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	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
  */
 
 #include <linux/skbuff.h>
 #include <linux/if_ether.h>
 #include <linux/netdevice.h>
 #include <linux/spinlock.h>
 #include <linux/ethtool.h>
 #include <linux/etherdevice.h>
 #include <linux/if_bonding.h>
 #include <linux/pkt_sched.h>
 #include <net/net_namespace.h>
 #include <net/bonding.h>
 #include <net/bond_3ad.h>
 #include <net/netlink.h>
 
 /* General definitions */
 #define AD_SHORT_TIMEOUT           1
 #define AD_LONG_TIMEOUT            0
 #define AD_STANDBY                 0x2
 #define AD_MAX_TX_IN_SECOND        3
 #define AD_COLLECTOR_MAX_DELAY     0
 
 /* Timer definitions (43.4.4 in the 802.3ad standard) */
 #define AD_FAST_PERIODIC_TIME      1
 #define AD_SLOW_PERIODIC_TIME      30
 #define AD_SHORT_TIMEOUT_TIME      (3*AD_FAST_PERIODIC_TIME)
 #define AD_LONG_TIMEOUT_TIME       (3*AD_SLOW_PERIODIC_TIME)
 #define AD_CHURN_DETECTION_TIME    60
 #define AD_AGGREGATE_WAIT_TIME     2
 
 /* Port Variables definitions used by the State Machines (43.4.7 in the
  * 802.3ad standard)
  */
 #define AD_PORT_BEGIN           0x1
 #define AD_PORT_LACP_ENABLED    0x2
 #define AD_PORT_ACTOR_CHURN     0x4
 #define AD_PORT_PARTNER_CHURN   0x8
 #define AD_PORT_READY           0x10
 #define AD_PORT_READY_N         0x20
 #define AD_PORT_MATCHED         0x40
 #define AD_PORT_STANDBY         0x80
 #define AD_PORT_SELECTED        0x100
 #define AD_PORT_MOVED           0x200
 #define AD_PORT_CHURNED         (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN)
 
 /* Port Key definitions
  * key is determined according to the link speed, duplex and
  * user key (which is yet not supported)
  *           --------------------------------------------------------------
  * Port key  | User key (10 bits)           | Speed (5 bits)      | Duplex|
  *           --------------------------------------------------------------
  *           |15                           6|5                   1|0
  */
 #define  AD_DUPLEX_KEY_MASKS    0x1
 #define  AD_SPEED_KEY_MASKS     0x3E
 #define  AD_USER_KEY_MASKS      0xFFC0
 
 enum ad_link_speed_type {
     AD_LINK_SPEED_1MBPS = 1,
     AD_LINK_SPEED_10MBPS,
     AD_LINK_SPEED_100MBPS,
     AD_LINK_SPEED_1000MBPS,
     AD_LINK_SPEED_2500MBPS,
     AD_LINK_SPEED_5000MBPS,
     AD_LINK_SPEED_10000MBPS,
     AD_LINK_SPEED_14000MBPS,
     AD_LINK_SPEED_20000MBPS,
     AD_LINK_SPEED_25000MBPS,
     AD_LINK_SPEED_40000MBPS,
     AD_LINK_SPEED_50000MBPS,
     AD_LINK_SPEED_56000MBPS,
     AD_LINK_SPEED_100000MBPS,
     AD_LINK_SPEED_200000MBPS,
     AD_LINK_SPEED_400000MBPS,
 };
 
 /* compare MAC addresses */
 #define MAC_ADDRESS_EQUAL(A, B) \
     ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
 
 static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = {
     0, 0, 0, 0, 0, 0
 };
 
 static const u16 ad_ticks_per_sec = 1000 / AD_TIMER_INTERVAL;
 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
 
 const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned = {
     0x01, 0x80, 0xC2, 0x00, 0x00, 0x02
 };
 
 /* ================= main 802.3ad protocol functions ================== */
 static int ad_lacpdu_send(struct port *port);
 static int ad_marker_send(struct port *port, struct bond_marker *marker);
 static void ad_mux_machine(struct port *port, bool *update_slave_arr);
 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
 static void ad_tx_machine(struct port *port);
 static void ad_periodic_machine(struct port *port, struct bond_params *bond_params);
 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
 static void ad_agg_selection_logic(struct aggregator *aggregator,
                    bool *update_slave_arr);
 static void ad_clear_agg(struct aggregator *aggregator);
 static void ad_initialize_agg(struct aggregator *aggregator);
 static void ad_initialize_port(struct port *port, int lacp_fast);
 static void ad_enable_collecting_distributing(struct port *port,
                           bool *update_slave_arr);
 static void ad_disable_collecting_distributing(struct port *port,
                            bool *update_slave_arr);
 static void ad_marker_info_received(struct bond_marker *marker_info,
                     struct port *port);
 static void ad_marker_response_received(struct bond_marker *marker,
                     struct port *port);
 static void ad_update_actor_keys(struct port *port, bool reset);
 
 
 /* ================= api to bonding and kernel code ================== */
 
 /**
  * __get_bond_by_port - get the port's bonding struct
  * @port: the port we're looking at
  *
  * Return @port's bonding struct, or %NULL if it can't be found.
  */
 static inline struct bonding *__get_bond_by_port(struct port *port)
 {
     if (port->slave == NULL)
         return NULL;
 
     return bond_get_bond_by_slave(port->slave);
 }
 
 /**
  * __get_first_agg - get the first aggregator in the bond
  * @port: the port we're looking at
  *
  * Return the aggregator of the first slave in @bond, or %NULL if it can't be
  * found.
  * The caller must hold RCU or RTNL lock.
  */
 static inline struct aggregator *__get_first_agg(struct port *port)
 {
     struct bonding *bond = __get_bond_by_port(port);
     struct slave *first_slave;
     struct aggregator *agg;
 
     /* If there's no bond for this port, or bond has no slaves */
     if (bond == NULL)
         return NULL;
 
     rcu_read_lock();
     first_slave = bond_first_slave_rcu(bond);
     agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
     rcu_read_unlock();
 
     return agg;
 }
 
 /**
  * __agg_has_partner - see if we have a partner
  * @agg: the agregator we're looking at
  *
  * Return nonzero if aggregator has a partner (denoted by a non-zero ether
  * address for the partner). Return 0 if not.
  */
 static inline int __agg_has_partner(struct aggregator *agg)
 {
     return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
 }
 
 /**
  * __disable_port - disable the port's slave
  * @port: the port we're looking at
  */
 static inline void __disable_port(struct port *port)
 {
     bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
 }
 
 /**
  * __enable_port - enable the port's slave, if it's up
  * @port: the port we're looking at
  */
 static inline void __enable_port(struct port *port)
 {
     struct slave *slave = port->slave;
 
     if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
         bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
 }
 
 /**
  * __port_is_enabled - check if the port's slave is in active state
  * @port: the port we're looking at
  */
 static inline int __port_is_enabled(struct port *port)
 {
     return bond_is_active_slave(port->slave);
 }
 
 /**
  * __get_agg_selection_mode - get the aggregator selection mode
  * @port: the port we're looking at
  *
  * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
  */
 static inline u32 __get_agg_selection_mode(struct port *port)
 {
     struct bonding *bond = __get_bond_by_port(port);
 
     if (bond == NULL)
         return BOND_AD_STABLE;
 
     return bond->params.ad_select;
 }
 
 /**
  * __check_agg_selection_timer - check if the selection timer has expired
  * @port: the port we're looking at
  */
 static inline int __check_agg_selection_timer(struct port *port)
 {
     struct bonding *bond = __get_bond_by_port(port);
 
     if (bond == NULL)
         return 0;
 
     return atomic_read(&BOND_AD_INFO(bond).agg_select_timer) ? 1 : 0;
 }
 
 /**
  * __get_link_speed - get a port's speed
  * @port: the port we're looking at
  *
  * Return @port's speed in 802.3ad enum format. i.e. one of:
  *     0,
  *     %AD_LINK_SPEED_10MBPS,
  *     %AD_LINK_SPEED_100MBPS,
  *     %AD_LINK_SPEED_1000MBPS,
  *     %AD_LINK_SPEED_2500MBPS,
  *     %AD_LINK_SPEED_5000MBPS,
  *     %AD_LINK_SPEED_10000MBPS
  *     %AD_LINK_SPEED_14000MBPS,
  *     %AD_LINK_SPEED_20000MBPS
  *     %AD_LINK_SPEED_25000MBPS
  *     %AD_LINK_SPEED_40000MBPS
  *     %AD_LINK_SPEED_50000MBPS
  *     %AD_LINK_SPEED_56000MBPS
  *     %AD_LINK_SPEED_100000MBPS
  *     %AD_LINK_SPEED_200000MBPS
  *     %AD_LINK_SPEED_400000MBPS
  */
 static u16 __get_link_speed(struct port *port)
 {
     struct slave *slave = port->slave;
     u16 speed;
 
     /* this if covers only a special case: when the configuration starts
      * with link down, it sets the speed to 0.
      * This is done in spite of the fact that the e100 driver reports 0
      * to be compatible with MVT in the future.
      */
     if (slave->link != BOND_LINK_UP)
         speed = 0;
     else {
         switch (slave->speed) {
         case SPEED_10:
             speed = AD_LINK_SPEED_10MBPS;
             break;
 
         case SPEED_100:
             speed = AD_LINK_SPEED_100MBPS;
             break;
 
         case SPEED_1000:
             speed = AD_LINK_SPEED_1000MBPS;
             break;
 
         case SPEED_2500:
             speed = AD_LINK_SPEED_2500MBPS;
             break;
 
         case SPEED_5000:
             speed = AD_LINK_SPEED_5000MBPS;
             break;
 
         case SPEED_10000:
             speed = AD_LINK_SPEED_10000MBPS;
             break;
 
         case SPEED_14000:
             speed = AD_LINK_SPEED_14000MBPS;
             break;
 
         case SPEED_20000:
             speed = AD_LINK_SPEED_20000MBPS;
             break;
 
         case SPEED_25000:
             speed = AD_LINK_SPEED_25000MBPS;
             break;
 
         case SPEED_40000:
             speed = AD_LINK_SPEED_40000MBPS;
             break;
 
         case SPEED_50000:
             speed = AD_LINK_SPEED_50000MBPS;
             break;
 
         case SPEED_56000:
             speed = AD_LINK_SPEED_56000MBPS;
             break;
 
         case SPEED_100000:
             speed = AD_LINK_SPEED_100000MBPS;
             break;
 
         case SPEED_200000:
             speed = AD_LINK_SPEED_200000MBPS;
             break;
 
         case SPEED_400000:
             speed = AD_LINK_SPEED_400000MBPS;
             break;
 
         default:
             /* unknown speed value from ethtool. shouldn't happen */
             if (slave->speed != SPEED_UNKNOWN)
                 pr_err_once("%s: (slave %s): unknown ethtool speed (%d) for port %d (set it to 0)\n",
                         slave->bond->dev->name,
                         slave->dev->name, slave->speed,
                         port->actor_port_number);
             speed = 0;
             break;
         }
     }
 
     slave_dbg(slave->bond->dev, slave->dev, "Port %d Received link speed %d update from adapter\n",
           port->actor_port_number, speed);
     return speed;
 }
 
