daddr, saddr);
+
+	skb = ndisc_ns_create(slave_dev, daddr, saddr, 0);
+	if (!skb) {
+		net_err_ratelimited("NS packet allocation failed\n");
+		return;
+	}
+
+	addrconf_addr_solict_mult(daddr, &mcaddr);
+	if (bond_handle_vlan(slave, tags, skb)) {
+		slave_update_last_tx(slave);
+		ndisc_send_skb(skb, &mcaddr, saddr);
+	}
+}
+
+static void bond_ns_send_all(struct bonding *bond, struct slave *slave)
+{
+	struct in6_addr *targets = bond->params.ns_targets;
+	struct bond_vlan_tag *tags;
+	struct dst_entry *dst;
+	struct in6_addr saddr;
+	struct flowi6 fl6;
+	int i;
+
+	for (i = 0; i < BOND_MAX_NS_TARGETS && !ipv6_addr_any(&targets[i]); i++) {
+		slave_dbg(bond->dev, slave->dev, "%s: target %pI6c\n",
+			  __func__, &targets[i]);
+		tags = NULL;
+
+		/* Find out through which dev should the packet go */
+		memset(&fl6, 0, sizeof(struct flowi6));
+		fl6.daddr = targets[i];
+		fl6.flowi6_oif = bond->dev->ifindex;
+
+		dst = ip6_route_output(dev_net(bond->dev), NULL, &fl6);
+		if (dst->error) {
+			dst_release(dst);
+			/* there's no route to target - try to send arp
+			 * probe to generate any traffic (arp_validate=0)
+			 */
+			if (bond->params.arp_validate)
+				pr_warn_once("%s: no route to ns_ip6_target %pI6c and arp_validate is set\n",
+					     bond->dev->name,
+					     &targets[i]);
+			bond_ns_send(slave, &targets[i], &in6addr_any, tags);
+			continue;
+		}
+
+		/* bond device itself */
+		if (dst->dev == bond->dev)
+			goto found;
+
+		rcu_read_lock();
+		tags = bond_verify_device_path(bond->dev, dst->dev, 0);
+		rcu_read_unlock();
+
+		if (!IS_ERR_OR_NULL(tags))
+			goto found;
+
+		/* Not our device - skip */
+		slave_dbg(bond->dev, slave->dev, "no path to ns_ip6_target %pI6c via dst->dev %s\n",
+			  &targets[i], dst->dev ? dst->dev->name : "NULL");
+
+		dst_release(dst);
+		continue;
+
+found:
+		if (!ipv6_dev_get_saddr(dev_net(dst->dev), dst->dev, &targets[i], 0, &saddr))
+			bond_ns_send(slave, &targets[i], &saddr, tags);
+		else
+			bond_ns_send(slave, &targets[i], &in6addr_any, tags);
+
+		dst_release(dst);
+		kfree(tags);
+	}
+}
+
+static int bond_confirm_addr6(struct net_device *dev,
+			      struct netdev_nested_priv *priv)
+{
+	struct in6_addr *addr = (struct in6_addr *)priv->data;
+
+	return ipv6_chk_addr(dev_net(dev), addr, dev, 0);
+}
+
+static bool bond_has_this_ip6(struct bonding *bond, struct in6_addr *addr)
+{
+	struct netdev_nested_priv priv = {
+		.data = addr,
+	};
+	int ret = false;
+
+	if (bond_confirm_addr6(bond->dev, &priv))
+		return true;
+
+	rcu_read_lock();
+	if (netdev_walk_all_upper_dev_rcu(bond->dev, bond_confirm_addr6, &priv))
+		ret = true;
+	rcu_read_unlock();
+
+	return ret;
+}
+
+static void bond_validate_na(struct bonding *bond, struct slave *slave,
+			     struct in6_addr *saddr, struct in6_addr *daddr)
+{
+	int i;
+
+	/* Ignore NAs that:
+	 * 1. Source address is unspecified address.
+	 * 2. Dest address is neither all-nodes multicast address nor
+	 *    exist on bond interface.
+	 */
+	if (ipv6_addr_any(saddr) ||
+	    (!ipv6_addr_equal(daddr, &in6addr_linklocal_allnodes) &&
+	     !bond_has_this_ip6(bond, daddr))) {
+		slave_dbg(bond->dev, slave->dev, "%s: sip %pI6c tip %pI6c not found\n",
+			  __func__, saddr, daddr);
+		return;
+	}
+
+	i = bond_get_targets_ip6(bond->params.ns_targets, saddr);
+	if (i == -1) {
+		slave_dbg(bond->dev, slave->dev, "%s: sip %pI6c not found in targets\n",
+			  __func__, saddr);
+		return;
+	}
+	slave->last_rx = jiffies;
+	slave->target_last_arp_rx[i] = jiffies;
+}
+
+static int bond_na_rcv(const struct sk_buff *skb, struct bonding *bond,
+		       struct slave *slave)
+{
+	struct slave *curr_active_slave, *curr_arp_slave;
+	struct in6_addr *saddr, *daddr;
+	struct {
+		struct ipv6hdr ip6;
+		struct icmp6hdr icmp6;
+	} *combined, _combined;
+
+	if (skb->pkt_type == PACKET_OTHERHOST ||
+	    skb->pkt_type == PACKET_LOOPBACK)
+		goto out;
+
+	combined = skb_header_pointer(skb, 0, sizeof(_combined), &_combined);
+	if (!combined || combined->ip6.nexthdr != NEXTHDR_ICMP ||
+	    (combined->icmp6.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION &&
+	     combined->icmp6.icmp6_type != NDISC_NEIGHBOUR_ADVERTISEMENT))
+		goto out;
+
+	saddr = &combined->ip6.saddr;
+	daddr = &combined->ip6.daddr;
+
+	slave_dbg(bond->dev, slave->dev, "%s: %s/%d av %d sv %d sip %pI6c tip %pI6c\n",
+		  __func__, slave->dev->name, bond_slave_state(slave),
+		  bond->params.arp_validate, slave_do_arp_validate(bond, slave),
+		  saddr, daddr);
+
+	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:
+	 * see bond_arp_rcv().
+	 */
+	if (bond_is_active_slave(slave))
+		bond_validate_na(bond, slave, saddr, daddr);
+	else if (curr_active_slave &&
+		 time_after(slave_last_rx(bond, curr_active_slave),
+			    curr_active_slave->last_link_up))
+		bond_validate_na(bond, slave, daddr, saddr);
+	else if (curr_arp_slave &&
+		 bond_time_in_interval(bond, slave_last_tx(curr_arp_slave), 1))
+		bond_validate_na(bond, slave, saddr, daddr);
+
+out:
+	return RX_HANDLER_ANOTHER;
+}
+#endif
+
+int bond_rcv_validate(const struct sk_buff *skb, struct bonding *bond,
+		      struct slave *slave)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+	bool is_ipv6 = skb->protocol == __cpu_to_be16(ETH_P_IPV6);
+#endif
+	bool is_arp = skb->protocol == __cpu_to_be16(ETH_P_ARP);
+
+	slave_dbg(bond->dev, slave->dev, "%s: skb->dev %s\n",
+		  __func__, skb->dev->name);
+
+	/* Use arp validate logic for both ARP and NS */
+	if (!slave_do_arp_validate(bond, slave)) {
+		if ((slave_do_arp_validate_only(bond) && is_arp) ||
+#if IS_ENABLED(CONFIG_IPV6)
+		    (slave_do_arp_validate_only(bond) && is_ipv6) ||
+#endif
+		    !slave_do_arp_validate_only(bond))
+			slave->last_rx = jiffies;
+		return RX_HANDLER_ANOTHER;
+	} else if (is_arp) {
+		return bond_arp_rcv(skb, bond, slave);
+#if IS_ENABLED(CONFIG_IPV6)
+	} else if (is_ipv6) {
+		return bond_na_rcv(skb, bond, slave);
+#endif
+	} else {
+		return RX_HANDLER_ANOTHER;
+	}
+}
+
+static void bond_send_validate(struct bonding *bond, struct slave *slave)
+{
+	bond_arp_send_all(bond, slave);
+#if IS_ENABLED(CONFIG_IPV6)
+	bond_ns_send_all(bond, slave);
+#endif
+}
+
+/* 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 last_tx = slave_last_tx(slave);
+
+		bond_propose_link_state(slave, BOND_LINK_NOCHANGE);
+
+		if (slave->link != BOND_LINK_UP) {
+			if (bond_time_in_interval(bond, last_tx, 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) {
+					slave_info(bond->dev, slave->dev, "link status definitely up\n");
+					do_failover = 1;
+				} else {
+					slave_info(bond->dev, slave->dev, "interface is now up\n");
+				}
+			}
+		} 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, last_tx, bond->params.missed_max) ||
+			    !bond_time_in_interval(bond, slave->last_rx, bond->params.missed_max)) {
+
+				bond_propose_link_state(slave, BOND_LINK_DOWN);
+				slave_state_changed = 1;
+
+				if (slave->link_failure_count < UINT_MAX)
+					slave->link_failure_count++;
+
+				slave_info(bond->dev, slave->dev, "interface is now down\n");
+
+				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_send_validate(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 last_tx, 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 (missed_max+1)*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, bond->params.missed_max + 1)) {
+			bond_propose_link_state(slave, BOND_LINK_DOWN);
+			commit++;
+		}
+
+		/* Active slave is down if:
+		 * - more than missed_max*delta since transmitting OR
+		 * - (more than missed_max*delta since receive AND
+		 *    the bond has an IP address)
+		 */
+		last_tx = slave_last_tx(slave);
+		if (bond_is_active_slave(slave) &&
+		    (!bond_time_in_interval(bond, last_tx, bond->params.missed_max) ||
+		     !bond_time_in_interval(bond, last_rx, bond->params.missed_max))) {
+			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)
+{
+	bool do_failover = false;
+	struct list_head *iter;
+	unsigned long last_tx;
+	struct slave *slave;
+
+	bond_for_each_slave(bond, slave, iter) {
+		switch (slave->link_new_state) {
+		case BOND_LINK_NOCHANGE:
+			continue;
+
+		case BOND_LINK_UP:
+			last_tx = slave_last_tx(slave);
+			if (rtnl_dereference(bond->curr_active_slave) != slave ||
+			    (!rtnl_dereference(bond->curr_active_slave) &&
+			     bond_time_in_interval(bond, last_tx, 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);
+				}
+
+				slave_info(bond->dev, slave->dev, "link status definitely up\n");
+
+				if (!rtnl_dereference(bond->curr_active_slave) ||
+				    slave == rtnl_dereference(bond->primary_slave) ||
+				    slave->prio > rtnl_dereference(bond->curr_active_slave)->prio)
+					do_failover = true;
+
+			}
+
+			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);
+
+			slave_info(bond->dev, slave->dev, "link status definitely down, disabling slave\n");
+
+			if (slave == rtnl_dereference(bond->curr_active_slave)) {
+				RCU_INIT_POINTER(bond->current_arp_slave, NULL);
+				do_failover = true;
+			}
+
+			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:
+			slave_err(bond->dev, slave->dev,
+				  "impossible: link_new_state %d on slave\n",
+				  slave->link_new_state);
+			continue;
+		}
+	}
+
+	if (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_send_validate(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);
+
+			slave_info(bond->dev, slave->dev, "backup interface is now down\n");
+		}
+		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_send_validate(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) {
+			bond->send_peer_notif--;
+			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);
+
+	netdev_dbg(bond_dev, "%s called\n", __func__);
+
+	switch (event) {
+	case NETDEV_CHANGENAME:
+		return bond_event_changename(event_bond);
+	case NETDEV_UNREGISTER:
+		bond_remove_proc_entry(event_bond);
+#ifdef CONFIG_XFRM_OFFLOAD
+		xfrm_dev_state_flush(dev_net(bond_dev), bond_dev, true);
+#endif /* CONFIG_XFRM_OFFLOAD */
+		break;
+	case NETDEV_REGISTER:
+		bond_create_proc_entry(event_bond);
+		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) {
+		netdev_dbg(slave_dev, "%s called on NULL slave\n", __func__);
+		return NOTIFY_DONE;
+	}
+
+	bond_dev = slave->bond->dev;
+	bond = slave->bond;
+	primary = rtnl_dereference(bond->primary_slave);
+
+	slave_dbg(bond_dev, slave_dev, "%s called\n", __func__);
+
+	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:
+		if (!bond->notifier_ctx) {
+			bond->notifier_ctx = true;
+			bond_compute_features(bond);
+			bond->notifier_ctx = false;
+		}
+		break;
+	case NETDEV_RESEND_IGMP:
+		/* Propagate to master device */
+		call_netdevice_notifiers(event, slave->bond->dev);
+		break;
+	case NETDEV_XDP_FEAT_CHANGE:
+		bond_xdp_set_features(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, "%s received %s\n",
+		   __func__, netdev_cmd_to_name(event));
+
+	if (!(event_dev->priv_flags & IFF_BONDING))
+		return NOTIFY_DONE;
+
+	if (event_dev->flags & IFF_MASTER) {
+		int ret;
+
+		ret = bond_master_netdev_event(event, event_dev);
+		if (ret != NOTIFY_DONE)
+			return ret;
+	}
+
+	if (event_dev->flags & IFF_SLAVE)
+		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 -----------------------------*/
+
+/* Helper to access data in a packet, with or without a backing skb.
+ * If skb is given the data is linearized if necessary via pskb_may_pull.
+ */
+static inline const void *bond_pull_data(struct sk_buff *skb,
+					 const void *data, int hlen, int n)
+{
+	if (likely(n <= hlen))
+		return data;
+	else if (skb && likely(pskb_may_pull(skb, n)))
+		return skb->data;
+
+	return NULL;
+}
+
+/* L2 hash helper */
+static inline u32 bond_eth_hash(struct sk_buff *skb, const void *data, int mhoff, int hlen)
+{
+	struct ethhdr *ep;
+
+	data = bond_pull_data(skb, data, hlen, mhoff + sizeof(struct ethhdr));
+	if (!data)
+		return 0;
+
+	ep = (struct ethhdr *)(data + mhoff);
+	return ep->h_dest[5] ^ ep->h_source[5] ^ be16_to_cpu(ep->h_proto);
+}
+
+static bool bond_flow_ip(struct sk_buff *skb, struct flow_keys *fk, const void *data,
+			 int hlen, __be16 l2_proto, int *nhoff, int *ip_proto, bool l34)
+{
+	const struct ipv6hdr *iph6;
+	const struct iphdr *iph;
+
+	if (l2_proto == htons(ETH_P_IP)) {
+		data = bond_pull_data(skb, data, hlen, *nhoff + sizeof(*iph));
+		if (!data)
+			return false;
+
+		iph = (const struct iphdr *)(data + *nhoff);
+		iph_to_flow_copy_v4addrs(fk, iph);
+		*nhoff += iph->ihl << 2;
+		if (!ip_is_fragment(iph))
+			*ip_proto = iph->protocol;
+	} else if (l2_proto == htons(ETH_P_IPV6)) {
+		data = bond_pull_data(skb, data, hlen, *nhoff + sizeof(*iph6));
+		if (!data)
+			return false;
+
+		iph6 = (const struct ipv6hdr *)(data + *nhoff);
+		iph_to_flow_copy_v6addrs(fk, iph6);
+		*nhoff += sizeof(*iph6);
+		*ip_proto = iph6->nexthdr;
+	} else {
+		return false;
+	}
+
+	if (l34 && *ip_proto >= 0)
+		fk->ports.ports = __skb_flow_get_ports(skb, *nhoff, *ip_proto, data, hlen);
+
+	return true;
+}
+
+static u32 bond_vlan_srcmac_hash(struct sk_buff *skb, const void *data, int mhoff, int hlen)
+{
+	u32 srcmac_vendor = 0, srcmac_dev = 0;
+	struct ethhdr *mac_hdr;
+	u16 vlan = 0;
+	int i;
+
+	data = bond_pull_data(skb, data, hlen, mhoff + sizeof(struct ethhdr));
+	if (!data)
+		return 0;
+	mac_hdr = (struct ethhdr *)(data + mhoff);
+
+	for (i = 0; i < 3; i++)
+		srcmac_vendor = (srcmac_vendor << 8) | mac_hdr->h_source[i];
+
+	for (i = 3; i < ETH_ALEN; i++)
+		srcmac_dev = (srcmac_dev << 8) | mac_hdr->h_source[i];
+
+	if (skb && skb_vlan_tag_present(skb))
+		vlan = skb_vlan_tag_get(skb);
+
+	return vlan ^ srcmac_vendor ^ srcmac_dev;
+}
+
+/* Extract the appropriate headers based on bond's xmit policy */
+static bool bond_flow_dissect(struct bonding *bond, struct sk_buff *skb, const void *data,
+			      __be16 l2_proto, int nhoff, int hlen, struct flow_keys *fk)
+{
+	bool l34 = bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34;
+	int ip_proto = -1;
+
+	switch (bond->params.xmit_policy) {
+	case BOND_XMIT_POLICY_ENCAP23:
+	case BOND_XMIT_POLICY_ENCAP34:
+		memset(fk, 0, sizeof(*fk));
+		return __skb_flow_dissect(NULL, skb, &flow_keys_bonding,
+					  fk, data, l2_proto, nhoff, hlen, 0);
+	default:
+		break;
+	}
+
+	fk->ports.ports = 0;
+	memset(&fk->icmp, 0, sizeof(fk->icmp));
+	if (!bond_flow_ip(skb, fk, data, hlen, l2_proto, &nhoff, &ip_proto, l34))
+		return false;
+
+	/* ICMP error packets contains at least 8 bytes of the header
+	 * of the packet which generated the error. Use this information
+	 * to correlate ICMP error packets within the same flow which
+	 * generated the error.
+	 */
+	if (ip_proto == IPPROTO_ICMP || ip_proto == IPPROTO_ICMPV6) {
+		skb_flow_get_icmp_tci(skb, &fk->icmp, data, nhoff, hlen);
+		if (ip_proto == IPPROTO_ICMP) {
+			if (!icmp_is_err(fk->icmp.type))
+				return true;
+
+			nhoff += sizeof(struct icmphdr);
+		} else if (ip_proto == IPPROTO_ICMPV6) {
+			if (!icmpv6_is_err(fk->icmp.type))
+				return true;
+
+			nhoff += sizeof(struct icmp6hdr);
+		}
+		return bond_flow_ip(skb, fk, data, hlen, l2_proto, &nhoff, &ip_proto, l34);
+	}
+
+	return true;
+}
+
+static u32 bond_ip_hash(u32 hash, struct flow_keys *flow, int xmit_policy)
+{
+	hash ^= (__force u32)flow_get_u32_dst(flow) ^
+		(__force u32)flow_get_u32_src(flow);
+	hash ^= (hash >> 16);
+	hash ^= (hash >> 8);
+
+	/* discard lowest hash bit to deal with the common even ports pattern */
+	if (xmit_policy == BOND_XMIT_POLICY_LAYER34 ||
+		xmit_policy == BOND_XMIT_POLICY_ENCAP34)
+		return hash >> 1;
+
+	return hash;
+}
+
+/* Generate hash based on xmit policy. If @skb is given it is used to linearize
+ * the data as required, but this function can be used without it if the data is
+ * known to be linear (e.g. with xdp_buff).
+ */
+static u32 __bond_xmit_hash(struct bonding *bond, struct sk_buff *skb, const void *data,
+			    __be16 l2_proto, int mhoff, int nhoff, int hlen)
+{
+	struct flow_keys flow;
+	u32 hash;
+
+	if (bond->params.xmit_policy == BOND_XMIT_POLICY_VLAN_SRCMAC)
+		return bond_vlan_srcmac_hash(skb, data, mhoff, hlen);
+
+	if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER2 ||
+	    !bond_flow_dissect(bond, skb, data, l2_proto, nhoff, hlen, &flow))
+		return bond_eth_hash(skb, data, mhoff, hlen);
+
+	if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER23 ||
+	    bond->params.xmit_policy == BOND_XMIT_POLICY_ENCAP23) {
+		hash = bond_eth_hash(skb, data, mhoff, hlen);
+	} else {
+		if (flow.icmp.id)
+			memcpy(&hash, &flow.icmp, sizeof(hash));
+		else
+			memcpy(&hash, &flow.ports.ports, sizeof(hash));
+	}
+
+	return bond_ip_hash(hash, &flow, bond->params.xmit_policy);
+}
+
+/**
+ * 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)
+{
+	if (bond->params.xmit_policy == BOND_XMIT_POLICY_ENCAP34 &&
+	    skb->l4_hash)
+		return skb->hash;
+
+	return __bond_xmit_hash(bond, skb, skb->data, skb->protocol,
+				0, skb_network_offset(skb),
+				skb_headlen(skb));
+}
+
+/**
+ * bond_xmit_hash_xdp - generate a hash value based on the xmit policy
+ * @bond: bonding device
+ * @xdp: buffer to use for headers
+ *
+ * The XDP variant of bond_xmit_hash.
+ */
+static u32 bond_xmit_hash_xdp(struct bonding *bond, struct xdp_buff *xdp)
+{
+	struct ethhdr *eth;
+
+	if (xdp->data + sizeof(struct ethhdr) > xdp->data_end)
+		return 0;
+
+	eth = (struct ethhdr *)xdp->data;
+
+	return __bond_xmit_hash(bond, NULL, xdp->data, eth->h_proto, 0,
+				sizeof(struct ethhdr), xdp->data_end - xdp->data);
+}
+
+/*-------------------------- 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;
+
+	if (BOND_MODE(bond) == BOND_MODE_ROUNDROBIN && !bond->rr_tx_counter) {
+		bond->rr_tx_counter = alloc_percpu(u32);
+		if (!bond->rr_tx_counter)
+			return -ENOMEM;
+	}
+
+	/* 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_rcv_validate;
+	}
+
+	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);
+
+		bond_for_each_slave(bond, slave, iter)
+			dev_mc_add(slave->dev, lacpdu_mcast_addr);
+	}
+
+	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);
+	struct slave *slave;
+
+	bond_work_cancel_all(bond);
+	bond->send_peer_notif = 0;
+	if (bond_is_lb(bond))
+		bond_alb_deinitialize(bond);
+	bond->recv_probe = NULL;
+
+	if (bond_uses_primary(bond)) {
+		rcu_read_lock();
+		slave = rcu_dereference(bond->curr_active_slave);
+		if (slave)
+			bond_hw_addr_flush(bond_dev, slave->dev);
+		rcu_read_unlock();
+	} else {
+		struct list_head *iter;
+
+		bond_for_each_slave(bond, slave, iter)
+			bond_hw_addr_flush(bond_dev, slave->dev);
+	}
+
+	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;
+	}
+}
+
+#ifdef CONFIG_LOCKDEP
+static int bond_get_lowest_level_rcu(struct net_device *dev)
+{
+	struct net_device *ldev, *next, *now, *dev_stack[MAX_NEST_DEV + 1];
+	struct list_head *niter, *iter, *iter_stack[MAX_NEST_DEV + 1];
+	int cur = 0, max = 0;
+
+	now = dev;
+	iter = &dev->adj_list.lower;
+
+	while (1) {
+		next = NULL;
+		while (1) {
+			ldev = netdev_next_lower_dev_rcu(now, &iter);
+			if (!ldev)
+				break;
+
+			next = ldev;
+			niter = &ldev->adj_list.lower;
+			dev_stack[cur] = now;
+			iter_stack[cur++] = iter;
+			if (max <= cur)
+				max = cur;
+			break;
+		}
+
+		if (!next) {
+			if (!cur)
+				return max;
+			next = dev_stack[--cur];
+			niter = iter_stack[cur];
+		}
+
+		now = next;
+		iter = niter;
+	}
+
+	return max;
+}
+#endif
+
+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;
+	int nest_level = 0;
+
+
+	rcu_read_lock();
+#ifdef CONFIG_LOCKDEP
+	nest_level = bond_get_lowest_level_rcu(bond_dev);
+#endif
+
+	spin_lock_nested(&bond->stats_lock, nest_level);
+	memcpy(stats, &bond->bond_stats, sizeof(*stats));
+
+	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));
+	}
+
+	memcpy(&bond->bond_stats, stats, sizeof(*stats));
+	spin_unlock(&bond->stats_lock);
+	rcu_read_unlock();
+}
+
+static int bond_eth_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct mii_ioctl_data *mii = NULL;
+
+	netdev_dbg(bond_dev, "bond_eth_ioctl: cmd=%d\n", cmd);
+
+	switch (cmd) {
+	case SIOCGMIIPHY:
+		mii = if_mii(ifr);
+		if (!mii)
+			return -EINVAL;
+
+		mii->phy_id = 0;
+		fallthrough;
+	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;
+		}
+
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+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 bond_opt_value newval;
+	struct net *net;
+	int res = 0;
+
+	netdev_dbg(bond_dev, "bond_ioctl: cmd=%d\n", cmd);
+
+	switch (cmd) {
+	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 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);
+
+	slave_dbg(bond_dev, slave_dev, "slave_dev=%p:\n", slave_dev);
+
+	if (!slave_dev)
+		return -ENODEV;
+
+	switch (cmd) {
+	case SIOCBONDENSLAVE:
+		res = bond_enslave(bond_dev, slave_dev, NULL);
+		break;
+	case SIOCBONDRELEASE:
+		res = bond_release(bond_dev, slave_dev);
+		break;
+	case SIOCBONDSETHWADDR:
+		res = bond_set_dev_addr(bond_dev, slave_dev);
+		break;
+	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 int bond_siocdevprivate(struct net_device *bond_dev, struct ifreq *ifr,
+			       void __user *data, int cmd)
+{
+	struct ifreq ifrdata = { .ifr_data = data };
+
+	switch (cmd) {
+	case BOND_INFO_QUERY_OLD:
+		return bond_do_ioctl(bond_dev, &ifrdata, SIOCBONDINFOQUERY);
+	case BOND_SLAVE_INFO_QUERY_OLD:
+		return bond_do_ioctl(bond_dev, &ifrdata, SIOCBONDSLAVEINFOQUERY);
+	case BOND_ENSLAVE_OLD:
+		return bond_do_ioctl(bond_dev, ifr, SIOCBONDENSLAVE);
+	case BOND_RELEASE_OLD:
+		return bond_do_ioctl(bond_dev, ifr, SIOCBONDRELEASE);
+	case BOND_SETHWADDR_OLD:
+		return bond_do_ioctl(bond_dev, ifr, SIOCBONDSETHWADDR);
+	case BOND_CHANGE_ACTIVE_OLD:
+		return bond_do_ioctl(bond_dev, ifr, SIOCBONDCHANGEACTIVE);
+	}
+
+	return -EOPNOTSUPP;
+}
+
+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 = 0;
+
+	rcu_read_lock();
+	slave = bond_first_slave_rcu(bond);
+	if (!slave)
+		goto out;
+	slave_ops = slave->dev->netdev_ops;
+	if (!slave_ops->ndo_neigh_setup)
+		goto out;
+
+	/* TODO: find another way [1] to implement this.
