--- /dev/null
+/*
+ * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ */
+
+#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>
+
+/* General definitions */
+#define AD_SHORT_TIMEOUT 1
+#define AD_LONG_TIMEOUT 0
+#define AD_STANDBY 0x2
+#define AD_MAX_TX_IN_SECOND 3
+#define AD_COLLECTOR_MAX_DELAY 0
+
+/* Timer definitions (43.4.4 in the 802.3ad standard) */
+#define AD_FAST_PERIODIC_TIME 1
+#define AD_SLOW_PERIODIC_TIME 30
+#define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
+#define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
+#define AD_CHURN_DETECTION_TIME 60
+#define AD_AGGREGATE_WAIT_TIME 2
+
+/* Port state definitions (43.4.2.2 in the 802.3ad standard) */
+#define AD_STATE_LACP_ACTIVITY 0x1
+#define AD_STATE_LACP_TIMEOUT 0x2
+#define AD_STATE_AGGREGATION 0x4
+#define AD_STATE_SYNCHRONIZATION 0x8
+#define AD_STATE_COLLECTING 0x10
+#define AD_STATE_DISTRIBUTING 0x20
+#define AD_STATE_DEFAULTED 0x40
+#define AD_STATE_EXPIRED 0x80
+
+/* Port Variables definitions used by the State Machines (43.4.7 in the
+ * 802.3ad standard)
+ */
+#define AD_PORT_BEGIN 0x1
+#define AD_PORT_LACP_ENABLED 0x2
+#define AD_PORT_ACTOR_CHURN 0x4
+#define AD_PORT_PARTNER_CHURN 0x8
+#define AD_PORT_READY 0x10
+#define AD_PORT_READY_N 0x20
+#define AD_PORT_MATCHED 0x40
+#define AD_PORT_STANDBY 0x80
+#define AD_PORT_SELECTED 0x100
+#define AD_PORT_MOVED 0x200
+#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 | Speed | Duplex |
+ * --------------------------------------------------------------
+ * 16 6 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_10000MBPS,
+ AD_LINK_SPEED_20000MBPS,
+ AD_LINK_SPEED_40000MBPS,
+ AD_LINK_SPEED_56000MBPS
+};
+
+/* compare MAC addresses */
+#define MAC_ADDRESS_EQUAL(A, B) \
+ ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
+
+static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } };
+static u16 ad_ticks_per_sec;
+static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
+
+static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
+
+/* ================= main 802.3ad protocol functions ================== */
+static int ad_lacpdu_send(struct port *port);
+static int ad_marker_send(struct port *port, struct bond_marker *marker);
+static void ad_mux_machine(struct port *port, bool *update_slave_arr);
+static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
+static void ad_tx_machine(struct port *port);
+static void ad_periodic_machine(struct port *port);
+static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
+static void ad_agg_selection_logic(struct aggregator *aggregator,
+ bool *update_slave_arr);
+static void ad_clear_agg(struct aggregator *aggregator);
+static void ad_initialize_agg(struct aggregator *aggregator);
+static void ad_initialize_port(struct port *port, int lacp_fast);
+static void ad_enable_collecting_distributing(struct port *port,
+ bool *update_slave_arr);
+static void ad_disable_collecting_distributing(struct port *port,
+ bool *update_slave_arr);
+static void ad_marker_info_received(struct bond_marker *marker_info,
+ struct port *port);
+static void ad_marker_response_received(struct bond_marker *marker,
+ struct port *port);
+
+
+/* ================= 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
+ * @bond: the bond 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 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_10000MBPS
+ * %AD_LINK_SPEED_20000MBPS
+ * %AD_LINK_SPEED_40000MBPS
+ * %AD_LINK_SPEED_56000MBPS
+ */
+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_10000:
+ speed = AD_LINK_SPEED_10000MBPS;
+ break;
+
+ case SPEED_20000:
+ speed = AD_LINK_SPEED_20000MBPS;
+ break;
+
+ case SPEED_40000:
+ speed = AD_LINK_SPEED_40000MBPS;
+ break;
+
+ case SPEED_56000:
+ speed = AD_LINK_SPEED_56000MBPS;
+ break;
+
+ default:
+ /* unknown speed value from ethtool. shouldn't happen */
+ speed = 0;
+ break;
+ }
+ }
+
+ netdev_dbg(slave->bond->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;
+
+ /* handling a special case: when the configuration starts with
+ * link down, it sets the duplex to 0.
