Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 2508 insertions, 0 deletions

diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
new file mode 100644
index 00000000..3463b469
--- /dev/null
+++ b/drivers/net/bonding/bond_3ad.c
@@ -0,0 +1,2508 @@
+/*
+ * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#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 "bonding.h"
+#include "bond_3ad.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 state definitions(43.4.2.2 in the 802.3ad standard)
+#define AD_STATE_LACP_ACTIVITY   0x1
+#define AD_STATE_LACP_TIMEOUT    0x2
+#define AD_STATE_AGGREGATION     0x4
+#define AD_STATE_SYNCHRONIZATION 0x8
+#define AD_STATE_COLLECTING      0x10
+#define AD_STATE_DISTRIBUTING    0x20
+#define AD_STATE_DEFAULTED       0x40
+#define AD_STATE_EXPIRED         0x80
+
+// 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
+
+// Port Key definitions
+// key is determined according to the link speed, duplex and
+// user key(which is yet not supported)
+//              ------------------------------------------------------------
+// Port key :   | User key                       |      Speed       |Duplex|
+//              ------------------------------------------------------------
+//              16                               6               1 0
+#define  AD_DUPLEX_KEY_BITS    0x1
+#define  AD_SPEED_KEY_BITS     0x3E
+#define  AD_USER_KEY_BITS      0xFFC0
+
+//dalloun
+#define     AD_LINK_SPEED_BITMASK_1MBPS       0x1
+#define     AD_LINK_SPEED_BITMASK_10MBPS      0x2
+#define     AD_LINK_SPEED_BITMASK_100MBPS     0x4
+#define     AD_LINK_SPEED_BITMASK_1000MBPS    0x8
+#define     AD_LINK_SPEED_BITMASK_10000MBPS   0x10
+//endalloun
+
+// compare MAC addresses
+#define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN)
+
+static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } };
+static u16 ad_ticks_per_sec;
+static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
+
+static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
+
+// ================= 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);
+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);
+static void ad_agg_selection_logic(struct aggregator *aggregator);
+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);
+static void ad_disable_collecting_distributing(struct port *port);
+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);
+
+
+/////////////////////////////////////////////////////////////////////////////////
+// ================= 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_port - get the first port in the bond
+ * @bond: the bond we're looking at
+ *
+ * Return the port of the first slave in @bond, or %NULL if it can't be found.
+ */
+static inline struct port *__get_first_port(struct bonding *bond)
+{
+	if (bond->slave_cnt == 0)
+		return NULL;
+
+	return &(SLAVE_AD_INFO(bond->first_slave).port);
+}
+
+/**
+ * __get_next_port - get the next port in the bond
+ * @port: the port we're looking at
+ *
+ * Return the port of the slave that is next in line of @port's slave in the
+ * bond, or %NULL if it can't be found.
+ */
+static inline struct port *__get_next_port(struct port *port)
+{
+	struct bonding *bond = __get_bond_by_port(port);
+	struct slave *slave = port->slave;
+
+	// If there's no bond for this port, or this is the last slave
+	if ((bond == NULL) || (slave->next == bond->first_slave))
+		return NULL;
+
+	return &(SLAVE_AD_INFO(slave->next).port);
+}
+
+/**
+ * __get_first_agg - get the first aggregator in the bond
+ * @bond: the bond we're looking at
+ *
+ * Return the aggregator of the first slave in @bond, or %NULL if it can't be
+ * found.
+ */
+static inline struct aggregator *__get_first_agg(struct port *port)
+{
+	struct bonding *bond = __get_bond_by_port(port);
+
+	// If there's no bond for this port, or bond has no slaves
+	if ((bond == NULL) || (bond->slave_cnt == 0))
+		return NULL;
+
+	return &(SLAVE_AD_INFO(bond->first_slave).aggregator);
+}
+
+/**
+ * __get_next_agg - get the next aggregator in the bond
+ * @aggregator: the aggregator we're looking at
+ *
+ * Return the aggregator of the slave that is next in line of @aggregator's
+ * slave in the bond, or %NULL if it can't be found.
