patch-2.4.22 linux-2.4.22/drivers/net/bonding/bond_3ad.c
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- Lines: 2506
- Date:
2003-08-25 04:44:42.000000000 -0700
- Orig file:
linux-2.4.21/drivers/net/bonding/bond_3ad.c
- Orig date:
1969-12-31 16:00:00.000000000 -0800
diff -urN linux-2.4.21/drivers/net/bonding/bond_3ad.c linux-2.4.22/drivers/net/bonding/bond_3ad.c
@@ -0,0 +1,2505 @@
+/*
+ * Copyright(c) 1999 - 2003 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.
+ *
+ *
+ * Changes:
+ *
+ * 2003/05/01 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and
+ * Amir Noam <amir.noam at intel dot com>
+ * - Added support for lacp_rate module param.
+ *
+ * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com>
+ * - Based on discussion on mailing list, changed locking scheme
+ * to use lock/unlock or lock_bh/unlock_bh appropriately instead
+ * of lock_irqsave/unlock_irqrestore. The new scheme helps exposing
+ * hidden bugs and solves system hangs that occurred due to the fact
+ * that holding lock_irqsave doesn't prevent softirqs from running.
+ * This also increases total throughput since interrupts are not
+ * blocked on each transmitted packets or monitor timeout.
+ *
+ * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com>
+ * - Renamed bond_3ad_link_status_changed() to
+ * bond_3ad_handle_link_change() for compatibility with TLB.
+ *
+ * 2003/05/20 - Amir Noam <amir.noam at intel dot com>
+ * - Fix long fail over time when releasing last slave of an active
+ * aggregator - send LACPDU on unbind of slave to tell partner this
+ * port is no longer aggregatable.
+ *
+ * 2003/06/25 - Tsippy Mendelson <tsippy.mendelson at intel dot com>
+ * - Send LACPDU as highest priority packet to further fix the above
+ * problem on very high Tx traffic load where packets may get dropped
+ * by the slave.
+ */
+
+#include <linux/skbuff.h>
+#include <linux/if_ether.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+#include <linux/ethtool.h>
+#include <linux/if_bonding.h>
+#include <linux/pkt_sched.h>
+#include "bonding.h"
+#include "bond_3ad.h"
+
+// General definitions
+#define AD_SHORT_TIMEOUT 1
+#define AD_LONG_TIMEOUT 0
+#define AD_STANDBY 0x2
+#define AD_MAX_TX_IN_SECOND 3
+#define AD_COLLECTOR_MAX_DELAY 0
+
+// Timer definitions(43.4.4 in the 802.3ad standard)
+#define AD_FAST_PERIODIC_TIME 1
+#define AD_SLOW_PERIODIC_TIME 30
+#define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
+#define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
+#define AD_CHURN_DETECTION_TIME 60
+#define AD_AGGREGATE_WAIT_TIME 2
+
+// Port state definitions(43.4.2.2 in the 802.3ad standard)
+#define AD_STATE_LACP_ACTIVITY 0x1
+#define AD_STATE_LACP_TIMEOUT 0x2
+#define AD_STATE_AGGREGATION 0x4
+#define AD_STATE_SYNCHRONIZATION 0x8
+#define AD_STATE_COLLECTING 0x10
+#define AD_STATE_DISTRIBUTING 0x20
+#define AD_STATE_DEFAULTED 0x40
+#define AD_STATE_EXPIRED 0x80
+
+// Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard)
+#define AD_PORT_BEGIN 0x1
+#define AD_PORT_LACP_ENABLED 0x2
+#define AD_PORT_ACTOR_CHURN 0x4
+#define AD_PORT_PARTNER_CHURN 0x8
+#define AD_PORT_READY 0x10
+#define AD_PORT_READY_N 0x20
+#define AD_PORT_MATCHED 0x40
+#define AD_PORT_STANDBY 0x80
+#define AD_PORT_SELECTED 0x100
+#define AD_PORT_MOVED 0x200
+
+// Port Key definitions
+// key is determined according to the link speed, duplex and
+// user key(which is yet not supported)
+// ------------------------------------------------------------
+// Port key : | User key | Speed |Duplex|
+// ------------------------------------------------------------
+// 16 6 1 0
+#define AD_DUPLEX_KEY_BITS 0x1
+#define AD_SPEED_KEY_BITS 0x3E
+#define AD_USER_KEY_BITS 0xFFC0
+
+//dalloun
+#define AD_LINK_SPEED_BITMASK_1MBPS 0x1
+#define AD_LINK_SPEED_BITMASK_10MBPS 0x2
+#define AD_LINK_SPEED_BITMASK_100MBPS 0x4
+#define AD_LINK_SPEED_BITMASK_1000MBPS 0x8
+//endalloun
+
+// compare MAC addresses
+#define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN)
+
+static struct mac_addr null_mac_addr = {{0, 0, 0, 0, 0, 0}};
+static u16 ad_ticks_per_sec;
+
+// ================= 3AD api to bonding and kernel code ==================
+static u16 __get_link_speed(struct port *port);
+static u8 __get_duplex(struct port *port);
+static inline void __initialize_port_locks(struct port *port);
+static inline void __deinitialize_port_locks(struct port *port);
+//conversions
+static void __ntohs_lacpdu(struct lacpdu *lacpdu);
+static u16 __ad_timer_to_ticks(u16 timer_type, u16 Par);
+
+
+// ================= ad code helper functions ==================
+//needed by ad_rx_machine(...)
+static void __record_pdu(struct lacpdu *lacpdu, struct port *port);
+static void __record_default(struct port *port);
+static void __update_selected(struct lacpdu *lacpdu, struct port *port);
+static void __update_default_selected(struct port *port);
+static void __choose_matched(struct lacpdu *lacpdu, struct port *port);
+static void __update_ntt(struct lacpdu *lacpdu, struct port *port);
+
+//needed for ad_mux_machine(..)
+static void __attach_bond_to_agg(struct port *port);
+static void __detach_bond_from_agg(struct port *port);
+static int __agg_ports_are_ready(struct aggregator *aggregator);
+static void __set_agg_ports_ready(struct aggregator *aggregator, int val);
+
+//needed for ad_agg_selection_logic(...)
+static u32 __get_agg_bandwidth(struct aggregator *aggregator);
+static struct aggregator *__get_active_agg(struct aggregator *aggregator);
+
+
+// ================= main 802.3ad protocol functions ==================
+static int ad_lacpdu_send(struct port *port);
+static int ad_marker_send(struct port *port, struct marker *marker);
+static void ad_mux_machine(struct port *port);
+static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
+static void ad_tx_machine(struct port *port);
+static void ad_periodic_machine(struct port *port);
+static void ad_port_selection_logic(struct port *port);
+static void ad_agg_selection_logic(struct aggregator *aggregator);
+static void ad_clear_agg(struct aggregator *aggregator);
+static void ad_initialize_agg(struct aggregator *aggregator);
+static void ad_initialize_port(struct port *port, int lacp_fast);
+static void ad_initialize_lacpdu(struct lacpdu *Lacpdu);
+static void ad_enable_collecting_distributing(struct port *port);
+static void ad_disable_collecting_distributing(struct port *port);
+static void ad_marker_info_received(struct marker *marker_info, struct port *port);
+static void ad_marker_response_received(struct marker *marker, struct port *port);
+
+
+/////////////////////////////////////////////////////////////////////////////////
+// ================= api to bonding and kernel code ==================
+/////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * __get_bond_by_port - get the port's bonding struct
+ * @port: the port we're looking at
+ *
+ * Return @port's bonding struct, or %NULL if it can't be found.
+ */
+static inline struct bonding *__get_bond_by_port(struct port *port)
+{
+ if (port->slave == NULL) {
+ return NULL;
+ }
+
+ return bond_get_bond_by_slave(port->slave);
+}
+
+/**
+ * __get_first_port - get the first port in the bond
+ * @bond: the bond we're looking at
+ *
+ * Return the port of the first slave in @bond, or %NULL if it can't be found.
+ */
+static inline struct port *__get_first_port(struct bonding *bond)
+{
+ struct slave *slave = bond->next;
+
+ if (slave == (struct slave *)bond) {
+ return NULL;
+ }
+
+ return &(SLAVE_AD_INFO(slave).port);
+}
+
+/**
+ * __get_next_port - get the next port in the bond
+ * @port: the port we're looking at
+ *
+ * Return the port of the slave that is next in line of @port's slave in the
+ * bond, or %NULL if it can't be found.
+ */
+static inline struct port *__get_next_port(struct port *port)
+{
+ struct bonding *bond = __get_bond_by_port(port);
+ struct slave *slave = port->slave;
+
+ // If there's no bond for this port, or this is the last slave
+ if ((bond == NULL) || (slave->next == bond->next)) {
+ return NULL;
+ }
+
+ return &(SLAVE_AD_INFO(slave->next).port);
+}
+
+/**
+ * __get_first_agg - get the first aggregator in the bond
+ * @bond: the bond we're looking at
+ *
+ * Return the aggregator of the first slave in @bond, or %NULL if it can't be
+ * found.
+ */
+static inline struct aggregator *__get_first_agg(struct port *port)
+{
+ struct bonding *bond = __get_bond_by_port(port);
+
+ // If there's no bond for this port, or this is the last slave
+ if ((bond == NULL) || (bond->next == (struct slave *)bond)) {
+ return NULL;
+ }
+
+ return &(SLAVE_AD_INFO(bond->next).aggregator);
+}
+
+/**
+ * __get_next_agg - get the next aggregator in the bond
+ * @aggregator: the aggregator we're looking at
+ *
+ * Return the aggregator of the slave that is next in line of @aggregator's
+ * slave in the bond, or %NULL if it can't be found.