+	 * Passing a zeroed structure is fragile,
+	 * but at least we do not pass garbage.
+	 *
+	 * [1] One way would be that ndo_neigh_setup() never touch
+	 *     struct neigh_parms, but propagate the new neigh_setup()
+	 *     back to ___neigh_create() / neigh_parms_alloc()
+	 */
+	memset(&parms, 0, sizeof(parms));
+	ret = slave_ops->ndo_neigh_setup(slave->dev, &parms);
+
+	if (ret)
+		goto out;
+
+	if (parms.neigh_setup)
+		ret = parms.neigh_setup(n);
+out:
+	rcu_read_unlock();
+	return ret;
+}
+
+/* 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) {
+		slave_dbg(bond_dev, slave->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.
+			 */
+			slave_dbg(bond_dev, slave->dev, "err %d setting mtu to %d\n",
+				  res, new_mtu);
+			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)
+			slave_dbg(bond_dev, rollback_slave->dev, "unwind err %d\n",
+				  tmp_res);
+	}
+
+	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, "%s: bond=%p\n", __func__, 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) {
+		slave_dbg(bond_dev, slave->dev, "%s: slave=%p\n",
+			  __func__, slave);
+		res = dev_set_mac_address(slave->dev, addr, NULL);
+		if (res) {
+			/* TODO: consider downing the slave
+			 * and retry ?
+			 * User should expect communications
+			 * breakage anyway until ARP finish
+			 * updating, so...
+			 */
+			slave_dbg(bond_dev, slave->dev, "%s: err %d\n",
+				  __func__, res);
+			goto unwind;
+		}
+	}
+
+	/* success */
+	dev_addr_set(bond_dev, ss->__data);
+	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, NULL);
+		if (tmp_res) {
+			slave_dbg(bond_dev, rollback_slave->dev, "%s: unwind err %d\n",
+				   __func__, tmp_res);
+		}
+	}
+
+	return res;
+}
+
+/**
+ * bond_get_slave_by_id - get xmit slave with slave_id
+ * @bond: bonding device that is transmitting
+ * @slave_id: slave id up to slave_cnt-1 through which to transmit
+ *
+ * This function tries to get slave with slave_id but in case
+ * it fails, it tries to find the first available slave for transmission.
+ */
+static struct slave *bond_get_slave_by_id(struct bonding *bond,
+					  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))
+				return slave;
+		}
+	}
+
+	/* 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))
+			return slave;
+	}
+	/* no slave that can tx has been found */
+	return NULL;
+}
+
+/**
+ * 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 = get_random_u32();
+		break;
+	case 1:
+		slave_id = this_cpu_inc_return(*bond->rr_tx_counter);
+		break;
+	default:
+		reciprocal_packets_per_slave =
+			bond->params.reciprocal_packets_per_slave;
+		slave_id = this_cpu_inc_return(*bond->rr_tx_counter);
+		slave_id = reciprocal_divide(slave_id,
+					     reciprocal_packets_per_slave);
+		break;
+	}
+
+	return slave_id;
+}
+
+static struct slave *bond_xmit_roundrobin_slave_get(struct bonding *bond,
+						    struct sk_buff *skb)
+{
+	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)
+				return slave;
+			return bond_get_slave_by_id(bond, 0);
+		}
+	}
+
+non_igmp:
+	slave_cnt = READ_ONCE(bond->slave_cnt);
+	if (likely(slave_cnt)) {
+		slave_id = bond_rr_gen_slave_id(bond) % slave_cnt;
+		return bond_get_slave_by_id(bond, slave_id);
+	}
+	return NULL;
+}
+
+static struct slave *bond_xdp_xmit_roundrobin_slave_get(struct bonding *bond,
+							struct xdp_buff *xdp)
+{
+	struct slave *slave;
+	int slave_cnt;
+	u32 slave_id;
+	const struct ethhdr *eth;
+	void *data = xdp->data;
+
+	if (data + sizeof(struct ethhdr) > xdp->data_end)
+		goto non_igmp;
+
+	eth = (struct ethhdr *)data;
+	data += sizeof(struct ethhdr);
+
+	/* See comment on IGMP in bond_xmit_roundrobin_slave_get() */
+	if (eth->h_proto == htons(ETH_P_IP)) {
+		const struct iphdr *iph;
+
+		if (data + sizeof(struct iphdr) > xdp->data_end)
+			goto non_igmp;
+
+		iph = (struct iphdr *)data;
+
+		if (iph->protocol == IPPROTO_IGMP) {
+			slave = rcu_dereference(bond->curr_active_slave);
+			if (slave)
+				return slave;
+			return bond_get_slave_by_id(bond, 0);
+		}
+	}
+
+non_igmp:
+	slave_cnt = READ_ONCE(bond->slave_cnt);
+	if (likely(slave_cnt)) {
+		slave_id = bond_rr_gen_slave_id(bond) % slave_cnt;
+		return bond_get_slave_by_id(bond, slave_id);
+	}
+	return NULL;
+}
+
+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;
+
+	slave = bond_xmit_roundrobin_slave_get(bond, skb);
+	if (likely(slave))
+		return bond_dev_queue_xmit(bond, skb, slave->dev);
+
+	return bond_tx_drop(bond_dev, skb);
+}
+
+static struct slave *bond_xmit_activebackup_slave_get(struct bonding *bond)
+{
+	return rcu_dereference(bond->curr_active_slave);
+}
+
+/* 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 = bond_xmit_activebackup_slave_get(bond);
+	if (slave)
+		return bond_dev_queue_xmit(bond, skb, slave->dev);
+
+	return bond_tx_drop(bond_dev, skb);
+}
+
+/* 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);
+}
+
+static void bond_skip_slave(struct bond_up_slave *slaves,
+			    struct slave *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.
+	 */
+	for (idx = 0; slaves && idx < slaves->count; idx++) {
+		if (skipslave == slaves->arr[idx]) {
+			slaves->arr[idx] =
+				slaves->arr[slaves->count - 1];
+			slaves->count--;
+			break;
+		}
+	}
+}
+
+static void bond_set_slave_arr(struct bonding *bond,
+			       struct bond_up_slave *usable_slaves,
+			       struct bond_up_slave *all_slaves)
+{
+	struct bond_up_slave *usable, *all;
+
+	usable = rtnl_dereference(bond->usable_slaves);
+	rcu_assign_pointer(bond->usable_slaves, usable_slaves);
+	kfree_rcu(usable, rcu);
+
+	all = rtnl_dereference(bond->all_slaves);
+	rcu_assign_pointer(bond->all_slaves, all_slaves);
+	kfree_rcu(all, rcu);
+}
+
+static void bond_reset_slave_arr(struct bonding *bond)
+{
+	bond_set_slave_arr(bond, NULL, NULL);
+}
+
+/* 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 bond_up_slave *usable_slaves = NULL, *all_slaves = NULL;
+	struct slave *slave;
+	struct list_head *iter;
+	int agg_id = 0;
+	int ret = 0;
+
+	might_sleep();
+
+	usable_slaves = kzalloc(struct_size(usable_slaves, arr,
+					    bond->slave_cnt), GFP_KERNEL);
+	all_slaves = kzalloc(struct_size(all_slaves, arr,
+					 bond->slave_cnt), GFP_KERNEL);
+	if (!usable_slaves || !all_slaves) {
+		ret = -ENOMEM;
+		goto out;
+	}
+	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+		struct ad_info ad_info;
+
+		spin_lock_bh(&bond->mode_lock);
+		if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
+			spin_unlock_bh(&bond->mode_lock);
+			pr_debug("bond_3ad_get_active_agg_info failed\n");
+			/* No active aggragator means it's not safe to use
+			 * the previous array.
+			 */
+			bond_reset_slave_arr(bond);
+			goto out;
+		}
+		spin_unlock_bh(&bond->mode_lock);
+		agg_id = ad_info.aggregator_id;
+	}
+	bond_for_each_slave(bond, slave, iter) {
+		if (skipslave == slave)
+			continue;
+
+		all_slaves->arr[all_slaves->count++] = slave;
+		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;
+
+		slave_dbg(bond->dev, slave->dev, "Adding slave to tx hash array[%d]\n",
+			  usable_slaves->count);
+
+		usable_slaves->arr[usable_slaves->count++] = slave;
+	}
+
+	bond_set_slave_arr(bond, usable_slaves, all_slaves);
+	return ret;
+out:
+	if (ret != 0 && skipslave) {
+		bond_skip_slave(rtnl_dereference(bond->all_slaves),
+				skipslave);
+		bond_skip_slave(rtnl_dereference(bond->usable_slaves),
+				skipslave);
+	}
+	kfree_rcu(all_slaves, rcu);
+	kfree_rcu(usable_slaves, rcu);
+
+	return ret;
+}
+
+static struct slave *bond_xmit_3ad_xor_slave_get(struct bonding *bond,
+						 struct sk_buff *skb,
+						 struct bond_up_slave *slaves)
+{
+	struct slave *slave;
+	unsigned int count;
+	u32 hash;
+
+	hash = bond_xmit_hash(bond, skb);
+	count = slaves ? READ_ONCE(slaves->count) : 0;
+	if (unlikely(!count))
+		return NULL;
+
+	slave = slaves->arr[hash % count];
+	return slave;
+}
+
+static struct slave *bond_xdp_xmit_3ad_xor_slave_get(struct bonding *bond,
+						     struct xdp_buff *xdp)
+{
+	struct bond_up_slave *slaves;
+	unsigned int count;
+	u32 hash;
+
+	hash = bond_xmit_hash_xdp(bond, xdp);
+	slaves = rcu_dereference(bond->usable_slaves);
+	count = slaves ? READ_ONCE(slaves->count) : 0;
+	if (unlikely(!count))
+		return NULL;
+
+	return slaves->arr[hash % count];
+}
+
+/* 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 bond_up_slave *slaves;
+	struct slave *slave;
+
+	slaves = rcu_dereference(bond->usable_slaves);
+	slave = bond_xmit_3ad_xor_slave_get(bond, skb, slaves);
+	if (likely(slave))
+		return bond_dev_queue_xmit(bond, skb, slave->dev);
+
+	return bond_tx_drop(dev, skb);
+}
+
+/* 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;
+	bool xmit_suc = false;
+	bool skb_used = false;
+
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		struct sk_buff *skb2;
+
+		if (!(bond_slave_is_up(slave) && slave->link == BOND_LINK_UP))
+			continue;
+
+		if (bond_is_last_slave(bond, slave)) {
+			skb2 = skb;
+			skb_used = true;
+		} else {
+			skb2 = skb_clone(skb, GFP_ATOMIC);
+			if (!skb2) {
+				net_err_ratelimited("%s: Error: %s: skb_clone() failed\n",
+						    bond_dev->name, __func__);
+				continue;
+			}
+		}
+
+		if (bond_dev_queue_xmit(bond, skb2, slave->dev) == NETDEV_TX_OK)
+			xmit_suc = true;
+	}
+
+	if (!skb_used)
+		dev_kfree_skb_any(skb);
+
+	if (xmit_suc)
+		return NETDEV_TX_OK;
+
+	dev_core_stats_tx_dropped_inc(bond_dev);
+	return NET_XMIT_DROP;
+}
+
+/*------------------------- 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)
+{
+	/* 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 struct net_device *bond_xmit_get_slave(struct net_device *master_dev,
+					      struct sk_buff *skb,
+					      bool all_slaves)
+{
+	struct bonding *bond = netdev_priv(master_dev);
+	struct bond_up_slave *slaves;
+	struct slave *slave = NULL;
+
+	switch (BOND_MODE(bond)) {
+	case BOND_MODE_ROUNDROBIN:
+		slave = bond_xmit_roundrobin_slave_get(bond, skb);
+		break;
+	case BOND_MODE_ACTIVEBACKUP:
+		slave = bond_xmit_activebackup_slave_get(bond);
+		break;
+	case BOND_MODE_8023AD:
+	case BOND_MODE_XOR:
+		if (all_slaves)
+			slaves = rcu_dereference(bond->all_slaves);
+		else
+			slaves = rcu_dereference(bond->usable_slaves);
+		slave = bond_xmit_3ad_xor_slave_get(bond, skb, slaves);
+		break;
+	case BOND_MODE_BROADCAST:
+		break;
+	case BOND_MODE_ALB:
+		slave = bond_xmit_alb_slave_get(bond, skb);
+		break;
+	case BOND_MODE_TLB:
+		slave = bond_xmit_tlb_slave_get(bond, skb);
+		break;
+	default:
+		/* Should never happen, mode already checked */
+		WARN_ONCE(true, "Unknown bonding mode");
+		break;
+	}
+
+	if (slave)
+		return slave->dev;
+	return NULL;
+}
+
+static void bond_sk_to_flow(struct sock *sk, struct flow_keys *flow)
+{
+	switch (sk->sk_family) {
+#if IS_ENABLED(CONFIG_IPV6)
+	case AF_INET6:
+		if (ipv6_only_sock(sk) ||
+		    ipv6_addr_type(&sk->sk_v6_daddr) != IPV6_ADDR_MAPPED) {
+			flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
+			flow->addrs.v6addrs.src = inet6_sk(sk)->saddr;
+			flow->addrs.v6addrs.dst = sk->sk_v6_daddr;
+			break;
+		}
+		fallthrough;
+#endif
+	default: /* AF_INET */
+		flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
+		flow->addrs.v4addrs.src = inet_sk(sk)->inet_rcv_saddr;
+		flow->addrs.v4addrs.dst = inet_sk(sk)->inet_daddr;
+		break;
+	}
+
+	flow->ports.src = inet_sk(sk)->inet_sport;
+	flow->ports.dst = inet_sk(sk)->inet_dport;
+}
+
+/**
+ * bond_sk_hash_l34 - generate a hash value based on the socket's L3 and L4 fields
+ * @sk: socket to use for headers
+ *
+ * This function will extract the necessary field from the socket and use
+ * them to generate a hash based on the LAYER34 xmit_policy.
+ * Assumes that sk is a TCP or UDP socket.
+ */
+static u32 bond_sk_hash_l34(struct sock *sk)
+{
+	struct flow_keys flow;
+	u32 hash;
+
+	bond_sk_to_flow(sk, &flow);
+
+	/* L4 */
+	memcpy(&hash, &flow.ports.ports, sizeof(hash));
+	/* L3 */
+	return bond_ip_hash(hash, &flow, BOND_XMIT_POLICY_LAYER34);
+}
+
+static struct net_device *__bond_sk_get_lower_dev(struct bonding *bond,
+						  struct sock *sk)
+{
+	struct bond_up_slave *slaves;
+	struct slave *slave;
+	unsigned int count;
+	u32 hash;
+
+	slaves = rcu_dereference(bond->usable_slaves);
+	count = slaves ? READ_ONCE(slaves->count) : 0;
+	if (unlikely(!count))
+		return NULL;
+
+	hash = bond_sk_hash_l34(sk);
+	slave = slaves->arr[hash % count];
+
+	return slave->dev;
+}
+
+static struct net_device *bond_sk_get_lower_dev(struct net_device *dev,
+						struct sock *sk)
+{
+	struct bonding *bond = netdev_priv(dev);
+	struct net_device *lower = NULL;
+
+	rcu_read_lock();
+	if (bond_sk_check(bond))
+		lower = __bond_sk_get_lower_dev(bond, sk);
+	rcu_read_unlock();
+
+	return lower;
+}
+
+#if IS_ENABLED(CONFIG_TLS_DEVICE)
+static netdev_tx_t bond_tls_device_xmit(struct bonding *bond, struct sk_buff *skb,
+					struct net_device *dev)
+{
+	struct net_device *tls_netdev = rcu_dereference(tls_get_ctx(skb->sk)->netdev);
+
+	/* tls_netdev might become NULL, even if tls_is_skb_tx_device_offloaded
+	 * was true, if tls_device_down is running in parallel, but it's OK,
+	 * because bond_get_slave_by_dev has a NULL check.
+	 */
+	if (likely(bond_get_slave_by_dev(bond, tls_netdev)))
+		return bond_dev_queue_xmit(bond, skb, tls_netdev);
+	return bond_tx_drop(dev, skb);
+}
+#endif
+
+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;
+
+#if IS_ENABLED(CONFIG_TLS_DEVICE)
+	if (tls_is_skb_tx_device_offloaded(skb))
+		return bond_tls_device_xmit(bond, skb, dev);
+#endif
+
+	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);
+		return bond_tx_drop(dev, skb);
+	}
+}
+
+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
+		ret = bond_tx_drop(dev, skb);
+	rcu_read_unlock();
+
+	return ret;
+}
+
+static struct net_device *
+bond_xdp_get_xmit_slave(struct net_device *bond_dev, struct xdp_buff *xdp)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct slave *slave;
+
+	/* Caller needs to hold rcu_read_lock() */
+
+	switch (BOND_MODE(bond)) {
+	case BOND_MODE_ROUNDROBIN:
+		slave = bond_xdp_xmit_roundrobin_slave_get(bond, xdp);
+		break;
+
+	case BOND_MODE_ACTIVEBACKUP:
+		slave = bond_xmit_activebackup_slave_get(bond);
+		break;
+
+	case BOND_MODE_8023AD:
+	case BOND_MODE_XOR:
+		slave = bond_xdp_xmit_3ad_xor_slave_get(bond, xdp);
+		break;
+
+	default:
+		/* Should never happen. Mode guarded by bond_xdp_check() */
+		netdev_err(bond_dev, "Unknown bonding mode %d for xdp xmit\n", BOND_MODE(bond));
+		WARN_ON_ONCE(1);
+		return NULL;
+	}
+
+	if (slave)
+		return slave->dev;
+
+	return NULL;
+}
+
+static int bond_xdp_xmit(struct net_device *bond_dev,
+			 int n, struct xdp_frame **frames, u32 flags)
+{
+	int nxmit, err = -ENXIO;
+
+	rcu_read_lock();
+
+	for (nxmit = 0; nxmit < n; nxmit++) {
+		struct xdp_frame *frame = frames[nxmit];
+		struct xdp_frame *frames1[] = {frame};
+		struct net_device *slave_dev;
+		struct xdp_buff xdp;
+
+		xdp_convert_frame_to_buff(frame, &xdp);
+
+		slave_dev = bond_xdp_get_xmit_slave(bond_dev, &xdp);
+		if (!slave_dev) {
+			err = -ENXIO;
+			break;
+		}
+
+		err = slave_dev->netdev_ops->ndo_xdp_xmit(slave_dev, 1, frames1, flags);
+		if (err < 1)
+			break;
+	}
+
+	rcu_read_unlock();
+
+	/* If error happened on the first frame then we can pass the error up, otherwise
+	 * report the number of frames that were xmitted.