+ */
+static inline struct aggregator *__get_next_agg(struct aggregator *aggregator)
+{
+	struct slave *slave = aggregator->slave;
+	struct bonding *bond = bond_get_bond_by_slave(slave);
+
+	// If there's no bond for this aggregator, or this is the last slave
+	if ((bond == NULL) || (slave->next == bond->first_slave))
+		return NULL;
+
+	return &(SLAVE_AD_INFO(slave->next).aggregator);
+}
+
+/*
+ * __agg_has_partner
+ *
+ * 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);
+}
+
+/**
+ * __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) && IS_UP(slave->dev))
+		bond_set_slave_active_flags(slave);
+}
+
+/**
+ * __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 BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
+}
+
+/**
+ * __get_state_machine_lock - lock the port's state machines
+ * @port: the port we're looking at
+ *
+ */
+static inline void __get_state_machine_lock(struct port *port)
+{
+	spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
+}
+
+/**
+ * __release_state_machine_lock - unlock the port's state machines
+ * @port: the port we're looking at
+ *
+ */
+static inline void __release_state_machine_lock(struct port *port)
+{
+	spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
+}
+
+/**
+ * __get_link_speed - get a port's speed
+ * @port: the port we're looking at
+ *
+ * Return @port's speed in 802.3ad bitmask format. i.e. one of:
+ *     0,
+ *     %AD_LINK_SPEED_BITMASK_10MBPS,
+ *     %AD_LINK_SPEED_BITMASK_100MBPS,
+ *     %AD_LINK_SPEED_BITMASK_1000MBPS,
+ *     %AD_LINK_SPEED_BITMASK_10000MBPS
+ */
+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_BITMASK_10MBPS;
+			break;
+
+		case SPEED_100:
+			speed = AD_LINK_SPEED_BITMASK_100MBPS;
+			break;
+
+		case SPEED_1000:
+			speed = AD_LINK_SPEED_BITMASK_1000MBPS;
+			break;
+
+		case SPEED_10000:
+			speed = AD_LINK_SPEED_BITMASK_10000MBPS;
+			break;
+
+		default:
+			speed = 0; // unknown speed value from ethtool. shouldn't happen
+			break;
+		}
+	}
+
+	pr_debug("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;
+
+	//  handling a special case: when the configuration starts with
+	// link down, it sets the duplex to 0.
+	if (slave->link != BOND_LINK_UP)
+		retval = 0x0;
+	else {
+		switch (slave->duplex) {
+		case DUPLEX_FULL:
+			retval = 0x1;
+			pr_debug("Port %d Received status full duplex update from adapter\n",
+				 port->actor_port_number);
+			break;
+		case DUPLEX_HALF:
+		default:
+			retval = 0x0;
+			pr_debug("Port %d Received status NOT full duplex update from adapter\n",
+				 port->actor_port_number);
+			break;
+		}
+	}
+	return retval;
+}
+
+/**
+ * __initialize_port_locks - initialize a port's STATE machine spinlock
+ * @port: the port we're looking at
+ *
+ */
+static inline void __initialize_port_locks(struct port *port)
+{
+	// make sure it isn't called twice
+	spin_lock_init(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
+}
+
+//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); // short timeout
+		else
+			retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout
+		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
+	if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
+	     (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
+	     !MAC_ADDRESS_COMPARE(&(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 & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
+	    // or this is individual link(aggregation == FALSE)
+	    ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
+		) {
+		// update the state machine Matched variable
+		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 &= ~AD_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 & AD_STATE_SYNCHRONIZATION))
+			partner->port_state |= AD_STATE_SYNCHRONIZATION;
+		else
+			partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
+	}
+}
+
+/**
+ * __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 |= AD_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
+		if (ntohs(lacpdu->actor_port) != partner->port_number ||
+		    ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
+		    MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system) ||
+		    ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
+		    ntohs(lacpdu->actor_key) != partner->key ||
+		    (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
+			// update the state machine Selected variable
+			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
+		if (admin->port_number != oper->port_number ||
+		    admin->port_priority != oper->port_priority ||
+		    MAC_ADDRESS_COMPARE(&admin->system, &oper->system) ||
+		    admin->system_priority != oper->system_priority ||
+		    admin->key != oper->key ||
+		    (admin->port_state & AD_STATE_AGGREGATION)
+			!= (oper->port_state & AD_STATE_AGGREGATION)) {
+			// update the state machine Selected variable
+			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
+		if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
+		    (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
+		    MAC_ADDRESS_COMPARE(&(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 & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
+		    ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
+		    ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
+		    ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
+		   ) {
+
+			port->ntt = true;
+		}
+	}
+}
+
+/**
+ * __attach_bond_to_agg
+ * @port: the port we're looking at
+ *
+ * Handle the attaching of the port's control parser/multiplexer and the
+ * aggregator. This function does nothing since the parser/multiplexer of the
+ * receive and the parser/multiplexer of the aggregator are already combined.
+ */
+static void __attach_bond_to_agg(struct port *port)
+{
+	port = NULL; /* just to satisfy the compiler */
+	// This function does nothing since the parser/multiplexer of the receive
+	// and the parser/multiplexer of the aggregator are already combined
+}
+
+/**
+ * __detach_bond_from_agg
+ * @port: the port we're looking at
+ *
+ * Handle the detaching of the port's control parser/multiplexer from the
+ * aggregator. This function does nothing since the parser/multiplexer of the
+ * receive and the parser/multiplexer of the aggregator are already combined.