 /**
  * __get_duplex - get a port's duplex
  * @port: the port we're looking at
  *
  * Return @port's duplex in 802.3ad bitmask format. i.e.:
  *     0x01 if in full duplex
  *     0x00 otherwise
  */
 static u8 __get_duplex(struct port *port)
 {
     struct slave *slave = port->slave;
     u8 retval = 0x0;
 
     /* handling a special case: when the configuration starts with
      * link down, it sets the duplex to 0.
      */
     if (slave->link == BOND_LINK_UP) {
         switch (slave->duplex) {
         case DUPLEX_FULL:
             retval = 0x1;
             slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status full duplex update from adapter\n",
                   port->actor_port_number);
             break;
         case DUPLEX_HALF:
         default:
             retval = 0x0;
             slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status NOT full duplex update from adapter\n",
                   port->actor_port_number);
             break;
         }
     }
     return retval;
 }
 
 static void __ad_actor_update_port(struct port *port)
 {
     const struct bonding *bond = bond_get_bond_by_slave(port->slave);
 
     port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
     port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority;
 }
 
 /* Conversions */
 
 /**
  * __ad_timer_to_ticks - convert a given timer type to AD module ticks
  * @timer_type: which timer to operate
  * @par: timer parameter. see below
  *
  * If @timer_type is %current_while_timer, @par indicates long/short timer.
  * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
  *                           %SLOW_PERIODIC_TIME.
  */
 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
 {
     u16 retval = 0; /* to silence the compiler */
 
     switch (timer_type) {
     case AD_CURRENT_WHILE_TIMER:    /* for rx machine usage */
         if (par)
             retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
         else
             retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
         break;
     case AD_ACTOR_CHURN_TIMER:  /* for local churn machine */
         retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
         break;
     case AD_PERIODIC_TIMER:     /* for periodic machine */
         retval = (par*ad_ticks_per_sec); /* long timeout */
         break;
     case AD_PARTNER_CHURN_TIMER:    /* for remote churn machine */
         retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
         break;
     case AD_WAIT_WHILE_TIMER:   /* for selection machine */
         retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
         break;
     }
 
     return retval;
 }
 
 
 /* ================= ad_rx_machine helper functions ================== */
 
 /**
  * __choose_matched - update a port's matched variable from a received lacpdu
  * @lacpdu: the lacpdu we've received
  * @port: the port we're looking at
  *
  * Update the value of the matched variable, using parameter values from a
  * newly received lacpdu. Parameter values for the partner carried in the
  * received PDU are compared with the corresponding operational parameter
  * values for the actor. Matched is set to TRUE if all of these parameters
  * match and the PDU parameter partner_state.aggregation has the same value as
  * actor_oper_port_state.aggregation and lacp will actively maintain the link
  * in the aggregation. Matched is also set to TRUE if the value of
  * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
  * an individual link and lacp will actively maintain the link. Otherwise,
  * matched is set to FALSE. LACP is considered to be actively maintaining the
  * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
  * the actor's actor_oper_port_state.lacp_activity and the PDU's
  * partner_state.lacp_activity variables are TRUE.
  *
  * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
  * used here to implement the language from 802.3ad 43.4.9 that requires
  * recordPDU to "match" the LACPDU parameters to the stored values.
  */
 static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
 {
     /* check if all parameters are alike
      * or this is individual link(aggregation == FALSE)
      * then update the state machine Matched variable.
      */
     if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
          (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
          MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
          (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
          (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
          ((lacpdu->partner_state & LACP_STATE_AGGREGATION) == (port->actor_oper_port_state & LACP_STATE_AGGREGATION))) ||
         ((lacpdu->actor_state & LACP_STATE_AGGREGATION) == 0)
         ) {
         port->sm_vars |= AD_PORT_MATCHED;
     } else {
         port->sm_vars &= ~AD_PORT_MATCHED;
     }
 }
 
 /**
  * __record_pdu - record parameters from a received lacpdu
  * @lacpdu: the lacpdu we've received
  * @port: the port we're looking at
  *
  * Record the parameter values for the Actor carried in a received lacpdu as
  * the current partner operational parameter values and sets
  * actor_oper_port_state.defaulted to FALSE.
  */
 static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
 {
     if (lacpdu && port) {
         struct port_params *partner = &port->partner_oper;
 
         __choose_matched(lacpdu, port);
         /* record the new parameter values for the partner
          * operational
          */
         partner->port_number = ntohs(lacpdu->actor_port);
         partner->port_priority = ntohs(lacpdu->actor_port_priority);
         partner->system = lacpdu->actor_system;
         partner->system_priority = ntohs(lacpdu->actor_system_priority);
         partner->key = ntohs(lacpdu->actor_key);
         partner->port_state = lacpdu->actor_state;
 
         /* set actor_oper_port_state.defaulted to FALSE */
         port->actor_oper_port_state &= ~LACP_STATE_DEFAULTED;
 
         /* set the partner sync. to on if the partner is sync,
          * and the port is matched
          */
         if ((port->sm_vars & AD_PORT_MATCHED) &&
             (lacpdu->actor_state & LACP_STATE_SYNCHRONIZATION)) {
             partner->port_state |= LACP_STATE_SYNCHRONIZATION;
             slave_dbg(port->slave->bond->dev, port->slave->dev,
                   "partner sync=1\n");
         } else {
             partner->port_state &= ~LACP_STATE_SYNCHRONIZATION;
             slave_dbg(port->slave->bond->dev, port->slave->dev,
                   "partner sync=0\n");
         }
     }
 }
 
 /**
  * __record_default - record default parameters
  * @port: the port we're looking at
  *
  * This function records the default parameter values for the partner carried
  * in the Partner Admin parameters as the current partner operational parameter
  * values and sets actor_oper_port_state.defaulted to TRUE.
  */
 static void __record_default(struct port *port)
 {
     if (port) {
         /* record the partner admin parameters */
         memcpy(&port->partner_oper, &port->partner_admin,
                sizeof(struct port_params));
 
         /* set actor_oper_port_state.defaulted to true */
         port->actor_oper_port_state |= LACP_STATE_DEFAULTED;
     }
 }
 
 /**
  * __update_selected - update a port's Selected variable from a received lacpdu
  * @lacpdu: the lacpdu we've received
  * @port: the port we're looking at
  *
  * Update the value of the selected variable, using parameter values from a
  * newly received lacpdu. The parameter values for the Actor carried in the
  * received PDU are compared with the corresponding operational parameter
  * values for the ports partner. If one or more of the comparisons shows that
  * the value(s) received in the PDU differ from the current operational values,
  * then selected is set to FALSE and actor_oper_port_state.synchronization is
  * set to out_of_sync. Otherwise, selected remains unchanged.
  */
 static void __update_selected(struct lacpdu *lacpdu, struct port *port)
 {
     if (lacpdu && port) {
         const struct port_params *partner = &port->partner_oper;
 
         /* check if any parameter is different then
          * update the state machine selected variable.
          */
         if (ntohs(lacpdu->actor_port) != partner->port_number ||
             ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
             !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
             ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
             ntohs(lacpdu->actor_key) != partner->key ||
             (lacpdu->actor_state & LACP_STATE_AGGREGATION) != (partner->port_state & LACP_STATE_AGGREGATION)) {
             port->sm_vars &= ~AD_PORT_SELECTED;
         }
     }
 }
 
 /**
  * __update_default_selected - update a port's Selected variable from Partner
  * @port: the port we're looking at
  *
  * This function updates the value of the selected variable, using the partner
  * administrative parameter values. The administrative values are compared with
  * the corresponding operational parameter values for the partner. If one or
  * more of the comparisons shows that the administrative value(s) differ from
  * the current operational values, then Selected is set to FALSE and
  * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
  * Selected remains unchanged.
  */
 static void __update_default_selected(struct port *port)
 {
     if (port) {
         const struct port_params *admin = &port->partner_admin;
         const struct port_params *oper = &port->partner_oper;
 
         /* check if any parameter is different then
          * update the state machine selected variable.
          */
         if (admin->port_number != oper->port_number ||
             admin->port_priority != oper->port_priority ||
             !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
             admin->system_priority != oper->system_priority ||
             admin->key != oper->key ||
             (admin->port_state & LACP_STATE_AGGREGATION)
             != (oper->port_state & LACP_STATE_AGGREGATION)) {
             port->sm_vars &= ~AD_PORT_SELECTED;
         }
     }
 }
 
 /**
  * __update_ntt - update a port's ntt variable from a received lacpdu
  * @lacpdu: the lacpdu we've received
  * @port: the port we're looking at
  *
  * Updates the value of the ntt variable, using parameter values from a newly
  * received lacpdu. The parameter values for the partner carried in the
  * received PDU are compared with the corresponding operational parameter
  * values for the Actor. If one or more of the comparisons shows that the
  * value(s) received in the PDU differ from the current operational values,
  * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
  */
 static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
 {
     /* validate lacpdu and port */
     if (lacpdu && port) {
         /* check if any parameter is different then
          * update the port->ntt.
          */
         if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
             (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
             !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
             (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
             (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
             ((lacpdu->partner_state & LACP_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY)) ||
             ((lacpdu->partner_state & LACP_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)) ||
             ((lacpdu->partner_state & LACP_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) ||
             ((lacpdu->partner_state & LACP_STATE_AGGREGATION) != (port->actor_oper_port_state & LACP_STATE_AGGREGATION))
            ) {
             port->ntt = true;
         }
     }
 }
 