+	 */
+	if (err < 0)
+		return (nxmit == 0 ? err : nxmit);
+
+	return nxmit;
+}
+
+static int bond_xdp_set(struct net_device *dev, struct bpf_prog *prog,
+			struct netlink_ext_ack *extack)
+{
+	struct bonding *bond = netdev_priv(dev);
+	struct list_head *iter;
+	struct slave *slave, *rollback_slave;
+	struct bpf_prog *old_prog;
+	struct netdev_bpf xdp = {
+		.command = XDP_SETUP_PROG,
+		.flags   = 0,
+		.prog    = prog,
+		.extack  = extack,
+	};
+	int err;
+
+	ASSERT_RTNL();
+
+	if (!bond_xdp_check(bond))
+		return -EOPNOTSUPP;
+
+	old_prog = bond->xdp_prog;
+	bond->xdp_prog = prog;
+
+	bond_for_each_slave(bond, slave, iter) {
+		struct net_device *slave_dev = slave->dev;
+
+		if (!slave_dev->netdev_ops->ndo_bpf ||
+		    !slave_dev->netdev_ops->ndo_xdp_xmit) {
+			SLAVE_NL_ERR(dev, slave_dev, extack,
+				     "Slave device does not support XDP");
+			err = -EOPNOTSUPP;
+			goto err;
+		}
+
+		if (dev_xdp_prog_count(slave_dev) > 0) {
+			SLAVE_NL_ERR(dev, slave_dev, extack,
+				     "Slave has XDP program loaded, please unload before enslaving");
+			err = -EOPNOTSUPP;
+			goto err;
+		}
+
+		err = slave_dev->netdev_ops->ndo_bpf(slave_dev, &xdp);
+		if (err < 0) {
+			/* ndo_bpf() sets extack error message */
+			slave_err(dev, slave_dev, "Error %d calling ndo_bpf\n", err);
+			goto err;
+		}
+		if (prog)
+			bpf_prog_inc(prog);
+	}
+
+	if (prog) {
+		static_branch_inc(&bpf_master_redirect_enabled_key);
+	} else if (old_prog) {
+		bpf_prog_put(old_prog);
+		static_branch_dec(&bpf_master_redirect_enabled_key);
+	}
+
+	return 0;
+
+err:
+	/* unwind the program changes */
+	bond->xdp_prog = old_prog;
+	xdp.prog = old_prog;
+	xdp.extack = NULL; /* do not overwrite original error */
+
+	bond_for_each_slave(bond, rollback_slave, iter) {
+		struct net_device *slave_dev = rollback_slave->dev;
+		int err_unwind;
+
+		if (slave == rollback_slave)
+			break;
+
+		err_unwind = slave_dev->netdev_ops->ndo_bpf(slave_dev, &xdp);
+		if (err_unwind < 0)
+			slave_err(dev, slave_dev,
+				  "Error %d when unwinding XDP program change\n", err_unwind);
+		else if (xdp.prog)
+			bpf_prog_inc(xdp.prog);
+	}
+	return err;
+}
+
+static int bond_xdp(struct net_device *dev, struct netdev_bpf *xdp)
+{
+	switch (xdp->command) {
+	case XDP_SETUP_PROG:
+		return bond_xdp_set(dev, xdp->prog, xdp->extack);
+	default:
+		return -EINVAL;
+	}
+}
+
+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;
+}
+
+/* Set the BOND_PHC_INDEX flag to notify user space */
+static int bond_set_phc_index_flag(struct kernel_hwtstamp_config *kernel_cfg)
+{
+	struct ifreq *ifr = kernel_cfg->ifr;
+	struct hwtstamp_config cfg;
+
+	if (kernel_cfg->copied_to_user) {
+		/* Lower device has a legacy implementation */
+		if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
+			return -EFAULT;
+
+		cfg.flags |= HWTSTAMP_FLAG_BONDED_PHC_INDEX;
+		if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)))
+			return -EFAULT;
+	} else {
+		kernel_cfg->flags |= HWTSTAMP_FLAG_BONDED_PHC_INDEX;
+	}
+
+	return 0;
+}
+
+static int bond_hwtstamp_get(struct net_device *dev,
+			     struct kernel_hwtstamp_config *cfg)
+{
+	struct bonding *bond = netdev_priv(dev);
+	struct net_device *real_dev;
+	int err;
+
+	real_dev = bond_option_active_slave_get_rcu(bond);
+	if (!real_dev)
+		return -EOPNOTSUPP;
+
+	err = generic_hwtstamp_get_lower(real_dev, cfg);
+	if (err)
+		return err;
+
+	return bond_set_phc_index_flag(cfg);
+}
+
+static int bond_hwtstamp_set(struct net_device *dev,
+			     struct kernel_hwtstamp_config *cfg,
+			     struct netlink_ext_ack *extack)
+{
+	struct bonding *bond = netdev_priv(dev);
+	struct net_device *real_dev;
+	int err;
+
+	if (!(cfg->flags & HWTSTAMP_FLAG_BONDED_PHC_INDEX))
+		return -EOPNOTSUPP;
+
+	real_dev = bond_option_active_slave_get_rcu(bond);
+	if (!real_dev)
+		return -EOPNOTSUPP;
+
+	err = generic_hwtstamp_set_lower(real_dev, cfg, extack);
+	if (err)
+		return err;
+
+	return bond_set_phc_index_flag(cfg);
+}
+
+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)) {
+			bond_update_speed_duplex(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)
+{
+	strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
+	snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), "%d",
+		 BOND_ABI_VERSION);
+}
+
+static int bond_ethtool_get_ts_info(struct net_device *bond_dev,
+				    struct ethtool_ts_info *info)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct ethtool_ts_info ts_info;
+	const struct ethtool_ops *ops;
+	struct net_device *real_dev;
+	bool sw_tx_support = false;
+	struct phy_device *phydev;
+	struct list_head *iter;
+	struct slave *slave;
+	int ret = 0;
+
+	rcu_read_lock();
+	real_dev = bond_option_active_slave_get_rcu(bond);
+	dev_hold(real_dev);
+	rcu_read_unlock();
+
+	if (real_dev) {
+		ops = real_dev->ethtool_ops;
+		phydev = real_dev->phydev;
+
+		if (phy_has_tsinfo(phydev)) {
+			ret = phy_ts_info(phydev, info);
+			goto out;
+		} else if (ops->get_ts_info) {
+			ret = ops->get_ts_info(real_dev, info);
+			goto out;
+		}
+	} else {
+		/* Check if all slaves support software tx timestamping */
+		rcu_read_lock();
+		bond_for_each_slave_rcu(bond, slave, iter) {
+			ret = -1;
+			ops = slave->dev->ethtool_ops;
+			phydev = slave->dev->phydev;
+
+			if (phy_has_tsinfo(phydev))
+				ret = phy_ts_info(phydev, &ts_info);
+			else if (ops->get_ts_info)
+				ret = ops->get_ts_info(slave->dev, &ts_info);
+
+			if (!ret && (ts_info.so_timestamping & SOF_TIMESTAMPING_TX_SOFTWARE)) {
+				sw_tx_support = true;
+				continue;
+			}
+
+			sw_tx_support = false;
+			break;
+		}
+		rcu_read_unlock();
+	}
+
+	ret = 0;
+	info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
+				SOF_TIMESTAMPING_SOFTWARE;
+	if (sw_tx_support)
+		info->so_timestamping |= SOF_TIMESTAMPING_TX_SOFTWARE;
+
+	info->phc_index = -1;
+
+out:
+	dev_put(real_dev);
+	return ret;
+}
+
+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,
+	.get_ts_info		= bond_ethtool_get_ts_info,
+};
+
+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_eth_ioctl		= bond_eth_ioctl,
+	.ndo_siocbond		= bond_do_ioctl,
+	.ndo_siocdevprivate	= bond_siocdevprivate,
+	.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,
+#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,
+	.ndo_get_xmit_slave	= bond_xmit_get_slave,
+	.ndo_sk_get_lower_dev	= bond_sk_get_lower_dev,
+	.ndo_bpf		= bond_xdp,
+	.ndo_xdp_xmit           = bond_xdp_xmit,
+	.ndo_xdp_get_xmit_slave = bond_xdp_get_xmit_slave,
+	.ndo_hwtstamp_get	= bond_hwtstamp_get,
+	.ndo_hwtstamp_set	= bond_hwtstamp_set,
+};
+
+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);
+
+	free_percpu(bond->rr_tx_counter);
+}
+
+void bond_setup(struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+
+	spin_lock_init(&bond->mode_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);
+
+#ifdef CONFIG_XFRM_OFFLOAD
+	/* set up xfrm device ops (only supported in active-backup right now) */
+	bond_dev->xfrmdev_ops = &bond_xfrmdev_ops;
+	INIT_LIST_HEAD(&bond->ipsec_list);
+	spin_lock_init(&bond->ipsec_lock);
+#endif /* CONFIG_XFRM_OFFLOAD */
+
+	/* 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 |
+				NETIF_F_HW_VLAN_STAG_RX |
+				NETIF_F_HW_VLAN_STAG_FILTER;
+
+	bond_dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
+	bond_dev->features |= bond_dev->hw_features;
+	bond_dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
+#ifdef CONFIG_XFRM_OFFLOAD
+	bond_dev->hw_features |= BOND_XFRM_FEATURES;
+	/* Only enable XFRM features if this is an active-backup config */
+	if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
+		bond_dev->features |= BOND_XFRM_FEATURES;
+#endif /* CONFIG_XFRM_OFFLOAD */
+
+	if (bond_xdp_check(bond))
+		bond_dev->xdp_features = NETDEV_XDP_ACT_MASK;
+}
+
+/* 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;
+
+	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");
+
+	bond_set_slave_arr(bond, NULL, NULL);
+
+	list_del(&bond->bond_list);
+
+	bond_debug_unregister(bond);
+}
+
+/*------------------------- Module initialization ---------------------------*/
+
+static int __init 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->missed_max = 2;
+	params->updelay = updelay;
+	params->downdelay = downdelay;
+	params->peer_notif_delay = 0;
+	params->use_carrier = use_carrier;
+	params->lacp_active = 1;
+	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)
+		strscpy_pad(params->primary, primary, sizeof(params->primary));
+
+	memcpy(params->arp_targets, arp_target, sizeof(arp_target));
+#if IS_ENABLED(CONFIG_IPV6)
+	memset(params->ns_targets, 0, sizeof(struct in6_addr) * BOND_MAX_NS_TARGETS);
+#endif
+
+	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->notifier_ctx = false;
+
+	spin_lock_init(&bond->stats_lock);
+	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;
+	int res = -ENOMEM;
+
+	rtnl_lock();
+
+	bond_dev = alloc_netdev_mq(sizeof(struct bonding),
+				   name ? name : "bond%d", NET_NAME_UNKNOWN,
+				   bond_setup, tx_queues);
+	if (!bond_dev)
+		goto out;
+
+	bond = netdev_priv(bond_dev);
+	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);
+		goto out;
+	}
+
+	netif_carrier_off(bond_dev);
+
+	bond_work_init_all(bond);
+
+out:
+	rtnl_unlock();
+	return res;
+}
+
+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_batch(struct list_head *net_list)
+{
+	struct bond_net *bn;
+	struct net *net;
+	LIST_HEAD(list);
+
+	list_for_each_entry(net, net_list, exit_list) {
+		bn = net_generic(net, bond_net_id);
+		bond_destroy_sysfs(bn);
+	}
+
+	/* Kill off any bonds created after unregistering bond rtnl ops */
+	rtnl_lock();
+	list_for_each_entry(net, net_list, exit_list) {
+		struct bonding *bond, *tmp_bond;
+
+		bn = net_generic(net, bond_net_id);
+		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();
+
+	list_for_each_entry(net, net_list, exit_list) {
+		bn = net_generic(net, bond_net_id);
+		bond_destroy_proc_dir(bn);
+	}
+}
+
+static struct pernet_operations bond_net_ops = {
+	.init = bond_net_init,
+	.exit_batch = bond_net_exit_batch,
+	.id   = &bond_net_id,
+	.size = sizeof(struct bond_net),
+};
+
+static int __init bonding_init(void)
+{
+	int i;
+	int res;
+
+	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;
+	}
+
+	skb_flow_dissector_init(&flow_keys_bonding,
+				flow_keys_bonding_keys,
+				ARRAY_SIZE(flow_keys_bonding_keys));
+
+	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_DESCRIPTION(DRV_DESCRIPTION);
+MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
diff --git a/drivers/net/bonding/bond_netlink.c b/drivers/net/bonding/bond_netlink.c
new file mode 100644
index 0000000000..27cbe148f0
--- /dev/null
+++ b/drivers/net/bonding/bond_netlink.c
@@ -0,0 +1,925 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * drivers/net/bond/bond_netlink.c - Netlink interface for bonding
+ * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
+ * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/if_link.h>
+#include <linux/if_ether.h>
+#include <net/netlink.h>
+#include <net/rtnetlink.h>
+#include <net/bonding.h>
+#include <net/ipv6.h>
+
+static size_t bond_get_slave_size(const struct net_device *bond_dev,
+				  const struct net_device *slave_dev)
+{
+	return nla_total_size(sizeof(u8)) +	/* IFLA_BOND_SLAVE_STATE */
+		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_SLAVE_MII_STATUS */
+		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_SLAVE_LINK_FAILURE_COUNT */
+		nla_total_size(MAX_ADDR_LEN) +	/* IFLA_BOND_SLAVE_PERM_HWADDR */
+		nla_total_size(sizeof(u16)) +	/* IFLA_BOND_SLAVE_QUEUE_ID */
+		nla_total_size(sizeof(u16)) +	/* IFLA_BOND_SLAVE_AD_AGGREGATOR_ID */
+		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE */
+		nla_total_size(sizeof(u16)) +	/* IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE */
+		nla_total_size(sizeof(s32)) +	/* IFLA_BOND_SLAVE_PRIO */
+		0;
+}
+
+static int bond_fill_slave_info(struct sk_buff *skb,
+				const struct net_device *bond_dev,
+				const struct net_device *slave_dev)
+{
+	struct slave *slave = bond_slave_get_rtnl(slave_dev);
+
+	if (nla_put_u8(skb, IFLA_BOND_SLAVE_STATE, bond_slave_state(slave)))
+		goto nla_put_failure;
+
+	if (nla_put_u8(skb, IFLA_BOND_SLAVE_MII_STATUS, slave->link))
+		goto nla_put_failure;
+
+	if (nla_put_u32(skb, IFLA_BOND_SLAVE_LINK_FAILURE_COUNT,
+			slave->link_failure_count))
+		goto nla_put_failure;
+
+	if (nla_put(skb, IFLA_BOND_SLAVE_PERM_HWADDR,
+		    slave_dev->addr_len, slave->perm_hwaddr))
+		goto nla_put_failure;
+
+	if (nla_put_u16(skb, IFLA_BOND_SLAVE_QUEUE_ID, slave->queue_id))
+		goto nla_put_failure;
+
+	if (nla_put_s32(skb, IFLA_BOND_SLAVE_PRIO, slave->prio))
+		goto nla_put_failure;
+
+	if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
+		const struct aggregator *agg;
+		const struct port *ad_port;
+
+		ad_port = &SLAVE_AD_INFO(slave)->port;
+		agg = SLAVE_AD_INFO(slave)->port.aggregator;
+		if (agg) {
+			if (nla_put_u16(skb, IFLA_BOND_SLAVE_AD_AGGREGATOR_ID,
+					agg->aggregator_identifier))
+				goto nla_put_failure;
+			if (nla_put_u8(skb,
+				       IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE,
+				       ad_port->actor_oper_port_state))
+				goto nla_put_failure;
+			if (nla_put_u16(skb,
+					IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE,
+					ad_port->partner_oper.port_state))
+				goto nla_put_failure;
+		}
+	}
+
+	return 0;
+
+nla_put_failure:
+	return -EMSGSIZE;
+}
+
+/* Limit the max delay range to 300s */
+static struct netlink_range_validation delay_range = {
+	.max = 300000,
+};
+
+static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = {
+	[IFLA_BOND_MODE]		= { .type = NLA_U8 },
+	[IFLA_BOND_ACTIVE_SLAVE]	= { .type = NLA_U32 },
+	[IFLA_BOND_MIIMON]		= { .type = NLA_U32 },
+	[IFLA_BOND_UPDELAY]		= { .type = NLA_U32 },
+	[IFLA_BOND_DOWNDELAY]		= { .type = NLA_U32 },
+	[IFLA_BOND_USE_CARRIER]		= { .type = NLA_U8 },
+	[IFLA_BOND_ARP_INTERVAL]	= { .type = NLA_U32 },
+	[IFLA_BOND_ARP_IP_TARGET]	= { .type = NLA_NESTED },
+	[IFLA_BOND_ARP_VALIDATE]	= { .type = NLA_U32 },
+	[IFLA_BOND_ARP_ALL_TARGETS]	= { .type = NLA_U32 },
+	[IFLA_BOND_PRIMARY]		= { .type = NLA_U32 },
+	[IFLA_BOND_PRIMARY_RESELECT]	= { .type = NLA_U8 },
+	[IFLA_BOND_FAIL_OVER_MAC]	= { .type = NLA_U8 },
+	[IFLA_BOND_XMIT_HASH_POLICY]	= { .type = NLA_U8 },
+	[IFLA_BOND_RESEND_IGMP]		= { .type = NLA_U32 },
+	[IFLA_BOND_NUM_PEER_NOTIF]	= { .type = NLA_U8 },
+	[IFLA_BOND_ALL_SLAVES_ACTIVE]	= { .type = NLA_U8 },
+	[IFLA_BOND_MIN_LINKS]		= { .type = NLA_U32 },
+	[IFLA_BOND_LP_INTERVAL]		= { .type = NLA_U32 },
+	[IFLA_BOND_PACKETS_PER_SLAVE]	= { .type = NLA_U32 },
+	[IFLA_BOND_AD_LACP_ACTIVE]	= { .type = NLA_U8 },
+	[IFLA_BOND_AD_LACP_RATE]	= { .type = NLA_U8 },
+	[IFLA_BOND_AD_SELECT]		= { .type = NLA_U8 },
+	[IFLA_BOND_AD_INFO]		= { .type = NLA_NESTED },
+	[IFLA_BOND_AD_ACTOR_SYS_PRIO]	= { .type = NLA_U16 },
+	[IFLA_BOND_AD_USER_PORT_KEY]	= { .type = NLA_U16 },
+	[IFLA_BOND_AD_ACTOR_SYSTEM]	= { .type = NLA_BINARY,
+					    .len  = ETH_ALEN },
+	[IFLA_BOND_TLB_DYNAMIC_LB]	= { .type = NLA_U8 },
+	[IFLA_BOND_PEER_NOTIF_DELAY]    = NLA_POLICY_FULL_RANGE(NLA_U32, &delay_range),
+	[IFLA_BOND_MISSED_MAX]		= { .type = NLA_U8 },
+	[IFLA_BOND_NS_IP6_TARGET]	= { .type = NLA_NESTED },
+};
+
+static const struct nla_policy bond_slave_policy[IFLA_BOND_SLAVE_MAX + 1] = {
+	[IFLA_BOND_SLAVE_QUEUE_ID]	= { .type = NLA_U16 },
+	[IFLA_BOND_SLAVE_PRIO]		= { .type = NLA_S32 },
+};
+
+static int bond_validate(struct nlattr *tb[], struct nlattr *data[],
+			 struct netlink_ext_ack *extack)
+{
+	if (tb[IFLA_ADDRESS]) {
+		if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
+			return -EINVAL;
+		if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
+			return -EADDRNOTAVAIL;
+	}
+	return 0;
+}
+
+static int bond_slave_changelink(struct net_device *bond_dev,
+				 struct net_device *slave_dev,
+				 struct nlattr *tb[], struct nlattr *data[],
+				 struct netlink_ext_ack *extack)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct bond_opt_value newval;
+	int err;
+
+	if (!data)
+		return 0;
+
+	if (data[IFLA_BOND_SLAVE_QUEUE_ID]) {
+		u16 queue_id = nla_get_u16(data[IFLA_BOND_SLAVE_QUEUE_ID]);
+		char queue_id_str[IFNAMSIZ + 7];
+
+		/* queue_id option setting expects slave_name:queue_id */
+		snprintf(queue_id_str, sizeof(queue_id_str), "%s:%u\n",
+			 slave_dev->name, queue_id);
+		bond_opt_initstr(&newval, queue_id_str);
+		err = __bond_opt_set(bond, BOND_OPT_QUEUE_ID, &newval,
+				     data[IFLA_BOND_SLAVE_QUEUE_ID], extack);
+		if (err)
+			return err;
+	}
+
+	if (data[IFLA_BOND_SLAVE_PRIO]) {
+		int prio = nla_get_s32(data[IFLA_BOND_SLAVE_PRIO]);
+
+		bond_opt_slave_initval(&newval, &slave_dev, prio);
+		err = __bond_opt_set(bond, BOND_OPT_PRIO, &newval,
+				     data[IFLA_BOND_SLAVE_PRIO], extack);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+static int bond_changelink(struct net_device *bond_dev, struct nlattr *tb[],
+			   struct nlattr *data[],
+			   struct netlink_ext_ack *extack)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	struct bond_opt_value newval;
+	int miimon = 0;
+	int err;
+
+	if (!data)
+		return 0;
+
+	if (data[IFLA_BOND_MODE]) {
+		int mode = nla_get_u8(data[IFLA_BOND_MODE]);
+
+		bond_opt_initval(&newval, mode);
+		err = __bond_opt_set(bond, BOND_OPT_MODE, &newval,
+				     data[IFLA_BOND_MODE], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_ACTIVE_SLAVE]) {
+		int ifindex = nla_get_u32(data[IFLA_BOND_ACTIVE_SLAVE]);
+		struct net_device *slave_dev;
+		char *active_slave = "";
+
+		if (ifindex != 0) {
+			slave_dev = __dev_get_by_index(dev_net(bond_dev),
+						       ifindex);
+			if (!slave_dev)
+				return -ENODEV;
+			active_slave = slave_dev->name;
+		}
+		bond_opt_initstr(&newval, active_slave);
+		err = __bond_opt_set(bond, BOND_OPT_ACTIVE_SLAVE, &newval,
+				     data[IFLA_BOND_ACTIVE_SLAVE], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_MIIMON]) {
+		miimon = nla_get_u32(data[IFLA_BOND_MIIMON]);
+
+		bond_opt_initval(&newval, miimon);
+		err = __bond_opt_set(bond, BOND_OPT_MIIMON, &newval,
+				     data[IFLA_BOND_MIIMON], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_UPDELAY]) {
+		int updelay = nla_get_u32(data[IFLA_BOND_UPDELAY]);
+
+		bond_opt_initval(&newval, updelay);
+		err = __bond_opt_set(bond, BOND_OPT_UPDELAY, &newval,
+				     data[IFLA_BOND_UPDELAY], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_DOWNDELAY]) {
+		int downdelay = nla_get_u32(data[IFLA_BOND_DOWNDELAY]);
+
+		bond_opt_initval(&newval, downdelay);
+		err = __bond_opt_set(bond, BOND_OPT_DOWNDELAY, &newval,
+				     data[IFLA_BOND_DOWNDELAY], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_PEER_NOTIF_DELAY]) {
+		int delay = nla_get_u32(data[IFLA_BOND_PEER_NOTIF_DELAY]);
+
+		bond_opt_initval(&newval, delay);
+		err = __bond_opt_set(bond, BOND_OPT_PEER_NOTIF_DELAY, &newval,
+				     data[IFLA_BOND_PEER_NOTIF_DELAY], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_USE_CARRIER]) {
+		int use_carrier = nla_get_u8(data[IFLA_BOND_USE_CARRIER]);
+
+		bond_opt_initval(&newval, use_carrier);
+		err = __bond_opt_set(bond, BOND_OPT_USE_CARRIER, &newval,
+				     data[IFLA_BOND_USE_CARRIER], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_ARP_INTERVAL]) {
+		int arp_interval = nla_get_u32(data[IFLA_BOND_ARP_INTERVAL]);
+
+		if (arp_interval && miimon) {
+			NL_SET_ERR_MSG_ATTR(extack, data[IFLA_BOND_ARP_INTERVAL],
+					    "ARP monitoring cannot be used with MII monitoring");
+			return -EINVAL;
+		}
+
+		bond_opt_initval(&newval, arp_interval);
+		err = __bond_opt_set(bond, BOND_OPT_ARP_INTERVAL, &newval,
+				     data[IFLA_BOND_ARP_INTERVAL], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_ARP_IP_TARGET]) {
+		struct nlattr *attr;
+		int i = 0, rem;
+
+		bond_option_arp_ip_targets_clear(bond);
+		nla_for_each_nested(attr, data[IFLA_BOND_ARP_IP_TARGET], rem) {
+			__be32 target;
+
+			if (nla_len(attr) < sizeof(target))
+				return -EINVAL;
+
+			target = nla_get_be32(attr);
+
+			bond_opt_initval(&newval, (__force u64)target);
+			err = __bond_opt_set(bond, BOND_OPT_ARP_TARGETS,
+					     &newval,
+					     data[IFLA_BOND_ARP_IP_TARGET],
+					     extack);
+			if (err)
+				break;
+			i++;
+		}
+		if (i == 0 && bond->params.arp_interval)
+			netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
+		if (err)
+			return err;
+	}
+#if IS_ENABLED(CONFIG_IPV6)
+	if (data[IFLA_BOND_NS_IP6_TARGET]) {
+		struct nlattr *attr;
+		int i = 0, rem;
+
+		bond_option_ns_ip6_targets_clear(bond);
+		nla_for_each_nested(attr, data[IFLA_BOND_NS_IP6_TARGET], rem) {
+			struct in6_addr addr6;
+
+			if (nla_len(attr) < sizeof(addr6)) {
+				NL_SET_ERR_MSG(extack, "Invalid IPv6 address");
+				return -EINVAL;
+			}
+
+			addr6 = nla_get_in6_addr(attr);
+
+			bond_opt_initextra(&newval, &addr6, sizeof(addr6));
+			err = __bond_opt_set(bond, BOND_OPT_NS_TARGETS,
+					     &newval,
+					     data[IFLA_BOND_NS_IP6_TARGET],
+					     extack);
+			if (err)
+				break;
+			i++;
+		}
+		if (i == 0 && bond->params.arp_interval)
+			netdev_warn(bond->dev, "Removing last ns target with arp_interval on\n");
+		if (err)
+			return err;
+	}
+#endif
+	if (data[IFLA_BOND_ARP_VALIDATE]) {