+ */
+ if (slave->link != BOND_LINK_UP) {
+ retval = 0x0;
+ } else {
+ switch (slave->duplex) {
+ case DUPLEX_FULL:
+ retval = 0x1;
+ netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n",
+ port->actor_port_number);
+ break;
+ case DUPLEX_HALF:
+ default:
+ retval = 0x0;
+ netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n",
+ port->actor_port_number);
+ break;
+ }
+ }
+ return retval;
+}
+
+/* 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 & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
+ ((lacpdu->actor_state & AD_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 &= ~AD_STATE_DEFAULTED;
+
+ /* set the partner sync. to on if the partner is sync,
+ * and the port is matched
+ */
+ if ((port->sm_vars & AD_PORT_MATCHED) &&
+ (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
+ partner->port_state |= AD_STATE_SYNCHRONIZATION;
+ pr_debug("%s partner sync=1\n", port->slave->dev->name);
+ } else {
+ partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
+ pr_debug("%s partner sync=0\n", port->slave->dev->name);
+ }
+ }
+}
+
+/**
+ * __record_default - record default parameters
+ * @port: the port we're looking at
+ *
+ * This function records the default parameter values for the partner carried
+ * in the Partner Admin parameters as the current partner operational parameter
+ * values and sets actor_oper_port_state.defaulted to TRUE.
+ */
+static void __record_default(struct port *port)
+{
+ if (port) {
+ /* record the partner admin parameters */
+ memcpy(&port->partner_oper, &port->partner_admin,
+ sizeof(struct port_params));
+
+ /* set actor_oper_port_state.defaulted to true */
+ port->actor_oper_port_state |= AD_STATE_DEFAULTED;
+ }
+}
+
+/**
+ * __update_selected - update a port's Selected variable from a received lacpdu
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * Update the value of the selected variable, using parameter values from a
+ * newly received lacpdu. The parameter values for the Actor carried in the
+ * received PDU are compared with the corresponding operational parameter
+ * values for the ports partner. If one or more of the comparisons shows that
+ * the value(s) received in the PDU differ from the current operational values,
+ * then selected is set to FALSE and actor_oper_port_state.synchronization is
+ * set to out_of_sync. Otherwise, selected remains unchanged.
+ */
+static void __update_selected(struct lacpdu *lacpdu, struct port *port)
+{
+ if (lacpdu && port) {
+ const struct port_params *partner = &port->partner_oper;
+
+ /* check if any parameter is different 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 & AD_STATE_AGGREGATION) != (partner->port_state & AD_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 & AD_STATE_AGGREGATION)
+ != (oper->port_state & AD_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 & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
+ ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
+ ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
+ ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
+ ) {
+ port->ntt = true;
+ }
+ }
+}
+
+/**
+ * __agg_ports_are_ready - check if all ports in an aggregator are ready
+ * @aggregator: the aggregator we're looking at
+ *
+ */
+static int __agg_ports_are_ready(struct aggregator *aggregator)
+{
+ struct port *port;
+ int retval = 1;
+
+ if (aggregator) {
+ /* scan all ports in this aggregator to verfy if they are
+ * all ready.