 /**
  * __agg_ports_are_ready - check if all ports in an aggregator are ready
  * @aggregator: the aggregator we're looking at
  *
  */
 static int __agg_ports_are_ready(struct aggregator *aggregator)
 {
     struct port *port;
     int retval = 1;
 
     if (aggregator) {
         /* scan all ports in this aggregator to verfy if they are
          * all ready.
          */
         for (port = aggregator->lag_ports;
              port;
              port = port->next_port_in_aggregator) {
             if (!(port->sm_vars & AD_PORT_READY_N)) {
                 retval = 0;
                 break;
             }
         }
     }
 
     return retval;
 }
 
 /**
  * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
  * @aggregator: the aggregator we're looking at
  * @val: Should the ports' ready bit be set on or off
  *
  */
 static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
 {
     struct port *port;
 
     for (port = aggregator->lag_ports; port;
          port = port->next_port_in_aggregator) {
         if (val)
             port->sm_vars |= AD_PORT_READY;
         else
             port->sm_vars &= ~AD_PORT_READY;
     }
 }
 
 static int __agg_active_ports(struct aggregator *agg)
 {
     struct port *port;
     int active = 0;
 
     for (port = agg->lag_ports; port;
          port = port->next_port_in_aggregator) {
         if (port->is_enabled)
             active++;
     }
 
     return active;
 }
 
 /**
  * __get_agg_bandwidth - get the total bandwidth of an aggregator
  * @aggregator: the aggregator we're looking at
  *
  */
 static u32 __get_agg_bandwidth(struct aggregator *aggregator)
 {
     int nports = __agg_active_ports(aggregator);
     u32 bandwidth = 0;
 
     if (nports) {
         switch (__get_link_speed(aggregator->lag_ports)) {
         case AD_LINK_SPEED_1MBPS:
             bandwidth = nports;
             break;
         case AD_LINK_SPEED_10MBPS:
             bandwidth = nports * 10;
             break;
         case AD_LINK_SPEED_100MBPS:
             bandwidth = nports * 100;
             break;
         case AD_LINK_SPEED_1000MBPS:
             bandwidth = nports * 1000;
             break;
         case AD_LINK_SPEED_2500MBPS:
             bandwidth = nports * 2500;
             break;
         case AD_LINK_SPEED_5000MBPS:
             bandwidth = nports * 5000;
             break;
         case AD_LINK_SPEED_10000MBPS:
             bandwidth = nports * 10000;
             break;
         case AD_LINK_SPEED_14000MBPS:
             bandwidth = nports * 14000;
             break;
         case AD_LINK_SPEED_20000MBPS:
             bandwidth = nports * 20000;
             break;
         case AD_LINK_SPEED_25000MBPS:
             bandwidth = nports * 25000;
             break;
         case AD_LINK_SPEED_40000MBPS:
             bandwidth = nports * 40000;
             break;
         case AD_LINK_SPEED_50000MBPS:
             bandwidth = nports * 50000;
             break;
         case AD_LINK_SPEED_56000MBPS:
             bandwidth = nports * 56000;
             break;
         case AD_LINK_SPEED_100000MBPS:
             bandwidth = nports * 100000;
             break;
         case AD_LINK_SPEED_200000MBPS:
             bandwidth = nports * 200000;
             break;
         case AD_LINK_SPEED_400000MBPS:
             bandwidth = nports * 400000;
             break;
         default:
             bandwidth = 0; /* to silence the compiler */
         }
     }
     return bandwidth;
 }
 
 /**
  * __get_active_agg - get the current active aggregator
  * @aggregator: the aggregator we're looking at
  *
  * Caller must hold RCU lock.
  */
 static struct aggregator *__get_active_agg(struct aggregator *aggregator)
 {
     struct bonding *bond = aggregator->slave->bond;
     struct list_head *iter;
     struct slave *slave;
 
     bond_for_each_slave_rcu(bond, slave, iter)
         if (SLAVE_AD_INFO(slave)->aggregator.is_active)
             return &(SLAVE_AD_INFO(slave)->aggregator);
 
     return NULL;
 }
 
 /**
  * __update_lacpdu_from_port - update a port's lacpdu fields
  * @port: the port we're looking at
  */
 static inline void __update_lacpdu_from_port(struct port *port)
 {
     struct lacpdu *lacpdu = &port->lacpdu;
     const struct port_params *partner = &port->partner_oper;
 
     /* update current actual Actor parameters
      * lacpdu->subtype                   initialized
      * lacpdu->version_number            initialized
      * lacpdu->tlv_type_actor_info       initialized
      * lacpdu->actor_information_length  initialized
      */
 
     lacpdu->actor_system_priority = htons(port->actor_system_priority);
     lacpdu->actor_system = port->actor_system;
     lacpdu->actor_key = htons(port->actor_oper_port_key);
     lacpdu->actor_port_priority = htons(port->actor_port_priority);
     lacpdu->actor_port = htons(port->actor_port_number);
     lacpdu->actor_state = port->actor_oper_port_state;
     slave_dbg(port->slave->bond->dev, port->slave->dev,
           "update lacpdu: actor port state %x\n",
           port->actor_oper_port_state);
 
     /* lacpdu->reserved_3_1              initialized
      * lacpdu->tlv_type_partner_info     initialized
      * lacpdu->partner_information_length initialized
      */
 
     lacpdu->partner_system_priority = htons(partner->system_priority);
     lacpdu->partner_system = partner->system;
     lacpdu->partner_key = htons(partner->key);
     lacpdu->partner_port_priority = htons(partner->port_priority);
     lacpdu->partner_port = htons(partner->port_number);
     lacpdu->partner_state = partner->port_state;
 
     /* lacpdu->reserved_3_2              initialized
      * lacpdu->tlv_type_collector_info   initialized
      * lacpdu->collector_information_length initialized
      * collector_max_delay                initialized
      * reserved_12[12]                   initialized
      * tlv_type_terminator               initialized
      * terminator_length                 initialized
      * reserved_50[50]                   initialized
      */
 }
 
 /* ================= main 802.3ad protocol code ========================= */
 
 /**
  * ad_lacpdu_send - send out a lacpdu packet on a given port
  * @port: the port we're looking at
  *
  * Returns:   0 on success
  *          < 0 on error
  */
 static int ad_lacpdu_send(struct port *port)
 {
     struct slave *slave = port->slave;
     struct sk_buff *skb;
     struct lacpdu_header *lacpdu_header;
     int length = sizeof(struct lacpdu_header);
 
     skb = dev_alloc_skb(length);
     if (!skb)
         return -ENOMEM;
 
     atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_tx);
     atomic64_inc(&BOND_AD_INFO(slave->bond).stats.lacpdu_tx);
 
     skb->dev = slave->dev;
     skb_reset_mac_header(skb);
     skb->network_header = skb->mac_header + ETH_HLEN;
     skb->protocol = PKT_TYPE_LACPDU;
     skb->priority = TC_PRIO_CONTROL;
 
     lacpdu_header = skb_put(skb, length);
 
     ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
     /* Note: source address is set to be the member's PERMANENT address,
      * because we use it to identify loopback lacpdus in receive.
      */
     ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
     lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
 
     lacpdu_header->lacpdu = port->lacpdu;
 
     dev_queue_xmit(skb);
 
     return 0;
 }
 
 /**
  * ad_marker_send - send marker information/response on a given port
  * @port: the port we're looking at
  * @marker: marker data to send
  *
  * Returns:   0 on success
  *          < 0 on error
  */
 static int ad_marker_send(struct port *port, struct bond_marker *marker)
 {
     struct slave *slave = port->slave;
     struct sk_buff *skb;
     struct bond_marker_header *marker_header;
     int length = sizeof(struct bond_marker_header);
 
     skb = dev_alloc_skb(length + 16);
     if (!skb)
         return -ENOMEM;
 
     switch (marker->tlv_type) {
     case AD_MARKER_INFORMATION_SUBTYPE:
         atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_tx);
         atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_tx);
         break;
     case AD_MARKER_RESPONSE_SUBTYPE:
         atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_resp_tx);
         atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_resp_tx);
         break;
     }
 
     skb_reserve(skb, 16);
 
     skb->dev = slave->dev;
     skb_reset_mac_header(skb);
     skb->network_header = skb->mac_header + ETH_HLEN;
     skb->protocol = PKT_TYPE_LACPDU;
 
     marker_header = skb_put(skb, length);
 
     ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
     /* Note: source address is set to be the member's PERMANENT address,
      * because we use it to identify loopback MARKERs in receive.
      */
     ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
     marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
 
     marker_header->marker = *marker;
 
     dev_queue_xmit(skb);
 
     return 0;
 }
 
 /**
  * ad_mux_machine - handle a port's mux state machine
  * @port: the port we're looking at
  * @update_slave_arr: Does slave array need update?
  */
 static void ad_mux_machine(struct port *port, bool *update_slave_arr)
 {
     mux_states_t last_state;
 
     /* keep current State Machine state to compare later if it was
      * changed
      */
     last_state = port->sm_mux_state;
 
     if (port->sm_vars & AD_PORT_BEGIN) {
         port->sm_mux_state = AD_MUX_DETACHED;
     } else {
         switch (port->sm_mux_state) {
         case AD_MUX_DETACHED:
             if ((port->sm_vars & AD_PORT_SELECTED)
                 || (port->sm_vars & AD_PORT_STANDBY))
                 /* if SELECTED or STANDBY */
                 port->sm_mux_state = AD_MUX_WAITING;
             break;
         case AD_MUX_WAITING:
             /* if SELECTED == FALSE return to DETACH state */
             if (!(port->sm_vars & AD_PORT_SELECTED)) {
                 port->sm_vars &= ~AD_PORT_READY_N;
                 /* in order to withhold the Selection Logic to
                  * check all ports READY_N value every callback
                  * cycle to update ready variable, we check
                  * READY_N and update READY here
                  */
                 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
                 port->sm_mux_state = AD_MUX_DETACHED;
                 break;
             }
 
             /* check if the wait_while_timer expired */
             if (port->sm_mux_timer_counter
                 && !(--port->sm_mux_timer_counter))
                 port->sm_vars |= AD_PORT_READY_N;
 
             /* in order to withhold the selection logic to check
              * all ports READY_N value every callback cycle to
              * update ready variable, we check READY_N and update
              * READY here
              */
             __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
 
             /* if the wait_while_timer expired, and the port is
              * in READY state, move to ATTACHED state
              */
             if ((port->sm_vars & AD_PORT_READY)
                 && !port->sm_mux_timer_counter)
                 port->sm_mux_state = AD_MUX_ATTACHED;
             break;
         case AD_MUX_ATTACHED:
             /* check also if agg_select_timer expired (so the
              * edable port will take place only after this timer)
              */
             if ((port->sm_vars & AD_PORT_SELECTED) &&
                 (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) &&
                 !__check_agg_selection_timer(port)) {
                 if (port->aggregator->is_active)
                     port->sm_mux_state =
                         AD_MUX_COLLECTING_DISTRIBUTING;
             } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
                    (port->sm_vars & AD_PORT_STANDBY)) {
                 /* if UNSELECTED or STANDBY */
                 port->sm_vars &= ~AD_PORT_READY_N;
                 /* in order to withhold the selection logic to
                  * check all ports READY_N value every callback
                  * cycle to update ready variable, we check
                  * READY_N and update READY here
                  */
                 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
                 port->sm_mux_state = AD_MUX_DETACHED;
             } else if (port->aggregator->is_active) {
                 port->actor_oper_port_state |=
                     LACP_STATE_SYNCHRONIZATION;
             }
             break;
         case AD_MUX_COLLECTING_DISTRIBUTING:
             if (!(port->sm_vars & AD_PORT_SELECTED) ||
                 (port->sm_vars & AD_PORT_STANDBY) ||
                 !(port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) ||
                 !(port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) {
                 port->sm_mux_state = AD_MUX_ATTACHED;
             } else {
                 /* if port state hasn't changed make
                  * sure that a collecting distributing
                  * port in an active aggregator is enabled
                  */
                 if (port->aggregator &&
                     port->aggregator->is_active &&
                     !__port_is_enabled(port)) {
                     __enable_port(port);
                     *update_slave_arr = true;
                 }
             }
             break;
         default:
             break;
         }
     }
 