+ */
+static inline struct aggregator *__get_next_agg(struct aggregator *aggregator)
+{
+ struct slave *slave = aggregator->slave;
+ struct bonding *bond = bond_get_bond_by_slave(slave);
+
+ // If there's no bond for this aggregator, or this is the last slave
+ if ((bond == NULL) || (slave->next == bond->next)) {
+ return NULL;
+ }
+
+ return &(SLAVE_AD_INFO(slave->next).aggregator);
+}
+
+/**
+ * __disable_port - disable the port's slave
+ * @port: the port we're looking at
+ *
+ */
+static inline void __disable_port(struct port *port)
+{
+ bond_set_slave_inactive_flags(port->slave);
+}
+
+/**
+ * __enable_port - enable the port's slave, if it's up
+ * @port: the port we're looking at
+ *
+ */
+static inline void __enable_port(struct port *port)
+{
+ struct slave *slave = port->slave;
+
+ if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) {
+ bond_set_slave_active_flags(slave);
+ }
+}
+
+/**
+ * __port_is_enabled - check if the port's slave is in active state
+ * @port: the port we're looking at
+ *
+ */
+static inline int __port_is_enabled(struct port *port)
+{
+ return(port->slave->state == BOND_STATE_ACTIVE);
+}
+
+/**
+ * __get_agg_selection_mode - get the aggregator selection mode
+ * @port: the port we're looking at
+ *
+ * Get the aggregator selection mode. Can be %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 AD_BANDWIDTH;
+ }
+
+ return BOND_AD_INFO(bond).agg_select_mode;
+}
+
+/**
+ * __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_rx_machine_lock - lock the port's RX machine
+ * @port: the port we're looking at
+ *
+ */
+static inline void __get_rx_machine_lock(struct port *port)
+{
+ spin_lock(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
+}
+
+/**
+ * __release_rx_machine_lock - unlock the port's RX machine
+ * @port: the port we're looking at
+ *
+ */
+static inline void __release_rx_machine_lock(struct port *port)
+{
+ spin_unlock(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
+}
+
+/**
+ * __get_link_speed - get a port's speed
+ * @port: the port we're looking at
+ *
+ * Return @port's speed in 802.3ad bitmask format. i.e. one of:
+ * 0,
+ * %AD_LINK_SPEED_BITMASK_10MBPS,
+ * %AD_LINK_SPEED_BITMASK_100MBPS,
+ * %AD_LINK_SPEED_BITMASK_1000MBPS
+ */
+static u16 __get_link_speed(struct port *port)
+{
+ struct slave *slave = port->slave;
+ u16 speed;
+
+ /* this if covers only a special case: when the configuration starts with
+ * link down, it sets the speed to 0.
+ * This is done in spite of the fact that the e100 driver reports 0 to be
+ * compatible with MVT in the future.*/
+ if (slave->link != BOND_LINK_UP) {
+ speed=0;
+ } else {
+ switch (slave->speed) {
+ case SPEED_10:
+ speed = AD_LINK_SPEED_BITMASK_10MBPS;
+ break;
+
+ case SPEED_100:
+ speed = AD_LINK_SPEED_BITMASK_100MBPS;
+ break;
+
+ case SPEED_1000:
+ speed = AD_LINK_SPEED_BITMASK_1000MBPS;
+ break;
+
+ default:
+ speed = 0; // unknown speed value from ethtool. shouldn't happen
+ break;
+ }
+ }
+
+ BOND_PRINT_DBG(("Port %d Received link speed %d update from adapter", 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;
+ BOND_PRINT_DBG(("Port %d Received status full duplex update from adapter", port->actor_port_number));
+ break;
+ case DUPLEX_HALF:
+ default:
+ retval=0x0;
+ BOND_PRINT_DBG(("Port %d Received status NOT full duplex update from adapter", port->actor_port_number));
+ break;
+ }
+ }
+ return retval;
+}
+
+/**
+ * __initialize_port_locks - initialize a port's RX machine spinlock
+ * @port: the port we're looking at
+ *
+ */
+static inline void __initialize_port_locks(struct port *port)
+{
+ // make sure it isn't called twice
+ spin_lock_init(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
+}
+
+/**
+ * __deinitialize_port_locks - deinitialize a port's RX machine spinlock
+ * @port: the port we're looking at
+ *
+ */
+static inline void __deinitialize_port_locks(struct port *port)
+{
+}
+
+//conversions
+/**
+ * __ntohs_lacpdu - convert the contents of a LACPDU to host byte order
+ * @lacpdu: the speicifed lacpdu
+ *
+ * For each multi-byte field in the lacpdu, convert its content
+ */
+static void __ntohs_lacpdu(struct lacpdu *lacpdu)
+{
+ if (lacpdu) {
+ lacpdu->actor_system_priority = ntohs(lacpdu->actor_system_priority);
+ lacpdu->actor_key = ntohs(lacpdu->actor_key);
+ lacpdu->actor_port_priority = ntohs(lacpdu->actor_port_priority);
+ lacpdu->actor_port = ntohs(lacpdu->actor_port);
+ lacpdu->partner_system_priority = ntohs(lacpdu->partner_system_priority);
+ lacpdu->partner_key = ntohs(lacpdu->partner_key);
+ lacpdu->partner_port_priority = ntohs(lacpdu->partner_port_priority);
+ lacpdu->partner_port = ntohs(lacpdu->partner_port);
+ lacpdu->collector_max_delay = ntohs(lacpdu->collector_max_delay);
+ }
+}
+
+/**
+ * __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) { // for short or long timeout
+ retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout
+ } else {
+ retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout
+ }
+ break;
+ case AD_ACTOR_CHURN_TIMER: // for local churn machine
+ retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
+ break;
+ case AD_PERIODIC_TIMER: // for periodic machine
+ retval = (par*ad_ticks_per_sec); // long timeout
+ break;
+ case AD_PARTNER_CHURN_TIMER: // for remote churn machine
+ retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
+ break;
+ case AD_WAIT_WHILE_TIMER: // for selection machine
+ retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
+ break;
+ }
+ return retval;
+}
+
+
+/////////////////////////////////////////////////////////////////////////////////
+// ================= ad_rx_machine helper functions ==================
+/////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * __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)
+{
+ // validate lacpdu and port
+ if (lacpdu && port) {
+ // record the new parameter values for the partner operational
+ port->partner_oper_port_number = lacpdu->actor_port;
+ port->partner_oper_port_priority = lacpdu->actor_port_priority;
+ port->partner_oper_system = lacpdu->actor_system;
+ port->partner_oper_system_priority = lacpdu->actor_system_priority;
+ port->partner_oper_key = lacpdu->actor_key;
+ // zero partener's lase states
+ port->partner_oper_port_state = 0;
+ port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_LACP_ACTIVITY);
+ port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_LACP_TIMEOUT);
+ port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_AGGREGATION);
+ port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION);
+ port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_COLLECTING);
+ port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_DISTRIBUTING);
+ port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_DEFAULTED);
+ port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_EXPIRED);
+
+ // 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)) {
+ port->partner_oper_port_state |= AD_STATE_SYNCHRONIZATION;
+ } else {
+ port->partner_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
+ }
+ }
+}
+
+/**
+ * __record_default - record default parameters
+ * @port: the port we're looking at
+ *
+ * This function records the default parameter values for the partner carried
+ * in the Partner Admin parameters as the current partner operational parameter
+ * values and sets actor_oper_port_state.defaulted to TRUE.
+ */
+static void __record_default(struct port *port)
+{
+ // validate the port
+ if (port) {
+ // record the partner admin parameters
+ port->partner_oper_port_number = port->partner_admin_port_number;
+ port->partner_oper_port_priority = port->partner_admin_port_priority;
+ port->partner_oper_system = port->partner_admin_system;
+ port->partner_oper_system_priority = port->partner_admin_system_priority;
+ port->partner_oper_key = port->partner_admin_key;
+ port->partner_oper_port_state = port->partner_admin_port_state;
+
+ // 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)
+{
+ // validate lacpdu and port
+ if (lacpdu && port) {
+ // check if any parameter is different
+ if ((lacpdu->actor_port != port->partner_oper_port_number) ||
+ (lacpdu->actor_port_priority != port->partner_oper_port_priority) ||
+ MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->partner_oper_system)) ||
+ (lacpdu->actor_system_priority != port->partner_oper_system_priority) ||
+ (lacpdu->actor_key != port->partner_oper_key) ||
+ ((lacpdu->actor_state & AD_STATE_AGGREGATION) != (port->partner_oper_port_state & AD_STATE_AGGREGATION))
+ ) {
+ // update the state machine Selected variable
+ port->sm_vars &= ~AD_PORT_SELECTED;
+ }
+ }
+}
+
+/**
+ * __update_default_selected - update a port's Selected variable from Partner
+ * @port: the port we're looking at
+ *
+ * This function updates the value of the selected variable, using the partner
+ * administrative parameter values. The administrative values are compared with
+ * the corresponding operational parameter values for the partner. If one or
+ * more of the comparisons shows that the administrative value(s) differ from
+ * the current operational values, then Selected is set to FALSE and
+ * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
+ * Selected remains unchanged.
+ */
+static void __update_default_selected(struct port *port)
+{
+ // validate the port
+ if (port) {
+ // check if any parameter is different
+ if ((port->partner_admin_port_number != port->partner_oper_port_number) ||
+ (port->partner_admin_port_priority != port->partner_oper_port_priority) ||
+ MAC_ADDRESS_COMPARE(&(port->partner_admin_system), &(port->partner_oper_system)) ||
+ (port->partner_admin_system_priority != port->partner_oper_system_priority) ||
+ (port->partner_admin_key != port->partner_oper_key) ||
+ ((port->partner_admin_port_state & AD_STATE_AGGREGATION) != (port->partner_oper_port_state & AD_STATE_AGGREGATION))
+ ) {
+ // update the state machine Selected variable
+ port->sm_vars &= ~AD_PORT_SELECTED;
+ }
+ }
+}
+
+/**
+ * __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.