+		int arp_validate = nla_get_u32(data[IFLA_BOND_ARP_VALIDATE]);
+
+		if (arp_validate && miimon) {
+			NL_SET_ERR_MSG_ATTR(extack, data[IFLA_BOND_ARP_INTERVAL],
+					    "ARP validating cannot be used with MII monitoring");
+			return -EINVAL;
+		}
+
+		bond_opt_initval(&newval, arp_validate);
+		err = __bond_opt_set(bond, BOND_OPT_ARP_VALIDATE, &newval,
+				     data[IFLA_BOND_ARP_VALIDATE], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_ARP_ALL_TARGETS]) {
+		int arp_all_targets =
+			nla_get_u32(data[IFLA_BOND_ARP_ALL_TARGETS]);
+
+		bond_opt_initval(&newval, arp_all_targets);
+		err = __bond_opt_set(bond, BOND_OPT_ARP_ALL_TARGETS, &newval,
+				     data[IFLA_BOND_ARP_ALL_TARGETS], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_PRIMARY]) {
+		int ifindex = nla_get_u32(data[IFLA_BOND_PRIMARY]);
+		struct net_device *dev;
+		char *primary = "";
+
+		dev = __dev_get_by_index(dev_net(bond_dev), ifindex);
+		if (dev)
+			primary = dev->name;
+
+		bond_opt_initstr(&newval, primary);
+		err = __bond_opt_set(bond, BOND_OPT_PRIMARY, &newval,
+				     data[IFLA_BOND_PRIMARY], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_PRIMARY_RESELECT]) {
+		int primary_reselect =
+			nla_get_u8(data[IFLA_BOND_PRIMARY_RESELECT]);
+
+		bond_opt_initval(&newval, primary_reselect);
+		err = __bond_opt_set(bond, BOND_OPT_PRIMARY_RESELECT, &newval,
+				     data[IFLA_BOND_PRIMARY_RESELECT], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_FAIL_OVER_MAC]) {
+		int fail_over_mac =
+			nla_get_u8(data[IFLA_BOND_FAIL_OVER_MAC]);
+
+		bond_opt_initval(&newval, fail_over_mac);
+		err = __bond_opt_set(bond, BOND_OPT_FAIL_OVER_MAC, &newval,
+				     data[IFLA_BOND_FAIL_OVER_MAC], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_XMIT_HASH_POLICY]) {
+		int xmit_hash_policy =
+			nla_get_u8(data[IFLA_BOND_XMIT_HASH_POLICY]);
+
+		bond_opt_initval(&newval, xmit_hash_policy);
+		err = __bond_opt_set(bond, BOND_OPT_XMIT_HASH, &newval,
+				     data[IFLA_BOND_XMIT_HASH_POLICY], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_RESEND_IGMP]) {
+		int resend_igmp =
+			nla_get_u32(data[IFLA_BOND_RESEND_IGMP]);
+
+		bond_opt_initval(&newval, resend_igmp);
+		err = __bond_opt_set(bond, BOND_OPT_RESEND_IGMP, &newval,
+				     data[IFLA_BOND_RESEND_IGMP], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_NUM_PEER_NOTIF]) {
+		int num_peer_notif =
+			nla_get_u8(data[IFLA_BOND_NUM_PEER_NOTIF]);
+
+		bond_opt_initval(&newval, num_peer_notif);
+		err = __bond_opt_set(bond, BOND_OPT_NUM_PEER_NOTIF, &newval,
+				     data[IFLA_BOND_NUM_PEER_NOTIF], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_ALL_SLAVES_ACTIVE]) {
+		int all_slaves_active =
+			nla_get_u8(data[IFLA_BOND_ALL_SLAVES_ACTIVE]);
+
+		bond_opt_initval(&newval, all_slaves_active);
+		err = __bond_opt_set(bond, BOND_OPT_ALL_SLAVES_ACTIVE, &newval,
+				     data[IFLA_BOND_ALL_SLAVES_ACTIVE], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_MIN_LINKS]) {
+		int min_links =
+			nla_get_u32(data[IFLA_BOND_MIN_LINKS]);
+
+		bond_opt_initval(&newval, min_links);
+		err = __bond_opt_set(bond, BOND_OPT_MINLINKS, &newval,
+				     data[IFLA_BOND_MIN_LINKS], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_LP_INTERVAL]) {
+		int lp_interval =
+			nla_get_u32(data[IFLA_BOND_LP_INTERVAL]);
+
+		bond_opt_initval(&newval, lp_interval);
+		err = __bond_opt_set(bond, BOND_OPT_LP_INTERVAL, &newval,
+				     data[IFLA_BOND_LP_INTERVAL], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_PACKETS_PER_SLAVE]) {
+		int packets_per_slave =
+			nla_get_u32(data[IFLA_BOND_PACKETS_PER_SLAVE]);
+
+		bond_opt_initval(&newval, packets_per_slave);
+		err = __bond_opt_set(bond, BOND_OPT_PACKETS_PER_SLAVE, &newval,
+				     data[IFLA_BOND_PACKETS_PER_SLAVE], extack);
+		if (err)
+			return err;
+	}
+
+	if (data[IFLA_BOND_AD_LACP_ACTIVE]) {
+		int lacp_active = nla_get_u8(data[IFLA_BOND_AD_LACP_ACTIVE]);
+
+		bond_opt_initval(&newval, lacp_active);
+		err = __bond_opt_set(bond, BOND_OPT_LACP_ACTIVE, &newval,
+				     data[IFLA_BOND_AD_LACP_ACTIVE], extack);
+		if (err)
+			return err;
+	}
+
+	if (data[IFLA_BOND_AD_LACP_RATE]) {
+		int lacp_rate =
+			nla_get_u8(data[IFLA_BOND_AD_LACP_RATE]);
+
+		bond_opt_initval(&newval, lacp_rate);
+		err = __bond_opt_set(bond, BOND_OPT_LACP_RATE, &newval,
+				     data[IFLA_BOND_AD_LACP_RATE], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_AD_SELECT]) {
+		int ad_select =
+			nla_get_u8(data[IFLA_BOND_AD_SELECT]);
+
+		bond_opt_initval(&newval, ad_select);
+		err = __bond_opt_set(bond, BOND_OPT_AD_SELECT, &newval,
+				     data[IFLA_BOND_AD_SELECT], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_AD_ACTOR_SYS_PRIO]) {
+		int actor_sys_prio =
+			nla_get_u16(data[IFLA_BOND_AD_ACTOR_SYS_PRIO]);
+
+		bond_opt_initval(&newval, actor_sys_prio);
+		err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYS_PRIO, &newval,
+				     data[IFLA_BOND_AD_ACTOR_SYS_PRIO], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_AD_USER_PORT_KEY]) {
+		int port_key =
+			nla_get_u16(data[IFLA_BOND_AD_USER_PORT_KEY]);
+
+		bond_opt_initval(&newval, port_key);
+		err = __bond_opt_set(bond, BOND_OPT_AD_USER_PORT_KEY, &newval,
+				     data[IFLA_BOND_AD_USER_PORT_KEY], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_AD_ACTOR_SYSTEM]) {
+		if (nla_len(data[IFLA_BOND_AD_ACTOR_SYSTEM]) != ETH_ALEN)
+			return -EINVAL;
+
+		bond_opt_initval(&newval,
+				 nla_get_u64(data[IFLA_BOND_AD_ACTOR_SYSTEM]));
+		err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYSTEM, &newval,
+				     data[IFLA_BOND_AD_ACTOR_SYSTEM], extack);
+		if (err)
+			return err;
+	}
+	if (data[IFLA_BOND_TLB_DYNAMIC_LB]) {
+		int dynamic_lb = nla_get_u8(data[IFLA_BOND_TLB_DYNAMIC_LB]);
+
+		bond_opt_initval(&newval, dynamic_lb);
+		err = __bond_opt_set(bond, BOND_OPT_TLB_DYNAMIC_LB, &newval,
+				     data[IFLA_BOND_TLB_DYNAMIC_LB], extack);
+		if (err)
+			return err;
+	}
+
+	if (data[IFLA_BOND_MISSED_MAX]) {
+		int missed_max = nla_get_u8(data[IFLA_BOND_MISSED_MAX]);
+
+		bond_opt_initval(&newval, missed_max);
+		err = __bond_opt_set(bond, BOND_OPT_MISSED_MAX, &newval,
+				     data[IFLA_BOND_MISSED_MAX], extack);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+static int bond_newlink(struct net *src_net, struct net_device *bond_dev,
+			struct nlattr *tb[], struct nlattr *data[],
+			struct netlink_ext_ack *extack)
+{
+	int err;
+
+	err = bond_changelink(bond_dev, tb, data, extack);
+	if (err < 0)
+		return err;
+
+	err = register_netdevice(bond_dev);
+	if (!err) {
+		struct bonding *bond = netdev_priv(bond_dev);
+
+		netif_carrier_off(bond_dev);
+		bond_work_init_all(bond);
+	}
+
+	return err;
+}
+
+static size_t bond_get_size(const struct net_device *bond_dev)
+{
+	return nla_total_size(sizeof(u8)) +	/* IFLA_BOND_MODE */
+		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_ACTIVE_SLAVE */
+		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_MIIMON */
+		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_UPDELAY */
+		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_DOWNDELAY */
+		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_USE_CARRIER */
+		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_ARP_INTERVAL */
+						/* IFLA_BOND_ARP_IP_TARGET */
+		nla_total_size(sizeof(struct nlattr)) +
+		nla_total_size(sizeof(u32)) * BOND_MAX_ARP_TARGETS +
+		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_ARP_VALIDATE */
+		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_ARP_ALL_TARGETS */
+		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_PRIMARY */
+		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_PRIMARY_RESELECT */
+		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_FAIL_OVER_MAC */
+		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_XMIT_HASH_POLICY */
+		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_RESEND_IGMP */
+		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_NUM_PEER_NOTIF */
+		nla_total_size(sizeof(u8)) +   /* IFLA_BOND_ALL_SLAVES_ACTIVE */
+		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_MIN_LINKS */
+		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_LP_INTERVAL */
+		nla_total_size(sizeof(u32)) +  /* IFLA_BOND_PACKETS_PER_SLAVE */
+		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_AD_LACP_ACTIVE */
+		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_AD_LACP_RATE */
+		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_AD_SELECT */
+		nla_total_size(sizeof(struct nlattr)) + /* IFLA_BOND_AD_INFO */
+		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_AGGREGATOR */
+		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_NUM_PORTS */
+		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_ACTOR_KEY */
+		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_PARTNER_KEY*/
+		nla_total_size(ETH_ALEN) +    /* IFLA_BOND_AD_INFO_PARTNER_MAC*/
+		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_ACTOR_SYS_PRIO */
+		nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_USER_PORT_KEY */
+		nla_total_size(ETH_ALEN) + /* IFLA_BOND_AD_ACTOR_SYSTEM */
+		nla_total_size(sizeof(u8)) + /* IFLA_BOND_TLB_DYNAMIC_LB */
+		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_PEER_NOTIF_DELAY */
+		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_MISSED_MAX */
+						/* IFLA_BOND_NS_IP6_TARGET */
+		nla_total_size(sizeof(struct nlattr)) +
+		nla_total_size(sizeof(struct in6_addr)) * BOND_MAX_NS_TARGETS +
+		0;
+}
+
+static int bond_option_active_slave_get_ifindex(struct bonding *bond)
+{
+	const struct net_device *slave;
+	int ifindex;
+
+	rcu_read_lock();
+	slave = bond_option_active_slave_get_rcu(bond);
+	ifindex = slave ? slave->ifindex : 0;
+	rcu_read_unlock();
+	return ifindex;
+}
+
+static int bond_fill_info(struct sk_buff *skb,
+			  const struct net_device *bond_dev)
+{
+	struct bonding *bond = netdev_priv(bond_dev);
+	unsigned int packets_per_slave;
+	int ifindex, i, targets_added;
+	struct nlattr *targets;
+	struct slave *primary;
+
+	if (nla_put_u8(skb, IFLA_BOND_MODE, BOND_MODE(bond)))
+		goto nla_put_failure;
+
+	ifindex = bond_option_active_slave_get_ifindex(bond);
+	if (ifindex && nla_put_u32(skb, IFLA_BOND_ACTIVE_SLAVE, ifindex))
+		goto nla_put_failure;
+
+	if (nla_put_u32(skb, IFLA_BOND_MIIMON, bond->params.miimon))
+		goto nla_put_failure;
+
+	if (nla_put_u32(skb, IFLA_BOND_UPDELAY,
+			bond->params.updelay * bond->params.miimon))
+		goto nla_put_failure;
+
+	if (nla_put_u32(skb, IFLA_BOND_DOWNDELAY,
+			bond->params.downdelay * bond->params.miimon))
+		goto nla_put_failure;
+
+	if (nla_put_u32(skb, IFLA_BOND_PEER_NOTIF_DELAY,
+			bond->params.peer_notif_delay * bond->params.miimon))
+		goto nla_put_failure;
+
+	if (nla_put_u8(skb, IFLA_BOND_USE_CARRIER, bond->params.use_carrier))
+		goto nla_put_failure;
+
+	if (nla_put_u32(skb, IFLA_BOND_ARP_INTERVAL, bond->params.arp_interval))
+		goto nla_put_failure;
+
+	targets = nla_nest_start_noflag(skb, IFLA_BOND_ARP_IP_TARGET);
+	if (!targets)
+		goto nla_put_failure;
+
+	targets_added = 0;
+	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
+		if (bond->params.arp_targets[i]) {
+			if (nla_put_be32(skb, i, bond->params.arp_targets[i]))
+				goto nla_put_failure;
+			targets_added = 1;
+		}
+	}
+
+	if (targets_added)
+		nla_nest_end(skb, targets);
+	else
+		nla_nest_cancel(skb, targets);
+
+	if (nla_put_u32(skb, IFLA_BOND_ARP_VALIDATE, bond->params.arp_validate))
+		goto nla_put_failure;
+
+	if (nla_put_u32(skb, IFLA_BOND_ARP_ALL_TARGETS,
+			bond->params.arp_all_targets))
+		goto nla_put_failure;
+
+#if IS_ENABLED(CONFIG_IPV6)
+	targets = nla_nest_start(skb, IFLA_BOND_NS_IP6_TARGET);
+	if (!targets)
+		goto nla_put_failure;
+
+	targets_added = 0;
+	for (i = 0; i < BOND_MAX_NS_TARGETS; i++) {
+		if (!ipv6_addr_any(&bond->params.ns_targets[i])) {
+			if (nla_put_in6_addr(skb, i, &bond->params.ns_targets[i]))
+				goto nla_put_failure;
+			targets_added = 1;
+		}
+	}
+
+	if (targets_added)
+		nla_nest_end(skb, targets);
+	else
+		nla_nest_cancel(skb, targets);
+#endif
+
+	primary = rtnl_dereference(bond->primary_slave);
+	if (primary &&
+	    nla_put_u32(skb, IFLA_BOND_PRIMARY, primary->dev->ifindex))
+		goto nla_put_failure;
+
+	if (nla_put_u8(skb, IFLA_BOND_PRIMARY_RESELECT,
+		       bond->params.primary_reselect))
+		goto nla_put_failure;
+
+	if (nla_put_u8(skb, IFLA_BOND_FAIL_OVER_MAC,
+		       bond->params.fail_over_mac))
+		goto nla_put_failure;
+
+	if (nla_put_u8(skb, IFLA_BOND_XMIT_HASH_POLICY,
+		       bond->params.xmit_policy))
+		goto nla_put_failure;
+
+	if (nla_put_u32(skb, IFLA_BOND_RESEND_IGMP,
+			bond->params.resend_igmp))
+		goto nla_put_failure;
+
+	if (nla_put_u8(skb, IFLA_BOND_NUM_PEER_NOTIF,
+		       bond->params.num_peer_notif))
+		goto nla_put_failure;
+
+	if (nla_put_u8(skb, IFLA_BOND_ALL_SLAVES_ACTIVE,
+		       bond->params.all_slaves_active))
+		goto nla_put_failure;
+
+	if (nla_put_u32(skb, IFLA_BOND_MIN_LINKS,
+			bond->params.min_links))
+		goto nla_put_failure;
+
+	if (nla_put_u32(skb, IFLA_BOND_LP_INTERVAL,
+			bond->params.lp_interval))
+		goto nla_put_failure;
+
+	packets_per_slave = bond->params.packets_per_slave;
+	if (nla_put_u32(skb, IFLA_BOND_PACKETS_PER_SLAVE,
+			packets_per_slave))
+		goto nla_put_failure;
+
+	if (nla_put_u8(skb, IFLA_BOND_AD_LACP_ACTIVE,
+		       bond->params.lacp_active))
+		goto nla_put_failure;
+
+	if (nla_put_u8(skb, IFLA_BOND_AD_LACP_RATE,
+		       bond->params.lacp_fast))
+		goto nla_put_failure;
+
+	if (nla_put_u8(skb, IFLA_BOND_AD_SELECT,
+		       bond->params.ad_select))
+		goto nla_put_failure;
+
+	if (nla_put_u8(skb, IFLA_BOND_TLB_DYNAMIC_LB,
+		       bond->params.tlb_dynamic_lb))
+		goto nla_put_failure;
+
+	if (nla_put_u8(skb, IFLA_BOND_MISSED_MAX,
+		       bond->params.missed_max))
+		goto nla_put_failure;
+
+	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+		struct ad_info info;
+
+		if (capable(CAP_NET_ADMIN)) {
+			if (nla_put_u16(skb, IFLA_BOND_AD_ACTOR_SYS_PRIO,
+					bond->params.ad_actor_sys_prio))
+				goto nla_put_failure;
+
+			if (nla_put_u16(skb, IFLA_BOND_AD_USER_PORT_KEY,
+					bond->params.ad_user_port_key))
+				goto nla_put_failure;
+
+			if (nla_put(skb, IFLA_BOND_AD_ACTOR_SYSTEM,
+				    ETH_ALEN, &bond->params.ad_actor_system))
+				goto nla_put_failure;
+		}
+		if (!bond_3ad_get_active_agg_info(bond, &info)) {
+			struct nlattr *nest;
+
+			nest = nla_nest_start_noflag(skb, IFLA_BOND_AD_INFO);
+			if (!nest)
+				goto nla_put_failure;
+
+			if (nla_put_u16(skb, IFLA_BOND_AD_INFO_AGGREGATOR,
+					info.aggregator_id))
+				goto nla_put_failure;
+			if (nla_put_u16(skb, IFLA_BOND_AD_INFO_NUM_PORTS,
+					info.ports))
+				goto nla_put_failure;
+			if (nla_put_u16(skb, IFLA_BOND_AD_INFO_ACTOR_KEY,
+					info.actor_key))
+				goto nla_put_failure;
+			if (nla_put_u16(skb, IFLA_BOND_AD_INFO_PARTNER_KEY,
+					info.partner_key))
+				goto nla_put_failure;
+			if (nla_put(skb, IFLA_BOND_AD_INFO_PARTNER_MAC,
+				    sizeof(info.partner_system),
+				    &info.partner_system))
+				goto nla_put_failure;
+
+			nla_nest_end(skb, nest);
+		}
+	}
+
+	return 0;
+
+nla_put_failure:
+	return -EMSGSIZE;
+}
+
+static size_t bond_get_linkxstats_size(const struct net_device *dev, int attr)
+{
+	switch (attr) {
+	case IFLA_STATS_LINK_XSTATS:
+	case IFLA_STATS_LINK_XSTATS_SLAVE:
+		break;
+	default:
+		return 0;
+	}
+
+	return bond_3ad_stats_size() + nla_total_size(0);
+}
+
+static int bond_fill_linkxstats(struct sk_buff *skb,
+				const struct net_device *dev,
+				int *prividx, int attr)
+{
+	struct nlattr *nla __maybe_unused;
+	struct slave *slave = NULL;
+	struct nlattr *nest, *nest2;
+	struct bonding *bond;
+
+	switch (attr) {
+	case IFLA_STATS_LINK_XSTATS:
+		bond = netdev_priv(dev);
+		break;
+	case IFLA_STATS_LINK_XSTATS_SLAVE:
+		slave = bond_slave_get_rtnl(dev);
+		if (!slave)
+			return 0;
+		bond = slave->bond;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BOND);
+	if (!nest)
+		return -EMSGSIZE;
+	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+		struct bond_3ad_stats *stats;
+
+		if (slave)
+			stats = &SLAVE_AD_INFO(slave)->stats;
+		else
+			stats = &BOND_AD_INFO(bond).stats;
+
+		nest2 = nla_nest_start_noflag(skb, BOND_XSTATS_3AD);
+		if (!nest2) {
+			nla_nest_end(skb, nest);
+			return -EMSGSIZE;
+		}
+
+		if (bond_3ad_stats_fill(skb, stats)) {
+			nla_nest_cancel(skb, nest2);
+			nla_nest_end(skb, nest);
+			return -EMSGSIZE;
+		}
+		nla_nest_end(skb, nest2);
+	}
+	nla_nest_end(skb, nest);
+
+	return 0;
+}
+
+struct rtnl_link_ops bond_link_ops __read_mostly = {
+	.kind			= "bond",
+	.priv_size		= sizeof(struct bonding),
+	.setup			= bond_setup,
+	.maxtype		= IFLA_BOND_MAX,
+	.policy			= bond_policy,
+	.validate		= bond_validate,
+	.newlink		= bond_newlink,
+	.changelink		= bond_changelink,
+	.get_size		= bond_get_size,
+	.fill_info		= bond_fill_info,
+	.get_num_tx_queues	= bond_get_num_tx_queues,
+	.get_num_rx_queues	= bond_get_num_tx_queues, /* Use the same number
+							     as for TX queues */
+	.fill_linkxstats        = bond_fill_linkxstats,
+	.get_linkxstats_size    = bond_get_linkxstats_size,
+	.slave_maxtype		= IFLA_BOND_SLAVE_MAX,
+	.slave_policy		= bond_slave_policy,
+	.slave_changelink	= bond_slave_changelink,
+	.get_slave_size		= bond_get_slave_size,
+	.fill_slave_info	= bond_fill_slave_info,
+};
+
+int __init bond_netlink_init(void)
+{
+	return rtnl_link_register(&bond_link_ops);
+}
+
+void bond_netlink_fini(void)
+{
+	rtnl_link_unregister(&bond_link_ops);
+}
+
+MODULE_ALIAS_RTNL_LINK("bond");
diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c
new file mode 100644
index 0000000000..f3f27f0bd2
--- /dev/null
+++ b/drivers/net/bonding/bond_options.c
@@ -0,0 +1,1694 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * drivers/net/bond/bond_options.c - bonding options
+ * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
+ * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
+ */
+
+#include <linux/errno.h>
+#include <linux/if.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+#include <linux/rcupdate.h>
+#include <linux/ctype.h>
+#include <linux/inet.h>
+#include <linux/sched/signal.h>
+
+#include <net/bonding.h>
+
+static int bond_option_active_slave_set(struct bonding *bond,
+					const struct bond_opt_value *newval);
+static int bond_option_miimon_set(struct bonding *bond,
+				  const struct bond_opt_value *newval);
+static int bond_option_updelay_set(struct bonding *bond,
+				   const struct bond_opt_value *newval);
+static int bond_option_downdelay_set(struct bonding *bond,
+				     const struct bond_opt_value *newval);
+static int bond_option_peer_notif_delay_set(struct bonding *bond,
+					    const struct bond_opt_value *newval);
+static int bond_option_use_carrier_set(struct bonding *bond,
+				       const struct bond_opt_value *newval);
+static int bond_option_arp_interval_set(struct bonding *bond,
+					const struct bond_opt_value *newval);
+static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
+static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
+static int bond_option_arp_ip_targets_set(struct bonding *bond,
+					  const struct bond_opt_value *newval);
+static int bond_option_ns_ip6_targets_set(struct bonding *bond,
+					  const struct bond_opt_value *newval);
+static int bond_option_arp_validate_set(struct bonding *bond,
+					const struct bond_opt_value *newval);
+static int bond_option_arp_all_targets_set(struct bonding *bond,
+					   const struct bond_opt_value *newval);
+static int bond_option_prio_set(struct bonding *bond,
+				const struct bond_opt_value *newval);
+static int bond_option_primary_set(struct bonding *bond,
+				   const struct bond_opt_value *newval);
+static int bond_option_primary_reselect_set(struct bonding *bond,
+					    const struct bond_opt_value *newval);
+static int bond_option_fail_over_mac_set(struct bonding *bond,
+					 const struct bond_opt_value *newval);
+static int bond_option_xmit_hash_policy_set(struct bonding *bond,
+					    const struct bond_opt_value *newval);
+static int bond_option_resend_igmp_set(struct bonding *bond,
+				       const struct bond_opt_value *newval);
+static int bond_option_num_peer_notif_set(struct bonding *bond,
+					  const struct bond_opt_value *newval);
+static int bond_option_all_slaves_active_set(struct bonding *bond,
+					     const struct bond_opt_value *newval);
+static int bond_option_min_links_set(struct bonding *bond,
+				     const struct bond_opt_value *newval);
+static int bond_option_lp_interval_set(struct bonding *bond,
+				       const struct bond_opt_value *newval);
+static int bond_option_pps_set(struct bonding *bond,
+			       const struct bond_opt_value *newval);
+static int bond_option_lacp_active_set(struct bonding *bond,
+				       const struct bond_opt_value *newval);
+static int bond_option_lacp_rate_set(struct bonding *bond,
+				     const struct bond_opt_value *newval);
+static int bond_option_ad_select_set(struct bonding *bond,
+				     const struct bond_opt_value *newval);
+static int bond_option_queue_id_set(struct bonding *bond,
+				    const struct bond_opt_value *newval);
+static int bond_option_mode_set(struct bonding *bond,