     /* check if the state machine was changed */
     if (port->sm_mux_state != last_state) {
         slave_dbg(port->slave->bond->dev, port->slave->dev,
               "Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",
               port->actor_port_number,
               last_state,
               port->sm_mux_state);
         switch (port->sm_mux_state) {
         case AD_MUX_DETACHED:
             port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;
             ad_disable_collecting_distributing(port,
                                update_slave_arr);
             port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;
             port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;
             port->ntt = true;
             break;
         case AD_MUX_WAITING:
             port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
             break;
         case AD_MUX_ATTACHED:
             if (port->aggregator->is_active)
                 port->actor_oper_port_state |=
                     LACP_STATE_SYNCHRONIZATION;
             else
                 port->actor_oper_port_state &=
                     ~LACP_STATE_SYNCHRONIZATION;
             port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;
             port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;
             ad_disable_collecting_distributing(port,
                                update_slave_arr);
             port->ntt = true;
             break;
         case AD_MUX_COLLECTING_DISTRIBUTING:
             port->actor_oper_port_state |= LACP_STATE_COLLECTING;
             port->actor_oper_port_state |= LACP_STATE_DISTRIBUTING;
             port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION;
             ad_enable_collecting_distributing(port,
                               update_slave_arr);
             port->ntt = true;
             break;
         default:
             break;
         }
     }
 }
 
 /**
  * ad_rx_machine - handle a port's rx State Machine
  * @lacpdu: the lacpdu we've received
  * @port: the port we're looking at
  *
  * If lacpdu arrived, stop previous timer (if exists) and set the next state as
  * CURRENT. If timer expired set the state machine in the proper state.
  * In other cases, this function checks if we need to switch to other state.
  */
 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
 {
     rx_states_t last_state;
 
     /* keep current State Machine state to compare later if it was
      * changed
      */
     last_state = port->sm_rx_state;
 
     if (lacpdu) {
         atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.lacpdu_rx);
         atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.lacpdu_rx);
     }
     /* check if state machine should change state */
 
     /* first, check if port was reinitialized */
     if (port->sm_vars & AD_PORT_BEGIN) {
         port->sm_rx_state = AD_RX_INITIALIZE;
         port->sm_vars |= AD_PORT_CHURNED;
     /* check if port is not enabled */
     } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled)
         port->sm_rx_state = AD_RX_PORT_DISABLED;
     /* check if new lacpdu arrived */
     else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
          (port->sm_rx_state == AD_RX_DEFAULTED) ||
          (port->sm_rx_state == AD_RX_CURRENT))) {
         if (port->sm_rx_state != AD_RX_CURRENT)
             port->sm_vars |= AD_PORT_CHURNED;
         port->sm_rx_timer_counter = 0;
         port->sm_rx_state = AD_RX_CURRENT;
     } else {
         /* if timer is on, and if it is expired */
         if (port->sm_rx_timer_counter &&
             !(--port->sm_rx_timer_counter)) {
             switch (port->sm_rx_state) {
             case AD_RX_EXPIRED:
                 port->sm_rx_state = AD_RX_DEFAULTED;
                 break;
             case AD_RX_CURRENT:
                 port->sm_rx_state = AD_RX_EXPIRED;
                 break;
             default:
                 break;
             }
         } else {
             /* if no lacpdu arrived and no timer is on */
             switch (port->sm_rx_state) {
             case AD_RX_PORT_DISABLED:
                 if (port->is_enabled &&
                     (port->sm_vars & AD_PORT_LACP_ENABLED))
                     port->sm_rx_state = AD_RX_EXPIRED;
                 else if (port->is_enabled
                      && ((port->sm_vars
                           & AD_PORT_LACP_ENABLED) == 0))
                     port->sm_rx_state = AD_RX_LACP_DISABLED;
                 break;
             default:
                 break;
 
             }
         }
     }
 
     /* check if the State machine was changed or new lacpdu arrived */
     if ((port->sm_rx_state != last_state) || (lacpdu)) {
         slave_dbg(port->slave->bond->dev, port->slave->dev,
               "Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",
               port->actor_port_number,
               last_state,
               port->sm_rx_state);
         switch (port->sm_rx_state) {
         case AD_RX_INITIALIZE:
             if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
                 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
             else
                 port->sm_vars |= AD_PORT_LACP_ENABLED;
             port->sm_vars &= ~AD_PORT_SELECTED;
             __record_default(port);
             port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
             port->sm_rx_state = AD_RX_PORT_DISABLED;
 
             fallthrough;
         case AD_RX_PORT_DISABLED:
             port->sm_vars &= ~AD_PORT_MATCHED;
             break;
         case AD_RX_LACP_DISABLED:
             port->sm_vars &= ~AD_PORT_SELECTED;
             __record_default(port);
             port->partner_oper.port_state &= ~LACP_STATE_AGGREGATION;
             port->sm_vars |= AD_PORT_MATCHED;
             port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
             break;
         case AD_RX_EXPIRED:
             /* Reset of the Synchronization flag (Standard 43.4.12)
              * This reset cause to disable this port in the
              * COLLECTING_DISTRIBUTING state of the mux machine in
              * case of EXPIRED even if LINK_DOWN didn't arrive for
              * the port.
              */
             port->partner_oper.port_state &= ~LACP_STATE_SYNCHRONIZATION;
             port->sm_vars &= ~AD_PORT_MATCHED;
             port->partner_oper.port_state |= LACP_STATE_LACP_TIMEOUT;
             port->partner_oper.port_state |= LACP_STATE_LACP_ACTIVITY;
             port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
             port->actor_oper_port_state |= LACP_STATE_EXPIRED;
             port->sm_vars |= AD_PORT_CHURNED;
             break;
         case AD_RX_DEFAULTED:
             __update_default_selected(port);
             __record_default(port);
             port->sm_vars |= AD_PORT_MATCHED;
             port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
             break;
         case AD_RX_CURRENT:
             /* detect loopback situation */
             if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
                           &(port->actor_system))) {
                 slave_err(port->slave->bond->dev, port->slave->dev, "An illegal loopback occurred on slave\n"
                       "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n");
                 return;
             }
             __update_selected(lacpdu, port);
             __update_ntt(lacpdu, port);
             __record_pdu(lacpdu, port);
             port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT));
             port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
             break;
         default:
             break;
         }
     }
 }
 
 /**
  * ad_churn_machine - handle port churn's state machine
  * @port: the port we're looking at
  *
  */
 static void ad_churn_machine(struct port *port)
 {
     if (port->sm_vars & AD_PORT_CHURNED) {
         port->sm_vars &= ~AD_PORT_CHURNED;
         port->sm_churn_actor_state = AD_CHURN_MONITOR;
         port->sm_churn_partner_state = AD_CHURN_MONITOR;
         port->sm_churn_actor_timer_counter =
             __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0);
         port->sm_churn_partner_timer_counter =
              __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0);
         return;
     }
     if (port->sm_churn_actor_timer_counter &&
         !(--port->sm_churn_actor_timer_counter) &&
         port->sm_churn_actor_state == AD_CHURN_MONITOR) {
         if (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION) {
             port->sm_churn_actor_state = AD_NO_CHURN;
         } else {
             port->churn_actor_count++;
             port->sm_churn_actor_state = AD_CHURN;
         }
     }
     if (port->sm_churn_partner_timer_counter &&
         !(--port->sm_churn_partner_timer_counter) &&
         port->sm_churn_partner_state == AD_CHURN_MONITOR) {
         if (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) {
             port->sm_churn_partner_state = AD_NO_CHURN;
         } else {
             port->churn_partner_count++;
             port->sm_churn_partner_state = AD_CHURN;
         }
     }
 }
 
 /**
  * ad_tx_machine - handle a port's tx state machine
  * @port: the port we're looking at
  */
 static void ad_tx_machine(struct port *port)
 {
     /* check if tx timer expired, to verify that we do not send more than
      * 3 packets per second
      */
     if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
         /* check if there is something to send */
         if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
             __update_lacpdu_from_port(port);
 
             if (ad_lacpdu_send(port) >= 0) {
                 slave_dbg(port->slave->bond->dev,
                       port->slave->dev,
                       "Sent LACPDU on port %d\n",
                       port->actor_port_number);
 
                 /* mark ntt as false, so it will not be sent
                  * again until demanded
                  */
                 port->ntt = false;
             }
         }
         /* restart tx timer(to verify that we will not exceed
          * AD_MAX_TX_IN_SECOND
          */
         port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
     }
 }
 
 /**
  * ad_periodic_machine - handle a port's periodic state machine
  * @port: the port we're looking at
  * @bond_params: bond parameters we will use
  *
  * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
  */
 static void ad_periodic_machine(struct port *port, struct bond_params *bond_params)
 {
     periodic_states_t last_state;
 
     /* keep current state machine state to compare later if it was changed */
     last_state = port->sm_periodic_state;
 
     /* check if port was reinitialized */
     if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
         (!(port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & LACP_STATE_LACP_ACTIVITY)) ||
         !bond_params->lacp_active) {
         port->sm_periodic_state = AD_NO_PERIODIC;
     }
     /* check if state machine should change state */
     else if (port->sm_periodic_timer_counter) {
         /* check if periodic state machine expired */
         if (!(--port->sm_periodic_timer_counter)) {
             /* if expired then do tx */
             port->sm_periodic_state = AD_PERIODIC_TX;
         } else {
             /* If not expired, check if there is some new timeout
              * parameter from the partner state
              */
             switch (port->sm_periodic_state) {
             case AD_FAST_PERIODIC:
                 if (!(port->partner_oper.port_state
                       & LACP_STATE_LACP_TIMEOUT))
                     port->sm_periodic_state = AD_SLOW_PERIODIC;
                 break;
             case AD_SLOW_PERIODIC:
                 if ((port->partner_oper.port_state & LACP_STATE_LACP_TIMEOUT)) {
                     port->sm_periodic_timer_counter = 0;
                     port->sm_periodic_state = AD_PERIODIC_TX;
                 }
                 break;
             default:
                 break;
             }
         }
     } else {
         switch (port->sm_periodic_state) {
         case AD_NO_PERIODIC:
             port->sm_periodic_state = AD_FAST_PERIODIC;
             break;
         case AD_PERIODIC_TX:
             if (!(port->partner_oper.port_state &
                 LACP_STATE_LACP_TIMEOUT))
                 port->sm_periodic_state = AD_SLOW_PERIODIC;
             else
                 port->sm_periodic_state = AD_FAST_PERIODIC;
             break;
         default:
             break;
         }
     }
 
     /* check if the state machine was changed */
     if (port->sm_periodic_state != last_state) {
         slave_dbg(port->slave->bond->dev, port->slave->dev,
               "Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
               port->actor_port_number, last_state,
               port->sm_periodic_state);
         switch (port->sm_periodic_state) {
         case AD_NO_PERIODIC:
             port->sm_periodic_timer_counter = 0;
             break;
         case AD_FAST_PERIODIC:
             /* decrement 1 tick we lost in the PERIODIC_TX cycle */
             port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
             break;
         case AD_SLOW_PERIODIC:
             /* decrement 1 tick we lost in the PERIODIC_TX cycle */
             port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
             break;
         case AD_PERIODIC_TX:
             port->ntt = true;
             break;
         default:
             break;
         }
     }
 }
 