+ */
+static void __detach_bond_from_agg(struct port *port)
+{
+	port = NULL; /* just to satisfy the compiler */
+	// This function does nothing since the parser/multiplexer of the receive
+	// and the parser/multiplexer of the aggregator are already combined
+}
+
+/**
+ * __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;
+	}
+}
+
+/**
+ * __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)
+{
+	u32 bandwidth = 0;
+
+	if (aggregator->num_of_ports) {
+		switch (__get_link_speed(aggregator->lag_ports)) {
+		case AD_LINK_SPEED_BITMASK_1MBPS:
+			bandwidth = aggregator->num_of_ports;
+			break;
+		case AD_LINK_SPEED_BITMASK_10MBPS:
+			bandwidth = aggregator->num_of_ports * 10;
+			break;
+		case AD_LINK_SPEED_BITMASK_100MBPS:
+			bandwidth = aggregator->num_of_ports * 100;
+			break;
+		case AD_LINK_SPEED_BITMASK_1000MBPS:
+			bandwidth = aggregator->num_of_ports * 1000;
+			break;
+		case AD_LINK_SPEED_BITMASK_10000MBPS:
+			bandwidth = aggregator->num_of_ports * 10000;
+			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
+ *
+ */
+static struct aggregator *__get_active_agg(struct aggregator *aggregator)
+{
+	struct aggregator *retval = NULL;
+
+	for (; aggregator; aggregator = __get_next_agg(aggregator)) {
+		if (aggregator->is_active) {
+			retval = aggregator;
+			break;
+		}
+	}
+
+	return retval;
+}
+
+/**
+ * __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;
+
+	/* 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;
+
+	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 = (struct lacpdu_header *)skb_put(skb, length);
+
+	memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
+	/* Note: source address is set to be the member's PERMANENT address,
+	   because we use it to identify loopback lacpdus in receive. */
+	memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
+	lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
+
+	lacpdu_header->lacpdu = port->lacpdu; // struct copy
+
+	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;
+
+	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 = (struct bond_marker_header *)skb_put(skb, length);
+
+	memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
+	/* Note: source address is set to be the member's PERMANENT address,
+	   because we use it to identify loopback MARKERs in receive. */
+	memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
+	marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
+
+	marker_header->marker = *marker; // struct copy
+
+	dev_queue_xmit(skb);
+
+	return 0;
+}
+
+/**
+ * ad_mux_machine - handle a port's mux state machine
+ * @port: the port we're looking at
+ *
+ */
+static void ad_mux_machine(struct port *port)
+{
+	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;		 // next state
+	} 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; // next state
+			break;
+		case AD_MUX_WAITING:
+			// if SELECTED == FALSE return to DETACH state
+			if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED
+				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;	 // next state
+				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;	 // next state
+			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 & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) {
+				port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state
+			} 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;// next state
+			}
+			break;
+		case AD_MUX_COLLECTING_DISTRIBUTING:
+			if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) ||
+			    !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)
+			   ) {
+				port->sm_mux_state = AD_MUX_ATTACHED;// next state
+
+			} 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);
+				}
+			}
+			break;
+		default:    //to silence the compiler
+			break;
+		}
+	}
+
+	// check if the state machine was changed
+	if (port->sm_mux_state != last_state) {
+		pr_debug("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:
+			__detach_bond_from_agg(port);
+			port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
+			ad_disable_collecting_distributing(port);
+			port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
+			port->actor_oper_port_state &= ~AD_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:
+			__attach_bond_to_agg(port);
+			port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
+			port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
+			port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
+			ad_disable_collecting_distributing(port);
+			port->ntt = true;
+			break;
+		case AD_MUX_COLLECTING_DISTRIBUTING:
+			port->actor_oper_port_state |= AD_STATE_COLLECTING;
+			port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
+			ad_enable_collecting_distributing(port);
+			port->ntt = true;
+			break;
+		default:    //to silence the compiler
+			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;
+
+	// check if state machine should change state
+	// first, check if port was reinitialized
+	if (port->sm_vars & AD_PORT_BEGIN)
+		/* next state */
+		port->sm_rx_state = AD_RX_INITIALIZE;
+	// check if port is not enabled
+	else if (!(port->sm_vars & AD_PORT_BEGIN)
+		 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
+		/* next state */
+		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))) {
+		port->sm_rx_timer_counter = 0; // zero timer
+		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;		// next state
+				break;
+			case AD_RX_CURRENT:
+				port->sm_rx_state = AD_RX_EXPIRED;	    // next state
+				break;
+			default:    //to silence the compiler
+				break;
+			}
+		} else {
+			// if no lacpdu arrived and no timer is on
+			switch (port->sm_rx_state) {
+			case AD_RX_PORT_DISABLED:
+				if (port->sm_vars & AD_PORT_MOVED)
+					port->sm_rx_state = AD_RX_INITIALIZE;	    // next state
+				else if (port->is_enabled
+					 && (port->sm_vars