+ */
+ for (port = aggregator->lag_ports;
+ port;
+ port = port->next_port_in_aggregator) {
+ if (!(port->sm_vars & AD_PORT_READY_N)) {
+ retval = 0;
+ break;
+ }
+ }
+ }
+
+ return retval;
+}
+
+/**
+ * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
+ * @aggregator: the aggregator we're looking at
+ * @val: Should the ports' ready bit be set on or off
+ *
+ */
+static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
+{
+ struct port *port;
+
+ for (port = aggregator->lag_ports; port;
+ port = port->next_port_in_aggregator) {
+ if (val)
+ port->sm_vars |= AD_PORT_READY;
+ else
+ port->sm_vars &= ~AD_PORT_READY;
+ }
+}
+
+/**
+ * __get_agg_bandwidth - get the total bandwidth of an aggregator
+ * @aggregator: the aggregator we're looking at
+ *
+ */
+static u32 __get_agg_bandwidth(struct aggregator *aggregator)
+{
+ u32 bandwidth = 0;
+
+ if (aggregator->num_of_ports) {
+ switch (__get_link_speed(aggregator->lag_ports)) {
+ case AD_LINK_SPEED_1MBPS:
+ bandwidth = aggregator->num_of_ports;
+ break;
+ case AD_LINK_SPEED_10MBPS:
+ bandwidth = aggregator->num_of_ports * 10;
+ break;
+ case AD_LINK_SPEED_100MBPS:
+ bandwidth = aggregator->num_of_ports * 100;
+ break;
+ case AD_LINK_SPEED_1000MBPS:
+ bandwidth = aggregator->num_of_ports * 1000;
+ break;
+ case AD_LINK_SPEED_2500MBPS:
+ bandwidth = aggregator->num_of_ports * 2500;
+ break;
+ case AD_LINK_SPEED_10000MBPS:
+ bandwidth = aggregator->num_of_ports * 10000;
+ break;
+ case AD_LINK_SPEED_20000MBPS:
+ bandwidth = aggregator->num_of_ports * 20000;
+ break;
+ case AD_LINK_SPEED_40000MBPS:
+ bandwidth = aggregator->num_of_ports * 40000;
+ break;
+ case AD_LINK_SPEED_56000MBPS:
+ bandwidth = aggregator->num_of_ports * 56000;
+ 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;
+ pr_debug("update lacpdu: %s, actor port state %x\n",
+ port->slave->dev->name, port->actor_oper_port_state);
+
+ /* lacpdu->reserved_3_1 initialized
+ * lacpdu->tlv_type_partner_info initialized
+ * lacpdu->partner_information_length initialized
+ */
+
+ lacpdu->partner_system_priority = htons(partner->system_priority);
+ lacpdu->partner_system = partner->system;
+ lacpdu->partner_key = htons(partner->key);
+ lacpdu->partner_port_priority = htons(partner->port_priority);
+ lacpdu->partner_port = htons(partner->port_number);
+ lacpdu->partner_state = partner->port_state;
+
+ /* lacpdu->reserved_3_2 initialized
+ * lacpdu->tlv_type_collector_info initialized
+ * lacpdu->collector_information_length initialized
+ * collector_max_delay initialized
+ * reserved_12[12] initialized
+ * tlv_type_terminator initialized
+ * terminator_length initialized
+ * reserved_50[50] initialized
+ */
+}
+
+/* ================= main 802.3ad protocol code ========================= */
+
+/**
+ * ad_lacpdu_send - send out a lacpdu packet on a given port
+ * @port: the port we're looking at
+ *
+ * Returns: 0 on success
+ * < 0 on error
+ */
+static int ad_lacpdu_send(struct port *port)
+{
+ struct slave *slave = port->slave;
+ struct sk_buff *skb;
+ struct lacpdu_header *lacpdu_header;
+ int length = sizeof(struct lacpdu_header);
+
+ skb = dev_alloc_skb(length);
+ if (!skb)
+ return -ENOMEM;
+
+ skb->dev = slave->dev;
+ skb_reset_mac_header(skb);
+ skb->network_header = skb->mac_header + ETH_HLEN;
+ skb->protocol = PKT_TYPE_LACPDU;
+ skb->priority = TC_PRIO_CONTROL;
+
+ lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
+
+ 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;
+
+ skb_reserve(skb, 16);
+
+ skb->dev = slave->dev;
+ skb_reset_mac_header(skb);
+ skb->network_header = skb->mac_header + ETH_HLEN;
+ skb->protocol = PKT_TYPE_LACPDU;
+
+ marker_header = (struct bond_marker_header *)skb_put(skb, length);
+
+ 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 & AD_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 |=
+ AD_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 & AD_STATE_SYNCHRONIZATION) ||
+ !(port->actor_oper_port_state & AD_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);
+ }
+ }
+ break;
+ default:
+ break;
+ }
+ }
+
+ /* check if the state machine was changed */
+ if (port->sm_mux_state != last_state) {
+ pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
+ port->actor_port_number,
+ port->slave->dev->name,
+ last_state,
+ port->sm_mux_state);
+ switch (port->sm_mux_state) {
+ case AD_MUX_DETACHED:
+ port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
+ ad_disable_collecting_distributing(port,
+ update_slave_arr);
+ port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
+ port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
+ port->ntt = true;
+ break;
+ case AD_MUX_WAITING:
+ port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
+ break;
+ case AD_MUX_ATTACHED:
+ if (port->aggregator->is_active)
+ port->actor_oper_port_state |=
+ AD_STATE_SYNCHRONIZATION;
+ else
+ port->actor_oper_port_state &=
+ ~AD_STATE_SYNCHRONIZATION;