 /**
  * ad_port_selection_logic - select aggregation groups
  * @port: the port we're looking at
  * @update_slave_arr: Does slave array need update?
  *
  * Select aggregation groups, and assign each port for it's aggregetor. The
  * selection logic is called in the inititalization (after all the handshkes),
  * and after every lacpdu receive (if selected is off).
  */
 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
 {
     struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
     struct port *last_port = NULL, *curr_port;
     struct list_head *iter;
     struct bonding *bond;
     struct slave *slave;
     int found = 0;
 
     /* if the port is already Selected, do nothing */
     if (port->sm_vars & AD_PORT_SELECTED)
         return;
 
     bond = __get_bond_by_port(port);
 
     /* if the port is connected to other aggregator, detach it */
     if (port->aggregator) {
         /* detach the port from its former aggregator */
         temp_aggregator = port->aggregator;
         for (curr_port = temp_aggregator->lag_ports; curr_port;
              last_port = curr_port,
              curr_port = curr_port->next_port_in_aggregator) {
             if (curr_port == port) {
                 temp_aggregator->num_of_ports--;
                 /* if it is the first port attached to the
                  * aggregator
                  */
                 if (!last_port) {
                     temp_aggregator->lag_ports =
                         port->next_port_in_aggregator;
                 } else {
                     /* not the first port attached to the
                      * aggregator
                      */
                     last_port->next_port_in_aggregator =
                         port->next_port_in_aggregator;
                 }
 
                 /* clear the port's relations to this
                  * aggregator
                  */
                 port->aggregator = NULL;
                 port->next_port_in_aggregator = NULL;
                 port->actor_port_aggregator_identifier = 0;
 
                 slave_dbg(bond->dev, port->slave->dev, "Port %d left LAG %d\n",
                       port->actor_port_number,
                       temp_aggregator->aggregator_identifier);
                 /* if the aggregator is empty, clear its
                  * parameters, and set it ready to be attached
                  */
                 if (!temp_aggregator->lag_ports)
                     ad_clear_agg(temp_aggregator);
                 break;
             }
         }
         if (!curr_port) {
             /* meaning: the port was related to an aggregator
              * but was not on the aggregator port list
              */
             net_warn_ratelimited("%s: (slave %s): Warning: Port %d was related to aggregator %d but was not on its port list\n",
                          port->slave->bond->dev->name,
                          port->slave->dev->name,
                          port->actor_port_number,
                          port->aggregator->aggregator_identifier);
         }
     }
     /* search on all aggregators for a suitable aggregator for this port */
     bond_for_each_slave(bond, slave, iter) {
         aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
 
         /* keep a free aggregator for later use(if needed) */
         if (!aggregator->lag_ports) {
             if (!free_aggregator)
                 free_aggregator = aggregator;
             continue;
         }
         /* check if current aggregator suits us */
         if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
              MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
              (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
              (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
             ) &&
             ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
               !aggregator->is_individual)  /* but is not individual OR */
             )
            ) {
             /* attach to the founded aggregator */
             port->aggregator = aggregator;
             port->actor_port_aggregator_identifier =
                 port->aggregator->aggregator_identifier;
             port->next_port_in_aggregator = aggregator->lag_ports;
             port->aggregator->num_of_ports++;
             aggregator->lag_ports = port;
             slave_dbg(bond->dev, slave->dev, "Port %d joined LAG %d (existing LAG)\n",
                   port->actor_port_number,
                   port->aggregator->aggregator_identifier);
 
             /* mark this port as selected */
             port->sm_vars |= AD_PORT_SELECTED;
             found = 1;
             break;
         }
     }
 
     /* the port couldn't find an aggregator - attach it to a new
      * aggregator
      */
     if (!found) {
         if (free_aggregator) {
             /* assign port a new aggregator */
             port->aggregator = free_aggregator;
             port->actor_port_aggregator_identifier =
                 port->aggregator->aggregator_identifier;
 
             /* update the new aggregator's parameters
              * if port was responsed from the end-user
              */
             if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
                 /* if port is full duplex */
                 port->aggregator->is_individual = false;
             else
                 port->aggregator->is_individual = true;
 
             port->aggregator->actor_admin_aggregator_key =
                 port->actor_admin_port_key;
             port->aggregator->actor_oper_aggregator_key =
                 port->actor_oper_port_key;
             port->aggregator->partner_system =
                 port->partner_oper.system;
             port->aggregator->partner_system_priority =
                 port->partner_oper.system_priority;
             port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
             port->aggregator->receive_state = 1;
             port->aggregator->transmit_state = 1;
             port->aggregator->lag_ports = port;
             port->aggregator->num_of_ports++;
 
             /* mark this port as selected */
             port->sm_vars |= AD_PORT_SELECTED;
 
             slave_dbg(bond->dev, port->slave->dev, "Port %d joined LAG %d (new LAG)\n",
                   port->actor_port_number,
                   port->aggregator->aggregator_identifier);
         } else {
             slave_err(bond->dev, port->slave->dev,
                   "Port %d did not find a suitable aggregator\n",
                   port->actor_port_number);
         }
     }
     /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
      * in all aggregator's ports, else set ready=FALSE in all
      * aggregator's ports
      */
     __set_agg_ports_ready(port->aggregator,
                   __agg_ports_are_ready(port->aggregator));
 
     aggregator = __get_first_agg(port);
     ad_agg_selection_logic(aggregator, update_slave_arr);
 
     if (!port->aggregator->is_active)
         port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;
 }
 
 /* Decide if "agg" is a better choice for the new active aggregator that
  * the current best, according to the ad_select policy.
  */
 static struct aggregator *ad_agg_selection_test(struct aggregator *best,
                         struct aggregator *curr)
 {
     /* 0. If no best, select current.
      *
      * 1. If the current agg is not individual, and the best is
      *    individual, select current.
      *
      * 2. If current agg is individual and the best is not, keep best.
      *
      * 3. Therefore, current and best are both individual or both not
      *    individual, so:
      *
      * 3a. If current agg partner replied, and best agg partner did not,
      *     select current.
      *
      * 3b. If current agg partner did not reply and best agg partner
      *     did reply, keep best.
      *
      * 4.  Therefore, current and best both have partner replies or
      *     both do not, so perform selection policy:
      *
      * BOND_AD_COUNT: Select by count of ports.  If count is equal,
      *     select by bandwidth.
      *
      * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
      */
     if (!best)
         return curr;
 
     if (!curr->is_individual && best->is_individual)
         return curr;
 
     if (curr->is_individual && !best->is_individual)
         return best;
 
     if (__agg_has_partner(curr) && !__agg_has_partner(best))
         return curr;
 
     if (!__agg_has_partner(curr) && __agg_has_partner(best))
         return best;
 
     switch (__get_agg_selection_mode(curr->lag_ports)) {
     case BOND_AD_COUNT:
         if (__agg_active_ports(curr) > __agg_active_ports(best))
             return curr;
 
         if (__agg_active_ports(curr) < __agg_active_ports(best))
             return best;
 
         fallthrough;
     case BOND_AD_STABLE:
     case BOND_AD_BANDWIDTH:
         if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
             return curr;
 
         break;
 
     default:
         net_warn_ratelimited("%s: (slave %s): Impossible agg select mode %d\n",
                      curr->slave->bond->dev->name,
                      curr->slave->dev->name,
                      __get_agg_selection_mode(curr->lag_ports));
         break;
     }
 
     return best;
 }
 
 static int agg_device_up(const struct aggregator *agg)
 {
     struct port *port = agg->lag_ports;
 
     if (!port)
         return 0;
 
     for (port = agg->lag_ports; port;
          port = port->next_port_in_aggregator) {
         if (netif_running(port->slave->dev) &&
             netif_carrier_ok(port->slave->dev))
             return 1;
     }
 
     return 0;
 }
 
 /**
  * ad_agg_selection_logic - select an aggregation group for a team
  * @agg: the aggregator we're looking at
  * @update_slave_arr: Does slave array need update?
  *
  * It is assumed that only one aggregator may be selected for a team.
  *
  * The logic of this function is to select the aggregator according to
  * the ad_select policy:
  *
  * BOND_AD_STABLE: select the aggregator with the most ports attached to
  * it, and to reselect the active aggregator only if the previous
  * aggregator has no more ports related to it.
  *
  * BOND_AD_BANDWIDTH: select the aggregator with the highest total
  * bandwidth, and reselect whenever a link state change takes place or the
  * set of slaves in the bond changes.
  *
  * BOND_AD_COUNT: select the aggregator with largest number of ports
  * (slaves), and reselect whenever a link state change takes place or the
  * set of slaves in the bond changes.
  *
  * FIXME: this function MUST be called with the first agg in the bond, or
  * __get_active_agg() won't work correctly. This function should be better
  * called with the bond itself, and retrieve the first agg from it.
  */
 static void ad_agg_selection_logic(struct aggregator *agg,
                    bool *update_slave_arr)
 {
     struct aggregator *best, *active, *origin;
     struct bonding *bond = agg->slave->bond;
     struct list_head *iter;
     struct slave *slave;
     struct port *port;
 
     rcu_read_lock();
     origin = agg;
     active = __get_active_agg(agg);
     best = (active && agg_device_up(active)) ? active : NULL;
 
     bond_for_each_slave_rcu(bond, slave, iter) {
         agg = &(SLAVE_AD_INFO(slave)->aggregator);
 
         agg->is_active = 0;
 
         if (__agg_active_ports(agg) && agg_device_up(agg))
             best = ad_agg_selection_test(best, agg);
     }
 
     if (best &&
         __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
         /* For the STABLE policy, don't replace the old active
          * aggregator if it's still active (it has an answering
          * partner) or if both the best and active don't have an
          * answering partner.
          */
         if (active && active->lag_ports &&
             __agg_active_ports(active) &&
             (__agg_has_partner(active) ||
              (!__agg_has_partner(active) &&
              !__agg_has_partner(best)))) {
             if (!(!active->actor_oper_aggregator_key &&
                   best->actor_oper_aggregator_key)) {
                 best = NULL;
                 active->is_active = 1;
             }
         }
     }
 
     if (best && (best == active)) {
         best = NULL;
         active->is_active = 1;
     }
 
     /* if there is new best aggregator, activate it */
     if (best) {
         netdev_dbg(bond->dev, "(slave %s): best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
                best->slave ? best->slave->dev->name : "NULL",
                best->aggregator_identifier, best->num_of_ports,
                best->actor_oper_aggregator_key,
                best->partner_oper_aggregator_key,
                best->is_individual, best->is_active);
         netdev_dbg(bond->dev, "(slave %s): best ports %p slave %p\n",
                best->slave ? best->slave->dev->name : "NULL",
                best->lag_ports, best->slave);
 
         bond_for_each_slave_rcu(bond, slave, iter) {
             agg = &(SLAVE_AD_INFO(slave)->aggregator);
 
             slave_dbg(bond->dev, slave->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
                   agg->aggregator_identifier, agg->num_of_ports,
                   agg->actor_oper_aggregator_key,
                   agg->partner_oper_aggregator_key,
                   agg->is_individual, agg->is_active);
         }
 