+ */
+static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
+{
+ // validate lacpdu and port
+ if (lacpdu && port) {
+ // check if all parameters are alike
+ if (((lacpdu->partner_port == port->actor_port_number) &&
+ (lacpdu->partner_port_priority == port->actor_port_priority) &&
+ !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) &&
+ (lacpdu->partner_system_priority == port->actor_system_priority) &&
+ (lacpdu->partner_key == port->actor_oper_port_key) &&
+ ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
+ // or this is individual link(aggregation == FALSE)
+ ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
+ ) {
+ // update the state machine Matched variable
+ port->sm_vars |= AD_PORT_MATCHED;
+ } else {
+ port->sm_vars &= ~AD_PORT_MATCHED;
+ }
+ }
+}
+
+/**
+ * __update_ntt - update a port's ntt variable from a received lacpdu
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * Updates the value of the ntt variable, using parameter values from a newly
+ * received lacpdu. The parameter values for the partner carried in the
+ * received PDU are compared with the corresponding operational parameter
+ * values for the Actor. If one or more of the comparisons shows that the
+ * value(s) received in the PDU differ from the current operational values,
+ * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
+ */
+static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
+{
+ // validate lacpdu and port
+ if (lacpdu && port) {
+ // check if any parameter is different
+ if ((lacpdu->partner_port != port->actor_port_number) ||
+ (lacpdu->partner_port_priority != port->actor_port_priority) ||
+ MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) ||
+ (lacpdu->partner_system_priority != port->actor_system_priority) ||
+ (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))
+ ) {
+ // set ntt to be TRUE
+ port->ntt = 1;
+ }
+ }
+}
+
+/**
+ * __attach_bond_to_agg
+ * @port: the port we're looking at
+ *
+ * Handle the attaching of the port's control parser/multiplexer and the
+ * aggregator. This function does nothing since the parser/multiplexer of the
+ * receive and the parser/multiplexer of the aggregator are already combined.
+ */
+static void __attach_bond_to_agg(struct port *port)
+{
+ port=NULL; // just to satisfy the compiler
+ // This function does nothing since the parser/multiplexer of the receive
+ // and the parser/multiplexer of the aggregator are already combined
+}
+
+/**
+ * __detach_bond_from_agg
+ * @port: the port we're looking at
+ *
+ * Handle the detaching of the port's control parser/multiplexer from the
+ * aggregator. This function does nothing since the parser/multiplexer of the
+ * receive and the parser/multiplexer of the aggregator are already combined.
+ */
+static void __detach_bond_from_agg(struct port *port)
+{
+ port=NULL; // just to satisfy the compiler
+ // This function does nothing sience the parser/multiplexer of the receive
+ // and the parser/multiplexer of the aggregator are already combined
+}
+
+/**
+ * __agg_ports_are_ready - check if all ports in an aggregator are ready
+ * @aggregator: the aggregator we're looking at
+ *
+ */
+static int __agg_ports_are_ready(struct aggregator *aggregator)
+{
+ struct port *port;
+ int retval = 1;
+
+ if (aggregator) {
+ // scan all ports in this aggregator to verfy if they are all ready
+ for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
+ if (!(port->sm_vars & AD_PORT_READY_N)) {
+ retval = 0;
+ break;
+ }
+ }
+ }
+
+ return retval;
+}
+
+/**
+ * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
+ * @aggregator: the aggregator we're looking at
+ * @val: Should the ports' ready bit be set on or off
+ *
+ */
+static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
+{
+ struct port *port;
+
+ for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
+ if (val) {
+ port->sm_vars |= AD_PORT_READY;
+ } else {
+ port->sm_vars &= ~AD_PORT_READY;
+ }
+ }
+}
+
+/**
+ * __get_agg_bandwidth - get the total bandwidth of an aggregator
+ * @aggregator: the aggregator we're looking at
+ *
+ */
+static u32 __get_agg_bandwidth(struct aggregator *aggregator)
+{
+ u32 bandwidth=0;
+ u32 basic_speed;
+
+ if (aggregator->num_of_ports) {
+ basic_speed = __get_link_speed(aggregator->lag_ports);
+ switch (basic_speed) {
+ case AD_LINK_SPEED_BITMASK_1MBPS:
+ bandwidth = aggregator->num_of_ports;
+ break;
+ case AD_LINK_SPEED_BITMASK_10MBPS:
+ bandwidth = aggregator->num_of_ports * 10;
+ break;
+ case AD_LINK_SPEED_BITMASK_100MBPS:
+ bandwidth = aggregator->num_of_ports * 100;
+ break;
+ case AD_LINK_SPEED_BITMASK_1000MBPS:
+ bandwidth = aggregator->num_of_ports * 1000;
+ break;
+ default:
+ bandwidth=0; // to silent the compilor ....
+ }
+ }
+ return bandwidth;
+}
+
+/**
+ * __get_active_agg - get the current active aggregator
+ * @aggregator: the aggregator we're looking at
+ *
+ */
+static struct aggregator *__get_active_agg(struct aggregator *aggregator)
+{
+ struct aggregator *retval = NULL;
+
+ for (; aggregator; aggregator = __get_next_agg(aggregator)) {
+ if (aggregator->is_active) {
+ retval = aggregator;
+ break;
+ }
+ }
+
+ return retval;
+}
+
+/**
+ * __update_lacpdu_from_port - update a port's lacpdu fields
+ * @port: the port we're looking at
+ *
+ */
+static inline void __update_lacpdu_from_port(struct port *port)
+{
+ struct lacpdu *lacpdu = &port->lacpdu;
+
+ /* 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 = port->actor_system_priority;
+ lacpdu->actor_system = port->actor_system;
+ lacpdu->actor_key = port->actor_oper_port_key;
+ lacpdu->actor_port_priority = port->actor_port_priority;
+ lacpdu->actor_port = port->actor_port_number;
+ lacpdu->actor_state = port->actor_oper_port_state;
+
+ /* lacpdu->reserved_3_1 initialized
+ * lacpdu->tlv_type_partner_info initialized
+ * lacpdu->partner_information_length initialized
+ */
+
+ lacpdu->partner_system_priority = port->partner_oper_system_priority;
+ lacpdu->partner_system = port->partner_oper_system;
+ lacpdu->partner_key = port->partner_oper_key;
+ lacpdu->partner_port_priority = port->partner_oper_port_priority;
+ lacpdu->partner_port = port->partner_oper_port_number;
+ lacpdu->partner_state = port->partner_oper_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
+ */
+
+ /* Convert all non u8 parameters to Big Endian for transmit */
+ __ntohs_lacpdu(lacpdu);
+}
+
+//////////////////////////////////////////////////////////////////////////////////////
+// ================= 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);
+ struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR;
+
+ skb = dev_alloc_skb(length);
+ if (!skb) {
+ return -ENOMEM;
+ }
+
+ skb->dev = slave->dev;
+ skb->mac.raw = skb->data;
+ skb->nh.raw = skb->data + ETH_HLEN;
+ skb->protocol = PKT_TYPE_LACPDU;
+ skb->priority = TC_PRIO_CONTROL;
+
+ lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
+
+ lacpdu_header->ad_header.destination_address = lacpdu_multicast_address;
+ /* Note: source addres is set to be the member's PERMANENT address, because we use it
+ to identify loopback lacpdus in receive. */
+ lacpdu_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr));
+ lacpdu_header->ad_header.length_type = PKT_TYPE_LACPDU;
+
+ lacpdu_header->lacpdu = port->lacpdu; // struct copy
+
+ dev_queue_xmit(skb);
+
+ return 0;
+}
+
+/**
+ * ad_marker_send - send marker information/response on a given port
+ * @port: the port we're looking at
+ * @marker: marker data to send
+ *
+ * Returns: 0 on success
+ * < 0 on error
+ */
+static int ad_marker_send(struct port *port, struct marker *marker)
+{
+ struct slave *slave = port->slave;
+ struct sk_buff *skb;
+ struct marker_header *marker_header;
+ int length = sizeof(struct marker_header);
+ struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR;
+
+ skb = dev_alloc_skb(length + 16);
+ if (!skb) {
+ return -ENOMEM;
+ }
+
+ skb_reserve(skb, 16);
+
+ skb->dev = slave->dev;
+ skb->mac.raw = skb->data;
+ skb->nh.raw = skb->data + ETH_HLEN;
+ skb->protocol = PKT_TYPE_LACPDU;
+
+ marker_header = (struct marker_header *)skb_put(skb, length);
+
+ marker_header->ad_header.destination_address = lacpdu_multicast_address;
+ /* Note: source addres is set to be the member's PERMANENT address, because we use it
+ to identify loopback MARKERs in receive. */
+ marker_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr));
+ marker_header->ad_header.length_type = PKT_TYPE_LACPDU;
+
+ marker_header->marker = *marker; // struct copy
+
+ dev_queue_xmit(skb);
+
+ return 0;
+}
+
+/**
+ * ad_mux_machine - handle a port's mux state machine
+ * @port: the port we're looking at
+ *
+ */
+static void ad_mux_machine(struct port *port)
+{
+ mux_states_t last_state;
+
+ // keep current State Machine state to compare later if it was changed
+ last_state = port->sm_mux_state;
+
+ if (port->sm_vars & AD_PORT_BEGIN) {
+ port->sm_mux_state = AD_MUX_DETACHED; // next state
+ } else {
+ switch (port->sm_mux_state) {
+ case AD_MUX_DETACHED:
+ if ((port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if SELECTED or STANDBY
+ port->sm_mux_state = AD_MUX_WAITING; // next state
+ }
+ break;
+ case AD_MUX_WAITING:
+ // if SELECTED == FALSE return to DETACH state
+ if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED
+ port->sm_vars &= ~AD_PORT_READY_N;
+ // in order to withhold the Selection Logic to check all ports READY_N value
+ // every callback cycle to update ready variable, we check READY_N and update READY here
+ __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
+ port->sm_mux_state = AD_MUX_DETACHED; // next state
+ break;
+ }
+
+ // check if the wait_while_timer expired
+ if (port->sm_mux_timer_counter && !(--port->sm_mux_timer_counter)) {
+ port->sm_vars |= AD_PORT_READY_N;
+ }
+
+ // in order to withhold the selection logic to check all ports READY_N value
+ // every callback cycle to update ready variable, we check READY_N and update READY here
+ __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
+
+ // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state
+ if ((port->sm_vars & AD_PORT_READY) && !port->sm_mux_timer_counter) {
+ port->sm_mux_state = AD_MUX_ATTACHED; // next state
+ }
+ break;
+ case AD_MUX_ATTACHED:
+ // check also if agg_select_timer expired(so the edable port will take place only after this timer)