+ port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
+ port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
+ ad_disable_collecting_distributing(port,
+ update_slave_arr);
+ port->ntt = true;
+ break;
+ case AD_MUX_COLLECTING_DISTRIBUTING:
+ port->actor_oper_port_state |= AD_STATE_COLLECTING;
+ port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
+ port->actor_oper_port_state |= AD_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;
+
+ /* 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_vars & AD_PORT_MOVED))
+ 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->sm_vars & AD_PORT_MOVED)
+ port->sm_rx_state = AD_RX_INITIALIZE;
+ else 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)) {
+ pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
+ port->actor_port_number,
+ port->slave->dev->name,
+ 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 &= ~AD_STATE_EXPIRED;
+ port->sm_vars &= ~AD_PORT_MOVED;
+ port->sm_rx_state = AD_RX_PORT_DISABLED;
+
+ /* Fall Through */
+ case AD_RX_PORT_DISABLED:
+ port->sm_vars &= ~AD_PORT_MATCHED;
+ break;
+ case AD_RX_LACP_DISABLED:
+ port->sm_vars &= ~AD_PORT_SELECTED;
+ __record_default(port);
+ port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
+ port->sm_vars |= AD_PORT_MATCHED;
+ port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
+ break;
+ case AD_RX_EXPIRED:
+ /* Reset of the Synchronization flag (Standard 43.4.12)
+ * This reset cause to disable this port in the
+ * COLLECTING_DISTRIBUTING state of the mux machine in
+ * case of EXPIRED even if LINK_DOWN didn't arrive for
+ * the port.
+ */
+ port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
+ port->sm_vars &= ~AD_PORT_MATCHED;
+ port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT;
+ port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
+ port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
+ port->actor_oper_port_state |= AD_STATE_EXPIRED;
+ 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 &= ~AD_STATE_EXPIRED;
+ break;
+ case AD_RX_CURRENT:
+ /* detect loopback situation */
+ if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
+ &(port->actor_system))) {
+ netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n"
+ "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
+ port->slave->dev->name);
+ return;
+ }
+ __update_selected(lacpdu, port);
+ __update_ntt(lacpdu, port);
+ __record_pdu(lacpdu, port);
+ port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
+ port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
+ break;
+ default:
+ 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 & AD_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 & AD_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) {
+ pr_debug("Sent LACPDU on port %d\n",
+ port->actor_port_number);
+
+ /* mark ntt as false, so it will not be sent
+ * again until demanded
+ */
+ port->ntt = false;
+ }
+ }
+ /* restart tx timer(to verify that we will not exceed
+ * AD_MAX_TX_IN_SECOND
+ */
+ port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
+ }
+}
+
+/**
+ * ad_periodic_machine - handle a port's periodic state machine
+ * @port: the port we're looking at
+ *
+ * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
+ */
+static void ad_periodic_machine(struct port *port)
+{
+ periodic_states_t last_state;
+
+ /* keep current state machine state to compare later if it was changed */
+ last_state = port->sm_periodic_state;
+
+ /* check if port was reinitialized */
+ if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
+ (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
+ ) {
+ port->sm_periodic_state = AD_NO_PERIODIC;
+ }
+ /* 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
+ & AD_STATE_LACP_TIMEOUT))
+ port->sm_periodic_state = AD_SLOW_PERIODIC;
+ break;
+ case AD_SLOW_PERIODIC:
+ if ((port->partner_oper.port_state & AD_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 &
+ AD_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) {
+ pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
+ port->actor_port_number, last_state,
+ port->sm_periodic_state);
+ switch (port->sm_periodic_state) {
+ case AD_NO_PERIODIC:
+ port->sm_periodic_timer_counter = 0;
+ 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;
+
+ netdev_dbg(bond->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: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
+ port->slave->bond->dev->name,
+ port->actor_port_number,
+ port->slave->dev->name,
+ 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;
+ netdev_dbg(bond->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;
+
+ netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n",
+ port->actor_port_number,
+ port->aggregator->aggregator_identifier);
+ } else {
+ netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n",
+ port->actor_port_number, port->slave->dev->name);
+ }
+ }
+ /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