         /* check if any partner replies */
         if (best->is_individual)
             net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
                          bond->dev->name);
 
         best->is_active = 1;
         netdev_dbg(bond->dev, "(slave %s): LAG %d chosen as the active LAG\n",
                best->slave ? best->slave->dev->name : "NULL",
                best->aggregator_identifier);
         netdev_dbg(bond->dev, "(slave %s): Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
                best->slave ? best->slave->dev->name : "NULL",
                best->aggregator_identifier, best->num_of_ports,
                best->actor_oper_aggregator_key,
                best->partner_oper_aggregator_key,
                best->is_individual, best->is_active);
 
         /* disable the ports that were related to the former
          * active_aggregator
          */
         if (active) {
             for (port = active->lag_ports; port;
                  port = port->next_port_in_aggregator) {
                 __disable_port(port);
             }
         }
         /* Slave array needs update. */
         *update_slave_arr = true;
     }
 
     /* if the selected aggregator is of join individuals
      * (partner_system is NULL), enable their ports
      */
     active = __get_active_agg(origin);
 
     if (active) {
         if (!__agg_has_partner(active)) {
             for (port = active->lag_ports; port;
                  port = port->next_port_in_aggregator) {
                 __enable_port(port);
             }
             *update_slave_arr = true;
         }
     }
 
     rcu_read_unlock();
 
     bond_3ad_set_carrier(bond);
 }
 
 /**
  * ad_clear_agg - clear a given aggregator's parameters
  * @aggregator: the aggregator we're looking at
  */
 static void ad_clear_agg(struct aggregator *aggregator)
 {
     if (aggregator) {
         aggregator->is_individual = false;
         aggregator->actor_admin_aggregator_key = 0;
         aggregator->actor_oper_aggregator_key = 0;
         eth_zero_addr(aggregator->partner_system.mac_addr_value);
         aggregator->partner_system_priority = 0;
         aggregator->partner_oper_aggregator_key = 0;
         aggregator->receive_state = 0;
         aggregator->transmit_state = 0;
         aggregator->lag_ports = NULL;
         aggregator->is_active = 0;
         aggregator->num_of_ports = 0;
         pr_debug("%s: LAG %d was cleared\n",
              aggregator->slave ?
              aggregator->slave->dev->name : "NULL",
              aggregator->aggregator_identifier);
     }
 }
 
 /**
  * ad_initialize_agg - initialize a given aggregator's parameters
  * @aggregator: the aggregator we're looking at
  */
 static void ad_initialize_agg(struct aggregator *aggregator)
 {
     if (aggregator) {
         ad_clear_agg(aggregator);
 
         eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value);
         aggregator->aggregator_identifier = 0;
         aggregator->slave = NULL;
     }
 }
 
 /**
  * ad_initialize_port - initialize a given port's parameters
  * @port: the port we're looking at
  * @lacp_fast: boolean. whether fast periodic should be used
  */
 static void ad_initialize_port(struct port *port, int lacp_fast)
 {
     static const struct port_params tmpl = {
         .system_priority = 0xffff,
         .key             = 1,
         .port_number     = 1,
         .port_priority   = 0xff,
         .port_state      = 1,
     };
     static const struct lacpdu lacpdu = {
         .subtype        = 0x01,
         .version_number = 0x01,
         .tlv_type_actor_info = 0x01,
         .actor_information_length = 0x14,
         .tlv_type_partner_info = 0x02,
         .partner_information_length = 0x14,
         .tlv_type_collector_info = 0x03,
         .collector_information_length = 0x10,
         .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
     };
 
     if (port) {
         port->actor_port_priority = 0xff;
         port->actor_port_aggregator_identifier = 0;
         port->ntt = false;
         port->actor_admin_port_state = LACP_STATE_AGGREGATION |
                            LACP_STATE_LACP_ACTIVITY;
         port->actor_oper_port_state  = LACP_STATE_AGGREGATION |
                            LACP_STATE_LACP_ACTIVITY;
 
         if (lacp_fast)
             port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT;
 
         memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
         memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
 
         port->is_enabled = true;
         /* private parameters */
         port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;
         port->sm_rx_state = 0;
         port->sm_rx_timer_counter = 0;
         port->sm_periodic_state = 0;
         port->sm_periodic_timer_counter = 0;
         port->sm_mux_state = 0;
         port->sm_mux_timer_counter = 0;
         port->sm_tx_state = 0;
         port->aggregator = NULL;
         port->next_port_in_aggregator = NULL;
         port->transaction_id = 0;
 
         port->sm_churn_actor_timer_counter = 0;
         port->sm_churn_actor_state = 0;
         port->churn_actor_count = 0;
         port->sm_churn_partner_timer_counter = 0;
         port->sm_churn_partner_state = 0;
         port->churn_partner_count = 0;
 
         memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
     }
 }
 
 /**
  * ad_enable_collecting_distributing - enable a port's transmit/receive
  * @port: the port we're looking at
  * @update_slave_arr: Does slave array need update?
  *
  * Enable @port if it's in an active aggregator
  */
 static void ad_enable_collecting_distributing(struct port *port,
                           bool *update_slave_arr)
 {
     if (port->aggregator->is_active) {
         slave_dbg(port->slave->bond->dev, port->slave->dev,
               "Enabling port %d (LAG %d)\n",
               port->actor_port_number,
               port->aggregator->aggregator_identifier);
         __enable_port(port);
         /* Slave array needs update */
         *update_slave_arr = true;
     }
 }
 
 /**
  * ad_disable_collecting_distributing - disable a port's transmit/receive
  * @port: the port we're looking at
  * @update_slave_arr: Does slave array need update?
  */
 static void ad_disable_collecting_distributing(struct port *port,
                            bool *update_slave_arr)
 {
     if (port->aggregator &&
         !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
                    &(null_mac_addr))) {
         slave_dbg(port->slave->bond->dev, port->slave->dev,
               "Disabling port %d (LAG %d)\n",
               port->actor_port_number,
               port->aggregator->aggregator_identifier);
         __disable_port(port);
         /* Slave array needs an update */
         *update_slave_arr = true;
     }
 }
 
 /**
  * ad_marker_info_received - handle receive of a Marker information frame
  * @marker_info: Marker info received
  * @port: the port we're looking at
  */
 static void ad_marker_info_received(struct bond_marker *marker_info,
                     struct port *port)
 {
     struct bond_marker marker;
 
     atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_rx);
     atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_rx);
 
     /* copy the received marker data to the response marker */
     memcpy(&marker, marker_info, sizeof(struct bond_marker));
     /* change the marker subtype to marker response */
     marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
 
     /* send the marker response */
     if (ad_marker_send(port, &marker) >= 0)
         slave_dbg(port->slave->bond->dev, port->slave->dev,
               "Sent Marker Response on port %d\n",
               port->actor_port_number);
 }
 
 /**
  * ad_marker_response_received - handle receive of a marker response frame
  * @marker: marker PDU received
  * @port: the port we're looking at
  *
  * This function does nothing since we decided not to implement send and handle
  * response for marker PDU's, in this stage, but only to respond to marker
  * information.
  */
 static void ad_marker_response_received(struct bond_marker *marker,
                     struct port *port)
 {
     atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_resp_rx);
     atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_resp_rx);
 
     /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
 }
 
 /* ========= AD exported functions to the main bonding code ========= */
 
 /* Check aggregators status in team every T seconds */
 #define AD_AGGREGATOR_SELECTION_TIMER  8
 
 /**
  * bond_3ad_initiate_agg_selection - initate aggregator selection
  * @bond: bonding struct
  * @timeout: timeout value to set
  *
  * Set the aggregation selection timer, to initiate an agg selection in
  * the very near future.  Called during first initialization, and during
  * any down to up transitions of the bond.
  */
 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
 {
     atomic_set(&BOND_AD_INFO(bond).agg_select_timer, timeout);
 }
 
 /**
  * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
  * @bond: bonding struct to work on
  *
  * Can be called only after the mac address of the bond is set.
  */
 void bond_3ad_initialize(struct bonding *bond)
 {
     BOND_AD_INFO(bond).aggregator_identifier = 0;
     BOND_AD_INFO(bond).system.sys_priority =
         bond->params.ad_actor_sys_prio;
     if (is_zero_ether_addr(bond->params.ad_actor_system))
         BOND_AD_INFO(bond).system.sys_mac_addr =
             *((struct mac_addr *)bond->dev->dev_addr);
     else
         BOND_AD_INFO(bond).system.sys_mac_addr =
             *((struct mac_addr *)bond->params.ad_actor_system);
 
     bond_3ad_initiate_agg_selection(bond,
                     AD_AGGREGATOR_SELECTION_TIMER *
                     ad_ticks_per_sec);
 }
 
 /**
  * bond_3ad_bind_slave - initialize a slave's port
  * @slave: slave struct to work on
  *
  * Returns:   0 on success
  *          < 0 on error
  */
 void bond_3ad_bind_slave(struct slave *slave)
 {
     struct bonding *bond = bond_get_bond_by_slave(slave);
     struct port *port;
     struct aggregator *aggregator;
 
     /* check that the slave has not been initialized yet. */
     if (SLAVE_AD_INFO(slave)->port.slave != slave) {
 
         /* port initialization */
         port = &(SLAVE_AD_INFO(slave)->port);
 
         ad_initialize_port(port, bond->params.lacp_fast);
 
         port->slave = slave;
         port->actor_port_number = SLAVE_AD_INFO(slave)->id;
         /* key is determined according to the link speed, duplex and
          * user key
          */
         port->actor_admin_port_key = bond->params.ad_user_port_key << 6;
         ad_update_actor_keys(port, false);
         /* actor system is the bond's system */
         __ad_actor_update_port(port);
         /* tx timer(to verify that no more than MAX_TX_IN_SECOND
          * lacpdu's are sent in one second)
          */
         port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
 
         __disable_port(port);
 
         /* aggregator initialization */
         aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
 
         ad_initialize_agg(aggregator);
 
         aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
         aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
         aggregator->slave = slave;
         aggregator->is_active = 0;
         aggregator->num_of_ports = 0;
     }
 }
 
 /**
  * bond_3ad_unbind_slave - deinitialize a slave's port
  * @slave: slave struct to work on
  *
  * Search for the aggregator that is related to this port, remove the
  * aggregator and assign another aggregator for other port related to it
  * (if any), and remove the port.
  */
 void bond_3ad_unbind_slave(struct slave *slave)
 {
     struct port *port, *prev_port, *temp_port;
     struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
     int select_new_active_agg = 0;
     struct bonding *bond = slave->bond;
     struct slave *slave_iter;
     struct list_head *iter;
     bool dummy_slave_update; /* Ignore this value as caller updates array */
 