+				const struct bond_opt_value *newval);
+static int bond_option_slaves_set(struct bonding *bond,
+				  const struct bond_opt_value *newval);
+static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
+				  const struct bond_opt_value *newval);
+static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
+					     const struct bond_opt_value *newval);
+static int bond_option_ad_actor_system_set(struct bonding *bond,
+					   const struct bond_opt_value *newval);
+static int bond_option_ad_user_port_key_set(struct bonding *bond,
+					    const struct bond_opt_value *newval);
+static int bond_option_missed_max_set(struct bonding *bond,
+				      const struct bond_opt_value *newval);
+
+
+static const struct bond_opt_value bond_mode_tbl[] = {
+	{ "balance-rr",    BOND_MODE_ROUNDROBIN,   BOND_VALFLAG_DEFAULT},
+	{ "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
+	{ "balance-xor",   BOND_MODE_XOR,          0},
+	{ "broadcast",     BOND_MODE_BROADCAST,    0},
+	{ "802.3ad",       BOND_MODE_8023AD,       0},
+	{ "balance-tlb",   BOND_MODE_TLB,          0},
+	{ "balance-alb",   BOND_MODE_ALB,          0},
+	{ NULL,            -1,                     0},
+};
+
+static const struct bond_opt_value bond_pps_tbl[] = {
+	{ "default", 1,         BOND_VALFLAG_DEFAULT},
+	{ "maxval",  USHRT_MAX, BOND_VALFLAG_MAX},
+	{ NULL,      -1,        0},
+};
+
+static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
+	{ "layer2",      BOND_XMIT_POLICY_LAYER2,      BOND_VALFLAG_DEFAULT},
+	{ "layer3+4",    BOND_XMIT_POLICY_LAYER34,     0},
+	{ "layer2+3",    BOND_XMIT_POLICY_LAYER23,     0},
+	{ "encap2+3",    BOND_XMIT_POLICY_ENCAP23,     0},
+	{ "encap3+4",    BOND_XMIT_POLICY_ENCAP34,     0},
+	{ "vlan+srcmac", BOND_XMIT_POLICY_VLAN_SRCMAC, 0},
+	{ NULL,          -1,                           0},
+};
+
+static const struct bond_opt_value bond_arp_validate_tbl[] = {
+	{ "none",		BOND_ARP_VALIDATE_NONE,		BOND_VALFLAG_DEFAULT},
+	{ "active",		BOND_ARP_VALIDATE_ACTIVE,	0},
+	{ "backup",		BOND_ARP_VALIDATE_BACKUP,	0},
+	{ "all",		BOND_ARP_VALIDATE_ALL,		0},
+	{ "filter",		BOND_ARP_FILTER,		0},
+	{ "filter_active",	BOND_ARP_FILTER_ACTIVE,		0},
+	{ "filter_backup",	BOND_ARP_FILTER_BACKUP,		0},
+	{ NULL,			-1,				0},
+};
+
+static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
+	{ "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
+	{ "all", BOND_ARP_TARGETS_ALL, 0},
+	{ NULL,  -1,                   0},
+};
+
+static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
+	{ "none",   BOND_FOM_NONE,   BOND_VALFLAG_DEFAULT},
+	{ "active", BOND_FOM_ACTIVE, 0},
+	{ "follow", BOND_FOM_FOLLOW, 0},
+	{ NULL,     -1,              0},
+};
+
+static const struct bond_opt_value bond_intmax_tbl[] = {
+	{ "off",     0,       BOND_VALFLAG_DEFAULT},
+	{ "maxval",  INT_MAX, BOND_VALFLAG_MAX},
+	{ NULL,      -1,      0}
+};
+
+static const struct bond_opt_value bond_lacp_active[] = {
+	{ "off", 0,  0},
+	{ "on",  1,  BOND_VALFLAG_DEFAULT},
+	{ NULL,  -1, 0}
+};
+
+static const struct bond_opt_value bond_lacp_rate_tbl[] = {
+	{ "slow", AD_LACP_SLOW, 0},
+	{ "fast", AD_LACP_FAST, 0},
+	{ NULL,   -1,           0},
+};
+
+static const struct bond_opt_value bond_ad_select_tbl[] = {
+	{ "stable",    BOND_AD_STABLE,    BOND_VALFLAG_DEFAULT},
+	{ "bandwidth", BOND_AD_BANDWIDTH, 0},
+	{ "count",     BOND_AD_COUNT,     0},
+	{ NULL,        -1,                0},
+};
+
+static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
+	{ "off",     0,   0},
+	{ "maxval",  255, BOND_VALFLAG_MAX},
+	{ "default", 1,   BOND_VALFLAG_DEFAULT},
+	{ NULL,      -1,  0}
+};
+
+static const struct bond_opt_value bond_peer_notif_delay_tbl[] = {
+	{ "off",     0,   0},
+	{ "maxval",  300000, BOND_VALFLAG_MAX},
+	{ NULL,      -1,  0}
+};
+
+static const struct bond_opt_value bond_primary_reselect_tbl[] = {
+	{ "always",  BOND_PRI_RESELECT_ALWAYS,  BOND_VALFLAG_DEFAULT},
+	{ "better",  BOND_PRI_RESELECT_BETTER,  0},
+	{ "failure", BOND_PRI_RESELECT_FAILURE, 0},
+	{ NULL,      -1},
+};
+
+static const struct bond_opt_value bond_use_carrier_tbl[] = {
+	{ "off", 0,  0},
+	{ "on",  1,  BOND_VALFLAG_DEFAULT},
+	{ NULL,  -1, 0}
+};
+
+static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
+	{ "off", 0,  BOND_VALFLAG_DEFAULT},
+	{ "on",  1,  0},
+	{ NULL,  -1, 0}
+};
+
+static const struct bond_opt_value bond_resend_igmp_tbl[] = {
+	{ "off",     0,   0},
+	{ "maxval",  255, BOND_VALFLAG_MAX},
+	{ "default", 1,   BOND_VALFLAG_DEFAULT},
+	{ NULL,      -1,  0}
+};
+
+static const struct bond_opt_value bond_lp_interval_tbl[] = {
+	{ "minval",  1,       BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
+	{ "maxval",  INT_MAX, BOND_VALFLAG_MAX},
+	{ NULL,      -1,      0},
+};
+
+static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
+	{ "off", 0,  0},
+	{ "on",  1,  BOND_VALFLAG_DEFAULT},
+	{ NULL,  -1, 0}
+};
+
+static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
+	{ "minval",  1,     BOND_VALFLAG_MIN},
+	{ "maxval",  65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
+	{ NULL,      -1,    0},
+};
+
+static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
+	{ "minval",  0,     BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
+	{ "maxval",  1023,  BOND_VALFLAG_MAX},
+	{ NULL,      -1,    0},
+};
+
+static const struct bond_opt_value bond_missed_max_tbl[] = {
+	{ "minval",	1,	BOND_VALFLAG_MIN},
+	{ "maxval",	255,	BOND_VALFLAG_MAX},
+	{ "default",	2,	BOND_VALFLAG_DEFAULT},
+	{ NULL,		-1,	0},
+};
+
+static const struct bond_option bond_opts[BOND_OPT_LAST] = {
+	[BOND_OPT_MODE] = {
+		.id = BOND_OPT_MODE,
+		.name = "mode",
+		.desc = "bond device mode",
+		.flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
+		.values = bond_mode_tbl,
+		.set = bond_option_mode_set
+	},
+	[BOND_OPT_PACKETS_PER_SLAVE] = {
+		.id = BOND_OPT_PACKETS_PER_SLAVE,
+		.name = "packets_per_slave",
+		.desc = "Packets to send per slave in RR mode",
+		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
+		.values = bond_pps_tbl,
+		.set = bond_option_pps_set
+	},
+	[BOND_OPT_XMIT_HASH] = {
+		.id = BOND_OPT_XMIT_HASH,
+		.name = "xmit_hash_policy",
+		.desc = "balance-xor, 802.3ad, and tlb hashing method",
+		.values = bond_xmit_hashtype_tbl,
+		.set = bond_option_xmit_hash_policy_set
+	},
+	[BOND_OPT_ARP_VALIDATE] = {
+		.id = BOND_OPT_ARP_VALIDATE,
+		.name = "arp_validate",
+		.desc = "validate src/dst of ARP probes",
+		.unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
+			       BIT(BOND_MODE_ALB),
+		.values = bond_arp_validate_tbl,
+		.set = bond_option_arp_validate_set
+	},
+	[BOND_OPT_ARP_ALL_TARGETS] = {
+		.id = BOND_OPT_ARP_ALL_TARGETS,
+		.name = "arp_all_targets",
+		.desc = "fail on any/all arp targets timeout",
+		.values = bond_arp_all_targets_tbl,
+		.set = bond_option_arp_all_targets_set
+	},
+	[BOND_OPT_FAIL_OVER_MAC] = {
+		.id = BOND_OPT_FAIL_OVER_MAC,
+		.name = "fail_over_mac",
+		.desc = "For active-backup, do not set all slaves to the same MAC",
+		.flags = BOND_OPTFLAG_NOSLAVES,
+		.values = bond_fail_over_mac_tbl,
+		.set = bond_option_fail_over_mac_set
+	},
+	[BOND_OPT_ARP_INTERVAL] = {
+		.id = BOND_OPT_ARP_INTERVAL,
+		.name = "arp_interval",
+		.desc = "arp interval in milliseconds",
+		.unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
+			       BIT(BOND_MODE_ALB),
+		.values = bond_intmax_tbl,
+		.set = bond_option_arp_interval_set
+	},
+	[BOND_OPT_MISSED_MAX] = {
+		.id = BOND_OPT_MISSED_MAX,
+		.name = "arp_missed_max",
+		.desc = "Maximum number of missed ARP interval",
+		.unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
+			       BIT(BOND_MODE_ALB),
+		.values = bond_missed_max_tbl,
+		.set = bond_option_missed_max_set
+	},
+	[BOND_OPT_ARP_TARGETS] = {
+		.id = BOND_OPT_ARP_TARGETS,
+		.name = "arp_ip_target",
+		.desc = "arp targets in n.n.n.n form",
+		.flags = BOND_OPTFLAG_RAWVAL,
+		.set = bond_option_arp_ip_targets_set
+	},
+	[BOND_OPT_NS_TARGETS] = {
+		.id = BOND_OPT_NS_TARGETS,
+		.name = "ns_ip6_target",
+		.desc = "NS targets in ffff:ffff::ffff:ffff form",
+		.flags = BOND_OPTFLAG_RAWVAL,
+		.set = bond_option_ns_ip6_targets_set
+	},
+	[BOND_OPT_DOWNDELAY] = {
+		.id = BOND_OPT_DOWNDELAY,
+		.name = "downdelay",
+		.desc = "Delay before considering link down, in milliseconds",
+		.values = bond_intmax_tbl,
+		.set = bond_option_downdelay_set
+	},
+	[BOND_OPT_UPDELAY] = {
+		.id = BOND_OPT_UPDELAY,
+		.name = "updelay",
+		.desc = "Delay before considering link up, in milliseconds",
+		.values = bond_intmax_tbl,
+		.set = bond_option_updelay_set
+	},
+	[BOND_OPT_LACP_ACTIVE] = {
+		.id = BOND_OPT_LACP_ACTIVE,
+		.name = "lacp_active",
+		.desc = "Send LACPDU frames with configured lacp rate or acts as speak when spoken to",
+		.flags = BOND_OPTFLAG_IFDOWN,
+		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
+		.values = bond_lacp_active,
+		.set = bond_option_lacp_active_set
+	},
+	[BOND_OPT_LACP_RATE] = {
+		.id = BOND_OPT_LACP_RATE,
+		.name = "lacp_rate",
+		.desc = "LACPDU tx rate to request from 802.3ad partner",
+		.flags = BOND_OPTFLAG_IFDOWN,
+		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
+		.values = bond_lacp_rate_tbl,
+		.set = bond_option_lacp_rate_set
+	},
+	[BOND_OPT_MINLINKS] = {
+		.id = BOND_OPT_MINLINKS,
+		.name = "min_links",
+		.desc = "Minimum number of available links before turning on carrier",
+		.values = bond_intmax_tbl,
+		.set = bond_option_min_links_set
+	},
+	[BOND_OPT_AD_SELECT] = {
+		.id = BOND_OPT_AD_SELECT,
+		.name = "ad_select",
+		.desc = "803.ad aggregation selection logic",
+		.flags = BOND_OPTFLAG_IFDOWN,
+		.values = bond_ad_select_tbl,
+		.set = bond_option_ad_select_set
+	},
+	[BOND_OPT_NUM_PEER_NOTIF] = {
+		.id = BOND_OPT_NUM_PEER_NOTIF,
+		.name = "num_unsol_na",
+		.desc = "Number of peer notifications to send on failover event",
+		.values = bond_num_peer_notif_tbl,
+		.set = bond_option_num_peer_notif_set
+	},
+	[BOND_OPT_MIIMON] = {
+		.id = BOND_OPT_MIIMON,
+		.name = "miimon",
+		.desc = "Link check interval in milliseconds",
+		.values = bond_intmax_tbl,
+		.set = bond_option_miimon_set
+	},
+	[BOND_OPT_PRIO] = {
+		.id = BOND_OPT_PRIO,
+		.name = "prio",
+		.desc = "Link priority for failover re-selection",
+		.flags = BOND_OPTFLAG_RAWVAL,
+		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
+						BIT(BOND_MODE_TLB) |
+						BIT(BOND_MODE_ALB)),
+		.set = bond_option_prio_set
+	},
+	[BOND_OPT_PRIMARY] = {
+		.id = BOND_OPT_PRIMARY,
+		.name = "primary",
+		.desc = "Primary network device to use",
+		.flags = BOND_OPTFLAG_RAWVAL,
+		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
+						BIT(BOND_MODE_TLB) |
+						BIT(BOND_MODE_ALB)),
+		.set = bond_option_primary_set
+	},
+	[BOND_OPT_PRIMARY_RESELECT] = {
+		.id = BOND_OPT_PRIMARY_RESELECT,
+		.name = "primary_reselect",
+		.desc = "Reselect primary slave once it comes up",
+		.values = bond_primary_reselect_tbl,
+		.set = bond_option_primary_reselect_set
+	},
+	[BOND_OPT_USE_CARRIER] = {
+		.id = BOND_OPT_USE_CARRIER,
+		.name = "use_carrier",
+		.desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
+		.values = bond_use_carrier_tbl,
+		.set = bond_option_use_carrier_set
+	},
+	[BOND_OPT_ACTIVE_SLAVE] = {
+		.id = BOND_OPT_ACTIVE_SLAVE,
+		.name = "active_slave",
+		.desc = "Currently active slave",
+		.flags = BOND_OPTFLAG_RAWVAL,
+		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
+						BIT(BOND_MODE_TLB) |
+						BIT(BOND_MODE_ALB)),
+		.set = bond_option_active_slave_set
+	},
+	[BOND_OPT_QUEUE_ID] = {
+		.id = BOND_OPT_QUEUE_ID,
+		.name = "queue_id",
+		.desc = "Set queue id of a slave",
+		.flags = BOND_OPTFLAG_RAWVAL,
+		.set = bond_option_queue_id_set
+	},
+	[BOND_OPT_ALL_SLAVES_ACTIVE] = {
+		.id = BOND_OPT_ALL_SLAVES_ACTIVE,
+		.name = "all_slaves_active",
+		.desc = "Keep all frames received on an interface by setting active flag for all slaves",
+		.values = bond_all_slaves_active_tbl,
+		.set = bond_option_all_slaves_active_set
+	},
+	[BOND_OPT_RESEND_IGMP] = {
+		.id = BOND_OPT_RESEND_IGMP,
+		.name = "resend_igmp",
+		.desc = "Number of IGMP membership reports to send on link failure",
+		.values = bond_resend_igmp_tbl,
+		.set = bond_option_resend_igmp_set
+	},
+	[BOND_OPT_LP_INTERVAL] = {
+		.id = BOND_OPT_LP_INTERVAL,
+		.name = "lp_interval",
+		.desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
+		.values = bond_lp_interval_tbl,
+		.set = bond_option_lp_interval_set
+	},
+	[BOND_OPT_SLAVES] = {
+		.id = BOND_OPT_SLAVES,
+		.name = "slaves",
+		.desc = "Slave membership management",
+		.flags = BOND_OPTFLAG_RAWVAL,
+		.set = bond_option_slaves_set
+	},
+	[BOND_OPT_TLB_DYNAMIC_LB] = {
+		.id = BOND_OPT_TLB_DYNAMIC_LB,
+		.name = "tlb_dynamic_lb",
+		.desc = "Enable dynamic flow shuffling",
+		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
+		.values = bond_tlb_dynamic_lb_tbl,
+		.flags = BOND_OPTFLAG_IFDOWN,
+		.set = bond_option_tlb_dynamic_lb_set,
+	},
+	[BOND_OPT_AD_ACTOR_SYS_PRIO] = {
+		.id = BOND_OPT_AD_ACTOR_SYS_PRIO,
+		.name = "ad_actor_sys_prio",
+		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
+		.values = bond_ad_actor_sys_prio_tbl,
+		.set = bond_option_ad_actor_sys_prio_set,
+	},
+	[BOND_OPT_AD_ACTOR_SYSTEM] = {
+		.id = BOND_OPT_AD_ACTOR_SYSTEM,
+		.name = "ad_actor_system",
+		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
+		.flags = BOND_OPTFLAG_RAWVAL,
+		.set = bond_option_ad_actor_system_set,
+	},
+	[BOND_OPT_AD_USER_PORT_KEY] = {
+		.id = BOND_OPT_AD_USER_PORT_KEY,
+		.name = "ad_user_port_key",
+		.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
+		.flags = BOND_OPTFLAG_IFDOWN,
+		.values = bond_ad_user_port_key_tbl,
+		.set = bond_option_ad_user_port_key_set,
+	},
+	[BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
+		.id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
+		.name = "num_grat_arp",
+		.desc = "Number of peer notifications to send on failover event",
+		.values = bond_num_peer_notif_tbl,
+		.set = bond_option_num_peer_notif_set
+	},
+	[BOND_OPT_PEER_NOTIF_DELAY] = {
+		.id = BOND_OPT_PEER_NOTIF_DELAY,
+		.name = "peer_notif_delay",
+		.desc = "Delay between each peer notification on failover event, in milliseconds",
+		.values = bond_peer_notif_delay_tbl,
+		.set = bond_option_peer_notif_delay_set
+	}
+};
+
+/* Searches for an option by name */
+const struct bond_option *bond_opt_get_by_name(const char *name)
+{
+	const struct bond_option *opt;
+	int option;
+
+	for (option = 0; option < BOND_OPT_LAST; option++) {
+		opt = bond_opt_get(option);
+		if (opt && !strcmp(opt->name, name))
+			return opt;
+	}
+
+	return NULL;
+}
+
+/* Searches for a value in opt's values[] table */
+const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
+{
+	const struct bond_option *opt;
+	int i;
+
+	opt = bond_opt_get(option);
+	if (WARN_ON(!opt))
+		return NULL;
+	for (i = 0; opt->values && opt->values[i].string; i++)
+		if (opt->values[i].value == val)
+			return &opt->values[i];
+
+	return NULL;
+}
+
+/* Searches for a value in opt's values[] table which matches the flagmask */
+static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
+						       u32 flagmask)
+{
+	int i;
+
+	for (i = 0; opt->values && opt->values[i].string; i++)
+		if (opt->values[i].flags & flagmask)
+			return &opt->values[i];
+
+	return NULL;
+}
+
+/* If maxval is missing then there's no range to check. In case minval is
+ * missing then it's considered to be 0.
+ */
+static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
+{
+	const struct bond_opt_value *minval, *maxval;
+
+	minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
+	maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
+	if (!maxval || (minval && val < minval->value) || val > maxval->value)
+		return false;
+
+	return true;
+}
+
+/**
+ * bond_opt_parse - parse option value
+ * @opt: the option to parse against
+ * @val: value to parse
+ *
+ * This function tries to extract the value from @val and check if it's
+ * a possible match for the option and returns NULL if a match isn't found,
+ * or the struct_opt_value that matched. It also strips the new line from
+ * @val->string if it's present.
+ */
+const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
+					    struct bond_opt_value *val)
+{
+	char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
+	const struct bond_opt_value *tbl;
+	const struct bond_opt_value *ret = NULL;
+	bool checkval;
+	int i, rv;
+
+	/* No parsing if the option wants a raw val */
+	if (opt->flags & BOND_OPTFLAG_RAWVAL)
+		return val;
+
+	tbl = opt->values;
+	if (!tbl)
+		goto out;
+
+	/* ULLONG_MAX is used to bypass string processing */
+	checkval = val->value != ULLONG_MAX;
+	if (!checkval) {
+		if (!val->string)
+			goto out;
+		p = strchr(val->string, '\n');
+		if (p)
+			*p = '\0';
+		for (p = val->string; *p; p++)
+			if (!(isdigit(*p) || isspace(*p)))
+				break;
+		/* The following code extracts the string to match or the value
+		 * and sets checkval appropriately
+		 */
+		if (*p) {
+			rv = sscanf(val->string, "%32s", valstr);
+		} else {
+			rv = sscanf(val->string, "%llu", &val->value);
+			checkval = true;
+		}
+		if (!rv)
+			goto out;
+	}
+
+	for (i = 0; tbl[i].string; i++) {
+		/* Check for exact match */
+		if (checkval) {
+			if (val->value == tbl[i].value)
+				ret = &tbl[i];
+		} else {
+			if (!strcmp(valstr, "default") &&
+			    (tbl[i].flags & BOND_VALFLAG_DEFAULT))
+				ret = &tbl[i];
+
+			if (!strcmp(valstr, tbl[i].string))
+				ret = &tbl[i];
+		}
+		/* Found an exact match */
+		if (ret)
+			goto out;
+	}
+	/* Possible range match */
+	if (checkval && bond_opt_check_range(opt, val->value))
+		ret = val;
+out:
+	return ret;
+}
+
+/* Check opt's dependencies against bond mode and currently set options */
+static int bond_opt_check_deps(struct bonding *bond,
+			       const struct bond_option *opt)
+{
+	struct bond_params *params = &bond->params;
+
+	if (test_bit(params->mode, &opt->unsuppmodes))
+		return -EACCES;
+	if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
+		return -ENOTEMPTY;
+	if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
+		return -EBUSY;
+
+	return 0;
+}
+
+static void bond_opt_dep_print(struct bonding *bond,
+			       const struct bond_option *opt,
+			       struct nlattr *bad_attr,
+			       struct netlink_ext_ack *extack)
+{
+	const struct bond_opt_value *modeval;
+	struct bond_params *params;
+
+	params = &bond->params;
+	modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
+	if (test_bit(params->mode, &opt->unsuppmodes)) {
+		netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
+			   opt->name, modeval->string, modeval->value);
+		NL_SET_ERR_MSG_ATTR(extack, bad_attr,
+				    "option not supported in mode");
+	}
+}
+
+static void bond_opt_error_interpret(struct bonding *bond,
+				     const struct bond_option *opt,
+				     int error, const struct bond_opt_value *val,
+				     struct nlattr *bad_attr,
+				     struct netlink_ext_ack *extack)
+{
+	const struct bond_opt_value *minval, *maxval;
+	char *p;
+
+	switch (error) {
+	case -EINVAL:
+		NL_SET_ERR_MSG_ATTR(extack, bad_attr, "invalid option value");
+		if (val) {
+			if (val->string) {
+				/* sometimes RAWVAL opts may have new lines */
+				p = strchr(val->string, '\n');
+				if (p)
+					*p = '\0';
+				netdev_err(bond->dev, "option %s: invalid value (%s)\n",
+					   opt->name, val->string);
+			} else {
+				netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
+					   opt->name, val->value);
+			}
+		}
+		minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
+		maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
+		if (!maxval)
+			break;
+		netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
+			   opt->name, minval ? minval->value : 0, maxval->value);
+		break;
+	case -EACCES:
+		bond_opt_dep_print(bond, opt, bad_attr, extack);
+		break;
+	case -ENOTEMPTY:
+		NL_SET_ERR_MSG_ATTR(extack, bad_attr,
+				    "unable to set option because the bond device has slaves");
+		netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
+			   opt->name);
+		break;
+	case -EBUSY:
+		NL_SET_ERR_MSG_ATTR(extack, bad_attr,
+				    "unable to set option because the bond is up");
+		netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
+			   opt->name);
+		break;
+	case -ENODEV:
+		if (val && val->string) {
+			p = strchr(val->string, '\n');
+			if (p)
+				*p = '\0';
+			netdev_err(bond->dev, "option %s: interface %s does not exist!\n",
+				   opt->name, val->string);
+			NL_SET_ERR_MSG_ATTR(extack, bad_attr,
+					    "interface does not exist");
+		}
+		break;
+	default:
+		break;
+	}
+}
+
+/**
+ * __bond_opt_set - set a bonding option
+ * @bond: target bond device
+ * @option: option to set
+ * @val: value to set it to
+ * @bad_attr: netlink attribue that caused the error
+ * @extack: extended netlink error structure, used when an error message
+ *          needs to be returned to the caller via netlink
+ *
+ * This function is used to change the bond's option value, it can be
+ * used for both enabling/changing an option and for disabling it. RTNL lock
+ * must be obtained before calling this function.