+					     & AD_PORT_LACP_ENABLED))
+					port->sm_rx_state = AD_RX_EXPIRED;	// next state
+				else if (port->is_enabled
+					 && ((port->sm_vars
+					      & AD_PORT_LACP_ENABLED) == 0))
+					port->sm_rx_state = AD_RX_LACP_DISABLED;    // next state
+				break;
+			default:    //to silence the compiler
+				break;
+
+			}
+		}
+	}
+
+	// check if the State machine was changed or new lacpdu arrived
+	if ((port->sm_rx_state != last_state) || (lacpdu)) {
+		pr_debug("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_BITS))
+				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 &= ~AD_STATE_EXPIRED;
+			port->sm_vars &= ~AD_PORT_MOVED;
+			port->sm_rx_state = AD_RX_PORT_DISABLED;	// next state
+
+			/*- Fall Through -*/
+
+		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 &= ~AD_STATE_AGGREGATION;
+			port->sm_vars |= AD_PORT_MATCHED;
+			port->actor_oper_port_state &= ~AD_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 &= ~AD_STATE_SYNCHRONIZATION;
+			port->sm_vars &= ~AD_PORT_MATCHED;
+			port->partner_oper.port_state |=
+				AD_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 |= AD_STATE_EXPIRED;
+			break;
+		case AD_RX_DEFAULTED:
+			__update_default_selected(port);
+			__record_default(port);
+			port->sm_vars |= AD_PORT_MATCHED;
+			port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
+			break;
+		case AD_RX_CURRENT:
+			// detect loopback situation
+			if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) {
+				// INFO_RECEIVED_LOOPBACK_FRAMES
+				pr_err("%s: An illegal loopback occurred on adapter (%s).\n"
+				       "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
+				       port->slave->dev->master->name, port->slave->dev->name);
+				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 & AD_STATE_LACP_TIMEOUT));
+			port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
+			break;
+		default:    //to silence the compiler
+			break;
+		}
+	}
+}
+
+/**
+ * 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) {
+				pr_debug("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 & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
+	   ) {
+		port->sm_periodic_state = AD_NO_PERIODIC;	     // next state
+	}
+	// 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;    // next state
+		} 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
+				      & AD_STATE_LACP_TIMEOUT))
+					port->sm_periodic_state = AD_SLOW_PERIODIC;  // next state
+				break;
+			case AD_SLOW_PERIODIC:
+				if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
+					// stop current timer
+					port->sm_periodic_timer_counter = 0;
+					port->sm_periodic_state = AD_PERIODIC_TX;	 // next state
+				}
+				break;
+			default:    //to silence the compiler
+				break;
+			}
+		}
+	} else {
+		switch (port->sm_periodic_state) {
+		case AD_NO_PERIODIC:
+			port->sm_periodic_state = AD_FAST_PERIODIC;	 // next state
+			break;
+		case AD_PERIODIC_TX:
+			if (!(port->partner_oper.port_state
+			      & AD_STATE_LACP_TIMEOUT))
+				port->sm_periodic_state = AD_SLOW_PERIODIC;  // next state
+			else
+				port->sm_periodic_state = AD_FAST_PERIODIC;  // next state
+			break;
+		default:    //to silence the compiler
+			break;
+		}
+	}
+
+	// check if the state machine was changed
+	if (port->sm_periodic_state != last_state) {
+		pr_debug("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;	   // zero timer
+			break;
+		case AD_FAST_PERIODIC:
+			port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
+			break;
+		case AD_SLOW_PERIODIC:
+			port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
+			break;
+		case AD_PERIODIC_TX:
+			port->ntt = true;
+			break;
+		default:    //to silence the compiler
+			break;
+		}
+	}
+}
+
+/**
+ * ad_port_selection_logic - select aggregation groups
+ * @port: the port we're looking at
+ *
+ * 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)
+{
+	struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
+	struct port *last_port = NULL, *curr_port;
+	int found = 0;
+
+	// if the port is already Selected, do nothing
+	if (port->sm_vars & AD_PORT_SELECTED)
+		return;
+
+	// 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 (!last_port) {// if it is the first port attached to the aggregator
+					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;
+
+				pr_debug("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
+			pr_warning("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
+				   port->slave->dev->master->name,
+				   port->actor_port_number,
+				   port->slave->dev->name,
+				   port->aggregator->aggregator_identifier);
+		}
+	}
+	// search on all aggregators for a suitable aggregator for this port
+	for (aggregator = __get_first_agg(port); aggregator;
+	     aggregator = __get_next_agg(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_COMPARE(&(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_COMPARE(&(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;
+			pr_debug("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_BITS)
+				/* 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;
+
+			pr_debug("Port %d joined LAG %d(new LAG)\n",
+				 port->actor_port_number,
+				 port->aggregator->aggregator_identifier);
+		} else {
+			pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n",
+			       port->slave->dev->master->name,
+			       port->actor_port_number, port->slave->dev->name);
+		}
+	}
+	// 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);
+}
+
+/*
+ * 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 (curr->num_of_ports > best->num_of_ports)
+			return curr;
+
+		if (curr->num_of_ports < best->num_of_ports)
+			return best;
+
+		/*FALLTHROUGH*/
+	case BOND_AD_STABLE:
+	case BOND_AD_BANDWIDTH:
+		if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
+			return curr;
+
+		break;
+
+	default:
+		pr_warning("%s: Impossible agg select mode %d\n",