+ * in all aggregator's ports, else set ready=FALSE in all
+ * aggregator's ports
+ */
+ __set_agg_ports_ready(port->aggregator,
+ __agg_ports_are_ready(port->aggregator));
+
+ aggregator = __get_first_agg(port);
+ ad_agg_selection_logic(aggregator, update_slave_arr);
+
+ if (!port->aggregator->is_active)
+ port->actor_oper_port_state &= ~AD_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 (curr->num_of_ports > best->num_of_ports)
+ return curr;
+
+ if (curr->num_of_ports < best->num_of_ports)
+ return best;
+
+ /*FALLTHROUGH*/
+ case BOND_AD_STABLE:
+ case BOND_AD_BANDWIDTH:
+ if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
+ return curr;
+
+ break;
+
+ default:
+ net_warn_ratelimited("%s: Impossible agg select mode %d\n",
+ curr->slave->bond->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;
+
+ return netif_running(port->slave->dev) &&
+ netif_carrier_ok(port->slave->dev);
+}
+
+/**
+ * ad_agg_selection_logic - select an aggregation group for a team
+ * @aggregator: the aggregator we're looking at
+ * @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->num_of_ports && 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 &&
+ active->lag_ports->is_enabled &&
+ (__agg_has_partner(active) ||
+ (!__agg_has_partner(active) &&
+ !__agg_has_partner(best)))) {
+ if (!(!active->actor_oper_aggregator_key &&
+ best->actor_oper_aggregator_key)) {
+ best = NULL;
+ active->is_active = 1;
+ }
+ }
+ }
+
+ if (best && (best == active)) {
+ best = NULL;
+ active->is_active = 1;
+ }
+
+ /* if there is new best aggregator, activate it */
+ if (best) {
+ netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
+ best->aggregator_identifier, best->num_of_ports,
+ best->actor_oper_aggregator_key,
+ best->partner_oper_aggregator_key,
+ best->is_individual, best->is_active);
+ netdev_dbg(bond->dev, "best ports %p slave %p %s\n",
+ best->lag_ports, best->slave,
+ best->slave ? best->slave->dev->name : "NULL");
+
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ agg = &(SLAVE_AD_INFO(slave)->aggregator);
+
+ netdev_dbg(bond->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 replys */
+ if (best->is_individual) {
+ net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
+ best->slave ?
+ best->slave->bond->dev->name : "NULL");
+ }
+
+ best->is_active = 1;
+ netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n",
+ best->aggregator_identifier);
+ netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
+ best->aggregator_identifier, best->num_of_ports,
+ best->actor_oper_aggregator_key,
+ best->partner_oper_aggregator_key,
+ best->is_individual, best->is_active);
+
+ /* disable the ports that were related to the former
+ * active_aggregator
+ */
+ if (active) {
+ for (port = active->lag_ports; port;
+ port = port->next_port_in_aggregator) {
+ __disable_port(port);
+ }
+ }
+ /* 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);
+ }
+ }
+ }
+
+ 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;
+ aggregator->partner_system = null_mac_addr;
+ aggregator->partner_system_priority = 0;
+ aggregator->partner_oper_aggregator_key = 0;
+ aggregator->receive_state = 0;
+ aggregator->transmit_state = 0;
+ aggregator->lag_ports = NULL;
+ aggregator->is_active = 0;
+ aggregator->num_of_ports = 0;
+ pr_debug("LAG %d was cleared\n",
+ aggregator->aggregator_identifier);
+ }
+}
+
+/**
+ * ad_initialize_agg - initialize a given aggregator's parameters
+ * @aggregator: the aggregator we're looking at
+ */
+static void ad_initialize_agg(struct aggregator *aggregator)
+{
+ if (aggregator) {
+ ad_clear_agg(aggregator);
+
+ aggregator->aggregator_mac_address = null_mac_addr;
+ aggregator->aggregator_identifier = 0;
+ aggregator->slave = NULL;
+ }
+}
+
+/**
+ * ad_initialize_port - initialize a given port's parameters
+ * @aggregator: the aggregator we're looking at
+ * @lacp_fast: boolean. whether fast periodic should be used
+ */
+static void ad_initialize_port(struct port *port, int lacp_fast)
+{
+ static const struct port_params tmpl = {
+ .system_priority = 0xffff,
+ .key = 1,
+ .port_number = 1,
+ .port_priority = 0xff,
+ .port_state = 1,
+ };
+ static const struct lacpdu lacpdu = {
+ .subtype = 0x01,
+ .version_number = 0x01,
+ .tlv_type_actor_info = 0x01,
+ .actor_information_length = 0x14,
+ .tlv_type_partner_info = 0x02,
+ .partner_information_length = 0x14,
+ .tlv_type_collector_info = 0x03,
+ .collector_information_length = 0x10,
+ .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
+ };
+
+ if (port) {
+ port->actor_port_priority = 0xff;
+ port->actor_port_aggregator_identifier = 0;
+ port->ntt = false;
+ port->actor_admin_port_state = AD_STATE_AGGREGATION |
+ AD_STATE_LACP_ACTIVITY;
+ port->actor_oper_port_state = AD_STATE_AGGREGATION |
+ AD_STATE_LACP_ACTIVITY;
+
+ if (lacp_fast)
+ port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
+
+ memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
+ memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
+
+ port->is_enabled = true;
+ /* private parameters */
+ port->sm_vars = 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) {
+ pr_debug("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))) {
+ pr_debug("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;
+
+ /* 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) {
+ pr_debug("Sent Marker Response on port %d\n",
+ port->actor_port_number);
+ }
+}
+
+/**
+ * ad_marker_response_received - handle receive of a marker response frame
+ * @marker: marker PDU received
+ * @port: the port we're looking at
+ *
+ * This function does nothing since we decided not to implement send and handle
+ * response for marker PDU's, in this stage, but only to respond to marker
+ * information.
+ */
+static void ad_marker_response_received(struct bond_marker *marker,
+ struct port *port)
+{
+ marker = NULL;
+ port = NULL;
+ /* 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
+ *
+ * Set the aggregation selection timer, to initiate an agg selection in
+ * the very near future. Called during first initialization, and during
+ * any down to up transitions of the bond.
+ */
+void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
+{
+ BOND_AD_INFO(bond).agg_select_timer = timeout;
+}
+
+/**
+ * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
+ * @bond: bonding struct to work on
+ * @tick_resolution: tick duration (millisecond resolution)
+ *
+ * Can be called only after the mac address of the bond is set.
+ */
+void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
+{
+ /* check that the bond is not initialized yet */
+ if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
+ bond->dev->dev_addr)) {
+
+ BOND_AD_INFO(bond).aggregator_identifier = 0;
+
+ BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
+ BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
+
+ /* initialize how many times this module is called in one
+ * second (should be about every 100ms)
+ */
+ ad_ticks_per_sec = tick_resolution;
+
+ bond_3ad_initiate_agg_selection(bond,
+ AD_AGGREGATOR_SELECTION_TIMER *
+ ad_ticks_per_sec);
+ }
+}
+
+/**
+ * bond_3ad_bind_slave - initialize a slave's port
+ * @slave: slave struct to work on
+ *
+ * Returns: 0 on success
+ * < 0 on error
+ */
+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(which
+ * is yet not supported)
+ */
+ port->actor_admin_port_key = 0;
+ port->actor_admin_port_key |= __get_duplex(port);
+ port->actor_admin_port_key |= (__get_link_speed(port) << 1);
+ port->actor_oper_port_key = port->actor_admin_port_key;
+ /* if the port is not full duplex, then the port should be not
+ * lacp Enabled
+ */
+ if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
+ port->sm_vars &= ~AD_PORT_LACP_ENABLED;
+ /* actor system is the bond's system */
+ port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
+ /* tx timer(to verify that no more than MAX_TX_IN_SECOND
+ * lacpdu's are sent in one second)
+ */
+ port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
+
+ __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) {
+ netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n",
+ slave->dev->name);
+ goto out;
+ }
+
+ netdev_dbg(bond->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 &= ~AD_STATE_AGGREGATION;
+ __update_lacpdu_from_port(port);
+ ad_lacpdu_send(port);
+
+ /* check if this aggregator is occupied */
+ if (aggregator->lag_ports) {
+ /* check if there are other ports related to this aggregator
+ * except the port related to this slave(thats ensure us that
+ * there is a reason to search for new aggregator, and that we
+ * will find one
+ */
+ if ((aggregator->lag_ports != port) ||
+ (aggregator->lag_ports->next_port_in_aggregator)) {
+ /* find new aggregator for the related port(s) */
+ 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))) {
+ netdev_dbg(bond->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) {
+ netdev_info(bond->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 {
+ netdev_warn(bond->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) {
+ netdev_info(bond->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);
+ }
+ }
+ }
+
+ netdev_dbg(bond->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 (temp_aggregator->num_of_ports == 0) {
+ select_new_active_agg = temp_aggregator->is_active;
+ ad_clear_agg(temp_aggregator);
+ if (select_new_active_agg) {
+ netdev_info(bond->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_state_machine_handler - handle state machines timeout
+ * @bond: bonding struct to work on
+ *
+ * The state machine handling concept in this module is to check every tick
+ * which state machine should operate any function. The execution order is
+ * round robin, so when we have an interaction between state machines, the
+ * reply of one to each other might be delayed until next tick.