+ if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper_port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) {
+ port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state
+ } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY
+ port->sm_vars &= ~AD_PORT_READY_N;
+ // in order to withhold the selection logic to check all ports READY_N value
+ // every callback cycle to update ready variable, we check READY_N and update READY here
+ __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
+ port->sm_mux_state = AD_MUX_DETACHED;// next state
+ }
+ break;
+ case AD_MUX_COLLECTING_DISTRIBUTING:
+ if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) ||
+ !(port->partner_oper_port_state & AD_STATE_SYNCHRONIZATION)
+ ) {
+ port->sm_mux_state = AD_MUX_ATTACHED;// next state
+
+ } else {
+ // if port state hasn't changed make
+ // sure that a collecting distributing
+ // port in an active aggregator is enabled
+ if (port->aggregator &&
+ port->aggregator->is_active &&
+ !__port_is_enabled(port)) {
+
+ __enable_port(port);
+ }
+ }
+ break;
+ default: //to silence the compiler
+ break;
+ }
+ }
+
+ // check if the state machine was changed
+ if (port->sm_mux_state != last_state) {
+ BOND_PRINT_DBG(("Mux Machine: Port=%d, Last State=%d, Curr State=%d", port->actor_port_number, last_state, port->sm_mux_state));
+ switch (port->sm_mux_state) {
+ case AD_MUX_DETACHED:
+ __detach_bond_from_agg(port);
+ port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
+ ad_disable_collecting_distributing(port);
+ port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
+ port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
+ port->ntt = 1;
+ break;
+ case AD_MUX_WAITING:
+ port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
+ break;
+ case AD_MUX_ATTACHED:
+ __attach_bond_to_agg(port);
+ port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
+ port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
+ port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
+ ad_disable_collecting_distributing(port);
+ port->ntt = 1;
+ break;
+ case AD_MUX_COLLECTING_DISTRIBUTING:
+ port->actor_oper_port_state |= AD_STATE_COLLECTING;
+ port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
+ ad_enable_collecting_distributing(port);
+ port->ntt = 1;
+ break;
+ default: //to silence the compiler
+ break;
+ }
+ }
+}
+
+/**
+ * ad_rx_machine - handle a port's rx State Machine
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * If lacpdu arrived, stop previous timer (if exists) and set the next state as
+ * CURRENT. If timer expired set the state machine in the proper state.
+ * In other cases, this function checks if we need to switch to other state.
+ */
+static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
+{
+ rx_states_t last_state;
+
+ // Lock to prevent 2 instances of this function to run simultaneously(rx interrupt and periodic machine callback)
+ __get_rx_machine_lock(port);
+
+ // 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; // next state
+ }
+ // 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; // next state
+ }
+ // check if new lacpdu arrived
+ else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) {
+ port->sm_rx_timer_counter = 0; // zero timer
+ port->sm_rx_state = AD_RX_CURRENT;
+ } else {
+ // if timer is on, and if it is expired
+ if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) {
+ switch (port->sm_rx_state) {
+ case AD_RX_EXPIRED:
+ port->sm_rx_state = AD_RX_DEFAULTED; // next state
+ break;
+ case AD_RX_CURRENT:
+ port->sm_rx_state = AD_RX_EXPIRED; // next state
+ break;
+ default: //to silence the compiler
+ break;
+ }
+ } else {
+ // if no lacpdu arrived and no timer is on
+ switch (port->sm_rx_state) {
+ case AD_RX_PORT_DISABLED:
+ if (port->sm_vars & AD_PORT_MOVED) {
+ port->sm_rx_state = AD_RX_INITIALIZE; // next state
+ } else if (port->is_enabled && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
+ port->sm_rx_state = AD_RX_EXPIRED; // next state
+ } else if (port->is_enabled && ((port->sm_vars & AD_PORT_LACP_ENABLED) == 0)) {
+ port->sm_rx_state = AD_RX_LACP_DISABLED; // next state
+ }
+ break;
+ default: //to silence the compiler
+ break;
+
+ }
+ }
+ }
+
+ // check if the State machine was changed or new lacpdu arrived
+ if ((port->sm_rx_state != last_state) || (lacpdu)) {
+ BOND_PRINT_DBG(("Rx Machine: Port=%d, Last State=%d, Curr State=%d", port->actor_port_number, last_state, port->sm_rx_state));
+ switch (port->sm_rx_state) {
+ case AD_RX_INITIALIZE:
+ if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) {
+ port->sm_vars &= ~AD_PORT_LACP_ENABLED;
+ } else {
+ port->sm_vars |= AD_PORT_LACP_ENABLED;
+ }
+ port->sm_vars &= ~AD_PORT_SELECTED;
+ __record_default(port);
+ port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
+ port->sm_vars &= ~AD_PORT_MOVED;
+ port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
+
+ /*- Fall Through -*/
+
+ case AD_RX_PORT_DISABLED:
+ port->sm_vars &= ~AD_PORT_MATCHED;
+ break;
+ case AD_RX_LACP_DISABLED:
+ port->sm_vars &= ~AD_PORT_SELECTED;
+ __record_default(port);
+ port->partner_oper_port_state &= ~AD_STATE_AGGREGATION;
+ port->sm_vars |= AD_PORT_MATCHED;
+ port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
+ break;
+ case AD_RX_EXPIRED:
+ //Reset of the Synchronization flag. (Standard 43.4.12)
+ //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the
+ //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port.
+ port->partner_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
+ port->sm_vars &= ~AD_PORT_MATCHED;
+ port->partner_oper_port_state |= AD_SHORT_TIMEOUT;
+ port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
+ port->actor_oper_port_state |= AD_STATE_EXPIRED;
+ break;
+ case AD_RX_DEFAULTED:
+ __update_default_selected(port);
+ __record_default(port);
+ port->sm_vars |= AD_PORT_MATCHED;
+ port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
+ break;
+ case AD_RX_CURRENT:
+ // detect loopback situation
+ if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) {
+ // INFO_RECEIVED_LOOPBACK_FRAMES
+ printk(KERN_ERR "bonding: An illegal loopback occurred on adapter (%s)\n",
+ port->slave->dev->name);
+ printk(KERN_ERR "Check the configuration to verify that all Adapters "
+ "are connected to 802.3ad compliant switch ports\n");
+ __release_rx_machine_lock(port);
+ return;
+ }
+ __update_selected(lacpdu, port);
+ __update_ntt(lacpdu, port);
+ __record_pdu(lacpdu, port);
+ __choose_matched(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;
+ // verify that if the aggregator is enabled, the port is enabled too.
+ //(because if the link goes down for a short time, the 802.3ad will not
+ // catch it, and the port will continue to be disabled)
+ if (port->aggregator && port->aggregator->is_active && !__port_is_enabled(port)) {
+ __enable_port(port);
+ }
+ break;
+ default: //to silence the compiler
+ break;
+ }
+ }
+ __release_rx_machine_lock(port);
+}
+
+/**
+ * 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);
+ // send the lacpdu
+ if (ad_lacpdu_send(port) >= 0) {
+ BOND_PRINT_DBG(("Sent LACPDU on port %d", port->actor_port_number));
+ // mark ntt as false, so it will not be sent again until demanded
+ port->ntt = 0;
+ }
+ }
+ // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
+ port->sm_tx_timer_counter=ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
+ }
+}
+
+/**
+ * ad_periodic_machine - handle a port's periodic state machine
+ * @port: the port we're looking at
+ *
+ * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
+ */
+static void ad_periodic_machine(struct port *port)
+{
+ periodic_states_t last_state;
+
+ // keep current state machine state to compare later if it was changed
+ last_state = port->sm_periodic_state;
+
+ // check if port was reinitialized
+ if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
+ (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper_port_state & AD_STATE_LACP_ACTIVITY))
+ ) {
+ port->sm_periodic_state = AD_NO_PERIODIC; // next state
+ }
+ // check if state machine should change state
+ else if (port->sm_periodic_timer_counter) {
+ // check if periodic state machine expired
+ if (!(--port->sm_periodic_timer_counter)) {
+ // if expired then do tx
+ port->sm_periodic_state = AD_PERIODIC_TX; // next state
+ } else {
+ // If not expired, check if there is some new timeout parameter from the partner state
+ switch (port->sm_periodic_state) {
+ case AD_FAST_PERIODIC:
+ if (!(port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) {
+ port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
+ }
+ break;
+ case AD_SLOW_PERIODIC:
+ if ((port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) {
+ // stop current timer
+ port->sm_periodic_timer_counter = 0;
+ port->sm_periodic_state = AD_PERIODIC_TX; // next state
+ }
+ break;
+ default: //to silence the compiler
+ break;
+ }
+ }
+ } else {
+ switch (port->sm_periodic_state) {
+ case AD_NO_PERIODIC:
+ port->sm_periodic_state = AD_FAST_PERIODIC; // next state
+ break;
+ case AD_PERIODIC_TX:
+ if (!(port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) {
+ port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
+ } else {
+ port->sm_periodic_state = AD_FAST_PERIODIC; // next state
+ }
+ break;
+ default: //to silence the compiler
+ break;
+ }
+ }
+
+ // check if the state machine was changed
+ if (port->sm_periodic_state != last_state) {
+ BOND_PRINT_DBG(("Periodic Machine: Port=%d, Last State=%d, Curr State=%d", port->actor_port_number, last_state, port->sm_periodic_state));
+ switch (port->sm_periodic_state) {
+ case AD_NO_PERIODIC:
+ port->sm_periodic_timer_counter = 0; // zero timer
+ break;
+ case AD_FAST_PERIODIC:
+ port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
+ break;
+ case AD_SLOW_PERIODIC:
+ port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
+ break;
+ case AD_PERIODIC_TX:
+ port->ntt = 1;
+ break;
+ default: //to silence the compiler
+ break;
+ }
+ }
+}
+
+/**
+ * ad_port_selection_logic - select aggregation groups
+ * @port: the port we're looking at
+ *
+ * Select aggregation groups, and assign each port for it's aggregetor. The
+ * selection logic is called in the inititalization (after all the handshkes),
+ * and after every lacpdu receive (if selected is off).