+			   curr->slave->dev->master->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;
+	return (netif_running(port->slave->dev) &&
+		netif_carrier_ok(port->slave->dev));
+}
+
+/**
+ * ad_agg_selection_logic - select an aggregation group for a team
+ * @aggregator: the aggregator we're looking at
+ *
+ * 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)
+{
+	struct aggregator *best, *active, *origin;
+	struct port *port;
+
+	origin = agg;
+	active = __get_active_agg(agg);
+	best = (active && agg_device_up(active)) ? active : NULL;
+
+	do {
+		agg->is_active = 0;
+
+		if (agg->num_of_ports && agg_device_up(agg))
+			best = ad_agg_selection_test(best, agg);
+
+	} while ((agg = __get_next_agg(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 &&
+		    active->lag_ports->is_enabled &&
+		    (__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) {
+		pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
+			 best->aggregator_identifier, best->num_of_ports,
+			 best->actor_oper_aggregator_key,
+			 best->partner_oper_aggregator_key,
+			 best->is_individual, best->is_active);
+		pr_debug("best ports %p slave %p %s\n",
+			 best->lag_ports, best->slave,
+			 best->slave ? best->slave->dev->name : "NULL");
+
+		for (agg = __get_first_agg(best->lag_ports); agg;
+		     agg = __get_next_agg(agg)) {
+
+			pr_debug("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 replys
+		if (best->is_individual) {
+			pr_warning("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
+				   best->slave ? best->slave->dev->master->name : "NULL");
+		}
+
+		best->is_active = 1;
+		pr_debug("LAG %d chosen as the active LAG\n",
+			 best->aggregator_identifier);
+		pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
+			 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);
+			}
+		}
+	}
+
+	/*
+	 * 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);
+			}
+		}
+	}
+
+	if (origin->slave) {
+		struct bonding *bond;
+
+		bond = bond_get_bond_by_slave(origin->slave);
+		if (bond)
+			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;
+		aggregator->partner_system = null_mac_addr;
+		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("LAG %d was cleared\n",
+			 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);
+
+		aggregator->aggregator_mac_address = null_mac_addr;
+		aggregator->aggregator_identifier = 0;
+		aggregator->slave = NULL;
+	}
+}
+
+/**
+ * ad_initialize_port - initialize a given port's parameters
+ * @aggregator: the aggregator 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_number = 1;
+		port->actor_port_priority = 0xff;
+		port->actor_system = null_mac_addr;
+		port->actor_system_priority = 0xffff;
+		port->actor_port_aggregator_identifier = 0;
+		port->ntt = false;
+		port->actor_admin_port_key = 1;
+		port->actor_oper_port_key  = 1;
+		port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
+		port->actor_oper_port_state  = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
+
+		if (lacp_fast)
+			port->actor_oper_port_state |= AD_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 = 0x3;
+		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->sm_tx_timer_counter = 0;
+		port->slave = NULL;
+		port->aggregator = NULL;
+		port->next_port_in_aggregator = NULL;
+		port->transaction_id = 0;
+
+		memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
+	}
+}
+
+/**
+ * ad_enable_collecting_distributing - enable a port's transmit/receive
+ * @port: the port we're looking at
+ *
+ * Enable @port if it's in an active aggregator
+ */
+static void ad_enable_collecting_distributing(struct port *port)
+{
+	if (port->aggregator->is_active) {
+		pr_debug("Enabling port %d(LAG %d)\n",
+			 port->actor_port_number,
+			 port->aggregator->aggregator_identifier);
+		__enable_port(port);
+	}
+}
+
+/**
+ * ad_disable_collecting_distributing - disable a port's transmit/receive
+ * @port: the port we're looking at
+ *
+ */
+static void ad_disable_collecting_distributing(struct port *port)
+{
+	if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) {
+		pr_debug("Disabling port %d(LAG %d)\n",
+			 port->actor_port_number,
+			 port->aggregator->aggregator_identifier);
+		__disable_port(port);
+	}
+}
+
+#if 0
+/**
+ * ad_marker_info_send - send a marker information frame
+ * @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_info_send(struct port *port)
+{
+	struct bond_marker marker;
+	u16 index;
+
+	// fill the marker PDU with the appropriate values
+	marker.subtype = 0x02;
+	marker.version_number = 0x01;
+	marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE;
+	marker.marker_length = 0x16;
+	// convert requester_port to Big Endian
+	marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8));
+	marker.requester_system = port->actor_system;
+	// convert requester_port(u32) to Big Endian
+	marker.requester_transaction_id =
+		(((++port->transaction_id & 0xFF) << 24)
+		 | ((port->transaction_id & 0xFF00) << 8)
+		 | ((port->transaction_id & 0xFF0000) >> 8)
+		 | ((port->transaction_id & 0xFF000000) >> 24));
+	marker.pad = 0;
+	marker.tlv_type_terminator = 0x00;
+	marker.terminator_length = 0x00;
+	for (index = 0; index < 90; index++)
+		marker.reserved_90[index] = 0;
+
+	// send the marker information
+	if (ad_marker_send(port, &marker) >= 0) {
+		pr_debug("Sent Marker Information on port %d\n",
+			 port->actor_port_number);
+	}
+}
+#endif
+
+/**
+ * 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;
+
+	// copy the received marker data to the response marker
+	//marker = *marker_info;
+	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) {
+		pr_debug("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)
+{
+	marker = NULL; /* just to satisfy the compiler */
+	port = NULL;  /* just to satisfy the compiler */
+	// 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(struct bonding *bond)