+ */
+int __bond_opt_set(struct bonding *bond,
+		   unsigned int option, struct bond_opt_value *val,
+		   struct nlattr *bad_attr, struct netlink_ext_ack *extack)
+{
+	const struct bond_opt_value *retval = NULL;
+	const struct bond_option *opt;
+	int ret = -ENOENT;
+
+	ASSERT_RTNL();
+
+	opt = bond_opt_get(option);
+	if (WARN_ON(!val) || WARN_ON(!opt))
+		goto out;
+	ret = bond_opt_check_deps(bond, opt);
+	if (ret)
+		goto out;
+	retval = bond_opt_parse(opt, val);
+	if (!retval) {
+		ret = -EINVAL;
+		goto out;
+	}
+	ret = opt->set(bond, retval);
+out:
+	if (ret)
+		bond_opt_error_interpret(bond, opt, ret, val, bad_attr, extack);
+
+	return ret;
+}
+/**
+ * __bond_opt_set_notify - set a bonding option
+ * @bond: target bond device
+ * @option: option to set
+ * @val: value to set it to
+ *
+ * This function is used to change the bond's option value and trigger
+ * a notification to user sapce. It can be used for both enabling/changing
+ * an option and for disabling it. RTNL lock must be obtained before calling
+ * this function.
+ */
+int __bond_opt_set_notify(struct bonding *bond,
+			  unsigned int option, struct bond_opt_value *val)
+{
+	int ret;
+
+	ASSERT_RTNL();
+
+	ret = __bond_opt_set(bond, option, val, NULL, NULL);
+
+	if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
+		call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
+
+	return ret;
+}
+
+/**
+ * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
+ * @bond: target bond device
+ * @option: option to set
+ * @buf: value to set it to
+ *
+ * This function tries to acquire RTNL without blocking and if successful
+ * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
+ */
+int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
+{
+	struct bond_opt_value optval;
+	int ret;
+
+	if (!rtnl_trylock())
+		return restart_syscall();
+	bond_opt_initstr(&optval, buf);
+	ret = __bond_opt_set_notify(bond, option, &optval);
+	rtnl_unlock();
+
+	return ret;
+}
+
+/**
+ * bond_opt_get - get a pointer to an option
+ * @option: option for which to return a pointer
+ *
+ * This function checks if option is valid and if so returns a pointer
+ * to its entry in the bond_opts[] option array.
+ */
+const struct bond_option *bond_opt_get(unsigned int option)
+{
+	if (!BOND_OPT_VALID(option))
+		return NULL;
+
+	return &bond_opts[option];
+}
+
+static bool bond_set_xfrm_features(struct bonding *bond)
+{
+	if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD))
+		return false;
+
+	if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
+		bond->dev->wanted_features |= BOND_XFRM_FEATURES;
+	else
+		bond->dev->wanted_features &= ~BOND_XFRM_FEATURES;
+
+	return true;
+}
+
+static int bond_option_mode_set(struct bonding *bond,
+				const struct bond_opt_value *newval)
+{
+	if (!bond_mode_uses_arp(newval->value)) {
+		if (bond->params.arp_interval) {
+			netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
+				   newval->string);
+			/* disable arp monitoring */
+			bond->params.arp_interval = 0;
+		}
+
+		if (!bond->params.miimon) {
+			/* set miimon to default value */
+			bond->params.miimon = BOND_DEFAULT_MIIMON;
+			netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
+				   bond->params.miimon);
+		}
+	}
+
+	if (newval->value == BOND_MODE_ALB)
+		bond->params.tlb_dynamic_lb = 1;
+
+	/* don't cache arp_validate between modes */
+	bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
+	bond->params.mode = newval->value;
+
+	if (bond->dev->reg_state == NETREG_REGISTERED) {
+		bool update = false;
+
+		update |= bond_set_xfrm_features(bond);
+
+		if (update)
+			netdev_update_features(bond->dev);
+	}
+
+	bond_xdp_set_features(bond->dev);
+
+	return 0;
+}
+
+static int bond_option_active_slave_set(struct bonding *bond,
+					const struct bond_opt_value *newval)
+{
+	char ifname[IFNAMSIZ] = { 0, };
+	struct net_device *slave_dev;
+	int ret = 0;
+
+	sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
+	if (!strlen(ifname) || newval->string[0] == '\n') {
+		slave_dev = NULL;
+	} else {
+		slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
+		if (!slave_dev)
+			return -ENODEV;
+	}
+
+	if (slave_dev) {
+		if (!netif_is_bond_slave(slave_dev)) {
+			slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
+			return -EINVAL;
+		}
+
+		if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
+			slave_err(bond->dev, slave_dev, "Device is not our slave\n");
+			return -EINVAL;
+		}
+	}
+
+	block_netpoll_tx();
+	/* check to see if we are clearing active */
+	if (!slave_dev) {
+		netdev_dbg(bond->dev, "Clearing current active slave\n");
+		RCU_INIT_POINTER(bond->curr_active_slave, NULL);
+		bond_select_active_slave(bond);
+	} else {
+		struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
+		struct slave *new_active = bond_slave_get_rtnl(slave_dev);
+
+		BUG_ON(!new_active);
+
+		if (new_active == old_active) {
+			/* do nothing */
+			slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
+		} else {
+			if (old_active && (new_active->link == BOND_LINK_UP) &&
+			    bond_slave_is_up(new_active)) {
+				slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
+				bond_change_active_slave(bond, new_active);
+			} else {
+				slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
+					  new_active->dev->name);
+				ret = -EINVAL;
+			}
+		}
+	}
+	unblock_netpoll_tx();
+
+	return ret;
+}
+
+/* There are two tricky bits here.  First, if MII monitoring is activated, then
+ * we must disable ARP monitoring.  Second, if the timer isn't running, we must
+ * start it.
+ */
+static int bond_option_miimon_set(struct bonding *bond,
+				  const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
+		   newval->value);
+	bond->params.miimon = newval->value;
+	if (bond->params.updelay)
+		netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
+			   bond->params.updelay * bond->params.miimon);
+	if (bond->params.downdelay)
+		netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
+			   bond->params.downdelay * bond->params.miimon);
+	if (bond->params.peer_notif_delay)
+		netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
+			   bond->params.peer_notif_delay * bond->params.miimon);
+	if (newval->value && bond->params.arp_interval) {
+		netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
+		bond->params.arp_interval = 0;
+		if (bond->params.arp_validate)
+			bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
+	}
+	if (bond->dev->flags & IFF_UP) {
+		/* If the interface is up, we may need to fire off
+		 * the MII timer. If the interface is down, the
+		 * timer will get fired off when the open function
+		 * is called.
+		 */
+		if (!newval->value) {
+			cancel_delayed_work_sync(&bond->mii_work);
+		} else {
+			cancel_delayed_work_sync(&bond->arp_work);
+			queue_delayed_work(bond->wq, &bond->mii_work, 0);
+		}
+	}
+
+	return 0;
+}
+
+/* Set up, down and peer notification delays. These must be multiples
+ * of the MII monitoring value, and are stored internally as the
+ * multiplier. Thus, we must translate to MS for the real world.
+ */
+static int _bond_option_delay_set(struct bonding *bond,
+				  const struct bond_opt_value *newval,
+				  const char *name,
+				  int *target)
+{
+	int value = newval->value;
+
+	if (!bond->params.miimon) {
+		netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
+			   name);
+		return -EPERM;
+	}
+	if ((value % bond->params.miimon) != 0) {
+		netdev_warn(bond->dev,
+			    "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
+			    name,
+			    value, bond->params.miimon,
+			    (value / bond->params.miimon) *
+			    bond->params.miimon);
+	}
+	*target = value / bond->params.miimon;
+	netdev_dbg(bond->dev, "Setting %s to %d\n",
+		   name,
+		   *target * bond->params.miimon);
+
+	return 0;
+}
+
+static int bond_option_updelay_set(struct bonding *bond,
+				   const struct bond_opt_value *newval)
+{
+	return _bond_option_delay_set(bond, newval, "up delay",
+				      &bond->params.updelay);
+}
+
+static int bond_option_downdelay_set(struct bonding *bond,
+				     const struct bond_opt_value *newval)
+{
+	return _bond_option_delay_set(bond, newval, "down delay",
+				      &bond->params.downdelay);
+}
+
+static int bond_option_peer_notif_delay_set(struct bonding *bond,
+					    const struct bond_opt_value *newval)
+{
+	int ret = _bond_option_delay_set(bond, newval,
+					 "peer notification delay",
+					 &bond->params.peer_notif_delay);
+	return ret;
+}
+
+static int bond_option_use_carrier_set(struct bonding *bond,
+				       const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
+		   newval->value);
+	bond->params.use_carrier = newval->value;
+
+	return 0;
+}
+
+/* There are two tricky bits here.  First, if ARP monitoring is activated, then
+ * we must disable MII monitoring.  Second, if the ARP timer isn't running,
+ * we must start it.
+ */
+static int bond_option_arp_interval_set(struct bonding *bond,
+					const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
+		   newval->value);
+	bond->params.arp_interval = newval->value;
+	if (newval->value) {
+		if (bond->params.miimon) {
+			netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
+			bond->params.miimon = 0;
+		}
+		if (!bond->params.arp_targets[0])
+			netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
+	}
+	if (bond->dev->flags & IFF_UP) {
+		/* If the interface is up, we may need to fire off
+		 * the ARP timer.  If the interface is down, the
+		 * timer will get fired off when the open function
+		 * is called.
+		 */
+		if (!newval->value) {
+			if (bond->params.arp_validate)
+				bond->recv_probe = NULL;
+			cancel_delayed_work_sync(&bond->arp_work);
+		} else {
+			/* arp_validate can be set only in active-backup mode */
+			bond->recv_probe = bond_rcv_validate;
+			cancel_delayed_work_sync(&bond->mii_work);
+			queue_delayed_work(bond->wq, &bond->arp_work, 0);
+		}
+	}
+
+	return 0;
+}
+
+static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
+					    __be32 target,
+					    unsigned long last_rx)
+{
+	__be32 *targets = bond->params.arp_targets;
+	struct list_head *iter;
+	struct slave *slave;
+
+	if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
+		bond_for_each_slave(bond, slave, iter)
+			slave->target_last_arp_rx[slot] = last_rx;
+		targets[slot] = target;
+	}
+}
+
+static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
+{
+	__be32 *targets = bond->params.arp_targets;
+	int ind;
+
+	if (!bond_is_ip_target_ok(target)) {
+		netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
+			   &target);
+		return -EINVAL;
+	}
+
+	if (bond_get_targets_ip(targets, target) != -1) { /* dup */
+		netdev_err(bond->dev, "ARP target %pI4 is already present\n",
+			   &target);
+		return -EINVAL;
+	}
+
+	ind = bond_get_targets_ip(targets, 0); /* first free slot */
+	if (ind == -1) {
+		netdev_err(bond->dev, "ARP target table is full!\n");
+		return -EINVAL;
+	}
+
+	netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
+
+	_bond_options_arp_ip_target_set(bond, ind, target, jiffies);
+
+	return 0;
+}
+
+static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
+{
+	return _bond_option_arp_ip_target_add(bond, target);
+}
+
+static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
+{
+	__be32 *targets = bond->params.arp_targets;
+	struct list_head *iter;
+	struct slave *slave;
+	unsigned long *targets_rx;
+	int ind, i;
+
+	if (!bond_is_ip_target_ok(target)) {
+		netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
+			   &target);
+		return -EINVAL;
+	}
+
+	ind = bond_get_targets_ip(targets, target);
+	if (ind == -1) {
+		netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
+			   &target);
+		return -EINVAL;
+	}
+
+	if (ind == 0 && !targets[1] && bond->params.arp_interval)
+		netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
+
+	netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
+
+	bond_for_each_slave(bond, slave, iter) {
+		targets_rx = slave->target_last_arp_rx;
+		for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
+			targets_rx[i] = targets_rx[i+1];
+		targets_rx[i] = 0;
+	}
+	for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
+		targets[i] = targets[i+1];
+	targets[i] = 0;
+
+	return 0;
+}
+
+void bond_option_arp_ip_targets_clear(struct bonding *bond)
+{
+	int i;
+
+	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
+		_bond_options_arp_ip_target_set(bond, i, 0, 0);
+}
+
+static int bond_option_arp_ip_targets_set(struct bonding *bond,
+					  const struct bond_opt_value *newval)
+{
+	int ret = -EPERM;
+	__be32 target;
+
+	if (newval->string) {
+		if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
+			netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
+				   &target);
+			return ret;
+		}
+		if (newval->string[0] == '+')
+			ret = bond_option_arp_ip_target_add(bond, target);
+		else if (newval->string[0] == '-')
+			ret = bond_option_arp_ip_target_rem(bond, target);
+		else
+			netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
+	} else {
+		target = newval->value;
+		ret = bond_option_arp_ip_target_add(bond, target);
+	}
+
+	return ret;
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot,
+					    struct in6_addr *target,
+					    unsigned long last_rx)
+{
+	struct in6_addr *targets = bond->params.ns_targets;
+	struct list_head *iter;
+	struct slave *slave;
+
+	if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) {
+		bond_for_each_slave(bond, slave, iter)
+			slave->target_last_arp_rx[slot] = last_rx;
+		targets[slot] = *target;
+	}
+}
+
+void bond_option_ns_ip6_targets_clear(struct bonding *bond)
+{
+	struct in6_addr addr_any = in6addr_any;
+	int i;
+
+	for (i = 0; i < BOND_MAX_NS_TARGETS; i++)
+		_bond_options_ns_ip6_target_set(bond, i, &addr_any, 0);
+}
+
+static int bond_option_ns_ip6_targets_set(struct bonding *bond,
+					  const struct bond_opt_value *newval)
+{
+	struct in6_addr *target = (struct in6_addr *)newval->extra;
+	struct in6_addr *targets = bond->params.ns_targets;
+	struct in6_addr addr_any = in6addr_any;
+	int index;
+
+	if (!bond_is_ip6_target_ok(target)) {
+		netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n",
+			   target);
+		return -EINVAL;
+	}
+
+	if (bond_get_targets_ip6(targets, target) != -1) { /* dup */
+		netdev_err(bond->dev, "NS target %pI6c is already present\n",
+			   target);
+		return -EINVAL;
+	}
+
+	index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */
+	if (index == -1) {
+		netdev_err(bond->dev, "NS target table is full!\n");
+		return -EINVAL;
+	}
+
+	netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target);
+
+	_bond_options_ns_ip6_target_set(bond, index, target, jiffies);
+
+	return 0;
+}
+#else
+static int bond_option_ns_ip6_targets_set(struct bonding *bond,
+					  const struct bond_opt_value *newval)
+{
+	return -EPERM;
+}
+#endif
+
+static int bond_option_arp_validate_set(struct bonding *bond,
+					const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
+		   newval->string, newval->value);
+	bond->params.arp_validate = newval->value;
+
+	return 0;
+}
+
+static int bond_option_arp_all_targets_set(struct bonding *bond,
+					   const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
+		   newval->string, newval->value);
+	bond->params.arp_all_targets = newval->value;
+
+	return 0;
+}
+
+static int bond_option_missed_max_set(struct bonding *bond,
+				      const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n",
+		   newval->string, newval->value);
+	bond->params.missed_max = newval->value;
+
+	return 0;
+}
+
+static int bond_option_prio_set(struct bonding *bond,
+				const struct bond_opt_value *newval)
+{
+	struct slave *slave;
+
+	slave = bond_slave_get_rtnl(newval->slave_dev);
+	if (!slave) {
+		netdev_dbg(newval->slave_dev, "%s called on NULL slave\n", __func__);
+		return -ENODEV;
+	}
+	slave->prio = newval->value;
+
+	if (rtnl_dereference(bond->primary_slave))
+		slave_warn(bond->dev, slave->dev,
+			   "prio updated, but will not affect failover re-selection as primary slave have been set\n");
+	else
+		bond_select_active_slave(bond);
+
+	return 0;
+}
+
+static int bond_option_primary_set(struct bonding *bond,
+				   const struct bond_opt_value *newval)
+{
+	char *p, *primary = newval->string;
+	struct list_head *iter;
+	struct slave *slave;
+
+	block_netpoll_tx();
+
+	p = strchr(primary, '\n');
+	if (p)
+		*p = '\0';
+	/* check to see if we are clearing primary */
+	if (!strlen(primary)) {
+		netdev_dbg(bond->dev, "Setting primary slave to None\n");
+		RCU_INIT_POINTER(bond->primary_slave, NULL);
+		memset(bond->params.primary, 0, sizeof(bond->params.primary));
+		bond_select_active_slave(bond);
+		goto out;
+	}
+
+	bond_for_each_slave(bond, slave, iter) {
+		if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
+			slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
+			rcu_assign_pointer(bond->primary_slave, slave);
+			strcpy(bond->params.primary, slave->dev->name);
+			bond->force_primary = true;
+			bond_select_active_slave(bond);
+			goto out;
+		}
+	}
+
+	if (rtnl_dereference(bond->primary_slave)) {
+		netdev_dbg(bond->dev, "Setting primary slave to None\n");
+		RCU_INIT_POINTER(bond->primary_slave, NULL);
+		bond_select_active_slave(bond);
+	}
+	strscpy_pad(bond->params.primary, primary, IFNAMSIZ);
+
+	netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
+		   primary);
+
+out:
+	unblock_netpoll_tx();
+
+	return 0;
+}
+
+static int bond_option_primary_reselect_set(struct bonding *bond,
+					    const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
+		   newval->string, newval->value);
+	bond->params.primary_reselect = newval->value;
+
+	block_netpoll_tx();
+	bond_select_active_slave(bond);
+	unblock_netpoll_tx();
+
+	return 0;
+}
+
+static int bond_option_fail_over_mac_set(struct bonding *bond,
+					 const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
+		   newval->string, newval->value);
+	bond->params.fail_over_mac = newval->value;
+
+	return 0;
+}
+
+static int bond_option_xmit_hash_policy_set(struct bonding *bond,
+					    const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
+		   newval->string, newval->value);
+	bond->params.xmit_policy = newval->value;
+
+	return 0;
+}
+
+static int bond_option_resend_igmp_set(struct bonding *bond,
+				       const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
+		   newval->value);
+	bond->params.resend_igmp = newval->value;
+
+	return 0;
+}
+
+static int bond_option_num_peer_notif_set(struct bonding *bond,
+				   const struct bond_opt_value *newval)
+{
+	bond->params.num_peer_notif = newval->value;
+
+	return 0;
+}
+
+static int bond_option_all_slaves_active_set(struct bonding *bond,
+					     const struct bond_opt_value *newval)
+{
+	struct list_head *iter;
+	struct slave *slave;
+
+	if (newval->value == bond->params.all_slaves_active)
+		return 0;
+	bond->params.all_slaves_active = newval->value;
+	bond_for_each_slave(bond, slave, iter) {
+		if (!bond_is_active_slave(slave)) {
+			if (newval->value)
+				slave->inactive = 0;
+			else
+				slave->inactive = 1;
+		}
+	}
+
+	return 0;
+}
+
+static int bond_option_min_links_set(struct bonding *bond,
+				     const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting min links value to %llu\n",
+		   newval->value);
+	bond->params.min_links = newval->value;
+	bond_set_carrier(bond);
+
+	return 0;
+}
+
+static int bond_option_lp_interval_set(struct bonding *bond,
+				       const struct bond_opt_value *newval)
+{
+	bond->params.lp_interval = newval->value;
+
+	return 0;
+}
+
+static int bond_option_pps_set(struct bonding *bond,
+			       const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
+		   newval->value);
+	bond->params.packets_per_slave = newval->value;
+	if (newval->value > 0) {
+		bond->params.reciprocal_packets_per_slave =
+			reciprocal_value(newval->value);
+	} else {
+		/* reciprocal_packets_per_slave is unused if
+		 * packets_per_slave is 0 or 1, just initialize it
+		 */
+		bond->params.reciprocal_packets_per_slave =
+			(struct reciprocal_value) { 0 };
+	}
+
+	return 0;
+}
+
+static int bond_option_lacp_active_set(struct bonding *bond,
+				       const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n",
+		   newval->string, newval->value);
+	bond->params.lacp_active = newval->value;
+
+	return 0;
+}
+
+static int bond_option_lacp_rate_set(struct bonding *bond,
+				     const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
+		   newval->string, newval->value);
+	bond->params.lacp_fast = newval->value;
+	bond_3ad_update_lacp_rate(bond);
+
+	return 0;
+}
+
+static int bond_option_ad_select_set(struct bonding *bond,
+				     const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
+		   newval->string, newval->value);
+	bond->params.ad_select = newval->value;
+
+	return 0;
+}
+
+static int bond_option_queue_id_set(struct bonding *bond,
+				    const struct bond_opt_value *newval)
+{
+	struct slave *slave, *update_slave;
+	struct net_device *sdev;
+	struct list_head *iter;
+	char *delim;
+	int ret = 0;
+	u16 qid;
+
+	/* delim will point to queue id if successful */
+	delim = strchr(newval->string, ':');
+	if (!delim)
+		goto err_no_cmd;
+
+	/* Terminate string that points to device name and bump it
+	 * up one, so we can read the queue id there.