     /* Sync against bond_3ad_state_machine_handler() */
     spin_lock_bh(&bond->mode_lock);
     aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
     port = &(SLAVE_AD_INFO(slave)->port);
 
     /* if slave is null, the whole port is not initialized */
     if (!port->slave) {
         slave_warn(bond->dev, slave->dev, "Trying to unbind an uninitialized port\n");
         goto out;
     }
 
     slave_dbg(bond->dev, slave->dev, "Unbinding Link Aggregation Group %d\n",
           aggregator->aggregator_identifier);
 
     /* Tell the partner that this port is not suitable for aggregation */
     port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;
     port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;
     port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;
     port->actor_oper_port_state &= ~LACP_STATE_AGGREGATION;
     __update_lacpdu_from_port(port);
     ad_lacpdu_send(port);
 
     /* check if this aggregator is occupied */
     if (aggregator->lag_ports) {
         /* check if there are other ports related to this aggregator
          * except the port related to this slave(thats ensure us that
          * there is a reason to search for new aggregator, and that we
          * will find one
          */
         if ((aggregator->lag_ports != port) ||
             (aggregator->lag_ports->next_port_in_aggregator)) {
             /* find new aggregator for the related port(s) */
             bond_for_each_slave(bond, slave_iter, iter) {
                 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
                 /* if the new aggregator is empty, or it is
                  * connected to our port only
                  */
                 if (!new_aggregator->lag_ports ||
                     ((new_aggregator->lag_ports == port) &&
                      !new_aggregator->lag_ports->next_port_in_aggregator))
                     break;
             }
             if (!slave_iter)
                 new_aggregator = NULL;
 
             /* if new aggregator found, copy the aggregator's
              * parameters and connect the related lag_ports to the
              * new aggregator
              */
             if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
                 slave_dbg(bond->dev, slave->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
                       aggregator->aggregator_identifier,
                       new_aggregator->aggregator_identifier);
 
                 if ((new_aggregator->lag_ports == port) &&
                     new_aggregator->is_active) {
                     slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
                     select_new_active_agg = 1;
                 }
 
                 new_aggregator->is_individual = aggregator->is_individual;
                 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
                 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
                 new_aggregator->partner_system = aggregator->partner_system;
                 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
                 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
                 new_aggregator->receive_state = aggregator->receive_state;
                 new_aggregator->transmit_state = aggregator->transmit_state;
                 new_aggregator->lag_ports = aggregator->lag_ports;
                 new_aggregator->is_active = aggregator->is_active;
                 new_aggregator->num_of_ports = aggregator->num_of_ports;
 
                 /* update the information that is written on
                  * the ports about the aggregator
                  */
                 for (temp_port = aggregator->lag_ports; temp_port;
                      temp_port = temp_port->next_port_in_aggregator) {
                     temp_port->aggregator = new_aggregator;
                     temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
                 }
 
                 ad_clear_agg(aggregator);
 
                 if (select_new_active_agg)
                     ad_agg_selection_logic(__get_first_agg(port),
                                    &dummy_slave_update);
             } else {
                 slave_warn(bond->dev, slave->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
             }
         } else {
             /* in case that the only port related to this
              * aggregator is the one we want to remove
              */
             select_new_active_agg = aggregator->is_active;
             ad_clear_agg(aggregator);
             if (select_new_active_agg) {
                 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
                 /* select new active aggregator */
                 temp_aggregator = __get_first_agg(port);
                 if (temp_aggregator)
                     ad_agg_selection_logic(temp_aggregator,
                                    &dummy_slave_update);
             }
         }
     }
 
     slave_dbg(bond->dev, slave->dev, "Unbinding port %d\n", port->actor_port_number);
 
     /* find the aggregator that this port is connected to */
     bond_for_each_slave(bond, slave_iter, iter) {
         temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
         prev_port = NULL;
         /* search the port in the aggregator's related ports */
         for (temp_port = temp_aggregator->lag_ports; temp_port;
              prev_port = temp_port,
              temp_port = temp_port->next_port_in_aggregator) {
             if (temp_port == port) {
                 /* the aggregator found - detach the port from
                  * this aggregator
                  */
                 if (prev_port)
                     prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
                 else
                     temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
                 temp_aggregator->num_of_ports--;
                 if (__agg_active_ports(temp_aggregator) == 0) {
                     select_new_active_agg = temp_aggregator->is_active;
                     if (temp_aggregator->num_of_ports == 0)
                         ad_clear_agg(temp_aggregator);
                     if (select_new_active_agg) {
                         slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
                         /* select new active aggregator */
                         ad_agg_selection_logic(__get_first_agg(port),
                                            &dummy_slave_update);
                     }
                 }
                 break;
             }
         }
     }
     port->slave = NULL;
 
 out:
     spin_unlock_bh(&bond->mode_lock);
 }
 
 /**
  * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports
  * @bond: bonding struct to work on
  *
  * If an ad_actor setting gets changed we need to update the individual port
  * settings so the bond device will use the new values when it gets upped.
  */
 void bond_3ad_update_ad_actor_settings(struct bonding *bond)
 {
     struct list_head *iter;
     struct slave *slave;
 
     ASSERT_RTNL();
 
     BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio;
     if (is_zero_ether_addr(bond->params.ad_actor_system))
         BOND_AD_INFO(bond).system.sys_mac_addr =
             *((struct mac_addr *)bond->dev->dev_addr);
     else
         BOND_AD_INFO(bond).system.sys_mac_addr =
             *((struct mac_addr *)bond->params.ad_actor_system);
 
     spin_lock_bh(&bond->mode_lock);
     bond_for_each_slave(bond, slave, iter) {
         struct port *port = &(SLAVE_AD_INFO(slave))->port;
 
         __ad_actor_update_port(port);
         port->ntt = true;
     }
     spin_unlock_bh(&bond->mode_lock);
 }
 
 /**
  * bond_agg_timer_advance - advance agg_select_timer
  * @bond:  bonding structure
  *
  * Return true when agg_select_timer reaches 0.
  */
 static bool bond_agg_timer_advance(struct bonding *bond)
 {
     int val, nval;
 
     while (1) {
         val = atomic_read(&BOND_AD_INFO(bond).agg_select_timer);
         if (!val)
             return false;
         nval = val - 1;
         if (atomic_cmpxchg(&BOND_AD_INFO(bond).agg_select_timer,
                    val, nval) == val)
             break;
     }
     return nval == 0;
 }
 
 /**
  * bond_3ad_state_machine_handler - handle state machines timeout
  * @work: work context to fetch bonding struct to work on from
  *
  * The state machine handling concept in this module is to check every tick
  * which state machine should operate any function. The execution order is
  * round robin, so when we have an interaction between state machines, the
  * reply of one to each other might be delayed until next tick.
  *
  * This function also complete the initialization when the agg_select_timer
  * times out, and it selects an aggregator for the ports that are yet not
  * related to any aggregator, and selects the active aggregator for a bond.
  */
 void bond_3ad_state_machine_handler(struct work_struct *work)
 {
     struct bonding *bond = container_of(work, struct bonding,
                         ad_work.work);
     struct aggregator *aggregator;
     struct list_head *iter;
     struct slave *slave;
     struct port *port;
     bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
     bool update_slave_arr = false;
 
     /* Lock to protect data accessed by all (e.g., port->sm_vars) and
      * against running with bond_3ad_unbind_slave. ad_rx_machine may run
      * concurrently due to incoming LACPDU as well.
      */
     spin_lock_bh(&bond->mode_lock);
     rcu_read_lock();
 
     /* check if there are any slaves */
     if (!bond_has_slaves(bond))
         goto re_arm;
 
     if (bond_agg_timer_advance(bond)) {
         slave = bond_first_slave_rcu(bond);
         port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
 
         /* select the active aggregator for the bond */
         if (port) {
             if (!port->slave) {
                 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
                              bond->dev->name);
                 goto re_arm;
             }
 
             aggregator = __get_first_agg(port);
             ad_agg_selection_logic(aggregator, &update_slave_arr);
         }
         bond_3ad_set_carrier(bond);
     }
 
     /* for each port run the state machines */
     bond_for_each_slave_rcu(bond, slave, iter) {
         port = &(SLAVE_AD_INFO(slave)->port);
         if (!port->slave) {
             net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
                         bond->dev->name);
             goto re_arm;
         }
 
         ad_rx_machine(NULL, port);
         ad_periodic_machine(port, &bond->params);
         ad_port_selection_logic(port, &update_slave_arr);
         ad_mux_machine(port, &update_slave_arr);
         ad_tx_machine(port);
         ad_churn_machine(port);
 
         /* turn off the BEGIN bit, since we already handled it */
         if (port->sm_vars & AD_PORT_BEGIN)
             port->sm_vars &= ~AD_PORT_BEGIN;
     }
 
 re_arm:
     bond_for_each_slave_rcu(bond, slave, iter) {
         if (slave->should_notify) {
             should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
             break;
         }
     }
     rcu_read_unlock();
     spin_unlock_bh(&bond->mode_lock);
 
     if (update_slave_arr)
         bond_slave_arr_work_rearm(bond, 0);
 
     if (should_notify_rtnl && rtnl_trylock()) {
         bond_slave_state_notify(bond);
         rtnl_unlock();
     }
     queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
 }
 