+ */
+static void ad_port_selection_logic(struct port *port)
+{
+ struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
+ struct port *last_port = NULL, *curr_port;
+ int found = 0;
+
+ // if the port is already Selected, do nothing
+ if (port->sm_vars & AD_PORT_SELECTED) {
+ return;
+ }
+
+ // if the port is connected to other aggregator, detach it
+ if (port->aggregator) {
+ // detach the port from its former aggregator
+ temp_aggregator=port->aggregator;
+ for (curr_port=temp_aggregator->lag_ports; curr_port; last_port=curr_port, curr_port=curr_port->next_port_in_aggregator) {
+ if (curr_port == port) {
+ temp_aggregator->num_of_ports--;
+ if (!last_port) {// if it is the first port attached to the aggregator
+ temp_aggregator->lag_ports=port->next_port_in_aggregator;
+ } else {// not the first port attached to the aggregator
+ last_port->next_port_in_aggregator=port->next_port_in_aggregator;
+ }
+
+ // clear the port's relations to this aggregator
+ port->aggregator = NULL;
+ port->next_port_in_aggregator=NULL;
+ port->actor_port_aggregator_identifier=0;
+
+ BOND_PRINT_DBG(("Port %d left LAG %d", 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
+ printk(KERN_WARNING "bonding: Warning: Port %d (on %s) was "
+ "related to aggregator %d but was not on its port list\n",
+ port->actor_port_number, port->slave->dev->name,
+ port->aggregator->aggregator_identifier);
+ }
+ }
+ // search on all aggregators for a suitable aggregator for this port
+ for (aggregator = __get_first_agg(port); aggregator;
+ aggregator = __get_next_agg(aggregator)) {
+
+ // keep a free aggregator for later use(if needed)
+ if (!aggregator->lag_ports) {
+ if (!free_aggregator) {
+ free_aggregator=aggregator;
+ }
+ continue;
+ }
+ // check if current aggregator suits us
+ if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND
+ !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper_system)) &&
+ (aggregator->partner_system_priority == port->partner_oper_system_priority) &&
+ (aggregator->partner_oper_aggregator_key == port->partner_oper_key)
+ ) &&
+ ((MAC_ADDRESS_COMPARE(&(port->partner_oper_system), &(null_mac_addr)) && // partner answers
+ !aggregator->is_individual) // but is not individual OR
+ )
+ ) {
+ // attach to the founded aggregator
+ port->aggregator = aggregator;
+ port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier;
+ port->next_port_in_aggregator=aggregator->lag_ports;
+ port->aggregator->num_of_ports++;
+ aggregator->lag_ports=port;
+ BOND_PRINT_DBG(("Port %d joined LAG %d(existing LAG)", port->actor_port_number, port->aggregator->aggregator_identifier));
+
+ // mark this port as selected
+ port->sm_vars |= AD_PORT_SELECTED;
+ found = 1;
+ break;
+ }
+ }
+
+ // the port couldn't find an aggregator - attach it to a new aggregator
+ if (!found) {
+ if (free_aggregator) {
+ // assign port a new aggregator
+ port->aggregator = free_aggregator;
+ port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier;
+
+ // update the new aggregator's parameters
+ // if port was responsed from the end-user
+ if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) {// if port is full duplex
+ port->aggregator->is_individual = 0;
+ } else {
+ port->aggregator->is_individual = 1;
+ }
+
+ 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;
+
+ BOND_PRINT_DBG(("Port %d joined LAG %d(new LAG)", port->actor_port_number, port->aggregator->aggregator_identifier));
+ } else {
+ printk(KERN_ERR "bonding: 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));
+
+ if (!__check_agg_selection_timer(port) && (aggregator = __get_first_agg(port))) {
+ ad_agg_selection_logic(aggregator);
+ }
+}
+
+/**
+ * ad_agg_selection_logic - select an aggregation group for a team
+ * @aggregator: the aggregator we're looking at
+ *
+ * It is assumed that only one aggregator may be selected for a team.
+ * The logic of this function is to select (at first time) 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.
+ *
+ * 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 *aggregator)
+{
+ struct aggregator *best_aggregator = NULL, *active_aggregator = NULL;
+ struct aggregator *last_active_aggregator = NULL, *origin_aggregator;
+ struct port *port;
+ u16 num_of_aggs=0;
+
+ origin_aggregator = aggregator;
+
+ //get current active aggregator
+ last_active_aggregator = __get_active_agg(aggregator);
+
+ // search for the aggregator with the most ports attached to it.
+ do {
+ // count how many candidate lag's we have
+ if (aggregator->lag_ports) {
+ num_of_aggs++;
+ }
+ if (aggregator->is_active && !aggregator->is_individual && // if current aggregator is the active aggregator
+ MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr))) { // and partner answers to 802.3ad PDUs
+ if (aggregator->num_of_ports) { // if any ports attached to the current aggregator
+ best_aggregator=NULL; // disregard the best aggregator that was chosen by now
+ break; // stop the selection of other aggregator if there are any ports attached to this active aggregator
+ } else { // no ports attached to this active aggregator
+ aggregator->is_active = 0; // mark this aggregator as not active anymore
+ }
+ }
+ if (aggregator->num_of_ports) { // if any ports attached
+ if (best_aggregator) { // if there is a candidte aggregator
+ //The reasons for choosing new best aggregator:
+ // 1. if current agg is NOT individual and the best agg chosen so far is individual OR
+ // current and best aggs are both individual or both not individual, AND
+ // 2a. current agg partner reply but best agg partner do not reply OR
+ // 2b. current agg partner reply OR current agg partner do not reply AND best agg partner also do not reply AND
+ // current has more ports/bandwidth, or same amount of ports but current has faster ports, THEN
+ // current agg become best agg so far
+
+ //if current agg is NOT individual and the best agg chosen so far is individual change best_aggregator
+ if (!aggregator->is_individual && best_aggregator->is_individual) {
+ best_aggregator=aggregator;
+ }
+ // current and best aggs are both individual or both not individual
+ else if ((aggregator->is_individual && best_aggregator->is_individual) ||
+ (!aggregator->is_individual && !best_aggregator->is_individual)) {
+ // current and best aggs are both individual or both not individual AND
+ // current agg partner reply but best agg partner do not reply
+ if ((MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr)) &&
+ !MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr)))) {
+ best_aggregator=aggregator;
+ }
+ // current agg partner reply OR current agg partner do not reply AND best agg partner also do not reply
+ else if (! (!MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr)) &&
+ MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr)))) {
+ if ((__get_agg_selection_mode(aggregator->lag_ports) == AD_BANDWIDTH)&&
+ (__get_agg_bandwidth(aggregator) > __get_agg_bandwidth(best_aggregator))) {
+ best_aggregator=aggregator;
+ } else if (__get_agg_selection_mode(aggregator->lag_ports) == AD_COUNT) {
+ if (((aggregator->num_of_ports > best_aggregator->num_of_ports) &&
+ (aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS))||
+ ((aggregator->num_of_ports == best_aggregator->num_of_ports) &&
+ ((u16)(aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS) >
+ (u16)(best_aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS)))) {
+ best_aggregator=aggregator;
+ }
+ }
+ }
+ }
+ } else {
+ best_aggregator=aggregator;
+ }
+ }
+ aggregator->is_active = 0; // mark all aggregators as not active anymore
+ } while ((aggregator = __get_next_agg(aggregator)));
+
+ // if we have new aggregator selected, don't replace the old aggregator if it has an answering partner,
+ // or if both old aggregator and new aggregator don't have answering partner
+ if (best_aggregator) {
+ if (last_active_aggregator && last_active_aggregator->lag_ports && last_active_aggregator->lag_ports->is_enabled &&
+ (MAC_ADDRESS_COMPARE(&(last_active_aggregator->partner_system), &(null_mac_addr)) || // partner answers OR
+ (!MAC_ADDRESS_COMPARE(&(last_active_aggregator->partner_system), &(null_mac_addr)) && // both old and new
+ !MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr)))) // partner do not answer
+ ) {
+ // if new aggregator has link, and old aggregator does not, replace old aggregator.(do nothing)
+ // -> don't replace otherwise.
