URL
https://opencores.org/ocsvn/or1k/or1k/trunk
Subversion Repositories or1k
[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [net/] [bonding/] [bond_3ad.c] - Rev 1765
Compare with Previous | Blame | View Log
/* * 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. * * * 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. * * 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com> * - Code cleanup and style changes */ //#define BONDING_DEBUG 1 #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; static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; // ================= 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) { if (bond->slave_cnt == 0) { return NULL; } return &(SLAVE_AD_INFO(bond->first_slave).port); } /** * __get_next_port - get the next port in the bond * @port: the port we're looking at * * Return the port of the slave that is next in line of @port's slave in the * bond, or %NULL if it can't be found. */ static inline struct port *__get_next_port(struct port *port) { struct bonding *bond = __get_bond_by_port(port); struct slave *slave = port->slave; // If there's no bond for this port, or this is the last slave if ((bond == NULL) || (slave->next == bond->first_slave)) { return NULL; } return &(SLAVE_AD_INFO(slave->next).port); } /** * __get_first_agg - get the first aggregator in the bond * @bond: the bond we're looking at * * Return the aggregator of the first slave in @bond, or %NULL if it can't be * found. */ static inline struct aggregator *__get_first_agg(struct port *port) { struct bonding *bond = __get_bond_by_port(port); // If there's no bond for this port, or bond has no slaves if ((bond == NULL) || (bond->slave_cnt == 0)) { return NULL; } return &(SLAVE_AD_INFO(bond->first_slave).aggregator); } /** * __get_next_agg - get the next aggregator in the bond * @aggregator: the aggregator we're looking at * * Return the aggregator of the slave that is next in line of @aggregator's * slave in the bond, or %NULL if it can't be found. */ static inline struct aggregator *__get_next_agg(struct aggregator *aggregator) { struct slave *slave = aggregator->slave; struct bonding *bond = bond_get_bond_by_slave(slave); // If there's no bond for this aggregator, or this is the last slave if ((bond == NULL) || (slave->next == bond->first_slave)) { return NULL; } return &(SLAVE_AD_INFO(slave->next).aggregator); } /** * __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; } } dprintk("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; dprintk("Port %d Received status full duplex update from adapter\n", port->actor_port_number); break; case DUPLEX_HALF: default: retval=0x0; dprintk("Port %d Received status NOT full duplex update from adapter\n", port->actor_port_number); break; } } return retval; } /** * __initialize_port_locks - initialize a port's 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) { dprintk("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_mux_state); switch (port->sm_mux_state) { case AD_MUX_DETACHED: __detach_bond_from_agg(port); port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; ad_disable_collecting_distributing(port); port->actor_oper_port_state &= ~AD_STATE_COLLECTING; port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; port->ntt = 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)) { dprintk("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_rx_state); switch (port->sm_rx_state) { case AD_RX_INITIALIZE: if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) { port->sm_vars &= ~AD_PORT_LACP_ENABLED; } else { port->sm_vars |= AD_PORT_LACP_ENABLED; } port->sm_vars &= ~AD_PORT_SELECTED; __record_default(port); port->actor_oper_port_state &= ~AD_STATE_EXPIRED; port->sm_vars &= ~AD_PORT_MOVED; port->sm_rx_state = AD_RX_PORT_DISABLED; // next state /*- Fall Through -*/ case AD_RX_PORT_DISABLED: port->sm_vars &= ~AD_PORT_MATCHED; break; case AD_RX_LACP_DISABLED: port->sm_vars &= ~AD_PORT_SELECTED; __record_default(port); port->partner_oper_port_state &= ~AD_STATE_AGGREGATION; port->sm_vars |= AD_PORT_MATCHED; port->actor_oper_port_state &= ~AD_STATE_EXPIRED; break; case AD_RX_EXPIRED: //Reset of the Synchronization flag. (Standard 43.4.12) //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port. port->partner_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; port->sm_vars &= ~AD_PORT_MATCHED; port->partner_oper_port_state |= AD_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 DRV_NAME ": 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) { dprintk("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 = 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) { dprintk("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_periodic_state); switch (port->sm_periodic_state) { case AD_NO_PERIODIC: port->sm_periodic_timer_counter = 0; // zero timer break; case AD_FAST_PERIODIC: port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle break; case AD_SLOW_PERIODIC: port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle break; case AD_PERIODIC_TX: port->ntt = 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; dprintk("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 printk(KERN_WARNING DRV_NAME ": 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; dprintk("Port %d joined LAG %d(existing LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier); // mark this port as selected port->sm_vars |= AD_PORT_SELECTED; found = 1; break; } } // the port couldn't find an aggregator - attach it