+ *
+ * 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)
+{
+	BOND_AD_INFO(bond).agg_select_timer = timeout;
+}
+
+static u16 aggregator_identifier;
+
+/**
+ * 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)
+{
+	// check that the bond is not initialized yet
+	if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr),
+				bond->dev->dev_addr)) {
+
+		aggregator_identifier = 0;
+
+		BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
+		BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
+
+		// 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
+ */
+int bond_3ad_bind_slave(struct slave *slave)
+{
+	struct bonding *bond = bond_get_bond_by_slave(slave);
+	struct port *port;
+	struct aggregator *aggregator;
+
+	if (bond == NULL) {
+		pr_err("%s: The slave %s is not attached to its bond\n",
+		       slave->dev->master->name, slave->dev->name);
+		return -1;
+	}
+
+	//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(which is yet not supported)
+		//              ------------------------------------------------------------
+		// Port key :   | User key                       |      Speed       |Duplex|
+		//              ------------------------------------------------------------
+		//              16                               6               1 0
+		port->actor_admin_port_key = 0;	// initialize this parameter
+		port->actor_admin_port_key |= __get_duplex(port);
+		port->actor_admin_port_key |= (__get_link_speed(port) << 1);
+		port->actor_oper_port_key = port->actor_admin_port_key;
+		// if the port is not full duplex, then the port should be not lacp Enabled
+		if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
+			port->sm_vars &= ~AD_PORT_LACP_ENABLED;
+		// actor system is the bond's system
+		port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
+		// 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;
+		port->aggregator = NULL;
+		port->next_port_in_aggregator = NULL;
+
+		__disable_port(port);
+		__initialize_port_locks(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 = (++aggregator_identifier);
+		aggregator->slave = slave;
+		aggregator->is_active = 0;
+		aggregator->num_of_ports = 0;
+	}
+
+	return 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;
+
+	// find the aggregator related to this slave
+	aggregator = &(SLAVE_AD_INFO(slave).aggregator);
+
+	// find the port related to this slave
+	port = &(SLAVE_AD_INFO(slave).port);
+
+	// if slave is null, the whole port is not initialized
+	if (!port->slave) {
+		pr_warning("Warning: %s: Trying to unbind an uninitialized port on %s\n",
+			   slave->dev->master->name, slave->dev->name);
+		return;
+	}
+
+	pr_debug("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 &= ~AD_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)
+			new_aggregator = __get_first_agg(port);
+			for (; new_aggregator; new_aggregator = __get_next_agg(new_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 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))) {
+				pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n",
+					 aggregator->aggregator_identifier,
+					 new_aggregator->aggregator_identifier);
+
+				if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) {
+					pr_info("%s: Removing an active aggregator\n",
+						aggregator->slave->dev->master->name);
+					// select new active aggregator
+					 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;
+				}
+
+				// clear the aggregator
+				ad_clear_agg(aggregator);
+
+				if (select_new_active_agg)
+					ad_agg_selection_logic(__get_first_agg(port));
+			} else {
+				pr_warning("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n",
+					   slave->dev->master->name);
+			}
+		} 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;
+			// clear the aggregator
+			ad_clear_agg(aggregator);
+			if (select_new_active_agg) {
+				pr_info("%s: Removing an active aggregator\n",
+					slave->dev->master->name);
+				// select new active aggregator
+				ad_agg_selection_logic(__get_first_agg(port));
+			}
+		}
+	}
+
+	pr_debug("Unbinding port %d\n", port->actor_port_number);
+	// find the aggregator that this port is connected to
+	temp_aggregator = __get_first_agg(port);
+	for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_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 (temp_aggregator->num_of_ports == 0) {
+					select_new_active_agg = temp_aggregator->is_active;
+					// clear the aggregator
+					ad_clear_agg(temp_aggregator);
+					if (select_new_active_agg) {
+						pr_info("%s: Removing an active aggregator\n",
+							slave->dev->master->name);
+						// select new active aggregator
+						ad_agg_selection_logic(__get_first_agg(port));
+					}
+				}
+				break;
+			}
+		}
+	}
+	port->slave = NULL;
+}
+
+/**
+ * bond_3ad_state_machine_handler - handle state machines timeout
+ * @bond: bonding struct to work on
+ *
+ * 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 port *port;
+	struct aggregator *aggregator;
+
+	read_lock(&bond->lock);
+
+	//check if there are any slaves
+	if (bond->slave_cnt == 0)
+		goto re_arm;
+
+	// check if agg_select_timer timer after initialize is timed out
+	if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) {
+		// select the active aggregator for the bond
+		if ((port = __get_first_port(bond))) {
+			if (!port->slave) {
+				pr_warning("%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);
+		}
+		bond_3ad_set_carrier(bond);
+	}
+
+	// for each port run the state machines
+	for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
+		if (!port->slave) {
+			pr_warning("%s: Warning: Found an uninitialized port\n",
+				   bond->dev->name);
+			goto re_arm;
+		}
+
+		/* Lock around state machines to protect data accessed
+		 * by all (e.g., port->sm_vars).  ad_rx_machine may run
+		 * concurrently due to incoming LACPDU.