+ if (!(!last_active_aggregator->actor_oper_aggregator_key && best_aggregator->actor_oper_aggregator_key)) {
+ best_aggregator=NULL;
+ last_active_aggregator->is_active = 1; // don't replace good old aggregator
+
+ }
+ }
+ }
+
+ // if there is new best aggregator, activate it
+ if (best_aggregator) {
+ for (aggregator = __get_first_agg(best_aggregator->lag_ports);
+ aggregator;
+ aggregator = __get_next_agg(aggregator)) {
+
+ BOND_PRINT_DBG(("Agg=%d; Ports=%d; a key=%d; p key=%d; Indiv=%d; Active=%d",
+ aggregator->aggregator_identifier, aggregator->num_of_ports,
+ aggregator->actor_oper_aggregator_key, aggregator->partner_oper_aggregator_key,
+ aggregator->is_individual, aggregator->is_active));
+ }
+
+ // check if any partner replys
+ if (best_aggregator->is_individual) {
+ printk(KERN_WARNING "bonding: Warning: No 802.3ad response from the link partner "
+ "for any adapters in the bond\n");
+ }
+
+ // check if there are more than one aggregator
+ if (num_of_aggs > 1) {
+ BOND_PRINT_DBG(("Warning: More than one Link Aggregation Group was "
+ "found in the bond. Only one group will function in the bond"));
+ }
+
+ best_aggregator->is_active = 1;
+ BOND_PRINT_DBG(("LAG %d choosed as the active LAG", best_aggregator->aggregator_identifier));
+ BOND_PRINT_DBG(("Agg=%d; Ports=%d; a key=%d; p key=%d; Indiv=%d; Active=%d",
+ best_aggregator->aggregator_identifier, best_aggregator->num_of_ports,
+ best_aggregator->actor_oper_aggregator_key, best_aggregator->partner_oper_aggregator_key,
+ best_aggregator->is_individual, best_aggregator->is_active));
+
+ // disable the ports that were related to the former active_aggregator
+ if (last_active_aggregator) {
+ for (port=last_active_aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
+ __disable_port(port);
+ }
+ }
+ }
+
+ // if the selected aggregator is of join individuals(partner_system is NULL), enable their ports
+ active_aggregator = __get_active_agg(origin_aggregator);
+
+ if (active_aggregator) {
+ if (!MAC_ADDRESS_COMPARE(&(active_aggregator->partner_system), &(null_mac_addr))) {
+ for (port=active_aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
+ __enable_port(port);
+ }
+ }
+ }
+}
+
+/**
+ * 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 = 0;
+ 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;
+ BOND_PRINT_DBG(("LAG %d was cleared", 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)
+{
+ if (port) {
+ port->actor_port_number = 1;
+ port->actor_port_priority = 0xff;
+ port->actor_system = null_mac_addr;
+ port->actor_system_priority = 0xffff;
+ port->actor_port_aggregator_identifier = 0;
+ port->ntt = 0;
+ port->actor_admin_port_key = 1;
+ port->actor_oper_port_key = 1;
+ port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
+ port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
+
+ if (lacp_fast) {
+ port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
+ }
+
+ port->partner_admin_system = null_mac_addr;
+ port->partner_oper_system = null_mac_addr;
+ port->partner_admin_system_priority = 0xffff;
+ port->partner_oper_system_priority = 0xffff;
+ port->partner_admin_key = 1;
+ port->partner_oper_key = 1;
+ port->partner_admin_port_number = 1;
+ port->partner_oper_port_number = 1;
+ port->partner_admin_port_priority = 0xff;
+ port->partner_oper_port_priority = 0xff;
+ port->partner_admin_port_state = 1;
+ port->partner_oper_port_state = 1;
+ port->is_enabled = 1;
+ // ****** private parameters ******
+ port->sm_vars = 0x3;
+ port->sm_rx_state = 0;
+ port->sm_rx_timer_counter = 0;
+ port->sm_periodic_state = 0;
+ port->sm_periodic_timer_counter = 0;
+ port->sm_mux_state = 0;
+ port->sm_mux_timer_counter = 0;
+ port->sm_tx_state = 0;
+ port->sm_tx_timer_counter = 0;
+ port->slave = NULL;
+ port->aggregator = NULL;
+ port->next_port_in_aggregator = NULL;
+ port->transaction_id = 0;
+
+ ad_initialize_lacpdu(&(port->lacpdu));
+ }
+}
+
+/**
+ * ad_enable_collecting_distributing - enable a port's transmit/receive
+ * @port: the port we're looking at
+ *
+ * Enable @port if it's in an active aggregator
+ */
+static void ad_enable_collecting_distributing(struct port *port)
+{
+ if (port->aggregator->is_active) {
+ BOND_PRINT_DBG(("Enabling port %d(LAG %d)", port->actor_port_number, port->aggregator->aggregator_identifier));
+ __enable_port(port);
+ }
+}
+
+/**
+ * ad_disable_collecting_distributing - disable a port's transmit/receive
+ * @port: the port we're looking at
+ *
+ */
+static void ad_disable_collecting_distributing(struct port *port)
+{
+ if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) {
+ BOND_PRINT_DBG(("Disabling port %d(LAG %d)", port->actor_port_number, port->aggregator->aggregator_identifier));
+ __disable_port(port);
+ }
+}
+
+#if 0
+/**
+ * ad_marker_info_send - send a marker information frame
+ * @port: the port we're looking at
+ *
+ * This function does nothing since we decided not to implement send and handle
+ * response for marker PDU's, in this stage, but only to respond to marker
+ * information.
+ */
+static void ad_marker_info_send(struct port *port)
+{
+ struct marker marker;
+ u16 index;
+
+ // fill the marker PDU with the appropriate values
+ marker.subtype = 0x02;
+ marker.version_number = 0x01;
+ marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE;
+ marker.marker_length = 0x16;
+ // convert requester_port to Big Endian
+ marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8));
+ marker.requester_system = port->actor_system;
+ // convert requester_port(u32) to Big Endian
+ marker.requester_transaction_id = (((++port->transaction_id & 0xFF) << 24) |((port->transaction_id & 0xFF00) << 8) |((port->transaction_id & 0xFF0000) >> 8) |((port->transaction_id & 0xFF000000) >> 24));
+ marker.pad = 0;
+ marker.tlv_type_terminator = 0x00;
+ marker.terminator_length = 0x00;
+ for (index=0; index<90; index++) {
+ marker.reserved_90[index]=0;
+ }
+
+ // send the marker information
+ if (ad_marker_send(port, &marker) >= 0) {
+ BOND_PRINT_DBG(("Sent Marker Information on port %d", port->actor_port_number));
+ }
+}
+#endif
+
+/**
+ * ad_marker_info_received - handle receive of a Marker information frame
+ * @marker_info: Marker info received
+ * @port: the port we're looking at
+ *
+ */
+static void ad_marker_info_received(struct marker *marker_info,struct port *port)
+{
+ struct marker marker;
+
+ // copy the received marker data to the response marker
+ //marker = *marker_info;
+ memcpy(&marker, marker_info, sizeof(struct 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) {
+ BOND_PRINT_DBG(("Sent Marker Response on port %d", 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 marker *marker, struct port *port)
+{
+ marker=NULL; // just to satisfy the compiler
+ port=NULL; // just to satisfy the compiler
+ // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
+}
+
+/**
+ * ad_initialize_lacpdu - initialize a given lacpdu structure
+ * @lacpdu: lacpdu structure to initialize
+ *
+ */
+static void ad_initialize_lacpdu(struct lacpdu *lacpdu)
+{
+ u16 index;
+
+ // initialize lacpdu data
+ lacpdu->subtype = 0x01;
+ lacpdu->version_number = 0x01;
+ lacpdu->tlv_type_actor_info = 0x01;
+ lacpdu->actor_information_length = 0x14;
+ // lacpdu->actor_system_priority updated on send
+ // lacpdu->actor_system updated on send
+ // lacpdu->actor_key updated on send
+ // lacpdu->actor_port_priority updated on send
+ // lacpdu->actor_port updated on send
+ // lacpdu->actor_state updated on send
+ lacpdu->tlv_type_partner_info = 0x02;
+ lacpdu->partner_information_length = 0x14;
+ for (index=0; index<=2; index++) {
+ lacpdu->reserved_3_1[index]=0;
+ }
+ // lacpdu->partner_system_priority updated on send
+ // lacpdu->partner_system updated on send
+ // lacpdu->partner_key updated on send
+ // lacpdu->partner_port_priority updated on send
+ // lacpdu->partner_port updated on send
+ // lacpdu->partner_state updated on send
+ for (index=0; index<=2; index++) {
+ lacpdu->reserved_3_2[index]=0;
+ }
+ lacpdu->tlv_type_collector_info = 0x03;
+ lacpdu->collector_information_length= 0x10;
+ lacpdu->collector_max_delay = AD_COLLECTOR_MAX_DELAY;
+ for (index=0; index<=11; index++) {
+ lacpdu->reserved_12[index]=0;
+ }
+ lacpdu->tlv_type_terminator = 0x00;
+ lacpdu->terminator_length = 0;
+ for (index=0; index<=49; index++) {
+ lacpdu->reserved_50[index]=0;
+ }
+}
+
+//////////////////////////////////////////////////////////////////////////////////////
+// ================= AD exported functions to the main bonding code ==================
+//////////////////////////////////////////////////////////////////////////////////////
+
+// Check aggregators status in team every T seconds
+#define AD_AGGREGATOR_SELECTION_TIMER 8
+
+static u16 aggregator_identifier;
+
+/**
+ * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
+ * @bond: bonding struct to work on
+ * @tick_resolution: tick duration (millisecond resolution)
+ * @lacp_fast: boolean. whether fast periodic should be used
+ *
+ * Can be called only after the mac address of the bond is set.