+ *
+ * This function also complete the initialization when the agg_select_timer
+ * times out, and it selects an aggregator for the ports that are yet not
+ * related to any aggregator, and selects the active aggregator for a bond.
+ */
+void bond_3ad_state_machine_handler(struct work_struct *work)
+{
+ struct bonding *bond = container_of(work, struct bonding,
+ ad_work.work);
+ struct 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;
+
+ /* check if agg_select_timer timer after initialize is timed out */
+ if (BOND_AD_INFO(bond).agg_select_timer &&
+ !(--BOND_AD_INFO(bond).agg_select_timer)) {
+ slave = bond_first_slave_rcu(bond);
+ port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
+
+ /* select the active aggregator for the bond */
+ if (port) {
+ if (!port->slave) {
+ net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
+ bond->dev->name);
+ goto re_arm;
+ }
+
+ aggregator = __get_first_agg(port);
+ ad_agg_selection_logic(aggregator, &update_slave_arr);
+ }
+ bond_3ad_set_carrier(bond);
+ }
+
+ /* for each port run the state machines */
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ port = &(SLAVE_AD_INFO(slave)->port);
+ if (!port->slave) {
+ net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
+ bond->dev->name);
+ goto re_arm;
+ }
+
+ ad_rx_machine(NULL, port);
+ ad_periodic_machine(port);
+ ad_port_selection_logic(port, &update_slave_arr);
+ ad_mux_machine(port, &update_slave_arr);
+ ad_tx_machine(port);
+ ad_churn_machine(port);
+
+ /* turn off the BEGIN bit, since we already handled it */
+ if (port->sm_vars & AD_PORT_BEGIN)
+ port->sm_vars &= ~AD_PORT_BEGIN;
+ }
+
+re_arm:
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ if (slave->should_notify) {
+ should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
+ break;
+ }
+ }
+ rcu_read_unlock();
+ spin_unlock_bh(&bond->mode_lock);
+
+ if (update_slave_arr)
+ bond_slave_arr_work_rearm(bond, 0);
+
+ if (should_notify_rtnl && rtnl_trylock()) {
+ bond_slave_state_notify(bond);
+ rtnl_unlock();
+ }
+ queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
+}
+
+/**
+ * bond_3ad_rx_indication - handle a received frame
+ * @lacpdu: received lacpdu
+ * @slave: slave struct to work on
+ * @length: length of the data received
+ *
+ * It is assumed that frames that were sent on this NIC don't returned as new
+ * received frames (loopback). Since only the payload is given to this
+ * function, it check for loopback.
+ */
+static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
+ u16 length)
+{
+ struct port *port;
+ int ret = RX_HANDLER_ANOTHER;
+
+ if (length >= sizeof(struct lacpdu)) {
+
+ port = &(SLAVE_AD_INFO(slave)->port);
+
+ if (!port->slave) {
+ 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;
+ netdev_dbg(slave->bond->dev,
+ "Received LACPDU on port %d slave %s\n",
+ port->actor_port_number,
+ slave->dev->name);
+ /* 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.
+ */
+
+ switch (((struct bond_marker *)lacpdu)->tlv_type) {
+ case AD_MARKER_INFORMATION_SUBTYPE:
+ netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n",
+ port->actor_port_number);
+ ad_marker_info_received((struct bond_marker *)lacpdu, port);
+ break;
+
+ case AD_MARKER_RESPONSE_SUBTYPE:
+ netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n",
+ port->actor_port_number);
+ ad_marker_response_received((struct bond_marker *)lacpdu, port);
+ break;
+
+ default:
+ netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n",
+ port->actor_port_number);
+ }
+ }
+ }
+ return ret;
+}
+
+/**
+ * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
+ * @slave: slave struct to work on
+ *
+ * Handle reselection of aggregator (if needed) for this port.