+		 */
+		__get_state_machine_lock(port);
+
+		ad_rx_machine(NULL, port);
+		ad_periodic_machine(port);
+		ad_port_selection_logic(port);
+		ad_mux_machine(port);
+		ad_tx_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;
+
+		__release_state_machine_lock(port);
+	}
+
+re_arm:
+	queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
+
+	read_unlock(&bond->lock);
+}
+
+/**
+ * bond_3ad_rx_indication - handle a received frame
+ * @lacpdu: received lacpdu
+ * @slave: slave struct to work on
+ * @length: length of the data received
+ *
+ * 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, u16 length)
+{
+	struct port *port;
+	int ret = RX_HANDLER_ANOTHER;
+
+	if (length >= sizeof(struct lacpdu)) {
+
+		port = &(SLAVE_AD_INFO(slave).port);
+
+		if (!port->slave) {
+			pr_warning("%s: Warning: port of slave %s is uninitialized\n",
+				   slave->dev->name, slave->dev->master->name);
+			return ret;
+		}
+
+		switch (lacpdu->subtype) {
+		case AD_TYPE_LACPDU:
+			ret = RX_HANDLER_CONSUMED;
+			pr_debug("Received LACPDU on port %d\n",
+				 port->actor_port_number);
+			/* Protect against concurrent state machines */
+			__get_state_machine_lock(port);
+			ad_rx_machine(lacpdu, port);
+			__release_state_machine_lock(port);
+			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.
+
+			switch (((struct bond_marker *)lacpdu)->tlv_type) {
+			case AD_MARKER_INFORMATION_SUBTYPE:
+				pr_debug("Received Marker Information on port %d\n",
+					 port->actor_port_number);
+				ad_marker_info_received((struct bond_marker *)lacpdu, port);
+				break;
+
+			case AD_MARKER_RESPONSE_SUBTYPE:
+				pr_debug("Received Marker Response on port %d\n",
+					 port->actor_port_number);
+				ad_marker_response_received((struct bond_marker *)lacpdu, port);
+				break;
+
+			default:
+				pr_debug("Received an unknown Marker subtype on slot %d\n",
+					 port->actor_port_number);
+			}
+		}
+	}
+	return ret;
+}
+
+/**
+ * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
+ * @slave: slave struct to work on
+ *
+ * Handle reselection of aggregator (if needed) for this port.
+ */
+void bond_3ad_adapter_speed_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) {
+		pr_warning("Warning: %s: speed changed for uninitialized port on %s\n",
+			   slave->dev->master->name, slave->dev->name);
+		return;
+	}
+
+	port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
+	port->actor_oper_port_key = port->actor_admin_port_key |=
+		(__get_link_speed(port) << 1);
+	pr_debug("Port %d changed speed\n", port->actor_port_number);
+	// there is no need to reselect a new aggregator, just signal the
+	// state machines to reinitialize
+	port->sm_vars |= AD_PORT_BEGIN;
+}
+
+/**
+ * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
+ * @slave: slave struct to work on
+ *
+ * Handle reselection of aggregator (if needed) for this port.