+ */
+void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast)
+{
+ // check that the bond is not initialized yet
+ if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), &(bond->device->dev_addr))) {
+
+ aggregator_identifier = 0;
+
+ BOND_AD_INFO(bond).lacp_fast = lacp_fast;
+ BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
+ BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->device->dev_addr);
+
+ // initialize how many times this module is called in one second(should be about every 100ms)
+ ad_ticks_per_sec = tick_resolution;
+
+ // initialize the aggregator selection timer(to activate an aggregation selection after initialize)
+ BOND_AD_INFO(bond).agg_select_timer = (AD_AGGREGATOR_SELECTION_TIMER * ad_ticks_per_sec);
+ BOND_AD_INFO(bond).agg_select_mode = AD_BANDWIDTH;
+ }
+}
+
+/**
+ * bond_3ad_bind_slave - initialize a slave's port
+ * @slave: slave struct to work on
+ *
+ * Returns: 0 on success
+ * < 0 on error
+ */
+int bond_3ad_bind_slave(struct slave *slave)
+{
+ struct bonding *bond = bond_get_bond_by_slave(slave);
+ struct port *port;
+ struct aggregator *aggregator;
+
+ if (bond == NULL) {
+ printk(KERN_CRIT "The slave %s is not attached to its bond\n", slave->dev->name);
+ return -1;
+ }
+
+ //check that the slave has not been intialized yet.
+ if (SLAVE_AD_INFO(slave).port.slave != slave) {
+
+ // port initialization
+ port = &(SLAVE_AD_INFO(slave).port);
+
+ ad_initialize_port(port, BOND_AD_INFO(bond).lacp_fast);
+
+ port->slave = slave;
+ port->actor_port_number = SLAVE_AD_INFO(slave).id;
+ // key is determined according to the link speed, duplex and user key(which is yet not supported)
+ // ------------------------------------------------------------
+ // Port key : | User key | Speed |Duplex|
+ // ------------------------------------------------------------
+ // 16 6 1 0
+ port->actor_admin_port_key = 0; // initialize this parameter
+ port->actor_admin_port_key |= __get_duplex(port);
+ port->actor_admin_port_key |= (__get_link_speed(port) << 1);
+ port->actor_oper_port_key = port->actor_admin_port_key;
+ // if the port is not full duplex, then the port should be not lacp Enabled
+ if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) {
+ port->sm_vars &= ~AD_PORT_LACP_ENABLED;
+ }
+ // actor system is the bond's system
+ port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
+ // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
+ port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
+ port->aggregator = NULL;
+ port->next_port_in_aggregator = NULL;
+
+ __disable_port(port);
+ __initialize_port_locks(port);
+
+
+ // aggregator initialization
+ aggregator = &(SLAVE_AD_INFO(slave).aggregator);
+
+ ad_initialize_agg(aggregator);
+
+ aggregator->aggregator_mac_address = *((struct mac_addr *)bond->device->dev_addr);
+ aggregator->aggregator_identifier = (++aggregator_identifier);
+ aggregator->slave = slave;
+ aggregator->is_active = 0;
+ aggregator->num_of_ports = 0;
+ }
+
+ return 0;
+}
+
+/**
+ * bond_3ad_unbind_slave - deinitialize a slave's port
+ * @slave: slave struct to work on
+ *
+ * Search for the aggregator that is related to this port, remove the
+ * aggregator and assign another aggregator for other port related to it
+ * (if any), and remove the port.
+ */
+void bond_3ad_unbind_slave(struct slave *slave)
+{
+ struct port *port, *prev_port, *temp_port;
+ struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
+ int select_new_active_agg = 0;
+
+ // find the aggregator related to this slave
+ aggregator = &(SLAVE_AD_INFO(slave).aggregator);
+
+ // find the port related to this slave
+ port = &(SLAVE_AD_INFO(slave).port);
+
+ // if slave is null, the whole port is not initialized
+ if (!port->slave) {
+ printk(KERN_WARNING "bonding: Trying to unbind an uninitialized port on %s\n", slave->dev->name);
+ return;
+ }
+
+ BOND_PRINT_DBG(("Unbinding Link Aggregation Group %d", aggregator->aggregator_identifier));
+
+ /* Tell the partner that this port is not suitable for aggregation */
+ port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
+ __update_lacpdu_from_port(port);
+ ad_lacpdu_send(port);
+
+ // check if this aggregator is occupied
+ if (aggregator->lag_ports) {
+ // check if there are other ports related to this aggregator except
+ // the port related to this slave(thats ensure us that there is a
+ // reason to search for new aggregator, and that we will find one
+ if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) {
+ // find new aggregator for the related port(s)
+ new_aggregator = __get_first_agg(port);
+ for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) {
+ // if the new aggregator is empty, or it connected to to our port only
+ if (!new_aggregator->lag_ports || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator)) {
+ break;
+ }
+ }
+ // if new aggregator found, copy the aggregator's parameters
+ // and connect the related lag_ports to the new aggregator
+ if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
+ BOND_PRINT_DBG(("Some port(s) related to LAG %d - replaceing with LAG %d", aggregator->aggregator_identifier, new_aggregator->aggregator_identifier));
+
+ if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) {
+ printk(KERN_INFO "bonding: Removing an active aggregator\n");
+ // select new active aggregator
+ select_new_active_agg = 1;
+ }
+
+ new_aggregator->is_individual = aggregator->is_individual;
+ new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
+ new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
+ new_aggregator->partner_system = aggregator->partner_system;
+ new_aggregator->partner_system_priority = aggregator->partner_system_priority;
+ new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
+ new_aggregator->receive_state = aggregator->receive_state;
+ new_aggregator->transmit_state = aggregator->transmit_state;
+ new_aggregator->lag_ports = aggregator->lag_ports;
+ new_aggregator->is_active = aggregator->is_active;
+ new_aggregator->num_of_ports = aggregator->num_of_ports;
+
+ // update the information that is written on the ports about the aggregator
+ for (temp_port=aggregator->lag_ports; temp_port; temp_port=temp_port->next_port_in_aggregator) {
+ temp_port->aggregator=new_aggregator;
+ temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
+ }
+
+ // clear the aggregator
+ ad_clear_agg(aggregator);
+
+ if (select_new_active_agg) {
+ ad_agg_selection_logic(__get_first_agg(port));
+ }
+ } else {
+ printk(KERN_WARNING "bonding: Warning: 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;
+ // clear the aggregator
+ ad_clear_agg(aggregator);
+ if (select_new_active_agg) {
+ printk(KERN_INFO "Removing an active aggregator\n");
+ // select new active aggregator
+ ad_agg_selection_logic(__get_first_agg(port));
+ }
+ }
+ }
+
+ BOND_PRINT_DBG(("Unbinding port %d", port->actor_port_number));
+ // find the aggregator that this port is connected to
+ temp_aggregator = __get_first_agg(port);
+ for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) {
+ prev_port = NULL;
+ // search the port in the aggregator's related ports
+ for (temp_port=temp_aggregator->lag_ports; temp_port; prev_port=temp_port, temp_port=temp_port->next_port_in_aggregator) {
+ if (temp_port == port) { // the aggregator found - detach the port from this aggregator
+ if (prev_port) {
+ prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
+ } else {
+ temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
+ }
+ temp_aggregator->num_of_ports--;
+ if (temp_aggregator->num_of_ports==0) {
+ select_new_active_agg = temp_aggregator->is_active;
+ // clear the aggregator
+ ad_clear_agg(temp_aggregator);
+ if (select_new_active_agg) {
+ printk(KERN_INFO "Removing an active aggregator\n");
+ // select new active aggregator
+ ad_agg_selection_logic(__get_first_agg(port));
+ }
+ }
+ break;
+ }
+ }
+ }
+ port->slave=NULL;
+}
+
+/**
+ * bond_3ad_state_machine_handler - handle state machines timeout
+ * @bond: bonding struct to work on
+ *
+ * The state machine handling concept in this module is to check every tick
+ * which state machine should operate any function. The execution order is
+ * round robin, so when we have an interaction between state machines, the
+ * reply of one to each other might be delayed until next tick.
+ *
+ * This function also complete the initialization when the agg_select_timer
+ * times out, and it selects an aggregator for the ports that are yet not
+ * related to any aggregator, and selects the active aggregator for a bond.
+ */
+void bond_3ad_state_machine_handler(struct bonding *bond)
+{
+ struct port *port;
+ struct aggregator *aggregator;
+
+ read_lock(&bond->lock);
+
+ //check if there are any slaves
+ if (bond->next == (struct slave *)bond) {
+ goto end;
+ }
+
+ if ((bond->device->flags & IFF_UP) != IFF_UP) {
+ goto end;
+ }
+
+ // check if agg_select_timer timer after initialize is timed out
+ if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) {
+ // select the active aggregator for the bond
+ if ((port = __get_first_port(bond))) {
+ if (!port->slave) {
+ printk(KERN_WARNING "bonding: Warning: bond's first port is uninitialized\n");
+ goto end;
+ }
+
+ aggregator = __get_first_agg(port);
+ ad_agg_selection_logic(aggregator);
+ }
+ }
+
+ // for each port run the state machines
+ for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
+ if (!port->slave) {
+ printk(KERN_WARNING "bonding: Warning: Found an uninitialized port\n");
+ goto end;
+ }
+
+ ad_rx_machine(NULL, port);
+ ad_periodic_machine(port);
+ ad_port_selection_logic(port);
+ ad_mux_machine(port);
+ ad_tx_machine(port);
+
+ // turn off the BEGIN bit, since we already handled it
+ if (port->sm_vars & AD_PORT_BEGIN) {
+ port->sm_vars &= ~AD_PORT_BEGIN;
+ }
+ }
+
+end:
+ read_unlock(&bond->lock);
+
+
+ if ((bond->device->flags & IFF_UP) == IFF_UP) {
+ /* re-arm the timer */
+ mod_timer(&(BOND_AD_INFO(bond).ad_timer), jiffies + (AD_TIMER_INTERVAL * HZ / 1000));
+ }
+}
+
+/**
+ * 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.