+ */
+void bond_3ad_adapter_speed_changed(struct slave *slave)
+{
+ struct port *port;
+
+ port = &(SLAVE_AD_INFO(slave)->port);
+
+ /* if slave is null, the whole port is not initialized */
+ if (!port->slave) {
+ netdev_warn(slave->bond->dev, "speed changed for uninitialized port on %s\n",
+ slave->dev->name);
+ return;
+ }
+
+ spin_lock_bh(&slave->bond->mode_lock);
+
+ port->actor_admin_port_key &= ~AD_SPEED_KEY_MASKS;
+ port->actor_admin_port_key |= __get_link_speed(port) << 1;
+ port->actor_oper_port_key = port->actor_admin_port_key;
+ netdev_dbg(slave->bond->dev, "Port %d changed speed\n", port->actor_port_number);
+ /* there is no need to reselect a new aggregator, just signal the
+ * state machines to reinitialize
+ */
+ port->sm_vars |= AD_PORT_BEGIN;
+
+ spin_unlock_bh(&slave->bond->mode_lock);
+}
+
+/**
+ * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
+ * @slave: slave struct to work on
+ *
+ * Handle reselection of aggregator (if needed) for this port.
+ */
+void bond_3ad_adapter_duplex_changed(struct slave *slave)
+{
+ struct port *port;
+
+ port = &(SLAVE_AD_INFO(slave)->port);
+
+ /* if slave is null, the whole port is not initialized */
+ if (!port->slave) {
+ netdev_warn(slave->bond->dev, "duplex changed for uninitialized port on %s\n",
+ slave->dev->name);
+ return;
+ }
+
+ spin_lock_bh(&slave->bond->mode_lock);
+
+ port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS;
+ port->actor_admin_port_key |= __get_duplex(port);
+ port->actor_oper_port_key = port->actor_admin_port_key;
+ netdev_dbg(slave->bond->dev, "Port %d slave %s changed duplex\n",
+ port->actor_port_number, slave->dev->name);
+ if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
+ port->sm_vars |= AD_PORT_LACP_ENABLED;
+ /* there is no need to reselect a new aggregator, just signal the
+ * state machines to reinitialize
+ */
+ port->sm_vars |= AD_PORT_BEGIN;
+
+ spin_unlock_bh(&slave->bond->mode_lock);
+}
+
+/**
+ * bond_3ad_handle_link_change - handle a slave's link status change indication
+ * @slave: slave struct to work on
+ * @status: whether the link is now up or down
+ *
+ * Handle reselection of aggregator (if needed) for this port.
+ */
+void bond_3ad_handle_link_change(struct slave *slave, char link)
+{
+ struct port *port;
+
+ port = &(SLAVE_AD_INFO(slave)->port);
+
+ /* if slave is null, the whole port is not initialized */
+ if (!port->slave) {
+ netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n",
+ slave->dev->name);
+ 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.
+ */
+ port->actor_admin_port_key &= ~(AD_DUPLEX_KEY_MASKS|AD_SPEED_KEY_MASKS);
+ if (link == BOND_LINK_UP) {
+ port->is_enabled = true;
+ port->actor_admin_port_key |=
+ (__get_link_speed(port) << 1) | __get_duplex(port);
+ if (port->actor_admin_port_key & AD_DUPLEX_KEY_MASKS)
+ port->sm_vars |= AD_PORT_LACP_ENABLED;
+ } else {
+ /* link has failed */
+ port->is_enabled = false;
+ port->sm_vars &= ~AD_PORT_LACP_ENABLED;
+ }
+ port->actor_oper_port_key = port->actor_admin_port_key;
+ netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n",
+ port->actor_port_number,
+ link == BOND_LINK_UP ? "UP" : "DOWN");
+ /* there is no need to reselect a new aggregator, just signal the
+ * state machines to reinitialize
+ */
+ port->sm_vars |= AD_PORT_BEGIN;
+
+ spin_unlock_bh(&slave->bond->mode_lock);
+
+ /* 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 (active->num_of_ports < 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 = aggregator->num_of_ports;
+ 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)
+ return RX_HANDLER_ANOTHER;
+
+ return bond_3ad_rx_indication(lacpdu, slave, skb->len);
+}
+
+/**
+ * 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 |= AD_STATE_LACP_TIMEOUT;
+ else
+ port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
+ }
+ spin_unlock_bh(&bond->mode_lock);
+}
Code Review / kvmfornfv.git / blobdiff