to a new aggregator if (!found) { if (free_aggregator) { // assign port a new aggregator port->aggregator = free_aggregator; port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier; // update the new aggregator's parameters // if port was responsed from the end-user if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) {// if port is full duplex port->aggregator->is_individual = 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; dprintk("Port %d joined LAG %d(new LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier); } else { printk(KERN_ERR DRV_NAME ": 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)) { dprintk("Agg=%d; Ports=%d; a key=%d; p key=%d; Indiv=%d; Active=%d\n", 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 DRV_NAME ": 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) { dprintk("Warning: More than one Link Aggregation Group was " "found in the bond. Only one group will function in the bond\n"); } best_aggregator->is_active = 1; dprintk("LAG %d choosed as the active LAG\n", best_aggregator->aggregator_identifier); dprintk("Agg=%d; Ports=%d; a key=%d; p key=%d; Indiv=%d; Active=%d\n", 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; dprintk("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) { 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) { dprintk("Enabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier); __enable_port(port); } } /** * ad_disable_collecting_distributing - disable a port's transmit/receive * @port: the port we're looking at * */ static void ad_disable_collecting_distributing(struct port *port) { if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) { dprintk("Disabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier); __disable_port(port); } } #if 0 /** * ad_marker_info_send - send a marker information frame * @port: the port we're looking at * * This function does nothing since we decided not to implement send and handle * response for marker PDU's, in this stage, but only to respond to marker * information. */ static void ad_marker_info_send(struct port *port) { struct 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) { dprintk("Sent Marker Information on port %d\n", port->actor_port_number); } } #endif /** * ad_marker_info_received - handle receive of a Marker information frame * @marker_info: Marker info received * @port: the port we're looking at * */ static void ad_marker_info_received(struct 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) { dprintk("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 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->dev->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->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; // 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_ERR "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->dev->dev_addr); aggregator->aggregator_identifier = (++aggregator_identifier); aggregator->slave = slave; aggregator->is_active = 0; aggregator->num_of_ports = 0; } return 0; } /** * bond_3ad_unbind_slave - deinitialize a slave's port * @slave: slave struct to work on * * Search for the aggregator that is related to this port, remove the * aggregator and assign another aggregator for other port related to it * (if any), and remove the port. */ void bond_3ad_unbind_slave(struct slave *slave) { struct port *port, *prev_port, *temp_port; struct aggregator *aggregator, *new_aggregator, *temp_aggregator; int select_new_active_agg = 0; // find the aggregator related to this slave aggregator = &(SLAVE_AD_INFO(slave).aggregator); // find the port related to this slave port = &(SLAVE_AD_INFO(slave).port); // if slave is null, the whole port is not initialized if (!port->slave) { printk(KERN_WARNING DRV_NAME ": Trying to unbind an uninitialized port on %s\n", slave->dev->name); return; } dprintk("Unbinding Link Aggregation Group %d\n", aggregator->aggregator_identifier); /* Tell the partner that this port is not suitable for aggregation */ port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; __update_lacpdu_from_port(port); ad_lacpdu_send(port); // check if this aggregator is occupied if (aggregator->lag_ports) { // check if there are other ports related to this aggregator except // the port related to this slave(thats ensure us that there is a // reason to search for new aggregator, and that we will find one if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) { // find new aggregator for the related port(s) new_aggregator = __get_first_agg(port); for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) { // if the new aggregator is empty, or it 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))) { dprintk("Some port(s) related to LAG %d - replaceing with LAG %d\n", aggregator->aggregator_identifier, new_aggregator->aggregator_identifier); if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) { printk(KERN_INFO DRV_NAME ": 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 DRV_NAME ": 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)); } } } dprintk("Unbinding port %d\n", port->actor_port_number); // find the aggregator that this port is connected to temp_aggregator = __get_first_agg(port); for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) { prev_port = NULL; // search the port in the aggregator's related ports for (temp_port=temp_aggregator->lag_ports; temp_port; prev_port=temp_port, temp_port=temp_port->next_port_in_aggregator) { if (temp_port == port) { // the aggregator found - detach the port from this aggregator if (prev_port) { prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; } else { temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; } temp_aggregator->num_of_ports--; if (temp_aggregator->num_of_ports==0) { select_new_active_agg = temp_aggregator->is_active; // clear the aggregator ad_clear_agg(temp_aggregator); if (select_new_active_agg) { 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); if (bond->kill_timers) { goto out; } //check if there are any slaves if (bond->slave_cnt == 0) { goto re_arm; } // check if agg_select_timer timer after initialize is timed out if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) { // select the active aggregator for the bond if ((port = __get_first_port(bond))) { if (!port->slave) { printk(KERN_WARNING DRV_NAME ": Warning: bond's first port is uninitialized\n"); goto re_arm; } 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 DRV_NAME ": Warning: Found an uninitialized port\n"); goto re_arm; } 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; } } re_arm: mod_timer(&(BOND_AD_INFO(bond).ad_timer), jiffies + ad_delta_in_ticks); out: read_unlock(&bond->lock); } /** * bond_3ad_rx_indication - handle a received frame * @lacpdu: received lacpdu * @slave: slave struct to work on * @length: length of the data received * * It is assumed that frames that were sent on this NIC don't returned as new * received frames (loopback). Since only the payload is given to this * function, it check for loopback. */ 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 DRV_NAME ": Warning: port of slave %s is uninitialized\n", slave->dev->name); return; } switch (lacpdu->subtype) { case AD_TYPE_LACPDU: __ntohs_lacpdu(lacpdu); dprintk("Received LACPDU on port %d\n", 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: dprintk("Received Marker Information on port %d\n", port->actor_port_number); ad_marker_info_received((struct marker *)lacpdu, port); break; case AD_MARKER_RESPONSE_SUBTYPE: dprintk("Received Marker Response on port %d\n", port->actor_port_number); ad_marker_response_received((struct marker *)lacpdu, port); break; default: dprintk("Received an unknown Marker subtype on slot %d\n", 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 DRV_NAME ": 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); dprintk("Port %d changed speed\n", port->actor_port_number); // there is no need to reselect a new aggregator, just signal the // state machines to reinitialize port->sm_vars |= AD_PORT_BEGIN; } /** * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication * @slave: slave struct to work on * * Handle reselection of aggregator (if needed) for this port. */ void bond_3ad_adapter_duplex_changed(struct slave *slave) { struct port *port; port=&(SLAVE_AD_INFO(slave).port); // if slave is null, the whole port is not initialized if (!port->slave) { printk(KERN_WARNING DRV_NAME ": 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); dprintk("Port %d changed duplex\n", port->actor_port_number); // there is no need to reselect a new aggregator, just signal the // state machines to reinitialize port->sm_vars |= AD_PORT_BEGIN; } /** * bond_3ad_handle_link_change - handle a slave's link status change indication * @slave: slave struct to work on * @status: whether the link is now up or down * * Handle reselection of aggregator (if needed) for this port. */ void bond_3ad_handle_link_change(struct slave *slave, char link) { struct port *port; port = &(SLAVE_AD_INFO(slave).port); // if slave is null, the whole port is not initialized if (!port->slave) { printk(KERN_WARNING DRV_NAME ": Warning: link status changed for uninitialized port on %s\n", slave->dev->name); return; } // on link down we are zeroing duplex and speed since some of the adaptors(ce1000.lan) report full duplex/speed instead of N/A(duplex) / 0(speed) // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report if (link == BOND_LINK_UP) { port->is_enabled = 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) { struct slave *slave, *start_at; struct bonding *bond = dev->priv; struct ethhdr *data = (struct ethhdr *)skb->data; int slave_agg_no; int slaves_in_agg; int agg_id; int i; struct ad_info ad_info; int res = 1; /* make sure that the slaves list will * not change during tx */ read_lock(&bond->lock); if (!BOND_IS_OK(bond)) { goto out; } if (bond_3ad_get_active_agg_info(bond, &ad_info)) { printk(KERN_DEBUG "ERROR: bond_3ad_get_active_agg_info failed\n"); goto out; } 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"); goto out; } slave_agg_no = (data->h_dest[5]^bond->dev->dev_addr[5]) % slaves_in_agg; bond_for_each_slave(bond, slave, i) { struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; if (agg && (agg->aggregator_identifier == agg_id)) { slave_agg_no--; if (slave_agg_no < 0) { break; } } } if (slave_agg_no >= 0) { printk(KERN_ERR DRV_NAME ": Error: Couldn't find a slave to tx on for aggregator ID %d\n", agg_id); goto out; } start_at = slave; bond_for_each_slave_from(bond, slave, i, start_at) { int slave_agg_id = 0; struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; if (agg) { slave_agg_id = agg->aggregator_identifier; } if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) { res = bond_dev_queue_xmit(bond, skb, slave->dev); break; } } out: if (res) { /* no suitable interface, frame not sent */ dev_kfree_skb(skb); } 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 = 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; }