+ */
+void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length)
+{
+ struct port *port;
+
+ if (length >= sizeof(struct lacpdu)) {
+
+ port = &(SLAVE_AD_INFO(slave).port);
+
+ if (!port->slave) {
+ printk(KERN_WARNING "bonding: Warning: port of slave %s is uninitialized\n", slave->dev->name);
+ return;
+ }
+
+ switch (lacpdu->subtype) {
+ case AD_TYPE_LACPDU:
+ __ntohs_lacpdu(lacpdu);
+ BOND_PRINT_DBG(("Received LACPDU on port %d", port->actor_port_number));
+ ad_rx_machine(lacpdu, port);
+ break;
+
+ case AD_TYPE_MARKER:
+ // No need to convert fields to Little Endian since we don't use the marker's fields.
+
+ switch (((struct marker *)lacpdu)->tlv_type) {
+ case AD_MARKER_INFORMATION_SUBTYPE:
+ BOND_PRINT_DBG(("Received Marker Information on port %d", port->actor_port_number));
+ ad_marker_info_received((struct marker *)lacpdu, port);
+ break;
+
+ case AD_MARKER_RESPONSE_SUBTYPE:
+ BOND_PRINT_DBG(("Received Marker Response on port %d", port->actor_port_number));
+ ad_marker_response_received((struct marker *)lacpdu, port);
+ break;
+
+ default:
+ BOND_PRINT_DBG(("Received an unknown Marker subtype on slot %d", port->actor_port_number));
+ }
+ }
+ }
+}
+
+/**
+ * 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) {
+ printk(KERN_WARNING "bonding: Warning: speed changed for uninitialized port on %s\n",
+ slave->dev->name);
+ return;
+ }
+
+ port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
+ port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1);
+ BOND_PRINT_DBG(("Port %d changed speed", port->actor_port_number));
+ // there is no need to reselect a new aggregator, just signal the
+ // state machines to reinitialize
+ port->sm_vars |= AD_PORT_BEGIN;
+}
+
+/**
+ * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
+ * @slave: slave struct to work on
+ *
+ * Handle reselection of aggregator (if needed) for this port.
+ */
+void bond_3ad_adapter_duplex_changed(struct slave *slave)
+{
+ struct port *port;
+
+ port=&(SLAVE_AD_INFO(slave).port);
+
+ // if slave is null, the whole port is not initialized
+ if (!port->slave) {
+ printk(KERN_WARNING "bonding: Warning: duplex changed for uninitialized port on %s\n",
+ slave->dev->name);
+ return;
+ }
+
+ port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
+ port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port);
+ BOND_PRINT_DBG(("Port %d changed duplex", port->actor_port_number));
+ // there is no need to reselect a new aggregator, just signal the
+ // state machines to reinitialize
+ port->sm_vars |= AD_PORT_BEGIN;
+}
+
+/**
+ * bond_3ad_handle_link_change - handle a slave's link status change indication
+ * @slave: slave struct to work on
+ * @status: whether the link is now up or down
+ *
+ * Handle reselection of aggregator (if needed) for this port.
+ */
+void bond_3ad_handle_link_change(struct slave *slave, char link)
+{
+ struct port *port;
+
+ port = &(SLAVE_AD_INFO(slave).port);
+
+ // if slave is null, the whole port is not initialized
+ if (!port->slave) {
+#ifdef BONDING_DEBUG
+ printk(KERN_WARNING "bonding: Warning: link status changed for uninitialized port on %s\n",
+ slave->dev->name);
+#endif
+ return;
+ }
+
+ // on link down we are zeroing duplex and speed since some of the adaptors(ce1000.lan) report full duplex/speed instead of N/A(duplex) / 0(speed)
+ // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report
+ if (link == BOND_LINK_UP) {
+ port->is_enabled = 1;
+ port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
+ port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port);
+ port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
+ port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1);
+ } else {
+ /* link has failed */
+ port->is_enabled = 0;
+ port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
+ port->actor_oper_port_key= (port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS);
+ }
+ //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
+ // there is no need to reselect a new aggregator, just signal the
+ // state machines to reinitialize
+ port->sm_vars |= AD_PORT_BEGIN;
+}
+
+/**
+ * bond_3ad_get_active_agg_info - get information of the active aggregator
+ * @bond: bonding struct to work on
+ * @ad_info: ad_info struct to fill with the bond's info
+ *
+ * Returns: 0 on success
+ * < 0 on error
+ */
+int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
+{
+ struct aggregator *aggregator = NULL;
+ struct port *port;
+
+ for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
+ if (port->aggregator && port->aggregator->is_active) {
+ aggregator = port->aggregator;
+ break;
+ }
+ }
+
+ if (aggregator) {
+ ad_info->aggregator_id = aggregator->aggregator_identifier;
+ ad_info->ports = aggregator->num_of_ports;
+ ad_info->actor_key = aggregator->actor_oper_aggregator_key;
+ ad_info->partner_key = aggregator->partner_oper_aggregator_key;
+ memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN);
+ return 0;
+ }
+
+ return -1;
+}
+
+int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
+{
+ slave_t *slave, *start_at;
+ struct bonding *bond = (struct bonding *) dev->priv;
+ struct ethhdr *data = (struct ethhdr *)skb->data;
+ int slave_agg_no;
+ int slaves_in_agg;
+ int agg_id;
+ struct ad_info ad_info;
+
+ if (!IS_UP(dev)) { /* bond down */
+ dev_kfree_skb(skb);
+ return 0;
+ }
+
+ if (bond == NULL) {
+ printk(KERN_CRIT "bonding: Error: bond is NULL on device %s\n", dev->name);
+ dev_kfree_skb(skb);
+ return 0;
+ }
+
+ read_lock(&bond->lock);
+ slave = bond->prev;
+
+ /* check if bond is empty */
+ if ((slave == (struct slave *) bond) || (bond->slave_cnt == 0)) {
+ printk(KERN_DEBUG "ERROR: bond is empty\n");
+ dev_kfree_skb(skb);
+ read_unlock(&bond->lock);
+ return 0;
+ }
+
+ if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
+ printk(KERN_DEBUG "ERROR: bond_3ad_get_active_agg_info failed\n");
+ dev_kfree_skb(skb);
+ read_unlock(&bond->lock);
+ return 0;
+ }
+
+ slaves_in_agg = ad_info.ports;
+ agg_id = ad_info.aggregator_id;
+
+ if (slaves_in_agg == 0) {
+ /*the aggregator is empty*/
+ printk(KERN_DEBUG "ERROR: active aggregator is empty\n");
+ dev_kfree_skb(skb);
+ read_unlock(&bond->lock);
+ return 0;
+ }
+
+ /* we're at the root, get the first slave */
+ if ((slave == NULL) || (slave->dev == NULL)) {
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+ read_unlock(&bond->lock);
+ return 0;
+ }
+
+ slave_agg_no = (data->h_dest[5]^slave->dev->dev_addr[5]) % slaves_in_agg;
+ while (slave != (slave_t *)bond) {
+ struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
+
+ if (agg && (agg->aggregator_identifier == agg_id)) {
+ slave_agg_no--;
+ if (slave_agg_no < 0) {
+ break;
+ }
+ }
+
+ slave = slave->prev;
+ if (slave == NULL) {
+ printk(KERN_ERR "bonding: Error: slave is NULL\n");
+ dev_kfree_skb(skb);
+ read_unlock(&bond->lock);
+ return 0;
+ }
+ }
+
+ if (slave == (slave_t *)bond) {
+ printk(KERN_ERR "bonding: Error: Couldn't find a slave to tx on for aggregator ID %d\n", agg_id);
+ dev_kfree_skb(skb);
+ read_unlock(&bond->lock);
+ return 0;
+ }
+
+ start_at = slave;
+
+ do {
+ int slave_agg_id = 0;
+ struct aggregator *agg;
+
+ if (slave == NULL) {
+ printk(KERN_ERR "bonding: Error: slave is NULL\n");
+ dev_kfree_skb(skb);
+ read_unlock(&bond->lock);
+ return 0;
+ }
+
+ agg = SLAVE_AD_INFO(slave).port.aggregator;
+
+ if (agg) {
+ slave_agg_id = agg->aggregator_identifier;
+ }
+
+ if (SLAVE_IS_OK(slave) &&
+ agg && (slave_agg_id == agg_id)) {
+ skb->dev = slave->dev;
+ skb->priority = 1;
+ dev_queue_xmit(skb);
+ read_unlock(&bond->lock);
+ return 0;
+ }
+ } while ((slave = slave->next) != start_at);
+
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+ read_unlock(&bond->lock);
+ return 0;
+}
+
+int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype)
+{
+ struct bonding *bond = (struct bonding *)dev->priv;
+ struct slave *slave = NULL;
+ int ret = NET_RX_DROP;
+
+ if (!(dev->flags & IFF_MASTER)) {
+ goto out;
+ }
+
+ read_lock(&bond->lock);
+ slave = bond_get_slave_by_dev((struct bonding *)dev->priv,
+ skb->real_dev);
+ if (slave == NULL) {
+ goto out_unlock;
+ }
+
+ bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len);
+
+ ret = NET_RX_SUCCESS;
+
+out_unlock:
+ read_unlock(&bond->lock);
+out:
+ dev_kfree_skb(skb);
+
+ return ret;
+}
+
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)