+	 */
+	*delim = '\0';
+	if (sscanf(++delim, "%hd\n", &qid) != 1)
+		goto err_no_cmd;
+
+	/* Check buffer length, valid ifname and queue id */
+	if (!dev_valid_name(newval->string) ||
+	    qid > bond->dev->real_num_tx_queues)
+		goto err_no_cmd;
+
+	/* Get the pointer to that interface if it exists */
+	sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
+	if (!sdev)
+		goto err_no_cmd;
+
+	/* Search for thes slave and check for duplicate qids */
+	update_slave = NULL;
+	bond_for_each_slave(bond, slave, iter) {
+		if (sdev == slave->dev)
+			/* We don't need to check the matching
+			 * slave for dups, since we're overwriting it
+			 */
+			update_slave = slave;
+		else if (qid && qid == slave->queue_id) {
+			goto err_no_cmd;
+		}
+	}
+
+	if (!update_slave)
+		goto err_no_cmd;
+
+	/* Actually set the qids for the slave */
+	update_slave->queue_id = qid;
+
+out:
+	return ret;
+
+err_no_cmd:
+	netdev_dbg(bond->dev, "invalid input for queue_id set\n");
+	ret = -EPERM;
+	goto out;
+
+}
+
+static int bond_option_slaves_set(struct bonding *bond,
+				  const struct bond_opt_value *newval)
+{
+	char command[IFNAMSIZ + 1] = { 0, };
+	struct net_device *dev;
+	char *ifname;
+	int ret;
+
+	sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
+	ifname = command + 1;
+	if ((strlen(command) <= 1) ||
+	    (command[0] != '+' && command[0] != '-') ||
+	    !dev_valid_name(ifname))
+		goto err_no_cmd;
+
+	dev = __dev_get_by_name(dev_net(bond->dev), ifname);
+	if (!dev) {
+		netdev_dbg(bond->dev, "interface %s does not exist!\n",
+			   ifname);
+		ret = -ENODEV;
+		goto out;
+	}
+
+	switch (command[0]) {
+	case '+':
+		slave_dbg(bond->dev, dev, "Enslaving interface\n");
+		ret = bond_enslave(bond->dev, dev, NULL);
+		break;
+
+	case '-':
+		slave_dbg(bond->dev, dev, "Releasing interface\n");
+		ret = bond_release(bond->dev, dev);
+		break;
+
+	default:
+		/* should not run here. */
+		goto err_no_cmd;
+	}
+
+out:
+	return ret;
+
+err_no_cmd:
+	netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
+	ret = -EPERM;
+	goto out;
+}
+
+static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
+					  const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
+		   newval->string, newval->value);
+	bond->params.tlb_dynamic_lb = newval->value;
+
+	return 0;
+}
+
+static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
+					     const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
+		   newval->value);
+
+	bond->params.ad_actor_sys_prio = newval->value;
+	bond_3ad_update_ad_actor_settings(bond);
+
+	return 0;
+}
+
+static int bond_option_ad_actor_system_set(struct bonding *bond,
+					   const struct bond_opt_value *newval)
+{
+	u8 macaddr[ETH_ALEN];
+	u8 *mac;
+
+	if (newval->string) {
+		if (!mac_pton(newval->string, macaddr))
+			goto err;
+		mac = macaddr;
+	} else {
+		mac = (u8 *)&newval->value;
+	}
+
+	if (is_multicast_ether_addr(mac))
+		goto err;
+
+	netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
+	ether_addr_copy(bond->params.ad_actor_system, mac);
+	bond_3ad_update_ad_actor_settings(bond);
+
+	return 0;
+
+err:
+	netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
+	return -EINVAL;
+}
+
+static int bond_option_ad_user_port_key_set(struct bonding *bond,
+					    const struct bond_opt_value *newval)
+{
+	netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
+		   newval->value);
+
+	bond->params.ad_user_port_key = newval->value;
+	return 0;
+}
diff --git a/drivers/net/bonding/bond_procfs.c b/drivers/net/bonding/bond_procfs.c
new file mode 100644
index 0000000000..43be458422
--- /dev/null
+++ b/drivers/net/bonding/bond_procfs.c
@@ -0,0 +1,332 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/proc_fs.h>
+#include <linux/ethtool.h>
+#include <linux/export.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+#include <net/bonding.h>
+
+#include "bonding_priv.h"
+
+static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
+	__acquires(RCU)
+{
+	struct bonding *bond = pde_data(file_inode(seq->file));
+	struct list_head *iter;
+	struct slave *slave;
+	loff_t off = 0;
+
+	rcu_read_lock();
+
+	if (*pos == 0)
+		return SEQ_START_TOKEN;
+
+	bond_for_each_slave_rcu(bond, slave, iter)
+		if (++off == *pos)
+			return slave;
+
+	return NULL;
+}
+
+static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	struct bonding *bond = pde_data(file_inode(seq->file));
+	struct list_head *iter;
+	struct slave *slave;
+	bool found = false;
+
+	++*pos;
+	if (v == SEQ_START_TOKEN)
+		return bond_first_slave_rcu(bond);
+
+	bond_for_each_slave_rcu(bond, slave, iter) {
+		if (found)
+			return slave;
+		if (slave == v)
+			found = true;
+	}
+
+	return NULL;
+}
+
+static void bond_info_seq_stop(struct seq_file *seq, void *v)
+	__releases(RCU)
+{
+	rcu_read_unlock();
+}
+
+static void bond_info_show_master(struct seq_file *seq)
+{
+	struct bonding *bond = pde_data(file_inode(seq->file));
+	const struct bond_opt_value *optval;
+	struct slave *curr, *primary;
+	int i;
+
+	curr = rcu_dereference(bond->curr_active_slave);
+
+	seq_printf(seq, "Bonding Mode: %s",
+		   bond_mode_name(BOND_MODE(bond)));
+
+	if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
+	    bond->params.fail_over_mac) {
+		optval = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
+					  bond->params.fail_over_mac);
+		seq_printf(seq, " (fail_over_mac %s)", optval->string);
+	}
+
+	seq_printf(seq, "\n");
+
+	if (bond_mode_uses_xmit_hash(bond)) {
+		optval = bond_opt_get_val(BOND_OPT_XMIT_HASH,
+					  bond->params.xmit_policy);
+		seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
+			   optval->string, bond->params.xmit_policy);
+	}
+
+	if (bond_uses_primary(bond)) {
+		primary = rcu_dereference(bond->primary_slave);
+		seq_printf(seq, "Primary Slave: %s",
+			   primary ? primary->dev->name : "None");
+		if (primary) {
+			optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
+						  bond->params.primary_reselect);
+			seq_printf(seq, " (primary_reselect %s)",
+				   optval->string);
+		}
+
+		seq_printf(seq, "\nCurrently Active Slave: %s\n",
+			   (curr) ? curr->dev->name : "None");
+	}
+
+	seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
+		   "up" : "down");
+	seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
+	seq_printf(seq, "Up Delay (ms): %d\n",
+		   bond->params.updelay * bond->params.miimon);
+	seq_printf(seq, "Down Delay (ms): %d\n",
+		   bond->params.downdelay * bond->params.miimon);
+	seq_printf(seq, "Peer Notification Delay (ms): %d\n",
+		   bond->params.peer_notif_delay * bond->params.miimon);
+
+
+	/* ARP information */
+	if (bond->params.arp_interval > 0) {
+		int printed = 0;
+
+		seq_printf(seq, "ARP Polling Interval (ms): %d\n",
+				bond->params.arp_interval);
+		seq_printf(seq, "ARP Missed Max: %u\n",
+				bond->params.missed_max);
+
+		seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
+
+		for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
+			if (!bond->params.arp_targets[i])
+				break;
+			if (printed)
+				seq_printf(seq, ",");
+			seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
+			printed = 1;
+		}
+		seq_printf(seq, "\n");
+
+#if IS_ENABLED(CONFIG_IPV6)
+		printed = 0;
+		seq_printf(seq, "NS IPv6 target/s (xx::xx form):");
+
+		for (i = 0; (i < BOND_MAX_NS_TARGETS); i++) {
+			if (ipv6_addr_any(&bond->params.ns_targets[i]))
+				break;
+			if (printed)
+				seq_printf(seq, ",");
+			seq_printf(seq, " %pI6c", &bond->params.ns_targets[i]);
+			printed = 1;
+		}
+		seq_printf(seq, "\n");
+#endif
+	}
+
+	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+		struct ad_info ad_info;
+
+		seq_puts(seq, "\n802.3ad info\n");
+		seq_printf(seq, "LACP active: %s\n",
+			   (bond->params.lacp_active) ? "on" : "off");
+		seq_printf(seq, "LACP rate: %s\n",
+			   (bond->params.lacp_fast) ? "fast" : "slow");
+		seq_printf(seq, "Min links: %d\n", bond->params.min_links);
+		optval = bond_opt_get_val(BOND_OPT_AD_SELECT,
+					  bond->params.ad_select);
+		seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
+			   optval->string);
+		if (capable(CAP_NET_ADMIN)) {
+			seq_printf(seq, "System priority: %d\n",
+				   BOND_AD_INFO(bond).system.sys_priority);
+			seq_printf(seq, "System MAC address: %pM\n",
+				   &BOND_AD_INFO(bond).system.sys_mac_addr);
+
+			if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
+				seq_printf(seq,
+					   "bond %s has no active aggregator\n",
+					   bond->dev->name);
+			} else {
+				seq_printf(seq, "Active Aggregator Info:\n");
+
+				seq_printf(seq, "\tAggregator ID: %d\n",
+					   ad_info.aggregator_id);
+				seq_printf(seq, "\tNumber of ports: %d\n",
+					   ad_info.ports);
+				seq_printf(seq, "\tActor Key: %d\n",
+					   ad_info.actor_key);
+				seq_printf(seq, "\tPartner Key: %d\n",
+					   ad_info.partner_key);
+				seq_printf(seq, "\tPartner Mac Address: %pM\n",
+					   ad_info.partner_system);
+			}
+		}
+	}
+}
+
+static void bond_info_show_slave(struct seq_file *seq,
+				 const struct slave *slave)
+{
+	struct bonding *bond = pde_data(file_inode(seq->file));
+
+	seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
+	seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link));
+	if (slave->speed == SPEED_UNKNOWN)
+		seq_printf(seq, "Speed: %s\n", "Unknown");
+	else
+		seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
+
+	if (slave->duplex == DUPLEX_UNKNOWN)
+		seq_printf(seq, "Duplex: %s\n", "Unknown");
+	else
+		seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
+
+	seq_printf(seq, "Link Failure Count: %u\n",
+		   slave->link_failure_count);
+
+	seq_printf(seq, "Permanent HW addr: %*phC\n",
+		   slave->dev->addr_len, slave->perm_hwaddr);
+	seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
+
+	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+		const struct port *port = &SLAVE_AD_INFO(slave)->port;
+		const struct aggregator *agg = port->aggregator;
+
+		if (agg) {
+			seq_printf(seq, "Aggregator ID: %d\n",
+				   agg->aggregator_identifier);
+			seq_printf(seq, "Actor Churn State: %s\n",
+				   bond_3ad_churn_desc(port->sm_churn_actor_state));
+			seq_printf(seq, "Partner Churn State: %s\n",
+				   bond_3ad_churn_desc(port->sm_churn_partner_state));
+			seq_printf(seq, "Actor Churned Count: %d\n",
+				   port->churn_actor_count);
+			seq_printf(seq, "Partner Churned Count: %d\n",
+				   port->churn_partner_count);
+
+			if (capable(CAP_NET_ADMIN)) {
+				seq_puts(seq, "details actor lacp pdu:\n");
+				seq_printf(seq, "    system priority: %d\n",
+					   port->actor_system_priority);
+				seq_printf(seq, "    system mac address: %pM\n",
+					   &port->actor_system);
+				seq_printf(seq, "    port key: %d\n",
+					   port->actor_oper_port_key);
+				seq_printf(seq, "    port priority: %d\n",
+					   port->actor_port_priority);
+				seq_printf(seq, "    port number: %d\n",
+					   port->actor_port_number);
+				seq_printf(seq, "    port state: %d\n",
+					   port->actor_oper_port_state);
+
+				seq_puts(seq, "details partner lacp pdu:\n");
+				seq_printf(seq, "    system priority: %d\n",
+					   port->partner_oper.system_priority);
+				seq_printf(seq, "    system mac address: %pM\n",
+					   &port->partner_oper.system);
+				seq_printf(seq, "    oper key: %d\n",
+					   port->partner_oper.key);
+				seq_printf(seq, "    port priority: %d\n",
+					   port->partner_oper.port_priority);
+				seq_printf(seq, "    port number: %d\n",
+					   port->partner_oper.port_number);
+				seq_printf(seq, "    port state: %d\n",
+					   port->partner_oper.port_state);
+			}
+		} else {
+			seq_puts(seq, "Aggregator ID: N/A\n");
+		}
+	}
+}
+
+static int bond_info_seq_show(struct seq_file *seq, void *v)
+{
+	if (v == SEQ_START_TOKEN) {
+		seq_printf(seq, "%s\n", bond_version);
+		bond_info_show_master(seq);
+	} else
+		bond_info_show_slave(seq, v);
+
+	return 0;
+}
+
+static const struct seq_operations bond_info_seq_ops = {
+	.start = bond_info_seq_start,
+	.next  = bond_info_seq_next,
+	.stop  = bond_info_seq_stop,
+	.show  = bond_info_seq_show,
+};
+
+void bond_create_proc_entry(struct bonding *bond)
+{
+	struct net_device *bond_dev = bond->dev;
+	struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
+
+	if (bn->proc_dir) {
+		bond->proc_entry = proc_create_seq_data(bond_dev->name, 0444,
+				bn->proc_dir, &bond_info_seq_ops, bond);
+		if (bond->proc_entry == NULL)
+			netdev_warn(bond_dev, "Cannot create /proc/net/%s/%s\n",
+				    DRV_NAME, bond_dev->name);
+		else
+			memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
+	}
+}
+
+void bond_remove_proc_entry(struct bonding *bond)
+{
+	struct net_device *bond_dev = bond->dev;
+	struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
+
+	if (bn->proc_dir && bond->proc_entry) {
+		remove_proc_entry(bond->proc_file_name, bn->proc_dir);
+		memset(bond->proc_file_name, 0, IFNAMSIZ);
+		bond->proc_entry = NULL;
+	}
+}
+
+/* Create the bonding directory under /proc/net, if doesn't exist yet.
+ * Caller must hold rtnl_lock.
+ */
+void __net_init bond_create_proc_dir(struct bond_net *bn)
+{
+	if (!bn->proc_dir) {
+		bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
+		if (!bn->proc_dir)
+			pr_warn("Warning: Cannot create /proc/net/%s\n",
+				DRV_NAME);
+	}
+}
+
+/* Destroy the bonding directory under /proc/net, if empty.
+ */
+void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
+{
+	if (bn->proc_dir) {
+		remove_proc_entry(DRV_NAME, bn->net->proc_net);
+		bn->proc_dir = NULL;
+	}
+}
diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
new file mode 100644
index 0000000000..2805135a72
--- /dev/null
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -0,0 +1,851 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/sched/signal.h>
+#include <linux/fs.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
+#include <linux/in.h>
+#include <linux/sysfs.h>
+#include <linux/ctype.h>
+#include <linux/inet.h>
+#include <linux/rtnetlink.h>
+#include <linux/etherdevice.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+#include <linux/nsproxy.h>
+
+#include <net/bonding.h>
+
+#define to_bond(cd)	((struct bonding *)(netdev_priv(to_net_dev(cd))))
+
+/* "show" function for the bond_masters attribute.
+ * The class parameter is ignored.
+ */
+static ssize_t bonding_show_bonds(const struct class *cls,
+				  const struct class_attribute *attr,
+				  char *buf)
+{
+	const struct bond_net *bn =
+		container_of_const(attr, struct bond_net, class_attr_bonding_masters);
+	int res = 0;
+	struct bonding *bond;
+
+	rtnl_lock();
+
+	list_for_each_entry(bond, &bn->dev_list, bond_list) {
+		if (res > (PAGE_SIZE - IFNAMSIZ)) {
+			/* not enough space for another interface name */
+			if ((PAGE_SIZE - res) > 10)
+				res = PAGE_SIZE - 10;
+			res += sysfs_emit_at(buf, res, "++more++ ");
+			break;
+		}
+		res += sysfs_emit_at(buf, res, "%s ", bond->dev->name);
+	}
+	if (res)
+		buf[res-1] = '\n'; /* eat the leftover space */
+
+	rtnl_unlock();
+	return res;
+}
+
+static struct net_device *bond_get_by_name(const struct bond_net *bn, const char *ifname)
+{
+	struct bonding *bond;
+
+	list_for_each_entry(bond, &bn->dev_list, bond_list) {
+		if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
+			return bond->dev;
+	}
+	return NULL;
+}
+
+/* "store" function for the bond_masters attribute.  This is what
+ * creates and deletes entire bonds.
+ *
+ * The class parameter is ignored.
+ */
+static ssize_t bonding_store_bonds(const struct class *cls,
+				   const struct class_attribute *attr,
+				   const char *buffer, size_t count)
+{
+	const struct bond_net *bn =
+		container_of_const(attr, struct bond_net, class_attr_bonding_masters);
+	char command[IFNAMSIZ + 1] = {0, };
+	char *ifname;
+	int rv, res = count;
+
+	sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
+	ifname = command + 1;
+	if ((strlen(command) <= 1) ||
+	    !dev_valid_name(ifname))
+		goto err_no_cmd;
+
+	if (command[0] == '+') {
+		pr_info("%s is being created...\n", ifname);
+		rv = bond_create(bn->net, ifname);
+		if (rv) {
+			if (rv == -EEXIST)
+				pr_info("%s already exists\n", ifname);
+			else
+				pr_info("%s creation failed\n", ifname);
+			res = rv;
+		}
+	} else if (command[0] == '-') {
+		struct net_device *bond_dev;
+
+		rtnl_lock();
+		bond_dev = bond_get_by_name(bn, ifname);
+		if (bond_dev) {
+			pr_info("%s is being deleted...\n", ifname);
+			unregister_netdevice(bond_dev);
+		} else {
+			pr_err("unable to delete non-existent %s\n", ifname);
+			res = -ENODEV;
+		}
+		rtnl_unlock();
+	} else
+		goto err_no_cmd;
+
+	/* Always return either count or an error.  If you return 0, you'll
+	 * get called forever, which is bad.