 /**
  * bond_3ad_rx_indication - handle a received frame
  * @lacpdu: received lacpdu
  * @slave: slave struct to work on
  *
  * It is assumed that frames that were sent on this NIC don't returned as new
  * received frames (loopback). Since only the payload is given to this
  * function, it check for loopback.
  */
 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave)
 {
     struct bonding *bond = slave->bond;
     int ret = RX_HANDLER_ANOTHER;
     struct bond_marker *marker;
     struct port *port;
     atomic64_t *stat;
 
     port = &(SLAVE_AD_INFO(slave)->port);
     if (!port->slave) {
         net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
                      slave->dev->name, slave->bond->dev->name);
         return ret;
     }
 
     switch (lacpdu->subtype) {
     case AD_TYPE_LACPDU:
         ret = RX_HANDLER_CONSUMED;
         slave_dbg(slave->bond->dev, slave->dev,
               "Received LACPDU on port %d\n",
               port->actor_port_number);
         /* Protect against concurrent state machines */
         spin_lock(&slave->bond->mode_lock);
         ad_rx_machine(lacpdu, port);
         spin_unlock(&slave->bond->mode_lock);
         break;
     case AD_TYPE_MARKER:
         ret = RX_HANDLER_CONSUMED;
         /* No need to convert fields to Little Endian since we
          * don't use the marker's fields.
          */
         marker = (struct bond_marker *)lacpdu;
         switch (marker->tlv_type) {
         case AD_MARKER_INFORMATION_SUBTYPE:
             slave_dbg(slave->bond->dev, slave->dev, "Received Marker Information on port %d\n",
                   port->actor_port_number);
             ad_marker_info_received(marker, port);
             break;
         case AD_MARKER_RESPONSE_SUBTYPE:
             slave_dbg(slave->bond->dev, slave->dev, "Received Marker Response on port %d\n",
                   port->actor_port_number);
             ad_marker_response_received(marker, port);
             break;
         default:
             slave_dbg(slave->bond->dev, slave->dev, "Received an unknown Marker subtype on port %d\n",
                   port->actor_port_number);
             stat = &SLAVE_AD_INFO(slave)->stats.marker_unknown_rx;
             atomic64_inc(stat);
             stat = &BOND_AD_INFO(bond).stats.marker_unknown_rx;
             atomic64_inc(stat);
         }
         break;
     default:
         atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_unknown_rx);
         atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_unknown_rx);
     }
 
     return ret;
 }
 
 /**
  * ad_update_actor_keys - Update the oper / admin keys for a port based on
  * its current speed and duplex settings.
  *
  * @port: the port we'are looking at
  * @reset: Boolean to just reset the speed and the duplex part of the key
  *
  * The logic to change the oper / admin keys is:
  * (a) A full duplex port can participate in LACP with partner.
  * (b) When the speed is changed, LACP need to be reinitiated.
  */
 static void ad_update_actor_keys(struct port *port, bool reset)
 {
     u8 duplex = 0;
     u16 ospeed = 0, speed = 0;
     u16 old_oper_key = port->actor_oper_port_key;
 
     port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);
     if (!reset) {
         speed = __get_link_speed(port);
         ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;
         duplex = __get_duplex(port);
         port->actor_admin_port_key |= (speed << 1) | duplex;
     }
     port->actor_oper_port_key = port->actor_admin_port_key;
 
     if (old_oper_key != port->actor_oper_port_key) {
         /* Only 'duplex' port participates in LACP */
         if (duplex)
             port->sm_vars |= AD_PORT_LACP_ENABLED;
         else
             port->sm_vars &= ~AD_PORT_LACP_ENABLED;
 
         if (!reset) {
             if (!speed) {
                 slave_err(port->slave->bond->dev,
                       port->slave->dev,
                       "speed changed to 0 on port %d\n",
                       port->actor_port_number);
             } else if (duplex && ospeed != speed) {
                 /* Speed change restarts LACP state-machine */
                 port->sm_vars |= AD_PORT_BEGIN;
             }
         }
     }
 }
 
 /**
  * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
  * change indication
  *
  * @slave: slave struct to work on
  *
  * Handle reselection of aggregator (if needed) for this port.
  */
 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)
 {
     struct port *port;
 
     port = &(SLAVE_AD_INFO(slave)->port);
 
     /* if slave is null, the whole port is not initialized */
     if (!port->slave) {
         slave_warn(slave->bond->dev, slave->dev,
                "speed/duplex changed for uninitialized port\n");
         return;
     }
 
     spin_lock_bh(&slave->bond->mode_lock);
     ad_update_actor_keys(port, false);
     spin_unlock_bh(&slave->bond->mode_lock);
     slave_dbg(slave->bond->dev, slave->dev, "Port %d changed speed/duplex\n",
           port->actor_port_number);
 }
 
 /**
  * bond_3ad_handle_link_change - handle a slave's link status change indication
  * @slave: slave struct to work on
  * @link: whether the link is now up or down
  *
  * Handle reselection of aggregator (if needed) for this port.
  */
 void bond_3ad_handle_link_change(struct slave *slave, char link)
 {
     struct aggregator *agg;
     struct port *port;
     bool dummy;
 
     port = &(SLAVE_AD_INFO(slave)->port);
 
     /* if slave is null, the whole port is not initialized */
     if (!port->slave) {
         slave_warn(slave->bond->dev, slave->dev, "link status changed for uninitialized port\n");
         return;
     }
 
     spin_lock_bh(&slave->bond->mode_lock);
     /* on link down we are zeroing duplex and speed since
      * some of the adaptors(ce1000.lan) report full duplex/speed
      * instead of N/A(duplex) / 0(speed).
      *
      * on link up we are forcing recheck on the duplex and speed since
      * some of he adaptors(ce1000.lan) report.
      */
     if (link == BOND_LINK_UP) {
         port->is_enabled = true;
         ad_update_actor_keys(port, false);
     } else {
         /* link has failed */
         port->is_enabled = false;
         ad_update_actor_keys(port, true);
     }
     agg = __get_first_agg(port);
     ad_agg_selection_logic(agg, &dummy);
 
     spin_unlock_bh(&slave->bond->mode_lock);
 
     slave_dbg(slave->bond->dev, slave->dev, "Port %d changed link status to %s\n",
           port->actor_port_number,
           link == BOND_LINK_UP ? "UP" : "DOWN");
 
     /* RTNL is held and mode_lock is released so it's safe
      * to update slave_array here.
      */
     bond_update_slave_arr(slave->bond, NULL);
 }
 
 /**
  * bond_3ad_set_carrier - set link state for bonding master
  * @bond: bonding structure
  *
  * if we have an active aggregator, we're up, if not, we're down.
  * Presumes that we cannot have an active aggregator if there are
  * no slaves with link up.
  *
  * This behavior complies with IEEE 802.3 section 43.3.9.
  *
  * Called by bond_set_carrier(). Return zero if carrier state does not
  * change, nonzero if it does.
  */
 int bond_3ad_set_carrier(struct bonding *bond)
 {
     struct aggregator *active;
     struct slave *first_slave;
     int ret = 1;
 
     rcu_read_lock();
     first_slave = bond_first_slave_rcu(bond);
     if (!first_slave) {
         ret = 0;
         goto out;
     }
     active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
     if (active) {
         /* are enough slaves available to consider link up? */
         if (__agg_active_ports(active) < bond->params.min_links) {
             if (netif_carrier_ok(bond->dev)) {
                 netif_carrier_off(bond->dev);
                 goto out;
             }
         } else if (!netif_carrier_ok(bond->dev)) {
             netif_carrier_on(bond->dev);
             goto out;
         }
     } else if (netif_carrier_ok(bond->dev)) {
         netif_carrier_off(bond->dev);
     }
 out:
     rcu_read_unlock();
     return ret;
 }
 
 /**
  * __bond_3ad_get_active_agg_info - get information of the active aggregator
  * @bond: bonding struct to work on
  * @ad_info: ad_info struct to fill with the bond's info
  *
  * Returns:   0 on success
  *          < 0 on error
  */
 int __bond_3ad_get_active_agg_info(struct bonding *bond,
                    struct ad_info *ad_info)
 {
     struct aggregator *aggregator = NULL;
     struct list_head *iter;
     struct slave *slave;
     struct port *port;
 
     bond_for_each_slave_rcu(bond, slave, iter) {
         port = &(SLAVE_AD_INFO(slave)->port);
         if (port->aggregator && port->aggregator->is_active) {
             aggregator = port->aggregator;
             break;
         }
     }
 
     if (!aggregator)
         return -1;
 
     ad_info->aggregator_id = aggregator->aggregator_identifier;
     ad_info->ports = __agg_active_ports(aggregator);
     ad_info->actor_key = aggregator->actor_oper_aggregator_key;
     ad_info->partner_key = aggregator->partner_oper_aggregator_key;
     ether_addr_copy(ad_info->partner_system,
             aggregator->partner_system.mac_addr_value);
     return 0;
 }
 
 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
 {
     int ret;
 
     rcu_read_lock();
     ret = __bond_3ad_get_active_agg_info(bond, ad_info);
     rcu_read_unlock();
 
     return ret;
 }
 
 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
              struct slave *slave)
 {
     struct lacpdu *lacpdu, _lacpdu;
 
     if (skb->protocol != PKT_TYPE_LACPDU)
         return RX_HANDLER_ANOTHER;
 
     if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
         return RX_HANDLER_ANOTHER;
 
     lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
     if (!lacpdu) {
         atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_illegal_rx);
         atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_illegal_rx);
         return RX_HANDLER_ANOTHER;
     }
 
     return bond_3ad_rx_indication(lacpdu, slave);
 }
 
 /**
  * bond_3ad_update_lacp_rate - change the lacp rate
  * @bond: bonding struct
  *
  * When modify lacp_rate parameter via sysfs,
  * update actor_oper_port_state of each port.
  *
  * Hold bond->mode_lock,
  * so we can modify port->actor_oper_port_state,
  * no matter bond is up or down.
  */
 void bond_3ad_update_lacp_rate(struct bonding *bond)
 {
     struct port *port = NULL;
     struct list_head *iter;
     struct slave *slave;
     int lacp_fast;
 
     lacp_fast = bond->params.lacp_fast;
     spin_lock_bh(&bond->mode_lock);
     bond_for_each_slave(bond, slave, iter) {
         port = &(SLAVE_AD_INFO(slave)->port);
         if (lacp_fast)
             port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT;
         else
             port->actor_oper_port_state &= ~LACP_STATE_LACP_TIMEOUT;
     }
     spin_unlock_bh(&bond->mode_lock);
 }
 
 size_t bond_3ad_stats_size(void)
 {
     return nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_RX */
            nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_TX */
            nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_UNKNOWN_RX */
            nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_ILLEGAL_RX */
            nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RX */
            nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_TX */
            nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_RX */
            nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_TX */
            nla_total_size_64bit(sizeof(u64)); /* BOND_3AD_STAT_MARKER_UNKNOWN_RX */
 }
 
 int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats)
 {
     u64 val;
 
     val = atomic64_read(&stats->lacpdu_rx);
     if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_RX, val,
                   BOND_3AD_STAT_PAD))
         return -EMSGSIZE;
     val = atomic64_read(&stats->lacpdu_tx);
     if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_TX, val,
                   BOND_3AD_STAT_PAD))
         return -EMSGSIZE;
     val = atomic64_read(&stats->lacpdu_unknown_rx);
     if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_UNKNOWN_RX, val,
                   BOND_3AD_STAT_PAD))
         return -EMSGSIZE;
     val = atomic64_read(&stats->lacpdu_illegal_rx);
     if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_ILLEGAL_RX, val,
                   BOND_3AD_STAT_PAD))
         return -EMSGSIZE;
 
     val = atomic64_read(&stats->marker_rx);
     if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RX, val,
                   BOND_3AD_STAT_PAD))
         return -EMSGSIZE;
     val = atomic64_read(&stats->marker_tx);
     if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_TX, val,
                   BOND_3AD_STAT_PAD))
         return -EMSGSIZE;
     val = atomic64_read(&stats->marker_resp_rx);
     if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_RX, val,
                   BOND_3AD_STAT_PAD))
         return -EMSGSIZE;
     val = atomic64_read(&stats->marker_resp_tx);
     if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_TX, val,
                   BOND_3AD_STAT_PAD))
         return -EMSGSIZE;
     val = atomic64_read(&stats->marker_unknown_rx);
     if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_UNKNOWN_RX, val,
                   BOND_3AD_STAT_PAD))
         return -EMSGSIZE;
 
     return 0;
 }