Adding upstream version 5.10.209.upstream/5.10.209upstream

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

1 files changed, 2770 insertions, 0 deletions

diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
new file mode 100644
index 000000000..320e54618
--- /dev/null
+++ b/drivers/net/bonding/bond_3ad.c
@@ -0,0 +1,2770 @@
+// 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,
+};
+
+/* 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 u16 ad_ticks_per_sec;
+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);
+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
+ */
+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;
+
+		default:
+			/* unknown speed value from ethtool. shouldn't happen */
+			if (slave->speed != SPEED_UNKNOWN)
+				pr_warn_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;
+		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
+ *
+ * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
+ */
+static void ad_periodic_machine(struct port *port)
+{
+	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))
+	   ) {
+		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
+ * @tick_resolution: tick duration (millisecond resolution)
+ *
+ * Can be called only after the mac address of the bond is set.
+ */
+void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
+{
+	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);
+
+	/* initialize how many times this module is called in one
+	 * second (should be about every 100ms)
+	 */
+	ad_ticks_per_sec = tick_resolution;
+
+	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);
+		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;
+}