+	 */
+	return res;
+
+err_no_cmd:
+	pr_err("no command found in bonding_masters - use +ifname or -ifname\n");
+	return -EPERM;
+}
+
+/* class attribute for bond_masters file.  This ends up in /sys/class/net */
+static const struct class_attribute class_attr_bonding_masters = {
+	.attr = {
+		.name = "bonding_masters",
+		.mode = 0644,
+	},
+	.show = bonding_show_bonds,
+	.store = bonding_store_bonds,
+};
+
+/* Generic "store" method for bonding sysfs option setting */
+static ssize_t bonding_sysfs_store_option(struct device *d,
+					  struct device_attribute *attr,
+					  const char *buffer, size_t count)
+{
+	struct bonding *bond = to_bond(d);
+	const struct bond_option *opt;
+	char *buffer_clone;
+	int ret;
+
+	opt = bond_opt_get_by_name(attr->attr.name);
+	if (WARN_ON(!opt))
+		return -ENOENT;
+	buffer_clone = kstrndup(buffer, count, GFP_KERNEL);
+	if (!buffer_clone)
+		return -ENOMEM;
+	ret = bond_opt_tryset_rtnl(bond, opt->id, buffer_clone);
+	if (!ret)
+		ret = count;
+	kfree(buffer_clone);
+
+	return ret;
+}
+
+/* Show the slaves in the current bond. */
+static ssize_t bonding_show_slaves(struct device *d,
+				   struct device_attribute *attr, char *buf)
+{
+	struct bonding *bond = to_bond(d);
+	struct list_head *iter;
+	struct slave *slave;
+	int res = 0;
+
+	if (!rtnl_trylock())
+		return restart_syscall();
+
+	bond_for_each_slave(bond, slave, iter) {
+		if (res > (PAGE_SIZE - IFNAMSIZ)) {
+			/* not enough space for another interface name */
+			if ((PAGE_SIZE - res) > 10)
+				res = PAGE_SIZE - 10;
+			res += sysfs_emit_at(buf, res, "++more++ ");
+			break;
+		}
+		res += sysfs_emit_at(buf, res, "%s ", slave->dev->name);
+	}
+
+	rtnl_unlock();
+
+	if (res)
+		buf[res-1] = '\n'; /* eat the leftover space */
+
+	return res;
+}
+static DEVICE_ATTR(slaves, 0644, bonding_show_slaves,
+		   bonding_sysfs_store_option);
+
+/* Show the bonding mode. */
+static ssize_t bonding_show_mode(struct device *d,
+				 struct device_attribute *attr, char *buf)
+{
+	struct bonding *bond = to_bond(d);
+	const struct bond_opt_value *val;
+
+	val = bond_opt_get_val(BOND_OPT_MODE, BOND_MODE(bond));
+
+	return sysfs_emit(buf, "%s %d\n", val->string, BOND_MODE(bond));
+}
+static DEVICE_ATTR(mode, 0644, bonding_show_mode, bonding_sysfs_store_option);
+
+/* Show the bonding transmit hash method. */
+static ssize_t bonding_show_xmit_hash(struct device *d,
+				      struct device_attribute *attr,
+				      char *buf)
+{
+	struct bonding *bond = to_bond(d);
+	const struct bond_opt_value *val;
+
+	val = bond_opt_get_val(BOND_OPT_XMIT_HASH, bond->params.xmit_policy);
+
+	return sysfs_emit(buf, "%s %d\n", val->string, bond->params.xmit_policy);
+}
+static DEVICE_ATTR(xmit_hash_policy, 0644,
+		   bonding_show_xmit_hash, bonding_sysfs_store_option);
+
+/* Show arp_validate. */
+static ssize_t bonding_show_arp_validate(struct device *d,
+					 struct device_attribute *attr,
+					 char *buf)
+{
+	struct bonding *bond = to_bond(d);
+	const struct bond_opt_value *val;
+
+	val = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
+			       bond->params.arp_validate);
+
+	return sysfs_emit(buf, "%s %d\n", val->string, bond->params.arp_validate);
+}
+static DEVICE_ATTR(arp_validate, 0644, bonding_show_arp_validate,
+		   bonding_sysfs_store_option);
+
+/* Show arp_all_targets. */
+static ssize_t bonding_show_arp_all_targets(struct device *d,
+					 struct device_attribute *attr,
+					 char *buf)
+{
+	struct bonding *bond = to_bond(d);
+	const struct bond_opt_value *val;
+
+	val = bond_opt_get_val(BOND_OPT_ARP_ALL_TARGETS,
+			       bond->params.arp_all_targets);
+	return sysfs_emit(buf, "%s %d\n",
+		       val->string, bond->params.arp_all_targets);
+}
+static DEVICE_ATTR(arp_all_targets, 0644,
+		   bonding_show_arp_all_targets, bonding_sysfs_store_option);
+
+/* Show fail_over_mac. */
+static ssize_t bonding_show_fail_over_mac(struct device *d,
+					  struct device_attribute *attr,
+					  char *buf)
+{
+	struct bonding *bond = to_bond(d);
+	const struct bond_opt_value *val;
+
+	val = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
+			       bond->params.fail_over_mac);
+
+	return sysfs_emit(buf, "%s %d\n", val->string, bond->params.fail_over_mac);
+}
+static DEVICE_ATTR(fail_over_mac, 0644,
+		   bonding_show_fail_over_mac, bonding_sysfs_store_option);
+
+/* Show the arp timer interval. */
+static ssize_t bonding_show_arp_interval(struct device *d,
+					 struct device_attribute *attr,
+					 char *buf)
+{
+	struct bonding *bond = to_bond(d);
+
+	return sysfs_emit(buf, "%d\n", bond->params.arp_interval);
+}
+static DEVICE_ATTR(arp_interval, 0644,
+		   bonding_show_arp_interval, bonding_sysfs_store_option);
+
+/* Show the arp targets. */
+static ssize_t bonding_show_arp_targets(struct device *d,
+					struct device_attribute *attr,
+					char *buf)
+{
+	struct bonding *bond = to_bond(d);
+	int i, res = 0;
+
+	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
+		if (bond->params.arp_targets[i])
+			res += sysfs_emit_at(buf, res, "%pI4 ",
+					     &bond->params.arp_targets[i]);
+	}
+	if (res)
+		buf[res-1] = '\n'; /* eat the leftover space */
+
+	return res;
+}
+static DEVICE_ATTR(arp_ip_target, 0644,
+		   bonding_show_arp_targets, bonding_sysfs_store_option);
+
+/* Show the arp missed max. */
+static ssize_t bonding_show_missed_max(struct device *d,
+				       struct device_attribute *attr,
+				       char *buf)
+{
+	struct bonding *bond = to_bond(d);
+
+	return sysfs_emit(buf, "%u\n", bond->params.missed_max);
+}
+static DEVICE_ATTR(arp_missed_max, 0644,
+		   bonding_show_missed_max, bonding_sysfs_store_option);
+
+/* Show the up and down delays. */
+static ssize_t bonding_show_downdelay(struct device *d,
+				      struct device_attribute *attr,
+				      char *buf)
+{
+	struct bonding *bond = to_bond(d);
+
+	return sysfs_emit(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
+}
+static DEVICE_ATTR(downdelay, 0644,
+		   bonding_show_downdelay, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_updelay(struct device *d,
+				    struct device_attribute *attr,
+				    char *buf)
+{
+	struct bonding *bond = to_bond(d);
+
+	return sysfs_emit(buf, "%d\n", bond->params.updelay * bond->params.miimon);
+
+}
+static DEVICE_ATTR(updelay, 0644,
+		   bonding_show_updelay, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_peer_notif_delay(struct device *d,
+					     struct device_attribute *attr,
+					     char *buf)
+{
+	struct bonding *bond = to_bond(d);
+
+	return sysfs_emit(buf, "%d\n",
+			  bond->params.peer_notif_delay * bond->params.miimon);
+}
+static DEVICE_ATTR(peer_notif_delay, 0644,
+		   bonding_show_peer_notif_delay, bonding_sysfs_store_option);
+
+/* Show the LACP activity and interval. */
+static ssize_t bonding_show_lacp_active(struct device *d,
+					struct device_attribute *attr,
+					char *buf)
+{
+	struct bonding *bond = to_bond(d);
+	const struct bond_opt_value *val;
+
+	val = bond_opt_get_val(BOND_OPT_LACP_ACTIVE, bond->params.lacp_active);
+
+	return sysfs_emit(buf, "%s %d\n", val->string, bond->params.lacp_active);
+}
+static DEVICE_ATTR(lacp_active, 0644,
+		   bonding_show_lacp_active, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_lacp_rate(struct device *d,
+				      struct device_attribute *attr,
+				      char *buf)
+{
+	struct bonding *bond = to_bond(d);
+	const struct bond_opt_value *val;
+
+	val = bond_opt_get_val(BOND_OPT_LACP_RATE, bond->params.lacp_fast);
+
+	return sysfs_emit(buf, "%s %d\n", val->string, bond->params.lacp_fast);
+}
+static DEVICE_ATTR(lacp_rate, 0644,
+		   bonding_show_lacp_rate, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_min_links(struct device *d,
+				      struct device_attribute *attr,
+				      char *buf)
+{
+	struct bonding *bond = to_bond(d);
+
+	return sysfs_emit(buf, "%u\n", bond->params.min_links);
+}
+static DEVICE_ATTR(min_links, 0644,
+		   bonding_show_min_links, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_ad_select(struct device *d,
+				      struct device_attribute *attr,
+				      char *buf)
+{
+	struct bonding *bond = to_bond(d);
+	const struct bond_opt_value *val;
+
+	val = bond_opt_get_val(BOND_OPT_AD_SELECT, bond->params.ad_select);
+
+	return sysfs_emit(buf, "%s %d\n", val->string, bond->params.ad_select);
+}
+static DEVICE_ATTR(ad_select, 0644,
+		   bonding_show_ad_select, bonding_sysfs_store_option);
+
+/* Show the number of peer notifications to send after a failover event. */
+static ssize_t bonding_show_num_peer_notif(struct device *d,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	struct bonding *bond = to_bond(d);
+
+	return sysfs_emit(buf, "%d\n", bond->params.num_peer_notif);
+}
+static DEVICE_ATTR(num_grat_arp, 0644,
+		   bonding_show_num_peer_notif, bonding_sysfs_store_option);
+static DEVICE_ATTR(num_unsol_na, 0644,
+		   bonding_show_num_peer_notif, bonding_sysfs_store_option);
+
+/* Show the MII monitor interval. */
+static ssize_t bonding_show_miimon(struct device *d,
+				   struct device_attribute *attr,
+				   char *buf)
+{
+	struct bonding *bond = to_bond(d);
+
+	return sysfs_emit(buf, "%d\n", bond->params.miimon);
+}
+static DEVICE_ATTR(miimon, 0644,
+		   bonding_show_miimon, bonding_sysfs_store_option);
+
+/* Show the primary slave. */
+static ssize_t bonding_show_primary(struct device *d,
+				    struct device_attribute *attr,
+				    char *buf)
+{
+	struct bonding *bond = to_bond(d);
+	struct slave *primary;
+	int count = 0;
+
+	rcu_read_lock();
+	primary = rcu_dereference(bond->primary_slave);
+	if (primary)
+		count = sysfs_emit(buf, "%s\n", primary->dev->name);
+	rcu_read_unlock();
+
+	return count;
+}
+static DEVICE_ATTR(primary, 0644,
+		   bonding_show_primary, bonding_sysfs_store_option);
+
+/* Show the primary_reselect flag. */
+static ssize_t bonding_show_primary_reselect(struct device *d,
+					     struct device_attribute *attr,
+					     char *buf)
+{
+	struct bonding *bond = to_bond(d);
+	const struct bond_opt_value *val;
+
+	val = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
+			       bond->params.primary_reselect);
+
+	return sysfs_emit(buf, "%s %d\n",
+			  val->string, bond->params.primary_reselect);
+}
+static DEVICE_ATTR(primary_reselect, 0644,
+		   bonding_show_primary_reselect, bonding_sysfs_store_option);
+
+/* Show the use_carrier flag. */
+static ssize_t bonding_show_carrier(struct device *d,
+				    struct device_attribute *attr,
+				    char *buf)
+{
+	struct bonding *bond = to_bond(d);
+
+	return sysfs_emit(buf, "%d\n", bond->params.use_carrier);
+}
+static DEVICE_ATTR(use_carrier, 0644,
+		   bonding_show_carrier, bonding_sysfs_store_option);
+
+
+/* Show currently active_slave. */
+static ssize_t bonding_show_active_slave(struct device *d,
+					 struct device_attribute *attr,
+					 char *buf)
+{
+	struct bonding *bond = to_bond(d);
+	struct net_device *slave_dev;
+	int count = 0;
+
+	rcu_read_lock();
+	slave_dev = bond_option_active_slave_get_rcu(bond);
+	if (slave_dev)
+		count = sysfs_emit(buf, "%s\n", slave_dev->name);
+	rcu_read_unlock();
+
+	return count;
+}
+static DEVICE_ATTR(active_slave, 0644,
+		   bonding_show_active_slave, bonding_sysfs_store_option);
+
+/* Show link status of the bond interface. */
+static ssize_t bonding_show_mii_status(struct device *d,
+				       struct device_attribute *attr,
+				       char *buf)
+{
+	struct bonding *bond = to_bond(d);
+	bool active = netif_carrier_ok(bond->dev);
+
+	return sysfs_emit(buf, "%s\n", active ? "up" : "down");
+}
+static DEVICE_ATTR(mii_status, 0444, bonding_show_mii_status, NULL);
+
+/* Show current 802.3ad aggregator ID. */
+static ssize_t bonding_show_ad_aggregator(struct device *d,
+					  struct device_attribute *attr,
+					  char *buf)
+{
+	int count = 0;
+	struct bonding *bond = to_bond(d);
+
+	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+		struct ad_info ad_info;
+
+		count = sysfs_emit(buf, "%d\n",
+				   bond_3ad_get_active_agg_info(bond, &ad_info)
+				   ?  0 : ad_info.aggregator_id);
+	}
+
+	return count;
+}
+static DEVICE_ATTR(ad_aggregator, 0444, bonding_show_ad_aggregator, NULL);
+
+
+/* Show number of active 802.3ad ports. */
+static ssize_t bonding_show_ad_num_ports(struct device *d,
+					 struct device_attribute *attr,
+					 char *buf)
+{
+	int count = 0;
+	struct bonding *bond = to_bond(d);
+
+	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+		struct ad_info ad_info;
+
+		count = sysfs_emit(buf, "%d\n",
+				   bond_3ad_get_active_agg_info(bond, &ad_info)
+				   ?  0 : ad_info.ports);
+	}
+
+	return count;
+}
+static DEVICE_ATTR(ad_num_ports, 0444, bonding_show_ad_num_ports, NULL);
+
+
+/* Show current 802.3ad actor key. */
+static ssize_t bonding_show_ad_actor_key(struct device *d,
+					 struct device_attribute *attr,
+					 char *buf)
+{
+	int count = 0;
+	struct bonding *bond = to_bond(d);
+
+	if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
+		struct ad_info ad_info;
+
+		count = sysfs_emit(buf, "%d\n",
+				   bond_3ad_get_active_agg_info(bond, &ad_info)
+				   ?  0 : ad_info.actor_key);
+	}
+
+	return count;
+}
+static DEVICE_ATTR(ad_actor_key, 0444, bonding_show_ad_actor_key, NULL);
+
+
+/* Show current 802.3ad partner key. */
+static ssize_t bonding_show_ad_partner_key(struct device *d,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	int count = 0;
+	struct bonding *bond = to_bond(d);
+
+	if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
+		struct ad_info ad_info;
+
+		count = sysfs_emit(buf, "%d\n",
+				   bond_3ad_get_active_agg_info(bond, &ad_info)
+				   ?  0 : ad_info.partner_key);
+	}
+
+	return count;
+}
+static DEVICE_ATTR(ad_partner_key, 0444, bonding_show_ad_partner_key, NULL);
+
+
+/* Show current 802.3ad partner mac. */
+static ssize_t bonding_show_ad_partner_mac(struct device *d,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	int count = 0;
+	struct bonding *bond = to_bond(d);
+
+	if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
+		struct ad_info ad_info;
+
+		if (!bond_3ad_get_active_agg_info(bond, &ad_info))
+			count = sysfs_emit(buf, "%pM\n", ad_info.partner_system);
+	}
+
+	return count;
+}
+static DEVICE_ATTR(ad_partner_mac, 0444, bonding_show_ad_partner_mac, NULL);
+
+/* Show the queue_ids of the slaves in the current bond. */
+static ssize_t bonding_show_queue_id(struct device *d,
+				     struct device_attribute *attr,
+				     char *buf)
+{
+	struct bonding *bond = to_bond(d);
+	struct list_head *iter;
+	struct slave *slave;
+	int res = 0;
+
+	if (!rtnl_trylock())
+		return restart_syscall();
+
+	bond_for_each_slave(bond, slave, iter) {
+		if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
+			/* not enough space for another interface_name:queue_id pair */
+			if ((PAGE_SIZE - res) > 10)
+				res = PAGE_SIZE - 10;
+			res += sysfs_emit_at(buf, res, "++more++ ");
+			break;
+		}
+		res += sysfs_emit_at(buf, res, "%s:%d ",
+				     slave->dev->name, slave->queue_id);
+	}
+	if (res)
+		buf[res-1] = '\n'; /* eat the leftover space */
+
+	rtnl_unlock();
+
+	return res;
+}
+static DEVICE_ATTR(queue_id, 0644, bonding_show_queue_id,
+		   bonding_sysfs_store_option);
+
+
+/* Show the all_slaves_active flag. */
+static ssize_t bonding_show_slaves_active(struct device *d,
+					  struct device_attribute *attr,
+					  char *buf)
+{
+	struct bonding *bond = to_bond(d);
+
+	return sysfs_emit(buf, "%d\n", bond->params.all_slaves_active);
+}
+static DEVICE_ATTR(all_slaves_active, 0644,
+		   bonding_show_slaves_active, bonding_sysfs_store_option);
+
+/* Show the number of IGMP membership reports to send on link failure */
+static ssize_t bonding_show_resend_igmp(struct device *d,
+					struct device_attribute *attr,
+					char *buf)
+{
+	struct bonding *bond = to_bond(d);
+
+	return sysfs_emit(buf, "%d\n", bond->params.resend_igmp);
+}
+static DEVICE_ATTR(resend_igmp, 0644,
+		   bonding_show_resend_igmp, bonding_sysfs_store_option);
+
+
+static ssize_t bonding_show_lp_interval(struct device *d,
+					struct device_attribute *attr,
+					char *buf)
+{
+	struct bonding *bond = to_bond(d);
+
+	return sysfs_emit(buf, "%d\n", bond->params.lp_interval);
+}
+static DEVICE_ATTR(lp_interval, 0644,
+		   bonding_show_lp_interval, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_tlb_dynamic_lb(struct device *d,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	struct bonding *bond = to_bond(d);
+
+	return sysfs_emit(buf, "%d\n", bond->params.tlb_dynamic_lb);
+}
+static DEVICE_ATTR(tlb_dynamic_lb, 0644,
+		   bonding_show_tlb_dynamic_lb, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_packets_per_slave(struct device *d,
+					      struct device_attribute *attr,
+					      char *buf)
+{
+	struct bonding *bond = to_bond(d);
+	unsigned int packets_per_slave = bond->params.packets_per_slave;
+
+	return sysfs_emit(buf, "%u\n", packets_per_slave);
+}
+static DEVICE_ATTR(packets_per_slave, 0644,
+		   bonding_show_packets_per_slave, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_ad_actor_sys_prio(struct device *d,
+					      struct device_attribute *attr,
+					      char *buf)
+{
+	struct bonding *bond = to_bond(d);
+
+	if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
+		return sysfs_emit(buf, "%hu\n", bond->params.ad_actor_sys_prio);
+
+	return 0;
+}
+static DEVICE_ATTR(ad_actor_sys_prio, 0644,
+		   bonding_show_ad_actor_sys_prio, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_ad_actor_system(struct device *d,
+					    struct device_attribute *attr,
+					    char *buf)
+{
+	struct bonding *bond = to_bond(d);
+
+	if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
+		return sysfs_emit(buf, "%pM\n", bond->params.ad_actor_system);
+
+	return 0;
+}
+
+static DEVICE_ATTR(ad_actor_system, 0644,
+		   bonding_show_ad_actor_system, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_ad_user_port_key(struct device *d,
+					     struct device_attribute *attr,
+					     char *buf)
+{
+	struct bonding *bond = to_bond(d);
+
+	if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
+		return sysfs_emit(buf, "%hu\n", bond->params.ad_user_port_key);
+
+	return 0;
+}
+static DEVICE_ATTR(ad_user_port_key, 0644,
+		   bonding_show_ad_user_port_key, bonding_sysfs_store_option);
+
+static struct attribute *per_bond_attrs[] = {
+	&dev_attr_slaves.attr,
+	&dev_attr_mode.attr,
+	&dev_attr_fail_over_mac.attr,
+	&dev_attr_arp_validate.attr,
+	&dev_attr_arp_all_targets.attr,
+	&dev_attr_arp_interval.attr,
+	&dev_attr_arp_ip_target.attr,
+	&dev_attr_downdelay.attr,
+	&dev_attr_updelay.attr,
+	&dev_attr_peer_notif_delay.attr,
+	&dev_attr_lacp_active.attr,
+	&dev_attr_lacp_rate.attr,
+	&dev_attr_ad_select.attr,
+	&dev_attr_xmit_hash_policy.attr,
+	&dev_attr_num_grat_arp.attr,
+	&dev_attr_num_unsol_na.attr,
+	&dev_attr_miimon.attr,
+	&dev_attr_primary.attr,
+	&dev_attr_primary_reselect.attr,
+	&dev_attr_use_carrier.attr,
+	&dev_attr_active_slave.attr,
+	&dev_attr_mii_status.attr,
+	&dev_attr_ad_aggregator.attr,
+	&dev_attr_ad_num_ports.attr,
+	&dev_attr_ad_actor_key.attr,
+	&dev_attr_ad_partner_key.attr,
+	&dev_attr_ad_partner_mac.attr,
+	&dev_attr_queue_id.attr,
+	&dev_attr_all_slaves_active.attr,
+	&dev_attr_resend_igmp.attr,
+	&dev_attr_min_links.attr,
+	&dev_attr_lp_interval.attr,
+	&dev_attr_packets_per_slave.attr,
+	&dev_attr_tlb_dynamic_lb.attr,
+	&dev_attr_ad_actor_sys_prio.attr,
+	&dev_attr_ad_actor_system.attr,
+	&dev_attr_ad_user_port_key.attr,
+	&dev_attr_arp_missed_max.attr,
+	NULL,
+};
+
+static const struct attribute_group bonding_group = {
+	.name = "bonding",
+	.attrs = per_bond_attrs,
+};
+
+/* Initialize sysfs.  This sets up the bonding_masters file in
+ * /sys/class/net.
+ */
+int __net_init bond_create_sysfs(struct bond_net *bn)
+{
+	int ret;
+
+	bn->class_attr_bonding_masters = class_attr_bonding_masters;
+	sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
+
+	ret = netdev_class_create_file_ns(&bn->class_attr_bonding_masters,
+					  bn->net);
+	/* Permit multiple loads of the module by ignoring failures to
+	 * create the bonding_masters sysfs file.  Bonding devices
+	 * created by second or subsequent loads of the module will
+	 * not be listed in, or controllable by, bonding_masters, but
+	 * will have the usual "bonding" sysfs directory.
+	 *
+	 * This is done to preserve backwards compatibility for
+	 * initscripts/sysconfig, which load bonding multiple times to
+	 * configure multiple bonding devices.
+	 */
+	if (ret == -EEXIST) {
+		/* Is someone being kinky and naming a device bonding_master? */
+		if (netdev_name_in_use(bn->net,
+				       class_attr_bonding_masters.attr.name))
+			pr_err("network device named %s already exists in sysfs\n",
+			       class_attr_bonding_masters.attr.name);
+		ret = 0;
+	}
+
+	return ret;
+
+}
+
+/* Remove /sys/class/net/bonding_masters. */
+void __net_exit bond_destroy_sysfs(struct bond_net *bn)
+{
+	netdev_class_remove_file_ns(&bn->class_attr_bonding_masters, bn->net);
+}
+
+/* Initialize sysfs for each bond.  This sets up and registers
+ * the 'bondctl' directory for each individual bond under /sys/class/net.
+ */
+void bond_prepare_sysfs_group(struct bonding *bond)
+{
+	bond->dev->sysfs_groups[0] = &bonding_group;
+}
+
diff --git a/drivers/net/bonding/bond_sysfs_slave.c b/drivers/net/bonding/bond_sysfs_slave.c
new file mode 100644
index 0000000000..313866f2c0
--- /dev/null
+++ b/drivers/net/bonding/bond_sysfs_slave.c
@@ -0,0 +1,140 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*	Sysfs attributes of bond slaves
+ *
+ *      Copyright (c) 2014 Scott Feldman <sfeldma@cumulusnetworks.com>
+ */
+
+#include <linux/capability.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+
+#include <net/bonding.h>
+
+struct slave_attribute {
+	struct attribute attr;
+	ssize_t (*show)(struct slave *, char *);
+};
+
+#define SLAVE_ATTR_RO(_name)					\
+const struct slave_attribute slave_attr_##_name = __ATTR_RO(_name)
+
+static ssize_t state_show(struct slave *slave, char *buf)
+{
+	switch (bond_slave_state(slave)) {
+	case BOND_STATE_ACTIVE:
+		return sysfs_emit(buf, "active\n");
+	case BOND_STATE_BACKUP:
+		return sysfs_emit(buf, "backup\n");
+	default:
+		return sysfs_emit(buf, "UNKNOWN\n");
+	}
+}
+static SLAVE_ATTR_RO(state);
+
+static ssize_t mii_status_show(struct slave *slave, char *buf)
+{
+	return sysfs_emit(buf, "%s\n", bond_slave_link_status(slave->link));
+}
+static SLAVE_ATTR_RO(mii_status);
+
+static ssize_t link_failure_count_show(struct slave *slave, char *buf)
+{
+	return sysfs_emit(buf, "%d\n", slave->link_failure_count);
+}
+static SLAVE_ATTR_RO(link_failure_count);
+
+static ssize_t perm_hwaddr_show(struct slave *slave, char *buf)
+{
+	return sysfs_emit(buf, "%*phC\n",
+		       slave->dev->addr_len,
+		       slave->perm_hwaddr);
+}
+static SLAVE_ATTR_RO(perm_hwaddr);
+
+static ssize_t queue_id_show(struct slave *slave, char *buf)
+{
+	return sysfs_emit(buf, "%d\n", slave->queue_id);
+}
+static SLAVE_ATTR_RO(queue_id);
+
+static ssize_t ad_aggregator_id_show(struct slave *slave, char *buf)
+{
+	const struct aggregator *agg;
+
+	if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
+		agg = SLAVE_AD_INFO(slave)->port.aggregator;
+		if (agg)
+			return sysfs_emit(buf, "%d\n",
+					  agg->aggregator_identifier);
+	}
+
+	return sysfs_emit(buf, "N/A\n");
+}
+static SLAVE_ATTR_RO(ad_aggregator_id);
+
+static ssize_t ad_actor_oper_port_state_show(struct slave *slave, char *buf)
+{
+	const struct port *ad_port;
+
+	if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
+		ad_port = &SLAVE_AD_INFO(slave)->port;
+		if (ad_port->aggregator)
+			return sysfs_emit(buf, "%u\n",
+				       ad_port->actor_oper_port_state);
+	}
+
+	return sysfs_emit(buf, "N/A\n");
+}
+static SLAVE_ATTR_RO(ad_actor_oper_port_state);
+
+static ssize_t ad_partner_oper_port_state_show(struct slave *slave, char *buf)
+{
+	const struct port *ad_port;
+
+	if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
+		ad_port = &SLAVE_AD_INFO(slave)->port;
+		if (ad_port->aggregator)
+			return sysfs_emit(buf, "%u\n",
+				       ad_port->partner_oper.port_state);
+	}
+
+	return sysfs_emit(buf, "N/A\n");
+}
+static SLAVE_ATTR_RO(ad_partner_oper_port_state);
+
+static const struct attribute *slave_attrs[] = {
+	&slave_attr_state.attr,
+	&slave_attr_mii_status.attr,
+	&slave_attr_link_failure_count.attr,
+	&slave_attr_perm_hwaddr.attr,
+	&slave_attr_queue_id.attr,
+	&slave_attr_ad_aggregator_id.attr,
+	&slave_attr_ad_actor_oper_port_state.attr,
+	&slave_attr_ad_partner_oper_port_state.attr,
+	NULL
+};
+
+#define to_slave_attr(_at) container_of(_at, struct slave_attribute, attr)
+
+static ssize_t slave_show(struct kobject *kobj,
+			  struct attribute *attr, char *buf)
+{
+	struct slave_attribute *slave_attr = to_slave_attr(attr);
+	struct slave *slave = to_slave(kobj);
+
+	return slave_attr->show(slave, buf);
+}
+
+const struct sysfs_ops slave_sysfs_ops = {
+	.show = slave_show,
+};
+
+int bond_sysfs_slave_add(struct slave *slave)
+{
+	return sysfs_create_files(&slave->kobj, slave_attrs);
+}
+
+void bond_sysfs_slave_del(struct slave *slave)
+{
+	sysfs_remove_files(&slave->kobj, slave_attrs);
+}
diff --git a/drivers/net/bonding/bonding_priv.h b/drivers/net/bonding/bonding_priv.h
new file mode 100644
index 0000000000..fef6288c69
--- /dev/null
+++ b/drivers/net/bonding/bonding_priv.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-1.0+ */
+/*
+ * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
+ *
+ * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
+ * NCM: Network and Communications Management, Inc.
+ *
+ * BUT, I'm the one who modified it for ethernet, so:
+ * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
+ *
+ */
+
+#ifndef _BONDING_PRIV_H
+#define _BONDING_PRIV_H
+#include <generated/utsrelease.h>
+
+#define DRV_NAME	"bonding"
+#define DRV_DESCRIPTION	"Ethernet Channel Bonding Driver"
+
+#define bond_version DRV_DESCRIPTION ": v" UTS_RELEASE "\n"
+
+#endif