+ */
+void bond_3ad_adapter_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) {
+		pr_warning("%s: Warning: duplex changed for uninitialized port on %s\n",
+			   slave->dev->master->name, slave->dev->name);
+		return;
+	}
+
+	port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
+	port->actor_oper_port_key = port->actor_admin_port_key |=
+		__get_duplex(port);
+	pr_debug("Port %d changed duplex\n", port->actor_port_number);
+	// there is no need to reselect a new aggregator, just signal the
+	// state machines to reinitialize
+	port->sm_vars |= AD_PORT_BEGIN;
+}
+
+/**
+ * bond_3ad_handle_link_change - handle a slave's link status change indication
+ * @slave: slave struct to work on
+ * @status: 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 port *port;
+
+	port = &(SLAVE_AD_INFO(slave).port);
+
+	// if slave is null, the whole port is not initialized
+	if (!port->slave) {
+		pr_warning("Warning: %s: link status changed for uninitialized port on %s\n",
+			   slave->dev->master->name, slave->dev->name);
+		return;
+	}
+
+	// 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;
+		port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
+		port->actor_oper_port_key = port->actor_admin_port_key |=
+			__get_duplex(port);
+		port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
+		port->actor_oper_port_key = port->actor_admin_port_key |=
+			(__get_link_speed(port) << 1);
+	} else {
+		/* link has failed */
+		port->is_enabled = false;
+		port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
+		port->actor_oper_port_key = (port->actor_admin_port_key &=
+					     ~AD_SPEED_KEY_BITS);
+	}
+	//BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
+	// there is no need to reselect a new aggregator, just signal the
+	// state machines to reinitialize
+	port->sm_vars |= AD_PORT_BEGIN;
+}
+
+/*
+ * set link state for bonding master: 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;
+
+	active = __get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator));
+	if (active) {
+		/* are enough slaves available to consider link up? */
+		if (active->num_of_ports < bond->params.min_links) {
+			if (netif_carrier_ok(bond->dev)) {
+				netif_carrier_off(bond->dev);
+				return 1;
+			}
+		} else if (!netif_carrier_ok(bond->dev)) {
+			netif_carrier_on(bond->dev);
+			return 1;
+		}
+		return 0;
+	}
+
+	if (netif_carrier_ok(bond->dev)) {
+		netif_carrier_off(bond->dev);
+		return 1;
+	}
+	return 0;
+}
+
+/**
+ * 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 port *port;
+
+	for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
+		if (port->aggregator && port->aggregator->is_active) {
+			aggregator = port->aggregator;
+			break;
+		}
+	}
+
+	if (aggregator) {
+		ad_info->aggregator_id = aggregator->aggregator_identifier;
+		ad_info->ports = aggregator->num_of_ports;
+		ad_info->actor_key = aggregator->actor_oper_aggregator_key;
+		ad_info->partner_key = aggregator->partner_oper_aggregator_key;
+		memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN);
+		return 0;
+	}
+
+	return -1;
+}
+
+int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
+{
+	struct slave *slave, *start_at;
+	struct bonding *bond = netdev_priv(dev);
+	int slave_agg_no;
+	int slaves_in_agg;
+	int agg_id;
+	int i;
+	struct ad_info ad_info;
+	int res = 1;
+
+	if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
+		pr_debug("%s: Error: bond_3ad_get_active_agg_info failed\n",
+			 dev->name);
+		goto out;
+	}
+
+	slaves_in_agg = ad_info.ports;
+	agg_id = ad_info.aggregator_id;
+
+	if (slaves_in_agg == 0) {
+		/*the aggregator is empty*/
+		pr_debug("%s: Error: active aggregator is empty\n", dev->name);
+		goto out;
+	}
+
+	slave_agg_no = bond->xmit_hash_policy(skb, slaves_in_agg);
+
+	bond_for_each_slave(bond, slave, i) {
+		struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
+
+		if (agg && (agg->aggregator_identifier == agg_id)) {
+			slave_agg_no--;
+			if (slave_agg_no < 0)
+				break;
+		}
+	}
+
+	if (slave_agg_no >= 0) {
+		pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n",
+		       dev->name, agg_id);
+		goto out;
+	}
+
+	start_at = slave;
+
+	bond_for_each_slave_from(bond, slave, i, start_at) {
+		int slave_agg_id = 0;
+		struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
+
+		if (agg)
+			slave_agg_id = agg->aggregator_identifier;
+
+		if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) {
+			res = bond_dev_queue_xmit(bond, skb, slave->dev);
+			break;
+		}
+	}
+
+out:
+	if (res) {
+		/* no suitable interface, frame not sent */
+		dev_kfree_skb(skb);
+	}
+
+	return NETDEV_TX_OK;
+}
+
+int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct bonding *bond,
+			  struct slave *slave)
+{
+	int ret = RX_HANDLER_ANOTHER;
+	if (skb->protocol != PKT_TYPE_LACPDU)
+		return ret;
+
+	if (!pskb_may_pull(skb, sizeof(struct lacpdu)))
+		return ret;
+
+	read_lock(&bond->lock);
+	ret = bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len);
+	read_unlock(&bond->lock);
+	return ret;
+}
+
+/*
+ * When modify lacp_rate parameter via sysfs,
+ * update actor_oper_port_state of each port.
+ *
+ * Hold slave->state_machine_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)
+{
+	int i;
+	struct slave *slave;
+	struct port *port = NULL;
+	int lacp_fast;
+
+	read_lock(&bond->lock);
+	lacp_fast = bond->params.lacp_fast;
+
+	bond_for_each_slave(bond, slave, i) {
+		port = &(SLAVE_AD_INFO(slave).port);
+		__get_state_machine_lock(port);
+		if (lacp_fast)
+			port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
+		else
+			port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
+		__release_state_machine_lock(port);
+	}
+
+	read_unlock(&bond->lock);
+}